JP2020138867A - Preventing tool for wire rope entanglement - Google Patents

Abstract

To provide a preventing tool for wire rope entanglement that prevents one hook from becoming entangled in a wire rope that supports the other hook when there are two hooks and two wire ropes.SOLUTION: A preventing tool for wire rope entanglement for a work vehicle comprises at least a first hook, a second hook, a first wire rope supporting the first hook, and a second wire rope supporting the second hook, further including a first area through which the first wire rope is inserted and a second area through which the second wire rope is inserted.SELECTED DRAWING: Figure 1

Description

The present invention relates to a wire rope entanglement prevention jig for preventing wire rope entanglement in a work vehicle such as a mobile crane.

Conventionally, many work vehicles such as mobile cranes have two hooks, a main winding hook and a supplementary winding hook. A plurality of wire ropes are hung on the main winding hook, and the auxiliary winding hook is used. A single wire rope is used.

Normally, when working with either the main winding hook or the auxiliary winding hook, use it for the wire rope on the side you are using by winding up the other hook that is not used as much as possible to shorten the wire. Prevents loose hooks from getting entangled. However, since entanglement cannot be completely suppressed by this method, Patent Document 1 discloses a method of preventing entanglement by passing a plurality of wire ropes through a block for detecting overwinding.

Jikkenhei No. 5-40289

However, the method of Patent Document 1 described above cannot completely prevent entanglement, and when the hook on the unused side is extended, the effect of preventing entanglement is small. In particular, at an actual work site, hooks on the unused side are often left unwound from the viewpoint of work efficiency, and even in such a case, a method for preventing entanglement is required.

Therefore, an object of the present invention is to provide a wire rope entanglement prevention jig that prevents one hook from being entangled with a wire rope that supports the other hook for two hooks and two wire ropes. It is said.

A wire rope for a work vehicle having at least a first hook, a second hook, a first wire rope supporting the first hook, and a second wire rope supporting the second hook. It is an entanglement prevention tool,
The first region through which the first wire rope is inserted and
The second region through which the second wire rope is inserted and
A jig for preventing wire rope entanglement.

For two hooks and two wire ropes, a wire rope entanglement prevention jig can be provided that prevents one hook from being entangled with the wire rope that supports the other hook.

It is the schematic of an example of the work vehicle which concerns on this embodiment. It is the schematic of an example of the wire rope entanglement prevention jig which concerns on this embodiment. It is a schematic diagram explaining the state of the crane when the conventional main winding hook is used. It is the schematic explaining the state of the crane when the wire rope entanglement prevention jig which concerns on this embodiment is used. It is a schematic diagram explaining the state of the crane when the offset is not provided in the wire rope entanglement prevention jig which concerns on this embodiment. It is the schematic explaining the state of the crane when the offset is provided in the wire rope entanglement prevention jig which concerns on this embodiment. It is a schematic perspective view of another example of the wire rope entanglement prevention jig which concerns on this embodiment. It is a schematic top view of another example of the wire rope entanglement prevention jig which concerns on this embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Examples of the work vehicle using the wire rope entanglement prevention jig according to the present embodiment include a mobile crane, an aerial work platform, a wheel loader, a hydraulic excavator, and the like. Examples of the mobile crane include a rough terrain crane, an all terrain crane, a truck crane, a loaded truck crane and the like.

(Crane configuration)
Hereinafter, the overall configuration of the work vehicle using the wire rope entanglement prevention jig as an example according to the present embodiment will be described with reference to the drawings. FIG. 1 shows a schematic view of an example of a work vehicle according to the present embodiment. Note that FIG. 1 shows, as an example, a state in which the suspended load 16 is slung on the main winding hook 17 of the crane wheel 1.

The crane vehicle 1 according to the present embodiment includes a traveling body (carrier) 2 and a swivel base 3. The traveling body 2 is a main body portion (body body) of a vehicle having a traveling function, and has a plurality of wheels and a drive source for driving the wheels and the swivel base 3.

The traveling body 2 is provided with a pair of left and right out triggers 4 (only the right side of the traveling body 2 is shown in FIG. 1) on the front side and the rear side, respectively. Each outrigger 4 can be extended to the left and right and can be stored, and by appropriately extending and touching the ground G, the traveling body 2 is stably supported during work using the boom 8.

