JP2555887Y2 - Drilling angle setting device for drill pipe - Google Patents

Description

[Detailed description of the invention]

[0001]

[Industrial application] The present invention is to precisely set the drilling angle of the drill pipe with respect to the earth retaining wall when excavating the earth retaining wall and the ground on the back side of the earth retaining wall with a drill pipe in the earth anchoring method by earth anchoring method. To a device for doing so.

[0002]

2. Description of the Related Art Earth anchors are installed at predetermined intervals from a retaining wall to a support layer, and holes for each earth anchor are formed by drilling with a drill pipe. At this time, the vertical and horizontal digging angles of the drill pipe with respect to the retaining wall are designed in advance, and digging is performed according to the design values. Conventionally, the vertical drilling angle is set by hanging the gauge and tilting the drill pipe until the drilling angle reaches a predetermined angle. However, the horizontal direction relies on visual observation.

[0003]

[Problems to be solved by the invention] However, recently, since the excavation work is performed considerably deeply, the length of the ground anchor is long, and the space between the ground anchors is 4 to 5 m.
Since it is as narrow as ~ 2 m, even if the horizontal excavation angle is shifted by 1 ° from the design value, there is a problem that adjacent ground anchor holes intersect.

The present invention has been made to solve such a problem, and has as its object to precisely set a horizontal drilling angle of a drill pipe with respect to a retaining wall.

[0005]

In order to achieve the above object, according to the present invention, a base detachably attached to a drill pipe is provided with a base of a long arm extending toward a drilling surface so as to be able to ascend and descend. At the tip of the long arm, a cross bar facing the horizontal index provided on the excavation surface is provided so as to be pivotable, and between the long arm and the cross bar, an angle display tool that displays an angle between the two and an angle indicator between the two. A drill angle setting device for a drill pipe, characterized in that a stopper for fixing an angle is provided.

The present invention also provides a depression angle measuring device for measuring a depression angle of a drill pipe on a table detachably attached to the drill pipe, and furthermore, a base of a long arm extending toward a drilling surface is provided so as to be able to descend. At the tip of this long arm, a cross bar facing the horizontal index provided on the excavation surface is provided so as to be pivotable, and between the long arm and the cross bar, an angle indicator for displaying the angle between the two, And a stopper for fixing the angle of the drill pipe is provided.

[0007]

[Function] Turn the crossbar until the angle between the long arm and the crossbar becomes the horizontal drilling angle (design value) of the drill pipe,
With the angle fixed by the stopper, the base is attached to the drill pipe. The angle may be fixed after attaching the base. Then, the long arm is lowered until the cross bar reaches the level of the horizontal index provided on the excavation surface. here,
Rotate the drill pipe together with the base until the rungs are parallel to the index. At this time, the tip of the drill pipe is directed toward a target marked on the drilling surface, and the turning of the drill pipe is performed around this target. Thereby, the horizontal drilling angle of the drill pipe is set.

According to the second aspect of the present invention, after the base is attached to the drill pipe as described above, the tip of the drill pipe is directed to a target marked on the drilling surface, and is integrated with the base until the depression angle reaches a design value. Raise the drill pipe. Before or after this, the lowering of the long arm and the turning of the drill pipe are performed in the same manner as described above. Thereby, the drilling angle of the drill pipe is set in both the horizontal and vertical directions.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG.
FIG. 3 is a side view showing a use state of the present embodiment, FIG. 3 is a plan view partially showing the present embodiment in a use state, and FIG. 4 is a plan view showing a use method of the present embodiment.

As shown in FIG. 1, in this embodiment,
The table 2 is composed of a rectangular top plate 22 and two leg members 21 fixed to both ends in the longitudinal direction. This leg member 2
Reference numeral 1 denotes two plates having two legs 23 opened at an angle corresponding to the diameter of the drill pipe 1, and a magnet 24 is fixed between both plates in a portion corresponding to the legs 23. Thereby, the base 2 is detachably attached to the iron drill pipe 1.

On the top plate 22, a level 25 is fixed, and a depression angle measuring device 26 for measuring the depression angle of the drill pipe 1 is attached. In the depression angle measuring device 26, the needle 27 moves according to its own inclination, and the scale indicated by the needle 27 indicates the inclination angle. A magnet is built in the lower end surface of the depression angle measuring device 26 and is detachably attached to the iron top plate 22 by magnetic force.

A base of a long arm 3 is pivotally fixed to one end in the longitudinal direction of the base 2 via a bracket 4 so that the base can be raised and lowered. The long arm 3 includes a long plate 31 having a groove 31a extending in a longitudinal direction at a tip thereof, and a rod-shaped slide member 32 slidably inserted into the groove 31a. Therefore, the long arm 3 can be adjusted to a predetermined length by sliding the slide member 32 along the groove 31 a of the long plate 31 and fixing it with the set screw 33.

The bracket 4 is fixed to the end of the base 2, and the base of a long plate 31 forming the long arm 3 is supported by the bracket 4. The bracket 4 has a guide member 5 for fixing the angle of elevation of the long arm 3. The guide member 5 has an arc-shaped opening 5a having a fixed width, and a set screw 5b with a washer having a diameter larger than the width of the opening 5a is provided in the opening 5a. The long arm 3 is inserted from the outside of the member 5 toward the long plate 31. The set screw 5b is screwed into a side plate fixed to the side near the base of the long plate 31.

On the other hand, at the tip of the slide member 32 corresponding to the tip of the long arm 3, a crosspiece 6 made of a long plate narrower than the long arm 3 is provided so as to be rotatable in a horizontal plane. here,
An angle indicator 7 made of a protractor-shaped semi-disc is fixed to the center of the upper surface of the crosspiece 6, and the angle indicator 7 is extended by a shaft 8 penetrated from the angle indicator 7 through the slide member 32 through the crosspiece 6. The cross bar 6 is supported on the arm 3 integrally with the angle indicator 7.

