JP3158925U - Aerial work platform - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aerial work platform having a simple structure, a small number of parts, being lightweight, compact, having a small turning radius, being inexpensive, and having excellent stability. An aerial work platform 1 includes a small mobile vehicle 3, an elevating boom device 5, and an outrigger, and the elevating boom device 5 is rotatably connected to a support post 25 and a support post 25. The elevating boom 29, the second elevating boom 33 rotatably connected to the first elevating boom 29, the elevating basket 35 connected to the second elevating boom 33, and the first elevating boom 29 in a state of not interfering with each other. 2 It is configured by providing an elevating cylinder that acts near the center of gravity of the elevating boom 33, and at least the outrigger provided in front of the vehicle body frame 9 is a swing arm type outrigger 16. [Selection diagram] Fig. 4

Description

  The present invention relates to an aerial work vehicle equipped with a lifting boom device that is used when working at high places, such as overhanging work for electric wires and telephone lines, and is particularly small and easy to move in narrow areas. Related to high-altitude work vehicles.

  An overhead work vehicle equipped with a lifting boom device on a moving vehicle is used in order to ensure safety of work performed at a high place in the construction work of an electric wire or a telephone line. In general, such an aerial work vehicle uses a relatively large moving vehicle such as 2 tons and 4 tons as shown in Patent Document 1 below, and includes front, rear, left and right corner portions in a body frame of the moving vehicle. Is provided with a drawer-type outrigger as shown in Patent Document 2 below, so that safety during operation is maintained.

The conventional lifting boom device has a complicated structure, a large number of parts, a heavy weight, and a large size. Therefore, it is necessary to secure a space for the structure or storage, so that the conventional lifting boom device must be mounted on a relatively large mobile vehicle as described above. Did not get.
On the other hand, there are a wide range of sites where high-altitude work is carried out, and there are many demands for using small trucks or light trucks of less than 2 tons that are easy to move around in narrow spaces with densely populated houses. .

Japanese Utility Model Publication No. 58-176900 Japanese Utility Model Publication No. 4-31067

However, when the moving vehicle is a small truck or a light truck of less than 2 tons, the lifting boom device having the above structure cannot be mounted as it is. Therefore, it is necessary to develop a new lifting boom device that is simple in structure, has a small number of parts, is light and small.
In addition, when the small truck or light truck is used, the length of the vehicle body frame on which the lifting boom device is installed is shortened and the installation area is reduced. Therefore, the structure using only the outrigger of the above structure is sufficient. The stability of the vehicle cannot be ensured, and serious accidents such as vehicle rollover may occur. Moreover, the problem that the outrigger of the said structure cannot be installed also arises by restrictions of installation space.

  The present invention has been made on the basis of these points, and the object of the present invention is to reduce the size and weight of the lifting boom device by simplifying the structure of the lifting boom device and reducing the number of parts. Mobility that enables the installation of a lifting boom device on a moving vehicle, and also enables the mobile vehicle and the lifting boom device to be supported safely in a well-balanced manner by modifying the outrigger extension structure to increase the distance between the ground contact points of the front and rear outriggers. The object is to provide an aerial work vehicle that combines safety, safety and economy.

  In order to achieve the above object, an aerial work vehicle according to claim 1 of the present invention includes a self-propelled mobile vehicle including a driver's seat and a body frame, a lift boom device mounted on the mobile vehicle, and the lift boom. In an aerial work vehicle having an outrigger that holds the posture of the moving vehicle during use of the device, the moving vehicle is a small truck or a light truck of less than 2 tons, and the lifting boom device is provided at the rear of the driver's seat A support post raised upward from the vehicle body frame, a first lifting boom whose base end portion is pivotally connected to an upper end portion of the support post, and the first lifting boom A second lifting boom in which a base end portion is rotatably connected to a free end portion; a lifting rod connected in a state of maintaining a horizontal posture on the free end side of the second lifting boom; and First lift A lifting cylinder provided between the vicinity of the center of gravity of the second lifting boom and the lower end of the support post without interfering with the vehicle, and the outriggers are provided on the front, rear, left and right of the body frame. The at least the outrigger provided in front of the vehicle body frame is a swing arm type outrigger.

