JP5895453B2 - Temporary shaft for linear motion guide device - Google Patents

Description

  The present invention relates to a temporary shaft for temporarily assembling a slider removed from a guide rail when the linear motion guide device is transported or attached to a machine tool or the like.

  In a linear motion guide device including a guide rail and a slider slidably attached to the guide rail, the slider may be detached from the guide rail during transportation or attachment to a machine tool or the like. At this time, the slider removed from the guide rail is assembled to a resin temporary shaft. In such a case, various methods for fixing the slider to the temporary shaft or a stopper mechanism for preventing the drop-out have been proposed so that the slider does not fall off from the temporary shaft. A conventional slider fixing method or a stopper mechanism for preventing dropout will be described below.

  As a first example, a case where a slider is fixed to a temporary shaft using a rubber band will be described. In this case, grooves extending in the direction perpendicular to the longitudinal direction of the temporary shaft, that is, in the width direction of the temporary shaft are provided in the vicinity of both end portions of the lower surface of the temporary shaft. These two grooves are provided through the side surfaces on both sides of the temporary shaft. The slider is disposed on a temporary axis between these two grooves. In the temporary shaft and the slider in this state, the rubber band is hung on the temporary shaft and the slider as follows. In addition, in order to make it easy to understand the attachment state of a rubber band, it demonstrates as the state which elastically deformed the shape of the rubber band in the substantially square shape.

  First, a pair of opposed sides of a substantially rectangular rubber band are brought into contact with the two grooves on the lower surface of the temporary shaft from the lower side of the temporary shaft. At this time, the pair of opposing sides is parallel to the width direction of the temporary shaft, and the other pair of sides is parallel to the axial direction of the temporary shaft. From that state, the other pair of sides of the rubber band are stretched and hung on the upper surface of the slider. At this time, the other pair of sides are arranged on the upper surface of the slider so as to be parallel to each other at substantially the same interval as the width of the temporary shaft.

  If the rubber band is applied to the slider and the temporary shaft in this way, the slider and the temporary shaft are pressed toward each other due to the elasticity of the rubber band. As a result, the slider is fixed to the temporary shaft, and can be prevented from falling off from the temporary shaft.

  As a next example, a case where a slider is fixed to a temporary shaft using a fixing band will be described. Also in this case, a groove extending in a direction perpendicular to the longitudinal direction of the temporary shaft is formed near both ends of the lower surface of the temporary shaft, and the slider is disposed on the temporary shaft between these two grooves. The One fixing band is disposed near each end of the slider. Each fixing band is arranged in a state where the temporary shaft is surrounded in the circumferential direction at a position where the groove on the lower surface of the temporary shaft is present. If the fixed band is arranged in this manner, even if the slider moves in the axial direction, the slider is restricted from further axial movement by contacting the fixed band. As a result, the slider can be prevented from falling off from the temporary shaft.

  As yet another example, Patent Document 1 describes a stopper formed of a linear member (hereinafter abbreviated as “wire stopper”). FIG. 7A is an external view showing the shape of the wire rod stopper, and FIG. 7B is a side view showing a state in which the wire rod stopper is assembled to an insertion sleeve, that is, a temporary shaft. According to Patent Document 1, as shown in FIG. 7A, the wire rod stopper 201 includes a pair of leg portions 204 and 204 arranged in parallel and respective end portions on one side of the pair of leg portions 204 and 204. Are connected to each other, and a pair of locking portions 210 and 210 are formed by bending the other ends of the pair of leg portions 204 and 204 inward. As shown in FIG. 7B, the wire rod stopper 201 having such a configuration has a bridge portion 207 arranged on the upper surface of the insertion sleeve 213 along the width direction, and a pair of leg portions 204 and 204 of the insertion sleeve 213. It arrange | positions so that it may each diagonally extend along the side surface of both sides. The wire stopper 201 is engaged with the insertion sleeve 213 by inserting the locking portions 210 and 210 into the holes 216 provided on the side surfaces on both sides of the insertion sleeve 213. One wire rod stopper 201 is disposed at each end of the slider 219, and the bridge portion 207 of each wire rod stopper 201 comes into contact with each end portion of the slider 219, thereby restricting the movement of the slider 219 in the axial direction. Is prevented from falling off from the insertion sleeve 213.

Japanese Patent No. 3927282

  Dust-proof parts for preventing intrusion of dust and the like are attached to both ends of the slider. However, as the number of dust-proof parts to be attached increases, the total length of the slider including the dust-proof parts increases. FIGS. 8A and 8B are side views showing a state in which a slider having a long overall length is assembled to the temporary shaft. FIG. 8A shows a case where a rubber band is used, and FIG. 8B shows a case where a fixed band is used.

  When the dust-proof component 222 is attached and the overall length of the slider 219 is increased, when a rubber band is used, a large rubber band 225 is formed by connecting a plurality of rubber bands, and the slider 219 is fixed using the large rubber band 225. If it does so, the operation | work which connects several rubber bands will be needed in order to make the big rubber band 225, and workability | operativity will worsen. Further, as shown in FIG. 8A, the rubber band 225 is stretched and fixed to the limit, and the rubber band 225 may be cut. As a result, the slider 219 cannot be fixed to the temporary shaft 213, and the slider 219 cannot be prevented from falling off.

