JP2753973B2 - Sewing frame - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewn object stretch frame for sewing a sewn object such as a duvet fabric or a cotton futon, a curtain fabric, a table cloth or the like using a sewing apparatus. The present invention relates to a stretch frame for a sewn article which can be easily stretched in the frame without forming wrinkles in the fabric.

[0002]

2. Description of the Related Art In order to facilitate sewing by a sewing machine such as a duvet or a cotton futon or a curtain fabric,
Conventionally, the stretch frame to be sewn to stretch the fabric into the frame has conventionally been fitted with a plurality of clips attached to each side of the frame to fix the edges of the fabric, Some hooks were hooked and fastened.
If you do not attach the futon fabric in the frame while it is tightly tightened, wrinkles will remain and the seams will not be straight straight lines, or the surface will have an unnatural finish with irregularities The worker hooked the edge of the dough and attached it to the frame with a very strong force (about 10 kgf). When attaching this fabric, in the case of the conventional clip type, since the worker strongly pulls the edge of the fabric with both hands, both hands must be closed and the clip must be operated using a chin etc., which was difficult to operate . Also, when re-tensioning the dough once to completely eliminate wrinkles, it is necessary to release the clip and re-tension the dough with a stronger force. Multiple people were needed. In the case of the hook needle type used for sewing materials that require not only the outer material but also the lining like the duvet fabric, the worker hooks the hook with the hands while strongly pulling the edge of the fabric with both hands,
The outer fabric and lining were fixed together. Since a hole was always formed at the end of the cloth hooked on the hook, it could not be used for a sewn product with a design and shape that appeared on the surface up to the end of the cloth. Normally, the dough using the same had a separate operation of cutting off and removing the perforated end. However, the position at which the cloth is hooked on the hook is shifted and the position of the hole is changed, and the dimensions of the whole cloth, including the size at which the cloth is cut off, are deviated, so that defective products are easily formed and the yield is poor.
In any of the above-described conventional clip-type and hook-and-needle types, the operator takes a lot of time and effort to perform the operation of simultaneously holding the dough in the frame while strongly pulling the dough and holding it in a wrinkle-free state. There was a big problem.

[0003]

The problem to be solved by the present invention is to solve the above-mentioned problems, and to enable the operator to separately perform the operation of holding the dough on the frame and the operation of strongly stretching the dough. It can easily and quickly pull the dough strongly and stretch it in a wrinkled state, reduce labor and improve work efficiency and work alone, and can stretch the fabric without making holes etc., An object of the present invention is to provide a tension frame.

[0004] 1) A plurality of clips for a fabric to be sewn such as a futon fabric or a curtain fabric are attached to the inside of each side of a rectangular frame, and the edges of each side of the fabric are sandwiched between the clips. In a stretchable frame for sewing, the clip is attached to each side of the frame via a support arm, and each clip of at least one of two sides facing the frame is respectively supported. to face along the arm
A holding frame for holding the clip at a predetermined position, the holding arm being capable of moving in the direction of approaching and separating toward the side of the object, and 2) supporting all the clips of the frame. 3) The sewing object tension frame according to 1) above, further comprising a holding unit that is movable along the frame and holds the clip at a predetermined position. 4) A rack to be sewn according to the above 1) or 2), which is attached to the clip, which is movable along the support arm, and a rack is attached along the support arm, and the rack is attached to the support arm. A holding means having a structure in which a locking pawl is pivotally mounted in the middle and swingably mounted, and a spring for urging the pawl into engagement with the rack is provided, and the pawl is engaged with the rack to hold the clip. 5) The clip to be sewable along the support arm is biased toward the center of the frame by a spring. 6) The sewing machine according to any one of 1), 2) and 5) above, wherein a hook for hooking the sewing object on the support arm so as to fasten the sewing object is positioned next to the clip. The tension frame for sewing 7) The tension frame for sewing according to the above 3) or 4), wherein a hook for hooking the object to be sewn on the support arm is attached so that a needle point is located beside a clip. The tension frame for sewing according to the item 6), wherein a flexible thin cover for covering the tip of the hook is attached to the support arm. 9) A flexible thin cover for covering the tip of the hook. Is attached to the support arm.

[0005] The clip used in the present invention may be of any structure as long as it is a gripper having a sufficient holding force capable of fixing the tightly stretched cloth so that it cannot be wrinkled.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION In a tension frame for a sewn object according to the present invention, first, of the two pairs of opposite sides of the frame, each of the clips on each side on which the clip is movable is attached to the support arm toward the center of the frame. The clip along the center of the rectangular frame. Next, the four sides of the sewn object are held by sandwiching the clips on each side of the frame, and the entire fabric is stretched into the frame. Thereafter, the fabric with the movable clips sandwiched therebetween is strongly pulled toward the outside of the frame and moved, and the fabric is stretched to remove wrinkles. These clips can be moved to the outside of the frame along the support arm and held in a predetermined position by the holding means, so that the state in which the clips are tightly stretched can be reliably maintained. Stretching is completed when the clip is strongly pulled and moved to a completely wrinkle-free state in both the vertical and horizontal directions of the fabric.

