JPH08245196A - Covering device of working vehicle - Google Patents

Abstract

PURPOSE: To enable a work unit to be covered and operated easily in a working vehicle. CONSTITUTION: This covering device 30 consists of a cover member 31 being set up along the side of a vehicle body 2, and a driving means moving this cover member 31 for opening or closing at an interval between a close position getting close to a side face of a work unit 10 provided on top of the car body and covering this side face and an open position separating from the side face of the work unit 10 and getting out of an operable range R1 of this work unit 10. In addition, this cover member 31 is composed of a main part 31a and a sub part 31b, and in this constitution, the sub part is so designed to be free of drawing and storage in terms of structure. In this connection, unless the cover member is situated in the open position, any operation of the work unit and the cover member interfering with each other is to be regulated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work vehicle provided with a work device (for example, a boom) on the upper surface of a vehicle body and an outrigger jack on the side surface of the vehicle body. The present invention relates to a cover ring device for covering up.

[0002]

2. Description of the Related Art As one of the above-mentioned work vehicles, there is an aerial work vehicle having a work device for high places on the upper surface of a vehicle body. The work implement for high places is composed of a swivel that horizontally swivels with respect to the vehicle body, a telescopic boom that is mounted on the upper part of the swivel so that it can be raised and lowered, and a work platform for mounting a worker mounted on the tip of the boom. To be done. By using the work device for high places configured as described above, the worker can efficiently perform power distribution work or the like on the upper part of the electric pole. In addition, an outrigger jack is often attached to a side surface of the vehicle body so as to project laterally from the vehicle body and support the vehicle body so as to lift the vehicle body with respect to the ground.

By the way, in recent years, various work vehicles are required to have beautiful appearance and smartness, and colors and shapes having an easy image tend to be adopted. For a work vehicle having a work device having a complicated structure like the work device for high places described above, it is desirable to perform a covering for covering most of the work device at least when the work is not performed, such as when traveling. ing.

[0004]

However, there is a problem that the labor burden on the operator is great if the operator covers the working device or removes it from the working device. Further, if the cover interferes with the operation of the work device or interferes with the work device and damages it, the original function of the work vehicle cannot be exerted.

The present invention has been made in view of the above problems, and it is possible to easily cover or operate a working device, and further, a cover that does not impair the function of a working vehicle. The purpose is to provide a ring device.

[0006]

In order to achieve the above object, a covering device of the present invention is provided with a cover member arranged along a side surface of a vehicle body and the cover member on the upper surface of the vehicle body. And a driving means for opening and closing between a closed position that approaches and closes the side surface of the working device and an open position that moves away from the side surface of the working device and goes out of the operable range of the working device. .

It is desirable to have a regulating means for regulating the operation of the work device and the cover member that interfere with each other unless the cover member is located at the open position. In addition, the cover member,
It is preferable that the main unit and the sub unit are configured so that the sub unit can be pulled out and stored in the main unit.

[0008]

According to the above-mentioned covering device, the cover member is opened and closed by the driving means, so that the burden on the operator is small. Then, if the cover member is moved to the closed position, the working device cannot be seen at least from the side of the vehicle body, and if the cover member is moved to the open position, the cover member does not interfere with the operation of the working device. . In addition,
By restricting the operation of the work device when the cover member is not in the open position by the restriction means, it is possible to reliably prevent interference between the work device and the cover member due to an erroneous operation or the like.

Further, when the cover member is moved from the closed position to the open position, the sub-part of the cover member is housed in the main part. For example, the outrigger jack is attached to the side surface of the vehicle body. Even in such a case, the cover member can be moved to the open position without interfering with the jack. On the other hand, in the cover member located at the closed position, by pulling out the sub portion with respect to the main portion, the entire side surface of the working device can be easily covered.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an aerial work vehicle equipped with a covering device according to the present invention. This aerial work vehicle 1 is configured with a truck as a base, and as shown in FIG. 1 (B), an aerial work device 10 is attached to an upper surface of a vehicle body 2. The working device 10 for high places includes a swivel base 11 mounted on the front part of the upper surface of the vehicle body 2.
And a boom 12 which is attached to the upper part of the swivel base 11 so as to be able to rise and fall, and a work table 13 which is attached to the tip of the boom 12 so as to swing horizontally. The swivel base 11 can freely swivel horizontally with respect to the vehicle body 2. The boom 12 is configured to be telescopically expandable and contractible, and is lifted and lowered by the expansion and contraction operation of a hydraulic hoisting cylinder 14 attached between the boom 12 and the swivel base 11. The workbench 13 uses a leveling device (not shown)
The boom 4 is held almost horizontally regardless of the up and down state.

