JPS6082540A - Copier - Google Patents

Abstract

PURPOSE:To fix securely the position of a paper supply unit provided telescopically in an unit body by providing a lock machanism consisting of swing levers engaging each other on the paper supply unit side and the body side respectively. CONSTITUTION:A paper supply unit 5 capable of attaching paper supply cassettes 3, 4 on two upper and lower stages is suspended from left and right expansible rails 13, 13 to be withdrawn in the counter-paper-supply direction, and a lock mechanism 19 to lock the paper supply unit 5 to the paper supply position is constituted from swing levers 20, 23 engageable with each other. The swing lever 20 is formed with a handle 20' integral therewith, supported by the paper supply unit 5 through a shaft rod 26 and urged by a spring 27 in the direction of projecting a pair of pins 21 upward. Also, the swing lever 23 is formed with a hook 22 integral therewith, supported pivotally by a pin 29 on both sides of a member 28 fixed to the upper surface of a space in which the paper supply unit of a main body 1 is installed and urged to depress the hook 22 side by a spring 30.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a copying machine equipped with a locking mechanism that can lock a drawer-type paper feed unit 1- without play.

[Conventional technology]

Modern copying machines are equipped with paper feed units that can be equipped with multiple paper feed power centers to enable easy switching between paper sizes of different sizes. However, in the case of such a single feed paper feeder, the paper is sent out from the upper cassette using the first picked up part number, and then sent to the second paper feed grinding part (register roller) G.
The paper path leading to this point is longer than the path of the paper pulled out from the lower cassette, so there is a higher possibility of jamming within one path, and the trailing edge of jammed paper may The evening of the first paper feeding meeting (not left in the shell + l,
In many cases, it is not possible to remove the cassette and retrieve the paper.

Conventionally, in order to remove jammed paper from the paper path that communicates with the upper drawer 7, the outer panel of the customer path was divided into upper and lower halves so that the lower panel could be opened, and the paper feed unit was moved to the paper feed position. It was well known that the paper could be pulled out in the opposite direction. Making this paper feed unit pull-out type is advantageous in that the user can easily remove jammed paper, but the paper feed unit is not included in the locking mechanism that locks the paper feed unit and throat in the paper feed position. It is necessary to push it in and lock it automatically, but since the distance between the fulcrum and the point of action cannot be kept long, some looseness is unavoidable.

Paper feeding position could fluctuate 1 Originally, the paper feeding unit feeds paper in synchronization with the toner image formed on the photoreceptor drum, and fluctuations in the paper feeding position are caused by changes in the transfer position. This caused a discrepancy.

[Purpose and structure of the invention]

The present invention is intended to solve the above-mentioned problem in a copying machine in which the paper feeding unit can be pulled out in a direction opposite to the paper feeding direction with respect to the main body of the apparatus.

A swinging lever with a locking means that can be engaged with each other is provided on the paper feed unit side and the main body side, and when the lock is released, the swing lever on the paper feed unit side swings in conjunction with the handle. Just as the swinging lever on the main body side acts on the paper feed unit and the swinging lever on the upper side to swing it, by separating the levers that swing when unlocking and when locking, it is possible to create clearance between the two. It is an object of the present invention to provide a copying device that is made as small as possible so that the paper feed unit does not wobble at the paper feed position, and that is equipped with a lock mechanism that allows the paper feed unit to be easily attached and detached. .

〔Example〕

Next, the present invention will be described based on an embodiment shown in the accompanying drawings.

Reference numeral 1 indicates the main body of the copying machine placed on a pedestal 2.

(referred to as main body), the main body 1 has two paper feeding power cents 3.4
As shown in the third figure, the paper feeding unit 5 is provided with a paper feeding unit 5 to which a paper feeding unit 3.4 can be attached. - Paper feeding sections 6, 7, a path 8.9 for the paper sent out in the first paper picking section 6.7, and a common second path 8.9 for feeding paper to a transfer section (image forming section, not shown). Paper picking section (register roller) 1
0. Further, as shown in the second figure, the paper feeding unit 5 has telescopic rails 13.1 whose base ends are fixed to the rising pieces 12.12 on both sides of the receiving plate 11 fixed to the bottom plate of the main body 1.
A stepped protrusion (not shown) protruding from the inner surface of the telescopic side of 3 is suspended via a groove (not shown) formed at the lower edge of both side plates, and the rail 13. It can be pulled out in the paper feeding direction.

This telescopic rail 13. It is desirable that f3 has enough expansion/contraction and strength to pull out the entire sheet feeding unit 5 to a position where it is completely exposed outside the main body 1.

Reference numeral 16 denotes an outer plate of the paper path 8 that communicates with the upper cassette 3 of the paper feed unit 5. The outer plate 16 is divided into upper and lower plates 16a and 16b as shown in the fourth figure, and the upper plate 12a is connected to the upper end hinge portion 17. It can be opened upwardly through the opening as shown by the two-dot chain line in FIG. 3, forming a mechanism for removing jammed paper.

In this case, it is possible to make the lower plate 1'6b side open, but the opening area cannot be secured sufficiently due to the installation position of the second paper pick-up section 10.

In this embodiment, the upper plate 16a is made openable.

Of course, when opening the upper slope 16a upward, if you simply stack the upper plate on the lower plate, there is a risk that the leading edge of the paper will hit the edge of the lower plate, and if you butt the upper plates together, there will be a gap between the edges. There is a risk that the leading edge of the paper may be inserted. Therefore, in this embodiment, the abutting portions of the upper and lower plates are configured as comb teeth 18a and 18b, and the teeth are engaged with each other, and the tip of each tooth 18b of the lower plate is bent outward. The stopper 15 of the upper plate 16a fixed to the side plate of the paper feeding unit 5 is a spring that biases the upper plate 16a in the closing direction (in the direction of pressing against the stopper 14).

