JPH0733032Y2 - Clamps for electrofusion fittings - Google Patents

Description

TECHNICAL FIELD The present invention relates to a clamp used for fusion-bonding an electrofusion joint and a plastic pipe in a plumbing work using a plastic tube, particularly a T joint, an elbow joint, The present invention relates to a clamp that can be used as a plurality of different types of joints among electrofusion joints such as socket joints and cap joints.

Conventional technology When connecting plastic pipes using T-joints, elbow joints, socket joints, saddle joints, etc., or closing the pipe ends with cap joints in piping work such as water supply and sewerage and gas pipes using plastic pipes, , The inner peripheral surface of the joint and the outer peripheral surface of the plastic pipe are heated and melted by a heater, and then the joint is fitted into the pipe, or the side surface of the pipe is crimped to fuse the joint and the plastic pipe. An electrofusion joint with a heating wire embedded in it has been developed. According to this joint, fusion is performed by positioning the pipe and the joint and then energizing, and there is an advantage that the fusion can be performed easily and surely, but at the time of construction, the joint is simply fitted and inserted into the pipe. Or, even if the joint is positioned and attached to the square-angled pipe only by being applied, the joint or the pipe is likely to be displaced or deviated from the set position after the positioning, especially during fusion due to energization. For that reason, and also for facilitating the positioning of the pipe, a clamp for gripping the pipe has been generally used in the past. After positioning, the clamp grips and fixes the pipe, and the clamp has a different shape. A dedicated one has been used for each joint.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention As described above, conventional clamps are used in accordance with the type of fitting, so the number of clamps increases, and the number of clamps increases, and the number of clamps used during transportation, storage, and construction of lamps is increased. The selection was complicated.

An object of the present invention is to reduce the number of clamps so that they can be used for different kinds of joints, and thus to solve the above problems.

Means for Solving the Problems A clamp according to one aspect of the present invention includes a pair of clamp pieces that are openably and closably connected by a hinge, and has three grip portions integrally provided with the clamp pieces. Of each holding part, two places are located facing each other with a certain distance, and the plastic pipes inserted on both sides of the joint can be fixed by one or two fastening means respectively, and the other one place. The plastic pipe bent at an appropriate angle with the plastic pipe and inserted into the joint can be fixed by the fastening means.

In another embodiment, the clamp has a gripping part similar to that described above.
It is possible to have more than one place, two places of which fix the plastic pipes inserted on both sides of the joint by one or two fastening means, and the other places fix a plurality of plastics branched from the joint by the fastening means respectively. You can do it.

The gripping portion in each of the above-mentioned embodiments is, for example, a plastic tube that is wrapped around, one or several projections are formed inside each clamp piece, and the plastic tube is gripped by the projections at several locations on the circumference during clamping. Something you have.

A clamp according to another aspect includes an accommodating portion which is made of an openable and closable metal fitting, and in which a joint is accommodated, and a grip portion for hugging a plastic pipe by one or two fastening means at a plurality of side portions thereof. One or a few openings are formed in the storage portion corresponding to the terminals of the joint, and the terminals of the joint are detachably connected to the connector.

In a clamp having three gripping portions, when used for a socket joint, two gripping portions located at opposite sides are used, and one or more plastic pipes are inserted and positioned from the both sides of the joint. Secure with two fastening means. When used for a T-joint, three gripping portions are used to fix a plastic pipe extending on both sides of the joint and a plastic pipe branched and extending from the joint by the fastening means. When using it for elbow fittings,
The plastic pipes on both sides of the joint bent by using the two gripping portions not facing each other are fixed by the above fastening means, and when the cap joint is used, one gripping portion is used and the plastic pipe is used. Is protruded from the grip portion by an appropriate amount and is fixed by the fastening means.

In a clamp having four or more gripping parts, a T joint,
When used for elbow joints, socket joints, and cap joints, among the four or more gripping portions, one to three gripping portions are used, and the plastic pipe is used as one or two fastening means in the same manner as above. Secure it. When a joint for branching a plurality of plastic pipes is used, each plastic pipe branched at each gripping portion is fixed by the fastening means.

When using a clamp that has a storage part for the fitting, place the plastic pipe in the fitting part with the plastic pipe attached and set it in the fitting part of one metal fitting, or place the fitting first in the fitting part. After fitting in, insert the plastic pipe into the joint. In the latter case,
Since the plastic pipe can be fitted and inserted without holding the joint, the plastic pipe can be easily connected. After setting as described above, the other metal fitting is closed and the plastic tube is fixed at each gripping portion by the fastening means. The connector is then tethered and connected to the terminal of the fitting.

Embodiments FIGS. 1 to 5 show a clamp that can be used for an elbow joint, a T joint, a socket joint and a cap joint. The clamp 1 is divided into two parts, which are connected by a hinge 2 so that they can be opened and closed. In addition, the T-shaped joint 3 has an accommodating portion 4 into which the T-shaped joint 3 can be fitted with some play, and circular holes are formed at the left and right end portions and the end portion protruding from the intermediate portion. It has a grip portion 6. Each of the gripping portions 6 can hold and fix the plastic tubes 8 inserted into the joint 3 from three sides by closing the clamp 1 and screwing in the left and right knobs 7. The clamp 1 divided into two also has a long hole 9 in the center of one clamp piece 1a and the other clamp piece 1b.
Is formed with short holes 10 on both sides thereof, so that the terminal 11 of the joint 3 can project through the holes 9 and 10.

