JPS604095B2 - Paper feeder drive device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive device for driving a paper feeder in a paper feeder of the type that sequentially takes out signatures, covers, etc. stacked on a paper stacking table from the bottom layer and supplies them to a conveyance device, etc. It is related to.

A collating machine that collects paper sheets or signatures in page order, and a bookbinding machine that attaches a cover to the collated contents and binds them into a book, transports the paper leaves, signatures, covers, etc. (hereinafter referred to as paper) to a transport device, etc. It is equipped with a paper feeder.

FIG. 1 is a schematic side view showing part of a paper feeder and a conveyance device of a conventional collating machine. Above the conveyance device 2 that travels toward the side, a plurality of paper feeders 5 each consisting of a paper stacking table 3 and a paper feed arm 4 are arranged in parallel along the conveyance path. Then, the lowest layer of paper 7 loaded in the frame 6 of the paper stacking table 3 is sucked by the suction port 8, which is indicated by reference numeral 7A, and the suction port 8 rotates clockwise around the support shaft 9. As a result, the front end portion is bent into a dogleg shape as shown in the figure. The paper feeder Tsukioka 41, which rotates in the direction shown by arrow A in the figure, rotates around it and rotates in the direction shown by arrow B in the figure by a cam device, thereby connecting the toe and this. The edge of the paper is held between the nail rests 11 provided opposite to each other.
Then, as the paper feed arm 4 further rotates, the paper 7A
is extracted from the frame 6 and conveyed in such a state that it is wrapped around the paper feed 8 and 4, and is released from the holding claw 10 above the pedestal 12 of the conveying device 2 and falls. A conveyance chain 13 runs there from the direction of the back of the paper in the figure, and pushers 14 disposed on the chain at regular intervals push the paper 7A and cause it to fall from the pedestal 12 onto the conveyance table 15. Paper 7B supplied by a paper feeder upstream of the paper feeder 5 is stacked on the conveyor table 15, and the paper 7A falls onto the stacked paper 7B. Thereafter, the pusher 14 pushes and conveys the stacked papers supplied by the respective paper feeders onto the conveyor table 15. In the subordinate collating machine 1 configured as described above, the paper feed cylinder 4 of the paper feeder 5 always rotates at a constant speed.
There was a problem with the movement of the paper by the nail 10'.

That is, when lifting the paper 7A, the lifting claw 10 turns in the opposite direction of the arrow B to raise the paper 7A with respect to the paper feed cylinder 4 which is rotating at high speed in the direction of the arrow A. As a result,
In addition, since the paper 7A is instantaneously changed from a stationary state to the rotational speed of the fluke claw 10, the fluke operation becomes uncertain, failure to fluke occurs, and the piece is not fed. , pages were often missing, resulting in so-called missing pages. Therefore, in order to eliminate this missing page, it is necessary to reduce the rotational speed of the paper feed cylinder 4 and to lower the height of the stacked paper 7 in the frame 6 to reduce the resistance when taking out the paper 7A. This has always been an obstacle to increasing machine speed and improving work efficiency. Also, from the point of view of the load on the paper feed cylinder 4, the raised claw 10 is within the range indicated by the symbol C in the figure.
The load increases while A is being pulled out and the load decreases while the A is being transported after being pulled out, so the load fluctuations are extremely large. In particular, two leech claws 10 as shown in the figure are placed in opposing positions.
In the case where the paper is individually installed, the sliding motion and the releasing motion of the paper overlap at the same time, resulting in even greater load fluctuations. The present invention has been made in view of the above points, and includes an external tooth segment coaxially attached to the paper feed 8 on the outer periphery of a rotating body that is loosely mounted on the paper feed cylinder shaft and is drivingly connected to the driving side. The rotation of the paper feed cylinder is controlled by pivotally mounting an increase/decrease gear with internal teeth that mesh with the gear, and by engaging a cam follower pivotally attached to the increase/decrease gear with a cam groove of a grooved cam fixed to the frame. , the speed is slowed down while the nails run over the paper and the paper is pulled out, and the speed is increased after the paper is pulled out.
By configuring this structure, the paper feeder's drive device is designed to ensure the continuous movement of the paper and prevent the occurrence of missing pages due to paper slippage, as well as to eliminate load fluctuations on the paper feed cylinder and increase the speed of the paper feeder. This is what we provide. Hereinafter, its configuration and the like will be explained in detail with reference to embodiments shown in the drawings.

Figures 2 to 4 show an example in which the drive device for a paper feeder according to the present invention is applied to a collating machine, and Fig. 2 shows a part of the paper feeder and conveyance device of a collating machine in which the drive device according to the present invention is implemented. FIG. 3 is a longitudinal sectional view of the drive device, and FIG. 4 is a side view of the same.

