JPH0738458Y2 - Mouth casing mechanism - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a mouth casing mechanism used when constructing piles or burying existing piles in foundation work such as construction work and civil engineering work.

[Prior Art] Various construction methods such as a method of pouring concrete into an excavation hole to construct a pile and a method of burying an existing pile in the excavation hole have been performed as a foundation work for construction work and civil engineering work. And
In each of these construction methods, in order to prevent the excavated hole from collapsing from the ground surface, a cylindrical casing is often fitted at the entrance of the hole, that is, at the mouth of the hole. Referring to FIG. 5, an example thereof will be described. 30 is a pile burying device,
A drill head 31 including a motor 32, a swivel 33, and the like can be moved up and down along a leader 35 by a feeding device 36. A chuck 34 of the drill head 31 holds a drilling rod 37 or a pile to drill a hole. It is possible to bury and bury piles.

Therefore, first, as shown in FIG.
Drill and give 37 rotation and propulsion. At this time, water is supplied from the water supply source through the swivel 33, and the tip portion of the drill rod 37 is
Excavate while ejecting from 38 appropriate places. After drilling to a predetermined depth (planned depth) as shown in FIG. 7B, the water supply is stopped. Next, as shown in FIG. 6C, the supply of cement milk is switched to, the root of the excavating rod 37 is sprayed from the proper position of the tip portion 38, and the root is solidified, and the excavating rod 37 is pulled up. Therefore, this time, the excavation rod 37 is removed, the pile is replaced with a pile, and the pile is inserted and buried in the drilled hole, thus ending the process.

In the construction method as described above, the casing 39 (previously) for preventing collapse is provided at the hole opening (entrance) of the ground to be drilled.
Is often fitted. Conventionally, the fitting of the casing 39 is performed by first digging the soil of a portion of the surface of the casing, which has a large amount of debris for the surface of the casing, with an auger to form a hole, and inserting the casing 39 into the hole. Before digging, the casing 39 was forcibly driven with a vibro hammer, and then the auger was used to dig up the soil with a large amount of debris on the surface to form a hole. The conventional casing 39 is simply a hollow cylinder.

A conventional pile burying device is shown in FIG.
Crane 40 is usually provided at the same time, as seen in the -185917 publication. Referring to FIG. 6, 41 is a lower traveling body, 42 is a skit provided on the lower traveling body 41, and the skit 42 has an outrigger.
43 is provided. 44 is a leader standing on the skit 42, 45 is a drill head including a rod chuck 46, and is vertically moved along the leader 44 by a feeding device 48. Incidentally, 49 is a rod holder and 50 is a pile holder.

In order to excavate a hole for burying a pile using the device of FIG. 6, first attach an auger to the rod chuck 46,
With this auger, soil was dug up to the surface of the ground to form a hole, and a hollow cylindrical casing was simply lifted by a crane 40 and fitted into the hole formed by the auger.

[Problems to be solved by the invention] However, if the soil is first dug up to the ground surface with an auger to form a hole and the casing is fitted into the hole to install the hole, the hole forming process and the casing There is a drawback that the installation process is a two-step process and the work efficiency is poor.

In addition, since the conventional casing is simply a hollow cylinder, the casing must be installed only by hanging it with a crane, and when the casing is difficult to enter into the hole, it has to be pushed with another hammer. there were.

Therefore, the present invention aims to provide a mouth casing mechanism capable of fitting the casing into a predetermined position in one step, improving workability, and further capable of fitting while rotating the casing. Furthermore, by using the device shown in FIG. 6 capable of lowering while rotating the rod or the pile, the soil disturbance by the bit and the fitting of the casing can be performed in one step, and An object of the present invention is to provide a mouth casing mechanism that can be installed at a predetermined position while rotating the casing.

[Means for Solving the Problems] According to the present invention, an elongated upper slide hole and a lower slide hole are formed in a horizontal direction on an inner peripheral surface of a hollow cylindrical casing main body for achieving the above-mentioned object. A guide groove is provided vertically between the upper slide hole, a guide groove is provided vertically between the upper slide hole and the lower slide hole, a mouth casing having the groove is provided, and a screw is screwed at the tip side. A ring-shaped guide ring whose outer diameter is the inner diameter of the mouth casing is coaxially provided at the middle and the lower end of the rod, and the outer peripheral surface of the guide ring at the lower end is along the guide groove and the slide hole of the mouth casing. A guider for guiding is provided so as to project, and a casing drive rod having a bit is provided at an appropriate position on the lower surface of the guide ring.

[Operation] The casing drive rod can be detachably attached to the mouth casing while guiding the guide element of the guide ring along the guide groove and the slide hole on the inner peripheral surface of the mouth casing.

