JP4311787B2 - Bookbinding machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bookbinding machine that adjusts the amount of glue applied to the back surface according to the thickness of a sheet bundle.
[0002]
[Prior art]
In the bookbinding process, wired binding for performing a binding process by a stitcher on a bundle of sheets (booklet) formed by stacking one printed sheet and wireless binding for performing a gluing process on the bundle of sheets. It has been known. FIG. 4 is an abbreviated configuration diagram showing an arrangement example of a bookbinding processing system that performs the perfect binding including the printing machine A, the paper stacking unit B, and the bookbinding machine C. The paper printed by the printing machine A is transported in the direction of arrows U1 and U2 and is carried into the paper stacking unit B to be in a bookbinding standby state. The bookbinding machine C includes a bookbinding processing start unit C1, a milling processing unit C2, a gluing processing unit C3, and a cover attaching processing unit C4.
[0003]
Next, the operation of the bookbinding machine C will be described. A sheet bundle made up of one sheet of paper stacked horizontally in the paper stacking unit B is changed by 90 degrees in the direction of the arrow U3 and is carried into the bookbinding processing start unit C1. In the bookbinding processing start section C1, the back side of the sheet bundle a is arranged on the level plate b, the amount of movement in the width direction between clampers (not shown) is adjusted according to the thickness of the sheet bundle a, and the sheet bundle a is clamped by the clamper. It sends to the milling process part C2 of the next process in the arrow U4 direction.
[0004]
The milling processing unit C2 is provided with a milling machine c and a width adjusting plate (not shown). When the sheet bundle a passes over the milling machine c, the back side of the sheet bundle a is flush with the glue on the back side. Pre-processing is performed so that it is evenly applied. Moreover, it processes so that a fine groove | channel may be made | formed by processing a thin groove | channel on a back surface. Next, the sheet bundle a with the back surface aligned is sent to the gluing processing unit C3.
[0005]
In the gluing processing unit C3, the gluing is stored in the gluing tank d, and gluing processing is performed on the back surface of the sheet bundle a by the gluing roller ex, and unnecessary gluing is scraped off by the scroll roller ey. When the gluing process is completed, the sheet bundle a is sent to the cover sheet processing unit C4. In the cover attachment processing unit C4, the printed cover f is conveyed from the cover accumulation unit to the nip plate (clamp plate) g and the bottom plate h in a direction indicated by the arrow U5 by an appropriate conveying means such as a conveyor, and is subjected to a gluing process. Then, the back surface of the sheet bundle a and the cover sheet f which have been transferred are pasted and the cover sheet is attached.
[0006]
FIG. 5 is an enlarged side view showing the gluing processing unit C3 of FIG. The hot melt paste Nd is accommodated in the paste tank d, and the glue roller ex is rotated in the Qx direction. At this time, the hot-melt paste Nd rises so as to be wound up by the rotating surface of the gluing roller ex, and sequentially reaches the back surface of the sheet bundle a being transferred in the direction of the arrow U4 from the front end in the transfer direction. Apply paste Nb.
[0007]
The scroll roller ey installed adjacent to the front of the gluing roller ex with respect to the transport direction of the sheet bundle is rotated in the direction of the arrow Qy in the same direction as the gluing roller ex. When the sheet bundle a is transferred to the position of the scroll roller, the excess glue Nc is removed from the glue Nb applied to the back surface of the sheet bundle a, and the glue Nd remains on the back surface of the sheet bundle a. And transferred to the next process.
[0008]
FIG. 6 is an explanatory diagram showing a state in which the sheet bundle is opened after the bookbinding process. When an appropriate amount of glue ND1 is applied to the back surface of the sheet bundle a, each sheet does not come off even if the sheet bundle a is opened as in (1). (2) in FIG. 6 is an example in the case where the amount of glue ND2 applied to the back surface of the thick sheet bundle a is insufficient. When the sheet bundle a is opened, the sheet ax near the center is detached. This indicates that the binding process is defective.
