JPH06135530A - Roller device for sliding way - Google Patents

Abstract

PURPOSE:To prevent a roller from being rotated reversely by applying rotational resistance which meets with the inclination of an inclined surface to the roller. CONSTITUTION:This roller device is provided with a roller 200 and a support device which supports both the ends of the roller so as to rotate, and at least one end of the support device is equipped with a roller bearing clutch 100 provided with an inner ring 101, an outer ring 102, a roller 103, a pre-load spring 104, and a torque adjusting bolt 105. A roller is installed at the outer ring through an external tube 109, the internal diameter side of the inner ring 101 is formed in a hexagonal shape, in which the hexagonal part of an installation bolt which is mounted at a fixed member by screwing or the like is inserted. This part restricts the rotation of the inner ring, and supports the inner ring in a center shaft 106 direction so as to move freely. It, is thus possible to apply appropriate rotational resistance, and prevent the carried article from being crashed or caught in the roller by preventing the roller 200 from being rotated reversely.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slide roller device having a roller and a supporting device for rotatably supporting both ends of the roller.

[0002]

2. Description of the Related Art A roller slide is one that rolls and conveys a conveyed object over a distance of many kilometers by utilizing the slope of a mountain, etc. However, since the conventional roller slide has a roller conveyor structure, the slope inclination is It was difficult to control the falling speed of the conveyed object by giving the rotation torque corresponding to the above to the roller, and there was a risk of a collision accident. Further, since the roller is made of rubber and is not provided with a reverse rotation preventing function, there is a possibility that the conveyed product may be caught.

[0003]

DISCLOSURE OF THE INVENTION The present invention solves the above problems in the prior art, and is capable of accurately and stably imparting a rotational resistance with a simple structure, and at the same time, a roller for a slide which is prevented from reversing. An object is to provide a device.

[0004]

In order to solve the above problems, the present invention provides a slide roller device comprising a roller and a supporting device for rotatably supporting both ends of the roller. At least one of the supporting devices to be supported has an inner ring, an outer ring, a roller, a biasing means, and an adjusting means, and the inner ring has a unilateral rotating hyperboloid about its central axis. A raceway surface is provided, the outer race is provided with an outer raceway surface that forms a single-leaf rotation hyperboloid around the central axis so as to form a raceway with the inner race, and the roller has a cylindrical rolling surface. In the raceway, a plurality of center lines of the rollers are arranged in the circumferential direction of the raceway with a certain angle of inclination from a cross section including the central axis, and the surfaces of the rollers are the inner raceway surface and the outer raceway surface. Contacting linearly, the biasing means, Note that the inner ring or the outer ring is biased in the direction of the central axis and in the direction of narrowing the space between the raceways, and the adjusting means makes it possible to increase or decrease the biasing force of the biasing means. The roller is attached to one of the two, and the other is supported so as to be restricted from rotating and movable in the central axis direction.

[0005]

According to the present invention, at least one of the supporting devices for rotatably supporting both ends of the roller includes an inner ring, an outer ring, rollers, a biasing means, and an adjusting means.
The inner ring and the outer ring are configured so that the respective surfaces where they face each other are single-leaf revolving hyperboloids, and a plurality of rollers are inclined in a raceway formed on both sides to make line contact with both raceway surfaces. And acts as a rolling bearing clutch with a torque absorbing function. For example, when the inner ring is fixed so as to be movable in the direction of its central axis, the rotational torque is transmitted from the conveyed object on the roller slide to the outer ring through the rollers, and the outer ring rotates toward the free rotation side. The rollers are guided by the raceways of the inner and outer rings and revolve while rotating on their respective surfaces, and due to their inclination, they travel in opposite axial directions with respect to the inner and outer rings. As a result, a separation force is generated between the inner ring and the outer ring due to the relationship between the roller inclination direction and the outer ring rotation direction. Since the inner ring is movable in the axial direction, the inner ring moves in the axial direction and tries to widen the track interval.

However, since the biasing means biases the inner ring in such a direction as to narrow the track spacing, the track spacing does not widen, and the outer ring is biased by the biasing means from the inner ring whose rotation is restricted. The rotation resistance corresponding to the power is given. And
Since the urging force of the urging means can be increased or decreased, the urging force of the urging means can be increased or decreased to adjust the rotation resistance so as to match the inclination of the portion of the roller slide where the slide roller device is attached. it can.

By the way, in such a rotation resistance, the inner ring or the outer ring is urged by the urging means to narrow the raceway distance, and a surface pressure is generated between the roller and the inner / outer ring raceway surface. It is caused by sliding friction and rolling friction with the ring raceway surface. The sliding friction and the rolling friction are generated in proportion to the surface pressure, and there is a constant relationship between the urging force and the surface pressure. Therefore, if the dimensions of the support device are determined, the urging force required to provide the rotational resistance suitable for the inclination can be calculated. In this case, the sliding friction is the friction when the rollers arranged at an inclination move in the axial direction, but at this time, the rollers rotate easily, so the friction coefficient is different between the stationary state and the moving state. Since there is no difference, accurate and stable rotation resistance is always generated against the biasing force of the biasing means.

