JPS6327487B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sand pile construction device for constructing sand piles in soft ground in order to improve soft ground. To provide a sand pile building device that can perform noiseless work without using a noise-generating vibrator or the like, and can set the center of gravity of the device at a low position to perform work in a stable state.

Figure 1 shows an overall front view of the sand pile making device, and Figure 2 shows a side view of its main parts. In these figures, 1 is suspended from the top of the leader 2 via a wire (not shown). The machine frame is supported by the guide rail 3 of the leader 2 via a guide so as to be able to rise and fall freely, and a sand charging hopper 5 is installed at the bottom of the machine frame 1.
is integrally equipped. 6 is a rectangular cylindrical casing,
The hopper 5 is rotatably connected to the lower end of the hopper 5, and 7 is a rotary drive means that transmits rotational force to the casing 6 while allowing the casing 6 to move up and down, and is fixed to the lower part of the leader 2. It is provided on the support frame 8. 9 is a cylindrical middle tube, which is inserted concentrically into the casing 6;
A sand insertion passage 10 is formed between the inner tube 9 and the casing 6, and the upper end of the middle tube 9 extends through the inside of the hopper 5 to the lower end of the machine frame 1, where it is rotatably supported. This middle tube 9 has a plurality of (for example, four) connecting plates 1 disposed at intervals in the circumferential direction at the upper end and middle part.
1 . . . , 12 . 13 is a cylindrical inner tube (which may be hollow or solid) inserted into the middle tube 9; the upper end of this inner tube 13 extends further upward beyond the upper end of the middle tube 9; The inner tube 13 extends further downward beyond the inner tube 13.
is interlocked and connected to an air spring device 14 which is installed in the machine frame 1 and serves as a vertical vibration means for vertically vibrating between predetermined strokes.
is designed to vibrate vertically with the same stroke as the air spring device 14, that is, with the same amplitude. Further, in the lower part of the inner tube 13, there are an upper abutment part 16 and a lower abutment part 17 that abut against a stopper part 15 provided at the lower end of the middle tube 9 when the inner tube 13 vibrates up and down. They are integrally provided at predetermined intervals, and only the upper abutment part 16 abuts the stopper part 15 when the casing 6 is driven in, and only the lower abutment part 17 abuts the stopper part 15 when the casing 6 is pulled out.
The downward impact force generated by the impact of the upper abutment part 16 on the stopper part 15 is transmitted from the middle pipe 9 to the casing 6 via the connecting plates 11 and 12. The casing 6 is driven into the ground by the downward impact force acting on the casing 6, and the lower impact portion 1
7 hits the stopper portion 15, an upward impact force is generated on the middle tube 9, and this upward impact force is transmitted to the casing 6 through the connecting plates 11 and 12, thereby promoting the pulling out action of the casing 6. become. As is clear from FIGS. 1 and 3, the rotation driving means 7 has four guide rollers 19 placed inside a hollow cylindrical rotating body 18 through which the square cylindrical casing 6 can be inserted. Each guide roller 19 is rotatably mounted on a pin 20, and a gear 21 is mounted on the outer periphery of the rotary body 18, so that the outer circumferential surface, that is, the four side surfaces thereof, can be rotated and arranged so as to surround the casing 6. The cylindrical rotating body 18 is rotatably attached to a hollow cylindrical base 22 fixed on the support frame 8 extending from the leader 2 side via a bearing 22a. At the same time, the guide rollers 19 are rotatably supported on each of the four sides of the rectangular cylindrical casing 6,
A gear 21 is mounted on the outer periphery of this rotating body 18, and an output shaft 24 of an electric motor 23 installed on the support frame 8.
The rotation of the output shaft 24 rotates the rotating body 18 via the gears 25 and 21, thereby allowing the rectangular cylindrical casing 6 to move up and down. I'm trying to rotate it. Incidentally, since the rectangular cylindrical casing 6 is integrally connected to the middle tube 9 by the connecting plates 11 and 12, it rotates together with the middle tube 9 and moves up and down.

