JPH10181236A - Bookbinding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bookbinding device, in which the pinching with a a sheet bundle pinching means and pinching releasing action are accelerated and, at the same time, an optimum tape suitable for the thickness of a sheet bundle can be selected. SOLUTION: The thickness of a sheet bundle pinched between a movable pinching means 17a and a fixed pinching means 16a of a sheet bundle pinching means is detected by a pinched sheet bundle thickness detecting means 210. By controlling a driving means for moving the moving pinching means 17a by the distance in response to the thickness of the pinched sheet bundle towards the pinching direction and for releasing the pinching of the pinched sheet bundle on the basis of detection signals sent from the pinched sheet bundle thickness detecting means by means of a controlling means, the pinching of the sheet bundle pinching means and a pinching releasing are accelerated. Further, by controlling a tape supplying means having several kinds of binding tapes different in breadth from one another in response to the thickness of the pinched sheet bundle, a supplying tape controlling means selectively supplies the binding tape having the optimum breadth to a tape heating device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bookbinding apparatus provided with a sheet bundle holding and conveying device, and more particularly to control of a sheet bundle holding means of the sheet bundle holding and conveying device.

[0002]

2. Description of the Related Art Some conventional bookbinding apparatuses include a sheet bundle clamping device for clamping and conveying a sheet bundle aligned by a sheet bundle storage / alignment device to a tape heating device for heating and bonding a bind tape. Here, the sheet bundle holding device has a sheet bundle holding device including a movable side holding device and a fixed side holding device, while the fixed side holding device uses the sheet bundle holding / aligning device as a reference for the sheet stacking surface in the sheet bundle storage / alignment device. After a predetermined number of sheet bundles are stored in the storage tray, the movable side holding means is moved to pinch the sheet bundle and transport it to the tape heating device.

In the meantime, the movable side holding means needs to be opened and moved by a sufficient amount in the standby state before holding the sheet bundle to hold the sheet bundle having the maximum thickness. It is waiting in a state where tmax + α (the allowance) is open. When the sheet bundle is held, the holding amount is set to tmax + α so that the sheet bundle of any thickness can be held.

On the other hand, a bookbinding apparatus has at least two types of tapes in order to selectively use a tape having a width corresponding to the thickness of a sheet bundle. In the case of a sheet bundle of less than 100 sheets, a tape having a small width is selected and sent from the tape supply device to the tape heating device.

[0005]

However, in the conventional bookbinding apparatus having such a configuration, even when a thin sheet bundle is bound, the movable side holding means performs the operation of holding and releasing the amount of the maximum bundle thickness tmax + α. , The extra time is required for the clamping and the releasing operation, and the time required for bookbinding is increased.

Although the width of the tape is selected according to the number of sheets in the sheet bundle, the thickness of the bundle varies depending on the paper type and basis weight, so that a tape having an optimum tape width cannot be selected, and appropriate heat bonding is performed. There was a problem that it was not possible.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem. The present invention has been made to speed up the operation of holding and releasing the sheet bundle holding means and to provide an optimum tape according to the thickness of the sheet bundle. It is an object of the present invention to provide a bookbinding device capable of selecting a bookbinding.

[0008]

SUMMARY OF THE INVENTION The present invention conveys a sheet bundle from a standby position to a tape heating device which moves the sheet bundle while nipping the sheet bundle and heat-bonds the bind tape to the sheet bundle. A sheet bundle nipping and conveying device having a sheet bundle nipping means having a sheet bundle nipping means for returning to the standby position in the nipping released state after being conveyed to the delivery position, wherein the movable side nipping means constituting the sheet bundle nipping means Fixed-side clamping means, driving means for moving the movable-side clamping means in the sheet bundle clamping direction and sheet clamping releasing direction, and a sandwich sheet bundle thickness for detecting a sheet bundle thickness of the sheet bundle clamped by the sheet bundle clamping means. Detecting means, and the movable side nipping by a distance corresponding to the thickness of the nipped sheet bundle based on a detection signal from the nipping sheet bundle thickness detecting means. And control means for controlling said drive means to move the stage in the clamping direction and the clamping release direction, is characterized in that it comprises a.

