JP6557993B2 - Dust-proof cover for linear motion guide device and linear motion guide device having the same - Google Patents

Description

  The present invention relates to a linear motion guide device including a guide rail and a slider slidably provided on the guide rail via a plurality of rolling elements, and is particularly mounted on this type of linear motion guide device. This relates to a dustproof cover mounting structure.

  In this type of linear motion guide device, a slider is slidably mounted on a guide rail via a plurality of rolling elements, and one of the guide rail and the slider moves relative to the other by rolling the plurality of rolling elements. Slide relative to each other. In this type of linear motion guide device, in particular, in the linear motion guide device incorporated in an automated line where precise movement is required, in order to prevent foreign matter such as dust, cutting waste and cutting oil from adhering to the outside, A dust cover is used to cover the exposed guide rail. For example, Patent Documents 1 and 2 disclose a conventional dust cover mounting method.

  In Patent Document 1, the dust-proof cover shown in FIG. 7 of the same document includes a bellows-shaped cover body that can be expanded and contracted in the longitudinal direction of the guide rail, and two mounting plates that are respectively attached to both ends of the cover body. Each mounting plate is provided with a screw mounting portion formed of a circular through hole, and female screws are formed on the guide rail end surface and the slider end surface at positions facing the screw mounting portion. As a result, when the dust cover is attached to the linear motion guide device, the mounting plate on the guide rail end surface side is attached to the guide rail end surface with a screw, and the mounting plate on the slider end surface side is attached to the slider end surface with a screw. It can be installed.

  Patent Document 2 includes a fixture that is formed separately from the dust-proof cover and is attached to the end surface of the slider, and a mounting plate that is provided on the dust-proof cover, and the mounting plate can be attached to and detached from the fixture. The structure is disclosed. Thereby, in the linear motion guide apparatus described in Patent Document 2, a dustproof cover can be attached by attaching a fixture to the slider end face in advance and then engaging the attachment plate with the fixture. Yes.

JP-A-9-264323 (paragraph 0006, FIG. 7) JP 2008-133939 A (paragraph 0008, FIG. 2)

  However, in the dustproof cover described in Patent Document 1, as shown in FIG. 5 (a), the screw mounting portion 121 formed on the mounting plate 120 on the slider end surface side is a circular through hole. As shown in the figure, when the dust cover 110 is mounted on the slider 103, the screw 14 cannot be inserted into the screw mounting section 121 unless the crests of the bellows-like stretchable section 111 of the dust cover 110 are crushed. There is a problem that the mounting work of 110 is difficult.

On the other hand, since the dustproof cover described in Patent Document 2 is provided with a separate mounting tool from the dustproof cover so that the mounting plate of the dustproof cover can be attached to and detached from the mounting tool, the mounting screw fixed to the slider is removed. Although the dust cover can be mounted without any problem, a separate tool from the mounting plate is required, which increases the cost. Moreover, since it is necessary to attach a fixture to the slider end surface in advance, an extra man-hour for attaching the dustproof cover is required.
Accordingly, the present invention has been made paying attention to the above-described problems, and a dust-proof cover for a linear motion guide device capable of improving the workability of attaching the dust-proof cover while suppressing an increase in cost, and the same It is an object to provide a linear motion guide device including

  In order to solve the above-described problems, a dustproof cover for a linear motion guide device according to an aspect of the present invention is provided so as to extend over a guide rail extending in a longitudinal direction and to be slidable on the guide rail via a plurality of rolling elements. A dustproof cover used between a side seal and an end surface of the guide rail, the guide rail including a slider and a side seal attached to both ends of the slider. A first mounting plate that is detachably fixed to the end surface of the slider by a screw, a second mounting plate that is detachably fixed to the slider by a screw while being superimposed on the side seal, and the first mounting A cover body that is provided between the plate and the second mounting plate and is extendable in the longitudinal direction of the guide rail so as to cover the guide rail, and the second mounting plate includes the slider Screw mounting portion formed for mounting the second mounting plate, characterized in that it becomes the second slit-like slots that lead to the end of the mounting plate.