Reference numeral 19 denotes a locking mechanism for locking the paper feeding unit 5 in the paper feeding position.As shown in FIGS.
A swing lever 23.23 having a hook 22.22 that engages with a pin 21.21 provided at the swing end of the swing lever 20 is provided on the 3 body side. The swinging lever 20 on the paper feeding unit side is supported by a shaft rod 2G which is inserted through rising pieces 25 and 25 which are opposed to each other by sandwiching a notch 24 provided in the upper frame of the paper feeding unit 5.

Further, the swinging end side provided with the bins 21, 21 is urged by a spring 27 to move upward. and bin 21.2
1 maintains the same level as the shaft rod 26 in the normal state (see Figures 6A and C), while the swing lever 23 on the main body side of 1
, 23 is the stay 2 on the top surface of the paper feed unit installation space of the main body l.
The hook 22 is attached to both sides of a member 28 fixed to the hook 7 via hinge pins 29, and is urged by a spring 3o to push down the hook 22 side. In this case, the swing lever 23 on the second main body side is then α11°, +23' is the stay 2
7, so it remains almost horizontal.

Reference numeral 31 denotes a positioning bin when the paper feeding unit 5 is stored in the paper feeding position. 5
It can fit into the hole 34 provided opposite to the inner surface plate 33 of.

Reference numeral 35 denotes connectors provided on the wall plate 32 and the inner surface plate 33 of the paper feeding unit 5, respectively, and are positioned so that the paper feeding units 5 can be connected to each other at the paper feeding position.

Reference numeral 36 denotes a front cover of the main body 1, and the front cover 37 engages with the side edge of the exterior cover 37 of the sheet feeding unit 5 from the outside when the front cover 37 is closed. Therefore, the paper feeding unit 5 cannot be pulled out unless the front cover is opened, and conversely, the front cover 37 is prevented from closing unless the paper feeding unit 5 is properly stored in the paper feeding position, and the copying operation is not started. It has become.

Next, the operation of the above embodiment will be described.

If you need to pull out the paper feed unit to remove jammed paper, etc., first pull out the paper feed unit.

Open the front cover 36 of the main body 1. Next, put your hand on the handle 20' of the swing lever 20 on the paper feed unit side and press the arrow a.
(see Fig. 6B), the swinging end of the swinging lever 20 swings about the shaft 26 against the spring 27, and the bottle 21 provided at the swinging end and the main body The rocking lever 23 on the side is unlocked from the hook 22, so if you pull it toward you (in the direction of the arrow) in that state, the paper feed unit will ride on the telescopic rail and be pulled out (see Figure 2). ),
To return the paper feed unit 5 from the pull-out position to the paper feed position after completing the desired work, push it in the direction of arrow C as shown in Figure 6C.
The pin 21 of the movable lever 20 comes into contact with the inclined end of the hook 22 of the swing lever 23 on the main body side. in this case.

The swinging lever 20 on the paper feed unit side has the bin 21 attached to the shaft lever 26.
Since it does not swing even if a horizontal force is applied to the bottle 21, the swing lever 23 on the main body side moves against the spring 30 by the cam action at the end of the hook 22, Swings in the d direction. However, the paper feed unit 5
When the fifth paper position is reached, that is, when the bin 21 passes the inclined end of the hook 22, it is swung in the locking direction by the action of the spring 30, resulting in the state shown in FIG.

(Effects of the Invention) As described above, according to the present invention, in a copying machine in which the paper feed unit is of a pull-out type in the direction opposite to the paper feed with respect to the main body, the paper feed unit side and one main body side are mutually connected. A swinging lever with a locking means that can be engaged is provided, and when the lock is released, the swinging lever on the paper feed unit side swings in conjunction with the handle, and when the lock is released, the swinging lever on the main body side swings in conjunction with the handle. It is characterized by a locking mechanism configured to swing by acting on a swinging lever, so the lever that swings when unlocking and when locking is released is separate, allowing for clearance between them. can be made as small as possible. Therefore, when the paper feeding unit is locked at the paper feeding position, there is no wobbling, and the paper feeding unit can be pulled out from the paper feeding position in the opposite direction to remove jammed paper from the paper path. When you return the paper feed unit to the paper feed position after completing the desired task, the paper feed position does not change.
This has the excellent effect of always ensuring the correct position.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is an external perspective view of the multi-lipped device, Fig. 2 is a perspective view with the paper feed unit pulled out, and Fig. 3 is a sectional view of the paper feed unit. FIG. 4 is a perspective view of the jammed paper removal mechanism, FIG. 5 is a perspective view of the locking mechanism, and FIGS. 6A, B, and C are sectional views showing the operation of the locking mechanism. 1-Copying device main body 3, 4-Paper feed cassette 5--Paper feed unit) 12-Receiver & J plate 13--Extendable rail 20
．． 23-Swinging lever 21--Pin 22-Hook Patent applicant Konishiroku Photo Industry Co., Ltd.

Claims (1)

[Claims] In a copying machine in which the paper feed unit is a pull-out type in a direction opposite to the paper feed direction with respect to the main body of the apparatus, a rocking lever having a locking means that can be engaged with each other is provided on the paper feed unit side and one main body side to release the lock. At times, the swing lever on the paper feed unit side swings in conjunction with the handle, and when locked, the swing lever on the main body acts on the swing lever on the paper feed unit side to swing. Characteristic copying device.