JP2573748Y2 - Jig for joining fusion joints - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig for joining a fusion joint and a resin pipe.

[0002]

2. Description of the Related Art In general, when a resin tube is inserted into a fusion joint of a fusion joint and fusion-bonded, the fusion operation is performed by fixing a joint state between the fusion joint and the resin tube with a jig. Is being done.

Conventionally, as shown in FIGS. 6 and 7,
A fusion joint a before the fusion, and a fusion part b of the fusion joint a
In order to fix the joint state with the resin tube c inserted into the clamp body d, a receiving portion e in which the resin tube c can be arranged is formed in a substantially U-shaped splittable clamp body d, and the clamp f is clamped by a screw f. There is known a clamp device g configured to fix a resin tube c arranged in a receiving portion e by fastening a main body d (for example, see Japanese Utility Model Laid-Open No. 4-67028).

[0004] Further, assuming that the fusion work is performed without using such a jig, as shown in FIG. 8, a resin pipe c is inserted into a fusion portion i of a fusion joint h. It is known that a resin tube c is fastened and fixed by fastening portions j provided on both sides of a fitting portion i (for example, see Japanese Patent Application Laid-Open No. 4-19494).

[0005]

However, in the case of the above-mentioned conventional clamping device g, only the resin tubes c are fixed to each other.
Since the fusion joint a itself is not fixed and free, the gap between the fusion portion b and the resin pipe c is small at the upper portion and large at the lower portion due to the weight of the fusion joint a, and stable fusion strength is obtained. The inconvenience of not being able to do it arises. For this reason, as shown in FIG. 9, it has been proposed to fix the resin pipe c and the fusion part b of the fusion joint a into which the resin pipe c is to be inserted by the receiving part e. When fixing the attachment portion b, there is an inconvenience that the fixing force tends to vary. as a result,
If fusion is performed while the fusion portion b is excessively tightened, the fusion portion b is fused with a built-in distortion, and stable fusion strength cannot be obtained.

On the other hand, in the case of the fusion joint h having the above-mentioned conventional fastening portion j, the welding portion i is not excessively fastened, but the fastening portion j extending from the welding portion i is not tightened. Due to such a simple structure as fastening, a sufficient centering effect cannot be obtained, resulting in an inconvenience such that it is merely of the degree of retaining.

As shown in FIG. 9, when such a welding operation is performed, if the resin pipe c is not sufficiently inserted into the fusion joint a, a step k may be formed on the inner surface or the resin pipe c may have a step k. Since the molten resin may protrude in the portion, the resin pipe c is inserted up to the position m of the marked line previously written on the resin pipe c to perform the fusion work. However, on the other hand, when the resin tube c is fixed by the clamp device g or the like at the time of fusion, in order to obtain a sufficient centering effect, the portion of the resin tube c facing the end surface of the fusion portion b, that is, the marking line Is fixed by the receiving portion e, which causes a disadvantage that it is not possible to confirm whether or not the resin tube c is sufficiently inserted at the time of fusion.

The present invention has been made in view of the above circumstances, and provides a joining jig capable of fixing a fusion joint and a resin tube with a suitable fixing force, and a sufficient centering effect can be obtained. It is another object of the present invention to provide a joining jig that can prevent insufficient insertion of a resin tube.

[0009]

According to the present invention, there is provided a welding jig for solving the above-mentioned problems, which comprises a welding portion having a heat-generating coil embedded in an inner peripheral surface thereof. And a jig used when joining the resin tube and the resin tube. The fusion receiving portion is formed so as to match the outer peripheral surface of the fusion portion. In a state where the end of the resin pipe is inserted into the fitting part, the resin pipe receiving part is formed so as to match the outer peripheral surface of the resin pipe, and the fusion receiving part is provided on the fusion receiving part and / or the resin pipe receiving part. A fastening means for fastening the portion and the resin tube in a fixed state, and a fixing force managing means for managing the fixed state of the fusion receiving portion and / or the resin tube receiving portion by the fastening means.

In order to solve the above-mentioned problems, a welding jig of the present invention for joining a fusion joint includes a fusion joint having a fusion portion in which a heat-generating coil is embedded in an inner peripheral surface, and a resin pipe. Is a jig used when joining together, a fusion receiving portion formed so as to match the outer peripheral surface of the fusion portion, and a fusion receiving portion is connected or integrated with the fusion receiving portion, and a resin is attached to the fusion portion. With the end of the tube inserted, it matches the outer peripheral surface of this resin tube,
A resin pipe receiving portion formed along the end face of the fusion portion, and fastening means provided on the fusion receiving portion and / or the resin tube receiving portion for fastening the fusion portion and the resin tube in a fixed state. In the resin tube receiving portion, a window portion is provided at a portion along the end face of the fused portion so that the insertion mark of the resin tube inserted into the fused portion can be confirmed.

