JP2539760B2 - Brake built-in type bearing and roller device assembled with it - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing having a built-in brake for stopping or decelerating a rotating roller, or maintaining the stopped state of the roller, and a roller device in which the bearing is assembled.

[0002]

2. Description of the Related Art A plurality of guide rollers are used to guide web-shaped materials and products in printing machines, various paper-making machines, and film and metal foil processing machines. Two types of guide rollers are used, a drive roller driven by power and a free roller rotated as the web travels. Further, the structure of the free roller is roughly classified into the following two types. The first free roller is formed by integrally forming a roller body and a roller shaft, and rotatably supports the roller shaft on a bearing attached to a machine frame. The second free roller has a roller body rotatably attached to a roller shaft via a bearing, and the roller shaft is fixed to the machine frame in a non-rotating state. Some of these guide rollers need to be braked during operation to brake the rotation, and to stop or decelerate the rotation, and various braking devices are used for that purpose. This type of guide roller is proposed, for example, in Japanese Patent Laid-Open Nos. 62-132644 and 2-202451.

[0003]

By the way, in the conventional braking means for the guide roller, either the roller body or the roller shaft portion is pressed by the pressing member to brake the roller,
Instead of directly acting the pressing member on the roller main body or the roller shaft, a pressed member is attached to the roller main body or the roller shaft, and the pressing member acts on this. In the braking means having such a structure, since a roller pressing member and a pressed member are provided, a large space is required around the roller,
Depending on the place where the roller is installed, there are problems that it is difficult to install the braking device due to space, or the workability is impaired. An object of the present invention is to provide a bearing with a built-in brake that enables rotational braking of a roller body using an outer race and an inner race. Another object of the present invention is to provide a roller device having a built-in brake type bearing in which a bearing of the roller body and a brake mechanism are integrated.

[0004]

In order to achieve the above-mentioned object, the present invention according to claim 1 is an inner race,
In a bearing including an outer race and a rolling member provided between the inner race and the outer race,
A brake portion is provided between the outer race and the inner race adjacent to the rolling member, and the brake portion applies a brake to the rotation between the inner race and the outer race.

Another invention is characterized in that, in the invention described in claim 1, any one of the following configurations is provided. (1) The brake section includes an expansion member provided on the inner race side and an air passage for injecting air into the expansion member, and the air is injected into the expansion member to expand the expansion member, and the outer peripheral surface of the expansion member is It has a structure in which the brake is applied by pressing it against the inner surface of the outer race. (2) The brake section includes an expansion member provided on the inner race side, a brake shoe provided between the expansion member and the outer race, and an air passage for injecting air into the expansion member. Is inflated by injecting air, and the brake shoe is pressed against the inner surface of the outer race to apply the brake. (3) The air passage is provided through the inside of the non-rotating shaft. (4) The air passage is provided in the inner race. (5) The expansion member has a tubular shape. (6) The expansion member has a holding portion formed on both side edges fixed to the outer periphery of the inner race and a brake acting portion formed continuously with the holding portion, and the brake acting portion is formed by injecting air. Is inflated to apply the brake to the inner surface of the outer race. (7) The brake shoe is divided into a plurality of parts in the circumferential direction, each spring is provided with a spring for urging the brake shoe in the inner race direction, and the elastic force of the spring separates the brake shoe from the inner surface of the outer race when the brake is not operated. It is in such a configuration.

According to a ninth aspect of the present invention, in a bearing including an inner race, an outer race, and a rolling member provided between the inner race and the outer race, the bearing is adjacent to the rolling member. A brake portion is provided between the outer race and the inner race, and the brake portion is fixed to the outer race side, a brake shoe movably provided facing the brake wheel, and the brake shoe. And a brake operation means for applying a brake.

According to a tenth aspect of the present invention, in the roller device, the roller shaft is rotatably supported on the machine frame by the bearing having any one of the above-mentioned constitutions, and the roller shaft is fixed to the roller main body. Alternatively, it is formed integrally with the roller body. According to an eleventh aspect of the present invention, there is provided a roller device in which a roller body is rotatably held on a roller shaft by a bearing having any one of the above configurations, and the roller shaft is fixed to a machine frame. It is in.