The present invention is characterized in that the sandwiched sheet bundle thickness detecting means detects the sandwiched sheet bundle thickness based on the amount of movement of the movable side clamping means when the sheet bundle is clamped. Things.

Further, in the present invention, the holding sheet bundle thickness detecting means detects a moving amount of the movable side holding means by a moving amount of a driving portion of the driving means for moving the movable side holding means. It is assumed that.

In the present invention, the control means may be arranged such that, when the holding at the transfer position is released, the movable holding means is separated from the fixed holding means by a predetermined distance from the detected holding sheet bundle thickness. The driving means is controlled to move.

Further, in the present invention, the control means may be configured such that before the first sheet bundle is nipped, the movable side nipping means is moved from the fixed side nipping means to a predetermined sheet bundle thickness of a sheet bundle to be bound. It is characterized by being moved to a position separated by a distance.

Further, according to the present invention, when the control means holds the next sheet bundle after delivering the sheet bundle, the control means includes the movable-side holding means based on the holding sheet bundle thickness detected by the holding sheet bundle thickness detecting means. Is moved in the clamping direction longer than the detected sheet bundle thickness by the predetermined distance.

The present invention is also directed to a tape supply means having several kinds of the bind tapes having different widths to be supplied to the tape heating means, and the nipped sheet bundle based on a detection signal from the nipped sheet bundle thickness detecting means. And a supply tape control means for controlling the tape supply means so as to selectively supply a bind tape having an optimum width to the tape heating device according to the thickness of the tape heating apparatus.

Further, as in the present invention, the sheet bundle thickness of the sheet bundle clamped by the movable side clamping means and the fixed side clamping means of the sheet bundle clamping means is detected by the clamping sheet bundle thickness detecting means, while the control means is controlled by the control means. On the basis of the detection signal from the sandwiched sheet bundle thickness detecting means, by controlling the driving means to move the movable side clamping means in the clamping direction and the clamping release by a distance corresponding to the thickness of the clamped sheet bundle, the sheet An operation for holding and releasing the bundle holding means is made faster.

Further, as in the present invention, by controlling the tape supply means having several kinds of bind tapes having different widths according to the thickness of the sandwiched sheet bundle by the supply tape control means, the optimum width can be obtained. Is selectively supplied to the tape heating device.

[0017]

Embodiments of the present invention will be described below.

FIG. 1 is a diagram showing a structure of a bookbinding apparatus according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a bookbinding apparatus. The bookbinding apparatus 1 includes a sheet conveying device 201, a sheet storage / alignment device 202, and a sheet bundle holding / conveying device 20.
3, a tape heating device 204, a tape transport device 205, a bookbinding transport device 206, and a storage stacker 207.

Here, the sheet conveying apparatus 201 has a conveying path 2 for the sheet material S to be conveyed. The conveying path 2 is formed with a carry-in port 2a and a discharge port 2b. A carry-in roller pair 3, a plurality of carry-roller pairs 4, and a carry-out roller pair 5 are provided from the upstream side along the carry path 2.

In the meantime, a flapper 6 as a branching means is provided near the downstream of the carry-in roller pair 3.
At the time of bookbinding, the sheet is conveyed to the sheet conveying path 7 by switching the flapper 6. The sheet conveyed to the sheet conveying path 7 by the flapper 6 is stored and stored by a sheet conveying roller pair 8.
It is carried into the matching device 202.

On the other hand, as shown in FIG. 2, the sheet storage / alignment device 202 includes a storage tray 9 for storing sheets, a fixed fence 10a and a movable fence 10b for aligning sides parallel to the sheet conveyance direction, and a front end in the sheet conveyance direction. Alignment paddle 11 for aligning the sides of the sheet, stop fingers 12a and 12b for temporarily suspending the sheet between booklets, leading edge reference shutters 13a and 13b against which the leading edge of the sheet abuts, and a lower entrance guide 14 for guiding the lower surface of the sheet at the apparatus entrance. , Upper guide 15 for guiding the upper surface of the sheet at the apparatus entrance
a, 15b and 15c.

