JPH0614814Y2 - Shaft supporting hollow rollers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a shaft supporting a roller used in a working machine such as printing or laminating.

[Prior Art] As is well known, work machines for printing, coating, laminating and the like include gravure rollers, offset rollers and coatings for applying ink or adhesive to sheet-like bodies such as resin films, papers and metal thin films. Various rollers are used depending on the application, such as a plate cylinder such as a roller, an impression cylinder for closely adhering the plate cylinder and the sheet-like body, and a laminating roller for press-bonding and laminating a plurality of sheet-like bodies. .

Here, the roller used in the printing machine is taken as an example. In printing, it is necessary to replace the roller for each printing lot according to the width of a sheet-like body such as paper, which is a print target, and the print content and color.

As the printing speed has been improved by the technical improvement of printing machines in recent years, the rollers are frequently replaced as the printing time of the printing lot is shortened.

Here, conventionally, the roller is composed of a base tube which is a hard tube and a rubber tube which covers the outside thereof, and the both are integrated.
The roller is rotatably held by the shaft by penetrating the shaft inside the hollow and inserting a ball bearing between the roller and the shaft. Both ends of the shaft are detachably fixed to the printing machine. Therefore, the shaft is fixed to the printing machine and rotatably holds the roller. Collars are attached to both ends of the rollers to prevent the rollers from coming off. The collars are integrally formed with the ball bearings and can be detachably fixed to the shaft. Therefore, it is possible to remove the roller from the shaft by removing the collar.

Therefore, when replacing the roller, the operator lifts the roller together with the shaft and removes it and puts it on the floor, and then removes the ball bearing together with the collar and removes the roller from the shaft, and then A new roller to be used for printing the above was inserted into the shaft, then the ball bearing and the collar were installed, and the new roller, together with the shaft, was lifted and fixed by the operator on the printing machine.

Therefore, while the shaft uses many types of rollers, it is sufficient to arrange as few as possible to be used in the printing machine.

[Problems to be Solved by the Invention] In the above-mentioned conventional technique, various types of the above-mentioned rollers can be appropriately exchanged, and moreover, the number of the above-mentioned shafts can be as small as possible for the various types of the above-mentioned rollers. It does not have to require a large amount of equipment cost for alignment.

However, since accuracy is required for the roller and the shaft so that the roller does not shake when the roller rotates, a large member having a large thickness is used for the roller and the shaft in order to provide strength. Therefore, both the roller and the shaft are very heavy.

For this reason, when removing the roller and the shaft from the printing machine, the burden on the operator who lifts the roller and the shaft is very heavy and time-consuming.

Also, when removing the roller from the shaft,
To remove the ball bearing and collar,
For the above-mentioned roller placed on the floor etc. and grounded,
It is necessary to support to lift the shaft,
At this time, the burden on the operator who lifts the shaft is heavy, and it takes time.

Therefore, when the rollers are replaced, generally, the two workers perform the replacement of the rollers, and it is not easy to save the labor.

Further, as described above, it is not easy to shorten the time for exchanging the rollers, even though the time for the printing operation by the printing machine is shortened. It was not easy to improve work efficiency.

Here, in order to save labor in the replacement work of the rollers, it is possible to provide a lift device for lifting the rollers and the shaft, but the lift device is required only for the replacement work of the rollers. Therefore, investing a large amount of equipment cost for the lift device is wasteful and not preferable.

Further, it is conceivable to provide the shaft integrally with the roller and omit the work of attaching and detaching the shaft from the roller to shorten the time of the replacement work. Many are required for each. Therefore, a large amount of equipment cost is required to arrange the above-mentioned large number of shafts, and it is not wasteful and appropriate.

[Objective] Therefore, an object of the present invention is to rotate the shaft with respect to the working machine, and further, while holding one end of the shaft on the working machine, the other end of the working machine. The roller supported by the shaft is detachable from the other end of the machine, and the roller is attached to the shaft without detaching the ball bearing and collar from between the shaft and the roller. A shaft supporting a hollow roller that can easily and detachably fix the hollow roller without spending a large amount of equipment and at the same time save labor and reduce the time required for the roller replacement work. To provide.