Further, the machine frame 1 has four pillars 27 erected at the four corners of the lower frame 26, and an upper frame 28 is fixed to the upper ends of these columns 27. An air spring device 14 is installed between the upper and lower frames 28 and 26 of the lower frame 26, and the upper end of the middle tube 9 is rotatably held in the center of the lower frame 26 via a bearing device 29. The air spring device 14 is
Pillar 27...The movable base 30 is attached so that it can slide up and down,
Four downward movement air springs 31 are interposed between the movable table 30 and the upper frame 28 in a state that they are fitted onto each support column 27, and upward movement air springs 31 are interposed between the movable table 30 and the lower frame 26. Similarly, four springs 32 are interposed, and a branch pipe (not shown) from an air distribution pipe (not shown) is connected to the downward movement air spring 31.
Similarly, branch pipes from the air distribution pipes are connected to the upward movement air spring 32, and air compressors (not shown) are connected to the air supply ports and exhaust ports (not shown) provided in each of these air circulation pipes. An air hose, etc. (not shown) is connected through a solenoid valve (not shown), and by switching the solenoid valve, air from the compressor is alternately pressed into the lower air spring 31 and the upper air spring 32. The lower moving air spring 31 and the upper moving air spring 39 are alternately expanded and contracted by stretching and pulling out, thereby vertically vibrating the movable base 30 between the lower mount 26 and the upper mount 28 with a predetermined stroke. It is composed of The upper end of the middle tube 9 is fixed to the movable table 30 of the machine frame 1, and the vertical vibration of the movable table 30 caused by the operation of the air spring device 14 causes the inner tube 13 to move up and down with the same stroke as the movable table 30. It will vibrate. The above air spring device 1
4, a limit switch (not shown) that is energized and operated only when the casing 6 is driven in, and a limit switch (not shown) that is energized and operated only when the casing 6 is pulled out, is installed on the side of the air springs 31 and 32, for example, on the movement path of the movable base 30 that moves up and down at 4. A limit switch (not shown) for driving is provided, and a limit switch for driving is installed appropriately before the end of the stroke in the upward stroke of the movable base 30, and a limit switch for withdrawing is installed at the end of the stroke in the downward stroke of the movable base 30. These limit switches are electrically connected to the solenoid valves interposed in the air flow pipe of the air spring device 14. When driving the casing, when the movable base 30 descends to the end of its downward stroke, the upper abutment part 16 hits the stopper part 15 of the middle pipe 9 due to the lowering of the inner pipe 13, but the movable base 30 does not rise. Sometimes, this movable platform 30 is stopped from rising by kicking the limit switch before reaching the end of its upward stroke, thereby preventing the lower abutment section 17 of the inner tube 13 from abutting against the stopper section 15, and then The same operation is repeated so that only the upper abutting portion 16 abuts against the stopper portion 15 of the inner tube 13 during the casing driving. In addition, when pulling out the casing, when the movable base 30 is lowered, the lowering is limited by a limit switch before reaching the end of its stroke.
7 is adapted to abut against the stopper portion 15 of the inner tube 13.

Note that as the vertical vibration means, an air cylinder device or a hydraulic cylinder device can be used instead of the air spring device 14 described above.

When operating the sand pile making device having the above-described configuration, first, the machine frame 1 is suspended from the top of the leader (not shown) at an appropriate height, and the guide 4 is suspended from the top of the leader (not shown).
The casing 6 is supported by a guide rail 3 via a rotary drive means 7 to continuously rotate the casing 6, and the air spring device 14 is activated to vertically vibrate the middle tube 13. From this state, the lifting operation wire (not shown) is let out to lower the machine frame 1, and the middle pipe 9 is moved by the rotation of the casing 6 and the impact of the upper abutment part 16 against the stopper part 15. The downward impact force acting on the casing 6 through the casing 6 causes the casing 6 to penetrate into the ground. After penetrating the casing 6 into the ground to a predetermined depth in this way, the Watsupur 5
While putting more sand into the sand insertion passage 10 between the casing 6 and the middle pipe 9, the machine frame 1 is gradually raised by winding the lifting operation wire, and the casing 6 is pulled out. During this pulling operation, the rotation action of the casing 6 and the vertical vibration action of the inner tube 13 are performed in the same manner as during driving.
Contrary to when driving, only the lower abutment part 17 is made to abut against the stopper part 15, and the upward force acting on the casing 6 due to the continuous rotation of the casing 6 and the impact of the lower abutment part 17. The casing 6 is pulled out from the ground by the impact force. In this case, the sand introduced into the sand insertion passage 10 is supplied to the lower part of the casing 6, where it is pushed out while being compacted by the head 33 of the inner pipe 13, and as the casing 6 rises, it forms a dense and strong sand pile. form. In addition, in the above-mentioned driving operation and pulling operation, the upper abutting portion 16
The impact sound when the lower impact part 17 hits the stopper part 15 is emitted within the casing, so the sound is insulated by the casing 6 and does not reverberate to the outside of the device.
If casing 17 is installed as far below the inner pipe 13 as possible, the lower part of the casing will be mostly buried in the ground during the work of the sand pile making equipment, so the sound insulation effect will be even better. By appropriately providing a sound insulating member between the pipe 13 and the middle pipe 9, a further sound insulating effect can be achieved.

