JPS6214190Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a pile press-in driving machine, and in particular, it is equipped with a pushing device in addition to an auger drive device, and the pushing device chucks the pile. The present invention relates to a pile press-in driving machine that can easily press-in or pull out a pile without being affected by the type and length of the pile or the condition of the ground.

[Prior Art] Conventionally, in order to press-fit and bury piles, two methods have been used: a pile press-in driving machine that chucks the head of the pile and pulls it downward with a wire, and a press-fit device that has a hydraulic cylinder. There is a method in which the lower edge of the pile is chucked and the pile is pushed in by reciprocating motion of a hydraulic cylinder.

[Problem that the invention attempts to solve]

In the conventional technology, the former method works well on soft ground, but
In hard ground, if the piles are long or have a small section modulus and are prone to bending, the piles will bend in a dogleg shape, making it difficult to drive the piles as required and having to pull them up and repress them. It was a waste of time.

In addition, according to the latter method, the pile can be press-fitted without buckling in any place where the ground is soft or hard, but because it relies on the reciprocating motion of the hydraulic cylinder, the speed of each press-in is always the same as in soft ground. The disadvantage was that it took too long to press fit even in easy-to-fit locations.

[Means for solving problems]

The present invention solves the disadvantages of the conventional device,
It was developed with the aim of providing a pile press-in driving machine that can drive piles in both soft and hard ground at a speed appropriate to the hardness of the ground without causing buckling of the pile material. As a specific means, a leader 3 having a lower frame 4 at the lower end is suspended from an upper sheave case 2 suspended from the upper end of a boom 1 mounted on a self-propelled vehicle, and one side of the leader 3 is An auger drive device 5 is disposed so as to be slidable up and down along the leader 3, and a pushing device 7 is disposed below the auger drive device 5 so as to be slidable up and down along the leader 3. 8 is connected to a pushing device 7 via the lower frame 4, and the pushing device 7 forms a pile through hole 14 that passes vertically through the outside of the auger tube 11, and also connects the pushing device 7 to a pushing device 7 in the vicinity of the pile through hole 14. The camchuck 16 and the extraction camchuck 17 are connected by a link so that they both rotate in opposite directions by the operation of the cylinder 18, and one of the teeth 16C and 17C of each camchuck engages with the pile P in the pile through hole 14. At the same time, the other constitutes a pile press-in driving machine characterized in that the tooth portions are arranged in a shifted direction so as to release the engagement.

[Effect]

Since the pushing device is chucking the pile, when the pulling wire is pulled, the pushing device descends while chucking the pile and can press the pile into the ground.

In this case, in hard ground or sandy ground, the auger is driven by an auger drive device to excavate while the pile is press-fitted by a pushing device. When the ground is soft, piles can be pressed in using only a pushing device. The teeth of the push-in camchuck and the teeth of the pull-out camchuck provided on the push-in device are slightly misaligned in rotational direction, so when the teeth of the push-in camchuck are chucking the pile, the teeth of the pull-out camchuck are not aligned with the pile. Don't check. Further, when the teeth of the pull-out camchuck chuck the pile, the teeth of the push-in camchuck release the chuck of the pile.

〔Example〕

Embodiments of the present invention will be described based on the drawings. An upper sheave case 2 is swingably suspended from the upper end of a boom 1 mounted on a self-propelled vehicle (not shown) so as to be able to swing and be depressed.

A leader 3 is installed in the center of the upper sheave case 2.
A lower frame 4 is fixed to the lower end of the leader 3, the longitudinal direction of the lower frame 4 is oriented in the same direction as the upper sheave case 2, and sheaves 4A, 4B is attached to the shaft.

Further, sheaves 2A and 2B are pivotally attached to both longitudinal ends of the upper sheave case 2, and a sheave block 6 is suspended from which the auger drive device 5 is pulled in using wires 2C and 2C. The retracting sheave block 6 is constructed such that guide portions 5A, 6A are formed on one side thereof, and the guide portions 5A, 6A are loosely fitted into the guides 3A, 3A, . . . of the leader 3 so as to be vertically slidable.

