JPH07187572A - Boom work vehicle with balancer unit - Google Patents

Abstract

PURPOSE:To provide a balancer main body, the fitting height of which can be changed vertically, and to change the fitting height of the balancer main body by utilizing an existing function of a boom work vehicle. CONSTITUTION:A balancer unit 3 installed on a boom forward end part 21 comprises a guide body 31, a slide body 32 capable of sliding in the vertical direction to the guide body, and a balancer main body 30 fitted to the upper end part of the slide body, wherein the guide body 31 can be displaced between the working position located in front of the boom forward end part and the storing position located in the side of the boom forward end part, and the slide body 32 can be moved upward to a designated upward movement position to the guide body 31 by utilizing an existing function of a boom work vehicle. Further, a fixing means 8 for fixing the slide body 32 to the guide body 31 in the upward movement position is provided, thereby moving the balancer main body up and down, and the vertical movement of the balancer main body is performed by an existing function of the boom work vehicle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boom working vehicle with a balancer unit for efficiently and easily installing concrete blocks and the like.

[0002]

2. Description of the Related Art For example, when installing concrete blocks used as curbs, gutters, etc. on roads, place the concrete blocks distributed with pallets at the installation site one by one with a human power, unicycle or backhoe at the installation pitch. It is customary to move it horizontally, install it while adjusting the height.

However, in the case of the above-mentioned work method, it takes a lot of time to move the concrete block from the pallet to the installation site, and the weight of the concrete is about 100 kg. Several times (2 to 2
Since it has to be lifted up three times, there is a problem that the alignment work becomes extremely troublesome and the operator's physical pain is significant.

As a means for dealing with the above problems,
A work vehicle with a balancer unit in which a vehicle (crawler carrier) is equipped with a balancer unit is already known.
The balancer unit equipped on this work vehicle suspends a heavy object with a hook that is vertically provided from one end of an arm, and supports the load of the heavy object while being balanced by air pressure (that is, in an unloaded state). It is a thing. Therefore, when performing work such as installation of heavy objects using this balancer unit, the heavy objects can be moved by horizontally swinging the arms while suspending the heavy objects from one end of the arm. It becomes possible to carry it to a predetermined position within the range without load.

By the way, in this type of work vehicle with a balancer unit, it is preferable that the height of the work vehicle as a whole is lowered by lowering the protruding height of the balancer unit when the vehicle is running, while the balancer unit is When a heavy object is to be installed by using the balancer unit, the higher the main body portion of the balancer unit is, the larger the working space below the main body portion is, which is advantageous in terms of work.

[0006]

However, in the conventional work vehicle with the balancer unit described above, the balancer unit is fixed at a constant height, and therefore the effect of moving the balancer unit up and down as described above is achieved. Can not do it. For example, if the mounting position of the balancer unit is set to a high position, the work space below the balancer body can be made large, but the upward protruding portion of the balancer body may be an obstacle when the vehicle is running. When the mounting position of the main body is set to a low position, it is advantageous when the vehicle is traveling, but there is a problem that the work space under the balancer main body becomes small and the work becomes difficult.

In view of the above problems, the present invention allows the mounting height of the balancer body to be changed up and down, and the mounting height of the balancer body can be changed by using the existing function of the boom work vehicle. An object of the present invention is to provide a boom work vehicle with a balancer unit that can be operated.

[0008]

The invention according to claim 1 of the present application is as follows.
In a boom working vehicle with a balancer unit, which includes a vehicle, a boom that is mounted on the vehicle by a hoisting device so that the boom can be raised and lowered, and a balancer unit that is mounted on the tip of the boom, the balancer unit has a slide portion in the vertical direction. A guide body, a slide body that can slide in the vertical direction with respect to the guide body, and a balancer body attached to an upper end portion of the slide body. Mounted so that it can be displaced between the use position in front of the boom and the retracted position on the side of the boom tip, and the guide body must be mounted so that the slide body can slide up and down with respect to the boom tip. , The lower end of the add-on material was grounded by connecting the add-on material with a predetermined length to the lower part of the slide body and tilting the boom with the hoisting device. A slide body vertical movement device capable of moving the slide body to a predetermined upward movement position with respect to the guide body, and a fixing means for fixing the slide body to the guide body at least at the upward movement position. The feature is that it is provided.

