JPH07177634A - Method and system for producing flexible synthetic resin conduit pipe embedded with wire - Google Patents

Abstract

PURPOSE:To facilitate the conduction test, when a flexible synthetic resin conduit pipe embedded with a wire is wound up by a predetermined length and cut off, by testing conduction of the conduit pipe to be wound up next accumulated in an accumulator. CONSTITUTION:An accumulator 27 for accumulating a flexible synthetic resin conduit pipe 21 embedded with a wire longer than the length to be wound up by single operation is installed between a cooling water tank 19 and a cutting machine 25. A test circuit 29 applies a voltage between the conductor of a wire 11 at the start-of-winding around a supply drum and the cutter 25a of the cutting machine 25 and tests the conducting state between the start-of- winding of the wire 11 around the supply drum and a point to be cut off. Since the cutter 25a touches the conductor of the wire 11 when the cutting machine 25 cuts off the conduit pipe 21, a current flows through the wire 11 so long as the wire is not disconnected otherwise the current does not flow. In other words, at least the conduit pipe 21 accumulated in the accumulator 27 is not disconnected so long as the wire is not disconnected at the time of cutting the conduit pipe.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a flexible resin conduit tube made of synthetic resin containing an electric wire and an apparatus used for the method.

[0002]

2. Description of the Related Art When wiring indoors, a method is usually used in which a conduit is laid along a predetermined route before the floor or wall is completed and the wire is drawn into the conduit after the floor or wall is completed. It was taken. However, this method is uneconomical because the wiring work requires the work of laying a conduit tube and pulling in the electric wire twice.

Therefore, recently, a flexible resin-made flexible electric wire tube containing an electric wire, in which an electric wire has been drawn in advance into a synthetic resin-made flexible electric wire tube, has come into use. By using this flexible plastic conduit tube containing electric wires, it is possible to lay the conduit tube and the wires at the same time at the construction site, so there is no need for wire drawing work, which is a great effect in reducing man-hours.

Conventionally, a flexible conduit tube made of a synthetic resin containing an electric wire is manufactured as shown in FIG. First, the electric wire 11 sent from the supply drum 13 is passed through the electric wire tube forming machine 15 to form a synthetic resin flexible electric wire tube 17 around the electric wire 11. The electric wire 11 has a form in which a synthetic resin sheath is provided on the outer circumference of one or more insulated core wires, and the synthetic resin flexible electric wire tube 17 is in the form of a corrugated tube.

A synthetic resin flexible conduit 17 exiting the molding machine 15.
Is immediately introduced into the cooling water tank 19 and cooled to complete the flexible electric wire tube 21 made of synthetic resin containing electric wires. The manufactured synthetic resin flexible electric wire tube 21 with electric wires is bundled by a winding machine 23 into a predetermined length. That is, on the take-up side, when the take-up machine 23 takes up one bundle of length, the cutting machine 25
The operation of cutting the flexible resin conduit 21 made of synthetic resin containing an electric wire is repeated.

The supply drum 13 is wound with an electric wire that is sufficiently longer than the length of one bundle of flexible electric wire conduits 21 made of synthetic resin containing an electric wire. In addition, a flexible conduit tube made of synthetic resin containing electric wires
21 may be wound on a drum instead of being bundled.

[0007]

When shipping manufactured synthetic resin flexible conduit tubes containing electric wires, it is necessary to ensure that the wires in the synthetic resin flexible conduit tubes are not broken. For this reason, conventionally, the electric conduction state of the electric wire is inspected for each one bundle (or one drum), but this inspection work requires manpower, which causes a cost increase. An object of the present invention is to inspect a conductive state of an electric wire in a manufacturing line of a flexible resin-made flexible electric wire tube containing an electric wire, and to make an electric wire for each bundle (or 1 drum) of a synthetic resin-made flexible electric wire tube containing an electric wire. It is an object of the present invention to provide a manufacturing method and apparatus capable of guaranteeing that there is no disconnection.

[0008]

[Means for Solving the Problems] In the production of a flexible resin conduit tube made of a synthetic resin containing an electric wire, a disconnection may occur between the time when the electric wire leaves the supply drum and the time when the electric wire exits the cooling water tank. It was confirmed experimentally that there is no risk of disconnection after the synthetic resin flexible conduit has cooled and solidified.

