JP5716692B2 - Manufacturing method of linear guide device, jig used in manufacturing method of linear guide device - Google Patents

Description

  The present invention relates to a linear guide device provided with a ball cage. Furthermore, it is related with the manufacturing method of a linear guide apparatus, and the jig used for the said manufacturing method.

  2. Description of the Related Art Conventionally, a linear guide device is known as a linear motion guide device that supports an object that moves linearly in a transfer device, a semiconductor manufacturing device, or the like with low friction. Examples of the linear guide device include the following. In other words, it consists of a guide rail and a bearing that is loosely fitted so as to be able to move relative to the longitudinal direction of the guide rail across the guide rail. The bearing ends at both ends of the bearing body and the leading or trailing end when the bearing moves. Caps and a large number of balls that circulate in the bearings and roll on the rolling path between the guide rails and the bearings to achieve smooth relative movement between the guide rails and the bearings It is.

  In the ball cage used in such a linear guide device, it has a rectangular frame shape along the axial direction of the linear guide device, and is always inside the middle position of the long side portion where the ball holding groove is formed. The end caps are provided with engaging hook portions that are opposed to each other with a distance therebetween, draw the long side portions on both sides in a bow shape, engage in a bent state, and maintain and release the state. There is a ball holder that allows the ball of the bearing to be easily attached and detached without removing the ball holder (see Patent Document 1).

Japanese Utility Model Publication No. 6-19855

  However, the ball cage having such a configuration has a problem that the holding force of the engaging hook portion is weak, and the hook is detached due to the collision of the hand of the worker, the work tool, the ball, etc. during the ball assembling work. . In addition, when the deformed state is released at an unexpected timing, there is a risk that the ball may be blown off and the worker may be injured.

  In view of such problems, the present invention can reliably hold the deformed state, and can easily and safely incorporate the ball without unexpectedly releasing the deformed state during the ball assembling operation, improving work efficiency. An object of the present invention is to provide a linear guide device, a manufacturing method of the linear guide device, and a jig used in the manufacturing method of the linear guide device.

In order to solve the above-described problems, a method for manufacturing a linear guide device according to the present invention is to manufacture a linear guide device that includes a linear guide rail and a bearing that is movably supported on the guide rail. A bearing body comprising a body portion to be disposed on the guide rail and a pair of leg portions extending from the body portion so as to extend along both side surfaces of the guide rail; A frame-shaped ball holder having a pair of ball holding portions disposed in a predetermined space surrounded by the leg portions and the trunk portion and having a flat plate-like extension portion extending along the pair of leg portions; Of the first and second members that can move relative to each other in the linear direction with the leg portion facing upward, the extending direction of the leg portion is the first member on the first member. And placed so as to be orthogonal to the relative movement direction of the second member The tension generating member provided on the second member is locked in the hole formed in the extending portion on the front side in the relative movement direction of the first and second members, and the first member and the wherein the assembling an embedded bearing balls by deforming the ball holding section by tension generated by the second member is tensioned the tensioning member by a predetermined amount relative movement in the body-retainer assembly.

  Further, a jig used in the method for manufacturing a linear guide device according to the present invention is a jig for carrying out the method for manufacturing the linear guide device, and the main body / retainer assembly is mounted with the legs up. A first member for placing and fixing; a second member that slidably supports the first member in a direction perpendicular to the longitudinal direction of the guide rail; and the extending portion provided on the second member. And a tension generating member engageable with the hole.

  Preferably, in the jig used in the method of manufacturing a linear guide device according to the present invention, the first member is for mounting and fixing the main body / retainer assembly on the upper surface side with the leg portion up. It is an upper plate member provided with a bearing holding portion, and the second member is a lower plate member that supports the first member so as to be relatively movable in a linear direction on an upper surface, and the second member includes the first plate member. A pair of guide portions for guiding the relative movement of the members is provided on both sides of the first member, and the tension generating member has end portions fixed on both sides of the guide portion, and a central portion of the extension portion. It is a linear member that can be locked in the hole, and the linear member is tensioned when the first member is in the first position of the guide portion with the central portion locked in the hole. When the second position is not generated, tension is generated and the tension is generated. In the that state, characterized in that the deformed state of the ball holding portion on the side of the linear member are engaged.