The invention according to claim 2 of the present application is mounted on a vehicle, a boom mounted on the vehicle, a hoisting device for vertically moving a hoisting load hook suspended from the tip of the boom, and a boom tip. In a boom work vehicle with a balancer unit including a balancer unit, the balancer unit includes a guide body having a slide portion in the vertical direction, and a slide body slidable in the vertical direction with respect to the guide body,
A balancer body attached to the upper end of the slide body, and a guide body with respect to the boom tip, a use position located in front of the boom tip, and a storage position located laterally to the boom tip. It is mounted so as to be displaceable between the two, and the abutment member that can vertically interfere with the hanging load hook is attached to the lower part of the slide body, and the hoisting device is hoisted to operate the hanging load hook as the abutting member. After the abutment, a slide body up-and-down device is provided which is capable of moving the slide body to a predetermined upward movement position with respect to the guide body, and the slide body is fixed to the guide body at least at the upward movement position. It is characterized by the provision of fixing means for this.

According to the third aspect of the present invention, a vehicle, a telescopic boom having a plurality of single booms mounted on the vehicle, a telescopic device for telescopically expanding the telescopic boom, and a balancer unit mounted on the boom tip portion are provided. In a boom work vehicle with a balancer unit, the balancer unit includes a guide body having a slide portion in the vertical direction, and a slide body capable of sliding in the vertical direction with respect to the guide body.
A balancer body attached to the upper end of the slide body, and a guide body with respect to the boom tip, a use position located in front of the boom tip, and a storage position located laterally to the boom tip. Between the base boom, which is located on the base side of the tip boom of the telescopic boom, and the lower end of the slide body, a rope is provided via the intermediate sheave to extend the telescopic boom. Accordingly, a slide body up-and-down device is provided which can move the slide body to a predetermined upward movement position with respect to the guide body, and a fixing for fixing the slide body to the guide body at least at the upward movement position. It is characterized by the provision of means.

[0011]

In the boom work vehicle with each balancer unit according to claims 1 to 3, the balancer unit is constructed by attaching the balancer body to the upper end of the slide body that can slide up and down with respect to the guide body. By moving the balancer up and down with respect to the guide body, the balancer body can be moved up and down at the same time.
Further, in the boom work vehicle with each balancer unit according to claims 1 to 3 of the present application, the balancer unit can be stored along the side of the boom that has been laid down on the vehicle during traveling. At that time, even if the guide body of the balancer unit is connected to the boom tip, if the slide body is slid downward with respect to the slide body,
The height of the balancer body can be reduced.

On the other hand, when the balancer unit is used for installation work of, for example, a concrete block, the balancer unit is mounted in front of the tip of the boom (in this state, the slide body is against the guide body). In the lower position, the balancer body and the slide body are moved upward with respect to the guide body, but the slide body moving operation is performed by moving the slide body up and down in the boom work vehicle with each balancer unit according to claim 1. It is performed by the moving device as follows.

First, in the first aspect of the present invention, initially, the balancer unit is attached to the front of the boom tip, the slide body is in the lower position with respect to the guide body, and the slide body is the load carrier of the vehicle. It is located above, and the slide body can move upward with respect to the guide body. According to the slide body up-and-down moving device of claim 1, from this state, the boom is raised by the hoisting device by a predetermined angle (for example, 5 to 10 °) so as to be located between the lower end of the slide body and the upper surface of the vehicle bed. A space for interposing the additional material is secured, and then the additional material is connected to the lower end of the slide body. In this state, the balancer unit is tilted upward together with the boom. Next, the boom is laid down so that the joint material is grounded on the upper surface of the vehicle bed (after this condition, the joint material and the slide body cannot move downward), and then the boom is further laid down by a predetermined angle to guide the guide. The body will slide downward with respect to the slide body. That is, the slide body moves upward with respect to the guide body. Then, by fixing the guide body and the slide body with a fixing means (for example, a pin coupling means), the slide body and the balancer main body can be held at the upper moving position with respect to the guide body. After that, the boom is raised again by a small angle and the splicing material is removed to complete the work of attaching the slide body and the balancer body to the upper movement position. When installing work such as concrete blocks using the balancer unit, adjust the boom hoisting angle and keep the balancer body in a horizontal position. In this state, the space below the balancer body can be increased by the amount that the slide body moves upward with respect to the guide body. When installing a concrete block, etc., if a suspended load (concrete block, etc.) is hung from the balancer body, the weight of the suspended load and the holding force of the balancer body due to the air pressure will antagonize the suspended load. It can be moved horizontally and vertically in a state close to zero gravity.

