JPH04341497A - Device for supporting hook engaging ring of hook block in crane car - Google Patents

Abstract

PURPOSE:To prevent careless interference of an engaging ring and a corrugated part of the upper surface of a car body base by providing an engaging ring for engaging a hook of a crane car rotatably about a horizontal axis of the end of its swivel body, and also by providing a curved portion for supporting the engaging portions of the afore-mentioned engaging ring horizontally. CONSTITUTION:On the end face 3A of the swivel body 3 of a crane car, the engage ring 13 for engaging the hook of a hook block is provided rotatably about a horizontal axis, and also a curved part 13b is provided for supporting the engaging part 13a of the afore-mentioned engage ring 13 horizontally at all times.

Description

[Detailed description of the invention]

0001

[Industrial Field of Application] This invention relates to a hook locking ring support device for a hook block in a crane vehicle, and in particular to a boom of a telescoping boom that is movably provided on a revolving body of a crane vehicle. The hook of the hook block suspended from the swing body via a wire rope can be locked to a locking ring rotatably provided around a horizontal axis on the end face of the revolving body. This invention relates to a locking ring support device for a hook of a hook block in a vehicle.

0002

[Prior Art] A hook of a hook block suspended via a wire rope from a telescopic boom that is movable on the revolving body of a conventional crane vehicle is locked to the revolving body. The locking device may be, for example, a locking device that is suspended from the boom head of the telescopic boom of the crane vehicle via a wire rope, from a bracket provided on the circumferential surface of the revolving body of the crane vehicle. There is a hook block in which the hook of the hook block is locked directly or via a sling wire to a locking ring rotatably provided on the end surface of the revolving body.

[0003] In this device, prior to cargo handling work using the hooks of the hook block suspended from the telescoping boom of the crane vehicle via the wire rope, the hooks of the hook block are attached to the revolving structure. After removing the locking ring from the end surface, the locking ring is fixed to a locking block on the revolving structure so as to be separated from the upper surface of the vehicle body base, and the locking ring is moved in a predetermined direction. The locking ring that releases the engagement of the hook interferes with the irregularities on the upper surface of the car body base during cargo handling operations including turning the revolving structure by the crane truck. This is what prevented it.

0004

[Problems to be Solved by the Invention] In the conventional hook locking device for a crane vehicle as described above, it is difficult to attach the telescopic boom of the crane vehicle, and thus the telescopic boom. Prior to cargo handling work by rotating the revolving structure, the hook of the hook block suspended from the boom head of the telescoping boom via a wire rope is removed from the locking ring, and then the same locking is performed. If you forget to hang the ring on the locking block and start cargo handling, the locking ring will rotate around the spindle and hang down, causing the lower end (end) of the locking ring to hang over the uneven surface of the vehicle base. There is a risk of interfering with the rotating body and preventing the rotation of the rotating body, or causing damage to the locking ring, and
Both the locking and disconnection of the hook of the hook block to and from the locking ring were performed manually, which was time-consuming and troublesome.

[0005] The present invention has been made by paying attention to the problems in the conventional example, and includes a structure in which the boom head of the telescopic boom on the revolving body of the crane vehicle is connected to the end face of the revolving body of the crane vehicle.
A locking ring that locks the hook of a hook block suspended via a wire rope is rotatably supported around a horizontal axis, and the locking portion of the locking ring is connected to the upper surface of the vehicle body base. The locking part of the locking ring is always pressed by the pressure means so as to face upward around the horizontal axis, while the locking part of the locking ring is An object of the present invention is to provide a hook locking ring support device for a hook block in a crane vehicle that can solve the above-mentioned problems by supporting the stop portion so as to be movable from its normal support position against the pressure means. It is something.

[0006]

[Means for Solving the Problems] In order to solve the above-mentioned problems of the conventional example, the present invention has been made to provide the following advantages: A locking ring that locks the hook of a hook block suspended via a wire rope is rotatable around a horizontal axis of the end surface of the revolving body, and the end of the locking portion of the locking ring is The wire rope is supported by a support means so as not to interfere with the upper surface of the vehicle body base, and the wire rope is connected to the boom head of the telescoping boom that is movable on the revolving body of the crane vehicle. A locking ring that locks the hook of the hook block suspended through the rotating body is provided so as to be rotatable around the horizontal axis of the end surface of the revolving body, and the locking portion of the locking ring with the hook is compressed by elastic pressure. The locking ring is always pressed upwardly around its horizontal axis by a means, and the locking portion of the locking ring is supported so as to be displaceable from its normal supporting position against the pressure means.

