JP2000046013A - Attachment mounting device in apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability when an attachment such as a sensor is mounted and the reproducibility of a mounting position in the case that the attachment is remounted. SOLUTION: This attachment mounting device has a mounting recessed part 21 arranged to fit a rod RD therein so as to fix the rod RD, a fixing part 11a comprising a cap screw 31 for retaining the rod RD in the mounting recessed part 21, a fitting part 23 arranged to fit the head part of a sensor SR1 therein, an engagement part comprising a projected groove 24 arranged to be extended along an axial direction so as to be engaged with a groove arranged in the sensor SR1 on the inner circumferential surface of the fitting part 23, and a screw 32 for fixing the sensor SR1 so that the sensor SR1 may not be moved along the axial direction in the inside of the fitting part 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for mounting an accessory such as a sensor for detecting a piston position in a hydraulic device such as a hydraulic cylinder or a pneumatic cylinder.

[0002]

2. Description of the Related Art Conventionally, various sensors for detecting a piston position of a hydraulic cylinder are known. Brackets 81 and 91 shown in FIGS. 9 and 10 are used as a device for mounting such a sensor.

In FIG. 9, a bracket 81 is made of, for example, an aluminum alloy, and has a flat portion 85 for mounting the sensor SR11 and a concave portion 82 formed so as to fit a tie rod RD. Sensor S
R11 is fixed to the flat portion 85 by one screw 84 that passes through a mounting hole provided in the mounting plate SRb. The bracket 81 has a tie rod RD
Are fitted, and the two set screws 83 are firmly pressed against the tie rod RD to be fixed.

In FIG. 10, a bracket 91 is provided.
Like the bracket 81, the flat part 95 for attaching the sensor SR12 and a concave part 92 formed so as to fit the tie rod RD are provided. The sensor SR12 passes through a mounting hole provided in the main body.
The screw 94 is fixed to the flat portion 95.
The bracket 91 is fixed by strongly pressing the two set screws 93 against the tie rod RD in a state where the tie rod RD is fitted into the concave portion 92.

In mounting these brackets 81 and 91 to the hydraulic cylinder for the first time, the sensor SR11 or 12 is first mounted on the brackets 81 and 91, and then the tie rod RD is inserted into the recesses 82 and 92.
Are fitted, and the set screws 83 and 93 are tightened while adjusting the position in the axial direction and the posture of the sensor SR11 or SR12 with respect to the cylinder tube CT.

Further, when the sensor SR11 or 12 is replaced or maintained after being mounted on the fluid pressure cylinder, the screws 84 or 94 are mounted while the brackets 81 and 91 are still attached to the fluid pressure cylinder. Loosen and remove sensor SR11 or SR12. When attaching the sensor SR11 or 12, the sensor SR11 or 12 is held with one hand, and the sensor SR11 or
With the mounting hole of No. 2 and the screw holes of the brackets 81 and 91 aligned, the screw 84 or 94 is
And insert the screw 84 or 94 into the mounting hole,
After that, the hand is changed to a screwdriver, and the screw 84 or 94 is tightened with the screwdriver.

[0007]

In the above-mentioned conventional brackets 81 and 91, the operation for aligning the mounting holes of the sensors SR11 or SR12 and the screws 84 or 9 are performed.
The operation of inserting the 4 into the mounting hole and tightening it must be performed continuously and simultaneously, resulting in poor workability. for that reason,
It takes a lot of time and effort to attach the sensor SR11 or the sensor SR12, and when inserting the screw 84 or 94 into the attachment hole, the screw 84 or 94 may fall and be lost. In particular, when the brackets 81 and 91 are mounted in a complicated narrow place, workability is further deteriorated.

The mounting hole for the sensor SR11 or SR12 is usually a stupid hole,
In many cases, the positioning accuracy of the sensor SR11 or the sensor SR12 relative to the sensor 91 is not good. Therefore, the sensor SR1
By replacing or reattaching 1 or 12 the sensor SR11 or 12 for the cylinder tube CT is replaced.
The position or posture of the may change from before,
Poor reproducibility.

