JP2013117288A - Ball holder and linear guide device with the ball holder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ball holder in which a pawl of each hook is easy to engage with each other and hardly disengages, and to provide a linear guide device with the ball holder.SOLUTION: A ball holder has a frame shape with a pair of facing long sides, and a hook provided at each long side protrudes to the facing long side. A pawl formed at each hook can engage with the other hook. The each hook can be in engagement as each pawl engages with the other hook each other. A hole is provided at each hook, and each pawl is formed in a size to be insertable into the hole provided at the other hook. Each pawl in engagement is inserted into the hole provided at the other hook such that each pawl engages with the other hook each other.

Description

  The present invention relates to a ball cage and a linear guide device including the ball cage.

  A linear guide device used by being attached to a conveying device, a machine tool or the like includes a guide rail and a slider attached to the guide rail through a number of steel balls so as to be slidable in the axial direction of the guide rail. Yes. The slider is provided with a ball holder. The steel ball is held on the slider by a ball holder. The ball cage has two roles when assembled to the slider. One is to keep the ball loaded on the slider from dropping, and the other is to make it easier to load the ball when loading the slider.

  For example, Patent Literature 1 describes a ball holder that can load a steel ball into a slider or take out a loaded steel ball without removing an end cap or a ball holder from the slider. ing.

  FIG. 10A shows a bottom view of such a conventional ball cage, that is, a state in which the ball cage assembled to the slider is viewed from below, and FIG. It is sectional drawing of the hook part in a line. FIG. 11 is a cross-sectional view of the hook portions, showing a state where they are engaged with each other.

  As shown in FIG. 10A, the ball cage 946 is formed in a rectangular frame shape by a pair of long side portions 956 and a pair of short side portions 958. The ball cage 946 is disposed on the slider so that the long side portion 956 is parallel to the axial direction of the linear guide device. Both long side portions 956 are provided with ball holding grooves 960 for supporting the steel balls. As shown in FIG. 10B, engagement hook portions 974 that project toward the opposed long side portions 956 are provided on the inner side of the center portion of each long side portion 956. As shown in FIG. 10 (b), the engagement hook portions 974 face each other with a space therebetween, as shown in FIG. 10 (b). When the steel balls are taken out, they can be engaged with each other.

  The engagement hook portion 974 is engaged using a tool or the like. That is, the two engaging hook portions 974 are moved closer to each other with a tool or the like. Then, as shown in FIG. 11, both the engaging hook portions 974 are hooked with each other. When the engagement hook portions 974 are engaged with each other as described above, the center portions of the long side portions 956 of the ball cage 946 are deformed inward, and are bent like a bow. When the long side portion 956 is bent like a bow, the distance between the center portion of the long side portion 956 and the slider is widened. Then, the steel ball can be easily loaded into the slider from the portion where the interval is widened, or the steel ball can be taken out from the slider.

Japanese Utility Model Publication No. 6-19855

  As shown in FIG. 11, the hook portions in the conventional ball cage are engaged with each other by hooking claw portions 978 formed on the hook portions 974. However, in such a conventional ball cage, the claws 978 are difficult to catch. Further, even in a state of being hooked with each other, the tip of each claw portion 978 is not hooked to the base side of the other claw portion 978 as shown in FIG. That is, a gap S that is not caught by the other claw portion 978 is formed on the catch surface of each claw portion 978 on the base side. If it does so, the catch of each nail | claw part 978 will be in the state which is easy to remove | deviate. In particular, a small cage is likely to come off.

  The present invention has been made in view of such a situation, and provides a ball cage in which the claw portions of the hook portions are easily hooked and are not easily detached, and a linear guide device including the ball cage. Let it be an issue.

  In order to achieve the above object, a ball cage according to the present invention comprises a guide rail and a slider disposed on the guide rail so as to be movable in the axial direction of the guide rail via a plurality of balls. A frame-shaped shape having a pair of opposed long sides is used in a linear guide device in which a plurality of rolling grooves for rolling the plurality of balls are formed on a surface of the slider facing the guide rail. Each of the pair of long side portions is formed with a ball holding groove facing the rolling groove, and each long side portion is provided with a hook portion protruding toward the facing long side portion. Each hook part is formed with a claw part that can be hooked to the other hook part, and each hook part is separated from each other with a gap between each claw part, Are caught on the other hook part. In the engaged state, the pair of long side portions are respectively deformed, and in the ball cage that holds the deformed state, each hook portion includes A hole is provided, and each of the claw portions is formed to have a size that can be inserted into the hole provided in the other hook portion. In the engaged state, each claw portion is the other hook portion. A ball cage, wherein the ball holder is engaged with the other hook part by being inserted into the hole provided in the hole.

  Preferably, in the ball cage according to the present invention, the hole provided in each hook portion has a flat inner wall on the other hook portion side, and is formed in the flat surface and each hook portion. The surface hooked on the other hook part of the claw part is formed as one plane.

  Preferably, in the ball cage according to the present invention, in the engaged state, a surface of the claw portion that is hooked on the other hook portion substantially contacts the inner wall of the other hole. It is characterized by.

  Preferably, in the ball cage according to the present invention, each of the claw portions is inclined with respect to a plane formed by the pair of long side portions on the side facing the other claw portion. It is characterized by that.

  Preferably, in the ball cage according to the present invention, each of the claw portions has a plane parallel to a plane formed by the pair of long side portions.

  Preferably, the ball holder according to the present invention is characterized in that the hole formed in each hook portion has a substantially rectangular cross section.

  Preferably, the ball holder according to the present invention is characterized in that the hole formed in each hook portion is substantially oval in cross section having a pair of parallel lines.

  Preferably, in the ball cage according to the present invention, the hole formed in each hook part has a substantially trapezoidal cross section.

  Preferably, the ball cage according to the present invention is characterized in that the hole formed in each hook portion has a substantially hexagonal cross section.

  Preferably, the linear guide device according to the present invention includes any one of the ball cages described above.

  ADVANTAGE OF THE INVENTION According to this invention, the nail | claw part of each hook part is easy to be mutually caught, and a ball holder which is hard to come off, and a linear guide apparatus provided with this ball holder can be provided.

