JP2014055615A - Linear guide device and linear actuator device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a linear guide device and a linear actuator device capable of easily and quickly adjusting pre-load between a guide rail and a guide member.SOLUTION: A linear guide device 13 includes: a guide rail 14; a table member 17; and a guide member 15 which includes an upper surface 27 opposed to an inner bottom surface 26 of the table member 17 and an inside surface 22 opposed to a side surface 19 of the guide rail 14, and is mounted in the table member 17 so as to linearly move along the guide rail 14 together with the table member 17. An insertion hole 31 into which a cap bolt 16 is inserted is formed to penetrate from the upper surface 27 side of the table member 17 to the inner bottom surface 26. A screw hole 30 into which the cap bolt 16 is screwed is formed on the upper surface 27 of the guide member 15. A space section K connected to the insertion hole 31 is formed between the inner bottom surface 26 and the upper surface 27 in a state in which the guide member 15 is mounted in the table member 17 by fastening force of the cap bolt 16.

Description

  The present invention relates to a linear guide device capable of adjusting a preload between a guide rail and a guide member, and a linear actuator device including the linear guide device.

  Generally, a linear actuator device is installed in a device such as a precision machine tool, and is used to linearly move a jig, a workpiece, or the like by a predetermined distance (see, for example, Patent Document 1). Such a linear actuator device includes a rectangular cylinder body, a guide rail integrally formed on the cylinder body, and a slide table that reciprocates linearly along the guide rail based on the reciprocating movement of a piston in the cylinder body. And.

  The slide table is formed in a substantially inverted U shape in a sectional view having a concave groove wider than the guide rail on the lower surface on the guide rail side. Then, four guide blocks (guide members) are respectively attached to the positions facing the side surfaces of the guide rail in the concave groove of the slide table by bolts screwed from the outside. Two guide blocks are arranged along both side surfaces of the guide rail.

  Further, on the surface of each guide block that faces the side surface of the guide rail, a protrusion that engages with the guide groove formed on both side surfaces of the guide rail is formed. The slide table is displaced along the guide rail with the movement of the piston while engaging the protrusion of each guide block with the guide groove of the guide rail.

Japanese Patent Laid-Open No. 7-158610

  By the way, the linear actuator device needs to adjust the preload between the guide rail and the guide block in order to suppress the rattling of the guide block with respect to the guide rail after installation. However, various problems have been pointed out in the past in adjusting the preload.

  First, when adjusting the preload by moving the guide block toward or away from the side surface of the guide rail through the screwing operation of the bolt, the upper surface of the guide block is set to the side surface of the guide rail with the lower surface of the slide table as a copying surface. Move forward and backward. Therefore, the lower surface of the slide table that becomes the copying surface is required to have high processing accuracy with smoothness, and the manufacturing cost of the entire apparatus increases, and if the copying surface is not smooth, the advance / retreat operation of the guide block becomes unstable, There was a problem that it was difficult to adjust the preload.

  In addition, a long groove along the longitudinal direction of the guide rail is formed opposite to each of the side surface of the guide rail and the guide block facing the side surface, and a number of steel balls (rolling elements) are interposed between the long grooves. In the linear actuator device, the preload between the guide rail and the guide block is adjusted by exchanging the size of all the steel balls in units of micrometers.

  That is, in such a linear actuator device, a plurality of different sizes of steel balls used are prepared, and the entire linear actuator device is exchanged for a large device to which the linear actuator device is attached. Thus, the preload between the guide rail and the guide block is adjusted. For this reason, there is a problem that it takes time to adjust the preload in terms of replacing the entire linear actuator device.

  The present invention has been made paying attention to such problems. An object of the invention is to provide a linear guide device and a linear actuator device that can easily and quickly adjust the preload between the guide rail and the guide member.

  A linear guide device that solves the above problems includes a guide rail, a table member that is provided to be linearly movable along the guide rail, a mounted surface that faces the mounting surface on the guide rail side of the table member, and The guide rail has a guided surface facing a guide surface extending along the longitudinal direction, the mounting surface is opposed to the mounting surface, and a gap is provided between the guided surface and the guide surface. And a guide member attached to the table member so as to move along the guide rail together with the table member, and an insertion hole for inserting a screw member is provided in the table member. The screw member is formed so as to penetrate from the outer surface side to the mounting surface, and the screw member is screwed onto the mounting surface of the guide member. In the state where the guide member is attached to the table member by the tightening force of the screw member that is inserted into the insertion hole and screwed into the screw hole, the attachment of the table member is performed. A space portion connected to the insertion hole is formed between the surface and the mounted surface of the guide member.

