JPH0453201B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention comprises a short sleeve and a long rod that extends through the sleeve and is provided with a sleeve expansion block having an outer diameter approximately equal to that of the sleeve at its tip. , consisting of an extension pipe that is separably joined to the rear end surface of the sleeve and surrounds the rod, and a foundation member that protrudes from a hole drilled in the ground with the long rear end of the rod and the short rear end of the extension pipe. This relates to a special extraction device that expands the diameter of the sleeve by pulling out only the rod.

(Prior art) This type of dedicated extraction device is described in Japanese Patent Application Laid-Open No. 59-21832 and uses a cylinder, but the specific structure is significantly different and it cannot be used like the device of the present invention. There is a drawback that it cannot be done. Its shortcomings will be explained in the next section.

(Problems to be Solved by the Invention) The basic member described above is basically known. However, if the above-mentioned special extraction device does not extend the cylinder rod into the hole, the length of the rod of the foundation member and the extension pipe that protrude from the hole drilled in the ground must be significantly increased. Another disadvantage is that two cylinders must be used. The present invention eliminates and solves these drawbacks.

(Means for Solving the Problems) The present invention aims to solve the problems described in the previous section, and has a plurality of tongue-like pieces 4 at the tip.
A sleeve 1 is provided with a sleeve 1, a rod 2 is provided through the sleeve and has a sleeve expansion block 12 at its tip, and an extension pipe 21 is attached to the rear end surface of the sleeve in a freely separable manner and surrounds the rod. The rear end of Rod 2 is long from the hole drilled in the ground.
The base member 1 has a short protruding rear end of the auxiliary pipe 21, and is in contact with the rear end surface of the auxiliary pipe 21, and protrudes from a pressure plate 32 provided with a hole 33 through which the rear end of the rod 2 is gently passed. A contact plate 36 is fixed to the protruding end of the frame piece 35, and a cylinder frame rod 37 protruding from a movable plate 38 that approaches and separates from the pressure plate 32 is gently passed through the contact plate 36, and the cylinder frame rod 37 is A pressure receiving plate 39 is fixed to the protruding end, a rod 41 of a cylinder 40 supported on the contact plate 36 is fixed to the pressure receiving plate 39, and the frame is placed between the nut 15 screwed onto the tip of the rod 2 and the pressure plate 32. It is characterized in that the U-shaped hole 52 of the wedge plate 51 that engages in the circular direction of the piece 35 is inserted and removed freely, and only the rod 2 is pulled out by the extension of the cylinder rod 41.

A preferred embodiment of the invention will now be described.

(Embodiment) As shown in FIG. 2, the base member a using the extraction device of the present invention is a sleeve 1 whose length is shorter than the depth of the hole y (horizontal hole) bored into the ground from the vertical hole x wall. and a rod 2 that passes through the sleeve 1, and the sleeve 1 is provided with an annular tongue-shaped piece 4 which is provided with a large number of axial notches 3 from the tip to facilitate expansion of the diameter of the tip. Those tongues 4
An inclined guide surface 5 is formed on the inner surface of the tip. rod 2
is provided with protruding rings 11 at a constant pitch over its entire length with a slight gap from the inner periphery of the sleeve, and a sleeve whose outer diameter is approximately the same as the outer diameter of the sleeve 1 at the portion protruding from the tip of the sleeve 1. The diameter expanding block 12 is fixed by welding or is formed integrally with the rod 2, and the inclined surface 13 formed at the connection part of the block 12 with the rod 2 is brought into contact with the inclined guide surface 5 of the sleeve 1.

The contact is maintained by elastically contacting one of the protruding rings 11 of the rod 2 with a ring-shaped spring 8 attached to the front of the inner protruding ring 7 of a short extension ring 6 fixed to the outer end surface of the sleeve 1 by welding or the like. Give it. The outer end of the rod 2 is provided with a male thread 14.

In the base member a described above, an extension pipe 21 having approximately the same outer diameter as the sleeve 1 is separably connected to a stepped portion formed by an extension ring on the rear end surface of the sleeve 1.
The sleeve 1, rod 2, and supplementary pipe 21 are driven or tightly inserted into the hole y with the spool diameter expansion block 12 at the beginning, and the rear end of the supplementary pipe 21 is slightly protruded from the hole y, and the rear end of the supplementary pipe 21 is inserted behind the rod 2. The end protrudes further and the nut 15 is screwed onto the male thread 14 of the rod 2.

Reference numeral 31 exemplifies the drawing device of the present invention, in which a hole 33 through which the rod 2 is gently passed is provided as shown in FIG. A guide tube 34 is provided to be fitted onto the pipe 21. A frame piece 35 having a circular cross section is protruded from the pressure plate 32 in the direction opposite to the guide cylinder 34, and a contact plate 36 that contacts the tail end of the cylinder 40 is fixed to the protruding end. A frame piece 35 is attached to the contact plate 36.
A plurality of cylinder frame rods 37 are provided on the inner periphery of the cylinder frame rod 37 and are slidably passed through the contact plate 36. It is fixed to the movable plate 38 of. A pressure receiving plate 39 is attached to the protruding end of the cylinder frame rod 37 protruding from the contact plate 36.
The tip of the cylinder rod 41 of the cylinder 40 attached to or in contact with the cylinder 6 is fixed to the pressure receiving plate 39 by screwing. 51 is inserted into the frame piece 35 through the gap formed by the frame piece 35, and is inserted into the U-shaped hole 52 on the tip surface.
A wedge plate that is fitted into the rod 2,
As shown in FIG. 3, the nut 15 is tightened against the movable plate 38 to prevent the rod from rotating.

