Chain

Abstract

A chain has: a multitude of first links that are pivotally connected to each other and form a first helical link connection that extends helically; a multitude of second links that are pivotally connected to each other and form a second helical link connection that extends helically; and a multitude of connecting components that link the first links and the second links, which correspond one-to-one to the first links, to connect the first helical link connection and the second helical link connection and to form a double helix structure.

Description

TECHNICAL AREA

[0001] The present revelation concerns a chain. TECHNICAL BACKGROUND

[0002] For example, patent document 1 discloses a chain that is able to be bent in a variety of directions, from the perspective of an extension direction (direction of movement). DOCUMENT OF THE STATE OF TECHNOLOGY PATENT DOCUMENT

[0003] Patent document 1: JP-A-7-4473 SUMMARY OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION

[0004] However, in the case of the chain described in patent document 1, a drive source, such as a gear, that engages with the chain must have a specific shape. Alternatively, the chain must be fitted with an option, such as a roller, to engage with the drive source. Therefore, the chain has limited versatility.

[0005] Therefore, it is a task of the present revelation to provide a highly versatile structure which, as it is, can be used in a chain which can be bent in a multitude of directions, from the perspective of one extension direction. SOLUTIONS TO THE PROBLEMS

[0006] To solve the aforementioned problems, according to one aspect of the present disclosure, a chain is provided which has the following features: a multitude of first links that are pivotably connected to each other and form a first spiral link connection that extends spirally; a multitude of second links, pivotally connected to one another and forming a second spiral link connection that extends spirally; and a multitude of connecting components that link the first links and the second links, which correspond one-to-one to the first links, in order to connect the first helical link connection and the second helical link connection and to form a double helix structure. IMPACT OF THE INVENTION

[0007] According to the present disclosure, it is possible to provide a highly versatile structure which, as it is, can be used in a chain that can be bent in a multitude of directions, from the perspective of the extension direction. BRIEF DESCRIPTION OF THE DRAWINGS Fig. Figure 1 is a perspective view of part of a chain according to a first embodiment of the present disclosure. Fig. Figure 2 is a top view of a part of the chain according to the first embodiment. Fig. Figure 3 is a perspective exploded view of a part of the chain according to the first embodiment. Fig. 4A is a perspective view of a multitude of first links in a state where they are connected to each other. Fig. 4B is a front view of a multitude of first links in a state in which they are connected to each other (first spiral link connection). Fig. 4C is a perspective exploded view of the multitude of first links. Fig. 5A is a perspective view of a multitude of second members in a state where they are connected to each other. Fig. 5B is a front view of a multitude of second links in a state in which they are connected to each other (second spiral link connection). Fig. 5C is a perspective exploded view of a multitude of second links. Fig. Figure 6 is a perspective view showing a first and a second spiral link connection forming a double helix structure. Fig. Figure 7 is a perspective view showing a first and second member in a state where they are connected via a connecting component. Fig. Figure 8 is a perspective exploded view to describe a connection of a multitude of first and second links via a multitude of connecting components. Fig. 9A is a cross-sectional view of the chain along a line S1-S1, which is in Fig. 1 is shown. Fig. 9B is a cross-sectional view of the chain along a line S2-S2, which is in Fig. 1 is shown. Fig. 10A is a perspective view showing part of the chain bent to one side in a width direction. Fig. 10B is a perspective view showing part of the chain that is bent to the other side in the width direction. Fig. 10C is a perspective view showing part of the chain bent to one side in a thickness direction. Fig. 10D is a perspective view showing part of the chain that is bent to the other side in the thickness direction. Fig. Figure 11 is a perspective view showing the chain according to the first embodiment in a state in which it engages with a plurality of sprockets. Fig. Figure 12 is a perspective view showing the chain according to the first embodiment and a rotating body as an example. Fig. Figure 13 is a perspective view showing the chain according to the first embodiment and another example of rotating bodies. Fig. Figure 14 is a perspective view of an endless chain according to the first embodiment. Fig. Figure 15 is a perspective view of part of a chain according to a second embodiment. Fig. Figure 16 is a top view of a part of the chain according to the second embodiment. Fig. Figure 17 is a perspective exploded view of part of the chain according to the second embodiment. Fig. 18A is a front view of a multitude of first links connected together (first spiral link connection). Fig. 18B is a front view of a multitude of second links connected to each other (second spiral link connection). Fig. 19A is a cross-sectional view of the chain along a line S3-S3, which is in Fig. 15 is shown. Fig. 19B is a cross-sectional view of the chain along a line S4-S4, which is in Fig. 15 is shown. Fig. Figure 20 is a perspective view of part of a chain according to a third embodiment. Fig. Figure 21 is a perspective exploded view of a part of the chain according to the third embodiment. Fig. 22A is a front view of each of a multitude of first links connected to each other (first spiral link connection). Fig. 22B is a front view of each of a multitude of second links connected to each other (second spiral link connection). Fig. 23A is a cross-sectional view of the chain along a line S5-S5, which is in Fig. 20 is shown. Fig. 23B is a cross-sectional view of the chain along a line S6-S6, which is in Fig. 20 is shown. Fig. Figure 24 is a perspective view of part of a chain according to a fourth embodiment. Fig. Figure 25 is a perspective exploded view of a part of the chain according to the fourth embodiment. Fig. 26A is a front view of each of a multitude of first links connected to each other (first spiral link connection). Fig. 26B is a front view of each of a multitude of first links connected to each other (first spiral link connection). Fig. 27A is a cross-sectional view of the chain along a line S7-S7, which is in Fig. 24 is shown. Fig. 27B is a cross-sectional view of the chain along a line S8-S8, which is in Fig. 24 is shown. Fig. Figure 28 is a perspective view of part of a chain according to a fifth embodiment. Fig. Figure 29 is a perspective exploded view of part of the chain according to the fifth embodiment. Fig. 30A is a front view of each of a multitude of first links connected to each other (first spiral link connection). Fig. 30B is a front view of each of a multitude of second links connected to each other (second spiral link connection). Fig. Figure 31 is a perspective exploded view to describe a connection of a multitude of first and second links via a multitude of connecting components. Fig. Figure 32 is a perspective view of part of a chain according to a sixth embodiment. Fig. Figure 33 is a perspective view of a first and second connecting component in the chain according to the sixth embodiment. Fig. Figure 34 is a perspective view showing a first and second link in a state where they are connected via connecting components. Fig. 35 is a cross-sectional view of the chain along a line S9-S9, which is in Fig. 32 is shown. Fig. Figure 36 is a perspective view showing another example of a connector. Fig. Figure 37 is a perspective view, which shows yet another example of a connecting piece. Fig. Figure 38 is a perspective view of part of a chain of an example variation. Fig. 39 is a perspective view of part of a chain as another example variation. Fig. 40 is a perspective view of part of a chain as yet another example variation. DETAILED DESCRIPTION

[0008] A chain according to one aspect of the present revelation has: a plurality of first links pivotally connected to one another and forming a first helical link connection extending helically; a plurality of second links pivotally connected to one another and forming a second helical link connection extending helically; and a plurality of connecting elements that join the first links and the second links, which correspond one-to-one to the first links, to connect the first helical link connection and the second helical link connection and to form a double helix structure.

[0009] According to such an aspect, it is possible to provide a highly versatile structure which, as it is, can be used in a chain that can be bent in a variety of directions, from the perspective of the extension direction.

