JP2019112167A - Hook storage container and wire replacement method - Google Patents

Abstract

To provide a hook storage structure which can store a hook from which a wire rope is removed and enables the wire to be replaced while storing the hook.SOLUTION: A hook storage structure is used to store a main hook 17M of a rough terrain crane. The hook storage structure includes: a pair of side plate members 21 disposed at left and right sides; a bottom plate member 23 disposed at the lower side; a front plate member 24 disposed at the front side; and a support member 25 which is disposed at the rear side and receives side surfaces of the main hook hung by the wire to adjust a direction of the main hook.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a hook storage container and a wire transfer method for storing a hook of a mobile crane.

  DESCRIPTION OF RELATED ART Conventionally, the hook storage device which stores the hook of a mobile crane is known so that it may not get in the way at the time of driving | running | working. As the hook storage device, a structure in which a hook is hooked on a mooring member attached to a vehicle body frame to be fixed in a pulled state is often employed. However, in such a structure, it is necessary to manually connect the hook and the mooring member, and there is a problem that the hook swings during traveling.

  Therefore, for example, in Patent Document 1, when the hook is stored such that the bracket is rotated by winding up the wire rope and is folded to the boom side, the hook is inserted into the hook storage hole installed at the front end of the vehicle body frame An arrangement is disclosed in which (the body of the) is adapted to enter. According to such a configuration, it is not necessary to fix the hook manually, and it is possible to prevent the hook from being shaken.

Japanese Utility Model Application Publication No. 5-69070

  By the way, in recent years, there has been a demand for mobile cranes that can be used easily and efficiently by a wide range of people from beginners to veterans. As an example, a mobile crane has been developed which has only one winch (one win). In that case, in order to use the main hook and the sub hook properly, it is necessary to change the wire rope.

  However, the hook storage device described in Patent Document 1 is configured to store the hook in a state in which the wire is attached to the hook. Therefore, it was not possible to accommodate the hook in a state in which the wire was removed, and it was not possible to replace the wire in a state in which the hook was further accommodated.

  Therefore, the present invention can accommodate a hook in a state in which the wire is removed, and a hook storage structure in which the wire can be switched in the state in which the hook is housed, and a wire replacement method using this hook storage structure. It is intended to be provided.

  In order to achieve the above object, the hook storage structure of the present invention comprises a pair of side plate members disposed on the left and right, a bottom plate member disposed below, a front plate member disposed forward, and a rear And a support member for aligning the direction of the hook by receiving the side surface of the hook suspended from a wire.

  A hook storing method according to the present invention is a wire retapping method using the hook storing structure described above, wherein the hook storing container stores the hook, and the hook storing container stores the hook. And rewiring the wire from the front of the hook storage container.

  Here, a hook storage container capable of accommodating a hook in a state in which the wire is removed according to the present invention excludes that a hook can be accommodated in a state in which the wire is not removed (that is, a state in which the wire is attached). is not. The mobile crane of the present invention can, of course, also travel with the hook attached to the wire housed in the hook storage container.

  Thus, the hook storage structure of the present invention is a hook storage container for storing a hook of a mobile crane, and includes a pair of side plate members disposed on the left and right, a bottom plate member disposed below, and a front. And a support member disposed at the rear, for aligning the direction of the hook by receiving the side surface of the hook suspended from the wire. With such a configuration, the hook can be accommodated in a state in which the wire is removed, and the wire can be switched in a state in which the hook is accommodated.

  Further, a method for rewiring a wire according to the present invention is a method for rewiring a wire using the hook storage structure described above, comprising the steps of storing the hook in the hook storage container and the hook storage with the hook stored in the hook storage container. Switching the wire from the front of the container. With such a configuration, the hook can be accommodated in a state in which the wire is removed, and the wire can be switched in a state in which the hook is accommodated.

