JP2006322151A - Pliers for foundation pile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for performing the installing and releasing work of pliers in a short time to a pile head of a foundation pile. <P>SOLUTION: This point exists in the pliers for the foundation pile characterized by being constituted to be fixed by opening and closing a cam plate with a pad for push-expanding and gripping the inner peripheral surface of the pile head by a gear, an eccentric shaft and the cam action, by using torque for construction. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a yatco that is used for driving a foundation pile into the ground by connecting to the pile head and driving the tip of the foundation pile to the support ground, and more particularly to a yatco that is detachable from the pile head. .

  Some foundation piles are equipped with a device that grips and detaches the pile head, but this type of conventional detachment device is formed as a device that is larger than the outer shape of the pile. It had to be used with additional processing of shaft and strengthening material,

Or there was a fault that a big torque could not be transmitted.
Japanese Examined Patent Publication No. 7-103666 Japanese Examined Patent Publication No. 7-103565 Japanese Patent Publication No. 7-103564

  The problem to be solved is that a pile head that has not been processed is held firmly in the inner diameter of the pile, and can be gripped and detached firmly and securely only by the rotational force for construction.

  The present invention was made in order to solve the conventional problems as described above, and provides the one that can perform the attaching and releasing operations of the yatco to the pile head of the foundation pile in a short time. The gist is to open and close a padded cam plate that pushes and grips the inner peripheral surface of the pile head with the gear, eccentric shaft and cam action using the rotational force for construction. It is in the foundation pile yatco that is structured to be fixed.

  As described above, the yatco for foundation piles according to the present invention pivots on the main body of the yatco so that the gripping contact surface of the cam plate with the pad that sandwiches the inner peripheral surface of the pile head can be freely moved in and out. Since it is configured to be fixed by cam action only by the rotational force for construction, gripping and releasing work of the Yatco with respect to the pile head of the foundation pile should be performed safely and in a short time without the need for another drive source. If you can, you can use it repeatedly.

  Without installing a work piece on the pile head of the foundation pile, the inner peripheral surface of the pile head is pushed out and released, and the rotational force for construction can be applied without installing a work piece on the pile head of the current foundation pile. It was realized using.

  FIG. 1 is an overall explanatory view showing an embodiment of a foundation pile yatco according to the present invention. A first cam plate (10) is a central screw portion (101) shown in FIG. ) And the second cam plate (20) is rotatably installed at the central eccentric shaft portion (102) shown in FIG. 7 of the rotating shaft (100). The plate (10) includes a second cam plate support shaft (50), and the first cam plate (10) and the second cam plate (20) support the second cam plate. The shaft (50) is inserted into the long hole and installed so as to be freely accessible.

  Below that, a third cam plate (30) and a fourth cam plate (40) are installed, and the fourth cam plate (40) is the same as the first cam plate (10). The third cam plate (30) is the same as the second cam plate (20), and the central eccentric shaft portion (103) shown in FIG. The installation positions of the eye cam plate support shaft (51) and the second cam plate support shaft (50) are changed and installed on the inner surface of the pile head (250) so that the cam plates are gripped in a well-balanced manner.

The cam plates (10), (20), (30), (40) are provided with a spring plate (70) and a stop plate (140) on the upper surface of the first cam plate (10). A spring plate (60) and a stop plate (80) are installed on the lower surface of the first cam plate (40), and the stop plate (140) includes a flange portion (104) of the rotating shaft (100) and a nut (90 ) Is detachable between the two.

A bearing (110) and a bearing (111) are detachably installed in the holder (120) at the upper part of the flange portion (104) so that the rotating shaft (100) can be rotated. The sheet cam plate (10) is connected by a torsion spring (130) to stop the rotation of the rotating shaft (100), and the torsion spring (130) is installed so as to be able to rotate left and right.

A bearing (151) is provided on the outer side of the holder (120) on the main body (150) and is rotatably installed on the holder load surface (122), and an internal gear shown in FIG. The pinion (160) installed on the upper part of the rotating shaft (100) is meshed.

A bearing (240) is provided on the upper portion of the Yatco body (150), and an upper bearing holder (200) firmly connected to the body (230) is integrated by a connecting pin (220), and the pinion (160) Has a washer (180) and a spring spring (190) inserted therein, and an eccentric upper part of the rotating shaft (100) is detachably installed with a nut (210) nut, and the rotating shaft can rotate together with the pinion (160). It is like that.

A torsion spring (170) is installed and connected between the pinion (160) and the holder (120) shown in FIG. 1 to stop the rotation of the pinion (160) and the holder (120). As shown in FIG. 3, the torsion spring guide (131) surrounds the torsion spring (170).

After the Yatco (150) is inserted into the pipe head (250) from the top and installed at the holder installation position (121), the load of the main body is the holder load surface (122), the holder installation position (121), the pile head As shown in FIG. 2, torque is transmitted to the internal gear (152), the pinion (160), and the rotating shaft (100), and the first cam plate (10) and the second cam plate (20 ) And the third cam plate (30), the fourth cam plate (40), and the inner surface of the pile head (250).

