JP2021032870A - Heating jig, and inspection method - Google Patents

Abstract

To improve the reliability of the inspection by enhancing the reproducibility concerning the temperature rise.SOLUTION: A heating jig 1 includes a first metal connection member and a second metal connection member that are brought into contact with each other on a current conduction circuit to conduct the current to heat the first connection member. The heating jig 1 includes a metal contact part 10 and a heater unit 11 for heating. The contact part 10 has a shape similar to the second connection member for allowing the same to come into contact with the first connection member. The heater unit 11 is formed integrally with the contact part 10.SELECTED DRAWING: Figure 1

Description

The present disclosure generally relates to heating jigs and inspection methods. More specifically, the present disclosure relates to, for example, a heating jig used for an inspection relating to heat, and an inspection method using the heating jig.

Patent Document 1 describes a first connection portion to which an electric wire from an external power source is electrically connected, and a second connection portion to which a plug provided in an electric wire from an electric device is detachably connected. The wiring device (outlet) to be provided is described. This outlet includes, for example, a temperature measuring unit attached to one or more of the first connection portion and the second connection portion, a blocking portion that electrically cuts off between the first connection portion and the second connection portion, and the like. It has.

When the outlet described in Patent Document 1 is determined to be abnormal based on the temperature detected by the temperature measuring unit, the contact is turned off at the blocking unit. Therefore, if the Joule heat generated at the contact part between the first connection part and the electric wire increases due to poor connection during construction or the influence of vibration applied during use, the measurement temperature of the temperature measuring part rises and the cutoff part The contacts can be turned off to cut off the power supply to the electrical equipment.

Japanese Unexamined Patent Publication No. 2016-58332

By the way, for an appliance having a function of detecting an abnormal temperature (a breaker, a terminal block, etc. may be a target in addition to the outlet) such as the outlet of Patent Document 1, for example, the temperature is measured after manufacturing and before shipping. It may be inspected whether the part operates normally. Here, in order to improve the reliability of the inspection, it is desired to reproduce a situation close to an abnormal temperature rise that may actually occur at the outlet.

The present disclosure has been made in view of the above reasons, and an object of the present invention is to provide a heating jig and an inspection method capable of improving the reproducibility of temperature rise and improving the reliability of inspection.

The heating jig according to one aspect of the present disclosure heats the first connecting member and the second connecting member made of metal, which are brought into contact with each other on a current energizing circuit to energize a current, on the side of the first connecting member. It is a heating jig for. The heating jig includes a metal contact portion and a heating heater portion. The contact portion has a shape imitating the second connecting member and is brought into contact with the first connecting member. The heater portion is integrally formed with the contact portion.

The inspection method according to one aspect of the present disclosure is for heating the side of the first connecting member and the second connecting member made of metal which are brought into contact with each other on the current energizing circuit to energize the current. This is an inspection method using a heating jig. The inspection method includes a first step and a second step. In the first step, a metal contact portion having a shape imitating the second connecting member of the heating jig is brought into contact with the first connecting member. In the second step, the first connecting member is heated by the heat from the heating heater portion formed integrally with the contact portion in the heating jig.

According to the present disclosure, there is an advantage that the reproducibility with respect to the temperature rise can be improved and the reliability of the inspection can be improved.

FIG. 1 is a perspective view of a heating jig according to an embodiment of the present disclosure. 2A is a front view of the heating jig of the same, FIG. 2B is a right side view of the heating jig of the same, FIG. 2C is a left side view of the heating jig of the same, and FIG. 2D is a left side view of the heating jig of the same. , It is the top view of the heating jig of the same as above. FIG. 3A is an external view showing an example of using the heating jig of the same, and FIG. 3B is a top view of an auxiliary plug used when using the heating jig of the same. FIG. 4A is a schematic view showing a connection state between the outlet and the plug in a normal state, and FIGS. 4B and 4C are schematic views showing a connection state between the outlet and the plug in an abnormal state. 5A to 5C are explanatory views for explaining an inspection method using a comparative example, and FIG. 5D is an explanatory diagram for explaining an inspection method using the same heating jig. FIG. 6 is an external view showing a modified example 1 using the same two heating jigs. FIG. 7 is a perspective view of a modification 2 of the same heating jig. FIG. 8 is an external view showing a usage example using two of the above modified examples 2. FIG. 9 is a schematic view of other modifications of the heating jig of the above. FIG. 10 is a schematic view of other modifications of the heating jig of the same.

(1) Outline FIGS. 1 to 10 described in the following embodiments are schematic views, and the ratio of the size and the thickness of each component in FIGS. 1 to 10 is not necessarily the actual dimensional ratio. Does not always reflect.

The heating jig 1 according to the present embodiment is the first in the metal first connecting member M1 and the second connecting member M2 which are brought into contact with each other on the current energizing circuit 500 (see FIG. 4A) to energize the current. This is a jig for heating the side of the connecting member M1. The heating jig 1 is, for example, a jig used for inspecting an outlet 2 (see FIG. 3A). Here, as an example, the first connecting member M1 is the blade receiving member 20 of the outlet 2 (see FIG. 4A), and the second connecting member M2 is the plug blade 50 of the plug 5 connected to the outlet 2 (see FIG. 4A). ).