  Further, the aerial work vehicle according to claim 2 is the aerial work vehicle according to claim 1, wherein the swing arm type outrigger is pivotally connected to the vehicle body frame by a pivot pin. A swing arm that swings by a predetermined angle in the horizontal direction and a jack device that is provided at a free end of the swing arm and that expands and contracts in the vertical direction are provided, and the swing arm rotates in a direction closest to the body frame. The swing angle of the swing arm is set to be 100 ° or more between the posture and the extended posture rotated in the direction farthest away from the vehicle body frame.

  Further, the aerial work vehicle according to claim 3 is the aerial work vehicle according to claim 1 or 2, wherein a guide member is vertically raised in the vehicle body frame in the vicinity of the support post so as to be extendable in a vertical direction. The free end of the guide member is pivotally connected to the second lifting boom.

  An aerial work vehicle according to a fourth aspect of the present invention is the aerial work vehicle according to any one of the first to third aspects, wherein the first elevating boom and the second elevating boom are folded horizontally on the body frame. A boom receiving column that supports the second lifting boom in the retracted state is provided.

  An aerial work vehicle according to a fifth aspect is the aerial work vehicle according to any one of the first to fourth aspects, wherein the part on the free end side of the second lifting boom is predetermined in the horizontal direction. A hinge structure that can be folded by rotating the angle is provided.

The following actions are obtained by the above means. First, by making the moving vehicle a small truck or a light truck of less than 2 tons, it is possible to enter a narrow road and work at a high place in a narrow work space.
Further, during the lifting operation of the lifting boom device, the first lifting boom and the second lifting boom, which are rotatably connected by one lifting cylinder, can be moved up and down at the same time, and the structure becomes simple. Can be reduced in size and weight and the number of parts can be reduced.

Further, since the lifting cylinder is connected near the center of gravity of the second lifting boom, the first lifting boom and the second lifting boom can be lifted and lowered in a stable posture without breaking the balance.
Further, since the lifting cylinder is directly connected to the second lifting boom connected to the free end side of the first lifting boom without being interfered with the first lifting boom, a plurality of lifting cylinders, Even if a complicated link mechanism or the like is not used, the lifting rod can be raised to a height sufficient for work and lowered to the original position.

In addition, since the outrigger provided at least in front of the body frame is a swing arm type outrigger, it is possible to install the outrigger without interfering with the lifting boom device, which effectively uses the installation space of the narrow body frame. Can be planned.
In addition, when the swing arm type outrigger is constituted by a swing arm that swings around a rotation pin and a jack device provided at the free end of the swing arm, the structure of the outrigger is simplified, and the swing is further improved. If the arm swing angle is set to be 100 ° or more, the distance between the ground contact points of the front and rear outriggers will be widened. The safety of work can be improved by preventing the vehicle from overturning.

  In addition, when a guide member that is vertically extendable and has a free end that is pivotally connected to the second lifting boom is provided on the body frame in the vicinity of the support post, the first lifting during the lifting operation and the extension is performed. The postures of the boom and the second lifting boom are stabilized, and the lifting and lowering boom device is smoothly lifted and the tilting of the first lifting boom and the second lifting boom and the twist caused by the tilting are prevented.

In addition, when a boom receiving column that supports the second lifting boom is provided in the retracted state in which the first lifting boom and the second lifting boom are folded horizontally with respect to the vehicle body frame, The postures of the first lifting boom and the second lifting boom are stabilized, and the safety of the aerial work vehicle during traveling is improved.
In addition, when a hinge structure that can be folded by rotating the part by a predetermined angle in the horizontal direction is provided at the part on the free end side of the second lifting boom, it is connected to the free end side of the second lifting boom. It is possible to store the lifting / lowering rod compactly without protruding from the body frame.

