JP4050389B2 - Moving member fixing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a moving member fixing device suitably applied to a moving cam fixing device in a sheet-fed rotary printing press with a reversing mechanism that can be used for, for example, single-sided printing and double-sided printing.
[0002]
[Prior art]
FIG. 5 is a sectional view showing a switching device between single-sided printing and double-sided printing in a sheet-fed rotary printing press with a reversing mechanism to which a conventional moving member fixing device disclosed in Japanese Utility Model Laid-Open No. 7-28635 is applied. In the figure, reference numeral 52 denotes a fixed gear, which is fixed to an end shaft 50 of a reversing cylinder (not shown) that is rotatably supported by the frame 51, and a small diameter portion 52a is provided on a circumferential portion of the fixed gear 52. And a stepped through hole 52b penetrating the side surface portion is formed. A rotation gear 53 is supported by the small diameter portion 52b of the fixed gear 52, and has a recess 53a corresponding to the stepped through hole 52b. 54 is a stepped bolt in which a flange portion 54a and a head portion 54b are formed on one end side, and is fitted into the stepped through hole 52b. Reference numeral 55 denotes an engaging member which is fitted to the stepped bolt 54 and is brought into contact with the concave portion 53a of the rotating gear 53 by screwing the nut 56. 57 is interposed between the stepped through hole 52b and the flange portion 54a of the stepped bolt 54. It is a mounted disc spring. Due to the biasing force of the disc spring 57, the stepped bolt 54 is given a movement behavior in the direction of arrow G in the figure, and the fixed gear 53 is fixed to the fixed gear 52 by the engaging element 55 and is configured to rotate integrally. .
[0003]
Reference numeral 60 denotes a cam lever, which is rotatably supported by a bearing 58 having a base end fixed to the fixed gear 52 via a shaft 59, and forms a cam portion 60a that contacts the head 54b of the stepped bolt 54. ing. Reference numeral 61 denotes a guide fixed to the fixed gear 52. A slit for guiding the cam lever 60 is formed, and a compression spring 62 for urging the cam lever 60 in a direction opposite to the arrow I direction is fitted. Reference numeral 64 denotes a pressing member, which is formed with a flange portion 64 a that engages with the cam lever 60 and is slidably supported by a bush 65 fitted to the cover 63. Reference numeral 66 denotes a lever, which is swingably supported by a bearing 67 fixed to the cover 63 via a shaft 68, and has one end connected to the pressing member 64. The other end of the lever 66 is pivotally attached to a rod 71 of an air cylinder 70 fixed so as to stand on the frame 51 via a pin 69.
[0004]
In such a configuration, when switching from single-sided printing to double-sided printing, when the air cylinder 70 is operated and the rod 71 is advanced in the H direction, the lever 66 rotates about the shaft 68 as a rotation center, and the pressing member 64 moves in the direction of arrow I, the flange 64a presses the cam lever 60, and the cam lever 60 rotates in the J direction with the shaft 59 as the rotation center. As the cam lever 60 rotates in the J direction, the large diameter portion of the cam portion 60a is pressed against the head portion 54b of the stepped bolt 54, and the stepped bolt 54 is opposed to the arrow G against the biasing force of the disc spring 57. Therefore, the pressing force to the concave portion 53a of the engaging element 55 is released, and the rotation gear 53 is unintegrated with the fixed gear 52. In such a state, the rotating gear 53 is rotated by driving means such as a motor (not shown) so that the phase with the fixed gear 53 corresponds to double-sided printing.
[0005]
[Problems to be solved by the invention]
However, in the conventional moving member fixing device described above, the cam lever 60 that rotates about the shaft 59 and the compression spring 62 that imparts a return habit to the cam lever 60 are compressed as shown in FIG. The spring 62 is in contact with the axial direction of the spring 62 with an inclination of an angle α. Therefore, the compression spring 62 is compressed while being inclined in the direction of the arrow K by the pressing force of the cam lever 60 that is in contact with the corner 62 a at the upper end of the compression spring 62. A load is applied. Since this is a repeated load, there is a problem that the durability of the compression spring 62 is reduced due to metal fatigue on the one side portion 62A side.