Further, in the slide body vertical movement device according to the second aspect, the slide body and the balancer body are moved upward by using the hanging load hook which is hung downward from the boom tip. That is, with the balancer unit mounted in front of the boom tip (in this case, the slide body is also slidable upward with respect to the guide body), the hoisting device (winch device) slides the suspended load hook into the slide body. The lower end of the slide body is lowered to a lower position, and an abutting member is attached to the lower end portion of the slide body. Next, the hanging load hook is pulled upward by the hoisting device to abut the lower surface of the abutting member, and then the hanging load hook is further raised to a predetermined upper position to guide the slide body. Can be slid up against the body. And
The lifting operation of the suspended load hook is stopped while the slide body is moved up to a predetermined height. After that, claim 1
Similarly to the case of (3), if the guide body and the slide body are fixed by the fixing means, the hanging load hook is lowered and the abutting member is removed, whereby the upper operation work of the slide body is completed.

Further, in the slide body vertical movement device of the third aspect, the slide body and the balancer body are moved upward by the extension and contraction operation of the telescopic boom. That is, the balancer unit is mounted in front of the boom tip (in this case also, the slide body can slide upward with respect to the guide body), and the telescopic boom is contracted. Next, a rope is provided between the base boom and the lower end of the slide body via an intermediate sheave (for example, provided at a position near the upper portion of the guide body). Then, when the telescopic boom is extended by the telescopic device, the rope is tensioned so that the slide body is moved upward with respect to the guide body, and when the slide body is moved up to a predetermined height, the extension operation of the telescopic boom is performed. Stop. After that, as in each case of claims 1 and 2, after fixing the guide body and the slide body by the fixing means, if the rope is removed while the telescopic boom is slightly contracted, the upper movement work of the slide body is performed. Is complete.

In the first to third aspects, the balancer main body and the slide body held at the upper moving position may be moved downward in the reverse order of the upward moving operation.

[0017]

As described above, in each of the first to third aspects of the present invention, the balancer unit can be retracted to the side of the boom while the vehicle is traveling, with the balancer body moved downward. Since the height of the top surface of the balancer unit can be reduced, the overall height of the boom work vehicle with the balancer unit can be reduced, which is advantageous when the vehicle is traveling. Also, when using the balancer unit, the balancer body can be held in the upward movement position in front of the boom tip, so that the space below the balancer body can be made larger by that amount. Work such as concrete block installation can be done easily. Furthermore, in order to move the balancer body and the slide body upward, it is possible to use the existing functions of the boom work vehicle (raising and lowering the boom, raising and lowering the hanging hook, and extending and retracting the telescopic boom). , It is not necessary to use a special (dedicated) slide body vertical movement device (the existing functions can be effectively used), and the total weight of the balancer body and the slide body is considerably heavy, but the power of the boom work vehicle is high. When used, there is an effect that the upward movement can be performed without any trouble.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 13. The first embodiment of the present invention is shown in FIGS. 1 to 7, the second embodiment is shown in FIGS. 12 to 13 show a boom working vehicle with a balancer unit according to the third embodiment. In the first to third embodiments, the boom work vehicle and the balancer unit 3 are the same as each other. First, common parts of the embodiments will be described.

