JPH02239992A - Adhesive paste applicator for bookbinding - Google Patents

Abstract

PURPOSE:To enable bookbinding with good finish to be performed efficiently with favorable workability and through securing a stable clamping force by providing a clamp plate drive controlling part for controlling a clamp plate- driving part so as to stop the driving of a clamp plate with priority over a controlling operation based on a switch operation. CONSTITUTION:A clamper 12 has a clamp plate drive controlling part 46, which comprises, e.g. a microcomputer, and controls a clamp plate-driving motor 39. At the time of clamping a bundle of sheets of paper 11, an operating switch 48 is pressed continuedly until the gap between both clamp plates 37A, 37B becomes equal to an intermediate stopping gap t+alpha, where t is the thickness of the bundle 11 to be now clamped, and alpha is a predetermined marginal gap. Under this intermediate stopping gap condition, a deviation present in the bundle 11 is corrected by a manual operation of the operator or the like. Thereafter, the switch 48 is again turned ON to exert a predetermined reaction force on the clamp plate 37B, whereby a stable clamping force for the bundle 11 can be secured.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a bookbinding glue applicator.

[Prior Art] Conventionally, there has been known a bookbinding glue applicator that moves a bundle of sheets and applies glue to the back of the sheet bundle during the movement, and the glue applicator uses the glue to form a booklet-like bundle of sheets. We are planning to unite. That is, the glue applicator includes a clamper that clamps a bundle of sheets, a glue drum that is immersed in a glue tank, and a clamper moving device that allows the clamper to pass along the glue drum. Gluing is carried out by moving the back side of the paper bundle so as to rub it against the upper surface of the gluing drum.

By the way, the above-mentioned conventional clampers include those with a manual type and those with an automatic type.

A manual type clamper has a pair of clamps for clamping a stack of paper, and by manually moving one movable clamp plate of both clamp plates along a guide rod, the distance between both clamp plates can be expanded or contracted. A movable clamp plate, which is manually set to an appropriate paper bundle clamping position, is locked with respect to a guide rod.

The automatic type clamper has a pair of clamp plates that clamp a stack of paper, and can expand or contract the distance between both clamp plates by moving one movable clamp plate along a guide rod using a motor. When a certain reaction force is applied to the clamp plate being driven, it is determined that a predetermined clamping force has been applied to the stack of sheets, and the motor is thereby controlled so as to stop moving the clamp plate.

[Problems to be Solved by the Invention] However, the conventional manual type clamper described above has poor workability because the movable clamp plate is moved manually. In addition, since the movable clamp plate is moved manually and then locked in an appropriate position, it is difficult to apply a stable clamping force to the stack of paper.
There are inconveniences such as the paper bundle being displaced due to the reaction force from the gluing roller during the gluing stage after clamping.

On the other hand, in the conventional automatic type clamper mentioned above, the movable clamp plate is stopped moving at the timing when a certain reaction force is applied to the movable clamp plate, so it is stable even if the thickness of the paper bundle changes. It is possible to secure a clamper that is suitable for use. However, in this case, during the process of moving the movable clamp plate to the spacing reduction side, the paper stack is not continuously aligned manually by the operator, so the paper stack may become misaligned due to mechanical vibrations, etc. There is. At this time, the movable clamp plate continues to move to the final clamping position without stopping midway and completes clamping, so the above-mentioned stack of sheets is then glued in the above-mentioned misaligned clamped state, which may cause missing pages. Become.

The present invention provides the following advantages when clamping a bundle of paper in the pre-gluing stage:
To efficiently bind a book with good appearance by ensuring good clamping workability, securing a stable clamper, and completing clamping in a state that minimizes displacement of a bundle of sheets.