[Means for Solving the Problems] The present invention has the following technical means for solving the above problems. That is, the description will be made with reference to the reference numerals used in the accompanying drawings corresponding to the embodiments. A sheet-shaped body and other sheets are rotatably supported by the left and right bearings in a working machine such as printing, coating and laminating. A shaft for supporting a hollow roller that contacts an object such as a roller; the shaft 1 includes a lug portion 3 that protrudes and retracts in the radial direction by an external operation, and the lug portion 3 projects in the radial direction. 2 By pressing it against the inner surface, the shaft 1
The roller 2 of the shaft 1 is fixed by fixing the roller 2 to the shaft 1 and retreating the protruding lug portion 3 by aligning the axial centers of the roller 2 and the roller 2.
Is released, and the shaft 1 is removed from the other bearing part 5 while being supported by one of the left and right bearing parts 4 and 5, and the removed one is used to remove the shaft 1 from the shaft 1. It is a shaft that supports a hollow roller that allows the roller 2 to be detached.

Another feature is that one of the left and right bearings 4 and 5 is a universal bearing 4, and the shaft 1 is supported even if the shaft 1 is removed from the other bearing 5, The roller 2 can be detached from the shaft 1.

Further, another feature is that the shaft 1 has a main body shaft 1a, a slide shaft 1b, and a rotation / reciprocation conversion means, and the slide shaft 1b is provided inside the main body shaft 1a and reciprocates with respect to the main body shaft 1a. Only the movement S is possible, and the slide shaft 1b is provided with a plurality of slope core portions 8 at predetermined intervals and reciprocates together, and the main body shaft 1a is located at a portion corresponding to the slope core portion 8. It has a lug portion 3 which is mounted at equal intervals around the periphery and is guided by the slope surface of the slope core portion 8 to radially protrude from the window 11 bored in the main body shaft 1a and holds the roller 2, and thus the slide is provided. The shaft 1b is provided on the slide shaft 1b by operating the shaft 1b by converting the rotational torque of the impact wrench 10 from the outside into the reciprocating motion S via the rotation / reciprocating motion converting means. The lug portion 3 guided by the slope core portion 8 is projected and retracted in the radial direction from the main body shaft 1a,
The shaft 1 can hold and release the roller 2.

[Operation] With the above configuration, the shaft 1 is provided inside the hollow of the roller 2.
To support the shaft 1 on the left and right bearing portions 4 and 5. At this time, the shaft 1 is provided with a plurality of lug portions 3 that project and retract in the radial direction, and the lug portions 3 are projected in the radial direction by an external operation to press the inner surface of the roller 2 to hold the roller 2, It is possible to rotate R together with the axes aligned.

Then, by retracting the lug portion 3 of the shaft 1, the pressure contact of the lug portion 3 with the roller 2 is released, and the holding of the roller 2 of the shaft 1 is released.

Next, the shaft 1 is removed from either the left or right bearing portion 5. At this time, the shaft 1 is still supported by the bearing portion 4 which is not removed.

Then, the roller 2 is pulled out from the bearing portion 5 of the shaft 1 and removed from the bearing. At this time, shaft 1
Since one of the rollers is still supported by the bearing portion, only the roller 2 can be pulled out, and the attachment / detachment thereof is easy.

[Embodiment] Next, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In this embodiment, the working machine is the printing machine 6.

The roller 2 to be used in the printing machine 6 includes a plate cylinder 16 such as a gravure roller or an offset roller.
And a press cylinder 15 for sandwiching the paper 13 to be printed with the plate cylinder and pressing the paper 13 against the plate cylinder, and the paper.
There are various types such as a turn roller and a pinch roller for supporting the paper 13 on the path of 13, and in this example, the roller 2 is the gravure roller.
The present invention can be implemented with other rollers, although there are differences in details.