The sheet carried into the sheet storage / alignment device 202 by switching the flapper 6 has its upper surface guided by the upper entrance guides 15a, 15b, and 15c, and its lower surface guided by the lower entrance guide 14, and has a reference shutter. 13a and 13b. At this time, on the storage tray 9, alignment in the sheet transport direction is performed by the alignment paddle 11, and alignment of sides parallel to the sheet transport direction is performed by the fixed fence 10a and the movable fence 10b. The sheet is aligned with the fixed fence 10a as a reference.

When bookbinding is performed continuously, the stop fingers 12a and 12b are operated to temporarily hold sheets between the volumes, and after the aligned sheet bundle is carried out from the storage tray 9, the stop fingers 12a and 12b are stopped. 12b is released and the waiting sheet is transferred to the storage tray 9.

The sheet bundle holding / conveying device 203
As shown in FIG. 2, sheet bundle holding means including movable grip plates 17a and 17b serving as movable holding means and fixed grip plates 16a and 16b serving as fixed holding means, and driving means for the movable grip plates 17a and 17b. Nipping drive mechanism (shown later), movable grip plates 17a, 17b and fixed grip plates 16a, 1
6b moving mechanism (illustrated later), sheet bundle guide 18
a, 18b and 18c.

When the sheet alignment by the sheet aligning device 202 is completed, the movable grip plates 17a, 17
b, the gripping drive mechanism is activated to move the movable grip plate 17
a and 17b move, and hold the alignment sheet bundle S together with the fixed grip plates 16a and 16b as shown in FIG. Next, when the nipping of the sheet bundle S is completed,
The moving mechanism of the movable grip plates 17a, 17b and the fixed grip plates 16a, 16b is operated, and the sheet aligning device 202 sends the aligning sheet from the sheet aligning device 202 to the tape heating device 204 with the sheet bundle S held therebetween as shown in FIG. Convey the bundle.

At this time, the movable grip plate 17
Since the sheet bundle guides 18a, 18b and 18c also move together with the sheet bundle guides 18a, 18b and 18c along with the fixed grip plates 16a and 16b, the lower side of the rear end of the sheet bundle S is, as shown in FIG. Guide support is provided by 18a, 18b, 18c.

As shown in FIG. 1, the tape heating device 204 includes a tape guide 19, 20, a center heater 21, side heaters 22, 23, a drive mechanism 24 for the center heater 21, a drive mechanism 25 for the side heaters 22, 23, and the like. Have. Furthermore, the bind tape 26 is supplied to the tape guide units 19 and 20 by the tape transport unit 205 as a tape supply unit before the aligned sheet bundle is transported to the tape heating device 204 by the sheet bundle nipping and transporting device 203. ing.

The tape transport device 205 comprises first and second tape reels R1 and R2, a carriage transport C, a tape cutter 42, a tape transport means 43, and the like. Reel R1, R
2 accommodates tapes of two different widths according to the bundle thickness.

The first and second tape reels R
The tape wound around R1 and R2 is cut into a predetermined length by a tape cutter 42 as shown in FIG. 4 to become the bind tape 26, and is conveyed into the carriage conveyance body C by the tape conveyance means 43. Thereafter, when the bind tape 26 is transported, the carriage transport body C moves from the tape receiving position C1 to the tape transfer position C2 as shown in FIG.

Further, when the movement of the carriage conveying member C from the tape receiving position C1 to the tape transferring position C2 is completed, the bind tape 26 is supplied to the tape guides 19 and 20 by the tape conveying means 44 as shown in FIG. Is done. After the supply of the bind tape 26,
The center heater 21 is moved from the retracted position (not shown) to the heating position shown in FIG. 1 by the drive mechanism 24 to start preheating the bind tape 26.

Thereafter, as shown in FIG. 7A, when the aligned sheet bundle S is transported to the rear contact position H (see FIG. 1) by the sheet bundle transport device 203, the rear surface of the sheet bundle S is bound. It is bound by the tape 26. Further, when the rear binding of the sheet bundle S is completed, the side heaters 22 and 23 are moved by the drive mechanism 25 while retracting the tape guides 19 and 20 (not shown) and lifting the end of the bind tape 26. After that, the sheet bundle S is sandwiched between the side heaters 22 and 23 to start binding the side surfaces of the sheet bundle S.