  In the case where the fixed band 228 is used, if the dustproof part 222 is attached and the total length of the slider 219 is equal to or longer than the length between the two grooves 231 and 231 on the lower surface of the temporary shaft 213, FIG. As shown, the end of the slider 219 is positioned in the vicinity of the end of the temporary shaft 213. In such a state, as shown in FIG. 8B, it is not possible to secure a sufficient space in which the fixed band 228 is disposed on the upper surface of the temporary shaft 213. If it does so, the attached fixed band 228 will shift | deviate and it will become easy to drop | omit, and depending on the case, attaching the fixed band 228 itself will become impossible. As a result, the slider 219 cannot be fixed to the temporary shaft 213, and the slider 219 cannot be prevented from falling off.

  On the other hand, in the wire rod stopper 201 described in Patent Document 1, the slider 219 can be fixed by using the wire rod stopper 201 that matches the entire length of the slider 219. That is, the wire stopper 201 in which the lengths of the legs 204 and 204 shown in FIG. 7A are changed is used. However, if it does so, it will be necessary to prepare the wire stopper 201 corresponding to each length with respect to the slider 219 of various full length, and a number of parts will increase. Moreover, it is necessary to replace and adjust the wire stopper 201 according to the length of the slider 219, and workability | operativity will worsen.

  The present invention has been made in view of such a situation, and provides a temporary shaft for a linear motion guide device capable of setting a slider drop-off preventing mechanism with good workability even with a long slider. Is an issue.

In order to achieve the above object, a temporary shaft for a linear motion guide device according to the present invention is a temporary shaft for a linear motion guide device for temporarily assembling a slider that is movably attached to the guide rail in the axial direction of the guide rail. In the shaft, at both ends in the axial direction of the temporary shaft, a drop-off prevention mechanism for preventing the slider assembled to the temporary shaft from dropping off from the both ends is provided, and at least the drop-off prevention mechanism is provided. One is provided with a moving member and a track for the moving member to move, and the moving member moves along the track so that the temporary member moves in the direction perpendicular to the axial direction. A first position in a state of projecting outward from the outer surface of the shaft, and a second position in a state of being inward of the outer surface in a direction perpendicular to the axial direction of the moving member. allow der switched bets is, the de The prevention mechanism includes a locking mechanism for locking the position of the moving member to the first position or the second position, and the locking mechanism is attached to either the moving member or the track. It is a concave portion that is formed on the other one of the formed convex portion and the moving member or the track and engages with the convex portion .

  Preferably, in the linear guide device temporary shaft according to the present invention, the moving member restricts the movement of the slider assembled to the temporary shaft in the axial direction at the first position. It is characterized by doing.

  Preferably, in the linear guide device temporary shaft according to the present invention, the moving member slides in a direction perpendicular to the axial direction on the track.

  Preferably, in the linear guide device temporary shaft according to the present invention, the track is formed by cutting out a part of an end surface of the end portion of the temporary shaft.

  Preferably, in the linear shaft for a linear motion guide device according to the present invention, a plurality of the convex portions and the concave portions are formed, and when the position of the moving member is the first position, A part of the convex part and a part of the plurality of concave parts are engaged, and when the second position is reached, all of the plurality of convex parts and all of the plurality of concave parts are It is characterized by being engaged.

  Preferably, in the linear guide device temporary shaft according to the present invention, the track is a dovetail groove, and the moving member is a plate member engaged with the dovetail groove.

  ADVANTAGE OF THE INVENTION According to this invention, even if it is a slider with a long full length, the provisional axis | shaft for linear motion guide apparatuses which can set the slider fall-off prevention mechanism with sufficient workability | operativity can be provided.

It is a fragmentary sectional view which shows the state currently assembled | attached to the guide rail with which the slider assembled | attached to the temporary shaft for linear motion guide apparatuses which concerns on this embodiment is used originally. It is a perspective view which shows the principal part of the temporary shaft for linear motion guide apparatuses which concerns on this embodiment. (A) is the front view which looked at the temporary shaft for linear motion guide apparatuses concerning this embodiment from the axial direction, Comprising: A stopper mechanism is decomposed | disassembled and shown, (b) is the AA line of (a). , BB line sectional drawing, (c) is a perspective view of (a). It is a perspective view of the principal part which shows the use condition of the temporary shaft for linear motion guide apparatuses which concerns on this embodiment, (a) shows the state in which the stopper is completely accommodated in the stopper insertion part, (b) is a stopper. Is shown in a state where the upper portion of the projection protrudes from the upper surface of the temporary shaft. (A), (b) is a side view which shows the state by which the slider was assembled | attached to the temporary shaft for linear motion guide apparatuses which concern on this embodiment, and the slider of (b) has dust-proof parts rather than (a). Many are installed. (A) is a perspective view which shows the principal part of the temporary shaft for linear motion guide apparatuses which concerns on the modification of this embodiment, (b) is sectional drawing of a stopper and a stopper insertion part, respectively, and the centerline of an up-down direction, respectively The cross section in is shown. (A) is an external view which shows the shape of the conventional wire rod stopper, (b) is a side view which shows the state which this wire rod stopper is assembled | attached to the insertion sleeve, and is used. It is a side view of the state which assembled | attached the slider with a long full length to the temporary shaft, (a) shows the case where a rubber band is used, (b) has shown the case where a fixed band is used.