  Preferably, in the jig used in the method for manufacturing the linear guide device according to the present invention, the first member is stationary with respect to the second member in order to hold the deformed state of the ball holding portion. A stopper mechanism is provided.

  Preferably, in the jig used in the method for manufacturing a linear guide device according to the present invention, the stopper mechanism is provided in a through-hole penetrating the first member in the vertical direction and the second member, and the first member A hole facing the through-hole when the member is in the second position, and a rod-shaped member inserted simultaneously into the through-hole and the hole in a state where the through-hole and the hole are opposed to each other It is characterized by becoming.

  Preferably, in the jig used in the method for manufacturing a linear guide device according to the present invention, the guide portion is a dovetail groove provided on the upper surface side of the second member, and the stopper mechanism is formed of the first member. A recess formed in a surface facing the side wall of the dovetail groove, a rolling element provided in the second member and engaged with the recess when the first member is in the second position, and the rolling element And a rolling element plunger comprising an elastic member for urging the concave portion to the concave portion.

  ADVANTAGE OF THE INVENTION According to this invention, a linear guide apparatus which can hold | maintain a deformation | transformation state reliably, can perform a ball | bowl installation work easily and safely, without releasing a deformation | transformation state unexpectedly at the time of a ball | bowl installation work, and a work efficiency improves The jig used for the manufacturing method of a guide apparatus and the manufacturing method of a linear guide apparatus can be provided.

It is a partially cutaway perspective view showing the linear guide device according to the first embodiment of the present application. It is a side view of the side surface perpendicular | vertical to the axial direction of the linear guide apparatus which concerns on 1st Embodiment of this application. It is a partially cutaway side view of the side surface parallel to the axial direction of the linear guide device according to the first embodiment of the present application. It is a top view of the ball holder used for the linear guide device concerning a 1st embodiment of this application. It is sectional drawing of the ball holder used for the linear guide apparatus which concerns on 1st Embodiment of this application. The state before the operation | work of the assembly jig used for the ball | bowl incorporation operation | work of the linear guide apparatus which concerns on 1st Embodiment of this application is shown. (A) is a top view. (B) is sectional drawing of the XX line of (a). (C) is sectional drawing of the YY line of (a). (D) is an enlarged view of a hook. The ball assembly possible state of the assembly jig used for the ball incorporation operation of the linear guide device according to the first embodiment of the present application is shown. (A) is a top view. (B) is sectional drawing of the XX line of (a). (C) is sectional drawing of the YY line of (a). The state before the operation | work of the assembly jig used for the ball | bowl incorporation operation | work of the linear guide apparatus which concerns on 2nd Embodiment of this application is shown. (A) is a top view. (B) is sectional drawing of the XX line of (a). (C) is sectional drawing of the YY line of (a). The ball assembly possible state of the assembly jig used for the ball assembly operation | work of the linear guide apparatus which concerns on 2nd Embodiment of this application is shown. (A) is a top view. (B) is sectional drawing of the XX line of (a). (C) is sectional drawing of the YY line of (a).

(First embodiment)
First, a linear guide device according to a first embodiment of the present application will be described with reference to FIGS. 1 to 5. FIG. 1 is a partially cutaway perspective view showing a linear guide device 1 according to a first embodiment of the present application.

