JP2017032018A - Cable chain joining member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joining member capable of connecting cable chains in which a plurality of chain unit members are connected by elastic connection members, or connecting one chain unit member to a cable chain, without degrading bending performance.SOLUTION: A joining member 10 is used in connecting cable chains constituted by connecting a plurality of chain unit members 20 by bendable elastic connection members 30. The joining member 10 includes a pair of planar portions 11 fixed to lower faces of supporting plates 21b of the adjacent chain unit members 20, and a connection portion 12 connecting the pair of planar portions 11. The connection portion 12 is formed into the groove shape having a substantially U-shaped cross-section opened at a lower part, by one main wall portion 12a and two side wall portions 12b, the main wall portion 12a is in parallel with the planar portions 11 and lower end portions of two side wall portions 12b are connected to the pair of planar portions 11. The main wall portion 12a is disposed between end portions of the elastic connection members 30 of the adjacent chain unit members 20.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cable chain joining member that joins and extends in series a cable chain that bends and guides cables that supply and transmit electric power, signals, fluid, and the like to a movable body that reciprocates linearly with respect to a main body. .

  Patent Document 1 discloses a cable chain formed by connecting a plurality of chain unit members with a band-like bendable elastic connecting member. The chain unit member is configured to connect the lower portions of the pair of side plates opposed to each other with a support plate with a support plate and cover the upper openings of the pair of side plates with a closing member. Further, the elastic connecting member is integrally formed with the support plate of the chain unit member arranged in series to connect the plurality of chain unit members. The cables are disposed and bent and guided in a region surrounded by the pair of side plates, support plates, and closing members of the plurality of chain unit members in series of the cable chain, thereby preventing the cables from being damaged.

Japanese Patent No. 35477881

  In the cable chain described in Patent Document 1, when the cable chain is disposed between the main body and the movable body, the elastic connecting member between the chain unit members is cut at a portion having a required length to thereby remove the cable chain. Determine the length. At this time, if the movable distance of the movable body is to be changed for some reason, it may be necessary to extend the cable chain once determined to have a predetermined length. Here, presentation of a simple means capable of connecting the cable chains in series to increase the length of the cable chain has been demanded.

  In view of such a problem, an object of the present invention is to join cable chains in which a plurality of chain unit members are connected by an elastic connection member, or one chain unit member to a cable chain without connecting the bending performance. It is to provide a member.

  A first aspect of the present invention includes a pair of side plates opposed to each other at a predetermined interval, a support plate connecting the lower portions of the pair of side plates, and a cover member capable of closing the upper portions of the pair of side plates. A plurality of chain unit members arranged in series and two cable chains connected by elastic connecting members that can bend between the support plates are arranged in series or connected, or one chain unit member is connected to the cable chain. A cable chain joining member to be connected, the joining member being in contact with and fixed to the lower surface of the support plate of the adjacent chain unit member, and a connecting portion for connecting the pair of planar portions. The connecting portion is formed into a groove shape having a substantially U-shaped cross section opened downward by combining one bendable main wall portion and two side wall portions, and the main wall portion is Parallel to the pair of plane portions The lower end portions of the two side wall portions are respectively connected to the pair of flat surface portions, and the main wall portion is interposed between the end portions of the elastic connecting members of the adjacent chain unit members. In this state, the adjacent chain unit members are connected to each other.

  According to the first invention, at the opposite ends of the two cable chains arranged in series, the pair of flat portions of the joining member are respectively brought into contact with and fixed to the lower surface of the support plate of the adjacent chain unit member. Two cable chains can be connected. At this time, a bendable main wall portion is interposed between the end portions of the elastic connecting members of the adjacent chain unit members, so that it is possible to bend between the adjacent chain unit members as well as the general portion of the cable chain. . As a result, the cable chain can be connected without hindering the bending performance of the cable chain, and the length of the cable chain can be easily increased. In addition, when one chain unit member is connected to the end of the cable chain, it is possible to connect the cable chain without impairing the bending performance of the cable chain, and the length of the cable chain can be easily increased. Can do.