According to the aerial work vehicle of the present invention, by adopting a small mobile vehicle, it is possible to provide an inexpensive and compact aerial work vehicle that has a small turn and has both workability and traveling performance.
In addition, the lifting boom device can be reduced in size and weight and the operation stability of the lifting boom device can be improved by simplifying the structure of the lifting boom device and reducing the number of parts.
In addition, the adoption of swing-arm type outriggers allows for an unreasonable layout of outriggers and improves safety at work in high places.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows embodiment of this invention, and is a side view which shows the state at the time of height work of an aerial work vehicle. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows embodiment of this invention, and is a top view which shows the state at the time of height work of an aerial work vehicle. It is a figure which shows embodiment of this invention, and is a side view which shows the state at the time of storage of an aerial work vehicle. It is a figure which shows embodiment of this invention, and is a top view which shows the state at the time of storage of an aerial work vehicle. It is a figure which shows embodiment of this invention, and is a rear view which shows the state at the time of storage of an aerial work vehicle. It is a figure which shows embodiment of this invention, and is sectional drawing which shows a swing arm type outrigger. It is a figure which shows embodiment of this invention, and is a top view which shows a swing arm type outrigger. It is a figure which shows embodiment of this invention, and is a sectional side view which shows a slide arm type outrigger. It is a figure which shows embodiment of this invention, and is a top view which shows a slide arm type outrigger. It is a figure which shows embodiment of this invention, and is a side view which shows the state at the time of storage of a raising / lowering boom apparatus. It is a figure which shows embodiment of this invention, and is a top view which shows the state at the time of storage of a raising / lowering boom apparatus. It is a figure which shows embodiment of this invention, and is a plane sectional view which shows a 1st raising / lowering boom.

Hereinafter, an embodiment for carrying out the present invention will be described by taking the embodiment shown in FIGS. 1 to 12 as an example.
The aerial work vehicle 1 of the present invention includes a moving vehicle 3, a lifting boom device 5 mounted on the moving vehicle 3, an outrigger 15 that holds the posture of the moving vehicle 3 during use of the lifting boom device 5, 16. And in this Embodiment, the moving vehicle 3 is comprised by the light four-wheeled vehicle which removed the loading platform of the light truck.

The moving vehicle 3 includes a driver seat 7 provided in front and a vehicle body frame 9 provided behind the driver seat 7. A front wheel 11 is provided below the driver seat 7, and a rear wheel 13 is provided below the vehicle frame 9. Two are provided.
Further, slide arm type outriggers 15 and 15 described later are provided at the left and right corner portions of the vehicle body frame 9, and swing arm type outriggers 16 and 16 described later are provided at the front left and right corner portions of the vehicle body frame 9. Is provided, and the posture of the aerial work vehicle 1 is stabilized by grounding the jack devices 109 of all the outriggers 15, 15, 16, and 16 to the ground GL at the time of working at a high place.

  The lifting boom device 5 includes a support post 25 raised upward from the vehicle body frame 9 at the rear of the driver's seat, and a base end centered on a first rotation fulcrum 27 with respect to the upper end portion of the support post 25. The first lifting boom 29 is pivotally connected to the first lifting boom 29, and the base end is pivotally connected to the free end of the first lifting boom 29 about the second pivot 31. The second elevating boom 33, the elevating rod 35 connected in a state of maintaining a horizontal posture on the free end side of the second elevating boom 33, and the first elevating boom 29 without interfering with the first elevating boom 29. (2) Basically, it comprises a lifting cylinder 37 provided between the vicinity of the center of gravity of the lifting boom 33 and the lower end of the support post 25.

A rectangular frame-shaped support frame 39 is integrally provided at the upper end portion of the support post 25, and a first rotation with a base end portion of a first lifting boom 29 described later is provided on the lower surface of the support frame 39. A bracket 41 to which a bearing portion (not shown) that fits with a shaft portion constituting the fulcrum 27 is attached is provided.
The support frame 39 has a role of supporting the first lifting boom 29 during storage and maintaining the horizontal posture of the first lifting boom 29.

The body frame 9 is provided with a boom receiving column 121 that supports the second lifting boom 29 in a retracted state in which the first lifting boom 29 and the second lifting boom 33 are folded horizontally.
The boom receiving column 121, together with the support frame 39, supports the first elevating boom 29 and the second elevating boom 33 in the retracted state to maintain safety when the aerial work vehicle 1 is traveling.

Further, a support disc 20 that rotates at a predetermined turning angle α around the turning shaft 18 is integrally provided at the lower end portion of the support post 25. It is designed to be swiveled. Further, in the present embodiment, the support disk 20 is configured to be able to turn at a turning angle α of 320 ° in total by 160 ° left and right.
The swivel mechanism 19 has a mechanism as shown in FIG. 10 as an example. In the illustrated embodiment, the rotating shaft 17 disposed in the vertical direction and the drive gear that rotates integrally with the rotating shaft 17 are provided. 21, a driven gear 23 that meshes with the drive gear 21 and rotates integrally with the support disk 20, and an electric motor or hydraulic motor (not shown) that transmits a rotational force to the rotary shaft 17. .