(Operation) The present invention has the above configuration,
In particular, a locking ring is rotatably supported around a horizontal axis on an end surface of a revolving body of a crane vehicle, and the locking portion of the locking ring with the hook is always maintained such that its end portion is body base
The locking part of the locking ring is always pressed upwardly around the horizontal axis by the pressing means, and the locking part of the locking ring is constantly pressed upward from the elastically supported state to its normal supported state. Because it was designed to be able to be displaced from
The locking portion of the locking ring is always spaced upward from the upper surface of the vehicle body base to prevent interference between the two, and in any of the above conditions, the locking portion of the locking ring is always separated upward from the upper surface of the vehicle body base to prevent interference between the two, and in any of the above conditions, the locking portion of the locking ring is always separated upward from the upper surface of the vehicle body base to prevent interference between the two. , the hook of the hook block suspended via the wire rope is fixed to the lower side of the locking part of the locking ring or By winding the wire rope after the wire rope has been placed laterally, the hook can be locked without requiring direct human intervention to the locking ring, and the hook of the hook block can be removed from the locking portion of the locking ring. Upon removal, the locking portion of the locking ring immediately moves upward and away from the top surface of the vehicle body base, returning to its normal supporting position where the two do not interfere.

[0008]

[Example] Hereinafter, an example of the hook locking ring support device for a hook block in a crane vehicle according to the present invention will be described.
This will be explained with reference to the drawings.

(First Embodiment) FIG. 1 is a schematic perspective view of a main part of a first embodiment of a hook locking ring support device for a hook block in a crane vehicle according to the present invention, and FIGS. 2 to 4 5 is a schematic side view showing how the hook of the hook block is hooked to the locking portion of the locking ring, and FIG. 5 is a schematic side view of a crane truck implementing the first embodiment of the present invention.

In FIGS. 1 to 5, 1 is a crane truck, 2 is a car body base, 3 is a revolving body rotatably provided on the car body base 2, 3A is a front end surface of the revolving body 3, and 4 is a rotating body. 5 is a boom head of the telescopic boom 4; 6 is a wire rope that is wound up and rewound by a winch W on the rotating structure 3; A hook block is suspended from the boom head 5 by a wire rope 6, 8 is a hook, and 9 is a spring-loaded locking piece. Note that these structures are similar to those of conventional crane trucks.

Reference numeral 11 denotes a U-shaped fixture provided in the vertical direction near the vertical plane passing through the center line of the telescopic boom 4 on the end surface 3A of the revolving body 3, and 13 denotes a locking ring having shape-retaining properties. , the locking ring 13 has a substantially elliptical locking portion 13a;
At its base (right side in FIG. 1), the locking portion 13
A substantially U-shaped bent portion (supporting means) 13b bent downward at a substantially right angle from a, and an upper portion of the bent portion 13b, that is,
Connecting the base part (right side in FIG. 1) of the locking part 13a,
It is constituted by a connecting rod 13 as a horizontal axis serving as the center of rotation. Note that this locking ring 13c has a substantially inverted L shape when viewed from the side.

This locking ring 13 is attached to the end surface 3A of the rotating body 2.
At the same time, the U-shaped fixture 11 is arranged vertically on the same end face 3A so as to straddle the connecting rod 13c, and the end of the fixture 11 is fixed to the end face 3A of the revolving body 3 by welding or the like. The locking ring 13 is rotatably supported around its connecting shaft 13c.

[0013] As a method for attaching this locking ring 13 to the end face 3A of the revolving body 2,
A, after fixing to the fixture 11 by welding or the like in advance, arrange the locking ring 13 with the locking rod 13c removed around the fixture 11, and attach the removed connecting rod 13c to the fixture 1.
1, and both ends of the locking ring 13 are fixed to the base of the locking ring 13 by welding or screwing. The fixture 11 is arranged so as to straddle the thirteen connecting rods 13c, and its both ends are welded and fixed to the end surface 3A.

