JP4963307B2 - Guide rail for cable protection guide device - Google Patents

Description

  The present invention is used for machine tools, electronic devices, civil engineering machines, industrial robots, transfer devices, etc., and electric cables, optical fiber cables, fluid supply for supplying power, signal transmission, liquid supply, air supply, etc. to these moving parts Cable protection guide device for protecting and guiding flexible cables and hoses such as hoses (hereinafter simply referred to as “cables”), and more specifically, the cable protection guide device is bent back in the longitudinal direction. In this case, the present invention relates to a guide rail for a cable protection guide device that is used together with the cable protection guide device in order to suppress lateral shaking of the cable protection guide device.

  When a cable is connected to a moving part such as a machine tool, a civil engineering machine, or a conveying device, the cable is forcedly twisted, bent, or pulled with the movement, and the cable is damaged or the appearance becomes cluttered. Therefore, a cable protection guide device for protecting and guiding these cables is used.

  In general, as shown in FIG. 14, the cable protection guide device includes a pair of link plates 202 arranged on both sides of the cable C, and connecting rods 201 horizontally mounted on the bent outer peripheral side and the bent inner peripheral side of the link plate 202, respectively. A plurality of link frame bodies configured as described above are connected in the longitudinal direction with the cable C inserted therein, so that the cable C is protected and guided between the moving end 206 and the fixed end 205.

  When such a cable protection guide device 200 is bent back in the longitudinal direction between the moving end 206 and the fixed end 205 and used for a long moving stroke (long span specification), the bent cable is used. The bent inner peripheral surfaces of the protection guide device 200 and the cable protection guide device 200 before being bent back do not orderly, the moving cable protection guide device 200 rolls, and smooth reciprocation is hindered. In this case, there is a concern that excessive stress is generated and the cable protection guide device 200 is broken.

  In order to avoid such a situation, as shown in FIG. 11, the cable protection guide device 200 is disposed between the bent portion 220 and the moving end 206 of the cable protection guide device 200 facing each other. A skate unit 300 including a roller 320 that prevents the cable protection guide device 200 from rolling is known (see, for example, Patent Document 1).

Further, as shown in FIG. 13 which is an enlarged view of the XIII portion of FIG. 12 and FIG. 12, along the track of the cable protection guide device 200, the cable protection guide device 200 is spliced in the longitudinal direction while facing the outside of the link plate. The support base plate 426 extended to the lower end portion of the rail member 420 is screwed to the connection base member 460 fixed to the floor surface with a nut 486 and a bolt 484 using a rail connection member 440 having a crank section. A guide rail 400 for a cable protection guide device is also known that suppresses lateral shaking of the cable protection guide device 200.
JP 2005-515370 A

  However, the skate unit 300 described above is used when the cable protection guide device 200 is folded back in the longitudinal direction and used in a long span specification. In this case, the cable protection guide device 200 is several tens of meters long. It becomes the length. As shown in FIG. 14, the cable protection guide device 200 is a linked body of link frames that are molded products. Therefore, a slight difference between the left and right link pitches is accumulated, a lateral bend occurs, and the skate unit 300. There was a problem of dropping out.

  On the other hand, in the above-described guide rail 400 for the cable protection guide device, as shown in part A of FIG. When reciprocating, there is a problem that this step and the side surface of the link plate 202 slide, the link plate 202 is worn and the strength is lowered, and wear powder is generated to contaminate the surroundings.

  In addition, since the mounting dimensions of the bolts 484 to be fixed to the connection base member 460 are different if the width is different due to the size difference of the cable protection guide device 200, it is necessary to prepare several types of connection base members 460 according to the size. was there.

  In the cable protection guide device guide rail 400, since the vertical surface of the rail member 420 is a flat surface, the side surface of the link plate 202 of the cable protection guide device 200 and the vertical wall of the rail member 420 are worn and worn powder. There was a problem that occurred.

  Furthermore, if the installation position of the connection base member 460 is shifted, the rail member 420 is also bent in accordance therewith, so that there is a problem that high installation accuracy is required and the work load during installation is large.

  Therefore, a technical problem to be solved by the present invention, that is, an object of the present invention, is to achieve excellent running stability by suppressing lateral shaking of the cable protection guide device, and further, the sliding of the cable protection guide device. To provide a guide rail for cable protection guide devices that can reduce the environmental load by suppressing the generation of abrasion powder due to movement, and can flexibly respond to changes in the size of the cable protection guide device and reduce the work burden during installation. It is.

