JP2014194271A - Linear guide device - Google Patents

Abstract

Provided is an inexpensive linear guide device in which a connecting mechanism for rail parts constituting a guide rail does not require a space, and there is no step in a connecting part of the rail parts.
A plurality of rail parts 20 are arranged coaxially and in a straight line with their respective longitudinal end faces 20a facing each other, and are provided between the opposing longitudinal end faces 20a, 20a of the adjacent rail parts 20, 20. The straight guide rails 1 are configured by being connected by the connecting mechanism. This coupling mechanism is a fitting mechanism in which convex portions are fitted in and joined to the concave portions, and the concave portions 22 and 22 facing each other are formed on the opposing longitudinal end surfaces 20a and 20a of the adjacent rail parts 20 and 20, respectively. Provided by inserting and fitting both end portions of one pin 24 into both concave portions 22 and 22, respectively, adjacent rail components 20 and 20 are connected.
[Selection] Figure 3

Description

  The present invention relates to a linear guide device.

  The linear guide device includes a guide rail having a rolling element raceway surface extending in a longitudinal direction, a slider having a rolling element raceway surface facing the rolling element raceway surface of the guide rail, the rolling element raceway surface of the guide rail, and the rolling element of the slider. A plurality of rolling elements that are arranged so as to roll freely in rolling element rolling paths formed between the raceway surfaces. The slider is supported by the guide rail so as to be relatively movable in the longitudinal direction through rolling of the rolling elements.

The guide rail may be composed of a single member, but in the case of being long, the guide rail is composed of a plurality of parts connected in a straight line. For example, Patent Document 1 discloses a carriage driving rail that is connected by connecting a fixing member over a connecting portion of two rail parts and fixing the fixing member with a screw.
Further, for example, Patent Documents 2 and 3 disclose linear motion guide devices in which a protrusion is provided on one end surface of the guide rail and a hole that is fitted to the protrusion is provided on one end surface of the guide rail. Since the end surfaces of the guide rails are abutted and fixed by fitting the protrusions and the holes, it is possible to fix a plurality of guide rails as a single rail with high accuracy and a positional deviation exceeding the allowable range. Occurrence between the end surfaces of the guide rail can be prevented.

JP 11-294450 A JP 2005-233247 A Utility Model Registration No. 3121911

However, in the technique of Patent Document 1, since the fixing member is brought into contact with the outer surface of the rail part, a space for arranging the fixing member is required. For this reason, depending on the use and installation location of the linear guide device, there is a possibility that a space for arranging the fixing member cannot be obtained, and the installation of the linear guide device may be hindered.
Further, in the technique of Patent Document 1, the fixing member is arranged on the lower surface of the rail component so that a step in the vertical direction does not occur at the connecting portion of the rail component. However, the fixing member is a guide rail (rail component). Since there are very few applications that can be arranged on the lower surface of the film, the applications to which the technique of Patent Document 1 can be applied have been limited.
Furthermore, in order to prevent a step in the horizontal direction (horizontal direction) from occurring in the connecting part of the rail part, it is necessary to make the shape of the fixing member so as to be in contact with the side surface as well as the lower surface of the rail part. There is a possibility that the size of the fixing member is increased and the cost is increased.

In the techniques of Patent Documents 2 and 3, since the protrusion and the hole are formed integrally with the guide rail, the accuracy of the guide rail, such as the coaxiality and parallelism of the protrusion, the accuracy of the guide rail with respect to the hole, Accuracy such as coaxiality and parallelism, coaxiality between the protrusion and the hole, and fitting accuracy are required. Therefore, in the manufacture of the guide rail, there are cases where the number of processing steps increases and the manufacturing cost increases.
Therefore, the present invention solves the problems of the prior art as described above, and the connecting mechanism of the rail parts constituting the guide rail does not require a space, and there is no step in the connecting part of the rail parts and is inexpensive. It is an object to provide a linear guide device.

  In order to solve the above-described problems, an aspect of the present invention has the following configuration. That is, a linear guide device according to an aspect of the present invention includes a guide rail having a rolling element raceway surface extending in a longitudinal direction, a slider having a rolling element raceway surface facing the rolling element raceway surface of the guide rail, and the guide. A rolling element raceway surface of the rail and a rolling element raceway formed between the rolling element raceway surface of the slider, and a plurality of rolling elements that are freely rollable. A linear guide device supported by the guide rail so as to be relatively movable in the longitudinal direction via rolling, the guide rail comprising a plurality of rail parts arranged coaxially and connected in a straight line, A coupling mechanism for coupling the adjacent rail parts is provided between the opposing longitudinal end faces of the adjacent rail parts, and the coupling mechanism is a fitting mechanism for fitting the convex portions into the concave portions and joining them. There are recesses facing each other on opposite longitudinal end faces of the adjacent rail parts, and both end portions of one connecting member whose both end portions are convex portions are inserted and fitted into the both recess portions, respectively. By this, it is a mechanism which connects the said rail components which adjoin.

  In this linear guide device, the coupling mechanism is provided with a plurality of concave portions on the opposing longitudinal end surfaces of the adjacent rail parts, respectively, and the plurality of concave portions on one longitudinal end surface are provided with a plurality of concave portions on the other longitudinal end surface. A mechanism for connecting adjacent rail parts by inserting and fitting both ends of the plurality of connecting members facing the recesses and the opposite recesses may be used.

In addition, the coupling mechanism is provided with two concave portions arranged side by side on opposite longitudinal end surfaces of the adjacent rail parts, and two concave portions on one longitudinal end surface are formed on two concave portions on the other longitudinal end surface. It may be a mechanism that connects the adjacent rail parts by inserting and fitting both ends of the two connecting members into the opposing concave portions.
Further, the coupling mechanism is provided with two concave portions arranged vertically on opposite longitudinal end surfaces of the adjacent rail parts, and two concave portions on one longitudinal end surface are formed on two concave portions on the other longitudinal end surface. It may be a mechanism that connects the adjacent rail parts by inserting and fitting both ends of the two connecting members into the opposing concave portions.

In this linear guide device, the connecting member may be a pin. Further, the pin may be a taper pin. Furthermore, the taper pin may be a taper pin with an external thread, or a double-sided taper pin.
Furthermore, in this linear guide device, the connection mechanism may include an exhaust mechanism that discharges the gas in the recess to the outside of the recess when the protrusion is fitted into the recess. Furthermore, in this linear guide device, the connecting member may include the exhaust mechanism. The connecting member including the exhaust mechanism may be a spring pin.

