KR20140030082A - Pile driver - Google Patents

Abstract

Provided is a pile driver having a backstay capable of having improved strength and suppressing the increase of weight. The pile driver has a backstay supporting, from the rear part of the base machine, a leader installed on the front of a base machine to be lifted. The backstay is formed by connecting a plurality of middle stay members (25) between an upper stay member connected to the leader and the lower stay member connected to the stay cylinder. The middle stay member includes: a main body (26) made of a metal cylinder body; flanges (27) to connect install on the outer circumferences both ends of the main body, respectively; an outer reinforcing member (28) installed between the back surface of the flange and the outer surface of the end part of the main body; and an inner reinforcing member (29) installed along the inner circumferential surface of one end of the main body.

Description

Driving {PILE DRIVER}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a navigator for carrying out a steering operation, having a backstay supporting a leader installed on the base machine from the rear of the base machine.

The cruiser is guided to the base machine, a leader installed on the front of the base machine so that the base machine can be undulated, a backstay supporting the leader from the rear of the base machine, and a guide pipe installed on the leader. The lifting device includes a work device such as an auger driver. The driving operation is performed by attaching a work member such as a rod to the work apparatus, and lifting the work apparatus along the leader while rotating the work member by the work apparatus. The leader is formed by connecting a plurality of leader members of appropriate lengths, and the length of the leader can be adjusted by setting the number of connections of the leader members in accordance with the contents of the work. In addition, it is necessary to change the length of the backstay according to the length of the reader, and the stay member is appropriately inserted between the leader attaching side of the backstay upper end and the stay cylinder side of the lower end so as to have a predetermined length ( For example, refer patent document 1).

Japanese Unexamined Patent Publication No. 2010-13814

Since the load acts in the bending direction or the torsion load acts on the leader, the backstay supporting the leader also requires strength to withstand the load in each direction acting from the leader. However, when the thickness of the steel pipe forming the stay member of the backstay is increased, the weight increases, so that the manufacturing cost of the stay member is increased or adversely affects the transportation of the stay member. Since the weight of is increased, it also affects the base machine.

Therefore, an object of the present invention is to provide a flying machine having a backstay having improved strength while suppressing an increase in weight.

In order to achieve the above object, the anti-taking device of the present invention, in the anti-taking device having a backstay supporting a leader, which is reciprocally installed in the front part of the base machine, from the rear part of the base machine, the backstay is connected to the reader. A plurality of intermediate stay members are formed between the upper stay member and the lower stay member connected to the stay cylinder, wherein the intermediate stay member is a main body made of a metal cylindrical body and a connection provided at both ends of the main body, respectively. And a reinforcing member provided between the flange of the dragon, the back surface of the flange and the outer peripheral surface of the end of the main body, and an internal reinforcing member provided along the inner peripheral surface of the end of the main body.

In addition, the anti-taking device of the present invention is formed by a pair of arc-shaped plate members in which the inner reinforcing member is formed by dividing a cylinder having an outer diameter corresponding to the inner diameter of the main body in half. The opening angle of the circular arc is set smaller than 180 degrees, and the gap for welding is formed between the edges of the arc-shaped sheet material when the circular plate member is inserted into the main body.

According to the anti-taking device of the present invention, the inner reinforcing member is provided along the inner circumferential surface of the end of the intermediate stay member, thereby improving the strength of the intermediate stay member without increasing the thickness of the steel pipe forming the main body of the intermediate stay member. can do. Therefore, the strength of the backstay is improved while suppressing the increase in the weight of the entire backstay. In addition, by forming the internal reinforcing member from a pair of arc-shaped plate members, insertion and welding in the main body can be easily and surely performed.

BRIEF DESCRIPTION OF THE DRAWINGS It is a side view which shows one example of the anti-taking of this invention.
2 is a front view of the driving machine.
3 is a partial cross-sectional side view showing an example of an intermediate leader member.
4 is a cross-sectional view taken along line IV-IV of FIG. 3.

