JP6236226B2 - Linear motion guide unit with holding plate - Google Patents

Description

  The present invention relates to, for example, a linear motion guide unit provided on a holding plate that holds a rolling element on a slider that can move relative to a track rail.

  Conventionally, a linear motion guide unit shown in FIG. 28 is known as a linear motion rolling guide unit. The linear motion guide unit includes a track rail 1P and a slider that moves relative to the track rail 1P via a roller 5P that is a rolling element. The sliders are fixed to both ends of the casing 3P and casing 3P. Has a cap. The roller 5P is held in the casing 3P by a holding plate 6P. The holding plate 6P is fixed by a bolt 7P passed through an insertion hole 9P formed in the casing 3P and a nut 8P screwed into the bolt 7P.

  Conventionally, a linear motion rolling guide unit in which a holding plate is fixed to an end cap with a fixing band is known. The linear motion rolling guide unit includes a holding plate and a fixing band for holding and guiding the cylindrical rollers. The holding plate holds the cylindrical rollers along the longitudinal raceway groove of the casing. The holding plate is engaged with the holding plate from the outside and supported by the casing in a pressed state, and locking claws provided at both ends of the holding plate are locked in locking holes formed in the end cap and fixed to the end cap ( For example, see Patent Document 1).

  In addition, a linear motion guide device is known that is large and can be easily manufactured, and that the long and thin holding portion and the escape passage constituting member are not bent and the inner peripheral guide portion constituting member is not opened. The linear motion guide device is made of resin parts separately, preventing deformation during molding of each part, making it easy to manufacture large motion guide devices and holding the rollers of rolling elements. The belt is aligned to prevent the roller from tilting with respect to the direction of travel (skew). The rolling element holding member and the escape passage constituting member are formed separately from the block main body and formed separately from each other to prevent deformation of each part during molding. The rolling element holding member is formed with positioning protrusions at both ends, and is fixed by being inserted into the positioning recesses of the inner peripheral guide portion constituting member (see, for example, Patent Document 2).

  In addition, a track guide bearing that holds a ball of a rolling element is known. The track guide bearing is provided with a protrusion on the cage for holding the ball, combined with a holding groove having an arc cross section formed between the ball rolling grooves of the slide base, and protruding portions at both axial ends of the cage. Is inserted and fixed in a fixing hole of the side plate to prevent the ball from falling off (see, for example, Patent Document 3).

Japanese Patent No. 2918429 Japanese Patent No. 4568453 Japanese Utility Model Publication No. 62-30581

  However, since the linear motion guide unit shown in FIG. 28 holds the holding plate 6P on the slider 2P, it is necessary to form an insertion hole 9P for inserting the bolt 7P in the casing 3P, which increases the processing cost. In addition, it is difficult to form the insertion hole 9P in the casing 3P with the small linear guide unit. In the linear motion rolling guide unit of the above (Patent Document 1), since the fixing band for fixing the holding plate is substantially U-shaped, it is necessary to prepare a fixing band suitable for each when the length of the slider is different. was there. In addition, the linear motion guide device of the above (Patent Document 2) has a complicated shape because a plurality of holding members are provided to hold the holding band. Also, the ones disclosed in Patent Document 2 and Patent Document 3 are provided with protrusions at both ends of the holding member and fixing holes in the end cap, and it is necessary to prepare a dedicated product when the sliders have different lengths. was there.

  SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and a holding plate for holding a roller of a rolling element on a slider is composed of a pair of flat plate portions obtained by bending a thin plate into a V-shaped cross section. Since both ends of the are fitted and held in the fitting grooves of the end cap, the holding plate itself can be configured to be lightweight, and can be easily and easily held by the end cap, contributing to the downsizing of the slider. It is to provide a linear motion guide unit having a holding plate that can be used.