  The linear guide device 1 is composed of a linear guide rail 2 and a bearing 3 that is loosely fitted across the guide rail 2 so as to be relatively movable in the longitudinal direction of the guide rail 2. The guide rail 2 is made of metal and has a long and narrow rectangular column shape. The guide rail 2 has a guide rail mounting hole 4 that passes vertically through the fixing member, and has a substantially arc-shaped cross section for rolling the ball 5. Two moving grooves 6 are provided on both side surfaces. The guide rail 2 is formed so that the side surface on one side and the side surface on the other side are symmetrical. An escape groove 7 is formed inside the rolling groove 6 provided on the lower side. The bearing 3 includes a metal bearing body 8, resin end caps 9 a and 9 b that are detachably fixed to both ends of the head or tail when the bearing 3 is moved, and a resin screwed to the outside thereof. The side seals 10a and 10b are made of, and the grease nipple 11 is screwed into a female thread portion penetrating from the side seal 10a to the end cap 9a. The bearing body 8 is formed of a body portion 12 and leg portions 13a and 13b extending downward from the lower surface so as to straddle the guide rail 2. A total of four rolling grooves (not shown) each facing two rolling grooves 6 formed on the guide rail 2 are formed on the surfaces of the leg portions 13a and 13b facing the guide rail 2. The rolling path 14 along which the ball 5 rolls together with the rolling groove 6 of the guide rail 2 is configured. Both ends of the rolling path 14 are parallel to the guide rail 2 formed inside the bearing body 8 by arcuate curved paths 15a and 15b (not shown) formed inside the end caps 9a and 9b, respectively. The linear circulation path 16 is connected to each other, and an annular path 17 is formed as a whole. A total of four annular paths 17 are provided on each side of the guide rail 2, two on the upper and lower sides. A large number of balls 5 are accommodated in the annular path 17 in a rollable manner. The upper rolling path 14 that forms the annular path 17 is provided with a frame type cage 21 that prevents the balls 5 from dropping off, and the lower rolling path 14 is a bar type cage that prevents the balls from falling off. 18 is provided. The end of the rod-shaped cage 18 is supported by the end caps 9 a and 9 b, and the other part is accommodated in the escape groove 7 formed in the guide rail 2. A lubricant supply path 19 is formed in the end cap 9a from the grease nipple 11 to the curved path 15 in the end cap 9a. A seal lip 20 having a shape corresponding to the cross-sectional shape of the guide rail 2 is formed on the side seals 10a and 10b.

  Of the many balls 5 accommodated in the annular path 17, the ball 5 positioned on the rolling path 14 on the guide rail 2 side supports the bearing 3 on the guide rail 2, and the guide rail 2 and the bearing 3 move relative to each other. In this case, the guide rail 2 and the bearing 3 are smoothly moved relative to each other. These balls 5 eventually enter into the end caps 9a and 9b, and when they are pushed by the subsequent balls 5, they are reversed by the curved path 15 inside the end caps 9a and 9b and pass through the circulation path 16 inside the bearing body 8. The end caps 9a and 9b on the opposite side enter the end caps 9a and 9b, and are reversed again by the curved path 15 inside the end caps 9a and 9b to return to the rolling path 14 on the guide rail 2 side.

  FIG. 2 is a side view showing a side surface perpendicular to the axial direction of the guide rail 2 of the linear guide device 1, and shows a state in which an end cap 9a (not shown) and a side seal 10a are attached on the left side in the drawing. The state which removed the end cap 9a and the side seal 10a on the right side toward drawing is shown. As shown on the right side of the drawing, the frame type cage 21 is disposed between the body 12 of the bearing body 8 and the guide rail 2, but as shown on the left side of the drawing, the end cap 9a and the side seal 10a Appearance does not appear when attached. By providing the frame type cage 21, the ball 5 disposed in the upper rolling path 14 does not easily fall off even when the guide rail 2 is pulled out from the bearing 3. The frame type cage 21 is provided with engaging portions 22a and 22b at both ends in the longitudinal direction, and the engaging portions 22a and 22b are engaged with concave portions 23a and 23b formed in the end cap.

  FIG. 3 is a side view showing a side surface parallel to the axial direction that is the longitudinal direction of the guide rail 2 of the linear guide device 1, and is partially cut away to show the arrangement of the frame-type cage 21 and the end caps 9a and 9b. The state of engagement is shown by a sectional view. The frame type cage 21 is disposed in a space between the smooth lower surface of the trunk portion 12 and the upper surface of the guide rail 2, and extends along the axial direction of the guide rail 2. An engaging portion 22a and an engaging portion 22b are formed at both ends in the longitudinal direction of the frame retainer 21, and the engaging portion 22a engages with a recess 23a formed in the end cap 9a. The joining portion 22b is engaged with a recess 23b formed in the end cap 9b. Thereby, the frame type holder 21 is supported by the end caps 9a and 9b. The frame type retainer 21 is attached to the bearing body 8 after the end cap 9a or 9b is attached to the bearing body 8, and the corresponding engaging portion 22a or 23b or 23b of the attached end cap 9a or 9b is attached. This can be done by inserting 22b and then attaching the other end cap 9a or 9b. Alternatively, the frame type cage 21 can be attached to the bearing body 8 by placing the frame type cage 21 at the mounting position, and then aligning the recesses 23a and 23b with the engaging portions 22a and 22b and attaching the end caps 9a and 9b. It can be done by mounting at the same time.

