JP5940518B2 - rail - Google Patents

Description

  The present invention relates to a rail capable of guiding a carriage equipped with a machining torch along the surface of a workpiece including a curved surface.

  For example, a steel pipe or a cylindrical tank having a large diameter may be cut into a circular shape or welded. In addition, from the viewpoint of design, there is a case where a workpiece having a corrugated surface or a surface obtained by combining a curved surface and a flat surface is cut or welded. These processes are generally performed on-site at the time of construction work such as pipeline construction for transporting crude oil or natural gas, construction of a storage tank, or the like.

  When a large-diameter steel pipe or tank is cut or welded on site, a truck equipped with a processing torch suitable for the intended processing is used, and the carriage is processed while being moved along the surface of the steel pipe or tank. However, since the surface to be processed is a three-dimensional curved surface, it is common to have a special guide mechanism for moving the carriage along the curved surface.

  One example (known example) of a mechanism for guiding a carriage for processing a large-diameter steel pipe is a chain having a plurality of detachable links. The cart applied to this mechanism is equipped with a wheel that is mounted with a target machining torch and meshes with a chain, and is configured such that the wheel is driven in contact with the outer peripheral surface of the steel pipe. Then, the chain can be wound around the outer peripheral surface of the steel pipe and meshed with the wheel of the carriage, and the carriage can be driven in this state to move along the outer peripheral face of the steel pipe (for example, manufactured by Koike Oxygen Co., Ltd.). "Autopickle"). In this technique, since the chain needs to be wound around the outer peripheral surface of a steel pipe or a tank, the workpiece is limited to a shape in which the portion to be processed is closed, and the diameter that can be processed is also limited.

  On the other hand, the technique described in Patent Document 1 relates to a rail device that can be applied to a curved workpiece surface that does not close a workpiece portion. This rail device comprises a holding means for holding a work piece, a metal strip-like substrate, a metal strip attached to the strip substrate and extending in the longitudinal direction to form a regular corrugated shape. And a piece (rack). Then, by attaching the holding means to the surface of the work material and bending the belt-like substrate, the cutting and welding apparatus can be guided along the work surface.

  In this technique, a metal strip is formed into a corrugated shape (rack shape) and the bottom is welded to a belt-like substrate, so that the rigidity in the lateral direction can be increased, and when bending in the longitudinal direction, There is no obstacle. For this reason, the stiffness of the belt-like substrate can be optimized, and sufficient flexibility can be provided to obtain the required minimum radius, and sufficient rigidity can be provided to support the load of the cutting and welding apparatus.

  Therefore, in the technique described in Patent Document 1, the belt-like substrate can be bent in the vertical direction along the surface of the workpiece by attaching the belt-like substrate to the workpiece by the holding means, and can be cut and welded. When the apparatus is mounted, the workpiece can be processed while supporting this load without causing the band-shaped substrate to bend.

Japanese Utility Model Publication No. 63-47429 (Japanese Utility Model Publication No. 59-16793)

  When a cart is guided along a three-dimensional curved surface, the wheels of the cart are moved in direct contact with the curved surface (known example) or moved by using a guide member along the curved surface (Patent Document 1). It is common. However, in the known example, there is a problem that the workpiece is limited to a closed shape such as a steel pipe or a tank, and the diameter that can be processed is limited. For this reason, in order to improve the freedom degree of a workpiece, as described in patent document 1, it is preferable to use the strip | belt-shaped board | substrate which has flexibility.

  On the other hand, hoses and power cords for supplying fuel gas, oxygen gas, inert gas, etc. are connected to cutting torches and welding torches that are processing torches. A heavy load is applied. For this reason, when the carriage is moved along a three-dimensional curved surface, how to drive the carriage is a big problem. In order to realize reliable driving of the carriage, a rack is generally used.

  However, when the rack is integrated with the flexible guide member, the rigidity of the guide member is increased and the flexibility is hindered, which makes it difficult to bend along the curved surface. .

  In order to solve this problem, in the technique described in Patent Document 1, a rack is formed by continuously forming a flexible metal strip into a corrugated shape. However, the rack needs to have sufficient strength and rigidity to support the driving force of the cutting and welding apparatus. When such a rack is provided, the belt-like substrate also has increased longitudinal rigidity. . Therefore, even in the technique described in Patent Document 1, when the belt-like substrate is bent in the vertical direction, there is a possibility that the thin strips constituting the rack may become a resistance.

