JP2002191881A - Sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sewing machine by which positioning is surely performed and also a nonuniform edge can be sewed. SOLUTION: A cloth feeding base for feeding in the X and Y direction on a sewing machine table is provided with a positioning device and a cloth pressor which are respectively vertically movable and, then, an object to be sewed without a hole is positioned on a lower board which is fixed on the cloth feeding base. The positioning guide of the positioning device is set and put through an object to be sewed with a hole, the positioning device is lowered and the object to be sewed without a hole is pressurized and held. Then, the object to be sewed with a hole is positioned onto the outer peripheral surface of the positioning guide, the pressure foot is lowered and the whole objects to be sewed are pressurized from the upper surface of the object to be sewed with the hole and held so that positioning is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing apparatus for sewing a plurality of fabrics having at least one hole along a substantially outer periphery of the hole.

[0002]

2. Description of the Related Art A sewing apparatus according to the present invention is, for example, shown in FIG.
A plurality of fabrics including a fabric having at least one or more holes H, such as a fabric A and a fabric B, as shown in FIG.
As shown in FIGS. 7 (a) and 7 (b), it is used when sewing is performed substantially along the outer periphery of the hole H.

Conventionally, when sewing a plurality of cloths as described above, the cloths are empirically superimposed on the needle drop position by visual inspection, and then the cloth presser is lowered to clamp the cloths, thereby performing sewing.

[0004] However, since the visual alignment relies on sensual experience, the edge is not stable, and the finished product varies depending on the skill of the operator. Here, the edge is a sewing margin from the cloth edge to the seam, and is indicated by K in the figure in the present case, and indicates the distance from the edge of the hole H provided in the cloth to the seam S.

Therefore, a method having a positioning guide 1a for facilitating alignment has been used in order to improve the finish of the edge. For example, in the method shown in FIG. 8 (a), a positioning guide 1a which vertically moves with respect to the sewing machine table 20 by driving means (not shown) and protrudes above the sewing machine table 20 at an ascending position is provided. The cloth A is fitted and aligned, and the cloth A and the cloth B are positioned so as to cover the cloth B from above and sewing is performed. However, during execution of the sewing, the positioning guide 1a is retracted to the lowered position.

[0006] In the method of FIG. 8 (b), respectively opening C ₁ a, the presser foot C cassette type formed by hinged an upper plate C ₁ and the lower plate C ₂ having a C ₂ a The positioning guide 1a is formed on an auxiliary table T for positioning, and an opening C ₂ a provided in the lower plate C ₂ at the time of positioning.
So that the positioning guide 1a is inserted through the
The cassette holder C is placed on the upper side. The positioning guide 1a
After aligning the fabric B so as to cover from the upper aligning and by fitting the fabric A, the fabric A lowers the upper plate C _1,
After holding B, the cassette type presser foot C is moved to the needle drop position and attached to a sewing machine (not shown).

[0007]

However, in the method shown in FIG. 8 (a), it is necessary to provide a drive means for moving the positioning guide 1a up and down below the sewing machine table 20, and an unillustrated drive means is provided below the needle drop position. The positioning guide 1a could not be provided at the needle drop position due to the presence of the sewing machine hook and the interference between the two. Therefore, it is necessary to provide the positioning guide 1a at a position separated from the needle drop position, and there is a problem that the cycle time becomes longer and the cloths A and B positioned at the time of conveyance to the needle drop position are shifted. . Further, when the fabric A is thin because the fabric B is configured to be joined from above,
The amount of protrusion of the positioning guide 1a on the sewing machine table 20 has been limited.

Further, in the method of FIG. 8 (b), for the clamping configuration by the upper and lower plates C _1, C _2, which is hinged, one or excessive relative to the size of the cassette presser foot C too In the case of a bulky cloth such as a thick cloth, there is a problem that the cloth is shifted before the cassette type presser foot C is attached to the sewing machine. further,
Designed to reduce the fit from above similarly to the fabric B and aspects of FIG 8 (a), in a case the fabric A thin got the amount of projection of the lower plate C ₂ on the positioning guide 1a is restricted I was

In view of the above problems, the present invention provides a sewing apparatus that can easily and reliably position a fabric, stabilizes the edge, and can be used for sewing by uneven edge or staggered sewing. The purpose is to:

[0010]

