JPH01127724A - Suction port covered with box cover of slime treating apparatus with suction port moving along pit bottom - Google Patents

Abstract

PURPOSE:To raise the removing performance of slime by a method in which the body and side covers of a box-like cover are connected with at least a pair of parallel links in such a way that the distance between the outer faces of the cover can be optionally regulate when the side covers come into contact with the bottom of the pit. CONSTITUTION:A box-like cover 101 to cover a suction port consists of a cover body 111, link plates 131 and 132, side covers 121 and 122, upper covers 141 and 142, and back covers 145 and 146. Brackets 114 and 115 are attached to the front and back sides of the upside 112 of the body 111, and brackets 116 are attached to the left and right sides of the lower part 113 and the plates 131 and 133 are also rotatably attached. The slime treating apparatus is introduced to the bottom of an excavated pit, and when the covers 121 and 122 come into contact with the bottom of the pit, its pressing force is regulated and the distance between the outer faces of the covers 121 and 122 is adjusted. The removing performance of slime can thus be raised.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a suction port of a slime processing device used when constructing an underground continuous wall, and in particular, it relates to a suction port for slime processing equipment used when constructing an underground continuous wall, and in particular, to a suction port for sucking slime precipitated at the bottom of an underground excavation hole. This is the suction port of the slime processing equipment that removes the slime.

Conventional technology When constructing an underground continuous wall to be used as a retaining wall or pile, slime that has settled at the bottom of an underground excavation hole for forming an underground continuous wall is removed by sucking it from the bottom of the excavation hole. A removal device has already been proposed in Japanese Patent Publication No. 56-16255.

In the method described in Japanese Patent Publication No. 56-16255, after inserting an iron box cage into an underground excavation hole, a suction pipe (support pipe body) with a suction port connected via a flexible pipe is inserted into a reinforcing bar cylinder.
This is a slime removal device that sucks in and removes the slime that has settled at the bottom of an underground excavation hole through a suction port that corresponds to the width of the excavation hole. This slime removal device has a vertically movable multi-stage jack attached to the lower end of the suction pipe, a support frame attached to the lower end of the vertically movable multi-stage jack, and a pair of horizontally movable multi-stage jacks on each side that extend and retract in the horizontal direction on this support frame. The suction port is attached to the tips of the left and right horizontally moving multi-stage jacks, and the vertically moving multi-stage jacks are gradually compressed, and in synchronization with this, the horizontally moving multi-stage jacks are gradually extended, and the horizontal The suction port attached to the tip of the dynamic multi-stage jack is moved left and right, and as the suction port moves, slime at the bottom of the hole is sucked in and removed.

In addition, at the suction port of the slime processing equipment, which moves the suction port along the bottom of the excavation hole and sucks in slime from the suction port to remove it, the suction port is covered with a box-shaped cover, and this box-shaped cover is placed on one side of the The box-shaped cover is formed by a side cover, a top cover, a rear cover, etc., and the front and bottom surfaces are opened.A water jet nozzle is disposed inside this box-shaped cover, and the water jet sprayed from the water jet nozzle causes the box-shaped cover to open. A suction port of a slime removal device has also been proposed, which stirs the slime precipitated in the slime, mixes the slime with water (stabilizing liquid, etc.), and removes the mixture by sucking it through the suction port.

Problems to be Solved by the Invention In the suction port of the slime removal device, since the width of the suction port or the width of the box-shaped cover covering the suction port is constant, it depends on the width of the underground continuous wall to be constructed. Therefore, it is necessary to replace the suction port or the box-shaped cover, and there is a disadvantage that it is necessary to prepare several types of suction ports or box-shaped covers with different widths.

In addition, in the usual construction method in which a slime removal device is introduced to the bottom of the hole through the passage of an iron box cage inserted into an underground excavation hole, the suction port or box-shaped cover is also introduced to the bottom of the hole through the passage. The width of the box-like cover needs to be smaller than the width of the passage, so that the width of the suction port or the box-like cover is much smaller than the width of the hole bottom, and the width of the box-like cover is much smaller than the width of the hole bottom, and the width of the box-like cover is smaller than the width of the hole bottom. It has the disadvantage that it cannot remove existing slime by sucking it up.

