JPH0432201Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is a linear guide rail used in machine tools, etc. to guide workpiece mounting tables and processing tools in various linear movements. The present invention relates to a protection device for a linear guide rail that can be suitably protected.

(Prior Art) As is well known, in machine tools that use this type of linear guide rail, chips, cutting water, and other harmful dust adhere to the linear guide rail during processing operations. In order to avoid such situations, it is necessary to protect the linear guide rail.

As such a protection means, for example, there is a device disclosed in Japanese Utility Model Application Laid-open No. 50-7289.

That is, this conventional device relates to a sliding surface protection device for protecting the sliding surface between the table and bed of a cutting machine, but as shown in FIG. , the other end is the winding drum 21
The protection cover 22 attached to the bed 23 is elastic and curved in an arc shape in the width direction. It is intended to protect the

(Problem to be solved by the invention) However, due to vibrations generated in the machine itself during operation of a machine tool, etc., or when winding up and unwinding the protective cover 22, a gap is created between the bed 23 and the protective cover 22. occurs, so bed 2
Conventional protection means in which the protective cover 22 is simply placed on the protective cover 3 has a fatal problem in that dust and the like cannot be avoided from entering through the gap.

In addition, the conventional type is for protecting the top surface of the flat bed 23, and therefore, by placing the protective cover 22 on the bed 23, a certain degree of protection can be achieved. This method has the disadvantage that it cannot be used as a means for covering objects that need to be covered and protected on the top and both sides.

Therefore, in order to solve the above-mentioned conventional problems, the present invention was devised to effectively protect three sides of the linear guide rail: both sides and either the upper or lower side. The object of the present invention is to improve the sealing performance without creating gaps where dust or the like can enter.

(Means for Solving the Problems) That is, in order to achieve the above-mentioned problems, the present invention provides a structure in which the tip of the protective cover 5 having resilient resilience is connected to the movable body 4 that moves along the linear guide rail 1. In a protection device for a linear guide rail in which the rear side of the protective cover 5 is elastically deformed into a planar or substantially planar shape against the elastic force of the protective cover 5 so as to be freely wound, the protective cover 5 includes: The protective cover 5 is formed into a substantially C-shaped cross section by its inward elastic force in order to cover the three sides of the linear guide rail 1, both sides and either the upper or lower side, and both ends of the protective cover 5 are
The protective cover 5 is pressed against both sides of the linear guide rail 1 by the elastic force of the protective cover 5, so that the three surfaces of the linear guide rail 1 are held in a substantially closed state. This is a protection device for guide rails.

(Function) Therefore, in the linear guide rail protection device characterized by the above configuration, the rear side of the protective cover 5 connected to the movable body 4 is sequentially wound up in accordance with the movement of the movable body 4, By feeding out, the dimensions of the protective cover 5 to be fed out are adjusted without any excess or deficiency.
The linear guide rail 1 can be protected by the protective cover 5 having a substantially C-shaped cross section. In this case, since an elastic restoring force acts on the protective cover 5 itself, which causes the protective cover 5 to return to a substantially C-shaped cross section, the protective cover 5
Both ends of the linear guide rail 1 are pressed against both sides of the linear guide rail 1 due to their elastic force.
It is possible to completely seal a total of three sides (both sides and one of the top and bottom sides) in a substantially closed state, and this seal is provided by the protective cover 5 which has elastic force and maintains a substantially C-shaped cross section. Therefore, it is possible to suitably prevent the generation of an unreasonable gap between the protective cover 5 and the linear guide rail 1 through which harmful dust or the like may enter.

Furthermore, since the protective cover 5 is held in pressure contact with both sides of the linear guide rail 1 as described above, even if the linear guide rail 1 is turned upside down, for example, the protective cover 5 It is also possible to prevent the linear guide rail 1 from becoming detached from the linear guide rail 1 and causing deflection.

(Example) An example of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, 1 indicates a linear guide rail having a predetermined cross-sectional shape for slidably guiding a moving body 4 having a workpiece mounting table 3 provided on the upper surface of a bearing case 2; A concave engagement groove 15 is provided at the lower end of both sides of the rail 1.
15 are provided in series. Reference numeral 5 denotes a protective cover for covering the linear guide rail 1, and the protective cover 5 is formed of a long member having a constant width and having a substantially C-shaped cross section that can be elastically restored. Further, as shown in FIG. 3A, the protective cover 5 has two notches 12 carved on the left and right sides in its tip 5a, and a portion of the protective cover 5 is bent vertically. It is connected to the movable body 4 by being held between the side wall of the movable body 4 and a bracket 14 separately attached to the side wall, as shown in FIG.

Reference numeral 6 denotes a winding shaft for winding up the rear side of the protective cover 5 in a flat state, and the winding shaft 6 is installed in a case 7 provided at one end of the linear guide rail 1. The protective cover 5 is supported by a shaft, and is always biased in the direction of rotation in which the protective cover 5 is wound up by the action of a separately provided spiral spring 8.