  An object of the present invention is to provide a rail that can be easily bent along a curved workpiece surface and can move a carriage along the workpiece surface.

  In order to solve the above problems, a rail according to the present invention is a rail that guides a carriage equipped with a machining torch along the surface of a workpiece having a workpiece surface including a curved surface. A plurality of rail pieces having a rack on the upper surface; and a joint member that connects the adjacent rail pieces; and at least one side surface of the rail pieces adjacent to each other. Forming a protrusion, arranging the plurality of rail pieces so as to interpose the protrusion between the other rail pieces adjacent to each other, and articulating in a state where a gap is provided around the protrusion between the rail pieces; It is comprised so that it may attach to a workpiece via an attachment member.

  In the rail, the joint member is a bendable linear body, and the rail piece is provided with a through hole through which the joint member passes, and at least the rail piece at both ends of the rail piece is connected to the both ends. It is preferable to fix the joint member to the rail piece.

  In the rail according to the present invention, a joint member that bends along a curved surface of the work surface of the workpiece and a through hole that passes through the joint member in the width direction are formed, and the through hole is formed. A plurality of rail pieces each having a protrusion formed on at least one surface (side surface) and provided with a rack on the upper surface. The protrusion is disposed between the rail piece and the adjacent rail piece to provide a gap. Since the joint member is mounted in a state in which it is in a closed state, a gap corresponding to the size of the protrusion formed on the rail piece is also formed between adjacent racks.

  As described above, the rack has the same dimension as the width of the rail piece, and a gap is formed between adjacent racks. That is, although the rack is provided over the entire length of the rail, the rack is maintained in a divided state, so that the rigidity of the joint member is not increased and the initial bending performance can be maintained.

  Therefore, by attaching a plurality of rail pieces and fixing the rail pieces arranged at least at both ends to the joint member and attaching the rail pieces to the workpiece through the attachment members, the joint member can be moved along the surface of the workpiece. Can be bent easily. At this time, the rail piece is in contact with the other rail piece adjacent to the projection provided on the side surface so as to secure a gap, so that the gap changes due to the change in the posture of the rail pieces due to the bending of the joint member. Can be absorbed.

  Moreover, since the guide part which guides the moving direction of a trolley | bogie was formed in each of several rail pieces, a trolley | bogie can be guided with a guide part.

It is a 3rd view explaining the structure of a rail. It is a perspective view of a rail. It is a 4th page explaining the structure of a rail piece. It is a perspective view of a rail piece. It is the figure which expanded a part in order to explain the composition of a rail. It is a perspective view of the rail curved to convex upward. It is a perspective view of the rail curved to the upper concave. It is a figure explaining the other structure of a rail. It is explanatory drawing of the shape of the protrusion of a rail piece. It is explanatory drawing of the shape of the protrusion of the rail piece in other embodiment.

  Hereinafter, the structure of the rail according to the present invention will be described. The rail according to the present invention includes a curved surface such as a large-diameter steel pipe, a tank for storing oil, gas, chemicals, or the like, or a steel material having a curved surface and a flat surface formed into a corrugated shape. When a workpiece having a workpiece surface is cut or welded, a carriage equipped with a machining torch can be guided along the surface of the workpiece.

  As described above, the rail according to the present invention can be bent along a curved workpiece surface, and can be linear along a flat workpiece surface. However, in the following description, the fact that the rail bends along the curved surface to be processed will be particularly described.

  In the rail according to the present invention, a joint member that can be bent along a curved surface of a work surface of a work material, and a through-hole for inserting the joint member are formed through the width direction. And a plurality of rail pieces having protrusions formed on at least one surface where the through holes are formed and having a rack provided on the upper surface, and the other rail pieces adjacent to each other. A plurality of rail pieces are mounted on the joint member by inserting the joint member through the through-holes of the rail pieces in a state in which the protrusions are arranged between the rail pieces, and arranged at least on both ends in the longitudinal direction of the joint member. The rail piece is fixed to the joint member and attached to the workpiece through the attachment member.

  Each of the plurality of rail pieces is formed with a guide portion that guides the moving direction of the carriage.

  In the present invention, the unit length of the rail is not limited, and it is preferable to set the length appropriately such as 2 m or 3 m. Further, the width dimension of the rail (length of the rail piece) is not limited, and it is preferable that the rail width dimension is appropriately set in accordance with the width dimension of the carriage to be applied.

