JP2533755Y2 - Suction car equipment for sheet-fed printing press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application field] This invention attenuates the traveling inertia by sucking the paper conveyed through a paper discharge unit in a sheet-fed printing press, and eliminates paper damage at the time of paper discharge. The present invention relates to a suction wheel device for improving paper alignment.

[Conventional technology]

In the sheet-fed printing press, the paper conveyed by the claw of the conveyance chain is released from the claw grip at the conveyance end portion, falls, and is stacked on the paper stack while the front ends are aligned by the paper contact. However, the paper is transported at a high speed and is released from the grip, and collides with the paper abutment with a large running inertia, so that the paper edge is damaged and the alignment at the time of stacking is deteriorated. Therefore, conventionally, the paper discharge unit is provided with a suction wheel device provided with a suction wheel that rotates at a peripheral speed lower than the paper transport speed, and the transport paper slides on the peripheral surface of the suction wheel to suck the paper. Is used to attenuate the running inertia of paper.

[Problems to be solved by the invention]

However, in the conventional suction wheel device, in the case of thin paper, the paper is bent, so that the contact angle with the suction wheel is large, and a desired suction force can be obtained. However, since the paper does not bend and the paper almost makes line contact with the peripheral surface of the suction wheel, there is a problem that the effect of the device cannot be expected due to insufficient suction force.

[Means for solving the problem]

In order to solve such a problem, according to the present invention, a plurality of suction wheels are provided in a paper conveyance path in a direction perpendicular to the paper conveyance direction and connected to a suction air source, and In a suction wheel device of a sheet-fed printing press provided with a cover having a notch that exposes a part of an upper portion of a peripheral surface, and a bracket that integrally holds the suction wheel and the cover, the cover includes: A suction port located immediately before the paper conveying direction and between the suction wheels is opened with respect to the exposing portion, the bracket is movable in the paper conveying direction and the opposite direction, and the suction port is connected to a suction air source. And an adjusting means for adjusting the suction amount between the suction port and the suction air source.

[Action]

The paper conveyed by the conveyance chain travels while sliding on the peripheral surface of the suction wheel and is sucked to attenuate the traveling inertia. At this time, the air staying between the transport paper and the cover is sucked from the suction port opened in the cover and is forcibly exhausted, so that the transport paper is attracted to the suction wheel, and the adhesion between the suction wheel and the paper is reduced. Be certain.

〔Example〕

1 to 4 show an embodiment of a suction wheel device according to the present invention. FIG. 1 is a plan view of the suction wheel device, FIG. 2 is an enlarged plan view of an essential part of the same, FIG. 3 is III in FIG. FIG. 4 is a schematic side view of the paper ejection device embodying the present invention. In the figure, sprockets 3 and 4 are pivotally mounted on the left and right frames 2 of the sheet discharging device 1, and between these sprockets 3 and 4 and the sprocket on the printing unit side (not shown) by an arrow A in the figure. A pair of left and right paper discharge chains 5 running in the directions shown are stretched. On each of the plurality of claw rods 6 supported at fixed intervals between the left and right paper discharge chains 5, a plurality of sets of holding claw devices (hereinafter referred to as claw) each including a claw and a claw base are provided in parallel. . Then, the printed paper 7 is held by the nails and conveyed by the travel of the paper ejection chain 5, released from the claws at the end of the conveyance, and dropped and stacked on the paper stacking platform 8. . Reference numeral 9 denotes a paper pad for aligning the falling paper 7 by abutting the front end thereof, and reference numeral 10 denotes a laterally aligning plate for applying vibration to the stacked papers 7 from the side.