[0006]
The present invention has been made in view of the above-described conventional problems, and an object thereof is to provide a moving member fixing device in which the durability of the urging means for urging the swinging member is improved. .
[0007]
[Means for Solving the Problems]
In order to achieve this object, the moving member fixing device according to the present invention urges one end of the swinging member supported so as to be swingable by the biasing means, thereby moving the moving member on the other end side of the swinging member. A moving member fixing device that fixes the moving member to the fixing member by pressing the fixing member against the fixing member and swinging the swinging member against the biasing means by the driving means. a site a moving member and said biasing means is engaged, thereby forming a tapered and concave respectively, and movably supporting the biasing means biasing direction in a direction substantially perpendicular to the said rocking member The urging means moves in a direction substantially orthogonal to the urging direction of the urging means as the oscillating member is oscillated by engagement with the urging means .
Therefore, even when the swinging member is in contact with the biasing means in an inclined state, the engaging portion between the swinging member and the biasing means slides and the biasing means moves in a direction substantially perpendicular to the biasing direction. Therefore, the biasing means does not tilt with respect to the biasing direction.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing a switching device between single-sided printing and double-sided printing in a sheet-fed rotary printing press with a reversing mechanism to which a moving member fixing device according to the present invention is applied. FIG. FIG. 4 is a cross-sectional view taken along the line III-III in FIG. 2, FIG. 4 is a schematic diagram for explaining the operation, (a) is an enlarged view, and (b) is a schematic diagram showing the overall operation.
In FIG. 1, reference numeral 2 denotes a pair of left and right frames (one is not shown) of the printing unit, and bearing bushes 3 are fitted to the left and right frames 2. A taper roller bearing 5 whose movement in the axial direction is restricted by a lid 4 is engaged with the bearing bush 3, and an end shaft of the impression cylinder 6 is pivotally supported by the taper roller bearing 5. .
[0009]
The impression cylinder 6 is restricted from moving in the axial direction by a nut 7 screwed into the threaded portion of the end shaft and its own stepped portion, and via a gear fixed to the end of the shaft (not shown). It is configured to be driven from the driving side. A notch (not shown) having a triangular cross section is provided at a location where the outer peripheral portion of the impression cylinder 6 is equally divided in the circumferential direction, and both ends thereof are closed by the bearer 11. In both the notches, the claw shafts 10 are rotatably supported by bearings (not shown) in bearing bushes 12 fitted to the bearers 11, and are axially supported by the collars 13. Movement is restricted. Conventionally known claws (not shown) including paper are arranged in parallel on each claw shaft 10, and levers 14 are fixed to both ends of the claw shaft 10, and the free end portions thereof. A wide cam follower 15 is pivotally attached to the pin.
[0010]
An annular cam base 16 provided concentrically with the impression cylinder 6 is fixed to the inner surfaces of the left and right frames 2 by bolts. An annular single-sided printing cam 17 is supported on the cam base 16 so that the outer peripheral cam surface thereof is in contact with the cam follower 15 and is fixed to the cam base 16 with bolts. An annular adjustment gear 18 is supported on the outer peripheral surface of the cam base 16, and an annular double-sided printing cam 19 is brought into contact with the cam follower 15 on the adjustment gear 18. The bearing is supported and fixed to the adjustment gear 18 by bolts.
[0011]
An intermediate gear 20 that meshes with the adjustment gear 18 is fixed to one end of a shaft 21 that is rotatably supported between the frame 2 and a bracket 22 fixed to the frame 2. A bevel gear 23 is attached to the other end of the shaft 21 protruding from the bracket 22, and a bevel gear 24 fixed to one end of the adjustment shaft 25 is engaged with the bevel gear 23. Therefore, when the adjustment shaft 25 is rotated, the adjustment gear 18 is rotated via the bevel gears 24 and 23, the shaft 21, and the intermediate gear 20, and is fixed to the double-sided printing cam 19 and the frame. The phase with the single-sided printing cam 17 is adjusted, and switching between single-sided printing and double-sided printing is performed.