  Embodiments of the present invention will be described below with reference to the drawings. First, the slider assembled to the temporary shaft for the linear motion guide device according to the present embodiment and the guide rail used for the original use of the slider will be described. In this specification, in a state where the guide rail or temporary shaft is normally horizontal, the longitudinal direction of the guide rail or temporary shaft is defined as the axial direction, and the direction perpendicular to the horizontal direction with respect to the axial direction is defined as the width. The direction perpendicular to the axial direction and the width direction is the vertical 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 or the temporary shaft.

  FIG. 1 is a partial cross-sectional view showing a state in which a slider assembled to a temporary shaft for a linear motion guiding apparatus according to the present embodiment is assembled to a guide rail that is used for original use.

  As shown in FIG. 1, the linear motion guide device 1 is movable in the axial direction through a guide rail 4 having a substantially square cross section extending in the axial direction and a steel ball 7 as a rolling element on the guide rail 4. And an assembled slider 10. The slider 10 is formed with a recess 13 extending in the axial direction on the lower surface side, and has a substantially U-shaped cross section. 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. A rolling groove 16 for rolling the steel ball 7 extends in the axial direction at the ridgeline where the side surface 4a and the upper surface 4c on one side of the guide rail 4 intersect. The rolling groove 16 is formed in a substantially ¼ arc shape in cross section. A similar 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, another rolling groove 16 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 other rolling groove 16 is formed in a substantially ½ arc shape in cross section. A similar rolling groove 16 is also formed at a substantially intermediate position in the vertical direction of the side surface 4b on the other side of the guide rail 4. Thus, the guide rail 4 is formed with four rolling grooves 16 in total, two on each of the side surfaces 4a and 4b.

  The slider 10 includes a slider main body 19 and end caps 22a and 22b that are detachably attached to respective end portions of the slider main body 19 in the axial direction. The slider body 19 connects a pair of legs 25a, 25b extending downward along the side surfaces 4a, 4b of the guide rail 4 and a pair of legs 25a, 25b on the upper surface 4c side of the guide rail 4. And a body portion 28. 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 slider 10 and prevent foreign matters such as dust from entering from the outside.

  Two rolling grooves 16, 16 formed on one side surface 4 a are formed on the inner surface of one leg portion 25 a of the slider body 19, that is, on the surface facing the one side surface 4 a of the guide rail 4. Rolling grooves 34 and 34 for rolling the steel balls 7 are formed at positions facing each other. Similar rolling grooves 34 and 34 (not shown) are also formed on the inner surface of the other leg portion 25 b of the slider body 19. A rolling path 37 for rolling the steel ball 7 is formed by the rolling grooves 16 on the guide rail 4 side and the rolling grooves 34 of the slider main body 19 facing each of the rolling grooves 16. Has been. The rolling path 37 has a substantially circular cross section. The guide rail 4 and the slider 10 are formed with four rolling paths 37 in total, two on each side.

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

  When the slider 10 is moved along the axial direction of the guide rail 4, the steel balls 7 positioned on the rolling path 37 roll in the rolling path 37 and move in the same direction as the slider 10 with respect to the guide rail 4. Moving. When the steel ball 7 reaches the end on one side of the rolling path 37, it enters a curved path provided in the end cap 22a (or 22b). The steel ball 7 entering the curved path makes a U-turn and enters the straight path 40, and rolls on the straight path 40 to reach the curved path provided in the opposite end cap 22b (or 22a). Then, it makes a U-turn again on the opposite curved path and returns to the other end of the rolling path 37. The steel ball 7 repeats such circulation in the circulation path 43 as the slider 10 moves.

  Further, since the guide rail 4 is used for the original use of the slider 10, a bolt hole 46 is provided for attaching the guide rail 4 to a mounting portion such as a machine tool.

  In such a linear motion guide device 1, the slider 10 is removed from the guide rail 4 and handled when transporting or mounting on a machine tool or the like. Further, when the slider 10 is compatible with other guide rails, the slider 10 is also removed from the original guide rail 1 when moving the slider 10 to another guide rail. If the slider 10 is removed from the guide rail 4, the steel ball 7 loaded on the slider 10 may fall off and become unusable. Therefore, when the slider 10 is removed from the guide rail 4, the slider 10 is assembled to a temporary shaft having the same outer shape as the outer shape of the guide rail 1 used for original use.

  Hereinafter, the temporary shaft for linear motion guide devices according to the present embodiment will be described. FIG. 2 is a perspective view showing a main part (one end part) of the temporary shaft for a linear motion guide device according to the present embodiment.