Therefore, according to the present invention, the electric wire sent from the supply drum is passed through an electric wire tube forming machine to form a synthetic resin flexible electric wire tube around the electric wire, and then the electric wire tube is passed through a cooling water tank for cooling. Then, the synthetic resin flexible electric wire tube with electric wires is continuously manufactured, and on the winding side, if the manufactured synthetic resin flexible electric wire tube with electric wires is wound up to a predetermined length, it should be cut. When repeated, accumulators between the cooling water tank and the cutting machine accumulate flexible resin conduits with electric wires for a length equal to or longer than one winding length, and the conductor at the winding start end of the supply drum of electric wires. A voltage is applied between the blade of the cutting machine and the blade of the cutting machine to inspect the electrical connection state from the winding start end of the supply drum of the electric wire to the cutting point at the time of cutting.

[0010]

With this configuration, when the cutting machine cuts the flexible resin conduit tube containing the electric wire, the blade of the cutting machine comes into contact with the conductor of the electric wire. If there is, no current will flow. Therefore, the presence or absence of disconnection can be inspected by monitoring the current at the time of disconnection.

Further, since the flexible resin conduit tube containing the electric wire is accumulated between the cooling water tank and the cutting machine by the accumulator for a length more than one winding length, at least if there is no disconnection at the time of cutting. It can be confirmed that there is no break in the synthetic resin flexible conduit that contains the electric wire accumulated in the accumulator. Therefore, it can be guaranteed that there is no disconnection for one winding after it is confirmed that there is no disconnection at the time of cutting. Therefore, as long as no disconnection is detected at the time of cutting, it is possible to manufacture a flexible plastic resin conduit tube containing an electric wire in which it is guaranteed that there will be no disconnection.

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 shows an embodiment of an apparatus for carrying out the method of manufacturing a flexible resin conduit tube made of synthetic resin containing an electric wire according to the present invention. This device includes a conduit tube molding machine 15 that molds a synthetic resin flexible conduit tube 17 around an electric wire 11 sent from a supply drum 13, and a molded synthetic resin flexible conduit tube 17.
A cooling water tank 19 for cooling the, and a winder 23 for winding a synthetic resin flexible electric wire tube 21 containing an electric wire, which has come out of the cooling water tank 19,
Synthetic resin flexible conduit with electric wire in front of the winder 23
A cutting machine 25 for cutting 21 is provided. The above is the same as that of the conventional device.

This device is characterized by a cooling water tank 19 and a cutting machine 25.
An accumulator 27 for accumulating the flexible resin flexible conduit tube 21 containing electric wire for longer than one winding length is installed between the two, and further, the conductor of the supply drum winding start end of the electric wire 11 and the blade of the cutting machine 25. Apply a voltage between 25a and the wire when cutting
11 is the provision of the inspection circuit 29 for inspecting the electrical connection state from the winding start end of the supply drum 11 to the cutting point.

The accumulator 27 is a type in which a flexible electric wire tube 21 made of synthetic resin containing electric wires is wound a required number of times around two sets of turn sheaves 31 whose central axes are arranged in parallel at an appropriate distance. The accumulated length of the synthetic resin flexible electric wire tube 21 containing the electric wire of the accumulator 27 is, for example, 50 m or more if the length of one winding is less than 50 m. By installing the accumulator 27, the flexible resin conduit 21 made of synthetic resin containing electric wire that comes out of the cooling water tank 19
After passing through 27, the film is taken up by the take-up machine 23, and after taking up a predetermined length, cutting is performed.

Next, a concrete example of the inspection circuit 29 is shown in FIG. 11
a to 11c are conductors of the electric wire 11. In the illustrated example, since the electric wire 11 is a three-core insulated electric wire, three conductors 11a to 11c are shown. 33a to 33c are conductor rings. These conductor rings 33a to 33c are supply drums as shown in FIG.
It is attached to the outer surface of the collar 13 and rotates with the supply drum 13. The conductor rings 33a to 33c are respectively provided with conductors 11a.
The end of the supply drum side of ~ 11c is connected. 35a ~
Reference numeral 35c is a brush that contacts the rotating conductor rings 33a to 33c. Attaching the conductor rings 33a to 33c to the supply drum 13, the conductor rings 33a to 33c and the conductors 11a to 11 of the electric wire.
The connection with C, the attachment of the brushes 35a to 35c, etc. are performed before the start of operation.

