JP4944573B2 - ELECTRO FUSION DEVICE AND METHOD OF JOINING ELECTRO FUSION FITTING AND RESIN TUBE USING ELECTRO FUSION DEVICE - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric fusion-bonding device with such function that when a fusion-bonding power value for entered fusion-bonding conditions exceeds the allowable power of a fusion-bonding power supply part, the operation can be controlled so as not to allow the initiation of a supply of fusion-bonding power to an electric fusion-bonding joint from the fusion-bonding power supply part, and thereby, a joint failure between the electric fusion-bonding joint and a resin tube due to the supply of unstable fusion-bonding power, can be eliminated and further such function that the trouble with the fusion-bonding power supply part, an electronic circuit of the device interior etc. due to power oversupply, can be restrained. <P>SOLUTION: This electric fusion-bonding device comprises the fusion-bonding power supply part 11 for supplying fusion-bonding power, an input means 121 for receiving the entry of fusion-bonding conditions setting information and a control part 12 for controlling the fusion-bonding power supply part 11 based on the fusion-bonding conditions setting information received by the input means 121. When it is decided by the control part 12 prior to the start of fusion bonding that the fusion-bonding power value of the fusion-bonding conditions setting information exceeds the allowable power value of the fusion-bonding power supply part 11, the operation is controlled so as not to allow the start of supplying the fusion-bonding power to a heater from the fusion-bonding power supply part 11. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

The present invention relates to an electric fusion apparatus used when bonding resin pipes with an electric fusion joint, and a method for joining an electric fusion joint and a resin pipe using the electric fusion apparatus .

  When joining resin pipes used for water pipes and gas pipes, an electric fusion joint may be used. In the electric fusion joint, a heater is embedded in a receiving port into which a resin tube is inserted. By supplying power to the heater to generate heat, the resin on the inner surface of the receiving port and the outer surface of the end of the resin tube is melted. It is to be joined. Since joining using such an electric fusion joint can integrate a resin pipe and a pipe joint, high joint strength can be obtained.

  The electric fusion apparatus used for this fusion bonding is to convert electric power supplied from an external power source into optimum electric power at the fusion electric power source, and to supply fusion electric power to the electric fusion joint for a predetermined time. .

  By the way, since the optimal power and power supply time for fusion differ depending on the material, size, resistance value, etc., the fusion power and power supply time corresponding to each electrical fusion joint. Must be entered into the electrofusion apparatus.

  As a method for inputting the welding conditions to the electrofusion apparatus, there is a manual input method using a keyboard or the like, but Patent Document 1 has been proposed as a method for easily performing this input.

This is because the bar code on which the fusion condition of the electric fusion joint is written is attached to the electric fusion joint, and the barcode fusion condition is read by the reading means provided in the electric fusion device. The fusion is performed according to the fusion conditions.
Japanese Patent Publication No. 7-45185

  By the way, the allowable power corresponding to the diameter of the resin pipe for performing the fusion bonding is set in the fusion power supply unit of the electric fusion apparatus.

  For example, when joining large-diameter resin pipes with an electric fusion joint, a large fusion power is required. Therefore, a fusion power source unit with a large allowable power is incorporated in the electric fusion apparatus. On the other hand, when joining only small-diameter resin pipes with an electric fusion joint, a fusion power source unit with a small allowable power can be used in the electric fusion device, thereby forming the fusion power source unit. The cost of parts can be suppressed, and the electrofusion apparatus can be reduced in size and weight.

  In particular, a small-diameter resin pipe having a nominal diameter of 75 mm or less is often used at a construction site, and a welding power of about 700 W is sufficient to join resin pipes having such a diameter with an electric fusion joint. Therefore, it is possible to use an electric fusion apparatus in which a fusion power source unit having a relatively small allowable power is incorporated. Thus, as described above, since the electrofusion apparatus reduced in size and weight can be used, it is possible to easily cope with the fusion of the resin pipe or the movement of the electrofusion apparatus in a narrow place. The workability of the landing device can be improved.

  As described above, the allowable power is set in the fusion power supply unit of the electrofusion apparatus. However, if the fusion power value of the fusion condition is erroneously input to the electrofusion apparatus, or a large fusion power is required. In some cases, such as when trying to fuse a wrong electric fusion joint by mistake, the electric fusion device may accept a fusion power value that exceeds the allowable power of the fusion power supply unit.