It is a side view of a rough terrain crane. It is a perspective view explaining arrangement of a hook storage container. It is a perspective view of the hook storage container of the state which has not accommodated the hook. It is a top view of the hook storage container of the state which has not accommodated the hook. It is a front view of the hook storage container of the state which has not accommodated the hook. It is a perspective view which expands and shows a guidance member. It is a perspective view of the hook storage container of the state which accommodated the hook. It is a top view of the hook storage container of the state which accommodated the hook. It is a front view of the hook storage container of the state which accommodated the hook. It is an explanatory view explaining an operation of a support member at the time of storing a hook. It is an explanatory view explaining an operation of a guidance member at the time of storing a hook. It is an explanatory view explaining storage of a sub hook. It is an explanatory view explaining a wire changing method.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the component described in the following embodiment is an illustration, and it is not a thing of the meaning which limits the technical scope of this invention only to them.

(Constitution)
First, the whole structure of the rough terrain crane 1 as a mobile crane provided with the hook storage structure S of a present Example is demonstrated using FIG. Although the rough terrain crane 1 will be described as an example of the mobile crane in the following embodiment, the present invention is not limited thereto, and the present invention is widely applicable to other mobile cranes such as cargo cranes, truck cranes and all terrain cranes. The invention can be applied.

(Overall configuration of crane)
As shown in FIG. 1, the rough terrain crane 1 of this embodiment includes a vehicle body frame 10 as a main body of a vehicle having a traveling function, outriggers 11 provided at four corners of the vehicle body frame 10,. It has a swivel base 12 mounted on the frame 10 so as to be horizontally pivotable, and a boom 14 mounted on a swivel frame upper portion 13 of the swivel base 12. In the rough terrain crane 1 of this embodiment, the hook storage container 20 is disposed at the front end of the vehicle body frame 10 and below the boom 14 in the traveling posture. The configuration of the hook storage container 20 will be described later.

  The outrigger 11 can slide out / slide from the body frame 10 outward in the width direction by extending and retracting the slide cylinder, and can extend and retract the jack in the vertical direction from the body frame 10 by extending and retracting the jack cylinder. It is possible.

  The swivel base 12 has a pinion gear to which the power of the swiveling motor is transmitted. The pinion gear is engaged with a circular gear provided on the vehicle body frame 10 and pivots about the swivel axis. The swivel base 12 has a cab 18 disposed on the front right side, a pivot frame upper portion 13 disposed at the rear center, and a counterweight 19 disposed at the rear lower portion.

  The boom 14 is configured to be telescopically configured by a plurality of stages of boom components such as a base end boom 141, one or more intermediate booms 142, a tip boom 143, etc., and can be expanded and contracted by a telescopic cylinder disposed therein. It has become. A sheave (a pulley) is disposed at the tip end boom head 144 of the tip boom 143, and a wire rope 16 (hereinafter referred to as a wire 16) is wound around the sheave to suspend the main hook 17M. Further, although not shown, a sub hook (17S) is also mounted on the vehicle body frame 10 at a predetermined position.

  The end of the wire 16 is wound around a winch (not shown). Here, only one winch (not shown) is mounted on the rough terrain crane 1 of the present embodiment. That is, in the present embodiment, unlike the prior art, the wire 16 is commonly used for the sub hook (17S) and the main hook 17M. Therefore, depending on the situation of work, either the sub hook (17S) or the main hook 17M will be exchanged and used.

  The outermost base end boom 141 is pivotally attached at one end thereof to a support shaft horizontally installed in the upper portion 13 of the swing frame, and can be raised and lowered up and down about the support shaft. Further, a relief cylinder 15 is bridged between the swing frame upper portion 13 and the lower surface of the base end boom 141, and by extending and retracting the relief cylinder 15, the entire boom 14 can be made to be relief. There is.

(Configuration of hook storage structure)
Next, the configuration of the hook storage structure S will be described. The hook storage structure S is disposed below the vehicle body frame 10, the boom 14, the main hook 17M, the front end of the vehicle body frame 10 and the boom 14 in the traveling posture, as shown in the perspective view of the traveling posture in FIG. And a hook storage container 20. The hook storage container 20 is attached so as to project forward from the front side (front surface, front end surface) of the vehicle body frame 10. Furthermore, the hook storage container 20 is disposed below the boom 14 in the traveling posture, that is, at a position slightly leftward from the approximate center in the vehicle width direction in the vehicle width direction.