Further, in this linear guide device, the connecting mechanism is provided with key grooves facing each other as the recesses on the opposing longitudinal end faces of the adjacent rail parts, and both ends of one key as the connecting member. May be a mechanism for connecting adjacent rail parts by inserting and fitting them into the both key grooves.
Further, in this linear guide device, the coupling mechanism has a concave portion having a vertical reference plane and a horizontal reference plane on the opposing longitudinal end faces of the adjacent rail parts so as to face each other. In the concave portion, a connecting jig having a substantially rectangular parallelepiped fixing member as the convex portion and a pair of pressing members which are spread on the upper surface of the fixing member in the left-right direction by a wedge is disposed. And a mechanism for connecting the adjacent rail parts by pressing the wedge against the upper and lower reference surfaces of the recess.

  In the linear guide device of the present invention, a plurality of rail parts constituting a guide rail are connected by a connecting mechanism provided between opposing longitudinal end surfaces of adjacent rail parts, and this connecting mechanism is a convex part. Therefore, the connecting mechanism does not require a space, and there are almost no steps in the connecting part of the rail parts. Moreover, since the connection mechanism as described above is provided, the linear guide device of the present invention is inexpensive.

It is a perspective view which shows the structure of the linear guide apparatus of 1st embodiment. It is the front view which looked at the linear guide apparatus of FIG. 1 from the longitudinal direction. It is a figure explaining the connection mechanism of the linear guide apparatus of FIG. It is a figure which shows the structure of the linear guide apparatus of 2nd embodiment, (a) is a figure explaining that the two recessed parts are provided symmetrically in the rail component end surface, (b) is a linear guide apparatus. (C) is a figure explaining the connection mechanism of a linear guide apparatus. It is a figure which shows the structure of the linear guide apparatus of 2nd embodiment, (a) is a figure explaining that two recessed parts are provided in the rail component end surface symmetrically up and down, (b) is a linear guide apparatus. (C) is a figure explaining the connection mechanism of a linear guide apparatus. It is a figure which shows the structure of the linear guide apparatus of 3rd embodiment, (a) is a figure explaining the connection mechanism of the linear guide apparatus of FIG. 1, (b)-(d) is a figure which shows the example of a taper pin. It is. It is the front view and end view which show an example of the positioning pin with an air vent. It is the front view and end elevation which show the other example of the positioning pin with an air vent. It is the front view and end elevation which show an example of a spring pin. It is the front view and end view which show the other example of a spring pin. It is a figure which shows the structure of the linear guide apparatus of 5th embodiment. It is a figure which shows the 1st modification of 5th embodiment. It is a figure which shows the 2nd modification of 5th embodiment. It is a figure which shows the 3rd modification of 5th embodiment. It is a figure which shows the 4th modification of 5th embodiment. It is a figure which shows the structure of the linear guide apparatus of 6th embodiment, (a) is a top view of a rail component, (b) is a front view of a rail component. It is a figure which shows the structure of the linear guide apparatus of 6th embodiment, (a) is a top view explaining the structure of a connection jig, (b) is a front view explaining the structure of a connection jig, (c) is It is a side view explaining the structure of a connection jig. It is a figure which shows the structure of the linear guide apparatus of 6th embodiment, (a) is a front view explaining a connection mechanism, (b) is a fragmentary sectional view explaining a connection mechanism.

An embodiment of a linear guide device according to the present invention will be described in detail with reference to the drawings. [First embodiment]
FIG. 1 is a perspective view showing the structure of a first embodiment of a linear guide device according to the present invention. FIG. 2 is a front view of the linear guide device of FIG. 1 as viewed from the longitudinal direction (however, the end cap is omitted). Further, FIG. 3 is a view for explaining a coupling mechanism of rail parts of the linear guide device of FIG.
In these drawings, the same or corresponding parts are denoted by the same reference numerals. Further, in the following description, “cross section” means a cross section when cut along a plane orthogonal to the longitudinal direction unless otherwise specified. Furthermore, the terms indicating directions such as up, down, left, and right in the following description mean the directions in FIG. 2 for convenience of description unless otherwise specified.

  A slider 2 is supported on a substantially square guide rail 1 extending in the longitudinal direction so as to be relatively movable in the longitudinal direction. The guide rail 1 has four outer surfaces extending in the longitudinal direction in addition to both end surfaces in the longitudinal direction. Of the four outer surfaces, the guide rail 1 has a longitudinal portion on the ridge where the upper surface 1b intersects the left and right side surfaces 1a and 1a. Rolling element rolling grooves (corresponding to the rolling element raceway surface, which is a constituent element of the present invention) 10 and 10, which are concave grooves having a substantially arc-shaped cross section extending in the direction, are formed. Further, rolling element rolling grooves 10, 10 formed of concave grooves having a substantially ½ arc shape (semi-circular shape) in cross section extending in the longitudinal direction are formed at the middle positions in the vertical direction of the left and right side surfaces 1 a, 1 a of the guide rail 1. Has been. Further, the guide rail 1 is formed with a plurality of mounting holes 4 and 4 penetrating from the upper surface 1b to the lower surface.

  The slider 2 includes a flat plate portion 7 along the upper surface 1b of the four outer surfaces of the guide rail 1, and two arm portions 6 and 6 extending downward from the left and right side portions of the flat plate portion 7 along the side surface 1a. It consists of The angle formed by the flat plate portion 7 and the arm portions 6 and 6 is a right angle, and the cross-sectional shape of the slider 2 is formed along the upper surface 1b of the guide rail 1 and the left and right side surfaces 1a and 1a. The slider 2 is assembled on the guide rail 1 so as to be relatively movable so that the guide rail 1 is sandwiched between the arms 6 and 6.

  Such a slider 2 includes a slider body 2A and end caps 2B and 2B that are detachably attached to both ends in the longitudinal direction. Furthermore, side seals 5 and 5 are provided at both ends of the slider 2 in the longitudinal direction (end surfaces of the end caps 2B), and seal the openings facing in the longitudinal direction among the openings of the gap between the guide rail 1 and the slider 2. Is installed. Further, an under seal 8 is attached to the lower part of the slider 2 to seal the downward opening portion of the opening portion of the gap between the guide rail 1 and the slider 2. The side seals 5 and 5 and the under seal 8 prevent foreign matter from entering the gap from the outside and preventing the lubricant from flowing out from the gap.