[0011]

According to the first aspect of the present invention, the fixing force managing means can keep the fixing force of the welding portion and the resin tube by the fastening means constant.

According to the second aspect of the present invention, the fusion tube and the resin tube receiving portion are fastened by the fastening means, and the window provided in the resin tube receiving portion with the fusion joint and the resin tube fixed. From the part, the insertion state of the resin tube inserted into the fusion part can be confirmed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

[0014]

Embodiment 1 FIGS. 1 to 3 show an outline of the entire structure of the joining jig 1, and FIG. 4 shows a state of use of the joining jig 1.

That is, the joining jig 1 is formed by a straight pipe 71.
One-sided straight pipe 7 having a fusion part 70 at the end thereof, and a resin pipe 8
The fusion receiving portion 2 and the resin pipe receiving portion 3 are connected by a connecting member 4, and the fusion receiving portion 2 and the resin pipe receiving portion 3 are provided respectively. The fastening member 5 can be fastened, and the fixing force of the fusion portion 70 and the resin tube 8 fixed by the fastening member 5 can be managed by the pressure-sensitive means 6.

The fusion receiving portion 2 is connected to a semicircular receiving member 21 by a hinge 22 and can be split into two. When the receiving member 21 is closed, the inner peripheral surface side of the receiving member 21 is formed so as to substantially match the outer peripheral shape of the fused portion 70. A flange 23 is provided at an end of the receiving member 21 on the side not connected by the hinge 22. Then, by fastening the fastening member 5 to the flange portion 23 and fastening the flange portions 23 to each other, the receiving member 21 is closed and the fused portion 70 is closed.
Is firmly fixed. Further, a window 20 is provided at a substantially central portion of the upper receiving member 21, and the pressure-sensitive means 6 is incorporated in the window 20.

Similarly to the fusion receiving portion 2, the resin tube receiving portion 3 is connected to a semicircular receiving member 31 by a hinge 32 and can be split into two. When the receiving member 31 is closed, the inner peripheral surface of the receiving member 31 is formed so as to substantially match the outer peripheral shape of the resin tube 8. In addition, hinge 3
The end of the receiving member 31 on the side not connected at 2 is provided with a flange 3
3 are provided. Then, the fastening member 5 is locked to the flange portion 33 to fasten the flange portions 33 to each other, so that the receiving member 3
The mold 1 is closed so that the resin tube 8 can be firmly fixed. Further, at a substantially central portion of the upper receiving member 31,
A window 30 is provided, and the pressure-sensitive means 6 is incorporated in the window 30.

The connecting member 4 connects the receiving member 21 above the fusion receiving part 2 and the receiving member 31 above the resin pipe receiving part 3 at two places. Similarly, the receiving member 21 on the lower side of the fusion receiving part 2 and the receiving member 31 on the lower side of the resin pipe receiving part 3 are respectively connected at two places. The connecting member is fixed such that the resin tube 8 can be fixed in a state where the resin tube receiving portion 3 is located along the end of the fused portion 70 while the fusion receiving portion 2 is fixed to the fusion portion 70. 4 lengths have been determined. For this reason, the connecting member 4 may be detachable so that it can be appropriately changed according to the length of the fused portion 70, or the connecting member 4 itself may have a telescopic function to adjust the length. May be made.

In this embodiment, the receiving members 21 and 31 are connected at a total of four places, two places. However, the fusion receiving section 2 and the resin pipe receiving section 3 are connected with stable rigidity. If it can be done, it is not particularly limited to the connection at four places. In addition, the receiving members 21 and 3 on the upper side of the fusion receiving portion 2 and the resin tube receiving portion 3 are determined in advance regardless of the connecting member 4.
1 and the lower receiving members 21 and 31 may be formed integrally with each other.

