JP2799693B2 - Shaft for plate cylinder mounting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate cylinder mounting shaft for supporting both sides of a plate cylinder from both sides.

[0002]

2. Description of the Related Art In order to mount a plate cylinder on a printing press and rotate the plate cylinder, a plate cylinder mounting shaft that supports both sides of the plate cylinder from inside is used. Conventionally, as shown in FIG. 14, mounting of the plate cylinder on the mounting shaft is performed by inserting the mounting shaft 65 into an insertion hole 63 provided in the axial direction of the plate cylinder 62, and both ends of the insertion hole 63 of the plate cylinder 62. Tapered portion 6 conforming to tapered portions 66a, 66b formed on the inner surface of the portion
The taper controls 68a and 68b provided with the taper controls 68a and 68b are inserted from both ends of the mounting shaft 65, and the taper controls 68a and 68b are beaten toward the center of the plate cylinder 62 in the axial direction. 6
7b are fitted into tapered portions 66a, 66b formed on the inner surfaces of both ends of the insertion hole 63 of the plate cylinder 62, respectively, and the both ends of the plate cylinder 62 are supported from inside by a pushing force.

At the time of mounting the plate cylinder on the mounting shaft 65, the two taper controllers 68a, 68 are used to prevent misalignment.
The pressing force of b must be made as uniform as possible to the left and right. However, since the mounting operation of the plate cylinder 62 is performed by tapping the taper con 68, skill is required, and it is inevitable that there is an individual difference in the mounting accuracy of the plate cylinder. Also, both taper controls 68a,
Workability was very poor because adjustment was made to make the pushing force of 68b as uniform as possible to the left and right.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a shaft for attaching a plate cylinder to a plate cylinder, which can improve the mounting accuracy of the plate cylinder to the shaft and can be easily attached to and detached from the shaft of the plate cylinder. It is in.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a shaft for mounting a plate cylinder according to the present invention has two support portions for supporting both sides of the plate cylinder from both sides from the inside of a cylindrical outer cylinder shaft. And a center shaft is arranged so as to coincide with the axis of the outer cylinder shaft, and the center shaft is provided so as to be able to advance and retreat a predetermined distance in the axial direction of the outer cylinder shaft with respect to the outer cylinder shaft. A plurality of inner sleeves provided rotatably around the axis with respect to the outer cylinder shaft, the diameter of which is expandable and contractable, and the outer surface of which is tapered; The center shaft is provided on the center shaft so as to be movable in directions opposite to each other with the rotation of the center shaft in the axial direction. A plurality of outer sleeve tapered fit to the surface, provided on the outer cylinder shaft, characterized in that the two supporting portions formed by said plurality of outer sleeve and the plurality of inner sleeve.

By rotating the center shaft about the axis of the outer cylinder shaft, the inner sleeves fitted on the outer cylinder shaft are moved in opposite directions in the axial direction of the outer cylinder shaft. Push the inner sleeve into the outer sleeve and fit it.

When the inner sleeve is fitted to the outer sleeve, the diameter of the outer sleeve is expanded, and the outer sleeve presses the both ends of the plate cylinder from inside, thereby supporting the both ends of the plate cylinder from inside. .

When the inner side near one end of the plate cylinder is supported by the outer sleeve of the support portion on one end side of the shaft for mounting the plate cylinder before the inner side nearer the other end, the center shaft is moved relative to the outer cylindrical shaft. By moving toward the other end of the outer cylinder shaft in the axial direction, the degree of engagement of the inner sleeve with the outer sleeve is reduced at the support portion on one end side of the plate cylinder mounting shaft, while the plate cylinder mounting shaft is In the support portion on the other end side, the degree of fitting of the inner sleeve to the outer sleeve is increased.

After the center shaft is moved relative to the outer cylinder shaft toward the other end in the axial direction of the outer cylinder shaft, the center shaft is again rotated about the axis of the outer cylinder shaft, so that the outer portions of the two support portions are removed. The sleeve is used to adjust the pressing force on the inner side near the both ends of the plate cylinder.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing one embodiment of a plate cylinder mounting shaft of the present invention. The plate cylinder mounting shaft 1 has a cylindrical outer cylinder shaft 2 and a center shaft 3 and an outer cylinder shaft 2 arranged inside the outer cylinder shaft 2 so as to coincide with the axis of the outer cylinder shaft 2. Both support portions 4a and 4b are provided on the peripheral surface of the central portion near the one end in the axial direction and on the peripheral surface near the other end of the outer cylindrical shaft 2 for supporting the both ends of the plate cylinder from inside, respectively.