The swivel base 3 is provided on the upper part of the traveling body 2 so as to be able to swivel horizontally, and has a cabin 5 and a boom support 6 that can swivel integrally. The cabin 5 is provided with an operation unit 7 for the operator to perform various operations. As various operations, for example, traveling of the traveling body 2, rotation of the swivel base 3, undulation and expansion / contraction of the boom 8, hoisting and lowering of the main winding winch 12 and the auxiliary winding winch 14 provided on the boom support 6, respectively. Examples include overhanging and retracting the outrigger 4, starting and stopping the engine, and the like.

The boom support 6 is a place where the boom 8 is attached, and the base end portion of the boom 8 is attached via the boom root fulcrum pin, and the boom 8 can be undulated around the boom root fulcrum pin. Further, the boom support 6 is provided with an undulating cylinder 9 between the boom support 6 and the boom 8, and the boom 8 is undulated by expanding and contracting the undulating cylinder 9. The boom 8 is configured by storing a plurality of boom portions in a nested manner from the outside to the inside, and expands and contracts by expanding and contracting each expansion and contraction cylinder. Although the boom 8 is a box-shaped jib, it may be a structure that serves as an arm with one end of the swivel base 3 as a fulcrum, and includes a lattice structure jib and an auxiliary jib for extending the boom.

A boom head 11 is provided at the tip of the boom 8. A main winding wire rope 13 that is wound or unwound by a main winding winch 12 and a supplementary winding wire rope 15 that is wound or unwound by a supplementary winding winch 14 are wound around the boom head 11.

A main winding hook 17 on which a hanging load 16 or the like is slung is suspended from the main winding wire rope 13, and the hanging load 16 is raised and lowered together with the main winding hook 17 by hoisting or lowering by the main winding winch 12. The main winding hook 17 usually has a plurality of winding numbers.

A supplementary winding hook 18 on which the suspension load 16 or the like is slung is suspended from the supplementary winding wire rope 15, and the suspension load 16 is raised and lowered together with the supplementary winding hook 18 by hoisting or lowering by the supplementary winding winch 14. The auxiliary winding hook 18 is usually set to a single winding number.

An overwinding prevention device 19 for preventing the main winding hook 17 and the auxiliary winding hook 18 from being excessively wound up is provided at predetermined positions of the main winding wire rope 13 and the auxiliary winding wire rope 15, respectively. The overwinding prevention device 19 is for preventing the main winding hook 17 or the auxiliary winding hook 18 from colliding with the boom tip when the main winding hook 17 or the auxiliary winding hook 18 is excessively wound up. It is a thing.

At the time of use, the boom 8 is appropriately raised and lowered, and each boom portion is appropriately moved back and forth or swiveled, and the main winding hook 17 or the auxiliary winding hook 18 being used is appropriately moved up and down to move the suspended load 16. Further, when the boom 8 is not in use (for example, when traveling), the main winding hook 17 and the auxiliary winding hook 18 are raised most, and each boom portion is retracted most and stored.

Expansion and contraction, undulation and turning of the boom 8, and raising and lowering of the main winding hook 17 and the auxiliary winding hook 18 are performed according to the operation of the operation unit 7. The operation unit 7 outputs an operation signal corresponding to the input operation. The operation signal controls the operation of a drive device such as a hydraulic pump, a directional control valve, and a flow rate control valve. By these operations, the hydraulic motor for turning the swivel base 3 and driving the main winding winch 12 or the auxiliary winding winch 14 and the hydraulic cylinders such as the undulating cylinder 9 and the telescopic cylinder are operated to expand and contract the boom 8. The undulations and turns, and the raising and lowering of the main winding hook 17 or the auxiliary winding hook 18 are performed.

(Configuration example of wire rope entanglement prevention jig)
Next, the overall configuration of the wire rope entanglement prevention jig as an example according to the present embodiment will be described with reference to FIG. FIG. 2 shows a schematic view of an example of the wire rope entanglement prevention jig according to the present embodiment.