[0008]

According to the structure of the bearing with a built-in brake according to the present invention, the brake is applied to the rotation between the inner race and the outer race, so that the braking mechanism for the roller body is simplified. , The restriction on the mounting space of the braking mechanism is greatly eased. Further, according to the configuration of the roller device according to the present invention, since it can be used only by mounting the bearing with built-in brake and providing air piping,
The device configuration is simplified, and the workability of attaching the brake mechanism to the roller device is improved.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) FIG. 1 shows the structure of a built-in brake type bearing applied to a roller device having a structure in which a roller body is rotatably held on a fixed roller shaft. FIG. 2 shows I-I of FIG.
3 shows a cross section. In this embodiment, the outer peripheral surface of the tubular expansion member is directly pressed against the inner surface of the outer race to apply a brake. A roller shaft 21 forming a guide roller 2 is fixed to the machine frame 1 in a non-rotating state.
Brake built-in bearing (hereinafter referred to as bearing)
The roller main body 22 is rotatably held via the roller 3. The roller shaft 21 is the inner race 31 of the bearing 3.
And the stop ring 23 prevents movement in the thrust direction.

The bearing 3 has a structure in which a rolling portion and a braking portion arranged adjacent to the rolling portion are integrated. A retainer 34 is provided between the inner race 31 and the outer race 32, which form the rolling portion and the braking portion.
A bearing ball 35 and a tubular expansion member 37, which are held at a predetermined interval by, are provided. The outer race 32 is rotatably supported on the inner race 31 by bearing balls 35. Expansion member 37
The outer peripheral portion of the outer race has a braking action with the inner surface of the outer race, and the inner periphery of the outer race is held on the outer peripheral surface of the inner race by bonding or fitting by projections.
The air inlet portion of the expansion member 37 is inserted into the air passage 40b of the inner race 31, is connected to an air source capable of controlling air supply, and air is injected through the inside of the roller shaft 21.

In FIG. 2, an air passage 40 for supplying air to the expansion member 37 has an air inlet 41 for penetrating the center of the roller shaft 21 and for injecting air into the shaft end. A radial air passage 40a extending from 40 in the radial direction of the roller shaft 21 and an air passage 40b for connecting the air passage and the expansion member are provided in the inner race 3.
It is provided in 2.

FIG. 4 shows another embodiment of supplying air to the expansion member. In this embodiment, air is sent to the expansion member from an air inlet provided in the outer race. An air inlet 41 of an air passage 40c leading to the expansion member 37 is provided on the end surface of the inner race 31. The air inlet 41 is connected to the air source. As described above, since the air is supplied from the air inlet of the inner race without passing through the inside of the roller shaft 21, it is not necessary to process the roller shaft for supplying the air, and the cost can be reduced.

FIG. 5 shows an application of the bearing with a built-in brake according to the present invention to a roller device having a shaft-integrated roller body. The bearing 3 is fixed to the machine frame 1, and the roller shaft 21 is rotatably supported via the bearing 3. The air is injected into the expansion member 37 through the air passage 40 formed in the roller shaft 21. Incidentally, it is of course possible to adopt a structure in which the air injection is performed from the air injection port provided in the inner race 31 shown in FIG. Further, the shaft-integrated roller body may be formed by integrally molding the roller shaft and the roller body, or may be formed by fixing the roller shaft to the roller body separately from the roller body.

Next, the operation of the first embodiment will be described. When air is not supplied, a gap g shown in FIG. 1 is formed between the outer peripheral surface of the tubular expansion member 37 and the inner surface of the outer race. At this time, the braking force is released and the non-braking operation state is set. When the brake is not applied, the guide roller can be freely rotated by the bearing. On the other hand, when air is injected, the expansion member swells as shown in FIG. 3, and the outer peripheral portion of the expansion member is pressed against the inner surface of the outer race,
The guide roller is braked by the frictional force at this time. The braking mode of the guide roller enables braking suitable for the purpose of use by controlling the supply of air. That is, when air is continuously supplied, braking is continuously performed, and when air is intermittently supplied, intermittent braking is performed.

(Embodiment 2) FIG. 6 shows a structure of a built-in brake type bearing using an annular expansion member having a U-shaped cross section, and a roller device equipped with the bearing. In this embodiment, the braking portion is composed of an annular expansion member having a U-shaped cross section. The members having the same functions as those in the first embodiment are designated by the same reference numerals, and the description thereof will be appropriately omitted. On the bearing ball arrangement side of the inner race 31, the first holding member 3 for fixing the holding portion 372 forming one peripheral edge of the expansion member 370.
The second holding member 375 is fixed to the inner race 31 at the other end of the inner race 31 by fixing the second holding member 375 for fixing the holding portion 373 forming the other peripheral edge of the expansion member.
The expansion member 370 is formed continuously with the holding portions 373 and 374 which are supported by the holding members 374 and 375 in close contact with the surface of the inner race 31, and is pressed by a predetermined width of the inner surface of the outer race to apply a brake. It has a braking portion 376.

