JP2514709Y2 - Pipe vendor - Google Patents

Description

[Detailed description of the device]

[0001]

FIELD OF THE INVENTION The present invention relates to a pipe bender.

[0002]

2. Description of the Related Art For pipe vendors as hand-held tools,
Conventionally, there is one as shown in the side view of FIG.

The pipe bender shown in the figure comprises a main body 21 and a movable lever 22. A fixed lever 23 is integrally formed at one end of the main body 21, and a U-shaped locking hook 24 is integrally formed at the other end at the other end thereof. Is provided as a disc portion 25. A scale 25a indicating the bending angle of the pipe P is attached to the side surface of the disk portion 25. Movable lever 2
2 is swingably attached to the main body 21 via a swing piece 26, and the movable lever 22 is provided with a pressing portion 27 for pressing the pipe P against the disk portion 25.

In use, the pipe P is locked on the inside of the locking hook 24, and the vicinity thereof is put into a groove on the outer circumference of the disk portion 25, and the pressing portion 27 of the movable side lever 22 is positioned on the opposite side. Then, the pressing portion 27 and the disc portion 25 sandwich the pipe P. Then, in that state, the movable side lever 22 is pulled toward the fixed side lever 23,
The pressing portion 27 is rotated around the disk portion 25. with this,
The pipe P is curved along the disc portion 25.

[0005]

By the way, in the bending process of a pipe, as shown in FIG. 5, a bent portion may be formed at each of a plurality of portions of one pipe to bend the pipe three-dimensionally. In such a bending process, it is necessary to accurately perform processing so that the angle between the one bent portion and the other bent portion has a predetermined value.

As for the angle, referring to FIG. 5, assuming that two bent portions form three portions Pa, Pb, and Pc in the pipe, the angle between the Pa portion at one end and the Pc portion at the other end. Is an angle θ between them. In other words, a plane including the central Pb portion and the one end Pc portion (here, YZ
It is an angle θ formed by another Pa portion with respect to the plane.

When performing the above-described three-dimensional bending work by a conventional pipe bender, one bending work, for example, between Pa and Pb is formed in the first bending work, and then the center bend is made. Pb part is locked to the locking hook 24, and P
After determining the angle of the a portion, the other Pc portion is made by the next bending process.

However, in the conventional pipe vendor,
Locking side part of pipe to be bent (Pa and Pb parts)
Since there is no structure for setting the angle and the direction, it is impossible to accurately determine such an angle, and three-dimensional bending is extremely difficult.

The present invention addresses such a conventional problem, and an object thereof is to enable accurate three-dimensional bending of a pipe.

[0010]

In order to achieve the above-mentioned object, the present invention comprises a main body having a fixed side lever and a movable side lever swingably attached to the main body.
The main body is provided with a locking hook for the pipe and a disc portion as a receiving seat for the pipe, and the movable lever is provided with a pressing portion for pressing the pipe onto the disc portion. It has a support rod, an angle scale plate, and an angle indicator.The support rod is attached to the main body and extends to the side opposite to the disc portion.The angle scale plate has a pipe at its center. It is detachably fitted, and is attached to the tip of the support rod, and the angle indicator is fitted to the bent portion of the pipe attached to the center of the angle scale plate and It is configured to indicate an angle.

[0011]

In the above structure, in use, the bent portion of the pipe is attached to the center of the angle scale plate, and the angle indicator is fitted to the bend portion on the front surface side of the angle scale plate. The unprocessed part of is locked to the locking hook of the main body. Here, the angle of the bent portion of the pipe can be visually checked between the angle indicator and the angle scale plate, and the angle of the bent portion can be determined. After that, the unprocessed part of the pipe may be bent between the disk part and the pressing part of the movable side lever.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to an embodiment shown in FIGS. FIG. 1 is a perspective view of a pipe bender according to an embodiment of the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a perspective view of an angle scale plate portion.

The pipe bender of this embodiment comprises a main body 1,
A movable lever 2 is provided, and the main body 1 is provided with a fixed lever 3, a locking hook 4 for the pipe P, and a disc portion 5 as a receiving seat for bending work. , The same as a traditional pipe vendor. In addition, the movable side lever 2
Is attached to the main body 1 via a swinging piece 6 so as to be swingable, and a pipe P is attached to the movable lever 2 and the disc portion 5.
The point that the pressing portion 7 for pressing is provided is also the same as the conventional example.

The pipe bender of this embodiment is different from the prior art in that it has a support rod 8, an angle graduation plate 9, an auxiliary graduation plate 10 and an angle indicator 11.

