JPH0455075Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a high-pressure jet water injection device for green removal work vehicles used at dams and other large-scale concrete placement sites.

(Prior Art) In recent large-scale concrete pouring work, the so-called RCD method, in which concrete is poured in layers, has been adopted, instead of using the conventional framework method.

Therefore, in the RCD method, in order to prevent the joint strength between concrete layers from decreasing, it is necessary to perform work (green cutting work) to completely remove the scum (green) etc. that seeps into the existing surface. .

Conventional work equipment uses a simple device with a brush that rotates in the direction of travel of the equipment, which is then flushed with a high-pressure water jet, and does not have the ability to remove to the depth (10 mm) that is normally required. Due to surface irregularities or height differences, the brush floats up or does not follow the surface condition, resulting in greens being left behind and requiring repeated work, resulting in inefficiency.

(Purpose) This device is a device that is attached to a green removal device attached to the arm of a work vehicle, and is used to remove green scraped by a brush and the remaining portions of small recesses according to the situation. The present invention provides an injection device capable of ejecting a jet water stream by varying the angle.

(Structure) The present invention provides a green removal work vehicle in which a brush support frame including a horizontally rotating group of brushes is pivotally attached to the tip of an arm of the work vehicle so that the frame end can swing vertically. A support rod with both wings that is parallel to the frame and whose both ends rotate horizontally is attached to the arm so that its height can be adjusted on the back side. The nozzle mounting plate includes a plurality of nozzle mounting plates each having an arcuate surface and a groove for varying the nozzle mounting position on the arcuate surface, and a drive device for rotating the nozzle mounting plate.

(Example) 1 is a working vehicle, 2 is a boom supported on the swivel base of the working vehicle, and 3 is an arm.

Reference numeral 4 designates a mounting plate which is pivotally attached 6 to the tip 5 of the arm and which itself constitutes a part of the link mechanism; 7 is a hydraulic cylinder; and 8 is a rod.

Reference numeral 9 denotes a brush group support frame, the central portion of which is pivotally connected to the mounting plate 4 via brackets 9a, 4a by a pin 10 extending in the vehicle traveling direction.

Reference numeral 11 denotes flexible casters fixed to both ends of the frame, which hold the frame at a predetermined height and facilitate the swinging operation of the arm, thereby enlarging the area to be worked on.

12 is a horizontal rotating brush group, each brush 13
is fixed to a mounting member 15 connected to a parallel link mechanism 14 pivotally mounted on the front surface of the back plate 9a of the frame.

Reference numeral 16 denotes a coil spring, one end of which is fixed to the fixed pivot portion 14a of the link mechanism, and the other end of which is fastened to the slide groove 18 of the lower link 17 so that its position can be adjusted to adjust the grounding pressure of the brush 13. .

The rotating shaft 19 of the brush is directly connected to a hydraulic motor 20, and the rotational speed of each brush is controlled separately.

Reference numeral 21 denotes a high-pressure water injection device, which is attached to the back surface 3a of the arm 3.

Reference numeral 22 denotes a support rod, and rotary support rods 22a and 22b are connected to both left and right ends of the support rod through connection pins 23.

24 is a rotation cylinder.

The support rod 22 is connected to the arm 3 via a connecting bar 25.
It is pivotally mounted 26 on the back of the body and is attached by a rod or cylinder 27 so that the angle or vertical position can be adjusted.

A plurality of nozzle mounting plates 28 are attached to the support rod 22 and the movable support rods 22a and 22b, respectively, so as to be adjustable in rotation.

That is, 29 is the base end of the mounting plate and the support rod 2
2, and is provided with a mounting arcuate surface 30 curved with respect to the injection point on the distal end side, and a position adjustment groove 31 provided along the arcuate surface.

Each nozzle 32 is connected to a pipe 33, and the pipe 33 is fixed to the arc surface 30 by a U bolt 34 passing through the groove 31.

Reference numeral 35 denotes a drive device for changing the angle of the mounting plate, that is, the spray angle of the nozzle, and is, for example, a mechanism including an eccentric disk 36 and a link 37, or a small cylinder.

38 is a nozzle opening adjustment valve, 40 is a joint, and 41 is a flexible hose.

(Operations and Effects) Next, a case where a work vehicle equipped with the above-mentioned device performs construction on a concrete pouring surface and the operations and effects of the present device will be explained.

The contact angle of the brush is controlled by the cylinder 7, the support frame 9 is supported by the caster 11, and the contact force of the brush is controlled by the spring 16.
This is done by the position adjustment screw 16a.

When the work vehicle advances in this state, the support frame 9
The brushes swing around the pin 10 according to the slope or unevenness of the work surface, but each brush is vertically installed independently and is constantly applied downward pressure, so scraping can be performed without the brushes lifting up. Able to complete work.

The high-pressure jet water sprayed against the scraping surface is
The injection angle and injection point can be changed freely.

That is, before the work, the position is adjusted with respect to the mounting circular arc surface 30, and during the work, the mounting plate 28 is rotated or swung by the driving device 35.

This allows the spray removal work to be carried out in accordance with the condition of the green to be removed, thereby minimizing the spray pressure and amount of water and saving the spray energy, making it possible to carry out economical and efficient work.

Note that if the support means for the support rod 22 is a hydraulic cylinder instead of a rod, efficient work can be achieved by combined operation with the mounting plate drive device 35.

[Brief explanation of the drawing]

FIG. 1 is a side view of a working vehicle equipped with the device of the present invention, FIG. 2 is a plan view of the device in the installed state, FIG. 3 is a front view thereof, and FIG. 4 is a side view. 22...Support rod frame, 28...Nozzle mounting plate, 31...Mounting position adjustment groove, 35...Mounting plate drive device, 32...Jet nozzle.

Claims (1)

[Scope of utility model registration request] In a green removal work vehicle, a brush support frame including a group of horizontally rotating brushes is pivotally attached to the tip of an arm of the work vehicle so that the frame end can swing vertically; A support rod with both wings, whose both ends rotate horizontally, is attached to the arm so that its height can be adjusted, and the proximal end is pivotally connected to the support rod, and an arcuate surface is formed on the tip side. A high-pressure water injection device for a green removal work vehicle, comprising a plurality of nozzle mounting plates each having a groove for varying the nozzle mounting position, and a drive device for rotating the nozzle mounting plates.