JP5243293B2 - Ejector paper feeder for bookbinding machine and bookbinding system using ejector paper feeder - Google Patents

Description

  The present invention relates to a sheet feeding device that is used in a bookbinding machine and feeds sheets relating to bookbinding such as signatures and covers, and a bookbinding system using the sheet feeding device.

  In various bookbinding machines such as a collating machine, a perfect binding machine, a saddle stitching machine, and a pasting machine, a large number of paper feeding devices for feeding sheets related to bookbinding such as signatures, covers, postcards, and pages are used. Yes. For example, taking a collating machine as an example, a plurality of pieces on which a large number of signatures can be stacked are arranged, and each piece is placed at the lowest position among the stacked signatures by a paper feeder. A single signature is picked up and pulled out. The drawn signatures are sequentially stacked on the signatures conveyed on the conveyance path by the conveyor.

  In such a conventional sheet feeding device, as shown in FIG. 7, a pipe from one mechanical vacuum pump 70 is branched by a plurality of switching valves 72, and an electromagnetic valve 76 provided in the branch pipe 74 is further provided. The negative pressure is supplied to the suction heads 80 assigned to the respective frames. A suction head 80 corresponding to a plurality of pieces 78 is assigned to one branch pipe 74, and a piece 78 to be collated and a piece 78 not to be collated are switched by an electromagnetic valve 76. For the piece 78 that performs collation, the supply of the negative pressure to the suction head 80 is switched by turning on / off the switching valve 72, and the suction head 80 is turned on at the timing of the negative pressure supply to the suction head 80. Sheets are adsorbed and fed.

JP-A-8-67401

  However, such a sheet feeding device has a problem that the power consumption by the vacuum pump is high and the running cost is expensive. Since a mechanical vacuum pump cannot be easily turned on and off, it must always be in operation. In addition, since a plurality of pieces of paper feeding devices are driven by one vacuum pump, even if there is a piece that does not collate among the plurality of pieces, the vacuum pump must be operated. For these reasons, there is a problem that it is difficult to save energy. In addition, the mechanical vacuum pump has a problem that the noise is large.

  Further, since the distance between the switching valve and the suction head is long, there is a problem that the suction force remains in the suction head due to residual pressure even when the switching valve is turned off. Therefore, conventionally, in order to eliminate this residual pressure, the blower is blown to cancel the remaining suction force, and there is a problem that a separate blower is required.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and is capable of reducing running costs, saving energy, and reducing noise, and a bookbinding system using the ejector paper feeder. The purpose is to provide.

In order to achieve the above-described object, the invention described in claim 1 is a sheet feeding device that is attached to a bookbinding device and sucks and supplies sheets according to bookbinding to a predetermined position.
At least one suction head that is capable of contacting the sheets, and that is attracted to the sheets and movable together with the sheets by a predetermined amount;
An ejector that is supplied with compressed air and generates a negative pressure from the compressed air;
A communication means for communicating the suction head and the ejector to supply the negative pressure generated by the ejector to the suction head ;
A dust removal port is formed in the ejector, and a dust removal flow path is formed from the dust removal port through the inside of the ejector, the communication means, and the suction head. It characterized that you have and can pass through the dust removal flow path from the removal port toward the suction head.

  The invention described in claim 2 is characterized in that the communication means described in claim 1 is flexible, and the suction head is movable relative to the ejector.

  According to a third aspect of the invention, in the first or second aspect of the invention, at least one ejector is assigned to a plurality of suction heads that simultaneously suction the same sheet.

The invention described in claim 4 is a bookbinding system for producing a book from sheets, wherein the bookbinding system uses the ejector paper feeder for a bookbinding machine according to any one of claims 1 to 3. And

The invention according to claim 5 is characterized in that compressed air from an air supply source for the operating part in the bookbinding system according to claim 4 is supplied to the ejector.

