JPS6036575B2 - Automatic opening/closing document crimping device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for pressing and reloading a document in a copying machine, etc., which presses and holds a reworked document on a document reloading section.

Conventional copy machines and the like rely on human power to open and close original documents.

Therefore, the operator is required to open and close the document pressure signboard each time a document is stacked or each time a document is replaced. This opening/closing operation is extremely troublesome for the operator, especially when there are a large number of documents. It is also common for users to sometimes forget to leave their originals on the original document tray.

In view of this, automatic opening and closing of the original pressure bonding layer is required, but there are major obstacles in realizing this.

It is quite possible that the operator will manually open and close the manuscript pressure signboard in an emergency if there is a mistake in posting the manuscript, if there is an urgent need, or if there is an erroneous operation. It is necessary to balance this consideration with the automatic opening/closing operation under normal conditions. Failure to do so will not only greatly reduce operability, but also lead to damage to the automatic opening/closing device. Furthermore, if the operator manually opens or closes the door in an emergency,
The position at which the pressure plate is opened is completely random, and even when it is closed, the opening position from which it is closed is not determined at all. Under these conditions, no matter which open position the pressure plate is manually placed, the subsequent automatic opening/closing operation will not be affected and the pressure plate will be able to occupy the predetermined open or closed position. You need to be able to do it. In the middle of the opening/closing drive transmission system of the document pressure signboard, the present invention provides
By arranging a constant torque transmission element that slips when a torque exceeding a predetermined level is applied, and by arranging a pressure plate position detection means downstream of the constant torque transmission element in relation to the flow of force transmission, it is possible to eliminate the problem of overcoming obstacles. The present invention provides an automatically opening/closing document pressure bonding layer that overcomes the above problems and has excellent operability. Another object of the present invention is to provide an apparatus that is capable of pressing even thick originals such as books against the original calendar section with a uniform force using an original pressing member.

The present invention will be described in detail below with reference to the drawings.

FIG. 1 is a perspective view showing an example in which the apparatus of the present invention is applied to a copying machine. The automatic opening/closing original pressure bonding layer 3 of the present invention is disposed in the original cover layer portion of the top cover 2 of the copying machine main body 1, and opens and closes in the direction of the arrow. In FIG. 1, numeral 4 indicates an operating section, 5 indicates a paper feed cassette, and 6 indicates a pseudo paper tray. FIG. 2 is a perspective view showing the main points of the device of the present invention.

The automatic opening/closing original pressure bonding layer 3 of the present invention has a cushion member 8 and a white layer 9 on the inside of the rigid pressure signboard 7, and the document is pressure bonded at this portion. Brackets 10 and 11 are fixedly installed at both rear ends of the pressure board 7, respectively. Bracket 10
One end 10a is rotatably supported by rattan 12 with respect to a support base 14 via a bearing 13. One end 11a of the other bracket 11 is fixed to a shaft 17 rotatably supported on a support base 14 via bearings 15 and 16. A slit disk 18 for detecting the position of the pressure plate 7 is fixed to the other end of the shaft 17. Further, a drive shaft 201 of the motor unit 19 is supported by a motor mounting plate (not shown) that is integrally fixed to the support base 14.
A gear 21 is fixed here. and bearings 22, 23
A gear 25 is fixed to one end of a bearing 24 which is rotatably supported on the support base 14 via a gear 21.
It meshes with the. The shaft 17 and shaft 24 are connected to a coupling 26
are interconnected by. Furthermore, a pair of pillars 27 are fixed to the support base 14.

The pillar 27 is connected to the copying machine main body 1 as will be explained later with reference to FIG.
The guide support member 5 provided on the side is supported in formation by the river, and as described later, the automatic opening/closing original pressure bonding thin plate 3 of the present invention is raised and lowered with respect to the copying machine main body 1 integrally with its opening/closing drive source 19. This is a possible configuration. Figure 3 shows coupling 2
It is a partial sectional view showing the main points of the 6th part.

