JP4310148B2 - Fiber sling - Google Patents

Description

    The present invention relates to a fiber sling used when a heavy object is suspended and conveyed.

  Conventionally, as a fiber sling that is used when carrying and suspending heavy objects, an endless annular core material in which core yarns are wound in a hook shape is used to prevent damage to the core material when the fiber sling is used. For the purpose of prevention, those coated with a scientific fiber fabric or the like are known.

However, in the fiber sling of the above-mentioned type, the fiber sling is bundled with the core yarn which is a strength support member, and thus the strength reduction or breakage of the core yarn cannot be confirmed. Therefore, the core yarn still has strength. Even in such cases, when the outer skin member is damaged, the safety of the sling strength cannot be confirmed, and it is often discarded. On the other hand, even when the core yarn is cut and the strength of the sling is lowered, the cutting of the core yarn may not be confirmed. Therefore, in order to check the state of the sling, a tongue-shaped part cut in the circumferential direction at the bag end of the outer skin and cut in the lengthwise direction, and a surface fastener for joining the part are provided. There has been proposed a technique in which the joining of the shaped part is released, the part is opened, and the sling is inspected (Patent Document 1).
Japanese Utility Model Publication No.59-11993 (see FIG. 5)

  However, in the fiber sling described above, the outer skin is cut in the circumferential direction, and the tongue-like portions provided in the cut portion are joined by the hook-and-loop fastener. Since it was pulled in the direction of the core material, the joining surface fastener was peeled off, the core material was exposed, and there was a problem that the core material might be damaged. In addition, because there is only one inspection point on the sling, the damage may not be confirmed depending on the damaged part of the core material, and the core material is inspected by the operator's intuition and experience. There was a problem that the disposal standard of sling due to damage was not unified.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems. The invention according to claim 1 is a fiber sling in which a core material in which a core thread is wound in an annular shape and bundled in a hook shape is covered with an outer cover, and is slit in the length direction of the core material. a skin having an inspection opening which opens and, provided inside the opening, and protects the core material, have a opening which opens in the longitudinal direction of the core material, of a different color to the skin A fiber sling comprising an endothelium and an inspection standard display unit that is provided on the inner side of the endothelial opening and represents an inspection standard for determining whether or not the core material can be used, and the invention according to claim 2 which is characterized by comprising at least two positions or more openings in the symmetrical positions of the sling, the invention according to claim 3, endothelial openings provided overlapping the ends together, at one end of the endothelium Install the engagement means from the other end And characterized in that engaged with the other engaging means provided on the flop length apart positions, the invention according to claim 4, provided with the inspection standards display unit on the inner side of the overlapping section of the endothelium It is characterized by this .

  According to the present invention, since the inspection opening provided in the outer skin is slit and opened in the length direction of the core material, the inspection opening is not peeled off even when the choke is hung. Furthermore, since the inner skin is provided inside the inspection opening, the core material is not exposed even if the surface fastener that joins the opening of the outer skin is peeled off, so that the core material can be prevented from being damaged. it can.

  In addition, since the display part indicating the inspection standard for determining whether or not the core material can be used is provided inside the inner skin opening, the inspection standard at the time of the sling inspection can be unified, and the operator can accurately inspect based on the inspection standard. . In addition, since at least two inspection openings are provided at the sling symmetrical positions, the cores at multiple inspection locations can be inspected when part of a small bundle of core yarns is cut or damaged such as fluffing of the core yarns. By comparing the state of the thread, it is possible to easily check for sling abnormalities, and because the outer skin and inner skin have different colors, the inspection opening of the outer skin remains open when the sling is used. Furthermore, the endothelium opening is provided with the ends overlapping each other, and the engaging means provided at one end of the opening is provided at a position separated from the other end by the overlap length. By engaging with the engaging means, it is possible to prevent the core material from being damaged by the engaging means provided at the end of the opening.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  In the figure, 1 is a fiber sling, 2 is a core material in which a core thread is wound in an annular shape and bundled in a hook shape, 3 is an outer skin covering the core material 2, 4 is provided on the outer skin 3, and the length direction of the core material 2 4a is an overlapping portion of the opening 4, 5 is a surface fastener that joins the overlapping portion 4 a of the inspection opening 4, and 6 is inside the inspection opening 4 of the outer skin 3. The endothelium that is provided and protects the core material 2, 6 a is an overlap portion provided in the endothelium opening, 7 is provided in the endothelium 6, and the openings that slit and open in the length direction of the core material 2, 8 a and 8 b are A surface fastener 9 that joins the overlapping portion 7 a of the opening 7 is an inspection standard display unit that is provided inside the endothelial opening and represents an inspection standard that determines whether or not the core material 2 can be used. As shown in FIG. 2, the opening 7 of the endothelium 6 is overlapped and polymerized with the ends overlapping each other, and the surface fastener 8a provided at one end is a surface provided at a position separated from the other end by the overlapping length. Even when the surface fasteners 8a and 8b are peeled off or are displaced and superposed, the surface fastener 8a provided at the end portion does not damage the core material 2. Moreover, the inspection standard display part 9 is sewn inside the overlap part 6a of the inner skin 6, as shown in FIGS. When the core yarn is inspected, the overlap portion 6a of the inner skin 6 is pulled out, so that the inspection reference display portion 9 sewn inside the overlap portion 6a is visually observed by the inspection operator. Can be inspected while comparing the core yarn 2 with the drawings and explanations written on the inspection standard display section 9.

