JP2018188289A - Conveyor chain - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a conveyor chain which can be easily assembled.SOLUTION: A conveyor chain 15 comprises: a pair of inner link plates 21 arranged to be separated from each other and opposed to each other; a tubular bush connecting the pair of inner link plates 21 to each other; a pair of outer link plates 23 arranged to sandwich the pair of inner link plates 21 from the outside; an extension pin 35 connecting the pair of outer link plates 23 to each other in a state of being rotatably inserted into the bush, and including a pair of extension portions 35a extending to the outside of the pair of outer link plates 23; and a pusher 19 having a pair of attachment plates 36 disposed to sandwich the pair of outer link plates 23 from the outside, and including cutout portions 39 formed in the pair of attachment plates 36 so that the extension portion 35a can be inserted from a direction intersecting with the axial direction of the extension portion 35a.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a conveyor chain provided with an attachment such as a pusher for pushing a conveyed product.

  Conventionally, as this type of conveyor chain, for example, the one shown in Patent Document 1 is known. Such a conveyor chain has a configuration in which a plurality of triangular pusher lugs (attachments) are rotatably attached at a predetermined pitch. A carton conveyor mechanism that conveys a plurality of cartons at the same pitch as the pusher lugs is disposed below the conveyor chain.

  The conveyor chain is synchronized to the carton conveyor mechanism. For this reason, each pusher lug enters the space between adjacent cartons and contacts the upper rear edge of each carton when each carton moves along the transport path. The conveyor chain is driven to circulate at the same speed as the carton transport speed. For this reason, the pusher lug supports the upper rear edge of the carton while moving with the carton. This prevents the upper rear edge portion of the carton from being delayed and deformed when the carton is transported.

Japanese National Patent Publication No. 9-502687

  By the way, in the conveyor chain as described above, a circular through hole and an arc-shaped elongated hole are formed in the pusher lug, and these connecting pins are fixed to the conveyor chain in a state where the connecting pin is passed through the through hole and the elongated hole, respectively. By doing so, the pusher lug is assembled to the conveyor chain. For this reason, there is a problem that the operation of passing the connection pin through the hole formed in the pusher lug is troublesome and the conveyor chain cannot be easily assembled.

  The present invention has been made paying attention to such problems existing in the prior art. The object is to provide a conveyor chain that can be easily assembled.

Hereinafter, means for solving the above-described problems and the effects thereof will be described.
A conveyor chain that solves the above problems includes a pair of inner link plates that are arranged so as to face each other, a cylindrical bush that connects the pair of inner link plates, and a pair of the inner link plates that are outside. A pair of outer link plates arranged so as to be sandwiched between the pair of outer link plates, and a pair of the outer link plates that are rotatably inserted into the bush and that extend to the outside of the pair of outer link plates. And a pair of mounting plates disposed so as to sandwich the pair of outer link plates from the outside, and the pair of mounting plates from a direction intersecting the axial direction of the extending portion. And an attachment formed with a notch part into which the extension part can be inserted.

  According to this configuration, since the attachment plate of the attachment is formed with the cutout portion into which the extension portion can be inserted from the direction intersecting the axial direction of the extension portion, the attachment plate of the attachment is perforated and the pin is inserted into the hole. The conveyor chain can be easily assembled as compared with the case of passing it through.

  The conveyor chain supports the attachment by being interposed between the notch and the extension in a state in which the extension is inserted in a state of being rotatably fitted to the extension. It is preferable to provide a support member.

According to this configuration, the attachment can be stably supported by the support member.
In the conveyor chain, the support member is preferably made of a synthetic resin.

  According to this configuration, since the support member made of synthetic resin is interposed between the notch portion of the attachment and the extension portion of the extension pin, for example, compared to a configuration in which the attachment and the extension portion are formed of metal and these slide. Thus, wear of the attachment and the extension can be suppressed.

The said conveyor chain WHEREIN: It is preferable that the said supporting member has a protrusion part which protrudes inside rather than a pair of said mounting plate.
According to this structure, the protrusion part of a supporting member can be functioned as a spacer for opening the space | interval of a pair of outer link plate and a pair of attachment plate.

  In the conveyor chain, the support member is fitted into the notch, and the shape of the portion of the support member that fits into the notch is non-circular, and the support member at the notch is fitted. The shape of the portion is preferably a shape that matches the shape of the portion of the support member that fits into the notch.

