JPH01209237A - Conveyer for booklet - Google Patents

Abstract

PURPOSE:To enable one side to smoothly convey a thick booklet by separately providing the first and second circular arc parts, corresponding to thin and thick parts of the booklet, in the peripheral direction of a driven roller and setting a radius of curvature of the first circular arc part smaller than the first radius. CONSTITUTION:When a point end of a thin part 12A of a booklet 12 comes between a driven roller 16 and a drive roller 14 in the upstream side, a limit switch, not shown, detects a thick part 12B of the booklet 12, feeding a signal to a control unit 24. Next the unit 24, by this signal, rotates the roller 14 giving conveying force to the booklet 12 while the roller 16 by friction force with the booklet 12 conveying it to the downstream. Here, the roller 16 forms a small contour circular arc part 16A and a large contour circular arc part 16B in a corresponding part to the booklet 12, because the roller 16 places the circu lar arc part 16B corresponding to the thin part 12A and a circular arc part 16A corresponding to the thick part 12B when the roller conveys the booklet 12, it is smoothly conveyed so as to contain its thick part 12B in the outside of the small contour circular arc part 16A when the booklet 12 is conveyed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a conveyance device for booklets whose one side in the conveyance direction is thicker than the other side.

[Conventional technology] Laminating on paper such as plain paper, PPC (
In processing equipment that fixes toner on plain paper (electrophotography),
A conveyance device is provided, and the paper is conveyed to the processing section by the conveyance device.

In this type of conveyance device, a drive roller and a driven roller are provided facing each other with a paper conveyance path in between, and the paper is fed between the drive roller and the driven roller when the paper is conveyed. The drive roller is rotated by the driving force of a motor, etc., and applies conveying force to the paper.
This allows the paper to be conveyed.

The driven roller is rotated by frictional force with the paper and guides the conveyance of the paper together with the drive roller.

In this type of conveyance device, if the driven roller is provided so that it can move toward and away from the drive roller, it can be used when opening and laminating a booklet such as a bankbook, or when fixing toner on PPC. This can also be accommodated by moving the driven roller toward and away from the drive roller in accordance with the thickness of the booklet as the booklet is fed.

However, in this case, especially when one side of the booklet is thicker than the other side when the booklet is opened, a sudden step may occur between the thicker part and the thinner part of the booklet. Because of this, when the thick part of the booklet passes between the drive roller and the driven roller, the driven roller cannot move smoothly in response to the thick part of the booklet, and the driven roller acts as resistance. The booklet cannot be conveyed smoothly due to changes in the booklet feed speed.

[Problems to be Solved by the Invention] The present invention takes the above-mentioned facts into account, and an object of the present invention is to obtain a booklet conveyance device that can smoothly convey booklets.

[Means for Solving the Problems] The present invention is a booklet conveyance device that is thicker on one side in the conveyance direction than the other side and has a thin portion and a thick portion in the conveyance direction. A driven roller is provided on the opposite side of the drive roller across the conveyance path of the booklets, and is rotated by frictional force with the booklets when conveying the booklets. The total length of the roller in the circumferential direction is longer than the total length of the booklet in the conveyance direction (so that the driven roller has a first circular arc portion corresponding to the thin part of the booklet and a thick part of the booklet in the circumferential direction of the driven roller). It is characterized in that the second circular arc portion is provided independently and the radius of curvature of the second circular arc portion is set smaller than the radius of curvature of the first circular arc portion.

[Function] In the present invention having the above configuration, the booklet is fed between the driving roller and the driven roller in an open state with one side in the conveyance direction being thicker than the other side. The booklet is fed between the driving roller and the driven roller and is conveyed, passing between the driving roller and the driven roller. The thick portion passes between the drive roller and the driven roller, with the thick portion corresponding to the second circular arc portion of the driven roller. Since the radius of curvature of the second arc section is smaller than the radius of curvature of the first arc section, when transporting booklets, the thicker part of the booklets is accommodated on the outside of the second arc section so that the booklets can be transported smoothly. transported.

Embodiments FIGS. 1 to 4 show a conveying device 1 to which the present invention is applied.
0 is shown.

1 and 4 from a processing device (not shown) to the conveyance device 10.
As shown in the figure, the booklet 12 is fed in an open state, and the booklet 12 is conveyed in the open state and sent to the next processing device (not shown). The booklet 12 is fed into the conveying device 10 from the thin portion 12A side in an open state with one side thicker than the other side.

This conveying device 10 includes a booklet 12 as shown in FIG.
A driving roller 14 and a driven roller 16 are provided facing each other across the conveyance path, and the driving roller 14 and the driven roller 1
A booklet 12 is sent between the booklet 6 and the booklet 6.

