JP4442055B2 - Linear guide device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a linear guide device in which a dust-proof belt is attached to the upper surface of a guide rail.
[0002]
[Prior art]
In the linear guide device, a slider is supported on a guide rail extending in the axial direction so as to be linearly movable through a large number of rolling elements that can freely roll. The guide rail has a plurality of mounting holes penetrating from the upper surface to the lower surface in the axial direction at substantially equal intervals. By tightening the bolts inserted through the mounting holes to the base, the guide rail can be Fixed to etc. On the other hand, a driven body such as a table is attached to the slider and moves along the guide rail.
[0003]
In this conventional linear guide device, dust, dust, chips, etc. accumulate on the upper surface of the guide rail, and when this enters the slider, smooth rolling of the rolling elements is hindered, and consequently smooth movement of the slider is hindered. That is, improvement of the guide rail dust-proof seal performance in the linear guide device is an important requirement in terms of the characteristics of the linear guide device. Therefore, dust-proof wiper seals are attached to both ends in the axial direction of the slider.
[0004]
By the way, when the guide rail is fixed to the base, as described above, the bolt is inserted into the mounting hole opened on the upper surface of the guide rail and tightened. When the guide rail is fixed to the base, the mounting hole on the upper surface of the guide rail is recessed. Then, dust or the like accumulated in the depressions penetrates the dustproof wiper seal and enters the inside of the slider, and the sealing function of the wiper seal is impaired. Therefore, embedding is performed in the recess of the mounting hole.
[0005]
However, there is a problem that embedding the recess in the mounting hole so as to completely eliminate the level difference from the mounting hole and surroundings increases the man-hours and increases the cost. There is a slight difference in the opening edge of the hole. 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.
[0006]
Therefore, in order to solve such a problem, in Japanese Utility Model Publication No. 6-2027, a strip-shaped body such as a metal tape is attached to the upper surface of the guide rail with an adhesive to open the upper opening of the mounting hole. A cover is disclosed that is not adversely affected by the recess in the mounting hole.
[0007]
[Problems to be solved by the invention]
However, the conventional linear guide device is effective when used in a dry environment, but when used in an environment where a water-soluble substance such as coolant cutting fluid is used, the strip and the guide rail upper surface There is a risk that the aqueous solution will permeate into the pressure-sensitive adhesive interposed between the two and the pressure-sensitive adhesive will decrease, and the belt-like body may peel off from the upper surface of the guide rail.
[0008]
The present invention has been made to eliminate such inconveniences, and even when used in an environment where a water-soluble substance is used, it is possible to obtain excellent dust-proof sealing performance without peeling off the strip. An object is to provide a linear guide device.
[0009]
[Means for Solving the Problems]
In order to achieve such an object, the invention according to claim 1 is directed to a guide rail that is formed with a mounting hole penetrating from the upper surface to the lower surface and extended in the axial direction, and an adhesive is provided on the upper surface of the guide rail. A linear guide provided with a belt-like body that is attached and covers the upper opening of the mounting hole, and a slider that is supported by the guide rail so as to be relatively movable along the axial direction through the rolling of a large number of rolling elements. In the device
The contact point of the guide rail on both sides in the width direction of the strip is coated with a water-resistant material along the axial direction.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an explanatory perspective view for explaining a linear guide device which is an example of an embodiment of the present invention. FIG. 2 is a diagram in which a part of the linear guide device is viewed from one end side in the axial direction of FIG. 3 is a back view of the metal tape as a band-like body, FIG. 4 is a cross-sectional view taken along line III-III in FIG. 1, FIG. 5 is an explanatory cross-sectional view for explaining a modification of the peeling preventing member, and FIG. 7 is an explanatory perspective view for explaining another embodiment, and FIG. 7 is an explanatory sectional view for explaining another embodiment of the pressure-sensitive adhesive structure.
[0013]
1 to 5, in this linear guide device, a slider 2 is straddled so as to be movable on a guide rail 1 extending in the axial direction, and the upper surface of the guide rail 1 is wide over its entire length. A shallow groove 1A is formed.
A plurality of mounting holes 5 penetrating from the upper surface to the lower surface are provided in the concave strip 1A at substantially equal intervals in the axial direction, and screw holes provided in the base 3 with bolts 4 inserted through the mounting holes 5 are provided. The guide rail 1 is fixed to the base 3 by being screwed onto and tightened.
[0014]
Roller element rolling grooves 11 are formed in the axial direction on both outer surfaces of the guide rail 1, and the slider body 2 </ b> A of the slider 2 is opposed to the rolling element rolling grooves 11 on the inner surfaces of both sleeve portions 12. A rolling element rolling groove 13 is formed.