According to this structure, it can suppress that a support member and a notch part rotate relatively. For this reason, wear between the support member and the notch can be suppressed.
In the conveyor chain, it is preferable that a pair of guide rollers is rotatably supported outside the support member in the pair of extension portions.

  According to this structure, a conveyor chain can be stably moved by comprising so that a guide roller may roll on a guide rail.

  According to the present invention, the conveyor chain can be easily assembled.

The perspective view which shows a conveying apparatus provided with the conveyor chain of one Embodiment. The perspective view which shows a part of conveyor chain. The exploded view of FIG. The principal part expanded sectional view of FIG. The principal part expansion perspective view which shows the fitting state of the notch part of a pusher, and the protrusion part of a supporting member.

Hereinafter, an embodiment of a conveyor chain provided in a transport device for transporting a transported object will be described with reference to the drawings.
As shown in FIG. 1, for example, a transport device 11 that transports a transported object H such as food includes a pair of transport rails 12 extending in a horizontal transport direction A, and a transport unit disposed below the pair of transport rails 12. 13. The transport unit 13 includes a pair of sprockets 14 that are spaced apart from each other in the transport direction A, and an endless conveyor chain 15 that is wound around the pair of sprockets 14.

  One of the pair of sprockets 14 that is positioned downstream in the transport direction A is a drive sprocket 14a that is driven to rotate counterclockwise in FIG. 1 by a motor (not shown). Of the pair of sprockets 14, the one located on the upstream side in the conveying direction A is a driven sprocket 14 b that is rotated counterclockwise in FIG. 1 via the conveyor chain 15 by the rotational drive of the driving sprocket 14 a. The conveyor chain 15 is circulated in the counterclockwise direction in FIG. 1 around the pair of sprockets 14 as the drive sprocket 14a is driven to rotate.

  Inside the conveyor chain 15, a pair of upper guide rails 16 that guide the upper part of the conveyor chain 15 are arranged so as to extend in the transport direction A. The pair of upper guide rails 16 are arranged so as to face each other across the pair of sprockets 14 in the width direction Y orthogonal to both the transport direction A and the vertical direction. That is, the pair of upper guide rails 16 are disposed so as to avoid the pair of sprockets 14.

  A lower guide rail 17 that guides the lower portion of the conveyor chain 15 is disposed below the conveyor chain 15 so as to extend in the transport direction A. The conveyor chain 15 includes an endless chain 18 and a plurality of pushers 19 as an example of attachments (five in the present embodiment) attached to the chain 18 at equal intervals in the longitudinal direction. Yes. The pusher 19 is L-shaped when viewed from the width direction Y, and is rotatable about an axis extending in the width direction Y.

  Each pusher 19 sequentially moves between the pair of transport rails 12 toward the downstream side in the transport direction A as the conveyor chain 15 circulates. In this case, a part of each pusher 19 protrudes above the pair of transport rails 12. For this reason, the transported object H placed so as to straddle the pair of transport rails 12 is sequentially pressed toward the downstream side in the transport direction A by the pushers 19, so that the transport object H is placed on the pair of transport rails 12. It is conveyed while sliding toward the downstream side in the conveying direction A.

Next, the configuration of the conveyor chain 15 will be described in detail.
As shown in FIGS. 2 and 4, the conveyor chain 15 includes the chain 18 and a plurality of pushers 19 assembled to the chain 18 as described above. The chain 18 has a plurality of inner links 22 each having a pair of inner link plates 21 arranged so as to be opposed to each other in the width direction Y, and sandwich the pair of inner link plates 21 from the outside in the width direction Y. And a plurality of outer links 24 each having a pair of outer link plates 23.

  The inner link plate 21 of the inner link 22 and the outer link plate 23 of the outer link 24 have a substantially rectangular plate shape in which the chain 18 extends in the longitudinal direction X orthogonal to the width direction Y, and both ends in the longitudinal direction X are rounded. Tinged with The inner link plate 21 and the outer link plate 23 facing each other in the width direction Y are arranged so as to be parallel to each other.

  As shown in FIG. 4, circular bush insertion holes 25 are formed at both ends in the longitudinal direction X of the inner link plate 21 so as to penetrate in the width direction Y which is also the thickness direction of the inner link plate 21. Yes. Two cylindrical bushings 26 are assembled between the pair of inner link plates 21 facing each other in the inner link 22 so as to maintain the distance between the pair of inner link plates 21.

