JP6284196B2 - Shock absorber - Google Patents

Description

  The present invention relates to an impact absorbing device.

  Conventionally, workers who work at high places in steel towers or high-rise buildings are equipped with ropes and safety belts that connect steel frames and workers at the work site, and even if they fall accidentally from high places, The safety belt prevents the operator from dropping excessively and ensures safety. There are also ropes that prevent equipment and facilities suspended from the ceiling from falling on the ground due to an earthquake or the like. In such a rope, when the rope suspends the operator or the equipment, an impact absorbing device is incorporated so that excessive impact is not applied to the operator or the equipment, and various impact absorbing devices have been developed. .

  For example, Patent Document 1 discloses that the middle of a rope is folded, the folded portion is integrally encapsulated with a resin material, and the folded portions of adjacent measures are connected to each other to absorb the impact. An impact mitigating ridge body with improved resistance is described.

  Patent Document 2 describes a fall prevention member including a shock absorbing means having a leaf spring provided with a plurality of slits in the longitudinal direction.

JP 59-197263 A JP 2010-9984 A

  However, the cord structure for impact reduction described in the cited document 1 has a configuration in which folded cord portions are connected to each other and the folded cord portions are simply covered with resin. For loads that are gradually pulled, the striated body expands, but for impacts that are applied instantaneously such as when dropped, the striated body cannot be expanded instantaneously. There is a risk of excessive impact on the person or equipment.

  Moreover, since the leaf spring itself is made of metal, the impact absorbing means of the fall prevention member described in the cited document 2 is similar to the cited document 1, with respect to an instantaneously applied impact such as when dropped. However, since the shock absorbing means cannot be instantaneously extended, there is a possibility of giving an excessive shock to the operator or the equipment.

  The present invention has been made in view of such a problem, and an impact absorbing device capable of absorbing an impact by rapidly expanding even when the impact is instantaneously applied such as when dropped. The purpose is to provide.

  <1> The invention according to claim 1 includes a linear body formed in a corrugated shape, and a resin layer covering an outer periphery of the linear body, and the resin layer includes the linear body. The shock absorber is characterized in that grooves are formed corresponding to the corrugated shape.

  <2> The invention according to claim 2 is the impact absorbing device according to claim 1, wherein the depth of the groove decreases from both end portions of the resin layer toward the central portion. Features.

  <3> The invention according to claim 3 is the impact absorbing device according to claim 1 or 2, wherein the grooves provided at both ends of the resin layer are formed in a V shape. Features an absorption device.

  <4> The invention according to claim 4 is the impact absorbing device according to any one of claims 1 to 3, wherein the groove provided in a central portion of the resin layer is formed in a U-shape. Characterized by a shock absorber.

  <5> The invention according to claim 5 is the impact absorbing device according to claim 4, wherein the shape of the groove of the resin layer is changed from a V shape at both ends of the resin layer to a U shape at the center portion. It features a shock absorber that is in transition.

  <1> The shock absorbing device according to claim 1 includes a linear body formed in a corrugated shape and a resin layer covering an outer periphery of the linear body, and the resin layer includes the linear body. Since a groove is formed corresponding to the corrugated shape of the above, when an instantaneous impact (force in the tensile direction) is applied to the shock absorber, cracks extend one after another from the groove of the resin layer Since the shock absorbing device is extended, an instantaneous shock can be absorbed.

  <2> The impact absorbing device according to claim 2, wherein the depth of the groove decreases from both end portions of the resin layer toward the central portion, and therefore when the impact is applied, the impact absorbing device. Since the both ends of the shock absorber easily extend, it is easier to absorb the initial impact, and it is difficult to extend at the center of the shock absorber, so that the shock applied to the shock absorber can be absorbed so as to attenuate. .

  <3> In the impact absorbing device according to claim 3, since the grooves provided at both ends of the resin layer are formed in a V shape, when the impact is applied, Since both ends are more easily extended, the initial impact can be absorbed more efficiently.

  <4> The impact absorbing device according to claim 4, wherein the groove provided in the central portion of the resin layer is formed in a U-shape, and therefore when the impact is applied, the impact absorbing device is provided. Since the speed at which the shock absorbing device extends can be reduced at the central portion of the, the shock applied to the shock absorbing device can be absorbed so as to further attenuate.

