Clamping and braking device for broken elastic wire

Abstract

The utility model relates to a clamping and braking device for a broken elastic wire, which comprises a retaining seat and at least one clamping piece, a first sliding groove extending in the elastic line conveying process direction is formed in the holding seat and comprises at least one inclined face, and the inclined face enables the first sliding groove to be provided with an inlet and an outlet. The width of the outlet is larger than that of the inlet in the width direction; the elastic wire enters the first sliding groove from the inlet, extends out of the first sliding groove from the outlet and is conveyed along the downstream side; the clamping piece is embedded into the first sliding groove, and the clamping piece is configured to do reciprocating motion in the first sliding groove in the conveying process direction of the elastic line; and the clamping piece is used for stopping the elastic wire from retracting to the upstream side in the retracting direction when the elastic wire is broken at the elastic wire breaking point and moves towards the inlet direction of the first sliding groove under the action of gravity. The elastic wire clamping and braking device effectively solves the technical problems that in an existing elastic wire clamping and braking device structure, due to the fact that parts are too small and machining precision is high, machining is difficult, and cost is high.

Description

Technical Field

[0001] The utility model relates to the technical field of disposable sanitary product manufacturing equipment, in particular to the fields of sanitary napkins, diapers, pull-up pants, and more particularly to an elastic line breaking material clamping and braking device. Background Art

[0002] Elastic thread materials are widely used in disposable sanitary products, such as disposable diapers of disposable sanitary products, which include an outer coating layer and an absorbent core arranged inside the outer coating layer, wherein the outer coating layer is an elastic composite structure, usually composed of an outer sheet, an inner sheet, and an elastic thread material arranged between the outer sheet and the inner sheet. Conventional elastic thread materials can be natural rubber strips (threads) or synthetic filamentous (root-shaped) elastic spandex threads, etc. Then, in the manufacturing equipment of disposable sanitary products, a series of process devices for unwinding, conveying, and cutting of elastic thread materials must be set. However, due to its elasticity, the elastic thread material has a certain tension during its operation. However, when the elastic thread material is broken, it will retract from the breaking point to the upper and downstream sides due to the disappearance of tension. In order to prevent the elastic thread material from breaking and retracting, resulting in a large amount of manual time for re-pulling the process path, a material breaking clamping brake device is set at an appropriate position of the elastic thread process to stop the movement of the elastic thread.

[0003] The existing elastic wire clamping and braking device, such as the structure of US Pat. No. 10899574B2, has a pin connected to the base structure, and the pin has a rotation axis; the outer side of the circumference of the pin is provided with a rotating counterweight cam that can rotate around the rotation axis, and a bottom retaining seat positioned adjacent to the rotating counterweight cam. Since the elastic wire is a linear material, the size of the elastic wire clamping and braking device is also very small (usually a size of about 20mm*15mm*8mm can meet the clamping and braking), and the pin is a small component in the device, and the diameter size is only about 3mm to 5mm. In addition, since the counterweight cam needs to be installed outside it, a certain processing accuracy is required. In the actual processing process, if the processing is not precise enough, there will be a gap between the rotating counterweight cam and the bottom retaining seat after installation, resulting in the elastic wire passing through the gap when the material is broken and unable to be clamped and braked. However, if such a small part is processed precisely, it will undoubtedly increase its processing cost to a great extent. Therefore, a new solution needs to be proposed for the structure of the elastic wire clamping and braking device. Utility Model Content

[0004] The utility model provides an elastic wire material breaking clamping and braking device to solve the technical problems of difficult processing and high cost caused by too small parts but high processing precision in the existing elastic wire clamping and braking device structure.

[0005] The technical solution provided by the utility model is as follows:

[0006] One object of the utility model is to provide a clamping and braking device for a broken elastic line, wherein the clamping and braking device is preset at the upstream side of a breaking point of the elastic line, and comprises a retaining seat and at least one clamping member;

[0007] The holding seat is provided with a first slide groove extending along the process direction of the elastic wire conveying, the first slide groove includes at least one inclined surface arranged along the process direction of the elastic wire conveying, and the inclined surface enables the first slide groove to form an inlet and an outlet along the process direction of the elastic wire conveying;

[0008] Wherein, along the width direction, the width of the outlet is greater than the width of the inlet; the width direction is perpendicular to the flow direction of the elastic wire conveying;

[0009] The elastic wire enters the first chute from the inlet, and extends out of the first chute from the outlet, and is transported toward the downstream side along the flow direction of the elastic wire transport;

[0010] The clamping member is embedded in the first chute, and the clamping member is configured to reciprocate in the first chute along the flow direction of the elastic wire; wherein the elastic wire is configured between the retaining seat and the clamping member, or the elastic wire is configured between two of the clamping members;

[0011] The clamping member is used to move the elastic line toward the entrance of the first chute under the action of gravity when the elastic line breaks at the elastic line breaking point, so as to stop the elastic line from retracting toward the upstream side along the retraction direction.

[0012] In a preferred embodiment, the first chute includes a first inclined surface arranged along the flow direction of the elastic wire conveying;

[0013] The clamping member at least includes a second inclined surface matching the first inclined surface, and the elastic line is arranged between the first inclined surface and the second inclined surface;

[0014] When the elastic line is being transported normally, under the action of the tension of the elastic line, the clamping member is driven to move toward the outlet direction of the first chute, so that the second inclined surface is away from or in contact with the first inclined surface;

[0015] When the elastic line breaks at the elastic line breaking point, the clamping member moves toward the entrance direction of the first slide groove under the action of gravity, so that the second slope contacts the first slope, thereby stopping the movement of the elastic line arranged between the first slope and the second slope, so that the elastic line no longer retracts to the upstream side.

[0016] In a preferred embodiment, the retaining seat includes a second slide groove along the process direction of the elastic line conveying; along the process direction of the elastic line conveying, the length dimension of the second slide groove is smaller than the length dimension of the first slide groove; the first inclined surface is located on the side opposite to the second slide groove;

[0017] The clamping member includes a first guide portion along the process direction of the elastic line conveying, and the first guide portion is embedded in the second slide groove;

[0018] When the clamping member reciprocates in the first sliding groove along the process direction of the elastic line conveying, the clamping member moves along the second sliding groove to limit the movement range of the clamping member.

