JP2006159894A - Center-fold booklet corner back forming device - Google Patents

Abstract

An object of the present invention is to provide a square back forming apparatus for continuously forming a folded back portion of a half-folded booklet into a square shape without using a reciprocating movable mechanism by a driving unit and without stopping the booklet transport movement.
A belt 6a is passed from a belt driving roller 3a, 4a to a side pressing roller 5a, and a pressing unit 2b, which is similarly belted from a belt driving roller 3b, 4b to a side pressing roller 5b, is connected to a side pressing roller. 5a and 5b are elastically biased by the spring 8 toward the pressing unit 2a in a positional relationship where the belts 6a and 6b face each other, so that the half-folded booklet 13 is sandwiched between the belts 6a and 6b and conveyed. Back pressing rollers 17a, 17b, and 17c are provided on the lower edges of the belts 6a and 6b, and the back pressing rollers squeeze the back of the booklet when the backs are sandwiched and conveyed in a state of protruding from the belt lower edge. Flatten and mold the corner back.
[Selection] Figure 1

Description

  The present invention forms a square back (square back) by flattening the back of a folded sheet of paper or other sheet bundle (center folded booklet) folded regardless of whether the fold is bound or not. Belongs to the technical field of molding equipment.

  Conventionally, booklets and pamphlets have a plurality of printed sheets of paper, folded in two (middle fold), and the part that becomes the crease is bound with a string or needle, and then folded in half (middle fold). ).

However, in such a booklet, when the number of pages is large or the paper is stiff, a force for restoring the folded portion remains, so that the booklet swells in the thick direction.
When such booklets are stacked, the fold side becomes higher and the upper surface is inclined. Therefore, when it reaches a certain level, the stacked booklets slide down and no more can be stacked. Therefore, every time a plurality of books are stacked, the back side and the fore edge side are stacked in reverse. In this respect, the half-fold booklet may take time to store and transport.

In addition, since the half-folded one is naturally rounded, there is a point that it is difficult to display the back heading character on that portion.
In addition, the external appearance was inferior to that of perfect binding.

  Therefore, in order to improve the above points, a square back forming process is performed in which a back portion is flattened after binding and folding in a middle to form a square back.

FIG. 16 and FIG. 17 are views showing a first example of a conventional half-fold booklet spine forming apparatus.
As shown in FIG. 16A, the saddle-stitched sheet bundle 22 above the opposing clampers 21a and 21b is folded down with the blade 23 until it hits the stopper 24, and then the blade 23 is lifted up (b) 17), the clampers 21a and 21b are driven from the left and right so as to sandwich the saddle stitched sheet bundle 22, and pressure is applied to securely clamp the sheet. Then, the stopper 24 is retracted as shown in FIG. Then, the back pressing roller 25 is brought into pressure contact with the rounded back of the saddle stitched sheet bundle 22 protruding slightly downward from the clampers 21a, 21b, as shown in FIG. By rolling the back portion pressing roller 25, the folded back (round back) protruding downward from the clampers 21a and 21b is crushed and flattened to form a square back portion.

After molding, the clampers 21a and 21b are opened and dropped and discharged downward as shown in (c), or the stopper is advanced again to support the back, and then the clampers 21a and 21b are opened and moved upward. It will be discharged by picking up.
In this example, the clamper 21a, 21b and the blade 23 are used together with the folding of the saddle-stitched sheet bundle 22, but there is a case where the back of the half-folded booklet that has already been bound and folded is formed into a square back. is there.

FIG. 18 shows a part of the configuration of the second example of such a molding apparatus.
The half-folded booklet 13 that has been subjected to binding and half-folding processing arrives at the conveyance means inlet 26.
When the conveying means 27 is formed by arranging two sets of two pulleys 28a, 28b and a belt 29 stretched between them, the pulleys rotate as indicated by solid-line arc arrows. Therefore, the folded booklet is sandwiched between the belts 29 and 29 and conveyed downward, and the back portion (downward in the drawing) of the folded booklet 13 passes between the clampers 21a and 21b and reaches the stopper 24.
When the stopper 24 is reached, rotation of each pulley is stopped by detection of a sensor (not shown), and the clampers 21a and 21b are driven so as to sandwich the folded booklet 13 from the left and right.

At this time, the fore end of the half-folded booklet 13 is sandwiched between the belts 29 and 29 of the conveying means.
When firmly clamped, the stopper 24 is retracted by a mechanism (not shown), and the back portion protruding downward from the clampers 21a and 21b as shown in FIGS. 17 (a) and 17 (b) is the back portion. It is crushed and flattened by rolling of the pressing roller 25 to form a square spine.
When the molding is completed, the clampers 21a and 21b are opened, and the pulleys 28a and 28b of the conveying means 27 are rotated in the direction opposite to the solid-line arc arrow to discharge the molded half-fold booklet 13 upward.
JP 2001-260564 A ([0011] to [0018], FIGS. 1 to 5) US Patent Application Publication No. US2003 / 0031532A1 (ABSTRACT)

However, the conventional apparatus has the following problems.
First, referring to the first example, the saddle-stitched sheet bundle is stopped by the stopper, then the clamper is driven in the closing direction to firmly clamp the saddle-stitched sheet bundle, and then the stopper is retracted, and the back pressing roller is moved to the center. Molding is performed by running in a state in which it is strongly pressed against the back of the bundle of bound sheets. When molding is completed, the clamper is opened again, the saddle stitch sheet bundle is discharged, and the stopper is moved to the initial position.

As is apparent from the above operation, the first example has a problem that there are many drive mechanisms for mechanical reciprocation such as a clamper opening / closing drive mechanism, a stopper advancing / retracting drive mechanism, and a back drive roller driving drive mechanism. is there.
The large number of drive mechanisms has the problem that the equipment becomes complicated and expensive, and the number of moving parts inevitably increases, so there are many troubles due to wear, resulting in a lot of trouble and costs for maintenance. .

  In addition, because the saddle stitching sheet bundle is stopped one by one for forming the back square, there is a limit to increasing the processing speed, and the efficiency is not increased when a large amount of processing is required. There's a problem.