A scale 7b similar to a protractor is engraved around the angle display 7, and a semi-arc slit 7a is opened inside the scale 7b. Then, a set screw 9 having a flange 9a having an outer diameter larger than the width of the slit 7a is screwed into the slide member 32 forming the tip of the long arm 3 from the angle indicator 7 side. The shaft portion of the set screw 9 beyond the flange 9a is loosened by loosening the set screw 9
Is turned so that the slit 7a can be easily moved.

A mark 10 is engraved on the slide member 32 of the long arm 3 near the boundary with the angle indicator 7, and a portion of the scale 7b corresponding to the mark 10 is formed by the long arm 3 and the crosspiece 6. Will be displayed. This angle is fixed by tightening the set screw 9, and the set screw 9 corresponds to the stopper in the present invention. Hereinafter, a procedure for using the present embodiment will be described.

As shown in FIG. 2, this device is a drilling machine 1
The base 2 is attached to one drill pipe 1 for use. The drill pipe 1 is moved from a retaining wall 12 made of a steel pipe pile or the like toward a support layer to a ground pile 13.
This is for excavating holes for earth anchors.
The tip of the drill pipe 1 is inserted toward a target 14 marked on the retaining wall 12.

First, the set screw 33 is loosened, the slide member 32 is slid with respect to the groove 31a of the long plate 31, the length of the long arm 3 is determined, and the set screw 33 is tightened. Then, the angle between the long arm 3 and the cross bar 6 is adjusted to the horizontal digging angles (θ ₁ , θ ₂ , θ ₃ ) designed according to the digging position, as shown in FIG. That is, the set screw 9 is loosened and the cross bar 6 is turned. When the mark 10 points to a predetermined value of the scale 7b, the turning is stopped and the set screw 9 is tightened.

In this state, the base 2 is attached to the drill pipe 1 at an appropriate position so that the long arm 3 faces the earth retaining wall 12. At this time, the table 2 is placed on the drill 2 with the drill pipe 1 kept horizontal, and the level 2 is set so that the level 25 indicates horizontal.
Adjust the position of 3. Then, the tip of the drill pipe 1 is turned to the target 14 and the drill pipe 1 is lowered integrally with the table 2 until the depression angle measuring device 27 indicates the design value. Thereby, the depression angle of the drill pipe 1 is set.
After this, the angle between the long arm 3 and the crosspiece 6 may be fixed as described above.

Next, the set screw 5b is loosened, and the set screw 5b is moved along the opening 5a of the guide member 5 so that the horizontal bar 6 is provided with a horizontal indicator (such as a piano wire) 15 provided on the earth retaining wall 12. After lowering the long arm 3 to the height, the set screw 5b is tightened. One example of this state is shown by imaginary lines in FIG. The index 15 may be displayed directly on the retaining wall 12 which is an excavation surface, or may be provided at a position slightly away from the retaining wall 12.

Here, the drill pipe 1 is turned integrally with the table 2 to reach a position where the crosspiece 6 is parallel to the index 15. This turning is performed about the target 14 as an axis. That is, as shown in FIG. 4, the center line of the drill pipe located below along the length direction of the long arm 3 is changed from 1a to 1b.
Move to become. Thereby, the horizontal drilling angle of the drill pipe 1 is set.

After setting the drilling angle of the drill pipe 1 in both the horizontal and vertical directions in this way, the apparatus is removed from the drill pipe 1 and the drilling machine 11 is operated to connect the drill pipe 1 to the earth retaining wall 12. It is inserted from the target 14 and excavated. Therefore, if this apparatus is used, the drilling angle of the drill pipe 1 can be set by a simple operation, and in particular, the angle in the horizontal direction, which has conventionally depended on visual observation, can be set precisely.

As means for attaching and detaching the table 2 to and from the drill pipe 1, in addition to the magnet 24, a suction cup and other structures can be employed.

[0024]

As described above, according to the present invention, the drilling angle of the drill pipe in the horizontal direction can be set precisely and easily. As a result, a drilled hole is formed as designed, and adjacent ground anchor holes do not intersect as in the related art. According to the second aspect, in addition to this, the depression angle of the drill pipe is set precisely at the same time, so that the operation is simplified.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a side view showing a use state of the embodiment.

FIG. 3 is a plan view partially showing the present embodiment in a use state.

FIG. 4 is a side view for explaining how to use the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drill pipe 2 units 3 Long arm 6 Cross bar 7 Angle indicator 9 Set screw (stopper) 12 Earth retaining wall (digging surface) 15 Horizontal index 26 Depression angle measuring device

Claims (2)

(57) [Scope of request for utility model registration] 1. A base detachably attached to a drill pipe, a base of a long arm extending toward a drilling surface is provided so as to be able to ascend, and a tip of the long arm is provided with a horizontal index provided on the drilling surface. A drill pipe, characterized in that a cross bar to be faced is provided so as to be pivotable, and between the long arm and the cross bar, an angle display device for displaying an angle between the two and a stopper for fixing the angle between the two are provided. Excavation angle setting device. 2. A platform, which is detachably attached to a drill pipe, is provided with a depression angle measuring device for measuring a depression angle of the drill pipe, and a base of a long arm extending toward a drilling surface is provided so as to be able to ascend. At the tip of the, a crossbar facing the horizontal index provided on the excavation surface is provided so as to be pivotable, between the long arm and the crossbar, an angle display device that displays the angle between the two, and the angle between the two A drilling angle setting device for a drill pipe, comprising a stopper for fixing.