JPH0235049Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a guide device for a plate-shaped rail, and particularly to a dust-proof type guide device for a plate-shaped rail.

[Conventional technology]

A combination structure of a plate-shaped rail and its guide means, in which either one is fixed and the other is attached to a movable member, has been widely used in various measuring instruments.

FIG. 7 shows a road surface measurement device that measures road surface irregularities using laser light. This device consists of a moving frame 5 that reciprocates in directions A and B along a road surface E.
0 is equipped with a laser beam transmitting/receiving section 51, and in order to further expand the measurement range, the laser beam transmitting/receiving section 51
A configuration is adopted in which the movement frame 50 is moved back and forth on the moving frame 50.

In this case, the moving frame 50 is equipped with a plate-shaped rail 52. And this plate-shaped rail 5
A plurality of sets (5 sets in FIG. 7) of guide rollers S ₁ , S ₂ ,
S ₃ , ..., S ₅ are arranged on the main body frame 53 along the measurement surface of the road surface E. Further, in FIG. 7, 54 indicates a drive chain, and 55 indicates a driven chain. Also, 56 is a moving frame 50
Shows the guide rail mounted on top. The laser beam transmitting/receiving section 51 is guided by this guide laser beam 56 and can reciprocate in the directions of arrows C and D. 57 and 58 indicate brake means;
9 and 60 indicate position sensors. Furthermore, 61, 62
indicates a stopper for the laser beam transmitting/receiving section 51.

[Problem that the invention attempts to solve]

Since the above conventional example continues work on the dusty road surface E, the above-mentioned rails 52, 56
And dust adheres to the rollers, causing problems such as particularly hindering smooth movement of the moving frame 52. Therefore, if you leave this as is,
Even if it is possible to detect large undulations on the road surface E through signal processing of the received signal, it becomes difficult to distinguish detailed irregularities on the road surface E from noise.
A situation arises in which the significance of precision measurement using laser light or the like is lost.

[Purpose of invention]

In view of the disadvantages of the conventional example, the present invention has been developed to provide a dust-proof plate-like structure that effectively eliminates dust that enters through the plate-like rail passage notch of the dust cover and effectively guides the movement of the plate-like rail. The object is to provide a guide device for a rail.

[Means for solving problems]

Therefore, in the present invention, a plurality of sets of support rollers are arranged corresponding to both edges in the width direction of a plate-shaped rail that moves back and forth, and each set of guide rollers located at least below the support rollers is A dust cover with a notch for running on the rail is fitted on the
A rotary cover is provided on the outside of the dust cover that covers the notch of the dust cover and is rotated by being urged by the traveling plate-like rail, and this rotary cover is also provided with means for returning to its original position. The purpose of the present invention is to achieve the above object by adopting a configuration.

[Example of idea]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 6. Here, the same reference numerals are used for the same constituent members as in the case of FIG. 7 described above.

Among the figures showing this embodiment, FIG. 1 shows a plan view. Moreover, FIG. 2 shows a front view (elevation view) seen from the lower side of FIG. 1.

This embodiment differs from the conventional example in the structure of S ₁ , S ₂ , S ₃ , ..., S ₅ of the support roller portion in FIG. is the same as

As shown in FIGS. 1 and 2, the support roller portion in this embodiment includes a support roller 1, a support shaft 2 and a main body frame 53 that prevent the support roller 1 from rotating freely, and a cutter for running on the rail. Notch 3
A, and a dust cover 3 that fits the entire support roller 1, and a rotary cover 4 that covers the notch 3A of the dust cover 3 and rotates by being urged by a running plate rail 52. It is equipped with

The plate-shaped rail 52 is fixed to the moving frame 50 (see FIG. 7) as in the case of FIG.
It is designed to move back and forth along the measurement road surface E while being guided by the road surface E. This plate-shaped rail 52
As shown in the figure, both ends thereof form chevron-shaped portions 52A and 52B formed at acute angles.

The dust cover 3 is screwed to the main body frame 53 by cover mounting members 3A and 3B, as shown in FIGS. 1 to 4. The notch 3A portion of the dust cover 3 is equipped with plate-shaped rail members 14A and 14B along the notch 3A. These plate-shaped rail members 14A, 14
B comes into contact with the plate-like rail 52 while it is running to prevent dust from adhering to the support roller 1 during the running state.

Among the side surfaces of the dust cover 3, the support roller 1
A through hole 3C (see Fig. 4) for a mounting nut is provided in the portion facing the rotating surface of the through hole 3C.
A rubber seal plate 3D for dustproofing is attached to the part.

A rail dust removal member 1 made of an elastic member is provided on both end surfaces of the surface perpendicular to the moving direction of the dust cover 3.
0 is attached.

As shown in FIG. 4, this rail dust removal member 10 has a dust removal groove 10A for the plate-shaped rail 52 at one end.
A notch 10B is provided at the other end to fit around the detent pin 11, and a mounting hole 10C is formed in the center as shown in FIG.