  Both ends of the bushing 26 are fitted to the bushing insertion holes 25 of the pair of inner link plates 21 so as not to rotate. Therefore, the bush 26 connects the pair of inner link plates 21 to each other. The bush 26 is inserted into a cylindrical roller 30 so as to rotatably support the roller 30. That is, the bush 26 is loosely fitted to the roller 30.

  At both ends in the longitudinal direction X of the outer link plate 23, circular pin insertion holes 29 into which cylindrical pins 28 are inserted are formed so as to penetrate in the width direction Y which is also the thickness direction of the outer link plate 23. Has been. The pin 28 is inserted into a bush 26 assembled between a pair of inner link plates 21 of the inner link 22 through a cylindrical sleeve 27 at an intermediate portion other than both ends. The pair of outer link plates 23 of the link 24 are fitted to the pin insertion holes 29 so as not to rotate.

  That is, the pair of outer link plates 23 is arranged so as to rotate with respect to the pair of inner link plates 21 via the pins 28 and the bushes 26 in a state where the pair of inner link plates 21 are sandwiched from the outside in the width direction Y. It is connected freely. In this case, the sleeve 27 disposed between the pin 28 and the bush 26 is made of a synthetic resin and functions as a lubricant that lubricates between the pin 28 and the bush 26. The pin 28 connects the pair of outer link plates 23 to each other.

  As shown in FIGS. 3 and 4, in the conveyor chain 15, the pusher 19 is attached to an extension pin 35 formed by extending a pin 28 in the chain 18. That is, the pin 28 in the position where the pusher 19 is attached in the chain 18 is changed to the extension pin 35 to which the pusher 19 can be attached. The extension pin 35 has a pair of extension portions 35a that are portions extending so as to protrude outward in the width direction Y of the pair of outer link plates 23. Similarly to the pin 28, the extension pin 35 connects the pair of outer link plates 23 in a state where the extension pin 35 is rotatably inserted into the bush 26.

  The pusher 19 includes a pair of rectangular mounting plates 36 disposed so as to sandwich the pair of outer link plates 23 from the outside, and a connecting portion 37 that connects the pair of mounting plates 36 at one end in the longitudinal direction. I have. The connecting portion 37 is formed integrally with the pair of mounting plates 36 and extends from one end portion in the longitudinal direction of the pair of mounting plates 36 so as to form an L shape with the pair of mounting plates 36. The connection part 37 has the flat pressing part 38 which can press the conveyed product H (refer FIG. 1).

  A direction orthogonal to (intersects with) the width direction Y, which is also the axial direction of the extension portion 35 a of the extension pin 35, at the end opposite to the side where the connecting portion 37 extends at one end in the longitudinal direction of the pair of mounting plates 36. A substantially U-shaped cutout portion 39 into which the extension portion 35a can be inserted is formed. The width of the inlet of the notch 39 is narrower than the width of the notch 39 on the back side and wider than the outer diameter of the extension 35a.

  An annular support member 40 is rotatable between the pair of extension portions 35a between the pair of extension portions 35a and the cutout portions 39 of the pair of mounting plates 36 in a state where the pair of extension portions 35a are inserted. Each is arranged in a fitted state. Therefore, the pusher 19 is rotatably supported by the pair of extension portions 35a via the support members 40.

  Each support member 40 is made of a synthetic resin having self-lubricating properties such as polyacetal or ultrahigh molecular weight polyethylene. Each support member 40 is interposed between the notch portion 39 and the extension portion 35a, thereby supporting the pusher 19 while lubricating between the notch portion 39 and the extension portion 35a.

  Each support member 40 has a configuration in which a substantially cylindrical protruding portion 41 that fits into the notch portion 39 and an annular flange portion 42 that is concentric with the protruding portion 41 and has an outer diameter larger than that of the protruding portion 41 are integrally formed. It has become. The length of the protrusion 41 in the width direction Y, which is also the axial direction of the protrusion 41, is longer than the thickness of the mounting plate 36. In the support member 40, the protrusion 41 is fitted into the notch 39 from the outside in the width direction Y of the pair of attachment plates 36.

