JP2007092898A - Rolling body accommodation belt for linear motion guide device and linear motion guide device - Google Patents

Abstract

An object of the present invention is to make it easy to incorporate a ball into a rolling element housing belt, and to prevent a connecting arm portion of the rolling element housing belt from rubbing against a side wall surface of a guide groove.
There are provided a plurality of spacer portions 51 and connecting arm portions 52 that connect the spacer portions 51 to each other and project outward from an end surface of the spacer portions 51, and are defined by these. The balls 46 are accommodated in the moving body accommodating portion 55 and aligned in the arrangement direction in the endless circulation path 28, and the connecting arm portion 52 is guided along a guide groove formed inside the endless circulation path 28. In the linear guide 10 including the moving body accommodating belt 50, the rolling element accommodating portion 55 allows the accommodated balls 46 to drop only in the outer circumferential direction of the endless circulation path 28, and defines the rolling element accommodating portion 55. The two spacer portions 51 have contact surfaces (slope portions 51 a) that contact the balls 46 so that the spacer portions 51 cannot move in the outer circumferential direction of the endless circulation path 28.
[Selection] Figure 3

Description

  The present invention relates to a rolling element accommodation belt for a linear motion guide device and a linear motion guide device including the rolling element accommodation belt.

  This type of linear motion guide device includes a guide rail having a rolling element guide surface, and a slider disposed so as to be movable relative to the guide rail. The slider has a load rolling element guide surface that faces the rolling element guide surface of the guide rail and forms a rolling element track with the rolling element guide surface. Furthermore, the slider has a pair of direction change paths respectively connected to both ends of the rolling element raceway, and a rolling element return path connected to the pair of direction change paths. The rolling element raceway, the pair of direction changing paths, and the rolling element return path constitute an infinite circulation path, and a plurality of rolling elements circulate while rolling in the infinite circulation path. A guide groove is formed inside the endless circulation path along the endless circulation path.

  Furthermore, a rolling element accommodation belt is provided in the infinite circulation path. The rolling element housing belt interconnects the plurality of spacer portions interposed between the adjacent rolling elements in the endless circulation path, and the spacer portions, and projects outward from the end surface of the spacer portion. And a connecting arm portion guided by the guide groove. Then, a rolling element housing part is defined by the spacer part and the connecting arm part, and the rolling elements are individually accommodated in the rolling element housing part at a predetermined interval and aligned in the arrangement direction in the endless circulation path. (For example, see Patent Documents 1 to 4).

Here, in patent document 1, in order to hold a rolling element (ball) from a rolling element accommodation belt so that it cannot fall off, a rolling element accommodation belt provided with a size of an opening of the rolling element accommodation portion smaller than that of the rolling element is provided. A linear motion guide device is disclosed.
Further, in Patent Document 2, a rolling element (ball) is used as a core, and after forming a rolling element accommodation belt by injection molding, a special treatment such as oiling or water absorption is performed between the rolling element and the rolling element accommodation portion. A linear motion guide device including a rolling element housing belt in which an escape portion is formed is disclosed.

Patent Document 3 discloses a linear motion guide device that includes a rolling element accommodation belt provided with a rolling element accommodation portion that accommodates a rolling element without being held.
Further, Patent Document 4 discloses a linear motion guide including a rolling element housing belt that regulates the thickness of a predetermined range of the spacer portion so that the spacer portion can move toward the inner and outer peripheral sides of the infinite circulation path. An apparatus is disclosed.
Japanese Patent No. 2607993 Japanese Patent No. 3447849 Japanese Patent No. 3299450 JP 2002-130272 A

However, in the technique described in Patent Document 1, since the size of the opening of the rolling element housing portion is smaller than that of the rolling element, when the rolling element is incorporated into the rolling element housing portion, the alignment between the rolling element and the rolling element housing portion is performed. It is necessary to press the rolling element against the rolling element housing part with an appropriate pressing force after accurately performing the above. Therefore, the assembling work is troublesome and automation is difficult.
Moreover, in the technique described in Patent Document 2, it is necessary to align rolling elements in a mold during injection molding, and a special process is required after injection molding, which is easy to manufacture. Absent.

On the other hand, in the technique described in Patent Document 3, the rolling element housing portion is configured to be detachably accommodated without holding the rolling body, so that the assembly work of the rolling body to the rolling element housing portion is easy.
However, as described above, in this type of linear motion guide device, the connecting arm portion of the rolling element housing belt is guided by the guide groove provided along the infinite circulation path. Therefore, when the rolling element accommodation belt described in Patent Document 3 is used, as shown in FIG. 19, the rolling element accommodation belt 150 bent by the direction changing path 124 in the infinite circulation path 128 is not connected to the infinite circulation path 128. The connecting arm portion 152 of the rolling element housing belt 150 moves while rubbing against the side wall surface on the outer peripheral side of the guide grooves 160 and 138 of the linear portion. This is because the rolling element-accommodating belt 150 is originally formed in a straight line, so that a force for returning from a bent state to a straight state works.
Thus, in the technique described in Patent Document 3, the connecting arm portion of the rolling element housing belt moves while rubbing against the side wall surface on the outer peripheral side of the guide groove, thereby impairing the smooth circulation of the rolling element housing belt. become. In addition, the connecting arm portion may be worn by friction.

Further, in the technique described in Patent Document 4, a rolling element housing belt is provided in which the thickness of the spacer portion in a predetermined range is restricted. However, even in this configuration, the rolling element housing belt is incorporated in an infinite circulation path. The spacer can move in the outer circumferential direction from the state. Therefore, the connecting arm portion also moves while rubbing against the side wall surface on the outer peripheral side of the guide groove in the straight portion of the infinite circulation path. Therefore, there is a problem similar to the technique described in Patent Document 3.
Therefore, the present invention has been made paying attention to such a problem, and facilitates the work of assembling the rolling element into the rolling element accommodation belt, and the connecting arm portion of the rolling element accommodation belt has a guide groove. It is an object of the present invention to provide a rolling element accommodation belt for a linear motion guide device that can prevent friction with the side wall surface of the linear motion guide device, and a linear motion guide device including the rolling body accommodation belt.

