JP2010285267A - Sheet discharging device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the generation of noise, and to improve even durability in a sheet-like material discharge device. <P>SOLUTION: Paper 12 bitten in and carried to a biting claw device 11 is layered on a pile by dropping by being released from biting when a claw opening roller 14 slidingly contacts with a paper releasing cam 18. The paper releasing cam 18 is movably supported in the arrow A-B direction by a moving device in a guide bracket 17 via a rail member 21. The paper releasing cam 18 is regulated in dropping by being brought into pressure-contact and close-contact with the guide bracket 17 by an attraction force of a magnet 19 installed on the guide bracket 17. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a sheet discharge device for releasing a sheet and stacking it on a pile by bringing a traveling sheet holding device into sliding contact with a sheet release member.

  With this type of sheet discharge device, the conveyance of the sheet is intended to ensure that the sheets stacked on the pile are well aligned and that the stacked sheets are not damaged. The timing for releasing the sheet material from the sheet material holding device is changed depending on the speed, the thickness of the sheet material, the size of the sheet material, and the like. That is, as a conventional sheet discharge device, the gripper device that holds and transports the paper and the claw opening roller of the gripper device come into sliding contact to release the grip by the gripper device and release the paper. Some include a paper release cam, a cam holder to which the paper release cam is fixed and supported so as to be movable in the paper conveyance direction, and an air cylinder that moves the cam holder (see Patent Document 1).

  In this apparatus, when the paper transport speed is slower than a predetermined speed, control is performed to delay the timing of releasing the paper from the gripping claw device by the paper release cam by advancing the rod of the air cylinder. Therefore, since the paper can be released at a position very close to the paper pad, good paper alignment can be performed. Further, since the paper conveyance speed is low, the running inertia is small, so that even if the paper is released at a position close to the paper pad, the paper is not damaged when it collides with the paper pad. On the other hand, when the paper transport speed is faster than a predetermined speed, control is performed to make the timing of releasing the paper from the gripping claw device by the paper release cam by retracting the rod of the air cylinder. Therefore, even though the paper transport speed is high and the paper traveling inertia is large, the released paper will not hit the paper pad strongly, so the paper will be damaged. Good paper alignment can be performed.

Japanese Utility Model Publication No. 06-13174 (page 2, left column, line 38 to page 3, right column, line 23, FIGS. 1 to 3)

  In the conventional sheet discharging apparatus described above, a clearance is provided between the cam holder and a support member that guides the movement of the cam holder in order to move the cam holder smoothly. Since the clearance is provided in this way, when the claw opening roller of the gripper claw device comes into sliding contact with the paper release cam, the cam holder is lifted by the clearance roller, and then the gripper claw device releases the paper. When the claw opening roller passes through the cam and is separated from the paper releasing cam, the cam holder falls due to its own weight. When the cam holder is repeatedly raised and dropped in this way, the cam holder repeatedly collides with the guide surface of the support member, so that noise due to collision noise is generated and there is a problem in durability. Therefore, in order to prevent the cam holder from floating due to this clearance, a spring member is provided to press the cam holder in close contact with the guide member. However, this spring member may not function as a spring member when spray powder or paper powder adheres due to long-term use. When it does not function as a spring member, the cam holder is repeatedly raised and dropped, and eventually, noise and durability problems cannot be reliably regulated.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a sheet-like material discharge device that prevents noise and has improved durability. .

  In order to achieve this object, the present invention provides a sheet-like material holding device that holds and conveys a sheet-like material, and a sheet-like material releasing device that releases the holding of the sheet-like material by sliding contact with the sheet-like material holding device. In a sheet-like material discharge device comprising: a member; and a support member that is movably supported in the sheet-like material conveyance direction and is attached to a frame. A magnet that is attracted so as to be pressed against the member is provided.

  In the present invention, the magnet is embedded in the support member.

  According to the present invention, since the sheet-like object releasing member is pressed and brought into close contact with the support member by the magnet's attractive force, when the sheet-like object releasing member tries to slide with respect to the supporting member, the sheet-like object releasing member and A frictional resistance is generated between the surfaces in close contact with the support member. Therefore, when the sheet-like material holding device is brought into sliding contact with the sheet-like material releasing member, the raised state of the sheet-like material releasing member forcedly raised by the sheet-like material holding device is held. For this reason, even after the sheet-like material holding device passes through the sheet-like material releasing member, the sheet-like material releasing member does not fall at least due to its own weight. Since the release member does not repeat rising and falling, no noise is generated and durability is improved. Further, even if spray powder or paper powder adheres to the magnet, the attractive force by the magnet does not decrease, so that it is possible to permanently prevent the generation of noise and the decrease in durability.