The center shaft 3 is provided so as to advance and retreat in the axial direction of the outer cylinder shaft 2 by a predetermined distance with respect to the outer cylinder shaft 2 and is rotatable around the axis with respect to the outer cylinder shaft 2. It is provided in. In addition, a support portion 4a provided on a peripheral surface near one end of the center portion of the outer cylindrical shaft 2
Is a support portion 4b formed of an inner sleeve 5 and an outer sleeve 6 and provided on a peripheral surface near the other end of the outer cylindrical shaft 2.
Is constituted by an inner sleeve 7 and an outer sleeve 8.

Next, each element constituting the plate cylinder mounting shaft 1 will be described.

First, the outer cylinder shaft 2 will be described.
As shown in FIG. 5, four concave portions 9 are provided at intervals of 90 degrees in a circumferential direction on a peripheral surface near one end of the outer cylindrical shaft 2 corresponding to the support portion 4a. A screw hole 10 is provided. As shown in FIG. 6, four guide grooves 11 are provided in the circumferential direction at intervals of 90 degrees in the circumferential direction on the peripheral surface near the center of the outer cylindrical shaft 2 corresponding to the support portion 4a, At the bottom of each guide groove 11,
Each of the rectangular holes 12 is provided in the longitudinal direction.

Similarly, four recesses 13 are provided at intervals of 90 degrees in the circumferential direction on the peripheral surface near the other end of the outer cylindrical shaft 2 corresponding to the support portions 4b. Is provided with a screw hole 14. As shown in FIG. 7, four guide grooves 15 are provided in the circumferential direction on the peripheral surface near the center of the outer cylindrical shaft 2 corresponding to the support portions 4 b at intervals of 90 degrees in the circumferential direction, Each guide groove 15
Are provided with rectangular holes 16 extending in the longitudinal direction.

As shown in FIG. 4, a cylindrical member 17 is fixed to a central peripheral surface of the outer cylindrical shaft 2 between the supporting portion 4a and the supporting portion 4b. , FIG. 2
As shown in FIG. 3, a retainer supporting concave portion 18 is formed, and an annular flange 19 is integrally formed on the peripheral surface of the other end of the outer cylindrical shaft 2 so as to protrude in the radial direction as shown in FIG.

Next, the center shaft 3 will be described. As shown in FIG. 1, the center shaft 3 is provided inside the outer cylinder shaft 2 via a retainer 20.
Are arranged so as to coincide with the axis.

As shown in FIG. 1, a rotating rod portion 21 having a smaller diameter than the center shaft 3 and having a hexagonal cross section is integrally provided on one end surface of the center shaft 3, and a retainer 20 is provided. A flange 22 having a diameter larger than the diameter of the center shaft 3 is formed near one end of the center shaft 3 that is inserted inside the center shaft 3.

As shown in FIG. 2, an annular convex portion 23 is formed near the middle of the retainer 20 toward the center in the radial direction of the retainer 20, and a thrust bearing 24 is provided inside the retainer 20 from the other end of the retainer 20. Race 2 on one end
5 is in contact with the other end surface of the annular projection 23, and the center shaft 3 is inserted through the retainer 20 and the thrust bearing 24 from one end side thereof. A distance a is provided between the races 26 at the end, and a thrust bearing 27 is inserted through the center shaft 3 from the other end of the retainer 20, and a race 28 at one end of the thrust is spaced from the flange 22 of the center shaft 3 by a distance b. Opened and placed in the retainer 20, a retaining ring 29 is fitted inside the retainer 20 from the other end of the retainer 20, and the retaining ring 29 prevents the race 30 on the other end of the thrust bearing 27 from coming off. ing.

As a result, the center shaft 3 can move forward and backward by a predetermined distance in the axial direction of the center shaft 3 with respect to the retainer 20, that is, the thrust bearing 24
The distance a between the race 26 and the flange 22 and the distance b between the race 28 of the thrust bearing 27 and the flange 22, in other words, the distance a + b, are provided so as to be movable forward and backward.

As shown in FIG. 2, one end of the center shaft 3 projects from one end of the annular projection 23 of the retainer 20, and a radial bearing 31 is attached to one end of the center shaft 3 from one end of the retainer 20. The retainer 20 is fitted into the retainer 20 from one end, and the retaining ring 32 is fitted inside the retainer 20 near one end thereof. The retaining ring 32 prevents the radial bearing 31 from coming off. As a result, the center shaft 3 is
It is provided so as to be rotatable with respect to.

As shown in FIGS. 1 and 4, a right-hand thread 33 is provided at the center of the center shaft 3, and a column-shaped nut 34 is screwed to the right-hand thread 33. At the end, a left-hand thread 35 opposite to the right-hand thread 33 provided at the center of the center shaft 3 is provided, and a column-shaped nut 36 is screwed to the left-hand thread 35. Therefore, the nut 34 and the nut 36 are provided on the center shaft 3 so as to be movable in opposite directions in the axial direction of the center shaft 3 as the center shaft 3 rotates.

