JPH074455U - Sheet material reduction mechanism of sheet material discharging device - Google Patents

Abstract

(57) [Summary] [Purpose] To ensure the deceleration of discharged sheet material. A flat belt 39 having a plurality of air suction ports 39a connected to the blower 22 and traveling along a conveyance path of the paper 6 is provided. A drive pulley 31 as a suction wheel having a plurality of air suction ports 31c is provided on the downstream side of the flat belt 39 with respect to the paper sliding contact surface 39b in the paper transport direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is provided in a sheet material conveying path for conveying a sheet material such as paper, a metal plate, a plastic plate, etc. in a sheet discharge device of a sheet-fed printing press, an illegal paper detector, a punching machine, a punching machine, etc. The present invention relates to a sheet material reduction mechanism of a sheet material discharging device that reduces the conveyance speed of the sheet material and eliminates the disturbance at the time of discharging due to the running inertia of the sheet material.

[0002]

[Prior art]

 As a sheet material deceleration mechanism of this kind of sheet material discharging device, for example, one proposed by the present applicant and disclosed in Japanese Patent Laid-Open No. 62-205960 is known, and FIG. FIG. 7 is a schematic front view of the sheet discharge device of the rotary printing press, and FIG. 7 is a side view of the sheet material reduction mechanism.

In the drawing, a pair of left and right sprockets 2 are pivotally attached to the front end portions of a pair of left and right paper discharge frames 1 formed in an inverted L shape, and these sprockets 2 and a printing unit (not shown) are attached. Between the pair of left and right sprockets provided, a pair of left and right discharge chains 4 which are deflected by a sprocket 3 and a chain guide (not shown) are stretched.

A plurality of claws and claw bases are provided on a plurality of claw rods 5 which are supported by a drive device and run in a direction indicated by an arrow in the figure between left and right paper discharge chains 4 which are supported at predetermined intervals. A pair of gripper devices (hereinafter referred to as "claws") are installed side by side. By doing so, the paper after printing is configured such that the front end thereof is held by the nail as indicated by reference numeral 6 in the figure, and is conveyed by the traveling of the paper discharge chain 4.

On the other hand, below the horizontal member of the paper discharge frame 1, there is disposed a paper stacking base 7 that is moved up and down by winding and rewinding a lifting chain (not shown), and is placed on this paper stacking base 7. The paper stack plate 8 is configured so that the paper 6 released from the grip of the nail at the end of conveyance falls and is stacked. Then, the paper stacking base 7 is configured to automatically descend according to the increase in the amount of the stacked papers 6 due to the paper discharge.

[0006] The paper discharge device 9 configured as described above is provided with a paper pad 10 that abuts the front ends of the papers 6 that are dropped and stacked to align the papers 6 in the top-bottom direction, and reciprocally moves in the left-right direction of the papers 6 And a side-by-side aligning device 11 for arranging the sheets in the left-right direction are provided, and a suction device 12, which is shown in detail in an enlarged scale in FIG. Are arranged.

That is, a drive shaft 13 that is driven from the driving side and rotates in the direction indicated by the arrow in FIG. 7 is mounted between the left and right paper discharge frames 1, and behind the drive shaft 13, A hollow support shaft 14 is fixedly supported between the left and right paper discharge frames 1.

A plurality of suction / deceleration mechanisms having a drive pulley 15 mounted on the drive shaft 13 are juxtaposed on the shafts 13 and 14, respectively. The small-diameter pulley 18 pivotally mounted on the bracket 17 and the tension pulley 19 on the bracket 17 side have a small width that is driven from the drive pulley 15 side and travels at a speed slower than the conveyance speed of the paper 6. The flat belt 20 is stretched.

Reference numeral 21 denotes a box-shaped duct that is disposed between the shafts 13 and 14 with the openings facing the back surface of the flat belt 20, and that connects the hoses 23 and 24 to the blower 22 on the machine base side. The flat belt 20 has a large number of holes corresponding to the openings of the duct 21. Reference numeral 25 is a guide plate that abuts and guides the rear ends of the papers 6 that are dropped and stacked.