In the linear guide device, it is preferable that the space portion is connected to the insertion hole from at least one direction including a width direction orthogonal to a longitudinal direction of the guide rail.
In the linear guide device, it is preferable that the insertion hole is formed in a plurality of locations in the table member, and the screw member is inserted into each insertion hole.

  In the linear guide device, the space portion is formed at a center portion in a width direction orthogonal to a direction in which the guide rail extends on the mounting surface side of the table member, and the insertion hole extends the guide rail in the width direction. It is preferable that the plurality of positions sandwiched from both sides of the guide member are formed at positions farther from the center position in the width direction than the guided surface of the guide member.

The said linear guide apparatus WHEREIN: It is preferable that the said space part is comprised by the recessed part formed so that it might connect with the said insertion hole in the said attachment surface in the said table member.
In the linear guide device, it is preferable that the insertion hole entirely overlaps the space portion when projected in the insertion direction of the screw member.

In the linear guide device, it is preferable that a part of the insertion hole overlaps the space when projected in the insertion direction of the screw member.
A linear actuator device that solves the above problems includes the linear guide device having the above-described configuration and a drive unit that drives the table member.

  It is possible to easily and quickly adjust the preload between the guide rail and the guide member.

The perspective view of the linear actuator apparatus of one Embodiment. The perspective view which shows a state when the table member is slid from the reference position to the slide position in FIG. FIG. 3 is a cross-sectional view taken along line 3-3 in FIG. 1. The bottom view of the table member of the linear actuator device. The schematic diagram which shows the state when fastening a cap volt | bolt in the linear guide apparatus of the linear actuator apparatus. The schematic diagram which shows a state when a cap bolt is fastened in FIG. 5 and a guide member carries out distortion deformation. The graph which shows the relationship between the clamping force of a cap bolt, and the preload between a guide rail and a guide member. The bottom view of the table member of the linear actuator apparatus of the example of a change. (A) is a bottom view of a table member of a linear actuator device of another modification, (b) is a side view of a state in which a guide member is assembled to the table member shown in (a).

Hereinafter, an embodiment of a linear actuator device will be described with reference to the drawings.
As shown in FIG. 1, the linear actuator device 11 has a substantially rectangular parallelepiped shape as a whole, and includes a base member 12 and a linear guide device 13 provided on the base member 12.

  As shown in FIGS. 2 and 3, the linear guide device 13 includes a block-shaped guide rail 14 provided on the base member 12 so as to extend over the entire longitudinal direction Y at the center in the width direction X. A guide member 15 movably fitted on the guide rail 14 and a table member 17 attached on the guide member 15 are provided. In this case, the guide member 15 and the table member 17 are fastened by cap bolts 16 as an example of a plurality (four in this embodiment) of screw members.

  As shown in FIG. 3, the upper surface 18 and both side surfaces 19 in the width direction X of the guide rail 14 constitute a guide surface that guides the guide member 15 when the guide member 15 moves along the guide rail 14. . A guide groove 20 that is fitted to the guide rail 14 from above is formed on the lower surface of the guide member 15 so as to extend in the longitudinal direction Y. The inner bottom surface 21 of the guide groove 20 of the guide member 15 and both inner side surfaces 22 in the width direction X constitute guided surfaces that face the upper surface 18 and both side surfaces 19 of the guide rail 14, respectively.

  A gap is interposed between both inner side surfaces 22 of the guide groove 20 of the guide member 15 and both side surfaces 19 of the guide rail 14. The gap is in sliding contact with each other's inner surfaces (that is, both side surfaces 19 of the guide rail 14 functioning as a guide surface and both inner side surfaces 22 of the guide groove 20 of the guide member 15 functioning as a guided surface). It is a minute gap to make it possible. Further, long grooves 23 extending in the longitudinal direction Y are formed on both side surfaces 19 of the guide rail 14 and both inner side surfaces 22 of the guide groove 20 of the guide member 15 facing the both side surfaces 19 so as to face each other. A large number of steel balls 24 are interposed between the opposing long grooves 23 so as to roll.

