JP2001153036A - Cam device, automatic chemical feeder with the cam device, and tray fitting structure of automatic chemical feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic chemical feeder uniformly and stably discharging the chemical during discharge by incorporating a cam device setting stable the movement speed of the linear movement in changing the rotation movement to the linear movement. SOLUTION: This automatic chemical feeder detects the using operation of a user by a sensor 32 to actuate a pump drive mechanism 40 and automatically feed the chemical in a liquid chemical vessel by a manual pump mechanism 23. The pump drive mechanism is provided with a cam device 43 having a cam plate 44 rotated by a motor 41 and a cam driven member 45 linearly reciprocating by interlocked with the rotation movement. This feeder is characterized that a prescribed portion in the circumferential edge shape of the cam plate is formed of a spiral curve prescribed by an equation r=aθ [(r), θ, and (a) express a radius vector, a drift angle, and a constant respectively] in two-dimensional polar coordinates expression with the rotation center of the cam plate set to the origin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cam device having a cam plate and a cam follower member which performs a linear motion in conjunction with the rotation of the cam plate, an automatic chemical liquid supply device incorporating the cam device, and an automatic chemical liquid supply device. The present invention relates to a tray mounting structure for a chemical liquid supply device.

[0002]

2. Description of the Related Art Conventionally, as a supply device (so-called dispenser) for supplying a chemical solution such as a soap solution or a disinfectant solution for cleaning or disinfecting a hand or a fingertip, the operation of a user (user) has been described. Specifically, there has been known an automatic chemical liquid supply device that can automatically supply a chemical liquid by detecting an operation of, for example, a hand reaching out by a user. For example, JP-A-9
No. -14129 discloses a chemical solution container having a manual pump mechanism widely used in homes and the like for supplying a constant amount of a soap solution and the like, a crank type pump drive mechanism for driving the manual pump mechanism, and a human pump. A detection sensor for detecting a use operation of the user by sensing a hand or the like, and the manual pump mechanism is driven in accordance with a detection signal from the detection sensor, so that the liquid medicine in the liquid medicine container can be automatically supplied. Is disclosed.

[0003] By adopting such a configuration, the pump mechanism can be driven in a non-contact manner to automate the supply of the chemical solution, and a more clean and sanitary supply of the chemical solution can be performed. In addition, the replenishment of the chemical solution and the change of the type can be easily performed by replacing the entire container, and furthermore, the risk of inconveniences such as contamination or contamination during the replacement can be minimized. . Further, the power supply to the pump drive mechanism for driving the pump mechanism of the chemical solution container and the detection sensor is performed by a battery (dry battery) built in the device, thereby facilitating the movement of the chemical solution supply device. The device can be installed at a desired place.

As is well known, the pump mechanism for a chemical solution container as described above is attached to a sealing cap for sealing an opening of the container, and is inserted into the container to suck out the chemical solution stored therein. A suction pipe, a discharge nozzle for discharging the sucked chemical solution to the outside, and an operation unit (pressing head) in which an inlet side of the discharge nozzle and an outlet side of the suction pipe are connected, By pushing the pressing head substantially along the axis of the outlet side portion of the suction pipe, a certain amount of the chemical solution is discharged each time the pushing operation is performed. The automatic chemical liquid supply device automatically performs the pressing operation of the pressing head. For example, in the device disclosed in the above-mentioned conventional publication, a pressing mechanism of the pressing head is provided by providing a crank mechanism connected to an electric motor. Operations are automated.

[0005]

SUMMARY OF THE INVENTION The present inventor of the present invention has been conducting research and development for further improving the performance of an automatic chemical liquid supply device incorporating such a chemical liquid container with a pump mechanism. In order to make the ejection state uniform and stable during the ejection period, the pushing speed when pushing the pushing head of the pump mechanism is set as follows:
It has been found that it is important to maintain as constant as possible during the pushing stroke.

In particular, when a chemical solution in a container is ejected in the form of a mist or a foam (a so-called spray pump or forming pump), if the pushing speed fluctuates to a certain degree or more during the stroke, the spray angle is increased. Is too small, the chemical solution does not spread sufficiently, or the particle size of the foam is too coarse to obtain a sufficiently fine foam. May be partially dripped into a liquid, making it difficult to sufficiently disinfect or wash hands and to significantly impair the feeling of use.

Therefore, when using such a pump, it is more important to keep the pushing speed of the pressing head as constant as possible to maintain a good discharge state. The quality of the ejection state is usually evaluated by visual observation. In this evaluation, the state of the latter half of the pushing stroke, particularly, the state at the end of the stroke is greatly affected. Therefore, it is particularly important to keep the pushing speed in the latter half of the stroke including the vicinity of the discharge end point constant.

[0008] In the automatic chemical liquid supply device disclosed in the above-mentioned conventional publication, the driving operation of the pump mechanism (the pressing operation of the pressing head) is performed by a crank mechanism connected to an electric motor. By engaging the base end of the crank with a projection provided near the periphery of the disk rotated by the electric motor via the gear mechanism, the rotational movement of the electric motor is converted into a vertical reciprocating movement of the crank, The pump mechanism is driven by the tip of the crank, and the movement of the tip of the crank during the pushing stroke is performed at an irregular speed if the rotation speed of the motor is constant. . Therefore, the pushing speed at the time of pushing the pressing head of the pump mechanism greatly changes from the start to the end of the stroke, and the discharge state of the chemical solution from the discharge nozzle is uniform and stable during the discharge period. It is difficult to do.

Further, the driving operation of the pump mechanism is performed not by the crank mechanism as described above, but by a cam plate that is rotationally driven by a motor, and a cam that slides in a linear reciprocating motion by slidingly contacting the periphery of the cam plate. It is also conceivable to use a cam device having a driven member. in this case,
For example, as shown in FIG. 32, the most common configuration of the cam plate 144 is a configuration in which the peripheral shape is a simple circular shape, and the rotating shaft 144s is offset (eccentric) from the center of the circle.

However, as shown in FIG. 33, in this case also, if the rotation speed of the cam plate 144 is constant, the linear movement of the cam follower during the stroke period will be unequal. Also, this cam plate 1
In the case where the cam follower 44 is used, the cam follower performs the pushing operation while the cam plate 144 rotates by 180 degrees,
The return operation is performed while rotating the remaining 180 degrees. Such a cam device is affected by a spring mounted in a manual pump mechanism of a chemical solution container when actually used in an automatic chemical solution supply device. That is, the spring exerts a reaction force on the pump pushing operation, and the spring force assists the return operation. Therefore, as in the case of the above-mentioned circular eccentric cam, when the pushing operation is performed only by rotating the cam plate 144 by 180 degrees, the load increases, and a motor for applying a driving force to the cam plate 144 and a reduction gear thereof are used. Has an adverse effect on life. When a dry battery is used as a power source, current consumption is large and the battery life is short. The operating characteristics of the circular eccentric cam shown in FIGS. 32 and 33 will be described later in more detail.