Next, the operation of the second embodiment will be described. Since the expansion member is contracted when air is not injected, a gap g shown in FIG. 6 is formed between the outer race 32 and the outer peripheral portion of the expansion member 370. At this time, the braking force is released and the non-braking operation state is set. When the brake is not applied, the roller body 22 can be freely rotated by the bearing 35. On the other hand, when air is injected, as shown in FIG.
As shown in FIG. 7, the expansion member 370 expands, the braking action portion 376 of the expansion member is pressed against the inner surface of the outer race 32, and the frictional force at this time brakes the guide roller.

(Embodiment 3) FIG. 8 shows the structure of a built-in brake type bearing in which the expansion member is expanded to press the brake shoe against the inner surface of the outer race to apply the brake, and a roller device equipped with the bearing. . A guide roller 2 is rotatably supported on a machine frame 1 by a built-in brake type bearing (hereinafter referred to as a bearing) 3. The guide roller 2 is composed of a roller shaft 21 integrally formed with or fixed to a roller body 22. Roller shaft 21
Is fitted to the inner race 31 of the bearing 3, and the stop ring 23 prevents movement in the thrust direction. On the other hand, the outer race 32 of the bearing 3 is fitted into the shaft hole provided in the machine casing 1, and both side surfaces of the outer race 32 are attached to the machine casing 1.
It is supported by a holding member 33 which is screwed to. Here, since the inner race 31 is supported by the roller shaft 21 and the outer race 32 is supported by the shaft hole of the machine frame 1 in a non-rotating state, a tight fit is used.

The bearing 3 has a structure in which a rolling portion formed of, for example, a bearing ball and a braking portion arranged adjacent to the rolling portion are integrated. A bearing ball 35 and a brake shoe 36, which are held at a predetermined interval by a retainer 34, are arranged between the inner race 31 and the outer race 32, which constitute the rolling portion and the braking portion, and the outer race is supported by the bearing ball 35. The inner race 31 is rotatably supported with respect to the race 32. An annular expansion member 371 is provided between the brake shoe 36 and the inner race 31. The expansion member 371 is expanded by the air supplied through the inside of the roller shaft 21 to operate the brake shoe 36,
Apply the brake by pressing the brake shoe 36 against the outer race 32.

The air passage 40 for injecting air into the expansion member 371 is provided with an air injecting 41 for penetrating the center of the roller shaft 21 and injecting air into the shaft end. A radial air passage 40a extending in the radial direction and an air passage 40b for connecting the air passage and the expansion member are provided in the inner race. A rotary joint (not shown) is attached to the opening 41 at the end of the roller shaft, and an air pipe is provided through the rotary joint to connect to an air source. Next, the operation of the third embodiment will be described. When the air is not injected, the expansion member 371 is contracted, so the braking force on the brake shoe 36 is released, and a gap is created between the outer race and the brake shoe as shown in FIG. Not braking. When the brake is not applied, the guide roller can be freely rotated by the bearing. On the other hand, when air is supplied, the expansion member swells as shown in FIG.
The brake shoes are pressed against the inner surface of the outer race to brake the guide rollers.

(Embodiment 4) FIG. 11 shows the structure of a built-in brake type bearing in which the brake is released by the contraction of the expansion member and the action of the spring when the brake is not actuated, and the bearing around the fixed roller shaft. An example of applying the above to a roller structure configured such that the roller body rotates. In FIG. 12, the right half surface is the BB cross section of FIG.
The left half surface shows the CC cross section of FIG. The members having the same functions as those of the guide roller shown in FIG. 8 are designated by the same reference numerals, and the description thereof will be omitted as appropriate. Guide roller 2 is machine frame 1
Is provided with a roller shaft 21 fixed in a non-rotating state,
The roller body 2 is mounted on the roller shaft 21 via the bearing 3.
2 is rotatably supported. The bearing 3 includes a rolling portion and a braking portion. The braking portion is provided with an annular expansion member 371 on the inner race side, and a plurality of brake shoes are circumferentially divided along the outer peripheral portion of the expansion member 371. Three
6A is provided.