The problem to be solved by the invention of this application is to provide a slime processing device that does not have the above-mentioned drawbacks of the suction port of the slime removal device, that is, to provide a slime processing device that does not have the above-mentioned drawbacks of the suction port of the slime removal device, that is, To provide a suction port for a slime processing device having a box-like cover that can easily accommodate the hole width and having good slime removal performance without leaving any slime present at the corner of the bottom of the hole.

Means for Solving the Problems The invention of this application has a structure in which a suction port is moved along the bottom of an excavation hole, and slime is sucked in at the suction port of a slime processing device that sucks and removes slime from the suction port. The mouth is covered with a box-shaped cover, and this box-shaped cover is composed of a cover body, side covers on both sides, a top cover, a rear cover, etc., and the front and bottom sides are open, and the cover body and each side cover are opened. , the cover body and the side covers are connected by at least a pair of parallel links at vertically spaced positions, and when the slime processing device is introduced into the bottom of the borehole, the outer surface of one side cover and the other side cover are connected. The distance between the outer surfaces of the side covers (i.e., the distance between the outer surfaces of the side covers on both sides) is reduced to a size that facilitates the introduction of the box-shaped cover into the hole bottom, and the lower ends of the side covers on both sides are When the slime at the bottom of the drilled hole is sucked in and removed from the suction port, the distance between the outer surfaces of the side covers on both sides is expanded to a size that approximately matches the width of the hole at the bottom of the hole. This is the suction port of a slime processing device in which a liquid jet nozzle is disposed inside a box-shaped cover to stir the slime that has settled at the bottom of the hole using a liquid jet.

The configuration of this invention will be explained in more detail.

The cover body and each side cover are connected by at least one pair of mutually parallel links at positions spaced apart in the vertical direction of the cover body and side cover, and the pair of mutually parallel links and each of the cover body and side cover The part between the link and the connecting part forms a parallelogram, and the distance between the outer surfaces of the side covers on both sides is reduced by the weight of the side covers, etc. on the link, and the lower ends of the side covers on both sides are The side cover is brought into contact with the bottom, and the side cover is pushed out by the reaction force thereof, thereby increasing the distance between the outer surfaces of the side cover on both sides.

The side cover, top cover, and rear cover that make up the box-like cover are made of metal (for example, steel plate).

Constructed from materials such as synthetic resin.

The links connecting the cover body and the side cover are of the same length or approximately the same length, and the links are, for example, rods,
It consists of a plate etc.

It is preferable that the rear cover is divided into two parts, left and right, and the divided rear cover is fixed to the side covers on both sides.

It is also a good idea to divide the top cover into left and right halves, and attach the divided top cover to a link, a shaft of the link, etc., so that it can be moved as each side cover is opened and closed.

At least one pair of mutually parallel links connecting the cover main body and each side cover is required, but one pair may be provided on each of the front and rear sides of the cover main body. Both ends of each link of the pair of links are rotatably attached to the cover body and side cover by shafts at positions spaced apart in the vertical direction of the cover body and side cover, respectively.

As in the embodiment, in addition to a pair of parallel links arranged at intervals in the vertical direction connecting the cover body and side covers at the front of the cover body, there is also a pair of parallel links arranged at intervals in the vertical direction at the front of the cover body. It is also possible to provide a single, non-paired link.

Function: The invention disclosed herein connects the cover body and each side cover with at least a pair of parallel links at vertically spaced positions of the cover body and side covers, so that slime is not deposited on the bottom of the borehole. When installing the processing equipment, the weight of the side cover etc. will be applied to the link, causing
The distance between the outer surfaces of the side covers on both sides can be reduced to a size that facilitates the introduction of the box-shaped cover into the hole bottom.

In addition, when the lower ends of the side covers on both sides contact the bottom of the hole and the slime at the bottom of the drilled hole is sucked in and removed from the suction port, the distance between the outer surfaces of the side covers on both sides is reduced due to the reaction force of the contact. The size can be expanded to approximately match the width of the hole at the bottom of the hole, and the pressing force when bringing the lower ends of both side covers into contact with the bottom of the hole can be adjusted by adjusting the force (reaction force). , the distance between the outer surfaces of the side covers on both sides of the box-shaped cover can be adjusted as desired.

Embodiment An embodiment of a suction port covered with a box-shaped cover according to the present invention will be described with reference to FIGS. 1 to 4.

The suction port 100 of the slime processing device is covered with a box-shaped cover 110, as shown in FIG.