As shown in FIG. 2, the wire rope entanglement prevention jig 200 according to the present embodiment has a first plate-shaped portion 204 having a first insertion hole 202 through which the main winding wire rope 13 is inserted as the first wire rope. A first region having a second plate-like portion 208 having a second insertion hole 206 through which the supplementary winding wire rope 15 is inserted as a second wire rope, and these first plates. It has a connecting portion 210 for connecting the shaped portion 204 and the second plate-shaped portion 208. In FIG. 2, a plurality of first insertion holes 202 (four of 202a to 202b in the example of FIG. 2) are provided, and one second insertion hole 206 is usually provided in the main winding hook 17. Is a plurality of winding numbers, and the auxiliary winding hook 18 is a single winding number.

The first plate-shaped portion 204 is provided with a first umbrella-shaped portion 212 that hangs down from the peripheral edge portion of the first plate-shaped portion 204, and the second plate-shaped portion 208 is provided with the second umbrella-shaped portion 208. A second umbrella-shaped portion 214 that hangs down from the peripheral portion of the plate-shaped portion 208 of the above is provided. Although the details will be described later, the first umbrella-shaped portion 212 is for fixing the main winding hook 17 when slinging the suspended load 16 using the auxiliary winding hook 18, and has a second umbrella-shaped portion. The portion 214 is for fixing the auxiliary winding hook 18 when slinging the suspended load 16 using the main winding hook 17.

The connecting portion 210 connecting the first plate-shaped portion 204 and the second plate-shaped portion 208 secures the distance between the main winding wire rope 13 and the auxiliary winding wire rope 15, and the first plate. In order to secure the distance (offset distance) between the shaped portion 204 and the second plate-shaped portion 208, the cross section is preferably Z-shaped. Further, it is preferable that the connecting portion 210 is configured so that the distance between the first plate-shaped portion 204 and the second plate-shaped portion 208 can be changed.

Further, a first window portion 218 that can be opened and closed is formed in a part of the outer peripheral edge of the first insertion hole 202, and the first umbrella-shaped portion 212 is formed in the first window portion 218. It is preferable that the slit 216 for communication is provided. As a result, the main winding wire rope 13 inserted through the first insertion hole 202 can be easily removed from the entanglement prevention jig via the first window portion 218 and the slit 216.

Similarly, a second window portion 220 that can be opened and closed is formed in a part of the outer peripheral edge of the second insertion hole 206, and the second umbrella-shaped portion 214 has a second window portion 220. It is preferable that the slit 216 for communication is provided. As a result, the auxiliary winding wire rope 15 inserted through the second insertion hole 206 can be easily removed from the wire rope entanglement prevention jig 200 via the second window portion 220 and the slit 216.

Further, it is preferable to provide guide rollers (not shown) in the first insertion hole 202 and the second insertion hole 206, respectively, in order to prevent damage to the main winding wire rope 13 and the auxiliary winding wire rope 15.

(Example 1)
Next, the problems of the conventional crane and the effect of the wire rope entanglement prevention jig 200 according to the present embodiment will be described with reference to the drawings. FIG. 3 shows a schematic view illustrating a state of the crane when a conventional main winding hook is used. FIG. 4 shows a schematic view illustrating a state of the crane when the wire rope entanglement prevention jig 200 according to the present embodiment is used. Note that FIGS. 3 and 4, and 5 and 6 described later, schematically show only the peripheral mechanism of the boom 8 for the sake of explanation.

FIG. 3 shows a state in which the suspended load 16 is slinged by using the main winding hook 17. When the main winding hook 17 is used, the auxiliary winding hook 18 may shake significantly during the work, so that the auxiliary winding hook 18 may be entangled with the main winding wire rope 13. This can be suppressed by winding the supplementary winding hook 18 as much as possible to shorten the supplementary winding wire rope 15, but it is not possible to completely prevent entanglement. Further, in an actual work site, in order to improve work efficiency, the auxiliary winding hook 18 is rarely wound up, and the auxiliary winding hook 18 is likely to be entangled with the main winding wire rope 13. The entanglement not only reduces the efficiency of the entire work due to the work to fix it, but also affects the safety because it leads to the breakage of the wire rope. Further, although not shown, when the suspended load 16 is slung using the auxiliary winding hook 18, the main winding hook 17 sways, and the main winding hook 17 comes into contact with the auxiliary winding wire rope 15 and the boom 8. It may have similar problems.

