JPH10330094A - High lift work vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high lift work vehicle which secures stability of the vehicle, enhances the safety with no risk of tumbling, can be established without involving large-sized construction of vehicle or increase in the weight, and can prevent a counterweight from being left overhung. SOLUTION: A high lift work vehicle runs upon being placed on a deck plate B at a construction site A for a building, etc., and is used to execute works at a high place, in which a working floor 2 equipped with a spreading floor 6 capable of overhanging is mounted on the chassis 3 in such a way as capable of elevating and sinking vertically. A counterweight 14 is installed on the chassis 3 in such a way as capable of moving between the accommodation position and the overhung position where an on-board battery and other heavy apparatus, etc., are accommodated. When the first sensor F senses the overhang of the floor 6, an alarm device E is actuated and emits an alarm, and when the second sensor G senses overhang of the counterweight 14, the alarm is ended.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an aerial work vehicle. That is, the present invention relates to an aerial work vehicle that is used at a building site such as a building and has a work floor mounted on a chassis so as to be able to move up and down.

[0002]

2. Description of the Related Art An aerial work vehicle is carried on a deck plate serving as a temporary floor plate at a construction site such as a building, and is carried on the deck plate to run on columns, beams, ceilings, walls, pipes, and the like. , Wiring, air conditioning, etc.
Used to perform work. And, the work floor is mounted on the chassis so that it can be raised and lowered vertically by the lifting mechanism,
The working floor is displaceable between a base floor fixed horizontally to the elevating mechanism, a storage position on the base floor, and a protruding position horizontally protruded from the base floor and flush with the base floor. And a floor.

[0003]

However, the following problems have been pointed out in this kind of conventional aerial work vehicle. This kind of aerial work vehicle is transported by an elevator or the like at the construction site to carry it on the deck plate, so it needs to be small and it runs on a low-strength deck plate as a temporary floor plate. On the other hand, while the vehicle weight needs to be light, the elevating mechanism is extended at the time of work, and the deployed floor of the work floor is extended to widen the work range. In this kind of conventional aerial work vehicle, the deployment floor of the raised work floor is overhanged despite its small size and light weight, so the center of gravity is biased as a whole and the stability of the vehicle is likely to be impaired In addition, safety problems have been pointed out, such as the danger of falling due to the load moment.

The present invention has been made in view of such circumstances, and has been made in order to solve the above-mentioned problems of the prior art. First, by providing a movable counterweight,
Secondly, it is an object of the present invention to propose an aerial work vehicle in which the stability of the vehicle is ensured and this is realized without increasing the size and weight of the vehicle. A second object of the present invention is to provide a work aerial vehicle in which a warning device is further provided to prevent the counterweight from being forgotten to overhang in addition to the above.

[0005]

The technical means of the present invention for solving such a problem is as follows. First, claim 1 is as follows. That is, this claim 1
The aerial work vehicle is carried on a deck plate serving as a temporary floor plate at a building site such as a building, and is used to travel on the deck plate and thereby carry out work on a work target. . In this aerial work platform, a work floor is mounted on a chassis so as to be vertically movable by a lifting mechanism. The work floor is displaced between a base floor horizontally fixed to the elevating mechanism, a storage position on the base floor, and a protruding position horizontally protruded from the base floor and flush with the base floor. And a possible deployment floor.
And this mobile work vehicle is further provided with a movable counterweight. The counterweight is attached to the undercarriage and has a box shape, in which articles such as a vehicle-mounted battery and other heavy equipment are stored. And, corresponding to the storage position and the overhang position of the deployment floor, the storage position stored on the chassis side and the overhang position overhanging in the opposite direction to the overhang direction of the deployment floor can be moved. Is characterized in that:

Next, claim 2 is as follows. That is, the aerial work vehicle according to the second aspect is the aerial work vehicle according to the first aspect, and further includes the following first sensor, second sensor, alarm device, and the like. That is, the first sensor detects the overhang position of the deployment floor, and the second sensor detects the overhang position of the counterweight.
The alarm device starts an alarm when the deployment floor is displaced from the storage position to the overhang position and the first sensor detects this, whereby the counter weight moves from the storage position to the overhang position to move the second weight to the overhang position. When the sensor detects this, the alarm is terminated.

