JP2014178025A - Linear motion guide apparatus, protective sheet for side seal lip, attachment for temporary shaft - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a side seal lip from being damaged when a slider is attached to a guide rail.SOLUTION: A side seal 30 having lips 33 slidably contacted with a rear surface 10a and both side surfaces 10b of a guide rail 10 is attached to the end part of the slider 20 in its moving direction so as to seal a space formed between the guide rail 10 and the slider 20. An entire sliding contact surface of the lips 33 with the guide rail 10 is covered by a protective sheet 7. The protective sheet 7 is bonded to the surface of each of the lips 33 by an adhesive agent that can be peeled.

Description

  The present invention relates to a linear motion guide device (linear guide device), a protective sheet for protecting a lip portion of a side seal constituting the linear motion guide device, and an attachment for a temporary shaft used by being attached to a temporary shaft of the linear motion guide device. .

  Conventionally, a linear motion guide device used in a machine tool or the like includes a guide rail, a slider, and a plurality of rolling elements. The guide rail has a rolling element rolling surface extending in the longitudinal direction on the outer surface. The slider has a rolling element rolling surface formed to face the rolling element rolling surface of the guide rail, and spans the guide rail through the rolling element so as to be relatively movable along the longitudinal direction of the guide rail. It is built.

Further, a side seal having a lip portion slidably in contact with the back surface (upper surface) and both side surfaces of the guide rail seals a gap formed between the guide rail and the slider at an end portion in the moving direction of the slider. It is attached as follows.
More specifically, the slider includes a slider body and end caps attached to both end surfaces of the slider body in the relative movement direction (longitudinal direction of the guide rail). A seal is installed. When foreign matter such as dust, dust, chips, chips and the like enters from the gap formed between the guide rail and the slider and adheres to the rolling element rolling surface, smooth rolling of the rolling element is hindered.

The side seal contacts the guide rail and seals the opening of the gap in order to prevent foreign matter from entering the gap. This ensures good operability of the linear motion guide device. The lip portion of the side seal is in contact with the surface from one side surface of the guide rail to the other side surface through the back surface.
Since the lip portion of the side seal is always in sliding contact with the surface of the guide rail, it protrudes closer to the rail than the slider. Moreover, in order to ensure sealing performance, it is formed of a relatively fragile material such as rubber. Therefore, the lip portion of the side seal is easily damaged by unevenness such as a guide rail with which the lip portion is in sliding contact.

When assembling the linear motion guide device, the operation of mounting the slider on the guide rail is performed according to the following procedure. First, a slider with a side seal already mounted and a rolling element incorporated therein is straddled over a temporary shaft that is produced by matching the shape and dimensions of the guide rail. Next, the slider is moved from the temporary shaft to the guide rail with the temporary shaft connected in series to the end of the guide rail.
At this time, if there is a step or unevenness between the temporary shaft and the guide rail, the lip portion of the side seal may be damaged. In addition, after the slider has been transferred to the guide rail, the lip portion of the side seal may be damaged by an attachment hole (a hole into which the attachment bolt is inserted) opened on the back surface of the guide rail.

During operation of the linear motion guide device, the mounting hole is closed, so that the lip portion is not likely to be damaged. However, at the time of a trial operation for checking the mounting state of the guide rail, the mounting hole is not blocked, and there is a risk of the damage as described above.
As a conventional technique for preventing damage to the lip portion of the side seal, there is a protector described in Patent Document 1. This protective device is a member having a so-called roll pin shape, has a substantially U-shaped cross section, and has a slit obtained by cutting a part of a cylinder along its longitudinal direction. This protective device is made of a thin steel strip having a spring property or a synthetic resin excellent in moldability. The outer surface of this protective device is smooth and has a smaller coefficient of friction than the lip portion of the side seal.

  This protective device covers the outer surface of the side seal by fitting the portion of the lip portion of the side seal that is in sliding contact with the back surface of the guide rail using the slit. As a result, when the slider moves along the guide rail, the outer surface of the protector is in contact with the guide rail in the portion of the lip portion that contacts the back surface of the guide rail, and the lip portion does not contact the back surface of the guide rail. For this reason, the part which touches the back surface of a guide rail among lip parts is protected by this protector.

  As another technique for preventing damage to the lip portion of the side seal, there is a damage prevention component described in Patent Document 2. The back surface of the guide rail is covered with a rail cover in order to close the mounting hole opened on the back surface of the guide rail. However, since the rail cover is exposed at the end of the guide rail without covering the corners on the back, the rail cover is only the thickness of the rail cover between the position where the rail cover is located and the position where the rail cover is not present. A step will be formed.

Therefore, as described above, when the slider is moved from the temporary shaft to the guide rail, the lip portion of the side seal may be damaged by the step. For this reason, in the technique described in Patent Document 2, a damage prevention component that covers the stepped portion at the end of the guide rail is attached.
On the other hand, in Patent Document 3, a thin protrusion that protrudes so as to abut against the end of the rail cover that covers the guide rail is aligned with the axial direction of the temporary shaft (a direction that is aligned with the longitudinal direction of the guide rail). ) Disclosed is a technique provided at the end. When the slider on the temporary shaft is transferred to the guide rail, the inner seal rides on the protrusion of the temporary shaft, so that the inner seal is prevented from interfering with the rail cover.

  Further, Patent Document 4 discloses a temporary shaft in which the outer shape of a cross section perpendicular to the axial direction is not uniform in the axial direction. With such a configuration, the slider on the temporary shaft can be smoothly moved to the guide rail. Further, the size of the cross-sectional outer shape of at least one end of the temporary shaft is larger than the size of the cross-sectional outer shape of the guide rail, and the size of the cross-sectional outer shape of the central portion of the temporary shaft is substantially the same as the cross-sectional outer shape of the guide rail. It is said that.

Further, from the axial end portion of the temporary shaft, a thin plate-like protruding portion is projected along the outer periphery of the end portion of the temporary shaft. Therefore, it is possible to move the slider from the temporary shaft to the guide rail without damaging the side seal.
Further, Patent Document 5 discloses a temporary shaft whose cross-sectional outer shape is not uniform in the axial direction. With such a configuration, the slider on the temporary shaft can be smoothly moved to the guide rail.

  Further, the cross-sectional shape of the temporary shaft is substantially the same as the cross-sectional shape of the guide rail of the linear motion guide device, and the size of the cross-sectional external shape of at least one end of the temporary shaft is larger than the size of the cross-sectional external shape of the guide rail. It is large and the size of the cross-sectional outer shape of the central portion of the temporary shaft is supposed to be smaller than the size of the cross-sectional outer shape of the guide rail. Further, a plurality of slits extending in the axial direction are formed on the thin plate-like projecting portion provided at the rail side end portion so as to be aligned along the circumferential direction, and can be elastically deformed inward.

JP 2009-121648 A JP 2012-2276 A JP 2008-57690 A JP 2008-82504 A JP 2012-67838 A

As described above, in the method described in Patent Document 1, only the portion of the lip portion of the side seal that contacts the back surface of the guide rail is protected, and the portion that contacts both side surfaces of the guide rail is not protected.
In the method described in Patent Document 2, only the portion of the lip portion of the side seal that contacts the back surface of the guide rail and the vicinity thereof are protected, and the majority of the portion that contacts both side surfaces of the guide rail is protected. Not. Moreover, the damage prevention component described in Patent Document 2 can be applied only to a guide rail whose rear surface is covered with a rail cover.

As described above, the conventional technique for preventing damage to the lip portion of the side seal described in Patent Documents 1 and 2 includes the lip of the side seal regardless of whether the rail cover is provided on the guide rail. There is room for improvement in that the entire part is protected from unevenness on the guide rail side.
Further, the temporary shafts described in Patent Documents 3 to 5 have room for improvement in that the side seal and the temporary shaft are prevented from being damaged when the slider is moved from the temporary shaft to the guide rail.

  An object of the present invention is to prevent damage to the lip portion of the side seal when the slider is attached to the guide rail.

[Aspect 1]
In order to solve the above-described problems, aspect 1 of the present invention provides a linear motion guide device having the following configurations (1) and (2).
(1) Consists of a guide rail, a slider, and a plurality of rolling elements. The guide rail has a rolling element rolling surface extending in the longitudinal direction on the outer surface. The slider has a rolling element rolling surface formed to face a rolling element rolling surface of the guide rail, and is relatively movable along the longitudinal direction with the guide rail via the rolling element. It is straddled. A side seal having a lip portion slidably contacting the back surface and both side surfaces of the guide rail is attached to an end portion in the moving direction of the slider so as to seal a gap formed between the guide rail and the slider. It has been.

