JP2002088795A - Soil cutting attachment mounted on bucket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To overcome the problem such that a construction period is extended because it takes a long time to break up backfill soil to a fine state during agitation with a solidification agent when the backfill soil remains in such a clayey state as to include large lumps in the case where the excavated soil is used as the backfill soil for an improved ground. SOLUTION: A soil cutting attachment is mounted on the bucket wherein a plurality of partitioning vertical bars 17 are installed at prescribed intervals in the back-surface opening 16 of a bucket back surface part 11. The attachment has a longitudinally long soil cutting member 2, which has prescribed lateral width in a side view, has prescribed narrow width in a front view and is provided with a cutting blade part 22 at one side edge of the lateral width, and a fixing means 3 for detachably fixing the cutting members 2 to the vertical bars 17. A soil cutting function can be imparted by the cutting member 2 when the attachment is set in the bucket because the cutting members 2 can be fixed to the vertical bars 17 in such a state that the blade part 22 is protruded in the outward direction of the outer surface of the surface part 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an attachment for excavation mounted on a bucket for excavation, and more particularly to an excavation mass used for soil improvement made of soil cement for previously dividing large excavated soil into small pieces. It is intended for attachments for earthcutting.

[0002]

2. Description of the Related Art In recent years, for example, in order to construct a foundation for a heavy-weight building, soil excavated and backfilled, solidified material (cement) and water are mixed and agitated in an excavation hole to improve soil with soil cement. A construction method (generally called a soil cement method) for building a (foundation) is often used.
In this case, it is preferable to uniformly mix the backfill soil and the solidified material from the viewpoint of the strength of the improved ground.

[0003] By the way, there are many clay soils on the ground, and the clay soil excavated by the bucket of the excavator often remains in a massive state. In the conventional soil improvement method (soil cement method), the massive excavated soil is buried in the excavation hole as it is, and the soil (backfill soil), the solidified material, and water are mixed and stirred in the excavation hole. The solidified ground is constructed. Conventionally, a stirrer (rotor with blades) is generally used to stir the soil, the solidified material, and the water in the drilling hole, and the soil, the solidified material, and the water are stirred by rotating the stirring device in the drilled hole. It is often done.

[0004]

However, if the backfill soil for the improved ground remains clayey (hard to loosen) and remains massive, the bulky soil will be in a fine state when agitated by a stirrer in an excavation hole. It takes a long time to divide. That is, in the massive clayey soil, the binding force between the soil components is relatively strong, and when the material containing the massive clayey soil is stirred by the stirrer, the massive clayey soil is removed from its outer layer. It is gradually loosened, but it takes a considerable amount of time to loosen the center of the massive soil. In addition, the stirring operation of each material (soil, solidified material and water) in the drill hole is performed by dividing the entire depth of the drill hole into a plurality of times, but the total stirring time for one drill hole is a considerable time. become. Therefore, conventionally, the longer the stirring time in the excavation hole, the longer the construction period and the higher the cost. In addition, when the stirring time of each material (soil, solidified material, and water) is short in the excavation hole and the soil remains in a lump, the solidified material does not mix uniformly in the soil, and the improved ground to be constructed is constructed. However, the problem that the intensity | strength of this falls will arise.

[0005] In the above-mentioned soil improvement method, in order to shorten the stirring time of each material (soil, solidified material and water) in the excavation hole, the excavated and backfilled soil (clay soil) is divided into small pieces in advance. Although it is effective to do so, the conventional general bucket used for the excavator has only a function of scooping the soil, and it was not possible to cut the excavated large massive soil into smaller pieces.

Incidentally, the inventor of the present application has disclosed in Japanese Patent No. 2954579.
As shown in the issue, "bucket device with earth-cutting function"
This bucket device has a bucket body, and includes a bucket body and a partitioning blade which can enter the bucket body from an opening (soil inlet) of the bucket body. The body and the cutting blade are attached to the extremity of the excavator arm. Then, in a state where the soil (clay soil) is scooped by the bucket body, the large-mass soil in the bucket body can be divided by the cutting blade. By the way, in this known “bucket device with a soil-cutting function”, large-mass soil scooped in the bucket body can be divided by the soil-cutting blade. Since they are integrally mounted, during work that does not require soil cutting (breaking of massive soil) (for example, when simply excavating the soil), the cutting blade may be in the way, and the entire device However, the cost becomes large and the production cost becomes high.