  The hook storage container 20 is configured to receive the main hook 17M in a state in which the wire 16 is removed. That is, the rough terrain crane 1 of the present embodiment mounts the sub hook (17S, not shown) and the main hook 17M as hooks. The sub hook (17S) is small and is used when the weight of the load is light. The main hook 17M is a large one and is used when the weight of the suspended load is heavy. The hook storage container 20 of the present embodiment is used to store the large-sized main hook 17M, and is a container formed to such a size as to just accommodate the main hook 17M.

  The hook storage container 20, as shown in FIGS. 3 to 5, is formed in a container-like or box-like shape in which the upper part is open as a whole. Furthermore, the hook storage container 20 is formed such that the cross-sectional area (opening) of the upper portion is wide and the cross-sectional area of the lower portion is narrow. As a result, the main hook 17M can be easily received from above, and rattling in a state in which the main hook 17M is completely accommodated is reduced.

  Specifically, the hook storage container 20 of the present embodiment includes a pair of side plate members 21 and 22 disposed on the left and right, a bottom plate member 23 disposed below, and a front plate member 24 disposed forward. And a support member 25 for aligning the direction of the main hook 17M by receiving the side surface of the main hook 17M disposed in the rear and suspended from the wire 16.

  As shown in FIGS. 3 to 5, the side plate members 21 and 22 are formed of two metal plates disposed opposite to each other, and the upper portion thereof is inclined so that the width is expanded upward. doing. Then, in each side plate member 21 (22), the wire detachment preventing pins 31 to 33 (preventing the wire 16 from being detached from the sheave) of the main hook 17M are removed so that the wire 16 can be easily replaced. In order to facilitate mounting, holes 21a and 21b (22a and 22b) are provided at positions corresponding to the positions of the wire detachment preventing pins 31 to 33 in a state in which the main hook 17M is completely housed. In addition, although the case where a "hole" ("hole" or "opening part") was formed in the position corresponding to the wire detachment prevention pins 31-33 was demonstrated in the present Example, it is not limited to this, It may be a slit or a notch.

  The bottom plate member 23 is formed of a square metal plate or the like disposed so as to cover the bottom portion of the hook storage container 20 as shown in FIGS. 3 to 5 so that the mince of the main hook 17M falls in the vicinity of the center. A guiding member 26 having a sloped surface for guiding the light guide is disposed (see FIG. 4). Here, the lower end of the main hook 17M is a hook-shaped portion, and can rotate about two axes perpendicular to the axis parallel to the side plate of the main hook 17M. It has become.

  When the main hook 17M is stored in the hook storage container 20, the guiding member 26 has an effect of orienting the mincing part and making it easy to fall down by the contact of the bottom part of the main hook 17M (see FIG. 11). . Specifically, as shown in FIG. 4 and FIG. 6, the guide member 26 guides the first guide member 26a to guide the hacker so as to bend backward (about an axis perpendicular to the side plate of the main hook 17M). And a second induction member 26b which guides the brush to twist and fall (around the axis parallel to the side plate of the main hook 17M) (to lie down or to follow the surface of the bottom plate member 23) Configured

  The first guiding member 26a is formed by bending a rectangular metal plate or the like into two, and has a sloped surface (see the white arrow in FIG. 6) facing rearward. The first guiding member 26 a is disposed along the center line of the bottom plate member 23 in the vehicle width direction so that the inclination direction of the inclined surface coincides with the longitudinal direction of the vehicle. On the other hand, the second induction member 26b is formed by bending a trapezoidal metal plate into two, and has an inclined surface (black in FIG. 6) directed to the side (in FIG. 6, to the right in the vehicle width direction). See arrow). The second guiding member 26 b is disposed slightly to the left in the vehicle width direction such that the inclined surface is on the center side in the vehicle width direction. Here, the case where the second guiding member 26b is disposed to the left in the vehicle width direction and the inclined surface is directed to the right has been described, but the second guiding member 26b is disposed to the right and the inclined surface is It may be configured to turn to the left.