  On the lower surface of the table member 17, a mounting groove 25 that is fitted to the guide member 15 from above is formed so as to extend in the longitudinal direction Y. The inner bottom surface 26 of the mounting groove 25 of the table member 17 constitutes a mounting surface that faces the upper surface 27 of the guide member 15 when the guide member 15 is mounted on the table member 17. On the other hand, the upper surface 27 of the guide member 15 constitutes a mounted surface that faces the inner bottom surface 26 of the mounting groove 25 of the table member 17 when the guide member 15 is mounted on the table member 17.

  As shown in FIGS. 3 and 4, cap bolts 16 are provided in the vicinity of the four corners on the upper surface 27 of the guide member 15 having a rectangular shape in plan view so as to be paired in the width direction X and the longitudinal direction Y, respectively. Screw holes 30 to be screwed are formed. On the other hand, the cap bolt 16 is inserted into the table member 17 at a position corresponding to each screw hole 30 of the guide member 15 in the vertical direction so as to penetrate from the upper surface side (outer surface side) to the inner bottom surface 26 of the mounting groove 25. Each possible insertion hole 31 is formed.

  In this case, each insertion hole 31 is located at a position farther from the center position in the width direction X in the linear guide device 13 than both inner side surfaces 22 of the guide groove 20 of the guide member 15. In addition, the upper end part of each insertion hole 31 is expanded in diameter so that the head of the cap bolt 16 may be accommodated.

  In addition, a concave portion 32 having a substantially rectangular shape is formed at a central portion in the width direction X of the inner bottom surface 26 of the mounting concave groove 25 of the table member 17 from a direction orthogonal to the insertion direction of the cap bolt 16 into each insertion hole 31. It is formed so as to be connected to each insertion hole 31. Therefore, in the state where the guide member 15 is attached to the table member 17 by the tightening force of each cap bolt 16 that is inserted into each insertion hole 31 of the table member 17 and screwed into each screw hole 30 of the guide member 15, the recess 32. And a space K is formed between the guide member 15 and the upper surface 27 of the guide member 15. That is, the space K is constituted by the space in the recess 32.

  As shown in FIG. 4, the recess 32 includes a first recess 32a and four second recesses 32b. The first recess 32 a has a rectangular shape that extends from the central portion in the longitudinal direction Y of the table member 17 to one end and extends to the inside of each insertion hole 31 in the width direction X. Each second recess 32b is projected from the position corresponding to each insertion hole 31 at the end edge in the width direction X of the first recess 32a in the insertion direction of each cap bolt 16 into each insertion hole 31. Is formed in a substantially rectangular shape that spreads outward in the width direction X.

  The length in the longitudinal direction Y of each second recess 32b is set to about 1.5 times the diameter of the insertion hole 31, while the length in the width direction X of each second recess 32b is the same as the diameter of the insertion hole 31. It is set to be. Accordingly, each second recess 32 b is connected to each insertion hole 31 from the outside in the longitudinal direction Y, and each first recess 32 a is connected to each insertion hole 31 from the inside in the width direction X. Therefore, the concave portion 32 is connected to each insertion hole 31 from two directions of the longitudinal direction Y and the width direction X of the guide rail 14.

  As shown in FIG. 3, the base member 12 is formed with a pair of cylinder holes 35 extending in the longitudinal direction Y in the width direction X. A piston 37 is slidably disposed in each cylinder hole 35 via a packing 36. One end of a piston rod 38 is connected to the center of each piston 37, while the other end of each piston rod 38 is substantially rectangular outside each cylinder hole 35, as shown in FIGS. Each of the plate-like connecting members 39 is connected to the lower end portion by a cap bolt 40.

  The upper end portion of the connecting member 39 is connected to the end portion of the table member 17 opposite to the cap bolt 16 side in the longitudinal direction Y by the cap bolt 41. Then, compressed air is supplied to each cylinder hole 35 from an air compressor (not shown), so that each piston rod 38 is accommodated in each cylinder hole 35 and a position protruding from each cylinder hole 35 to the outside. Reciprocate between.

  By the reciprocating movement of each piston rod 38, the table member 17 is connected to the reference position (the position shown in FIG. 1) where the entire table member 17 is positioned on the base member 12 via the connecting member 39, and the table member 17 is reduced. The half slides (drives) between the slide position (position shown in FIG. 2) shifted from the base member 12 toward the connecting member 39 in the longitudinal direction Y.