  According to a second aspect of the present invention, in the first aspect, the fixing of the flat portion to the support plate of the chain unit member is performed at an end portion of the flat portion that is perpendicular to a direction in which the cable chain extends. An engagement member comprising: a first engagement portion that engages; a second engagement portion that engages with the upper side of the side plate; and a main portion that connects the first engagement portion and the second engagement portion. It is made by this.

  According to the second aspect of the present invention, it is only necessary to engage the engaging member between the end portion of the flat portion and the upper portion of the side plate, so that the joining member can be easily attached to the chain unit member.

  According to a third aspect of the present invention, in the first aspect or the second aspect, the upper surface of the main wall portion extends from the cable chain when the joining member is attached between the adjacent chain unit members. R is formed in a corner portion in the direction and protrudes upward from the upper surface of the elastic connecting member.

  According to the third aspect of the invention, the main wall portion is disposed with the upper surface protruding upward from the upper surface of the elastic connecting member between the elastic connecting member terminal portions of the adjacent chain unit members connected by the joining member. Is done. The opposite elastic connecting member terminal portions of the adjacent chain unit members are in a cut state, so the corner portion has a sharp edge, but on the corner portion on the elastic connecting member terminal portion side of the main wall portion protruding upward R is formed. As a result, the cables arranged in the region surrounded by the pair of side plates, support plates, and closing members of the plurality of chain unit members in series in the cable chain are less likely to come into contact with the corner portion of the sharp edge and wear. Not easily damaged.

  According to a fourth invention of the present invention, in any one of the first to third inventions, the joining member is formed of the same material as the elastic connecting member, and the main wall portion is formed of the elastic connecting member. A portion of the chain unit member adjacent to the member corresponding to the space between the support plates, the length in the direction in which the cable chain extends, the length in the direction perpendicular to the direction in which the cable chain extends, and the thickness are substantially It is characterized by being formed identically.

  According to the fourth invention, the length and thickness of the bent portions of the elastic connecting member and the joining member are substantially the same, the bending characteristics between the chain unit members connected by the elastic connecting member, and the joining member The bending characteristics between the connected chain unit members are substantially equal. As a result, the bending properties of the entire extended cable chain can be smoothly guided without bending depending on the site.

It is a disassembled perspective view which shows the joining member of the cable chain which concerns on one Embodiment of this invention. It is a perspective view which shows the state which connected the cable chain with the joining member of the said embodiment. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2. FIG. 4 is a sectional view taken along the line IV-IV in FIG. 2. It is a VV arrow line sectional view of Drawing 1. It is a perspective view which shows a cable chain.

  1 to 6 show an embodiment of the present invention. FIG. 6 shows the overall shape of the cable chain 1 that can be connected and adjusted in length using a cable chain joining member (hereinafter referred to as “joining member”) according to the present invention. FIGS. 1 and 2 show a portion of the cable chain 1 that is connected by using the joining member 10. In each figure, the up-down direction and the left-right direction are shown by arrows with the extending direction of the cable chain 1 as the front-rear direction. In the following description, the description regarding the direction is made based on this direction.

  As shown in FIG. 1, the cable chain 1 has a structure in which a plurality of chain unit members 20 are connected by a belt-like elastic connecting member 30. The chain unit member 20 includes a substantially U-shaped main body portion 21 whose section cut by a plane perpendicular to the front-rear direction opens upward, and a door portion 22 that opens and closes the opening of the main body portion 21. Here, the door portion 22 corresponds to a “cover member” in the claims.