The reversing mechanism described above is not particularly different from a switching device between single-sided printing and double-sided printing in a sheet-fed rotary printing press with a reversing mechanism that has been widely used conventionally.
[0012]
Next, a mobile cam fixing device, which is a feature of the present invention, will be described with reference to FIGS.
The movable cam fixing device 26 provided outside the frame 2 includes an air cylinder 27 that functions as a driving means, a swinging member 28 that is supported in a swingable manner, a disc spring 29 that functions as a biasing means, and a swinging motion. It is generally composed of an adjusting screw 30 with a hexagonal hole screwed into one end side of the member 28 and a pressing member 31 engaged with the other end portion of the swinging member 28.
[0013]
One end of a lever 32 is fixed to the rod 27a of the air cylinder 27, and one end of a lever 33 is pivotally attached to the other end of the lever 32 via a pin 32a. A concave portion 34 is formed on the outer surface of the frame 2, and a fixing base 35 is fixed to the bottom of the concave portion 34 with a bolt, and an upper portion of the fixing base 35 is formed of a pair of opposing support portions 35 a, 35a protrudes. The other end portion of the above-described lever 33 engaged between the support portions 35a and 35a is rotatably supported by the support portions 35a and 35a via a pin 36. As shown in FIG. 3, the cam part 33a is protrudingly provided.
[0014]
The swing member 28 is swingably supported via pins 38 horizontally mounted on both sides of the recess 34 so that one end 28a of the swing member 28 is engaged with the cam portion 33a of the lever 33, and the other end 28b. Is formed in a bifurcated shape, and a threaded portion 28c is formed on one end 28a side. As shown in FIG. 3, a hemispherical engagement portion 30a is formed at the tip of the adjustment screw 30, and the engagement portion 30a protrudes by being screwed into the screw portion 28c of the swing member 28.
[0015]
Reference numeral 40 denotes a presser formed in a substantially columnar shape. A flange portion 40a is formed on one end side, and a conical recess 40b is formed in the center of the surface of the flange portion 40a. An annular stopper 41 is fixed to the. A concave portion 34a having a small diameter is formed on the bottom portion of the concave portion 34 of the frame 2 corresponding to the adjusting screw 30. The diameter of the concave portion 34a is formed by 2Δ larger than the outer diameter of the stopper 41 described above. An annular spring receiving member 42 is loosely inserted into the pressing element 40, and the outer diameter of the spring receiving member 42 is formed larger than the inner diameter of the recess 34a. A disc spring 29 is mounted between them.
[0016]
The spring receiving member 42 is engaged with the edge of the recess 34a. Therefore, as shown in FIGS. 3 and 4, the pressing element 40 is pressed in the direction of arrow A by the urging force of the disc spring 29, and the concave portion 40 b is engaged with the engaging portion 30 a of the adjusting screw 30. Is biased to rotate counterclockwise about the pin 38 as a center of rotation. In this state, the lower end portion of the pressing element 40 faces the recessed portion 34a, and a gap Δ is formed between the stopper 41 and the recessed portion 34a. It is movable in the direction of arrow CD, which is a direction orthogonal to the direction.
[0017]
An insertion hole 34b is formed in a portion corresponding to the adjustment gear 18 at the bottom of the recess 34 of the frame 2, and a substantially cylindrical pressing member 31 is attached to the bush 44 fitted in the insertion hole 34b by an arrow A-. It is slidably supported in the B direction. The upper end portion 31a of the pressing member 31 is formed in a substantially H-cut cross section, and the upper end portion 31a is formed in the pair of other ends 28b formed in the bifurcated shape of the swing member 28 described above, as shown in FIG. And a pin 45 implanted on the side surface of the pressing member 31 is engaged with the lower end of the other end 28b.