  As shown in FIGS. 3 to 5, the front plate member 24 is formed of a U-shaped metal plate or the like, and a notch 24 a is formed between the U-shaped members. As described above, since the gap on the main hook 17M falls over, the gap is formed above the blade and below the sheave, so it is easy to pass the cable end from the front of the hook storage container 20 through the notch 24a. This makes it easy to carry out work such as changing the wire 16.

  The support member 25 is formed by bending a metal plate or the like so as to have a trapezoidal cross section, as shown in FIGS. The support members 25 are disposed in parallel along the front end edge of the upper portion of the vehicle body frame 10. That is, when the main hook 17M is stored, the two side plates of the main hook 17M gradually lowered from above come into contact with the support members 25 arranged in parallel with the corner portions of the vehicle body frame 10. ing. As a result, the direction of the main hook 17M is corrected such that the side plate of the main hook 17M is oriented along the longitudinal direction of the vehicle (see FIG. 10).

  Next, the configuration of a state in which the main hook 17M is stored will be described using FIGS. 7 to 9. In the state of being stored in the hook storage container 20, the main hook 17M is held upright as in the state suspended by the wire 16. Furthermore, the main hook 17M is accommodated in the hook storage container 20 with almost no gap, so that it is possible to prevent dropping off or damage due to vibration during traveling. In addition, since the hacker part of the main hook 17M is twisted and turned sideways while turning backward, as shown in FIG. 9, the upper part of the hacker part and the lower part of the sheave become accessible from the front. A space 27 is formed.

(Hook storage method)
Next, a method of storing the main hook 17M using the hook storage structure S will be described with reference to FIGS. 10 and 11. First, the action of the support member 25 will be described with reference to FIGS. 10 (a) and 10 (b). First, with the wire 16 attached to the main hook 17M, the boom 14 is pivoted and / or undulated and / or expanded to move the main hook 17M above the hook storage container 20. For example, at the end of the work, the main hook 17M is positioned above the hook storage container 20 by pivoting the boom 14 to the rotational position in the traveling posture, reducing the boom 14, and raising and lowering the boom 14. Let At the start of the operation, the main hook 17M is positioned above the hook storage container 20 by raising the boom 14 from the traveling posture while using the winch lowering operation together.

  Next, the wire 16 is further fed out from the winch (not shown), and the main hook 17M is accommodated inside the hook storage container 20. At this time, as shown in FIGS. 10A and 10B, the rotation of the main hook 17M is corrected by the support member 25. That is, when the wire 16 is drawn out and the main hook 17M becomes as high as the hook storage container 20, one of the side plates of the main hook 17M contacts the support member 25 (see FIG. 10A). In this state, when the boom 14 is raised by a small amount and the main hook 17M is pulled toward the vehicle body frame 10 side, the main hook 17M rotates by its own weight and both side plates contact the support member 25 (see FIG. 10B) ). Thus, the rotation of the main hook 17M is corrected.

  Then, when the wire 16 is further fed out, the bottom hatching portion of the main hook 17M contacts the bottom plate member 23 of the hook storage container 20. Here, the action of the guide member 26 will be described with reference to FIGS. 11 (a), (b) and (c). That is, the lowermost part of the minty part contacts the first guiding member 26 a disposed on the bottom plate member 23. Then, by the inclined surface directed to the rear of the first guiding member 26a, the hacker portion is pivoted to bend rearward around an axis perpendicular to the side plate of the main hook 17M (Figs. 11 (a) to ( c) see

  At the same time, the lowermost part of the mince comes in contact with the second guiding member 26 b installed on the bottom plate member 23. Then, with the inclined surface directed to the right of the second induction member 26b, the hacker portion twists (falls or falls on the bottom plate member 23) about an axis parallel to the side plate of the main hook 17M. It rotates so that a surface may be followed (refer FIG.11 (a)-(c)). As a result, as shown in FIG. 9, a space 27 is formed above the mince of the main hook 17M and below the sheave. Then, the cable end of the wire 16 can be passed through the space 27.