1 to 4 show one embodiment of the anti-aircraft of the present invention. The navigator 11 shown in this form example has the base machine 14 which provided the upper revolving structure 13 so that the revolving upper structure 13 was rotatable on the lower traveling body 12 provided with the crawler, The leader 16 mounted in a undulating manner through the front bracket 15 installed at the front part of the upper swinging body 13 and the leader 16 installed in a working state of the upper swinging body 13 Auger driver guided and lifted by a pair of left and right backstays 17 supported from the rear part and a pair of right and left guide pipes 18 provided on the front side of the leader 16. And working devices (not shown). Moreover, the front jack 19 and the rear jack 20 are provided in four places of the front, rear, left, and right sides of the upper swing body 13, respectively.

The backstay 17 is formed by connecting a plurality of stay members, the upper stay member 22 connected to the holder member 21 provided on the leader 16, and the base machine 14. The lower stay member 24 connected to the stay cylinder 23 provided at the rear of the < RTI ID = 0.0 >), < / RTI > and the plurality of intermediate stay members 25 connected between the upper stay member 22 and the lower stay member 24. It is formed by connecting.

As shown in FIG. 3 and FIG. 4, the intermediate stay member 25 includes a main body 26 made of a metal cylindrical body, and flanges 27 and 27 for connection respectively provided at outer peripheries of both ends of the main body 26. And an outer reinforcing member 28 having a substantially triangular shape provided between the rear surface of each flange 27 and the outer peripheral surface of the end portion of the main body 26, and the inner reinforcing member 29 provided along the inner peripheral surface of the end portion of the main body. . On the other hand, even if the length of the intermediate stay member 25 is different, it basically has the same structure, and the flange side of the upper stay member 22 and the lower stay member 24 also has the same structure.

The internal reinforcing member 29 is formed of a pair of arc-shaped plate members 29a and 29a having a shape in which a cylinder having an outer diameter corresponding to the inner diameter of the main body 26 is divided in half. The opening angles of the arcs in the arc-shaped plate members 29a and 29a are set smaller than 180 degrees, and the arc-shaped plate members 29a and 29a can be easily inserted into the inside of the main body 26. The gap 29b for welding is formed between the edges of the arc-shaped board | plate material 29a, 29a. As a result, the insertion of the arc-shaped plate members 29a and 29a into the inside of the main body 26 and the fixing of the arc-shaped plate members 29a and 29a to the inside of the main body 26 can be easily performed. .

By providing such internal reinforcing members 29 at the inner circumference of both ends of the main body 26, the strength of the backstay 17 which connected the intermediate stay member 25 can be improved. Therefore, even if the load in the bending direction or the torsion direction acts on the reader 16 during the driving operation, the backstay 17 can reliably support the reader 16 in a predetermined state. On the other hand, the thickness of the internal reinforcing member 29 and the length in the axial direction can be appropriately set according to the strength required for the backstay 17.

11: driving 12: lower vehicle
13: upper swing body 14: base machine
15: front bracket 16: reader
17: backstay 18: guide pipe
19: front jack 20: rear jack
21: holder member 22: upper stay member
23: stay cylinder 24: lower stay member
25: intermediate stay member 26: the body
27 flange 28 outer reinforcement member
29: internal reinforcing member 29a: arc-shaped plate
29b: gap

Claims (2)

In a navigator having a backstay supporting a leader, which is installed in a front and rear of the base machine so as to be able to be undulated, from the rear of the base machine, the backstay is connected to the reader. A plurality of intermediate stay members are formed between the upper stay member and the lower stay member connected to the stay cylinder, wherein the intermediate stay member is provided on a main body made of a metal cylindrical body and on both outer peripheries of the main body, respectively. A driving machine comprising a connection flange, an external reinforcing member provided between the rear face of the flange and the outer peripheral surface of the end of the main body, and an internal reinforcing member provided along the inner peripheral surface of the end of the main body. The said inner reinforcing member is formed from a pair of circular arc-shaped board material of the shape which divided the cylinder which has the outer diameter corresponding to the inner diameter of the said main body in half, and is in the said arc-shaped board material The opening ride of a circular arc is set smaller than 180 degree | times, and the space | interval for welding is formed between the edges of the edge part of circular arc-shaped board material, when the circular-shaped board material is inserted in the inside of a main body.

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