JPH07291023A - Roof step of vehicle for elevated spot working vehicle - Google Patents

Abstract

PURPOSE:To obtain a roof step for an elevated spot working vehicle, by which riding onto a working stand positioned on an operation cabin of the elevated spot working vehicle can be easily performed. CONSTITUTION:A front sub-frame is installed in front of a roof step 20, and a support plate is formed according to the form of a rain gutter 18 so that the load applied to the front sub-frame can be received by the bent part (round part) including a horizontal part of the rain gutter 18. A support pipe 23 is fixed between the front sub-frame and the front of the support plate. Accordingly, even if the overhung from the horizontal part of the rain gutter 18 is large, the roof step 20 can be firmly fixed, and even if load is applied to the forward end part of the front sub-frame, the front sub-frame will not be bent.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roof step of an aerial work vehicle used by an operator to ride on a workbench stored in a driving cabin of the aerial work vehicle.

[0002]

2. Description of the Related Art When performing work at high places outdoors, such as wiring work on electric poles, a boom that can be freely extended, retracted, swung, etc. is provided on the vehicle body, and work is performed at the tip of this boom. Aerial work vehicles configured with a base are often used. Then, by performing operations such as extension and raising of the boom, it is possible to move an operator on the workbench to a desired height and perform work at height. Then, when the vehicle is stopped or running, the boom is contracted and laid down to improve the stability of the vehicle body. Here, depending on the aerial work vehicle, a swivel platform that pivots the boom up and down and swings is disposed behind the vehicle body, and the work platform is located above the operating cabin when the boom is stored. There is something.

[0003] In such an aerial work vehicle, when an operator gets on the work table prior to the work, as shown in FIG. 4, a ladder 16 disposed behind the driving cabin 15 is used.
Climb up to get on the roof step 40 arranged above the driving cabin 15 and get on the workbench 14. Here, since an aerial work vehicle is often manufactured by modifying a vehicle such as a commercially available truck, the roof step 40 on the driving cabin 15 is not provided at the time of manufacturing the vehicle, It will be added later when it is modified as a work vehicle.

Usually, a rain gutter 18 is formed around the door 15a of the driving cabin 15 in a vehicle such as a truck along the outer shape of the door 15a. Therefore, when the roof step 40 is attached later, the roof step 40 is often attached using the rain gutter. The roof step 40 is composed of a frame part 41 stretched with a wire mesh so that an operator can ride on it, and a support part 42 supporting the frame part 41, and a support plate provided at the lower end part of the support part 42. The mounting bracket 43 holds the horizontal portion of the rain grate 18 above the door 15a and places it on the operating cabin 15.

[0005]

When an operator rides on the workbench 14, it is desirable that the roof step 40 be located up to the side surface of the workbench 14. However, the allowable load of the rain trough 18 and the roof step 40 and the rain trough 1 when an operator rides on the roof step 40.
Considering the moment acting on the attachment portion with 8, it is not possible to extend the front end portion of the roof step 40 too much (the overhang is large). For this reason, when the position of the workbench 14 in the retracted state of the boom 13 is located in front of the driving cabin 15, even if the worker rides on the tip portion I of the roof step 40, the workbench 14 is placed right beside the workbench 14. There is a problem that it is difficult to get on and off the workbench 14 because it does not reach.

The present invention has been made in view of the above problems, and it is a roof step of an aerial work vehicle that can easily get on a workbench located on a driving cabin of the aerial work vehicle. Is intended to provide.

[0007]

In order to achieve the above object, the roof step of an aerial work vehicle according to the present invention is provided when the work platform provided on the boom is in a retracted state in which the work platform is stored on the operating cabin. In an aerial work vehicle configured to be positioned in front of the driving cabin, at least a part of a frame member supported by a pair of left and right columns is formed to project forward of the driving cabin. And
A pair of left and right support plates detachably attached to the rain trough according to the shape of the rain trough extending from the rear to the front lower of the driving cabin and provided on both sides of the driving cabin from the horizontal part to the front bent part. Are fixed to the frame member by the columns. Further, the front end of the roof step and the support plate are fixed by a support pipe that extends from the front of at least one of the support plates toward the front end of the frame member in the front upper direction.

[0008]

According to the roof step of such an aerial work vehicle, in the roof step formed by projecting the front end portion from the driving cabin, the load acting on the roof step is received at the horizontal part and the front bent part of the rain gutter. Therefore, a large load can be applied to the frame portion protruding forward from the support column. Further, when a load is applied to the projecting frame part, the projecting frame part is bent because the supporting pipe fixed between the projecting frame part and the support plate receives the load applied to the projecting frame part. Never.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. First, an aerial work vehicle 10 provided with a roof step for an aerial work vehicle according to the present invention will be described with reference to FIG. This aerial work vehicle 10 is provided with a swivel base 12 which can be swiveled at the rear of a vehicle body 11 which can travel freely, and a boom 1 which is configured to be extendable and retractable above the swivel base 12.
3 is pivotally attached so that it can be lifted and lowered. A work table 14 on which an operator can board is attached to the tip of the boom 13. Then, the worker gets on the work table 14 and operates the swivel base 12 and the boom 13 to move to an arbitrary high place and perform work.

