JPS62207648A - Printing cylinder claw stand up/down device - Google Patents

Abstract

PURPOSE:To enhance operability, by providing the linear inserted between a pawl stand bar supporting the pawl stand and the bottom surface of the notch provided to the periphery of a cylinder fixing said bar by a bolt in a freely inserting and pulling-out state. CONSTITUTION:When an impression cylinder 1 and a transfer cylinder are rotated to reverse directions to allow pawls to oppose to each other, the pawls 11 open and close with respect to a pawl stand 15 by a cam mechanism and the change-over of the biting of paper is performed between both cylinders. When paper has a standard thickness of about 0.04-0.3mm, if a cover 21 is detached and a bolt 13 is loosened, a pawl stand bar 12 is spaced apart from a bottom surface 5 by the repulsive force of a coned disc spring 18 and a gap is formed between a stopper 19 and the bottom surface 5 and a linear 24 is inserted in said gap. When a bolt 13 is tightened, the pawl stand bar 12 is fallen while the coned disc spring 18 is compressed to be fixed to the bottom surface 5. When the bolt 13 is loosed, the pawl stand bar 12 is levitated by the repulsive force of the coned disc spring 18 and, therefore, if the liner 24 is pulled out and the bolt 13 is tightened, the pawl stand bar 12 is contacted with the bottom surfaces 5 under pressure to be fixed thereto enable the correspondence to a paperboard. By this method the operability of the device is enhanced.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a printing cylinder such as an impression cylinder of a sheet-fed printing press, in which a claw base that grips the edge of paper between the claws is arranged in a manner corresponding to the thickness of the paper. This relates to a nail platform up and down device that adjusts the movement up and down.

[Conventional technology]

In addition to the plate cylinder on which the printing plate is mounted, a sheet-fed printing press is equipped with an impression cylinder that applies printing pressure between the plate cylinder or blanket cylinder during printing, and the printing paper is placed on this impression cylinder. The end of the paper is held in the gripping claw device, and printing is applied to the surface on the opposite impression cylinder side while being conveyed as the cylinder rotates.

In addition, in a multicolor printing press, a transfer cylinder is provided between the printing units of each color, and the paper is transferred between the gripping claw devices, such as from the impression cylinder to the transfer cylinder, and from the transfer cylinder to the next impression cylinder. It is conveyed from the front side and printed from the front side. The above-mentioned gripping claw device provided on these impression cylinders and transfer cylinders has a plurality of claw stands supported by a claw rest bar arranged in parallel in the axial direction of the cylinder within a notch on the outer periphery of the cylinder, and corresponds to each claw stand. The paper is gripped between the gripping surfaces of the nails and the nail base each time the nails are closed relative to the nail base.

In such a gripping claw device, generally, for example, 0.0
4. If the height of the claw base is not appropriate for the paper thickness, which varies over a wide range such as 0.6 m, the paper may become distorted when changing the grip, or the paper may not be held in the grip. If the thickness of the nail plate changes beyond a certain range, it is necessary to adjust the nail plate by moving it up and down.For this purpose, a nail plate vertical device is provided that moves the nail plate bar that supports the nail plate up and down. .

[Problem that the invention seeks to solve]

However, the conventional claw table up/down device is adjusted by rotating a plate cam or by rotating a plurality of eccentric pins, and both have complicated structures and are stupid and cannot be provided at low cost. However, there were problems such as low adjustment accuracy and poor operability.

[Means for solving problems]

In order to solve these problems, the present invention provides a liner that is inserted and removably inserted between the nail rest bar that supports the nail rest and the bottom surface of the trunk notch that fixes it with bolts. .

[Effect]

When the cylinder rotates, the paper is conveyed with the edge of the paper caught between the claws and the claw base. If the paper is thick, the nail base bar can be fixed directly to the bottom of the trunk cutout without inserting a liner, and the nail base can be lowered to accommodate thick paper. Further, when the paper is thin, by inserting a liner and fixing the claw base bar to the bottom surface of the circumferential cutout through the liner, the claw base becomes higher and can be used for thin paper. By changing the thickness of the liner, the paper thickness can be handled more appropriately.