With this configuration, the paper 6 held by the claws of the discharge chain 4 and conveyed by the traveling of the discharge chain 4 is released from the grips of the claws at the conveying end portion and falls. . At the time of this drop, the front end of the paper 6 is aligned by the paper pad 10 and the side ends are aligned by the side-by-side aligning device 11. At this time, the paper 6 immediately before the fall is placed on the surface of the flat belt 20 at a position other than the gripping end. By being conveyed while sliding, the suction air acts and is decelerated, so that the paper 6 is strained and the paper alignment by the paper pad 10 is improved, and the paper 6 may pass over the paper pad 10. Absent.

[0011]

[Problems to be solved by the device]

 However, in such a conventional deceleration mechanism, the suction range for the paper 6 is limited only to the horizontal traveling surface of the flat belt 20, and after the paper 6 leaves the flat belt 20, suction is applied to the paper tail just before falling. There is a problem that the force does not act and a sufficient deceleration effect cannot be expected. This is a problem in a double-sided sheet-fed printing press when the width of the flat belt 20 is narrowed in an attempt to prevent the flat belt 20 from corresponding to the printing surface of the paper 6. Often gets worse.

The present invention has been made in view of the above points, and an object thereof is to provide a sheet material reduction mechanism of a sheet material discharging device having an excellent deceleration effect.

[0013]

[Means for Solving the Problems]

 In order to achieve such an object, in the present invention, the sheet material that is provided in the sheet material discharge path is slidably brought into contact with the surface of the sheet material to be conveyed, and the sheet material conveyance speed is reduced by the sheet material. The deceleration mechanism has a sliding contact surface along the sheet material discharge path and a plurality of air suction ports opening in the sliding contact surface, and is stretched so that the sliding contact surface travels in the sheet material conveying direction. The endless belt, a suction duct in which the suction opening is slidably contacted with the anti-sliding contact surface of the endless belt, and a plurality of suction ducts arranged downstream of the suction duct in the sheet material conveying direction and opened in the slidable contact surface of the sheet material. It is composed of a suction wheel that has a suction port and is driven to rotate by a drive device.

[0014]

[Action]

 The sheet material conveyed by the conveying means is conveyed while slidingly contacting the sliding contact surface of the endless belt having the air suction port, but the atmosphere is sucked from the suction port, and the endless belt is conveyed by the conveying means. Since the vehicle is traveling at a slower speed, the conveying speed of the sheet material is reduced and the sheet material is discharged in a tensioned state. In this case, even after the sheet material has passed through the suction duct, the suction force of the suction wheel acts on the sheet material immediately before being discharged, and a sufficient deceleration effect can be expected.

[0015]

【Example】

 1 to 4 show an example in which a sheet material speed reducing mechanism according to the present invention is applied to a discharge device of a sheet-fed printing press, FIG. 1 is a side view of the sheet material speed reducing mechanism, FIG. 2 is a plan view thereof, and FIG. Is a side view of the pulley, the suction wheel, and the belt stretched around these, and FIG. 4 is a side view of the suction wheel. The configuration of the entire sheet discharge device of the sheet-fed printing press is the same as that described with reference to FIG. 5 as a conventional technique, and therefore the description thereof will be omitted and thereafter, when necessary, it will be described with reference to FIG.

In the drawing, a drive shaft 30 that is driven from a driving side and rotates in a direction indicated by an arrow in the drawing supports a both end portion of the left and right paper discharge frames 1 in a conveying path of the paper 6 as a sheet material. The drive pulleys 31 constituting a plurality of sheet material reduction mechanisms are arranged on the drive shaft 30 side by side in the axial direction of the drive shaft 30.

