JP2857387B1 - Pipe insertion / melting length marking jig - Google Patents

Abstract

[Problem] To stabilize the joint quality of pipe and fitting metal by making it possible to easily enter marking lines from the pipe end to secure the specified insertion and fusion length without using a ruler. And a pipe insertion / melting length marking jig capable of reducing water leakage due to poor joining. SOLUTION: A cylindrical tube 4 into which a tube end 2 of a tube 1 to be marked can be inserted, a fitting portion 13 fitted with a shaft portion of a marking pen 6 provided on an outer periphery of the tube 4. A marking pen holding portion 7 comprising a pen tip insertion hole 8 of a marking pen 6 penetrating into the inside of the cylindrical body 4; and holding means 9 for detachably holding the marking pen 6 in the marking pen holding portion 7.
And a half-ended outer cylinder 5 having one end closed and mounted on the outer surface of the cylindrical body 4. The marking position 12 can be changed by making the mounting position of the outer cylinder 5 adjustable. Insertion / melting length marking jig.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the insertion of a pipe for use in marking pipes when connecting a cross-linked polyethylene pipe or a polybutene pipe used as a pipe for supplying water or hot water to a building with fitting hardware.・ This is related to the melting length marking jig.

[0002]

2. Description of the Related Art As a joining method of a cross-linked polyethylene pipe or a polybutene pipe used for piping for water supply or hot water supply in a building such as an apartment house, and a fitting, a mechanical joining method, a heat fusion method, and an electric fusion joining method are used. Has been adopted. FIG. 2 shows the joining procedure of the mechanical joining method. The joining of pipes is performed first on the faucet side and then on the header side. At this time, first, as shown in FIG. 2 (A), the pipe 11 is cut at a right angle so as to prevent a step from being formed on the cut surface, and to prevent the pipe 11 from being cut obliquely or crushed by a sharp blade such as a PVC cutter. The inner and outer surfaces of the pipe 11 are chamfered with a chamfer, a knife or the like.

[0003] Next, as shown in FIG. 2 (B), after using a ruler and an oil-based pen or the like to insert a mark 12 for confirming insertion at a predetermined size S position from the pipe end on the entire circumference, a fitting 13 The cap nut 14 and the split ring 15 are removed from the tube, and the cap nut 14 and the split ring 15 are passed through the pipe 11 in this order, and then inserted into the sleeve 16 of the fitting 13 until the marking line 12 is hidden. After that, the split ring 15 is slid until it comes into contact with the main body of the fitting hardware 13 as shown in FIG. 2C, the cap nut 14 is manually tightened, and two spanners are hung so that the cap nut 14 is shown in FIG. 2D. As described above, the pipe 11 and the joint fitting 13 are joined by tightening the screw of the nut 17 on the body side of the joint fitting 13 until the screw becomes invisible.

[0004] On the other hand, the heat fusion and electro fusion bonding methods are shown in FIG.
After cutting and chamfering the pipe in the same manner as above, clean the joint surface with rags and alcohol,
Measure the melt length specified by the ruler from the pipe end according to the diameter of the pipe, draw a marked line at the position with an oil pen, etc., and then check the surface temperature of the heat fusion heater. First, the fitting is inserted, and then the tube is inserted to the marked line, and is heated and held for a predetermined time to melt the joint surface.

[0005] After a predetermined heating time has elapsed, the pipe and the fitting are immediately removed from the heat-sealing heater, and the molten portion (marked line length) of the pipe is inserted into the fitting by hand at a stretch, and pressed for 30 seconds or more. Keeping the condition, when the crimping is completed, cool it with a rag soaked in water for 3 minutes or more, and then, for 20 to 30 minutes, do not apply twisting, pulling, or bending force to the joint By curing, the pipe and the fitting are joined.