  The main body 21 is formed of a relatively hard resin such as 66 nylon, for example, and has a pair of opposing side plates 21a and a support plate 21b that connects the lower portions of the pair of side plates 21a. As shown in FIG. 3, tapered end surfaces 21a1 that form V-shaped gaps that open downward when the chain unit members 20 are connected in series are provided at both ends of the lower side of the side plate 21a. It has been. The tapered surface 21a1 allows the adjacent chain unit members 20 to rotate relative to each other about a bent portion 32 of an elastic connecting member 30 described later, and the tapered surfaces 21a1 come into contact with each other during the rotation process. It works to regulate the rotation angle.

  As shown in FIG. 4, the lower part of the side plate 21a provided with the tapered surface 21a1 is formed as a thick part 21a2 having a thicker thickness in the left-right direction. Between the thick portions 21a2 of the left and right side plates 21a, a support plate 21b is bridged and attached to a portion of the thick portion 21a2 that is slightly closer to the center in the vertical direction. The support plate 21b has a thickness substantially equal to that of the general portion of the side plate 21a, and the length in the front-rear direction is shorter than the length in the front-rear direction of the lower end portion of the side plate 21a. As shown in FIGS. 3, 4, and 6, the support plate 21 b is provided with a total of five through holes 21 b 1, one in the center and two in the front-rear direction at the left and right ends. The through-hole 21b1 has a substantially cylindrical shape, and more specifically has a shape in which a narrow isosceles trapezoid is stacked on a wide isosceles trapezoid whose cross section is cut by a plane including the shaft. This is because when the elastic connecting member 30 described later is integrally formed on the support plate 21b by two-color molding, a part of the elastic connecting member 30 is filled in the through-hole 21b1 and fixed to have an anchor effect. Is.

  A space 21a3 is formed between the lower surface of the support plate 21b and the lower end of the side plate 21a. On the connecting portion side of the thick portion 21a2 with the support plate 21b, a groove-shaped notch portion 21a4 extending in the front-rear direction is a trapezoidal shape in which the transverse cross section is substantially a right angle from the lower end portion upward. Is provided. The notch 21a4 is provided at a position where the front-rear direction corresponds to the support plate 21b, and the length in the front-rear direction is set slightly longer than the length in the front-rear direction of the support plate 21b. The notch portion 21a4 is integrated with the space portion 21a3 to form a space that can receive the columnar convex portion 11a of the flat surface portion 11 of the joining member 10 described later. At both ends in the front-rear direction of the lower part of the side plate 21a before and after the notch 21a4, there are provided closing portions 21a5 that incline with the tapered surface 21a1 and close both ends in the front-rear direction of the notch 21a4. The closing part 21a5 has a function of positioning the flat part 11 of the joining member 10 in the front-rear direction.

  As shown in FIGS. 2 and 4, the upper end portion of the right side plate 21a is bent leftward to form an upper projecting portion 21a6, and a shaft portion 21a7 having an axial line in the front-rear direction is provided at the left end portion. It has been. The shaft portion 21a7 is a portion that rotatably supports a shaft support portion 22a of the door portion 22 described later. A groove-like upper locking recess 21a8 extending in the front-rear direction is provided at the left end which is the end of the R shape formed between the upper surface portion of the upper overhang portion 21a6 and the right side surface (outer surface) of the side plate 21a. ing. The upper locking recess 21a8 is a portion for engaging an upper engagement portion 41 of an engagement member 40 described later.

  As shown in FIGS. 2 and 4, the upper end of the left side plate 21a is bent rightward to form an upper overhanging portion 21a6, and the right end has a horizontal cross section extending in the front-rear direction. The locking projection 21a10 is provided. The locking projection 21a10 locks the locking recess 22b provided at the end opposite to the shaft portion 21a7 of the door portion 22 when the door portion 22 described later rotates about the shaft portion 21a7. It is for holding. A groove-shaped upper locking recess 21a8 extending in the front-rear direction is provided at the right end which is the end of the R shape formed between the upper surface of the upper overhanging portion 21a6 and the left side surface (outer surface) of the side plate 21a. ing. The function of the upper locking recess 21a8 is the same as that of the upper protruding portion 21a6 on the right side.

