JP2001063975A - Booming working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a booming working vehicle capable of enlarging a working area without increasing the length of a boom and the area of a working floor or sacrificing the size of the working floor and of reducing the length of the vehicle into a compact structure during storage of the boom. SOLUTION: A booming working vehicle has a body 20, a boom 30 provided on the body 20, and a working floor 40 provided at the end of the boom 30 so as to be horizontally turnable. The horizontal turning center S1 of the working floor 40 is offset from both longitudinal and crosswise center lines of the working floor 40 in an area of the working floor 40 in a plan view.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boom type work vehicle in which a work floor is provided at a tip end of a boom provided on a vehicle body so as to be able to turn horizontally.

[0002]

2. Description of the Related Art The work floor of a boom type work vehicle is mounted so as to be horizontally swingable with respect to a swing center post provided at the end of the boom. There is a post attached, a pivoting post attached to a member that protrudes from the work floor to the side, etc., but the pivot center post is located on at least one of the front and rear and left and right centerlines. Is provided. Naturally, it is advantageous for a boom type working vehicle to have a wide working range, that is, a range in which a worker on a working floor can move, but in order to widen such a working range, the boom length is increased (or In addition to the method of increasing the extension of the boom), there is a method of increasing the work floor.

In such a boom type working vehicle, there are a first boom extending above the vehicle body, a second boom extending horizontally from an upper portion of the first boom, and a tip end of the second boom. There is a work vehicle called an over fence work vehicle, which has a third boom extending downward from the bottom and a work floor attached to the lower end of the third boom so as to be able to turn horizontally. In such an overfence work vehicle, the work floor can be positioned by turning and extending the boom so as to straddle an obstacle on the side of the vehicle body, so that work can be performed, for example, below a bridge. . In such a work vehicle, the longer the distance between the side surface of the vehicle body and the side surface of the work floor is, the wider the work range becomes. Therefore, it is advantageous that the length (or extension amount) of the second boom is large.

[0004]

However, when the length of the boom and the work floor are increased as described above in order to widen the working range, the weight of the boom and the work floor is increased, and the members for supporting the same are increased. Due to the necessity of increasing the strength and rigidity of the vehicle, the weight of the vehicle is greatly increased, which leads to an increase in cost. Further, depending on the storage form of the boom and the length of the vehicle body, the boom and the work floor may not be able to be enlarged. Further, when the length of the boom cannot be increased in the overfence work vehicle, the work floor must be reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to increase a working range without increasing the length of a boom or a work floor or sacrificing the size of a work floor. It is another object of the present invention to provide a boom-type work vehicle capable of reducing the vehicle length when the boom is stored and shortening the vehicle length.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a vehicle body, a boom provided on the vehicle body, and a work floor provided at the tip of the boom so as to be capable of horizontal turning. In a boom-type work vehicle (for example, the over-fence work vehicle 10 or the high work vehicle 60 in the embodiment) configured to include the work floor, the horizontal rotation center of the work floor is within the work floor in a planar view area. Are provided at positions offset from both center lines in the front, rear, left and right directions.

As described above, the center of horizontal rotation of the work floor is not only from one center line (for example, the center line in the left-right direction) of the work floor, but also the other center line (for example, the front-back direction) in the plan view area of the work floor. Direction center line), the horizontal turning center and the horizontal turning center are smaller than in the conventional case where the horizontal turning center is provided at a position offset only from one of the center lines. It is possible to increase the distance from the position on the work floor that is farthest from the work floor, and to expand the work area without increasing the boom length or the work floor. In this case, the work floor is positioned such that, of the two work floor sides parallel to each other and positioned parallel to the other center line, the work floor side farther from the horizontal turning center is directed toward the vehicle body center. Since the length of the working floor projecting outward from the boom tip can be made shorter than in the conventional case (when the horizontal turning center is not offset from the other center line), the vehicle when the boom is stowed is retracted. The length can be shortened, and the size can be reduced. Further, if the boom-type working vehicle is of a type in which the boom is stored inside the vehicle body during storage, the vehicle body length itself can be shortened by the above configuration, and the size can be similarly reduced.

