JPH04102977U - sewing machine presser foot plate - Google Patents

Abstract

(57) [Summary] (with modifications) [Purpose] To reduce the frictional resistance between the part to be sewn and the presser plate during sewing. [Structure] A presser plate A of a sewing machine that holds down the workpiece to prevent the workpiece from swinging unnecessarily during sewing. The structure includes one or more through holes 3, and an air flow pipe P connected to the through holes and sending air from an air supply source to the through holes and below the presser plate of the sewing machine. By blowing air between the board and the workpiece,
It reduces the frictional resistance between both of them, and solves problems such as poor seam pitch, misalignment, misalignment, and unsewn defects caused by this frictional resistance.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is designed to prevent the workpiece from swinging unnecessarily during sewing. Regarding the presser plate of the sewing machine, which serves as the presser foot, for details, please refer to the The invention relates to presser plates for sewing machines.

0002

[Background of the idea]

To prevent the workpiece from swinging unnecessarily due to the driving of the sewing needle, etc. The presser plate of the sewing machine, which serves as the presser foot, is constructed as shown in FIG. In Figure 2, M is a sewing machine, N is a sewing needle, and A is a sewing machine installed near the sewing needle N. This is a presser plate for a sewing machine that can be cut.

0003 As is well known, the presser plate A of the sewing machine is placed on the workpiece that moves as the sewing progresses. It presses the object to be sewn while sliding on the upper and lower surfaces. By the way, there is a sewing machine that presses the workpiece by sliding on the upper and lower surfaces of the workpiece. When sewing multiple workpieces stacked on top of each other on presser plate A, use the following procedure. cause inconvenience.

0004 Figure 3 shows an example of sewing a label by overlapping multiple sewing objects. It is a sectional view showing a state. In FIG. 3, W is a cloth, and R is a label sewn onto the upper surface of the cloth. Further, 1 is a throat plate, and 2 is a hole 1a formed in the throat plate 1 as shown by the arrow. The fabric W and the label R as the objects to be sewn are moved as the sewing progresses. (leftward in the figure).

[0005] When the workpieces (W, R) are moved by this feed dog 2, the workpieces located above If the object (label R) is, for example, nylon coated with resin, frictional resistance If the fabric is large, the frictional resistance between the fabric W and the label R is The frictional resistance with the presser plate A of the sewing machine may be greater. When such a phenomenon occurs, when the feed dog 2 moves the workpieces (W, R) downward While the workpiece (fabric W) located at is fed by the appropriate amount by the feed dog 2, The movement of label R in contact with presser plate A of the sewing machine causes frictional resistance with presser plate A of the sewing machine. Therefore, the problem is that it is blocked and does not move the predetermined amount of movement, that is, the amount of movement decreases. A situation arose.

[0006] This may cause the sewing position of the label R to be misaligned or the stitch pitch to be incorrect. or as shown in Fig. 4, the workpiece (fabric W) located below may be Sewing is distorted, resulting in so-called misalignment defects, which significantly deteriorates the quality of the sewing. This caused the inconvenience of having to do so. In addition, if the above-mentioned phenomenon occurs strongly, presser plate A of the sewing machine and label R may become attached. If the label R is not moved and the label R is not sewn to the fabric W, This caused a serious inconvenience.

[0007] In order to solve this inconvenience, it is necessary to Apply ester oil or water to reduce the frictional resistance, and then sew it by hand. The troublesome work of inserting it under the presser plate A was unavoidable.

[0008]

[Summary of the idea]

This idea was made to solve the above-mentioned conventional problems, and it The plate has a through hole leading to the bottom surface of the holding plate, and is connected to this through hole to allow air to flow from the air supply source. An air flow pipe that sends air to the through hole and below the presser plate of the sewing machine. This is done by blowing air between the presser plate of the sewing machine and the workpiece located above. This is an attempt to solve the above conventional problems by reducing the frictional resistance between the two. .

[0009]

[Example of idea]

An embodiment of this invention will be described based on the drawings. In addition, in the same place as the conventional example, The same reference numerals are used to omit redundant explanation. FIG. 1 is a diagram showing an embodiment of a presser plate of a sewing machine according to this invention. In Fig. 1, A is the presser plate of the sewing machine, and 3 is the penetrating plate that reaches the lower surface of this presser plate A. It is a through hole. (Two are formed in this example) P is an air flow pipe whose tip is connected to the through hole 3, and the rear end is not shown. connected to an air supply source. This allows the air flow pipe P to move as shown by the arrow. Air can then be sent to the through hole 3.

0010 Also, Pa is designed to send air below the rising part A1 of the presser plate A of the sewing machine. As shown in the figure, this is a curved portion that curves downward. According to the presser plate of the sewing machine configured as described above, the workpiece located above There is no air between the top surface of the product (label R in the figure) and the bottom surface of the presser plate A of the sewing machine. This makes it possible to reduce the frictional resistance between these two.

[0011] Note that since the air is blown out downward, the sewing needle does not cause the object to be sewn to swing. There is no possibility that the holding action will be reduced. Furthermore, in the above embodiment, the holding plate A has a rising portion A1 at the end thereof. However, it goes without saying that this also applies to the holding plate A that does not have the rising part A1. stomach. In that case, the overall configuration will be the same as in FIG. 1 with A1 and Pa deleted.

0012

[Effect of the idea]

As explained above, the presser plate of the sewing machine according to this invention is and the upper surface of the workpiece located above so that air is ejected downward. Because of this structure, the presser plate of the sewing machine and the upper It is possible to reduce the frictional resistance with the workpiece located at the Poor seam pitch, misalignment, misalignment, and unsewn defects caused by friction. It is possible to eliminate such inconveniences and improve sewing quality. Both make it possible to improve work efficiency.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of a presser plate of a sewing machine according to the invention.

FIG. 2 is an external perspective view showing a presser plate of a conventional sewing machine.

FIG. 3 is a sectional view showing a presser plate of a conventional sewing machine during sewing.

FIG. 4 is a cross-sectional view showing a misalignment defect.

[Explanation of symbols]

A Sewing machine presser plate 3 Through hole P Air flow pipe

Claims (1)

[Scope of utility model registration request] Claim 1: In order to prevent the workpiece from swinging unnecessarily during sewing, a presser plate of a sewing machine that holds the workpiece is provided with one or more through holes extending to the lower surface of the presser plate. and an air flow pipe connected to the through hole and sending air from an air supply source below the through hole and the presser plate of the sewing machine.