The sand pile construction apparatus shown in FIGS. 1 to 3 described above rotates the rectangular cylindrical casing 6 using a rotary drive means, and also prevents the inner pipe 13 from colliding with each other when the inner pipe 13 moves upward or downward. The casing 6 is driven in or pulled out by the downward or upward impact force of the stopper part of the middle pipe 9 and the rotational action described above, as shown in FIGS. 4 and 5. The sand pile building device shown in FIG. 1 is the same as the device shown in FIGS. 1 to 3 in that the rectangular cylindrical casing 6 is rotated by a rotary drive means, but instead of applying an impact force to the casing 6, vertical vibration is applied. This shows a device in which a driving force in the vertical direction, that is, a pushing force or a pushing force is applied to the casing 6 by means to move the casing downward or upward by a required amount. In addition, these figures 3 and 4
The main parts of the structure of the device shown in the figure are shown in Figures 1 to 3.
Since the device is the same as the one shown in the figure, a detailed description of the parts other than the vertical drive means and related parts will be omitted.
Moreover, the same reference numerals are given to the same members.

In FIGS. 3 and 4, numeral 34 denotes a vertical drive means for applying a driving force in the vertical direction to the square cylindrical casing 6 in order to move it upward or downward by the required amount, and this vertical drive means Means 34
is provided on a support frame 8 together with rotation drive means 7 for rotating the casing 6. The vertical drive means 34 includes a chuck mechanism 35 that clamps and fixes the rectangular cylindrical casing 6, a lifting mechanism 36 that lifts and lowers the chuck mechanism 35 by a required stroke, and a coupling mechanism that rotatably connects the chuck mechanism 35 to the lifting mechanism 36. It consists of 37. To explain each mechanism in detail, the chuck mechanism 35 has air cylinders (hydraulic cylinders may also be used) 39 disposed on the ring-shaped frame 38, for example, every 90 degrees, and each piston rod 39a is moved in the radial direction of the frame 38. The crimp piece 4 at the tip of each piston rod 39a is caused to reciprocate when the frame body 38 of each piston rod 39a is operated in the centripetal direction.
The rectangular cylindrical casing 6 is clamped and fixed through the 0. The elevating mechanism 36 also includes a plurality of air cylinders (or hydraulic cylinders) 41, 4 installed vertically on the support frame 8, for example, two air cylinders (or hydraulic cylinders) 41, 4.
1, these air cylinders 41, 41
A connecting mechanism 37 is interposed between the chuck mechanism 35 and the chuck mechanism 35. That is, this coupling mechanism 37 has a ring-shaped frame 42 having a larger diameter than the ring-shaped frame 38 of the chuck mechanism 35, and a head cover 43 is fitted between the frame 42 and the frame 38. The tips of the piston rods 41a, 41a of the air cylinders 41, 41 are connected to the lower surface side of the ring-shaped frame 42. Therefore, when operating the vertical drive means 34, the chuck mechanism 35 clamps and fixes the rectangular cylindrical casing 6, and in this state the cylinder 4 of the lifting mechanism 36
1, 41 to operate the piston rods 41a, 4.
By raising 1a by a predetermined stroke, the casing 6 is lifted by that stroke,
Further, by lowering the piston rods 41a, 41a, they are pushed down by the same stroke. At this time, when the casing 6 rotates, the chuck mechanism 35 rotates integrally with the casing 6 and moves itself upward or downward.

In the operation of the sand pile making equipment as mentioned above,
A machine frame (not shown) is suspended from the top of the league 2 and guided and supported along the guide rail 3, and the rotational drive means 7 is operated to rotate the rectangular cylindrical casing 6.
At the same time, the casing 6 with the vertical drive means 34 activated is forcibly pushed downward by a predetermined stroke of the air cylinder 41. From this state, the lifting operation wire (not shown) is let out to lower the machine frame, and the casing 6 is pushed down to the ground by the rotation action of the rotation drive means 7 and the so-called intermittent pushing action of the vertical drive means 34. It penetrates to a predetermined depth inside. After penetrating the casing 6 to a predetermined depth in this way,
While feeding sand from the hopper into the sand insertion passage 10 between the casing 6 and the middle pipe 9, the machine frame is gradually raised by winding the lifting operation wire and the casing 6 is pulled out. During this pulling operation, the rotational action by the rotational drive means 7 is performed in the same manner as during penetration, but the vertical drive means 34
For this purpose, an upward movement, that is, a pushing up action, is performed in the opposite direction to that during penetration. In this pushing up action, the piston rod 41a of the cylinder 41 of the elevating mechanism 36 is raised by a predetermined stroke while the casing 6 is clamped by the chuck mechanism 35, thereby pushing up the casing 6 by that stroke. After opening and releasing the piston rod 41a and lowering the piston rod 41a, the above operation is performed again, and thereafter the casing 6 is moved upward by the above stroke amount by the same operation. Furthermore, the sand introduced into the sand insertion passage 10 is supplied into the lower end of the casing 6, where it is compacted by the head 44 of the inner pipe 13, forming a dense and strong sand pile as the casing 6 rises. .

