JPH062027Y2 - Guide rail for linear guide device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a guide rail for a linear guide device in which a slider travels in an axial direction freely by rolling of a ball,
Particularly, it relates to improvement of the dustproof structure of the guide rail.

[Conventional technology]

In the linear guide device, a slider is linearly movable on a guide rail extending in the axial direction via a large number of balls that can roll. The guide rail is fixed to the base by tightening mounting bolts inserted through a plurality of bolt holes provided through the body. On the other hand, a driven body such as a table is attached to the slider so as to move along the guide rail.

In this conventional linear guide device, if dust, dust, chips, etc. are accumulated on the upper surface of the guide rail and enter the passage of the rolling ball, the smooth rolling of the ball is hindered, and the smooth movement of the slider is prevented. Disturbed. That is,
The improvement of the guide rail dustproof seal performance in the linear guide device is an important requirement in terms of the characteristics of the linear guide device. Therefore, dustproof wiper seals are attached to both ends of the slider.

By the way, when mounting the guide rail to the base, the mounting bolts are generally inserted and tightened into the bolt insertion holes that are open on the upper surface of the guide rail.Therefore, the upper surface of the bolt head should be slightly depressed into the bolt insertion hole. It has become. As a result, the location of the bolt insertion hole on the upper surface of the guide rail becomes a depression. Then, the dust and the like collected in the recesses pass through the dustproof wiper seal and enter the inside of the slider, and the sealing function of the wiper seal is impaired. Therefore, plugging is performed in the depression of the bolt insertion hole.

However, there is a problem in that the plugging so as to completely eliminate the step between the bolt insertion hole and the surroundings increases the cost and increases the cost. Steps occur. Therefore, there is a problem that the wiper seal is caught on this step, the seal is damaged, and the sliding resistance of the slider fluctuates. It is conceivable that the opening edge of the bolt insertion hole or the outer edge of the embedding head is chamfered in advance so that it is less likely to be caught, but dust is still accumulated in the recess formed by the chamfer.

Therefore, as a countermeasure, a thin steel plate was placed on the upper surface of the guide rail over the entire length of the guide rail, or a flat dustproof plate made of synthetic resin was placed on the upper surface of the guide rail to prevent the effects of depressions from the bolt insertion holes. (Actual development Sho 59-
No. 116401), the applicant has previously proposed.

[Problems to be solved by the invention]

However, in such a conventional guide rail for a linear guide device, it is difficult to closely attach the dustproof plate over the entire length of the long guide rail, and in the dustproof plate made of thin steel plate, wavy due to bending of the plate, etc. There is a problem in that the slider that moves on the guide rail moves up and down via the wiper seal that slides on it and the accuracy is not obtained. Also,
In the case of the synthetic resin dustproof plate, there is a problem that the manufacturing cost is increased because it is formed by using a mold.

Therefore, the present invention provides a guide rail for a linear guide device having a dust-proof structure that can be in close contact with the entire length of the upper surface of the guide rail to ensure highly accurate operation of the slider, and can be attached very easily at low cost. Thus, the object is to solve the above-mentioned conventional problems.

[Means for solving problems]

The present invention that achieves the above object has an axial direction that supports a slider that has a bolt insertion hole for fixing to a base and is axially movably fitted through a large number of rollable balls. In the guide rail for the linear guide device extended to, a tape with an adhesive that is affixed to the upper surface of the guide rail and covers the opening of the bolt insertion hole, and both ends in the length direction of the tape fixed to the guide rail. It is provided with a dustproof device having a tape retainer to be pressed.