Next, when the side binding of the sheet bundle S is completed, the pressurization by the side heaters 22 and 23 is released, and thereafter, as shown in FIG. The finished product SC is transferred from the back contact position H to a transfer position to the bookbinding transfer device 206. The center heater 21 and the side heater 2
2 and 23 return to the retracted position because the next bind tape is supplied to the tape guide section by the drive mechanism 24 of the center heater 21 and the drive mechanism 25 of the side heaters 22 and 23, respectively.

As shown in FIG. 1, the booklet bundle conveying device 206 includes a bookbinding completed product receiving tray 27, a bookbinding completed product conveying tray 28, and a driving means 2 for the bookbinding completed product receiving tray 27.
9, 30, driving means 31, for the bookbinding finished product transport tray 28,
32, elevating means 33, 34 and the like.

When the sheet bundle nipping / transporting device 203 transfers the sheet bundle from the back contact position H to the transfer position to the bookbinding transport device 206, the bookbinding completed product SC is delivered to the bookbinding completed product receiving tray 27. After that, the driving means 2
It moves to the bookbinding finished product receiving position by 9 and 30.

Next, when the movement of the bookbinding completed product receiving tray 27 to the bookbinding completed product receiving position is completed, FIG.
As shown in the figure, the holding of the movable grip plates 17a, 17b and the fixed grip plates 16a, 16b of the sheet bundle holding / conveying device 203 is released, and the bookbinding finished product SC as the bookbinding bundle is received by the bookbinding finished product receiving trays 27a, 27b. Passed. After this, the sheet bundle holding / conveying device 203
Returns to the aligned sheet nipping position of the sheet aligning device 202 in the nipping released state.

On the other hand, upon receiving the bookbinding finished product SC, the bookbinding finished product receiving tray 27 is driven by the driving means 29, 30.
It moves to the transfer position T to the bookbinding completed product transport tray 28 shown in FIG. Then, the bound booklet conveyance tray 28 is
When the finished bookbinding product SC is received at the transfer position T as shown in FIG. 8A, the drive means 31 and 32 (see FIG. 1) move it onto the storage stacker 35 as shown in FIG. 8B. , As shown in FIG. 8 (c),
4 (see FIG. 1), the bookbinding finished product SC descends in the storage stacker 35. After that, the bookbinding completed product SC is stored in the storage stacker 35 by moving the bookbinding completed product transport tray 28 in a direction away from the storage stacker 35.

Next, the detailed operation of the sheet nipping / conveying device 203 of the present invention for nipping / conveying a sheet bundle will be described.

FIG. 9 is a side sectional view of the sheet holding / conveying device 203 located at the sheet holding position of the sheet storage / alignment device 202, FIG. 10 is a side view seen from the tape heating device 204 side, and FIG. -It is a top view of the conveyance apparatus 203.

In FIGS. 9, 10 and 11, 5
0a and 50b are the movable grip plates 17a,
The sheet bundle nipping pulse motors constituting the nipping driving mechanism 17b, 51a and 51b are first mounting plates, 52a
₁ , 52a ₂ , 52b ₁ , 52b ₂ are first linear guides, 53a, 53b are second mounting plates, 54a, 54
b is a gear mounting plate, 55a and 55b are motor mounting plates, 5
6a and 56b are first relay gears, 57a and 57b are second relay gears, 58a and 58b are first drive racks, 59a and 5
9b is a second linear guide, 60a and 60b are sensor flags, 61a and 61b are sensor mounting plates, 62a and 62.
b is a height detection sensor, 63a and 63b are third relay gears, 64a and 64b are fourth relay gears, 65a and 65b are second drive racks, 66a and 66b are positioning shaft support plates,
67a and 67b are third linear guides, 68a and 68b are first positioning axes, and 69a and 69b are positioning rollers.

