WO2015125830A1 - Motion guidance device - Google Patents

Motion guidance device Download PDF

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Publication number
WO2015125830A1
WO2015125830A1 PCT/JP2015/054461 JP2015054461W WO2015125830A1 WO 2015125830 A1 WO2015125830 A1 WO 2015125830A1 JP 2015054461 W JP2015054461 W JP 2015054461W WO 2015125830 A1 WO2015125830 A1 WO 2015125830A1
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WO
WIPO (PCT)
Prior art keywords
positioning
rolling element
groove
protrusion
positioning protrusions
Prior art date
Application number
PCT/JP2015/054461
Other languages
French (fr)
Japanese (ja)
Inventor
弘幸 岸
紀貴 鈴木
衣梨子 渡邊
Original Assignee
Thk株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thk株式会社 filed Critical Thk株式会社
Publication of WO2015125830A1 publication Critical patent/WO2015125830A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/04—Ball or roller bearings
    • F16C29/06—Ball or roller bearings in which the rolling bodies circulate partly without carrying load
    • F16C29/0633—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides
    • F16C29/0635—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides whereby the return paths are provided as bores in a main body of the U-shaped carriage, e.g. the main body of the U-shaped carriage is a single part with end caps provided at each end
    • F16C29/0638—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides whereby the return paths are provided as bores in a main body of the U-shaped carriage, e.g. the main body of the U-shaped carriage is a single part with end caps provided at each end with balls
    • F16C29/0642—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides whereby the return paths are provided as bores in a main body of the U-shaped carriage, e.g. the main body of the U-shaped carriage is a single part with end caps provided at each end with balls with four rows of balls
    • F16C29/0647—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides whereby the return paths are provided as bores in a main body of the U-shaped carriage, e.g. the main body of the U-shaped carriage is a single part with end caps provided at each end with balls with four rows of balls with load directions in X-arrangement

Definitions

  • the present invention relates to a motion guide device.
  • This application claims priority based on Japanese Patent Application No. 2014-031546 filed in Japan on February 21, 2014, the contents of which are incorporated herein by reference.
  • linear guides and ball splines are known as motion guide devices.
  • a motion guide device has a track body, a movable body that can move along the track body, and a plurality of rolling elements that roll on an infinite circuit formed by the track body and the movable body.
  • the moving body is provided with a rolling element direction changing path for infinite circulation of the rolling element. This rolling element direction change path is formed in the inside of the cover body attached to the end surface of a moving body main body.
  • the lid body is formed by combining two parts of the rolling element direction changing inner periphery guide portion and the rolling element direction changing outer periphery guide portion.
  • the rolling body direction changing outer circumferential guide portion is positioned with respect to the moving body main body, and then the rolling body direction changing inner circumferential guide portion is positioned with respect to the rolling body direction changing outer circumferential guide portion.
  • the scooping part which scoops up a rolling element to a rolling element direction change path is provided in the rolling element direction change inner periphery guide part.
  • the present invention provides a motion guide device that improves the positioning accuracy of the lid body, which is a combination of two parts, with respect to the moving body and can withstand high-speed use over a long period of time.
  • the motion guide device is configured to roll on an infinite circuit formed by a track body, a movable body movable along the track body, and the track body and the movable body.
  • the moving body includes a moving body main body and a lid that is attached to an end surface of the moving body main body and forms a rolling element direction changing path of the infinite circulation path.
  • the lid body is a combination of a rolling element direction change inner periphery guide part and a rolling element direction change outer periphery guide part, provided on the end surface of the movable body main body, and a positioning groove for positioning the lid body, A plurality of positioning protrusions provided on one of the rolling element direction changing inner periphery guide part and the rolling element direction changing outer periphery guide part, insertable into the positioning groove, the rolling element direction change inner periphery guide part, and the rolling element A protrusion extending portion that is provided on the other of the direction change outer peripheral guide portions, engages with the one so as to extend the interval between the plurality of positioning protrusions, and presses the positioning protrusions against the positioning grooves; Have.
  • the protrusion extension portion is provided in front of the end surface in the insertion direction of the plurality of positioning protrusions with respect to the positioning groove. It has been.
  • the movement guide device has a relief groove provided around the plurality of positioning protrusions and recessed with respect to the end face.
  • the protrusion extension portion is engaged with each of the plurality of positioning protrusions. It has an engagement hole.
  • the protrusion extension portion is press-fitted between the plurality of positioning protrusions. Has a mating protrusion.
  • the rolling element direction change inner circumferential guide portion is formed in a gate shape.
  • the positioning groove, the plurality of positioning protrusions, and the protrusion expanding portion are provided at positions corresponding to corner portions of the rolling element direction change inner circumferential guide portion.
  • the rolling body direction changing path is provided adjacent to the lid.
  • the positioning groove, the plurality of positioning protrusions, and the protrusion extending portion are provided at corresponding positions between the adjacent rolling element direction change paths.
  • the moving body main body is provided with a part of the infinite circulation path.
  • a load rolling element rolling groove to be formed is provided, and the positioning groove is provided on the same surface as the surface on which the load rolling element rolling groove is formed.
  • the above-described motion guide device improves the positioning accuracy of the cover body, which is a combination of two parts, with respect to the moving body, and can withstand long-term high-speed use.
  • FIG. 4 is a cross-sectional view taken along line AA in FIG. 3. It is a figure for demonstrating an effect
  • FIG. 8 is a cross-sectional view taken along the line BB in FIG. It is a figure for demonstrating an effect
  • FIG. 1 is a perspective view of a linear guide 1 according to the first embodiment of the present invention.
  • FIG. 2 is a partial sectional view of the linear guide 1 according to the first embodiment of the present invention viewed from the front side.
  • the linear guide 1 (motion guide device) includes a track rail 10 (track body) and a slider block 20 (moving body).
  • the linear guide 1 has the some ball
  • the track rail 10 forms the track of the slider block 20 as shown in FIG.
  • the track rail 10 is a metal member formed in a substantially rectangular shape in a cross section perpendicular to the longitudinal direction thereof.
  • the center of the side portion 11 of the track rail 10 is recessed.
  • a rolling element rolling groove 12 extending in the longitudinal direction of the track rail 10 is provided above the recessed portion.
  • the track rail 10 is formed with a plurality of bolt mounting holes 13 penetrating in the thickness direction at intervals in the longitudinal direction.
  • the track rail 10 is fixed to a base member (not shown) by a bolt (not shown) inserted through the bolt mounting hole 13.
  • a shielding cap 14 that shields the bolt is attached to the opening edge of the bolt attachment hole 13 (the upper surface of the track rail 10).
  • the slider block 20 is movable along the track rail 10.
  • the slider block 20 includes a block main body 21 (moving body main body) and an end plate 22 (lid body) attached to the end surface 21 s of the block main body 21.
  • the block main body 21 is formed in a rectangular parallelepiped shape.
  • the flat end plate 22 is attached with the volt
  • the linear guide 1 is formed with four endless circulation paths L that are endless oval or elliptical.
  • the infinite circulation path L is composed of a pair of linear portions extending in the longitudinal direction and a pair of semicircular curved portions connecting the ends of the pair of linear portions. As shown in FIG. 2, one of the linear portions is a loaded rolling element rolling path L1, and the other is an unloaded rolling element rolling path L2.
  • the pair of semicircular curved portions are rolling element direction change paths L3 (see FIG. 3 described later).
  • the ball 30 is held inside the infinite circulation path L so as to be able to roll.
  • the ball 30 is a spherical member made of, for example, a metal material.
  • a plurality of balls 30 are interposed between the track rail 10 and the slider block 20 (block body 21) so as to smoothly move the slider block 20 relative to the track rail 10.
  • the plurality of balls 30 are arranged in the endless circuit L without any gap and circulate through the endless circuit L.
  • the slider block 20 is supported through the plurality of balls 30 so as to be reciprocally movable along the track rail 10.
  • the plurality of balls 30 are held at equal intervals by, for example, a belt-like retainer 31.
  • a plurality of rectangular openings are formed at equal intervals in the longitudinal direction.
  • a plurality of balls 30 are held by the retainer 31 by accommodating the balls 30 in the rectangular openings.
  • the retainer 31 itself has an end shape, but is disposed in an endless manner in which both ends are brought close to each other in the endless circuit L. Thereby, the plurality of balls 30 circulate in the endless circuit L together with the retainer 31.
  • the block body 21 is formed in a gate shape having a C-shaped or U-shaped cross section.
  • a rail accommodating portion 23 is formed in the longitudinal direction.
  • the track rail 10 is accommodated with a slight gap.
  • Projected portions are formed on the pair of inner side surfaces 24 of the rail housing portion 23 so as to face the recessed portions of the side portions 11 of the track rail 10.
  • a load rolling element rolling groove 25 extending in the longitudinal direction is formed above the protruding portion.
  • a pair of load rolling element rolling grooves 25 are formed on one inner side surface 24. For this reason, four load rolling element rolling grooves 25 are formed in the block main body 21.
  • the rolling element rolling groove 12 in the track rail 10 and the loaded rolling element rolling groove 25 in the block body 21 are arranged so as to face each other.
  • a space (a space extending in the longitudinal direction) formed between the rolling element rolling groove 12 and the loaded rolling element rolling groove 25 is a loaded rolling element rolling path L1.
  • the block body 21 is formed with a no-load rolling element rolling path L2 penetrating in the longitudinal direction.
  • Four unloaded rolling element rolling paths L2 are formed corresponding to the four loaded rolling element rolling paths L1.
  • the end plate 22 is a flat resin molded member that is fixed to the end surface 21 s of the block body 21. Similar to the block body 21, the end plate 22 is formed in a gate shape having a C-shaped or U-shaped cross section. A rail accommodating portion 26 is formed on the bottom surface of the end plate 22. In the rail accommodating part 26, the track rail 10 is accommodated with a slight gap. On the inner surface of the end plate 22 that is tightly fixed to the end surface 21s of the block main body 21, a rolling element direction changing path L3 described later is formed. The rolling element direction changing path L3 connects the loaded rolling element rolling path L1 and the unloaded rolling element rolling path L2.
  • FIG. 3 is a view of the end plate 22 in the first embodiment of the present invention as viewed from the inner surface side.
  • FIG. 4 is an exploded perspective view of the end plate 22 in the first embodiment of the present invention.
  • 5 is a cross-sectional view taken along line AA in FIG.
  • FIG. 6 is a view for explaining the operation of the positioning portion 50 in the first embodiment of the present invention.
  • the end plate 22 forms the rolling element direction change path L3 of the infinite circuit L as shown in FIG.
  • the end plate 22 is connected to a bolt insertion hole 27 through which the bolt 2 (see FIGS. 1 and 2) is inserted, and a grease supply hole 28 that is connected to a greasing device (not shown) and is supplied with lubricant from the outside. And a greasing groove 29 communicating with the greasing hole 28 is formed. The lubricant that has passed through the greasing groove 29 is supplied to the load rolling element rolling groove 25 of the block body 21 and the like.
  • the end plate 22 is configured by combining an inner plate 40 (rolling member direction changing inner periphery guide portion) and an outer plate 41 (rolling member direction changing outer periphery guide portion).
  • the inner plate 40 forms the inner periphery of the rolling element direction changing path L3 having a semicircular arc shape.
  • the inner plate 40 is formed with a scoop portion 40a that scoops up the ball 30 from the loaded rolling element rolling path L1.
  • the inner plate 40 is formed with a greasing hole 28 a and a greasing groove 29.
  • the outer plate 41 forms the outer periphery of the rolling element direction changing path L3 having a semicircular arc shape.
  • the outer plate 41 has a bolt insertion hole 27 and a greasing hole 28b communicating with the greasing hole 28a.
  • the end plate 22 is attached by the inner plate 40 being closely fixed to the end surface 21 s of the block main body 21 and the outer plate 41 being fixed so as to cover the outside.
  • the positioning of the end plate 22 with respect to the block body 21 is performed by the positioning unit 50.
  • the positioning part 50 includes a positioning groove 51, a positioning protrusion 52, and a protrusion extension part 53.
  • the positioning groove 51 is provided on the end surface 21 s of the block main body 21.
  • the positioning groove 51 is formed to position the end plate 22 on the block main body 21.
  • the positioning groove 51 is a circular hole.
  • the positioning groove 51 is formed with a predetermined depth in a direction perpendicular to the end surface 21s.
  • the positioning protrusion 52 is provided on the outer plate 41 (one side) as shown in FIGS. 4 and 5.