  The door portion 22 is a member formed from a relatively soft resin such as 12 nylon, and is formed by two-color molding simultaneously with the molding of the elastic connecting member 30 described later. In this case, since the door portion 22 is formed in a non-fused state with respect to the main body portion 21 due to the difference in material, the shaft support portion 22a is rotatably supported with respect to the shaft portion 21a7, and the locking convex portion. The locking recess 22b can be engaged and disengaged with respect to 21a10. Thereby, the door part 22 can open and close the upper opening of the main-body part 21 by rotation operation with respect to the main-body part 21 centering on the axial part 21a7. The door portion 22 may be molded and assembled separately from the main body portion 21. The door portion 22 has a drum-like shape with a constricted central portion in a top view, and a concave portion is formed on the upper surface. This is for the purpose of saving material and preventing sink marks due to meat theft. It is not limited to.

  As shown in FIGS. 1 to 4, a band-like elastic connecting member 30 is formed in two colors and integrated on the upper surface of the support plate 21 b of the main body 21 arranged in series. The elastic connecting member 30 is formed of a relatively soft resin such as 12 nylon, as with the door portion 22. Here, the elastic connecting member 30 is formed in a non-fused state with respect to the main body portion 21, but since the elastic connecting member 30 is partially filled in the through hole 21 b 1 of the support plate 21 b and solidified, the anchor effect. Connected by The length of the elastic connecting member 30 in the left-right direction is slightly shorter than the length of the support plate 21b in the left-right direction. As shown in FIG. 3, the thickness of the general portion 31 that is a portion that contacts the upper surface of the support plate 21 b of the elastic connecting member 30 is about half of the thickness of the support plate 21 b. The thickness of the bent portion 32 is about half the thickness of the general portion 31. A central portion in the front-rear direction of the bent portion 32 is disposed at a position corresponding to the upper end portion of the tapered surface 21a1 at the contact portion of the side plate 21a of the adjacent main body portion 21. As a result, the adjacent main body portions 21 can be rotated around the bent portion 32 in the direction in which the tapered surfaces 21a1 abut each other. An R portion 32a for avoiding stress concentration at the time of bending is provided at the front and rear end portions on the lower side of the bending portion 32. The elastic connecting member 30 may be formed separately from the main body 21 and attached by adhesion, welding, mechanical means, or the like.

  As shown in FIGS. 1 and 3 to 5, the joining member 10 is a member formed of a relatively soft resin such as 12 nylon. The material of the resin is not limited to 12 nylon, but it is desirable to use the same resin as the elastic connecting member 30 in order to exhibit the same bending performance as the elastic connecting member 30. The joining member 10 includes a pair of flat surface portions 11 that are parallel to each other in the left-right direction as viewed from above, and a connecting portion 12 that connects the pair of flat surface portions 11. The flat surface portion 11 is set such that the thickness of the general portion is substantially equal to the height of the space portion 21a3, and columnar convex portions 11a having a right triangle shape extending in the front-rear direction are provided at the left and right ends. Yes. The columnar convex portion 11a is formed so as to fit into the notch portion 21a4 when the flat surface portion 11 is disposed in the space portion 21a3 of the main body portion 21. On the upper surface of the general portion of the flat portion 11, eight concave portions 11b having a rectangular shape in a top view are provided. The recess 11b is mainly for stealing meat and preventing sink marks. The length in the front-rear direction of the plane portion 11 is substantially equal to the length in the front-rear direction of the space portion 21a3, and the length in the left-right direction of the plane portion 11 is substantially the same as the length in the left-right direction obtained by adding the left and right cutout portions 21a4 to the space portion 21a3. equal. That is, when the upper surface of the flat portion 11 is disposed in contact with the lower surface of the support plate 21b, the lower surface of the flat portion 11 is substantially flush with the lower surface of the side plate 21a. Lower locking recesses 11 c are provided on the lower surfaces of the left and right end portions of the flat portion 11. The depth of the lower locking recess 11 c is about half of the thickness of the general portion of the flat surface portion 11, and the length in the front-rear direction and the length in the left-right direction of the lower locking recess 11 c are the lower engagement portions of the engagement member 40. It is set to such an extent that 42 can be engaged.

