JP2001011845A - Equipment for introducing sand and sand-like granular materials - Google Patents

Abstract

(57) Abstract: An object of the present invention is to provide a sand and sand-like granular material introduction device capable of suppressing the adhesion of sand or sand-like granular material to a hopper. SOLUTION: An inlet pipe 14 is connected to an upper part of a casing pipe, and a hopper 13 is connected to an upper part of the inlet pipe 14 so that at least a pair of opposing movable plates 21 are pivotally movable to the hopper part 13. A connecting rod 23 pivotally supported by the support portion 22 and having both ends pivotally supported by the movable plates 21 is provided between the movable plates 21. The free end of the rod 25 of the movable plate driving cylinder 24 is supported by one movable plate 21. With such a configuration, it is possible to prevent the sand-like granular material from adhering to the inner wall of the hopper 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hopper provided in an apparatus for forming sand piles or the like used in a sand compaction pile (SCP) method or the like.

[0002]

2. Description of the Related Art Conventionally, as a ground improvement method, there is a sand compaction pile method in which a compacted sand pile is formed in the ground to improve the ground. The sand compaction pile method uses a sand pile or other construction device that vibrates a hollow tube filled with a material such as sand (hereinafter referred to as a sand-like granular material) with a vibrator to penetrate the ground, or rotates the hollow tube. Let it penetrate the ground,
It is constructed using a static sand pile or other forming device that does not use the vibration action.

FIG. 4 shows a sand pile or other forming apparatus in which a hollow pipe is driven to rotate and penetrate into the ground. The sand pile forming apparatus 1 includes a construction machine main body (apparatus main body) 3 provided with crawler carriers 2 on both sides. At the front of the construction machine main body 3, a leader 4 as a support is provided upright. A vertically movable casing pipe (hollow pipe) 5 is suspended from the reader 4. At the upper part of the casing pipe 5, a forced lifting device and a rotation driving device 6 for penetrating the casing pipe 5 while rotating the casing pipe 5 are provided. A hopper 8 is provided on the rotation drive device 6 via an introduction pipe 7 communicating with the casing pipe 5.

The reader 4 is provided with an elevating bucket 9 which can be moved up and down so that sand and sand-like granular material can be put into the hopper 8. FIG. 5 is a perspective view of a main part showing the hopper 8 and the introduction pipe 7. The hopper 8 has a shape in which the upper part is expanded and the lower part is reduced in diameter. A flange 8A is formed at the bottom of the hopper 8, and the flange 8A and the flange 7A formed at the top of the introduction pipe 7 are screwed and fixed together. As a hopper for such a sand pile forming apparatus, for example, one disclosed in Japanese Utility Model Publication No. 53-22413 is known.

[0005]

In recent years, sand and sand-like granular materials used in the sand compaction pile method depend on the place where they are produced. Materials also tend to decrease.
Therefore, when a sand pile or the like for ground improvement is formed using such a sand-like granular material, as shown in FIG. 5, the inner wall of the hopper 8 of the sand pile or the like forming apparatus 1 and the bending of the introduction pipe 7 are formed. In some cases, the sand-like granular material 10 and the like adhered to the portion, making the construction difficult. As a countermeasure, a vibrator is attached to the hopper 8, or the inner wall surface of the bent portion of the hopper 8 or the introduction pipe 7 is coated with a low friction material. Was incomplete.

Accordingly, the present invention can suppress the adhesion of sand and sand-like granular material to the hopper portion and the inlet pipe connected to the hopper portion. It is an object of the present invention to provide an apparatus for introducing sand and a sand-like granular material capable of improving work efficiency at the time.

[0007]

According to the first aspect of the present invention,
Sand and sand are connected to an upper part of a hollow pipe used for forming a sand pile or the like so as to communicate with the hollow pipe, and a hopper is connected to an upper part of the introducer pipe. An apparatus for introducing a similar granular material, wherein a movable plate is movably provided in the hopper portion, and a driving unit for moving the movable plate is provided.

Therefore, according to the first aspect of the present invention, the driving means moves the movable plate in the hopper, and has an effect of preventing sand and sand-like granular material introduced into the hopper from adhering to the hopper. is there.