After the work is finished, the boom 13 is placed on the boom receiver 17 by operating the boom 13 such as falling down and contraction, and the workbench 14 is operated by the operating cabin 15.
Boom 1 is in the retracted position and is in the retracted position above the boom.
Perform the storage operation of 3. Here, the operator gets on and off the work table 14 when the work table 14 is at the storage position. For example, when an operator boards the workbench 14, first, he climbs up the ladder 16 disposed behind the driving cabin 15 to move to the vicinity of the roof of the driving cabin 15, and then rides on the roof step 20 to work on the workbench 14. To the side (in front of the roof step 20) and board the workbench 14.

Next, the structure of the roof step 20 and its attachment to the operating cabin 15 will be described with reference to FIGS. 1 and 2. The roof step 20 includes a main frame 21 formed by bending a pipe, sub-frames 21 a and 21 b provided on the left side of the main frame 21 so as to project in the front-rear direction, left-side columns 22 and 22 supporting the main frame 21, and It is composed of the right side columns 26, 26.

A support plate 24 is fixed to the lower ends of the left columns 22 and 22. This support plate 24 is
It is formed with a thickness that can be inserted into the rain gutter 18 and
The front end portion thereof is formed in a "V" shape that is bent downward in accordance with the shape of the rain grate 18. And the left support 2
The lower ends of the reference numerals 2 and 22 are fixed to the horizontal portion of the support plate 24. Furthermore, the front part 24 of the support plate 24
One end of the support pipe 23 is fixed to a. The other end of the support pipe 23 is connected to the front subframe 21a.
It is fixed to the front end of the.

A screw hole 24b is formed on the side surface of the support plate 24 in the horizontal portion, and the mounting bracket 25 is mounted by the mounting screw 29 in a state where the support plate 24 is fitted into the rain trough 18. As a result, the rain trough 18 is sandwiched between the support plate 24 and the mounting bracket 25, and the roof step 20 can be attached to the rain trough 18. A supporting plate similar to the above is fixed to the lower end portions of the right side columns 26, 26, so that the roof step 20 can be firmly attached to the rain grate 18 on both sides of the operating cabin 15. Further, a wire net 27 or a board 28 is attached to the main frame 21 and the sub-frames 21a and 21b so that an operator can easily walk on the roof step 20.

The operation cabin 1 configured as described above
When using the roof step 20 mounted on the vehicle 5 to get on and off the work platform 14 in the storage position, the worker can stand at the position II on the wire net 27 attached to the front sub-frame 21a. . At this time, the load of the operator on the front sub-frame 21a is 1
Since the support plate 24 formed in conformity with the shape of 8 can receive a load not only in the horizontal part of the rain gutter 18 but also in the front bent part (R part), an overhang from the horizontal part of the rain gutter 18 is achieved. Even if it is large, the roof step 20 can be firmly fixed. Further, since the support pipe is fixed between the front sub-frame 21a and the front portion 24a of the support plate 24, the front sub-frame 21a does not bend even when an operator rides on the tip portion II of the front sub-frame 21a. There is no.

[0015]

As described above, in the roof step of the aerial work vehicle according to the present invention, the load applied to the front of the frame includes the horizontal portion of the rain gutter and the front bent portion formed on the side surface of the driving cabin. The support plate is formed in conformity with the shape of the rain gutter so that the load can be received even in. A support pipe is fixed between the front of the frame and the front of the support plate. Therefore, the roof step can be securely fixed even if the roof step is largely projected from the driving cabin, and the frame does not bend even if a load is applied to the tip portion of the frame.

[Brief description of drawings]

FIG. 1 is a plan view (A) and a side view (B) of a driving cabin of an aerial work vehicle including a roof step for an aerial work vehicle according to the present invention.

FIG. 2 is a perspective view of the operating cabin portion.

FIG. 3 is a side view of an aerial work vehicle including the roof step.

FIG. 4 is a plan view (A) and a side view (B) of a driving cabin section of a conventional work platform equipped with a roof step.

[Explanation of symbols] 10 work platform 11 vehicle body 12 swivel base 13 boom 14 work platform 20 roof step

Claims (1)

[Claims] 1. A vehicle body provided with a driving cabin in the front, a boom provided on the vehicle body for at least undulating operation, and a boom provided at the tip of the boom above the operating cabin in a retracted state. A roof step disposed on the operating cabin of an aerial work vehicle comprising a work platform projecting forward of the operating cabin, at least a part of which projects forward of the operating cabin. And a pair of left and right struts that support the frame member, and the struts are fixed to the upper part, and extend from the rear of the driving cabin to the front lower side and extend on both sides of the driving cabin. A pair of left and right support plates removably attached to the rain gutter according to the shape of the rain gutter provided on the surface from the horizontal part to the front bent part, One end is fixed to the front of at least one of the support plates, and the other end extending forward and upward toward the front end of the frame member is a support pipe fixed to the front end of the roof step. Roof steps for aerial work vehicles.