JPH052558Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is a guide roller used to guide and move a member along a channel-shaped guide rail or guide groove (hereinafter simply referred to as a guide rail). Regarding the improvement of

Prior Art When moving a member along a guide rail, it is convenient to use a guide roller that engages with the guide rail and rolls within the guide rail, and such technology is a universal technique widely used in almost every field. It's technology.

Conventional guide rollers used for this purpose are
A roller is rotatably fitted to the shaft end of the main shaft, and the peripheral side of the roller always rolls while contacting at least one side wall of the guide rail.
This restricts the traveling direction of the member to which the guide roller is fixed in the longitudinal direction of the guide rail. In other words, the distance between the axis of the main shaft and the side wall of the guide rail is always 1/2 of the outer diameter of the roller.
Therefore, the traveling direction of the member fixing the main shaft can be accurately regulated in the longitudinal direction of the guide rail.

On the other hand, although such guide rollers can maintain a constant distance between the position of the axis of the main shaft and the peripheral wall of the guide rail, there is no positional restriction in the axial direction of the main shaft, so as the member advances. Otherwise, meandering of the parts may occur. Therefore, a guide roller has been proposed in which a main roller and an auxiliary roller that rotates in a direction perpendicular to the main roller are assembled together (Japanese Unexamined Patent Publication No. 113698/1983, Japanese Utility Model Publication No. 31572/1983). . The main purpose of these guide rollers is to be incorporated into forks such as forklifts and reach lifts. It is firmly fixed through suitable fixing means.

Problems to be Solved by the Invention In this prior art, the shaft supporting the auxiliary roller is firmly fixed to the sleeve supporting the main roller through fixing means including a dowel pin. The problem is that the shape is large, and although it may be suitable for use in forks such as forklifts, it is difficult to use it for general purposes in other small equipment. Furthermore, when fixing the guide roller to a member, it is difficult to recognize the rotating direction of the auxiliary roller from the outside, so there is a problem that the installation work is troublesome.

Therefore, in view of the problems of the prior art, the purpose of this invention is to attach a main roller and an auxiliary roller perpendicular to each other to the main shaft, and to position a small shaft supporting the auxiliary roller by the main roller. By forming a parallel surface on the main shaft that indicates the direction of rotation of the auxiliary roller, we have provided a new guide roller that can be significantly downsized as a whole and is also extremely easy to install. It's about doing.

Means for Solving the Problems The structure of this invention to achieve the above object includes a main shaft having an axial groove formed at the end of the shaft, a main roller rotatably fitted to the end of the shaft, It is rotatably mounted in the groove via a small shaft and consists of an auxiliary roller with a diameter smaller than the inner diameter of the main roller. The gist is that a part of the auxiliary roller protrudes and is rotatable in a direction perpendicular to the main roller, while a parallel surface indicating the rolling direction of the auxiliary roller is formed on the main shaft.

Effect When using the configuration of this invention, the main roller and the auxiliary roller can be engaged with the guide rail so as to come into contact with either the side wall or the bottom wall of the guide rail, respectively. Since the position of the main shaft in two directions, radial and axial, can be controlled at the same time, linear movement without meandering can be guaranteed for the member.

Example Examples will be described below with reference to the drawings.

The guide roller GR has a main shaft 10 and a main roller 2.
1 and an auxiliary roller 22 (FIG. 1).

The main shaft 10 is a block body formed by forming in this order a shaft end portion 11 having an axial groove portion 11a, an intermediate portion 12 having parallel surfaces 12a, 12a sandwiching the shaft center, and a mounting screw portion 13. In the shaft end 11, a snap spring groove 11c is provided on the outer peripheral surface near the shaft end 11b, and small holes 11d, 11d perpendicular to the groove 11a are bored through the shaft end 11 (FIG. 2). .

An auxiliary roller 22 is rotatably mounted in the groove 11a via a small shaft 14 inserted through the small holes 11d. However, here, the small axis 14
is formed short so that both ends thereof do not protrude from the outer periphery of the shaft end portion 11, and the auxiliary roller 22
is smaller in diameter than the outer diameter of the shaft end 11, and
It is assumed that the positions of the small holes 11d and 11d are determined so that a portion of the circumferential side thereof protrudes from the shaft end 11b (FIG. 1).

The main roller 21 is rotatably fitted to the outer periphery of the shaft end 11 on which the auxiliary roller 22 is attached via a bearing 21a. It is positioned by a snap spring 23.
Note that the small shaft 14 on which the auxiliary roller 22 is mounted is positioned by the inner ring of the main roller 21.

