JP2003165198A - Bearing attaching and detaching apparatus and system thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simultaneously and stably attach and detach two bearings of a double-side printing unit with respect to a blanket cylinder in a bearing attaching and detaching apparatus and a bearing attaching and detaching system. <P>SOLUTION: The bearing attaching and detaching apparatus 10 for attaching and detaching two bearings 53 on the side of two blanket cylinders 4 of the double-side printing unit 2 is constituted of a bearing support member 11 for together supporting the bearings 53 of both blanket cylinders 4; a fluid pressure cylinder 12 for allowing the bearing support member 11 to advance and retreat along the axes of the blanket cylinders 4, between a mounting position where the bearings 53 are respectively mounted on the blanket cylinders 4 and a separation position where the bearings 53 are respectively separated from the blanket cylinder 4; and two guide shafts 14 arranged so as to hold the drive shaft 12b of the fluid pressure cylinder 12, and guiding the advance and retreat movement of the bearing support member 11 due to the fluid pressure cylinder 12. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing attaching / detaching device and a bearing attaching / detaching system for simultaneously attaching and detaching bearings on the operating sides of two blanket cylinders of a double-sided printing unit.

[0002]

2. Description of the Related Art In an offset rotary press (printing machine), ink filled in an ink reservoir is sequentially transferred by a group of ink rollers arranged side by side, while appropriately kneading in the process to form a thin ink film. ing. Then, the formed ink film is transferred to the printing plate wound around the plate cylinder, further transferred to the outer peripheral surface of the blanket cylinder, and then printed on the traveling web by rolling contact with the blanket cylinder. ing.

By the way, since the outer peripheral surface of the blanket cylinder is made of an elastic member mainly made of rubber or the like, it is liable to be worn out or damaged and needs to be replaced. For this reason,
The outer peripheral surface of the blanket cylinder is conventionally configured to be removable. The attachment and detachment of the elastic member with respect to such a blanket cylinder will be described with reference to FIG. FIG. 8 shows a blanket cylinder of a type in which a cylindrical (sleeve) -shaped blanket 4B is fitted on the base shaft roller 4A. The cylindrical blanket 4B is constructed by integrally winding a skin layer formed of an elastic material such as rubber around the metal sleeve 4A. Also, a cylindrical blanket 4B
8 is rotatably supported by inner bearings 51 and 52 between the frames 50A and 50B, as shown in FIG. The inner bearing 51 on the operating side is fitted to an outer bearing (bush) 53 which is detachable from the frame 50A. Therefore, the cylindrical blanket 4B with respect to the base roller 4A
The outer bearing 53 is once pulled out from the frame 50A to form a predetermined space, and the cylindrical blanket 4B used until then is pulled out from the base shaft roller 4A and the inner bearing 51. After that, the new cylindrical blanket 4B is inserted and the cylindrical blanket 4B is replaced.

A device for attaching and detaching the bearing as described above has been developed in the past, and is disclosed in, for example, Japanese Patent Laid-Open No. 6-27.
There is a bearing attaching / detaching device disclosed in Japanese Patent No. 8265. In this device, a bearing extraction member that engages with the bearing of the printing cylinder (blanket cylinder) is attached to the tip of the output shaft of the actuator, and the bearing is removed from the printing device by moving the bearing extraction member horizontally by the actuator. Removed.

[0005]

In the bearing attaching / detaching device, one or two actuators for orienting the bearings of the blanket cylinder are provided for each bearing. Therefore, when this bearing attaching / detaching device is applied to a double-type printing unit that simultaneously prints on both sides of a web, that is, a double-sided printing unit in which blanket cylinders are provided above and below a running web, respectively,
Two or more actuators must be installed.
In a double-sided printing unit, it is common to replace the cylindrical blanket for two blanket cylinders at the same time.
It is preferable to construct the device efficiently by allowing the mounting and dismounting of the bearings with respect to the two blanket cylinders simultaneously by one actuator (that is, by moving the two bearings by one actuator).

