JPH09123287A - Electrodeposition device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correct impressed voltage and time of turning on electricity through outside air temperature by providing a control part which corrects a controlled variable supplied to a heating element provided on the surface side of a joint member through the output of an outside air temperature decision part for deciding the outside air temperature by a detection signal sent from an outside air temperature sensor. SOLUTION: Pipe members 1, 1 and a joint member 2 are melt-stuck and joined by heat-generating action of a coilform heating element 3 provided on the inner peripheral face side of the joint member 2. Therein, AC voltage supplied from an external power source is converted into prescribed voltage through the voltage control part 5 of a control power source part 4 and supplied to the heating element 3 through the ready access terminals 7a, 7b. An outside air temperature decision part 12 decides the outside air temperature detected by a temperature sensor provided in a bar cord wand 15 and inputs outside air temperature correction information to a fusion sequence monitor part 10. Impressed voltage to be supplied and time of turning on electricity are decided from the outside air temperature correction information, standard impressed voltage and standard time of turning on electricity and commanded to a voltage control part 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric welding device for joining a pipe member and a joint member by welding.

[0002]

2. Description of the Related Art Conventionally, when a pipe member made of a thermoplastic material such as polyethylene is joined to a joint member, a heating coil is attached to the surface of the joint member which comes into contact with the pipe member, and an electric current is applied to the heating coil. There has been provided an electric welding device that heats and welds the joint portion between the joint member and the pipe member to a predetermined temperature by flowing the liquid (for example, Japanese Patent Laid-Open No. 58-131025).

[0003] In welding such a joint member and a pipe member, the welding condition varies depending on the size, type, and material of the joint member. Therefore, in order to obtain a predetermined welding strength, welding conditions must be changed. However, in the above-described conventional electric welding apparatus, the information indicating the energizing time is determined by a resistance previously incorporated in the joint member, and the determined information is sent to a controller that controls the welding condition. I have.

However, in the above-described conventional method of setting the energizing time using a resistor, the resistor must be incorporated at the time of producing each joint member, so that it is troublesome at the time of manufacturing, and the information that can be transmitted is only the energizing time. There is a problem that there is.

In order to solve this problem, a control amount or the like is coded, and the code is read by reading means provided in the electric welding device. Then, there has been proposed a configuration in which the setting of the control power supply is changed according to the content of the code.

[0006]

However, there is a problem that it is not possible to deal with welding conditions that cannot be coded, such as outside temperature.

[0007]

An electric welding device according to a first aspect of the present invention has been made to solve the above-mentioned problems, and in joining a pipe member and a joint member, A heating element provided on the surface side of the joint member that comes into contact with the joint member, a code that is attached to the joint member and indicates a control amount supplied to the heating element, a reading unit that reads the content of the code, and the heating element. An electric welding device having a control power source for changing the control amount supplied to the outside air temperature sensor in accordance with the content of the code, and an outside air temperature determination unit that determines the temperature of the outside air by an outside air temperature sensor and a detection signal from the outside air temperature sensor. And a control unit that corrects the control amount according to the output of the outside air temperature determination unit.

[0008] Further, an electric welding apparatus according to a second aspect of the present invention,
The outside temperature sensor of the first invention is provided in the reading means.

As the code, for example, a bar code is used. The contents of the code include a manufacturing place, a type of a joint, a joint size, a material of the joint, a standard applied voltage, a standard energizing time, and the like.

[0010]

Since the parameters required to obtain a predetermined welded state differ depending on the type, size, material, etc. of the pipe member and joint member, these attributes are represented by codes, which are read when welding work is performed. The control power supply tentatively determines the applied voltage to be supplied to the heating element and the energization time according to the content of this code.