A suction wheel device, generally indicated by reference numeral 11, is provided in front of the transport end portion of such a paper discharge device 1. That is,
In the vicinity of the left and right frames 2, a pair of left and right screw shafts 12 is provided.
The left and right screw shafts 12 are rotatably connected to the transmission shaft 14 and the bevel gears 15 and 16 which are orthogonal to the screw shafts 12 by being supported by front and rear brackets 13 parallel to the frame 2 and rotatably provided. . A screw hole of a bracket 17 is screwed into a screw portion of each screw shaft 12. Between the left and right brackets 17,
An air pipe 18 connected to a suction air source is supported. A suction axle 19 parallel to the air pipe 18 is rotatably supported by the left and right brackets 17, and is driven to rotate in a direction indicated by an arrow in FIG. 3 by a driving device (not shown). A plurality of brackets 20 rotatably supporting the suction axle 19 and fixedly fastened to the air pipe 18 are arranged in parallel between the left and right brackets 17. On the suction axle 19, a plurality of suction wheels 21 having a plurality of slits 21a on the outer peripheral portion are fixed adjacent to each bracket 20, and the slit 21a of each suction wheel 21 and the air pipe 18 are: It is communicated by the suction air passage 22. By doing so, the paper 7 conveyed by the paper discharge chain 5 is
When the vehicle travels in sliding contact with the peripheral surface of the air intake 21, the suction air from the suction air source flows through the air pipe 18, the suction air passage 22, and the slit.
It acts on the paper 7 via 21a, and the paper 7 is sucked by the suction wheel 21 so that the running inertia is reduced.

Reference numeral 23 denotes a cover formed of a plate material and extending in the machine width direction. The cover 23 is screwed to the upper surface of the bracket 20 to block the paper 7 to be conveyed from the suction axle 19 and the air pipe. Each suction wheel 21 covers the upper part of its peripheral surface 23
It is exposed from the notch 23a.

Above the suction axle 19, a plurality of holes 23b formed in a square shape and having a chamfered periphery are formed in the cover 23 in parallel in the axial direction of the suction axle 19, and the cover 23 and each bracket 20 are formed. Suction packing 24 fits with hole 23
It is inserted at a location other than b and is screwed together with the cover 23. In the bracket 20, a suction air passage 26 having a suction port 25 opening to the center of the hole 23b is formed obliquely so as to communicate the air pipe 18 with the outside.
Thus, when the suction air source is started, the suction wheel 21 is started.
At the same time, air staying between the paper 7 and the cover 23 is sucked from the suction port 25, and the suction air passage
The air is exhausted through the air pipe 26 and the air pipe 18. Further, an adjustment bolt 27 is screwed into the screw hole provided in the bracket 20 so as to be able to move forward and backward. By rotating the adjusting bolt 27 and moving forward and backward, the cross-sectional area of the suction air passage 26 is enlarged and reduced, so that the suction air is reduced. It is configured such that the amount of exhaust gas passing through the passage 26 is adjusted. Numeral 28 is a nut which is screwed to the adjusting bolt 27 and fixes it at the adjusting position. Also, 29
Is a sheet-flow-preventing plate for board removal, which is pivotally mounted on a lever 30 pivotally supported by the bracket 20.

The entire suction wheel device 11 configured as described above is configured to move and adjust in the vertical direction of the paper 7 according to the paper size. That is, by rotating one of the screw shafts 12, the left and right gear shafts 12 drivingly connected by the bevel gears 16 and 15 and the transmission shaft 14 rotate in synchronization, and the entire suction wheel device 11 is rotated by a screw action. Is configured to move to correspond to the paper size. 31 is one end fixed to the cover 23 and the transport paper 7
And a plurality of guide tapes, which are attached to the transmission shaft 14 and hung, and a weight is hung at the lower end thereof. By doing so, when the cover 23 moves together with the suction wheel 21 or the like corresponding to the paper size, the tape
31 is configured to expand and contract while maintaining tension. Reference numeral 32 denotes an air vent hole for venting air that is to stay between the transport paper 7 and the cover 23.

The operation of the suction wheel device configured as described above will be described. After printing, the paper 7 held by the pawls of the paper discharge chain 5 and conveyed by the travel of the paper discharge chain 5 is released from the grip of the pawl at the conveyance end portion, falls, and collides with the paper pad 9, thereby leading to the front end. Are stacked on the paper stacking platform 8 while the At the time of loading, vibration is applied to the side end by the horizontal shift plate 10 so that the horizontal alignment is performed.

