JP2015117733A - Temporary shaft for linear motion guide device and linear motion guide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temporary shaft of a linear motion guide device which can obtain an effect for preventing the damage of a side seal, and can be easily and stably connected to a guide rail.SOLUTION: A temporary shaft for a guide rail 2 has an inclined part 20 at an end part in a longitudinal direction. The inclined part 20 has inclined faces 20a, 20b which become small in dimensions as separating from faces with the upper face 22 and both the side faces 21 of the guide rail 2 as starting points. A recess 10 which the inclined part 20 enters is formed at an end face of the temporary shaft 1. The recess 10 has sidewalls of the inclined faces 10a, 10b with an upper face 12 and both side faces 11 of the temporary shaft 1 as starting points. A lower face 10d of the recess 10 is opened.

Description

  The present invention has a provisional shaft of a linear motion guide device, that is, a cross-sectional shape that matches the cross sectional shape perpendicular to the longitudinal direction of the guide rail that constitutes the linear motion guide device, and is arranged at the longitudinal end of the guide rail. It is related with the temporary axis used.

  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 slider is disposed outside the guide rail. Each of the guide rail and the slider has a raceway surface that forms a rolling passage of the rolling element at a position facing each other. Both raceway surfaces extend in the longitudinal direction of the guide rail. The rolling element is disposed in the rolling passage. The slider linearly moves along the guide rail via a rolling element that rolls in a rolling state in the rolling passage.

  In such a linear motion guide device, if foreign matter such as dust, dust, chips and chips enters from the gap between the guide rail and the slider and adheres to the raceway surface, smooth rolling of the rolling element is hindered. For this reason, by attaching a side seal or an inner seal to the slider, entry of foreign matter into the slider is prevented. The side seal and the inner seal have a lip portion that is in sliding contact with the guide rail. The lip portion of the side seal or inner seal is formed of a relatively fragile material such as rubber in order to ensure sealing performance.

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 having a side seal and an inner seal already mounted and incorporating a rolling element is attached to the temporary shaft. The conventional temporary shaft has the same cross-sectional shape as the cross-sectional shape perpendicular to the longitudinal direction of the guide rail, and the raceway surface of the temporary shaft is formed with lower surface accuracy than the raceway surface of the guide rail. Moreover, the conventional temporary shaft is formed shorter than the guide rail, and both axial end surfaces of the temporary shaft are flat surfaces.

  Next, the slider is moved from the temporary shaft to the guide rail in a state where the temporary shaft is arranged at the longitudinal end portion of the guide rail and the end surface of the temporary shaft is in contact with the end surface of the guide rail. An inclined portion composed of a chamfered portion (45 ° inclined surface) or a tapered portion (an inclined surface looser than the chamfer) is formed at the longitudinal end portion of the guide rail. This inclined portion starts from the upper surface and both side surfaces of the guide rail, and has an inclined surface (45 ° inclined surface in the chamfered portion and inclined surface looser than 45 ° in the tapered portion) that decreases in size as the distance from these surfaces increases. Have.

As described above, in the case of the conventional temporary shaft, when the end surface of the temporary shaft is brought into contact with the end surface of the guide rail, a step is generated between the inclined portion of the longitudinal end portion of the guide rail and the temporary shaft. When the slider is moved, the lip portion of the side seal or inner seal may be damaged. Conventionally, provisional shafts aimed at solving this problem have been proposed.
For example, Patent Document 1 describes a temporary shaft for a linear motion guide device in which an upper surface of a guide rail is covered with a rail cover. Specifically, the thin protrusion projecting so as to abut against the width direction end of the rail cover that covers the guide rail is the end of the temporary shaft in the axial direction (the direction aligned with the longitudinal direction of the guide rail). Provided.

With such a configuration, when the slider on the temporary shaft moves to the guide rail, the inner seal rides on the protrusion of the temporary shaft, thereby preventing the inner seal from interfering with the rail cover. Further, the temporary shaft of Patent Document 1 is formed with a support portion for positioning the temporary shaft so as to sandwich the side surface of the guide rail from both sides on the side surface of the lower end of the temporary shaft.
In Patent Document 2, the cross-sectional outline at the axial center is substantially the same as the cross-sectional outline in the longitudinal direction of the guide rail, and the cross-sectional outline at one end in the axial direction is larger than the cross-sectional outline in the longitudinal direction of the guide rail. Axes are listed. As an example of this temporary shaft, an axial end portion having a thin plate-like projecting portion along the entire outer periphery of the temporary shaft is described.