[0010] For example, each first link has one side to which an adjacent first link is connected, and has another side to which another adjacent first link is connected; the first link pivots about a first pivot centerline with respect to the adjacent first link, and the first link pivots about a second pivot centerline with respect to the other adjacent first link, extending in a direction different from the first pivot centerline, from the perspective of an extension direction of the chain.Furthermore, each second member has one side to which an adjacent second member is connected, and has another side to which another adjacent second member is connected; the second member pivots about a third pivot centerline with respect to the adjacent second member; and the second member pivots about a fourth pivot centerline with respect to the other adjacent second member, extending in a direction different from the third pivot centerline from the perspective in the direction of extension.Furthermore, the connecting components connect the first spiral link connection and the second spiral link connection in such a way that: the first pivot centerline of each of the first links and the third pivot centerline of the corresponding second links are located on the same straight line; and the second pivot centerline of each of the first links and a fourth pivot centerline of the corresponding second links are located on the same straight line.

[0011] For example, the chain can have the following: as connecting components, first and second pins. Each of the first pins connects and supports the two successive first links pivotally relative to each other about the first pivoting centerline, and connects and supports the two successive second links pivotally relative to each other about the third pivoting centerline. Each of the second pins connects and supports the two successive first links pivotally relative to each other about the second pivoting centerline, and connects and supports the two successive second links pivotally relative to each other about the fourth pivoting centerline.

[0012] For example, the chain may have the following as connecting components: first and second link links. Each of the first link links has a first link support that pivotally connects and supports the two successive first links with respect to each other about the first pivot centerline, a second link support that pivotally connects and supports the two successive second links with respect to each other about the third pivot centerline, and a main body that has a space passing through it in one direction of extension of the chain.Each of the second connecting pieces has a third link support that pivotally connects and supports the two successive first links with reference to each other around the second pivot centerline, a fourth link support that pivotally connects and supports the two successive second links with reference to each other around the fourth pivot centerline, and a main body that has a space passing through it in one extension direction of the chain.

[0013] For example, each of the first pivot centerlines and a corresponding one of the second pivot centerlines are perpendicular to each other at an angle of 90 degrees when viewed in the direction of extension.

[0014] For example, each of the first pivot centerlines and a corresponding one of the second pivot centerlines intersect at an angle of 60 degrees when viewed in the direction of extension.

[0015] For example, each of the first links and the second links can have an L-shape, viewed in one direction of extension of the chain, such that the contours of the first spiral link connection and the second spiral link connection each have a rectangular shape, viewed in one direction of extension of the chain.

[0016] For example, each of the first links and the second links can have an arc shape when viewed in one direction of extension of the chain, such that the contours of the first spiral link connection and the second spiral link connection each have a circular shape when viewed in one direction of extension of the chain.

[0017] For example, each of the first and second members can have the same shape.

[0018] For example, the first members can be a variety of types of first members that have different shapes from each other, and the second members can be a variety of types of second members that have different shapes from each other.

[0019] For example, the multitude of types of first members and the multitude of types of second members can have members of the same shape.

[0020] Below, a multitude of embodiments according to the present disclosure are described with reference to the drawings. (First embodiment)

[0021] Fig. Figure 1 is a perspective view of part of a chain according to a first embodiment of the present disclosure. Fig. Figure 2 is a top view of a part of the chain according to the first embodiment. Fig. Figure 3 is a perspective exploded view of the chain according to the first embodiment.

[0022] It should be noted that the XYZ orthogonal coordinate system shown in the drawings serves to facilitate understanding of the embodiment of the present disclosure and does not limit the embodiment of the present disclosure. A Z-axis direction denotes a length direction of the chain, an X-axis direction denotes a width direction, and a Y-axis direction denotes a thickness direction.

[0023] The extension direction (Z-axis direction) of the chain is the direction in which the chain moves when in use. When the chain moves along a straight path, the extension direction of the chain corresponds to the extension direction of the straight path. When the chain moves along a curved path, the extension direction of the chain corresponds to the tangential direction of the curved path. In some drawings, the direction of movement of the chain is indicated by a white arrow FD to facilitate understanding of the embodiment described in this disclosure.

[0024] As in Fig. As shown in Figures 1 to 3, a chain 10 according to the first embodiment has a plurality of first links 20 and a plurality of second links 30.

[0025] Fig. 4A is a perspective view of the multitude of first links in a state in which they are connected to each other. Fig. 4B is a front view of the multitude of first links in a state in which they are connected to each other (a first spiral link connection). Fig. 4C is a perspective exploded view of the multitude of first links.

[0026] As in Fig. As shown in Figures 4A to 4C, in the first embodiment a plurality of first links 20 have the same shape. In the case of the first embodiment, each first link 20 is bent when viewed in the extension direction of the chain 10, while extending in the extension direction (Z-axis direction) of the chain 10. In other words, the first link 20 has an L-shape when viewed in the extension direction of the chain 10.

[0027] As in Fig. As shown in Figures 3 and 4A to 4C, the plurality of first links 20 are connected in series. In other words, each first link 20 has one side section and the other section in the direction of extension of the chain (Z-axis direction). One side section of the first link 20 is connected to the other side section of an adjacent first link 20. The other side section of the first link 20 is connected to one side section of another adjacent first link 20. A specific connection method is described in detail below.

[0028] Each of the first links 20 pivots around the first and second pivot centerlines C1 and C2. Specifically, each first link 20 is connected on one side to an adjacent first link 20 and is pivotable with respect to the adjacent first link 20 around the first pivot centerline C1, while each first link 20 is connected on its other side to another adjacent first link 20 and is pivotable with respect to the other adjacent first link 20 around the second pivot centerline C2.

[0029] The first pivot centerline C1 and the second pivot centerline C2 extend in different directions. Specifically, the first pivot centerline C1 intersects the second pivot centerline C2 when viewed along the extension direction (Z-axis direction) of the chain 10. In the first embodiment, the extension direction of the first pivot centerline C1 (X-axis direction) and the extension direction of the second pivot centerline C2 (Y-axis direction) intersect at an angle of approximately 90 degrees when viewed along the extension direction of the chain 10.

[0030] If each of the plurality of first links 20 is pivotably connected in series with the adjacent first links 20 about the first and second pivot centerlines C1 and C2, a first spiral link connection 40 extending in a helical shape is formed, as shown in Fig. Figure 3 shows the first spiral link connection 40, which is a flexible link connection with a plurality of first pivot centerlines C1 and a plurality of second pivot centerlines C2, arranged alternately in the extension direction (Z-axis direction) of the chain 10.

[0031] The term “helix”, as used herein, refers to a three-dimensional curve extending in the direction of a reference line while orbiting the reference line. In the present disclosure, the reference line of the helix corresponds to a line extending in the direction of extension (Z-axis direction) of the chain 10 and passing through the cross-sectional shape of the chain 10 perpendicular to the direction of extension (i.e., a line lying in the contour of the cross-sectional shape, viewed in the direction of extension).

[0032] As described above, in the case of the first embodiment, the plurality of first links 20 have the same shape and the first and second pivot centerlines C1 and C2 are essentially perpendicular when viewed in the extension direction (Z-axis direction) of the chain 10. Therefore, as in Fig. As shown in Figure 4A, four successive first links 20 form one cycle (one pitch) of the first helical link connection 40. Furthermore, the four successive first links 20, i.e., the first helical link connection 40, have an essentially quadrilateral contour when viewed in the extension direction (Z-axis direction) of the chain 10, as shown in Fig. 4B is shown.

[0033] Fig. 5A is a perspective view of a multitude of second members in a state where they are connected to each other. Fig. 5B is a front view of the multitude of second links in a state in which they are connected to each other (second spiral link connection). Fig. 5C is a perspective exploded view of the multitude of second links.

[0034] As in Fig. As shown in Figures 5A to 5C, in the first embodiment, the plurality of second links 30 have the same shape. Furthermore, in the first embodiment, the first links 20 and the second links 30 have the same shape. In other words, the chain 10 according to the first embodiment is formed from one type of link. Therefore, each second link 30 is also bent when viewed along the extension direction of the chain 10, while extending along the extension direction (Z-axis direction) of the chain 10. In other words, the second link 30 also has an L-shape when viewed along the extension direction of the chain 10.

[0035] As in Fig. As shown in Figures 3 and 5A to 5C, the plurality of second links 30 are connected in series. In other words, each second link 30 has one side section and the other side section in the extension direction of the chain 10 (Z-axis direction). One side section of the second link 30 is connected to the other side section of an adjacent second link 30. The other side section of the second link 30 is connected to one side section of another adjacent second link 30. A specific connection method is described in detail below.

[0036] Furthermore, each second link 30 is connected on one side to an adjacent second link 30 and is pivotable with respect to the adjacent second link 30 about the third pivot centerline C3, while each second link 30 is connected on the other side to another adjacent second link 30 and is pivotable with respect to the other adjacent second link 30 about the fourth pivot centerline C4.

[0037] The third pivot centerline C3 and the fourth pivot centerline C4 extend in different directions. Specifically, the third pivot centerline C3 intersects the fourth pivot centerline C4 when viewed along the extension direction (Z-axis direction) of the chain 10. In the first embodiment, the extension direction of the third pivot centerline C3 (X-axis direction) and the extension direction of the fourth pivot centerline C4 (Y-axis direction) intersect at an angle of approximately 90 degrees when viewed along the extension direction of the chain 10.

[0038] If each of the plurality of second links 30 in series is pivotably connected to the adjacent second links 30 about the third and fourth pivot centerlines C3 and C4, a second helical link connection 50 extending in a helical shape is formed, as in Fig. Figure 3 shows the second spiral link connection 50, which is a flexible link connection with a plurality of third pivot centerlines C3 and a plurality of fourth pivot centerlines C4, arranged alternately in the extension direction (Z-axis direction) of the chain 10.

[0039] As described above, in the case of the first embodiment, the plurality of second links 30 have the same shape, and the third and fourth pivot centerlines C3 and C4 are essentially perpendicular from the perspective in the extension direction (Z-axis direction) of the chain 10. Therefore, as in Fig. As shown in Figure 5A, four successive second links 30 form a cycle of the second helical link connection 50. Furthermore, the four successive second links 30, i.e., the second helical link connection 50, have an essentially quadrilateral contour when viewed in the extension direction (Z-axis direction) of the chain 10, as shown in Figure 5A. Fig. 5B is shown.

[0040] The first helical link connection 40, formed from the plurality of first links 20, and the second helical link connection 50, formed from the plurality of second links 30, are connected by connecting elements to form a chain 10. Specifically, the first helical link connection 40 and the second helical link connection 50 are connected to form a double helix structure.

[0041] Fig. Figure 6 is a perspective view showing the first and second spiral link connections that form a double helix structure.

[0042] As in Fig. As shown in Figure 6, the first spiral link connection 40 and the second spiral link connection 50 form a double helix structure without direct contact with each other.

[0043] Specifically, each of the first pivot center lines C1 of the first links 20, which form the first helical link connection 40, and a corresponding third pivot center line C3 of the second links 30, which form the second helical link connection 50, lie on the same straight line. Furthermore, each of the second pivot center lines C2 of the first links 20 and a corresponding fourth pivot center line C4 of the second links 30 lie on the same straight line. As a consequence, the first helical link connection 40 and the second helical link connection 50 form a double helix structure without direct contact with each other. Strictly speaking, it is sufficient that the first helical link connection 40 and the second helical link connection 50 are not in direct contact with each other, at least when the chain 10 extends in a straight line.This is because otherwise the chain cannot be bent.

[0044] Such a connection of the first spiral link connection 40 and the second spiral link connection 50 is carried out via connecting components.

[0045] Fig. Figure 7 is a perspective view showing the first and second links in a state where they are connected via connecting components. Fig. Figure 8 is a perspective exploded view to describe the joining of a multitude of first and second links via a multitude of connecting components. Fig. 9A is a cross-sectional view of the chain along a line S1-S1, which is in Fig. 1 is shown. Fig. 9B is a cross-sectional view of the chain along a line S2-S2, which is in Fig. 1 is shown.

[0046] As in Fig. As shown in Figures 7 to 9B, in the case of the first embodiment, the chain 10 has first and second pins 60, 62 as connecting elements. The first links 20 are connected via the first helical link connection 40 and the second links 30 are connected via the first and second pins 60, 62 in the first helical link connection 40.

[0047] A first pin 60 pivotally supports the second links 30, while it pivotally supports the first links 20. Specifically, the first pin 60 pivotally supports the first links 20 around the first pivot centerline C1 at one end of the base and the tip. Furthermore, the first pin 60 pivotally supports the second links 30 around the third pivot centerline C3 at the other end of the base and the tip. With such support from the first pin 60, the first pivot centerline C1 of the first links 20 and the third pivot centerline C3 of the second links 30 lie on the same straight line.

[0048] The first pin 60 pivotally supports each of the two successive first links 20 about the first pivoting centerline C1. This connects the two successive first links 20 pivotally to each other about the first pivoting centerline C1. Simultaneously, the first pin 60 pivotally supports each of the two successive second links 30 about the third pivoting centerline C3. This connects the two successive second links 30 pivotally to each other about the third pivoting centerline C3. In other words, the first pin 60 pivotally supports the two first links 20 and the two second links 30.

[0049] A second pin 62 also pivotally supports the second links 30, while it pivotally supports the first links 20. Specifically, the second pin 62 pivotally supports the first links 20 around the second pivot centerline C2 at one end of the base and the tip. Additionally, the second pin 62 pivotally supports the second links 30 around the fourth pivot centerline C4 at the other end of the second base and the tip. With such support from the second pin 62, the second pivot centerline C2 of the first links 20 and the fourth pivot centerline C4 of the second links 30 lie on the same straight line.

[0050] The second pin 62 pivotally supports each of the two consecutive first links 20 about the second pivoting centerline C2. This connects the two consecutive first links 20 pivotally to each other about the second pivoting centerline C2. Simultaneously, the second pin 62 pivotally supports each of the two consecutive second links 30 about the fourth pivoting centerline C4. This connects the two consecutive second links 30 pivotally to each other about the fourth pivoting centerline C4. In other words, the second pin 62 pivotally supports the two first links 20 and the two second links 30.

[0051] In the case of the first embodiment, the first and second pins 60, 62 have the same shape.

[0052] In the first embodiment, the first and second members 20, 30 are pivotably supported by the first and second pins 60, 62. Therefore, as in Fig. As shown in Figure 8, each first link 20 has two through holes 20a, and each second link 30 has two through holes 30a. The two through holes 20a have a first pin 60 and a second pin 62 inserted through them, and the two through holes 30a have a first pin 60 and a second pin 62 inserted through them. In each first link 20, one through hole 20a extends in the direction of extension of the first pivot centerline C1, and the other through hole 20a extends in the direction of extension of the second pivot centerline C2. In each second link 30, one through hole 30a extends in the direction of extension of the third pivot centerline C3, and the other through hole 30a extends in the direction of extension of the fourth pivot centerline C4. The first pins 60 and the second pins 62 are inserted into the through holes 20a.This causes each first pin 60 to pivotally support the first link 20 about the first pivot centerline C1, and causes each second pin 62 to pivotally support the first link 20 about the second pivot centerline C2. Similarly, the first pins 60 and the second pins 62 are inserted into the through holes 30a. This causes each first pin 60 to pivotally support the second link 30 about the third pivot centerline C3, and causes each second pin 62 to pivotally support the second link 30 about the fourth pivot centerline C4.

