JPH0815786B2 - Phase adjustment device for sheet-fed printing press - Google Patents

Description

The present invention relates to a phase adjusting device for adjusting a mutual phase of a sheet feeding device and a printing device in a sheet-fed printing press according to a feeding state of the printing device. It is a thing.

[Conventional technology]

In the sheet-fed printing press, the paper stacked on the paper stack is sucked one by one from the upper one by the sucker, sent out onto the difference plate through the feeder board, and then held by the claws of the swing device. Then, printing is performed while being transported while being transported from the claw of the swing device to the claw of the printing cylinder of the printing device.

In such a sheet-fed printing press, generally, the rotation on the driving side is transmitted to a printing device and then transmitted to a sucker device of a paper feeding device or a tape for carrying paper provided on a feeder board by a chain or a line shaft. However, if the rotation phase of the paper feeding device and the printing device is always fixed and fixed,
For example, when the tape is stretched or the tape and the paper slip, the paper is not supplied to the printing device at a predetermined timing, and the nail may not grip the paper or the grip may be shallow even if the paper is caught. Or, an accident occurs in which the machine must be stopped. Therefore, in order to prevent this, conventionally, a phase adjusting device is provided somewhere in the drive system between the printing device and the paper feeding device by connecting a long hole and a bolt, etc. When an abnormality is found, the phase adjusting device is used to advance or delay the phase in the rotation direction of the sheet feeding device with respect to the phase in the rotation direction of the printing device.

[Problems to be solved by the invention]

However, such a conventional phase adjusting device cannot be operated during the operation of the machine and must be adjusted by stopping the machine without fail, which not only lowers the work efficiency but also holds the jaws. Since it is not possible to make an adjustment while looking at the condition, it is often impossible to make an appropriate adjustment once, and the adjustment will have to be redone several times, further increasing the idle time and increasing the amount of waste paper generated during that period. There was a problem of doing. On the other hand, it is also proposed to provide a phase adjusting device using a planetary gear mechanism in the drive system between the printing device and the paper feeding device as one that can be adjusted during the operation of the machine, but the structure is complicated, Further, since the center distance of the gear has to be changed, there is a drawback that the backlash of the gear increases and the phase becomes unstable.

[Means for solving problems]

In order to solve such a problem, the present invention provides a phase adjusting device for a sheet-fed printing press, which adjusts the phases of a driven device side sprocket and a feeding device driven side sprocket drivingly connected by a chain. Providing a sprocket and a tension sprocket that are attached from the inside to the tension side and the slack side of the chain between the paper device driven side sprocket and the printing device driving side sprocket,
A moving member that rotatably supports a sprocket that abuts on the tension side, and a support member that rotatably supports a tension sprocket that abuts on the slack side in a frame of the sheet-fed printing press in a tension direction of the chain. A moving operation means is provided which is slidably held and a compression spring is interposed between the moving member and the supporting member to move and adjust the sprocket in a direction in which the length of the chain on the tension side changes. It was

[Action]

When the prime mover is started and the drive shaft is rotated, the driven shaft is rotated by the chain drive, the paper feeding device and the printing device are synchronously rotated, and the paper is supplied to the printing device at a predetermined timing. Then, for example, when the paper feeding tape is stretched and the timing of feeding the paper to the printing apparatus is delayed, the operating means is operated while the machine is operating to move the moving member forward in the chain tension side direction. When the tension side becomes longer and the driven shaft rotates by that amount, and when the paper feeding device is on the driven side, the phase of the paper feeding device leads the phase before adjustment. Therefore, the paper is supplied to the printing device at a predetermined timing. In this case, the change in length on the slack side of the chain, which is shortened by the rotation of the driven shaft, is absorbed by the tension sprocket.

