JPH0410316Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention provides a
This invention relates to a driving force transmission adapter for connecting a casing, a boring rod, and an anchor rod.

(Prior art, its problems, and technical fields) An example of ground reinforcement work will be explained based on Fig. 3. First, as shown in Fig. After penetrating the ground 2, as shown in Figure b, the ground 2 was bored with the boring rod 3 inserted into the casing 1, and then the boring rod 3 was pulled out from the hole 4 as shown in Figure c. After that, as shown in Figure d,
An anchor rod 5 is inserted into the hole 4, and grout 6 is poured into the hole 4 from the tip of the anchor rod 5, so that the ground 2 is reinforced with the anchor rod 5 and the grout 6, as shown in Figure e. It is.

The casing 1, boring rod 3, and anchor rod 5 are operated by a drive device that generates rotational force and impact force of the ground boring machine. Because of the difference, they cannot be connected directly to the drive shaft of the drive device.

Therefore, in the past, separate dedicated adapters were used for connection, but there was a problem in that it took time and effort to replace each dedicated adapter, reducing work efficiency.

(Purpose of the invention) In view of the above-mentioned conventional problems, an object of the present invention is to provide a driving force transmission adapter that does not require replacement.

(Means for Solving the Problems) In order to solve the above conventional problems, the present invention provides a driving device 12 that generates rotational force and striking force.
The adapter 13 is removably connected to the drive shaft 12a of the adapter body 15, and the front part of the adapter body 15 includes:
A male threaded portion 17 for connecting a casing, a male threaded portion 18 for connecting a boring rod, and a threaded hole 19 for connecting an anchor rod are provided sequentially and concentrically from the outer circumferential side to the axial center side, and the adapter body 15
A swivel joint part 21 is arranged on the outer periphery of the
A structure is adopted in which the joint portion 21 is communicated with the anchor rod connecting threaded hole 19 via a communication path 26.

(Example) Fig. 2 shows a ground boring machine 9 supported by a bulltozer 8 so as to be freely downwardly depressed, and the rotational force and impact are applied from the center to the rear of a slide base 11 that is slidably disposed on a slide frame 10. A known drive device 12 is provided for generating a force, and
A driving force transmission adapter 13, which is an embodiment of the present invention, is disposed at the front of the slide base 11.

The adapter 13 has a cylindrical adapter body 15, as shown in FIG.
Rear screw hole 1 formed in the axial direction on the rear end surface of 5
6 is removably screwed onto the drive shaft 12a of the drive device 12. Therefore, the adapter main body 15 is rotated by the drive device 12 and is also caused to vibrate back and forth in an impactful manner.

The front part of the adapter body 15 has a large diameter part 15.
a and a small diameter portion 15b are formed concentrically in the front and back via a stepped portion 14, and a male threaded portion 17 for casing connection is screwed onto the outer peripheral surface of the large diameter portion 15a, and a male screw portion 17 is screwed onto the outer peripheral surface of the small diameter portion 15b. A male threaded portion 18 for connecting the boring rod is screwed, and a small diameter portion 15 is provided.
A threaded hole 19 for anchor rod connection is bored in the axial direction on the end face of b. Then, the casing 1, the boring rod 3, and the anchor rod 5 are sequentially screwed into each of the male threaded portions 17, 18 and the threaded hole 19 according to the work procedure described at the beginning.

Here, since a female threaded portion is formed at one end of the boring rod 3 to be screwed into the male threaded portion 18, a male threaded portion having the same diameter as the male threaded portion 18 is formed at the other end. Then, the boring rod 3 can be added by sequentially screwing the female thread and the male thread part together,
Further, in this case, since the outer circumferential surfaces of the joints between the boring rods 3 are flush with each other, there is less resistance from the hole wall during the drilling operation, and the drilling operation can be carried out smoothly.

A ring-shaped swivel joint portion 21 for injecting cooling water, grout, etc. is attached to the outer periphery of the central portion of the adapter body 15 so as to be relatively rotatable via a watertight ring 24.
A supply hose 25 for cooling water, grout, etc. is fixedly connected to the screw hole 19 through a communication path 26 formed in the adapter body 15.
Even when the adapter body 15 is in the middle of rotation, the adapter body 15 is always connected and connected.

The order of use is the same as in the conventional example, in which the casing 1 screwed to the male threaded portion 17 of the adapter 13 is penetrated into the ground by the drive device 12, and then the boring rod screwed to the male threaded portion 18 of the adapter 13 is inserted into the ground. The drilling rod 3 receives the driving force of the drive device 12 to bore the ground, and at this time, if necessary, the boring rod 3 is moved from the swivel joint part 21.
Supply cooling water to the tip of the adapter 13.
An anchor rod screwed into the screw hole 19 of the anchor rod 5 may be inserted into the borehole, and grout may be poured into the borehole from the tip of the anchor rod 5.
As the grout hardens, the ground will be strengthened in cooperation with the anchor rod.

(Effects of the invention) According to the invention, since the adapter body connected to the drive shaft is provided with a male threaded part for connecting the casing and the boring rod, and a threaded hole for connecting the anchor rod, the casing, the boring rod Also, there is no need to replace the adapter for connecting the anchor rod to the drive shaft, and work efficiency can be greatly improved.

Furthermore, since the adapter body is provided with a swivel joint, there is no need to provide a swivel joint on the drive shaft device side, and the structure and operation are simpler.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of a drive shaft force transmission adapter which is an embodiment of the present invention, Fig. 2 is a side view of a ground drilling machine using the above adapter and a bulltozer supporting it, and Figs. 3 a to e. is a schematic side view showing the ground reinforcement procedure. 1... Casing, 3... Boring rod,
5... Anchor rod, 6... Grout, 9...
Ground drilling machine, 12... Drive device, 12a... Drive shaft, 13... Adapter, 15... Adapter body,
17... Male threaded part for casing connection, 18... Male threaded part for boring rod connection, 19... Threaded hole for anchor rod connection, 21... Swivel joint part, 26... Communication path.

Claims (1)

[Scope of utility model registration request] An adapter that is removably connected to a drive shaft of a drive device that generates rotational force and impact force,
A male threaded portion for connecting a casing, a male threaded portion for connecting a boring rod, and a threaded hole for connecting an anchor rod are provided in the front part of the adapter body sequentially and concentrically from the outer periphery side to the axial center side, and the outer periphery of the adapter body A driving force transmission adapter for a ground drilling machine, comprising: a swivel joint portion disposed in the anchor rod connecting screw hole; and the joint portion is communicated with the anchor rod connecting threaded hole via a communication path.