JPH10100245A - Bending tool for pipe - Google Patents

Abstract

(57) [Summary] [Problem] Even in a tube body having a strong repulsion force against bending,
Provided is a bending tool for a pipe body, which can surely maintain a right-angle posture without being deformed. SOLUTION: Two sets of halves forming a pair of annular bodies 1 and 2 fitted in the circumferential direction at both sides a and b of a place h where a flexible tubular body H is to be bent and formed. The annular portions 1a, 2a and 1b, 2b are connected to the connecting portions 3a, 3b, respectively.
Are connected in a substantially right angle direction through the two half-shaped annular portions 1a, 2a and the other two half-shaped annular portions 1
b and 2b are integrally connected by a foldable portion f which is freely foldable at one end portions 4a and 4b, and are mutually fitted to the connection portions 3a and 3b and the other end portions 5a and 5b. Fitting bodies 6a, 6b and 7a, 7b are formed, and one of the two halved annular portions 1a, 2a and the other two halved annular portions 1b, 2b are respectively held by spacing members 8a, 8b. It is a linked structure,
The whole is integrally formed of a synthetic resin material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending tool used for bending a flexible tubular body at a required position where bending is required at a substantially right angle.

[0002]

2. Description of the Related Art Conventionally, flexible tubes such as hoses have been used.
As a means for forming a bent at a substantially right angle at a required portion, a member for bending such as an elbow is used, and the tube is cut and inserted from both sides thereof and bonded with an adhesive or the like to be connected. It was a common measure.

[0003]

Therefore, it takes time and trouble to pipe the pipe in a bent posture at a substantially right angle.

[0004] In piping such a flexible pipe, it is necessary to pipe the pipe so as to be bent at a substantially right angle, for example, pipes for wire protection pipes for indoor wiring, and are required for machine tools and other various machines. The necessity often arises from the relationship between the state of the indoor space, the space of the piping, etc. in the used piping. In particular, when the pipe to be piped is a drain pipe, for example, a drain pipe of an electric washing machine and other drain pipes,
Because of the necessity of connecting so as to maintain a watertight state, piping using an elbow or the like particularly requires time and trouble.

Therefore, the present inventors and the applicant have been able to meet such a demand and have an object to solve such a conventional problem. Regarding the washing machine hose, we have proposed a basic structure of a bending tool for a washing machine hose that can be bent almost at a right angle regardless of the curvature of (Application for Japanese Patent Application No. Hei 8-144951).

[0006] However, although the tube bending tool proposed in the prior art is a thin-walled hose such as the hose for a washing machine, which can be easily bent and has a low repulsive force, it can be used sufficiently. As a result of various experiments, in the case of a tubular body having a strong repulsive force against bending, the annular bodies 1 and 2 cannot fully withstand the repulsive force of the tubular body, and the connecting portions 3a,
3b tended to open at obtuse angles to each other, and it was confirmed that it was difficult to maintain a right-angled posture.

Therefore, the present inventor has proposed a tube body having a structure which can reliably maintain a predetermined right-angle posture without causing such a phenomenon while using a synthetic resin material. Is proposed here.

[0008]

Means for solving the problems The structure of the present invention which has been adopted to achieve the object will be described with reference to the reference numerals used in the embodiments. The first structure is a flexible tubular body H. In the places a and b on both sides of the place h to be bent,
Two sets of half-shaped annular portions 1a, 2a and 1b, 2b constituting a pair of annular bodies 1, 2 fitted in the circumferential direction are connected in a substantially right-angle direction via connecting portions 3a, 3b, respectively. The two half-split annular portions 1a, 2a and the other two half-split annular portions 1b, 2b are integrally connected at one end side portions 4a, 4b by a foldable portion f which is freely foldable. 3a, 3b and respective other end portions 5
a, 6b and 7a, which are fitted to each other
7b are formed, and one of the two half-shaped annular portions 1 is formed.
a, 2a and the other two half-split annular portions 1b, 2b are connected by spacing members 8a, 8b, respectively, and the whole is integrally formed of a synthetic resin material. It is what it was.