  First, the invention according to claim 1 is a link frame configured by a pair of link plates spaced apart from each other on the left and right, and connecting rods horizontally mounted on the bent outer peripheral side and the bent inner peripheral side of the link plate. Cable protection guide device in which a large number of cables are connected to each other in the longitudinal direction and bent back between the moving end and the fixed end, and the cable protection is suspended by being joined to the outside of the link plate in the longitudinal direction. A plurality of rail members that suppress the shaking in the width direction of the guide device, a rail connecting member disposed between the adjacent rail members, and a connecting base member that supports the rail connecting member so as to be movable in the width direction. A guide rail for a cable protection guide device having a clamp bolt member for fixing the rail connection member to a connection base member, wherein the rail member is a bend of the cable protection guide device. A vertical wall having a height lower than twice the diameter, an inclined guide wall extending to the vertical wall and inclined outward, and a supporting bottom plate suspended from both sides of the lower end of the vertical wall; The member has a dovetail groove that guides the rail connecting member so as to be movable in the width direction, and the rail connecting member includes a base end portion that is in sliding contact with the connecting base member and a joint portion that is suspended from the base end portion. The end has a guide projection that engages with the dovetail groove of the connecting base member and a holding plate that presses and fixes the support bottom plate of the rail member that is connected to both sides by the reaction force of the bending, and the joint portion is connected to both sides A guide side piece that is directed to the outer end of the vertical wall of the rail member and a tip piece that extends from the guide side piece and surrounds the upper end of the inclined guide wall of the rail member to form a guide groove. And a head where the clamp bolt member engages with a dovetail groove of the connecting base member. By having a nut portion that is screwed into the screw portion and the screw portion for loosely fitted into the insertion hole formed in the base end portion of the rail connecting member is obtained by solving the above problems.

  The invention according to claim 2 is the guide rail for the cable protection guide device according to claim 1, wherein the rail connecting member has a cross-section halfway across the entire height of the vertical surface of the joint portion at the inner center of the joint portion. The above-mentioned problem is further solved by providing a curved projection in which the semicircular arc of the cross section is reduced in diameter as it approaches the tip in an arc shape.

  The invention according to claim 3 is the cable protection guide device guide rail according to claim 1 or 2, wherein the length of the tip piece of the rail connecting member is longer than the length of the inclined guide wall of the rail member. The above problem is further solved by being short.

  According to the guide rail for the cable protection guide device of the present invention, the link is constituted by a pair of link plates that are spaced apart from each other on the left and right, and the connecting rods that are horizontally mounted on the bent outer peripheral side and the bent inner peripheral side of the link plate. When a cable protection guide device in which a large number of frames are connected in the longitudinal direction is used by bending it back between the moving end and the fixed end, the cable protection guide device is vertically suspended by being joined to the outside of the link plate in the longitudinal direction. A plurality of rail members that suppress fluctuation in the width direction of the cable protection guide device, a rail connection member that is disposed between adjacent rail members, and a connection base member that supports the rail connection member so as to be movable in the width direction And a clamp bolt member for fixing the rail connecting member to the connecting base member, the blur in the width direction of the cable protection guide device is suppressed, and the moving end and the fixed end are fixed. When it is bent back to the end in the longitudinal direction, smooth reciprocating motion can be achieved even if it is a long moving stroke. The effect of can be produced.

  That is, according to the guide rail for the cable protection guide device according to the first aspect, the rail member extends to the vertical wall and the vertical wall having a height lower than twice the bending radius of the cable protection guide device and is inclined outward. The inclined guide wall and the supporting bottom plate suspended on both sides of the lower end of the vertical wall, the connecting base member has a dovetail groove for guiding the rail connecting member to move in the width direction, and the rail connecting member A support bottom plate for a rail member, which is formed by a base end portion that is in sliding contact with the connection base member and a joint portion that is suspended from the base end portion, and the base end portion is connected to the dovetail groove of the connection base member. A guide plate that is fixed to the outer end of the vertical wall of the rail member that has a pressing plate that presses and fixes the plate with a reaction force of bending, and the joint portion is provided on both sides of the rail member. Enclose the upper end of the inclined guide wall A screw portion and a screw having a distal end piece that forms an id groove, and a clamp bolt member that freely penetrates a head portion that engages with a dovetail groove of the connection base member and an insertion hole that is drilled in the base end portion of the rail connection member By having the nut portion screwed into the portion, the joint of the upper part of the rail member spliced in the longitudinal direction is surrounded by the tip piece that forms the guide groove of the rail connecting member, so that the joint does not fit Since there will be no steps, wear of the cable protection guide device will be suppressed, the service life of the cable protection guide device will be extended and the environmental load will be reduced, and post-processing will not be required to eliminate the step. The work burden at the time can be reduced.

