JPH08226236A - Crashing car - Google Patents

Abstract

PURPOSE: To make it possible to protect a boom from being affected by reaction when an article to be crashed is separated with a crusher and separate the crashed article with a large force and further execute crashing in a wide area even in such a state as the tip of the boom is fixed. CONSTITUTION: A grip holding device 8, which is capable of gripping a very strong fixing structure Y, is mounted on the tip of a boom 24 directly or by way of an intermediate member, thereby enabling the tip of the boom to be fixed. In addition to that, a turning mount 41, which supports the base part of a foldable arm 5 and a turning device 4 which turns the turning mount 41 horizontally and a leveling device 3 which levels out the turning mount in a horizontal posture are installed side by side so that crashing may be executed in a wide area even when the boom 2 is fixed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crushing work vehicle used when demolishing a building or a structure at a height (for example, an elevated road).

[0002]

2. Description of the Prior Art For example, when a building that is no longer needed is to be demolished, it is convenient to use a crushing work vehicle that can perform crushing work at a high place. As this type of crushing work vehicle,
Conventionally, there is one as shown in FIG. 4, but in the conventional crushing work vehicle shown in FIG. 4, a telescopic boom 2 is movably mounted on a swivel base 12 of a vehicle 1, and a tip portion 2 of the telescopic boom 2 is installed.
4, a bending arm 5 is attached, and a crusher 6 is attached to the tip of the bending arm 5.

In the conventional example of FIG. 4, the telescopic boom 2 is
It is lifted up and down by the boom hoisting cylinder 13.
A mounting base 25 for mounting the bending arm 5 is attached to the tip end portion 24 of the telescopic boom 2. Folding arm 5
Is a total of three arms 51, 5 from the base end side to the first to the third.
2 and 53 are sequentially connected so as to be freely bendable. Base end 5 of first arm (base end arm) 51 of bending arm 5
1a is pivotally attached to the upper end of the mount 25. An arm hoisting cylinder 55 is provided between the lower end of the mount 25 and the first arm 51. By expanding and contracting the arm hoisting cylinder 55, the entire bending arm 5 is expanded and contracted. The boom 2 can be undulated within the same vertical plane as the undulating direction. At a tip portion 53b of the third arm (tip arm) 53 of the bending arm 5, a base plate 54 for mounting the crusher 6 is swingable in the up-down direction (the same direction as the up-and-down direction of the bending arm 5). It is pivotally attached. In the folding arm 5, a first bending cylinder 56 is provided between the first arm 51 and the second arm 52, and a second arm 52 is provided.
The second bending cylinder 57 is provided between the third arm 53 and the third arm 53.
Are installed respectively. Further, between the third arm 53 and the base plate 54, a rocking cylinder 58 for vertically rocking the base plate 54 is provided. The crushing machine 6 has a pair of crushing claws 63, 63, and the crushing claws 63, 63 can be opened and closed by an opening / closing cylinder 64 (so-called scissors type). This crusher 6
Is attached to the front surface of the base plate 54 via the rotating device 61 so as to project forward.

To use the conventional crushing work vehicle shown in FIG. 4, the outrigger 11 is grounded in the vicinity of the building Z where the crushing work vehicle is to be demolished, and the vehicle 1
After the crusher 6 is fixed, the telescopic boom 2 is extended by a predetermined length and the swivel base 12 is swung to a predetermined position.
Correspond to the position near the crushed object X. Then, with both crushing claws 63, 63 of the crusher 6 open, the bending arm 5 is raised and lowered and the arms 51 to 53 are bent and extended (the telescopic cylinders 55 to 58 are telescopically operated). ,
The crushing claws 63, 63 are moved to a position where the crushable object X can be grasped, and then the opening / closing cylinder 64 is extended to crush the crushable object X by both crushing claws 63, 63. Also, the crushed object X
When pulling apart the building body from the Z part, both crushing claws 63,
In the state where the object to be crushed X is gripped by 63 (state shown by chain line),
Lifting operation of the bending arm 5 or bending / extending operation of each arm 51 to 53, lifting operation of the telescopic boom 2, or swivel base 1.
The object to be crushed X is pushed and pulled (or laterally swung) by the turning operation 2 and the like.