  The joint member constituting the rail may be a linear body that can be bent along the curved surface of the workpiece, and the material, shape, and dimensions thereof are not limited. That is, the joint member can be used as long as it satisfies conditions such as sufficient flexibility and plastic deformation even when bent to a preset radius.

  In addition, the number of joint members arranged in the width direction when configuring a rail of unit length is not limited, either using one joint member or using a plurality of joint members arranged in parallel. Is also possible.

  As a joint member, a plate-shaped member, a round bar-shaped member or a rectangular rod-shaped member can be used, and the material can be a steel such as stainless steel or spring steel or a non-ferrous metal such as phosphor bronze or copper. It is. And it is preferable to set appropriately whether it is set as one joint member or several joint members according to the material and shape which comprise a joint member, and the load which acts.

  The rail piece is attached to the joint member and has a function of guiding the movement of the carriage by forming an apparently continuous rack without impairing the flexibility of the joint member. For this reason, the rail piece is formed with a through hole for penetrating the joint member in the width direction, and at least one surface (side surface) on which the through hole is formed has a preset height. A protrusion is formed, and a rack is provided on the upper surface.

  The through hole formed in the rail piece is for inserting the joint member, and is formed corresponding to the shape, size and quantity of the joint member. When the joint member is inserted and attached to the through hole formed in the rail piece, the attached rail piece has freedom of movement in the longitudinal direction of the joint member, and the cross-sectional dimension of the joint member and the dimension of the through hole And the degree of freedom of movement of the difference.

  For this reason, at least the rail pieces arranged on both end sides of the joint member are fixed to the joint member, whereby a plurality of rail pieces arranged inside the fixed rail piece are mounted without being detached from the joint member. The It is not limited whether the rail piece inside the rail piece arranged on both ends is fixed to the joint member.

  The structure for fixing the rail piece to the joint member is not limited, as long as both can be firmly fixed. As such a structure, for example, a screw hole is formed in the joint member corresponding to the width dimension of the rail piece, and a bolt is inserted from the upper surface of the rail piece to be fastened to the screw hole of the joint member. It is possible. Alternatively, a screw hole may be formed in the rail piece, a bolt may be fastened to the screw hole, and the joint member may be pressed and fixed at the tip of the bolt. Furthermore, it is also possible to form a hole through which the bolt is inserted in the rail piece and the joint member, and to be able to fasten and fix the bolt to the mounting member.

  When mounting the plurality of rail pieces to the joint member, the protrusion provided on the side surface of the rail piece is disposed between the adjacent rail pieces. In particular, when the adjacent rail pieces are brought into contact with each other via the projections and attached to the joint member, gaps corresponding to the heights of the projections are formed between the rail pieces above and below the projections.

  Therefore, the rail piece has a degree of freedom of change in posture with the protrusion as a fulcrum in the range of the gap formed vertically between adjacent rail pieces. For this reason, the height of the protrusion provided on the side surface of the rail piece is appropriately set according to conditions such as the value of the bending radius required for the rail, the dimension of the rail piece and the height of the rack provided on the upper surface of the rail piece, and the like. It is preferred that

  In addition, the position of the protrusion on the side surface of the rail piece is not particularly limited, but in order to absorb the change in the posture between adjacent rail pieces well, the joint member formed on the rail piece is inserted. It is preferable to have a center at a height position substantially the same as the position in the height direction of the through-hole.

  The protrusion of the rail piece may be formed on at least one side surface. However, the protrusion has a function of setting a gap between adjacent rail pieces, and may be formed on both side surfaces. In addition, the height dimension of the protrusion provided on the side surface of the rail piece, that is, the gap dimension between the adjacent rail pieces is not limited, and the dimension (vertical dimension) including the rail piece thickness dimension and the rack thickness dimension. ) And the radius of bending assumed for the rail is preferably set as appropriate.

  In addition, the configuration of the protrusion is not limited, and a part of the rail piece may be formed to protrude, and a member corresponding to the protrusion is created in advance separately from the rail piece. The member may be integrated with the rail piece by screwing or bonding. When the protrusion is made of a member different from the rail piece, metal or synthetic resin can be used. In particular, in the case of a protrusion made of synthetic resin, it is preferable that a small hole is formed on the side surface of the rail piece, and the hole can be bonded and integrated with the hole.