  FIG. 4 shows a plan view of a surface of the frame type cage 21 facing the body 12 on the bearing body 8 side. The frame type cage 21 is made of synthetic resin, and is formed in a rectangular frame shape by rod-like long side portions 25a and 25b and short side portions 26a and 26b. The long side portions 25a and 25b are formed with holding surfaces 27a and 27b having a substantially arc-shaped cross section for holding the ball 5, respectively. Flat plate portions 28a and 28b extending inward along the long side portions 25a and 25b are formed inside the long side portions 25a and 25b, respectively. Extending portions 24a and 24b extending inward and near the middle of the long side portions 25a and 25b are formed. Deformed tool holes 29a and 29b are formed on the base sides of the extending portions 24a and 24b, respectively. Engagement portions 22a and 22b that engage with recesses 23a and 23b formed in the end caps 9a and 9b protrude from the short sides 26a and 26b. In the present invention, the frame type cage 21 can be formed of an elastomer, rubber or the like.

  FIG. 5 shows an AA cross section of the frame type cage 21 shown in FIG. 4, and the ball 5 held by the frame type cage 21 on the bearing body 8 is indicated by a one-dot chain line. The extending portions 24a and 24b are arranged to face each other. The holding surfaces 27a and 27b that hold the ball 5 have an arc shape.

  Next, a jig used for assembling the linear guide device 1, specifically, assembling the ball 5 into the bearing assembly serving as the bearing 3 will be described. Here, the bearing assembly refers to a bearing in an initial state, specifically, a bearing body 8 to which a frame type cage 21 is assembled, and a state in which the ball 5 is not incorporated.

  FIG. 6 shows a state before the assembly jig 50 used for the ball assembly operation of the linear guide device 1, (a) is a top view, (b) is a cross-sectional view taken along line XX of (a), (C) is sectional drawing of the YY line of (a). In FIG. 6A, the upper side is the front side of the assembly jig 50, and the lower side is the rear side of the assembly jig 50. In FIG. 6A, the left-right direction is the width direction of the assembly jig 50.

  The assembly jig 50 is an upper base plate 51 in which a bearing holding hole 53 into which the bearing assembly 3a is fitted is arranged on the upper surface, a guide track for allowing the upper base plate 51 to slide forward and backward, and a groove 57 is on the upper surface side. The lower base plate 56 is formed. The bearing holding hole 53 is formed in a rectangular shape that is long in the width direction of the assembly jig 50. The bearing assembly 3 a is fitted in the bearing holding hole 53 in a direction in which the leg portions 13 a and 13 b extend in the width direction of the assembly jig 50 with the frame type cage 21 facing upward. Therefore, when the bearing assembly 3 a is fitted into the bearing holding hole 53, the long side portions 25 a and 25 b of the frame type cage 21 are arranged side by side in the front-rear direction of the assembly jig 50. The upper base plate 51 moves along the dovetail groove 57 in a direction perpendicular to the longitudinal direction of the long side portions 25a and 25b.

  The cross section of the upper base plate 51 has a trapezoidal shape that engages with the dovetail groove 57 as shown in FIG. The dovetail groove 57 is formed so as to extend from the rear end portion of the lower base plate 56 to the vicinity of the front end portion, and the width dimension thereof is about 2/3 of the width dimension of the lower base plate 56. Therefore, the upper surface of the lower base plate 56 has a substantially inverted U shape with the rear side opened. The upper base plate 51 has a thickness dimension equivalent to the depth dimension of the groove 57. Therefore, the upper surface of the lower base plate 56 and the upper surface of the upper base plate 51 are on substantially the same plane. When the upper base plate 51 moves to the foremost side, the upper base plate 51 has a front end portion and comes into contact with the front inner wall surface of the groove 57. At this time, the rear end portion of the upper base plate 51 does not protrude rearward from the rear end portion of the lower base plate 56. Further, the upper base plate 51 may be removed from the dovetail groove 57 when it is moved rearward, or may be stopped at a predetermined position so as not to come out of the dovetail groove 57. In the present embodiment, about half of the rear side of the upper base plate 51 stops in a state of protruding rearward from the rear end portion of the lower base plate 56.