A so-called Archimedes spiral curve, which is defined by the following equation in polar coordinates, is known as a kind of spiral two-dimensional curve that can be geometrically drawn with a regularity. In this equation, the symbol r is a moving radius, θ is a declination, and a is a constant. r = aθ In the Archimedes spiral curve represented by this equation, a moving speed v (= dr) with respect to an angle change of a point moving on the curve.
/ Dθ) is constant (v = a). In other words, by applying this Archimedes spiral curve to the peripheral shape of the cam plate, if the rotational speed of the cam plate is constant, the rotational movement of the cam plate is converted into a linear movement operation of the cam driven member that slides on the peripheral portion. It is possible to keep the moving speed at the time of performing. Further, when the driving operation of the manual pump mechanism of the automatic chemical liquid supply device is performed by a cam device driven by a motor, the peripheral edge of the cam plate is set so that the rotation angle of the cam plate corresponding to the pump pushing operation period becomes larger than 180 degrees. By setting the shape,
The life of the drive motor and its reduction gear can be reduced by reducing the load on the drive motor and the reduction gear, and the current consumption can be reduced.

Further, the above-mentioned automatic chemical liquid supply device has the following features.
There is a table mounting type that is used by mounting it on a flat place such as a table, but there are many cases of a wall mounting type that is used by being fixed to a vertical wall. In the case of the wall-mounted type, a tray is provided at the lower end of the apparatus case so as to vertically project forward with respect to the case in order to improve the convenience of the user. For example, such a tray needs to be cleaned or disinfected periodically to maintain sanitary conditions.To perform sufficient cleaning or disinfection work, it is necessary to remove the tray from the device case. desirable.
However, conventionally, in order to remove the tray, it is necessary to remove the apparatus itself from the vertical wall and remove the tray from the apparatus case, and there is a problem that the cleaning or disinfection of the tray is troublesome and troublesome.

The present invention has been made in view of the above-mentioned problems, and focuses on the characteristics of the Archimedes spiral curve, so that the rotational movement of the cam plate is linearly moved by the cam follower slidingly contacting the peripheral edge of the cam plate. Provided is a cam device that can keep the moving speed of the linear motion at the time of conversion into a constant value, and by incorporating such a cam device, makes the discharge state of the chemical solution uniform and stable during the discharge period. To provide an automatic chemical liquid supply device capable of reducing the load on the drive motor and thus reducing the current consumption, and furthermore, the automatic chemical liquid supply device capable of easily attaching and detaching the tray. The purpose of the present invention is to provide a tray mounting structure.

[0014]

Therefore, a cam device according to the invention of claim 1 of the present application (hereinafter referred to as a first invention)
A cam plate having a predetermined peripheral shape and a rotation center set at a predetermined portion; and a cam driven member having a sliding contact portion capable of slidingly contacting the peripheral portion of the cam plate. Assuming a cam device in which the cam follower member performs a linear motion, a predetermined portion of the peripheral edge of the cam plate is expressed by a formula r = aθ (r Is the radial, θ is the declination,
a is a constant defined by a spiral curve.

The invention of claim 2 of the present application (hereinafter referred to as “second
An automatic chemical liquid supply device according to the present invention includes a chemical liquid container having a manual pump mechanism, a pump drive mechanism for driving the manual pump mechanism, a power supply unit for supplying drive power to the pump drive mechanism, and a user. And a control unit for controlling the operation of the pump drive mechanism according to an output signal from the detection sensor,
When the detection sensor detects a user's use operation,
The pump drive mechanism drives the manual pump mechanism, and presupposes an automatic chemical liquid supply device that can automatically supply the chemical liquid in the chemical liquid container.The pump drive mechanism is electrically driven by the control unit. A motor, a cam plate connected to an output shaft of the electric motor, and a reciprocating linear operation interlocked with the rotation of the cam plate which is slidably disposed on a peripheral portion of the cam plate. A cam device having a cam driven member for driving a manual pump mechanism is provided. A predetermined portion of a peripheral shape of the cam plate is expressed in a two-dimensional polar coordinate system with a rotation center of the cam plate as an origin, and an equation r = aθ (r is The moving radius is defined by a spiral curve defined by a radius, θ is an argument, and a is a constant.

Further, the invention of claim 3 of the present application (hereinafter referred to as the third invention)
In the automatic chemical liquid supply apparatus according to the second aspect, the manual pump mechanism may perform a pushing operation and a return operation in conjunction with a reciprocating linear operation of a cam driven member accompanying rotation of the cam plate. And a peripheral portion of a cam plate corresponding to a region including at least a substantially middle to a substantially end point in a pushing stroke of the head portion is formed by the spiral curve.

Further, according to a fourth aspect of the present invention, in the kinetic liquid supply apparatus according to the second aspect of the present invention, the manual pump mechanism is provided with the rotation of the cam plate. A head portion that performs a pushing operation and a returning operation in conjunction with the reciprocating linear operation of the cam follower member, and the rotation angle of the cam plate corresponding to the pushing operation period of the head portion is greater than 180 degrees. In such a case, the peripheral shape of the cam plate is set.

Further, according to a fifth aspect of the present invention (hereinafter referred to as a fifth invention), the liquid medicine supply apparatus according to any one of the second to fourth inventions, wherein the cam driven member is A vertical movement is performed, and a fall prevention mechanism for preventing the cam driven member from falling due to its own weight when the rotation of the cam plate is stopped is provided. is there.

Further, the tray mounting structure of the automatic chemical liquid supply device according to the invention of claim 6 of the present application (hereinafter referred to as a sixth invention) comprises a chemical liquid container provided with a manual pump mechanism, and the manual pump mechanism. A pump drive mechanism for driving, a power supply unit for supplying drive power to the pump drive mechanism, a detection sensor for detecting a user's use operation, and an operation of the pump drive mechanism in accordance with an output signal from the detection sensor. And a control unit for controlling, when the detection sensor detects a use operation of the user, the manual pump mechanism is driven by the pump drive mechanism, so that the liquid medicine in the liquid medicine container can be automatically supplied. A tray mounting structure for detachably attaching a tray projecting substantially vertically forward to the bottom side of the case body of the automated chemical liquid supply device, wherein the case body is provided at the rear of the tray. Mounting surface to the bottom side is provided,
A base portion extending substantially vertically upward at a predetermined portion of the mounting surface;
A locking hook having a locking portion protruding substantially perpendicularly from the distal end side of the base portion is provided, and a slot portion through which the locking portion of the locking hook is inserted is provided on the bottom surface side of the case body. An intermediate vertical wall and front and rear vertical walls which are located at the front and rear of the middle and are vertically longer than the base of the locking hook, respectively, and the tray is mounted on the bottom side of the case body. In this case, the locking portion of the locking hook is inserted into the slot of the intermediate vertical wall and locked, and the front ends of the front and rear vertical walls face the mounting surface of the tray. It is characterized by having.

Further, according to the invention of claim 7 (hereinafter referred to as a seventh invention) of the present invention, the tray mounting structure of the automatic chemical liquid supply apparatus according to the sixth invention, wherein Is provided with a small convex portion having a predetermined height protruding in the vertical direction.