An operator on the workbench 13 is shown in FIG.
As shown by the chain line in (B), the swivel base 11 and the boom 12 are operated by operating the operating device 15 attached to the work base 13.
And, each operation of the workbench 13 can be controlled and the workbench 13 can be moved to an arbitrary high place. In this way, the worker can perform high-altitude work such as power distribution work on the upper part of the electric pole. When work on high places is completed, the swivel base 11
Is rotated obliquely rearward (for example, left rearward) with respect to the vehicle body 2, the fully retracted boom 12 is laid down so that the lower surface of the workbench 13 is close to the rear part of the vehicle body 2, and the workbench 13 is further swung. Swing to the side opposite to the left-right direction of 4 (for example, right side). In this way, the working device 10 for high places is stored in the vehicle body 2.

In addition, on both sides of the body 2,
An outrigger jack 20 is attached. The outrigger jack 20 includes an outrigger beam 21 (see FIG. 2B) that can be extended / retracted toward the side of the vehicle body 2 and an outer post 22 vertically attached to the tip of the outrigger beam 21. And an inner post 23 inserted in the outer post 22 so as to be vertically expandable and contractible, and a ground plate 24 attached to the lower end of the inner post 23. The extension / retraction operation of the outrigger beam 21 and the expansion / contraction operation of the inner post 23 are driven by the expansion / contraction operation of a hydraulic cylinder (not shown).

When operating the working device 10 for high places,
First, the outrigger beam 21 is extended to an appropriate length, the inner post 23 is extended with respect to the outer post 22, and the ground plate 24 is grounded. After this ground contact, the inner post 23 is further extended so that the vehicle body 2 is lifted by a predetermined amount H from the ground. In this way, the vehicle body 2 is supported by the outrigger jack 20 with high stability. After the work is completed, as shown in FIG. 1 (A), the inner post 23 is fully retracted and the outrigger beam 21 is retracted, so that the outrigger jack 20 is stored in the recess 2a formed on the side surface of the vehicle body 2. To be done.

The cover ring device according to the present invention is attached to the side surface of the vehicle body 2. Hereinafter, this covering device will be described with reference to FIGS.
The cover ring device 30 includes a cover plate 31 arranged along the side surface of the vehicle body 2, a drive mechanism 33 for moving the cover plate 31 up and down, and a control unit 4.
0. The cover plate 31 is shown in FIG.
As will be described in detail, the main cover portion 31a is formed in a substantially rectangular plate shape, and the sub-cover portion 31b is provided at the rear portion of the main cover portion 31a.

The rear end of the upper end of the main cover portion 31a is obliquely cut so as to extend along the inclination of the boom 12 stored as described above, and the front end of the upper end is slightly inclined toward the inside of the vehicle body 2. . The sub cover portion 31b is
It is formed in a plate shape having a trapezoid laid sideways, and is manually stored in a storage slit 31c formed in a bag shape inside the main cover portion 31a and opening at the rear end of the main cover portion 31a. The drawer is free. In addition,
Sub cover portion 31b pulled out from the storage slit 31c
The upper end of is linearly connected to the rear side of the upper end of the main cover portion 31a.

As shown in FIG. 3 (A), the drive mechanism 33 includes a fixing member 34 extending vertically and fixed to the vehicle body 2,
A drive link 35 is attached to the upper end of the fixing member 34 so as to vertically pass through the side of the vehicle body 2, and is vertically attached to the lower end of the fixing member 34 so as to pass through the side of the vehicle body 2. And a support link 36. A hydraulic opening / closing cylinder 37 is attached to the lower portion of the fixing member 34 so as to be swingable right and left, and a rod of the opening / closing cylinder 37 is rotatably connected to a base end portion of a drive link 35. The tip of the drive link 35 has a main cover portion 31.
It is rotatably connected to an intermediate portion in the vertical direction on the back surface of a. The support link 36 is formed in a V shape, and its tip is rotatably connected to the lower portion on the back surface of the main cover portion 31a.

