JP2772449B2 - Core sampling device for geological survey and its sleeve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for collecting cores for geological survey and a sleeve for covering the collected cores.

[0002]

2. Description of the Related Art Conventionally, a sleeve formed by coating a core formed in a columnar shape with a bit at the tip of an outer tube inserted into the ground on the tip side of an inner tube is formed into a cylindrical shape with a resin film. It was inserted into the outer peripheral surface of the sleeve case from the tip side and provided with a large number of folds in the form of bellows, and also had a hole smaller than the outer diameter of the core and the outer diameter was formed to be approximately the same diameter as the sleeve. The sleeve and the core elevator are integrally connected by inserting a cylindrical core elevator into the rear end of the sleeve and tightening the core elevator with a rubber band or the like from the outside. When the sleeve case set in this way is inserted into the distal end of the inner tube and the inner tube is inserted into the outer tube to collect the core, the core that has risen inside the inner tube from the distal end of the inner tube has a sleeve at its rear end. By pushing up the core elevator inside, the sleeve is extended from the storage section and covers the core sequentially.

[0003]

However, in this conventional core collecting apparatus, since the sleeve itself does not have the core locking portion, every time the sleeve is replaced, the core elevator, which becomes the core locking portion, needs to be attached or removed. Since it has to be removed, it takes a lot of trouble, and when the core elevator is removed, there is a problem that the collected core may be partially damaged. In addition, there is a problem in that the cost is increased due to the necessity of the core elevator, and care and storage management are troublesome. The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide a core elevator which has to be attached to or detached from a sleeve so as to be engaged with a rising core. It is an object of the present invention to provide a geological survey core collecting device and a sleeve thereof, which are unnecessary and can simplify the work procedure, and do not damage the collected core.

[0004]

According to a first aspect of the present invention, there is provided a geological survey core collecting apparatus for removably inserting an inner pipe into a distal end side of an outer pipe. The outer tube is inserted into the ground with the flexible sleeve stored in the annular storage portion provided on the distal end side of the tube, and the outer tube is rotated by a driving unit on the ground to form a core with a bit provided at the distal end of the outer tube. Forming a core, and collecting the core inside the inner pipe while covering the core with a sleeve that is fed out of a storage part, wherein an opening smaller than the outer diameter of the core is provided at the rear end of the sleeve. And a locking portion locked to the rear end of the core.

According to a second aspect of the present invention, there is provided the core collecting apparatus for geological survey according to the first aspect, wherein the sleeve has an opening at a rear end portion smaller than an outer diameter of the core. The core has a locking portion that is locked to the rear end of the core, and an upright piece is provided in the locking portion to open the locking portion in an upright state when the sleeve is stored in the storage portion.

According to a third aspect of the present invention, there is provided a geological survey core collecting device, wherein the core formed by the bit inserted into the ground is collected while covering the core with the sleeve drawn out from the storage portion of the inner tube. In the sleeve of the investigation core collecting device, the sleeve is formed in a cylindrical shape with a flexible resin film, and has an opening at a rear end portion smaller than the outer diameter of the core and is locked to the rear end portion of the core. An upright piece is provided in the locking portion, the locking portion being provided with a locking portion to be opened when the sleeve is stored in the storage portion.

[0007]

In the geological survey core collecting apparatus according to the first aspect of the present invention, the rear end of the sleeve has an opening smaller than the outer diameter of the core and has a locking portion which is locked to the front end of the core. When the core formed by the bit at the tip of the outer tube rises inside the inner tube from the tip of the inner tube, the rear end of the core comes into contact with the locking portion of the sleeve and pushes up the sleeve. Draws out from the storage section and sequentially covers the core. After the core is collected, there is no core elevator at the rear end of the core, so that the core can be stored as it is. Further, the sampling operation can be continued without attaching the core elevator to the sleeve.

