JPH0244855Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a document shredding device equipped with an automatic paper feeding mechanism, and in particular, it is capable of feeding documents for shredding both manually and automatically. The present invention relates to a document shredding device equipped with a mechanism that can easily pull out a paper jam when it occurs.

[Conventional technology]

Conventionally, there are few document shredding devices equipped with an automatic paper feeding mechanism, and most document shredding devices have an automatic paper feeding device configured with a separate case placed above the document insertion slot of the document shredding device to insert documents. It fed paper by dropping it into the mouth. Utility Model Application No. 61-06212 filed earlier by the present applicant, ``Document shredding device with automatic paper feeding device,'' incorporates an automatic paper feeding mechanism into the document shredding device into the same housing, and drives the two devices mentioned above. By configuring the document shredding device to share a common source, the document shredding device is simplified, downsized, and easy to use.

This document shredding device uses a plurality of rollers to constantly feed the bottom surface of the document in the feeding direction, and finally feeds the document to a cutter section by pinching it with upper and lower rollers that rotate in the same direction. Regarding the rotation of the upper and lower rollers, the lower roller is rotationally driven, but the upper roller functions as a gate roller and rotates freely and presses the lower roller by a link mechanism.

[Problem that the invention attempts to solve]

However, the above-mentioned conventional document shredding device equipped with an automatic paper feeding mechanism has some improvements to make it easier to use. The first point is that there are two ways to feed paper into the document shredding device: when an automatic paper feeding mechanism is used, and when the operator manually inserts documents for shredding. There was a demand for paper feeding to be within the number of shredded sheets of the cutter in order to make automatic paper feeding more reliable while still making the paper feeding mechanism easy to use for manual paper feeding. Depending on the quality of the paper, pressure alone may not be sufficient to meet the requirements. The second point is that when the document shredding device is overloaded and the document is pushed back by the auto return function while paper is being fed and shredded, the automatic paper feed mechanism is always operated in the direction of feeding the paper. Therefore, there are cases where the pushed back document cannot be easily removed, and a solution to this problem has been sought.

The purpose of this invention is to provide a document shredding device equipped with an automatic paper feeding mechanism that can feed paper easily even when manually fed, yet more reliably automatically feeds paper, and that the document shredding device has an auto-return function when overloaded. An object of the present invention is to provide a document shredding device that can easily extract documents when working.

[Means for solving problems]

Means for solving the above problems includes a first electromagnetic clutch that is attached to the paper feed drive shaft of the automatic paper feed mechanism and connects and disconnects the paper feed drive shaft and the transmission shaft, and A gate roller that faces the roller and feeds the document by sandwiching the document; a second electromagnetic clutch that locks the gate roller when the gate roller is in contact and causes the transmission shaft to follow the rotation when the gate roller is disconnected; and overload detection means for detecting overload and disconnecting all of the electromagnetic clutches.

[Effect]

In this invention, the first electromagnetic clutch is in contact with the second electromagnetic clutch.
By disengaging the electromagnetic clutch, the gate roller is rotated accordingly, and the operation during manual paper feeding is made more efficient. On the other hand, the gate roller is locked by disconnecting the first electromagnetic clutch and connecting the second electromagnetic clutch, and by limiting the number of sheets fed above the gate roller, the number of sheets held can be reduced. Prevents feeding of paper that exceeds the shredding capacity of the holding cutter section. Further, by disengaging the first and second electromagnetic clutches by the overload detection means, the gate roller is set in a free state, making it easier to pull out the document at the time of overload, that is, during auto-return.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings. Fig. 1 is a side perspective view showing the configuration of the present invention with the side turned upside down, Fig. 2 is a side view of the main parts, and Fig. 3 shows the rotation direction of the paper feed roller of the automatic paper feed mechanism.
FIG. 4 is an external view of the document shredding device operation panel equipped with the present invention.

First, the configuration of the embodiment will be explained. As shown in FIGS. 1 and 2, paper feed roller shafts 3a' and 8 are mounted on the bottom surface of the document storage tray 10 of the automatic paper feed mechanism.
a is a paper feed drive shaft that rotates at a constant speed due to transmission from a drive source, and as shown in FIG.
The heads of the paper feed rubber rollers 8 and 9 are exposed on the top surface of the paper. One end of the paper feed roller shaft 3a' passes through the side surface of the tray 10, and an electromagnetic clutch 1 (hereinafter abbreviated as clutch) is attached thereto. clutch 1
supports the gear 3 inserted into the transmission shaft 3a. A gear 4 which meshes with the gear 3 is supported by the clutch 2 by a shaft 4a. The gear 4 transmits power to the idler gear 5, and the gear 6 meshes with the idler gear 5, which drives a gate roller 7 that regulates and presses the number of sheets to be fed during automatic sheet feeding. Electrical control of the clutches 1 and 2 is performed by a changeover switch 12 provided on the upper operation panel of the apparatus, as shown in FIG. In addition, overload detection means 1 of the document shredding device
Reference numeral 3 is provided in a motor as a drive source, and includes an overcurrent detection section in the main winding of the motor, and when an overload occurs, the detection section generates an overload signal. The operation of the present invention configured as described above will be explained.