[Action]

The adhesive tape can be adhered to the upper surface of the guide rail only by cutting it to a predetermined size, peeling off the protective paper, and sticking it on the guide rail. Since both end portions in the length direction of the tape are fixed by applying a tape retainer from above so as not to be peeled off, the tape is not peeled off or displaced, and the bolt insertion hole is completely shielded to prevent dust. The tape holder can be made by simple sheet metal processing and is low cost.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

1 to 3 show an embodiment of the present invention, in which a linear guide device is formed by movably mounting a slider 2 on a guide rail 1 extending in the axial direction. A wide and shallow recess 1A is formed on the upper surface of the guide rail 1 over the entire length thereof. The through holes 5 of the bolts 4 for mounting the guide rail 1 on the base 3 are formed as through holes that are pulled out from the surface of the recess 1A to the bottom surface of the guide rail 1 at a predetermined pitch in the rail longitudinal direction. The bolt 4 is screwed into the screw hole formed in the base 3 through the bolt insertion hole 5.

A ball rolling groove 11 is formed on both outer surfaces of the guide rail 1 in the axial direction, and a slider body 2A of the slider 2 is formed.
A ball rolling groove 13 facing the ball rolling groove 11 is formed on the inner surface of each of the sleeve portions 12. And
A large number of balls 14 are rotatably mounted between the ball rolling grooves 11 and 13 facing each other, and the slider 2 moves axially on the guide rail 1 through the rolling of the balls 14. It is supposed to do. With this movement, the ball 14 interposed between the guide rail 1 and the slider 2 rolls and moves to the end portion of the slider body 2A of the slider 2, so that the slider 2 is continuously moved in the axial direction. Need to circulate these balls 14. Therefore, a ball return hole 15 penetrating in the axial direction is further formed in the sleeve portion 12 of the slider body 2A, and end caps 16 are provided at both front and rear ends of the slider body 2A.
A ball circulation path is formed by forming a U-shaped connection path (not shown) communicating with the ball return hole 15 therein.

After fixing the guide rail 1 to the base 3 with the bolts 4 that have passed through the bolt insertion holes 5, the upper surface 4A of the bolts and the recess 1 of the guide rail 1
A plug 6 is attached to the head of the bolt 4 in order to fill the step with the surface of A.
Put on.

A dustproof device 20 is mounted on the upper surface of the guide rail 1. The dustproof device 20 includes a tape with an adhesive, which is placed over the entire length of the guide rail 1, for example, a metal tape 21 with a single-sided adhesive (hereinafter, simply referred to as a metal tape) in this embodiment, and a length of the metal tape 21. Tape retainer 22 that holds both ends in the vertical direction and secures to the guide rail 1
And a fixing screw 23 which is inserted into the tape retainer 22 and the metal tape 21 and screwed into the guide rail 1.

The metal tape 21 is formed by applying an adhesive to one surface of a strip-shaped metal plate such as a thin steel belt, and covering the adhesive surface with a non-adhesive protective tape that can be easily peeled off. The rail 1 is formed to have a width matching the width of the recessed strip 1A on the upper surface. Further, as the length of the tape, a tape wound in a roll shape or cut into a predetermined length can be used. In this example,
The length of the tape is such that both ends of the tape can be folded into the end face of the guide rail and further folded into the bottom face of the guide rail.

The tape retainer 22 is made of a metal plate and has a width substantially the same as the width of the metal tape 21. Has been done. A notch 1B is formed at the lower end of the guide rail 1 so that the tape retainer 22 fitted to the end of the rail does not protrude from the lower surface of the rail. An insertion hole 23A for the fixing screw 23 is formed on the rail end surface covering surface of the tape retainer 22.

A wiper seal W is attached to the end surface of the end cap 16 with a screw 26, and a grease nipple 27 is attached to the side surface of the end cap 16. Also,
Reference numeral 28 is a screw hole of a tightening bolt for mounting, for example, a table on the slider body 2A.

In the dustproof device 20 having the above structure, the guide rail 1 is fixed to the base 3 with the bolts 4 which are passed through the insertion holes 5, and the plugs 6 are attached to the heads of the bolts 4 and then attached to the guide rails 1. To be The procedure is as follows.