However, when one actuator is used to move two bearings, the weight of the bearing causes bending of the drive shaft of the actuator. For this reason,
The bearing may be deviated or tilted from the proper position, and the bush may not be stably attached to or detached from the bearing. The present invention has been devised in view of the above problems, and an object thereof is to provide a bearing attaching / detaching device and a bearing attaching / detaching system that enable two bearings to be attached / detached to / from a blanket cylinder simultaneously and stably. And

[0007]

Therefore, the bearing attaching / detaching device of the present invention (claim 1) is a bearing attaching / detaching device capable of simultaneously attaching / detaching the operating side bearings of two blanket cylinders of a double-sided printing unit. A bearing support member that supports the bearings of the blanket cylinders together, a mounting position where the bearings are mounted on the blanket cylinders, and a separation position where the bearings are separated from the blanket cylinders, respectively. A fluid pressure cylinder that advances and retracts the bearing support member along the axis of the blanket cylinder, and guides forward and backward movements of the bearing support member that are arranged so as to sandwich the drive shaft of the fluid pressure cylinder. It is characterized by being configured with two guide shafts.

In this case, when viewed from the axial direction of the blanket cylinder, the fluid pressure cylinder is arranged so that its drive shaft is located between the two bearings, and the two guide shafts are It is preferable that they are arranged at equal intervals with respect to the middle (claim 2). Further, the two guide shafts are preferably arranged on a straight line connecting the shaft centers of the two bearings to each other when viewed from the axial direction of the blanket cylinder (claim 3). ).

Further, a cylinder support member for supporting the fluid pressure cylinder, and a cylinder support member moving means for moving the cylinder support member forward and backward with respect to the blanket cylinder along a direction intersecting with the axis of the blanket cylinder. Is preferably provided (Claim 4). Further, it is preferable that the cylinder support member moving means includes guide means for guiding the forward and backward movement of the cylinder support member (claim 5).

The bearing attaching / detaching system of the present invention (claim 6)
Is a bearing mounting / demounting system for simultaneously mounting / demounting the bearings on the operating side of the two blanket cylinders of the duplex printing unit,
The bearing attaching / detaching device according to any one of claims 1 to 5 is provided, and in at least one of the two blanket cylinders, the bearing is eccentrically arranged with respect to the blanket cylinder. A bearing rotation driving means for rotating the eccentrically arranged bearing is also provided, and the bearing rotation driving means includes an engagement member protruding in the radial direction of the bearing and the bearing via the engagement member. A drive lever capable of rotating and driving, when the bearing support member is in the mounting position, the engaging member and the drive lever engage each other, while the bearing is in the disengaged position. At times, the engagement is released.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. First, a bearing attaching / detaching device and a bearing attaching / detaching system according to an embodiment of the present invention will be described. 1 to 7 are views showing a bearing attaching / detaching device and a bearing attaching / detaching system according to an embodiment of the present invention, and FIG. 1 is a schematic front view showing a configuration thereof (a diagram viewed from a web running direction, FIG. 2 is a schematic side view showing the structure thereof, and FIG. 3 is a view for explaining the eccentric arrangement of the blanket cylinder, the inner bearing and the outer bearing,
(A) is a schematic front view (partially cut away), (b)
Is a schematic side view, FIG. 4 is a diagram showing a configuration of a rotation mechanism (bearing rotation driving means) of the outer bearing, (a) is a schematic side view thereof, and (b) is a schematic X view thereof. -X sectional view,
(C) is a schematic sectional view from the front, FIG. 5 is a schematic side view showing the configuration of the printing unit, FIG. 6 is a schematic diagram showing the configuration of the plate cylinder, and FIG. 7 is a schematic view of the blanket cylinder. It is a typical sectional view by the front view which shows a structure.

As shown in FIG. 5, the printing unit 1 of the present embodiment is constructed so that both sides of a web 2 can be printed, and a plate cylinder (printing cylinder) 3 and a blanket cylinder (transferring) are provided above and below the web 2, respectively. Body 4 is provided. In the case of a printing machine that performs multicolor printing, such a printing unit 1
Are provided along the traveling path of the web 2.

