JPS63154569A - Copy sheet conveying device for copying machine - Google Patents

Abstract

PURPOSE:To reliably execute gripping of a copy sheet by means of a gripper, by a method wherein a guide plate is rotatably supported through an axle, and the tip of the guide plate is disposed in a position allowing the tip to be engaged with the gripper when the copy sheet is gripped by the gripper. CONSTITUTION:When a copy sheet 5 is gripped by means of a gripper 4, and when the gripper 4 is stopped in a position shown in a Fig, a gripper body 7 and a claw 9 of the gripper 4 are unfolded by means of an opening and closing means, the gripper body 7 is secured to a tip 13a of a guide plate 13, and the claw 9 to a tip 19a of a plate 19 secured to a guide plate 14. As noted above, when the gripper body 7 is engaged with the guide plate 13 and the claw 9 is engaged with the guide plate 14, no gap is provided between guide plates 6 and the gripper 4, and the copy sheet 5 is reliably inserted between the gripper body 7 and the claw 9 by means of the guide plates 13 and 14. When a space between the gripper body 7 and the claw 9 is closed with the opening and closing means, the copy sheet 5 is reliably gripped by means of the gripper 4.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a paper conveying device for conveying copy paper, and in particular, a gripper that grips one end of the copy paper is moved via a chain, thereby conveying the copy paper. The present invention relates to a so-called chain delivery type paper conveying device.

[Conventional technology]

FIG. 4 is a conceptual diagram showing a paper conveyance device 1 of a conventional copying machine. 4, and copy paper 5 is placed on this gripper 4.
It is composed of a pair of fixed guide plates 6 for guiding. Of these, the gripper 4 is composed of a long gripper body 7 having a substantially U-shaped cross section and a claw 9 rotatably supported in a recess 7a of the gripper body 7 via a shaft 8. This claw 9 is operated by an opening/closing means (not shown), and grips the tip @ 5 a of the copy paper 5 inserted between the claw 9 and the gripper main body 7.

According to such a conventional paper conveyance device 1, when the copy paper 5 is conveyed to the guide plate 6 as shown by a solid line via a paper conveyance means such as a vacuum type transport 1- (not shown),
The leading edge 5a of the copy paper 5 moves in conjunction with the paper transport means, and is guided into the gripper 4, which is stopped at a predetermined position and is on standby.

Note that the gripper body 7 and the claws 9 are kept in a standby state by being expanded between them by the opening/closing means.

Further, when the leading end 5a of the copy paper 5 is inserted between the gripper body 7 and the claw 9, the opening/closing means is activated by a paper position detection sensor (not shown) to close the gap between the gripper body 7 and the claw 9. During this time, the leading edge 5a of the copy paper 5 is gripped. Thereafter, the gripper 4 is moved by the sprocket 2 and the chain 3, and conveys the copy paper 5 to a fixing device (not shown), a photoreceptor, or the like.

[Problems to be Solved by the Invention] [By the way, in the paper conveyance device 1 of the conventional copying machine described above, the stopping position of the gripper 4 in the standby state may shift, or there may be a gap between the gripper 4 and the guide plate 6. Since the gap T is formed, if the leading edge 5a of the copying paper 5 is warped or otherwise deformed due to changes in the quality of the copying paper or environmental conditions, the leading edge 5a of the copying paper 5 can be reliably gripped by the gripper as shown by the dashed line. The clipper 4 is not inserted between the main body 7 and the claw 9, and there is a possibility that the copy paper 5 cannot be conveyed by the clipper 4. Note that the gap T is necessary for the gripper 4 to move relative to the fixed guide plate 6.

[Means and operations for solving the problem] In the present invention, a copy paper guided through a guide plate is gripped by a gripper, and the gripper is moved via a chain to convey the copy paper. In the paper conveyance device, the guide plate is rotatably supported via a shaft, and the tip of the guide plate is arranged at a position to engage with the gripper when the copy paper is gripped by the gripper. As a result, the guide plate is rotated by a predetermined rotation angle around the axis in accordance with the movement of the gripper, and a gap is created between the gripper and the guide plate when the copy paper is gripped by the gripper. This prevents them from forming.

〔Example〕

An embodiment of the paper conveying device according to the present invention will be described in detail below.