A support shaft 32 is fixedly mounted diagonally below the drive shaft 30 with both ends thereof being supported by the left and right paper discharge frames 1. A plurality of sets of brackets 33 formed in a U shape are split and fixed to both sides of each drive pulley 31 so as to sandwich each drive pulley 31.

A driven pulley 36 is rotatably mounted on a pulley shaft 35 that is rotatably supported by the left and right brackets 33 via bearings 34, and a bolt that is planted on the inner lower end surface of the bracket 33. A tension pulley 38 with a flange, which is formed so as to be vertically movable, is rotatably supported by a bearing portion of the shaft 37. The tension pulley 38 is provided between the bracket 33 and the tension pulley 38. It is urged downward in FIG. 1 by a compression coil spring 44 which is concentrically interposed.

As described above, the three pulleys 31, 36, and 38 arranged in the inverted triangular shape are endless flat plates tensioned by the tension pulley 38 that is moved by the biasing force of the compression coil spring 44. The belt 39 is stretched by the flange of the tension pulley 38 so that its movement in the axial direction is restricted, and the flat belt 39 is provided with a plurality of suction holes 39a. The paper 6 held by the claws and conveyed by the traveling of the paper discharge chain 4 is configured to be conveyed in sliding contact with the sliding contact surface 39b of the flat belt 39.

Reference numeral 40 denotes a suction duct which is formed in a funnel shape with a bottom and is located between the driving pulley 31 and the driven pulley 36 and fixed to the left and right brackets 33. The suction duct 40 has an upper end opening opposite to the flat belt 39. An air pipe 41, which is connected to the sliding contact surface and has a hose 23 connected to the blower 22 on the machine base side shown in FIG. 5, is provided on the side surface of the suction duct 40. It is opened and connected to the inside.

When the blower 22 is operated while transporting the paper 6 in this way, the atmosphere is sucked into the suction duct 40 from the suction hole 39a, so that the paper 6 slides on the sliding contact surface 39b of the flat belt 39. When the flat belt 39 is transported at a speed lower than the transport speed of the paper 6, the transport speed of the paper 6 is reduced and a tension is applied to the paper 6.

The drive pulley 31 is fixed to the drive shaft 30 by fixing the collar 42 fixed to the boss portion 31a to the drive shaft 30, and the drive pulley 31 functions as a suction wheel. have. That is, as shown in FIG. 4, a hole 31c communicating with a plurality of radial air passages 31b opening in the peripheral surface is formed on the side surface of the drive pulley 31, and the bracket 33 has this hole. An arc-shaped elongated hole 33a communicating with 31c is provided.

An air tube 43, which is connected to the blower 22 on the machine base side shown in FIG. 5 by a hose 24, is attached to the long hole 33 a, and the blower 21 is operated while the paper 6 is being conveyed. Then, the atmosphere is sucked into the air tube 43 of the bracket 33 from the suction hole 39a through the long hole 33a and the hole 31c, so that the paper 6 runs at a speed lower than the transport speed. Since the flat belt 39 is conveyed in sliding contact with the sliding contact surface 39b, the conveying speed of the paper 6 is reduced, and the paper 6 is tensioned.

At this time, the atmosphere is also sucked from the air passage 31b of the drive pulley 31 as a suction wheel, so that the paper 6 is not only sucked to the horizontal sliding contact surface 39b of the flat belt 39, but also the horizontal sliding surface 39b. The arcuate surface 39c following the contact surface 39b is also sucked, so that the deceleration effect is improved. Since the openings of the radial air passages 31b are dished, even if the holes 39a of the flat belt 39 and the air passages 31b of the drive pulley 31 are slightly deviated from each other, suction will not be hindered.

The operation of the sheet material speed reduction mechanism configured as described above will be described with reference to FIG. The paper 6 after printing, which is held by the claws of the paper ejection chain 4 and conveyed by the traveling of the paper ejection chain 4, is released from the claws of the pawls at the end of the conveyance and falls. Are aligned with a paper pad 10 and side edges are aligned with a side aligning device 11.