As shown in FIG. 6, each plate cylinder 3 is provided with a printing plate 3A on which a pattern (line) to be printed is printed, and ink is supplied to the plate cylinder 3 by an ink supply device (not shown). Then, the pattern on the printing plate 3A is once transferred to the blanket cylinder 4, and then the pattern transferred to the blanket cylinder 4 is printed on the running web 2. Printing plate 3
A is a plate-shaped member formed of, for example, aluminum, and is attached to the plate cylinder 3. Here, the mounting work of the printing plate 3A will be briefly described. At the time of mounting the printing plate 3A, one end side (holding side) 3Aa of the printing plate 3A is engaged with one end portion of the gap 3B formed in the plate cylinder 3. Then, the printing plate 3A is wound around the plate cylinder 3. Then, the other end side (edge side) 3Ab of the printing plate 3A is pushed into the gap 3B,
The other end 3Ab is fixed by a clamp device (not shown). As a result, the printing plate 3A is fixed while being wound around the plate cylinder 3.

Now, as shown in FIG. 7, the blanket cylinder 4 is constructed by fitting a cylindrical blanket 4B on a base roller 4A. The cylindrical blanket 4B is configured by adhering a plate-shaped blanket 4Bb formed of an elastic body on the outer circumference of a metal cylindrical sleeve 4Ba, and can be inserted into and removed from the base roller 4A along the axial direction of the blanket cylinder 4. It is like this.

The base shaft roller 4A comprises a shaft portion 4Aa and a body portion 4Ab which is inserted into the shaft portion 4Aa. The body portion 4Ab is provided on the operating side frame 50A and the driving side frame 50B, respectively. Inner bearing 5 installed
It is rotatably supported by 1,52. On the other hand, the shaft portion 4Aa has an operation-side end portion fixed and supported by the housing of the inner bearing 51, and is configured such that only the body portion 4Ab can rotate.

Since the inner diameter of the hollow portion of the body portion 4Ab into which the shaft portion 4Aa is inserted is set to be slightly larger than the outer diameter of the shaft portion 4Aa, there is a gap between the shaft portion 4Aa and the body portion 4Ab. 5A will be formed. Cylindrical blanket 4
Compressed air is supplied from an external device (not shown) through the gap 5A to a plurality of air injection holes 5 provided along the peripheral surface on the operation side of the base shaft roller 4A when B is fitted and removed. As a result, the compressed air injected from the air injection hole 5 expands the diameter of the cylindrical blanket 4B, so that the cylindrical blanket 4B can be easily fitted and removed.

Here, the bearing attaching / detaching device and the bearing attaching / detaching system of this embodiment will be described. As described above in the description of the related art, when replacing the cylindrical blanket 4B, it is necessary to attach / detach the outer bearing 53 to / from the operation side frame 50. The bearing attaching / detaching device 10 is for attaching / detaching the outer bearing 53 when the cylindrical blanket 4B is exchanged in this way, and includes two outer bearings 53 arranged facing the upper and lower surfaces of the running web. It is attached and detached at the same time.

As shown in FIGS. 1 and 2, the present bearing attaching / detaching device 10 includes a bracket (bearing support member) 11 to which two outer bearings 53, 53 are attached, and this bracket 11.
And a fluid pressure cylinder (here, an air cylinder) 12 for moving the outer bearings 53, 53 along the axial direction of the base shaft roller 4A via. A main body 12a of the cylinder 12 is fixed to a base member (cylinder support member) 13, and the bracket 11 is connected to a drive shaft 12b of the cylinder 12, which extends the drive shaft 12b as shown by a solid line in FIG. And the outer bearing 5 mounted on the bracket 11
When the driving shaft 12b is retracted, the outer bearings 53, 53 are separated from the blanket cylinder 4 by the mounting positions of the blanket cylinder 4 (operation frame 50A). The detached position is the detached position.

Further, the present bearing attaching / detaching device 10 is further provided with two guide shafts 14 and 14 which are parallel to the cylinder drive shaft 12b and sandwich the cylinder drive shaft 12b. One end of each of the guide shafts 14 and 14 is connected to the bracket 11, and the other end of the guide shaft 14 is movably inserted into the base member 13.
It is designed to guide the movement of 3,53.

