JPH0678383U - Wire escape prevention device for crane hook - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the wire from escaping from the crane hook. [Structure] A pair of L-shaped members 11 and 12 and a connecting member 14
And one end of the connecting member is rotatably attached to the tip of the long leg of the L-shaped member 11 in a direction orthogonal to the long leg 11b, and the other end is detachably attached to the end of the long leg 12b of the L-shaped member 12. The connecting member has a protrusion 14f at the center thereof that protrudes in the extension direction of the long leg.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a wire escape prevention device for a crane that uses both a wire and a special lifting device such as a tongue and a hanger.

[0002]

[Prior art]

 An example of a wire escape prevention device for a crane hook is disclosed in Japanese Utility Model Publication No. 57-126485. As shown in FIG. 4, this device has a pair of inverted V-shaped metal fittings 5 and 5 (one of the metal fittings 5 is shown in FIG. 4) mounted on a fitting 3 fixed to a neck portion 1a of a crane hook 1 so as to sandwich the neck portion 1a. A corner 5a (not shown) is pivotally supported by a bolt 2, and a stopper pestle 6a that connects one end 5b of one of the inverted V-shaped metal fittings 5 and 5 comes into contact with the inner surface of the claw 1b of the hook 1, and the other The stopper punch 6b connecting the tip 5c is in contact with the back surface 1c of the hook 1. To remove the wire A, rotate the inverted V-shaped metal fitting to move it to the position indicated by the chain double-dashed line in the figure. Good.

This device has a problem that a special hanging tool such as a tongue cannot be hung because the stopper pestle 6a and the like are present in the wire hooking space B of the hook 1 even when moved.

One of the devices that solves this problem is disclosed in Japanese Utility Model Laid-Open No. 56-88778. As shown in FIG. 5, this device pivots the top portion 7a of the side mountain-shaped slip-off prevention member 7 by means of the bolt 2 to the fitting 3 fixed to the neck portion 1a of the crane hook 1, and in this pivoted state. , The locking tip 7b ′ of the one side piece 7b of the disengagement prevention member is extended to the inner engagement surface 1b ′ of the claw portion 1b of the crane hook 1, and the other side piece of the disengagement prevention member is A weight 8 is provided on the portion 7c to rotationally bias the slip-off preventing member, and the locking tip 7b 'of the one side piece of the slip-off preventing member 7 that has been swung biased is attached to the claw portion 1b of the crane hook 1. Of the wire A, etc. hung on the crane hook 1 by being locked to the inner locking surface 1b ′ of the crane, and the one side portion 7b of the locking member 7 along the longitudinal direction thereof. A long groove 9 is provided to allow the shaft portion 2a of the bolt 2 to move, and a retaining portion. 7 of the top part 7a in the long groove 9 curved groove 9a which is curved those configurations that have a (FIG. 7).

Reference numeral 4 is a pin for assembling the wearing tool 3 divided into two parts, and the wearing tool 3 is fixed to the neck portion 1 a with a bolt 2.

This device prevents the lifting tool A such as a wire or tongue from coming out of the hook 1 in the state shown in FIGS. 5 and 6, and prevents the slip-off preventing member 7 from the state shown in FIG. Then, the retaining member 7 is entirely lifted upward, and then the retaining member 7 is moved counterclockwise in FIG. 5 about the bolt 2 to the left in the figure. Set to the state shown in.

In the state of FIG. 7, since the retaining member 7 does not exist in the wire hooking space B of the hook 1 at all, there is an advantage that a special suspending tool such as a tongue can be taken in and out.

[0008]

[Problems to be solved by the device]

 In the devices shown in FIGS. 5, 6 and 7, (a) the detachment prevention member must be lifted as a whole to bring the detachment prevention state into a universal state, and a considerable force is required. (Ii) When the stopper member is moved along the long groove, it cannot be moved smoothly unless it is moved in parallel to the side pieces 7b and 7c of the stopper member. Requires a fair amount of attention.

(B) When the retaining member is in the open state shown in FIG. 7, and the wire 7 or the tongue is to be hung on the hook, if the top portion 7a of the retaining member 7 is erroneously pushed, it will be easy to perform the operation shown in FIG. It will be closed.

(C) In the structure of the retaining member 7 shown in FIG. 5, since the step c exists below the long groove 9, a wire or the like collides with the step c and pushes up the retaining member 7, so that the wire or the like is released from the hook. It may come off.

An object of the present invention is to obtain a wire escape prevention device that solves the above problems.

[0012]

[Means for solving the problem]

 In order to achieve the above object, the present invention rotatably mounts a pair of L-shaped member corners of a wire escape prevention metal fitting so as to sandwich the neck part of a fitting fixed to the neck part of a crane hook. In the wire escape preventing device, the connecting plate for connecting the short leg tips of the L-shaped member is used as a weight, and the central portion of the connecting member for connecting the long leg tips is locked to the inner surface of the hook claw. One end of the member is rotatably attached to the tip of one of the long legs in a direction orthogonal to the long leg, and the other end is detachably attached to the other of the long legs, and the central portion of the member is in the extension direction of the long leg. It is characterized in that it is configured so as to protrude to the inside and the protruding portion is locked to the inner surface of the hook portion of the hook.

[0013]

[Action]

 Since the device of the present invention has the above-mentioned configuration, in order to change the hooking space of the hook from the closed state to the open state, first, the engagement between the other end of the connecting member and the other long leg is released, and then the long leg is released. When the leg is rotated toward the back of the hook, the connecting member turns around the long axis while wandering over the tongue or hook, so that the central protrusion of the connecting member moves to the side of the hook portion of the hook. Since it moves, the connecting member can be rotated without being obstructed by the hook of the hook, and the long leg can be rotated beyond the back surface of the hook and the connecting member can also be rotated to come to the back side of the hook for connection. The other end of the member and the other long leg may be joined together, and the connecting member may be brought into contact with the back surface of the hook.