The support rod 8 is extendable and retractable and is attached to the main body 1 by means of a pivot metal fitting 12 so that it can be folded along the side edge of the main body 1 and in the standing state, the side opposite to the disc portion 5 It is designed to extend to. The angle graduation plate 9 has a disc shape, an eccentric part thereof is attached to the tip of the support rod 8, and a central part thereof is supported at a position facing the inner space of the locking hook 4. The angle graduation plate 9 has a locking side portion of the pipe P removably fitted in the center thereof, and a cut groove 9a is formed from the outer periphery to the central portion. The auxiliary scale plate 10 overlaps the back surface of the angle scale plate 9 to compensate for the lack of the scale 9b in the cut groove 9a, and is substantially semicircular and is rotatably attached to the support rod 8. The angle indicator 11 indicates the angle of the bent portion with the angle scale plate 9 by being fitted to the bent portion of the pipe P mounted in the center of the angle scale plate 9, and is made of a transparent resin. Which has the angle indicating mark 11a on the surface and is similar to the angle scale plate 9
1b is formed.

Next, a method of using the above configuration will be described. When forming two bends in the pipe P, first, one bend is formed in the same procedure as in the conventional pipe bender.
That is, the pipe P is locked to the inside of the locking hook 4, and the vicinity thereof is sandwiched between the disk portion 5 and the pressing portion 7, and in that state, the movable side lever 2 is moved toward the fixed side lever 3. The pressing portion 7 is pulled and rotated around the disk portion 5.

As shown in FIG. 3, the pipe P on which one of the bent portions is formed is attached to the center of the angle scale plate 9 so that the bent portion is located on the surface side of the angle scale plate 9. Then, the auxiliary scale plate 10 is superposed on the back side of the angle scale plate 9. By overlapping the auxiliary scale plate 10 on the back surface of the angle scale plate 9, both scales 9b and 10a are continuous over the entire circumference, and there is no lack of scale in the cut groove 9a. At this time, the unprocessed part of the pipe P is locked inside the locking hook 4. Further, the length of the support rod 8 is adjusted to a length according to the distance between the two bent portions.

On the surface of the angle scale plate 9, only the bent portion of the pipe P is exposed, and the bent portion extends from the center of the angle scale plate 9 in any radial direction. In this state,
When the angle indicator 11 is fitted to the bent portion, the angle indicator 11
Is concentrically overlapped with the surface of the angle scale plate 9 at an angle corresponding to the direction of the bent portion of the pipe P. The angle indicating mark 11a of the angle indicator 11 indicates the angle of the bent portion on the scale 9b of the angle scale plate 9, and the angle of the bent portion can be visually checked. Therefore, while visually observing the angle indicating mark 11a and the scale 9b, the bent portion of the pipe P and the angle indicator 11 are appropriately turned, and the angle of the bent portion is adjusted to determine the angle.

When the angle of the bent portion is determined, the movable side lever 2 is pulled toward the fixed side lever 3 on the main body 1 side, and a second portion is formed between the disk portion 5 and the pressing portion 7 on the unprocessed portion of the pipe P. Form a bend. In this way, two bends are formed in one pipe P.

The angle graduation plate 9 has a double structure with the auxiliary graduation plate 10 as shown in the drawing, and a plate body for filling the cut groove 9a is attached to the edge of the cut groove 9a by a butterfly. Alternatively, it may be folded back if necessary.

[0021]

As described above in detail, according to the present invention,
With the bent part already formed on the pipe accurately angled, the other bent part can be formed.
It is possible to perform dimensional bending accurately without any trouble.

[Brief description of drawings]

FIG. 1 is a perspective view of a pipe bender according to an embodiment of the present invention.

FIG. 2 is a side view of the above embodiment.

FIG. 3 is a perspective view of an angle scale plate portion of the above embodiment.

FIG. 4 is a side view of a conventional pipe bender.

FIG. 5 is an explanatory view showing an example of bending of a pipe.

[Explanation of symbols]

 1 Main body 2 Movable side lever 3 Fixed side lever 4 Locking hook 5 Disk part 7 Pressing part 8 Support rod 9 Angle scale plate 11 Angle indicator

Claims (1)

(57) [Scope of utility model registration request] 1. A body (1) having a fixed lever (3)
And a movable lever (2) swingably attached to the main body (1). The main body (1) has a locking hook (4) for the pipe and a disc portion as a receiving seat for the pipe. (5)
And the movable lever (2) is provided with a disk portion (5).
In a pipe bender in which a pressing portion (7) for pressing a pipe is provided, a support rod (8) capable of expanding and contracting and an angle scale plate (9)
And an angle indicator (11), and the support rod (8) is attached to the main body (1) and extends to the side opposite to the disc portion (5). ) Is a pipe into which the pipe is detachably fitted, and is attached to the tip of the support rod (8). The angle indicator (11) is a bend of the pipe attached to the center of the angle scale plate (9). A pipe bender fitted to the portion to indicate the angle of the bent portion with respect to the angle scale plate (9).