Further, at the corners of the inner side surfaces of the left and right arms 6 and 6 of the slider body 2A and the central portion in the vertical direction, the cross section of the guide rail 1 facing the rolling element rolling grooves 10, 10, 10, 10 is approximately 1 /. Two arc-shaped (semi-circular) rolling element rolling grooves 11, 11, 11, 11 (corresponding to the rolling element raceway surface which is a constituent element of the present invention) are formed. And between the rolling element rolling grooves 10, 10, 10, 10 of the guide rail 1 and the rolling element rolling grooves 11, 11, 11, 11 of the slider 2, the rolling element rolling path 14, having a substantially circular cross section, 14, 14 and 14 are formed, and these rolling element rolling paths 14 extend in the longitudinal direction. The number of rolling element rolling grooves 10 and 11 provided in the guide rail 1 and the slider 2 is not limited to two rows on one side, and may be one row on one side or three rows or more, for example.
Furthermore, the slider 2 is a straight path comprising a through hole penetrating in the longitudinal direction in parallel with the rolling element rolling path 14 at the upper and lower portions of the thick portions of the left and right arms 6 and 6 of the slider body 2A. 13, 13, 13, 13.

  On the other hand, the end cap 2B is made of, for example, an injection molded product of a resin material, and communicates the rolling element rolling path 14 and the linear path 13 parallel to the rolling element rolling path 14 on the left and right sides of the contact surface (back surface) with the slider body 2A. It has a half-doughnut-shaped curved path up and down. The straight path 13 and the curved paths at both ends constitute a rolling element return path that feeds and circulates the rolling element 3 from the end point of the rolling element rolling path 14 to the starting point (the rolling element return path is a rolling element rolling path). The rolling element return path and the rolling element rolling path 14 form a substantially annular rolling element circulation path. The substantially annular rolling element circulation path is formed on both the left and right sides with the guide rail 1 interposed therebetween. In this rolling element circulation path, a large number of rolling elements 3 made of, for example, steel balls are slidably loaded, and the slider 2 extends along the guide rail 1 through the rolling of these rolling elements 3. It moves relative to the direction.

  When the slider 2 assembled to the guide rail 1 is moved in the longitudinal direction along the guide rail 1, the rolling element 3 loaded in the rolling element rolling path 14 rolls in the rolling element rolling path 14. However, it moves in the same direction as the slider 2 with respect to the guide rail 1. When the rolling element 3 reaches the end point of the rolling element rolling path 14, the rolling element 3 is scooped up from the rolling element rolling path 14 by the tongue portion (scooping part) provided in the end cap 2 </ b> B and sent to the curved path. The rolling element 3 that has entered the curved path makes a U-turn and is introduced into the straight path 13, and reaches the opposite curved path through the straight path 13. Here, the rolling element 3 makes a U-turn again and returns to the starting point of the rolling element rolling path 14 and repeats the circulation in the rolling element circulation path infinitely.

  In such a linear guide device, the guide rail 1 is formed by connecting a plurality of rail components 20. That is, a plurality of substantially rod-shaped rail components 20 are arranged coaxially and in a straight line with the respective longitudinal end surfaces 20a facing each other, and are provided between the opposing longitudinal end surfaces 20a, 20a of the adjacent rail components 20, 20. The adjacent rail parts 20 and 20 are connected by the connecting mechanism to form a straight guide rail 1.

This coupling mechanism is a fitting mechanism that fits the convex portion into the concave portion and joins them. An example of the fitting mechanism will be described with reference to FIG.
Concave portions 22 are provided on both end surfaces 20 a in the longitudinal direction of each rail component 20. When the longitudinal end surfaces 20a, 20a of the two rail components 20, 20 are opposed to each other so that the outer edges thereof coincide with each other, the positions of the recesses 22, 22 coincide with each other. Then, one end of one pin 24 is inserted and fitted into the recess 22 of one rail component 20, and the other end of the pin 24 is connected to the other rail until the opposing longitudinal end surfaces 20a, 20a contact each other. If it inserts and fits into the recessed part 22 of the component 20, the two rail components 20 and 20 will be connected. In addition, the recessed part 22 provided in the longitudinal direction end surface 20a of the rail component 20 corresponds to the recessed part of the connecting mechanism that is a constituent element of the present invention, and the pin 24 corresponds to the connecting member that is a constituent element of the present invention. The end portion of the pin 24 corresponds to the convex portion of the coupling mechanism that is a constituent feature of the present invention.

  This coupling mechanism is provided between the opposing longitudinal end surfaces 20a, 20a of the adjacent rail parts 20, 20, and does not require a space for the coupling mechanism. There are almost no restrictions. Moreover, since it can connect in the state which made the outer edge of adjacent rail components 20 and 20 correspond substantially completely, a level | step difference hardly arises in the connection part of adjacent rail components 20 and 20. FIG. Furthermore, since no special member is required for the connection mechanism, a commercially available general pin (for example, a knock pin) can be used, so that the connection mechanism can be configured at a low cost. The guide device is inexpensive.

Furthermore, since the rail parts 20 and 20 can be connected only by inserting and fitting the pins 24 into the recesses 22 and 22 of the longitudinal end faces 20a and 20a, it is influenced by the skill level and experience of the connecting operator. The connecting operation can be performed easily, reliably, stably, accurately, and efficiently.
Furthermore, since the convex part (connecting member (pin 24)) which comprises a connection mechanism is a different body from the rail component 20, accuracy, such as a position degree, parallelism, etc. of the rail component 20 (guide rail 1) with respect to the recessed part 22, Although the fitting accuracy of the recess 22 and the pin 24 is necessary, the accuracy of the coaxiality, parallelism, etc. of the rail part 20 (guide rail 1) with respect to the convex portion constituting the coupling mechanism, and the convex portion constituting the coupling mechanism Accuracy such as the degree of coaxiality and position of the recess 22 is not required. Therefore, in manufacturing the guide rail 1, the number of processing steps is reduced and the manufacturing cost is reduced.

  Here, an example of the pin 24 is shown. In the present embodiment, a cylindrical (straight type) metal pin can be used. If the outer peripheral surface is finished with high accuracy by polishing or the like and the tolerance of the outer dimension is 5 μm or less and the processing accuracy of the recess 22 is 5 μm or less (for example, any outer surface of the rail component 20) If the diameter of the recess 22 is processed within a tolerance of 0.05 on the basis of the above, the amount of displacement of the connected rail parts 20 and 20 (that is, the step of the connecting portion) can be 5 μm or less. Further, if a high-precision pin having an outer dimension tolerance of 2 μm or less is used, the amount of displacement of the connected rail parts 20 and 20 can be further reduced.

In this connection mechanism, the amount of deviation between the adjacent rail parts 20 and 20 is determined by the positional accuracy of the recess 22, so that it is easily, reliably, and stable without being affected by the skill level and experience of the connection operator. In addition, the connecting operation can be performed with high accuracy and efficiency.
In addition, this embodiment shows an example of this invention and this invention is not limited to this embodiment. For example, the rail parts 20 are preferably all of the same shape, but their longitudinal lengths may be different as long as the cross-sectional shape and size are the same. Further, the inner shape of the recess 22 is preferably a cylindrical shape, but a conical shape, a prismatic shape, a pyramid shape, a hemispherical shape, or the like can also be adopted. Furthermore, the shape of the pin 24 may be a shape corresponding to the shape of the recess 22, and examples thereof include a cylindrical shape and a prismatic shape. In addition, it is also possible to use the pin 24 of a taper shape, and it is preferable that the inner surface shape of the recessed part 22 in that case is a column shape or a taper shape.