A groove 39 is formed in the circumferential direction on the surface of each brake shoe facing the inner surface of the outer race.
An annular coil spring 42 is contained in this groove 39. The coil spring 42 is provided with elastic force so as to move the entire brake shoe to the inner race side. According to the above roller structure, when the expansion member is contracted, the brake shoe is separated from the inner surface of the outer race as shown in the figure, and the non-braking state is maintained. On the other hand, when the brake is actuated, air is supplied to inflate the expansion member, and the brake shoe is moved against the elastic force of the coil spring and pressed against the inner surface of the outer race to apply the brake.

(Embodiment 5) FIG. 13 shows the construction of another embodiment of the braking portion of the bearing. The present embodiment is characterized in that the brake shoe is operated by a mechanical mechanism. The brake device 50 includes the roller body 22.
The brake wheel 50a is arranged on the outer race which is fixed to the non-rotating state by the brake wheel 50a.
A brake shoe 50b is provided to face the above. The brake shoe 50b is provided with a brake shoe arm 51 that projects toward the end surface side of the roller body 22. The direction in which the brake shoe arm 51 projects is parallel to the roller shaft, and the arm end is connected to the link mechanism 52. .

The link mechanism 52 includes a ring-shaped arm 53 to which the ends of the brake shoe arm 51 are connected, and the ring-shaped arm 53 is arranged coaxially with the roller shaft 21. The ring-shaped arm 53 is rotatably supported by a split blanket 54 fixed to the roller shaft. Here, the supporting position of the ring-shaped arm 53 and the split blanket 54 and the connecting position of the ring-shaped arm 53 and the brake shoe arm 51 are in an orthogonal relationship. The cylinder rod 55a of the air cylinder 55 is connected to the member 53a on the opposite side of the ring-shaped arm with respect to the supporting position. The air cylinder 55 is attached to the machine frame 1 via a spacer 55b.

OFF when the air cylinder is OFF
Since the cylinder rod is moving in the direction, the brake shoe is in the position shown in the drawing in the direction b, the brake shoe is separated from the brake wheel, and the non-braking state is maintained. When the air cylinder is ON, the cylinder rod moves in the ON direction in the figure, so the brake shoe is actuated in the a direction and pressed against the brake wheel to apply the brake.

(Embodiment 6) FIG. 15 shows the construction of another embodiment of the brake shoe. In this embodiment, the braking surface of the brake shoe is widened to improve the braking effect.
Members having the same functions as those of the bearing shown in FIG. 13 are designated by the same reference numerals, and the description thereof will be appropriately omitted.
The brake device 60 is disposed on an outer race on the roller body side, and a brake wheel 60a fixed to an outer race on the roller body side, and a brake shoe 60b fixed on the non-rotating inner race 31 on the roller shaft side.
It consists of The brake wheel 60a and the brake shoe 60b have inclined braking surfaces facing each other. Therefore, the braking area is wider than that of the structure shown in FIG. 13, and the braking effect is improved. The braking action of this embodiment is the same as that of the built-in brake type bearing shown in FIG.

Next, the embodiments of Examples 5 and 6 will be described. (1) The air cylinder, which is the brake driving means, has a structure to be attached to the machine frame. However, as shown in FIG. 16, an attachment portion 21b may be provided on the roller shaft and fixed there. (2) Instead of the air cylinder, an electromagnetic actuator such as a magnet may be used. (3) The drive source may be attached near the guide roller, and its power may be transmitted to the brake built-in bearing via a link mechanism. (4) The brake actuating mechanism may be a manual type configured by coupling a lever and a link. Next, another embodiment of the present invention will be described. (1) The mounting position of the brake built-in type bearing is between the roller shaft and the roller body, but a structure integrated with the shaft may be used. In this case, a rotary joint is used to supply air to the roller shaft. (2) Although the rolling portion of the bearing uses a bearing ball, it may be a roller bearing.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a roller to which a built-in brake type bearing according to a first exemplary embodiment of the present invention is applied.

FIG. 2 is a cross-sectional view taken along the line I-I of FIG.

FIG. 3 is an explanatory diagram of the first embodiment when a brake is actuated.

FIG. 4 is a cross-sectional view showing another specific example of air supply to the expansion member applied to the first embodiment.

FIG. 5 is a sectional view showing an embodiment of a bearing applied to a roller device in which a shaft is integrated with a roller body.

FIG. 6 is a sectional view of a roller to which a built-in brake type bearing according to a second exemplary embodiment of the present invention is applied.