1 is a perspective view showing a configuration of a linear guide device according to a first embodiment with a part cut away. It is a side view of the principal part of the linear guide apparatus which concerns on 1st Embodiment, and has shown it notching one part. (A) is a bottom view which shows the whole shape of the ball holder concerning a 1st embodiment, and (b) is an enlarged view of the portion surrounded by a circle of (a). It is sectional drawing of the II line | wire of Fig.3 (a), and has shown the state which looked at the ball holder of the horizontal state from the axial direction. (A) is an expanded sectional view of a pair of hook part shown in FIG. 4, (b) is a perspective view of one hook part. It is sectional drawing of a pair of hook part which concerns on 1st Embodiment, (a) shows the state which the surfaces which each hook part opposes, (b) shows the state which has mutually engaged. ing. It is a bottom view which shows the shape of the ball holder in the state in which the hook parts are mutually engaged. (A), (b), (c), (d) are a pair of ball cages according to the first example, the second example, the third example, and the fourth example of the second embodiment, respectively. It is sectional drawing of one hook part among hook parts. (A), (b), (c), and (d) are through holes of the ball cages according to the first example, the second example, the third example, and the fourth example of the third embodiment, respectively. It is the enlarged view of the vicinity, (e) is sectional drawing of one hook part of the ball holder which concerns on 4th Example. (A) is a bottom view of a conventional ball cage, and (b) is a cross-sectional view taken along line XX of (a). It is an expanded sectional view of the engagement hook part of the conventional ball cage, and shows the state where each engagement hook part is mutually engaged.

  Hereinafter, a linear guide device according to an embodiment of the present invention will be described with reference to the drawings. In this specification, in the state where the guide rail is normally horizontal, the longitudinal direction of the guide rail is the axial direction, the direction perpendicular to the horizontal direction with respect to the axial direction is the width direction, the axial direction and The direction perpendicular to the width direction is the up and down direction. Further, at this time, the upper surface, the lower surface, and the both surfaces extending in the axial direction are respectively referred to as an upper surface, a lower surface, and a side surface, and a surface on the end portion side in the axial direction is defined as an end surface. Further, these directions and names of the respective surfaces are the same in the state where the slider is assembled to the guide rail in the slider and the ball cage assembled to the slider.

(First embodiment)
FIG. 1 is a perspective view showing a configuration of the linear guide device 1 according to the first embodiment with a part thereof cut away. FIG. 2 is a side view of the main part of the linear guide device 1, with a part cut away.

  As shown in FIG. 1, a linear guide device 1 is configured such that a guide rail 4 having a substantially square cross section extending in the axial direction and a steel ball 7 which is a rolling element are movable on the guide rail 4 in the axial direction. And a slider 10 attached thereto. The slider 10 has a concave portion 13 extending in the axial direction on the lower surface side, and the cross-sectional shape viewed from the axial direction is substantially U-shaped. The recess 13 is formed through both end faces of the slider 10. The slider 10 has a recess 13 disposed on the guide rail 4 across the guide rail 4.

  An upper rolling groove 16 for rolling the steel ball 7 extends in the axial direction at the ridge line where the side surface 4a and the upper surface 4c on one side of the guide rail 4 intersect. The upper rolling groove 16 is formed in a substantially arc shape in cross section. A similar upper rolling groove 16 is also formed in the ridge line portion between the side surface 4b and the upper surface 4c on the other side of the guide rail 4. Further, a lower rolling groove 17 for rolling the steel ball 7 extends in the axial direction at a substantially intermediate position in the vertical direction of the side surface 4a on one side of the guide rail 4. The lower rolling groove 17 is formed in a substantially ½ arc shape in cross section. An escape groove 18 is formed at the bottom of the lower rolling groove 17 over the entire length of the lower rolling groove 17. A similar lower rolling groove 17 and escape groove 18 are formed at a substantially intermediate position in the vertical direction of the other side surface 4 b of the guide rail 4. As described above, the guide rail 4 is formed with four rolling grooves 16 and 17 in total on the side surfaces 4a and 4b, two on each of the upper and lower sides.

  The slider 10 includes a slider main body 19 and end caps 22 a and 22 b that are detachably attached to respective end portions in the axial direction of the slider main body 19. The slider main body 19 includes a pair of leg portions 25 a and 25 b arranged to extend downward along the side surfaces 4 a and 4 b of the guide rail 4, and a pair of leg portions 25 a and 25 b on the upper surface of the guide rail 4. It is comprised from the trunk | drum 28 connected on the 4c side. Side seals 31a and 31b, which are dust-proof parts, are provided at the axial ends of the end caps 22a and 22b opposite to the slider main body 19 side, that is, at the outermost ends in the axial direction of the slider 10, respectively. It is installed. These side seals 31a and 31b seal the gap between the guide rail 4 and the bearing 10, and prevent foreign matters such as dust from entering from the outside.

  On the inner surface of one leg 25a of the slider body 19, that is, the surface facing the side surface 4a on one side of the guide rail 4, the upper rolling groove 16 and the lower side rolling formed on the one side surface 4a. An upper rolling groove 34 and a lower rolling groove 35 for rolling the steel ball 7 are formed at positions facing each of the rolling grooves 17. A similar upper rolling groove 34 (not shown) and lower rolling groove 35 (not shown) are also formed on the inner side surface of the other leg portion 25b of the slider body 19. An upper rolling path 37 for rolling the steel ball 7 is formed by the upper rolling groove 16 of the guide rail 4 and the upper rolling groove 34 of the slider body 19. Further, a lower rolling path (not shown) for rolling the steel ball 7 is formed by the lower rolling groove 17 of the guide rail 4 and the lower rolling groove 35 of the slider main body 19. . Thus, the guide rail 4 and the slider 10 are formed with four rolling paths in total, two on each side, one on the upper side and the other on the lower side.

  Further, one leg portion 25a of the slider 10 has an upper straight path 40 and a lower straight line that penetrate the thick portion of the leg portion 25a in the axial direction in parallel with the upper rolling path 37 and the lower rolling path, respectively. A path 41 is formed. That is, two straight paths 40 and 41 are formed on one leg portion 25a. Similarly, an upper straight path 40 (not shown) and a lower straight path 41 (not shown) are formed on the other leg 25b of the slider 10 as well.

  The end caps 22 a and 22 b are on the contact surface side with the slider main body 19 and correspond to the pair of legs 25 a and 25 b of the slider main body 19. A semi-doughnut-shaped upper curved path (not shown) that communicates with the straight path 40, and a semi-doughnut-shaped lower curved path (not shown) that communicates the lower rolling path (not shown) and the lower straight path 41. ) And are formed. Each end cap 22a, 22b is formed with a total of four curved paths with two on one side. The upper straight path 40 and the upper curved path at both ends form an upper return path that feeds and circulates the steel ball 7 from one end of the upper rolling path 37 to the other end, and the upper return path An annular upper circulation path 43 is formed by the upper rolling path 37. Similarly, a lower return path that feeds and circulates the steel ball 7 from one end of the lower rolling path (not shown) to the other end is formed by the lower straight path 41 and the lower curved path at both ends. An annular lower circulation path (not shown) is formed by the lower return path and a lower rolling path (not shown). That is, a total of four circulation paths are formed in the guide rail 4 and the slider 10. A large number of steel balls 7 are slidably loaded in the annular upper circulation path 43 and the lower circulation path, respectively. The slider 10 moves in the axial direction on the guide rail 4 through these many steel balls 7.