[0019] In a preferred embodiment, the clamping brake device also includes: a fixing member, which is arranged at the outlet of the first slide groove to limit the reciprocating motion of the clamping member in the first slide groove along the process direction of the elastic line conveying, so as to prevent the clamping member from sliding out of the first slide groove.

[0020] In a preferred embodiment, the first chute includes a third inclined surface along the flow direction of the elastic wire conveying, and a first vertical plane along the flow direction of the elastic wire conveying;

[0021] The third inclined surface and the first vertical plane enable the first chute to form the inlet and the outlet;

[0022] The clamping member at least includes a fourth inclined surface matching the third inclined surface, and a second vertical plane matching the first vertical plane; the elastic line is arranged between the first vertical plane and the second vertical plane;

[0023] When the elastic line is being transported normally, under the action of the tension of the elastic line, the clamping member is driven to move toward the outlet direction of the first chute, so that the second vertical plane is away from or in contact with the first vertical plane;

[0024] When the elastic line breaks at the elastic line breaking point, the clamping member moves toward the entrance direction of the first slide groove under the action of gravity, and the fourth inclined surface of the clamping member slides along the third inclined surface of the first slide groove, so that the second vertical plane contacts the first vertical plane, thereby stopping the movement of the elastic line arranged between the first vertical plane and the second vertical plane, so that the elastic line no longer retracts to the upstream side.

[0025] In a preferred embodiment, the retaining seat includes a second slide groove along the process direction of the elastic line conveying; along the process direction of the elastic line conveying, the length dimension of the second slide groove is smaller than the length dimension of the first slide groove;

[0026] The clamping member includes a first guide portion along the process direction of the elastic line conveying, the first guide portion is embedded in the second slide groove, and the third inclined surface matches the fourth inclined surface;

[0027] When the clamping member reciprocates in the first sliding groove along the process direction of the elastic line conveying, the first guiding portion moves along the second sliding groove to limit the movement range of the clamping member.

[0028] In a preferred embodiment, there are two clamping members.

[0029] In a preferred embodiment, the first chute includes a fifth inclined surface and a sixth inclined surface along the flow direction of the elastic wire conveying;

[0030] The fifth inclined surface and the sixth inclined surface enable the first chute to form the inlet and the outlet;

[0031] The clamping member includes a first clamping member and a second clamping member embedded in the first chute; the first clamping member includes a third vertical plane along the process direction of the elastic line conveying, and a seventh inclined plane matching the fifth inclined plane;

[0032] The second clamping member includes a fourth vertical plane along the process direction of the elastic wire conveying, and an eighth inclined surface matching the sixth inclined surface;

[0033] The elastic line is arranged between the third vertical plane and the fourth vertical plane;

[0034] When the elastic wire is being transported normally, under the action of the tension of the elastic wire, the first clamping member and the second clamping member are driven to move toward the outlet direction of the first chute, so that the third vertical plane is away from or in contact with the fourth vertical plane;

[0035] When the elastic line breaks at the elastic line breaking point, the first clamping member moves toward the entrance direction of the first chute under the action of gravity, and the seventh inclined surface of the first clamping member slides along the fifth inclined surface of the first chute; the second clamping member moves toward the entrance direction of the first chute under the action of gravity, and the eighth inclined surface of the second clamping member slides along the sixth inclined surface of the first chute;

[0036] The third vertical plane of the first clamping member contacts the fourth vertical plane of the second clamping member, thereby stopping the movement of the elastic wire arranged between the third vertical plane and the fourth vertical plane, so that the elastic wire no longer retracts to the upstream side.

[0037] In a preferred embodiment, the retaining seat includes a third chute and a fourth chute along the process direction of the elastic line conveying; along the process direction of the elastic line conveying, the length of the third chute and the fourth chute are the same but smaller than the length of the first chute;

[0038] The fifth inclined surface is located on one side of the third chute, and the sixth inclined surface is located on one side of the fourth chute;

[0039] The first clamping member includes a second guide portion along the flow direction of the elastic line, the second guide portion is embedded in the third slide groove, and the seventh inclined surface matches the fifth inclined surface;

[0040] The second clamping member includes a third guide portion along the flow direction of the elastic line, the third guide portion is embedded in the fourth slide groove, and the eighth inclined surface matches the sixth inclined surface;

[0041] When the first clamping member reciprocates in the first chute along the process direction of the elastic line conveying, the first clamping member moves along the third chute to limit the movement range of the first clamping member;

[0042] When the second clamping member reciprocates in the first sliding groove along the process direction of the elastic line conveying, the second clamping member moves along the fourth sliding groove to limit the movement range of the second clamping member.

[0043] In a preferred embodiment, the first chute includes a fifth inclined surface and a sixth inclined surface along the flow direction of the elastic wire conveying;

[0044] The fifth inclined surface and the sixth inclined surface enable the first chute to form the inlet and the outlet;

[0045] The clamping member comprises a first clamping member and a second clamping member embedded in the first chute; the first clamping member is a cylindrical structure, and the second clamping member is a cylindrical structure; the axial direction of the cylinders of the first clamping member and the second clamping member extends perpendicular to the process direction of the elastic wire conveying;

[0046] The elastic line is arranged between the outer circumference surface of the cylindrical structure of the first clamping member and the outer circumference surface of the cylindrical structure of the second clamping member;

[0047] When the elastic wire is being transported normally, under the action of the tension of the elastic wire, the cylindrical structure of the first clamping member and the cylindrical structure of the second clamping member are driven to move toward the outlet direction of the first chute, so that the outer circumference of the cylindrical structure of the first clamping member is away from or in contact with the outer circumference of the cylindrical structure of the second clamping member;

[0048] When the elastic line breaks at the elastic line breaking point, the cylindrical structure of the first clamping member moves toward the entrance direction of the first slide groove under the action of gravity, and the cylindrical structure of the second clamping member moves toward the entrance direction of the first slide groove under the action of gravity, so that the outer circumferential surface of the cylindrical structure of the first clamping member contacts the outer circumferential surface of the spherical structure of the second clamping member, thereby stopping the movement of the elastic line arranged between the outer circumferential surface of the cylindrical structure of the first clamping member and the outer circumferential surface of the cylindrical structure of the second clamping member, so that the elastic line no longer retracts to the upstream side.