Furthermore , in the dustproof cover for a linear motion guide device according to one aspect of the present invention, the second mounting plate has the screw mounting portions formed at two positions on both sides in the width direction of the slider, and the screw mounting at the two positions. parts are together with the slit-like slot is positioned parallel to one another or coaxially on the left and right side surfaces of the guide rails are formed so as to open toward both sides in the width direction of the slider, further, the first second mounting plate is characterized in that it is formed so as to be folded along the direction perpendicular to the extending direction of the slit of the threaded mounting portion from the central portion in the width direction of the slider.

  Furthermore, in order to solve the above-described problem, a linear motion guide device according to one aspect of the present invention is provided so as to extend over a guide rail extending in a longitudinal direction and to be slidable on the guide rail via a plurality of rolling elements. A linear motion guide device comprising a slider, a side seal attached to both ends of the slider, and a dustproof cover attached between the side seal and the end surface of the guide rail, wherein the dustproof cover A dustproof cover for a linear motion guide device according to one aspect of the invention is provided.

  According to the present invention, since the screw mounting portion of the second mounting plate is a slit-like groove hole leading to the end of the second mounting plate, the mounting screw is previously mounted on the slider from the side seal end face side. Then, temporarily tighten the screw into the internal thread of the slider, and then attach the second mounting plate so that it overlaps the side seal from the radial direction of the screw. The dustproof cover can be mounted by inserting the shaft portion into the screw mounting portion and then tightening the screws. Therefore, the workability of attaching the dustproof cover to the linear motion guide device is improved as compared with the case where the screw mounting portion of the second mounting plate is a circular through hole. In addition, since a separate mounting tool is not required for the mounting plate, an increase in cost can be suppressed.

  As described above, according to the present invention, it is possible to improve workability of attaching the dustproof cover while suppressing an increase in cost.

It is a perspective view explaining the linear guide which is one embodiment of the linear guide device concerning one mode of the present invention, and shows the state where the dustproof cover was removed. It is a front view (A arrow line view in FIG. 1) of only the 2nd attachment plate of the dustproof cover of FIG. It is a figure explaining the installation work of a dustproof cover, Comprising: The principal part which looked at the part of the dustproof cover of the linear guide of FIG. 1 from the side is shown, The figure (a) shows the state in the middle of installation, (b) Indicates the state after mounting. It is a figure explaining the modification of this invention, the figure (a) corresponds to FIG. 2, (b) is a top view which shows the state in the middle of mounting | wearing. It is a figure explaining the conventional dustproof cover, The figure (a) is a front view of the mounting plate by the side of a slider, (b) is a side view which shows the state in the middle of mounting, (c) is a side view which shows the state after mounting. FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings as appropriate. In the embodiment described below, the example in which the slider-side mounting plate 20 shown in FIG. 2 is mounted as the second mounting plate is a reference mode of the present invention, and the second mounting plate is shown in FIG. An example in which the slider-side mounting plate 20 is mounted is an embodiment of the present invention.
As shown in FIG. 1, the linear guide 1 includes a guide rail 2, a slider 3 having a U-shaped cross section straddling the guide rail 2 so as to be slidable, and a gap between the slider 3 and the end surface of the guide rail 2. And a dust-proof cover 10 to be mounted on.
The guide rail 2 is a steel rod-like member, and has rolling element rolling grooves 2m along the longitudinal direction on the left and right side surfaces 2s. The guide rail 2 is provided with a plurality of mounting holes 2c for rail mounting penetrating from the upper surface 2b to the lower surface 2r at a predetermined pitch along the longitudinal direction, and is a fixing bolt inserted through the mounting hole 2c. Fixed to a base such as a machine, robot, measuring instrument, precision positioning table.

  The slider 3 is a bowl-shaped member having a substantially U-shaped cross section, and includes a slider body 4 and two end caps 5 attached to both ends of the slider body 4. Further, two side seals 6 are attached to both ends of each end cap 5. Each side seal 6 is formed of a cored bar made of a plate material such as alloy steel and a polymer material seal bonded to the cored bar. The seal is provided with a lip portion that is in sliding contact with the guide rail 2. As the polymer material, nitrile rubber, hydrogenated nitrile rubber, acrylic rubber, fluorine rubber, ethylene propylene rubber, styrene butadiene rubber, polyester elastomer, urethane elastomer and the like can be applied. Moreover, as a material of the core metal, steel plates such as SPCC and SPHC can be applied.