In a configuration in which all clips of the frame are movable along the support arm and can be held at a predetermined position, after the sewn object is stretched in the frame, the fabric and the frame sandwiching each clip on each side of the frame are placed. Move it by pulling it strongly toward the outside,
Apply dough and remove wrinkles. At this time, the moving amount of each clip on the same side of the frame is made substantially equal to prevent the cloth from being distorted. The work is complete when the fabric is completely removed. By adjusting the amount of clip movement for each side of the frame, the center of the sewn objects having different sizes can be matched with the center of the frame.

In the configuration in which the position of the support arm can be adjusted along each side of the frame, first, each support arm on each side of the frame is moved along the frame in accordance with a predetermined seam position of the workpiece. Adjust the position so that the seam is on the centerline of the clip, and then secure the support arm to the frame. After that, the sewn object is stretched in the frame, and the clip is moved to completely remove the wrinkles. By adjusting the position of the support arm, the sewing object can be stretched to the optimal position in the frame in accordance with the difference in dimensions, and the seam located on the center line of the clip is particularly strongly pulled to ensure Sewing can be performed without wrinkles.

In a configuration in which the rack attached to the clip and the pawl attached to the support arm engage with each other to hold the clip, the work to be sewn is stretched in the frame, and the clip together with the cloth is directed to the outside of the frame. When pulled hard, the rack attached to the clip moves with the clip along the support arm, pushing up the claws on the support arm that engage the grooves in the rack with the teeth of the rack. When the clip is moved in the opposite direction, i.e., toward the inside of the frame, the rack grooves and pawls engage firmly to stop the movement of the rack and clip, so that the clip is held in place and the fabric is strongly The tensioned state can be maintained as it is. Since the clip is automatically held and the operation of the operator is not required, the pulling operation becomes easy. When the clip is strongly pulled and moved from the fabric until it is completely wrinkled, the rack and the pawl work are held at that position to complete the work of stretching the frame.

In the configuration in which the clip movable along the support arm is urged toward the center of the frame, when the holding means is released and the clip held at the predetermined position is set in the free state,
The clip is moved toward the center of the frame by the bias of the spring, and is brought closer to the center of the frame. If the holding means is released before the workpiece is stretched into the frame, the operation of moving the clip toward the center of the frame by the operator can be omitted.

The structure in which the hook is attached to the support arm for hooking and fastening the work to be sewn is mainly used when two fabrics are simultaneously sewn, such as the outer fabric and the lining of a duvet fabric. In this configuration, the movable clip of the frame is first moved toward the center of the frame so as to be close to the center of the frame, and then the lining of the sewn material consisting of the outer material and the lining is strongly prevented from wrinkling. While pulling, hook the end to the hook of the support arm and stretch it inside the frame. On the other hand, the outer material is held between the clips with the ends sandwiched and stretched into the frame. Then, move each clip along the support arm by strongly pulling each clip that was movable on each of the two opposite sides of the frame together with the sandwiched outer material, and moving it along the support arm, working after completely stretching the outer material and removing wrinkles Completed. During work, the outer material can be pulled without making any holes. In addition, since the outer material and the lining are pulled separately, the tension can be changed to achieve an optimal condition.

In a configuration in which a flexible thin plate-like cover for covering the needle tip of the hook is provided, when the lining of the sewing object is hooked on the hook, the cover is shifted from the needle tip, the needle tip is opened, and then the lining is removed. Hook through the needle point. After hooking the lining, replace the covering and cover the needle again to prevent the outer material from being in contact with the hook and being damaged when the outer material is sandwiched between the clips and pulled.

[0013]

An embodiment of the present invention will be described with reference to the drawings.
In this embodiment, a clip on one side of two opposite sides of a frame is movable along a support arm, a hook and a cover are attached to a support arm whose position is adjustable along the side of the frame, and a rack is used as holding means. This is an example used for a futon fabric stretcher using a nail. 1 is a plan view showing the embodiment, FIG. 2 is a sectional view taken along line AA of FIG. 1, FIG. 3 is a plan view showing a clip on the moving side of the embodiment, and FIG. 4 is a side view showing a clip on the moving side of the embodiment. FIG. 5 is an explanatory view showing a clip for holding a clip on the moving side of the embodiment, FIG. 6 is a plan view showing a clip on the fixed side of the embodiment, and FIG. 7 is an explanation showing a pulling operation of the futon fabric according to the embodiment. FIG. 8 and FIG. 8 are explanatory views showing the operation of moving the clip on the moving side according to the embodiment.