On the other hand, a case where the suspended load 16 is slung by the main winding hook 17 by using the wire rope entanglement prevention jig 200 according to the present embodiment described with reference to FIG. 2 will be described with reference to FIG. 4a. In the work using the main winding hook 17, the auxiliary winding hook 18 is wound above the main winding hook 17. Then, as shown in FIG. 4a, the wire rope entanglement prevention jig 200 according to the present embodiment is arranged directly above the auxiliary winding hook 18. That is, the supplementary winding hook 18 is fixed to the second umbrella-shaped portion 214. Therefore, the distance between the auxiliary winding hook 18 and the main winding wire rope 13 is always constant, and entanglement is prevented.

Further, when working with the single top using the auxiliary winding hook 18, the main winding hook 17 is wound above the auxiliary winding hook 18. Then, as shown in FIG. 4b, the wire rope entanglement prevention jig 200 according to the present embodiment is arranged directly above the main winding hook 17. That is, the main winding hook 17 is fixed to the first umbrella-shaped portion 212. Therefore, the distance between the main winding hook 17 and the auxiliary winding wire rope 15 is always constant, and entanglement is prevented.

When working with a jib using the auxiliary winding hook 18, the main winding hook 17 and the auxiliary winding wire rope 15 are usually separated from each other. Therefore, as shown in FIG. 4c, the above-mentioned entanglement occurs. Problem does not occur. As described with reference to FIG. 2, in the wire rope entanglement prevention jig 200 according to the present embodiment, a second window portion 220 that can be opened and closed is formed on a part of the outer peripheral edge of the second insertion hole 206. The second umbrella-shaped portion 214 is provided with a slit 216 communicating with the second window portion 220. Therefore, the auxiliary winding wire rope 15 can be easily removed from the wire rope entanglement prevention jig 200 via the second window portion 220 and the slit 216.

(Example 2)
Next, with reference to the figure, with reference to an example in which it is preferable to provide an offset between the first plate-shaped portion 204 and the second plate-shaped portion 208 of the wire rope entanglement prevention jig 200 according to the present embodiment. This will be described with reference to the figure. FIG. 5 shows a schematic view illustrating a state of the crane when the wire rope entanglement prevention jig 200 according to the present embodiment is not provided with an offset. Further, FIG. 6 shows a schematic view illustrating a state of the crane when the wire rope entanglement prevention jig 200 according to the present embodiment is provided with an offset. In addition, in FIG. 5 and FIG. 6, the work using the main winding hook 17 will be described as an example.

Normally, the number of hooks of the auxiliary winding hook 18 is smaller than the number of hooks of the main winding hook 17, so that the winding speed of the auxiliary winding hook 18 is faster than the winding speed of the main winding hook 17. Therefore, the braking distance from the reaction to the overwinding prevention device 19 until the hook winding stops is larger in the auxiliary winding hook 18 than in the main winding hook 17, so that the auxiliary winding hook 18 is supplemented as shown in FIG. 5a and the like. The overwinding prevention device 19b on the winding hook 18 side is offset from the overwinding prevention device 19a on the main winding hook 17 side to the ground side (offset distance L in the example shown in FIG. 5a).

In the work using the main winding hook 17, since the auxiliary winding hook 18 is wound above the main winding hook 17 as described above, the present embodiment is directly above the auxiliary winding hook 18 as shown in FIG. 5a. The wire rope entanglement prevention jig 200 according to the above is arranged. Here, as the main winding hook 17 is wound up, the wire rope entanglement prevention jig 200 according to the present embodiment is arranged directly above the main winding hook 17 as shown in FIG. 5b. When the main winding hook 17 is further wound up in this state, it reacts with the overwinding prevention device 19b on the side of the auxiliary winding hook 18 as shown in FIG. 5c. As a result, both wire ropes cannot be wound up, and a lift for an offset distance of L cannot be secured as compared with the case where a wire rope entanglement prevention jig without an offset is not used (for reference, offset). The position of the main winding hook 17 when the wire rope entanglement prevention jig is not used is shown by a broken line).