Here, in particular, the first boom extends above the vehicle body, the second boom extends horizontally from the top of the first boom, and the second boom extends downward from the tip of the second boom. If the work floor is a boom type work vehicle (over fence work vehicle) provided at the distal end of the third boom, both work floors parallel to each other and located parallel to the other center line. By arranging the work floor so that the side of the work floor that is closer to the horizontal turning center of the side faces faces the center of the vehicle body, the distance between the vehicle body and the work floor can be made larger than in the conventional case described above. The working range can be widened without increasing the length of the boom (second boom) or sacrificing the size of the work floor.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows an over-fence work vehicle 10 which is a first embodiment of a boom type work vehicle according to the present invention. The overfence work vehicle 10 includes a vehicle body 20 having a driver's seat 21 in front and tire wheels 22 at four front, rear, left and right positions, a boom 30 provided on the vehicle body 20 behind the driver's seat 21, and a boom 30. And a work floor 40 for boarding a worker provided at a tip end of the work.

A turning table 23 is provided at the rear of the vehicle body 20. The turning table 23 is driven by a rotation motor (not shown) built in the vehicle body 20 to be able to turn horizontally. . The boom 30 is provided on the swivel base 23, extends upward from the swivel base 23, and can be vertically extended by a built-in telescopic cylinder (not shown).
A boom 31, a second boom 32 extending horizontally from an upper portion of the first boom 31 and extendable by a built-in telescopic cylinder (not shown); And a third boom 33 which can be extended by a built-in telescopic cylinder (not shown). Further, a horizontal holding cylinder 35 for holding the second boom 32 in a horizontal state is provided between the first boom 31 and the second boom 32.

The work floor 40 has a floor member 41 and a handrail 42 for protecting the worker provided on the upper surface side of the floor member 41. A post mounting portion 41 formed at an end of the floor member 41 is provided.
A lower end of a pivot center post 34 provided at an end of the third boom 33 is attached to the upper surface of the third boom 33. Here, as shown in FIG. 3, the center axis AXR1 of the turning center post 34 is not only offset backward by a distance m from the center line L2 in the left-right direction of the work floor 40, but also, It is also offset to the left from the center line L1 in the direction by a distance δ. That is, the horizontal center of rotation S1 of the work floor 40 (this horizontal center of rotation S1 is on the central axis AXR1) is the center line L1, L2 of the work floor 40 in the front-rear, left-right direction in the plane view area of the work floor 40. It is provided at a position offset from. Further, a swing motor (not shown) is provided in the work floor 40, and by operating this, the work floor 40 can be horizontally swung (swinged) around the swing center post 34. ing.

Jacks 50 are provided at four front, rear, left and right sides of the vehicle body 20. This jack 50 is provided with an outer jack 51 by a built-in telescopic cylinder (not shown).
The inner jack 52 can protrude downward, and a roller 53 provided at the lower end of the inner jack 52 is brought into contact with the ground to support the vehicle body 20. The rollers 53 allow the vehicle body 20 to travel and move while the inner jack 52 is extended (while the vehicle body 20 is supported).

A boom operating device 43 is provided on a handrail 42 of the work floor 40. The operator operates levers from the boom operating device 43 to horizontally turn the turntable 23 and extend and retract the booms 31 to 33. The operation and the horizontal turning operation of the work floor 40 can be performed.

Next, the operation of the overfence work vehicle 10 will be described by taking as an example a work performed on the underside of the bridge (for example, a paint repair work). In such work, the operator first drives from the driver's seat 21 to move the overfence work vehicle 10 to the work site. While traveling on this road, the work floor 4
0 is stored in the rear of the driver's seat 21 as shown in FIG. When the vehicle arrives at the work site (bridge B), the vehicle body 20 is stopped in the direction in which the guardrail G extends (the direction in which the bridge B is erected) as shown in FIG. 4, and all jacks 50 are extended to stabilize the vehicle body 20. Let them support you. At this time, if there is a step or the like (for example, a sidewalk) at the side edge of the bridge B, the vehicle body 20 is supported at a position to avoid this.