  That is, the table member 17 is linearly movable between the reference position and the slide position along the guide rail 14 together with the guide member 15 by the reciprocating movement of each piston rod 38. In the present embodiment, each cylinder hole 35, each packing 36, each piston 37, and each piston rod 38 constitute a drive unit.

Next, an effect | action at the time of adjusting the preload between the guide rail 14 and the guide member 15 in the linear guide apparatus 13 is demonstrated.
As shown in FIG. 5, in the state where the guide member 15 is fastened to the table member 17 by the fastening force based on the screwing operation of the cap bolt 16, when the fastening force of the cap bolt 16 is further increased, the guide A drawing force toward the table member 17 is applied to the vicinity of the screw hole 30 in which the cap bolt 16 is screwed in the upper surface 27 of the member 15.

  In such a case, when the concave portions 32 (space portions K) connected to the respective insertion holes 31 are not formed on the inner bottom surface 26 of the mounting concave groove 25 of the table member 17, the tightening force of the cap bolt 16 is increased. However, the inner bottom surface 26 of the mounting groove 25 and the upper surface 27 of the guide member 15 only maintain the same surface contact state as before the tightening force of the cap bolt 16 is increased.

  For this reason, the preload between the both inner side surfaces 22 of the guide groove 20 of the guide member 15 and the both side surfaces 19 of the guide rail 14 does not change. That is, the preload applied to the steel ball 24 is not adjusted. Therefore, as indicated by the broken line A in the graph of FIG. 7, even if the tightening force of the cap bolt 16 is increased, the preload applied to the steel ball 24 (the sliding of the guide member 15 through the steel ball 24 against the guide rail 14). (Dynamic resistance) becomes almost constant.

  On the other hand, in the linear guide device 13 of the present embodiment, the concave portions 32 (space portions K) connected to the respective insertion holes 31 are formed on the inner bottom surface 26 of the mounting concave groove 25 of the table member 17. Further, the recess 32 is connected to each insertion hole 31 from both the longitudinal direction Y and the width direction X of the guide rail 14. For this reason, as shown in FIG. 6, when the tightening force of the cap bolt 16 is further increased, the guide member 15 is deformed and deformed as follows. That is, the guide member 15 has a fulcrum as a fulcrum at a portion of the peripheral portion of each insertion hole 31 in the inner bottom surface 26 of the mounting groove 25 of the table member 17 that contacts the upper surface 27 of the guide member 15. Based on the principle of an insulator in which a portion to which a tightening force by the cap bolt 16 is locally applied is a force point, the upper surface 27 is deformed and deformed so that a portion facing the concave portion 32 is drawn toward the concave portion 32 side.

  At this time, the following moment is generated in the guide member 15. First, since the second concave portion 32 b is connected to the insertion hole 31 from the longitudinal direction Y, the concave portion 32 generates a pitching moment that rotates around an axis along the width direction X perpendicular to the longitudinal direction Y. In addition, since the first recess 32 a is connected to the insertion hole 31 from the width direction X in the recess 32, a rolling moment that rotates around an axis along the longitudinal direction Y orthogonal to the width direction X is generated. Further, a moment (for example, a yawing moment rotating around an axis along a height direction orthogonal to both the longitudinal direction Y and the width direction X) is generated due to a resultant force of the pitching moment and the rolling moment.

  Then, the guide member 15 is displaced by the moment generated by the distortion deformation, so that the portion where the inner bottom surface 21 and both inner side surfaces 22 of the guide groove 20 are formed is also displaced. The minute gap between both inner side surfaces 20 of the 20 and both side surfaces 19 of the guide rail 14 changes as follows.

  That is, in the present embodiment, in the state viewed from the longitudinal direction Y of the linear guide device 13 (the state shown in FIGS. 5 and 6), the center axis line of each insertion hole 31 and the both side surfaces 19 of the guide rail 14 A concave portion 32 (space portion K) exists between the side surface 19 closer to each insertion hole 31. Therefore, when the tightening force of the cap bolt 16 is strengthened, both inner side surfaces 22 of the guide concave grooves 20 of the guide member 15 are slightly applied to both side surfaces 19 of the guide rail 14 in accordance with distortion deformation due to the pulling force toward the concave portion 32 side. To approach.

