JPH079568A - Terminal adapter for fusion-bonding joint - Google Patents

Abstract

PURPOSE:To simplify a manufacturing operation, to prevent a mounting mistake, to facilitate a quality control and packaging, to reduce a cost and to improve its general purposes. CONSTITUTION:When a fusion-bonding joint is energized, a terminal adapter B for the joint is interposed between a device of a power source side and the joint, an adapter body 5 of the adapter B for the joint is so constructed that a main member 51 and a sub-member 52 are slidable and an interval between a connector 71 for a first joint and a connector 782 for a second joint to connect the terminal of the joint is changeable. Further, when the interval is set to an interval responsive to type of the joint, a variable resistor to become a resistance value for indicating the type is provided in a parallel circuit for connecting the connector 72 to a connector 82 for a second power source.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to a fusion joint made of a thermoplastic resin used for connecting a vacuum sewer system or a pipe for gas or water supply when energizing a heating element for melting at the time of connection. Regarding the terminal adapter to do.

[0002]

2. Description of the Related Art Generally, a fusion splicer has a structure in which a heating coil is embedded in a cylindrical sleeve. Thermoplastic resin pipes are inserted from both ends of this sleeve (joint body), and the heating coil is energized in this state. Then, after melting the inner circumference of the sleeve and the thermoplastic resin tube, the thermoplastic resin tubes are connected by cooling and hardening. By the way, in the fusion splicing, if the number of turns or the diameter of the heating coil is different due to the difference in the bore or length of the sleeve depending on the product type, the optimum energizing time is also different. Therefore, when fusing, the energization time must be changed according to the product type.

Therefore, in order to find out the optimum energization time according to the product type, there is one in which a resistance for identification is provided in parallel in the circuit for energizing the heating coil. That is, if the resistance value of the resistance for identification is made to differ depending on the type of the fusion splicing joint, the type can be known by checking the resistance value when the fusion control device is energized, and the optimal energization time can be determined accordingly.

As a fusion-bonding joint provided with the above-mentioned resistance for identification, for example, one described in Japanese Patent Laid-Open No. 2-129493 is known. In this fusion splicer, cylindrical main contact pins connected to the heating coil are erected on terminals provided at both ends of the joint body, and inside the main contact pins are insulated from the main contact pins. And a resistance pin connected to the heating coil,
On the upper side of the resistance pin, the auxiliary contact pin is erected so as to be connected to the resistance pin and fitted in the inner circumference of the main contact pin in an insulated state.

Therefore, when the heating coil is energized from the fusion control device through both contact pins of the terminal, the fusion control device identifies the optimum time for energizing the heating coil by the resistance value of the resistance pin. The optimum fused state can be obtained by energizing according to the time.

[0006]

However, in the above-mentioned conventional device, since the terminal portion of the fusion splicing has a structure in which the resistance pin and the auxiliary pin are screwed into the main contact pin, Had a problem to enumerate.

Since the resistance pin corresponding to the fusion joint is screwed into the terminal of each fusion joint, it takes a lot of time to manufacture, there is a possibility that the resistance pin may be attached incorrectly, and quality control becomes complicated. .

If the resistance pin projects from the terminal of the fusion splicer, it is difficult to package the product.

Since the resistance pin is provided for each of the fusion-bonded joints, the cost per fusion-bonded joint becomes high. Moreover, since it is necessary to perform processing so that each pin can be attached to the terminal portion of the fusion-bonded joint, a normal fusion-bonded joint cannot be used as it is.

The present invention has been made by paying attention to the above-mentioned conventional problems, and simplifies the manufacturing work, prevents the occurrence of mounting errors, facilitates quality control, facilitates packaging, reduces costs,
The purpose is to improve versatility.

[0011]

In order to achieve the above-mentioned object, in the present invention, when a heating element embedded in the inner peripheral portion of a joint body made of a thermoplastic resin is energized, it is connected to the heating element. A terminal adapter for fusion splicing that is used by connecting to two terminals has been proposed, and the terminal adapter for fusion splicing is a pair of first coupling connector and second coupling that are formed so as to be connectable to the terminals. Power supply connector, a first power supply connector and a second power supply connector that are respectively connected to the joint connectors via connection circuits and are connectable to the power supply side connection terminals, and the first and second power supply connectors. A first electrode and a second electrode provided on any one of the power supply connectors, and a parallel circuit formed in a connection circuit by connecting these two electrodes and one joint connector, An adapter main body that supports each connector and a connection circuit, the adapter main body including a first support and a second support slidably provided with respect to the first support, One of the first and second joint connectors is arranged on the first supporting body, while the other joint connector is arranged on the second supporting body so that the distance between the two can be changed. One of the parallel circuits has a variable resistance set to have a predetermined resistance value indicating the kind of fusion-bonding joint according to the relative position between the first support and the second support. The configuration is provided.

