JPS6056514B2 - Sewing jig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a jig used during sewing using a sewing machine, and particularly for sewing a curved part of a cut sewing member to a straight part of a cut sewing member. Regarding structure.

Generally, when sewing trim covers, etc. that are placed over the cushioning material of automobile seats, sewing parts such as the main part and side parts (hereinafter simply referred to as sewing parts) that are cut into a predetermined shape are made using a sewing machine. However, in this case, as shown in the first diagram, a sewing member having a curved end is sometimes sewn to a sewing member a having a straight end, as shown in the first diagram. .

This is because it is necessary to make the sewing member a have a predetermined bulge relative to the sewing member a after sewing is completed. By the way, in the case of the above-mentioned sewing work, conventionally, sewing members a and b are overlapped with sewing start ends c and d of the sewing members a and b in a substantially coincident state, and are sandwiched between the presser foot and the feed dog of the sewing machine, and then the sewing start ends c and d are Insert the sewing machine needle into c and d.

Then, after aligning the curved edge of the sewing member a with the straight edge g of the end of the sewing member a by a short sewing length, and sewing this aligned part, the curved end is again aligned with the straight edge g of the sewing member a. By repeating sewing several times while aligning the edges with a small sewing length, the sewing ends e,
It is sewn up to f. For this reason, although a high degree of skill and careful attention are required, there are many variations among workers, making it impossible to perform sewing work with a good yield. In view of the above-mentioned conventional situation, the purpose of the present invention is to
Sewing ends of a sewing member having a straight/linear portion and a sewing member having a curved portion are overlapped with each other with their starting ends substantially aligned and sandwiched between the presser foot and the feed dog of the sewing machine, and the sewing member having a curved portion is sewn at the end. By simply driving the sewing machine after holding the sewing member with the clip, the sewing member having a straight part moves straight in the sewing direction of the sewing machine, and the sewing member having a curved part swings, so that the sewing member having a curved part moves against the straight part of the sewing member. To provide a sewing jig that can copy and sew a curved portion of another sewing member. Hereinafter, details of embodiments of the jig according to the present invention will be explained with reference to FIGS. 2 to 4.

As shown in the second diagram, the jig 1 of the present invention includes a guide board 2 fixed on a table i of a sewing machine, and this guide board 2 is attached to mounting screws 3, 3, etc. seated on the table i. It is removably positioned in front of the sewing machine in the sewing feed direction (same as the direction of arrow X), which is composed of the presser foot j and the feed dog k of the sewing machine.

Further, this guide board 2 is in the form of a flat plate arranged in a downward slope toward the sewing feed direction of the sewing machine, and the sewing member a cut between it and the table i of the sewing machine holds the guide board 2 between It is moved while intervening. A guide end surface 4 is located on one side of the guide board 2 and extends in a straight line along the sewing feed direction of the sewing machine on one side in front of the feed dog k of the sewing machine.
It is arranged between the table i and the guide substrate 2 while being fixed thereon. Further, a guide hole 5 is bored in the guide board 2, and the guide hole 5 is a slender elongate meandering in a predetermined shape along the curved part of the sewing member b while being positioned in the sewing feed direction of the sewing machine. It is shaped like this. A clip 6 is movably attached to the guide hole 5.

That is, the clips 6 can be opened and closed with each other via the support shaft 7 as shown in the third figure! It has a pair of clamping arms 8, 9 supported by the clamping arms 8, 9, and the clamping arms 8, 9 are urged toward each other in the closing direction by a spring (not shown) installed between the clamping arms 8, 9. The tip of the clip 6 is opened by pressing the rear part of the support shaft 7 of the clamping arms 8 and 9 while resisting the elastic force of the spring. the clamping arm 8;
A pin 10 is mounted on one of the clamping arms 8 of 9 to be slidably mounted in the guide hole 5. A winding shaft 11 is rotatably suspended horizontally at the raised end of the guide board 2 as shown in 4 in the second figure, and the other end of a string 12, one end of which is fixed to the clip 6, is attached to the winding shaft 11. is wrapped around this string 1
The winding end of No. 2 is fixed to the winding shaft 11.