By the way, the boom has a relatively high strength against an acting force (for example, a load) from its length direction, but an acting force (a bending force) from a direction orthogonal to the boom length direction. Strength) is relatively weak. In particular, in the case where the telescopic boom is used as the boom, the strength is weak with respect to the bending force from the left-right direction and the front-back direction. For example, in the state where the telescopic boom 2 is greatly raised as shown in FIG. When a large acting force is applied to the tip end portion 24 of the telescopic boom 2 from the front-rear direction or the left-right direction, a bending acting force which is not preferable in terms of strength is applied to the telescopic boom 2.

[0006]

However, in the conventional crushing work vehicle shown in FIG. 4, when the crushing object X is pulled away from the building body Z, the crushing machine 6 grips the crushing object X in a state of The crusher 6 is moved back and forth or left and right. At that time, when the crushed object X is firmly adhered to the building body Z, the crushed object must be applied unless a large pulling force is applied. X may not be easily separated from the building body Z. For example, in a reinforced concrete building, the crushed object X
When the building main body Z and the building main body Z are still connected by the reinforcing bar, the crushed object X cannot be easily separated. As described above, in a work in which a large separation force has to be applied to the crushed object X, the reaction force of the separation force acts on the telescopic boom 2 side, and the telescopic boom 2 is moved in the front-back direction or A large bending force is generated from the left and right directions. Therefore, in the conventional crushing work vehicle shown in FIG.
It is said that the telescopic boom 2 is excessively overused and the service life of the telescopic boom 2 is shortened when continuously performing a work in which a high load is applied to the telescopic boom 2 from the front-rear direction or the left-right direction. In addition to problems, it is not possible to work with a pulling force that exceeds the allowable bending strength of the telescopic boom 2,
There was also a problem that the work ability was small.

In view of the above-mentioned problems of the conventional crushing work vehicle, the present invention uses the tip of the boom when the crusher grasps the crushed object and separates the crushed object from the main body of the building or the like. By allowing it to be performed in a state of being fixed to a robust fixed structure, the reaction force of the separating action force can be prevented from affecting the boom side (or reduced as much as possible), and
To provide a crushing work vehicle capable of separating work to be crushed with a large force (that is, increasing work capacity) and capable of performing a wide range of crushing work even with the boom fixed in such a manner. It is an object.

[0008]

As a means for solving the above-mentioned problems, the present invention provides a horizontally swingable swivel on a vehicle, and a boom is mounted on the swivel so that the boom can be raised and lowered.
A crushing work vehicle having a bending arm formed by flexibly connecting a plurality of arms at a tip end portion of the boom, and a crusher for crushing an object to be crushed attached to a tip end portion of the bending arm. , A gripping device capable of gripping a rigid fixed structure is attached to the tip of the boom directly or via an intermediate member, and the bending device is provided between the tip of the boom and the bending arm. It is characterized in that a swivel supporting the base end portion of the arm, a swivel device for horizontally swiveling the swivel, and a leveling device for leveling the swivel in a horizontal posture are respectively provided.

As the boom, only one single boom may be used, but it is preferable to use a telescopic boom in which a plurality of single booms are telescopically connected.

The crusher attached to the tip of the bending arm is
A generally used one can be used, and for example, a scissors type can be used.

A mounting base is detachably connected to the tip of the boom, and a leveling device, a swiveling device for the bending arm, a swiveling base for the bending arm, a bending arm, a crusher, etc. are attached to the mounting base. A crushing work device should be installed.

As described above, when the mounting base is connected to the boom tip portion, the gripping device for gripping the fixed structure may be mounted on the mounting base side. Further, the gripping device may be attached to a leveling device portion (a supporting base of the swinging device for the bending arm) attached to the mounting base. The gripping device may be directly attached to the mount or the leveling device part,
Alternatively, it may be attached via an auxiliary arm or the like. When the auxiliary arm is used, it is possible to use, as the auxiliary arm, a bending arm in which a plurality of arms are flexibly connected. Also, when using the auxiliary arm,
The base end portion side of the auxiliary arm can be made to be undulated up and down with respect to the mounting portion, or can be swung to the left and right.

A hydraulic actuator such as a telescopic cylinder or a rotary cylinder is used as a drive device for various operations in this crushing work vehicle. These drive devices are operated so that they can be operated from the cab of the vehicle. Has become.