The driving roller 14 and the driven roller 16 are provided on the upstream and downstream sides of the booklet 12 conveyance path, respectively.
They are spaced apart by a distance d, which is approximately the same dimension as the dimension Bl (shown in FIG. 1) of the thin portion 12A of the booklet 12 in the transportation direction of the booklet 12. That is, when the thick portion 12B opposite to the thin portion 12A is placed between the driving roller 14 and the driven roller 16 on the upstream side of the conveyance path when feeding the booklet 12, at the same time, the tip of the thin portion 12A is placed on the downstream side of the conveyance path. It extends between the drive roller 14 and the driven roller 16 on the side.

As shown in FIG. 4, the drive roller 14 has a chain 20 wound around the end of the roller via a sprocket 18. The chain 20 is wrapped around the sprocket 18 of each drive roller 14 and also wrapped around the drive shaft 22A of the motor 22 via the sprocket 18, so that the drive roller 14 is rotated by the driving force of the motor 22 and the booklet is printed. A conveying force is applied to 12.

The motor 22 is connected to a control device 24, and its operation is controlled by the control device 24. Control device 2
4 is connected to a limit switch 26 (shown in Figures 1, 2 and 3).

The limit switch 26 is connected to the booklet 12 as shown in FIG.
The drive roller 14 and the driven roller 16 are provided further upstream of the booklet 12 conveyance path than the drive roller 14 and the driven roller 16 on the upstream side of the withdrawal path of the booklet 1.
When the tip of the thin portion 12A of the booklet 12 reaches between the upstream drive roller 14 and the driven roller 16, the thick portion 1 of the booklet 12
2B, it is detected and a signal is sent to the control device 24. The control device 24 operates the motor 22 based on the signal from the limit switch 26, and then stops the operation of the motor 22 after a predetermined period of time has elapsed.

As shown in FIG. 4, the driven roller 16 has a tension coil spring 30 wound around its end via a bearing 28. The tension coil spring 30 is also wound around the roller end of the drive roller 14 via the bearing 32, and presses the driven roller 16 against the drive roller 14 with a biasing force, so that the drive roller 14
When the roller 16 rotates, the driven roller 16 is rotated. Further, when the booklet 12 is fed between the driven roller 16 and the driving roller 14, the driven roller 16 is
2, the driven roller 16 is rotated by the frictional force with the booklet 12.

At a portion of the driven roller 16 corresponding to the booklet 12, there are a small diameter arc portion 16A as a second arc portion with a small radius of curvature in the circumferential direction and a large diameter arc portion 16 as a first arc portion with a large radius of curvature.
B is formed, resulting in a so-called two-stage diameter. The outer circumferential dimension β1 (shown in FIG. 1) of the small diameter arc portion 16A is the conveyance direction dimension B2 (shown in FIG. 1) of the thick portion 12B of the booklet 12.
is set at the same level. The outer circumferential dimension 12 of the large diameter circular arc portion 16B is the conveyance direction dimension B1 (
(shown in FIG. 1).

Each of the driven rollers 16 has a small diameter arc portion 16A corresponding to a thick portion 12B of the booklet 12 when the booklet 12 is conveyed.

To explain in detail, as shown in FIG. 4, a rotating plate 36 having a slit 34 is attached to the roller end of the driven roller 16 on the upstream side, and a light emitting diode 38, a photodiode 38, etc. sensor 4
0 is provided, and the photosensor 40 detects a predetermined rotational position of the upstream driven roller 16 and determines this position as the initial rotational position of each driven roller 16, that is, the tip of the thin portion 12, A of the booklet 12 is located upstream. The position is defined as the position between the side driven roller 16 and the drive roller 14.

With this setting, the upstream driven roller 16 rotates at the roller initial rotation position (the position where the tip of the thin section 12A of the booklet 12 reaches between the upstream driven roller 16 and the drive roller 14) and the large diameter arc portion 16B. The end on the direction side corresponds to the drive roller 14, and when the booklet 12 is conveyed, the large diameter arc part 16B is made to correspond to the thin part 12A of the booklet 12, and the small diameter arc part 16A is moved as shown in FIGS. 2 and 3. It is adapted to correspond to the thick portion 12B.

On the other hand, when the booklet 12 is conveyed, the leading end of the thin portion 12A of the booklet 12 is connected to the downstream driven roller 16.
and the drive roller 14, the large diameter arc portion 16
The end of B on the rotational direction side corresponds to the drive roller 14, and when the booklet 12 is conveyed, the large diameter arc part 16B is made to correspond to the thin part 12A of the booklet 12, and the small diameter arc 116A is thick, like the driven roller 16 on the upstream side. It corresponds to section 12B. Note that at the initial rotational position of the downstream driven roller 16, where the tip of the thin portion 12A of the booklet 12 is between the upstream driven roller 16 and the drive roller 14, the downstream driven roller 16 is near the end of the small diameter arcuate portion 16A in the rotational direction. corresponds to the drive roller 14, and there is an angular shift of approximately 180 degrees in the rotational position with respect to the upstream driven roller 16.

