JPH0655501B2 - Adsorption member fixing device for sheet-fed printing press with reversing mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention is a sheet-fed printing press with a reversing mechanism and is capable of phase adjustment by suction holding the paper tail of a paper that is carried while being held by the nail of a double-diameter cylinder. The present invention relates to a suction member fixing device that fixes a suction member to the trunk body side after phase adjustment.

[Conventional technology]

Along with the diversification of printing, various sheet-fed printing presses with a reversing mechanism that can be used for single-sided printing and double-sided printing have been proposed and put into practical use. The cylinder is roughly classified into a single type having a double diameter reversing cylinder and a three type having a transfer cylinder, a reversing cylinder and a double diameter cylinder therebetween.

FIGS. 3 and 4 are cylinder arrangement diagrams shown to explain the printing operation of a sheet-fed printing press with a three-fold reversing mechanism, and FIG. 3 shows the case of single-sided printing. FIG. 4 shows the case of double-sided printing. An outline of the configuration and operation of this type of printing machine will be described below with reference to the same drawing. Below a plate cylinder (not shown), a claw 2 and a claw base 3 are formed obliquely below the blanket cylinder 1 that is in contact with the plate cylinder. An impression cylinder 5 provided with a gripper device 4 (hereinafter, referred to as a claw 4) in an outer peripheral notch is provided with its peripheral surfaces in contact with each other, and a downstream printing unit also has a rubber contacting the plate cylinder. A cylinder 6 and a gripper device 9 (hereinafter, referred to as a claw 9) including a claw 7 and a claw base 8 are provided, and an impression cylinder 10 having a circumferential surface abutting the blanket cylinder 6 is disposed. A reversing mechanism including three rollers, a transfer cylinder 11, a double-diameter cylinder 12, and a reversing cylinder 13, whose peripheral surfaces are in contact with each other, is provided between the two impression cylinders 5 and 10. Of these, the transfer cylinder 11 is a gripper device 1 including a claw 14 and a claw base 15.
6 (hereinafter referred to as claw 16) is provided in the outer peripheral cutout.
Further, the double-diameter cylinder 12 has a double diameter of the transfer cylinder 11 and the like, and at a position where the outer peripheral portion thereof is divided into two equal parts, two sets of gripper claw devices 19, 20 (including a claw 17 and a claw base 18) are provided. Below nails 19 and 2
0) is provided, and two rows of suction heads 21 and 22 as suction members are arranged at positions ahead of the claws 19 and 20 in the body rotation direction by a predetermined angle. A plurality of suction heads 21, 22 are arranged on the outer peripheral portion of the double-diameter cylinder 12 in the axial direction and are movably formed in the circumferential direction. It is configured so that the phase of can be adjusted. Further, in the outer peripheral notch of the reversing cylinder 13, a gripper device (A) 25 (hereinafter referred to as a claw (A) 25) including a claw 23 and a claw base 24, and a gripper including a claw 26 and a claw base 27. A claw device (B) 28 (hereinafter referred to as a claw (B) 28) is arranged adjacent to each other in the circumferential direction. And each torso 1, 5, 11, 1
2, 13, 10, 6 are drivingly connected to each other by gears, and of these, on the end shaft of the reversing cylinder 13, a fixed gear that is fixed to the shaft and a rotatable gear that is fixed to each other are fixed and released. The fixed gear meshes with the gear of the impression cylinder 10, and the rotating gear meshes with the gear of the double diameter cylinder.

With this configuration, in the case of single-sided printing shown in FIG. 3, when each cylinder rotates in the direction of the arrow, the paper 30 is gripped by the claw 4 of the impression cylinder 5 from the paper feeding device through the swing device. Is further gripped by the claws 16 of the transfer cylinder 11 and conveyed, and when the paper 30 passes between the blanket cylinder 1 and the impression cylinder 5, the first color is printed on the surface. The paper 30 includes the nail 16 of the transfer cylinder 11 to the nail 19 of the double-diameter cylinder 12.
The gripper (A) 2 is conveyed by being gripped by the gripper (20), and the pawl 19 and the pawl (A) 25 face each other as shown in the drawing.
It is changed to 5 and conveyed. After this, the paper 30 is further gripped by the claws 9 of the impression cylinder 10 and conveyed, and when passing between the blanket cylinder 6 and the impression cylinder 10, the paper 30 is printed with the second color on the same surface as the first color. It