  The connecting portion 12 includes a main wall portion 12a extending in parallel with the plane portion 11 in the left-right direction, and a side wall portion 12b extending downward from the front and rear end portions of the main wall portion 12a, and has a substantially transverse cross section that opens downward. It is formed in a U-shaped groove shape. The thickness of the main wall portion 12a is approximately the same as the thickness of the portion not including the R portion 32a at the end of the bent portion 32 of the elastic connecting member 30, and about 1/3 of the thickness of the flat portion 11. Yes. The length of the main wall portion 12a in the front-rear direction is the length between the support plates 21b of the adjacent chain unit members 20, that is, a constant thickness portion excluding the R portions 32a before and after the bent portion 32 (from the R end to the R end). And the length of the upper end of the side wall 12b is set to a length obtained by adding the length in the front-rear direction. In other words, the length of the thin portion between the side wall portions 12b of the main wall portion 12a is approximately equal to the length of the constant thickness portion excluding the R portions 32a before and after the bent portion 32. The length in the left-right direction of the main wall portion 12a is set slightly equal to the length in the left-right direction of the elastic connecting member 30 slightly shorter than the length in the left-right direction of the support plate 21b. This is intended to develop a bending performance equivalent to the portion connected by the elastic connecting member 30 when the joining member 10 is disposed between the chain unit members 20. R is formed in the corner part before and behind the main wall part 12a.

  The side wall portion 12b has a U-shaped groove-shaped inner surface extending vertically downward from the main wall portion 12a so that the thickness gradually increases from the upper end portion to the lower end portion, and the U-shaped groove shape The outer surfaces are formed obliquely so as to open toward each other downward. The thickness of the upper end portion is about twice the thickness of the general portion of the main wall portion 12a, and the thickness of the lower end portion is substantially the same as the thickness of the flat portion 11. The lower end portions of the side wall portions 12b are respectively connected to the pair of flat surface portions 11 to constitute a joining member 10 having a hat-shaped cross section in the front-rear direction.

  As shown in FIGS. 1 to 4, the engagement member 40 is a plate spring member made of metal such as stainless steel, and includes a plate-shaped main portion 43, an upper engagement portion 41, and a lower engagement portion 42. Have. The engaging member 40 can also be formed of resin or the like. The size of the main body 43 is such that the length in the front-rear direction is about ½ of the length in the front-rear direction of the side plate 21a, and the length in the vertical direction is about the same as the length in the front-rear direction of the side plate 21a. The upper engagement portion 41 has a form in which a cylindrical portion that is bent in the vertical direction from the upper end portion of the main body portion 43 to the main body portion 43 and that extends in the front-rear direction is formed at the tip. The lower engaging portion 42 has a form in which a cylindrical portion that is bent in the vertical direction in the same direction as the upper engaging portion 41 from the upper end portion of the main portion 43 and extends in the front-rear direction is formed. The cylindrical portion of the upper engaging portion 41 is engaged with the upper locking concave portion 21 a 8 of the main body portion 21, and the cylindrical portion of the lower engaging portion 42 is engaged with the lower locking concave portion 11 c of the joining member 10 attached to the main body portion 21. The main body 43 is configured to come into contact with the outer surface of the side plate 21a when combined. At this time, the joining member 10 is pressed and supported by the spring force of the engaging member 40 with respect to the main body 21. Here, the upper engagement portion 41 and the lower engagement portion 42 correspond to a “second engagement portion” and a “first engagement portion” in the claims, respectively.