The equipment to be inspected using the heating jig 1 is not limited to the outlet 2, and may be, for example, a breaker 7, a terminal block 8 (see FIG. 9), a table tap (not shown), or the like. However, it is desirable that the equipment to be inspected has a function of overheat detection (when an abnormal temperature rise is detected, a circuit break is executed).

The term "inspection" as used in the present disclosure means, for example, confirming whether or not a temperature detection unit having a temperature sensor (sensor element) or the like built in an instrument to be inspected such as an outlet 2 operates normally. is there. The "inspection" may or may not further include confirmation of whether circuit interruption is normally performed. Further, the "inspection" referred to in the present disclosure is not limited to the "(final) inspection" of the product at the time of shipment, but may also include the "inspection (evaluation)" of the developed product or prototype at the development stage. It may include "regular inspections" performed at the installation site.

Here, as shown in FIG. 1, the heating jig 1 includes a metal contact portion 10 and a heating heater portion 11. The contact portion 10 has a shape imitating the second connecting member M2 (blade blade 50) and is a portion that comes into contact with the first connecting member M1 (blade receiving member 20). The heater portion 11 is integrally formed with the contact portion 10.

According to this configuration, it is possible to reproduce a situation close to an abnormal temperature rise that may actually occur with an appliance such as an outlet 2. Therefore, it is possible to improve the reproducibility of the temperature rise and improve the reliability of the inspection.

(2) Details Next, the heating jig 1 and the inspection method according to the present embodiment will be described in more detail.

(2.1) Overall Configuration First, the overall configuration of the heating jig 1 will be described with reference to FIGS. 1 and 2A to 2D. As described above, the heating jig 1 includes a metal contact portion 10 and a heating heater portion 11, and the contact portion 10 and the heater portion 11 are integrally formed. The heating jig 1 is long as a whole and has a substantially rectangular parallelepiped shape. Further, the heating jig 1 further includes an electrical connection portion 13 and a mounting portion 14 (see FIG. 1).

The contact portion 10 and the heater portion 11 may be a single molded product formed integrally with each other, or the separately formed contact portion 10 and the heater portion 11 are fixed to each other by welding, screwing, caulking, or the like. It may be configured as one by being done.

The material of the contact portion 10 and the heater portion 11 is, for example, copper or a copper alloy in consideration of conductivity and thermal conductivity. It is desirable that the contact portion 10 and the heater portion 11, particularly the contact portion 10, are made of the same material as the second connecting member M2 (plug blade 50).

The contact portion 10 has a shape imitating the plug blade 50 (see FIGS. 4A to 4C) of the plug 5 which is the second connecting member M2, and contacts the blade receiving member 20 of the outlet 2 which is the first connecting member M1. It is a part to make it. In other words, the contact portion 10 has a shape imitating the flat blade of the plug plug standardized by JIS C 8303. The "mimicking shape" referred to in the present disclosure includes not only the concept of having the same shape and the same size as the plug blade 50, but also the concept of having the same shape (substantially the same shape) and substantially the same size to some extent. In the present embodiment, as an example, since the outlet 2 is a so-called A type outlet that is widely used in Japan, the contact portion 10 has a shape imitating the plug blade 50. However, when the outlet 2 is a B type or C type outlet, the contact portion 10 may have a shape imitating a round pin.

As shown in FIG. 1, the contact portion 10 is composed of a flat rectangular plate-shaped base portion 101 on the heater portion 11 side and a flat blade 102 protruding from the surface of the base portion 101. The flat blade 102 has a tip formed in an arc shape, imitating the plug blade 50, and has a through hole 103 near the tip side.

The heater portion 11 is a portion that is long and has a substantially rectangular parallelepiped shape. The contact portion 10 is provided so as to project on the first end surface 111 (left end surface in FIG. 1) of the heater portion 11 on the longitudinal axis (Axis) A3 (see FIG. 2D). Here, the heat source H1 of the heater unit 11 is, for example, a soldering iron (soldering iron) 3 (see FIG. 3A). The heater portion 11 has a receiving portion 12 (see FIG. 2B) into which the iron tip 30 of the soldering iron 3 is incorporated by insertion.

The receiving portion 12 is for fixing the internal space SP1 (see FIG. 2D) in which the iron tip 30 can be accommodated in the heater portion 11, the opening 120 for guiding the iron tip 30 to the internal space SP1 (see FIG. 2B), and the iron tip 30. It is composed of a screw hole 122 into which the screw 121 (see FIG. 3A) is inserted. The receiving portion 12 is a portion that is thermally coupled to the soldering iron 3.