  In order to solve the above-mentioned problem, the invention according to claim 1 is provided such that a guide rail having a rolling element guide surface and a guide rail are disposed so as to be relatively movable with respect to the guide rail and face the rolling element guide surface. A rolling element guide surface that forms a rolling element raceway together with the rolling element guide surface, a pair of direction change paths that respectively connect to both ends of the rolling element raceway, and a rolling element return path that communicates with the pair of direction change paths A plurality of rolling elements that circulate while rolling in an infinite circulation path composed of the rolling element raceway, the pair of direction change paths, and the rolling element return path, and the infinite circulation path. And a plurality of spacers interposed between the adjacent rolling elements, and the spacers are connected to each other. And from the end face of the spacer The endless circulation path has a connecting arm portion that protrudes to the side and is guided by the guide groove, and the rolling elements are individually accommodated in a rolling element accommodating portion defined by the spacer portion and the connecting arm portion. In the rolling element storage belt that is aligned in the alignment direction in the rolling element storage section, the rolling element storage section allows the rolling elements stored in the rolling element storage section to fall only in the outer peripheral direction of the infinite circulation path, and At least one of the two spacer portions that define the rolling element housing portion is incorporated in the endless circulation path, and the spacer portion cannot move in the outer circumferential direction from the incorporated state. Thus, it has a contact surface that contacts the rolling element.

  According to the first aspect of the present invention, the rolling element housing portion is configured to allow the rolling elements housed in the rolling body housing portion to fall off in the outer circumferential direction of the infinite circulation path. As a result, when the rolling element is incorporated into the rolling element accommodating portion of the rolling element accommodating belt, the rolling element can be accommodated simply by placing the rolling element on the rolling element accommodating portion from the side that allows the rolling element to fall off. . Therefore, there is no need for troublesome work such as pressing and incorporating the rolling element into the rolling element housing portion. Therefore, it is easy to incorporate the rolling elements into the rolling element accommodation belt.

  Furthermore, according to the first aspect of the present invention, at least one of the two spacers that define the rolling element housing portion is infinitely circulated by the contact surface of the spacer being in contact with the rolling element. It is comprised so that the said spacer part cannot move to the outer peripheral direction of a path | route. Thereby, even if the rolling element accommodation belt bent by the direction change path moves from the direction change path of the infinite circulation path to the straight line portion, the connecting arm portion connected to the spacer portion extends to the outer peripheral side of the guide groove. There is nothing. Therefore, the connecting arm portion is prevented from approaching the side wall surface on the outer peripheral side of the guide groove. Therefore, the connecting arm portion of the rolling element housing belt is prevented from moving while rubbing against the side wall surface of the guide groove.

The invention according to claim 2 is the rolling element accommodation belt for the linear motion guide device according to claim 1, wherein the rolling element accommodation belt is formed in an end shape, and the rolling element accommodation belt is formed. The spacer portions located at both end portions of the end portion having the end shape have the contact surfaces.
According to invention of Claim 2, in the spacer part located in the most front end side of a rolling element accommodation belt, the contact surface which the spacer part has contact | abuts to a rolling element, and it is in the outer peripheral direction of an infinite circuit. It is comprised so that the movement of the said spacer part is impossible. As a result, even when the rolling element housing belt is used with its ends being ended, when the slider is removed from the guide rail, the tip of the rolling element housing belt may jump out of the opening of the infinite circulation path. Absent. Therefore, the rolling element accommodation belt which makes handling of the linear motion guide device easier can be provided.

The invention according to claim 3 is the rolling element housing belt for the linear motion guide device according to claim 1 or 2, wherein the spacer is further within the endless circulation path than the contact surface. It has the escape part in the part which opposes the said rolling element in the edge part of the circumference side, It is characterized by the above-mentioned.
According to invention of Claim 3, even if the distance between adjacent spacer parts becomes narrow in the inner peripheral side of a direction change path by rolling-element accommodation belt bending in a direction change path, Mutual interference can be suppressed by the escape portion formed in the portion facing the rolling element on the inner peripheral side. Therefore, the rolling element housing belt can be circulated more smoothly.

The invention according to claim 4 is the rolling element housing belt for the linear motion guide device according to any one of claims 1 to 3, wherein the spacer portion is at least inside the connecting arm portion. The portion located on the circumferential side is characterized by a thin plate shape.
According to the invention described in claim 4, when the distance between the spacer portions adjacent on the inner peripheral side of the direction change path becomes narrow, even when the spacer portion and the rolling element interfere with each other, The seat can bend more easily. Therefore, the rolling element housing belt can be circulated more smoothly.

The invention described in claim 5 is a linear motion guide device, and includes the rolling element housing belt for linear motion guide device according to any one of claims 1 to 4. .
According to the fifth aspect of the present invention, it is possible to provide a linear motion guide device that exhibits the effect of the rolling element housing belt for the linear motion guide device according to any one of the first to fourth aspects.

The invention according to claim 6 is the linear motion guide device according to claim 5, wherein the guide groove has the connecting arm portion at least in the direction change path of the infinite circulation path. It is characterized by being formed so as to circulate closer to the inner circumference of the infinite circulation path than the central locus.
According to the sixth aspect of the present invention, when the rolling element housing belt is bent in the direction change path, the adjacent spacers are mutually connected, as compared with the case where the connecting arm portion is circulated on the center locus of the rolling elements. It can be opened widely. Thereby, since the distance between adjacent spacer parts spreads, interference with the spacer part and rolling element in a direction change path can be suppressed more suitably. Therefore, the rolling element accommodation belt of the linear motion guide device of the present invention can be circulated more smoothly.

  The invention according to claim 7 is the linear motion guide device according to claim 5 or 6, wherein the slider covers the inner surface of the slider except for a portion serving as the load rolling element guide surface. The rolling element row guide member is formed with the guide groove, and the guide groove formed in the rolling element row guide member has a side wall surface of the guide groove and the connection arm portion. It is characterized in that it is provided only on one side with respect to at least one.

The invention according to claim 8 is the linear motion guide device according to claim 5 or 6, wherein the guide groove is formed other than the rolling element raceway.
According to the invention described in claim 7 or 8, at least the side wall surface of the guide groove in the rolling element raceway is not formed on one side. Thereby, with respect to the configuration in which the side wall surfaces of the guide groove are provided on both sides, the space necessary for forming the guide groove can be reduced. Therefore, the groove of the rolling element guide surface of the guide rail can be made deeper by that amount. Therefore, since the contact length between the rolling element and the rolling element guide surface can be kept larger, the load capacity of the linear motion guiding device can be increased.

  ADVANTAGE OF THE INVENTION According to this invention, it is for the linear motion guide apparatus which can prevent the connection arm part of a rolling element accommodation belt from rubbing with the side wall surface of a guide groove while making the assembly | attachment operation | work of a rolling element into a rolling element accommodation belt easy. A rolling element accommodation belt and a linear motion guide device can be provided.