[0049] Compared with the prior art, the above technical solution of the utility model has at least the following beneficial effects:

[0050] The utility model provides an elastic wire breaking clamping and braking device, wherein a retaining seat is provided with a first slide extending along the process direction of the elastic wire conveying, the first slide comprising at least one inclined plane arranged along the process direction of the elastic wire conveying, the inclined plane enables the first slide to form an inlet and an outlet along the process direction of the elastic wire conveying; along the width direction, the width of the outlet is greater than the width of the inlet; a clamping member is embedded in the first slide, and reciprocates in the first slide along the process direction of the elastic wire conveying, when the elastic wire breaks at the elastic wire breaking point, the clamping member moves toward the inlet direction of the first slide under the action of gravity, and stops the elastic wire from retracting toward the upstream side along the retraction direction. The elastic wire breaking clamping and braking device proposed by the utility model has few parts, simple structure, and no special precision requirements for installation. The retaining seat and the clamping member involved are traditional structures (inclined plane, vertical plane, etc.), so each part is easy to process and the cost is very low, suitable for mass production, and effectively solves the technical problems of the existing elastic wire clamping and braking device structure, which is difficult to process and high cost due to the small parts but high processing precision.

[0051] The utility model provides an elastic wire breaking clamping and braking device, which is small in size, does not require electrical control, and uses a mechanical structure to achieve braking of the elastic wire, and is applied to the manufacturing equipment of disposable sanitary products. It can be set at any required position, is not restricted by process and space, and saves a lot of time for connecting the elastic wire, thereby improving the production efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0053] Figure 1 It is a front view of an elastic wire breaking material clamping and braking device in Embodiment 1 of the utility model.

[0054] Figure 2 It is a schematic diagram of the separation of a retaining seat and a clamping member of an elastic wire cutting material clamping and braking device in Embodiment 1 of the present utility model.

[0055] Figure 3 It is a side view of an elastic wire breaking clamping and braking device in Embodiment 1 of the utility model.

[0056] Figure 4 It is a front view of an elastic wire cutting clamping and braking device in the second embodiment of the utility model.

[0057] Figure 5 It is a schematic diagram of the separation of a retaining seat and a clamping member of an elastic wire cutting clamping and braking device in Embodiment 2 of the present utility model.

[0058] Figure 6 It is a front view of an elastic wire cutting clamping and braking device in Embodiment 3 of the present utility model.

[0059] Figure 7 It is a front view of an elastic wire cutting clamping and braking device in Embodiment 4 of the present utility model.

[0060] Figure 8 It is a schematic diagram of the separation of a retaining seat and a clamping member of an elastic wire cutting clamping and braking device in Embodiment 4 of the present utility model.

[0061] Fig. 9 It is a front view of an elastic wire material breaking clamping and braking device in Embodiment 5 of the present utility model. DETAILED DESCRIPTION

[0062] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0063] Unless otherwise defined, the technical or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "an" or "the" do not indicate a quantity limitation, but indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and similar terms are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0064] It should be noted that the terms "up", "down", "left", "right", "front", "back", etc. used in the present invention are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0065] Embodiment 1.

[0066] like Figure 1 As shown, during the process of the elastic thread P being conveyed forward along the process direction a of the elastic thread conveying, after the elastic thread P is broken at the elastic thread breaking point P', the elastic thread P located on the upstream side of the elastic thread breaking point P' retracts toward the upstream side due to the disappearance of the tension of the elastic thread P. The direction of retraction toward the upstream side is defined as the retraction direction c. In the present utility model, the retraction direction c refers to the direction opposite to the process direction a of the elastic thread P conveying.

[0067] The process direction a of the elastic line P of the utility model along the elastic line is the vertical direction. Figure 1 The process direction a shown is from bottom to top. The vertical direction here is relative to the horizontal direction of transportation, which does not mean that the process direction a of the elastic line transportation is completely straight.

[0068] Combination Figures 1 to 3 According to an embodiment of the utility model, there is provided an elastic line breaking clamping and braking device 1, which is used to brake the elastic line P after the elastic line breaks at the breaking point P' during the process of conveying the elastic line P along the process direction a of the elastic line conveying to the downstream side, so as to prevent the elastic line P from retracting to the upstream side (retraction direction c) due to the disappearance of tension.

[0069] It is worth noting that the elastic thread breaking point P' here is the point where the elastic thread P is prone to breaking in the manufacturing equipment of disposable sanitary products. There may be multiple workstations in the process, and the position where the elastic thread P is prone to breaking during the conveying process is the elastic thread breaking point P'.

[0070] The utility model provides an elastic thread breaking clamping and braking device 1 which is arranged at the upstream side of the elastic thread breaking point P' along the process direction a of the elastic thread conveying.

[0071] Combination Figures 1 to 3 The clamping brake device 1 of this embodiment includes a retaining seat 11, at least one clamping member 12 and a fixing member 13.

[0072] The retaining seat 11 is provided with a first slide groove 111 extending along the process direction a of the elastic line conveying. The first slide groove 111 includes at least one inclined surface arranged along the process direction a of the elastic line conveying. The inclined surface enables the first slide groove 111 to form an inlet I and an outlet O along the process direction a of the elastic line conveying.

[0073] Along the width direction d, the width of the outlet O is greater than the width of the inlet I. The width direction d is perpendicular to the flow direction a of the elastic thread conveying. The elastic thread P enters the first chute 111 from the inlet I, and extends out of the first chute 111 from the outlet O, and is conveyed to the downstream side along the flow direction a of the elastic thread conveying.

[0074] The clamping member 12 is embedded in the first slide groove 111 and is configured to reciprocate in the first slide groove 111 along the flow direction a of the elastic wire conveying. The elastic wire P is disposed between the retaining seat 11 and the clamping member 12 .

[0075] The clamping member 12 is used to move the elastic wire P toward the entrance I of the first chute 111 under the action of gravity when the elastic wire breaks at the elastic wire breaking point P', so as to stop the elastic wire P from retracting toward the upstream side along the retraction direction c.

