JPH0148792B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tape cutting device mainly used in large industrial sewing machines such as bed stitching (binding) sewing machines.

[Conventional technology]

When binding a duvet, if the two side fabrics on the front and back sides are sewn directly together, the sewn parts of the duvet will be compressed vertically, impairing the functionality of the duvet. For this reason, a partition tape approximately 80 mm wide is sewn between the two pieces of side fabric to divide the inside of the side fabric vertically and horizontally to maintain the spacing.

Conventionally, the above work was done by attaching the partition tape to the side fabric, and then using a small sewing machine, a worker sewed the partition tape onto the side fabric, sewing the overlapping parts of the tape, or the bent parts (corners), etc. This is done by cutting it with scissors.

[Problem that the invention seeks to solve]

However, even though a small sewing machine is used, the work is similar to manual work, so there are problems in that work efficiency is extremely low and costs are high.

[Means for solving problems]

In the present invention, in front of the needle hole provided in the presser foot,
A guide groove is provided in the sewing machine body to guide the tape fed from the tape supply device to the back side of the presser foot, and when the presser foot is separated from the sewing surface, the back side of the presser foot is moved by a drive device. After moving the tape between the presser foot and the sewing surface from the front of the needle hole to the rear,
In addition to providing a cutter to cut the tape,
The above-mentioned conventional problem can be solved by attaching a fastening means behind the needle hole of the presser foot to fix the presser foot side of the tape that has crossed the needle hole when the tape is moved by the cutter. It is resolved.

[Effect]

The side fabric of the futon is supported on the support frame, the tape is loaded into the tape supply device, and the tape is sent out from the guide groove provided in front of the needle hole of the presser foot to the sewing surface in preparation, and the sewing machine is operated. The sewing machine moves relative to the side fabric to sew the tape onto the side fabric. At this time, as the sewing machine moves relative to the side fabric, the tape is sequentially sent out from the guide groove to the sewing surface. It can be sewn onto the side fabric.

When it is necessary to cut the tape, the sewing machine is stopped, the presser foot is raised and removed from the sewing surface, and the cutter is operated by the drive device. The cutter moves under the presser foot and cuts the tape between the presser foot and the sewing surface by moving it from the front of the needle hole to the rear. The fastening means attached to the rear of the needle hole of the presser foot fixes the presser foot side of the tape that has crossed the needle hole provided in the presser foot when the tape is moved by the cutter.

If the tape sewing operation is to be continued, the presser foot is lowered to the sewing surface and the sewing machine is operated again. At this time, the fastening means releases the fastening of the tape.

〔Example〕

1 to 3 show an embodiment of the present invention, in which 1 is a sewing machine body (sewing machine head). This sewing machine main body 1 constitutes the sewing machine together with a hook (not shown), and is attached to a frame 2 so as to be able to move up and down. It is designed to be able to move forward, backward, left and right while maintaining a predetermined posture relative to the object.

The sewing machine main body 1 is provided with a presser foot 4 having a needle hole 3 and a needle bar 6 with a needle 5 removably attached thereto.The needle 5 is moved up and down into the needle hole 3 by moving the needle bar 6 up and down. The sewing machine is configured to sew the side fabric, etc. that is pressed by the presser foot 4. The above-mentioned configuration of the sewing machine is conventionally known (for example,
Publication No. 25636, Special Publication No. 55-38160, Special Publication No. 1983
-8638 Publication).

In the present invention, the sewing machine main body 1 is provided with a tape T supply device 7 and a cutter 8, and a tape T supply device 7 and a cutter 8 are provided in front of the needle hole 3 of the presser foot 4 (on the right side in FIG. 3). While the guide groove 9 is formed,
A fastening means 10 for fastening the tape T is provided behind the needle hole 3.

The tape supply device 7 includes a removably mounted shaft rod 12 on a bracket 11 that supports a rolled tape T, and the tape T passes through a guide 13 fixed to the sewing machine main body 1. From the guide groove 9 formed in the presser foot 4 to the back side (lower side) of the presser foot 4
It is said that the structure is guided by.

The cutter 8 is attached to the tip of a rotating arm 15, which is rotated by a drive device 14 such as a hydraulic or pneumatic actuator, with a mounting shaft 16, as shown in FIGS. 4 and 5. It is allowed to swing freely in the width direction, and is urged toward the blade side by a spring 17 via a pin 18. This cutter 8 cuts the tape T after the lower side of the presser foot 4 is moved from the front guide groove 9 toward the rear fastening means 10 by the drive device 14.
It has a configuration in which a replaceable blade 20 is attached to a sheath 19 having a U-shaped cross section. A set screw 21 is screwed into a hole 22 into which the spring 17 and pin 18 are inserted to prevent them from coming off.