  Further, according to one of the inventions, since the magnet is embedded in the support member, the sheet does not come into direct contact with the magnet, so the magnet does not fall off the support member. .

It is a front view of the paper discharge apparatus of the sheet-fed rotary printing machine which implemented the discharge apparatus of the sheet-like material which concerns on this invention. It is a front view which shows the principal part of the discharge apparatus of the sheet-like material which concerns on this invention. It is the III-III sectional view taken on the line in FIG. It is an enlarged view of the IV section in FIG. It is the VV sectional view taken on the line in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a sheet discharge device of a sheet-fed rotary printing press in which a sheet-like material discharge apparatus according to the present invention is implemented, FIG. 2 is a front view showing the main part, and FIG. 3 is a line III-III in FIG. 4 is an enlarged view of a portion IV in FIG. 3, and FIG. 5 is a cross-sectional view taken along the line VV in FIG.

  A sheet discharge device of a sheet-fed rotary printing machine, which is generally indicated by reference numeral 1 in FIG. The paper frame 2 is provided). Reference numerals 3 and 3 denote a pair of left and right sprockets (one sprocket 3 not shown) pivotally supported on the left and right discharge frames 2 and 2, respectively, and the left and right illustrations provided on the printing unit side are omitted. Between the sprockets, a pair of left and right discharge chains 4, 4 (one discharge chain 4 is not shown) that is driven from the driving side and travels in the direction indicated by arrow A in FIG. Yes. In FIG. 2, reference numerals 5 and 6 denote chain guides that regulate the travel locus of the paper discharge chain 4 by holding the paper discharge chain 4 from above and below.

  Between the left and right paper discharge chains 4, 4, a plurality of sets of claw rods composed of a claw shaft 7 and a claw base shaft 8 are suspended at a certain interval in the running direction of the paper discharge chain 4. A plurality of claws 9 and claw bases 10 are arranged in parallel with each other in the axial direction on each claw shaft 7 and claw base shaft 8. Thus, a gripper nail device 11 as a plurality of sets of sheet-like material holding devices is formed.

  The claw shaft 7 is rotatably supported, and is urged clockwise in the figure by a spring member provided at the end of the shaft. By this urging, the claw 9 is closed and the paper 12 is moved between the claw base 10 and the paper. Is configured to do. A lever 13 is pivotally attached to the end of the claw shaft 7, and a claw opening roller 14 is pivotally attached to the free end of the lever 13. When the claw opening roller 14 is brought into sliding contact with a cam surface 18a of a paper release cam 18, which will be described later, the claw 9 is opened against the elastic force of the spring member, and the paper 12 is released from the gripper. ing.

  Next, the paper release device will be described with reference to FIGS. The paper releasing device indicated by reference numeral 15 in FIG. 3 is supported by a guide bracket 17 as a support member attached to the paper discharge frame 2 via a stud 16 and movably supported by the guide bracket 17 in the direction of arrows AB. It is generally constituted by a paper releasing cam 18 as a sheet-like material releasing member. The guide bracket 17 is flat and formed in a substantially rectangular shape. As shown in FIG. 5, stepped portions 17a formed in a rectangular shape in front view are provided on the lower surface, and stepped portions are formed at both ends as shown in FIG. A pair of fitting holes 17b and 17b facing 17a are provided.

  As shown in FIG. 4, magnets 19 and 19 formed in a columnar shape are fitted and fixed in these fitting holes 17b and 17b, and one end face 19a of these magnets 19 is connected to the side face 17c of the stepped portion 17a. It is positioned at the same surface position. Reference numerals 20 and 20 denote bolts fitted to the guide bracket 17 so as to protrude into the stepped portion 17a. The bolts 20 and 20 include a rail member 21 which is an elongated rectangular parallelepiped and has a full length L1. It is fixed in close contact with the side surface 17c of 17a. Furthermore, spring receiving members 22 and 22 each having a flange 22a provided at one end thereof are screwed to the respective tip ends of the bolts 20 and 20.

  The lower surface of the paper release cam 18 is provided with a cam surface 18a with which the claw opening roller 14 of the gripper claw device 11 is slidably contacted. The central portion extends in the direction of the arrow AB, and the rail member described above. 21 is provided with a guide groove 18b fitted with a clearance. The total length L2 of the guide groove 18b is formed longer than the total length L1 of the rail member 21.

