JPH0712368Y2 - Stack collapse prevention device in the vicinity of the stack exit of the stacker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION a) Field of Industrial Use This invention is directed to flat objects having opposite edges with different thicknesses, for example,
A paper stock that has a thickness on the fold side that is thicker than that on the cut side, such as a newspaper that has completed printing folding, and stacks a predetermined number of such flat objects to form a stack (hereinafter referred to as a small bundle).
From the stacker stacking space where the small bundles can be stacked and carried out by changing the phase by 180 ° with respect to each other, immediately after carrying out the small bundles on the conveyor, Load collapse due to the difference in thickness, that is, slippage to both sides (see Fig. 5)
Regarding the device for preventing the occurrence of the above, more specifically, the stacked small bundles, where the collapse of the load is prevented by the partition members on both sides in the stacker stacking space, As soon as it is released from the partition members on both sides when it is carried out from there, it loses its support, and due to the inertial force generated at the start of carrying out, as shown in FIG. Since it slips on both sides at the interface of each other and shifts, the shift is prevented and the next process with a normal packing,
For example, the present invention relates to a load collapse prevention device that can be supplied to a packaging and binding process or the like.

b) Conventional Technology Generally, when the stack is stopped during transportation and when the stack is started to move, the upper part of the stack displaces forward or backward in the traveling direction due to inertial force. In order to prevent this, it is well known that a stopper composed of a contact plate or the like is mainly brought into contact with the front surface or the rear surface of the upper part or the entire upper and lower parts of the integrated body (Japanese Utility Model Publication No. 55-10366 and Japanese Utility Model Publication No. 59-). 129701, JP-A-61-211266).

On the other hand, it is also known to press the partition members against the sides of the stack in order to correct the displacement of the transported stack itself to the desired position. (Actual public Sho 57-
32088, Japanese Patent Publication No. 58-10331).

On the other hand, with respect to the slippage deviation to both sides which occurs in the stack immediately after being discharged from the stacker stacking space, which is a problem of the present invention, conventionally, spraying between small bundles and folding on the fold side have been performed. Thorough strengthening was implemented.

c) Problems to be Solved by the Invention However, as described above, when mist is blown to the interface between the small bundles, it is difficult to slip and the load collapse is prevented, but the quality is deteriorated by the addition of water. Not only that, it is not a good idea because it causes rust on the metal members, and even if the folding on the fold side is thoroughly performed, not only the difference in thickness between the fold side and the cut side is not eliminated, but also stains and wrinkles are generated on the printing paper surface. I was worried that the quality would deteriorate.

As a technical problem to be solved by the present invention, a point to be particularly noted is that the aggregate is immediately after being discharged from the stacker in the previous process and in the transfer process before the transfer to the next process, for example, the packaging or binding process. It is a problem to arrange the packing, in other words, arrange the packing of the stack and supply it to the next process without any physical obstacle to the work of the next process. What is desired is that it can be reached in a dynamic transfer process rather than at rest. Therefore, in order to satisfy this demand, as shown in the above-mentioned known technique, if the stopper or the partition member is simply pressed from the position opposite to the direction in which the displacement collapses, the existence of those members is the next step. However, it is not a solution of the present invention.

The purpose of this invention is to prevent slippage to both sides of the stack being transferred immediately after the stack exit from the stacking space in the stacker of the previous process and before the loading to the next process. An object of the present invention is to provide a device which can be easily and reliably prevented in a manner that does not cause any physical hindrance.

d) Means for Solving Problems The present invention achieves the above-mentioned object by disposing the pushing means opposite to each other at both sides of the stacker stacking space in the vicinity of the stack discharge port so as to be able to move forward and backward. That is, to be more specific, they are arranged on both sides of the carry-out path near the stacker outlet of the stacker so as to face each other, and both of them are arranged so as to gradually project from the outer side to the inner side along the carry-out direction. A pair of pressing means, at least one of which is attached so as to be adjustable so that the distance between the maximum inward projecting ends of both of them is approximately equal to the width of the aggregate passing therethrough; It is characterized in that a driving means for displacing at least one of the pressing means and a signal generating means for activating the driving means at a timing matching the carry-out movement of the integrated body are provided.

e) Action Since a pair of pressing means are installed opposite to each other on the carry-out path immediately after the carry-out port where the stacks are carried out from the stacking space of the stacker, slippage between the small bundle interfaces that occurs during accelerated transfer in the initial stage of the carry-out operation is prevented. It

When the work position of the next process is provided in the vicinity of the downstream side, the stack can be provided to the work position of the next process while only the rearmost end of the stack is pressed by the pressing means. ,
The work of the next step can be freely performed without being hindered by the pressing means.