[0021]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is an overall perspective view of an automatic chemical liquid supply device according to the present embodiment, and FIG. 2 is a perspective view showing a state in which a front cover of the device is opened. As shown in these figures, the automatic chemical liquid supply device 1
Is provided with a battery box 2 for accommodating a dry battery as a power supply and a control box 3 for accommodating a control unit and an electric motor described later in a substantially rectangular parallelepiped device case 10. A chemical solution container 20 having a manual pump mechanism is housed in the space, and this chemical solution container 2
A pump drive mechanism (to be described later) that drives the manual pump mechanism is provided behind the zero.

The device case 10 is made of, for example, resin.
A front cover 12 that can be opened and closed with respect to a case body 11 having a predetermined depth is provided. In the upper part of the front cover 12, a vertically elongated nozzle slot 13 for projecting the discharge nozzle 26 of the chemical solution container 20 to the front of the apparatus, and a circular opening 14 for projecting a detection sensor 32 and an indicator 33 to be described later to the front of the apparatus, respectively. 15 are provided (see FIG. 2). The slot 13 and the opening 1
A substantially transparent front panel 16 is fitted beneath 4 and 15. Through this panel 16, the container body 21 of the chemical solution container 20 stored in the apparatus case 10 can be visually recognized. Even if the cover 12 is closed, the type of the chemical solution currently used can be identified.

When replenishing a chemical solution or changing its type, the whole container is replaced. Therefore, it is easy to supply the chemical solution and change the type thereof, and at the same time, it is possible to minimize the possibility of inconvenience such as mixing of foreign matter and contamination. When using the apparatus, when closing the front side of the case body 11 with the front cover 12, a key hole 12 h provided in the metal fitting 12 a at the upper end of the front cover 12 and a key hole formed in the upper end of the case body 11 are used. 11h, the lock key 17 is fitted from above and rotated in a state where the key holes 11h and 12h are overlapped. As a result, the front cover 12 is
Is locked (locked) with respect to.

As shown in FIG. 3, for example, the chemical liquid container 20 includes a container main body 21 for storing a chemical liquid, a sealing cap 22 for sealing an opening of the container main body 21, and a chemical liquid in the container main body 21. Pump mechanism 2 that discharges water to the outside
3 is provided. The pump mechanism 23 includes a suction pump section 24 fixed to the sealing cap 22, a pressing head 25 (pressing operation section) having a piston pipe 25 p inserted reciprocally with respect to the pump section 24, A discharge nozzle 26 that is coupled to the pressing head 25 and discharges the sucked chemical toward the outside. A suction pipe 27 inserted into the chemical of the container body 21 is provided at the lower end of the pump unit 24. Are combined.

Then, the pressing head 25 is connected to the container body 2.
1 substantially along the axis (that is, the piston tube 25).
By pushing p into the pump section 24), a certain amount of the chemical solution is discharged from the nozzle 26 each time the pushing operation is performed. The manual pump mechanism 23 is
Since it has the same configuration and performs the same operation as those conventionally well known, further detailed description and illustration are omitted.

FIG. 4 is a block diagram for explaining the outline of the configuration of the automatic chemical liquid supply device 1. As shown in FIG. The automatic chemical solution supply device 1 includes a control unit 30 which is a control circuit board on which various electric components or electronic components are arranged, for example, on a circuit board. It is stored. The control unit 30 includes a power supply 3 housed in the battery box 2.
As 1, for example, four single type dry batteries are electrically connected. Further, in addition to the above-described detection sensor 32 and indicator 33, various switches such as a sensor switch 34 and a mode switch 35 are electrically connected to the control unit 30.

The detection sensor 32 is of, for example, an infrared type, and detects a user's use operation by detecting a human hand Hd or a fingertip using infrared rays. 30 is input. The indicator 33 indicates whether or not the device 1 is in a normally operable state. When the device 1 is normally operable, the indicator 33 indicates, for example, green, and when the voltage of the power supply 31 is equal to or lower than the set value, the device 1 operates normally. When it is not possible to perform, for example, it shines red and informs.

Further, the sensor switch 34 turns on / off (ОN / ОFF) the operation of the detection sensor 32, which is normally set to 、 N.
When the operation of the detection sensor 32 is to be stopped, for example, when the sensor is replaced, it is switched to the #FF side. The sensor switch 34 is attached to, for example, a side surface of the device case 10. The mode switch 35 is used to select and set the discharge mode of the chemical solution. By switching the mode switch 35, the mode of the chemical solution is determined with respect to one detection of the user's use operation by the detection sensor 32. It is possible to select whether to perform multiple discharges.

Further, the control unit 30 includes:
A pump drive mechanism 40 for driving the manual pump mechanism 23 of the drug solution container 20 to automatically discharge the drug solution in the container body 21 from the discharge nozzle 26 is electrically connected.
The pump drive mechanism 40 is connected to a power supply 31 via the control unit 30 and is driven and controlled in accordance with a control signal from the control unit 30. And a cam device 43 that is rotationally driven by the rotational force transmitted through the gear unit 42.

As will be described later in detail, the cam device 43 has a cam plate 44 having a predetermined peripheral shape and a rotation center set at a predetermined portion, and a slide capable of sliding on the peripheral portion of the cam plate 44. And a cam follower 45 having a contact portion. The cam follower 45 performs a linear motion with the rotation of the cam plate 44. The cam follower 45 is positioned such that its top plate 45a abuts on the upper end of the pressing head 25 of the pump mechanism 23 of the chemical liquid container 20, as indicated by a virtual line in FIG. The pump mechanism 23 is driven by the linear movement of the pump mechanism 23.

As shown in FIGS. 5 and 6, the electric motor 41, the reduction gear unit 43, and the cam plate 44 of the pump drive mechanism 40 are composed of one flat base plate 49.
Attached to. The reduction gear unit 43 includes:
An input gear 43A meshing with a motor gear 41G coupled to a motor output shaft 41s;
4s, and an output gear 43C coupled to the output gear 43C.
And between the input gear 43A and both gears 43A and 43A.
C and an intermediate gear 43B that meshes with the rotation shaft C. The rotation of the motor output shaft 41s is reduced at a predetermined reduction ratio and transmitted to the rotation shaft 44s of the cam plate 44.

The rotation axis 44s of the cam plate 44
Is pivotally supported (rotatably supported) on a base plate 49 via a bearing 48. A projection 44p is integrally provided on the lower surface side of the cam plate 44. For example, a limit switch (not shown) is disposed in the vicinity so that the rotation angle or the number of rotations of the cam plate 44 can be measured. .

As shown in FIGS. 7 to 9, the cam follower member 45 has a slide plate 45b slidably supported vertically by a guide case 46 described below and a substantially right angle from the upper end of the slide plate 45b. Overhanging top plate 45a
, So as to form a substantially L-shaped basic shape in a side view. The overall shape of the slide plate 45b is rectangular in a front view. A concave portion 45c having a predetermined depth is formed on the back side of the slide plate 45b. When the pump driving mechanism 40 is assembled, the cam plate 44 is housed in the concave portion 45c, and the concave portion 45c is formed.
The inner surface 45d of the vertical wall slides on the peripheral portion of the cam plate 44. The cam follower 45 is integrally formed of, for example, synthetic resin, and has a top plate 45 a and a slide plate 45.
b are mutually connected by a plurality of large and small reinforcing ribs 45e and 45f.