(Function of the first embodiment) The locking ring 13 of the first embodiment has a connecting rod 13c at its base that expands and contracts at the center of the end surface 3A of the revolving body 3 of the crane truck 1. Since the boom 4 is rotatably attached to the vicinity of the vertical plane including the center line by a fitting 11 vertically welded by welding or the like, the locking portion 13a of the locking ring 13 is connected to the It rotates counterclockwise around the rod 13c due to its own weight, but when the locking portion 13a becomes approximately horizontal, its bent portion 13b comes into contact with the end surface 3A of the revolving structure 3, and the rod 13c rotates counterclockwise. Rotation in this direction is prevented, and the locking portion 13a is always supported in a substantially horizontal direction. The locking ring 13 changes from the state shown in FIG. 1 in which the locking portion 13a is horizontal until the locking portion 13a comes into contact with the end surface 3A of the rotating body.
Rotation in the clockwise direction around the connecting portion (horizontal axis) 13c is permitted.

The telescopic boom 4 of the crane truck 1 is raised and/or expanded and contracted, and the wire rope 6 is operated by a winch.
By winding and unwinding, the hook 8 of the hook block 7 suspended from the boom head 5 via the wire rope 6 is attached to a vertical welded fitting 11 on the end surface 3A of the revolving structure 3. The locking ring 13 is always supported substantially horizontally, and the locking portion 13a is brought close to the left side of the locking portion 13a, and is disposed below the locking portion 13a (
2), since the fixture 11 is vertically provided near the vertical plane including the center line of the telescopic boom 4, the hook is suspended from the head block 5 via the wire rope 6. A block 7 is suspended directly below the locking portion 13a of the horizontal locking ring 13, and the hook block 7
3, the left end of the horizontal locking portion 13a of the locking ring 13 comes into contact with the locking piece 9 of the hook 8, thereby releasing the hook 8.

In this state (FIG. 3), when the wire rope 6 is wound up by the winch W and the hook 8 of the hook block 7 is pulled up directly above, the hook 8 touches the locking ring 1.
The spring-loaded locking piece 9 is automatically engaged with the locking portion 13a of No. 3, and the spring-loaded locking piece 9 returns to its original position, ensuring that the hook 8 and the locking ring 13 are locked together.

Therefore, the operation of locking the hook 8 of the hook block 7 to the locking portion 13a of the locking ring 13 can be performed from the driver's cab (not shown) of the crane truck 1 using its telescopic boom. 4 and winding and unwinding of the wire rope 6 by the winch W, it is possible to directly operate around the locking ring 13 provided on the end surface 3A of the revolving body 3 without placing a person there. After the hook 8 is engaged with the locking portion 13a of the locking ring 13, operations such as lowering and fixing the telescopic boom 4 onto the vehicle body base 2 can be performed from the driver's cab. Can be done continuously.

Furthermore, when the wire rope 6 is loosened and the hook 8 of the hook block 7 is removed from the locking ring 13, the locking ring 13 with the locking portion 13a facing upward and to the left as shown in FIG. Although it automatically rotates counterclockwise around the connecting shaft 13c due to its own weight, its bent portion 13b comes into contact with the end surface 3A of the rotating body 3, and its locking portion 13a is rotated as shown in FIG.
As shown in Fig. 2, the vehicle body base returns to an approximately horizontal position, and the
It stops at a position away from and does not interfere with the hook block 7, and makes it ready for the next hook 8 of the hook block 7 to be locked.

Furthermore, the bent portion 13b of this locking ring 13
has a roughly U-shaped configuration, and its side surface (the right side in FIG. 1) abuts the end surface 3A of the revolving body 3. ring 13
As long as it is supported horizontally, there is no risk of it wobbling to the left or right.

(Modification of the first embodiment) In the above description, the bent portion 13b of the locking ring 13, which has a substantially inverted L shape when viewed from the side, is in contact with the end surface 3A of the rotating body 3. In this embodiment, the locking portion 13a of the locking ring 13 is substantially horizontal, and the locking portion 13a of the locking ring 13 has an inverted L shape. The intersecting angle with the curved portion 13b is configured to form an acute angle (or an obtuse angle) (not shown), and in a state where the bent portion 13b of the locking ring 13 is in contact with the end surface 3a of the rotating body 3, The locking portion 13a may be configured to be inclined slightly downward (or upward) from the connecting rod 13c. In addition, in the explanation regarding this modification, the corresponding reference numerals in FIGS. 1 to 5 showing the first embodiment are appended to the names of the respective parts.