[0009]
Also, if the amount of glue applied to the back surface of the thin sheet bundle a is too large, the corners on the back surface are rounded, resulting in poor finish. Thus, in order to prevent the occurrence of defective bookbinding due to the amount of glue being excessive or too small, it is necessary to appropriately manage the amount of glue applied to the back surface in accordance with the thickness of the sheet bundle a. There is.
[0010]
[Problems to be solved by the invention]
However, conventionally, the amount of glue applied to the back of the sheet bundle has been set by an experienced operator according to the thickness of the sheet bundle. For this reason, there is a problem that the workability of the gluing process is poor and the work is restricted.
[0011]
SUMMARY OF THE INVENTION In view of such problems, an object of the present invention is to provide a bookbinding machine with improved workability by automatically setting the amount of glue applied to the back surface to an appropriate value according to the thickness of a sheet bundle.
[0012]
[Means for Solving the Problems]
The purpose is to apply a bookbinding machine to a gluing roller that applies glue to the back of a sheet bundle formed by stacking one sheet of printed paper, and a gluing roller in the transport direction of the sheet bundle. A scroll roller disposed adjacently and scraping a predetermined amount of glue applied to the back surface of the sheet bundle by the glue roller; a determination means for determining the thickness of the sheet bundle; And a control device connected to the determination means and the height change means, and according to the thickness of the sheet bundle determined by the determination means. This can be achieved by changing the height of the rotating surface from the reference position of the prober and adjusting the amount of glue applied to the back surface of the sheet bundle.
[0013]
In the present invention, since the height of the rotating surface of the scroll roller is changed using the judging means for determining the thickness of the sheet bundle, it is applied to the back surface of the sheet bundle according to the thickness of the sheet bundle. The amount of glue to be automatically adjusted can be adjusted to an appropriate value.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
[0015]
Hereinafter, a bookbinding machine according to an embodiment of the present invention will be described. FIG. 1 is a schematic perspective view showing a part of the pasting process part in a partially broken view, and FIG. 2 is a side view as seen from the direction of arrow X in FIG. 1 and 2, reference numeral 1 denotes a glue tank, and 2 denotes an outer frame that is disposed outside the glue tank 1 and has an upper opening. The outer frame 2 is provided as a heat insulating member for blocking heat dissipation from the glue tank 1 because hot melt-like glue is accommodated in the glue tank 1 and the ambient temperature rises.
[0016]
3 is a gluing roller, 4 is a gluing roller bearing that supports the rotating shaft of the gluing roller 3 on the outer frame 2, and 5 is adjacent to the gluing roller 3 with respect to the sheet bundle transfer direction. The arranged scroll rollers 6a and 6b are rotating shafts, and 7 is a bearing for the scroll rollers that supports the rotating shaft 6a of the scroll roller 5 on the glue tank 1 and the outer frame 2. Although not shown, the rotating shaft 6b is also supported by a bearing for a scroll roller supported by the glue tank 1 and the outer frame 2. The gluing roller 3 and the scroll roller 5 are driven at a predetermined rotational speed by a driving motor (not shown).
[0017]
Reference numeral 8 denotes a base plate, and supports 20a and 20b are fixed to the left and right sides when viewed from the direction of the arrow X. One end of fulcrum 9a, 9b is accommodated in support part 20a, 20b, and the other end of fulcrum 9a, 9b is fixed to connection part 21a, 21b attached to the outer frame 2. As shown in FIG. Reference numeral 10 denotes a height adjustment motor whose operation will be described later, 11 denotes an L-shaped lever whose flat portion is fixed to the bottom surface of the outer frame 2, and 12 denotes a height adjustment motor 10. A first gear connected to the output shaft.
[0018]
Reference numeral 13 denotes a second gear that meshes with the first gear 12 and to which the driving force of the height adjusting motor 10 is transmitted. Reference numeral 14 denotes a rotary plate provided to detect the rotational position of the second gear 13. Are provided with a predetermined number of openings 14a, 14b. A sensor (not shown) is provided adjacent to the rotary plate 14 to detect the rotational position of the second gear 13, that is, the rotational angle of the output shaft of the height adjustment motor 5.