Similarly, in the second example, the clamper opening / closing drive mechanism, the stopper advance / retreat drive mechanism, and the back pressing roller travel drive mechanism are necessary, which increases the complexity and cost of the apparatus, and increases maintenance costs and labor. In addition, there is a problem that the processing efficiency does not increase because the half-fold booklet is stopped one by one and the forming process is performed.
An object of the present invention is to solve the problems in the above-described conventional technology.

In order to solve the above-mentioned problems, the present invention has the following means configurations.
A first configuration (basic configuration) of the present invention is a half-fold booklet square spine forming device including the following means.
(A) A side pressing roller on which the belt is stretched and a belt driving roller for circulating the belt are erected on the frame so that the plane of the belt is pressed against the side of the folded booklet. A mechanism in which a belt is stretched between a roller and a belt driving roller, and the two pressing mechanisms (b) hold the two pressing mechanisms so that the side surface pressing rollers face each other through the belt surface. Holding housing (c) Pressurizing means for pressurizing one or both pressing mechanisms in the direction in which the opposing belt surfaces of the two opposedly held pressing mechanisms approach each other (d) Width direction of the opposing belt surfaces The back portion pressing roller in which the back of the half-folded booklet that is pressed between the belt surfaces enters and rotates with the direction in which the belt surfaces face each other as the rotation axis direction.

  According to a second configuration of the present invention, in the first configuration, the side surface pressing roller is configured such that a plurality of rollers are erected in a line with the belt-side rotational contact surface as the same plane. It is a half-fold booklet corner back forming apparatus.

  According to a third configuration of the present invention, in the first configuration or the second configuration, a plurality of back pressing rollers are provided along the running direction of the belt. It is.

  A fourth configuration of the present invention is the half-folded booklet corner back-forming device characterized in that, in the third configuration, the back pressing roller is in an inclined array that approaches the belt as the downstream side of the belt travels. is there.

  According to a fifth configuration of the present invention, in any one of the first to fourth configurations, the shaft position of the back pressing roller is shifted to the downstream side in the belt traveling direction from the shaft position of the side pressing roller. This is a half-fold booklet corner-back forming apparatus characterized by the above.

  According to a sixth configuration of the present invention, in any one of the first to fifth configurations, the axial position of the first back pressing roller in the belt traveling direction is greater than the axial position of the second side pressing roller from the upstream side. Is a half-folded booklet spine forming apparatus characterized by being also on the downstream side.

  According to a seventh configuration of the present invention, in addition to any one of the first to sixth configurations, the belt interval is changed in a state where there is no booklet between the belts and the belt is biased by the pressurizing unit. It is a half-fold booklet square spine forming device characterized by comprising a mechanism interval adjusting means capable of performing the above.

  In an eighth configuration of the present invention, in addition to the seventh configuration, an expansion mechanism that further expands or restores the belt interval set by the mechanism interval adjustment means by a predetermined dimension, and the arrival of the folded booklet When the center folded booklet reaches the position of the first side pressing roller, it is detected and returned to the original position, and when the middle folded booklet passes through the position of the last side pressing roller. And an expansion control means for detecting this and performing expansion control again.

  According to a ninth configuration of the present invention, in addition to any one of the first to eighth configurations, a position in the belt width direction of the back of the half-fold booklet entering between the opposing belts is defined. It is a half-fold booklet square back forming apparatus characterized by comprising a back position defining guide.

  According to a tenth aspect of the present invention, there is provided the half-folded booklet corner back forming apparatus according to the ninth structure, wherein the specified position of the back position defining guide is adjustable.

  According to an eleventh configuration of the present invention, in addition to any one of the first to tenth configurations, in order to narrow down the folding thickness of the half-fold booklet entering between the opposing belts, It is a half-fold booklet square spine forming device comprising an insertion guide member composed of both side walls whose intervals are narrowed.

The twelfth configuration of the present invention includes, in addition to any one of the first to eighth configurations cited in the first to eighth configurations and the eleventh configuration, an upstream of the mechanism holding casing. The booklet conveying direction changer having the following configuration is a half-folded booklet square spine forming device.
(A) First conveying means for conveying the folded booklet from a direction orthogonal to the conveying direction by the pressing unit (b) Receiving the middle folded booklet conveyed by the first conveying means and conveying it in the conveying direction of the pressing unit The second conveying means (c) The back position defining guide for defining the back position of the half-fold booklet conveyed onto the second conveying means (d) The booklet of the back position defining guide in the first conveying means conveying direction Adjustment means for adjusting the stop position and the orientation of the booklet in the conveyance of the second conveyance means

  According to a thirteenth configuration of the present invention, the booklet transport direction changing device of the twelfth configuration further includes a folding thickness suppressing means for suppressing the folding of the folded folding booklet. It is.

  In a fourteenth configuration of the present invention, the folding thickness suppressing means of the thirteenth configuration detects that the back of the half-folded booklet on the second transport means has come into contact with the back position defining guide, An upper pressing member that presses down the folding fold of the booklet from above, and a pressing member control unit that controls to lower the upper pressing member and press the bulging of the middle folded booklet when the sensor detects contact. This is a half-folded booklet corner back forming apparatus.

  According to a fifteenth configuration of the present invention, the folding thickness suppressing means of the thirteenth configuration detects that the back of the half-folded booklet on the second conveying means is in contact with the back position defining guide, An upper pressing member that holds down the folding of the booklet from above, a lower pressing member that holds down from below, and when the sensor detects contact, the upper pressing member is lowered and the lower pressing member is raised to suppress the swelling of the middle folded booklet. It is a half-fold booklet square spine forming device characterized by comprising a pressing member control means for controlling as described above.

  According to a sixteenth configuration of the present invention, in the first to fifteenth configurations, the surface of the belt contacting the roller is provided with one or more rows of grooves in the longitudinal direction of the belt, and the belt driving roller, side surface It is a half-fold booklet square spine forming device characterized by having a groove that fits with a groove of a belt on the outer periphery of all or part of the pressing roller.

  A seventeenth configuration of the present invention is the half-folded booklet spine forming device according to any one of the first to sixteenth configurations, wherein the diameter of the belt driving roller is larger than the diameter of the side pressing roller. .

The basic configuration (first configuration) of the booklet square spine forming apparatus of the present invention is that the two pressing mechanisms in which the belt is stretched between the side pressing roller and the belt driving roller are opposed to the belt holding surface to the mechanism holding housing. It is held and urged by the pressing means in the direction in which the opposing belt surfaces approach each other.
Therefore, when the belt is circulated so that the opposite surfaces run in the same direction, the folded booklet that is interposed between the opposite belt surfaces is pressed and clamped from both sides and conveyed in the belt running direction. It will be.

