JPH1172119A - Linear motion guide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a resin-made circulation path constitutional part as a separate unit constitution from a moving member main unit, attain facilitation of molding, while ensuring continuity as well as possible in a connection part of the fellow circulation path constitutional parts, and make assembly possible relating to the moving member main unit. SOLUTION: A continued resin circulation path molded unit 20, having a pair of load ball passage constitutional parts 21, 21 extended along both side edges of a load ball rolling groove 8, relief passage constitutional part 23 constituting a ball relief passage, and a pair of direction change path internal periphery guide constitutional part 22 constituting an internal periphery guide part 10a of a direction change path, is molded in a separate unit from a moving member main unit 13. The resin circulation path molded unit 20 is divided into a plurality of parts able to be assembled relating to the moving block main unit 13, in a condition that of four constitutional parts four connection parts constituting the resin circulation path molded unit 20, at least one connection part is integrally molded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear motion guide device in which a resin-made passage constituting member is incorporated in a moving member main body.

[0002]

2. Description of the Related Art Applicants have already disclosed a load ball passage structure, a ball escape passage, and an inner circumference guide structure for a ball escape passage extending along both side edges of a ball rolling groove in a load area of a moving block of a linear motion guide device. (Japanese Patent Application Laid-Open No. 7-31).
No. 7762).

In other words, a block body is inserted into a mold during resin molding, and a load ball passage forming section, a direction changing path inner circumferential guide section or a ball escape path forming section is inserted into a block body with reference to a ball rolling groove. It was integrally molded.

[0004]

However, in the conventional integrally molded moving block, if the block body is positioned in the mold, a large mold is required if the block body is large. . Although it is sufficient to make a large mold, it is difficult to produce the mold, and the size is practically restricted. In particular, since the load ball passage constituting portion on the groove side edge of the ball rolling groove extending in the longitudinal direction of the block body is thin and long, the resin does not easily turn during molding.

[0005] In order to allow the resin to flow around such a thin portion, the number of gates may be increased as necessary. However, when the block body is inserted into a mold,
The block body gets in the way and the running of the water gets worse.

The moving block has a pair of sleeves sandwiching the left and right side surfaces of the track rail, and balls are provided between the left and right side surfaces of the track rail and the inner side surfaces of the left and right sleeve portions of the moving block in a total of four rows, two rows each in the vertical direction. In such a case, the block main body is in the way and the hot water flow in the width direction is also poor.

[0007] An object of the present invention is to facilitate molding by forming a resin circulation path constituting part separately from a moving member main body.
Another object of the present invention is to make it possible to incorporate the components into the moving member main body while ensuring the continuity of the connecting portions of the circulation path components.

[0008]

Means for Solving the Problems To achieve the above object, the present invention is configured as follows.

That is, a track member provided with a rolling element rolling portion, and a moving member movably provided along a plurality of rolling elements along the track member are provided. A rolling element rolling section corresponding to the rolling element rolling section of the track member; a rolling element escape passage provided in parallel with the rolling element rolling section at a predetermined interval; and the rolling element rolling section and the rolling element A pair of direction change paths for connecting the escape passages and circulating the rolling elements, and a pair of load rolling element passages extending along both side edges of the load rolling element rolling portion in the linear motion guide device. A continuous resin circulation path molded body including a part, an escape path forming part forming the escape path, and a pair of direction changing path inner circumference guiding parts forming an inner circumference guiding part of the direction changing path. It is molded separately from the member body, and the resin circulation path molded body is In a state in which at least one of the four connecting parts between the four constituent parts constituting the road forming body is integrally formed, the connecting part is divided into a plurality of parts so as to be incorporated into the moving member main body. It is characterized by.

There are three modes of continuity of the connecting portion of the molded resin circuit, for example, as follows.

The load rolling element passage component and the pair of direction change path inner circumference guiding components are integrated, and the escape passage component is separate.

The load rolling element passage forming section, the relief passage forming section, and one of the direction changing path inner peripheral guide forming sections are integrated, and the other direction changing path inner peripheral guide forming section is formed separately.

The load rolling element passage forming part and the relief path forming part are integrated with the pair of direction change path inner peripheral guiding parts, and the load rolling element passage forming part and the relief path forming part are divided into two parts in the longitudinal direction. I do.

According to the present invention, even when the moving member is large, the resin circulation path molded body is separate from the moving member main body. The running water is not limited by the moving member body,
By increasing the number of gates, it is possible to secure sufficient hot water,
Good moldability. In particular, since the load rolling element passage forming part along the side edge of the rolling element rolling part is thin and hard to melt, it is effective to adopt a separate structure from the moving member main body as in the present invention.

Further, since the continuous circulation path is constituted by the resin circulation path molded body, the relative positional relationship between the direction changing path inner peripheral guide portion and the load rolling element path forming portion, and the direction changing path inner peripheral guide portion and the rolling direction are changed. The relative positional relationship between the moving body escape passages is directly determined, the continuity of the circulation path can be ensured, and the smooth transition of the rolling elements is guaranteed.

[0016] The relative positional relationship between the inner periphery guide portion of the turning path and the load rolling element passage forming section is that the load rolling element passage forming section is located on both side edges of the rolling element rolling section. It will coincide with the side edge position of the part.

Further, the relative positional relationship between the direction changing path inner peripheral guide portion and the rolling element escape path is such that the direction changing path inner peripheral guide section and the rolling element escape path inner peripheral portion match.

In particular, the connecting portion between the load rolling element passage forming portion and the turning path inner circumferential guide forming portion, in which the direction of the rolling member changes,
If the connecting portion of the direction changing path inner peripheral guide component and the escape passage component is integrally formed, assembly of the connecting portion is unnecessary, and continuity is ensured without being affected by assembly accuracy.

The rolling element escape passage is constituted by a through hole formed in the moving member main body, and the resin circulation path molded body is paired with a load rolling element passage forming part extending along both side edges of the rolling element rolling part. And a connecting portion between the load rolling element passage forming portion and at least one of the pair of direction changing path inner circumferential guide forming portions may be integrally formed.

Even in the case where there is no escape passage constituting portion made of resin, the connecting portion between the load rolling member passage constituting portion and the direction changing passage inner peripheral guide constituting portion is continuously formed, whereby the rolling member in the load region is formed. The transition of the rolling element between the rolling section and the turning path is smoothly performed.

In addition, molding is facilitated by the absence of the escape passage constituting portion.

Further, a rolling element holding band for holding a large number of rolling elements at predetermined intervals is provided, and a guide groove for guiding a side edge of the rolling element holding band is provided over the entire circumference of the circulation path. And

The load rolling element passage forming portion is provided with a holding portion for preventing the rolling element holding band from falling off when the moving member is removed from the track member, and the side edge of the rolling element holding band is formed over the entire circumference of the circulation path. It is characterized in that a holding band guide for guiding is provided continuously.

When the rolling element holding band is mounted as described above, the continuity of the holding band guide is also maintained, so that the rolling elements can be smoothly transferred through the rolling element holding band.

Also, since the thin holding band guide is formed without inserting the moving member main body, the position of the gate can be freely set without being restricted by the moving member main body, and every corner can be formed at the time of molding. The resin can be sufficiently turned.

Also, the direction changing path inner circumference guiding component has a thin plate portion joined to the end face of the moving member main body, and is connected to the load rolling element passage forming portion or the relief passage forming portion through the thin plate portion. It is characterized by having been done.

[0027] By connecting the inner periphery guide component of the turning path and the load rolling element rolling component via the thin plate portion,
Between the inner circumference guide component of the direction change path and the load rolling element passage component,
Or, even when there is a distortion between the turning path inner circumference guide component and the rolling element escape path component, it is absorbed by the deformation of the thin plate portion, and one end of the direction switching path inner circumference guiding section and the load rolling element path configuration. The relative positional relationship between the parts, or the positional relationship between the inner circumferential guide portion of the turning path and the rolling element escape passage, is accurately determined.

On the other hand, since the thin plate portion is pressed against the flat end surface of the moving member main body by the side cover by the tightening force of the side cover, the attitude (direction with respect to the end surface of the moving member main body) of the direction changing path inner circumferential guide forming portion is distorted. In this case, the posture of the direction changing path inner circumference guiding component is corrected by the bending of the thin plate portion.

Further, the thin plate portion is firmly fastened and fixed by the fastening force of the side lid, and there is no displacement of the inner circumferential guide portion of the direction changing path.

The track member is a track rail, and the moving member is a moving block having a horizontal portion facing the upper surface of the track rail and a pair of sleeves sandwiching the left and right side surfaces of the track rail. Two rows between the bottom of the moving block,
A total of four rows may be provided between the left and right side surfaces of the track rail and the inner side surface of the sleeve portion, one each for upper and lower rows.

The track member is a track rail, the moving member is a moving block having a pair of sleeves sandwiching the left and right side surfaces of the track rail, and the rolling elements are the left and right side surfaces of the track rail and the left and right sleeve portions of the moving block. A total of four rows may be provided between the inner side surfaces of each of the two upper and lower rows.

In this case, the direction-turning-path inner-peripheral-guiding component may be configured such that four direction-turning-path inner-peripheral-guiding parts are integrally connected together, or two right and left sides are integrally connected together. Is also good.

The track member is a track rail, the moving member has a horizontal portion facing the upper surface of the track rail and a sleeve portion facing one side of the track rail, and the rolling element is a sleeve member of the moving member of the track rail. It is also possible to form a two-row configuration in which one row is arranged on one opposing side surface and one row is formed on the upper corner of the track rail.

The track member is a track rail, the moving member is a moving block having a pair of sleeves sandwiching the left and right side surfaces of the track rail, and the rolling elements are the left and right side surfaces of the track rail and the left and right sleeve portions of the moving block. It is also possible to form a two-row configuration, one row at a time, between the inner side surfaces.

Further, the track member is a track rail, the moving member is a moving block provided along one side surface of the track rail, and the rolling elements are provided in two rows vertically between the one side surface of the track rail and the moving block. Configuration.

The track member may be a spline shaft, and the moving member may be constituted by an outer cylinder which is movably fitted to the spline shaft via a plurality of rolling element rows.

A track rail provided with a total of four rolling element rolling portions, two on each of the left and right side surfaces, and a pair of sleeve portions sandwiching the left and right side surfaces of the track rail, is provided on the inner surfaces of the pair of sleeve portions. A moving block provided with a total of four load rolling element rolling parts, two corresponding to the rolling element rolling parts provided on the track rail, and the moving block comprising: Four rolling element escape passages provided in parallel with the rolling element rolling portion;
In the linear motion guide device in which the rolling element rolling section and the direction change path connecting both ends of the rolling element escape path form four infinite circulation paths, the load rolling element rolling elements forming the respective infinite circulation paths are provided. A pair of load rolling element passage components that extend along both side edges of the running portion, a relief passage component that constitutes the relief passage, and a pair of direction change path inner circumferences that form an inner circumferential guide of the direction change path A continuous resin circulation path molded body provided with a guide component is formed separately from the moving block main body, and the resin circulation path molded body is provided on each of the left and right sleeves of the moving block by two endless infinite sections. The resin circulation path molded body is integrally formed with a load rolling element passage configuration part and a pair of direction change path inner peripheral guide configuration parts so as to form a circulation path, and the escape path configuration part is separated. It is characterized by having a body.

According to the present invention, even when the moving block is large, the resin circulation path molded body is separate from the moving block main body. The runner is not restricted by the moving block main body, and the runner can be sufficiently secured by increasing the number of gates, and the moldability is good. In particular, since the load rolling element passage forming part along the side edge of the rolling element rolling part is thin and hard to melt, it is effective to adopt a separate structure from the moving member main body as in the present invention.

In particular, since the molded resin circuit forming the two endless left and right infinite circulation paths is divided into two parts on the left and right sides, even when the width of the moving block main body is large, it is possible to secure the hot water circulation. .

Further, since the continuous circulation path is constituted by the resin circulation path molded body, the relative positional relationship between the direction change path inner circumference guide portion and the load rolling element passage configuration portion, and the direction change path inner circumference guide portion and the rolling direction are changed. The relative positional relationship between the moving body escape passages is directly determined, the continuity of the circulation path can be ensured, and the smooth transition of the rolling elements is guaranteed.

The relative positional relationship between the inner periphery guide portion of the turning path and the load rolling element passage forming section is such that the load rolling element passage forming section is located on both side edges of the rolling element rolling section, so It will coincide with the side edge position of the part.

Further, the relative positional relationship between the direction changing path inner peripheral guide portion and the rolling element escape passage is such that the direction changing path inner peripheral guide portion and the rolling element escape path inner peripheral portion match.

In particular, if the connecting part of the load rolling element passage forming part and the turning path inner circumferential guide forming part, in which the direction of the rolling element changes, is integrally formed, assembly of the connecting part is unnecessary, and the assembling accuracy is affected. The continuity is ensured without being performed.

A guide groove for holding the plurality of rolling elements in series at a predetermined interval and having a rolling element holding band having side edges protruding from both side ends of the rolling elements, and guiding the side edge of the rolling element holding band; Is provided over the entire circumference of the circulation path.

When the rolling element holding band is mounted as described above, the continuity of the holding band guide is also maintained, so that the rolling elements can be smoothly transferred through the rolling element holding band.

Also, since the thin holding band guide is formed without inserting the moving member main body, the position of the gate can be freely set without being restricted by the moving member main body, and every corner can be formed at the time of molding. The resin can be sufficiently turned.

Further, the direction changing path inner peripheral guide portion has a thin plate portion joined to the end face of the moving member main body, and is connected to the load rolling element passage forming portion or the relief passage forming portion through the thin plate portion. It is characterized by having been done.

[0048] By connecting the inner circumference guide component of the turning path and the load rolling element rolling component via the thin plate portion,
Between the inner circumference guide component of the direction change path and the load rolling element passage component,
Or, even when there is a distortion between the turning path inner circumference guide component and the rolling element escape path component, it is absorbed by the deformation of the thin plate portion, and one end of the direction switching path inner circumference guiding section and the load rolling element path configuration. The relative positional relationship between the parts, or the positional relationship between the inner circumferential guide portion of the turning path and the rolling element escape passage, is accurately determined.

On the other hand, since the thin plate portion is pressed against the flat end surface of the moving member main body by the side cover due to the tightening force of the side cover, the attitude (direction with respect to the end surface of the moving member main body) of the direction changing path inner circumferential guiding component is distorted. In this case, the posture of the direction changing path inner circumference guiding component is corrected by the bending of the thin plate portion.

Further, the thin plate portion is firmly fixed by the tightening force of the side cover, and there is no displacement of the direction changing path inner circumferential guide portion.

[0051]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the illustrated embodiment.

[Embodiment 1] FIGS. 1 to 7 show a linear motion guide device according to Embodiment 1 of the present invention.

The linear motion guide device 1 is provided movably via a track rail 2 as a track member extending substantially linearly and a number of balls 3 as rolling elements along the track rail 2. A moving block 4.

