JPS6339341A - Phase adjustment device of sheet-fed press - Google Patents

Abstract

PURPOSE:To enable quick and appropriate adjustment by providing a sliding member having a sprocket fitted along a chain-stretched side from inside and fixed axially in a direction which crosses said member at right angles and also providing a tension sprocket which is energized in the chain-stretched direction by a spring member while being fitted along a chain-slackened side. CONSTITUTION:A sliding base 15 is provided as a sliding member in such a way that it freely moves forward and backward, sliding closely on a guide rail 11 which crosses both shafts 2, 5 almost at right angles. At the lower end of the sliding base, a sprocket 18 which is set along a side in which a chain 7 is stretched from inside, is fitted in freely rotatable manner. On an upper sliding block 19, a tension sprocket 22 which is set along a side in which the chain 7 is slackened from inside is energized to a direction where the side in which the chain 7 is slackened, is made tense by a compression coil spring 24. This energizing force is so designed as to be controlled by moving forward and backward an adjusting screw 25. If an operating shaft is rotated, the sprocket 18 moves forward and backward with the sliding base 15 through engagement of a pinion 35 with a ratchet 34, and subsequently the phases of a drive shaft 2 and a driven shaft 5 are adjusted by elongation and contraction of the side in which the chain 7 is stretched.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a phase adjustment method for adjusting the mutual phase between a paper feeding device and a printing device according to the state of paper feeding to the printing device in a sheet-fed printing press. It is related to the device.

[Conventional technology]

In a sheet-fed printing press, the paper stacked on the paper stacking table is sucked one by one from the top layer by the sucker device, sent through the feeder board onto the insert plate, and then gripped by the claws of the swing device. The paper is transferred from the swing device to the print drum of the printing device, and printed while being transferred.

In such sheet-fed printing presses, the rotation of the driving side is generally transmitted to the printing device and then transmitted to the sucker device of the paper feeder or the tape for transporting paper provided on the feeder board by a chain or line shaft. However, if the rotational phase between the paper feeding device and the printing device is always fixed, for example, if the tape stretches or the tape and paper slip, the paper may not be fed to the printing device at the specified timing. ,
If the claws fail to grip the paper, or even if they do, they grip the paper poorly, leading to printing problems and accidents that require the machine to be stopped. Conventionally, in order to prevent this, a phase adjustment device was installed somewhere in the drive system between the printing device and the paper feeding device by connecting a hole and a bolt, etc., and checking the gripping condition of the claw, etc. If an abnormality is discovered, this phase adjustment device advances or delays the paper feeder for the printing device.

[Problem that the invention seeks to solve]

However, with such conventional phase adjustment devices, it cannot be operated while the machine is running, and the machine must be stopped before adjustment. This not only reduces work efficiency but also prevents the jaw from getting stuck in the jaw. Since it is not possible to make adjustments while checking the condition, it is often not possible to make appropriate adjustments in one go, and the adjustment has to be made several times, resulting in longer downtime.
! , there was a problem in that the amount of waste paper generated between the lines increased. - It has also been proposed to provide a phase adjustment device using a planetary gear mechanism in the drive system between the printing device and the paper feeding device, which can be adjusted while the machine is running, but the structure is complicated. Since it is necessary to change the distance between the windows of the trench gear, there is a drawback that the backlash of the gear increases and the phase becomes unstable.

[Failure to solve the problem]

In order to solve these problems, the present invention provides a slide member to which a sprocket attached from the inside is pivotally attached to the tension side of the chain that drives and connects the paper feeding device and the printing device. The slide member is supported so that it can move forward and backward in a direction perpendicular to the υ side, and a means for moving the sliding member forward and backward is provided on the machine frame side. A tension sprocket was installed.

[Effect]

When the prime mover is started and the drive shaft is rotated, the driven shaft is rotated by the chain drive, and the paper feeding device and the printing device rotate synchronously to supply paper to the printing device at a predetermined timing.

For example, if the paper transport tape stretches and the timing of supplying the paper to the printing device is delayed, if the operating means is operated while the machine is running to advance the slide member toward the chain tension side, the chain As the tension side becomes longer, the driven shaft rotates accordingly, and when the paper feeding device is on the driven side, the phase of the paper feeding device advances compared to before adjustment. Therefore, paper is supplied to the printing device at a predetermined timing.

In this case, the length change on the slack side of the chain, which increases by the rotation of the secondary rib shaft, is absorbed by the tension brocket.

