Sampling Device

Abstract

To provide a sample collection device which is usable even in a harder stratum.SOLUTION: A sample collection device has: a head part 2 which has an opening 211, and has arranged therein a screw for blocking the opening 211 by tightening; an outer pipe 4 continuously provided in the head part 2; an inner pipe 3 which is stored in the outer pipe 4 and stores a sample therein; and a shoe part 5 which is arranged opposite to the head part 2 of the outer pipe 4 and supports the inner pipe 3 in the outer pipe 4.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a sampling device. [Background technology]

[0002] It is known to take samples from the ground and conduct indoor soil testing, such as for use in the structural design of buildings.

[0003] A known sampler for collecting samples includes, for example, an outer head, a slide unit rotatably connected to the tip side of the outer head via a first bearing, an inner head connected to the tip side of the slide unit, an outer tube connected to the tip side of the outer head, and an inner tube connected to the tip side of the inner head 30, where the slide unit has a shaft guide, a slide shaft, and a spring, and the first bearing and slide unit are responsible for preventing the inner tube from rotating relative to the outer head and for expanding and contracting. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-14707 Summary of the Invention [Problem to be solved by the invention]

[0005] When using samplers on buried soil or gravel-mixed soil, there were many strata where it was impossible to collect samples with the current samplers or where the liner was deformed, making it difficult to collect samples. In one aspect, the present invention aims to be applicable to gravel-containing soil, buried soil, embankment soil, and hard layers that have been difficult to sample with conventional samplers. [Means for solving the problem]

[0006] In order to achieve the above object, the disclosed sample collection device includes a head portion having an opening and a screw for closing the opening by tightening, an outer tube provided continuous with the head portion, an inner tube that is housed within the outer tube and stores a sample therein, and a shoe portion that is disposed on the opposite side of the outer tube from the head portion and supports the inner tube within the outer tube. Effect of the Invention

[0007] In one embodiment, it can also be used in tougher formations. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram showing a sample collecting device according to an embodiment. [Diagram 2] FIG. 2 is an exploded view of the sample collecting device according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, a sample collecting device according to an embodiment will be described in detail with reference to the drawings.

[0010] In order to facilitate understanding of the invention, the position, size, shape, range, etc. of each component shown in the following drawings may not represent the actual position, size, shape, range, etc. Therefore, the present invention is not necessarily limited to the position, size, shape, range, etc. disclosed in the drawings, etc. In the embodiments, elements expressed in the singular form include the plural form unless otherwise clearly indicated in the context. <Embodiment> Fig. 1 is a diagram showing a sample collecting device according to an embodiment of the present invention, and Fig. 2 is an exploded view of the sample collecting device according to an embodiment of the present invention. The sample collecting device 1 of the embodiment has a rod portion 22 , a head portion 2 , an outer tube 3 , an inner tube 4 , and a shoe portion 5 .

[0011] The rod portion 22 connects the outer tube 3 to an impact device (not shown). The length of the rod portion 22 in the longitudinal direction is, for example, about 50 cm, and a plurality of water / air drain holes 221 are formed therein.

[0012] The head portion 2 has one or more water drainage / air vent holes 211. A screw 212 is disposed inside the head portion 2. The water drainage / air vent holes 211 are closed by tightening the screw 212. The screw 212 can be tightened by rotating the rod portion 22 clockwise (a vacuum is created when the screw is fully tightened). The outer tube 3 is provided continuously with the head portion 2. The outer tube 3 may be made of, for example, an iron material.

[0013] The inner pipe 4 is housed inside the outer pipe 3. The material of the inner pipe 4 may be, for example, a custom-made polyvinyl chloride pipe or a stainless steel liner, which has the same outer and inner diameters and length. The end of the inner pipe 4 protrudes from the outer pipe 3, and is about 1 m long.

[0014] The shoe section 5 is disposed on the opposite side of the head section 2 of the outer pipe 4. The diameter of the shoe section 5 is approximately 89.6 mm, the same as the diameter of the outer pipe 4. The inside diameter of the shoe section 5 is basically 75 mm, the same as the inside diameter of the inner pipe 3, but the inside diameter can be φ74 mm, φ73 mm, etc. depending on the stratum. The shoe portion 5 supports the inner pipe 3 within the outer pipe 4. The shoe portion 5 and the outer pipe 4 are connected by a screw type.

[0015] Next, we will explain an example of how to use the sample collecting device 1. For parts that are not explained in the following explanation, please refer to the method described in JIS A 1219. (1) Using a boring survey machine, excavate the ground to the planned sampling depth for samples (fill soil, gravel-mixed soil, etc.).

[0016] (2) The sample collection device 1 is lowered to the depth where sampling is planned. If a hydraulic boring machine is used, the sample collection device 1 is pressed in using hydraulic pressure. If the stratum is difficult to press in, it is inserted using impact. At this time, the screw 212 at the base end is loosened. This allows the sample to enter the inner tube 3.

[0017] (3) When the collection of the sample at the planned depth is completed, the rod portion 22 is rotated clockwise using a pipe wrench or the like (not shown) to tighten the screw. This closes the opening 211 and creates a vacuum inside the inner tube 4. Slowly pull up the sample collection device 1.

[0018] As described above, the embodiment of the sample collection device 1 has the head portion 2 having the opening 211 and the screw 212 arranged thereon to close the opening 211 by tightening, the outer tube 4 provided continuous with the head portion 2, the inner tube 3 housed within the outer tube 4 and storing samples therein, and the shoe portion 5 arranged on the opposite side of the outer tube 4 to the head portion 2 and supporting the inner tube 3 within the outer tube 4. This increases the strength of the outer tube 4, suppresses deformation of the outer tube 4, and makes it possible to collect samples even from strata where collection was previously difficult.

[0019] Although the sample collection device of the present invention has been described above based on the illustrated embodiment, the present invention is not limited thereto, and the configuration of each part can be replaced with any configuration having a similar function. In addition, any other configuration or process may be added to the present invention. Furthermore, the present invention may be a combination of any two or more configurations (features) of the respective embodiments described above. [Explanation of symbols]

[0020] 1. Sampling device 2 Head section 3 Inner tube 4 Outer tube 5. Shoe Section 22 Rod section 211 Water and air drain holes 212 Screw part

Claims

[Claim 1] a head portion having an opening and in which a screw is disposed to close the opening when tightened; an outer tube provided continuously with the head portion; an inner tube that is housed within the outer tube, and that stores samples to be collected inside the device by lowering the device to the depth of the stratum to be sampled with the screw loosened, and that closes the opening and creates a vacuum inside when the screw is tightened with the sample stored inside; a shoe portion disposed on the opposite side of the outer tube from the head portion and configured to support the inner tube within the outer tube; A sample collection device comprising:

Images