〔Example〕

1 to 3 show an embodiment of a phase adjusting device according to the present invention. FIG. 1 is a side view of a chain drive device implementing this, and FIG. 2 is a partially expanded AA cross-sectional view of FIG. 3 is a partially cutaway plan view B of FIG. In these figures, a drive sprocket 3 is mounted on a drive shaft 2 on the side of the printing device, which is the drive side of the chain drive device 1, in the vicinity of the frame 4, and the driven side of the paper feeding device on the driven side. A driven sprocket 6 is mounted on the shaft 5 in the vicinity of the frame 4. A chain 7 is stretched between the drive sprocket 3 and the driven sprocket 5, and when the drive sprocket 3 rotates in the direction indicated by arrow A in the figure, the driven sprocket 6 moves in the direction indicated by arrow B in the figure. And the chain 7 travels in the direction of arrow C. Therefore, the lower side of the chain 7 is the tension side, and the upper side of the figure is the slack side. On the tension side and the slack side of the chain 7, axially fixed tension sprockets 8 and 9 supported on the frame 4 side are respectively attached in close proximity to the drive sprocket 3. And, between the tension sprockets 8 and 9 and the driven sprocket 6, reference numeral 1 is used as a whole.
A phase adjuster indicated by 0 is provided. That is, on the inner surface of the frame 4, a guide rail 11 that is substantially orthogonal to a line connecting the centers of both shafts 2 and 5 and guide rails 12 and 13 that are divided into two in the length direction and that are parallel to the guide rail 11 are provided. Bolt 1
Fixed at 4. Reference numeral 15 denotes a slide base as a moving member which is formed in a strip shape and is configured to move forward and backward by sliding the front and back sides of the flange portions of the guide rails 11, 12, 13 and the inner surface of the frame 4 at the lower end portion thereof. Has a short shaft 16 fixed by a knock pin 17, and the short shaft 16 has a chain 7
A sprocket 18 that is attached to the tension side of the shaft from the inside is rotatably fitted. In addition, the upper part of the slide base 15
The thin portion 15a is formed by cutting the thickness in half,
The slide block 19 as a support member formed in a rectangular shape includes the inner surface of the thin portion 15a and the slide guide 1
The front and back are in sliding contact with the flange surfaces of 1 and 12, and are supported so that they can move back and forth. In the widthwise central part of the slide block 19,
A short shaft 20 is fixed by a knock pin 21, and a tension sprocket 22 is attached to the short shaft 20 so as to be attached to the slack side of the chain 7 from the inside so as to be rotatable. Further, the slide block 19 has a pair of stepped spring holes 19a.
Are pierced through the top and bottom, and a spring hole 15b is also formed on the slide base 15 side so as to correspond to the spring hole 19a. A compression coil spring 24 is interposed between the flange of the spring shaft 23 inserted into the spring holes 19a and 15b and the bottom surface of the spring hole 15b. The slide block 19 can be
Repulsive force is accumulated in the direction of separating the slide base 15 from the slide base 15. That is, the tension sprocket 22 is urged by the compression coil spring 24 in the direction in which the slack side of the chain 7 is tensioned, and the urging force is adjusted by advancing and retracting the adjusting screw 25. 26 is a stopper for the slide block 19 bolted to the upper surface of the slide base 15, and 15c is a slide base 1
5 is a grease groove for sliding lubrication between the frame 5 and the frame 4.

Reference numeral 27 denotes a drive device for moving the slide base 15 forward and backward, and includes a bracket 28 having a U-shape in a plan view, which is fixed to the outer side of the frame 4 in correspondence with the division cut of the guide rails 12 and 13. The bracket 28 is rotatably supported on the bracket 28 with an operating shaft 30 having a knob 29 parallel to the frame 4. This operating shaft 30 has a worm
31 is pivoted, and this worm 31 is attached to the frame 4.
A drive shaft 33 having a worm wheel 32 that meshes with is rotatably mounted on the other end, and the other end of the drive shaft 33 has a pinion 35 that meshes with a rack 34 formed on the slide base 15. Is fixed. By doing this operation shaft 30
When the rotating operation is performed, the drive shaft 33 is rotated through the engagement between the worm 31 and the worm wheel 32, and the engagement between the pinion 35 and the rack 34 causes the sprocket 18 together with the slide base 15.
Is advanced and retracted, and the phase of the drive shaft 2 and the driven shaft 5 is adjusted by the expansion and contraction of the chain 7 tension side. 36
Is a fixing screw with a knob that is screwed into the screw hole of the bracket 28 to fix the rotation of the operation shaft 30 in the adjusted phase.