  In the above embodiment, at least two inspection openings 4 are provided at the target position of the sling 1. Further, different colors are used for the outer skin 3 and the inner skin 6 or the hook-and-loop fastener 5.

  The core material 2 is made of synthetic fiber filaments such as polyester-based synthetic fibers, polypropylene-based synthetic fibers, amide fibers, and polyparaphenylin-based synthetic fibers.

  The number of windings and the number of bundles of hooks in which the core material 2 is in a hook shape is adjusted according to the required strength of the fiber sling, and the number of windings and hooks in which the core material 2 is hooked in a fiber sling used for hanging heavy objects. A fiber sling having a large number of bundles is used.

  Next, the sling inspection work process in the present embodiment will be described.

  First, the surface fastener 5 of the inspection opening 4 provided in the outer skin 3 is peeled off, and the inspection opening 4 is opened. Next, the surface fasteners 8a and 8b of the opening 7 provided in the inner skin 6 are peeled off so that the overlap portion 6a of the inner skin 6 is opened, and the inspection standard display portion 9 provided on the inner side of the overlap portion 6a is placed on the inner skin. 6, the core material 2 is inspected from the opening 7 of the inner skin 6, and the suitability of the sling 1 is determined with reference to the inspection standard 9.

  Next, an inspection method for the sling 1 will be described with reference to FIGS.

  In the figure, 10 is a suspended load, 11 is a hook for hanging the sling 1, 12 is a cut portion of the core material 2, 13 is a portion where the fibers of the cut core material 2 are loosened by the reaction of cutting, and 14 is a core material of the sling 1. 2 shows an inspection position, and an inspection opening 4 and an endothelial opening 7 are provided at the position.

  The figure shows an example of inspection when the core material 2 is cut at the center of the suspended load 10, and when the inspection position 14 is at the center of the suspended load 10 as shown in FIG. 5, the inner core at the inspection position 14 is shown. Since a difference in the amount of yarn occurs between the bundle 2a of the material 2 and the outer bundle 2b, the difference in the amount of yarn is compared, and an inspection standard 9 is checked and checked whether or not the sling 1 can be used.

  Next, as shown in FIG. 6, when the inspection position 14 is between the suspended load 10 and the hook 11, the states of the core material 2 in the two openings at the inspection position 14 are compared, and the loosened core material The presence or absence of 2 is checked, and if there is a loose fiber 13, the inspection standard 9 is inspected and confirmed with reference to the inspection standard 9. In this case, the breakage of the core material 2 may be overlooked if there is only one inspection position 14, but the breakage of the core material 2 is not overlooked by providing two or more locations.

  Next, as shown in FIG. 7, when the inspection / inspection position 14 is in the center of the hook 11, as in FIG. 6, the presence / absence of the loose core material 2 from the inspection opening at the inspection position 14 is checked. Then, with reference to the inspection standard 9, the availability of the sling 1 is checked and confirmed.

  In this embodiment, two inspection positions 14 are provided, but more detailed inspection is possible if two or more inspection positions 14 are provided. Also, as described in the inspection method described above, one of the two inspection openings at the inspection position 14 is used as a comparative inspection opening, and the state of the core material is comparatively inspected by each inspection opening. Therefore, a precise inspection is possible.

  According to the fiber sling of the present invention, the inspection opening provided in the outer skin is slit and opened in the length direction of the core material, and the inspection standard is provided inside the opening of the inner skin provided in the opening. Thus, the inspection opening is not opened during use of the sling, and more accurate inspection is possible by referring to the inspection standard, which is useful as a fiber sling.

It is the whole fiber sling outline figure of the present invention. It is an expanded sectional view of the opening part for inspection of FIG. It is a schematic diagram which shows the state which pulled out the inner skin of the opening part for inspection. It is a use state figure of a sling. It is a figure which shows an inspection state. It is a figure which shows an inspection state. It is a figure which shows an inspection state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fiber sling 2 Core material 3 Outer skin 4 Inspection opening 4a Superposition part 5 Surface fastener 6 Endothelium 6a Overlap part 7 Opening part 7a Superposition part 8a Surface fastener 8b Surface fastener 9 Inspection reference | indication display part 10 Hanging load 11 Hook 12 Cut location 13 Loose points 14 Inspection position

Claims (4)

In a fiber sling in which a core material, which is formed by winding a core yarn in an annular shape and covering the core material with a sheath, is covered with an outer skin, an outer skin having an inspection opening that is slit in the length direction of the core material and opened inside the opening. provided to protect the core material, it has a opening which opens in the longitudinal direction of the core member, and endothelium of different color and the skin, provided inside the endothelium opening determines the availability of the core A fiber sling characterized by comprising an inspection standard display unit representing an inspection standard.   The fiber sling according to claim 1, wherein at least two inspection openings are provided at symmetrical positions of the sling. Endothelial openings are provided with end portions overlapping each other, and engaging means provided at one end of the endothelium is engaged with other engaging means provided at a position separated from the other end by the overlap length. The fiber sling according to claim 1, characterized in that: 4. The fiber sling according to claim 3, wherein an inspection standard display portion is provided inside the overlap portion of the endothelium .

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