  A plurality of screw holes 4n are provided on the upper surface 4t of the slider body 4, and a moving table or the like is attached by bolts using the screw holes 4n. On the inner side surface of the slider 3, rolling element rolling grooves (not shown) that face the left and right rolling element rolling grooves 2 m of the guide rail 2 are formed. The end cap 5 is provided with a direction changing path that connects the load path formed by the rolling element rolling grooves and the return path of the slider body 4 to form a circulation path. In the circulation path, a plurality of balls (or rollers) (not shown) are interposed as rolling elements so as to be freely rollable. The plurality of rolling elements circulate through a circulation path provided in the slider 3 when the slider 3 moves on the guide rail 2. Thereby, the slider 3 can be smoothly slid along the axial direction on the guide rail 2 through the rolling of the rolling elements.

Next, the dustproof cover 10 attached to the linear guide 1 and its attachment structure will be described.
On both end faces 2a in the longitudinal direction of the guide rail 2, mounting screw holes 2d for mounting the dust cover 10 are formed at two places in the width direction. The side seals 6 are provided with insertion holes 6h on the left and right of the upper part through which the mounting screws 14 for fixing the slider-side mounting plate 20 of the dust cover 10 are inserted. The end cap 5 is also provided with an insertion hole (not shown) through which the mounting screw 14 is inserted at a position facing the insertion hole 6h. Further, an attachment screw hole (not shown) for screwing the attachment screw 14 is formed on the end surface of the slider body 4 at a position facing the insertion hole 6h. In the figure, one end portion of the guide rail 2 is illustrated, and the other end portion has the same configuration including the dustproof cover 10, and therefore illustration and description thereof are omitted.

The dust cover 10 includes a cover body 11 and two attachment plates 20 and 30 provided at both ends of the cover body 11.
The cover body 11 is a rectangular duct-shaped member having a lower surface made of a waterproof cloth or a heat-resistant cloth, and is formed in a bellows shape in which a plurality of peak portions 11m and valley portions 11v are alternately arranged. It is formed to be stretchable in the direction. A shape maintaining mandrel 12 having a substantially U-shape is joined to the peak portion 11m of the cover body 11 at a predetermined interval (hatching portion shown in FIG. 1). Thereby, when the cover main body 11 expands and contracts, the cover main body 11 is not bent and buckled.

The cover body 11 has a rail-side mounting plate 30 joined to one end in the longitudinal direction and a slider-side mounting plate 20 joined to the other end.
The rail-side mounting plate 30 that is the first mounting plate is a steel thin plate member, and is a rectangular plate-like member having the height of the guide rail 2 and the width of the slider 3. The rail side mounting plate 30 is formed with circular screw mounting portions 31 penetrating in the plate thickness direction at positions facing the two mounting screw holes 2 d of the guide rail 2, and screwed to the end surface 2 a of the guide rail 2. 16 is detachably fixed.

  The slider-side mounting plate 20, which is the second mounting plate, is a steel thin plate member, and is formed in a gate shape having a U-shape substantially similar to the cross-sectional shape of the slider 3. The slider-side mounting plate 20 is detachably fixed to the slider 3 with screws 14 while being superimposed on the end surface of the side seal 6. As shown in FIG. 2, the slider-side mounting plate 20 has a U-shaped central recess 24 that is wider than the width in the direction perpendicular to the longitudinal direction of the guide rail 2 and deeper than the height of the guide rail 2. The escape portion does not interfere with the guide rail 2.

  The slider-side mounting plate 20 has a pair of sleeve portions 23 on both the left and right sides of the central recess 24, and screw attachment portions 21 are formed on each sleeve portion 23 at two locations on both sides in the width direction of the slider 3. ing. The screw mounting portion 21 is formed to penetrate in the plate thickness direction so that the mounting screw 14 is inserted at a position facing the insertion hole 6h of the side seal 6 shown in FIG. In the example of the present embodiment, the screw mounting portion 21 is a slit-like groove opening up to the end 22 on the upper surface side of the slider-side mounting plate 20, and the left and right slit-like groove holes are mutually connected. It is formed so as to open in parallel and toward the side opposite to the guide rail 2 side.