The internal space SP1 is a cylindrical space, and its central axis (Axis) is formed so as to coincide with the longitudinal axis A3 of the long heater portion 11. As shown in FIG. 2B, the opening 120 is provided on the second end surface 112 (right end surface in FIG. 2A) of the longitudinal axis A3 of the heater portion 11 and has a circular opening region. The iron tip 30 can be inserted into the internal space SP1 from the opening 120. It is desirable that the inner diameter of the internal space SP1 is defined to be slightly larger than the outer diameter of the iron tip 30.

The screw hole 122 penetrates the heater portion 11 at a position slightly closer to the second end surface 112 on the peripheral surface 113 (upper surface in FIG. 1) so as to communicate with the internal space SP1. By screwing the screw 121 into the screw hole 122 with the iron tip 30 inserted in the internal space SP1, the tip of the screw 121 protruding from the screw hole 122 presses against the outer surface of the iron tip 30, and the iron tip 30 Is achieved. If the iron tip 30 is provided with a hole, the tip of the screw 121 protruding from the screw hole 122 fits into the hole, so that more stable retaining is achieved.

As shown in FIG. 1, the electrical connection portion 13 is configured as a screw hole 130 provided for energizing the contact portion 10 with an electric current. As shown in FIG. 3A, the electrical connection portion 13 is electrically connected to the load (resistive load) 4. The screw hole 130 is a hole (concave) that penetrates through the internal space SP1 at a position slightly closer to the first end surface 111 on the peripheral surface 113 (upper surface in FIG. 1) of the heater portion 11, but does not penetrate. Place). The electric wire S1 described later is connected by screwing the screw terminal 131 (see FIG. 3A) into the screw hole 130.

As shown in FIG. 1, the mounting portion 14 is configured as a screw hole 140 provided for mounting a temperature detecting element (not shown) such as a thermoelectric pair. The screw hole 140 is a hole (recess) formed on one side surface of the base portion 101 on the heater portion 11 side of the contact portion 10. The temperature detection element is fixed to the screw hole 140 using, for example, a screw (not shown). By fixing the temperature detecting element to the contact portion 10, the temperature of the contact portion 10 during the inspection can be measured. Since there may be a temperature difference between the temperature set by the temperature adjusting means on the soldering iron 3 side and the actual temperature of the contact portion 10, the temperature of the soldering iron 3 should be adjusted after grasping the temperature difference. It is desirable to adjust.

By the way, in the heating jig 1, as shown in FIG. 2D, the flat blade 102 of the contact portion 10 is inclined. Specifically, as shown in FIG. 2D, the contact portion 10 (flat blade 102) has an axis (Axis) A2, and the shaft A2 is a solder in which the iron tip 30 is incorporated in the receiving portion 12. It has a predetermined angle φ1 with respect to the longitudinal axis (Axis) A1 of the iron 3. Although the soldering iron 3 is not shown in FIG. 2D, the longitudinal axis A1 of the soldering iron 3 when the soldering iron 3 is incorporated in the receiving portion 12 is generally the longitudinal axis A3 of the heater portion 11. Match. Here, since the first end surface 111 of the heater portion 11 is inclined by an angle φ1 with respect to the second end surface 112, the contact portion 10 on the first end surface 111 has an angle φ1 with respect to the longitudinal axis A1. It is tilted. However, the contact portion 10 may be inclined by an angle φ1 with respect to the longitudinal axis A1 by bending near the root thereof. Since the heating jig 1 has such an inclined structure, interference such as contact of the heating jig 1 with other parts when the heating jig 1 is connected to the outlet 2 Can be prevented.

(2.2) Outlet Next, the outline of the outlet 2 will be described. The outlet 2 is, for example, a wiring device to which a plug 5 of an electric device (see FIG. 4A) is connected to supply electric power to the electric device, that is, an outlet. Two connection ports 22 (see FIG. 3A) are provided on the front surface of the housing of the outlet 2 so as to correspond to the two plugs 5. The two connection ports 22 are configured so that one plug 5 can be connected to each of them, and are arranged side by side in the vertical direction (vertical direction) on the front surface of the housing. In the outlet 2 of the illustrated example, one (lower) connection port 22 of the two connection ports 22 is an outlet with a 2-pole grounding electrode for AC 100V, and the other (upper) connection port 22 is. It is a 2-pole outlet for AC 100V without a grounding electrode.

After the manufacture and shipment of the outlet 2, the installation site of the outlet 2 becomes, for example, a residential facility such as a detached house or an apartment house, or a non-residential facility such as an office, a store, a school, or a nursing care facility. The outlet 2 may be installed on a construction surface such as a wall surface, a ceiling surface, and a floor surface in a facility (building), or may be installed outdoors. The outlet 2 is an embedded wiring device that is attached to the mounting frame of a large-angle continuous wiring device standardized by the Japanese Industrial Standards. A decorative plate 201 is attached to the mounting frame, and as shown in FIG. 3A, the outlet 2 is exposed from the inside of the decorative plate 201.