[0018]
Next, an operation for switching from single-sided printing to double-sided printing in a sheet-fed rotary printing press with a reversing mechanism having such a configuration will be described.
By operating the air cylinder 27 and retreating the rod 27a, the lever 33 rotates counterclockwise in the figure with the pin 36 as the rotation center via the lever 32, as shown by a two-dot chain line in FIG. To do. As shown in FIG. 3, since the cam portion 33 a of the lever 33 presses one end 28 a of the swing member 28, the swing member 28 resists the biasing force of the disc spring 29 and rotates clockwise about the pin 38. To turn. That is, as shown in FIGS. 4A and 4B, the engaging member 30 a of the adjusting screw 30 is recessed in the presser 40 while the swinging member 28 rotates clockwise around the pin 38. 40b is pressed in the direction of arrow B.
[0019]
At this time, the engaging portion 30a is formed in a hemispherical shape, the concave portion 40b is formed in a conical shape, and the pressing element 40 is in a direction orthogonal to the urging direction of the disc spring 29, that is, in the direction of the arrow CD. Since it is supported movably, the engaging portion 30a moves the pressing element 40 in the direction of arrow B and smoothly moves the distance δ in the direction of arrow C while smoothly sliding on the surface of the recess 40b. Therefore, the pressing element 40 maintains a state in which the axial direction thereof coincides with the arrows AB, which are the urging directions of the disc springs 29, so that the disc springs 29 are not compressed so as to be inclined. For this reason, since a large load is not applied to one side of the disc spring 29, the durability of the disc spring 29 is not affected.
[0020]
Further, since the engaging portion 30a is engaged with the concave portion 40b at two points E and F, when the pressing member 40 is pressed in the arrow B direction, the pressing member 40 is swung in the arrow CD direction. And can be pressed in a stable state. In addition, since the disc spring 29 is not directly brought into contact with the edge of the recess 34a of the frame 2 but through the spring receiving member 42, the frictional force generated between the edge of the recess 34a is reduced. The movement of the pressing element 40 in the direction of the arrow CD is smoothly performed. Further, since the disc spring 29 is not directly engaged with the adjusting screw 30 and is performed through the pressing element 40, the recess 40b is easily processed and the disc spring 29 is not formed with a recess. The spring characteristics of the spring 29 are not impaired.
[0021]
Since the urging force of the disc spring 29 is released from the pressing member 31 and the pressing of the adjustment gear 18 in the direction of arrow B is released, the fixing of the double-sided printing cam 19 integral with the pressing member 31 to the single-sided printing cam 17 is released. When the adjustment shaft 25 is rotated, the adjustment gear 18 is rotated via the bevel gears 24 and 23, the shaft 21, and the intermediate gear 20, and the double-sided printing cam 19 integrated therewith is also rotated and fixed to the frame. The phase with the single-sided printing cam 17 is adjusted, and switching between single-sided printing and double-sided printing is performed.
[0022]
When the switching is completed, when the air cylinder 27 is deactivated, the actuating rod 27a advances, the lever 33 rotates clockwise with the pin 36 as the center of rotation, and engages with one end 28a of the lever 28. The engaged cam portion 33a is released. The pressing force 40 is pressed in the direction of arrow A in FIG. 3 by the biasing force of the disc spring 29, and the pressing force is transmitted to the swing member 28 via the adjusting screw 30, and the swing member 28 is rotated with the pin 38. Energizes counterclockwise as the center. Since the other end 28b of the swing member 28 presses the pressing member 31 in the direction of arrow B via the pin 45, the adjustment gear 18 is pressed in the direction of arrow B by the pressing member 31, and the double-sided printing cam 19 integrated therewith. Is pressed and fixed to the single-sided printing gear 17 which is a fixed cam. Also at this time, since the pressing element 40 is not inclined with respect to the arrow AB direction, a sufficient oscillating bias is applied to the oscillating member 28 without impairing the spring characteristics of the disc spring 29. Can do. Further, by moving the adjustment screw 30 back and forth, the pressing force applied to the swing member 28 by the disc spring 29 can be adjusted.