Furthermore, in the linear guide device of the present embodiment, the rail component 20 having the recesses 22 and 22 on the longitudinal end surfaces 20a and 20a is manufactured, and the pins 24 are inserted and fitted into the recesses 22 of the rail component 20. The rail parts 20 and 20 are connected by the above, but the present invention is not limited to this embodiment.
For example, a rail component having a concave portion on one end surface in one longitudinal direction and a convex portion fitted on the concave portion on both end surfaces in the other longitudinal direction is manufactured, and the convex portion of one rail component is formed on the other rail component. The rail parts may be connected by inserting and fitting into the recesses.
Alternatively, a first rail component having recesses on both end surfaces in the longitudinal direction and a second rail component having projections fitted on the recesses in the first rail component on both end surfaces in the longitudinal direction are manufactured. The rail parts may be connected by inserting and fitting the convex parts of the rail parts into the concave parts of the first rail part.

Further, the material of the pin 24 is not particularly limited, but is preferably the same material as that of the guide rail 1 (rail component 20). If the material is different, the natural frequency varies depending on the material, so that resonance occurs and the pin 24 may be detached from the guide rail 1.
The material of the guide rail 1 (rail component 20) and the pin 24 is carbon steel for mechanical structure, chromium steel, chromium molybdenum steel, nickel chromium steel, nickel chromium molybdenum steel, carbon tool steel, high speed tool steel, alloy tool steel. Steels such as stainless steel and bearing steel, and resins such as plastics and elastomers.

Specific examples of the plastic include polycarbonate (PC), polyethylene terephthalate (PET), polyacetal (POM), polytetrafluoroethylene (PTFE), polyether ether ketone (PEEK), phenol resin (PF), which have high mechanical strength, Examples thereof include an epoxy resin (EP). Since the pin 24 and the concave portion 22 become high temperature due to friction and creep may occur in the pin 24, polyacetal is preferable in consideration of creep resistance.
Specific examples of the elastomer include olefin, styrene, vinyl chloride, polyester, polyurethane, and polyamide elastomers. Since the pin 24 and the recess 22 may be heated to high temperatures due to friction, a polyamide-based elastomer having excellent heat resistance is preferable in consideration of thermal stability.

[Second Embodiment]
The linear guide device of the second embodiment will be described in detail with reference to FIGS. (A) of FIG. 4 is a figure explaining that the two recessed parts are provided in the rail component end surface symmetrically. FIG. 4B illustrates a fitting mechanism of the linear guide device. (C) of FIG. 4 is a figure explaining the connection mechanism of a linear guide apparatus.
In addition, since the structure and effect | action of the linear guide apparatus of 2nd embodiment are substantially the same as 1st embodiment, only a different part is demonstrated and description of the same part is abbreviate | omitted.

As shown in FIG. 4 (a), two recesses 22 are symmetrically formed on both end surfaces 20a in the longitudinal direction of each rail component 20 with the z axis indicating the vertical direction of both end surfaces 20a in the longitudinal direction as the center axis. Are arranged side by side. As shown in FIG. 4B, one end portions of the two pins 24 are inserted into and fitted into the two concave portions 22 provided in one rail component 20, respectively.
And as shown in FIG.4 (c), the longitudinal direction both end surfaces 20a of the two rail components 20 are made to oppose, and the outer edges of the opposing longitudinal direction both end surfaces 20a and 20a are made to correspond. Then, since the two recessed parts 22 of the longitudinal direction end surface 20a of one rail component 20 oppose the two recessed parts 22 of the longitudinal direction end surface of the other rail part 20, the opposing longitudinal direction both end surfaces 20a and 20a contact. Until the other end of the pin 24 is inserted into the recess 22 of the other rail part 20 and fitted, the two rail parts 20 and 20 are connected.

Moreover, you may make it like the modification shown in FIG. (A) of FIG. 5 is a figure explaining that two recessed parts are provided in the rail component end surface symmetrically up and down. (B) of FIG. 5 is a figure explaining the fitting mechanism of a linear guide apparatus. (C) of FIG. 5 is a figure explaining the connection mechanism of a linear guide apparatus.
That is, as shown in FIG. 5A, the two longitudinally opposite end surfaces 20a of each rail component 20 have two concave portions 22 symmetrically in the vertical direction with the y axis indicating the left and right direction of the longitudinal direction both end surfaces 20a as the central axis. Are arranged side by side. As shown in FIG. 5B, one end portions of the two pins 24 are inserted into and fitted into the two concave portions 22 provided in one rail component 20, respectively.

Then, as shown in FIG. 5C, the longitudinal end surfaces 20a of the two rail parts 20 are opposed to each other, and the outer edges of the opposing longitudinal end surfaces 20a, 20a are made to coincide. Then, since the two recessed parts 22 of the longitudinal direction end surface 20a of one rail component 20 oppose the two recessed parts 22 of the longitudinal direction end surface of the other rail part 20, the opposing longitudinal direction both end surfaces 20a and 20a contact. Until the other end of the pin 24 is inserted into the recess 22 of the other rail part 20 and fitted, the two rail parts 20 and 20 are connected.
In addition, the number of the recessed parts 22 provided in the longitudinal direction end surface 20a of the rail component 20 is not limited to two shown to (a) of FIG. 4, and (a) of FIG. It may be. Moreover, the two recessed parts 22 provided in the longitudinal direction end surface 20a of the rail component 20 may be provided left-right and up-down asymmetrically.

[Third embodiment]
The linear guide device of the third embodiment will be described in detail with reference to FIGS. FIG. 6 is a view for explaining a coupling mechanism of rail parts of the linear guide device of FIG. In addition, since the structure and effect | action of the linear guide apparatus of 3rd embodiment are substantially the same as 1st embodiment, only a different part is demonstrated and description of the same part is abbreviate | omitted.
The connection mechanism is the same as in the first embodiment, but in the third embodiment, a conical taper pin can be used as a connection member (pin) of the connection mechanism (see FIG. 6B). .

  The smaller the dimensional difference between the recess 22 of the rail component 20 and the pin as the connecting member, the smaller the amount of deviation between the rail components 20, 20, but at the same time the pin is less likely to enter the recess 22. In the present embodiment, the taper pin 24a having a thin tip (small diameter) with respect to the size of the recess 22 is used, and the taper pin 24a can be easily inserted into the recess 22, so that the rail connection work can be performed efficiently. .

