JPH04122587U - Work vehicle with telescopic boom - Google Patents

Abstract

(57) [Summary] [Purpose] The object of the present invention is to provide a work vehicle with a telescoping boom that can lower the height of the vehicle in a running position without shortening the length of the telescoping boom. [Configuration] Cut out the bottom surface of the base end of the telescopic boom 11,
This cutout surface 15 is brought close to the rear diagonally upper part of the driver's cab 2 of the vehicle 1 in the running position, and the telescopic boom 11
It is arranged so that the lower surface is lower than the upper position of the driver's cab 2, and the running posture of the work vehicle is lowered accordingly.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a work vehicle having a telescoping boom.

0002

[Conventional technology]

As a conventional work vehicle having this type of telescopic boom, there is an aerial work vehicle A shown in Fig. 3. will be explained below using an example. In FIG. 3, this aerial work vehicle A has a driver's cab 2 of a vehicle 1. A telescopic boom 4 is attached to a swivel base 3 which is attached directly behind the swivel base so that it can be swiveled. I'm wearing it. This telescopic boom 4 includes a base boom 5, an intermediate boom 6, and an intermediate boom 6. The boom 7 is telescopically inserted in sequence. A hydraulic system is installed between each boom. By interposing an appropriate telescopic drive device such as a cylinder, and driving this telescopic drive device, the basic The intermediate boom 6 can be extended and retracted from the boom 5, and the boom 7 can be extended and retracted from the intermediate boom 6. The sea urchin is turning. A hydraulic cylinder 8 for luffing is installed between the base boom 5 and the rotating base 3. The telescopic boom 4 is raised and lowered by driving the hydraulic cylinder 8 for raising and lowering. It is now possible to do so. A bucket 9 for boarding the worker is installed at the tip of the front boom 7. By appropriately raising and lowering the telescopic boom 4, extending and contracting it, and rotating the swivel base 3, This bucket 9 can be positioned at any desired height to enable work at heights. Ru.

0003 The aerial work vehicle A configured in this way carries the telescopic boom 4 in the contracted state behind the vehicle 1. Rotate the swivel base 3 so that it points toward the The hoisting hydraulic cylinder 8 is contracted to lower the telescopic boom 4. The vehicle 1 is configured to take a running posture when the vehicle 1 is running. i.e. high places The height of the work vehicle is lowered, and the bucket 9 and telescopic boom 4 protrude from the rear end of the vehicle 1. It takes a running posture that would not be expected.

0004

[Problem that the idea aims to solve]

However, in the above-mentioned aerial work vehicle A, the bucket 9 is moved higher when working at height. It is desired that the telescopic boom 4 be made longer so that it can be positioned at the desired position, as shown in Fig. 3. In the driving position, the base end of the telescopic boom 4 is located diagonally above the rear of the driver's cab 2. The telescopic boom 4 was arranged so as to protrude up to . Therefore, it is inevitable There was a problem in that the height of the vehicle in the running position of the work vehicle became high. The present invention allows the working vehicle to adjust its running posture without shortening the length of the telescopic boom 4. The purpose is to provide a work vehicle with a telescopic boom that can lower the vehicle height. be.

[0005]

[Means to solve the problem]

In order to achieve the above objective, the work vehicle with the telescopic boom of the present invention is The telescopic boom is installed on a swivel platform that is installed directly behind the room changer so that it can be swiveled. Attach the retractable boom to the rear of the vehicle, with the distal end of the retractable boom facing toward the proximal end. The telescopic boom is configured to be folded down and stored so that it is lower than the telescopic boom. For work vehicles with In the driving position, it is placed facing and close to the rear diagonally upper part of the driver's cab of the vehicle. Even if the telescopic boom is raised from the The pivot points of the telescopic boom and the swivel base are determined so that they do not come into contact with the parts. It is a sign.