As shown in FIGS. 6 and 7, four concave portions 37 are provided at intervals of 90 degrees in the circumferential direction on the peripheral surfaces of the nuts 34 and 36, respectively. A screw hole 38 is provided.

As shown in FIG. 2, the center shaft 3 has the other end of the center shaft 3 inserted through an opening on one end side of the outer cylinder shaft 2, and a retainer support recess 18 provided near one end of the outer cylinder shaft 2. The retainer ring 39 is fitted into one end of the outer cylinder shaft 2 from one end of the outer cylinder shaft 2, and is inserted into the outer cylinder shaft 2 via the retainer 20 at the axis of the outer cylinder shaft 2. They are arranged in agreement.

Therefore, the center shaft 3 is provided so as to be able to move forward and backward by a certain distance with respect to the outer cylinder shaft 2 in the axial direction of the outer cylinder shaft 2, that is, by a distance a + b. And is rotatably provided around the axis of the outer cylinder shaft 2.

Next, the inner sleeves 5, 7 and the outer sleeves 6, 8 constituting the support portions 4a and 4b will be described. Since the inner sleeve 5 and the inner sleeve 7 have the same shape and the outer sleeve 6 and the outer sleeve 8 have the same shape, the inner sleeve 5 and the outer sleeve 6 will be described.

The inner sleeve 5 has a diameter of the outer cylindrical shaft 2.
Is formed slightly larger than the outer diameter of. As shown in FIG. 8, on the outer surface of the inner sleeve 5, a tapered portion 40 which is thicker in the radial direction from one end of the inner sleeve 5 toward the other end is formed, and as shown in FIG. A slot 41 is provided from one end of the inner sleeve 5 toward the other end, and a small hole 42 slightly larger than the width of the slot 41 is formed at the end of the slot 41. A slot 43 parallel to the slot 41 is provided at an interval from the other end of the inner sleeve 5 toward one end, and a small hole 44 slightly larger than the width of the slot is provided at the end of the slot 43. Has been drilled.

As shown in FIG. 6, a total of four sets of slits 41 and 43 are formed in the circumferential direction.
It is provided at intervals of each degree, and the total of 4
The set of slits 41 and 43 allow the inner sleeve 5 to expand and contract in the radial direction. As shown in FIGS. 6 and 8, near the other end of the inner sleeve 5, at a position substantially 45 degrees from the position where the sets of slits 41 and 43 are provided, every 90 degrees in the circumferential direction. At intervals of four through holes 45
Is provided.

The outer diameter of the outer sleeve 6 is slightly larger than the outer diameter of the outer cylinder shaft 2 and, as shown in FIG.
The inner surface of the outer sleeve 6 is formed with a tapered portion 46 adapted to the outer surface of the inner sleeve 5 which becomes thicker in the radial direction from the other end of the outer sleeve 6 toward one end.

As shown in FIG. 9, a slot 47 is provided on the outer sleeve 6 from the other end of the outer sleeve toward one end, and the end of the slot 47 is slightly smaller than the width of the slot. A large hole 48 is formed, and a slot 49 is provided from the one end of the outer sleeve 6 toward the other end of the outer sleeve 6 at an appropriate distance from the slot 47 and in parallel with the slot 47. A small hole 50 slightly larger than the width of the slit 49 is formed in the slit.

As shown in FIG. 5, a total of four sets of slits 47 and 49 are formed as one set.
It is provided at intervals of each degree, and the total of 4
The pair of slits 47 and 49 allow the outer sleeve 6 to expand and contract in the radial direction. As shown in FIGS. 5 and 9, near one end of the outer sleeve 6, a position that is approximately 45 degrees from the position where the sets of slits 47 and 49 are provided is set at every 90 degrees in the circumferential direction. 4 holes 51 at intervals
Is provided.

Next, the support portion 4a will be described. As shown in FIG. 2, the inner sleeve 5 has one end of the inner sleeve 5 which is the tip of the tapered portion 40 facing one end of the outer cylinder shaft 2, and as shown in FIG. 11, the four through-holes 45 of the inner sleeve coincide with each other, and are externally fitted to the outer cylindrical shaft 2, and are inserted through the spacers 52 for positioning the inner sleeve 5 inserted into the four through-holes 45 of the inner sleeve 5. It is positioned on the outer peripheral surface of the cylindrical shaft 2.

As shown in FIG. 10, the spacer 52 is formed in a cylindrical shape having a diameter slightly smaller than the diameter of the through hole 45 of the inner sleeve 5 and the width of the guide groove 11 provided in the outer cylinder shaft 2. The width of the square hole 12 provided in the guide groove 11 of the outer cylindrical shaft 2 and the peripheral surface of the nut 34 screwed to the center shaft 2. And a leg portion 54 having a diameter slightly smaller than that of the recessed portion 37.
And a bolt insertion hole 56 in the axial direction of the spacer 52.