As shown in FIG. 3, the leader 3 has a rectangular planar shape and has guides 3A, 3A, . . . protruding from its four corners. A pull-in wire 8 is disposed on one side of the leader 3 below the auger drive device 5 so as to be vertically slidable along the guide 3A of the pushing device 7, and has one end fixed to the bottom of the pushing device 7. 4, and connected to the retractable sheave block 6.

The pushing device 7 has guide portions 10, 10 formed on one side of the cylindrical outer frame body 9, and allows the guide portions 10, 10 to be guided by the guides 3A, 3A of the leader 3, so that it can slide vertically. The auger tube 11 is fitted in the center of the plane of the outer frame 9 with its auger insertion hole 11A facing vertically, and bearings 9A, 9A are arranged in an annular manner on the upper part of the outer frame 9. A rotating plate 12 formed on the upper outer peripheral edge of the auger tube 11 is placed on bearings 9A, 9A, so that the auger tube 11 can be rotated with respect to the outer frame 9. Reference numeral 13A in the figure is an upper flange fixed to the auger cylinder 11, and is fixed to the rotary plate 12 with bolts 12A. Further, 13B is a lower flange.

In the plane of the rotary plate 12, as shown in FIG. 3, a pile through hole 14 matching the cross-sectional shape of the pile P is formed close to the outer peripheral surface of the auger tube 11 on the opposite side from the guide part 10. Pile through holes 14 are similarly formed in the upper flange 13A and the lower flange 13B, so that the pile P can be vertically penetrated in contact with the auger tube 11.

A side plate 15 is arranged between the pile through hole 14 and the outer frame 9 at a symmetrical position on both widthwise ends of the pile through hole 14, and the lower part of the side plate 15 is located below the lower flange 13B. It's made to stick out.

Therefore, between the two opposing side plates 15, the shafts 16A, 1
7A are horizontally mounted vertically, and a push-in camchuck 16 and a pull-out camchuck 17 are pivoted on the upper and lower sides of each.

Further, a cylinder 18 is vertically disposed above the side plate 15, and the lower end of a downwardly facing piston rod 18A is connected with a pin to an arm 16B of the push-in camchuck 16.
facing the pile P penetrated through the pile through hole 14,
And the piston rod 18A is activated by the operation of the cylinder 18.
When the arm 16B is extended and the tip of the arm 16B is tilted downward, the stake P is chucked, and when the tip of the arm 16B is tilted upward, the chuck to the stake P is released.

Further, the pull-out camchuck 17 connects a link 17D to the tip of the arm 17B, and pushes the upper end of the link 17D into the lower arm 16D of the camchuck 16.
The teeth 17C of the pull-out cam chuck 17 do not come into contact with the pile when the teeth 16C of the push-in cam chuck 16 chuck the pile, and the teeth 16C of the push-in cam chuck 16 chuck the pile P. It is arranged so that the direction is shifted so as to chuck the pile P when it is released, and it rotates in the opposite direction.

Therefore, the auger insertion hole 11 of the pushing device 7
The auger 20 is inserted through A, and the upper end of the auger 20 is connected to the output shaft 5B of the auger drive device 5.

The operation and usage of the above configuration will be explained as follows.

In FIG. 1, the pile P is lifted by a lifting hook 19 provided on the leader 3, and the lower end of the pile P is inserted into the pile through hole 14 of the pushing device 7 from above. At this time, if the cylinder 18 retracts the piston rod 18A upward and pulls the arm 16A upward as shown in FIG. 4, the push-in camchuck 16 will rotate in the opposite direction of the arrow, allowing the pile P to be easily inserted. . Then, as shown by the chain line in FIG. 1, the pushing device 7 is lifted up to a predetermined height of the pile P using the lifting hook 19, and the piston rod 18A of the cylinder 18 is extended downward as shown in FIG. , the push-in camchuck 16 is in the direction of the arrow (clockwise)
The tooth portion 16C can be pressed against the stake P and chucked. As a result, the retraction sheave block 6 has been lowered to the position shown by the chain line in FIG.