As explained above, the sand pile construction device of the present invention has the following features:
The casing is continuously rotated by a rotary drive means without using an exciter as in the conventional method, while an abutting part is provided on the middle pipe and this abutting part is brought into contact with a stopper part provided on the middle pipe. The impact force caused by this impact is transmitted to the casing that is integrally connected to the inner pipe, and the casing is driven in and pulled out by the impact force and the rotational action of the rotation drive means. Therefore, the impact noise caused by the impact between the impact part and the stopper part can be insulated by the casing, and since the casing is buried in the ground, it does not cause severe noise during use of the device. In addition, due to the continuous rotation of the casing, the impact applied to the casing, and the tamping effect caused by the vertical movement of the inner tube during extraction, the casing can be penetrated into the ground or pulled out of the ground quickly and effectively. It is possible to create strong sand piles.

Furthermore, the sand pile construction device of the present invention uses a vertical drive means that applies vertical driving force to the casing to move the casing upward (pushing up) or downward (pushing) by a predetermined amount, and also rotates the casing. A rotational drive means is used, and a vertical vibration means such as an air cylinder is used to move the inner tube up and down by a predetermined stroke when it is pulled out.
The device does not generate severe noise or vibration during use, and the three methods described above allow for the pushing up, pushing and rotation of the casing, as well as the up and down movement of the middle pipe, to quickly build strong sand piles. can be created.

Further, according to the device of the present invention, the rotational drive means and the vertical drive means are not provided on the machine frame but are placed on the leader side, particularly in the middle or lower part of the leader, so that the structural members suspended by the leader The weight of the device can be reduced, making it easier to support the device by the leader, and the center of gravity of the entire device can be lowered, allowing work to be carried out in a stable state.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional elevation view showing an embodiment of the sand pile building device according to the present invention, FIG. 2 is a side view of the main part of the device shown in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line - 4 is a partially sectional elevational view showing a sand pile building device having a partially different configuration from the device shown in FIG. 1, and FIG. 5 is a sectional view taken along the line -- in FIG. 4. DESCRIPTION OF SYMBOLS 1... Machine frame, 2... Leader, 5... Hopper, 6... Casing, 7... Rotation drive means, 8... Support frame, 9... Middle tube, 10... Sand insertion passage, 11, 12... Connection plate, 13... Inner tube , 14... Air spring device (vertical vibration means), 15... Stopper part, 16, 17
...Abutting portion, 34...Vertical drive means.

Claims (1)

[Scope of Claims] 1. A sand charging hopper is integrally equipped at the bottom of the machine frame suspended by the leader, and a casing is rotatably suspended from the lower end of the hopper, allowing the casing to be moved up and down. At the same time, a rotational drive means for transmitting rotational force to the casing is provided in the middle or lower part of the leader, a middle pipe is inserted into the casing, and the middle pipe and the casing are integrally connected via a connecting plate. At the same time, a sand insertion passage is formed between these middle tubes and the casing, and a vertical vibration means that vibrates vertically for a predetermined stroke is provided in the machine frame, and the inner tube inserted into the middle tube is linked to this vertical vibration means. A sand pile making device characterized in that the inner pipe is provided with an abutment portion that abuts against a stopper portion provided on the middle pipe when the inner pipe moves up or down. 2. A sand charging hopper is integrally equipped at the bottom of the machine frame suspended by the leader, and a casing is rotatably connected to the lower end of the hopper, allowing the casing to move up and down while applying rotational force to the casing. A rotational drive means for transmitting the information is provided in the middle or lower part of the leader, and a middle pipe is inserted into the casing, and the middle pipe and the casing are integrally connected via a connecting plate. A sand insertion passage is formed between the machine frame and the casing, and a vertical vibration means that vibrates vertically for a predetermined stroke is provided in the machine frame, and an inner tube inserted through the middle tube is interlocked with the vertical vibration means, and the leader is connected to the inner tube. A sand pile construction device, which is provided with a vertical driving means in an intermediate portion or a lower portion thereof for applying a driving force in the vertical direction to the casing in order to move the casing upward or downward by a required amount.