In this connection mechanism, the amount of deviation between the adjacent rail parts 20 and 20 is determined by the accuracy of the pin 24, so that it is easily, reliably, and stably without being affected by the skill level and experience of the connection operator. Therefore, the connecting operation can be performed with high accuracy and efficiency.
In addition, you may use the taper pin 24b with an external screw instead of the taper pin 24a as a connection member (pin) of a connection mechanism (refer (c) of FIG. 6). A pin as a connecting member is easily fixed to the rail component 20 by screwing the screw portion 25 (male screw) of the taper pin 24b with an external screw into the female screw formed in the recess 22 of one rail component 20. Can do. Further, since a commercially available inexpensive taper pin with an external screw can be used, the coupling mechanism can be configured at a low cost.

  Moreover, you may use the both-sides taper pin 24c instead of the taper pin 24a as a connection member (pin) of a connection mechanism (refer (d) of FIG. 6). Since both side taper pins 24c are narrower (smaller diameters) at both ends in the longitudinal direction than the middle part in the longitudinal direction, the pins can be easily inserted into the respective recesses 22 of the rail components 20 to be connected. Therefore, the rail connection work can be performed more efficiently.

[Fourth embodiment]
A linear guide device according to a fourth embodiment will be described in detail with reference to FIGS. 7-10 is a figure explaining the connection mechanism of the rail components of the linear guide apparatus of FIG. In addition, since the structure and effect | action of the linear guide apparatus of 3rd embodiment are substantially the same as 1st embodiment, only a different part is demonstrated and description of the same part is abbreviate | omitted.
In the linear guide device according to the third embodiment, the coupling mechanism includes an exhaust mechanism that discharges the gas in the recess 22 to the outside of the recess 22 when the end of the pin 24 is fitted into the recess 22.
The smaller the dimensional difference (diameter difference) between the end of the pin 24 and the recess 22 is, the smaller the amount of displacement of the connected rail parts 20 and 20 (that is, the step of the connecting portion) is, but the end of the pin 24 is not connected to the recess 22. Since the gas (air) in the concave portion 22 is difficult to escape out of the concave portion 22 when fitted into the concave portion 22, it is difficult to fit the end portion of the pin 24 into the concave portion 22. Therefore, it becomes difficult to smoothly and efficiently perform the connecting operation of the rail component 20.

  However, in the linear guide device of the present embodiment, the coupling mechanism includes an exhaust mechanism that exhausts the gas in the recess 22 to the outside of the recess 22 when the end of the pin 24 is fitted into the recess 22. When the end of 24 is fitted into the recess 22, the gas in the recess 22 easily escapes out of the recess 22, and the end of the pin 24 is easily fitted into the recess 22. Therefore, the connecting operation of the rail component 20 can be performed smoothly and efficiently, and the linear guide device of this embodiment is easy to manufacture.

  As an example of the exhaust mechanism, one using a positioning pin with an air vent shown in FIGS. The pin 24 in FIG. 7 includes a vent hole 31 penetrating between both end faces as an air vent. When the end of the pin 24 is fitted into the recess 22, the air in the recess 22 is discharged outside the recess 22 through the through-hole 31, so that the end of the pin 24 is easily fitted into the recess 22. Further, when the end portion of the pin 24 is extracted from the recess 22, it is easy to extract.

  The pin 24 of FIG. 8 has a part of the outer peripheral part cut away, and a part of the cylindrical surface is a rectangular flat surface 32 formed between both end faces. When such an end of the pin 24 is fitted into the recess 22, a space is formed between the inner peripheral surface of the recess 22 and the flat surface 32 of the pin 24, and this space functions as an air vent. Therefore, when the end of the pin 24 is fitted into the recess 22, the air in the recess 22 is discharged outside the recess 22 through the space, so that the end of the pin 24 is easily fitted into the recess 22. Further, when the end portion of the pin 24 is extracted from the recess 22, it is easy to extract. Instead of the flat surface 32, a groove extending between both end surfaces may be formed on the outer peripheral surface of the pin 24.

  Thus, although an exhaust mechanism can be configured by using a commercially available positioning pin with an air vent, the exhaust mechanism can also be configured by using a spring pin instead of the positioning pin with an air vent. The spring pin is a hollow tube obtained by rounding a plate having elasticity into a cylindrical shape, and has a slit extending in the longitudinal direction at one place on the circumference, and a cross section cut in a C-shaped section (a plane cut perpendicular to the longitudinal direction). ). Since the spring pin is tubular, it has an air vent as in the pin 24 having the through hole 31 in FIG.

Examples of spring pins are shown in FIGS. The shape of the slit may be a straight line as shown in FIG. 9 or a wavy line as shown in FIG.
Moreover, the material which comprises a spring pin is not specifically limited, For example, stainless steel (for example, austenitic stainless steel and martensitic stainless steel), carbon steel, copper, and aluminum are mention | raise | lifted.
Furthermore, if a spring pin is used, even if the two connected rail parts 20 are displaced and a step is generated in the connection portion, the displacement is returned by the elasticity of the spring pin, and the step in the connection portion is easily eliminated.

In addition, this embodiment shows an example of this invention and this invention is not limited to this embodiment. For example, in the linear guide device of the present embodiment, the rail component 20 having the recesses 22 and 22 on the longitudinal end surfaces 20a and 20a is manufactured, and the pin 24 is inserted and fitted into the recess 22 of the rail component 20. The rail parts 20 and 20 are connected by the above, but the present invention is not limited to this embodiment.
For example, a rail component having a concave portion on one end surface in one longitudinal direction and a convex portion fitted on the concave portion on both end surfaces in the other longitudinal direction is manufactured, and the convex portion of one rail component is formed on the other rail component. The rail parts may be connected by inserting and fitting into the recesses.

Alternatively, a first rail component having recesses on both end surfaces in the longitudinal direction and a second rail component having projections fitted on the recesses in the first rail component on both end surfaces in the longitudinal direction are manufactured. The rail parts may be connected by inserting and fitting the convex parts of the rail parts into the concave parts of the first rail part.
In this case, an exhaust mechanism is configured by forming a flat surface similar to the pin shown in FIG. 8 or a groove extending between both end surfaces in the outer peripheral portion of the convex portion formed on the end surface in the longitudinal direction of the rail component. do it.