[0076] Specifically, in this embodiment, the first chute 111 includes a first inclined surface 1111 arranged along the process direction a of the elastic line conveying. The retaining seat 11 includes a second chute 112 along the process direction a of the elastic line conveying, and along the process direction a of the elastic line conveying, the length dimension of the second chute 112 is smaller than the length dimension of the first chute 111.

[0077] The first inclined surface 1111 is located on a side opposite to the second slide groove 112 . The first inclined surface 1111 and a side surface of the second slide groove 112 form the first slide groove 111 . The first inclined surface 1111 forms an inlet I and an outlet O in the first slide groove 111 .

[0078] The clamping member 12 at least includes a second inclined surface 121 matching the first inclined surface 1111 , and the elastic line P is disposed between the first inclined surface 1111 and the second inclined surface 121 .

[0079] When the elastic wire P is being conveyed normally (without material breakage), the tension of the elastic wire P drives the clamping member 12 to move toward the outlet O of the first chute 111 , so that the second inclined surface 121 moves away from or contacts the first inclined surface 1111 .

[0080] That is, in actual situations, the tension of the elastic wire P is not constant during operation (it is constant in an ideal state), that is, sometimes the tension is larger and sometimes the tension is smaller. When the clamping member 12 is under the action of the larger tension of the elastic wire P, the clamping member 12 moves toward the outlet O of the first chute 111, so that the second inclined surface 121 moves away from the first inclined surface 1111. At this time, a gap is formed between the second inclined surface 121 and the first inclined surface 1111 (this gap varies depending on the tension of the elastic wire P), and the elastic wire P is transported to the downstream side in the gap between the second inclined surface 121 and the first inclined surface 1111.

[0081] In another case, when the elastic line P is under the action of a small tension, the clamping member 12 moves toward the outlet O of the first slide groove 111, and the second inclined surface 121 of the clamping member 12 is not completely separated from the first inclined surface 1111 of the retaining seat 11 due to the small tension generated by the elastic line P. At this time, the second inclined surface 121 of the clamping member 12 and the first inclined surface 1111 of the retaining seat 11 are in contact. The contact here is just that the second inclined surface 121 hits the first inclined surface 1111 through the elastic line P, and there is no clamping state.

[0082] Therefore, during the operation of the elastic wire P, due to the different tensions of the elastic wire P, the clamping member 12 reciprocates in the first slide groove 111 along the process direction a of the elastic wire conveying, so that the elastic wire P is always in a state of contact or distance between the first inclined surface 1111 and the second inclined surface 121, switching back and forth.

[0083] When the elastic line P breaks at the elastic line breaking point P', the clamping member 12 moves toward the entrance I of the first slide groove 111 under the action of gravity, so that the second inclined surface 121 contacts the first inclined surface 1111, thereby stopping the movement of the elastic line P arranged between the first inclined surface 1111 and the second inclined surface 121, so that the elastic line P no longer retracts to the upstream side.

[0084] When the elastic line P breaks at the elastic line breaking point P', the tension of the elastic line P disappears, and the clamping member 12 moves toward the entrance I of the first slide groove 111 under the action of gravity, and the second inclined surface 121 of the clamping member 12 contacts the first inclined surface 1111 of the retaining seat 11 (which is opposite to the direction in which the clamping member 12 moves toward the outlet O of the first slide groove 111 under the tension of the elastic line P during normal transportation). The elastic line P is clamped and braked by the second inclined surface 121 of the clamping member 12 and the first inclined surface 1111 of the retaining seat 11. Therefore, the "contact" here is different from the "contact" expressed when the elastic line P is normally transported.

[0085] Furthermore, in this embodiment, the retaining seat 11 includes a second slide groove 112 along the process direction of the elastic line conveying, and the first inclined surface 1111 is located on a side opposite to the second slide groove 112. The clamping member 12 includes a first guide portion 122 along the process direction a of the elastic line conveying, and the first guide portion 122 is embedded in the second slide groove 112.

[0086] When the clamping member 12 reciprocates in the first chute 111 along the process direction a of the elastic line conveying, the clamping member 12 moves along the second chute 112 to limit the range of movement of the clamping member 12. Specifically, along the process direction a of the elastic line conveying, since the length dimension of the second chute 112 is smaller than the length dimension of the first chute 111, when the first guide portion 122 moves to the bottom of the second chute 112, the clamping member 12 does not move in the first chute 211, which is equivalent to limiting the movement of the clamping member 12 along the process direction a of the elastic line conveying.

[0087] Furthermore, in this embodiment, the clamping brake device 1 further includes a fixing member 13. The fixing member 13 is disposed at the outlet O of the first chute 111 to limit the reciprocating motion of the clamping member 12 in the first chute 111 along the process direction a of the elastic line conveying, so as to prevent the clamping member 12 from sliding out of the first chute 111.

[0088] Embodiment 2.

[0089] Combination Figure 4 and Figure 5 According to an embodiment of the utility model, the clamping brake device 1 of this embodiment includes a retaining seat 11, at least one clamping member 12 and a fixing member 13.

[0090] The retaining seat 11 is provided with a first slide groove 111 extending along the process direction a of the elastic line conveying. The first slide groove 111 includes at least one inclined surface arranged along the process direction a of the elastic line conveying. The inclined surface enables the first slide groove 111 to form an inlet I and an outlet O along the process direction a of the elastic line conveying.

[0091] Along the width direction d, the width of the outlet O is greater than the width of the inlet I. The width direction d is perpendicular to the flow direction a of the elastic thread conveying. The elastic thread P enters the first chute 111 from the inlet I, and extends out of the first chute 111 from the outlet O, and is conveyed to the downstream side along the flow direction a of the elastic thread conveying.

[0092] The clamping member 12 is embedded in the first slide groove 111 and is configured to reciprocate in the first slide groove 111 along the flow direction a of the elastic wire conveying. The elastic wire P is disposed between the retaining seat 11 and the clamping member 12 .

[0093] The clamping member 12 is used to move the elastic wire P toward the entrance I of the first chute 111 under the action of gravity when the elastic wire breaks at the elastic wire breaking point P', so as to stop the elastic wire P from retracting toward the upstream side along the retraction direction c.

[0094] Specifically, in this embodiment, the first slide groove 111 includes a third inclined surface 1113 along the process direction a of the elastic wire conveying, and a first vertical plane 1112 along the process direction a of the elastic wire conveying.