On the other hand, when a torque is applied to the roller in the direction for reversing the roller from a conveyed object for some reason, a reverse torque acts on the outer ring via the roller in the opposite manner to the above. However, at this time, contrary to the above, since a pulling force is generated between the inner and outer rings, the orbital spacing of the inner and outer rings narrows immediately after the reverse rotation under the action of the biasing force of the biasing means, and the clutch between the inner and outer rings is clutched. Since the rotation of the inner ring is fixed, the reverse rotation of the outer ring is prevented.

[0009]

EXAMPLE FIG. 1 shows an example of a slide roller device of the present invention. The apparatus of the present embodiment includes a roller 200 and a supporting device that rotatably supports both ends of the roller 200, and at least one of the supporting devices is the inner ring 1
01, an outer ring 102, a roller 103, a preload spring 104 as an urging means, and a torque adjusting bolt 105 as an adjusting means, a one-way clutch (hereinafter referred to as “rolling bearing clutch”) 100 with a torque absorber. is there. Therefore, the opposite side of the roller bearing clutch 100 in the roller 200 may be a bearing that only rotatably supports the roller 200.

The inner ring 101 is provided with an inner ring raceway surface 101a forming a single-leaf rotating hyperboloid around the central axis 106. The outer ring 102 is provided with an outer ring raceway surface 102a forming a single-leaf rotating hyperboloid around the central axis 106 so as to form a raceway 107 with the inner ring raceway surface 101a.

The rolling surface of the roller 103 is cylindrical, and the center line of the roller 103 is the central axis 1 in the raceway 107.
A plurality of them are arranged in the circumferential direction of the track with a certain angle β (for example, 15 °) from the cross section including 06, and the surfaces thereof come into linear contact with the inner ring raceway surface 101a and the outer ring raceway surface 102a. ing. Further, the rollers 103 are arranged so that the rollers 108 rotate smoothly without interfering with each other.
Positions are maintained between the two.

Raceway surfaces 101 of inner ring 101 and outer ring 102
As described above, a and 102a are respectively hyperbolas shown in the following equations so as to be in linear contact with the roller 103 and the central axis 106.
It is a single-leaf rotating hyperboloid rotated around. yi ² / ai ² −xi ² / bi ² = 1 yo ² / ao ² −xo ² / bo ² = 1 where x _i and x _o are the inner ring raceway surface 101 a,
The distances y _i and y _o from the origin of the outer ring raceway surface 102a in the direction of the central axis 106 are the inner ring raceway surface 101a and the outer ring raceway surface 102a in an arbitrary cross section including the central axis 106, respectively.
From the central axis 106 of a, ai, bi, ao, b
o is a constant. F = 9, r =, where F is the distance from the central axis 106 to the center of the track 107 on the reference surface (the origin plane of the hyperbola) on the small diameter side of the inner and outer rings, the radius of the roller 103 is r, and the inclination angle is β. When the calculation is performed for 1.5 and β = 15 ° (the calculation is complicated, the description is omitted), ai, bi,
The values of ao and bo are about 7.5, 30.1, and 1 respectively.
It becomes 0.5 and 37, and the shape of the single-leaf rotating hyperboloid of the inner and outer ring raceways is given.

A roller 20 is provided on either the inner ring or the outer ring.
0 is attached and the other is supported so as to be movable in the central axis direction. In the present embodiment, the outer ring 10 is provided via the outer cylinder 109.
2 is equipped with a roller 200, while the inner ring 101
Is movably supported in the direction of the central axis 106. That is, the outer cylinder 109 is attached to the outer ring 102 with the bolt 110, and the core metal portion 2 of the roller 200 is attached to the small diameter portion of the outer cylinder 109.
00a is fitted. In addition, the inner diameter side of the inner ring 101 is 6
As shown in FIG. 2, it is formed into a rectangular shape, and 6 of the tip portion of the installation bolt 300 attached to the fixing member 400 such as a guide rail for guiding the conveyed object by screwing or the like.
The corner portion 300a is inserted to prevent the inner ring 101 from rotating at this portion, and the inner ring 101 is supported so as to be movable in the direction of the central axis 106. As a method of restraining the rotation of the inner ring 101 so as to be movable in the axial direction, there is a method of providing a ball spline, an involute spline, or other torque transmitting means in addition to providing a hexagonal fitting portion as described above. You may use the method of.

The preload spring 104 urges the inner ring 101 through a thrust bearing 111 and a thrust receiver 112 in a direction (a right-to-left direction in the drawing) that narrows the space between the tracks 107 in the direction of the central axis 106. . Preload spring 1
The opposite side of the thrust receiver 112 of No. 04 is pressed against the torque adjustment bolt 105.

The torque adjusting bolt 105 is screwed to the outer cylinder 109 and has a hexagonal recess 105a on the preload spring 104 side.
have. Then, the rotation resistance torque to be applied is adjusted by fitting a hexagon wrench or the like into the recess 105a from the outside,
This can be done by rotating the torque adjustment bolt 105 and adjusting the spring force of the preload spring 104. Note that reference numeral 113 is a dust cover that prevents dust from entering the rolling bearing clutch.