  A pair of columnar stands 33 a and 33 b are arranged on both sides of the dovetail groove 57 on the rear side of the upper surface of the lower base plate 56. Both ends of a string-like wire 32 are fixed to the stands 33a and 33b. The wire 32 is stretched substantially linearly in the width direction of the assembly jig 50. A key-shaped hook 31 is disposed at a substantially intermediate portion of the wire 32, and a tip end portion 31 a thereof has a size to be inserted into the deformation tool holes 29 a and 29 b of the frame-type cage 21. FIG. 6D is an enlarged view of the hook 31.

Next, a procedure for incorporating the ball 5 into the bearing assembly 3a will be described.
The frame type holder 21 is attached, and the bearing assembly 3 a in a state where the ball 5 is not contained is fitted into the bearing holding hole 53 of the upper base plate 51. At this time, the upper base plate 51 is moved to the rear side of the dovetail groove 57. Moreover, the bearing assembly 3a is arrange | positioned at the bearing holding hole 53 so that the frame type holder | retainer 21 may become an upper side as mentioned above. The wire 32 is stretched in the width direction of the assembly jig 50 at a position between the leg portions 13a and 13b. In this state, the frame retainer 21 is located slightly below the wire 32.

  The upper base plate 51 is moved along the groove 57 so that the long side portion 25a on the front side of the frame type cage 21 and the wire 32 are substantially overlapped in the vertical direction, and is arranged at a substantially middle portion of the wire 32. The tip 31a of the hook 31 is inserted into the deforming tool hole 29a on the front side in the moving direction formed in the frame type holder 21 of the bearing assembly 3a. Here, in FIG. 6, the length of the wire 32 is drawn so that there is no allowance, but in practice, the wire 32 is easier to handle if there is an appropriate allowance length. That is, in this state, the wire 32 is not tensed, and no tension, that is, tension force is generated. When the upper base plate 51 starts to move forward with respect to the lower base plate 56 along the dovetail groove 57 (in the direction indicated by the arrow as “movement direction” in FIG. 6A), the wire 32 is centered. The part is pulled forward, the margin length gradually disappears, the wire 32 is tensioned, and tension is generated. That is, a tension force is generated on the wire 32. At the same time, the long side portion 25a on the side where the tool hole 29a of the frame type cage 21 is arranged begins to elastically deform in a bow shape toward the inside, that is, the long side portion 25b facing the rear side of the assembly jig 50. That is, the tension force of the wire 32 is generated by the resistance force against the elastic deformation of the long side portion 25a. When the upper base plate 51 is further moved forward, the upper base plate 51 stops at a position where the end portion on the front side in the moving direction is in contact with the front inner wall surface of the dovetail groove 57 of the lower base plate 56. At this time, the upper base plate 51 is fixed by a stopper mechanism described later. In that case, it becomes possible to incorporate the ball 5 safely in the gap portion for the ball formed by the deformation of the long side portion 25a of the frame type cage 21.

  In order to incorporate the ball 5 safely, it is necessary for the upper base plate 51 to be stationary with respect to the lower base plate 56 and to keep the deformation of the long side portion 25a. FIG. 7 shows a working state in which a ball can be incorporated in the linear guide device. Here, the wire 32 and the hook 31 are sufficiently flat with respect to the bearing assembly 3a and are compact so that the ball assembling work is not hindered. When the upper base plate 51 is released after the ball 5 has been assembled and the upper base plate 51 is moved to the initial position, the elastic force of the long side portion 25a is reduced at the same time as the tightening force of the wire 32 is reduced. At the same time, the gap for the ball becomes small, and the ball 5 cannot come out of the rolling groove 6. Thus, the upper base plate 51 is in a state in which the wire 32 is tensioned to generate tension, that is, a state in which a tension force is generated, and a state in which tension is not generated, that is, a state in which no tension force is generated. And can be switched. Next, the bearing assembly 3a is reversed in the front-rear direction, and the ball is assembled into the other rolling groove 6. When the balls 5 are assembled in both the rolling grooves 6, the operation of assembling the balls into the bearing assembly 3a is completed.