For example, in the case of the bracket 81, FIG.
As shown in (1), a gap is left between the bracket 81 and the sensor SR11, or the gap changes. For this reason, there is a possibility that iron powder, chips or the like may enter the gap to cause a malfunction, or the position detected by the sensor SR11 may be changed.

In the case of the bracket 91, FIG.
As shown in the figure, the sensor SR12 is displaced with respect to the bracket 91, so that iron powder or chips enter the gap between the sensor SR12 and the cylinder tube CT and cause malfunction, or the detection by the sensor SR12. The position may change.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has an improved workability when attaching an accessory such as a sensor.
It is another object of the present invention to improve the reproducibility of the mounting position when the mounting is performed again.

[0012]

According to a first aspect of the present invention, there is provided an apparatus for fixing an outer peripheral surface of a cylinder tube by fixing to a rod provided along an axial direction near an outer peripheral surface of the cylinder tube. An attachment attachment device in an apparatus for attaching an accessory to a predetermined position of an attachment, wherein the attachment recess is provided so that the rod fits in for fixing to the rod, and the attachment A fixing portion formed of a set screw for pressing the rod in the concave portion, a fitting portion provided to fit a head of the accessory, and an inner peripheral surface of the fitting portion provided on the accessory. An engaging portion formed of a ridge or groove provided so as to extend along the axial direction of the rod so as to engage with the groove or the ridge, and the accessory is inside the fitting portion. Comprising a, a regulating member for fixing so as not to move along the axial direction.

According to a second aspect of the present invention, an axial length of the fitting portion is set to be equal to an axial length of the accessory. In the device according to the third aspect of the present invention, the regulating member is a screw that penetrates a hole provided in the accessory.

[0014] In the device according to the fourth aspect of the present invention, the regulating member is a screw that comes into contact with the surface of the accessory.

[0015]

FIG. 1 is a right side view showing a mounting device 11 according to the present invention, and FIG.
3 is a front view of the sensor SR1 attached to the attachment device 11, and FIG. 4 is a side view of the sensor SR1 as viewed from the left.

In these figures, a hydraulic cylinder CY
Is a cylinder tube CT, a cover CV for closing both end faces of the cylinder tube CT, four rods RD for fastening between the covers CV on both sides, and a cylinder tube CT.
It consists of a piston (not shown) that slides inside, a piston rod connected to the piston, and the like. A permanent magnet for operating the sensor SR1 is mounted on the piston to detect its stroke position. Such a hydraulic cylinder CY is known per se.

The mounting device 11 is formed by extruding an aluminum alloy and cutting it into an appropriate length, and by fixing the same to a rod RD, a sensor SR1 is provided at a predetermined position on the outer peripheral surface of the cylinder tube CT.
It is for attaching.

The mounting device 11 comprises a fixing portion 11a and a mounting portion 11b. The fixing portion 11a is provided with a rod R for fixing the mounting device 11 to the rod RD.
Mounting recesses 21, 2 provided so that D
Screw holes 22, 22, and holding screws 31, 3 screwed into these screw holes 22 to hold the rod RD.
Consists of one.

The mounting portion 11b includes a fitting portion 23, a ridge 2
4, 24, and a screw 32. The fitting portion 23 is formed to have a width substantially equal to the width of the head 42 of the sensor SR so that the head 42 of the sensor SR1 is just fitted.

The protrusions 24 are provided on both sides of the inner peripheral surface of the fitting portion 23 so as to extend along the axial direction so as to engage with the grooves 43 provided in the sensor SR1. An engaging portion is formed by the two ridges 24, 24.

The screw 32 passes through a hole 25 provided in the mounting portion 11b and is screwed into a screw hole 26. The screw 32, the hole 25, and the screw hole 26 constitute a restricting member for fixing the sensor SR1 so as not to move in the fitting portion 23 along the axial direction.