  In this case, in each support member 40, the flange portion 42 comes into contact with the outer side surface in the width direction Y of the mounting plate 36, and the distal end portion of the protruding portion 41 protrudes inward in the width direction Y from the pair of mounting plates 36. For this reason, the protrusion 41 functions as a spacer that secures a gap S between the outer link plate 23 and the mounting plate 36. In this case, the protruding length of the protruding portion 41 from the mounting plate 36 is set to be longer than the protruding length of the pin 28 from the outer link plate 23.

  That is, the protruding length of the protruding portion 41 from the mounting plate 36 is set such that the size of the gap S is larger than the protruding length of the pin 28 from the outer link plate 23. Therefore, when the pusher 19 rotates about the pair of extension portions 35a, the pusher 19 and the pin 28 do not come into contact with each other.

  As shown in FIG.4 and FIG.5, the protrusion part 41 of each support member 40 has the plane part 41a in two places which oppose on both sides of the center axis line in the surrounding surface of a cylinder. Therefore, the shape of the protrusion 41 which is a portion fitted to the notch 39 in the support member 40 is a non-circular shape when viewed in the width direction Y. On the other hand, when viewed from the width direction Y of the portion of the notch 39 where the protrusion 41 of the support member 40 is fitted, the shape of the protrusion 41 that is the portion of the support member 40 that fits the notch 39 is the width direction. The shape matches the shape when viewed from Y.

  A pair of circular guide rollers 43 are rotatably supported outside the pair of support members 40 in the pair of extending portions 35a in the width direction Y. A circular recess 43 a is formed on the outer side in the width direction Y of the pair of guide rollers 43. An annular stopper 44 for preventing the pair of guide rollers 43 from falling off from the pair of extension portions 35a is fixed to the outer side of the pair of extension portions 35a in the width direction Y from the pair of guide rollers 43. It is mated. In this case, each stopper 44 is accommodated in the recess 43 a of the guide roller 43.

In the conveyor chain 15 of this embodiment, all parts other than the sleeve 27 and the support member 40 are made of metal such as stainless steel.
Next, a method for assembling the conveyor chain 15 will be described.

  As shown in FIGS. 3 and 4, the conveyor chain 15 is assembled by assembling a pusher 19 to the chain 18 after assembling the chain 18. When assembling the chain 18, first, the bush 26 is inserted into the roller 30, and both ends of the bush 26 are fitted into the bush insertion holes 25 of the pair of inner link plates 21 so as not to rotate. . Subsequently, the pins 28 are inserted into the sleeves 27 in the bushes 26 that are non-rotatably fitted into the bush insertion holes 25 of the pair of inner link plates 21.

  Subsequently, in a state where the pair of outer link plates 23 are disposed so as to sandwich the pair of inner link plates 21 from the outside in the width direction Y, both ends of the pins 28 are opposed to the pin insertion holes 29 of the pair of outer link plates 23. To fit each other. In this way, the pair of inner link plates 21 of the inner links 22 adjacent to each other in the longitudinal direction X and the pair of outer link plates 23 of the outer links 24 are alternately and alternately arranged in series via the pins 28 and the bushings 26. The chain 18 is assembled by sequentially connecting.

  At this time, among the plurality of pins 28 in the chain 18, each pin 28 at a plurality of positions where the pusher 19 is assembled is replaced with the extension pin 35. In this case, the plurality of extension pins 35 are arranged at equal intervals in the longitudinal direction X of the chain 18. Subsequently, the pair of extension portions 35a of the extension pin 35 in the chain 18 are paired with a pair of notches of the pusher 19 from a direction orthogonal to (crossing) the axial direction of the extension portion 35a (the same direction as the width direction Y in the present embodiment). 39.

  Subsequently, the width direction Y in a state where the protruding portions 41 of the pair of support members 40 are rotatably fitted to the pair of extension portions 35a in the pair of cutout portions 39 in a state where the pair of extension portions 35a are inserted. Fit from outside. Subsequently, the pair of guide rollers 43 are fitted to the pair of extension portions 35a so as to be rotatable from the outside in the width direction Y rather than the pair of support members 40, respectively.

  Subsequently, the pair of stoppers 44 are fitted into the pair of extension portions 35a in a fixed state from the outside in the width direction Y rather than the pair of guide rollers 43, respectively. As a result, the pusher 19 is assembled to the extension pin 35 of the chain 18. Similarly, when the pushers 19 are sequentially assembled to all the remaining extension pins 35 in the chain 18, the conveyor chain 15 is completed.