On the other hand, even when the wire rope entanglement prevention jig 200 according to the present embodiment is provided with an offset, the auxiliary winding hook 18 is wound above the main winding hook 17 as described above, and thus is as shown in FIG. 6a. The wire rope entanglement prevention jig 200 according to the present embodiment is arranged directly above the supplementary winding hook 18. Here, as the main winding hook 17 is wound up, the wire rope entanglement prevention jig 200 according to the present embodiment is arranged directly above the main winding hook 17 as shown in FIG. 6b. When the main winding hook 17 is further wound up in this state, as shown in FIG. 6c, even when the main winding hook 17 reacts with the overwinding prevention device 19b on the auxiliary winding hook 18 side, the lift for the offset distance L is secured. Can be done. Since the offset distance L of the overwinding prevention device 19 differs depending on the type and model of the crane used, the connection portion 210 according to the present embodiment includes the first plate-shaped portion 204 and the second plate-shaped portion 208. It is preferable that the distance between the crane and the crane is variable.

(Other configuration examples of wire rope entanglement prevention jig)
Next, the overall configuration of the wire rope entanglement prevention jig as another example according to the present embodiment will be described with reference to FIGS. 7 and 8. FIG. 7 shows a schematic perspective view of another example of the wire rope entanglement prevention jig according to the present embodiment, and FIG. 8 shows a schematic top view of another example of the wire rope entanglement prevention jig according to the present embodiment. Shown.

As shown in FIG. 7, the wire rope entanglement prevention jig 300 according to the present embodiment is, for example,
The whole is composed of a frame-shaped structural member (frame-shaped member) having a first region 310 having a preferably substantially rectangular cross section and a second region 320 having a preferably substantially rectangular cross section. The first region 310 is mainly a region through which the main winding wire rope 13 is inserted (constrained), and the second region 320 is a region through which the auxiliary winding wire rope 15 is inserted (constrained). Each area will be described in detail.

(First region 310)
As described above, the first region 310 of the wire rope entanglement prevention jig 300 is a region through which the main winding wire rope 13 is inserted. In the first region 310 of the wire rope entanglement prevention jig 300, the first axial direction of the surface (cross section of the frame-shaped structural member) formed by the frame-shaped wire rope entanglement prevention jig 300 (FIG. 7, FIG. In FIG. 8, a first main winding side guide roller 302a extending in the Y-axis direction), a second main winding side guide roller 302b extending in parallel with the first main winding side guide roller 302a, and the wire rope. The first main winding side pin 304a extending in the second axial direction (X-axis direction in FIGS. 7 and 8) of the surface formed by the entanglement prevention jig 300 is parallel to the first main winding side pin 304a. A second main winding side pin 304b, which extends to, is provided. Normally, the first axial direction and the second axial direction are orthogonal to each other, but they do not have to be orthogonal to each other.

Then, as the first wire rope described with reference to FIG. 2, the main winding wire rope 13 includes a first main winding side guide roller 302a, a second main winding side guide roller 302b, and a first main winding. It is inserted into a region (space) surrounded by the side pin 304a and the second main winding side pin 304b. In other words, the main winding wire rope 13 includes a first main winding side guide roller 302a, a second main winding side guide roller 302b, a first main winding side pin 304a, and a second main winding. It is constrained by the side pin 304b.

Depending on the configuration of the crane and the like, the main winding wire rope 13 may be hooked by a plurality of windings, for example, two hooks, three hooks, four hooks, or six hooks. In that case, the main winding wire rope 13 is classified into a wire rope (group) on the boom side and a wire rope (group) on the auxiliary winding hook side. Therefore, the wire rope entanglement prevention jig 300 includes a third main winding side guide roller 302c extending in the first axial direction of the surface formed by the wire rope entanglement prevention jig 300, and the third main winding side guide roller 302c. The fourth main winding side guide roller 302d extending in parallel with the winding side guide roller 302c and the third main winding side pin extending in the second axial direction on the surface formed by the wire rope entanglement prevention jig 300. A 304c and a fourth main winding side pin 304d extending in parallel with the third main winding side pin 304c may be provided. In this case, for example, the wire rope (group) on the boom side includes the first main winding side guide roller 302a, the second main winding side guide roller 302b, the first main winding side pin 304a, and the second main winding side pin 304a. The wire rope (group) on the auxiliary winding hook side is inserted into the area (space) surrounded by the main winding side pin 304b, and the third main winding side guide roller 302c and the fourth main winding side guide roller 302d , The third main winding side pin 304c and the fourth main winding side pin 304d are inserted into a region (space) surrounded by the pin 304c.