As shown in FIGS. 3 and 4, the sensor SR1 comprises a main body 41 having a casing made of synthetic resin and a head 42. On the head 42,
Grooves 43, 43 into which the ridges 24, 24 are fitted, arcuate grooves 44, into which a part of the screw 32 is engaged, and a plane portion 45 are formed.

Such a sensor SR1 has an arc groove 4
Since the axial movement is regulated by the engagement of a part of the screw 32 with the screw 4, the height of the head 42 is reduced as compared with the case where a hole through which the screw 32 is provided is provided, and the sensor SR
1 can be reduced in size and installation space can be reduced.

The width of the mounting device 11 is determined by the sensor S
It is the same as the width dimension of the head 42 of R1. Therefore, the grooves 43, 43 of the sensor SR1 are fitted into the ridges 24, 24 of the mounting device 11, and both end surfaces of the mounting portion 11b are sandwiched between fingers to be within the width. Sensor S to fit head 42
By setting R1, relative positioning between the mounting device 11 and the sensor SR1 is easily performed. After that, the sensor SR1 is attached by inserting the screw 32 into the hole 25, screwing it into the screw hole 26, and tightening.

Therefore, the mounting device 11 is
The sensor SR is attached to the mounting device 11 regardless of whether the sensor SR is mounted or not.
The operation when attaching the sensor SR is extremely easy, and the positioning of the sensor SR1 is easily and accurately performed. Therefore, the reproducibility of the mounting position when the sensor SR1 is mounted again is good.

The grooves 43 of the sensor SR1 are
Since the sensor SR1 is provided, the sensor SR1 can be fitted into the fitting portion 23 with the front and back reversed, whereby the lead-out direction of the lead wire of the sensor SR1 can be changed, and the degree of freedom of mounting the sensor SR1 can be changed. Becomes larger.

FIG. 5 shows a mounting device 12 according to another embodiment, and FIG. 6 is a front view of a sensor SR2 mounted on the mounting device 12. In these figures, the head 52 of the sensor SR2 has grooves 53 on both sides thereof.
Is provided, and a hole 54 is provided in a central portion thereof.
The grooves 53, 53 are provided with the ridges 24a, 24 of the mounting device 12.
a, and attached by screws 32 in a state where the alignment in the axial direction has been performed. In the example of the mounting device 12, although the height of the head 42 of the sensor SR2 is slightly larger than that of the sensor SR1,
It is mechanically strong and improves the positioning accuracy in the axial direction.

FIG. 7 is a view showing a mounting device 13 according to another embodiment. In FIG. 7, in the mounting device 13,
A fitting portion 23b, ridges 24b, 24 are attached to the mounting portion 11b.
b, and a screw hole 52 are provided. Sensor SR3
After being fitted into the fitting portion 23b and the ridges 24b, 24b, it is pressed downward by the screw 33 screwed into the screw hole 52, whereby the movement in the axial direction is regulated. In this case, it is desirable to form a recess in the head of the sensor SR3 so that the tip of the screw 33 contacts the head. Further, if the recess is made wider than the tip of the screw 33, the axial position of the sensor SR3 can be adjusted.

FIG. 8 is a view showing examples of various cross-sectional shapes of the ridge R and the groove G. 8A has a semicircular shape, and the groove G1 has a V-shape. 8B is a V-shape, and the groove G1 is also a V-shape. The ridge R3 in FIG. 8C has a semicircular shape, and the groove G3 has a rectangular shape. FIG.
The ridge R4 in (D) is rectangular, and the groove G4 is also rectangular.
Thus, any shape may be used as long as the sensor SR can be slid. The position of the groove G may be above, below, or at the same position as the hole with respect to the hole for attachment. Further, it may be located above, below, or at the center of the sensor SR. In addition, shapes other than those shown in the drawings, and combinations of the ridges R and the grooves G are possible. Ridge R or groove G
May be provided on either side of the sensor SR or the mounting devices 11 to 13, and the number thereof may be one, two, or three or more.