(2) The entire sliding surface of the lip portion with the guide rail is covered with a protective sheet, and the protective sheet is adhered to the surface of the lip portion with a peelable adhesive.
The linear motion guide device according to the first aspect has the above-described configuration (2), so that when the slider is moved from the temporary shaft to the guide rail, even if there is unevenness that the slider gets over, the linear guide device has an opening at the back of the guide rail. Even if there is a mounting hole, the lip portion does not directly contact the unevenness or the mounting hole. For this reason, damage to the lip portion can be prevented, and when the linear motion guide device is in operation, if the protective sheet is peeled off, the lip portion comes into direct contact with the guide rail, so that a sealing function by the lip portion is obtained.

[Aspect 2]
Aspect 2 of the present invention has the above configurations (1) and (2) and the following configurations (3) to (5).
(3) The tip line of the lip portion that is in sliding contact with the guide rail has a plurality of corner portions corresponding to a cross-sectional shape perpendicular to the longitudinal direction of the guide rail.
(4) On one side of the protective sheet, cuts are formed at positions corresponding to the plurality of corners.
(5) The protective sheet has the surface on which the cut is formed facing the lip portion, and the peelable adhesive disposed in the space formed by the cut and the lip portion, Bonded to the surface of the lip.

[Aspect 3]
Aspect 3 of the present invention has the following configuration (6) in the linear motion guide devices of aspects 1 and 2.
(6) The protective sheet includes a plurality of sheet pieces divided in a direction along a tip line that is in sliding contact with the guide rail of the lip portion.

[Aspect 4]
Aspect 4 of the present invention is a protective sheet for protecting the sliding contact surface of the lip portion with the guide rail of the linear guide device having the configuration (1), and has the following configuration (7) I will provide a.
(7) The lip portion has a length that is greater than or equal to the length of the tip line in sliding contact with the guide rail and a width that is greater than or equal to the dimension of the lip portion in the moving direction.
The “length of the tip line” is synonymous with “the total length of the lip portion extending in the direction from one side surface of the guide rail to the other side surface through the back surface”.

[Aspect 5]
Aspect 5 of the present invention is the protective sheet of aspect 4 and has the following configuration (8).
(8) An adhesive that can be peeled off from the lip portion is provided on one surface.
[Aspect 6]
Aspect 6 of the present invention is the protective sheet of aspect 4 and has the following configuration (9).
(9) The tip line of the lip portion that is in sliding contact with the guide rail has a plurality of corner portions corresponding to a cross-sectional shape perpendicular to the longitudinal direction of the guide rail, and corresponds to the plurality of corner portions on one surface. An incision is formed at the position to be.

[Aspect 7]
Aspect 7 of the present invention is the protective sheet according to aspects 4 to 6 and has the following configuration (10).
(10) The lip portion includes a plurality of sheet pieces divided in a direction along a front end line that is in sliding contact with the guide rail.
This “direction along the tip line” is synonymous with “the extending direction of the lip portion extending in the direction from one side surface of the guide rail to the other side surface through the back surface”.

[Aspect 8]
Aspect 8 of the present invention provides a temporary shaft attachment for a linear motion guide device having the following configurations (11) to (14).
(11) The slider assembled to the temporary shaft is moved in the axial direction of the temporary shaft (in a direction aligned with the longitudinal direction of the guide rail), and the linear guide device is configured with the slider from the temporary shaft. Used when transferring the slider to the guide rail. Of the both axial end portions of the temporary shaft, it is attached to the axial end portion disposed on the guide rail side so as to be coaxial with the temporary shaft and arranged in a straight line. The cross-sectional shape perpendicular to the axial direction is substantially the same as the temporary shaft, and the temporary shaft side end that is the axial end on the side attached to the temporary shaft, and the side facing the longitudinal end of the guide rail It has a rail side end which is the axial direction end.

(12) The entire cross section perpendicular to the axial direction (the cross section when cut along a plane orthogonal to the axial direction) increases smoothly from the temporary shaft side end to the rail side end. Has a shape.
(13) The size of the cross section of the temporary shaft side end is substantially the same as the size of the cross section of the axial end of the temporary shaft to be attached, and the size of the cross section of the rail side end is It is larger than the size of the cross section of the shaft side end.
(14) The outer peripheral surface of the rail side end is elastically deformable inward.
According to the temporary shaft attachment of aspect 8, when the slider is moved from the temporary shaft to the guide rail, damage to the side seal and the inner seal can be suppressed, and damage to the temporary shaft can be prevented.

[Aspect 9]
Aspect 9 of the present invention is the temporary shaft attachment according to Aspect 8, and has the following configuration (15).
(15) The rail-side end portion has a plate-like protruding portion protruding in the axial direction, the protruding portion forms the outer peripheral surface, and axially extends on both side surfaces (left surface and right surface) of the protruding portion. A slit extending in the direction is formed.

[Aspect 10]
A tenth aspect of the present invention is the temporary shaft attachment according to the eighth aspect, and has the following configuration (16).
(16) A slit extending in the axial direction is formed on the upper surface of the protrusion.
[Aspect 11]
Aspect 11 of the present invention is the temporary shaft attachment according to Aspect 8, and has the following configuration (17).
(17) At least the rail side end portion is made of an elastic material.

[Aspect 12]
Aspect 12 of the present invention is the temporary shaft attachment according to Aspect 11, and has the following configuration (18).
(18) The elastic material is rubber.
[Aspect 13]
Aspect 13 of the present invention is the temporary shaft attachment according to Aspect 11, and has the following configuration (19).
(19) The elastic material is a thermoplastic elastomer.

[Aspect 14]
According to a fourteenth aspect of the present invention, the linear motion includes a guide rail and a temporary shaft to which the temporary shaft attachment according to any of the ninth to thirteenth aspects is attached and a slider in which a rolling element is incorporated. A guidance device is provided.

  According to the present invention, damage to the lip portion of the side seal is prevented when the slider is attached to the guide rail.

It is a front view which shows the linear motion guide apparatus of 1st Embodiment. It is a side view which shows a part of linear motion guide apparatus of FIG. It is AA sectional drawing of FIG. 1, Comprising: It is the figure which abbreviate | omitted and showed the guide rail and the rolling element. It is a front view which shows the linear motion guide apparatus of 2nd Embodiment. It is an enlarged view of the A section of FIG. It is a top view which shows the mount with which the some protective sheet was affixed. It is a front view which shows the linear motion guide apparatus of 3rd Embodiment. It is a side view which shows a part of linear motion guide apparatus of FIG. It is AA sectional drawing of FIG. 7, Comprising: It is the figure which abbreviate | omitted and showed the guide rail and the rolling element. It is a side view which shows a part of protective sheet which comprises the linear motion guide apparatus of FIG. It is an enlarged view of the B section of FIG. It is an enlarged view of the C section of FIG. In 4th Embodiment, it is a perspective view explaining the structure of the linear motion guide apparatus. It is a front view of the linear guide apparatus of FIG. In 4th Embodiment, it is a partial expanded sectional view explaining the structure of an inner seal. In 4th Embodiment, it is a perspective view explaining the method of mounting | wearing a guide rail with the slider temporarily assembled | attached to the temporary shaft. In 4th Embodiment, it is a side view explaining one Embodiment of the attachment for temporary shafts. It is a front view of the attachment for temporary shafts of FIG. In 4th Embodiment, it is a perspective view (a) which shows the temporary shaft set before coupling | bonding, and a perspective view (b) which shows the temporary shaft set after coupling | bonding. In 4th Embodiment, it is a perspective view explaining the attachment for temporary shafts of a modification. In 4th Embodiment, it is a perspective view explaining the example which fixes the attachment for temporary shafts to a temporary shaft using a screw. In 4th Embodiment, it is a perspective view explaining the example in which the attachment for temporary shafts was integrated with the temporary shaft. In 5th Embodiment, it is the perspective view (a) which shows the temporary shaft set before coupling | bonding, and the perspective view (b) which shows the temporary shaft set after coupling | bonding. In 5th Embodiment, it is a side view explaining a temporary axis | shaft attachment. In 5th Embodiment, it is a perspective view explaining the usage method of a temporary shaft set. In 5th Embodiment, it is a perspective view which shows the modification of a temporary shaft set. In 5th Embodiment, it is a perspective view which shows the modification of the attachment structure of a temporary shaft attachment and a temporary shaft. It is a figure (partial side view and partial sectional view) explaining the details of the mounting structure of FIG.

