JP4437418B2 - Clamper opening / closing mechanism of bookbinding machine - Google Patents

Description

  The present invention relates to a bookbinding machine, and more particularly, to a clamper opening / closing mechanism of the bookbinding machine.

For example, there is a bookbinding machine that performs so-called wireless binding, in which signatures are collected on the back of a book (booklet) that is created by collecting pages in a page order using a collating machine, and the cover is attached to the back of the glued booklet. Such a bookbinding machine is provided with a clamper for holding a booklet.
The part that sandwiches the booklet, called a clamper, is composed of a fixed clamp plate and a movable clamp plate, and opens and closes every time during operation to sandwich the booklet, but it responds to changes in the thickness of the booklet. It is essential that the clearance of the clamping portion can be changed. In other words, the thickness of the book bound by the machine varies, and when the booklet is supplied, if the clamper opening is larger than the booklet thickness, the booklet will not be stable. The opening amount of the fixed clamp plate and the movable clamp plate must be set to the maximum value, and the maximum value of the opening amount must be set to the thickest body thickness expected.

Conventionally, the clamper clearance adjustment, which has been done for the booklet thickness of small bookbinding machines, is to set the interval between the fixed clamp plate and the movable clamp plate slightly wider than the booklet thickness. The clearance is changed by replacing the spacers.
In addition, in a large bookbinding machine equipped with 15 or more clampers, it takes time to adjust the clearance of each clamper. Therefore, the clamper itself does not adjust the clearance, and the clamper is opened and closed for booklet clamping when the bookbinding machine is in operation. In many cases, the thickness of the booklet is dealt with by changing the clamper opening / closing gap by moving the position of the clamper opening / closing cam to be operated.

FIG. 6 is a plan view of a conventional bookbinding machine equipped with a clamper opening / closing mechanism that adjusts the opening / closing clearance of the clamper with a screw type, and a clamper 22 that holds a booklet at predetermined intervals is arranged on a chain 21 that moves around. A bookbinding processing unit (not shown) is arranged along the circulation path of the chain 21.
The clamper 22 includes a fixed clamp plate 24 and a movable clamp plate 25 whose positions are fixed to the chain 21, and the position of the clamper opening / closing cam 23 ′ having an inclined surface in the moving direction of the clamper 22 as the chain 21 moves. When the cam follower 27 attached to the metal fitting 26 comes into contact with the inclined portion of the cam 23 ′, the movable clamp plate 25 of the clamper 22 is separated from the fixed clamp plate 24, and the clamper 22 is opened. Then, after the booklet S is inserted between the fixed clamp plate 24 and the movable clamp plate 25 at the starting position X of the circular movement, when the clamper 22 comes to the inclined surface of the outlet end of the end of the clamper opening / closing cam 23, When the clamper 22 is gradually closed and separated from the cam 23, the booklet S is sandwiched between the fixed clamp plate 24 and the movable clamp plate 25 and moved to the next portion.

  When adjusting the interval between the fixed clamp plate 24 and the movable clamp plate 25 when the clamper 22 is opened, that is, the opening interval of the clamper 22, the adjustment clamp 29 of the adjustment screw 28 is rotated to rotate the movable clamp plate. The plate 25 approaches or separates from the fixed clamp plate 24, and the opening interval between the movable clamp plate 25 and the fixed clamp plate 24 can be adjusted according to the thickness of the booklet S (for example, see Patent Document 1).

  On the other hand, FIG. 7 is a plan view of a conventional bookbinding machine provided with a clamper opening / closing mechanism for changing the opening / closing clearance of the clamper by moving the position of the clamper opening / closing cam. A clamper 32 for holding the booklet is disposed and fixed. The clamper 32 includes a fixed clamp plate 34 and a movable clamp plate 35 whose positions are fixed to the chain 31. As in FIG. 6, the clamper 32 holds the booklet S inserted between the fixed clamp plate 34 and the movable clamp plate 35 at the start position X of the circular movement, and the bookbinding process is performed with the circular movement of the chain 31. The booklet that has been bound at the end position Y of the circular movement is released and discharged.