  The support disc 20 is provided with a bracket 43, and a base end portion of the cylinder body 45 of the elevating cylinder 37 is connected to the bracket 43 so as to be rotatable. The elevating cylinder 37 is constituted by a hydraulic cylinder having an expansion / contraction stroke of about 1.6 m as an example, and the tip of the cylinder rod 61 protruding from the cylinder body 45 is provided on the lower surface of the second elevating boom 33 described later. The bracket 59 is connected to the bracket 59 so as to be rotatable.

  Further, a guide member 47 is raised on the support disk 20 so as to be extendable in the vertical direction. The guide member 47 is configured as an example by a plurality of nested slide elements 47a and 47a that slide in the vertical direction, and the upper end of the uppermost slide element 47a is provided on the lower surface of the second lifting boom 33 described later. The other bracket 60 is rotatably connected.

As an example, the first lifting boom 29 is configured by a long member having a concave-shaped cross section with an open upper surface, and a connection point with the upper end portion of the support post 25 described above on the left and right sides of the lower surface of the base end portion. A bearing portion 49 that fits with a shaft portion that constitutes the first rotation fulcrum 27 and a bracket 51 for mounting the bearing portion 49 are provided.
Further, on the left and right of the upper surface of the free end portion of the first lifting boom 29, it is fitted with a shaft portion that constitutes a second rotation fulcrum 31 that is a connection point with the base end portion of the second lifting boom 33 described below. A bearing portion 53 and a bracket 55 for attaching the bearing portion 53 are provided.

In addition, an elongated hole-like opening 57 having one end extending along the boom longitudinal direction is provided on the lower surface of the first lifting boom 29. The opening 57 can receive the lifting cylinder 37, the guide member 47, and the two brackets 59 and 60 attached to the lower surface of the second lifting boom 33 in a penetrating state. Yes.
Further, the second elevating boom 33 described below enters the recessed portion 63 on the upper surface side of the first elevating boom 29 in the state shown in FIG. Has come to be supported.

The second elevating boom 33 is a rectangular pipe-like member that is longer than the first elevating boom 29, and is composed of two types of members having different diameters of the outer cylinder 69 and the inner cylinder 71 combined in a nested manner.
And the bearing parts 73 and 73 are provided in the both sides | surfaces in the base end part of the outer cylinder 69, These bearing parts 73 and 73 and the bearing part provided in the free end part of the 1st raising / lowering boom 29 mentioned above. The shaft part which comprises the 2nd rotation fulcrum 31 is inserted by using 53,53.
In addition, the bracket 59 for connecting the lifting cylinder 37 and the bracket 60 for connecting the guide member 47 are attached to the lower surface of the outer cylinder 69 near the center of gravity.

An extension cylinder 75 is disposed at the center of the outer cylinder 69, and a base end portion of the cylinder body 77 of the extension cylinder 75 is connected to a portion near the base end of the outer cylinder 69. The rod end at the tip 79 is connected to the inner wall surface of the inner cylinder 71 near the free end.
Further, a folding portion 81 is provided at a free end side portion of the inner cylinder 71, and the folding portion 81 can be folded by being rotated about 150 ° in the horizontal direction via a hinge structure 83. ing.

The hinge structure 83 is configured by including a hinge part 85 that rotatably connects the inner cylinder 71 and the folding part 81, and a lock means 87 for locking the extended state of the inner cylinder 71 and the folding part 81. A hinge structure 93 is also provided between the elevating rod 35 and the folding portion 81 described below.
The elevating rod 35 is a vertically long rectangular bucket-shaped member that moves up and down with a worker who performs work at a high place. The depth of the elevating rod 35 is formed at a deep bottom so that at least the lower half of the worker can be covered with the worker placed thereon, thereby preventing the worker from falling.

In addition, as an example of the lifting rod 35, an operation box 97 is attached to the front edge portion, and an operator operates the appropriate operation lever of the operation box 97 while riding on the lifting rod 35. The height of the heel 35 from the ground GL and the movement of the work position can be performed.
An angle adjusting cylinder 101 is provided between the lifting rod 35 and the folding portion 81 to keep the lifting rod 35 in a horizontal posture regardless of changes in the inclination angles of the first lifting boom 29 and the second lifting boom 33. It is installed.
The stroke of the cylinder rod 103 in the angle adjusting cylinder 101 is configured to automatically change in conjunction with the stroke of the cylinder rod 61 in the lift cylinder 37 described above.