  On the other hand, since a back portion pressing roller whose rotation direction is the opposite direction is rotatably provided on either side of the width direction of the opposite belt, the folded booklet that is conveyed while being pressed and clamped by the belt If the spine protrudes beyond the back pressing roller, it is shaped to ride on the back pressing roller, and the reaction force from the back pressing roller causes the rounded booklet's back to be flattened and flattened. The back of the will be formed. At this time, the strength of the spring is made strong so that the entire folded booklet is not displaced between the belts by the reaction force from the back pressing roller.

As is apparent from the above operation, if the belt is circulated, the square back is formed only by transporting the half-fold booklet by the belt without moving any other part.
That is, there is no movable part or drive mechanism for performing reciprocating motion such as a clamper opening / closing drive mechanism, a stopper advancing / retreating mechanism, and a back portion pressing roller driving mechanism as in the conventional apparatus. Only the one-way rotational drive that causes the belt to travel only in one direction exists as a movable part.
Therefore, there is an advantage that the apparatus becomes very simple as compared with the conventional apparatus and the manufacturing cost is low.
In addition, since there are no movable parts that reciprocate and there is little wear and no reaction force is applied, there are few failures and maintenance labor and costs are greatly reduced.

  Furthermore, each part of the device does not move or stop every time a book is formed as in the case of the conventional device, and if the belt is circulated, it will be continuously formed because it is formed by simply passing it. Therefore, there is a remarkable advantage that the molding process can be performed so as to flow, the processing speed can be dramatically increased, the speed can be increased and the system can be brought online, and the production efficiency can be increased.

  In the second configuration, by using a plurality of side surface pressing rollers, there is an advantage that the belt clamping range with respect to the folded booklet is widened and the clamping is further ensured, and the reaction force of the back pressing roller can be fully utilized. is there.

  In the third configuration, there is an advantage that the back portion can be made more rectangular by using a plurality of back portion pressing rollers.

  In the fourth configuration, by making the position of the plurality of back portion pressing rollers closer to the belt as the downstream side of the belt travels, it becomes possible to perform stepwise pressing, and the effect of providing the plurality can be further exhibited. There are advantages.

  In the fifth configuration, by shifting the shaft position of the back portion pressing roller to the downstream side in the belt traveling direction from the shaft position of the side surface pressing roller, it is possible to reliably perform the procedure of pressing from the back surface after pressing from the side surface. Thus, there is an advantage that molding conforming to the principle can be performed.

  In the sixth configuration, since the back portion pressing is started while being firmly sandwiched between at least two side surface pressing rollers, a more stable molding effect can be obtained.

  In the seventh configuration, by providing the mechanism interval adjusting means, it is possible to adjust the interval between the belts pressed by the pressurizing means in the state where there is no booklet. There is an advantage that the belt interval suitable for the thickness of the folded booklet can be obtained.

In the eighth configuration, when the booklet reaches the position of the first side pressing roller, the spread mechanism is wider than the interval set by the mechanism interval adjusting means before the center folded booklet arrives. Therefore, the interval set by the mechanism interval adjusting means is set to an interval that is narrower than the thickness of the booklet so that the booklet can be surely pressed, and the booklet is positioned at the position of the first side pressing roller. Until this occurs, it is easy to enter until the booklet reaches the position of the side pressing roller by setting the interval wider than the thickness of the booklet by the expansion mechanism, and after the entry is detected, the corner is firmly pinched. There is an advantage that back molding is performed.
When it has passed the position of the last side pressing roller, it is also detected and spreads again to prepare for the arrival of the next booklet, so that there is an advantage that molding is performed efficiently.

  In the ninth configuration, the back position value defining guide for defining the back position of the half-folded booklet entering between the belts is provided, so that the belt can be stably positioned at an appropriate position with respect to the back pressing roller. There is an advantage that it can be held.

  In the tenth configuration, the specified position of the back position defining guide provided in the ninth configuration can be adjusted, so that there is an advantage that an optimum position for the square spine molding can be selected.

  In the eleventh configuration, since the insertion guide member composed of the both side walls whose distance is narrowed as it moves forward is provided before the advance between the opposite belts, it is thicker due to the restoring force of the folded portion of the center folded booklet. Even if a booklet swelled in the direction comes, there is an advantage that when entering between the belts, it can be smoothly entered with a suitable thickness.

In the twelfth configuration, the booklet transport direction conversion device can convert the transport direction of the booklet into the orthogonal direction without changing the direction of the booklet, so that the half-fold booklet is transported from the direction orthogonal to the direction of the booklet flow in the pressing unit. Even if it is done, the direction can be changed so that it can enter straight between the belts of the pressing unit.
Therefore, due to the arrangement with the bookbinding device, even if the folded booklet is transported with the back as the head, it is transported in the direction along the back without changing the orientation of the booklet by the direction changing device. It is possible to enter the pressing unit as it is. After all, there is an advantage that the restriction of the arrangement relationship with the bookbinding apparatus can be solved.

  In addition, the booklet transport direction changer is provided with a back position defining guide and its adjusting means, so that the delicate relative positional relationship and inclination with the pressing unit can be adjusted, and the corner back forming is performed in the best condition. There is.

  In the thirteenth to fifteenth configurations, the thickness of the half-fold booklet that is folded in two by binding the crease part with yarn or needle binding is inevitably generated by the restoring force when the number of pages is large or the paper is stiff The bulge in the taste direction can be controlled, and there is an advantage that the entry between the pressing units becomes smooth.

  In the sixteenth configuration, the belt and the roller have grooves, so that the booklet is sandwiched between the belts on both sides and travels on the back pressing roller, and the reaction force is applied in the width direction of the belt (the axial direction of the roller). There is an advantage that the belt does not slip even if it is received.

  In the seventeenth configuration, there is an advantage in that the diameter of the belt driving roller is increased, so that the circularly inclined portion of the incoming in-fold booklet is increased and the entry between the belts becomes smooth.