The operation of the phase adjusting device configured as described above will be described. The drive shaft 2 is rotated by being driven from the prime mover side, and each cylinder of the printing apparatus 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 in the paper feeding device and the paper is transported by the transport tape. Tension is applied to the chain 7 by the tension sprockets 8, 9, 22 and the sprocket 18. Then, for example, when the feeding of the paper to the printing device is delayed due to the slip between the transport tape and the paper in the paper feeding device, the fixing screw 36 is loosened during the operation of the machine, and then the knob 29 is gripped and operated. When the shaft 30 is rotated, the worm 31 and the worm wheel 32
The drive shaft 33 is rotated via the pinion 35 and the rack 34, and the sprocket 18 is moved to the first position together with the slide base 15.
Move down in the figure. In this case, since the force of moving the sprocket 18 by the drive device 27 overcomes the elastic force of the compression coil spring 24, the total length of the chain 7 does not change, but the tension side of the chain 7 becomes longer than that shown in the figure. The side becomes shorter. Here, since the drive shaft 2 is connected to the driving side of the printing apparatus and cannot freely rotate, the driven shaft 5 is indicated by the arrow B.
It slightly rotates in the direction, and the phase of the driven shaft 5 advances with respect to the drive shaft 2. Therefore, the phase of the paper feeding device is advanced with respect to the printing device, and the paper feeding timing to the printing device, which was delayed due to the slip of the paper, is advanced and returns to the normal timing. Note that the tension sprockets 8 and 9 are fixed to the shaft and only rotate in the same phase. If the fixing screw 36 is tightened after the phase adjustment, the phase will not change. Since the above operation can be performed while the machine is operating, it can be performed while observing the paper supply state to the printing apparatus.

Even when the chain 7 is extended due to long-term use and the overall length is increased 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.

〔The invention's effect〕

As is apparent from the above description, according to the present invention, the sprocket and the tension sprocket that are abutted from the inside to the tension side and the slack side of the chain between the paper feed device driven side sprocket and the printing device drive side sprocket, respectively. And a moving member that rotatably supports a sprocket that abuts on the tension side, and a support member that rotatably supports a tension sprocket that abuts on the slack side, and the chain on the frame of the sheet-fed printing press. Of the moving member and the supporting member so that the sprocket is moved and adjusted in the direction in which the length of the chain on the tension side changes. By providing the operating means, the phase between the paper feeding device and the printing device can be adjusted due to slipping of the paper and the transport tape, stretching of the chain, etc. If changed, it is possible to modify this during operation of the machine by operating the operating means, the generation amount of broke and enhanced productivity is reduced,
Adjustments can be made while looking at the paper feed status, enabling quick and appropriate adjustments. Further, unlike the conventional case, the planetary gear mechanism is not used, so that there is no influence of backlash and the phase is stable, and the adjustment amount is large, and a wide phase change can be dealt with. Furthermore, since the support member also moves via the compression spring along with the movement of the moving member, the tension of the chain is always kept constant and rattling due to slack of the chain,
Due to the overtension, it is possible to prevent the bearing portion of the drive shaft or the driven shaft and the chain itself from being damaged.

[Brief description of drawings]

1 to 3 show an embodiment of a phase adjusting device of a sheet-fed printing press according to the present invention, FIG. 1 is a side view of a chain drive device which carries out the same, and FIG. 2 is a part of FIG. FIG. 3 is a partially cutaway B plan view of FIG. 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, 12,13 ...... Guide rail, 15 ...... Slide base, 16 ...... Short shaft, 18 ...... Sprocket, 19 ...... Slide block, 22 ...... Tension sprocket, 24 ...... Compression coil spring, 27 ...... Drive device, 30 …… Operation axis, 31 …… Warm, 32 …… Warm wheel, 33 …… Drive axis, 34 ……
Rack, 35 ... Pinion.

Claims (1)

[Claims] 1. A phase adjusting device for a sheet-fed printing press, which adjusts the phases of a paper feed device driven side sprocket and a printing device drive side sprocket that are drivingly connected by a chain, wherein the paper feeding device driven side sprocket and the printing device. A sprocket and a tension sprocket are attached to the tension side and the slack side of the chain from the inside between the drive side sprocket and a moving member that rotatably supports the sprocket attached to the tension side, and the slack side. And a supporting member that rotatably supports a tension sprocket that is attached to the frame, is held by the frame of the sheet-fed printing press so as to slide in the chain tension direction, and is compressed between the moving member and the supporting member. A movement that adjusts the sprocket in the direction in which the length of the chain on the tension side changes, with a spring interposed. Phase adjusting apparatus of a sheet-fed printing press, characterized in that a work unit.