  As shown in FIG. 2, the linear guide device temporary shaft 49 (hereinafter, abbreviated as “temporary shaft 49”) according to the present embodiment is a long body, and the shape viewed from the axial direction is the guide rail 1. Is formed in substantially the same shape as seen from the axial direction. That is, the rolling grooves 52 similar to the rolling grooves 16 formed on both side surfaces 4 a and 4 b of the guide rail 1 are formed on both side surfaces of the temporary shaft 49. Further, unlike the guide rail 4, the temporary shaft 49 is for temporarily assembling the slider 10, so that the upper surface 50 does not need to be a functional plane. Therefore, a plurality of concave thinned portions 55 are formed on the upper surface 50 side of the temporary shaft 49 in order to improve the dimensional accuracy of the temporary shaft 49. The temporary shaft 49 is made of an oil resistant resin and is formed by injection molding.

  The temporary shaft 49 according to the present embodiment is provided with a thinned portion 55 on the end side. Therefore, the end portion of the temporary shaft 49 is a wall portion 58 having a certain thickness. That is, one surface of the wall 58 is the end surface 61 of the temporary shaft 49, and the other surface is one of the surfaces that form the thinned portion 55.

  Next, a stopper mechanism 64 provided on the temporary shaft 49 according to the present embodiment, which is a mechanism for preventing the slider 10 from falling off, will be described. FIG. 3A is a front view of the linear guide device temporary shaft 49 according to the present embodiment as viewed from the axial direction, showing the stopper mechanism 64 in an exploded manner, and FIG. It is sectional drawing of the -A line and sectional drawing of the BB line, (c) is a perspective view of (a).

  The temporary shaft stopper mechanism 64 according to the present embodiment is provided on the wall portion 58 at the end of the temporary shaft 49. Specifically, it is provided on the end surface 61 side of the temporary shaft 49 in the wall surface of the wall portion 58. The temporary shaft 49 according to the present embodiment is provided with stopper mechanisms 64 having the same configuration at both ends, but in this specification, the stopper mechanism 64 provided at one end is described. The description on the other side is omitted to avoid duplication.

  2 and 3, the end surface 61 of the temporary shaft 49 is formed with a groove 67 extending in the vertical direction from the upper surface 50 side of the temporary shaft 49 to the center of the end surface 61. . The groove 67 is formed by cutting out part of the upper surface 50 of the temporary shaft 49 and part of the end surface 61. The bottom surface 68 of the groove 67 is formed in parallel with the end surface 61 of the temporary shaft 49. The groove 67 is formed to have a dimension that the width on the bottom surface 68 side is wider than the width of the opening on the end surface 61 side of the temporary shaft 49, and the side surface is an inclined surface or a stepped portion. That is, the groove 67 is a dovetail groove having a substantially trapezoidal cross section. The groove 67 is formed at the central portion of the end surface 61 in the left-right direction when viewed from the axial direction of the temporary shaft 49, and is formed to have a width of about 1/3 to 1/4 of the entire width of the end surface 61. Further, the depth of the groove 67 is formed to be about half the thickness of the wall portion 58. In the present embodiment, the groove 67 serves as a stopper insertion portion of the stopper mechanism 64 (hereinafter, the groove 67 is referred to as a stopper insertion portion 67). The stopper insertion portion 67 is formed integrally with the temporary shaft 49 by injection molding.

  A stopper 70 is inserted into the stopper insertion portion 67 from the upper surface 50 side of the temporary shaft 49. The stopper insertion portion 67 and the stopper 70 constitute a stopper mechanism 64. The stopper 70 is a plate member and is made of an oil-resistant resin like the temporary shaft 49 and is formed by injection molding. The stopper 70 is formed in a dovetail shape corresponding to the dovetail groove shape of the stopper insertion portion 67. The height, width and thickness of the stopper 70 are formed slightly smaller than the height, width and depth dimensions of the dovetail groove shape of the corresponding stopper insertion portion 67. Further, the cross-sectional shape of the stopper 70 is a substantially trapezoidal shape corresponding to the cross-sectional shape of the dovetail groove of the stopper insertion portion 67. Since the stopper 70 has such a shape, the stopper 70 does not fall off in the axial direction of the temporary shaft 49 when inserted into the stopper insertion portion 67.

  The stopper 70 is slidable in the vertical direction with respect to the stopper insertion portion 67. That is, the stopper 70 engages with the dovetail groove of the stopper insertion portion 67 and slides in the vertical direction. In other words, the stopper insertion portion 67 is a track for the stopper 70 to slide up and down. As described above, the dimensions of the stopper 70 are slightly smaller than the corresponding dimensions of the stopper insertion portion 67, so that the stopper 70 can slide smoothly with respect to the stopper insertion portion 67. Further, since the stopper 70 is formed with such dimensions, the upper surface 73 of the stopper 70 is positioned slightly below the upper surface 50 of the provisional shaft 49 when inserted to the lowermost portion of the stopper insertion portion 67. It becomes. In other words, the stopper 70 is formed so that the upper surface 73 of the stopper 70 does not protrude above the upper surface 50 of the temporary shaft in a state where the stopper 70 is inserted to the lowermost portion of the stopper insertion portion 67. Furthermore, in other words, the stopper 70 is in a state where the entire stopper 70 is inside the upper surface 50 of the temporary shaft 49 in a direction perpendicular to the axial direction in a state where the stopper 70 is inserted to the lowermost portion of the stopper insertion portion 67. It is formed to become.

