JPS6235526Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a manual pipe corrugation device.

Generally, when corrugating the circumferential surface of a pipe made of steel, aluminum, stainless steel, etc. for the purpose of giving it flexibility, a fixed pipe corrugation device such as a tie type, roll type, or ring type is generally used. is used. In these corrugation devices, it is necessary to change the parts of the corrugation portion depending on the outer diameter of the pipe, and the device itself becomes quite large-scale. Moreover, since the direction in which the parts of the corrugated part are attached to the pipe is limited to the direction from the end of the pipe, for example, when corrugating only the middle part of the pipe, the attachment is troublesome.

This idea was made in view of the above circumstances,
Even if the outside diameter of the pipe changes, there is no need to replace the corrugating rolls, and it has a guide mechanism that allows the center of rotation of the frame to always match the center of the pipe according to the outside diameter, and the frame can be divided. Another object of the present invention is to provide a manual pipe corrugating device which allows the frame to be easily attached from the radial direction of the pipe.

An embodiment of this invention will be described below based on the drawings.

Reference numeral 1 in FIGS. 1 to 3 denotes approximately triangular left and right plates, each of which has a pipe insertion hole 1a in the center thereof, through which the pipe 2 is inserted. Between the left and right plates 1, there are holes 6 arranged at equal intervals along the circumferential direction of the pipe insertion hole 1a.
Two stays 3 are installed, thereby connecting the plates 1 symmetrically on the left and right sides and parallel to each other at a predetermined interval. The left and right plates 1 are indicated by A- in FIG.
It is said that it can be divided into two parts along the A line,
These divided parts are usually connected by bolts 5 and nuts 6 as shown in FIG. In this way, the left and right plates 1 and the six stays 3
A frame 4 is constructed which can be divided into two parts and combined at will.

A support plate 7 is installed between three locations corresponding to the tops of the substantially triangular left and right plates 1 by screwing bolts 8, welding, or the like. Bolt insertion holes 7a are provided at predetermined locations on each of the support plates 7,
This bolt insertion hole 7a is inserted from the outside of the support plate 7.
An outer cylindrical body 10 is attached to the inside of the support plate 7 by bolts 9 that are loosely fitted into the support plate 7. The outer cylindrical body 10 is fixed at any rotational position within a predetermined rotational angle θ, corresponding to the loose fit range of the bolt 9 in the bolt insertion hole 7a. Further, the outer cylindrical body 10 is provided with a protrusion 10a that penetrates and protrudes outwardly from the support plate 7 in a loosely fitted state.
A rotation adjustment screw 11 is screwed onto the outside of the support plate 7 facing a.
1 and pushing the protrusion 10a with its tip, the outer cylinder 10 can be adjusted to an appropriate rotational position.

An inner cylinder 13, which is prevented from rotating by a pin 12, is fitted into the outer cylinder 10 so as to be movable along the radial direction of the pipe insertion hole 1a, that is, along the radial direction of the pipe 2. A corrugated roll 14 is rotatably supported at the tip of the inner cylinder 13, and a female threaded portion 13a is formed on the inner peripheral surface thereof. A telescopic adjustment screw 15 is rotatably supported on the support plate 7, and a threaded portion at one end of the telescopic adjustment screw 15 is screwed into a female threaded portion 13a of the inner cylinder 13. By appropriately rotating the corrugated roll 14 from the outside of the support plate 7, the corrugated roll 14 can be moved and adjusted as appropriate along the radial direction of the pipe 2.

The three corrugating rolls 14 are arranged at equal intervals along the circumferential direction of the pipe insertion hole 1a, that is, along the circumferential direction of the pipe 2, and at a distance of 1/3 of the corrugating pitch along the length direction of the pipe 2. They are arranged in such a way that they are shifted one by one.

A total of six guide bases 16, three each, are fixed to predetermined locations on the outer surface 1b of the left and right plates 1 by bolts 17. Each guide base 16 is provided with a pair of guides 18, and a holder 20 is attached to the pair of guides 18 via a slide member 19 in the radial direction of the pipe insertion hole 1a, that is, in the radial direction of the pipe 2. It is supported so that it can move freely along. A plate-shaped pipe guide 21 is attached to the front part of the holder 20. This pipe guide 21 is the first
Maximum outer diameter that can be corrugated as shown by the solid line in the diagram
It is curved in a shape that follows the outer peripheral surface of the Rmax pipe 2, and the outer peripheral surface is lined with Teflon processing or the like.

