JPH0424204A - Device for thermally bonding tape-like raw material - Google Patents

Abstract

PURPOSE:To prevent the generation of the irregular thermal adhesion of webs in a tape-like raw material by drawing out the tape-like raw material by a carrying and nipping means through a heating means, returning the raw material to the heating means by a returning means and subsequently drawing out the raw material. CONSTITUTION:A tape-like raw material T transferred on a guide passageway 10 in the carrying direction with upper and lower rollers 11 and 12 is heated with a heating means 10 having a heater 7 and a fan 8 to thermally fuse an interlining in the tare-like raw material T, followed by pressing the raw material with both the rollers 11 and 12. The roller are stopped, reversely rotated to return the tape-like raw material T in an interval A between the heating means 6 and the rollers 11 and 12. The cooled and hardened adhesive interlining is herein again thermally melted and carried to the nipping means.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a heat bonding device for tape-like materials.

[Conventional technology]

Generally, belt loops for inserting a belt are sewn at multiple locations on the outside of the upper end of trousers. 6th
As shown in Figure 6(a), the upper and lower ends of the strip-shaped belt loop R are folded back to face each other, and then the belt loop R is folded back to the upper end of the pants Z as shown in Figure 6(b). They were sewn using a sewing machine with the parts Ra in contact with each other so that they were located on the inside.

As shown in FIG. 7(a), the belt loop R contacts the upper surface of the tape-shaped adhesive interlining S with the same tape-shaped fabric W, and also connects the left and right sides of this fabric W with the adhesive interlining S. It is formed by cutting a tape-like material T into a predetermined length, which is formed by sewing an adhesive interlining S and a fabric W together using a single-sided decorative stitch sewing machine while folded back to the back side of the tape and making contact with each other.

Also, before the cutting step, both the front and back sides of the tape-shaped material T are heated and pressed by a heating and pressure roller, and the adhesive interlining S is melted by the heat, and this melted interlining S is applied to both the front and back sides. It soaks into the fabric W and prevents the ends Rb of the folded portions Ra at both ends of the cut belt loop R from fraying when the pants are washed or the like. If the adhesive interlining S is not used, the cut end Rb of the belt loop R will be made of only the fabric W and will fray during washing, etc., but as a method to prevent this fraying, heat the interlining S to the fabric W with a roller. In addition to the above-described pressure bonding method, there is also a method in which the tape-like material T is cut into a predetermined length without using the adhesive interlining S, and then rubber glue or the like is applied to prevent fraying at both ends and then dried.

[Problem to be solved by the invention]

However, the former method of heating and pressurizing with rollers,
In addition to requiring a heating temperature of 250°C or higher, it is also necessary to contact the heating/pressing roller with the tape-shaped material T. Therefore, if the rotation of the heating/pressing roller is stopped, the tape-shaped material may burn or There was a risk of a fire, etc.

Further, the latter method of applying and drying rubber glue, etc. has a problem of extremely low working efficiency.

In addition, if the adhesive interlining is simply melted by heating the tape-shaped material, simply melting it into the adhesive interlining or one of the upper or lower fabrics will be effective in preventing fraying. I can't.

An object of the present invention is to improve the burnout and safety of tape-like materials, and to heat and melt again the adhesive interlining that has melted and hardened during the period when the feeding means is stopped. To provide a heat bonding device for tape-like materials, which can evenly and reliably bond the entire fabric.

[Means to solve the problem]

In order to achieve the above object, the present invention includes a guide path for guiding a tape-like material sewn by sandwiching an adhesive interlining inside both the front and back fabrics, and a guide path for guiding the tape-like material at a position apart from the tape-like material. a heating means for heating to melt the adhesive interlining; a feeding means for feeding out the tape-like material heated by the heating means; A material clamping means for compressing the material from both sides so that it soaks into both the front and back fabrics, and a heating means that heats a tape-shaped material located between the heating means and the feeding means when the feeding means are stopped. and a return means for returning it to a possible position.

[For production]

In this invention, when the tape-like material transferred in the feeding direction by the feeding means is heated by the heating means, the adhesive interlining inside the tape-like material is heated and melted.

Next, when this tape-like material is compressed by the material clamping means, the melted adhesive interlining permeates into the fabrics on both the upper and lower sides, and both fabrics are bonded together.

In this invention, since the heating means does not come into contact with the tape-shaped material while the feeding means for the tape-shaped material is activated and stopped, the tape-shaped material will not be burned or a fire will occur due to abnormal heating.

Furthermore, the present invention provides, in a state where the feeding means is stopped,
By providing a means for returning the tape-shaped material located between the heating means and the feeding means to a position where it can be heated by the heating means, the adhesive interlining that has been cured after heating is heated again and the material is melted. It can be sent out to the pinching means side, thereby eliminating uneven heat adhesion of the tape-like material fabric and improving reliability.

〔Example〕

An embodiment embodying the present invention will be described below with reference to FIGS. 1 to 5.

In this embodiment, as shown in the basic configuration of FIG. Pressure is applied from both sides to melt the adhesive interlining S to the fabric W.
A heat bonding device 3 is constituted by a pressure bonding device 2 for infiltrating the liquid.

The heating device 1 includes a storage case 4, a guide path 5 for the tape-shaped material T stored therein, and a heating heater 7 as a heating means stored in the heating case 6 for heating the tape-shaped material. Furthermore, a blowing mechanism 8 blows air heated by the heating heater 7 onto the surface of the tape-shaped material T.
It is composed of. Further, a convergence part 6a is formed at the lower end of the heating case 6 for converging hot air and efficiently supplying it to the surface of the tape-shaped material T.

At a predetermined position below the convergence part 6a, a temperature detector 37 is arranged as a temperature detection means, which is a thermistor for detecting the temperature of the hot air that has passed through the tape-shaped material T.

Next, to explain the pressure bonding device 2, the storage case 9 is provided with a guide passage 10 for the tape-shaped material T,
In the middle of the guide path 10, there are upper and lower feed rollers 11 and 12 for pinching the tape-like material T from both the upper and lower sides and causing the melted adhesive interlining S to seep into the fabric W on both the upper and lower surfaces. It is supported by drive shafts 13 and 14 so as to be rotatable in forward and reverse directions. Further, a roller biasing spring 15 is provided on the upper feed roller 11 side to bias the roller 11 downward. In this embodiment, for the upper and lower delivery rollers 11.12,
In addition to serving as a feeding means and a material clamping means,
It also serves as a return means.

As shown in FIG. 2(a), a one-sided decorative stitch sewing machine 19 and a material slack detection device 24 are sequentially installed on the feeding side of the tape-like material T of the heat bonding device 3 configured as shown in FIG. ing. The one-sided decorative stitch sewing machine 19 is capable of sewing a tape-like material T by the cooperation between the vertical movement of the needle 18 of the sewing machine head 17 provided above the sewing machine table 16 and the rotational movement of the hook (shown in the figure) provided below the table. The fabric W and the adhesive interlining S are sewn as shown in FIG. 7(b).

Further, the material slack detection device 24 is connected to the support shaft 20 above the tape-shaped material T transferred from the decorative stitch sewing machine 11.
The tip of the loosening detection lever 21 rotatably supported by the tape-shaped material T is brought into contact with the upper surface of the material T as shown in
If the material T is stretched horizontally as shown by the solid line in FIG. 21 is rotated downward, a material slack detection switch 23 is operated.

Further, as shown in FIG. 3, a material slack detection device 24A similar to the material slack detection device 24 described above is installed on the feeding side of the tape-shaped material T of the heat bonding device 3 shown in FIG. An automatic belt loop sewing machine 25 is installed on the material delivery side of the slack detection device 24A to cut the tape-like material T into a predetermined length and to sew the cut belt loop R to pants or the like. This automatic belt loop sewing is performed using a sewing machine, for example, the conventionally known Japanese Patent Publication No. 58
There is a publication No.-39921.

Next, the operation control device for the heat bonding device 3 and the material slack detection device 24 will be explained based on FIG. 4.

A central processing unit (CPU) 31 for calculating and controlling various operations based on preset programs includes:
A read-only memory (ROM) 32 that stores the programs and the like, and a random access memory (RAM) 33 that stores detected data and the like are connected.

Further, a temperature setting digital switch 36 is connected to the CPU 31 via an input interface 34, and the temperature setting digital switch 36 can appropriately set the melting temperature of the adhesive interlining S according to its material, thickness, etc. be. Further, the temperature detector 37 is connected to the interface 34 via an A/D conversion circuit 38, and the tension and slack detection switches 22 and 23 of the tape-shaped material T are also connected to the interface 34.

On the other hand, the air blowing mechanism 8 is connected to the CPU 31 via an output interface 35 and a motor 0N10FF circuit 39.
A blower motor Ml is connected to the output interface 35, and a drive motor M2 for rotating the feed roller I1.12 in forward and reverse directions is connected to the output interface 35 via a motor forward and reverse rotation stop circuit 40. Further, a phase control circuit 42 constituting heating/preheating switching control means is connected to the interface 35 via a D/A conversion circuit 41, and the heating heater 7 is connected to the phase control circuit 42. .

Next, the operation of the heat bonding apparatus for the tape-shaped material T constructed as described above will be explained with reference to FIGS. 2(a) to 5(d) and the flowchart of FIG. 5.

The solid line in FIG. 2(a) indicates that the tape-like material T is in a tensioned state, and the heater 7 of the heat bonding device 3 is maintained in a low preheated state that does not melt the adhesive interlining S, and both the feed rollers It, 12 indicates a stopped state.

Further, in step 1 of FIG. 5, an appropriate temperature setting value B is preset by the temperature setting digital switch 36 according to the material and thickness of the tape-shaped material T.

Now, when the one-sided decorative stitch sewing machine 19 is operated in FIG. 2(a), the tape-shaped material T is transferred to the material slack detection device 24 side while being sewn. Then, as shown in FIG. 2(b), the material T is transferred to one belt loop R by the required length and becomes slack, and together with the material T, the detection lever 21 rotates downward and the slack detection switch is turned. 23 is turned on, it is determined in step 2 of FIG. 5 that the material T is slack. Then, in step 3, CP
From U31 to interface 35 and D/A conversion circuit 4
1, the phase control circuit 42 is operated, and the heating heater 7 is switched from a preheating state to a heating state for melting the adhesive interlining S. In synchronization with this switching operation, the blower motor M1 is turned on in step 4 to blow hot air onto the tape-shaped material T.
sprayed towards. Then, the CPU 31 determines whether the temperature of the hot air that has passed through the tape-shaped material T by the temperature detector 37 is equal to or higher than the set value B set by the temperature setting digital switch 36, and when the temperature exceeds the set value B, In step 6, the feeding motor M2 for the tape-like material T is started to rotate in the normal direction. (See Fig. 2(b)) While the tape-like material T is being heated, both the upper and lower rollers 11.1
2, the adhesive interlining S of the tape-like material T has melted, so when it is pinched without being transferred by both rollers 11 and 12, the adhesive interlining S is transferred to the upper and lower fabrics W.
The adhesive seeps into the fabric W, and the fabric W is bonded.

As this heating operation and adhesion operation progresses, the slack detection device 2
When the tape-like material T in the tape-shaped material T is in a tensioned state as shown in FIG. 2(c), the tension detection switch 22 is turned on in step 7 of FIG. 5, and the heating heater 7 is switched to preheating in step 8. It will be done. In synchronization with this operation, the feed motor M2 is stopped in step 9, and the transfer of the tape-shaped material T is stopped.

After that, in step IO, the timer T1 sets the time from when the motor M2 stops until it is switched to the next reverse operation, and when the timer TI times out,
The reverse rotation signal from the interface 35 is input to the motor forward/reverse rotation stop circuit 40, and in step 11, the feed motor M2 is started in reverse rotation, and the tape-like material T is rotated as shown in FIG.
In d), the tape-like material T is transported in the direction of the arrow and sent back by an amount corresponding to the length of the section A from the heater 7 to the rollers 11 and 12. This motor reversal time is set by timer T2 in step 12.

Then, when the reverse rotation of the sending motor M2 is stopped in step 13, the blowing motor M2 is stopped in step I4.
1 is turned off, and then returns to step 1.