[Means for Solving the Problems] The present invention as set forth in claim 1 provides a clamper that clamps a bundle of sheets, a glue drum that is immersed in a glue tank, and a clamper that allows the clamper to pass along the glue drum. In a bookbinding glue applicator which has a moving device and applies glue on the glue drum to the back side of a bundle of sheets clamped by the clamper when the clamper is passed along the glue drum by the clamper moving device, The clamper includes a pair of clamp plates that clamp the paper bundle, a clamp plate drive unit that drives at least one of the two clamp plates to increase or reduce the distance between the two clamp plates, and an operation switch, which is attached to the operation switch. While the ON operation continues, the clamp plate driving section is controlled to continuously drive the clamp plate, and when a certain reaction force acts on the clamp plate being driven, the above operation is performed based on the ON operation of the operation switch. and a clamp plate drive control unit that controls the clamp plate drive unit so as to stop driving the clamp plate with priority over the control operation of the clamp plate.

The present invention according to claim 2 has a clamper that clamps a bundle of sheets, a glue drum immersed in a glue tank, and a clamper moving device that allows the clamper to pass along the glue drum, and the clamper moves the clamper. In a bookbinding glue applicator that applies glue on the glue drum to the back of a paper stack clamped by the clamper when the clamper is passed along the glue drum by the device, the clamper clamps the paper stack. It is equipped with a pair of clamp plates, a clamp plate driving section that drives at least one of both clamp roots to increase or reduce the interval between both clamp plates, and an operation switch, and the fixed time period after the ON operation applied to the operation switch is described above. The clamp plate driving section is controlled to continuously drive the clamp plate, and when a certain reaction force acts on the clamp plate being driven, the clamp plate is controlled to take priority over the above control operation based on the ON operation of the operation switch. The clamp plate drive control section controls the clamp plate drive section so as to stop driving the plate.

The present invention according to claim 3 includes a clamper for clamping a bundle of sheets, a glue drum immersed in a glue tank, and a clamper moving device for passing the clamper along the glue drum. In a bookbinding glue applicator that applies glue on the glue drum to the back of a paper stack clamped by the clamper when the clamper is passed along the glue drum by the device, the clamper clamps the paper stack. Equipped with a pair of clamp plates, a clamp plate drive unit that drives at least one of both clamp plates to increase or reduce the gap between the two clamp plates, and an operation unit that can input a signal corresponding to the thickness of the stack of paper to be clamped this time. , until the distance between both clamp plates reaches an intermediate stop interval, which is the thickness of the paper stack plus a certain extra distance, based on the signal corresponding to the thickness of the paper stack inputted from the operation section. The clamp plate drive unit is controlled to continue driving, and when the clamp plate is driven again from the intermediate stop interval state to the interval reduction side, a certain reaction force is applied to the clamp plate that is being driven. There is also a clamp plate drive control unit that controls the clamp plate drive unit so as to stop driving the clamp plate under certain conditions.

[Function] According to the present invention as set forth in claim 1, when clamping a bundle of sheets, the interval between both clamp plates is a certain extra distance α (for example, 1 to 3 m) based on the thickness t of the bundle of sheets to be clamped this time.
Continue to press the operation switch until the intermediate stop interval t+α with the addition of m) is reached.

Then, under this intermediate stop interval state, any misalignment occurring in the sheet bundle is corrected manually by the operator or by the action of an automatic alignment device attached to the clamper. Thereafter, the operation switch is turned on again to obtain a final clamping state in which a constant reaction force is applied to the clamp plate, thereby ensuring a stable clamping force on the paper bundle.

According to the present invention as set forth in claim 2, when clamping a sheet, the distance between both clamp plates is a certain extra distance α (for example, 1 to 3 m) based on the thickness t of the sheet bundle to be clamped this time.
The operating switch is operated in increments until the intermediate stop interval t+α with the addition of m) is reached. Then, under this intermediate stop interval state, the deviation occurring in the sheet bundle is corrected manually by the operator or by the action of an automatic alignment device attached to the clamper. Thereafter, by turning on the operation switch again, a final clamping state is obtained in which a constant reaction force is applied to the clamp plate, thereby ensuring a stable clamping force for the paper bundle.