  • a plurality of the positioning protrusions 52 are provided on the outer plate 41 and are spaced from each other.
  • the three positioning protrusions 52 are arranged in a circle at intervals of 120 °.
  • the end faces of the plurality of positioning protrusions 52 are formed in an arc shape.
  • the plurality of positioning protrusions 52 are formed with a length that can be inserted into the positioning groove 51.
  • the plurality of positioning protrusions 52 are configured to be elastically deformable at least in the radial direction.
  • the plurality of positioning protrusions 52 of the present embodiment are resin-molded integrally with the outer plate 41 and have a predetermined spring property.
  • relief grooves 54 that are recessed with respect to the end surface 21 s are provided around the plurality of positioning protrusions 52.
  • the escape groove 54 ensures the length of the positioning protrusion 52 and also secures a space in which the positioning protrusion 52 can be elastically deformed.
  • the protrusion extension 53 is provided on the inner plate 40 (the other) as shown in FIGS.
  • the protrusion expanding portion 53 engages with the outer plate 41 so as to expand the interval between the plurality of positioning protrusions 52.
  • the protrusion expanding portion 53 of the present embodiment has a plurality of engagement holes 55 that engage with each of the plurality of positioning protrusions 52.
  • three engagement holes 55 are provided corresponding to the three positioning protrusions 52.
  • the engagement hole 55 is formed in an arc shape corresponding to the end surface shape of the positioning protrusion 52. Further, the engagement hole 55 is formed to be slightly larger than the positioning protrusion 52.
  • the plurality of engagement holes 55 correspond to the plurality of positioning protrusions 52 arranged in a circle, and are arranged at intervals of 120 ° in the circumferential direction.
  • the engagement hole 55 is disposed slightly outside the plurality of positioning protrusions 52 in the radial direction. For this reason, when a plurality of positioning projections 52 are inserted into each of the plurality of engagement holes 55, a load is applied to the plurality of positioning projections 52 so as to open radially outward, and the interval between adjacent positioning projections 52 is increased. Expand.
  • the protrusion expanding portion 53 applies a load so that the tips of the plurality of positioning protrusions 52 expand outward from the diameter of the positioning groove 51.
  • the protrusion expanding portion 53 is provided in front of the end surface 21 s in the insertion direction of the plurality of positioning protrusions 52 with respect to the positioning groove 51. That is, the protrusion extending portion 53 is positioned in front of the end surface 21s of the block main body 21, and is arranged so as not to overlap the positioning groove 51 in a direction parallel to the end surface 21s (the vertical direction in the drawing of FIG. 5). Yes. That is, the plurality of positioning protrusions 52 are sandwiched by the positioning grooves 51 and the protrusion expanding portions 53 so that the inner side and the outer side do not overlap. Therefore, the plurality of positioning protrusions 52 are pressed against the positioning groove 51 with a predetermined spring property.
  • the positioning portion 50 is provided at a position corresponding to the corner portion 42 of the inner plate 40 formed in a gate shape, and is provided at two locations in the present embodiment. Next, the operation of the positioning unit 50 configured as described above will be described.
  • the positioning unit 50 includes a positioning groove 51 provided on the end surface 21 s of the block body 21, a plurality of positioning protrusions 52 provided on the outer plate 41, and a protrusion extension provided on the inner plate 40. Part 53. As shown in FIGS. 3 and 4, the protrusion extension portion 53 can be engaged with the outer plate 41, and the inner plate 40 and the outer plate 41 are positioned by the engagement of the protrusion extension portion 53.
  • the protrusion expanding portion 53 has a plurality of engagement holes 55 that engage with each of the plurality of positioning protrusions 52.
  • each of the plurality of positioning projections 52 can be independently pushed outward in the radial direction as shown in FIG. it can.
  • the shape stability when the plurality of positioning protrusions 52 are expanded and deformed can be enhanced.
  • the tips of the plurality of positioning protrusions 52 are inserted into the positioning grooves 51. For this reason, the plurality of positioning protrusions 52 are pressed in a direction opposite to the direction in which they are spread (outside in the radial direction) (inside in the radial direction: indicated by arrows in FIG. 6). Further, the plurality of positioning protrusions 52 are pressed against the positioning groove 51 by the spring load corresponding to the pressed position. Thereby, positioning with respect to the block main body 21 and the outer plate 41 is performed. Here, the plurality of positioning protrusions 52 are pressed against the positioning grooves 51 due to the expansion action by the protrusion expansion portion 53 of the inner plate 40. For this reason, the positioning of the outer plate 41 with respect to the block body 21 can be regarded as the positioning of the inner plate 40 with respect to the block body 21.
  • the positioning unit 50 configured as described above, the error accumulation between the inner plate 40 and the outer plate 41 with respect to the block body 21 can be reduced. For this reason, when attaching the end plate 22 to the end surface 21s of the block main body 21, the rolling element direction changing path L3 formed in the end plate 22, the loaded rolling element rolling path L1 formed in the block main body 21, and the no-load rolling
  • the end plate 22 can be accurately positioned with respect to the block main body 21 so that a step does not occur at the connecting portion with the moving body rolling path L2.
  • the inner plate 40 is provided with a scooping portion 40a that scoops the ball 30 up to the rolling element direction changing path L3.
  • the contact position between the ball 30 and the rake portion 40a does not vary, and the component life is extended even at high speed use.
  • the protrusion extension portion 53 is provided in front of the end surface 21 s with respect to the positioning groove 51.
  • the positioning groove 51 and the protrusion extension portion 53 can be avoided from overlapping and the positioning protrusion 52 can be provided with a spring property.
  • the positioning protrusion 52 sandwiched between the positioning groove 51 and the protrusion extension portion 53 with a spring property, it is possible to prevent the accumulation of component errors and to easily and reliably position the component, and to fit the component. As a result, all the positions are determined, so the assemblability is improved.
  • escape grooves 54 provided around the plurality of positioning protrusions 52 and recessed with respect to the end surface 21s. According to this configuration, the length of the positioning protrusion 52 can be secured and elastic deformation can be easily performed. Therefore, even if the positioning protrusion 52 is sandwiched between the positioning groove 51 and the protrusion expanding portion 53, the spring property is sufficiently obtained. Can be maintained.
  • the inner plate 40 is formed in a gate shape.
  • a positioning portion 50 having a positioning groove 51, a plurality of positioning protrusions 52, and a protrusion extension portion 53 is provided at a position corresponding to the corner portion 42 of the inner plate 40.
  • the corner portion 42 of the inner plate 40 is a portion that undergoes relatively little deformation during resin molding. That is, the inner plate 40 is easily deformed so that both feet open or close with the corner portion 42 as a fulcrum during resin molding. Therefore, the positioning portion 50 is provided at a position corresponding to the corner portion 42 (a position serving as a fulcrum for deformation). Thereby, the positioning accuracy can be further improved.
  • the slider block 20 is also formed in a gate shape, and similarly, the slider block 20 is easily deformed so that both legs are opened or closed with the corner portion as a fulcrum. For this reason, positioning accuracy can be improved more by providing the positioning part 50 in the position corresponding to the corner
  • the linear guide 1 is infinitely formed by the track rail 10, the slider block 20 movable along the track rail 10, and the track rail 10 and the slider block 20. And a plurality of balls 30 rolling on the circulation path L.
  • the slider block 20 includes a block main body 21 and an end plate 22 that is attached to the end surface 21 s of the block main body 21 and forms a rolling element direction changing path L3 of the infinite circulation path L.
  • the end plate 22 is formed by combining an inner plate 40 and an outer plate 41, and is provided on the end surface 21 s of the block body 21.
  • the end plate 22 includes a positioning groove 51 for positioning the end plate 22, a plurality of positioning protrusions 52 provided in one of the inner plate 40 and the outer plate 41 and insertable into the positioning groove 51, and an inner plate A protrusion extending portion 53 that is provided on the other of the plate 40 and the outer plate 41, engages with one of the plurality of positioning protrusions 52 so as to expand the interval between the positioning protrusions 52, and presses the positioning protrusions 52 against the positioning grooves 51;
  • the linear guide 1 that improves the positioning accuracy of the end plate 22 formed by combining two parts with respect to the block main body 21 and can withstand high-speed use for a long period of time can be obtained.
  • FIG. 7 is a view of the end plate 22 in the second embodiment of the present invention as viewed from the inner surface side.
  • FIG. 8 is an exploded perspective view of the end plate 22 in the second embodiment of the present invention.
  • 9 is a cross-sectional view taken along the line BB in FIG.
  • FIG. 10 is a diagram for explaining the operation of the positioning portion 50a in the second embodiment of the present invention.
  • FIG. 11 is an enlarged view of a main part of the end plate 22 in the second embodiment of the present invention.
  • FIG. 12 is a diagram for explaining the operation of the positioning portion 50b in the second embodiment of the present invention.
  • the second embodiment is different from the above-described embodiment in that it includes positioning portions 50a and 50b. Only one of the positioning portions 50a and 50b described below may be provided.
  • the positioning part 50a has a positioning groove 51a, a positioning protrusion 52a, and a protrusion extension part 53a.
  • the positioning groove 51 a is a circular hole provided in the end surface 21 s of the block body 21.
  • the positioning protrusions 52a are provided on the inner plate 40 (one side), and as shown in FIG. 7, a plurality (three) of the positioning protrusions 52a are arranged at intervals.
  • the plurality of positioning protrusions 52a are formed with a length that can be inserted into the positioning groove 51a.
  • the plurality of positioning projections 52a are integrally molded with the inner plate 40 and have a predetermined spring property. Further, an escape groove 54a that is recessed with respect to the end surface 21s is provided around the plurality of positioning protrusions 52a. As shown in FIG. 8, the protrusion extension portion 53 a is provided on the outer plate 41 (the other). The protrusion expanding portion 53a engages with the inner plate 40 so as to expand the interval between the plurality of positioning protrusions 52a.
  • the protrusion extension 53a of the present embodiment has an engagement protrusion 56a that is press-fitted between the plurality of positioning protrusions 52a.
  • the inner plate 40 is provided with a press-fitting hole 57a into which the engaging protrusion 56a is press-fitted. As shown in FIG. 7, a plurality of positioning protrusions 52a are disposed around the press-fit hole 57a.
  • the engagement protrusion 56a has an outer shape slightly larger than the press-fitting hole 57a. For this reason, when the engagement protrusion 56a is press-fitted into the press-fitting hole 57a, a load that opens radially outward is applied to the plurality of positioning protrusions 52a, and the interval between the adjacent positioning protrusions 52a is expanded.
  • the positioning portion 50a is provided at a position corresponding to the corner portion 42 of the inner plate 40 that is resin-molded into a portal shape.
  • the positioning part 50a is provided in two places in this embodiment.
  • the protrusion expanding portion 53a has the engagement protrusion 56a that is press-fitted between the plurality of positioning protrusions 52. For this reason, when the engagement protrusion 56a is press-fitted into the press-fitting hole 57a, each of the plurality of positioning protrusions 52a can be pushed outward in the radial direction, as shown in FIG. As described above, since the interval between the plurality of positioning protrusions 52a can be expanded by the single engaging protrusion 56a, the structure of the protrusion expanding portion 53a can be simplified as compared with the above embodiment.
  • the several positioning protrusion 52a is the direction (diameter direction outer side) and the direction (radial direction inner side: FIG. Is shown).
  • the plurality of positioning protrusions 52a are pressed against the positioning grooves 51b with the spring load corresponding to the pressed positions. Therefore, according to the positioning part 50a having the above configuration, the error accumulation between the inner plate 40 and the outer plate 41 with respect to the block main body 21 can be reduced as in the above embodiment.
  • the positioning part 50b has a positioning groove 51b, a positioning protrusion 52b, and a protrusion expanding part 53b.
  • the positioning groove 51b is a substantially V-shaped groove extending in the longitudinal direction of the block body 21 from the end surface 21s.
  • the positioning groove 51 b is provided on the same surface (the inner surface 24 of the block body 21) as the surface on which the load rolling element rolling groove 25 is formed.
  • the positioning projection 52b is provided on the inner plate 40 (one side) as shown in FIG. As shown in FIG. 7, a plurality (two) of the positioning protrusions 52b are arranged at intervals. As shown in FIG. 11, the plurality of positioning protrusions 52b are formed with a length that can be inserted into the positioning groove 51b.
  • the plurality of positioning projections 52b are integrally molded with the inner plate 40 and have a predetermined spring property.
  • relief grooves 54b recessed with respect to the end surface 21s are provided.