Hereinafter, embodiments of a rolling element housing belt for a linear motion guide device and a linear motion guide device according to the present invention will be described.
FIG. 1 is a perspective view showing a linear guide according to a first embodiment of a linear guide apparatus including a rolling element housing belt for a linear guide apparatus according to the present invention. 2 is an explanatory view showing the slider of the linear guide of FIG. 1 in a transverse section, and FIG. 3 is a sectional view of the linear guide of FIG.

As shown in FIGS. 1 and 2, the linear guide 10 includes a guide rail 12 having a rolling element guide surface 14 and a slider 16 straddling the guide rail 12 so as to be movable relative to the guide rail 12. And.
The guide rail 12 has a substantially square cross-sectional shape, and a total of four rolling element guide surfaces 14 are formed on each side of the guide rail 12 along the longitudinal direction.
As shown in FIG. 1, the slider 16 includes a slider body 17 and end caps 22 attached to both ends of the slider body 17 in the axial direction. The shape of the slider body 17 and the end cap 22 that are continuous in the axial direction is a substantially U-shaped cross-sectional shape.

  As shown in FIG. 2, the slider body 17 has a substantially semicircular load rolling element guide surface facing the respective rolling element guide surfaces 14 of the guide rail 12 inside the substantially U-shaped sleeves. A total of 4 strips are formed. Further, as shown in FIG. 3, the end cap 22 is formed with a pair of direction change paths 24 respectively connected to both ends of the load rolling element guide surface 18. Further, as shown in FIGS. 2 and 3, the slider body 17 communicates with the pair of direction change paths 24, and is a rolling element return path formed of a through hole having a circular cross section parallel to the load rolling element guide surface 18. 20 is formed inside the sleeve.

  As shown in FIG. 3, a space sandwiched between the rolling element guide surface 14 of the guide rail 12 and the load rolling element guide surface 18 of the slider body 17 facing the rolling member guide path 12 forms a rolling element track 26. ing. Then, a total of four infinite circulation paths 28 that are annularly continuous are formed by the pair of direction changing paths 24, the rolling element return paths 20, and the rolling element raceways 26.

Furthermore, as shown in the figure, each endless circulation path 28 is loaded with a plurality of balls 46 as rolling elements. The plurality of balls 46 in each endless circulation path 28 constitute a rolling element row 62 together with the rolling element accommodation belt 50 by the rolling element accommodation belt 50.
As shown in FIG. 2, the rolling element containing belt 50 has a connecting arm portion 52 that projects in the width direction in the endless circulation path 28, a guide groove 60 formed in the endless circulation path 28 of the slider 16, and a guide. The groove 38b is guided on both sides in the width direction.

Next, the rolling element accommodation belt 50 will be described in more detail.
FIG. 4 is a diagram for explaining the rolling element accommodation belt. FIG. 4A is a perspective view showing a part of the rolling element accommodation belt in an expanded state and an enlarged view, and FIG. The front view of the same figure (a) and the same figure (c) are explanatory drawings which expand and show a part of rolling body accommodating part shown to the same figure (b) in a cross section.

  The rolling element accommodating belt 50 is formed in an end shape, and as shown in FIGS. 3 and 4A, a spacer portion interposed between adjacent balls 46 in the endless circulation path 28. 51 and a belt-like connecting arm portion 52 that connects the spacer portions 51 on both sides of the endless circulation path 28 in the width direction. The spacer portion 51 and the connecting arm portion 52 are integrally formed from a flexible resin material, and the plurality of rolling element housing portions 55 defined by the spacer portion 51 and the connecting arm portion 52 are provided. The balls 46 are individually accommodated at a predetermined interval so as to be aligned as the rolling element row 62 in the arrangement direction in the endless circulation path 28 and to maintain a rollable state. In addition, the thickness of the connection arm part 52 which connects adjacent spacer parts 51 is formed thinly in the range which can maintain required and sufficient intensity | strength.

The connecting arm portion 52 has, for each rolling element housing portion 55, a ball housing hole 52 a that opens circularly in the front and back direction (thickness direction). The inner diameter of the ball accommodation hole 52a is slightly larger than the diameter of the accommodated ball 46.
As shown in FIG. 2, each spacer 51 has a substantially rectangular shape when viewed from the direction in which the balls 46 are arranged, and the short side of the substantially rectangular shape corresponds to the width direction of the belt-shaped connecting arm portion 52. They are provided almost in parallel. Each spacer 51 is connected to the center of the long side of a substantially rectangular shape by connecting arm portions 52 on both sides in the width direction.
The front shape of each spacer portion 51 is a shape that widens toward the end portion on one side (upper side in the drawing) of the connecting arm portion 52 as shown in FIG. The other side (the lower side in the figure) has a certain width.

  Specifically, the spacer portion 51 has a substantially trapezoidal shape on the upper side in the figure, and a portion connected by the connecting arm portion 52 is an upper base, and a lower bottom side is an end portion. The width (thickness) is gradually increased toward the surface. On the lower side of the figure, it is a thin plate-like substantially rectangular shape that extends downward with the same width as the upper base of the substantially trapezoidal shape. In this front shape, the height V of the spacer 51 is lower than the diameter A of the ball 46. Further, the predetermined interval B between the adjacent spacer portions 51 is slightly wider than the diameter of the ball 46, and the connecting arm portion 52 connects the adjacent spacer portions 51 to each other with the predetermined interval B. It is connected. In addition, the thickness U (refer FIG.4 (c)) of the connection arm part 52 is slightly smaller than the groove width of the guide groove 60 and the guide groove 38b mentioned later. Therefore, the connecting arm portion 52 of the rolling element housing belt 50 can be slidably engaged in the guide groove 60 and the guide groove 38b.

  The spacer 51 has a pair of rolling element contact surfaces 51 c corresponding to the spherical surface S that is the rolling surface of the ball 46. The pair of rolling element contact surfaces 51c are formed such that one rolling element contact surface 51c faces the adjacent one ball 46 side, and the other rolling element contact surface 51c faces the other adjacent ball 46 side. It is formed facing the opposite side to the one rolling element contact surface 51c.

