JPS5977889A - Embroidering cloth press apparatus of sewing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a presser foot device for sewing machine embroidery.In hand-operated machine embroidery, cloth is stretched over an embroidery hoop, and this is attached to the lower end of the presser foot of the sewing machine. Place one piece between the attached embroidery presser foot and the throat plate, lower the feed dog to the inactive position, and operate the sewing machine with the fabric held between the presser foot frame and the throat plate.
A desired embroidery pattern is created by moving the embroidery hoop freely by hand.

Therefore, the presser foot must first be positioned inside the hoop with the cloth stretched, to prevent thread breakage and stitch clogging during embroidery silicic acid.
Many operations for attaching and detaching the hoop occur, such as when changing the position of the fabric relative to the hoop or when embroidery is completed. For this reason, the hoop needs to go under the presser foot several times, but in order to make the hoop go under, the presser foot attached to the lower end of the presser foot is raised, and the hoop is placed between the presser foot and the throat plate. It is necessary to secure a space for the people to pass through.

In the conventional embroidery presser foot, the rear end of the presser foot is swingably attached to a mounting frame to which one presser bar is fixed, and a spring is activated that urges the presser foot downward and presses the fabric. When using a presser foot like this, the presser foot is constantly pushed downward by one spring, so when the presser foot is pulled up, the presser foot is pushed downward one turn by the spring. There is not enough space between the presser foot and the needle bar,
In some cases, the downward rotation angle is increased to increase the pressing force of the presser foot, and the presser foot remains in contact with one piece of the fabric even when the presser foot is pulled up. Special feature for attaching and detaching the hoop - The presser foot must be raised by hand each time, which is extremely time-consuming and causes a decrease in embroidery work efficiency.

This invention is based on the above-mentioned conventional sewing machine embroidery machine presser foot. (
Since the mounting frame to which the presser foot is attached also moves upward, the object of the present invention is to provide a fabric presser device that can provide a significantly wider space between the fabric presser foot and the throat plate than in the past.

In other words, this invention has a mounting frame fixed to the lower end of the sewing machine's presser foot that can be freely attached and detached. A spring is provided to press the cloth on the throat plate, and when the presser foot is raised, a spring is provided to press the cloth on the throat plate. When the presser foot is lowered, the presser foot is rotated one inch downwards from the spring to press the fabric on the throat plate. To provide a presser foot device for sewing machine embroidery, which is equipped with an operating member that interlocks with the presser foot so as to do the following.

The following is an example in which the details of the invention are shown in the accompanying drawing numbers]
The explanation will be based on this.

In FIG. 1, 1 is an arm that is the main body of the sewing machine, 2 is a needle bar that is attached to the arm 1 so that it can be raised and lowered, and is driven up and down by a known drive device 1, and 3 is a presser bar. It is raised or lowered by a known mechanism.

4 is the mounting frame, remove the normal presser foot at the lower end of presser bar 3,
After that, it is fixed using screws 5 for attaching the entire presser foot.

Reference numeral 6 denotes a cloth presser whose rear end is swingably attached to the lower end of the mounting frame 4 by a horizontal shaft 71. The front part of this presser foot 6'
As shown in the figure], it is bent downward, and its lower end is bent to the left as seen from the silicate person as shown in Fig. 1, forming the presser foot part 8. Inverted trapezoid 1 seen from
The needle may be bent, and an indicator 9 indicating the position of the needle may be provided at the center of the upper surface, or the shape may be arbitrary.

Reference numeral 10 in FIGS. 2 and 3 is a spring that urges the presser foot 6 downward. Its tip 11 is engaged with the upper part of the presser foot 6, and its rear end 12 is attached to a screw on the rear side of the mounting frame 4. It is supported by an adjustment screw 13 screwed into the hole, and the spring 1o is
Adjust the elasticity of

Reference numeral 14 denotes an operating member, whose rear end is rotatably attached to the upper part of the mounting frame 4 via a horizontal shaft 15. A downward projecting piece 16 is provided at the rear end of the working member 14, and this projecting piece 16 is brought into contact with the upper front part of the upward projecting piece 17 at the rear end of the presser foot 6.

Reference numeral 18 in FIGS. 1 and 2 is a stopper fixed to the lower part of the arm 1, and is located at a position where it comes into contact with the upper end of the operating member 14 when the presser bar 3 is pulled up.