This box-shaped cover 110 includes a cover body 111, link plates 131, 132, 133, and side covers 121, 1 on both sides.
22, top cover 14, 142, rear cover 145, 1
46 etc., and the front and lower sides are open.

Brackets 114 and 115 that protrude left and right are provided on the front and back of the upper part 112 of the cover body 111 of the box-shaped cover 110, and a pair of brackets 116 and 116 that protrude are provided on the left and right sides of the lower part 113 of the front part of the main body 111. 11
4, 115, the inner ends of the link plates 13, 132 are rotatably attached to the upper shaft E, and a pair of brackets 116, 116 are attached.
In between, the inner end of the link plate 133 is rotatably attached to the lower shaft G. Brackets 123 and 124 are provided protrudingly at the front and back of the upper ends of the opposing surfaces of the side covers 12 and 122 on both sides, and the link plate 13 is attached to these brackets 123 and 124.
, 132 are rotatably attached to the upper shaft F.

In addition, a pair of brackets 125° 125 are protruded from the lower front portions of the opposing surfaces of the side covers 121 and 122 on both sides, and the outer end of the link plate 133 is rotatable by the lower shaft H between these brackets 125. Attach to. Each link board 13,
132 and 133 have the same length between the upper axis E and the upper axis F and the length between the lower axis G and the lower axis H, and the link plate 131, the link plate 133, the cover main body 111 and the length between the lower axis G and the lower axis H are the same. These are arranged so that the quadrilateral EFGH formed by the portion between the shaft supports of each bracket of the side cover 121 (or 122) becomes a parallelogram.

Top covers 14, 142 are arranged on the link boards 13, 132, and the top covers 141, 142 cover the link boards,
It is attached to one or more of the link plates 13, 132, the upper shafts E, F, etc. so that it can rotate in accordance with the rotation of the link plates 13, 13.2. Side cover 121, 122
Rear covers 145 and 146 are fixed to the rear end, the rear end of the side cover 122 is extended rearward by the thickness of the rear cover 145, and the rear cover 146 is attached to the rear end of the extended portion of the side cover 122. The inner end of the rear cover 145 and the inner end of the rear cover 146 overlap each other.

Furthermore, a tube body 101 that constitutes a part of the suction tube body is provided at the rear end of the cover body 110, and the lower part of this tube body 101 is cut diagonally to form a suction port that opens toward the front. Form 100.

A link pivot portion 18, which will be described later, is fixed to the upper portion of the tubular body 1o1 (and main body 111), and the tubular body 101 and a tubular body 20 fixed to the link pivot portion 18 are communicated with each other.

Side covers 12 and 122 on both sides of the box-like cover 110
There are multiple (for example, 4) nozzles 1 inside the bottom of the
A water injection pipe 150 with 51 is provided. This water injection pipe 1
50 is arranged so that each nozzle 151 faces inward.

In addition, if necessary, the water injection pipe 1 is provided with a plurality of nozzles 153 on the lower inner side of the front part of the cover body 111.
52 will be installed.

FIG. 2 shows a state in which the box-shaped cover 110 is sufficiently pressed against the hole bottom, and the parallel link plates 13 and 133 are parallel to the hole bottom, and the outer surface of the side cover 121 and the side cover 122 are parallel to each other.
The distance between the outer surface of That is, the box-shaped cover 110 is in the most open state.

FIG. 4 shows a state in which the slime processing machine is in an excavation hole and the box-shaped cover 110 is suspended from the link pivot portion 18, and the parallel link plates 131 and 133 are the side covers,
The side cover 121 lowers due to the weight of the rear cover etc.
The distance between the outer surface of the side cover 122 and the outer surface of the side cover 122 is minimized.

That is, the box-shaped cover 110 is in the most closed state.

Side covers 121, 122 and rear cover 145.1
When the lower end of 46 contacts the hole bottom, the side covers 121, 122, etc. are pushed apart by the reaction force, so the distance between the outer surfaces of both side covers (i.e., the degree of opening) is determined by the side cover and rear cover. Depending on the degree of depression, it can be varied between the minimum and maximum values.

The suction port of the present invention can be used in any slime processing equipment as long as it moves the suction part along the bottom of an excavation hole and sucks in and removes slime from the suction part. .

A case will be described in which the suction port of the present invention is used in a slime processing device that suctions and removes slime by moving the suction section using a link device.

First, the slime processing equipment to be used is shown in Figures 5 and 6.
Explain using diagrams.