[0007] Since the aerial work vehicle is configured as described above, it is used in a building site such as a building as follows. First, an aerial work vehicle is transported by an elevator or the like, carried into a deck plate, and loaded. Then, the deployment floor of the working floor is extended from the previous storage position to the overhang position, and accordingly, the counter weight is moved from the previous storage position to the overhang position in the direction opposite to the extension direction of the deployment floor. Therefore, the overall center of gravity is not biased due to the overhang of the deployment floor, and the balance is maintained. In the counterweight, articles such as a vehicle-mounted battery and other heavy equipment are stored. Then, the lifting mechanism is extended and the work floor is raised,
The worker travels and stops, and the worker performs work from a work floor on work objects at high places such as columns, beams, ceilings, walls, piping, wiring, and air conditioning.

According to the second aspect of the present invention, when the deployed floor of the working floor is protruded as described above and the first sensor detects the protruding position, the alarm device starts an alarm to call attention of the worker. . And the counterweight is overhanging,
When the second sensor detects the overhang position, the alarm device ends the alarm.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments of the invention shown in the drawings. FIG. 1, FIG. 2,
3 and 4 are provided for explaining the embodiment of the present invention. FIG. 1 is a front view showing a state in which the elevating mechanism is in a shortened state and the deployed floor and the counterweight are in the storage position. FIG. 2 is a front view showing a state in which the elevating mechanism is in a shortened state and the deployed floor and the counterweight are in the overhang position. FIG. 3 is a front view showing a state in which the elevating mechanism is in an extended state and the deployed floor and the counterweight are in the overhang position. FIG. 4 (1) is a perspective view of a mechanism for moving the counterweight, and FIG. 4 (2) is a block diagram of a control unit and the like of the alarm device. FIG. 5 (1) is a schematic front view showing an aerial work vehicle and the like working on the deck plate, and FIG. 5 (2) is a perspective view of a main part of the deck plate.

First, the aerial work vehicle 1 will be described. FIG.
As shown in FIG. 1 (1), the aerial work vehicle 1 is carried on a deck plate B serving as a temporary floor plate at a construction site A such as a building, and travels on the deck plate B. , Columns C, beams, ceilings, walls, piping, wiring, air conditioning, and other high-altitude work objects. In other words, the aerial work vehicle 1 runs on a deck plate B, which is assembled as a temporary floor plate of each floor, between a number of pillars C, for example, at a building site A inside a steel building, for example. At the same time, the work floor 2 is raised and lowered to a height suitable for work at a high place, and a worker performs work on a work object at a high place from above the work floor 2. For example, a joining operation and an assembling operation of the column C and the beam, a painting / spraying / interioring operation on the column C and the beam, an electric wiring operation, an air conditioning duct operation, a piping operation, and the like are performed. In many cases, the deck plate B serving as a temporary floor board on which the aerial work vehicle 1 is mounted and travels is, as shown in FIG. Is used. FIG.
In FIG. 1 (1), D is an erect elevator.

FIG. 1, FIG. 2, FIG.
As shown in FIG. 3, the work floor 2 is mounted on the chassis 3 so as to be vertically movable by the lifting mechanism 4, and the work floor 2 includes a base floor 5 fixed horizontally on the upper part of the lifting mechanism 4, It has a deployment floor 6 that is assembled to the base floor 5 and that can be displaced to a storage position on the base floor 5 and to a protruding position horizontally protruding from the base floor 5 horizontally.

With respect to the configuration of such an aerial work vehicle 1,
Further details will be described. First, as for the chassis 3, the crawler 7 is used as a traveling means in the illustrated example, but wheels may be used in some cases. The left and right crawlers 7 are endless and are extended between front and rear driving wheels and driven wheels on the left and right sides of the chassis 3, respectively. The driving wheels are driven by a driving motor or the like to travel. It is to be noted that a type using a wheel including only a free wheel without a drive source such as a drive motor is also possible.