Next, the relationship between the biasing force of the preload spring 104 and the rotational resistance torque generated between the inner and outer rings will be described. As shown in FIG. 3, the biasing force that biases the inner and outer rings in the axial direction is P,
When the contact angle of the roller 103 is θ, a vertical force N = P / sin θ acts on the roller 103. By this vertical force N,
A rolling frictional force μ exists between the roller 103 and the outer ring 102.
₁ N is generated in the rotational direction and sliding friction μ ₂ N is generated in the axial direction. As a result, a force as shown in FIG. 7C acts on the outer ring 102 to generate a resultant force F, which balances with the force F ′ for rotating the inner and outer rings. Therefore, the torque T transmitted between the inner and outer wheels
Is T = F · PCD / 2, where PCD is the distance between the rolling friction centers of the outer ring 102 and 103. In this case, the friction coefficients μ ₁ and μ ₂ can be obtained by experiments or the like, but because rolling friction is applied, they are extremely stable values with no difference between a stationary state and a moving state. This formula gives
By determining the angles, dimensions, etc. determined by the structure of the rolling bearing clutch and the biasing force P by the preload spring 104, the desired rotational resistance torque T can be obtained with high accuracy.

With the above structure, the sliding roller device operates as follows. When the conveyed object descends on the roller slide and the roller 200 rotates, the rotation is transmitted to the outer ring 102 via the outer cylinder 109, and the outer ring 102 rotates freely. Since the rotation of the inner ring 101 is constrained, the rotation of the outer ring 102 causes the rollers 103 to rotate, and a force is applied between the inner and outer rings via the rollers 103 in a direction in which the orbital spacing increases. However, since the inner ring 101 is biased by the preload spring 104 in the direction in which the track interval is narrowed, by appropriately setting the biasing force, the outer ring 102 receives the rotational resistance as described above. become. Such rotation resistance can be adjusted by adjusting the urging force of the preload spring 104 with the torque adjustment bolt 105, whereby the roller 200 has an appropriate rotation resistance according to the inclination of the place where the slide roller device is installed. Can be given.

On the other hand, when the roller 200 receives a force to rotate in the opposite direction from the above due to some kind of movement of the conveyed object, the rotating force causes the outer ring 102 to rotate in the opposite direction, but the outer ring 102 rotates in the reverse direction. Then, a force that narrows the raceway gap is generated between the inner and outer races, and the biasing force of the preload spring 104 is also applied to narrow the raceway gap between the inner and outer races. As a result, it is possible to prevent the inclusion of conveyed articles.

In the above description, the inner ring 101 is movable in the axial direction and is biased by the preload spring 104, but the outer ring 102 is movable in the axial direction and is biased by the preload spring. You can also do so. Further, although the roller 200 is attached to the outer ring 102 side to support the inner ring 101, on the contrary, the roller 20 is attached to the inner ring 101.
It is also possible to have a structure in which 0 is attached and the outer ring 102 is supported.

[0020]

As described above, according to the present invention, by providing a supporting device having a simple structure similar to a rolling bearing on at least one end side of the roller, it is possible to adapt to the inclination of the place where the sliding roller device is installed. The rotation resistance can be imparted and the reverse rotation of the roller can be prevented, so that the collision of the conveyed object and the involvement of the roller can be prevented.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a slide roller device according to an embodiment.

FIG. 2 is a cross-sectional view showing a structure of a mounting portion of the slide roller device.

3 (a) to 3 (c) are explanatory views for explaining the relationship between biasing force and rotation resistance.

[Explanation of symbols]

 100 Rolling bearing clutch (supporting device) 101 Inner ring 101a Inner ring raceway surface 102 Outer ring 102a Outer ring raceway surface 103 Roller 104 Preload spring 104 (biasing means) 105 Torque adjusting bolt (adjusting means) 106 Central shaft 107 Raceway 200 Roller

Claims (1)

[Claims] 1. A slide roller device including a roller and a supporting device that rotatably supports both ends of the roller, wherein at least one of the supporting devices that supports the both ends is an inner ring, An outer ring, a roller, a biasing unit, and an adjusting unit, wherein the inner ring has an inner raceway surface that forms a single-leaf rotation hyperboloid around its central axis, and the outer ring is between the inner ring and the inner ring. An outer ring raceway surface forming a single-leaf rotation hyperboloid around the central axis so as to form a raceway, the roller has a cylindrical rolling surface, and the center line of the roller in the raceway is a cross section including the central axis. A plurality of them are arranged in the circumferential direction of the raceway inclining from the inner ring raceway surface to the outer ring raceway surface linearly, and the urging means is the inner ring or Set the outer ring in the direction of the central axis and Is urged in a direction of narrowing the interval, the adjusting means enables increase and decrease of the urging force of the urging means, the roller is attached to either one of the inner ring or the outer ring, and the other is rotated. A roller device for a slide, which is constrained and supported so as to be movable in the central axis direction.