In this case, since the blower 22 is operating and the atmosphere is sucked into the suction duct 40 from the suction hole 39 a through the hose 23, the air pipe 41 and the suction duct 40, the paper 6 is discharged from the flat belt 39. Since the flat belt 39 is conveyed in sliding contact with the sliding contact surface 39b and the traveling speed of the flat belt 39 is set to be slower than the conveying speed of the paper 6, the conveying speed of the paper 6 is reduced and tension is applied to the paper 6. At the same time, the running inertia is attenuated, the falling paper 6 does not hit the paper pad 10 strongly, and the front end of the paper 6 is not broken or damaged.

In this device, the drive pulley 31 has a function as a suction wheel, and the atmosphere is passed through the suction hole 39a, the air passage 31b, the hole 31c, the elongated hole 33a, the air pipe 43, and the hose 24. Since the conveyed paper 6 is sucked, the paper 6 does not separate in the tangential direction of the drive pulley 31 even when it separates from the sliding contact surface 39 a of the flat belt 39, and the peripheral surface of the drive pulley 31 does not move apart. The suction is continued as it is wound around the surface, and then the suction is released and separated from the flat belt 39, so that the deceleration is surely performed.

FIG. 5 is a side view of a sheet material speed reducing mechanism according to another embodiment of the present invention. In the figure, a plurality of members arranged in the axial direction of the drive shaft are arranged in the same manner as the above embodiment. The sheet material speed reducing mechanism 50 is provided with a flat belt 54 that is stretched in an inverted triangular shape between three pulleys 51, 52, and 53 and that is driven and driven from the drive side pulley 52 side. A plurality of suction holes are formed in the belt 54 as in the above-described embodiment.

Further, inside the flat belt 54, a duct 55 having a suction hole 55 a that is opened in contact with the back side of the running surface of the flat belt 54 is provided, and between the duct 55 and the blower 22. Are connected by an air pipe 56 and a hose.

In the present embodiment, the suction wheel, which was provided as the drive pulley 31 inside the flat belt 39 in the above embodiment, is provided outside the flat belt 54. That is, a plurality of suction wheels having a plurality of air suction holes 58a opening to the peripheral surface and the side surface are provided on the drive shaft 57 rotatably mounted on the downstream side of the flat belt 54 in the traveling direction. 58 are fixed to each flat belt 54, and disk-shaped brackets 59 are fixedly attached to both sides of the suction wheel 58 on the machine base side. The bracket 59 on one side is provided with an arcuate recessed hole 59a communicating with the blower 22 via the air tube 60 and the hose, corresponding to the suction hole 58a.

With this configuration, the paper 6 held by the claws 61 of the paper discharge chain 4 and traveling travels in sliding contact with the flat belt 54. At this time, the blower 22 is operating. Since the atmosphere is sucked into the suction duct 55 from the suction hole of the flat belt 54 through the hose, the air tube 56 and the suction duct 55, the paper 6 is conveyed while slidingly contacting the sliding surface of the flat belt 54. Since the traveling speed of 54 is set to be slower than the conveying speed of the paper 6, the conveying speed of the paper 6 is decelerated and the tension is applied to the paper 6, the traveling inertia is attenuated, and the falling paper 6 is It does not hit the paper pad 10 strongly, and the front edge of the paper 6 is not broken or damaged.

At this time, the atmosphere is also sucked from the air suction hole 58a of the suction wheel 58 rotating outside the flat belt 54 through the recessed hole 59a, the air tube 60 and the hose, so that the air is conveyed. After being separated from the sliding contact surface of the flat belt 54, the paper 6 is adsorbed on the peripheral surface of the suction wheel 58 by the air sucked from the air suction holes 58a of the suction wheel 58.

In this case, the paper 6 is not separated in the tangential direction of the suction wheel 54, but is wound around the circumferential surface of the suction wheel 54 at a certain angle so that the suction is released and then the suction is released. Since the vehicle is separated from the suction wheel 58, deceleration is surely performed.