  • the protrusion extension part 53b is provided in the outer plate 41 (the other) as shown in FIG.
  • the protrusion extending portion 53b engages with the inner plate 40 so as to expand the interval between the plurality of positioning protrusions 52b.
  • the projection extension 53b of the present embodiment has an engagement projection 56b that is press-fitted between the plurality of positioning projections 52b.
  • the inner plate 40 is provided with a press-fit groove 57b into which the engagement protrusion 56b is press-fitted. As shown in FIG. 12, the press-fit groove 57 b is formed in a substantially pentagonal shape, and is arranged so that the top of the pentagon is inserted between the adjacent positioning protrusions 52 b.
  • the engaging protrusion 56b has an outer shape slightly larger than the press-fitting groove 57b. For this reason, as shown in FIG. 11, when the engaging protrusions 56b are press-fitted into the press-fit grooves 57b, a load that opens radially outward is applied to the plurality of positioning protrusions 52b, and the spacing between the adjacent positioning protrusions 52b is increased. Expands. As shown in FIG. 7, the positioning portion 50 b is provided at a position corresponding to between the adjacent rolling element direction change paths L ⁇ b> 3 in the end plate 22, and is provided at two locations in the present embodiment.
  • the protrusion extension part 53b has the engaging protrusions 56b that are press-fitted between the plurality of positioning protrusions 52. For this reason, when the engagement protrusion 56b is press-fitted into the press-fitting groove 57b, each of the plurality of positioning protrusions 52b can be pushed outward in the radial direction as shown in FIG. As described above, since the interval between the plurality of positioning protrusions 52b can be expanded by the single engaging protrusion 56b, the structure of the protrusion expanding portion 53b can be simplified similarly to the positioning portion 50a.
  • the tips of the plurality of positioning protrusions 52b are inserted into the positioning grooves 51b. Therefore, the plurality of positioning protrusions 52b are pressed in the direction opposite to the direction in which they are spread (indicated by arrows in FIG. 12), and are pressed against the positioning groove 51b with the spring load corresponding to the pressed-in. Therefore, according to the positioning part 50b having the above-described configuration, the error accumulation between the inner plate 40 and the outer plate 41 with respect to the block main body 21 can be reduced as in the above embodiment.
  • the end plate 22 is provided with the rolling element direction change path L3 adjacent to each other, and the positioning portion 50b is located between the adjacent rolling element direction change paths L3. Is provided at a position corresponding to. According to this configuration, in the vicinity of the connecting portion between the rolling element direction changing path L3 formed in the end plate 22 and the loaded rolling element rolling path L1 and the no-load rolling element rolling path L2 formed in the block body 21, The end plate 22 can be accurately positioned with respect to the block main body 21, and a minute step at the connection portion can be further reduced.
  • the positioning groove 51b is provided on the same inner side surface 24 as the surface on which the load rolling element rolling groove 25 is formed. According to this configuration, the positioning groove 51b and the loaded rolling element rolling groove 25 can be ground simultaneously. For this reason, the inner plate 40 and the outer plate 41 can be positioned accurately with reference to the positioning groove 51b having the simultaneous grinding surface with the best accuracy with the loaded rolling element rolling groove 25, and a structure with less play is provided. Can do. For this reason, the contact position between the rake portion 40a and the ball 30 is stabilized, and the ball 30 can be reliably applied to a portion where the strength is secured in the rake portion 40a. be able to.
  • the configuration in which the positioning groove 51 and the protrusion extension portion 53 are prevented from overlapping each other has been described.
  • positioning is performed in a state where at least a part of the positioning groove 51 and the protrusion extension portion 53 overlap.
  • a configuration in which the protrusion 52 is sandwiched can also be employed.
  • the ball is used as the rolling element, but the present invention can employ other rolling elements such as a roller.
  • the present invention is applied to a linear guide, but the present invention can also be applied to other motion guide devices such as a ball spline.
  • the above-described motion guide device improves the positioning accuracy of the cover body, which is a combination of two parts, with respect to the moving body, and can withstand long-term high-speed use.

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Abstract

A linear guide (1) is provided with an end plate (22) formed by combining an inner plate (40) and an outer plate (41). The end plate (22) is provided with: a positioning groove (51) which is provided in an end surface (21s) of a block main body (21), and which is for positioning the end plate (22); a plurality of positioning protrusions (52) which are provided to one plate from among the inner plate (40) and the outer plate (41), and which are capable of being inserted into the positioning groove (51); and a protrusion extension part (53) which is provided to the other plate from among the inner plate (40) and the outer plate (41), engages with the one plate so as to extend the space between the plurality of positioning protrusions (52), and presses the plurality of positioning protrusions (52) against the positioning groove (51).

Description

運動案内装置Exercise guidance device
　本発明は、運動案内装置に関するものである。
　本願は、２０１４年２月２１日に、日本に出願された特願２０１４－０３１５４６号に基づき優先権を主張し、その内容をここに援用する。 The present invention relates to a motion guide device.
This application claims priority based on Japanese Patent Application No. 2014-031546 filed in Japan on February 21, 2014, the contents of which are incorporated herein by reference.
　運動案内装置として、例えばリニアガイドやボールスプラインが知られている。このような運動案内装置は、軌道体と、軌道体に沿って移動可能な移動体と、軌道体と移動体とによって形成された無限循環路を転走する複数の転動体と、を有する。移動体には、転動体を無限循環させるための転動体方向転換路が設けられている。この転動体方向転換路は、移動体本体の端面に取り付けられる蓋体の内部に形成されている。 For example, linear guides and ball splines are known as motion guide devices. Such a motion guide device has a track body, a movable body that can move along the track body, and a plurality of rolling elements that roll on an infinite circuit formed by the track body and the movable body. The moving body is provided with a rolling element direction changing path for infinite circulation of the rolling element. This rolling element direction change path is formed in the inside of the cover body attached to the end surface of a moving body main body.
　この運動案内装置では、移動体本体の端面に蓋体を取り付ける際に、蓋体に形成された転動体方向転換路と移動体本体に形成された転動体転走溝との接続部分に段差が生じないように、蓋体を移動体本体に対して正確に位置決めする必要がある。
　下記特許文献１には、軌道体に対向する移動体本体の内側面に位置決め部を設け、該位置決め部に係合して蓋体を所定位置に位置決めする位置決め突起を蓋体に設けた運動案内装置が開示されている。 In this motion guide device, when the lid is attached to the end face of the moving body, there is a step at the connecting portion between the rolling element direction changing path formed on the lid and the rolling element rolling groove formed on the moving body. It is necessary to accurately position the lid with respect to the movable body main body so as not to occur.
In the following Patent Document 1, a motion guide is provided in which a positioning portion is provided on an inner surface of a moving body main body facing a track body, and a positioning projection for engaging the positioning portion to position the lid body at a predetermined position. An apparatus is disclosed.
特開２００５－９８３５５号公報JP 2005-98355 A
　転動体方向転換路は湾曲しているため、蓋体は、転動体方向転換内周案内部と転動体方向転換外周案内部の２つの部品を組み合わせて形成されている。
　従来は、移動体本体に対して転動体方向転換外周案内部を位置決めした後に、その転動体方向転換外周案内部に対して転動体方向転換内周案内部を位置決めする構造となっている。このため、部品の誤差が累積し、移動体本体の転動体転走溝に対して蓋体の位置決め精度が低下する場合がある。また、転動体方向転換内周案内部には、転動体を転動体方向転換路にすくい上げるすくい部が設けられている。そのため、部品誤差の累積によって転動体とすくい部との接触位置がばらつくと、比較的強度の弱い部分に転動体が当たる頻度が増加し、特に高速使用においては部品寿命が短くなり易い。誤差の累積を小さくするために各部品の精度を上げる場合、コストアップが必要となる。 Since the rolling element direction changing path is curved, the lid body is formed by combining two parts of the rolling element direction changing inner periphery guide portion and the rolling element direction changing outer periphery guide portion.
Conventionally, the rolling body direction changing outer circumferential guide portion is positioned with respect to the moving body main body, and then the rolling body direction changing inner circumferential guide portion is positioned with respect to the rolling body direction changing outer circumferential guide portion. For this reason, the error of components accumulates and the positioning accuracy of a cover body may fall with respect to the rolling-element rolling groove of a mobile body main body. Moreover, the scooping part which scoops up a rolling element to a rolling element direction change path is provided in the rolling element direction change inner periphery guide part. Therefore, if the contact position between the rolling element and the rake portion varies due to the accumulation of component errors, the frequency of the rolling element hitting a relatively weak portion increases, and the component life tends to be shortened particularly in high-speed use. To increase the accuracy of each component in order to reduce the error accumulation, an increase in cost is required.
　本発明は、２つの部品を組み合わせて成る蓋体の移動体本体に対する位置決め精度を向上させ、長期間の高速使用にも耐え得る運動案内装置を提供する。 The present invention provides a motion guide device that improves the positioning accuracy of the lid body, which is a combination of two parts, with respect to the moving body and can withstand high-speed use over a long period of time.
　本発明の第一の態様によれば、運動案内装置は、軌道体と、前記軌道体に沿って移動可能な移動体と、前記軌道体と前記移動体とによって形成された無限循環路を転走する複数の転動体と、を有する。前記移動体は、移動体本体と、前記移動体本体の端面に取り付けられて前記無限循環路の転動体方向転換路を形成する蓋体と、を有する。前記蓋体は、転動体方向転換内周案内部及び転動体方向転換外周案内部が組み合わされて成り、前記移動体本体の前記端面に設けられ、前記蓋体を位置決めするための位置決め溝と、前記転動体方向転換内周案内部及び転動体方向転換外周案内部のうちの一方に設けられ、前記位置決め溝に挿入可能な複数の位置決め突起と、前記転動体方向転換内周案内部及び転動体方向転換外周案内部のうちの他方に設けられ、前記複数の位置決め突起の間隔を拡張させるように前記一方に係合し、前記複数の位置決め突起を前記位置決め溝に押し当てる突起拡張部と、を有する。 According to the first aspect of the present invention, the motion guide device is configured to roll on an infinite circuit formed by a track body, a movable body movable along the track body, and the track body and the movable body. A plurality of rolling elements that run. The moving body includes a moving body main body and a lid that is attached to an end surface of the moving body main body and forms a rolling element direction changing path of the infinite circulation path. The lid body is a combination of a rolling element direction change inner periphery guide part and a rolling element direction change outer periphery guide part, provided on the end surface of the movable body main body, and a positioning groove for positioning the lid body, A plurality of positioning protrusions provided on one of the rolling element direction changing inner periphery guide part and the rolling element direction changing outer periphery guide part, insertable into the positioning groove, the rolling element direction change inner periphery guide part, and the rolling element A protrusion extending portion that is provided on the other of the direction change outer peripheral guide portions, engages with the one so as to extend the interval between the plurality of positioning protrusions, and presses the positioning protrusions against the positioning grooves; Have.
　本発明の第二の態様によれば、第一の態様に係る運動案内装置において、前記突起拡張部は、前記位置決め溝に対し、前記複数の位置決め突起の挿入方向において前記端面よりも手前に設けられている。 According to a second aspect of the present invention, in the motion guide apparatus according to the first aspect, the protrusion extension portion is provided in front of the end surface in the insertion direction of the plurality of positioning protrusions with respect to the positioning groove. It has been.
　本発明の第三の態様によれば、第一または第二の態様に係る運動案内装置において、前記複数の位置決め突起の周りに設けられ、前記端面に対して凹んだ逃がし溝を有する。 According to the third aspect of the present invention, in the motion guide apparatus according to the first or second aspect, the movement guide device has a relief groove provided around the plurality of positioning protrusions and recessed with respect to the end face.
　本発明の第四の態様によれば、第一から第三の態様のうち、いずれかの態様に係る運動案内装置において、前記突起拡張部は、前記複数の位置決め突起のそれぞれと係合する複数の係合孔を有する。 According to a fourth aspect of the present invention, in the motion guide apparatus according to any one of the first to third aspects, the protrusion extension portion is engaged with each of the plurality of positioning protrusions. It has an engagement hole.
　本発明の第五の態様によれば、第一から第三の態様のうち、いずれかの態様に係る運動案内装置において、前記突起拡張部は、前記複数の位置決め突起の間に圧入される係合突起を有する。 According to a fifth aspect of the present invention, in the motion guide apparatus according to any one of the first to third aspects, the protrusion extension portion is press-fitted between the plurality of positioning protrusions. Has a mating protrusion.