  Such an error may also occur in an electrofusion apparatus managed with a bar code as described above. In this case, the electrofusion apparatus accepts an allowable power of the fusion power supply unit based on the received fusion power value. Even if it exceeded, it was going to supply the fusion power to the electric fusion joint.

  If an attempt is made to supply a fusion power exceeding the allowable power of the fusion power supply unit to the electric fusion joint, the fusion power becomes unstable and the resin pipe and the electric fusion joint are not sufficiently fused. There is a possibility that a bonding failure may occur, the fusion power supply unit may fail, or the electric circuit in the electrofusion apparatus may fail due to heat generated by the fusion power supply unit.

The present invention has been made in view of such circumstances, and its purpose is to provide an electric fusion from the fusion power source unit when the fusion power value of the input fusion conditions exceeds the allowable power of the fusion power source unit. By performing control that does not start the supply of fusion power to the joint, it is possible to eliminate poor bonding between the electric fusion joint and the resin pipe due to unstable supply of fusion power, and excessive power supply. It is an object of the present invention to provide an electric fusion apparatus capable of preventing failures such as a fusion power source unit and an electronic circuit inside the apparatus , and a method of joining an electric fusion joint and a resin pipe using the electric fusion apparatus .

  In order to solve the above-mentioned problems, an electrofusion apparatus according to the present invention is a resin that is supplied to an electrofusion joint from an external power source, generates heat in a connection portion of the electrofusion joint, and is inserted into the connection portion. In an electrofusion apparatus for fusing a connection end portion of a tube to this connection portion, a fusion power supply portion for supplying fusion power from the external power source to the heater, and fusion conditions such as fusion power and fusion time An input unit that receives input of setting information, and a control unit that controls the fusion power supply unit based on the fusion condition setting information received by the input unit, before the start of fusion, by the control unit, When it is determined that the fusion power value of the fusion condition setting information exceeds the allowable power value of the fusion power supply unit, supply of fusion power from the fusion power supply unit to the heater is started. Control that does not occur is performed.

  According to the present invention as described above, when the control unit determines that the fusion power value of the fusion condition setting information exceeds the allowable power value of the fusion power source unit before the fusion starts. Since control is performed so as not to start supply of fusion power from the welding power source unit to the heater, fusion is not performed with the fusion power exceeding the allowable power of the fusion power source unit.

  Therefore, unlike the conventional electrofusion apparatus, it is possible to eliminate the bonding failure between the electrofusion joint and the resin pipe due to unstable supply of fusion power, and the fusion power supply unit and the It is possible to prevent failure of an electronic circuit or the like inside the electrofusion apparatus.

  Further, before the start of fusion, when the control unit determines that the fusion power value of the fusion condition setting information exceeds the allowable power value of the fusion power supply unit, a fusion issuance that gives a warning. A disability notification means may be provided.

  In this case, since the warning is issued by the fusion impossible notification means, it is possible to make the operator recognize that the fusion power value of the fusion condition setting information exceeds the allowable power value of the fusion power supply unit. .

  The electrofusion apparatus according to the present invention is configured to reduce the fusion power from the fusion power supply unit to the electrical fusion joint when the fusion power value of the input fusion condition exceeds the allowable power of the fusion power supply unit. By performing the control that does not start the supply, it is possible to eliminate the bonding failure between the electric fusion joint and the resin pipe due to unstable supply of fusion power. It is possible to prevent a failure of the electronic circuit.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a block diagram showing an electrofusion apparatus according to the present embodiment.

  The electrofusion apparatus 1 according to the present embodiment includes a fusion power supply unit 11, an input unit 121, and a control unit 12. In addition, a control power supply unit 13 that supplies control power from the external power supply 2 to the control unit 12 is provided.

  The fusion power supply unit 11 is connected to the external power supply 2 and supplies fusion power to the heater of the electric fusion joint 3. One end of a cable 111 for supplying electric power to the electric fusion joint 3 is connected to the fusion power supply unit 11, and an output connected to the terminal 31 of the electric fusion joint 3 is connected to the other end of the cable 111. A connector 112 is provided. In the fusion power supply unit 11, the fusion power to the electric fusion joint 3 is controlled by the control unit 12 described later.