Next, operations and effects of the linear guide 1 including the dust cover 10 will be described.
The linear guide 1 is attached by fastening the guide rail 2 to a base (not shown) with a bolt inserted into the mounting hole 2c, and fitting the slider 3 to the guide rail 2 via a rolling element. Install in.
Here, in the linear guide 1, when a particularly precise movement is required for the slider 3, dust prevention of the upper surface 2b of the guide rail 2 exposed to the outside and the rolling element rolling groove 2m becomes an important problem. This is because if foreign matter such as dust, welding powder, cutting oil, etc. adhering to the rolling element rolling groove enters the inside of the slider 3, smooth rolling of the rolling element is hindered and the desired accuracy cannot be ensured. .

Therefore, the linear guide 1 has a dust-proof cover 10 attached between the end of the slider 3 and the end surface 2 a of the guide rail 2.
When attaching the dust cover 10 to the linear guide 1, first, the rail side mounting plate 30 is abutted against the end surface 2 a of the guide rail 2, and the two mounting screws 16 are inserted into the mounting screw holes 2 d of the end surface 2 a of the guide rail 2. The rail side mounting plate 30 is fixed, and then the slider side mounting plate 20 is overlaid on the end surface of the side seal 6 of the slider 3, and then the two mounting screws 14 are tightened to fix the slider side mounting plate 20 to the end of the slider 3. Secure to the part.

  Here, in the linear guide 1 of this embodiment, when the slider side mounting plate 20 is fixed, as shown in FIG. 3A, the mounting screw 14 is inserted in advance through the insertion hole 6 h of the side seal 6 in the middle. It is set as the temporary fastening state screwed in the edge part of the slider 3 to a position. Next, the slider side mounting plate 20 is slid from the lower side in the radial direction of the mounting screw 14, and the shaft portion of the mounting screw 14 is inserted into the screw mounting portion 21 through the opening at the upper end of the slit of the screw mounting portion 21. Then, the slider side mounting plate 20 is overlaid on the side seal 6 of the linear guide 1 with the slider side mounting plate 20 in contact with the surface of the side seal 6. Thereafter, as shown in FIG. 3B, the mounting screw 14 is tightened to attach the slider side mounting plate 20 to the end of the slider 3.

  Accordingly, the dustproof cover 10 is attached between the side seal 6 and the end surface 2a of the guide rail 2, and the cover body 11 covers the upper surface 2b of the guide rail 2 and the left and right side surfaces 2s of the linear guide 1 while moving the slider. 3 is provided so as to be extendable in the longitudinal direction of the guide rail 2 in accordance with the movement of the guide rail 2. 1 shows an image in which the dustproof cover 10 is attached to the linear guide 1 with the mounting screws 14 and 16.

  When removing the attached dust cover 10 from the linear guide 1, the slider side mounting plate 20 is loosened without completely removing the mounting screws 14 fixing the side seal 6, and the slider side mounting plate 20 is used by hand. By moving the mounting screw 14 relatively upward along the slit-like slot of the screw mounting portion 21 by pushing down obliquely toward the guide rail 2 side, the slider-side mounting plate 20 and the side seal 6 are moved. And the slider-side mounting plate 20 can be removed from the slider 3.

Thus, according to this linear guide 1, the cover body 11 is attached with one end fixed to the end face of the side seal 6 on the slider 3 side and the other end fixed to the end of the guide rail 2. Since the cover main body 11 expands and contracts, the upper surface 2b and the left and right side surfaces 2s of the guide rail 2 can always be entirely covered, and dust can be reliably protected.
According to the linear guide 1, the two left and right screw mounting portions 21 formed on the slider-side mounting plate 20 for fixing the cover body 11 are slit-like to connect to the upper end portion of the slider-side mounting plate 20. Therefore, the mounting screw 14 for mounting is preliminarily tightened into the female screw of the slider 3 and the slider side mounting plate 20 is slid from the lower side in the radial direction of the screw. Can be attached to the slider 3.

  Therefore, compared to the case where the screw mounting portion of the slider side mounting plate 20 is a circular through hole, the slider side mounting plate 20 can be mounted without crushing the peaks of the bellows-shaped cover body 11 of the dustproof cover 10. The workability of attaching the dust-proof cover 10 to the door is improved. Further, since a separate fixture is not necessary for the slider side mounting plate 20, an increase in cost can be suppressed.

