JPH0426553Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a foundation construction machine used for excavation, piling work, etc.

(Prior Art and its Problems) Conventionally, as a foundation construction machine, there is one described in Japanese Patent Application Laid-Open No. 106888/1988, which was devised by the inventor of the present application. The upper end of the support arm, whose center part is rotatably supported by the crane body, which is the machine body, is rotatably connected to a leader for supporting an elevating member such as an auger machine, and between the leader and the machine body. A backstay for elevating and elevating the leader is disposed at the top, and a cylinder device for tilting the leader is disposed between the lower end of the support arm and the machine body.

According to the above-mentioned conventional foundation construction machines, it is necessary to attach and detach the coupling device that connects the support arm and the leader tilting cylinder device every time the leader is elevated or raised, which takes time and effort. There is a problem.

(Purpose of the invention) In view of the above-mentioned conventional problems, the purpose of the invention is to provide a foundation construction machine that does not require any work such as attaching and detaching connectors when elevating the leader using a cylinder device for elevating the leader. shall be.

(Means for Solving the Problems) In order to solve the above-mentioned conventional problems, the present invention provides an auger that connects the upper end portion of the intermediate connecting member 8 whose central portion is pivotally connected to the machine body 3 so as to be rotatable. It is rotatably connected to a leader 7 for supporting an elevating member of a machine, etc., and a cylinder device 9 for elevating the leader is disposed between the upper end of the intermediate connecting member 8 and the machine body 3, and the intermediate connecting member A structure in which a leader tilting cylinder device 10 is disposed between the lower end of the leader 8 and the lower part of the leader 7 is adopted.

According to the above configuration, when the cylinder device 9 for elevating and elevating the leader is operated to expand and contract, the leader 7 is moved upward and downward together with the intermediate connecting member 8 and the cylinder device 10 for tilting.

This embodiment employs a structure in which a leader lifting device 5 is interposed between the intermediate connecting member 8 and the leader 7.

According to the above configuration, when the leader 7 is raised or lowered, the leader 7 is brought into contact with and separated from the ground by the leader elevating device 5.

(Example) An example of the present invention will be described based on the drawings.
Figures 3 to 5 are general views of a foundation construction machine such as a digging machine or a pile driver, and the machine includes a running vehicle body 2 having an endless track 1 such as a caterpillar, and a running vehicle body 2 having a track 1 such as a caterpillar. A machine main body 3, which is a crane main body, is arranged to be freely rotatable, and a central part is rotatably supported by a support frame 4 that protrudes forward of the machine main body 3, and an upper end is connected to an auger via a leader lifting device 5. An intermediate connecting member 8 rotatably connected to a leader 7 for supporting an elevating member 6 of a machine, etc.; a cylinder device 9 for elevating the leader disposed between the upper end of the connecting member 8 and the support frame 4; , the lower end of the intermediate connecting member 8 and the leader 7
and a pair of leader tilting cylinder devices 10 disposed between the lower part of the leader and the lower part of the leader. Reference numeral 11 denotes a winch device for lifting stakes and the like, and its wire rope 12 is suspended through the central portion of the leader 7 and a sheep 13 at the top thereof.

As shown in FIGS. 1 and 2, the intermediate connecting member 8 includes a rectangular cylindrical connecting member main body 8a parallel to the leader 7, and a pair of connecting member main bodies 8a extending diagonally downward toward the machine main body 3. The connecting arm 8b is connected to the support frame 4 by a support shaft 15.
are pivotally connected via.

The leader elevating device 5 includes a leader elevating cylinder device 17 which is inserted into the lower part of the connecting member main body 8a and fixed with a pin 16, and a cylinder device 17 for elevating the leader which is inserted into the upper part of the connecting member main body 8a and has a cross joint 18 at the upper end. The lifting block 19 is connected to the leader 7 via a lifting block 19 and is raised and lowered by a cylinder device 17 for raising and lowering the leader. In particular, as shown in FIG. 2, the cross joint 18 is rotatably supported by the bracket 20 of the leader 7 via an upper horizontal shaft 21.
It is rotatably connected to the upper end of the lifting block 19 via a lower horizontal shaft 22 that extends in a direction perpendicular to the upper end of the lifting block 19.