When shifting from single-sided printing to double-sided printing, the state in which the claw 19 and the claw 25 in FIG. 3 correspond to the state in which the suction head 21 and the claw (B) 28 shown in FIG. 4 correspond to each other. The rotation gear is rotated so that the upstream cylinder group including the double-diameter cylinder 12 is phase-adjusted with respect to the reversing cylinder 13, and the claws 19 and 20 on the double-diameter cylinder 12 and the suction head 21, Two
The relative phase with 2 is adjusted to accommodate changes in paper size.
Further, the positions where the claws 19 and 20 of the double-diameter cylinder 12 release the grip of the paper 30 are changed substantially by the length of the paper 30 in the top-bottom direction between the single-sided printing and the double-sided printing, so that the action position of the paper release cam is adjusted. To do. After performing the switching adjustment in this way, when each cylinder is rotated, the paper 30 having the surface printed thereon is gripped by the claw 19 (20) of the double-diameter cylinder 12 as in the case of single-sided printing. Further, the paper tail is sucked by the suction head 21 (22) and conveyed, and the paper 30 is conveyed until the paper tail reaches the paired contacts of the drums 12, 13 as shown by reference numeral 30A in the figure.
At this time, the opening and closing of the claw (B) 28 and the suction release of the suction head 21 grip the bottom of the paper 30A and at the same time the claw 20 is held.
The gripper is released, and the paper 30A is conveyed by the reversing cylinder 13 with the tail side of the paper 30A ahead. During this transportation, both claws (A) 2
5, (B) 28 opens and closes at a different timing for a moment, and paper 3
0A is gripped by the nail (A) 25 from the nail (B) 28 and conveyed. Then, the claw (A) 25 and the claw 9 of the impression cylinder 10
When and are opposed to each other, the paper 30A is gripped by the nail 9 and conveyed as indicated by reference numeral 30B in the figure. The back surface of the paper 30B contacts the blanket cylinder 6 when passing between the blanket cylinder 6 and the impression cylinder 10, so that the back surface is printed, and the front surface is printed to be double-sided printing. To be done.

As described above, the double-diameter cylinder 12 of the sheet-fed printing press with a three-type reversing mechanism that operates in this manner includes the claws 19 and 20 for holding the leading edge of the paper and the suction head 21 for sucking the bottom of the paper.
22 are provided, and it is necessary to adjust the mutual phase in the circumferential direction when switching between single-sided printing and double-sided printing or when changing the paper size. Therefore, a plurality of grooves extending in the circumferential direction are provided in parallel on the circumferential surface of the body of the body in the axial direction, and a plurality of suction heads supported on the body of the body are engaged by means of some means. Various types of suction member phase adjusting devices have been proposed and used in the related art, in which the suction heads are moved in the groove in the circumferential direction to adjust the phase and then fix the phases.

[Problems to be solved by the invention]

However, in the conventional device of this type, the arms are fixed to the shafts at both ends of the double-diameter cylinder supported by the frames on both sides, and a plurality of suction members are fixed to the shafts connecting the arms to adjust the phase. At that time, a structure is adopted in which the bolts that fix the arms on both sides to the body end shaft are loosened, the phase is adjusted, and then the bolts are tightened and fixed.
Since the arm has to be provided inside the frame on both sides, you have to loosen or tighten the bolts on the inside of the narrow frame and at the two places on both sides each time you adjust the phase.
There is a problem that it takes a lot of labor and a long time for adjustment.

[Means for solving problems]

In order to solve such a problem, in the present invention, a pair of support members respectively supported by both end shafts of the body main body, and an outer peripheral space portion of the body main body are axially penetrated between the support members on both sides. In a sheet-fed printing press with a reversing mechanism including a double-diameter cylinder device having a supported suction member, a support member on both sides is rotatably fitted to the both end shafts, and a flat surface of the support member on the cylinder body side. Is provided in contact with the end face of the body, and a shaft penetrating the body and both end shafts is provided, and the support member and the body body are attached to the side end surface of the support member opposite to the body and move. And a spring member for pressing at least one of the fixing members against the trunk body side.

[Action]

When adjusting the phase of the suction member, if the fixing member is moved, the fixing of the support member to the body of the body is released, and the support member can be rotated. And the phase of the suction member is adjusted. When the fixing member is moved after the adjustment, the supporting member is firmly fixed to the body. During the printing operation, the elongation of the shaft due to the temperature rise is absorbed by the spring member and the fixed state is maintained.