The fastening member 5 includes a bolt piece 51 and a fastening piece 52.
The bolt piece 51 is rotatably connected to the flanges 23, 33 of the lower receiving members 21, 31 respectively.
Then, after closing the upper receiving members 21 and 31, the bolt pieces 51 are rotated to thereby form the grooves 24 and 3 formed in the flange portions 23 and 33 of the upper receiving members 21 and 31.
4, the bolt pieces 51 are respectively positioned, and the fastening pieces 52 can be used for fastening from above. The fastening member 5 is connected to the lower receiving member 21 as in this embodiment.
It is not necessary to be connected to 31, but it may be a detachable one that is adapted to be locked and fastened to the flanges 23, 33 of the lower and upper receiving members 21, 31. In the present embodiment, the fastening member 5 is fastened to the flange 23 provided at one end of the receiving members 21 and 31. Member 21,
The flanges 23 and 33 may be formed on both sides of the base 31 and fastened by the fastening member 5. Further, in the present embodiment, the fastening members 5 are provided on the fusion receiving portion 2 and the resin tube receiving portion 3, respectively.
The fusion receiving portion 2 and the resin tube receiving portion 3 may be integrated and fastened by one fastening member 5.

The pressure-sensitive means 6 comprises a pressure-sensitive transparent body 61 and a pressure-sensitive tape 62. Of these, the transparent body 61 is provided with the windows 20, 3 provided in the receiving members 21, 31.
0 is incorporated. However, the transparent body 61 is provided on the receiving member 2.
When the fusion portion 70 and the resin pipe 8 are fixed by the first and the first members 31, they must be installed so as to receive a fixing pressure equivalent to the receiving members 21 and 31. This is, for example, the receiving member 2
Windows 20, 30 are formed in a tapered shape in which the diameter decreases from the inner surface to the outer surface of the first and 31, and a truncated quadrangular pyramid-shaped transparent body matching the windows 20 and 30 is formed in these windows 20 and 30. 61 can be incorporated by bonding. Examples of the transparent body 61 include those formed of various rigid resin materials and those formed of pressure-resistant glass.

On the other hand, the pressure-sensitive tape 62 is
Affixed to the inner surface of the The pressure-sensitive tape 62 is adhered so as to directly receive the fixing pressure when the fusion portion 70 and the resin tube 8 are fixed by the receiving members 21 and 31. That is, the pressure-sensitive tape 62 changes its color when a fixing force is applied.
The fixing state of the fusion parts 70 and the resin pipes 8 by the receiving members 21 and 31 can be managed by visually observing from the outside of the windows 20 and 30 through.

The number of the pressure sensing means 6 is not particularly limited, but may be any position at which the fixing pressure when fixing the fusion portion 70 and the resin pipe 8 by the receiving members 21 and 31 can be grasped. May be provided in several places. However, single receiving straight pipes 7 buried in the soil, such as gas pipes and water pipes
When the resin jig 1 and the resin tube 8 are fused, it is usual to check the fixing state of the joining jig 1 from above, so that the jig 1 is provided above the receiving members 21 and 31 as in the present embodiment. Is preferred.

In this embodiment, the pressure-sensitive means 6 constituted by the transparent body 61 and the pressure-sensitive tape 62 has been described. However, the present invention is not limited to this. Attach a torque limiter (not shown), etc., and fasten with a constant torque.
The fixing state may be managed by stopping the fixing by the first and the 31st.

According to the joining jig 1, even if the fused portion 70 is fixed, it is possible to prevent the fused portion 70 from being excessively fixed.
It is possible to avoid the fusion between the fusion portion 70 and the resin tube 8 in a state where the distortion is built in, so that stable and excellent fusion strength can be obtained. In addition, the fusion portion 70, which is a joining portion, and the resin tube 8 can be directly fixed to perform centering with high accuracy, and excellent construction accuracy can be obtained.

[0026]

Embodiment 2 This embodiment is shown in FIG.

The joining jig 1 of this embodiment is different from the joining jig 1 of the first embodiment only in the resin pipe receiving portion 3, so that only the differences will be described here, and the other explanation will be omitted. Omitted. The same members as those in the first embodiment are denoted by the same reference numerals.

That is, in the joining jig 1, the notch 35 is provided in the receiving member 31 on the upper side of the resin tube receiving portion 3, and the insertion mark 81 of the resin tube 8 at the time of fusion is attached to the resin tube receiving portion 3. It is made so that it can be visually confirmed from outside.

According to the joining jig 1, in a state where the resin tube 8 is fixed and centered, it is possible to check the inserted state of the resin tube 8 and perform a welding operation, and to achieve excellent fusion accuracy. As a result, it is possible to perform a stable fusion operation while preventing the occurrence of defects.

