JPH0436798Y2 - - Google Patents

Description

[Detailed description of the invention] Purpose of the invention (industrial field of application) This invention consists of a pair of clamping members that can be opened and closed for clamping two pieces of fabric that make up the rain cover of a suit, for example, and a pair of clamping members that can be opened and closed. A fabric holder for a sewing machine, which is equipped with a core member disposed between two workpiece cloths between the members, and is capable of sewing along the outer shape of the core member while one workpiece cloth is inflated relative to the other workpiece cloth. It is related to the device.

(Prior Art) In a conventional cloth holding device of this type, as shown in Japanese Utility Model Application No. 55-119074, for example, a pair of holding members for holding a workpiece cloth is provided with a material that matches the outer shape of the core member. Sewing grooves of a predetermined width are formed along each side, and the needle of the sewing machine is moved up and down through these grooves to sew the work cloth.

(Problem to be solved by the invention) However, in this conventional device, one of the two workpiece cloths is swollen more than the other by the core member at the inner side of the sewing groove between the two clamping members. At the same time, the work cloth is clamped and the free end of the work cloth is simultaneously clamped at a portion outside the sewing grooves of both clamping members, so that the inner and outer parts of the work cloth are fixedly clamped through the sewing grooves. If you try to enlarge the thickness of the core member to increase the amount of expansion of one workpiece cloth relative to the other workpiece cloth, in other words, if the workpiece cloth is likely to wrinkle or distort, If the wrinkles or distortions remain as they are, or if the wrinkles create a gap between the pair of clamping members outside the sewing groove, the free end of the workpiece cloth cannot be securely clamped, and the workpiece cloth may There is a risk that lifting may occur. Therefore, the amount of swelling of the work cloth is naturally limited, and a large amount of curling is ensured when both work cloths W1 and W2 are turned over so that the seams are on the inside after sewing, as shown in FIG. I had a problem that I couldn't do it.

In view of these problems, in the conventional device disclosed in the same publication, a clamping piece made of magnetic rubber or the like is fixed to the opposing surfaces of both clamping members at a portion outside the sewing grooves of both clamping members. do,
The structure is such that the free end of the work cloth can be held between the two holding pieces, but in this configuration, in addition to forming sewing grooves on both holding pieces, it is necessary to attach the holding pieces, which makes the structure difficult. The problem was that it was extremely complicated.

Structure of the Device (Means for Solving the Problems) This device was devised by paying attention to the above-mentioned problems. The member is arranged so as to be movable in the opening/closing direction of the clamping member, and sewing is performed along the sewing gap while the free end of the work cloth clamped by the clamping member is held down by the presser member. be.

(Function) Therefore, according to the cloth holding device of this invention, the free ends of the two pieces of work cloth held between the pair of holding members via the core member are movable independently of both holding members. Since the core member is pressed down by the pressing member, the thickness of the core member can be set to an arbitrary value, and a large amount of curling of the work cloth can be ensured.

(Example) An example of a cloth holding device for a sewing machine embodying this invention will be described below with reference to the drawings.

As shown in FIGS. 1 to 4, the lower clamping member 1 is formed by bending a metal plate into a stepped shape so that the base end side is higher, and the upper surface of the base end has a pair of frontal shapes approximately U-shaped.
A letter-shaped support plate 2 is fixed. The pair of support arms 3 are rotatably supported by pins 4 on each support plate 2 at their proximal ends, and at their tips, an upper clamp member 5 that corresponds to the lower clamp member 1 in an openable and closable manner is made of elastic rubber. It is fixed via the body 6 with screws 7 and nuts 8.

A pair of leaf springs 9 are connected to each support arm 3 at one end.
It is fixed to the lower surface of the support arm 3 and is engaged with the support plate 2 at the other end, providing frictional resistance to the support arm 3 to prevent forgetting. A pair of rotating arms 10 are rotatably supported by pins 11 at their base ends on each support plate 2 so as to be positioned above the support arms 3 at a predetermined distance, and an operation bar is provided between the distal ends thereof. 1
2 is constructed, and a supporting leg 13 having a substantially inverted U-shape in front is fixed to the lower surface of the intermediate portion. A pair of connecting rods 14 are rotatably attached to the support arm 3 and the support leg 13 by pins 15 and 16 at both ends, and a stop screw 17 that can be engaged with the upper surface of the support arm 3 is located in the middle thereof. are adjustably screwed together and positioned and fixed by a nut 18.