First, the adhesive protective tape of the metal tape 21 is peeled off and attached onto the recess 1A on the upper surface of the guide rail 1 under tension. Since the metal tape 21 is longer than the entire length of the guide rail 1, both end portions of the metal tape 21 are bent toward the end surface side of the guide rail 1 and further bent and attached to the cutout portion 1B side of the lower surface of the guide rail 1. Next, the tape retainer 22 is fitted on the end surface of the guide rail 1, and the fixing screw insertion hole 23A and the metal tape 21 are attached.
The fixing screw 23 is inserted into and and is screwed into the screw hole 24 on the end face of the guide rail 1. In this manner, the ends of the metal tape 21 are pressed by the tape retainers 22 to prevent the both ends of the metal tape 21 from peeling off.

When the slider 2 moves on the guide rail 1 to which the dustproof device 20 is attached, as the slider 2 advances, the wiper seal W
The lip portion wipes off the dustproofs adhering to the ball rolling groove 11 of the guide rail 1 and the surface of the metal tape 21 mounted on the groove 1A. At this time, since the insertion holes 5 of the plurality of bolts 4 fixing the guide rail 1 to the base 3 are all covered with the metal tape 21, the slider 2 can be operated very smoothly. Moreover, the metal tape 21 is affixed to the guide rail 1 with an adhesive while applying tension over the entire length of the guide rail 1, and the both ends of the metal tape 21 are firmly fixed to the guide rail 1 by the tape retainer 22 and the fixing screw 23. Therefore, there is no fear of waviness.

FIG. 4 shows another embodiment of the tape retainer in the dustproof device 20.

The tape retainer 32 of this embodiment differs from the above embodiment in that only one end side is bent at a right angle to form an L shape.

In the case of this L-shaped tape retainer 32, the end of the metal tape 21 is bent only once and affixed to the end surface of the guide rail 1, and the L-shaped tape retainer 32 is used to press the end of the metal tape 21, and the tape length is short. Moreover, the processing of the tape retainer is easy,
That has the advantage of lower prices.

In each of the above-described embodiments, the metal tape made of metal is used as the material of the adhesive tape 21 of the dustproof device 20, but the material is not limited to this, and may be made of synthetic resin, for example.

Alternatively, the tape length may be the same as the entire length of the guide rail 1, and the tape end face may be pressed by the tape retainer 22 without being folded into the end face of the guide rail 1.

Moreover, the upper surface of the guide rail 1 can be applied to a flat surface having no recess 6.

In any case, it is not necessary to manufacture it by using a dedicated mold as in the case of the conventional dustproof device using the guide rail upper surface seal plate, so it is extremely inexpensive and easy to obtain, and the mounting workability is also high. Very good.

[Effect of device]

As described above, according to the present invention, the dustproof device for closing the recess formed on the upper surface of the guide rail with the bolt insertion hole for mounting the guide rail is attached with the adhesive tape over the entire length of the guide rail. Both ends of the adhesive-attached tape were fixed by tape pressers and attached. As a result, the workability of attaching the dustproof device becomes extremely good, and the production is easy and the cost can be provided at a very low cost. Moreover, the wiper seal slides extremely smoothly because it is attached in close contact with the entire length of the guide rail surface, so that the wiper seal slides very smoothly, and thus the slider can operate on the guide rail with high accuracy. Since there is no possibility of catching and damaging the seal, it is possible to obtain the effect of significantly improving the seal life as well as the seal effect.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is a partially cutaway front view of the one shown in FIG. 1, and FIG. 3 is III of FIG.
-III sectional view, FIG. 4 is a sectional view corresponding to FIG. 3 of another embodiment of the present invention. 1 is a guide rail, 2 is a slider, 3 is a base, 5 is a bolt insertion hole, 20 is a dustproof device, 21 is adhesive tape, 2
2 is a tape retainer, and 23 is a fixing screw.

Claims (1)

[Scope of utility model registration request] 1. A linearly extended shaft which has a bolt insertion hole for fixing it to a base and which supports a slider fitted so as to be movable in the axial direction through a large number of rollable balls. In the guide rail for the guide device, an adhesive tape attached to the upper surface of the guide rail and covering the opening of the bolt insertion hole, and a tape retainer fixed to the guide rail and holding both ends in the length direction of the tape. A guide rail for a linear guide device, which is equipped with a dustproof device.