JP2005024091A - Shackle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shackle, preventing drop of a connecting shaft and a nut to have excellent safety. <P>SOLUTION: An insert hole 4 is provided in the forward end part in a pair of opposite shaft parts 4 of a shackle body 1, and the connecting shaft 10 with a head formed of a bolt inserted and removed to and from the insert hole 4 and the nut 20 screw-engaged with the tip part of the connecting shaft 10 are respectively connected to the shackle body 1 by wires 34, 36, whereby the nut 20 removed from the connecting shaft 10 and the connecting shaft 10 drawn out of the insert hole 4 are prevented from dropping to improve the safety. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a shackle used when lifting an object to be lifted such as a construction material at a high place.

  This type of shackle is composed of a shackle body and a connecting shaft, and the shackle body has a U-shape in which a pair of shaft portions are connected to both ends of a bent portion, and an insertion formed at the tip portion of the pair of shaft portions. The connecting shaft is removably inserted into the hole to prevent it from coming off.

  The connecting shaft usually consists of a bolt with a head. To prevent the connection shaft from coming off, one of the insertion holes formed in the pair of shaft portions is a screw hole, and the connection shaft is screw-engaged with the screw hole, or a nut is screw-engaged at the tip of the connection shaft. The method of combining is adopted.

  When lifting construction materials such as steel frames to a high place using the shackle constructed as described above, connect the shackle body to the hoisting wire of the hoist and construct the insertion holes formed in the pair of shafts of the shackle body After aligning with the suspension hole provided in the material and inserting the connecting shaft into the suspension hole and the pair of insertion holes to prevent it from coming off, wind up the winding wire with the winding drum of the hoist and remove the construction material I try to lift it.

  When the construction material is lifted to a predetermined height, the connecting shaft is pulled out and the shackle is removed from the construction material.

  By the way, in the conventionally known shackle, since the shackle body and the connecting shaft are not connected, there is a risk that the connecting shaft may be accidentally dropped when the shackle is removed from the lifting object such as construction materials. Yes, it was extremely dangerous.

  The subject of this invention is providing the shackle excellent in safety | security which can prevent the fall of the connecting shaft or the nut for retaining of the connecting shaft.

  In order to solve the above problems, in the present invention, a U-shaped shackle body in which a pair of opposed shaft portions are connected to both ends of a bent portion, and insertion holes formed in the tip portions of the shaft portions, respectively. A shackle having a connecting shaft with a removable head, wherein the connecting shaft pulled out from the insertion hole is held in a connected state with respect to the shackle body between the shackle body and the head of the connecting shaft. The configuration provided with is adopted.

  Here, as the drop-off preventing means, one made of a flexible wire having one end connected to the shaft portion of the shackle body and the other end connected to the head of the connecting shaft may be adopted, or The ring at one end is fitted to the shaft portion and is prevented from coming off by a flat portion formed at the end of the shaft portion, and the ring at the other end is attached to the outer periphery of the head of the connecting shaft. You may employ | adopt what consists of the wire which has the flexibility which was rotatably fitted and formed in the formed ring groove.

  Moreover, a bolt with a head can be employed as the connecting shaft. The connecting shaft made up of the bolts may have one of the insertion holes formed in the pair of shaft portions as screw holes, and may be prevented from coming off by screw engagement with the screw holes, or a nut may be screwed at the tip of the connecting shaft. It may be engaged to prevent it from coming off.

  In the shackle that prevents the connecting shaft from coming off by screwing the nut, a drop prevention means for holding the nut removed from the connecting shaft in a connected state with respect to the shackle body is provided between the nut and the shackle body. To do.

  When preventing the nut from falling off, form a ring at both ends of the flexible wire, and fit the ring at one end to the shaft portion to prevent it from coming off with a flat portion formed at the end of the shaft portion, A configuration in which the ring at the other end is rotatably fitted in a ring groove formed on the outer periphery of the nut to prevent the ring from coming off can be employed.

  As described above, by providing a drop prevention means for holding the connecting shaft connected to the shackle body between the shackle body and the head of the connecting shaft, the connecting shaft is pulled out of the insertion hole to remove the shackle from the object to be lifted. It is possible to reliably prevent the connecting shaft from dropping during the work of removing the shackle, and to obtain a shackle excellent in safety.

  In addition, by providing a drop prevention means between the nut that is screwed to the end of the connecting shaft and prevents the connecting shaft from coming off, and the shackle body, the nut removed from the connecting shaft is prevented from falling, and safety is improved. An excellent shackle can be obtained.

  Furthermore, by forming a ring at both ends of the wire, one ring is fitted to the shaft portion, and is prevented from coming off by the flat portion at the shaft portion end portion, thereby eliminating the need for forming a connecting piece or a connecting hole in the shaft portion. Therefore, a shackle with a low cost can be obtained.