  A procedure for connecting the cable chains 1 using the joining member 10 will be described based on a case where the chain unit member 20B and the chain unit member 20C in FIGS. 1 to 3 are connected. First, as shown in FIG. 3, the elastic connecting member 30 rear end portion of the chain unit member 20B is cut along the rear end portion of the support plate 21b, and the elastic connecting member 30 front end portion of the chain unit member 20C is supported on the support plate. Cut along the front end of 21b. Next, the joining member 10 is fitted into the space 21a3 below the support plate 21b in a state where the chain unit member 20B and the chain unit member 20C are adjacent to each other. At this time, the upper surface of the flat portion 11 of the joining member 10 abuts on the lower surface of the support plate 21b, and the connecting portion 12 of the joining member 10 is elastically connected between the rear end portion of the elastic connecting member 30 of the chain unit member 20B and the chain unit member 20C. It is disposed between the front end portion of the member 30. In this state, the upper surface of the main wall portion 12a of the connecting portion 12 protrudes slightly upward from the upper surfaces of the chain connecting member 20B and the elastic connecting member 30 of the chain unit member 20C. The degree of protrusion is about 1/3 to 1/2 of the wall thickness of the main wall portion 12a. This protrusion makes it difficult for the cables to come into contact with the corners of the rear end portion of the elastic connecting member 30 of the chain unit member 20B and the front end portion of the elastic connecting member 30 of the chain unit member 20C, and the cables are less susceptible to damage such as wear. . This is because the corner portions before and after the main wall portion 12a of the connecting portion 12 with which the cables abut are formed with R so that even if the cables abut against and slide, they are not rubbed strongly. Finally, by engaging the four engaging members 40 between the lower locking recess 11c of the joining member 10 and the upper locking recess 21a8 of the main body 21, the chain unit member 20B and the chain unit member 20C are engaged. The joining member 10 is steadily held. The procedure for connecting one chain unit member 20 to the cable chain 1 using the joining member 10 is basically the same as the procedure for connecting the cable chains 1 to each other.

  The present embodiment configured as described above has the following operational effects. Two cables are obtained by fixing the pair of flat portions 11 of the joining member 10 to the lower surface of the support plate 21b of the adjacent chain unit member 20 at the opposite ends of the two cable chains 1 arranged in series. Chain 1 can be connected. At this time, between the end portions of the elastic connecting members 30 of the adjacent chain unit members 20, a bendable main wall portion 12 a is interposed, so that the adjacent chain unit members 20 can be connected to each other in the same manner as the general portion of the cable chain 1. Bending is possible. As a result, the cable chain 1 can be connected without hindering the bending performance of the cable chain 1, and the length of the cable chain 1 can be easily increased. In addition, when one chain unit member 20 is connected to the end of the cable chain 1, the connection can be made without hindering the bending performance of the cable chain 1 as described above, and the length of the cable chain can be simply increased. Can be long.

  The flat portion 11 of the joining member 10 is fixed to the support plate 21 b of the chain unit member 20 by pressing and supporting the flat portion 11 with the spring force of the engaging member 40 with respect to the main body portion 43. Thereby, the joining member 10 can be easily and steadily attached to the chain unit member 20. Further, the upper surfaces of the main wall portion 12 a and the side wall portion 12 b of the joining member 10 are connected from the upper surface of the elastic connecting member 30 between the end portions of the opposing elastic connecting members 30 of the adjacent chain unit members 20 connected by the joining member 10. It is arranged so as to protrude upward. As a result, the cables arranged in the region surrounded by the pair of side plates 21 a, the support plate 21 b, and the door portion 22 of the plurality of chain unit members 20 in series of the cable chain 1 are connected to the terminal corner portion of the elastic connecting member 30. It becomes difficult to come into contact with, and it is difficult to receive damage such as wear.