As shown in FIGS. 10 to 12, a slide guide 46 for supporting the cam driven member 45 so as to be vertically slidable has a substantially rectangular shape as a whole.
A guide groove portion 46b that guides (guides) the left and right ends of the slide plate 45b of the cam driven member 45 in a vertically slidable manner, and a top portion having a width corresponding to the top plate 45a and a depth corresponding to the vertical stroke thereof. It has a guide case 45a formed with an open opening 45c. A stay 45d having a predetermined width is provided on the back side of the guide case 45a so as to bridge the lower end portion of the upper end portion. Slide guide 46
The pump driving mechanism 40 is fixed to the pump driving mechanism 40 using fixing screws (not shown) by the mounting holes 46f formed in the tabs 46e at the four corners.
Is fixed to the upper surface side (the side to which the cam plate 44 is attached) of the base plate 49.

FIGS. 13 and 14 are schematic explanatory views showing a state in which the cam follower member 45 in which the cam plate 44 is housed in the concave portion 45c is assembled to the slide guide 46 as viewed from the front side and the rear side, respectively. . Note that FIG.
The assembled state shown in FIG. 3 and FIG.
Indicates a state in which it is located at the upper end position of the stroke in the vertical reciprocation. As shown in these figures, a spring 47 for supporting the cam driven member 45 is interposed between the slide guide 46 and the cam driven member 45.

The spring 47 is shown in FIGS.
As shown in detail, the upper and lower mounting portions 47 extending at a predetermined angle with the spring body portion 47a wound in a coil shape.
The slide guide 46 is mounted between the front wall of the guide case 46a of the slide guide 46 and the slide plate 45b of the cam follower 45. The end of the upper mounting portion 47b is locked in the locking hole 45h of the slide plate 45b, and the end of the lower mounting portion 47c is locked in the locking hole 46h of the guide case 46a. The spring coefficient of the spring 47 can sufficiently support the own weight of the cam follower 45, and when the cam follower 45 performs a lowering operation by the action of the pump driving mechanism 40,
Appropriate settings are made so that an excessively large urging force is not hindered from smooth operation.

In the case of the cam plate 44 according to the present embodiment, the peripheral shape is a shape obtained by slightly deforming the egg shape, and as shown in FIGS. When the cam plate 4 is located at or near the upper end position of the stroke in the reciprocating motion,
4 is not in sliding contact with the upper side of the inner surface 45d of the vertical wall of the cam driven member 45. Therefore, for example, when the chemical solution container 20 is replaced, the driving of the motor 41 is stopped and the rotation of the cam plate 44 is stopped.
When the chemical solution container 20 is removed from below the top plate 45a, if the spring 47 is not provided, the cam follower 4
5 falls by its own weight to a position where the upper side of the vertical wall inner surface 45d contacts the upper edge of the cam plate 44.

Therefore, when replacing the chemical container 20, it is necessary to set the new chemical container below the top plate 45a while lifting the top plate 45a from the drop position after removing the old container 20, which is troublesome. It will be.
In addition, it is not preferable from the viewpoint of hygiene that a human hand touches the top plate 45a which is in direct contact with the chemical solution container 20.

However, in this embodiment, since the spring 47 is provided to support the cam follower member 45, the cam follower member 45 is located at or near the upper end position of the stroke in the vertical reciprocation thereof. In this state, even if the chemical solution container 20 is removed from below the top plate 45a of the cam driven member 45, the cam driven member 45 is supported by the urging force of the spring 47 and does not fall by its own weight. Therefore, when replacing the chemical container 20, even when the old container 20 is taken out, the top plate 4
Since 5a is maintained at or near the upper end position of the stroke in the vertical reciprocation of the cam follower member 45, a new chemical container can be set below the top plate 45a without touching the top plate 45a. . That is, the replacement operation can be performed easily and hygienically.

FIGS. 17 and 18 show another example of a mechanism for preventing the cam follower from dropping. In this example, the width direction of the opening 56c (the left-right direction in FIGS. 17 and 18) is provided at the upper opening end of the opening 56c of the slide guide 56.
A hook 56k that is elastically displaceable is provided integrally, and a hook portion 56m having a substantially triangular shape in a front view is formed at the distal end side of the hook 56k. On the other hand, the left and right outer ribs 55e of the cam follower 55
k is set so as to be able to engage with the tip hook portion 56m of the locking hook 56k.

When the cam follower 55 is located at or near the upper end of the stroke in the vertical reciprocating motion, the lower end 55k of the rib 55e is engaged with the tip hook 56m of the engaging hook 56k. Thus, the cam follower 55 is maintained at that position. When the cam follower 55 is lowered along with the rotation of the cam plate 44, the lower end 55k of the rib 55e is moved along the upper tapered surface 56t of the tip hook 56m of the locking hook 56k. At the same time, the locking hook 56k supported at the upper end by a cantilever is moved to the tip hook portion 56m.
Is elastically displaced outward so that the cam follower 55 can be lowered without any trouble.
The cam follower 55 and the slide guide 56 are
Portions of the cam driven member other than the fall prevention mechanism have the same configurations as those of the above-described 45 and 46, respectively.

In the state where the automatic chemical liquid supply device 1 having the above configuration is operable as usual (the indicator 33 is displayed in green), when the user extends his hand below the discharge nozzle 26 to use the device 1 ( In FIG. 2, the detection sensor 32 detects this use operation.
The detection signal is output to the control unit 30. And
The electric motor 41 of the pump drive mechanism 40 is driven based on this detection signal, and its rotational force is reduced by the reduction gear unit 42.
The cam plate 44 is transmitted to the cam device 43 via the. The rotational movement of the cam plate 44 is converted into a linear movement of a cam driven member 45, and the pressing head 25 of the pump mechanism 23 of the chemical liquid container 20 is pressed (pressed) by the cam driven member 45, and the discharge nozzle 26 A certain amount of the chemical is discharged toward the user's hand.

In the present embodiment, as described above, when the cam follower 45 pushes the pressing head 25 of the pump mechanism 23, the pushing speed is made as constant as possible during the pushing stroke. Is set. Hereinafter, this cam plate 44
A description will be given of the up-and-down operation of the cam follower member 45 accompanying the rotation operation.

FIG. 19 is an explanatory front view of the cam plate 44. FIG. As shown in this figure, the cam plate 44 according to the present embodiment has a peripheral shape obtained by slightly deforming the egg shape, and is centered on the axis of the rotation shaft 44s (the rotation center C).
s) is rotationally driven in the direction of the arrow (clockwise in FIG. 19). That is, the electric motor 41
Is driven, the cam plate 44 rotates around the point Cs in the direction of the arrow, starting at the point Po (rotation angle: φ = 0 degrees), starting at a point P1 (rotation angle: φ = 105 degrees) and at a point P2.
(Rotation angle: φ = 135 degrees), point P3 (rotation angle: φ = 26)
In the order of (2.5 degrees), the cam follower 45 slides along the inner surface 45d of the vertical wall along a curve defining the peripheral shape.

