JP4122498B2 - Rotation assist device for columnar material rotary press-fitting machine - Google Patents

Description

  The present invention connects a steel pipe casing, a steel pipe pile, a concrete pile, and other various hollow or solid columnar materials to an output shaft of a rotary drive part including a motor supported by a mast so as to be movable up and down. The present invention relates to a rotation assisting device for energizing a rotational force when a torque becomes insufficient with only the rotational drive unit in a columnar material rotary press-fitting machine that rotates a columnar material with the rotational force of the shaft and press-fits it into the ground.

  For example, in a steel pipe pile rotary press machine that hangs down by connecting the upper end of a steel pipe pile having a drilling blade at the lower end to the output shaft of a rotary drive unit including a drive motor that is supported by a leader mast so as to be movable up and down, The rotational force necessary for the rotation of the pile corresponds to the force excavated by the excavating blade at the lower end of the steel pipe pile and the force rotating against the friction received by the steel pipe pile surface. However, when it becomes impossible to rotate due to gravel or the like during the press-fitting, or when it receives static friction at the time of starting after being stopped, a rotational force that overcomes these is required for restarting.

  In order to cope with this, conventionally, a proposal has been made to provide a drive motor with a high torque in the rotation drive unit. However, the rotation drive unit is large and heavy, and is not preferable for the stability of the press-fitting machine. In addition, the development of a rotation assist type that supports the existing drive motor has been requested.

  Therefore, an attempt was made to add an auxiliary motor to the rotation drive unit and to urge the auxiliary motor from the auxiliary motor to the existing motor when necessary. However, the existing motor has a higher rotation speed than the normal auxiliary motor, and both rotation speeds are synchronized. Therefore, after the load is reduced to a level where the steel pipe pile can be rotated only with the existing motor, the auxiliary motor cannot be idled. It was.

  The present invention does not impair the stability of the rotary press-fitting machine, and when the load is reduced until the columnar material can be rotated only by the existing motor by the rotation assist, the rotation assist can be switched without any trouble to the rotation only by the existing motor. It is an object to provide an apparatus.

As means for solving the above problems, the present invention provides:
In a columnar material rotary press-fitting machine that hangs by connecting one end of a columnar material to the output shaft of a rotary drive unit that includes a motor supported by the leader mast so as to be movable up and down,
The above-mentioned leader mast supports the rotation assisting device so that it can be raised and lowered and cannot turn,
The rotation assist device is
A rotating body surrounding the columnar material, and an auxiliary rotating frame concentrically positioned outside the rotating body, each rotatably provided;
An auxiliary motor for continuously rotating the auxiliary rotating frame in one direction;
The auxiliary rotating frame and the rotating body are connected to transmit the rotation to the rotating body during one-way continuous rotation of the auxiliary rotating frame, and the rotation is more than the rotation of the rotating body transmitted from the auxiliary rotating frame. A one-way clutch mechanism for releasing the connection when the rotation of the rotating body transmitted from the drive unit becomes faster;
Equipped with elevating means for elevating and lowering the rotation auxiliary device along the leader mast, and connecting means for detachably connecting the rotating body with the output shaft of the rotation drive unit when the ascending apparatus is raised,
A rotation assist device in a columnar material rotary press-fitting machine is proposed.

  According to the rotation assisting device in the columnar material rotary press-fitting machine of the present invention, the rotation assisting device may be lowered to the lower part of the leader mast when not in use, or it is raised during use and connected to the output shaft of the rotation drive unit. When the columnar material is already pressed into a considerable length of land, the rotary press can be kept stable, and when the columnar material becomes unable to rotate due to gravel, etc., or restart after being stopped Sometimes when receiving static friction, rotate the columnar material against the load by raising the rotation assist device and connecting it to the output shaft of the rotation drive unit to urge the rotation of the auxiliary motor to the rotation drive unit At that time, when the load is reduced until the columnar material can be rotated only by the motor of the rotary drive unit, the clutch mechanism is released and idles, thereby preventing the occurrence of the braking action found in the conventional proposal. Can Thus, in operation, stopping the auxiliary motor after confirming normal rotation of the columnar member may be performed separation of the output shaft and the rotation assisting device, the operating safety is of readily Kagae.