　本発明の第六の態様によれば、第一から第五の態様のうち、いずれかの態様に係る運動案内装置において、前記転動体方向転換内周案内部は、門型に形成されており、前記位置決め溝と、前記複数の位置決め突起と、前記突起拡張部とは、前記転動体方向転換内周案内部の角部に対応する位置に設けられている。 According to a sixth aspect of the present invention, in the motion guide apparatus according to any one of the first to fifth aspects, the rolling element direction change inner circumferential guide portion is formed in a gate shape. The positioning groove, the plurality of positioning protrusions, and the protrusion expanding portion are provided at positions corresponding to corner portions of the rolling element direction change inner circumferential guide portion.
　本発明の第七の態様によれば、第一から第五の態様のうち、いずれかの態様に係る運動案内装置において、前記蓋体には、前記転動体方向転換路が隣り合って設けられており、前記位置決め溝と、前記複数の位置決め突起と、前記突起拡張部とは、前記隣り合う前記転動体方向転換路の間に対応する位置に設けられている。 According to a seventh aspect of the present invention, in the motion guide apparatus according to any one of the first to fifth aspects, the rolling body direction changing path is provided adjacent to the lid. The positioning groove, the plurality of positioning protrusions, and the protrusion extending portion are provided at corresponding positions between the adjacent rolling element direction change paths.
　本発明の第八の態様によれば、第一から第五、第七の態様のうち、いずれかの態様に係る運動案内装置において、前記移動体本体には、前記無限循環路の一部を形成する負荷転動体転走溝が設けられており、前記位置決め溝は、前記負荷転動体転走溝が形成された面と同一の面に設けられている。 According to an eighth aspect of the present invention, in the motion guide apparatus according to any one of the first to fifth and seventh aspects, the moving body main body is provided with a part of the infinite circulation path. A load rolling element rolling groove to be formed is provided, and the positioning groove is provided on the same surface as the surface on which the load rolling element rolling groove is formed.
　上記した運動案内装置は、２つの部品を組み合わせて成る蓋体の移動体本体に対する位置決め精度を向上させ、長期間の高速使用にも耐えることができる。 The above-described motion guide device improves the positioning accuracy of the cover body, which is a combination of two parts, with respect to the moving body, and can withstand long-term high-speed use.
本発明の第１実施形態におけるリニアガイド１の斜視図である。It is a perspective view of the linear guide 1 in 1st Embodiment of this invention. 本発明の第１実施形態におけるリニアガイド１を正面側から視た部分断面図である。It is the fragmentary sectional view which looked at the linear guide 1 in 1st Embodiment of this invention from the front side. 本発明の第１実施形態におけるエンドプレート２２を内面側から視た図である。It is the figure which looked at the end plate 22 in 1st Embodiment of this invention from the inner surface side. 本発明の第１実施形態におけるエンドプレート２２の分解斜視図である。It is a disassembled perspective view of the end plate 22 in 1st Embodiment of this invention. 図３における矢視Ａ－Ａ断面図である。FIG. 4 is a cross-sectional view taken along line AA in FIG. 3. 本発明の第１実施形態における位置決め部５０の作用を説明するための図である。It is a figure for demonstrating an effect | action of the positioning part 50 in 1st Embodiment of this invention. 本発明の第２実施形態におけるエンドプレート２２を内面側から視た図である。It is the figure which looked at the end plate 22 in 2nd Embodiment of this invention from the inner surface side. 本発明の第２実施形態におけるエンドプレート２２の分解斜視図である。It is a disassembled perspective view of the end plate 22 in 2nd Embodiment of this invention. 図７における矢視Ｂ－Ｂ断面図である。FIG. 8 is a cross-sectional view taken along the line BB in FIG. 本発明の第２実施形態における位置決め部５０ａの作用を説明するための図である。It is a figure for demonstrating an effect | action of the positioning part 50a in 2nd Embodiment of this invention. 本発明の第２実施形態におけるエンドプレート２２の要部拡大図である。It is a principal part enlarged view of the end plate 22 in 2nd Embodiment of this invention. 本発明の第２実施形態における位置決め部５０ｂの作用を説明するための図である。It is a figure for demonstrating an effect | action of the positioning part 50b in 2nd Embodiment of this invention.
　以下、本発明の実施形態について図面を参照して説明する。なお、以下の説明では、運動案内装置としてリニアガイドを例示する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, a linear guide is exemplified as the motion guide device.
　（第１実施形態）
　図１は、本発明の第１実施形態におけるリニアガイド１の斜視図である。図２は、本発明の第１実施形態におけるリニアガイド１を正面側から視た部分断面図である。
　リニアガイド１（運動案内装置）は、図１に示すように、軌道レール１０（軌道体）と、スライダブロック２０（移動体）と、を有する。また、リニアガイド１は、図２に示すように、複数のボール３０（転動体）を有する。 (First embodiment)
FIG. 1 is a perspective view of a linear guide 1 according to the first embodiment of the present invention. FIG. 2 is a partial sectional view of the linear guide 1 according to the first embodiment of the present invention viewed from the front side.
As shown in FIG. 1, the linear guide 1 (motion guide device) includes a track rail 10 (track body) and a slider block 20 (moving body). Moreover, the linear guide 1 has the some ball | bowl 30 (rolling body), as shown in FIG.
　軌道レール１０は、図１に示すように、スライダブロック２０の軌道を形成する。軌道レール１０は、その長手方向に垂直な断面において略矩形状に形成された金属製の部材である。軌道レール１０の側部１１は、その中央が窪んでいる。この窪んだ部分の上側には、軌道レール１０の長手方向に延在する転動体転走溝１２が設けられている。 The track rail 10 forms the track of the slider block 20 as shown in FIG. The track rail 10 is a metal member formed in a substantially rectangular shape in a cross section perpendicular to the longitudinal direction thereof. The center of the side portion 11 of the track rail 10 is recessed. A rolling element rolling groove 12 extending in the longitudinal direction of the track rail 10 is provided above the recessed portion.
　軌道レール１０には、厚み方向に貫通するボルト取付孔１３が、長手方向において間隔をあけて複数形成されている。この軌道レール１０は、ボルト取付孔１３に挿通したボルト（不図示）によりベース部材（不図示）に固定されている。ボルト取付孔１３の開口縁（軌道レール１０の上面）には、ボルトを遮蔽する遮蔽キャップ１４が取り付けられている。 The track rail 10 is formed with a plurality of bolt mounting holes 13 penetrating in the thickness direction at intervals in the longitudinal direction. The track rail 10 is fixed to a base member (not shown) by a bolt (not shown) inserted through the bolt mounting hole 13. A shielding cap 14 that shields the bolt is attached to the opening edge of the bolt attachment hole 13 (the upper surface of the track rail 10).
　スライダブロック２０は、軌道レール１０に沿って移動可能である。スライダブロック２０は、ブロック本体２１（移動体本体）と、ブロック本体２１の端面２１ｓに取り付けられるエンドプレート２２（蓋体）と、を有する。ブロック本体２１は、直方体状に形成されている。ブロック本体２１は、その長手方向における両方の端面２１ｓのそれぞれに平板状のエンドプレート２２がボルト２によって取り付けられている。 The slider block 20 is movable along the track rail 10. The slider block 20 includes a block main body 21 (moving body main body) and an end plate 22 (lid body) attached to the end surface 21 s of the block main body 21. The block main body 21 is formed in a rectangular parallelepiped shape. As for the block main body 21, the flat end plate 22 is attached with the volt | bolt 2 to each of both the end surfaces 21s in the longitudinal direction.
　リニアガイド１には、無端の長円環状又は楕円環状をなす無限循環路Ｌが４つ形成されている。無限循環路Ｌは、長手方向に延びる一対の直線状部分と、この一対の直線状部分の端部同士を連結する一対の半円弧曲線状部分とから構成される。図２に示すように、直線状部分の一方は負荷転動体転走路Ｌ１、他方は無負荷転動体転走路Ｌ２である。一対の半円弧曲線状部分は、転動体方向転換路Ｌ３（後述する図３参照）である。 The linear guide 1 is formed with four endless circulation paths L that are endless oval or elliptical. The infinite circulation path L is composed of a pair of linear portions extending in the longitudinal direction and a pair of semicircular curved portions connecting the ends of the pair of linear portions. As shown in FIG. 2, one of the linear portions is a loaded rolling element rolling path L1, and the other is an unloaded rolling element rolling path L2. The pair of semicircular curved portions are rolling element direction change paths L3 (see FIG. 3 described later).
　ボール３０は、これらの無限循環路Ｌの内部において転走可能に保持される。ボール３０は、例えば金属材料からなる球形部材である。ボール３０は、軌道レール１０とスライダブロック２０（ブロック本体２１）の間に複数介在して、軌道レール１０に対するスライダブロック２０の移動を円滑に行わせるように構成されている。
　複数のボール３０は、無限循環路Ｌの内部にほぼ隙間無く配設されて、無限循環路Ｌを循環する。この複数のボール３０を介して、スライダブロック２０が軌道レール１０に沿って往復移動自在に支持される。 The ball 30 is held inside the infinite circulation path L so as to be able to roll. The ball 30 is a spherical member made of, for example, a metal material. A plurality of balls 30 are interposed between the track rail 10 and the slider block 20 (block body 21) so as to smoothly move the slider block 20 relative to the track rail 10.
The plurality of balls 30 are arranged in the endless circuit L without any gap and circulate through the endless circuit L. The slider block 20 is supported through the plurality of balls 30 so as to be reciprocally movable along the track rail 10.
　複数のボール３０は、例えば帯状のリテーナ３１により等間隔に保持される。リテーナ３１には、長手方向において複数の矩形開口が等間隔に形成されている。この矩形開口にボール３０を収容することにより、複数のボール３０がリテーナ３１に保持されている。
　リテーナ３１自体は有端形であるが、無限循環路Ｌにおいて両端を近接させた無端状に配置されている。これにより、複数のボール３０は、リテーナ３１と共に無限循環路Ｌを循環する。 The plurality of balls 30 are held at equal intervals by, for example, a belt-like retainer 31. In the retainer 31, a plurality of rectangular openings are formed at equal intervals in the longitudinal direction. A plurality of balls 30 are held by the retainer 31 by accommodating the balls 30 in the rectangular openings.
The retainer 31 itself has an end shape, but is disposed in an endless manner in which both ends are brought close to each other in the endless circuit L. Thereby, the plurality of balls 30 circulate in the endless circuit L together with the retainer 31.
　ブロック本体２１は、断面がＣ字形又はＵ字形の門型に形成されている。ブロック本体２１の底面には、レール収容部２３が長手方向に形成されている。このレール収容部２３には、軌道レール１０が僅かな隙間を隔てて収容されている。
　レール収容部２３の一対の内側面２４には、軌道レール１０の側部１１の窪んだ部分に対向するように、突出した部分が形成されている。この突出した部分の上側には、長手方向に延在する負荷転動体転走溝２５が形成されている。一つの内側面２４には、一対の負荷転動体転走溝２５が形成されている。このため、ブロック本体２１には、４つの負荷転動体転走溝２５が形成されている。 The block body 21 is formed in a gate shape having a C-shaped or U-shaped cross section. On the bottom surface of the block main body 21, a rail accommodating portion 23 is formed in the longitudinal direction. In this rail accommodating portion 23, the track rail 10 is accommodated with a slight gap.
Projected portions are formed on the pair of inner side surfaces 24 of the rail housing portion 23 so as to face the recessed portions of the side portions 11 of the track rail 10. A load rolling element rolling groove 25 extending in the longitudinal direction is formed above the protruding portion. A pair of load rolling element rolling grooves 25 are formed on one inner side surface 24. For this reason, four load rolling element rolling grooves 25 are formed in the block main body 21.
　軌道レール１０における転動体転走溝１２とブロック本体２１における負荷転動体転走溝２５は、対向するように配置されている。転動体転走溝１２と負荷転動体転走溝２５の間に形成される空間（長手方向に延在する空間）が負荷転動体転走路Ｌ１となる。また、ブロック本体２１には、無負荷転動体転走路Ｌ２が長手方向に貫通して形成されている。
　無負荷転動体転走路Ｌ２は、４つの負荷転動体転走路Ｌ１に対応して４つ形成されている。 The rolling element rolling groove 12 in the track rail 10 and the loaded rolling element rolling groove 25 in the block body 21 are arranged so as to face each other. A space (a space extending in the longitudinal direction) formed between the rolling element rolling groove 12 and the loaded rolling element rolling groove 25 is a loaded rolling element rolling path L1. The block body 21 is formed with a no-load rolling element rolling path L2 penetrating in the longitudinal direction.