  In addition, the wire rod inhibits the rotation of the connecting shaft or nut by rotatably fitting the other ring of the wire rod into a ring groove formed on the head of the connecting shaft or the outer periphery of the nut. There is nothing, and the connecting shaft and nut can be attached and removed smoothly.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the shackle body 1 has a U-shape in which a pair of shaft portions 3 are connected to both ends of the bent portion 2. A substantially circular flat portion 3 a is formed at each end of the pair of shaft portions 3, and the connecting shaft 10 can be inserted into and removed from the insertion hole 4 formed in each flat portion 3 a.

  The connecting shaft 10 is composed of a bolt and has a head 11 at the rear end. Further, the connecting shaft 10 is prevented from coming out of the insertion hole 4 by the nut 20 screw-engaged with the distal end portion.

  Between the connecting shaft 10 and the shackle body 1, a drop prevention means 30 is provided for holding the connecting shaft 10 pulled out from the insertion hole 4 in a connected state with respect to the shackle body 1. On the other hand, between the nut 20 and the shackle body 1, a drop prevention means 31 is provided for holding the nut 20 removed from the connecting shaft 10 in a connected state to the shackle body 1.

  The drop-off prevention means 30 for holding the connecting shaft 10 in the connected state with respect to the shackle body 1 has a connecting hole 33 on the outside of one shaft portion 3 of the shackle body 1 and on the surface of the head 11 of the connecting shaft 10. A piece 32a is provided, and the pair of connecting pieces are connected by a flexible wire 34. Here, the wire 34 has such a length that the connecting shaft 10 can be completely pulled out from the pair of insertion holes 4.

  On the other hand, the drop-off preventing means 31 for holding the nut 20 in the connected state with respect to the shackle body 1 is provided with a connecting piece 32b having a connecting hole 35 on the outside of the other shaft portion 3 of the shackle body 1, and the connecting piece 32b is provided with the connecting piece 32b. One end of a flexible wire rod 36 is connected, a ring 37 is provided at the other end of the wire rod 36, and the ring 37 is rotatably fitted in a ring groove 38 formed on the outer periphery of the nut 20 to be removed. It is set to be stopped.

  Here, the length of the wire 36 is such that the nut 20 can be completely removed from the connecting shaft 10. In forming the ring 37, here, a long and narrow metal plate is bent into a ring shape, connecting pieces 37a are provided outward at both ends thereof, and the connecting pieces 37a are connected to the other end of the wire 36. However, the end portion of the wire rod 36 may be bent into a circular shape, and the bent portion and the overlapping portion of the wire rod 36 may be fixed to each other by crushing the sleeve.

  The shackle shown in the embodiment has the above-described structure, and when lifting an object to be lifted such as a construction material, as shown by a chain line in FIGS. 1 and 2, a shackle is attached to the tip of the hoisting wire A of the hoisting machine. Attach, connect the shackle to the lifting object B, and lift the lifting object B by winding the winding wire A.

  As for the connection of the shackle to the lifting object B, the insertion holes 4 provided in the pair of shaft portions 3 of the shackle body 1 are made to coincide with the suspension holes b formed in the lifting object B, and each of the matching holes 4, After inserting the connecting shaft 10 into b, the nut 20 is screwed to the tip of the connecting shaft 10 and tightened.

  Here, since the ring 37 provided at the end of the nut 20 and the wire 36 is rotatably connected, the ring 37 and the wire 36 do not hinder the rotation of the nut 20 when tightening due to the rotation of the nut 20. The nut 20 can be smoothly rotated.

  When the lifting object B is lifted to a predetermined height, the nut 20 is removed, the connecting shaft 10 is pulled out, and the connection between the lifting object B and the shackle is released.

  FIG. 3 shows a state where the shackle is disconnected. In this state, the connecting shaft 10 and the nut 20 are connected to the shackle body 1 via the wires 34 and 36. Even if it is separated from the device, it does not fall, and it is possible to prevent the occurrence of injuries due to the fall of each component, which is extremely safe.

  In the embodiment, the shackle that prevents the connecting shaft 10 from coming off by tightening the nut 20 is shown, but the shackle is not limited to this. For example, a shackle in which one of the insertion holes 4 formed in the pair of shaft portions 3 is a screw hole, and the connection shaft is screw-engaged with the screw hole to prevent the connection shaft from coming off.

  In the example shown in FIG. 1, connecting pieces 32a and 32b having connecting holes 33 and 35 are fixed to each of the pair of shaft portions 3 by welding, and the wires 34 and 36 are connected to the connecting pieces 32a and 32b. However, the connection of the wires 34 and 36 is not limited to this.

  4 (I) to 4 (III) show other examples of the connection of the wires 34 and 36, and FIG. 4 (I) shows that the wire connection ring 40 is fixed to the shaft portion 3 by welding. In FIG. 4 (II), a flat portion 41 is provided in a part of the shaft portion 3 by press molding, and a connecting hole 41a for connecting a wire is formed in the flat portion 41. In FIG. 4 (III), a connecting hole 42 for connecting a wire is directly formed in the shaft portion 3.