The dust-proof cover for a linear motion guide device and the linear motion guide device including the same according to the present invention are not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. .
For example, in the above embodiment, the slider-side mounting plate 20 has screw mounting portions 21 formed at two locations on both sides in the width direction of the slider 3, and the two screw mounting portions 21 are parallel to each other and of the guide rail 2. Although the example of the slit-shaped slot opening toward the side opposite to the side has been described, the dustproof cover according to the present invention is not limited to this, and the screw mounting portion 21 may be used as long as the fixing is securely performed. It is good also as one place, and you may provide three or more places as needed.

In the dustproof cover according to the present invention, the slider mounting plate 20 as the second mounting plate has a screw mounting portion 21 for mounting the slider mounting plate 20 on the side seal 6 to the end of the plate. Any slit-shaped slot can be used.
For example, as shown in a modification in FIG. 4, the left and right screw mounting portions 21 formed on the slider-side mounting plate 20 are opened to the left and right sides of the slider-side mounting plate 20 so as to open toward both sides in the width direction of the slider 3. It can also be a slit-like slot leading to the end.

Further, in this example, as shown in FIG. 5A, the slider-side mounting plate 20 is composed of a left member 20A and a right member 20B divided from the center thereof, and the left member 20A and the right member 20B are The slider-side mounting plate 20 can be bent from the center in the left-right direction.
According to this modified example, as shown in FIG. 5B, the mounting screw 14 for mounting is preliminarily screwed into the female screw of the slider 3 and is projected from the center to the side opposite to the slider 3. The slider-side mounting plate 20 in a bent state is slid from the center side of the slider 3 in the radial direction of the mounting screw 14, so that the mounting screw 14 can be moved from the end openings of the left and right screw mounting portions 21. The shaft portion can be inserted into the screw mounting portion 21.

Next, the slider-side mounting plate 20 is brought into contact with the surface of the side seal 6 by pushing the central portion of the slider-side mounting plate 20 bent in the center in the direction of the arrow indicated by the symbol B in FIG. Then, the slider-side mounting plate 20 is overlaid on the side seal 6 of the linear guide 1.
Thereafter, the dust-proof cover 10 can be mounted by tightening the mounting screws 14. Therefore, even with such a configuration, the workability of attaching the dustproof cover 10 to the linear guide 1 is improved as compared with the case where the screw mounting portion of the slider side mounting plate 20 is a circular through hole. Further, since a separate fixture is not necessary for the slider side mounting plate 20, an increase in cost can be suppressed.

1 Linear guide (linear motion guide device)
2 Guide rail 3 Slider 4 Slider main body 5 End cap 6 Side seal 10 Dust-proof cover 11 Cover main body 12 Core metal 14, 16 Mounting screw 20 Slider side mounting plate (second mounting plate)
21 Screw mounting part (slit slot)
30 Rail side mounting plate (first mounting plate)
31 Screw mounting part

Claims (2)

Used in a linear motion guide device comprising a guide rail extending in the longitudinal direction, a slider slidably mounted on the guide rail via a plurality of rolling elements, and side seals attached to both ends of the slider. A dust-proof cover attached between the side seal and the end face of the guide rail,
A first mounting plate that is detachably fixed to the end surface of the guide rail with a screw; a second mounting plate that is detachably fixed to the slider with a screw in a state of being superimposed on the side seal; A cover body that is provided between one mounting plate and the second mounting plate and is extendable in the longitudinal direction of the guide rail so as to cover the guide rail;
Said second mounting plate, threaded mounting portion formed for mounting the second mounting plate to said slider, has become a slit-like slot which is open to the end of the second mounting plate Further, the screw mounting portions are formed at two locations on both sides of the slider in the width direction, and the two screw mounting portions are arranged such that the slit-like grooves are parallel or coaxial with each other on the left and right side surfaces of the guide rail. And is formed so as to open toward both sides in the width direction of the slider,
Further, the second mounting plate is formed so as to be bendable from a center portion in the width direction of the slider along a direction orthogonal to the extending direction of the slit of the screw mounting portion. Dust-proof cover for motion guide devices. A guide rail extending in the longitudinal direction, a slider slidably mounted on the guide rail via a plurality of rolling elements, a side seal attached to both ends of the slider, the side seal and the guide rail A linear motion guide device provided with a dustproof cover attached between the end face of
A linear motion guide device comprising the dustproof cover for a linear motion guide device according to claim 1 as the dustproof cover.

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