JPH01245875A - Support structure of rubber roll - Google Patents

Abstract

PURPOSE:To simply and rapidly replace the metal sleeve of a cylinder by supporting one of the journal parts of the cylinder capable of permitting a metal sleeve to fit and detach by a bearing bracket in a cantilevered fashion and supporting the other journal part by an openable movable bearing bracket. CONSTITUTION:In altering the effective width of a rubber roll, the lock mechanism of a movable bearing bracket 12 is released at first and a bracket main body 12a whose cover bracket 12b is opened is revolved and shaken around a vertical axis P. Hereupon, the circumference of a journal part 23a is largely opened and a space for fitting and pulling a metal sleeve 26 is formed. By this mechanism, a cylinder 24 comes supported in a cantilevered fashion by one frame through one journal part 23b and, in this state, the metal sleeve 26 is exchanged from the free end of the cylinder 24. After the finish of this exchange, by returning the bearing bracket 12 to a predetermined pivotal support position, one journal part 23a is supported by the bracket 12 and the cylinder 24 is supported on both sides thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a support structure for a rubber roll (impression roll) in a coating machine (roll coater) or a printing machine. More specifically, the target is a gol 110 in which a metal sleeve provided with a rubber layer on the outer periphery is removably fitted from one end side of a cylinder supported on the machine body side, and the rubber roll is inserted through the left and right journal parts. It is characterized by a structure in which it is supported between the frames on the fuselage side.

[Conventional technology]

The rubber roll having the above configuration has the advantage that a rubber roll can be configured according to the web width by replacing and attaching various types of metal sleeves having different effective widths of the rubber layer to the cylinder. It takes a rubber roll itself.

For example, it is known from Japanese Patent Application Laid-Open No. 62-216668.

[Problem to be solved by the invention]

By using the above rubber roll, it is easier to change the specifications of the rubber roll compared to the conventional method in which many types of rubber rolls with different effective widths of the rubber layer are prepared and the entire roll is replaced and installed depending on the web width. Become. However, the above-mentioned conventional example has not yet gone beyond a proposal, and a concrete structure for mounting such a rubber roll on a machine has not been studied.

For example, as for the support structure, the entire rubber roll is configured to be detachable from the fuselage as in the past, and the rubber roll is once removed from the fuselage and the metal sleeve is replaced.
It is conceivable to attach it to the fuselage again after that. However, this does not effectively take advantage of the convenience of rubber rolls using replaceable metal sleeves.

The present invention has been made with attention to these points, and its purpose is to make it possible to replace only the metal sleeve extremely easily and quickly while supporting the cylinder on the body side, and to fully enjoy the convenience of replaceable rubber rolls. The aim is to obtain a support structure for rubber rolls that can be utilized effectively.

(Means for Solving the Problems) In the present invention, as shown in FIG. 1, a rubber roll 1, which is formed by fitting a metal sleeve 26 provided with a rubber layer 25 on the outer periphery so that it can be inserted and removed from one end of a cylinder 24, is attached to a machine. The metal sleeve 2 is supported on the left and right frames 4a and 4b.
The journal part 23b of the cylinder 24 on the side opposite to the insertion/extraction end of the metal sleeve 6 is supported in a cantilevered manner via a bearing 32 on a fixed bearing bracket 13 provided on one frame 4b, and the other side on the metal sleeve insertion/extraction end side journal part 2
3a is supported via a bearing 33 on a movable bearing bracket 12 provided on the other frame 4a.

However, the movable bearing bracket 12 is
As shown in the figure, the journal portion 23a has a two-split structure that can be engaged and detached.

As shown in FIG. 4, the movable bearing bracket 12 is attached to the frame 4a so that its posture can be changed between the cylinder shaft support position and a position radially outward from the cylinder shaft support position.
A locking mechanism 38 is provided for fixing the cylinder to the cylinder shaft support position.