In order to achieve the above-mentioned object, a sewing apparatus according to the first aspect of the present invention presses a sewn material at a tip thereof.
A cloth feed base to which a holding member to be held can be attached and which can be freely moved within a movable area on the sewing machine table surface; and a lower plate fixed to the cloth feed base and having an opening larger than a sewing area. Then, in a sewing apparatus that holds the sewn product pressed by the holding member between the lower plate and the sewing machine while feeding the sewn product on the sewing machine table surface by the cloth feeder, A positioning device having a positioning guide for positioning with an outer peripheral surface having a shape substantially conforming to the shape, and a cloth presser for pressing and holding the vicinity of the positioning guide are provided as the pressing members so as to be vertically movable. And

In order to achieve the above object, a sewing apparatus according to a second aspect of the present invention, in addition to the configuration according to the first aspect, further comprises: The present invention is characterized in that a guide assisting portion is provided which projects below the sewn product so that the sewn product does not fall.

According to a third aspect of the present invention, in order to achieve the above object, in addition to the configuration of the first aspect, when a sewing product having the hole on the outer periphery of the positioning guide is set. A cloth presser is provided so as to cover a part or the whole of the sewing product near the positioning guide.

According to a fourth aspect of the present invention, there is provided a sewing apparatus according to the fourth aspect, wherein the width of the vertical movement of the positioning device and the presser foot is increased. Are variable.

According to a fifth aspect of the present invention, there is provided a sewing apparatus having at least one hole having at least one hole in addition to the structure according to the first aspect. When suturing a plurality of sewn products including the sewn product, after setting the sewn product having the hole in the positioning guide, and before the cloth presser presses and holds the plurality of sewn products, the positioning device The sewing machine having no hole is pressed and held by the positioning guide by lowering the sewing machine.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention.
Is a sewing machine main body, and 20 is a sewing machine table of the sewing machine. Cloth feed table 10 provided on sewing machine table 20
Are provided with devices described below. The cloth feed table 10 is supported by an XY feed mechanism 30 provided below the sewing machine table 20, as shown in FIG. However, the sewing machine table 20 is not shown in FIG.

At the end of the cloth feed table 10, a sewing product is pressed and
A positioning device 1 as a holding member to be held and a cloth presser 2 are attached so as to move up and down independently of each other. Both are vertically moved by a driving mechanism constituted by cylinders 11 and 11 and lever members 12 and 12 provided on the left and right sides of the cloth feed table 10, respectively. A lower plate 3 provided with an opening 3a is attached to the base of the cloth feed base 10 so as not to interfere with the needle drop in the sewing area. It extends to the sewing work position to hold the sewing product. Accordingly, the respective devices are freely fed together within the movable area on the surface of the sewing machine table 20 by driving the XY feed mechanism 30.

The positioning device 1 is, as shown in FIG.
Reversing device 1c, reversing crank 1b, positioning guide 1a
And a guide auxiliary member 1d. Sewing goods A,
B and a positioning guide 1a as shown in FIG.
When performing sewing along the outline of the above, the sewing product B is clamped by the positioning guide 1a and the crank support shaft 1e is rotated by the reversing device 1c when sewing over the reversing crank 1b supporting the positioning guide 1a. By reversing the reversing crank 1b, a closed circumference can be sewn along the outer shape without interfering with the needle.
The guide assisting member 1d is formed to protrude from the lower side or lower end of the side surface of the positioning guide 1a in the form of a flange over the entire circumference or a part thereof, and the amount of protrusion is smaller than the edge.

As shown in FIG. 4, the cloth presser 2 has an opening 2a substantially similar in shape to the outer peripheral surface of the positioning guide 1a and slightly larger than the outer peripheral surface of the positioning guide 1a. Fabric can be suppressed widely.

Hereinafter, the sewing operation by the sewing machine having the above configuration will be described. For example, in the process of sewing a supporter or the like used for protecting a knee or the like, a fabric A having a hole H as shown in FIG. 6A made of an elastic material such as urethane and a fabric A shown in FIG. Cloth B as shown in)
There is a step of performing sewing as shown in FIG.

First, the hole H of the cloth A is aligned with the positioning guide 1a.
Through from below. Here, as the positioning guide 1a, a guide having a size substantially matching the hole H of the cloth A in advance is used. The stretchable cloth A is set on the outer periphery of the positioning guide 1a and on the upper surface of the guide auxiliary member 1d so as to ride over the outer periphery of the guide auxiliary member 1d from below the positioning guide 1a.

Next, the cloth B is set on the upper surface of the lower plate 3, and the positioning device 1 and the cloth presser 2 are individually lowered from above. The positioning device 1 presses and holds the fabric B with the lower surface of the positioning guide 1a, and the fabric presser 2 does not interfere with the reversing crank 1b of the positioning device 1 positioned above and the fabric A is set on the lower positioning guide 1a. Stop descending at an appropriate distance. Positioning guide 1a
The cloth A set on the outer periphery of the cloth A is rotated below the cloth presser 2 without being pressed and held by the cloth presser 2 provided above a part or the whole of the cloth A near the positioning guide 1a. It is in a possible state, and is moved in the rotation direction including fine adjustment of the position in the X-Y direction in the figure to perform positioning with the fabric B.

When the positioning of the sewing materials A and B is completed, the cloth presser 2 is further lowered to press and hold the cloths A and B positioned by the lower surface thereof. The two held fabrics are aligned so that they do not come off, and then sewing is started. According to the shape to be sewn, each device and the sewing products A and B are
-Y is sent. During that time, the sewing needle moves up and down at a predetermined needle drop position, and sewing is performed. Further, when the XY feed reaches a predetermined position, the reversing crank 1b is reversed so that the closed stitch can be sewn. After the sewing is completed, the work clamp 2 and the positioning device 1 are raised to take out the sewing product.

Here, the lowering of the presser foot 2 is
The two cylinders 11 and the cylinder (not shown) are used for lowering in two stages. However, in order to avoid interference with the reversing crank 1b of the positioning device 1 which is moving downward. Operation, so reverse crank 1
If it does not interfere with the setting and positioning of the sewn product without interfering with b, it may be lowered in one step. Further, detailed description of operations such as up and down movement of the work clamp 2 and the positioning guide 1 has not been described, but the method may be a pedal operation, a key operation, or a manual operation (not shown). It can be used.

FIG. 5 shows another sewing mode that requires uneven edges K ₁ and K ₂ . The hole H formed in the cloth is elliptical, and when sewing around it in a circular shape, the distance from the hole H becomes uneven depending on the sewing position. As shown in the figure,
Since the hole H formed in the cloth is elliptical, the positioning guide 1a
The opening 2 of the presser foot 2 is provided in a circular shape in accordance with the shape to be sewn.

Therefore, the fabric having the hole H formed therein is surely positioned by the positioning guide, and the vicinity of the seam S is pressed by the cloth presser, and the opening of the cloth presser 2 from the outermost surface of the hole H and the positioning guide 1a. Part 2a
K _2, sewing surely take a non-uniform edge K _1> K ₂ as at the opening 2a of the presser foot 2 is close to the K _1, most hole H and the positioning guide 1a outer peripheral surface in place which is away be able to.

In the sewing for forming such a closed seam S, sewing by staggered sewing or the like is sometimes performed. Sewing with other seams can also be performed. Here, the present invention relates to a closed seam S
However, the present invention is not limited to only the sewing for forming

The present invention is not limited to the above-described embodiment, and its configuration can be variously changed without departing from the technical scope thereof.

For example, even when the thickness of the cloth is excessively changed, the width of the vertical movement can be made variable by shifting the cylinder connecting position of the L-shaped lever member of the vertical movement drive mechanism. The width can be adjusted according to the thickness of the cloth. Further, the means for moving up and down and the means for changing the width of up and down movement are not limited to the above-described embodiment using the cylinder.

Although the description has been given of the case where the guide assisting portion is provided so as to protrude below the positioning guide, the guide assisting portion may be provided integrally with the positioning guide, or may be separately attached as a guide assisting member. Furthermore, although the description has been started only with the protruding shape, by providing a groove on the outer periphery below the positioning guide, a sewing product (fabric A) enters the groove, and the lower end of the positioning guide below the groove serves as a guide assisting portion. You may make it.

When positioning the non-stretchable material, the cloth A is hooked on the upper part of the positioning guide when the cloth A is set on the positioning guide before descending, and the opening of the cloth A is formed on the outer periphery of the guide after the positioning guide is lowered. What is necessary is just to make it align and to position it. Alternatively, the guide assisting member may be made of an elastic body, so that even a non-stretchable material may be positioned using a positioning guide having a guide assisting portion.

Although the positioning guide has been described in the form of a disk, the thickness, shape, etc., such as a cylindrical shape and a prismatic shape, can be appropriately changed according to the sewing pattern and the shape and properties of the sewing product.

[0033]

According to the first aspect of the present invention, since the inner edge of the hole provided in the sewing product and the shape of the outer periphery of the positioning guide substantially match, accurate positioning can be performed before the start of sewing. And the edge is stabilized. In addition, since the positioning device, the presser foot, and the lower plate are provided on the cloth feed table in the vicinity of the sewing area, the sewing object and the sewing object are positioned at a position separated from the sewing area, and are conveyed to the sewing area, and are positioned. There is no need to retract the positioning guide later, and the devices are sent together according to the sewing pattern in the sewing area, so that the cycle time required for sewing can be reduced.

According to the second aspect of the present invention, since the guide assisting portion projects below the abutting portion between the positioning guide and the sewing product set on the positioning guide, the sewing product set on the positioning guide can be removed. It is difficult to fall from the positioning guide.

According to the third aspect of the present invention, since the cloth presser is provided above the vicinity of the positioning guide, the sewn product which is fitted on the outer peripheral surface of the positioning guide and abuts and is set on the upper portion of the positioning guide. Reduce riding.

According to the fourth aspect of the present invention, the width of the vertical movement of the positioning device and the presser foot is made variable,
For example, even if the thickness of the sewn product is increased, the ascending positions of both devices are changed according to the thickness of the sewn product so that the sewn product can be set before the start of sewing. The upper position and the lower position of each of the positioning device and the presser foot can be determined based on changes in the thickness and properties.

According to the fifth aspect of the present invention, the positioning device descends prior to the presser foot, so that when positioning the sewing product, the positioning of the sewing product is performed in advance and the pressing and pressing operation is performed.
The sewing object can be held, and the sewing object can be positioned without shifting the sewing object. Further, when the positioning device is lowered to press and hold the workpiece, the cloth presser is in the air, and the unclamped workpiece below it can be easily positioned in the rotation direction.

[Brief description of the drawings]

FIG. 1 is a perspective view of a sewing machine using one embodiment of the present invention.

FIG. 2 is a view illustrating a cloth feeder using one embodiment of the present invention and its X-
It is a perspective view which shows a Y feed mechanism.

FIG. 3 is an explanatory view showing an embodiment of a positioning device.

FIG. 4 is an explanatory view showing one embodiment of a work clamp;

FIG. 5 is an enlarged schematic view of a main part showing another embodiment.

6A is an explanatory diagram of a fabric A provided with holes, and FIG. 6B is an explanatory diagram of a fabric B.

FIG. 7A is a view showing a sewing example including a cloth A provided with holes. is a diagram showing an example of sewing a fabric between A _1, A ₂ provided with (b) a hole

FIG. 8A shows a conventional example of a positioning device. FIG. 8B shows a conventional example of a positioning device.

[Explanation of symbols]

1 Positioning device 1a Positioning guide
1b Reversing crank 1c Reversing device 1d Guide auxiliary member
1e, 1f Crank support shaft 2 Work clamp 2a Work clamp opening
3 Lower plate 3a Lower plate opening 10 Cloth feeder
11 Cylinder 12 Lever member 20 Sewing machine table
30 XY feed mechanism 100 Sewing machine body A Fabric A
B Fabric B C Cassette type fabric foot H hole
S Stitch line K Edge width T Auxiliary table

Claims (5)

[Claims] 1. A cloth feed table to which a holding member for pressing and holding a sewing product can be attached at the tip and which can be freely moved within a movable area on a sewing machine table surface. A lower plate having a large opening, and holding the sewn material pressed by the pressing member between the lower plate and the sewing while performing sewing on the sewing machine table surface by the cloth feeder. A positioning device having a positioning guide for positioning a sewing product having a hole with an outer peripheral surface having a shape substantially matching the shape of the hole; and a cloth presser for pressing and holding the vicinity of the positioning guide. A sewing device characterized in that it is provided as a member so as to be vertically movable. 2. A guide assisting portion is provided at a lower side or a lower end of a peripheral side surface of the positioning guide so as to protrude below the sewn product so as to prevent the sewn product having the hole set in the positioning guide from dropping. The sewing apparatus according to claim 1, wherein 3. The sewing machine according to claim 1, further comprising a cloth presser which covers a part or the whole of the sewing product near the positioning guide when the sewing product having the hole is set on the outer periphery of the positioning guide. The sewing apparatus according to claim 1, wherein 4. The vertical movement width of the positioning device and the work clamp is variable.
The sewing device according to any one of the above. 5. When sewing a plurality of sewn articles including at least one sewn article having the hole, the sewn article having the hole is set on the positioning guide, and the cloth presser is sewn. The sewing product having no hole is pressed and held by the positioning guide by lowering the positioning device before pressing and holding the sewn product according to any one of claims 1 to 4. Sewing equipment.