[0095] The retaining seat 11 includes a second chute 112 along the process direction a of the elastic line conveying, and along the process direction a of the elastic line conveying, the length dimension of the second chute 112 is smaller than the length dimension of the first chute 111, and the third inclined surface 1113 is located on one side of the second chute 112. The third inclined surface 1113 and the first vertical plane 1112 surround the first chute 111, so that the first chute 111 forms an inlet I and an outlet O.

[0096] The clamping member 12 at least includes a fourth inclined surface 123 matching the third inclined surface 1113 and a second vertical plane 124 matching the first vertical plane 1112. The elastic line P is disposed between the first vertical plane 1112 and the second vertical plane 124.

[0097] When the elastic wire P is normally transported, the tension of the elastic wire P drives the clamping member 12 to move toward the outlet O of the first slide groove 111 , so that the second vertical plane 124 moves away from or contacts the first vertical plane 1112 .

[0098] When the elastic line P breaks at the elastic line breaking point P', the clamping member 12 moves toward the entrance I of the first slide groove 1111 under the action of gravity, and the fourth inclined surface 123 of the clamping member 12 slides along the third inclined surface 1113 of the first slide groove 111, so that the second vertical plane 124 contacts the first vertical plane 1112, thereby stopping the movement of the elastic line P arranged between the first vertical plane 1112 and the second vertical plane 124, so that the elastic line P no longer retracts to the upstream side.

[0099] Furthermore, in this embodiment, the retaining seat 11 includes a second slide groove 112 along the process direction a of the elastic line conveying, and the third inclined surface 1113 is located on one side of the second slide groove 112 .

[0100] The clamping member 12 includes a first guide portion 122 along the process direction a of the elastic line conveying, the first guide portion 122 is embedded in the second slide groove 112 , and the third inclined surface 1113 matches the fourth inclined surface 123 .

[0101] When the clamping member 12 reciprocates in the first slide groove 111 along the flow direction a of the elastic line conveying, the clamping member 12 moves along the second slide groove 112 to limit the movement range of the clamping member 12 .

[0102] Furthermore, in this embodiment, the clamping brake device 1 further includes a fixing member 13. The fixing member 13 is disposed at the outlet O of the first chute 111 to limit the reciprocating motion of the clamping member 12 in the first chute 111 along the process direction a of the elastic line conveying, so as to prevent the clamping member 12 from sliding out of the first chute 111.

[0103] The other structures of this embodiment are the same as those of the first embodiment and will not be described again here.

[0104] Embodiment three.

[0105] The difference between this embodiment and the second embodiment is that two clamping members 12 are embedded in the first sliding groove 111 .

[0106] like Figure 6 As shown, the clamping brake device 1 of this embodiment includes a retaining seat 11 , two clamping members 12 and a fixing member 13 .

[0107] The retaining seat 11 is provided with a first slide groove 111 extending along the process direction a of the elastic line conveying. The first slide groove 111 includes at least one inclined surface arranged along the process direction a of the elastic line conveying. The inclined surface enables the first slide groove 111 to form an inlet I and an outlet O along the process direction a of the elastic line conveying.

[0108] Along the width direction d, the width of the outlet O is greater than the width of the inlet I. The width direction d is perpendicular to the flow direction a of the elastic thread P. The elastic thread P enters the first chute 111 from the inlet I, and extends out of the first chute 111 from the outlet O, and is transported to the downstream side along the flow direction a of the elastic thread.

[0109] The clamping member 12 is embedded in the first slide groove 111 , and the clamping member 12 is configured to reciprocate in the first slide groove 111 along the flow direction a of the elastic line conveying.

[0110] The clamping member 12 is used to move the elastic wire P toward the entrance I of the first chute 111 under the action of gravity when the elastic wire breaks at the elastic wire breaking point P', so as to stop the elastic wire P from retracting toward the upstream side along the retraction direction c.

[0111] In this embodiment, the two clamping members 12 embedded in the first slide groove 111 are arranged along the flow direction a of the elastic wire conveying. The elastic wire P is arranged between the holding seat 11 and the two clamping members 12 .

[0112] The other structures of this embodiment are the same as those of the second embodiment and will not be described again here.

[0113] Embodiment 4.

[0114] Combination Figure 7 and Figure 8The clamping brake device 1 of this embodiment comprises a retaining seat 11, a clamping member and a fixing member 13. In this embodiment, there are two clamping members, namely a first clamping member 12' and a second clamping member 12". The first clamping member 12' and the second clamping member 12" are symmetrically arranged.

[0115] The retaining seat 11 is provided with a first slide groove 111 extending along the process direction a of the elastic line conveying. The first slide groove 111 includes at least one inclined surface arranged along the process direction a of the elastic line conveying. The inclined surface enables the first slide groove 111 to form an inlet I and an outlet O along the process direction a of the elastic line conveying.

[0116] Along the width direction d, the width of the outlet O is greater than the width of the inlet I. The width direction d is perpendicular to the flow direction a of the elastic thread conveying. The elastic thread P enters the first chute 111 from the inlet I, and extends out of the first chute 111 from the outlet O, and is conveyed to the downstream side along the flow direction a of the elastic thread conveying.

[0117] The clamping members (the first clamping member 12' and the second clamping member 12") are embedded in the first slide groove 111, and the clamping members (the first clamping member 12' and the second clamping member 12") are configured to reciprocate in the first slide groove 111 along the process direction a of the elastic line conveying. The elastic line P is configured between the two clamping members (the first clamping member 12' and the second clamping member 12").

[0118] The clamping members (the first clamping member 12' and the second clamping member 12") are used to move the elastic line P toward the entrance I of the first chute 111 under the action of gravity when the elastic line breaks at the elastic line breaking point P', and stop the elastic line P from retracting toward the upstream side along the retraction direction c.

[0119] Specifically, in this embodiment, the first slide groove 111 includes a fifth inclined surface 1114 and a sixth inclined surface 1115 along the process direction a of the elastic line conveying. The retaining seat 11 includes a third slide groove 112' and a fourth slide groove 112". Along the process direction a of the elastic line conveying, the length dimensions of the third slide groove 112' and the fourth slide groove 112" are the same but smaller than the length dimension of the first slide groove 111.

