JP2023007692A - Turning device, and pile driver - Google Patents

Abstract

To provide a pile driver capable of driving a pile more easily.SOLUTION: A turning device 7 comprises: a support part 71 mounted to a leader 3 provided in a pile driver 1 so as to freely ascend/descend; and a turning part 72 connected to an upper part of a vibration hammer 6. The turning part 72 is connected to the support part 71 so as to freely turn. The support part 71 comprises a motor, and the turning part 72 turns with respect to the support part 71 by driving force from the motor.SELECTED DRAWING: Figure 1

Description

The present invention relates to a turning device and a pile driver.

BACKGROUND ART When constructing a building such as a house, a pile driving work is sometimes performed to drive piles into the ground. There are various construction methods for piling work, but the procedure for piling construction by the pre-boring method is as follows.

First, an earth auger rotates the auger screw to make a hole in the ground and insert a pile (for example, an H steel pile) into the hole. At this time, if the direction of the pile is misaligned, the worker rotates the pile using a crowbar to adjust the direction. Next, the pile is driven by driving a drop hammer or the like into the pile head (impact method), or the pile is driven by vibration of the vibratory hammer (vibration method) (see Patent Literatures 1 and 2).

While pile drivers equipped with both earth augers and drop hammers have been proposed, vibratory hammers have generally been used suspended from mobile cranes or attached to hydraulic excavators.

JP 2004-225298 A JP-A-09-264021

The hammering method described above has a problem of loud noise. The vibration construction method using a vibratory hammer produces less noise than the impact construction method, but there is a problem that the heavy machinery for the vibratory hammer is required in addition to the heavy machinery for the earth auger. In particular, there was also the problem that multiple heavy machines could not be used in narrow work sites. Furthermore, in either case, the direction of the piles needs to be manually adjusted by the workers using a crowbar. It was also difficult to handle the crowbar.

SUMMARY OF THE INVENTION An object of the present invention is to provide a pile driver that can drive piles more easily and a turning device used therein.

A turning device according to the present invention includes a support portion that is attached to a leader of a pile driver so that it can move up and down, and a turning portion that is connected above a vibratory hammer, and the turning portion can turn on the support portion. , the support includes a motor, and the turning portion turns relative to the support by a driving force from the motor.

A pile driver according to the present invention includes a leader, the turning device, and a vibratory hammer connected to a lower end of the turning device. rotates integrally with the rotating portion.

The turning device according to the present invention includes a support portion that is mounted on the leader so that it can move up and down, and a turning portion that is connected above the vibratory hammer and is connected to the support portion so that the vibratory hammer can turn freely. can be used Therefore, there is no need to use a heavy machine for the vibratory hammer separately from the heavy machine equipped with the leader. Moreover, since the vibratory hammer can be rotated, the orientation of the existing pile inserted into the vertical hole can be adjusted using the vibratory hammer.

Since the pile driver according to the present invention includes the above-described turning device, it is possible to obtain the same effects as described above.

BRIEF DESCRIPTION OF THE DRAWINGS The side view which shows the structure of the pile driver which concerns on this invention. The front view which looked at the turning device with which the pile driver shown in FIG. 1 is provided from the arrow A direction of FIG. FIG. 3 is a plan view showing the internal structure of a support portion included in the turning device shown in FIG. 2;

A pile driver according to an embodiment of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1, a pile driver 1 according to this embodiment includes a base machine 2. The base machine 2 includes a crawler-type running body 21 and a revolving body 22 mounted on the running body 21 so as to be able to turn. and a driver's seat 23 provided on the revolving body 22 .

The pile driver 1 further includes a leader 3 mounted on the revolving body 22 so as to be able to rise and fall; It has an earth auger 5 that can be moved up and down, a vibratory hammer 6, and a turning device 7 that supports the vibratory hammer 6. - 特許庁A head member 31 in which a plurality of pulleys (not shown) are arranged is provided at the top of the reader 3 . A hoisting wire W1 that is let out by a hoisting winch (not shown) and an auxiliary hoisting wire W2 that is let out by an auxiliary hoisting winch (not shown) are wound around these pulleys. An auxiliary winding hook H is suspended from the tip of the auxiliary winding wire W2.

The earth auger 5 includes an auger driver (auger main body) 51 that is vertically movable along the leader 3 and an auger screw (not shown) connected to the auger driver 51 . In the example shown in FIG. 1, a double-sided rack 32 that meshes with a pinion (not shown) of an auger driver 51 is arranged on the outer peripheral surface of the leader 3, and the auger driver 51 rotates the pinion forward and backward. , so that it can move up and down along the longitudinal direction of the reader 3 following the double-sided rack 32 . The auger screw is rotationally driven by the auger driver 51 and excavates the ground of the construction target area. Since the specific configuration of the earth auger 5 is well known, detailed description thereof will be omitted. Further, the lifting mechanism for the earth auger 5 is not limited to the one described above, and may be one that does not use the double-sided rack 32 or the pinion.