In addition, 19 in the figure is a sewing machine needle fixed to the lower end of the needle bar 2;
20 is a needle plate fixed to a sewing machine bed (not shown); 21 is a needle hole provided in the needle plate 201; 22 is a hoop consisting of an inner frame 23 and an outer frame 24; It is a cloth sandwiched between the outer frame 24 and the outer frame 24.

The cloth presser device of the present invention has the above-mentioned configuration, and in FIGS. 1 and 2, one cloth presser part 8 is inserted into the hoop 22 on which the cloth 25 is stretched, and the cloth presser part 8 and throat plate 2o are used to press the cloth. 25 and move the hoop 22 by hand while operating the sewing machine to perform machine embroidery.

When using silicic acid as described above, the presser bar 3 is pressed down by a spring (not shown), and the action member 14 faces upward, so the protruding piece 16 faces diagonally forward, and therefore the protruding piece 17 of the presser foot 6 also diagonally. It is positive.

Now, stop the operation of the sewing machine and pull up the presser bar 3 against the spring (not shown) by operating a lever (not shown). 18+, but since the mounting frame 4 continues to rise, the action member 14 becomes almost horizontal as shown by the chain line in FIG.
The protruding piece 16 at the rear end pushes the protruding piece 17 of the presser foot 6 backward.

As described above, the presser foot 6 is pushed backward by the protrusion 16 of the action member 14, and the presser foot 6 is rotated significantly upward about the shaft 7 as shown by the chain line in FIG. The presser bar 3 is moved upward by a known lever mechanism [since the presser bar 3 is fixed, the presser bar 3
And the presser foot 6 remains raised.

Therefore, a large space is created in the lower part of the presser foot 6, allowing the hoop 22 to pass through freely.

Next, when the presser bar 3 that has been pulled up as described above is lowered by one lever operation, the pressure on the action member 14 caused by the stopper 181 is released, and the presser foot 6 is rotated downward by the action of the spring 10 and then The projecting piece 17 at the end is the acting member 1
Push the protrusion 16 of No. 4 forward to return to the state shown in FIG.

In this invention, as described above, the embroidery presser foot 6 or the presser bar 3 is moved up and down in conjunction with each other so that the up and down movement is swung. The presser foot 8 presses the cloth 25 to create an embroidery line, and when the presser foot 3 is raised, the presser foot 6 automatically moves upwards one inch thicker (rotating), unlike the conventional method (when the presser foot 6 is lifted up and then Furthermore, there is no need to lift the presser foot while passing it through the hoop, and the presser foot 6 automatically rotates downward when the presser foot 3 is lowered, which is extremely convenient. It also has the advantage of being able to use large attached devices.

In the embodiment shown in FIG. 1, the operating member 14 is in the shape of a lever, and its swinging lever rotates the presser foot upwards. The presser foot 6 can be raised one degree further than the rising height of the presser bar 3 (of course, a mechanism other than the one shown in the drawings may be used as long as the mechanism in which the action member 14 works) is used.

[Brief explanation of drawings]

FIG. 1 is a partially longitudinal front view showing an embodiment of the present invention, FIG. 2 is a partially longitudinal side view of the same, and FIG. 3 is a partially transverse plan view. 3... Presser bar, 4... Mounting frame, 6... Stone presser foot for sewing machine embroidery, 7... Horizontal shaft, 10... Spring, 14...
Acting member. Patent applicant Maruzen Sewing Machine Co., Ltd.

Claims (1)

[Scope of Claims] 1. A mounting frame detachably fixed to the lower end of the presser foot of the sewing machine (the rear end of the sewing machine's embroidery presser foot is attached so as to be swingable about a horizontal axis, and the presser foot is moved downwards). The upper part of the mounting frame is provided with a spring that biases the presser foot toward the upper part of the mounting frame, and when the presser bar is raised, the presser foot is rotated upward against the spring, and the presser bar is lowered, A presser foot device for sewing machine embroidery is equipped with an operating member that works in conjunction with the presser foot so as to rotate the presser foot downward from the spring counter. A means for freely attaching the presser foot and rotating the working member downward when the presser foot is raised; and a means for interlocking the working member and the presser foot so as to rotate the presser foot upward when the working member rotates downwardly. A presser foot device for sewing machine embroidery according to claim 1, which is provided with: 3. An upward protruding piece is provided at the rear end of the presser foot, a downward protruding piece is provided at the rear end of the working member; When the downward projecting piece is brought into contact with the front side of the upper end of the upward projecting piece and the presser foot bar is raised, the upper front end of the working member that also rises (this contact causes the working member to move against the mounting frame). The presser foot device for machine embroidery according to claim 2, further comprising a stopper for rotating downward.