  On the bottom surface 68 of the stopper insertion portion 67, that is, the bottom surface of the dovetail groove, as shown in FIGS. Two convex portions 76 are formed at a predetermined interval in the vertical direction. On the other hand, the stopper 70 is provided with a recess 79 on the surface facing the bottom surface 68 of the stopper insertion portion 67. Two concave portions 79 are formed in the vertical direction at a predetermined interval. The depth dimensions of these concave portions 79 are the same as or slightly deeper than the height dimensions of the convex portions 76 of the stopper insertion portion 67. In addition, these two concave portions 79 are formed at positions corresponding to the two convex portions 76 of the stopper insertion portion 67 in a state where the stopper 70 is inserted to the lowermost portion of the stopper insertion portion 67. That is, when the stopper 70 is inserted to the lowermost portion of the stopper insertion portion 67, the two convex portions 76 of the stopper insertion portion 67 engage with the corresponding concave portions 79, respectively. By this engagement, the stopper 70 is locked in a state where it is inserted in the lowermost portion of the stopper insertion portion 67, and movement in the vertical direction is restricted.

  On the other hand, when the stopper 70 is slid upward from the state in which the stopper 70 is inserted to the lowermost part of the stopper insertion portion 67 and pulled up, the two recesses 79 of the stopper 70 both become two protrusions of the stopper insertion portion 67. The engagement with the portion 76 is released. At the same time, the upper portion of the stopper 70 begins to protrude above the upper surface 50 of the temporary shaft 49. When the stopper 70 is slid further upward, the lower concave portion 79 of the two concave portions 79 of the stopper 70 engages with the upper convex portion 76 of the stopper insertion portion 67. The upward sliding of the stopper 70 is restricted by the engagement, and the stopper 70 is locked to the stopper insertion portion 67. At this time, the lowermost portion of the stopper 70 is positioned above the lower convex portion 76 of the stopper insertion portion 67. At this time, the upper portion of the stopper 70 is in a state in which a predetermined amount projects upward from the upper surface 50 of the temporary shaft 49. In other words, a part of the stopper 70 is in a state outside the upper surface 50 of the stopper 49 in a direction perpendicular to the axial direction. The slider 10 (see FIG. 1) assembled to the temporary shaft 49 is restricted from moving in the axial direction when the end surface in the axial direction contacts the upper portion of the stopper 70 protruding from the temporary shaft 49.

  As described above, the stopper mechanism 64 includes a state in which the stopper 70 is inserted to the lowermost portion of the stopper insertion portion 67, that is, a state in which the stopper 70 is completely accommodated in the stopper insertion portion 67, and an upper portion of the stopper 70. It is possible to have two states, that is, a state in which a predetermined amount protrudes above the upper surface 50 of the substrate. These two states can be arbitrarily switched. Which of these two states is used depends on whether the upper and lower concave portions 79 of the stopper 70 are engaged with the upper and lower convex portions 76 of the stopper insertion portion 67 or the lower concave portion of the stopper 70. It is determined by selecting whether 79 is engaged with the convex portion 76 on the upper side of the stopper insertion portion 67. That is, the two concave portions 79 of the stopper 70 and the two convex portions 76 of the stopper insertion portion 67 constitute a positioning mechanism for the stopper 70 and further a movement restriction mechanism for the stopper 70. The temporary shaft 49 according to this embodiment is provided with stopper mechanisms 64 having such a configuration at both ends.

  Next, a method of using the stopper mechanism 64 of the temporary shaft 49 according to this embodiment will be described. Here, in order to make it easy to understand how to use the stopper mechanism 64, a case where the slider 10 (see FIG. 1) assembled to the guide rail 1 used for original use is temporarily moved to the temporary shaft 49 will be described. To do.

  FIG. 4 is a perspective view of a main part showing a use state of the temporary shaft 49 according to the present embodiment. FIG. 4A is a state where the stopper 70 is positioned at the lowermost portion of the stopper insertion portion 67, that is, the stopper insertion portion. 67 shows a state in which the stopper 70 is completely accommodated, and FIG. 7B shows a state in which the upper portion of the stopper 70 protrudes from the upper surface 50 of the temporary shaft 49.

  When the slider 10 is moved from the guide rail 1 to the temporary shaft 49, it is necessary to prevent the steel ball 7 loaded on the slider 10 from dropping off. Therefore, the slider 10 is moved from the guide rail 1 to the temporary shaft 49 in a state where the ends of the guide rail 1 and the temporary shaft 49 are in contact with each other. At this time, the stopper mechanism 64 of the temporary shaft 49 according to the present embodiment is in the following state. The stopper mechanism 64 at the end on the side abutted with the guide rail 1 is in the state shown in FIG. That is, the stopper 70 is inserted to the lowermost part of the stopper insertion portion 67, and the two concave portions 79 of the stopper 70 are engaged with the two convex portions 76 of the stopper insertion portion 67. At the same time, the stopper mechanism 64 at the opposite end is in the state shown in FIG. That is, the lower concave portion 79 of the stopper 70 is engaged with the upper convex portion 76 of the stopper insertion portion 67. Hereinafter, among the both end portions of the temporary shaft 49, the end portion on the side abutted with the guide rail 1 will be described as one end portion, and the opposite end portion will be described as the other end portion.