[0006]

[Effect]

The work vehicle having the telescopic boom of the present invention configured as described above runs on the cutout surface. The position is such that it is facing and close to the rear diagonally upper part of the driver's cab of the vehicle. Therefore, the lower surface of the telescopic boom can be placed at a lower position than the upper position of the operator's cab; The traveling posture of the telescopic boom can be lowered by that amount. Also, the upper surface of the base end of the telescopic boom is cut off. The length of the telescopic boom as well as its stroke will not be shortened. stomach. Therefore, the traveling posture of the aerial work vehicle can be adjusted without shortening the length of the telescopic boom. The vehicle height can be lowered.

[0007]

【Example】 An example of a work vehicle having a telescoping boom of the present invention will be explained below based on FIGS. 1 and 2. do. In addition, in explaining the working vehicle with the telescopic boom of the present invention, the conventional The case where this is applied to the aerial work vehicle A described in the technology section will be described below. B is for books An aerial work vehicle for explaining an embodiment of the invention, which is explained in terms of conventional technology The swivel base 3 and telescopic boom 4 are different from A, and other parts are the same. Ru. Therefore, reference numerals 1, 2, 8, and 9 explained in the prior art are as follows: The same reference numerals will be used in the description of the same items, and the description will be omitted.

[0008] Reference numeral 10 is a swivel base, which has a lower height than the swivel base 3 described in the conventional technology. I'm sleeping. 11 is a telescopic boom, and this telescopic boom 11 is a conventional technology. The only difference between the telescopic boom 4 explained in and the point that the bottom surface of the telescopic boom proximal side is cut out is that It's wrong.

[0009] Therefore, each boom base of the base boom 12, intermediate boom 13, and front boom 14 is The lower surface of the end side is cut out, and the lower surface of the base boom 11 is cut out. Make sure that the bottom surfaces of the intermediate boom 13 and the front boom 14 do not protrude beyond the surface 15. are doing.

0010 This cutout surface 15 is located diagonally above the rear of the driver's cab 2 of the vehicle 1 in the driving position. While facing and approaching the parts, the telescopic boom 11 is raised from the traveling position. Also, the cutout surface 15 is located diagonally above the rear of the driver's cab 2 of the vehicle 1 (the ceiling of the driver's cab 2). The pivot points 16 of the telescopic boom 11 and the swivel base 10 are determined so as not to contact the Ru. That is, centering on the pivot point 16 of the telescopic boom 11, the vehicle 1 The radius is the distance R to the rear diagonally upper part of the driver's cab 2 (the ceiling of the driver's cab 2). The lower surface of the base end side of the base boom 12 is cut out to fit within the circular arc. Ru. In particular, in the case of this embodiment, when raising the telescopic boom 11 from the traveling position, The rear diagonally upper part of the driver's cab 2 of the vehicle 1 (ceiling part of the driver's cab 2) and the notch The pivot point 16 of the telescopic boom 11 and the swivel base 10 is determined so that the distance from the rotating surface 15 is large. It is established.

[0011] Further, as shown in FIG. 2, the intermediate boom 13 inserted into the base boom 12 is A strip located inside the bottom side of the tip of the boom 12 and outside the top side of the base end of the intermediate boom 13. It is supported by the base boom 12 via ride plates 17 and 18. Similarly, the tip boom 14 inserted into the intermediate boom 13 is located under the tip of the intermediate boom 13. Slide plates 19 and 2 arranged inside the side surface and outside the upper side surface of the base end of the tip boom 14 0, and is supported by the intermediate boom 13 via the intermediate boom 13. Therefore, the base of each boom This is a place where the support of each boom will not be affected even if the bottom surface of the end side is cut out. The length of the telescopic boom 11 is not shortened, but the telescopic stroke of the telescopic boom 11 is shortened. There is no such thing.