The present invention, first raceway surface pixel respectively formed track rail vertically along the longitudinal direction of both sides, the second track surface facing the first raceway surface saddled the track rail And a slider that moves relative to each other via a roller that is a rolling element that rolls on a raceway formed by the first raceway surface and the second raceway surface, and the slider includes the second raceway surface and the second raceway surface. A casing having a return path extending in parallel with the second track surface, end caps fixed to both ends in the longitudinal direction of the casing, the track path, the return path, and the track path and the return path are communicated with each other. In the linear motion guide unit comprising: the roller that rolls along a circulation path formed of a direction changing path formed in the end cap; and a holding plate that holds the roller in the casing.
The holding plate is composed of a pair of flat plate portions obtained by bending a thin plate into a V-shaped cross section along the longitudinal direction. The pair of flat plate portions is formed longer than the length of the casing and both end portions are formed on the end cap. has been with supported fixed to the fitting groove, holds the one end surface of the trackway each rolling run to that before Symbol roller and the draft and the rollers of the top and bottom to the second track surface, The holding plate has a pointed V-shaped section fitted into a V-shaped engaging groove formed along the longitudinal direction between the upper and lower second raceway surfaces of the casing. The upper end of the holding plate is fitted and disposed in a V-shaped cross section of the fitting groove formed in the end cap, and extends from the pointed end to the track rail side. The flat plate portion and the upper track in the upper track Guided the end face of the roller toward the road rail side, and headed toward the track rail side in the lower track with the lower flat plate portion extending from the pointed end to the track rail side A claw portion configured to guide the end surface of the roller and to support a part of the rolling surface of the roller and to hold the roller is formed on an edge portion of the flat plate portion, and a tip of the claw portion. part is spans the outer peripheral surface of the roller to form a recess to release the shoulder of the roller, the linear motion guide unit, wherein that you prevented from falling off from the second track surface of the roller by the claw portion About.

The front SL end cap and the end cap body, is composed of a spacer fitted in a recess formed in the end cap body for forming the direction changing passage, the cross-section V-shaped groove of the fitting groove the one in which the end cap body said are spacers and the thus formed.

Also, the linear motion guide unit, the holding plate, in order to abut the tip before Symbol locking grooves of the casing, bent V-shaped cross section formed by said pair of plate portions A fixing member formed longer than the length of the casing is disposed in the V-groove, and the fixing member is fitted and fixed in fixing holes formed at both ends of the end cap . The end cap is formed at a triangular section between the roller scoop portions of the two direction change paths of the end cap .

The front Symbol fixing member is integrally fixed to the structure on said pair of flat plate portions of the holding plate. Further, the fixing member, the longitudinal direction straight, whereas curved warped on the side, or is formed in a barrel shape is larger cross-sectional area of the central portion with respect to both ends, the cross section of the fixing member shape is one that has a circular, solid rod shaped member or a hollow pipe-like member in a polygonal, or V-shaped.

  As described above, this linear motion guide unit is configured such that the holding plate itself is lightweight and both end portions thereof are locked in the fitting grooves of the end cap. There is no need to process a through hole for inserting a bolt for fixing the casing, the casing processing cost can be reduced, and the length of the holding plate can be selected according to the length of the casing constituting the slider. In addition, when the holding plate is long, the holding plate can be reliably supported by the casing by using a fixing member that reinforces and supports the holding plate, and when the casing is short, the fixing member It is possible to support and fix to the end cap with only the holding plate without using the. Further, when a fixing member is used for supporting the holding plate to the casing, the fixing member can also serve as a reinforcing member, and can be configured firmly. In addition, when the roller, which is a rolling element, skews, a pressing force is applied to the guide surface of the holding plate. However, the structure combining the holding plate and the fixing member is difficult to deform, and even when the slider length is long, the skew is restricted. It can be configured to have high power. Although the holding plate has a compact cross-sectional shape, it has a V-shaped cross section, so it can have high strength, and the holding plate can be supported on the end cap by simply inserting it into the fitting groove. Can be facilitated and the number of assembly steps can be reduced. In addition, when the holding plate according to the present invention is incorporated in the slider, the guide surface of the holding plate can be formed larger than in the conventional bolt fixing structure of the holding plate, so that a larger roller can be used and linear motion rolling guidance is possible. The rated load of the unit can be increased. In addition, since the holding plate can be made of a thin plate, the clearance groove of the track rail can be made shallow, and the track rail can be configured to be difficult to deform even when subjected to an external load in the bending direction. In addition, when the holding plate and the fixing member have the same cross-sectional shape over the entire length, the length can be adjusted by cutting, and the manufacturing cost can be reduced with the simple shape of the holding plate.