Next, as shown in FIG. 3, the elevating mechanism 4 interposed between the chassis 3 and the work floor 2 is composed of three vertical masts as shown in FIG. A first mast, a base mast 8 fixedly erected above, a second mast, an intermediate mast 9 that can be fitted onto the base mast 8,
And a front mast 10 which is a third mast that can be externally fitted to the intermediate mast 9. The base side mast 8, the intermediate mast 9, and the front side mast 10 of the elevating mechanism 4 have a nested structure in the shape of a square pipe, and are driven by a combination of hydraulic or pneumatic cylinders, wires, ropes, chains, and the like. (Not shown), the front mast 10 is extended to the lower intermediate mast 9 and the lower mast 8, and the intermediate mast 9 is extended to the lower proximal mast 8.
It is extended and fitted, stored and shortened by its own weight. The work floor 2 is vertically moved between the raised position shown in FIGS. 1 and 2 and the lowered position shown in FIG. 3 while constantly maintaining the horizontal state by the lifting mechanism 4 as described above. In addition to the mast type shown in the illustrated example, a refraction type or scissors type is used as the lifting mechanism 4. The refraction type lifting mechanism 4 has a structure in which the upper and lower booms are pivotally mounted on the horizontal axis between the chassis 3 and the work floor 2, and the upper and lower booms are moved up and down in synchronization with each other to perform work. The floor 2 is vertically moved between a raised position and a lowered position while always maintaining a horizontal state. Further, the scissor-type lifting mechanism 4 has a structure in which link rods are pivotally mounted between the chassis 3 and the work floor 2 while crossing the left and right in upper and lower stages. And
By displacing the link rods between a state in which the link rods are expanded in a parallelogram and a state in which the link rods are folded substantially horizontally by a cylinder driven by expansion and contraction, the work floor 2 constantly maintains a horizontal state, It is raised and lowered vertically between the up position and the down position. The lifting mechanism 4 is configured as described above.

Next, the work floor 2 will be described.
Consists of a base floor 5 and a deployment floor 6. First, work floor 2
The base floor 5 is horizontally fixed to the upper part of the lifting mechanism 4, in the illustrated example, in the vicinity of the base of the tip-side mast 10 via a mounting frame 11 from the side. On the other hand, the unfolded floor 6 of the working floor 2 projects horizontally from the storage position on the base floor 5 as shown in FIG. 1 and from the base floor 5 as shown in FIGS. Is mounted on the base floor 5 so as to be displaceable. And the deployment floor 6 in the illustrated example
Is pivotally attached to the end of the base floor 5 by a hinge 12 and is assembled so as to be swingable at right angles. It can be positioned and fixed to the unfolded overhang position. The deployment floor 6 may be a slide type in addition to the folding type in the illustrated example using the hinge 12 as described above. That is, the unfolded floor 6 is assembled horizontally slidably with respect to the base floor 5 so as to be horizontally slidable. A slide type is also conceivable, which can be positioned and fixed at an extended position slid so as to be pushed out. 1, 2 and 3 show a work floor 2 and a base floor 5.
And a handrail provided on the deployment floor 6. Work floor 2
It looks like this. The aerial work vehicle 1 is configured to include such a platform 3, an elevating mechanism 4, a work floor 2, and the like. The aerial work vehicle 1 is generally configured as described above.

In this aerial work vehicle 1, a movable counterweight 14 is provided. The counter weight 14 is attached to the slide rail 17 and is provided on the undercarriage 3 side. The counter weight 14 has a box shape, and has therein an article (not shown) such as a vehicle-mounted battery and other heavy equipment. It is stored. Then, corresponding to the storage position and the overhang position of the deployment floor 6 described above,
It can be moved between a storage position where it is stored on the undercarriage 3 side and a protruding position where it protrudes in the direction in which the deployment floor 6 protrudes.

