JPS6225840B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a construction vehicle, and particularly to a construction vehicle that is particularly effective for tunnel construction, for example.

Generally, when carrying out tunnel construction, after the excavation work, a structure is constructed to support a wall created by the excavation work. This is what is called shoring. In this way, at least two types of work are performed in tunnel construction: excavation and erection of shoring. Conventionally, each of these operations required a dedicated vehicle, ie, an excavation work vehicle such as a bulldozer, and a shoring work vehicle. However, the need for a dedicated vehicle for each task also makes it difficult to transport the work vehicle to the site.
It must also be said that it is inconvenient to keep them at the scene.

The present invention has been developed in view of the above. That is, an object of the present invention is to provide a construction vehicle that can perform functions corresponding to the required work.

An embodiment of the present invention will be described below with reference to the drawings.

In the drawing, 1 is a dozer shovel main body, and a pair of parallel arms 3, 3 connected to a lift cylinder 2 are arranged in parallel toward the front on the upper part of the dozer shovel main body. Further, the lift cylinder 2
is incorporated into a hydraulic circuit (not shown), and its expansion and contraction operations can lift both parallel arms 3, 3 synchronously. Various working devices are removably attached to the front ends of both parallel arms 3, 3 depending on the required work. In this example,
When discharging earth excavated by excavation work, an ordinary shovel bucket (not shown) is attached, and when erecting shoring, an attachment A as shown is attached. This attachment A will be explained below.

Reference numeral W denotes a support frame formed in a lattice shape, and a pair of mounting brackets 4, 4 fixed to the rear side edge are horizontally connected to the parallel arms 3, 3 through insert pins 5, 5. and is removably attached. Further, a main deck 6 for work is mounted on this support frame W, and the main deck 6 is moved forward and backward by a center cylinder 7 that is supported horizontally at the center of the support frame W on the lower surface side of the main deck 6. It is possible to slide in the direction. Next, a mechanism for supporting the sliding movement of the main deck 6 will be explained.

Outer rails 8, 8 extending a predetermined length toward the rear of the main deck 6 are attached to both left and right end edges of the lower surface of the main deck 6. A pair of side rollers 9 are provided at the rear of each outer rail 8, 8.
9 are arranged at predetermined intervals in the front-rear direction. Each of the side rollers 9, 9 is rotatably fitted to both channel-shaped slide rails 10, 10 arranged on both left and right sides of the support frame W, respectively. On the other hand, four front rollers 12 to 12 shown are rotatably attached to the front edge of the support frame W, and are arranged at approximately equal intervals.
It can support the sliding movement of the main deck 6 in cooperation with the side rollers 12 to 12 mentioned above.

The center cylinder 7 is connected to the aforementioned hydraulic circuit, and can be expanded and contracted at a slow speed by an operating device (not shown) that performs overall control of the hydraulic circuit. Further, 14 is a safety net stretched over the support frame W.

Reference numerals 15 and 15 denote a pair of sub decks that are foldably supported on both side edges of the main deck 6 via hinges 16, and both sub decks 15 and 15 have brackets 17,
Folding cylinder 1 attached via 17
It is connected to each rod end of 8 and 18. Both folding cylinders 18, 18 are connected to the above-mentioned hydraulic circuit, and are in an extended state to hold the sub decks 15, 15 in an upright state when traveling, and are contracted during work, and can be retracted in synchronization with each other or individually to a horizontal position. I can lean towards it.

Next, the erector 24 for supporting the shoring 25 during erection work will be explained.

Reference numerals 19 and 19 designate guide cylinders of the boom 20, and each is supported horizontally at the rear end of the upper surface of the support frame W via appropriate brackets.

The boom 20 penetrates into both guide tubes 19, 19 so as to be able to slide in the front and back directions, and is supported in a horizontal state by a pair of rollers 21, 21 built in at the front and rear of the guide tube 19, respectively. Smoothness of sliding motion is maintained. Further, a feeding device 22 for the boom 20 is attached to the lower surface side of both guide tubes 19,19. Although not shown in detail, the feeding device 22 is composed of a combination of a rack, a pinion, etc. whose driving source is a hydraulic motor or the like connected to the aforementioned hydraulic circuit.

Further, an erector 24 is attached to the front ends of both booms 20, 20 via an erector hanger 23 made of a parallelogram link, and the erector 24 is connected to the above-mentioned hydraulic circuit by a tail cylinder 26. Able to perform tilt movements. moreover,
Each erector 24, 24 is formed so as to be able to securely hold the support 25, and in particular, as shown in the figure, the upper end of the part where it is inserted for the arched support 25 is chamfered with a downward slope from the inside to the outside. 27, 27 are applied (see Figure 3).

