JPS6343119B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a lining fixing device in an automatic zipper attaching machine for sewn products.

[Conventional technology]

For example, in order to sew a zipper (fastener) to a sewn product such as a skirt, a step is taken in which the lining, on which the zipper has already been sewn, is sewn to the outer material. Since each of these steps requires extremely skill and man-hours, an automatic skirt zipper attaching machine has been proposed. FIG. 5 shows a cutaway perspective view of essential parts of an example of this conventional proposal. M is the sewing machine head, Ma is the sewing machine bed,
NP indicates the throat plate and N indicates the needle. F is a fixing device equipped with a fixing plate Fa disposed on the throat plate NP, 1 is the lining of the skirt to which the zipper Z is sewn in advance, and 2 is the outer material of the skirt. Fixing device F is throat plate NP
Sewing direction Y of zipper Z on top and direction X perpendicular to it
This fixing device F is attached to the shaft so that it can be moved to the end of the plunger P of the solenoid SOL by rotating the shaft 4 fixed to the other end of the arm 3 which is pivotally connected with a pin to the tip of the plunger P of the solenoid SOL. A pair of presser feet 6 are provided by a pair of arms 5 (one of which is shown broken) fixed to both ends of the zipper 4 to press down the zipper Z portion and both sides of the outer material 2, respectively.

[Problem that the invention seeks to solve]

Skirt outer material 2 to lining 1 with zipper Z sewn together
are aligned with the center line of the zipper Z by visual inspection, and are set overlapping each other, and both sides of the zipper Z are sewn together. However, it is extremely difficult to align the outer fabric 2 and the lining 1, and requires skill. , as shown in Figures 6 and 7, the zipper covering part of the outer material 2 is wavy as shown in 2a, and the zipper Z material itself is also somewhat wavy, so the waving and the zipper Z after both are sewn together. Misalignment of the center line CL with respect to the seam may occur, impairing the sewing quality, and if the amount of misalignment is large, the slider Za of the zipper Z, the stopper Zb, and the needle N should be adjusted as shown in the back view of FIG. There was a possibility of needle breakage due to interference with the needle.

The present invention has been made in view of the problems of the conventional proposals as described above, and eliminates the above-mentioned drawbacks, makes positioning including centering easy and reliable, reduces the number of man-hours required, and improves sewing quality. The object is to provide a fixation device of this kind with which improvements can be achieved.

[Means for solving problems]

Therefore, in the present invention, in order to apply appropriate tension to the zipper part sewn to the lining and to perform accurate positioning, a pin for engaging the pull hole of the zipper slider is provided in the front part of the fixing plate of the fixing device. A presser foot link is provided on the rear side of the front end of the throat plate for temporarily restraining the taut lining.

〔Example〕

The present invention will be explained below based on examples. FIG. 1 shows a schematic diagram of essential parts of an embodiment of a lining fixing device according to the present invention. Components that are the same (equivalent) to those of the conventional example shown in FIGS. 5 to 8 are indicated by the same reference numerals, and redundant explanation will be omitted. The feature of this embodiment is that a pin 7 is provided protruding from the front end of the fixing plate Fa of the fixing device F, and a part of the lining is temporarily attached to the back side of the end of the throat plate NP on the side near the operator. This is because a presser foot link 10 for restraining is provided.

The pin 7 is intended to be engaged with a hole in the puller of the slider Za of the zipper Z sewn to the lining 1, and the presser foot link 10 is intended to be engaged with a pivot 9 provided on the back side of the throat plate NP. When the operator operates the foot pedal 12, the air cylinder 8 whose one end is pivotally attached to the back of the throat plate swings through the limit switch 11 and the solenoid valve 13, thereby linking a part of the lining 1. 10 tip rubber pad 10a
It can be pressed to the back of the throat plate to bind or release it. Compressed air is supplied to and discharged from the cylinder 8 from an appropriate compressed air source 14 through each pipe 15a, 15.
b, 15c. Further, the solenoid SOL for raising and lowering the presser foot 6 is configured to be operated in conjunction with the second depression of the foot pedal 11 by a circuit not shown.

Next, the operation/effect will be explained. FIG. 2 is an explanatory diagram of the operation of this embodiment. First, as shown by arrow A, the zipper Z is sewn to the lining 1 in advance.
Engage the pull hole of slider Za with pin 7,
Pull the lining 1 in the direction of arrow B to create appropriate tension and set it by hand so as to wrap it around the throat plate NP. At this time, the position of the mark MK projected onto the center line CL of the zipper Z is aligned with the mark light 16 disposed on the sewing machine frame. FIG. 3 shows a top view of essential parts of this operation.

Next, when the foot pedal 12 is depressed one step, the limit switch 11 is closed and the solenoid valve 13 is closed.
, presser foot link 1 is activated by cylinder 8.
The tip rubber pad 10a of 0 rotates in the direction of arrow C, and temporarily restrains and fixes the lining 1 in the tensioned state. After the lining 1 has been set, the outer material 2 is then set in a predetermined position in the direction of arrow E in the figure.
Further press the foot pedal 12 (second step)
Then, the presser foot 6 descends and presses the outer material 2 and the lining 1. At the same time, the solenoid valve 13 is activated by the limit switch 11, and the presser foot link 10 rotates in the direction of arrow D, pressing the outer material 2 and the lining 1. release the restraints of

As described above, the stitched portion of the zipper Z is appropriately tensioned, undulations, wrinkles, etc. are eliminated, and an accurate centering position is ensured, allowing the next stage of zipper attachment work to proceed.

Figure 4 shows the lining restraint part G in Figure 2,
This suggests an example in which the restraining/releasing operation is automated using the photoelectric switch 17 or the like without requiring the operation of the foot pedal 12.

Although this embodiment has been described with respect to the case of attaching a zipper to a skirt, the principle of the present invention is not limited thereto, but can also be applied to sewn products having similar conditions.

〔Effect of the invention〕

As explained above, according to the present invention, when automatically attaching a zipper to a sewn product, the zipper seam is appropriately tensioned to enable accurate center positioning. This makes it possible to reduce man-hours and improve sewing quality.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of the main parts of an embodiment of the present invention, FIG. 2 is an explanatory diagram of its operation, FIG. 3 is a diagram of the zipper centering operation, and FIG. 4 is another diagram of the part G in FIG. Embodiment, FIG. 5 is a perspective view of essential parts of an example of a conventional device, and FIG.
The figure and FIG. 7 show a conventional outer zipper cover part,
FIG. 8, which is an explanatory diagram of the wavy state of the zipper material, is a back view of a conventional zipper seam. 1...Lining, 2...Outer material, 6...Presser foot, 8...
... Air cylinder, 10 ... Presser foot link, 12 ...
...Foot pedal, 13...Solenoid valve, 16...Mark light, F...Fixing device, Fa...Fixing plate, N
...needle, NP...throat plate, SOL...solenoid, Z
...Zippa, Za...Slider.

Claims (1)

[Claims] 1. In an automatic zipper attaching machine for sewn products, which is equipped with a lining fixing device having a presser foot and a fixing plate, a zipper slider pull hole engaging pin is provided protrudingly in front of the fixing plate, and A lining fixing device for a sewing machine, characterized in that a presser foot link for temporarily restraining and fixing a part of the lining is provided on the back side of the end.