In these figures, the same reference numerals as those of the conventional collating machine shown in FIG. 1 are the same, and the explanation thereof will be omitted. In the figure, in the collating machine 21, a motive oil 23 running parallel to the transport path of the paper 22 is suspended over the entire length of the machine. It is attached to the shaft. Furthermore, a paper feed cylinder shaft 27 parallel to the driving shaft 23 is supported independently for each frame on the frame 26 that supports the driving shaft 23, and a plurality of discs 28 are mounted on the frame 26. A paper feed cylinder 29 is formed by these discs 28 and the paper feed 8 coaxial 27. A pair of claw shafts 30 are mounted on the paper feeder 8 and 29 at positions that penetrate through each disc 28 and bisect the outer circumference of the disc 28 into two equal parts in the circumferential direction. When the paper feeder 8 and 29 rotate, the claw (not shown) opens and closes the paper stacking table 3.
Holding pawls 31 are mounted adjacent to the outer disc 28 to open and close at positions corresponding to the lower end entrance and at positions corresponding to the pedestal 12 of the transport device 2, respectively. Further, the disk 28 is provided with a claw base 32 for sliding the paper 22 together with the swinging claw 31. A paper feed gear 33 as a rotary body that meshes with the drive gear 25 is attached to the paper feed lug coaxial 27 on one side of the disc 2
A segment gear 35 having external teeth formed in a fan shape is fixed to the paper feed shaft 27 adjacent to the segment gear 8 and rotatably mounted via a ball bearing 34. It is attached to the shaft.

Further, an increase/decrease gear 37 having internal teeth 36 that is inscribed in the segment gear 35 and meshes with the segment gear 35 is pivotably pivoted on the outer circumference of the end surface of the paper feed gear 33 on the segment gear 35 side by a pin 38. A cam follower 39 is pivotally attached to the side end surface of the frame 26 by four pins. On the other hand, inside the frame 26, there is a paper feed cam 41 equipped with a cam groove consisting of a small diameter part 41a, a large diameter part 41b, and a speed increase part 41c and a deceleration part 41d provided between both parts 41a and 41b. The paper feed cylinder shaft 27 is equipped with iron and the same 0
The cam follower 39 is fixed to the frame 26 in the shape of a paper feed cam 41, and the cam follower 39 is connected to the cam register of the paper feed cam 41. Other than that, the configurations of the paper stacking table 3 and the conveying device 2 are the same as those of the conventional collating machine shown in FIG. The operation of the collated fiber 21 configured as above will be explained.

The paper feed gear 33, which meshes with the drive gear 25 on the drive ball 23 when the machine is started, rotates at a constant speed in the direction indicated by the arrow ○ in the figure, and the increase/decrease gear 37 pivotally attached to its end face rotates at a constant speed.
The paper feed shaft 27 also revolves around the paper feed Tsukioka shaft 27 at a constant circumferential speed.
The cam follower 39 pivotally attached to the increase/decrease gear 37 is engaged with the cam groove of the paper feed cam 41 fixed to the frame 26 side, and the internal teeth 36 of the increase/decrease gear 37
is meshed with the segment gear 35, so when the cam follower 39 moves circularly, the increasing/decreasing gear 37
(with the meshing position with the segment gear 35 fixed) is rotated at a constant speed, and thus the paper feed cylinder 29 is rotated at a constant speed. That is, when the cam follower 39 is engaged with the small diameter portion 41a or the large diameter portion 41b of the cam groove, it moves circularly, so that the paper feed cylinder 29 rotates at a constant speed. Now, when the cam follower 39 rotates and approaches the enlarged part 41d from the small diameter part 41a to the large diameter part 41b, the increase/deceleration gear 37 rotates clockwise in the figure, and the segment gear meshes with this. 35 also rotates clockwise, and since this is the same direction as the rotation direction of the paper feed cylinder 29, the picture paper and the paper feed cylinder 29 are rotated clockwise. A 39 is the speed increasing part 41
The speed is increased while going up d, and when it reaches the large section 41b, it returns to the speed before the speed increase. Further, when the cam follower 39 goes around further and approaches the deceleration part 41c from the large diameter part 41b to the small diameter part 41a, the increase/deceleration gear 37 rotates in the counterclockwise direction opposite to the rotation direction of the paper feed lug 29. Therefore, the paper feed cylinder 29 is
It is decelerated while descending through the deceleration section 41c, and returns to the speed before deceleration when it reaches the small diameter section 41a. As the paper feeding lug 29 rotates, the flute claw 31 opens in front of the position corresponding to the lower end closing part of the paper bond table 3 and closes at the corresponding position. The end of the paper is pulled out from the paper stacking stand 3 by slipping between it and the claw stand 32.