  In such a configuration, the paper release cam 18 is supported so as to be movable in the arrow AB direction along the stepped portion 17a of the guide bracket 17 by fitting the guide groove 18b to the rail member 21. In this state, the paper releasing cam 18 is shown in FIG. 5 by the elastic force of the compression coil spring 24 elastically mounted between the flange 22a of the spring receiving member 22 and the spring receiving ring 23 as shown in FIG. As described above, the side surface 18 d is pressed and brought into close contact with the side surface 17 c of the stepped portion 17 a of the guide bracket 17 through the spring receiving ring 23. At the same time, the side surface 18 d of the paper releasing cam 18 is pressed against and in close contact with the side surface 17 c of the guide bracket 17 by the attractive force of the magnet 19.

  Next, a moving device for moving the paper release cam 18 will be described with reference to FIG. A moving device generally indicated by reference numeral 25 in FIG. 1 includes a stepping motor 26 that is a driving source for moving the paper release cam 18, a chain 27 that transmits the driving of the stepping motor 26, and the chain 27. The screw rod 28 to which the drive is transmitted and the nut member 29 that is screwed into the screw rod 28 and moves in the direction of the arrow AB by the rotation of the screw rod 28 are generally constituted.

  The stepping motor 26 is attached to the paper discharge frame 2 via a bracket 30 and a sprocket 31 is attached to the output shaft 26a. A support member 32 having a U-shaped cross section is attached to the guide bracket 17 by a bolt 33. The shaft 28 a of the screw rod 28 is fitted into and inserted into support holes 32 a and 32 a provided in the support member 32, and the screw rod 28 is supported by the support member 32 by a retaining member 33 and a sprocket 34 that are attached to the shaft 28 a. Are supported rotatably in a state in which movement in the direction of the arrow AB is restricted. The chain 27 is stretched between the sprocket 34 and the sprocket 31.

  A small shaft 29 a is integrally projected on a part of the outer peripheral portion of the nut member 29, and the small shaft 29 a is fitted into a fitting hole 18 c provided at one end of the paper release cam 18 described above. . In such a configuration, when the stepping motor 26 is driven in one direction, this drive is transmitted to the screw rod 28 via the chain 27, and the screw member 28 rotates in one direction, whereby the nut member 29 is moved in the direction of arrow A. Therefore, the paper release cam 18 also moves in the direction of arrow A and is positioned at the position indicated by the solid line in FIG.

  On the other hand, when the stepping motor 26 is driven in the other direction opposite to one direction, this drive is transmitted to the screw rod 28 via the chain 27, and the screw rod 28 rotates in the other direction opposite to the one direction. Since the nut member 29 moves in the direction of the arrow B, the paper release cam 18 also moves in the direction of the arrow B and is positioned at a position indicated by a two-dot chain line in FIG.

  In FIG. 1, a paper stacking table 35 is provided below the paper release device 15 so as to be movable up and down. A pair of upper and lower plate cutting plates 37 with a cross bar 36 interposed on the paper stacking table 35. And the paper 12 that falls with the nail 9 being released is loaded on the plate cutting plate 37. Reference numeral 38 denotes a suction wheel that sucks and decelerates the paper 12 conveyed by the gripper device 11 and stabilizes the conveying and dropping posture. Reference numeral 39 denotes a paper pad for bringing the front end of the falling paper 12 into contact with each other.

  Next, a paper discharging operation in the sheet discharging apparatus configured as described above will be described. The paper 12 printed by the printing unit is held by the claw 9 and the claw base 10 of the gripping claw device 11 and conveyed along with the travel of the paper discharge chain 4. When the claw opening roller 14 reaches the paper release cam 18, the claw opening is performed. The roller 14 is pressed by the cam surface 18a. Therefore, since the claw 9 opens against the elastic force of the spring member, the paper 12 is released from the nail 9 and falls.

  The falling paper 12 is sucked by the suction wheel 38 and decelerated, and the posture is stabilized when the front end comes into contact with the paper pad 39, and the paper ends are aligned and stacked on the plate cutting plate 37. When a predetermined amount of the paper 12 is stacked, the paper stack 35 is dropped by a push button operation, and the paper 12 is continuously stacked by placing a new rung and a plank.