As described above, the outlet 2 is a so-called "outlet with an overheat detection function" having a function of executing a circuit cutoff when an abnormal temperature rise is detected. The outlet 2 is provided with a control unit having, for example, a microprocessor as a main configuration inside the outlet 2. The microcontroller realizes a function as a control unit by executing a program recorded in the memory of the microcontroller on a CPU (Central Processing Unit). The program may be pre-recorded in the memory, provided by being recorded in a non-temporary recording medium such as a memory card, or provided through a telecommunication line. In other words, the above program is a program for causing the microprocessor to function as a control unit.

Then, the control unit of the outlet 2 states that the temperature of the detection point detected by the temperature detection unit installed in the outlet 2 exceeds a threshold value (for example, set in the range of 130 ° C. to 140 ° C.). If it is determined, the switch inside the outlet 2 executes the circuit break. In addition, the indicator lamp lights up and the buzzer sounds to notify the surroundings of the occurrence of an abnormal temperature rise. Due to the abnormal temperature detection, the operating member (operating lever) 21 in front of the outlet 2 is in a state of popping forward. When the user performs a restoration operation on the operating member 21 after confirming the cause of the abnormal temperature rise, the opening / closing portion is switched from the shutoff state to the conductive state, and the outlet 2 is in a reusable state.

The temperature "detection point" is, for example, the lead plate inside the outlet 2, the blade receiving member 20, and the terminal member to which the power supply line PL1 on the AC power supply AC1 (see FIG. 3A) side such as a commercial power supply is connected. It is set to one of.

(2.3) Inspection Method Next, an example of an inspection method of the outlet 2 using the heating jig 1 will be described with reference to FIGS. 3A and 3B. Hereinafter, the inspection system 100 including the heating jig 1 and the soldering iron 3 will be referred to. As shown in FIG. 3A, the inspection system 100 includes a heating jig 1, a soldering iron 3, a cable 60 having an auxiliary plug 6 at the tip, a load 4, and an electric wire S1. Here, as an example, it is assumed that the inspection is performed after the outlet 2 is manufactured and before its shipment. Further, here, in order to reproduce a situation close to the environment in which the outlet 2 is actually installed, as shown in FIG. 3A, the outlet 2 is embedded and installed in the construction surface 200 of the wall material prepared for the test. Then the inspection is done. A feeder line PL1 connected to an AC power supply AC1 such as a commercial power supply is connected to a terminal member on the back side of the outlet 2.

The inspection procedure of the outlet 2 will be described below. However, the following procedure is not particularly limited. The inspection method in the present embodiment is an inspection method using a heating jig 1 for heating the blade receiving member 20 which is the first connecting member M1. That is, the temperature rise (abnormal or close to it) is simulated by heating from the heating jig 1, and the operation of the temperature detection unit in the outlet 2 is confirmed.

First, the iron tip 30 of the soldering iron 3 is inserted into the internal space SP1 through the opening 120 into the heating jig 1 and fixed with the screw 121. Further, the electric wire S1 to which the first terminal of the load 4 is connected is connected to the electric connection portion 13 of the heating jig 1. Specifically, by screwing the screw terminal 131 into the screw hole 130 with the mulberry-shaped or round terminal on the end side of the electric wire S1 sandwiched between the screw terminals 131, the electric wire S1 is connected to the electrical connection portion 13. Be connected. On the other hand, a cable 60 having an auxiliary plug 6 at the tip is connected to the second terminal of the load 4. Here, as shown in FIG. 3B, the auxiliary plug 6 is an inspection plug in which one of the pair of blades 61 is cut from the root and has only the other blade 61. ..

Then, the contact portion 10 having a shape imitating the plug blade 50 (second connecting member M2) in the heating jig 1 is brought into contact with the blade receiving member 20 (first connecting member M1) (first step). That is, the flat blade 102 of the contact portion 10 is inserted into the insertion port of one of the connection ports 22 (on the right side in the illustrated example) and brought into contact with the blade receiving member 20. At this time, the peripheral surface 113 of the heater portion 11 having the screw holes 122 and the screw holes 130 is connected so as to face upward.

Further, the plug blade 61 of the auxiliary plug 6 is inserted into the other (left side in the illustrated example) insertion port of the same connection port 22. In this state, an energization path including the electric wire S1, the load 4, and the cable 60 is established, and a current flows. That is, a situation close to the situation where the plug 5 of a general electric device is connected to the outlet 2 is simulated. In this energized state, for example, when a current of 15 amperes flows, the temperature inside the outlet 2 rises by about 20 ° C.

Subsequently, by turning on the power of the soldering iron 3, heat is transferred from the iron tip 30 to the heater portion 11 of the heating jig 1, and the heat from the heater portion 11 causes the blade receiving member 20 (first connecting member M1). Is heated (second step). The type of the soldering iron 3 is not particularly limited, and may be a nichrome heater type, a ceramic heater type, or a gas type in which a platinum catalyst is used. However, it is desirable that the soldering iron 3 has an adjusting means capable of adjusting the temperature thereof by the user. In other words, when the set temperature of the soldering iron 3 is appropriately changed to perform inspections (evaluations) for various temperatures, such an adjusting means is required.