Further, in a state in which the guide of the casing drive rod is located in the lower slide hole of the mouth casing and the casing drive rod and the mouth casing are integrated, the mouth casing is firmly guided by the two guide rings of the casing drive rod, The casing drive rod and the mouth casing are reliably and stably integrated.

Also, the upper slide hole of the mouth casing has a guide rod of the casing drive rod located at the position of the upper slide hole when the predetermined work is completed and the mouth casing is collected, and is integrated with the mouth casing drive rod. It plays the role of being able to raise and pull up.

[Embodiment] An embodiment of the present invention will be described in detail below with reference to the drawings.
FIG. 1 is a drawing showing a mouth casing 1 forming a part of the mouth casing mechanism of the present invention, FIG. 1 (A) is a plan view thereof, and FIG. 1 (B) is the same as FIG. 1 (A). A-
It is a figure showing the section by the A line. In FIG. 1,
Reference numeral 2 is a hollow cylindrical casing body, and guide grooves 3 and 4 and upper and lower slide holes 5 and 6 are provided so as to face each other on the inner peripheral surface thereof. The guide groove 3 is formed in a vertical direction from the upper end, and an upper slide hole 5 connected to the guide groove 3 is formed as a horizontally elongated slot. The guide groove 4 is vertically provided from the upper slide hole 5,
It is connected to the lower slide hole 6. The lower slide hole 6 is an elongated hole that is elongated in the horizontal direction and has a large diameter portion 6a at the end.

FIG. 2 shows a casing drive rod 11 which constitutes the mouth casing mechanism of the present invention together with the mouth casing 1 described above.
The same figure (A) is a perspective view thereof, and the same figure (B) is a view showing a central longitudinal section thereof. In FIG. 2,
The casing drive rod 11 is used to embed the mouth casing 1 in the mouth of the ground to be drilled. Reference numeral 12 is a rod, and in order to chuck the rod 12 using the device shown in FIG. 6, it is preferable that a screw 13 for connection is screwed on the upper end of the rod 12. Ring-shaped guide rings 14 and 15 are coaxially provided at the middle and lower ends of the rod 12 by connecting members 14a and 15a, for example. The outer diameters of the guide rings 14 and 15 are made substantially equal to the inner diameter of the mouth casing main body 2 so that the guide rings 14 and 15 can be closely inserted into the mouth casing 1 shown in FIG.
Further, on the outer peripheral surface of the guide ring 15 at the lower end, guide elements 16, 16 are provided at symmetrical positions so as to project. The guider 16 slides along the guide grooves 3 and 4 and the slide holes 5 and 6 of the mouth casing 1 to guide the casing drive rod 11 into the mouth casing 1 or to be located at the slide hole. It also supports the casing. Further, a bit 17 is provided at an appropriate position on the lower surface of the guide ring 15 at the lower end. This bit 17 is, for example, a connecting member 15a of the guide ring 15.
It is fixed to the lower end of the above, and is intended to agitate the ground by rotating and lowering the rod 12 to facilitate the sinking of the mouth casing 1.

The mouth casing 1 and the casing drive rod
Casing drive rod to integrate with 11
The guide element 16 of the guide ring 15 is guided from the upper end of the mouth casing 1 along the guide groove 3 on the inner peripheral surface of the mouth casing 1, and the upper slide hole 5 of the mouth casing 1 is guided.
Insert up to. Here, since the guide 16 abuts on the upper slide hole 5, the casing drive rod 11 is rotated in the horizontal direction and slid along the upper slide hole 5 to bring the guide 16 to the position of the guide groove 4. Therefore, the guide element 16 is guided along the guide groove 4, and the casing drive rod 11 is deeply fitted into the mouth casing 1. Then, since the guide 16 abuts the lower slide hole 6 this time, the casing drive rod 11 is further rotated in the horizontal direction to position the guide 16 on the large-diameter portion 6a of the lower slide hole 6. FIG. 3 shows a sectional view of such a state. In FIG. 3, the mouth casing 1 and the casing drive rod 11 are integrated with each other, and when the rod 12 of the casing drive rod 11 is rotated and settled, the mouth casing 1 can also be rotated while being submerged. It has become.

Next, an actual method of sinking the mouth casing 1 will be described with reference to FIG. First, in a state where the mouth casing 1 and the casing drive rod 11 shown in FIG. 3 are integrated,
As shown in Fig. 4 (A), the rod 12 portion of the casing drive rod 11 is lifted by a crane 40, and as shown in Fig. 4 (B), a pile burying machine 52 (this pile burying machine) is used. Shows the whole apparatus shown in FIG. 4, which has the same equipment as the pile burying machine 52 shown in FIG. 6, for example.
The mouth casing 1 and the casing drive rod 11 which are integrated on the ground at the position where the hole is to be drilled are positioned in alignment with the axis of the drill head 45 including the rod chuck 46.