Even when a plurality of main winding wire ropes 13 are wound, the third main winding side guide roller 302c, the fourth main winding side guide roller 302d, and the third main winding side pin 304c are used. The configuration may be such that the fourth main winding side pin 304d is not provided. For example, the wire rope (group) on the boom side is provided with the first main winding side guide roller 302a, the second main winding side guide roller 302b, the first main winding side pin 304a, and the second main winding side. The wire rope (group) on the side of the auxiliary winding hook may be configured to simply pass through the wire rope entanglement prevention jig 300 by inserting it into the region (space) surrounded by the pin 304b. On the contrary, even if the wire rope (group) on the boom side simply passes through the wire rope entanglement prevention jig 300 and the wire rope (group) on the auxiliary winding hook side is inserted into the above region. good.

On one side surface side of the first region 310 of the wire rope entanglement prevention jig 300, a first window portion 306a for inserting the wire rope (group) on the boom side into the wire rope entanglement prevention jig 300 is provided. A second window portion 306b is provided for inserting the wire rope (group) on the side of the auxiliary winding hook into the wire rope entanglement prevention jig 300. Therefore, the first main winding side guide roller 302a, the second main winding side guide roller 302b, the third main winding side guide roller 302c, the fourth main winding side guide roller 302d, and the first main winding side pin 304a. , The second main winding side pin 304b, the third main winding side pin 304c, and the fourth main winding side pin 304d are preferably configured to be detachable from the wire rope entanglement prevention jig 300. ..

A plate-shaped member 308 is provided on at least a part of the surface of the first region 310 of the wire rope entanglement prevention jig 300 so that the bottom surface of the wire rope entanglement prevention jig 300 can be placed on the upper surface of the main winding hook 17. It is preferable to provide it.

Further, on the bottom surface side of the first region 310 of the wire rope entanglement prevention jig 300, when the bottom surface of the wire rope entanglement prevention jig 300 is placed on the upper surface of the main winding hook 17, the outer circumference of the main winding hook 17 is placed. An umbrella-shaped member (not shown) may be provided so as to follow the shape.

(Second area 320)
The second region 320 of the wire rope entanglement prevention jig 300 is a region through which the auxiliary winding wire rope 15 is inserted. The second region 320 of the wire rope entanglement prevention jig 300 includes a first auxiliary winding side guide roller 322a extending in the third axial direction of the surface formed by the frame-shaped wire rope entanglement prevention jig 300. The second auxiliary winding side guide roller 322b extending in parallel with the first auxiliary winding side guide roller 322a and the frame-shaped wire rope entanglement prevention jig 300 extend in the fourth axial direction. A first auxiliary winding side pin 324a and a second auxiliary winding side pin 324b extending in parallel with the first auxiliary winding side pin 324a are provided. Although not limited, it is preferable that the third axial direction is the same as the first axial direction and the fourth axial direction is the same as the second axial direction.

The auxiliary winding wire rope 15 includes a first auxiliary winding side guide roller 322a, a second auxiliary winding side guide roller 322b, a first auxiliary winding side pin 324a, and a second auxiliary winding side pin 324b. It is inserted into the area (space) surrounded by. In other words, the auxiliary winding wire rope 15 includes a first auxiliary winding side guide roller 322a, a second auxiliary winding side guide roller 322b, a first auxiliary winding side pin 324a, and a second auxiliary winding side. It is constrained by the side pin 324b.

A third window portion 326 for inserting the auxiliary winding wire rope into the wire rope entanglement prevention jig 300 is provided on at least one side surface side of the second region 320 of the wire rope entanglement prevention jig 300. There is. The first window portion 306a, the second window portion 306b, and the third window portion 326 may be provided on the same side surface side of the wire rope entanglement prevention jig 300, or may be provided on different side surface sides. It may be provided. Therefore, the first auxiliary winding side guide roller 322a, the second auxiliary winding side guide roller 322b, the first auxiliary winding side pin 324a, and the second auxiliary winding side pin 324b are attached to the wire rope entanglement prevention jig 300. It is preferable that the structure is removable.