FIG. 1 shows a paper conveying device 10 of a copying machine according to the present invention.
This is a conceptual diagram showing the same parts as in FIG. 4 with the same reference numerals.

In this paper conveying device 10, a pair of fixed guide plates 6 are provided.
and the chain □-3 that moves the gripper 4.
．． A pair of guide plates 13 rotatably supported around 12
．． 14 is out of place. This guide plate 13.14 has its tip 1'3'a, ``''14a in front of the copy sheet □
The rear end 13'b,"14
b is supported by springs 15, 16, and both guide plates 1
3.14 are constantly biased clockwise about the shafts 11.12, respectively. The guide plates 13, 14 are restricted from rotating clockwise beyond a predetermined rotation angle by pins 17, 18 that abut the bearings 13""c', 1"'4"'c. In addition, an auxiliary plate 19 is fixed to the lower end of the guide plate 14.
9a extends to a position closer to the chain 3 than the tip 14a of the guide plate 14.

Next, the operation of the paper conveyance device 10 described above will be explained, and the configuration will also be explained in more detail.

When the gripper 4 is to grip a copy sheet, the gripper 4 moves from the position shown in FIG. 1 to the position shown in FIG. 2 via the sprocket 2 and chain 3 and stops at that position. The gripper main body 7 and the claws 9 are expanded by the opening/closing means (not shown), and the gripper main body 7
is attached to the tip 13a of the guide plate 13, and the claw 9 is attached to the tip 13a of the guide plate 13.
4, respectively. In this way, when the gripper body 7 and the guide plate 13 engage, and the claws 9 and the guide plate 14 engage, respectively, there is no gap between the fixed guide plate 6 and the gripper 4,
Therefore, the copy paper 5 transported from a paper transport means (not shown) is reliably inserted between the gripper body 7 and the claws 9 by the guide plates 13.14. Note that the information board 1
The length of 3.14 is preset so as to make surface contact with the gripper body 7 and the claws 9 at the stop position shown in FIG. 13, 14 and the gripper 4 are never disengaged. In this way, the leading edge 5a of the copy paper 5 is guided between the gripper body 7 and the claw 9, and then when the gap between the gripper body 7 and the claw 9 is closed by the opening/closing means (not shown), the copy paper 5 is It is gripped by the gripper 4. When the clipper 4 is further moved by the chain 3, the third
As shown in the figure, the guide plate 13.14 is disengaged from the gripper 4 and the guide plate 13.14 is moved by the spring 15.
The copy sheet 5 is returned to the same initial position as shown in FIG. 1 by the biasing force 16, and at the same time, the copy sheet 5 is conveyed to a fixing device (not shown) or the like.

In the above embodiment, the copy paper fed 1;9 from the fixed guide plate 6 is guided to the gripper 4 via the rotatable guide plates 13 and 14, but the present invention is different from the above embodiment. The present invention may be applied to a sheet conveying device 10 without a fixed guide plate 6 without being limited thereto.

(Effects of the Invention) When guiding copy paper to a gripper, the present invention engages a gripper that grips the copy paper with a guide plate that guides the copy paper to this gripper, thereby creating a gap between the guide plate and the gripper. Since this guide plate is rotatably supported via a shaft, copy paper that is warped or otherwise deformed will be guided, and even if the gripper positioning stop position is slightly shifted, the copy paper will not move. Since the copy sheet is reliably inserted into the gripper, the copy sheet can be reliably gripped by the gripper, and the sheet conveyance performance of the sheet conveyance device using the gripper can be dramatically improved.

[Brief explanation of the drawing]

1 to 3 are conceptual diagrams of a paper conveyance device according to the present invention, and FIG. 4 is a conceptual diagram of a conventional paper conveyance device. 2...Chain, 4...Gripper, 5...Copy paper, 10...Paper transport device, 11.12...Shaft, 1
3.14... Guide plate, 13a, 14a... Tip.

Claims (1)

[Claims] In a paper conveyance device for a copying machine, the copy paper guided through a guide plate is gripped by a gripper, and the gripper is moved via a chain to convey the copy paper, and the guide plate is rotated through a shaft. The leading end of the guide plate is disposed at a position where it engages with the gripper when the copy sheet is gripped by the gripper, and the guide plate is made to follow the movement of the gripper. A paper conveyance device for a copying machine, characterized in that it is rotated by a predetermined rotation angle around a shaft.