  Specifically, the rolling element contact surface 51c is configured by two planar portions including a substantially rectangular side surface portion 51b of the spacer portion 51 and a slope portion 51a that constitutes a substantially trapezoidal side surface of the spacer portion 51. Has been. And the ball 46 accommodated in each rolling element accommodating part 55 is contact | abutted with the side part 51b formed toward the alignment direction where the ball 46 continues in the endless circulation path 28 in the both ends of the alignment direction. The inclined surface 51a constituting the side surface of the substantially trapezoidal shape is an abutting surface that abuts at a position of a predetermined angle α (15 ° in the present embodiment) with respect to the arrangement direction. The mating spacers 51 can be supported while being rotatably supported. Here, the predetermined angle α is desirably set in the range of 10 ° to 15 °. If the predetermined angle α is set in this range, the rolling element housing belt 50 can be smoothly circulated. When the predetermined angle α exceeds 15 °, when the distance between the adjacent spacer portions 51 becomes narrow in the direction change path, the spacer portions 51 and the ball 46 easily interfere with each other. Further, if the predetermined angle α is less than 10 °, it is difficult to secure a holding allowance for the ball 46.

In addition, the spacer portion escapes by forming a chamfer 51d and providing a gap at a portion where the inclined surface portion 51a of the rolling element contact surface 51c and the ball 46 face each other at the upper end portion in FIG. It has a part 51e.
In addition, the rolling element accommodation belt 50 is formed in an end shape, and the spacers 51 located at both ends of the end shape do not contain the ball 46 outside the end portion. Therefore, as illustrated in FIG. 4B, the spacers 51 at both ends are formed only by a plane whose surface facing the outside is continuous with the side surface 51 b.
And this rolling element accommodation belt 50 is assembled so that the direction of the substantially trapezoidal shape of the spacer 51 in the infinite circulation path 28 is directed toward the inner peripheral side of the infinite circulation path 28 as shown in FIG. It is. In the expanded state, the alignment direction of the balls 46 coincides with the longitudinal direction of the rolling element housing belt 50.

  Here, in the rolling element accommodation belt 50 incorporated in the endless circulation path 28 in this way, each rolling element accommodation portion 55 is the other side of the spacer portion 51 that defines each rolling element accommodation portion 55 ( The lower side in FIG. 4C has a certain width, and is incorporated toward the outer peripheral direction of the infinite circulation path 28. The predetermined interval B between the adjacent spacers 51 is set slightly wider than the diameter of the ball 46. Thereby, the ball 46 accommodated in each rolling element accommodating part 55 is detachable with respect to the outer peripheral direction of the infinite circulation path 28, and the drop-off is allowed. Further, each spacer 51 is provided with the above widened shape on the inner peripheral side of the infinite circulation path 28. As a result, the slope 51a of each spacer 51 is brought into contact with the ball 46, and in the state of being incorporated in the endless circulation path 28, the spacer is positioned in the outer circumferential direction of the endless circulation path 28 from the incorporated state. The part 51 cannot be moved.

Next, the linear guide 10 in which the rolling element row 62 described above is incorporated will be described in more detail.
As shown in FIG. 2, the inner side surface of the slider body 17 is covered with a rolling element row guide member 40 made of synthetic resin except for a portion that becomes the load rolling element guide surface 18. A slight space is formed between the rolling element row guide member 40 and the surface of the guide rail 12 facing the rolling element row guide member 40. A groove into which the above-described rolling element row 62 is inserted is constituted by the load rolling element guide surface 18 and the rolling element row guide member 40 inside the substantially U-shape of the slider body 17.

  Specifically, as shown in FIG. 5, the rolling body row guide member 40 forms a guide wall 36 b of the rolling body row 62 to form a groove. The distance between the guide walls 36 b is slightly larger than the diameter of the ball 46. And the guide groove 38b which engages the connection arm part 52 of the rolling element accommodation belt 50 is formed in the guide wall 36b continuously in the longitudinal direction. The groove width G of the guide groove 38 b is slightly larger than the thickness U of the connecting arm portion 52. Therefore, the connection arm part 52 of the rolling element accommodation belt 50 can be slidably engaged in the guide groove 38b.

  Here, the guide groove 38b is usually formed at a position where it can be engaged with the rolling element row guide member 40 so as to hold the connecting arm portion 52. In this embodiment, as shown in FIG. The rolling element row guide member 40 on the lower side of the figure is provided with a side wall surface 38c only on one side in the thickness direction of the connecting arm portion 52, and the guide groove 38b is opened toward the guide rail 12 side. Yes.

  As shown in FIGS. 2 and 6A, the thick portion of the sleeve portion of the substantially 17-shaped slider body is substantially parallel to each load rolling element guide surface 18 with a predetermined interval. An extending ball return passage 20 is formed. The ball return passage 20 includes a through hole 32 having a circular cross section that is continuous in the longitudinal direction, and a circulation tube 30 inserted into the through hole 32. This circulation tube 30 is a tube made of synthetic resin, and the cross-sectional shape continuous in the longitudinal direction of the internal space of the circulation tube 30 has an inner diameter slightly larger than the diameter of the ball 46 so that the ball 46 can pass through the inside. It has a substantially circular shape.

  And the surface facing each of a pair of connection arm part 52 which the rolling-element accommodation belt 50 which moves the inside of the circulation tube 30 has becomes the guide wall 36a. In the guide wall 36a, a guide groove 60 having a guideable width is formed continuously in the longitudinal direction while the connecting arm portion 52 is engaged. The groove width J of the guide groove 60 is slightly larger than the height U of the connecting arm portion 52. Therefore, the connecting arm portion 52 of the rolling element housing belt 50 can be slidably engaged in the guide groove 60. Therefore, the ball 46 and the rolling element accommodation belt 50 can move smoothly in the space in the circulation tube 30.

  As shown in FIG. 3, in the end cap 22, a pair of curved direction change paths 24 that are respectively connected to both ends of the rolling element raceway 26 are formed. The direction change path 24 is a curved through hole having a circular cross section that communicates with the ball return path 20 and is continuous in the longitudinal direction. The guide walls 36 a and 36 b of the rolling element row 62 are continuously formed across the direction change path 24. Inside the direction change path 24, the rolling element row 62 moves while the connecting arm portion 52 is elastically deformed and the entire rolling element row 62 rotates. In addition, the width of the guide groove 24b is increased in the direction change path 24 in consideration of the curvature according to the deformation range of the connecting arm portion 52.