Reference numeral 9 denotes a guide body having a recess 10 at one end for positioning the winding shaft 6 and provided between the winding shaft 6 and one end of the linear guide rail 1; Reference numeral 9 is for guiding the protective cover 5 wound around the winding shaft 6 when the protective cover 5 is fed out toward the linear guide rail 1 side, and its upper surface is flat from the rear side to the tip side. It is formed into a shape that smoothly changes from a cylindrical state to a cylindrical state. Reference numeral 11 denotes a wiper member provided on the inner circumferential surface of the tip of the case 7 so as to be able to come into contact with the surface of the linear guide rail 1 fed out from the winding shaft 6.

This embodiment has the above-mentioned configuration, and the usage and operation thereof will be explained below.
When the moving body 4 is moved in the direction of arrow A along the linear guide rail 1 in the state shown in the figure,
The protective cover 5 wound around the winding shaft 6 is successively drawn out toward the linear guide rail 1 against the biasing force of the spiral spring 8.

Therefore, the protective cover 5 is attached to the linear guide rail 1.
When the protective cover 5 is extended to the side, the resilient restoring force of the protective cover 5 restores it to its initial C-shaped cross section, covering the upper surface of the linear guide rail 1. As shown in FIG. The rear side of the protective cover 5, which is drawn out along the smoothly changing shape of the body 9 and guided onto the linear guide rail 1, is also guided on the linear guide rail 1 in the same manner as the tip side.
When it is in a state of engagement with the engagement grooves 15, 15,
It moves along the linear guide rail 1. In addition, since the elastic restoring force of the protective cover 5 acts on the engagement between the ends 16, 16 of the protective cover 5 and the engagement grooves 15, 15, the engaged state can be easily released. Neither will there be any unreasonable gaps between the two.

Therefore, even if a workpiece is cut, etc. on the moving body 4, a total of three surfaces, the top surface and both side surfaces of the linear guide rail 1, are completely protected by the protective cover 5 in a substantially closed state. Needless to say, harmful dust such as fine chips will not enter the inside of the protective cover 5 from the bottom of the linear guide rail 1, and the linear guide will be well sealed. The rail 1 can be completely protected.

In addition, both lower ends 16 of the leading edge part of the protective cover 5
a, 16a protrude below the bracket 14, so the lower ends 16a, 16a also fit into the engagement grooves 15, 15 on both sides of the linear guide rail 1 in a hugging state. However, the linear guide rail 1 can be sufficiently protected even at the position closest to the moving body 4.

Furthermore, even when the linear guide rail 1 and the like are turned upside down as shown in FIG. 16, 16 are the engagement grooves 15, 15 of the linear guide rail 1.
If the protective cover 5 is inserted into the linear guide rail 1, the protective cover 5 will be bent due to its own weight.
This prevents the linear guide rail 1 from coming off, and even in this case, the linear guide rail 1 can be completely protected. However, in that case, the shape etc. of the engagement grooves 15, 15 should be appropriately changed in design so that both ends 16, 16 of the protective cover 5 do not easily come off from the engagement grooves 15, 15. It is preferable to keep it.

Next, when the movable body 4 is moved backward in the direction of arrow B, the protective cover 5 is sequentially wound around the winding shaft 6 along with the movable body 4. 5 is deformed so that it is sequentially unfolded into a flat state, contrary to when it is fed out, and is placed on a winding shaft 6 in a state similar to a normal sheet member or film member.
It is wound around.

Further, since the winding shaft 6 is rotated by the action of the spiral spring 8, there is no need to perform any other special work for winding up the protective cover 5.
The operation is very simple, and thereby it is possible to prevent the protective cover 5 from becoming inadvertently stuck between the movable body 4 and the winding shaft 6. Furthermore, since the surface of the protective cover 5 comes into contact with the wiper member 11 during winding, the dust attached to the surface is removed by the wiper member 11, and the cleaning is automatically performed. It is possible to achieve this objectively.

In the above embodiment, engagement grooves 15, 15 for engaging both ends of the protective cover 5 are provided on both sides of the linear guide rail 1 to prevent a gap from occurring between the two. Although the protection cover 5 is prevented from shifting in position very reliably, the above-mentioned engagement groove 15 is not an essential condition in the present invention.
For example, as shown in Fig. 5A, the linear guide rail 1
The two ends 16, 16 of the protective cover 5 are slidably and press-contacted to each other on both sides without providing the engaging grooves 15 on both sides of the protective cover 5, or the engaging grooves 15, 15 are separately provided. Instead, the recesses formed on both sides of the linear guide rail 1 may be used, or as shown in FIG. In any of these cases, the object of the present invention is achieved. It should be noted that the protrusions 17 shown in FIG.

Further, in the above embodiment, a guide body 9 of a predetermined shape is provided between the winding position of the protective cover 5 and the linear guide rail 1 to facilitate the winding and unwinding of the protective cover 5. Alternatively, a wiper member 11 is separately provided to suitably remove the dust adhering to the protective cover 5, but the guide body 9 and the wiper member 11 are not essential to the present invention. However, for practical purposes, it is preferable to provide these.