  The “columnar material rotary press-fitting machine” in which the rotation assisting device according to the present invention is used is one in which only the columnar material is connected to the output shaft of the rotation drive unit, and the columnar material is rotated and press-fitted. A screw rod having a drilling blade at the lower end is connected to the output shaft in a state of being inserted into the hollow of the hollow columnar material, the hollow columnar material and the screw rod are rotated, and the hollow rod shape is rotated by the screw rod. There are a medium digging type that press-fits while digging inside the material, and other various types.

  In the former case, an appropriate excavating blade is preferably provided at the lower end of the columnar material.

  The "one-way clutch mechanism" includes a claw and a claw wheel, an internal friction clutch, a free rotation clutch, a centrifugal clutch, and other various clutches.

  Furthermore, as the “lifting means” of the rotation assisting device, a wire rope connected to the rotation assisting device is wound and unwound by a winch, and various other devices are used.

  Further, in the “connecting means” between the rotating body and the output shaft of the rotation driving unit, the rotating body is connected to the columnar member connection cap fixed to the output shaft, or directly to the output shaft, and to a pin and pin hole engagement. , Spline engagement, and other connecting means are used.

  In FIG. 1, a leader mast (2) is vertically supported on the front end portion of the crawler (1), and a guide rail (3) and (3) laid on the front surface of the mast (2) are provided with a motor (5) and a speed reducer. A rotary drive unit (4) having a machine (6) is supported so as to be slidable up and down via a slide fitting (7), and is suspended up and down by a wire rope (8). The columnar member connection cap (10) is fixed to the output shaft (9) protruding from the lower surface, and the upper end of the steel pipe pile (11) having a drilling blade at the lower end in this example can be transmitted to the connection cap (10). Further, the rotation auxiliary device (A) is supported on the leader mast (2) of such a steel pipe pile rotary press-fitting machine so as to be able to move up and down and not to turn.

  The structure of the rotation assist device (A) is as follows. 2, 3, and 5, the flat cylindrical gear box (12) is rotatably supported by the ball bearings (14) and (15) in a state where the short cylindrical rotating body (13) is passed through the box. In (12), an auxiliary rotating frame (23) made of an annular large gear is supported outside the rotating body (13) by a ball bearing (24) so as to be rotatable at a position concentric with the rotating body (13). As a one-way clutch mechanism between the auxiliary rotating frame (23) and the rotating body (13), in this example, the ratchet wheel (25) is fixed to the outer peripheral surface of one rotating body (13), and the other Four claws (26) that rotate the claw wheel (25) only in one direction (counterclockwise in FIG. 3) are supported by the shaft (27). Each claw (26) is always bulleted in a direction to engage with the claw wheel (25) by an appropriate spring (not shown).

  As a driving means for continuously rotating the auxiliary rotating frame (23), two auxiliary motors (28), (28) are installed on one side of the upper surface of the box (12), and both motors (28), (28) The small gears (30) and (30) are respectively fixed to the output shafts (29) and (29) protruding into the box (12), and these small gears are connected to the teeth of the auxiliary rotating frame (large gear) (23) ( 23 ').

  The above-mentioned rotation assisting device (A) is moved up and down by engaging the slide fittings (31) and (31) protruding from the back of the gear box (12) with the leader mast guide rails (3) and (3). It is supported so that it can slide and cannot turn.

  Means for connecting the rotating body (13) of the rotation assisting device (A) to the output shaft (9) of the rotation driving unit (4) is as follows. A flange (33) is formed at the upper end of the rotating body (13) and protrudes upward from the upper surface of the gear box (12). On the flange (33), as shown in FIGS. 34) and (34) project upward, and a flange (35) is formed at the lower end of the cylindrical columnar member connecting cap (10) connected to the lower end of the output shaft (9). On the lower surface of (35), as shown in FIG. 4, the rotation transmission pins (34), (34) and the removable rotation transmission sleeves (36), (36) are attached to the pins (34), (34). Projected downward at the corresponding position.

  As a means for raising and lowering the rotation assisting device (A), as shown in FIG. 1, a gear box (12) is suspended by a wire rope (39), and the wire rope (39) is crawled through a top sheave (1 ) Is connected to a winch (not shown).

