JP4116360B2 - Crane hook storage device - Google Patents

Description

[0001]
The present invention selectively uses a crane hook storage device, particularly a normal crane operation in which a plurality of hooks are hung at the tip of a boom and a single-line operation in which a single hook is hung at the tip of a boom. The present invention relates to a hook storage device for a crane that can be used.
[0002]
[Prior art]
An example of a crane that hangs a hook on the tip of a telescopic boom and performs crane work is an example of an on-board crane that is mounted at the position behind the cab of a vehicle and is mainly used for loading and unloading loads on a loading platform etc. explain.
[0003]
In FIG. 3, A is a vehicle-mounted crane. The in-vehicle crane A includes a base 2 having left and right outrigger devices 1a and 1b mounted at a position behind a cab of a vehicle (not shown), and a swivel post 3 that is rotatably mounted on the base 2. A telescopic boom 4 pivotably supported on the upper part of the swivel post 3 and having telescoping booms 4b and 4c inserted into the base end boom 4a in a telescopic manner; A hook 8 (in this embodiment, a wire rope 7) is supported by a wire rope 7 that is pivotally supported by the shaft 5 and the sheave shaft 5 and is fed from a winch device 6 that is attached to the base end of the pivot post 3 or the telescopic boom 4. And a plurality of hooks (a plurality of hooks hooked around a plurality of hooks). Reference numeral 10 denotes a hoisting cylinder that drives the telescopic boom 4 to hoist.
[0004]
The vehicle-mounted crane A configured in this manner first installs the left and right outrigger devices 1a and 1b to stably support the crane, and in this state, loads the load on the hook 8 and drives the swivel post 3 to swivel. The telescopic boom 4 is driven up and down and telescopically driven, and the winch device 6 is driven up and down to raise and lower the hook 8 to an arbitrary position to load and unload cargo.
[0005]
On the other hand, in this type of in-vehicle crane A, the hook 8 is used to prevent the boom tip 4d and peripheral devices from being damaged by swinging of the hook 8 suspended from the boom tip 4d during vehicle travel. A hook storage device 11 for storing in a hook storage position B along the lower surface is attached. As shown in FIG. 4, the hook storage device 11 is located near the front end of the lower end of the link mounting bracket 12 that is detachably attached to the boom tip portion 4 d and in the state where the hook 8 is suspended from the tip sheave 9. A pivot hole 13 provided at a position deviated by a predetermined amount S0 from the longitudinal center O0 (hereinafter referred to as the suspension center O0) of the plurality of wire ropes 7 suspended from the boom to the boom tip side, and an upper end 14a. The hook is pivoted to the base end side of the boom by further hoisting movement after the upper surface of the hook 8 comes into contact with the hook abutting portion 15 pivotally supported by the support hole 13 and provided at the lower end 14b. 8 and a hook storage link 14 for storing and holding 8 at a hook storage position B along the lower surface of the boom. The hook storage device 11 configured as described above is configured to drive the hoist 8 up when the crane operation is finished and travels (in a vehicle-mounted crane equipped with a hook overwinding stop mechanism, the hook overwinding stop mechanism). Is released and the hoisting drive is performed), the hook 8 comes into contact with the hook contact portion 15 of the hook storage link 14 (shown by the solid line in FIG. 4). At the same time, the hook 8 swings to the base end side of the boom, and the hook 8 is automatically stored and held at the hook storage position B (shown in FIG. 4 along the chain line) along the bottom surface of the boom. As described above, the conventional hook storage device 11 can store the hook 8 in the hook storage position B along the lower surface of the boom only by the hoisting drive of the hook 8, and greatly contributes to improvement in workability during crane storage work. Met.
[0006]
On the other hand, this type of vehicle-mounted crane A is sometimes used for wood accumulation work for accumulating timber harvested in a mountain forest or the like. In this wood accumulation work, the operator moves to a place where the felled timber scattered on the sloping ground with a hook, engages the hook with the wood and drives the winch device 6 to accumulate the wood. It was like that. This work requires a heavy load hook to move the sloping ground to the position where the wood is located, which places a heavy burden on the worker. For this reason, the hook is used for general work in order to reduce the burden on the worker. The work was carried out by replacing the multiple hooks with a lighter one hook (indicated by the one-dot chain line in FIG. 3). This hook replacement operation is performed by removing the rope end 7a of the wire rope 7 from the boom tip 4d and removing the wire rope 7 that is hung on the multiple hooks 8 (removing the multiple hooks 8). The main hook is engaged with the rope end 7a of the wire rope 7.