The track rail 2 is a long body having a rectangular cross section.
2 rails on the horizontal upper surface of track rail 2 and 1 on the left and right vertical sides
A total of four ball rolling grooves 5, 5, 5, 5 are provided.

The moving block 4 has a horizontal portion 6 facing the upper surface of the track rail 2, sleeve portions 7 extending downward from both left and right sides of the horizontal portion 6 and facing the left and right side surfaces of the track rail 2,
It is constituted by a block body having a U-shaped cross section that opens downward and has On the lower surface of the horizontal portion 6, two ball rolling grooves 8, 8 corresponding to the ball rolling grooves 5, 5 provided on the upper surface of the track rail 2 are provided. A single ball rolling groove 8, 8 corresponding to the ball rolling grooves 5, 5 on the left and right side surfaces of the rail 2 is provided.

Further, the moving block 4 has four ball escape passages 9, 9, 9, 9 provided in parallel with the four ball rolling grooves 8, 8, 8, 8, and the ball rolling grooves. Groove 8,
U-shaped pipe-shaped direction change path 10, 10, 10, 1 connecting both ends of 8, 8, 8 and ball escape paths 9, 9, 9, 9
0 and 4 form four infinite circulation paths. Ball escape passages 9, 9, 9, 9 corresponding to the two ball rolling grooves 5, 5 on the upper surface side of the track rail 2 are provided in the horizontal portion 6 of the moving block 4 one by one on the left and right side surfaces of the track rail 2. Ball escape passages 9, corresponding to the ball rolling grooves 5, 5, 5, 5 of
Reference numerals 9, 9, 9 are provided on both sleeves 7, 7 of the moving block 4, respectively.

In this embodiment, four rows of balls 3
As shown in FIG. 4, a ball holding band 1 as a rolling band holding band
2 are connected in series through the ball holding belt 12.
It is designed to circulate while being guided.

The ball holding band 12 has a flexible belt portion 12 provided with a ball hole 12a into which each ball 3 is inserted.
b, and a spacer portion 12 c interposed between the balls 3, and a side edge of the belt portion 12 b projects outward beyond the outer diameter of the ball 3.

The spacer portion 12c is provided with a spherical crown-shaped holding concave portion 12d corresponding to the spherical surface of each ball 3. The holding concave portion 12d supports the ball 3 from both sides to prevent the ball 3 from falling off from the belt portion 12b. doing. In this embodiment, both ends of the belt portion 12b have an endless belt-like configuration that is not connected, but may have an endless configuration in which both ends of the belt portion 12b are connected.

The moving block 4 includes ball rolling grooves 8, 8,.
A block main body 13 provided with 8, 8 and a resin circulation path molded body 20 made of resin incorporated in the block main body 13;
And a pair of side lids 40 mounted on the end surface of the block body 13 in which the resin circulation path molded body 20 is incorporated.

Each of the circulation paths of the resin circulation path molded body 20 includes a pair of load ball passage components 21 and 21 extending along both side edges of the ball rolling groove 8 and a pair of end surfaces of the block body 13. Direction change path inner circumference guide component 22,
22 and through-hole 1 formed through block body 13
Resin pipe 23 as escape passage constituting part inserted in 4
In this embodiment, a load ball passage forming part 21 and a pair of direction change path inner circumferential guiding parts 22 and 2 are provided.
2 are integrally formed, and the resin pipe 23 is formed separately. That is, the connection portions of the load ball passage components 21 and 21 and the pair of direction change path inner peripheral guide components 22 and 22 are integrally formed to form an integrated resin frame 24, and the four resin pipes 23 are divided. Thus, it can be incorporated into the block body 13.

The load ball passage components 21 and 21 are provided with linear guide grooves for guiding the side edge of the belt holding portion 12b of the ball holding band 12 in the load region, so that the ball 3 is held when the ball 3 rolls. While preventing the run-out of the belt 12,
When the moving block 4 is detached from the track rail 2, the side edge of the belt portion 12b is hooked on the guide groove 21a constituting the guide portion to prevent the ball holding band 12 from hanging down. The ball 3 itself is held by a ball holding band 12, and the ball 3 is held so as not to fall off the moving block 4 via the ball holding band 12 held by a jaw 21b of a guide groove 21a.

In this embodiment, the opening width between the load ball passage forming portions 21 and 21 on both side edges of the ball rolling groove is slightly larger than the ball diameter, and if there is no ball holding band 12, the ball 3 falls off. As shown in FIG. 3 (d), if the projecting amount of the jaw 21b is set so that the opening width of the pair of load ball passage forming parts 21 and 21 is smaller than the ball diameter, as shown in FIG. As shown in (e), the ball 3 can be prevented from falling off even without the ball holding band 12, and can be used both when the ball holding band 12 is loaded and when the ball 3 alone is loaded. it can. Of course, FIG.
As shown in FIG. 3, the load ball passage components 21 and 21 are held so as to hold only the ball 3 without the ball holding band 12.
May be slightly smaller than the ball diameter.

In the direction change path 10 and the ball escape path 9 in the no-load area, guide grooves 9c, 10c for guiding the side edges of the belt portion 12b are formed continuously around the entire circumference of the guide groove 21a in the load area. Have been.

As shown in FIG. 3 (f), when the ball holding band 12 is not used, the opening width of the pair of load ball passage forming portions 21 and 21 located on both side edges of each ball rolling groove 8 is changed to the ball width. If the diameter is smaller than the diameter, falling off of the ball 3 can be prevented.

Four sets of load ball passage components 21 and 21
A first thin connecting plate portion 25 extending in the longitudinal direction along the lower surface of the horizontal portion 6 of the block body 13;
3 and a pair of second L-shaped cross sections extending in the longitudinal direction of the block body 13 along the corners of the horizontal portions 6 and the sleeve portions 7 and 7.
Connecting plate portions 26, 26 and both sleeve portions 7,
And a pair of third connecting plate portions 27, 27 extending in the longitudinal direction of the block body 13 along the lower end face of the block 7.

That is, the first connecting plate portions 2 facing each other
5 and the upper edges of the pair of left and right second connecting plate portions are located at the groove side edges of the ball rolling grooves 8, 8 provided on the lower surface of the horizontal portion 6, and the load ball passage forming portions 21, 21; 21 and 21. Further, the lower edge of the second connecting plate portion 26 and the inner edge of the third connecting plate portion 27 facing each other are located on the groove side edges of the ball rolling grooves 8 provided on the inner side surfaces of the sleeve portions 7. To form the load ball passage components 21 and 21;

On the other hand, the direction changing path inner peripheral guide component 22 has a thin plate portion 29 joined to the end face of the block body 13, and through this thin plate portion 29, the load ball passage components 21 and 21 and the resin The pipe 23 is connected. In this embodiment, the direction-turning-path inner-peripheral guide components 22, 2
2 and the load ball passage components 21 and 21 are integrally formed via the thin plate portion 29, and the resin pipe 23 is fitted in a fitting hole 34 provided in the thin plate 29 and fixedly positioned.

The thin plate portion 29 includes a first end plate portion 30 corresponding to the end surface of the horizontal portion 6 of the block body 13, a pair of third end plate portions 32, 32 corresponding to the end surfaces of the sleeve portions 7, 7, and A second end plate portion 3 connecting the first end plate portion 30 and the third end plate portions 32, 32
1, 31. The first end plate portion 30 is formed with a protruding portion 22 of a turning path inner circumference corresponding to the two rows of balls 3 on the upper surface side of the track rail 2. The third end plate portion 32 has a track rail. The direction change path inner circumference guide components 22, 22 corresponding to each row of balls 3, 3 on the two side surfaces are formed to protrude.

Then, both ends of the first connecting plate portion 25 extending in the longitudinal direction are connected between the lower end portions of the first end plate portions 30 at both ends of the block body 13, and the inner edges of the second end plate portions 31, 31 are joined. Both ends of a second connecting plate portion 26 extending in the longitudinal direction between the portions are joined, and both ends of a third connecting plate portion 27 extending in the longitudinal direction between the lower edges of the third end plate portion 32 are joined to form one piece. A resin frame 24 is configured.

Each of the turning guides 22 has a half-cylindrical shape, and an inner circumferential guiding groove 10a having an arc-shaped cross section which forms an inner guiding portion of the turning guide 10 is formed on the outer periphery thereof. One end of the inner circumferential guide groove 10a is connected to the end of the ball rolling groove 8, and is formed into the same cross-sectional shape as the ball rolling groove 8, and coincides with the end position of the ball rolling groove 8. Is positioned as follows. Also, the inner circumferential guide groove 10 of the direction changing path 10
The other end of “a” is connected to the end of the ball escape passage 9, is formed into the same cross-sectional shape as the ball escape passage 9, and is positioned so as to coincide with the position of the end of the ball escape passage 9.

Further, a cylindrical edge portion 33 having a width larger than the width of the belt portion 12b is provided at the groove side edge of the inner peripheral guide groove 10a. The cylindrical edge 33 is provided with a side cover 4 described later.
The holding band guide groove 10c of the ball holding band 12 is formed in cooperation with the semicircular stepped recess provided on the inner periphery of the 0 recess.

Both ends of the inner circumferential guide groove 10a of the direction change path 10 are connected to both ends of the ball rolling groove 8 and the ball escape passage 9 so that the block body 13 of the first and third end plate portions 30, 32 is connected. It extends to the contact surface side with the end surface. On the other hand, the first and third end plate portions 30 and 32 have semicircular pipe fitting holes 34, 34, 34, 3 into which the ends of the resin pipe 23 are fitted.
4 are provided.

As shown in FIG. 7, the resin pipe 23 includes an inner peripheral pipe half 23 a located on the outer peripheral side of the circulation path which is continuous with the inner peripheral guide groove 10 a, and a directional change path of the side lid 40. And an outer peripheral pipe half 23b positioned on the outer peripheral side of the continuous circulation path. The inner peripheral pipe half 23a has a groove 9a having an arcuate cross section and a side end surface 23c extending in the longitudinal direction along both side edges of the groove 9a.

The outer pipe half 23b is a linear member having the same arc-shaped cross section as the direction guide path outer guide groove 10b of the side lid 40, and has a groove 9b continuous with the outer guide groove 10b, and both sides of the groove 9b. Side end 2 extending longitudinally along the edge
3d. Further, on the outer edge of the side end face 23d, there is provided a jetty 23e which comes into contact with the outer edge of the side end face of the inner peripheral pipe half 23a to form the holding band guide groove 9c of the ball holding band 12.

The inner peripheral pipe half 23a of the resin pipe 23
Is equal to the length of the block body 13 and is positioned in the longitudinal direction by abutting against the back surface of the turning path inner circumference guiding component 22.

On the other hand, the length of the outer pipe half 23 b of the resin pipe 23 is smaller than the length of the block body 13.
9 and is fitted in the fitting holes 34 of the first and third end plate portions 30 and 32. Both end surfaces of the outer peripheral pipe half 23b fitted into the fitting hole 34 abut against the peripheral edge of the end of the direction change path outer peripheral guide groove 10b of the side cover 40, and positioning in the longitudinal direction is performed. In addition, the jetty formed on both side edges of the outer pipe half 23b abuts on the outer edge of the cylindrical edge 33 formed in the turning path inner circumference guide component 22, and a part of the guide groove 10c is formed. In addition, the outer pipe half 23b and the inner pipe half 23a inserted into the through hole 14 are prevented from rotating.

As described above, the resin pipe 23 and the direction-turning-path inner-peripheral guiding component 22 are formed by the first and third portions of the thin plate portion 29.
It is accurately positioned and assembled through fitting holes 34 formed in the end plate portions 30 and 32.

On the other hand, as shown in FIG. 5, the side cover 40 has a stepped concave portion 40a into which the thin plate portion 29 is fitted, and a direction change portion into which the direction change path inner circumference guide forming portion 22 is fitted. 4 provided with a direction change road outer periphery guide groove 10b as a road outer periphery guide portion
It has a concave portion 41 at a location and a fastening portion for fastening the side lid 40 to the block body 13. The fastening part is a bolt insertion hole 43 formed in the side lid 40.
A bolt 44 is inserted into the hole, and screwed into a bolt hole 45 formed in the end face of the block body 13 to fasten and fix it. The position of the bolt insertion hole 43 is
Are located between the first and third end plate portions 30 and 32.

As shown in FIG. 7, the side edge of the turning direction outer circumferential guide groove 10b of the concave portion 41 cooperates with the cylindrical edge 33 of the turning direction inner circumferential guide component 22 as shown in FIG. A semicircular large-diameter step portion 46 that forms the holding band guide groove 10c and a small-diameter step portion 47 into which the cylindrical edge 33 is fitted are provided. Then, the turning path inner peripheral guide portion 22 having the turning path inner peripheral guide groove 10a formed therein is fitted into the concave portion 41 of the side lid 40 and the thin plate portion 2 is inserted into the step concave portion 46 of the side lid portion 40.
9, the thin plate portion 29 is sandwiched and fixed between the side cover 40 and the end face of the block body 13 by the tightening force.

By connecting the turn-around path inner circumference guide portion 22 and the load ball passage forming portion 21 via the thin plate portion 29, the turn-around path inner circumference guide portion provided on the turn-around path inner circumference guide portion 22 is provided. 10a and one end of load ball passage component 2
The relative positional relationship between 1, 21 or the positional relationship between the inner circumferential guide portion 10a of the turning path and the ball escape passage 9 is accurately determined.

On the other hand, the thin plate portion 29 around the guide member 22 around the inner periphery of the turning path is moved by the tightening force of the side cover 40.
0 (see the dashed line in FIG. 7A), so that even if the attitude (direction) of the turning path inner circumferential guide portion 28 is distorted, the block body 13 is pressed against the end surface of the block body 13 evenly. The thin plate portion 29 is flexed to follow and the distortion of the direction changing path inner peripheral guide portion 22 is corrected.

Further, the thin plate portion 29 is firmly fixed by the tightening force of the side lid 40, and there is no displacement of the direction changing path inner circumferential guide portion 10a due to the frictional force.

The side cover 40 is fixed by fitting the concave portion 41 of the side cover 40 into the direction changing path inner circumferential guide portion 22 assembled to the block body 13. It is accurately positioned and fixed to the block main body 13 by the concave and convex fitting with the guide portion 22.

FIG. 6 shows a procedure for assembling the resin circulation path molded body 20.

First, the inner peripheral pipe half 23a of the resin pipe 23 is inserted into the through hole 14 of the block body 13 (see FIGS. 6A and 6B).

Next, the thin plate portions 29 at both ends of the integrally molded resin frame 24 are inserted from below while sliding along the end surface of the block body 13 (see FIGS. 6C and 6D). The first connecting plate portion 25 of the resin frame 24 is
The second connection plate portion 26 and the third connection plate portion 27 of the resin frame 24 are in contact with the inner surfaces of the sleeves 7, 7 of the block body 13 so as to be positioned in the vertical direction by contacting the lower surface. Positioning of the passage components 21 and 21 and the direction changing path inner peripheral guide component 22 is performed (FIGS. 6E and 6F).
reference). At this time, the fitting hole 34 of the thin plate portion 29 matches the through hole 14 of the block body 13.