However, in any of the above joining methods, it is very important for quality control to insert a prescribed length, and a prescribed position is measured from a pipe end with a ruler, and an oil-based pen is placed at this position. It is necessary to write a mark for insertion confirmation on the entire circumference using this method.However, it is very difficult and troublesome to apply a flat ruler on this resin pipe and accurately mark it along the circumference. In many cases, they rely on the visual inspection of the operator or on the can, and this is a major cause of poor connection and water leakage.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a marking line for securing a specified insertion / fusion length from a pipe end at the time of joining a pipe and a fitting, without using a ruler. It is an object of the present invention to provide a jig for marking and inserting a tube into a tube, which can be easily carried out by using an oil-based pen or the like. Another object of the present invention is to stabilize the joint quality between a pipe and a fitting by making it possible to easily carry out securing of a specified insertion / melting length without relying on a worker's visual observation and a can. Another object of the present invention is to provide a pipe insertion / melting length marking jig capable of reducing water leakage due to poor joining.

[0008]

In order to solve the above-mentioned problems, a jig for marking and inserting a pipe into a pipe according to the present invention comprises a cylinder into which a pipe end of a resin pipe for water / hot water supply to be marked can be inserted. A cylindrical pen, a fitting part for fitting a shaft part of a marking pen provided on the outer periphery of the cylindrical body, and a marking pen holding part comprising a pen point insertion hole of a marking pen penetrating inside the cylindrical body Holding means for detachably holding the marking pen to the marking pen holding portion; and a half-split outer cylinder having one end closed and mounted on the outer surface of the cylindrical body. The marking position can be changed by adjusting the position.The marking jig is inserted into the end of the pipe to be marked, and the marking jig is rotated while the pipe is fixed. Do Accordingly, it is possible to fill the indicia easily by all around the marking pen insertion and melting the length position of the prescribed than the tube end.

Further, in the pipe insertion / melting length marking jig according to the present invention, in the pipe insertion / melting length marking jig described above, the holding means may include a screw projecting into the fitting portion. It is characterized by comprising a screw having a shaft, and the holding means for holding the marking pen on the marking pen holding part is made with a screw, so it can be especially tightened and loosened by hand A simple thumbscrew or the like can be used, and when the marking pen is replaced, it can be easily rotated by hand without using a tool or the like. Further, the outer cylinder indicating the insertion / fused length position to be marked depending on the pipe diameter can be easily slid and fixed by the thumb screw.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.
It will be described based on. FIG. 1 is a partial cross-sectional side view showing a configuration of a jig for insertion and fusion length marking of a pipe according to an embodiment of the present invention.

In the figure, 1 is a pipe to be marked,
Reference numeral 2 denotes the end of the tube, and reference numeral 3 denotes a jig for marking and inserting the tube into the tube. The tube insertion / melting length marking jig 3 includes a cylinder 4 having both ends opened to which a marking pen described later is attached, and an insertion / melting length L of the tube 1 attached to the cylinder 4. The outer tube 5 has a closed end at one end thereof, and the tube 1 is held and marked on the cylindrical body 4 and the outer tube 5. Note that the outer cylinder 5 is formed in a half-split shape with a part cut out over its entire length, so that the pipe end 2 inserted into the marking jig 3 can be confirmed from the outside.

A marking pen holding portion 7 for inserting and holding a marking pen 6 such as an oil pen is provided on the outer periphery of the cylindrical body 4 and a scale 10 for determining an insertion / melting length L of the tube 1 is provided. It is graduated. The marking pen holding portion 7 has a fitting portion 13 for fitting a shaft portion of a marking pen provided on the outer periphery of the cylinder 4 and a pen tip insertion hole 8 of the marking pen 6 penetrating into the cylinder 4. In addition to the above, a thumbscrew 9 as a holding means for holding the marking pen 6 inserted in the marking pen holding portion 7 on the marking pen holding portion 7 is provided on the upper side of the fitting portion 13.

In the vicinity of the other end of the outer cylinder 5, a thumb screw 11 as a means for fixing the outer cylinder 5 mounted on the cylinder 4 to the cylinder 4 is provided. Outer cylinder 5 in position
The other end of the tube 1 and tighten the thumbscrew 11 to fix the outer tube 5 to the tube 4 so that the tube 1 can be inserted and melted length L
Can be determined to any length.

The jig 3 for inserting and melting the length of the tube is made of an integrally molded product made of aluminum or the like because of its light weight, good handleability, and excellent strength. Is preferred. Also, there is no need to prepare a jig 3 for marking / melting the length of a tube manufactured according to a normally used diameter of the tube 1.
It is possible to easily cope with the change of the type by sliding the position of the outer cylinder 5.