The support tube 1 is made of a steel tube, is arranged so as to be movable up and down, and acts as a support member of the slime processing device, and also acts as a slime discharge pipe.

A main body frame 2 is fixed to the lower end of this support tube 1, and a support body 3 having a center rod 4 at the lower end is fixed to the lower part of the main body frame 2. This center rod 4 is removably fixed to the support body 3.

This center rod 4 rests the weight of the slime processing device on the bottom of the hole, and also positions the processing device so that it does not shift during slime processing.

An elevating frame 5 is disposed within the main body frame 2, and the elevating frame 5 is guided so as to be vertically movable by kite rods 6 installed at the four corners of the main body frame 2.

A pair of hydraulic cylinders 7 (only one shown in the figure) constituting a driving body are fixed to the upper part of the main body frame 2, and a pair of rods 8 (only one shown in the figure) are moved up and down by the hydraulic cylinders 7. The lower end is connected to an elevating frame 5, so that the elevating frame 5 can move up and down as desired.

A pair of sand pumps 9.9 are attached to the lifting frame 5, as shown in FIG. A communication pipe 11 having a T-shaped pipe body 10 is connected to the discharge side of the sand pump 9.9, and the upper part of the communication pipe 11 is slidably fitted to the lower part of the support pipe body 1 via a backing or the like. However, excessive force is not applied to the communication pipe 11 when the elevating frame 5 moves up and down.

A link support 12 is provided at the lower part of the lifting frame 5, facing downward, and a link device is attached to the link support 12. This link device moves the slime suction section along the bottom of the excavation hole.

The link device and the slime suction section are arranged symmetrically, as shown in FIG.

Two long first links 13.13 are arranged symmetrically on the link support 12 at the lower part of the lifting frame 5. each first
The upper ends of the links 13 and 13 are rotatably attached to the front and rear sides of the link support 12 by pivots A, respectively, and each first
The lower end of the link 13.13 is rotatably attached to the link pivot portion 18 of the left or right suction part 17 by a pivot B, respectively.

The upper end of a short second link 14, which is half the length of the first link 13.13, is rotatably attached to the center of each first link 13. It is rotatably attached to the lower part of 3 by means of a pivot. This link device moves the suction part 17 along the bottom of the excavation hole in accordance with the vertical movement (elevating motion) of the elevating frame 5.

Next, the reason why the suction part 17 moves horizontally along the bottom of the excavation hole will be explained.

FIG. 5 shows the state in which the hydraulic cylinder 7 is fully extended, and when the hydraulic cylinder 7 starts to contract from this state,
The lifting frame 5 begins to rise and reaches point A (axis A) in FIG.
is pulled upwards.

Pivots A, B, C, and D are rotatable support points for the linkage, about which link 14 rotates.

If the length of each link is BC=CD=AC, then the angle CA
D=angle ADC and angle CBD=angle CDB.

Therefore, angle CAD decagon CBD = angle ADC + angle CD
B, and angular ACD decagonal CBD+angular ADC decagonal CDB"180deg.

Therefore, angle ADC decagon CDB: 90deg,
Angle ADH=90 degrees.

In other words, if the center rod 4 stands perpendicular to the ground (bottom of the hole), as the hydraulic cylinder 7 expands and contracts, B
The point (pivot B) moves parallel to the ground in the direction of the center rod 4.

Note that FIG. 6 shows a state in which the hydraulic cylinder 7 is completely retracted, and the suction portion 17 is located directly below the main body frame 2 and is in contact with both sides of the center rod 4.

If an expandable link is used as the second link 14, even if the bottom of the underground excavation hole has unevenness along its longitudinal direction, the suction part 17 will not get caught on the unevenness, making it easier. can be overcome.

Moreover, above each of the first links 13.13, a third link 15.
15 (hereinafter referred to as the third link pipe body), and the upper end of the third link pipe body 15.15 is connected to the link support body 1 by a pivot a.
2, and is rotatably attached to the link pivot portion 18 of the left or right suction part 17 by pivoting the lower end of the third link pipe body 15.15, and each third link Pivot C in the center of tube body 15.15 and each first link 1
3.13 is connected to the central axis C by the fourth link 16. Then, if the quadrilateral AabB consisting of the first link 13, the third link pipe body 15, the link support portion 12, and the link pivot portion 17 is made to be a parallelogram, sides Aa
Since the sides Bb and Bb are always kept parallel, the suction part 17 is
It can move horizontally on the hole bottom while always maintaining the same posture.