Next, the outer pipe half 23 b is inserted into the through hole 14 through the fitting hole 34, and the resin circulation path molded body 2
0 is completed (see FIGS. 6 (g) and 6 (h)).

Thereafter, one side cover 40 is attached to the block body 1.
3 and is inserted into the ball holding band 12 (not shown).
Is fixed to the other end face of the moving block 4, and the assembly of the moving block 4 is completed.

According to the present invention, even when the moving block 4 is large, the resin circulation path molded body 20 is separate from the block main body 13, so that the block main body 13 and the resin circulation path molded body 20 are integrally molded. As shown in the above, the runner is not limited by the block body 13, and the runner can be sufficiently ensured by increasing the number of gates, and the moldability is good. In particular, the load ball passage constituting portion 21 on the groove side edge of the ball rolling groove 8,
Since 21 is thin and it is difficult for the hot water to run, it is effective to form the block 21 separately from the block body 13 as in the present embodiment.

Further, since the continuous circulation path is constituted by the resin circulation path molded body 20, the inner circumferential guide groove 10 for the direction change path is formed.
The relative positional relationship between the a and the load ball passage components 21 and 21 and the relative positional relationship between the direction changing path inner peripheral guide groove 10a and the ball escape path 9 are directly determined, thereby ensuring the continuity of the circulation path. As a result, a smooth transition of the ball 3 is guaranteed.

The relative positional relationship between the inner circumferential guide groove 10a and the load ball passage components 21 and 21 of the direction change path is such that the load ball passage components 21 and 21 are located on both side edges of the ball rolling groove 8, This corresponds to the side edge position of the guideway inner circumferential guide groove 10a.

The relative positional relationship between the inner circumferential guide groove 10a of the turning path and the ball escape passage 23 is the same as that of the inner circumferential guide groove 10a of the turning path and the inner circumferential groove 23a of the ball escape path 9. .

In particular, the load ball passage components 21 and 21 in which the direction of the ball 3 changes and the direction change path inner circumference guide component 2
Since the two connecting portions are integrally formed, assembly of the connecting portions is unnecessary, and continuity is ensured without being affected by assembly accuracy. Transfer of the ball 3 from the loaded ball passage between the ball rolling grooves 5 and 8 to the turning path 10 or the turning path 10
The movement of the ball 3 from the ball to the ball escape passage 9 is smoothly performed.

Next, an example of changing the division position of the resin circulation path molded body 20 will be described.

In the following description of the modification, only the points different from the first embodiment will be described, and the same components as those in the first embodiment will be denoted by the same reference numerals and description thereof will be omitted. .

[First Modification] FIGS. 8 and 9 show a first modification of the resin circulation path molded body 20 of the first embodiment.

In the first modification, the resin circulation path molded body 20
The first resin frame 20A is formed by integrally joining the load ball passage components 21 and 21 and the resin pipe 23 as an escape passage component at one end thereof to one of the direction change path inner peripheral guide components 22A. And the second resin frame 20B provided with the other direction change path inner circumference guide component 22B
Is a separate configuration.

In this case, the load ball passage components 21 and
1 and the direction-turning-path inner-peripheral guide component 22 are integrally formed via a thin plate portion 29A as in the first embodiment.

On the other hand, the direction changing path inner peripheral guide portion 22 and the resin pipe 23 are also integrally formed via the thin plate portion 29A. In this case, the resin pipe 23 is not formed in half, but is integrally formed as a round pipe. Therefore, there is no fitting hole 34 in the thin plate portion 29A, and the ball escape passage 9 is directly opened.

Further, the connection between the first resin frame 20A and the second resin frame 20B is positioned, for example, as shown in FIG. In the illustrated example, the second resin frame 24B
A locking concave portion 36 such as a dovetail groove is provided on the load ball passage forming portions 21 and 21 and a locking convex portion 35 engaged with the locking concave portion 36 is provided.

In this case, the resin pipe 23 of the first resin frame 20A is inserted into the through hole 14 of the block body 13, and the first, second and third connecting plate portions 25, 26, 27 are connected to the horizontal portion of the block body 13. 6 are inserted along the lower surface and the inner surfaces of the sleeves 7,7.

Then, the tip of the resin pipe 23 and the first
The locking projection 35 provided at each free end of the second and third connecting plate portions 25, 26, 27 is applied to the other end surface of the block body 13 by the thin plate of the second resin frame 24B. It is locked and fixed in the locking recess 36 formed in the portion 29B.

The locking convex portion 35 and the locking concave portion 36 are provided on the first resin frame 20A side, and the second resin frame 2
It goes without saying that a locking projection may be provided on the 0B side. Further, the present invention is not limited to such a locking concave portion and a locking convex portion, and any locking structure may be employed as long as the divided ends can be positioned and fixed.

[Modification 2] FIGS. 10 and 11 show a modification 2 of the resin circulation path molded body 20 of the first embodiment.

In the second modification, the resin circulation path molded body 20
The load ball passage forming part 21 and the escape passage forming part 23 are integrated with the resin pipe 23 serving as the relief passage forming part and the pair of direction change path inner circumferential guide forming parts 22 and 22. It is divided into two in the middle of the direction. In other words, the load ball passage component 21
And the resin pipe 23 are divided into two parts at an intermediate position in the longitudinal direction, and the divided load ball passage forming part 21 and the resin pipe 23 are respectively divided into a pair of direction changing path inner circumferential guiding parts 22,
22 and two resin frames 20 having the same shape.
C, 20D.

The four sets of load ball passage components 21 and 21 are provided on the first, second and third connecting plate portions 25, 26 and 27, respectively. , 2
A locking projection 37 and a locking recess 38 are provided on the divided ends of the plastic pipes 6 and 27 and the divided end of the resin pipe 23 so as to engage with each other.

[Third Modification] FIGS. 12 to 14 show a third modification of the resin circulation path molded body 20 of the first embodiment.

In the third modification, the first, second, and third connecting plates provided with the load rolling element rolling path components 21, 21 by omitting the resin pipe 23 as the relief path component of the first embodiment. The resin frame 20E is formed by integrally molding the thin plates 29, 29 provided with the portions 25, 26, 27 and the pair of direction change path inner circumferential guide components 22, 22. The ball escape passage 9 is constituted by the through hole itself formed in the block body 13.

In this case, for example, the connection between the end of the ball escape passage 9 and the inner periphery guide component 22 of the turning path is formed by the ball escape passage 9 at the opening edge of the ball hole 39 of the thin plate portion 29.
It is only necessary to provide an engaging projection 39a that engages with the chamfered portion 15 provided at the opening end of the connector.

Further, in the illustrated example, the connection edge of the direction change path outer peripheral guide groove 10b of the side cover with the ball escape passage 9 is fitted into the ball hole 39 of the thin plate portion 29, and the ball escape passage 9 A semicircular engagement projection 48 is provided to engage with the chamfered portion 15 at the opening edge.

[Fourth Modification] FIG. 15 shows a fourth modification of the resin circulation path molded body 20 of the first embodiment.

In the fourth modification, the resin frame 20F is formed by integrally forming the load ball passage constituting portion 21 and one of the direction change path inner peripheral guide constituting portions 22 with the configuration in which the resin pipe 23 of the third modification is omitted. Then, the resin frame 20G provided with the other direction change path inner circumference guide component 22 is separately provided, and the engaging convex portion 35 and the engaging concave portion 36 are positioned and fixed by engaging and recessing. Other configurations are exactly the same as those of the third modification.

[Modified Example of Ball Row] In the first embodiment and the first to fourth modified examples, the case where the ball row is provided with two rows on the upper surface of the track rail 2 and one row on each side surface, that is, a total of four rows is described. However, as shown in FIG. 16, other configurations of the ball row can be applied as a matter of course, and the dividing positions of the resin circulation path molded body 20 are all the same as those of the first embodiment in the illustrated example. Although shown by a pattern, all types of the modified examples 1 to 4 can be applied.

In the example shown in FIGS. 16 (a) and 16 (b), a ball as a rolling element is placed between the left and right side surfaces of the track rail 2 and the inner side surfaces of the left and right sleeves 7 and 7 of the moving block, two rows each in a vertical direction, for a total of 4 rows. Rows are provided.

FIG. 16 (b) shows the resin circulation path molded body 20 in which all of the ball circulation paths of four rows are integrated, but as shown in FIG. The resin circulation path molded body 20 may be divided.

In the example shown in FIGS. 16C and 16D, the moving block 4 has a horizontal portion 6 facing the upper surface of the track rail 2 and a sleeve portion 7 facing one side surface of the track rail 2. The balls 3 as rolling elements are arranged in a line between one side surface of the track rail 2 and the sleeve 7 of the moving block 4 and the opposing surface. This is an example in which a two-row configuration is provided, with one row at the corner.

The example shown in FIGS. 16 (e) and (f) is a moving block 6 provided with a pair of sleeves 7, 7 sandwiching the left and right side surfaces of the track rail 2, in which the ball 3 as a rolling element has a track. A single row is provided between the left and right side surfaces of the rail 2 and the inner side surfaces of the left and right sleeve portions 7, 7 of the moving block 6, so that a total of two rows are provided.

In the example shown in FIGS. 16 (g) and 16 (h), the moving block 4 is provided along one side surface of the track rail 2, and the ball 3 is vertically moved between one side surface of the track rail 2 and the moving block 4.
This is a configuration in which rows are provided.

[Second Embodiment] FIGS. 18 to 20 show a second embodiment of the present invention.

In the second embodiment, rollers are used as rolling element rows.

That is, this linear motion guide device is similar to that shown in FIG.
As shown in FIG. 9, a track rail 202 as a track member extending linearly, and a moving block 204 movably provided along the track rail 202 via a number of rollers 203 as rolling elements. Have.

The track rail 202 is a long body having a rectangular cross section, and has two roller rolling surfaces 205, 205 on the horizontal upper surface and one on the vertical left and right side surfaces of the track rail 202.
205, 205 are provided.

The moving block 204 includes the track rail 202.
A downwardly open U-shaped block comprising a horizontal portion 206 facing the upper surface of the rail, and sleeve portions 207, 207 extending downward from both left and right sides of the horizontal portion 206 and facing the left and right sides of the track rail 202. It is composed by the body. On the lower surface of the horizontal portion 206, two roller rolling surfaces 208, 208 corresponding to the roller rolling surfaces 205, 205 provided on the upper surface of the track rail 202 are provided. One roller rolling surface 20 corresponding to each of the roller rolling surfaces 205 on the left and right sides of the rail 202
8, 208 are provided.

Further, the moving block 204 has four roller escape passages 209, 209, 2 provided in parallel with the four roller rolling surfaces 208, 208, 208, 208.
09, 209 and the roller rolling surfaces 208, 208, 2
08, 208 and roller escape passages 209, 209, 20
The U-shaped pipe-shaped direction change paths 210, 210, 210, 210 connecting both ends of 9, 209 constitute four circulation paths.

Roller escape passages 209, 209 corresponding to the two roller rolling surfaces 205, 205 on the upper surface side of the track rail 202.
209 is a roller escape passage 209,2 corresponding to two roller rolling surfaces 205,205, one on each of the left and right side surfaces of the track rail 202, in the horizontal portion 206 of the moving block 204.
Reference numeral 09 is provided on each of the two sleeves 207 of the moving block 204.

In this embodiment, a large number of rollers 203 inserted into each circulation path are connected in series via a roller holding band 212, and while being guided by the roller holding band 212, each of the circulation paths 211, 211, 211 , 211 are circulated.

FIGS. 19B to 19D show the roller holding band 212.
, A flexible belt portion 212b provided with a roller hole 212a into which each roller 203 is inserted,
Each of the rollers 203 has a spacer portion 212 c interposed between the rollers 203, and a side edge of the belt portion 212 b projects outward beyond the outer diameter of the roller 203.

The spacer portion 212c is provided with a holding concave portion 212d having an arc-shaped cross section corresponding to the cylindrical surface of each roller 3, and the roller 203 is supported from both sides by the holding concave portion 212d so that the roller 203 comes off from the belt portion 212b. Has been prevented. In this embodiment, the belt 212
Although both ends of b are in the form of an end strip which is not connected,
An endless configuration in which both ends of the belt portion 212b are connected may be adopted.

The moving block 204 corresponds to FIG. 18 and FIG.
0, the roller rolling surfaces 208, 208, 2
Metal block body 213 provided with 08, 208
And a resin circulation path molded body 220 made of resin to be incorporated into the block main body 213, and a pair of side lids 214, 214 attached to the end surface of the block main body 213 into which the resin circulation path molded body 220 is incorporated. Configuration.

In this embodiment, the four circulation paths are two
It is constituted by two resin circulation path molded bodies 220, 220.

The circulation path of each resin circulation path molded body 220 is formed by a pair of load roller passage forming parts 221 and 221 extending along both side edges of the roller rolling surface 208 and a pair of end faces of the block body 213. It has direction change path inner circumference guide components 222, 222 and a resin pipe 223 as an escape passage component inserted into a through hole formed through the block main body 213.

As shown in detail in FIG. 20, guide grooves 221a for guiding the side edge of the belt portion 212b of the roller holding band 212 in the load region are provided in the load roller passage forming portions 221 and 221 in a linear manner. In addition to preventing the roller holding band 212 from oscillating when the rolling movement of the roller 203 is performed,
When the moving block 204 is removed from the track rail 202, the side edge of the belt portion 212b is hooked on the jaw 221b constituting the guide groove 221a to prevent the roller holding band 212 from hanging down. The roller 203 itself is held by a roller holding band 212,
3 is held so as not to drop off from the moving block 204 via the roller holding band 212 held by the holding section.

In this embodiment, both ends of the belt portion 212b are in the form of an end band which is not connected, but may be in an endless structure in which both ends of the belt portion 212b are connected.

The guide grooves 210c and 209c for guiding the side edge of the belt portion 212b are also provided in the direction change path 210 and the roller escape path 209 in the no-load area.
It is formed over the entire circumference continuously from 1a.

In each of the resin circulation path molded bodies 220, the load roller passage forming parts 221 and 221 and the pair of direction change path inner circumferential guide forming parts 222 and 222 are integrally formed, and the resin pipe forming the roller escape passage 209 is formed. 223 is configured separately. In other words, one resin frame 224 is formed by integrally connecting both ends of the two sets of load roller passage components 221 and 221 and one end of the pair of direction change path inner circumferential guide components 222 and 222, and each relief frame 224 is formed. The connecting portion between the both ends of the passage forming portion 223 and the inner circumference guiding forming portions 222, 222 of the direction changing path can be divided and assembled into the block main body 213.

The load roller passage components 221 and 221 on the upper surface side of the track rail 202 and the load roller passage components 221 and 221 adjacent to the load roller passage components 221 and 221 on the side surface are interposed via a thin connecting plate portion 226. And are integrally connected.