In this modification, the end of the downwardly inclined (or upwardly inclined) locking portion 13a of the locking ring 13 is disposed at a position where it does not interfere with the upper surface 2A of the vehicle body base, and A space greater than the height of the hooking part of the hook 8 of the hook block 7 is secured between the lowest end of the locking part 13a of the locking ring 13 and the upper surface 2A of the vehicle body base. As a result, the hook 8 of the hook block 7 is attached to the locking ring 13 where the locking portion 13a is tilted downward (or upward).
can be inserted by the same operation as in the first embodiment.

Note that when the locking portion 13a of the locking ring 13 is configured to be inclined upwardly from the connecting shaft 13c, the end portion of the locking portion 13a is aligned with the vehicle body base 2 according to the upward inclination. Since the locking ring 13 is spaced further away from the upper surface 2A, the attachment position of the locking ring 13 to the end surface 3A of the revolving body 3 by the attachment tool 11 can be lowered than in the embodiment described above.

(Second Embodiment) Next, a second embodiment of this invention will be described with reference to FIG. 6, which is a schematic side view of the main part, and FIG. 7, which is a schematic perspective view of the main part. do. Note that the parts common to the first embodiment shown in FIGS. 1 to 5 include:
Use the same name and code.

In FIGS. 6 and 7, 3 is a rotating body, 3A
is an end surface of the revolving body 3, 11 is a U-shaped locking ring provided in the vertical direction of the end surface 3A, 15 is a locking ring that is approximately elliptical in plan view, 15a is a locking portion of the locking ring 15, Reference numeral 15b indicates a shaft portion as a horizontal shaft portion of the base of the locking ring 15, and reference numeral 16 indicates a portion from the lower side of the elliptical locking ring 15, which is spaced apart from the shaft portion 15b, rearward of the locking portion 15a (in FIG. 6, the right side). ) It is a U-shaped stay that protrudes downward.

(Operation of the second embodiment) This elliptical locking ring 15 has a horizontal shaft portion 15b at its base that engages with the U-shaped fixture 11, and rotates clockwise or counterclockwise around the coaxial portion 15b. Although it can be rotated clockwise (Fig. 6), its shaft 15
The locking portion 15 is secured by the U-shaped stay 16 provided on the lower side of b.
When a becomes substantially horizontal, rotation in the counterclockwise direction is prevented, that is, the locking portion 15a is prevented from descending below the horizontal direction.

Furthermore, since the U-shaped stays 16 are fixed to the lower parts of the inner sides of the locking ring 15 which are further apart from each other so that they are located on both sides of the fixture 11, the locking ring 15 is As long as it is in the horizontal state, its swinging in the left and right direction is prevented, and the locking ring 15 is stably supported. However, when the locking portion 15a of the locking ring 15 is rotated upward (clockwise) from the horizontal direction, the locking ring 15 is allowed to rotate in the left-right direction.

A hook 8 of a hook block 7 suspended from the boom head 5 of the crane vehicle 1 via a wire rope 6 is attached to this oval locking ring 15 as shown in FIGS. 4 and 5. The remaining functions, such as hooking the hook 8 and locking the hook 8, are substantially the same as those of the first embodiment.

Although not shown, this elliptical locking ring 15 can also be formed into a ring shape having a circular shape, a rectangular shape, or other shapes when viewed from above, and in any case, the elliptical locking ring 15 Similar to the locking ring 15, on the end surface 3A of the rotating body 3,
By mounting with the U-shaped fixture 11 or a fixture substantially similar thereto, substantially the same effect as in the embodiment described above is achieved.

Further, the shaft portion 15b of this elliptical locking ring 15 is rotatably attached to the end surface 3A of the rotating body 3 with the U-shaped ring 11, and the locking portion 1 of the locking ring 15 is rotatably attached to the end surface 3A of the rotating body 3.
In the state shown in FIG. 7 where 5a is approximately horizontal, guide pieces (not shown) for guiding the coaxial portion 15b are placed on both outer sides of the shaft portion 15b, leaving a small gap between them and the outer side of the coaxial portion 15b. If the locking ring 15 is vertically provided, it is prevented from wobbling in the left-right direction when the locking ring 15 rotates in the vertical direction around the U-shaped ring 11.

(Third Embodiment) Next, a third embodiment of this invention will be described with reference to FIG. 8, which shows a schematic perspective view of the main parts thereof. Note that the same names and symbols are used for parts common to the first embodiment shown in FIGS. 1 to 5.