Subsequently, the worker M gets on the work floor 40 from the ground, operates the lever from the boom working device 43, and
After the boom 31 is extended upward and the work floor 40 is raised, the swivel 23 is swung to move the second boom 32 to the vehicle body 20.
Is extended to the side. Next, the second boom 32 is extended to position the work floor 40 outside the bridge B (at this time, the work floor 40 passes above the guardrail G), and then the third boom 33 is extended downward to perform work. The floor 40 is lowered. When the work floor 40 is lowered, the worker M rotates the work floor 40 around the turning center post 34 so that the work floor 40 does not come into contact with the guard rail G or the side surface of the bridge B. When the work floor 40 is located below the bridge B, the work floor 40 is turned around the turning center post 34 to position the work floor 40 at a desired position where the work is easy (see FIG. 4).

FIG. 1A shows a state in which the first boom 31 is fully extended, and the second and third booms 32 and 33 are fully contracted, and the second boom 32 is perpendicular to the vehicle body 20 (the vehicle body 20 is not moved). FIG. 1 shows a state when the vehicle is turned (sideward).
(B) extends the second boom 32 from the state of (A) to the maximum, extends the third boom 33 to a certain extent downward, and further moves the work floor 40 from the state of (A) to the center line L1 in the front-rear direction. Work floor sides F parallel to each other and positioned parallel to
1 and F2, the work floor 40 is positioned such that the work floor side surface F1 closer to the horizontal turning center S1 faces the center of the vehicle body 20. Note that the hatched area R in FIG. 1 is an area where obstacles and the like can be avoided when the over-fence work vehicle 10 works, and the wider the hatched area R, the wider the work range.

The work floor 40a shown by a two-dot chain line in FIG.
FIG. 3 shows a conventional case where the work area is not offset from (i.e., is on the center line L1). In this figure, the working area of the working vehicle 10 is smaller by the offset (distance δ) than that of the conventional case. It turns out that it becomes wider. The axis AXo1 shown in the figure is the center line L of the work floor 40 in the front-rear direction.
1 is a perpendicular line.

As described above, in the present invention, the work floor 40
Is provided not only in the left-right direction center line L2 but also in the front-rear direction center line L1 in the plan view area of the work floor 40, so that the front-rear direction center line Of the two parallel working floor side surfaces F1 and F2 located parallel to L1, the horizontal turning center S1
The work floor 40 is positioned so that the work floor side F1 closer to the vehicle body faces the center of the vehicle body 20 so that the distance between the vehicle body 20 and the work floor 40 in the conventional case (the horizontal turning center S1 is the horizontal center line) (When only offset from L2). Therefore, the working range can be increased without increasing the length of the boom (the second boom 32) or sacrificing the floor area of the work floor 40.

Next, another embodiment of the present invention will be described. FIG. 5 shows a self-propelled aerial work vehicle 60 which is a second embodiment of the boom-type work vehicle according to the present invention. The aerial work vehicle 60 includes a turntable 7 provided above a vehicle body 70.
1 has a boom 80, and a work floor 90 for mounting a worker is attached to a tip end of the boom 80.

A pair of left and right crawler devices 72 are provided on the sides of the vehicle body 70. By operating the crawler devices 72, the vehicle body 70 can travel. A swivel motor (not shown) is provided in the swivel base 71, and by operating this, the swivel base 71 can be horizontally rotated. The boom 80 has a plurality of nested rectangular booms, and is pivotally connected to an upper portion of a swivel 71 by a foot pin 81. This boom 80
It is possible to raise and lower around the foot pin 81 by activating the raising and lowering cylinder 82 provided between the swivel table 71 and to operate the telescopic cylinder (not shown) built in the boom 80 itself. It is possible to expand and contract to a desired length.

The work floor 90 has a floor member 91 and a handrail 92 for protecting the worker provided on the upper surface side of the floor member 91. The work member 90 is provided on the lower surface of the floor member 91 at the tip of the boom 80. The upper end of the pivot center post 83 is attached. Here, the center axis AXR2 of the turning center post 83 is
As shown in FIG. 6, in the plan view area of the work floor 90, the center of the work floor 90 is not only offset backward by a distance n from the center line L 2 in the left-right direction, but also in the front-rear direction of the work floor 90. It is also offset by a distance Δ to the left from the line L3. That is, the horizontal turning center S2 of the work floor 90
(This horizontal turning center S2 is located on the central axis AXR2).
It is provided at a position offset from the center line in any of the front, rear, left and right directions.