On the other hand, the direction-turning-path inner-peripheral guide constituting part 222
Is a thin plate portion 2 joined to an end face of the block body 213.
29 and are integrally formed.

The thin plate portion 229 includes a first end plate portion 230 joined to the end surface of the horizontal portion 206 of the block main body 213, a third end plate portion 232 joined to the end surface of the sleeve portion 207, and an end surface of the block main body 213. A second end plate portion 231 is provided at a corner of the horizontal portion 206 and the sleeve portion 207 and connects the first end plate portion 230 and the third end plate portion 232.

The inner edge of the first end plate 230 located on both end surfaces of the block body 213 and the third end plate 232
A pair of load roller passage forming portions 221 and 221 located on both side edges of the roller rolling groove 208 are integrally connected to the inner end edge of the connecting plate portion 226, respectively. Both ends are integrally connected.

Each of the turn-around path inner circumferential guide components 222 has a half-cylindrical cylindrical shape, and an inner circumferential guide groove 210a having a rectangular cross section which forms an inner circumferential guide portion of the turn-direction path 210 is formed on the outer periphery thereof. One end of the bottom surface of the inner circumferential guide groove 210a is connected to the end of the roller rolling surface 208, and the roller rolling surface 2
08 and the roller rolling surface 208
Is positioned so as to coincide with the end position of. The other end of the inner circumferential guide groove 210a is connected to the end of the roller escape passage 229, and is formed into the same cross-sectional shape as the roller escape passage 209 so as to coincide with the end position of the roller escape passage 209. Is positioned.

[0142] The groove side edge of the inner peripheral guide groove 210a has
The cylindrical edge portion 23 having a width larger than the width of the belt portion 212b
3 are provided. The cylindrical edge portion 233 cooperates with a side cover 240 described later, and the groove edge side of the inner peripheral guide groove 210a forms a guide groove 210c of the roller holding band 212.

One end of the inner circumferential guide groove 210 a of the direction change path 210 is connected to the roller rolling surface 208 so that
The third end plate portions 230 and 232 extend to the contact surface side with the end surface of the block body 213. On the other hand, a step 222a corresponding to the thickness of the thin plate portion 229 is formed at the other end of the inner circumferential guide groove 210a of the direction change path 210 up to the end surface of the thin plate portion 229 on the side opposite to the block body 13, and a resin is formed. The end of the pipe half on the inner peripheral side protrudes from the end surface of the block body 13 by the thickness of the thin plate portion 229, and the thin plate portion 229 is formed.
Is engaged with the step portion 222a.

On the other hand, the ends of the pipe half 223a on the outer peripheral side of the resin pipe 223 forming the roller escape passage 209 are fitted into the first and third end plates 230 and 232 of the thin plate portion 229. Semicircular pipe fitting holes 234 and 234 are provided. The resin pipe 223 is a block body 213
The roller escape passage 209 is mounted on the inner periphery of the resin pipe 223.

As shown in FIG. 20, the resin pipe 223 comprises an inner peripheral pipe half 223a which is continuous with the direction changing path inner peripheral guide groove 210a, and a direction changing path 2 of the side cover 240.
And an outer peripheral pipe half 223b that is continuous with the outer peripheral guide groove 210b. Inner circumference pipe half 2
23a includes an inner circumferential groove 209a having a rectangular cross section, and a side end surface 223b extending in the longitudinal direction along both side edges of the inner circumferential groove 209a. This inner peripheral pipe half 2
The longitudinal end face portion 223c of 23a is formed to have the same width as the width of the cylindrical edge portion 233 of the top portion 228.

The outer pipe half 223b is connected to the side lid 240.
And a linear member having the same rectangular cross section as the outer circumferential guide groove 210b, and an outer circumferential groove portion 209b continuous with the outer circumferential guide groove 210b, and a side end surface extending longitudinally along both side edges of the outer circumferential groove portion 209b. 223d.
Further, the outer end of the side end surface 223d is in contact with the side end surface 223c of the inner peripheral pipe half 223a to be in contact with the roller holding band 21.
Jetty 223e forming a guide groove of the second belt portion 212b
Is provided.

The inner pipe half 22 of the resin pipe 223
The length of the block 3a is equal to the length of the block body 213, and is positioned in the longitudinal direction by abutting on the end face of the direction changing path inner circumference guiding component 222 on the block body 213 side.

On the other hand, the length of the outer pipe half 223b of the resin pipe 223 is larger than the length of the block main body 213, and the thickness of the first and third end plate portions 230 and 232 of the thin wall portions 229 at both ends of the block main body 213. It is longer by the length and is fitted in the fitting hole 234 of the first and third end plate portions 230 and 232. Both end surfaces of the outer peripheral pipe half 223b fitted in the fitting holes 234 abut against the peripheral edge of the end of the direction change path outer peripheral guide groove 210b of the side cover 240, and positioning in the longitudinal direction is performed.
In addition, the jetty 223e formed on the longitudinal end surfaces 223 at both ends of the outer pipe half 223b abuts on the cylindrical edge 233 on the side of the inner guide groove 210a of the turning path inner guide component 222, As a result, the outer pipe half 223b and the inner pipe half 223a inserted into the through hole 214 are prevented from rotating.

As described above, the resin pipe 223 and the guide member 222 for turning the inner circumference of the turning path are accurately formed through the fitting holes 234 formed in the first and third end plates 230 and 232 of the thin plate portion 229. It is positioned and assembled.

On the other hand, the side cover 240 is provided with four concave portions 241 provided with a turning direction outer periphery guiding portion 210b into which the top portion 228 of the turning direction inner circumference guiding portion 222 is fitted, and the side cover 240. And a fastening portion for fastening to the block body 213. The fastening portion is provided with a bolt 24 through a bolt insertion hole 243 formed in the side cover 240.
4 is inserted and screwed into a bolt hole 245 formed in the end surface of the block main body 213 to be fixed by tightening. The position of the bolt insertion hole 243 is located between the first and third end plate portions 230 and 232 of the thin plate portion 229.

The turn-around path inner circumferential guide portion 222 in which the turn-around path inner circumferential guide groove 210a is formed is fitted into the concave portion 241 of the side cover 240, and the thin plate portion 229 is connected to the side cover 240 by the tightening force. It is sandwiched and fixed between the end faces of the main body 213.

By connecting the turning path inner circumferential guide portion 222 and the load roller passage forming portion 221 via the thin plate portion 229, one end of the turning path inner circumferential guide groove 210a and the load roller passage forming portion 221 are connected. Relative positional relationship or direction change path inner circumferential guide groove 10a and roller escape passage 209
Is accurately positioned.

On the other hand, since the thin plate portion 229 is pressed against the flat end surface of the block main body 213 by the side cover 240 by the tightening force of the side cover 240, the attitude (direction) of the direction-turning path inner peripheral guide forming portion 222 is distorted. Even in this case, the distortion is corrected by the bending of the thin plate portion 229.

Further, the thin plate portion 229 is firmly fixed by the tightening force of the side cover 240, and there is no displacement of the direction changing path inner circumferential guide groove 210a.

Next, an example of changing the dividing position of the resin circulation path molded body 220 will be described.

In the following description of the modified example, only the changed points will be described, and the same components as those in the second embodiment will be denoted by the same reference numerals and description thereof will be omitted.

[First Modification] FIGS. 21 and 22 show a first modification of the resin circuit molded body 220 of the second embodiment.

In the first modification, the resin circulation path molded body 22
The first resin frame is formed by integrally joining the load roller passage components 221 and 221 and the resin pipe 223 as an escape passage component at one end thereof to one direction change path inner circumference guide component 222A. 220A, and a second resin frame 220B provided with the other direction change path inner circumference guiding component 222B as a separate component.

In this case, the load ball passage forming part 221
As in the second embodiment, the integral joining of the 221 and the direction-turning-path inner-peripheral guiding component 222 is integrally formed via a thin plate portion 229A.

On the other hand, the direction changing path inner peripheral guide portion 222 and the resin pipe 223 are also integrally formed via the thin plate portion 229A. In this case, the resin pipe 223 is not formed in half, but is integrally formed as a round pipe. Accordingly, there is no fitting hole 234 in the thin plate portion 229A, and the roller escape passage 209 is directly opened.

Further, the first resin frame 220A and the second
The connection between the resin frames 220B of FIG.
As shown in (2), positioning is performed by uneven engagement such as in-row fitting. In the illustrated example, a locking concave portion 236 such as a dovetail groove is provided in the second resin frame 220B, and a locking convex portion 235 to be engaged with the locking concave portion 236 is provided in the load roller passage forming portions 221 and 221. I have.

In this case, the resin pipe 223 of the first resin frame 220A is connected to the through hole 214 of the block body 213.
Then, the load passage forming parts 221 and 221 and the connecting plate part 226 are inserted along the lower surface of the horizontal part 206 of the block main body 213 and the inner side surfaces of the sleeve parts 207 and 207.

The tip of the resin pipe 223 and the locking projections 35 provided at the free ends of the load passage forming parts 221 and 221 and the connecting plate part 226 are connected to the block body 21.
The second resin frame 22 applied to the other end face of the third resin frame 22
It is locked and fixed in a locking recess 236 formed in the thin plate portion 229B of 4B.

The locking projection 235 and the locking recess 236 are formed by the first
Of course, a locking concave portion may be provided on the resin frame 220A side and a locking convex portion may be provided on the second resin frame 220B side. Further, the present invention is not limited to such a locking concave portion and a locking convex portion, and any locking structure may be employed as long as the divided ends can be positioned and fixed.

[Modification 2] FIGS. 23 and 24 show a modification 2 of the resin circulation path molded body 220.

The second modification is different from the second embodiment in that
The load roller passage forming portion 221 and the escape passage forming portion 221 are integrated with the resin pipe 223 serving as the escape passage forming portion and the pair of direction change path inner circumferential guide forming portions 222, 222. It is divided into two in the middle of the direction. In other words, the load roller passage forming part 221 and the resin pipe 223 are divided into two parts at an intermediate position in the longitudinal direction, and the divided load roller passage forming part 221 and the resin pipe 223 are respectively guided in a pair of direction change path inner peripheral guides. The two resin frames 220C and 220D having the same shape are formed integrally with the constituent parts 222 and 222.

Then, the load roller passage forming portions 22 at both ends are formed.
1, 221; central connecting plate 226 and resin pipe 2
Locking projections 237 that engage with the projections and depressions at the divided ends
And a locking recess 238.

[Third Modification] FIGS. 25 and 26 show a third modification of the resin circulation path molded body 220.

In the third modification, the resin pipe 223 as the connecting portion having the relief passage structure of the first embodiment is omitted, and the load rolling element rolling path forming portion and the connecting plate portion 226 and the pair of direction changing paths are formed. The resin plate 20E is formed by integrally molding the thin plate portions 229, 229 provided with the inner peripheral guide components 222, 222. The roller escape passage 209 is constituted by a through hole itself formed in the block body 213.

In this case, for example, the roller escape passage 20
9 is connected to the chamfered portion 215 provided at the opening edge of the roller escape passage 209 at the opening edge of the roller hole 239 of the thin plate portion 229.
The connection may be made by providing an engagement projection 239a that engages with.

Further, in the illustrated example, the connection edge of the direction changing path outer peripheral guide groove 210b of the side cover 240 with the roller escape path 209 is fitted into the ball hole 239 of the thin plate portion 229, and the ball escape path 209 And a semicircular engaging protrusion 248 that engages with the chamfered portion 215 at the opening edge of the opening.

[Modification 4] FIG. 26 shows a modification 4 of the resin circulation path molded body 220.

In the fourth modified example, the resin pipe 223 of the third modified example is omitted, and the load roller passage forming portion 221 is formed.
The resin frame 220F is integrally formed with the one direction change path inner circumference guide component 222 to form a resin frame 220F, and the resin frame 220G provided with the other direction change path inner circumference guide configuration portion 222 is formed separately. 235 and the engaging concave portion 236 are positioned and fixed by engaging the concave and convex portions. Other configurations are exactly the same as those of the third modification.

[Modification of Roller Row] In the above-described second embodiment and the first to fourth modifications, the case where the roller row is provided with two rows on the upper surface of the track rail 2 and one row on each side surface, that is, a total of four rows is described. However, as shown in the drawing, other roller row configurations can be applied as a matter of course, and all the patterns of the above embodiment can be applied as the division positions of the resin circulation path molded body.

In the example shown in FIG. 27, four rows of rollers 203 as rolling elements are provided between the left and right side surfaces of the track rail 202 and the inner side surfaces of the left and right sleeve portions 207 and 207 of the moving block 204, two upper and lower rows. .

Also in this case, the turning direction inner circumference guiding component 222 can be configured such that four turning direction inner circumference guide portions 210a corresponding to the four rows of balls 203 are integrally connected.

In the above description, the present invention has been described by taking as an example a linear motion guide device in which a moving block is assembled via a rolling element to a track rail as a track axis. However, as described below, a spline as a track axis is used. The present invention is also applicable to a so-called ball spline in which an outer cylinder as a moving member is fitted to a shaft.

[Embodiment 3] A ball spline 301 shown in FIG. 28 to FIG. 30 is a so-called angular ball spline, and includes a spline shaft 302 as a track member extending linearly and a large number of balls along the spline shaft 302. And an outer cylinder 304 movably provided via a ball 303 as a rolling element.

The spline shaft 304 is a long body having a quadrangular cross section, and has a total of six ball rolling grooves 3 on the side surfaces of three corners 306 protruding from the outer periphery of the spline shaft 302, two in total.
305; 305; 305; 305 are provided.

On the inner periphery of the outer cylinder 304, the spline shaft 30
The two recesses 307 corresponding to the respective corners 306 are provided at three places, and correspond to the ball rolling grooves 305 at both corners in the circumferential direction of the recess 307 facing the side surface of the corner 306. Ball rolling grooves 308 are provided. Further, the outer cylinder 304 has six ball rolling grooves 308, 3
08; 308, 308; six ball escape passages 309, 309; 309, 3 provided in parallel with 308, 308.
09; 309, 309 and the ball rolling grooves 308, 3
08; 308, 308; 308, 308 and ball escape passages 309, 309; 309, 309;
0; 310, 310; 310, 310, thereby forming six circulation paths.

The center of the spline shaft and the radial line passing through the center of the corner are defined by the contact angle line connecting the contact points of the balls located on both sides of the corner of the spline shaft 302 with the corresponding ball rolling grooves. The contact angle α that is formed is relatively large. The ball escape passage 3 extends in the direction of the contact angle line.
09 is located.

In this embodiment, a large number of balls 303 inserted into each circulation path are connected in series via a ball holding band 312, and move around in each circulation path while being guided by the ball holding band 312. It has become. This ball holding band 312 is exactly the same as that shown in FIG.

The outer cylinder 304 is provided with ball rolling grooves 308, 30
8; 308, 308; an outer cylinder main body 313 provided with 308, 308; three resin circulation path molded bodies 320, 320, 320 made of resin incorporated in the outer cylinder main body 313; , 320, and 320, and a pair of side lids 314 and 314 attached to the end surface of the block main body 313.

