JPH0617680U - A knife holder for a cloth cutting device in an overedge sewing machine. - Google Patents

Abstract

(57) [Summary] [Purpose] Of a cloth cutting device provided on an edge stitch sewing machine that cuts a fabric and forms an overlock stitch on the edge of the fabric,
Make the knife installation angle adjustment work easy and quick. A lower knife support having a slide groove S for slidably supporting the lower knife 3 in a vertical direction and having a portion A facing the vicinity of the cutting edge of the lower knife 3 cut out or formed in a thin plate shape so as to be flexibly deformable. 4 and a lower knife setting table 2 which is installed on the machine frame of the sewing machine and supports the lower knife support 4 so as to be horizontally movable.
And the lower knife support 4 is screwed to the lower knife 3 at the tip.
Lower female pressing body 5 for fixing the lower knife to the lower knife support 4 and a screw to the lower knife support 4, and urge the vicinity of the cutting edge of the lower knife 3 at the tip end, depending on the screw tightening amount. And a lower knife urging body 6 that bends the lower knife 3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a knife holder of a cloth cutting device in an overedger sewing machine, and more particularly to a knife holder of a cloth cutting device in an overedger sewing machine capable of easily adjusting the installation angle of the knife of the cloth cutting device. Is.

[0002]

[Prior art]

 The overedging machine is provided with a cloth cutting device for cutting the cloth, and cuts the cloth and forms overlock stitches on the edges of the cut cloth. FIG. 3 is a view showing a cloth cutting device for an overedging machine. In the figure, reference numeral 1 is an upper knife, and this upper knife 1 is connected to a driving means (not shown), and is configured to make a vertical movement so as to draw an arc as shown by an arrow.

A lower knife 3 is provided at a position facing the upper knife 1 so that a cloth (not shown) can be cut by the upper knife 1. Further, 7 is a female fixed body, and this female fixed body 7 is provided with a slide groove S for supporting the lower knife 3 so as to be slidable in the vertical direction. The lower knife pressing body 5 that holds the lower knife 3 on the lower knife fixing body 7 holds the lower knife 3 in a vertically adjustable position.

On the other hand, 2 is a lower knife installation table, which is formed integrally with the lower knife fixing body 7 and has a through hole 8 into which a horizontal shaft 9 extending in the horizontal direction is inserted and which is attached to the screw 8a. Therefore, the lower female fixing body 7 is fixed so that its position can be adjusted in the horizontal direction. The lower knife installation base 2 is fixed to the machine frame of the sewing machine by a screw 2a and a screw hole (stupid hole) 2b larger than the screw diameter of the screw 2a.

In the cloth cutting device for the overedged sewing machine configured as described above, adjustment of the intersecting state of the upper knife 1 and the lower knife 3 at the time of cloth cutting is performed as follows.

When the total length of the knife is shortened due to re-sharpening of the lower knife, the height position of the lower knife 3 in the slide groove S of the knife fixing body 7 is adjusted so that the arm of the lower knife may be aligned with the upper surface of the needle plate. Is adjusted and the lower knife 3 is fixed by the lower knife pressing body 5 at an appropriate position. When adjusting the horizontal crossing width of the upper knife 1 and the lower knife 3, the horizontal shaft 9 is moved in the horizontal direction, and the lower knife support base 2 is moved to the lower female mount base 2 by the screw 8a at an appropriate position. It should be fixed to.

On the other hand, in adjusting the crossing angle of the upper knife 1 and the lower knife 3, the screws 2a are loosened to temporarily fix the lower knife installation base 2, and the lower knife installation base 2 is cut with a mallet or the like. It is performed by striking the side surface of and lowering the position of the lower knife support base 2 slightly.

[0008]

[Problems to be solved by the device]

 However, in the knife holder of the cloth cutting device in the conventional overedge sewing machine, skillful technique is required for adjusting the angular positions of the upper knife and the lower knife, which requires a time-consuming and complicated work. The angular position adjustment of the upper knife and the lower knife, that is, the angular position adjustment of the lower knife described above is performed by striking the side surface of the lower knife installation base 2 and moving the lower knife by about 0.03 mm. However, adjusting the angle of the lower knife requires a lot of skill and requires complicated and time-consuming work, resulting in a reduction in the sewing work efficiency.

[0009]

[Means for Solving the Problems]

 The knife holder of the cloth cutting device in the overedging machine according to the present invention has been made to solve the above-mentioned conventional problems, and a slide groove for supporting the knife holder so that the lower knife can be slid vertically. The lower knife support, which is provided with a notch in the part facing the blade edge of the lower knife, or is formed in a thin plate shape so that it can be flexibly deformed, and the lower knife support that is installed on the machine frame can be moved horizontally. The lower knife installation base that supports the lower knife, and the lower knife holder that is screwed to the lower knife holder and that fixes the lower knife to the lower knife holder so that the tip of the lower knife holder and the lower knife holder are screwed together. It is configured to include a lower knife urging body that is stopped and urges the vicinity of the cutting edge of the lower knife with the tip portion to bend the lower knife according to the screw tightening amount. is there.