[Fifth embodiment]
The linear guide device according to the fifth embodiment will be described in detail with reference to FIGS. FIG. 11 is a diagram illustrating the structure of the linear guide device according to the fifth embodiment. In addition, since the structure and effect | action of the linear guide apparatus of 5th embodiment are substantially the same as 1st embodiment, only a different part is demonstrated and description of the same part is abbreviate | omitted.
A key groove 41 as a recess of the coupling mechanism is provided on both end surfaces 20 a in the longitudinal direction of each rail component 20 from the upper surface to the lower surface of the rail component 20. When the longitudinal end surfaces 20a, 20a of the two rail parts 20, 20 are opposed to each other so that the outer edges thereof coincide with each other, the positions of the key grooves 41, 41 coincide with each other. Moreover, the opposing longitudinal direction both end surfaces 20a and 20a contact.

And if one end part of one key 40 which is a connection member is inserted in the keyway 41 of one rail component 20, and it fits in the left-right direction, the two rail components 20 and 20 will be connected. Thereafter, the bolt 42 is inserted into the bolt hole 43 provided in the rail component 20 to fix the rail component 20.
Further, interference is provided between the key grooves 41 and 41 and the key 40 of the longitudinal end faces 20a and 20a. Therefore, since the rail parts 20 and 20 can be connected only by inserting and fitting the key 40 into the key groove 41, it is easy and reliable without being influenced by the skill level and experience of the connecting operator. In addition, the connecting operation can be performed stably, accurately, and efficiently.

  Further, by stocking the rail component 20 having the longitudinal end surface 20a provided with the key groove 41 for fitting the key 40, the rail component 20 can be delivered to the customer or the like in a short delivery time without processing the rail component 20. Can be provided. Of course, in the first to fourth embodiments, if the rail component 20 having the longitudinal end surface 20a provided with the recess 22 into which the pin 24 is inserted is stocked, the rail component 20 is processed in the same manner as described above. Therefore, the rail component 20 can be provided to the customer or the like with a short delivery time.

  In addition, this embodiment shows an example of this invention and this invention is not limited to this embodiment. For example, as in the first modification shown in FIG. 12, the pin 24 may be used together with the key 40 as a connecting member. That is, a key groove 41 for the key 40 and a recess 22 for the pin 24 may be provided on the longitudinal end surface 20 a of the rail component 20, and the rail component 20 may be connected by the key 40 and the pin 24.

Further, the material of the key 40 is not particularly limited, but is preferably the same material as that of the guide rail 1 (rail component 20). If the material is different, the natural frequency varies depending on the material, so that resonance occurs and the key 40 may be detached from the guide rail 1.
The material of the guide rail 1 (rail component 20) and the key 40 is carbon steel for machine structure, chromium steel, chromium molybdenum steel, nickel chromium steel, nickel chromium molybdenum steel, carbon tool steel, high speed tool steel, alloy tool steel. Steels such as stainless steel and bearing steel, and resins such as plastics and elastomers.

  Specific examples of the plastic include polycarbonate (PC), polyethylene terephthalate (PET), polyacetal (POM), polytetrafluoroethylene (PTFE), polyether ether ketone (PEEK), phenol resin (PF), which have high mechanical strength, Examples thereof include an epoxy resin (EP). Since the key 40 and the key groove 41 become high temperature due to friction and the key 40 may be creeped, polyacetal is preferable in consideration of creep resistance.

Specific examples of the elastomer include olefin, styrene, vinyl chloride, polyester, polyurethane, and polyamide elastomers. Since the key 40 and the key groove 41 may be heated to high temperatures due to friction, a polyamide-based elastomer having excellent heat resistance is preferable in consideration of thermal stability.
Further, the type of the key 40 is not particularly limited, and a sink key, a sliding key, a half moon key, a tangent key, and the like can be used. In order to perform the connecting work efficiently, the key 40 is preferably a sink key.

(Second modification of the fifth embodiment)
Here, a modification in the case where a parallel key is used as the key 40 will be described. FIG. 13A is a partial cross-sectional view showing the structure of the linear guide device of the second modification, and FIG. 13B is a view of the key 40 and the key groove 41 as viewed from the lower surface side of the guide rail 1 (FIG. 13A is a view of the key 40 and the key groove 41 as viewed from the end in the longitudinal direction (the direction of the arrow B in FIG. 13A). Figure seen from).
The keyway 41 is formed so as to open on the longitudinal end surface 20 a and the lower surface of the rail component 20. The keys 40 inserted into these key grooves 41 and 41 are fitted in the key grooves 41 and 41 in the width direction of the guide rail 1 (see FIG. 13C), but in the longitudinal direction. A gap is provided on both sides in the longitudinal direction of the key 40 (see FIG. 13B).

If the key 40 is not fitted in the key grooves 41 and 41 in the width direction of the guide rail 1, it will occur when the slider 2 moving on the guide rail 1 passes through the joint (connecting portion) of the rail component 20. Due to the vibration, the rail component 20 may be displaced in the width direction of the guide rail 1, and a step may be generated in the connecting portion. Further, the key groove 41 is expanded by heat generated from the traveling slider 2, and the rail component 20 may be displaced in the width direction of the guide rail 1. If there are no gaps on both sides in the width direction of the guide rail 1 and gaps are provided on both sides in the longitudinal direction, it is possible to prevent the above-described inconvenience from occurring.
As in the first modification shown in FIG. 12, the pin 24 may be used together with the key 40 as a connecting member in the second modification of the fifth embodiment. That is, a key groove 41 for the key 40 and a recess 22 for the pin 24 may be provided on the longitudinal end surface 20 a of the rail component 20, and the rail component 20 may be connected by the key 40 and the pin 24.

(Third modification of the fifth embodiment)
Next, a modified example in which a half moon key is used as the key 40 will be described with reference to FIG.
The keyway 41 has a shape corresponding to the shape of the half-moon key 40 and is formed so as to open on the longitudinal end surface 20 a and the lower surface of the rail component 20. In a state where the half-moon key 40 is inserted into the key groove 41, the arc surface of the half-moon key 40 contacts the bottom surface of the key groove 41, and the plane of the half-moon key 40 (a plane facing the arc surface) is exposed from the key groove 41. However, this plane and the lower surface of the rail component 20 form the same surface.

However, if the half-moon key 40 is sized so that the plane of the half-moon key 40 and the lower surface of the rail part 20 are flush with each other, the half-moon key 40 is expanded when the half-moon key 40 expands due to heat generated from the traveling slider 2. There is a possibility that inconvenience that 40 protrudes from the keyway 41 may occur. Therefore, it is more preferable to use a half-moon key having a dimension such that the plane is not flush with the lower surface of the rail component 20 and is located inside the keyway 41.
Note that, similarly to the first modification shown in FIG. 12, in the third modification of the fifth embodiment, the pin 24 may be used together with the key 40 as the connecting member. That is, a key groove 41 for the key 40 and a recess 22 for the pin 24 may be provided on the longitudinal end surface 20 a of the rail component 20, and the rail component 20 may be connected by the key 40 and the pin 24.