[Effect]

When changing the effective width of the rubber roll 1, first, the locking mechanism 38 of the movable bearing bracket 12 is released, and the bracket 12 is moved radially outward.

The metal sleeve insertion/extraction end side of the cylinder 24 is largely opened. As a result, the cylinder 24 is connected to one journal portion 2.
The metal sleeve 26 is supported in a cantilevered manner by one frame 4b via the cylinder 3b, and in this state, the metal sleeve 26 is replaced from the free end side of the cylinder 24. After replacing the metal sleeve 26.

By returning the bearing bracket 12 to the predetermined shaft support position, one journal portion 23a is attached to the bracket 12.
This supports the cylinder 24 in a state where it is supported on both sides.

[First Embodiment] FIGS. 1 to 7 show a first embodiment in which the present invention is applied to a gravure printing machine.

Figure 1 is an exploded front view of the coater head, and Figure 2 is a side view of the coater head.
and gravure roll 3 are each supported horizontally between left and right frames 4a and 4b, presser roll 2 and rubber roll 1 are movable up and down, and gravure roll 3 is supported in a fixed position. The web not shown is rubber roll 1.
and gravure roll 3. Alternatively, the web may be passed between the rubber roll 1 and the presser roll 2.

The base end of the presser roll 2 is freely rotatably supported by the ends of a pair of left and right support arms 6 which are attached to the left and right frames 4a and 4b via support shafts 5 so as to be able to swing up and down. By swinging the presser rolls 6 and 6 using air cylinders 7 (only the left side is shown), the presser rolls 2
can be adjusted by moving it up and down. This presser roll 2 can be detached from the support arm 6 by swinging open a cover bracket 6a pivotally attached to the ends of both support arms 6.

The rubber roll 1 is rotatably supported via bearing brackets 12 and 13 at the tips of a pair of left and right support arms 11 whose base ends are attached to left and right frames 4a and 4b via fulcrums 10 so as to be vertically swingable. And presser roll 2
A hanging rod 14 pivotally connected to the support arm 6 of
is penetrated by a rotary fitting 15 pivotally connected to the support arm 11 of the rubber roll L, and when the support arm 6 is swung upward by a predetermined amount or more, as shown in FIG. The support arm 11 also rises accordingly, and the rolls 2 and 3 are separated from each other.

The gravure roll 3 is supported by bearing brackets 16 fixed to the left and right frames 4a and 4b, and receives rotational drive.

When the support arm 6 of the presser roll 2 descends.

Following this, the support arm 11 of the rubber roll 1 also descends, and the tapered contact fitting 17 provided on the support arm 11 comes into contact with the stopper 18 provided on the bearing bracket 16 of the gravure roll 3.

In this way, the estimated distance between the rubber roll 1 and the gravure roll 3 is regulated. Furthermore, the support arm 6 descends, and the stopper 20 provided on the support arm 6 of the presser roll 2 comes into contact with the tapered abutment fitting 19 fixed to the support arm 11 of the rubber roll 1, so that the presser roll 2 and the rubber roll are separated. The thought distance with 1 is regulated. What is the distance between each role?

It is adjusted by adjusting the stoppers 18 and 20 with adjustment screws 21 and 22.

4 to 7 show the detailed structure of the rubber roll 1, and the rubber roll 1 has journal parts 23a and 23 at both ends.
A hollow cylinder 24 into which b is screwed and fixed by welding,
It consists of a metal sleeve 26 with a rubber layer 25 integrated on its outer periphery. This metal sleeve 26 is formed extremely thin by nickel plating or the like, and can be expanded and contracted in the radial direction, and can be inserted into and removed from the outer periphery of the cylinder 24 from one end (the left end in the figure). By preparing various types of metal sleeves 26 with different effective working widths W formed with a step in the center of the rubber layer 25 and replacing them with the cylinder 24 in the state shown in FIG. 3, a rubber roll l corresponding to the width of the web can be created. can get.