In the device of the present invention, the back part is flattened by running the center folded booklet while pressing the back of the center folded booklet sandwiched between the belts against the back part pressing roller. It is important to prevent the center folded booklet from being displaced in the belt width direction by the reaction force.
For that purpose, there is no axial displacement between the belt and the side pressing roller, and there is no displacement between the belt surface and the booklet.

As the best mode for that purpose, the belt, the side surface pressing roller, and the belt driving roller are best provided with grooves.
The grooved area increases the contact area and friction coefficient between the roller and the belt, ensures transmission of the rotational force from the belt drive roller to the side pressure roller, and holds the folded back booklet in the side pressure roller. When caught on the pressure roller, the belt does not shift in the direction of the rotation axis of the roller.

To prevent the booklet from slipping in the opposite belt holding the booklet, select a belt material with a large friction coefficient on the surface in contact with the booklet, and increase the force of the pressurizing means to hold the booklet. It is best to make it large.
Further, it is preferable that a plurality of side surface pressing rollers are provided so that the pressing points against the booklet are increased to be uniform, and the clamping pressure is increased.

  The belt driving roller is preferably provided with a main driving roller and a driven roller having a diameter larger than that of the side pressing roller on the inlet side and the outlet side of the side pressing roller row. By doing so, the side-folding booklet can be smoothly advanced between the belts, particularly on the entrance side, and by reducing the diameter of the side pressing roller, a large number of side pressing rollers can be provided in a limited space. The effect can be improved.

In addition, a plurality of back pressure rollers are provided, and the positions of the back pressure rollers are inclined so that they approach the belt as the belt travels downstream, and the axial positions of the back pressure rollers are more downstream than the axial positions of the side pressure rollers. It is best to be slightly off.
Furthermore, the best embodiment is provided with a mechanism interval adjusting means, a back position defining guide whose regulation position is adjustable, an insertion guide member, and the like.

Embodiments of the half-fold booklet corner forming apparatus of the present invention will be described below with reference to the drawings.
FIG. 1 is a diagram showing a configuration of an embodiment of the present invention. (A) is a figure which shows arrangement | positioning of the roller of the two press units 2a and 2b which oppose in the unit holding | maintenance housing | casing 1, and a belt. (B) is the cross-sectional schematic which looked at the figure of (a) from the downward direction.
The pressing unit 2a is provided with belt driving rollers 3a and 4a and a plurality (five in the figure) of side pressing rollers 5a, and a belt 6a is stretched around these rollers. The rows of the side pressing rollers 5a are linearly arranged so as to be in contact with the linear belt 6a stretched from the belt driving rollers 3a to 4a.

Also on the pressing unit 2b, belt driving rollers 3b and 4b and a plurality of side surface pressing rollers 5b are provided so as to be exactly symmetrical with the pressing unit 2a, and the belt 6b is stretched over the belt.
Accordingly, the portions of the belts 6a and 6b that hang over the side pressing rollers 5a and 5b face each other. The pressing unit 2a is fixed to the unit holding housing, and the pressing unit 2b can be moved in the left-right direction by the roller 7 ((b) in FIG. 1) and between the pressing unit 2a and the unit holding housing 1. It is elastically urged toward the pressing unit 2a by a repulsion spring 8 which is a pressurizing means provided in.

  Therefore, if there is no stop mechanism (stopper), the belt 6b in contact with the side pressing roller 5b will be in close contact with the belt 6a in contact with the side pressing roller 5b of the pressing unit 2a. In this embodiment, as shown in FIG. 1B, the pressing unit 2 b is provided with a locking projection 9, and the locking projection 9 stops with respect to the stopper 10. The position of the stopper 10 is adjustable by an adjustment screw 11. Therefore, by adjusting the adjustment screw, the belt 6b can be stopped at an interval before the belt 6b comes into close contact with the belt 6a.

This interval is set to be narrower than the thickness of the half-folded booklet to be square-backed. When the half-folded booklet enters, it is expanded by its thickness, and the half-folded booklet is sandwiched between the belts 6 a and 6 b by the repulsive elastic biasing force of the repulsive spring 8.
Alternatively, after the above setting, before the center-folded booklet reaches the side pressing roller, the booklet can easily enter with a space slightly larger than the thickness of the booklet, and after the booklet reaches the side pressing roller, It can also be made.

  FIG. 5 shows a structure in which a bracket 30 and an eccentric cam 31 are provided on the stopper 10 shown in FIG. The distance between the belts 6a and 6b is narrower when the cam 31 is in the state (a) than in the state (b). Therefore, in the state of (a), adjustment is made with the adjusting screw 11 of FIG. 1 (b) so that the distance between the belts 6a, 6b is narrower than the thickness of the center folded booklet 13, and the eccentric cam 31 of FIG. (B), the pressing unit 2b moves to the right, so that the distance between the belts 6a and 6b is increased. The dimension of the eccentric cam 31 is determined so that the expanded interval becomes larger than the thickness of the center folded booklet 13.

  The operation of the eccentric cam 31 is in the state of FIG. 5B when the tip of the center folded booklet does not reach the position of the ingress sensors 32a and 32b in FIG. 6b is wide and reaches the position of the ingress sensors 32a and 32b, or after the elapse of a predetermined time after reaching the position of the ingress sensors 32a and 32b, the front end of the half-fold booklet reaches the vicinity of the first side pressing roller. In this case, the motor connected to the rotating shaft of the eccentric cam 31 is not expanded so that the state (b) is changed to the state (a) (the state in which the distance between the belts 6a and 6b is narrow). Controlled by an open control circuit.

When the rear end of the half-folded booklet 13 that has passed between the belts 6a and 6b and has undergone square-back molding has passed between the discharge sensors 33a and 33b, the eccentric cam 31 is again in the state shown in FIG. From (b) to (b), control is made to prepare for the entry of the next half-fold booklet 13.
The ingress sensors 32a and 32b and the discharge sensors 33a and 33b are composed of a light emitting element and a light receiving element, and the light receiving element outputs an electrical signal when the light ray is blocked or opened from the blocked state. In response to this electrical signal, an expansion control circuit (not shown) controls the motor or electromagnetic solenoid connected to the eccentric cam 31 to rotate the eccentric cam 31.
The eccentric cam 31 may be used to expand the belts 6a and 6b while being substantially parallel to each other, or an eccentric cam 31 is provided in the vicinity of the entrance where the folded booklet 13 enters between the belts 6a and 6b. You may comprise so that only the entrance vicinity may be expanded.

