JP2000309084A - Carrier device for sheetlike material in sheet-fed rotary printing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a carrier device for sheetlike material in a sheet-fed rotary printing machine in which enhancement of durability is contrived. SOLUTION: Gripping of paper and a gripping change of paper are performed by a gripper 13 and a gripper base 10 provided in the shaft 4 of a sheet feeding cylinder by rotating the shaft 4 thereof. In a pressing member 23 freely rotatably inserted into the large diameter part 18a of a rod via a bearing 22, a chamfer part 23a is brought into contact with a braking member 28. A pressing lever 25 freely rotatably supported on the shaft 4 of the sheet feeding cylinder is press-welded to the pressing member 23 via the braking member 28 by a compressive coil spring 31. A center of the rotation of the pressing member 23 is made eccentric for the center of rotation of the rod turned while following rotation of the shaft 4 of the feeding cylinder 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet-fed rotary printing press, in which the edge of a sheet fed from the upstream side in the direction of transport of the sheet is held by a swinging claw and conveyed to a printing cylinder. 1. Field of the Invention

[0002]

2. Description of the Related Art Generally, in this type of paper transport device, sheets are sucked one by one from a paper feeder through a suction port of a sucker device and transported, and then fed onto a feeder board by rotation of a paper feed roller. The sheet is conveyed on the feeder board toward the difference plate by a paper feed tape or the like. The leading edge of the sheet fed onto the plate is aligned at the register, held by the swing claws, conveyed to the printing machine cylinder by the swing of the swing, and then replaced by the cylinder claws. .

[0003] In this type of paper transport device, the tail of the paper expands (or contracts) in the left-right direction due to moisture and a large pressure when printing is performed on the paper. Or shrinkage), the printing register on the trailing side of the paper during multicolor printing, which is referred to as “meeting registration”, shifts, causing a problem of poor printing. As a solution to this problem, there is one disclosed in Japanese Patent Application Laid-Open No. 7-52361.

[0004] Disclosed herein is a rod which is supported movably in the axial direction within a swing shaft, a slide member which moves integrally with the rod and is provided with a cam follower, and a cam which comes into contact with the cam follower. And a cam plate having a surface and fixed to the claw rest. Then, following the swing of the swing shaft, the rod reciprocates in the axial direction, and the slide member also reciprocates in the axial direction, so that when the paper is held by the pawl via the cam follower and the cam plate, the pawl base is moved. When the sheet is bent in the paper conveying direction and is switched to the body, the claw rest returns to a flat shape.

[0005]

However, in the above-mentioned conventional sheet-conveying apparatus for a sheet-fed rotary printing press, the rod of the cam follower pressed against the cam surface of the cam plate moves in the axial direction. At this time, the roller rolls on the cam surface and does not slide on the cam surface, but slides on the cam surface at the left and right moving ends of the rod. That is, at the left and right moving ends of the rod where the moving direction of the cam follower changes, the movement of the cam follower stops because the rod temporarily stops, but the cam follower is stopped due to the rolling inertia acting on the cam follower. , The surface of the cam follower slides on the cam surface. Also, when the rod starts to move from a stopped state, the rolling of the cam follower cannot completely follow the movement of the cam follower, and the surface of the cam follower temporarily comes into sliding contact with the cam surface. In this case, the length of the cam follower in sliding contact is set to several mm in order to cause the claw base to bend.
It reaches mm unit. In addition, in the above-described sheet-like material transporting apparatus of a sheet-fed rotary printing press, since the cam follower is pressed against the cam surface of the cam plate with a large pressure by linear contact, a load is applied to the portion pressed against the cam surface. Is concentrated. As described above, since the load slides on the cam surface of the cam plate while the load is concentrated on the cam surface and a part of the cam follower, the cam surface and a part of the cam follower are liable to wear, and there is a problem in durability.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-described conventional problems, and an object of the present invention is to provide a sheet conveying device for a sheet-fed rotary printing press with improved durability.