Since each of the third link tubes 15.15 is constituted by a tube, it constitutes a part of the suction tube through which the slime sucked in by the suction section 17 is sucked into the sand pump 9.9. The lower end of the pipe body 19.19 connected to the suction side of the sand pump 9.9 disposed on the lifting frame 5 is connected to the link support part 1.
2, its lower end is bent at right angles to the link support part 12 to form a pivot a, and the upper end of the third link pipe body 15.15 is rotatably attached to the link support part 12 by this pivot a. . Further, the tube body 20 is fixed to the suction portion 17 and its link pivot portion 18, and the end portion of the tube body 20 is bent at right angles to the link pivot portion 18 to pivot. The lower end of the third link tube 15.15 is rotatably attached to the link pivot portion 18.

In addition, when the third link is not constituted by a pipe body, the suction side of the sand pump 9.9 and the suction part 17 are connected by a flexible pipe or the like.

In this embodiment, a suction port 100 covered with a box-shaped cover 110 of the present invention is used in the suction section 17 of the slime processing apparatus shown in FIGS. 5 and 6.

The water injection pipes 150 and 152 of the box-shaped cover 110 are connected to a small sand pump 45 installed on the upper part of the main body frame 2 via a water supply pipe made of a flexible pipe or the like. If this small sand pump 45 for water jet is installed on the upper part of the main body frame 2, the amount of slime contained in the stabilizing liquid can be reduced.

If the capacity of the water jet sand pump 45 is made too large, the disturbance will be too strong and the slime will not be able to be sucked in completely and there is a risk that it will spread.

According to experimental results, desirable results can be obtained by setting the discharge amount of the water jet sand pump 45 to about 1/4 of the suction amount of the suction sand pump 9.9.

In addition, as shown in FIG. 5, stabilizers 5 and 52 are provided on both sides of the main body frame 2, and the stabilizers 5 and 52 are horizontally moved by hydraulic cylinders (not shown) provided on the main body frame 2. Make it possible to expand and contract in the direction.

Next, how to use the suction port 100 covered with the box-shaped cover 110 according to the embodiment of the present invention will be explained.

As shown in FIG. 7, an elongated underground excavation hole 60 for constructing an underground continuous wall is formed, and this underground excavation hole 60 is filled with a stabilizing liquid.
Insert 1°.

When inserting the reinforcing bar 61 into the excavation hole 60.

As shown in FIG. 8, the reinforcing bars 1161 are placed so that a predetermined distance h (1 to 2 m) is maintained between the lower end 65 of the reinforcing bars 61 and the bottom 66 of the hole by a temporary fixture 70 installed on the ground.
is temporarily placed, and the space between the hole bottom 66 and the lower end 65 of the reinforcing bar 61 is used as a work space for slime processing work.

When the slime processing work is completed, remove the temporary holding tool 70 from the reinforcing bar 61 and place the lower end 65 of the reinforcing bar 61 in the hole bottom 6.
6, fill the excavated hole 6o with concrete, and construct an underground continuous wall.

The reinforcing bar 1!61 is provided with a vertically penetrating framework 62 made of steel, and this framework 62 has a passage 63.64 that leads the slime processing device to the bottom 66 of the excavated hole 6o.
becomes. A plurality of passages 63 and 64 are provided in the reinforcing bar 61 at appropriate intervals, depending on the horizontal movable distance of the box-like cover 110, so that no slime is left behind.

When the hydraulic cylinder 7 is retracted and the elevating frame 5 is raised to its upper limit, the link device of the slime processing device is in a completely retracted state (Figure 6 shows the state just before it is completely retracted), and in this state, When the support pipe 1 is raised to suspend the slime processing device above the ground, a box-shaped cover 1
The distance between the outer surface of the side cover 121 and the outer surface of the side cover 122 of No. 10 is the minimum distance shown in FIG.