  On the other hand, as shown in FIG. 1B, the belt driving roller 4a is connected to a motor 12 for rotational driving, and the belt driving roller 4a is rotated in the direction of the circular arc arrow in FIG. By this rotation, the belt 6a travels in the direction of the arrow, rotates around the belt driving roller 3a, and returns to the belt driving roller 4a through the side surface pressing roller 5a.

  When the half-folded booklet 13 enters between the belts 6a and 6b from the insertion guide member 14 to the state where the belt 6a is circulating, the belt 6b is pushed rightward, whereby the middle-folded booklet 13 is moved to the belt 6b. Is pressed against the belt 6a by the elastic biasing force of the repulsion spring 8, so that it is brought into close contact with the belt 6a and conveyed downward by the belt 6a. At this time, since the belt 6b is also in close contact with the center folded booklet 13, the belt 6b travels with the center folded booklet 13 and circulates with the belt driving rollers 3b and 4b and the side surface pressing roller 5b.

  Thus, the half-folded booklet is nipped and conveyed by the belt 6a hanging on the side pressing roller 5a and the belt 6b hanging on the side pressing roller 5b by the elastic biasing force of the repulsion spring 8.

  The center folded booklet 13 is provided with the back pressing roller 17 so that the back part is crushed and flattened by the back pressing roller 17 while being held by the belts 6a and 6b. Appropriate dimensions are taken out from the belts 6a and 6b to be held (below the belts 6a and 6b in FIG. 1). The positioning may be performed by visual adjustment, but when high speed and stability are required, it is preferable to provide a guide for defining the position of the back.

FIG. 2 is a view of a booklet entry portion viewed from the side.
A back position defining guide 15 is provided at a position lower than the lower edge of the belt 6a, 6b by a dimension d, and the half-fold booklet 13 is placed on the back position defining guide 15 so that the back portion of the center folded booklet 13 is placed on the belt 6a, 6b. To enter between. The introduction between the belts 6a and 6b is provided with an insertion guide member 14 composed of both side walls (see FIG. 1A) whose intervals become narrower as they advance.
Since the optimum value of the dimension d varies depending on the paper thickness and the number of pages, the position adjusting means 16 is provided so as to easily cope with them.
The axial position of the first back pressing roller 17a is such that the booklet is firmly sandwiched between at least two side pressing rollers on the downstream side of the second side pressing roller shaft from the upstream side. Since pressing is started, more stable molding can be obtained.

FIG. 3 shows a state in which the tip of the back portion 18 of the half-folded booklet 13 which is sandwiched and conveyed by the belts 6a and 6b is approaching the back portion pressing roller 17a.
The distance between the back pressing roller 17a and the belts 6a and 6b is set smaller than the dimension d. Accordingly, when the half-folded booklet 13 advances as it is, the back portion 18 rides on the back-side pressing roller 17a, but the middle-folded booklet 13 is firmly held between the belts 6a and 6b and does not move upward, and the back-side pressing roller 17a. Since the shaft position is also fixed, the rounded back 18 when viewed in cross section is crushed by the reaction force of the back pressing roller 17a. That is, the round back becomes close to a flat back.

In FIG. 3, the back portion pressing rollers 17b and 17c are provided on the downstream side of the back portion pressing roller 17a so that the distance from the belts 6a and 6b is gradually narrowed. Therefore, the back portion pressing rollers 17b and 17c are further crushed and flattened. It will be.
As described above, when a plurality of back portion pressing rollers are provided, the forming effect can be increased by adopting an inclined array that gradually approaches the belts 6a and 6b as the position becomes lower.

Further, by shifting the rotational shaft positions S1, S2, and S3 of the back portion pressing rollers 17a, 17b, and 17c to the downstream side of the respective shafts P of the side surface pressing rollers as shown in FIG.
This is because the force with which the belts 6a and 6b sandwich the folded booklet is the strongest at the axial position of the side pressing rollers 5a and 5b, so it is better to receive the reaction force of the back pressing roller 17 immediately after the strongest clamping. This is because molding is more reliable than in the immediately preceding case.
In this way, the half-fold booklet whose back portion is formed into a square shape is conveyed and discharged as it is.

FIG. 4 is a view showing the structure of the side pressure roller and belt driving roller used in this embodiment, and a sectional view of the belt.
(A) is a side view of a roller, (b) is a top view, and (c) is a sectional view of a belt.
The feature is that it has a V-shaped groove. With this grooved structure, the contact area between the belt and the roller is widened, slip does not occur, the rotation of the belt driving roller is reliably transmitted to the belt, and the running of the belt is reliably transmitted to the roller.

  Further, in the present invention, when the folded booklet 13 is sandwiched between the belts 6a and 6b and hits the back pressing rollers 17a, 17b and 17c during traveling, it receives a force to push up by a reaction force. At this time, the belts 6a and 6b sandwiching the half-folded booklet also receive a pushing force in the axial direction. However, since they are V-shaped grooves, there is no deviation in the axial direction, and molding is performed reliably. The shape of the groove is not limited to the V shape, and may be a round shape, a trapezoidal shape, or the like.

  As described above, the grooved roller and belt are very excellent in that the transmission of the rotational force is good and the axial displacement does not occur, but the desired performance can be obtained by other structure or surface treatment. If it is possible, it is not limited to the V-groove type.

In this embodiment, two identical pressing units are used. In FIG. 1, the left one is fixed to the unit holding housing 1 and the right one is movable by a roller 7. The two units are the same. For example, the left belt drive rollers 3a and 4a and the side pressure roller 5a may be provided on a housing or a structure fixed to the housing.
The point is that the side pressing roller 5a and the belt 6a, the side pressing roller 5b, and the belt 6b face each other, and any structure that can travel while sandwiching the folded booklet 13 may be used.

In addition, the roller 7 and the repulsion spring 8 are used as means for pressing the pressing unit 2b so that the pressing unit 2b can be moved. Other structural methods can be applied, the spring may be a repulsion spring, a tension spring that is pulled from the opposite side, or the number and position of the springs are not limited.
Further, instead of a spring, pressurizing means using an air cylinder may be used, and in an embodiment in which the embodiment shown in FIG. It may be a weight.
In short, any means capable of pressurizing the pressing unit 2b toward the pressing unit 2a may be used.