[0007]

In order to achieve this object, according to the first aspect of the present invention, a shaft rotatably supported between frames and an end of a sheet-like material supported on the shaft side are provided. A claw and a claw base to be held, and a claw shaft provided with a plurality of the claw in the axial direction of the shaft, the shaft is rotated, and the claw and the claw base are fed from the upstream side in the conveying direction of the sheet. A sheet-conveying device for a sheet-fed rotary printing press that conveys the end of the sheet-like material to the cylinder in addition to the rod, the rod having an eccentric portion extending parallel to the axis and rotatably supported at both ends; A driving means for rotating the rod,
A pressing member rotatably fitted into the eccentric portion of the rod and having an engaging portion formed on a part of the outer peripheral portion; and a surface contacting the engaging portion of the pressing member, and pressing by the rotation of the rod. And a displacing means for displacing the claw shaft in the paper conveying direction by displacing through a member. Therefore, when the displacement means deflects the claw shaft in the paper transport direction, the load for pressing the engaging portion of the pressing member that is in surface contact with the displacing member is dispersed, and the engaging portion of the pressing member is displaced from the displacing member Therefore, wear between the engaging portion of the pressing member and the displacement member is relatively reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing a part of a sheet-like material transporting device of a sheet-fed rotary printing press according to the present invention, and FIG.
Is a side view showing a schematic configuration, and FIG.
FIG. 4 is a sectional view taken along line IV-IV in FIG. 1, and FIG. 5 is a sectional view taken along line VV in FIG. FIG. 6 is an enlarged front view of the same main part, FIG. 7 is a view taken along the line VII in FIG. 6 for explaining the structure of the fixed cam, and FIG. 8 is a view VII in FIG. Arrow view,
FIG. 9 is a diagram showing the positions of the nails when the paper is held and when the paper is changed. FIG. 10 is a schematic diagram for explaining the amount of displacement of the large-diameter portion of the rod when the paper is held and when the paper is changed. 7, the illustration of the movable cam is omitted for convenience, and the illustration of the fixed cam is omitted in FIG.

In FIG. 1, reference numeral 1 designates a swing, which is a paper transport device of a sheet-fed printing press, which is mounted on left and right frames 2, 2 via holders 3a, 3a and bearings 3, 3. A hollow paper feed cylinder shaft 4 rotatably supported is provided. In FIG. 2, the difference plate 6a
The paper 6 conveyed to the point a, which is the paper holding position of the paper feed cylinder 1 a, by the lower swing 5 from the register portion, is held by the claw 13 of the claw shaft 11, which will be described later. The paper 6 is conveyed to the position of the point b, that is, the position where the paper 6 is held by the impression cylinder 7. The paper feed cylinder shaft 4 is configured to rotate via a gear using the prime mover as a drive source, similarly to the impression cylinder 7.

The upper ends of a pair of opposing support levers 8 are fixed to both ends of the paper feed cylinder shaft 4, and a claw bar 9 is fixed between the support levers 8. A plurality of claw tables 10 are fixed to the base bar 9 so as to be arranged in the axial direction of the paper feed cylinder shaft 4. At the lower ends of the opposing support levers 8, 8, a pawl shaft 11 is provided with a bearing 12.
The claw shaft 11 is rotatably supported so as to be parallel to the claw base bar 9. The claw shaft 11 is provided with a plurality of claws 13 that are in contact with the claw base 10. One end of a lever 14 is fixed to a protruding end of the claw shaft 11 protruding from the right support lever 8, and a roller 15 is pivotally supported at the other end of the lever 14.

Reference numeral 16 denotes a full-circle cam.
Reference numeral 6 denotes a holder 3 so that the holder 3
It is fixed to the frame 2 via a. The above-mentioned roller 15 is constantly pressed by the entire circumference cam 16 by the torsion moment of the torsion bar 11a in the claw shaft 11, and is urged to rotate in the direction in which the claw 13 is closed. Therefore, when the paper feed cylinder shaft 4 rotates and the claw 13 of the claw shaft 11 is positioned at the point a in FIG. 2, the torsion moment of the torsion bar 11a causes the claw 13 to come into contact with the claw base 10 and the end of the paper 6 to move. Mouth. When the claw 13 of the claw shaft 11 is located at the point b in FIG. 2, the roller 15 comes into contact with the large-diameter portion of the cam 16 around the entire circumference.
Since the claw shaft 11 is rotated via the lever 14 against the torsional moment of the torsion bar 11a, the claw 13 is separated from the claw base 10 and the paper 6 is switched to the cylinder 7. Have been.

In FIG. 1, reference numeral 18 denotes a rod formed in a rod shape, and a large diameter portion 18a is provided from the center of the rod 18 to the right side in the figure. The rod 18 is provided with a bearing 19 of the left support lever 8 and bearings 21 and 21 of a pair of bearing members 20 and 20 fixed to the paper feed cylinder shaft 4.
1 and supported rotatably so as to be parallel to the paper feed cylinder shaft 4. A pair of cylindrical pressing members 23, 23 are rotatably inserted into the large diameter portion 18a of the rod 18 via bearings 22, 22, and as shown in FIG. A chamfered portion 23a as a flat engaging portion is provided in a part of the outer peripheral portion. With respect to the rotation center C1 of the bearings 19 and 21 that rotatably support the rod 18, the pressing member 23
Bearing 22 for rotatably supporting the rod on the rod 18
Are positioned so that the center of rotation C2 of them is eccentric.