  Next, in a state in which the wire 16 is attached to the main hook 17M, while the wire 16 is wound up, the boom 14 is laid down to be in a traveling posture. Then, the distance between the boom head 144 and the main hook 17M approaches and the position of the boom head 144 is lowered, which makes it easy for a worker standing on the ground to perform work such as rewiring a wire. Finally, the hook storing operation is completed by hooking a main hook fixing chain (not shown) so that the main hook 17M does not come off the hook storage container 20. After this, if necessary, the wire 16 is removed from the main hook 17M and attached to the sub hook (17S).

(Wire replacement method)
Next, with reference to FIG. 12 and FIG. 13, a method for rewiring a wire using the hook storage structure S will be described. In the following, the procedure for changing the sub hook 17S to the main hook 17M will be described. In addition, about the change procedure from the main hook 17M to the sub hook 17S, since it is the reverse of the following procedure in general, description is abbreviate | omitted.

  The main hook 17M is stored in advance in the hook storage container 20 by, for example, the hook storage method described above. Thereafter, as described below, the wire 16 is removed from the sub hook 17S and hooked to the main hook 17M.

  That is, first, the boom 14 is pivoted and / or undulated and / or contracted to move the sub hook 17S suspended from the wire 16 above the sub hook storage recess 42 disposed on the vehicle body frame 10. Then, as shown in FIG. 12A, the operator or the assistant holds the sub hook 17S (hand-handling portion) by hand and hooks it on the sub hook retainer 41. Next, as shown in FIG. 12B, the sub hook 17S is stored in the sub hook storage recess 42 by tilting the boom 14 forward. Thereafter, after the bands 43, 43 are hung and fixed on the sub hook 17S, the rope socket is removed from the sub hook 17S, and the storage of the sub hook 17S is completed.

  Next, remove the main hook fixing chain hooked on the main hook 17M. Furthermore, the wire detachment preventing pins 31 to 33 are removed from the main hook 17M through the holes 21a, 21b, 22a, 22b provided in the side plate members 21, 22. Thereafter, as shown in FIG. 13, the wire 16 is passed through the main hook 17M while the worker stands on the ground. That is, the wire 16 is looped between the sheave of the boom head 144 and the sheave of the main hook 17M. And in this case, the wire 16 can be wound around the sheave from the front of the main hook 17M through the notch 24a of the front plate member 24 of the hook storage container 20 in this case. .

  When the wire 16 is finished, the wire detachment preventing pins 31 to 33 are attached to the main hook 17M through the holes 21a, 21b, 22a, 22b provided in the side plate members 21, 22. After that, while raising the boom 14, while simultaneously using the winch lowering operation, the boom 14 is raised to a position where the main hook 17M can be pulled up directly. That is, the boom head 144 is moved immediately above the hook storage container 20 while the wire 16 is drawn out. Finally, the main hook 17M is pulled up from the hook storage container 20 (storage position) by the winch winding operation, and the wire reassigning operation is completed.

(effect)
Next, the effects of the hook storage structure S of this embodiment will be listed and described.

(1) As described above, the hook storage structure S of this embodiment is the hook storage structure S for storing the main hook 17M as the hook of the rough terrain crane 1 as the mobile crane, The pair of side plate members 21 and 22 disposed, the bottom plate member 23 disposed below, the front plate member 24 disposed forward, and the main hook 17M disposed behind and suspended from the wire 16 And a support member 25 for aligning the direction of the main hook 17M by receiving the side surface of the main hook 17M. With such a configuration, the main hook 17M in a state in which the wire 16 is removed can be accommodated, and the wire 16 can be switched in a state in which the main hook 17M is accommodated in the hook storage container 20. Furthermore, since the support member 25 is provided, the direction of the main hook 17M is automatically corrected even if the assistant does not press the hand to rotate the main hook 17M. Then, the operator can store the main hook 17M in the hook storage container 20 semi-automatically by being in the cab 18 and operating the work machine.