Then, the temporarily set applied voltage and energizing time are corrected by the value of the outside air temperature.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of an electric welding apparatus according to the present invention, and FIG. 2 is an external view of the apparatus. In this electric welding device, each end of two pipe members 1 and 1 made of a thermoplastic resin such as polyethylene is connected from an opening at both ends of a joint member (socket) 2 made of the same thermoplastic resin such as polyethylene to an approximate center. An example is shown in which the pipe members 1 and 1 and the joint member 2 are welded and joined by the heat generated by a coil-shaped heater 3 provided on the inner peripheral surface side of the joint member 2. An AC voltage supplied from an external power supply such as an AC generator (not shown)
, And is supplied to the heater 3 via the connection terminals 7a and 7b. This connection terminal 7
a, 7b are the heaters 3 mounted in the joint member 2;
Are connected to the voltage application terminals 8a, 8b which are connected to the both ends 3a, 3b of the joint member 2 and are formed in a protruding shape on the outer peripheral surface of the joint member 2. A bar code 20 is mounted on the outer peripheral surface of the joint member 2 in the vicinity of the voltage application terminal 7a or 7b.
As shown in FIG. 6, information such as a maker code, types of joint members (types such as sockets and cheeses), sizes of joint members, materials of joint members, standard applied voltages, and standard energizing times are recorded. The information represented by the barcode 20 is read by a barcode wand (barcode reader device) 15 connected to the control power supply unit 4. In this example,
The information represented by the barcode 20 can be manually input by a key operation of an operation switch (not shown). As shown in FIGS. 4 and 5, the bar code wand 15 has a bar code reading sensor 21 and a temperature sensor 22 at a distal end portion 15a. Issue diode (L
It is configured by a light emitting element 21a such as ED) and a light receiving element 21b such as a phototransistor. The barcode wand 15 is provided with a start switch 23 for starting the operation of the control power supply unit 4. When the control power supply unit 4 does not use the bar code wand 15 and after the control power supply unit 4 starts operating, the bar code wand 15 has a bar code wand storage unit 24 ( (See FIG. 3). The voltage controller 5 includes a voltage control element such as a triac that controls the voltage applied to the heater 3 and the duration of energization in accordance with a control signal from the fusion sequence monitoring unit 10. The fusion sequence monitoring unit 10 is constituted by a microprocessor, sends an operation command of the voltage control unit 5, and fetches supply power information supplied through the voltage control unit 5. Further, in addition to the supplied power information, the fusion sequence monitoring unit 10 receives various types of information from the bar code determination unit 11, the outside air temperature determination unit 12, and the start / stop instruction unit 13. . That is, the barcode determination unit 11 determines the information read from the barcode 20 by the barcode wand 15 (such as a maker code, a type of a joint member, a size of a joint member, a standard applied voltage, a standard energizing time, and the like) and performs fusion. The outside air temperature judging unit 12 judges the outside air temperature provided by the bar code wand 15 and is detected by the temperature sensor 22 and inputs the same to the fusion sequence monitoring unit 10 as outside air temperature correction information. From the outside temperature correction information and the standard applied voltage and the standard energizing time, an applied voltage to be supplied and an energizing time are determined, and the voltage control unit 5
Command to. The start / stop instruction unit 13 is provided. An operation start instruction is issued by operating a start switch 23 provided on the barcode wand 15.
Give to. The start / stop instruction unit 13 is provided with a start switch 23 provided on the barcode wand 15.
Apart from this, ON / OFF control can also be performed by a start switch 25 and a stop switch 26 (see FIG. 2) provided on the display panel 4a of the control power supply unit 4. The information input from the voltage control unit 5, the bar code discriminating unit 11, and the outside air temperature judging unit 12 to the fusion sequence monitoring unit 10 is displayed on a display unit 16 composed of a cathode ray tube or the like as appropriate. 17
Is recorded. By printing by the printer 17, many fusion conditions can be recorded as one-to-one correspondence with the joint member 2. This printer 1
FIG. 7 shows an example of printing by No. 7. Next, a description will be given of a procedure for performing a welding operation of connecting a pipe member with a socket using the above-described electric welding apparatus. The joint member 2 is externally fitted to each end of the two pipe members 1 and 1 and attached thereto, and the connection terminals 7a and
7b is attached to the voltage application terminals 8a and 8b of the joint member 3. Thereafter, the bar code wand 15 is used to connect the joint member 2.
Read the barcode 20 attached to the outer peripheral surface of the. At this time, although not shown, when the control power supply unit 4 reads the correct information, the control power unit 4 notifies the operator of the confirmation signal by a vocal sound or the like. The operator confirms this and turns on the start switch 23 of the barcode wand 15 or the start switch 25 of the display panel 4 to start energizing the heater 3. The control power supply unit 4 controls the voltage control unit 5 according to the content of the code read from the barcode 20.
Thereby, even when the joint members 2 of different sizes and types are used, the welding operation of the pipe members 1 and 1 and the joint member 2 can be reliably performed. In the above embodiment,
An example of a socket is shown as the joint member 2. As the joint member, a pipe member such as a reducer, a cheese, a cap, an elbow, etc., which is fitted to an end of a pipe member and a saddle, a tapping saddle, a service tee, etc. The present invention can be similarly applied to a member that is pressed against the outer peripheral surface of the member and fused.

[0013]

As described above, according to the first aspect of the present invention, the control power source may be controlled according to the contents of the read code, so that welding can be performed reliably even when using joint members of different sizes and types. It can be carried out. Further, it is not necessary to process the joint member as in the related art, and much information can be transmitted.

Further, the applied voltage and the energizing time can be corrected depending on the value of the outside air temperature, so that a more stable and reliable welding operation can be performed.

According to the second aspect of the present invention, since the outside air temperature sensor is provided in the reading means, the temperature is not affected by the heating of the heating means provided in the joint member.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of an electric welding device according to the present invention.

FIG. 2 is an external view of an embodiment of an electric welding device according to the present invention.

FIG. 3 is a schematic diagram showing the arrangement of a barcode and a barcode reader device.

FIG. 4 is a perspective view showing the distal end portion of the barcode reader device together with the internal structure.

FIG. 5 is a perspective view showing the distal end portion of the barcode reader device together with the internal structure.

FIG. 6 is a diagram showing an example of information included in a barcode.

FIG. 7 is a diagram showing a print example of information read from a barcode and power supply information.

[Explanation of symbols]

 1 Pipe member 2 Joint member 3 Heater 4 Control power supply unit 15 Bar code wand 20 Bar code

Claims (2)

[Claims] 1. When joining a pipe member and a joint member, a heating element provided on the surface side of the joint member that comes into contact with the pipe member, and one attached to the joint member, which is supplied to the heating element. What is claimed is: 1. An electric welding device, comprising: a code indicating a control amount; a reading means for reading the content of the code; and a control power source for changing the control amount supplied to the heating element according to the content of the code, wherein An electric welding device comprising: an outside air temperature determination unit that determines the temperature of outside air based on a detection signal from the outside air temperature sensor; and a control unit that corrects the control amount based on the output of the outside air temperature determination unit. 2. The electric welding device according to claim 1, wherein the outside air temperature sensor is provided in the reading means.