[0023]
In the present embodiment, an example in which the double-sided printing cam is used in a sheet-fed rotary printing press with a reversing mechanism is shown, but it can also be applied to the fixed gear and the rotating gear described in the prior art shown in FIG. In the paper discharge device of the sheet-fed printing machine, the present invention can also be applied to means for moving and adjusting the suction wheel in the direction of the paper. That is, when a spring is used to bias a swinging member that presses the rack toward the pinion side in order to prevent backlash in the rack and the pinion that is mounted on the motor shaft with the motor as the movement adjusting means as the drive source. The structure of the present invention can be applied between the swing member and the spring. Needless to say, the present invention can also be used for devices other than printing machines. The adjustment screw engaging portion 30a is hemispherical and the disk spring has a conical surface. However, the opposite is also possible. In other words, the adjustment screw engaging portion 30a is made of the disk spring when the lever swings. Any structure that can slide on the surface may be used. Further, although the urging force of the disc spring 29 is transmitted to the swing member 28 via the presser 40 and the adjustment screw 30, the disc spring 29 may be directly engaged with the adjustment screw 30. The adjustment screw 30 may be omitted by forming a structure similar to the adjustment screw 30 on the moving member 28. Further, although the disc spring 29 is used as the biasing means, a compression spring may be used, and various design changes are possible.
[0024]
【The invention's effect】
As described above, according to the first aspect of the present invention, since the urging means is not inclined with respect to the urging direction, the moving member can be reliably fixed to the fixed member, and the urging means Since a large load is not applied to the one side portion, the durability of the biasing means can be improved.
[0025]
According to the second aspect of the present invention, since there are two places where the swing member and the biasing means are engaged, the engagement is stable.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a switching device between single-sided printing and double-sided printing in a sheet-fed rotary printing press with a reversing mechanism to which a moving member fixing device according to the present invention is applied.
FIG. 2 is a view taken along arrow II in FIG.
FIG. 3 is a cross-sectional view taken along line III-III in FIG.
4A and 4B are schematic diagrams for explaining the operation of the moving member fixing device according to the present invention, where FIG. 4A is an enlarged view, and FIG. 4B is a schematic diagram showing the overall operation.
FIG. 5 is a sectional view showing a switching device between single-sided printing and double-sided printing in a sheet-fed rotary printing press with a reversing mechanism to which a conventional moving member fixing device is applied.
FIG. 6 is an enlarged schematic view for explaining the operation of a conventional moving member fixing device.
[Explanation of symbols]
6 ... Impression cylinder, 10 ... Claw shaft, 17 ... Single-sided printing cam, 19 ... Double-sided printing cam, 27 ... Air cylinder, 28 ... Swing member, 29 ... Belleville spring, 30 ... Adjustment screw, 30a ... Engagement part 31 ... Pressing member, 33a ... Cam part, 40 ... Presser.

Claims (2)

By urging one end of the oscillating member supported so as to be oscillated by the urging means, the moving member is pressed against and fixed to the fixing member on the other end side of the oscillating member, and the urging means is driven by the driving means. In the moving member fixing device that releases the fixing of the moving member with respect to the fixing member by swinging the swinging member against each other, the portions where the swinging member and the urging means are engaged are tapered and recessed, respectively. The urging means is movably supported in a direction substantially perpendicular to the urging direction, and the urging force is generated when the oscillating member is oscillated by the engagement of the oscillating member and the urging means. The moving member fixing device characterized in that the means moves in a direction substantially perpendicular to the urging direction of the urging means .   2. The moving member fixing device according to claim 1, wherein portions where the swinging member and the biasing means are engaged are formed in a hemispherical shape and a conical shape, respectively.

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