In the geological survey core collecting device according to the second aspect, when the sleeve is formed of a flexible material, the sleeve can be easily attached to the storage portion and can be smoothly pulled out from the storage portion at the time of core collection. However, in this case, the locking portion may fall down at the time of attachment to the storage portion, and may seal the opening. Then, at the time of collecting the core, the sleeve is automatically extended by the pressure of the fluid and cannot cover the core accurately, but this is prevented by using the sleeve provided with the upstanding piece at the locking portion, and the core collection fails. Can be carried out satisfactorily without any problems.

In the sleeve of the geological survey core collecting device according to the third aspect, the core can be easily attached to the storage portion, and when collecting the core, the core is engaged with the rear end of the core and smoothly fed out. In addition, the core can be coated very accurately by escaping the fluid.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing a main part of a geological survey core sampling device A of the present embodiment, FIG. 2 is a cross-sectional view showing a state in which a sleeve collar is extended to an inner pipe of the same, and FIG. FIG. 4 is an explanatory view showing a main part of the sleeve, and FIG. 5 is a sectional view showing a core housed in an inner tube of the same. The geological survey core collecting apparatus A of the present embodiment includes an outer pipe 1, a bit 2, an inner pipe 3, a sleeve collar 4, a sleeve case 5, a sleeve 6, and a shoe 7.
And the main configuration.

The outer tube 1 rotates the bit 2 with a power unit installed on the ground in a state in which the inner tube 3 and the sleeve 6 are housed, and has a rear end screwed to the outer tube head 10 and Is transmitted. In the figure, reference numeral 11 denotes a shaft for transmitting the pressing force of a spring (not shown) provided at the rear to the inner tube head 32. Although not shown, the shaft 11 is formed so that the rotation of the outer tube 1 is not transmitted by the bearing of the swivel joint provided at the rear.

The bit 2 is for cutting the ground into a columnar shape to form a core 8. The bit 2 is formed in a cylindrical shape, and a hard blade 20 is fixed to a tip end surface. Screwed to the tip.

The inner pipe 3 is for accommodating therein a core 8 formed in a columnar shape by a bit and for forming a water passage with the outer pipe 1, wherein the outer diameter is smaller than the inner diameter of the outer pipe 1. It is formed in a cylindrical shape with transparent acrylic resin so as to be slightly smaller. In the figure, reference numeral 30 denotes a water channel formed between the outer tube 1 and the inner wall. Further, a smooth fitting hole 31 is formed at the rear end of the inner tube 3, and the inner tube 3 is formed so as to be detachably attached only by being inserted into a smooth boss 33 provided in the inner tube head 32. . In addition, a smooth boss 34 is formed at the tip. In the figure, reference numeral 35 denotes an inner diameter portion of the inner tube 3. Reference numeral 36 denotes a cap for closing the openings at both ends of the inner tube 3 after core collection.

The sleeve collar 4 extends the inner tube 3 toward the front end and serves as a mounting portion for the sleeve case 5. The sleeve collar 4 is formed of a stainless steel tube having the same size as the inner tube 3, and has a rear end portion. Is inserted into the boss portion 34 of the inner tube 3 so as to be detachably attached. Further, an inner diameter expanding portion 41 is provided at the front end portion, and a step portion 43 with the inner diameter portion 42 at the rear end portion is formed on a gentle slope.

The sleeve case 5 serves as a holding portion of the sleeve 6, and has a smooth boss portion 50 which is detachably attached to a substantially middle portion by simply inserting the sleeve case 4 into the enlarged inner diameter portion 41 of the sleeve collar 4. It has a cylindrical shape. The rear end side outer diameter portion 51 is formed to have substantially the same size as the inner diameter portion 42 of the sleeve collar 4, and has an annular sleeve storage portion 52 between the outer diameter portion 51 and the inner diameter expansion portion 41.
Are formed. 53 in the figure is a sleeve 6
This is the delivery port.