  As shown in FIGS. 1 and 2, a ball cage 46 is disposed in the recess 13 of the slider 10 in parallel with the upper surface 4 c of the guide rail 4. As shown in FIG. 2, locking portions 48 projecting in the axial direction are formed at both ends in the axial direction of the ball cage 46. Further, on the contact surface side of the end caps 22a and 22b with the slider main body 19, recessed portions 50 that are engaged with the respective locking portions 48 of the ball cage 46 are formed. The ball holder 46 is supported by the slider 10 by engaging the locking portions 48 at both ends with the recesses 50 of the end caps 22a and 22b. The ball cage 46 supports the steel balls 7 located on the upper rolling path 37 and prevents the steel balls 7 from falling off the upper rolling path 37. The detailed configuration of the ball holder 46 will be described later.

  Further, the slider 10 is provided with a rod-shaped ball cage 52 for supporting the steel ball 7 located in the lower rolling path. Both ends of the rod-shaped ball cage 52 are supported by the end caps 22 a and 22 b, and the other portions are accommodated in the escape grooves 18 of the guide rail 4.

  When the slider 10 is moved along the axial direction of the guide rail 4, the steel balls 7 positioned in the upper rolling path 37 and the lower rolling path (not shown) are respectively moved to the upper rolling path 37 and the lower rolling path. It moves in the same direction as the slider 10 with respect to the guide rail 4 while rolling in the moving path. When the steel balls 7 reach the end portions on one side of the upper rolling path 37 and the lower rolling path, respectively, an upper curved path (not shown) and a lower side provided in the end cap 22a (or 22b). Each enters a curved path (not shown). The steel balls 7 entering each curved path make a U-turn and enter the upper straight path 40 and the lower straight path 41, respectively, and roll in the straight paths 40, 41 to enter the opposite end cap 22b (or 22a). To the upper curved path (not shown) and the lower curved path (not shown). Then, the U-turn is made again on the curved path on the opposite side, and the upper rolling path 37 and the lower rolling path are returned to the other ends. As the slider 10 moves, the steel ball 7 repeats such circulation in the upper circulation path 43 and the lower circulation path.

  Further, the guide rail 4 is provided with a bolt hole 54 for attaching the guide rail 4 to a mounting portion such as a machine tool.

  Next, the configuration of the ball holder 46 will be described. FIG. 3A is a bottom view showing the overall shape of the ball cage 46. That is, the ball holder 46 assembled to the slider 10 is viewed from below. FIG. 3B is an enlarged view of a portion surrounded by a circle in FIG. FIG. 4 is a cross-sectional view taken along the line II of FIG. 3A and shows a state in which the ball cage 46 in the horizontal state is viewed from the axial direction. In FIG. 4, the steel ball 7 held on the slider 10 by the ball holder 46 is indicated by a one-dot chain line.

  The ball cage 46 is an injection molded product of a synthetic resin material, and is formed into a rectangular frame shape by a pair of long side portions 56R and 56L and a pair of short side portions 58a and 58b, as shown in FIG. (Hereinafter, the ball holder 46 is referred to as “frame holder 46”). The pair of long side portions 56R and 56L and the pair of short side portions 58a and 58b are formed on the same plane. The frame type holder 46 has long side portions 56R, 56L parallel to the axial direction of the guide rail 4 between the lower surface of the body portion 28 of the slider main body portion 19 and the upper surface 4c of the guide rail 4, and the short side portion 58a. , 58b are arranged so as to be parallel to the width direction of the guide rail 4. Ball holding grooves 60R and 60L having a substantially arc-shaped cross section are provided over the entire length of the long side portions 56R and 56L at the ridge line portions between the outer side surfaces and the lower surface of the long side portions 56R and 56L. . Accordingly, the upper edges 62R and 62L of the ball holding grooves 60R and 60L are located on the outer side surfaces of the long side portions 56R and 56L, respectively, and the lower edges 64R and 64L are located on the lower surfaces of the long side portions 56R and 56L, respectively. . In a state where the frame type holder 46 is assembled to the slider 10, there is a gap between the lower edges 64R and 64L of the ball holding grooves 60R and 60L and the lower edges 66 and 66 of the upper rolling groove 34, respectively. During normal use, a gap L having a width slightly narrower than the diameter of the steel ball 7 is formed. With such a configuration, the ball holding grooves 60R and 60L respectively hold the steel balls 7 that roll on the upper rolling grooves 34 formed in the leg portions 25a and 25b of the slider main body portion 19.

  On the inner side of each of the long side portions 56R and 56L, flat plate portions 68R and 68L extending inward, that is, toward the opposing long side portions 56L and 56R, are formed. Each flat plate portion 68R, 68L extends to a distance of about 1/4 to 1/3 of the distance to the intermediate line between the long side portions 56R, 56L. Extending portions 70R and 70L that extend inward to the vicinity of the intermediate line between the long side portions 56R and 56L are formed at the center portions in the longitudinal direction of the flat plate portions 68R and 68L, respectively. Work holes 72R and 72L for using a tool such as a hole snap ring pliers are provided in the central portions of the extending portions 70R and 70L, respectively. As shown in FIGS. 3A, 3B and 4, hook portions 74R and 74L are formed at the ends of the extending portions 70R and 70L, respectively, and the pair of hook portions 74R and 74L are mutually connected. Opposite. As shown in FIGS. 3A and 3B, the edge portions of the hook portions 74 </ b> R and 74 </ b> L are formed to be straight lines parallel to the long side portions 56 </ b> R and 56 </ b> L. The hook portions 74R and 74L face each other at a predetermined interval during normal use, but can be engaged with each other as described later. Further, both long side portions 56R and 56L can be deformed like a bow with the engagement of the hook portions 74R and 74L.

  Fig.5 (a) is an expanded sectional view of a pair of hook part 74R, 74L shown in FIG. FIG. 5B shows one side viewed from an intermediate position between the pair of hook portions 74R and 74L (the right side in FIG. 5A is referred to as “the right side” hereinafter). It is a perspective view of the hook part 74R.