[0120] The fifth inclined surface 1114 is located at one side of the third slide groove 112 ′, and the sixth inclined surface 1115 is located at one side of the fourth slide groove 112 ″. The fifth inclined surface 1114 and the sixth inclined surface 1115 form an inlet I and an outlet O in the first slide groove 111 .

[0121] The clamping member includes a first clamping member 12 ′ and a second clamping member 12 ″ embedded in the first slide groove 111 . The first clamping member 12 ′ and the second clamping member 12 ″ are symmetrically arranged in the first slide groove 111 .

[0122] The first clamping member 12' includes a third vertical plane 127 along the process direction a of the elastic line conveying, and a seventh inclined plane 125 matching the fifth inclined plane 1114. The second clamping member 12" includes a fourth vertical plane 128 along the process direction a of the elastic line conveying, and an eighth inclined plane 126 matching the sixth inclined plane 1115. The elastic line P is configured between the third vertical plane 127 and the fourth vertical plane 128. The length dimensions of the third chute 112' and the fourth chute 112" along the process direction a of the elastic line conveying are set to be the same, and the third vertical plane 127 and the fourth vertical plane 128 are at the same position along the process direction a of the elastic line conveying, so as to better configure the elastic line P between the third vertical plane 127 and the fourth vertical plane 128.

[0123] When the elastic wire P is normally transported, the first clamping member 12 ′ and the second clamping member 12 ″ are driven to move toward the outlet O of the first slide groove 111 under the tension of the elastic wire P, so that the third vertical plane 127 is away from or contacts the fourth vertical plane 128 .

[0124] When the elastic line P breaks at the elastic line breaking point P', the first clamping member 12' moves toward the entrance I of the first slide groove 111 under the action of gravity, and the seventh inclined surface 125 of the first clamping member 12' slides along the fifth inclined surface 1114 of the first slide groove 111. The second clamping member 12 moves toward the entrance I of the first slide groove 111 under the action of gravity, and the eighth inclined surface 126 of the second clamping member 12" slides along the sixth inclined surface 1115 of the first slide groove 111, so that the third vertical plane 127 of the first clamping member 12' contacts the fourth vertical plane 128 of the second clamping member 12", thereby stopping the movement of the elastic line P arranged between the third vertical plane 127 and the fourth vertical plane 128, so that the elastic line P no longer retracts to the upstream side.

[0125] Furthermore, the retaining seat 11 includes a third slide groove 112' and a fourth slide groove 112" along the process direction a of the elastic line conveying, a fifth inclined surface 1114 is located on one side of the third slide groove 112', and a sixth inclined surface 1115 is located on one side of the fourth slide groove 112".

[0126] The first clamping member 12 ′ includes a second guide portion 122 ′ along the process direction a of the elastic wire conveying, the second guide portion 122 ′ is embedded in the third slide groove 112 ′, and the seventh inclined surface 125 matches the fifth inclined surface 1114 .

[0127] The second clamping member 12 ″ includes a third guide portion 122 ″ along the process direction of the elastic wire conveying, the third guide portion 122 ″ is embedded in the fourth slide groove 112 ″, and the eighth inclined surface 126 matches the sixth inclined surface 1115 .

[0128] When the first clamping member 12' reciprocates in the first chute 111 along the process direction a of the elastic line conveying, the first clamping member 12' moves along the third chute 112' to limit the range of motion of the first clamping member 12'. Specifically, along the process direction a of the elastic line conveying, the length dimension of the third chute 112' is smaller than the length dimension of the first chute 111. When the first clamping member 12' moves to the bottom of the third chute 112', the first clamping member 12' does not move in the first chute 111, which is equivalent to limiting the movement of the first clamping member 12' along the process direction a of the elastic line conveying.

[0129] When the second clamping member 12" reciprocates in the first slide groove 111 along the process direction a of the elastic line conveying, the second clamping member 12" moves along the fourth slide groove 112" to limit the movement range of the second clamping member 12". Similarly, specifically, along the process direction a of the elastic line conveying, the length dimension of the fourth slide groove 112" is smaller than the length dimension of the first slide groove 111. When the second clamping member 12" moves to the bottom of the fourth slide groove 112", the second clamping member 12" does not move in the first slide groove 111, which is equivalent to limiting the movement of the second clamping member 12" along the process direction a of the elastic line conveying.

[0130] Furthermore, in this embodiment, the clamping brake device 1 further includes: a fixing member 13. The fixing member 13 is disposed at the outlet O of the first chute 111, and limits the reciprocating motion of the first clamping member 12' and the second clamping member 12" in the first chute 111 along the process direction a of the elastic line conveying, so as to prevent the first clamping member 12' and the second clamping member 12" from sliding out of the first chute 111.

[0131] The other structures of this embodiment are the same as those of the second embodiment and will not be described again here.

[0132] Embodiment five.

[0133] like Fig. 9 As shown, the clamping brake device 1 of this embodiment includes a retaining seat 11, a clamping member and a fixing member 13. In this embodiment, there are two clamping members, namely a first clamping member 12' and a second clamping member 12". The first clamping member 12' and the second clamping member 12" are symmetrically arranged. The first clamping member 12' is a cylindrical structure, and the second clamping member 12" is a cylindrical structure. The axial direction of the cylinders of the first clamping member 12' and the second clamping member 12" extends perpendicular to the process direction a of the elastic line conveying, and a stopper (not shown in the figure) is arranged along the axial direction of the cylinders of the first clamping member 12' and the second clamping member 12" to prevent the cylinders from axially escaping.

[0134] The retaining seat 11 is provided with a first slide groove 111 extending along the process direction a of the elastic line conveying. The first slide groove 111 includes at least one inclined surface arranged along the process direction a of the elastic line conveying. The inclined surface enables the first slide groove 111 to form an inlet I and an outlet O along the process direction a of the elastic line conveying.

[0135] Along the width direction d, the width of the outlet O is greater than the width of the inlet I. The width direction d is perpendicular to the flow direction a of the elastic thread conveying. The elastic thread P enters the first chute 111 from the inlet I, and extends out of the first chute 111 from the outlet O, and is conveyed to the downstream side along the flow direction a of the elastic thread conveying.