  This temporary shaft is used by inserting the longitudinal end portion of the guide rail into the thin plate-like overhanging portion. Then, when the slider moves from the temporary shaft to the guide rail, the lip portion of the side seal is pushed and spread by the overhanging portion. As a result, the slider can be moved from the temporary shaft to the guide rail without damaging the side seal.

JP 2008-57690 A JP 2008-82504 A

Since the temporary shaft described in Patent Document 1 is positioned by sandwiching the side surface of the guide rail from both sides, the support portion may be broken by an impact. Further, this temporary shaft cannot be expected to prevent the side seal from being damaged.
When using the temporary shaft having the projecting portion described in Patent Document 2, one end in the longitudinal direction of the guide rail is lifted and inserted into the thin plate-shaped projecting portion. For this reason, the connection state between the guide rail and the temporary shaft becomes unstable unless a device such as a spacer corresponding to the thickness of the protruding portion is provided on the lower surface of the guide rail.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a temporary shaft for a linear motion guide device that has an effect of preventing damage to a side seal and can be easily and stably coupled to a guide rail.

In order to solve the above-described problems, an aspect of the present invention has a cross-sectional shape that matches a cross-sectional shape perpendicular to the longitudinal direction of the guide rail that constitutes the linear motion guide device, and is provided at a longitudinal end portion of the guide rail. A temporary shaft that is used by being arranged, and has the following configurations (a) and (b).
(a) An inclined portion is formed at an end portion in the longitudinal direction of the guide rail, and the inclined portion includes an inclined surface that starts from the upper surface and both side surfaces of the guide rail and decreases in size as the distance from these surfaces increases.

(b) A concave portion into which the inclined portion enters is formed on the end surface in the axial direction, and the concave portion has a sidewall of an inclined surface starting from the upper surface and both side surfaces, and the lower surface is open.
The temporary shaft of this aspect is used by inserting the inclined portion of the guide rail into the recess. At that time, when the starting point of the inclined surface of the inclined portion is brought into contact with the starting point of the inclined surface of the side wall of the temporary shaft, the upper surface and both side surfaces of the guide rail and the upper surface and both side surfaces of the temporary shaft are continuous without a gap, There is no step between the temporary shaft and the guide rail.

Even when both starting points are not in contact, the guide rail and guide are compared with the temporary shaft that is used with the axial end surface in contact with the longitudinal end surface of the guide rail by using the inclined portion of the guide rail in the recess. The level difference between the rails becomes smaller.
Therefore, according to the temporary shaft of this aspect, the side seal is damaged due to the step between the temporary shaft and the guide rail as compared with the temporary shaft that is used with the axial end surface being in contact with the longitudinal end surface of the guide rail. It is suppressed.
Moreover, according to the temporary shaft of this aspect, since the lower surface of the said recessed part is open | released, compared with the temporary shaft which has the overhang | projection part described in patent document 2, it can couple | bond with a guide rail easily and stably. .
The temporary shaft of this aspect preferably has the following configuration (c).

(c) The axial dimension of the recess is equal to or greater than the longitudinal dimension of the guide rail of the inclined portion, and the inclined surface of the inclined portion and the inclined surface of the side wall are the same.
When the temporary shaft of this aspect has the configuration (c), by bringing the inclined surface of the inclined portion into contact with the entire inclined surface of the side wall of the recess, the starting point of the inclined surface of the inclined portion and the temporary shaft The starting point of the inclined surface of the side wall comes into contact, and the upper surface and both side surfaces of the guide rail and the upper surface and both side surfaces of the temporary shaft are continuous without a gap. Thereby, a level | step difference does not arise between a temporary shaft and a guide rail.
Further, when the temporary shaft of this aspect has the configuration (c), the temporary shaft and the guide rail are stably coupled by contact between the same inclined surfaces as compared to the case without the configuration (c). It becomes a state.
The temporary shaft of this aspect can have any of the following configurations (d) to (f).