[0009] The second configuration is that a flexible tubular body H is formed on both sides a and b of a place h to be bent and formed.
Two sets of half-split annular portions 1a, 2a and 1b, 2b constituting a pair of annular bodies 1, 2 fitted in the circumferential direction are connected in a substantially right-angle direction via connecting portions 3a, 3b, respectively. The two half-shaped annular portions 1a, 2a and the other two half-shaped annular portions 1b, 2b are integrally connected at the connecting portions 3a, 3b by a foldable bending portion f,
Fitting bodies 6a, which are fitted to the one end portions 4a, 4b and the other end portions 5a, 5b separated from the connecting portions 3a, 3b, respectively.
6b, 7a and 7b are formed, and one of the two halved annular portions 1a and 2a and the other two halved annular portions 1
b and 2b are connected to each other by spacing members 8a and 8b, respectively, and the whole of them is integrally formed of a synthetic resin material.

The third structure comprises a pair of annular bodies 1 and 2 fitted in the circumferential direction at both sides a and b of a place h where a flexible tubular body H is to be bent. The two sets of half-split annular portions 1a, 2a and 1b, 2b are connected substantially at right angles via connecting portions 3a, 3b, respectively.
These two half-split annular portions 1a, 2a and the other two half-split annular portions 1b, 2b are connected to the connecting portions 3a, 3b.
b, one end portions 4a, 4b and the other end portion 5a,
5b are integrally connected to each other by foldable bent portions f, f to form fitting bodies 6a, 6b which are fitted to the connecting portions 3a, 3b, respectively. 1a, 2a and the other two half-split annular portions 1
b and 2b are connected to each other by spacing members 8a and 8b, respectively, and the whole of them is integrally formed of a synthetic resin material.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is configured as described above. In implementing the present invention, two sets of half-shaped annular portions 1a and 2a constituting the pair of annular bodies 1 and 2 are used. 1b and 2b may be formed in a string shape or a flat band shape, or may be reinforced by ribs such as a triangular cross-section or a T-shape, L-shape, or U-shape. A space holding member 8a connecting the two half-split annular portions,
8b can be implemented as a triangular cross-section or a T-shaped, L-shaped, U-shaped or the like. As shown in FIG. 1, it is preferable that the connecting portions of the spacing members 8a and 8b to the half-split annular portions are formed on the large diameter side during use.
It is sufficient if it is a place distant from a and 3b, and it may be a substantially intermediate place between the respective half-shaped annular portions 1a and 2a and 1b and 2b. In addition, the spacing member 8
a and 8b are not limited to only one, but are arranged in two parallel shapes, two intermediate portions are connected in the vertical direction to form an E-shape, or two are crossed to form an X-shape. It may be carried out as a shape. Regarding the fitting bodies 6a, 6b and 7a, 7b, one of them is a fitting hole irrespective of the shape, and the other is a fitting projection that fits into the fitting hole in that the connection is easy. preferable. The number of the fitting bodies 6a, 6b and 7a, 7b is not limited to one, and two or more fitting bodies can be formed as needed.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 are views showing a first embodiment of the present invention. FIG. 1 is a perspective view showing an entire shape in an unfolded state, and FIGS. 2 and 3 are plan views and rear views. Indicates that
FIG. 4 is a perspective view showing the entire shape of the connected state, and FIG.
FIG. 6 is a plan view showing a used state.

In the tube bending tool shown in the first embodiment, reference numerals 1 and 2 shown in FIG. 4 denote pipe members at both sides of a portion where the tube is to be bent. Are a pair of annular bodies for fitting in the circumferential direction. These annular bodies 1 and 2 are composed of two sets of half-split annular sections 1a, 1b and 2
a2b. As shown in FIGS. 1 to 3, these half-split annular portions form a pair of two half-split annular portions 1a, 2a and 1b, 2b in a substantially right angle direction by connecting portions 3a, 3b. It is connected toward. Also, one of the two half-split annular portions 1a, 2a
The other half-split annular portions 1b and 2b are integrally connected at one end portions 4a and 4b by a bent portion f formed in a thin shape and made freely foldable.

Fitting members 6a, 6b and 7a, 7b are formed on the connecting portions 3a, 3b and the other end (free end side) portions 5a, 5b, respectively, to be fitted to each other. The fitting body in this embodiment includes a connecting portion 3a on one of the half-shaped annular portions 1a and 2a and small fitting holes 6a and 7a formed in the free end portion 5a, and the other half-shaped annular portions 1b and 1b. The connecting portion 3b on the 2b side and the mushroom-shaped fitting projections 6b and 7b formed on the free end portion 5b are formed. Thus, furthermore, one of the two half-shaped annular portions 1
a, 2a and the other two half-shaped annular portions 1b, 2b each have an arcuate cross-sectional shape in plan view between the one end portions 4a, 4b and the other end portions 5a, 5b. Are connected by the L-shaped spacing members 8a and 8b. And the whole of them is integrally formed of a synthetic resin material.