Embodiments of the present invention will be described below, but the present invention is not limited to these embodiments.
[First Embodiment]
A linear motion guide device corresponding to the first embodiment of the present invention will be described with reference to FIGS. In these drawings, the illustration of a part that is well-known as the structure of the linear motion guide device and that is not directly related to the present invention, such as the rolling element, the return passage of the rolling element, and the screw hole is omitted. Yes.

  As shown in FIGS. 1 and 2, the linear motion guide device of the first embodiment includes a guide rail 10, a slider 20, a large number of rolling elements (not shown), and a side seal 30. The slider 20 includes a slider main body 21 and two end caps 22. The guide rail 10 and the slider main body 21 have rolling element rolling surfaces that are arranged to face each other and extend in the longitudinal direction of the guide rail 10. The rolling elements are arranged in a rolling path formed by both rolling element rolling surfaces, a return path and a direction changing path formed in the slider 20.

The slider 20 is straddled with respect to the guide rail 10 through a rolling element so as to be relatively movable along the longitudinal direction of the guide rail 10. End caps 22 are disposed at both ends of the slider body 21 in the moving direction. The side seals 30 are attached to both ends of the slider 20 in the moving direction.
In many cases, the linear motion guide device is disposed such that the longitudinal direction and the width direction of the guide rail 10 are horizontal, and the slider 20 is straddled on the upper surface (back surface) of the guide rail 10. Therefore, also in this embodiment, the longitudinal direction of the guide rail, the slider moving direction, the vertical direction, and the horizontal direction (width direction) will be described along this example. Therefore, when a change such as an inclination in the longitudinal direction, the vertical direction, or the left-right direction of the guide rail 10 is made, the direction or inclination of each part is interpreted according to the posture.

The guide rail 10, the slider 20 including the slider body 21 and the end cap 22, and the side seal 30 are all the same as those used in a commonly used linear guide device.
The side seal 30 includes a metal reinforcing plate 31, a rubber plate-like portion 32, and a lip portion 33. The side seal 30 is formed by welding rubber to one surface of the reinforcing plate 31 using a mold. A lip portion 33 is formed. An oil supply hole 31 a that communicates with the oil supply hole 23 of the end cap 22 is formed in the reinforcing plate 31. The rubber plate-like portion 32 is formed with an oil supply hole 32a having a diameter larger than that of the oil supply hole 31a.

The lip 33 is formed inside the side seal 30 (on the side facing the guide rail 10). The lip portion 33 includes a downward lip 33a that is in sliding contact with the upper surface 10a of the guide rail 10, and a lateral lip 33b that is in sliding contact with the left and right side surfaces 10b of the guide rail 10. Each lateral lip 33b extends downward continuously from the left and right of the downward lip 33a.
As shown in FIG. 3, a cage 4 that holds rolling elements is installed between the end caps 22. An inner seal 5 is attached to the upper side of the cage 4, and an under seal 6 is attached to the lower side. The lip portions of the inner seal 5 and the under seal 6 are both in sliding contact with the side surface 10 b of the guide rail 10.

The inner seal 5 prevents dust or the like from the upper surface 10 a side of the guide rail 10 from entering between the side surface 10 b of the guide rail 10 and the slider 20. The under seal 6 prevents dust or the like from below from entering between the side surface 10 b of the guide rail 10 and the slider 20.
The lip portions of the inner seal 5 and the under seal 6 are abutted against the side surfaces of the lip portion 33 (lateral lip 33b) of the side seal 30. Thereby, intrusion of dust or the like from between the inner seal 5 and the under seal 6 and the side seal 30 is also prevented.

The entire sliding contact surface of the side seal 30 with the guide rail of the lip portion 33 (downward lip 33a and lateral lip 33b) is covered with the protective sheet 7. The protective sheet 7 is formed by forming an adhesive layer on one side of a sheet made of synthetic resin. The protective sheet 7 is detachably bonded to the lip portion 33 by this adhesive layer.
The adhesive layer formed on the protective sheet 7 has a predetermined adhesion performance to the lip portion 33. The predetermined adhesive performance is that when the slider 20 with the side seal 30 fixed at the time of assembly is moved from the temporary shaft to the guide rail 10, the protective sheet 7 does not come off from the lip 33, and the protective sheet 7 is assembled after assembly. When the force which removes is applied, it means the adhesive performance that the protective sheet 7 is easily detached from the lip portion 33.

  In FIG. 3, the thickness of the protective sheet 7 is exaggerated, but the thickness of the protective sheet 7 is suitably 0.05 mm to 0.15 mm. When it is less than 0.05 mm, excessive force is applied to the protective sheet 7 due to the convexity of the step when the rolling element moves through the step existing between the temporary shaft and the guide rail 10, and the protective sheet 7 is damaged. There is a fear. If the thickness of the protective sheet 7 is greater than 0.15 mm, the space in which the rolling element moves becomes too small and the rolling element may not move.

The size of the protective sheet 7 only needs to cover at least the entire sliding contact surface of the lip portion 33 with the guide rail 10. The protective sheet 7 may be any sheet provided with an adhesive having a predetermined adhesion performance on one side such as a synthetic resin film, a metal foil, or a cloth.
Specific examples of the protective sheet 7 include a masking tape and a masking sheet. Specific masking tapes include crepe masking tape, photographic tape, flat paper masking tape, fine line masking tape, polyester masking tape, polyvinyl chloride film masking tape, lead foil masking tape, aluminum foil masking tape, etc. .

Specific examples of the masking sheet include a polypropylene masking sheet, a polyethylene masking sheet, a polyimide masking sheet, a polyester masking sheet, kraft paper, and Japanese paper. Further, the protective sheet 7 made of polyamide is excellent in wear resistance and impact resistance, and therefore is not easily damaged even if it is thin.
In this embodiment, the length of the protective sheet 7 is equal to or longer than the length of the tip line that is in sliding contact with the guide rail 11 of the lip portion 33, and the width H of the protective sheet 7 is the dimension T of the lip portion 33 in the slider moving direction. That's it. Specifically, as shown in FIG. 3, the protective sheet 7 exists in a range from the left side (the slider body side) to the right side from the side seal 30 in the moving direction of the slider 20 from the end surface of the end cap 22. 3 in the up and down direction, and exists below the lateral lip 33b.

Therefore, in this embodiment, the protective sheet 7 allows the entire sliding contact surface of the lip portion 33 of the side seal 30 with the guide rail 10 and the end portions of the lip portions of the inner seal 5 and the under seal 6 that are in contact with the lip portion 33. Is covered.
When the slider 20 is mounted on the guide rail 10 during assembly of the linear motion guide device, first, the end cap 22 and the side seal 30 are attached to the slider body 21, and the cage 4, the inner seal 5, and the under seal 6 are attached to the slider 20. And a rolling element is disposed in the return path and the direction changing path formed in the slider 20 and the cage.

Next, the protective sheet 7 was detachably bonded to the lip portion 33 of the side seal 30, and the lip portion 33 of the side seal 30 and the lip portions of the inner seal 5 and the under seal 6 were covered with the protective sheet 7. Put it in a state. In this state, the slider 20 is set on the temporary shaft.
Next, the end portion of the temporary shaft with the slider 20 still set is abutted against the end portion of the guide rail 10, and the guide rail 10 and the temporary shaft are connected in series. In this state, the slider 20 is moved from the temporary shaft to the guide rail 10. Thereby, the slider 20 can transfer to the guide rail 10 in a state where the rolling element is held in the cage 4.

  At that time, even if there is a step or unevenness between the temporary shaft and the guide rail 10, the protective sheet 7 is attached to the surface of the lip portion 33 of the side seal 30 that becomes the sliding contact surface with the guide rail 10. As a result, it is prevented from being damaged by the steps and irregularities. Similarly, even when an attachment hole is formed on the upper surface of the guide rail 10, the lip portion 33 is prevented from being damaged by the edge of the attachment hole.

  Further, in this embodiment, since the end portions of the lip portions of the inner seal 5 and the under seal 6 that are in contact with the lip portion 33 are also covered with the protective sheet 7, this portion is similarly damaged by a step or unevenness. It is prevented. Therefore, it is possible to prevent the sealing performance between the lip portions of the inner seal 5 and the under seal 6 and the lip portion 33 of the side seal 30 from being deteriorated.

When the linear motion guide device is in operation, if the protective sheet 7 is peeled off from the lip portion 33, the lip portion 33 comes into direct contact with the guide rail 10, so that the sealing function by the lip portion 33 of the side seal 33 is obtained. Moreover, the sealing function by the lip | rip part of the inner seal 5 and the under seal 6 is also obtained.
In this embodiment, as shown in FIG. 3, since a part of the protective sheet 7 protrudes to the outside of the side seal 3 or below the lateral lip 33b, the part is protected by picking that part with the tip of the tool. The sheet 7 can be easily peeled off.