Four unloaded rolling element rolling paths L2 are formed corresponding to the four loaded rolling element rolling paths L1.
　エンドプレート２２は、ブロック本体２１の端面２１ｓに固定される平板状の樹脂成形部材である。エンドプレート２２は、ブロック本体２１と同様に、断面がＣ字形又はＵ字形の門型に形成されている。エンドプレート２２の底面には、レール収容部２６が形成されている。レール収容部２６には、軌道レール１０が僅かな隙間を隔てて収容されている。
　エンドプレート２２のうち、ブロック本体２１の端面２１ｓに密着固定される内面には、後述する転動体方向転換路Ｌ３が形成されている。転動体方向転換路Ｌ３は、負荷転動体転走路Ｌ１と無負荷転動体転走路Ｌ２とを連結する。 The end plate 22 is a flat resin molded member that is fixed to the end surface 21 s of the block body 21. Similar to the block body 21, the end plate 22 is formed in a gate shape having a C-shaped or U-shaped cross section. A rail accommodating portion 26 is formed on the bottom surface of the end plate 22. In the rail accommodating part 26, the track rail 10 is accommodated with a slight gap.
On the inner surface of the end plate 22 that is tightly fixed to the end surface 21s of the block main body 21, a rolling element direction changing path L3 described later is formed. The rolling element direction changing path L3 connects the loaded rolling element rolling path L1 and the unloaded rolling element rolling path L2.
　図３は、本発明の第１実施形態におけるエンドプレート２２を内面側から視た図である。図４は、本発明の第１実施形態におけるエンドプレート２２の分解斜視図である。図５は、図３における矢視Ａ－Ａ断面図である。図６は、本発明の第１実施形態における位置決め部５０の作用を説明するための図である。
　エンドプレート２２は、図３に示すように、無限循環路Ｌの転動体方向転換路Ｌ３を形成する。 FIG. 3 is a view of the end plate 22 in the first embodiment of the present invention as viewed from the inner surface side. FIG. 4 is an exploded perspective view of the end plate 22 in the first embodiment of the present invention. 5 is a cross-sectional view taken along line AA in FIG. FIG. 6 is a view for explaining the operation of the positioning portion 50 in the first embodiment of the present invention.
The end plate 22 forms the rolling element direction change path L3 of the infinite circuit L as shown in FIG.
　転動体方向転換路Ｌ３は、４つの負荷転動体転走路Ｌ１及び無負荷転動体転走路Ｌ２に対応して４つ形成されている。また、エンドプレート２２には、ボルト２（図１、図２参照）が挿通するボルト挿通孔２７と、不図示の給脂装置と接続されて外部から潤滑剤が供給されてくる給脂孔２８と、給脂孔２８に連通する給脂溝２９と、が形成されている。給脂溝２９を流通した潤滑剤は、ブロック本体２１の負荷転動体転走溝２５等に供給される。 Four rolling element direction change paths L3 are formed corresponding to the four loaded rolling element rolling paths L1 and the no-load rolling element rolling path L2. Further, the end plate 22 is connected to a bolt insertion hole 27 through which the bolt 2 (see FIGS. 1 and 2) is inserted, and a grease supply hole 28 that is connected to a greasing device (not shown) and is supplied with lubricant from the outside. And a greasing groove 29 communicating with the greasing hole 28 is formed. The lubricant that has passed through the greasing groove 29 is supplied to the load rolling element rolling groove 25 of the block body 21 and the like.
　エンドプレート２２は、図４に示すように、インナープレート４０（転動体方向転換内周案内部）及びアウタープレート４１（転動体方向転換外周案内部）が組み合わされて構成されている。インナープレート４０は、半円弧曲線状の転動体方向転換路Ｌ３の内周を形成する。インナープレート４０には、負荷転動体転走路Ｌ１からボール３０をすくい上げるすくい部４０ａが形成されている。また、このインナープレート４０には、給脂孔２８ａと、給脂溝２９と、が形成されている。アウタープレート４１は、半円弧曲線状の転動体方向転換路Ｌ３の外周を形成する。このアウタープレート４１は、ボルト挿通孔２７と、給脂孔２８ａに連通する給脂孔２８ｂと、が形成されている。 As shown in FIG. 4, the end plate 22 is configured by combining an inner plate 40 (rolling member direction changing inner periphery guide portion) and an outer plate 41 (rolling member direction changing outer periphery guide portion). The inner plate 40 forms the inner periphery of the rolling element direction changing path L3 having a semicircular arc shape. The inner plate 40 is formed with a scoop portion 40a that scoops up the ball 30 from the loaded rolling element rolling path L1. Further, the inner plate 40 is formed with a greasing hole 28 a and a greasing groove 29. The outer plate 41 forms the outer periphery of the rolling element direction changing path L3 having a semicircular arc shape. The outer plate 41 has a bolt insertion hole 27 and a greasing hole 28b communicating with the greasing hole 28a.
　エンドプレート２２は、図５に示すように、ブロック本体２１の端面２１ｓに対してインナープレート４０が密着固定され、その外側を覆うようにしてアウタープレート４１が固定されることで取り付けられている。このエンドプレート２２のブロック本体２１に対する位置決めは、位置決め部５０によって行われる。位置決め部５０は、位置決め溝５１と、位置決め突起５２と、突起拡張部５３と、を有する。 As shown in FIG. 5, the end plate 22 is attached by the inner plate 40 being closely fixed to the end surface 21 s of the block main body 21 and the outer plate 41 being fixed so as to cover the outside. The positioning of the end plate 22 with respect to the block body 21 is performed by the positioning unit 50. The positioning part 50 includes a positioning groove 51, a positioning protrusion 52, and a protrusion extension part 53.
　位置決め溝５１は、ブロック本体２１の端面２１ｓに設けられている。位置決め溝５１は、エンドプレート２２をブロック本体２１に位置決めするために形成される。本実施形態では、位置決め溝５１は、円形の孔からなる。この位置決め溝５１は、端面２１ｓに対し垂直な方向に所定深さで形成されている。 The positioning groove 51 is provided on the end surface 21 s of the block main body 21. The positioning groove 51 is formed to position the end plate 22 on the block main body 21. In the present embodiment, the positioning groove 51 is a circular hole. The positioning groove 51 is formed with a predetermined depth in a direction perpendicular to the end surface 21s.
　位置決め突起５２は、図４及び図５に示すように、アウタープレート４１（一方）に設けられている。この位置決め突起５２は、アウタープレート４１に複数設けられており、互いに間隔をあけて配設されている。本実施形態では、図３に示すように、３つの位置決め突起５２が、１２０°間隔で円形に配設されている。また、複数の位置決め突起５２の端面は、円弧状に形成されている。この複数の位置決め突起５２は、図５に示すように、位置決め溝５１に挿入可能な長さで形成されている。 The positioning protrusion 52 is provided on the outer plate 41 (one side) as shown in FIGS. 4 and 5. A plurality of the positioning protrusions 52 are provided on the outer plate 41 and are spaced from each other. In the present embodiment, as shown in FIG. 3, the three positioning protrusions 52 are arranged in a circle at intervals of 120 °. Further, the end faces of the plurality of positioning protrusions 52 are formed in an arc shape. As shown in FIG. 5, the plurality of positioning protrusions 52 are formed with a length that can be inserted into the positioning groove 51.
　複数の位置決め突起５２は、少なくとも径方向に弾性変形可能な構成となっている。本実施形態の複数の位置決め突起５２は、アウタープレート４１と一体で樹脂成形されており、所定のバネ性を有する。また、図５に示すように、この複数の位置決め突起５２の周りには、端面２１ｓに対して凹んだ逃がし溝５４が設けられている。逃がし溝５４は、位置決め突起５２の長さを確保すると共に、位置決め突起５２の弾性変形を可能する空間を確保する。 The plurality of positioning protrusions 52 are configured to be elastically deformable at least in the radial direction. The plurality of positioning protrusions 52 of the present embodiment are resin-molded integrally with the outer plate 41 and have a predetermined spring property. As shown in FIG. 5, relief grooves 54 that are recessed with respect to the end surface 21 s are provided around the plurality of positioning protrusions 52. The escape groove 54 ensures the length of the positioning protrusion 52 and also secures a space in which the positioning protrusion 52 can be elastically deformed.
　突起拡張部５３は、図４及び図５に示すように、インナープレート４０（他方）に設けられている。この突起拡張部５３は、複数の位置決め突起５２の間隔を拡張させるようにアウタープレート４１に係合する。本実施形態の突起拡張部５３は、複数の位置決め突起５２のそれぞれと係合する複数の係合孔５５を有する。本実施形態では、図３に示すように、３つの位置決め突起５２に対応して、３つの係合孔５５が設けられている。係合孔５５は、位置決め突起５２の端面形状に対応して円弧状に形成されている。また、係合孔５５は、位置決め突起５２よりも一回り大きく形成されている。 The protrusion extension 53 is provided on the inner plate 40 (the other) as shown in FIGS. The protrusion expanding portion 53 engages with the outer plate 41 so as to expand the interval between the plurality of positioning protrusions 52. The protrusion expanding portion 53 of the present embodiment has a plurality of engagement holes 55 that engage with each of the plurality of positioning protrusions 52. In the present embodiment, as shown in FIG. 3, three engagement holes 55 are provided corresponding to the three positioning protrusions 52. The engagement hole 55 is formed in an arc shape corresponding to the end surface shape of the positioning protrusion 52. Further, the engagement hole 55 is formed to be slightly larger than the positioning protrusion 52.
　この複数の係合孔５５は、図３に示すように、円形に配設されている複数の位置決め突起５２に対応し、周方向において１２０°間隔で配設されている。また、係合孔５５は、径方向において複数の位置決め突起５２よりも僅かながら外側に配設されている。このため、複数の係合孔５５のそれぞれに複数の位置決め突起５２が挿入されると、複数の位置決め突起５２には、径方向外側に開くような荷重が加わり、隣り合う位置決め突起５２の間隔が拡張する。突起拡張部５３は、図６に示すように、複数の位置決め突起５２の先端が位置決め溝５１の径よりも外側に拡張するように荷重を加える。 As shown in FIG. 3, the plurality of engagement holes 55 correspond to the plurality of positioning protrusions 52 arranged in a circle, and are arranged at intervals of 120 ° in the circumferential direction. The engagement hole 55 is disposed slightly outside the plurality of positioning protrusions 52 in the radial direction. For this reason, when a plurality of positioning projections 52 are inserted into each of the plurality of engagement holes 55, a load is applied to the plurality of positioning projections 52 so as to open radially outward, and the interval between adjacent positioning projections 52 is increased. Expand. As shown in FIG. 6, the protrusion expanding portion 53 applies a load so that the tips of the plurality of positioning protrusions 52 expand outward from the diameter of the positioning groove 51.
　この突起拡張部５３は、図５に示すように、位置決め溝５１に対し、複数の位置決め突起５２の挿入方向において端面２１ｓよりも手前に設けられている。すなわち、突起拡張部５３は、ブロック本体２１の端面２１ｓより手前に位置し、端面２１ｓと平行な方向（図５に示す紙面上下方向）において、位置決め溝５１とは重ならないような配置となっている。すなわち、複数の位置決め突起５２は、位置決め溝５１及び突起拡張部５３によって、内側と外側とが重ならないように挟み込まれる。このため、複数の位置決め突起５２は、所定のバネ性で位置決め溝５１に押し当てられる。 As shown in FIG. 5, the protrusion expanding portion 53 is provided in front of the end surface 21 s in the insertion direction of the plurality of positioning protrusions 52 with respect to the positioning groove 51. That is, the protrusion extending portion 53 is positioned in front of the end surface 21s of the block main body 21, and is arranged so as not to overlap the positioning groove 51 in a direction parallel to the end surface 21s (the vertical direction in the drawing of FIG. 5). Yes. That is, the plurality of positioning protrusions 52 are sandwiched by the positioning grooves 51 and the protrusion expanding portions 53 so that the inner side and the outer side do not overlap. Therefore, the plurality of positioning protrusions 52 are pressed against the positioning groove 51 with a predetermined spring property.
　この位置決め部５０は、図３に示すように、門型に形成されたインナープレート４０の角部４２に対応する位置に設けられており、本実施形態では二箇所に設けられている。
　続いて、上記構成の位置決め部５０による作用について説明する。 As shown in FIG. 3, the positioning portion 50 is provided at a position corresponding to the corner portion 42 of the inner plate 40 formed in a gate shape, and is provided at two locations in the present embodiment.