  <5> In the impact absorbing device according to claim 5, since the shape of the groove of the resin layer is changed from a V shape at both ends of the resin layer to a U shape at a central portion, Since both ends of the shock absorbing device are easily stretched when applied, the initial shock can be absorbed more efficiently, and the speed at which the shock absorbing device extends at the center of the shock absorbing device can be reduced. The shock applied to the absorption device can be absorbed so as to further attenuate.

It is explanatory drawing of the impact-absorbing device which shows 1st Embodiment of this invention, (a) is a general view of an impact-absorbing device, (b) is an impact for demonstrating arrangement | positioning of the linear body of (a). It is the figure which described the longitudinal cross-section of the absorber, (c) is a figure explaining operation | movement after the impact absorber of (a) finished absorbing an impact. It is explanatory drawing of the shock absorber which shows 2nd Embodiment of this invention. It is explanatory drawing of the shock absorber for demonstrating the 3rd Embodiment of this invention and the modification of 3rd Embodiment, (a) is a figure of the longitudinal cross-section of the shock absorber of 3rd Embodiment, b) is a longitudinal sectional view of an impact absorbing device in a modified example of the third embodiment, and (c) is a longitudinal sectional view of an impact absorbing device in another modified example of the third embodiment. It is explanatory drawing of the shock absorber for demonstrating 4th Embodiment of this invention, (a) is a figure of the longitudinal cross-section of the shock absorber of 4th Embodiment, (b) is 4th Embodiment. It is a figure of the longitudinal section of the shock absorber in a modification. It is explanatory drawing of the shock absorber which shows 5th Embodiment of this invention. It is explanatory drawing of the shock absorption apparatus which shows 6th Embodiment of this invention. It is explanatory drawing of the shock absorber for demonstrating 7th Embodiment of this invention, (a) is a longitudinal section of the shock absorber for demonstrating arrangement | positioning of the linear body of the shock absorber which shows 7th Embodiment. It is the figure which described the surface, (b) is a whole figure of the impact-absorbing device which shows 7th Embodiment. It is explanatory drawing of the shock absorber which shows 8th Embodiment of this invention.

  Hereinafter, the impact absorbing device of the present invention will be described based on preferred embodiments shown in the drawings.

<First Embodiment>
FIG. 1 is an explanatory view of an impact absorbing device showing a first embodiment of the present invention, (a) is an overall view of the impact absorbing device, and (b) is an explanation of the arrangement of linear bodies in (a). It is the figure which described the longitudinal cross-section of the impact-absorbing apparatus for this, (c) is a figure explaining operation | movement after the impact-absorbing apparatus of (a) finished absorbing an impact.

  Further, in FIG. 1, since the shock absorbing device is schematically illustrated for easy understanding, the dimensional ratio is different from the actual one.

  1A and 1B, the shock absorber 1 includes a linear body 2 formed in a corrugated shape having a folded portion 200, and a resin layer 3 covering the corrugated shape portion of the linear body 2. The resin layer 3 has a plurality of grooves 5 (501, 502, 503, 504, 505, 506, 507 and 508) corresponding to the corrugated shape of the linear body 2. More specifically, the plurality of grooves 5 of the resin layer 3 are provided at the edge of the resin layer 3 that contacts the opposite side of the corrugated folded portion 200.

  Here, when the impact absorbing device 1 receives an impact in the tensile direction (the direction of arrow A), the tensile stress is concentrated in the groove 501 on the upper end side and the groove 508 on the lower end side, and the direction of the dotted arrow B on the resin layer 3. The crack to the progresses. As a result, the shock absorbing device 1 extends when a part of the shock absorbing device 1 is broken. If the shock absorbing device advances along with cracks caused by the grooves 501 and 508 to some extent, next, tensile stress concentrates on the grooves 502 and 507, and new cracks occur in the resin layer 3. . By repeating this, cracks also develop from the groove 504 and the groove 505 arranged at the center of the resin layer 3 finally, and the shock absorbing device expands as described in FIG. To do.

  As described above, the shock absorber 1 of the present embodiment includes the linear body 2 formed in a corrugated shape and the resin layer 3 covering the outer periphery of the linear body 2, and the resin layer 3 is linear. Since the grooves 5 are formed corresponding to the corrugated shape of the body 2, when a momentary impact (force in the tensile direction) is applied to the shock absorbing device 1, the groove 5 of the resin layer 3 is the starting point. Since the crack progresses and the shock absorbing device 1 extends, the instantaneous shock loaded on the shock absorbing device 1 can be absorbed.