Even if the work position of the next process is provided at a distance, the slippage of the stack is prevented during acceleration at the initial stage of the carry-out operation, so that the stack is not supported by the pressing means during the subsequent constant-speed transport. There is no risk of slipping to both sides even when separated.

f) Example First, as shown in FIGS. 1 to 3, a general configuration example of a stacker S in which flat objects are stacked to form an integrated body has a space S1 surrounded by a partition member S5. An aggregate or small bundle consisting of a stack of a certain number of flat objects in the space S1
B1 and B2 are integrated by the rotary table S6 with their phases changed by 180 °. Then, the small bundles are sequentially transferred to the space S1 via the temporary receiving member S4 provided above the accumulation space S1.
It is formed by falling inside and stacking. The small bundles B1 and B2 that have been accumulated are unloaded from the space S1 to the unloading path S3 via the unloading port S2 by the pushing operation of the pusher P.

The pushing means 1 according to the present invention is installed opposite to both sides of the carry-out path S3 in the vicinity of the carry-out exit S2, and its installation posture is
Both of them are arranged so that they gradually project from the outer side to the inner side along the carry-out direction, and the intervals between the maximum inward projecting ends are adjusted to be approximately equal to the width of the aggregate passing therethrough. It Therefore, slippage to both sides of the stack will be
In relation to the progress of the process, the pair of pressing means 1 and 1 are gradually repaired from the wide spacing positions, and are completely shaped between the innermost maximum projecting ends on the most downstream side. The figure from the leading side to the trailing side is completed.

The shapes of the pressing means 1 and 1 shown in the first embodiment of FIGS. 1 to 3 are, as shown in FIG. 4, the free end portion 12a of the flat plate-shaped arm 12 with the shaft 11 as the swing center. , 12b, each supporting shafts 13, 13 of a pair of pressing rollers 14, 14 are rotatably supported.

As shown in FIG. 1, the driving means pivotally supports the shaft 11 on a first bracket 111 projecting from the frame F, while the second bracket 15 projecting from the frame F is mounted on a second end of the hydraulic cylinder 2. Is rotatably supported, and a clevis 22 provided at the tip of the rod 21 of the cylinder 2 is further attached to a third bracket 24 protruding from the back surface of the flat plate-shaped arm 12,
By extending and shortening the rod 21 of the cylinder 2 by connecting via the pin 23, the arm 12 including the pair of pressing rollers 14, 14 is moved from the side of the carry-out path S3 about the axis 11 to the inside of the path. It is configured so that it can move into and out of the road. The second bracket 15 and the frame F can be fixed to each other by slightly changing the fixing position by forming a bolt hole provided on the bracket 15 side as a long hole.

The expansion and contraction start of the rod 21 of the fluid pressure cylinder 2 is performed by, for example, adjusting a signal obtained by detecting the forward movement and the backward movement of the pusher P with a timer (not shown) for an appropriate time delay,
The signal is obtained by operating a switching valve (not shown) interposed between the fluid pressure cylinder 2 and a pressure source (not shown). Alternatively, the presence or absence or movement of the aggregate obtained from a sensor (not shown) provided toward the aggregate passage space in the carry-out path S3 is detected, and the switching valve (not shown) is detected by a signal obtained therefrom. ) Can be manipulated to obtain the extension or shortening of the rod 21.

The operation of the first embodiment shown in FIGS. 1 to 3 is as follows.

First, by a well-known operation of the stacker S, a small bundle B1 of a predetermined number of flat objects and a space B1 on the rotary table S6 and
When B2 alternately changes the phase by 180 ° and completes the integration,
At the same time when the pusher P starts to be activated by the instruction of the completion signal, the partition member S5 is opened, and the stack of the small bundles B1 and B2 is pushed out from the space S1 through the carry-out port S2 onto the carry-out path S3.

The front end of the extruded stack is pushed out to the position of the pressing rollers 14 and 14 or the front thereof, while the rear end of the stack is not released from the regulation of the partition member S5 of the stacker. When the is pushed out, a signal delayed by a timer is prepared so as to be transmitted at that time. Then, the switching valve (not shown) is switched by the signal to extend the rod 21 of the fluid pressure cylinder 2. Then, the arm 12 that interlocks with the rod moves to the shaft 11
Is oscillated around the fulcrum, and the pressing rollers 14 and 14 are angularly displaced inward from the outside of the transport path S3, respectively, and the stack is pressed so as to be sandwiched from both sides.

The stack, which is pressed on both sides, is gradually transferred from the front to the rear while the pressing position is gradually transferred onto the transfer device C and further transferred at a constant transfer speed generated from the transfer device C. The rear end of the stack is also pressed by the pressing roller 1
Get out of the regulations of 4 and 14. The accumulated body released from the pressing of the rollers 14 and 14 is conveyed without slippage between the interfaces of the small bundles B1 and B2 unless the constant-speed conveyance state continues and a new external force is applied. .