In the boom working vehicle with the balancer unit of each embodiment, the telescopic boom 2 with the swivel base 11 is mounted on the upper part of the vehicle (truck) 1, while the boom tip 21 is provided.
The balancer unit 3 is mounted on the. The swivel base 11 is provided on the vehicle frame near the cab. The telescopic boom 2 has an undulating device (elevating cylinder) 50.
It is made to rise and fall by means of a telescopic device (expandable cylinder) 70 provided in the boom. The telescopic boom 2 is the base boom 2 in this embodiment.
Although two single booms, 3 and the tip boom 22, are used, it is also possible to use three or more single booms. A suspended load hook 62 is suspended from the boom tip 21 by a wire rope 61, and the suspended load hook 62 is lifted and lowered by a hoisting device (winch) 60 provided on the swivel base 11 side. Reference numeral 12 is a truck bed, and 13 is an outrigger.

The balancer unit 3 includes an outer cylinder (which serves as a guide body in the claims) 31 having a slide portion in the vertical direction as shown in FIGS. 2 and 3, and a vertical direction with respect to the outer cylinder 31. It has a slidable inner cylinder (which is the slide body in the claims) 32 and a balancer body 30 attached to the upper end of the inner cylinder 32. 2 is a perspective view showing a state where the inner cylinder 32 is moving upward with respect to the outer cylinder 31, and FIG. 3 is a state where the inner cylinder 32 is moving downward with respect to the outer cylinder 31. FIG.

The outer cylinder 31 and the inner cylinder 32 are square cylinders. In this embodiment, the outer cylinder 31 has a vertical length of about 440 mm, and the inner cylinder 32 has a vertical length of 1050 to 1050 mm.
It is set to about 1100 mm, and the inner cylinder 32 is the outer cylinder 31.
Is set to have a slide stroke of about 550 to 600 mm. The outer cylinder 31 is formed with one pin hole 37 penetrating the left and right side plates, and
The inner cylinder 32 is formed with pin holes 38a, 38b, 38c at three upper and lower positions, which also penetrate the left and right side plates. Each pin hole 38a, 38b, 38c on the inner cylinder 32 side is
Is slid up and down to selectively overlap with the pin hole 37 on the outer cylinder 31 side, and by inserting the pin 39 into the overlapped pin hole, the inner cylinder 3
2 and the outer cylinder 31 can be fixed to each other. Then, when the pin hole 37 on the outer cylinder 31 side and the pin hole 38a located on the uppermost side on the inner cylinder 32 side are overlapped and pin-joined to each other, the inner cylinder 32 is held in the downward movement position, and the pin hole When 37 and the pin hole 38b located in the middle portion are overlapped and pin-joined, the inner cylinder 32 is held at the upper and lower intermediate positions, and the pin hole 37 and the pin hole 38c located at the bottom are overlapped. When pin-coupled, the inner cylinder 32 is held in the upward movement position. In addition, the pin hole 3 on each side
7, 38a, 38b, 38c and the pin 39 constitute the fixing means 8 in the claims.

On the upper part of the outer cylinder 31, a mounting base 41 for mounting the balancer unit 3 on the boom tip 21 is provided.
Are integrally connected by welding. Also, this mounting base 41
Brackets 42 for connecting to the boom distal end portion 21 are provided at four positions on the upper, lower, left and right sides, respectively. still,
The bracket 42 on the side of the mounting base 41 and the boom tip 21
The bracket on the side is detachably pin-coupled, but when the balancer unit 3 is in use, it is pin-coupled at a total of four places on the left, right, top, and bottom. The balancer unit 3 can be horizontally swung within a range of an angle of about 180 ° between the front use position of the boom tip 21 and the retracted position on the side of the boom, and the balancer unit 3 can be removed by removing all four pins. Can be separated from the boom tip 21.

The balancer body 30 has a first arm 33 which is attached to an upper end of an inner cylinder 32 so as to be horizontally rotatable.
A second arm 34 attached to the lower surface of the tip of the first arm 33 so as to be horizontally rotatable, and the second arm 34.
And a hook 35 vertically hung from one end of the. In the second arm 34, an air balance mechanism (not shown) that adjusts the air pressure so as to balance the predetermined load on the hook 35 is incorporated. The balancer body 30 is publicly known and its detailed description is omitted.