A second plate shape is also formed on at least a part of the bottom surface of the second region 320 of the wire rope entanglement prevention jig 300 so that the bottom surface of the wire rope entanglement prevention jig 300 can be placed on the upper surface of the auxiliary winding hook 18. It is preferable to provide the member 328.

Further, on the bottom surface side of the second region 320 of the wire rope entanglement prevention jig 300, when the bottom surface of the wire rope entanglement prevention jig 300 is placed on the upper surface of the auxiliary winding hook 18, the outer circumference of the auxiliary winding hook 18 is placed. An umbrella-shaped member (not shown) may be provided so as to follow the shape. When the umbrella-shaped member is provided on the bottom surface side of the second region 320 of the wire rope entanglement prevention jig 300, the umbrella-shaped member may be provided so as to follow the shape of the entire outer circumference of the auxiliary winding hook 18, but the auxiliary winding may be provided. An umbrella-shaped member may be provided only partially, such as only on the main winding hook 17 side of the outer circumference of the hook 18.

In the present embodiment, it is preferable that the horizontal positions (distance from the ground) of the first region 310 and the second region 320 are the same. Depending on the specifications of the crane used, the distance from the ground of the overwinding prevention device on the main winding wire rope 13 side and the distance from the ground of the overwinding prevention device on the auxiliary winding wire rope 15 side may differ. Whether the distance from the ground of the overwinding prevention device on the main winding wire rope 13 side is longer than the distance from the ground of the overwinding prevention device on the auxiliary winding wire rope 15 side, or vice versa. It is preferable that the horizontal positions of the first region 310 and the second region 320 are the same so that the lift loss is small at all undulation angles.

Further, above the second region 320, the first auxiliary winding side guide roller 322a, the second auxiliary winding side guide roller 322b, the first auxiliary winding side pin 324a, and the first auxiliary winding side pin 324a are arranged in the second region 320. A third region (not shown) having the same configuration as the auxiliary winding side pin 324b of 2 may be provided. That is, a plurality of guide rollers may be provided on the side of the auxiliary winding wire rope 15 in the height direction. As a result, when the wire rope entanglement prevention jig 300 is placed on the auxiliary winding hook 18, the inclination of the auxiliary winding hook 18 can be suppressed, so that the appearance is improved.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes that do not deviate from the gist of the present invention are made in the present invention. included.

1: Crane vehicle 2: Traveling body 3: Swing table 4: Out trigger 5: Cabin 6: Boom support 8: Boom 9: Undulating cylinder 11: Boom head 12: Main winding winch 13: Main winding wire rope 14: Supplementary winding winch 15 : Supplementary winding wire rope 16: Suspended load 17: Main winding hook 18: Supplementary winding hook 19: Overwinding prevention device 200: Wire rope entanglement prevention jig 202: First insertion hole 204: First plate-shaped portion 206: First 2 insertion hole 208: 2nd plate-shaped portion 210: Connection portion 212: 1st umbrella-shaped portion 214: 2nd umbrella-shaped portion 216: Slit 218: 1st window portion 220: 2nd window portion 300 : Wire rope entanglement prevention jig 302a: First main winding side guide roller (corresponding to the first guide roller within the scope of the patent claim)
302b: Second main winding side guide roller (corresponding to the second guide roller in the claims)
302c: Third main winding side guide roller (corresponding to the fifth guide roller in the claims)
302d: 4th main winding side guide roller (corresponding to the 6th guide roller in the claims)
304a: First main winding side pin (corresponding to the first pin in the claims)
304b: Second main winding side pin (corresponding to the second pin in the claims)
304c: Third main winding side pin (corresponding to the fifth pin in the claims)
304d: Fourth main winding side pin (corresponding to the sixth pin in the claims)
306a: First window (corresponding to the first window in the claims)
306b: Second window (corresponding to the first window in the claims)
308: First plate-shaped member 310: First region 320: Second region 322a: First auxiliary winding side guide roller (corresponding to the third guide roller in the claims)
322b: Second auxiliary winding side guide roller (corresponding to the fourth guide roller in the claims)
324a: 1st auxiliary winding side pin (corresponding to the 3rd pin in the claims)
324b: Second auxiliary winding side pin (corresponding to the fourth pin in the claims)
326: Third window (corresponding to the second window in the claims)
328: Second plate-shaped member