[0053] It should be noted that a retaining ring 64 is attached to the tip end of each of the first and second pins 60, 62. This prevents the first and second pins 60, 62 from falling off the first and second links 20, 30. In the case of the first embodiment, as shown in Fig. 9A and Fig. As shown in Figure 9B, a roller 66 is attached to each of the first and second pins 60, 62 via a bushing 68. Both the roller 66 and the bushing 68 may be provided, or both may be omitted, as necessary. Alternatively, only the roller 66 may be provided, as necessary. Furthermore, the method of retaining the first and second pins 60, 62 in the first and second links 20, 30 is not limited to the use of retaining rings 64; for example, cotter pins or the like may be used instead. Additionally, the first and second pins 60, 62 and the first and second links 20, 30 may be combined by, for example, die forming, so that no other parts are used.

[0054] In the first embodiment, each of the plurality of first and second pins 60, 62 pivotably supports two first links 20 and two second links 30. Alternatively, the first and second pins 60, 62 can be integrally formed with the first links 20 and the second links 30.

[0055] As in Fig. 9A and Fig. As shown in Figure 9B, each first member 20 has an inner section located on the inside with respect to an adjacent first member 20 connected to one side, and an outer section located on the outside with respect to another adjacent first member 20 connected to the other side. Similarly, each second member 30 has an inner section located on the inside with respect to an adjacent second member 30 connected to one side, and an outer section located on the outside with respect to another adjacent second member 30 connected to the other side.For example, there may be a configuration such that: a bushing 68 is integrally provided on each of the inner sections of the first links 20 and the inner sections of the second links 30; and each of the first and second pins 60, 62 passes through a corresponding bushing 68 and is integrally provided on a corresponding outer section of the first links 20 and the outer section of the second links 30. In other words, in a state where each bushing 68 is non-pivotally supported by a corresponding inner section of the first and second links 20, 30, the bushing 68 pivotally supports a corresponding first and second pin 60, 62, which is non-pivotally supported by a corresponding outer section of the first and second links 20, 30.

[0056] The method for integrally providing each of the first and second pins 60, 62 to a corresponding first and second link 20, 30 is, for example, an "interference fit". In short, an "interference fit" involves through holes in each of the first and second links 20, 30. The first and second pins 60, 62 are each press-fitted into a corresponding through hole. As a consequence, the first and second pins 60, 62 are each supported by the through hole in a non-pivotable manner.

[0057] Fig. Figures 10A to 10D are perspective views showing part of the chain bending in different directions.

[0058] As in the Fig. 10A and Fig. As shown in Figure 10B, when a first link 20 (20A) pivots about the second pivot centerline C2 (C2A) to one side or the other in the latitude direction (X-axis direction), the corresponding second link 30 (30A) pivots about the fourth pivot centerline C4 (C4A), which is on the same straight line as the second pivot centerline C2 (C2A), in the same direction.

[0059] It should be noted that in the present description, if there is a first member and a second member, and the relative position of one with respect to the other is kept essentially constant, i.e., if one cannot move relative to the other, the case is defined such that there is a "correspondence relationship" between this first member and this second member. In the case of the first embodiment, as in Fig. Figure 7 shows the first link 20 and the second link 30, which are supported by the common first and second pin 60, 62, in a correspondence relationship.

[0060] As in Fig. 10C and Fig. As shown in Figure 10D, when a first member 20 (20B) pivots about the first pivot centerline C1 (C1B) to one side or the other in the thickness direction (Y-axis direction), the corresponding second member 30 (30B) pivots about the third pivot centerline C3 (C3B), which is on the same straight line as the first pivot centerline C1 (C1B).

[0061] As described above, the first link 20 and the corresponding second link 30 pivot in synchronization with each other, allowing the chain 10 to be bent in the width direction (X-axis direction) and the thickness direction (Y-axis direction), from the perspective of the extension direction (Z-axis direction). In other words, in the case of the first embodiment, the chain 10 can be bent in four directions, from the perspective of the extension direction. As a consequence, the chain 10 can freely change its direction of movement. Consequently, the chain 10 can move along complex paths that curve in complex ways, as well as along straight paths.

[0062] Fig. Figure 11 is a perspective view showing the chain according to the first embodiment in a state where it engages with a plurality of sprockets. Fig. The teeth of sprockets B1 and B2 are omitted.

[0063] As in Fig. As shown in Figure 11, the chain 11 can move along a path with various curves or curvatures. As a consequence, the chain 10 can, for example, engage with the multitude of sprockets W1, W2, which have different directions of extension of the centers of rotation Wa, Wb. As shown in Fig. As shown in Figure 2, the teeth of the sprockets W1 and W2 can engage with the chain 10 by entering the gap G, which is formed between the first link 20 and the second link 30. In other words, the teeth of the sprockets W1 and W2 come into contact with the first links 20 and the second links 30 in the direction of extension (Z-axis direction) of the chain 10, so that the chain 10 can be driven in the direction of extension.

[0064] According to the chain 10 of the first embodiment, the sprockets W1, W2 can engage with the chain 10 in the width direction (X-axis direction) of the chain 10 and also in the thickness direction (Y-axis direction) of the chain 10. This is because the first link 20 and the second link 30, which engage with the teeth of the sprockets W1, W2, form the first and second helical link connections 40, 50. As a consequence, the sprockets W1, W2 can engage with the chain 10 from four directions, from the perspective of the chain 10's extension direction (Z-axis direction).

[0065] As with the chain 10 according to the first embodiment, a belt, wire, or the like is used as a power transmission component that can freely change its direction of movement to move along a complex path. However, since the belt and wire can be easily twisted compared to the chain, the power transmission efficiency is lower than that of the chain. Furthermore, if the pulleys are freely positioned, such as the sprockets W1, W2 shown in Fig. As shown in Figure 11, it is likely that the belt or wire engages with the pulleys with insufficient tension and slips on the pulleys. Therefore, the chain 10, according to the first embodiment, can move along a complex path, like a belt or wire, and has a higher power transmission efficiency than a belt or wire.

[0066] Furthermore, since the chain 10 is less likely to twist compared to a belt or wire, various options can be attached to the chain 10. For example, the first link 20 (and / or the second link 30) of the chain 10 can be a single piece or removable with a mounting point for attaching other components to the chain 10. For example, the chain 10 can be fitted with a plastic cover.

[0067] Furthermore, in the chain 10 of the first embodiment, the first helical link connection 40, which has the plurality of first links 20, and the second helical link connection 50, which has the plurality of second links 30, form a double helix structure, as shown in Fig. Figure 6 illustrates this. In other words, the first and second helical link connections 40 and 50 are like threads of a so-called double-threaded screw. Therefore, the first and second helical link connections 40 and 50 can drive different rotating bodies and can also be driven by different rotating bodies.

[0068] Fig. Figure 12 is a perspective view showing a chain according to the first embodiment and a rotating body of an example. Fig. Figure 13 is a perspective view showing a chain according to the first embodiment and another example of rotating bodies.

[0069] As in Fig. As shown in Figure 12, the chain 10 can engage with rotating bodies R1, R2, each having centerlines of rotation Ra, Rb, extending in the direction of extension (Z-axis direction) of the chain. The rotating bodies R1, R2 comprise rollers, teeth, and the like, which enter the gap G between the first link 20 and the second link 30 of the chain 10. The rotating bodies R1, R2 face each other in the lateral direction (X-axis direction) of the chain 10, with the chain 10 positioned between them. Consequently, when the chain 10 moves in its direction of extension (Z-axis direction), the rotating bodies R1, R2 are driven to rotate. Conversely, when the rotating bodies R1, R2 rotate in directions opposite to each other, the chain 10 is driven by itself in its direction of extension.