The locking protrusion 9 and the stopper 10 shown in FIG. 1B are means for stopping the pressing unit 2 b that is urged by the repulsion spring 8 and moves to the left. The position is adjusted.
Therefore, this means means for adjusting the unit interval when the booklet has not entered. Needless to say, the belt 6a along the side pressing roller 5a of the pressing unit 2a and the belt along the side pressing roller 5b of the pressing unit 2b. The interval of 6b is adjusted.

When the position of the stopper 10 is moved to the left, the belt 6b is finally pressed against the belt 6a.
When the entering middle folded booklet is thin, the belt 6b is smoothly held between the belts even when the belt 6b is pressed against the belt 6a, but when the middle folded booklet becomes thicker, it enters between the belts. It becomes difficult to go.

Therefore, when the thickness of the half-fold booklet to be square-backed is known in advance, the belt interval is set to an interval slightly smaller than the booklet thickness by adjusting the adjustment screw 11.
Then, the half-folded booklet is smoothly taken in between the belts, and when taken in, the belt interval is widened. This means that the pressing unit moves to the right, so that the locking projection 9 is separated from the stopper 10. The elastic biasing force of the repulsion spring 8 is applied to the belt 6b as it is, and the half-fold booklet is strongly held.

  In this embodiment, a structure such as the locking projection 9, the stopper 10, and the adjusting screw 11 is adopted as the unit interval adjusting means. However, the structure is not limited to such a structure, and the pressure is applied in the movable direction. Any mechanism may be used as long as the pressing unit has a structure in which the movement is stopped within the movable range and the stop position is adjustable.

FIG. 6 shows an embodiment of the twelfth configuration of the present invention, which has a booklet transport direction changer 34 on the upstream side (booklet entry side) in a state where the unit holding housing of FIG. It is a schematic plan view which shows the structure of the half-fold booklet square back shaping | molding apparatus of a structure.
In the figure, the bookbinding machine 39 is not a configuration of the invention, but when the booklet 39 from the bookbinding machine 39 is to be square-backed, the booklet folding machine lies with its folded binding side first (upward in the figure). In this state, it is conveyed by the conveyor belt 38.
Therefore, the unit holding housing 1 must also have a configuration in which the one shown in FIG. 1A is tilted to the right side so that a booklet lying on its side can enter.
In addition, in order to form a square back with the unit holding housing 1, it must enter in the direction of the folded binding side of the booklet.
However, since the booklet conveyed from the bookbinding machine 39 is conveyed with the folding side as the head, the unit holding housing 1 cannot receive the square back molding unless the conveyance direction is changed.

  Therefore, direction change is attempted by a booklet conveyance direction changer (hereinafter simply referred to as a direction changer) 34. The half-folded booklet conveyed by the conveying belt 38 of the bookbinding machine 39 is taken over by the conveying belt 37 of the direction changer 34 and advances as it is, and further, slightly above the upper surface of the substrate 53 from the hole 42 provided in the substrate 74. The plurality of cylindrical rollers 36 appearing at the top of the roller 36 are advanced by the free rotation of the rollers, and the folded binding side comes into contact with the back position defining guide 40 and stops. Next, a plurality of pushers 35 protruding from the space between the cylindrical rollers 36 toward the front side of the drawing press the right side of the half-folded booklet to the left, so that the folded binding side is moved to the left unit holding housing 1. Can come into contact with the back pressing rollers 17a, 17b, and 17c.

In this way, it is possible to form the square folded booklet that is discharged from the bookbinding machine 39 in the opposite direction.
The position of the back position defining guide 40 is desirably adjusted according to the paper quality of the booklet and the number of sheets to be bound, so that when the folding side of the half-folded booklet is in contact with the booklet, the corner back is formed well. Adjustment means 41 is provided.

FIG. 7 is a detailed view of the adjusting means 41.
First, cam plate drive knobs 45 are rotatably provided at two positions on the left and right sides of the fixed plate 44 in a state of being connected to a pinion 46, and a rack 47 is engaged with the pinion 46 and is integrated with the cam plate 49. The cam plate 49 is supported by two support pins 43 so as to be movable left and right. The lower side of the cam plate 49 is inclined. On the other hand, a movable plate 48 that has elongated holes 52 on the left and right sides and is movable back and forth (up and down in the drawing) by the length of the elongated holes is attached to the fixed plate 44 by a guide fixing thumbscrew 51. When the guide fixing thumbscrew 51 is loosened, it can move, and when it is tightened, it is fixed.

Cam followers 50 are provided at two positions on the left and right of the movable plate 48, at positions corresponding to the cam plate 49.
Further, both ends of the movable plate 48 are urged backward (upward in the drawing) by a tension spring 53. Therefore, when the guide fixing thumbscrew 51 is loosened, the cam follower 50 comes into contact with the inclined portion of the cam plate 49. When the cam plate drive knob 45 is turned in this state, the cam plate 49 moves left and right, and the cam follower 50 and hence the movable plate 48 move up and down by the inclined side. Since the back position defining guide 40 is attached so as to be in close contact with the movable plate 48, it moves together.
Then, if the left and right cam plate drive knobs 45 are turned by the same amount, the back position defining guide 40 moves back and forth while maintaining the orientation, and if the left and right turn amounts are different or if only one is turned, the orientation is changed. Since it can be changed, fine adjustments can be made according to the number of half-folded booklets and paper quality.

8 to 11 are diagrams showing the configuration of an embodiment of the fourteenth configuration which is a specific example of the thirteenth configuration of the present invention.
It is the 1st example which provided the folding thickness suppression means in the booklet conveyance direction changer 34 of FIG.
The half-fold booklet is fed through the folding process after binding the folded part (usually the middle) of the stacked papers, but after the number of papers is large or the paper is stiff, the resilience of the paper Thus, swelling occurs in the thick direction of the half-fold booklet. When this bulge becomes large, the entry between the right and left side pressing belts for forming the back of the corner is obstructed. For this reason, the bulge is intended to be suppressed by the booklet transport direction changer before being sent to the square spine forming process.