0012 The aerial work vehicle B configured in this manner operates as follows. That is, the above The cutout surface 15 faces the diagonally upper rear portion of the driver's cab 2 of the vehicle 1 in the driving position. Since the boom 11 is located close to the The telescopic boom 11 can be placed at a lower position, and the traveling posture of the telescopic boom 11 can be changed accordingly. can be lowered. In addition, since the upper surface of the base end side of the telescopic boom 11 is not cut out, The length of the telescopic boom 11 and its stroke are not shortened. Therefore, Shin The height of the vehicle for aerial work in the running position can be lowered without shortening the length of the retractable boom 11. Can be done easily.

[0013] In the above embodiment, the lower surfaces of the intermediate boom 13 and the front boom 14 on the base end side are the base boom. The middle boom 13 and the front boom 14 should not protrude beyond the cutout surface 15 of the boom 12. The lower surface of each boom base end was also cut out, but the middle boom 13 and the front boom The length is such that the lower surface of the proximal end of the base boom 14 does not protrude beyond the cutout surface 15 of the base boom 12. If so, the base end side of the base boom 12 can be cut out without cutting out the lower surface of each boom base end side. It is sufficient to cut out only the lower surface.

[0014] In addition, although the above example describes the case where it was implemented on an aerial work vehicle, the telescopic boom was Of course, it can be applied to working vehicles such as cranes, digging and pole-erecting vehicles, etc. .

[0015] Furthermore, a vehicle such as the aerial work vehicle B of the above embodiment generally has the driver's cab 2 tilted forward. It is designed to perform maintenance on the engine, etc. Therefore, driver's cabin 2 The notch surface 15, which is arranged opposite to the rear diagonally upper part of the Even if the telescopic boom 11 is raised, the cutout surface 15 will not be exposed to the rear of the driver's cab 2 of the vehicle 1. In addition to preventing it from coming into contact with the upper part (ceiling part of driver's cab 2), Even if the vehicle 2 is tilted, the cutout surface 15 will not touch the rear diagonally upper portion of the driver's cab 2 of the vehicle 1. The pivot point of the telescopic boom 11 and the swivel base 10 so that they do not come into contact with each other (the ceiling part of the operator's cab 2) 16 as well as the notch surface 15 may be determined. If you do this, When maintaining the engine etc. by tilting the driver's cab 2, the cutout surface 1 5 does not come into contact with the rear diagonally upper part of the driver's cab 2 of the vehicle 1 (the ceiling part of the driver's cab 2). Therefore, it is necessary to rotate the swivel base 10 to direct the telescopic boom 11 in the other direction. You can eliminate the need.

[0016]

[Effect of the idea]

A work vehicle having a telescopic boom of the present invention configured and operated as described above has a telescopic boom. The height of the vehicle for aerial work can be lowered without shortening the length. It is highly effective.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram illustrating a case where the present invention is applied to an aerial work vehicle as an embodiment of the work vehicle having a telescoping boom.

FIG. 2 is an explanatory diagram illustrating a case where the telescopic boom of the aerial work vehicle shown in FIG. 1 is extended;

FIG. 3 is an explanatory diagram illustrating an example of an aerial work vehicle as an example of a conventional work vehicle having a telescoping boom.

[Explanation of symbols]

1 vehicle 2 Driver's cabin 10 Swivel base 11 Telescopic boom 15 Notch surface 16 Pivot point

Claims (1)

[Scope of utility model registration request] [Claim 1] A telescoping boom is mounted on a swivel base mounted immediately behind the driver's cab of the vehicle so as to be swingable,
In a work vehicle having a telescoping boom configured such that the telescoping boom in a contracted state is laid down at the rear of the vehicle so that the distal end side of the telescoping boom is lower than the base end side and is in a running position, the lower part of the proximal side of the telescoping boom The cutout surface faces and approaches the rear diagonally upper part of the driver's cab of the vehicle in the running position, and even when the telescopic boom is raised from the running position, the cutout surface remains in the driver's cab of the vehicle. 1. A work vehicle having a telescoping boom, characterized in that pivot points of the telescoping boom and the swivel base are determined so as not to contact the diagonally upper rear portion of the work vehicle.