It is a perspective view which shows the partial cross section which shows one Example of the linear motion guide unit provided with the holding plate by this invention. It is sectional drawing in line AA of the linear motion guide unit of FIG. It is an exploded view which shows a part of casing, an end cap, and a lubrication supply plate in the linear guide unit of FIG. FIG. 4 is an exploded view showing a part of a holding plate and an end cap of FIG. 3 in the region D in the linear motion guide unit of FIG. 1. FIG. 5 is an assembly diagram illustrating a state in which the holding plate of FIG. 4 is supported by an end cap. It is a perspective view which shows the partial cross section which shows another Example of the linear motion guide unit provided with the holding plate by this invention. It is sectional drawing in line EE of the linear motion guide unit of FIG. FIG. 7 is an exploded view showing a part of a casing, an end cap, and a lubrication supply plate in the linear motion guide unit of FIG. 6. It is an expanded sectional view which expands the B area | region in the linear motion guide unit of FIG. 2, and shows the arrangement | positioning state of a holding plate. The holding plate incorporated in the linear motion guide unit of FIG. 1 or FIG. 6 is shown, (A) is a front view of the holding plate, and (B) is a plan view of the holding plate. It is the expanded sectional view which expanded G area | region of FIG. It is an expanded sectional view which expands F area | region in the linear guide unit of FIG. 7, and shows an example of the arrangement | positioning state of a holding plate. FIG. 8 is an enlarged cross-sectional view showing another example of the arrangement state of the holding plate by enlarging an area corresponding to the F area in the linear motion guide unit of FIG. 7. It is an expanded sectional view which expands the area | region corresponding to F area | region in the linear guide unit of FIG. 7, and shows another example of the arrangement | positioning state of a holding plate. It is an expanded sectional view which expands the area | region corresponding to F area | region in the linear guide unit of FIG. 7, and shows the other example of the arrangement | positioning state of a holding plate. 1 shows an example of a fixing member that supports a holding plate incorporated in a linear motion guide unit according to the present invention, (A) is a front view of the fixing member, (B) is a plan view of the fixing member, and (C) is a fixing member. It is a side view of a member. The other example of the fixing member which supports the holding | maintenance board integrated in the linear guide unit by this invention is shown, (A) is a front view of a fixing member, (B) is a top view of a fixing member. It is sectional drawing in line CC of the slider which comprises the linear motion guide unit of FIG. It is an enlarged view which shows the H area | region of the slider of FIG. It is sectional drawing which shows the position of the circulation path of the rolling element in the linear guide unit by this invention. It is a front view which shows the state which removed the end seal from the linear motion guide unit of FIG. It is a front view which shows the end cap in the slider of FIG. 1 or FIG. It is a bottom view which shows the end cap of FIG. It is a rear view which shows the end cap of FIG. It is a rear view which shows the end cap main body which removed the spacer in the end cap of FIG. FIG. 25 is a cross-sectional view illustrating a region of line II in the end cap of FIG. 24. It is sectional drawing which shows the area | region of the line JJ in the end cap of FIG. It is sectional drawing which shows the conventional linear motion guide unit.