  Further, the shape of the protrusion is not limited, and any shape including a shape in which the protrusion portion is a curved surface, a shape in which the protrusion portion is a spherical surface, a shape in which the tip of the protrusion is a flat surface, and the like may be used. However, since the rail bends following the curved workpiece surface of the workpiece, the projection is preferably formed by a curved surface or a spherical surface. The shape of the protrusion is preferably set as appropriate in accordance with conditions such as a method and a material for forming the protrusion.

  Further, the number of protrusions formed on the side surface is not limited, and may be one or more. For example, when the protrusion is a curved surface, the protrusion may be formed at one central portion in the length direction of the rail piece. When the protrusion is a spherical surface, a plurality of protrusions are preferably formed in the length direction. . The number of protrusions can not be set independently, but it is preferable that the number of protrusions is appropriately set in accordance with the relationship between the two in consideration of the number of joint members when forming the rail.

  When a plurality of rail pieces are attached to the joint member, the rack provided on the upper surface of each rail piece continues in the longitudinal direction of the rail with a gap corresponding to the height of the protrusion. For this reason, it is preferable that the rack provided in each rail piece is formed in advance assuming the gap.

  The material constituting the rail piece is not particularly limited, and a ferrous material such as stainless steel or carbon steel, a non-ferrous material such as aluminum, or a synthetic resin material can be selectively used. However, aluminum is preferable from the viewpoint of weight and workability.

  The rail is attached to the workpiece through an attachment member. The structure of the attachment member is not limited, and it is preferable to use a magnet when the workpiece is a magnetic material, and when the workpiece is a non-magnetic material, it is a vacuum cup that is vacuum-adsorbed. preferable. In any case, the attachment member may be any member that can attach the rail to the workpiece, and the specific structure is not limited.

  Next, an embodiment of the rail will be described with reference to the drawings. Prior to describing the configuration of the rail A according to the present embodiment, the rail piece 1 will be described with reference to FIGS.

  The rail piece 1 is a strip-shaped and square bar-shaped piece, and is formed with a through hole 1a that penetrates the width direction and passes through the joint member 10 that is a linear body. In the present embodiment, the through holes 1a are formed at two locations distributed in the length direction of the rail piece 1 on both sides of a projection 1e to be described later.

  A hole 1c is formed from the upper surface 1b of the rail piece 1 toward each through hole 1a, and a bolt 11 (see FIG. 1) is inserted into the hole 1c and fastened to fasten the rail piece 1 to the joint member 10. It is configured to be fixed.

  As shown in FIG. 5, a protrusion 1e having a protruding portion formed as a curved surface is formed at the approximate center of both side surfaces 1d of the rail piece 1. As shown in FIG. The protrusion 1b is set to have a height of about 0.2 mm, and when mounted on the joint member 10, a gap d of about 0.4 mm can be formed between other adjacent rail pieces 1. It is configured.

  Furthermore, the rail piece 1 has two four holes 1f and 1g penetrating in the width direction. The hole 1f is formed on the end side in the length direction of the rail piece 1. Especially when it is necessary to increase the rigidity as the rail A, a wire (not shown) or a flexible round bar is inserted. It is possible to achieve the purpose by screwing both ends. Further, the hole 1g is formed on the center side. For example, when the protrusion is formed of a synthetic resin molded product, the molded product can be fitted.

  A hole 1i is formed through the rail piece 1 from the upper surface 1b to the lower surface 1h. This hole 1i is for inserting a bolt 16 (see FIG. 1) for fixing to the bracket 15a of the mounting member 15.

  A rack 2 is provided on the upper surface 1 b of the rail piece 1, and the rack 2 is fixed by bolts 3. The teeth 2 a of the rack 2 are formed on one side surface in the longitudinal direction of the rail piece 1, and the tooth shape thereof is the same as that of the rack 2 of the other rail piece 1 adjacent when the plurality of rail pieces 1 are attached to the joint member 10. It is formed in a continuous shape and size. That is, the rack 2 is formed shorter by a dimension corresponding to the gap d formed by the protrusion 1e.

  Guide portions 5 are formed at both end portions in the longitudinal direction of the rail piece 1 (corresponding to both end portions in the width direction of the rail A). The guide portion 5 is composed of two inclined surfaces 5a and 5b formed from the upper surface 1b and the lower surface 1h toward the end portion, and the guide rollers 22 of the carriage 20 shown in FIG. 8 are provided on these inclined surfaces 5a and 5b. It is comprised so that it can engage. As the pinion (not shown) provided on the carriage 20 is engaged with the teeth 2a of the rack 2 and rotates, the guide rollers are rotated in contact with the inclined surfaces 5a and 5b. It is possible to guide the movement.