Corresponding to the pair of pressing members 23, a pair of pressing levers 25 serving as displacement means are rotatably fitted to the paper feeding cylinder shaft 4 via bushings 26 so as to be rotatable. The movement in the axial direction is restricted by the holder 27 fixed to the shaft 4. As shown in FIG. 4, a lower end of the pressing lever 25 is provided with an insertion hole 25a into which the claw shaft 11 is inserted, and a side portion is provided with a projection 25b having a recess 25c. . The above-mentioned claw bar 9 is fixed to this pressing lever 25 by bolts 24.

The protrusion 25b of the pressing lever 25 has
A rectangular parallelepiped braking member 28 is fixed. Reference numeral 29 denotes a bracket fixed to the paper feed cylinder shaft 4. A set screw 30 is screwed into a screw portion 29a of the bracket 29.
A compression coil spring 31 is elastically mounted between the flange portion 30a of the set screw 30 and the recess 25c of the pressing lever 25 described above. Therefore, the pressing lever 25 is urged to rotate counterclockwise in the drawing about the paper feed cylinder shaft 4, and the braking member 28 is moved to the chamfered portion 23 a of the pressing member 23.
Is pressed against.

In FIG. 1, one end of a lever 33 is pivotally mounted on a protruding end of the rod 18 which protrudes from the left support lever 8, and a cam follower 34 is pivotally mounted on a swinging end of the lever 33. ing. Reference numeral 35 denotes a cam, which is composed of a fixed cam 35a and a movable cam 35b, as will be described later, and a cam follower 34 is in contact with the cam 35. One end of a lever 36 is pivotally attached to a portion located inside the support lever 8 on the left side of the rod 18, and a head 37a of a rod 37 is pivotally attached to the swinging end as shown in FIG. ing. The rod 37 is slidably supported in a fitting hole of a stud 38 pivotally attached to the support lever 8, and a compression coil spring 39 wound around the rod 37 is elastically provided between the stud 38 and the head 37a. Is equipped. Accordingly, in FIG. 3, the rod 18 is urged to rotate in the counterclockwise direction through the lever 36 by the resilient force of the compression coil spring 39, and the cam follower 34 is
Are pressed against the cam 35.

In FIGS. 6 and 7, reference numeral 40 denotes a fixed cam mounting ring formed in a substantially annular shape.
Is provided around the paper feed cylinder shaft 4 in the vicinity of
Is fixed to the holder 3a. A fixed cam 35 a formed in a semicircular ring shape is fixed to the fixed cam mounting ring 40 so as to be provided around the paper feed cylinder shaft 4.

In FIG. 6 and FIG.
an operating shaft provided with a, which is fitted into a fitting hole of a stud 43 pivotally mounted on a pedestal 42 fixed to the frame 2,
The stud 43 is rotatably supported. Operation shaft 41
The lower end of the connecting member 44 is connected to the upper end of a connecting member 44 via a universal joint, and a threaded rod 45 is screwed into a hollow thread portion of the connecting member 44. It is fixed to the connecting member 44 by a nut.

By rotating the knob 41a and rotating the screw rod 45 via the operating shaft 41 and the connecting member 44, the movable cam 35b is rotated about the pin 49 as shown by a two-dot chain line in FIG. The paper feed cylinder shaft 4 is configured to be able to freely contact and separate therefrom. That is, the threaded rod 45 is screwed into the threaded portion of the stud 46, the stud 46 is pivotally supported by one end of the bracket 47, and one end of the movable cam 35 b is fixed to the other end of the bracket 47. The movable cam 35b is formed in a semicircular ring shape, is provided around the paper feed cylinder shaft 4, and a support lever 48 attached to the other end is pivotally attached to the fixed cam attachment ring 40 via a pin 49. ,
The pin 49 is rotatably supported on the side of the frame 2 around the center of rotation.