  In this embodiment, the linear motion guide device having the inner seal 5 and the under seal 6 is described. However, the present invention may be applied to a linear motion guide device that does not have at least one of them. it can.

[Second Embodiment]
FIG. 4 is a view showing a linear motion guide device according to a second embodiment of the present invention, and FIG. 5 is an enlarged view of a portion A in FIG.
In this embodiment, the protective sheet 7 is different from that of the first embodiment, but other configurations and operational effects are the same as those of the first embodiment. Therefore, the same reference numerals as in FIGS. 1 to 3 are given to FIGS.

  In the linear motion guide device of the second embodiment, as the protective sheet 7, two sheet pieces divided in the extending direction of the lip portion 33 of the side seal 30 (the direction along the front end line that is in sliding contact with the guide rail 10). 7a is used. One sheet piece 7a of the two sheet pieces 7a covers the left half in FIG. 4 of the lip portion 33, and the other sheet piece 7a covers the right half. Moreover, in the center position of the width direction of the upper surface 10a of the guide rail 10, the end surfaces of both the sheet pieces 7a are abutted and there is no gap between them.

When the protective sheet 7 is peeled from the lip portion 33 in the linear motion guide device of the second embodiment, the sheet pieces 7a are each peeled off. Therefore, the protective sheet 7 of the second embodiment can peel off the protective sheet 7 with a weak force as compared with the protective sheet 7 of the first embodiment, but the number of peeled sheets is doubled.
Whether to use the integral protective sheet 7 as in the first embodiment or the protective sheet 7 composed of the divided sheet pieces 7a as in the second embodiment depends on the ease of peeling work and the sheet piece. The number may be selected according to various conditions of the linear motion guide device in consideration of the number of sheets.

In this embodiment, the protective sheet 7 is composed of two sheet pieces 7a divided into two, but may be divided into three or more.
Also, as shown in FIG. 6, a sheet in which a plurality of protective sheets 7 or sheet pieces 7a are pasted on a mount (preliminary sheet) 8 made of release paper or the like is prepared, and this can be easily taken out near the linear motion guide device. It is good to arrange in the position. Thereby, after removing the slider 20 from the guide rail 10 once, when returning the slider 20 to the guide rail 10 again, the protective sheet 7 can be peeled off from the mount 8 in a nearby position and used.
It should be noted that only the protective sheet 7 may be attached to the mount 8, only the sheet piece 7a may be attached, or both the protective sheet 7 and the sheet piece 7a may be attached. Also good.

[Third Embodiment]
FIG. 7 is a view showing a linear motion guide device according to a third embodiment of the present invention, and FIG. 8 is a side view showing a part thereof. FIG. 9 is a cross-sectional view taken along the line AA of FIG. 7, in which guide rails and rolling elements are omitted. FIG. 10 is a side view showing the protective sheet constituting the linear motion guide device of FIG. 11 is an enlarged view of portion B in FIG. 7, and FIG. 12 is an enlarged view of portion C in FIG.

In this embodiment, a protective sheet 7A having a partially different configuration from that of the protective sheet 7 of the first embodiment is used, but other configurations and operational effects are the same as those of the first embodiment. For this reason, the same reference numerals as in FIGS. 1 to 3 are given to FIGS.
In the linear motion guide device according to the third embodiment, as shown in FIG. 10, a protective sheet 7 </ b> A having a straight cut 71 and a V-shaped cut 72 formed on one surface is used.

  As shown in FIGS. 11 and 12, the tip line that is in sliding contact with the guide rail 10 of the lip portion 33 of the side seal 3 includes a plurality of corner portions 34 a to 34 e corresponding to a cross-sectional shape perpendicular to the longitudinal direction of the guide rail 10. Have. Cuts 71 and 72 are formed at positions corresponding to the corners 34a to 34e. The straight cut 71 is for the corners 34a to 34c, and the V-shaped cut 72 is for the corners 34d to 34e.

  The protective sheet 7 </ b> A is disposed with the surface on which the cuts 71 and 72 are formed facing the lip portion 33. At that time, spaces 37a to 37c are formed at the positions of the corners 34a to 34c by the two surfaces formed by opening the cut 71 and the surfaces forming the corners 34a to 34c. Spaces 37d to 37e are formed at the positions of the corner portions 34d to 34e by the V-shaped cut 72 and the surfaces forming the corner portions 34d to 34e. Since the protective sheet 7A is bent along the corners 34d to 34e, the V-shaped angle of the notch 72 forming the spaces 37d to 37e is smaller than that before the bending.

  The protective sheet 7A is adhered to the surface of the lip portion 33 by a peelable adhesive (having the predetermined adhesive performance described above) disposed in each of the spaces 37a to 37e. That is, the protective sheet 7 </ b> A can be releasably adhered to the surface of the lip portion 33 by attaching a peelable adhesive to the portion where the straight cut 71 is opened and the V-shaped cut 72. The protective sheet 7A shown in FIG. 10 can be peelably bonded to the surface of the lip portion 33 without forming an adhesive layer on one surface.

Note that the protective sheet 7A of this embodiment may also be composed of a plurality of sheet pieces divided by the center line C and the like of FIG. 10 as in the second embodiment.
When a plurality of protective sheets 7A or their sheet pieces are pasted on a mount (preliminary sheet) 8 made of release paper or the like is prepared and placed near the linear motion guide device or at a position where it can be easily removed. Good.

[Fourth Embodiment]
An embodiment of an attachment for a temporary shaft of a linear motion guide device will be described in detail with reference to the drawings.
13 is a perspective view illustrating the configuration of the linear motion guide device, and FIG. 14 is a front view of the linear motion guide device of FIG. 13 as viewed from the longitudinal direction (however, the end cap is omitted). ). In the following drawings, the same or corresponding parts are denoted by the same reference numerals. Furthermore, the terms indicating directions such as up, down, left, right, vertical and horizontal in the following description mean the directions in FIG. 14 for convenience of description unless otherwise specified.

  A slider 2 is assembled on a substantially square guide rail 1 extending in the longitudinal direction so as to be relatively movable in the longitudinal direction of the guide rail. The cross-sectional shape of the slider 2 is substantially U-shaped, and the cross-sectional shape of the inner surface thereof is a shape along the cross-sectional shape of the outer surface of the guide rail 1. Two rolling element raceway surfaces 110 extending in the longitudinal direction are formed on both side surfaces 11a of the guide rail 1, respectively.

The slider 2 is composed of a slider body 2A and end caps 2B that are detachably attached to both ends of the slider moving direction (longitudinal direction of the guide rail). Two rolling element raceway surfaces 111 facing the rolling element raceway surface 110 of the guide rail 1 are formed on the inner side surface of the guide rail 1.
The rolling element raceway surface 110 of the guide rail 1 and the rolling element raceway surfaces 111 of the both sleeve portions 26 form four rolling element rolling paths. These rolling element rolling paths extend in the longitudinal direction. The number of rolling element raceway surfaces 110 and 111 provided in the guide rail 1 and the slider 2 is not limited to two on one side, but may be one on one side or three or more on one side, for example.

Furthermore, the slider 2 is provided with a straight path (not shown) formed of a through hole penetrating in the slider moving direction in parallel with the rolling element rolling path at the upper and lower portions of the left and right sleeve portions 26 of the slider body 2A. .
On the other hand, the end cap 2B is made of, for example, a synthetic resin injection-molded product, and has a substantially U-shaped cross section. The end cap 2B has a semi-doughnut-shaped curved path (not shown) that connects the rolling element rolling path and a straight path parallel to the rolling element rolling path on the left and right sides of the surface (back surface) facing the slider body 2A.

  A rolling element return path that feeds and circulates the rolling element 3 from the end point of the rolling element rolling path to the starting point is constituted by the straight path of the slider body 2A and the curved path of the end cap 2B. The rolling element return path and the rolling element rolling A substantially annular rolling element circulation path is formed by the path. In this rolling element circulation path, a large number of rolling elements 3 made of, for example, steel rollers are arranged to freely roll, and the slider 2 extends along the guide rail 1 through the rolling of the rolling element 3. It is designed to move in the direction.

In FIG. 14, the rolling element 3 is a roller, but the present invention can also be applied to a linear guide device using a ball as the rolling element.
When the slider 2 assembled to the guide rail 1 is moved along the guide rail 1 in the longitudinal direction, the rolling element 3 in the rolling element rolling path turns into the guide rail 1 while rolling in the rolling element rolling path. On the other hand, it moves in the same direction as the slider 2.