  In this state, the stopper 70 at one end is completely accommodated in the stopper insertion portion 67, and there is no portion protruding above the upper surface 50 of the temporary shaft 49. In addition, since the two concave portions 79 of the stopper 70 are engaged with the two convex portions 76 of the stopper insertion portion 67, the movement of the stopper 70 in the vertical direction is restricted. Therefore, the slider 10 can be smoothly moved from the guide rail 1 to the temporary shaft 49. On the other hand, the stopper 70 at the other end projects a predetermined amount above the upper surface 50 of the temporary shaft 49, and the recess 79 on the lower side of the stopper 70 forms a protrusion 76 on the upper side of the stopper insertion portion 67. Since it is engaged, vertical movement is restricted. Therefore, even if the slider 10 moved to the temporary shaft 49 further moves toward the other side, the other end portion of the slider 10 comes into contact with the portion of the stopper 70 protruding upward, so that further Movement is restricted. As a result, the slider 10 can be prevented from falling off from the other end of the temporary shaft 49.

  When the slider 10 is completely moved toward the temporary shaft 49, the one end portion of the temporary shaft 49 and the end portion of the guide rail 1 are separated from each other, and the stopper 70 at the one end portion is pulled upward. That is, the state shown in FIG. Then, the stopper 70 at the end on one side is also locked in a state where a part of the stopper 70 protrudes above the upper surface 50 of the temporary shaft 49, and restricts the movement of the slider 10 to one side. As a result, it is possible to prevent the slider 10 from falling off from one end of the temporary shaft 49. Thus, the assembly of the slider 10 to the temporary shaft 49 and the setting of the stopper mechanism 64 which is a mechanism for preventing the slider 10 from falling off are completed.

  Thus, the stopper mechanism 64 of the temporary shaft 49 according to the present embodiment can be set in a drop-off prevention state with one touch by sliding the stopper 70 with the stopper insertion portion 67. Further, since the stopper 70 can be positioned by the engagement between the concave portion 79 of the stopper 70 and the convex portion 76 of the stopper insertion portion 67, the workability is good.

  In addition, since the temporary shaft 49 according to the present embodiment is provided with the stopper mechanisms 64 at the extreme ends of both ends, even the slider 10 having almost the same total length as the temporary shaft 49 is prevented from falling off. Can be assembled in the state. That is, even if the slider 10 has a long overall length by attaching many dustproof parts to the end portion, it can be assembled in a state in which it is reliably prevented from falling off. 5 is a side view showing a state in which the slider 10 having a long overall length is attached to the temporary shaft 49 according to the present embodiment by attaching a large number of dustproof parts 82 to the end portion, and (b). The slider 10 is provided with more dust-proof parts 82 than the slider 10 of FIG.

  As shown in FIGS. 5A and 5B, the temporary shaft 49 according to the present embodiment can be assembled with the slider 10 having various full lengths. Furthermore, even if the slider 10 has a different total length, the method of using the stopper mechanism 64 is the same, and there is no need to replace parts in accordance with the total length of the slider 10 to be assembled. Therefore, the workability of the stopper mechanism 64 when assembling the slider 10 is good regardless of the overall length of the slider 10.

  As described above, the temporary shaft 49 according to this embodiment can set the stopper mechanism 64 in a drop-off prevention state with one touch regardless of the total length of the slider 10 to be assembled, and the workability is good. The stopper insertion portion 67 can be molded integrally with the temporary shaft 49, and the same stopper 70 is inserted into the stopper insertion portion 67 regardless of the total length of the slider 10 to be assembled. It can be reduced and parts management is easy. Furthermore, since the stopper 10 is not used after being removed from the stopper insertion portion 67, the stopper 70 is not lost.

(Modification)
Next, a modification of this embodiment will be described. The modified example will be described with a focus on a different configuration from the above-described embodiment, and a redundant description of the same configuration will be omitted.

Fig.6 (a) is a perspective view which shows the principal part of the temporary shaft which concerns on the modification of this embodiment.
The temporary shaft 149 according to this modification is substantially the same as that in the above embodiment. That is, it is a long body extending in the axial direction, and the shape seen from the axial direction is formed substantially the same as the shape seen from the axial direction of the guide rail 1 (see FIG. 1).

  In the present modification, the configuration of the stopper mechanism 164 provided at the end of the temporary shaft 149 is different from that in the above embodiment. Hereinafter, the stopper mechanism 164 of the temporary shaft 149 according to this modification will be described. In this modification, the left side of the provisional shaft 149 shown in FIG. 6A toward the end surface 161 will be described as the left side of the provisional shaft 149, and the right side will be described as the right side of the provisional shaft 149.

