JPH02129886A - Heater unit - Google Patents

Abstract

PURPOSE:To prevent a wiring pattern from being dislocated, by sewing up a heater wire being wired in meandering fashion, onto a supporting body along the wiring pattern through the process of both a straight stitch and a lock stitch. CONSTITUTION:A heater wire 1 is sewn up onto a cloth body 2, etc., on a needle thread 3 from a point X as the start of sawing. The heater wire 1 is always located in front of a wire sewing-up position and then it is sewn up onto a supporting body 2 on the needle thread 3 and a bobbin thread 4 until a terminal point Y is reached, by a guide arm which equally distributes the threads with alternations of a left thread and a right thread to a wire sewing-up direction and by the method of both a straight stitch and a lock stitch according to a given wiring pattern. The wiring pattern being formed of the heater wire is kept such that the wire sewing-up direction does not exceed an angle of 360 degrees during the time when the wire is sewn from the starting point X to the terminal point Y. This structure prevents the wiring pattern being formed of the heater wire from being deformed, while the danger of moving the heater wire can be canceled so that any deformation of the pattern is prevented even in case of sewing up the wire onto each of small U-turn portions.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a heater unit of a vehicle seat heater used for heating the seats of vehicles and the like.

Prior Art FIG. 8 is a perspective view showing a vehicle seat 10 equipped with a heater unit 15, 16, in which 11 is a seat part, 12 is a back part, and there are spaces between an outer skin 13, 14 and a main pad 17, 18, respectively. A heater unit 15.16 is installed.

FIG. 9 shows the configuration of the heater unit 15.
Reference numeral 0 denotes a flexible support such as a tangible body, and a heater wire 19 is wired in a meandering manner between the layers that bond the two together. 2
1 is connected to a vehicle battery (not shown) or the like through a lead wire.

10 to 12 show the manufacturing process of the meandering wiring of the heater wire 19 of the heater unit 15 shown in FIG. 9.

In the figure, reference numeral 23 denotes a board made of Bakelite or the like, and pins 22 are inserted into each corner of the meandering wiring of the heater wire 19 in the board 23.

A spring (not shown) or the like is used for this pin 22 so that it can move up and down.
2 is inserted and set on the board 23.

Next, the heater wire 19 is wired in a meandering manner along the pin 22, and then the other support 20 is attached to complete the heater unit 15.

Further, in the electric liner 24 shown in FIG. 13, a heater wire 19 is sewn to a support body 20 to form a heater unit 15, as shown in FIG. 14.

In this case, the method for suturing the heater wire 19 to the support body 20 is as follows:
It is shown in FIGS. 15 and 16. Figures 15 and 16 are enlarged views of section C in Figure 14; Figure 15 is a surface view;
The figure shows the back view.

That is, the heater wire 19 is sewn to the support body 20 with the upper thread 25 and the lower thread 26 forming a zigzag shape with respect to the heater wire 19 (lockstitch zigzag).

Furthermore, as shown in FIGS. 17 to 19, the heater wire 1
There is a method of manufacturing the heater unit 15 by stitching the heater unit 9 to the support body 20. (Japanese Utility Model Publication No. 37-18988, Japanese Unexamined Patent Publication No. 53-96539) As shown in FIG. (not shown) is a method of suturing to the support body 20.

Fig. 18 is an enlarged view of the 17th drawing section, where two sewing threads 25°27
The heater unit 15 is sewn to the support body 20.

Also, the one shown in FIG. 19 similarly has three sewing threads 2527,
An example using 28 is shown.

Problems to be Solved by the Invention However, such conventional heater unit manufacturing methods have the following problems.

(1) In the method shown in FIGS. 14 to 16, the support 20
This is a holding method in which the heater wire 19 is simply pressed from both sides with the upper thread 25 sewn in a zigzag pattern, and the force for holding the heater wire on the support body 20 is weak, allowing the heater wire 19 to move easily and safely. Sexuality is impaired and there is a danger.

Therefore, this method has the disadvantage that it is dangerous and cannot be used in heater units that require thin heater wires with a diameter of about one wire or less or wires with a small meandering angle.

In addition, since it is sewn in a zigzag pattern, the upper thread 25 and the lower thread 26
The usage amount of the heater wire 19 is approximately twice that of the heater wire 19.

This increases the frequency of bobbin replacement, particularly for bobbin thread, which significantly reduces work efficiency.

(2) In the method shown in FIGS. 17 to 19, the heater wire 1
9 cannot be wired in a straight line, and must always be wired in a uniform wavy manner. Therefore, there is a drawback that the shape of the heater unit 15 and the wiring pattern of the heater wires 19 are greatly restricted.

Further, depending on the wiring of the heater wire 19, three or more stitches of suture may be required in consideration of the holding force with the support body 20.

(3) In the method shown in FIGS. 10 to 12, the heater wire 1
9 wiring patterns require a board 23 with pins 22 in each case. In other words, one wiring jig is required for each model, which is extremely inconvenient for producing multiple models and poses the biggest challenge in promoting automation.

Furthermore, two supports 20 were required to hold the heater wires 19.

The present invention solves the above problems and provides a highly safe heater unit with almost no misalignment of the wiring pattern.

Means for Solving the Problems In order to solve the above-mentioned problems, the heater unit of the present invention is one in which a meandering heater wire is sewn to a support body along the wiring pattern in a straight line or in a straight line.

Function: With the above-described configuration, even heater wires with a small diameter or a wiring pattern with a small meandering diameter can be sewn to the support, and there is almost no misalignment of the wiring pattern.

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings.

In FIG. 1, reference numeral 5 denotes a heater unit of the present invention, and a heater wire 1 is sewn to a sewnable support 2, such as a tangible body, with a needle thread 3.

FIG. 2 shows an example of the wiring pattern of the heater wire 1 sewn to the support 2. As shown in FIG.

In FIG. 2, the heater wire 1 starts suturing in the direction of the arrow with point X as the starting point of suturing. The heater wire 1 is always located in front of the sewing position, and is sewn in a straight line and lockstitch according to a predetermined wiring pattern by a guide arm (not shown) that moves evenly in alternating left and right directions in the sewing direction. The needle thread 3 and the lower thread 4 (FIG. 3) are used to stitch to the support body 2 to the end point Y.

Here, the wiring pattern of the heater wire 1 forms a wiring pattern in which the direction until reaching the end point Y does not exceed one rotation (360 degrees) with respect to the direction at the starting point X of the M-coupling.

3 is an enlarged view of section A in FIG. 2, FIG. 4 is a back view of section A in FIG. 2, and FIG. 5 is a side view of section A in FIG. 2.

In FIGS. 3 to 5, the heater wire 1 is sewn to the support 2 by an upper thread 3 and a lower thread 4. Here, the upper thread 3 wraps around the heater wire 1 almost all the way around, and the heater wire The bobbin thread 4 and the entangled support 2 are sewn approximately on the center line of the thread 1 .

As for the stitching position, as shown in FIG. 4, since the stitching is performed in a straight line and on the center line of the heater wire 1, the underline 4 follows the same route as the wiring pattern of the heater wire 1.

FIG. 6 is a sectional view taken along line E-E in FIG. 5, showing a state in which the needle thread 3 wraps around the heater wire 1 almost all around.

Here, FIG. 6(A) is an example of suturing to a support 2 whose thickness is approximately equal to or greater than the diameter of the heater wire 1. A part of the heater wire 1 sinks into the support 2 due to suturing, making it more stable. A holding state can be obtained. Moreover, FIG. 6(B) shows an example of the sutured state when the support body 2 is thinner than the diameter of the heater wire 1 or when it is harder than the heater wire 1.

The suturing state shown in FIGS. 6(A) and 6(B) can be freely selected depending on the tightening tension of the upper thread 3 and lower thread 4 during suturing, the thickness and hardness of the support 2, etc. The heater unit 2 can be manufactured according to the purpose.

The seam format used in this example is, for example, as described in the Fiber Handbook - Processing Records - 2nd Edition (Maruzen Co., Ltd. February 20, 1980).
This corresponds to number 1 (lockstitch) in Tables 7 and 5 on page 678 of the Japanese publication).

FIG. 7 is an enlarged view of section B in FIG. 2, showing an example of sewing at the U-turn portion of the heater wire 1.

In FIG. 7, the stitch pitch b of the U-turn portion of the heater wire 1 is narrower than the stitch pitch a of the straight portion (by doing so, the distortion of the wiring pattern at the U-turn portion of the heater wire 1 can be made smaller). Can be done.

According to experiments, when a thin wire with a wire diameter of 0.8 mm is used as the heater wire 1, the stitch pitch b of the U-turn part is set to 2 to 3.
mm (for example, 2 to 4 times the diameter of the heater wire), the radius is 3
Even at the U-turn portion of mm, the wiring pattern did not collapse, and it was possible to stitch it to the support body 2.