In the first to third embodiments, the inner cylinder 32 and the balancer body 30 can be moved up and down with respect to the outer cylinder 31 by a vertical movement device (which is a slide body vertical movement device in the claims). Has become. The vertical movement device 5 of the first embodiment (FIGS. 1 to 7) utilizes the hoisting operation of the telescopic boom 2, and the vertical movement device 6 of the second embodiment (FIGS. 8 to 11) raises and lowers the suspended load hook 62. Using the operation (operation of the winch 60), the vertical movement device 7 of the third embodiment (FIGS. 12 to 13) uses the extension / contraction operation of the telescopic boom 2.

As shown in FIG. 3, the vertical movement device 5 used in the boom working vehicle with the balancer unit of the first embodiment has a predetermined length (for example, a total length of about 770 mm) added to the lower end of the inner cylinder 32, as shown in FIG. ) The additional material 51 is used.
An engagement piece 52 that engages with a connection hole 36 provided in the lower end surface of the inner cylinder 32 is formed at the upper end portion of the replenishment member 51. The connecting hole 36 and the engaging piece 52 are each formed in a rectangular shape. The engaging piece 52 can be horizontally rotated by an angle of 90 ° by a lever 53. Then, in order to connect the replenishment member 51 to the lower end portion of the inner cylinder 32, the engaging piece 52 is brought into a posture in which the engaging piece 52 matches the connecting hole 36 by the lever 53.
When the lever 53 is returned to its original position after the insertion into the connecting hole 36, the engaging piece 52 is locked on the upper surface side of the connecting hole 36, whereby the joining material 51 can be added below the inner cylinder 32. . In addition, the replenishment work of the replenishment material 51 is
As will be described later, the telescopic boom 2 is raised at a slight angle.

The upward movement operation of the inner cylinder 32 by the vertical movement device 5 of the first embodiment is performed as follows. First, as shown in FIG. 1, initially, the balancer unit 3 is attached to the front of the boom tip portion 21, the inner cylinder 32 is in the downward movement position with respect to the outer cylinder 31, and the inner cylinder 32 is the cargo bed of the vehicle. It is located above 12, and the inner cylinder 32 can move upward with respect to the outer cylinder 31 (pin 39 is removed). From this state, as shown in FIG. 4, the hoisting cylinder 50 is extended to elevate the telescopic boom 2 by a predetermined angle (for example, 5 to 10 °), and between the lower end of the inner cylinder 32 and the upper surface of the vehicle carrier 12. A space for interposing the additional material 51 is secured in the interior of the inner cylinder 32, and the additional material 51
To connect. In this case, the engagement piece 52 of the replenishment member 51 is engaged with the connection hole 36 on the lower surface of the inner cylinder 32. In this state, the telescopic boom 2 and the balancer unit 3 are also tilted upward. Next, from the state of FIG.
To collapse the telescopic boom 2 and add the joint material 51
As shown in FIG. 5, the lower end of the telescopic boom 2 is grounded on the upper surface of the vehicle bed 12 (the addition member 51 and the inner cylinder 32 cannot be moved downward after this state), and the telescopic boom 2 is further laid down by a predetermined angle thereafter. The outer cylinder 31 is slid downward with respect to the inner cylinder 32. That is, the inner cylinder 32 moves upward with respect to the outer cylinder 31. At this time, the inner cylinder 32 is at a predetermined upper movement position with respect to the outer cylinder 31 as shown by the chain line in FIG. 3 (reference numeral 32 '), and the pin hole 38c at the lowermost end on the inner cylinder 32 side has the outer cylinder 31. The pin holes 37 on the side are overlapped. Then, by inserting the pin 39 into the pin hole 37 on the outer cylinder 31 side and the pin hole 38c at the lowermost end on the inner cylinder 32 side, the inner cylinder 32 and the balancer main body 30 are moved in the upper moving position with respect to the outer cylinder 31. Can hold After that, the telescopic boom 2 is raised again at a small angle and the connecting member 51 is removed, whereby the work of attaching the inner cylinder 32 and the balancer body 30 to the upper movement position is completed. The inner cylinder 32 may be held at an intermediate position with respect to the outer cylinder 31 (in FIG. 3, the pin hole 37 and the pin hole 38b are connected by the pin 39), if necessary.