A mounting nut 26 is screwed into the mounting screw portion 13 via a flat washer 24 and a spring washer 25.

The guide roller GR having such a configuration is used in combination with a channel-shaped guide rail C (FIG. 3).

First, install the guide roller GR mounting thread 13, flat washer 24, spring washer 25, and nut 26.
Screw the guide roller GR onto a member (not shown) using the screws. At this time, the rolling direction of the auxiliary roller 22 is made to match the required traveling direction of the member, that is, the longitudinal direction of the guide rail C, and the main roller 21 is made to coincide with the side wall C of the guide rail C.
1 and C1, and the auxiliary roller 22 is always in contact with the bottom wall C2, since the rolling directions of the main roller 21 and the auxiliary roller 22 are perpendicular to each other, The position of the member can be regulated in two directions, the radial direction and the axial direction of the main shaft 10 of the guide roller GR, and the member can be accurately moved along the longitudinal direction of the guide rail C.

Note that the auxiliary roller 22 is housed in the groove 11a of the main shaft 10, perpendicular to the main roller 21,
Moreover, since its diameter is smaller than the outer diameter of the shaft end 11, that is, the inner diameter of the main roller 21, the main roller 21 and the auxiliary roller 22 can independently rotate in orthogonal directions without interfering with each other. The member can move smoothly along the guide rail C.

In the above description, the parallel surfaces 12a, 12a formed in the intermediate portion 12 of the main shaft 10 are the guide rollers.
Provides an engagement surface for a wrench when attaching the GR to a member. Therefore, if the parallel surfaces 12a, 12a are formed in the same direction as the rolling direction of the auxiliary roller 22, the rolling direction of the auxiliary roller 22 can be confirmed by the direction of the parallel surfaces 12a, 12a. Therefore, the direction in which the guide roller GR is attached to the member can be easily determined.

In addition, here, the main roller 21 is a bearing 2
1a, and the auxiliary roller 22 is shown as one that slides and rotates on the small shaft 14, but the former may be changed to one with a sliding metal, or the latter may be equipped with a bearing. Needless to say, it may be changed. Furthermore, either or both of the main roller 21 and the auxiliary roller 22 may be rollers with tires made of a cushioning material such as nylon or rubber.

Effects of the invention As explained above, according to this invention, the auxiliary roller is rotatably attached to the groove provided at the end of the main shaft via the small shaft, and the main roller is rotated around the end of the shaft. The auxiliary roller is fitted so that it can move freely, and a part of the circumferential side of the auxiliary roller protrudes from the shaft end of the main shaft, and is rotatable in a direction perpendicular to the main roller. and position the main shaft.
By forming parallel surfaces that indicate the rolling direction of the auxiliary roller, the main roller and the auxiliary roller can simultaneously regulate the position of the member in two directions: the radial direction and the axial direction of the main shaft. possible, therefore,
Meandering can be effectively prevented when the member advances, and the small shaft is positioned by the main roller without using any special fixing means, so the overall structure is simple and the overall structure is simple. It is possible to significantly reduce the size of the roller, and furthermore, since the rolling direction of the auxiliary roller can be confirmed from the outside due to the parallel plane of the main shaft, there is an excellent effect that the installation work is extremely simple.

[Brief explanation of the drawing]

1 to 3 show an embodiment; FIG. 1 is an overall exploded perspective view, FIG. 2 is an exploded perspective view of a main part of FIG. 1, and FIG. 3 is an explanatory view of the state of use. GR...Guide roller, 10...Main shaft, 11...
...Shaft end, 11a...Groove, 11b...Shaft end, 1
2a...Parallel surface, 14...Small shaft, 21...Main roller, 22...Auxiliary roller.

Claims (1)

[Scope of utility model registration request] A main shaft having an axial groove formed at the shaft end, a main roller rotatably fitted to the shaft end, and a main roller rotatably fitted to the groove through a small shaft, the inner diameter of the main roller being rotatably fitted to the shaft end. and an auxiliary roller with a smaller diameter, the small shaft is positioned by the main roller, and the auxiliary roller protrudes a part of the circumferential side from the shaft end of the main shaft, and extends in a direction perpendicular to the main roller. A guide roller that is rotatable and has a parallel surface formed on the main shaft to indicate a rolling direction of the auxiliary roller.