JP2525280Y2 - Guide device for hydro phrase excavator - Google Patents

Description

[Detailed description of the invention] << Industrial application field >> This invention relates to a guide device for accurately introducing a hydrophrase excavator into an excavation groove at the start of excavation.

《Background of the invention》 A hydrophrase excavator is a machine that hangs on a wire and excavates one panel of a continuous underground wall.

This excavator is equipped with a plurality of hydrophrase cutters at the end of a rectangular vertical frame, cutting both side walls inside the underground according to the cutter width while hanging with wires, and the frame is fully sunk In Japanese Patent Application Laid-Open No. H11-157, the pad for adjusting the excavation position is pressed to the left, right, front and rear of the inner wall portion of the already excavated ditch to control the posture.

Therefore, with this hydrophrase excavator, accurate excavation can be performed when the frame is completely sunk.

By the way, in the initial stage of excavation in this type of excavator, the lower part of the guide wall for positioning the top provided on the ground surface is excavated shallow in advance, and the hydrophrase excavator is suspended just above the guide wall. Excavation is started after the tip has landed in the shallow groove.

Therefore, the entire hydrophrase excavator is suspended by a wire and descends in a relatively unstable posture until it reaches the bottom of the shallow groove. However, the guide wall came into contact with the guide wall and damaged it, and it took time to position the guide wall.

Conventionally, a guide frame for positioning is formed by combining H-shaped steel in a cross-girder shape or welding a steel material in accordance with the cross-sectional shape of a hydrophrase excavator to form a rectangular shape on the upper portion of the guide wall. The tip of the hydrophrase excavator was being introduced inside and was lowered inside the guide wall.

《Problems to be solved by the invention》 However, with the guide frame having the above structure, it is troublesome to adjust the displacement of the hydrophrase excavator with respect to the inside of the guide wall, or to accurately introduce the excavator inside the guide wall. Was.

In other words, the inner dimensions of the guide frame are formed larger than the outer shape of the hydrophrase excavator in order to avoid contact at the time of introduction. , The positioning accuracy is reduced.

Therefore, in order to fill the gap between the two at the introduction stage, workers inserted square wood and the like to achieve stabilization, but this insertion work is dangerous and troublesome for workers,
Further, there has been a disadvantage that the accuracy control is affected by wear of the square bars or uneven dimensions.

The present invention solves the above-mentioned problems, and a hydrophrase excavator that can sufficiently improve the work efficiency and safety at the time of introducing the excavation start position of the hydrophrase excavator, and can further improve the positioning accuracy. The purpose of the present invention is to provide a guide device.

<< Means for Solving the Problems >> In order to achieve the above object, the present invention relates to a hydrophrase excavator having a rectangular guide frame installed above a guide wall provided at the top end of an excavation groove. A guide device, wherein the guide frame has a plurality of frame fixing means movable inward and outward to support the guide frame with respect to the guide wall, and presses and supports an outer portion of the excavator. Therefore, a plurality of guide rollers movable inward and outward are provided.

<< Operation >> A guide frame is installed on the upper part of the guide wall, and the frame fixing means is moved to support the guide frame against the guide wall. The excavator is positioned inside the guide frame by further lowering the excavator.

By moving each guide roller inside the guide frame in this state, the outer portion of the hydrophrase excavator is brought into contact with each guide roller, and is positioned with a certain gap inside the guide frame.

Thereafter, when the hydrophrase excavator is further lowered, each guide roller rolls and introduces the hydrophrase excavator accurately into the bottom of the hole of the excavation groove.

<< Embodiment >> Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

 1 to 4 show a first embodiment of the present invention.

In the drawing, reference numeral 1 denotes an excavation groove which has been excavated shallow in advance, and 2 denotes a guide wall which is buried on both sides of the top end of the excavation groove 1 and partitions both sides of the excavation groove 1.

The inside of the excavation groove 1 is filled with muddy water, and prior to the excavation work, a guide device 3 is provided on the top end of the guide wall 2.
Is installed in a positioning state, and introduces a hydrophrase excavator 4 (hereinafter simply referred to as an excavator) suspended by a wire (not shown) into the guide wall 2.

As shown in FIG. 1, the guide device 3 combines steel materials by welding or the like, and
And a plurality of guide rollers 6 arranged around the guide frame 5 on the four sides of the guide frame 5.

The outer periphery of each guide roller 6 is coated with an elastic resin 7 such as urethane resin, and both ends thereof are rotatably supported by bearing brackets 8.

The bearing bracket 8 is, as shown in FIG.
A flat plate portion 8a; and a pair of bearing plates 8b provided on both sides of the flat plate portion 8a and standing in an overhanging shape toward the inside of the guide frame 5, and the guide roller is provided on the tip end side of each bearing plate 8b. The sixth shaft 6a is rotatably supported.

Further, a pair of elongated hole-shaped guide holes 8c are opened in the flat plate portion 8a at right angles to the longitudinal direction of the guide frame 5, and each of the guide holes 8c has a guide protrudingly provided on the guide frame 5. The bolt 9 is engaged, and a nut 10 is screwed to the protruding end of the bolt 9, thereby fixing the bearing bracket 8 movably along the inside and outside directions of the guide frame 5.