  Hereinafter, an embodiment of a linear motion guide unit according to the present invention will be described with reference to the drawings. The linear motion guide unit according to the present invention is generally a four-row roller type that includes a slider 2 that relatively moves on a track rail via a rolling element, and has a holding structure for a roller 5 that is a rolling element. The linear motion guide unit shown in FIG. 1 to FIG. 5 is an embodiment applied only when the length of the slider 2 and the holding plate 6 is short, which has only the holding plate 6. Further, the linear motion guide unit shown in FIGS. 6 to 8 has a structure including the holding plate 6 and the fixing member 31, and is applied when the length of the slider 2 and the holding plate 6 is long. This is an example. In this linear motion guide unit, the holding plate 6 is composed of a pair of flat plate portions 7 formed by bending a thin plate to have a substantially V-shaped cross section. In this embodiment of the linear motion guide unit, the holding plate 6 uses the roller 5 as a rolling element, but in some cases, the holding plate 6 can also be applied when the rolling element is a ball. In this embodiment, for example, the width of the track rail 1 is about 45 mm, and the roller 5 is used as a rolling element, and the separator 35 is disposed between the rollers 5. The shape of the slider 2 of the embodiment is a flange type, and the fixing screw hole 48 for fixing to the other side can be mounted downward. Further, end caps 4 are fixed to both end surfaces 14 of the casing 3 constituting the slider 2, and an oil storage plate 38 containing a lubricant is fitted and disposed in the recess 54 at the end of the end cap 4. The protruding portion 43 of the oil storage plate 38 is exposed from the opening 41 formed in the direction changing path 30 of the end cap 4, and the roller 5 rolling on the direction changing path 30 comes into contact with the protruding portion 43. The roller 5 is configured to supply oil. An oil groove 47 for supplying the lubricant from the grease nipple 53 to the roller 5 is formed on the end face of the end cap 4 on the casing 3 side. The oil storage plate 38 is formed of a sintered resin having a porous structure in which the synthetic resin fine particles are pressed and solidified to form a porous structure in which the synthetic resin fine particles communicate with each other. Is impregnated. As long as the oil storage plate 38 can hold the lubricant, the foamed and communicated porous structure polyurethane, polyethylene and lubricant are mixed and heat-molded, and the porous structure in which the fibers are partially heat-bonded It can also be made of any kind of fiber. An inner surface seal 37 is provided in the groove on the lower surface of the slider 2.

  As shown mainly in FIGS. 1 to 5 and FIGS. 18 to 20, the rolling element is constituted by a small and compact short roller type composed of a roller 5. In this linear motion guide unit, the length of the casing 3 is as short as about 50% of the width dimension of the casing 3, for example. This linear motion guide unit straddles the track rail 1 and the track rail 1 each having a pair of track surfaces 11 (first track surfaces) formed along escape grooves 33 extending on both side surfaces 13 in the longitudinal direction. The slider 2 is configured to be slidable relative to each other via a roller 5 that is a rolling element. The slider 2 has a track surface 12 (second track surface) formed opposite to the track surface 11 of the track rail 1 and a load path track 20 formed between the track surface 11 and the track surface 12. A pair of arc-shaped pairs that are respectively attached to both end faces 14 of the casing 3 and the casing 3 that are formed with a pair of unloaded return paths 15 extending in parallel along the path and that communicate the track path 20 and the return path 15 respectively. A plurality of rolling elements that roll on a circulation path 40 constituted by an end cap 4 formed with a direction change path 30 of a no-load path and a track path 20, a return path 15, and a pair of direction change paths 30, respectively. A roller 5 is provided. The return path 15 is formed by a through hole of a long sleeve 46 inserted into a pair of fitting insertion holes 45 formed in the sleeve portion of the casing 3. As shown in FIGS. 3 to 5, the end cap 4 is provided with a connection convex portion 39 that forms an inlet / outlet portion of the return path 15 communicating with the direction changing path 30, and the connection convex portion 39 of the end cap 4 is connected to the casing. The direction change path 30 and the return path 15 can be smoothly communicated with each other when the fitting insertion hole 45 formed in 3 is fixed.