(2) Further, since the bottom plate member 23 has the guiding member 26 provided with the inclined surface for guiding the mince of the main hook 17M to fall down, the work of removing and switching the wire 16 is facilitated. That is, in the state of being stored in the hook storage container 20, since the seal portion of the main hook 17M falls down, the space 27 is formed above the seal portion and below the sheave. Therefore, the use of the space 27 facilitates the attachment / removal operation of the cable end and the winding operation of the wire 16.

  Furthermore, since the height of the entire hook storage container 20 containing the main hook 17M can be suppressed by thus lowering the minty part, the minimum ground height and approach angle of the vehicle by mounting the hook storage container 20. Impact on the environment can be minimized. In particular, in a mobile crane equipped with a slant boom that lowers the boom front end side, there is a restriction on the boom 14 and the body frame 10 and the approach angle, and the advantage of being able to accommodate the main hook 17M compactly by tilting the hacker part is great.

(3) Further, the front plate member 24 is provided with a notch 24a through which the wire 16 passes when the main hook 17M is replaced with the wire 16. For this reason, the space 27 can be accessed from the front through the notch 24a, which facilitates the attachment / removal operation of the cable end and the winding operation of the wire 16.

(4) The side plate members 21 and 22 are provided with holes 21a, 21b, 22a and 22b for attaching / removing the wire detachment preventing pins 31 to 33 of the main hook 17M. For this reason, in the state which accommodated the main hook 17M in the hook storage container 20, the wire removal prevention pins 31-33 can be removed.

(5) Further, the hook storage container 20 is disposed at the front end of the vehicle body frame 10 and below the boom 14 in the traveling posture. According to such a configuration, the main hook 17M in a state in which the wire 16 is removed can be stored by the minimum swing, upswing, and extension operation of the boom 14.

(6) And, the wire changing method according to the present embodiment is a wire changing method using any of the above-described hook storage containers 20, which comprises the steps of storing the main hooks 17M in the hook storage containers 20; And a step of replacing the wire 16 from the front of the hook storage container 20 in a state in which the main hook 17M is stored at 20. With such a configuration, the main hook 17M in a state in which the wire 16 is removed can be accommodated, and the wire 16 can be switched in a state in which the main hook 17M is accommodated in the hook storage container 20.

  Although the embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes to the extent not departing from the scope of the present invention are included in the present invention. included.

  For example, although the embodiment describes the case where the main hook 17M is accommodated in the hook storage container 20 as a hook, the present invention is not limited to this, and not only the main hook 17M as a hook but also other types of hooks You can also For example, in a vehicle equipped with only one type of hook as the hook, it is also possible to accommodate the hook.

1: Rough terrain crane (mobile crane);
10: Body frame; 14: Boom; 144: Boom head;
16: Wire; 17M: Main hook;
20: Hook Containment;
21, 22: side plate member; 23: bottom plate member; 24: front plate member;
25: support member;
26: induction member: 26a: first induction member; 26b: second induction member;
27: Space

Claims (6)

A hook containment vessel for storing a hook of a mobile crane,
A pair of side plate members disposed on the left and right,
A bottom plate member disposed below,
A front plate member disposed forwardly,
And a support member disposed at the rear and adapted to align the direction of the hook by receiving the side surface of the hook suspended from a wire.   The hook storage container according to claim 1, wherein the bottom plate member has a guiding member provided with an inclined surface for guiding a hook portion of the hook to fall down.   The hook storage container according to claim 1 or 2, wherein the front plate member is provided with a notch through which the wire passes when the wire is switched to the hook.   The hook storage container according to any one of claims 1 to 3, wherein the side plate member is provided with a hole for attaching / removing the wire detachment preventing pin of the hook.   The hook storage container according to any one of claims 1 to 4, wherein the hook storage container is disposed at a front end of the vehicle body frame and below a boom in a traveling posture. A wire replacement method using the hook storage container according to any one of claims 1 to 5, comprising:
Storing the hook in the hook storage container;
A step of changing the wire from the front of the hook storage container in a state where the hook is stored in the hook storage container.