According to a sixth aspect of the present invention, the bookbinding system according to the fourth or fifth aspect includes a collating machine having a plurality of pieces on which signatures are stacked, and the ejector paper feeding device for the bookbinding machine includes: It is provided for each piece.

According to a seventh aspect of the present invention, the bookbinding system according to any one of the fourth to sixth aspects includes a sheeting device for separating sheets, and the sheeting device is supplied with compressed air, A second ejector that generates a negative pressure from the compressed air, draws the atmosphere by the negative pressure and discharges the amplified flow rate, and blows the air discharged from the second ejector to the sheets; It is characterized by.

  According to the present invention, the sheet is adsorbed by the negative pressure generated by the ejector from the compressed air, whereby the power consumption can be reduced and the running cost can be reduced. Since the distance of the communication means from the ejector to the suction head can be shortened, the amount of compressed air used can be made small by using a small ejector. Moreover, the responsiveness with respect to on / off switching is good, the residual pressure does not remain, and the blower from the blower to the suction head can be made unnecessary.

  Since a conventional mechanical vacuum pump is not necessary, noise reduction can be achieved.

  By making the suction head movable relative to the ejector, the ejector can be arranged separately from the suction head. As a result, the degree of freedom in mounting and dimensions of the ejector can be increased, and the diameter of the flow path in the ejector can be increased. For this reason, it can be set as the structure which is hard to clog garbage.

  By forming a dust removal port on the ejector and passing compressed air through a dust removal flow path from the dust removal port to the suction head, dust collected by the suction means and the communication means and the ejector is removed. be able to. In the dust removal flow path, the inside of the ejector is upstream of the communication means and suction head, and compressed air flows from the inside of the ejector to the outside. The dust accumulated in the ejector can be pushed out to the outside, and the dust can be reliably removed.

  By using the above-mentioned ejector paper feeder for bookbinding machine in the bookbinding system, a mechanical vacuum pump can be eliminated from the bookbinding system.

  By supplying compressed air from the air supply source of the operating unit in the bookbinding system to the ejector, the air supply source can also be used, and further energy saving can be achieved.

  By providing the above-mentioned bookbinding machine ejector feeding device for each piece of the collating machine, it is possible to operate / inactivate the bookbinding machine ejector paper feeding device for each piece according to whether or not collation is performed. Thus, energy saving can be achieved.

  Moreover, since the blower device has an ejector, the blower device can be made unnecessary, and further noise reduction and energy saving can be achieved.

It is sectional drawing of the paper feeder by this invention. FIG. 2 is an internal circuit diagram of an ejector of the paper feeding device in FIG. 1. It is a side view which shows the example which has arrange | positioned the paper feeder of FIG. 1 to the collator. FIG. 2 is an overall view of a bookbinding system to which the sheet feeding device of FIG. 1 can be applied. FIG. 4 is a side view of a portion different from FIG. 3 illustrating an example in which the sheet feeding device of FIG. 1 is arranged in a collator. FIG. 6 is an internal circuit diagram of an ejector of the rolling device of FIG. 5. It is a circuit diagram of a conventional paper feeder.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The example of FIG. 1 is a cross-sectional view of a paper feeding device 10 of the present invention. The sheet feeding device 10 includes a suction head unit that sucks target sheets.

  The suction head unit includes an ejector holder 12, an ejector 14 held in the ejector holder 12 by the ejector holder 12 and the holder cap 13, and one end connected to the ejector holder 12 via a mounting bracket 15. Hose 16, a head holder 18 to which the other end of each hose 16 is connected via a mounting bracket 17, a rod 19 for connecting a plurality of head holders 18 to each other, and mounting to the head holder 18 via a mounting bracket 20. The suction head 22 is provided.

  A flow path is formed in the ejector holder 12, and specifically, an inflow path 12a into which compressed air flows, a suction path 12c, and a dust removal suction into which compressed air for removing dust flows. A flow path 12d is formed.