  Although the linear body 2 of the impact absorbing device 1 can be constituted by a single wire, it is preferably constituted by a stranded wire (rope) obtained by twisting a plurality of strands. By configuring the linear body 2 with a stranded wire, the folded portion 200 can be easily formed while maintaining the mechanical strength of the linear body 2 because the linear body 2 is excellent in flexibility and mechanical strength.

  The material of the linear body 2 is not particularly limited, but may be a resin such as polyamide, polypropylene, or polyether ether ketone, a synthetic fiber such as an aramid or polyarylate, or a metal such as stainless steel. . Further, a stainless steel metal coated with a resin or a metal outer periphery covered with a synthetic fiber may be used.

  Moreover, as a material of the resin layer 3 which covers the outer periphery of the linear body 2, it can form with rubber | gum etc., such as polyethylene, a polypropylene, polyamide, a polyurethane, a polyacetal, a polycarbonate, an elastomer type, a polybutadiene type, a nitrile type. However, when a resin material or a synthetic fiber is used for the linear body 2, the resin forming the resin layer 3 needs to use a resin having a lower melting point than the resin forming the linear body 2.

  Moreover, although the resin layer 3 of this embodiment has a rectangular parallelepiped form, without being limited to this, if the resin layer 3 covers the linear body 2, the form of the resin layer 3 is It may be a cylindrical shape or a shape in which corners of a rectangular parallelepiped are cut off, and may have other shapes.

  The impact absorbing device 1 of the present embodiment can be manufactured by the following method.

  First, the linear body 2 is set in a corrugated mold, and then a resin for forming the resin layer 3 is poured into the mold. Next, after the resin of the resin layer 3 is cooled, the resin layer 3 covered with the linear body 2 is taken out of the mold, and the resin layer 3 present at a position corresponding to the corrugated shape 200 of the linear body 2. The impact absorbing device 1 can be manufactured by forming the grooves 5 by cutting the resin.

  The groove 5 is formed by cutting the resin of the resin layer 3 or the like. However, the groove 5 is not limited to this, and the resin of the resin layer 3 does not flow into a position corresponding to the corrugated shape 200 of the linear body 2. The groove 5 may be formed by providing a portion in the mold, placing the linear body 2 in the mold, and then pouring the resin forming the resin layer 3 into the mold. Moreover, you may produce the impact-absorbing device 1 by employ | adopting well-known methods other than having described here.

  In the present embodiment, the upper end and the lower end of the linear body 2 covered with the resin layer 3 are arranged so as to pass through the center of the shock absorbing device 1, but the upper end side groove 501 and the lower end groove are arranged. In order to easily generate a crack from 508, the upper end of the linear body 2 covered with the resin layer 3 is arranged toward the groove 501 side (left side of FIG. 1B) from the central portion of the shock absorbing device 1, You may arrange | position the lower end of the linear body 2 covered with the resin layer 3 toward the groove | channel 508 side (right side of FIG.1 (b)) rather than the center part of the shock absorber 1. FIG.

Second Embodiment
Next, the impact absorbing device according to the second embodiment will be described with reference to FIG. 2 focusing on differences from the first embodiment. Portions common to the first embodiment are denoted by the same reference numerals in the drawing.
Note that FIG. 2 schematically shows the shock absorbing device for easy understanding, and therefore the overall dimensions are different from the actual dimensions.

  FIG. 2 is an explanatory view of an impact absorbing device showing a second embodiment of the present invention.

  In FIG. 2, the shock absorber 11 is different from the first embodiment in that the depth (length) of the groove 15 decreases from both end portions (upper and lower ends) of the resin layer 13 toward the central portion. .

  More specifically, the depth (length) of the groove 511 and the groove 518 is the deepest (longest), and then the depth (length) of the groove 512 and the groove 517, the groove 513 and the groove 516 decreases in order. The groove 15 is formed in the resin layer 13 so that the depth (length) of the groove 514 and the groove 515 in the central portion is the shallowest (shorter).

