JPH05170378A - Holding device for folding machine - Google Patents

Abstract

PURPOSE:To prevent abrasion of a driven part and noise generated by the abrasion of the part as well as those of a directly lost striken part of a holding device by providing a cam system to constantly open and close the whole of the holding system and a cam system to selectively hold a part of the holding system in an opening state or in a closing state on the side surface of a transfer drum. CONSTITUTION:A holding drum is furnished with a lost striking preventive cam 31. A lever 33 is fastened on an edge part of a shaft 23 to oscillate, open and close a holding plate 17, and cam followers 25, 32 are installed on the same lever 33. The cam follower 25 is driven by a cam 27 fixed on a flame through a cam receiver 26, the shaft 23 revolves, and the holding plate 17 opens and closes against a holding plate receiver 18. The cam follower 32 is installed on a shaft 9a of the holding drum 9 free to rotate, and it is changed over from a lost striking preventive position to a non-working position and vice versa by the lost striking preventive cam 31 revolving by an air cylinder 34. Consequently, it is possible to prevent abrasion of a lost stricken part of the holding device and a part to drive it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gripping device which is installed in a folding machine and is applied to a cylinder for conveying sheets or signatures, and a blanking prevention device.

[0002]

2. Description of the Related Art FIG. 3 shows an example of the arrangement of cylinders provided in a single width folding machine. The paper folded in two in the running direction by the triangular plate 1 or the web from the guide roller 2 passes through the first-stage nipping roller 3, the vertical sewing machine blade device 4, and the second-stage nipping roller 5, and then becomes the saw cylinder 6. It is sent between the receiving cylinders 7. Next, at the same time as being pierced by the needle 14 of the receiving cylinder 7, it is cut by the saw blade 13 of the saw cylinder 6 and the saw blade receiver 15 of the receiving cylinder 7 to form a folding tab or sheet, and the needle 14 of the folding cylinder 8 After being re-stabbed and rotated around the folding cylinder 8 to be non-overlapped or overlapped, the folding blade 16 of the folding cylinder 8 folds it between the gripper plate 17 and the gripper plate 18 of the gripper cylinder 9 to make them parallel to each other. It will be folded (folded in two parallel to the cutting surface). This parallel fold is arranged such that the holding plate 17 of the holding cylinder 9 causes the first reduction cylinder 10 to move.
Claw 19 and claw seat 20, and further the claw 19 of the first reduction cylinder 10 is sent while being bitten by the claw 19 of the second reduction cylinders 11 and 12, and is conveyed by the second reduction cylinders 11 and 12 respectively. 22 is discharged onto.

FIG. 4 shows an example of the arrangement of the cylinders provided in the double width folding machine. 1, 2, 3, 4, 5, 6, 7, and 8 are triangular plates, guide rollers, first-stage nipping rollers, vertical sewing machines, second-stage nipping rollers, saw cylinders, and receiving cylinders, respectively, as in FIG. The difference between the folding cylinder and the folding cylinder in FIG. 3 is that the width in the cylinder is double that in FIG.
A shaft 23 (FIG. 5) for swinging each of the needle 14 folding blade 16, the holding plate 17 or the claw 19 of the two is provided in each of the driving side portion and the operating side portion, which are bisected in the width direction of the body. That is the point. The same applies to the cylinders after the gripper cylinder 9, but the illustration is omitted in FIG.

In FIG. 5, a cam follower 25 attached to a lever 24 fixed to the tip of the shaft 23 is driven by a cam 27 fixed to the frame via a cam receiver 26, and the shaft 23 rotates. , Needle 14 and folding blade 1
7 protrudes (bites) from the outer peripheral surface of the torso and retracts (releases). Further, the holding plate 17 and the claw 19 open (release) and close (bite) the holding plate receiver 18 and the claw seat 20, respectively. The double width folding machine of FIG. 4 is provided with cams 27 for rotating the shaft 23, one set on each side of each cylinder.

Next, in FIG. 3, when sheets or signatures are not stacked on the folding cylinder 8 (non-stacking), A and B are used.
The holding plate 17 of the side (all) holding cylinder 9, the first reduction cylinder 10 and the claws 19 of the second reduction cylinders 11 and 12 bite. When stacking, the holding plate 17 or the claw 19 on the B side of the torso described above bites, but the A side does not need to hold, but the biting operation is performed.

[0006]

The above-mentioned prior art has the following problems. When stacking with a single-width or double-width folding machine, the gripping device on either side (A side in FIG. 3) does not need to be gripped, but a biting motion, that is, a blanking motion is performed. Further, in a double-row folding machine with two rows, when there is no paper in either one of the driving and operating sides, the gripping device on the side without paper blanks all. In addition, when stacking, the side with the paper (A side in FIG. 3) is blanked.

[0007] In this way, when the blank is driven, not only the components such as the holding plate and the holding plate receiver, the claw and the nail seat, the needle, etc. that directly drive the components, but also the components that drive these components, for example, the component that directly drives the components are rocked. Wear of the shaft or the bearing of the cam follower is accelerated, the life is shortened, and noise is increased due to the wear. It is an object of the present invention to provide a device for preventing premature wear of the gripping device due to idle driving.

