JPH0354828Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a protection device for linear guide rails that can suitably protect linear guide rails used in machine tools, etc. with a cover body. .

(Prior Art) Conventionally, the applicant has developed this type of protection device,
The one published in Utility Model Application Publication No. 62-150043 was developed first.

As shown in FIG. 4, this conventional device connects the tip of an elastically deformable protective cover 5 having a substantially C-shaped cross section to a movable body 4 that moves along a linear guide rail 1. The rear side of the linear guide rail 1 is deformed to have a flat cross-section on the winding shaft 20 on the side of one end of the linear guide rail 1 so that it can be freely wound.

According to this means, the protective cover 5 extended to the linear guide rail 1 side properly covers the upper surface side of the linear guide rail 1 while being restored to a substantially C-shaped cross section as shown in FIG. This effectively prevents chips, cutting oil, and other dust from adhering to the surface.

(Problems to be Solved by the Invention) However, in the conventional device, since a means for winding up the protective cover 5 on a winding shaft 20 supported at a fixed height position is adopted, the actual The following problems occurred during use.

That is, the winding diameter of the protective cover 5 decreases as the length of the protective cover extended toward the linear guide rail 1 increases. Therefore, for example, when the winding diameter d ₁ of the protective cover 5 is _large as shown by the two-dot chain line in FIG. Even if this is done, when the winding diameter d ₂ becomes smaller as shown by the solid line in the figure, the inclination angle α ₂ for feeding out the protective cover 5 toward the linear guide rail 1 side becomes larger.

However, when the inclination angle α ₂ of the protective cover 5 when it is extended increases as described above, the protective cover 5, which has a predetermined elasticity and rigidity, is greatly curved at the position E where it is extended toward the linear guide rail 1, and the protective cover 5 is bent toward the linear guide rail 1. A phenomenon occurs in which an unreasonable gap H is created between the two. Therefore, in the past, a situation occurred in which the linear guide rail 1 could not be properly protected at all times.
This has been a problem in the past.

Therefore, the purpose of the present invention is to make the tilt angle of the protective cover constant regardless of the winding diameter of the protective cover, and to appropriately eliminate the situation where the protective cover is unduly curved. That is.

(Means for solving the problem) The present invention does not wind up the protective cover at a fixed position as in the past, but the inclination angle of the protective cover from the winding side to the linear guide rail side is adjusted to the size of the winding diameter. The present invention is designed to solve the above-mentioned conventional problems by configuring the protective cover to be able to move up and down so that it can be maintained constant regardless of the situation.

That is, in the present invention, when the protective cover 5 wound up at a side position of one end of the linear guide rail 1 is unrolled toward the linear guide rail 1 side, the protective cover 5 is unrolled at the winding position. This is a protection device for a linear guide rail in which the winding side of the protective cover 5 is movable up and down so that the position is maintained at a substantially constant height.

(Function) In the linear guide rail protection device characterized by the above configuration, the winding side of the protective cover 5 moves up and down, and the unwinding height position of the protective cover 5 is adjusted regardless of the winding diameter. By maintaining the protective cover 5 at a substantially constant height position, the inclination angle at which the protective cover 5 is extended toward the linear guide rail 1 side is made constant, thereby eliminating undue curving of the protective cover 5. It is.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In Figure 1, 1 is a linear guide rail, and a workpiece mounting table 3 is placed on the bearing case 2 on the upper surface side of the rail.
A movable body 4 provided with a movable body 4 is slidably provided. Reference numeral 5 denotes a band-shaped protective cover whose one end 5a on the distal side is connected to the movable body 4, and is made of a highly elastic thin steel plate having a substantially C-shaped cross section and whose surface is coated with synthetic resin. . Note that the cross-sectional shape can be elastically deformed from a C-shape to a planar shape.

6 is a hollow casing cover connected to one end of the linear guide rail 1;
A case 8 having a hole 11 through which the rear side of the protective cover 5 is inserted is housed in the space 7 on the rear side so as to be vertically movable.

Reference numeral 9 denotes a winding drum which is externally fitted onto a shaft 10 which is pivotally supported by the case 8 to which the rear end of the protective cover 5 is fixed. It is always urged to rotate in one direction by a spiral spring 12 so that it can be rolled up in the unfolded state. Reference numeral 13 indicates an arc-shaped guide body provided along the winding position of the protective cover 5, and 14 indicates a coil spring for pressing and biasing the case 8 upward with a weak force. Reference numeral 15 denotes a guide that forms a gap 16 having a C-shaped cross section at the tip of the casing cover 6 to guide the protection cover 5 being drawn out from the inside of the case 8 .

The present embodiment has the above configuration, and an example of its use will be described next.

First, when the movable body 4 is moved in the direction of arrow a with the long protective cover 5 wound up inside the case 8 as shown in FIG. 1, it is wound around the winding drum 9. The protective cover 5 is sequentially extended toward the linear guide rail 1 against the biasing force of the spiral spring 12. Further, the protective cover 5 is restored to its original substantially C-shaped cross section on the linear guide rail 1 side as shown in FIG.

Therefore, when the protective cover 5 is extended, the tension T of the protective cover 5 and its elastic restoring force move the area from the extended position A to point C into a straight line along the extension line of the area in front of point C. In other words, it acts to correct the horizontal state. Therefore, due to this action, the winding side of the protective cover 5 and the case 8 that accommodates it are automatically set to a height position that makes the center position M of the protective cover 5 horizontal (note that this embodiment (In this case, the case 8 is set so as to be located exactly at the top of the rear space of the casing cover 6 when the winding dimension D of the protective cover 5 is maximum.)