  As shown in FIG. 2, the linear motion guide unit includes a casing 3 having a main body 50 positioned on the track rail 1 and a track rail 1 extending from both sides in the width direction of the main body 50 while straddling the track rail 1. It is composed of both sleeve portions 51 extending along the side surface 13. On both sleeve portions 51 of the slider 2, the raceways 20 are formed in a total of four rows, and a return path 15 and a direction change path 30 are communicated with each of the raceways 20 to form a circulation path 40. The roller 5 that rolls on one of the pair of circulation paths 40 of the sleeve portion 51 circulates from the lower track 20 that receives the downward load of the slider 2 to the return path 15 on the upper side of the casing 3. In addition, the roller 5 rolling on the other circulation path 40 circulates from the upper raceway 20 receiving the upward load of the slider 2 to the lower return path 15 of the casing 3. The linear motion guide unit includes an end seal 36 provided on the outer end surface of the end cap 4 and provided with a lip portion that seals a gap between the track rail 1 and the slider 2, and the casing 3 and the end cap 4. A lower surface seal is disposed on the lower surface, and the slider 2 is formed in a seal structure. The slider 2 fixes the end cap 4 and the end seal 36 to the casing 3, specifically, a fixing screw is passed through the mounting hole 44 of the end cap 4 and the end seal 36, and the mounting screw hole 52 of the casing 3. It is configured integrally by tightening (FIG. 3). In the track rail 1, mounting holes 49 through which bolts are inserted are formed in the longitudinal direction so as to be attached to other members such as a base and a bed. Further, a mounting screw hole 48 is formed in the casing 3 for fixing members such as other devices, workpieces, and attachment bodies to the slider 2. The end cap 4 is fitted into the end cap body 18 that forms the outer periphery of the direction change path 30 and the recess 42 formed in the end cap body 18 to form the direction change path 30, and the wall surface of the direction change path 30 is formed. The spacer 19 is formed. As shown in FIG. 20, the spacer 19 has a large size spacer 19L that cooperates with the concave wall surface of the end cap body 18 to form a deeper direction change path 30L, and the concave wall surface of the end cap body 18 and the spacer 19L. The spacer 19S has a small size that cooperates with the wall surface of the surface to form the shallow direction change path 30S.

Further, the direction change path 30 formed in the end cap 4 is formed in a crossed state on both sleeves of the end cap 4 so as to cross each other, and as shown in FIG. 30L and a short circular inner direction change path 30S cross each other, and one of the pair of circulation paths 40 is the direction change path 30L, the track path 20, the return path 15, and the direction. The other side is composed of the direction change path 30S, the track path 20, the return path 15, and the direction change path 30L. The roller 5 that rolls on the raceway 20 includes a rolling surface 21 that rolls on the circulation path 40 and end surfaces 22 at both ends thereof. One end surface 22 of the roller 5 is guided and held by a guide surface 16 of a holding plate 6 to be described later, and the other end surface 22 is guided and held by a guide surface 9G extending at right angles to the raceway surface 12 of the casing 3. Yes. Thereby, when the slider 2 is removed from the track rail 1, the roller 5 does not fall off the slider 2. The linear motion guide unit is grease nipple 53 is attached to the side surface of the end cap 4, it communicates with the oil supply hole of the end cap 4, as shown in FIGS. 1 and 3, the end cap 4 the casing the third end surface 14 opposite the recess 54 is lubricant reservoir 38 of the lubricating member formed of a porous molded body such as a sintered resin member impregnated with lubricant is provided, the direction of the protruding portion 43 of the lubricant reservoir 38 It is exposed at the opening 41 of the conversion path 30. Therefore, in this linear motion guide unit, the lubricant is supplied to the roller 5 that rolls on the direction changing path 30, so that the lubricated roller 5 rolls on the track path 20 so that the lubricant is applied to the track path 20. It is configured to be refueled, and has a structure that can hold a large amount of lubricant even in a small and compact short size, and maintenance of the lubricant is achieved.