Next, using this boom work vehicle with a balancer unit, for example, the work of installing a curb on the road will be explained. At the construction site, the crane of the boom work vehicle lifts the concrete blocks together with the pallet and loads them onto the platform 12. Then, drive to the concrete block installation site. At this time, the balancer unit 3 is stored on the side of the boom, and the inner cylinder 32 and the balancer main body 30 are fixed to the outer cylinder 31 in the downward movement position (in FIG. 3, the inner cylinder 32 side is fixed). Top pin hole 3
8a and the pin 39 is inserted into the pin hole 37 on the outer cylinder 31 side). In this state, the height of the upper end surface of the balancer body 30 becomes low, which is advantageous during traveling. Then, as shown in FIG. 6 and FIG. 7, the boom work vehicle is stopped at the installation site (at this time, if the outrigger 13
Is grounded to make the loading platform 12 horizontal), and the balancer unit 3 is set on the front surface side of the boom tip portion 21. or,
The inner cylinder 32 and the balancer main body 30 are held in the upper moving position by performing the above-described upward movement operation, and further, the hoisting angle of the telescopic boom 2 is adjusted to maintain the balancer main body 30 in a horizontal posture. In this state, the space below the balancer body 30 can be increased by the amount that the inner cylinder 32 moves upward with respect to the outer cylinder 31, so that the work space below the balancer body 30 is widened and the installation work is performed. Etc. are easy to do.
Then, in order to install the concrete block W, the suspension jig 10 suspended from the hook 35 of the balancer body 30 is used to move the pallet loaded on the platform 12 from the pallet 1
Take out the concrete blocks W one by one and install them in place. At this time, the weight of the suspended load W and the holding force of the balancer body 3 due to the air pressure counteract each other, and the suspended load can be moved in the horizontal direction and the vertical direction in a state close to zero gravity. In the boom working vehicle with the balancer unit of this embodiment, the first arm 33 and the second arm 34 of the balancer body 30 keep the telescopic boom 2 in a fixed position so that the circle range indicated by P in FIG. Even if the vehicle 1 is stopped at a fixed position, the work can be performed on a considerably large area by rotating the telescopic boom 2 horizontally or telescopically extending the telescopic boom 2. Further, when the installation of the workable range at the fixed position is completed, the vehicle 1 may be moved to perform the installation work in the next work range.

The vertical moving device 6 of the second embodiment shown in FIGS. 8 to 11 uses an abutting member 63 as shown in FIG. The abutting member 63 has a laterally oriented outer cylinder 64 and an inner cylinder 65, and the inner cylinder 65 is provided with a holding portion 66 of a U-shaped plan view for holding the wire rope 61 of the hanging hook 62. An engaging piece 67 similar to the engaging piece 52 of the replenishing member 51 of the first embodiment is provided on the upper surface of the outer tube 64, and the outer tube 64 is further provided.
The inner cylinder 65 and the inner cylinder 65 are integrally formed by two shafts including a thick shaft 68 and a thin shaft 69. Then, as shown in FIG. 8, the upward movement operation of the inner cylinder 32 and the balancer main body 30 is performed by mounting the balancer unit 3 in front of the boom tip 21 (in this case, the inner cylinder 32 is also different from the outer cylinder 31). The slidable boom 2 is extended until the hanging load hook 62 is located further rearward than the rear end of the loading platform 12. Then, as shown in FIG. 9, the abutment member 63 is attached to the lower end portion of the inner cylinder 32 in a state in which the hoisting device (winch device) 60 lowers the suspended load hook 62 below the lower end of the inner cylinder 32. In addition, the attaching operation of the abutting member 63 is performed by inserting the engaging piece 67 of the abutting member 63 through the connecting hole 36 provided in the lower end portion of the inner cylinder 32, and then, the angle of 90 °
Only by rotating horizontally. Also, at this time,
The holding portion 66 of the abutting member 63 holds the wire rope 61 that suspends the hanging hook 62. Then, the hoisting device 60 pulls the hanging load hook 62 upward to cause the hanging load hook 62 to abut against the lower surface of the abutting member 63, and then to further lift the hanging load hook 62 to a predetermined upper position. The inner cylinder 32 can be slid upward with respect to the outer cylinder 31. Then, in a state where the inner cylinder 32 is moved up to a predetermined height, the lifting operation of the suspended load hook 62 is stopped. After that, as in the case of the first embodiment, after the pin 39 is inserted through the pin holes 37, 38c (see FIG. 3) of the outer cylinder 31 and the inner cylinder 32, the both cylinders 31, 32 are fixed. If the hanging load hook 62 is lowered and the abutting member 63 is removed, the inner cylinder 3
The upper operation of 2 is completed. The abutment member 63 used in the second embodiment is provided when the hoisting device 60 is in an overwinding state (the laterally outer casing 64 of the abutment member 63 is attached to the balancer unit 3 by the hanging load hook 62). The thin shaft 69 is designed to fold against the lower end of the outer cylinder 31 due to its upward dynamic pressure, and the sound of damage to the thin shaft 69 can alert the operator. There is.