  The inflow passage 12 a is connected to an air compressor 26 as an air supply source via a one-way valve 23, a valve 24, and a regulator 28, and the dust removal suction flow path 12 d is connected to the air compressor 26 via a valve 30. The As the air compressor 26, a dedicated air compressor or an air compressor for other applications can also be used. The valves 24 and 30 are connected to a control unit (not shown) and controlled to be turned on / off.

  The ejector 14 generates a negative pressure due to a decrease in pressure when the compressed air passes through the nozzle 14e (see FIG. 2) and expands due to the ejector effect, and the ejector holder 12 has an inflow path 12a and a holder cap 13. Between the exhaust passage 13a opened to the atmosphere. FIG. 2 is a circuit diagram showing a schematic structure of the ejector 14. The inflow port 14 a directly connected to the inflow path 12 a, the exhaust port 14 b directly connected to the exhaust path 13 a of the holder cap 13, and the suction path 12 c It has a suction port 14c that is directly connected and a dust removal port 14d that is directly connected to the dust removal flow path 12d.

  The suction path 12 c is branched in the ejector holder 12, and each branch end portion thereof communicates with each hose 16. Further, each hose 16 is communicated with a flow path 18 a formed in the head holder 18 and is communicated with the suction head 22. These suction path 12c, hose 16, flow path 18a and the like constitute communication means.

  As shown in FIG. 3, the sheet feeding device 10 configured as described above can be disposed, for example, on each piece 40 of the collating machine.

  Each piece 40 is provided with a stacking unit 42 on which signatures 35 as sheets are stacked, and the suction heads 22 of the sheet feeding device 10 are disposed below the stacking unit 42. The rods 19 that connect the head holders 18 of the respective suction heads 22 are connected to a rotating plate 43 that reciprocally rotates around a rotating shaft 43a by a driving source (not shown).

  By the rotation of the rotation plate 43, the suction head 22 performs a reciprocating rotation operation that comes in contact with and separates from the stacking portion 42, and the valve 24 is switched on / off in synchronization with this reciprocation operation.

  The ejector holder 12 of the paper feeding device 10 is disposed on a fixed plate portion 46 below the stacking portion 42. The hose 16 connects the ejector holder 12 disposed on the fixed side and the head holder 18 disposed on the movable side that performs the rotation operation with flexibility.

  Further, a vise type clamping machine 44 and a claw 48 that can clamp the signature 35 are arranged on the piece 40. The vise clamping machine 44 is configured to perform a reciprocating rotation operation that makes contact with and separates from the stacking portion 42 by a drive source. Instead of a vise clamper, a rotary clamper can also be used. Further, the claw 48 also performs a reciprocating rotation operation opposite to the reciprocating rotation operation of the suction head 22 so as to be in contact with and away from the stacking portion 42 around the rotation shaft 48a by a driving source.

  As shown in FIG. 4, a plurality of pieces 40 are aligned in a line along the conveyance path.

  According to the sheet feeding device 10 configured as described above, at the time of suction, the valve 24 is turned on, the compressed air from the air compressor 26 flows in from the inflow port 14a of the ejector 14, and is discharged from the discharge port 14b. As a result, a negative pressure is generated in the suction port 14 c of the ejector 14. At this time, the suction head 22 is moved to a position approaching the signature 35 so that the suction head 22 attracts the signature 35 of the stacking portion 42 and moves away from the stacking portion 42 while the signature 35 is sucked. It is possible to move the signature 35 together with the signature, and then turn off the valve 24 so that the signature 35 is clamped by the vise clamping machine 44.

  The vise clamper 44 further pulls out the clamped signatures 35 and stacks the pulled signatures on the signatures conveyed on the conveyance path below the piece 40.

  By adsorbing the sheets by the negative pressure generated by the ejector 14 in this way, the conventional mechanical vacuum pump becomes unnecessary, the power consumption can be reduced, the running cost can be reduced, and the noise is reduced. Can also be achieved.