〔Example〕

1 to 4] show an embodiment of the phase adjustment device according to the present invention, FIG. 1 is a side view of a chain drive device implementing this, and FIG. 2 is a partial expansion of FIG. 1. AA sectional view, and FIG. 3 is a partially cutaway B plan view of FIG. 1. In these figures, a drive shaft 2 on the printing device side, which is the drive side of the chain drive device 1, has a drive sub-kerat 3 attached to a frame 4.
A driven sprocket t.6 is pivotally mounted close to the frame 4 on the driven shaft 5 of the paper feeding device on the driven side. 1. A chain 7 is stretched between the driving sprocket 3 and the driven sprocket 5, and when the driving sprocket 3 rotates in the direction shown by arrow A in the figure, the driven sprocket 6 moves as shown in the figure. The chain T rotates in the direction shown by arrow B, and the chain T runs in the direction of arrow C. Therefore, the lower side of the diagram is the tension side of the chain 7,
Also, the upper side of the figure is the slack side. A tension sprocket 8.9 with a fixed shaft supported on the frame 4 side is attached to the tension side and the slack side of the chain γ in close proximity to the drive sprocket 3, respectively. And these tension sprockets 8.9. ! A phase adjustment device, which is generally designated by the reference numeral 10, is provided between the first and second terminals 6 and 6. That is, on the inner surface of the frame 4, there is a guide rail 11 that is perpendicular to the line connecting the centers of both shafts 2 and 5.
and the guide rails 12 and 13 that are divided into two and parallel to the guide rail 11 in the length direction (() are fixed with bolts 14.

15 is formed into a rectangular shape, and guide rails 11, 12°1
The slide base is a slide member that is formed to be movable forward and backward by sliding the front and back sides of the flange portion of 3 and the inner surface of the frame 4, and a short shaft 16 is fixed to the lower end of the slide base with a knock pin 17. A sprocket 18 attached to the tension side of the chain 7 from the inside is rotatably fitted onto the short shaft 16. The upper part of the slide base 15 is cut in half to form a thin part 15a, and the slide block 19 formed in a rectangular shape has the inside of this thin part 15a and the slide guide 1.
The front and back sides are in sliding contact with the flange surface of 1.12, and are supported so as to be able to move forward and backward. A short shaft 20 is fixed to the center portion of the slide block 19 in the width direction with a dowel pin 21, and a tension sprocket 22 attached to the slack side of the chain γ from the inside is rotatably fitted onto the short shaft 20. ing. Furthermore, a pair of stepped spring holes 19a are bored through the slide block 19 from above and below, and spring holes isb are also bored in the slide base 15 (III) corresponding to the spring holes 19&. There is a spring hole 19m, 1
A compression coil spring 24 is interposed between the collar of the spring shaft 23 inserted into the spring hole 15b and the bottom surface of the spring hole 15b.
The compression coil spring 24 is connected to the slide block 19 by an adjustment screw 25 screwed into the threaded portion of the spring hole 19a.
An elastic force is accumulated in the direction of separating the slide base 15 from the slide base 15. That is, the tension sprocket 22
is biased by a compression coil spring 24 in a direction to tension the slack side of the chain 7, and this biasing force is configured to be adjusted by moving an adjustment screw 25 back and forth.

26 is a stopper for the slide block 19 bolted to the upper surface of the slide base 15, and 15e is a grease groove for sliding lubrication between the slide base 15 and the frame 4.

What is generally designated by the reference numeral 27 is a drive device for advancing and retracting the slide base 15, and includes a bracket 28 that is U-shaped in plan view and is fixed to the outside of the frame 4 in correspondence with the dividing line of the guide rail 12.13. An operating shaft 30 with a knob 29 parallel to the frame 4 is rotatably supported on the bracket 28. This operation axis 3
A worm 31 is rotatably mounted on the frame 4, and a drive shaft 33, which has a worm wheel 32 at one end that meshes with the worm 31, is rotatably mounted on the frame 4. A pinion 35 that meshes with a rack 34 formed on the slide base 15 is fixed to the other end. In this way, when the operation shaft 30 is rotated, the drive shaft 33 rotates through the engagement between the worm 31 and the worm wheel 32, and the sprocket 18 moves forward and backward together with the slide base 15 through the engagement between the pinion 35 and the rack 34. 2. The structure is such that the phase between the drive shaft 2 and the driven shaft 5 is adjusted by expansion and contraction of the tension side of the chain 7. 3
6 is screwed into the screw hole of the bracket 28 to form the operating shaft 30.
This is a fixing screw with a twist that fixes the zero rotation at the adjusted position.

The operation of the phase adjustment device configured as above will be explained. The drive shaft 2 is rotated by being driven from the prime mover side, and the can body of the printing device is rotated and the claws are opened and closed. The rotation of the drive shaft 2 is transmitted to the driven shaft 5 by the chain 7, and the paper is sucked by the paper feeder and transported by the transport tape. The chain 7 has a tension sprue "1 ke soto 8,
Tension is provided by 9.22 and sprocket 18.