[0014]

The crushing work vehicle of the present invention is used by stopping the vehicle near the building where the vehicle is to be demolished. At this time, a crushing work vehicle of this type is generally provided with an outrigger for preventing overturning, but if the outrigger is grounded, stability during work is improved. In this crushing work vehicle, the crushing work can be performed with the tip of the boom fixed to a robust fixed structure by the gripping device as described below, so the overturning moment acting on the vehicle during work is extremely small. Therefore, it is possible to perform the crushing work without grounding the outrigger.

Next, a horizontal swivel operation using a swivel base on the vehicle, a boom hoisting operation, and when a telescopic boom is used, the telescopic boom telescopic operation, an auxiliary arm for a gripping device is used, and the auxiliary arm is used. Is bent or undulated up and down or can be swung to the left and right, the auxiliary arm is operated and the gripping device is operated to make the gripping device a robust fixed structure of the building (for example, a building beam, A pillar or the like), and the gripping device grips the fixed structure. In this way, in the state where the holding device holds the fixed structure, the boom tip end is fixed in a state of being connected to the fixed structure by the holding device. Then, in this state, the bending arm and the crusher are operated to crush the building, etc., but during the crushing work, the work to pull the object to be crushed from the main body of the building while holding it with the crusher is often performed. Be seen. In this case, the acting force at the time of separating the crushed object from the main body of the building often acts in the front-back or left-right substantially horizontal direction, but the reaction force of the separating acting force is applied to the boom tip. By the way, the boom has a weak strength against the acting force in the direction orthogonal to the length direction (acting force in the bending direction of the boom), but as described above, the boom tip is made into a robust fixed structure with a gripping device. When fixed, even if the reaction force is applied to the boom tip, the boom tip is connected and fixed to the fixed structure side, so that almost no influence force (bending force) is exerted on the boom. You can In addition, in this way, when separating the crushed object, the reaction force of the separation acting force acts as a vehicle overturning moment, but work with the boom tip connected and fixed to the fixed structure side. By doing so, the vehicle overturning moment can be absorbed by the fixed structure side. Therefore,
For example, even if the crushing work is performed without grounding the outrigger, the risk of the vehicle tipping over is eliminated.

Further, in the state in which the fixed structure is gripped by the gripping device, the base end (swivel base) of the bending arm to which the crusher is attached is maintained at a fixed position. In the vehicle, the folding arm can be horizontally swiveled around a swivel base at the base end of the folding arm by a leveling device and a swiveling device, and the bending arms can be bent and extended mutually. Therefore, the crusher attached to the tip of the bending arm can be moved to a wide range of front and rear, left and right, and up and down within the maximum extension range of the bending arm around the swivel base for the bending arm. . In this way, in this crushing work vehicle, even when the boom tip is fixed, the crushing machine can perform crushing work in a wide range of front, rear, left and right, and up and down. Further, when the folding arm is rotated horizontally by the leveling device while the swivel base for the folding arm is maintained in a horizontal posture, the crusher is horizontally rotated at the same height position. The risk of the crusher accidentally colliding with a structure or the like is reduced.

When the crushing work with the gripping device in the fixed position is completed, the gripping state by the gripping device is once released, and then a predetermined moving operation is performed to carry out the gripping by the gripping device. The position may be changed and the following crushing work may be performed.

In the crushing work vehicle of the present invention, the gripping device is fixed in a structure in which the reaction force of the separation force is not so large as to the tip of the boom when separating the crushed object. Don't let objects grab you (ie
You can also perform the work (with the boom tip free).

[0019]

In the crushing work vehicle of the present invention, the boom tip portion is connected to the fixed structure side by holding the strong fixed structure by the holding device during the crushing work of the crushed object.
Work can be done in a fixed state, for example, the reaction force applied to the boom tip when pulling apart the crushed object can be absorbed by the fixed structure side, and the influence (bending force) on the boom can be reduced as much as possible. You can In addition, by connecting and fixing the boom tip to the fixed structure side in this way, the bending action force on the boom is reduced during crushing work as described above, so an action force that exceeds the normal allowable bending strength for the boom is used. The work can be performed, and the range in which the work for separating the crushed object can be expanded. Furthermore, as the work can be performed with the boom tip part connected and fixed to the fixed structure side as described above, the falling moment generated during the work can be absorbed by the fixed structure side, and the work safety is improved. There is.

Further, in the crushing work vehicle of the present invention, the base end (swivel base) of the bending arm is maintained at a fixed position when the fixed structure is held by the holding device as described above. , The bending arm can be horizontally swiveled, and each arm of the bending arm can be bent and extended mutually, so even if the tip of the boom is fixed, it can be moved forward and backward, left and right by the crusher. There is an effect that the crushing work can be performed in a wide range of upper and lower areas. Also, with the leveling device maintaining the swivel base for the folding arm in a horizontal posture,
Since the folding arm can be swung to the left and right, at that time, the crusher will turn horizontally at the same height position, and there is less risk of the crusher accidentally colliding with a building or the like. This also has the effect of improving work safety.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIGS. 1 and 2 show a first embodiment of the present invention, and FIG. 3 shows a crushing work vehicle of the second embodiment. Has been done.

The crushing work vehicle of the first embodiment shown in FIGS. 1 and 2 is provided with a swivel base 12 capable of horizontally swiveling on a vehicle 1, and a telescopic boom 2 is mounted on the swivel base 12 so as to be capable of hoisting. The bending arm 5 is attached to the tip end portion 24 of the telescopic boom 2 via the leveling device 3, the turning device 4, and the turning base 41, and further, the crusher 6 is attached to the tip end portion 53b of the bending arm 5 and the boom is used. Intermediate member (25, 3
The gripping device 8 is attached via the first and the seventh).
Further, in the crushing work vehicle of the first embodiment, a mobile crane is used for the base portion (vehicle 1 and telescopic boom 2) as will be described later, and a mounting base is attached to the boom tip portion 24 of the mobile crane. Various devices for performing the crushing work are detachably mounted via the device 25.

A total of four outriggers 11 are attached to the vehicle 1. When the crushing work is performed by the crushing work vehicle, each of the outriggers 11 can be grounded. A driver's cab 10 is mounted on a swivel base 12 on the vehicle 1. In addition, all work operations in this crushing work vehicle can be performed from the driver's cab 10.

The telescopic boom 2 has a total of 3 in the illustrated example.
The book is constructed by connecting the single booms 21 to 23 in a telescopic manner. The telescopic boom 2 can be telescopically moved by a telescopic device provided inside the single boom. The telescopic boom 2 is raised and lowered by a hoisting cylinder 13.

On the tip surface (front surface) of the boom tip portion 24,
A frame-shaped mount 25 is attached. This mount 25
Are connected to the left and right side surfaces of the boom tip portion 24 by two pins at the top and bottom respectively, and the mounting base 25 can be detached from the boom tip portion 24 by removing the pins.

A leveling device 3 is attached to the front side of the mount 25. This leveling device 3 is
A support base 31 whose one end side is pivotally attached to one end (upper end portion in a horizontal state of the boom) of the attachment base 25, and an anti-pivotal side of the support base 31 is tilted toward and away from the attachment base 25. It has a tilting cylinder 32. The tilting cylinder 32 is pivotally attached to the other end of the mount 25 (the lower end in the boom horizontal state). Then, the leveling device 3 tilts the support base 31 toward and away from the mounting base 25 by the expansion / contraction operation of the tilting cylinder 32, so that the support base 31 is placed in a horizontal posture in accordance with the up / down angle of the telescopic boom 2. It is operated so that it is maintained.

A swivel device 4 for swiveling the bending arm is attached to the front surface of the support base 31 (the upper surface in the state where the boom is raised). The swivel device 4 has a general-purpose structure and has a swivel bearing and a hydraulic rotary drive device. In the swivel device 4, the swivel base 41 to which the base end portion 51a of the bending arm 5 is connected is horizontally swiveled on the support base 31 (when the support base 31 is in a horizontal posture).
It's designed to help you.