  When the rolling element 3 reaches the end point of the rolling element rolling path, the rolling element 3 is scooped up from the rolling element rolling path by the tongue provided in the end cap 2B and sent to the curved path. The rolling element 3 that has entered the curved path makes a U-turn and is introduced into the straight path, and reaches the opposite curved path through the straight path. Here, the U-turn is performed again to return to the starting point of the rolling element rolling path, and the circulation in the rolling element circulation path is repeated infinitely.

  A mounting hole 17 is formed in the guide rail 1 so that such a linear motion guide device can be fixed to an injection molding machine, a machine tool (for example, various grinding machines), a robot or the like with a bolt. If foreign matter such as dust or dust accumulates in the mounting hole 71, the foreign matter adheres to the rolling element raceway surface 111 of the slider 2 when the slider 2 passes above the mounting hole 17, thereby preventing smooth movement of the slider 2. There is a risk of being.

Therefore, for example, a metal or synthetic resin rail cover 18 covers almost the entire upper surface 11 b of the guide rail 1 and closes the upper opening of the mounting hole 17. Then, both end portions 18 a in the width direction of the rail cover 18 are bent downward along the both side surfaces 11 a of the guide rail 1.
Further, when the linear motion guide device is used by being attached to an injection molding machine, a machine tool (for example, various grinding machines), a robot, etc., foreign matter such as dust and dirt is generated on the rolling element raceway surface 110 and other exposed surfaces of the guide rail 1. There is a possibility that the rolling element 3 may accumulate and hinder the rolling of the rolling element 3. Therefore, a dust seal side seal 25 is attached to the end cap 2B.

  That is, the substantially plate-like side seals 25 that are in sliding contact with the outer surfaces (upper surface 11b and both side surfaces 11a) of the guide rail 1 are attached to both ends of the slider 2 in the moving direction (end surfaces in the slider moving direction of the end caps 2B). . Of the opening in the gap between the guide rail 1 and the slider 2, the side seal 25 seals the portion that opens at the end face of the end cap 2 </ b> B in the slider moving direction. The lubricant is prevented from flowing out from the gap.

Furthermore, as shown in FIGS. 14 and 15, the slider body 2A and the end cap 2B are provided with inner seals 5 along the rolling element raceway surfaces 111 on both the left and right sides. That is, the inner seal 5 extending in the longitudinal direction is attached to the inner surface of the slider main body 2A and the end cap 2B so as to follow the rolling element raceway surface 111.
The lip portion 7a of the inner seal 5 is in sliding contact with both end portions 18a in the width direction of the rail cover 18 that is bent downward along the side surface 11a of the guide rail 1. The inner seal 5 prevents foreign matter such as dust and dust that has entered the slider 2 beyond the side seal 25 from entering the rolling element raceway surfaces 110 and 111 from the upper surface 11 b side of the guide rail 1.

  When such a linear motion guide device is assembled by mounting the slider 2 from the longitudinal end portion of the guide rail 1, the rolling element 3 held in the slider 2 falls off the rolling element track surface 111. In order to prevent this, the slider 2 is temporarily assembled to a synthetic resin (or metal) temporary shaft 120 formed in substantially the same shape as the guide rail 1, and the temporary shaft is then assembled as shown in FIG. The slider 120 on the temporary shaft 120 is moved in the axial direction (longitudinal direction) toward the guide rail 1 so as to be transferred onto the guide rail 1.

  Further, when the slider 2 is supplied individually in a state where it is assembled to the temporary shaft 120, the temporary shaft 120 on which the slider 2 is assembled is arranged coaxially and in a straight line with the guide rail 1, so that the temporary shaft The slider 2 on 120 is moved in the axial direction toward the guide rail 1 and transferred onto the guide rail 1. In FIG. 16, the slider 2 on the temporary shaft 120 is omitted.

  Here, the temporary shaft 120 will be described. The temporary shaft 120 is formed in substantially the same shape as the guide rail 1 for the linear motion guide device. That is, the cross-sectional shape when cut along a plane perpendicular to the axial direction of the temporary shaft 120 is substantially the same as that of the guide rail 1. However, unlike the guide rail 1, the temporary shaft 120 is for temporarily assembling the slider 2, and therefore it is sufficient that the length in the axial direction is slightly longer than the length of the slider 2. In addition, since the upper surface of the temporary shaft 120 does not need to be planar in terms of function, a concave meat stealer (not shown) is provided in order to improve the dimensional accuracy of the temporary shaft 120.

  Conventionally, when the slider 2 on the temporary shaft 120 is moved in the axial direction toward the guide rail 1 and transferred onto the guide rail 1, the side seal 25 and the temporary shaft 120 may be damaged. It was. Therefore, in this embodiment, in order to prevent the side seal 25, the inner seal, and the temporary shaft 120 from being damaged, a substantially prismatic temporary shaft attachment 132 as shown in FIGS. 17 and 18 is used. . The cross-sectional shape perpendicular to the axial direction of the temporary shaft attachment 132 is substantially the same as the temporary shaft 120.

  Hereinafter, a method of transferring the slider 2 from the temporary shaft 120 onto the guide rail 1 using the temporary shaft attachment 132 will be described with reference to FIGS. First, the temporary shaft attachment 132 is coaxially and linearly formed at the end portion of the temporary shaft 120 that is disposed opposite to the longitudinal direction end portion of the guide rail 1 among the axial direction (longitudinal direction) both end portions. Attach to. The temporary shaft attachment 132 is preferably detachably attached to the temporary shaft 120, but may be attached so that it cannot be removed.

Hereinafter, the provisional shaft set 134 is referred to as the provisional shaft 120 having the provisional shaft attachment 132 attached thereto.
Next, the temporary shaft set 134 is coaxial with the guide rail 1 while the other axial end of the temporary shaft attachment 132 having one axial end attached to the temporary shaft 120 is opposed to the longitudinal end of the guide rail 1. They are arranged in a straight line (see FIG. 16, except that the temporary shaft 120 in FIG. 16 is replaced with a temporary shaft set 134).

Next, the slider 2 on the temporary shaft 120 is moved in the axial direction toward the guide rail 1 and is transferred onto the guide rail 1. At this time, the temporary shaft set 134 and the guide rail 1 may be disposed in contact with each other, or may be disposed with a slight gap in the axial direction.
In the following, the axial end of the temporary shaft attachment 132 on the side attached to the temporary shaft 120 is the temporary axial side end 41 and the axial end on the side facing the guide rail 1 among the axial ends of the temporary shaft attachment 132. This part is referred to as a rail side end part 42. That is, the temporary shaft attachment 132 is a temporary shaft side end portion 41 that is an axial end portion on the side attached to the temporary shaft 120 and an axial end portion that faces the longitudinal end portion of the guide rail. A rail side end 42 is provided.

The temporary shaft attachment 132 has an overall shape in which the size of the cross section perpendicular to the axial direction increases smoothly from the temporary shaft side end 41 toward the rail side end 42. Further, the size of the cross section of the temporary shaft side end portion 41 of the temporary shaft attachment 132 is substantially the same as the size of the cross section of the axial direction end portion of the temporary shaft 120 (the end portion on the side where the temporary shaft attachment 132 is attached). It is.
Therefore, the size of the cross section of the rail side end portion 42 of the temporary shaft attachment 132 is larger than the size of the cross section of the temporary shaft side end portion 41. The cross sections of the temporary shaft attachment 132 and the temporary shaft 120 mean a cross section perpendicular to the axial direction (a cross section when cut along a plane perpendicular to the axial direction) unless otherwise specified.

In addition, the cross-sectional shape of the temporary shaft side end 41 of the temporary shaft attachment 132 is substantially the same as the cross-sectional shape of the axial end portion of the temporary shaft 120 (the end portion on the side where the temporary shaft attachment 132 is attached). The cross-sectional shape of the rail-side end portion 42 is substantially similar to the cross-sectional shape of the axial end portion of the temporary shaft 120.
In the example of FIG. 17, the cross-sectional size of the central portion 46 between the rail-side end portion 42 and the temporary shaft-side end portion 41 of the temporary shaft attachment 132 is the same as the cross-sectional size of the temporary shaft-side end portion 41. Thus, only the cross-sectional size of the rail-side end portion 42 is larger than the cross-sectional size of the temporary shaft-side end portion 41.

  Further, the rail-side end portion 42 of the temporary shaft attachment 132 includes a core portion 44 and a thin plate-like projecting portion 45 formed to surround the outer periphery of the core portion 44 via a gap. That is, the core portion 44 and the protruding portion 45 constituting the rail side end portion 42 protrude from one axial direction of the central portion 46 of the temporary shaft attachment 132. The outer peripheral surface of the protrusion 45 is continuous with the outer peripheral surface of the central portion 46 of the temporary shaft attachment 132. These outer peripheral surfaces and the outer peripheral surface of the temporary shaft side end 41 constitute the outer peripheral surface of the temporary shaft attachment 132.

