JP2003053840A - Method and apparatus for electric fusion-bonding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for electric fusion-bonding which prevents the deterioration of a resin and the lowering of fusion-bonding strength caused by repeated fusion by preventing repeated electric fusion-bonding even when the confirmation of the indicator pin of an electric fusion joint failed, and push button for starting fusion is operated. SOLUTION: A bar code 3 indicating information specific to the joint such as the serial number and brand of the joint is fitted to the joint 2. The information read from the bar code 3 is compared with registered information specific to the joint which is recorded in a memory 6. When the read information is in agreement with the registered information, a control means 8 outputs it to a buzzer to emit an alarm and to a monitor display 11 to indicate 'fusion- bonded' on its screen. Even when the push button 5 for starting fusion-bonding is operated in this state, a switch means 12 does not close a current supply circuit for fusion-bonding, and the fusion-bonding is not started. When the information read from the bar code 3 is not registered in the memory 6, the current supply circuit is closed by operating the button 5 to start the fusion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for electric fusion between a resin pipe and an electric fusion joint used for connecting resin pipes in piping work for resin pipes such as water and sewer pipes and gas pipes. .

[0002]

2. Description of the Related Art In recent years, resin pipes have become widespread in water supply and sewer pipes, gas pipes, etc., and electric fusion splicing joints are often used as joints for connecting pipes. When performing electric fusion with a resin tube using such an electric fusion joint, the connector of the electric fusion apparatus is inserted into the terminal of the joint and electricity is supplied.

Usually, the joint is provided with an indicator pin which is raised by the pressure of the molten resin at the fusion interface at the time of fusion, and the presence or absence of fusion can be confirmed by the indicator pin.

[0004]

The energization is usually started by pressing the fusion start button, but when the work is done, it leaves the work site for another purpose, and when it returns to the work site after it has been used, When a break is entered, or after the break, or another operator mistakenly neglects confirmation with the indicator pin, he or she may mistakenly recognize that the fusion is not yet performed and press the melting point start button. In this case, the fusion is performed twice, but if the resin which has been once heated and melted is heated again, the resin is deteriorated and the fusion strength is easily deteriorated.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide an electric fusing method and apparatus which prevent fusion from being performed again when fusion is completed.

[0006]

According to a first aspect of the present invention, after inserting a connector of an electric fusing device into a terminal of the electric fusing joint, the fusing start operation means is operated to energize the joint and the resin pipe. In the electric fusion method of performing electric fusion, the joint specific information for identifying the joint is read from the joint and input to the electric fusion device, and the electric fusion device has already registered the input joint specific information. It is determined whether or not it is registered, and if it is not registered, the energization is performed by the operation of the operation means, while if it is determined that it is registered, the energization does not start even if the operation means is operated. It is characterized by having done.

According to the present invention, it is possible to avoid the situation where fusion is repeatedly performed by always inputting the joint specific information to the electric fusion device before operating the operation means to start energization. A push button is usually used as the operation means of the present invention, but a keyboard, a mouse, or the like can also be used.

Further, as the unique information for specifying the joint, for example, serial No., serial No. and brand, caliber, etc. may be read by the operator directly by looking at the joint and input to the electric fusion bonding apparatus. However, preferably, the bar code attached to the joint is read by a bar code reader and then input to the electrofusion device. When reading the bar code with the latter bar code reader, it is necessary to record other joint information from the bar code, such as joint type, standard applied voltage, standard energization time, correction coefficient for outside temperature, etc. It is desirable to be informed.

According to a second aspect of the invention, in the invention according to the first aspect, when the electric fusion bonding apparatus determines that the input joint specific information has been registered, a display to that effect is displayed on the display means. It is characterized by having done. According to the present invention, it is possible to easily determine whether or not it has been registered, that is, whether or not it has been fused.

The display on the display means according to the present invention is performed by, for example, generation of a warning sound by a buzzer, lighting of a warning light, and display of characters and / or images on the monitor TV. This joint is already fused ". If the fusion has not been completed yet, for example, it is displayed whether or not the fusion is not yet performed by displaying “unfused” and the operator inputs the joint specific information and then watches the monitor TV. It is desirable to be able to know.

The invention according to claim 3 relates to an apparatus for carrying out the invention according to claim 1, which comprises a bar code reader for reading the joint specific information from the bar code attached to the joint and outputting it to the electric fusion bonding device. Switch means provided in the electric fusion device for opening and closing a supply circuit of a fusion current supplied to the joint, a memory for recording joint-specific information input from a bar code reader, and a joint input from the bar code reader Collating means for collating the unique information with the fitting unique information recorded in the memory, input from the collating means,
The control means controls the switch means based on an input from the operating means. According to the present invention, the control means controls the switch means to close the supply circuit and supply the welding current to the joint when there is an input from the matching means and the operating means.

According to a fourth aspect of the invention, in the invention according to the third aspect, a display means is provided, and as a result of the control means collating with the collating means, it is determined that the joint-specific information input from the bar code reader has been registered. Then, the fact is output and displayed on the display means.