In this embodiment, three resin circulation path molded bodies 320, 320, 320 provided with two of the six circulation paths are provided.
320.

Each circulation path 31 of each resin circulation path molded body 320
1 is a pair of load ball passage components 321 and 321 extending along both side edges of the ball rolling groove 308, and a pair of direction change path inner peripheral guide components 322 and 322 provided on both end surfaces of the outer cylinder body 313, respectively. And a resin pipe 323 as an escape passage component inserted into a through hole formed through the outer cylinder main body 313.

In the load ball passage forming portions 321 and 321, the belt portion 31 of the ball holding band 312 in the load region is provided.
A guide groove for guiding the side edge of the ball 2b is provided in a straight line so as to prevent the ball 303 from oscillating when the ball 303 rolls.
When the ball retaining band 312b is removed from the belt holding band 312b, the side edge of the belt portion 312b is hooked on the jaw constituting the guide groove to prevent the ball holding band 312 from hanging down. The ball 303 itself is held by the ball holding band 312, and the ball 303
Are held so as not to fall off the outer cylinder 304 via the ball holding band 312 held by the holding portion.

In the direction change path 310 and the ball escape path 309 in the no-load area, guide grooves 310c and 309c for guiding the side edge of the belt portion 312b are formed all around the guide groove in the load area. ing.

In each resin circulation path molded body 320, a connection between the load ball passage forming parts 321 and 321 and the pair of direction change path inner peripheral guide forming parts 322 and 322 is integrally formed, and the other parts are formed. It is divided so that it can be incorporated into the outer cylinder main body 313. In this embodiment, one resin frame 324 is formed by integrally connecting both ends of four sets of load ball passage components 321 and 321 and one ends of a pair of direction change path inner peripheral guide components 322 and 322. , And both ends of each escape passage forming part 323 and the inner circumferential guiding parts 322, 3
The connection portion 22 can be divided and incorporated into the block body 313.

Each of the load roller passage forming parts 321 and 321;
321 and 321 adjacent to each other are integrally connected via a thin connecting plate portion 326. On the other hand, the direction changing road inner circumference guide component 32
2 is a thin plate portion 32 joined to the end face of the outer cylinder main body 313.
9 and is integrally formed.

The thin plate portion 329 is connected to the direction first end plate portion 33.
0, 330 and the second end plate 2 connecting each end plate 330
31. The pair of load ball passage components 321 and 321 are integrally connected to the inner edge of the first end plate 230, and both ends of the connecting plate 326 are connected to the inner edge of the second end plate 331, respectively. They are integrally connected.

Each turning path inner peripheral guide forming portion 322 is a half-cylindrical shape, and has an inner circumferential guiding groove 310a having an arc-shaped cross section which constitutes the inner guiding section of the turning path 310. The inner circumferential guide groove 310a is provided with a ball rolling groove 308.
Are formed in the same cross-sectional shape as the ball rolling groove 308, and are positioned so as to coincide with the end position of the ball rolling groove 308. Also, the inner circumferential guide groove 3
The other end of the ball escape passage 329 is connected to the end of the ball escape passage 329, is formed into the same cross-sectional shape as the ball escape passage 309, and is positioned so as to coincide with the end position of the ball escape passage 309.

Further, the groove side edge of the inner peripheral guide groove 310a
The cylindrical edge portion 33 having a width larger than the width of the belt portion 312b.
3 are provided. The cylindrical edge portion 333 cooperates with a side cover 340 described later, and a groove edge side of the inner peripheral guide groove 310 a forms a guide groove of the ball holding band 312.

Both ends of the inner circumferential guide groove 310a of the direction change path 310 are connected to the ball rolling groove 308 and the ball escape passage 30.
In order to connect to both ends of the first end plate 9, the first end plate portion 230 extends to the contact surface side with the end surface of the outer cylinder body 313.

On the other hand, the first and third end plate portions 330 and 331 are provided with a resin pipe 323 forming a roller escape passage 309.
Are provided with semicircular pipe fitting holes 334, 334 into which the ends of the pipe half 323a on the outer peripheral side are fitted. The resin pipe 323 is mounted in a circular through hole 314 formed in the outer cylinder main body 313, and forms a ball escape passage 309 by the inner circumference of the resin pipe 323.

The resin pipe 323 has an inner peripheral pipe half 323a which is continuous with the direction changing path inner peripheral guide groove 310a.
An outer peripheral side guide half 310b of the direction change path 310 of the side cover 340 and an outer peripheral side pipe half 323b. The inner peripheral pipe half 323a includes an inner peripheral groove 309a having an arc-shaped cross section, and side end surfaces 323c extending longitudinally along both side edges of the inner peripheral groove 309a.
The side end surface 323c of the inner peripheral pipe half 323a is formed to have the same width as the width of the cylindrical edge 333 of the direction changing path inner peripheral guide component 322.

The outer pipe half 323b is connected to the side lid 340.
The outer circumferential groove 309b is continuous with the outer circumferential guide groove 310b, and a side end surface extending in the longitudinal direction along both side edges of the outer circumferential groove 309b. 323d.
Further, the outer end of the side end surface 323d is in contact with the side end surface 323c of the inner peripheral pipe half 323a so as to contact the ball holding band 31.
Jetty 323e forming a guide groove of the second belt portion 312b
Is provided.

The inner pipe half 32 of the resin pipe 323
The length of the outer cylinder body 313 is equal to the length of the outer cylinder body 313, and is positioned in the longitudinal direction by contacting the end surface of the direction changing path inner circumference guiding component 322 on the side in contact with the outer cylinder body 313.

On the other hand, the length of the outer pipe half 323b of the resin pipe 323 is smaller than the length of the outer cylinder main body 313, so that the first end plate sections 330, 3 of the thin plate sections 329 at both ends of the outer cylinder main body 313 are provided.
It is longer by the thickness of 30 and is fitted in the fitting hole 334 of the first end plate portion 330, 330. Both end surfaces of the outer pipe half 323b fitted into the fitting holes 334 abut against the peripheral edge of the end of the direction change path outer guide groove 310b of the side cover 340, and positioning in the longitudinal direction is performed. Also, a ridge 323e formed on the longitudinal end surfaces 323 at both ends of the outer peripheral pipe half 323b abuts on the outer edge of the cylindrical edge 333 of the turning path inner peripheral guide component 322 to form a guide groove. Thus, the outer peripheral pipe half 323b and the inner peripheral pipe half 323a inserted into the through hole 314 are prevented from rotating.

As described above, the resin pipe 323 and the direction change path inner circumferential guide component 322 serve as the roller escape passage component.
Are accurately positioned and assembled through fitting holes 334, 334 formed in the first end plate portions 330, 330 of the thin plate portion 329.

[0200] On the other hand, the side cover 340 is provided with the turn guide outer peripheral guide portion 31 into which the turn guide inner circumferential guide portion 322 is fitted.
0b, and a fastening portion for fastening and fixing the side cover 340 to the outer cylinder body 313. The fastening portion is fastened and fixed by inserting a bolt 344 into a bolt insertion hole 343 formed in the side cover 340 and screwing it into a bolt hole 345 formed on an end surface of the outer cylinder main body 313. Bolt insertion hole 34
The position of 3 is the first end plate portion 330, 33 of the thin plate portion 329.
It is located between 0.

The direction change path inner circumference guiding component 322 is
The thin plate portion 329 is fixed between the side lid 340 and the end surface of the outer cylinder main body 313 by a fastening force.

[0202] One end of the direction changing path inner peripheral guide groove 310a and the load ball path forming part 321 are connected to each other by connecting the direction changing path inner circumference guiding portion 322 and the load ball passage forming portion 321 via the thin plate portion 329. Relative positional relationship or direction change path inner circumferential guide groove 310a and ball escape path 309
Is accurately positioned.

On the other hand, the thin plate portion 329 is flattened by the side cover 340 by the tightening force of the side cover 340.
3, even when the attitude (direction) of the direction-turning path inner circumference guide component 322 is distorted, the deflection of the direction-turning path inner circumference guide component 322 is caused by the bending of the thin plate portion 329.
Is corrected.

Further, the thin plate portion 329 is firmly fixed by the tightening force of the side cover 340, and there is no displacement of the direction changing path inner circumferential guide portion 310a.

According to the present invention, only the ball rolling groove 308 in the load region of the circulation path 311 is constituted by the high rigidity outer cylinder main body 313, and the other part is constituted by the resin circulation path molded body 320 made of resin. Therefore, the outer cylinder body 313 itself only needs to precisely process the ball rolling groove 308, and the number of processing steps is reduced, thereby satisfying the low cost requirement.

Even if the outer cylinder 304 is large, the resin circulation path molded body 320 is separate from the outer cylinder main body 313, so that the outer cylinder main body 313 and the resin circulation path molded body 320 are integrally molded. The runner is not limited by the outer cylinder body 313, and the runner can be sufficiently secured by increasing the number of gates, and the moldability is good. Especially the ball rolling groove 30
Since the load ball passage forming portions 321 and 321 at the groove side edge of the groove 8 are thin and hard to run around, it is effective to adopt a separate structure from the outer cylinder main body 313 as in the present embodiment.

The load ball passage forming parts 321 and 32
1 and the connecting portion of the direction-turning-path inner-peripheral guide forming portion 322 are continuously and integrally formed, and the divided portion is also fitted and positioned and fixed in the divided portion, so that the continuity of the connecting portion of the circulation path is possible. And the ball rolling grooves 305, 308
Ball 3 from the load ball path between
03, or the movement of the ball 303 from the direction change path 310 to the ball escape path 309 is smoothly performed. Next, an example of changing the division position of the resin circulation path molded body 320 will be described.

In the following description of the modified example, only the changed points will be described, and the same components as those in the third embodiment will be denoted by the same reference numerals and description thereof will be omitted.

[First Modification] FIGS. 31 and 32 show a first modification of the resin circulation path molded body 320.

In the first modification, the resin circulation path molded body 32
A first resin frame is formed by integrally joining the load ball passage components 321 and 321 and the resin pipe 323 as an escape passage component at one end thereof to one direction change path inner circumferential guide component 322A. 320A, and a second resin frame 320B provided with the other direction change path inner circumference guiding component 322B as a separate component.

In this case, the load ball passage forming parts 321,
As in the third embodiment, the integral joining of the 321 and the direction-turning-path inner-peripheral guide component 322 is integrally formed via a thin plate portion 329A.

On the other hand, the direction changing path inner circumferential guide portion 322 and the resin pipe 323 are also integrally formed via the thin plate portion 329A. In this case, the resin pipe 323 is not formed in half, but is integrally formed as a round pipe. Therefore, there is no fitting hole 334 in the thin plate portion 329A, and the ball escape passage 309 is directly opened.

The first resin frame 320A and the second
The connection between the resin frames 320B of FIG.
As shown in (2), positioning is performed by uneven engagement such as in-row fitting. In the illustrated example, a locking concave portion 336 such as a dovetail groove is provided in the second resin frame 320B, and a locking convex portion 235 to be engaged with the locking concave portion 336 is provided in the load roller passage forming portions 321 and 321. I have.

In this case, the resin pipe 323 of the first resin frame 320A is inserted into the through hole 314 of the outer cylinder main body 313, and the load passage forming parts 321 and 321 and the connecting plate part 3
26 is inserted along the inner peripheral surface of the recess 307 of the outer cylinder main body 313.

The tip of the resin pipe 323 and the locking projections 335 provided at the free ends of the load passage forming portions 321 and 321 and the connecting plate portion 326 are connected to the outer cylinder main body 313.
Second resin frame 324 applied to the other end face of
B is locked and fixed in a locking concave portion 336 formed in the thin plate portion 329B.

The locking projection 335 and the locking recess 336 are formed by the first
Of course, a locking concave portion may be provided on the resin frame 320A side and a locking convex portion may be provided on the second resin frame 320B side. Further, the present invention is not limited to such a locking concave portion and a locking convex portion, and any locking structure may be employed as long as the divided ends can be positioned and fixed.

[Modification 2] FIGS. 33 and 34 show a modification 2 of the resin circulation path molded body 320.

In the second modification, the resin circulation path molded body 320
The load ball passage forming portion 321 and the escape pipe forming portion 323 are integrated with the resin pipe 323 serving as the escape passage forming portion and the pair of direction change path inner circumferential guide forming portions 322 and 322. It is divided into two in the middle of the direction. In other words, the load ball passage forming portion 321 and the resin pipe 323 are divided into two parts at the middle position in the longitudinal direction, and the divided load ball passage forming portion 321 and the resin pipe 323 are respectively guided in a pair of direction change path inner circumferential guides. The two resin frames 320C and 320D having the same shape are formed integrally with the constituent parts 322 and 322.

Then, the load ball passage forming portions 32 at both ends are formed.
1,321, central connecting plate 326 and resin pipe 3
Locking projections 337 which engage with the projections and depressions at the divided ends
And a locking recess 338.

[Third Modification] FIG. 35 shows a third modification of the resin circulation path molded body 320.

In the third modification, the resin pipe 323 as the connecting portion having the relief passage structure of the first embodiment is omitted, and the load rolling element rolling path forming portion and the connecting plate portion 326 and the pair of direction change paths are provided. The resin frame 320E is formed by integrally molding the thin plate portions 329, 329 provided with the inner peripheral guide components 322, 322. Ball escape passage 309
Is constituted by a through hole itself formed in the outer cylinder main body 313.

In this case, for example, the ball escape passage 30
9 is connected to the opening edge of the ball hole 339 of the thin plate portion 329, the chamfered portion 315 provided at the open end of the ball escape passage 309.
It is only necessary to provide an engagement projection 339a that engages with and connect them.

In the illustrated example, a semicircular engaging projection 348 that engages with the thin plate portion 329 is provided at the connection edge of the direction changing path outer peripheral guide groove 310b of the side cover 340 with the ball escape path 309. Have been.

[Fourth Modification] FIG. 36 shows a fourth modification of the resin circulation path molded body 320.

In the modified example 4, the resin ball 323 of the modified example 3 is omitted, and the load ball passage forming portion 321 is formed.
The resin frame 320 </ b> F is formed by integrally molding the one direction change path inner circumference guide component 322 and the other resin frame 320 </ b> G provided with the other direction change path inner circumference guide component 322. 335 and engagement recess 336 are positioned and fixed by engaging and recessing engagement. Other configurations are exactly the same as those of the third modification.

[Modified Example of Ball Row] In the above-described Embodiment 3 and its modified examples 1 to 4, a description has been given of the combination. However, as shown in the figure, it is naturally applicable to other roller row configurations. ,.

In the example shown in FIG. 27, a total of four rows of rollers 203 as rolling elements are provided between the left and right side surfaces of the track rail 202 and the inner side surfaces of the left and right sleeve portions 207 and 207 of the moving block 204. .