Next, the operation of the positioning unit 50 configured as described above will be described.
　位置決め部５０は、図５に示すように、ブロック本体２１の端面２１ｓに設けられた位置決め溝５１と、アウタープレート４１に設けられた複数の位置決め突起５２と、インナープレート４０に設けられた突起拡張部５３と、を有する。突起拡張部５３は、図３及び図４に示すように、アウタープレート４１に係合可能であり、突起拡張部５３における係合によって、インナープレート４０とアウタープレート４１との位置決めが行われる。 As shown in FIG. 5, the positioning unit 50 includes a positioning groove 51 provided on the end surface 21 s of the block body 21, a plurality of positioning protrusions 52 provided on the outer plate 41, and a protrusion extension provided on the inner plate 40. Part 53. As shown in FIGS. 3 and 4, the protrusion extension portion 53 can be engaged with the outer plate 41, and the inner plate 40 and the outer plate 41 are positioned by the engagement of the protrusion extension portion 53.
　本実施形態では、突起拡張部５３は、複数の位置決め突起５２のそれぞれと係合する複数の係合孔５５を有している。複数の位置決め突起５２のそれぞれと、複数の係合孔５５のそれぞれとを係合させると、図６に示すように、複数の位置決め突起５２のそれぞれを独立して径方向外側に押し広げることができる。このように、一つの位置決め突起５２に対し、一つの係合孔５５が係合することで、複数の位置決め突起５２が拡張変形する際の形状安定性を高めることができる。 In the present embodiment, the protrusion expanding portion 53 has a plurality of engagement holes 55 that engage with each of the plurality of positioning protrusions 52. When each of the plurality of positioning projections 52 is engaged with each of the plurality of engagement holes 55, each of the plurality of positioning projections 52 can be independently pushed outward in the radial direction as shown in FIG. it can. As described above, when one engaging hole 55 is engaged with one positioning protrusion 52, the shape stability when the plurality of positioning protrusions 52 are expanded and deformed can be enhanced.
　複数の位置決め突起５２の先端は、位置決め溝５１に挿入されている。このため、複数の位置決め突起５２は、押し広げられる方向（径方向外側）と逆方向（径方向内側：図６において矢印で示す）に押え込まれる。また、複数の位置決め突起５２は、その押え込まれた分のバネ荷重で位置決め溝５１に押し当てられる。これにより、ブロック本体２１とアウタープレート４１との位置決めが行われる。ここで、複数の位置決め突起５２が位置決め溝５１に押し当てられるのは、インナープレート４０の突起拡張部５３による拡張作用である。このため、ブロック本体２１に対するアウタープレート４１の位置決めは、ブロック本体２１に対するインナープレート４０の位置決めとみなすことができる。 The tips of the plurality of positioning protrusions 52 are inserted into the positioning grooves 51. For this reason, the plurality of positioning protrusions 52 are pressed in a direction opposite to the direction in which they are spread (outside in the radial direction) (inside in the radial direction: indicated by arrows in FIG. 6). Further, the plurality of positioning protrusions 52 are pressed against the positioning groove 51 by the spring load corresponding to the pressed position. Thereby, positioning with respect to the block main body 21 and the outer plate 41 is performed. Here, the plurality of positioning protrusions 52 are pressed against the positioning grooves 51 due to the expansion action by the protrusion expansion portion 53 of the inner plate 40. For this reason, the positioning of the outer plate 41 with respect to the block body 21 can be regarded as the positioning of the inner plate 40 with respect to the block body 21.
　したがって、上記構成の位置決め部５０によれば、ブロック本体２１に対するインナープレート４０とアウタープレート４１との誤差累積を小さくすることができる。このため、ブロック本体２１の端面２１ｓにエンドプレート２２を取り付ける際に、エンドプレート２２に形成された転動体方向転換路Ｌ３と、ブロック本体２１に形成された負荷転動体転走路Ｌ１及び無負荷転動体転走路Ｌ２と、の接続部分に段差が生じないように、エンドプレート２２をブロック本体２１に対して正確に位置決めすることができる。また、インナープレート４０には、ボール３０を転動体方向転換路Ｌ３にすくい上げるすくい部４０ａが設けられている。しかしながら、部品誤差の累積が少ないため、ボール３０とすくい部４０ａとの接触位置がばらつくことがなくなり、高速使用においても部品寿命が長くなる。 Therefore, according to the positioning unit 50 configured as described above, the error accumulation between the inner plate 40 and the outer plate 41 with respect to the block body 21 can be reduced. For this reason, when attaching the end plate 22 to the end surface 21s of the block main body 21, the rolling element direction changing path L3 formed in the end plate 22, the loaded rolling element rolling path L1 formed in the block main body 21, and the no-load rolling The end plate 22 can be accurately positioned with respect to the block main body 21 so that a step does not occur at the connecting portion with the moving body rolling path L2. The inner plate 40 is provided with a scooping portion 40a that scoops the ball 30 up to the rolling element direction changing path L3. However, since the accumulation of component errors is small, the contact position between the ball 30 and the rake portion 40a does not vary, and the component life is extended even at high speed use.
　また、本実施形態では、図５に示すように、突起拡張部５３は、位置決め溝５１に対し、端面２１ｓよりも手前に設けられている。この構成によれば、位置決め溝５１と、突起拡張部５３とが重なることを避けて、位置決め突起５２にバネ性を付与することができる。このように、位置決め溝５１と突起拡張部５３との間に挟まれる位置決め突起５２に、バネ性を付与することで、部品誤差の累積を防ぐと共に簡易且つ確実に位置決めでき、また、部品を嵌めるだけで全ての位置が決まるため組み立て性が良くなる。
　さらに、本実施形態では、複数の位置決め突起５２の周りに設けられ、端面２１ｓに対して凹んだ逃がし溝５４を有する。この構成によれば、位置決め突起５２の長さを確保でき弾性変形が容易に可能となるため、位置決め突起５２が位置決め溝５１と突起拡張部５３との間に挟まれてもバネ性を十分に維持することができる。 In the present embodiment, as shown in FIG. 5, the protrusion extension portion 53 is provided in front of the end surface 21 s with respect to the positioning groove 51. According to this configuration, the positioning groove 51 and the protrusion extension portion 53 can be avoided from overlapping and the positioning protrusion 52 can be provided with a spring property. In this way, by providing the positioning protrusion 52 sandwiched between the positioning groove 51 and the protrusion extension portion 53 with a spring property, it is possible to prevent the accumulation of component errors and to easily and reliably position the component, and to fit the component. As a result, all the positions are determined, so the assemblability is improved.
Further, in the present embodiment, there are escape grooves 54 provided around the plurality of positioning protrusions 52 and recessed with respect to the end surface 21s. According to this configuration, the length of the positioning protrusion 52 can be secured and elastic deformation can be easily performed. Therefore, even if the positioning protrusion 52 is sandwiched between the positioning groove 51 and the protrusion expanding portion 53, the spring property is sufficiently obtained. Can be maintained.
　また、本実施形態では、図３に示すように、インナープレート４０は、門型に形成されている。インナープレート４０には、位置決め溝５１と、複数の位置決め突起５２と、突起拡張部５３と、を有する位置決め部５０が、インナープレート４０の角部４２に対応する位置に設けられている。インナープレート４０の角部４２は、樹脂成形の際の変形が比較的少ない部分である。すなわち、インナープレート４０は、樹脂成型の際に、角部４２を支点として両足が開くまたは閉じるように変形し易い。したがって、この角部４２に対応する位置（変形の支点となる位置）に位置決め部５０を設ける。これによって、位置決め精度をより向上させることができる。また、スライダブロック２０も門型に形成されており、同じようにその角部を支点として両足が開くまたは閉じるように変形し易い。このため、上記のように角部４２に対応する位置に位置決め部５０を設けることによって、位置決め精度をより向上させることができる。 In the present embodiment, as shown in FIG. 3, the inner plate 40 is formed in a gate shape. In the inner plate 40, a positioning portion 50 having a positioning groove 51, a plurality of positioning protrusions 52, and a protrusion extension portion 53 is provided at a position corresponding to the corner portion 42 of the inner plate 40. The corner portion 42 of the inner plate 40 is a portion that undergoes relatively little deformation during resin molding. That is, the inner plate 40 is easily deformed so that both feet open or close with the corner portion 42 as a fulcrum during resin molding. Therefore, the positioning portion 50 is provided at a position corresponding to the corner portion 42 (a position serving as a fulcrum for deformation). Thereby, the positioning accuracy can be further improved. Further, the slider block 20 is also formed in a gate shape, and similarly, the slider block 20 is easily deformed so that both legs are opened or closed with the corner portion as a fulcrum. For this reason, positioning accuracy can be improved more by providing the positioning part 50 in the position corresponding to the corner | angular part 42 as mentioned above.
　以上説明したように、本実施形態によれば、リニアガイド１は、軌道レール１０と、軌道レール１０に沿って移動可能なスライダブロック２０と、軌道レール１０とスライダブロック２０とによって形成された無限循環路Ｌを転走する複数のボール３０と、を有する。スライダブロック２０は、ブロック本体２１と、ブロック本体２１の端面２１ｓに取り付けられて無限循環路Ｌの転動体方向転換路Ｌ３を形成するエンドプレート２２と、を有する。エンドプレート２２は、インナープレート４０及びアウタープレート４１が組み合わされて成り、ブロック本体２１の端面２１ｓに設けられる。また、エンドプレート２２は、エンドプレート２２を位置決めするための位置決め溝５１と、インナープレート４０及びアウタープレート４１のうちの一方に設けられ、位置決め溝５１に挿入可能な複数の位置決め突起５２と、インナープレート４０及びアウタープレート４１のうちの他方に設けられ、複数の位置決め突起５２の間隔を拡張させるように一方に係合し、複数の位置決め突起５２を位置決め溝５１に押し当てる突起拡張部５３と、を有する。この構成によって、２つの部品を組み合わせて成るエンドプレート２２のブロック本体２１に対する位置決め精度を向上させ、長期間の高速使用にも耐え得るリニアガイド１が得られる。 As described above, according to the present embodiment, the linear guide 1 is infinitely formed by the track rail 10, the slider block 20 movable along the track rail 10, and the track rail 10 and the slider block 20. And a plurality of balls 30 rolling on the circulation path L. The slider block 20 includes a block main body 21 and an end plate 22 that is attached to the end surface 21 s of the block main body 21 and forms a rolling element direction changing path L3 of the infinite circulation path L. The end plate 22 is formed by combining an inner plate 40 and an outer plate 41, and is provided on the end surface 21 s of the block body 21. The end plate 22 includes a positioning groove 51 for positioning the end plate 22, a plurality of positioning protrusions 52 provided in one of the inner plate 40 and the outer plate 41 and insertable into the positioning groove 51, and an inner plate A protrusion extending portion 53 that is provided on the other of the plate 40 and the outer plate 41, engages with one of the plurality of positioning protrusions 52 so as to expand the interval between the positioning protrusions 52, and presses the positioning protrusions 52 against the positioning grooves 51; Have With this configuration, the linear guide 1 that improves the positioning accuracy of the end plate 22 formed by combining two parts with respect to the block main body 21 and can withstand high-speed use for a long period of time can be obtained.
　（第２実施形態）
　次に、本発明の第２実施形態について説明する。以下の説明において、上述の実施形態と同一又は同等の構成部分については同一の符号を付し、その説明を簡略若しくは省略する。 (Second Embodiment)
Next, a second embodiment of the present invention will be described. In the following description, the same or equivalent components as those of the above-described embodiment are denoted by the same reference numerals, and the description thereof is simplified or omitted.
　図７は、本発明の第２実施形態におけるエンドプレート２２を内面側から視た図である。図８は、本発明の第２実施形態におけるエンドプレート２２の分解斜視図である。図９は、図７における矢視Ｂ－Ｂ断面図である。図１０は、本発明の第２実施形態における位置決め部５０ａの作用を説明する図である。図１１は、本発明の第２実施形態におけるエンドプレート２２の要部拡大図である。図１２は、本発明の第２実施形態における位置決め部５０ｂの作用を説明する図である。
　図７に示すように、第２実施形態では、位置決め部５０ａ，５０ｂを有する点で、上記実施形態と異なる。以下説明する位置決め部５０ａ，５０ｂは、いずれか一方のみが設けられている構成であってもよい。 FIG. 7 is a view of the end plate 22 in the second embodiment of the present invention as viewed from the inner surface side. FIG. 8 is an exploded perspective view of the end plate 22 in the second embodiment of the present invention. 9 is a cross-sectional view taken along the line BB in FIG. FIG. 10 is a diagram for explaining the operation of the positioning portion 50a in the second embodiment of the present invention. FIG. 11 is an enlarged view of a main part of the end plate 22 in the second embodiment of the present invention. FIG. 12 is a diagram for explaining the operation of the positioning portion 50b in the second embodiment of the present invention.