The present invention has been made in view of the above-mentioned conventional problems in performing the ground improvement method, and can be removably attached to an excavating bucket, and the massive soil excavated by the bucket remains as it is. It is an object of the present invention to provide an attachment for partitioning which can be divided into small pieces.

[0008]

The present invention has the following structure as means for solving the above-mentioned problems. still,
The present invention is directed to a method for constructing an improved ground by mixing soil, solidified material, and water, and is directed to an attachment for excavation used to divide large excavated massive soil (clay soil) into small pieces. I have.

[0009] The partitioning attachment of the present invention is attached to a bucket provided with a plurality of vertical rails at predetermined intervals in the width direction of the bucket body in a large-area rear opening provided in the back part of the bucket body. used. This type of bucket with a back opening is generally called a skeleton bucket, and can be used for excavating clay soil, and can also be used for separating debris by a sieving action when dismantling a building or the like. In the bucket with the back opening, the size of the back opening, the interval and the number of vertical rails for the back opening division, and the like vary depending on the size of the bucket body or the application. In addition, there is a back opening portion in which each vertical bar is connected by a horizontal bar and divided into a lattice shape.

[0010] The earth-cutting attachment according to the present invention is a soil which is vertically long and has a predetermined width in a side view, has a predetermined thin width in a front view, and has a cutting edge provided on one side edge of the width. It has a cutting material and fixing means for detachably fixing the soil cutting material to the vertical rail at the back opening.

The size and the number of the earth-cutting members can be appropriately set according to the type of the bucket to be attached (for example, the size of the back opening and the number of vertical rails for division). For example, the size of the partitioning material is such that the lateral width (depth width) in side view is 2
Those having a length of 400 to 700 mm and a width (thickness) of about 30 to 50 mm in a front view can be adopted. The cutting edge of the earth-cutting material is sharpened at an acute angle. The number of the used earth-cutting materials may be attached to all the vertical bars at the back opening, or may be attached to every other vertical bar, or to only one vertical bar when the bucket width is small. You may.

The fixing means may be of any appropriate structure (for example, by fastening with bolts and nuts) as long as it can detachably fix the earth cutting material to the vertical rail.
The fixing means can fix each of the soil cutting members to a predetermined vertical cross along the vertical cross and the cutting blade portion protruding outward from the outer surface of the back surface of the bucket. The length of the earth-cutting material protruding outward from the outer surface of the back surface of the bucket is not particularly limited, but is suitably about 100 to 200 mm.

The earth-cutting attachment of the present invention is applied when the excavated soil (backfill soil) is clay soil when the ground improvement method (soil cement method) is performed.
That is, when the soil at the ground improvement site (foundation construction site) is clayey (or when clayey soil comes out during excavation)
, A soil cutting material is attached by a fixing means along a predetermined vertical rail at a back opening of a bucket (bucket with a back opening) of an excavator. In this state, the cutting edge at the tip is, for example, 100 to 20 mm from the outer surface of the back of the bucket.
It protrudes about 0 mm. When the bucket is excavated, the bucket rotates at the tip of the arm of the excavator. However, the tip of the protruding side (cutting edge) of the partitioning material is located inside the locus of the tip claw on the bottom of the bucket. The excavator does not scratch the soil during excavation work.

Then, the soil is excavated as usual with a bucket of the excavator to form an excavation hole for the improved ground, and the excavated soil is sequentially filled in the vicinity of the excavation hole. By the way, when the excavated soil is clayey, when the excavated soil is buried in the vicinity of the excavation hole by scooping with a bucket, the excavated soil remains in a massive lump. At this time, the arm and the bucket of the excavator are operated to press the cutting edge of the earth-cutting material attached to the back of the bucket from above the large-mass soil, and the large-mass soil is divided by the earth-mass material (or Make deep cuts in massive soil). In addition, when the earth-cutting material is pushed deep into the massive soil, the left and right sides of the earth-cutting material on the back side of the bucket are divided openings in which the rear opening is divided. It is also possible to penetrate into the divided openings and completely separate the large-volume soil with the partition material. In addition, if a plurality of earth-cutting materials are used at appropriate small intervals (for example, an interval of about 150 to 300 mm), it is possible to cut the large-sized soil into smaller pieces by one cutting operation. Note that the massive soil scooped near the excavation depth of the excavation hole may not be scooped out of the excavation hole, but may be divided by the partitioning material on the back surface of the bucket in the excavation hole.

[0015] As described above, if the large-mass soil scooped by the bucket is divided by the dicing material on the back surface of the bucket continuously from the excavation of the soil in the excavation hole by the bucket, the division in the excavation hole is performed. When mixing and stirring the soil, the solidifying material, and the water, the divided soil is reduced in advance, so that it can be performed in a short time to uniformly mix those materials.