The number of the notches 35 is not particularly limited, and may be provided at several places on the outer peripheral portion of the resin tube receiving portion 3. However, when the resin receiving tube 8 and the single receiving straight tube 7 buried in the soil, such as a gas pipe and a water pipe, are fused, it is usual to check the fixing state of the joining jig 1 from above. It is preferable that the support member 31 is provided at an upper position of the receiving member 31 as in this embodiment.

The joining jig 1 provided with the notch 35 is not limited to the one described in the present embodiment, but fixes the insertion mark 81 of the resin tube 8 at the time of fixing. Such a notch 35 can be provided in various jigs as long as it is a jig.

Further, in the present embodiment, the insertion marking line 81 is confirmed by the notch portion 35. However, as long as the insertion marking line 81 can be confirmed, the insertion marking line 81 as in this embodiment is particularly used. It is not limited to the notch 35,
For example, in the case of a connection jig (not shown) formed such that the resin tube receiving portion 3 and the fusion receiving portion 2 are integrated and wrap the entirety of the fusion portion 70 and the resin tube 8, fusion is performed. A viewing window may be provided at the end of the portion 70.

[0033]

As described above, according to the first aspect of the present invention, the fixing force managing means can keep the fixing force of the fusion portion and the resin pipe by the fastening means constant. Can prevent the distortion from being incorporated in the fused portion, and a stable and excellent fusion strength can be obtained.
In addition, since the fused portion can be effectively fixed, excellent construction accuracy can be obtained due to the excellent centering effect originally obtained by fixing the fused portion.

According to the second aspect of the present invention, the insertion state of the resin pipe inserted into the fusion portion can be confirmed while the fusion joint and the resin pipe are centered and fixed. In addition, the centering of the fusion joint can be performed, and at the same time, the insufficient insertion of the resin pipe can be confirmed. As a result, excellent fusion accuracy can be obtained, and a stable fusion operation without occurrence of defects can be performed.

[Brief description of the drawings]

FIG. 1 is a side view schematically showing an overall configuration of a joining jig.

FIG. 2 is a plan view schematically showing an overall configuration of a joining jig.

FIG. 3 is a front view schematically showing the entire configuration of the joining jig.

FIG. 4 is a side sectional view showing a fusion state by a joining jig.

5A and 5B are a plan view and a side cross-sectional view illustrating a fusion state by a joining jig according to the second embodiment.

FIG. 6 is a perspective view showing a conventional joining jig.

FIG. 7 is a side sectional view showing a fusion state by a conventional joining jig.

FIG. 8 is a partially broken side view showing a fusion state by a conventional fusion joint.

FIG. 9 is a side sectional view showing another fused state by a conventional joining jig.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Joining jig 2 Fusion receiving part 3 Resin pipe receiving part 35 Notch part (window part) 5 Fastening member (fastening means) 6 Pressure sensing means (Fixing force management means) 7 One-sided straight pipe (fusion joint) 70 Fusion part 8 Resin tube 81 Insertion mark

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B29C 65/34 F16L 47/02

Claims (2)

(57) [Scope of request for utility model registration] 1. A jig used for joining a fusion joint and a resin pipe having a fusion portion in which a heat-generating coil is embedded in an inner peripheral surface, wherein the jig is provided on an outer peripheral surface of the fusion portion. A fusion receiving portion formed so as to match, and connected or integrated with the fusion receiving portion, and in a state where an end of the resin tube is inserted into the fusion portion, the fusion receiving portion matches the outer peripheral surface of the resin tube. And a fastening means provided in the fusion receiving part and / or the resin pipe receiving part for fastening the fusion part and the resin pipe in a fixed state, and a fusion receiving part and / or by this fastening means. A joining jig for a fusion joint, comprising: a fixing force managing means for managing a fixing state of the resin pipe receiving portion. 2. A jig used for joining a resin joint and a fusion joint having a fusion portion in which a heat-generating coil is embedded in an inner peripheral surface, wherein the fusion joint has an outer peripheral surface. With the fusion receiving portion formed so as to match, and being connected or integrated with the fusion receiving portion, with the end of the resin tube inserted into the fusion portion, it matches with the outer peripheral surface of the resin tube. A resin pipe receiving portion formed along the end face of the fusion portion, and fastening means provided on the fusion receiving portion and / or the resin tube receiving portion for fastening the fusion portion and the resin tube in a fixed state. In the resin tube receiving portion, a window portion is provided in a portion along an end surface of the fusion portion, so that an insertion mark of the resin tube inserted into the fusion portion can be confirmed. Jig for connecting fusion joints.