The bending tool having such a structure is shown in FIG.
As shown in the figure, the tube (hose) to be bent and formed
At one side b of a portion h where the bending is desired to be formed in H, first, the half-shaped annular portions 2a and 2b which are folded in two from the bent portion f are attached to the connecting portions 3a and 3b along the outer peripheral surfaces thereof. The formed fitting bodies 6a and 6b are fitted to each other, and then a portion h to be bent and formed is bent into an L-shape. On the other side a, the half annular portions 1a and 1b similarly facing each other. Is fitted along the outer peripheral surface thereof and fitting bodies 7a and 7b formed on the free end side parts 5a and 5b are fitted to each other, so that the tubular body H is bent at a substantially right angle. The tube H shown in this figure is a washing machine hose (flexible tube) used by connecting one end to a drain of a washing tub in an electric washing machine.

In this way, the bending tool attached to the tube H is provided with the spacing members 8a, 8b, which are connected in a bridging manner between the bent portion f side and the free end side of the annular bodies 1, 2. Since the angles of the annular bodies 1 and 2 are determined by the presence of 8b, the tube H is reliably prevented from being deformed by a force that attempts to restore to a straight line, and the right angle state is maintained.

The spacing members 8a, 8a,
Although 8b is shown as having an L-shaped cross section as shown in FIG. 5, this shape may be a flat shape, or a U-shaped cross section as shown in FIG. And
(B) As shown in the figure, the cross section may be T-shaped. In addition, the sectional shape of the half-ring-shaped annular bodies constituting the annular bodies 1 and 2 is not limited to a flat belt-like one, but may be L-shaped, T-shaped, U-shaped or the like. May be carried out as an increase.

FIGS. 8 to 10 show the structure of the second embodiment, in which the bending tool shown in the second embodiment includes connecting portions 3a, 3 of half-split annular portions 1a, 2a and 1b, 2b.
b, the connecting portion 3
The foldable portion f shown in the first embodiment, which is freely foldable, is formed in the portions a and 3b, and the half-split annular portions 1a and 2 are formed.
a, 1b, 2b, and one end portions 4a, 4b and the other end portions 5a, 5b are formed with fitting bodies 6a, 6b and 7a, 7b to be fitted to each other. The other points are the same as those of the first embodiment, and the description is omitted.

The embodiment shown in FIG. 11 shows a modification of the bending tool shown in the second embodiment. The bending tool shown in this embodiment is the same as that shown in the second embodiment. Of the divided spacing members 8a, 8b into half-shaped annular portions 1a, 2
1a, 1b and 2b, and are connected to project from portions slightly away from the one end portions 4a, 4b and the other end portions 5a, 5b. Needless to say, the arc-shaped curved surface has a shape along the outer peripheral curved surface of the tube in the mounting posture to the tube.

FIG. 12 shows the structure of the third embodiment. The bending tool shown in the third embodiment includes one end side portions 4a, 4b of the half-split annular portions 1a, 2a and 1b, 2b. The end portions 5a and 5b are connected to each other, and the foldable portions f shown in the first embodiment are formed on the portions 5a and 5b. Connection parts 3a, 3b of 1b, 2b
This has a structure in which fitting bodies 6a and 6b that fit each other are formed. Further, as shown in the embodiment of FIG. 11, the spacing members 8a and 8b are connected to the one-end side portions 4a and 4b of the half-split annular portions 1a and 2a and 1b and 2b.
b and the other end side portions 5a and 5b are connected protrudingly from a place slightly away from them. The other points are the same as those of the first embodiment, and the description is omitted.

Although the typical embodiments of the present invention have been described above, the present invention is not limited to only those shown in these embodiments. For example, one end portions 4a, 4a, A structure in which a plurality of fitting bodies 6a, 6b and 7a, 7b to be fitted to each other are formed not in one but in a plurality at 4b, at the other end portions 5a, 5b or at the connecting portions 3a, 3b in the third embodiment. The shape of the projection in this fitting body is not divided into four, but is divided into two parts, or without a split groove. The present invention has the constituent features of the invention, achieves the above object, and can be implemented with appropriate modifications within a range having the following effects.