FIG. 7 is an explanatory diagram of the second embodiment during a brake operation.

FIG. 8 is a cross-sectional view of a roller to which a built-in brake type bearing according to a third embodiment of the invention is applied.

9 is a cross-sectional view taken along the line AA of FIG. 7 during non-brake operation.

FIG. 10 is an enlarged cross-sectional view of a brake portion when the brake is operated.

FIG. 11 is a cross-sectional view showing another embodiment of the roller to which the built-in brake type bearing according to the fourth embodiment of the invention is applied.

12 is a cross-sectional view taken along the line BB and the line CC of FIG.

FIG. 13 is a cross-sectional view of a roller to which a built-in brake type bearing according to a fifth embodiment of the invention is applied.

FIG. 14 is a cross-sectional view taken along the line DD of FIG.

FIG. 15 is a cross-sectional view of a roller to which a built-in brake type bearing according to a sixth embodiment of the invention is applied.

FIG. 16 is a sectional view showing another embodiment of the mounting structure of the air cylinder as the brake driving means.

[Explanation of symbols]

1 ... Machine frame, 2 ... Guide roller, 3 ... Brake built-in bearing, 31 ... Inner race, 32 ... Outer race, 35 ... Bearing ball, 34 ... Retainer, 36
... Brake shoes, 37 ... Expansion members for directly exerting braking action on the outer peripheral surface, 40, 40a, 40b ... Air passages, 42
... Spring, 50, 60 ... Brake device, 50a, 6
0a ... Brake wheel, 50b, 60b ... Brake shoe, 52 ... Link mechanism, 55 ... Air cylinder, 370
... Expansion member having a U-shaped cross section, 371 ... Expansion members for exerting a brake via brake shoes, etc., 372, 373
... Retaining portion of expansion member, 374, 375 ... Retaining member, 37
6 ... Brake action part

Claims (11)

(57) [Claims] 1. An inner race and an outer race,
In a bearing including a rolling member provided between the inner race and the outer race, a brake unit is provided between the outer race and the inner race adjacent to the rolling member, and the brake unit is the inner race. A built-in brake type bearing that brakes against rotation between outer races. 2. The built-in brake type bearing according to claim 1, wherein the brake section includes an expansion member provided on the inner race side, and an air passage for injecting air into the expansion member. A bearing with a built-in brake, characterized in that the brake is applied by injecting and inflating, and pressing the outer peripheral surface of the expanding member against the inner surface of the outer race. 3. The bearing with built-in brake according to claim 1, wherein the brake portion has an inflating member provided on the inner race side, a brake shoe provided between the inflating member and the outer race, and the inflating member. An air passage for injecting air, wherein air is injected into the inflating member to inflate the air, and the brake shoe is pressed against the inner surface of the outer race to apply a brake. 4. The built-in brake type bearing according to claim 2, wherein the air passage is provided through the inside of the non-rotating shaft. 5. The built-in brake type bearing according to claim 2 or 3, wherein an air passage is provided in the inner race. 6. The built-in brake type bearing according to claim 1, wherein the expansion member has a tubular shape. 7. The bearing with built-in brake according to claim 1, wherein the expansion member is formed with a holding portion formed on both peripheral side edges fixed to the outer periphery of the inner race, and a braking action continuously formed with the holding portion. A bearing with a built-in brake, characterized in that the brake acting portion expands when air is injected to apply a brake to the inner surface of the outer race. 8. The built-in brake type bearing according to claim 3, wherein the brake shoe is divided into a plurality of pieces in the circumferential direction, and each spring has a spring for urging the brake shoe in the inner race direction. A built-in brake type bearing that separates the brake shoe from the inner surface of the outer race by elastic force. 9. An inner race and an outer race,
In a bearing including a rolling member provided between the inner race and the outer race, a brake portion is provided between the outer race and the inner race adjacent to the rolling member, and the brake portion is located on the outer race side. A brake wheel fixed to the brake wheel, a brake shoe movably provided facing the brake wheel, and a brake operating means for actuating the brake shoe to apply a brake. Brake built-in bearing. 10. The bearing according to claim 1, wherein the roller shaft is rotatably supported by the machine frame, and the roller shaft is fixed to the roller body or integrally formed with the roller body. A roller device characterized in that 11. The bearing according to claim 1, wherein the roller body is rotatably held on a roller shaft, and the roller shaft is fixed to a machine frame. Roller device.