  Here, the guide groove 24b in the direction change path 24 has a locus RL drawn by the center in the width direction of the connecting arm portion 52 as shown in FIG. It is formed closer to the inner periphery of the infinite circulation path 28 with respect to the drawn track CL. More specifically, in this embodiment, the center locus CL drawn by the center of the ball 46 is an arc having a radius of 4 mm, whereas the locus RL drawn by the center in the width direction of the connecting arm portion 52 is the direction change path 24. An arc having a radius of 3.3 mm is formed near the center of the inner guide groove 24b. A guide groove is formed in the endless circulation path 28 other than the direction change path 24 so that the locus RL drawn by the center in the width direction of the connecting arm 52 and the center locus CL of the ball 46 substantially coincide. Yes.

Next, functions and effects of the linear guide 10 will be described.
When the slider 16 is relatively moved in the axial direction of the guide rail 12, the linear guide 10 moves while the ball 46 rotates in the endless circulation path 28, and the rolling element accommodation belt 50 is also moved in the endless circulation path 28 together with the ball 46. To move. At this time, the spacer 51 of the rolling element containing belt 50 in the endless circulation path 28 pushes the ball 46 in front of its own moving direction, and the ball 46 is in front of its own moving direction. Press 51. Then, the rolling element row 62 moves in the direction opposite to the slider 16 in the rolling element raceway 26 and enters one direction changing path 24 that is continuous from one end of the rolling element raceway 26 to change the moving direction. The circulation is repeated by entering the ball return path 20 from the direction changing path 24 and moving in the same direction as the slider 16, entering the other direction changing path 24, changing the moving direction again, and returning to the rolling element track 26. That is, the entire rolling element row 62 can circulate in the endless circulation path 28.

And according to this linear guide 10, the rolling element accommodation belt 50 comprises the rolling element row | line | column 62 in which the ball 46 and the spacer part 51 were located in a line by accommodating the ball 46 in the rolling element accommodation part 55. FIG. can do.
According to this linear guide 10, since the spacer 51 is interposed between the balls 46 in the endless circulation path 28, the balls 46 are not in direct contact with each other. It is possible to prevent noise and wear from being generated due to the friction of each other. Since the spacer portions 51 are connected to each other by the connecting arm portion 52 to form the rolling element accommodation belt 50, the balls 46 are maintained in the endless circulation path 28 while maintaining a predetermined interval by the rolling element accommodation belt 50. The row 62 can be moved while maintaining a stable rotation.

  And according to this linear guide 10, the rolling element accommodation belt 50 is between the spacer parts 51 (a pair of rolling element contact surfaces 51c) before inserting the ball 46 between the adjacent spacer parts 51. The predetermined interval B is slightly larger than the diameter of the ball 46. Further, the rolling element accommodation portion 55 is configured to allow the balls 46 accommodated in the rolling element accommodation portion 55 to drop in the outer circumferential direction of the endless circulation path 28. As a result, when the ball 46 is assembled into the rolling element accommodating portion 55 of the rolling element accommodating belt 50, the side allowing the ball 46 to drop off is aligned on one side in the unfolded state, and the rolling from the direction is performed. It can be accommodated by simply placing the ball 46 on the moving object accommodating portion 55. Therefore, the efficiency of accommodating the ball 46 between the spacer portions 51 is improved, and there is no need for troublesome work such as pressing and incorporating the ball 46 into the rolling element accommodating portion 55. Therefore, the work of assembling the ball 46 into the rolling element housing belt 50 is easy.

  Furthermore, according to this linear guide 10, the connecting arm portion 52 of the rolling element housing belt 50 is guided in the endless circulation path 28 along the guide grooves 60, 38b, 24b, so that the rolling element housing belt 50 moves. The swinging of the rolling element row 62 is restricted and the entire rolling element row 62 can be moved accurately and smoothly in the endless circulation path 28. The spacer portion 51 that defines the rolling element housing portion 55 has a spacer portion 51a in the outer circumferential direction of the infinite circulation path 28 when the slope portion 51a that is a contact surface of the spacer portion 51 contacts the ball 46. 51 is configured to be impossible to move. As a result, even if the rolling element housing belt 50 bent in the direction change path 24 moves from the direction change path 24 of the endless circulation path 28 to the straight portion, the connecting arm portion 52 connected to the spacer portion 51 is a straight line. It does not spread to the outer peripheral side of the guide grooves 60, 38b. Therefore, the connecting arm portion 52 is prevented from approaching the outer peripheral side wall surface of the guide grooves 60 and 38b. Therefore, the connecting arm portion 52 of the rolling element housing belt 50 is prevented from moving while rubbing against the side wall surfaces of the guide grooves 60 and 38b.

  According to this linear guide 10, the ball 46 receives resistance in the rolling element raceway 26, but each ball 46 is pushed by the spacer portion 51 from the rear, so that the inside of the rolling element raceway 26 is smooth. I can move. Further, in the rolling element raceway 26, the interval between the guide walls 36b of the rolling element row 62 is only slightly larger than the diameter of the ball 46, and the connecting arm portion 52 of each rolling element accommodation belt 50 is guided. It is guided in the guide groove 38b of the wall 36b. For this reason, it is prevented that each spacer part 51 falls in the rolling element track 26, and the arrangement | sequence of the rolling element row | line | column 62 is disturbed and the smooth movement is also prevented.

  Further, according to the linear guide 10, the guide groove 38 b is provided with only the side wall surface 38 c on one side as the side wall surface of the guide groove 38 b with respect to the connecting arm portion 52. As a result, as shown in FIG. 8A, the space required for forming the guide groove 38b is reduced, and the groove depth D1 of the rolling element guide surface 14 of the guide rail 12 is formed deeper by that amount. can do.

  That is, as shown in FIG. 8B as a comparative example, when the side wall surface of the guide groove 38b is formed on both sides, a space S1 for forming the side wall surface is required in the left and right directions in FIG. Become. Therefore, the groove depth D2 of the rolling element guide surface 14 must be formed shallower than the groove depth D1 shown in FIG. Further, as shown in FIG. 8C as a comparative example, a configuration in which the connecting arm portion 52 is connected from the center O of the ball 46 by the offset amount S2 closer to the inner periphery of the infinite circulation path is also conceivable. The groove depth W2 of the load rolling element guide surface 18 must be formed shallower than the groove depth W1 shown in FIG. 8A by an amount corresponding to the offset amount S2. Thus, according to the configuration of the present embodiment, the rolling elements of the guide rail 12 can be obtained without reducing the groove depth of the load rolling element guide surface 18 compared to the configuration in which the side wall surfaces are provided on both sides of the guide groove. The groove of the guide surface 14 can be formed deeper. Therefore, the contact length between the ball 46 and the rolling element guide surface 14 can be kept longer, and the load capacity of the linear guide 10 can be increased.