  Thereby, the pinching force of the guide rail 14 by the guide member 15 in the width direction X of the linear guide device 13 is increased. As a result, a minute gap between both inner side surfaces 22 of the guide concave groove 20 of the guide member 15 and both side surfaces 19 of the guide rail 14 is slightly narrowed, and the guide rail 14 and the guide member 15 are separated from each other. The preload is adjusted so that the preload applied to the steel ball 24 increases.

  In the linear guide device 13 of the present embodiment, as indicated by the solid line B in the graph of FIG. 7, the preload (guide rail) applied to the steel ball 24 as the tightening force (tightening torque) of the cap bolt 16 is increased. 14), the sliding resistance of the guide member 15 via the steel ball 24 with respect to 14 is also increased.

  On the other hand, in the state where the guide member 15 has already been distorted and deformed so as to be pulled toward the concave portion 32 due to the tightening force of the cap bolt 16, the guide member 15 is moved to the table member 17 contrary to the above case. When the tightening force of the cap bolt 16 tightened to the side is weakened, the guide member 15 tries to return to the original shape before being deformed by deformation. For this reason, the amount of distortion deformation of the guide member 15 is reduced.

  Therefore, when the tightening force of the cap bolt 16 is weakened, both inner side surfaces 22 of the guide groove 20 of the guide member 15 are slightly displaced in a direction away from the both side surfaces 19 of the guide rail 14. As a result, a minute gap between both inner side surfaces 22 of the guide concave groove 20 of the guide member 15 and both side surfaces 19 of the guide rail 14 is slightly widened, and the guide rail 14 and the guide member 15 are separated from each other. The preload is adjusted so that the preload applied to the steel ball 24 becomes low.

  As described above, in the linear guide device 13 according to the present embodiment, when adjusting the preload applied to the steel ball 24, the inner bottom surface 26 of the mounting groove 25 of the table member 17 (the guide member 15 of the table member 17). The mounting surface) is not required to have high processing accuracy, and the entire linear guide device 13 is not required to be disassembled and assembled.

  That is, only by adjusting the tightening force of the cap bolt 16 inserted through each insertion hole 31 of the table member 17 and screwed into each screw hole 30 of the guide member 15, the guide rail is deformed based on the deformation of the guide member 15. The preload between 14 and the guide member 15 (preload applied to the steel ball 24) can be adjusted. Therefore, the preload between the guide rail 14 and the guide member 15 can be adjusted easily and quickly.

  In addition, when viewed from the longitudinal direction Y of the linear guide device 13, a recess 32 (space) is formed between the central axis of each insertion hole 31 and the side surface 19 closer to each insertion hole 31 out of both side surfaces 19 of the guide rail 14. When the portion K) does not exist and the concave portion 32 exists on the side farther from the side surface 19 than the central axis, both the inner side surfaces 22 of the guide groove 20 of the guide member 15 in the opposite direction to the above case. Is displaced.

  That is, both inner side surfaces 22 of the guide groove 20 of the guide member 15 are slightly displaced in a direction away from both side surfaces 19 of the guide rail 14 in accordance with distortion deformation due to the pulling force toward the concave portion 32 side. Thereby, the clamping force of the guide rail 14 by the guide member 15 in the width direction X of the linear guide device 13 is reduced. As a result, a minute gap between both inner side surfaces 22 of the guide concave groove 20 of the guide member 15 and both side surfaces 19 of the guide rail 14 is slightly widened, and the guide rail 14 and the guide member 15 are separated from each other. The preload is adjusted so that the preload applied to the steel ball 24 becomes low.

  On the other hand, in the state where the guide member 15 has already been distorted and deformed so as to be pulled toward the concave portion 32 due to the tightening force of the cap bolt 16, the guide member 15 is moved to the table member 17 contrary to the above case. When the tightening force of the cap bolt 16 tightened to the side is weakened, the guide member 15 tries to return to the original shape before being deformed by deformation. For this reason, the amount of distortion deformation of the guide member 15 is reduced.

  Therefore, when the tightening force of the cap bolt 16 is weakened, both inner side surfaces 22 of the guide groove 20 of the guide member 15 are slightly displaced in a direction approaching both side surfaces 19 of the guide rail 14. As a result, a minute gap between both inner side surfaces 22 of the guide concave groove 20 of the guide member 15 and both side surfaces 19 of the guide rail 14 is slightly narrowed, and the guide rail 14 and the guide member 15 are separated from each other. The preload is adjusted so that the preload applied to the steel ball 24 increases.