(Fourth modification of the fifth embodiment)
Next, a modification example in which a parallel pin is used as the key 40 will be described. 15A is a partial cross-sectional view showing the structure of the linear guide device of the fourth modification, and FIG. 15B is a view of the key 40 and the key groove 41 as viewed from the lower surface side of the guide rail 1 (FIG. 15). 15 (a) viewed from the direction of arrow C in (a), (c) is a view of the key 40 and the key groove 41 from the end in the longitudinal direction (direction of arrow D in FIG. 15 (a)). Figure seen from). In addition, the kind of parallel pin may have a circular cross-sectional shape or may have an elliptical shape.

  The keyway 41 is formed so as to open on the longitudinal end surface 20 a and the lower surface of the rail component 20. The keys 40 (parallel pins) inserted into the key grooves 41 and 41 are fitted in the key grooves 41 and 41 in the width direction of the guide rail 1 (see FIG. 15C). It is not fitted in the longitudinal direction, and a gap is provided on both sides in the longitudinal direction of the key 40 (see FIG. 15B).

If the key 40 is not fitted in the key grooves 41 and 41 in the width direction of the guide rail 1, it will occur when the slider 2 moving on the guide rail 1 passes through the joint (connecting portion) of the rail component 20. Due to the vibration, the rail component 20 may be displaced in the width direction of the guide rail 1, and a step may be generated in the connecting portion. Further, the key groove 41 is expanded by heat generated from the traveling slider 2, and the rail component 20 may be displaced in the width direction of the guide rail 1. If there are no gaps on both sides in the width direction of the guide rail 1 and gaps are provided on both sides in the longitudinal direction, it is possible to prevent the above-described inconvenience from occurring.
Similar to the first modification shown in FIG. 12, in the fourth modification of the fifth embodiment, the pin 24 may be used together with the key 40 (parallel pin) as a connecting member. That is, a key groove 41 for the key 40 and a recess 22 for the pin 24 may be provided on the longitudinal end surface 20 a of the rail component 20, and the rail component 20 may be connected by the key 40 and the pin 24.

[Sixth embodiment]
The linear guide device according to the sixth embodiment will be described in detail with reference to FIGS. In addition, since the structure and effect | action of the linear guide apparatus of 6th embodiment are substantially the same as 1st embodiment, only a different part is demonstrated and description of the same part is abbreviate | omitted.
The connecting mechanism in the linear guide device of the sixth embodiment is to join the rail components 20 by a connecting jig 60 having a wedge mechanism. An example of this wedge mechanism will be described with reference to FIGS.

  As shown in FIG. 16, a recess 22 is provided on the end surface 20 a in the longitudinal direction of each rail component 20. The concave portion 22 includes an upper and lower reference surface 51 that is a plane parallel to the upper surface 1b of the guide rail 1 and left and right reference surfaces 52 and 52 that are planes parallel to the side surface 1a. The reference surface 52 is processed into a plane finished with high accuracy as a reference surface when connecting the rail components 20 and 20. The vertical reference surface 51 is provided with a rail mounting hole 53 that penetrates the rail component 20 in the vertical direction and a screw hole 54 in which an internal thread is formed on the inner peripheral surface.

  As shown in FIG. 17, the connecting jig 60 includes a fixing member 61, a pair of pressing members 62 and 62, and a wedge 63. The fixing member 61 is a substantially rectangular parallelepiped metal part having both ends in the long side direction formed in an arc shape. Bolt insertion holes 64 and 64 penetrating the fixing member 61 in the vertical direction are provided on both sides of the long side direction. Two bolt insertion holes 66 and 66 that pass through the fixing member 61 in the vertical direction are also formed in the middle portion. The bolt insertion hole 64 and the bolt insertion hole 66 are aligned with the rail mounting hole 53 and the screw hole 54, respectively. Further, the lower surface of the fixing member 61 is processed into a flat surface finished with high accuracy as a surface that contacts the vertical reference surface 51 of the concave portion 22 and performs positioning in the vertical direction.

  The pressing member 62 is a triangular prism-shaped metal part having a right-angled triangle cross section, and one of the surfaces of the triangular prism sandwiching the right angle is brought into contact with the upper surface of the fixing member 61 and the other surface is fixed to the fixing member. A pair is arranged on both sides of the intermediate portion of the fixing member 61 so as to be substantially the same as the side surface 61 (the surface in the left-right direction in FIG. 17C). Therefore, the inclined surfaces (surfaces facing at right angles) of the pressing members 62 are opposed to each other in a state of facing inward in the left-right direction. Further, the side surface of the pressing member 62 is processed into a flat surface finished with high accuracy as a surface that contacts the left and right reference surface 52 of the recess 22 and performs positioning in the left-right direction.

  The wedge 63 is a trapezoidal columnar metal part having a trapezoidal cross section, the surface forming the short side of the trapezoid is opposed to the fixing member 61, and both inclined surfaces abut against the inclined surfaces of the pressing members 62 and 62, respectively. It is arranged in the state of letting. Therefore, when the wedge 63 moves in a direction approaching the fixing member 61 (downward in FIG. 17C), the wedge 63 slides in a state where the slope of the wedge 63 is in contact with the entire slope of each pressing member 62, A wedge mechanism is configured by displacing the pressing member 62 outward in the left-right direction. Also, on the upper surface of the wedge 63, two bolt insertion holes 65, 65 penetrating the wedge 63 in the vertical direction are formed at positions aligned with the bolt insertion holes 66, 66 of the fixing member 61.

  Next, a method for connecting the rail components 20 will be described with reference to FIG. When the longitudinal end surfaces 20a, 20a of the two rail components 20, 20 are opposed to each other so that the outer edges thereof are substantially coincident with each other, the positions of the recesses 22, 22 are opposed to each other. Then, the fixing member 61 is fitted into the recess 22, and the bolts 67 and 67 are inserted through the bolt insertion hole 64 and the rail mounting hole 53 of the rail component 20, and screwed into the screw holes formed in the base 70. Temporarily fix.

  In this state, after the pair of pressing members 62 and the wedge 63 are arranged on the upper surface of the fixing member 61, the bolts 68 and 68 are inserted through the bolt insertion holes 65 of the wedge 63 and the bolt insertion holes 66 of the fixing member 61. The screw hole 54 formed in the recess 22 is screwed and tightened. When the bolt 68 is tightened, the wedge 63 approaches the fixing member 61 (moves downward in FIG. 18B), the pressing members 62 spread in the left-right direction, and the fixing member 61 is in the vertical reference plane 51 of the recess 22. Pressed against.