Swing arm type outriggers 16 and 16 are provided at the left and right front corners of the body frame 9. The swing arm type outrigger 16 includes a swing arm 107 whose base end is pivotally connected to the vehicle body frame 9 by a rotation pin 105 and swings at a predetermined swing angle θ in the horizontal direction, and the swing arm 107. It is comprised by providing the hydraulic-type jack apparatus 109 as an example which is provided in the free end of this and expands-contracts in a perpendicular direction.
The swing angle θ of the swing arm 107 is between the retracted posture in which the swing arm 107 is rotated in the direction closest to the vehicle body frame 9 and the extended posture in which the swing arm 107 is rotated in the direction farthest from the vehicle body frame 9. It is set to be 100 ° or more. Incidentally, in the present embodiment, the swing angle θ is set by the limit switches 111 and 113, and as an example, the swing angle θ is set to about 110 °.
In this case, the distance between the ground contact points of the front and rear outriggers is widened, so that the attitude of the aerial work vehicle is stabilized when the lifting boom device is used, and the aerial work vehicle is prevented from overturning to improve work safety. Can be increased.
In the above case, in the state where the swing arm 107 is in the extended position, the jack device 109 at the tip of the swing arm 107 faces the side position of the passenger door of the driver's seat 7, and the passenger door cannot be opened and closed. If the swing arm 107 is moved to the retracted position side, the passenger door can be opened and closed.

Also, slide arm type outriggers 15 and 15 are provided at the left and right corner portions of the body frame 9. The slide arm type outrigger 15 protrudes and protrudes from the side end surface of the body frame 9 and extends a predetermined stroke toward the outside in the horizontal direction, and is provided at a free end of the slide arm 115 and expands and contracts in the vertical direction. As an example, a hydraulic jack device 109 is provided.
In addition, the outriggers 15, 15, 16, 16 on the front, rear, left and right of the vehicle body frame 9 are provided with an in-line check valve 117 in the jack device 109. Based on the in-line check valve 117, a jack interlock device (not shown) The boom interlock device is activated to prevent the moving vehicle 3 from overturning.

The jack interlock device is a device that locks the lifting boom device 5 so that it cannot be operated when the jack devices 109 of the outriggers 15, 15, 16, 16 are not in contact with the ground GL.
Further, the boom interlock device can be used even if the jack devices 109 of the outriggers 15, 15, 16 and 16 are erroneously operated while the first lifting boom 29 and the second lifting boom 33 are raised. It is a device that locks 109 so as not to operate.

Further, an emergency escape push button switch (not shown) is provided in the lift rod 35, and when the emergency escape push button switch is pressed when an emergency situation occurs during work at a high place, the lift rod 35 is being lifted. Is descended by its own weight.
In addition, a box-shaped boarding step 119 that also serves as a device cover is provided at the rear of the body frame 9, and is configured to function as a stepping board when an operator gets on the lifting / lowering rod 35.

Next, the operation of the aerial work vehicle 1 of the present invention configured as described above will be described separately for (1) during a high-altitude work and (2) during storage.
(1) When working at heights (see Figures 1 and 2)
Prior to work at a high place, the mobile vehicle 3 is fixed and the lifting boom device 5 is prepared for operation. First, the moving vehicle 3 is stopped at the working position, and the swing arm 107 in the swing arm type outrigger 16 in front of the body frame 9 is manually rotated to change from the retracted position to the extended position. In the state where the swing arm 107 is in the extended position, the jack device 109 at the tip of the swing arm 107 faces the side position of the entrance door of the driver's seat 7 and contributes to an increase in the distance between the ground contact points of the front and rear outriggers 15 and 16. is doing.

Next, the slide arm 115 of the slide arm type outrigger 15 at the rear of the vehicle body frame 9 is pulled out to the side to be in an extended posture. Then, the jack devices 109 of the front and rear outriggers 15 and 16 are driven to be in a grounded state, and the moving vehicle 3 is fixed.
Next, as shown in FIG. 5, the folded portion 81 in the folded state at the tip of the first lifting boom 29 is rotated in the extending direction around the hinge portion 85, and the tip of the first lifting boom 29 is locked by the locking means 87. To fix.

