JPS60215441A - Working car - Google Patents

Abstract

PURPOSE:To assure travel safety while to reduce the size and to improve the working efficiency of transportation and high position work by employing crawlers shorter than the length of truck to project the cabin side. CONSTITUTION:Cabin 3 is mounted in front of the base 2 of a working car 1 while a working base 4 is mounted at the rear. Rubber crawlers 6, 6 are provided at the opposite sides of said base 2 while having approximately half length of said base 2 where the central portion is located slightly at the rear of the central portion of said base 2 and the cabin 3 side is projected further than the grounding end positions 61, 61 of the crawlers 6, 6 at the cabin 3 side.

Description

[Detailed description of the invention] [Technical field to which the invention pertains] This invention relates to a work vehicle, and in particular, to a highly safe work vehicle suitable for work at high places inside a building under construction, work for transporting materials, etc. It is something.

[Prior art and its problems]

Traditionally, work vehicles include cranes and forklifts, which are so-called construction machines that perform various types of work at construction sites, roads, etc., and are mainly used for outdoor work. Teru. Among such outdoor work, for work at high places, a crane or the like with a workbench attached to the tip is used.

A high-altitude working vehicle such as a crane with a work platform attached to its tip is a vehicle with wheels to improve its mobility.

However, these lane-type high-altitude work vehicles are relatively large and are used, for example, for construction work on electric cable facilities and repair work on the back side of expressways. , so-called relatively unrestricted flat land. Furthermore, even in construction workplaces, it is possible to improve work efficiency by using lane-type aerial work vehicles like this one, but they are large and require a certain amount of width around them. Because of their heavy weight, they are often placed around the outside of buildings at construction sites, and work at high places inside buildings under construction still relies on humans to improve work efficiency. This is not a good idea.What's more, such work at heights is often dangerous.

Therefore, in order to improve efficiency when working at heights such as climbing into the interior of a building under construction, it may be possible to reduce the size of such a wheeled crane-type work vehicle and use it as is. . However, at construction sites inside buildings, materials are scattered and there are grooves, making it easy for vehicles to lose their balance by falling off the wheels or riding over the materials, resulting in a lack of safety. There is a drawback. In particular, it is dangerous because it does not jump out from the floor of the building, and it is almost impossible to use it on the upper floors.
Due to the relationship with these spacings, etc., it is difficult to make it smaller.Secondly, there remains the problem that there is a limit.

Additionally, work during construction requires a large amount of materials, and the current situation is that the loading and unloading of materials generally relies on manual labor, and automation is desired; however, at such work sites, There are many obstacles, and for the same reasons as mentioned above, it is difficult to use small transport vehicles.

[Purpose of the invention]

This invention was made in view of the drawbacks and problems of the prior art, and it solves the drawbacks and problems of the prior art, and also improves the efficiency of various operations inside a building under construction. The first objective is to provide a highly safe work vehicle that is suitable for working at heights and transporting materials in restricted and specific locations.

[Key points of the invention]

A feature of the work vehicle of the present invention for achieving such an object is that the vehicle platform on which the driver's cab and the work platform are mounted has crawlers on both sides of the vehicle with a length shorter than the length of the vehicle chassis, and the driver's cab is The work platform protrudes from the crawler, the center of gravity of the cab is located forward of the ground contact end position of the crawler on the cab side, and the work platform is raised and lowered relative to the chassis by a lifting mechanism, and at least the Is the moment of the center of gravity of the workbench including the mechanism approximately balanced with the moment due to the center of gravity of the driver's cab, which is centered at the ground contact end position or a position at the rear a predetermined distance away from this in consideration of safety? The position is such that it can be returned in the opposite direction.

In this way, by using a crawler that is shorter than the length of the trolley and having the driver's cab side protrude, it is possible to ensure safety in terms of running and to make the crawler compact enough to be used, for example, inside a building under construction. By balancing the moment 1- between the driver's cab side and the workbench side, or by generating a moment 1- which does not return, a small and highly safe working vehicle can be realized.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described in detail using the drawings.

Fig. 1 is a front view of a working vehicle to which this invention is applied;
The figure is a plan view thereof, and FIG. 3 is a side view of the workbench in a raised state. Note that the same parts in each of these figures are indicated by the same reference numerals.