To attach the spacer 52 to the nut 34 screwed to the center shaft 2, the leg portion 54 of the spacer 52 is inserted through the through hole 45 of the inner sleeve 5.
4 is inserted into a guide groove 11 provided in the outer cylinder shaft 2 and a square hole 12 provided in the guide groove
When the lower end of the spacer 52 is fitted into the concave portion 37 provided on the peripheral surface of the nut 34 screwed to the center shaft 2, the spacer 52
The head 53 is fitted in the through hole 45 of the inner sleeve 5 and the lower side of the peripheral surface of the head 53 is fitted in the guide groove 11. Next, a bolt 57 is inserted through the bolt insertion hole 56 of the spacer 52, and the tip of the bolt 57 is screwed into a screw hole 38 provided in the recess 37 of the nut 34, and the spacer 52 is inserted.
Is fixed to a nut 34 screwed to the center shaft 3. The head 57 a of the bolt 57 is housed in a circular recess 55 provided in the head 53 of the spacer 52.

The outer sleeve 6 in the support portion 4a is
As shown in FIG.
The other end of the inner sleeve 5 is directed toward the center of the outer cylindrical shaft 2, and the tapered portion 4 inside the outer sleeve 6 is provided outside the tapered portion 40 of the inner sleeve 5.
6 overlap with each other, and as shown in FIG.
The four recesses 9 of the outer sleeve are aligned with the four through-holes 51 of the outer sleeve, and are externally fitted to the outer cylinder shaft 2, and the spacers 58 for fixing the outer sleeve 6 inserted into the four through-holes 51 of the outer sleeve, respectively. The outer cylindrical shaft 2 is fixed to the outer peripheral surface of the outer cylindrical shaft 2.

As shown in FIG. 5, the spacer 58 is formed to have a slightly smaller diameter than the diameter of the through hole 51 of the outer sleeve 6 and the diameter of the concave portion 9 provided in the outer cylinder shaft 2. A circular recess 60 for receiving a head 59 a of the bolt 59 is provided inside, and a bolt insertion hole 61 is provided in the axial direction of the spacer 58.

The spacer 58 is attached to the outer cylinder shaft 2 by inserting the spacer 58 through the through hole 51 of the outer sleeve 6 and fitting it into the recess 9 provided in the outer cylinder shaft 2. The side is fitted inside the through hole 51 of the outer sleeve 6, and the lower side of the spacer 58 is fitted into the recess 9. Next, the bolt 59 is inserted through the bolt insertion hole 61 of the spacer 58, and the tip of the bolt 59 is screwed into the screw hole 10 provided in the concave portion 9 of the outer cylinder shaft 2 to fix the spacer 58 to the outer cylinder shaft 2. . The head 59a of the bolt 59 is accommodated in a circular recess 60 provided in the spacer 58.

Next, the support portion 4b will be described. As shown in FIG. 3, the inner sleeve 7 has one end of the inner sleeve 7 which is the tip of the tapered portion 40 facing the other end of the outer cylinder shaft 2, and as shown in FIG. The four through-holes 45 of the inner sleeve 7 are aligned with the grooves 15 and are externally fitted to the outer cylinder shaft 2.
Are positioned on the outer peripheral surface of the outer cylinder shaft 2 via the positioning spacers 52 of the inner sleeve 7 respectively inserted into the inner sleeve 7. The attachment of the spacer 52 to the nut screwed to the center shaft 2 is the same as that of the support portion 4a, and thus the description is omitted.

The outer sleeve 8 in the support portion 4b is
As shown in FIG.
The other end of the outer sleeve 8 is directed toward the center of the outer cylinder shaft 2, and the tapered portion 4 inside the outer sleeve 8 is provided outside the tapered portion 40 of the inner sleeve 7.
6 overlap with each other, the four through-holes 51 of the outer sleeve coincide with the four recesses 9 of the outer cylindrical shaft 2, and are fitted to the outer cylindrical shaft 2 so as to be inserted into the four through-holes 51 of the outer sleeve. The sleeve 8 is fixed to the outer peripheral surface of the outer cylindrical shaft 2 via a fixing spacer 58. The spacer 5
8 is attached to the outer cylinder shaft 2 in the same manner as the support portion 4a, and the description is omitted.

As is clear from FIGS. 1, 2 and 3, the outer sleeve 6 of the support portion 4a and the outer sleeve 8 of the support portion 4b are arranged such that the distal ends of the tapered portions 46 are located on the center side of the outer cylinder shaft 2. And is fixed to the outer cylinder shaft 2.