At the rear part of the holding body 20, a mounting member 22 is provided.
One end of the adjustment screw 23 is rotatably attached via the . The middle part of the adjustment screw 23 is screwed into a screw support part 16a protruding from the guide base 16, and the other end is provided with a handle 24. The pipe guide 21 can be moved and adjusted as appropriate along the radial direction of the pipe 2 by appropriately rotating the pipe guide 21 through the pipe 2 . Further, a scale 25 and an index 26 are formed on one opposing portion of the pair of guides 18 and the slide member 19, so that the amount of movement adjustment of all the pipe guides 21 can be confirmed.

Therefore, the total six pipe guides 21 are left and right symmetrical on the left and right plates 1, and are arranged so as to face the corrugating roll 14 in the front view of the present corrugating device (FIG. 1). In other words, each pipe guide 21 is arranged at six positions shifted in the length direction of the pipe 2 from three positions facing each of the corrugated rolls 14 via the pipe 2. Further, in this embodiment, two guide bases 16 are disposed on the dividing line A-A of the left and right plates 1, 1 so as to cross each other, and these guide bases stand 16
is adapted to reinforce the integral connection of the main body frame 4.

Reference numeral 27 in FIG. 1 is a handle for rotating the frame 4, one end of which is bifurcated, and a locking groove 2 is provided at the tip of the handle.
7a is provided, and by appropriately fitting the locking grooves 27a into the mutually adjacent intermediate portions of the six stays 3, the frame 4 can be attached to the frame 4 in any one of the total six mounting configurations. It is configured so that it can be detachably attached to the body.

Next, the operation of the corrugating device having the above configuration will be explained.

First, the present corrugating device must be attached to the pipe 2, and in this case there are two methods. One method is to insert the pipe 2 from its end into the pipe insertion hole 1a while the frame 4 remains integrally connected as shown in FIG.
This is the same method as before. Another method is to divide the frame 4 into two parts along the dividing line A-A, and insert the frame 4 into two parts so that an appropriate part of the pipe 2 is directly inserted into the pipe insertion hole 1a from the radial direction of the pipe 2. This is a method of combining. Therefore, according to the latter installation method, for example, pipe 2
If corrugation is applied only to the middle part of the pipe 2, it can be attached directly to the middle part of the pipe 2.

Note that when the frame 4 is divided into two parts, it is not necessary to completely remove the guide base 16 on the dividing line A-A, and it is sufficient to leave it supported by the divided part body on one side of the frame 4.

Next, the pipe 2 inserted into the pipe insertion hole 1a
Rotate the adjustment screw 23 according to the size (outer diameter Rmin to Rmax), and move all the pipe guides 21 by the same amount in the radial direction of the pipe 2 while checking with the scale 25 and index 26. , the inner peripheral surfaces of these pipe guides 21 are brought into surface contact with the outer peripheral surface of the pipe 2. In this way, the center of rotation of the frame 4 can be matched with the center of the pipe 2 to accommodate pipes 2 of different sizes.

Then, the direction of the corrugated roll 14 is adjusted and fixed in an appropriate direction using the rotation adjustment screw 11 and the bolt 9, and the corrugated roll 14 is inserted into the outer peripheral surface of the pipe 2 by an appropriate amount using the expansion adjustment screw 15. let Then, by attaching the handle 27 to the frame 4 in an arbitrary manner and rotating the frame 4 via the handle 27, appropriate corrugations are applied to the outer peripheral surface of the pipe 2.

The pressing force of each corrugating roll 14 on the pipe 2 is received by the pipe guide 21 facing each corrugating roll 14 in the front view of the present corrugating apparatus (FIG. 1). Moreover, since the pipe guide 21 is in surface contact with the outer peripheral surface of the pipe 2, the contact surface on the pipe guide 21 side becomes a pressure receiving surface, and the pressure of the corrugated roll 14 is applied to the pipe 2.
Abnormal deformation of the frame 4 is prevented, and at the same time eccentricity of the rotation center of the frame 4 is prevented. Therefore, it is preferable to extend the pipe guide 21 as much as possible in the length direction of the pipe 2, for example, to increase the area of contact with the pipe 2. In addition, as the outer diameter of the pipe 2 to which corrugation is applied becomes smaller, this pipe 2
Although the contact area of the pipe guide 21 with respect to the pipe guide 21 gradually decreases, a sufficient contact area can be obtained even when the outer diameter of the pipe 2 is Rmin. Further, the pipe guide 21 may be configured to be able to be attached and replaced with one having a different inner peripheral surface curvature as appropriate.