The sleeve 6 inserts and protects the core 8 formed by cutting out the bit 2, and is made of a flexible and elastic transparent polyethylene resin film, and has an outer diameter on the rear end side of the sleeve case 5. It is formed in a cylindrical shape having an inside diameter slightly smaller than that of the portion 51. In the figure, reference numeral 60 denotes a cylindrical tip of the sleeve 6. A rear end portion 61 of the sleeve 6 is formed into a flat end by forming an end opening 62 having a diameter d smaller than the outer diameter D of the core 8 by welding both end corners in a tapered shape in a state of being folded flat. Is provided. In the figure, 64 is a welded portion forming the locking portion 63,
Reference numeral 80 denotes a rear end of the core.

The shoe 7 forms the water channel 30 up to the bit 2 and forms the inlet 70 of the core 8, and is removably inserted into the distal end of the sleeve case 5.

As shown in FIG. 1, the sleeve 6 of this embodiment is inserted into the outer diameter portion 51 of the sleeve end 6 from the side of the cylindrical tip 60 to form a large number of small bellows-like folds. Approximately the entire length is accommodated, and the locking portion 63 is arranged so as to face the rear end of the sleeve case 6. Then, the bellows-like folded portion of the sleeve 6 is stored in the sleeve storage portion 52, and the sleeve case 6
Is attached to the tip of the sleeve collar 4 for use.

Next, the operation of this embodiment will be described. First, after assembling as shown in Fig. 1, insert it into the ground from the bit 2 side,
The outer tube 1 is rotated while supplying water to the water channel 30. The core 8 formed into a cylindrical shape by the bit 2 is inserted into the inside of the sleeve case 5 from the introduction port 70 of the shoe 7, and its end abuts on the locking portion 63 of the sleeve 6. In this case, air and excess water are discharged from the end opening 62. And
As the core 8 is extended and inserted, the rear end 8 of the core 8
0 comes into contact with the locking portion 63 and pushes up, and the sleeves 6 in the sleeve storage portion 52 are sequentially fed out from the feeding port 53 to insert the entire length of the core 8. In addition, the core 8 that continues to grow is
While being inserted into the sleeve 6, the inner tube 3 is moved up and stored for a predetermined length. After collecting the core for approximately the length of the sleeve 6, the device is pulled up to the ground, the bit 2 is removed from the outer tube 1, the inner tube 3 is pulled out, and both ends of the inner tube 3 are sealed with caps 36 while the core 8 is housed. . Then, the next core is collected using a new inner tube until the required length is obtained. Further, the core 8 is carried into a predetermined place while being stored in the inner tube 3, and the core 8 is observed from outside the inner tube 3.

As described above, according to the present embodiment, since the inner tube 3 for accommodating the core 8 inserted and collected in the transparent sleeve 6 is formed transparent, the inner tube 3 is moved from the inner tube 3 to the core 8.
The core can be observed without removing the core. In this case, even if the sleeve 6 is broken, the observation can be performed with the defective portion kept to a minimum. Further, since the inner tube 3 may be transported as it is, handling is easy. Further, since the inner tube 3 is formed of an acrylic resin, the inner tube 3 is lighter in weight than metal, and the strength required for the inner tube is sufficiently obtained, and there is no rust or deformation, so that handling and maintenance management are easy. .

Further, in the embodiment, the locking portion 63 is formed such that the end opening 62 is smaller than the outer diameter of the core 8 by welding the two corners of the rear end of the sleeve 6 in a tapered shape. When the core 8 is lifted, the locking portion 63 is locked to the rear end portion 80 of the core, and the sleeve 6 is extended while inserting the core 8, so that the conventional core elevator becomes unnecessary and no complicated setting is required. Therefore, cost reduction and labor saving can be achieved. The rear end 61 of the sleeve 6 is provided with an end opening 62 smaller than the outer diameter of the core 8, so that when the apparatus is lowered to the bottom of the hole or when the core is raised, air or extra The water pressure can be released, so that the rear end portion 80 of the core 8 is properly in close contact with the locking portion 63, and the feeding of the sleeve 6 can be performed in order. Further, since the sleeve 6 is formed of a polyethylene resin film, when the sleeve 6 is inserted into the rear end side outer diameter portion 51 in a state where the inner diameter is slightly enlarged, an appropriate resistance is generated and the feeding can be performed in order. . Also,
Insertion can also be simplified.