According to the third aspect of the present invention, when clamping a stack of paper, a signal corresponding to the thickness t of the stack of paper to be clamped this time is inputted at the operation section. In this case, the operation unit performs operations such as: (1) inputting the current thickness itself; and (2) pressing a button switch that matches the current thickness from among a plurality of thickness input button switches. As a result, the interval between the two clamp plates is set to the intermediate stop interval t+α, which is the thickness t of the bundle of sheets to be clamped this time and a certain extra interval α (for example, 1 to 3 mm). Then, under this intermediate stop interval state, the misalignment that occurs in the paper stack is
Correction is performed manually by the operator or by the action of an automatic alignment device attached to the clamper. After that, the final clamping state in which a constant reaction force is applied to the clamp plate is obtained by re-driving the clamp plate using the operation switch provided on the operation unit, and a stable clamping force is applied to the paper stack. secure.

Therefore, in each of the inventions described in claims 1 to 3, it is necessary to minimize the deviation that occurs in the paper bundle in the final clamp state due to the short movement distance of the clamp plate from the intermediate state. I'll come.

As a result, the paper stack is glued in a stable clamped state that does not shift from the pre-gluing stage and does not slip during the gluing stage, resulting in a good-looking binding with the back of the paper stack aligned. Obtainable. In other words, when clamping a stack of paper sheets before gluing, the workability of the clamp is good, a stable clamping force can be secured, and the clamping is completed with minimal misalignment of the paper stack, resulting in good-looking bookbinding. can be done efficiently.

[Example] FIG. 1 is a perspective view showing an example of a clamper in the present invention,
FIG. 2 is a sectional view showing the clamper, FIG. 3 is a side view showing an example of the glue applicator of the present invention, and FIG. 4 is a block diagram showing an example of the clamper control system of the present invention.

The bookbinding glue applicator 10 moves the paper bundle 11 and applies glue to the back surface of the paper bundle 11 during the movement.
1 are bound together into a booklet with glue.

As shown in FIG. 3, the glue applicator M10 includes a clamper 12, a glue tank 13, a glue drum 14, and a doctor roller 1.
5, clamper moving motor 16, and drum rotation motor 1
7.

The clamper 12 clamps the paper bundle 11.

At this time, the paper bundle 11 is aligned with its back surface on the receiving plate 21 located on the entry side of the glue tank 13, and
After the front end face and rear end face are adjusted, they are clamped. The receiving plate 21 can move up and down, and after the paper bundle 11 is clamped by the clamper 12, it waits below until the paper stack 11 after completion of gluing is transferred from the clamper 12.

The glue tank 13 stores glue, which is, for example, a hot melt adhesive, and is installed on the top of the base 22 .

The glue drum 14 is rotatably supported by the glue tank 13 and has its lower half immersed in the glue inside the glue tank 13 so as to transfer the glue to the back surface of the paper bundle 11 clamped by the clamper 12. adhere to.

The doctor roller 15 is rotatably supported by the glue tank 13, is located inside the glue tank 13, and is connected to the glue drum 14.
The thickness of the glue adhered to the back surface of the paper bundle 11 is adjusted by adjusting the thickness.

The clamper moving motor 16 causes the clamper 12 to pass over the pasting drum 14 in both directions. At this time, the clamper 12 operates on wheels 3 provided at both ends of each of the two guide rods 32 constituting the movable base 31, as will be described later.
3 is movably supported along a guide rail 34, and is further connected to both ends of the movable base 31 to form a substantially circular chain 35, which is wound around sprockets 36 disposed on both sides of the movement range of the clamper 12. By rotating the sprocket 36 in the forward and backward directions by the clamper moving motor 16, it reciprocates as described above (see Figures 1 and 2).The original position and return position of the reciprocating movement of the clamper 12 teeth,
For example, it is controlled based on the output of a limit switch provided corresponding to both positions, or a rotary encoder provided on the clamper moving motor 16.

The drum rotation motor 17 rotates the gluing drum 14 and the doctor roller 15 via the winding member 24 .

As described above, the glue applicator 10 has the clamper moving motor 1
6, when the clamper 12 is passed along the glue drum 14, the clamper 12 removes the glue on the surface of the glue drum 14.
It is applied to the back side of the paper bundle 11 which is clamped.

