JPH0734044Y2 - Large capacity paper feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a large-capacity sheet feeding device mounted on a copying machine,
Especially in a two-door type paper feeder, a switch provided in a part of the power circuit of the drive motor is turned on by opening and closing the door.
Regarding the improvement of the mechanism for turning off.

(Prior Art) An upper door for paper supply that opens and closes the upper surface of the device and a lower door for paper supply that opens and closes the side surface (lower surface) of the device are hinge-joined to a large-capacity paper feeding device (LCT). The drive power source of the drive motor provided in the above is configured to be turned on on condition that both doors are closed.

That is, FIGS. 3 (a) and 3 (b) are external views of a two-door type large-capacity sheet feeding device, in which openings are formed on the upper surface and side surfaces of the casing of the apparatus 1, and each opening is formed individually. It is pivotally supported by an upper door 2 and a lower door 3 so as to be openable and closable.

This paper feeding device is mounted in the paper feeding portion of the copying machine 5 in the state shown in FIG.

As shown in FIG. 5, the sheet feeding device main body 1 has a space 6 for stacking and storing recording sheets, a tray support shaft 9 movably supported vertically along side walls 7 and 8, and a chain 10. It has a tray motor 11 and the like for transmitting a driving force to the tray support shaft 9.

FIG. 6 (a) is an actuator mechanism that operates when the upper and lower doors 2 and 3 are closed to turn on the door switch (driving power switch) 15 and turns off the door switch 15 when the doors 2 and 3 are opened. 16 is shown. Actuator mechanism
16 is the upper actuator piece 17 and the actuator SW18
And the front actuator piece 19 are rotatably pin-coupled to each other. The upper end of the upper actuator piece 17 is rotatably supported by the side wall 8 by the pin 20, and the other end is rotatably connected by the pin 21 to the upper end of the actuator SW18. Further, the lower end of the actuator SW18 is rotatably connected to the upper end of the front actuator piece 19 by a pin 22, while the lower end of the front actuator piece 19 is pivotally supported on the side wall 8 by a pin 23.

The pressing piece 2a of the upper door 2 pushes down the pressed piece 17a of the upper actuator piece 17 when the upper door 2 is closed in the arrow direction, while the pressing piece 3a of the lower door 3 closes the lower door 3 in the arrow direction. Sometimes the pressed piece of the lower actuator piece 19
Push in 19a. The positional relationship between the actuator SW18 and the door SW15 is set so that the actuator SW18 moves toward the door SW15 and turns on the switch when the pressed pieces 17a, 19a are pushed in by the pressing pieces 2a, 3a. There is.
Therefore, only when both doors 2 and 3 are closed
SW15 is turned on to turn on the power of the motor 11, and turned off when at least one door is opened to stop the moder 11.

However, such an actuator mechanism requires about 10 link mechanism parts, and it is not easy to adjust the power-on timing.

Further, FIG. 6B is a structural explanatory view of a hinge connecting portion between the upper door 2 and the side walls 7 and 8, and a hinge projection at one end of the door 2 is shown.
2b is rotatably supported by fitting in the recess 25 of the side wall. A recess 26 is formed in the upper edge of the side wall as a play when the door 2 is opened. Therefore, the upper door 2 is easily removed, and dust may enter the inside of the device through the recess 26.

(Object of the Invention) The present invention has been made in view of the above, and reduces the number of components of an actuator mechanism that activates a power supply that is turned on and off by opening and closing two doors, and easily adjusts the power-on timing. It is an object of the present invention to provide a large-capacity sheet feeding device that can prevent the upper door from falling out and dust from entering through a gap.

In order to achieve the above object, the present invention provides an upper door that forms an upper surface of a housing for accommodating recording paper and is hinged to the housing via a hinge protrusion that extends in the horizontal direction. A lower door that forms one side surface of the body and is hinged to the housing via a hinge protrusion, a paper feeding means for feeding the recording paper housed in the housing, and a driving means for the paper feeding means. In a large-capacity sheet feeding device including a drive motor, an operating piece supported so as to be vertically swingable around a support shaft provided on the other side surface of the housing, and the operating piece is attached in an upward direction. It has a urging means for urging and a switch for closing the power circuit of the drive motor when the projection provided on the lower door abuts, and the operating piece engages with the upper door when the upper door is closed. As a result, it swings downwards against the biasing means and When the upper door is opened, the protrusion provided on the lower door is displaced to a position that allows it to come into contact with the switch, and when the upper door is opened, the engagement with the upper door is released to urge it. When the lower door is closed, the protrusion provided on the lower door is displaced to a position at which it is prevented from coming into contact with the switch.

Hereinafter, a large-capacity sheet feeder of the present invention will be described in detail with reference to an embodiment shown in the accompanying drawings.

FIG. 1 is an explanatory view of a switch actuating mechanism which is an essential part of the present invention. One end of an actuating piece 31 is rotatably supported by a shaft 30 of a side wall 8 so that the actuating piece 31 is a torsion spring.
It is always urged upward by 32. Actuating piece 31
The guided piece 31a protruding from the horizontal direction projects into the guide opening 33 punched out in the side wall 8. The front end portion of the operating piece 31 is a sealing piece 35 that is bent outward, and this sealing piece 35 is formed on the front wall 36 of the side wall 8 when it is located above as shown by the solid line. While closing the communication opening 37, the communication opening 37 is opened when the communication opening 37 is descending downward as shown by the dotted line. The pressing protrusion 40 of the lower door 3 is formed at a position where it can project into the opening 37 when the door 3 rotates in the closing direction shown by the arrow. When the sealing piece 35 is in the lowered position indicated by the dotted line, the power switch 45 protruding from the communication opening 37 and located in the back of the opening 37 is turned on. On the contrary, when the sealing piece 35 is located above the solid line, it is blocked by the sealing piece 35 and cannot project from the opening 37. Therefore, the power switch 45 cannot be turned on.