  As described above, since the depth (length) of the groove 15 decreases from both end portions (upper end and lower end) of the resin layer 13 toward the central portion, the impact is applied to the shock absorbing device 11. In addition, since the depth (length) of the groove 511 and the groove 518 is deep (long) at both ends (upper end and lower end) of the shock absorber 11, the crack generated in the resin layer 13 is only the length of the arrow C. Since the shock absorbing device 11 is easily extended, it is easy to absorb the initial shock, and the depth (length) of the groove 514 and the groove 515 is shallow (short) at the center of the shock absorbing device 11. The crack generated in the resin layer 13 is the length of the arrow D, and the impact absorbing device 11 is difficult to expand. Therefore, the impact applied to the impact absorbing device 11 can be absorbed so as to attenuate.

<Third Embodiment>
Next, the impact absorbing device of the third embodiment will be described with a focus on differences from the first embodiment and the second embodiment with reference to FIG. Portions common to the first embodiment and other embodiments are denoted by the same reference numerals in the drawings.

  FIG. 3 is an explanatory view of the shock absorber for explaining the third embodiment of the present invention and a modification of the third embodiment, and (a) is a longitudinal sectional view of the shock absorber of the third embodiment. (B) is a longitudinal sectional view of an impact absorbing device in a modification of the third embodiment, and (c) is a longitudinal sectional view of an impact absorbing device in another variation of the third embodiment. . Note that FIG. 3 schematically shows the shock absorbing device for easy understanding, and thus the overall dimensions are different from the actual ones.

  In FIG. 3A, the shock absorbing device 21 is different from the other grooves 25 in the form of grooves 25 at both ends (upper and lower ends), and the resin layer starts from the side end (left end or right end) of the resin layer 23. The second embodiment differs from the first and second embodiments in that it has a V-shape toward the center of 23.

  More specifically, in FIG. 3A, the groove 521 and the groove 528 at both ends (upper and lower ends) of the resin layer 23 are formed from the side end (left end or right end) of the resin layer 23 to the center of the resin layer 23. On the other hand, the width of the groove is gradually narrowed, and the bottom (closed portion) of the groove is sharply formed to have edges 7a and 7b, and the entire shape of the groove is V-shaped. The other grooves 25 (522, 523, 524, 525, 526 and 527) excluding the groove 521 and the groove 528 have a rectangular shape, and the depth (length) of the groove 25 is equal to both ends of the resin layer 23. It decreases from the part (upper end and lower end) toward the center.

  As described above, the groove 521 and the groove 528 provided at both ends (upper and lower ends) of the resin layer 23 are V-shaped from the side end (left end or right end) of the resin layer 23 toward the center of the resin layer 23. Therefore, when an impact is applied, a crack caused by the groove 521 and the groove 528 is easily extended in the direction of the arrow E, and both ends of the shock absorbing device 21 are further easily extended. The initial impact can be absorbed more efficiently.

  Further, in this embodiment, in order to absorb the shock applied to the shock absorbing device 21 so as to attenuate, the depth (length) of the groove 25 is equal to both end portions of the resin layer 23 as in the second embodiment. It has a form that decreases from the upper end and the lower end toward the center part, and such a form is preferable from the viewpoint of shock absorption, but the depth (length) of the groove as in the first embodiment. May be constant.

  Next, the impact absorbing device 210 showing a modification of the present embodiment will be described. 3B, among the grooves 35 provided in the resin layer 33, the grooves 531 and 538 provided at both end portions (upper and lower ends) of the resin layer 33 are side end portions (left end) of the resin layer 33. Or the right end) toward the center of the resin layer 33, and the width of the groove 531 and the groove 538 becomes narrower toward the center of the resin layer 33 with the boundary portions 8a and 8b as a boundary. The bottom (closed portion) of the groove is formed to have edges 17a and 17b, and only the ends of the groove 531 and the groove 538 are V-shaped. Further, the form of the other grooves 35 (532, 533, 534, 535, 536 and 537) is a rectangular shape as in the third embodiment, and the depth (length) of the groove 35 is the resin layer 33. It decreases as it goes from the both ends (upper end and lower end) to the center.

  Even in the form of such a groove, a crack caused by the groove 531 and the groove 538 is easily extended in the direction of the arrow F, and both ends of the shock absorbing device 210 are easily extended.