Therefore, by setting the deceleration part 41d of the paper feed cam 41 in accordance with the opening/closing of the latches 31 and the pulling out position of the paper 22, the paper is fed from the time the latches 31 open until the paper 22 is completely pulled out. The rotation of the barrel 29 is decelerated. And niece nails 3
1 finishes pulling out the paper 22, the cam follower 39 reaches the large part 41b of the cam groove, so the rotation of the paper feeder 8 and 29 returns to a constant speed, and the paper 22 is placed on the circumference of the disc 28 of the paper feeder Tsukioka 29. It begins to be transported in a wrapped state. Then, by setting the starting end of the speed increasing part 41c of the paper feed cam 41 in accordance with the position in the middle of conveyance, the paper feed cylinder 2
The distance is increased by rotation 9, and the cam follower 39 reaches the small diameter portion again. After that, the above operation is repeated, but in this embodiment, since two nails 32 are provided, the total number of sheets per month is 2.
The cam groove of the paper feed cam 41 is formed so that the same increasing/decreasing operation is repeated twice during one rotation of the paper feeding cam 41. Then, the paper 22 that has fallen onto the pedestal 12 is pushed by the pusher 14, falls onto the conveyor table 15, and is conveyed, and each time the paper 22 passes below the paper feed cylinder 29 of each frame, a different page of paper 22 is sequentially transferred. The paper is fed and the collation operation continues.

In the collating work performed in this manner, as mentioned above, the rotation of the paper feed cylinder 29 is decelerated while the elevating claws 32 are elevating the paper 22 and pulling it out, and the paper feed cylinder 29 is slowed down so that the paper 22 is at rest. Since the gripping claws 31 rotate at a reduced speed, the gripping claws 31 do not flutter or lack the fluttering force and fail to grip the paper 22, thereby preventing missing pages. It can be prevented.

Further, after the paper 22 is pulled out by the folding claw 31, the rotation speed of the total paper cylinder 29 is increased until the next flipping operation, so that the paper feed cylinder 2
9 is given rotational inertia, and in this state the cam follower 3
9 will go up the deceleration part 41 which is the uphill slope of the cam,
Very reasonable. Paper leeches, which have an even heavier load,
The paper feed cylinder 29 is decelerated during the drawing operation, and the speed of the paper feed cylinder 29 is increased while conveying paper with a small load. Load fluctuations during rotation are significantly reduced. In this embodiment, an example is shown in which two claws 31 are provided at opposing positions on the outer circumference of the paper feed cylinder 29, but these may be provided at only one location. Speed increasing section 41 on paper cam 41
It is sufficient to provide one each of the deceleration section c and the deceleration section 41d.

Furthermore, the present invention is applicable not only to the paper feeder of a collating machine, but also to any paper feeder equipped with a trade-in type paper ledger, such as a return feeder or a cover feeder of a bookbinding machine. It can be implemented. As is clear from the above description, according to the present invention, the paper feeder 8 is coaxially mounted on the outer periphery of the rotating body which is loosely mounted on the paper feeder cylinder shaft of the paper feeder and is drivingly connected to the driving shaft. A paper feed cylinder is mounted by pivotably mounting a distance increase/decrease gear with internal teeth that mesh with an external tooth segment gear, and a cam follower pivotally connected to this distance increase/decrease gear is engaged with a force ham groove of a grooved cam fixed to the frame. By configuring the rotation to be increased or decreased during one revolution, the rotation of the paper is decelerated during the paper feeding and the paper pulling operation by the paper claw, and after the paper is pulled out, the next paper is drawn out. Since the speed is increased before the feeding operation, it is possible to ensure the paper feeding operation, prevent the occurrence of missing pages due to failure to feed the paper, and reduce the average load at each point during paper feeding and one rotation. Since there is no fluctuation in the load, it is possible to increase the speed of the machine in combination with ensuring the above-mentioned fluctuating operation.

[Brief explanation of drawings]

FIG. 1 is a schematic side view showing a part of a paper feeder and conveyance device of a conventional collating machine, FIGS. 2 to 4 show a drive device of a paper feeder according to the present invention, and FIG. A side view showing part of a paper feeder and a conveying device of a collating machine in which this is implemented, FIG. 3 is a longitudinal sectional view of the drive device, and FIG. 4 is a side view of the same. 24... Paper feeder, 26... Frame,
27. ．．・．． ．．・Paper feed moon coaxial, 29... Paper feed Tsukioka, 31... Niie Tsume, 33... Paper feed gear, 35... Segment gear, 36 ．． ．． ．． ．． ．．
．． Internal teeth, 37... Increase/decrease gear, 39... Cam follower, 41... Paper feed cam. Figure 1 Figure 2 Figure 31 Figure 4

Claims (1)

[Claims] 1. A paper feed cylinder that has a gripping claw that can be opened and closed on its outer periphery and whose center axis, the paper feed cylinder shaft, is rotatably supported on the machine frame;
a rotary body that is loosely attached to the paper feed cylinder shaft and rotates while drivingly connected to the driving side; an externally toothed segment gear that is pivotally attached to the paper feed cylinder shaft; and a segment that is pivotally mounted on the outer periphery of the rotor An increase/decrease gear having internal teeth meshing with the gear, a cam follower pivotally connected to the increase/decrease gear, and a groove cam fixed to the frame side and having the cam follower engaged in the cam groove thereof, The rotation of the paper feed cylinder, which is driven by a rotating body through an increase/decrease gear and a segment gear, is increased/decreased at a predetermined position during one rotation by the swing of the increase/decrease gear as the cam follower moves along the cam groove. A drive device for a paper feeder, characterized in that it is configured to speed up the paper feeder.