Numerals 71a and 71b denote clamping position detection sensor flags, 72a and 72b denote clamping position detection sensors, 73
Reference numerals a and 73b denote a mounting position detection sensor mounting plate, and 74a and 7b.
Reference numeral 4b denotes a support side plate that directly or indirectly supports the sheet storage / alignment device 202, the sheet bundle holding / conveying device 203, and the tape heating device 204, 75a and 75b slide rails, and 76a and 76b the movable grip plate 17.
a and 17b and a pulse motor for conveying a sheet bundle constituting a moving mechanism of the fixed grip plates 16a and 16b;
a and 77b are sheet bundle transport drive belts, 78a and 78b
Is a belt fixing plate, 79 is a connecting stay, 80a and 80b are protective rubber sheets, and 81a and 81b are protective rubber sheets.

First, the sheet bundle holding will be described.

When the first sheet bundle S is stored and aligned on the storage tray 9, the sheet bundle nipping and conveying device 203 is waiting at the position of the storage tray 9, which is a standby position. At this time, the home positions (opening positions) of the movable grip plates 17a and 17b are
a, sensor flags 60a, 6 attached to 17b
0b and the height detection sensors 62a and 62b attached to the sensor attachment plates 61a and 61b, and the open position thereof is determined by the fixed grip plates 16a and 1b.
6b is a position where the maximum sheet bundle thickness tmax + α (a margin) is obtained.

For example, the upper limit of the number of stacked bundles is 80 g /
For 200 sheets of m ² , the maximum sheet bundle thickness tmax is about 35 mm in consideration of the thickness of the air layer of the sheet bundle S. In the present embodiment, the margin α is 20 mm
And Thus, before the first sheet bundle S is sandwiched, the movable grip plates 17a and 17b are separated from the fixed grip plates 16a and 16b by a predetermined distance (α) from the maximum sheet bundle thickness tmax of the sheet bundle to be bound. This means that it has moved to the position.

When a predetermined number of aligned sheet bundles S are completed on the storage tray 9, the sheet bundle nipping pulse motors 50a and 50b operate and the torque limiters 91a and 91b rotatably supported by the output shafts 92a and 92b. The fifth relay gears 93a and 93b, which are rotatably supported by the motor, the sixth relay gears 94a and 94b mounted on the mounting plates 53a and 53b, and the relay gear shafts 95as and 95bs fixedly supported on the mounting plate 53. The seventh relay gears 95a and 95b and the eighth relay gears 96a and 96
6b, and first and second relay gears 56a, 56b, 57a, 57b attached to the gear attachment plates 54a, 54b.
The driving force is transmitted to the rack portions 58a ₁ and 58b ₁ of the drive racks 58a and 58b attached to the linear guides 59a and 59b attached to the gear attachment plates 54a and 54b via the gears.

As a result, the movable grip plates 17a, 17b attached to the drive racks 58a, 58b move, and the sheet bundle S is moved to the fixed grip plates 16a, 16b attached to the attachment plates 53a, 53b.
And press the protective rubber 80a, 80b, 81a, 81b
, The sheet bundle S is pinched.

At this time, the movable grip plates 17a,
The number of pulses of the sheet bundle nipping pulse motors 50a and 50b is controlled so that the nipping amount of 17b becomes tmax + α. Here, the first sheet bundle S is made up of the movable grip plates 17a and 17b and the fixed grip plates 16a and 16b.
Assuming that the sandwich bundle thickness when sandwiched by b is t1,
The actual moving amount of the movable grip plate 17 is (tmax
+ Α) -t1.

Here, the sheet bundle sandwiching pulse motors 50a and 50b are operated by the pulse number p1 of tmax + α, but the amount of movement t1 is reduced by the torque limiters 91a and 91b slipping, so that the sheet bundle An excessive load is not applied to the sandwiching pulse motors 50a and 50b. Therefore, the movable grip plates 17a, 17b can obtain a clamping force proportional to the force of the torque limiters 91a, 91b.

Next, the sheet bundle conveying drive will be described.