FIGS. 21 to 24 show the cam plate 4.
The vertical sliding motion between the peripheral portion of the cam plate 44 and the inner surface 45d of the vertical wall 45 of the cam driven member 45 and the vertical movement (downward movement) of the cam driven member 45 accompanying the rotation of the rotation of the cam 4 are described by the rotation angle φ = 0.
Degrees, 90 degrees, 180 degrees, and 270 degrees. FIG. 20 shows a change in the amount of lowering L of the cam driven member 45 with respect to the rotation angle as the cam plate 44 rotates. Note that FIG. 20 and FIG.
It shows the operating characteristics when the cam device is driven with no load (that is, not when the pump mechanism of the chemical solution container is driven by being incorporated into the automatic chemical solution supply device).

In the present embodiment, the cam plate 44
A predetermined portion (specifically, a portion in the range from point P1 to point P3) of the curve defining the peripheral shape of the cam plate 4
4 is a two-dimensional polar coordinate display having the rotation center Cs as the origin, and is formed by a spiral curve (so-called Archimedes spiral curve) defined by the equation r = aθ (r is a radial radius, θ is a declination, and a is a constant). ing. This Archimedes spiral curve has θ =
An angle position of 0 degree is set as a starting point (r = 0), and θ = 1
A range from 50 degrees (point P1) to θ = 307.5 degrees (point P3) is applied as a curve defining the peripheral shape of the cam plate 44.

As for the constant a in the Archimedes spiral curve r = aθ, the larger the constant a, the larger the outer circumference of the cam plate 44 and the greater the load on the electric motor 41. Further, the distance b between the outer periphery (point Po) of the cam plate 44 and the rotation center Cs at the rotation start point (rotation angle φ = 0 degrees) of the cam plate 44 is such that the larger the distance becomes, the smaller the descending amount of the cam driven member 45 becomes. It is. In the present embodiment, the pump mechanism 2 of the chemical solution container 20
For example, for a pushing amount of 3 mm, 18 mm [m
m] and the cam plate is made as compact as possible.
And b were set to a = 4.2 [mm] and b = 4.7 [mm].

In the peripheral shape of the cam plate 44, a portion SA defined by the Archimedes spiral curve
(That is, the curved portion including the point Po from the point P3 to the point P1) is smoothly combined by combining several curves having different radii of curvature so that the cam plate 44 can be smoothly rotated. It was formed as described above.
As described above, a predetermined portion (specifically, a portion in the range from point P1 to point P3) SA of the curve defining the peripheral shape is an Archimedes spiral having the rotation center Cs of the cam plate 44 as the origin. A cam plate 44 formed by a curve was set.

The portion SA defined by the Archimedes spiral curve in the peripheral portion of the cam plate 44 is as follows:
Since the moving speed v is constant (v = dr / dθ = a) with respect to the angle change of the point moving on the curve forming the peripheral shape, as can be clearly understood from FIG. The moving speed (that is, the inclination in the graph of FIG. 20) at the time of converting to the lowering operation of the member 45 is constant. Thereby, the descending speed of the cam follower 45 can be made constant over the stroke range corresponding to the predetermined portion SA defined by the Archimedes spiral curve in the peripheral portion of the cam plate 44, and the cam follower 45 The operating speed at the time of operating the manual pump mechanism 23 of the chemical liquid container 20 is maintained constant, and the discharge state of the chemical liquid can be made uniform and stable.

The stroke range corresponding to the predetermined portion SA is determined by the pressing head 2 which performs the pushing operation and the returning operation in conjunction with the reciprocating linear operation of the cam driven member 45.
5 includes at least a substantially middle point (point P2: rotation angle φ = 135 degrees) to a substantially end point (point P3: rotation angle φ = 262.5 degrees) in the pushing stroke of No. 5. Note that the end point of the pushing stroke (that is, at the time of the maximum pushing) is strictly set so as to correspond to the rotation angle φ = 264.5 degrees. Therefore, in the above-mentioned range which is important in evaluating the discharge state of the chemical solution, the moving speed when converting the rotational movement of the cam plate 44 into the reciprocating linear movement of the cam driven member 45 is kept constant. , And the discharge state of the chemical solution can be made uniform and stable.

Further, as can be clearly understood from FIGS. 20 and 21 to 24, the rotation angle φ of the cam plate 44 corresponding to the pressing operation period of the pressing head 25 is 264.5.
Degrees, which is greater than 180 degrees. In the case where a plurality of chemical liquid ejections are performed by one detection of the detection sensor 32, the pause period (waiting time) is shorter than the ejection period, so that the time loss can be reduced accordingly.

FIGS. 32 to 38 show the operating characteristics of a circular eccentric cam plate 144 as a comparative example and an automatic chemical liquid supply device incorporating the same. As shown in FIG. 32, in this comparative example, the peripheral shape of the cam plate 144 is a simple circle, and the axis Cs ′ (rotation center) of the rotating shaft 144s is offset (eccentric) from the center of the circle. ing. In the case of the cam plate 144, the movement (movement of the pressing head) of the cam follower 145 due to its rotation is non-uniform as shown in FIG.

When the cam plate 144 of this comparative example is used, the pushing operation period (rotation angle φ = 0 ° to φ = 1) in the operation of one reciprocation of the cam driven member 145 (one rotation of the cam plate 144). 180 degrees) and the return operation period (rotation angle φ = 180 degrees to φ = 360 degrees) are equal. Therefore, when the general circular eccentric cam plate 144 is compared with the cam plate 44 according to the present embodiment, the cam plate 44 according to the present embodiment is
The same work is performed at a larger rotation angle, so that the loads on the motor 41 and the reduction gear unit 42 are reduced, and the current consumption is also reduced.

FIGS. 34 to 37 show the cam plate 1 shown in FIG.
The state of sliding contact between the peripheral portion of the cam plate 144 and the inner surface 145d of the vertical wall of the cam driven member 145 and the vertical movement (downward movement) of the cam driven member 145 accompanying the rotation of the rotation 44 are represented by a rotation angle φ = 0 degrees. They are shown in the order of 90 degrees, 180 degrees and 270 degrees. In addition, the cam follower 145 in this comparative example
The slide guide 146 has exactly the same configuration as the cam driven member 45 and the slide guide 46 according to the present embodiment, and performs the same operation. In the case of the cam plate 144 of this comparative example, the cam plate
4 is always in sliding contact with the inner surface 145d of the vertical wall of the cam follower 145, so that even if the motor stops and the rotation of the cam plate 144 stops, the cam follower 145 is directly supported by the cam plate 144. You. Therefore, the above-mentioned fall prevention mechanism is unnecessary.