  The right hook portion 74R is on the other side facing the end portion of the extending portion 70R from the end portion (the left side in FIG. 5A), and the “other side” is hereinafter referred to as the “left side”. The base portion 76R is formed to protrude toward the hook portion 74L, and the claw portion 78R protrudes upward from the base portion 76R. The base portion 76R has a flat plate shape, and is formed at the end portion of the extending portion 70R so as to extend in parallel with the long side portions 56R and 56L. The base portion 76R is formed to have a thickness that is approximately half the thickness of the extending portion 70R, and is formed on the lower side in the thickness direction of the extending portion 70R. The claw portion 78R is formed to extend in parallel to the long side portions 56R and 56L on the tip of the base portion 76R, that is, on the opposite left hook portion 74L side. Therefore, a recess 80R extending in parallel with the long sides 56R, 56L is formed by the base 76R between the end of the extension 70R and the claw 78R.

  The cross-sectional shape of the claw portion 78R is substantially triangular as shown in FIGS. 5A and 5B, and the surface 88R sandwiches the surface 88R facing the hook portion 74L and the thick portion of the claw portion 78R. The back side surface, that is, the side 90R opposite to the long side portion 56R. The top part of the claw part 78R formed by the intersecting line of the surface 88R and the surface 90R is located substantially on the same plane as the upper surface of the extending part 70R.

  The left hook portion 74L includes a base portion 76L formed to protrude from the end portion toward the right hook portion 74R facing the end portion of the extending portion 70L, and a claw portion 78L protruding downward from the base portion 76L. It is configured. The base portion 76L has a flat plate shape, and is formed at the end portion of the extending portion 70L so as to extend in parallel with the long side portions 56R and 56L. The base portion 76L is formed to have a thickness that is approximately ½ of the thickness of the extending portion 70L, and is formed on the upper side in the thickness direction of the extending portion 70L. The claw portion 78L is formed on the distal end of the base portion 76L, that is, on the opposite right hook portion 74R side, extending in parallel with the long side portions 56R and 56L. Therefore, a concave portion 80L extending in parallel with the long side portions 56R and 56L is formed by the base portion 76L between the end portion of the extending portion 70L and the claw portion 78L.

  The cross-sectional shape of the claw portion 78L is substantially triangular as shown in FIGS. 5A and 5B, and the surface 88L facing the hook portion 74R and the surface 88L across the thick portion of the claw portion 78L are sandwiched. It has a back surface, that is, a surface 90L on the side facing the long side portion 56L. The top part of the claw part 78L formed by the intersecting line of the surface 88L and the surface 90L is located on substantially the same plane as the lower surface of the extending part 70L.

  Thus, the right hook portion 74R and the left hook portion 74L are formed in shapes that are opposite to each other when viewed from the axial direction of the guide rail 4. Hereinafter, regarding the claw portion 78R of the right hook portion 74R, the surface on the side facing the claw portion 78L of the left hook portion 74L is referred to as a first surface 88R, and the surface on the side facing the long side portion 56R is a second surface. The surface is 90R. Similarly, regarding the claw portion 78L of the left hook portion 74L, the surface on the side facing the claw portion 78R of the right hook portion 74R is the first surface 88L, and the surface on the side facing the long side portion 56L is the second surface. The surface 90L.

  As shown in FIGS. 4 and 5A, the second surface 90R of the right claw portion 78R is substantially perpendicular to the plane defined by the pair of long side portions 56R and 56L. Accordingly, the first surface 88R of the claw portion 78R is inclined so as to approach the left hook portion 74L from the top toward the base 76R. Similarly, in the left hook portion 74L, the second surface 90L of the left claw portion 78L is substantially perpendicular to the plane defined by the pair of long side portions 56R and 56L, and accordingly, the claw portion 78L. The first surface 88L is inclined so as to approach the right hook portion 74R from the top toward the base 76L.

  A through hole 92R that penetrates the base portion 76R in the vertical direction is formed in the concave portion 80R of the right hook portion 74R, that is, the base portion 76R. The through-hole 92R has a substantially rectangular cross section when viewed from the top and bottom, and the longitudinal direction extends in parallel to the long side portions 56R and 56L. Accordingly, the claw portion 78R and the through hole 92R are formed in parallel. The length in the longitudinal direction of the through hole 92R is formed to be slightly longer than the length in which the parallel claw portions 78R extend. Further, the dimension in the width direction of the through hole 92R is formed to be slightly larger than the dimension in the width direction of the claw portion 78R. In other words, the extending length and width dimension of the claw portion 78R are formed smaller than the longitudinal length and width dimension of the through-hole 92R, respectively. In other words, the extending length and width dimension of the left claw part 78L paired with the right claw part 78R are formed smaller than the longitudinal length and width dimension of the through-hole 92R, respectively. .

  The inner wall 94R on the left side of the through hole 92R, that is, the left claw portion 78L side, is a surface that is continuous on the same plane as the second surface 90R of the claw portion 78R. That is, the second surface 90R of the claw portion 78R and the inner wall 94R of the through hole 92R form one plane, and the plane is substantially perpendicular to the plane defined by the pair of long side portions 56R and 56L. Yes.

  A through hole 92L that penetrates the base 76L in the vertical direction is formed in the recess 80L of the left hook part 74L, that is, the base 76L. The through-hole 92L has a substantially rectangular cross section viewed from the top and bottom, and the longitudinal direction extends in parallel with the long side portions 56R and 56L. Therefore, the claw portion 78L and the through hole 92L are formed in parallel. The length in the longitudinal direction of the through hole 92L is formed to be slightly longer than the length in which the parallel claw portions 78L extend. Further, the dimension in the width direction of the through hole 92L is formed to be slightly larger than the dimension in the width direction of the claw portion 78L. In other words, the extending length and width dimension of the claw portion 78L are formed smaller than the longitudinal length and width dimension of the through-hole 92L, respectively. That is, the extending length and width dimension of the right claw part 78R paired with the left claw part 78L are formed smaller than the longitudinal length and width dimension of the through-hole 92L, respectively. .

  The inner wall 94L on the right side of the through hole 92L, that is, on the right claw 78R side, is a surface that is continuous on the same plane as the second surface 90L of the claw 78L. That is, the second surface 90L of the claw portion 78L and the inner wall 94L of the through hole 92L form one plane, and the plane is substantially perpendicular to the plane defined by the pair of long side portions 56R and 56L. Yes.

  When the hook portions 74R and 74L are engaged, as will be described later, the claw portion 78L of the left hook portion 74L is inserted into the right through hole 92R, and the right hook portion 74R is inserted into the left through hole 92L. The claw portion 78R is inserted. In the present embodiment, as described above, the extending length and the width dimension of the right claw portion 78R are formed smaller than the longitudinal length and the width dimension of the through hole 92L, respectively, The extending length and width dimension of the claw portion 78L are formed smaller than the longitudinal length and width dimension of the through hole 92R, respectively. That is, the claw portion 78R is formed in a size that can be inserted into the through hole 92L, and the claw portion 78L is formed in a size that can be inserted into the through hole 92R.