Also in this case, the turning direction inner circumference guiding component 222 can be configured such that four turning direction inner circumferential guide portions 210a corresponding to the four rows of balls 203 are integrally connected. In the above embodiment, the resin circulation path molded body is 2
Although three sets are integrally formed for each set, six sets may be provided separately for each circulation path, or all six may be integrally formed. 6
When all of them are integrally formed, they cannot be inserted from the inside to the outside of the outer cylinder main body, so that the division positions are the modes of Modifications 1, 2, and 4. [Modification of Ball Row of Third Embodiment] Seventh Embodiment
In the above description, the ball spline having an angular row of balls has been described. However, the present invention can naturally be applied to a radial ball spline as shown in FIG.
In the case of the radial type, the spline shaft has a round shaft shape without a corner portion, and has a cylindrical shape without a concave portion also on the inner periphery of the outer cylinder. The contact angle α is smaller than that of the angular type. As the dividing position of the resin circulation path molded body 320, all the five patterns of the third embodiment and the modified examples 1 to 4 can be applied.

In the illustrated example, the resin circulation path molded bodies 320 are separately provided for each of the six rows of balls, but two sets of each resin circulation path molded body may be integrated as in the above embodiment. Alternatively, all the six resin circulation path molded bodies may be integrally molded.

[Fourth Embodiment] FIGS. 38 and 39 show a fourth embodiment of the present invention. In the fourth embodiment, the present invention is applied to a roller spline using rollers as rolling element rows.

That is, the roller spline 401 shown in FIG. 38 is movably provided along a spline shaft 402 as a track member extending linearly and a number of rollers 403 as rolling elements along the spline shaft 402. And an outer cylinder 404.

The spline shaft 402 is a long shaft having an irregular cross section, and a total of six roller rolling surfaces 4 are provided, two on each side surface of three corners 406 protruding from the outer periphery of the spline shaft 402.
405, 405; 405, 405 are provided.

[0233] On the inner periphery of the outer cylinder 404, the spline shaft 40 is provided.
The two recesses 407 corresponding to the respective corners 406 are provided at three places, and the two circumferential corners of the recess 407 facing the side surfaces of the corners 406 correspond to the roller rolling surfaces 405 and 405. Roller rolling surfaces 408, 408 are provided. Furthermore, the outer cylinder 404 has six roller rolling surfaces 408, 4
08; 408, 408; 6 roller escape passages 409, 409; 409, 4 provided in parallel with 408, 408.
09; 409, 409 and the roller rolling surfaces 408, 4
08; 408, 408; 408, 408 and roller escape passages 409, 409; 409, 409;
0, 410, 410; 410 and 410, thereby forming six circulation paths.

A number of rollers 403 inserted in each circulation path
Are connected in series via a roller holding band 412 similar to the roller holding body 212 shown in FIG. 19, and are guided in the roller holding band 412 to make a ring movement in each circulation path.

The outer cylinder 404 is provided with roller rolling surfaces 408, 40
8, 408, 408; an outer cylinder main body 413 provided with 408, 408, three resin circulation path molded bodies 420, 420, 420 made of resin incorporated in the outer cylinder body 413, and the resin circulation path molded body 420 , 420, 420 and a pair of side lids 314, 314 attached to the end surface of the block body 413. In this embodiment, similarly to the third embodiment, two sets of six circulation paths are formed in three resin circulation path molded bodies 420, 420, 420.

Each of the resin circulation path molded bodies 420 has a pair of load roller passage forming parts 421 and 421 extending along both side edges of the roller rolling surface 408 and a pair of direction change parts provided on both end faces of the outer cylinder main body 413. Road inner circumference guide component 42
2, 422 and a resin pipe 42 as an escape passage component inserted into a through hole formed through the outer cylinder main body 413
3 is provided.

In the load roller passage forming portions 421 and 421, the belt portion 41 of the roller holding band 412
A guide groove for guiding the side edge of the roller 2b is provided in a straight line to prevent the roller holding band 412 from swaying when the roller 403 rolls, and the outer cylinder main body 413 is connected to the spline shaft 402.
When the roller holding band 412 is removed from the roller holding band 412, the side edge of the belt portion 412b is hooked on a jaw forming a guide groove to prevent the roller holding band 412 from hanging down. The roller 403 itself is held by a roller holding band 412,
Is held so as not to fall off from the outer cylinder 404 via the roller holding band 412 held by the holding section. The guide groove 4 for guiding the side edge of the belt portion 412b is also provided in the direction change path 410 and the roller escape path 409 in the no-load region.
09c and 410c are formed all around the guide groove 421a in the load area. When the roller holding band 412 is not used, the guide grooves 421a, 410a, and 409a are unnecessary, and the load roller passage forming portion 421 is provided with a jaw for holding the roller end as shown in FIG. Each of the resin circulation path molded bodies 420 includes the load roller passage forming parts 421 and 421 and the pair of direction changing path inner circumferential guiding parts 4.
At least one of the four connection portions with the connection portions 22 and 422 is integrally formed, and can be divided into other portions and incorporated into the outer cylinder main body 413. The basic form of the resin circulation path molded body used for the spline unit will be sufficiently described in Embodiment 3, and the configuration of the resin circulation path molded body used for the roller circulation path will be sufficiently described in Embodiment 2. Therefore, here, only the basic mode of the divided configuration of the resin circulation path molded body 420 will be briefly described with reference to FIG. FIG. 39A shows one resin frame 424 formed by integrally connecting both ends of four sets of load roller passage components 421 and 421 and one ends of a pair of direction change path inner peripheral guide components 422 and 422. Then, both ends of each of the escape passage components 423 and the inner peripheral guide components 422, 42
The connection portion 2 is divided so that it can be incorporated into the outer cylinder main body 413.

FIG. 39 (b) shows a resin circulation path molded body 420.
The first resin frame 420A is formed by integrally joining the load roller passage components 421, 421 and the resin pipe 423 as an escape passage component at one end thereof to one of the direction change path inner circumferential guide components 422A. And the second resin frame 420B provided with the other direction change path inner circumference guide component 422B is a separate component.

FIG. 39 (c) shows a resin circulation path molded body 420.
The load ball passage forming portion 421 and the escape passage forming portion 423 are integrated with the resin pipe 423 as the escape passage forming portion and the pair of direction change path inner circumferential guide forming portions 422 and 422. It is divided into two in the middle of the direction. In other words, the load roller passage forming portion 421 and the resin pipe 423 are divided into two parts at the middle position in the longitudinal direction, and the divided load ball passage forming portion 421 and the resin pipe 423 are respectively guided by a pair of inner circumferential guides. The two resin frames 420C and 420D having the same shape are integrally formed with the components 422 and 422.

FIG. 39 (d) omits the resin pipe 423 of FIG. 39 (a), and shows the load rolling element rolling path component and the connecting plate 326 and a pair of direction changing path inner peripheral guiding components 42.
The resin frame 420E is formed by integrally molding the thin plate portions 429, 429 provided with 2,342. The roller escape passage 409 is formed by a through hole itself formed in the outer cylinder main body 413. FIG. 39E shows the state shown in FIG.
The configuration in which the resin pipe 423 of FIG.
Are integrally formed to form a resin frame 420F, and a resin frame 420G provided with the other direction changing path inner circumferential guide forming portion 422 is formed separately. In FIGS. 39A to 39E, the locking structure of the divided portion is positioned and fixed by uneven engagement such as spigot fitting as described in the first to third embodiments.

[Fifth Embodiment] FIGS. 40 to 44 show a linear motion guide device according to a fifth embodiment of the present invention.

As shown in FIG. 40, the linear motion guide device 501 moves via a track rail 502 as a track member extending linearly and a number of balls 503 as rolling elements along the track rail 502. A movable block 504 provided freely.

The track rail 502 is a long body having a substantially rectangular cross section, and two track rolling grooves 505, 505, 505 and 505 are provided on the left and right side surfaces of the track rail 502, respectively. On the left and right sides of the track rail 502, the jetty 50
2a and 502a are provided.
a, 502a, the ball transfer grooves 505,
505; 505, 505 are provided.

The moving block 504 includes a track rail 502
A downwardly open U-shaped block having a horizontal portion 506 opposed to the upper surface of the rail, and sleeve portions 507 and 507 extending downward from the left and right sides of the horizontal portion 506 and facing the left and right sides of the track rail 502. It is composed by the body. Each of the ball rolling grooves 5 provided on the left and right side surfaces of the track rail 502 is provided on the inner surface of each of the sleeve portions 507 and 507.
05, 505; 505, 505, two ball rolling grooves 508, 508; 508, 508 are provided.

The left and right sleeves 5 of the moving block 504
07, 507 include ball rolling grooves 508, 508;
Ball escape passages 5 each extending in parallel with 8,508
09, 509; 509, 509 are formed to penetrate, and both left and right sleeves 507, 507 are provided at both ends in the length direction.
As shown in FIG. 44 (a), each ball rolling groove 508,5
08; 508, 508 and ball escape passages 509, 50
9; 509, 509, 509, 510 are provided. That is, both sleeve portions 507 and 5 of the moving block 504
In 07, a total of four infinite circulation paths are formed, two on the left and two on the left and right on which the ball 503 circulates.

In this embodiment, four rows of balls 50
3, 503; 503, 503 are connected in series via a ball holding band 512 as a rolling band holding body,
It is designed to circulate while being guided by the ball holding band 512.

The ball holding band 512 is shown in FIGS. 44 (c) to (e).
As shown in FIG.
12a, and a flexible belt portion 512b provided with a plurality of balls 503 and a spacer portion 512c interposed between the balls 503. The side edge of the belt portion 512b is
It protrudes outward beyond the outside diameter of 03.

The spacer portion 512c is provided with a holding recess 512d having a spherical crown shape corresponding to the spherical surface of each ball 503.
The holding recess 512d supports the ball 503 from both sides to prevent the ball 503 from falling off the belt portion 512b. In this embodiment, both ends of the belt portion 512b have an endless belt-like configuration that is not connected, but may have an endless configuration in which both ends of the belt portion 512b are connected.

As shown in FIG. 41, the moving block 504 includes a block body 513 provided with ball rolling grooves 508, 508, 508, 508, and a pair of left and right resin circulation path molded bodies 520 incorporated in the block body 513. , 52
0 and a pair of left and right resin circulation path molded bodies 520, 520
And a pair of side covers 540 (one side cover is omitted) attached to the end surface of the block main body 513 in which is incorporated.

The left and right resin circulation path moldings 520, 520 each constitute two infinite circulation paths and are symmetrical in the left-right direction.
20 and the other resin circulation path molded body 520
Is omitted.

That is, the resin circulation path molded body 520 includes load ball passage forming portions 521, 521 extending along both side edges of the ball rolling grooves 508, 508, and the block body 51.
3 and a resin frame 524 (see FIG. 42) in which a pair of direction change path inner circumferential guide components 522 and 522 provided on both end surfaces are integrated, and inserted into through holes 514 and 514 formed through the block main body 513. A pair of resin pipes 523 and 523 are provided as escape passage constituting parts (see FIG. 43). That is, the load ball passage forming section 52
1, 521 and a pair of direction change path inner circumference guide components 522,
A connection portion with the resin frame 522 is integrally formed to form an integrated resin frame 524, and the pair of resin pipes 523 and 523 can be incorporated separately into the block body 513.

As shown in FIG. 42, guide grooves for guiding the side edge of the belt portion 512b of the ball holding band 512 in the load region are provided in the load ball passage forming portions 521 and 521 in a straight line so that the balls 503 can be rolled. The movement of the ball holding band 512 at the time of moving is prevented, and
04 is removed from the track rail 502, the belt 5
The side edge of 12b is hooked on the guide groove 521a constituting the guide portion to prevent the ball holding band 512 from hanging down.

Also, a pair of load ball passage forming portions 521, 52 located on both side edges of each ball rolling groove 508, 508 are provided.
1; 521 and 521 are smaller than the ball diameter, and even when the ball holder 512 is not used, the load ball passage forming portions 521 and 521 make the ball 5 open.
03 is prevented from falling off.

The direction change roads 510 and 51 in the no-load region are also provided.
0 and the ball escape passages 509, 509 are also shown in FIG.
As shown in (a) and (b), the guide grooves 509c and 510c for guiding the side edge of the belt portion 512b are provided as guide grooves 521 in the load region.
It is formed over the entire circumference following a.

Load ball passage components 521, 521; 5
As shown in FIG. 42B, the first connecting plate portion 525 extends in the longitudinal direction of the block body 513 along the horizontal portion 506 of the block body 513 and the corners of the sleeve portions 507 and 507, as shown in FIG. A second connecting plate 526 extending in the longitudinal direction between the ball rolling grooves 508 and 508 on the inner periphery of each sleeve 507 of the block body 513, and the sleeve 50 of the block body 513.
7 and a pair of third connecting plate portions 527 extending in the longitudinal direction of the block body 513 along the lower end surface.

That is, the first connecting plate portions 5 facing each other
25 and the upper edge of the second connecting plate portion 526 are located on the groove side edges of the upper ball rolling groove 508 provided in each sleeve portion 507 to form the load ball passage forming portions 521 and 521. Further, the lower edge of the second connecting plate portion 526 and the upper inner edge of the third connecting plate portion 527 facing each other are formed on the groove side edges of the lower ball rolling grooves 508 provided on the inner side surfaces of the sleeve portions 507 and 507. And constitutes the load ball passage components 521 and 521.

On the other hand, as shown in FIGS. 44 (a), (b) and (f), the direction changing path inner peripheral guide component 522 and the load ball passage components 521 and 521 are integrated via a thin plate portion 529. The resin pipe 523 is molded and fitted in a fitting hole 534 provided in the thin plate 529 by inlay fitting and fixed in position.

The thin plate portion 529 is formed with protruding portions 522, 522 for guiding the inner circumference of the turning path corresponding to the two rows of balls 503, 503 on the side surface of the track rail 502.

The first, second and third connecting plate portions 525 to 525 are attached to the thin plate portions 529 at both ends of the block body 513.
527 are joined together to form one resin frame 524.
Is configured.

Each of the turning guides 522 has a half-cylindrical shape, and an inner guide groove 510a having an arc-shaped cross section which forms an inner guide of the turning guide 510 is formed on the outer periphery thereof. One end of the inner circumferential guide groove 510a is connected to the ball rolling groove 50.
8 is formed into the same cross-sectional shape as the ball rolling groove 508, and is positioned so as to coincide with the end position of the ball rolling groove 508. The other end of the inner circumferential guide groove 510a of the direction change path 510 is
09 is connected to the end of the ball escape passage 509.
, And is positioned so as to coincide with the end position of the ball escape passage 509.

Also, the groove side edge of the inner peripheral guide groove 510a has
The cylindrical edge 53 having a width larger than the width of the belt portion 512b.
3 are provided. The cylindrical edge portion 533 forms a holding band guide groove 510c of the ball holding band 512 in cooperation with a semicircular step concave portion provided on the inner periphery of a concave portion of the side cover 540 described later.