[0070] Furthermore, as in Fig. As shown in Figure 13, the chain 10 engages with rotating bodies R3, R4, each of which has centerlines of rotation Rc, Rd extending in a direction perpendicular to the direction of extension (Z-axis direction) of the chain 10. The respective centerlines of rotation Rc, Rd of the rotating bodies R3, R4, which are in Fig. The rotating bodies R3 and R4, as shown in Figure 13, extend in the thickness direction (Y-axis direction) of the chain 10. Furthermore, the rotating bodies R3 and R4 have teeth or the like that engage in the gap G between the first links 20 and the second links 30 of the chain 10. The rotating bodies R3 and R4 face each other in the width direction (X-axis direction) of the chain 10, with the chain 10 positioned between them. Consequently, when the chain 10 moves in its extension direction (Z-axis direction), the rotating bodies R3 and R4 are driven to rotate. Conversely, when the rotating bodies R3 and R4 rotate in directions opposite to each other, the chain 10 is driven by itself in its extension direction.

[0071] The chain 10 is not limited to having ends and can be endless.

[0072] Fig. Figure 14 is a perspective view of the endless chain according to the first embodiment.

[0073] As in Fig. As shown in Figure 14, the chain 10 can be endless depending on its application. The chain 10 can be used in various applications by taking on a form that has ends or an endless form, thus providing high versatility.

[0074] According to the first embodiment described above, the chain 10, which can be bent in a multitude of directions from the perspective in the extension direction, can have a highly versatile structure that can be used as is. (Second example)

[0075] A second embodiment is essentially the same as the first embodiment described above, except that the shapes of the first and second elements are different. The second embodiment is almost identical to the first embodiment, except for the above. Therefore, the second embodiment will be described focusing on the points of difference.

[0076] Fig. Figure 15 is a perspective view of part of a chain according to the second embodiment. Fig. Figure 16 is a top view of a part of the chain according to the second embodiment. Fig. Figure 17 is a perspective exploded view of part of the chain according to the second embodiment. Fig. 18A is a front view of a multitude of first links connected to each other (first helical link connection), and Fig. 18B is a front view of a multitude of second links connected to each other (second spiral link connection). Fig. 19A and Fig. Figure 19B is a cross-sectional view of the chain along a line S3-S3 or a cross-sectional view of the chain along a line S4-S4, which is shown in Fig. 15 are shown.

[0077] As in Fig. As shown in Figures 15 to 19B, in the chain 110 according to the second embodiment, a plurality of first links 120, forming a first helical link connection 140, have the same shape. Furthermore, a plurality of second links 130, forming a second helical link connection 150, also have the same shape. In addition, in the case of the second embodiment, the first links 120 and the second links 130 have the same shape. In other words, the chain 110 according to the second embodiment is formed from one type of link.

[0078] As in Fig. 18A and Fig. As shown in Figure 18B, the first links 120 and the second links 130 each have an arc shape when viewed in the direction of extension (Z-axis direction) of the chain 10. As a consequence, the first and second spiral link connection 140, 150 each have an essentially circular shape when viewed in the direction of extension of the chain 110.

[0079] As in Fig. 19A and Fig. As shown in Figure 19B, the first links 120 and the second links 130 are connected to and supported by the first and second pins 160, 162, such that each first pivot center line C1 and the corresponding third pivot center line C3 are on the same straight line and each second pivot center line C2 and the corresponding fourth pivot center line C4 are on the same straight line.

[0080] In the same way as in the first embodiment described above, in the second embodiment the chain 110, which can be bent in a multitude of directions from the perspective in the extension direction, can also have a highly versatile structure that can be used as is.

[0081] In the case of the second embodiment, as in Fig. 19A and Fig. As shown in Figure 19B, the chain 110 has a circular shape when viewed in the direction of extension (Z-axis direction) and is therefore suitable for movement in a circular tube. (Third embodiment)

[0082] In the case of the first embodiment described above, as in Fig. Figure 3 shows that the plurality of first links 20 forming the first helical link connection 40 are of one type. Furthermore, the plurality of second links 30 forming the second helical link connection 50 are also of one type. In contrast, in a third embodiment, a plurality of first links forming a first helical link connection comprises a plurality of link types having different shapes, and a plurality of second links forming a second helical link connection comprises a plurality of link types having different shapes. The third embodiment is almost identical to the first embodiment except for the foregoing. Therefore, the third embodiment will be described with a focus on this difference.

[0083] Fig. Figure 20 is a perspective view of part of a chain according to the third embodiment. Fig. Figure 21 is a perspective exploded view of a part of the chain according to the third embodiment. Fig. 22A is a front view of a multitude of first links connected together (first helical link connection), and Fig. 22B is a front view of a multitude of second links connected to each other (second spiral link connection). Fig. 23A and Fig. 23B is a cross-sectional view of the chain along a line S5-S5, which is in Fig. 20 is shown, or a cross-sectional view of the chain along a line S6-S6, which is in Fig. 20 is shown.

[0084] As in Fig. As shown in Figures 20 to 23B, in the chain 210 according to the third embodiment, the first helical link connection 240 is formed from a plurality of types of first links 220, 222, which have different shapes. The second helical link connection 250 is formed from a plurality of types of second links 230, 232, which have different shapes.

[0085] Specifically, as in Fig. 21 and Fig. As shown in Figure 22A, each first link 222 is smaller than the first link 220. The relatively small first links 222 are entirely located inside the first links 220. Furthermore, the first links 220 and 222 are alternately connected to form a first helical link connection 240.

[0086] In the same way, as in Fig. 21 and Fig. As shown in Figure 22B, every second link 232 is smaller than the second link 230. The relatively small second links 232 are entirely located inside the second links 230. Furthermore, the second links 230 and 232 are alternately connected to form a second spiral link connection 250.

[0087] In the case of the third embodiment, the first links 220 and the second links 230 have the same shape, and the first links 222 and the second links 232 have the same shape. In other words, the chain 210 of the third embodiment has two types of links.

[0088] As in Fig. 23A and Fig. As shown in Figure 23B, the first links 220, 222 and the second links 230, 232 are connected to and supported by the first and second pins 260, 262, such that each first pivot centerline C1 and the corresponding third pivot centerline C3 are on the same straight line and each second pivot centerline C2 and the corresponding fourth pivot centerline C4 are on the same straight line.

[0089] In the same way as in the first embodiment described above, in the third embodiment the chain 210, which can be bent in a multitude of directions from the perspective in the extension direction, can also have a highly versatile structure that can be used as is. (Fourth example)

[0090] In the case of the third embodiment described above, as in Fig. 23A and Fig. As shown in Figure 23B, the dimensions in the width direction (X-axis direction) and the dimensions in the thickness direction (Y-axis direction) of the cross-section of the chain 210 are essentially the same. To achieve this, the shapes of the first links 220, 222 and the second links 230, 232 are determined. Therefore, the chain 210 can be used according to the third embodiment described above without distinguishing between the width and thickness directions. In contrast, the cross-section of a chain according to a fourth embodiment has a dimension in the width direction that differs from a dimension in the thickness direction. The fourth embodiment is almost identical to the third embodiment, except for the above. Therefore, the fourth embodiment is described with a focus on this difference.

[0091] Fig. Figure 24 is a perspective view of a part of the chain according to a fourth embodiment. Fig. Figure 25 is a perspective exploded view of a part of the chain according to the fourth embodiment. Fig. 26A is a front view of a multitude of first links connected together (first helical link connection), and Fig. 26B is a front view of a multitude of second links connected to each other (second spiral link connection). Fig. 27A is a cross-sectional view of the chain along a line S7-S7, which is in Fig. 24 is shown, and Fig. 27B is a cross-sectional view of the chain along a line S8-S8, which is in Fig. 24 is shown.