  Next, a method for loading the steel ball 7 into the slider 10 or a method for removing the steel ball 7 from the slider 10 will be described. The steel ball 7 is loaded by engaging the pair of hook portions 74R and 74L. FIG. 6 is a cross-sectional view of the pair of hook portions 74R and 74L according to the present embodiment, in which (a) shows a state where opposing surfaces of the hook portions are in contact with each other, and (b) is engaged with each other. It shows the state. FIG. 7 is a bottom view showing the shape of the frame type holder 46 in a state where the hook portions 74R and 74L are engaged with each other.

  In the state where the frame type holder 46 is assembled to the slider 10, that is, the state shown in FIG. 4, the hole snaps are inserted into the working holes 72R and 72L (see FIG. 4) of the extending portions 70R and 70L of the frame type holder 46. Insert tools such as ring pliers. Then, the tool is operated to bring the work holes 72R and 72L closer to each other. Then, the pair of hook portions 74R and 74L approach each other, and at the same time, the long side portions 56R and 56L of the frame type retainer 46 are pulled inwardly at the center, and are bent in a bow shape as shown in FIG. It is elastically deformed. When the tool is operated to bring the work holes 72R and 72L closer to each other, the deformation of the long side portions 56R and 56L increases. Then, when the first surfaces 88R and 88L facing each other of the claw portions 78R and 78L come into contact with each other, thereafter, the first surfaces 88R and 88L of the claw portions 78R and 78L slide to be different from each other. Start moving in the direction. That is, since the first surfaces 88R and 88L are inclined to each other, the first surface 88R of the right claw portion 78R moves substantially downward, and the first surface 88L of the left claw portion 78L is It moves almost upward. Then, the right extending portion 70R and the base portion 76R of the hook portion 74R are elastically deformed to warp downward as shown in FIG. Similarly, the left extending portion 70L and the base portion 76L of the hook portion 74L are elastically deformed to warp upward. At the same time, the deformation of the long side portions 56R and 56L is further increased. In the state where the top portions of the claw portions 78R and 78L are in contact with each other, the deformation amounts of the extending portions 70R and 70L and the base portions 76R and 76L are maximized.

  When the tops of the claw portions 78R and 78L cross over the tops of the other claw portions 78L and 78R, the right claw portion 78R moves toward the upper side and the left claw portion 78L moves toward the lower side. . At the same time, the extending portions 70R and 70L and the base portions 76R and 76L change so as to return to their original shapes. The right claw portion 78R is inserted into the through hole 92L of the left hook portion 74L from the lower side to the upper side. The length and width dimension of the claw portion 78R in the extending direction are formed smaller than the length and width dimension of the through hole 92L in the longitudinal direction, respectively, so that the claw part 78R is easily inserted into the through hole 92L. When the right claw portion 78R is inserted into the left through hole 92L, the second surface 90R of the claw portion 78R is hooked on the inner wall 94L on the hook portion 74R side of the through hole 92L. In other words, the second surface 90R of the claw portion 78R is hooked on one plane formed by the second surface 90L of the left claw portion 78L and the inner wall 94L of the through hole 92L.

  Similarly, the left claw portion 78L is inserted into the through hole 92R of the right hook portion 74R from the upper side to the lower side. The length and width dimension in the extending direction of the claw portion 78L are formed smaller than the length in the longitudinal direction and the dimension in the width direction of the through-hole 92R, respectively, and thus are easily inserted into the through-hole 92R. When the left claw portion 78L is inserted into the right through hole 92R, the second surface 90L of the claw portion 78L is caught by the inner wall 94R on the hook portion 74L side of the through hole 92R. In other words, the second surface 90L of the claw portion 78L is hooked on one plane formed by the second surface 90R of the right claw portion 78R and the inner wall 94R of the through hole 92R.

  Thus, as shown in FIG. 6B, the claw portions 78R and 78L are inserted into the through holes 92L and 92R of the opposing hook portions 74L and 74R, respectively. More specifically, the second surface 90R of the claw portion 78R and the second surface 90L of the claw portion 78L are respectively an inner wall 94L on the hook portion 74R side of the through hole 92L and an inner wall 94R on the hook portion 74L side of the through hole 92R. Get hooked on. The pair of hook portions 74R and 74L are engaged with each other by this catching. When the hook portions 74R and 74L are engaged with each other, the deformations of the extending portions 70R and 70L and the base portions 76R and 76L return to their original shapes.

  In a state where the hook portions 74R and 74L are engaged with each other, as shown in FIG. 6B, the entire second surface 90R of the right claw portion 78R is in contact with the inner wall 94L of the through hole 92L. I'm stuck. Similarly, the entire second surface 90L of the left claw portion 78L is in contact with and caught by the inner wall 94R of the through hole 92R. As described above, the second surfaces 90R and 90L, which are the catching surfaces of the claw portions 78R and 78L, are hooked on the inner walls 94L and 94R of the through holes 92L and 92R without waste. Furthermore, since the area where they come into contact with each other and get caught is increased compared to the prior art, the hook portions 74R and 74L are less likely to be disengaged.

  When the hook portions 74R and 74L are engaged with each other, the tool is removed from the work holes 72R and 72L. Even when the tool is pulled out from the work holes 72R and 72L, as shown in FIG. 7, the long side portions 56R and 56L of the frame type retainer 46 are maintained in a state of being elastically deformed to be bent like a bow. Since the long side portions 56R and 56L are elastically deformed by the engagement of the hook portions 74R and 74L, they attempt to return to the original shape. For this reason, a force in a direction in which the pair of hook portions 74R and 74L are separated from each other is applied. However, in the present embodiment, even when such a force is applied, the second surfaces 90R and 90L of the claw portions 78R and 78L are entirely covered with the inner walls 94L and 94R of the through holes 92L and 92R, respectively. Engagement is not easily disengaged because they are hooked and in contact with each other over a large area.

  When the hook portions 74R and 74L are engaged with each other and the long side portions 56R and 56L are deformed inwardly in a bow shape, the lower edges 64R of the ball holding grooves 60R and 60L are formed at the central portions of the long side portions 56R and 56L. The gap between 64L and the lower edges 66 and 66 of the upper rolling groove 34 formed in the legs 25a and 25b of the bearing body 19 is wider than L shown in FIG. Wider than. And since the hook parts 74R and 74L are engaged in the above state, this wide width is maintained. Therefore, the operator can easily load the steel ball 7 into the bearing 10 from the wide gap. Further, when the steel ball 7 is replaced, the steel ball 7 can be easily taken out from the bearing 10. Even during the work, the hook parts 74R and 74L are not easily disengaged, and the work of loading and unloading the steel ball 7 can be performed safely with good workability. After the work is completed, the tool is inserted into the work holes 72R and 72L and operated, and the hook portions 74R and 74L are disengaged. The actual loading or unloading operation of the steel ball 7 is performed with the bearing 10 upside down, that is, with the state shown in FIG. 4 turned upside down.