In FIG. 8, 2 is the vehicle body base, 2A is the upper surface of the vehicle body base, 3 is the rotating body, 3A is the end surface of the rotating body 3, and 2
Reference numeral 1 denotes a U-shaped fitting horizontally welded to the end surface 3A, and 21a denotes the top of the U-shaped fitting 21 that is parallel to the end surface 3A of the revolving body 3. It constitutes a horizontal shaft section. 23 is a locking ring,
This locking ring 23 is a locking portion 23 having a rectangular shape in plan view.
a, and a bent portion 23b that is bent downward (FIG. 8) at a substantially right angle to the base thereof, and the overall shape is approximately inverted L when viewed from the side.
formed into a shape. Moreover, this bent portion 23b is the locking portion 23
It constitutes a support part that horizontally supports a. 23c is a connecting portion between the lower side of the locking portion 23a and the left side of the bent portion 23b (FIG. 8), and this connecting portion 23c allows the locking ring 23 to be engaged with the top portion 21 of the U-shaped fitting 21. Secured.

(Function of the third embodiment) This locking ring 23
After inserting the bent portion 23b into the U-shaped fixture 21 provided horizontally on the end surface 3A of the rotating body 3, the locking portion 23 is inserted.
The connecting portion 21a is fixed to the lower side of a and the bent portion 23b by welding or the like, and is rotatably attached. This locking ring 23 rotates counterclockwise (FIG. 8) around the top 21a of the U-shaped fixture 21 due to its own weight, but its bent portion 23b abuts against the end surface 3A of the revolving structure 3 and rotates in the same direction. The locking portion 23a is in a substantially horizontal state, and this horizontal state is always ensured.

The locking portion 2 of the locking ring 23 in this horizontal state
3a, the boom head 5 of the telescopic boom 4 of the crane truck 1
The hook block 7 is suspended from the wire rope 6 via the wire rope 6.
When the wire rope 6 is wound in with the winch W, the hook 8 rises and engages with the locking part 23a of the locking ring 23, and from then on, the above-mentioned The operation is substantially the same as that of the embodiment.

(Fourth Embodiment) Next, in a fourth embodiment of the invention, the locking ring is rotatably disposed on the end face of the revolving body, and a hook is engaged with the locking ring. This will be described with reference to FIG. 9, which is a schematic side view of the state, and FIG. 10, which is a schematic plan view thereof. Note that the same names and symbols are used for parts common to the first embodiment shown in FIGS. 1 to 5.

In FIGS. 9 and 10, 2 is the vehicle body base, 2A is the upper surface of the vehicle body base, 3 is the rotating body, and 3A is the rotating body 3.
, 8 is the hook of the hook block 7 (see Figure 2),
9 is a stop plate with a spring, and 26 is an arc-shaped fixture, and the fixture 26 is attached to the center or slightly higher position of the end surface 3A of the revolving body 3. 27 is a substantially L-shaped receiver, and 27a is an L-shaped receiver 27.
, 28 is a substantially oval locking ring, 28a
is a locking portion of the locking ring 28, and 28b is a shaft portion serving as a horizontal axis of the base of the locking ring 28.

(Function of the fourth embodiment) First, the L-shaped receiving member 27 is arranged on the end surface 3A of the revolving body 3 so that its top portion 27a is horizontal, and is fixed by welding or the like. Next, after placing the elliptical locking ring 28 horizontally on the top 27a of the L-shaped receiving member 27, it is placed on the end surface 3A of the revolving body 3, and the arc-shaped fitting 26 is placed so as to straddle the shaft portion 28b. Arranged vertically,
The end portion is fixed to the upper surface of the horizontal top portion 27a of the L-shaped receiving member 27 and the end surface 3A of the revolving body 3 by welding or the like. As a result, the locking ring 28 is supported substantially horizontally on the small portion 27b of the L-shaped receiving member 18, and is rotatably supported around the shaft portion 28b.

The boom head 5 of the telescopic boom 4 of the crane truck 1 is attached to the lower left side of the locking portion 28a of the locking ring 28.
After placing the hook 8 of the hook block 7 suspended from the wire rope 6, the hook 8 is attached to the wire rope 6.
The hook 8 is engaged with the locking ring 28 while rotating the locking ring 28 clockwise around the shaft portion 28b.