Next, in FIG. 1, when the auger drive device 5 is lowered while being driven, the auger 20 begins to excavate the ground G while rotating. Like this, Auger 2
When the retraction sheave block 6 is hoisted up from the position indicated by the solid line to the position indicated by the upper dashed line as shown in FIG. The pile P that is chucked by the pushing device 7 is pressed into the ground. When the pile P is press-fitted until the pushing device 7 touches the ground, the cylinder 18 is operated to loosen the pushing camchuck 16, and the pushing device 7 is pressed into place.
is lifted upward again using the hook 19, the upper part of the pile P is chucked again, and the press-fitting is repeated. This does not apply when the top end of the pile P is checked from the beginning.

At the time of press-fitting, the teeth 16C of the push-in camchuck 16 are configured to strongly engage the pile P when turned clockwise as shown in Fig. 4, and the piston rod 18A is extended, so that when the pile is press-fitted, The more the chuck force increases, the more the chuck force increases.
On the other hand, the pull-out cam chuck 17 has no chuck function against the pile P at this point.

When the pile P is to be pulled out, the cylinder 18 is moved to the position shown by the two-dot chain line in FIG. It rotates to open the chuck with the pile P, but
Due to the interlocking action of the link 17D, the lower extraction camchuck 17 rotates counterclockwise to chuck the pile P. If the pushing device 7 is lifted upward by the hook 19, the pile P can be pulled out while being strongly chucked.

Therefore, if the pile P has been pressed in halfway but it is difficult to press it in any further, or if you want to repeat press-in, pull-out, press-in, pull-out, as described above, extend the piston rod 18A of the cylinder 18 when pushing. It is operated by contracting when pulling out.

In the case of hard or clay ground, the piles are press-fitted at the same time as the auger excavation, but if the top of the pile is chucked, the pile itself may buckle.
It is better to check the middle position of the pile and press fit. Hard ground with gravel (including gravel, etc.)
In this case, after the preliminary excavation, the piles are press-fitted at the same time, and the risk of buckling can be eliminated by chucking the lower part of the piles.

The above is a case of hard ground, but in soft ground, the pile is pushed by the pushing device 7 without using the auger 20.
Check the top of the lead-in wire 8.
The pushing device 7 is lowered by pulling the pile P.
can be press-fitted into the ground. In addition, in sandy ground, in order to cope with compaction due to sand, it is preferable to excavate using an auger 20 and then chuck and press the top of the pile into the pushing device 7.

Therefore, it is only necessary to check the most effective position according to the type and length of the pile, the hardness and softness of the ground, etc.
Not only does this improve work efficiency, but the pile can also be set by simply inserting the bottom end of the pile from above the pushing device, making operation easy and reducing labor.Also, the pushing device and auger drive device can be installed independently. The first effect is that piles can be press-fitted in soft ground without using an auger drive device, and the second effect is that the auger that excavates in advance can
Because it is possible to stop the pile before the press-in is completed, it is possible to press-in the pile deeper, and as a result, it is possible to increase the support capacity of the pile.Furthermore, because the pushing device is retracted by a pull-in wire, it is possible to press-in the pile deeper Compared to the reciprocating motion of a cylinder, one stroke during press-fitting can be taken longer, which greatly improves efficiency, especially in soft ground.Furthermore, the lead-in wire can be hoisted up with a winch, so it is faster than a hydraulic cylinder method. Can be press-fitted.