  Thus, according to the present embodiment, the ball holder 46 in which the hook portions 74R and 74L of the hook portions 74R and 74L are easily hooked and are not easily detached, and the linear guide device 1 including the ball holder 46 are provided. can do. In addition, the hook portions 74R and 74L are in contact with each other over a wide area and are engaged with each other so that the hook portions 74R and 74L are not easily disengaged. Therefore, the sizes of the claw portions 78R and 78L should be smaller than the conventional ones. Can do. That is, the lengths in the extending direction and the dimensions in the width direction of the claw portions 78R and 78L are made smaller than the claw portions of the conventional frame type cage having the same size as the frame type cage 46 according to the present embodiment. be able to.

(Second Embodiment)
Next, a second embodiment will be described. The linear guide device according to each example of the second embodiment is different from the first embodiment in the configuration of the claw portion of each hook portion of the frame type cage. Hereinafter, each example will be described focusing on the configuration different from the first embodiment. In addition, the structure similar to 1st Embodiment is demonstrated using the same code | symbol, and the overlapping description is abbreviate | omitted.

(First embodiment)
FIG. 8A is a cross-sectional view of one hook portion 174R of the pair of hook portions of the ball cage according to the first example of the second embodiment.

  Also in the present embodiment, the second surface 190R of the claw portion 178R protruding from the base portion 176R and the inner wall 94R on the other hook portion 174L (not shown) side of the through hole 92R form one plane, and the plane is It is formed substantially perpendicular to the plane defined by the pair of long side portions 56R and 56L. However, the angle formed by the first surface 188R and the second surface 190R is smaller than that of the hook portion 74R of the first embodiment. Therefore, in the present embodiment, the first surface 188R is steeper than the first surface 88R of the hook portion 74R of the first embodiment. Although illustration is omitted, the configuration of the other hook portion 174L is a configuration in which the upper and lower sides and the left and right sides of the hook portion 174R are reversed. Other configurations are the same as those of the first embodiment.

  Also in this example, as in the first embodiment, the claw portions 178R and 178L are inserted into the through holes 92L and 92R of the hook portions 174L and 174R facing each other. More specifically, the second surface 190R of the claw portion 178R and the second surface 190L of the claw portion 178L are respectively an inner wall 94L on the hook portion 174R side of the through hole 92L and an inner wall 94R on the hook portion 174L side of the through hole 92R. Get hooked on. Due to this catching, the pair of hook portions 174R and 174L are engaged with each other. The second surfaces 190R and 190L, which are the catching surfaces of the claw portions 178R and 178L, are hooked on the inner walls 94L and 94R of the through holes 92L and 92R without waste, and are in contact with each other over a wide area. The hook portions 174R and 174L are not easily disengaged.

  As described above, according to the present embodiment, the hooks 174R and 174L of the claw portions 178R and 178L are easily hooked to each other and are not easily detached, and the linear guide device 1 including the ball holder 46 is provided. Can be provided. Further, the hook portions 174R and 174L are in contact with each other over a wide area and are engaged with each other so that the hook portions 174R and 174L are not easily disengaged. Can be made smaller than the claw portions of the conventional frame type cage having the same size as the frame type cage 46 according to the present embodiment.

(Second embodiment)
FIG.8 (b) is sectional drawing of one hook part 274R among a pair of hook parts of the ball holder which concerns on 2nd Example of 2nd Embodiment.

  Also in the present embodiment, the second surface 290R of the claw portion 278R protruding from the base portion 276R and the inner wall 94R on the other hook portion 274L (not shown) side of the through hole 92R form one plane, and the plane is It is formed substantially perpendicular to the plane defined by the pair of long side portions 56R and 56L. However, the angle formed by the first surface 288R and the second surface 290R is larger than that of the hook portion 74R of the first embodiment. Therefore, in the present embodiment, the first surface 288R is inclined more gently than the first surface 88R of the hook portion 74R of the first embodiment. Although illustration is omitted, the configuration of the other hook portion 274L is a configuration in which the upper and lower sides and the left and right sides of the hook portion 274R are reversed. Other configurations are the same as those of the first embodiment.

  Also in the present example, like the first embodiment, the claw portions 278R, 278L are inserted into the through holes 92L, 92R of the hook portions 274L, 274R facing each other. More specifically, the second surface 290R of the claw portion 278R and the second surface 290L of the claw portion 278L are respectively an inner wall 94L on the hook portion 274R side of the through hole 92L and an inner wall 94R on the hook portion 274L side of the through hole 92R. Get hooked on. A pair of hook portions 274R and 274L are engaged with each other by this catching. The second surfaces 290R and 290L, which are the catching surfaces of the claws 278R and 278L, are hooked on the inner walls 94L and 94R of the through holes 92L and 92R without waste, and are in contact with each other over a wide area. The hook portions 274R and 274L are not easily disengaged.

  As described above, according to the present embodiment, the hooks 274R, 274L of the hooks 278R, 278L are easily hooked to each other and are not easily detached, and the linear guide device 1 including the ball holder 46 is provided. Can be provided. In addition, the hook portions 274R and 274L are in contact with each other over a wide area and are engaged with each other so that the hook portions 274R and 274L are not easily disengaged. Can be made smaller than the claw portions of the conventional frame type cage having the same size as the frame type cage 46 according to the present embodiment.

(Third embodiment)
FIG.8 (c) is sectional drawing of one hook part 374R among a pair of hook parts of the ball holder which concerns on 3rd Example of 2nd Embodiment.

  In the present embodiment, the cross-sectional shape of the claw portion 378R protruding from the base portion 376R is a substantially pentagon. This cross-sectional shape is formed by cross sections of the following surfaces. That is, the first surface 388R extending substantially perpendicularly to the plane defined by the pair of long side portions 56R and 56L from the end portion of the base portion 76R, and extending in parallel with the first surface 388R and penetrating therethrough. A second surface 390R that forms one plane with the inner wall 94R of the hole 92R, and a third surface 396R that extends obliquely upward from the upper sides of the first surface 388R and the second surface 390R, respectively, in a direction intersecting with each other. The fourth surface 398 </ b> R is connected to the lower sides of the first surface 388 </ b> R and the second surface 390 </ b> R and coincides with the upper surface of the base 76. Also in the present embodiment, the inner wall 94R and the second surface 390R of the through-hole 92R form one plane, and the plane is formed substantially perpendicular to the plane defined by the pair of long side portions 56R and 56L. ing. Although illustration is omitted, the configuration of the other hook portion 374L is a configuration in which the upper and lower sides and the left and right sides of the hook portion 374R are reversed. Other configurations are the same as those of the first embodiment.

