JPH08291543A - Holder for PVC pipe joint of Sakui construction - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a holder for joining a PVC pipe, which does not require much labor for fastening and which holds the PVC pipe with an appropriate and stable fastening force. [Structure] A pair of gripping pieces 11a and 11b are made to face each other and are formed in a tubular shape, and a gripping tube 11 that can be opened and closed by a hinge 12 provided on one side and one on the other side of the gripping tube 11 are provided. Bearing fitting 1 provided on the gripping piece 11a of the
6, a lever 14 with a cam shaft pivotally supported by 6, and a hook 15 fitted to a cam shaft portion 14b of the lever 14 with a cam shaft,
And a locking metal fitting 17 provided on the other gripping piece 11b, which is placed on the guide pipe 2, and the hook 15 is hooked on the locking metal fitting 17 to rotate the lever 14 with the cam shaft. Thus, it is configured to be attached to the PVC pipe 3 to be inserted into the well hole by the grip cylinder 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to joining a rigid vinyl chloride pipe in a drilling well construction in which a hard vinyl chloride pipe connected and connected is inserted into the ground and a pump for pumping well water is installed in the inserted pipe. It is related to the holder.

[0002]

2. Description of the Related Art In recent years, deep wells for pumping groundwater have been constructed so that a hard vinyl chloride pipe is inserted into a drilled hole and an underwater pump is installed in the inserted hard vinyl chloride pipe for pumping. . In this case, the work for inserting the hard vinyl chloride pipe is performed by the construction method shown in FIG. That is, the well hole 1 is excavated by the excavator and the steel pipe guide pipe 2 is inserted at the same time. The guide pipe 2 has a length of about 1 m, and is inserted to a certain depth of rock mass while being joined with a screw. The excavator further excavates to a depth with a water vein. When excavated to the depth of the water vein, a rigid vinyl chloride pipe 3 of a predetermined length is added and inserted while being joined. In this case, the hard vinyl chloride pipe 3 is provided with a male threaded portion at one end and a female threaded portion corresponding to the male threaded portion at the other end, and these screws add and join to a required length. The rigid vinyl chloride pipe 3 is usually a rigid vinyl chloride pipe (hereinafter referred to as a vinyl chloride pipe) defined by JIS (Japanese Industrial Standard) K6741 or K6742 and having a nominal diameter of 100 to 300. .

In the above construction, the PVC pipe 3 is joined by inserting the holder 4 as shown in FIG. 5, for example, on the previously inserted guide pipe 2 as shown in FIG. Attach the holder 4 to the upper end of the PVC pipe 3
Is held so that it does not fall. The holder 4 includes a pair of tightening holders 5 made of a metal plate.
It is composed of a and 5b, a tightening bolt 6, and a tightening nut 7. For use as a well, a strainer is provided at the tip of the PVC pipe 3, and a seal is provided outside the PVC pipe 3 close to the water vein. The guide pipe 2 is removed, and a submersible pump is installed in the PVC pipe 3 for pumping.

[0004]

The holder 4 for pipe connection in the above-described drilling well construction has a simple structure. However, if the bolt 6 is troublesome and the tightening force is weak, the PVC pipe 3 is There is a problem that it may be dropped and that the PVC pipe 3 may be damaged if it is tightened too much. The present invention has been made to solve the above problems, and it does not take much time to tighten,
Moreover, it is an object of the present invention to provide a PVC pipe joining holder that holds the PVC pipe 3 with an appropriate and stable tightening force.

[0005]

In order to achieve the above object, a holder for joining PVC pipes according to the present invention is formed in a tubular shape with a pair of gripping pieces facing each other, and is provided with a hinge provided on one side. The grip cylinder is adapted to be opened and closed, and the other side of the grip cylinder is fitted to the cam shaft lever and the cam shaft portion of the cam shaft lever supported by a bearing fitting provided on one grip piece. A hook and a locking fitting provided on the other gripping piece are provided, the hook is placed on the guide pipe, the hook is hooked on the locking fitting, and the lever with a cam shaft is rotated, The vinyl chloride pipe to be inserted into the well hole is configured to be gripped by the gripping cylinder portion.

Further, when the gripping of the PVC pipe by the gripping cylinder is released, the tip of the hook presses the dissociation protrusion provided on the locking metal fitting to forcibly open the gripping cylinder. .

[0007]

In the PVC pipe joining holder configured as described above, the lever with the cam shaft and the hook act so that the gripping cylinder grips the PVC pipe with a constant tightening force. Also,
When the grip of the PVC pipe is released, the tip end of the hook and the disengagement projection of the locking metal member work to forcibly disengage the bite of the grip cylinder.

[0008]

【Example】

Example 1. 1 to 4 show a holder for joining a PVC pipe according to an embodiment of the present invention. In the figure, 1 is a well hole excavated by an excavator, 2 is a guide pipe, 3
Are joined PVC pipes, which are the same as those shown in the description of the conventional device. Further, the method of adding the PVC pipes and inserting them while joining them is also the same. 1A and 1B show a holder 10 for joining a PVC pipe according to the present invention, wherein FIG. 1A is a front view and FIG. 1B is a side view. In this figure, 11 is a gripping cylinder, which is formed in a cylindrical shape by a pair of gripping pieces 11a and 11b. A hinge 12 is provided on one side of the gripping cylinder 11, and the gripping piece 1
1a and 11b can be opened and closed. In addition,
The inner diameter of the grip cylinder 11 is set according to the outer dimension of the PVC pipe to be inserted. Reference numerals 13a and 13b are handles for carrying, which are fixed to the grip pieces 11a and 11b.
Reference numeral 14 is a lever with a cam shaft, and 15 is a hook, both of which are axially supported by a bearing fitting 16 fixed to the gripping piece 11a. 17 is a locking metal fitting, which is fixed to the gripping piece 11b,
The hook 15 is hooked as described later.

