JPS6327486B2 - - 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 the soft ground.

Various devices for creating sand piles have been provided in the past, but a typical example is a so-called vibro-type device that uses an exciter. In addition to applying vibration to the inner tube, the inner tube is vibrated up and down using a vertical vibration means such as a fluid pressure cylinder with an amplitude much larger than the vibration caused by the vibrator, and the sand in the outer tube is tamped and sand piles are created. It is designed to form a . However, since this type of device uses a vibrator and the vibrator is exposed to the outside, it generates extremely strong vibrations and noise during use, and also causes small-amplitude vibrations to the inner and outer tubes. Since two vibrating means are used: a vibrating machine that vibrates the inner tube vertically with a large amplitude, and a vibrating device that vibrates the inner tube vertically with a large amplitude, the entire device becomes larger and more complicated, leading to a rise in cost. In addition, as another sand pile creation device, an inner pipe is vibrated up and down by a vertical drive means, and a spiral digging blade is provided on the outer peripheral side of an outer pipe, and this outer pipe is rotated by a rotation drive means. However, if the outer tube is structured to rotate continuously like this, jet air is generally blown out from the tip or middle part of the outer tube to alleviate the frictional resistance between the outer circumferential side of the outer tube and the surrounding ground. It becomes difficult to connect the jet air supply pipe used for this purpose. In other words, pressurized air from a compressor installed on the ground is normally supplied to the jet air supply pipe connected to the outer pipe via a connecting pipe, but as mentioned above, if the outer pipe is If the product rotates continuously, it is impossible to connect piping to the outer pipe using the normal method, and even if special piping is used, the jet air supply pipe cannot be freely connected to the rotating outer pipe. Ta.

Furthermore, in the case of the former vibro-type device, both the vertical vibration means and the exciter, and in the case of the latter device, both the vertical vibration means and the rotary drive means,
Both are located above the respective devices,
Therefore, these vibrating means and exciter, or the vibrating means and rotary drive means are quite heavy objects, so if these heavy objects are placed at the top of the tall leader at the beginning of the work, the center of gravity of the device will be There was a problem in that the machine was set at a high position, forcing work to be carried out in an unstable condition.

The present invention aims to provide a novel sand pile construction device that can solve the problems of the conventional devices as described above, and one embodiment thereof will be described below based on the drawings.

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 leader 2 via a wire (not shown). This is a machine frame supported by a guide rail 3 of a leader 2 via a guide 4 so as to be able to rise and fall freely, and a sand charging hopper 5 is integrally installed in the lower part of this machine frame 1. Reference numeral 6 denotes a rectangular cylindrical casing, which is rotatably connected to the lower end of the hopper 5. Reference numeral 7 denotes a reversing drive means that transmits a reversing force to the casing 6 while allowing the casing 6 to move up and down. 2 is mounted on a support frame 8 fixed to the lower part of 2. A cylindrical middle tube 9 is inserted concentrically into the casing 6 to form a sand insertion passage 10 between it and the casing 6, and the upper end of the middle tube 9 passes through the inside of the hopper 5. It extends through the lower end of the machine frame 1 and is rotatably supported there. The middle pipe 9 is integrally connected to the casing 6 by a plurality of (for example, four) connecting plates 11..., 12... arranged at intervals in the circumferential direction at the upper end and the middle part. Therefore, the casing 6 and the middle pipe 9
It can be rotated as one unit. 13 is a cylindrical inner tube inserted into the inner tube 9 (it may be hollow or solid)
The upper end of this inner pipe 13 extends further upward beyond the upper end of the middle pipe 9, and the lower end extends further downward beyond the lower end of the middle pipe 9, and this inner pipe 13 is inserted into the machine frame 1. Air spring device 14 as a vertical vibration means that is equipped and vibrates vertically between predetermined strokes.
Therefore, the inner tube 13 is configured to vertically vibrate with the same stroke, that is, the same amplitude as the air spring device 14. 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. The casing 6 is integrally provided at predetermined intervals.
When the casing 6 is driven in, only the upper abutment part 16 abuts against the stopper part 15, and when the casing 6 is pulled out, only the lower abutment part 17 abuts against the stopper part 15.
Therefore, the stopper part 1 of the upper abutment part 16 like this
The downward impact force generated by the impact on the inner pipe 9 is transmitted to the casing 6 via the connecting plates 11 and 12, and the downward impact force acting on the casing 6 causes the casing 6 to sink into the ground. As the lower abutting portion 17 hits the stopper portion 15, an upward impact force is generated on the middle tube 9, and this upward impact force is applied to the connecting plates 11, 1.
2 to the casing 6
This will promote the pulling action of. 18 is a plurality of connecting plates 19 at the lower end of the casing 6.
It is a rectangular cylindrical casing head with openings at both ends, which is concentrically and integrally connected to the casing 6 through the casing 6, and has a larger diameter than the casing 6 (see FIG. 4).