The frame 1 of this embodiment is formed by combining the frame material into a rectangle having a short side of about 2 m and a long side of about 2.5 m for stretching the futon cloth 17. Inside each side of the frame 1, the outer material 1
A clip 2 and a hook 13 that respectively hold a futon cloth 17 composed of 7a and a lining 17b are provided via support arms 6 and 7. The support arms 6 and 7 are mounted so as to be position-adjustable along each side of the frame 1, and can be fixed to the frame 1 by being fastened to the fixing bracket 15 with screws 16.
The support arms 6 and 7 include a movable support arm 7 to which the clip 2 is movably attached and a fixed support arm 6 to which the clip 2 is fixed. A movable type on one side of each of the two opposite sides,
Install the fixed type on the other side. A pawl 10 urged by a spring 11 is swingably attached to the movable support arm 7.
An extension arm 8 provided with the clip 2 at its tip is slidably fitted inside the lower U-shaped section of the support arm 7 and urged inwardly of the frame 1 by a spring 9. Clip 2
The extension arm 8 can move on the support arm 7 within a range restricted by the elongated hole 7a of the support arm 7 through which the spring mounting shaft 8b of the extension arm 8 passes. Normally, the mechanism does not move toward the center of the frame 1 due to the engagement between the claw 8a and the claw 10. However, when the pawl 10 is pushed down against the bias of the spring 11 to the opposite side, the extension arm 8 is released and can be moved by the spring 9 to the position closest to the center of the frame 1. The clip 2 for holding the outer material 17a of the futon at the tip of the extension arm 8 has a fixed lower jaw 2a attached to the extension arm 8 with an upper jaw 2b openably and closably, a lever 3 for opening and closing, a lower jaw 2a, and an upper jaw 2b. Are connected by pins 2c, and the upper jaw 2
When the lever b is opened and the lever 3 is pushed down, the upper jaw 2b is strongly closed and locked so as not to be easily opened. Also, a futon lining 17 is provided on both the left and right sides of the clip 2.
The hooks 13 holding b are attached to the support arms 7 via the attachment plates 12, respectively. On the upper side of the hook 13, there is provided a plastic free-flexing thin cover 14 which covers the needle tip and prevents the outer material 17 a of the futon from coming into contact with the hook 13 and being damaged. On the other hand, the same clip 2 as that of the movable type is directly attached to the tip of the fixed support arm 6, and the hook 13 is also attached together with the cover 14 via the attachment plate 12 in the same manner.

The method of using the frame 1 of this embodiment is as follows. First, the position of the seam 19 of the futon fabric 17 determined by the size and shape of the futon, the embroidery and pattern of the surface, and the clips 2 on each side of the frame 1
The support arms 6 and 7 are moved along the frame 1 so as to be aligned. After the alignment, the screws 16 are tightened to fix the support arms 6 and 7 to the frame 1. Then, the end of the movable support arm 7 on the side opposite to the claw 10a side of the claw 10 of the movable support arm 7 of the two sets of two opposite sides of the frame 1 which is the clip moving side is pushed down, and the clip 2 and the extension arm 8 are released, and they are moved toward the center of the frame 1 by the biasing force of the spring 9 to bring them closer to the center of the frame 1. Next, the outer material 17a
Lining 17b of the futon fabric 17 consisting of
The four sides are hooked and held on the hooks 13 on each side of the frame 1 while strongly pulling the ends thereof, and stretched into the frame 1 without wrinkles. Then, the four sides of the outer material 17a are sandwiched between the clips 2 on each side of the frame 1 opened by the lever 3, and the lever 3 is lowered to be securely held by the clip 2 and stretched into the frame 1. When the entire futon fabric 17 is stretched into the frame 1, the outer fabric 17a sandwiching the clip 2 on each support arm 7 on the side of the clip moving side is strongly pulled toward the outside of the frame 1 and moved to stretch the outer fabric 17a. Roll out wrinkles 18 and remove. At this time, the extension arm 8 to which the clip 2 is attached is
The clip 2 slides on the support arm 7 to the outside of the frame 1.
However, in this direction, the rack portion 8a of the extension arm 8 can push the claw 10 upward to move smoothly. When the operator releases the clip 2, the extension arm 8 and the clip 2 are moved by the spring 9 to the frame 1.
The rack 8 of the extension arm 8 tries to return inward.
Since the claw 10 engages with the groove of a and does not move, the position of the clip 2 is maintained, and the sandwiched outer material 17a can be maintained in a strongly stretched state. In this way, the outer material 17a is
When the sides are strongly stretched until the wrinkles 18 completely disappear, the stretch of the futon fabric 17 is completed. The futon fabric 17 is sent to the next sewing step together with the frame 1, and is sewn with straight and uneven stitches.