According to the embodiment detailed above, the following effects are exhibited.
(1) In the linear guide device 13, the guide member is simply adjusted by adjusting the tightening force of each cap bolt 16 inserted into each insertion hole 31 of the table member 17 and screwed into each screw hole 30 of the guide member 15. Based on the 15 deformation deformation, the preload between the guide rail 14 and the guide member 15, that is, the preload applied to the steel ball 24 can be adjusted. Therefore, the preload between the guide rail 14 and the guide member 15 can be adjusted easily and quickly.

  (2) The recessed portion 32 (space portion K) is connected to each insertion hole 31 from two directions of the longitudinal direction Y and the width direction X of the guide rail 14. For this reason, when the tightening force of the cap bolt 16 is increased and the guide member 15 is deformed and deformed, a moment is generated in the guide member 15 due to the resultant force of the pitching moment and the rolling moment. Therefore, by displacing both inner side surfaces 22 of the guide groove 20 of the guide member 15 with respect to both side surfaces 19 of the guide rail 14 in the moment direction due to such resultant force, a minute amount between the both inner side surfaces 22 and both side surfaces 19 is obtained. Can be adjusted effectively.

  (3) Since the table member 17 has four insertion holes 31 through which the cap bolts 16 are inserted, adjustment of the preload between the guide rail 14 and the guide member 15 is performed. It can be performed from four directions through adjustment of the tightening force of each cap bolt 16 inserted in the insertion hole 31 formed in the place. Therefore, the rattling of the guide member 15 with respect to the guide rail 14 can be suppressed more accurately than when the tightening force of the cap bolt 16 is adjusted only from one direction at one place.

  (4) The concave portion 32 is formed in the center portion in the width direction X perpendicular to the longitudinal direction Y in which the guide rail 14 extends on the inner bottom surface 26 side of the mounting groove 25 of the table member 17, and the insertion hole 31 is formed in the guide rail 14. Are formed at positions that are farther from the center position in the width direction X than both inner side surfaces 22 of the guide groove 20 of the guide member 15. For this reason, when the tightening force of the cap bolt 16 is increased, both inner side surfaces 22 of the guide groove 20 of the guide member 15 pinch the guide rail 14 from both sides in the width direction X against both side surfaces 19 of the guide rail 14 ( It is displaced so that it is pinched. Therefore, the adjustment of the preload between the guide rail 14 and the guide member 15 can be stably performed while suppressing the guide member 15 from being detached from the guide rail 14.

  (5) The space K is constituted by a recess 32 formed so as to be connected to the insertion hole 31 on the inner bottom surface 26 of the mounting groove 25 of the table member 17. For this reason, for example, as compared with the case where the space portion K connected to the insertion hole 31 is formed by sandwiching a spacer member or the like between the inner bottom surface 26 of the mounting groove 25 of the table member 17 and the upper surface 27 of the guide member 15. Since such a spacer member can be made unnecessary, an increase in the number of parts can be suppressed.

  (6) When each projection hole 31 is projected in the direction in which the cap bolt 16 is inserted, the entire insertion hole 31 overlaps the concave portion 32 (space portion K). For this reason, for example, when a part of the insertion hole 31 is projected in the insertion direction of the cap bolt 16, the guide member 15 is tightened by the tightening force of the cap bolt 16 compared to the case where it overlaps the recess 32 (space K). The amount of distortion deformation can be reduced.

(Example of change)
In addition, the said embodiment can also be changed and actualized as follows.
As shown in FIG. 8, the length in the longitudinal direction Y of each second recess 32 b in the table member 17 may be the same as the diameter of the insertion hole 31. That is, the recess 32 and the insertion hole 31 may be connected only from the width direction X. In this way, a rolling moment that rotates about the axis along the longitudinal direction Y is generated as the guide member 15 is distorted and deformed by the tightening force of the cap bolt 16. Therefore, by displacing both inner side surfaces 22 of the guide groove 20 of the guide member 15 with respect to both side surfaces 19 of the guide rail 14 in this rolling moment direction, a minute amount between the inner side surfaces 22 and the both side surfaces 19 can be obtained. The gap can be adjusted effectively.

