JPH0242681Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a sheet-fed printing machine in which the paper fed onto the feeder board by the paper feed roller of the paper feeding device is registered in the left-right direction between the feeder board and the insert plate. This paper relates to a paper feeding conveyance table that conveys the paper while aligning the sheets.

[Conventional technology]

Between the paper feeding device and the printing unit of a sheet-fed rotary printing press, there is a plurality of conveyor tapes that are stretched over a feeder board and conveys the paper, a difference plate that allows the conveyed paper to slide, and this difference plate. A register device is provided at the leading end of the paper for aligning the register of the paper in the vertical direction, and a swing device for supplying the registered paper to the printing unit. The feeder board and the difference plate are connected by a conveyance table commonly called a dobuta board, and horizontal stitching devices are provided on both sides of this conveyance table to align the register of the paper in the left and right direction.

Of the above-mentioned conveyance tables, the overall width must be expanded or contracted in accordance with the paper size in order to move the horizontal stitching device when the paper size changes. Conventionally, the entire conveyor table was divided into several parts in the width direction of the paper, and the center part was made fixed, and several parts on both sides were made removable, and each time the paper size was changed, the required number of parts could be attached and detached. It is configured to accommodate movement of the horizontal needle device according to size.

However, the conventional attachment/detachment structure for the conveyor table is to superimpose multiple pairs of front and rear leaf springs perpendicular to the back side of the conveyor plate, and the stay for supporting the horizontal needle device extending below the conveyor plate is attached to the plate springs. Since it was constructed so that it was sandwiched from the front and back, various problems occurred.

In other words, if the spring force of this leaf spring is weak, the machine will not only rattle and make noise during operation, but also cause the conveyor plate to lift due to this vibration, causing the paper to swell from the back side. This sometimes caused printing problems. Additionally, if the spring force of the leaf spring is increased to avoid this, it will be difficult to remove the conveyor plate, the leaf spring may be damaged due to forceful removal, and the spring force may be attenuated by repeated attachment and detachment. There was a problem.

Therefore, the applicant of the present invention has filed and published a paper feed conveyance table in Japanese Utility Model Application No. 155375/1983 which eliminates such problems, and this will be explained based on FIGS. 4 and 5. Figure 4 is a schematic side view showing a part of a multicolor sheet-fed printing press that implements this paper feed conveyance table;
The figure is a perspective view of a paper feed conveyance platform, and the printing machine is equipped with a paper feed device 1 and multiple sets of printing units 2 (only one set is shown). It is equipped with a paper stacking table 4 that rises as the weight decreases due to paper feeding, and a suction device (not shown) that sucks the stacked papers 3 one by one from the upper layer and sends them between a pair of upper and lower paper feed rollers 5 and 6. The printing unit 2 also applies printing pressure to the paper 3 passing between a plate cylinder 7 to which a printing plate is mounted on the circumference, a blanket cylinder 8 to which an image formed on the plate is transferred, and the blanket cylinder 8. A paper transfer cylinder 10 is provided between the impression cylinders 9 of adjacent printing units 2 to transfer the paper 3 therebetween.

Between the paper feed rollers 5 and 6 and the front end of the printing unit 2, a feeder board 11 made of real board material and slightly wider than the maximum paper size is installed with a slight inclination. Between a pair of front and rear rollers 12 and 13 rotatably mounted on shafts near the section, a plurality of conveyor tapes 14 are arranged in parallel in the width direction of the feeder board 11 and are stretched with the upper running section attached to the feeder board 11. It is suspended. 15 is fixed to the body side and rollers 12, 13
This is a small frame that supports the feeder board 11 and the feeder board 11. In front of the small frame 15, a difference plate 16 having approximately the same width as the feeder board 11 is installed in front of the small frame 15.
It is installed at a predetermined distance from the front end of the feeder board 11 at substantially the same inclination angle as the feeder board 11, and the front end thereof is provided with a vertical registration device consisting of a front stop 17 and the like. What is indicated by the symbol 18 is
This is a swing device that swings the paper 3 that has stopped in contact with the front stopper 17 in its grip, and causes the pawl of the impression cylinder 9 to change the grip to the grip. Above the feeder board 11, a paper pressing roller for pressing the paper 3 against the conveyance tape 14 is provided, but illustration thereof is omitted.