  Moreover, according to this linear guide 10, the rolling element accommodation belt 50 is formed in the end shape, and also about the spacer part 51 located in the both ends which make an end shape, it is the same as the other spacer parts 51 Are provided with slope portions 51a. As a result, as shown in FIG. 9 (a), the spacer portion 51 of the both end portions is in contact with the ball 46, and the outer circumferential direction of the infinite circulation path 28 (the downward arrow Z direction in the figure). ) So that the spacer portion 51 cannot be moved at both ends. On the other hand, for example, as shown in FIG. 9B as a comparative example, in the configuration including the rolling element housing belt having the spacer portion 151 that does not have the slope portion that contacts the ball 46, the endless circulation path 28 The end spacer 151 is moved in the outer peripheral direction (downward arrow Z direction in the figure). As described above, according to the configuration of the present embodiment, even when the slider 16 is extracted from the guide rail 12, the spacer portions 51 at both ends are prevented from falling off the rolling element row 62 from the slider 16. The tip of the rolling element housing belt 50 does not jump out of the opening of the endless circulation path 28. Therefore, handling of the linear guide 10 can be made easier.

  Further, according to this linear guide 10, the guide groove 24 b in the direction change path 24 of the endless circulation path 28 circulates the connecting arm portion 52 closer to the inner periphery of the endless circulation path 28 than the center locus CL of the ball 46. It is formed to let you. Here, as shown in a comparative example in FIG. 10, when the connecting arm portion is circulated on the center locus of the rolling element, assuming that there is no deformation in each portion, a black portion in a circle indicated by reference numeral Y <b> 1 in FIG. 10. Thus, interference between the spacer 51 and the ball 46 occurs. On the other hand, as shown in FIG. 7, according to the configuration of the present embodiment, when the rolling element housing belt 50 bends in the direction change path 24, the adjacent spacer portions 51 are opened greatly from each other. Can do. As a result, the distance between the adjacent spacers 51 increases, so that the ball 46 can afford to escape radially outward, and the interference between the spacer 51 and the ball 46 in the direction change path 24 is more preferably suppressed. can do. Therefore, the rolling element accommodation belt 50 of the linear guide 10 can be circulated more smoothly.

Further, according to the linear guide 10, the spacer portion 51 has the escape portion 51 e at a portion facing the ball 46 accommodated in the rolling element accommodating portion 55 at the inner peripheral end of the endless circulation path 28. is doing.
Here, as shown in the comparative example in FIG. 11, the distance between the adjacent spacer portions 51 is narrowed on the inner peripheral side of the direction change path 24 by bending the rolling element accommodation belt 50 in the direction change path 24. In this case, assuming that there is no deformation in each part, in the part where the spacer part 51 and the ball 46 face each other on the inner peripheral side (the black-painted part in the circle indicated by the symbol Y2 in the same figure), the spacer part 51 and the ball Interference with 46 occurs slightly. On the other hand, as shown in FIG. 7, according to the configuration of the present embodiment, when the rolling element housing belt 50 bends in the direction change path 24, the distance between the adjacent spacer portions 51 is the direction change path. Even if it becomes narrow on the inner peripheral side of 24, mutual interference can be suppressed by the escape portion 51e formed in the portion where the spacer portion 51 and the ball 46 face each other on the inner peripheral side. Therefore, the rolling element accommodation belt 50 of the linear guide 10 can be circulated more smoothly.

  The rolling element return passage is not limited to the configuration exemplified above, and may be configured as shown in FIG. 6B, for example. That is, instead of the circulation tube 30, a member 30 </ b> A having a substantially crescent-shaped cross section is inserted into the through hole 32 provided in the slider body 17 to configure the ball return passage 20. Thereby, the guide groove 60 is comprised by the through-hole 32 and the substantially crescent-shaped member 30A. By adopting such a configuration, it becomes easy to reduce the diameter of the through hole as compared with the case using the circulation tube as described above. As a result, the thickness of the slider body can be increased accordingly, so that the rigidity of the slider body can be increased. Therefore, a highly rigid linear guide can be provided.

Next, a second embodiment of the linear motion guide device according to the present invention will be described. The second embodiment is the same as the first embodiment described above except that the configuration of the rolling element accommodation belt is partially different, so that the rolling element accommodation belt is the same. Differences are described, and other descriptions are omitted.
As shown in FIG. 12, this rolling element accommodation belt 70 is different from the rolling element accommodation belt 50 of the first embodiment in that it includes two types of spacers.

  One of the two types of spacers is the same as the spacer 51 described above. The other spacer portion 53 is different from the spacer portion 51 in that its front shape is substantially rectangular. That is, the front shape of the spacer portion 53 has a certain width in both the front and back directions of the connecting arm portion 52, and is a thin plate extending to the respective sides of the front and back directions with the same width as the upper base of the substantially trapezoidal shape. It has a shape.

  The spacer portions 51 and the spacer portions 53 are alternately arranged in the direction in which the balls 46 are arranged, and the spacer portions 51 and 53 are connected by connecting arm portions 52 at substantially the centers on both sides in the width direction. ing. Then, the rolling element accommodating portion 75 is defined by the spacer portions 51 and 53 and the connecting arm portion 52. And this rolling-element accommodation belt 70 is integrated in a linear guide by making the upper side of the figure the inner peripheral side of the infinite circulation path 28 like the said 1st embodiment.

  Even in such a configuration, the balls 46 accommodated in the respective rolling element accommodating portions 75 are detachable in the outer circumferential direction of the infinite circulation path 28 as in the first embodiment, and the omission of the balls 46 is possible. Is acceptable. Furthermore, the spacer 51 is provided with the above widened shape on the inner peripheral side of the endless circulation path 28. As a result, the slope 51 a of each spacer 51 comes into contact with the ball 46, thereby making it impossible for the spacer 51 to move in the outer circumferential direction of the infinite circulation path 28. As shown in FIG. 13, the spacer portion 53 hardly moves to the outer peripheral side of the endless circulation path 28 because the spacer portions 51 on both sides of the spacer portion 53 abut against the ball 46. Therefore, similarly to the first embodiment, the movement of the connecting arm portion 52 toward the outer peripheral side of the endless circulation path 28 is suppressed, and the connecting arm portion of the rolling element housing belt 70 may rub against the side wall surface of the guide groove. Is prevented. Further, the drop of the ball 46 accommodated in the rolling element accommodating portion 75 is also permitted in one of the front and back directions of the connecting arm portion 52 (the lower side in FIG. 5B). The work of assembling the ball 46 into the head is also easy. Therefore, it is possible to provide a linear guide that exhibits the same functions and effects as those of the first embodiment.