〔Example〕

FIGS. 1 and 2 show an embodiment of a suction member fixing device according to the present invention. FIG. 1 is a vertical sectional view of a double diameter cylinder in which this is implemented, and FIG. 2 is a sectional view taken along line AA of FIG. is there. The cylinder arrangement, the schematic configuration of each cylinder, the printing operation, and the like have been described with reference to FIGS. 3 and 4, so a detailed description thereof will be omitted, and the necessary drawings will be described below with reference to the drawings. . In the drawing, the double-diameter cylinder 12 is provided with a cylindrical main body 31 having a cast-out space portion, and end shafts 32, 33 integrally formed concentrically at both ends thereof,
Both end shafts 32 and 33 are rotatably supported by a frame 36 on both sides via a rolling bearing 35 fitted in a bearing case 34. Reference numerals 37 and 38 are bearing retainers for retaining the outer race of the rolling bearing 35, and 39 is a collar for retaining the inner race. On one end shaft 32, a double-diameter cylinder gear 41 that meshes with the rotating gear 40 on the reversing cylinder 13 side is attached to the bolt 4
The double-diameter body gear 41 and the end shaft 32 are fixed by a spanning ring 44 drawn by a bolt 43. A bearing retainer 45 and a collar 46 are also provided on the other end shaft 33 side.
Then, as described above, the rotating gear 40 is fixed to the fixed gear adjacent to the reversing cylinder 13 side to transmit the rotation, and by releasing the fixation between the fixed gear and the rotating gear 40, the reversing cylinder 40 is released. It is configured so that the phase adjustment between the lens 13 and the double-diameter cylinder 12 is possible.

Side plates 47 formed into a lantern shape when viewed from the front are rotatably fitted to the large diameter portions 32a and 33b of the both end shafts 32 and 33, and these side plates 47 are the core thickness of the body 31 of the body. The inward movement is restricted by coming into contact with the end faces of the portion 31a and the outer peripheral wall portion 31b. The rotatable side plate 47 is fixed to the body 31 by a fixing device described later. An intake pipe 48 is rotatably supported via a bearing 49 at a location that divides the outer peripheral portions of the side plates 47 on both sides in the circumferential direction, and one end of the intake pipe 48 is attached to the side plate 47 on one side. End tube 50 closely fitted to the end portion and the side plate 4 on the opposite side
A base pipe 51 parallel to the intake pipe 48 is supported between the main pipe 51 and the pipe 7. 52 is a bracket which is fixed to the base pipe 51 side and connects the base pipe 51 and the intake pipe 48 at the central portion,
The intake pipe 48 is rotatably supported, and the bracket 52 is provided with a communication hole 53 that connects the source pipe 51 and the intake pipe 48. Reference numeral 54 denotes an annular fixed valve fixed to the frame 36 on one side, and is connected to a vacuum pump as a suction air source (not shown) by a hose or the like, and the end surface thereof is attached to the end pipe 50. An arcuate rotary valve 55 is slidably contacted. The fixed valve 54, the rotary valve 55, and the end pipe 50 are provided with an air passage 56 for communicating the source pipe 51 with a vacuum pump, and when the double-diameter cylinder 12 rotates, the rotary valve 5
The air in the intake pipe 48 is sucked through the feeling 1 and the communication hole 53 only during a predetermined timing when the air passage on the 5th side is in sliding contact with the arc-shaped air passage on the fixed valve 54 side and communicates with it. ing. The suction pipe 48 has a plurality of suction heads 58 as suction members provided with suction ports 57 communicating with the suction pipe 48.
Are fixed in parallel in the axial direction, and the suction port 57 is opened in the peripheral surface of the body 31. Then, the suction head 58 is engaged with a groove 59 extending in the circumferential direction at a predetermined angle in the outer peripheral wall portion 31b of the body 31, and the side plate 4 is attached.
The phase of the claws 19 and 20 and the suction head 58 in the circumferential direction is adjusted by releasing the fixation between the body 7 and the body 31 and rotating the side plate 47. A cam follower 61 corresponding to a cam surface of a cam (not shown) on the frame 36 side is pivotally attached to a roller lever 60 axially attached to a rotary valve 55-side protruding portion of the intake pipe 48, so that the double-diameter cylinder 12 rotates once. When the cam follower 61 contacts the cam surface of the cam, the intake pipe 48 rotates by a predetermined angle via the roller lever 60 and the suction head 58 moves in the groove 59.
It is configured such that the paper tail that is sucked by the suction port 57 is pulled in the vertical direction to make it tense. The reference numeral 62 in FIG. 2 indicates a spring mechanism for pressing the cam follower 61 against the cam surface, and the lever 63 is fixed to the protruding end of the intake pipe 48 on the side opposite to the rotary valve 55, and the lever 63. 6
3 is pivotally attached to the free end portion and the other end is a post 64 on the side plate 47 side.
Is formed by a spring shaft 65 inserted in the spring shaft 65 and a compression coil spring 66 interposed on the spring shaft 65, and the suction head is rotated in cooperation with a cam. 67 is a grease nipple that lubricates the rotation of the intake pipe 48, and 68 is a pin used for driving a print switching device (not shown).