[0010]

[Action]

 The knife holder of the cloth cutting device in the overedging machine according to the present invention changes the bending amount of the lower knife by adjusting the lower knife urging body with a screw, and thereby adjusts the angle of the lower woman. To do.

[0011]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. The same parts as those in the conventional example are designated by the same reference numerals, and duplicate description will be omitted. 1 and 2 are views showing one embodiment of a knife holder of a cloth cutting device in an overedging machine according to the present invention, FIG. 1 is a front view, and FIG. 2 is a sectional view taken along line ZZ shown in FIG. Is.

In FIG. 1, reference numeral 4 denotes a lower knife support, which is provided with a slide groove S for slidably supporting the lower knife 3 in the vertical direction and a horizontal shaft 9 (see FIG. 3). Is installed on the lower knife installation table 2 and supports the lower knife 3 movably in the vertical and horizontal directions.

Reference numeral 5 denotes a lower knife pressing member, which is fixed to the lower knife supporting member 4 by a screw and presses the lower woman 3 to the lower knife supporting member 4 at its tip. Further, the tip of the lower knife pressing body 5 faces the horizontal shaft 9 via the lower knife 3 and the lower knife support 4 as shown in the figure, and even if the lower knife 3 is urged by a strong force, It is designed not to deform 3 so as to bend.

Reference numeral 6 denotes a lower knife biasing body. This lower knife biasing body 6 is screwed to the lower knife supporting body 4 with a screw, has a U-shaped cross section as shown in FIG. The lower knife 3 is brought into contact with a position slightly displaced from the center of the blade width in the vicinity of the cutting edge of the lower knife 3, and the lower knife 3 can be biased by tightening the screw. On the other hand, the lower knife support 4 has a portion A (shown by a dotted line) facing the vicinity of the cutting edge of the lower knife 3 formed in a thin plate shape as shown in FIG.

In adjusting the crossing angle of the upper knife 1 and the lower knife 3 in the knife holder of the cloth cutting device in the overedging machine configured as described above, the lower knife urging body 6 This is performed by flexing the lower knife 3 together with the lower knife support 4 in a certain amount by tightening or loosening the screw.

The operation of adjusting the angle of the lower knife 3 is an easy operation by a driver, and the amount of bending of the lower knife 3 is a minute amount of about 0.03 mm, which affects the durability of the lower knife 3. Never give.

In this embodiment, the portion A of the lower knife support 4 that faces the vicinity of the cutting edge of the lower knife 3 is formed in a thin plate shape so as to be flexibly deformable, but this portion A is notched. You may let me.

[0018]

[Effect of device]

 As described above, the knife holder of the cloth cutting device in the overedging machine is provided with the slide groove for slidably supporting the lower knife in the vertical direction, and the portion facing the vicinity of the cutting edge of the lower knife is notched or bent. With a lower knife support that is deformably formed in a thin plate and a lower knife that is screwed to this lower knife support and urges the tip of the lower knife near the blade edge to bend the lower knife depending on the screw tightening amount. Since it is configured with a force body, adjustment of the crossing angle between the upper knife and the lower knife of the cloth cutting device can be performed easily and quickly by the driver, and the work efficiency can be improved. Become.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a knife holder of a cloth cutting device in an overlock sewing machine according to the present invention.

FIG. 2 is a sectional view taken along line ZZ of a knife holder of the cloth cutting device in the overedging machine shown in FIG.

FIG. 3 is an exploded perspective view showing a configuration state of a knife holder of a cloth cutting device in a conventional overedging machine.

[Explanation of symbols]

 1 Upper knife 2 Lower knife installation base 3 Lower knife 4 Lower knife support 5 Lower knife presser 6 Lower knife biaser S Slide groove

Claims (1)

[Scope of utility model registration request] 1. A knife holder for adjusting a knife installation angle of a cloth cutting device provided on an overlock sewing machine that cuts a fabric and forms an overlock stitch on an edge of the fabric, the knife holder being vertically movable in an arc shape. Of the cloth cutting device, which is fixed at a position facing the upper knife, has a knife holder that holds the lower knife, and has a slide groove that slidably supports the lower knife in the vertical direction, and faces the vicinity of the blade edge of the lower knife. A lower knife support with a notched part or a thin plate that can be flexibly changed, a lower knife mount that is installed on the machine frame of the sewing machine and supports the lower knife support so that it can move horizontally, and a lower knife support Screwed to the body and fixed to the lower knife support body to fix the lower knife to the lower knife support body at the tip, and screwed to the lower knife support body, and urge the tip of the lower knife near the blade tip. And bend the lower knife by the screw tightening amount. Female holder of the fabric cutting apparatus in overedge sewing machine which is characterized by being configured with a female urging body, the.