The string 12 has a developed length sufficient for the clip 6 to slide between one end of the guide hole 5 and the other end. A bobbin 13 is fixed to one end of the winding shaft 11.
A weight 15 is fixed to the other end of the hanging cord 14, which is wound around the hanging cord 14 with one end fixed to the . A through hole 16 is bored in the table i placed directly below the bobbin 13,
The intermediate portion of the hanging string 14 from which the weight 15 is suspended passes through the through hole 16. In addition, the feed dog k
A clamping member 17 is fixed to the tip of the guide board 2 located on the side with a set screw 18, and a local part of the edge h of the seam allowance of the sewing member b during sewing is fixed to the clamping member 17 in the direction of the arrow x. It is clamped in a state where it is moved to.

According to the above-described embodiment configured as above, the sewing member a having the sewing portion having a straight portion is passed between the table i and the guide substrate 2, and the sewing member b having the curved portion is passed on the guide substrate 2. Allotted.

Then, the sewing start end d of the edge h of the sewing member b is held between the clamping members 17, and the sewing end f of the sewing member b is held between the clips 6. At this time, sewing member a
The straight edge g of is brought into contact with the guide end surface 4. Also,
Sewing start ends C and d of sewing members A and b are sandwiched between presser foot j and feed dog k. By driving the sewing machine after setting the sewing members A and b in this manner, the sewing members A and b are moved in the direction of the arrow X by the elastic pressing of the presser foot j and the feeding drive of the feed dog K. An upper thread (not shown) from a needle ' that is intermittently transferred to the feed dog k and moves up and down in synchronization with the feed dog k, and a lower thread from a bobbin (not shown) attached to the bottom of the feed dog k. It is sewn by a sewing machine. By the way, when the sewing member b held by the clip 6 is sewn and fed in the direction of the arrow X, the clip 6 draws a trajectory regulated by the guide hole 5.

That is, the clip 6 is moving toward the arrow X while receiving resistance from the weight 15.
Since the pin 10 is moved along the guide hole 5 as it moves in the direction, the clip 6 is moved in the direction of the arrow Y while being swung in the direction of the arrow Y. Therefore, the sewing member b is sewn while being swung in the direction of the arrow Y, with the curved end edge h of the end of the sewing member b substantially aligned with the straight end edge g of the end of the sewing member a.

As explained above, according to the present invention, the sewing start end of the sewing members to be sewn together is held between the presser foot and the feed dog of the sewing machine, and the sewing end end of the sewing member having a curved portion is held between the clips. After that, just by driving the sewing machine, the curved part of another sewing part is sewn by following the straight part of the sewing part, so uniform sewing is always ensured and reliable sewing work is performed efficiently. In addition, since the clip is guided directly through the guide hole, the structure for swinging the sewing member having a curved portion is simplified by simply planting a pin movably fitted into the guide hole in the clip. It is possible to provide a mechanism with a lower load on the sewing feed drive of the sewing machine, and it is possible to provide reliable rocking motion at low cost.

Furthermore, since the guide hole is arranged in front of the sewing machine in the sewing feed direction, a predetermined shape corresponding to the curved portion of the guide hole can be easily indexed.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a sewing member having a general straight line portion and a sewing member having a curved portion; 3 is a cross-sectional view taken along the line ■-■ in FIG. 2, and FIG. 4 is a cross-sectional view taken along the line ■-■ in FIG. 1... Jig, 2... Guide board, 4...
...Guide end face, 5...Guide hole, 6.
...Clip, A, b...Sewing member.

Claims (1)

[Claims] 1. In a sewing jig that uses a sewing machine to sew a curved part of another sewing member onto a straight part of the sewing part, the sewing jig is provided in front of the sewing machine needle and extends in the sewing feed direction of the sewing machine to attach the straight part of the sewing member to the straight part of the sewing part. a guide board that faces the sewing machine table on the guide end face, and an elongated guide provided on the guide board that extends in the sewing feed direction of the sewing machine and meanders in correspondence with the curved portion of the sewing member. A sewing jig comprising: a hole; and a clip that is slidable along the guide hole and clamps the terminal end of the sewing member.