As is apparent from FIGS. 1, 2 and 3, the inner sleeve 5 of the support portion 4a and the inner sleeve 7 of the support portion 4b are formed such that the distal ends of the tapered portions 40 are opposite to each other. The nut 34 screwed to the center of the center shaft 3 via the positioning spacer 52 and the nut 36 screwed to the other end of the center shaft 3 are engaged with each other. Accordingly, as the nut 34 and the nut 36 rotate with the rotation of the center shaft 3, the center shaft 3
Are provided on the center shaft 3 so as to be movable in directions opposite to each other in the axial direction, so that the inner sleeve 5 of the support portion 4a and the inner sleeve 7 of the support portion 4b
Are provided on the center shaft 3 so as to be movable in opposite directions along with the rotation of the center shaft 3 in the axial direction.

The operation of the plate cylinder mounting shaft 1 configured as described above will be described.

First, the plate cylinder 62 is inserted outside the plate cylinder mounting shaft 1. As shown in FIGS. 2 and 3, the outer cylindrical shaft 2 of the plate cylinder mounting shaft 1 is inserted into the insertion hole 63 of the plate cylinder 62 from one end of the plate cylinder mounting shaft 1.
The end surface 62a of the plate cylinder 62 is brought into contact with the annular flange 19 provided on the peripheral surface at the other end of the outer cylinder shaft 2. In this state, both support portions 4a and 4b of the outer cylinder shaft 2 are located near both ends of the insertion hole 62 of the plate cylinder.

Next, an impact wrench (not shown) is attached to a rotating rod 21 provided on one end surface of the center shaft 3, and the rotating rod is indicated by an arrow x in FIGS. Rotate in the direction. When the rotating rod portion 21 of the center shaft 3 is rotated clockwise, the center shaft 3 is rotated clockwise as indicated by an arrow x in FIGS. Is rotated in the screwing direction.

When the center shaft 3 is turned in the direction in which the right screw is screwed, the right screw 33 formed in the center of the center shaft 3 is turned in the screwing direction. The fitted nut 34 is moved toward one end of the center shaft 3,
That is, in FIG. 2, it is moved to the left.

At the same time, when the center shaft 3 is rotated in the direction in which the right screw is screwed, as shown in FIG. 3, a left screw portion 35 formed near the other end of the center shaft 3 is formed.
Is rotated in the direction opposite to the screwing direction,
The nut 36 screwed to the left threaded portion 35 is moved toward the other end of the center shaft 3, ie,
In FIG. 3, it is moved rightward.

As the center shaft 3 rotates, the nut 34 and the spacer 52 fixed to the nut 34 are guided by the guide groove 11 of the outer cylinder shaft 2 and are moved leftward in FIG. The head 53 of the spacer 52 is fitted in the through hole 45 of the inner sleeve 5 of the support portion 4a, so that the inner sleeve 5 of the support portion 4a is fixed to the outer cylinder shaft 2. Is moved to the left in FIG.

The inner side of the outer sleeve 6 of the support 4a in which the inner sleeve 5 of the support 4a is fixed to the outer cylinder shaft 2 is shown in FIG.
At the same time, the nut 3 is moved to the left.
The spacer 52 fixed to the nut 6 and the nut 36 is guided by the guide groove 15 of the outer cylinder shaft 2 and is moved rightward in FIG. 3, and the spacer 52 is inserted into the through hole 45 of the inner sleeve of the support portion 4b. Since the head 53 is fitted inside, the inner sleeve 7 of the support 4b is moved rightward in FIG. 3 inside the outer sleeve 8 of the support 4b fixed to the outer cylinder shaft 2.

The inner sleeve 5 of the support portion 4a is fixed to the outer cylinder shaft 2 inside the outer sleeve 6 of the support portion 4a as shown in FIG.
As the tapered portion 40 formed on the outer surface of the inner sleeve 5 conforms to the tapered portion 46 formed on the inner surface of the outer sleeve 6, the inner sleeve 5 As the inner sleeve 5 is pushed in and fitted, the diameter of the tapered portion 46 of the outer sleeve 6 is pressed in the expanding direction by the tapered portion 40 of the inner sleeve 5, and the slits 47, 47 formed on the outer sleeve 6 shown in FIG. The diameter of the outer sleeve 6 is expanded by the action of 49, and the outer sleeve 6 is pressed against the inner surface of the supported portion 64a of the insertion hole 63 of the plate cylinder 62 to support one end of the plate cylinder 62 from inside (see FIG. 11). The movement of the inner sleeve 5 with respect to the outer sleeve 6 is performed by the tapered portion 40 of the inner sleeve 5.
When the distal end of the outer sleeve 6 comes into contact with the proximal end of the tapered portion 46 of the outer sleeve 6, the movement is restricted and stopped.