  Since the distance of the communication means from the ejector 14 to the suction head 22 can be shortened, the amount of compressed air used can be made small by using the small ejector 14. For example, when the paper feeding is repeated 150 times per minute, the compressed air used can be about 7 L or less. Exhaust gas from the exhaust passage 13b flows into the atmosphere as it is, but has a slight flow rate and does not adversely affect the surroundings. Further, since the distance of the communication means from the ejector 14 to the suction head 22 can be shortened, the responsiveness to switching is good and the residual pressure does not remain. Therefore, it is possible to eliminate the need to blow air from the blower.

  Since the sheet feeding device 10 can be arranged for each frame, when there is a frame 40 that is not used, it is efficient to stop only the sheet feeding device 10 provided on the frame. In addition, the suction force can be adjusted for each piece 40. For example, if the sheets stacked on a certain piece 40 are very thin, lightweight, or have no waist, it is desirable to weaken the suction force. In that case, it is possible to adjust the suction force by the ejector 14 by adjusting the pressure of the compressed air by the regulator 28. In this way, stop / operation switching and suction force adjustment can be made in units of 40 pieces.

  By the way, when the paper feeding operation as described above is repeated, dust is also sucked from the suction head 22 and may enter and accumulate in the paper feeding device 10 to block the flow path. Dust enters from the suction head 22 and accumulates in the hose 16, the flow path in the ejector holder 12, and the flow path in the ejector 14. In order to prevent the accumulation of dust, it is necessary to periodically remove dust. For this reason, during a period when the sheet feeding operation is not performed, that is, in a state where the valve 24 is off, the valve 30 is turned on, and the compressed air is introduced into the ejector holder 12 from the dust removal suction flow path 12d.

  As a result, the normal air supply in which the air passes through the inside of the ejector 14 from the dust removal port 14d of the ejector 14 toward the suction port 14c, further passes through the suction path 12c and the hose 16 from the suction port 14c, and passes through the suction head 22. A dust removal flow path opposite to that during the paper operation is formed, whereby the dust accumulated in the flow path can be discharged from the suction head 22. In this dust removal flow path, the inside of the ejector 14 is located upstream from the hose 16 and the suction head 22, and since air flows from the inside of the ejector 14 to the outside, the dust accumulated in the ejector holder 12 and the like The dust accumulated in the ejector 14 does not pass through the ejector holder 12 and can be pushed out through the suction head 22 or the exhaust path 13a to reliably remove the dust. Can be done.

  This dust removal process may be performed for each paper feed, or may be periodically performed for each unit such as a plurality of paper feeds, time, and days.

  In the embodiment described above, the ejector holder 12 is provided separately from the head holder 18, and the ejector 14 and the suction head 22 are separated by a communication means such as a hose 16. The degree is increasing. For this reason, the flow path diameter in the ejector 14 can also be enlarged. For this reason, it can be set as the structure which is hard to clog garbage. However, the invention is not limited to this. The ejector 14 is held together with the suction head 22 by the head holder 18, the hose 16 between the ejector 14 and the suction head 22 is omitted, and the ejector 14 and the suction head 22 are connected to the head holder 18. It is also possible to communicate with each other through these channels.

  In the above-described embodiment, one ejector 14 is used for the two suction heads 22 and 22. However, the present invention is not limited to this, and the combination of the numbers is arbitrary. That is, one ejector may be used for one suction head, one ejector may be used for three or more suction heads, and a plurality of ejectors may be attached to one or more suction heads. You may use what was connected in parallel.

  In the above-described embodiment, an example in which the sheet feeding device 10 of the present invention is applied to a collating machine that stacks signatures and produces a text as a bookbinding device has been described. However, the present invention is not limited to this. For example, as shown in FIG. 4, the collating machine 50A, the wireless binding machine 50B for producing a book by combining the text and the cover, the stacking apparatus 50C for collecting a plurality of books, and cutting the book to a predetermined size. In the bookbinding system 50 provided with the three-way cutting machine 50D, the paper feeding device of the present invention can be applied not only to the above-described collating machine 50A but also to the feeding of the cover 36 in the wireless binding machine 50B. It is. In the bookbinding system 50, an air compressor is originally provided as an air supply source for various operating parts (such as an air cylinder), and each operating part performs operations such as book pressing and book feeding. The air compressor for the operating portion can also be used as the air compressor 26 for the ejector 14, and the compressed air from the air compressor 26 can be branched and supplied to the ejector 14. At this time, the amount of air consumed by the ejector 14 is very small, and it is not necessary to install a new air compressor 26 and the conventional vacuum pump can be swept away, so that further energy saving can be achieved.