Both ends of the inner circumferential guide groove 510a of the direction change path 510 are provided with the ball rolling groove 508 and the ball escape path 50a.
In order to connect to both ends of the block 9, the thin plate portion 529 extends to the contact surface side with the end surface of the block body 513. On the other hand, the thin plate portion 529 is provided with semicircular pipe fitting holes 534 and 534 into which the ends of the resin pipe 523 are fitted.

As shown in FIG. 43, the resin pipe 523 is connected to the outer circumferential guide groove 510 of the direction changing path 510 of the side lid 540.
b, an outer peripheral pipe half 523b located on the outer peripheral side of the circulation path that is continuous with b, an inner peripheral pipe half 523a located on the outer peripheral side of the circulation path that is continuous with the inner peripheral guide groove 510a, and
It is composed of

The inner pipe half 523a is shown in FIG.
As shown in (c) and (d), a groove 509 having an arc-shaped cross section is used.
a, and a side end surface 523c extending in the longitudinal direction along both side edges of the groove 509a. As shown in FIGS. 43 (a) and 43 (b), the outer pipe half 523b is a linear member having the same arc-shaped cross section as the direction change path outer guide groove 510b of the side cover 540. The groove 509b includes a groove 509b that is continuous with the groove 10b, and a side end surface 523d that extends in the longitudinal direction along both side edges of the groove 509b. Further, on the outer edge of the side end face 523d, there is provided a jetty 523e which abuts on the outer edge of the side end face of the inner peripheral pipe half 523a to form the holding band guide groove 509c of the ball holding band 12.

The inner pipe half 52 of the resin pipe 523
The length of the block 3a is equal to the length of the block body 513, and is positioned in the longitudinal direction by abutting against the back surface of the turning path inner circumference guiding component 522.

On the other hand, the length of the outer pipe half 523b of the resin pipe 523 is longer than the length of the block body 513 by the thickness of the thin plate portion 529, and is fitted into the fitting hole. Outer peripheral pipe half 523b fitted in fitting hole 34
Both end surfaces of the side cover 540 are provided with the outer peripheral guide groove 510b of the direction change path.
Is positioned in the longitudinal direction by abutting the peripheral edge of the end portion. In addition, the jetty formed on both side edges of the outer pipe half 523b abuts on the outer edge of the cylindrical edge portion 533 formed on the turning path inner circumference guiding component 522 to guide the guide groove 510.
c and an outer pipe half 523b and an inner pipe half 5 inserted into the through-hole 514.
23a is prevented from rotating.

As described above, the resin pipe 523 and the direction-turning-path inner-peripheral guide forming portion 522 are accurately positioned and assembled through the fitting holes 534 formed in the thin plate portion 529.

On the other hand, the side cover 540 is provided with the parts shown in FIGS.
As shown in FIG. 5, a stepped concave portion 540a in which the thin plate portion 529 is fitted, and a direction change path outer circumferential guide groove 510b as a direction change path outer circumferential guide portion in which the direction change path inner circumferential guide component 522 is fitted. It has a concave portion 541 provided and a fastening portion for fastening the side lid 540 to the block body 513. The fastening portion is fastened and fixed by inserting a bolt (not shown) into a bolt insertion hole 543 formed in the side cover 540 and screwing it into a bolt hole 545 formed on an end surface of the block body 513. The positions of the bolt insertion holes 543 are determined by the respective resin circulation path molded bodies 520 and 52.
It is provided at four places: a thin plate portion 529, 529 between the zero direction change path inner circumference guide components 522, 522 and a position near the left and right thin plate portions 529, 529 of the horizontal portion 506.

Guide groove 510 on the outer circumference of the turning direction of the recess 541
As shown in FIG. 44 (g), the side edge of FIG.
(f) a semi-circular large-diameter step portion 546 which forms a holding band guide groove 510c in cooperation with the cylindrical edge portion 533 of the turning path inner peripheral guide forming portion 522 shown in FIG. A small-diameter step portion 547 into which the portion 533 is fitted is provided. And
The turning path inner circumference guide component 522 in which the turning path inner circumference guide groove 510a is formed is fitted into the recess 541 of the side cover 540, and the thin plate portion 5 is inserted into the step recess 546 of the side cover 540.
The thin plate portion 529 is sandwiched and fixed between the side cover 540 and the end surface of the block body 513 by the tightening force.

By connecting the turning path inner peripheral guide 522 and the load ball passage forming section 521 via the thin plate portion 529, the turning path inner peripheral guide provided on the turning path inner peripheral guide 522 is provided. The relative positional relationship between one end of 510a and the load ball passage components 521 and 521, or the positional relationship between the direction changing path inner peripheral guide 510a and the ball escape passage 509 is accurately positioned.

On the other hand, the thin plate portion 529 around the direction-turning-path inner-peripheral guide portion 522 is pressed by the side cover 540 against the evenly flat end surface of the block body 513 by the tightening force of the side cover 540 (FIG. 44 (f)). (See dash-dot line),
Even when the orientation (direction) of the direction changing path inner circumferential guide 528 is distorted, the thin plate portion 529 is bent following the end surface of the block body 513, and the distortion of the direction changing path inner circumferential guide 522 is corrected.

Further, the thin plate portion 529 is firmly fastened and fixed by the fastening force of the side cover 540, and there is no displacement of the direction changing path inner circumferential guide portion 510a due to the frictional force.

[0273] The side cover 540 is attached to the direction changing path inner circumferential guide 522 assembled to the block body 513.
40 is fixed by fitting the recess 541 of the side cover 5.
40 is accurately positioned and fixed with respect to the block main body 513 by the concave and convex fitting with the direction changing path inner peripheral guide portion 522.

Next, a procedure for assembling the resin circulation path molded body 520 will be described.

First, the inner peripheral pipe halves 523a, 523a of the resin pipes 523, 523 are inserted into the through holes 514, 514 of the sleeve 507 of the block body 513.

Next, the integrally molded resin frame 524
The thin plate portions 529 at both ends are connected to the sleeve portions 50 of the block body 513.
7 Insert from the inner surface side while sliding along the end surface.
The first connecting plate 525 of the resin frame 524 is
6 and the corner portion of the sleeve portion 507 so as to be positioned vertically, and the second connecting plate portion 526 and the third connecting plate portion 527 of the resin frame 524 are connected to the sleeve portion 5 of the block body 513.
07, and each of the load ball passage components 52
1, 521; 521, 521 and the direction change path inner circumference guide components 522, 522 are positioned. At this time, the fitting holes 534 and 534 of the thin plate portions 529 and 529 match the through holes 514 and 514 of the block body 513.

Next, the outer pipe half 523b, 523b is inserted through the fitting holes 534, 534 into the through holes 514, 532.
14 to complete the incorporation of the one resin circulation path molded body 520.

Similarly, the other resin circulation path molded body 520
Do the incorporation of.

Thereafter, one side cover 540 is fastened and fixed to one end face of the block body 513, and after inserting a ball holding band 512 (not shown), the other side cover 540 is fastened and fixed to the other end face of the block body 513. Moving block 5
04 is completed.

According to the present invention, even when the moving block 504 is large, the resin circulation path molded bodies 520, 520 are separate from the block main body 513, so that the block main body 51
As in the case where the resin circulation path moldings 3 and the resin circulation path molded bodies 520 are integrally molded, the run of the melt is not limited by the block body 513, and the run can be sufficiently secured by increasing the number of gates, and the moldability is good. In particular, since the load ball passage forming portions 521 and 521 on the groove side edges of the ball rolling grooves 508 are thin and hard to melt, it is effective to adopt a separate structure from the block body 513 as in the present embodiment. It is.

Particularly, since the resin circulation path molded bodies 520, 520 constituting the two endless circulation paths on the left and right are divided into two on the left and right, even if the width of the moving block main body 513 is large, it is possible to remove the hot water. Can be secured.

Further, since a continuous circulation path is formed by the resin circulation path molded body 520, the inner circumferential guide groove 5
The relative positional relationship between 10a and the load ball passage components 521 and 521, and the relative positional relationship between the direction changing path inner circumferential guide groove 510a and the ball escape passage 509 are directly determined.
The continuity of the circulation path can be ensured, and a smooth transition of the ball 503 is ensured.

The relative positional relationship between the inner circumferential guide groove 510a and the load ball passage components 521 and 521 is such that the load ball passage components 521 and 521 have the ball rolling grooves 508.
Are located on both side edges of the turn guide path inner circumferential guide groove 510.
This corresponds to the side edge position of a.

The relative positional relationship between the inner guide groove 510a of the turning path and the ball escape passage 523 is determined by the relationship between the inner guide groove 510a of the turning path and the inner groove 52 of the ball escape path 509.
3a will match.

In particular, since the connecting portions of the load ball passage forming portions 521 and 521 in which the direction of the ball 503 changes and the turning path inner circumferential guide forming portion 522 are integrally formed, assembly of the connecting portion is unnecessary, and assembly is not required. Continuity is ensured without being affected by accuracy. Transfer of the ball 503 from the loaded ball passage between the ball rolling grooves 505 and 508 to the turning path 510 or the ball escape path 50 from the turning path 510
The transition of the ball 503 to No. 9 is smoothly performed.

[0286]

As described above, according to the present invention, even when the moving member is large, the resin circulation path molded body is separate from the moving member main body. It can be secured and the moldability is good. In particular, since the load rolling element passage forming part along the side edge of the rolling element rolling part is thin and hard to melt, it is effective to adopt a separate structure from the moving member main body as in the present invention.

Further, since a continuous circulation path is formed by the resin circulation path molded body, the relative positional relationship between the direction changing path inner peripheral guide portion and the load rolling element path forming portion, and the direction changing path inner peripheral guide portion and the rolling direction are changed. The relative positional relationship between the moving body escape passages is directly determined, the continuity of the circulation path can be ensured, and the smooth transition of the rolling elements is guaranteed.

In particular, the connection between the load rolling element passage component and the direction changing path inner circumference guiding component, in which the direction of the rolling element changes,
If the connecting portion of the direction changing path inner peripheral guide component and the escape passage component is integrally formed, assembly of the connecting portion is unnecessary, and continuity is ensured without being affected by assembly accuracy.

Even when there is no resin-made escape passage constituting portion, the connecting portion between the load rolling member passage constituting portion and the direction change path inner peripheral guide constituting portion is continuously formed, so that the rolling member rolling portion in the load region is formed. The transition of the rolling element between the running section and the turning path is smoothly performed.

When the rolling element holding band is used, the continuity is maintained over the entire circumference of the circulation path for the holding band guide for guiding the rolling band holding band.

Also, since the thin holding band guide is formed without inserting the moving member main body, the position of the gate can be freely set without being restricted by the moving member main body. The resin can be sufficiently turned.

In particular, if the molded resin circuit forming the two infinite circulation paths on the left and right sides is divided into two parts on the left and right, even if the width of the moving block body is large, it is possible to secure the hot water circulation. .

Further, by connecting the turn guide inner peripheral guide component and the load rolling element rolling path constituent portion via a thin plate portion, it is possible to connect between the turn guide inner peripheral guide component and the load rolling element passage component, or Distortion between the direction change path inner circumference guide component and the rolling element escape passage component can be absorbed by deformation of the thin plate portion,
The relative positional relationship between one end of the direction changing path inner peripheral guide portion and the load rolling element passage forming portion, or the positional relationship between the direction changing path inner peripheral guide portion and the rolling element escape passage is accurately determined.

On the other hand, since the thin plate portion is pressed against the flat end surface of the moving member main body by the side cover due to the tightening force of the side cover, the attitude (direction with respect to the end surface of the moving member main body) of the direction changing path inner peripheral guide forming portion is distorted. In this case, the posture of the direction changing path inner circumference guiding component is corrected by the bending of the thin plate portion.

Further, the thin plate portion is firmly fastened and fixed by the fastening force of the side cover, and there is no displacement of the inner circumferential guide portion of the direction changing path.

[Brief description of the drawings]

FIG. 1 is a schematic exploded perspective view of a moving block of a linear motion guide device according to a first embodiment of the present invention.

2 shows a resin frame portion of the molded resin circuit of FIG. 1; FIG. 2 (a) is a front view, FIG. 2 (b) is a side view, and FIG. Partial sectional view taken along line CC of FIG.
(d) is a sectional view taken along line DD of FIG. (b), and (e) is (a) of FIG.
(F) is an FF line enlarged cross-sectional view of FIG. (A).

3 (a) is a sectional front view of the linear motion guide device according to Embodiment 1 of FIG. 1, and FIG. 3 (b) shows the device of FIG. Front view, (c)-(f) of FIG.
FIG. 3A is a partial cross-sectional view showing various aspects near a load ball passage constituting portion of FIG.

FIG. 4 (a) is a partially broken side view of the linear motion guide device according to the first embodiment, and FIG. 4 (b) is a circulation path from which the ball holding band of the moving block of FIG. (C) is a partial side view of the ball holding band, FIG. (D) is a plan view of FIG. (C), and FIG. (E) is a view in the direction of arrow a in FIG. It is.

5 shows a side cover of the moving block of FIG. 1, wherein FIG. 5 (a) is a front view, FIG. 5 (b) is a rear view, and FIG. 5 (c) is a central longitudinal sectional view. .

6 (a) to 6 (i) are explanatory views showing the procedure for assembling the moving block of FIG. 1.

7 (a) is a partially enlarged view of the direction changing path of FIG. 4 (b), and FIG. 7 (b) is a partial side view of the same FIG. (c) is a partial side view showing a concave portion of the direction change path of the side cover in FIG. (a), and FIG. (d) is a partial cross-sectional view of an outer peripheral pipe half of the resin pipe in FIG. (e) is a side view of the pipe half of FIG. (d), FIG. (f) is a partial cross-sectional view of the inner pipe half of the resin pipe of FIG. (a), and FIG. It is a side view of the pipe half of Drawing (f).

FIG. 8 is a schematic exploded perspective view showing Modification Example 1 of the resin circulation path molded body according to Embodiment 1 of the present invention.

9 (a) is a partially cutaway exploded side view of the molded resin circuit of FIG. 8, and FIG. 9 (b) is a front view of a first resin frame side;
FIG. 2C is a front view of the second resin frame, FIG. 2D is a rear view of the first resin frame, and FIG. 2E is a rear view of the second resin frame.

FIG. 10 is a schematic exploded perspective view showing a modified example 2 of the resin circulation path molded body according to the first embodiment of the present invention.

11 (a) is a partially cutaway exploded side view of the resin circulation path molded body of FIG. 10, and FIG. 11 (b) is a side view of one of the resin frames shown in FIG. FIG. 3C is an enlarged sectional view of the coupling portion.

FIG. 12 is a schematic exploded perspective view showing a modified example 3 of the molded resin circulation path according to the first embodiment of the present invention.

13 (a) is a partially broken side view of a linear motion guide device using the moving block of FIG. 12, and FIG. 13 (b) is a cross-sectional view of the resin circulation path molded body of FIG. 13 (a). It is.