The inner sleeve of the support portion 4b is fixed to the outer cylinder shaft.
As the tapered portion 40 formed on the outer surface of the inner sleeve 7 conforms to the tapered portion 46 formed on the inner surface of the outer sleeve 8, the inner sleeve 7 The diameter of the tapered portion 46 of the outer sleeve 8 is pressed in the expanding direction by the tapered portion 40 of the inner sleeve 7, and the slits 47, 49 formed on the outer sleeve 8 act. The diameter of the outer sleeve 8 is expanded, and the outer sleeve 8 is pressed against the inner surface of the supported portion 64b of the insertion hole 63 of the plate cylinder 62 to support the other end of the plate cylinder 62 from inside (see FIG. 11). The movement of the inner sleeve 7 with respect to the outer sleeve 8 is stopped when the distal end of the tapered portion 40 of the inner sleeve 7 contacts the base end of the tapered portion 46 of the outer sleeve 8.

Incidentally, the diameter of the insertion hole 63 of the plate cylinder 62 is
Due to a manufacturing error of the plate cylinder 62, the inner diameter of the supported portion 64a at one end of the insertion hole 63 and the inner diameter of the supported portion 64b at the other end slightly vary. Therefore, the support portions 4a and 4b do not always support the inside of the plate cylinder 62 almost simultaneously.

While rotating the rotating rod portion 21 of the plate cylinder mounting shaft 1 in the clockwise direction, the support portion 4b at the other end is pressed against the supported portion 64b at the other end of the plate cylinder 62, and Torso 62
Before the other end of the plate cylinder 6 is supported from the inside, the support portion 4a presses against the supported portion 64a on one end side of the
When one end of the center shaft 2 is supported from the inside, in this case, the movement of the nut 34 to the left with respect to the center shaft 3 is restricted, and the rotation of the center shaft 3 is stopped. The expansion of the diameter of 8 stops (see FIG. 12).

However, the supported portion 64b at the other end of the plate cylinder 62 is not yet supported by the support portion 4b of the plate cylinder mounting shaft 1, and at this time, the center shaft 3 of the plate cylinder mounting shaft 1 is not supported. By hitting one end, the center shaft 3 is moved rightward in the axial direction indicated by the arrow y in FIG.

When one end of the center shaft 3 of the plate cylinder mounting shaft 1 is hit, the center shaft 3
It moves rightward in the axial direction of the outer cylinder shaft 2 with respect to the outer cylinder shaft 2. The distance that the center shaft 3 can move to the right in the axial direction of the outer cylindrical shaft 2 is within a range b between the flange 22 of the center shaft 3 and the race 28 on one end of the thrust bearing 27.

At the same time as the center shaft 3 moves to the right in the axial direction, the nut 34 screwed to the right thread 33 and the nut 36 screwed to the left thread 35 of the center shaft 3 And the inner sleeve 5 of the support portion 4a engaged with the spacer 52 integral with the nut 34, and the support portion 4b engaged with the spacer 52 integral with the nut 35. The inner sleeve 7 is moved rightward, and in the support portion 4a, the inner sleeve 5 is moved in the direction in which the inner sleeve 5 is pulled out with respect to the outer sleeve 6, so that the diameter of the outer sleeve 6 is reduced, and The degree of fitting of the sleeve 5 is loosened, and the support portion 4a
The pressing force on the supported portion 64a at one end of the plate cylinder 62 is reduced, while the outer sleeve 8 is supported on the supporting portion 4b.
Is moved in the direction in which the inner sleeve 7 is fitted to the outer sleeve 8, the degree of fitting of the inner sleeve 7 to the outer sleeve 8 is increased, the diameter of the outer sleeve 8 is expanded, and
The pressing force on the supported portion 64b at the other end of the plate cylinder 62 increases.

After hitting one end side of the center shaft 3 of the plate cylinder mounting shaft 1, the turning rod portion 21 of the center shaft 3 is turned clockwise again, and the center shaft 3 is moved to FIG. 2 and FIG. In FIG. 3, a clockwise rotation as indicated by an arrow x, that is, a right-handed screw is rotated to adjust the pressing force of the support portion 4a and the support portion 4b to the inside of the plate cylinder 62.

Before the support portion 4a presses against the supported portion 64a on one end side of the plate cylinder 62 to support one end of the plate cylinder 62 from the inside, the support portion 4b on the other end side is pressed by the plate cylinder 62. In this case, the nut 36 is restricted from moving in the right direction with respect to the center shaft 3 by pressing against the supported portion 64b at the other end of the plate cylinder 62 from the inside. Is stopped, the expansion of the diameter of the outer sleeve 6 on the support portion 4a side is stopped (FIG. 1).
3).