[0007]
[Problems to be solved by the invention]
However, since this single hook is greatly different from the shape of the multiple hooks 8 for general work, the conventional hook storage link 14 for the multiple hooks 8 can be engaged well with the hook contact portion 15. Therefore, the hook could not be stored stably. For this reason, conventionally, a separate hook storage link for a single hook is prepared, and the hook storage link is also replaced with a dedicated one at the same time as the hook replacement. Therefore, the replacement work is complicated and the workability is poor. There was a problem. In addition, it is advantageous to obtain a stable operation when the swing fulcrum of the hook storage link is provided at a position that is not so far away from the hanging center of the hook. However, the hanging center of the single hanging hook has multiple hanging hooks. There has been a problem in pivoting the multiple hook storage link and the single hook storage link using a single pivot support hole, which is greatly displaced in the boom longitudinal direction from the suspension center.
[0008]
The present invention has been made in view of the above-mentioned problems, and it is possible to easily replace a plurality of hook hook storage links and one hook hook storage links so as to improve workability. It is an object of the present invention to provide a hook storage device for a crane in which a single hook storage link can be attached by a simple operation without application.
[0009]
[Means for Solving the Problems]
The present invention has the following configuration as means for solving the above problems.
[0010]
In other words, the crane hook storage device according to claim 1 of the present invention is provided with a plurality of hooks and one hook by means of a wire rope that is rotatably supported on a sheave shaft provided at the boom tip of the telescopic boom and is fed from a winch device. A tip sheave that can hang the hanging hook in an interchangeable manner, and is attached to the tip of the boom in a detachable manner. In the state where a plurality of hanging hooks are suspended on the tip sheave, the hook is biased toward the boom tip side from the hook center. A link in which a first pivot hole is provided at a position, and a second pivot hole is provided at a position offset from the suspension center of the hook toward the tip of the boom in a state where one hook is suspended from the tip sheave. The mounting bracket is pivotally supported at the upper end thereof in a swingable manner in the first pivotal support hole, and the hook hook is brought into contact with a hook abutting portion provided at the lower end. Multi-hook hook storage link that swings toward the base end side and stores and holds the hook in the hook storage position along the bottom surface of the boom. The upper end is pivotally supported by the second pivot hole and is provided at the lower end. One hook hook that swings toward the base end side of the boom by further hoisting movement after the one hook hook comes into contact with the hook contact portion and stores the hook in the hook storage position along the bottom surface of the boom. The storage link and the multiple hook hook storage link and the single hook hook storage link provided at the tip of the boom are engaged with the unused link and the link is retracted out of the lifting locus of the hook. It is comprised with the link latching tool latched to a use position.
[0011]
The hook storage device configured as described above is provided with a plurality of hook hook storage links for storing a plurality of hook hooks and a single hook hook storage link for storing one hook hooks in a link mounting bracket attached to the tip of the boom. To the end of the boom, and engages the unused link of the multiple hook storage link and the single hook storage link to the unused position where the link is retracted out of the hook lifting locus. Since it is provided with a link locking tool for locking, for example, when replacing a hook from a multiple hook to a single hook and performing a single hook operation, the unused multiple hook storage link is linked to the link hook. If it is locked with a stopper and retracted to the outside of the lifting / lowering locus of the hook (non-use position), even if one hook hook is rolled up to the storage position, multiple hook hook storage links Not abut, it is the hook retracting operation can be prevented by this because incorrect combination. On the other hand, since the one-hook hook storage link corresponding to the one-hook hook in operation is suspended in the lifting locus of the single-hook hook, if the single-hook hook is wound up to the storage position, the hook is The hook is brought into contact with the hook contact portion, and the hook storage link swings together with the hook toward the base end side of the boom by the further hook hoisting movement, and is stored in the hook storage position along the lower surface of the boom. Also, when exchanging a hook from a single hook to multiple hooks and performing normal crane work, lock the unused single hook hook storage link with a link locker to move the hook up and down. If retracted to the (non-use position), a plurality of hooks can be stored in the hook storage position by a plurality of hook hook storage links as in the conventional case. As described above, when replacing the multiple hook storage link and the single hook storage link, the hook storage link on the side that is not used is simply connected to the outside of the lifting / lowering locus of the hook (non-use position) using the link latch. Therefore, the replacement work is simplified and the workability is improved.