Next, a suction member fixing device for fixing the suction head 58 to the body 31 side through the side plate 47 after adjusting the phase will be described. That is, the large-diameter portions 32a and 33b, which are the bases of the both-end shafts 32 and 33, are provided with presser bar holes 68 diametrically passing through them, and the presser bar holes 68 have a round bar-shaped main part. The presser bar 69 is inserted. This presser bar 69
The main body 69a and a pair of pressers 69b that are detachably bolted to both ends of the main body 69a are formed in relation to the assembly, and a shaft hole 69c is formed in the central portion of the main body 69a. . Further, the center wall portion 31a of the body 31 and the both end shafts 3
Shaft holes 31c, 32c, and 33a are also formed in the central portions of the shaft holes 2 and 33, respectively.
3a, 69c, 31c, 69c, 32c has a fixed shaft 7
0 is inserted through. The fixed shaft 70 is restricted from moving to one side by a nut 71 and a collar 72 that are screwed into one threaded portion, and the screw member 73 that is screwed into the threaded portion at the end is angled. A nut 74 having a hole 74a is fixed, and the nut 74 is restricted from moving in the axial direction by a plate 75 bolted to the double-diameter body gear 41. Then, the screw member 73 and the presser bar 69
A presser pipe 76, a pair of washers 77, and a plurality of disc springs 78 and thrust bearings 79 interposed between the presser pipe 76 and are provided, and by doing so, a spanner is inserted into the square hole 74a of the nut 74. Then, when the nut 74 is tightened, the fixed shaft 70 is attracted by the screw action of the screw member 73, and a surface pressure is applied between the presser 69b and the side plate 47 and the end face of the body main body 31, so that the side plate 47 and the body main body 31 are separated. Is configured to be fixed by this surface pressure. In the present embodiment, a semi-cylindrical surface pressure adjusting member 80 is interposed between the presser 69b and the pressing surface of the side plate 47,
Even if the presser bar 69 bends due to the surface pressure, the surface pressure adjusting member 80
The circular arc surface absorbs this and the surface pressure becomes constant. Reference numeral 81 denotes a click mechanism including a ball that contacts the hexagonal head circumferential surface of the nut 74 and a spring member that pushes the ball, and lightly locks the rotation every time the nut 74 is rotated 60 °. Is configured. It is to be noted that the reference numeral 82 in FIG.
9 (20) is a spring member which is used when adjusting the phase between the suction head 58 and the side plate 47 and is lightly integrated so that the side plate 47 and the body 31 hang around.

The operation of the double diameter barrel device configured as described above will be described.
In the double-sided printing operation described with reference to FIG. 4, the claw 19 (20) of the double-diameter cylinder 12 is held and the paper tail of the paper 30 is placed on both cylinders 1.
When the contact points 1 and 12 are separated, the rotary valve 55 contacts the fixed valve 54, and passes through the air passage 56, the source pipe 51, the communication hole 53, and the intake pipe 48, and the suction port 5 of the suction head 58.
Since the air is sucked from 7, the paper tail of the paper 30 is sucked by the suction port 57. When each body rotates further, the cam follower 6
1 contacts the cam surface and rotates the roller lever 60 against the elastic force of the compression coil spring 66, the intake pipe 48 rotates, and the suction head 58 moves in the groove 59 to move the paper 30. Make you nervous. In this state, the bottom of the paper is the claw (B) 28 of the reversing cylinder 13.
, The rotary valve 55 separates from the fixed valve 54, the suction is stopped and the paper tail is released from the suction by the suction head 58, and the paper 30 is reversed. Be transported. The other double-sided printing operation and the single-sided printing operation have been described above with reference to FIGS. 3 and 4, and the description thereof will be omitted.