However, a supported portion 64 at one end of the plate cylinder 62 is supported.
a is not yet supported by the support portion 4a of the plate cylinder mounting shaft 1, and at this time, the center shaft 3 is hit by the other end of the center shaft 3 of the plate cylinder mounting shaft 1 so that the center shaft 3 of FIG. Is moved to the left in the axial direction indicated by arrow z. Alternatively, the center shaft 3 is moved relative to the outer cylinder shaft 2 leftward in the axial direction by hitting the outer cylinder shaft 2 to the right as indicated by an arrow p in FIG.

When the other end of the center shaft 3 of the plate cylinder mounting shaft 1 is hit, the center shaft 3
The outer cylinder shaft 2 moves to the left in the axial direction of the outer cylinder shaft 2. The distance that the center shaft 3 can move to the left in the axial direction of the outer cylindrical shaft 2 is within a range a between the flange 22 of the center shaft 3 and the race 26 on the other end of the thrust bearing 24.

Simultaneously with the movement of the center shaft 3 to the left in the axial direction, a nut 34 screwed into the right thread 33 and a nut 36 screwed into the left thread 35 of the center shaft 3 And the inner sleeve 5 of the support portion 4a engaged with the spacer 52 integral with the nut 34, and the support portion 4b engaged with the spacer 52 integral with the nut 35. The inner sleeve 7 is moved to the left, and in the support portion 4a, the inner sleeve 5 is moved in the direction in which the inner sleeve 5 is fitted to the outer sleeve 6, so that the degree of fitting of the inner sleeve 5 to the outer sleeve 6 is improved. And the diameter of the outer sleeve 6 is increased, and the pressing force of the support portion 4a against the supported portion 64a at one end of the plate cylinder 62 is increased. Is moved in the direction in which the outer sleeve 8 is removed, the diameter of the outer sleeve 8 is reduced, the degree of fitting of the inner sleeve 7 to the outer sleeve 8 is loosened, and the supported portion of the support portion 4a on the other end side of the plate cylinder 62 is loosened. The pressing force on the pressure 64b is reduced.

After the other end of the center shaft 3 of the plate cylinder mounting shaft 1 is hit, the turning rod portion 21 of the center shaft 3 is again turned clockwise, and the center shaft 3 is moved in FIG. In FIG. 3, as indicated by an arrow x, the clockwise rotation is performed, that is, the right-hand screw is screwed in, and the pressing force of the support portion 4a and the support portion 4b to the inside of the plate cylinder 62 is adjusted.

As described above, when the inner diameter of the supported portion 64a at one end of the insertion hole 63 and the inner diameter of the supported portion 64b at the other end are slightly varied due to a manufacturing error of the plate cylinder 62. However, since the outer sleeves 6 and 8 of the support portions 4a and 4b can adjust the pressing force toward the inside of both ends of the plate cylinder 62, the both ends of the plate cylinder 62 can be adjusted with even force. The plate cylinder 62 can be supported from the inside, so that the mounting accuracy of the plate cylinder 62 to the shaft 1 can be improved.

When the plate cylinder 62 is to be removed from the plate cylinder mounting shaft 1, the nut 34 and the nut 3 are rotated by rotating the rotating rod 21 counterclockwise in FIG.
6 is moved toward the middle of the center shaft 3 in the axial direction, the inner sleeve 5 of the support portion 4a is moved in a direction to come off from the outer sleeve 6, and the inner sleeve 7 of the support portion 4b is moved.
Is moved in the direction in which the plate cylinder 62 comes out of the outer sleeve 8, thereby releasing the pressing force of the support portion 4a and the support portion 4b against the supported portions 64a and 64b of the plate cylinder 62.

[0063]

According to the plate cylinder mounting shaft of the present invention,
By rotating the center shaft about the axis of the outer cylinder shaft, the inner sleeve externally fitted to the outer cylinder shaft is moved in directions opposite to each other in the axial direction of the outer cylinder shaft, and the outer sleeve provided on the outer cylinder shaft is moved. By fitting the inner sleeve into the outer sleeve, the diameter of the outer sleeve is expanded by the fitting of the inner sleeve to the outer sleeve, and the outer sleeve presses the both ends of the plate cylinder from both sides from the inside. In this way, both ends of the plate cylinder can be supported from the inside.

Even if the inner diameter of the supported portion at one end of the insertion hole and the inner diameter of the supported portion at the other end are slightly different due to a manufacturing error of the plate cylinder, one end of the plate cylinder may be used. When the inner side is supported by the outer sleeve of the support portion on one end side of the plate cylinder mounting shaft before the inner side closer to the other end, the center shaft is aligned with the axial center of the outer cylindrical shaft with respect to the outer cylindrical shaft. By moving toward the other end of the direction,
That is, by moving the center shaft in the axial direction toward the side where the plate cylinder is not supported, at the support portion on one end side of the plate cylinder mounting shaft, while loosening the degree of fitting of the inner sleeve to the outer sleeve, In the support portion on the other end side of the plate cylinder mounting shaft, the degree of engagement of the inner sleeve with the outer sleeve can be increased, and the center shaft is directed toward the other end in the axial direction of the outer cylinder shaft with respect to the outer cylinder shaft. Then, by rotating the center shaft around the axis of the outer cylinder shaft again, it is possible to adjust the pressing force of the outer sleeves of both support portions toward the inside of both ends of the plate cylinder, Both sides of the plate cylinder can be supported with equal force from the inside, so that the mounting accuracy of the plate cylinder to the shaft can be improved, and the plate cylinder is mounted to the shaft. Fine removal can be easily performed because it is only necessary to rotate the center shaft can be realized improvement in work efficiency.