  Further, the thin plate-like protruding portion 45 can be elastically deformed inward (that is, toward the core portion 44). Therefore, when a stress is applied to the protrusion 45 from the outside to the inside, the protrusion 45 is elastically deformed so as to bend inward. In FIG. 18, the protrusion 45 on the upper surface side of the temporary shaft attachment 132 is deformed downward, the protrusion 45 on the right side is deformed to the left, and the protrusion 45 on the left side is the right side. Deforms toward the direction. The protrusion 45 is not formed on the bottom side.

  A plurality of slits 47 extending in the axial direction are formed on the left and right surfaces of the protrusion 45 so as to be aligned along the circumferential direction. One end in the axial direction of the slit 47 opens at the end of the protrusion 45. With such a configuration, the protrusion 45 is more easily elastically deformed. The number of slits 47 is not particularly limited, and may be one, but forming a plurality of slits 47 makes it easier to elastically deform.

Since the temporary shaft attachment 132 has the above-described configuration, when the slider 2 on the temporary shaft 120 is transferred onto the guide rail 1, the side seal 25, the inner seal 5, and the temporary shaft 120 are attached to the temporary shaft 120. Damage is prevented from occurring. This point will be described in detail below.
When the slider 2 on the temporary shaft 120 moves toward the guide rail 1 in the axial direction, and the slider 2 reaches the temporary shaft attachment 132, the size of the cross section of the temporary shaft attachment 132 is the temporary shaft side. It smoothly increases from the end 41 toward the rail-side end 42. Therefore, as the slider 2 moves from the temporary shaft side end 41 to the rail side end 42, the side seal 25 and the inner seal 5 gradually move outward (temporary) along the outer peripheral surface of the temporary shaft attachment 132. (In a direction away from the shaft attachment 132).

  In the example of FIG. 17, when the slider 2 moves onto the rail side end portion 42, the side seal 25 and the inner seal 5 are moved outward (temporarily) along the outer peripheral surface (projecting portion 45) of the rail side end portion 42. Begins to expand in the direction away from the shaft attachment 132, and further expands outward along the outer peripheral surface (projecting portion 45) of the rail-side end portion 42 as it approaches the outermost end portion of the rail-side end portion 42. .

  Therefore, when the slider 2 is transferred from the temporary shaft set 134 to the guide rail 1, contact between the side seal 25 and the inner seal 5 and the longitudinal end surface of the guide rail 1 or the end surface of the rail cover 18 is avoided. Therefore, damage to the side seal 25, the inner seal 5, and the rail cover 18 is suppressed, and the slider 2 can be smoothly moved to the guide rail 1.

As can be seen from FIG. 16, a step 130 is formed by the rail cover 18 and the upper surface 1b or the side surface 1a of the guide rail 1 exposed from the rail cover 18, but the "end surface of the rail cover 18" Is an end face of the step 130.
Moreover, since the protrusion 45 of the temporary shaft attachment 132 can be elastically deformed inward, the stress from the side seal 25 and the rolling element 3 can be allowed. That is, even if stress or preload is applied to the temporary shaft attachment 132 from the side seal 25 or the rolling element 3 to which preload is applied, the slider 2 is buffered by elastic deformation of the protrusion 45. The protrusion 45 is hardly damaged when passing over the temporary shaft attachment 132.

Therefore, it is not necessary to use steel as a material for forming the temporary shaft attachment 132, and synthetic resin can be used. Therefore, the temporary shaft attachment 132 can be manufactured easily and at low cost.
As described above, when the temporary shaft attachment 132 is used, damage to the side seal 25, the inner seal 5, and the rail cover 18 can be suppressed when the slider 2 is moved from the temporary shaft 120 to the guide rail 1. . Further, since the temporary shaft 120 can be prevented from being damaged when the slider 2 is moved from the temporary shaft 120 to the guide rail 1, the temporary shaft attachment 132 itself is hardly damaged.

  In addition, this embodiment is an example of aspect 8, for example, the number of the slits 47 formed in the protrusion 45 is not particularly limited, and as shown in FIG. A number of slits 47 may be formed on the right surface. If it does so, since the ease of elastic deformation of the protrusion part 45 becomes higher, the stress from the side seal 25 or the rolling element 3 can be permitted more. As a result, the protrusion 45 is less likely to be damaged when the slider 2 passes over the temporary shaft attachment 132.

  The attachment structure between the temporary shaft attachment 132 and the temporary shaft 120 is not particularly limited, but is preferably a simple structure. For example, as shown in FIGS. 17 and 19, a substantially L-shaped convex portion 51 protruding in the axial direction from the temporary shaft side end portion 41 of the temporary shaft attachment 132 is provided at the axial end portion of the temporary shaft 120. In addition, an attachment structure that fits into the concave portion 52 having a shape corresponding to the convex portion 51 is preferable.

In this case, the temporary shaft 120 is disposed above the temporary shaft attachment 132, the concave portion 52 of the temporary shaft 120 is placed on the convex portion 51 of the temporary shaft attachment 132 from above, and the convex portion 51 and the concave portion 52 are fitted together. The temporary shaft attachment 132 can be attached to the temporary shaft 120.
In addition, the shape of the convex part 51 and the recessed part 52 is not limited to substantially L shape.

  With such a simple structure, the convex portion 51 and the concave portion 52 can be formed by cutting. Further, if the temporary shaft attachment 132 and the temporary shaft 120 are manufactured by injection molding of synthetic resin, the structure of the mold becomes simple, and the manufacturing cost can be kept low. Furthermore, since the structure of the mold is simple, the temporary shaft attachment 132 and the temporary shaft 120, which are molded products, can be molded with high dimensional accuracy.

  Furthermore, in addition to the mounting structure as described above, the temporary shaft attachment 132 and the temporary shaft 120 may be fixed using bolts 61 as shown in FIG. If it attaches with both the said attachment structure and the volt | bolt 61, the attachment 132 for temporary shafts and the temporary shaft 120 can be fixed more firmly. Further, since the provisional shaft attachment 132 is provided with the through hole 62 and the provisional shaft 120 is provided with the internal thread 63, the processing cost does not increase so much, and more firm fixation can be realized at low cost.

  Further, if the length in the axial direction of the temporary shaft attachment 132 is substantially the same as that of the temporary shaft set 134, the temporary shaft attachment 132 itself has the same function as the temporary shaft set 134. 120 is not required. That is, instead of using the temporary shaft set 134 in which the temporary shaft attachment 132 is attached to the temporary shaft 120, the temporary shaft attachment 132 is integrally formed at one end in the axial direction of the temporary shaft 120 (elastic deformation end). A temporary shaft with a part) may be used. An example is shown in FIG.

A temporary shaft (elongated temporary shaft attachment) 135 with an elastic deformation end portion shown in FIG. 22 has a protruding portion 45 that is elastically deformable at one end in the axial direction. When using the temporary shaft 135 with an elastically deformable end, the slider 2 may be assembled to the temporary shaft 135 with an elastically deformable end, and the slider 2 may be transferred from the temporary shaft 135 with an elastically deformable end to the guide rail 1.
By using the temporary shaft 135 with an elastically deformed end, the step of attaching the temporary shaft attachment 132 to the temporary shaft 120 can be omitted, and a coupling structure between the temporary shaft attachment 132 and the temporary shaft 120 is not necessary. Therefore, cost reduction is possible.

[Fifth Embodiment]
An embodiment of the temporary shaft attachment of aspect 11 will be described in detail with reference to the drawings. The feature of the temporary shaft attachment of aspect 11 is that the material is made of an elastic material to prevent damage to the seal tip when the slider is inserted from the temporary shaft into the guide rail. Since the structure other than this characteristic part is almost the same as the structure of a linear motion guide device that has been conventionally known, with reference to FIGS. The description will be omitted or simplified, and the characteristic part will be mainly described.

  In this embodiment, in order to prevent the side seal 25 and the inner seal 5 from being damaged, a substantially prismatic temporary shaft attachment 132A as shown in FIG. Since the provisional shaft 120 has been described in the fourth embodiment, the description thereof is omitted here. The cross-sectional shape perpendicular to the axial direction of the temporary shaft attachment 132A is substantially the same as that of the temporary shaft 120.