  In this manner, the pressing members 62 are brought into contact with the left and right reference surfaces 52 of the respective recesses 22 to position the rail members 20 and 20 in the left-right direction, whereby the longitudinal end surfaces 20a and 20a of the two rail components 20 and 20 are positioned. Can be connected without a step in the left-right direction. At the same time, the fixing member 61 is brought into contact with the upper and lower reference surfaces 51 of the respective recesses 22 to position the rail members 20 and 20 in the vertical direction, whereby the longitudinal end surfaces 20a and 20a of the two rail parts 20 and 20 are moved up and down. They are connected without any level difference.

  After that, if the bolt 67 is tightened further, the rail component 20 is fastened to the base portion 70 together with the fixing member 61, whereby the vertical bending of the rail component 20 is corrected, and the longitudinal end of the rail component 20 is in the vertical and horizontal directions. Both are attached to the base 70 as a guide rail 1 having no step. As described above, the connecting jig 60 having the wedge mechanism is fitted into the recess 22 provided on the end surface 20a in the longitudinal direction of the rail component 20 to constitute the connecting mechanism.

  The coupling mechanism of the sixth embodiment is provided in the concave portions 22 and 22 facing each other of the adjacent rail components 20 and 20 and does not require an external space for the coupling mechanism. There is almost no restriction on the application and installation location of the linear guide device. Moreover, since it can connect in the state which made the outer edge of adjacent rail components 20 and 20 correspond substantially completely, a level | step difference hardly arises in the connection part of adjacent rail components 20 and 20. FIG.

Furthermore, since the rail parts 20 and 20 can be connected only by inserting the connecting jig 60 into the recesses 22 and 22 of the longitudinal end faces 20a and 20a and tightening the bolts, the skill and experience of the connecting operator can be increased. The connection work can be performed easily, reliably, stably, accurately and efficiently without being affected.
In this connection mechanism, the amount of deviation between the adjacent rail components 20 and 20 is determined by the accuracy of the upper and lower reference surfaces 51 and 52 of the recess 22 and the accuracy of the fixing member 61 and the pressing member 62 that are in contact with them. The connection work can be performed without being affected by the skill level and experience of the person. Further, the vertical bending of the rail component 20 is often locally deformed on the side of the longitudinal end surface 20a from the rail mounting hole 53, but the vicinity of the longitudinal end surface 20a is fastened by a fixing member 61 with a bolt 68, and further the bolt By fixing to the base 70 by 67, the bending of the up-down direction is eliminated.

DESCRIPTION OF SYMBOLS 1 Guide rail 2 Slider 3 Rolling body 10 Rolling body rolling groove 11 Rolling body rolling groove 14 Rolling body rolling path 20 Rail component 20a Longitudinal end surface 22 Recess 24, 24a-24c Pin 25 Screw part 31 Through-hole 32 Flat surface 40 key 41 key groove 51 upper and lower reference surface 52 left and right reference surface 54 screw hole 60 connecting jig 61 fixing member 62 pressing member 63 wedge

Claims (13)

A guide rail having a rolling element raceway surface extending in the longitudinal direction, a slider having a rolling element raceway surface facing the rolling element raceway surface of the guide rail, the rolling element raceway surface of the guide rail, and the rolling element raceway surface of the slider A plurality of rolling elements arranged in a freely rolling manner in a rolling element rolling path formed between the sliders, and the slider is relatively movable in the longitudinal direction via the rolling of the rolling elements. A linear guide device supported by a rail,
The guide rail is composed of a plurality of rail parts that are coaxially arranged in a straight line and connected to each other, and a connection mechanism that connects the adjacent rail parts is provided between opposing longitudinal end faces of the adjacent rail parts. And
The coupling mechanism is a fitting mechanism that fits a convex portion into a concave portion and joins the concave portions to each other, and is provided with concave portions facing each other on opposite longitudinal end surfaces of the adjacent rail parts, and both end portions are convex portions. A linear guide device that is a mechanism for connecting adjacent rail parts by inserting and fitting the both end portions of one connecting member into the concave portions.   The coupling mechanism is provided with a plurality of recesses on the opposing longitudinal end surfaces of the adjacent rail parts, and the plurality of recesses on one longitudinal end surface are opposed to the plurality of recesses on the other longitudinal end surface. 2. The linear guide device according to claim 1, wherein the linear guide device is a mechanism for connecting adjacent rail parts by inserting and fitting both ends of the connecting member into the opposing concave portions.   The coupling mechanism is provided with two concave portions arranged side by side on the opposite longitudinal end surfaces of the adjacent rail parts, and the two concave portions on one longitudinal end surface are opposed to the two concave portions on the other longitudinal end surface. The linear guide device according to claim 1, wherein the linear guide device is a mechanism for connecting adjacent rail parts by inserting and fitting both end portions of two connecting members into the opposing concave portions. .   The coupling mechanism is provided with two concave portions arranged vertically on opposite longitudinal end faces of the adjacent rail parts, and the two concave portions on one longitudinal end surface are opposed to the two concave portions on the other longitudinal end surface. The linear guide device according to claim 1, wherein the linear guide device is a mechanism for connecting adjacent rail parts by inserting and fitting both end portions of two connecting members into the opposing concave portions. .   The linear guide device according to claim 1, wherein the connecting member is a pin.   The linear guide device according to claim 5, wherein the pin is a tapered pin.   The linear guide device according to claim 6, wherein the taper pin is a taper pin with an external thread.   The linear guide device according to claim 6, wherein the taper pin is a double-sided taper pin.   The said connection mechanism is equipped with the exhaust mechanism which discharges | emits the gas in the said recessed part out of the said recessed part when fitting the said convex part in the said recessed part, The Claim 1 characterized by the above-mentioned. Linear guide device.   The linear guide device according to claim 9, wherein the connecting member includes the exhaust mechanism.   The linear guide device according to claim 10, wherein the connecting member including the exhaust mechanism is a spring pin.   The coupling mechanism is provided with key grooves facing each other as the recesses on opposite longitudinal end faces of the adjacent rail parts, and inserting both ends of one key as the coupling member into the key grooves. The linear guide device according to claim 1, wherein the linear guide device is a mechanism for connecting adjacent rail parts by fitting.   The coupling mechanism is provided with a concave portion having an upper and lower reference surface and a left and right reference surface in the vertical direction of the rail component so as to face each other in the longitudinal direction end surfaces of the adjacent rail components facing each other, A connecting jig having a substantially rectangular parallelepiped fixing member as a convex portion and a pair of pressing members that are spread in the left-right direction by a wedge on the upper surface of the fixing member is disposed, and the wedge is connected to the concave portion. The linear guide device according to claim 1, wherein the linear guide device is a mechanism for connecting adjacent rail parts by pressing against an upper and lower reference plane.

Images