The turning center post 83 is always kept vertical irrespective of the up-and-down angle of the boom 80, so that the floor surface of the work floor 90 is always kept horizontal. Further, a swing motor (not shown) is provided in the work floor 90, and by operating this, the work floor 90 can be horizontally swung (swinged) around the swing center post 83. .

A boom operating device 93 is provided on the handrail 92 of the work floor 90. The operator operates levers from the boom operating device 93, whereby the horizontal turning operation of the swivel table 71, the boom 80 up / down operation, expansion / contraction operation, and the like are performed. A horizontal turning (swinging) operation of the work floor 90 can be performed. Also,
A travel operation device 94 is provided in the vicinity of the boom operation device 93. By operating a lever from the travel operation device 94, the left and right crawler devices 72 can be operated and the vehicle body 70 can travel.

When working at a high place using the high-place work vehicle 60, first, the operator gets on the work floor 90,
As shown in the boom storage state shown by the one-dot chain line in FIG.
0 can be laid down until the work floor 90 is located near the ground, so that the operator can get on and off the work floor 90 from the ground. Next, the operator performs a lever operation from the traveling operation device 94 to travel and move the vehicle body 70, and moves to the work site. When the worker arrives at the work site, the operator operates the lever from the boom operating device 93 to turn the turntable 7.
1. Activate the boom 80 and the work floor 90 to move the work floor 90
To the desired position. Thereby, the worker can perform work at a high place.

The work floor 90 indicated by a two-dot chain line in FIG. 5 is a work floor farthest from the horizontal turning center S2 among the two work floor side surfaces F3 and F4 parallel to each other and parallel to the center line L3 in the front-rear direction. This shows a state in which the work floor 90 is positioned such that the side surface F4 faces the center of the vehicle body 71. From this figure,
In the case of the work vehicle 90, the horizontal turning center is not offset from the center line L3 in the front-rear direction (that is, is on the center line L3) in the conventional case (work floor 90a indicated by a broken line).
It can be seen that the length of the work floor 90 projecting outward from the boom 80 by the offset (distance Δ) is shorter than that by the offset. The axis AXo2 shown in the drawing is a perpendicular line passing through the center line L3 of the work floor 90 in the front-rear direction.

As described above, the horizontal turning center S2 of the work floor 90 is
Is provided not only in the left-right center line L4 of the work floor 90 but also in a position offset from the front-rear center line L3 in the plan view area of the work floor 90.
The work floor 90 is positioned so that the work floor side F4, which is farther from the horizontal turning center S2, of the two work floor sides F3 and F4, which are parallel to the front-rear direction center line L3, faces the center of the vehicle body 71. By doing so, the length of the work floor 90 that protrudes outward from the tip of the boom 80 can be made shorter than in the above-described conventional case, so that the vehicle length when the boom 80 is stored can be shortened, and compactness can be achieved. Can be planned.

FIG. 7 shows a conventional work (work floor 90a) in which the limit line R1 of the work range due to the swing of the work floor 90 is not offset from the center line L3 in the longitudinal direction. From this figure, the horizontal turning center S2 and the position on the work floor 90 farthest from the horizontal turning center S2 in the case of the work vehicle 60 are compared with the conventional case. It can be seen that the distance between. Therefore, according to the present invention, the boom 8
It is possible to expand the work area without making the zero length or the work floor 90.

Although the embodiments of the present invention have been described above, the scope of the present invention is not limited to the above.
For example, the boom-type work vehicle according to the present invention is not necessarily the over-fence work vehicle 10 or the self-propelled aerial work vehicle 60.
It is not necessary that the working floor be provided at the tip of the boom provided on the vehicle body so as to be able to turn horizontally. it can. It should be noted that if the boom-type work vehicle is of a type in which the boom is not located outside the vehicle body when the boom is retracted as in the case of the aerial work vehicle 10 and the boom is accommodated inside the vehicle body when the boom is retracted, the above-described configuration allows the vehicle body length to be increased. This can be shortened, and the size can also be reduced.