A slit disk 18 is attached to the shaft 17 supported by the bearing 16.
and disk 28 are fixed by setscrews 29, 3. The slit disk 18 is provided with slits 18a, 18 corresponding to the open and closed positions of the pressure plate. A known photointerrupter 33 is disposed coaxially with the center of the slit 18a, and includes a light emitting element 31 and a light receiving element 32 facing each other with a constant interval. Also disc 2
8 has a lining 34 fixed thereto. One side bearing 22
A disc 35 is attached to one end of the pith 24 supported by the disc 28, facing the disc 28. A lining 36 is fixed to the disc 35, and a long hole 35b is provided in the boss portion 35c. The pin 37 fixed to the shaft 24 and the elongated hole 35b are aligned, and the disc 35 can be moved in the axial direction within the range of the elongated notch 36b. A ring 38 is further fixed to the shaft 24 by a set screw 39. A compression coil spring 40 is attached between the ring 38 and the disc 35, and presses the disc 35 against the disc 28. A gear 25 is fixed to the other end of the shaft 24 with a set screw 41. Next, the operation of the automatic opening/closing original pressure bonding layer according to the present invention will be explained.

In the initial state, the pressure plate is in an open state as shown in FIG. The light is in a state of being incident on the light emitting element 32. That is, the photo interrupter 33 is in the ON state. After the operator prints the original on the original printing surface, the operator operates the operation unit 4 to set the desired number of sheets and inputs a print signal, which is input to the motor unit 19, and its output shaft 20 moves in the direction of arrow A. Start rotating. That is, gear 21 is driven in the direction of arrow A. Therefore, due to the meshing of the gear 25, the shaft 24 and the disk 35 are rotated as a unit in the direction opposite to the arrow A. The rotation of the disc 35 is transmitted directly to the disc 28 via the linings 36, 34, usually without slipping.
Therefore, the shaft 17 rotates and the slit disk 18 also rotates. Then, the slit disk 18a on the slit disk 18 is removed from the light of the photo interrupter 33, and the photo interrupter 33 is turned off. Also, the shaft 17 has a placket 1.
The pressure board 7 is fixed via the shaft 1, and the pressure board 7 is fixed to the shaft 1.
7 and shaft 12 as centers of rotation, it rotates from the open position to the closed position.

At the same time that the pressing board 7 firmly presses the manuscript against the printing surface, the slit disc 18a' on the slit disc 18 provided corresponding to the closed position of the pressing board 7 presses the manuscript firmly against the printing surface. The photointerrupter 33 corresponds to the optical range of the photointerrupter 33.
It becomes N state. The output signal of the photointerrupter 33 stops the input to the motor unit 19, and the output shaft 2
0 stops its rotation. In this way, the pressure plate 7 is maintained in the closed position. If the document ○ is a thick document such as a book, the pressure plate 7 hits the document 0 before coming to the horizontal closed position.

In this case, as shown in FIG. 4, as the press plate 7 continues to rotate, the column 27 is guided along the support member 5 by the reaction force of pressing the document 0, and the press plate 7 including the motor unit 19 is
The part integrally formed with the support base 14 automatically rises and stops when the pressure board 7 reaches the closed position where it is approximately horizontal. That is, even if a thick original is used, it can be pressed with a uniform force against the surface of the manuscript podium by a pressing board, so that the surface to be copied can be brought into close contact with the surface of the manuscript podium. When the pressure plate 7 is thus closed, the known copying process is repeated, and at the same time as the exposure process for the last set of sheets is completed, a signal is issued by appropriate means.

Then, the motor unit 19 is inputted again, and its output shaft 20 starts rotating in the direction of arrow B. Therefore, pressure signboard 7
rotates from its closed position to its open position. Then, the slit 18a corresponding to the open position of the pressure plate 7 again coincides with the light range of the photo interrupter 33 and turns on, at the same time stopping its rotation. In this way, the pressure plate 7 is restored to its initial open position. The above series of operations is repeated every time a manuscript is exchanged or published. The above is a normal opening/closing operation, but next, a case where the document pressure signboard is manually opened/closed in an emergency by the operator will be described with reference to FIG.