In the vertical movement device 7 of the third embodiment shown in FIGS. 12 to 13, the inner cylinder 32 is moved by the telescopic boom 2 extending and retracting.
Also, the balancer body 30 is moved upward. That is, the balancer unit 3 is mounted in front of the boom tip portion 21 (in this case, the inner cylinder 32 is also slidable upward with respect to the outer cylinder 31), and the telescopic boom 2 is contracted. Next, the rope 71 is provided between the base boom 23 and the lower end portion of the inner cylinder 32 via the intermediate sheave 72 (provided near the upper portion of the outer cylinder 31). In this embodiment, a sheave 73 is also provided at the lower end of the inner cylinder 32, the rope 71 is wound around the intermediate sheave 72 and the lower sheave 73, and then the rope end is fixed to the outer cylinder 31. When the telescopic boom 2 is extended by the telescopic device (telescopic cylinder) 70, the rope 71 is tensioned to move the inner cylinder 32 upward with respect to the outer cylinder 31, and the inner cylinder 32 is moved up to a predetermined height. When it moves, the extension operation of the telescopic boom 2 is stopped. After that, the first or second
As in the case of the embodiment, after fixing the outer cylinder 31 and the inner cylinder 32 with the fixing means 8, the telescopic boom 2 is slightly contracted and the rope 71 is removed, whereby the upper operation of the inner cylinder 32 is completed. .

In the first to third embodiments, the balancer body 30 and the inner cylinder 32 which are held in the upper moving position.
Can be moved down in the reverse order of the upward movement.

[Brief description of drawings]

FIG. 1 is a side view of a boom work vehicle with a balancer unit according to a first embodiment of the present invention.

FIG. 2 is a partial perspective view of FIG.

3 is a vertical cross-sectional view of a slide portion of the balancer unit of FIG.

FIG. 4 is a state change diagram of FIG.

5 is a state change diagram of FIG. 4. FIG.

FIG. 6 is a side view of the boom work vehicle with the balancer unit shown in FIG. 1 in use.

FIG. 7 is a plan view of FIG.

FIG. 8 is a side view of a boom working vehicle with a balancer unit according to a second embodiment of the present invention.

9 is a state change diagram of FIG. 8. FIG.

10 is a vertical cross-sectional view showing an upward movement operation state of the boom work vehicle with the balancer unit shown in FIG.

11 is a state change diagram of FIG.

FIG. 12 is a side view of a boom working vehicle with a balancer unit according to a third embodiment of the present invention.

FIG. 13 is a state change diagram of FIG.