In the drive mechanism 33 constructed as described above,
By extending the opening / closing cylinder 37 to erect the drive link 35, the main cover portion 31a (cover plate 31) can be moved above the side end portion of the vehicle body 2 as shown in FIG. 3 (A). (Hereinafter, this position is referred to as a closed position). The main cover portion 31a includes the support link 3
It is supported by 6 standing upright without falling. Then, the opening / closing cylinder 37 is contracted to cause the drive link 35 to fall down, whereby the main cover portion 3
1a can be moved below the vehicle body 2 (hereinafter,
This position is called the open position). Here, the main cover part 31a when moving from the closed position to the open position draws an arcuate locus that bulges toward the side of the vehicle body 2 as shown by the arrow in FIG. Even when the cover plate 31 moves from the closed position to the open position, the cover plate 31 is supported by the support link 36 in a straight standing state without falling.

As shown in FIG. 4, the control unit 40 includes an open / close switch 41 and a sub-cover storage sensor 4.
2, a jack support sensor 43, a hydraulic valve 44,
Open / close controller (regulating means) 45 and open position sensor 4
6 and a work controller 47.

The open / close switch 41 is attached to the rear portion of the vehicle body 2 as shown in FIG. This open / close switch 4
1 has two push buttons, an open button and a close button, and when each button is operated, it outputs an operation signal (open operation signal or close operation signal) according to the operated button.

As shown in FIG. 2, the sub-cover storage sensor 42 has a storage slit 31 in the cover plate 31.
It consists of a limit switch provided in c. The storage sensor 42 is pressed by the sub-cover portion 31b stored in the storage slit 31c to turn on, and outputs a storage detection signal.

As shown in FIG. 1 (B), the jack support sensor 43 includes an outrigger jack 20 (outer post 4).
3) It consists of an extension amount sensor attached to. The support sensor 43 is turned on when the inner post 22 extends by a preset amount with respect to the outer post 21 (when the vehicle body 2 is lifted from the ground by a predetermined amount H), and outputs a support detection signal. .

The hydraulic valve 44 is an electromagnetic switching valve, and controls the supply / discharge of hydraulic oil to / from the open / close cylinder 37 in accordance with an excitation signal received from an open / close controller 44 described later.
Specifically, when the opening operation excitation signal is received from the opening / closing controller 44, the operating oil is supplied to the rod side oil chamber of the opening / closing cylinder 37 and the operating oil is discharged from the bottom side oil chamber. On the other hand, when the closing operation exciting signal is received from the opening / closing controller 44, the working oil is supplied to the bottom side oil chamber of the opening / closing cylinder 37 and is discharged from the rod side oil chamber.

The open / close controller 45 is limited to the case where both the storage detection signal and the support detection signal are input.
An excitation signal for opening operation is sent to the hydraulic valve 44 based on the opening operation signal input from the opening / closing switch 41. Also,
When a closing operation signal is input from the open / close switch 41,
An excitation signal for closing operation is sent to the hydraulic valve 44.

The open position sensor 46, as shown in FIG.
The drive mechanism 33 includes a limit switch attached to the lower end of the fixing member 34. This open position sensor 46
When the cover plate 31 is located at the open position, is pressed by the support link 36 to be turned on and outputs an open position detection signal.

The work controller 47 operates the swivel base 11, the boom 12, etc. in response to an operation signal input from the operating device 15 mounted on the workbench 13 only when the open position detection signal is input. (That is, switching control of a hydraulic valve unit (not shown) is performed).

Next, the operation of the covering device 30 thus constructed will be described. When work such as traveling is not performed, as shown in FIG. 3A, the cover plate 31 is placed in the closed position and the sub-cover portion 31
a is pulled out from the main cover portion 31a. The cover plate 31 located at the closed position approaches the side surface of the working device 10 for high places stored in the vehicle body 2 and covers the side surface of the working device 10 for high places. Thereby, the working device 10 for high places cannot be seen at least from the side of the vehicle body 2. Therefore, the work vehicle 1 can be made to look smart, and by painting the surface of the cover plate 31 with a bright color paint or by drawing a cute illustration, the work vehicle 1 at a high place has a clean and friendly image. Can be shown to.