  Also in the present example, as in the first embodiment, the claw portions 378R and 378L are inserted into the through holes 92L and 92R of the hook portions 374L and 374R facing each other. More specifically, the second surface 390R of the claw portion 378R and the second surface 390L of the claw portion 378L are respectively an inner wall 94L on the hook portion 374R side of the through hole 92L and an inner wall 94R on the hook portion 374L side of the through hole 92R. Get hooked on. The pair of hook portions 374R and 374L are engaged with each other by these catches. The second surfaces 390R and 390L, which are the catching surfaces of the claw portions 378R and 378L, are hooked on the inner walls 94L and 94R of the through holes 92L and 92R without waste, and are in contact with each other over a wide area. The hook portions 374R and 374L are not easily disengaged.

  As described above, according to the present embodiment, the hooks 374R and 374L of the claw portions 378R and 378L are easily hooked to each other and are not easily detached, and the linear guide device 1 including the ball holder 46 is provided. Can be provided. In addition, the hook portions 374R and 374L are in contact with each other over a wide area and are engaged with each other so that the hook portions 374R and 374L are not easily disengaged. Can be made smaller than the claw portions of the conventional frame type cage having the same size as the frame type cage 46 according to the present embodiment.

(Fourth embodiment)
FIG. 8D is a cross-sectional view of one hook portion 474R of the pair of hook portions of the ball cage according to the fourth example of the second embodiment.

  In the present embodiment, the cross-sectional shape of the claw portion 478R protruding from the base portion 476R is substantially rectangular. This cross-sectional shape is formed by cross sections of the following surfaces. That is, the first surface 488R extending substantially perpendicularly to the plane defined by the pair of long side portions 56R and 56L from the end portion of the base portion 76, and extending in parallel with the first surface, the through hole A second surface 490R that forms one plane with the inner wall 94R of 92R, a third surface 496R that connects the upper sides of the first surface 488R and the second surface 490R, and the first surface 488R and the second surface It is a surface that connects the lower sides of 490R and coincides with the upper surface of the base portion 76. Also in the present embodiment, the inner wall 94R and the second surface 490R of the through hole 92R form one plane, and the plane is formed substantially perpendicular to the plane defined by the pair of long side portions 56R and 56L. ing. Although illustration is omitted, the configuration of the other hook portion 474L is a configuration in which the upper and lower sides and the left and right sides of the hook portion 474R are reversed. Other configurations are the same as those of the first embodiment.

  Also in this example, as in the first embodiment, the claw portions 478R and 478L are inserted into the through holes 92L and 92R of the hook portions 474L and 474R facing each other. More specifically, the second surface 490R of the claw portion 478R and the second surface 490L of the claw portion 478L are respectively an inner wall 94L on the hook portion 474R side of the through hole 92L and an inner wall 94R on the hook portion 474L side of the through hole 92R. Get hooked on. The pair of hook portions 474R and 474L are engaged with each other by these catches. The second surfaces 490R and 490L that are the catching surfaces of the claw portions 478R and 478L are hooked on the inner walls 94L and 94R of the through holes 92L and 92R without waste, and are in contact with each other over a wide area. The hook portions 474R and 474L are not easily disengaged.

  As described above, according to the present embodiment, the hooks 474R and 474L of the hooks 478R and 478L are easily hooked to each other and are not easily detached, and the linear guide device 1 including the ball holder 46 is provided. Can be provided. Further, the hook portions 474R and 474L are in contact with each other over a wide area and are engaged with each other so that the hook portions 474R and 474L are not easily disengaged. Therefore, the lengths in the extending direction and the dimensions in the width direction of the claw portions 478R and 478L. Can be made smaller than the claw portions of the conventional frame type cage having the same size as the frame type cage 46 according to the present embodiment.

(Third embodiment)
Next, a third embodiment will be described. The linear guide device according to each example of the third embodiment is different from the first embodiment in the shape of the through hole of each hook portion of the frame type cage. Hereinafter, each example will be described focusing on the configuration different from the first embodiment. In addition, the structure similar to 1st Embodiment is demonstrated using the same code | symbol, and the overlapping description is abbreviate | omitted.

(First embodiment)
FIG. 9A is a bottom view of the main part of the ball cage according to the first example of the third embodiment. In other words, the main part of the ball cage 46 assembled to the slider 10 is viewed from below.

  As shown in FIG. 9A, the through holes 592R and 592L formed in the hook portions 574R and 574L of the cage according to the present embodiment have a shape as viewed from below and have a pair of parallel lines in the longitudinal direction. It has a substantially oval shape. The longitudinal directions of 592R and 592L of each through hole are parallel to the pair of long side portions 56R and 56L, respectively. Other configurations are the same as those of the first embodiment.

  Even if the through holes 592R and 592L have such a shape, the claw portions 78R and 78L are inserted into the through holes 592L and 592R of the hook portions 574L and 574R, respectively, and the same effects as in the first embodiment are exhibited. Therefore, according to the present embodiment, there are provided the ball holder 46 in which the hook portions 574R and 574L of the hook portions 574R and 574L are easily hooked and are not easily detached, and the linear guide device 1 including the ball holder 46. be able to.

(Second embodiment)
FIG. 9B is a bottom view of the main part of the ball cage according to the second example of the third embodiment. In other words, the main part of the ball cage 46 assembled to the slider 10 is viewed from below.

  As shown in FIG. 9B, the through holes 692R and 692L formed in the hook portions 674R and 674L of the cage according to the present embodiment are formed in a substantially trapezoidal shape when viewed from below. The length of the short side of the substantially trapezoidal shape corresponds to the length of extension of the claw portions 78R and 78L, respectively. Other configurations are the same as those of the first embodiment.

  Even if the through holes 692R and 692L have such a shape, the claw portions 78R and 78L are inserted into the through holes 692L and 692R of the hook portions 674L and 674R, respectively, and the same effects as in the first embodiment are exhibited. Therefore, according to the present embodiment, there are provided the ball cage 46 in which the hook portions 674R and 674L of the hook portions 674R and 674L are easily hooked and are not easily detached, and the linear guide device 1 including the ball cage 46. be able to.

(Third embodiment)
FIG. 9C is a bottom view of the main part of the ball cage according to the third example of the third embodiment. In other words, the main part of the ball cage 46 assembled to the slider 10 is viewed from below.

  The through holes 792R and 792L formed in the hook portions 774R and 774L of the cage according to the present embodiment include a pair of long sides whose shapes viewed from below are parallel as shown in FIG. 9C. It is formed in a substantially hexagonal shape. The length of a pair of long sides having a substantially hexagonal shape corresponds to the length of extension of the claw portions 78R and 78L. Other configurations are the same as those of the first embodiment.