After the completion of such preparatory work, the operator gets in the elevator rod 35 with the necessary tools and materials and using the boarding step 119 as a stepping board. Then, an appropriate operation lever in the operation box 97 is operated to extend the elevating cylinder 37.
At this time, as described above, the stroke of the cylinder rod 103 of the angle adjusting cylinder 101 automatically changes in conjunction with the stroke of the cylinder rod 61 of the lifting cylinder 37, so that the work on the lifting rod 35 and the lifting rod 35 is carried out. The person's posture remains horizontal.

As the lifting cylinder 37 extends, the second lifting boom 33 is pushed upward, and the slide element 47a of the guide member 47 also moves upward. As the second lifting boom 33 moves upward, the first lifting boom 29 connected to the second lifting boom 33 also moves upward.
At this time, the lifting cylinder 37 is connected to the vicinity of the center of gravity of the second lifting boom 33 and is guided in the vertical direction by the guide member 47, so that the first lifting boom 29 and the second lifting boom 33 lose balance. And move upward in a stable posture.

Then, the lift cylinder 37 is not interfered with the first lift boom 29 by the opening 57 provided in the first lift boom 29, and the second lift is connected to the free end side of the first lift boom 29. Since the force can be directly transmitted to the boom 33, the elevating rod 35 can be raised to a desired working position without using a plurality of elevating cylinders or a complicated link mechanism. ing.
Further, when it is desired to further move the elevating rod 35 to a high place, the extension cylinder 75 is operated to extend the inner cylinder 71 by a desired stroke.

(2) When stored (see FIGS. 3, 4, and 5)
On the other hand, at the time of storage, the operator operates an appropriate operation lever of the operation box 97 to bring the lifting cylinder 37 into a contracted state. At this time, the lifting rod 35 and the operator's posture in the lifting rod 35 remain in a horizontal posture due to the action of the angle adjusting cylinder 101 interlocked with the movement of the lifting cylinder 37 described above.
As the lifting cylinder 37 contracts, the first lifting boom 29 and the second lifting boom 33 move downward while tilting, and finally, as shown in FIGS. The two elevating booms 29 and 33 are accommodated in the recess 63 of the elevating boom 29 and are supported horizontally in a state where they overlap each other as shown in the figure.

Further, since the first lifting boom 29 and the second lifting boom 33 in the horizontal posture are supported by the support frame 39 and the boom receiving column 121, the lifting rod 35, the first lifting boom 29, and the second lifting boom during transportation. 33 does not shake.
Further, as shown in FIG. 4, the locked state by the locking means 87 of the hinge structure 83 is released, and the folding portion 81 is rotated to be in the folded state.

Next, the jack devices 109 of the front and rear outriggers 15 and 16 are operated to be in a contracted state, and the legs of the jack devices 109 that have been in contact with the ground GL are pulled upward. Then, the slide arm 115 of the slide arm type outrigger 15 is pushed into the vehicle body frame 9, and the swing arm 107 of the swing arm type outrigger 16 is rotated to a retracted posture along the side surface of the vehicle body frame 9. In this case, since the jack device 109 at the tip of the swing arm 107 has moved away from the side position of the passenger door of the driver's seat 7, the passenger door can be opened and closed.
Thereafter, the aerial work vehicle 1 is moved to the next work location, or the aerial work vehicle 1 is moved to the storage location and stored. As shown in FIGS. 3 and 4, the lifting boom device 5 in the retracted state as described above is extremely compact and facilitates the movement of the aerial work vehicle 1, and the storage space and the installation space for the aerial work vehicle 1. It is possible to cope with the narrowing of.

As described above, according to the present embodiment, the following effects can be obtained.
First, by making the moving vehicle 3 a small truck or light truck of less than 2 tons, it is possible to enter a narrow road and work at a high place in a narrow work space.
Further, through the simplification of the structure of the lifting boom device 5 and the reduction in the number of parts, the traveling boom device 5 can be reduced in size and weight, and the operation stability of the lifting boom device 5 can be improved.
In addition, since the outrigger provided at least in front of the vehicle body frame 9 is a swing arm type outrigger 16, the outrigger can be installed without interfering with the lifting boom device 5, and the installation space for the narrow vehicle body frame 9 can be reduced. Can be used effectively. Further, by adopting the swing arm type outrigger 16, the distance between the contact points of the front and rear outriggers 15, 16 can be set wider than the length of the vehicle body frame 9, so that the moving vehicle 3 can be reliably fixed to the ground GL. .