[0092] As in Fig. As shown in Figures 24 to 27B, in the chain 310 according to the fourth embodiment, the first helical link connection 340 is formed from a plurality of types of first links 320, 322, which have different shapes. The second helical link connection 350 is formed from a plurality of types of second links 330, 332, which have different shapes.

[0093] Specifically, as in Fig. 27A and Fig. As shown in Figure 27B, the shapes of the first links 320, 322 and the second links 330, 332 are determined such that the size in the width direction (X-axis direction) is larger than the size in the thickness direction (Y-axis direction) in the cross-sectional shape of the chain 310. In particular, each of the first links 320 and 322 and the second links 330 and 332 has an L-shape with a size in the width direction that is larger than a size in the thickness direction.

[0094] In the fourth embodiment, the first links 320 and the second links 330 have the same shape, and the first links 322 and the second links 332 have the same shape. In other words, the chain 310 of the fourth embodiment has two types of links.

[0095] Such first links 320, 322 are alternately connected, as in Fig. 26A is shown, forming a first spiral link connection 340, which has a rectangular shape when viewed in the extension direction (Z-axis direction) of the chain 310. Such second links 330, 332 are connected alternately, as shown in Fig. 26B is shown, which forms a second spiral link connection 350, which has a rectangular shape from the perspective of the extension direction (Z-axis direction) of the chain 310.

[0096] As in Fig. 27A and Fig. As shown in Figure 27B, the first links 320, 322 and the second links 330, 332 are connected to and supported by the first and second pins 360, 362, such that each first pivot center line C1 and the corresponding third pivot center line C3 are on the same straight line and each second pivot center line C2 and the corresponding fourth pivot center line C4 are on the same straight line.

[0097] In the same way as in the first embodiment described above, in the fourth embodiment the chain 310, which can be bent in a multitude of directions from the point of view of the extension direction, can also have a highly versatile structure that can be used as is. (Fifth example)

[0098] In the case of the first embodiment described above, as in Fig. As shown in Figure 4B, each of the plurality of first members 20 has a first pivot centerline C1 and a second pivot centerline that are perpendicular to each other. As in Fig. As shown in Figure 5B, each of the plurality of second links 30 has a third pivot centerline C3 and a fourth pivot centerline C4, which are perpendicular to each other. In contrast, in a chain according to the sixth embodiment, the first and second pivot centerlines in each of the first links intersect at an angle other than 90°, and the third and fourth pivot centerlines in each of the second links also intersect at an angle other than 90°. The fifth embodiment is almost the same as the first embodiment, except for the above. Therefore, the fifth embodiment will be described with a focus on this point of difference.

[0099] Fig. Figure 28 is a perspective view of part of a chain according to the fifth embodiment. Fig. Figure 29 is a perspective exploded view of part of the chain according to the fifth embodiment. Fig. 30A is a front view of a multitude of first links connected together (first helical link connection), and Fig. 30B is a front view of a multitude of second links connected to each other (second spiral link connection). Fig. Figure 31 is a perspective exploded view to describe the connection of the multitude of first and second links via the multitude of connecting components.

[0100] As in Fig. As shown in Figures 28 to 31, the chain 410 according to the fifth embodiment has a first helical link connection 440, which is formed by connecting a plurality of first links 420 of the same shape. The second helical link connection 450 is formed by connecting a plurality of second links 430 of the same shape. In the case of the fifth embodiment, the first and second links 420, 430 have the same shape. In other words, the chain 410 according to the fifth embodiment is formed from one type of link.

[0101] As in Fig. 29 and Fig. As shown in Figure 30A, each of the first elements 420 pivots about the first and second pivoting centerlines C1 and C2. Specifically, each first element 420 is connected on one side to an adjacent first element 420 and pivots about the first pivoting centerline C1 with respect to the adjacent first element 420, while each first element 420 is connected on its other side to another adjacent first element 420 and pivots about the second pivoting centerline C2 with respect to the other adjacent first element 420. In the case of the fifth embodiment, as shown in Fig. Figure 30A shows the first pivot centerline C1 and the second pivot centerline C2 at an angle of approximately 60° from the perspective in the extension direction (Z-axis direction) of the chain 410.

[0102] In such first links 420, six successive first links 420 correspond to one cycle of the first spiral link connection 440.

[0103] As in Fig. 29 and Fig. As shown in Figure 30B, each of the second links 430 rotates about the third and fourth pivoting centerlines C3 and C4. Specifically, each second link 430 is connected on one side to an adjacent second link 430 and pivots about the third pivoting centerline C3 with respect to the adjacent second link 430, while each second link 430 is connected on its other side to another adjacent second link 430 and pivots about the fourth pivoting centerline C4 with respect to the other adjacent second link 430. In the case of the fifth embodiment, as shown in Figure 30B, the third and fourth pivoting centerlines C3 and C4 intersect. Fig. Figure 30B shows the third pivot centerline C3 and the fourth pivot centerline C4 at an angle of approximately 60° from the perspective in the extension direction (Z-axis direction) of the chain 410.

[0104] In such second links 430, six successive second links 430 correspond to one cycle of the second spiral link connection 450.

[0105] As in Fig. As shown in Figure 31, the first links 420 and the second links 430 are connected to and supported by the first and second pins 460, 462, such that each first pivot center line C1 and the corresponding third pivot center line C3 are on the same straight line, and each second pivot center line C2 and the corresponding fourth pivot center line C4 are on the same straight line.

[0106] In the same way as in the first embodiment described above, in the fifth embodiment the chain 410, which can be bent in a multitude of directions from the perspective in the extension direction, can also have a highly versatile structure that can be used as is.

[0107] In the fifth embodiment, the chain 410 can be bent in six directions from the perspective of the chain's extension direction (Z-axis direction). The sprocket can engage with the chain 410 from these six directions.

[0108] It should be added that the angle at which the first pivot centerline intersects the second pivot centerline, and the angle at which the third pivot centerline intersects the fourth pivot centerline, are not limited to 90° or 60°, and can be any angle as viewed along the chain's extension direction. However, these angles are preferably such that a value obtained by multiplying these angles by an integer is 360°. In other words, a cycle of the first helical link connection is preferably formed by an integer number of first links, and a cycle of the second helical link connection is preferably formed by an integer number of second links. As a consequence, the chain's productivity and handling are improved. For example, the chain can be made very easily endless, as in Fig. 14 is shown. (Sixth embodiment example)

[0109] In the case of the first embodiment described above, the first helical link connection 40 and the second helical link connection 50 are connected by a plurality of first and second pins 60, 62. Therefore, as in Fig. Figure 7 shows a first link 20 and a second link 30, which correspond to each other, connected by a first pin 60 and a second pin 62. In contrast, in the sixth embodiment, the first spiral link structure and the second spiral link structure are connected by connecting components that differ from the pin. Therefore, a sixth embodiment focusing on the different connecting components is described.

[0110] Fig. Figure 32 is a perspective view of part of a chain according to the sixth embodiment. Fig. Figure 33 is a perspective view of the first and second connecting components in the chain according to the sixth embodiment. Fig. Figure 34 is a perspective view showing the first and second links in a state where they are connected via the connecting components. Fig. 35 is a cross-sectional view of the chain along a line S9-S9, which is in Fig. 32 is shown.

[0111] As in Fig. Figures 32 to 35 show that in the chain 510 according to the sixth embodiment, the first spiral link connection 540 and the second spiral link connection 550 are connected to each other via a first and second connecting piece 560 and 562.