Next, a third embodiment of the linear motion guide device according to the present invention will be described. The third embodiment is the same as the above-described embodiments except that the configuration of the rolling element-accommodating belt is partially different from that of the above-described embodiments. The point will be described, and other description will be omitted.
As shown in FIG. 13, this rolling element accommodation belt 71 is different from the rolling element accommodation belts of the above embodiments in that it includes three types of spacers.

  Of the three types of spacers, the spacer 53 is the same as the spacer in which the front shape in the second embodiment is substantially rectangular, and the entire spacer of the rolling element containing belt 71. It is provided only at one central location. The other two types of spacers 54 and 55 are arranged in plural on both sides of the spacer 53 as shown in FIG. These spacers 53, 54, and 55 are both thin plate-like. In addition, the thickness of each spacer in this embodiment is 0.44 mm.

  The spacer portions 54 and 55 are formed by bending one side (the upper side in the figure) of the connecting arm portion 52 in the front and back direction toward the spacer portion 53 side. As shown in the enlarged view of FIG. 2C, this curved shape is curved so as to follow the surface of the ball 46 from the vicinity of the predetermined angle α in the first embodiment and is in contact with the angle β. Forms a tangent surface. In the figure, the spacer portion 54 is illustrated, but the shape of the spacer portion 55 is the same except that the bending direction is reversed. And this rolling-element accommodation belt 71 is integrated in a linear guide by making the upper side of the figure the inner peripheral side of the infinite circulation path 28 like the said 1st embodiment.

  Even in such a configuration, the balls 46 accommodated in the respective rolling element accommodating portions 76 can be detached from the outer circumferential direction of the endless circulation path 28 as in the above-described embodiments, and are allowed to drop off. Is done. Further, the spacers 54 and 55 do not move to the outer peripheral side of the endless circulation path 28 because the curved contact surfaces of the spacers 54 and 55 come into contact with the ball 46. Furthermore, the spacer portions 54 and 55 on both sides also come into contact with the ball 46 with respect to the spacer portion 53 at one place, so that it can hardly move to the outer peripheral side of the infinite circulation path 28. Therefore, it is possible to provide a linear guide that exhibits the same functions and effects as the above embodiments.

  Moreover, according to this 3rd embodiment, the part located in the inner peripheral side rather than the connection arm part of the spacer parts 53, 54, and 55 is formed in thin plate shape in the front shape. . As a result, as shown in FIG. 15, when the distance between the adjacent spacer portions becomes narrower on the inner peripheral side of the direction change path 24, the portion where the spacer portion and the ball 46 face each other on the inner peripheral side. Even when the spacer portion and the ball 46 interfere with each other (the portion indicated by the symbol Y3 in the figure), the thin and plate-like spacer portion can bend more easily. Therefore, the rolling element housing belt 71 of the linear guide can be circulated more smoothly. In addition, in the part shown with the code | symbol Y3 of the same figure, when the spacer part does not deform | transform, the image which interference has shown is shown with the dashed-two dotted line.

Next, a fourth embodiment of the linear motion guide device according to the present invention will be described. The fourth embodiment is the same as the above-described embodiments except that the configuration of the rolling element housing belt is partially different, and the other configuration is the same. The point will be described, and other description will be omitted.
As shown in FIG. 16, the rolling element accommodation belt 72 has a circular shape as viewed from the direction in which the spacers 56 are arranged. Moreover, the point which comprises the rolling element contact surface 56c of the spacer part 56 from the combination of a curved surface differs from the rolling element accommodation belt 50 of said 1st embodiment.

  In the example of the figure, the surface to be the contact surface is formed of a conical surface 56a that contacts the ball 46 at an angle α with the vertical straight line VL passing through the center O of the ball 46 to be accommodated. . The surface corresponding to the side surface portion is formed by a cylindrical surface 56b having a straight line VL as an axis and a diameter slightly larger than the diameter of the ball 46 to be accommodated. And this rolling-element accommodation belt 72 is integrated in a linear guide like the said 1st embodiment by making the upper side of the same figure into the inner peripheral side of the infinite circulation path 28. FIG.

  Even in such a configuration, the balls 46 accommodated in the respective rolling element accommodating portions 77 are detachable in the outer circumferential direction of the infinite circulation path 28 and are allowed to drop off. Therefore, the work of assembling the ball 46 into the rolling element housing belt 77 is easy. Further, the spacer 56 does not move to the outer peripheral side of the endless circulation path 28 because the curved contact surface contacts the ball 46. Therefore, the connecting arm portion 52 of the rolling element housing belt 77 does not rub against the side wall surface of the guide groove.

Moreover, according to this 4th embodiment, the spacer part 56 of the rolling element accommodation belt 72 is the horizontal direction of each spacer part 56 (width direction of the rolling element accommodation belt 72, the paper surface in the same figure (b)). The movement in the vertical direction is also restrained by the ball 46. For this reason, it is possible to reduce the own vibration associated with the circulation of the rolling element housing belt 72 and to obtain a smoother circulation.
As described above, according to each of the above-described embodiments, the work of assembling the ball 46 into the rolling element accommodation belt is facilitated, and the connecting arm portion of the rolling element accommodation belt is rubbed against the side wall surface of the guide groove. A linear guide that can be prevented can be provided.

The linear motion guide device according to the present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention.
For example, in each of the above embodiments, the lower rolling element row guide member 40 is provided with the side wall surface 38c only on one side in the thickness direction of the connecting arm portion 52, and the guide groove 12 is directed toward the guide rail 12 side. Although an example in which 38b is opened has been described, the present invention is not limited to this. For example, as shown in FIG. 17, the guide groove in the rolling element raceway 26 may not be provided on both sides of the connecting arm portion 52. Even with such a configuration, according to the rolling element housing belt of each of the above embodiments, the spacer portion does not move to the outer peripheral side of the endless circulation path 28, and thus an effect of preventing the rolling element accommodation belt from popping out is obtained. It is done. And since a space required in order to form a guide groove can be reduced, the groove | channel of the rolling-element guide surface of a guide rail can be made deeper by that much.