(d) The axial end portion in which the concave portion is formed has an inclined portion, and the inclined portion has an inclined surface starting from the upper surface and both side surfaces and having a size that decreases as the distance from these surfaces increases.
(e) The concave portion is provided at both ends in the longitudinal direction.
(f) a main body, and an attachment having the concave portion and detachably attached to one end of the main body.
Another aspect of the present invention is a linear motion guide device having a guide rail and a temporary shaft on which a slider incorporating a rolling element is assembled, wherein the temporary shaft is a temporary shaft of this aspect. Features.

  The temporary shaft of the present invention has an effect of preventing damage to the side seal during use, and can be easily and stably coupled to the guide rail.

It is a top view which shows the temporary shaft and guide rail of 1st Embodiment. It is a side view which shows the temporary shaft and guide rail of 1st Embodiment. It is a figure which shows the axial direction end surface in which the recessed part of the temporary shaft of 1st Embodiment is formed. It is an enlarged view of the part with which the guide rail and temporary axis | shaft of 1st Embodiment are couple | bonded, Comprising: A temporary axis | shaft is XX sectional drawing of FIG. 1, and a guide rail is shown with a side view. It is a top view which shows an example of the use condition of the temporary shaft of 1st Embodiment. It is a partial side view which shows an example of the use condition of the temporary shaft of 1st Embodiment. It is a top view which shows the temporary shaft and guide rail of 2nd Embodiment. It is a top view which shows the temporary shaft and guide rail of 3rd Embodiment. It is an expanded side view of the part with which the guide rail and temporary axis | shaft of 3rd Embodiment are couple | bonded. It is a partial side view which shows the use condition of the temporary shaft of 3rd Embodiment. It is the top view (a) which shows the provisional axis of 4th Embodiment, the plane sectional view (b) which shows the state from which the main body and the attachment were isolate | separated, and side sectional drawing (c).

Embodiments of the present invention will be described below, but the present invention is not limited to these embodiments.
[First Embodiment]
The temporary shaft of 1st Embodiment is demonstrated using FIGS.
The temporary shaft 1 according to the first embodiment is a temporary shaft for a linear motion guide device having a roller as a rolling element and having two to four rows of rolling paths.

  As shown in FIG. 2, two rows of raceway surfaces 21a and 21b are formed on both side surfaces 21 of the guide rail 2 constituting the linear motion guide device. As shown in FIGS. 1 and 2, the guide rail 2 has a mounting hole 24 penetrating from the upper surface 22 to the lower surface 23. An inclined portion 20 is formed at one end in the longitudinal direction of the guide rail 2. The inclined portion 20 has inclined surfaces 20a and 20b starting from the upper surface 22 and both side surfaces 21 of the guide rail and having dimensions that become smaller as the distance from these surfaces increases.

  The temporary shaft 1 has the same side surface 11 as each side surface 22 of the guide rail 2 and the same upper surface 12 as the upper surface 22 of the guide rail 2. On both side surfaces of the temporary shaft 1, raceway surfaces 11a and 11b having the same shape as the raceway surfaces 21a and 21b of the guide rail 2 but having low surface accuracy are formed. That is, the temporary shaft 1 has the same cross-sectional shape as the cross-sectional shape perpendicular to the longitudinal direction of the guide rail 2. A recess 10 is formed on one axial end surface of the temporary shaft 1, and no recess is formed on the other end surface.

  The temporary shaft 1 is made of metal, a pair of side plates 110 that form the side surfaces 11, an upper plate 120 that forms the upper surface 12, an end plate 100 that closes one end in the axial direction near the recess 10, and an end portion An intermediate plate 101 having the same shape as the plate 100 and an end plate 130 that closes the other end in the axial direction are integrated. The intermediate plate 101 may be fixed at a plurality of positions in the axial direction. In particular, when the temporary shaft 1 is long, the intermediate plate 101 is fixed at a plurality of positions in the axial direction, so that the shape retaining property of the temporary shaft 1 is improved.

  As shown in FIGS. 3 and 4, the recess 10 of the temporary shaft 1 includes a side wall 10 a made of an inclined surface starting from the upper surface 12, a pair of side walls 10 b made of inclined surfaces starting from both side surfaces 11, and a bottom surface 10c. The lower surface 10d of the recess 10 that is continuous with the lower surface 13 of the temporary shaft 1 is open. The side wall 10a is formed at one end of the upper plate 120 in the longitudinal direction (axial direction of the temporary shaft). The pair of side walls 10 b is formed at one end in the longitudinal direction of the pair of side plates 110. The bottom surface 10 c is one surface of the end plate 100.