As shown in FIGS. 6 and 7, the fastening means 10 includes a fastening needle 24 planted in a plate 23, and is arranged on the opposite side of the guide groove 9 with the fastening needle 24 facing downward. In this state, it is attached to the presser foot 4 with screws 25. This fastening means 10 receives the tape T moved by the cutter 8 and
In addition to the above, for example, a suction port connected to a suction device is provided on the presser foot 4, etc., and the tape T is suctioned to the suction port. It is also possible to temporarily fix the tape T by using the tape T.

In the figure, 26 is a mounting part for fixing the presser foot 4 to the support rod 27, 28 is a mounting part for mounting the rotating arm 15 to the drive device 14, and 29 is a mounting part for mounting the drive device 14 to the sewing machine body 1. This is a mounting member.

Next, the operation of the tape cutting device for a sewing machine according to the present invention configured as described above will be explained.

FIG. 1 shows the tape T being sewn onto the side fabric G. The tape T is passed from the tape supply device 7 through the guide 13 and the guide groove 9 to the presser foot 4.
It is sent out to the bottom side and sewn to the side fabric G. At this time, the sewing machine main body 1 is lowered to press down the tape T on the side fabric G on the sewing surface H with the presser foot 4, and the cutter 8 is retracted to the guide groove 9 side.

If sewing of the tape T progresses and it becomes necessary to cut the tape T, stop the sewing machine and raise the needle 5 upward from the needle hole 3 (normally, the sewing machine
), raise the sewing machine body 1 as shown in Fig. 3, and move the presser foot 4 to the sewing surface H.
After lifting it from the ground, the drive device 14 is activated. As a result, the cutter 8 moves the locking needle 24 under the presser foot 4 from the front to the rear of the needle hole 3, that is, from the guide groove 9 side.
The end of the tape T on the presser foot 4 side is fixed to the fixing needle 24, and then, as the tension of the tape T increases, the mounting shaft 16 is rotated against the elasticity of the spring 17. Rotate to the fulcrum and apply the blade diagonally to the tape T to cut it. After cutting the tape, the cutter 8 immediately returns to its original state.

When sewing the tape T onto the side fabric G again, lower the sewing machine body 1 to the state shown in Figure 1,
Press the tape T with the presser foot 4 and operate the sewing machine. As the needle 5 moves up and down, the tape T, together with the side material G, moves relative to the left with respect to the presser foot 4 in FIG. The end will be automatically removed from the fastening needle 24.

〔Effect of the invention〕

As explained above, in the tape cutting device for the sewing machine according to the present invention, the cutter moves the tape across the needle hole formed in the presser foot, and the end of the tape on the guide groove side is fixed to the fastening means. The structure is such that the end of the tape remains in the specified state without shifting sideways, bending, or breaking. , the sewing machine body can be lowered immediately and the next sewing operation can be started. Moreover, since there is no need for workers to bother with the process, automation can improve work efficiency and reduce the manufacturing cost of futons and the like.

[Brief explanation of drawings]

Fig. 1 is a side view of the main parts of a sewing machine equipped with a cutting device according to the present invention in a sewing operation state, and Fig. 2 shows a state in which a cutter is rotated under a presser foot that has been raised together with the sewing machine main body. 3 is a side view showing the sewing machine body in its raised state, 4 is an external view showing how the cutter is attached to the rotating arm, 5 is a cross-sectional view of the same, and 6 is the presser foot. FIG. 7 is an external view showing a state in which the fastening means is attached to the main body, and FIG. 7 is a side view of the same. 1... Sewing machine body, 3... Needle hole, 4... Presser foot, 7...
tape supply device, 8... cutter, 9... guide groove, 10
...Fixing means, 14...Drive device, T...Tape.

Claims (1)

[Claims] 1 A guide groove is provided in front of the needle hole provided in the presser foot to guide the tape fed from the tape supply device to the back side of the presser foot, and the sewing machine body has a guide groove that guides the tape fed from the tape supply device to the back side of the presser foot. , a cutter is provided which cuts the tape after moving the back side of the presser foot by a drive device to move the tape between the presser foot and the sewing surface from the front of the needle hole to the rear;
Cutting tape in a sewing machine characterized in that a fastening means is attached to the rear of the needle hole of the presser foot for fixing the presser foot side of the tape that has crossed the needle hole when the tape is moved by the cutter. Device.