Further, since the inner tube 3 containing the core 8 is sealed at both ends with caps 36, evaporation of water in the core can be prevented.

Next, a second embodiment will be described in detail with reference to FIGS. FIG. 8 is an explanatory view showing the procedure of providing the upright pieces on the sleeve of this embodiment in the order of (a), (b), and (c). The present embodiment is characterized in that the upstanding piece 65 is provided on the locking portion 63a of the sleeve 6a. The locking portion 63
a is formed by welding the rear end portion 61a in a tapered shape in the same manner as in the first embodiment. In this case, the sleeve 6a can be easily attached to the storage portion, and at the time of core collection, Use a 0.04 mm thick flexible EVA (ethylene vinyl acetate copolymer) film pouch so that it will unfold accurately. Then, before forming the locking portion 63a, a stiff polyethylene (LL) film having a thickness of 0.15 mm is folded in half and inserted into the rear end portion 61a as shown in FIG. An upright piece 65 having an opening 62 is also provided at the same time by forming a locking portion 63a by integrally welding both sides in a tapered shape (see FIG. 2B). In the figure, reference numeral 66 denotes a heat welding portion. Reference numeral 67 denotes a coloring line provided at the center of the entire length of the sleeve 6a, and is a marker for checking whether the sleeve is twisted at the time of setting. Except for the above, the configuration is the same as that of the first embodiment, and a description thereof will be omitted. Next, the setting procedure of the sleeve 6a will be described with reference to FIG. First, when the head 54 is pressed, the peripheral wall portion 55
A jig C having the same outer diameter as 1 is inserted from below the sleeve case 5, and after inserting the distal end portion 60 of the sleeve 6a from above, the head 54 is pressed to utilize the enlarged peripheral wall portion 55. It is inserted into the rear end outer portion 51. After inserting the entire length of the sleeve, the setting can be completed very easily by pulling out the jig C downward.

As described above, in this embodiment,
Since the sleeve 6a is formed of a thin and flexible EVA, the sleeve 6a can be easily set in the storage portion, and can be smoothly pulled out and covered with the core when collecting the core. In addition, since the upstanding piece 65 having a strong waist is provided on the locking portion 63a, after setting, the upstanding piece 65 raises the locking portion 63a and does not seal the opening. It can be carried out.

Although the embodiment of the present invention has been described in detail, the specific structure of the present invention is not limited to this embodiment, and there are design changes and the like without departing from the gist of the invention. Are also included in the present invention. For example, in the embodiment, the sleeve collar 4 made of stainless steel is provided to extend at the tip of the inner tube 3. However, the present invention is not limited to this, and a portion corresponding to the sleeve collar may be formed integrally with the inner tube 3 using acrylic resin. . In addition, the shape of the connecting portion at both ends and the like can be arbitrarily set, such as a screw-in type.

In the embodiment, the inner tube 3 is made of acrylic resin. However, the present invention is not limited to this, and the material of the inner tube can be arbitrarily set to metal or the like.

Also, a scale can be provided on the inner tube 3 over substantially the entire length. In this case, a necessary portion of the core can be measured immediately without a measure or the like at hand. The scale can be set arbitrarily. Also, a column for entering necessary items may be provided.

Further, in the embodiment, the sleeve 6 is formed such that the locking portions 63 for locking the ends of the core 8 are formed by welding the both end corners in a tapered shape, but the present invention is not limited to this. Stop 6
The shape of 3 can be arbitrarily formed as long as it has an opening. For example, only one side of the sleeve 6 may be formed in an inclined state to provide the locking portion. Also, FIG.
As shown in FIG. 7, a substantially T-shaped pattern 9 having a band portion 90 and a rising portion 91 is formed of elastic thin paper or the like coated with a resin film, and the band portion 90 is sleeved. 6, wrapped around and bonded to the rear end, bent up the rising part 91,
The locking portion 63 may be provided by adhering to the belt portion 90 so as to close the center of the opening. In this case, it is possible to prevent the opening 62 from closing during use.