[0012]
In addition, since the link mounting bracket that pivotally supports the hook storage link is detachably attached to the tip of the boom, the conventional link mounting bracket is removed and the multiple hook storage link and the single hook are removed. It can be easily replaced with a link mounting bracket equipped with two links of the storage link. For this reason, even with an existing crane, it is possible to easily attach the one-hook hook storage link by simply exchanging the link mounting bracket without performing a large modification work.
[0013]
The hook storage device according to claim 2 is configured so that the single hook storage link can be removed from the second pivot hole. For this reason, when a single hook storage link does not work for a long period of time and the single hook hook storage link obstructs the work, etc., the single hook storage link is removed and a plurality of hooks are removed. It is possible to perform crane work with a hook. In this case, there is no one-hook hook storage link in the locked state at the boom tip, and work can be performed without interfering with peripheral members when crane work is performed by inserting the boom tip into a narrow space. It becomes.
[0014]
According to a third aspect of the present invention, in the hook storage device, the hook abutting portion of the single hook hook storage link supports the both side positions of the wire rope on which the single hook is suspended so as to roll freely, and is lateral to the tip sheave. A pair of horizontal pulling guide sheaves for guiding the wire rope drawn from obliquely below along the sheave surface is attached. For this reason, when exchanging a hook with a single hook and performing a wood accumulation operation, etc., even if the wire rope is pulled in from the obliquely lower side with respect to the tip sheave, the horizontal pulling guide sheave sheaves the wire rope. Since the guide is guided so as to be drawn along the surface, the wire rope is prevented from deviating from the tip sheave, and stable wood accumulation work is possible.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to FIGS. 1 and 2. The hook storage device of the present invention is obtained by adding a single hook storage link and a link latch to the hook storage device described as the prior art based on FIG. 4, and this difference will be described in the following description. It shall be explained mainly. For this reason, each code | symbol of 1-11 demonstrated as a prior art shall be used as a synonym also in the following description.
[0016]
In FIG. 1, 16 is a link mounting bracket that is detachably mounted on the boom tip 4d. The link mounting bracket 16 sets the extension amount of the lower end extending portion 17 to be larger than that of the conventional link mounting bracket 12, and the second pivot support hole 22 is provided in the lower end extending portion 17. . Further, a boss 18 that is externally supported by the sheave shaft 5 is provided at the center of the link mounting bracket 16, and the link mounting bracket 16 can be easily removed by removing the sheave shaft 5 from the boom tip 4d. It is like that. Reference numeral 19 denotes a detent that prevents the link mounting bracket 16 from rotating around the sheave shaft 5. According to the mounting method of the link mounting bracket 16 configured as described above, the link mounting bracket 16 can be easily replaced by removing the sheave shaft 5 from the boom tip portion 4d. In addition, the link mounting bracket 16 can be easily replaced without any major remodeling work.
[0017]
Reference numeral 20 denotes a first pivot hole provided in the lower end extending portion 17 of the link mounting bracket 16. The first pivot hole 20 is located at the same position as the conventional pivot hole 13, that is, when the plurality of hooks 8 are suspended from the tip sheave 9 as shown in FIG. (Center in the longitudinal direction of a plurality of wire ropes 7 from which a plurality of hooks 8 are suspended) It is provided at a position deviated toward the boom tip side by a certain length S1 from O1. Similarly, 22 is a second pivot hole provided in the lower end extending portion 17. The second pivotal support hole 22 is a single wire in which the hook 23 is suspended in the state where the single hook 23 is suspended from the end sheave 9 as shown in FIG. The center of the rope 7) is provided at a position deviated toward the boom tip side by a certain length S2 from O2.