In the illustrated example, the bending arm 5 is formed by connecting a total of three arms 51, 52 and 53, which are first to third, so as to be sequentially bendable. A base end portion 51 a of a first arm (base end arm) 51 of the bending arm 5 is pivotally attached to the swivel base 41. An arm hoisting cylinder 55 is provided between the swivel base 41 and the first arm 51, and the bending arm 5 as a whole can be hoisted up and down by expanding and contracting the arm hoisting cylinder 55. It is like this. Tip part 5 of third arm (tip arm) 53 of bending arm 5
A base plate 54 for mounting the crusher 6 is pivotally attached to 3b so as to be swingable in the up-and-down direction (the same direction as the up-and-down direction of the bending arm 5). In the bending arm 5, the first arm 5
The first bending cylinder 5 is provided between the first arm 52 and the second arm 52.
6, and a second bending cylinder 57 is interposed between the second arm 52 and the third arm 53. Further, between the third arm 53 and the base plate 54, a rocking cylinder 58 for vertically rocking the base plate 54 is provided.

As the crusher 6, a generally used scissors type machine is adopted. This crusher 6 includes a pair of crushing claws 6 between a pair of support plates 62, 62 which are arranged to face each other.
3, 63 are pivotally mounted, and the crushing claws 63, 63 can be opened and closed by the opening / closing cylinder 64. That is, when the opening / closing cylinder 64 is in the contracted state, the crushing claws 63, 63 are opened (state shown by solid lines in FIG. 1), and when the opening / closing cylinder 64 is extended, the crushing claws are shown by chain lines (reference numerals 63 ', 63').
It's designed to close like you do.

The crusher 6 is attached to the front surface of the base plate 54 in a posture of protruding forward through a rotating device 61. The rotary device 61 has a slewing bearing and a hydraulic rotary drive device so that the crusher 6 can be rotated on the front surface of the base plate 54 in a plane parallel to the front face of the base plate. . When the object to be crushed X is sandwiched between the crushing claws 63, 63 from above and below, the crusher 6 is used in a posture in which the crushing claws 63, 63 are positioned vertically as shown by the solid lines in FIGS. 1 and 2. If the crushed object X is sandwiched from the left and right, the crushing machine 6 is used by changing the posture so that the crushing claws 63, 63 are positioned on the left and right as shown by the chain line in FIG. 2 (reference numeral 6 '). To do.

In the first embodiment, the gripping device 8 includes a mounting base 25 and a leveling device 3 for the boom tip 24.
Are connected to each other via the supporting base 31 and the folding auxiliary arm 7. In the first embodiment, the mounting base 2
5, the support base 31, and the auxiliary arm 7 are the intermediate members in the claims. This gripping device 8 is for gripping a robust fixed structure Y such as a beam or a pillar of a building,
The pair of gripping claws 82, 82 are respectively used for opening and closing the cylinder 8
It is configured so that it can be opened and closed with 3,83. The gripping claws 82, 82 may be opened and closed by a single opening / closing cylinder, like the crusher 6. The gripping device 8 is rotatably attached to the front surface of the base plate 73 via a rotating device 81, as in the case of the crusher 6. Then, in the gripping device 8, a lateral fixed structure Y such as a beam is provided.
When gripping, use the posture in which the gripping claws 83, 83 are positioned vertically as shown by the solid lines in FIGS. 1 and 2.
Further, when gripping a vertically fixed structure such as a pillar by the gripping device 8, the gripping claws 83, 83 are positioned in the left and right positions as shown by the chain line in FIG. 2 (reference numeral 8 '). use.

The auxiliary arm 7 is constructed by connecting the first and second arms 71 and 72 in a freely bendable manner.
The base end portion of the first arm (base end arm) 71 of the auxiliary arm 7 is pivotally attached to the support base 31. In addition, the support base 31 and the first
An auxiliary arm hoisting cylinder 74 is provided between the arm 71 and the arm 71, and the auxiliary arm hoisting cylinder 74 is expanded and contracted so that the entire auxiliary arm 7 can be hoisted up and down. A base plate 73 for attaching the gripping device 8 is pivotally attached to the tip of the second arm (tip arm) 72 of the auxiliary arm 7 so as to be vertically swingable. The first arm 71 and the second arm 72 of the auxiliary arm 7
A bending cylinder 75 is provided between and. or,
A swing cylinder 76 is provided between the second arm 72 and the base plate 73. In this embodiment, the auxiliary arm 7
Is not swingable in the left-right direction with respect to the boom tip portion 24, but in another embodiment, a swinging device (for example, on the bending arm 5 side) is provided between the support base 31 and the auxiliary arm 7. (Similar to the turning device 4) may be provided so that the auxiliary arm 7 can be swung left and right.