〔Example〕

FIGS. 1 and 2 show an example in which the printing cylinder claw bed up-and-down device according to the present invention is implemented on an impression cylinder of a sheet-fed printing press, and FIG. 1 shows a part of the impression cylinder and liner in which this is implemented. FIG. 2 is an exploded plan view showing an exploded view, and FIG. 2 is an enlarged sectional view taken along line AA of FIG. 1. In these figures, a notch 2 with a circumferential angle of approximately 120° is provided on the outer circumference of the impression cylinder 1 over the entire length of the cylinder, and both end openings of this notch 20 are circular. It is blocked by a plate-shaped bearer 3. Two finished bottom surfaces 4.5 are formed in the notch 2 over the entire length of the barrel, and a plurality of brackets 6 are bolted to one of the bottom surfaces 4. T is a pawl shaft rotatably supported by the bracket 6 and the bearers 3 at both ends, and this pawl shaft 7
, a plurality of pawl holders 8 are arranged in parallel at predetermined intervals and supported via spring members, and a roller 9 is pivotally attached to the free end of the protrusion from the bearer 3 on one side. Cam lever 1
0 is pivotally mounted with the roller 9 facing a cam (not shown) on the frame side. A claw 11 is attached to the tip of each claw holder 8.
is attached, and when the impression cylinder 1 rotates, the cam lever 10 swings depending on the height of the cam surface, and all the pawl holder bases reciprocate at the same time, causing the pawls 11 to move against the pawl base 15, which will be described later. It is configured to open and close. In addition, the pressing force of the claw 11 against the claw base 15 is absorbed by the spring member provided on the claw holder 8.

On the other hand, on the other bottom surface 5, a nail rest bar 12 having a %iL-shaped cross section and slightly shorter than the total length of the notch 2 is mounted on the bottom surface 5 by inserting a plurality of bolts 13 into the bolt holes 14. The claw base bar 12 is fixed by screwing into the screw hole.
The claw base 15 formed in the shape of a top is fixed to the notch portion with a bolt in correspondence with the claw 11. Wow, there is a play between the bolt 13 and the bolt hole 14, and the nail base <-
12 is positioned in the horizontal direction by a plurality of reference pins 16 whose opposite ends are tightly fitted to the nail rest bar 12 and the bottom surface 5, respectively. A large-diameter hole 1T is formed on the bottom surface 5 side of the bolt hole 14, and a spring member is provided in the large-diameter hole 1T for biasing the claw base bar 12 in a direction away from the bottom surface 5. A plurality of countersunks 18 are interposed. Reference numeral 19 denotes a stopper having the same length as the nail rest bar 12 and having an inverted cross section so as to engage with the nail rest bar 12, and has a finished surface 19 m at both ends and the center.
A thick wall portion 19b is formed, and by screwing a bolt 20 inserted into a bolt hole in the thick wall portion 19b into a screw hole in the bottom surface 5, the finished surface 19& is brought into pressure contact with the bottom surface 5. Fixed. With this structure, when the bolt 13 is loosened, the pawl bar 12 is resiliently pushed by the disc spring 18 and rises until it still contacts the shoulder 19e of the stopper 19, allowing the insertion of liners 24 and 25, which will be described later. Bolt 13 if there is no liner 24.25 available.
When tightened, the claw base bar 12 is compressed while the disc spring 18 is compressed.
is lowered, pressed against the bottom surface 5, and fixed.

19d is a hole into which a spanner for the bolt 13 is inserted.

Further, reference numeral 21 denotes a cover for preventing dust and paper fragments from entering the area around the nail rest bar 12, and is provided over the entire length of the notch 2. 12 and the bottom surface 5. 21& is a hole into which a spanner for the bolt 13 is inserted.

Reference numeral 24 denotes a liner that is inserted and removed freely between the claw base bar 12 and the bottom surface 5, and is formed in a rectangular shape with a cross section. It is configured to be inserted between the nail rest bar 12 and the bottom surface 5 through a gap between the stopper 19 and the bottom surface 5 formed between the portions 19b. 24m is a notch that avoids the reference pin 16. Also, 25 is the same as the claw base bar 12 and the bottom surface 5.
A pair of liners that are removably inserted between the
The nail rest bar 12 and the bottom surface 5 are inserted through the gap between the stopper 19 and the bottom surface 5, which are formed on the outside of the thick wall portions 19b at both ends of the strut 19, which is formed into a rectangular shape with a cross-sectional shape and is fixed with bolts 2G. It is configured to be inserted between the Then, after inserting liner 24°25, bolt 13
When tightened, the pawl bar 12 is fixed to the bottom surface 5 via the liner 24,25. Note that when inserting the liners 24 and 25, the cover 21 is removed or at least the bolts 23 are loosened and the cover 21 is opened.