1, it is a work vehicle, and a driver's cab 3 is installed on the front side of the chassis 2.
is placed thereon, and a workbench 4 is placed behind it. Furthermore, rubber crawlers 6.6 are provided on both sides of the chassis 2, and these crawlers 6.6 are approximately half the length of the chassis 2, and are located at the center of the chassis 2. are located slightly behind the center of this chassis 2, and the driver's cab 3 side is the ground contact end position 61.61 of the crawler 6.6 on the driver's cab 3 side (hereinafter referred to as the front ground contact end position 61).
．． 61) Adopt a longer, protruding configuration.

By protruding the driver's cab 3 side in this way, it is possible to increase the travel distance until the front ground contact end position 61.61 of the three examples of the driver's cab of the crawler 6.6 is reached. This makes it possible to stop the work vehicle 1 and change its direction before it falls into a ditch or runs over materials.

As a result, not only can the vehicle be driven safely, but the entire vehicle can be made smaller.

As for its specific size, for example, if the total length of the work vehicle 1 is about 2.5 to 3 m, the crawler 6.6
is about 1m to 1.5m, and in such a case, the distance to the tip of the cab 3 is +1114m, which is the crawler 6.
It can be approximately 1 m from the front ground contact end position 61.61 of the three examples of the driver's cab of No. 6.

Here, the driver's cab 3 consists of a driver's seat 31 and a cover pull l/-1 section 32 adjacent to the driver's seat 31.
A propane gas cylinder (not shown) is provided on the lower side of the 1 side, while an engine 10 (see the notch on the driver's cab 3 side in FIG. 3) and an engine 10 are provided below the cover plate portion 32. A hydraulic pump (not shown) is installed. An inverted U-shaped pipe frame 33 is installed as a partition at an intermediate position between these parts.

Note that 34 is a control box provided in the driver's seat 31, and 35 is a control lever provided in the control box 34.

On the other hand, the chassis 2 is provided with a frame 21, and the workbench 4 is raised and lowered by a lifting mechanism 8. This elevating mechanism 8 is composed of a pantograph-type elevating arm 5 whose lower end is pivotally attached to a frame 21 so as to be slidable, and an elevating device 7 which is pivotally attached to the chassis 2.
Similarly, one end of the upper part of the workbench 4 is slidably pivoted to the frame 4a at the bottom of the workbench 4. Here, the elevating device 7 is composed of a cylinder 71, a piston rod 72 attached to the cylinder 71, and a cylinder device (not shown in the drawing) that is installed on the chassis 2 and rotates the cylinder 71 to raise and lower it. ing.

In addition, as shown in Figures 1, 2, and 3, a front outrigger 11°11 that rotates and opens to both the left and right sides is provided at the rear of the driver's cab 3 between it and the workbench 4. Bracket 1
At the rear end of the frame 2, rear outriggers 13, 13, which similarly rotate and open left and right, are respectively attached via brackets 14. Then, the tip end 3 of the driver's cab 3 of the chassis 2
In a, front ultrasonic sensors 15, 15 for detecting materials, grooves, and the outside of edges are provided on the left and right sides of the chassis 2, respectively, and similarly on the left and right sides of the bracket 14 at the rear of the chassis 2, Similar rear ultrasonic sensors 16°16 are each numbered. And this front ultrasonic sensor 15
．． 15. When a groove or the like is detected by the rear ultrasonic sensor 16.degree. 16, an alarm is activated or the engine is turned off and the brakes are applied, causing the work vehicle 1 to come to a sudden stop.

By the way, as shown in FIG. 2, a crane 9 is installed on the work vehicle 1 along the side surface of the work platform 4 in parallel thereto. This crane 9 is installed as an option.

On the other hand, on the crane 9 side of the workbench 4, there is a comb-shaped side pipe frame 41 and comb-shaped mounting type pipe frames 43, 44.
．． A comb-shaped front pipe frame 42 is provided on the driver's cab 3 side of the workbench 4 to partition the driver's cab 3 and the workbench 4.

Mountable pipe frame 43.44. , f5 are preset at the cent position shown in the figure on the working fourth bottom board 40. Note that there are mounting holes around the bottom substrate 40 for mounting these mounting type pipe frames 43, 44, and 45.

A plurality of 46 are provided. The attachable pipe frames 43, 44, 45 are attached to the bottom substrate 4 as necessary.
By attaching it to the attachment hole 46 of No. 0, the workbench 4 becomes a so-called striped shape, and by selecting the attachment point, it can be opened in any direction.