14 (a) is a partially enlarged exploded sectional view of the direction changing path of FIG. 13 (b), FIG. 14 (b) is a partial sectional view of the assembled state of FIG. 13 (a), and FIG. 14 (c). FIG. 2A is a partial side view showing a state where a side cover is removed in FIG. 1A, and FIG. 2D is a partial side view showing a concave portion of a direction change path of the side cover in FIG.

FIG. 15 is a schematic exploded perspective view showing a modified example 4 of the molded resin circuit of the first embodiment of the present invention.

FIGS. 16 (a) to 16 (h) are explanatory views showing other various modes of the ball row of the linear motion guide device according to the first embodiment of the present invention.

FIG. 17 is a perspective view showing another configuration of the resin circulation path molded body of the linear motion guide device provided with two side rows of ball rows of FIG. 16 (a).

FIG. 18 is a schematic exploded perspective view of a moving block of the linear motion guide device according to the second embodiment of the present invention.

19 (a) is a sectional front view of the linear motion guide device according to Embodiment 2 of FIG. 18, and FIG. 19 (b) is a sectional view of one circulation path of the device of FIG. 18 (a). Partial sectional view shown, same figure
(c) is a partial plan view of the roller holder of FIG.
Is a view in the direction of arrow d in FIG.

20 shows the molded resin circuit of FIG. 18; FIG. 20 (a) is a sectional view taken along line aa of FIG. 20 (b), and FIG.
(A) is a front view, (c) is a partial side view in a state where the resin pipe of FIG. (A) is removed, and (d) is an outer peripheral side of the resin pipe of FIG. Sectional view of a pipe half, FIG.
(d) is a side view, FIG. (f) is a cross-sectional view of the inner pipe half of the resin pipe of FIG. (a), FIG. (g) is a side view of FIG.
FIG. 1H is a partial cross-sectional view showing a configuration example of the load roller passage forming section when the roller holding member is not used.

FIG. 21 is a schematic exploded perspective view showing Modification Example 1 of the resin circulation path molded body according to Embodiment 2 of the present invention.

22 (a) is a partially exploded side view of the molded resin circulation path of FIG. 21, and FIG. 22 (b) is viewed from the divided end side of the first resin frame side of FIG. 21 (a). FIG. 3C is a view of the second resin frame of FIG.

FIG. 23 is a schematic exploded perspective view showing a modified example 2 of the molded resin circuit according to the second embodiment of the present invention.

24 (a) is a partially cutaway exploded side view of the molded resin circuit of FIG. 23, and FIG. 24 (b) is a view of one of the resin frames of FIG. 23 (a) viewed from a divided end side. FIG. 3C is a view of the other resin frame of FIG.

FIG. 25 is a schematic exploded perspective view showing a third modification of the molded resin circulation path according to the second embodiment of the present invention.

FIG. 26 is a schematic exploded perspective view showing a modified example 4 of the molded resin circuit of the second embodiment of the present invention.

FIG. 27 is a half sectional front view showing another mode of the ball row of the linear motion guide device according to the second embodiment of the present invention, with a side cover removed.

FIG. 28 is a schematic exploded perspective view of an outer cylinder of a ball spline as a linear motion guide device according to a third embodiment of the present invention.

FIG. 29 (a) is a front sectional view of a ball spline according to Embodiment 3 using the outer cylinder of FIG. 28 of the present invention, and FIG. 29 (b) is one of the apparatuses of FIG. FIG. 2C is a partial cross-sectional view showing the circulation path, and FIG. 2C is an exploded cross-sectional view showing the configuration of the circulation path without the roller holder shown in FIG.

30 shows the molded resin circuit of FIG. 29. FIG. 30 (a) is a sectional view taken along line aa of FIG. 30 (b), and FIG.
FIG. 2A is a front view of FIG. 2A, FIG. 2C is a partial front view of the same figure with the resin pipe removed, and FIG. 2D is an outer peripheral side of the resin pipe of FIG. Sectional view of a pipe half, FIG.
(d) is a side view, (f) is a cross-sectional view of an inner peripheral half of the resin pipe of (a), and (g) is a side view of (f).

FIG. 31 is a schematic exploded perspective view showing Modification Example 1 of the resin circulation path molded body according to Embodiment 3 of the present invention.

FIG. 32 (a) is a partially cutaway exploded side view of the molded resin circuit body of FIG. 31, and FIG. 32 (b) is viewed from the divided end side of the first resin frame side of FIG. 31 (a). FIG. 3C is a view of the second resin frame of FIG.

FIG. 33 is a schematic exploded perspective view showing a modified example 2 of the molded resin circuit of the third embodiment of the present invention.

34 (a) is a partially cutaway exploded side view of the molded resin circuit of FIG. 33, and FIG. 34 (b) is a view of one of the resin frames of FIG. FIG. 3C is a view of the other resin frame of FIG.

FIG. 35 is a schematic exploded perspective view showing a third modification of the molded resin circuit body according to the third embodiment of the present invention.

FIG. 36 is a schematic exploded perspective view showing Modification Example 4 of the molded resin circuit body according to Embodiment 3 of the present invention.

FIG. 37 is a partially cutaway front view of the ball spline according to the third embodiment of the present invention in which a side cover of another ball row configuration is removed.

FIG. 38 (a) is a partially cutaway front view of a roller spline according to a fourth embodiment of the present invention with a side cover removed, and FIG. 38 (b) is a view of one roller circulation path of FIG. It is a partial longitudinal section.

39 (a) is a partial cross-sectional view showing a configuration example of a resin circulation path molded body of the roller spline in FIG. 38, and FIGS.
(e) is a figure which shows the modification examples 1-4 of a resin circulation path molded object.

40 (a) is a front view of the linear motion guide device according to Embodiment 4 of the present invention in a state where a side cover of a moving block is removed, and FIG. 40 (b) is a movement of FIG. 40 (a). It is a perspective view of a block.

FIG. 41 is a schematic exploded perspective view of the molded resin circuit of FIG. 40;

42 (a) is a front view of a resin frame constituting the molded resin circuit of FIG. 41, FIG. 42 (b) is a left side view of FIG. 41 (a), and FIG. It is a right view of figure (a).

43 shows a resin pipe constituting the molded resin circuit of FIG. 41; FIG. 43 (a) is a front view of an outer peripheral pipe half, and FIG. 43 (b) is a view of FIG. ), (C) is a front view of the inner peripheral pipe half, and (d) is a side view of (c).

44 (a) is a cross-sectional view of one circulation path from which the ball holder of the moving block of FIG. 40 (a) is removed, and FIG. 44 (b) is a portion of the direction change path of FIG. 40 (a). FIG. 3 (c) is an enlarged view, FIG. 3 (c) is a partial side view of the ball holder, FIG. 3 (d) is a plan view of FIG. 3 (c), FIG. FIG. 7 (f) is the same as FIG.
(G) is the same figure (b)
FIG. 6 is a partial side view showing a concave portion of the direction change path of the side cover of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Linear motion guide device 2 Track rail (track member) 3 Ball (rolling element) 4 Moving block (moving member) 5 Ball rolling groove (rolling element rolling section) on track rail side 6 Horizontal section 7 Sleeve section 8 Moving block Side ball rolling groove (rolling member rolling portion) 9 ball escape passage (rolling member escape passage) 9c retaining band guide groove 10 turning path 10a turning path inner circumferential guide groove (turning path inner circumferential guide section) 10b Guideway outer circumference guide groove (turnover path outer circumference guide portion) 10c holding band guide groove 11 12 ball holding band (rolling band holding band) 12b belt portion 12c spacer portion 13 block body (moving member body) 14 through hole 15 chamfer Part 20 Resin circulating path molded body 21 Load ball passage constituent part 22 Direction changing path inner circumference guiding constituent part 23 Resin pipe (ball escape passage constituent part) 24 Resin frame 25, 26, 2 First, second and third connecting plate portions 29 Thin plate portions 30, 31, 32 First, second and third end plate portions 34 Fitting holes 35, 37 Engaging convex portions 36, 38 Engaging concave portions 39 Ball Hole 39a engaging projection

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroaki Mochizuki 3-11-6 Nishi-Gotanda, Shinagawa-ku, Tokyo Inside TECHIC Corporation (72) Inventor Tadashi Hirokawa 3-11 Nishi-Gotanda, Shinagawa-ku, Tokyo No. 6 Tei HK Co., Ltd.

Claims (18)

[Claims] A track member provided with a rolling element rolling portion; and a moving member movably provided along a plurality of rolling elements along the track member. A rolling element rolling section corresponding to the rolling element rolling section of the track member; a rolling element escape passage provided in parallel with the rolling element rolling section at a predetermined interval; and the rolling element rolling section and the rolling element A linear motion guide device provided with a pair of direction change paths for connecting the escape passages and circulating the rolling elements, wherein a pair of load rolling element paths extending along both side edges of the load rolling element rolling portion. A continuous resin circulation path molded body including a part, an escape path forming part forming the escape path, and a pair of direction changing path inner circumference guiding parts forming an inner circumference guiding part of the direction changing path. Molding the resin circulation path molded body separately from the member main body; In a state where at least one of the four connection parts among the four constituent parts constituting the body is integrally formed, the connection part is divided into a plurality of parts so as to be incorporated into the moving member main body. Linear motion guide device. 2. The resin-circulation-path molded body is characterized in that a load rolling element passage component and a pair of direction change path inner peripheral guide components are integrally formed, and an escape passage component is provided separately. 2. The linear motion guide device according to 1. 3. The resin circulation path molded body has a load rolling element passage forming portion, an escape passage forming portion, and one direction changing path inner circumferential guide forming portion integrated with each other, and the other direction changing path inner circumferential guide forming portion is separated. The linear motion guide device according to claim 1, wherein the linear motion guide device is a body. 4. A molded article of a resin circulating path is formed integrally with a load rolling element passage forming section and an escape path forming section and a pair of direction change path inner peripheral guide forming sections. The linear motion guide device according to claim 1, wherein the linear motion guide device is divided into two parts in the middle of the longitudinal direction. 5. A track member provided with a rolling element rolling portion, and a moving member movably provided along a plurality of rolling elements along the track member, wherein the moving member includes: A rolling element rolling section corresponding to the rolling element rolling section of the track member; a rolling element escape path provided in parallel with the rolling element rolling section at a predetermined interval; and the rolling element rolling section and the rolling element A linear motion guide device provided with a pair of direction change paths for connecting the escape passages and circulating the rolling elements, wherein a pair of load rolling element paths extending along both side edges of the load rolling element rolling portion. And a resin circulation path molded body including a pair of direction change path inner circumference guide components forming an inner circumference guide section of the direction change path, separately from the moving member body, and the rolling element The escape passage is constituted by a through-hole formed in the moving member main body, and the resin circulation path is provided. Feature is a linear motion guide device, wherein a connection portion between at least one of the load rolling element passage forming portion and a pair of direction changing passage inner periphery guide component are integrally molded. 6. A rolling element holding band in which a number of rolling elements are held in series at a predetermined interval and side edges protrude from both side ends of the rolling elements, and a guide for guiding the side edge of the rolling element holding band. The groove is provided over the entire circumference of the circulation path.
A linear motion guide device according to any one of claims 1 to 5. 7. The direction change path inner circumference guide component has a thin plate portion joined to the end surface of the moving member main body, and is connected to the load rolling element passage component or the relief passage component via the thin plate portion. The linear motion guide device according to any one of claims 1 to 6, wherein the linear motion guide device is provided. 8. The track member is a track rail, and the moving member is a moving block having a horizontal portion facing an upper surface of the track rail and a pair of sleeve portions sandwiching left and right side surfaces of the track rail. Two rows between the upper surface and the lower surface of the moving block,
The linear motion guide device according to any one of claims 1 to 7, wherein a total of four rows are provided between the left and right side surfaces of the track rail and the inner side surface of the sleeve portion, one each for upper and lower rows. 9. The track member is a track rail, the moving member is a moving block having a pair of sleeves sandwiching the left and right side surfaces of the track rail, and the rolling elements are the left and right side surfaces of the track rail and the left and right sleeve portions of the moving block. The linear motion guide device according to any one of claims 1 to 7, wherein a total of four rows are provided, two upper and lower rows, between the inner side surfaces. 10. The linear motion according to claim 9, wherein the direction change path inner circumference guiding component is configured by integrally connecting four direction change path inner circumference guides corresponding to the four rows of rolling elements. Guide device. 11. The linear motion guide device according to claim 9, wherein the direction changing path inner circumference guiding component has a configuration in which the left and right direction changing path inner circumference guiding parts are integrally connected to each other. 12. The track member is a track rail. The moving member has a horizontal portion facing the upper surface of the track rail and a sleeve portion facing one side of the track rail. The linear motion guide device according to any one of claims 1 to 7, wherein the linear motion guide device has a total of two rows, one row on one opposing side surface and one row on an upper corner of the track rail. 13. The track member is a track rail, the moving member is a moving block having a pair of sleeves sandwiching the left and right side surfaces of the track rail, and the rolling elements are the left and right side surfaces of the track rail and the left and right sleeve portions of the moving block. The linear motion guide device according to any one of claims 1 to 7, wherein a total of two rows are provided, one row at a time, between the inner side surfaces. 14. The track member is a track rail, the moving member is a moving block provided along one side surface of the track rail, and the rolling elements are provided in two vertical rows between one side surface of the track rail and the moving block. The linear motion guide device according to any one of claims 1 to 7. 15. The method according to claim 1, wherein the track member is a spline shaft, and the moving member is an outer cylinder movably fitted to the spline shaft via a plurality of rolling element rows. Linear motion guide device. 16. A track rail provided with a total of four rolling element rolling portions on each of the left and right side surfaces, and a pair of sleeve portions sandwiching the left and right side surfaces of the track rail. A moving block provided with a total of four load rolling element rolling parts, two corresponding to the rolling element rolling parts provided on the track rail; and Four infinite circulation paths are constituted by four rolling element escape passages provided in parallel with the rolling element rolling section, and a direction change path connecting both ends of the rolling element rolling section and the rolling element escape path. In the linear motion guide device, a pair of load rolling element passage components that extend along both side edges of the load rolling element rolling part that configures each of the infinite circulation paths, and an escape path component that configures the relief path, A pair of direction change path inner circumference guides constituting an inner circumference guide portion of the direction change path And forming a continuous resin circulation path molded body having a forming part separately from the moving block main body, and forming the resin circulation path molded body into two endless infinite circulations provided on both right and left sleeves of the moving block. The resin circulation path molded body is formed integrally with a load rolling element passage forming part and a pair of direction change path inner circumferential guide forming parts, and a relief passage forming part is formed separately. A linear motion guide device, characterized in that: 17. A rolling element holding band that holds a number of rolling elements in series at predetermined intervals and has side edges protruding from both side ends of the rolling elements, and a guide for guiding the side edge of the rolling element holding band. The groove is provided over the entire circumference of the circulation path.
7. The linear motion guide device according to 6. 18. A direction change path inner circumference guide component has a thin plate portion joined to an end surface of a moving member main body, and is connected to a load rolling element passage component or a relief passage component via the thin plate portion. The linear motion guide device according to claim 16 or 17, wherein: