JPH03190080A - Heater wire biting detecting device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a heater wire entrapment detection device used in manufacturing a heater unit constructed by sewing a heater wire to a support.

2. Description of the Related Art Conventionally, in an electric anchor 20 shown in FIG. 4, a heater wire 21 is sewn to a support 22 to form a heater unit 24, as shown in FIG.

A method of suturing the heater wire 21 to the support body 22 in this case is shown in FIG. FIG. 6 is an enlarged view of part A in FIG.
It is a zigzag stitch method with 2 stitches.

FIG. 7 shows how the heater wires 26 wired in a zigzag pattern are connected to the support body 26 with two sewing threads 27 and 28 (the bobbin threads are not shown).
9 shows a conventional example of stitching.

FIG. 8 is an enlarged view of part B in FIG. 7, in which the peaks and troughs of the heater wires 26 wired in a zigzag pattern are sewn to the support 29 with two sewing threads 27 and 28 to form the heater unit 30. ing.

As described above, methods of configuring the heater unit by stitching the heater wires 21, 26 to the support body 22, 29 using zigzag stitches or two-needle straight stitches have been introduced in the past. The diameter of wire 21.26 is also 2~3III
O+ is thick, and the corner part where the meandering wiring is done has a radius of 10a.
Furthermore, since the sewing method is zigzag stitching, sewing is mainly done at the peaks and troughs of the heater wires 26 which are wired in a meandering manner, so that the heater wires 21 are sufficiently larger than n. Since there is no risk of biting a .26, a detection device as in the present application is not provided.

Problems to be Solved by the Invention This method of manufacturing a heater unit by suturing has the following problems.

(1) When supplying and suturing the heater wire 22.26 automatically without human intervention, the heater wire 22.
It is not possible to check whether or not 6 is bitten.

After suturing, in order to completely check whether the heater wires 22, 26 are caught, there is no other way than to measure the insulation resistance while the heater units 24, 30 are immersed in water, which is actually impossible.

(2) In the case of a thick heater wire with a diameter of 2 to 3III11, even if the heater wire gets caught in the sewing needle 4, the heater wire is so thick that the sewing needle will be defeated (the sewing needle will shake), so it should be detected visually. However, if the heater wire is caught in a small diameter wire with a diameter of about 1ffi11 or less, there will be almost no abnormality in the sewing needle, and it is impossible to detect it visually. In addition, if the meandering angle of the heater wire is small, such as a radius of 10 mm+ or less, there is a risk that the heater wire may be caught by the sewing needle, which places restrictions on the thickness of the heater wire, wiring pattern, sewing speed, etc., and significantly reduces work efficiency. do.

Means for Solving the Problems In order to solve the above problems, the heater wire entrapment detection device of the present invention connects a power source via a resistor between the sewing needle of the sewing machine and the terminal end of the heater wire sewn to the support. It is equipped with a switch circuit that is activated by detecting the energization of the resistor.

Operation With the above configuration, it is possible to detect the heater wire being caught by the sewing machine's sewing needle, and there are no restrictions on the wiring pattern of the heater wire.
Moreover, it is also possible to automate the suturing of heater wires.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

FIG. 1 shows an overall configuration diagram of the heater wire entrapment detection device of the present invention (only the sewing needle portion of the sewing machine is shown).

In FIG. 1, 2 is a heater wire supply section, and a heater 141
is continuously supplied and sewn to the support body 3 with a sewing needle 4 of a sewing machine. (6 is a sewing thread; only the upper thread is shown, the lower thread is not shown, and the device for supplying the sewing thread 6 and the meandering wiring of the heater wire I are also omitted here.) Electrically connected to the sewing needle 4 of the sewing machine. A power source 8 is connected via a resistor 9 between a point B of the combined metal parts 5 and a point A via a slider 10 from the terminal end 7 of the heater wire l.

Here, the heater wire supply section 2 is an example in which the heater wire I wound on a reel is continuously supplied, and the slider 1 is used to supply the power source 8.
0 is used.

That is, if the terminal end 7 of the heater wire 1 is fixed and does not move, the power source 8 can be directly connected to the terminal end 7 of the heater wire 1 without using the slider 10.

FIG. 2 shows an example of the electric circuit of the heater wire entrapment device.

In FIG. 2, a power source 8 is connected between points A and B via a resistor 9, but this is the overall configuration diagram of FIG. 1 replaced with an electric circuit, and the push button switch 12. The switch circuit 11 is configured together with the flip-flop circuit 14.

That is, the push button switch 12 is connected to the power source 8 through the resistor 13, and the voltages of the resistors 9 and 13 are applied to the set power S and reset power R of the flip-flop circuit 14, respectively.
added to.

Therefore, when the push button switch 12 is turned on,
A current flows through the resistor 13, a voltage is applied to the reset force R of the flip-flop circuit 14, and the output Q becomes Lo (about 0).
), and the load 15 (indicator light, buzzer, etc.) becomes the initial state (lights out, stopped, etc.).

Here, if the heater wire 1 is jammed by the sewing needle 4 of the sewing machine, a connection will be made between point A (the terminal end 7 of the heater wire) and point B (the point where the heater wire 1 is jammed). The resistor 9 is energized, a voltage is applied to the set power S of the flip-flop circuit 14, and the output Q becomes H4 (the voltage of the power supply 8) to operate the load 15.

That is, in the process of sewing the heater wire 1 to the support body 3, if the heater wire 1 is bitten by the sewing needle 4 of the sewing machine, it can be detected by operating an indicator light, a buzzer, etc.

Alternatively, a relay can be used as a load to stop the sewing machine body.

FIG. 3 is a schematic diagram showing the main body 16 of the sewing machine and its installation base 17. Here, one end point B for detecting that the heater wire 1 is caught by the sewing needle 4 may be provided at an appropriate position on the sewing machine main body 16 electrically connected to the sewing needle 4 or on the installation stand 17.

Effects of the Invention As described above, the present invention can obtain the following effects by detecting the entanglement of the heater wire by the sewing needle of the sewing machine.

(1) Entrapment of heater wires can be detected without visual inspection, experience, or intuition, and defective products can be reliably checked.

In addition to being able to eliminate heater wire wiring, automatic stitching of the heater wire wiring can be performed.

(2) Thin diameter heater wires and wiring patterns with small meandering angles can be used, eliminating restrictions on suturing speed and improving work efficiency.

[Brief explanation of drawings]

Figure 1 is an overall configuration diagram of the heater wire jamming detection device of the present invention, Figure 2 is an electric circuit diagram of the heater wire jamming device, Figure 3 is a schematic diagram of the sewing machine main body and installation stand, and Figure 4 is a schematic diagram of the sewing machine body and installation stand. 5 and 7 are perspective views of the heater unit, and FIGS. 6 and 8 are partially enlarged views of FIGS. 5 and 7, respectively. 4...Sewing needle, 5...Metal part, 8...
...Power supply, 9...Resistor, 11...Switch circuit.

Claims (1)

[Claims] A power source is connected in series through a resistor between a sewing needle of a sewing machine that sews a heater wire supplied from a heater wire supply unit to a support, or a metal part electrically connected to the sewing needle, and the terminal end of the heater wire. and a heater wire entanglement detection device including a switch circuit that is activated by energizing the resistor.