Furthermore, the push-in cam chuck 16 that gets stuck when press-fitting the pile
In addition, it is equipped with a pull-out cam chuck 17 that engages when pulling out the pile, and each cam chuck 16, 1
7. Its operation is controlled by an electric magnet operated cylinder,
Alternatively, when using a hydraulic or pneumatic cylinder, a small force sufficient to rotate the weight of the double cam is sufficient.

As explained in detail above, the pile press-in driving machine according to the present invention has a pushing device and an auger drive device separated from each other and disposed in the leader 3, and a pile through hole is provided in the pushing device. We provide a pile press-in driving machine that uses a cylinder and a link to connect a push-in camchuck that engages and a pull-out camchuck that engages when pulling out a pile so that the camchuck on either side engages with the pile, and can be used on any soil type. It enables press-fitting and pulling out of piles that meet the conditions, and realizes a device with great practical effects.

[Effects] The present invention has the following excellent effects.

(1) In addition to the auger drive device, it is equipped with a separate pile pushing device, so piles can be quickly pressed into soft ground with just the pushing device without using an auger, resulting in excellent workability. There is.

(2) Even in hard ground, it is possible to advance the excavation with an auger and press-in piles easily and quickly with a pushing device, and also to stop excavation with an auger midway and remove the area below where the auger is not excavating. It is possible to press-fit the pile deeper into the pile with a pushing device, and as a result, the embedded support capacity of the pile can be increased.

(3) When the pushing device is operated by a cylinder, the cylinder length is the limit for one stroke, but in the present invention, since it is pulled in by a wire, it can be pressed in all at once, which improves efficiency especially in soft ground.

(4) The push cam chuck and the pull cam chuck can be operated by one cylinder, and since the cam teeth are oriented in opposite directions, powerful chuck can be achieved with a small force.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a side view of the main part, Fig. 2 is a side view showing the pile press-in, Fig. 3 is a plan view of the pushing device, and Fig. 4 is a cross section of the pushing device. The side view shown in FIG. 5 is a front view of the camchuck portion. 1...Boom, 2...Upper sheave case, 2
A, 2B...Sheave, 2C...Wire, 3...Leader, 3A...Guide, 4...Lower frame, 4
A, 4B... Sheave, 5... Auger drive device, 5
A... Guide portion, 5B... Output shaft, 6... Retraction sheave block, 7... Pushing device, 8... Retraction wire, 9... Outer frame body, 9A... Bearing, 10...
... Guide part, 11 ... Auger tube, 11A ... Auger insertion hole, 12 ... Rotating plate, 13A ... Upper flange, 13B ... Lower flange, 14 ... Pile penetration hole, 15 ... Side plate, 16 ... Push-in camchuck,
16A...shaft, 16B...arm, 16C...teeth, 16D...lower frame, 17...pull-out camchuck, 17A...shaft, 17B...arm, 1
7C...teeth, 17D...link, 18...cylinder, 18A...piston rod, 19...hanging hook, P...pile, 20...auger.

Claims (1)

[Scope of utility model registration request] A leader 3 having a lower frame 4 at the lower end is suspended from an upper sheave case suspended from the upper end of a boom 1 mounted on a self-propelled vehicle so as to be able to turn and lower.
An auger drive device 5 is disposed on one side of the leader 3 so as to be slidable up and down along the leader 3, and a pushing device 7 is disposed below it so as to be slidable up and down along the leader 3. A pull-in wire 8 pulled by the upper sheave case 2 is connected to a pushing device 7 via the lower frame 4, and the pushing device 7 forms a pile through hole 14 passing vertically through the outside of the auger tube 11, and Close to the pile through hole 14, a push-in camchuck 16 and a pull-out camchuck 17 are connected by a link so that they both rotate in opposite directions by the operation of a cylinder 18;
In addition, the tooth portions 16C and 17C of each camchuck are arranged in such a way that when one tooth portion engages with the pile P in the pile through hole 14, the other tooth portion releases the engagement. Pile press-in driving machine.