The display means of the present invention includes, for example, a buzzer, a warning lamp, a monitor TV, etc., as described above. When registered, a warning sound is generated by the buzzer and a warning is displayed by lighting the lamp. Will be done. Also, the fused display is displayed on the monitor television as characters and images. Also in the case of unregistered, it is preferable to display unfused.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An electric fusing device 1 shown in FIG. 1 is a standard application of serial number, brand, diameter, type, and joint 2 of a joint 2 from a bar code 3 attached to an electric fusion joint 2. Bar code reader 4 for reading joint information such as voltage, standard energization time, and correction coefficient for outside air temperature, push button 5 as an operation means for starting fusion, and joint information read in the past by bar code reader 4 is recorded. Memory 6
And the joint information read by the barcode reader 4, the collating means 7 for collating the joint information recorded in the memory 6, the control means 8, and the joint read by the bar code reader 4 as a result of collation by the collating means 7. When the information coincides with the joint information recorded in the memory 6, the buzzer 9 for generating a warning sound and the display of fused or unfused by a character or an image by the output from the control means 8, a CRT or a liquid crystal display. It comprises a monitor television 11 including a screen, a matching means 7, a switch means 12 for closing a circuit for supplying a fusion current to the joint 2 by an input from the push button 5, and a power source 13 provided in the circuit. The memory 6, the collating means 7 and the control means 8 are constituted by a microprocessor, and the buzzer 9 and the monitor television 11 constitute display means.

The electric fusion between the electric fusion joint 2 and the resin pipe 14 is usually performed as follows. Resin pipe 14 for joint 2
After inserting the end portion of the pipe No. 1, the resin pipe 14 is clamped by a pipe gripper (not shown), and then the connector 15 of the electric fusion bonding apparatus 1 is inserted into the terminal 16 of the joint 2. After that, the barcode reader 4 reads the above-mentioned joint information of the barcode 3 attached to the joint 2. Serial N of the read joint information
The joint peculiar information such as o, brand, and caliber is collated with the joint peculiar information recorded in the memory 6 by the collating means 7, and if already registered, the control means 8 outputs to the buzzer 9 to generate a warning sound. At the same time, it is output to the monitor TV 11 to display "Fused" on the screen. Even if the push button 5 is operated to start fusion in this state, the control means 8 does not output to the switch means 12 for closing the fusion current circuit, and fusion is not started.

If the joint-specific information read from the bar code 3 is not registered in the memory 6, this joint-specific information is recorded in the memory 6. After that, when the push button 5 is operated to start fusion, the control means 8 outputs to the switch means 12, closes the fusion current supply circuit, and supplies the power 13
To the joint 2 to supply a welding current.

The energization time at this time is corrected by a correction coefficient corresponding to the outside air temperature obtained from a sensor (not shown) for detecting the outside air temperature in the joint energization information obtained from the bar code 3. The control means 8 outputs to the switch means 12 to open the fusion current supply circuit and stop energization after a lapse of the set time.

Although the figure shows the electric fusion between the socket type joint 2 and the resin pipe 14, the above description is also applied when the saddle type joint and the resin pipe are electrically fused such as a saddle joint and a service Qi joint. Electrofusion is performed in the same manner as in the case of socket type joints.

[0019]

According to the inventions of claims 1 and 3,
If the fitting-specific information is input to the electric fusing device before operating the operating means, even if the operation of starting the fusion by the operating means without confirming the indicator pin of the joint is performed, the fusion will be repeated. Therefore, it is possible to prevent the deterioration of the resin and the decrease in the fusion strength caused by the repeated fusion.

According to the inventions according to claims 2 and 4, it is possible to easily know whether or not the fusion has already been completed by watching and listening to the display.

[Brief description of drawings]

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

[Explanation of symbols]

1 ... Electrical fusion device 2 ... Electrical fusion joint 3 ... Bar code 4 ... Bar code reader 5. Push button for starting fusion 6 ... Memory 7..Verification means 8 ... Control means 9 ... Buzzer 11. Monitor TV 12..Switch means 13 ... Power supply 14 ... Resin tube 15 ... Connector 16 ... Terminal

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Claims (4)

[Claims] Claim: What is claimed is: 1. An electric fusion method, comprising: inserting a connector of an electric fusion device into a terminal of the electric fusion joint; then operating an operation means for starting fusion to energize the electric fusion joint to electrically fuse the joint and the resin pipe. In the method, the joint-specific information that identifies the joint is read from the joint and input to the electric fusing device, and the electric fusing device determines whether the input joint-specific information has already been registered,
If it is not registered, it is registered and the energization is performed by the operation of the operating means, while if it is determined that it is registered, the energization is not started even if the operating means is operated. An electric fusion method. 2. The electric fusion apparatus according to claim 1, wherein, when the electric fusion bonding apparatus determines that the inputted joint specific information has been registered, a display to that effect is displayed on the display means. Fusing method. 3. An apparatus for carrying out the electrofusion method according to claim 1, wherein a barcode reader for reading the joint specific information from the barcode attached to the joint and outputting the information to the electrofusion apparatus, and the electrofusion. The switch means for opening and closing the supply circuit of the fusion current supplied to the joint provided in the device, the memory for recording the joint specific information input from the bar code reader, and the joint specific information input from the bar code reader An electric fusing device comprising: collating means for collating with the joint unique information recorded in the memory; input from the collating means; and control means for controlling the switch means based on the input from the operating means. . 4. When a display means is provided and the control means collates with the collating means, and it is determined that the joint specific information input from the bar code reader has been registered, the fact is displayed on the display means. The electric fusion device according to claim 3, which is characterized in that.