  As shown in FIG. 6A, a groove 167 extending in the width direction from the left side surface side of the temporary shaft 149 to the center portion of the end surface 161 is formed on the end surface 161 of the temporary shaft 149 according to this modification. ing. The groove 167 is formed by cutting out a part of the left side surface of the temporary shaft 149 and a part of the end surface 161. The bottom surface 168 of the groove 167 is formed in parallel with the end surface 161 of the temporary shaft 149. The groove 167 is formed such that the vertical width on the bottom surface 168 side is wider than the vertical width of the opening portion on the end surface 161 side of the temporary shaft 149, and the side surface is an inclined surface or a stepped portion. That is, the groove 167 is a groove having a substantially trapezoidal cross section. The groove 167 is formed at the center of the end surface 161 in the vertical direction when viewed from the axial direction of the temporary shaft 149, and has a vertical width of about 1/3 to 1/4 of the total height of the end surface 161. . Further, the depth of the groove 167 is formed to be about half the thickness of the wall portion 158. In this modification, the groove 167 serves as a stopper insertion portion of the stopper mechanism 164 (hereinafter, the groove 167 is referred to as a stopper insertion portion 167).

  A stopper 170 is inserted into the stopper insertion portion 167 from the left side surface side of the temporary shaft 149. The length, the vertical width, and the thickness of the stopper 170 are formed to be smaller than the dimensions of the corresponding groove shape of the stopper insertion portion 167, the vertical width, and the depth. Further, the cross-sectional shape of the stopper 170 is a substantially trapezoidal shape corresponding to the cross-sectional shape of the dovetail groove of the stopper insertion portion 167. Since the stopper 170 has such a shape, the stopper 170 does not fall off in the axial direction of the temporary shaft 149 when inserted into the stopper insertion portion 167. The stopper 170 is slidable in the width direction with respect to the stopper insertion portion 167.

  As described above, each dimension of the stopper 170 is smaller than each dimension of the stopper insertion portion 167. Therefore, when the stopper insertion portion 167 is inserted to the rightmost side, the left side surface of the stopper 170 is a temporary axis. 149 is located on the right side of the left side surface. That is, the stopper 170 is formed so that the left side surface of the stopper 170 does not protrude to the left of the left side surface of the temporary shaft 149 when the stopper 170 is inserted to the rightmost side of the stopper insertion portion 167. In other words, the entire stopper 170 is formed so as to be inside the left side surface of the temporary shaft 149 in the direction perpendicular to the axial direction.

  FIG. 6B is a cross-sectional view of the stopper 170 and the stopper insertion portion 167, each showing a cross section along the center line in the vertical direction. As shown in FIG. 6B, a convex portion 176 that protrudes in the axial direction of the temporary shaft 149 is provided on the bottom surface 168 of the stopper insertion portion 167. Two convex portions 176 are formed at a predetermined interval in the width direction. On the other hand, the stopper 170 is provided with a recess 179 on the surface facing the bottom surface 168 of the stopper insertion portion 167. Two concave portions 179 are formed at a predetermined interval in the width direction. These two concave portions 179 are formed at positions corresponding to the two convex portions 176 of the stopper insertion portion 167 in a state where the stopper 170 is inserted to the rightmost side of the stopper insertion portion 167. That is, when the stopper 170 is inserted to the rightmost side of the stopper insertion portion 167, the two convex portions 176 of the stopper insertion portion 167 are formed at positions that engage with the corresponding concave portions 179, respectively. By this engagement, the stopper 170 is locked in a state where it is inserted to the rightmost side of the stopper insertion portion 167, and movement in the width direction is restricted.

  On the other hand, when the stopper 170 is slid to the left from the state in which the stopper 170 is inserted to the rightmost side of the stopper insertion portion 167, both the two concave portions 179 of the stopper 170 become two convex portions of the stopper insertion portion 167. The engagement with the portion 176 is released. At the same time, the left portion of the stopper 170 starts to protrude leftward from the left side surface of the temporary shaft 149. When the stopper 170 is further slid leftward, the right concave portion 179 of the two concave portions 179 of the stopper 170 engages with the left convex portion 176 of the stopper insertion portion 167. The leftward sliding of the stopper 170 is restricted by the engagement, and the stopper 170 is locked to the stopper insertion portion 167. At this time, the rightmost portion of the stopper 170 is located on the left side of the right convex portion 176 of the stopper insertion portion 167. At this time, the left portion of the stopper 170 is in a state in which a predetermined amount protrudes to the left from the left side surface of the temporary shaft 149. In other words, a part of the stopper 170 is outside the left side surface of the temporary shaft 149 in the direction perpendicular to the axial direction. The slider 10 (see FIG. 1) assembled to the temporary shaft 149 is in contact with the left portion of the stopper 170 protruding from the temporary shaft 149 at the portion corresponding to the left leg 25b of the axial end surface. By doing so, movement in the axial direction is restricted.

  As described above, the stopper mechanism 164 of the temporary shaft 149 according to this modification is in a state where the stopper 170 is inserted to the rightmost side of the stopper insertion portion 167, that is, a state where the stopper 170 is completely accommodated in the stopper insertion portion 167. And a state in which the left portion of the stopper 170 protrudes to the left by a predetermined amount from the left side surface of the temporary shaft 149. These two states can be arbitrarily switched. Which of these two states is used depends on whether the left and right concave portions 179 of the stopper 170 are engaged with the two left and right convex portions 176 of the stopper insertion portion 167, or the concave portion 179 on the right side of the stopper 170. Is determined by selecting whether or not is engaged with the convex portion 176 on the left side of the stopper insertion portion 167. In other words, the two concave portions 179 of the stopper 170 and the two convex portions 176 of the stopper insertion portion 167 constitute a positioning mechanism of the stopper 170 and further a movement restricting mechanism. The temporary shaft 149 according to this modification is provided with stopper mechanisms 164 having such a configuration at both ends.