Further, at the position of the wiper member 11, a guide member 25 having three convex portions 26 on the inside as shown in FIG. 6 is separately provided, and the protective cover 5
By pressing the two ends 16, 16 and the top surface of the linear guide rail 1 into contact with the outer surface of the linear guide rail 1, the protective cover 5 can be forcibly deformed and expanded from a substantially C-shaped cross section to a planar shape. This has the advantage that the dimension 1 from the winding position of the protective cover 5 to the C-shaped deformation position in FIG. 1A can be shortened.

Furthermore, in the present invention, the configuration of the protective cover 5 is not limited to the above-mentioned embodiments, and its specific cross-sectional shape is mainly determined by the both ends of the protective cover 5, the both sides of the linear guide rail 1, and either the upper or lower side of the linear guide rail 1. It only needs to be C-shaped so that it can be hugged to the linear guide rail 1 so as to cover three sides, and the specific C-shape is appropriately designed in accordance with the shape of the linear guide rail 1 to be used. It is changeable. Furthermore, there are no particular restrictions on the specific material or dimensions, and it can be easily molded from a thin plate of metal, synthetic resin, or the like.

Furthermore, the means for connecting the tip of the protective cover 5 to the movable body 4 and the winding means on the rear side are not limited to those mentioned above. It is sufficient that the rear side thereof is provided so as to be freely wound up in a flat or substantially flat shape on the end side of the linear guide rail 1, and the rear side does not necessarily need to be wound up in a completely flat state.

In addition, the design of the specific configuration of each part constituting the device according to the present invention is subject to change, and it goes without saying that the linear guide rail 1, which is the subject of the present invention, can be used to guide various moving objects in a straight line. Of course, a shaft-shaped member having a spiral feed screw on the outer periphery also falls under the linear guide rail 1 according to the present invention, as long as the function of use is the same regardless of the difference in form.

(Effect of the invention) As mentioned above, in the present invention, a protective cover having resilient resilience is formed to have a substantially C-shaped cross section to cover three sides of the linear guide rail, including both sides and either the top or bottom side. and both ends of the protective cover are hugged to the linear guide rail in order to bring the three sides of the linear guide rail into a substantially closed state by being pressed against both sides of the linear guide rail by the elastic force of the protective cover. Because of this structure, the linear guide rail can be held in a press-contact state by the force of restoring the cross section of the protective cover to a substantially C-shaped cross section. It is now possible to completely seal three sides of the linear guide rail without creating an unreasonable gap between the linear guide rail and the protective cover during machine tool vibration or winding and unwinding of the protective cover.

As a result, the linear guide rails are thoroughly protected, and damage to the linear guide rails can be effectively prevented, and the service life and durability of the linear guide rails can be greatly improved.

Moreover, as described above, the present invention can protect the linear guide rail by pressing the protective cover against the linear guide rail, so even if the linear guide rail is in an upside-down position, the protective cover will not loosen inadvertently. This eliminates the problem of unreasonable gaps between the two, allowing the cover to be installed in any direction relative to the rail, and as a result, the protection function for the rail is more thorough and complete than before. At the same time, it has achieved the unique effect of being able to be used in a wide range of applications and in a variety of ways.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the device according to the present invention,
Figure A is a plan sectional view of the main part, Figure B is a front sectional view of the main part, and Figure C is a sectional view taken along line A--A in Figure B. FIG. 2 is an exploded perspective view showing the main parts. FIG. 3A is a perspective view of the main part of the tip of the protective cover, and FIG. 3B is a sectional view of the main part in the attached state. FIG. 4 is a sectional view showing another usage example. FIGS. 5A and 5B are sectional views of main parts of another embodiment. 6th
The figure is a sectional view showing another embodiment taken along line B--B in FIG. 1A. FIG. 7 shows a conventional example, where FIG. 7A is a side view and FIG. 7B is a sectional view of the main part. 1... Linear guide rail, 4... Moving object, 5
... Protective cover, 6 ... Winding shaft, 8 ... Spiral spring, 15, 15 ... Engagement groove.

Claims (1)

[Claims for Utility Model Registration] 1. The distal end of the protective cover 5 having an elastic restoring force is connected to the movable body 4 moving along the linear guide rail 1, and the rear side of the protective cover 5 resists the elastic force. In the protection device for a linear guide rail which is configured to be elastically deformed into a planar or substantially planar shape and can be wound up, the protective cover 5 covers both sides of the linear guide rail 1 and either the upper or lower surface of the linear guide rail 1. The protective cover 5 is formed into a substantially C-shaped cross section by its inward elastic force in order to cover three sides of the linear guide rail 1, and both ends of the protective cover 5 are pressed against both sides of the linear guide rail 1 by the elastic force of the protective cover 5. A protection device for a linear guide rail, characterized in that it is configured to be hugged by the linear guide rail 1 so that the three surfaces of the linear guide rail 1 are substantially closed. 2. The linear system according to claim 1, wherein engagement grooves 15, 15 for engaging both ends 16, 16 of the protective cover 5 are formed on both side surfaces of the linear guide rail 1. Protective device for guide rails. 3. The protection device for a linear guide rail according to claim 1 or 2, wherein the protective cover 6 can be wound around a winding shaft 6 rotationally biased by a spiral spring 8.