According to a second aspect of the present invention, there is provided the apparatus for introducing sand and sand-like granular material according to the first aspect, wherein at least one pair of the movable plates is movably opposed to the inside of the hopper. A connecting rod whose both ends are pivotally supported by the respective movable plates is erected between the supported and paired movable plates, and the movable plate or the connecting rod is driven by the driving means. Features.

According to the second aspect of the present invention having such a structure, in addition to the operation of the first aspect, the movable plates forming a pair facing each other are connected to each other by the connecting rods, so that the movable plates have different directions. And the introduction path of the sand or the sand-like granular material in the hopper is not narrowed. Sand and sand-like granular materials can be efficiently introduced into a hollow tube used for forming a sand pile or the like.

[0011] Further, the invention according to claim 3 is based on claim 1.
Alternatively, the sand and sand-like granular material introduction device according to claim 2, wherein the hollow tube is driven to rotate by a forced lifting device and a rotation driving device to penetrate into the ground.

Therefore, according to the third aspect of the present invention, in addition to the effects of the first and second aspects of the present invention, the hollow pipe is driven in rotation and penetrates into the ground, especially with little vibration of the hopper. In addition, sand or sand-like granular material can be reliably introduced into a static sand pile or other forming device.
At this time, since the movable plate only reciprocates by the driving means, unnecessary vibration and noise are not generated.

According to a fourth aspect of the present invention, there is provided the apparatus for introducing sand and sand-like granular material according to any one of the first to third aspects, wherein the driving means is provided outside the hopper. It is characterized by comprising a movable plate driving cylinder arranged, and a rod whose free end is supported by the movable plate or the connecting rod and which is driven in and out by the movable plate driving cylinder.

According to the fourth aspect of the invention having such a structure, in addition to the functions of the first to third aspects, the movable plate driving cylinder drives the rod to extend and retract, and accordingly the movable plate is movable. The plate moves within the hopper. At this time,
Since the pair of movable plates are connected by the connecting rod, they move in conjunction with each other.

According to a fifth aspect of the present invention, there is provided the apparatus for introducing sand and sand-like granular material according to any one of the first to fourth aspects, wherein an air discharge means is provided at a bent portion of the introduction pipe. According to the fifth aspect of the invention having such a configuration, the sand-like granular material is retained in the inlet pipe in addition to the operation of the first to fourth aspects. Can be prevented and smoother introduction can be performed.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of an apparatus for introducing sand and a sand-like granular material according to the present invention will be described below based on an embodiment shown in the drawings.

FIG. 1 is a perspective view of a main part of an introduction device provided in a sand pile or other forming device. FIG. 4 shows a configuration of a sand pile or other forming apparatus excluding a sand and sand-like granular material introducing apparatus of the present embodiment.
Since it is substantially the same as the sand pile forming device shown in FIG.

In FIG. 1, reference numeral 11 denotes an apparatus for introducing sand and a particulate material similar to sand. The introduction device 11 includes an introduction pipe 12 that communicates with a casing pipe (not shown), and a hopper 13 that is connected to an upper portion of the introduction pipe 12.

The introduction pipe 12 includes an inclined pipe 14 inclined obliquely upward from the center axis of the casing pipe, and a vertical pipe 15 which rises vertically from the upper part of the inclined pipe 14. A portion 15A is formed. In addition, the inclined pipe 14 and the vertical pipe 1
Air discharge pipes 17, 17 are provided on both sides of the bent portion 16 at the boundary with 5 so as to communicate with the inside of the introduction pipe 12.

The hopper 13 has a truncated quadrangular pyramid shape, the upper part is an expanding part 18 into which sand-like granular material is charged, and the lower part is gradually reduced in diameter from the expanding part 18 downward, and the inlet pipe 12 is formed. The connecting portion 19 has substantially the same diameter as the upper opening.
The connecting portion 19 is provided with a flange portion 19A. The flange portion 19A is joined to the flange portion 15A of the vertical pipe 15, and is fixed by a tightening means (not shown) such as a bolt and a nut. The hopper 13
The introduction pipe 12 and the introduction pipe 12 may be configured to be integrally formed in advance without using a tightening means.

A pair of opposed inclined plates 2 of the hopper 13
Movable plates 21 and 21 are provided inside 0 and 20 so as to face each other. On both lower sides of each movable plate 21, pivot portions 22, 22 pivotally supported by the inclined plate 20 are provided.
Is provided. The upper portions of the opposing movable plates 21 are connected by connecting rods 23 on both sides thereof. The connecting rod 23 is pivotally supported by each of the two movable plates 21 whose both ends face each other. Further, a hydraulic movable plate driving cylinder 24, for example, of a hydraulic type is fixed to the outside of the one inclined plate 20.
Is driven through the inclined plate 20.
The free end of the rod 25 is supported so as to be connected to one movable plate 21.

Next, the operation and operation of the sand and sand-like granular material introducing device 11 of the present embodiment will be described.

First, as shown in FIG. 4, sand or a sand-like granular material is put into the hopper 13 of the present embodiment from the lifting bucket 9 in a state where the forming device 1 such as a sand pile is installed at a predetermined place. . At this time, for example, as shown in FIG. 2A, the rod 25 is set in a state of protruding from the movable plate driving cylinder 24. At this time, one movable plate 21 stands up (vertical state), and the other movable plate 21 is at a position close to the inclined plate 20 and is inclined.

Subsequently, as shown in FIG. 2B, the sand-like granular material 10 and the like are put into the hopper 8 from the lifting bucket side. At this time, the sand-like granular material 10 falls to the introduction pipe 12 side without adhering to the one movable plate 21 that is standing up, but the sand-like granular material 10 falls on the other movable plate 21 in the inclined state. 10 adheres. When the sand-like granular material 10 is charged, air is supplied to the air discharge pipes 17 to discharge air into the introduction pipe 12 at a predetermined pressure.

Thereafter, as shown in FIG. 2 (c), the movable plate driving cylinder 24 is operated to drive the rod 25 to retract. Then, the other movable plate 21 stands up (vertical state), and the one movable plate 21 comes into a state of being close to the inclined plate 20 (inclination state). Along with this, the sand-like granular material 10 attached to (or placed on) the other movable plate 21 is shaken off and falls to the introduction pipe 12 side. At this time, since air is discharged from the air discharge pipe 17 at the bent portion 16 of the introduction pipe 12, the air is guided to the inclined pipe 14 without stopping and the casing pipe (see FIG. 4).
Introduced to the side.

In the present embodiment, the start of the movable drive of the movable plate 21 and the start of the air discharge operation from the air discharge pipe 17 may be set so as to be linked with the operation of inserting the lifting bucket.

The movable operation of the movable plate 21 is set so as to be repeated in a predetermined cycle in accordance with the amount of the sand-like granular material 10 introduced into the hopper 13.
In the sand-like granular material introducing apparatus of the present embodiment, the sand-like granular material 10
Can be prevented from adhering. For this reason, there is no need to separately perform a removal operation associated with the adhesion of the sand-like granular material 10, and a smooth sand introduction operation can be performed at all times, and the operation efficiency can be improved.

Next, a modification of this embodiment will be described with reference to FIG. In the description of this modification, the same parts as those of the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In the modified example shown in FIG. 3, a movable plate driving cylinder 24 is fixed to the outside of one of the pair of opposed inclined plates 26, 26 of the hopper 13. I have. That is, in this modification, the movable plate driving cylinder 24 is connected to the inclined plate 26 on the side of the one connecting rod 23.
It is arranged and fixed outside of. The rod 25 is set to be parallel to the connecting rod 23. A driving force transmission rod 27 is formed on one connecting rod 23 so as to protrude outward from a long hole 26 </ b> A as a guide hole formed in the inclined plate 26. The free end of the rod 25 is supported by the driving force transmission rod 27. In a modification of such a configuration, the movable plate drive cylinder 24 is
Can be arranged along the outer surface of the movable plate drive cylinder 24 and the installation space can be reduced.
Can be easily fixed. In addition, the long hole 26
Since A is substantially closed by the connecting rod 23, it is possible to prevent sand or the like from coming out of the hopper 13.

Although the present embodiment and its modifications have been described above, the present invention is not limited to this embodiment, and various design changes accompanying the gist of the configuration are possible. For example, in the above-described embodiment, the shape of the hopper 13 is a truncated quadrangular pyramid, but the shape is not limited to this, and various shapes can be adopted. Accordingly, the shape of the movable plate 21 can be appropriately changed.