A hose reel 14 is attached to a side surface of the base end single boom 21 of the telescopic boom 2, and a hydraulic hose 15 from the hose reel 14 is attached to a side surface of a mounting base 25 (which may be a boom tip portion 24). It is led to the hydraulic control unit 16 attached to. In addition, hydraulic hoses (not shown) are distributed from the hydraulic control unit 16 to various hydraulic actuators such as the bending arm 5, the crusher 6, the auxiliary arm 7, and the gripping device 8.

The crushing work vehicle of the first embodiment is used as follows. First, the crushing work vehicle is run to the vicinity of the building Z to be demolished and stopped there. At this time, if each outrigger 11 is grounded, the vehicle 1
However, the crushing work can be performed without grounding the outrigger 11. Then, a horizontal turning operation by the swivel base 12 on the vehicle 1, a hoisting and telescopic operation of the telescopic boom 2, a hoisting of the auxiliary arm 7 for the gripping device 8 and a bending operation of each arm 71, 72, and a swing cylinder 76. Expansion / contraction operation, rotation operation of the rotation device 61, opening / closing cylinder 8
The fixed structure (for example, the beam) Y is gripped by the gripping claws 83, 83 of the gripping device 8 by performing expansion / contraction operations of 3,3 and the like. As described above, in the state where the fixed structure Y is gripped by the gripping device 8, the boom tip portion 24 is connected to the fixed structure Y by the mounting base 25, the support base 31, the auxiliary arm 7, the gripping device 8, and the like. It is fixed in the closed state. Then, in this state, the bending arm 5 and the crusher 6 are operated to crush the building or the like. At the time of the crushing work, the object to be crushed X is separated from the building body Z while being held by the crusher 6. Work is often done.
In this case, the acting force when separating the crushed object X from the building body Z often acts in the front-back or left-right substantially horizontal direction, but the reaction force of the separating acting force is applied to the boom tip portion 24. Become. By the way, the telescopic boom 2 is weak in strength against the acting force from the horizontal direction (acting force in the bending direction of the boom), but as described above, the boom tip portion 24 is held by the gripping device 8.
When the boom tip portion 24 is fixed to the fixed structure Y, the boom tip portion 24 is connected and fixed to the fixed structure Y side even when the reaction force is applied to the boom tip portion 24. The influence (bending force) on 2 can be almost eliminated. Further, in this way, when the work of separating the crushed object X is performed, the reaction force of the separation acting force acts as a vehicle overturning moment, but the boom tip portion 24 is connected and fixed to the fixed structure Y side. When the work is performed at, the vehicle overturning moment can be absorbed by the fixed structure Y side. Therefore, for example, even when the crushing work is performed without grounding the outrigger 11, the risk of the vehicle 1 tipping over is eliminated. When the crushing work is performed without the outriggers 11 being grounded in this way, the operation of the outriggers 11 is not required when moving the vehicle when changing the crushing place, and the vehicle moving work is facilitated.

When the boom tip portion 24 is connected and fixed to the fixed structure Y side in this manner, the bending action force on the telescopic boom 2 is reduced during the crushing work as described above, so that the telescopic boom 2 is normally operated. The work can be performed with an acting force exceeding the permissible bending strength, and the range in which the work can be separated from the fixing force of the crushed object X can be expanded.

Further, in the state where the fixed structure Y is gripped by the gripping device 8 as described above, the proximal end portion 51a of the bending arm 5 is provided.
Although the (swivel base 41) is maintained in a fixed position, in this crushing work vehicle, the bending arm 5 can be horizontally swung about the swivel base 41 of the bending arm base end portion 51a by the leveling device 3 and the turning device 4. In addition, since the arms 51 to 53 of the bending arm 5 can bend and extend with respect to each other,
The position of the crusher 8 attached to the tip portion 53b of the folding arm can be located in a wide range of front, rear, left and right, and up and down within the maximum extendable range of the folding arm 5 around the swivel base 41. Therefore, in this crushing work vehicle, even if the boom tip portion 24 is fixed by the gripping device 8, the crusher 6 can crush the object X to be crushed in a wide range of front, rear, left and right, and up and down. it can. For example, as shown in FIG. 2, when the bending arm 5 is maximally extended, the crusher 6 can be intruded to the position 6A, and when the bending arm 5 is swung to the left and right, the crusher 6 can be moved 6B or. It can be moved to the 6C position. Further, when the folding arm 5 is swung to the left or right while the swivel base 41 is maintained in the horizontal posture by the leveling device 3, the crusher 6 comes to horizontally swivel at the same height position, and the crusher 6 moves. The risk of accidentally colliding with a building or the like is reduced.