In the embodiment, the sleeves 6 and 6a are made of polyethylene or EVA resin film.
The material and thickness of the sleeve are not limited to this, and can be set arbitrarily.

The upright piece 65 is made of polyethylene, but the material and thickness of the upright piece are arbitrary. The shape and the manufacturing process are also arbitrary.

[0031]

As described above, the first aspect of the present invention is as follows.
In the geological survey core sampling device described above, a core elevator which must be attached to and detached from the sleeve is not required, so that the operation procedure can be simplified and the cost can be reduced. In addition, the core after the collection can be handled without being damaged, and the effects such as extremely easy handling can be obtained. In the core sampling device for geological survey according to claim 2, since the locking portion rises with the rising piece in a state where it is set in the storage portion, the opening is not sealed and the fluid easily escapes. In addition, there can be obtained an effect that the core collecting operation can be performed extremely well. In the sleeve of the geological survey core collecting device according to claim 3, since the above configuration is adopted, anyone can easily attach the storage portion to the sleeve, and the core is locked to the rear end portion of the core when collecting the core. And the core can be coated very accurately by releasing the fluid pressure.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a main part of a geological survey core collecting apparatus according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state in which a sleeve collar is extended from the inner tube according to the first embodiment.

FIG. 3 is a sectional view showing the sleeve case of the above.

FIG. 4 is an explanatory diagram showing a main part of the sleeve according to the first embodiment;

FIG. 5 is a sectional view showing a core housed in the inner tube of the above.

FIG. 6 is a plan view showing a locking portion forming pattern according to another embodiment.

FIG. 7 is a perspective view showing a locking portion of the same.

FIG. 8 is an explanatory view showing the procedure of providing the upright pieces on the sleeve of the second embodiment in the order of (a), (b), and (c).

FIG. 9 is an explanatory diagram showing a setting procedure of the sleeve according to the third embodiment.

[Explanation of symbols]

 Reference Signs List A core extraction device for geological survey d sleeve end opening diameter D core outer diameter 1 outer tube 2 bit 3 inner tube 6 sleeve 6a sleeve 8 core 52 sleeve storage section 61 sleeve rear end 61a sleeve rear end 62 end opening (opening) 62a opening 63 locking part 63a locking part 80 core rear end

Claims (3)

(57) [Claims] Claims: 1. An inner tube is detachably inserted into a distal end side of an outer tube,
A bit provided at the tip of the outer tube by inserting the outer tube into the ground with the flexible sleeve stored in the annular storage portion provided on the tip side of the inner tube, and rotating the outer tube by the drive unit on the ground And forming a core at the same time, and collecting the core inside the inner pipe while covering the core with a sleeve that is fed out of a storage part. A core sampling device for geological investigation, comprising: a locking portion having an opening and locked to a rear end portion of the core. 2. The core extraction device for geological survey according to claim 1, wherein said sleeve has an opening at a rear end portion smaller than an outer diameter of said core and is locked to said rear end portion of said core. A core sampling device for a geological survey, comprising: an upright piece provided with a portion, and an upright piece for opening the latching portion when the sleeve is stored in the storage portion. 3. A core of a geological survey core collecting device, wherein a core formed by a bit inserted in the ground is covered with a sleeve extended from a storage portion of an inner tube, and the core is collected. The film is formed in a cylindrical shape, and the rear end has an opening smaller than the outer diameter of the core, and has a locking portion that is locked to the rear end of the core. A sleeve for a geological survey core collecting device, wherein an upright piece is provided in the locking portion so that the locking portion is raised and opened when stored.