  Since the guide part 5 is set in relation to the structure of the carriage, it does not necessarily have to be formed at both end portions in the length direction of the rail piece 1, and a groove-like guide part is formed on the upper surface 1 b of the rail piece 1. It is also possible to do.

  In this embodiment, the width dimension of the rail piece 1 is set to about 14 mm, and the thickness dimension is set to about 10 mm. The length dimension is set to about 150 mm. However, it is not limited to these dimensions, and it should be set in consideration of various conditions such as the configuration of the carriage and the burden weight.

  As shown in FIG. 4, the rail piece 1 configured as described above is mounted by inserting the two joint members 10 through the through holes 1a. The joint member 10 can be sufficiently bent along a curved workpiece surface of a workpiece such as a large-diameter tube or a cylindrical tank, and has a preset bending radius (in this embodiment, It has such flexibility that it does not cause plastic deformation even when bent to a minimum of about 800 mm).

  In this embodiment, two stainless steel plates having a thickness of about 2 mm, a width of about 10 mm, and a length of about 1 m are employed as the joint member 10.

  The rail A is configured by mounting a plurality of rail pieces 1 on two joint members 10 arranged in parallel, and fixing the five rail pieces 1 including both end sides to the joint member 10 with bolts 11. .

  When a plurality of rail pieces 1 are mounted on the joint member 10 and the rail pieces 1 on both ends are fixed, as shown in FIG. 5, the protrusions formed on each rail piece 1 between adjacent rail pieces 1 1e is interposed, and a gap d corresponding to the height of these protrusions 1e is formed.

  At the site where the rail piece 1 is fixed to the joint member 10, fixing to the mounting member 15 is also performed at the same time. That is, the rail piece 1 is fixed to the mounting member 15 by inserting the bolt 16 through the hole 1 i formed in the rail piece 1 and fastening it to the bracket 15 a of the mounting member 15.

  The attachment member 15 includes a bracket 15a and a pair of magnets 15b disposed at both end portions of the bracket 15a. The rail body A formed by connecting the rail pieces 1 in series is fixed to the bracket 15a of the attachment member 15 at a predetermined interval by the bolts 16 attached to the holes 1i of the rail piece 1 as described above. The rail A can be attached by attracting the magnet 15b of the attachment member 15 to the surface of the workpiece.

  In this embodiment, the length of the joint member 10 is set to about 1 m, and the attachment members 15 are arranged at five locations including both end portions within this length range. Accordingly, the distance between the mounting members 15 is set to about 250 mm. With this size, the rail A can sufficiently withstand the weight of the carriage 20 regardless of the load. .

  As shown in FIGS. 1 and 2, the rail A configured as described above by the plurality of rail pieces 1, the joint portion 10, and the attachment portion 15 is formed in the joint member 10 in such a manner that the rail piece 1 and the rack 2 are independent from each other. Since it is attached, the flexibility of the joint member 10 is not hindered. For this reason, when the rail A is attached to the curved surface of the workpiece by attracting the magnet 15b of the attachment member 15, the rail A can be bent sufficiently following the curved surface. (See FIGS. 6-8).

  6 to 8, when the rail A is bent upwardly or concavely upward, the change in the posture of the rail piece 1 due to the bending is formed between the adjacent rail pieces 1. It is absorbed by the gap d.

  FIG. 8 shows a structure in which a long rail A is formed by continuous unit-length rails. The carriage 20 that moves along the rail A is equipped with a welding torch as the machining torch 21 and is configured to weld a workpiece (not shown). In this carriage 20, the guide rollers 22 are engaged with guide portions 5 formed at both ends in the width direction of the rail A (at both ends in the longitudinal direction of each rail piece 1). A pinion (not shown) is provided on the mask of the carriage 20, the pinion meshes with the rack 2 of the rail A, and the pinion is rotated by the driving device of the carriage 20, so that the guide roller 22 is guided by the guide roller 22. 5 travels on the rail A by being guided in contact with the slopes 5a and 5b constituting the vehicle 5.

  FIG. 9 illustrates the shape of the protrusion 1e of this embodiment. FIGS. 4A and 4B are an AA sectional view and a BB sectional view of FIG. 4, respectively. In the present embodiment, the protrusion 1e is raised only in the height direction (thickness direction) of the rail piece 1 in FIG. 4 and is not formed in the longitudinal direction of the rail piece 1. Due to the shape of the protrusion 1e, as shown in FIGS. 6 and 7, the rail A of the present embodiment only allows refraction of the rail piece 1 in the height direction.