When the marking line 12 is to be marked on the pipes 1 to be joined by using the jig 3 for inserting and melting lengths of the pipes described above, the pipes are first selected in accordance with the diameter of the pipes 1. A marking pen 6 such as a commercially available oil-based pen is inserted into the marking pen holding portion 7 of the marking jig 3, which is tightened and held by the thumb screw 9, and the outer cylinder 5 is adjusted to a desired insertion / fusion length L. Scale 10 of cylinder 4
Then, the cylindrical body 4 of the marking jig 3 is inserted into the pipe end 2 of the pipe 1 to be marked until the closed side end of the outer cylinder 5 comes into contact with the pipe end 2 of the pipe 1 to be marked.

In this state, by rotating the marking jig 3 with the tube 1 fixed, the insertion confirmation is performed over the entire circumference from the tube end 2 of the tube 1 to a position corresponding to the specified insertion / fusion length L. Mark line 12 can be entered. In addition, if the marking pen 6 is set so that the pen tip of the marking pen 6 is correctly in contact with the surface of the tube 1, the marking jig 3 is usually rotated by one rotation to obtain a beautiful mark over the entire circumference. The line 12 can be entered, and then the marking jig 3 is removed from the pipe end 2 to
The marking work of the marking line 12 can be easily performed.

Therefore, at the time of joining the pipe 1 and the fitting metal, the marked line 12 for securing the specified insertion / melting length L
Inserting the marking jig 3 without using a ruler,
With a simple operation called rotation, it is possible to accurately mark a desired position, and it is possible to easily and accurately carry out securing of a specified insertion / melting length L without relying on a worker's eyes or a can. By doing so, the joining quality between the pipe 1 and the fitting can be stabilized, and water leakage due to poor joining can be reduced.

Further, even when the marking pen 6 is worn out and needs to be replaced, the marking pen 6 can be easily replaced without using a tool or the like by turning the thumb screw 9 by hand. Along with
It is possible to easily cope with the difference in the marking position depending on the pipe diameter by sliding the outer cylinder 5.

[0019]

As described above, according to the pipe insertion / melting length marking jig according to the present invention, a mark for securing the pipe insertion / melting length, which is a check item at the time of piping construction, is provided. By using this marking jig, it is possible to easily perform the line marking operation without using a ruler, so that one of the cumbersome operations can be improved. In addition, it is possible to eliminate the dependence of the worker on the visual inspection and the can, stabilize the joining quality of the pipe and the fitting, and eliminate the cause of water leakage due to the shortage of the pipe insertion / melting length.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a configuration of a jig for inserting and melting length of a pipe according to an embodiment of the present invention.

FIG. 2 is a process analysis diagram showing a joining procedure of a conventional mechanical joining method for joining a pipe and a fitting.

FIG. 3 is a process chart showing a joining procedure of a conventional heat welding and electrofusion joining method for joining a pipe and a fitting.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Pipe, 2 ... Pipe end, 3 ... Marking jig, 4 ... Cylindrical body, 5
... outer cylinder, 6 ... marking pen, 7 ... marking pen holder, 8 ... pen point insertion hole, 9 ... thumb screw, 10 ... scale, 11
... Thumbscrews, 12 ... Marked lines, 13 ... Fits, L ... Regulated insertion / melting length

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B25H 7/04 F16L 11/12 F16L 47/02

Claims (2)

(57) [Claims] 1. A cylindrical body into which a pipe end of a resin pipe for water / hot water supply to be marked can be inserted, and a fitting part for fitting a shaft part of a marking pen provided on an outer periphery of the cylindrical body. A marking pen holding portion comprising a pen tip insertion hole of a marking pen penetrating into the inside of the cylindrical body; holding means for detachably holding the marking pen in the marking pen holding portion; A half-split outer cylinder mounted on the outer surface of the body, wherein the mounting position of the outer cylinder is adjustable so that the marking position can be changed; Marking jig. 2. The jig according to claim 1, wherein said holding means is constituted by a screw having a screw shaft projecting into said fitting portion. .