Next, the automatic chemical liquid supply device 1 incorporating the cam plate 44 according to the present embodiment (example of the present invention).
A comparison test was performed to compare the characteristics of the automatic chemical liquid supply device with the cam plate 144 according to the comparative example. This comparative test was performed under exactly the same conditions except for the cam plate. The outline of the test conditions is shown below.・ Power supply: 6 volts [V] (4 single alkaline batteries) ・ Reduction ratio of reduction gear unit: 1 / 60.75 ・ Chemical liquid container: with spray nozzle type manual pump ・ Chemical liquid: Hibiscol ・ Cam plate, cam driven Material of member and slide guide: All made of resin ・ Lubricant for sliding contact: Silicon grease

In this test, the motor load, voltage, current value, etc., during operation of the automatic chemical liquid supply device were measured. One example of the measurement results is shown in FIG. 25 (Example of the present invention) and FIG. 38 (Comparative example). Various characteristic values obtained based on this test were as follows. Average voltage (average value of initial 10 cycles) Example of the present invention: 5.854 [V] / Comparative example: 5.627
[V] Average current (average value of initial 10 cycles) Example of the present invention: 0.543 [A] / Comparative example: 0.705
[A] Maximum load (during the initial 10 cycles) Example of the present invention: 2.504 [kgf] / Comparative example: 2.40
8 [kgf] Current consumption for 100,000 cycles (calculated value based on data) Example of the present invention: 15908 [mAh] / Comparative example: 257
77 [mAh] ・ Pressing stroke time of the pressing head 25 Example of the present invention: 0.78 [sec] / Comparative example: 0.90 [sec]

As described above, in the embodiment of the present invention, the current consumption is smaller and the battery life is longer than in the comparative example. Further, the pressing stroke time of the pressing head 25 is shortened. Since the stroke lengths are the same, in other words, the pushing speed increases. In particular, when the chemical liquid is discharged in a spray state (a so-called spray pump) or when soap or the like is discharged in a foam state (a so-called forming pump), if the pushing speed is low, a good discharge state is obtained. However, in the examples of the present invention, it was found that a sufficient pushing speed can be secured.

By the way, the automatic chemical liquid supply device 1 can be used as a table mounting type device by mounting it on a flat place such as a table in the state shown in FIG.
As shown in FIG.
A tray 70 projecting substantially vertically forward can be attached to the tray 1. As shown in FIG. 28, in the automatic chemical liquid supply device 1, the case body 1 of the device case 10 is used.
A plurality of mounting holes 11k are provided on the back surface of the device 0 so that the device case 10 can be mounted on a wall and used as a wall-mounted device. In the case of this wall-mounted type, the tray 70 is attached as standard in order to enhance the convenience for the user. Hereinafter, this tray 70
A description will be given of a mounting structure for detachably mounting the device on the device case 10.

The tray 70 is more preferably made of resin, and has a concave receiving portion 71 at its front portion, as can be clearly seen from FIGS. 26 and 27. An attachment part 72 for attachment to the bottom side of the ten case bodies 11 is formed. A pair of guide pieces 73 is provided at substantially the center of the left and right side edges of the upper surface (mounting surface) 72a of the mounting portion 72. A locking hook 74 extending in the width direction is formed at a predetermined position in the front-rear direction of the mounting surface 72a. The locking hook 7
As shown in detail in FIG. 30 and FIG. 31, a base 74a extending substantially vertically upward and a locking portion 74b projecting substantially vertically from the tip side of the base 74a (ie, substantially parallel to the mounting surface 72a). Are formed in a substantially L-shape. More preferably, a small convex portion 74c having a predetermined height and projecting downward is provided at an appropriate position in the middle of the locking portion 74b.

On the other hand, the case body 1 of the device case 10
27 and FIG. 29, a tray attaching / detaching portion 60 having left and right side vertical walls 61, front and rear vertical walls 62, 63, and an intermediate vertical wall 64 extending in the left and right direction.
Is provided. Each of the above vertical walls 61, 62, 63, 64
Are formed to extend substantially vertically downward from the bottom surface 11b of the case body 11. The intermediate vertical wall 64 is located between the front vertical wall 62 and the rear vertical wall 63, and is disposed at a position corresponding to the locking hook 74 on the tray side. A slot portion 64h through which the locking portion 74b of the locking hook 74 can be inserted is formed in the intermediate vertical wall 64. In order to form the slot 64h, the rear vertical wall 63 is also provided with a slot 63h for die cutting.

Then, the tray 70 is moved to the case main body 11.
When attaching to the tray attaching / detaching portion 60, as shown in detail in FIG. 30 and FIG. 31, first, the attaching portion 72 of the tray 70 is positioned below the tray attaching / detaching portion 60 of the case body 11 (see FIG. 30). Locking portion 74b of locking hook 74
Through the slot portion 64h of the intermediate vertical wall 64. In this state, the front ends of the front and rear vertical walls 62 and 63 of the case body 11 face the mounting surface 72a of the tray 70 (see FIG. 31). In the width direction of the tray 70, the movement is regulated by the left and right guide pieces 73 being guided by the inner surfaces of the vertical walls 61 on the left and right sides of the tray attaching / detaching portion 60. The front and rear vertical walls 62 and 63
Is set to be longer than the height of the base 74a of the locking hook 74, and the movement and rotation of the tray 70 in the vertical direction are reliably restricted in the tray mounted state shown in FIG. .

The locking portion 74b is connected to the slot 64
More preferably, the insertion work is performed by lifting the locking hook 74 and slightly displacing the mounting surface 72a elastically upward. Therefore, FIG.
In the mounting state shown in FIG.
h and is urged downward by the elastic force of the mounting surface 72a, so that even if a horizontal force is applied, it does not accidentally fall out of the slot portion 64h.

Further, the locking portion 74b of the locking hook 74
A small convex portion 74c of a predetermined height protruding downward.
In the state where the locking portion 74b is inserted and locked in the slot portion 64h, the minute convex portion 74c is locked to the intermediate vertical wall 64 at the rear end side of the slot portion 64h. The part 74b is more reliably prevented from accidentally falling out of the slot part 64h.

The height of the minute projection 74c is determined by the tray 70.
When removing the lock from the case main body 11, the mounting surface 70a of the tray 70 is elastically displaced upward so as to lift the locking hook 74, and the locking portion 74b is relatively easily removed from the slot portion 64h of the intermediate vertical wall 64. It is set appropriately so that it can be removed. By pulling out the locking portion 74b from the slot portion 64h in this way, the tray 70 can be easily removed from the tray attaching / detaching portion 60 of the case body 11.

As described above, according to the present embodiment, the attachment / detachment of the tray 70 to / from the case main body 11 of the apparatus case 10 is easy, and therefore, for example, the automatic chemical liquid supply apparatus 1 is used as a wall-mounted type. Even the case body 1
The tray 70 can be removed while the tray 1 is fixed to the wall, so that the tray 70 can be easily cleaned or disinfected.

The present embodiment relates to a case in which a cam device provided with a cam plate in which a part of a curve defining a peripheral shape is formed by an Archimedes spiral curve is used by being incorporated in an automatic chemical liquid supply device. However, the above-described cam device is not limited to such a case, and may be applied to other devices or devices that are desired to convert at least a part of the rotational motion of the cam plate into linear motion at a constant speed. Can be done. Thus, the present invention is not limited to the above embodiments. Needless to say, various improvements or design changes can be made without departing from the scope of the invention.