As for the transmission from the cam plate to the inner surface of the pile head (250), the first cam plate (10) shown in FIG. 5 is the first cam plate main body (11), the first cam plate clamp (12), the first one The cam plate pads (13), (14), the second cam plate support shaft (50) and the rotation shaft central screw portion (101) are provided, and the torsion spring (130) is connected to the rotation shaft. When (100) rotates, it comes into contact with the inner surface of the pile head (250) as shown in FIG. 6, and the second cam plate (20) shown in FIG. 7 is the second cam plate main body (21) and the second cam. The plate pad (22) and the second cam plate pad (23) are integrated with the central eccentric shaft portion (102) of the rotation shaft (100) so as to be rotated to the position shown in FIG. The shaft (100) rotates to contact the inner surface of the pile head (250) at the rotational position of FIG.

At this time, the fourth cam plate (40) shown in FIG. 1 is in the same position as the first cam plate (10) shown in FIG. 5, and the third cam plate (30) shown in FIG. Although the cam plate (20) moves in the same manner, the fourth cam plate (40) contacts the inner surface of the pile head (250) at the position shown in FIG. Further, when rotating to the position shown in FIG. 12 and coming into contact with the inner surface of the pile head (250), the cam plates (10) to (40) are pushed and spread in a wide range in three directions on the inner surface of the pile head (250).

This gripping causes the central eccentric shafts (102) and (103) to bite into the inner surfaces of the cam plates (20) and (30) and the pile head (250), resulting in a firm grip. The grip is released from the peripheral surface.

In another embodiment of the present invention, as shown in FIGS. 1, 4, and 4, the torsion spring (130) is connected to the holder (120) and the first cam plate (10) to release the grip. Even if torque is not always returned to the origin by returning the torque to the main body (230), if the cam plates (10) to (40) come out of contact with the inner peripheral surface of the pile head, the elasticity of the torsion spring (130) Thus, the first cam plate (10) is returned to the position shown in FIG. 5 and a spring for restoring the rotation shaft (100) to the origin is installed.

As another embodiment of the present invention, as shown in FIG. 3, the torsion spring (170) is installed, the pinion (160) and the holder (120) are connected, and the torsion spring guide (131) is used to release the main body. Even if the torque is not returned to the origin by returning the torque to (230), if the contact from the cam plate (10) to the inner peripheral surface of the pile head comes off, the elasticity of the torsion spring (170) The pinion (160) is returned to the position indicated by 2 and a spring for restoring the rotation axis (100) to the origin is installed.

When the main body (230) is pulled up, the rotating shaft (100) is located at the origin position shown in FIG. Since the first cam plate (10) is provided and the whole is kept in the posture, it is possible to easily perform detachment insertion.

BRIEF DESCRIPTION OF THE DRAWINGS It is the whole explanatory drawing which showed one Example of the yatco for foundation piles which concerns on this invention. It is sectional drawing of the upper rotational drive part of the same Yatco. It is installation sectional drawing of the upper torsion spring of the same Yatco. It is installation sectional drawing of the lower torsion spring of the same Yatco. It is sectional drawing of the 1st cam board part origin of the Yatco. It is sectional drawing at the time of the 1st cam plate part pipe | tube inner diameter contact of the same Yatco. It is sectional drawing of the 2nd cam board part origin of the Yatco. It is sectional drawing of the 2nd cam board part following rotation rotation of the same Yatco. It is sectional drawing at the time of the 2nd cam board part pipe | tube internal diameter contact of the same Yatco. It is sectional drawing of the 3rd cam board part origin of the Yatco. It is sectional drawing of the 3rd cam board part following rotation rotation of the same Yatco. It is sectional drawing at the time of the 3rd cam board part pipe | tube internal diameter contact of the same Yatco

Explanation of symbols

10 First cam plate 11 First cam plate main body 12 First cam plate clamp 13 First cam plate pad 14 First cam plate pad 15 First cam plate pad clamp 20 Second cam plate 21 2 Second cam plate body 22 Second cam plate pad 23 Second cam plate pad 30 Third cam plate 40 Fourth cam plate 50 Second cam plate support shaft 51 Third cam plate support shaft 60 Bleed spring 70 Bread spring 80 Stop plate 90 Nut 100 Rotating shaft 101 Rotating shaft central screw portion 102 Central eccentric shaft portion 103 Central eccentric shaft portion 104 Flange portion 110 Bearing 111 Bearing 120 Holder 121 Holder installation position 122 Holder load surface 130 Torsion spring 131 Torsion spring guide 140 Stop plate 150 Yatco body 151 Bearing 152 Internal gear 160 Pinion 170 Torsion 180 washer 190 Belleville 200 upper bearing holder 210 nut 220 connecting pin 230 the body 240 bearing 250 Pile

Claims (3)

  The cam plate with a pad that pushes and spreads the inner peripheral surface of the pile head can be opened and closed. When pivotally attached to the main body, the cam plate is opened and closed by the cam action only by the rotational force. Yatco for foundation pile characterized by comprising.   In the foundation pile yatco according to claim 1, the origin of the cam plate with the pad that pushes and spreads the inner peripheral surface of the pile head is held at the origin of the torsion spring, regardless of which of the left and right rotations is held. Yatco for foundation pile.   In the foundation pile yatco according to claim 1, whether the origin of the eccentric rotation shaft that pushes and holds the inner peripheral surface of the pile head is held by left and right rotation is secured by the origin of the torsion spring. Yatco for foundation pile.

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