As shown in the figure, the clamper 32 of this clamper opening / closing mechanism is not provided with a mechanism for adjusting the interval between the fixed clamp plate 34 and the movable clamp plate 35, that is, the opening interval of the clamper 32, and when the clamper 32 is opened. When the distance between the fixed clamp plate 34 and the movable clamp plate 35 is adjusted, the ends of the clamp opening / closing cams 33 and 33 ′ are turned around the fulcrums P and P ′ by an electric motor (not shown). Thus, the opening distance of the clamper 32 is adjusted by moving it in either of the directions indicated by the arrows (see, for example, Patent Document 2).
Japanese Patent Laid-Open No. 9-220876 JP 55-146793 A

The clearance adjustment of the clamper opening / closing mechanism of the conventional bookbinding machine is performed as described above. However, if the clearance adjustment is performed by the screw type or the spacer replacement type, it is necessary to perform all the clearance adjustments of many clampers. It was a time-consuming task.
On the other hand, in the method of changing the clamper opening / closing clearance by moving the position of the clamper opening / closing cam, the clamper opening / closing stroke range is increased from the minimum thickness to the maximum thickness of the booklet, and the clamping spring incorporated in the clamper is also long. Since a stroke is required and it is difficult to obtain a strong clamping force, it is necessary to supplement the applied pressure by other methods. Also, when inserting the booklet, it is necessary to keep the clearance corresponding to the bookbinding thickness at a certain distance. However, when adjusting the clearance with the clamper opening / closing cam, if the booklet thickness is large, the booklet is not pinched and released. Therefore, it is necessary to open and hold the clamper using a ratchet claw or the like at the open position, and the structure must be complicated and expensive.

  For the reasons described above, a conventional binding machine with less than about 10 clampers uses a clamper opening / closing cam that is fixed and does not move. It was necessary to make adjustments by replacing screws and spacers.

  The present invention has been made in view of the above-described problem.Each time the bookbinding thickness changes, the clearance adjustment of the clamper clamping portion necessary for the operator every time can be reduced in both labor and time. It is an object to provide a clamper opening / closing mechanism.

The invention according to claim 1 of the present invention includes a clamper that has a fixed clamp plate and a movable clamp plate and moves the bookbinding process by holding a booklet by a spring action, and a clamper opening / closing cam provided on the bookbinding machine main body side When, a clamper opening and closing mechanism of the binding machine comprising a comprising a gap adjusting means for adjusting the opening gap between the clamp plate and the movable clamping plate of the clamper, and a position fine adjustment means of the clamper cams, the The adjustable amount of the clamper interval adjusting means is the total size of the change amount of the bookbinding thickness, and the adjustable amount of the fine position adjusting means of the clamper opening / closing cam is a predetermined range of the total size of the change amount of the bookbinding thickness. It is characterized by being.

  According to the first aspect of the present invention, it is possible to finely adjust the position of the clamper opening / closing cam provided on the bookbinding machine main body side while allowing the clearance adjustment of the booklet clamping portion of the clamper itself as before. Therefore, it is possible to change both the opening / closing position and the opening / closing amount of the clamper. For this reason, a change in the bookbinding thickness within a certain range can be performed only by fine adjustment of the opening / closing cam position of the clamper, and clearance adjustment of the clamper can be easily performed in a short time.

Further, according to the invention according to claim 1 of the present invention, the adjustable amount of the clamper opening / closing cam is a predetermined ratio of the total dimension of the change amount of the bookbinding thickness, for example, 20 to 30% of the total thickness. Adjustment corresponding to the thickness of the booklet can be performed without reducing the spring force of the clamper, and a ratchet mechanism or the like is not required, so that the structure of the clamper opening / closing mechanism can be simplified.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of a clamper opening / closing mechanism according to an embodiment of the present invention. In FIG. 1, 1 is a chain that circulates between bookbinding processing steps, 2 is a clamper that is disposed and fixed at predetermined intervals along the circulation path of the chain 1, and 3 and 3 'are clamper opening / closing cams Reference numerals 4 and 4 ′ denote eccentric shafts, and 5 and 5 ′ denote handles fixed to the eccentric shafts 4 and 4 ′.

  A booklet conveying means is constituted by the chain 1 and the clamper 2, and along the circular path of the chain 1, a milling section that performs processing for aligning the back face of a booklet (not shown), and a pasting process on the back face and throat section of the booklet after milling A bookbinding processing unit such as a gluing unit that performs a process of pasting a cover sheet on the gluing unit of the booklet by aligning the cover sheet supplied from the cover sheet supply device and the booklet is arranged.