37a to 37c are conduction detecting circuits. Each of the continuity detection circuits 37a to 37c includes a blade 25a of the cutting machine and a brush 35.
When a voltage application terminal 39 for applying a voltage between a to 35c and a flexible resin conduit tube 21 containing an electric wire are cut, a blade 25a contacts a conductor 11a to 11c of the electric wire to form a closed circuit. It has a current detection terminal 41 for detecting a flowing current. The continuity detection circuits 37a to 37c can be configured by, for example, a relay circuit or the like including a coil through which a current flows at the time of disconnection and a contact which is closed when the current flows through the coil. 43 is an AC / DC converter.

Current detection terminals of the continuity detection circuits 37a to 37c
The output of 41 is recorded in the pen recorder 45. Therefore, if it is recorded that a current flows through the pen recorder 45 at the time of disconnection, it can be confirmed that there is no disconnection from the supply drum winding start end of the electric wire 11 to the disconnection point.

In the manufacturing apparatus of this embodiment, since the accumulator 27 stores the flexible resin flexible wire tube 21 containing electric wire for a length equal to or longer than one winding length, there is no disconnection at the time of cutting. If it can be confirmed, it can be guaranteed that there is no disconnection for the subsequent one winding. On the take-up side, as in the past, cutting is repeated after winding a specified length, but as long as no disconnection is detected at the time of cutting, it is guaranteed that there will be no disconnection one after another. A bundle of conduits 21 will be manufactured.

[0019]

As described above, according to the present invention, when a flexible resin conduit tube containing an electric wire is wound up and cut for a predetermined length, the next time the wire-wound synthetic material accumulated in the accumulator is stored. Since the conductive state of the resin flexible conduit will be inspected, if no disconnection is detected at the time of cutting, it can be guaranteed that the synthetic resin flexible conduit containing the wire to be wound next has no disconnection. Therefore, it is not necessary to manually check the conduction state, which is a significant effect in cost reduction.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of a manufacturing apparatus of a synthetic resin flexible electric wire tube with electric wires according to the present invention.

2 is a wiring diagram showing an example of an inspection circuit in the apparatus of FIG.

FIG. 3 is an overall configuration diagram showing a conventional manufacturing apparatus of a flexible resin conduit tube made of a synthetic resin containing an electric wire.

[Explanation of symbols]

 11: Electric wire 13: Supply drum 15: Conduit forming machine 17: Synthetic resin flexible conduit tube 19: Cooling water tank 21: Synthetic resin flexible conduit tube with wire 23: Winding machine 25: Cutting machine 25a: Cutting machine Blade 27: Accumulator 29: Inspection circuit 31: Turn sheave 33a, 33b, 33c: Conductor ring 35a, 35c, 35c: Brush

Claims (2)

[Claims] 1. An electric wire sent from a supply drum (13)
Pass the (11) through the conduit molding machine (15) to mold the synthetic resin flexible conduit (17) around the wire, and then cool the conduit through the cooling water tank (19). Synthetic resin flexible conduit tube (21) with electric wires is continuously manufactured, and on the winding side, the synthetic resin flexible conduit tube (21) with electric wires produced is cut if it has been wound for a specified length. In the method of manufacturing a synthetic resin flexible conduit tube containing electric wires, which is repeatedly performed, the synthetic resin flexible conduit tube (21) containing electric wires is wound once between the cooling water tank (19) and the cutting machine (25). In addition to accumulating more than the take-up length, a voltage is applied between the conductor at the winding start end of the supply drum of the wire (11) and the blade (25a) of the cutting machine, and the wire is cut from the winding start end of the supply drum at the time of cutting. A method for manufacturing a flexible conduit tube made of synthetic resin containing an electric wire, characterized by inspecting a conduction state up to a location. 2. An electric wire sent from a supply drum (13)
A conduit molding machine (15) that molds a synthetic resin flexible conduit (17) around (11), a cooling water tank (19) that cools the molded synthetic resin flexible conduit, and a cooling water tank. Winding machine (2) that winds the flexible resin conduit tube (21)
3) and a cutting machine (25) for cutting the synthetic resin flexible electric wire tube (21) containing the electric wire in front of the winder (19)
The flexible resin conduit (2
Install an accumulator (27) that accumulates 1) more than one winding length, and further between the conductor at the winding start end of the supply drum of the wire (11) and the blade (25a) of the cutting machine. An apparatus for manufacturing a flexible conduit tube made of a synthetic resin, characterized in that an inspection circuit (29) is provided for applying a voltage to the wire and inspecting a conduction state from a winding start end of a supply drum of an electric wire to a cutting point during cutting.