FIG. 8 is a view of the hole 42 and the back position defining guide 40 of the booklet transport direction changer 34 of FIG. 6 as viewed from the unit holding housing 1 side.
The half-folded booklet 13 swelled on the cylindrical roller 36 is stopped by abutting the folded binding side (left side) against the back position defining guide 40. When contact is detected by a sensor (not shown) (for example, a sensor in which a light emitting element and a light receiving element are placed up and down just before the back position regulation guide), a control circuit (not shown) The first lever 61 pulls down the second lever 58 with the rotation shaft 59 as the rotation center. The right end of the second lever 58 is engaged with a pin 57 provided on the block 55 and pulls down the block 55 guided by the guide 56. An upper pressing member 54 is attached to the block 55, and the upper pressing member 54 is also lowered by the lowering of the block 55, and the lower end of the upper folding member 13 is close to the upper side of the substrate 74 (not shown). The fold of the center folded booklet 13 is eliminated by ensuring the pressing and folding.

FIG. 9 is a diagram showing a state in which the upper pressing member 54 presses near the folding side of the half-folded booklet 13 and the swelling does not occur.
The half-folded booklet 13 which has been swelled in this way is pushed by the pusher 35 for forming the spine and can smoothly enter between the pressing units 2a and 2b.

FIG. 10 is a view of the state before the upper pressing member 54 of FIG. 8 is lowered as seen from the right side.
The half-fold booklet 13 is on the cylindrical roller 36 and is still swelled.

  FIG. 11 is a view showing a state in which the upper pressing member 54 has been lowered from the state of FIG. 10 and has been flattened by suppressing the swelling of the folded booklet 13.

12 to 15 are diagrams showing the configuration of an embodiment of the fifteenth configuration which is a specific example of the thirteenth configuration of the present invention.
In the fourteenth configuration, the pressing member is only the upper pressing member 54 from above, whereas in the fifteenth configuration, the folded booklet 13 is pressed from both the upper and lower sides.

FIG. 12 is a diagram showing a state where the pressing operation is not performed as in the case of FIG.
The lowering operation of the upper pressing member 64 is the same as in the case of FIG. The raising operation of the lower pressing member is shown in FIGS.
First, both the upper pressing member 64 and the lower pressing member 65 are freely rotating and are attached to an upper pressing member mounting plate 75 and a lower pressing member mounting plate 73, respectively. As shown in FIGS. 14 and 15, the lower holding member 65 is moved up and down by pulling a reciprocating rod 67 by an electromagnetic solenoid 69 so that a lever 68 pivotally supported by the fixed shaft 66 rises counterclockwise. By pushing up the lower pressing member mounting plate 73 with the head, the half-folded booklet 13 is pressed from below.

The vertical movement is guided by the fact that the guide elongated hole 72 provided in the guide plate 70 attached to the lower pressing member 65 is engaged with the fixed guide pin 71.
The lowering of the upper pressing member 64 and the lowering of the lower pressing member 65 are performed simultaneously. This is performed by controlling the electromagnetic solenoid 69 of FIG. 14 and the electromagnetic solenoid 62 of FIG. 12 to be driven simultaneously.

  In the embodiment of the fourteenth configuration, as shown in FIGS. 13 and 15, the upper presser member 64 and the lower presser member 65 hold the center folded booklet 13 with the pusher 35 and the center folded booklet 13 of the unit holding housing. Push towards you. When the half-folded booklet is separated from the pressing member, the upper pressing member 64 is raised by the tensile force of the spring 60 by turning off the driving of each electromagnetic solenoid, and the lower pressing member 65 is the lower pressing member. Due to its own weight including the mounting plate 73, the bulge suppression is completed.

FIG. 13 is a diagram illustrating a pressing operation from the state of FIG.
FIG. 14 is a view of the state where the pressing operation of FIG. 12 is not performed as viewed from the right.
The half-fold booklet 13 is on the cylindrical roller 36 and is still in a swelled state.

FIG. 15 is a view of the state in which the pressing operation of FIG. 13 is performed as viewed from the right side.
The half-fold booklet 13 is in a state where the folding surfaces are in close contact.

It is a block diagram of the Example of this invention apparatus. It is the figure of the booklet approach part seen from the left side surface of the Example of FIG. It is a figure which shows the state which the back part front-end | tip of the half-fold booklet which was clamped and conveyed by the belt was approaching the back part press roller. It is a figure which shows the groove structure of the belt drive roller used in the Example of this invention, the side surface pressing roller, and the cross-sectional structure of a belt. It is a figure which shows the structure of the expansion means which expands the belt space | interval set with the adjustment screw of FIG. It is an arrangement | positioning top view of the center folded booklet square back shaping | molding apparatus containing the booklet conveyance direction converter of the 12th structure of this invention. FIG. 7 is a detailed plan view of an adjusting means for adjusting the position and inclination of the back position defining guide of FIG. 6. The figure which shows the state which has not yet performed pressing operation with the 14th structure of this invention which provided the folding thickness suppression means in the booklet conveyance direction converter which hold | suppresses the swelling of a half-fold booklet from the booklet upper direction. is there. It is a side view which shows the state which suppressed the swelling of the center folded booklet from the state of FIG. It is the front view which looked at FIG. 8 from the right side. It is the front view which looked at FIG. 9 from the right side. FIG. 15 is a side view of the fifteenth configuration of the present invention in which folding thickness suppressing means for pressing a bulge of a half-folded booklet from both above and below the booklet is provided on the booklet transport direction changer, showing a state where no pressing operation has been performed yet. It is a figure. It is a side view which shows the state which suppressed the swelling of the center folded booklet from the state of FIG. It is the front view which looked at FIG. 12 from the right side. It is the front view which looked at FIG. 13 from the right side. It is a figure which shows the 1st example of the conventional half-fold booklet square back shaping | molding apparatus. It is a figure which shows the 1st example of the conventional half-fold booklet square back shaping | molding apparatus. It is a fragmentary figure of the 2nd example of the conventional half-fold booklet corner back shaping | molding apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Unit holding | maintenance housing | casing 2a, 2b Press unit 3a, 3b Belt drive roller 4a, 4b Belt drive roller 5a, 5b Side surface press roller 6a, 6b Belt 7 Roller 8 Repulsion spring 9 Locking protrusion 10 Stopper 11 Adjustment screw 12 Motor 13 Medium Folded booklet 14 Insertion guide member 15 Back position regulation guide 16 Position adjustment means 17a, 17b, 17c Back part pressing roller 18 Back part 21a, 21b Clamper 22 Saddle stitching sheet bundle 23 Blade 24 Stopper 25 Back part pressing roller 26 Conveying means inlet 27 Conveying means 28a 28b Pulley 29 Belt 30 Bracket 31 Eccentric cam 32a, 32b Ingress sensor 33a, 33b Discharge sensor 34 Booklet transport direction changer 35 Pusher 36 Cylindrical roller 37 Transport belt 38 Transport belt 39 Bookbinding machine 40 Back position control Guide 41 Adjusting means 42 Hole 43 Support pin 44 Fixed plate 45 Cam plate drive knob 46 Pinion 47 Rack 48 Movable plate 49 Cam plate 50 Cam follower 51 Guide fixing knob screw 52 Long hole 53 Tension spring 54 Upper pressing member 55 Block 56 Guide 57 Pin 58 Second lever 59 Rotating shaft 60 Spring 61 First lever 62 Electromagnetic solenoid 63 Upper fixed plate 64 Upper pressing member 65 Lower pressing member 66 Fixed shaft 67 Reciprocating rod 68 Lever 69 Electromagnetic solenoid 70 Guide plate 71 Fixed guide pin 72 Guide length Hole 73 Lower pressing member mounting plate 74 Substrate 75 Upper pressing member mounting plate