The printing machines 6 are arranged in multiple lines, and the sheet-like body to be printed is paper.
13 and paper rollers 14 arranged at both ends of the printing machine 6
It is fed from one side and printed by the printing machine 6, is transferred from the top of one printing machine 6 to the top of another printing machine 6 and is printed again, and this is performed multiple times to perform multicolor printing. Explaining one printing machine 6 here, the plate cylinder
16 is located slightly below the center of the printing machine 6, and although not shown, ink is sucked up from the ink pan below it, excess ink is scraped off with a doctor, and printing is performed on the paper 13. The plate cylinder 16 is urged by a rotatable impression cylinder 15 above the plate cylinder 16. The paper 13 transferred to the upper part of the printing machine 6 is sent to the lower part, is brought into close contact with the plate cylinder 16 by the impression cylinder 15, and is printed as the plate cylinder 16 rotates R. Then, it is sent again to the upper part of the printing machine 6 and sent to the next printing machine 6.

Here, the gravure roller which is the roller 2 used in this embodiment will be described in detail. The gravure roller is composed of a base tube 2a which is a hard tube and a rubber tube 2b which covers the outside thereof, and both are integrated. A cell hole for filling the ink is formed on the surface of the rubber tube 2b to form a gravure plate, which is not shown. The gravure roller is supported by bearings 4 and 5 on both sides of the printing machine 6 together with the shaft 1 and rotates R to perform printing.

The shaft 1 will be described in detail. As shown in FIGS. 1, 2, and 3, the shaft 1 has a substantially cylindrical main body shaft 1a, a slide shaft 1b, and a lead screw 7a. The main body shaft 1a has a substantially cylindrical shape, and a peripheral surface thereof is provided with a window 11 through which the lug portion 3 appears and disappears.
Inside the slide shaft 1b, the lug portion 3, which will be described later,
A lead screw 7a and a key 12a are provided, and both ends thereof are supported by bearings 4 and 5.

The slide shaft 1b is provided inside the main body shaft 1a,
The slide portion 7b at one end is inserted into the main body shaft 1a. A female screw to be screwed with a lead screw 7a described later is engraved at the end of the slide portion 7b. A key 12b is provided on the slide portion 7b in the axial direction and is fitted with the key 12a provided on the inner surface of the main body shaft 1a. Further, the slide shaft 1b has two slope core portions 8
Are provided at intervals corresponding to both ends of the roller 2. The slope core portion 8 has a substantially conical shape, and its slope surface has a guide groove for fitting with a lug portion 3 described later.
8a is carved in the axial direction. On the main body shaft 1a, a portion corresponding to the slope core portion 8 and two in the axial direction are provided.
Windows 11 are formed in four places at equal intervals around the place, and a total of eight places are provided with windows 11 in which the lug portions 3 appear and disappear, and the lug portions 3 are attached to each window 11. The lug portion 3 is formed obliquely along the slope surface of the slope core portion 8 in contact with the slope surface, and further, the portion is fitted into the guide groove 8a formed on the slope surface of the slope core portion 8. Has been formed.

The lead screw 7a has a substantially cylindrical shape, and the main body shaft
It is arranged in the axial direction inside 1a and can rotate C with respect to the main body shaft 1a. A male screw engraved on one side of the main shaft 1a is screwed with the slide portion 7b of the slide shaft 1b, and the other is the main body shaft.
A concave portion is formed on the end surface of 1a that is received by a lock bearing 5 described later, and the exposed end surface is engaged with the output shaft of the impact wrench 10.