The pressure signboard 7 is moved by the operator's manual operation, and the disc 35
When a relative rotational speed difference occurs between the disk 35 and the disk 28, the contact surfaces of the lining 36 fixed to the disk 35 and the lining 34 fixed to the disk 28 slip against each other, causing the rotational speed difference. It absorbs. That is, since the discs 35 and 28 are configured to slip when a torque of a certain magnitude or more is applied, they constitute the opening/closing drive transmission system for the pressure signboard 7, and no strain is caused to any element member. The input control of the motor unit 19, which is the opening/closing driving source, is performed by the slits 18a, 18a' on the slit disk 18, which rotates integrally with the pressure plate 7.
Therefore, no matter when the manual operation is switched to the automatic opening/closing operation, the back pressure signboard 7 that has rotated to a predetermined open position or closed position always remains stationary. That is, the open and closed positions of the document pressure signboard 7 are always constant. Next, another embodiment of the coupling 26 will be described with reference to FIG.

A clutch plate 42 is fixed to the shaft 17 with a set screw 43. Another clutch plate 44 is fixed to one end of the shaft 24 by a set screw 45. A clutch plate 46 facing the clutch plate 42 and a clutch plate 47 facing the clutch plate 44 are disposed between the clutch plates 42 and 44. The clutch plates 46 and 47 both have concave and convex portions on their boss portions, and since these concave and convex portions are iron-coupled with each other, they rotate integrally and rotate independently of each other in all directions on the shaft 17. It is possible to move to A compression coil spring 48 is disposed between the clutch plates 46 and 47, and presses the clutch plate 46 against the clutch plate 42 and the clutch plate 47 against the clutch plate 44, respectively. Two clutch plate pairs 42,4
The contact surfaces of 6, 44, and 47 are in mesh with each other in the form of mirror teeth, and can slip only in one direction of rotation. Both clutch plates pair 4
2, 46 and 44, 47 have sawtooth shapes so that they can slip and rotate in opposite directions. All other numbers are the same as those used in FIG. In this embodiment, when the document pressure signboard is suddenly opened by manual operation by the operator, the clutch plate pair 44, 47
A slip occurs between the pair of clutch plates 42 and 46, and when the clutch plates are suddenly closed, a slip occurs between the pair of clutch plates 42 and 46. As described above, according to the present invention, a constant torque transmission element is disposed in the middle of the opening/closing drive transmission system for the document pressure signboard, and a position detection means for the pressure signboard is disposed downstream of the constant torque transmission element with respect to the opening/closing drive source. By doing so, it is possible to provide a highly reliable automatic opening/closing document pressure bonding layer with excellent operability. In addition, the present invention can press even thick originals against the surface of the original layer with a uniform force, and as a result, the surface to be copied is brought into close contact with the surface of the original layer, resulting in high You can get a quality copy.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example in which the apparatus of the present invention is applied to a copying machine, FIG. 2 is a perspective view schematically showing only the essential parts of an embodiment of the invention, and FIG. 3 is a perspective view of an embodiment of the invention. FIG. 4 is an enlarged cross-sectional view of a portion of a state in which a thick original is attached, and FIG. 5 is a partial cross-sectional view schematically showing a coupling portion of another embodiment of the present invention. FIG. 3 is a document pressure bonding book, 7 is a pressure plate, 8 is a cushion member,
9 is a white layer, 10, 1 1 is a bracket, 12, 17,
24 is a shaft, 13, 15, 16, 22, 23 is a bearing, 14
is a support stand, 18 is a slit disk, 19 is a motor unit, 20 is a drive shaft, 21, 25 are gears, 26 is a coupling, 27 is a column, 28, 35 are disks, 33 is a photointerrupter, 34, 36 is a lining, 37 is a pin, 38 is a ring, 40, 48 is a compression coil spring, 42, 44, 4
6 and 47 are clutch plates, and 50 is a support member. Figure 1: 3rd degree wing Figure 2: Figure 4: Figure 5

Claims (1)

[Scope of Claims] 1. An automatic opening/closing document pressing device that presses a document onto a document placing table, comprising: a document pressing member that has a center of rotation and is rotatable relative to the document placing portion; and the document pressing member. The original pressing member is equipped with a supporting means that can support and freely slide vertically, a driving source, and a constant torque transmission element that slips and does not transmit the driving force when a torque exceeding a predetermined value is applied. A drive transmission system that transmits the driving force of the drive source to the document pressing member in order to open and close the document mounting table; An automatic opening/closing document pressing device comprising: opening/closing position detection means provided downstream for detecting the position of the document pressing member.