  In addition, since the rail connecting member is guided by the dovetail groove of the connecting base member and fixed by the clamp bolt member so as to be movable in the width direction, it is possible to flexibly respond to the size change of the cable protection guide device and reduce the number of parts. Can be realized. In addition, since high installation accuracy is not required when installing the connection base member, the work burden during installation can be further reduced, and the installation position can be adjusted at any time to improve convenience. Furthermore, since the number of parts is small and no additional work is required, installation work at the site is facilitated.

  According to the invention according to claim 2, in the guide rail for the cable protection guide device according to claim 1, the cross-section half of the vertical length of the joint portion is provided at the inner center of the joint portion of the rail connecting member. Since the curved projection having the arcuate shape whose diameter of the semicircular arc of the cross section is reduced as it approaches the tip, the sliding contact area between the side surface of the link plate of the cable protection guide device and the vertical wall of the rail member is reduced. Therefore, generation | occurrence | production of abrasion powder can be suppressed and the environmental load can be further reduced, and the smooth reciprocation of the cable protection guide device can be realized. Furthermore, since the sliding noise is reduced, the quietness of the apparatus can be improved. Furthermore, the expansion and contraction of the rail member due to the temperature change of the installation environment can be absorbed by the guide groove of the rail connecting member, so that the joining of the rail member does not come off. In addition, since the holding plate is flexibly bent, the guide rail for the cable protection guide device having excellent adaptability to the temperature change of the installation environment can be realized without hindering the expansion and contraction of the rail member.

  According to the third aspect of the present invention, in the cable protection guide device guide rail according to the first or second aspect, the length of the tip piece of the rail connecting member is greater than the length of the inclined guide wall of the rail member. Since the bent portion of the cable protection guide device is prevented from being caught by the tip piece that forms the guide groove of the rail connecting member, excellent running stability of the cable protection guide device is realized.

  A guide rail for a cable protection guide device according to the present invention includes a link frame formed by a pair of link plates that are spaced apart from each other on the left and right, and connecting rods that are horizontally mounted on the bent outer peripheral side and the bent inner peripheral side of the link plate. Cable protection guide device in which a large number of cables are connected to each other in the longitudinal direction and bent back between the moving end and the fixed end, and the cable protection is suspended by being joined to the outside of the link plate in the longitudinal direction. A plurality of rail members that suppress shaking in the width direction of the guide device, a rail connecting member that is disposed between adjacent rail members, a connecting base member that supports the rail connecting member so as to be movable in the width direction, and a rail A vertical wall having a clamp bolt member for fixing the connecting member to the connecting base member, and a rail member having a height lower than twice the bending radius of the cable protection guide device An ant having an inclined guide wall extending to the vertical wall and inclined outward, and a supporting bottom plate suspended from both sides of the lower end of the vertical wall, and the connecting base member guides the rail connecting member so as to be movable in the width direction. A guide projection having a groove, a rail coupling member comprising a base end portion slidably contacting the connection base member and a joint portion extending vertically from the base end portion, and the base end portion engaging the dovetail groove of the connection base member and both sides And a holding plate that presses and fixes the support bottom plate of the rail member connected to the rail member by a reaction force of bending, and the guide side piece is directed to the outer end of the vertical wall of the rail member that is connected to both sides. And a tip piece extending from the guide side piece and surrounding the upper end of the inclined guide wall of the rail member to form a guide groove, and the clamp bolt member engages with the dovetail groove of the connecting base member And loosely penetrate the insertion hole drilled in the base end of the rail connecting member A screw portion and a nut portion screwed into the screw portion, thereby suppressing lateral shaking of the cable protection guide device and realizing excellent running stability. If it is possible to reduce the environmental load by suppressing the generation of abrasion powder due to sliding, and also to flexibly respond to the size change of the cable protection guide device and reduce the work load during installation Any specific embodiment may be used.

  For example, the guide rail for a cable protection guide device according to the present invention can be applied to a cable protection guide device made of engineering plastic or a cable protection guide device made of steel.