Although detailed description will be omitted, the inspector confirms the operation of the temperature detection unit of the outlet 2 at the time of inspection by using, for example, a monitoring device. The monitoring device is connected to the outlet 2 so as to acquire a detection signal from the temperature detection unit of the outlet 2 and a control signal from the control unit of the outlet 2, and the inspector is detected by the temperature detection unit of the outlet 2. Monitor the temperature.

In this way, by performing the inspection using the heating jig 1, it is possible to reproduce a situation close to an abnormal temperature rise that may actually occur. Therefore, it is possible to improve the reproducibility of the temperature rise and improve the reliability of the inspection. Further, since the heater portion 11 has the receiving portion 12 into which the soldering iron 3 is incorporated, it is possible to improve the reliability of the inspection while having a simple structure.

In particular, the heating jig 1 includes an electric connection portion 13 to which the electric wire S1 is connected, and can reproduce a pseudo temperature rise while passing an electric current, so that the entire electric path in the outlet 2 due to energization is also warmed. .. In short, in the inspection, heat generation due to energization is also taken into consideration, and the reproducibility is further improved. Further, since the current path is established from the AC power supply AC1 by connecting the load (resistive load) 4, it is possible to easily reproduce the situation in which the actual electric device is connected.

In FIG. 3A, the heating jig 1 is connected to the right insertion port of the upper connection port 22, and the blade receiving member 20 behind the right insertion port is heated for inspection. However, after the inspection, the heating jig 1 may be connected to the outlet on the left side to perform the same inspection. Further, FIG. 3A shows a state in which the heating jig 1 and the auxiliary plug 6 are connected to the upper connection port 22 of the upper and lower connection ports 22 to perform an inspection. The upper connection port 22 After the inspection of the above, these may be connected to the lower connection port 22 to perform the same inspection. Further, in the pre-shipment inspection, the inspection may be completed by, for example, a temperature rise to around 80 ° C. without raising the temperature to a level exceeding a threshold value at which a circuit break is executed.

(2.4) Consideration with Comparative Examples Here, the heating jig 1 in the present embodiment and some comparative examples will be described with reference to FIGS. 4A to 4C and FIGS. 5A to 5D.

Hereinafter, the cause of the abnormal temperature rise that may occur at the outlet 2 will be described first.

FIG. 4A shows the connection state of the outlet 2 and the plug 5 in the normal state. In FIG. 4A, the plug blade 50 of the plug 5 is normally connected (contacted) to the blade receiving member 20, so that the current is normally energized on the current energizing circuit 500. Since the contact area is sufficiently large, the contact resistance is low, and it can be said that an abnormal temperature rise is unlikely to occur.

Next, FIG. 4B shows a state in which the blade receiving member 20 is deformed or damaged by repeatedly inserting and removing the plug 5 from the outlet 2 (without slipping) or due to abnormal overheating. If the plug 5 is connected in such a state of the blade receiving member 20, a sufficient contact area cannot be obtained, the contact resistance increases, and an abnormal temperature rise occurs in the blade receiving member 20, the plug blade 50, and the like. Can occur.

FIG. 4C shows a state in which a foreign substance N1 is present between the plug blade 50 and the blade receiving member 20. Examples of the foreign matter N1 include an oxide film, arc marks, dust and the like. If the plug 5 is connected in a state where the foreign matter N1 is mixed between the plug blade 50 and the blade receiving member 20, a sufficient contact area cannot be obtained, the contact resistance increases, and the blade receiving member increases. An abnormal temperature rise may occur at 20 or the plug blade 50 or the like.

On the other hand, FIGS. 5A to 5C show reproduction examples (comparative examples) in which the abnormal temperature rise is reproduced at the time of inspection.

FIG. 5A shows a first comparative example. In the first comparative example, a comparative plug blade X1 having a surface-processed jagged uneven surface is produced, and the comparative plug blade X1 is connected to the blade receiving member 20. That is, the first comparative example reproduces the situation of FIG. 4B described above. In this case, the current energization circuit 500 can be formed. However, in this first comparative example, it takes time and effort to perform surface processing. Further, when the comparative plug blade X1 is inserted, it is difficult to maintain the stability and durability of the jagged uneven portion. It just leaves it to the natural temperature rise. That is, it is difficult to control the temperature, and the inspection time may be long.

FIG. 5B shows a second comparative example. In the second comparative example, a resistor R1 such as carbon is interposed between the comparative plug blade X2 and the blade receiving member 20. That is, the second comparative example reproduces the situation of FIG. 4C described above. In this case, the current energization circuit 500 can be formed. However, in this second comparative example, the selectivity (resistance value, heat resistance, etc.) of the resistor R1 is not easy. In addition, it is difficult to maintain the stability and durability of the resistor R1. It just leaves it to the natural temperature rise. That is, it is difficult to control the temperature, and the inspection time may be long.