On the other hand, this front pipe frame 42 has
As shown in the figure, the up/down button 47 is fixed, and the up/down button 47 is provided with an up switch and a down switch. When the lift switch is pressed, the solenoid valve that controls the flow of hydraulic fluid discharged from the hydraulic pump provided under the cover plate part 32 is switched to the side that raises the work platform 4, and the hydraulic fluid is The piston rod 72 is supplied to the cylinder device and the cylinder 71 which is installed on the chassis 2 and rotates the cylinder 71 to raise and lower it, and at the same time the cylinder 71 is raised from the chassis 2, the piston rod 72 is extended and the workbench 4 is raised. In addition, when the rise switch is pressed again, the solenoid valve is switched, the hydraulic pump stops, and the hydraulic fluid reaches 11 (
supply is no longer supplied, and its upward movement stops.

On the other hand, when the lowering switch is pressed, the solenoid valve is switched to the side that lowers the work platform 4, and the hydraulic fluid is supplied to the cylinder device and the cylinder 71 installed in the chassis 2 and rotating the cylinder 71 to raise and lower it. When the cylinder 71 is laid down on the chassis 2, the piston rod 72 is inserted and the workbench 4 is lowered, and when the lowering switch is pressed again, the lowering operation is stopped in the same way as above.

It should be noted that the workbench 4 is raised and lowered to a preset limit position, and then automatically stops.

Now, the work vehicle 1 has front outriggers 11゜11 and rear outriggers 13, 13, which are frequently moved inside a building under construction, including when transporting materials. As a result, work efficiency is poor if these outriggers are lowered each time according to each task. Therefore, in the case of general light work, the outriggers are not lowered. Moreover, in order to ensure running safety, the driver's cab 3 side has a structure that protrudes from the front ground contact end position 61.61 of the crawler 6.6, so that the center of gravity of the entire work vehicle 1 is lowered. It tends to lean towards the front.

In order to ensure sufficient safety under the above circumstances and whether the outrigger is not in use, whether the machine is stopped or running, the center of gravity of the four work platforms is set at a predetermined level in relation to the center of gravity of the three driver's cabs. It is necessary to set it in the position of

That is, a problem caused by the short length of the crawler 6.6 is the balance in the front and back direction. What is important here is that since a crawler is used instead of wheels, even if the work vehicle 1 runs onto the edge of the floor or other materials, the fulcrum of the work vehicle 1 will continue to move along the ground surface of the crawler. This is something that is done in a specific manner. Therefore, unlike the case of wheels, there is no imbalance caused by sudden movement of the fulcrum, but instead it is necessary to consider the balance with the driver's cab 3 side.

Now, as mentioned above, the tip αg+ section 3 of the driver's cab 3 of the chassis 2
A is provided with a front ultrasonic sensor 15.15 for detecting the outside of the material, groove, or edge, and the rear bracket 14 is provided with rear ultrasonic sensors 16, 16 on the left and right, respectively. Even if the work vehicle 1 operates, the work vehicle 1 may run by its inertia and may not be able to stop suddenly enough.

Therefore, the work vehicle 1 backs up and the ground contact end position 62.62 (hereinafter referred to as rear ground contact end position 62.62) side of the crawler 6.6 opposite to the driver's cab 3 side protrudes from the edge of the floor, for example on the upper floor. Assuming that the state of balance is
The front grounding end position of the crawler 6.6 is 61.6 on the driver's cab 3 side.
Due to the structure protruding from 1, relative to the workbench 4 side, a moment in the direction of rotation is applied to the inside of the building using this rear ground contact point w62.62 or the vicinity as a fulcrum, so it is relatively stable.

On the other hand, as the work vehicle 1 moves forward, the driver's cab 3 side protrudes from the edge of the floor on the upper floor, and the front ground end position 61.61 of the driver's cab 3 side of the crawler 6.6 is on the -1 m floor, for example, on the floor. If it protrudes from the edge, the balance state at that time is determined by the relationship between the workbench 4 side and the driver's cab 3 side, and the front ground contact end position 61.61 or a predetermined distance %1l from this in consideration of safety.
There is a possibility that a moment in a rotational direction will act on the outside of the building, using the tilted rear position as a fulcrum.