[0136] The clamping members (the first clamping member 12' and the second clamping member 12") are embedded in the first slide groove 111, and the clamping members (the first clamping member 12' and the second clamping member 12") are configured to reciprocate in the first slide groove 111 along the process direction a of the elastic line conveying. The elastic line P is configured between the two clamping members (the first clamping member 12' and the second clamping member 12").

[0137] The clamping members (the first clamping member 12' and the second clamping member 12") are used to move the elastic line P toward the entrance I of the first chute 111 under the action of gravity when the elastic line breaks at the elastic line breaking point P', and stop the elastic line P from retracting toward the upstream side along the retraction direction c.

[0138] Specifically, the first chute 111 includes a fifth inclined surface 1114 and a sixth inclined surface 1115 along the flow direction a of the elastic wire. The fifth inclined surface 1114 and the sixth inclined surface 1115 form an inlet I and an outlet O in the first chute 111.

[0139] The clamping member includes a first clamping member 12 ′ and a second clamping member 12 ″ embedded in the first slide groove 111 . The first clamping member 12 ′ is a cylindrical structure, and the second clamping member 12 ″ is a cylindrical structure. The first clamping member 12 ′ and the second clamping member 12 ″ are symmetrically arranged in the first slide groove 111 .

[0140] The elastic line P is disposed between the outer circumference of the cylindrical structure of the first clamping member 12 ′ and the outer circumference of the cylindrical structure of the second clamping member 12 ″.

[0141] When the elastic wire P is being transported normally, under the tension of the elastic wire P, the cylindrical structure of the first clamping member 12' and the cylindrical structure of the second clamping member 12" are driven to move toward the outlet O of the first slide groove 111, so that the outer circumference of the cylindrical structure of the first clamping member 12' moves away from or contacts the outer circumference of the cylindrical structure of the second clamping member 12".

[0142] When the elastic line P breaks at the elastic line breaking point P', the cylindrical structure of the first clamping member 12' moves toward the entrance I of the first slide groove 111 under the action of gravity, and the cylindrical structure of the first clamping member 12' rolls along the fifth inclined surface 1114. The cylindrical structure of the second clamping member 12" moves toward the entrance I of the first slide groove 11 under the action of gravity, and the cylindrical structure of the second clamping member 12" rolls along the sixth inclined surface 1115, so that the outer circumferential surface of the cylindrical structure of the first clamping member 12' contacts the outer circumferential surface of the cylindrical structure of the second clamping member 12", thereby stopping the movement of the elastic line P arranged between the outer circumferential surface of the cylindrical structure of the first clamping member 12' and the outer circumferential surface of the cylindrical structure of the second clamping member 12", so that the elastic line P no longer retracts to the upstream side.

[0143] Furthermore, in this embodiment, the clamping brake device 1 further includes: a fixing member 13. The fixing member 13 is disposed at the outlet O of the first chute 111, and limits the reciprocating motion of the first clamping member 12' and the second clamping member 12" in the first chute 111 along the process direction a of the elastic line conveying, so as to prevent the first clamping member 12' and the second clamping member 12" from sliding out of the first chute 111.

[0144] There are a few points to note:

[0145] (1) The drawings of the embodiments of the present utility model only relate to the structures related to the embodiments of the present utility model, and other structures may refer to the conventional designs.

[0146] (2) For the sake of clarity, in the drawings used to describe the embodiments of the present invention, the thickness of the layers or regions is enlarged or reduced, that is, these drawings are not drawn according to the actual scale. It is understood that when an element such as a layer, film, region or substrate is referred to as being "on" or "under" another element, the element may be "directly" "on" or "under" the other element or there may be an intermediate element.

[0147] (3) In the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other to obtain new embodiments.

[0148] The above are only specific implementation methods of the present utility model, but the protection scope of the present utility model is not limited thereto. The protection scope of the present utility model shall be based on the protection scope of the claims.

Claims

1. A device for clamping and braking a broken elastic wire, characterized in that: The clamping and braking device is preset at the upstream side of the elastic line breaking point, and includes a retaining seat and at least one clamping member; The holding seat is provided with a first slide groove extending along the process direction of the elastic wire conveying, the first slide groove includes at least one inclined surface arranged along the process direction of the elastic wire conveying, and the inclined surface enables the first slide groove to form an inlet and an outlet along the process direction of the elastic wire conveying; Wherein, along the width direction, the width of the outlet is greater than the width of the inlet; the width direction is perpendicular to the flow direction of the elastic wire conveying; The elastic wire enters the first chute from the inlet, and extends out of the first chute from the outlet, and is transported toward the downstream side along the flow direction of the elastic wire transport; The clamping member is embedded in the first chute, and the clamping member is configured to reciprocate in the first chute along the flow direction of the elastic wire; wherein the elastic wire is configured between the retaining seat and the clamping member, or the elastic wire is configured between two of the clamping members; The clamping member is used to move the elastic line toward the entrance of the first chute under the action of gravity when the elastic line breaks at the elastic line breaking point, so as to stop the elastic line from retracting toward the upstream side along the retraction direction.

2. The clamping brake device according to claim 1, characterized in that: The first slide groove includes a first inclined surface arranged along the flow direction of the elastic line; the clamping member includes at least a second inclined surface matching the first inclined surface, and the elastic line is arranged between the first inclined surface and the second inclined surface; When the elastic line is being transported normally, under the action of the tension of the elastic line, the clamping member is driven to move toward the outlet direction of the first chute, so that the second inclined surface is away from or in contact with the first inclined surface; When the elastic line breaks at the elastic line breaking point, the clamping member moves toward the entrance direction of the first slide groove under the action of gravity, so that the second slope contacts the first slope, thereby stopping the movement of the elastic line arranged between the first slope and the second slope, so that the elastic line no longer retracts to the upstream side.

3. The clamping brake device according to claim 2, characterized in that: The retaining seat comprises a second slide groove along the process direction of the elastic line conveying; along the process direction of the elastic line conveying, the length dimension of the second slide groove is smaller than the length dimension of the first slide groove; the first inclined surface is located on a side opposite to the second slide groove; The clamping member includes a first guide portion along the process direction of the elastic line conveying, and the first guide portion is embedded in the second slide groove; When the clamping member reciprocates in the first sliding groove along the process direction of the elastic line conveying, the clamping member moves along the second sliding groove to limit the movement range of the clamping member.