As shown in FIG. 7, the second embodiment is different from the above-described embodiment in that it includes positioning portions 50a and 50b. Only one of the positioning portions 50a and 50b described below may be provided.
　位置決め部５０ａは、図９に示すように、位置決め溝５１ａと、位置決め突起５２ａと、突起拡張部５３ａと、を有する。
　位置決め溝５１ａは、ブロック本体２１の端面２１ｓに設けられた円形の孔である。
　位置決め突起５２ａは、図８に示すように、インナープレート４０（一方）に設けられており、図７に示すように、互いに間隔をあけて複数（３つ）配設されている。この複数の位置決め突起５２ａは、図９に示すように、位置決め溝５１ａに挿入可能な長さで形成されている。 As shown in FIG. 9, the positioning part 50a has a positioning groove 51a, a positioning protrusion 52a, and a protrusion extension part 53a.
The positioning groove 51 a is a circular hole provided in the end surface 21 s of the block body 21.
As shown in FIG. 8, the positioning protrusions 52a are provided on the inner plate 40 (one side), and as shown in FIG. 7, a plurality (three) of the positioning protrusions 52a are arranged at intervals. As shown in FIG. 9, the plurality of positioning protrusions 52a are formed with a length that can be inserted into the positioning groove 51a.
　複数の位置決め突起５２ａは、インナープレート４０と一体で樹脂成形されており、所定のバネ性を有する。また、この複数の位置決め突起５２ａの周りには、端面２１ｓに対して凹んだ逃がし溝５４ａが設けられている。
　突起拡張部５３ａは、図８に示すように、アウタープレート４１（他方）に設けられている。この突起拡張部５３ａは、複数の位置決め突起５２ａの間隔を拡張させるようにインナープレート４０に係合する。本実施形態の突起拡張部５３ａは、複数の位置決め突起５２ａの間に圧入する係合突起５６ａを有する。 The plurality of positioning projections 52a are integrally molded with the inner plate 40 and have a predetermined spring property. Further, an escape groove 54a that is recessed with respect to the end surface 21s is provided around the plurality of positioning protrusions 52a.
As shown in FIG. 8, the protrusion extension portion 53 a is provided on the outer plate 41 (the other). The protrusion expanding portion 53a engages with the inner plate 40 so as to expand the interval between the plurality of positioning protrusions 52a. The protrusion extension 53a of the present embodiment has an engagement protrusion 56a that is press-fitted between the plurality of positioning protrusions 52a.
　インナープレート４０には、係合突起５６ａが圧入する圧入孔５７ａが設けられている。図７に示すように、圧入孔５７ａの周りには、複数の位置決め突起５２ａが配設されている。係合突起５６ａは、圧入孔５７ａよりも僅かに大きな外形を有している。このため、圧入孔５７ａに係合突起５６ａが圧入されると、複数の位置決め突起５２ａには、径方向外側に開くような荷重が加わり、隣り合う位置決め突起５２ａの間隔が拡張する。
　この位置決め部５０ａは、門型に樹脂成形されたインナープレート４０の角部４２に対応する位置に設けられている。位置決め部５０ａは、本実施形態では二箇所に設けられている。 The inner plate 40 is provided with a press-fitting hole 57a into which the engaging protrusion 56a is press-fitted. As shown in FIG. 7, a plurality of positioning protrusions 52a are disposed around the press-fit hole 57a. The engagement protrusion 56a has an outer shape slightly larger than the press-fitting hole 57a. For this reason, when the engagement protrusion 56a is press-fitted into the press-fitting hole 57a, a load that opens radially outward is applied to the plurality of positioning protrusions 52a, and the interval between the adjacent positioning protrusions 52a is expanded.
The positioning portion 50a is provided at a position corresponding to the corner portion 42 of the inner plate 40 that is resin-molded into a portal shape. The positioning part 50a is provided in two places in this embodiment.
　上記構成の位置決め部５０ａによれば、突起拡張部５３ａが、複数の位置決め突起５２の間に圧入される係合突起５６ａを有している。このため、圧入孔５７ａに係合突起５６ａを圧入すると、図１０に示すように、複数の位置決め突起５２ａのそれぞれを径方向外側に押し広げることができる。このように、一つの係合突起５６ａによって、複数の位置決め突起５２ａの間隔を拡張させることができるため、上記実施形態よりも突起拡張部５３ａの構造を簡単化できる。 According to the positioning portion 50a having the above-described configuration, the protrusion expanding portion 53a has the engagement protrusion 56a that is press-fitted between the plurality of positioning protrusions 52. For this reason, when the engagement protrusion 56a is press-fitted into the press-fitting hole 57a, each of the plurality of positioning protrusions 52a can be pushed outward in the radial direction, as shown in FIG. As described above, since the interval between the plurality of positioning protrusions 52a can be expanded by the single engaging protrusion 56a, the structure of the protrusion expanding portion 53a can be simplified as compared with the above embodiment.
　また、複数の位置決め突起５２ａの先端は、位置決め溝５１ａに挿入されているため、複数の位置決め突起５２ａは、押し広げられる方向（径方向外側）と逆方向（径方向内側：図１０において矢印で示す）に押え込まれる。複数の位置決め突起５２ａは、その押え込まれた分のバネ荷重で位置決め溝５１ｂに押し当てられる。したがって、上記構成の位置決め部５０ａによれば、上記実施形態と同様に、ブロック本体２１に対するインナープレート４０とアウタープレート４１との誤差累積を小さくすることができる。 Moreover, since the front-end | tip of the several positioning protrusion 52a is inserted in the positioning groove 51a, the several positioning protrusion 52a is the direction (diameter direction outer side) and the direction (radial direction inner side: FIG. Is shown). The plurality of positioning protrusions 52a are pressed against the positioning grooves 51b with the spring load corresponding to the pressed positions. Therefore, according to the positioning part 50a having the above configuration, the error accumulation between the inner plate 40 and the outer plate 41 with respect to the block main body 21 can be reduced as in the above embodiment.
　一方、位置決め部５０ｂは、図１１に示すように、位置決め溝５１ｂと、位置決め突起５２ｂと、突起拡張部５３ｂと、を有する。
　位置決め溝５１ｂは、端面２１ｓからブロック本体２１の長手方向に延在する略Ｖ字状の溝である。この位置決め溝５１ｂは、図１２に示すように、負荷転動体転走溝２５が形成された面と同一の面（ブロック本体２１の内側面２４）に設けられている。 On the other hand, as shown in FIG. 11, the positioning part 50b has a positioning groove 51b, a positioning protrusion 52b, and a protrusion expanding part 53b.
The positioning groove 51b is a substantially V-shaped groove extending in the longitudinal direction of the block body 21 from the end surface 21s. As shown in FIG. 12, the positioning groove 51 b is provided on the same surface (the inner surface 24 of the block body 21) as the surface on which the load rolling element rolling groove 25 is formed.
　位置決め突起５２ｂは、図８に示すように、インナープレート４０（一方）に設けられている。位置決め突起５２ｂは、図７に示すように、互いに間隔をあけて複数（２つ）配設されている。この複数の位置決め突起５２ｂは、図１１に示すように、位置決め溝５１ｂに挿入可能な長さで形成されている。複数の位置決め突起５２ｂは、インナープレート４０と一体で樹脂成形されており、所定のバネ性を有する。この複数の位置決め突起５２ｂの周りには、端面２１ｓに対して凹んだ逃がし溝５４ｂが設けられている。 The positioning projection 52b is provided on the inner plate 40 (one side) as shown in FIG. As shown in FIG. 7, a plurality (two) of the positioning protrusions 52b are arranged at intervals. As shown in FIG. 11, the plurality of positioning protrusions 52b are formed with a length that can be inserted into the positioning groove 51b. The plurality of positioning projections 52b are integrally molded with the inner plate 40 and have a predetermined spring property. Around the plurality of positioning protrusions 52b, relief grooves 54b recessed with respect to the end surface 21s are provided.
　突起拡張部５３ｂは、図８に示すように、アウタープレート４１（他方）に設けられている。この突起拡張部５３ｂは、複数の位置決め突起５２ｂの間隔を拡張させるようにインナープレート４０に係合する。本実施形態の突起拡張部５３ｂは、複数の位置決め突起５２ｂの間に圧入する係合突起５６ｂを有する。インナープレート４０には、係合突起５６ｂが圧入する圧入溝５７ｂが設けられている。圧入溝５７ｂは、図１２に示すように、略五角形に形成されており、その五角形の頂部が隣り合う位置決め突起５２ｂの間に挿入されるように配設されている。 The protrusion extension part 53b is provided in the outer plate 41 (the other) as shown in FIG. The protrusion extending portion 53b engages with the inner plate 40 so as to expand the interval between the plurality of positioning protrusions 52b. The projection extension 53b of the present embodiment has an engagement projection 56b that is press-fitted between the plurality of positioning projections 52b. The inner plate 40 is provided with a press-fit groove 57b into which the engagement protrusion 56b is press-fitted. As shown in FIG. 12, the press-fit groove 57 b is formed in a substantially pentagonal shape, and is arranged so that the top of the pentagon is inserted between the adjacent positioning protrusions 52 b.
　係合突起５６ｂは、圧入溝５７ｂよりも僅かに大きな外形を有している。このため、図１１に示すように、圧入溝５７ｂに係合突起５６ｂが圧入されると、複数の位置決め突起５２ｂには、径方向外側に開くような荷重が加わり、隣り合う位置決め突起５２ｂの間隔が拡張する。
　この位置決め部５０ｂは、図７に示すように、エンドプレート２２において隣り合う転動体方向転換路Ｌ３の間に対応する位置に設けられており、本実施形態では二箇所に設けられている。 The engaging protrusion 56b has an outer shape slightly larger than the press-fitting groove 57b. For this reason, as shown in FIG. 11, when the engaging protrusions 56b are press-fitted into the press-fit grooves 57b, a load that opens radially outward is applied to the plurality of positioning protrusions 52b, and the spacing between the adjacent positioning protrusions 52b is increased. Expands.
As shown in FIG. 7, the positioning portion 50 b is provided at a position corresponding to between the adjacent rolling element direction change paths L <b> 3 in the end plate 22, and is provided at two locations in the present embodiment.
　上記構成の位置決め部５０ｂによれば、突起拡張部５３ｂが、複数の位置決め突起５２の間に圧入する係合突起５６ｂを有している。このため、圧入溝５７ｂに係合突起５６ｂを圧入すると、図１２に示すように、複数の位置決め突起５２ｂのそれぞれを径方向外側に押し広げることができる。このように、一つの係合突起５６ｂによって、複数の位置決め突起５２ｂの間隔を拡張させることができるため、位置決め部５０ａと同様に突起拡張部５３ｂの構造を簡単化できる。 According to the positioning part 50b configured as described above, the protrusion extension part 53b has the engaging protrusions 56b that are press-fitted between the plurality of positioning protrusions 52. For this reason, when the engagement protrusion 56b is press-fitted into the press-fitting groove 57b, each of the plurality of positioning protrusions 52b can be pushed outward in the radial direction as shown in FIG. As described above, since the interval between the plurality of positioning protrusions 52b can be expanded by the single engaging protrusion 56b, the structure of the protrusion expanding portion 53b can be simplified similarly to the positioning portion 50a.
　また、複数の位置決め突起５２ｂの先端は、位置決め溝５１ｂに挿入されている。そのため、複数の位置決め突起５２ｂは、押し広げられる方向と逆方向（図１２において矢印で示す）に押え込まれ、その押え込まれた分のバネ荷重で位置決め溝５１ｂに押し当てられる。したがって、上記構成の位置決め部５０ｂによれば、上記実施形態と同様に、ブロック本体２１に対するインナープレート４０とアウタープレート４１との誤差累積を小さくすることができる。 Further, the tips of the plurality of positioning protrusions 52b are inserted into the positioning grooves 51b. Therefore, the plurality of positioning protrusions 52b are pressed in the direction opposite to the direction in which they are spread (indicated by arrows in FIG. 12), and are pressed against the positioning groove 51b with the spring load corresponding to the pressed-in. Therefore, according to the positioning part 50b having the above-described configuration, the error accumulation between the inner plate 40 and the outer plate 41 with respect to the block main body 21 can be reduced as in the above embodiment.