Next, the operation of this embodiment will be explained.

As shown in FIG. 1, the transport device 10 is fed with the booklet 12 in an open state. The booklet 12 is fed between the driven roller 16 and the drive roller 14 on the upstream side from the thin portion 12A side in an open state where one side is thicker than the other side.

By feeding this booklet 12, the thin flat part 12 of the booklet 12
When the tip of A reaches between the driven roller 16 and the drive roller 14 on the upstream side, the limit switch 26 corresponds to the thick portion 12B of the booklet 12, detects this, and sends a signal to the control device 24. The control device 24 operates the motor 22 based on this signal, and receives the driving force of the motor 22 to drive the drive roller 14.
is rotated to apply a conveyance force to the booklet 12, and at the same time, the driven roller 16 is rotated by the frictional force with the booklet 12, and the booklet 12 is rotated.
is transported downstream.

Here, the driven roller 16 has a small-diameter arc portion 16A1 and a large-diameter arc portion 16B formed in a portion corresponding to the booklet 12, and when the booklet 12 is conveyed, the large-diameter arc portion 16B is made to correspond to the thin portion 12A of the booklet 12, and a small-diameter arc is formed. Part 16A is thick part 12B of booklet 12
Therefore, when the booklet 12 is transported, the booklet 12 is smoothly transported with the thick portion 12B accommodated outside the small diameter arcuate portion 16A. Note that, after the driven roller 16 has conveyed the booklet 12, it is stopped at the initial rotational position (the rotational position shown in FIG. 1), so that the next booklet 12 can be conveyed.

In the above embodiment, the tension coil spring 3-0 is used to rotate the driven roller 16 when the drive roller 14 rotates, and the driven roller 16 is pressed against the drive roller 14 by the biasing force of the tension coil spring 30. However, driven roller 1
6. A gear may be attached to each end of the drive roller 14 so that when the drive roller 14 rotates, the driven roller 16 is rotated via the gear. In this case, since the driven roller 16 does not slip with respect to the driving roller 14, there is no deviation in the rotational position of the downstream driven roller 16 with respect to the rotational position of the upstream driven roller 16, and the operation is maintained. More certain.

[Effects of the Invention] As explained above, the present invention is a booklet conveyance device in which one side in the conveyance direction is thicker than the other side and has a thin part and a thick part in the withdrawal direction, and the booklet is rotated and the booklet is rotated. A driven roller is provided on the opposite side of the drive roller across the conveyance path of the booklets, and is rotated by frictional force with the booklets when conveying the booklets. The total length of the roller in the circumferential direction is made longer than the total length of the booklets in the conveying direction, and the driven roller has a first circular arc portion corresponding to the thin portion of the booklet and a second arc portion corresponding to the thick portion of the booklet in the circumferential direction of the driven roller. Since the second circular arc part is provided independently and the radius of curvature of the second circular arc part is set smaller than the radius of curvature of the first circular arc part, it has an excellent effect of smoothly transporting booklets. have

[Brief explanation of the drawing]

1 to 4 show a conveying device to which the present invention is applied, FIGS. 1 to 3 are sectional views of essential parts showing a booklet conveying state, and FIG. 4 is a perspective view of essential parts. DESCRIPTION OF SYMBOLS 10... Conveyance device, 12... Booklet, 12A... Thin part, 12B... Thick part, 14... Drive roller, 16... Followed roller, 16A... Small diameter circular arc part, 16B ...Large diameter arc part.

Claims (1)

[Claims] (1) A conveyance device for booklets that is thicker on one side in the conveyance direction than the other side and has a thin portion and a thick portion in the conveyance direction, and includes a drive roller that is rotated to apply conveyance force to the booklets. , a driven roller is provided on the opposite side of the drive roller across the booklet conveyance path and is rotated by frictional force with the booklet when conveying the booklet, and the total circumferential length of the driven roller is the same as the booklet. A first circular arc portion that is longer than the total length in the conveying direction of the driven roller and that corresponds to a thin portion of the booklets in the circumferential direction of the driven roller and a second circular arc portion that corresponds to a thick portion of the booklets are independent of each other. What is claimed is: 1. A conveyance device for booklets, characterized in that the radius of curvature of the second circular arc portion is set to be smaller than the radius of curvature of the first circular arc portion.