The counterweight 14 will be described in more detail. A car-mounted battery,
Other articles, such as heavy equipment for vehicles, are selectively or coexistently stored. Then, as shown in FIG. 4 (1), for example, a pair of brackets 15 are fixedly attached to the end of the chassis 3 with a space therebetween, and the rollers 16 are respectively turned around the two brackets 15. A pair of slide rails 17, which are movably mounted horizontally and have a counterweight 14 mounted and fixed on the distal end thereof, are assembled to brackets 15 on both sides via rollers 16 respectively. The moving mechanism of the counterweight 14 is, for example, as described above. Thus, the counterweight 14
Is mounted between the two brackets 15 on the chassis 3 via both slide rails 17 with rollers 16, and thus, as shown in FIG. 1, a storage position closer to the chassis 3,
As shown in FIG. 2 and FIG. 3, it can be moved and positioned at a projecting position away from the chassis 3. Such a movement of the counterweight 14 is possible by manual operation, but in the illustrated example of FIG. 4A, the movement is performed by a hydraulic or electric cylinder 18. Also, such a counterweight 14
Are set so as to be opposite in direction to the extending direction of the deployment floor 6 of the work floor 2 described above. That is, the counterweight 14 is provided on the rear end side of the chassis 3 so that, for example, when the deployment floor 6 projects forward, the counterweight 14 projects rearward. The counter weight 14 is configured as described above.

Next, the alarm device E and the like will be described. The aerial work vehicle 1 further includes a first sensor F, a second sensor G,
An alarm device E and the like are provided. And the first sensor F
Detects the overhang position of the deployment floor 6 described above, and the second sensor G detects the overhang position of the counterweight 14. When the deployment floor 6 is displaced from the storage position to the overhang position and the first sensor F detects this, the alarm device E starts an alarm, the counterweight 14 moves from the storage position to the overhang position, and the second sensor G When this is detected, the alarm is terminated.

The alarm device E and the like will be described in more detail. First, the first sensor F is disposed, for example, at the end of the base floor 2 of the work floor 2 so that the unfolded floor 6 is moved to the position shown in FIGS.
When it is displaced to the overhang position as shown in (1), this is directly detected, and the detection signal is sent to the control unit H as shown in FIG. The second sensor G is disposed at the rear end of the chassis 3, for example, at the rear end of the bracket 15 as shown in FIG. 4A, so that the counter weight 14 is provided as shown in FIGS. When the counterweight 14 moves to the overhanging position, the rear end of the slide rail 17 is detected to detect that the counterweight 14 has moved to the overhanging position. As shown in FIG. To the control unit H. As the control unit H, for example, a microcomputer or other control circuit is used. When a detection signal is input from the first sensor F, the control unit H sends a drive-on signal to the drive circuit of the alarm device E and detects the detection signal from the second sensor G. When the signal is input, a drive off signal is sent to the drive circuit of the alarm device E. As the alarm device E, for example, a buzzer is used, and an alarm by a buzzer sound can be performed. However, a lamp that performs a warning by light may be used together with or instead of the buzzer. The alarm device E is, for example, disposed on a base floor 5 of the work floor 2 on which an overall control panel of the aerial work vehicle 1 is provided.
The alarm device E and the like are configured as described above.

The present invention is configured as described above. Then, it becomes as follows. First, the aerial work vehicle 1
As shown in FIG. 1, at all times except during work, the lifting mechanism 4 is shortened and the work floor 2 is lowered, and the deployed floor 6 of the work floor 2 is in the storage position on the base floor 5 and the counterweight 14 is also in the storage position on the undercarriage 3 side. Then, the aerial work vehicle 1 compacted in this way is transported by an elevator D or the like as shown in FIG. 5A, and is carried on a temporary deck plate B as a temporary floor plate.
Can be put on.