2 and 3 are diagrams showing details of the clamper 2, FIG. 2 is a plan view of the clamper 2, FIG. 3A is a side view of the AA ′ cross section of FIG. 2, and FIG. It is BB 'sectional drawing of FIG.
As shown in the figure, the clamper 2 mainly comprises a movable clamp plate 6, a fixed clamp plate 7, metal fittings 8 and 9, and rack shafts 10 and 10 ′, and the fixed clamp plate 7 is fixed to the chain 1. The movable clamp plate 6 is slidably supported by rack shafts 10 and 10 'that slidably pass in the vicinity of both end portions of the fixed clamp plate 7, and each rack shaft 10 and 10' has one end portion. It is fixed to the metal fitting 8 and is fixed to the metal fitting 9 at the other end.

  The spring 11 is disposed between the metal fitting 8 and the fixed clamp plate 7 and is urged in a direction away from the fixed clamp plate 7, that is, a direction in which the clamper 2 is closed. An adjusting screw 12 having a feed screw is rotatably attached to the metal fitting 9, and a screw portion of the adjusting screw 12 is screwed to the movable clamp plate 6.

The adjustment screw 12 is used to adjust the distance between the movable clamp plate 6 and the fixed clamp plate 7 when the clamper 2 is opened, that is, the opening interval of the clamper 2, and is adjusted by rotating the adjustment knob 13. The screw 12 rotates, the movable clamp plate 6 approaches (closes) or separates (opens) the fixed clamp plate 7, and the opening interval between the movable clamp plate 6 and the fixed clamp plate 7 can be adjusted according to the thickness of the booklet. it can. The interval adjustable amount by this adjustment is set so as to correspond to the total dimension of the change amount of the bookbinding thickness, for example, 50 mm.
Further, since the chain 15 is stretched over the sprockets 14 and 14 ′ fixed to the adjustment screws 12 and 12 ′, the adjustment screw 12 ′ is rotated by rotating the adjustment knob 13, and both ends of the movable clamp plate 6 are rotated. Move by an equal distance.

  On the other hand, the fixed clamp plate 7 is provided with pinion gears 16 and 16 'that engage with racks provided on the rack shafts 10 and 10', and the pinion gears 16 and 16 'are synchronized when the clamper 2 is opened and closed. Therefore, the fixed clamp plate 7 is moved in parallel.

  Further, four guide rollers 18 are attached to roller fixtures 17 and 17 'provided below the fixed clamp plate 7, and these guide rollers 18 enter a groove (not shown) of the bookbinding machine body, Guide the clamper 2. Further, the metal fitting 8 is provided with a cam follower 19 that engages with the inclined surfaces of the clamper opening / closing cams 3, 3 ′.

  The clamper 2 that is sequentially emptied with the circular movement of the chain 1 is positioned at the starting position X of the circumferential movement of the clamper 2, and the booklet S that is sequentially subjected to bookbinding is supplied to the clamper 2. . That is, the booklet S inserted between the fixed clamp plate 7 and the movable clamp plate 6 at the starting position X of the circular movement is sandwiched between the two clamp plates, and passes through the bookbinding processing unit as the chain 1 rotates. The booklet that has been bound at the movement end position Y is unpinched and discharged.

  On the other hand, the clamper opening and closing cams 3 and 3 ′ can turn around one end of each of them, and the eccentric shaft 4 can be rotated by holding the handles 5 and 5 ′ in the hand and rotating them in any of the directions shown in the arrows. 4 ′ allows the cams 3 and 3 ′ to pivot about the fulcrums P and P ′, and the position on the pivoting movement end side (booklet clamping and releasing operation side) can be adjusted.

  FIGS. 1 and 2 show a state in which the handles 5 and 5 ′ are adjusted so that the distance between the movable clamp plate 6 and the fixed clamp plate 7 is the maximum when the clamper 2 is opened. FIGS. 2 shows a state in which the handles 5 and 5 ′ are adjusted so that the distance between the movable clamp plate 6 and the fixed clamp plate 7 when the 2 is opened is the minimum interval, and this position adjustable amount is the amount of change in the bookbinding thickness. The movable clamp plate 6 and the fixed clamp when the clamper 2 is opened when the handle 5 is rotated from the center position to the end in either direction, for example. The amount of movement is set so that the interval between the plates 7 changes by about ± 5 mm.

When bookbinding is performed, first, the distance between the movable clamp plate 6 and the fixed clamp plate 7 when the clamper 2 is opened is adjusted by the adjustment knob 13 of each clamper 2 according to the thickness of the booklet to be bound.
In this way, after adjusting the clearance of each clamper, when the bookbinding machine is operated, the clamper 2 moves with the movement of the chain 1, and comes to the position of the cam 3 ′ having an inclined surface in the moving direction of the clamper 2. When the cam follower 19 formed on the metal fitting 8 of the clamper 2 comes into contact with the inclined portion of the cam 3 ′, the metal fitting 8 moves toward the fixed clamp plate 7 against the action of the coil spring 11 as the clamper 2 moves. As a result, the movable clamp plate 6 is separated from the fixed clamp plate 7 and the clamper 2 is opened.