Since the shaft 1 is constructed as described above, the roller 2 is held by the shaft 1 in the following manner. First, the roller 2 is inserted into the shaft 1, and then the output shaft of the impact wrench 10 is fitted into the recess provided in the end surface of the lead screw 7a exposed on the main body shaft 1a, and the lead screw 7a is rotated C. (Refer to FIG. 1) With the rotation C of the lead screw 7a, the slide portion 7b of the slide shaft 1b that is screwed with the lead screw 7a.
Makes a reciprocating motion S. At this time, since the key groove 12b of the slide portion 7b is fitted with the key 12a of the main body shaft 1a, the slide portion 7b
b only reciprocates S with respect to the main body shaft 1a. (See FIG. 2) The reciprocating motion S of the slide part 7b causes the reciprocating motion S of the integrated slide shaft 1b and slope core part 8. Then, by the reciprocating motion S of the slope core portion 8, the lug portion 3 is guided by the slope surface and radially protrudes from the window 11 of the main body shaft 1a. At this time, the guide groove 8a of the slope core portion 8 and the lug portion 3 are fitted to each other, so that the lug portion 3 is reliably projected and retracted. Further, the lug portion 3 projects from the windows 11 provided at equal intervals around the main body shaft 1a, and is guided by the slope core portion 8 to project uniformly. The lug portion 3 thus projected is pressed against the inner surface of the roller 2 so that the shaft 2 holds the roller 2. When removing the roller 2 from the shaft 1, the impact wrench 10 is used to rotate the lead screw 7a in the direction in which the lug portion 3 is retracted, the lug portion 3 is retracted, and the lug portion 3 is pressed against the inner surface of the roller 2. Unravel and pull out the gravure roller 2 from the shaft 1.

Next, the bearings 4 and 5 will be described.

Both bearings 4 and 5 are arranged at positions to support the shaft 1 on the inner surfaces of the left and right side frames of the printing machine 5. One of the bearings 4 is a universal bearing 4, which can move the shaft 1 separately from its rotation R while supporting the shaft 1, but a conventionally used one can be used. Detailed description is omitted. The other bearing 5 is a lock bearing 5, the main body of which is formed in a substantially U-shape so that the shaft 1 can be housed therein together with the bearing case 5a. A door 5c that closes the door 5c is screwed, and a pin 5b that locks the closed state of the door 5c by penetrating the main body portion and inserting the door 5c in the closed state of the door 5c is provided.

One of the shafts 1 is supported on the universal bearing 4 by the bearings 4 and 5, and the shaft 1 is supported on the lock bearing 5.
The other side is housed with the bearing case 5a, the door 5c is closed, and the pin 5b is mounted to support the shaft 1,
Moreover, even if the pin 5b is removed from the lock bearing 5 and the door 5c is opened to take out the shaft 1 together with the bearing case 5a, one of the shafts 1 can be supported by the universal bearing 4.

When the roller 2 is replaced by the roller 2, the shaft 1, and the bearings 4 and 5 described above, it is performed as follows.

First, one side of the shaft 1 is supported by the universal bearing 4, and the other side of the shaft 1 is released from the lock bearing 5. Next, the shaft 1 is operated by the impact wrench 10 to release the holding of the roller 2 of the shaft 1. Then, the roller 2 is pulled out from the opened side of the shaft 1. After that, the roller 2 used for the next printing is inserted from the opened side of the shaft 1, and the lug portion 3 is projected and held by the operation of the impact wrench 10. Next, the shaft 1 is supported by the lock bearing 5 and locked.

As described above, according to this embodiment of the present invention, since one end of the shaft 1 can be supported by the universal bearing 4 and the other end thereof can be released from the lock bearing, the roller 2 can be replaced. At this time, the operator only has to lift the roller 2 and does not have to support the weight of the shaft 1, so that the burden on the operator can be reduced. More specifically, since one worker can lift the roller 2 to perform the replacement work, the replacement work of the roller 2 can be saved, and the time for the replacement work can be reduced. Can be shortened.

In addition, the shaft 1 is used as an impact wrench from the outside.
Since the inner surface of the roller 2 is pressed and fixed by the lug portion 3 protruding according to the operation of 10,
It is possible to remove the roller 2 from the shaft 1 without removing the collar and the ball bearing while supporting the roller or the shaft to be lifted by an operator as in the conventional case. Therefore, the burden on the worker can be reduced, so that labor for replacing the roller 2 can be saved, and the time for the replacing work can be shortened.