[0067]

According to the first aspect of the present invention, the predetermined portion of the peripheral shape of the cam plate is expressed in two-dimensional polar coordinates with the origin being the rotation center of the cam plate. is a spiral curve (a so-called Archimedes spiral curve) defined by a declination and a is a constant, so that the above-mentioned predetermined portion of the peripheral portion of the cam plate moves on the curve forming the peripheral shape. The moving speed v with respect to the change in the angle of the point becomes constant (v = dr / dθ = a), and the moving speed at the time of converting the rotational movement of the cam plate into the linear movement of the cam driven member can be kept constant. .

Further, according to the second aspect of the present invention, the predetermined portion of the peripheral shape of the cam plate incorporated in the pump driving mechanism of the automatic chemical liquid supply device is displayed in two-dimensional polar coordinates with the rotation center of the cam plate as the origin. Since it is formed by a spiral curve (a so-called Archimedes spiral curve) defined by the equation r = aθ (r is a radial radius, θ is a declination, and a is a constant), the above-mentioned predetermined portion of the peripheral portion of the cam plate is formed. about,
The moving speed v with respect to the angle change of the point moving on the curve forming the peripheral shape becomes constant (v = dr / dθ = a),
It is possible to keep the moving speed constant when converting the rotational motion of the cam plate into the reciprocating linear motion of the cam driven member. Thereby, in the range corresponding to the predetermined portion of the peripheral portion of the cam plate, the operation speed at the time of operating the manual pump mechanism of the liquid medicine container via the cam driven member is maintained constant, and the discharge state of the liquid medicine is uniform. And stable.

Further, according to the third aspect of the present invention, basically the same effects as in the second aspect can be obtained. In particular, a cam plate peripheral portion corresponding to a range including at least a substantially middle to a substantially end point in a pushing stroke of a head portion performing a pushing operation and a returning operation in conjunction with a reciprocating linear movement of the cam driven member is the Archimedes spiral curve. It is formed with. Therefore, in the above-mentioned range which is important for evaluating the discharge state of the liquid medicine, the moving speed when converting the rotational movement of the cam plate into the reciprocating linear movement of the cam follower member is kept constant, whereby the pushing speed of the head portion is improved. Is maintained constant, and the discharge state of the chemical solution can be made uniform and stable.

Further, according to the fourth invention of the present application,
Basically, the same effects as those of the second invention can be obtained. In addition, the rotation angle of the cam plate corresponding to the pushing operation period of the head portion that performs the pushing operation and the returning operation in conjunction with the reciprocating linear operation of the cam driven member is larger than 180 degrees. Since the peripheral shape of the cam plate is set, the same work is performed at a larger rotation angle than in the case of a conventional general circular eccentric cam plate, and the load of the motor that applies a driving force to the cam plate is increased. In addition, current consumption can be reduced.

Further, according to the fifth invention of the present application,
Basically, the same effect as any one of the second to fourth inventions can be obtained. In addition, the cam follower performs a linear motion in the vertical direction.
When the rotation operation of the cam plate is stopped, a fall prevention mechanism is provided to prevent the cam driven member from falling due to its own weight, so that, for example, when replacing a chemical solution container, the rotation of the cam plate is stopped. Even in this state, the cam follower does not fall by its own weight.

Further, according to the sixth invention of the present application,
A latch having a base extending substantially vertically upward and a latch projecting substantially vertically rearward from the distal end of the base (that is, substantially parallel to the mounting surface) on a mounting surface at the rear of the tray. Hooks are provided, and when the tray is mounted on the bottom side of the case body, the locking portion of the locking hook provided on the mounting surface of the tray is connected to the middle vertical section provided on the bottom side of the case body. It is inserted into the slot of the wall and locked, and the tip of the front and rear vertical walls on the bottom side of the case body is opposed to the mounting surface of the tray. When the tray can be restricted and the tray is to be removed from the case body, the tray is pulled forward, the locking portion of the locking hook is pulled out of the slot of the intermediate vertical wall, and then the tray is moved downward. Thereby, it can be easily removed. That is, the tray can be easily attached to and detached from the case body. For example, in the case of a wall-mounted type, the tray can be removed while the case body is fixed to the wall, and the tray can be easily cleaned or disinfected. .

Further, according to the seventh invention of the present application,
Basically, the same effects as in the sixth aspect can be obtained. In addition, since a minute projection having a predetermined height is provided in the middle of the locking portion of the locking hook, the locking portion is inserted into the slot of the intermediate vertical wall. In the locked state, it is possible to prevent the locking portion from accidentally falling out of the slot portion. In this case, when removing the tray, the height of the minute convex portion is set so that the mounting surface of the tray is elastically displaced in the vertical direction so that the locking portion can be relatively easily removed from the slot portion of the intermediate vertical wall. Is done.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of an automatic chemical liquid supply device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a state where a front cover of the automatic chemical liquid supply device is opened.

FIG. 3 is an explanatory side view of a chemical solution container used by being housed in the automatic chemical solution supply device.

FIG. 4 is a block diagram for explaining an outline of an overall configuration of the automatic chemical liquid supply device.

FIG. 5 is an explanatory front view showing a main part of a pump drive mechanism of the automatic chemical liquid supply device.

FIG. 6 is an explanatory side view of a main part of the pump drive mechanism.

FIG. 7 is an explanatory front view of a cam driven member of the pump drive mechanism.

8 is a plan view of the cam follower, as viewed in the direction of arrows Y8-Y8 in FIG. 7;

9 is a side view of the cam follower, as viewed in the direction of arrows Y9-Y9 in FIG. 7;

FIG. 10 is an explanatory front view of a slide guide that guides a slide operation of the cam driven member.

FIG. 11 is a plan view of the slide guide, as viewed in the direction of arrows Y11-Y11 in FIG. 10;

12 is a side view of the slide guide, as viewed in the direction of arrows Y12-Y12 in FIG. 10;

FIG. 13 is an explanatory front view showing a state where the cam driven member is mounted on a slide guide.

FIG. 14 is an explanatory rear view showing a state where the cam driven member is mounted on a slide guide.

FIG. 15 is an explanatory bottom view showing a state in which the cam follower is mounted on a slide guide, as viewed in the direction of arrows Y15-Y15 in FIG. 13;

16 is an enlarged explanatory view of a portion Y16 in FIG.

FIG. 17 is an explanatory front view of a slide guide to which a cam driven member is mounted, showing another example of the cam driven member drop prevention mechanism.

FIG. 18 is an enlarged explanatory view of a Y18 part in FIG. 17;

FIG. 19 is an explanatory front view of the cam plate according to the present embodiment.

FIG. 20 is an explanatory view showing a stroke of a linear motion of a cam follower member with respect to a rotation angle of the cam plate.

FIG. 21 is a part of a series of explanatory views showing the lowering operation of the cam driven member by the rotation of the cam plate, and is a front explanatory view at the start of rotation of the cam plate (rotation angle is 0 degrees).

FIG. 22 is a part of a series of explanatory views showing the lowering operation of the cam driven member by the rotation of the cam plate, and is a front explanatory view when the rotation angle of the cam plate is 90 degrees.

FIG. 23 is a part of a series of explanatory views showing the lowering operation of the cam driven member by the rotation of the cam plate, and is a front explanatory view when the rotation angle of the cam plate is 180 degrees.

FIG. 24 is a part of a series of explanatory views showing the lowering operation of the cam driven member by the rotation of the cam plate, and is a front explanatory view when the rotation angle of the cam plate is 270 degrees.