Claims (17)

A half-fold booklet square back forming apparatus comprising the following means.
(A) A side pressing roller on which the belt is stretched and a belt driving roller for circulating the belt are erected on the frame so that the plane of the belt is pressed against the side of the folded booklet. A mechanism in which a belt is stretched between a roller and a belt driving roller, and the two pressing mechanisms (b) hold the two pressing mechanisms so that the side surface pressing rollers face each other through the belt surface. Holding housing (c) Pressurizing means for pressurizing one or both pressing mechanisms in the direction in which the opposing belt surfaces of the two opposedly held pressing mechanisms approach each other (d) Width direction of the opposing belt surfaces The back portion pressing roller in which the back of the half-folded booklet that is pressed between the belt surfaces enters and rotates with the direction in which the belt surfaces face each other as the rotation axis direction.   2. The half-fold booklet corner spine forming apparatus according to claim 1, wherein the side pressing roller is a plurality of rollers standing upright in a line with the belt-side rotational contact surface as the same plane.   3. The half-folded booklet corner back forming apparatus according to claim 1, wherein a plurality of back portion pressing rollers are provided along a running direction of the belt.   4. The half-folded booklet corner forming apparatus according to claim 3, wherein the position of the back portion pressing roller is an inclined array that is closer to the belt toward the downstream of the belt travel.   5. The half-folded booklet corner back forming according to claim 1, wherein the axial position of the back pressing roller is shifted to the downstream side in the belt traveling direction from the axial position of the side pressing roller. apparatus.   The axial position of the first back pressing roller in the belt traveling direction is located downstream of the axial position of the second side pressing roller from the upstream side, according to any one of claims 1 to 5. Center-fold booklet corner back forming device.   In addition to the structure of any one of claims 1 to 6, a mechanism interval adjusting means capable of changing the belt interval in a state where there is no booklet between the belts and is urged by the pressurizing means is provided. A center-folded booklet corner back forming device.   In addition to the configuration of claim 7, an expansion mechanism that further expands or restores the belt interval set by the mechanism interval adjustment means by a predetermined dimension, and maintains the expanded state before the arrival of the half-fold booklet, When the center folded booklet reaches the position of the first side pressing roller, this is detected and restored, and when the middle folded booklet passes through the position of the last side pressing roller, this is detected and expanded again. An expansion-folding booklet square back forming device characterized by having expansion control means for performing.   In addition to the structure of any one of claims 1 to 8, a back position defining guide for defining a position in the belt width direction of the back of the half-folded booklet entering between the opposing belts is provided. A half-fold booklet corner back forming device.   10. The half-fold booklet corner back forming apparatus according to claim 9, wherein the specified position of the back position defining guide is adjustable.   In addition to the structure according to any one of claims 1 to 10, it comprises both side walls for narrowing down the folding thickness of the middle folded booklet entering between the opposing belts, and the interval is narrowed as it advances. A center-folded booklet corner back forming apparatus comprising an insertion guide member. In addition to the configuration of any one of claims 1 to 8 and claim 11 cited in claim 11, a booklet transport direction changer having the following configuration is provided upstream of the mechanism holding housing. A half-fold booklet corner back forming device.
(A) First conveying means for conveying the folded booklet from a direction orthogonal to the conveying direction by the pressing unit (b) Receiving the middle folded booklet conveyed by the first conveying means and conveying it in the conveying direction of the pressing unit The second conveying means (c) The back position defining guide for defining the back position of the half-fold booklet conveyed onto the second conveying means (d) The booklet of the back position defining guide in the first conveying means conveying direction Adjustment means for adjusting the stop position and the orientation of the booklet in the conveyance of the second conveyance means   The booklet conveyance direction changing device according to claim 12, further comprising folding thickness suppressing means for suppressing folding of the folded folding booklet.   A folding thickness suppressing means for detecting that the back of the half-folded booklet on the second transport means has come into contact with the back position defining guide; an upper pressing member for holding the folding of the middle-folded booklet from above; and a sensor 14. The half-folded booklet corner spine forming apparatus according to claim 13, further comprising a pressing member control unit that controls to lower the upper pressing member and press the swelling of the half-folded booklet when the contact is detected.   A folding thickness suppressing means for detecting that the back of the center folded booklet on the second transport means has come into contact with the back position defining guide; an upper pressing member for pressing the folding of the folded middle booklet from above; And a pressing member control means for controlling to lower the upper pressing member when the sensor detects contact and to raise the lower pressing member to suppress the swelling of the half-folded booklet. The half-fold booklet corner back forming apparatus according to claim 13.   The surface of the belt that is in contact with the roller has one or more rows of grooves in the longitudinal direction of the belt, and has a groove that fits the groove of the belt on the outer periphery of all or part of the belt driving roller and the side pressing roller. A half-fold booklet corner-back forming apparatus characterized by the above-mentioned. 17. The half-fold booklet corner spine forming apparatus according to claim 1, wherein a diameter of the belt driving roller is larger than a diameter of the side pressing roller.

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