  Further, the bent portion 32 of the elastic connecting member 30 and the main wall portion 12a of the joining member 10 are formed with substantially the same material, length in the front-rear direction, length in the left-right direction, and wall thickness. Has characteristics. As a result, the bending properties of the entire cable chain connected and extended can be smoothly guided to bend the cables without depending on the portion.

  As mentioned above, although specific embodiment was described, this invention is not limited to those external appearances and structures, A various change, addition, and deletion are possible in the range which does not change the summary of this invention. For example, the following can be mentioned.

  1. In the above embodiment, 12 nylon, which is the same resin as the elastic connecting member 30, is used for the joining member 10. However, the present invention is not limited to this, and a flexible polypropylene resin or elastomer resin may be used. When a resin different from the elastic connecting member 30 is used, the thickness structure of the connecting portion 12 is adjusted so that the bending characteristics of the bent portion 32 of the elastic connecting member 30 and the connecting portion 12 of the joining member 10 match. Is desirable for ensuring durability.

  2. In the said embodiment, when connecting the two cable chains 1, the case where the one chain unit member 20 was connected to the one end part of the one cable chain 1 was demonstrated. However, the present invention is not limited to this, and the same procedure is applied to the case where three or more cable chains 1 are joined together by the joining member 10 and the case where one chain unit member 20 is connected to both ends of one cable chain 1. Needless to say, the connection is possible.

  3. In the above embodiment, the engaging member 40 is used to attach the flat surface portion 11 of the joining member 10 to the chain unit member 20. However, the present invention is not limited thereto, and the flat surface portion 11 is fixed to the support plate 21b with screws or the like. Also good.

DESCRIPTION OF SYMBOLS 1 Cable chain 10 Joining member 11 Plane part 12 Connection part 12a Main wall part 12b Side wall part 20 Chain unit member 21 Main body part 21a Side plate 21b Support plate 22 Door part (cover member)
30 elastic connecting member 32 bent portion 40 engaging member 41 upper engaging portion (second engaging portion)
42 Lower engagement portion (first engagement portion)
43 Main part

Claims (4)

A plurality of chain unit members each having a pair of side plates facing each other at a predetermined interval, a support plate for connecting lower portions of the pair of side plates, and a cover member capable of closing the upper portions of the pair of side plates are connected in series. Two cable chains that are arranged and connected by elastic connecting members that can be bent between the support plates are arranged and connected in series, or one chain unit member is connected to the cable chain. And
The joining member includes a pair of flat portions fixed in contact with the lower surface of the support plate of the adjacent chain unit member, and a connecting portion that connects the pair of flat portions,
The connecting portion is formed in a groove shape having a substantially U-shaped cross section that is opened downward by combining one bendable main wall portion and two side wall portions, and the main wall portion is the pair of plane portions. Extending in parallel with each other, the lower end portions of the two side wall portions are respectively connected to the pair of plane portions,
The main wall portion is a cable chain joining member formed such that adjacent chain unit members are connected in a state of being interposed between end portions of the elastic connecting members of adjacent chain unit members.   In Claim 1, the fixation of the plane part to the support plate of the chain unit member is a first engagement part that engages an end of the plane part in a direction perpendicular to the direction in which the cable chain extends, A cable chain joining member formed by an engaging member comprising: a second engaging portion that engages with the upper side of the side plate; and a main portion that connects the first engaging portion and the second engaging portion.   In Claim 1 or Claim 2, when the said joining member is attached between the said adjacent chain unit members, R is formed in the corner part of the direction where the said cable chain extends on the upper surface of the said main wall part. A cable chain joining member protruding upward from an upper surface of the elastic connecting member. 4. The chain unit member according to claim 1, wherein the joining member is made of the same material as the elastic connecting member, and the main wall portion is adjacent to the elastic connecting member. The cable chain in which the portion corresponding to between the support plates, the length in the direction in which the cable chain extends, the length in the direction perpendicular to the direction in which the cable chain extends, and the wall thickness are formed substantially the same. Joining member.

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