Then, when switching between single-sided printing and double-sided printing and changing the paper size, a spanner is inserted into the square hole 74a of the nut 74 and rotated in a direction in which the nut 74 is loosened. Is released from the screw member 73, the surface pressure by the presser 69b is released, and the fixation of the side plate 47 and the body by the surface pressure is released. Therefore, the rotating gear 4
When the fixing of 0 is released and this is rotated via a gear device (not shown), the gear 41 rotates and the body 31 rotates,
Although the side plate 47 is entangled at first, when the suction head 58 reaches a predetermined position for single-sided printing or double-sided printing, the side plate 47 is stopped by a device (not shown), and only the body 31 is rotated thereafter. Stop at the position corresponding to. Then, when the nut 74 is rotated in the tightening direction,
Since the fixed shaft 70 is screwed into the screw hole of the screw member 73 by the screw action of the screw member 73, it is attracted to the presser bar 69 on the opposite side, and the surface pressure by the pressers 69b on both sides is transferred via the surface pressure adjusting member 80. In addition to the side plate 47, the side plate 47 and the body 31 are firmly fixed. In this case, in this embodiment, since the surface pressure adjusting member 80 is provided, even if the pressing bar 69 bends due to the excessively high surface pressure, the presser 69 is pressed.
Since the deformation of b is absorbed by the arc surface of the surface pressure adjusting member 80, the presser 69b is not deformed and the surface pressure is always constant. In addition, even if the fixed shaft 70 expands due to a rise in temperature during operation, in the present device, the disc spring 78
This extension is absorbed by the provision of, and the side plate 47 and the body 31 are not loosely fixed.

〔The invention's effect〕

As is clear from the above description, according to the present invention, a pair of support members respectively supported on both end shafts of the body,
In a sheet-fed printing press with a reversing mechanism, which comprises a double-diameter cylinder device having a suction member that axially penetrates through the outer peripheral space of the cylinder body and is supported between the support members on both sides, the support members on both sides are The support member is rotatably fitted to the both end shafts, and a plane of the support member on the body side of the body is attached to the end surface of the body body to provide a shaft that penetrates the body body and the both end shafts. By providing a fixing member that is attached to the side end surface on the side opposite to the body of the body and fixes the supporting member and the body of the body by movement, and by providing a spring member that presses at least one of the fixing members toward the body of the body. Since the support member of the suction member can be fixed to the trunk body only by rotating the screw member from the outside of the frame on one side where the periphery is open, compared with the conventional two-sided inner frame. Workability is greatly improved and It is possible to measure the reduction of reducing the working time. Further, during the printing operation, the penetrating shaft extends due to an increase in temperature, but since the extension is absorbed by the spring member, the surface pressure does not change and the fixing between the support member and the body is not loosened.

[Brief description of drawings]

1 and 2 show an embodiment of a suction member fixing device of a sheet-fed printing press with a reversing mechanism according to the present invention. FIG. 1 is a longitudinal sectional view of a double-diameter cylinder in which this is implemented, and FIG. 1 is a sectional view taken along the line AA in FIG. 1, FIG. 3 is a cylinder arrangement diagram of a sheet-fed printing press with a reversing mechanism shown for explaining a single-sided printing operation, and FIG. 4 is a sheet with a reversing mechanism shown for explaining a double-sided printing operation. FIG. 3 is a cylinder array diagram of the leaf printing machine. 12 ... double diameter cylinder, 31 ... cylinder body, 31c, 32c, 3
3a ... Shaft hole, 32, 33 ... End shaft, 36 ... Frame, 47 ... Side plate, 48 ... Intake pipe, 58 ... Suction head, 69 ... Presser bar, 69b ... Presser, 70 ...... Fixed shaft, 73 ...... screw member, 74 ...... nut, 78 ...... disc spring.

Claims (1)

[Claims] 1. A body main body whose end shafts are axially supported by both frames, a pair of support members located inside the frame and supported by the respective end shafts, and an outer peripheral space of the body main body. In a sheet-fed printing press with a reversing mechanism, which has a double-diameter cylinder device having an adsorbing member that axially penetrates through and is supported between the supporting members on both sides, the supporting members on both sides are rotated around the both end shafts. A shaft that penetrates the body and both end shafts by freely fitting the flat surface of the body of the support member on the body side of the support member is attached to the end surface of the body, and the support member on the opposite side of the body. A sheet having a reversing mechanism, which is provided with a fixing member which is attached to the side end face and fixes the supporting member and the body of the body by movement, and a spring member which presses at least one of the fixing members against the body of the body. Adsorption member fixing device for printing machines.