A plurality of (eight in the embodiment) small holes 27 are bored at the sleeve insertion/removal end side of the cylinder 24 and communicate with the inside of the cylinder, and a plurality (four in the embodiment) are formed in the left and right center portions of the cylinder 24. ) are similarly drilled. Pressurized air (approximately 10 to 1
5 kg/cm'') is supplied, and this pressurized air is blown out from each of the small holes 27 and 28 mentioned above.

In this way, by blowing out pressurized air from each of the small holes 27 and 28 of the cylinder 24, the diameter of the metal sleeve 26 is slightly expanded, thereby allowing the metal sleeve 26 to be easily inserted and removed from the outer periphery of the cylinder 24. Then, by cutting off the supply of pressurized air after fitting, the metal sleeve 26 is elastically reduced in diameter, and is closely fitted and integrated with the cylinder 24. Note that one end of the cylinder 24 (
As shown in FIG. 5, a tapered surface 31 is formed on the right end to facilitate fitting of the metal sleeve 26.

In order to insert and remove the metal sleeve 26 as described above, it is necessary to open one end (left end) of the cylinder 24. Therefore, in the present invention, the left journal portion 23 of the cylinder 24
The feature is that a is supported as follows.

First, the side opposite to the insertion/extraction end side of the metal sleeve 26.

In other words, in the right journal portion 23b, a long cylindrical bearing fixed to the right support arm 11 is supported by the bracket 13 via a pair of left and right bearings 32 arranged with a large span. In other words, the cylinder 1 is supported in a cantilevered manner only by the journal portion 23b.

Furthermore, the journal portion 23a on the sleeve insertion/extraction end side, that is, the left side, is supported via one bearing 33 on the bearing bracket 12 attached to the left support arm 11. In the figure, a bearing 33 is integrally provided on the journal portion 23a side.

In FIGS. 1 to 3, this bearing bracket 12
is a recess 34 for bearing engagement that opens toward the front.
A bracket main body 12a having.

It consists of a cover bracket 12b that closes the front surface of the opening of the recess 34 and abuts and supports the bearing 33 in the four parts 34. The bracket body 12a is attached to the support arm 11 via a support shaft 35 so as to be swingable around the vertical axis P. The base end of the cover bracket 12b is pivotally connected to the lower front end of the bracket main body 12a via a fulcrum 36 so as to be able to swing back and forth, and can be fixed in a closed state with a bolt with a knob 37.

By constructing the bearing bracket 12 in a two-part structure and making it movable so that it can pivot and swing outward in the radial direction of the cylinder 24, the cover bracket 12b is constructed as shown by the imaginary line in FIG. By swinging the bracket main body 12a, which has been opened, around the vertical axis P, the area around the journal portion 23a can be largely opened, and a space for inserting and removing the metal sleeve 26 can be formed.

The movable bearing bracket 12 is provided with a locking mechanism 38 for fixing the journal portion 23a in a position where it is pivotally supported at a normal position. That is, in the lower part of the bracket main body 12a in FIG.

A lock pin 40 is supported which is slidable in the front and back direction and is biased toward the fulcrum 36 of the cover bracket 12b by a spring 39, and is locked when the bracket main body 12a is in the normal cylinder axis support position. A lock hole 41 into which the tip of the pin 40 can fit is formed in the pivot portion of the support arm 11, and a lock hole 41 is formed at the base of the cover bracket 12b so that the end of the lock pin 40 can be inserted into the base of the cover bracket 12b as the bracket 12b swings open and close. An abutting cam 42 is provided.

When the cover bracket 12b is swung to the closed position with the bracket main body 12a in the normal pivot position, the lock pin 40 is projected against the spring 39, and the tip of the pin 40 engages with the lock hole 41. This prevents the movable bearing bracket 12 from swinging around the vertical axis P.