[0018]
The upper end 24a is pivotally supported by the first pivotal support hole 20 so that the upper portion 24a is swingably supported. The lower end 24b is a hook contact that abuts the upper engagement surface 8a of the multiple hooks 8 suspended from the tip sheave 9. This is a multiple hook hook storage link provided with a contact portion 25. Similarly to the conventional hook storage link 14, the multi-hook hook storage link 24 is configured such that if the hook 8 is wound up beyond the upper limit position for storing the multi-hook hook 8, the hook 8 is hooked. The hook storage link 24 is brought into contact with the contact portion 25, and the hook storage link 24 swings in the boom proximal direction together with the hook 8 by further hook winding movement so that the hook 8 is stored in the hook storage position B1 along the lower surface of the boom. It has become. Reference numeral 26 denotes a guide device attached to the lower end of the hook storage link 24, and is loosely fitted to the wire rope 7 for hanging the hook so that the relative position between the hook contact portion 25 and the upper engagement surface 8a at the time of hook contact. The relationship is maintained constant, and the hook 8 and the hook storage link 24 are guided so as to be surely engaged.
[0019]
27, the upper 27a is pivotally supported by the second pivot hole 22 so as to be swingable, and the lower end 27b is a hook contact that abuts the upper engagement surface 23a of the single hook 23 suspended from the tip sheave 9. This is a single hook storage link provided with a contact portion 28. If the hook 23 is rolled up beyond the hoisting upper limit position in order to store the single hook 23, the hook 23 comes into contact with the hook contact portion 28, and further hooks are stored. The hook storage link 27 swings in the boom proximal direction together with the hook 23 by the hoisting movement, and the hook 23 is stored in the hook storage position B2 along the lower surface of the boom. Further, the upper frame 28a of the hook contact portion 28 supports the both side positions of the wire rope 7 drawn from the tip sheave 9 and suspending the single hook 23 so as to roll freely. On the other hand, a pair of horizontal pulling guide sheaves 29 and 30 for guiding the wire rope 7 drawn in from the obliquely lower side along the sheave surface are attached. For this reason, when performing a stacking operation of wood using the single hook 23, the so-called lateral pulling state in which the wire rope 7 is pulled from the side obliquely below the sheave surface of the tip sheave 9 depending on the position of the wood to be pulled in. In this case as well, the horizontal pulling guide sheaves 29 and 30 attached to the upper frame 28a of the hook contact portion 28 guide the wire rope 7 to be drawn along the sheave surface. Is prevented from deviating from the sheave groove of the tip sheave 9, and a stable wood accumulation operation is possible. Further, the one-hook hook storage link 27 is configured to be removable from the second pivot support hole 22 by removing the pivot shaft. For this reason, when the one-hook hook storage link 27 does not perform the single-hang work using the one-hook hook 23 over a long period of time, and the one-hook hook storage link 27 interferes with the work, the one-hook hook storage link 27 is used. It can be removed and crane work is possible.
[0020]
31 is a link locking tool attached to the boom tip 4d. The link locking tool 31 is used by selectively engaging with a locking hook 32 provided on the multiple hook storage link 24 and a locking hook 33 provided on the single hook storage link 27. The hook storage links 24, 27 on the non-side are configured to be locked at a non-use position where the hook storage links 24, 27 are retracted out of the lifting locus of the hooks 8, 23. The link locking device 31 configured as described above is used when the multiple hook hook storage link 24 is not used when, for example, the hook is replaced with the single hook 23 from the multiple hook 8 to perform the single hook operation. If the locking hook 32 is locked to the link locking tool 31 and retracted outside the lifting / lowering locus of the hook 23 (non-use position), even if the single hook 23 is wound up to the retracted position, it remains within the lifting locus. The hook abutment portion 25 of the hook storage link 24 is not positioned, and accordingly, inappropriate hook storage of the single hook 23 by the multiple hook storage link 24 can be prevented. On the other hand, the one-hook hook storage link 27 corresponding to the one-hook hook 23 in operation is suspended in the up-and-down trajectory of the hook 23. Therefore, when the hook 23 is wound up to the storage position, the hook 23 is hooked. The hook storage link 27 swings to the boom base end side together with the hook 23 and is stored in the hook storage position B2 along the lower surface of the boom by the contact with the contact portion 28 and further hook hoisting movement. Note that when normal crane work is performed by replacing one hook 23 with a plurality of hooks 8, the hook 33 of the single hook hook link 27 that is not used is reversed. If the hooks are locked to the tool 31 and retracted out of the lifting / lowering trajectory of the hooks 8 (non-use position), the plural hooks 8 can be stored similarly using the plural hook hook storage links 24. As described above, when replacing the multiple hook storage link 24 and the single hook storage link 27, the hook storage links 24, 27 on the unused side are locked to the link lock 31 and the hook is not moved up and down. The hook storage links 24 and 27 can be easily replaced and the workability can be improved.
