JPH0540058Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a device for removing a load-hanging wire rope (hereinafter simply referred to as wire) from a double hook of an overhead crane or the like.

``Prior art'' Conventionally, so-called ball release devices for removing load-hanging wires from crane hooks have been used, for example, in 1983.
Some of these are described in No.-128371 and Utility Model Application Publication No. 149971/1983.

``Problem to be solved by the invention'' By the way, in the wire removal device for double-hanging hooks described in the above-mentioned Utility Model Application Publication No. 56-128371, the width of the arm body is wider than the width of the hook and is constant. Moreover, the hook of the hook gradually becomes thinner towards the tip, so even if a suitable gap is set at the base, as it approaches the tip, the wire will get stuck in the gap and the wire will get caught in the gap. It is not possible to securely remove the wire from the hook as there is a risk of the wire getting caught.

In addition, in the case of the hook described in the above-mentioned Japanese Utility Model Application No. 52-149971, since the width of the ball removal part is constant, the same result as that of the one of the Japanese Utility Model Application No. 56-128371 is caused. The wire rope cannot be reliably removed from the tip of the hook body.

Moreover, when a load lands on the ground and is not under tension, the wire rope often lifts up above the hook of the hook body due to its rigidity, and the bracket moves inside the curved part of the hook body.
In the situation shown in Figure 3 (c), there is a high possibility that the wire rope will get caught on the bracket.

As described above, the wires cannot be removed reliably in the conventional devices described in each of the prior art examples, and cannot be put to practical use.

"Means for Solving the Problems" The present invention has been made to solve the problems of the conventional example as described above, and its gist is to suspend loads on both sides of the lower part of the shaft portion 4a. In a double hook 4 of a crane, which has a hook part 4b for slinging a wire 5, and the upper end of the shaft part 4a is rotatably supported on the lower part of the hook block 3, the double hook 4 is fitted to the outer periphery of the shaft part 4a so as to be vertically slidable. a sliding member 8, wire retaining claws 11 provided on both sides of the upper part of the sliding member 8 so as to oppose the tips of the hook portions 4b, and proximal ends on both sides of the sliding member 8, approximately in the middle thereof. are pivotally mounted, and each wire removing fork 12 is provided such that the wire engaging pawl 12a at the tip slides along the curved surface on the front and rear surfaces of the hook portion 4b by the elastic force of the elastic member, and each wire Each lever 13 has its other end pivotally attached to the intermediate portion of the removal fork 12, and its one end pivotally attached to the lower part of the shaft portion 4a;
The ball removal device for a double hook of a crane is provided on the hook block 3 and includes a drive means for vertically sliding the sliding member 8.

"Operation" According to the present invention, by raising the sliding member 8 with respect to the shaft part 4a of the double hook 4 of the crane by the driving means, each wire can be pulled out at the front and rear surfaces of the hook parts 4b on both sides of the double hook 4. As the retaining pawl 11 rises and moves away from the hook portion 4b, the hook portions 4 on both sides of the double hook 4
While the wire engaging claws 12a are in sliding contact with each other along the tapering curved surface of the front and rear surfaces of b, each wire removing fork 12 is rotated upwardly, and the load hanging wire 5 hooked on each hook portion 4b is removed from each wire. The wire engaging claws 12a of the removal fork 12 push up each hook above the height of the tip of each hook 4b, and the load-hanging wire 5 is securely moved from each hook 4b without interfering with the wire retaining claw 11. It can be removed.

"Example" Next, an example of the device of the present invention will be described below based on the drawings.

As shown in FIG. 1, the upper end of a shaft 4a of a double hook 4 is rotatably supported at the lower part of a hook block 3, which receives a wire 1 hanging from a drive section of an overhead crane with a wire sheave 2. A hook portion 4b for hanging the load-hanging wire 5 is formed on both sides of the lower part of the hook.

The shaft portion 4a of the double hook 4 has a hook portion 4b.
A sling removal device 6 is provided for removing the load hanging wire 5 slung thereon.

The details of this ball removing device 6 will be explained with reference to FIG.

In FIG. 2, reference numeral 7 denotes a sleeve that is fitted and fixed onto the shaft portion 4a of the double hook 4, and a guide groove 7a is provided in the central portion of the sleeve 7 in the longitudinal direction.

Reference numeral 8 denotes a sliding member that is fitted around the outer periphery of the sleeve 7, engages with the guide groove 7a of the sleeve 7, is guided, and slides up and down.

A support member 9 having arms 9a on both sides is rotatably fitted to the outer periphery of the upper end of the sliding member 8, and each arm 9a has a support member 9 provided downwardly at the bottom of the hook block 3. The piston rods 10a of each hydraulic cylinder 10 are connected.

Wire retaining claws 11 are provided on both sides of the sliding member 8 located below the support member 9, respectively.

The base end of each wire removal fork 12 is pivotally attached to both sides of the sliding member 8 located below the wire retaining pawl 11, and the intermediate portion of each wire removal fork 12 is provided with the aforementioned wire removal fork 12. One end of each lever 13 is pivotally attached to the lower front and rear surfaces of the sleeve 7, and the other end of each lever 13 is pivotably attached.