  Further, as the bookbinding apparatus, the sheet feeding apparatus of the present invention can be similarly applied to collation in a saddle stitching machine and a pasting machine.

  Furthermore, an ejector similar to that shown in FIG. 2 can be used for the collator 50A, and the collator 50A can be used as a paper feeding device 60 as shown in FIG.

  As shown in FIG. 5, the rolling device 60 blows air near the bottom of the signatures stacked on the stacking unit 42 so as to roll the signatures and feed the signatures one by one. It comprises a pipe 62 and an ejector 14-1.

  As shown in FIG. 6, the ejector 14-1 can have substantially the same configuration as the ejector 14 shown in FIG. 2, but in the ejector 14-1, the suction port 14c is open to the atmosphere.

  When compressed air flows from the inflow port 14a to the exhaust port 14b, external air is attracted to the suction port 14c due to the negative pressure generated in the suction port 14c, so that the air discharged from the exhaust port 14b has a flow rate. The amplified air having the flow rate can be blown to the vicinity of the signature 35 via the pipe 62.

  By using such an ejector 14-1, a blower can be completely eliminated from the bookbinding system 50, and further noise reduction and energy saving can be achieved.

10 Paper feeder 12c Suction path (communication means)
14, 14-1 Ejector 14d Dust removal port 16 Hose (communication means)
18a Flow path (communication means)
22 Suction heads 35, 36 Sheets 40 Pieces 50 Bookbinding system 50A Collating machine 50B Wireless binding machine 50C Stacking device 50D Three-way cutting machine 60

Claims (7)

A sheet feeding device that is attached to a bookbinding device and sucks sheets related to bookbinding and supplies them to a predetermined position.
At least one suction head that is capable of contacting the sheets, and that is attracted to the sheets and movable together with the sheets by a predetermined amount;
An ejector that is supplied with compressed air and generates a negative pressure from the compressed air;
Communicating means for communicating the suction head and the ejector to supply the negative pressure generated by the ejector to the suction head;
Equipped with a,
A dust removal port is formed in the ejector, and a dust removal flow path is formed from the dust removal port through the inside of the ejector, the communication means, and the suction head. bookmaking machine ejector feeder for the removal port characterized that you have and can pass through the dust removal flow path toward the suction head.   2. The ejector paper feeding apparatus for a bookbinding machine according to claim 1, wherein the communicating means is flexible, and the suction head is movable relative to the ejector.   3. The ejector sheet feeding device for a bookbinding machine according to claim 1, wherein at least one ejector is assigned to a plurality of suction heads that simultaneously suction the same sheet. A bookbinding system for producing a book from sheets, wherein the ejector paper feeder for a bookbinding machine according to any one of claims 1 to 3 is used. The bookbinding system according to claim 4, wherein compressed air from an air supply source for an operation unit in the bookbinding system is supplied to the ejector. The bookbinding system has a respective collating machine having a plurality of frames signatures are stacked, the bookbinding machine ejector feeding apparatus according to claim 4 or characterized in that it is provided for each frame 5. The bookbinding system according to 5 . The bookbinding system has a sheeting device for sheeting, and the sheeting device is supplied with compressed air, generates negative pressure from the compressed air, and attracts external air by the negative pressure to be amplified. a second ejector for discharging the flow rate, bookbinding system according to any one of claims 4 to 6, characterized in that blowing the discharged air relative to the sheets from the second ejector.

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