Further, as shown in FIGS. 1 and 2, the present bearing attaching / detaching device 10 has a base member (cylinder support member).
Base member moving means (cylinder support member moving means) 15 for moving 13 in a direction intersecting with the axis of the blanket cylinder 4 is provided. The base member moving means 15 includes a pair of upper and lower rails (guide means) 15a, 15a in which the base member 13 is slidably fitted in a direction intersecting with the axis of the blanket cylinder 4, and one rail. The cylinder 15b is provided with a fluid pressure cylinder (cylinder support member driving means) 15b attached to the side of 15a, and the drive shaft of the cylinder 15b has a connecting member 13a protruding from the side surface of the base member 13. Through the base member 13
It is connected to the. Each rail 15a is installed on a columnar member 50a that is erected on the frame 50A.

As a result, the base member moving means 15
Then, by retracting the drive shaft of the fluid pressure cylinder 15b, the base member 13 is brought to the operating position shown by the solid line in FIG. 2, and by extending the drive shaft of the fluid pressure cylinder 15b, the base member 13 is moved to the operating position shown in FIG. The exchange position is indicated by a two-dot chain line. The operating position is a position where the base member 13 faces the blanket cylinder 4,
When printing (operating) with the printing unit,
At this operating position, the cylinder 12 on the base member 13 is extended to bring the outer bearing 53 to the mounting position, whereby the outer bearing 53 is mounted on the blanket cylinder 4. On the other hand, when the cylindrical blanket 4B of the blanket cylinder 4 is replaced, the cylinder 12 is retracted at the above operating position to separate the outer bearing 53 from the blanket cylinder 4, and then the base member 13 that supports the outer bearing 53. Is moved to the exchange position, and a space for pulling out the cylindrical blanket 4B from the blanket cylinder 4 is secured to the side of the blanket cylinder 4.

Here, the drive shaft 12 of the cylinder 12 described above.
The setting of the position of b and the positions of the guide shafts 14, 14 will be described with reference to FIG. Here, the position of the drive shaft 12b is the position of the shaft center C0 of the drive shaft 12b, and the position of the guide shaft 14 is the position of the shaft center C1 of the guide shaft 14. In a side view as shown in FIG. 2, that is, when viewed from the axial center direction of the blanket cylinder 4, the drive shaft 12b has its axial center C
Here, 0 is arranged so as to be located at the center Cm (position equidistant from the shaft centers Cb, Cb) Cm of the shaft centers Cb, Cb of the both outer bearings 53 (that is, the drive shaft 12b has the both outer bearings 53).
Is located in the middle of). Similarly, in a side view as shown in FIG. 2, both guide shafts 14 and 14 have their center axes C1 and C1, here, the center axes Cb and Cb of the outer bearings 53, respectively.
A straight line S is formed so as to be respectively aligned with Cb, the axis centers C1 and C1 thereof are arranged to be equidistant from the intermediate Cm, and the axis centers Cb and Cb of the outer bearing 53 are connected to each other. It is arranged so that it is located above.

In this way, the drive shaft 12b and the guide shaft 1
By disposing 4, 14, two outer bearings 53, 53
Are supported in good balance (the drive shaft 12b and the guide shaft 1
Load distribution applied to the outer bearing 5 and the guide shafts 14 and 14 can be made appropriate.
The weight of 3,53 is prevented from bending.

The printing unit 1 (see FIG. 5) is provided with a mechanism for adjusting the nip pressure between the blanket cylinders 4 and 4 and exchanging the cylindrical blanket 4b of each blanket cylinder 4. The mechanism will be described below with a focus on the operating side. In FIGS. 1 and 2, the blanket cylinder 4, the inner bearing 51, and the outer bearing 53 are all shown coaxially. ) And (b), the inner bearing 51 and the outer bearing 53 are eccentrically arranged with respect to each blanket cylinder 4.