  FIG. 10 illustrates the shape of the protrusion 1e according to another embodiment. Like FIGS. 9A and 9B, FIGS. 9A and 9B are a cross-sectional view taken along line AA and a cross-sectional view taken along line BB in FIG. The protrusions 1e of the other embodiment are formed not only in the height direction (thickness direction) of the rail piece 1 in FIG. 4, but also in the longitudinal direction of the rail piece 1, and the central portion of the surface is gently formed. Has a raised structure. Depending on such variations, the rail A is allowed to bend at a certain angle in the horizontal direction, and the rail A can be installed in a meandering state in the horizontal direction. In this variation, when meandering in the horizontal direction, the teeth 2a of the rack 2 are separated from each other, but in order to minimize the distance, the teeth 2a of the rack 2 are positioned in the vicinity of the protrusion 1e.

  In addition, about the protrusion 1e, the variation which forms in only one side of the rail piece 1 and does not form in the other side other than the variation of the shape of FIG. 10 can also be selected. In this case, the protruding height of the protrusion 1e formed only on one side surface is made larger than that formed on both side surfaces. Further, the protrusion 1e may be any one that can ensure a gap d that allows the posture change of the rail piece 1 between the adjacent rail pieces 1, and is different from the gently protruding protrusions of FIGS. 9 and 10. It may be something like (bump).

  In the present embodiment, the mounting member 15 is fixed to the rail piece 1 at a predetermined interval as a separate body from the rail piece 1, but directly attached to the rail piece 1. It is good also as a structure which fixes the magnet which becomes.

  Further, in the present embodiment, the joint member is a linear body, and the plurality of rail pieces 1 are articulated through the through holes 1a on both sides of the protrusion 1e. However, the joint member is not limited to this. There is no limitation as long as they can be engaged with each other so that the connection angle to the adjacent rail pieces 1 can be changed. For example, it is a ball joint formed on the rail piece 1 itself and engaged with the adjacent rail piece 1.

  The rail A according to the present invention is advantageous when used for cutting or welding a cylindrical workpiece such as a large-diameter pipe or tank, or a workpiece having a curved workpiece. It is.

A rail 1 rail piece 1a through hole 1b upper surface 1c, 1f, 1g, 1i
Hole 1d Side 1e Protrusion 1h Bottom 2 Rack 3 Bolt 5 Guide 5a, 5b Slope 10 Joint member 11 Bolt 15 Mounting member 15a Bracket 15b Magnet 16 Bolt 20 Carriage 21 Processing torch

Claims (9)

A rail for guiding a carriage equipped with a machining torch along the surface of a workpiece having a workpiece surface including a curved surface,
A rack provided on the upper surface, perpendicular against the hole which is formed through the side surface, in the thickness direction has a center substantially at the same height as the at least one formed on the side surface in the hole on the side surface A plurality of rail pieces having a curved surface or a spherical surface protruding in a direction, facing the through-holes and in contact with each other through the protrusion;
A joint member composed of a bendable linear body, inserted into opposed through-holes in the plurality of parallel rail pieces, and having rail pieces arranged at least at both ends fixed thereto;
An attachment member attached to a rail piece selected from the plurality of parallel rail pieces;
A rail configured to be attached to a workpiece through the attachment member. The rail according to claim 1,
The plurality of parallel rail pieces are formed with two through holes penetrating the side surfaces, and joint members are respectively inserted into the two through holes and at least the rail pieces arranged at both ends are fixed. Rail characterized by that. The rail according to claim 1,
The projections, rails, characterized in that it is formed so as to bulge in the direction perpendicular to the perpendicular and longitudinal directions with respect to the thickness direction of the rail piece. The rail according to claim 1,
The protrusion is formed on both side surfaces where the rail pieces face each other. The rail according to claim 1,
The protrusion is formed only on one side surface where the rail pieces face each other. The rail according to claim 1,
The mounting member is a rail separated from the rail piece and fixed to a continuous rail piece at a predetermined interval. The rail according to claim 1,
The mounting member is integrally formed with each of the rail pieces. The rail according to claim 1,
The rack teeth are formed on at least one side surface of the rail piece facing in the longitudinal direction. The rail according to claim 1,
Each of the plurality of rail pieces is formed with a guide portion that guides the moving direction of the carriage.

Images