In this crushing work vehicle, the gripping device 8 is fixed in a work such that a large pulling-off force (reaction force) is not applied to the tip of the boom when the crushed object is pulled apart. It is also possible to perform the work without holding the structure Y (that is, with the boom tip portion 24 in the free state).

Further, in the crushing work vehicle of the first embodiment, the mounting base 25 is detachable from the boom tip portion 24, and when the crushing work is not performed, the structure on the front side of the mounting base 25 is used. By removing objects (leveling device 3, turning device 4, bending arm 5, crusher 6, auxiliary arm 7, gripping device 8, etc.) from the boom tip 24 together with the mounting base 25,
It can be used as a normal mobile crane.
In that case, the wire rope may be fed out from the winch on the swivel base 12 side, wound around the sheave of the boom tip portion 24, and then the hanging hook may be attached to the tip side of the wire rope.

The crushing work vehicle of the second embodiment shown in FIG. 3 shows a modification of the mounting structure of the gripping device 8. In the second embodiment, the base plate 73 on the gripping device 8 side is attached to the boom tip portion 24.
It is directly pivotally attached to the mount 25 attached to the. Grasping device 8
The side base plate 73 can be rocked back and forth by a rocking cylinder 76 provided between the base plate 73 and the mounting base 25. Since the other structures in the second embodiment are similar to those in the first embodiment, the description thereof will be omitted.

In the crushing work vehicle of the second embodiment shown in FIG. 3, since the base plate 73 on the side of the gripping device 8 is directly pivotally attached to the mounting base 25, from the boom tip portion 24 to the gripping device 8. The number of intervening members between them is reduced, and the holding strength for the boom tip portion 24 in the state where the holding structure 8 is held by the holding device 8 is increased, and the cost can be reduced by reducing the number of members. Further, since the horizontal distance from the boom tip portion 24 to the gripping device 8 becomes shorter, the boom tip portion 24 can be installed closer to the front wall surface of the building Z. Therefore, in the second embodiment, the crusher 6 can be inserted deeper into the building Z than in the first embodiment, and the crushable range of the building is expanded.

[Brief description of drawings]

FIG. 1 is a side view of a crushing work vehicle according to a first embodiment of the present invention.

FIG. 2 is a plan equivalent view of FIG.

FIG. 3 is a partial side view of a crushing work vehicle according to a second embodiment of the present invention.

FIG. 4 is a side view of a conventional crushing work vehicle.

[Explanation of symbols]

1 is a vehicle, 2 is a boom (extendable boom), 3 is a leveling device, 4 is a turning device, 5 is a bending arm, 6 is a crusher, 7
Is an auxiliary arm, 8 is a gripping device, 12 is a swivel base on the vehicle,
Reference numeral 24 is a boom tip portion, 25 is a mounting base, 31 is a support base of the leveling device, 41 is a swivel base of a bending arm, 51a is an arm base end portion, X is a crushed object, and Y is a fixed structure.

Claims (1)

[Claims] 1. A swivel base (12) capable of horizontally swiveling is provided on a vehicle (1), and a boom (2) is mounted on the swivel base (12) so that the boom (2) can be raised and lowered, and a tip portion () of the boom (2) ( 24) is provided with a bending arm (5) in which a plurality of arms (51 to 53) are bendably connected, and the object to be crushed (X) is crushed at the tip of the bending arm (5). A crushing work vehicle equipped with a crusher (6) for holding a crushing device (8) capable of grabbing a rigid fixed structure (Y) at the tip (24) of the boom (2). Attached directly or via an intermediate member (25, 31, 7), and further, between the tip end portion (24) of the boom (2) and the bending arm (5), the base of the bending arm (5). Edge (5
1a), a swivel base (41), a swivel device (4) for horizontally swiveling the swivel base (41), and a leveling device (3) for leveling the swivel base (41) in a horizontal posture. The crushing work vehicle characterized by