[0016]

According to the present invention, by adopting the above-described structure, the operation of gripping the sewn object on the frame and the operation of pulling the sewn object strongly to remove wrinkles can be performed separately. The work can be carried out easily and quickly, and labor and power to be used can be greatly reduced to improve work efficiency, so that only one worker can work in a short time. Further, the object to be sewn can be stretched basically without making a hole with a hook, and the object to be used is wide.

By adopting a configuration in which the position of the support arm can be adjusted along each side of the frame, the clip can be adjusted to the stitch position of the sewing object, which changes depending on the design such as embroidery or pattern, so that various types of sewing objects can be accommodated. In addition to this, it is possible to obtain a clean linear seam without wrinkles by pulling the seam position portion most strongly.

If a structure is adopted in which hooks for hooking and fastening the object to be sewn on the support arm are employed, the outer material and the lining of the object to be sewn are separately stretched over the frame and pulled, so that even if the outer material and the lining are different materials, It can be pulled correspondingly and can be easily and reliably wrinkled.

If a structure in which a flexible thin plate-like cover is provided to cover the tip of the hook is adopted, when the outer material of the sewn material consisting of the outer material and the lining is pulled with the clip, the product may be damaged due to the characteristic of the product. It is possible to prevent the outer material that the user wants to avoid from directly touching the hook, and also to prevent injuries and the like caused by contact of the worker.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a plan view showing a moving-side clip of the embodiment.

FIG. 4 is a side view showing a clip on the moving side according to the embodiment.

FIG. 5 is an explanatory view showing a clip for holding a clip on the moving side according to the embodiment.

FIG. 6 is a plan view showing a fixed-side clip of the embodiment.

FIG. 7 is an explanatory diagram showing a pulling operation of the futon fabric according to the embodiment.

FIG. 8 is an explanatory diagram showing a moving operation of a clip on the moving side according to the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Frame 2 Clip 2a Lower jaw 2b Upper jaw 2c Pin 2d Link 3 Lever 4 Backing rubber 5 Spring 6 Support arm 7 Support arm 7a Elongated hole 8 Extension arm 8a Rack part 8b Spring mounting shaft 9 Spring 10 Toe 10a Toe 11 Spring 12 Mounting plate 13 Hook 14 Cover 15 Fixing bracket 16 Screw 17 Futon cloth 17a Outer fabric 17b Lining 18 Wrinkle 19 Seam 20 Sewing machine head 21 Sewing machine bed 22 Guide rail

Claims (9)

(57) [Claims] 1. A plurality of clips for a fabric to be sewn such as a futon fabric or a curtain fabric are attached to the inside of each side of a rectangular frame, and the edges of each side of the fabric are sandwiched between the clips. In a stretchable frame for sewing, the clips are attached to each side of the frame via a support arm, and each of the clips on at least one of two opposite sides of the frame is supported. Along the arm
It is possible to move in the direction approaching and moving away to the opposite side ,
And a holding frame for holding a clip at a predetermined position. 2. The tension frame according to claim 1, further comprising holding means for enabling all clips of the frame to move along a support arm and holding the clips at predetermined positions. 3. The tension frame according to claim 1, wherein the support arm is attached to the frame such that the position of the support arm can be adjusted along the side of the frame. 4. A rack is mounted on the clip movable along the support arm along the support arm.
The support arm has a structure in which a pawl that engages with the rack is pivotally mounted in the middle in a swingable manner, and a spring is provided to bias the pawl into engagement with the rack, and the pawl is engaged with the rack to hold a clip. The sewing object tension frame according to claim 1, wherein the frame is a holding unit. 5. The tension frame according to claim 1, wherein the clip movable along the support arm is biased toward a center of the frame by a spring. 6. The tension frame for a sewing material according to claim 1, wherein a hook for hooking the sewing material on the support arm is attached so that a needle point is located beside a clip. 7. The tension frame for a sewn article according to claim 3, wherein a hook for hooking the sewn article on the support arm is attached so that a needle point is located beside a clip. 8. The tension frame for sewing material according to claim 6, wherein a flexible thin plate-like cover for covering the tip of the hook is attached to the support arm. 9. The tension frame for sewing material according to claim 7, wherein a flexible thin plate-like cover for covering the tip of the hook is attached to the support arm.