[0008]

[Means for Solving the Problems]

(1) A hitting prevention cam that stops the operation of the gripping device that does not need to be gripped is provided. (2) This blank hitting prevention cam is provided in the vicinity of a cam for driving the holding device fixed to the frame on the shaft of the barrel. (3) The hitting prevention cam is rotated by an appropriate angle by the actuator to take the hitting prevention position and the non-acting position.

[0009]

[Action]

(1) Since the idling prevention cam rotates together with the cylinder, the position of the cam follower provided at the shaft end of the gripper rotating with the cylinder can be freely changed by rotating the idling prevention cam. As well as being able to hold it in that position at all times. (2) The protrusion of the run-away prevention cam moves the position of the cam follower driven by the gripper drive cam fixed to the frame to the position where it is not driven at the run-away prevention position, so the cam follower swings. If not, the gripper and claws of the gripper will remain open or closed and will not be run dry. (3) In the non-acting position, the cam projection of the runaway prevention cam
Since the cam follower rotates to a position where it does not come into contact with the cam follower, the cam follower is driven by the gripper drive cam.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. Although the basic structure and operation of the gripper cylinder 9 are the same as those of the conventional device, the gripper cylinder according to the present invention has a blank hitting prevention cam 31
Equipped with. A lever 33 is fixed to the end of a shaft 23 that swings and opens and closes the holding plate 17, and cam followers 25 and 32 are attached to the lever 33. Cam follower 2
5 is a cam 2 fixed to the frame via a cam receiver 26.
Driven by 7, the shaft 23 rotates, and the holding plate 17 opens and closes the holding plate receiver 18. Cam follower 32
Is attached to the shaft 9a of the gripper cylinder 9 so as to be rotatable and is rotated by the air cylinder 34.
Thus, the blanking prevention position shown by the solid line and the non-acting position shown by the alternate long and short dash line are switched.

In the idling prevention position, the protrusion 31a of the idling prevention cam 31 swings the lever 33 via the cam follower 32, so that the cam follower 25 of the lever 33 causes the cam 2 to move.
At the same time it moves to a position where it does not touch the profile of 7
The shaft 23 also rotates together with the lever 33, and the gripper plate 17 is held in the open position apart from the gripper plate receiver 18. However, Figure 3
The A side only opens and closes the B side. On the other hand, in the non-acting position, the protrusion 31a of the idling prevention cam 31 is rotated to a position where it does not contact the cam follower 32, and the cam follower 25 is driven by the cam 27, so that the shaft 23 on both the A side and the B side is driven.
Swings, and the holding plate 17 opens and closes the holding plate receiver 18.

It should be noted that one end of the air cylinder 34 is pivotally attached to the side surface of the gripper cylinder 9 and the other end is pivotally attached to the idling prevention cam 31, and the air cylinder 34 is expanded and contracted by the compressed air from the air passage 34a. ..

[0013]

The gripping device of the folding machine according to the present invention is a gripping cylinder or a deceleration cylinder or the like provided with a gripping plate and a gripping plate support for gripping and transporting a sheet or a signature, or a plurality of gripping mechanisms such as a claw and a claw seat. In the transport cylinder of the above, a cam mechanism for constantly opening and closing all of the gripping mechanism and a cam mechanism for selectively holding a part of the gripping mechanism in an open state or a closed state are provided on a side surface of the transport barrel. By this, it is possible to eliminate the idle hitting of the gripping mechanism.

Therefore, not only the parts of the holding device such as the holding plate and the holding plate receiver, the claws and the claw seats, the needles, etc., which occur for the blank driving, but the parts for driving these parts of the holding device, for example, Wear of the shaft or the cam follower bearing that swings the parts to be directly driven is eliminated, and the life of these parts is extended. Further, it is possible to prevent noise caused by wear of the above-mentioned parts caused by blank driving.

[Brief description of drawings]

FIG. 1 is a plan view showing a partial cross section of an embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a side view showing an arrangement of cylinders provided in a single-width folding machine.

FIG. 4 is a side view showing an arrangement of cylinders provided in a double width folding machine.

FIG. 5 is a plan view showing, in a partial cross section, a shaft end portion of a gripper cylinder of a conventional folding machine.

[Explanation of symbols]

 9 Grip body 17 Grip plate 18 Grip plate support 23 Grip mechanism shaft 25 Cam follower 27 Opening / closing cam 31 Ignition prevention cam 32 Cam follower 33 Lever 34 Air cylinder

Claims (1)

[Claims] 1. A carrier cylinder such as a gripper cylinder or a speed reducer cylinder provided with a plurality of gripper mechanisms such as a gripper plate and a gripper plate holder or a pawl and a nail seat for gripping and transporting a sheet or a signature, and a side surface of the transport cylinder. A gripping device for a folding machine, further comprising: a cam mechanism that constantly opens and closes all of the gripping mechanism and a cam mechanism that selectively holds a part of the gripping mechanism in an open state or a closed state.