  The control unit 12 is mainly for controlling the fusion power and the power supply time of the fusion power source unit 11. An input unit 121 is connected to the control unit 12. In addition, control power is supplied to the control unit 12 from a control power supply unit 13 described later.

  The control unit 12 performs control for causing the fusion power supply unit 11 to output the optimum fusion power based on the fusion condition setting information received by the input unit 121, and the control unit 12 performs a predetermined fusion time. When the time has elapsed, the fusion power supply unit 11 is controlled to stop the fusion power.

  Further, when the control unit 12 determines that the value of the fusion power in the fusion condition setting information exceeds the allowable power value of the fusion power supply unit 11 before the fusion start, the control unit 12 starts from the fusion power supply unit 11. Control is performed so as not to start supplying the fusion power to the heater.

  As a result, fusion is not performed with a fusion power exceeding the allowable power of the fusion power supply unit 11, and therefore, unlike the conventional electrical fusion apparatus 1, an electrical fusion caused by an unstable fusion power supply is provided. It is possible to eliminate a bonding failure between the joint 3 and the resin pipe 4 and to prevent a failure of the fusion power supply unit 11 and an electronic circuit inside the electrofusion apparatus 1 due to excessive power supply.

  The input means 121 is for receiving input of fusion condition setting information such as fusion power and fusion time of the electric fusion joint 3. The input means 121 is not particularly limited. For example, the input means 121 is a bar code reader that displays the fusion power and the fusion time in advance on the electric fusion joint 3 with a barcode 32 or the like, and reads it. It may also be a manual input such as a keyboard. Here, the fusion condition setting information includes a voltage for fusion, an optimum time, a resistance value of the heater, and the like.

  The control power supply unit 13 is for supplying control power to the control unit 12 from the external power supply 2.

  In the electrofusion apparatus 1 according to the present embodiment, the fusion power value of the fusion condition setting information exceeds the allowable power value of the fusion power supply unit by the control unit 12 before the fusion starts. When it is determined, it may be provided with a non-fusion-informing means 122 that issues a warning. In this case, since a warning is issued by the fusion impossible notification means 122, it is possible to make the operator recognize that the fusion power value of the fusion condition setting information exceeds the allowable power value of the fusion power supply unit. it can.

  The non-fusible notification means 122 is not particularly limited, and may be, for example, a visual display such as blinking a lamp, or a warning that emits a sound. Good.

  Next, fusion bonding in the case where the electrofusion apparatus 1 of the present embodiment is used will be described with reference to FIG.

  First, the resin pipe 4 is inserted into the connection portion of the electric fusion joint 3 to connect the terminal 31 of the electric fusion joint 3 and the output connector 112.

  Next, fusing condition setting information such as fusing power and fusing time of the electric fusion joint 3 is received by the input means 121. For example, when the input means 121 is a barcode reader, the barcode 32 indicating the fusion condition setting information displayed on the electric fusion joint 3 is easily read by the barcode reader, so that the fusion condition setting information can be easily obtained. Can be entered.

  At that time, when the control unit 12 determines that the value of the fusion power in the received fusion condition setting information exceeds the allowable power value of the fusion power supply unit 11, the control unit 12 supplies the heater power to the heater. Control that does not start the supply of fusion power is performed, and a warning is issued by the fusion-impossible notification means 122.

  Further, when the control unit 12 determines that the fusion power value of the received fusion condition setting information does not exceed the allowable power value of the fusion power supply unit 11, the control unit 12 performs fusion according to the fusion condition setting information. Optimal fusion power is output from the power supply unit 11 to the electric fusion joint 3 to perform fusion, and when a predetermined fusion time has elapsed, the fusion power supply unit 11 is controlled to stop the fusion power.

  Next, an example in which fusion is performed on the electric fusion joint 3 using the electric fusion apparatus 1 of the present embodiment and the conventional electric fusion apparatus 1 will be described.

  Here, with respect to the electrofusion apparatus 1 of the present embodiment and the conventional electrofusion apparatus 1, a fusion power source unit 11 having an allowable power of 700 W was used.

  Moreover, the resin pipe 4 used for the fusion has a nominal diameter of 75, 100, and 150 mm, and the electric fusion joint 3 uses one corresponding to the nominal diameter of each resin pipe 4 ( Hereinafter, the respective electric fusion joints 3 are referred to as a socket 75, a socket 100, and a socket 150).