When performing work at height, first, the vehicle body 2 is supported by the outrigger jack 20. As a result, the jack support sensor 43 outputs a support detection signal.
Next, the sub cover portion 31a is stored in the main cover portion 31a. As a result, the storage sensor 42 outputs a storage detection signal, and the opening / closing controller 45 can control the opening operation of the cover plate 31. After that, the open button of the open / close switch 41 is pressed to move the cover plate 31 downward toward the open position as shown in FIG. 3 (B). The main cover portion 31a and the sub portion 31b housed in the main cover portion 31a are provided in the space between the front and rear outrigger jacks 20, 20, that is, as shown by the chain line in FIGS. Outside the space (extendable range) R2 that juts out to the side, descend to the open position.

Here, if the cover plate 31 is moved downward without housing the sub-cover portion 31b in the main cover portion 31a, the sub-cover portion 31b will pass through the outriggerable range R2 of the outrigger jack 20. Therefore, the sub-cover portion 31b may interfere with the outrigger jack 20. However, by storing the sub cover portion 31b in the main cover portion 31a as described above, such interference can be reliably prevented. Actually, since the opening / closing controller 45 restricts the opening operation when the sub-cover 31b is pulled out, even if the opening button of the opening / closing switch 41 is erroneously pressed, the cover plate 31 does not move downward from the closed position. .

When the cover plate 31 is in the open position, the open position sensor 46 outputs an open position detection signal. This enables the work controller 47 to control the operation of the work device 10 for high places. Here, the lower end of the cover plate 31 located in the open position does not interfere with the ground because the vehicle body 2 is lifted to the ground by the predetermined amount H by the outrigger jack 20. Further, the cover plate 31 located in the closed position is located below (outside) the space (operable range) R1 in which the working apparatus 10 for high places shown in FIG. 1B operates. Therefore, it is possible to prevent the working device 10 for high places from operating from interfering with the cover plate 31.

In the above embodiment, the case where the cover ring device is attached to the work vehicle at high places has been described, but the cover ring device according to the present invention can be attached to work vehicles other than work vehicles at high places. .

[0031]

As described above, in the covering device of the present invention, the cover member is driven to open and close by the driving means, so that the labor burden on the operator can be reduced. Then, by moving the cover member to the closed position, the working device can be hidden at least from the side of the vehicle body, while by moving the cover member to the open position, the working device can be freely moved without interfering with the cover member. Can be activated. By restricting the operation of the work device when the cover member is not in the open position by the restricting means, it is possible to reliably prevent interference between the work device and the cover member due to an erroneous operation or the like.

When the cover member is moved from the closed position to the open position, the sub-part of the cover member is stored in the main part. For example, the outrigger jack is attached to the side surface of the vehicle body. Even when the cover member is present, the cover member can be moved to the open position without interfering with the jack. On the other hand, in the cover member located at the closed position, by pulling out the sub portion with respect to the main portion, the entire side surface of the working device can be easily covered.

[Brief description of drawings]

FIG. 1 is a side view of an aerial work vehicle equipped with a covering device according to the present invention.

FIG. 2 is a perspective view of a cover member in the covering device.

FIG. 3 is an operation explanatory view of the covering device.

FIG. 4 is a block diagram of a control unit in the covering device.

FIG. 5 is an operation explanatory view of the covering device.

[Explanation of symbols]

 1 aerial work vehicle 10 aerial work device 20 outrigger jack 30 cover ring device 31 cover plate 33 drive mechanism 40 control unit R1 operable range R2 overhangable range

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hiroyuki Kido 10 1072 1152 Yamashita, Ryoke, Ageo City, Saitama Prefecture Aichi Corporation Ageo Factory

Claims (3)

[Claims] 1. A cover ring device for a work vehicle mounted on a work vehicle having a work device on an upper surface of a vehicle body, the cover member being arranged along a side surface of the vehicle body, Drive means for opening and closing between a closed position that is close to the side surface of the device and covers the side surface and an open position that is away from the side surface of the working device and is outside the operable range of the working device. And a working vehicle covering device. 2. A regulating means for regulating an operation of interfering between the working device and the cover member unless the cover member is located at the open position.
The covering device for a working vehicle according to 1. 3. The cover member comprises a main portion and a sub portion, and the sub portion can be pulled out and stored in the main portion. Covering device for the work vehicle described.