Further, since the attachment for digging of the present application can be removed from the bucket, when the digging function is not required at the time of excavation, the attachment for digging can be removed and used as a normal bucket dedicated to digging. Alternatively, the bucket with the back opening can be used, for example, for rubble sorting.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 to 6. A bucket cutting attachment having a back opening 16 in a back portion 11 is shown in FIG.
It is used by being attached to.

In the bucket 1 to which the attachment for earth-cutting of this embodiment is to be attached, a back part 11, a bottom part 12, an upper part 13, and left and right side parts 14, 14 constitute a container-like bucket body 10. Together with the bucket body 10
The brackets 19A and 19B for connecting the tip of the arm 5 of the excavator and the tip of the rod of the hydraulic cylinder 6 are provided near the upper part of the excavator.

A large-area back opening 16 is formed in the back section 11 of the bucket body 10. In the illustrated embodiment, the back opening 16 has a full width between the left and right side surfaces 14 and 14 in the back 11 and a considerable range in the vertical direction (more than 80% of the total height of the back from the lower end of the back 11). Range). The size of the rear opening 16 is not limited to that of the illustrated embodiment.
For example, it may be slightly smaller than that illustrated in consideration of the strength of the bucket body 10.

In this embodiment, the rear opening 16 has
A total of five vertical rails 17, 17,... At predetermined intervals in the width direction of the bucket body, and two horizontal rails 1 at upper and lower intervals.
8, 18 are provided. Therefore, the rear opening 16
Is a total of 18 square-shaped divided openings 16a, 16a
・ ・ It is divided into In this embodiment, the left and right widths of the divided openings 16a defined by the vertical bars 17, 17,... Are set to about 150 mm, but the design can be changed as appropriate.

The left and right side portions 14, 14 of the bucket body 10
, Three insertion holes 15 for inserting the respective connecting rods 31 of the fixing means 3 to be described later are formed at a position close to the back of the fixing means 3 at intervals above and below. Each side 1
3 sets of mutually corresponding insertion holes 15, 1 in 4, 4
5 is each vertical rail 17, as shown in FIG. 3 and FIG.
17 are located slightly on the inner surface side of the bucket than the inner surface.

The attachment for the partitioning of this embodiment has three partitioning members 2, 2, and 2,
2 and 2 are fixed to the vertical bar 17 of the back opening 16.

Each of the partition members 2, 2, 2 is of the same shape and size. Each of the earth-cutting members 2 has a vertically long rectangular shape in a side view and a predetermined thin width in a front view. On one side edge of the earth-cutting material 2, a cutting blade portion 22 sharpened at an acute angle is formed. On the other side edge of the earth-cutting material 2, two left and right side plates 21 and 2 are provided.
1 is formed, and a space 23 having a predetermined depth is formed between the side plates 21 and 21 toward the cutting blade 22 side. This space 23 is for fitting the vertical bar 17 of the rear opening 16. In addition, in the earth-cutting material 2, on the side edge side opposite to the cutting blade portion 22, each of the horizontal bars 18, 18
And a notch 24 for fitting the connecting rod 31 and an insertion hole 2 for inserting a connecting rod 31 which is a part of a fixing means 3 described later.
5 (three at the top and bottom) are formed. Each of the insertion holes 25, 25, 25 is
4 are positioned so as to correspond to the three insertion holes 15, 15, 15 formed.

The lateral cutting material 2 of this embodiment has a left-right width (depth width) of about 300 mm, a vertical length of about 700 mm, and a width (thickness) of about 50 mm in a front view. I have. The size of the partition material 2 can be appropriately changed in design depending on the size of the back opening 16.

In this embodiment, the fixing means 3 has a total of three connecting rods 31, 31, and a total of nine tightening bolts 36, 36,. It is configured. Each connecting rod 31 has a length that extends over both side surfaces 14 of the bucket body 10. Each connecting rod 31 has a large diameter portion 32 at one end and a male screw 33 at the other end. The connecting rod 31 is mounted on one of the side surfaces 14 of the bucket body 10 from the male screw 33 side in a state where the earth-cutting members 2, 2, 2 are mounted on predetermined vertical rails 17, 17, 17, respectively.
, The insertion holes 25, 25, 25 at the same height of the earth-cutting members 2, 2, and 2, and the insertion hole 15 of the other side surface portion 14 of the bucket body 10. It is set by screwing and tightening a nut 34 to the male screw 33 from the outer surface of the side surface portion 14. The connecting rods 31, 3
The reference numerals 1 and 31 are inserted into positions near the inner side of the bucket of each vertical bar 17 provided in the opening 16.