  Even if the through holes 792R and 792L have such a shape, the claw portions 78R and 78L are inserted into the through holes 792L and 792R of the hook portions 774L and 774R, respectively, and the same effects as in the first embodiment are exhibited. Therefore, according to the present embodiment, the ball cage 46 in which the hook portions 774R and 774L of the hook portions 774R and 774L are easily hooked to each other and are not easily detached, and the linear guide device 1 including the ball cage 46 are provided. be able to.

(Fourth embodiment)
FIG. 9D is a bottom view of the main part of the ball cage according to the fourth example of the third embodiment. In other words, the main part of the ball cage 46 assembled to the slider 10 is viewed from below. FIG. 9E is a cross-sectional view of one hook portion 874R of the ball cage according to the fourth example of the third embodiment.

  As shown in FIG. 9D, the through holes 892R and 892L formed in the hook portions 874R and 874L of the cage according to the present embodiment have a substantially rectangular shape as viewed from below, as in the first embodiment. However, some inner walls are inclined with respect to the plane defined by the pair of long side portions 56R and 56L. As shown in FIG. 9E, of the inner walls of the through-hole 892R, the inner wall 895R on the long side portion 56R side has an inclination so as to approach the hook portion 874L on the other side as it goes downward from above. . Similarly, in the inner wall of the through-hole 892L, the inner wall 895L (not shown) on the long side portion 56L side is inclined so as to approach the hook portion 874R as it goes from below to above. Other configurations are the same as those of the first embodiment.

  Even if the through holes 892R and 892L have such a shape, the claw portions 78R and 78L are inserted into the through holes 892L and 892R of the hook portions 874L and 874R, respectively, and the same effects as those of the first embodiment are exhibited. Therefore, according to the present embodiment, there are provided the ball holder 46 in which the hook portions 874R and 874L of the hook portions 874R and 874L are easily hooked to each other and are not easily detached, and the linear guide device 1 including the ball holder 46. be able to.

  Although the description of each embodiment and example of the present invention is finished as above, the present invention is not limited to the above-described embodiment and example. The form of the claw portion and the through hole can be appropriately modified. For example, in each of the embodiments and examples, the hook surface of each claw portion is configured to be hooked to the inner wall of the through hole of the opposing hook portion, but the hook surfaces of each claw portion are also partially hooked. Also good. Moreover, it is good also as a hook part which each combined the shape of the nail | claw part which concerns on each Example of 2 embodiment, and the shape of the through-hole which concerns on each Example of 3rd Embodiment.

  Note that the surfaces of the claws facing each other are engaged with each other when they have a predetermined inclination, as in the first to third examples of the first and second embodiments. Cheap. That is, in the first and second examples of the first embodiment and the second embodiment, if the angle formed by the second surface and the first surface has an inclination of 30 ° or more, they are engaged with each other. Easy to make. In the third example of the second embodiment, if the angle formed by the extended surface of the second surface and the extended surface of the third surface has an inclination of 30 ° or more, they can be easily engaged with each other. . Further, as in the fourth example of the second embodiment, the angle formed by the second surface and the third surface may be 90 °. However, in the fourth example of the second embodiment, if the angle formed by the second surface and the third surface is larger than 90 °, it becomes difficult to engage with each other.

DESCRIPTION OF SYMBOLS 1 Linear motion guide apparatus 4 Guide rail 7 Steel ball 10 Slider 13 Recess 16, 17 Rolling groove 19 (of guide rail) Bearing main-body part 22a, 22b End cap 25a, 25b Leg part 28 (Bearing) Body part 31a, 31b Side seals 34, 35 Rolling groove 37 (bearing) Rolling path 40, 41 Straight path 43 Circulating path 46 Ball cage, frame type retainer 48 Locking portion 50 Recess 52 Rod type ball cage 56R, 56L Long side Parts 58a, 58b Short side portions 60R, 60L Ball holding groove 62 Upper edge of ball holding groove 64 Lower edge 66 of ball holding groove Lower edge 68R, 68L of upper holding groove Flat plate portion 70R, 70L Extension portions 72R, 72L Working holes 74R, 74L Hooks 76R, 76L Bases 78R, 78L Claws 80R, 80L Recesses 88R, 88L First surface 0R, 90L second surface 92R, 92L through holes 94R, 94L inner wall 396R, 496R third surface 398R fourth surface

Claims (10)

A guide rail,
A slider disposed on the guide rail so as to be movable in the axial direction of the guide rail via a plurality of balls;
Used in a linear guide device in which a plurality of rolling grooves in which the plurality of balls roll are formed on a surface of the slider facing the guide rail,
It has a frame shape having a pair of opposed long sides, each of the pair of long sides is formed with a ball holding groove facing the rolling groove, and each of the long sides is opposed A hook portion protruding toward the long side portion is provided, and each hook portion is formed with a claw portion that can be hooked on the other hook portion, and the hook portions are spaced between the claw portions. From the state of facing each other with the gap therebetween, the respective claw portions can be engaged with each other with the other hook portion, and in the engaged state, the pair of long side portions In the ball cage that is deformed and holds the deformed state,
Each hook part is provided with a hole, and each claw part is formed in a size that can be inserted into the hole provided in the other hook part. Is held in the hole provided in the other hook part, and is hooked on the other hook part by being inserted into the hole.   The hole provided in each hook portion has a flat inner wall on the other hook portion side, the flat surface, and a surface hooked on the other hook portion of the claw portion formed in each hook portion. The ball holder according to claim 1, wherein the ball holder has one plane.   3. The ball holding according to claim 2, wherein in the engaged state, a surface of the claw portion that is hooked to the other hook portion is substantially entirely in contact with the inner wall of the other hole. vessel.   Each said nail | claw part has the surface on the side facing the said other nail | claw part inclined with respect to the plane which the said pair of long side part makes | forms. Ball retainer as described in.   4. The ball cage according to claim 1, wherein each of the claw portions has a plane parallel to a plane formed by the pair of long side portions. 5.   The ball holder according to any one of claims 1 to 5, wherein the hole formed in each hook portion has a substantially rectangular cross section.   The ball holder according to any one of claims 1 to 5, wherein the hole formed in each hook part has a substantially oval cross section having a pair of parallel lines.   The ball holder according to any one of claims 1 to 5, wherein the hole formed in each hook portion has a substantially trapezoidal cross section.   The ball holder according to any one of claims 1 to 5, wherein the hole formed in each hook portion has a substantially hexagonal cross section. A linear guide device comprising the ball holder according to any one of claims 1 to 9.

Images