  In FIG. 4, a plurality of locking grooves (37) and (37) extending in the bus bar direction are formed on the inner peripheral surface of the columnar member connection cap (10), and the upper end of the steel pipe pile (11). A plurality of locking ridges (38), (38) are provided on the outer peripheral surface of the portion, and the upper end portion of the steel pipe pile (11) is inserted into the cap (10) and the locking ridges (38), ( 38) is engaged with the engaging grooves (37) and (37) so as to be able to transmit rotation.

  The operation of the above example will be described next. With the rotation auxiliary device (A) lowered near the lower end of the leader mast (2), the motor (5) of the rotation drive unit (4) is started and the steel pipe pile (11) is rotated to return to the ground Start press-fitting. During the press-fitting, when the rotation of the steel pipe pile (11) is stopped by gravel in the ground, first, the rotation auxiliary device (A) is raised to the connection cap (10) by winding the wire rope (39), The rotation transmission pins (34) and (34) are inserted into the rotation transmission sleeves (36) and (36) of the connection cap (10).

  Next, the motor (5) of the rotation drive unit (4) is restarted to transmit the rotation to the steel pipe pile (11), and at the same time, the auxiliary motors (28) and (28) are started to start the auxiliary rotating frame (23). 3 is continuously rotated counterclockwise in FIG. 3, and the claw wheel (25) is continuously rotated in the same direction by the claws (26), and this rotation passes through the rotating body (13) and the connection cap (10) to the steel pipe pile ( 11), and thereby the steel pipe pile (11) can overcome the load of gravel and the static friction and can rotate.

  The steel pipe pile (11) exceeds the load such as gravel and can be rotated only by the rotational force of the motor (5) of the drive unit. As a result, the rotation of the steel pipe pile (11), that is, the rotation of the rotating body (13) Even if the rotation is faster than the rotation of (23), the ratchet wheel (25) does not feed the claws (26). Therefore, after confirming the normal rotation of the steel pipe pile (11), the worker stops the auxiliary motors (28) and (28), and then lowers the rotation auxiliary device (A) by unwinding the wire rope (39). Then, the rotation transmitting pins (34), (34) are detached from the sleeves (36), (36) and lowered to the lower part of the original leader mast. In this way, the original steel pipe pile rotary press-in is continued.

It is a side view of the steel pipe pile rotary press machine provided with the rotation auxiliary device of the present invention. It is an enlarged plan view of a rotation auxiliary device. It is an expansion transverse top view of a rotation auxiliary device. It is an expansion partially notched side view of a columnar material connection cap part. It is the VV line expanded sectional view of FIG.

Explanation of symbols

A Rotation assisting device 2 Leader mast 4 Rotation drive unit 5 Motor 9 Output shaft 11 Steel pipe pile 13 Rotating body 23 Auxiliary rotation frame 25 Claw wheel 26 Claw 28 Auxiliary motor 34 Rotation transmission pin 36 Rotation transmission sleeve 39 Wire rope

Claims (1)

In a columnar material rotary press-fitting machine that hangs by connecting one end of a columnar material to the output shaft of a rotary drive unit that includes a motor supported by the leader mast so as to be movable up and down,
The above-mentioned leader mast supports the rotation assisting device so that it can be raised and lowered and cannot turn,
The rotation assist device is
A rotating body surrounding the columnar material, and an auxiliary rotating frame concentrically positioned outside the rotating body, each rotatably provided;
An auxiliary motor for continuously rotating the auxiliary rotating frame in one direction;
The auxiliary rotating frame and the rotating body are connected to transmit the rotation to the rotating body during one-way continuous rotation of the auxiliary rotating frame, and the rotation is more than the rotation of the rotating body transmitted from the auxiliary rotating frame. A one-way clutch mechanism for releasing the connection when the rotation of the rotating body transmitted from the drive unit becomes faster;
Equipped with elevating means for elevating and lowering the rotation auxiliary device along the leader mast, and connecting means for detachably connecting the rotating body with the output shaft of the rotation drive unit when the ascending apparatus is raised,
Rotation assist device for columnar material rotary press-fitting machine.

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