Therefore, in order to improve stability r*i, it is necessary to apply a rotational moment to the inside of the building even in such a case. Note that the workbench 3 side refers to the lifting fifiI! 8 and a workbench 4, and if a crane 9 is installed as required in the design, the frame 2 including the crane 9 may be installed as necessary.
1 and the weight of the workbench 4 side of the chassis 2 are also taken into consideration. On the other hand, the cab 3 side refers to the ground contact end position 61.61 of the crawler 6.6.
The weight of the side protruding from the driver's seat 31. in this embodiment. Engine 10. It mainly consists of the control box 34 and the like, and also includes various equipment such as a propane gas cylinder located below the driver's seat 31. The weight of the driver's cab 3 side of the vehicle chassis 2 is also taken into consideration as necessary.

By the way, as mentioned above, here, the balance state with respect to the center of gravity of the four examples of workbenches is the center of gravity of the workbench 4 including the lifting mechanism 8, but the moment dl of these centers of gravity!
In this case, there is a case where there is no margin of °ζ compared to the case where the rear rear ground contact end position 62.62 or a position on the front side a predetermined plane M away from this in consideration of safety is used as the fulcrum, for example, when the crawler 6.6 The center position of is 1&rot from the center position of chassis 2.
In cases where the rear fulcrum is too far forward due to a shift of n.m, it is insufficient to consider the center of gravity based on the elevating mechanism 8 and the workbench 4 alone. Furthermore, the moment of the vehicle chassis 2 itself is often influential. Therefore, the above-mentioned center of gravity must be calculated by including these items and also including accessories such as outriggers. In addition, work vehicle 1
is tilted left and right and the fulcrum is inward from the front ground contact end position 61.61. In such a case, the fulcrum position is from the front left and right front contact end position 61.61 Similarly, for the rear ground contact edge position 62.62, the average distance from the left and right rear ground contact edge positions 62°62 is taken.

Based on the above, the center of gravity of the workbench 4 side including the lifting mechanism 8 is set at the front ground contact end position 61. The position is set so that the moment approximately balances with the moment due to the center of gravity on the third side or returns in the opposite direction. Note that the center of gravity of the four examples of work platforms may be considered without including the crane 9 as an option. This is because the crane 9 is installed selectively and at the same time acts to generate a moment in the opposite direction to the driver's cab 3 side, and the center of gravity of the four work platforms is at the ground contact end position. This is because unless it is near the 62.62 side, it acts in the direction of improving safety.

By doing this, even if the balance is lost due to a driving mistake or riding on the vehicle H, and the ground contact end 61.61 comes to the edge of the floor, the work vehicle 1 will fall to the outside. There's nothing to do.

Furthermore, if the inner side of the front contact end positions 6] and 61, which is a predetermined distance away from the front contact end positions 6] and 61, is adopted as a fulcrum, the safety will of course be further improved.

In this sense, the center of gravity of the four examples of work platforms including at least the lifting mechanism 8 is determined by the center of gravity of the driver's cab 3, which has a fulcrum at the ground contact end position or the rear part, which is a predetermined distance away from this in consideration of safety. It is necessary to be in a position where the moment is approximately balanced against the moment or returns in the opposite direction.

In addition, when calculating the center of gravity of the driver's cab 3 side and the four work platforms, it is assumed that one driver is seated on the driver's seat 31, or
Furthermore, the center of gravity may be calculated by including the weight of one or two workers on the workbench 4.

Next, the operation will be explained. For example, taking as an example the work of fixing a pre-framed beam frame assembly to a frame after dropping it onto a pillar, first, place the work vehicle 1 near an arbitrary pillar. The worker moves onto the workbench 4, loads tools and parts as necessary, presses the lift switch 47, raises the workbench 4, and fixes the beam frame. Stop slightly below the position and perform the specified work. When this work is completed, the lowering switch of the elevator 47 is pressed to lower the work platform 4 to the position of the vehicle platform 2. Then, in this state, move the work vehicle 1 to the next pillar position, press the lift switch as before, and raise the work platform 4 to a position slightly below the specified beam frame attachment position. and perform the same operation.

In this way, the work vehicle 1 can be sequentially moved to perform the installation work on the pillars to which the assembled beam frame needs to be installed.

The above example uses the installation of assembled beam frames, but it can also be used for various high-place work at construction sites, and the crane 9 is used to perform the work if necessary.

Furthermore, by using the workbench 4 without being raised, various materials can be used. llt! It goes without saying that it can be used as a work vehicle.

Note that the lift 47 may be provided in the control box 34 of the driver's seat 31 instead of being provided on the workbench 4.

In addition, the work platform 4 rises to the highest position and the work vehicle 1
The control box should 34, the front outriggers 11, 11 and the rear rear I.
The work is carried out by lowering the rigger 13°13 to the floor.