[0021]
【The invention's effect】
The crane hook storage device of the present invention configured as described above has a plurality of hook hook storage links and a single hook storage link attached to a link mounting bracket attached to the tip of the boom. Because the link on the unused side can be locked at the unused position retracted out of the lifting / lowering locus of the hook with the link locking tool provided at the end of the boom, the hook storage link replacement work is not used It is only necessary to lock and fix the hook storage link outside the lifting locus of the hook with a link locking tool, so that the replacement operation of the hook storage link is simplified and the workability is improved. In addition, since the link mounting bracket with multiple hook hook storage links and one hook hook storage link is detachably attached to the tip of the boom, even if it is an existing crane, only the link mounting bracket is replaced. Thus, a single hook storage link can be easily attached without carrying out a large remodeling work.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an explanatory diagram of a crane hook storage device during a single hanger operation of the present invention, in which a is a side view and b is a front view.
FIGS. 2A and 2B are explanatory views of a hook storage device for a crane at the time of a plurality of hanging work, wherein a is a side view and b is a front view.
FIG. 3 is an explanatory diagram of an on-vehicle crane.
FIG. 4 is an explanatory diagram of a conventional hook storage device.
[Explanation of symbols]
A vehicle-mounted crane,
1a, 1b Outrigger device,
2 bases,
3 swivel post,
4 telescopic boom,
4d boom tip,
5 Sheave shaft,
6 winch device,
7 Wire rope,
8 Multiple hooks,
9 Tip sheave,
10 undulating cylinder,
11 Hook enclosure,
12, 16 link mounting bracket,
13 pivot hole,
14 hook storage link,
15 Hook contact part,
20 First pivot hole,
22 Second pivot hole,
23 One hook,
24 Multi-hook hook storage link,
25 Hook contact area,
27 One-hook hook storage link,
28 Hook contact area,
29, 30 Horizontal guide sheave,
31 Link fastener,

Claims (3)

A tip sheave and a boom tip that can exchange a plurality of hooks and a single hook by a wire rope that is rotatably supported by a sheave shaft provided at the boom tip of the telescopic boom and exchanged from a winch device. In a state where a plurality of hooks are suspended on the tip sheave, the first pivot hole is hooked on the tip sheave at a position offset from the suspension center of the hook toward the boom tip side. In the state where the hook is suspended, link mounting brackets each provided with a second pivot hole at a position offset from the suspension center of the hook toward the boom tip side, and the upper end is swingable to the first pivot hole. A hook storage position along the bottom surface of the boom by pivoting to the base side of the boom by further hoisting movement after the plurality of hooks abut on the hook abutting portion provided at the lower end of the boom. Multiple hook hook storage link for storing and holding, further lifting of the hook after the upper hook is pivotally supported in the second pivot hole and the hook hook is in contact with the hook contact portion provided at the lower end. Swinging toward the base end side of the boom by movement, and storing and holding the hook at the hook storing position along the bottom surface of the boom, and the multiple hook hook storing link provided at the tip of the boom. A crane engaging with a link on the side of the hook storing link that is not used and locking the link at a non-use position where the link is retracted out of the lifting locus of the hook. Hook storage device. The crane hook storage device according to claim 1, wherein the single hook storage link is configured to be detachable from the second pivot hole. A wire rope that is supported on the hook abutting portion of the one-hook hook storage link so as to be able to roll on both sides of the wire rope that suspends the one-hook hook and that is pulled in from the obliquely lower side with respect to the tip sheave. The crane hook storage device according to claim 1 or 2, wherein a pair of laterally pulling guide sheaves for guiding the shaft along the sheave surface are attached.

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