[0012]

When the fusion joint is energized, the fusion joint terminal adapter of the present invention is interposed between the fusion joint and the power source side such as the fusion control device. That is, the first and second joint connectors of the adapter of the present invention are connected to the terminals of the fusion joint, while the first and second power connectors are connected to the connection terminals of the fusion control device, respectively. . When connecting the connectors for both joints to the terminals of the fusion splicing joint, the distance between the terminals varies depending on the type of the fusion splicing joint. In this case, the first support body and the second support body of the adapter body are Sliding them relative to each other so that the distance between the connectors for both joints corresponds to the distance between the terminals.

When both supports are slid in correspondence with the distance between the terminals of the fusion joint, the resistance value of the variable resistor provided in the adapter body changes in accordance with the slide, and the kind of the fusion joint is changed. Is a resistance value.

Therefore, if power is supplied from a power source such as a fusion control device to the terminal of the fusion joint via the fusion joint terminal adapter of the present invention, the resistance value of the variable resistance causes the fusion joint to be energized to The type of product is known, and energization can be performed for an optimal energization time according to this type of product.

[0015]

Embodiments of the present invention will be described with reference to the drawings. In describing the examples, first, the fusion splicing joint A will be described. As shown in FIG. 2, this fusion splicing joint A is a socket for fusion splicing with the end portions of the thermoplastic resin pipes P1, P2 inserted into the open ends 11, 12 of the joint body 1 formed in a cylindrical shape. It is a fusion-bonded joint. The joint body 1
Is made of a thermoplastic resin such as polypropylene resin, polyethylene resin, vinyl chloride resin, or polybutene resin by injection molding, for example, and the heating coil 2 as a heating element is embedded spirally in the inner peripheral portion. ing. The heating coil 2 includes a nichrome wire, a copper / nickel alloy wire, a manganese / nickel alloy wire, a chromel wire,
It can be composed of iron / chromium wire, iron-chromium wire, etc. for general resistance.

Further, the joint body 1 is provided with each open end 1
In the vicinity of 1 and 12, cylindrical terminals 4 and 4 respectively connected to the heating coil 2 are provided. A screw thread 4a is formed on the inner peripheral surface of the terminal 4.

A terminal adapter (hereinafter, simply referred to as an adapter) B for fusion splicing according to an embodiment of the present invention melts the inner peripheral portion of the joint body 1 and the thermoplastic resin pipes P1 and P2 inserted into the joint body 1. Heating coil 2 to wear
It is used by connecting to the terminal 4 when energizing.

FIG. 1 is a perspective view showing an adapter B of the embodiment. The adapter B is provided with an adapter body 5 having a substantially rectangular parallelepiped shape, and one pair is provided on each of the upper surface and the lower surface of the adapter body 5 in the figure. The connector 71 for the first joint, the connector 72 for the second joint, the connector 81 for the first power supply, and the connector 82 for the second power supply are provided.

Each of the joint connectors 71, 72 has a bottomed cylindrical electrode 71a, 72a connectable to the terminals 4, 4 of the joint body 1, respectively. And the first
An elongated hole 71b is provided on the side surface of the electrode 73 of the joint connector 71 (see FIG. 3), and the elongated member 71b is formed with an engaging member that is engageable with the screw thread 4a of the terminal 4. 6a is provided so that it can appear and disappear.

Further, the power supply connectors 81 and 82 are cylindrical bosses 83 and 83, respectively, which are connectable to the cylindrical connection terminals of the fusion control device (not shown), and the circles erected inside thereof. It has columnar terminals 84 and 85. The terminal 84 of the first power supply connector 81 is composed of one electrode, but the terminal 8 of the other second power supply connector 82 is
As shown in the cross-sectional view of FIG.
The electrode 85a and the second electrode 85c provided inside the electrode 85a with the insulating member 85b interposed are formed in a double structure. That is, the power supply connectors 81 and 82 are connected to the corresponding joint connectors 71 and 72, respectively.
Although connected via (FIG. 5), the double power supply connector 82 and the corresponding second joint connector 72 are connected in parallel as shown in FIG. A circuit 9a is provided.