Each tip of the wire removal fork 12 is formed in a U-shape with an inward facing cross section, and a wire engaging pawl 12a is provided inside each tip, as shown in detail in FIG. , are pivotally connected to each other at their rear ends so as to be able to rotate inwardly, and are interposed between each wire engaging claw 12a and each tip of the fork 12 by a coil spring 12b, as shown in FIG. As shown, each wire engaging claw 12a is always connected to the hook portion 4 of the double hook 4.
The wire 5 slides elastically along the curved surface of the front and rear surfaces of the hook 4b, thereby making it possible to reliably push the wire 5 away from the hook portion 4b.

Although the sleeve 7 is fitted and fixed to the shaft portion 4a of the double hook 4, the sliding member 8 may be directly fitted to the shaft portion 4a so as to be vertically slidable without using the sleeve 7. .

Further, the reason why a support member 9 having arms 9a on both sides is rotatably fitted to the outer periphery of the upper end of the sliding member 8 is that if the support member 9 is fixed to the sliding member 8, the support member 9 This is because each hydraulic cylinder 10 to which a piston rod is connected is fixed to the hook block 3, so the shaft portion 4a of the double hook 4 cannot rotate relative to the hook block 3. If the portion 4a is fixed to the hook block 3, the support member 9 may be fixed to the sliding member 8.

Therefore, when unloading a load suspended via the wire 5 hooked to the hook 4b of the double hook 4 of the overhead crane to which the ball removing device 6 of the present invention is attached, it is necessary to unload the load as shown in FIG. As shown in the figure, the tip of each wire retaining pawl 11 is butted against the tip of each hook 4b of the double hook 4, and the wire engaging pawl 12a of each wire removal fork 12 is abutted against the tip of each hook 4b of the double hook 4. 4
From this state, each hydraulic cylinder 10 is actuated by the operation of an overhead crane operator, and the sliding member 8 is raised via the support member 9.

As the sliding member 8 rises, each wire retaining pawl 11 rises, and the base end of each wire removal fork 12 pivotally connected to the sliding member 8 rises, so that the lower part of the sleeve 7 is moved forward and backward. The wire engaging claw 1 of each wire removing fork 12 is connected to the other end of each lever 13 which has one end pivotally attached to the surface and the other end pivotally attached to the intermediate portion of each wire removing fork 12.
2a rotates upward (see FIGS. 2 and 4), and the wires 5 hooked onto the hooks 4b of the double hook 4 are adjusted to the height of the tip of each hook 4b by the wire engaging claws 12a. Each hook portion 4 is pushed up above the
It is pushed out from the tip of b.

"Effect of the invention" According to the invention, by raising the sliding member 8 with the drive means with respect to the shaft part 4a of the double hook 4 of the crane, the front and rear surfaces of the hook parts 4b on both sides of the double hook 4 are As each wire retaining pawl 11 rises and moves away from the hook portion 4b, the wire engaging pawl 12a slides into contact with the front and rear curved surfaces of the hook portions 4b on both sides of the double hook 4, while each wire removal fork 12 rotates upward, and lifts up a load-hanging wire 5 hooked to each hook portion 4b to a height higher than the tip of each hook portion 4b by the wire engaging claw 12a of each wire removal fork 12. The load-hanging wire 5 can be reliably removed from each hook part 4b without interfering with the wire retaining claw 11.

[Brief explanation of the drawing]

Fig. 1 is a front view of a double hook of a crane equipped with a ball removing device according to the present invention, Fig. 2 is a perspective view of a ball removing device according to the present invention, and Fig. 3 is a part of the tip of a wire removing fork. The cutaway plan view and FIG. 4 are explanatory diagrams showing how the wire removal fork slides into contact with the hook of the double hook. 3...Fuck block, 4...Double hook,
4a...Shaft part, 4b...Hook part, 5...Load hanging wire, 6...Ball removing device, 7...Sleeve, 7
a...Guide groove, 8...Sliding member, 9...Supporting member, 9a...Arm, 10...Fluid pressure cylinder, 11...Wire retaining claw, 12...Fork for wire removal, 12a... Wire engagement claw, 12b...Coil spring, 13...Lever.

Claims (1)

[Scope of utility model registration request] In the double hook 4 of the crane, which has a hook part 4b on both sides of the lower part of the shaft part 4a for hanging a load-hanging wire 5, and the upper end of the shaft part 4a is rotatably supported on the lower part of the hook block 3, the shaft part 4a is a sliding member 8 fitted on the outer periphery so as to be vertically slidable;
The hook portion 4b is located on both sides of the upper portion of the sliding member 8.
A wire retaining pawl 11 is provided so as to face the distal end of the sliding member 8, and the proximal end thereof is pivotally attached to both sides of the substantially intermediate portion of the sliding member 8, and the wire engaging pawl 12a at the distal end is adapted to absorb the elastic force of the elastic member. The hook portion 4b
Each fork 12 for wire removal is provided so as to be in sliding contact with the curved surface on the front and rear surfaces of A ball release device for a double hook of a crane, which comprises levers 13 each having one end pivotally connected, and a drive means provided on the hook block 3 for vertically sliding the sliding member 8.