JPH0210994Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an improvement of a corner knife in an automatic welt sewing machine that is capable of V-cutting both opening ends of a plurality of diagonal pockets having different angles.

[Conventional technology and its problems]

In general, there are two types of pockets in clothing: right-angled pockets (see Figure 6) and diagonal pockets (see Figure 7).
Both ends of the opening must be V-cut using a pair of corner knives on an automatic welt sewing machine.

By the way, the automatic welt sewing machine for right-angled pockets requires only a pair of corner knives, so mechanically there is no major problem, but for diagonal pockets, multiple pairs are required as shown in Figure 8. An automatic welt sewing machine was used in which corner stitches were placed adjacent to each other on the guide rod, and the structure was adapted to V-cuts of right-angled pockets and several types of diagonal pockets with different angles.

However, since the slide shaft C supported by each of the guide rods had an integral corner knife connected to its upper end to which each triangular knife blade was removably attached, the slide shaft C and the corner knife were connected to each other. As the total length of the knife becomes longer, the tip of each corner knife often deviates slightly from the originally set position, and as a result,
There remained a problem that variations occurred in the sewing accuracy of the pockets.

[Means to solve the problem]

Therefore, the present invention is such that a corner knife is removably installed via a cradle on each of a plurality of pairs of slide shafts that can be raised and lowered by being supported by a guide linked to an actuating plate, thereby making it possible to make a V-cut at both ends of the opening of the diagonal pocket. In the corner knife of the automatic welt sewing machine, the corner knife is divided into at least a mounting member, a support rod, and a mounting frame for a triangular knife blade, and the support is attached to the mounting member removably fixed to the holder. The above-mentioned problems have been solved by connecting the rods so that they can be finely adjusted through long holes formed through one side of the rods, and by making it possible to fit the mounting frame onto the support rods.

[Effect]

This proposed corner knife allows you to easily fine-tune the mounting position of the corner knife using the long hole of the support rod, and by simply replacing the mounting frame with a different side inclination angle, you can easily adjust the mounting position of the corner knife using the long hole of the support rod. It has the effect of being easy to replace.

〔Example〕

Hereinafter, the configuration of the present invention will be described in more detail based on one embodiment shown in the drawings. 1 is a movable plate that can reciprocate in the front-back direction in Figure 1), and 2 is an operating plate that can be moved by a certain amount in the sewing direction (left-right direction in Figure 1) by a small cylinder SC fixed to the movable plate 1. That is. Reference numeral 4 designates a plurality of pairs of guides that move together with the actuating plate 2, and support a slide shaft 5 that can be raised and lowered by a rising cylinder UC. Furthermore, 3 is a corner knife 3 detachably attached to the upper end of the slide shaft 5.

The corner knife 3 is made up of at least three members: a mounting member 7, a support rod 8, and a mounting frame 9. First, a holder 6 is fixed to the upper end of the slide shaft 5 with a screw 5' or the like. A mounting member 7 is fitted and fixed via a set screw 6', and a support rod 8 having a pointed shaft 8a and a long hole 8c in the mold base plate can be finely adjusted in the horizontal direction via a screw 8b. It was designed to be installed on the Additionally, a separate U-shaped mounting frame 9 is provided on the base end side of the pointed shaft 8a of the support rod.
The triangular knife blade 10 can be attached to and detached from the inclined side surface of the mounting frame using a presser plate 11.

In this way, once the position of the support rod 8 mounted on the mounting member 7 is finely adjusted, the mounting member 7 can be removed from the cradle 6 when the triangular scalpel is damaged or worn out during sewing work. In addition, there is no need to readjust the mounting position of the support rod 8 itself by simply replacing the triangular knife blade 10 and mounting it on the pedestal 6 again.

Further, as shown in FIG. 5, for example, the corner knife of the present invention has a structure in which the tip shaft 8a of the support rod 8 is constructed separately from its base plate, and both can be freely removed using screws 8a' or the like. Therefore, if the tip shaft 8a to which the triangular knife blade 10 is attached is prepared in advance, the knife blade can be replaced more quickly.

[Effect of idea]

As mentioned above, the corner knife in the automatic welt sewing machine of the present invention is divided into at least three parts, and the supporting rod is movable in the horizontal direction. This makes it possible to correct any misalignment in the mounting position, and to accurately V-cut both ends of the opening of the pocket, making it possible to always obtain a uniform pocket.

Furthermore, according to the corner knife of the present invention, during use, the position of the support rod with respect to the mounting member already fixed to the pedestal is finely adjusted using a long hole and a screw, so the triangular knife blade could be damaged. The corner knife can be replaced accurately and quickly without having to re-correct the mounting position of the support rod. Furthermore,
All parts are common except for the mounting frame for the triangular knife blade, so
By simply changing the above-mentioned mounting frames with different side inclination angles prepared in advance, a V-cut corner knife for various diagonal pockets can be obtained, which is extremely economical, which cannot be expected from conventional corner knives of this type. It brings about excellent effects.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of the proposed automatic welt sewing machine, Fig. 2 is a partially cutaway front view showing an enlarged view of its main parts, Fig. 3 is its side view, and Fig. 4 is a corner knife. An exploded perspective view, FIG. 5 is an enlarged sectional view of main parts showing another embodiment, and FIG. 6 is a plan view of a right-angled pocket.
FIG. 7 is a plan view of the diagonal pocket, and FIG. 8 is a partially cutaway side view of a conventional corner knife. In addition, in the figure 3...corner knife, 4...guide,
5...Slide shaft, 6...Base, 7...Mounting member, 8...Support rod, 9...Mounting frame.

Claims (1)

[Scope of utility model registration request] A corner knife is removably installed via a cradle on each of multiple pairs of slide shafts that are supported by guides connected to the operating plate and can be raised and lowered, making it possible to V-cut both ends of the opening of the diagonal pocket. In the corner knife of the sewing machine, the corner knife is divided into at least a mounting member, a support rod, and a mounting frame for a triangular knife blade, and the support rod is attached to one of the mounting members removably fixed to the holder. A corner knife for an automatic welt sewing machine, characterized in that the corner knife is connected to the support rod so as to be finely adjustable through a long hole penetrated through the side, and the mounting frame can be fitted to the support rod.