Claims (12)

A wire rope for a work vehicle having at least a first hook, a second hook, a first wire rope supporting the first hook, and a second wire rope supporting the second hook. It is an entanglement prevention tool,
The first region through which the first wire rope is inserted and
The second region through which the second wire rope is inserted and
A jig for preventing wire rope entanglement. The outer shape of the wire rope entanglement prevention jig is composed of a frame-shaped member.
In the first region, a first guide roller extending in the first axial direction of the surface formed by the frame-shaped member, a second guide roller extending in parallel with the first guide roller, and a second guide roller extending in parallel with the first guide roller. A first pin extending in the second axial direction of the surface formed by the frame-shaped member and a second pin extending in parallel with the first pin are provided.
In the second region, a third guide roller extending in the third axial direction of the surface formed by the frame-shaped member, and a fourth guide roller extending in parallel with the third guide roller are provided. A third pin extending in the fourth axial direction of the surface formed by the frame-shaped member and a fourth pin extending in parallel with the third pin are provided.
The wire rope entanglement prevention jig according to claim 1. The first axial direction and the third axial direction are the same directions, the second axial direction and the fourth axial direction are the same directions, and the first axial direction and the second axial direction are the same. Orthogonal to the axial direction of
The wire rope entanglement prevention jig according to claim 2. In the first region, a fifth guide roller extending in the first axial direction, a sixth guide roller extending in parallel with the fifth guide roller, and an extension in the second axial direction are provided. A fifth pin and a sixth pin extending in parallel with the fifth pin are provided.
The wire rope entanglement prevention jig according to claim 2. A first window portion for inserting the first wire rope is provided on one side surface side of the first region of the frame-shaped member.
A second window portion for inserting the second wire rope is provided on one side surface side of the second region of the frame-shaped member.
The wire rope entanglement prevention jig according to claim 2. A plate-shaped member is provided on the bottom surface side of the first region and / or the second region of the frame-shaped member.
The wire rope entanglement prevention jig according to claim 2. An umbrella-shaped member that follows the outer peripheral shape of the first hook is provided on the bottom surface side of the first region of the frame-shaped member.
An umbrella-shaped member that follows the outer peripheral shape of the second hook is provided on the bottom surface side of the second region of the frame-shaped member.
The wire rope entanglement prevention jig according to claim 2. On the bottom surface side of the second region of the frame-shaped member, an umbrella-shaped member that follows the outer peripheral shape of the second hook is provided only on the first hook side of the second hook. ,
The wire rope entanglement prevention jig according to claim 2. The first region has a first plate-like portion having a first insertion hole through which the first wire rope is inserted.
The second region has a second plate-like portion having a second insertion hole through which the second wire rope is inserted.
Further, it has a connecting portion for connecting the first plate-shaped portion and the second plate-shaped portion.
The first plate-shaped portion is provided with a first umbrella-shaped portion that hangs down from the peripheral edge portion of the first plate-shaped portion.
The second plate-shaped portion is provided with a second umbrella-shaped portion that hangs down from the peripheral edge portion of the second plate-shaped portion.
The wire rope entanglement prevention jig according to claim 1. The connecting portion is configured so that the distance between the first plate-shaped portion and the second plate-shaped portion can be changed.
The wire rope entanglement prevention jig according to claim 9. A first window portion that can be opened and closed is formed in a part of the outer peripheral edge of the first insertion hole, and the first umbrella-shaped portion has a slit that communicates with the first window portion. It is provided,
A second window portion that can be opened and closed is formed in a part of the outer peripheral edge of the second insertion hole, and the second umbrella-shaped portion has a slit that communicates with the second window portion. It is provided,
The wire rope entanglement prevention jig according to claim 9. The wire rope entanglement prevention jig according to claim 9, wherein a wire rope guide roller is provided in the first insertion hole and the second insertion hole.