Next, an introduction guide operation of the excavator 4 using the guide device 3 having the above configuration will be described.

First, as described above, the guide frame 5 is positioned and installed on the upper portion of the guide wall 2, and then the wire is fed out to lower the hydrophrase excavator 4, and is positioned inside the guide frame 5, and further lowered, thereby excavating the excavator. 4 is positioned inside the guide frame 5.

In this state, if each bearing bracket 8 is moved inward of the guide frame 5 and re-fixed while the outer periphery of the guide roller 6 is in contact with the outer portion of the excavator 4, the excavator 4 will
As shown in FIG. 3 and FIG. 3, the guide rollers 6 are pinched and positioned between the guide rollers 6 while keeping a fixed gap inside the guide frame 5.

In this case, the position of the excavator 4 can be adjusted to an accurate position by adjusting the amount of movement of the bearing bracket 8 at each position.

Thereafter, when the wire is drawn out again and the excavator 4 is further lowered, each guide roller 6 guides the excavator 4 accurately and smoothly into the guide wall 1 while rolling.

Therefore, the excavator 3 is introduced to the bottom of the hole of the excavation groove 1 without contacting other parts, and directly contacts the resin 7 of the guide roller 6 to prevent the excavator 3 from being damaged.

FIGS. 5 to 7 show a second embodiment of the guide device according to the present invention.

The guide device 20 in the figure has a configuration in which the guide frame 22 is configured to be able to move a pair of vertical frames 22b parallel to the guide wall 2 with respect to a pair of horizontal frames 22a fixedly arranged perpendicular to the guide wall 2. Things.

As shown in the enlarged view of FIG. 7, both ends of the vertical frame 22b are slidably engaged with a slide guide 24 provided inside the horizontal frame 22a, and a plunger 26 of the hydraulic cylinder 26 is provided.
Connected to a. Each hydraulic cylinder 26 is connected to a hydraulic drive circuit that is distributed via a distributor 28 disposed at the center of the vertical frame 22b. Both sides of the vertical frame 22b are moved along the longitudinal direction of the horizontal frame 22a by an equal hydraulic drive force. The movement can be adjusted.

The bearing brackets 8 are fixedly arranged on each of the vertical frames 22b, and the guide rollers 6 are positioned inside the vertical frames 22b.

On the other hand, the bearing bracket 8 on the horizontal frame 22a is configured to be movable inward and outward as in the first embodiment.

A pair of hydraulic cylinders 32 for fixing the device are arranged below the horizontal frames 22a, and a distributor 36 for distributing and driving is arranged at the center (shown in FIG. 5).
Is mounted on the guide wall 2, the fixing hydraulic cylinder 32 is driven, and a pad 34 (frame fixing means) provided at the tip of the plunger 32a is brought into contact with the inside of the guide wall 2 so that the guide device 20 is moved. It is positioned and fixed on the guide wall 2.

In this embodiment, with the excavator 4 having its tip lowered inside the guide frame 20, each of the vertical frames 22b
Of the excavator 4 is pinched by the respective guide rollers 6 at the same time, and is positioned at an accurate position.

The guide roller 6 comes into contact with both sides of the excavator 4 by adjusting the bearing bracket 8 in the same manner as in the first embodiment, and thereafter, as in the first embodiment, the excavator 4 The roller 6 is guided by the hole bottom of the excavation groove 1 while rolling.

<< Effects of the Invention >> As described in detail in the above embodiments, in the guide device of the hydrophrase excavator according to the invention, the conventional steel materials are simply combined in a cross-girder shape and welded in a rectangular shape. Unlike the work using the guide frame made, the tip of the excavator can be accurately and quickly guided into the excavation groove, and the excavation accuracy and work efficiency in the initial stage of excavation can be improved. .

In addition, since the operation of adjusting the position of the excavator is merely an operation of moving the guide roller, sufficient safety can be ensured as compared with the conventional case of adjusting the excavator by sandwiching a square bar therebetween.

[Brief description of the drawings]

1 to 4 show a first embodiment of the present invention. FIG. 1 is a plan view, FIG. 2 is a longitudinal sectional view, FIG.
FIG. 4 is an enlarged perspective view of a portion A of FIG. 1, FIGS. 5 to 7 show a second embodiment of the present invention, FIG. 5 is a plan view, and FIG. 6 is an enlarged view of a portion B of FIG. Perspective view, seventh
The figure is a cross-sectional view. 1 ... excavation groove 2 ... guide wall 3,20 ... guide device 4 ... hydrophrase excavator 5,22 ... guide frame 6 ... guide roller 8 ... bearing bracket 34 ... pad (frame fixing means)

Claims (1)

(57) [Scope of request for utility model registration] 1. A guide device for a hydrophrase excavator having a rectangular guide frame installed on an upper part of a guide wall provided at a top end of an excavation groove, wherein the guide frame is provided with the guide frame. A plurality of frame fixing means movable inward and outward to support the guide wall in a stretched manner; and a plurality of guide rollers movable inward and outward to press and support an outer portion of the excavator. A guide device for a hydrophrase excavator, characterized in that: