JPS5938228Y2 - sewing machine - Google Patents

Description

[Detailed description of the invention] Technical field This invention involves sandwiching the work cloth between a feed plate and a presser plate on a work cloth support surface, and moving the feed plate and presser plate relative to the needle. The present invention relates to a sewing machine that allows the user to perform required sewing operations.

Prior Art Conventionally, this type of sewing machine has been equipped with a sewing machine that uses a sewing machine between a bar-shaped outer presser plate and a feed plate on the workpiece cloth support surface in order to sew a sheet-like sewing piece such as a label or name onto the workpiece cloth. While the work cloth is being held between the work cloth and the work cloth partitioned by the outer press plate, a sheet-like sewing piece is inserted between the intermediate press plate, which is smaller than the sheet-like sewing piece, and has a similar shape, and the feed plate. Holding the sewing piece, in this state, move the outer press plate, the intermediate press plate and the feed plate relative to the needle,
There was one in which feed was applied to the processed cloth and sheet-like sewn pieces.

In addition, in this sewing machine, the intermediate presser plate is connected to a reversing device via a crankshaft having a substantially U-shaped crank part that revolves around one side of the needle drop point, and By reversing the crankshaft based on the action of the reversing device before the end of sewing, the stitches at the end of sewing can be made continuous with the stitches at the beginning.

However, in this conventional sewing machine, the reversing device has a complicated structure and has a large number of parts, which not only makes assembly troublesome but also increases manufacturing costs.

Purpose This invention was made in order to eliminate the above-mentioned defects.The purpose is to have an extremely simple structure, to be able to manufacture it at low cost, and to prevent the sheet-like sewing piece from lifting up from the fabric and to attach it to the edge of the fabric. To provide a new sewing machine that can reliably sew a sheet-like sewn piece along the line.

Examples Below, this invention will be applied to cycle sewing machines, especially labels,
An embodiment will be described based on a pattern comparison sewing machine used for sewing names and the like.

As shown in FIG. 1, an arm portion (not shown) of a sewing machine body 1 includes a needle bar 2 having a needle 2a at its lower end, and a presser foot 3 at its lower end.
A presser bar 4 having a presser bar 4 is supported so as to be vertically movable.

Further, as shown in FIGS. 2 and 3, this presser foot 3 is formed with an opening 3a through which the needle passes.

A needle plate 7 having a needle hole 6 and a cover plate 8 are respectively fixed to the bed portion 5 of the sewing machine body 1, and both 7 and 8 form a work cloth support surface 9.

A feed table 10 and a presser arm 11 are provided on this work cloth support surface 9, and both 10 and 11 are connected to each other at their base ends, and the feed table 10 is a well-known feed control mechanism including a feed cam. is connected to.

Based on the operation of this feed control mechanism, the feed table 1
0 and the presser arm 11 are adapted to be integrally moved in the front-rear direction or left-right direction in FIG.

As shown in FIGS. 1 and 2, a feed plate 12 is attached at its base end to one end of the feed base 10 by a pair of screws 13, and is disposed on the throat plate 7.

Further, an opening 14 is provided in the center of the feed plate 12, and a diamond pattern 15 for preventing slipping is formed on the upper surface of the opening 14.

A pair of operating levers 16 (only one shown) is supported on both sides of the presser arm 11 so as to be movable therebetween, and a retaining plate 18 is attached to a distal end 17 of the presser arm 11 with a plurality of screws 19.
It is fixed by.

Between this holding plate 18 and the tip end 17 of the presser arm 11, there is a pair of supports t? that are approximately L-shaped. Oa and 20b are arranged to be able to move up and down, respectively, and each operating lever 1 is connected at one end thereof.
6, respectively.

At the other end of each support member Oa, 20b, a pair of holding members 21a, 21b, which are approximately U-shaped, are attached to a screw 2 at a part thereof.
2a and 22b, respectively.

Moreover, the presser moth 3 is held by these presser members 21a and 21b.
An opening 24 having the same shape as the opening 14 of the feed plate 12 is formed in the center of the presser foot Ω3 when the end faces of both presser members 21a and 21b are aligned.

Based on the rotational operation of the operating lever 16, the pressing plate 23 is lowered via the support plates 20a and 20b to the lowered position shown in FIG.
The work cloth C can be held between the feed plate 12 and the presser foot #123 by the action of the urging means connected to the presser foot #123.

As shown in FIGS. 3 to 5, a pair of pressing members 21a.

A diamond pattern 25 for preventing slipping is formed on the lower surface of the holding member 21b over almost the entire surface, and a recess 26 having a flat bottom surface 26a is formed on the lower surface of the front side of one of the holding members 21b. A pressing member 21b is located approximately in the center of the
A notch 6b extending in the width direction is formed.

The lower surface of the presser plate 23 is made of a transparent synthetic resin material, such as polycarbonate resin, and has approximately the same shape as the presser plate 23, and has approximately the same thickness as the sheet-shaped sewing piece W for labels, names, etc. A thick presser sheet 29 is provided, and a positioning hole 30 having the same shape as the sheet-like sewing piece W is formed in the center of the presser sheet 29.

Further, as shown in FIGS. 4 to 6, the one presser member 2
The presser sheet 29 is placed at a position facing the recess 26 of 1b.
A mounting plate 31 formed by bending an elastic plate is provided on one side edge of the plate, and the presser sheet 29 is removably attached to the presser plate 23 via the mounting plate 31.

A pair of clamping parts 32 are formed above the mounting plate 31 and have an approximately U-shape and an engaging protrusion 32a at the tip. A portion 33 is formed, and both portions 32 and 33 are flat portions 34.
are connected to each other.

Then, in a state where the leg portions 33 are fitted into the positioning grooves 35 formed on the lower surface of the presser sheet 29 and the mounting plate 31 is positioned, the mounting plate 31 is fixed by the rivet 36.
is fixed to the presser sheet 29, one head of the rivet 36 is housed in the positioning bolt 5, and the pair of clamping parts 32 are fixed to one presser member 2 based on their elasticity.
1b, and the base ends of both engaging protrusions 32a are pressed against the presser member 21.
A presser sheet 29 is attached to the presser plate 23 in a state where it is engaged with the inner ridgeline of b.

When this presser sheet 29 is attached, the flat part 34 of the mounting plate 31 is accommodated in the recess 26 of the other presser member 21b, and the other head of the rivet 36 is accommodated in the notch groove 26b. , the positioning hole 30 of the presser sheet 29 is located approximately in the center of the opening 24 of the presser foot 3, and the presser sheet 2
9 is positioned on the work cloth C.

Also, when attaching this presser sheet 29 to the presser moth 3, the mounting plate 31 on the presser sheet 29 is attached to one presser member 21.
A presser sheet 29 is arranged on the lower surface of the presser plate n so as to face the recess 26 of b, and the pair of clamping portions 32 are pushed apart against the elasticity of the sheet itself, so that both engaging protrusions 32a are attached to one of the presser members. Upper surface II of 21b - contact with the presser sheet 2
By moving the presser sheet 9 rearward, the attachment work can be easily performed. On the other hand, when removing the presser sheet 29 from the presser plate 23, the engaging protrusions 32a are pressed against the elasticity of the presser sheet 29. separated from one presser member 21b,
By moving the presser seed 29 forward together with the mounting plate 31 in this state, the removal operation can be easily performed.

2. On the work cloth C, a sheet-shaped sewing piece W such as a label or name is placed in the positioning hole 30 of the presser sheet 29 and positioned at a predetermined sewing position on the work cloth C.

In this state, the upper surface of the sheet-shaped sewing piece W and the upper surface of the presser sheet 29 form substantially the same plane.

Next, the operation of the sewing machine configured as described above will be explained.

Now, when sewing the sheet-shaped sewing piece W onto the processed cloth C,
Before starting sewing, after raising the needle 2a and presser foot 3 to the raised position shown in FIG.
The support plate 20a is rotated based on the rotation operation of the support plate 20a.

The presser plate 23 and the presser sheet 29 are raised from the lowered position shown in FIG. 1 via the presser plate 20b.

Then, by placing the work cloth C on the feed plate 12 and moving the work cloth C appropriately, the sewing position of the sheet-like sewing piece W on the work cloth C and the positioning hole 30 of the presser sheet 29 are determined. When the actuating lever 16 is rotated again in this state to lower the presser plate 23, the feeder plate 12 and the presser plate 23 are moved together based on the action of an appropriate biasing means.
The work cloth C can be held between the feed plate 12 and the diamond pattern 15 of the feed plate 12 to prevent the work cloth C from slipping.

Next, when the sheet-like sewing piece W is accommodated in the positioning hole 30 of the presser sheet 29, the sheet-like sewing piece W is positioned at a predetermined sewing position on the work cloth C.

Then, when the presser foot 3 is lowered in this state, the second
As shown in the figure, the presser foot 3 is disposed astride the presser sheet 29 and the sheet-like sewing piece W, and the needle passage opening 3a is located at a predetermined sewing position of the sheet-like sewing piece W. The presser foot 3 presses both 29. Pressure pressure toward the feed plate 12 is applied to W.

When the sewing machine starts operating in this state and the feed control mechanism is activated, the feed plate 12 and the presser plate 23 follow the outer shape of the sheet-like sewing piece W, and the needle 2a is placed on the work cloth support surface 9.
The needle 2a is moved back and forth and left and right relative to the feed control mechanism, and the needle 2a is also moved up and down in synchronization with the feed control mechanism.
a and a thread loop catcher (not shown) in the bed section 5, stitches are formed along the side edges of the sheet-like sewing piece W in the order indicated by the arrows in FIG. When the stitches at the end of cycle sewing are connected to the stitches at the start of sewing, the sewing machine is automatically stopped, and the sewing work of the sheet-like sewn piece W is completed.

During this sewing work, the presser foot 3 always applies presser pressure while straddling the presser sheet 29 and the sheet-like sewing piece W, so that the sheet-like sewing piece W is attached to the workpiece cloth. In addition, the sheet-like sewing piece W is positioned within the positioning hole 30 of the presser sheet 29, and no relative displacement occurs between the workpiece cloth C and the sheet-like sewing piece W. Therefore, the sheet-like sewing piece W can be reliably sewn at a predetermined sewing position.

Note that this invention is not limited to the above-described embodiment. For example, as shown in FIG. 7, a positioning hole 30 larger than the sheet-like sewing piece W is formed in the presser sheet 29, a pair of inner edges 30a that intersect with each other,
30b, the corresponding outer edges Wa, Wb of the sheet-like sewing piece W
are in contact with the positioning hole 30, and various sheet-like sewing pieces W having a similar shape and smaller than the positioning hole 30 are attached to the work cloth C.
In addition, as shown in FIG. It is also possible to form a positioning hole 30 having the same shape as W and position the sheet-like sewn piece W therein.

Furthermore, in this embodiment, the movement of the work cloth C in the front, back, left and right directions is controlled by a feed control mechanism including a feed cam, but instead of the feed control mechanism, the movement of the work cloth C is controlled by pulses. It is also possible to control by a feed control mechanism including a motor.

Effects As detailed above, this invention forms an opening in the center of the presser plate, and a label to be sewn onto the processed fabric is placed in the center of the presser sheet, which is placed on the underside of the presser plate to cover the opening. , form a positioning hole for a sheet-shaped sewing piece such as a name, fix a mounting plate to the presser sheet in order to removably attach the presser sheet to the presser plate, and connect the presser sheet and the sheet-shaped sewing piece. In order to press both hands toward the feed plate during sewing while straddling the sewing machine, a presser foot with an opening for passing the needle is attached to the sewing machine body, which makes the structure extremely simple and can be manufactured at low cost. Not, but
This provides an excellent effect in that the sheet-like sewing piece can be reliably sewn along the edge of the work cloth without the sheet-like sewing piece lifting up from the work cloth.

Furthermore, since the mounting plate fixed to the presser sheet is bent into a substantially U-shape so as to embrace the presser plate from the side, the presser sheet can be easily attached to and removed from the presser plate of the sewing machine.

Therefore, it is very advantageous when a plurality of presser sheets having positioning holes of various shapes are used interchangeably as necessary to match the name to be sewn.

[Brief explanation of the drawing]

Figure 1 is a side view showing the main parts of a pattern apprentice sewing machine that embodies this idea, Figure 2 is a plan view of the same, Figure 3 is a partial enlarged sectional view taken along line 3-3 in Figure 2, and Figure 4 The figure is an enlarged sectional view taken along the line 4-4 in Fig. 2, Fig. 5 is an enlarged front view showing the mounting structure of the mounting plate, Fig. 6 is an exploded perspective view of the presser sheet and the mounting plate, and Fig. 7.8 is an exploded perspective view of the holding sheet and the mounting plate. FIG. 7 is a plan view showing separate presser sheets. Needle: 2a, Presser foot: 3, Needle passage opening: 3a, Work cloth support surface: 9,
Feeding plate...12, Holding plate...23, Opening...24, Holding sheet...29, Positioning hole...30, Installation Board...31.
Legs...33, processed cloth...C, sheet-shaped sewing pieces...W.

Claims (1)

[Claims for Utility Model Registration] ■ The feed plate 12 and the presser plate 23 on the work cloth support surface 9
In this sewing machine, the work cloth C is sandwiched between the work cloth C and the feed plate 12 and the presser foot 3 are moved relative to the needle 2a to perform the required sewing. a presser sheet 29 formed with a positioning hole 30 for a sheet-like sewing piece W such as a label, name, etc., and arranged on the lower surface of the presser foot 3 so as to cover the central opening 24 formed in the presser foot 3; In order to removably attach the presser sheet 29 to the presser foot orange 3, the presser foot sheet 29 is attached to the presser foot orange 3 in an almost U-shaped manner so as to embrace the presser foot 3 from the side.
The mounting plate 31 is bent into a letter shape and has a lower leg portion 33 fixed to the presser sheet 29, and an opening 3a for needle passage, and is connected to the presser sheet 29 and the sheet-like sewing piece W. 29. While sewing while straddling both. and a presser foot 3 attached to the sewing machine body for pressing W toward the feed plate 12, and causing the sheet-like sewing piece W to rise along the edge of the sheet-like sewing piece W. A sewing machine characterized by being able to perform sewing without any hassle. 2 The thickness of the presser sheet 29 is the same as the sheet-like sewing piece W.
The sewing machine according to claim 1, wherein the sewing machine has a thickness substantially equal to the thickness of the sewing machine. 3. The sewing machine according to claim 1 or 2, wherein the presser sheet 29 is made of a synthetic resin material. 4. The sewing machine according to claim 1, wherein the mounting plate 31 is made of an elastic plate.