　また、本実施形態では、図７に示すように、エンドプレート２２には、転動体方向転換路Ｌ３が隣り合って設けられており、位置決め部５０ｂは、隣り合う転動体方向転換路Ｌ３の間に対応する位置に設けられている。この構成によれば、エンドプレート２２に形成された転動体方向転換路Ｌ３と、ブロック本体２１に形成された負荷転動体転走路Ｌ１及び無負荷転動体転走路Ｌ２との接続部分の近傍において、エンドプレート２２をブロック本体２１に対して正確に位置決めすることができ、当該接続部分における微小な段差をより小さくすることができる。 Moreover, in this embodiment, as shown in FIG. 7, the end plate 22 is provided with the rolling element direction change path L3 adjacent to each other, and the positioning portion 50b is located between the adjacent rolling element direction change paths L3. Is provided at a position corresponding to. According to this configuration, in the vicinity of the connecting portion between the rolling element direction changing path L3 formed in the end plate 22 and the loaded rolling element rolling path L1 and the no-load rolling element rolling path L2 formed in the block body 21, The end plate 22 can be accurately positioned with respect to the block main body 21, and a minute step at the connection portion can be further reduced.
　さらに、本実施形態では、図１２に示すように、位置決め溝５１ｂは、負荷転動体転走溝２５が形成された面と同一の内側面２４に設けられている。この構成によれば、位置決め溝５１ｂと負荷転動体転走溝２５とを同時研削できる。このため、負荷転動体転走溝２５との精度が最も良い同時研削面を有する位置決め溝５１ｂを基準として、インナープレート４０とアウタープレート４１とを精度よく位置決めでき、よりガタが無い構造とすることができる。このため、すくい部４０ａとボール３０の接触位置が安定し、すくい部４０ａにおいて強度が確保された部分に確実にボール３０を当てることができ、高速使用におけるすくい部４０ａの破損等を確実に防ぐことができる。 Furthermore, in this embodiment, as shown in FIG. 12, the positioning groove 51b is provided on the same inner side surface 24 as the surface on which the load rolling element rolling groove 25 is formed. According to this configuration, the positioning groove 51b and the loaded rolling element rolling groove 25 can be ground simultaneously. For this reason, the inner plate 40 and the outer plate 41 can be positioned accurately with reference to the positioning groove 51b having the simultaneous grinding surface with the best accuracy with the loaded rolling element rolling groove 25, and a structure with less play is provided. Can do. For this reason, the contact position between the rake portion 40a and the ball 30 is stabilized, and the ball 30 can be reliably applied to a portion where the strength is secured in the rake portion 40a. be able to.
　以上、図面を参照しながら本発明の好適な実施形態について説明したが、本発明は上記実施形態に限定されるものではない。上述した実施形態において示した各構成部材の諸形状や組み合わせ等は一例であって、本発明の主旨から逸脱しない範囲において設計要求等に基づき種々変更可能である。 The preferred embodiment of the present invention has been described above with reference to the drawings, but the present invention is not limited to the above embodiment. Various shapes, combinations, and the like of the constituent members shown in the above-described embodiments are examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.
　例えば、上記実施形態では、位置決め溝５１と突起拡張部５３とが重なることを避ける構成について説明したが、本発明は、位置決め溝５１と突起拡張部５３との少なくとも一部が重なった状態で位置決め突起５２を挟み込む構成も採用することができる。 For example, in the above-described embodiment, the configuration in which the positioning groove 51 and the protrusion extension portion 53 are prevented from overlapping each other has been described. However, in the present invention, positioning is performed in a state where at least a part of the positioning groove 51 and the protrusion extension portion 53 overlap. A configuration in which the protrusion 52 is sandwiched can also be employed.
　また、例えば、上記実施形態では、転動体としてボールを採用したが、本発明は、ローラー等の他の転動体を採用することができる。 For example, in the above-described embodiment, the ball is used as the rolling element, but the present invention can employ other rolling elements such as a roller.
　また、例えば、上記実施形態では、本発明をリニアガイドに適用して説明したが、本発明は、ボールスプライン等の他の運動案内装置にも適用することができる。 In addition, for example, in the above-described embodiment, the present invention is applied to a linear guide, but the present invention can also be applied to other motion guide devices such as a ball spline.
　また、例えば、上記各実施形態の構成の置換、組み合わせは適宜可能である。 In addition, for example, substitution and combination of the configurations of the above-described embodiments are possible as appropriate.
　上記した運動案内装置は、２つの部品を組み合わせて成る蓋体の移動体本体に対する位置決め精度を向上させ、長期間の高速使用にも耐えることができる。 The above-described motion guide device improves the positioning accuracy of the cover body, which is a combination of two parts, with respect to the moving body, and can withstand long-term high-speed use.
　１　　リニアガイド（運動案内装置）
　１０　　軌道レール（軌道体）
　２０　　スライダブロック（移動体）
　２１　　ブロック本体（移動体本体）
　２１ｓ　　端面
　２２　　エンドプレート（蓋体）
　２４　　内側面
　２５　　負荷転動体転走溝
　３０　　ボール（転動体）
　４０　　インナープレート（転動体方向転換内周案内部）
　４１　　アウタープレート（転動体方向転換外周案内部）
　４２　　角部
　５１，５１ａ，５１ｂ　　位置決め溝
　５２，５２ａ，５２ｂ　　位置決め突起
　５３，５３ａ，５３ｂ　　突起拡張部
　５４，５４ａ，５４ｂ　　逃がし溝
　５５，５６ａ，５６ｂ　　係合突起
　Ｌ　　無限循環路
　Ｌ１　　負荷転動体転走溝
　Ｌ３　　転動体方向転換路 1 Linear guide (motion guide device)
10 Track rail (track body)
20 Slider block (moving body)
21 Block body (moving body body)
21s end face 22 end plate (lid)
24 Inner side surface 25 Load rolling element rolling groove 30 Ball (rolling element)
40 Inner plate (Rolling body direction change inner circumference guide)
41 Outer plate (Rolling body direction changing outer periphery guide)
42 corner 51, 51a, 51b positioning groove 52, 52a, 52b positioning protrusion 53, 53a, 53b protrusion extension 54, 54a, 54b relief groove 55, 56a, 56b engaging protrusion L endless circuit L1 load rolling element rolling Groove L3 Rolling body direction change path

Claims (8)

  1. 　軌道体と、
    　前記軌道体に沿って移動可能な移動体と、
    　前記軌道体と前記移動体とによって形成された無限循環路を転走する複数の転動体と、
    　を有する運動案内装置であって、
    　前記移動体は、移動体本体と、前記移動体本体の端面に取り付けられて前記無限循環路の転動体方向転換路を形成する蓋体と、を有し、
    　前記蓋体は、転動体方向転換内周案内部及び転動体方向転換外周案内部が組み合わされて成り、
    　前記移動体本体の前記端面に設けられ、前記蓋体を位置決めするための位置決め溝と、
    　前記転動体方向転換内周案内部及び転動体方向転換外周案内部のうちの一方に設けられ、前記位置決め溝に挿入可能な複数の位置決め突起と、
    　前記転動体方向転換内周案内部及び転動体方向転換外周案内部のうちの他方に設けられ、前記複数の位置決め突起の間隔を拡張させるように前記一方に係合し、前記複数の位置決め突起を前記位置決め溝に押し当てる突起拡張部と、を有する運動案内装置。     A track body,
    A movable body movable along the track,
    A plurality of rolling elements that roll on an infinite circuit formed by the track and the moving body;
    A motion guide device comprising:
    The moving body has a moving body main body, and a lid that is attached to an end surface of the moving body main body and forms a rolling element direction changing path of the infinite circulation path,
    The lid body is formed by combining a rolling element direction change inner periphery guide part and a rolling element direction change outer periphery guide part,
    A positioning groove provided on the end surface of the movable body for positioning the lid;
    A plurality of positioning protrusions that are provided on one of the rolling element direction changing inner periphery guide part and the rolling element direction changing outer periphery guide part, and are insertable into the positioning groove;
    Provided on the other of the rolling element direction changing inner periphery guide part and the rolling element direction changing outer periphery guide part, and engaged with the one to extend the interval between the plurality of positioning protrusions, and the plurality of positioning protrusions A motion guide device having a protrusion extension portion pressed against the positioning groove.
  2. 　前記突起拡張部は、前記位置決め溝に対し、前記複数の位置決め突起の挿入方向において前記端面よりも手前に設けられている請求項１に記載の運動案内装置。 The motion guide device according to claim 1, wherein the protrusion extension portion is provided in front of the end face in the insertion direction of the plurality of positioning protrusions with respect to the positioning groove.
  3. 　前記複数の位置決め突起の周りに設けられ、前記端面に対して凹んだ逃がし溝を有する請求項１または２に記載の運動案内装置。 The motion guide device according to claim 1 or 2, further comprising an escape groove provided around the plurality of positioning protrusions and recessed with respect to the end face.
  4. 　前記突起拡張部は、前記複数の位置決め突起のそれぞれと係合する複数の係合孔を有する請求項１～３のいずれか一項に記載の運動案内装置。 The motion guide apparatus according to any one of claims 1 to 3, wherein the protrusion extension portion has a plurality of engagement holes that engage with the plurality of positioning protrusions.
  5. 　前記突起拡張部は、前記複数の位置決め突起の間に圧入される係合突起を有する請求項１～３のいずれか一項に記載の運動案内装置。 The motion guide device according to any one of claims 1 to 3, wherein the protrusion extension portion includes an engagement protrusion that is press-fitted between the plurality of positioning protrusions.
  6. 　前記転動体方向転換内周案内部は、門型に形成されており、
    　前記位置決め溝と、前記複数の位置決め突起と、前記突起拡張部とは、前記転動体方向転換内周案内部の角部に対応する位置に設けられている請求項１～５のいずれか一項に記載の運動案内装置。     The rolling element direction change inner circumferential guide portion is formed in a gate shape,
    6. The positioning groove, the plurality of positioning protrusions, and the protrusion extending portion are provided at positions corresponding to corner portions of the rolling element direction changing inner circumferential guide portion. The motion guide device according to 1.
  7. 　前記蓋体には、前記転動体方向転換路が隣り合って設けられており、
    　前記位置決め溝と、前記複数の位置決め突起と、前記突起拡張部とは、前記隣り合う前記転動体方向転換路の間に対応する位置に設けられている請求項１～５のいずれか一項に記載の運動案内装置。     The lid is provided with the rolling element direction changing path adjacent to each other,
    6. The positioning groove, the plurality of positioning protrusions, and the protrusion extending portion are provided at positions corresponding to the space between the adjacent rolling element direction change paths. The motion guide apparatus described.
  8. 　前記移動体本体には、前記無限循環路の一部を形成する負荷転動体転走溝が設けられており、
    　前記位置決め溝は、前記負荷転動体転走溝が形成された面と同一の面に設けられている請求項１～５、７のいずれか一項に記載の運動案内装置。     The moving body main body is provided with a load rolling element rolling groove that forms a part of the endless circuit,
    The motion guide device according to any one of claims 1 to 5, wherein the positioning groove is provided on the same surface as the surface on which the load rolling element rolling groove is formed.
PCT/JP2015/054461 2014-02-21 2015-02-18 Motion guidance device WO2015125830A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007292241A (en) * 2006-04-26 2007-11-08 Nsk Ltd Linear guide device
US20100209029A1 (en) * 2009-02-16 2010-08-19 Steffen Pfister Linear motion device comprising projection-free return passage
JP2012082879A (en) * 2010-10-08 2012-04-26 Thk Co Ltd Motion guide device
JP3176185U (en) * 2011-12-30 2012-06-14 國樂 曹 Columnar roller type linear sliding block

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08284953A (en) * 1995-04-10 1996-11-01 Thk Kk Rolling guide device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007292241A (en) * 2006-04-26 2007-11-08 Nsk Ltd Linear guide device
US20100209029A1 (en) * 2009-02-16 2010-08-19 Steffen Pfister Linear motion device comprising projection-free return passage
JP2012082879A (en) * 2010-10-08 2012-04-26 Thk Co Ltd Motion guide device
JP3176185U (en) * 2011-12-30 2012-06-14 國樂 曹 Columnar roller type linear sliding block

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