Specifically, in the upper blanket cylinder 4, the inner bearing 51 and the outer bearing 53 are arranged with a straight line different from the axis Cr of the blanket cylinder 4 as the axis Cb. On the other hand, in the lower blanket cylinder 4, the inner bearing 51 is arranged with a straight line Cb ′ different from the axis Cr of the blanket cylinder 4 as the axis center, and the outer bearing 53 has the above-mentioned axis centers Cr and Cb ′. A straight line different from any of the above is arranged as the axis Cb. In the upper blanket cylinder 4, the inner bearing 51 and the outer bearing 53 are configured so as to integrally rotate about the axis Cb, and in the lower blanket cylinder 4, the inner bearing 51 centers the axis Cb '. To
The outer and inner bearings 51 are configured so as to be able to rotate independently of each other about a shaft center Cb.

The inner bearing 51 of each blanket cylinder 4
By rotating (that is, each blanket cylinder 4 has its axis Cb, C
The cylindrical blanket 4B can be attached and detached by rotating the blanket cylinders 4 away from each other (by rotating them around b '). Also, the outer bearing 53 of the lower blanket cylinder 4
By rotating (ie, the lower blanket cylinder 4 with the axis Cb
The nip pressure can be adjusted by adjusting the distance between the centers of the blanket cylinder (reference cylinder) 4 and the upper blanket cylinder 4 (rotating and moving around the center).

The rotation mechanism (bearing rotation driving means) 54 of the outer bearing 53 of the lower blanket cylinder 4 will be described below with reference to FIGS. 4 (a), 4 (b) and 4 (c). The rotation mechanism 54 has an engaging member 53a provided on the outer bearing 53 so as to project in the radial direction, and the outer bearing 53 centered on the axis Cb of the outer bearing 53 via the engaging member 53a as described above. And a drive lever 55 for rotationally driving the drive lever 55, and the drive lever 55 is attached to the operation side frame.

The engaging member 53a has an axial center Cb of the outer bearing 53.
A cam follower 53b is attached along the above, and a recess 55a is provided at one end (swing end) of the drive lever 55 on the side facing the cam follower 53b. While the outer bearing 53 is mounted on the blanket cylinder 4, the cam follower 53b is inserted / engaged in the recess 55a, while the bearing attaching / detaching device 10 moves the outer bearing 53 along the axis of the blanket cylinder 4. When pulling out from the body 4 (operation side frame 50A), the cam follower 53b is inserted from the recess 55a.
Is withdrawn, the engagement is released.

A shaft member 55b is projectingly provided on the other end (base end) of the drive lever 55, and the drive lever 55 has a main body attached to the operation side frame 50A via the shaft member 55b and the linkage 56. Connected to a fluid pressure cylinder 57. One end of the linkage 56 is the shaft member 5
5b is fixed, and the other end is rotatably connected to the drive shaft of the fluid pressure cylinder 57. By advancing and retracting this drive shaft, the drive lever 55 can be tilted about the shaft member 55b. It is like this. Then, by tilting the drive lever 55, the recess 55a
The inner cam follower 53b is driven according to the shape of the recess 55a, whereby the outer bearing 53 rotates by a predetermined amount and the nip pressure is adjusted.

A taper surface 55c is provided at the opening of the recess 55a so as to expand outward, and when the outer bearing 53 is mounted on the frame 50A, the outer bearing 53 and the drive lever 55 are mounted. It is designed to be able to be stably assembled with. That is, the outer bearing 53 is connected to the frame 50A.
The cam follower 53b of the outer bearing 53 when mounted on the
However, since it is guided to the recess 55a by the tapered surface 55c, the cam follower 53b and the drive lever 55 can be engaged with each other, that is, the outer bearing 53 and the drive lever 55 can be stably assembled. That is, in addition to the bearing attaching / detaching device 10 described above, a bearing attaching / detaching system capable of stably attaching / detaching the outer bearing 53 to / from the blanket cylinder 4 and the operation side frame 50A by such a rotating mechanism 54 is constructed.

As shown in FIGS. 1 and 2, a flange 53d is provided on the mounting side of the outer bearing 53 to the bracket 11, and the flange 53d is formed on the bracket 11 along its peripheral surface. It is loosely inserted in the claw portion 11a. As a result, the drive lever 55 causes the outer bearing 5 to move.
3 can be rotated on the bracket 11.