The slime processing device in this state is
3, the support tube 1 is lowered, the slime processing device is lowered to a working space near the bottom of the hole, and then stopped. In this stopped state, the slime processing device is stabilized by operating a hydraulic cylinder or the like to press the stabilizers 5 and 52 against the framework 62 of the passage 63, and then
The hydraulic cylinder 7 is operated, the rod 8 is pushed down, and the elevating frame 5 is lowered. Then, the first link 13 and the second link 14 open, and the box-shaped cover 110 (suction part 17) attached to these links 13 horizontally moves outward. When the hydraulic cylinder 7 is fully extended,
The descent of the elevating frame 5 is completed, and the box-shaped cover 110 (suction portion 17) and the like are in the state shown in FIG. 5. In this state, the hydraulic cylinders and the like are operated in reverse to separate the stabilizers 51 and 52 from the framework 62 of the passage 63 of the iron box cage 61.

Then, the support tube 1 is further lowered, and the main body frame 2 is
The center rod 4 of the lower support 3, the side covers 121, 122 of the box-like cover 110, and the rear cover 1
The lower ends of 45 and 146 are brought into contact with the ground of the hole bottom 66.

When the lower ends of the side covers 121 and 122 come into contact with the ground, the parallelogram EFGH is deformed by the reaction force, and the distance between the outer surface of the side cover 121 and the outer surface of the side cover 122 becomes smaller than that of the excavation hole. Expand until it matches the hole width.

In this state, the hydraulic cylinder or the like is operated again to press the stabilizers 5, 52 against the framework 62 to stabilize the slime processing device.

After fixing the slime processing device in a stable state, the slime precipitated near the bottom 66 of the underground excavation hole 60 is removed.

First, the sand pump 9 is operated and the box-shaped cover 110 is removed.
Sucking of slime from the suction port 100 of the inner tube body 101 is started. At the same time as this start, the small sand pump 45 is activated to draw a stable liquid that does not contain much slime into the pump 45, and this stable liquid is sent to each water injection pipe 150, 152. This stabilizing liquid is applied to each nozzle 15 of each water injection pipe 150,152,
153, it is ejected as a water jet. This water jet stirs the slime that has settled inside the box-shaped cover 110. By this stirring, the heavy slime is mixed with the stabilizing liquid etc., this mixture is sucked from the suction port 100 of the pipe body 101, and this mixture is transferred to the pipe body 2o, the third link pipe body 15
, through the pipe body 19 etc., to the suction side of the sand pump 9.9, and from the discharge side of the sand pump 9.9 to the T-shaped pipe body 1.
0 into the support tube 1 through the connecting tube 11.

It is discharged to the ground through this support tube 1.

Suction from the suction port 100 of the pipe body 101 and each nozzle 1
5. While continuing to eject water jet from 153,
By activating the hydraulic cylinder 7 and moving the rod 8 upward at a small speed, the elevating frame 5 is raised, and the first link 13, second link 14, and third link 15 are moved upward.
etc. are moved in the closing direction, and the box-shaped cover 110 is moved at low speed.

Therefore, the left and right box-shaped covers 110 move toward the center rod 4 at low speed while sucking in the mixture and discharging it out of the excavation hole 60.

A state where the lifting frame 5 has finished rising and the link device is completely retracted (Figure 2 shows the state just before it is completely retracted)
When the slime immediately below the slime processing device is removed, the slime removal process in this area is completed. Sand pump 9. Stop operation of 45, stabilizer 5,
52 from the framework 62 and pull up the slime processing device. Then, the slime processing device is moved to the passage 64 next to the iron box basket 61, and the same processing as described above is performed.

Suction port 10 covered with box-like cover 110 of the invention of this application
0 means that the weight of the slime processing machine is the side covers 121, 122 and the rear covers 145, 146 of the box-shaped cover 110.
When applied to the lower end surface of the box-shaped cover 11, the side covers 121 and 122 are always pressed against the hole wall.
Since this may increase the resistance to the lateral movement of the hole or cause the wall of the hole to fall off, the degree of opening of the side covers 121 and 122 is adjusted depending on the wall thickness of the underground continuous wall to be constructed.

By adjusting the pressing force (reaction force) when bringing the lower ends of both side covers into contact with the hole bottom, the distance between the outer surfaces of both side covers of the box-shaped cover can be arbitrarily adjusted. can.

For this purpose, the center rod 4 shown in FIG. 5 is replaced with one having a length that will generate a pressing force depending on the hole width. Then, side covers 121 and 12 of the box-like cover 110
2 (i.e., the distance between the outer surfaces of the side covers on both sides) is kept to a level slightly smaller than the wall thickness.

