JP2000136821A - Multi-step roller with seal function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a cost reducible and improve efficiently of replacing work in the case of replacement when wearing or the like is generated in a buffer tire in the outer periphery of a roller, in a plurality of the rollers with a seal function multi-step assembled on a rotary shaft. SOLUTION: A plurality of rollers 20 multi-step assembled on a rotary shaft 1 are rotatably supported in a condition with both side surfaces of these rollers into contact each other. A ring-shaped seal part 25 of protruded-shaped section protruded from both side surface of a buffer tire 24 is integrally molded in the buffer tire of the roller 20, and the fellow ring-shaped seal parts 25, 25 opposed to each other between contact surfaces of adjacent one roller and the other roller are mutually made in adhesion, so as to ensure seal performance by preventing various foreign matters from infiltrating between the contact surfaces. When wearing or the like is generated to cause necessity for replacement by aged use of the buffer tire 24 of the roller 20, the replacement objective roller can be easily removed from the rotary shaft 1 by eliminating adherence or the like due to the infiltrating foreign matter between the contact surfaces.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-stage roller having a sealing function used for power transmission or running of equipment in general industrial equipment and devices.

[0002]

2. Description of the Related Art Conventionally, as this kind of multi-stage roller, there is known a multi-stage roller having a sealing function capable of preventing intrusion of foreign matter, muddy water, grease lubricating oil and the like in a use environment into a mating surface between adjacent rollers. Have been. 3 and 4 are assembly sectional views showing a conventional multi-stage roller having a sealing function.

A multi-stage roller with a sealing function shown in FIG.
A plurality of rollers 2A, 2B, 2C,... Arranged in multiple stages on a rotating shaft 1 as a drive shaft are rotatably supported in contact with each other. Individual rollers 2A, 2B, 2C
.. is a ring-shaped metal hub member 3 serving as a roller cored bar
a, 3b, 3c,... on the outer peripheral surface of the cushioning tires 4a, 4
are welded. These rollers 2A,
An annular concave portion 5a is provided on one side of both side surfaces of 2B, 2C,.
5b, 5c... And the other side has annular convex portions 6a, 6b.
Are provided on the rotation axis CC in such a manner that their centers coincide with each other. The annular convex portion 6a of the roller 2A is engaged with the annular concave portion 5b of the adjacent roller 2B, and the annular convex portion 6b of the adjacent roller 2B is engaged with the annular concave portion 5c of another adjacent roller 2C. Further, each roller 2A, 2B, 2C
, And annular concave portions 5b, 5b
are mounted on the engagement surfaces with the members c,... to prevent various foreign substances from entering the engagement surfaces.

In a multi-stage roller with a sealing function shown in FIG. 4, a plurality of rollers 8A, 8B, 8C,... ing. Individual rollers 8A, 8B, 8C
... are buffer tires 10 made of a rubber-like elastic material or an elastic plastic material on the outer peripheral surfaces of ring-shaped metal hub members 9a, 9b, 9c.
a, 10b, 10c... are welded. Also, both side surfaces of the rollers 8A, 8B, 8C,... Are in contact with each other, and a sealing member 1 such as an O-ring is provided between the contact surfaces.
1a, 11b,... Are mounted to prevent various foreign substances from entering.

Incidentally, in the conventional multi-stage roller with a sealing function shown in FIGS.
a, 4b, 4c (or 10a, 10b, 10c)
…) Is worn out due to the use over time and the old and new needs to be replaced.
Replacement work to remove the battery. However, if such foreign matter or lubricating oil grease that has penetrated the engaging surface or contact surface of adjacent rollers during such replacement is fixed, it is very troublesome to remove the target roller. Becomes Further, as a structural problem, in particular, in the case of a multi-stage roller having a sealing function shown in FIG.
A, 2B, 2C,...
, And the annular convex portions 6a, 6b,..., The fitting accuracy by the engagement of the concave and convex portions is required, and there is a problem that the assembly cost is high.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to reduce the cost, and when the buffer tire on the outer peripheral wheel of the roller needs to be replaced due to wear or the like, it is easily removed to reduce the efficiency of the replacement work. An object of the present invention is to provide a multi-stage roller with a sealing function that can be improved.

[0007]

According to the present invention, there is provided a multi-stage roller having a sealing function, wherein a plurality of rollers assembled in a multi-stage manner on a drive shaft are rotatably supported with their both side surfaces in contact with each other. Is composed of a metal hub member of a roller core metal fixed on the drive shaft and a buffer tire joined to the outer periphery of the hub member, and the buffer tire has a sectional convex shape protruding from both side surfaces thereof. An annular seal portion is integrally formed, and the seals between the contact surfaces are secured by bringing the annular seal portions facing each other between the contact surfaces of one adjacent roller and the other roller into close contact with each other.
In this case, a ring-shaped spacer can be interposed at an appropriate position between the plurality of rollers. In this case, the annular seal portions of the one roller and the other roller are brought into close contact with both side surfaces of the spacer.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a multi-stage roller having a sealing function according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing a state in which a plurality of rollers 20 with a sealing function are assembled in multiple stages on a rotating shaft 1 as a drive shaft. FIGS. 2A and 2B are front views of a partial cross section of the roller alone. It is a side sectional view.

The roller 20 has a metal hub member 21 formed in a ring shape as a roller core fitted and fixed to the outer peripheral surface of the rotary shaft 1. A key groove 22 is provided on the fitting inner peripheral surface of the hub member 21, and is fixed to the outer periphery of the rotating shaft 1 by a key 23 and is prevented from rotating. Further, along the outer periphery of the hub member 21, a cushioning tire 24 made of a rubbery elastic material or an elastic plastic material is provided.
Are bonded and integrated by appropriate means such as baking and welding. On both side surfaces of the cushioning tire 24, annular seal portions 25 each of which protrudes from the side surface and have a convex cross section are integrally formed and provided. Therefore, as shown in FIG. 2, the overall width B of the roller 20 is obtained by adding the height h of each of the annular seal portions 25 on both sides to the width b of the hub member 21 and the buffer tire 24.

As shown in FIG. 1, a plurality of rollers 20 having the above configuration are assembled in a multi-stage manner in a state of contacting the outer periphery of the rotating shaft 1. By fitting and fixing the collar member 26 to one end of the rotating shaft 1, the roller 20 at the end is
Can be suppressed from the axial direction. In addition, by interposing a ring-shaped spacer 27 on the rotating shaft 1 at an appropriate position between the plurality of rollers 20, it is possible to meet design specifications between the roller 20 group at one end and the roller 20 group at the other end. Required intervals can be provided.

Due to the functions of the collar member 26 and the spacer 27, the plurality of rollers 20 are assembled in multiple stages with an appropriate contact pressure with each other. One and the other annular seal portions 2 facing each other between the contact surfaces of the adjacent rollers 20 after such assembling.
5 adhere to each other in a compressed state. The close contact between the annular seal portions 25 prevents various foreign matters, moisture, grease of lubricating oil, and the like from entering between the contact surfaces of the adjacent rollers 20. In other words, it is possible to prevent such foreign matter from entering between the contact surfaces and sticking to the side surface of the roller, thereby ensuring a required sealing property.

If one or more of the plurality of rollers 20 or some of the shock-absorbing tires 24 become worn or worn due to aging, the old and new ones are replaced. At this time, since the sealing property is secured by the annular seal portion 25 between the contact surfaces of the rollers 20, there is no sticking of various foreign matters to the side surfaces of the rollers, and the roller to be replaced is easily removed from the rotating shaft 1. It can be easily replaced with a new one.

[0013]

The multi-stage roller with a seal function according to the present invention is a multi-stage roller in which a plurality of rollers are assembled on a rotating shaft in a multi-stage manner. By forming the formed annular seal portions facing each other between the contact surfaces of the adjacent one roller and the other roller, the various seals are prevented from invading between the contact surfaces, and a required sealing property is secured. are doing. Therefore, when the buffer tire of the roller wears due to the use over time and needs to be replaced, the roller to be replaced can be easily removed from the rotating shaft because there is no fixation by the invading foreign matter between the contact surfaces. In addition, as a structural advantage, a special sealing member such as an O-ring is not required as in the conventional case, and there is no need to provide a structure for mounting such a sealing member on the roller side. Becomes

[Brief description of the drawings]

FIG. 1 is an assembled sectional view showing a multi-stage roller with a sealing function according to an embodiment of the present invention.

FIGS. 2A and 2B are a half cut front view (a) and a side cross-sectional view (b) of a roller alone according to the present embodiment in partial cross sections.

FIG. 3 is an assembled sectional view showing a conventional multi-stage roller with a sealing function.

FIG. 4 is an assembled sectional view showing another conventional multi-stage roller with a sealing function.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotation shaft 20 Roller 21 Hub member 22 Keyway 23 Key 24 Buffer tire 25 Annular seal part 26 Collar member 27 Spacer

Claims (2)

[Claims] 1. A plurality of rollers, which are multi-stage assembled on a drive shaft, are rotatably supported with their both side surfaces in contact with each other, and each roller is fixed on the drive shaft and is made of metal of a roller core metal. A multi-stage roller comprising a hub member and a buffer tire as an outer peripheral wheel joined to an outer periphery of the hub member, wherein an annular seal portion having a convex cross section protruding from both side surfaces thereof is integrally formed on the buffer tire, and the adjacent one A multi-stage roller with a sealing function, wherein a sealing property between the contact surfaces is secured by bringing the annular seal portions facing each other between the contact surfaces of the roller and the other roller into close contact with each other. 2. The sealing function according to claim 1, wherein a ring-shaped spacer is interposed at an appropriate position between the plurality of rollers, and annular seal portions of one roller and the other roller are brought into close contact with both side surfaces of the spacer. With multi-stage roller.