A stay 19 is supported between the small frame 15 and the difference plate 16 with both ends fixed to the left and right frames 20, and the paper 3 to be conveyed is attached to both ends of the stay 19.
Conventionally well-known horizontal needle device 2 for aligning the left and right registers of
1 is attached so as to be movable and adjustable in the width direction of the machine. On the stay 19, one conveyance plate 23 and a plurality of conveyance plates 24, which together with the stay 19 constitute a conveyance table, are arranged in parallel in the width direction of the paper 3.
Among them, the central conveying plate 24 is formed to be slightly wider than the expected minimum paper size, and is screwed to the stay 19. Moreover, the plurality of conveyance plates 24 are
The number is selected according to the size of paper 3,
It is configured to be attached to and detached from the stay 19. Although the attachment of the conveyance plate 24 to the stay 19 is not shown, the conveyance plate 24 is attracted by a rubber magnet embedded in the stay 19 and its movement is restricted, and the metal fittings on the back side of the conveyance plate 24 are brought into contact with the stay 19. Movement in the front-rear direction is restricted by causing the front end of the conveying plate 24 to engage with the stepped portion of the difference plate 16.

With the above configuration, the paper 3 stacked on the paper stacking table 4 is sucked one by one by the suction device and sent forward, and the paper 3 is rotated vertically in opposition to each other. After being caught by the feed rollers 5 and 6 and sent out onto the conveyance tape 14, it is conveyed by the conveyance tape 14. The conveyed paper 3 is released from the conveyance tape 14 at the position of the roller 12, sent out onto the conveyance plates 23 and 24, and as it slides, the right and left registers are adjusted by the horizontal needle device 21,
It is sent out on the difference plate 16 and slides on the difference plate 16 until it comes into contact with the front stop 17. This paper 3 is registered in the vertical direction by the front guard 17, and when it stops, it is held in the swing device 18, and after this,
Printing is carried out while being held in the grip of the impression cylinder 9 and conveyed.

For example, if the paper size is changed from the maximum paper size to a narrower paper, one by one, one of the six transport plates 24 at both ends is removed, and the horizontal stitching devices 21 on both sides are removed. Move toward the center by the required dimension. In this way, as the size of the paper 3 becomes smaller, the conveyor plates 24 are removed one by one from the outside, and in the case of the smallest paper, only the fixed conveyor plate 23 is left.

[Problem that the invention attempts to solve]

However, in the conventional paper feed conveyance table configured in this way, the conveyance plate 24 is attracted by a rubber magnet, so although it is easy to attach and detach without generating noise, the conveyance plate 24 is still attached each time the paper size is changed. Since you have to remove or add
Not only is the work cumbersome and requires effort and time, but
Since the lower part of the conveyed paper 3 is completely covered by the conveyor plates 23 and 24, there is no place for the air that has entered between the paper 3 and the conveyor plates 23 and 24 to escape, causing the paper 3 to swell and make printing difficult. I had a problem with going crazy.

[Means for solving problems]

In order to solve such problems, in the present invention, the paper feed conveyance table disposed in the space between the paper feed conveyance tape and the difference plate is provided with a stay extending in the width direction of the machine within the space; A pair of supports for the lateral register device are supported at both ends of the stay so as to be movable and adjustable in the machine width direction, and an insertion hole through which the stays are inserted is bored, and the machine follows the movement of the supports. It is composed of a plurality of paper receiving members formed by bending an elastic thin plate material so as to elastically deform and expand/contract in the width direction.

[Effect]

With this configuration, the paper conveyed by the conveyance tape is fed onto the difference plate after passing over the parallel paper receiving members, and when passing through the paper receiving members, the left and right registers are aligned by the lateral register device. When the size of the paper changes from a large one to a smaller one, moving the horizontal registration device along with the support base inward to match the width of the paper will remove the multiple pieces of paper sandwiched between the support bases on both sides. The receiving member is compressed against elasticity to accommodate narrow paper. Also, when the size of the paper changes from a narrow one to a wider one, by moving the support base outward to match the width of the paper, the paper receiving member will expand due to its own elasticity to accommodate the wider paper. . And since the paper receiving member is hollow U-shaped,
Even if air gets between it and the paper being conveyed over it,
This air passes through the paper receiving member downward and escapes, and does not accumulate between the paper and the paper.

〔Example〕

1 to 3 show an embodiment of the paper feeding conveyance table according to the present invention, FIG. 1 is a plan view of the end thereof, FIG. 2 is a perspective view of the paper receiving member, and FIG. 3 is a paper receiving member. FIG. 2 is a plan view corresponding to FIG. 1 showing the member in a contracted state;
The entire configuration of the printing press except for the paper feed conveyance table is the same as that of the conventional printer shown in FIGS. 1 and 2, so a detailed explanation thereof will be omitted and a brief explanation will be given below using the same figures. A feeder board 11 and a plurality of conveyor tapes 14 arranged in parallel in the width direction of the machine are disposed on a small frame 15 supported between the paper feeder 1 and the printing unit 2. The paper 3 fed onto the feeder board 11 by the upper and lower paper feed rollers 5 and 6 is conveyed by the conveyance tape 14, and then onto the differential plate 16 disposed through a space between it and the conveyance tape 14. sent.