For this purpose, the center rod 4 is constructed so that it can be detachably fixed to the support body 3. Several types of center rods 4 with different lengths are prepared, and the center rod 4 is selected according to the wall thickness, and the center rod 4 is supported. The box-shaped cover 110 is fixed to the body 3, and the opening amount of the side cover of the box-shaped cover 110 is made to match the wall thickness, and the slime is sucked and removed.

Effects of the Invention The invention of this application has the following effects (i) to vi).

(i) Since the distance between the outer surfaces of the side covers on both sides of the box-shaped cover is adjustable, one box-shaped cover can accommodate various wall thicknesses.

(it) With the distance between the outer surfaces of the side covers on both sides of the box-shaped cover minimized, the slime processing equipment is guided to the bottom of the hole through the passage of the reinforcing bar cage inserted into the underground excavation hole, and the outer surfaces of the side covers on both sides Since the slime can be suctioned and removed by widening the distance between the holes to the extent that the wall is thick, there is no risk of slime being left behind at the corners of the bottom of the hole.

(iu) Since the distance between the outer surfaces of the side covers on both sides of the box-shaped cover can be increased at the bottom of the hole, it is also possible to perform slime removal treatment on an expanded underground continuous wall where the wall thickness near the bottom of the hole is larger than that at the top.

(iv) When using the slime processing device of this invention,
You can completely process slime.

[Brief explanation of the drawing]

Figures 1 to 8 are for explaining the invention of this application in detail. Figure 1 is a front view of the suction port covered with a box-shaped cover of the invention of this application, and Figure 2 is a front view of the suction port covered with a box-shaped cover of the invention of this application. A perspective view showing a state in which the distance between the outer surfaces of the side covers on both sides of the box-shaped cover covering the suction port shown in Fig. 1 is maximized, Fig. 3 is a plan view of the state shown in Fig. 2, and Fig. 4 FIG. 5 is a perspective view showing a state in which the distance between the outer surfaces of the side covers on both sides of the box-shaped cover covering the suction port shown in the figure is minimized, and FIG. Fig. 6 is a partial cross-sectional front view showing the open state at the bottom of an underground excavation hole, and Fig. 6 shows the state of the link device of the slime processing equipment shown in Fig. 5 just before closing, and one side of the link device is indicated by a solid line. Fig. 7 is a plan view showing a reinforcing bar cage inserted into the underground excavation hole, and Fig. 8 is a longitudinal sectional view of the underground excavation hole with the reinforcing bar cage inserted. . In the figure, 1 is a support pipe body, 2 is a main body frame, 3 is a support body,
4 is a center rod, 5 is a lifting frame, 7 is a hydraulic cylinder, 8 is a rod, 9 is a sand pump, 12 is a link support body, 13 is a first link, 14 is a second link, 15 is a third link, 17 is Suction part, 18, link pivot part, 10
0 is a suction port, 101 is a pipe body, 110 is a box-shaped cover, 11
1 is the cover body, 114.115.116.123, 1
24 and 125 are brackets, 121 and 122 are side covers, 13, 132 and 133 are link plates, 1
41 and 142 are upper covers, 145 and 146 are rear covers, 150 and 152 are water injection tubes, 151 and 153 are nozzles, E and F upper shafts, and G and H are lower shafts. Figure 2 Figure 3 7M Figure 4 Figure 5 Figure 7 Figure 8

Claims (1)

[Claims] (1) At the suction port of a slime processing device that moves the suction port along the bottom of the excavation hole and sucks in and removes slime from the suction port, the slime suction port is covered with a box-shaped cover, and this box-shaped cover It consists of a cover main body, side covers on both sides, a top cover, a rear cover, etc., and the front and bottom surfaces are open, and the cover main body and each side cover are
The cover body and the side covers are connected by at least a pair of parallel links at vertically spaced positions, and when the slime processing device is introduced into the bottom of the drilling hole, the distance between the outer surfaces of the side covers on both sides is , the box-shaped cover is reduced to a size that makes it easy to introduce into the hole bottom, and the lower ends of the side covers on both sides are in contact with the hole bottom, and when the slime at the bottom of the drilled hole is sucked in and removed from the suction port. , the distance between the outer surfaces of the side covers on both sides is expanded to a size that approximately matches the width of the hole at the bottom of the hole, and a liquid jet is used to agitate the slime that has settled at the bottom of the hole. A suction port for a slime processing device, characterized in that a nozzle is arranged inside a box-shaped cover.