Next, the effect | action of the conveyor chain 15 at the time of conveying the conveyed product H with the conveying apparatus 11 is demonstrated.
As shown in FIG. 1, when transporting the transported object H by the transport device 11, first, the drive sprocket 14a is rotationally driven in the counterclockwise direction in FIG. Then, the endless conveyor chain 15 wound around the pair of sprockets 14 circulates and moves around the pair of sprockets 14. Thereby, the pusher 19 located in the upper part in the conveyor chain 15 moves toward the downstream of the conveyance direction A between a pair of conveyance rails 12 in the position aspect in which the press part 38 becomes parallel to a vertical surface.

  At this time, the guide roller 43 located in the upper part of the conveyor chain 15 rolls on the upper guide rail 16 toward the downstream side in the transport direction A while being guided by the upper guide rail 16. For this reason, the circulation movement of the conveyor chain 15 is stabilized. And when the conveyed product H is mounted on a pair of conveyance rail 12, this mounted conveyed product H will be in the downstream of the conveyance direction A by the press part 38 of the pusher 19 located in the upper part in the conveyor chain 15. FIG. It is conveyed so as to be pushed toward it.

  The pusher 19 located at the upper part of the conveyor chain 15 rotates around the extension pin 35 in the process of moving to the lower part of the conveyor chain 15 along the drive sprocket 14a when the conveyed product H has been conveyed. At this time, the notch 39 of the metal pusher 19 and the metal extension pin 35 slide through the support member 40 made of synthetic resin having self-lubricating properties. For this reason, since the metal notch 39 and the metal extension pin 35 do not slide directly, wear of the notch 39 and the extension pin 35 is suppressed.

  When the pusher 19 moves to the lower part of the conveyor chain 15, the pressing portion 38 is in a position mode in which it is parallel to the horizontal plane. The pusher 19 located at the lower portion of the conveyor chain 15 slides on the lower guide rail 17 toward the upstream side in the transport direction A while being guided by the lower guide rail 17 at the pressing portion 38.

  The pusher 19 that has been guided by the lower guide rail 17 rotates around the extension pin 35 in the process of moving to the upper part of the conveyor chain 15 along the driven sprocket 14b. At this time, the notch 39 of the metal pusher 19 and the metal extension pin 35 slide through the support member 40 made of synthetic resin having self-lubricating properties. For this reason, since the metal notch 39 and the metal extension pin 35 do not slide directly, wear of the notch 39 and the extension pin 35 is suppressed.

  When the pusher 19 moves to the upper part of the conveyor chain 15, the pressing portion 38 again becomes a position mode parallel to the vertical surface, and the transported object H placed on the pair of transport rails 12 is moved downstream in the transport direction A. Transport it by pushing it toward you.

According to the embodiment detailed above, the following effects are exhibited.
(1) The conveyor chain 15 includes an extension pin 35 having a pair of extension portions 35a and a pair of attachment plates 36, and the pair of attachment plates 36 from a direction orthogonal to (crossing) the axial direction of the extension portions 35a. And pushers 19 each having a notch 39 into which the extension 35a can be inserted. For this reason, since the extension 35a can be inserted into the notch 39 of the mounting plate 36 of the pusher 19 from a direction orthogonal to (crossing) the axial direction of the extension 35a, a hole is made in the mounting plate 36 of the pusher 19. The conveyor chain 15 can be easily assembled as compared with the case where the pins are passed through the holes. That is, since the pusher 19 can be assembled to the pair of extension portions 35a of the chain 18 after the chain 18 is assembled, the conveyor chain 15 can be easily assembled.

  (2) The conveyor chain 15 is rotatably fitted to the extension portion 35a and is interposed between the notch portion 39 and the extension portion 35a in the state in which the extension portion 35a is inserted. Is provided. For this reason, the pusher 19 can be stably supported by the support member 40.

  (3) In the conveyor chain 15, the support member 40 is made of synthetic resin. That is, a synthetic resin support member 40 having self-lubricating properties is interposed between the notch 39 of the metal pusher 19 and the extension 35 a of the metal extension pin 35. For this reason, compared with the structure which slides in the state which the notch part 39 of the pusher 19 and the extension part 35a of the extension pin 35 contacted, abrasion of the pusher 19 and the extension part 35a can be suppressed. As a result, the life of the conveyor chain 15 can be extended.