The vibratory hammer 6 includes a hanger 61 having a shackle 61a, a damper mechanism 62, an exciter 63 suspended from the hanger 61 via the damper mechanism 62, and an existing pile attached to the lower part of the exciter 63 (Fig. (not shown)), and a vertical vibrating force generated by the vibrator 63 vibrates and drives the existing pile. Since the configuration of the vibrating hammer 6 is well known, detailed description thereof will be omitted. The vibratory hammer 6 may be of any type, and may be of an electric type or a hydraulic type.

The vibratory hammer 6 is attached to the leader 3 via a swivel device 7 . More specifically, as shown in FIG. 2 , the reader 3 is provided with a pair of guide rails 33 extending in parallel along the longitudinal direction of the reader 3 , and the turning device 7 is vertically attached to the pair of guide rails 33 . A supporting portion 71 slidably fitted thereto and a turning portion 72 located below the supporting portion 71 are provided. The swivel portion 72 is horizontally swivelable with respect to the support portion 71 , and the vibratory hammer 6 is connected to the lower end of the swivel portion 72 .

3 and a worm gear G rotationally driven by the hydraulic motor M are accommodated in the support portion 71. The worm gear G extends in the horizontal direction and includes a worm G1 rotationally driven by the hydraulic motor M. , and a worm wheel G2 that meshes with the worm G1 and rotates in the horizontal direction. The revolving part 72 is connected to the output shaft of the worm wheel G2, and when the hydraulic motor M is driven, the revolving part 72 rotates integrally with the output shaft of the worm wheel G2 with respect to the support part 71 around the revolving axis C. to rotate horizontally.

Referring to FIG. 2, a pair of flanges 72a is provided at the lower end of the revolving portion 72, and a shackle 61a of the vibratory hammer 6 is suspended on a support shaft 72b passing through the pair of flanges 72a. It is connected to the swivel portion 72 so as to swivel integrally therewith.

A pulley 73 around which a hoisting wire W1 is wound is provided on the upper surface of the support portion 71, and when the hoisting wire W1 is wound or unwound by a hoisting winch (not shown), the turning device 7 operates as a vibratory hammer. 6 moves up and down along the leader 3.

Next, a pile driving method using the pile driver 1 according to this embodiment will be described. First, the earth auger 5 excavates the ground to a predetermined depth to form a vertical hole. Formation of the vertical hole by the earth auger 3 can be performed by a well-known method. Next, an existing pile (for example, H steel (not shown)) is slinged on the auxiliary hoisting hook H, lifted by an auxiliary hoisting winch (not shown), and inserted into a vertical hole. The revolving body 22 of the base machine 2 is revolved to adjust the position of the vibratory hammer 6 so that it is positioned above the existing pile. The upper edge of the web in the case of H steel) is gripped. At this time, if the orientation of the existing pile is misaligned, the orientation of the existing pile is adjusted by horizontally rotating the revolving part 72 together with the vibrating hammer 6 . Then, the vibratory hammer 6 is started as required to drive the existing pile to a predetermined depth.

Thus, according to the pile driver 1 of the present embodiment, the excavation process using the earth auger 5 and the driving process using the vibratory hammer 6 can be performed by only one heavy machine (the pile driver 1). Since it is possible, there is no need to use multiple heavy machines.

In addition, since the direction of the existing pile inserted into the vertical hole can be adjusted using the vibratory hammer 6, the burden on the operator can be reduced compared to manual work using a crowbar.

As described above, the pile driver according to the embodiment of the present invention has been described with reference to the accompanying drawings, but the present invention is not limited to such embodiment, and various modifications and modifications can be made without departing from the scope of the present invention. It is possible.

For example, in the above embodiment, a three-point pile driver is used as an example of a pile driver, but the type of pile driver is not limited, and for example, a suspension type pile driver may be used. Further, the turning device 7 in the above embodiment is not limited to a hydraulic type, and may be provided with an electric motor or the like in place of the hydraulic motor.

1 pile driver 2 base machine 3 leader 5 earth auger 6 vibratory hammer 7 swivel device 22 swivel body 71 support portion 72 swivel portion

Claims (5)

a support portion attached to a leader provided in the pile driver so as to be able to move up and down;
a rotating part connected above the vibratory hammer,
The swivel portion is rotatably connected to the support portion,
the support includes a motor;
A turning device, wherein the turning part turns with respect to the supporting part by a driving force from the motor. with the leader;
a turning device attached to the reader so as to be able to move up and down;
a vibratory hammer connected to the lower end of the turning device,
The turning device is the turning device according to claim 1,
A pile driver, wherein the vibratory hammer rotates integrally with the rotating portion. Equipped with a hoisting winch,
The support portion is provided with a pulley around which a hoisting wire fed out from the hoisting winch is wound,
The reader is provided with a guide rail extending in the longitudinal direction of the reader,
3. The pile driver according to claim 2, wherein said support portion is slidably fitted to said guide rail. 4. The pile driver according to claim 2, further comprising an earth auger attached to said leader so as to be able to move up and down. The support portion has a worm that is rotationally driven by the motor and a worm wheel that meshes with the worm, and the turning portion is connected to an output shaft of the worm wheel,
The pile driver according to any one of claims 2 to 4, wherein when the motor is driven, the rotating portion rotates horizontally with respect to the supporting portion integrally with the output shaft.

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