Further, even when the protective cover 5 is unrolled in its long dimension and the winding diameter D is reduced as shown in FIG. 2, the tension and elastic restoring force of the unrolled protective cover 5 still acts on the winding side. As a result, the winding side receives a tensile force, and the case 8 descends against the weak elastic force of the coil spring 14, and its payout position B is at approximately the same height as the payout position A in FIG. It becomes the position. Furthermore, such an action causes the movable body 4 to move in the direction opposite to the direction a, and the protective cover 5
This can also be seen when winding up with the elastic force of the spiral spring 14. That is, as the winding diameter of the protective cover 5 increases, the winding side and the case 8 rise, and the unwinding position of the protective cover 5 on the winding side is automatically set to a substantially constant height position.

Therefore, the protective cover 5 that is unrolled from the winding side
The center position M of the protective cover 5 is always maintained in a horizontal state regardless of the size of the winding diameter D of the protective cover 5. As a result, the protective cover 5 extended toward the linear guide rail 1 properly covers the upper surface of the linear guide rail 1 without being unduly curved.

In the above embodiment, the protective cover 5 is wound up inside the case 8 having the winding drum 9 on which the spring force of the spiral spring 14 acts, and the case 8 is provided so as to be movable up and down. Specific winding means for the protective cover 5 and the rolled up protective cover 5
The means for setting the unit to be vertically movable is by no means limited to this.

For example, if the protective cover 5 is configured to be able to be wound up by its own elastic force, such as a spiral spring, it is not necessarily necessary to provide a member corresponding to the spiral spring 14 of the above embodiment. In such a case, a shaft or drum for winding up the protective cover 5 may be provided to be movable up and down. Further, as shown in FIG. 3, the protective cover 5 may be simply provided in a floating state in the space 18 of the casing cover 6 so as to be vertically movable without being wrapped around the shaft or the like.

In this way, the specific winding means and vertical movement means of the protective cover 5 according to the present invention can be freely changed in design. The point is that when the protective cover 5 is unrolled toward the linear guide rail 1 side, the winding side of the protective cover 5 is maintained at a substantially constant height at the winding position of the protective cover 5. It only needs to be able to move up and down.

The best angle for extending the protective cover is horizontal, but it may be slightly inclined. Furthermore, the height position at which the protective cover is unrolled does not need to be completely the same when the winding diameter is large and when the winding diameter is small. Some error is acceptable as long as it can prevent the protective cover 5 from curving to the extent that it does not practically impede the protection of the linear guide rail 1.

Furthermore, the present invention does not care about the winding direction of the protective cover 5. The point is that the protective cover 5, which has a substantially C-shaped cross section, is rolled up in a flat state. still,
If the guide body 13 as in the embodiment shown in FIG. 1 is provided, the guide body 13 can be
3 allows the protective cover 5 to be smoothly curved and guided, thereby eliminating the problem of undue bending of the protective cover 5 and prolonging its service life, which is preferable, but this means is not an essential requirement of the present invention. .

Furthermore, the present invention is not limited to the specific structure of the protective cover 5 as in the above embodiments. In short, it only needs to be formed into a substantially C-shaped cross section with elastic restoring force, and various materials such as metal and synthetic resin can be used for the material, and its length and dimensions can be changed depending on the purpose. Further, the specific manner of connection to the mobile body 4 is not limited.

In addition, the design of the present invention can be changed arbitrarily within the scope of the present invention, including the specific configuration of each part such as the linear guide rail 1 and the moving body 4, and the type of mechanical device to which it is applied is completely irrelevant. do not have.

(Effects of the invention) As mentioned above, the present invention provides the winding side of the protective cover so that it can move up and down, so that the height position of the protective cover extended toward the linear guide rail side is maintained at a substantially constant height position. Because of this structure, the inclination angle of the protective cover can always be maintained at a desired and appropriate constant angle, and it is possible to appropriately prevent large curvature on the linear guide rail side.

As a result, according to the present invention, the protective cover can be kept along the linear guide rail at all times to properly protect the rail, and has a special effect in that it is superior in terms of practical use compared to the conventional method.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of a protection device for a linear guide rail according to the present invention, in which A is a front sectional view of the main part and B is a plan sectional view of the main part. FIG. 2 is a front sectional view of the main part when the winding diameter of the protective cover is reduced.
FIG. 3 is an explanatory diagram showing another embodiment of the present invention. Fourth
5 and 5 show a conventional example, FIG. 4A is a perspective view, FIG. 4B is a sectional view taken along the line X--X of FIG. 1... Linear guide rail, 4... Moving object, 5
...protective cover.

Claims (1)

[Scope of utility model registration request] An elastically deformable rail protection cover 5 having a substantially C-shaped cross section and having a distal end connected to a movable body 4 that moves along the linear guide rail 1 is attached to the linear In a protection device for a linear guide rail which is provided at a side position of one end of the guide rail 1 in a state where it is deformed into a flat cross-sectional shape and can be freely rolled up, the protective cover 5 is moved toward the linear guide rail 1 side. The winding side of the protective cover 5 is vertically movable so that the winding position of the protective cover 5 is maintained at a substantially constant height when the protective cover 5 is unrolled. Protective device for linear guide rails.