When the paper 7 is conveyed and stacked, the portion other than the gripping end of the paper 7 is conveyed while sliding on the peripheral surface of the suction wheel 21 at the conveyance end portion. At this time, the suction air from the suction air source is removed. The paper 7 acts on the paper 7 via the air pipe 18, the suction air passage 22 and the slit 21 a, so that the paper 7 is attracted to the peripheral surface of the suction wheel 21 and its running inertia is attenuated. As a result, even when the paper 7 collides with the paper pad 9 as described above, the paper 7 is decelerated and is not damaged, so that the front end of the paper is well aligned. Further, in this apparatus, a suction port 25 is opened in the cover 23, and suction air from a suction air source acts between the cover 23 and the transport paper 7 through the air pipe 18, the suction air passage 26 and the suction port 25. Since the air staying in this portion is sucked and forcibly exhausted, the paper 7 is attracted to the suction wheel 21 and the paper 7 is securely adhered to the suction wheel 21. FIG. 3 shows the case where the paper 7 is thin. If the thickness of the paper 7 is changed to thick paper from this state, the adjustment air screw 27 is loosened and pulled out from the screw hole, and the suction air passage 26 is removed. Since the cross-sectional area becomes larger and the amount of exhaust increases, it is possible to handle thick paper, and in this way, an optimal amount of exhaust corresponding to the thickness of the paper is obtained.

When the paper size changes, when one of the screw shafts 12 is rotated, the other gear shaft is rotated synchronously via the bevel gears 15, 16 and the transmission shaft 14, so that the suction wheel is actuated by the screw action. The entire device 11 moves in the vertical direction of the paper 7 to correspond to the paper size. At this time, the plurality of guide tapes 31 whose one ends are fixed to the cover 23 expand and contract while maintaining the tension state, and the guide function of the paper 7 is held.

If a brush is planted around the suction port 25, the flow of exhaust gas can be ensured, and excessive deceleration of the paper 7 due to too strong suction can be eliminated. Also suction air passage
By connecting a relief valve to 26, excessive pressure reduction can also be prevented.

[Effect of the invention]

As is apparent from the above description, according to the present invention, in the suction wheel device of the sheet-fed printing press, the cover is located immediately before the exposed portion of the suction wheel in the paper conveying direction and between the suction wheels. With the opening of the suction port, the suction port is very close to the suction wheel in the paper transport direction, so when the paper is sucked by the suction wheel, the air remaining between the transport paper and the cover near the suction wheel is sucked. The paper is sucked from the mouth and is forcibly evacuated, and the transport paper is attracted to the suction wheel side, so that the paper adheres firmly to the suction wheel, the paper decelerates reliably, and the paper is strongly hit by the paper contact. Scratches are eliminated and the alignment of the paper is improved.

In addition, the bracket that integrally holds the suction wheel and the cover can be moved in the paper transport direction and in the opposite direction, so that the paper size can be changed, and the suction port is integrated even if the suction wheel is moved. Since the position of the paper does not change, the positional relationship between the paper and the suction port does not change, so that the paper is always in close contact with the suction wheel, and stable paper contact is obtained.

Furthermore, by connecting the suction port to the suction air source and providing an adjusting means for adjusting the suction amount between the suction port and the suction air source, the suction amount can be selected according to the thickness of the paper. As a result, an optimal suction amount corresponding to the paper thickness can be obtained.

[Brief description of the drawings]

1 to 4 show an embodiment of a suction wheel device of a sheet-fed printing press according to the present invention, FIG. 1 is a plan view thereof, FIG. 2 is an enlarged plan view of a main part of the same, and FIG. FIG. 2 is a cross-sectional view taken along line III-III of FIG. 2, and FIG. 7 ... Paper, 11 ... Suction car device, 18 ... Air pipe, 19 ...
… Suction axle, 20… Bracket, 21 …… Suction wheel, 23 ……
Cover, 23a ... Notch, 25 ... Suction port, 26 ... Suction air passage.

Claims (1)

(57) [Scope of request for utility model registration] 1. A plurality of suction wheels disposed in a paper conveyance path in a direction orthogonal to a paper conveyance direction and connected to a suction air source, and a part of an upper portion of a peripheral surface of the suction wheel is exposed. In a suction wheel device of a sheet-fed printing press provided with a cover having a notch to be cut and a bracket for integrally holding the suction wheel and the cover, the cover transports paper to an exposed portion of the suction wheel. A suction port located immediately before the direction and between the suction wheels is opened, and the bracket is movable in the paper conveyance direction and the opposite direction, and the suction port is communicated with a suction air source. A suction wheel device for a sheet-fed printing press, comprising an adjusting means for adjusting a suction amount between the suction air source and the suction air source.