Note that 28 is a balance weight detachably attached to the rear of the dozer shovel body 1, and 29 is a rigger for preventing the body 1 from tipping forward.

Subsequently, the operation and effect of this example according to the above configuration will be specifically explained.

When the shoring 25 is to be erected after the tunnel excavation work, the bucket of the dozer shovel is first removed, and the attachment A of this example is attached.
This installation work can be easily done by inserting and removing the insert pin 5, and at this time, the work of connecting the hydraulic system paths of each cylinder etc. on the side of the attachment A and the hydraulic circuit on the side of the dozer shovel body 1 is also performed. be exposed.

When the replacement work of the attachment A is thus completed, the dozer shovel main body 1 is carried into the tunnel. However, during this transport, both sub-decks 15, 15 are held folded in an upright state.

Preliminary work is then performed on the dozer shovel at the work site, such as by setting riggers 29, 29, etc. to prevent it from tipping forward. Thereafter, one end side of the arch-shaped support 25 is spanned between both erectors 24, 24, and is held between the erectors 24, 24. Then, as the worker climbed onto main deck 6,
Extend the lift cylinder 2 to lift the entire attachment. At this time, the main deck 6 is always held in a horizontal state by the parallel arm 3 and is translated upward. Along with this lifting operation of attachment A, the shoring 25 is lifted up by the erector 2.
4, it is lifted to an appropriate height centering on the grounded end. Under this, the work of tightening the shoring 25 is performed. That is, by extending the center cylinder 7,
The main deck 6 is slowly advanced along the support frame W to guide the worker to a desired work position. Then, the tightening work is performed while the tail cylinder 26 is expanded and contracted as necessary to adjust the lifting height of the shoring 25 to a predetermined height. Furthermore, in this example, by contracting the folding cylinder 18, the sub-deck 15 can be turned to a horizontal position, thereby making it possible to secure a wider platform for work. Furthermore, in this example, since the erector 24 can be displaced in the front-back direction, when the shoring 25 is erected sequentially in the tunnel excavation direction, the dozer shovel body 1 can be moved without moving the dozer shovel body 1 within the extension range of the boom 20. be able to perform the following tasks.

As described above, according to this embodiment, the bucket can be attached to the dozer shovel interchangeably. As a result, the dozer shovel can perform both the excavation function and the shoring erecting function, and these functions can be selected as appropriate depending on the work. Therefore, unlike the conventional
This has the excellent effect of not requiring a dedicated vehicle for each task.

Although this example is an attachment for erecting shoring, for example, a rock drilling rig may be attached instead of the erector 24 in this example, which means that the type of work required for tunnel construction can be changed. Depending on the situation, various attachments are considered.

As is clear from the above description, the present invention is a construction vehicle in which an attachment is removably attached to the tip of a parallel link mechanism via a mounting bracket, and the attachment is attached so as to be capable of reaching in the horizontal direction. At least one side of the main deck includes a main deck that has a foldable sub-deck, and a supporting erector for the shoring, which is supported so that it can reach in the horizontal direction and is mounted so that it can move in parallel in the vertical direction via a parallel link mechanism. It is distinctive in that it is constructed with the following.

Therefore, according to the above configuration, firstly, the sub-deck is provided so as to be foldable, and furthermore, by being capable of reach operation together with the main deck,
Although it is usually folded and kept in a compact state, it can be unfolded during work, and even extended and contracted back and forth to provide a wider foothold for workers. Therefore, the work area can be expanded without moving the vehicle. Furthermore, since the erector for supporting the shoring is also capable of reach operation, etc., the work range for erecting the shoring in a stationary state can be expanded.

[Brief explanation of the drawing]

The drawings show one embodiment of the invention,
Figure 1 is a side view of this example vehicle, Figure 2 is a plan view of the same,
FIG. 3 is a front view of the same, and FIG. 4 is an enlarged sectional view of the vicinity of the side rollers. 1... Dozer shovel body, 6... Main deck, 15... Sub deck, 24... Erecta, 2
5... Shoring, A... Attachment.

Claims (1)

[Claims] 1. A construction vehicle in which an attachment is removably attached to the tip of a parallel link mechanism via a mounting bracket, wherein the attachment is attached so as to be capable of reaching in the horizontal direction, and has a sub-deck on at least one side thereof. It is characterized by being comprised of a main deck that is foldable, and a support erector for the shoring that is supported so as to be reachable in the horizontal direction and is mounted so as to be movable in parallel in the vertical direction via a parallel link mechanism. and construction vehicles.