Each of the connecting rods 31 corresponds to the vertical rails 17, 17, 17 on which the respective partition members 2, 2, 2 are mounted, in a state where the connecting rod 31 is set between the side portions 14, 14. At the positions, female screws 35, 35, 35 (three places per one connecting rod 31) into which the fastening bolts 36 are screwed are formed.

Then, the attachment for partitioning of this embodiment is assembled to the back surface 11 of the bucket as follows. First, each of the earth-cutting members 2, 2, 2 is placed on a predetermined vertical rail (three in the illustrated example, three at the center and right and left ends) 17, 17, 17 of the back opening 16 with the back of the bucket. It is fitted from the outside of the part 11. At this time, the vertical bar 17 fits into the space 23 of the partition member 2, and the upper and lower horizontal bars 18, 18 respectively fit into the notches 24, 24 of the partition member 2. Next, the male screw 33 side of each connecting rod 31 is inserted from the outside of the one side surface portion 14 into the insertion hole 15 of a predetermined height, and the insertion holes 25, 25 at the same height of each of the partition members 2, 2, 2. ,
25 and the insertion hole 15 of the other side portion 14, and a nut 34 is screwed and tightened to the male screw 33 from the outside of the side portion 14 (three connecting rods 31, 31, 31 are similarly set). Do). Subsequently, from the inside of the bucket, tightening bolts 36, 36,... Are screwed into the female screws 35, 35,. By pressing against the inner surface of the vertical rail 17, the partitioning material 2 is separated from the fastening bolt 36, the connecting rod 31, and the partitioning material 2.
Can be tightened to the vertical rail 17 through the insertion hole 25. When a total of nine tightening bolts 36 are similarly tightened, as shown in FIGS. 2 to 4, the setting of the partitioning attachment is completed. In this use example, the interval between each of the partition members 2, 2, 2 is about 300 mm, and the cutting blade portion 22 of each of the partition members 2, 2, 2 is attached to the outer surface of the bucket back portion 11 (the horizontal rail 18). 150 to 16
It protrudes about 0 mm.

The setting operation of the attachment for the earth-cutting can be performed either in a state where the bucket 1 is mounted on the tip of the arm of the excavator or in a state before the bucket 1 is mounted on the tip of the arm. When clay soil comes out while excavating the ground with only the bucket 1 that does not use the attachment for soil cutting,
Attachment for soil cutting can be attached to the bucket 1.

As shown in FIGS. 5 and 6, an excavator arm 5
It is used by attaching to the tip of The bucket 1 with the attachment for earth removal is applied when the excavated soil (backfill soil) is clayey soil when performing the ground improvement method (soil cement method).

Then, as shown in FIG. 5, the soil A at the ground improvement site (foundation construction site) is excavated with the bucket 1, and the excavated soil is filled near the excavation hole B (reference C).
When excavating the soil A with the bucket 1, the bucket 1 rotates in an arc around the fulcrum 5a at the tip of the arm 5 as shown by reference numerals 1 'and 1 ". The side tip (cutting blade part 22) is the tip claw 12a on the bottom face of the bucket.
Moves inside the trajectory P of the arc rotation, and the excavator 2 does not scratch the soil A during excavation work. If the excavated soil is clay soil, the soil dropped on the embankment C remains as a massive soil as indicated by reference numeral D. As described above, when the excavated soil is in the state of the large massive soil D, the large massive soil D
In a state in which the back part 11 of the bucket 1 is placed directly above, the arm 5 or the hydraulic cylinder 6 for the bucket is operated to press the earth-cutting material 2 against the massive soil D as shown in FIG. Then, as shown in FIGS. 4 and 6, each of the earth-cutting materials 2, 2, and 2 enters the large-mass soil D, and a plurality of the large-mass soils D in the bucket width direction (four in FIG. 4). ) Or deep groove-shaped cuts Da, Da, Da in the massive soil D
Can be included. Further, when the vertical bar 17 or the horizontal bar 18 of the bucket 1 or the connecting rod 31 enters into the massive soil D, a cut Db is formed on the upper surface side of the massive soil D by each of those members. When the massive soil D is divided into a plurality of pieces in this manner, the volume of the massive soil per piece is reduced, and in a state where the cuts Da and Db are included,
When the stirring operation is performed after returning to the excavation hole B later, the lump shape relatively easily collapses.