  Furthermore, the impact absorbing device 211 showing a modification of the present embodiment will be described. As shown in FIG. 3C, the forms of the grooves 541 and 548 located at both ends (upper and lower ends) of the grooves 45 provided in the resin layer 43 of the shock absorbing device 211 are as shown in FIG. Like the groove 521 and the groove 528 of (a), the entire groove is formed to be V-shaped, and the form of the groove 542 and the groove 547 located in the direction from the groove 541 and the groove 548 to the central portion of the shock absorbing device 211 is formed. However, like the grooves 531 and 538 in FIG. 3B, only the end portions of the grooves are formed in a V shape. The other grooves 45 (543, 544, 545 and 546) have a rectangular shape, and the depth (length) of the groove 45 is directed from the both ends (upper and lower ends) of the resin layer 43 to the center. It is decreasing according to.

  In the case of the shock absorbing device 211 having such a configuration, the crack caused by the groove 541 and the groove 548 easily extends in the direction of the arrow G, and further, the crack caused by the groove 542 and the groove 547 is indicated by the arrow H. Since it becomes easy to extend in the direction, both ends of the impact absorbing device 211 are more easily extended than the impact absorbing device 21, so that the initial impact can be absorbed more efficiently.

<Fourth embodiment>
Next, the impact absorbing device according to the fourth embodiment will be described with reference to FIG. 4 focusing on differences from the first to third embodiments. Portions common to the first embodiment and other embodiments are denoted by the same reference numerals in the drawings.

  FIG. 4 is an explanatory view of the shock absorbing device for explaining the fourth embodiment, (a) is a longitudinal sectional view of the shock absorbing device of the fourth embodiment, and (b) is the fourth embodiment. It is a figure of the longitudinal cross-section of the impact-absorbing device in the modified example.

  4A, in the shock absorbing device 31, the groove 554 and the groove 555 provided in the central portion of the resin layer 53 among the grooves 55 provided in the resin layer 53 have other grooves 55 (551). , 552, 553, 556, 557 and 558), it has a U-shape from the side end (left end or right end) of the resin layer 53 toward the center of the shock absorbing device 31, and other grooves. 55 (551, 552, 553, 556, 557, and 558) is different from the first to third embodiments in that it has a rectangular shape.

  More specifically, in FIG. 4A, the groove 554 and the groove 555 provided in the central portion of the resin layer 53 are the width of the groove from the side end portion (left end or right end) of the resin layer 53 toward the center. Is gradually narrowed, and the entire shape of the groove is U-shaped so that the bottom (closed portion) of the groove has curved portions 9a and 9b. The depth (length) of the groove 55 decreases from both end portions (upper end and lower end) of the resin layer 53 toward the center.

  When the shape of the bottom (blocking portion) of the groove is U-shaped, the shape of the groove is rectangular (square) or the shape of the bottom (blocking portion) of the groove is V-shaped. The stress is easily dispersed at the bottom (occluded portion) of the groove.

  Therefore, the groove 554 and the groove 555 provided in the central portion of the resin layer 53 are formed in a U shape from the side end (left end or right end) of the resin layer 53 toward the center of the resin layer 53. Thus, when an impact is applied, the stress is dispersed by the U-shape of the groove 554 and the groove 555, and the crack caused by the groove 554 and the groove 555 is gently extended in the direction of the arrow M. Since the speed at which the shock absorbing device 31 extends is reduced in the central portion of the, the shock applied to the shock absorbing device 31 can be absorbed so as to be further attenuated.

  Next, an impact absorbing device 310 showing a modification of this embodiment will be described. In FIG. 4B, the groove 564 and the groove 565 provided in the central portion of the resin layer 63 among the grooves 65 provided in the resin layer 63 are resin from the side end (left end or right end) of the resin layer 63. A groove 563 and a groove 566 which are formed in a U shape toward the center of the layer 63 and are adjacent to the upper end or lower end of the resin layer 63 from these grooves are formed from the side end (left end or right end) of the resin layer 63. The width is constant toward the center of the resin layer 63, and the width of the groove is gradually narrowed toward the center of the resin layer 63 with the boundary portions 18a and 18b as a boundary. ) Are formed to have curved portions 19a and 19b, and only the ends of the grooves 563 and 566 are U-shaped. The other grooves 65 (561, 562, 567 and 568) have a rectangular shape, and the depth (length) of the groove 65 is directed from the both ends (upper and lower ends) of the resin layer 63 to the center. It is decreasing according to.