Figures 1 and 2 show an example of the use of a T-shaped joint. With the clamp 1 open, one clamp piece 1a or 1b is T-shaped.
The shaped joint 3 is set in a state in which the plastic pipe 8 is positioned and fitted and inserted from the three sides. Accordingly, each terminal 11 of the joint 3 is positioned at a position where it can be fitted into the long hole 9 and the short hole 10. After setting, the clamp 1 is closed, and both left and right knobs 7 are screwed in and fixed.

When using the elbow joint 14, as shown in FIG. 3, an elbow joint in which a plastic pipe 8 is inserted orthogonally is inserted.
14 is housed in the storage portion 4 (with this, the terminal 15 is positioned at a position where it can be fitted into the long hole 9 and one short hole 10 as in the case of the T-shaped joint), and the grip portions 6 on both left and right ends are held. One of the plastic pipes 8 and one of the holding parts 6 protruding in the middle part.
And hug and fix as described above.

FIG. 4 shows a usage example of the socket joint 17. That is, the socket joint 17 is housed in the storage portion 4 so that the terminal 18 can be fitted into both the short holes 10 and then the clamp 1 is closed. The plastic pipes 8 on both sides are fixed.

FIG. 5 shows an example of use of the cap joint 18,
A plastic pipe having a cap joint 18 accommodated vertically in the storage portion 4 so that the terminal 19 can be fitted into the long hole 9 and a cap joint 18 is attached to the pipe end by a grip portion 6 protruding in the middle. 8 is hugged and fixed.

FIG. 6 shows a clamp that can be used for an elbow joint, a socket joint, and a cap joint. A clamp 22 that is divided into two parts and that can be opened and closed by a hinge 21 has a substantially L-shaped storage portion 23 inside. Further, the right and left side ends and the end portion bent at a right angle are provided with gripping portions 24 which respectively form circular holes. Further, it further has a hook-shaped long hole 25 and a short hole 26 into which the terminals of the joint are fitted.

In this embodiment, the elbow joint 27 is fitted in the thin dash-dotted line position, the socket joint 28 is fitted in the thick dash-dotted line position, and the cap joint 29 is fitted in the two-dot chain line position.

Effect of the Invention The present invention is configured as described above and has the following effects.

The clamp according to claim 1 can be used as at least three kinds of joints of an elbow joint, a socket joint, and a cap joint, and the fastening means may be provided at one or two places, and each gripping portion. Since it is not necessary to provide it in the above, the structure is simplified, and the work for fixing or releasing the clamp can be performed easily and easily.

In the clamp according to claim 2, not only can it be used for a plurality of different types of joints, but also a plastic pipe can be inserted into the joint with the joint accommodated in the storage part, and the joint can be held at the time of insertion. Since it does not need to be provided, the work of connecting the plastic pipes can be easily performed, and the joint attached to the plastic pipes can be prevented from coming off.

According to the clamp of the third aspect, the fixing work of the plastic pipe is easy, and the plastic pipes having different diameters can be fixed.

[Brief description of drawings]

FIG. 1 is a plan view showing a state in which plastic pipes connected by a T joint are clamped, FIG. 2 is a side view of the clamp shown in FIG. 1, FIG. 3 is an elbow joint, and FIG. 4 is a socket joint. 5 is a front view of a clamp piece to which a cap joint is attached, and FIG. 6 is a front view of a clamp of another aspect. 1, 22 …… Clamp, 2, 21 …… Hinge 3 …… T-type joint, 4, 23 …… Storage part 6, 24 …… Grip part, 7 …… Knob 8 …… Plastic tube, 9, 25… … Long hole 10,26 …… Short hole, 11,15,19 …… Terminal 14,27 …… Elbow fitting, 17,28 …… Socket fitting 18,29 …… Cap fitting

Claims (3)

[Scope of utility model registration request] 1. A pair of clamp pieces, which are openably and closably connected by a hinge, and a plastic pipe which is integrally provided with the clamp pieces on both sides of the clamp piece so as to face each other with a constant gap therebetween, and which is inserted into both sides of a joint. A gripping portion that can be detachably fixed, and at least one grip that is integrally provided on the clamp piece and that is capable of releasably fixing plastic that is bent at an appropriate angle with the plastic tube and that is inserted into the joint. A clamp for an electrofusion joint, having a holding part and fastening means provided at one or two places for fastening the clamp pieces. 2. Each of the clamp pieces is provided with an accommodating portion for accommodating the joint, and the accommodating portion is provided with a housing corresponding to a terminal of the joint.
The clamp for an electrofusion joint according to claim 1, wherein a plurality of openings are provided. 3. The clamp for an electrofusion joint according to claim 1, wherein the gripping portion has one or several protrusions formed inside.