The axial dimension of the recess 10 of the temporary shaft 1 is the same as the longitudinal dimension of the guide rail 2 of the inclined portion 20. The inclined surface 20a starting from the upper surface 22 of the inclined portion 20 and the inclined surface (side wall) 10a starting from the upper surface 12 of the temporary shaft 1 are the same. The inclined surface 20b starting from the side surface 21 of the inclined portion 20 and the inclined surface (side wall) 10b starting from the side surface 11 of the temporary shaft 1 are the same.
The temporary shaft 1 is used with the inclined portion 20 of the guide rail 2 placed in the recess 10. At that time, by bringing the tip surface of the inclined portion 20 into contact with the bottom surface 10 c of the recess 20, the entire inclined portion 20 enters the recess 10, and the inclined surfaces 20 a and 20 b of the inclined portion 20 are inclined surfaces 10 a and 10 b of the recess 10. And contact each other. As a result, the starting points of the inclined surfaces 20a, 20b of the inclined portion 20 and the starting points of the inclined surfaces 10a, 10b of the recess 10 come into contact with each other, and as shown in FIG. 1 upper surface 12 and both side surfaces 11 are continuous without a gap. Therefore, there is no step between the temporary shaft 1 and the guide rail 2.

Further, when the temporary shaft 1 has the inclined portion 20 of the guide rail 2 placed in the concave portion 10 and the starting points of the inclined surfaces 20a and 20b of the inclined portion 20 do not contact the starting points of the inclined surfaces 10a and 10b of the concave portion 10, FIG. As shown in FIG. 6, a recess 4 formed by the inclined surfaces 20 a and 20 b of the inclined portion 20 and the end surface of the temporary shaft 1 exists between the temporary shaft 1 and the guide rail 2.
Even in that case, the provisional shaft 1 of this embodiment is smaller than the provisional shaft without the recessed portion 10 because the recessed portion 4 becomes smaller by the amount of the inclined portion 20 of the guide rail 2 entering the recessed portion 10. The level difference with the rail 2 becomes small. Further, when the slider is moved from the temporary shaft 1 to the guide rail 2, the slider that has left the temporary shaft 1 first hits the inclined surfaces 20a and 20b of the guide rail 2, so that the guide rail 2 does not have the inclined portion 20. Compared to the case, the side seal is less likely to be damaged.

  Therefore, according to the temporary shaft 1 of this embodiment, compared to the temporary shaft used by contacting the axial end surface with the longitudinal end surface of the guide rail 2, the temporary shaft 1 is caused by the step between the temporary shaft 1 and the guide rail 2. Side seal damage is suppressed. Further, since the lower surface 10d of the recess 10 is open, it can be easily and stably coupled to the guide rail 2 as compared with the temporary shaft having the overhang portion described in Patent Document 2.

[Second Embodiment]
As shown in FIG. 7, the temporary shaft 1 </ b> A of this embodiment has recesses 10 formed on both end surfaces in the axial direction. Other points are the same as those of the temporary shaft 1 of the first embodiment.
If the same concave portion 10 is formed on both axial end surfaces of the temporary shaft 1A, the lifetime is longer than that of the temporary shaft 1 of the first embodiment in which the concave portion 10 is formed only at one axial end portion.
If different concave portions 10 are formed on the end surfaces in the axial direction of the temporary shaft 1A, the inclined portions 20 can correspond to two different guide rails 2.

[Third Embodiment]
As shown in FIG. 8, the temporary shaft 1 </ b> B of this embodiment has an inclined portion 30 at one axial end where the recess 10 is formed. Other points are the same as those of the temporary shaft 1 of the first embodiment.
As shown in FIG. 9, the inclined portion 30 has inclined surfaces 30 a and 30 b that start from the upper surface 12 and both side surfaces 11 and have dimensions that decrease as the distance from these surfaces increases. The recess 10 has a side wall 10a made of an inclined surface starting from the upper surface 12, a pair of side walls 10b made of an inclined surface starting from both side surfaces 11, and a bottom surface 10c, and the lower surface 10d is open.