The linear motion guide unit according to the present invention is particularly characterized by the shape of the holding plate 6 and its holding structure. In particular, the holding plate 6 includes a pair of flat plate portions 7 formed by bending a thin plate formed of a metal material or a carbon fiber resin into a V-shaped cross section along the longitudinal direction. The pair of flat plate portions 7 are formed longer than the length of the casing 3, and both end portions 17 are inserted into the fitting grooves 10 formed in the end cap 4 to be supported and fixed, and are composed of upper and lower raceway surfaces 12 of the casing 3. It is characterized in that the end surface 22 of each roller 5 that rolls on the raceway surface 12 is guided and held on the raceway surface 12. The holding plate 6 that holds the roller 5 is thin and extends in the longitudinal direction of the casing 3. That is, as shown in FIG. 10, the cross-sectional shape of the holding plate 6 is composed of a pair of substantially V-shaped flat plate portions 7 bent at 90 °. The holding plate 6 is disposed by fitting a pointed portion 8 having a V-shaped cross section into a locking groove 9 having a V-shaped cross section formed along the longitudinal direction between upper and lower track rows of the casing 3. , Both end portions 17 of the pointed end portion 8 are fitted and disposed in a V-shaped cross section of the fitting groove 10 formed in the end cap 4. A pair of flat plate portions 7 of the holding plate 6 is disposed in the fitting groove 10 having a V-shaped cross section formed by the end cap body 18 and the spacer 19 of the end cap 4.

Further, the holding plate 6 guides the end surface 22 of the roller 5 facing the track rail 1 side in the upper track row by the upper flat plate portion 7 extending from the tip portion 8 toward the track rail 1 side. The lower flat plate portion 7 extending toward the rail 1 is configured to guide the end face 22 of the roller 5 toward the track rail 1 in the lower track row. Further, the pair of flat plate portions 7 constituting the holding plate 6 are respectively formed on the guide surfaces 16 that guide the end surfaces 22 of the rollers 5. Further, in this linear motion guide unit, a claw portion 24 that supports a part of the rolling surface 21 of the roller 5 and holds the roller 5 is provided on the outer edge 23 of the guide surface 16 of each flat plate portion 7. As shown in FIG. 11, the claw portion 24 has a distal end portion 25 that spans the rolling surface 21 of the outer peripheral surface of the roller 5 and is formed with a recess 26 for allowing the shoulder portion of the roller 5 to escape. An elastic force is given to 24 to prevent the roller 5 from falling off the raceway surface 12.

  As shown in FIG. 10, the holding plate 6 is formed with two guide surfaces 16 for guiding the end surface 22 of the roller 5, and the holding plate 6 has a substantially V-shaped apex portion, that is, a pointed portion 8 of the casing 3. It arrange | positions in the state contact | abutted to the latching groove | channel 9 which is a ditch | groove of the sleeve part 51 inner wall. The locking groove 9 is formed between the two raceway surfaces 12 of the sleeve portion 51 of the casing 3, and a claw portion 24 that is a guide edge portion is formed on the edge portion of the guide surface 16 of the holding plate 6. ing. The claw portion 24 has a function of supporting a part of the rolling surface 21, which is the outer peripheral surface of the roller 5, so that the roller 5 does not fall off the casing 3. A concave portion 26 is formed at the base of the claw portion 24 on the guide surface side, and the concave portion 26 is configured to escape the shoulder portion of the roller 5. The recess 26 is formed in the shape of a relief groove, the cross-sectional shape thereof is formed in a substantially wedge shape, and the claw portion 24 is given an elastic force. In this linear motion guide unit, the overall length of the holding plate 6 is slightly longer than the length of the casing 3, and the overall length of the holding plate 6 is 102 mm when the width of the track rail 1 is about 45 mm. Can be formed to 99 mm.