A timer (not shown) that operates in response to the pushback command signal of the pusher P is provided with a start signal delayed for a predetermined time, and the signal causes the switching valve (not shown) to be switched again. The rod 21 of the fluid pressure cylinder 2 is shortened, and the rollers 14 and 14 are returned to the standby position outside the transport path S3.

Second embodiment (Fig. 6) and third embodiment (Fig. 7)
Instead of the arm 12 with rollers 14 and 14,
In particular, the third embodiment does not have the swing support shaft 11, but has sliding guide means 18, 18 instead of the swing support shaft 11,
The holding plates 16, 16 are interlocked with the operation of the fluid pressure cylinders 2, 2.
Can be displaced in a direction substantially perpendicular to the conveying direction of the stack. The fourth embodiment (FIG. 8) shows a structure in which four rollers 14 are provided on the arm 12. Furthermore, in the fifth embodiment (FIG. 9) and the sixth embodiment (FIG. 10), the swing support shaft 11 is used.
A pulley 19 is provided coaxially with and an endless belt 17 is stretched between the roller 14 and the roller 14, and the belt is brought into contact with the side surface of the stack. In particular, the sixth embodiment (Fig. 10) shows a constitutional example in which the shaft 11 is connected to the drive source 17a and the endless belt 17 is driven at the same speed as the conveying device C.

Although not shown, one side of both pressing means 1 and 1 can be fixed and only the other side can be displaced, or the pressing means on one side and the other side can be different means. It can be easily configured.

It is needless to say that this invention is not limited to the embodiments described in detail above, but includes any design modifications without departing from the spirit of the invention.

g) Effect of the Invention As described in detail above, the present invention gradually provides a pair of pressing means 1, 1 on both sides of the carry-out path S3 in the vicinity of the stacker carry-out exit S2 of the stacker S along the carry-out direction. Since it is arranged so as to project from the outside to the inside and at least one of the pressing means is attached so that it can be displaced toward and away from the side surface of the stack on the carry-out path S3, the small amount that occurs during accelerated transfer at the initial stage of carry-out operation The slippage in both sides between the bundle interfaces is prevented. Further, when the work position of the next process is provided in the vicinity of the downstream side, the work position of the next process is set in the state where only the rearmost end of the stack is pressed by the pair of pressing means 1, 1. Since the integrated body can be provided, the work of the next step can be freely performed without being hindered by the pressing means. Further, even when the work positions of the next process are provided at a distance, the slippage of the stack is prevented during the accelerated transfer at the initial stage of the unloading operation. There is no risk of slippage to both sides even if it is separated from the support by 1.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a first embodiment of the present invention, an enlarged cross-sectional plan view taken along line XX of FIGS. 2 and 3, and FIG. Fig. 3 is a right side view in vertical section taken along line -Y, Fig. 3 is a front view in vertical section taken along line ZZ in Fig. 2, and Fig. 4 is a perspective view of essential parts used in the first embodiment of the present invention. FIG. 5 is a perspective view showing an example of a slippage shift of a load which is a problem of the present invention, FIG. 6 is a plan view showing a second embodiment of the present invention, and FIG. 7 is a third view of the present invention. 8 is a plan view showing a fourth embodiment of the present invention, FIG. 9 is a plan view showing a fifth embodiment of the present invention, and FIG. 10 is a plan view showing the fifth embodiment of the present invention. It is a top view which shows 6th Example. S ... Stacker, S1 ... Stacking space, S2 ... Stack outlet, S3 ... Unloading path, S4 ... Temporary receiving member, S5 ... Partitioning member,
S6 …… Rotary table, B1 and B2 …… Small bundle (collection), P
... pusher, F ... frame, 1 and 1 ... pushing means, 11 ... shaft, 111 ... first bracket, 12 ... flat plate arm, 12a and 12b ... free end of arm, 13 and 13…
... a pair of roller shafts, 14 and 14 ... a pair of pressing rollers, 15
...... Second bracket, 16 ...... Retainer plate, 17 ...... Endless belt, 17a …… Drive source, 18 …… Sliding guide means, 19 ……
… Pulley, 2 …… fluid pressure cylinder, 21 …… its rod, 22 …… clevis, 23 …… pin, 24 …… third bracket, C …… conveyor.

Claims (1)

[Scope of utility model registration request] 1. A stacker is disposed opposite to both sides of a carry-out path in the vicinity of a stack carry-out exit, and both of them are arranged so as to gradually project from the outer side to the inner side along the carry-out direction. Furthermore, a pair of pressing means at least one of which is attached so as to be adjustable so that the distance between the maximum inward projecting ends of both of them is approximately equal to the width of the aggregate passing therethrough, and the pressing means. Drive means for displacing at least one of the means, and signal generation means for activating the drive means at a timing matching the carry-out movement of the stack, and preventing the collapse of the stack in the vicinity of the stack outlet of the stacker. apparatus.