A variable resistor 10 is provided in the middle of the parallel circuit 9a. As described above, the connection circuit 9,
The parallel circuit 9a and the variable resistor 10 are provided inside the adapter body 5, and the configuration thereof will be described below.

The adapter body 5 is composed of a main member (first support) 51 on the left side in FIG. 1 and a sub member (second support) 52 on the right side in the figure, and the sub member 52 is
The main member 51 is slidably supported in the direction of the arrow LR in the figure. Further, a detachable button 6 is provided between the two members 51 and 52 at a substantially central portion of the adapter body 5. 3 shows a side surface of the main member 51 and the detachable button 6 on the right side, and a sectional view corresponding to the side on the left side of the figure. As shown in the sectional view of FIG. , Which are integrally formed with the engaging member 6a, are formed to face each other, and a spring 6b that urges outwardly between the two detachable buttons 6 and the positions of the detachable buttons 6 are regulated. A positioning rod 6c is provided. Therefore, when the attaching / detaching buttons 6 and 6 are pressed, the engaging members 6a and 6a retract into the inside of the first joint connector 71 and do not engage with the thread 4a of the terminal 4 of the fusion splicing joint A. Then, when the detachment button 6 is released, the engaging members 6a, 6a are moved by the urging force of the spring 6b into the elongated holes 71b of the first joint connector 71.
71b.

Further, the variable resistor 10 is provided inside the adapter body 5 above the detachable button 6. That is, the variable resistor 10 is provided integrally with the main member 51 and extends inside the adapter body 5 in parallel with the arrow LR direction.
a and the rod electrode 10b and the sub-member 52 are integrally provided, supported slidably with respect to the slide member 10a, and lead wire 9 with respect to the first electrode 85a.
1 is provided with a slide electrode 10c connected by 1 and a plurality of resistors 10d, 10e, 10f which are bridged between the slide support 10a and the rod electrode 10b.
0b is connected to the second electrode 85c via a lead wire 92 and is also connected to a second joint connector 72 (not shown) via a lead wire 93.

In each of the resistors 10d to 10f, the connectors 71 and 72 for both joints are connected to the terminal 4 of the fusion joint A.
When the main member 51 and the sub member 52 are relatively slid to a predetermined position in accordance with the distance between the terminals 4 and 4 in order to connect them to the No. It is arranged so that the slide electrode 10c according to the type of the fitting A and the slide electrode 10c are connected. That is, the distance between the terminals 4 and 4 of the fusion spliced joint A is arranged differently depending on the product type, and each resistor 10d to 10f is arranged.
Are set to different resistance values indicating the type of fusion splicing A.

Next, the procedure for energizing the fusion splicing joint A will be described. First, the joint connectors 71 and 72 of the adapter B are connected to the terminals 4 and 4 of the fusion splicing joint A. In this connection, the distance between terminals 4 and 4 is
It differs depending on the type of fusion splicing joint A. In this case, the main member 51 and the sub-member 52 of the adapter body 5 are slid relative to each other so that the distance between the connectors 71 and 72 for the joints is the distance between the terminals 4 and 4. To match.

As described above, when the main member 51 and the sub member 52 are slid in correspondence with the fusion splicing joint A, in the variable resistor 10 provided in the adapter body 5 shown in FIG. 4, the slide electrode 10c slides. The variable resistance 10 is slid with respect to the member 10a and connected to predetermined resistors 10d to 10f, and the resistance value of the variable resistor 10 becomes the resistance value indicating the type of the fusion splicing joint A that is connected.

Then, by connecting the respective power supply connectors 81 and 82 to the connection terminals of the fusion control device (not shown) and energizing the fusion control device through the adapter B to the terminal of the fusion joint A, From the resistance value of the variable resistor 10, it is possible to know the type of the fusion joint A to be energized, and it is possible to energize for an optimal energizing time according to this type.

As described above, in this embodiment,
When energizing the fusion joint A from the fusion control device, the adapter B is interposed between the two, and the fusion control device provides the adapter B with a resistance necessary for optimally controlling the energization time. The resistance for controlling the energization time is a fusion splicing joint A
It is not necessary to provide the joint body 1 of the above.

Therefore, it is not necessary to screw the resistance pin into the terminal at the time of manufacturing the fusion spliced joint A. As a result, the manufacturing work can be improved, there is no risk of mounting error, and the quality control is easy. The effect is obtained.