A large number of balls 14 as rolling elements are slidably loaded between the rolling grooves 11 and 13 facing each other, and the slider 2 is guided to the guide rail through the rolling of the balls 14. 1 is moved along the axial direction. With this movement, the ball 14 interposed between the guide rail 1 and the slider 2 rolls and moves to the end of the slider body 2A. Therefore, in order to move the slider 2 continuously in the axial direction, The ball 14 needs to be circulated.
[0015]
Therefore, a rolling element return hole 15 penetrating further in the axial direction is 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 rolling element circulation path is formed by forming a U-shaped connection path (not shown) that communicates.
After the guide rail 1 is fixed to the base 3 with bolts 4 passed through the mounting holes 5, a plug is embedded in the upper part of the mounting holes 5 in order to fill the step between the bolt upper surface 4A and the concave surface 1A of the guide rail. Wear 6
[0016]
A dustproof device 20 is mounted on the upper surface of the guide rail 1. The dustproof device 20 includes a strip with an adhesive 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 the metal tape. And a peeling preventing member 22 for preventing peeling at both ends in the length direction of the guide 21. The peeling preventing member 22 presses the end of the metal tape 21 and the end of the guide rail 1 in the axial direction together with the metal tape 21. It is fixed to the part via a fixing screw 23.
[0017]
The metal tape 21 is formed by, for example, applying a pressure-sensitive adhesive on one surface of a thin belt-shaped stainless steel plate or the like, and covering the pressure-sensitive adhesive surface with a non-adhesive protective tape that can be easily peeled off. It is formed in the width | variety match | combined with the width | variety of 1 A of concave strips of the upper surface.
In this embodiment, the length of the metal tape 21 is such that both ends of the tape are folded into the end surface of the guide rail 1 and further folded into the lower surface of the guide rail 1.
[0018]
Here, in this embodiment, as shown in FIG. 3, an acrylic pressure-sensitive adhesive (main pressure-sensitive adhesive) 50 having excellent adhesiveness is applied over the entire length in the longitudinal direction at the center in the width direction on one side of the metal tape 21. At the same time, a silicon-based adhesive (foreign adhesive) 51 having excellent water resistance is applied to both sides in the width direction of one side of the metal tape 21 over the entire length in the longitudinal direction.
[0019]
The peeling prevention member 22 is made of a metal plate, and is approximately the same width as the metal tape 21. In this embodiment, as shown in FIG. 4, the peeling prevention member 22 is hooked on the upper and lower surfaces of the guide rail 1 to cover the end surface of the guide rail. Thus, the whole is formed in a U-shape. A notch 1B is formed at the lower end of the guide rail 1 so that the peeling prevention member 22 fitted to the rail end does not protrude from the lower surface of the rail. An insertion hole 23 </ b> A for the fixing screw 23 is formed in the rail end surface covering surface of the peeling preventing member 22.
[0020]
A wiper seal W is attached to the end face of the end cap 16 with a screw 26, and a grease nipple 27 is attached to the side face of the end cap 16. Reference numeral 28 denotes a screw hole of a tightening bolt for attaching, for example, a table to the slider body 2A.
The metal tape 21 having the above-described configuration is attached to the guide rail 1 by fixing the guide rail 1 to the base 3 with the bolt 4 passing through the mounting hole 5 and mounting the plug 6 on the upper portion of the mounting hole 5. Then follow the steps below.
[0021]
First, the protective tape covered with the adhesives 50 and 51 of the metal tape 21 is peeled off, and then the metal tape 21 is placed on the concave strip 1A on the upper surface of the guide rail 1 with tension applied to the metal tape 21. paste. Since the metal tape 21 is longer than the entire length of the guide rail 1, the protruding portions at both ends of the metal tape 21 are bent to the end surface side of the guide rail 1, and further bent to the notch portion 1 </ b> B side of the lower surface of the guide rail 1. .
[0022]
Next, the peeling prevention member 22 is fitted to the end surface of the guide rail 1, and the fixing screw 23 is inserted into the fixing screw insertion hole 23 </ b> A of the peeling prevention member 22 and the metal tape 21 to thread the screw hole 24 on the end surface of the guide rail 1. Screw in. In this manner, both ends of the metal tape 21 are prevented from being peeled by pressing the end portions of the metal tape 21 with the peeling preventing member 22.
[0023]
When the slider 2 moves on the guide rail 1 to which the metal tape 21 is attached, the lip portion of the wiper seal W is attached to the ball rolling groove 11 of the guide rail 1 or the concave strip 1A as the slider 2 advances. The dust adhering to the surface of the metal tape 21 is wiped off.
As is clear from the above description, in this embodiment, the acrylic adhesive 50 having excellent adhesiveness is disposed at the center in the width direction on one side of the metal tape 21, and the water resistance is excellent on both sides in the width direction. Since the silicon-based adhesive 51 is disposed, the aqueous solution is applied to the adhesive interposed between the metal tape 21 and the upper surface of the guide rail even when used in an environment where a water-soluble substance such as a coolant coolant is used. It can be prevented from penetrating, and as a result, it maintains the state that does not cause peeling as it is used in a dry environment without reducing the adhesiveness of the acrylic adhesive 50 as the main adhesive. And an excellent dustproof seal performance can be obtained.