  Next, a method for fixing the upper base plate 51 and the lower base plate 56 will be described. As shown in FIG. 7C, the upper hole 54 formed so as to penetrate the upper base plate 51 in the vertical direction and the lower hole 58 formed so as to extend in the vertical direction in the lower base plate 56 The front ends of the plates 51 in the moving direction are arranged so as to communicate with each other when they contact the lower base plate 56. In the state where the upper hole 54 and the lower hole 58 are communicated in this way, as shown in FIGS. 7A and 7B, the upper hole 54 and the lower hole 58 are simultaneously stepped from above the upper base plate 51. Thus, the upper base plate 51 and the lower base plate 56 cannot be moved relative to each other, and the position of the upper base plate 51 is fixed with respect to the lower base plate 56. That is, the upper hole 54, the lower hole 58, and the fixing pin 60 constitute a stopper mechanism for the upper base plate 51. The fixing is released by removing the fixing pin 60 from the upper hole 54 and the lower hole 58.

  As described above, according to the first embodiment of the present invention, the deformed state of the long side portion can be reliably maintained, and the ball can be assembled easily and safely without unexpectedly releasing the deformed state during the ball assembling work. The linear guide device, the method for manufacturing the linear guide device, and the jig used in the manufacturing method can be operated, work efficiency is improved, and the shape of the cage is simple and lightweight, and the cost of resin molding is low Can be provided.

(Second Embodiment)
Next, a second embodiment will be described.

  The linear guide device 1 and the frame type holder 21 according to the second embodiment have the same configuration as that of the first embodiment. In 2nd Embodiment, the structure of the assembly jig used when integrating a ball | bowl in the frame-type holder | retainer 21 differs from 1st Embodiment. Hereinafter, in the description of the second embodiment, the same configuration as that of the first embodiment will be described with reference to FIGS. 1 to 7 used in the description of the first embodiment and the same reference numerals as those of the first embodiment.

  FIGS. 8A and 8B show a state before the assembly jig 150 used for ball assembly work of the linear guide device according to the second embodiment, wherein FIG. 8A is a top view, and FIG. 8B is an XX line of FIG. (C) is sectional drawing of the YY line of (a). In FIG. 8A, the upper side is the front side of the assembly jig 150 and the lower side is the rear side of the assembly jig 150. Further, in FIG. 8A, the left-right direction is the width direction of the assembly jig 150.

  The assembly jig 150 according to the second embodiment is substantially the same as that of the first embodiment, but the configuration of a stopper mechanism that fixes the upper base plate 51 to the lower base plate 56 is different. Hereinafter, the configuration of the stopper mechanism will be described, and the description of the same configuration as in the first embodiment will be omitted.

  The upper base plate 51 of the assembly jig 150 according to the second embodiment has a recess 62a formed on one side surface and a recess 62b formed on the other side surface. Further, a lateral hole 64a extending in the width direction is provided in one wall of the dovetail groove 57 of the lower base plate 56, and a lateral hole 64b extending in the width direction is also provided in the other wall. Yes. The horizontal hole 64a is provided with a rolling element plunger 66a, and the horizontal hole 64b is provided with a rolling element plunger 66b. Each of the rolling element plungers 66a and 66b includes rolling elements 68a and 68b disposed on the dovetail groove 57 side, and spring members 70a and 70b that urge each of the rolling elements 68a and 68b in the direction of the dovetail groove 57. Yes. The rolling elements 68a and 68b may be balls or rollers. Each of the rolling elements 68a and 68b is positioned on the inner side of the dovetail groove 57 rather than the side wall of the dovetail groove 57 when the spring members 70a and 70b are in the natural length state. In other words, the spring members 70a and 70b have such a length that the respective rolling elements 68a and 68b are located on the inner side of the groove 57 from the side wall of the groove 57 in the natural length state. . The rolling element plungers 66 a and 66 b move along the groove 57 with the upper base plate 51, and each rolling element plunger 66 a, 66 b comes into contact with the front inner wall surface of the groove 57 with the front end of the upper base plate 51. The moving bodies 68a and 68b are disposed so as to fall into the recesses 62a and 62b of the upper base plate 51 and engage with the recesses 62a and 62b, respectively. Thus, in this embodiment, the rolling element plunger 66a composed of the rolling element 68a and the spring member 70a, and the rolling element plunger 66b composed of the rolling element 68b and the spring member 70b constitute a stopper mechanism for the upper base plate 51. doing.