As described above, it is possible to save the labor of the replacement work of the roller 2, and shorten the time of the replacement work of the roller 2 to shorten the overall printing work time, that is, the printing itself by the printing machine 6. It is possible to improve the efficiency of the overall printing work including the above-mentioned roller 2
In addition, a lift device for lifting the shaft 1 is not required, and since only the minimum number of the shaft 1 required for the printing machine 6 is prepared, the roller 2 of the roller 2 can be installed without a large equipment cost. It is possible to easily save labor in replacement work and improve efficiency of overall printing work.

Furthermore, since the shaft 1 converts the rotational torque of the impact wrench 10 into the projecting force of the lug portion 3, the angle of the slope surface of the slope core portion 8 with respect to the axial direction of the shaft 1 and By appropriately adjusting the pitch and the like of the female screw of the slide portion 7b of the slide shaft 1b and the male screw of the lead screw 7b,
Since the protruding force of the lug portion 3, that is, the force by which the shaft 1 holds and fixes the roller 2 can be increased, the roller 2 can be firmly and accurately fixed.

When considering the shaft 1, it is possible to use a conventional tube type air shaft or a tubeless type air shaft, but in order to increase the accuracy of keeping the axis of the roller 2, it is adopted in the example of the present invention. It is effective to use a shaft of this type.

Further, as shown in FIG. 9, the outer surface of the shaft 1 is formed in a taper shape from one end to the other end, and the hollow inner surface of the roller 2 is also formed outside the shaft 1. It is also possible to form a taper shape that is in contact with the side surface just enough.

Further, with respect to the lock bearing 5, only one example is shown in this embodiment, and other conventional bearings can be used.

Further, with respect to the lock bearing 5, only one example is shown in this embodiment, and other conventional bearings can be used.

It should be noted that FIGS. 7 and 8 in the accompanying drawings simply show the printing machine 6 in a multiple line, and symbolically represent the positions of each gravure roller 2, the shaft 1, the bearing portions 4, 5 and the like. However, the actual printing machine 6 or the like need not be as shown in the figure.

As described above, in the present embodiment, the present invention is applied to the roller 2 used in the printing machine 6, but the present invention is not limited to the above-mentioned printing, and may be a coating roller or a laminating roller used for coating or laminating. It goes without saying that it can be applied to various rollers.

[Effect] As described in detail above, the present invention has the following effects.

According to the invention of claim 1, the shaft is rotated with respect to the working machine, and one end of the shaft is held by the working machine while the other end is attached to and detached from the working machine. By making it possible, the one removed from the working machine can be used to extract and replace the roller from the shaft. Therefore, when exchanging the rollers, the operator only has to lift the rollers to exchange the rollers, and since it is not necessary to support the weight of the shaft, it is possible to reduce the burden on the operators when exchanging the rollers. be able to.

The shaft is fixed by pressing the inner surface of the roller with a lug portion protruding by an external operation, so that the ball bearing and the collar are not attached / detached between the shaft and the roller. Therefore, since the roller can be easily and detachably fixed, it is possible to reduce the burden on the operator when the roller is replaced. As described above, without spending a large amount of equipment cost for aligning the lift device and a large number of shafts, etc., and at the same time, reducing the burden on the operator when exchanging the rollers described above, thereby saving labor for the roller exchanging operations Also, it is possible to provide a roller and a shaft therefor which can easily reduce the time.

According to the second aspect of the present invention, by using one of the bearings as a universal bearing, it becomes easier to replace the roller, and the existing universal bearing can be used. It can be realized.

Further, according to the invention of claim 3, the rotary torque of the impact wrench is converted into reciprocating motion, the slide shaft is reciprocated with a large force, and the lug is guided by the slope core portion provided on the slide shaft. Since the part is forcedly projected with a large pressure and pressed against the inner surface of the roller, it can be held firmly, and since the projection of each lug can be made uniform, the roller can be held by the shaft. Can be made stronger, and the shaft and the axis of the roller can be aligned with higher accuracy.