The guided piece 31a protruding from the guide opening 33 is the upper door 2
Is in the movement locus for opening and closing, and is pushed downward when the door 2 is lowered and is in the closed state, the sealing piece 35 is lowered to the lowered position shown by the dotted line. When the door 2 is opened, the return force of the spring 32 causes the operating piece 31 to return to the solid line position.

Even if the lower door 3 is closed while the upper door 2 is open, the sealing piece 35 interferes and the lower door cannot move to the closed state.
It cannot be turned on. On the contrary, if only the upper door 2 is closed, the sealing piece 35 is located at the position avoiding the opening 37, so that the lower door can be closed and the switch 45 can be turned on.

By configuring in this way, it is possible to turn on the power switch with the minimum required number of parts at a low cost while maintaining safety, without the need for a link mechanism composed of many parts like the conventional actuator mechanism. OFF operation can be realized.

The front wall 36 may be separate from the side wall, or the front wall may be absent.

The upper door 2 is made of a material having durability against a high number of bending and stretching movements, such as polypropylene, and the hinge portion at the center of opening and closing is formed by the groove portion 50. Reference numeral 51 is a portion fixed on the housing.

The groove portion 50 is set in a shape that does not allow the opening angle of the door 2 to be 90 ° or more, for example. In this way, the force in the opening direction can be released to close it by its own weight.

Since there is no gap in the upper door 2 as in the conventional case, there is no risk that dust or the like will enter the inside of the apparatus. Moreover, it is possible to prevent the door from being easily detached like the conventional hinge.

In the above embodiment, the operating piece is configured to rotate downward about the shaft 30 when the upper door is closed, but it may be configured to rotate or move laterally or upward. As described above, in the present embodiment, in the two-door type large-capacity sheet feeding device, the operating piece that operates in conjunction with the closing of the upper door is provided, and the operation of the operating piece causes the communication opening to the power switch. When the lower door is closed and the lower door is closed, the pressing protrusion of the lower door protrudes from the open communication opening to turn on the power switch, so the switch can be turned on and off for safety while reducing the number of parts. Can be realized.

Moreover, since the upper door is made of an integral flexible material and can be opened and closed around the groove-shaped hinge, there is no need to form a gap for opening and closing the door, and as a result, dust is prevented from entering the interior. Can be prevented.

Although there is a conventional one-door type large-volume paper feeder, in the one-door type paper feeder, the cost of the tray elevating mechanism is high. I have no choice. The present invention intends to further reduce the cost in such a two-door type.

In particular, it is considered that the mass paper feeder is merely a large-sized copy paper replenishing box for the user. Therefore, the cost of LCT itself should be as low as possible. The characteristic effect of the present invention lies in the fact that the mechanism is simplified without degrading the performance.

(Effect of the Invention) As described above, according to the present invention, the number of components of the actuator mechanism that operates the power supply that is turned on and off by opening and closing two doors is reduced, and the timing of turning on the power supply is facilitated. It is possible to prevent the upper door from falling off and dust from entering through the gap.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a main part of an embodiment of the present invention, FIG. 2 is an explanatory view of a configuration of an upper door, and FIGS. 3 (a) and 3 (b) are external views of a conventional large-capacity sheet feeding device. FIG. 4 is an explanatory view showing a state in which a conventional paper feeding device is attached to a copying machine, FIG. 5 is an explanatory view of an internal configuration of the conventional paper feeding device, and FIGS. 6 (a) and 6 (b) are conventional paper feeding devices. It is a structure explanatory view of the actuator mechanism of a device, and a structural explanatory view of the hinge part of an upper door. 2 ... Top door, 3 ... Bottom 7, 8 ... Door side wall, 30 ... Shaft 31 ... Actuating piece, 31a ... Guided piece 33 ... Guide opening, 35 ... Sealing piece 36 ... Front Wall, 37 ... communication opening 40 ... pressing protrusion, 45 ... power switch 50 ... groove hinge

Claims (1)

[Scope of utility model registration request] 1. An upper door which forms an upper surface of a housing for accommodating recording paper and which is hinge-connected to the housing via a hinge protrusion extending in a horizontal direction, and one side surface of the housing and a hinge. A large door including a lower door hingedly connected to the housing via a protrusion, a paper feeding means for feeding the recording paper housed in the housing, and a drive motor for driving the paper feeding means. In the capacity sheet feeding device, an actuating piece supported so as to be vertically swingable about a support shaft provided on the other side surface of the housing, and a biasing means for biasing the actuating piece in an upward direction. A switch for closing the power supply circuit of the drive motor by abutting a protrusion provided on the lower door, wherein the operating piece engages with the upper door when the upper door is closed. The lower part is rocked downward against the biasing means. (A) The protrusion provided on the lower door is displaced to a position allowing the switch to come into contact with the closing operation of (a), and the engagement with the upper door is released when the upper door is opened. Is urged by the urging means to swing upward and be displaced to a position that prevents the protrusion provided on the lower door from coming into contact with the switch when the lower door is closed. Large-capacity paper feeder characterized by