However, as shown in FIGS. 1 and 2, the clamper 12 of the glue applicator 10 has a pair of clamp plates 37A and 37B for clamping the paper bundle 11, and one of the clamp plates 3
7A is fixed to the guide rod 32 of the movable base 31, and the other clamp plate 37B can be slid along the guide rod 32 of the movable base 31. The movable base 31 of the clamper 12 is constructed by connecting one end of each of the two guide rods 32 with a fixed clamp plate 37A, and connecting the other end of each of the guide rods 32 with a connecting beam 38. has been done.

Further, the clamper 12 supports a clamp plate drive motor 39 on a connecting beam 38 that constitutes the movable table 31, and
A nut 41 is rotatably supported on a bearing 40 provided on the connecting beam 38, and the output shaft 3 of the clamp plate drive motor 39
Hollow support shaft 41A of pulley 42 and nut 41 provided at 9A
A belt 44 is wound around a pulley 43 provided at.

Further, in the clamper 12, a feed screw 45 fixedly provided on the movable clamp plate 37B is screwed into the nut 41. As a result, the clamper 12 rotates the nut 41 in the forward and reverse directions by forward and reverse rotation of the clamp plate drive motor 39, and moves the feed screw 45 that is screwed into the nut 41 in its axial direction.
The movable clamp plate 37B, which is integrated with the feed screw 45, is reciprocated along the guide rod 32, so that the clamp plates 37A and 37B can be expanded and contracted at a certain distance.

Furthermore, the clamper 12 has a clamp plate drive control device 46 as in the first embodiment shown in FIG. 4(A). The control device 46 is composed of, for example, a microcomputer,
The above-mentioned clamp plate drive motor 39 is controlled as follows.

That is, the control device 46 controls the clamp plate drive motor 39 via the motor drive circuit 47.

At this time, the control device 46 additionally includes an operation switch 48 and an overload current detector 49 for the motor 39. That is, the control device 46 (1) controls the clamp plate drive motor 39 to continuously drive the movable clamp plate 37B while the ON operation applied to the operation switch 48 continues; When it is determined from the detection result of the overload current detector 49 that a certain reaction force has acted on the movable clamp plate 37B, the operation switch 4 is
The clamp plate drive motor 39 is controlled to stop driving the movable clamp plate 37B, giving priority to the control operation (2) based on the ON operation of 8.

Next, the operation of the first embodiment will be explained.

According to the first embodiment, when clamping the paper stack 11, the distance between the clamp plates 37A and 37B is a constant margin α (for example, 1 to 3 mm) to the thickness t of the paper stack 11 to be clamped this time. Continue to press the operation switch 48 until the intermediate stop interval t+α is reached. Then, under this intermediate stop interval state, the deviation occurring in the sheet bundle 11 is corrected manually by the operator or by the action of an automatic alignment device attached to the clamper 12. Thereafter, the operation switch 48 is turned on again to obtain a final clamping state in which a constant reaction force is applied to the clamp plate 37B, thereby ensuring a stable clamping force on the paper bundle 11.

Incidentally, as a second embodiment of the present invention, the clamp plate drive control device 46 shown in FIG. That is, ■ a certain period of time after the ON operation applied to the operation switch 48 (clamp plate 3
7B), the clamp plate drive motor 39 is controlled to continuously drive the clamp plate 37B, and a constant reaction force is applied to the clamp plate 37B while it is being driven. When it is determined from the detection result of the overload current detector 49 that the overload current detector 49 has acted, the clamp plate is configured to stop driving the clamp plate 37B in priority to the control operation (①) based on the ON operation of the operation switch 48. It controls the drive motor 39.

According to the second embodiment, when clamping the paper stack 11, the distance between the clamp plates 37A and 37B is a constant distance α (for example, 1 to 3 mm) based on the thickness t of the paper stack 11 to be clamped this time. The operating switch 48 is operated in increments until the intermediate stop interval t+α is reached. Then, under this intermediate stop interval state, the deviation occurring in the sheet bundle 11 is corrected manually by the operator or by the action of an automatic alignment device attached to the clamper 12. after that,
After turning on the operation switch 48 again, the clamp plate 37B
A final clamping state is obtained in which a constant reaction force is applied to the paper bundle 11, and a stable clamping force is secured for the paper bundle 11.