In both of the above embodiments, it is assumed that the horizontal turning center of the work floor is offset from the center line in the left-right direction, and the horizontal turning center is further offset from the center line in the front-rear direction from this state. However, since the perspective of the work floor in the front-rear direction and the left-right direction is only relative, it is assumed that the horizontal turning center of the work floor is offset from the center line in the front-rear direction, The horizontal turning center may be further offset from the center line in the left-right direction from this state.

[0030]

As described above, in the boom type work vehicle according to the present invention, the center of horizontal rotation of the work floor is positioned at one center line of the work floor (for example, in the left-right direction) in the plane view area of the work floor. Center line) as well as the other center line (for example, the center line in the front-rear direction), so that the center of horizontal rotation is offset only from one center line as in the related art. It is possible to increase the distance between the horizontal turning center and the position on the work floor farthest from the horizontal turning center, compared with the case where it is provided, and to expand the work area without increasing the boom length and the work floor Is possible. In this case, the work floor is positioned such that, of the two work floor sides parallel to each other and positioned parallel to the other center line, the work floor side farther from the horizontal turning center is directed toward the vehicle body center. Since the length of the working floor projecting outward from the boom tip can be made shorter than in the conventional case (when the horizontal turning center is not offset from the other center line), the vehicle when the boom is stowed is retracted. The length can be shortened, and the size can be reduced. Further, if the boom-type working vehicle is of a type in which the boom is stored inside the vehicle body during storage, the vehicle body length itself can be shortened by the above configuration, and the size can be similarly reduced.

Here, in particular, the first boom extends above the vehicle body, the second boom extends horizontally from the top of the first boom, and the second boom extends downward from the tip of the second boom. If the work floor is a boom type work vehicle (over fence work vehicle) provided at the distal end of the third boom, both work floors parallel to each other and located parallel to the other center line. By arranging the work floor so that the side of the work floor that is closer to the horizontal turning center of the side faces faces the center of the vehicle body, the distance between the vehicle body and the work floor can be made larger than in the conventional case described above. The working range can be widened without increasing the length of the boom (second boom) or sacrificing the size of the work floor.

[Brief description of the drawings]

FIG. 1 is a rear view of an over fence work vehicle showing a first embodiment of a boom type work vehicle according to the present invention.

FIG. 2 is a side view of the overfence work vehicle.

FIG. 3 is a plan view of a work floor for explaining a position of a center of horizontal turning on a work floor of the overfence work vehicle.

FIG. 4 is a rear view of the overfence work vehicle for illustrating a work procedure under a bridge.

FIG. 5 is a side view of an aerial work vehicle showing a second embodiment of a boom type work vehicle according to the present invention.

FIG. 6 is a plan view of the work floor for explaining a position of a horizontal turning center on the work floor of the aerial work vehicle.

FIG. 7 is a diagram showing a limit line of a work range of the aerial work vehicle due to swinging of a work floor in comparison with a conventional case.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Over fence work vehicle (boom type work vehicle) 20 Body 30 Boom 40 Work floor S1 Horizontal turning center L1 Center line in front and rear direction L2 Center line in left and right direction

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masato Kurotaki 1152 Yamashita, Ryoji, Ryoji, Ageo City, Saitama Prefecture Inside Aichi Corporation Ageo Works (72) Inventor Akira Sasaki 1152, Ryoke, Ryoji, Ryoke, Ageo City, Saitama Prefecture No. 10 F-term (reference) in Aichi Corporation Ageo Works 3F333 AA08 AA11 AB04 AC01 AC08 BD02 BE08 DA02

Claims (2)

[Claims] 1. A boom-type work vehicle, comprising: a vehicle body; a boom provided on the vehicle body; and a work floor provided at a tip end of the boom so as to be capable of horizontally turning. A boom-type work vehicle, wherein a center of horizontal rotation of the floor is provided at a position offset from both center lines in the front, rear, left and right directions of the work floor within a planar view area of the work floor. 2. A first boom, wherein the boom extends above the vehicle body, a second boom, which extends horizontally from an upper portion of the first boom, and a second boom, which extends downward from a tip end of the second boom. The work floor comprises three booms, and the work floor is provided at a tip end of the third boom.
The boom type work vehicle described.