(Function) When pulling out the rod 2, the guide tube 34 of the pulling device 31 is fitted onto the rear end protruding from the hole y of the extension pipe 21, and the pressure plate 32 is attached to the end surface of the extension pipe 21. , contact plate 36 and nut 15
Insert the wedge plate 51 between the holes in the frame piece 35 as shown in FIG.
When pressure fluid is sent into the chamber rearward from the cylinder rod 1 and the cylinder rod 41 is extended as shown in FIG. 3, the pressure receiving plate 39 is pushed out and the rod 2
On the other hand, the extension pipe 21 and the sleeve 1 are pushed by the pressure plate 32 and remain in the hole y, but the sleeve diameter expansion block 12 circumferentially surrounds the tongue-shaped piece 4 of the sleeve 1 as shown in FIG. Expand it in the direction and press it into the hole wall of hole y.

After removing the wedge plate 51 and the other extracting devices 31, insert the supplementary pipe 21 into the hole y.
At the same time as the rod 2 is pulled out, the cement milk 61 is press-fitted into the rod 2, and the rod 2 is fixed to the peripheral wall of the hole y.

(Effects) The present invention comprises a sleeve 1 having a plurality of tongue-like pieces 4 at its tip, a rod 2 that is provided through the sleeve and having a sleeve expansion block 12 at its tip, and a rod 2 that can be separated freely on the rear end surface of the sleeve. The rear end of the rod 2 is extended from the hole drilled in the ground, and the supplementary pipe 21 is connected to the rod and surrounded by the rod.
Targeting the foundation member 1 with a short protruding rear end,
This is a device for forcefully pulling out the rod 2 in order to perform a method of expanding the tip of the sleeve 1 by pulling out the required length of the sleeve expansion block 12 and biting it into the peripheral wall of the hole y. cylinder rod 4
1 expands, the pressure receiving plate 39 and the cylinder frame rod 3
7. The movable plate 38 is pushed out, and the reaction force pushes the pressure plate 32 in the direction of the hole y, leaving the extension pipe 21 and the rod 1 in the hole y, and pulling out only the rod 2, resulting in the foundation member a It has the effect of carrying out the required construction work at once, and is disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 1983-
There is no need for the rod to protrude long as in the configuration described in Publication No. 21832 in which the rod is fixed to the plate corresponding to the pressure receiving plate of the present invention, and furthermore, there is no need to protrude the rod for a long time between the plate corresponding to the pressure receiving plate of the present invention and the above-mentioned plate. There is no need to connect two cylinders and a rod, and it can be extremely usefully used as a simple-structure drawing device exclusively for basic members.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the present invention, Figs. 2 and 3 are partially cutaway side views, Fig. 4 is an enlarged front view cut along line A-A of Fig. 2, and Fig. 5 is an enlarged front view cut along line B-B of Fig. 2. It is a diagram. a → Foundation member, 1 → Sleeve, 2 → Rod, 1
1→Protruding ring, 12→Sleeve diameter expansion block, 1
5 → nut, 21 → supplementary pipe, 31 → extraction device, 32 → pressure plate, 33 → hole, 34 → guide tube, 3
5 → Frame piece, 36 → Contact plate, 37 → Cylinder frame rod, 38 → Movable plate, 39 → Pressure receiving plate, 40 → Cylinder, 41 → Cylinder rod, 51 → Wedge plate, 52 →
U-shaped hole.

Claims (1)

[Claims] 1. Sleeve 1 provided with a plurality of tongue-like pieces 4 at its tip
It consists of a rod 2 that extends through the sleeve and has a sleeve expansion block 12 at its tip, and an auxiliary pipe 21 that is attached to the rear end of the sleeve in a freely separable manner and surrounds the rod. The base member 1 has a long rear end of the rod 2 and a short rear end of the extension pipe 21 protruding from a hole drilled in the base member 1. A contact plate 36 is fixed to the protruding end of a frame piece 35 protruding from a pressure plate 32 provided with a hole 33 that is gently passed through, and a cylinder frame rod 37 protruding from a movable plate 38 that approaches and separates from the pressure plate 32 is attached to the contact plate. 36, and insert the cylinder frame rod 3
A pressure receiving plate 39 is fixed to the protruding end of the contact plate 3.
The rod 41 of the cylinder 40 supported by the rod 6 is fixed to the pressure receiving plate 39, and the wedge plate 51 is engaged in the circular direction of the frame piece 35 between the nut 15 screwed onto the tip of the rod 2 and the pressure plate 32. A pulling device characterized in that the rod 2 is inserted into the U-shaped hole 52 freely and removed, and only the rod 2 is pulled out by the extension of the cylinder rod 41.