  The guide rail for a cable protection guide device of the present invention can also be applied to a so-called integral type cable protection guide device in which a link plate and a connection rod are integrally formed. The present invention can also be applied to a so-called open / close type cable protection guide device provided to be openable / closable.

An embodiment of the present invention will be described with reference to FIGS.
Here, FIG. 1 is a perspective view of the rail connecting member 140 of the guide rail 100 for the cable protection guide device of the embodiment, and FIG. 2 is a view of the rail connecting member 140 shown in FIG. FIG. 3 is a perspective view when the rail connecting member 140 shown in FIG. 1 is viewed from the direction of the arrow III. FIG. 4 is a perspective view in which the rail member on one side of the guide rail 100 for the cable protection guide device of the embodiment is omitted, and FIG. 5 is a guide rail 100 for the cable protection guide device shown in FIG. 6 is a side view of the cable protection guide device guide rail 100 shown in FIG. 5 when viewed from the direction of the arrow VI, and FIG. FIG. 7 is a bottom view of the cable protection guide device guide rail 100 shown in FIG. 5 when viewed from the direction of arrow VII. FIG. 8 is an assembly drawing in which the rail member on one side of the guide rail 100 for the cable protection guide device of the embodiment is omitted, and FIG. 9 is a guide rail 100 for the cable protection guide device shown in FIG. FIG. 10 is a front view of the guide rail 100 for the cable protection guide device of the embodiment.

  First, the guide rail 100 for the cable protection guide device according to the present embodiment is similar to the guide rail 400 for the cable protection guide device shown in FIG. 12 in that the cable protection guide device 200 is moved between the moving end 206 and the fixed end 205. When it is bent back in the longitudinal direction, the cable protection guide device 200 is laid on the floor along the track.

  The guide rail 100 for the cable protection guide device according to the present embodiment includes a pair of link plates 202 spaced apart on the left and right sides, and connecting rods 201 horizontally mounted on the bent outer peripheral side and the bent inner peripheral side of the link plate 202, respectively. As shown in FIGS. 4 to 9, when the cable protection guide device 200 in which a number of link frames configured by the above are connected in the longitudinal direction is bent between the moving end 206 and the fixed end 205, as shown in FIGS. A plurality of rail members 120 that suppress shaking in the width direction of the cable protection guide device that is vertically suspended from the outer side of the link plate are disposed between adjacent rail members 120. Rail connecting member 140, a connecting base member 160 that supports the rail connecting member 140 so as to be movable in the width direction, and the rail connecting member 140 as a connecting base portion. And a clamp bolt member 180 is fixed to 160.

  The rail member 120 includes a vertical wall 122 having a height lower than twice the bending radius of the cable protection guide device, an inclined guide wall 124 that extends to the vertical wall 122 and is inclined outward, and a lower end portion of the vertical wall 122. And a supporting bottom plate 126 suspended from both sides. Here, the reason why the height of the vertical wall 122 of the rail member 120 is set lower than twice the bending radius of the cable protection guide device is to prevent the roll of the cable protection guide device even if the height is higher than that. This is not preferable because the manufacturing cost of the rail member 120 increases. More preferably, the height of the vertical wall 122 is preferably set higher than the bending radius of the cable protection guide device in order to reliably prevent the cable protection guide device from rolling. The rail member 120 is preferably made of aluminum in terms of ease of handling, weight reduction, and ease of additional processing. Furthermore, it is preferable to apply a silver coating to anodizing as required.

  Moreover, the connection base member 160 has a dovetail groove 162 that guides the rail connection member 140 so as to be movable in the width direction. The connection base member 160 is preferably made of stainless steel in order to firmly fix the rail member 120 to the floor surface.

  As shown in FIGS. 1 to 3, the rail connecting member 140 includes a base end portion 142 that is in sliding contact with the connecting base member 160 and a joint portion 146 that is suspended from the base end portion 142. The base end portion 142 includes a guide protrusion 143 that engages with the dovetail groove 162 of the connection base member 160 and a pressing plate 144 that presses and fixes the support bottom plate 126 of the rail member 120 connected to both sides with a reaction force of bending. The joint portion 146 extends from the guide-side piece 147 and the guide-side piece 147 that are directed to the outer end portion of the vertical wall 122 of the rail member 120 that is provided continuously on both sides, and the rail member 120 is inclined. And a tip piece 148 that surrounds the upper end of the guide wall 124 and forms a guide groove. Here, as shown in FIG. 1, the presser plate 144 can create a reaction force of bending without providing another member by providing a thin portion 144 a with a thin intermediate portion.