[0024]
Further, since all of the plurality of mounting holes 5 opened on the upper surface of the guide rail 1 are covered with the metal tape 21, the operation of the slider 2 is performed very smoothly without being affected by the step, and the metal tape 21. Is attached with an adhesive in a state where tension is applied over the entire length of the guide rail 1, so there is no risk of undulation.
FIG. 5 shows a modification of the peeling preventing member.
[0025]
This peeling prevention member 32 is different 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 peeling prevention member 32, the end of the metal tape 21 is bent only once and attached to the end surface of the guide rail 1, and the top thereof is pressed by the L-shaped peeling prevention member 32, and the tape length is short. In addition, the processing of the peeling preventing member 32 is simple, and there is an advantage that the cost is reduced.
[0026]
In the above embodiment, the case where the material of the belt-like body is a metal metal tape is taken as an example. However, the present invention is not limited to this, and may be made of, for example, a synthetic resin.
Alternatively, the tape length may be the same as the entire length of the guide rail 1, and the tape end surface may be pressed by the separation preventing member 22 without being folded into the end surface of the guide rail 1.
The upper surface of the guide rail 1 can also be applied to a planar shape having no recess 6.
[0027]
FIG. 6 shows another embodiment of the belt-like body, and FIG. 7 shows another embodiment of the pressure-sensitive adhesive structure.
The belt-like body in FIG. 6 is a metal tape 60 in which an acrylic adhesive 61 as a main adhesive is applied to one surface of, for example, a thin belt-shaped stainless steel plate, as in the above embodiment. 61 is applied to the entire surface of one side of the metal tape 60 along the longitudinal direction.
[0028]
Then, in the same manner as described above, the metal tape 60 is applied to the upper surface of the guide rail 1 (here, the flat surface having no recess 6 on the upper surface) in a state where tension is applied to the metal tape 60, A contact 62 of the guide rail 1 on both sides in the width direction of the tape 60 is coated with a water-resistant material coating 62 (for example, silicon coating, fluororesin coating, etc.) along the axial direction. Thereby, the same effect as the said embodiment can be acquired.
[0029]
The pressure-sensitive adhesive structure of FIG. 7 is obtained by applying acrylic pressure-sensitive adhesive 71 or the like excellent in adhesiveness to the entire surface of both surfaces of a base material (for example, acrylic foam, film, paper, etc.) 70 having the same width as the metal tape. The adhesive 71 on one side is attached to the metal tape, and the adhesive 71 on the other side is attached to the upper surface of the guide rail 1.
In the linear guide device having such an adhesive structure between the metal tape and the upper surface of the guide rail, it is considered to reduce the vibration of the metal tape due to the contact with the wiper seal W when the slider moves on the metal tape. However, it was confirmed that the durability of the metal tape under dripping condition of the coolant aqueous solution was greatly improved as compared with the conventional linear guide device in which the metal tape was simply attached to the upper surface of the guide rail via an adhesive.
[0030]
【The invention's effect】
As is apparent from the above description, according to the present invention, even when used in an environment where a water-soluble substance is used, the effect of being able to obtain an excellent dustproof seal performance without peeling the band-like body. can get.
[Brief description of the drawings]
FIG. 1 is an explanatory perspective view for explaining a linear guide device as an example of an embodiment of the present invention.
FIG. 2 is a view in which a part is cut away in a view seen from one end side in the axial direction of FIG. 1;
FIG. 3 is a rear view of a metal tape that is a belt-like body.
4 is a cross-sectional view taken along line III-III in FIG.
FIG. 5 is an explanatory cross-sectional view for explaining a modified example of the peeling preventing member.
FIG. 6 is an explanatory perspective view for explaining another embodiment of the belt-like body.
FIG. 7 is an explanatory cross-sectional view for explaining another embodiment of the pressure-sensitive adhesive structure.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Guide rail 2 ... Slider 5 ... Mounting hole 14 ... Ball (rolling element)
21 ... Metal tape (band)
50 ... Acrylic adhesive (Main adhesive)
51 ... Silicon adhesive (different adhesive)
61 ... Acrylic adhesive 62 ... Water-resistant coating 70 ... Base material 71 ... Acrylic adhesive

Claims (1)

  A guide rail having an attachment hole penetrating from the upper surface to the lower surface and extending in the axial direction; and a belt-like body attached to the upper surface of the guide rail via an adhesive to cover the upper opening of the attachment hole; In a linear guide device comprising a slider supported by the guide rail so as to be relatively movable along the axial direction through rolling of a large number of rolling elements,
  A linear guide device characterized in that a coating of a water-resistant material is applied along the axial direction to the contact points of the guide rails on both sides in the width direction of the belt-like body.

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