  Next, another embodiment of the linear motion guiding unit according to the present invention will be described with reference to FIGS. In the holding plate 6 of this embodiment, the pair of flat plate portions 7 are brought into contact with the locking grooves 9 formed in the casing 3, so that the V groove 27 formed by the pair of flat plate portions 7 has a length of the casing 3. A long fixing member 31 is disposed. The fixing member 31 is made of a metal material or carbon fiber resin, and both end portions 32 of the fixing member 31 are convex portions between the direction change paths 30 of the end cap 4. It is fitted and fixed in a fixing hole 29 formed in 28P. Specifically, the fixing hole 29 formed in the end cap 4 is formed in a convex portion 28 </ b> P having a triangular section between the roller scoop portions 28 of the two direction change paths 30 of the end cap 4. The fixing member 31 can also be fixed to the pair of flat plate portions 7 of the holding plate 6 with an adhesive or the like in an integrated structure. Further, as shown in FIG. 8, the fixing member 31 has a straight shape in the longitudinal direction and a curved fixing member 34 warped on one side as shown in FIG. The cross-sectional area of the fixing member is formed in a circular, polygonal or V-shaped solid rod-shaped member or a hollow pipe-shaped fixing member 34B.

In this linear motion guide unit, the fixing member 31 that presses the holding plate 6 against the casing 3 is formed to be longer than the entire length of the holding plate 6, and in the vicinity of the roller scoop portion 28 of the end cap 4, Both end portions 32 of the fixing member 31 are inserted into the fixing holes 29 formed in the convex portion 28P having a substantially triangular cross section protruding to the escape groove 33 side, whereby the end cap fixed to the both end surfaces 14 of the casing 3 4, both end portions 32 of the fixing member 31 are fitted and fixed. Here, the hole shape of the fixing hole 29 is not limited as long as the end portions 32 of the holding plate 6 and the fixing member 31 are fixed, and the fixing hole 29 is fitted to the shape of the end portion 32 of the fixing member 31. It is preferable that it is fixed. The holding plate 6 is pushed to the casing 3 side by the fixing member 31, and is fixed in close contact with the concave locking groove 9 formed between the upper and lower raceway surfaces 12 of the casing 3. This linear motion guide unit acts so that the end surface 22 of the roller 5 presses the guide surface 16 of the holding plate 6 when the roller 5 rolling on the track 20 is skewed, thereby suppressing the skew of the roller 5. To do. The fixing member 31 has a structure that is supported from the back side of the V-shaped holding plate 6, and can prevent the holding plate 6 from being lifted from the casing 3.

  FIG. 12 shows a fixing member 31 having a circular cross section, and the holding plate 6 is disposed in the casing 3 with the fixing member 31 pressing the holding plate 6 against the locking groove 9 of the casing 3. Has been. Further, FIG. 13 shows a fixing member 31A formed in a circular pipe in cross section. Similarly to FIG. 12, the fixing member 31A presses the holding plate 6 against the locking groove 9 of the casing 3, A holding plate 6 is disposed in the casing 3. 14 shows a fixing member 31B having a quadrangular cross section, and FIG. 15 shows a fixing member 31C having a triangular cross section. The functions of the fixing member 31B and the fixing member 31C are shown in FIG. 12 and the fixing member 31A in FIG. 12 have the same functions.

  Alternatively, in this linear motion guide unit, as shown in FIG. 16, the fixing member 34 may be formed in a curved shape while warping on one side. The curved fixing member 34 is held by the curved fixing member 34 if the convex side is brought into contact with the holding plate 6 and both end portions 32 of the fixing member 34 are respectively inserted into the fixing holes 29 of the end cap 4 and fixed. The action of pressing the casing 6 against the casing 3 is enhanced at the longitudinal center position of the plate 6, and the floating state of the holding plate 6 from the casing 3 can be prevented. The cross-sectional shape of the curved fixing member 34 may be a polygon other than a circle or a hollow pipe structure, and of course can exhibit the same action. Or as shown in FIG. 17, the fixing member 34B can also be formed in the barrel shape which made the center position of the longitudinal direction thick. The barrel-shaped fixing member 34 </ b> B can be expected to have the same effect as the action of the curved fixing member 34 pressing the holding plate 6 against the casing 3.

  The linear motion guide unit according to the present invention is incorporated in sliding parts of various machines such as machine tools, various assembling apparatuses, transport machines, various robots, semiconductor manufacturing apparatuses, precision machines, measuring / inspecting apparatuses, medical equipment, and micromachines. It can be used to support the rolling element with a simple holding plate.