  As described above, since the ends of the grooves 563 and 566 are also formed in a U-shape, stress is dispersed by the U-shape of the grooves 563 and 566 when an impact is applied. Since the crack caused by the groove 563 and the groove 566 extends gently in the direction of the arrow J and the speed at which the shock absorbing device 310 extends is reduced, the shock applied to the shock absorbing device 310 is further attenuated. Can be absorbed into.

  In addition, since the depth (length) of the groove 563 and the groove 566 is deeper (longer) than the depth (length) of the groove 564 and the groove 565, the crack caused by the groove 563 and the groove 566 is indicated by an arrow J. However, since the length of the extending crack is shorter than the length of the crack extending in the direction of the arrow K due to the groove 564 and the groove 565, the impact absorbing device due to the groove 564 and the groove 565 is extended. The extension speed of 310 becomes slower than the extension speed of the shock absorbing device 310 caused by the grooves 563 and 566, and the shock applied to the shock absorbing device 310 can be absorbed so as to further attenuate.

<Fifth Embodiment>
Next, the impact absorbing device of the fifth embodiment will be described with reference to FIG. 5, focusing on differences from the first to fourth embodiments. Portions common to the first embodiment and other embodiments are denoted by the same reference numerals in the drawings.

  FIG. 5 is an explanatory view of an impact absorbing device showing a fifth embodiment. Note that FIG. 5 schematically illustrates the shock absorbing device for easy understanding, and thus the overall dimensions are different from the actual dimensions.

  In FIG. 5, the shock absorbing device 41 is different from the other embodiments in the form of the groove 75 provided in the resin layer 73, and the forms of the grooves 571 and 578 at both ends (upper and lower ends) are the side ends. Part (left end or right end) has a V shape toward the center of the resin layer 73, and the form of the groove 574 and the groove 575 provided in the center portion of the resin layer 73 is the side end (left end). Or from the right end) toward the center of the resin layer 73, which is different from the first to fourth embodiments in that it has a U-shape. The other grooves 75 (572, 573, 576 and 577) have a rectangular shape.

  Since the groove 75 has such a configuration, it is possible to obtain an effect obtained by combining the impact absorbing device 21 of the third embodiment and the impact absorbing device 31 of the fourth embodiment. That is, the groove 571 and the groove 578 provided at both ends (upper and lower ends) of the resin layer 73 of the shock absorbing device 41 according to the present embodiment are from the side end (left end or right end) of the resin layer 73. The cracks caused by the grooves 571 and 578 are easily extended when an impact is applied, and the cracks caused by the grooves 574 and 575 are formed. Can be gradually extended, and the speed at which the shock absorbing device 41 extends in the central portion of the shock absorbing device 41 can be relaxed.

  Thereby, the shock absorbing device 41 easily absorbs the applied initial shock and absorbs the shock so as to attenuate it, so that it is possible to safely protect the worker or the equipment.

  In the present embodiment, the grooves (572, 573, 576, and 577) having a rectangular (quadrangle) shape among the grooves 75 are described with the same depth (length). Without being limited to this, like the shock absorber 11 of the second embodiment, the depth of the groove 75 is reduced from the both ends (upper and lower ends) of the shock absorber 41 toward the central portion. May be.

<Sixth Embodiment>
Next, the impact absorbing device according to the sixth embodiment will be described with reference to FIG. 6 focusing on differences from the first to fifth embodiments. Portions common to the first embodiment and other embodiments are denoted by the same reference numerals in the drawings.

  FIG. 6 is an explanatory view of an impact absorbing device for explaining the sixth embodiment. Note that FIG. 6 schematically illustrates the shock absorbing device for easy understanding, and thus the overall dimensions are different from the actual dimensions.

