JPS593831Y2 - pipe marking jig - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a jig for marking a predetermined insertion dimension position on the outer circumference of a pipe in advance so that the insertion length of the pipe into a packing type joint can be confirmed.

For backing type fittings, it is important to insert and connect the pipe according to the specified insertion dimensions in order to ensure the performance of the fitting.In order to perform the connection work while checking the insertion dimensions, it is necessary to It is necessary to mark the insertion dimension position.

Conventionally, this work involved taking a predetermined dimension from the end of the pipe using a scale or the like and drawing a line using marker ink or the like, but this had the disadvantage of being time-consuming and inaccurate.

The present invention attempts to eliminate these drawbacks and enables accurate and efficient marking operations.

FIG. 1 shows one of the embodiments of the present invention, and is of a type in which lines are drawn with marker ink.

Reference numeral 1 denotes a main body, which consists of a roller support part 2, a bundle part 3, and a support part 5 of a case 4 of marker ink.

6 is the pipe to be marked, 7, 8.
8' is a roller worn with a pipe.

A marker ink 9 and coil springs 10, 10' are inserted into a cylindrical case 4, and a lid 11 is screwed onto one end of the case 4.

The case 4 is attached to the support portion 5 using a square nut 13 screwed into the male thread 12 at the end of the case 4.

14, 15, and 15' are roller shafts, and 16 is a hexagonal nut.

The support portion 2 of the roller 7 is shaped like a leaf spring so that each roller can always contact the inner and outer surfaces of the pipe in accordance with various pipe diameters.

FIG. 2 is a cross section taken along line A-A in FIG. 1, and shows the rollers 7.8.
8' shows the attachment part of the vibro.

The roller 7 is in contact with the pipe inner surface 17, and the roller 8.8'
is in contact with the pipe outer surface 18.

As shown in the figure, in order to bring three rollers 7.8.8' into contact with the inner and outer surfaces of the pipe at the same time, the rollers 7 are rollers 8.
Position it on the perpendicular bisector of the straight line connecting the centers of 8'.

The support portion 5 has a concave cross section as shown in FIG. 2, and is shaped to prevent the square nut 13 from rotating together.

FIG. 3 shows an example of the side shape of the support portion 5 of the main body 1,
This is an example of application to a joint in which insertion dimensions differ depending on various pipe diameters, and a scale line 20 for pipe insertion dimensions is engraved next to an elongated hole 19 provided in the center.

Next, the procedure for using the marking jig having the above structure will be explained with reference to FIGS. 1 to 3.

First, loosen the case 4 and square nut 13,
Using the scale line 20 of the support part 4, adjust the three dimensions shown in FIG.
3 and fix it to the support part 5.

Next, a part of the end wall of the pipe is inserted between the rollers 7 and 8, 8', the pipe tip 21 is brought into contact with the pipe abutting part 22 of the main body 1, and the tip 23 of the marker ink 9 is applied with an appropriate force. Adjust the fit of the lid 11 into the case 4 so that it hits the outer surface of the bite.

Finally, hold the bundle part 3 of the main body 1 in your hand and rotate the entire jig along the circumference of the pipe, being careful not to let the pipe tip 21 separate from the pipe abutting part 22. Complete the line drawing with magic ink.

FIG. 4 shows another embodiment of the present invention, in which lines are drawn with a scribing needle.

A marking needle 24 is inserted inside the case 4, and a coil spring 10 is inserted in the same way as the magic ink type (Fig. 1).
The pressing force against the pipe is adjusted by the lid 11.

In this example, the support part 2 of the roller 7 is connected to the main body 1 by a bolt 25.

Note that it is also possible to use two scribing needles and draw two lines on the outer circumference of the pipe at the same time.

Figure 5 shows a roller 2 with a blade on the outer periphery instead of a scribing needle.
This is an example using 6.

In this example, the support portion 27 of the pipe outer peripheral side rollers 8, 8'
is in the shape of a leaf spring, and is attached to the main body 1 with a bolt 28.

In addition, a spindle 29 for supporting the roller 26 is inserted into the case 4, and a knob 30 at the tip of this spindle 29 is used to pull the roller 26 in when placing the vibro between the rollers 7, 8, and 8. It is used to keep the information.

The marking jig according to the present invention makes it possible to take accurate dimensions and improve the efficiency of marking work, and as shown in the above embodiment, it has a leaf spring-shaped roller support part and a coil spring inside the case, so that it can be used in various ways. It has the feature that it can be applied to pipes with an outer diameter and wall thickness of .

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view showing an embodiment of the pipe marking jig according to the present invention, Fig. 2 is a sectional view taken along line A-A in Fig. 1, Fig. 3 is a partial side view of the main body, and Figs. Each figure is a longitudinal sectional view showing another embodiment of the pipe marking jig according to the present invention. 1: Main body, 4: Case, 7, 8.8': Roller, 9
: Magic ink, 10.10': Coil spring, 11:
Lid, 24: scribing needle.

Claims (1)

[Scope of utility model registration request] Three rollers with axes parallel to each other are used to attach a part of the pipe wall at the end of the pipe, and a spring is installed inside to hold a scribing needle or the like in a direction perpendicular to the axis of the rollers. 1. A manual pipe marking jig comprising a cylindrical case, a roller, a support portion for each of the cylindrical cases, and a bundle portion.