1 Track rail 2 Slider 3 Casing 4 End cap 5 Roller (rolling element)
6 holding plate 7 flat plate portion 8 pointed end portion 9 locking groove 10 fitting groove 11 raceway surface (first raceway surface)
12 Track surface (second track surface)
13 Side surface 14 End surface 15 Return path 16 Guide surface 17 End portion 18 End cap body 19 Spacer 20 Track path 21 Rolling surface 22 End surface 23 Edge portion 24 Claw portion 25 Tip portion 26 Recessed portion 27 V groove 28 Roller scoop portion 28P Convex portion 29 Fixing hole 30 Direction change path 31, 31A, 31B, 31C, 34, 34B Fixing member 32 End 33 Relief groove 40 Circulation path

Claims (5)

The first raceway surface pixel respectively formed track rail vertically along the longitudinal direction of both sides, the second track surface facing the first raceway surface saddled the track rail are respectively formed And a slider that moves relative to each other via a roller that is a rolling element that rolls on a raceway formed by the first raceway surface and the second raceway surface, the slider comprising the second raceway surface and the second raceway. A casing having a return path extending parallel to the surface, end caps fixed to both ends in the longitudinal direction of the casing, the track path, the return path, and the end cap communicating the track path and the return path. In the linear motion guide unit comprising the roller that rolls on the circulation path that is formed of the direction change path, and the holding plate that holds the roller in the casing,
The holding plate is composed of a pair of flat plate portions obtained by bending a thin plate into a V-shaped cross section along the longitudinal direction. The pair of flat plate portions is formed longer than the length of the casing and both end portions are formed on the end cap. has been with supported fixed to the fitting groove, holds the one end surface of the trackway each rolling run to that before Symbol roller and the draft and the rollers of the top and bottom to the second track surface, The holding plate has a pointed V-shaped section fitted into a V-shaped engaging groove formed along the longitudinal direction between the upper and lower second raceway surfaces of the casing. The upper end of the holding plate is fitted and disposed in a V-shaped cross section of the fitting groove formed in the end cap, and extends from the pointed end to the track rail side. The flat plate portion and the upper track in the upper track Guided the end face of the roller toward the road rail side, and headed toward the track rail side in the lower track with the lower flat plate portion extending from the pointed end toward the track rail side A claw portion configured to guide the end surface of the roller and to support a part of the rolling surface of the roller and to hold the roller is formed on an edge portion of the flat plate portion, and a tip of the claw portion. part is spans the outer peripheral surface of the roller to form a recess to release the shoulder of the roller, the linear motion guide unit, wherein that you prevented from falling off from the second track surface of the roller by the claw portion . The end cap includes an end cap body and a spacer fitted in a recess formed in the end cap body to form the direction changing path, and the cross-sectional V-shaped groove of the fitting groove is the end cap. linear motion guide unit according to claim 1, characterized in that it is thus formed on said spacer body. The said retaining plate, the order to the pointed end abuts prior Symbol locking groove of said casing, longer than the length of the casing in the V groove bent in a V-shape formed by said pair of plate portions The formed fixing member is disposed, and both ends of the fixing member are fitted and fixed in fixing holes formed in the end cap, and the fixing holes are formed in the two direction changing portions of the end cap. 3. The linear motion guide unit according to claim 1 , wherein the linear motion guide unit is formed in a triangular section between each roller scoop portion of the path .   The linear motion guide unit according to claim 3, wherein the fixing member is fixed to the pair of flat plate portions of the holding plate in an integral structure. The fixing member, the longitudinal direction straight, whereas curved warped on the side, or is formed in a barrel shape is larger cross-sectional area of the central portion with respect to both ends, the cross-sectional shape of the fixing member The linear motion guide unit according to claim 3 or 4, wherein the linear motion guide unit is formed into a round, polygonal , or V-shaped solid rod-like member or a hollow pipe-like member.

Images