The leader elevation cylinder device 9 has its upper and lower ends connected to the upper end bracket 23 of the connecting member main body 8a and the support frame 4 via pins 24a and 24b, respectively.

The leader tilting cylinder device 10 has one end connected by a pin to a connecting rod 25 at the lower end of the connecting arm 8b, and the other end provided parallel to the lower end of the leader 7 via a pair of engaging arms 27, 27. The guide pipe 26 is engaged with the guide pipe 26 so as to be movable up and down. As clearly shown in FIG. 2, the engaging arm 27 includes an arcuate guide plate 27a that abuts each guide pipe 26 in a movable manner, and a pair of connecting plates 27b, 27b that connect the two guide plates 27a. The leader tilting cylinder device 10 is installed between both connecting plates 27b.
The tip of the piston rod is inserted and connected with a pin.

In the above configuration, the state shown in FIG. 3 is the working state of foundation work, in which the auger screw and casing are attached to the elevating member 6 and excavation work is performed, and piles are attached to the elevating member 6 and the pile driving work is performed. This is what we do. In the case of diagonal hole drilling or diagonal piling work, the piston rod of the leader tilting cylinder device 10 is expanded and contracted as appropriate, thereby tilting the leader 7 back and forth about the lower horizontal shaft 22 as a fulcrum. All you have to do is tilt it at an angle.

Next, when folding the leader 7 into a horizontal state, from the upright state shown in FIG. 7 is raised, the leader 7 is separated from the ground, and then the leader 7 is rotated backward around the horizontal support shaft 15 by the cylinder device 9 for elevating the leader, as shown in FIG. , the intermediate connecting member 8 and the leader tilting cylinder device 10 also rotate together with the leader 7, and can be folded into a horizontal state as shown in FIG. In this way, there is no need to attach or detach the connector when the leader is moved up or down.

(Effect of the invention) According to the foundation construction machine of the invention, when elevating the leader using the cylinder device for elevating the leader, there is no need for any work such as attaching and detaching the connector, making the elevating and elevating work of the leader quick and easy. It can be done.

If a leader elevating device is interposed between the intermediate connecting member and the leader as in the embodiment of the present invention, the leader can be brought into contact with and separated from the ground when the leader is raised or lowered, The leader can be moved up and down more easily, and the machine body can be freely rotated to perform work. Moreover, compared to the conventional structure in which a ground plate is supported by a pressing jack at the lower end of the leader, the leader is in direct contact with the ground, so it can withstand heavy objects such as auger machines and piles that load on the leader. It has sufficient durability.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a longitudinal sectional view of the main parts of the foundation construction machine, Fig. 2 is an exploded perspective view of the main parts, and Figs. 3 to 5 are elevational views of the leader. FIG. 2 is an overall side view of the machine showing its state. 3...Machine body, 5...Leader lifting device, 6...
... Lifting member, 7 ... Leader, 8 ... Intermediate connecting member, 9 ... Cylinder device for elevating the leader, 10 ...
Cylinder device for tilting the leader.

Claims (1)

[Claims for Utility Model Registration] 1. The upper end of an intermediate connecting member whose central portion is rotatably connected to the machine body is rotatably connected to a leader for supporting an elevating member of an auger machine, etc. A foundation in which a cylinder device for elevating the leader is disposed between the upper end of the connecting member and the machine body, and a cylinder device for tilting the leader is disposed between the lower end of the intermediate connecting member and the lower part of the leader. Construction machinery. 2. The foundation construction machine according to claim 1, wherein a leader lifting device is interposed between the intermediate connecting member and the leader.