  (4) In the conveyor chain 15, the support member 40 has a protruding portion 41 that protrudes inward from the pair of mounting plates 36. For this reason, the protrusion part 41 of the supporting member 40 can be functioned as a spacer for spacing the pair of outer link plates 23 and the pair of attachment plates 36. Therefore, even when the pusher 19 rotates about the pair of extension portions 35 a as the rotation center, the pusher 19 can be prevented from colliding with the pin 28 near the pusher 19.

  (5) In the conveyor chain 15, the shape of the portion of the support member 40 that fits into the notch 39 is a non-circular shape, and the shape of the portion of the notch 39 that fits the support member 40 is the support member 40. This is a shape that matches the shape of the portion that fits into the notch 39. For this reason, when the pusher 19 rotates, it can suppress that the support member 40 and the notch part 39 rotate relatively. Therefore, wear between the support member 40 and the notch 39 can be suppressed.

  (6) In the conveyor chain 15, a pair of guide rollers 43 are rotatably supported outside the support member 40 in the pair of extension portions 35a. For this reason, since the guide roller 43 rolls on the upper guide rail 16 while being guided by the upper guide rail 16 as the conveyor chain 15 is circulated, the conveyor chain 15 can be stably circulated and moved.

(Example of change)
In addition, you may change the said embodiment as follows.
The guide roller 43 may be omitted.

The guide roller 43 may be made of synthetic resin.
The shape of the portion of the support member 40 that fits into the notch 39 may be a perfect circle, a polygon such as a triangle or a quadrangle, or an ellipse.

The protrusion 41 of the support member 40 is not necessarily required to protrude inward from the pair of mounting plates 36.
-The supporting member 40 does not necessarily need to be comprised with a synthetic resin. That is, the support member 40 may be made of, for example, metal, glass, wood, ceramic, stone, paper, nonwoven fabric, or the like.

The support member 40 may be omitted.
-Instead of the stopper 44, a retaining ring, a split pin, a clip, or the like may be used.
As the attachment, in addition to the pusher 19, a box-like container that accommodates and transports the transported object H, a tray that transports the transported object H, and the like may be employed.

The number of pushers 19 in the conveyor chain 15 may be arbitrarily changed.
-In the conveyor chain 15, the several pusher 19 does not necessarily need to be arrange | positioned so that it may become equal intervals in a longitudinal direction.

The roller 30 may be omitted.
The sleeve 27 may be omitted.

  DESCRIPTION OF SYMBOLS 15 ... Conveyor chain, 19 ... Pusher as an example of an attachment, 21 ... Inner link plate, 23 ... Outer link plate, 26 ... Bush, 35 ... Extension pin, 35a ... Extension part, 36 ... Mounting plate, 39 ... Notch part, 40 ... support member, 41 ... projection, 43 ... guide roller.

Claims (6)

A pair of inner link plates arranged to face each other apart from each other;
A cylindrical bush connecting the pair of inner link plates;
A pair of outer link plates arranged to sandwich the pair of inner link plates from the outside;
An extension pin that connects the pair of outer link plates in a state of being rotatably inserted into the bush, and has a pair of extension portions that respectively extend to the outside of the pair of outer link plates;
A pair of mounting plates arranged so as to sandwich the pair of outer link plates from the outside, and the extension portions can be inserted into the pair of mounting plates from a direction intersecting the axial direction of the extension portions. An attachment with each part formed,
A conveyor chain characterized by comprising:   A support member that supports the attachment by being interposed between the notch and the extension in a state in which the extension is inserted in a state of being rotatably fitted to the extension. The conveyor chain according to claim 1.   The conveyor chain according to claim 2, wherein the support member is made of a synthetic resin.   4. The conveyor chain according to claim 2, wherein the support member has a protruding portion that protrudes inward from the pair of mounting plates. 5. The support member fits into the notch,
The shape of the portion that fits into the notch in the support member is a non-circular shape,
The shape of the portion of the cutout portion into which the support member fits is a shape that matches the shape of the portion of the support member that fits into the cutout portion. A conveyor chain according to claim 1.   The conveyor chain according to any one of claims 2 to 5, wherein a pair of guide rollers are rotatably supported outside the support member in the pair of extension portions. .