[0112] As in Fig. As shown in Figure 32, the first connecting piece 560 is placed inside the double helix structure formed by the first helical link connection 540 and the second helical link connection 550. As shown in Fig. As shown in Figure 33, the first connecting piece 560 has a main body 560a with a U-shape when viewed in the direction of extension (Z-axis direction) of the chain 510, and pin-shaped first and second link supports 560b, 560c, which extend outwards from the main body 560a in opposite directions to each other. The first link support 560b connects and supports two successive first links 520 pivotably with respect to each other about the first pivot centerline C1. In addition, the second link support 560c connects and supports two successive second links 530 pivotably with respect to each other about the third pivot centerline C3.

[0113] As in Fig. As shown in Figure 32, the second connecting piece 562 is positioned within the double helix structure formed by the first helical link connection 540 and the second helical link connection 550. The second connecting piece 562 has a main body 562a with a U-shape when viewed in the extension direction (Z-axis direction) of the chain 510 and pin-shaped third and fourth link supports 562b and 562c, respectively, extending outwards from the main body 562a in opposite directions to each other. The third link support 562b connects and pivotally supports two successive first links 520 relative to each other about the second pivoting centerline C2. Furthermore, the fourth link support 562c pivotally connects and supports two successive second links 530 relative to each other about the fourth pivoting centerline C4.

[0114] In the case of the sixth embodiment, the first connecting piece 560 and the second connecting piece 562 have the same shape.

[0115] Such a first and second connecting piece 560 and 562 form an interior space Is that passes through the center of the cross-section of the chain 510 and extends in the direction of extension (Z-axis direction) of the chain 510, as shown in Fig. Figure 35 shows the interior space Is, which can be used to accommodate an air duct, a power cable, and the like.

[0116] It should be noted that the first and second connecting pieces, which can form the interior space extending in the direction of the chain in this way, can be realized in various forms.

[0117] Fig. Figure 36 is a perspective view showing another example of a connector. Fig. Figure 37 is a perspective view, which shows yet another example of a connecting piece.

[0118] As in Fig. As shown in Figure 36, another example of a connecting piece 660 has a main body section 660a and pin-shaped first and second link supports 660b, 660c, which extend outwards from the main body section 660a in opposite directions to each other. The main body section 660a has a through-hole 660d that passes through it in the direction of extension (Z-axis direction) of the chain.

[0119] As in Fig. Figure 37 shows another example of a connecting piece 760, comprising a main body 760a with a U-shape when viewed in the direction of extension (Z-axis direction) of the chain and pin-shaped first and second link supports 760b, 760c, which extend outwards from the main body 760a in opposite directions to each other. The first and second link supports 760b, 760c are provided, and the side walls 760d, 760e of the main body 760a, which face each other at a distance, are connected via a connecting element 760f. The connecting element 760 also serves to protect a power cable or the like that runs through the main body 760a.

[0120] In other words, the first and second connecting links each need only have a main body with a space passing through it in the direction of extension (Z-axis direction) of the chain, a link support connecting and supporting two consecutive first links, and a link support connecting and supporting two consecutive second links. It should be noted that, alternatively, the first and second connecting links can be integrated with the first and second links, respectively.

[0121] Specifically, each of the first members has an inner section, which is positioned inside with respect to an adjacent first member connected to one side, and has an outer section, which is positioned outside with respect to another adjacent first member connected to the other side. Similarly, each of the second members has an inner section, which is positioned inside with respect to an adjacent second member connected to one side, and has an outer section, which is positioned outside with respect to another adjacent second member connected to the other side.For example, a through-hole corresponding to a bushing may be provided in each of the inner sections of the first links and the inner sections of the second links, and each of the link supports of the first and second connecting pieces may be integrally provided on a corresponding outer section of the first links and the outer section of the second links, while passing through a corresponding through-hole. In other words, while each link support is pivotally supported by the first and second connecting piece through a corresponding through-hole provided in the inner sections of the first and second links, each link support is not pivotally supported by a corresponding through-hole in the outer sections of the first and second links.

[0122] In the same way as in the first embodiment described above, in the sixth embodiment the chain 510, which can be bent in a multitude of directions from the perspective in the extension direction, can also have a highly versatile structure that can be used as is.

[0123] The chain of embodiments of the present disclosure is described above with reference to the first to sixth embodiments described above. However, the chain of embodiments according to the present disclosure is not limited to the first to sixth embodiments described above.

[0124] For example, in the case of the first embodiment described above, each first pin 60, as a first roller of itself, serves to pivotally connect two successive first links 20 with respect to each other about the first pivoting centerline C1 and to pivotally connect two successive second links 30 with respect to each other about the third pivoting centerline C3. Furthermore, each second pin 62, as a first roller of itself, serves to pivotally connect two successive first links 20 with respect to each other about the second pivoting centerline C2 and to pivotally connect two successive second links 30 with respect to each other about the fourth pivoting centerline C4.On the other hand, each of the first pin 60 and the second pin 62 serves, as a second role of itself, to connect the first spiral link connection 40 and the second spiral link connection 50, that is to connect the corresponding first link 20 and second link 30, as in . Fig. 7 is shown. However, the embodiment of the present disclosure is not limited to this.

[0125] For example, an embodiment may include such that each of the first links has a projection and a recess, and the projection and recess of each of the two successive first links pivotably engage, thereby forming the first helical link connection. Similarly, an embodiment may include such that each of the second links has a projection and a recess, and the projection and recess of each of the two successive second links pivotably engage, thereby forming the second helical link connection. In this case, the first and second helical link connections—that is, the connection of the corresponding first and second links—are made at sections that differ from the projections and recesses.For example, a section between the projection and the recess in the first member and a section between the projection and the recess in the corresponding second member can be connected by another component.

[0126] As described above, if each of the first and second links has a projection and a recess, the projection can be connected to the connecting element. In this case, specifically, each of the first and second links has a projection and a through-hole-shaped recess through which the projection passes. One end of the connecting element is connected to the distal end of the projection of the first link, which passes through the recess of another adjacent first link, and the other end of the connecting element is connected to the distal end of the projection of the second link, which passes through the recess of another adjacent second link.

[0127] Instead of the projection and the recess, a first link 20 can be pivotably connected to another first link 20 via a ball joint. Similarly, a second link 30 can also be pivotally connected to another second link 30 via a ball joint.

[0128] In the case of the first embodiment described above, as for example in Fig. As shown in Figure 6, each of the first pivot centerlines C1 and the second pivot centerlines C2 of the first links 20, and each of the third pivot centerlines C3 and the fourth pivot centerlines C4 of the second links 30, extend parallel to a plane (XY plane) that is perpendicular to the direction of extension (Z-axis direction) of the chain 10. However, the embodiment of the present disclosure is not limited to this. For example, the first and third pivot centerlines C1 and C3, which lie on the same straight line, may not be parallel to a plane perpendicular to the direction of extension of the chain.

[0129] Furthermore, in the case of the first embodiment described above, as in Fig. 4B and Fig. As shown in Figure 5B, the first and second links 20, 30 each have an L-shape when viewed in the direction of extension (Z-axis direction) of the chain 10. Furthermore, in the case of the second embodiment described above, as shown in Fig. 18A and Fig. As shown in Figure 18B, the first and second members 120 and 130 each have an arc shape. However, in the embodiment of the present disclosure, the shapes of the first and second members are not limited to this.

[0130] Furthermore, it is also possible, for example, to combine the first and second links 20, 30 in the chain 10 according to the first embodiment and the first and second links 120 and 130 in the chain 110 according to the second embodiment in order to re-form chains of different variations.