Then, as shown in FIG. 1, the operation bar 1
When the rotating arm 10 is rotated in the counterclockwise direction by 2, the upper clamp holding member 5 is rotated in the direction in which it is closed on the lower clamp holding member 1 via the connecting rod 14 and the support arm 3. When the pin 16 at one end of the rotating arm 14 is moved downward beyond the dead point on the line L-L connecting the pin 15 at the other end and the pin 11 at the proximal end of the rotating arm 10, the upper clamping member 5 is held closed. Conversely, if the rotating arm 10 is rotated clockwise, the upper clamp holding member 5
is rotated in the direction in which it is released from above the lower clamping member 1, and the pin 16 is moved upward beyond the dead point on the line L-L. , the upper clamping member 5 is held in the open position shown in FIG.

The regulating plate 19 is attached to the upper surface of the lower part of the step of the lower clamping member 1 so as to be movable and adjustable in the left-right direction in FIG. 1, and is clamped between both clamping members 1 and 5 as shown in FIGS. The positions of the edges of the two work cloths W1 and W2 are regulated by the engagement of the regulating plate 19 with the upright wall. A core member 20 having a substantially frame shape is attached to the regulation plate 19 via a pair of attachment bodies 21 at both ends of the base, and is mounted on the upper surface of the lower clamping member 1 at a predetermined position as shown in FIGS. 1 and 4. They are arranged at intervals of , and extend along the outer shape of the lower clamping member 1 .

and. As shown in FIG. 1, this core member 2
0 is held between the pair of clamping members 1 and 5 on both the processed cloths W.
1 and W2, and one work cloth W1 is held in an inflated state relative to the other work cloth W2. Further, in this embodiment, as shown in FIGS. 3 and 5, the corner portion 20a of the core member 20 is formed to be thicker than other portions, and the work cloth W1 corresponding to the corner portion 20a is It is designed to ensure a larger amount of inflation than other parts.

As shown in FIGS. 1 to 3, the upper clamping member 5 has a pair of inner and outer projecting walls 2 that protrude toward the lower clamping member 1 along the outer side of the lower surface of a flat plate portion 22 made of a metal plate.
3 and 24, and when the upper clamping member 5 is placed in the closed position on the lower clamping member 1, the pair of protruding walls 23 and 24 are located on the outside and inside of the core member 20, One work cloth W1 is replaced by the other work cloth W1.
2 Press it on top. The uneven portions 23a, 24a are formed at the tips of the respective projecting walls 23, 24 so as to extend toward the lower clamping member 1. In this embodiment, as is clear from FIGS. 1 and 3, both the projecting walls 23, 24 The uneven portions 23a and 24a are alternated on both sides of the core member 20.

The pair of support cylinders 25 are fixed to the upper surface of the base end of the lower clamping member 1 by screws 26, and a washer 27 is provided at the upper end thereof. The lifting plate 28 is the support tube 25
It is supported through the support cylinder 25 so as to be movable up and down, and is urged to move upward by the action of a coil spring 29 fitted into the support cylinder 25. The holding member 30, which is formed into a substantially frame shape from a bar material, has a pair of mounting bodies 31 at both ends of the base.
As shown in FIGS. 1 and 2, the gripping members 1 and 5 are mounted parallel to each other at a predetermined sewing interval 32 through which the needle 33 of the sewing machine passes. It extends to As shown in FIG. 1, when the elevating plate 28 is lowered against the action of the coil spring 29, the free ends of the workpiece cloths W1 and W2 held between the presser members 1 and 5 are It is held down by the member 30 so that it cannot float up.

In the cloth holding device of this embodiment, as shown in FIGS. 1 and 2, there are two
It is placed on the bed 34 of the sewing machine while holding the sheets of work cloth W1 and W2, and is detachably connected to the operating member 35 on the sewing machine side at the base end of the lower holding member 1 via a pair of clamps 36. be done.
Further, in this state, an operating member 37 on the sewing machine side is engaged with the upper surface of the elevating plate 28, and as the operating member 37 is moved up and down in accordance with pedal operation on the sewing machine side, the presser member 30 is pressed against the workpiece cloth. It is moved to a lower position where W1 and W2 are pressed and an upper position where the pressers are released. Then, according to a predetermined program built into the sewing machine, the cloth holding device is moved in any direction on the bed 34 via the operating member 35, and in cooperation with the needle 33 of the sewing machine and a thread loop catcher (not shown). , the holding member 30 and the clamping member 1,
5 along the sewing gap 32 between the work cloth W1,
A seam is formed at W2.

Next, the operation of the fabric holding device formed as described above will be explained.

Now, when attaching the work cloths W1 and W2 to this cloth holding device, the device is attached to the operating member 35 of the sewing machine.
As shown in FIG. 3, the upper clamp holding member 5 is moved to the open position by rotating the rotating arm 10 using the operating bar 12. In this state, the work cloth W2,
After inserting W1, the rotating arm 10
When the upper clamp holding member 5 is closed by the rotation operation, as shown in FIG. It is held in an inflated state with respect to the other work cloth W2. Therefore, if the cloth holding device is attached to the operating member 35 of the sewing machine as described above and sewing is performed in this state, one workpiece cloth W1 can be sewn to the other workpiece cloth W2 in an inflated state. I can do it.

By the way, in this embodiment, since the thickness of the corner portion 20a of the core member 20 is larger than the other portions as described above, the amount of expansion of the one work cloth W1 is greater than the thickness of the corner portion 20a of the core member 20. Part 2
Sewing is performed in a portion corresponding to 0a in a state where the portion is larger than other portions. Therefore, the sixth
As shown in the figure, when the work cloths W1 and W2 are turned over after sewing, even if the front work cloth W1 is pulled inward at the portion corresponding to the corner portion, the corner portion of the back work cloth W2 is There is no exposure to the outside of the front work cloth W1, and no dents are formed on the surface near the corners of the front work cloth W1.

Further, in the device of this embodiment, as described above, the protruding walls 23 and 24 of the upper clamp holding member 5 are provided with uneven portions 23a and 2.
4a, these protruding walls 23, 2
4, the work cloth W1 is intermittently pressed in an inflated state and held in a clamped state. Therefore, the work cloths W1 and W2 are pressed in a dispersed manner at intervals, and even in the vicinity of the corners of the core member 20, a certain amount of movement of the work cloths W1 and W2 is allowed. There is no possibility of local distortion or wrinkles occurring in W1, and even a patterned work cloth can be sewn without causing pattern deformation. In this embodiment, the uneven portions 23a and 24a of the pair of protruding walls 23 and 24 are formed alternately on the outside and inside of the core member 20, so that the inflated work cloth W
Local distortion of 1 can be more reliably prevented.

Furthermore, in this embodiment, since the presser member 30 is arranged movably up and down with a predetermined sewing gap 32 on the outside of the clamping members 1 and 5, the clamping member 30 can be held between the clamping members 1 and 5. processed cloth W1, W2
Since the free end of the workpiece cloth W1 is pressed only from above by the pressing member 30 independently of opening and closing of the upper clamping member 5, first, the lower clamping member 1 and the upper clamping member 5
By holding W2 and then pressing the free ends of the work cloths W1 and W2 with the presser member 30, the work cloths W1 and W2 are separated.
No unreasonable force is applied to the work cloths W1, W.
It is possible to prevent the occurrence of wrinkles and distortions as described in No. 2, and to prevent the work cloths W1 and W2 from lifting during sewing. Therefore, the thickness of the core member 20 can be freely set to ensure a large amount of curling of the work cloth.

It should be noted that this invention is not limited to the configuration of the above-mentioned embodiments, and it is also possible to embody the invention by changing the configuration of each part arbitrarily within a range that does not depart from the spirit of this invention.

Effects of the Invention As detailed above, in this invention, the free ends of two pieces of work cloth held between a pair of holding members via a core member are moved by a presser member that is movable independently of both holding members. Since the core member is pressed down, the thickness of the core member can be set to an arbitrary value, and a large amount of curling of the work cloth can be ensured, which is an excellent effect.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view of essential parts showing an embodiment of a cloth holding device for a sewing machine embodying this invention, Fig. 2 is a plan view of the same device, and Fig. 3 corresponds to Fig. 1. Main part longitudinal sectional view showing the state where the member is opened, No. 4
The figure is a cross-sectional view taken along line A-A in Figure 3, Figure 5 is a partial perspective view showing the corner part of the core member, and Figure 6 is a partial cross-sectional view showing the state where the work cloth is turned over after being sewn. . 1...Lower clamp holding member 1, 5...Upper clamp holding member, 20
... Core member, 30 ... Pressing member, 32 ... Sewing gap.

Claims (1)

[Scope of utility model registration request] 1. A pair of clamping members 1 and 5 that can be opened and closed for clamping two work cloths W1 and W2, and a core member 20 that is disposed between the work cloths W1 and W2 between the clamping members 1 and 5. In the cloth holding device of the sewing machine, the sewing machine is equipped with a cloth holding device for sewing along the outer shape of the core member 20 while one workpiece cloth W1 is inflated with respect to the other workpiece cloth W2. A presser member 30 is arranged so as to be movable in the opening/closing direction of the clamping members 1 and 5 with a predetermined sewing gap 32 therebetween.
The work cloth W held between the holding members 1 and 5 by
1. A cloth holding device for a sewing machine, characterized in that sewing is performed along the sewing gap 32 while holding down the free end of W2.