  The method of using the stopper mechanism 164 of the temporary shaft 149 according to this modification is the same as that of the above embodiment except that the sliding direction of the stopper 170 is the left-right direction, and thus the description thereof is omitted.

  The temporary shaft 149 according to this modification also exhibits the same effect as the above embodiment. That is, regardless of the overall length of the slider 10 to be assembled, the stopper mechanism 164 can be set in a drop-off prevention state with one touch, and the workability is good. The stopper insertion portion 167 can be molded integrally with the temporary shaft 149, and the same stopper 170 is inserted into the stopper insertion portion 167 regardless of the total length of the slider 10 to be assembled. It can be reduced and parts management is easy. Furthermore, since the stopper 170 is not used after being removed from the stopper insertion portion 167, the stopper is not lost.

  This is the end of the description of the embodiment and modification of the present invention. However, the present invention is not limited to the above embodiment and modification, and can be modified as appropriate. For example, the number of rolling grooves provided on the temporary shaft may be one on one side or three. Further, the stopper mechanism according to the present embodiment or the modification may be provided only at one end portion, and another type of stopper mechanism may be provided at the other end portion. The other type of stopper is, for example, a fixed type stopper, and may be a convex portion provided on the upper surface of the temporary shaft, a known wire rod stopper, or the like. The groove shape of the stopper insertion portion and the corresponding cross-sectional shape of the stopper may not be trapezoidal as long as the stopper does not fall off in the axial direction and can be slid. For example, convex ridges may be formed on both side surfaces of the stopper, and concave grooves that engage with the ridges may be formed on both side surfaces of the groove that is the stopper insertion portion. Moreover, a recessed part may be provided in the bottom face of a stopper insertion part, and a convex part may be provided in the surface on the side facing the bottom face of the stopper insertion part of a stopper. Moreover, in the said modification, although the stopper insertion part is extended and provided in the width direction from the left side surface side of a temporary shaft to the center part of an end surface, you may provide from the right side surface side of a temporary shaft. Moreover, the dimensions of the stopper insertion portion and the stopper can be changed as appropriate.

DESCRIPTION OF SYMBOLS 1 Linear motion guide apparatus 4 Guide rail 7 Steel ball 10 Slider 13 Recess 16 Rolling groove 19 Main part 22 End cap 25 End part 25 (Slider) Leg part 28 Body part 31 Side seal 34 (Slider) Rolling groove 37 Rolling path 40 Straight path 43 Circulating path 46 Bolt hole 49 Temporary shaft 52 Rolling groove 55 (temporary shaft) Rolling groove 55 Wall portion 61 End surface 64 of temporary shaft Stopper mechanism 67 Stopper insertion portion 70 Stopper 73 Upper surface 76 of stopper Concave portion 82 Dust-proof component 201 Wire rod stopper 213 Insert sleeve 225 Rubber band 228 Fixing band

Claims (6)

In the temporary shaft for a linear motion guide device for temporarily assembling a slider, which is attached to the guide rail so as to be movable in the axial direction of the guide rail,
At both ends in the axial direction of the temporary shaft, a drop-off prevention mechanism is provided to prevent the slider assembled to the temporary shaft from falling off from the both ends.
At least one of the drop-off prevention mechanisms includes a moving member and a track for moving the moving member,
The moving member moves along the track and has a first position in a state where a part of the moving member protrudes outward from the outer surface of the temporary shaft in a direction perpendicular to the axial direction. , Ri can der entirely switched to the second position in a state where the inside than the outer side about the direction intersecting at right angles with the axial direction of said moving member,
The drop-off prevention mechanism includes a locking mechanism for locking the position of the moving member at the first position or the second position,
The locking mechanism includes a convex portion formed on one of the moving member and the track, and a concave portion formed on either the moving member or the track and engaging the convex portion. A temporary shaft for a linear motion guide device.   2. The linear motion guide temporary shaft according to claim 1, wherein the moving member restricts the movement of the slider assembled to the temporary shaft in the axial direction at the first position. .   The temporary shaft for a linear motion guide device according to claim 1, wherein the moving member slides on the track in a direction perpendicular to the axial direction.   4. The temporary shaft for a linear motion guide device according to claim 1, wherein the track is formed by cutting out a part of an end surface of the end portion of the temporary shaft. 5. A plurality of the protrusions and the recesses are formed, and when the position of the moving member is the first position, a part of the plurality of protrusions and a part of the plurality of recesses but engaged, the time of the second position, and all of the plurality of convex portions, any one of 4 claims 1 and all of the plurality of recesses and wherein the engaged Temporary shaft for linear motion guide device as described in the paragraph . The temporary shaft for a linear motion guide device according to any one of claims 1 to 5 , wherein the track is a dovetail groove, and the moving member is a plate member engaged with the dovetail groove.

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