When the nipping of the sheet bundle S is completed by the movable grip plates 17a, 17b and the fixed grip plates 16a, 16b, the sheet bundle transport pulse motor 7
6a and 76b are operated, and the sheet bundle transport drive belt 77
Drive is transmitted to a and 77b. The sheet bundle transport driving belts 77a and 77b are connected to belt fixing plates 78a and 78b.
It is attached to the attachment plates 51a and 51b via a connecting stay 79 by 78b (see FIG. 10).

On the other hand, the linear guides 52a ₁ , 52a ₂ , 52b ₁ , 52b ₂ are provided on the mounting plates 51a, 51b.
The second mounting plate plates 53a and 53b are attached via a, and a positioning second roller (not shown) is attached, and the sheet holding / aligning device 202 in the sheet storage / alignment device 202 is operated by an alignment portion height regulating member (not shown). The transport device 203 (2
03a, 203b) is regulated so that the sheet stacking surface of the storage tray 9 and the sheet holding surface height of the fixed grip plates 16a, 16b substantially coincide with each other. The mounting plates 51a and 51b themselves are mounted on slide members (not shown) of the slide rails 75a and 75b.

On the other hand, the slide rails 75a and 75b
When the sheet bundle conveyance pulse motors 76a and 76b are operated by the support member side plates 74a and 74b, the sheet clamping / conveying device 203 causes the sheet storage / conveyance device 203 to store and store the sheets.
It is possible to move between the aligning device 202 and the tape heating device 204.

The sheet bundle holding / conveying devices 203a and 203b shown in FIG. 10 are provided with holding position detection sensor flags 71a and 71 mounted on the mounting plates 51a and 51b.
1b and the holding position detection sensors 72a, 72b attached to the holding position detection sensor attachment plates 73a, 73b attached to the support side plates 74a, 74b. Similarly, at the tape heating position (see FIG. 7A) and the binding bundle transfer position (see FIG. 7B) of the tape heating device 204, the nipping position detection sensor flags 71a and 71b and the nipping position detection are performed. The sensor 72a,
The position is substantially determined by 72b.

The two sheet bundle holding / conveying devices 20
Either 3a or 203b is connected by a connecting stay 79 so as to be movable by a predetermined amount in the sheet bundle vertical feeding direction (front and rear), whereby the sheet bundle conveying pulse motor 76 is connected.
The sheet bundle nipping / conveying devices 203a and 203b are capable of controlling a predetermined amount of independent position by a and b.

Next, a method for detecting the sandwich bundle thickness of the sheet bundle S will be described.

When the sheet bundle S is clamped, the sheet bundle clamping pulse motors 50a and 50b are operated by the pulse number p1 for moving the movable grip plates 17a and 17b by tmax + α, as described above. , 17b move only (tmax + α) -t1.

This is because the drive racks 58a, 58
8b while being engaged with the first and second relay gears 56a, 56b.
b, 57a, and 57b also indicate that they rotate only by (tmax + α) -t1 and the seventh relay gears 95a, 95
5b also rotates only by (tmax + α) −t1, and the relay gear shafts 95as and 95bs fixedly supporting the relay gears 95a and 95b also have (tmax + α) −
This indicates that the rotation is performed only for t1.

By the way, this relay gear shaft 95as has
As shown in FIG. 12, a disk 99a in which a slit 100 is formed is mounted, and the slit 100 is mounted on a mounting plate 53a via a sensor mounting plate 98 as shown in FIG.
To read.

On the other hand, the bookbinding apparatus 1 is provided with a control device 200 for controlling the entire bookbinding operation as shown in FIG. 1, and the control device 200 has a pinch using such an encoder. The rotation speed information of the relay gear shaft 95as is input from the sandwiched sheet bundle thickness detecting device 210, which is a sheet bundle thickness detecting means.

Here, the relay gear shaft 9 which is one of the driving units of the driving means for moving the movable grip plates 17a and 17b in the sheet bundle nipping direction and the nipping release direction as described above.
By detecting the number of rotations of 5 as, (tmax +
α) -t1 is known. That is, as described above, tma
Assuming that x = 35 mm and α = 20 mm, (tmax +
α) is a known value of 55 mm. Therefore, by detecting the rotation speed of the relay gear shaft 95as, the holding bundle thickness t1 is obtained.
Can be detected.