[0019]
Reference numeral 15 denotes a gear bearing, 16 denotes a transmission shaft that is connected to the second gear 13 and transmits power, and 17 denotes an eccentric shaft that is connected to the distal end surface of the transmission shaft 16. The eccentric shaft 17 is connected to the shaft center of the transmission shaft 16 while shifting the position of the shaft center. Reference numeral 18 denotes a vertically moving block fixed to the eccentric shaft 17, and 19 denotes a pin. The pin 19 is inserted through the vertical portion of the lever 11 bent in an L shape, and fixes the lever 11 to the vertical movement block 18. The vertical movement block 18 is provided with a crank mechanism and moves up and down according to the rotation of the eccentric shaft 17.
[0020]
When the height adjusting motor 10 is driven to rotate the rotating shaft slightly, the first gear 12 fixed to the rotating shaft rotates, and the second gear 13 engaged with the first gear 12 moves to the first. It rotates in the opposite direction to the first gear 12. The transmission shaft 16 is rotated by the rotation of the second gear 13, the power is transmitted to the eccentric shaft 17 connected to the transmission shaft 16, and the eccentric shaft 17 is slightly rotated. As the eccentric shaft 17 rotates, the vertical movement block 18 moves up or down.
[0021]
When the vertical movement block 18 is raised or lowered, the lever 11 connected to the vertical movement block 18 via the pin 19 is also raised or lowered. The flat surface of the lever 11 is fixed to the bottom surface of the outer frame 2, and the outer frame 2 is slightly rotated around the fulcrums 9a and 9b supported by the support portions 20a and 20b. Since the outer frame 2 and the glue tank 1 are provided with a scroll roller bearing therethrough, when the outer frame 2 is rotated by the rotation of the eccentric shaft 17 as described above, the screen The driving force is transmitted to the glue tank 1 through the bearing for the rubber, and the glue tank 1 also rotates in conjunction with it.
[0022]
That is, the height of the glue tank 1 from the horizontal level changes. For this reason, since the height of the rotating surface of the scroll roller 5 changes from the reference position, the distance between the rotating surface of the scroll roller 5 and the back surface of the sheet bundle to be transferred changes, and the The amount of glue scraped off by the roller 5 is adjusted.
[0023]
As described above, the height from the reference position of the scroll roller 5 provided in the glue tank 1 changes according to the rotational position of the eccentric shaft 17. An eccentric shaft 17 is connected to the end circumferential surface of the transmission shaft 16 connected to the second gear 13 by shifting the position of the shaft center from the axis of the transmission shaft 16. For this reason, if the position of the eccentric shaft 17 is initially set to the reference position of the scroll roller 5, the rotation surface of the scroll roller 5 is the highest from the reference position due to the half rotation of the transmission shaft 16. The height changes to the height. Further, the rotation surface of the scroll roller 5 changes in height from the maximum height to the reference position in the next half rotation of the transmission shaft 16.
[0024]
In the present invention, the height adjustment of the scroll roller 5 is automatically set according to the thickness of a bundle of sheets to be bound (booklet). In order to perform such processing, a control device that outputs a control signal to the height adjustment motor 10 is provided. The control device receives the rotation amount of the second gear detected by a sensor arranged adjacent to the rotating plate 14, that is, the rotation angle of the rotation shaft of the height adjusting motor 10.
[0025]
The control device outputs a control signal to the height adjustment motor 10 based on the detection signal input from the sensor, and drives the height adjustment motor 10. The rotation angle of the rotating shaft of the height adjusting motor 10, that is, the height from the reference position of the rotating surface of the scroll roller 5, reaches a predetermined position set according to the thickness of the sheet bundle. Then, the control device outputs a control signal for stopping the height adjusting motor 10.
[0026]
FIG. 3 is a flowchart showing a processing procedure for automatically setting the height of the scroll roller 2 from the reference position in accordance with the thickness of the sheet bundle (booklet) as described above. Next, this flow chart will be described.
[0027]
(1) The bookbinding processing program is started in step S1, and the number of sheets forming one sheet bundle is fetched in step S2. Next, in step S3, the thickness of the booklet is obtained by calculating (number of sheets × thickness of one paper = booklet thickness).