As is clear from FIGS. 1 and 3, the reversing drive means 7 includes four guide rollers 21 inside a hollow cylindrical rotating body 20 through which the square cylindrical casing 6 can be inserted. Each guide roller 21 is rotatably mounted on a pin 22 by a pin 22, and a sprocket is attached to the outer circumferential surface of the rotating body 20. 23 and 24 are arranged in two stages, upper and lower, and the cylindrical rotating body 20 is mounted on a hollow cylindrical base 25 fixed on a support frame 8 extending from the leader 2 side, and a bearing is mounted on the hollow cylindrical base 25. The sprocket 2 is rotatably supported via the sprocket 26.
3 and 24 are connected to chains 27 and 2 as shown in FIG.
The piston rods of a pair of air cylinders (hydraulic cylinders may also be used) 29A and 29B are arranged such that both ends of the upper chain 27 are placed on one side of the support frame 8. 29a, 29b, and the piston rods 30a, 30b of the same one-to-one pair of air cylinders (or hydraulic cylinders) 30A, 30B, in which both ends of the lower chain 28 are arranged on the other side of the same frame 8. It is made by connecting. Note that the air cylinders 29A, 29B and 30A, 30B are fixed on mounting bases 31, 32 fixed to the support frame 8. In operating this reversing drive means, pressurized air is alternately supplied and discharged to the air cylinders 29A, 29B of one set, and in synchronization with this, the pressure is supplied to and discharged from the air cylinders 30A, 30B of the other set. Air is supplied and discharged from the air cylinders 29A and 2 of the above one set.
By alternately performing the supply and discharge in a reverse relationship with 9B, the upper and lower sprockets 2
3, 24 and the chain 27 hooked thereon,
The cylindrical rotating body 20 can be rotated, for example, by 90 degrees via the rotating body 28, and the rectangular cylindrical casing 6 is rotated via the guide rollers 22 by the reversing operation of the rotating body 20. I have to. In this case, the casing 6 is free to move up and down by itself regardless of its reversal movement. Furthermore, since the casing 6 is integrally formed with the middle tube 9, when the casing 6 is reversed, the middle tube 9 is simultaneously reversed and can move up and down.

In addition, the machine frame 1 has four pillars 34 erected at the four corners of the lower frame 33, and these pillars 3
4... is formed by fixing the upper frame 35 to the upper end,
An air spring device 14 is installed between the upper and lower frames 33 and 35 of the machine frame 1, and the upper end of the middle tube 9 is rotatably held in the center of the lower frame 35 via a bearing device 36. In the air spring device 14, a movable base 37 is attached to the supports 34 so as to be vertically slidable, and a downward movement air spring 38 is fitted onto each support post 34 between the movable base 37 and the upper frame 35. At the same time, four air springs 39 for upward movement are similarly interposed between the movable table 37 and the lower frame 33, and the air springs 38 for downward movement are supplied with air from an air distribution pipe (not shown). Connect a branch pipe (not shown),
Similarly, a branch pipe from the air distribution pipe is connected to the upward air spring 39, and an air compressor (not shown) is connected to the air supply port and exhaust port (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 pressurized into the lower movement spring 38 and the upper movement air spring 39. The air spring 38 for lower movement and the air spring 3 for upper movement are
9 alternately expands and contracts, whereby the movable base 3
7 is configured to vibrate vertically between a lower mount 33 and an upper mount 35 at a predetermined stroke. The upper end of the inner tube 9 is fixed to the movable table 37 of the machine frame 1, and the vertical vibration of the movable table 37 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 37. It will vibrate.

The moving path of the movable base 37 that moves up and down in the air spring device 14, for example, the air springs 38, 39
For example, 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 are installed on the side of the casing 6. The movable base 37 is installed at an appropriate point before the end of its stroke in its upward stroke, and a limit switch for withdrawal is installed at an appropriate point before the end of its stroke in its downward stroke of the movable table 37. It is electrically connected to the solenoid valve provided in the flow pipe. When driving the casing, when the movable table 37 descends to the end of its downward stroke, the upper abutting portion 1 is lowered due to the lowering of the inner tube 13.
6 collides with the stopper portion 15 of the inner pipe 9, but when the movable base 37 is raised, the movable base 37 kicks the limit switch before reaching the end of the stroke of its upward stroke, and the upward movement is stopped. 1
The lower abutment part 17 of the inner tube 13 does not abut against the stopper part 15, and the same operation is repeated thereafter, so that only the upper abutment part 16 abuts against the stopper part 15 of the inner tube 13 during driving of the casing. It becomes true. Furthermore, when the casing is being pulled out, when the movable base 37 is lowered, its lowering is limited by a limit switch before reaching the end of its stroke, so that only the lower abutment part 17 abuts against the stopper part 15 of the inner tube 13. ing.