Further, since the resistance pin is not required in the fusion joint A, the cost can be reduced and the packaging can be facilitated. Moreover, the fusion joint A itself is not modified. Since it does not exist, it is possible to control the fusion time by using an ordinary fusion joint as it is, and it is possible to obtain the effect of increasing versatility.

Although the embodiment has been described above, the specific configuration is not limited to this embodiment, and even if there is a design change or the like within a range not departing from the gist of the invention, the invention is included. For example, in the embodiment, together with the first and second joint connectors 71 and 72, the first and second power supply connectors 8 are provided.
Although the distance between the power supply terminals 1 and 82 is also changed, the power supply connectors 81 and 82 may be provided on the main member 51 so that the distance between them is constant.

Further, in the embodiment, the first joint connector 7
1 is an engaging member 6a that engages with the thread 4a of the terminal 4.
However, such an engaging member 6a does not necessarily have to be provided, and the shape thereof is not limited to that shown in the embodiment. For example, the engaging member 61 shown in FIG. It may be formed in a tapered shape as described above. In this case, the terminal 4 is also provided with a protrusion that engages with the engaging member 61 near the open end thereof.

Further, in the embodiments, the heating coil is shown as the heating element, but this heating element is a net-like one as long as it can generate heat when energized to melt the fusion joint and the resin pipe. You may use things other than a coil.

[0034]

As described above, in the present invention, when the fusion joint is energized, the fusion joint terminal adapter is interposed between the power supply side device and the fusion joint. The terminal adapter for the fitting is provided with a variable resistor for controlling the energization time, and further, the variable resistor is
When the distance between the first and second connectors of the fusion splicing terminal adapter to be connected to the fusion splicing terminal is set according to the type of fusion splicing, the resistance value indicating that type is obtained. Since it is configured, it is not necessary to provide a resistance for controlling the energization time in the fusion splicing, and the effects listed below can be obtained.

B) Since the resistance pin is not necessary, the cost can be reduced and the packaging becomes easy.

(B) In the manufacturing process of the fusion splicer, the work of providing the resistance pin on the fusion splicer is not required. As a result, the manufacturing work can be improved, and the risk of installation error is eliminated.
Quality control becomes easy.

C) Since it is not necessary to modify the fusion splicing itself, the fusion splicing time can be controlled by using the ordinary fusion splicing as it is, and the versatility is enhanced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a terminal adapter for fusion splicing according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a fusion splicing joint.

FIG. 3 is a cross-sectional view and a side view showing a main part of the embodiment adapter.

FIG. 4 is a cross-sectional view showing the main parts of the embodiment adapter.

FIG. 5 is a circuit diagram showing a circuit configuration of a main part of an embodiment adapter.

FIG. 6 is a cross-sectional view showing another example of the first joint connector.

[Explanation of symbols]

 A fusion-bonded joint 1 joint body 2 heating coil (heating element) 4 terminal B fusion-bonded terminal adapter 5 adapter body 51 main member (first support) 52 sub-member (second support) 71 first joint connector 72 Second Joint Connector 81 First Power Supply Connector 82 Second Power Supply Connector 84 First Electrode 85 Second Electrode 9 Connection Circuit 9a Parallel Circuit 10 Variable Resistance

Claims (1)

[Claims] 1. A terminal adapter for a fusion splicer, which is used by connecting to two terminals connected to a heating element when energizing the heating element embedded in the inner peripheral portion of a thermoplastic resin joint body. And a pair of first joint connector and second joint connector formed so as to be connectable to the terminal and each joint connector via a connection circuit, respectively, so that they can be connected to a connection terminal on the power supply side. The formed first power supply connector and second power supply connector, the first electrode and the second electrode provided on either one of the first and second power supply connectors, and a joint of these two electrodes and one A parallel circuit formed by connecting a connector for connection to a connection circuit, and an adapter body that supports each connector and the connection circuit, wherein the adapter body includes a first support body, A second support body slidably provided with respect to the first support body, and one of the first and second joint connectors is arranged on the first support body while the other one is arranged. A joint connector is arranged on the second support so as to be able to change the distance between the two, and one of the parallel circuits has one of the connectors depending on the relative position of the first support and the second support. A terminal adapter for a fusion splicer, which is provided with a variable resistor set to have a resistance value indicating a predetermined type of fusion splice.