[0028]
(2) Subsequently, in the process of step S4, it is determined whether the thickness of the booklet obtained by the process of step S3 is less than 5 mm. If this determination result is Yes, the height from the reference position of the rotating surface of the scroll roller 5 is set to “high” in the processing of step S5, and the processing program is ended in step S9.
[0029]
(3) In the processing of step S5, the height from the reference position of the rotating surface of the scroll roller 5 is set to “high”, so that the space between the back of the booklet and the rotating surface of the scroll roller 5 is , The glue applied to the back of the booklet is stripped off, and a small amount of glue is applied to the back of the booklet and transferred to the next process.
[0030]
(4) If the determination result in step S4 is No, the booklet has a thickness of 5 mm or more. Therefore, in step S6, it is determined whether the booklet is thinner than 15 mm.
[0031]
(5) If the determination result in step S6 is Yes, the thickness of the booklet will be thicker than 5 mm and thinner than 15 mm. Next, in the process of step S7, the rotational surface of the scroll roller 5 is checked. The height from the reference position is set to “medium”, and the processing program ends in step S9.
[0032]
(6) In the process of step S7, the height from the reference position of the rotating surface of the scroll roller 5 is set to “medium”, so that the space between the back of the booklet and the rotating surface of the scroll roller 5 is Thus, the intermediate amount of glue applied to the back of the booklet is scraped off, and an intermediate amount of glue is applied to the back of the booklet and transferred to the next process.
[0033]
(7) If the determination result in step S6 is No, the thickness of the booklet is 15 mm or more. Next, in step S8, the height from the reference position of the scroll roller 2 is set to “low”. In step S9, the processing program is terminated.
[0034]
(8) In step S8, since the height of the scroll roller 2 from the reference position is “low”, the distance between the back of the booklet and the rotation surface of the scroll roller 2 is A large amount of glue applied to the back of the booklet is scraped off, and a large amount of glue is applied to the back of the booklet and transferred to the next process.
[0035]
As described above, in the present invention, when the sheet bundle is thin, the amount of glue applied to the back surface is set to the minimum amount that can provide strength so that wasteful glue does not adhere. Further, when the thickness of the sheet bundle is large, the amount of glue applied to the back surface is increased so that the required strength can be obtained. For this reason, it is possible to perform bookbinding with sufficient strength and a beautiful finished appearance.
[0036]
【The invention's effect】
As described above, in the bookbinding machine of the present invention, the height of the rotation surface of the scroll roller is changed using the determination means for determining the thickness of the sheet bundle. Accordingly, the amount of glue applied to the back surface of the sheet bundle can be automatically adjusted to an appropriate value.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a bookbinding machine according to an embodiment of the present invention.
FIG. 2 is a side view as seen from the direction of arrow X in FIG.
FIG. 3 is a flowchart showing a processing procedure for adjusting the height of the rotating surface of the scroll roller.
FIG. 4 is a configuration diagram illustrating an example of a bookbinding processing system.
FIG. 5 is a schematic side view of a gluing processing unit.
FIG. 6 is an explanatory diagram showing a state in which a sheet bundle having glue applied on the back is opened.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Glue tank 2 Outer frame 3 Glue roller 4 Glue roller bearing 5 Scroll roller 6 Rotating shaft 7 Scroll roller bearing 8 Base plate 9 Supporting point 10 Height adjustment motor 11 Lever
12 First gear 13 Second gear 14 Rotating plate 15 Gear bearing 16 Transmission shaft 17 Eccentric shaft 18 Vertical motion block 19 Pin

Claims (1)

A gluing roller that applies glue to the back of a sheet bundle formed by stacking one sheet of printed paper, and a gluing roller that is disposed adjacent to the gluing roller in the transport direction of the paper bundle. Adjusting the height of the scroll roller that removes a predetermined amount of glue applied to the back of the paper bundle by the roller, the judging means for judging the thickness of the paper bundle, and the rotating surface of the scroll roller And a control device connected to the determination means and the height adjustment means, and from the reference position of the scroll roller according to the thickness of the sheet bundle determined by the determination means. The bookbinding machine is characterized by changing the height of the rotation surface of the paper and adjusting the amount of glue applied to the back of the paper bundle

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