When the cover platen) 12b is swung to the open position,
The lock pin 40 automatically retracts and comes out of the lock hole 41, allowing the bearing platen 12 to swing outward.

When the movable bearing bracket 12 is pivoted outward and the cylinder 24 is supported in a cantilevered manner by only one journal portion 23b, the left journal 23a tends to fall slightly. Therefore, the bearing receiver of the recessed portion 34 of the bracket main body 12a has an opening edge on the insertion side formed into a tapered surface. This ensures that when the bracket main body 12a is pivoted toward the supporting position, the bearing 33 is not automatically positioned but is smoothly guided into the recess 34.

[Second Embodiment] FIGS. 8 to 11 show a second embodiment in which the present invention is applied to a roll coater.

The rubber roll 1 is arranged above the gravure roll 3, and a pickup roll 43 is arranged below the gravure roll 3. The web is rubber roll ■ and gravure roll 3
The coating agent is passed between the pickup roll 4 and
3 It is then applied to the web via a gravure roll 3.

In this case, the rubber roll l has left and right journal parts 23a.
- 23b is fixed to the cylinder 24 by shrink fitting. The support structure for the left and right frames 4a and 4b of the rubber roll 1 is basically the same as that in the first embodiment, and the journal parts 23a and 23b are supported through a movable bearing bracket 12 and a fixed bearing bracket 13, respectively, which are divided into two parts. Supported.

However, the support arm 11 is a dedicated air cylinder 4.
4, the rubber roll 1 approaches and separates from the gravure roll 3 by being directly swung up and down, and the movable bearing bracket 12
This embodiment differs from the first embodiment in that the locking mechanism 38 is configured as follows.

That is, the locking mechanism 38 is composed of a backing plate 45 fixed to the base end of the bracket body 12a of the movable bearing bracket 12, and a bolt with a knob 46 attached to the support arm 11.

As shown in FIG. 9, when the bracket main body 12a is swung and swung to its normal pivoting position, the abutment plate 45 comes into contact with the inner surface of the support arm 11, causing further oscillation (counterclockwise in the figure). ). In this state, the knobbed bolt 46 is operated from the outside of the arm 11, screwed into the backing plate 45, and tightened toward the inner surface of the arm, thereby correctly positioning and fixing the bearing bracket 12 in its normal pivoting posture. be able to.

Further, a stopper 47 is provided on the outer circumferential portion of the right end of the cylinder 24 for positioning the metal sleeve 26 with respect to the cylinder 24 in the axial direction and preventing slip rotation of the metal sleeve 26 with respect to the cylinder 24.

As shown in FIG. 1θ and FIG. 11, this stopper 47 has a stopper piece 48 screwed to the base end of the journal portion 23b, and a part of this stopper piece 48 is provided to protrude slightly from the outer periphery of the cylinder 24. By engaging the protruding portion of the stopper piece 48 with a recess 49 formed at one end of the metal sleeve 26, the metal sleeve 26 is positioned and prevented from rotating.

[Third Embodiment] FIGS. 12 and 13 show a third embodiment of the present invention. In this case, the stopper 47 is a metal bolt attached to the head of a bolt 50 attached to the outer periphery of the end of the cylinder 24. sleeve 2
It has a structure in which a recess 49 formed in 6 is engaged.

[Fourth example] FIG. 14 shows a fourth embodiment of the present invention.

In this case, the stopper 47 serves to fix the metal sleeve 26 to the cylinder 24 with the bolt 51.

[Another embodiment example]

In the embodiment described above, in order to insert and remove the metal sleeve 26 of the rubber roll 1 from one end of the cylinder 24, the bearing bracket 12 having a two-part structure is rotated and swung to connect the journal portion 26 to the journal portion 26.
The bracket 12 is slidable along the support arm 11 so that the bracket 12 can be linearly spaced apart from the support arm 11 in the radial direction. It is also possible to use a suitable locking mechanism 38 such as a set bolt to fix the shaft at the pivot position. In this way, the movable bearing bracket 1
The form of division of the second part and the form of movement outward in the radial direction can be changed arbitrarily.