Next, as shown in FIG. 2, the aerial work vehicle 1 mounted on the deck plate B is such that the deployed floor 6 of the work floor 2 is moved from its storage position to the base floor 5. At the same time, the counterweight 14 is projected from the storage position up to that point to a projection position opposite to the direction in which the deployment floor 6 projects. The counterweight 14 has a box shape, and stores therein an article such as an in-vehicle battery and other heavy equipment. Then, as shown in FIG. 3, the lifting mechanism 4 of the aerial work vehicle 1 is extended from the previously shortened state, and the base floor 5 and the deployment floor 6 of the work floor 2 are raised. In this way, the working platform 1 has the unfolded floor 6 of the work floor 2 protruded, the counterweight 14 also protruded, and the work floor 2 is raised by the elevating mechanism 4 to travel on the deck plate B. ,Stop. Then, as shown in FIG. 5 (1), for work objects at high places such as columns C, beams, ceilings, walls, pipes, wiring, air conditioning, etc. of the construction site A,
The worker performs a predetermined operation from the work floor 2 on which the deployment floor 6 is extended and the work range is widened.

Further, in the aerial work vehicle 1 shown in the figure, when the deployed floor 6 of the work floor 2 is extended as described above, and the first sensor F detects that the developed floor 6 is at the extended position, as described above. , The alarm device E starts the alarm. Then, after the fact, when the counter weight 14 is extended and the second sensor G detects that the counter weight 14 is at the extended position, the alarm device E ends the alarm. Now, in this aerial work vehicle 1, the following first, second, and third conditions are obtained.

First, this aerial work vehicle 1 is a construction site A
When the work is performed on the deck plate B, as shown in FIG. 3, the elevating mechanism 4 is extended, and the deployed floor 6 of the raised working floor 2 is extended to the extended position. Then, in this aerial work vehicle 1, at this time, the counterweight 14, in which a heavy battery and other equipment are stored, is extended to a projecting position in the direction opposite to the projecting direction of the deployment floor 6. Thus, the bias of the center of gravity as a whole is avoided, and the balance, balance and balance of the entire vehicle are maintained.

Second, in the aerial work vehicle 1, the attached counterweight 14 is always stored in the storage position on the undercarriage 3 side as shown in FIG. Therefore, there is no particular obstruction and no increase in the size of the vehicle is caused. The counterweight 14 attached in this manner has a box shape, and stores therein an article such as a vehicle-mounted battery or a heavy-duty vehicle-mounted apparatus. Thus, the provision of the counterweight 14 does not cause an increase in the weight of the aerial work vehicle 1.

Third, in the aerial work vehicle 1, when the first sensor F detects that the deployed floor 6 of the work floor 2 is overhanging to the overhang position, an alarm device E such as a buzzer issues an alarm. Start and draw the worker's attention. As a result, the operator operates to overhang the counterweight 14 without forgetting, and the counterweight 14 is reliably moved to the overhang position. Then, when the counterweight 14 is overhanged in this manner, the second sensor G detects this, and the alarm by the alarm device E ends.

In the illustrated example, when the unfolded floor 6 of the work floor 2 is extended, the operator operates to extend the counterweight 14, but the counterweight 14 is automatically extended. May be adopted. That is, when the first sensor F detects the overhang of the deployment floor 6, the cylinder 18 shown in FIG. 4A is driven in conjunction with the detection signal based on the detection signal, whereby the counter weight 14 is automatically turned on. It is also possible to make it overhang.

[0026]

As described above, the aerial work vehicle according to the present invention exhibits the following effects by providing the movable counterweight.

First, the stability of the vehicle is ensured. In other words, this aerial work vehicle is used in building sites such as buildings,
When performing work on the deck plate, the deployed floor of the raised working floor projects to the overhang position, and at this time, the counterweight is projected in the opposite direction to the overhang direction of the deployed floor. . As a result, the deviation of the center of gravity is avoided, and the overall balance, balance,
Balance is maintained, stability is ensured,
There is no danger of falling due to the load moment as in the above-described conventional example, and the stability is improved.