[Brief description of the drawings]

FIG. 1 is an axial sectional view of a plate cylinder mounting shaft according to an embodiment of the present invention.

FIG. 2 is an axial sectional view showing a main part of a plate cylinder mounting shaft when the plate cylinder is mounted.

FIG. 3 is an axial sectional view showing a main part of a plate cylinder mounting shaft when the plate cylinder is mounted.

FIG. 4 is an axial sectional view showing a main part of a plate cylinder mounting shaft.

FIG. 5 is a radial cross-sectional view showing the plate cylinder mounting shaft of FIG. 1 cut along line AA.

FIG. 6 is a radial cross-sectional view showing the plate cylinder mounting shaft of FIG. 1 cut along line BB.

FIG. 7 is a radial sectional view showing the plate cylinder mounting shaft of FIG. 1 cut along line CC.

FIG. 8 is an axial sectional view of the inner sleeve.

FIG. 9 is an axial sectional view of the outer sleeve.

FIG. 10 is a partial cross-sectional view showing positioning of an inner sleeve with respect to a nut screwed on a center shaft.

FIG. 11 is an axial sectional view showing a main part of a plate cylinder mounting shaft when the plate cylinder is supported.

FIG. 12 is an axial cross-sectional view showing a main part of a plate cylinder mounting shaft when one side (one end side) of the plate cylinder is supported.

FIG. 13 is an axial cross-sectional view showing a main part of a plate cylinder mounting shaft in a state where one side (the other end side) of the plate cylinder is supported.

FIG. 14 is an axial sectional view showing a conventional mounting shaft when the plate cylinder is supported.

[Explanation of symbols]

 Reference Signs List 1 plate cylinder mounting shaft 2 outer cylinder shaft 3 center shaft 4a support portion 4b support portion 5 inner sleeve 6 outer sleeve 7 inner sleeve 8 outer sleeve 9 recess 10 screw hole 11 guide groove 12 square hole 13 recess 14 screw hole 15 guide groove Reference Signs List 16 square hole 17 cylindrical member 18 retainer supporting concave portion 19 annular flange 20 retainer 21 rotating rod portion 22 flange 23 annular convex portion 24 thrust bearing 25 race 26 race 27 thrust bearing 28 race 29 holding ring 30 race 31 radial bearing 32 holding ring 33 Right thread part 34 Nut 35 Left thread part 36 Nut 37 Recessed part 38 Screw hole 39 Retainer ring 40 Taper part 41 Slot 42 Small hole 43 Slot 44 Small hole 45 Through hole 46 Taper part 47 Slot 48 Small hole 49 Slot 50 Small hole 51 Through hole 52 Spacer 53 Head 54 Leg 55 Circular recess 56 Bolt insertion hole 57 Bolt 58 Spacer 59 Bolt 60 Circular recess 61 Bolt insertion hole 62 Plate cylinder 63 Insertion hole 64a Supported portion 64b Supported portion 65 Mounting shaft (conventional) 66 Taper 67 Taper 68 Taper

Claims (1)

(57) [Claims] 1. A plate cylinder mounting shaft in which both support portions for supporting both sides of a plate cylinder from both sides are provided on a peripheral surface of a cylindrical outer cylinder shaft, wherein the center is aligned with the axis of the outer cylinder shaft. A shaft is arranged, and the center shaft is provided so as to be movable forward and backward by a fixed distance in the axial direction of the outer cylinder shaft with respect to the outer cylinder shaft, and is rotatable around the axis with respect to the outer cylinder shaft. A plurality of inner sleeves whose diameters are expandable and contractable and whose outer surface is tapered are fitted on the outer cylinder shaft, and are opposite to each other with the rotation of the center shaft in the axial direction of the outer cylinder shaft. Provided on the center shaft movably to, a plurality of tapered outer sleeves whose inner surface is expandable and contractible and the inner surface of which is fitted and disengaged with the plurality of inner sleeves is adapted to the outer surface of the inner sleeve, A plate cylinder mounting shaft provided on the outer cylinder shaft, wherein the both support portions are formed by the plurality of inner sleeves and the plurality of outer sleeves.