Next, a procedure for incorporating the ball 5 into the bearing assembly 3a will be described.
The frame type holder 21 is attached, and the bearing assembly 3 a in a state where the ball 5 is not contained is fitted into the bearing holding hole 53 of the upper base plate 51. At this time, the upper base plate 51 is moved to the rear side of the dovetail groove 57. Moreover, the bearing assembly 3a is arrange | positioned at the bearing holding hole 53 so that the frame type holder | retainer 21 may become an upper side. The wire 32 is suspended in the width direction of the assembly jig 150 at a position between the leg portions 13a and 13b. In this state, the frame retainer 21 is located slightly below the wire 32. Further, the rolling elements 68 a and 68 b of the respective rolling element plungers 66 a and 66 b are pressed against one side surface and the other side surface of the upper base plate 51, respectively. That is, the spring members 70a and 70b are in a compressed state.

  The upper base plate 51 is relatively moved along the groove 57 so that the long side portion 25a on the front side of the frame type cage 21 and the wire 32 are substantially overlapped in the vertical direction, and arranged at a substantially middle portion of the wire 32. The tip 31a of the hook 31 thus inserted is inserted into the deforming tool hole 29a on the front side in the moving direction formed in the frame type holder 21 of the bearing 3. Here, in FIG. 8, the wire 32 is drawn so that there is no margin in length, but actually, the wire 32 is easier to handle if there is an appropriate margin length. That is, in this state, the wire 32 is not tensed, and no tension, that is, tension force is generated.

  When the upper base plate 51 starts to move forward along the groove 57 with respect to the lower base plate 56, the rolling elements 68 a and 68 b roll on the side surfaces of the upper base plate 51 as the upper base plate 51 moves. Move. And the center part of the wire 32 is pulled to the front side, the margin length gradually disappears, and the wire 32 is tensioned to generate tension. That is, a tension force is generated on the wire 32. At the same time, the long side portion 25a on the side where the tool hole 29a of the frame type cage 21 is arranged begins to elastically deform in a bow shape toward the inside, that is, the long side portion 25b facing the rear side of the assembly jig 150. . That is, the tension force of the wire 32 is generated by the resistance force against the elastic deformation of the long side portion 25a. When the upper base plate 51 is further moved forward, the upper base plate 51 stops at a position where the end portion on the front side in the moving direction is in contact with the front inner wall surface of the dovetail groove 57 of the lower base plate 56. In this embodiment, the rolling elements 68a and 68b of the rolling element plungers 66a and 66b fall into the recesses 62a and 62b on both side surfaces of the upper base plate 51 at this position. Even when the rolling elements 68a and 68b have fallen into the recesses 62a and 62b, the spring members 70a and 70b are in a compressed state. Accordingly, even in this state, the rolling elements 68a and 68b are pressed against the recesses 62a and 68b by the spring members 70a and 70b. Thereby, the upper base plate 51 is fixed to the lower base plate 56. In that case, it becomes possible to incorporate the ball 5 safely in the gap portion for the ball formed by the deformation of the long side portion 25a of the frame type cage 21.

  In order to incorporate the ball 5 safely, it is necessary for the upper base plate 51 to be stationary with respect to the lower base plate 56 and to keep the deformation of the long side portion 25a. FIG. 9 shows a working state in which the linear guide device 1 can be assembled into a ball. Here, the wire 32 and the hook 31 are sufficiently flat with respect to the bearing assembly 3a and are compact so that the ball assembling work is not hindered. FIG. 9 shows a plurality of balls 5 assembled in this way. When the upper base plate 51 is released after the ball 5 has been assembled and the upper base plate 51 is moved to the initial position, the elastic force of the long side portion 25a is reduced at the same time as the tightening force of the wire 32 is reduced. At the same time, the gap for the ball becomes small, and the ball 5 cannot come out of the rolling groove 6. Thus, the upper base plate 51 is in a state in which the wire 32 is tensioned to generate tension, that is, a state in which a tension force is generated, and a state in which tension is not generated, that is, a state in which no tension force is generated. And can be switched. Next, the bearing assembly 3a is reversed in the front-rear direction, and the ball is assembled into the other rolling groove 6. When the balls 5 are assembled in both the rolling grooves 6, the operation of assembling the balls into the bearing assembly 3a is completed.