  Further, as shown in FIG. 9, the clamp bolt member 180 has a rectangular head 182 that engages with a dovetail groove 162 of the connection base member 160 and an insertion hole 145 that is drilled in the base end portion 142 of the rail connection member 140. A loosely threaded screw part 184 and a nut part 186 screwed into the screw part 184 are provided. By engaging the dovetail 162 with the head 182 having a rectangular shape, when the nut portion 186 is tightened, the screw portion 184 is prevented from rotating and spinning freely.

  The clamp bolt member 180 has its head portion 182 engaged with the dovetail groove 162 of the connection base member 160 and is guided by the dovetail groove 162 to be orthogonal to the width direction of the connection base member 160, that is, the longitudinal direction of the cable protection guide device. It is supported so that it can move freely. Then, the rail connecting member 140 is moved along the dovetail 162 of the connecting base member 160 by allowing the threaded portion 184 of the clamp bolt member 180 to loosely penetrate the insertion hole 145 drilled in the base end portion 142 of the rail connecting member 140. It can be movably supported. As shown in FIG. 8, the guide side piece 147 of the rail connecting member 140 is directed to the outer end portion of the rail member 120 from both sides of the rail connecting member 140, and the upper end portion of the inclined guide wall 124 of the rail member 120 is It is surrounded by a guide groove formed by the tip piece 148 of the rail connecting member 140. Further, as shown in FIG. 4, the support bottom plate 126 of the rail member 120 is pressed by the pressing plate 144 formed at the base end portion of the rail connecting member 140 and the nut portion 186 of the clamp bolt member 180 is tightened. The pressure plate 144 is pressed and fixed using the reaction force of the bending of the holding plate 144.

  Further, as shown in FIGS. 1 and 3, the rail connecting member 140 has a semicircular cross section in the center of the inside of the joint portion 146 over the entire height of the vertical surface of the joint portion 146, and a semicircular arc with a cross section as approaching the tip. Is provided with a curved protrusion 149 whose diameter is reduced.

  Further, as shown in FIG. 10, the length l of the tip piece 148 of the rail connecting member 140 is formed to be shorter than the length L of the inclined guide wall 124 of the rail member 120.

  The rail connecting member 140 is preferably integrally formed using a synthetic resin such as engineering plastic from the viewpoint of reducing the number of manufacturing steps.

  As described above, the guide rail 100 for the cable protection guide device according to the embodiment of the present invention has the tip piece 148 in which the joint at the upper part of the rail member 120 joined in the longitudinal direction forms the guide groove of the rail connecting member 140. Therefore, the cable protection guide device is prevented from being worn, and the service life of the cable protection guide device can be extended and the environmental load can be reduced.

  Further, since the rail connecting member 140 is guided by the dovetail groove 162 of the connecting base member 160 and is fixed by the clamp bolt member 180 so as to be movable in the width direction, it is possible to flexibly cope with the size change of the cable protection guide device. The number of parts can be reduced. In addition, when installing the connecting base member 160, high installation accuracy is not required, so that the work burden during installation can be reduced.

  Since the curved projection 149 protrudes, the sliding contact area between the side surface of the link plate of the cable protection guide device and the vertical wall 122 of the rail member 120 is reduced, so that generation of wear powder is suppressed and the environmental load is further increased. Can be reduced, and a smooth reciprocation of the cable protection guide device can be realized. Furthermore, since the sliding noise is reduced, the quietness of the apparatus can be improved.

  Furthermore, since the bent portion of the cable protection guide device is prevented from being caught by the tip piece 148 that forms the guide groove of the rail connecting member 140, excellent running stability of the cable protection guide device is realized.