[0031]

As is apparent from the above description, according to the first aspect of the present invention, since the movable plate is moved in the hopper, the introduced sand-like granular material is prevented from adhering to the hopper. It is possible to provide an apparatus for introducing sand and a sand-like granular material, which can suppress the occurrence of the sand-like granular material and improve the work efficiency when introducing the sand-like granular material into the hollow tube. or,
According to the first aspect of the present invention, the sand-like granular material can be efficiently introduced into a hollow pipe used for forming a sand pile or the like.

According to the second aspect of the invention, in addition to the effects of the first aspect, the movable plates forming a pair are connected to each other by being pivotally supported by both ends of the connecting rod. It does not move in directions different from each other and does not narrow the introduction path for sand or sand-like granular material in the hopper. Sand and sand-like granular materials can be efficiently introduced into a hollow tube used for forming a sand pile or the like.

Further, according to the third aspect of the invention, in addition to the effects of the first and second aspects of the invention, the hollow pipe is driven to rotate, and the hollow pipe is particularly driven to reduce vibrations of the hopper. The sand or the sand-like granular material can be reliably introduced into a penetrating, static sand pile or other forming device. At this time, since the movable plate only reciprocates by the driving means, unnecessary vibration and noise are not generated.

According to the fourth aspect of the present invention, in addition to the effects of the first to third aspects of the present invention, the movable plate driving cylinder drives and retracts the rod, thereby moving the movable plate. Move in the hopper, and the pair of movable plates are connected by the connecting rod, so that they move in conjunction with each other. For this reason, a pair of movable plates can be efficiently driven by one driving unit.

According to the fifth aspect of the invention, in addition to the effects of the first to fourth aspects of the present invention, it is possible to prevent the sand-like granular material from remaining in the introduction pipe,
Smooth installation can be performed, and maintenance can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of an essential part showing an embodiment of an apparatus for introducing sand and a sand-like granular material according to the present invention.

FIGS. 2A to 2C are cross-sectional views illustrating the operation of the introduction device of the present embodiment.

FIG. 3 is a perspective view of a main part showing a modification of the present embodiment.

FIG. 4 is a side view of a sand pile or other forming device.

FIG. 5 is an explanatory perspective view of a main part of a conventional introduction device.

[Description of Signs] 11 Introducing device 12 Introducing tube 13 Hopper 20 Inclined plate 21 Movable plate 22 Pivot part 23 Connecting rod 24 Movable plate driving cylinder 25 Rod

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) E02D 3/08 E02D 3/08 (72) Inventor Yasuaki Negishi 2204-3 Satte, Satte City, Saitama Prefecture (72) Invention Person Yuji Horie 979 Kuno, Owa-cho, Sarushima-gun, Ibaraki Pref. CA04 CA06 CA09 DA06 3F078 AA08 BA02 DB04 EA11

Claims (5)

[Claims] 1. An introduction pipe is connected to an upper part of a hollow pipe used for forming a sand pile or the like so as to communicate with the hollow pipe, and a hopper is connected to an upper part of the introduction pipe so as to communicate with the upper part. Was
An apparatus for introducing sand and sand-like granular material, wherein a movable plate is movably provided in the hopper portion, and a driving unit for moving the movable plate is provided. apparatus. 2. The apparatus for introducing sand and sand-like granular material according to claim 1, wherein at least one pair of the movable plates is movably pivotally opposed to the inside of the hopper and forms a pair. Sand and sand-like granules characterized in that a connecting rod whose both ends are pivotally supported by the respective movable plates is provided between the movable plates, and the movable plate or the connecting rod is driven by the driving means. Material introduction device. 3. The introduction device for sand and sand-like granular material according to claim 1, wherein the hollow tube is driven to rotate by a forced lifting device and a rotation driving device to penetrate into the ground. An apparatus for introducing sand and sand-like granular material, characterized in that: 4. The apparatus for introducing sand and sand-like granular material according to claim 1, wherein the driving means is a cylinder for driving a movable plate disposed outside the hopper. And a rod whose free end is supported by the movable plate or the connecting rod and which is driven in and out of the movable plate driving cylinder. 5. The apparatus for introducing sand and sand-like granular material according to claim 1, wherein an air discharge means is disposed at a bent portion of the introduction pipe. To introduce sand and sand-like granular materials.