  Hereinafter, a method of transferring the slider 2 from the temporary shaft 120 onto the guide rail 1 using the temporary shaft attachment 132A will be described with reference to FIGS. First, the temporary shaft attachment 132A is attached coaxially and in a straight line to the axial end portion of the temporary shaft 120 that faces the axial end portion of the guide rail 1 among the axial end portions. The temporary shaft attachment 132A is preferably detachably attached to the temporary shaft 120, but may be attached so that it cannot be removed.

In the following description, a provisional shaft set 134A is provided with provisional shaft attachment 132A attached to provisional shaft 120.
Next, the temporary shaft set 134A is coaxial and straight with the guide rail 1 while the other axial end of the temporary shaft attachment 132A having one axial end attached to the temporary shaft 120 is opposed to the axial end of the guide rail 1. (See FIG. 25). Then, the slider 2 (not shown) on the temporary shaft 120 is moved in the axial direction toward the guide rail 1 and is transferred onto the guide rail 1. At this time, the temporary shaft set 134A and the guide rail 1 may be arranged in contact with each other, or may be arranged with a slight axial gap.

  In the following description, of the both axial ends of the temporary shaft attachment 132A, the axial end on the side attached to the temporary shaft 120 is the temporary shaft side end 41, and the axial end on the side facing the guide rail 1 Is described as a rail side end portion 42. That is, the temporary shaft attachment 132A is a temporary shaft side end portion 41 that is an axial end portion on the side attached to the temporary shaft 120 and an axial end portion that faces the longitudinal end portion of the guide rail. A rail side end 42 is provided.

  This temporary shaft attachment 132A has an overall shape in which the size of the cross section perpendicular to the axial direction increases smoothly from the temporary shaft side end 41 toward the rail side end 42. In addition, the size of the cross section of the temporary shaft side end 41 of the temporary shaft attachment 132A is substantially the same as the size of the cross section of the axial end portion of the temporary shaft 120 (the end portion on the side where the temporary shaft attachment 132A is attached). ing.

Therefore, the cross-sectional size of the rail-side end portion 42 of the temporary shaft attachment 132A is larger than the cross-sectional size of the temporary shaft-side end portion 41. The cross sections of the temporary shaft attachment 132A and the temporary shaft 120 mean a cross section perpendicular to the axial direction (a cross section when cut along a plane orthogonal to the axial direction) unless otherwise specified.
In addition, the cross-sectional shape of the temporary shaft side end 41 of the temporary shaft attachment 132A is substantially the same as the cross-sectional shape of the axial end portion of the temporary shaft 120 (the end portion on the side where the temporary shaft attachment 132A is attached). The cross-sectional shape of the side end portion 42 is substantially similar to the cross-sectional shape of the end portion in the axial direction of the temporary shaft 120.

In the example of FIG. 24, the size of the cross section of the central portion 46 between the rail-side end portion 42 and the temporary shaft-side end portion 41 of the temporary shaft attachment 132A is equal to the cross-sectional size b of the temporary shaft-side end portion 41. Only the cross-sectional size a of the rail-side end portion 42 is larger than the cross-sectional size b of the temporary shaft-side end portion 41 (a> b).
Furthermore, the rail side end portion 42 of the temporary shaft attachment 132A includes a protruding portion 45 formed of rubber which is an elastic material. That is, the portion of the temporary shaft attachment 132A near the rail-side end portion 42 and having a larger cross-sectional area than the temporary shaft-side end portion 41 is made of rubber (elastic material). Further, the outer peripheral surface of the protrusion 45 is continuous with the outer peripheral surface of the central portion 46 of the temporary shaft attachment 132A.

  Therefore, the rubber protrusion 45 can be elastically deformed inward, and when the protrusion 45 is subjected to stress from the outside inward, the protrusion 45 is inward ( Elastic deformation toward the center). That is, the protrusion 45 on the upper surface side of the temporary shaft attachment 132A is elastically deformed downward, the protrusion 45 on the right side is elastically deformed to the left, and the protrusion 45 on the left side is on the right. It is elastically deformed.

  Usable rubbers include isoprene rubber, butadiene rubber, butyl rubber, nitrile rubber, ethylene propylene rubber, acrylic rubber, chlorosulfonated polyethylene rubber and the like. Among these, butadiene rubber, nitrile rubber, and chlorosulfonated polyethylene rubber are rubbers having excellent wear resistance. Butadiene rubber is a rubber having high impact resilience.

  The rubber protrusion 45 needs to have wear resistance so that the temporary shaft attachment 132A can be used repeatedly. In addition, since it is preferable that the elastic deformation of the protruding portion 45 is eliminated immediately after the slider has passed the protruding portion 45, the protruding portion 45 is preferably formed of rubber having high rebound resilience. Therefore, the protrusion 45 is preferably formed of butadiene rubber.

Since the temporary shaft attachment 132A has the above-described configuration, the side seal 25 and the inner seal 5 are prevented from being damaged when the slider 2 on the temporary shaft 120 is transferred onto the guide rail 1. Is done.
When the slider 2 on the temporary shaft 120 is moved in the axial direction toward the guide rail 1 and the slider 2 reaches the temporary shaft attachment 32, the size of the cross section of the temporary shaft attachment 32 is the end portion on the temporary shaft side. Since the slider 2 gradually increases from 41 toward the rail-side end portion 42, the side seal 25 and the inner seal 5 move to the temporary shaft attachment 132A as the slider 2 moves from the temporary shaft-side end portion 41 to the rail-side end portion 42. Is gradually spread outward (in a direction away from the temporary shaft attachment 132A) without difficulty.

  In the example of FIG. 24, when the slider 2 (not shown) moves onto the rail side end portion 42, the side seal 25 and the inner seal 5 are removed along the outer peripheral surface (projecting portion 45) of the rail side end portion 42. Begins to expand outward (in a direction away from the temporary shaft attachment 132A), and further outwards along the outer peripheral surface (projecting portion 45) of the rail-side end portion 42 as it approaches the outermost end portion of the rail-side end portion 42. To go.

Therefore, when the slider 2 is transferred from the temporary shaft set 134A to the guide rail 1, contact between the side seal 25 and the inner seal 5 and the end surface in the axial direction of the guide rail 1 is avoided, so that the side seal 25 and the inner seal 5 are damaged. Is suppressed, and the slider 2 can be smoothly moved to the guide rail 1.
Moreover, since the protrusion part 45 of the temporary shaft attachment 132A can be elastically deformed inward, the stress from the side seal 25 or the rolling element 3 can be allowed. That is, even if stress or preload is applied to the temporary shaft attachment 132A from the side seal 25 or the rolling element 3 to which preload is applied, the slider 2 is buffered by the elastic deformation of the protrusion 45, so that the slider 2 is The protrusion 45 is not damaged when passing over the attachment 132A. In addition, since the entire protrusion 45 is elastically deformed, a uniform and stable elastic force can be obtained.

Note that the material of the temporary shaft attachment 132A is not limited to rubber, and any material having elasticity may be used. Moreover, only the protrusion 45 can be made of an elastic material, or the entire temporary shaft attachment 132A can be made of an elastic material. If the entire temporary shaft attachment 132A is made of rubber, it can be manufactured easily and at low cost.
Examples of elastic materials other than rubber include thermoplastic elastomers. Examples of the thermoplastic elastomer include polyolefin, polystyrene, polyurethane, polyamide, polyvinyl chloride, and polybutadiene. Among these, since the polybutadiene thermoplastic elastomer has excellent wear resistance and high resilience, the protrusion 45 is preferably made of a polybutadiene thermoplastic elastomer. Thereby, after the slider passes through the protrusion 45, the elastic deformation of the protrusion 45 is eliminated immediately.

  Moreover, the operation | work which attaches a slider incorporating a rolling element to a guide rail from a temporary shaft using a temporary shaft attachment is performed in the use environment of a linear guide device. Therefore, it is preferable to select the elastic material constituting the temporary shaft attachment 132A according to the use environment of the linear motion guide device. If the use environment of the linear motion guide device requires chemical resistance or oil resistance, it is preferable to use a thermoplastic elastomer with excellent chemical resistance or oil resistance, near the peripheral device that generates vibration. If present, it is preferable to use rubber having high vibration absorption.

As described above, when the temporary shaft attachment 132A is used, the side seal 25 and the inner seal 5 can be prevented from being damaged when the slider 2 is moved from the temporary shaft 120 to the guide rail 1. Further, when the slider 2 is moved from the temporary shaft 120 to the guide rail 1, it is possible to prevent the temporary shaft 120 and the temporary shaft attachment 132A from being damaged.
The attachment structure between the temporary shaft attachment 132A and the temporary shaft 120 is not particularly limited, but is preferably a simple structure. For example, as shown in FIG. 23, a substantially L-shaped convex portion 51 protruding in the axial direction from the temporary shaft-side end portion 41 of the temporary shaft attachment 132A is provided at the axial end portion of the temporary shaft 120. An attachment structure that fits into the concave portion 52 having a shape corresponding to the portion 51 is preferable.