The axial dimension of the inclined portion 30 is smaller than the axial dimension of the recess 10. The inclined surfaces 30 a and 30 b of the inclined portion 30 are gentler than the inclined surfaces 20 a and 20 b of the inclined portion 20 of the guide rail 2.
The temporary shaft 1B is used by putting the inclined portion 20 of the guide rail 2 in the recess 10. As shown in FIG. 10, the inclined portion 20 of the guide rail 2 enters the recess 10 to a position where it contacts the inclined portion 30 of the temporary shaft 1 </ b> B. In the state of FIG. 10, the provisional shaft 1 </ b> B is such that the tip surface of the inclined portion 20 does not contact the bottom surface 10 c of the recessed portion 10, and the inclined surfaces 20 a and 20 b of the inclined portion 20 do not contact the inclined surfaces 10 a and 10 b of the recessed portion 10. .

  In this state, a V-shaped recess 4B formed by the inclined surfaces 30a and 30b and the inclined surfaces 20a and 20b of the inclined portion 20 exists between the guide rail 2 and the temporary shaft 1B. The concave portion 4B is smaller than the case where a temporary shaft without the concave portion 10 is used, by an amount corresponding to the inclined portion 20 of the guide rail 2 entering the concave portion 10. Therefore, the provisional shaft 1B of this embodiment has a smaller level difference between the provisional shaft 1B and the guide rail 2 than the provisional shaft without the recess 10.

Further, when the slider is returned from the guide rail 2 to the temporary shaft 1, the slider that has exited the guide rail 2 first hits the inclined surfaces 30a and 30b of the temporary shaft 1B. Therefore, when the slider is returned from the guide rail 2 to the temporary shaft 1B as compared with the case where the temporary shaft 1 of the first embodiment without the inclined portion 30 is used in the state shown in FIG. Damage is unlikely to occur.
Therefore, according to the temporary shaft 1B of this embodiment, compared to the temporary shaft used by contacting the axial end surface with the longitudinal end surface of the guide rail 2, it is caused by the step between the temporary shaft 1B and the guide rail 2. Side seal damage is suppressed. Further, since the lower surface 10d of the recess 10 is open, it can be easily and stably coupled to the guide rail 2 as compared with the temporary shaft having the overhang portion described in Patent Document 2. Further, since the concave portion formed between the guide rail 2 and the guide rail 2 is V-shaped, the side seal can be prevented from being damaged even when the slider is returned from the guide rail 2 to the temporary shaft 1B.

[Fourth Embodiment]
As shown in FIG. 11, the temporary shaft 5 of this embodiment includes a main body 51 and an attachment 52. Protrusions 51 a are formed at two locations on one end surface in the axial direction of the main body 51. A concave portion 50 into which all the inclined portions 20 of the guide rail 2 enter is formed at one end in the axial direction of the attachment 52. At the other end in the axial direction of the attachment 52, a recess 52a into which the protrusion 51a of the main body 51 is detachably fitted is formed.

The concave portion 50 of the attachment 52 has a side wall 50a formed of an inclined surface starting from the upper surface 522 of the attachment 52, a pair of side walls 50b formed of inclined surfaces starting from both side surfaces 521 of the attachment 52, and a bottom surface 50c. The lower surface 50d of the recess 50 that is continuous with the lower surface 523 of the attachment 52 is open.
The axial dimension of the concave portion 50 of the attachment 52 is the same as the longitudinal dimension of the guide rail 2 of the inclined portion 20. Further, the inclined surface 20a starting from the upper surface 22 of the inclined portion 20 and the inclined surface (side wall) 50a starting from the upper surface 522 of the attachment 52 are the same. The inclined surface 20b starting from the side surface 21 of the inclined portion 20 and the inclined surface (side wall) 50b starting from the side surface 521 of the attachment 52 are the same.

  The main body 51 is made of metal, and includes a closing plate 510 that closes one end in the axial direction, a pair of side plates 511a that form side surfaces 511, an upper plate 512a that forms an upper surface 512, and a lower plate 513a that forms a lower surface 513. The end plate 514 closing the other end in the axial direction and the intermediate plate 515 having the same shape as the end plate 514 are integrated. A protrusion 51 a is provided on the closing plate 510. The intermediate plate 515 may be fixed at a plurality of locations in the axial direction.

The attachment 52 is formed by machining the recess 50 and the recess 52a in a metal rectangular parallelepiped.
The provisional shaft 5 of this embodiment is provided with a plurality of attachments 52 each having a recess 50 matched to a plurality of different inclined portions 20, and the attachment 52 having a recess 50 according to the inclined portion 20 of the target guide rail 2. Is attached to the main body 51 for use. That is, by preparing one main body 51 and a plurality of attachments 52, it is possible to deal with a plurality of guide rails 2 having different inclined portions 20.