In this fourth embodiment, the elliptical locking ring 28 is supported substantially horizontally by the top 27a of the L-shaped receiving member 27, so that the shaft portion 28b of the locking ring 28 has the first and It is necessary to form the bent portions 13b and 23b as in the third embodiment, or to provide the U-shaped stay 16 near and below the 15 shaft portions 15b of the locking ring as in the second embodiment. do not have.

Note that the top portion 27a of the L-shaped receiving member 27 of this fourth embodiment is configured in a substantially horizontal shape as shown in FIG.
It can also be configured to be inclined slightly downward or upward from the horizontal plane. Further, the order of attachment, such as welding the arc-shaped fixture 26 and the L-shaped receiving member 27 to the end surface 3A of the revolving body 3, can be reversed to that described above. The remaining effects, etc. are as described in the above 1.
This is substantially the same as the embodiment.

(Fifth Embodiment) Next, the fifth embodiment of the present invention will be explained with reference to FIG. 11, which is a schematic side view showing the state in which the locking ring is attached to the end surface of the revolving body, and a hook attached to the locking ring. The description will be made with reference to FIG. 12, which is a schematic side view showing a state in which the hook is hooked, and FIG. 13, which is a schematic side view showing a state in which the hook hooked to the locking ring is pulled in the horizontal direction. In addition, Figure 1
The same names and symbols are used for parts common to those of the first embodiment shown in FIG.

In FIGS. 11 to 13, 2 is a car body base, 2A is an upper surface of the car body base, 3 is a rotating structure, 3A is an end surface of the rotating structure 3, 6 is a wire rope, 7 is a hook block,
8 is a hook, 9 is a spring-loaded stop plate, and 31 is a U-shaped fixture, which is fixed to the vicinity of the lower edge of the end surface 3A of the revolving body 3 by welding or the like. 32 is a locking ring, 32a is a locking portion of the locking ring 32, 32b is a shaft portion as a horizontal shaft at the base of the locking ring 32, and 35 is a tension spring that constantly pulls the locking ring 32 diagonally upward. It is.

(Function of the fifth embodiment) This locking ring 32
The locking ring 32a is always pulled diagonally upward by the tension spring 35, and its left end (FIG. 11) is located above the fixture 31. Even when provided near the lower edge of the end surface 3A, the left end portion (FIG. 11) of the locking portion 32a is largely spaced upward from the upper surface 2A of the vehicle body base 2.

Therefore, there is a wire rope between the upper surface 2A of the vehicle body base 2 and the locking portion 23b of the locking ring 23.
The space S for introducing the hook 8 of the hook block 7 suspended by the hook 6 can be easily secured, and the engagement of the hook 8 with the locking portion 32a of the locking ring 32 can be performed in the same manner as in each of the above embodiments. It can be operated from the operator's cab without requiring any human intervention.

Further, in this fifth embodiment, after hooking the hook 8 to the locking ring 32 as shown in FIG. When the hook block 7 is pulled in a substantially horizontal direction, the locking ring 32 becomes substantially horizontal against the tension spring 35, and at this time, the hook block 7 is placed on the upper surface 2A of the vehicle body base 2. Therefore, in this state, there is no risk that the weight of the hook block 7 will be applied to the locking ring 32.

Note that the locking portion 32a of this locking ring 32
When the hook 8 is pulled out, the locking ring 32 is rotated diagonally upward by the tension spring 35 around the shaft portion 32b to the state shown in FIG. 11, and the locking portion 32a, especially its left end is automatically separated from the upper surface 2A of the vehicle body base to facilitate engagement of the hook 8 with the locking portion 32a. Further, since the locking ring 32 rotates in the horizontal direction against the tension spring 35, the end of the locking portion 32a is prevented from interfering with the uneven portion of the upper surface 2A of the vehicle body base. , Therefore, this fitting 31 and locking ring 32 are attached to the end surface 3 of the rotating body 3.
It can be installed near the lower edge of A.

(Sixth Embodiment) Next, a sixth embodiment of the present invention will be described with reference to FIG. 14, which is a schematic side view, and FIG. 15, which is a schematic plan view. Note that the same names and symbols are used for parts common to the first embodiment shown in FIGS. 1 to 5.