Then, based on the nipping bundle thickness t1 detected in this way, the control device 200, which is a control means, moves the movable grip plates 17a and 17b by t1 + α when nipping the second bundle. The number of pulses of the motors 50a and 50b is controlled. As a result, the holding amount is changed from tmax + α to t1 + α, and (tmax−
t), and the amount of opening movement changes from (tmax + α) -t to α, and (tmax-t)
The opening time and the holding time of the movable grip plates 17a and 17b can be reduced.

Next, the operation of nipping the second and subsequent sheet bundles will be described.

When the first sheet bundle is transferred to the receiving tray 27 at the bookbinding transfer position, the movable grip plate 17
a and 17b open to release the clamping. Assuming that the opening amount at this time is α, the movable grip plate 17a,
The open position of 17b is t1 + α. After the bookbinding bundle is delivered, the sheet nipping / conveying device 203 returns to the aligned sheet nipping position of the sheet aligning device 202 with t1 + α opened.

When a predetermined number of second sheet bundles S are stored and aligned, the control device 200 controls the pulse motors 50a and 50b so that the movable grip plates 17a and 17b move by t1 + α. Similarly, when the sheet bundle thickness of the Xth bundle is tx, the movable grip plate 17
a and 17b are opened by α at the time of delivery, and t
Move by x + α. Note that tx ≦ tmax
It is.

As a result, as the sheet bundle thickness t is smaller, the holding time and the opening and closing time can be reduced. Further, by setting the holding amount tx + α with respect to the opening position tx + α, the sheet bundle S can be reliably held.

Next, a method of selecting a bind tape will be described.

As described above, the tape transport device 205 has two tape reels R1 and R2, around which bind tapes 26 having different widths are wound. In the present embodiment, a wide bind tape is wound around the first tape reel R1, and a narrow bind tape is wound around the second tape reel R2.

On the other hand, in this case, the control device 200 operating as the supply tape control means is the
Based on the sheet bundle thickness information detected by the step 10, the binding tape corresponding to the bookbinding bundle thickness t1 is selected. Here, the minimum sandwich sheet bundle thickness is Tmin, the maximum sandwich sheet bundle thickness is Tmax, and (Tmax + Tmin) / 2 =
If the sheet bundle thickness t detected by the sandwiched sheet bundle thickness detecting device 210 is smaller than Tc, the narrow bind tape wound on the second tape reel R2 is selected. When the sheet bundle thickness t is larger than Tc, the wide bind tape 26a wound on the tape reel R1 is selected.

Here, the bundled sheet bundle thickness is almost equal to the bookbinding bundle thickness at the time of bookbinding, so that an optimum tape for the bundle thickness can be selected regardless of the sheet basis weight and paper type. Then, by supplying the tape heating device 204 with the bind tape having the optimum width according to the thickness of the sandwiched sheet bundle, appropriate heat bonding can be performed.

[0069]

As described above, according to the present invention, the nipping sheet bundle thickness detecting means detects the nipping sheet bundle thickness, and the movable side nipping means is moved by a distance corresponding to the detected nipping sheet bundle thickness. By moving the sheet bundle in the nipping direction and the nipping releasing direction, the nipping and releasing operation of the sheet bundle nipping means can be accelerated. By speeding up the operation of releasing and holding the sheet bundle holding means,
Binding time can be shortened.

Further, by selectively supplying a bind tape having an optimum width to the tape heating device according to the thickness of the sandwiched sheet bundle, the bind tape can be appropriately heated and adhered to the sheet bundle.

[Brief description of the drawings]

FIG. 1 is a diagram showing a structure of a bookbinding apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view of a sheet storage / alignment device and a sheet bundle holding / conveying device of the bookbinding device.

FIG. 3 is a diagram illustrating a sheet nipping / transporting operation of the sheet bundle nipping / transporting apparatus.

FIG. 4 is a diagram illustrating a state in which a bind tape is transported into a carriage transport body by the tape transport device of the bookbinding apparatus.