  In order to prevent the side seal from being damaged at the coupling position between the main body 51 and the attachment 52, the coupling between the main body 51 and the attachment 52 is combined with the coupling between the inclined portion 20 of the guide rail 2 and the concave portion 50 of the temporary shaft 5. It is preferable to carry out similarly. For this purpose, for example, the two protrusions 51a of the main body 51 are changed to inclined protrusions similar to the inclined part 20 of the guide rail 2, and the two concave parts 52a of the attachment 52 are replaced with the inclined protrusions of the main body 51. Change to a recessed part that fits.

In each embodiment, since the temporary shaft is made of metal, the inclined surface of the recess is formed with high accuracy, but the temporary shaft may be made of synthetic resin. Further, if the temporary shaft is made of the same material as that of the guide rail, resonance can be prevented from occurring at the fitting portion between the inclined portion of the guide rail and the concave portion of the temporary shaft during use.
In addition, when the inclined surfaces of the inclined portion of the guide rail and the concave portion of the temporary shaft are brought into contact with each other, the guide rail and the temporary shaft are applied by applying lubricating oil to one inclined surface and bringing it into contact with the other inclined surface. Can be firmly bonded.

DESCRIPTION OF SYMBOLS 1 Temporary shaft 1A Temporary shaft 1B Temporary shaft 10 Recessed part 10a Side wall starting from the upper surface of the recessed part 10b Side wall starting from the side surface of the recessed part 10c Bottom surface of the recessed part 10d Lower surface of the recessed part 11 Side surface of the temporary axis 12 Upper surface of the temporary axis 13 Temporary axis The lower surface of the guide rail 20 The inclined portion 20a of the guide rail 20a The inclined surface 20b starting from the upper surface of the guide rail 21b The inclined surface starting from the side surface of the guide rail 21 The side surfaces 21a and 21b of the guide rail 22 The track surface of the guide rail 22 Upper surface 23 Lower surface of guide rail 24 Mounting hole 30 Inclined portion of temporary shaft 30a Inclined surface inclined surface starting from upper surface of temporary shaft 30b Inclined surface starting from side surface of temporary shaft 4 Recessed portion between guide rail and temporary shaft 4B Recessed portion between guide rail and temporary shaft 5 Temporary shaft 50 Recessed portion 50a Side wall starting from upper surface of recessed portion 50b Side wall starting from side surface of recessed portion 50c Concave Bottom 50d lower surface 51 the lower surface of the upper surface 523 attachment side 522 attachment recess 521 attachment of the attachment 52a attachment projections 52 temporary shaft body 51a main body of the temporary axis of the recesses of

Claims (6)

A temporary shaft that is produced by matching the shape and size of the guide rail of the linear guide device and is used by being arranged at the longitudinal end of the guide rail,
An inclined portion is formed at a longitudinal end portion of the guide rail, and the inclined portion has an inclined surface starting from the upper surface and both side surfaces of the guide rail, and having a size that decreases as the distance from these surfaces increases.
A concave portion into which the inclined portion enters is formed on an end surface in the axial direction, the concave portion has a side wall of an inclined surface starting from the upper surface and both side surfaces, and the lower surface is open. Temporary axis.   The temporary shaft of the linear motion guide device according to claim 1, wherein the axial dimension of the concave portion is equal to or greater than the longitudinal dimension of the guide rail of the inclined portion, and the inclined surface of the inclined portion and the inclined surface of the side wall are the same.   The axial end portion in which the concave portion is formed has an inclined portion, and the inclined portion is formed of an inclined surface starting from an upper surface and both side surfaces and having a size that decreases as the distance from these surfaces increases. Temporary shaft of the linear motion guide device described.   The temporary shaft of the linear guide apparatus as described in any one of Claims 1-3 which have the said recessed part in a longitudinal direction both ends.   The temporary shaft of the linear motion guide device according to any one of claims 1 to 4, further comprising a main body and an attachment having the concave portion and detachably attached to one end of the main body. A guide rail,
A temporary shaft on which a slider incorporating rolling elements is assembled;
Have
The linear motion guide device, wherein the temporary shaft is the temporary shaft according to any one of claims 1 to 5.

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