Note that if the stitch pitch a of the straight portion is 3 to 5 degrees (for example, 3 to 6 times the diameter of the heater wire), the wiring pattern will not be distorted.

Also, at this time, the upper thread 3 has a #30 to #60 count, and the lower thread 4 has a #30 to #60 count.
A good suturing result could be obtained by using a nonwoven fabric having a diameter of #80 to #120 and having a thickness approximately twice the diameter of the heater wire 1 as the support body 2.

Further, the stitch pitch a in the straight portion of the heater wire 1 was suitably 4 to 5 torsos when the sewing speed was 400 stitches/min, taking into consideration the movement of the heater wire 1 and the holding condition with the support body 2.

Effects of the Invention As is clear from the description of the embodiments above, the heater unit of the present invention obtains the following effects by sewing the heater wires to the support body in a straight line and in a regular manner according to the wiring pattern of the heater wires. be able to.

(1) The needle thread wraps around the heater wire almost all the way around,
Since the heater wire is intertwined with the bobbin thread on the center line of the heater wire and sewn to the support, it has a strong holding force to the support, even for thin heater wires with a wire diameter of 1 mm or less, and even a U-turn with a radius of about 3 mm can be used as a wiring pattern. (No deviation occurs.

Therefore, the selection range of heater wires and wiring patterns to be used is widened, and the risk of safety being compromised due to movement of the heater wires can be eliminated.

(2) The sewing thread used for suturing the heater wire can be done with one needle and two threads for the upper thread and the lower thread, and since the sewing thread is sewn almost straight on the center line according to the wiring pattern of the heater wire, it is possible to use less thread. Can be sutured in quantity.

In particular, the length of the bobbin thread is almost the same as the heater wire, and the frequency of bobbin replacement is less than half that of conventional zigzag stitching, greatly improving work efficiency.

(3) Since the stitch pitch when sewing the heater wire to the support body can be selected arbitrarily, the stitch pitch can be widened in the straight section.
The U-turn portion with a small radius can narrow the stitch pitch, prevent the wiring pattern from deforming, and shorten the time required for sewing.

(4) By appropriately selecting the tightening tension of the upper thread and bobbin thread, and the thickness and hardness of the support, the heater wire can be sutured to the support.
The degree of retention can be adjusted.

That is, by sinking the heater wire into the support, etc., it is possible to manufacture a heater unit that does not have an uneven feel.

(5) Since the heater wire is wired in a meandering manner, a wiring jig having pins on the board is not required, and the heater unit can be configured with only one support.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a heater unit showing an embodiment of the present invention, FIG. 2 is a front view of the same heater unit, and FIG.
Fig. 4 is an enlarged back view of section A in Fig. 2, Fig. 5 is a side sectional view of section A in Fig. 2, Fig. 6 (A),
B) is an enlarged sectional view of FIG. 5 E-E, and FIG. 7 is an enlarged sectional view of FIG. 2 B.
FIG. 8 is a perspective view showing the configuration of a vehicle seat equipped with a heater unit; FIG. 9 is a perspective view of a conventional heater unit mounted on the same vehicle seat;
Figure 0, Figure 11, and Figure 12 are explanatory diagrams of the manufacturing process of the meandering part wiring of a conventional heater unit, Figure 13 is a perspective view of an electric liner, and Figure 14 is a diagram of the conventional wiring used in the electric liner. A perspective view of the heater unit, FIG. 15 is an enlarged front view of section C in FIG. 14, FIG. 16 is an enlarged back view of section C in FIG. 4, and FIG. 17 is a perspective view of a heater unit showing another conventional example. FIG. 18 is an enlarged perspective view of the 17th drawing section, and FIG. 19 is a perspective view of a main part of a heater unit showing another conventional example. 1... Heater wire, 2... Support body, 3.
...Upper thread, 4...Lower thread, 5...
heater unit. Name of agent: Patent attorney Shigetaka Awano Figure 1 Figure 10 Figure 11 Figure 11-n, --To J Law 7720 Figure 12 Figure 14! , Figure 17

Claims (2)

[Claims] (1) A heater wire, a support, and an upper thread and a lower thread for sewing the heater wire in a meandering manner to the support, and the lower thread is sewn approximately on the center line of the heater wire to be wired in a meandering manner. The heater unit is formed by sewing the heater wire along the supporting body by lock-stitching the heater wire with an upper thread and a lower thread. (2) The heater unit according to claim 1, wherein the stitch pitch of the U-turn portion of the heater wire sewn to the support in a meandering manner is narrower than the stitch pitch of the straight portion.