Second, this is achieved without increasing the size and weight of the vehicle. That is, in this aerial work vehicle, the attached counter weight is stored in the storage position on the chassis side except during work, and the vehicle remains small without particularly increasing the size of the vehicle. I have. Therefore, when transported by an elevator or the like at a building site such as a building to carry it on a deck plate, the aerial work vehicle does not interfere with the counterweight and the vehicle is small, so there is no problem. Transported and carried in. In addition, the attached counterweight has a structure in which articles such as an existing battery and other heavy equipment for vehicle use are stored inside, so that the weight of the vehicle does not particularly increase. As described above, the aerial work vehicle has a light vehicle weight and can travel on a low-strength deck plate serving as a temporary floor plate without difficulty at a building site such as a building.

In addition, the aerial work vehicle according to the second aspect of the present invention further has the following effects in addition to the above-mentioned effects by further including an alarm device.

Third, forgetting to overhang the counterweight is also prevented. That is, in this aerial work vehicle, the first
When the sensor detects the overhang of the deployment floor of the work floor, the alarm device starts an alarm, and after that, the counter weight is overhang as expected and the second sensor detects this until the second sensor detects this.
Implement warnings to call attention of workers. Thus, when the deployment floor is overhanged, the worker always overhangs the counterweight, and the first point described above is securely secured and implemented. As described above, the effects exhibited by the present invention are remarkably large, for example, all the problems in the conventional example of this kind are solved.

[Brief description of the drawings]

FIG. 1 is a front view for explaining an embodiment of the aerial work vehicle according to the present invention, showing a state in which an elevating mechanism is in a shortened state, and a developed floor and a counterweight are in a storage position.

FIG. 2 is a front view for explaining the embodiment of the present invention, showing a state in which the elevating mechanism is in a shortened state, and the deployed floor and the counterweight are in the extended position.

FIG. 3 is a front view for explaining the embodiment of the present invention, and shows a state in which an elevating mechanism is in an extended state, and a developed floor and a counterweight are in an extended position.

FIG. 4 is provided for describing an embodiment of the present invention, and FIG. 4A is a perspective view of a moving mechanism of a counter weight;
FIG. 2 is a block diagram of a control unit and the like of the alarm device.

5 (1) is a schematic front view showing an aerial work vehicle or the like working on a deck plate, and FIG. 5 (2) is a perspective view of a main part of the deck plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Height working vehicle 2 Work floor 3 Undercarriage 4 Elevating mechanism 5 Base floor 6 Deployment floor 7 Crawler 8 Base end mast 9 Intermediate mast 10 Front end mast 11 Mounting frame 12 Hinge 13 Handrail 14 Counterweight 15 Bracket 16 Roller 17 Slide Rail 18 Cylinder A Building site B Deck plate C Column D Elevator E Alarm device F First sensor G Second sensor H Control unit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI G08B 21/00 G08B 21/00 U

Claims (2)

[Claims] 1. At a building site such as a building, a vehicle is carried in and put on a temporary deck plate serving as a floor plate, and is used to run on the deck plate to perform work on a work object at a high place. A work floor mounted on a chassis so as to be vertically movable by a lifting mechanism, the working floor being a base floor fixed horizontally to the lifting mechanism; And a deployable floor displaceable between a storage position on the base floor and a protruding position horizontally protruded horizontally from the base floor, and provided with a movable counterweight. And
The counterweight is attached to the undercarriage and has a box shape, in which articles such as an in-vehicle battery and other heavy equipment are stored. The counterweight corresponds to the storage position and the overhang position of the deployment floor. The storage position stored on the chassis side,
An aerial work vehicle, which is movable to a projecting position projecting in a direction opposite to a projecting direction of the deployment floor. 2. The aerial work vehicle according to claim 1, further comprising a first sensor, a second sensor, an alarm device, and the like, wherein the first sensor detects a projecting position of the deployed floor. Then, the second sensor detects the overhang position of the counterweight, and the alarm device starts an alarm when the deployed floor is displaced from the storage position to the overhang position and the first sensor detects this, The aerial work vehicle, wherein when the counter weight moves from the storage position to the overhang position and the second sensor detects this, the alarm is terminated.