The fixed cam 35a and the movable cam 35b are provided around the paper feed cylinder shaft 4 so as to face each other, and the open ends of these cams 35a and 35b (for convenience in FIGS. ) Are formed so as to have a small thickness with respect to each other, and these portions are positioned so as to overlap with each other. This is to prevent the occurrence of a joint between the cams 35a and 35b. That is, in the paper transport operation described later, the cam followers 34
This is because the cam follower 34 engages with both the cams 35a and 35b when rotating while contacting around the 5a and 35b, thereby preventing the machine during printing from being damaged. As shown in FIG. 6, the support portion 40b protruding from the fixed cam mounting ring 40 is provided with a pin 52 as shown in FIG.
Is pivotally connected to the connecting member 44 via the

Next, the operation of transporting paper in the sheet transporting apparatus of the sheet-fed rotary printing press having the above-described configuration will be described.
When the paper feed cylinder shaft 4 is rotated by driving from the prime mover and the swing 1 is rotated from the position of the point b to the position of the point a in FIG. 2, the support lever 8 is also rotated and the claw shaft 11 is also rotated. The rotation of the claw shaft 11 causes the roller 15 to come into contact with the small-diameter portion of the circumferential cam 16 so that the claw shaft 11 is
Since the paper 6 is rotated by the torsional moment 1a, the end of the paper 6 is held by the claw 13 and the claw base 10 at the point a. At the same time, the rotation of the paper feed cylinder shaft 4 causes the cam follower 34 to also rotate around the paper feed cylinder shaft 4 and ride on the movable cam 35b as shown in FIG. 8, so that the rod 18 rotates clockwise in FIG. Move.

When the rod 18 rotates, in FIG.
The rotation center C2 of the pressing member 23 is the rotation center C of the rod 18.
Due to the eccentricity with respect to 1, the pressing member 23 moves slightly downward in the drawing via the bearing 22. Therefore, the pressing lever 25 slightly rotates clockwise in the drawing around the paper feed cylinder shaft 4 against the elastic force of the compression coil spring 31. For this reason, the claw shaft 11 fitted in the fitting hole 25a of the pressing lever 25 and the claw bar 9 fixed by the bolt 24 are also pressed to the left in the figure,
The claw shaft 11 and the center portion of the claw bar 9 bend by α as shown by a two-dot chain line in FIG.

Due to the bending of the claw shaft 11 and the claw bar 9, the claw 13 and the claw base 10 of the swing 1 are juxtaposed with the claw shaft 11 and the claw bar 9 at the position of the point a, that is, the position for holding the paper 6. Among the plurality of claws 13 and the claw base 10, the center claw and the claw base are positioned at positions retracted by α from the claw and the claw base on both sides. In this state, when the paper feed cylinder shaft 4 rotates and the swing 1 rotates from the position of the point a to the position of the point b, the cam follower 34 comes into contact with the fixed cam 35a, so that the rod 18 in FIG. To rotate. Therefore, in FIG.
2, the pressing member 23 moves slightly upward in the drawing, so that the pressing lever 25 is slightly moved counterclockwise in the drawing around the paper feed cylinder shaft 4 by the elastic force of the compression coil spring 31. Rotate.

For this reason, the claw shaft 11 by the pressing lever 25
The pressing of the claw bar 9 to the left in the drawing is released, and the claw shaft 11 and the claw bar 9 are positioned in a straight line as shown by a solid line in FIG. The plurality of claws 13 and the claw base 10 are also positioned on a straight line shown by a solid line in FIG. Therefore, the center nail and the claw base are moved, and as a result, both ends of the paper 6 are pulled by the claw and the claw bases at both ends, thereby stretching the paper buttocks. Even if phenomena occur, the paper butt is stretched by the time of the grip and these phenomena are corrected, so that the registration target is corrected.

At this time, as shown in FIG.
3 is rotatably supported by the large-diameter portion 18a of the rod 18 via a bearing 22, and the rotation of the rod 18 is restricted by the braking member 28 despite the rotation of the rod 18. Therefore, as shown in FIG. 10, when the large-diameter portion 18a of the rod 18 rotates by the angle θ, the vertical displacement amount α ′ of the large-diameter portion 18a is changed to the claw shaft 11 described above with reference to FIG.
And the amount of flexure of the center portion of the claw bar 9 is proportional to the amount α. On the other hand, the displacement δ in the left-right direction of the large-diameter portion 18a is extremely small with respect to the displacement α ′ in the up-down direction.
α 'is in mm, whereas in μm,
The chamfered portion 23a of the pressing member 23 hardly slides on the braking member 28. Moreover, since the chamfered portion 23a of the pressing member 23 is pressed against the braking member 28 by surface contact, the pressing force is dispersed at the chamfered portion 23a.
Therefore, the chamfered portion 23a of the pressing member 23 and the braking member 2
8 can be relatively reduced, so that the durability is improved. In order to rotate the rod 18 to bend the claw shaft 11 and the claw base 9, the lever 3 attached to the rod 18 is caused to follow the rotation of the paper feed cylinder shaft 4.
3 is performed by bringing the cam follower 34 into contact with a cam 35 fixed to the frame 2 side. Therefore,
Since a special drive source for rotating the rod 18 is not required, not only the number of parts is reduced but also the structure is simplified.