In each of the above-described embodiments, only one drive pulley having a suction vehicle function is provided on the downstream side of the sliding contact surface of the paper 6 in the paper transport direction. You may provide more than one.

In the present embodiment, the present invention has been shown as an example in which the present invention is applied to the sheet discharge device of a sheet-fed printing machine. However, the present invention is not limited to this. For example, a sheet material such as printed paper may be printed. The same effect can be obtained by applying it to a machine that detects defective printed matter by checking the printing condition, a punching machine for sheet materials such as metal and plastic, and a punching machine.

Further, the sheet material is not limited to paper, and may be a plastic plate, a corrugated board, a metal plate, a card or the like.

[0037]

[Effect of device]

 As is apparent from the above description, according to the present invention, the sheet material conveyance speed is reduced by sliding the sheet material, which is provided in the sheet material discharge path and conveyed by the conveying means, onto the surface and sucking the sheet material. The sheet material deceleration mechanism has a sliding contact surface along the sheet material discharge path and a plurality of air suction ports opening in the sliding contact surface, and is stretched so that the sliding contact surface travels in the sheet material transport direction. An endless belt, a suction duct in which a suction opening is slidably contacted with an anti-sliding contact surface of the endless belt, and a plurality of openings arranged on the downstream side of the suction duct in the sheet material conveying direction and opened at the sliding contact surface of the sheet material. Since it is configured with a suction wheel that is equipped with a suction port and is driven to rotate by the drive device, the sheet material conveyed by the conveying means is sucked and conveyed by the running surface of the endless belt, and then the circumference of the suction wheel is further increased. Surface is sucked and Since the sucked before, emissions state where the speed reduction effect is significantly improved sheet material is improved. Especially when this sheet material speed reduction mechanism is applied to a double-sided sheet-fed printing press, a sufficient speed reduction effect can be obtained even with a small width so that the endless belt does not correspond to the printing surface, and the paper flaps and is evenly arranged. It is effective because it does not get worse.

[Brief description of drawings]

FIG. 1 is a side view of a sheet material reduction mechanism of a sheet material discharging device.

FIG. 2 is a plan view of a sheet material reduction mechanism of the sheet material discharging device.

FIG. 3 is a side view of a pulley, a suction wheel, and a belt stretched around them.

FIG. 4 is a side view of the suction wheel.

FIG. 5 is a side view of a sheet material speed reducer showing another embodiment of the present invention.

FIG. 6 is a schematic front view of a sheet discharge device of a sheet-fed printing press, which is commonly used for the description of the present invention and the description of the related art.

FIG. 7 is a side view of a conventional sheet material reduction mechanism.

[Explanation of symbols]

 6 Paper 22 Blower 23 Hose 24 Hose 31 Drive Pulley 33 Bracket 39 Flat Belt 40 Suction Duct 50 Sheet Material Speed Reducer 54 Flat Belt 55 Duct 56 Air Pipe 58 Suction Wheel 58a Suction Hole 59 Bracket 60 Air Pipe

Claims (1)

[Scope of utility model registration request] 1. A sheet material deceleration mechanism of a sheet material discharging device for reducing a sheet material conveying speed by slidably contacting a surface of a sheet material provided in a sheet material discharging path and conveyed by a conveying means to suck the sheet material. An endless belt having a sliding contact surface along the sheet material discharge path and a plurality of air suction ports opening in the sliding contact surface and stretched so that the sliding contact surface travels in the sheet material conveying direction And a suction duct in which a suction opening is in contact with the anti-sliding contact surface of this endless belt,
A sheet material provided with a plurality of suction ports arranged on the downstream side in the sheet material conveying direction with respect to the suction duct and having a plurality of suction ports opening at the sliding contact surface of the sheet material, and being rotationally driven by a drive device. Sheet material speed reduction mechanism of the discharging device.