The perspective view of the rail connection member 140 of the guide rail 100 for cable protection guide apparatuses which is an Example of this invention. The perspective view when the rail connection member 140 shown in FIG. 1 is seen from arrow II direction. The perspective view when the rail connection member 140 shown in FIG. 1 is seen from arrow III direction. The perspective view which abbreviate | omitted and drawn the rail member of the one side of the guide rail 100 for cable protection guide apparatuses. The side view when the guide rail 100 for cable protection guide apparatuses shown in FIG. 4 is seen from arrow V direction. The top view when the guide rail 100 for cable protection guide apparatuses shown in FIG. 5 is seen from the arrow VI direction. The bottom view when the guide rail 100 for cable protection guide apparatuses shown in FIG. 5 is seen from the arrow VII direction. The assembly drawing which abbreviate | omitted the rail member of the one side of the guide rail 100 for cable protection guide apparatuses, and was drawn. FIG. 9 is an assembly diagram when the guide rail 100 for the cable protection guide device shown in FIG. 8 is viewed from the arrow IX direction. The front view of the guide rail 100 for cable protection guide apparatuses. Schematic of the conventional skate unit for cable protection guide apparatuses. The perspective view of the guide rail for the conventional cable protection guide apparatuses. The expansion perspective view of the XIII part of the guide rail for cable protection guide apparatuses shown in FIG. The perspective view of a cable protection guide apparatus.

Explanation of symbols

100, 400 ... Guide rails 120, 420 for the cable protection guide device ... Rail member 122 ... Vertical wall 124 (of the rail member) ... Inclined guide walls 126 (426) (of the rail member) ... Support bottom plates (of the rail member) 140, 440 ... Rail connection member 142 ... Base end portion 143 (of the rail connection member) Guide projection 144 ... (of the base end portion of the rail connection member) Presser plate 144a (at the base end of the rail connecting member) Thin portion 146 (of the presser plate) Joint portion 147 (of the rail connecting member) Guide side piece (of the joint portion of the rail connecting member) 148 ... Tip piece 149 (of the joint part of the rail connecting member) ... Curved projection 160 (460 of the joint part of the rail connecting member) ... 460 ... Connection base part 162 ... Dovetail groove 180 (of the connecting rail member) ... Clamp bolt member 182 ... Head 184 (of the clamp bolt member) ... Screw part 186 (of the clamp bolt member) ... (Clamp bolt) Nut 200 of member ... Cable protection guide device 201 ... Connection rod 202 (of cable protection guide device) ... Link plate 205 (of cable protection guide device) ... (of cable protection guide device) Fixed end 206 ... Moving end 300 (of cable protection guide device) ... Skate unit 320 ... Roller (of skate unit)

Claims (3)

A cable protection guide in which a number of link frame bodies each composed of a pair of link plates spaced apart on the left and right and connecting rods horizontally mounted on the bent outer peripheral side and the bent inner peripheral side of the link plate are connected in the longitudinal direction. When the device is bent between the moving end and the fixed end and used, a plurality of cable protection guide devices that are vertically installed in a longitudinal direction facing the outside of the link plate are restrained from shaking in the width direction. A rail connecting member disposed between the adjacent rail members, a connecting base member that supports the rail connecting member so as to be movable in the width direction, and the rail connecting member as a connecting base member A guide rail for a cable protection guide device having a clamp bolt member to be fixed,
The rail member is vertically installed on both sides of a vertical wall having a height lower than twice the bending radius of the cable protection guide device, an inclined guide wall extending to the vertical wall and inclined outward, and a lower end portion of the vertical wall. A supporting bottom plate,
The connecting base member has a dovetail groove that guides the rail connecting member to be movable in the width direction,
The rail connecting member includes a base end portion that is in sliding contact with the connecting base member, and a joint portion that is suspended from the base end portion, and the base end portion is provided on both sides of a guide protrusion that engages with a dovetail groove of the connecting base member. A holding plate that presses and fixes the supporting bottom plate of the rail member to be bent with a reaction force of bending,
A guide groove extending from the guide side piece and extending from the guide side piece to the outer end of the vertical wall of the rail member where the joint portion is provided continuously on both sides and surrounding the upper end portion of the inclined guide wall of the rail member And a tip piece forming
The clamp bolt member has a head portion that engages with a dovetail groove of the connection base member, a screw portion that loosely passes through an insertion hole drilled in a base end portion of the rail connection member, and a nut portion that is screwed into the screw portion. A guide rail for a cable protection guide device.   A curved projection having a semicircular cross section in the shape of a semicircular cross section over the entire length of the vertical surface of the joint portion is provided at the inner center of the joint portion of the rail connecting member. The guide rail for a cable protection guide device according to claim 1.   The guide rail for a cable protection guide device according to claim 1 or 2, wherein a length of a tip piece of the rail connecting member is shorter than a length of an inclined guide wall of the rail member.

Images