The operation of the main parts of the present invention when documents are accumulated on the document accumulation tray 10 and automatic paper feeding is performed will be described. “Automatic paper feed” button on selector switch 12 “ON”
As a result, clutch 1 is powered off, and gear 3
is released and becomes a free rotation state, and clutch 2
When the power is connected, the gear 4 is locked, and the idler gear 5 and gate roller drive gear 6 are also locked so that they cannot rotate. The paper feeding rubber rollers 8 and 9 rotate in the direction shown in FIG. 3 due to the gear transmission as described above, but the gate roller 7 is locked.
An appropriate number of the accumulated documents are sent out by the paper feed rollers 8 and 9, and a regulated number of sheets are shredded by pressing the paper feed roller 8 with the gate roller 7 in a locked state. (not shown).

Next, the operation when feeding paper manually will be explained. When the "manual paper feed" button of the changeover switch 12 is turned on, the power to the clutch 1 is turned on.
Drive is transmitted to gear 3. Since the clutch 2 is powered off and the gear 4 is free to rotate, the drive of the gear 3 is transmitted and the document fed manually is rotated by the paper feed rollers 8 and 9 in the same manner as described above. The rotation of the gate roller 7 feeds it into the shredding cutter.

When the document shredding device exhibits an auto-return function due to an overload condition and the fed document is pushed back, the operation of the present invention is as follows. As shown in FIG. 4, the power supply for driving the clutch is cut off regardless of the control of the changeover switch 12 by the overload signal detected by the overcurrent detection unit 13, which is an overload detection means, and is attached to the motor of the drive source. . For this reason, clutches 1 and 2 release the drive transmission, and gear 3, gear 4,
Both gears 5 and 6 rotate freely, and gate roller 7 freely rotates in the direction A as shown in FIG. This makes it easy to manually pull out the document pushed back by the auto-return function from the gate roller 7.

With the configuration and operation described above, the automatic paper feed mechanism can also be used for manual paper feeding, and when the document shredding device is overloaded, the auto return function makes it easy to pull out documents that have been pushed back. be able to.

It goes without saying that the present invention is not limited to the above-mentioned embodiments, but can be applied in various ways when put into practice. For example, using the detected overload signal,
An external warning may be displayed.

[Effect of idea]

As described above, it is possible to ensure automatic paper feeding by the automatic paper feeding mechanism and also to enable manual paper feeding. Moreover, when an overload condition occurs in the document shredding device and a paper jam occurs, the document for shredding that is pushed back can be easily pulled out, making it possible to make the document shredding device very easy to use.

[Brief explanation of drawings]

Fig. 1 is an inverted side perspective view of the embodiment of the present invention, Fig. 2 is a side view of the main parts, Fig. 3 is a diagram showing the movement of the paper feed roller, and Fig. 4 is a diagram showing the document details. FIG. 3 is an external view of an operation panel of the disconnection device. Symbols in the diagram indicate the following: 1, 2
...Electromagnetic clutch, 3a...Transmission shaft, 3, 4, 5, 6
...Gear, 3a'...Paper feed drive shaft, 7...Gate roller, 8, 9...Paper feed roller, 10...Tray, 12
...changeover switch, 13...overload detection means.

Claims (1)

[Scope of utility model registration request] In a document shredding device equipped with an automatic paper feeding mechanism,
a first electromagnetic clutch that is attached to the paper feed drive shaft of the automatic paper feed mechanism and connects and disconnects the paper feed drive shaft and the transmission shaft; and a first electromagnetic clutch that faces the paper feed roller of the automatic paper feed mechanism to sandwich and feed the document. a second electromagnetic clutch that locks the gate roller when connected and causes the transmission shaft to follow the rotation when disconnected; and detects an overload of the document shredding device and disconnects all of the electromagnetic clutches. A document shredding device characterized in that it is equipped with an overload detection means.