FIG. 5C shows a third comparative example. In the third comparative example, a nichrome wire X3 (for example, a diameter of 1 mm) whose tip is bent into an M shape is directly connected to the blade receiving member 20 instead of the plug blade. By energizing the nichrome wire X3 (see the dotted arrow), the blade receiving member 20 is heated. However, in this third comparative example, the nichrome wire X3 is inserted into the blade receiving member 20 as it is, and the insertion stability is poor. Further, unlike the first comparative example and the second comparative example, the current energization circuit 500 cannot be formed.

On the other hand, FIG. 5D shows a state in which the heating jig 1 in the present embodiment is connected to the blade receiving member 20. By using the heating jig 1, the insertion stability with the outlet 2 is higher than that in the first to third comparative examples. Further, unlike the third comparative example, the current energization circuit 500 passing through the load 4 can be formed. Further, the temperature can be easily controlled by the soldering iron 3. In particular, the heating jig 1 in the present embodiment has a great advantage that the temperature control and the energization can be controlled individually.

Further, among the heating jigs in the present disclosure, the portion to be brought into contact with the blade receiving member (for example, the comparative plug blade X1 shown in FIG. 5A, the comparative plug blade X2 shown in FIG. 5B, or the contact portion 10 shown in FIG. 5D) is , It is preferably formed of a metal material having a high electrical resistivity. If such a portion comes into contact with the blade receiving member, the heat generated by the plug blade itself is also added, and the amount of heat generated becomes larger, which is particularly effective when it is desired to increase the heat generation. Examples of the metal material having a high electrical resistivity include, but are not limited to, Ni-Fe or Mn-Ni-Cu.

(3) Modified Example The above embodiment is only one of various embodiments of the present disclosure. The above-described embodiment can be changed in various ways depending on the design and the like as long as the object of the present disclosure can be achieved. Hereinafter, modifications of the above embodiment will be listed. The modifications described below can be applied in combination as appropriate. In the following, the above embodiment may be referred to as a "basic example".

(3.1) Modification 1
Hereinafter, this modification (modification example 1) will be described with reference to FIG.

In the basic example, the outlet 2 is inspected by using the auxiliary plug 6 in addition to only one heating jig 1.

In the first modification, as shown in FIG. 6, the inspection system 100 is incorporated into another heating jig 1 and the other heating jig 1 instead of the cable 60 having the auxiliary plug 6. It is provided with one soldering iron 3. In other words, the inspection is performed using two heating jigs 1 and two soldering irons 3 incorporated in each. In FIG. 6, the two soldering irons 3, the load 4, the electric wire S1, etc. are not shown.

The two heating jigs 1 have the same structure as each other. Here, in the first modification, when the outlet 2 is connected to the connection port 22, when the outlet 2 is separated from the front surface, the ends of the heating jig 1 on the second end surface 112 side are separated from each other. (Connected in a V shape when viewed from above). In this illustrated example, the peripheral surface 113 having the screw holes 122 and the screw holes 130 of the heater portion 11 is connected to the insertion port on the right side so as to face upward, as in the basic example. On the other hand, the vertical orientation of the heating jig 1 is exchanged with respect to the insertion port on the left side, that is, the heating jig 1 has the screw hole 122 and the peripheral surface 113 having the screw hole 130 facing downward. Be connected.

According to the first modification, heat can be applied to each of the left and right insertion ports of the connection port 22, and a situation in which an abnormal temperature rise occurs in both the left and right blade receiving members 20 can be reproduced. Further, since two heating jigs 1 having the same configuration are used, it is possible to standardize the parts.

Further, since the temperature detection unit in the outlet 2 is provided on the back side of each of the left and right outlets, when one heating jig 1 is used as in the basic example, the temperature detection unit 1 is connected to each connection port 22. It is necessary to perform the inspection twice on the left and right. However, in the case of the first modification, one inspection can be performed on the temperature detection units at two locations on the left and right at the same time, and the inspection time can be shortened.

Further, when two heating jigs 1 are connected to the outlet 2 at the same time, they are connected in a V shape to suppress interference such as contact with each other. As a result, it is possible to suppress a decrease in electrical insulation between the two heating jigs 1.

When two heating jigs 1 are used in this way, the electric wire S1 is connected to the electric connection portion 13 in the heating jig 1 on the left side as well as the heating jig 1 on the right side described in the basic example. The load 4 is energized via the two electric wires S1.

(3.2) Modification 2
Hereinafter, this modified example (modified example 2) will be described with reference to FIGS. 7 and 8.

In the basic example, the heating jig 1 is connected to the blade receiving member 20 to heat the blade receiving member 20, and the contact portion 10 of the heating jig 1 is modeled after the blade 50. It was a shape.