The rubber layer 25 is coated on the metal sleeve 26.

It is not limited to literal rubber materials, but also includes elastic materials made of resins cured by ultraviolet rays and the like. The metal sleeve 2 itself may be made of a tube material made of, for example, an aluminum alloy, which does not expand or contract, and the means for fixing the sleeve 26 to the cylinder 24 (stopper 47) may also be selected arbitrarily.

The target rubber roll 1 may be read as an impression roll,
Needless to say, it can be applied not only to gravure but also to various roll coaters.

[Effects of the Invention] As described above, in the present invention, one journal part 23b of the cylinder 24 into which the metal sleeve 26 can be inserted and removed is supported in a cantilevered manner on the bearing bracket 13, and the other journal part 23a is divided into two parts. It is supported by a movable bearing bracket 12 that can be opened, and the bracket 12 is configured to be movable radially outward, so that when replacing the metal sleeve 26 according to the web width, the entire cylinder can be replaced. One end (free end) of the cantilevered cylinder 24 can be opened wide by simply moving the bearing bracket 12 on the movable side, without requiring the troublesome work of removing it from the fuselage side, and attaching a metal sleeve to the cylinder 24. 26 can be replaced easily and quickly.

[Brief explanation of the drawing]

1 to 7 show a first embodiment of the present invention. FIG. 1 is a partially unfolded front view. Figure 2 is a side view. FIG. 3 is a side view illustrating the operation of the bearing bracket. FIG. 4 is a cross-sectional plan view showing the rubber roll and its support structure. FIG. 5 is a partially enlarged sectional view of the cylinder. FIG. 6 is a sectional view taken along the line vt-vt in FIG. 4. FIG. 7 is a sectional view taken along the line ■--■ in FIG. 4. 8 to 11 show a second embodiment of the present invention. FIG. 8 is a side view of the coater head. FIG. 9 is a cross-sectional plan view showing the rubber roll and its support structure. FIG. 10 is a partially enlarged sectional view showing a stopper for a metal sleeve. FIG. 11 is a plan view thereof. FIGS. 12 and 13 show a third embodiment of the present invention regarding the stopper. FIG. 12 is a partially enlarged sectional view. FIG. 13 is a plan view thereof. FIG. 14 is a partially enlarged sectional view showing a fourth embodiment of the present invention regarding a precursor stopper. 1...Rubber roll. 4a, 4b...frame. 12...Movable bearing bracket. 12a...Bracket body. 12b...Cover bracket. 13...Fixed bearing brackets 23a, 23b...Journal portion. 24...Cylinder. 25...Rubber layer. 26...Metal sleeve. 32, 33...Bearing. 38...Lock mechanism. 47...stopper.

Claims (1)

[Claims] (1) The rubber roll 1 has left and right journal parts 23a and 2.
3b, and a metal sleeve 26 having a rubber layer 25 on its outer periphery, which is removably fitted into the cylinder 24 from one end side.
In this structure, the journal portion 23b of the cylinder 24 on the side opposite to the insertion/extraction end side of the metal sleeve 26 is connected to the fixed bearing bracket 13 provided on one frame 4b via a bearing 32. The other journal portion 23 on the insertion/extraction end side of the metal sleeve 26 is supported in a cantilevered manner.
a is supported by a movable bearing bracket 12 provided on the other frame 4a via a bearing 33, and the movable bearing bracket 12 is connected to the journal portion 23a.
The bearing bracket 12 is configured in a removable two-split structure, and is attached to the frame 4a so that its posture can be changed between the cylinder shaft support position and a position radially outward from the cylinder shaft support position, and the bearing bracket 12 is attached to the cylinder shaft. A support structure for a rubber roll characterized by comprising a locking mechanism 38 for fixing it at a support position.