  As described above, in the second embodiment as well, as in the first embodiment, the deformed state of the long side portion can be reliably held, and the deformed state is not released unexpectedly during the ball mounting operation, and is easy and safe. Can be assembled into a ball, the work efficiency is improved, and the cage is simple in shape and light in weight, and the cost of resin molding is low, the linear guide device, the method for manufacturing the linear guide device, and the manufacturing method It is possible to provide a jig used for the above.

DESCRIPTION OF SYMBOLS 1 Linear motion guide device 2 Guide rail 3 Bearing 3a Bearing assembly 4 Guide rail mounting hole 5 Ball 6 Rolling groove 7 Escape groove 8 Bearing main body 9a, 9b End cap 10a, 10b Side seal 11 Grease nipple 12 Trunk part 13a, 13b Leg part 14 Rolling path 15a Curved path 16 Circulating path 17 Annular path 18 Rod type holder 19 Supply path 20 Seal lip 21 Frame type holders 22a, 22b Engaging parts 23a, 23b Recessed parts 24a, 24b Extending parts 25a, 25b Long side part 26a, 26b Short side part 27a, 27b Holding surface 28a, 28b Flat plate part 29a, 29b Deformation tool hole 31 Hook 32 Wire 33a, 33b Stand 50, 150 Assembly jig 51 Upper base plate 53 Bearing holding hole 54 Upper Hole 56 Lower base plate 57 Groove 58 Lower hole 60 Fixing pins 62a, 62 Recesses 64a, 64b lateral hole 66a, 66b rolling elements plunger 68a, 68b rolling elements 70a, 70b spring member

Claims (6)

In order to manufacture a linear guide device comprising a linear guide rail and a bearing straddled so as to be relatively movable on the guide rail,
A bearing body comprising a trunk portion to be disposed on the guide rail and a pair of leg portions extending from the trunk portion so as to extend along both side surfaces of the guide rail; and the leg portion And a frame-shaped ball cage having a pair of ball holding portions provided in a predetermined space surrounded by the body portion and having a flat plate-like extension portion extending along the pair of leg portions. Of the first and second members capable of relatively moving the cage assembly in the linear direction with the legs facing up, the extending direction of the legs on the first member is the first and second Place and fix so as to be orthogonal to the relative movement direction of the two members,
The tension generating member provided in the second member is locked in a hole formed in the extending portion on the front side in the relative movement direction of the first and second members, and the first member and the second member The ball guide is assembled by deforming the ball holding portion by the tension generated by tensioning the tension generating member by moving the tension generating member relative to each other by a predetermined amount, and assembling the bearing in the main body / retainer assembly. Manufacturing method. A jig for carrying out the manufacturing method of the linear guide device according to claim 1 ,
A first member for mounting and fixing the main body / retainer assembly with the legs facing up, and a first member that slidably supports the first member in a direction perpendicular to the longitudinal direction of the guide rail. A jig comprising two members and a tension generating member provided on the second member and engageable with the hole of the extending portion. The first member is an upper plate member having a bearing holding portion for mounting and fixing the main body / retainer assembly with the leg portion facing upward on the upper surface side, and the second member is an upper side surface The lower plate member supports the first member so as to be relatively movable in a linear direction, and the second member has a pair of guide portions for guiding the relative movement of the first member on both sides of the first member. The tension generating member is a linear member whose ends are fixed to both sides of the guide portion and whose central portion can be locked in the hole of the extending portion, and the linear member is When the first member is in the first position of the guide portion in a state where the portion is locked in the hole, no tension is generated, and when the first member is in the second position, a tension is generated. In a state where the ball holding portion on the side where the linear member is engaged is deformed. Jig of claim 2, characterized in that. The jig according to claim 3 , further comprising a stopper mechanism for making the first member stationary with respect to the second member in order to hold the deformed state of the ball holding portion. The stopper mechanism includes a through-hole penetrating the first member in the vertical direction, a hole provided in the second member, and facing the through-hole when the first member is in the second position; The jig according to claim 4 , comprising a rod-like member that is inserted into the through hole and the hole at the same time in a state where the through hole and the hole are opposed to each other. The guide portion is a dovetail groove provided on the upper surface side of the second member, and the stopper mechanism includes a recess formed on a surface of the first member facing the side wall of the dovetail groove, and the second member. A rolling element plunger comprising: a rolling element that engages with the recess when the first member is in the second position; and an elastic member that biases the rolling element toward the recess. The jig according to claim 4 , characterized in that it is characterized in that

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