When operating the sand pile making device having the above-described configuration, first, the machine frame 1 is raised to an appropriate height above the top of the leader (not shown) and supported by the guide rail 3 via the guide 4. Then, the reversing drive means 7 is activated to continuously reverse the casing 6 by, for example, 90 degrees, and the air spring device 14 is activated to vibrate the inner tube 13 up and down. From this state, the lifting operation wire (not shown) is let out to lower the machine frame 1, and the intermediate 9 is moved by the continuous reversal movement of the casing 6 and the impact of the upper abutment part 16 against the stopper part 15. Due to the downward impact force acting on the casing 6 through the
The casing 6 is penetrated into the ground. After the casing 6 has penetrated into the ground to a predetermined depth, the sand is introduced into the sand insertion passage 10 between the casing 6 and the middle pipe 9 from the hopper 5, and the lifting operation wire is wound up to form the machine frame. is gradually raised to begin the operation of pulling out the casing 6. During this pulling operation, the casing 6 is reversed and the inner tube 13 is vibrated vertically in the same manner as when driving, but only the lower abutting part 17 is brought into contact with the stopper part 15, contrary to the driving. Then, the casing 6 is pulled out of the ground by the continuous reversing operation of the casing 6 and the upward impact force acting on the casing 6 due to the impact of the lower abutting portion 17. In this case, the sand introduced into the sand insertion passage 10 is supplied into the casing head 18 provided at the tip of the casing 6, where it is compacted by the head 40 of the inner pipe 13 and as the casing 6 rises. Forms dense and strong sand piles. In addition, the impact sound when the upper abutment part 16 or the lower abutment part 17 abuts against the stopper part 15 in the above-mentioned driving operation and extraction operation is generated within the casing 6, so the casing 6 insulates the sound. There is no large reverberation outside the impact portions 16, 17.
If the lower part of the casing 6 is installed as far as possible in the lower part of the inner pipe 13, the lower part of the casing 6 will be almost buried in the ground during the sand pile construction work, so the sound insulation effect will be even better. 13 and middle tube 9
By appropriately providing a sound insulating member between the two, a further sound insulating effect can be achieved.

Although not shown, a plurality of jet air supply pipes extending from the machine frame 1 side through the hopper 5 are installed on the outer surface of the casing 6 in the axial direction of the casing 6. The pipes have their respective ends opened at the middle and lower ends of the casing 6 (including the casing head 18), and some pipes open from the lower end of the casing 6 toward the inside of the casing 6, and the upper ends of these pipes, i.e. The portion from the hopper 5 to the casing 6 is made of a flexible pipe and extends with a slight bend so as not to interfere with the reversing operation of the casing 6. Therefore, pressurized air is supplied from an air compressor (not shown) to these jet air supply pipes, and the jet air is injected into the outer peripheral surface of the casing 6 or into the tip of the casing 6 from the respective tip opening nozzles, thereby causing the casing 6 and its Frictional resistance with the surrounding ground is alleviated,
Furthermore, the sand thrown into the casing 6 is effectively pushed out from the tip of the casing head 18.

In the embodiments described above, the inner tube 13 is illustrated as having a hollow shape, but the inner tube 13 may be a solid so-called rod-shaped body.

As explained above, according to the sand pile building device of the present invention, instead of using a so-called vibrator that gives small amplitude vibrations to the outer pipe (casing) or the inner pipe as in the past, A part is provided, and this abutting part abuts against a stopper part provided on the middle pipe, and the impact force from this impact is transmitted to the casing which is integrally connected to the middle pipe, and the casing is driven in and pulled out by the impact force. Since the impact sound caused by the impact between the impact part and the stopper part can be insulated by the casing, the casing is buried in the ground, which causes intense noise while the equipment is in use. Never. In addition, instead of using two vibrating devices such as a conventional vibrator and an inner tube vertical vibration means, only one vibrating device for vertically vibrating the inner tube is used, and in addition, a reversing drive for reversing the casing is used. Since the device is installed in the middle or lower part of the leader side, the device can be made smaller and its structure can be simplified, and the center of gravity of the device can be set at a low position, allowing work to be performed in a stable state. Can be done.

Furthermore, the device of the present invention does not rotate the casing continuously in one direction as in the past, but instead rotates the casing continuously. In particular, in the connection part of the pipe between the sand charging hopper on the fixed side and the casing on the rotating side, the connection can be easily made by leaving a slight margin of length to the extent that it does not interfere with the reversal of the casing. Partial piping can be easily done, and therefore the casing has the great effect of being able to freely install any number of jet air supply pipes required.

[Brief explanation of drawings]

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 line taken along the line shown in FIG. cross section,
FIG. 4 is a sectional view taken along the line -- in FIG. 1. DESCRIPTION OF SYMBOLS 1...Machine frame, 2...Leader, 5...Sand charging hopper, 6...Casing, 7...Reversing drive means, 9...Middle pipe, 10...Sand insertion passage, 13...Inner pipe, 14...Air spring device (vertical vibration means), 15... stopper part,
16...Upper impact section, 17...Lower impact section.

Claims (1)

[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 connected to the lower end of the hopper, allowing the casing to move up and down while applying a reversing force to the casing. A reversing drive means for transmitting the power 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 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 pipe inserted into the middle pipe is interlocked and connected to this vertical vibration means. A sand pile making device comprising a pipe provided with an abutment part that abuts against a stopper part provided on the middle pipe when the inner pipe moves up or down.