The heating jig 1A in the second modification is connected to a terminal member (to which the feeder line PL1 is connected) on the back side of the outlet 2 to heat the terminal member side. Therefore, the contact portion 10A of the heating jig 1A has a shape that imitates the tip end portion (core wire) of the feeder line PL1 (see FIG. 7). In this case, the terminal member corresponds to the first connecting member M1, and the tip of the feeder line PL1 corresponds to the second connecting member M2. The terminal member is, for example, a plug-in type quick-connect terminal to which the feeder line PL1 is connected by inserting the core wire of the feeder line PL1.

The contact portion 10A of the heating jig 1A has a shape imitating the core wire of the feeder line PL1 which is the second connecting member M2. The contact portion 10A has, for example, a single wire (single core) 104 having a diameter in the range of 1.6 mm or more and 2.0 mm or less. The contact portion 10A is connected to the terminal member, which is a quick-connect terminal, by inserting the contact portion 10A from the insertion port on the back side of the terminal member.

In the second modification, by performing the inspection using the heating jig 1A, it is possible to reproduce a situation close to an abnormal temperature rise that may actually occur on the terminal member side. Therefore, it is possible to improve the reproducibility of the temperature rise and improve the reliability of the inspection.

By the way, as shown in FIG. 8, in the second modification as well, the two heating jigs 1A may be connected to the two terminal members, respectively, as in the first modification. In this case, the two heating jigs 1A each have the same structure as each other. In the second modification, when the outlet 2 is separated from the back surface, the ends of the heating jigs 1A on the second end surface 112 side are connected so as to be separated from each other (the shape of a C when viewed from above). Connected to). Even in this case, it is possible to reproduce the situation in which an abnormal temperature rise occurs in both the left and right terminal members. Further, since two heating jigs 1A having the same configuration are used, it is possible to standardize the parts. Further, since the two heating jigs 1A are connected in a V shape to suppress interference such as contact with each other, the electrical insulation between the two heating jigs 1A is ensured.

(3.3) Other Modifications In the basic example, the instrument to be inspected is the outlet 2, but as described above, the instrument is not limited to the outlet 2, and may be the breaker 7 or the terminal block 8 as shown in FIG. In this case, as shown in FIG. 9, the heating jig 1B may include a contact portion 10B composed of round terminals.

In the basic example, the number of receiving portions 12 of the heater portion 11 is one. However, a plurality of receiving portions 12 may be provided. The heater portion 11A of the heating jig 1C shown in FIG. 10 has two receiving portions 12 as an example. The heater portion 11A is formed in a substantially Y shape when viewed from above. In short, the heater portion 11A is shaped so as to be bifurcated in the direction away from the front surface of the outlet 2. Therefore, the heater portion 11A can incorporate the iron tips 30 of the two soldering irons 3 at the same time. In this case, for example, a rapid temperature rise can be reproduced in a short time, and the reproducibility of the temperature rise can be further improved.

In the basic example, the heat source H1 of the heater portion 11A is not provided by the heater portion 11A itself, but is a soldering iron 3 incorporated externally. However, the heater unit 11A itself may incorporate the heat source H1. The heat source H1 may be composed of a nichrome wire.

In the basic example, the inspection is described on the assumption that the inspection is performed before the manufacture and shipment of the outlet 2, but as explained in the column of “(1) Overview”, for example, the inspection may be performed at the installation site. That is, the inspection may be performed using the heating jig 1 with the outlet 2 embedded in the wall inside the building or the like. However, in this case, since it is difficult at the user level to heat the terminal member side as described in the modified example 2, it is preferable that the inspection of the terminal member is performed at a place other than the installation site.

When performing an inspection at the user level at the installation site, if it is difficult to monitor the temperature inside the outlet 2, for example, only the operation check of the circuit cutoff of the switch may be performed.

The surface of the contact portion 10 of the heating jig 1 in the basic example may be surface-processed with jagged irregularities as in the comparative plug blade X1 shown in FIG. 5A. Further, a resistor such as carbon may be provided on the surface of the contact portion 10 of the heating jig 1 in the basic example as in the comparative plug blade X2 shown in FIG. 5B.

(4) Advantages As described above, the heating jigs (1, 1A to 1C) according to the first aspect are first metal connections that are brought into contact with each other on the current energization circuit (500) to energize the current. In the member (M1) and the second connecting member (M2), heating is performed on the side of the first connecting member (M1). The heating jigs (1, 1A to 1C) include metal contact portions (10, 10A, 10B) and heating heater portions (11, 11A). The contact portions (10, 10A, 10B) have a shape imitating the second connecting member (M2) and are brought into contact with the first connecting member (M1). The heater portions (11, 11A) are integrally formed with the contact portions (10, 10A, 10B). According to the first aspect, it is possible to improve the reproducibility with respect to the temperature rise and improve the reliability of the inspection.

Regarding the heating jigs (1, 1A to 1C) according to the second aspect, in the first aspect, the heat source (H1) of the heater section (11, 11A) is preferably a soldering iron (3). The heater portions (11, 11A) preferably have a receiving portion (12) into which the iron tip (30) of the soldering iron (3) is incorporated. According to the second aspect, it is possible to improve the reliability of the inspection while having a simple structure.