Since the bearing attaching / detaching device and the bearing attaching / detaching system according to the embodiment of the present invention are configured as described above, the following actions and effects can be obtained. That is, when replacing the outer bearing 53, first, referring to FIGS.
As shown by the solid line in FIG.
Is expanded and the cylinder 15 is contracted (that is, the outer bearing 53 is attached to the blanket cylinder 4), first, the cylinder 12 is contracted as shown by a two-dot chain line in FIG. The outer bearing 53 is pulled out from the case body 4 at the same time in the axial direction. Next, as indicated by a two-dot chain line in FIG. 2, the cylinder 15 is extended to retract the outer bearing 53 together with the cylinder 12 from the front side of the blanket cylinder 4. As a result, a working space necessary for inserting and removing the cylindrical blanket 4B is secured on the side of the blanket cylinder 4. And for the blanket cylinder 4,
After the cylindrical blanket 4B is detached, a new cylindrical blanket 4B is attached to the cylindrical blanket 4B.
Is completed.

After that, the cylinder 15 is retracted as shown by the solid line in FIG. 2 and then the cylinder 12 is extended as shown by the solid line in FIG. Is attached to both blanket cylinders 4, and the replacement work of the cylindrical blanket 4B is completed. When the outer bearing 53 is inserted into and removed from the blanket cylinder 4 by the cylinder 12 during such replacement work of the cylindrical blanket 4B, both outer bearings 53 are connected to the cylinder drive shaft 1
Since the cylinder drive shaft 12b is guided and supported by the guide shafts 14 and 14 provided on both sides of 2b, the cylinder drive shaft 12b is prevented from being bent by the weight of the both outer bearings 53, and the bending causes the both outer bearings 53 to function properly. It is possible to prevent the sheet from being slightly deviated from the conveying path.

Therefore, according to the present bearing attaching / detaching device and the bearing attaching / detaching system, there is an advantage that the two outer bearings 53, 53 can be simultaneously and stably assembled to the blanket cylinder 4. Particularly, in a side view, the cylinder drive shaft 12b is arranged in the middle of the outer bearings 53, 53, the guide shafts 14, 14 are provided at substantially equal distances from the middle, and the guide shafts 14, 14 are Outer bearing 53,5
The cylinder drive shaft 12b and the guide shafts 14 and 1 are arranged on the straight line S formed by connecting the three axial centers Cb.
4, the load of both outer bearings 53 is applied in a well-balanced manner, and there is an advantage that both outer bearings 53 can be assembled to the blanket cylinder 4 more stably.

Further, in the rotating mechanism (bearing rotation driving means) 54 of the outer bearing 53 used for adjusting the nip pressure, the cam follower 53b of the outer bearing 53 is driven while the outer bearing 53 is mounted on the blanket cylinder 4. The lever 55 is positioned so as to be inserted / engaged in the recess 55a of the lever 55, and when the outer bearing 53 is pulled out from the blanket cylinder 4, the cam follower 53b is pulled out from the recess 55a and the engagement is released. Becomes That is, when replacing the cylindrical blanket 4B, when the outer bearing 53 is inserted into and removed from the operation side frame 50A, the cam follower 53b of the outer bearing 53 and the drive lever 55 attached to the operation side frame 50A are connected and disconnected. Therefore, there is an advantage that no special work is required and the replacement work of the cylindrical blanket 4B can be simplified.

The bearing attaching / detaching device and the bearing attaching / detaching system of the present invention are not limited to the above-mentioned configurations, and various modifications can be made. For example, in the above-described embodiment, the cylinder drive shaft 12b is provided with the outer bearings 53, 53 in a side view.
Although the guide shafts 14 and 14 are arranged at an equal distance from the middle, the guide shafts 14 and 14 are provided so as to sandwich the cylinder drive shaft 12b, and the cylinder drive shaft 12b is provided on both sides. The outer bearings 53, 53 may be arranged outside the middle, or the guide shafts 14, 14 may be arranged at different distances from the middle.