In the space between the conveying tape 14 and the difference plate 16, a pair of front and rear stays 3 having a rectangular cross section is provided.
0 and 31 are supported between the left and right frames 20 perpendicular to the conveying direction of the paper 3, and a pair of left and right support stands 32 are provided at both ends of the space in the machine width direction.
0 and 31 so as to be movably adjustable. A horizontal needle device 21 as a horizontal register device having the same configuration as the conventional device shown in FIG. . Left and right horizontal needle device 21
are not used at the same time, and in the case of normal front printing, the one shown on the left side when viewed from the paper feeding direction is used, and when the paper after front printing is turned over and the back printing is applied to it, the one shown on the left side is used. The opposite side is used, and the structure and operation of the horizontal needle device will now be explained in more detail. On the support stand 32, there is a horizontally long prismatic gauge 33 and both end edges 3 on which the paper 3 enters.
A roller arm 36 is screwed to a cam lever 35 whose cam levers 4a and 34b are swingably supported on the support stand 32 side. A presser roller 37 is rotatably supported on the swinging end side of the roller arm 36 with its lower end inserted into a square hole provided in the presser plate 34.
A paper receiving roller (not shown) is disposed below the presser roller 37 so that its circumferential surface faces the presser roller 37. Then, the roller arm 36 and the cam lever 3
5 is engaged with a cam and a spring member (not shown), and the presser roller 37 moves up and down at a predetermined period so as to be brought into pressure contact with and away from the paper receiving roller, and the paper receiving roller is driven by a drive device and is configured to rotate back and forth alternately by a predetermined angle in the forward and reverse directions at the same period as the up and down movement of the presser roller 37. 38 is a screw member for adjusting the pressure contact force of the presser roller 37, and 39 is a screw member for adjusting the pressing force of the presser roller 37;
This is an adjustment mechanism that finely adjusts the position of the entire device 1 in the left-right direction. With this configuration, when the paper 3 is conveyed and the paper end enters the presser plate 34 from the edge 34b side, the paper receiving roller moves in the paper feeding direction when the presser roller 37 is raised. When the presser roller 37 is facing downward, the paper receiving roller rotates counterclockwise when viewed from above, and as a result, the paper edge is held between the presser roller 37 and the paper receiving roller. The paper is pressed against the gauge 33, the edges of the paper are aligned, and the register in the left and right direction is aligned. When the width of the paper 3 becomes narrow, the horizontal needle devices 21 on both sides
along with the support stand 32, to the center of the machine base, and if it becomes significantly large, move it to the outside of the machine base.

A plurality of paper receiving members 40 are disposed between the support stands 32 on both sides that support the left and right horizontal needle devices 21 configured as described above. The paper receiving member 40 is made of an elastic thin steel plate or synthetic resin plate, and is formed into a substantially U-shape in plan view, and rectangular holes 40a are formed in both legs of the paper receiving member 40.
a are fitted into the stays 30 and 31 and are closely aligned in the width direction of the machine. Then, each paper receiving member 4
0 is set so that when the support base 32 is expanded outward to fit the largest paper, a slight elasticity is accumulated and the support base 32 is brought into close contact with each other. As they move toward the center, they are elastically deformed as shown in FIG. 3, and the widths are reduced so that they come into close contact with each other.

With the above configuration, the paper 3 stacked on the paper stacking table 4 is sucked one by one by the suction device and sent forward, and the paper 3 is rotated vertically in opposition to each other. After being captured by the feed rollers 5 and 6 and sent out on the transport tape 14, the paper is transported by the transport tape 14. The transported paper 3 is released from the transport tape 14 at the position of the roller 12, and
The paper 3 is sent out onto the paper receiving member 40 and slides thereon, but at this time, the end of the paper 3 enters the presser plate 34 of the horizontal stitching device 21 from the edge 34b side, and the presser roller 37 Since the vertical movement of the roller and the reciprocating rotation of the paper receiving roller are repeated in the same period, the paper edge is drawn in by the upper and lower rollers and pressed against the gauge 33, so that the left and right registers are aligned and the difference plate is moved. 16 is sent to the top. The paper 3 is registered in the vertical direction by the front plate 17, and when it stops, it is gripped by the swing device 18, and then the impression cylinder 9
Printing is carried out while being held in the claws of the printer.