Further, as a third embodiment of the present invention, the clamper 12 has a fourth embodiment.
A clamp plate drive control device 51 as shown in Figure (B) can also be used. The control device 51 is composed of, for example, a microcomputer, and controls the clamp plate drive motor 39 via a motor drive circuit 52. At this time, the motor drive circuit 52 connects the thickness setting device 53 and the operation switch 5.
4 and an overload current detector 55 for the motor 39. That is, the control device 51 controls the thickness setter 53 of the signal corresponding to the thickness of the paper bundle 11 to be clamped this time.
Regarding the interval between the clamp plates 37A and 37B based on the input signal corresponding to the thickness of the paper bundle 11, which is input at the intermediate stop interval, which is the thickness of the paper bundle 11 plus a certain extra distance α. controls the clamp plate drive motor 39 so as to continuously drive the clamp plate 37B, and when re-driving the clamp plate 37B from the intermediate stop interval state to the interval reduction side using the operation switch 54, the drive The clamp plate drive motor 39 is controlled to stop driving the clamp plate 37B on the condition that a certain reaction force acts on the inner clamp plate 37B or it is determined based on the detection result of the overload current detector 55. .

Incidentally, as a fourth embodiment of the present invention, the clamper 12 has a fourth embodiment.
In place of the thickness setting device 53 shown in Fig. 4(C),
A plurality of thickness input button switches 61A, 6 as shown in FIG.
1B...61N may also be provided. In this case, the control device 51 controls the sheet bundle 1 to be clamped this time in the control operation (3) in the third embodiment.
The operation of inputting a signal corresponding to the thickness of 1 is performed using the thickness input button switches 61A, 61B, . . . , 6 corresponding to the thickness.
This is performed by a 1N ON operation, and the other control operations are the same as those in (1) and (2) in the third embodiment.

According to the third embodiment and the fourth embodiment, when clamping the paper stack 11, the paper stack 11 to be clamped this time
A signal corresponding to the thickness t is input using the thickness setting device 53 or the thickness input button switches 61A, 61B, . . . , 61N. As a result, the interval between the clamp plates 37A and 37B is set to the intermediate stop interval t10, which is the thickness t of the paper bundle 11 to be clamped this time and a certain extra interval α (for example, 1 to 3++++++). Then, under this intermediate stop interval state, the deviation occurring in the sheet bundle 11 is corrected manually by the operator or by the action of an automatic alignment device attached to the clamper 12. Thereafter, the clamp plate 37B is driven again using the operation switch 54, and a final clamping state is reached in which a constant reaction force is applied to the clamp plate 37B, thereby ensuring a stable clamping force for the paper bundle 11.

In any of the embodiments described above, in the final clamping state, the displacement of the paper bundle 11 can be minimized because the distance of movement of the clamp plate from the intermediate stop interval state is short. As a result, the paper bundle 11 is glued in a stable clamped state that does not shift from the pre-gluing stage and also does not shift during the gluing stage, resulting in a good-looking book with the back side of the paper bundle aligned. You can get the status. That is, when clamping the paper stack 11 at the pre-gluing stage, the clamping workability is good, a stable clamping force is secured, and the clamping is completed with minimal displacement of the paper stack 11, and the appearance is improved. Good bookbinding can be performed efficiently.

In the implementation of the present invention, the detection of a certain reaction force acting on the clamp plate during the final clamping stage of the clamp plate during driving is not limited to the use of an overload current detector of the motor. Alternatively, a spring member may be provided on the back surface of the movable clamp plate, and a limit switch may be used to detect the state in which the spring member is compressed and deformed by the reaction force acting on the movable clamp plate.

Further, in the implementation of the present invention, the clamper drives at least one of a pair of clamp plates, and may move both clamp plates toward each other.