In this rail dust removal member 10, the dust removal groove 10A portion corresponds to the chevron portion 52 of the plate-shaped guide rail 52 described above.
A and 52B are always in contact with each other. To explain this in more detail, the plate-shaped rail 52
When viewed from the rail dust removing member 10, during its movement, it slightly undulates in the direction of arrow K in FIG. 4, causing a positional shift. In this case, the rail dust removal member 10 is separated from the plate-shaped rail 52 due to this positional shift, and dust removal is no longer possible. For this reason, in this embodiment, the rail dust removal member 10 is formed of an elastic material, and is attached to both ends of the dust cover 3 described above so as to be pressed somewhat against the plate-shaped rail 52 side. I'm starting to do that. Specifically, the rail dust removal member 10 is mounted as shown in FIG. Further, the detent pin 11 also functions to return the rail dust removal member 10 to its original position. Therefore, even if a relative positional shift occurs between the main body frame 53 and the plate-shaped rail 52, the rail dust removal member 10 always comes into contact with the chevron-shaped portion 52A of the plate-shaped guide rail 52.
Therefore, the chevron portion 52 of the plate-shaped guide rail 52
A is always cleaned of dust, so moving frame 5
Even if a change occurs in the zero stroke, the plate-shaped rail 52 can be reciprocated extremely smoothly by the action of the rail dust removal member 10. As the material of this rail dust removing member 10, urethane foam, silicone rubber, or equivalent materials may be used.

Here, at the mounting part of the rail dust removal member 10,
As shown in FIG. 6, an elastic member 10D may be interposed, and the rail dust removal member 10 and other parts may be formed of a rigid member. In this case, the portion 10A (see FIG. 4) of the rail dust removal member 10 that sandwiches the plate-shaped guide rail 52 may be configured to have elasticity.

The rotating cover 4 has a fulcrum 2 as shown in FIG.
It is configured to be able to rotate reciprocatingly as indicated by arrows G and H around 0. To explain this in more detail, as shown in FIG. 1, the rotary cover 4 has a notch fitting portion 4A into which the notch portion 3A of the dust cover 3 described above is fitted, and a notch fitting portion 4A that is returned to its original position by its own weight. It is provided with a return action section 4B that causes the return to return, and guide pieces 4E and 4F that are biased by the running force of the plate-shaped rail 52 and rotate the entire body in the direction of arrow G in FIG.

When the plate-shaped rail 52 arrives together with the movable frame 50, the rotating cover 4 rotates in the direction of arrow G as the guide piece 4E portion is pressed by the plate-shaped rail 52. Then, when the plate-shaped guide rail 52 passes or leaves in the opposite direction, the return action portion 4B immediately acts to return the entire rotating cover 4 to its original position. In this case, the mounting screw portion of the rail dust removing member 10 also functions as a stopper for preventing excessive rotation of the rotating cover 4.

In addition, this rotary cover 4 is configured such that in its original position, the notch fitting portion 4A covers the notch portion 3A of the dust cover 3 (note that the notch fitting portion 4A shown in FIG. In the figure, the central part of the part 4A is omitted so that the members below it can be seen.) Therefore, even when the plate-shaped frame 52 does not arrive, the notch 3A of the dust cover 3 is covered, so that external dust does not reach the dust cover 3.
Therefore, there is an advantage that the adhesion of dust to the support roller 1 is significantly reduced.

Other configurations and effects are completely the same as in the case of FIG. 7 described above.

In addition, in the above embodiment, the dust cover 3
Although the rotating cover 4 is configured to cover only the plate-shaped rail notch 3A, the present invention is not necessarily limited to this, and may be configured to cover the entire dust cover 3. Further, as the means for returning to the original position, a tension spring may be used instead of the return action section 4B that uses its own weight.

Furthermore, in the above conventional example, the plate-shaped rail 52
Although the case where the surface of the plate rail 52 is vertically disposed is illustrated, the plate-like rail 52 may be disposed horizontally by appropriately changing the position of the return action portion 4B.

[Effect of idea]

Since the present invention is configured and functions as described above,
According to this, the action of the dust cover can effectively prevent dust from adhering to the entire support roller, and in particular, the action of the rotating cover makes it possible to effectively prevent dust from adhering to the entire support roller, even after the plate rail has passed or has not arrived. It is possible to effectively prevent dust from adhering to the support roller, and therefore, when used in various measuring devices, etc., it is dust resistant and can operate smoothly over a wide range over a long period of time, and with high precision. It is possible to provide an excellent guide device for a plate-shaped rail that is not available anywhere else.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway plan view showing an embodiment of the present invention, Fig. 2 is a front view of Fig. 1, and Fig. 3 is a cross section showing the plate-shaped guide rail used in Fig. 1. Figure 4 is a partially cutaway front view showing the state in which the rotating cover in Figure 1 is removed, Figure 5 is a partial sectional view taken along line V-V in Figure 4, and Figure 6 is FIG. 5 is a sectional view showing another embodiment, and FIG. 7 is an explanatory view showing a conventional example. 1...Support roller, 3...Dust cover, 3A
... Notch portion, 4... Rotating cover, 4B... Original position return means.

Claims (1)

[Claims for Utility Model Registration] A plurality of sets of support rollers are arranged corresponding to both edges in the width direction of a plate-shaped rail that moves back and forth, and each of the guide rollers located at least below among the support rollers is provided. Each set is fitted with a dust cover having a notch for running on the rail, and a rotating cover that covers the notch of this dust cover and rotates under the force of the plate-like rail running is attached to the dust cover. A guide device for a plate rail, which is equipped on the outside of the cover, and is characterized in that the rotating cover is also equipped with a means for returning to its original position.