In FIGS. 14 and 15, 2 is the vehicle body base.
2A is the upper surface of the vehicle body base 2, 3 is the revolving body, 3A is the end face of the revolving body 3, 41 is a mounting fixture, 42 is a locking ring approximately Ω-shaped, 42a is a locking ring of the locking ring 42 A portion 42b is a shaft portion serving as a horizontal shaft that opens substantially at right angles from the base of the locking ring 42 to both sides, and the shaft portion 42b is rotatably attached to the fixture 41. 42c is a protruding piece provided on both sides of the base of the locking ring (top and bottom in FIG. 15), 45 is a coil spring,
This coil spring 45 has its winding portion inserted into the shaft portion 42b of the Ω-shaped locking ring 42, and both ends thereof are connected to the end surface 3a of the revolving body 3 and the protruding pieces 42 on both sides of the base of the locking ring 42.
c at the same time, and the locking ring 42 is always elastically supported obliquely upward from the horizontal direction.

(Operation of the sixth embodiment) This Ω-shaped locking ring 42 is biased clockwise around its shaft portion 42b (FIG. 14) by a coil spring 45, and its locking portion 42
a. In particular, since a space S is secured with the end thereof being far away from the upper surface 2A of the vehicle body base 2, the hook 8 of the hook block 7 is arranged in this space S, and the hook 8 of the hook block 7 is placed in this space S. Stop part 4
2a can be engaged with the hook 8 in substantially the same manner as in the fifth embodiment. Therefore, the locking ring 42 of the sixth embodiment can be engaged with the revolving body 3 in the same way as in the fifth embodiment. It can be installed near the lower edge of the end surface 3A.

(Modification) Although not shown, the Q-shaped locking ring 42 of the sixth embodiment is, for example, compressed by a coil spring 45 so that its locking portion 42a stands upright in a substantially vertical manner. In this case, the top of the locking portion 45 of the locking ring 42 that stands upright is configured to be large enough to exceed the end surface 3A of the revolving body 3, so that the wire rope 6 can be After the hook 8 of the suspended hook block 7 is engaged from the side thereof, the wire rope 6 is immediately wound around the hook 8, thereby making it possible to lock the hook 8 to the locking ring 42.

Although not shown, the locking ring 32 of the fifth embodiment shown in FIGS. 11 to 13 also has the following features:
The locking portion 32a of the locking ring 32 may also be configured to be tensioned by a tension spring 35 so as to be vertically erected, and the effect thereof is substantially the same as that of the modification described above. At this time, the tension spring 35 is disposed on the inner side of the end surface 3A of the revolving body 3, and the top of the locking portion 32a of the upright locking ring 32 is located on the inner side of the revolving body 3. End face 3A
If the hook 7 is configured so as to pass over the top of the locking portion 32a, it becomes easy to lock the hook 7 to the locking portion 32a.

[0051]

[Effects of the Invention] (1) A locking ring is provided on the end surface of the revolving body of the crane truck so as to be rotatable around a horizontal axis, and the locking portion is arranged so as not to interfere with the upper surface of the vehicle body base. Since it is supported by the support means, the telescopic boot of the crane truck
After placing the hook of the hook block, which is suspended from the boom head of the boom via a wire rope, from the side of the locking ring to the lower side thereof, without touching the locking ring with human hands, Engagement can be achieved simply by winding the wire rope.

(2) When the hook of the hook block is removed from the locking portion of the locking ring, the locking ring rotates around its support axis, and the locking portion does not interfere with the top surface of the vehicle body base. Since it automatically returns to the original state, there is no risk that the unhooked locking ring of the hook block will hang down and prevent the revolving body from turning or damage the locking ring.

(3) Attach the locking part of the locking ring to the vehicle body base.
The supporting means for supporting the device so as not to interfere with the upper surface of the locking ring can be easily constructed by providing a bent portion at the base of the locking ring or a stay under the base of the locking ring, thereby significantly increasing costs. This invention can be carried out without any invitation.

(4) Vehicle body base of the locking part of the locking ring
A bent part of the locking ring base or a U-shaped stay provided at the base is used as a support means to prevent interference with the top surface of the locking ring.
If the locking ring is configured to contact the end face of the revolving body in a planar manner, the inadvertent wobbling of the locking ring in the left and right direction while the vehicle body is running or the revolving body is turning is reduced.

(5) If the locking portion of the locking ring is constantly pressed upward around its horizontal axis by the pressing means, even when the locking ring is provided near the lower edge of the end face of the revolving structure, The end of the locking part of the locking ring will be separated greatly from the top surface of the vehicle body base, and the hook of the hook block will not be able to engage with the locking part. - This can be done simply by winding up a wire rope suspended from the drum head.