On the other hand, if the tape-like material T is not in a tensioned state in step 7, it is determined in step 15 whether the detected temperature of the temperature detector 37 is equal to or higher than the set value B, and if it is equal to or lower than the set value B, the process proceeds to step E6. The heating amount of the heating heater 7 is increased, and on the other hand, if it is equal to or higher than the set value B, the heating amount of the heating heater 7 is decreased (step 17), and in this way, the temperature of the hot air is controlled to an appropriate temperature. , the tape-shaped material T is heated and bonded under appropriate temperature conditions, and then the tension detection switch 22 of the tape-shaped material T is activated in step 7.
Returns to detection operation.

Now, in the embodiment of the present invention, the heating heater 7 and the air blowing mechanism 8 are arranged at a position apart from the tape-like material T, and the upper and lower rollers 11 do not heat the tape-like material T heated by the heating device 10. , 12, so that the melted adhesive interlining S is soaked into the upper and lower fabrics W, so that the heating member does not come into direct contact with the tape-shaped material T, and as a result, the tape-shaped material T is not burnt out. This can prevent the occurrence of fires and the like.

Further, in the embodiment of the present invention, after the heating bonding operation is completed and the tape-like material T is stopped, when reheating is performed next time, both the upper and lower rollers 11 and 12 are reversed to form the tape-like material T in the section A. The material T can be sent back and the adhesive interlining S which has been cooled and hardened can be reheated and melted, and as a result, the tape-like material T can be reliably bonded over its entire length.

Note that the present invention is not limited to the above-mentioned embodiments; for example, belts may be used in place of the delivery rollers 11 and 12, the delivery means and the clamping means may be constructed separately, or even a blower mechanism may be used. 8 may be omitted and the heating heaters 7 may be arranged facing each other at both upper and lower sides of the tape-shaped material T.

〔Effect of the invention〕

As detailed above, the present invention can reliably adhere the interlining to the fabric by melting the adhesive interlining sandwiched between the fabrics, and can also prevent burnout of the fabric and improve safety. There is an effect that can be done.

Further, the present invention provides a means for feeding the tape-shaped material located between the heating means and the feeding means back to a position where it can be heated by the heating means when the feeding means is stopped, so that the material can be cured after heating. The adhesive interlining can be reheated and sent to the material clamping means in a melted state.
This has the effect of eliminating uneven heat adhesion of the tape-like material fabric and improving reliability.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of the heat bonding device of the present invention, FIGS. 2(a) to (d) are front views for explaining the heat bonding operation, and FIG. 3 is a front view of the heat bonding device. 4 is a circuit diagram showing the control device, FIG. 5 is a flowchart showing the heat bonding operation, FIG. 6(a) is a perspective view showing the belt loop, and FIG. Figure (b) is a perspective view showing the state in which the belt loop is attached to pants, Figure 7 (a) is a perspective view before sewing showing the fabric and adhesive interlining forming the tape-like material, Figure 7 (b) FIG. 2 is a perspective view showing a completed state of the tape-like material. ■... Heating device, 2... Pressure bonding device, 3... Heat bonding device, 4, 9... Storage case, 5... Guide path, 6... Heating case, 7... . . . Heating heater as heating means, 8 . . . Air blowing mechanism, 1O . . . Guide passage, 11, 12 . Biasing spring, 4
0...Motor forward/reverse circuit, 42...Phase control circuit constituting heating/preheating switching control means, Ml...Blower motor, M2...Feeding drive motor, T...Tape-shaped material, S ...adhesive interlining, W...fabric. Patent applicant: Brother Industries, Ltd. No. 6 (a) No. 7 (a) Figure (b) Figure (b)

Claims (1)

[Claims] 1. A guide path for guiding a tape-like material sewn with an adhesive interlining sandwiched inside both front and back fabrics, and a guide path for heating the tape-like material at a position separated from the tape-like material. heating means for melting the adhesive interlining; feeding means for feeding out the tape-shaped material heated by the heating means; a material pinching means for squeezing the material so that it soaks into both the front and back fabrics; and a heating means capable of heating the tape-shaped material located between the heating means and the feeding means when the feeding means is stopped. 1. A heating bonding device for tape-shaped materials, characterized in that the device comprises a sending-back means for sending back to a position.