In addition, due to exhaust gas concerns when working inside buildings, the engine is powered by propane gas, but this can also be a gasoline engine, and like electric cars, it is powered by a motor9 and is powered by batteries. Alternatively, it may be operated using commercial power.

As described above, although the embodiments have mainly been explained using construction vehicles, the present invention is not limited to such vehicles, and can be applied to work vehicles that perform various types of work. Of course.

〔Effect of the invention〕

As can be understood from the above description, in the present invention, a vehicle platform on which a driver's cab and a work platform are placed has crawlers on both sides of the vehicle with a length shorter than the length of the vehicle chassis, and the driver's cab is mounted on the crawler. The center of gravity of the cab is located in front of the ground contact end position of the cab of the crawler, and the work platform is raised and lowered relative to the chassis by an elevating mechanism, and at least the elevating mechanism is The center of gravity of the workbench including the
Since it is placed in a position where the moment due to the center of gravity of the driver's cab with the distant rear position as a fulcrum is almost balanced or returns in the opposite direction, the cross section is shorter than the length of the chassis. You can use this to make the cab side stick out.

In this way, by using a crawler that is shorter than the length of the bogie and pushing the driver's cab side, it is possible to ensure running safety and to make the crawler compact enough to be used inside a building under construction, for example. By generating a moment that balances or restores the moments on the driver's cab side and the work platform side, a compact and highly safe work vehicle can be realized.

As a result, the work efficiency of high-place work and transportation work inside a building under construction can be improved, and less manpower is required.

[Brief explanation of the drawing]

Fig. 1 is a front view of a working vehicle to which this invention is applied;
The figure is a plan view of the same, and FIG. 3 is a side view of the working table in the raised state. 1- work vehicle, 2- chassis, 3- driver's cab. 4- workbench, 5- lifting arm; 6.6-Crawler, 7-Lifting device. 8- Lifting mechanism, 9- Crane. 10-engine, 11-front outrigger-112,
14, --- bracket, 13 -- rear outrigger
, 15-Anterior ultrasound sensor. 16- Rear ultrasonic sensor, 31- Driver's seat. 32- cover plate part, 33- pipe frame, 40- bottom board, 41- side pipe frame, 4
2 - Front pipe frame. 43.44.45 - Mounted pipe frames. 47- Lift button, 61.61 =-=front ground contact end position,
62.62 - Rear ground edge position. Patent Applicant Taisei Corporation Nikken Engineering Co., Ltd. Okudaya Giken Co., Ltd. Agent Patent Attorneys Tetsuya Mori Patent Attorney Yoshiaki Naito Patent Attorney Masaru Shimizu Patent Attorney Nobuyoshi Horide

Claims (1)

[Scope of Claims] +11 A vehicle platform on which a driver's cab and a work platform are placed has crawlers on both sides thereof having a length shorter than the length of the vehicle platform, and the driver's platform protrudes from the crawler and the crawler The center of gravity of the driver's cab is located in front of the ground contact end position of the driver's cab, and the work platform is raised and lowered with respect to the vehicle chassis by an elevating mechanism, and at least the work platform side including the elevating mechanism is The center of gravity is such that the moment is approximately balanced or returns in the opposite direction to the moment due to the center of gravity of the driver's cab with the fulcrum being at the ground contact end position or a position at the rear a predetermined distance from this in consideration of safety. A work vehicle characterized by being located in a (2) The center of gravity of the workbench including the lifting mechanism should be set at the ground contact end position of the driver's cab or at a predetermined path l1I in consideration of safety.
The crawler is located at a position such that the moment about the center of gravity on the driver's cab side is approximately balanced or returns in the opposite direction with respect to the moment about the center of gravity on the driver's cab side with the far rear position as a fulcrum, and the crawler is on the opposite side from the driver's cab side. 2. The work vehicle according to claim 1, wherein the work vehicle is located inside the ground contact position of the work vehicle. (3) The driver's cab is a type in which the driver's seat and the engine or fuel tank are installed below or adjacent to the driver's seat, and the center of gravity of the driver's cab is the weight of the driver on board. A work vehicle according to claim 1 or 2, characterized in that the work vehicle includes: (4) The driver's cab is of the type in which a driver's seat and a motor or battery are installed below or adjacent to the driver's seat, and the center of gravity on the driver's cab side is the one with the driver on board. 3. The work vehicle according to claim 1, wherein the center of gravity on the workbench side includes the weight of a standard number of workers.