Air often enters the downward direction of the paper 3 that is conveyed while sliding on the paper receiving member 40 as described above, but air may enter the paper 3 itself and the V-shaped portion between the adjacent paper receiving members 40. Since the opening is completely opened in the vertical direction, air that has entered below the paper 3 escapes downward and does not accumulate under the paper 3 and cause the paper 3 to swell.

Now, for example, if the specification of the printing paper is changed from the largest paper to a paper with a smaller width, the support stands 32 on both sides should be moved toward the center of the machine stand to make rough adjustments corresponding to the paper width. Thereafter, the position of the gauge 33 of the horizontal needle device 21 is finely adjusted by the adjustment mechanism 39. When the support base 32 is moved in order to adjust the position of the cross needle device 21 in this way, all the paper receiving members 40 follow this movement and slide on the stays 30 and 31 as shown in FIG. However, it deforms elastically and its width shrinks. Even if the width of the paper receiving member 40 is reduced, the height does not change and the function of sliding the paper 3 does not change. In addition, when the specification of the paper 3 is changed from a narrow one to a wide one, when the support stand 32 is moved outward to position the horizontal stitching device 21, all the paper holders follow this. The width of the member 40 expands and maintains a close contact due to its elasticity.

In this way, the paper receiving member 40 expands and contracts in accordance with the movement of the horizontal needle device 21, so that the paper receiving member 40 expands and contracts in accordance with the movement of the horizontal needle device 21.
4 etc. each time the paper width is changed, and since the overall width of the paper receiving member 40 can be adjusted steplessly, the position of the horizontal needle device 21 can be easily adjusted. Further, since the paper receiving members 40 are always in close contact with each other, no noise is generated.

In this embodiment, when changing the width of printing paper, the horizontal needle devices on both sides are moved based on the center of the paper width, but depending on the model, the paper width may be changed based on one side of the paper. Therefore, in this case, only the horizontal needle device on the non-use side needs to be moved.

[Effect of idea]

As is clear from the above description, according to the present invention, in the paper feed conveyance table of a sheet-fed printing press, the paper feed conveyance table disposed in the space between the paper feed conveyance tape and the difference plate, A stay extending in the machine width direction within the space, a pair of lateral orientation supports supported at both ends of the stay so as to be movable and adjustable in the machine width direction, and an insertion hole through which the stay is inserted are bored. A space in which the paper receiving members are arranged in parallel is formed by a plurality of paper receiving members formed by bending an elastic thin plate material so as to elastically deform and expand/contract in the width direction of the machine following the movement of the support base. The upper and lower parts communicate with each other,
Even if air gets under the conveyed paper, this air escapes downward, so the paper does not swell and good printing registration is maintained.The paper receiving members are always elastic and in close contact with each other, so it is quiet. Operation is possible and the working environment is improved. Additionally, since there is no need to attach or detach the paper receiving member to the device every time the width of the printing paper is changed, labor and print preparation time can be reduced, and the width of the entire paper receiving member can be eliminated. Since it can be adjusted in stages, the position of the horizontal needle device can be easily adjusted, improving work efficiency.

[Brief explanation of drawings]

1 to 3 show an embodiment of the paper feed conveyance table for a sheet-fed printing press according to the present invention, FIG. 1 is a plan view of the end thereof, FIG. 2 is a perspective view of the paper receiving member, and FIG. FIG. 3 is a plan view showing a state in which the paper receiving member is contracted, corresponding to FIG. 1, and FIG. 4 is a partially schematic side view of the multicolor sheet-fed printing press, shown for explaining the position of the paper feed conveyance table, etc. , FIG. 5 is a perspective view of a paper feed conveyance table of a conventional sheet-fed printing press. 1...Paper feeding device, 3...Paper, 14...Transport tape, 16...Difference plate, 21...Horizontal needle device, 30,3
1... Stay, 32... Support stand, 40... Paper receiving member.

Claims (1)

[Scope of utility model registration request] A paper feed conveyance table for a sheet-fed printing machine, which is disposed in a space between a plurality of conveyance tapes for conveying paper sent out from a paper feed device and a differential plate on the downstream side in the conveyance direction, the A stay supported in a space perpendicular to the paper conveyance direction, a pair of support stands supported at both ends of the stay so as to be movable and adjustable in the width direction of the machine, and each supporting a paper lateral registration device; A plurality of paper receiving members arranged between the stands are provided,
This paper support member has an insertion hole through which the stay is inserted, is supported by the stay, and is made of an elastic thin plate material so that it elastically deforms and expands and contracts in the width direction of the machine following the movement of the support base. A paper feed conveyance table for a sheet-fed printing press, characterized in that it is formed by bending.