According to the above embodiment, the mounting device 1
The sensors 1 to 13 are engaged with the sensors SR by the ridges and the grooves. If only the mounting devices 11 to 13 are held, the sensors SR do not drop, so that the work of mounting them is easy. Also, the sensor SR is attached to the mounting device 11.
Since the work of positioning with respect to .about.13 and the work of tightening the screw can be performed independently, workability is improved. In addition, the sensor SR
Even if is attached, since the positioning in the axial direction is performed by manually aligning the edges of the sensor SR and the attachment devices 11 to 13 and can be temporarily fixed in that state,
After once releasing the hand from the sensor SR, the sensor SR can be fixed with a screw, and workability is good.

In the above-described embodiment, it is preferable that when the screw 32 is tightened, the sensor SR is not pressed. Instead of such a screw 32, a pin may be used. In addition, an uneven portion may be provided so that the sensor SR does not easily move in the axial direction.

In addition, the structure, shape, size, material, number, etc. of the whole or each part of the mounting devices 11 to 13 or the sensor SR can be appropriately changed in accordance with the gist of the present invention. The present invention is applicable to accumulators, valves, other hydraulic devices, and other devices in addition to the hydraulic cylinder CY, and can be applied when attaching various accessories other than the sensor SR.

[0033]

According to the present invention, it is possible to improve the workability when attaching an accessory such as a sensor, and the reproducibility of the attachment position when the accessory is remounted.

[Brief description of the drawings]

FIG. 1 is a right side view showing a mounting device according to the present invention.

FIG. 2 is a front view of the mounting device.

FIG. 3 is a front view of a sensor attached to the attachment device.

FIG. 4 is a side view of the sensor as viewed from the left.

FIG. 5 is a view showing a mounting device according to another embodiment.

FIG. 6 is a front view of a sensor attached to the attachment device.

FIG. 7 is a view showing a mounting device according to another embodiment.

FIG. 8 is a view showing examples of various cross-sectional shapes of a ridge and a groove.

FIG. 9 is a view showing a conventional mounting device.

FIG. 10 is a view showing a conventional mounting device.

[Description of Signs] 11, 12, 13 Mounting device 11a, 12a, 13a Fixing portion 11b, 12b, 13b Mounting portion 21 Mounting recess 22 Screw hole 23 Fitting portion 24, 24a, 24b Protrusion 43, 53 Groove 31 Holding screw 32 , 33 Screw (Regulation member) CY Fluid pressure cylinder (Equipment) CT Cylinder tube RD Rod SR, SR1, SR2, SR3 Sensor (Accessory)

Claims (4)

[Claims] An apparatus for attaching an accessory to a predetermined position on an outer peripheral surface of a cylinder tube by fixing to a rod provided along an axial direction near an outer peripheral surface of a cylinder tube. An attachment mounting device, comprising: a mounting recess provided to fit the rod in order to fix the rod to the rod; and a fixing unit including a set screw for pressing the rod in the mounting recess. A fitting portion provided so that a head of the accessory fits therein; and an inner peripheral surface of the fitting portion, wherein the rod or the like is engaged with a groove or a ridge provided in the accessory. An engaging portion formed of a ridge or a groove provided so as to extend along the axial direction, and fixing the accessory so as not to move along the axial direction in the fitting portion. A mounting device for an accessory in a device, comprising: 2. The attachment mounting device according to claim 1, wherein an axial length of the fitting portion is set to be equal to an axial length of the accessory. 3. The device for mounting an accessory in a device according to claim 1, wherein the restricting member is a screw penetrating a hole provided in the accessory. 4. A device for mounting an accessory in a device according to claim 1, wherein said regulating member is a screw that abuts on a surface of said accessory.