Next, when adjusting the bending amount α of the claw shaft 11 and the claw bar 9 in accordance with a change in the amount of extension (or contraction) of the paper 6 on the tail side, the knob 41a in FIG. When the screw rod 45 is rotated to rotate, the stud 46 moves up and down in the figure. Therefore, the bracket 47 also moves up and down, and the movable cam 35b
Is rotated clockwise or counterclockwise about the pin 49 as a rotation center, and the amount by which the cam follower 34 rides on the movable cam 35b changes. For this reason, since the amount of rotation of the rod 18 changes and the amount of pressing of the pressing member 23 to the pressing lever 25 also changes, the amount of bending of the claw shaft 11 and the claw bar 9 can be changed. Thus, the amount of bending of the claw shaft 11 and the claw bar 9 can be changed by rotating the knob 41 a attached to the frame 2. Therefore,
Since the printing can be performed without stopping the printing machine, productivity can be improved, and registration can be performed while registering, so that accurate adjustment can be performed.

In the present embodiment, the present invention is applied to the swing 1 of the rotating paper feed cylinder 1a. However, the present invention can be applied to a reciprocating swing. Also, the paper feed cylinder 1 is used as a rotating body.
Not only a but also other cylinders such as a paper transport cylinder and a transfer cylinder can be applied. Further, the conveyed material is paper, but any sheet-like material that can be printed on the surface may be used.

[0027]

As described above, according to the present invention, since the claw shaft and the claw bar are flexed, the wear between the pressing member and the displacement member can be relatively reduced.
The durability is improved.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a sheet conveying device of a sheet-fed rotary printing press according to the present invention.

FIG. 2 is a side view showing a schematic configuration of a sheet-like material transfer device of the sheet-fed rotary printing press according to the present invention.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a sectional view taken along line VV in FIG.

FIG. 6 is an enlarged front view illustrating a main part of the sheet-like material transporting device of the sheet-fed rotary printing press according to the present invention.

FIG. 7 is a view for explaining the structure of a fixed cam in the sheet-like material transporting device of the sheet-fed rotary printing press according to the present invention.
FIG.

FIG. 8 is a view for explaining the structure of a movable cam in the sheet-like material transport device of the sheet-fed rotary printing press according to the present invention.
FIG.

FIG. 9 is a diagram illustrating the positions of the claws when the paper is held and when the hand is switched in the sheet-like material transporting apparatus of the sheet-fed rotary printing press according to the present invention.

FIG. 10 is a schematic diagram for explaining a displacement amount of a large-diameter portion of a rod at the time of paper holding and at the time of gripping in the sheet-like material transfer device of the sheet-fed rotary printing press according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... swing, 4 ... paper feed cylinder shaft, 6 ... paper, 7 ... impression cylinder, 8
... Support lever, 9 ... Claw base bar, 10 ... Claw base, 11 ... Claw shaft, 13 ... Claw, 18 ... Rod, 19, 21 ... Bearing, 23 ... Pressing member, 23a ... Chamfer, 25 ... Press lever, 28: braking member, 31: compression coil spring, 34: cam follower, 35a: fixed cam, 35b: movable cam, 4
1a ... Picking.

Claims (1)

[Claims] 1. A shaft rotatably supported between frames, a claw and a claw base supported on the shaft side for holding an end of a sheet-like material, and a plurality of claws provided in an axial direction of the shaft. A sheet-fed rotary printing press, comprising: a claw shaft; and rotating the shaft to move the claw and the claw base together with an end of the sheet-like material sent from the upstream side in the sheet-conveying direction and transporting the sheet-like material to the cylinder. In the sheet conveying apparatus, a rod having an eccentric portion extending in parallel with the shaft and having both ends rotatably supported, a driving unit for rotating the rod, and a rotatable eccentric portion of the rod A pressing member which is fitted and has an engaging portion formed in a part of an outer peripheral portion; and a surface contacting the engaging portion of the pressing member, and the claw shaft is displaced via the pressing member by the rotation of the rod. And a displacement means for bending the paper in the paper transport direction. Sheet conveying device of a sheet-fed rotary printing press.