  In such a configuration, when the conveyance speed of the paper 12 is switched from high speed to low speed, the stepping motor 26 is driven in one direction by the control device of the apparatus. 2 Positioned at a position indicated by a solid line. Therefore, the claw opening roller 14 of the gripping claw device 11 comes into contact with the paper release cam 18 slowly, so that the release of the paper 12 from the gripping is delayed. For this reason, the paper 12 can be separated at a position very close to the paper pad 39, the alignment of the paper is good, and the transporting speed of the paper 12 is low, so the running inertia is small. Even when separated at a position very close to the pad 39, the paper 12 is not damaged by colliding with the paper pad 39.

  On the other hand, when the conveyance speed of the paper 12 is switched from low speed to high speed, the stepping motor 26 is driven in the other direction opposite to the one direction by the control device of the apparatus, so that the paper release cam 18 moves in the arrow B direction. 2 is positioned at a position indicated by a two-dot chain line in FIG. Accordingly, the claw roller 14 of the gripping claw device 11 quickly comes into contact with the paper release cam 18, so that the release of the paper 12 from the gripping is accelerated. Therefore, even if the traveling inertia increases because the conveyance speed of the paper 12 is high, the paper 12 does not hit the paper pad 39 strongly, and the paper discharge is stabilized.

  Here, when the claw opening roller 14 of the gripping claw device 11 contacts the cam surface 18 a of the paper release cam 18, the paper release cam 18 is slightly lifted by the clearance between the guide groove 18 b and the rail member 21. The lifted paper release cam 18 is brought into pressure contact with and closely contacted with the guide bracket 17 by the elastic force of the compression coil spring 24 and the attractive force of the magnet 19. Therefore, a frictional resistance is generated between the side surfaces 18d and 17c of the paper release cam 18 and the guide bracket 17 that are in close contact with each other, so that the paper release cam 18 is maintained in a lifted state. For this reason, even after the claw opening roller 14 passes through the cam surface 18a of the paper release cam 18, this state is maintained by the resilient force of the compression coil spring 24 and the attractive force of the magnet 19, so that the paper release cam Even if 18 slides by its own weight and slides down, it does not fall.

  Therefore, every time the claw opening roller 14 passes the cam surface 18a of the paper release cam 18, the paper release cam 18 does not move up and down violently, so that no noise is generated and durability is improved. At this time, spray powder or paper powder adheres to the compression coil spring 24, so that the compression coil spring 24 may not function as a spring member, or spray powder or paper powder may adhere to the end surface 19a of the magnet 19. is there. Even in this case, since the attracting force by the magnet 19 does not change and the attracting force does not decrease, the paper releasing cam 18 is pressed against the guide bracket 17 by the attracting force of only the magnet 19 and is in close contact therewith. The lifted state of the paper release cam 18 can be maintained. Therefore, it is possible to permanently prevent the generation of noise and the decrease in durability.

  In this embodiment, one end face 19a of the magnet 19 is fitted and fixed to the fitting hole 17b so as to face the stepped portion 17a of the guide bracket 17, but it can be attached using a bracket or the like, or the magnet 19 can be attached to the guide bracket. You may fix in the state embedded in 17. In this case, the paper release cam 18 does not directly contact the magnet 19, so that the magnet 19 can be prevented from dropping from the guide bracket 17.

  DESCRIPTION OF SYMBOLS 1 ... Sheet discharge device of sheet-fed rotary printing machine, 4 ... Paper discharge chain, 9 ... Nail | claw, 11 ... Holding nail device (sheet-like material holding device), 12 ... Paper (sheet-like material), 14 ... Roll for nail opening , 15 ... Paper releasing device, 17 ... Guide bracket (support member), 18 ... Paper releasing cam (sheet-like material releasing member), 18a ... Cam surface, 19 ... Magnet, 21 ... Rail member, 24 ... Compression coil spring, 25 ... Moving device, 26. Stepping motor, 27. Chain, 28. Screw rod, 29. Nut member, 39.

Claims (2)

  A sheet-like material holding device that holds and conveys a sheet-like material, a sheet-like material releasing member that releases the holding of the sheet-like material by sliding contact with the sheet-like material holding device, and the sheet-like material releasing member In a sheet discharge device including a support member that is movably supported in the conveyance direction of the object and attached to the frame, a magnet that adsorbs the sheet release member so as to be in pressure contact with the support member is provided. An apparatus for discharging a sheet-like material.   2. The sheet discharging apparatus according to claim 1, wherein the magnet is embedded in the support member.

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