Regarding the heating jig (1C) according to the third aspect, in the second aspect, the heater portion (11A) preferably has a plurality of receiving portions (12). It is preferable that a plurality of soldering irons (3) are incorporated into the plurality of receiving portions (12). According to the third aspect, for example, a rapid temperature rise can be reproduced in a short time, and the reproducibility of the temperature rise can be further improved.

Regarding the heating jigs (1, 1A to 1C) according to the fourth aspect, in the second or third aspect, the contact portions (10, 10A, 10B) have an axis (Axis) (A2). Is preferable. The shaft (A2) preferably has a predetermined angle (φ1) with respect to the longitudinal axis (Axis) (A1) of the soldering iron (3) in which the iron tip (30) is incorporated in the receiving portion (12). .. According to the fourth aspect, it is possible to prevent interference such as contact of the heating jigs (1, 1A to 1C) with other parts. Specifically, for example, when two heating jigs (1, 1A to 1C) are connected to the outlet (2) at the same time, the decrease in electrical insulation between the two heating jigs (1, 1A to 1C) is reduced. Can be suppressed.

The heating jig (1, 1A to 1C) according to the fifth aspect is an electrical connection for energizing the contact portion (10, 10A, 10B) in any one of the first to fourth aspects. It is preferable that the part (13) is further provided. According to the fifth aspect, the reproducibility with respect to the temperature rise can be further improved.

Regarding the heating jigs (1, 1A to 1C) according to the sixth aspect, in the fifth aspect, the electrical connection portion (13) is preferably electrically connected to the load (4). According to the sixth aspect, the reproducibility can be further improved.

Regarding the heating jig (1, 1C) according to the seventh aspect, in any one of the first to sixth aspects, the second connecting member (M2) is a plug connected to the outlet (2). The stopper blade (50) of (5) is preferable. According to the seventh aspect, it is possible to improve the reproducibility of the temperature rise that may occur in the outlet (2) and improve the reliability of the inspection.

The inspection method according to the eighth aspect is the first connecting member in the metal first connecting member (M1) and the second connecting member (M2) which are brought into contact with each other on the current energizing circuit (500) to energize the current. This is a method using a heating jig (1, 1A to 1C) for heating on the side of (M1). The inspection method includes a first step and a second step. In the first step, the metal contact portions (10, 10A, 10B) having a shape imitating the second connecting member (M2) in the heating jigs (1, 1A to 1C) are attached to the first connecting member (10, 10A, 10B). Contact with M1). In the second step, the heat from the heating heater portion (11, 11A) integrally formed with the contact portion (10, 10A, 10B) in the heating jig (1, 1A to 1C) causes heat. The first connecting member (M1) is heated. According to the eighth aspect, it is possible to provide an inspection method capable of improving the reproducibility with respect to the temperature rise and improving the reliability of the inspection.

The configuration according to the second to seventh aspects is not an essential configuration for the heating jigs (1, 1A to 1C), and can be omitted as appropriate.

1, 1A ~ 1C Heating jig 10, 10A, 10B Contact part 11, 11A Heater part 12 Receiving part 13 Electrical connection part 500 Current energization circuit 2 Outlet 3 Solder iron 30 Iron tip 4 Load 5 Plug 50 Plug blade A1 Longitudinal axis A2 Axis H1 Heat source M1 First connecting member M2 Second connecting member φ1 Predetermined angle

Claims (8)

A heating jig for heating the side of the first connecting member in a metal first connecting member and a second connecting member that are brought into contact with each other on a current energizing circuit to energize an electric current.
A metal contact portion that has a shape imitating the second connecting member and is brought into contact with the first connecting member.
A heater part for heating, which is integrally formed with the contact part,
To prepare
Jig for heating. The heat source of the heater portion is a soldering iron.
The heater portion has a receiving portion into which the tip of the soldering iron is incorporated.
The heating jig according to claim 1. The heater portion has a plurality of the receiving portions.
A plurality of the soldering irons are incorporated into the plurality of receiving portions.
The heating jig according to claim 2. The contact portion has a shaft whose tip has a predetermined angle with respect to the longitudinal axis of the soldering iron incorporated in the receiving portion.
The heating jig according to claim 2 or 3. An electrical connection portion for energizing the contact portion is further provided.
The heating jig according to any one of claims 1 to 4. The electrical connection is electrically connected to the load.
The heating jig according to claim 5. The second connecting member is a blade of a plug connected to an outlet.
The heating jig according to any one of claims 1 to 6. This is an inspection method using a heating jig for heating the first connecting member and the second connecting member made of metal, which are brought into contact with each other on the current energizing circuit to energize the current. hand,
The first step of bringing a metal contact portion having a shape imitating the second connecting member of the heating jig into contact with the first connecting member.
In the heating jig, the second step of heating the first connecting member by the heat from the heating heater portion integrally formed with the contact portion,
including,
Inspection methods.

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