[0131] Fig. Figure 38 is a perspective view of part of a chain of an example variation. Fig. 39 is a perspective view of part of a chain as another example variation. Fig. 40 is a perspective view of part of a chain as yet another example variation.

[0132] A chain 810 of an example variation, which is in Fig. Figure 38 is shown, and is obtained by alternately connecting the chains 10 according to the first embodiment and the chains 110 according to the second embodiment. Therefore, the first helical link connection 840 is formed by alternately connecting the first helical link connection 40 according to the first embodiment and the first helical link connection 140 according to the second embodiment. Similarly, the second helical link connection 850 is formed by alternately connecting the second helical link connection 50 according to the first embodiment and the second helical link connection 150 according to the second embodiment.

[0133] A 910 chain as another example variation, which is in Fig. Figure 39 is designed such that, viewed in the extension direction (Z-axis direction) of the chain 910, the first and second links 20, 30 according to the first embodiment are located on one side in the width direction (X-axis direction) and on one side in the thickness direction (Y-axis direction), and the first and second links 120 and 130 according to the second embodiment are located on the other side in the width direction (X-axis direction) and on the other side in the thickness direction (Y-axis direction). Therefore, the first helical link structure 940 is formed by alternately connecting two first links 20 according to the first embodiment and two second links 130 according to the second embodiment.Furthermore, the second spiral link structure 950 is designed by alternately connecting two links 30 according to the first embodiment and two second links 130 according to the second embodiment. Therefore, the first link 20 and the second link 130 are in a correspondence relationship, and the first link 120 and the second link 30 are in a correspondence relationship.

[0134] In a chain 1010 as yet another example variation, which in Fig. As shown in Figure 40, the first spiral connection 1040 is formed from only the first links 20 according to the first embodiment, and the second spiral connection 1050 is formed from only the second links 130 according to the second embodiment. Therefore, each first link 20 and the corresponding second link 130 are in a correspondence relationship.

[0135] As described above, the first and second links 20, 30 according to the first embodiment and the first and second links 120 and 130 according to the second embodiment can be combined in various ways to create chains of different variations.

[0136] In the first embodiment described above, the outer surfaces of the first and second links 20, 30 of the chain 10 are not fitted with options such as rollers. Furthermore, the first and second pins 60, 62 do not protrude significantly from the outer surfaces of the first and second links 60, 62. Options such as rollers may be fitted to the outer surfaces of the first and second links 20, 30, and the first and second pins 60, 62 may protrude significantly from the outer surfaces of the first and second links 20, 30, provided that bending is not adversely affected when the chain 10 is bent and used as desired. The same applies to the chains of other embodiments.

[0137] Furthermore, in the case of the first embodiment described above, the chain 10 is used as a power transmission means, as in Fig.Figure 11 is shown. However, the embodiment of the present disclosure is not limited thereto. If the chain has an interior space extending in the direction of the chain's extension, as in chain 510 of the sixth embodiment described above, the chain can be used as a "cable veyor" (registered trademark) instead of being used as a power transmission means.

[0138] In other words, in a broad sense, the chain according to the embodiment of the present disclosure has the following: a plurality of first links pivotably connected to one another and forming a first helical link connection extending helically; a plurality of second links pivotally connected to one another and forming a second helical link connection extending helically; and a plurality of connecting elements connecting the first links and the second links, which correspond one-to-one to the first links, in order to connect the first helical link connection and the second helical link connection and to form a double helix structure.

[0139] It is possible to combine embodiments and modifications of the embodiments described above and various modifications optionally, as is appropriate, thereby achieving the effect that each has.

[0140] Although the present disclosure, in conjunction with preferred embodiments, is fully described with reference to the accompanying drawings, various modifications and changes are obvious to the person skilled in the art. It is understood that such modifications and changes are included within the scope of the present disclosure as set forth in the appended claims. Furthermore, combinations of elements and changes in the sequence can be implemented in each embodiment without departing from the scope and substance of the present disclosure. COMMERCIAL APPLICABILITY

[0141] The present disclosure is applicable to chains that are to be used for various applications. REFERENCE MARK LIST 10 chain 20 first item 30 second item 40 first spiral link connection 50 second spiral link connection 60 Connecting component (first pin) 62 Connecting component (second pin) QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] JP-A-7-4473

[0003]

Claims

[1] Chain with: a multitude of first links that are pivotably connected to each other and form a first spiral link connection that extends spirally; a multitude of second links that are pivotally connected to one another and form a second spiral link connection that extends spirally; and a multitude of connecting components that link the first links and the second links, which correspond one-to-one to the first links, to connect the first helical link connection and the second helical link connection and to form a double helix structure. [2] Chain according to claim 1, wherein Each first link has one side to which an adjacent first link is connected, and another side to which another adjacent first link is connected; the first link pivots about a first pivot centerline with respect to the adjacent first link, and the first link pivots about a second pivot centerline with respect to the other adjacent first link, extending in a direction different from the first pivot centerline, from the perspective of a direction of extension of the chain. Each second member has one side to which an adjacent second member is connected, and another side to which another adjacent second member is connected, the second member pivots about a third pivot centerline with respect to the adjacent second member, and the second member pivots about a fourth pivot centerline with respect to the other adjacent second member, extending in a direction different from the third pivot centerline, from the perspective in the direction of extension, and The connecting components connect the first spiral link connection and the second spiral link connection in such a way that: the first pivot centerline of each of the first links and the third pivot centerline of the corresponding of the second links are located on the same straight line; and the second pivot centerline of each of the first links and a fourth pivot centerline of the corresponding of the second links are located on the same straight line. [3] Chain according to claim 2, further comprising: as the connecting components, first pins, each of which pivotably connects and supports the two successive first links with reference to each other around the first pivoting center line, and pivotally connects and supports the two successive second links with reference to each other around the third pivoting center line; and second pins, each of which pivotably connects and supports the two successive first links with reference to each other around the second pivoting center line, and pivotally connects and supports the two successive second links with reference to each other around the fourth pivoting center line. [4] Chain according to claim 2, further comprising: as the connecting components, first connecting pieces, each of which has a first link support that pivotally connects and supports the two successive first links with respect to each other about the first pivoting centerline, a second link support that pivotally connects and supports the two successive second links with respect to each other about the third pivoting centerline, and a main body that has a space passing through it in one extension direction of the chain; and second connecting pieces, each of which has a third link support that pivotally connects and supports the two successive first links with reference to each other around the second pivoting centerline, a fourth link support that pivotally connects and supports the two successive second links with reference to each other around the fourth pivoting centerline, and a main body that has a space passing through it in one extension direction of the chain. [5] Chain according to claim 2, wherein each of the first pivot centerlines and a corresponding one of the second pivot centerlines are perpendicular to each other at an angle of 90°, as viewed in the extension direction. [6] Chain according to claim 2, wherein each of the first pivot centerlines and a corresponding one of the second pivot centerlines intersect at an angle of 60°, viewed in the extension direction. [7] Chain according to claim 1, wherein each of the first links and the second links has an L-shape when viewed in a direction of extension of the chain, such that the contours of the first spiral link connection and the second spiral link connection each have a rectangular shape when viewed in a direction of extension of the chain. [8] Chain according to claim 1, wherein each of the first links and the second links has an arc shape when viewed in a direction of extension of the chain, such that contours of the first spiral link connection and the second spiral link connection each have a circular shape when viewed in a direction of extension of the chain. [9] Chain according to claim 1, wherein each of the first links and the second links has the same shape. [10] Chain according to claim 1, wherein the first members are a variety of types of first members, which have different forms from each other, and The second members are a variety of types of second members, which have different forms from each other. [11] Chain according to claim 10, wherein the plurality of types of first links and the plurality of types of second links comprise links of the same shape.

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