[0014]

【Example】

 An embodiment of this invention will be described with reference to FIGS.

In these figures, 1, 1a, 1b, 1b ', 2, 3, 4 and A are the same as those shown by the same reference numerals in the above-mentioned conventional example.

Reference numeral 10 is a wire disconnection preventing metal fitting, which is a pair of L-shaped members 11 and 12 rotatably attached to the mounting tool 3 with bolts 2, and short legs 11 a and 12 a of the L-shaped members 11 and 12, respectively. And a connecting member 14 for connecting the distal ends of the long legs 11b and 12b of the L-shaped members 11 and 12, respectively. One end 14a of the connecting member 14 is sandwiched between the bulges 15 and 15 at the tip of one long leg 11b and is rotatably attached in a direction orthogonal to the long leg 11b, and the other end 14b is a standing column 14e. It is fitted into the cylinder of the coupling 16 and connected to the lower end of the long leg 12b, and the central portion thereof has a shape protruding in the extension direction of the long leg.

Although 17 is a weight provided on the connecting plate 13, the connecting plate 13 may be thick and the weight 17 may be removed.

To change the space B of the hook 1 shown in FIG. 2 from the closed state to the opened state, the coupling 16 is moved upward as shown in FIG. 3, and then the two-dot chain line in FIG. The entire wire escape prevention metal fitting 10 is rotated until the long leg and the connecting member come to the position. Then, the central protrusion 14f of the connecting member 14 separates from the inner surface 1b 'of the hook claw 1b and contacts the tongue A. When the wire escape prevention metal fitting 10 is further rotated in the back direction of the hook, the connecting member 14 turns around the long leg 11b while wandering over the tongue A, and the projecting portion 14f of the connecting member 14 moves to the hook claw portion 1b. Move to the side. Here, the connecting member 14 can be rotated to the position indicated by the chain double-dashed line in FIG. 3 without being blocked by the claw portion 1b. After that, the long leg is rotated to a position beyond the back surface of the hook, and the connecting member 14 is further rotated so that the rising column 14e of the connecting member 14 and the long leg 12b are aligned with each other and the coupling 16 is fitted to the rising column 14e. To combine. The protrusion 14f of the connecting member 14 contacts the back surface of the hook (see FIG. 2), and the entire wire escape fitting 10 is locked on the back surface of the hook.

In order to change the open state of the hook space to the closed state, the above operation may be performed in reverse.

In order to detachably engage the rising column 14e and the long leg 12b, for example, a well-known quick joint for high pressure may be used.

[0021]

【effect】

 Since the wire escape prevention device of this invention (i) swings the wire escape prevention metal fitting around the bolt 2, it can be operated with a small force, and (ii) the operation is smooth with no catching points. (Iii) The open state of the hook space can be reliably maintained, and (iiv) Even if the wire or the like collides with the connecting member or the like, the closed state of the hook space does not become the open state. Also, the device is simple.

[Brief description of drawings]

FIG. 1 is a perspective view of an apparatus according to an embodiment of the present invention.

FIG. 2 is a side view thereof.

FIG. 3 is a partial explanatory view of the operation of the above apparatus.

FIG. 4 is a side view of a conventional example.

FIG. 5 is a side view of another example of the conventional example.

FIG. 6 is a front view of the same.

FIG. 7 is a view showing a hook space open state in the same manner.

[Explanation of symbols]

 1 Crane Hook 1a Hook Neck 1b Hook Claw 3 Fitting 10 Wire Ejection Prevention Metal Fitting 11 L-Shaped Member 11a, 11b Short Leg and Long Leg of L-Shaped Metal 11 12 L-Shaped Member 12a, 12b L of the Other Short legs and long legs of the V-shaped metal fitting 14 Connecting members 14a, 14b One end and the other end of the connecting member 14 14f Projecting portion at the center of the connecting member

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Creator Tetsunori Matsuda 1212 Hitomi, Kimitsu, Chiba Prefecture Mishima Kosan Co., Ltd.Kimitsu Division, Inc. (72) Creator Noritaka Mizuki 1212 Hitomi, Kimitsu, Chiba Mishima Mitsushima Stock Company In Kimitsu Division (72) Hideo Yamamoto 1212 Hitomi, Kimitsu City, Chiba Prefecture Mishima Kosan Stock Company In Kimitsu Division, Stock Company (72) Kameda Matsuda 1212 Hitomi, Kimitsu City, Chiba Mishima Stock Company Kimitsu Business Inside (72) Creator Mitsuo Nakamura 1212 Hitomi, Kimitsu City, Chiba Prefecture Kimitsu Division, Mishima Kosan Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A corner of a pair of L-shaped members of a wire escape prevention fitting is rotatably attached to a fitting fixed to a neck portion of a crane hook so as to sandwich the neck portion.
In the wire escape prevention device, wherein a connecting plate for connecting the short leg tips of both L-shaped members is used as a weight, and a central portion of the connecting member for connecting the long leg tips is locked to the inner surface of the hook claw. One end of the member is rotatably attached to the tip of one of the long legs in a direction orthogonal to the long leg, and is detachably attached to the other of the other long legs of the other end, and the central portion projects in the extension direction of the long leg. A device for preventing wire escape from a crane hook, characterized in that the protrusion is configured to engage with the inner surface of the hook claw.