[Brief description of drawings]

The accompanying drawings illustrate embodiments of the present invention. 1, 2 and 3 each show only the shaft 1. 1 is a front view, FIG. 2 is an enlarged sectional view of a main part in FIG. 1 XX ′, FIG. 3 is a sectional view in FIG. 2 YY ′, FIG. 5 and 6 each show a state in which the shaft 1 and the roller 2 are supported by the bearings 4 and 5. FIG. 4 is a front view including a fracture surface of only part of the roller 2, FIG. 5 is a plan view showing a state in which the roller 2 is extracted from the shaft 1, FIG. 6 is a perspective view, FIG. 7 and FIG. FIG. 7 is a simplified view showing a multiple printing machine 6, FIG. 7 is a side view, FIG. 8 is a plan view, and FIG. 9 is a tapered shaft 1 and rollers shown as another example of the present invention. It is a side view containing the half cross-sectional view which shows 2. In the figure, 1 ... Shaft, 1a ... Main shaft, 1b ... Slide shaft, 2 ... Roller, 2a ... Base tube, 2b ... Rubber tube, 3 ... Lug section, 4 ... Universal bearing, 5 …… Lock bearing, 5a …… Bearing case, 5b …… Pin, 5c …… Door, 6 …… Printing machine, 7a …… Lead screw, 7b …… Slide part, 8 …… Slope core part, 8a …… Guide groove, 10 …… impact wrench, 11 …… window, 12a …… key, 12b …… key groove, 13 …… paper, 14 …… paper roller, 15 …… pressing cylinder, 16 …… plate cylinder, arrow mark R: rotation of the roller 2 and the shaft 1, arrow S: reciprocal movement of the slide shaft 1b, arrow C: rotation of the lead screw 7a.

Claims (3)

[Scope of utility model registration request] 1. A shaft for rotatably supporting left and right bearings in a working machine for printing, coating, laminating and the like, and supporting a hollow roller which comes into contact with an object such as a sheet-like body and other rollers. The shaft 1 is provided with a lug portion 3 which is projected and retracted in the radial direction by an external operation, and the lug portion 3 is projected in the radial direction and pressed against the inner surface of the roller 2 so that the shaft 1
The roller 2 of the shaft 1 is fixed by fixing the roller 2 to the shaft 1 and retreating the protruding lug portion 3 by aligning the axial centers of the roller 2 and the roller 2.
Is released, and the shaft 1 is removed from the other bearing part 5 while being supported by one of the left and right bearing parts 4 and 5, and the removed one is used to remove the shaft 1 from the shaft 1. A shaft for supporting a hollow roller, wherein the roller 2 is detachable. 2. One of the left and right bearings 4, 5 is a universal bearing 4, and the shaft 1 is supported even if the shaft 1 is removed from the other bearing 5.
The shaft supporting the hollow roller according to claim 1, wherein the roller 2 is detachable from the shaft 1. 3. The shaft 1 has a main body shaft 1a, a slide shaft 1b, and a rotation / reciprocating motion converting means. The slide shaft 1b is provided inside the main body shaft 1a, and only reciprocating motion S is possible with respect to the main body shaft 1a. The slide shaft 1b is provided with a plurality of slope core portions 8 at predetermined intervals and reciprocates S together, and the main body shaft 1a is provided at a portion corresponding to the slope core portion 8 at equal intervals around the periphery thereof. Has a lug portion 3 which is guided by the slope surface of the slope core portion 8 and radially protrudes and retracts from a window 11 formed in the main body shaft 1a to hold the roller 2, and thus the slide shaft 1b is externally attached. Impact Wrench From 10
Reciprocating torque S of the reciprocating torque S through the rotation / reciprocating motion converting means.
The lug portion 3 guided by the slope core portion 8 provided on the slide shaft 1b is projected and retracted in the radial direction from the main body shaft 1a by operating the shaft 1a.
The shaft for supporting the hollow roller according to claim 1 or 2, wherein the roller 2 can be held and released by the shaft.