The aerial work vehicle 1 of the present invention is not limited to that of the above-described embodiment, and the design can be changed within the gist of the invention. For example, all of the front, rear, left and right outriggers can be made into swing arm type outriggers 16, and the number of outriggers can be increased so that the moving vehicle 3 can be more firmly fixed to the ground GL. .
The swing angle θ of the swing arm 107 of the swing arm type outrigger 16 can be variously changed in the range of 90 ° to 180 °.
Further, the structure of the turning mechanism 19 is not limited to the structure shown in the above-described embodiment, and various structures such as those using a hydraulic cylinder, a piston / crank, or a rack / pinion mechanism can be adopted.

  The high-altitude work vehicle of the present invention can be used at work sites where high-altitude work is performed, such as wire and telephone line overhead construction, especially with a simple structure and a small number of parts, lightweight, compact, stable and easy to operate. It has applicability when it is desired to provide an excellent aerial work vehicle.

DESCRIPTION OF SYMBOLS 1 High-altitude work vehicle 3 Moving vehicle 5 Lifting boom apparatus 7 Driver's seat 9 Body frame 11 Front wheel 13 Rear wheel 15 Slide arm type outrigger 16 Swing arm type outrigger 17 Rotating shaft 18 Rotating shaft 19 Rotating mechanism 20 Support disk 21 Drive Gear 23 driven gear 25 support post 27 first pivot fulcrum 29 first lift boom 31 second pivot fulcrum 33 second lift boom 35 lift rod 37 lift cylinder 39 support frame 41 bracket 43 bracket 45 cylinder body 47 guide member 47a slide Element 49 Bearing portion 51 Bracket 53 Bearing portion 55 Bracket 57 Opening portion 59 Bracket 60 Bracket 61 Cylinder rod 63 Recess 69 Outer cylinder 71 Inner cylinder 73 Bearing portion 75 Extension cylinder 77 Cylinder body 79 Cylinder rod 81 Folding portion 83 Hinge structure 85 Hinge Portion 87 Locking means 93 Hinge structure 97 Operation box 101 Angle adjustment cylinder 103 Cylinder rod 105 Rotating pin 107 Swing arm 109 Jack device 111 Limit switch 113 Limit switch 115 Slide arm 117 Inline check valve 119 Boarding step 121 Boom receiving column GL Ground α Swing angle θ Swing angle

Claims (5)

A self-propelled mobile vehicle having a driver's seat and a body frame, a lifting boom device mounted on the moving vehicle, and an outrigger that holds the posture of the moving vehicle during use of the lifting boom device. In the work vehicle,
The moving vehicle is a small truck or light truck of less than 2 tons,
The lifting boom device is a support post that is raised upward from the body frame at the rear of the driver's seat;
A first lifting boom whose base end is pivotally connected to the upper end of the support post;
A second lifting boom having a base end pivotably connected to a free end of the first lifting boom;
A lifting rod connected in a state of maintaining a horizontal posture on the free end side of the second lifting boom;
A lifting cylinder provided between the vicinity of the center of gravity of the second lifting boom and the lower end of the support post in a state not interfering with the first lifting boom;
The outrigger is provided at the front, rear, left and right of the vehicle body frame, and at least the outrigger provided in front of the vehicle body frame is a swing arm type outrigger. The swing arm type outrigger is a swing arm that has a base end pivotally connected to a body frame by a pivot pin and swings a predetermined angle in the horizontal direction, and is provided at a free end of the swing arm in a vertical direction. Equipped with a telescopic jack device,
The swing angle of the swing arm is 100 ° or more between a retracted posture in which the swing arm is rotated in the direction closest to the body frame and an extended posture in which the swing arm is rotated in the direction farthest from the body frame. The aerial work vehicle according to claim 1, wherein   On the vehicle body frame near the support post, a guide member is raised up and down in a vertical direction so that the free end of the guide member is rotatably connected to the second lifting boom. The aerial work vehicle according to claim 1, wherein the aerial work vehicle is provided.   4. The vehicle body frame is provided with a boom receiving column for supporting the second lifting boom in a retracted state in which the first lifting boom and the second lifting boom are folded horizontally. An aerial work vehicle described in any one of the above.   5. The hinge structure that can be folded by rotating the part by a predetermined angle in the horizontal direction is provided at a part on the free end side of the second lifting boom. The aerial work vehicle described in 1.

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