[Explanation of symbols]

1 is a vehicle, 2 is a boom (extendable telescopic boom), 3 is a balancer unit, 5, 6 and 7 are vertical moving devices (slide body vertical moving devices), 8 is fixing means, 11 is a swivel base, and 21 is a boom tip. , 22 is a tip boom, 23 is a base boom,
30 is a balancer main body, 31 is an outer cylinder (guide body), 32
Is an inner cylinder (slide body), 37 is an outer cylinder side pin hole, 38a,
38b and 38c are inner cylinder side pin holes, 39 is a pin,
50 is an undulating device, 51 is a replenishing member, 60 is a hoisting device, 62 is a hanging hook, 63 is an abutting member, 70 is a telescopic device, 71 is a rope, and 72 is an intermediate sheave.

Claims (3)

[Claims] 1. A vehicle (1), a boom (2) mounted on the vehicle (1) so as to be capable of hoisting by a hoisting device (50), and a balancer unit mounted on a tip portion (21) of the boom (2). A boom working vehicle with a balancer unit, comprising: (3), wherein the balancer unit (3) includes a guide body (31) having a slide portion in a vertical direction, and a vertical direction with respect to the guide body (31). Slideable body (32)
And a balancer body (30) attached to the upper end of the slide body (32), and the guide body (31) with respect to the boom tip (21) in front of the boom tip (21). Mounted so as to be displaceable between a use position located on the side of the boom and a storage position located on the side of the boom tip (21), and a connecting member (51) having a predetermined length is connected to a lower portion of the slide body (32). Then, the boom (2) is lifted (5).
0) to lie down to add the above-mentioned additional material (51)
After the lower end of the slide body is grounded, a slide body up-and-down moving device (5) capable of moving the slide body (32) up to a predetermined upward movement position with respect to the guide body (31) is provided. A boom work vehicle with a balancer unit, characterized in that a fixing means (8) for fixing the (32) to the guide body (31) at least in the upward movement position is provided. 2. A hoist for vertically moving a vehicle (1), a boom (2) mounted on the vehicle (1), and a suspended load hook (62) suspended from a tip (21) of the boom (2). A boom working vehicle with a balancer unit, comprising a device (60) and a balancer unit (3) mounted on the boom tip (21), wherein the balancer unit (3) has a slide portion in the vertical direction. Guide body (31) and slide body (32) slidable in the vertical direction with respect to the guide body (31)
And a balancer body (30) attached to the upper end of the slide body (32), and the guide body (31) with respect to the boom tip (21) in front of the boom tip (21). Is mounted so as to be displaceable between a use position located on the side of the boom and a storage position located on the side of the boom tip (21), and the hanging hook (6) is mounted on the lower part of the slide body (32).
By attaching an abutment member (63) capable of vertically interfering with 2) and hoisting the hoisting device (60), the hanging load hook (62) is abutted on the abutment member (6).
The slide body up-and-down moving device (6) is provided so that the slide body (32) can be moved up to a predetermined upward movement position with respect to the guide body (31) after abutting against the slide body. A boom working vehicle with a balancer unit, comprising a fixing means (8) for fixing the (32) to the guide body (31) at least in the upward movement position. 3. A vehicle (1), a telescopic boom (2) having a plurality of single booms (22, 23) mounted on the vehicle (1), and a telescopic device (1) for telescopically extending the telescopic boom (2). 70) and a balancer unit-equipped boom work vehicle including a balancer unit (3) mounted on the boom tip (21), wherein the balancer unit (3) is a guide body having a slide portion in the vertical direction. (31) and a slide body (32) slidable in the vertical direction with respect to the guide body (31)
And a balancer body (30) attached to the upper end of the slide body (32), and the guide body (31) with respect to the boom tip (21) in front of the boom tip (21). Is mounted so as to be displaceable between a use position located on the boom and a retracted position located on the side of the boom tip (21), and is a base boom located on the base side of the tip boom (22) of the telescopic boom (2). (23) and the slide body (3
The rope (71) is provided between the lower end of the slide body (2) and the lower end of the slide body (2), and the telescopic boom (2) is extended to move the slide body (32) into the guide body (3).
1) A slide body vertical movement device (7) capable of moving up to a predetermined upper movement position is provided, and the slide body (32) is fixed to the guide body (31) at least at the upper movement position. A boom working vehicle with a balancer unit, characterized in that it is provided with a fixing means (8).