Similarly, in the above-described embodiment, the guide shafts 14, 14 are arranged on a straight line S formed by connecting the axial centers Cb of the outer bearings 53, 53 in a side view. It is also possible to dispose one or both of the guide shafts 14 and 14 from the straight line S and arrange them.
Although not included in the present invention, the blanket cylinder 4 of a single-sided printing machine
As a bearing attaching / detaching device for inserting / removing the outer bearing, a bracket (bearing supporting member) for supporting the outer bearing and the fluid pressure cylinder 1 for driving the bracket, as in the above-described embodiment.
It is also possible to configure the device by including 2 and two guide shafts 14 and 14 provided so as to sandwich the drive shaft 12b of the fluid pressure cylinder 12. In this case, it is preferable that the drive shaft 12b is arranged so that its axis coincides with the axis of the outer bearing when viewed from the side, and the guide shafts 14 and 14 have their axes centered on the axis of the outer bearing. It is preferable to place them equidistant from the heart.

[0038]

As described in detail above, according to the bearing attaching / detaching device of the present invention (claim 1), when the two bearings are moved back and forth by the fluid pressure cylinder through the bearing support member, the forward and backward movement is performed. Is performed while being guided by the two guide shafts, the bending of the drive shaft of the fluid pressure cylinder due to the weight of the two bearings is prevented, and the two bearings are simultaneously and stably supported with respect to the blanket cylinder. It has the advantage of being removable.

In this case, when viewed from the axial direction of the blanket cylinder, the fluid pressure cylinder is arranged so that its drive shaft is located in the middle of the two blanket cylinders, and both guide shafts are equally spaced from the middle. With this arrangement, the load of the bearing is applied to the drive shaft of the fluid pressure cylinder and the two guide shafts in a well-balanced manner, so that the bearing can be attached to and detached from the blanket cylinder more stably. ).

Similarly, when the two guide shafts are arranged on a straight line connecting the shaft centers of the two bearings when viewed from the axial direction of the blanket cylinder, the drive shaft of the fluid pressure cylinder and the two guide shafts are arranged. Since the load of the bearing is applied in a well-balanced manner, the bearing can be attached to and detached from the blanket cylinder more stably (claim 3). Further, when the cylindrical blanket of the blanket cylinder is replaced, by separating the bearing from the blanket cylinder by the cylinder supporting member moving means, a working space for replacing the cylindrical blanket of the blanket cylinder can be secured. The replacement work can be performed stably (claim 4).

In this case, the cylinder support member moving means is
If the guide means for guiding the forward / backward movement of the cylinder support member is provided, the forward / backward movement of the cylinder support member can be stably performed (claim 5). According to the bearing attaching / detaching system of the present invention (claim 6), in the bearing rotation driving means for rotating the bearing eccentrically arranged with respect to the blanket cylinder, when the bearing is mounted on the blanket cylinder, the engaging member of the bearing is attached. The drive lever engages with the drive lever, and when the bearing is removed from the blanket cylinder, the engagement between the engaging member and the drive lever is released. In doing so, there is an advantage that the work of separating the engagement member and the drive lever can be made unnecessary.

[Brief description of drawings]

FIG. 1 is a schematic front view showing a configuration of a bearing attaching / detaching device and a bearing attaching / detaching system according to an embodiment of the present invention (a view seen from a web traveling direction) (partially broken and shown).

FIG. 2 is a schematic side view showing a configuration of a bearing attaching / detaching device and a bearing attaching / detaching system as one embodiment of the present invention (a view seen from the axial center direction of the blanket cylinder).

FIG. 3 is a blanket cylinder according to an embodiment of the present invention,
It is a figure for demonstrating the eccentric arrangement of an inner bearing and an outer bearing, (a) is a typical front view and (b) is a typical side view.

4A and 4B are diagrams showing a configuration of a rotation mechanism (bearing rotation driving means) for an outer bearing according to an embodiment of the present invention, in which (a) is a schematic side view thereof and (b) is a schematic side view thereof. XX sectional drawing, (c) is the typical sectional view by the front view.

FIG. 5 is a schematic side view showing a configuration of a printing unit according to an embodiment of the present invention.

FIG. 6 is a schematic diagram showing a configuration of a plate cylinder according to an embodiment of the present invention.

FIG. 7 is a schematic cross-sectional view from the front showing the configuration of the blanket cylinder according to the embodiment of the present invention.