In this state, as shown in FIG. 4 (C), the feeding device 48 is operated to lower the drill head 45 including the rod chuck 46 and the rod clamp 47, and the drill head 45 is rotated to rotate the casing drive rod 11 Rod 12 of the casing drive rod 11 is rotated and lowered by unifying the rod 12 of the casing drive rod 11 with the drill head 45, and as shown in FIG. The casing 1 is rotated and lowered while disturbing the ground, and the casing 1 is submerged in the ground. When the mouth casing 1 is sunk to a predetermined depth, the drill head 45 is reversely rotated to position the guide element 16 of the casing drive rod 11 at the position of the guide groove 4 of the mouth casing 1, and the casing drive rod 11 is moved at this position. Pull up,
When the position of the upper slide hole 5 of the mouth casing 1 is reached, the drill head 45 is rotated in the reverse direction to position the guide element 16 of the casing drive rod 11 at the position of the guide groove 3 of the mouth casing 1, and at this position the casing drive rod 11 The casing casing 1 and casing drive rod 11
And the casing drive rod 11 is pulled upward, and the casing drive rod is removed from the drill head 45.
11 is separated, and as shown in Fig. 4 (E), the crane 40
The casing drive rod 11 is moved to a predetermined storage location.

Although not shown in the following steps, a rod having a device for ejecting high-pressure water from the tip portion (for example, a device shown as 38 in FIG. 5) was attached to the drill head 45, and the mouth casing 1 was installed near the surface of the earth. As it is, a hole is excavated further deeply, cement milk is jetted from the tip of the rod at a predetermined depth, and then the rod is pulled up and a pile is sunk.

When the burying work of the pile is completed, the mouth casing 1 is pulled out. In this withdrawing work step, the casing drive rod 11 is attached to the drill head 45, the casing drive rod 11 is lowered, and the guide 16 of the casing drive rod 11 is positioned at the position of the guide groove 3 of the mouth casing 1, Then, the drill head 45 is rotated to position the guide element 16 of the casing drive rod 11 at the end point of the upper slide of the mouth casing 1. When the casing drive rod 11 is raised while rotating in this state, the mouth casing 1 is pulled out and collected.

It should be noted that although the above embodiments have been described with respect to a specific pile burying device, the mouth casing mechanism of the present invention can of course be used for other devices.

[Advantage of the Invention] As described above, according to the present invention, the mouth casing can be buried in one step without excavating a hole with an auger in advance,
Moreover, since the rotary digging is also possible, the digging work can be carried out smoothly and the working efficiency is greatly improved.

Further, the bottom casing can be sunk in the lower slide hole, and the bottom casing can be inscribed in the upper guide ring of the casing drive rod, so that the bottom casing can be stably sunk.

In addition, when a predetermined work such as burying a pile is completed and the mouth casing is collected, the work can be performed in the upper slide hole of the mouth casing, and the work can be performed without being influenced by the presence or absence of sediment in the mouth casing. Work becomes easy.

If a screw is provided on the upper portion of the rod of the casing drive rod, the work of attaching various devices to the drill head will be smooth, and the work of exchanging with various rods will be facilitated. A mouth casing mechanism can be applied.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention, FIG. 1 (A) is a plan view of a mouth casing, FIG. 1 (B) is a sectional view taken along line AA of FIG. 1 (A), 2 (A) is a perspective view of the casing drive rod, FIG. 2 (B) is a central vertical sectional view of the casing drive rod, and FIG. 3 is a central vertical sectional view of the state in which the mouth casing and the casing drive rod are set and integrated. Four
(A) to (E) are explanatory views showing the step of burying the mouth casing, FIGS. 5 (A) to (C) are explanatory views showing a conventional pile burying method, and FIG. 6 is an example of a pile burying device. It is a schematic diagram showing. 1 ... Mouth casing, 2 ... Mouth casing body, 3,
4 ... Guide groove, 5 ... Upper slide hole, 6 ... Lower slide hole, 11 ... Casing drive rod, 12 ... Rod, 13 ... Screw, 14,15 ... Guide ring, 16 ... Guider , 17 ... a bit.

Claims (1)

[Scope of utility model registration request] 1. An inner peripheral surface of a hollow cylindrical casing main body is provided with horizontally slender upper slide holes and lower slide holes, and a guide groove is vertically provided between the upper end and the upper slide hole. A guide groove is vertically provided between the upper slide hole and the lower slide hole, and the inside diameter of the mouth casing is set to the outside diameter at the middle and the lower end of the rod screwed on the tip side. A ring-shaped guide ring is coaxially provided, and a guider for guiding along the guide groove and the slide hole of the mouth casing is provided on the outer peripheral surface of the lower guide ring, and the lower surface of the guide ring is A mouth casing mechanism consisting of a casing drive rod with a bit in place.