Furthermore, in order to reduce the coefficient of friction between the pipe 2 and the pipe guide 21, it is recommended to apply grease, lubricating oil, etc. between the pipe 2 and the pipe guide 21, and to arrange the pipe guide 21 at a position that truly faces the corrugated roll 14. Good too.

Further, the number of the corrugated rolls 14 to be provided is not limited at all, and may be one, for example, and the arrangement form of the corrugated rolls 14 is also arbitrary.
For example, three corrugated rolls 14 may be arranged at positions shifted by a distance of 1/3P+nP along the length direction of the pipe 2 (P is a corrugated pitch, n is an arbitrary integer).

Further, the frame 4 may be configured to be able to be opened and closed from the dividing line A-A via a hinge.

By the way, in this example, the outer diameter is 125 mm,
When corrugating an aluminum pipe with a wall thickness of 3 mm with a pitch of 30 mm, the angle formed by the direction of the corrugating roll 14 with respect to the circumferential direction of the pipe is 4.4 degrees, that is,
tan ^-1 P/πD (P is the corrugated pitch, D is the outer diameter of the pipe), and the penetration depth of the corrugated roll 14 is 3 mm.
If the length from the center of rotation of the frame 4 to the operating part of the handle 27 is 30 cm, the frame 4 can be rotated with an operating force of about 2 kg, and by repeating this operation about 3 times, the desired wave can be obtained. I was able to attach it.

As explained above, according to the manual pipe corrugation device of this invention, the frame is placed in surface contact with the outer circumferential surface of the pipe on the opposite side of the part where the corrugation roll contacts when the pipe is viewed from the end direction. Since it has a supported pipe guide and a guide adjustment means that can move and adjust the pipe guide in the radial direction of the pipe, the pipe guide can be adjusted to the outer periphery of the pipe to accommodate various pipes with different outer diameters. As a result, the center of rotation of the frame can be very easily aligned with the center of the pipe to prevent eccentricity of the center of rotation, and the pressing force of the corrugated roll against the pipe is Since pressure is accurately received by the pipe guide facing the corrugated roll when viewed from the end direction, abnormal deformation such as rectangularization of the pipe can be reliably prevented, and
Good corrugation can be achieved by appropriately applying the corrugating force of the corrugating roll.

Furthermore, if the frame can be divided and combined so that the pipe can be inserted into the pipe insertion hole from the radial direction, the frame can be attached not only from the end of the pipe but also from the radial direction. For example, if corrugation is applied only to the middle part of the pipe, the frame can be easily attached directly to the middle part.

Furthermore, if the handle is removably attached to the outer periphery of the frame, the frame can be easily attached to the pipe without the handle being removed and the handle does not get in the way, and the storage space of the device itself is small. It has the following effects.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention. FIG. 1 is a partially cutaway front view of a manual pipe corrugating device according to the present invention. FIG. 2 is a partially cutaway side view of the main part as viewed from the direction of the arrow in FIG. 1. FIG.
FIG. 4 is a cross-sectional view taken along line - in FIG. 1, and FIG. 5 is a cross-sectional view taken along line - in FIG. 1. 1a... pipe insertion hole, 2... pipe, 4...
Frame, 14...corrugated roll, 15...tension adjustment screw, 21...pipe guide, 23...adjustment screw, 27...handle.

Claims (1)

[Claims for Utility Model Registration] 1. A frame 4 having a pipe insertion hole 1a through which the pipe 2 is rotatably inserted, and a corrugated roll 14 supported by the frame 4 and abutting against the outer peripheral surface of the pipe 2. , a manual pipe corrugating device comprising a roll adjustment means capable of moving and adjusting the corrugating roll 14 in the radial direction of the pipe 2, and a handle 27 for rotation operation attached to the outer periphery of the frame 4, A pipe guide 21 is supported on the frame 4 so as to be in surface contact with the outer peripheral surface of the pipe 2 on the opposite side of the part where the corrugated roll 14 comes into contact when the pipe 2 is viewed from the end direction, and the pipe guide 21 1. A manual pipe corrugation device comprising a guide adjusting means that can be moved and adjusted in the radial direction of the pipe 2. 2. The manual type according to claim 1, characterized in that the frame 4 can be freely divided and combined so that the pipe 2 can be inserted into the pipe insertion hole 1a from the radial direction thereof. Pipe corrugation device. 3. The manual pipe corrugating device according to claim 1 or 2, wherein the handle 27 is detachably attached to the outer circumference of the frame 4.