4. The clamping brake device according to claim 1, characterized in that: The clamping brake device also includes: a fixing member, which is arranged at the outlet of the first slide slot to limit the reciprocating motion of the clamping member in the first slide slot along the process direction of the elastic line conveying to prevent the clamping member from sliding out of the first slide slot.

5. The clamping brake device according to claim 1, characterized in that: The first chute includes a third inclined surface along the process direction of the elastic wire conveying, and a first vertical plane along the process direction of the elastic wire conveying; The third inclined surface and the first vertical plane enable the first chute to form the inlet and the outlet; The clamping member at least includes a fourth inclined surface matching the third inclined surface, and a second vertical plane matching the first vertical plane; the elastic line is arranged between the first vertical plane and the second vertical plane; When the elastic line is being transported normally, under the action of the tension of the elastic line, the clamping member is driven to move toward the outlet direction of the first chute, so that the second vertical plane is away from or in contact with the first vertical plane; When the elastic line breaks at the elastic line breaking point, the clamping member moves toward the entrance direction of the first slide groove under the action of gravity, and the fourth inclined surface of the clamping member slides along the third inclined surface of the first slide groove, so that the second vertical plane contacts the first vertical plane, thereby stopping the movement of the elastic line arranged between the first vertical plane and the second vertical plane, so that the elastic line no longer retracts to the upstream side.

6. The clamping brake device according to claim 5, characterized in that: The retaining seat comprises a second slide groove along the process direction of the elastic line conveying; along the process direction of the elastic line conveying, the length dimension of the second slide groove is smaller than the length dimension of the first slide groove; The clamping member includes a first guide portion along the flow direction of the elastic wire conveying; The first guide portion is embedded in the second slide groove, and the third inclined surface matches the fourth inclined surface; When the clamping member reciprocates in the first sliding groove along the process direction of the elastic line conveying, the first guiding portion moves along the second sliding groove to limit the movement range of the clamping member.

7. The clamping brake device according to claim 5 or 6, characterized in that: There are two clamping pieces.

8. The clamping brake device according to claim 1, characterized in that: The first chute includes a fifth inclined surface and a sixth inclined surface along the flow direction of the elastic wire conveying; The fifth inclined surface and the sixth inclined surface enable the first chute to form the inlet and the outlet; The clamping member includes a first clamping member and a second clamping member embedded in the first chute; the first clamping member includes a third vertical plane along the process direction of the elastic line conveying, and a seventh inclined plane matching the fifth inclined plane; The second clamping member includes a fourth vertical plane along the process direction of the elastic wire conveying, and an eighth inclined surface matching the sixth inclined surface; The elastic line is arranged between the third vertical plane and the fourth vertical plane; When the elastic wire is being transported normally, under the action of the tension of the elastic wire, the first clamping member and the second clamping member are driven to move toward the outlet direction of the first chute, so that the third vertical plane is away from or in contact with the fourth vertical plane; When the elastic line breaks at the elastic line breaking point, the first clamping member moves toward the entrance direction of the first chute under the action of gravity, and the seventh inclined surface of the first clamping member slides along the fifth inclined surface of the first chute; the second clamping member moves toward the entrance direction of the first chute under the action of gravity, and the eighth inclined surface of the second clamping member slides along the sixth inclined surface of the first chute; The third vertical plane of the first clamping member contacts the fourth vertical plane of the second clamping member, thereby stopping the movement of the elastic wire arranged between the third vertical plane and the fourth vertical plane, so that the elastic wire no longer retracts to the upstream side.

9. The clamping brake device according to claim 8, characterized in that: The retaining seat comprises a third chute and a fourth chute along the process direction of the elastic line conveying; along the process direction of the elastic line conveying, the length of the third chute and the fourth chute are the same but smaller than the length of the first chute; The fifth inclined surface is located on one side of the third chute, and the sixth inclined surface is located on one side of the fourth chute; The first clamping member includes a second guide portion along the flow direction of the elastic line, the second guide portion is embedded in the third slide groove, and the seventh inclined surface matches the fifth inclined surface; The second clamping member includes a third guide portion along the flow direction of the elastic line, the third guide portion is embedded in the fourth slide groove, and the eighth inclined surface matches the sixth inclined surface; When the first clamping member reciprocates in the first chute along the process direction of the elastic line conveying, the first clamping member moves along the third chute to limit the movement range of the first clamping member; When the second clamping member reciprocates in the first sliding groove along the process direction of the elastic line conveying, the second clamping member moves along the fourth sliding groove to limit the movement range of the second clamping member.

10. The clamping brake device according to claim 1, characterized in that: The first chute includes a fifth inclined surface and a sixth inclined surface along the flow direction of the elastic wire conveying; The fifth inclined surface and the sixth inclined surface enable the first chute to form the inlet and the outlet; The clamping member comprises a first clamping member and a second clamping member embedded in the first chute; the first clamping member is a cylindrical structure, and the second clamping member is a cylindrical structure; the axial direction of the cylinders of the first clamping member and the second clamping member extends perpendicular to the process direction of the elastic wire conveying; The elastic line is arranged between the outer circumference surface of the cylindrical structure of the first clamping member and the outer circumference surface of the cylindrical structure of the second clamping member; When the elastic wire is being transported normally, under the action of the tension of the elastic wire, the cylindrical structure of the first clamping member and the cylindrical structure of the second clamping member are driven to move toward the outlet direction of the first chute, so that the outer circumference of the cylindrical structure of the first clamping member is away from or in contact with the outer circumference of the cylindrical structure of the second clamping member; When the elastic line breaks at the elastic line breaking point, the cylindrical structure of the first clamping member moves toward the entrance direction of the first slide groove under the action of gravity, and the cylindrical structure of the second clamping member moves toward the entrance direction of the first slide groove under the action of gravity, so that the outer circumferential surface of the cylindrical structure of the first clamping member contacts the outer circumferential surface of the cylindrical structure of the second clamping member, thereby stopping the movement of the elastic line arranged between the outer circumferential surface of the cylindrical structure of the first clamping member and the outer circumferential surface of the cylindrical structure of the second clamping member, so that the elastic line no longer retracts to the upstream side.

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