  In FIG. 6, the shock absorbing device 51 is different from the other embodiments in the form of the groove 85 provided in the resin layer 83. Specifically, the shape of the grooves 581 and 588 at both ends (upper and lower ends) is such that the edge 27a and the bottom (blocking portion) of the groove are sharp from the side end (left end or right end) toward the center of the resin layer 83. 27b, and the groove 582 and the groove 587 adjacent to the center of the resin layer 83 from the groove 581 and the groove 588 are arranged at the side end (left end) of the resin layer 83. Or the right end) toward the center of the resin layer 83, and the widths of the grooves 582 and 587 become narrower toward the center of the resin layer 83 with the boundary portions 28a and 28b as a boundary. Only the ends of the groove 582 and the groove 587 are V-shaped so that the bottom (closed portion) of the groove has edges 37a and 37b having a larger angle than the edges 27a and 27b. Groove 582 and groove 587 The shape of the groove 583 and the groove 586 that are adjacent in the center direction of the resin layer 83 is such that the bottom (blocking portion) of the groove from the side end (left end or right end) of the resin layer 83 toward the center of the resin layer 83. Is formed in a U-shape having curved portions 29a and 29b, and the groove 584 and the groove 585 adjacent to the center of the resin layer 83 from the groove 583 and the groove 586 are arranged on the side edges of the resin layer 83. From the first embodiment to the fifth embodiment in that the bottom (closed portion) of the groove has a U-shape having curved portions 39a and 39b from the portion (left end or right end) toward the center of the resin layer 83. Is different.

  The U-shaped curved portions 29a and 29b of the groove 583 and the groove 586 are U-shaped having a larger curvature at the bottom (blocking portion) of the groove than the U-shaped curved portions 39a and 39b of the groove 584 and the groove 585. In addition, the depth (length) of the grooves 583 and 586 is deeper (longer) than the depth (length) of the grooves 584 and 585.

  As described above, the shape of the groove 581 and the groove 588 has a steep V-shape, and the shape of the groove 582 and the groove 587 has a gentler V-shape than the grooves 581 and 588, and the groove 583 and the groove 588. The shape of 586 has a U-shape with a large curvature (closer to the V-shape), and finally, the shape of the groove 584 and the groove 585 has a gentler U-shape than the grooves 583 and 586. Therefore, since the transition from the V-shape toward the central portion of the resin layer 83 from the both ends (upper and lower ends) of the resin layer 83 is made, the impact absorbing device 51 is applied when an impact is applied. Since both end portions (upper and lower ends) of the arm can easily extend, the initial shock can be absorbed more efficiently, and the speed at which the shock absorbing device 51 extends can be further reduced at the central portion of the shock absorbing device 51. Given to the absorber 51 Impact further absorbed to attenuate, by extension, it is possible to protect the operator or equipment more safely.

<Seventh embodiment>
Next, the impact absorbing device according to the seventh embodiment will be described with reference to FIG. 7, focusing on differences from the first to sixth embodiments. Portions common to the first embodiment and other embodiments are denoted by the same reference numerals in the drawings.

  FIG. 7 is an explanatory view of an impact absorbing device for explaining the seventh embodiment, and (a) of the impact absorbing device for explaining the arrangement of the linear bodies of the impact absorbing device showing the seventh embodiment. It is the figure which described the longitudinal cross-section, (b) is the whole impact-absorbing device which shows 7th Embodiment. Note that FIG. 7 schematically illustrates the shock absorbing device for easy understanding, and thus the overall dimensions are different from the actual dimensions.

  7A, the linear body 20 of the shock absorbing device 61 includes a hatched portion indicating a cross-sectional portion, a two-dot chain line portion (imaginary line) located on the near side of the drawing from the cross-sectional portion, and a back portion of the drawing It is indicated by a broken line portion (hidden line) located on the side. 7A and 7B, the linear body 20 is arranged in a three-dimensional spiral so that the linear body 20 has a corrugated shape having a plurality of spiral end portions 201, and the resin layer 93 is formed. The spiral linear body 20 is covered so as to cover the entire surface, and the resin layer 93 is a spiral continuous groove corresponding to the corrugated shape (spiral end 201) of the linear body 20. 60 (601 to 616), and the groove 60 of this embodiment is formed from the upper end of the resin layer 93 so that the shock absorber 61 is easily cracked. 616 is different from the first to sixth embodiments in that it is formed from the lower end of the resin layer 93.

  Thus, the resin layer 93 of the shock absorbing device 61 has a three-dimensional spiral groove 60, and the shock absorbing device 61 extends from the upper end in the direction of arrow L, and further from the lower end to the direction of arrow N. Since it extends, the linear body can be extended longer than the impact absorbing device that is folded back in two dimensions.