The impression cylinder 1 configured in this manner is placed in contact with a transfer cylinder (not shown) having the same diameter, for example, and is provided with a pawl 11 and a pawl base having the same configuration as the impression cylinder 1 in the notch of the transfer cylinder. A gripping claw device consisting of 15 etc. and a claw platform up/down device are provided. Note that the gripping claw device of the impression cylinder 1 and the gripping claw device of the transfer cylinder are provided with different phases in the cylinder axis direction.

With the structure described above, when the impression cylinder 1 and the hardening cylinder rotate in opposite directions and the pawls 11 face each other, the cam mechanism swings the cam mechanism 10 and the pawl 11 moves to the pawl base 15.
It opens and closes on both sides, and paper is exchanged when both sides are opened. In this case, as described above, it is necessary to adjust the movement of the claw base 15 in the perspective direction relative to the side stone, that is, in the vertical direction in FIG. 2, according to the thickness of the paper. That is, the thickness of the paper is 0.04~
If the standard thickness is about 0.3 mm, when the cover 21 is removed and the bolts 13 are loosened, the claw bar 12 is separated from the bottom surface 5 by the resilient force of the countersunk spring 18, and the shoulder of the stopper 19 is removed. When it comes into contact with the portion 19c, the upward movement is restricted.

At this time, without loosening the bolt 20 of the stopper 19,
A gap is formed between the stopper 19 and the bottom surface between the thick wall portions 19b and on the outside of the thick wall portion 19b. insert between. Then, when the bolt 13 is tightened, the disc spring 18 is compressed and the claw rest bar 12 is lowered [7] and fixed to the bottom surface 5 via the liners 24 and 25. As a result, the height of the nail stand 15 corresponds to paper of standard thickness.

If the thickness of the paper is changed from this state to a cardboard with a thickness of 0.3111 or more, for example, when the cover 21 is removed and the bolt 13 is loosened, the claw base bar 12 will be lifted up by the elastic force of the disc spring 18. Therefore, when the liners 24 and 25 are removed and the bolts 13 are tightened, the claw rest bar 12 is pressed against the bottom surface 5 and fixed, and the claw rest 15 is lowered by the thickness of the liner 24 and 25, making it suitable for cardboard. I can do it. When raising and lowering the nail rest 15 like this, the nail rest bar 12 and the bottom surface 5 are positioned by the reference pin 16, so the nail rest bar 12
Even if it moves up and down, it will not shift horizontally. In the case of this embodiment, an example was shown in which the thickness of the liner 24, 25 was set to 0.3 blade thickness to correspond to two levels of paper thickness depending on whether or not the liner was inserted. By preparing this, it is possible to deal with three or more levels of paper thickness, and the height of the nail base 15 can be set to a more appropriate height K.

Although this embodiment shows an example in which the present invention is applied to an impression cylinder of a sheet-fed printing press, the present invention can be similarly applied to any printing cylinder equipped with a gripping claw device, such as a transfer cylinder or paper feed cylinder. I can do it.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, in the printing cylinder claw rest up-down device, the claw rest bar that supports the claw rest and the bottom of the cylinder circumferential notch to which it is fixed with bolts can be freely inserted and removed. By providing a liner to be inserted into the paper, and by changing the thickness of the liner to be inserted and by changing the thickness of the liner to be inserted, the nail base can be moved up and down to correspond to the thickness of the paper. The number of points has been reduced and the structure has been simplified, making it possible to provide this product at a low cost, and all you have to do is loosen the bolts and remove and insert the liner. In addition, the height of the upper claw base can be adjusted reliably depending on the thickness of the liner.

[Brief explanation of drawings]

FIGS. 1 and 2 show an example in which the printing cylinder claw bed up-and-down device according to the present invention is implemented on an impression cylinder of a sheet-fed printing press, and FIG. 1 shows a part of the impression cylinder and liner in which this is implemented. FIG. 2 is an exploded plan view showing the expanded state, and FIG. 2 is a sectional view taken along line AA in FIG. 1. 1φ...Impression cylinder, 2 working...Notch, 5...Bottom surface,
12...-Claw base bar, 13...Φ bolt, 15...
e. Claw stand, 24.25... liner.

Claims (1)

[Claims] In a printing cylinder equipped with a claw stock bar that supports a claw stock and is fixed to a bottom surface of a trunk circumferential notch with a plurality of bolts, the printing cylinder is inserted and removably inserted between the claw stock bar and the bottom surface of a trunk circumferential notch. A printing cylinder claw stand up/down device, characterized in that it is provided with a liner.