[0022]

As is clear from the above description, the bending tool for a tubular body according to the present invention comprises a pair of circumferentially fitting outer circumferential surfaces on both sides of a portion of the tubular body to be bent. The annular body is divided into two parts, so that it can be easily inserted into the pipe body, but between the two half-part annular parts constituting these annular bodies, the two annular parts are held in a right angle posture. It is a structure that is connected by the interval holding body, so that when it is attached to the tube, the right angle posture is not disturbed by the restoring force of the tube, and the tube is kept at a right angle even when used over time. It has a remarkable effect that it can be formed in a posture and can be provided to the market easily and inexpensively because it has a structure integrally formed of a synthetic resin material as a whole. Things.

[Brief description of the drawings]

FIG. 1 is a perspective view of a deployed state showing a first embodiment.

FIG. 2 is a plan view of the same.

FIG. 3 is a rear view of the same.

FIG. 4 is a perspective view showing a shape at the time of use.

FIG. 5 is a sectional end view taken along line AA in FIG. 4;

FIG. 6 is a side view showing the same use state.

FIG. 7 is an end view of a portion corresponding to FIG. 5 showing another embodiment.

FIG. 8 is a perspective view of a deployed state showing the second embodiment.

FIG. 9 is a plan view of the same.

FIG. 10 is a side view showing the same use state.

FIG. 11 is an exploded perspective view showing a modified structure according to the second embodiment.

FIG. 12 is a plan view showing a third embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Annular body 2 Annular body 1a Half-split annular part 1b Half-split annular part 2a Half-split annular part 2b Half-split annular part 3a Connecting part 3b Connecting part 4a One end side part 4b One end side part 5a Other end side part 5b Other end portion 6a Fitting body 6b Fitting body 7a Fitting body 7b Fitting body 8a Spacing holder 8b Spacing holder

Claims (3)

[Claims] 1. Two sets of half-shapes forming a pair of annular bodies (1) and (2) to be fitted in the circumferential direction at both sides of a place where a flexible tubular body is to be bent and formed. Annular part (1a) (2
a), (1b) and (2b) are connected in a substantially right-angle direction through connecting portions (3a) and (3b), respectively, and one of the two half-shaped annular portions (1
a), (2a) and the other two half-shaped annular portions (1b), (2b) are integrally formed by a foldable portion (f) which can be folded at one end portion (4a), (4b). Are connected, and the connecting portions (3a), (3
(b) and the other end portions (5a) and (5b) are formed with fitting bodies (6a) (6b) and (7a) (7b) which are fitted to each other. Annular parts (1a), (2a) and the other two half-part annular parts (1b), (2b) are spacing members (8a), (8b), respectively.
Are formed by a synthetic resin material. 2. A pair of half-shapes forming a pair of annular bodies (1) and (2) which are fitted in the circumferential direction at both sides of a place where a flexible tubular body is to be bent. Annular part (1a) (2
a), (1b) and (2b) are connected in a substantially right-angle direction through connecting parts (3a) and (3b), respectively, and one of these two half-ringed annular parts (1a) and (2a) is connected to the other. Two half-rings (1b), (2b)
Is a foldable portion that can be folded at the connecting portions (3a) and (3b).
(f), and are integrally connected to one end side parts (4a) and (4b) remote from the connection parts (3a) and (3b) and the other end side parts (5a) and (5b). Fitting bodies (6a) (6b), (7a) and (7b) are formed, and one of the two half-shaped annular parts (1a) and (2a) and the other two half-shaped annular parts (1b ) And (2b) are connected by spacing members (8a) and (8b), respectively.
A bending tool for a pipe body in which the entirety is integrally formed of a synthetic resin material. 3. Two sets of half-shapes forming a pair of annular bodies (1) and (2) to be fitted in the circumferential direction at both sides of a place where a flexible tubular body is to be bent and formed. Annular part (1a) (2
a), (1b) and (2b) are connected in a substantially right-angle direction through connecting parts (3a) and (3b), respectively, and one of these two half-ringed annular parts (1a) and (2a) is connected to the other. Two half-rings (1b), (2b)
Are separated from the connecting parts (3a) and (3b) on one end side (4a), (4
b) and the other end portions (5a) and (5b) are integrally connected by foldable bending portions (f) and (f), and the connecting portion (3
a) and (3b) are formed with fitting bodies (6a) and (6b) to be fitted to each other, and one of the two half-shaped annular portions (1a) and (2a) and the other two half Annular parts (1b) and (2b) are connected by spacing members (8a) and (8b), respectively.
A bending tool for a pipe body in which the entirety is integrally formed of a synthetic resin material.