Inside the grip cylinder 11, as shown in FIG.
A notch 11c having a saw-tooth cross section is provided. As shown in FIG. 3, the camshaft-equipped lever 14 is provided with a camshaft 14b at a position eccentric to the shaft hole 14a. As shown in FIG. 4, the hook 15 is provided with a shaft hole 15a, and the shaft hole 15a is fitted so as to be rotatable with respect to the cam shaft 14b of the cam shaft-equipped lever 14. Accordingly, when the camshaft-equipped lever 14 is rotated about 180 degrees in the direction of arrow A from the position indicated by the solid line in FIG. 4 to the position indicated by the alternate long and short dash line, the center point of the camshaft 14b moves as indicated by dimension B as shown in the drawing. To do. That is, the hook 15 is pulled with a stroke of the dimension B by operating the lever 14 with the cam shaft. Locking fitting 17
As shown in FIG. 1, a locking projection 17a on which the hook 15 is hooked and a disengagement projection 17b that engages with the tip portion 15b of the hook 15 are provided.

When the PVC pipe joining holder 10 constructed as described above is used, as shown in FIG. 1 (b), it is placed on the previously inserted guide pipe 2 as in the conventional method. The PVC pipe joining holder 10 is placed, and the PVC pipe joining holder 10 is attached to the upper end of the inserted PVC pipe 3 to hold the PVC pipe 3 so as not to fall. As an operation for mounting, the hook 15 is attached to the locking protrusion 17a of the locking metal fitting 17.
And the cam shaft lever 14 is rotated, the grip cylinder 1
1 clamps the PVC pipe 3 and holds it so that the PVC pipe 3 does not fall. In this retained state, the PVC pipe 3 to be added next is joined. When the joining is completed, the added PVC pipe 3 is held by a hoist or a crane, and the lever 14 with the cam shaft of the PVC pipe joining holder 10 is returned to the state before the rotation. At this time, the tip portion 15b of the hook 15 has the dissociation protrusion 1
7b is pressed, so that the PVC pipe 3 is provided with the notch 1 of the gripping cylinder 11.
Even if 1c is eating, it is forcibly dissociated. When the fastening of the PVC pipe joining holder 10 is disengaged, the hoist or crane is lowered to insert the PVC pipe 3 into the ground, and the PVC pipe joining holder 10 is attached to the upper end of the PVC pipe 3 that has been inserted again to attach the next PVC pipe. Join the tubes 3. When the insertion of the PVC pipe 3 is completed, the guide pipe 2 is extracted by a hoist or a crane, and the drilling work is completed.

[0011]

Since the present invention is configured as described above, it has the following effects.

Since the holder for joining the PVC pipe can be attached to the inserted PVC pipe simply by rotating the lever with the cam shaft, the attaching work is simple and the working time can be shortened.

Since the inner diameter of the gripping cylinder is set corresponding to the PVC pipe to be inserted, the PVC pipe is gripped with a constant tightening force. Therefore, the PVC pipe may be dropped due to insufficient tightening force,
The problem that the PVC pipe is damaged due to excessive tightening force is solved.

When a holder for joining PVC pipes is attached,
Even if the gripping cylinder bites into the PVC pipe, when the lever with the cam shaft is returned, the tip of the hook presses the dissociation protrusion and the gripping cylinder is forcibly opened. Become.

[Brief description of drawings]

1 is an embodiment of the present invention, (a) is a top view,
(B) is a side view.

FIG. 2 is a cross-sectional view of a grip cylinder according to an embodiment of the present invention.

3A and 3B show a lever with a cam shaft according to an embodiment of the present invention, wherein FIG. 3A is a top view and FIG. 3B is a side view.

FIG. 4 is an explanatory view showing a relationship between a lever with a cam shaft and a hook according to the present invention.

FIG. 5 is a side view showing a conventional holder for joining PVC pipes.

FIG. 6 is a cross-sectional view for explaining drilling work.

[Explanation of symbols]

 1 Well Hole 2 Guide Pipe 3 PVC Pipe 10 Holder for Joining PVC Pipe 11 Grip Tube 12 Hinge 13 Handle 14 Cam Shaft Lever 14b Cam Shaft 15 Hook 16 Bearing Metal Fitting 17 Locking Metal Fitting

Claims (2)

[Claims] 1. A method in which a hard vinyl chloride pipe of a predetermined length is provided with threaded portions at both ends, and the hard vinyl chloride pipe is inserted into a drilled well hole through a guide pipe while joining the hard vinyl chloride pipe with the threaded portion. A pair of gripping pieces are formed in a tubular shape so as to face each other, and can be opened and closed by a hinge provided on one side, and a gripping piece provided on one gripping piece on the other side of the gripping piece. A lever with a cam shaft pivotally supported by a bearing fitting, a hook fitted on the cam shaft of the lever with a cam shaft, and a locking fitting provided on the other gripping piece, and mounted on the guide pipe. The hard vinyl chloride pipe to be inserted into the well hole is gripped by the grip cylinder by rotating the cam shaft lever by hooking the hook on the locking metal fitting. Sakusui Holder for joining PVC pipes for construction work. 2. A disengagement projection that engages with the tip of the hook is provided on the locking fitting, and when the grip of the PVC pipe by the grip cylinder is released, the tip of the hook presses the disengagement projection and the grip cylinder. The holder for joining PVC pipes for drilling wells according to claim 1, characterized in that the holder is forcibly opened.