FIG. 8 is an explanatory diagram for explaining a method of exchanging a cylindrical blanket in a general blanket cylinder.

[Explanation of reference numerals] 1 printing unit 2 web 3 plate cylinder 3A printing plate 3Aa gripping side 3Ab tail edge 3B gap 4 blanket cylinder 4A base roller 4Aa shaft 4Ab body 4Ac flange 4Ad taper surface 4B cylindrical blanket 4Ba sleeve 4Bb Plate-shaped elastic body 5 Air injection hole 5A Gap (air supply passage) 10 Bearing attaching / detaching device 11 Bracket (bearing support member) 11a Claw 12 Fluid pressure cylinder (air cylinder) 12a Main body 12b of fluid pressure cylinder 12 Drive shaft 13 Base member (cylinder support member) 13a Connection member 14 Guide shaft 15 Base member moving means (cylinder support member moving means) 15a Rail (guide means) 15b Fluid pressure cylinder (cylinder support member driving means) 50A, 50B Frame 50a Columnar members 51, 52 Axis 51A housing 53 outer bearing 53a engagement member 53b cam follower 53d flange 54 rotation mechanism (bearing rotation drive means) 55 drive lever 55a recess 55b shaft member 55c taper surface 56 linkage 57 fluid pressure cylinder 57a drive shaft C0 of fluid pressure cylinder 57 drive Shaft center of shaft 12b C1 Shaft center of guide shaft 14 Cb Shaft center of outer bearing 53 Cb 'Shaft center of inner bearing 52 Shaft center of blanket cylinder 4 Cm Shaft center of Cb, Cb Shaft of both outer bearings 53 A straight line obtained by connecting the hearts Cb and Cb

Claims (6)

[Claims] 1. A bearing attaching / detaching device capable of simultaneously attaching / detaching bearings on the operating sides of two blanket cylinders of a double-sided printing unit, the bearing supporting member supporting both the bearings of the blanket cylinders, and the bearings. A fluid pressure cylinder for advancing and retracting the bearing support member along the axis of the blanket cylinder between a mounting position at which the blanket cylinder is mounted and a disengagement position at which the bearings are respectively separated from the blanket cylinder; A bearing attaching / detaching device, comprising two guide shafts arranged so as to sandwich the drive shaft of the fluid pressure cylinder and respectively guiding forward and backward movements of the bearing support member by the fluid pressure cylinder. . 2. The fluid pressure cylinder is arranged such that its drive shaft is located in the middle of the both bearings when viewed from the axial direction of the blanket cylinder, and the two guide shafts are The bearing attaching / detaching device according to claim 1, wherein the bearing attaching / detaching device is arranged at equal intervals with respect to the middle. 3. When viewed from the axial direction of the blanket cylinder,
On the straight line connecting the shaft centers of the above two bearings to each other,
3. The bearing attaching / detaching device according to claim 1, wherein the two guide shafts are respectively arranged. 4. A cylinder support member for supporting the fluid pressure cylinder, and a cylinder support member moving means for moving the cylinder support member forward and backward with respect to the blanket cylinder along a direction intersecting with the axis of the blanket cylinder. The bearing attachment / detachment device according to claim 1, wherein the bearing attachment / detachment device is provided. 5. The bearing according to claim 1, wherein the cylinder support member moving means includes guide means for guiding the forward / backward movement of the cylinder support member. Detachable device. 6. A bearing attaching / detaching system for simultaneously attaching / detaching bearings on the operating side of two blanket cylinders of a double-sided printing unit, wherein the bearing attaching / detaching device according to claim 1 is provided. In at least one of the above two blanket cylinders, the bearing is eccentrically arranged with respect to the blanket cylinder, and bearing rotation drive means for rotating the eccentrically arranged bearing is provided. The rotary drive means includes an engaging member protruding in the radial direction of the bearing, and a drive lever capable of rotationally driving the bearing via the engaging member, and the bearing support member is mounted on the mounting member. The bearing attachment / detachment system is characterized in that the engagement member and the drive lever engage with each other when in the position, while the engagement is released when the bearing is in the disengaged position. Tem.