  In the embodiment shown in FIG. 1, the connecting piece 32a is fixed to the head 11 of the connecting shaft 10 by welding, and the wire 34 is connected to the connecting hole 33 formed in the connecting piece 32a. 5 (I), a connecting hole 43 may be directly formed in the head 11 of the connecting shaft 10, and the wire 34 may be connected to the connecting hole 43. Alternatively, as shown in FIG. 5 (II). As described above, the head 11 of the connecting shaft 10 may be formed into a disk shape, and the wire 34 may be connected to a ring 44 provided on the disk-shaped head 11.

  6 (I) and 6 (II) show another example of the drop prevention means 30 for preventing the connecting shaft 10 from dropping and the drop prevention means 31 for preventing the nut 20 from falling off. In the drop-off prevention means 30 and 31 shown in this example, both ends of two flexible wire rods 45 are bent, and crimping of a sleeve 46 in which the bent end portions are fitted to overlapping portions of the wire rods 45 is performed. Rings 47, 48 are formed at both ends of each wire 45, and the ring 47 at one end of one wire 45 is fitted to one shaft portion 3 of the shackle body 1 and the ring 47 at one end of the other wire 45. Is fitted to the other shaft portion of the shackle body 1 and is prevented from coming off by a flat portion 3 a formed at the end portion of each shaft portion 3, and the ring 48 at the other end of one wire 45 is connected to the head of the connecting shaft 10. The ring groove 49 formed on the outer periphery of the portion 11 is rotatably fitted to prevent it from coming off, and the ring 48 at the other end of the other wire 45 is rotated in the ring groove 50 formed on the outer periphery of the nut 20. To prevent it from slipping That.

  According to the drop-off prevention means 30 and 31 as described above, the connection between the wire 45 and the shaft portion 3 is a connection in which the ring 47 at one end of the wire 45 is fitted to the shaft portion 3. 1, the attachment of the connecting pieces 32 a and 32 b and the ring 40 shown in FIG. 4 (I) and the formation of the connecting holes 41 a and 42 shown in FIGS. 4 (II) and (III) can be eliminated. , You can get a cheap shackle.

  Further, the connection between the wire rod 45 and the head portion 11 of the connecting shaft 10 and the connection between the wire rod 45 and the nut 20 are the connections in which the ring 48 is rotatably fitted in the ring grooves 49, 50. The connecting shaft 10 and the nut 20 can be attached and detached by rotating one of the connecting shaft 10 and the nut 20.

Partially cutaway front view showing an embodiment of a shackle according to the present invention Side view of FIG. Front view showing the connecting shaft pulled out (I) thru | or (III) is a front view which shows the other example of the connection of the wire with respect to a shaft part. (I), (II) is a front view showing another example of connecting the wire to the connecting shaft (I) is a front view showing another example of drop-off prevention means, and (II) is a side view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shackle body 2 Bending part 3 Shaft part 3a Flat part 4 Insertion hole 10 Connecting shaft 11 Head 20 Nut 30, 31 Fall-off prevention means 34 Wire rod 36 Wire rod 37 Ring 45 Wire rod 47 Ring 48 Ring 49 Ring groove 50 Ring groove

Claims (5)

  In a shackle having a U-shaped shackle body in which a pair of opposed shaft portions are connected to both ends of a bent portion, and a connecting shaft with a head that can be inserted into and removed from an insertion hole formed at each end of the shaft portion. A shackle having a drop prevention means for holding the connecting shaft pulled out of the insertion hole in a connected state with respect to the shackle body is provided between the shackle body and the head of the connecting shaft.   2. The shackle according to claim 1, wherein the drop-off prevention means is made of a flexible wire having one end connected to the shaft portion of the shackle body and the other end connected to the head of the connecting shaft.   The drop-off prevention means has rings at both ends, one end of the ring is fitted to the shaft portion, and is prevented from being detached by a flat portion formed at the end of the shaft portion, and the other end ring is connected to the connecting shaft. The shackle according to claim 1, comprising a flexible wire rod that is rotatably fitted in a ring groove formed on the outer periphery of the head portion and is prevented from coming off.   The connecting shaft is composed of a bolt, and the nut removed from the connecting shaft is connected to the shackle body between the nut and the shackle body, which are screw-engaged with the tip of the bolt to prevent the connecting shaft from coming off. The shackle according to any one of claims 1 to 3, further comprising a dropping prevention means for holding.   The drop-off preventing means has a ring at both ends, and the ring at one end is fitted to the shaft portion and is prevented from coming off by a flat portion formed at the end of the shaft portion, and the ring at the other end is attached to the outer periphery of the nut. The shackle according to claim 4, comprising a flexible wire that is rotatably fitted in the formed ring groove and is prevented from coming off.

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