FIG. 5 is a diagram showing a state in which the carriage conveyance body moves from a tape receiving position to a tape delivering position.

FIG. 6 is a diagram showing a state in which the bind tape is supplied to a center heater.

FIG. 7 is a diagram illustrating a sheet nipping / transporting operation of the sheet bundle nipping / transporting device at the time of binding a sheet bundle.

FIG. 8 is a diagram illustrating a state in which the bound sheet bundle is stored in a storage stacker.

FIG. 9 is a side sectional view of the sheet holding / conveying device located at a sheet holding position.

FIG. 10 is a side view of the sheet holding / conveying device as viewed from a tape heating device side.

FIG. 11 is a top view of the sheet holding / conveying device.

FIG. 12 is a diagram showing a configuration of a sandwich sheet bundle thickness detecting device of the bookbinding device.

FIG. 13 is a diagram illustrating a detection operation of the sandwiched sheet bundle thickness detection device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bookbinding apparatus 16a, 16b Fixed grip plate 17a, 17b Movable grip plate 26 Bind tape 50a, 50b Sheet bundle clamping pulse motor 95as Relay gear shaft 200 Control device 201 Sheet transport device 202 Sheet storage / alignment device 203 Sheet bundle gripping / transport device 204 Tape heating device 205 Tape transport device 210 Nipping sheet bundle thickness detection device R1, R2 Tape reel S Sheet bundle SC Bookbinding completed product

Claims (7)

[Claims] 1. A sheet bundle is conveyed from a standby position to a tape heating device that moves while pinching a sheet bundle and heat-bonds a bind tape to the sheet bundle, and is conveyed to a transfer position for transferring a bookbinding bundle that has been tape-heated and bonded. After that, in a bookbinding apparatus provided with a sheet bundle holding and conveying device having a sheet bundle holding means returning to the standby position in the holding release state, the movable side holding means and the fixed side holding means constituting the sheet bundle holding means; Drive means for moving the movable-side holding means in the sheet bundle holding direction and sheet holding release direction; holding sheet bundle thickness detecting means for detecting the sheet bundle thickness of the sheet bundle held by the sheet bundle holding means; Based on the detection signal from the thickness detection means,
Control means for controlling the driving means so as to move the movable-side holding means in the holding direction and in the holding release direction by a distance corresponding to the thickness of the held sheet bundle. . 2. The holding sheet bundle thickness detecting means detects the holding sheet bundle thickness based on the amount of movement of the movable side holding means when holding the sheet bundle. The bookbinding device as described. 3. The apparatus according to claim 2, wherein the nipping sheet bundle thickness detecting means detects the amount of movement of the movable side nipping means based on the amount of movement of a driving unit of the driving means for moving the movable side nipping means. Item 3. The bookbinding device according to Item 2. 4. The control device according to claim 1, wherein when the holding is released at the transfer position, the movable holding device is moved from the fixed holding device to a position separated by a predetermined distance from the detected holding sheet bundle thickness. 2. The bookbinding device according to claim 1, wherein the driving unit is controlled. 5. The control unit separates the movable holding unit from the fixed holding unit by a predetermined distance from a maximum sheet bundle thickness of a sheet bundle to be bound before clamping the first sheet bundle. 2. The bookbinding apparatus according to claim 1, wherein the bookbinding apparatus is moved to a position. 6. The control means detects the movable-side holding means based on the holding sheet bundle thickness detected by the holding sheet bundle thickness detecting means when holding the next sheet bundle after the delivery of the sheet bundle. 2. The bookbinding apparatus according to claim 1, wherein the apparatus is moved in the holding direction longer than the sheet bundle thickness by the predetermined distance. 7. A tape supply unit having several types of bind tapes having different widths to be supplied to the tape heating unit, and a thickness of the nipped sheet bundle based on a detection signal from the nipping sheet bundle thickness detection unit. 2. The bookbinding apparatus according to claim 1, further comprising: a supply tape control unit that controls the tape supply unit so as to selectively supply a bind tape having an optimum width to the tape heating device according to the following.