For example, if the supply of paper to the printing device is delayed due to slippage between the transport tape and the paper in the paper feeding device, loosen the fixing screw 36 while the machine is running, and then grasp the knob 29 and operate it. When the shaft 30 is rotated, the drive shaft 33 rotates via the worm 31 and the worm wheel 32, and the slide base 15 and sprocket 18 move downward in FIG. 1 via the pinion 35 and rack 34. Moving. In this case, the drive device 27 drives the sprocket 18
Since the force that moves the chain 7 overcomes the elasticity of the compression coil spring 24, the overall length of the chain 7 remains the same, but the tension side of the chain 7 becomes longer and the slack side becomes shorter than in the illustrated state. That is, assuming that the drive shaft 2 is stationary, the driven shaft 5 rotates slightly in the direction of arrow B, and the phase of the driven shaft 5 advances with respect to the drive shaft 2. Therefore, the phase of the paper feeding device advances with respect to the printing device, and the timing of paper feeding to the printing device, which had been delayed due to paper slippage, becomes earlier and returns to normal timing. In addition, tension sprocket 8
, 9 are fixed shafts and simply rotate at the same position. If the fixing screw 36 is tightened after phase adjustment, the phase will not change. Since the above operations can be performed while the machine is running, they can be performed while monitoring the state of paper being supplied to the printing device.

Incidentally, even if the chain 7 is elongated due to long-term use and its overall length becomes longer and the phase of the driven shaft 5 with respect to the drive shaft 2 is delayed, this can be corrected to the normal phase by the same operation. In this embodiment, an example was shown in which the tension spring rocket 22 was made to spring against the sprocket 18 by the compression coil spring 24 and was installed on a straight line perpendicular to the chain 7. It may be separated from the sprocket 18 and provided independently, for example, at the position of the tension sprocket 8.

〔Effect of the invention〕

As is clear from the above description, the present invention provides a slide member to which a sprocket is pivotally attached, which is attached from the inside to the tension side of the chain that drives and connects the paper feeding device and the printing device of a sheet-fed printing press. The slide member is supported so that it can move forward and backward in a direction perpendicular to the tension side, and a means for moving the slide member forward and backward is provided on the machine frame side, and is attached to the slack side of the chain so that the chain can be moved back and forth with a spring member. With the provision of a chain sprocket that is biased in the tension direction, if the phase between the paper feeding device and the printing device changes due to slipping between the paper and the conveying tape, stretching of the chain, etc., this can be corrected by operating the operating means. Since corrections can be made while the machine is running, productivity is improved and the amount of paper waste is reduced, and since adjustments can be made while checking the paper feeding status, quick and appropriate adjustments can be made. Further, since a planetary gear mechanism is not used as in the conventional case, the phase is stable without the influence of backlash, and the amount of adjustment is large, making it possible to respond to a wide range of phase changes.

[Brief explanation of the drawing]

1 to 3 show an embodiment of a phase adjustment device for a sheet-fed printing press according to the present invention, and FIG. 1 is a side view of a chain drive device implementing this, and FIG. 2 is a part of FIG. 1. The developed AA sectional view and FIG. 3 are partially broken B plan views of FIG. 1. 1... Chain drive device, 2... Drive shaft, 3...
...Drive sprocket, 4...Frame, 5...
... Driven shaft, 6... Driven sprocket, 7...
Chain, 10...Phase adjustment device, 11, 12.1
3--Guide rail, 15... e-slide base, 16... short shaft, 18... sprocket, 19
・・・・Slide block, 22・・・Tennyon pulley, 24・・Fist compression coil spring, 27・e−・Drive device, 30・・・Operation shaft, 31・・・Warm, 3
2- Worm wheel, 33 Drive shaft, 34
...Rack, 35...pinion. Patent applicant Komori Printing Machinery Co., Ltd. Agent Masaki Yamakawa (and 2 others) Procedural amendment stamp button

Claims (1)

[Claims] In a phase adjustment device for a sheet-fed printing press that adjusts the mutual phase in the rotational direction of a paper feeding device and a printing device that are drive-connected by a chain, a slide member is pivotally attached to a sprocket attached from the inside to the tension side of the chain. is supported so as to be freely advanced and retracted in a direction substantially orthogonal to the tension side, and a means for advancing and retracting the slide member is provided on the machine frame side,
A phase adjustment device for a sheet-fed printing press, characterized in that a tension sprocket attached to the slack side of the chain and biased in the tension direction of the chain by a spring member is provided.