  As shown in FIGS. 9A and 9B, each insertion hole 31 of the table member 17 has an inner half (part) in the width direction X of the recess 32 (when projected in the insertion direction of the cap bolt 16. You may make it overlap with space part K). In this way, when all the insertion holes 31 are projected in the insertion direction of the cap bolt 16, the guide member by the tightening force of the cap bolt 16 is compared with the case where it overlaps the recess 32 (space portion K). The amount of distortion deformation of 15 can be increased.

  The concave portion 32 of the table member 17 is omitted, and a space K (gap) having the same shape as the concave portion 32 is formed between the inner bottom surface 26 of the mounting groove 25 of the table member 17 and the upper surface 27 of the guide member 15. As shown, the spacer member may be sandwiched.

Each insertion hole 31 is not necessarily formed at a position farther from the center position in the width direction X than both inner side surfaces 22 of the guide groove 20 of the guide member 15.
The attachment of the guide member 15 to the table member 17 may be performed by tightening at one location of one cap bolt 16 inserted through one insertion hole 31 connected to the recess 32. In this case, the tightening position of one cap bolt 16 inserted into one insertion hole 31 connected to the recess 32 may be changed as appropriate.

  The attachment of the guide member 15 to the table member 17 may be performed by tightening at two locations with the cap bolt 16, tightening at three locations, or tightening at five or more locations. In this case, the tightening position of each cap bolt 16 inserted through each insertion hole 31 connected to the recess 32 may be changed as appropriate.

  DESCRIPTION OF SYMBOLS 11 ... Linear actuator apparatus, 13 ... Linear guide apparatus, 14 ... Guide rail, 15 ... Guide member, 16 ... Cap bolt as an example of a screw member, 17 ... Table member, 26 ... Inner bottom face which comprises a mounting surface, 27 ... Upper surface constituting the mounted surface, 18 ... Upper surface constituting the guide surface, 19 ... Side surface constituting the guide surface, 21 ... Inner bottom surface constituting the guided surface, 22 ... Inner side surface constituting the guided surface, 30 ... Screw hole, 31 ... insertion hole, 32 ... recessed part constituting space K, 35 ... cylinder hole constituting drive part, 36 ... packing constituting drive part, 37 ... piston constituting drive part, 38 ... drive part A piston rod, K, a space portion, X, a width direction, Y, a longitudinal direction.

Claims (8)

A guide rail,
A table member provided so as to be linearly movable along the guide rail;
The table member has a mounted surface facing the mounting surface located on the guide rail side and a guided surface facing the guide surface extending along the longitudinal direction of the guide rail, and the mounted surface is A guide that is attached to the table member so as to move along the guide rail together with the table member in a state of being opposed to the attachment surface and having a gap interposed between the guided surface and the guide surface. Members,
With
An insertion hole for inserting the screw member is formed so as to penetrate from the outer surface side of the table member to the mounting surface, and a screw hole for screwing the screw member is formed on the mounting surface of the guide member Further, in the state where the guide member is attached to the table member by the tightening force of the screw member inserted into the insertion hole and screwed into the screw hole, the attachment surface of the table member and the guide member A linear guide device characterized in that a space portion connected to the insertion hole is formed between the attached surface of the linear guide device.   The linear guide device according to claim 1, wherein the space portion is connected to the insertion hole from at least one direction including a width direction orthogonal to a longitudinal direction of the guide rail. The insertion hole is formed in the table member over a plurality of locations,
The linear guide device according to claim 1, wherein the screw member is inserted through each of the insertion holes. The space portion is formed at a central portion in a width direction orthogonal to a direction in which the guide rail extends on the mounting surface side of the table member,
The insertion hole is formed at a plurality of positions sandwiching the guide rail from both sides in the width direction and at a position farther from the center position in the width direction than the guided surface of the guide member. The linear guide device according to claim 3, wherein   The linear portion according to any one of claims 1 to 4, wherein the space portion is configured by a concave portion formed on the mounting surface of the table member so as to be connected to the insertion hole. Guide device.   6. The linear guide device according to claim 1, wherein the insertion hole entirely overlaps the space when projected in the insertion direction of the screw member.   6. The linear guide device according to claim 1, wherein a part of the insertion hole overlaps the space when projected in the insertion direction of the screw member. A linear guide device according to any one of claims 1 to 7,
A linear actuator device comprising: a drive unit that drives the table member.