  This separation is for inserting the booklet S between the movable clamp plate 6 and the fixed clamp plate 7 at the start position X of the circular movement, and discharging the booklet that has been bound at the end position Y. The cam follower 19 of the bracket 8 is camped. 3, the clamper 2 gradually closes, and when the cam follower 19 moves away from the cam 3, the booklet is clamped by the movable clamp plate 6 and the fixed clamp plate 7, and the clamper 2 moves to the next milling section. To do.

  When the booklet of the above booklet is finished and the next booklet with a different thickness is bound, the difference between the thickness of the booklet to be bound next and the thickness of the booklet adjusted with the initial adjustment knob 13 is within ± 5 mm. Moves the handles 5, 5 'by the same angle according to the difference. Since the eccentric shafts 4 and 4 ′ are rotated by the movement of the handles 5 and 5 ′, and the cams 3 and 3 ′ are turned around the fulcrums P and P ′, the turning movement end side (the booklet holding and releasing operation side) is performed. Thus, the distance between the movable clamp plate 6 and the fixed clamp plate 7 when the clamper 2 is opened can be set to a desired interval.

  Conventionally, in a small bookbinding machine having less than about 10 clampers, it is necessary to adjust the clearance of all the clampers every time the thickness of the bookbinding product changes. As described above, the clamper opening / closing mechanism of the bookbinding machine of the present invention Accordingly, it is possible to perform the bookbinding operation only by adjusting the handle, which can be said to be a one-touch operation, for a small change in thickness dimension. In addition, since the increase in the required opening / closing stroke of the clamper itself is only a fixed amount, the booklet clamp amount by the built-in spring can be made equal to that of the conventional machine.

  Normally, the bookbinding thickness is often 5 to 15 mm or less, so if the opening distance of the clamper is adjusted to 10 mm at the beginning, the clearance adjustment work for the total number of clampers is performed during the bookbinding operation in these ranges. Therefore, the set time can be greatly reduced because it can be handled only by operating the steering wheel.

  In the above embodiment, the example using the screw type with the adjusting screw as the interval adjusting means for adjusting the opening interval between the fixed clamp plate and the movable clamp plate of the clamper has been described. The present invention can also be applied to a bookbinding machine provided with a clamp having.

It is a figure which shows the clamper opening / closing mechanism of one Example of this invention. It is a figure which shows the detail of the clamper of the clamper opening-and-closing mechanism of FIG. It is a figure which shows the cross section of the clamper of FIG. It is a figure which shows the state which the clamper opening space | interval of the clamper opening-and-closing mechanism of FIG. 1 became the minimum space | interval. FIG. 3 is a diagram illustrating a state where a clamper opening interval of the clamper of FIG. 2 is a minimum interval. It is a figure which shows the conventional clamper opening-and-closing mechanism which performs clearance gap adjustment of a clamper with a screw type. It is a figure which shows the conventional clamper opening / closing mechanism which changes the opening / closing clearance amount of a clamper by moving the position of a clamper opening / closing cam.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Chain 2 Clamper 3, 3 'Clamper opening / closing cam 4, 4' Eccentric shaft 5, 5 'Handle 6 Movable clamp plate 7 Fixed clamp plate 8, 9 Metal fitting 10, 10' Rack shaft 11 Spring 12 Adjustment screw 13 Adjustment knob 14, 14 'sprocket 15 chain 16 pinion gear 17, 17' roller fitting 18 guide roller 19 cam follower

Claims (1)

A clamper opening / closing mechanism of a bookbinding machine comprising a clamper that has a fixed clamp plate and a movable clamp plate and moves the bookbinding process by holding a booklet by a spring action, and a clamper opening / closing cam provided on the bookbinding machine body side. there are a distance adjusting means for adjusting the opening gap between the clamp plate and the movable clamping plate of the clamper, and a position fine adjustment means of the clamper cams, adjustable amount of spacing adjustment means of the clamper bookbinding A clamper for a bookbinding machine, characterized in that the total thickness change amount is adjustable and the adjustable amount of the clamper opening / closing cam position fine adjustment means is within a predetermined ratio of the total book thickness change amount. Opening and closing mechanism.

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