[Effects of the Invention] As described above, according to the present invention, when clamping a stack of paper sheets before gluing, the workability of the clamp is good, a stable clamping force can be secured, and the shift occurring in the paper stack can be minimized. Clamping is completed in a limited state, and good-looking bookbinding can be performed efficiently.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of a clamper according to the present invention;
FIG. 2 is a sectional view showing a clamper, FIG. 3 is a side view showing an example of the glue applicator of the invention, and FIG. 4 is a block diagram showing an example of the clamper control system of the invention. DESCRIPTION OF SYMBOLS 10... Glue applicator for bookbinding, 11... Paper bundle, 12... Clamper, 13... Glue tank, 14... Glue drum, 16... Clamper moving motor (clamper moving device) , 37A, 37B... Clamp plate, 39... Clamp plate drive motor (clamp plate drive unit), 46... Clamp plate drive control device (clamp plate drive control unit), 48... Operation switch, 49 ... Overload current detector, 51... Clamp plate drive control device (clamp plate drive control unit), 53... Thickness setting device, 55... Overload current detector, 61A, 61B... 61N...Thickness input button switch. Agent Patent Attorney Osamu Shiokawa

Claims (3)

[Claims] (1) It has a clamper that clamps a paper bundle, a glue drum that is immersed in a glue tank, and a clamper moving device that allows the clamper to pass along the glue drum, and the clamper moving device moves the clamper to the glue drum. When passing along the
In a bookbinding glue applicator that applies glue on a glue-applying drum to the back of a stack of paper clamped by a clamper, the clamper includes a pair of clamp plates that clamp the stack of paper;
A clamp plate drive unit that drives at least one of the clamp plates to increase or reduce the interval between the two clamp plates, and an operation switch, and the clamp plate continues to operate while the ON operation applied to the operation switch continues. The clamp plate drive section is controlled to drive the clamp plate, and when a certain reaction force acts on the clamp plate being driven, the clamp plate is stopped driving in priority to the above control operation based on the ON operation of the operation switch. 1. A bookbinding glue applicator comprising: a clamp plate drive control section for controlling a clamp plate drive section; (2) It has a clamper that clamps the paper bundle, a glue drum that is immersed in a glue tank, and a clamper moving device that allows the clamper to pass along the glue drum, and the clamper moving device moves the clamper to the glue drum. When passing along the
In a bookbinding glue applicator that applies glue on a glue-applying drum to the back of a stack of paper clamped by a clamper, the clamper includes a pair of clamp plates that clamp the stack of paper;
A clamp plate drive unit that drives at least one of both clamp plates to increase or reduce the interval between both clamp plates, and an operation switch, and the clamp plate continues to operate for a certain period of time after an on operation applied to the operation switch. The clamp plate drive section is controlled to drive the clamp plate, and when a certain reaction force acts on the clamp plate being driven, the clamp plate is stopped driving in priority to the above control operation based on the ON operation of the operation switch. 1. A bookbinding glue applicator comprising: a clamp plate drive control section for controlling a clamp plate drive section; (3) It has a clamper that clamps the paper bundle, a glue drum that is immersed in a glue tank, and a clamper moving device that allows the clamper to pass along the glue drum, and the clamper moving device moves the clamper to the glue drum. When passing along the
In a bookbinding glue applicator that applies glue on a glue-applying drum to the back of a stack of paper clamped by a clamper, the clamper includes a pair of clamp plates that clamp the stack of paper;
It is equipped with a clamp plate drive unit that drives at least one of both clamp plates to increase or reduce the interval between both clamp plates, and an operation unit that can input a signal corresponding to the thickness of the stack of paper to be clamped this time. Based on the input signal corresponding to the thickness of the paper bundle, the clamp plate is continuously driven until the distance between the two clamp plates reaches an intermediate stop interval which is the thickness of the paper bundle plus a certain extra distance. The clamp plate drive section is controlled to drive the clamp plate further from the intermediate stop interval state to the interval reduction side, and when the clamp plate is re-driven, the clamp plate is moved on the condition that a certain reaction force acts on the clamp plate that is being driven. 1. A bookbinding glue applicator comprising: a clamp plate drive control section that controls the clamp plate drive section so as to stop driving the clamp plate drive section.