In this case, the temporary shaft 120 is disposed above the temporary shaft attachment 132A, the concave portion 52 of the temporary shaft 120 is placed on the convex portion 51 of the temporary shaft attachment 132A from above, and the convex portion 51 and the concave portion 52 are fitted together. The temporary shaft attachment 132A can be attached to the temporary shaft 120.
In addition, the shape of the convex part 51 and the recessed part 52 is not limited to substantially L shape.

With such a simple structure, when the temporary shaft attachment 132A is manufactured, the structure of the mold becomes simple, so that the manufacturing cost can be kept low.
Further, in addition to the mounting structure as described above, the temporary shaft attachment 132B and the temporary shaft 120 may be fixed using bolts 61 as shown in FIG. If it attaches with both the said attachment structure and the volt | bolt 61, the temporary shaft attachment 132B and the temporary shaft 120 can be fixed more firmly. Further, since the provisional shaft attachment 132B is provided with the through hole 62 and the provisional shaft 120 is provided with the internal thread 63, the processing cost does not increase so much, and more firm fixation can be realized at low cost.

In addition, as shown in FIG. 27, a columnar convex portion 53 protruding in the axial direction from the temporary shaft side end portion 41 of the temporary shaft attachment 132C is provided at the axial end portion of the temporary shaft 120. It is good also as an attachment structure fitted to the recessed part 54 of the shape corresponding to.
As shown in FIG. 28, a circumferential groove 53 a is formed at the base end of the convex portion 53, and a small diameter portion 54 a is formed at the opening of the concave portion 54. The diameter A1 of the convex portion 53 is larger than the diameter A2 of the small diameter portion 54a. The diameter A3 of the circumferential groove 53a is slightly smaller than the diameter A2 of the small diameter portion 54a. The dimensional difference between the step formed by the convex portion 53 and the circumferential groove portion 53a and the step formed by the concave portion 54 and the small diameter portion 54a is designed to be within a tolerance range. Further, the convex portion 53 is formed of rubber integrally with the temporary shaft attachment 132C.

With such a structure, the convex portion 53 passes through the small-diameter portion 54a in an elastically deformed state and then enters the concave portion 54, and the circumferential groove portion 53a enters the small-diameter portion 54a. Therefore, the temporary shaft 120 and the temporary shaft attachment 132C are firmly attached. Can be fixed to.
Also in the mounting structure shown in FIG. 23, the temporary shaft 120 and the temporary shaft attachment 132A are made stronger by making the convex portion 51 and the concave portion 52 have the same shape and dimensional relationship as the convex portion 53 and the concave portion 54 described above. Can be fixed.

[Reference numerals of the first to third embodiments]
10 Guide rail 10a Top surface (back) of guide rail
10b Side surface of guide rail 20 Slider 21 Slider body 22 End cap 30 Side seal 33 Lip portion 33a Downward lip 33b Lateral lip 34a to 34e Corner portion of tip line slidably contacting guide rail of lip portion 5 Inner seal 6 Under seal 7 Protection Sheet 7A Protective sheet 7a Sheet piece 71, 72 Notch 8 Mount [reference numerals of the fourth and fifth embodiments]
DESCRIPTION OF SYMBOLS 1 Guide rail 11a Side surface of guide rail 11b Upper surface of guide rail 2 Slider 2A Slider body 2B End cap 3 Rolling body 25 Side seal 26 Sleeve part 5 Inner seal 110 Rolling body raceway surface of guide rail 111 Rolling body raceway surface 120 of slider Temporary Axis 132 Temporary axis attachment 132A Temporary axis attachment 132B Temporary axis attachment 132C Temporary axis attachment 134 Temporary axis set 134A Temporary axis set 41 Temporary axis side end 42 Rail side end 45 Projection 51 Protrusion 52 Concavity 53 Protrusion 54 Concave 61 Bolt 62 Through hole 63 Female thread

Claims (14)

It consists of a guide rail, a slider, and multiple rolling elements.
The guide rail has a rolling element rolling surface extending in the longitudinal direction on the outer surface,
The slider has a rolling element rolling surface formed to face a rolling element rolling surface of the guide rail, and is relatively movable along the longitudinal direction with the guide rail via the rolling element. Straddled with
A side seal having a lip portion slidably contacting the back surface and both side surfaces of the guide rail is attached to an end portion in the moving direction of the slider so as to seal a gap formed between the guide rail and the slider. In the linear motion guide device,
The linear guide device characterized in that the entire sliding surface of the lip portion with the guide rail is covered with a protective sheet, and the protective sheet is adhered to the surface of the lip portion with a peelable adhesive. The tip line of the lip portion in sliding contact with the guide rail has a plurality of corner portions corresponding to a cross-sectional shape perpendicular to the longitudinal direction of the guide rail,
On one side of the protective sheet, cuts are formed at positions corresponding to the plurality of corners,
The protective sheet has a surface on the side where the cut is formed facing the lip portion, and a peelable adhesive disposed in a space formed by the cut and the lip portion is used to remove the lip portion. The linear motion guide device according to claim 1, wherein the linear motion guide device is adhered to a surface.   3. The linear motion guide device according to claim 1, wherein the protective sheet includes a plurality of sheet pieces that are divided in a direction along a front end line that is in sliding contact with the guide rail of the lip portion. The guide rail includes a guide rail, a slider, and a plurality of rolling elements. The guide rail has a rolling element rolling surface extending in a longitudinal direction on an outer surface, and the slider faces the rolling element rolling surface of the guide rail. A side seal having a rolling element rolling surface formed in such a manner as to be slidably contacted with the back surface and both side surfaces of the guide rail. The guide rail of the lip portion of the linear motion guide device is attached to the end of the slider in the moving direction so as to seal a gap formed between the guide rail and the slider. A protective sheet for protecting the sliding surface of
A protective sheet for a side seal lip portion, wherein the lip portion has a length that is not less than a length of a tip line that is in sliding contact with the guide rail and a width that is not less than a dimension of the lip portion in the moving direction.   The protective sheet of Claim 4 which has the adhesive agent peelable with respect to the said lip | rip part on one surface. The tip line of the lip portion in sliding contact with the guide rail has a plurality of corner portions corresponding to a cross-sectional shape perpendicular to the longitudinal direction of the guide rail,
The protective sheet according to claim 4, wherein cuts are formed at positions corresponding to the plurality of corners on one surface.   The protective sheet according to any one of claims 4 to 6, comprising a plurality of sheet pieces divided in a direction along a tip line that is in sliding contact with the guide rail of the lip portion. When moving the slider assembled to the temporary shaft in the axial direction of the temporary shaft and transferring the slider from the temporary shaft to a guide rail that constitutes a linear motion guide device together with the slider, It is used by being attached to the axial direction end portion arranged on the guide rail side among the axial direction both ends so as to be coaxial with the temporary shaft and in a linear arrangement,
The cross-sectional shape perpendicular to the axial direction is substantially the same as the temporary shaft, and the temporary shaft side end that is the axial end on the side attached to the temporary shaft, and the side facing the longitudinal end of the guide rail An attachment for a temporary shaft having a rail side end that is an axial end of
The cross-sectional size perpendicular to the axial direction has an overall shape that increases smoothly from the temporary shaft side end toward the rail side end,
The cross-sectional size of the temporary shaft side end portion is substantially the same as the cross-sectional size of the axial end portion of the temporary shaft to be attached, and the cross-sectional size of the rail side end portion is the temporary shaft side end portion. Larger than the size of the cross section of the part,
An attachment for a temporary shaft of a linear motion guide device, wherein an outer peripheral surface of the rail side end portion is elastically deformable inward.   The rail side end portion has a plate-like protruding portion protruding in the axial direction, the protruding portion forms the outer peripheral surface, and slits extending in the axial direction are formed on both side surfaces of the protruding portion. The temporary shaft attachment according to claim 8.   The temporary shaft attachment according to claim 8, wherein a slit extending in an axial direction is formed on an upper surface of the protruding portion.   The temporary shaft attachment according to claim 8, wherein at least the rail side end portion is made of an elastic material.   The temporary shaft attachment according to claim 9, wherein the elastic material is rubber.   The temporary shaft attachment according to claim 9, wherein the elastic material is a thermoplastic elastomer. A guide rail,
A temporary shaft to which the temporary shaft attachment according to any one of claims 9 to 13 is attached and a slider in which a rolling element is assembled is assembled,
A linear motion guide device comprising:

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