(6) Since the locking portion of the locking ring is constantly pressed upward by the pressing means, at the same time as the hook of the hook block is removed from the locking ring, the locking ring is oriented upward around its horizontal axis. There is no possibility that the locking portion may inadvertently interfere with uneven portions on the upper surface of the vehicle body base.

(7) Since the locking portion of the locking ring is constantly pressed upward by the pressing means, by installing this locking ring near the lower edge of the end face of the revolving structure, the hook block of the crane vehicle can be When the telescopic boom is laid down on the car body base with the hook engaged with the locking part of the locking ring, the hook block is placed on the top surface of the car body base, The weight is not applied to the locking ring, and there is no risk of damaging the locking ring.

[Brief explanation of drawings]

FIG. 1 is a schematic perspective view of a main part of a first embodiment of a hook locking ring support device for a hook block in a crane vehicle according to the present invention.

FIG. 2 is a schematic side view showing a state in which the hook of the hook block is brought close to the locking portion of the locking ring attached to the end surface of the revolving body.

FIG. 3 is a schematic side view showing a state in which the hook of the hook block is disposed below the locking portion of the locking ring, and the locking ring is placed against the stopper of the hook and released.

FIG. 4 is a schematic side view showing a state in which the hook of the hook block is locked to the locking portion of the locking ring.

FIG. 5 is a schematic side view of a crane truck in which the first embodiment of the present invention is implemented.

FIG. 6 is a schematic side view of main parts of a second embodiment of the present invention.

FIG. 7 is a schematic perspective view of the main parts thereof.

FIG. 8 is a schematic perspective view of main parts of a third embodiment of the present invention.

FIG. 9 is a schematic side view of the main parts of a fourth embodiment of the present invention in which a locking ring is arranged horizontally and a hook of a hook block is locked to the locking ring.

FIG. 10 is a schematic plan view of the main part thereof.

FIG. 11 is a schematic side view of main parts of a fifth embodiment of the present invention.

FIG. 12 is a schematic side view showing a state in which a hook is hooked on the locking ring.

FIG. 13 is an explanatory side view of a hook block with a hook hooked to its locking ring, pulled in the horizontal direction.

FIG. 14 is a schematic side view of the main parts of a sixth embodiment of the present invention.

FIG. 15 is a schematic plan view of the main parts thereof.

[Explanation of symbols]

1... Crane truck 2...Car body base 2A……Top surface of vehicle body base 3...Swivel body 3A... end face 4...Telescopic boom 5...boom head, 6...Wire rope 7...Hook block 8...Hook 11...Mounting tool 13, 15...Lock ring 13a, 15a...Locking part 13b...Bending part (base) 13c...Connecting rod (horizontal shaft part) 15b...shaft part (horizontal shaft part) 16...U-shaped stay 21...U-shaped fitting 21a...Top (horizontal axis) 23...Lock ring 23a...Locking part 23b...Bending part (base) 26... arc shaped fitting 27...L-shaped fitting 27a...Horizontal top of L-shaped fixture 28, 32...Oval locking ring 28a, 32a...Locking part 28b, 32b...Shaft part (horizontal axis) 31...Mounting tool 35...Tension spring (oppression means) 42...Lock ring 42a...Locking part 42b...Shaft part (horizontal axis) 42c... protrusion 45...Coil spring (pressure means)

Claims (2)

[Claims] [Claim 1] A locking ring that locks the hook of a hook block suspended via a wire rope from the boom head of a telescoping boom that is movably provided on the revolving body of a crane vehicle. is rotatable around the horizontal axis of the end surface of the revolving body, and is characterized in that the end of the locking portion of the locking ring is supported by a support means so as not to interfere with the upper surface of the vehicle body base. A hook locking ring support device for a hook block in a crane vehicle. [Claim 2] A locking ring that locks the hook of a hook block suspended via a wire rope from the boom head of a telescoping boom that is movably provided on the revolving body of a crane vehicle. is provided rotatably around the horizontal axis of the end surface of the revolving body, and the locking portion of the locking ring with the hook is constantly pressed by a pressing means so as to face upward around the horizontal axis, and A hook locking ring support device for a hook block in a crane vehicle, characterized in that the locking portion of the locking ring is supported so as to be displaceable from its normal supporting position against the pressure means.