  Moreover, although the cross-sectional form of the groove | channel 60 (601-616) of this embodiment is a substantially rectangular form, it is not limited to this, Adopting the shape of the groove | channel of other embodiment mentioned above. Can do. For example, the shape of the groove 601 and the groove 616 at both ends (upper end and lower end) of the groove 60 is V-shaped, and gradually changes to a U-shape toward the central portion of the resin layer 93, so that the resin layer 93 The shape of the groove 60 (607, 608, 609 and 610) corresponding to the center portion of the groove 60 may be U-shaped, and the depth (length) of the groove 60 is set to both end portions ( You may make it reduce gradually (shallow) toward the center part of the resin layer 93 from an upper end part and a lower end part. In this embodiment, as described above, the groove 60 is formed from the upper end portion of the resin layer 93 and the groove 616 is the lower end portion of the resin layer 93 in order to make the shock absorber 61 easily crack. However, the groove 601 and the groove 616 do not have to be formed from the upper end portion or the lower end portion of the resin layer 93.

<Eighth Embodiment>
Next, the impact absorbing device according to the eighth embodiment will be described with reference to FIG. 8 focusing on differences from the first to seventh embodiments. Portions common to the first embodiment and other embodiments are denoted by the same reference numerals in the drawings.

  FIG. 8 is an explanatory view of an impact absorbing device for explaining the eighth embodiment. In addition, since FIG. 8 typically illustrates the shock absorbing device for easy understanding, the overall dimensions are different from actual ones.

  In FIG. 8, the shock absorbing device 71 includes grooves 95 (591, 592, 593, 596, 597, and 598) among the grooves 95 provided in the resin layer 103, which are discontinuously arranged as perforations. This is different from the other embodiments.

  More specifically, the groove 591 and the groove 598 located at both end portions (upper end portion and lower end portion) of the resin layer 103 in the groove 95 are formed of four discontinuous small independent grooves. The length of the groove 95 (the number of independent small grooves) decreases toward the central portion of 103. That is, the groove 592 and the groove 597 have three discontinuous grooves, the groove 593 and the groove 596 have two discontinuous grooves, and the groove 594 and the groove 595 in the central portion of the resin layer 103 have one groove. ing.

  Thus, since the groove | channel 95 of the impact-absorbing apparatus 71 has many small grooves formed in the both ends (upper end and lower end) of the resin layer 103, the crack resulting from the groove | channel 591 and the groove | channel 598 becomes easy to extend. The initial impact can be absorbed efficiently, and further, since the central portion of the resin layer 103 is formed of one small groove, the extension of cracks caused by the groove 594 and the groove 595 Since it becomes late compared with a groove | channel, the shock absorber 71 becomes difficult to expand | extend and it can absorb efficiently so that the impact provided to the shock absorber 71 may be attenuated.

  Furthermore, in order to control the easiness of extension of cracks caused by the groove, the small groove of the groove 95 is formed, for example, by changing the form of the groove 591 and the groove 598 from the side end (left end or right end) of the resin layer 103 to the center portion. The groove 594 and the groove 595 may have a U-shape as in the other embodiments described above.

  Further, in the groove 591 and the groove 598, the number of grooves may be increased so that the entire length of the groove may be set long. In addition, the length of the independent small groove constituting the groove 591 and the groove 598 may be changed to other lengths. The impact absorbing device 71 may be further extended by making it longer than the independent small grooves constituting the groove.

  Further, the present invention is not limited to the above-described embodiments, and various modifications can be made by those skilled in the art within the technical idea of the present invention.

  For example, the shape of the resin layer may be a rhombus, and a linear body may be arranged from the upper end (top) and the lower end (top) of the rhombus. When the resin layer is a rhombus, the length of the folded linear body is shortened in the vicinity of both ends (upper end and lower end) of the resin layer, and the length of the folded linear body is increased at the center of the resin layer. By doing so, in the initial impact, the impact absorbing device can be easily extended, and a configuration in which the extension speed is reduced toward the central portion can be adopted.

1, 11, 21, 31, 41, 51, 61, 71 Shock absorber 2, 20 Linear body 3, 13, 23, 33, 43, 53, 63,
73, 83, 93, 103 Resin layers 5, 15, 25, 35, 45, 55, 65,
75, 85, 95, 60 Groove 7, 17, 27, 37 Edge 8, 18, 28 Border 9, 19, 29, 39 Curved

Claims (1)

A linear body formed into a corrugated shape;
A rectangular parallelepiped resin layer covering the outer periphery of the linear body,
The said resin layer is an impact-absorbing device with which the groove | channel is formed in the edge part of the resin layer which hits the other side of the said waveform-shaped folding part of the said linear body.

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