Further, according to each of the embodiments described above, the example is described in which the trajectory RL drawn by the center in the width direction of the connecting arm portion 52 and the center trajectory CL of the ball 46 substantially coincide with each other, but the present invention is not limited to this. As shown in FIG. 18, the connecting position of the connecting arm portion 52 is configured at a position shifted by an offset amount S2 on the inner peripheral side of the infinite circuit 28. A guide groove may be provided on the side. However, in this case, as shown in FIG. 8C described above, the connecting arm portion 52 is connected from the center O of the ball 46 by the offset amount S2 closer to the inner circumference of the endless circulation path. The groove depth W2 of the guide surface 18 is formed shallower than the groove depth W1 in the above embodiments by an amount corresponding to the offset amount S2. Therefore, in order to keep the contact length between the ball and the rolling element guide surface longer and increase the load capacity of the linear guide, the configurations in the above embodiments are preferable.
In each of the above-described embodiments, the linear guide 10 having the ball 46 as the rolling element has been described as an example. However, the linear guide device is not limited to this, and the linear guide device can also be applied to a roller guide having a roller as the rolling element. .

It is a perspective view which shows the linear guide which concerns on 1st embodiment of a linear motion guide apparatus provided with the rolling element accommodation belt for linear motion guide apparatuses which concerns on this invention. It is explanatory drawing which shows the slider of the linear guide of FIG. 1 in a cross section. It is sectional drawing in the XX line part in the linear guide of FIG. It is a figure explaining a rolling element accommodation belt, The figure (a) is a perspective view which expands and shows a part in the state which unfolded and extended the rolling element accommodation belt, The figure (b) is the figure (a). (C) is an explanatory view showing an enlarged cross section of a part of the rolling element housing portion shown in (b). It is sectional drawing perpendicular | vertical to the longitudinal direction in the rolling element track of the linear guide shown in FIG. The figure (a) is a sectional view perpendicular to the longitudinal direction in the rolling element return passage of the linear guide shown in FIG. FIG. 4B is a diagram for explaining a modification thereof. It is explanatory drawing which expands and shows the part of the direction change path of the linear guide shown in FIG. It is a figure explaining the effect | action of the linear guide which concerns on 1st embodiment. It is a figure explaining the effect | action of the linear guide which concerns on 1st embodiment. It is a figure explaining the effect | action of the linear guide which concerns on 1st embodiment. It is a figure explaining the effect | action of the linear guide which concerns on 1st embodiment. It is explanatory drawing of 2nd embodiment of the linear motion guide apparatus which concerns on this invention. It is a figure explaining the effect | action of the linear guide of 2nd embodiment. It is explanatory drawing of 3rd embodiment of the linear motion guide apparatus which concerns on this invention. It is a figure explaining the effect | action of the linear guide of 3rd embodiment. It is explanatory drawing of 4th embodiment of the linear motion guide apparatus which concerns on this invention. It is explanatory drawing of the modification of the linear motion guide apparatus which concerns on this invention. It is explanatory drawing of the modification of the linear motion guide apparatus which concerns on this invention. It is a figure explaining an example of the linear guide apparatus which concerns on a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Linear guide 12 Guide rail 14 Rolling body guide surface 16 Slider 17 Slider main body 18 Load rolling body guide surface 20 Rolling body return path 22 End cap 24 Direction change path 26 Rolling body track 28 Endless circulation path 38c Side wall surface 24b, 38b, 60 Guide groove 40 Rolling element row guide member 46 Ball (rolling element)
50, 70, 71, 72, 77 Rolling body accommodation belt 51 Spacer 51a Slope (contact surface)
51e Escape part 52 Connection arm part 53, 54, 55, 56 Spacer part 55, 75, 76, 77 Rolling body accommodation part 56a Conical surface (contact surface)
62 Rolling element train

Claims (8)

A guide rail having a rolling element guide surface, and a load rolling element that is disposed so as to be relatively movable with respect to the guide rail and that forms a rolling element raceway with the rolling element guide surface so as to face the rolling element guide surface. A slider having a guide surface, a pair of direction changing paths respectively connected to both ends of the rolling element raceway, and a rolling element return passage communicating with the pair of direction changing paths, the rolling element raceway, and the pair of direction changing paths And a plurality of rolling elements that circulate while rolling in an infinite circulation path constituted by the rolling element return passages, and a guide groove formed inside thereof along the infinite circulation path. A plurality of spacers that are used in the apparatus and are interposed between the adjacent rolling elements, and the spacers are connected to each other, and projecting outward from an end surface of the spacers to the guide grooves. Has a guided arm to be guided In the rolling elements accommodation belt aligning the rolling elements housed individually in the rolling element accommodating portion defined by the connecting arm portion and the spacer portion in the alignment direction in the endless circulation passage,
The rolling element accommodating portion allows the rolling elements accommodated in the rolling element accommodating portion to drop only in the outer circumferential direction of the infinite circulation path, and includes two spacers that define the rolling element accommodating portion. At least one of them has a contact surface that comes into contact with the rolling element so that the spacer cannot move in the outer circumferential direction in the state where it is incorporated in the endless circulation path. A rolling element housing belt for a linear motion guide device. The rolling element housing belt is formed in an end shape,
The rolling element accommodation belt for a linear motion guide device according to claim 1, wherein spacer portions located at both ends of the end of the rolling element accommodation portion have the contact surfaces.   The said spacer part has a relief part in the part which opposes the said rolling element in the edge part of the inner peripheral side of the said infinite circuit further than the said contact surface. Rolling element accommodation belt for linear motion guide device.   4. The linear motion guide device according to claim 1, wherein at least a portion of the spacer portion located on the inner peripheral side of the connecting arm portion is a thin plate shape. 5. Rolling element housing belt.   A linear motion guide device comprising the rolling element housing belt for the linear motion guide device according to claim 1.   The guide groove is formed so as to circulate the connecting arm portion closer to the inner periphery of the endless circulation path than at the center locus of the rolling element in at least the direction change path of the endless circulation path. The linear motion guide device according to claim 5. The slider includes a rolling element row guide member that covers an inner surface thereof excluding a portion that becomes the load rolling element guide surface, and the guide groove is formed in the rolling element row guide member.
The guide groove formed in the rolling element row guide member is provided with a side wall surface of the guide groove only on one side with respect to at least one of the connecting arm portions. Linear motion guide device.   The linear motion guide device according to claim 5, wherein the guide groove is formed other than the rolling element raceway.

Images