As described above, when the bucket with the attachment for the earth-cutting is used, the large-mass soil D scooped by the bucket 1 is continuously transferred from the bucket 1 to the excavation of the soil A in the excavation hole B by the bucket 1. Can be divided by the partition members 2, 2, 2. Therefore, when the divided soil is returned to the excavation hole B and the divided soil, the solidified material, and the water are mixed and stirred, the divided soil is reduced in advance, so that the materials are uniformly dispersed. (In other words, to separate the soil into a fine state) in a short time,
The construction period can be shortened.

Further, since the earthing attachment can be detached from the bucket 1, when the earthing function is not required at the time of excavation, the earthing attachment can be removed to be used as a normal excavating bucket. Alternatively, the bucket with the back opening can be used, for example, for rubble sorting.

In the above embodiment, a total of three connecting rods 31 are used as the fixing means 3, but in other embodiments, one connecting part 31 is omitted by omitting one intermediate part. 31
Alternatively, each of the partition members 2, 2, 2 may be fixed.
Further, the shape of the bucket 1, the shape of the earth-cutting material 2, the fixing means 3
The design of the fixing structure of the earth-cutting material 2 can be changed as appropriate without changing the description in the claims.

[0034]

According to the present invention, an attachment for a partitioning device mounted on a bucket has a partitioning member 2 and fixing means 3 for fixing the partitioning member 2 to a vertical bar 17 of a back opening 16.
The bucket 1 can be detachably attached to the rear portion 11. Then, in a state in which the attachment for earth-cutting is set in the bucket 1, the earth-cutting material 2 on the bucket back surface portion 11 is pressed against the earth-massed soil (clay soil) D excavated by the bucket 1, and Can be divided into smaller pieces.

Therefore, the use of the attachment for digging of the present application makes it possible to easily divide the massive lump D excavated by the bucket 1 with the excavating material 2 continuously with the excavation work, and later to excavate the excavation hole. There is an effect that the mixing / stirring time of the soil, the solidifying material, and the water performed in B can be significantly reduced.

Further, since the earthening attachment has a relatively simple structure, it can be manufactured at a low cost, and can be attached to a ready-made bucket having a back opening, so that the material cost can be reduced. There is also.

Furthermore, even when clay soil comes out during ground excavation work using only the bucket 1, an attachment for soil cutting can be quickly attached to the bucket 1 without removing the bucket 1, so that the bucket 1 can be easily soil-cut. There is an effect that a function can be added.

When the digging function is not required during digging, the digging attachment can be removed to use it as a normal digging-dedicated bucket or to use this backside opening bucket for, for example, rubble sorting. Or you can.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a partitioning attachment according to an embodiment of the present application and a bucket to which the attachment is attached.

FIG. 2 is a perspective view showing a state in which the partitioning attachment of FIG. 1 is assembled to a bucket.

FIG. 3 is an enlarged sectional view taken along the line III-III of FIG. 2;

FIG. 4 is an enlarged sectional view taken along the line IV-IV of FIG. 2;

FIG. 5 is a view showing a use state of the bucket with the attachment for soil cutting shown in FIG. 2;

FIG. 6 is an explanatory view of dividing a large lump of soil by the bucket with the attachment for soil cutting shown in FIG. 2;

[Description of References] 1 is a bucket, 2 is a soil cutting material, 3 is a fixing means, 10 is a bucket body, 11 is a back portion, 16 is a back opening, 17 is a vertical bar, 18 is a horizontal bar, and 22 is a cutting blade. Part, 31 is a connecting rod, 3
6 is a tightening bolt and D is a massive soil.

Claims (1)

[Claims] 1. A back portion (11) of a bucket body (10).
A large area rear opening (16) is provided, and the rear opening (16) is attached to a bucket provided with a plurality of vertical rails (17) at predetermined intervals in the width direction of the bucket body (10). Attachment for earth-cutting, which is vertically long and has a predetermined width in a side view, has a predetermined thin width in a front view, and has a cutting edge portion (22) provided on one side edge of the left-right width. 2) and fixing means (3) for removably fixing the earth-cutting material (2) to the vertical rail (17) of the back opening (16). The fixing means (3) The earth-cutting material (2) is inserted into the specified vertical
7), the cutting edge portion (22) can be fixed in a state of protruding outward from the outer surface of the bucket back portion (11) along the vertical rail (17). Attachment for earthcutting attached to the bucket.