FIG. 25 is a graph showing the operation characteristics of the automatic chemical liquid supply device according to the present embodiment.

FIG. 26 is an overall perspective view showing a tray mounted state of the automatic chemical liquid supply device according to the present embodiment.

FIG. 27 is an exploded perspective view of an apparatus case and a tray of the automatic chemical liquid supply device.

FIG. 28 is an explanatory rear view of the device case.

29 is a view in the direction of the arrow Y29-Y29 in FIG. 28, and is an explanatory bottom view of the device case. FIG.

FIG. 30 is an explanatory cross-sectional view of a main part of the case main body and the tray for describing a tray attaching operation of the apparatus case to the case main body.

FIG. 31 is an explanatory cross-sectional view of a main part showing a state where the tray is attached to the case main body.

FIG. 32 is an explanatory front view of a circular eccentric cam plate according to a conventional example.

FIG. 33 is an explanatory diagram showing a stroke of a linear motion of a cam follower member with respect to a rotation angle of a cam plate according to the conventional example.

FIG. 34 is a part of a series of explanatory views showing the descending operation of the cam follower member by the rotation of the cam plate according to the conventional example, and is a front explanatory view at the start of rotation of the cam plate (rotation angle is 0 degree). .

FIG. 35 is a part of a series of explanatory views showing a descending operation of a cam follower member by rotation of a cam plate according to the conventional example, and is a front explanatory view when the rotation angle of the cam plate is 90 degrees.

FIG. 36 is a part of a series of explanatory views showing the descending operation of the cam follower member by the rotation of the cam plate according to the conventional example, and is a front explanatory view when the rotation angle of the cam plate is 180 degrees.

FIG. 37 is a part of a series of explanatory views showing the descending operation of the cam follower member by the rotation of the cam plate according to the conventional example, and is a front explanatory view when the rotation angle of the cam plate is 270 degrees.

FIG. 38 is a graph showing operating characteristics of an automatic chemical liquid supply device according to a comparative example incorporating the above-described conventional cam plate.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Automatic chemical liquid supply apparatus 10 ... Device case 11 ... Case main body 11a ... Bottom of case main body 20 ... Chemical liquid container 23 ... Manual pump mechanism 25 ... Pressing head 30 ... Control unit 31 ... Power supply 32 ... Detection sensor 40 ... Pump drive mechanism 41 ... Electric motor 41a ... Electric motor output shaft 43 ... Cam device 44 ... Cam plate 45,55 ... Cam driven member 45d ... Cam driven member vertical wall inner surface 47 ... Spring 55e ... Cam driven member outer rib 56k ... Locking hook 60: tray attaching / detaching part of case body 62: front vertical wall 63: rear vertical wall 64: middle vertical wall 64h slot part 70: tray 72: mounting part 72a: mounting surface 74: locking hook 74a: base part 74b: engagement Stop portion 74c: minute projection Cs: rotation center of cam plate SA: Archimedes spiral curve at the periphery of cam plate Minute

Claims (7)

[Claims] A cam plate having a predetermined peripheral shape and a rotation center set at a predetermined position; and a cam driven member having a sliding contact portion capable of slidingly contacting the peripheral portion of the cam plate.
A cam device in which the cam follower member performs a linear motion in conjunction with a rotation operation of the cam plate, wherein a predetermined portion of a peripheral shape of the cam plate is displayed in two-dimensional polar coordinates with the rotation center as an origin. Wherein the cam device is formed by a spiral curve defined by a formula r = aθ (r is a radial radius, θ is a declination, and a is a constant). 2. A chemical solution container having a manual pump mechanism, a pump drive mechanism for driving the manual pump mechanism, a power supply unit for supplying drive power to the pump drive mechanism, and a detection for detecting a user's use operation. A sensor and a control unit that controls the operation of the pump drive mechanism in accordance with an output signal from the detection sensor. When the detection sensor detects a user's use operation, the pump drive mechanism controls the manual operation by the pump drive mechanism. An automatic chemical liquid supply device in which a pump mechanism is driven to automatically supply a chemical solution in the chemical solution container, wherein the pump drive mechanism includes an electric motor connected to the control unit, A cam plate connected to the output shaft of the motor, and a reciprocating linear motion interlocked with the rotation of the cam plate, the cam plate being slidably contacting the peripheral edge of the cam plate. A cam device having a cam driven member for driving the manual pump mechanism by performing the above operation. =
An automatic chemical liquid supply device characterized by being formed by a spiral curve defined by aθ (r is a radial radius, θ is a declination, and a is a constant). 3. The manual pump mechanism includes a head portion that performs a pushing operation and a returning operation in conjunction with a reciprocating linear operation of a cam follower member accompanying rotation of the cam plate. 3. The automatic chemical liquid supply device according to claim 2, wherein a peripheral portion of the cam plate corresponding to a region including at least a substantially middle point to a substantially end point in a stroke is formed by the spiral curve. 4. The manual pump mechanism has a head portion that performs a pushing operation and a returning operation in conjunction with a reciprocating linear operation of a cam follower member accompanying rotation of the cam plate, and pushes the head portion. The rotation angle of the cam plate corresponding to the operation period is larger than 180 degrees,
3. The automatic chemical liquid supply device according to claim 2, wherein the peripheral shape of the cam plate is set. 5. The cam driven member performs a vertical linear motion, and a drop prevention mechanism is provided for preventing the cam driven member from falling due to its own weight when the rotation of the cam plate is stopped. The automatic chemical solution supply device according to any one of claims 2 to 4, wherein the automatic chemical solution supply device is provided. 6. A chemical solution container having a manual pump mechanism, a pump drive mechanism for driving the manual pump mechanism, a power supply unit for supplying drive power to the pump drive mechanism, and a detection for detecting a user's use operation. A sensor and a control unit that controls the operation of the pump drive mechanism in accordance with an output signal from the detection sensor. When the detection sensor detects a user's use operation, the pump drive mechanism controls the manual operation by the pump drive mechanism. A tray mounting structure in which a pump mechanism is driven to detachably attach a tray projecting substantially vertically forward to a bottom surface side of a case body of an automatic chemical liquid supply device that is capable of automatically supplying a chemical liquid in the chemical liquid container. A mounting surface for the bottom surface of the case body is provided at a rear portion of the tray, and a predetermined portion of the mounting surface has a base portion extending substantially vertically upward, and a front end side of the base portion. A locking hook having a locking portion projecting substantially vertically is provided, while an intermediate vertical wall having a slot portion through which the locking portion of the locking hook can be inserted, on the bottom side of the case body, Front and rear vertical walls which are located in the middle front and rear and are vertically longer than the base of the locking hook are provided, respectively. When the tray is mounted on the bottom side of the case body, The locking portion of the stop hook is inserted and locked into the slot portion of the intermediate vertical wall, and the front ends of the front and rear vertical walls face the mounting surface of the tray. Automatic chemical liquid supply device. 7. The automatic chemical solution supply device according to claim 6, wherein a minute convex portion having a predetermined height and projecting in a vertical direction is provided in the middle of the locking portion of the locking hook.