  In addition, for the electric fusion joint 3 of the socket 75, the socket 100, and the socket 150, the fusion power of the fusion condition setting information was 658W, 922W, and 1322W, respectively.

  When these electric fusion joints 3 and the resin pipe 4 are fused using the conventional electric fusion apparatus 1, the fusion power does not exceed the allowable power of the fusion power source 11 in the socket 75, which is good. We were able to finish the fusion.

  However, in the electric fusion joint 3 of the socket 100 and the socket 150, since the fusion power exceeds the allowable power of the fusion power supply unit 11, the fusion power becomes unstable during the fusion, and the fusion time is reduced. In some cases, the electrofusion joint 3 and the resin pipe 4 were poorly bonded even when the process was completed.

  On the other hand, when the electrofusion joint 3 of the socket 75 and the resin tube 4 are fused using the electrofusion apparatus 1 of the present embodiment, the fusion power does not exceed the allowable power of the fusion power supply unit 11. Therefore, it was possible to finish the fusion well.

  Further, in the electric fusion joint 3 of the socket 100 and the socket 150, since the fusion power exceeds the allowable power of the fusion power source 11, the controller 12 fuses the fusion power source 11 to the heater. Control that does not start the supply of electric power was performed, and an alarm was issued by the infusible informing means 122.

  Thereby, unlike the conventional electrofusion apparatus 1, the electrofusion apparatus 1 of this Embodiment was able to prevent the joint failure of the electrofusion joint 3 and the resin pipe 4 beforehand.

It is a block diagram which shows the electrofusion apparatus in Embodiment 1 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric welding apparatus 11 Fusion power supply part 12 Control part 121 Input means 122 Fusion impossible notification means 2 External power supply 3 Electric fusion joint 4 Resin pipe

Claims (2)

The welding condition setting information indicated by the bar code is received on the electric fusion joint, and the electric power is supplied to the heater in the connection portion of the electric fusion joint according to the received fusion condition setting information to generate heat. is, with, an electro-welding apparatus you joined by fusion splicing end portions of the inserted resin pipe in the connection portion between the said connection portion,
And welding power supply unit for supplying fusion bonding power to the heater in the connection portion of the electric fusion coupling,
An input means comprising a barcode reader for receiving input of fusion condition setting information of the electric fusion joint;
A control unit for controlling the welding power supply unit based on the fusion condition setting information by the input unit receives,
Be equipped with,
The controller, after inputting the fusion condition setting information, before supplying fusion power from the fusion power supply to the heater, the fusion of the fusion condition setting information received by the input means. A determination is made as to whether or not an input value of power exceeds an allowable power value set in the fusion power supply unit,
When it is determined that the input value of the fusion power does not exceed the allowable power value of the fusion power supply unit, supply of optimum fusion power to the heater is started according to the fusion condition setting information. Control is done,
Characterized in that the input value of the welding power if it is determined to exceed the allowable power value of the welding power supply unit, controls the supply of welding power to the heater does not start is performed An electrofusion apparatus. In the method of joining an electric fusion joint and a resin pipe using an electric fusion device,
As the electric fusion joint, the one where the fusion condition setting information is displayed in a barcode,
As the electrofusion apparatus,
A fusion power supply for supplying fusion power to a heater in the connection part of the electric fusion joint;
An input means comprising a barcode reader for receiving input of fusion condition setting information of the electric fusion joint;
A control unit that controls the fusion power supply unit based on the fusion condition setting information received by the input unit;
Use what comprises
  After the fusing condition setting information is input, before the supply of fusing power to the heater is started, the control unit fuses the fusing condition setting information received by the input unit. Determine whether the input value of power exceeds the allowable power value set in the fusion power supply unit,
When it is determined that the input value of the fusion power does not exceed the allowable power value of the fusion power supply unit, control for starting supply of optimum fusion power to the heater is performed according to the fusion condition setting information. While doing
When it is determined that the input value of the fusion power exceeds the allowable power value of the fusion power supply unit, by performing control not to start the supply of fusion power to the heater,
A bonding method between an electric fusion joint and a resin pipe using an electric fusion apparatus, wherein occurrence of poor bonding between the fusion joint and the resin pipe is prevented in advance.

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