JPH0117715B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention is applicable to the edge of cylindrical fabric such as the torso of pants, skirts, pantyhose, and shorts, and the leg portion of shorts. The present invention relates to a sewing method in which a ring-shaped elastic belt is overlapped and sewn to the outside of the belt.

Prior Art As mentioned above, when an elastic belt is overlapped and sewn on the outside of the edge of a cylindrical fabric, the edge of the cylindrical fabric, which tends to be uneven, is covered by the elastic belt, resulting in a good appearance. This is preferable because it improves the quality of the product and increases the product value.

Conventionally, as seen in Japanese Patent Publication No. 60-43992, an elastic belt is wound around a fabric hanging roller with the front and back sides reversed, and the edges of a cylindrical fabric that is also reversed are attached. The cylindrical fabric is fitted onto the fabric hanging roller so that the end portion of the cylindrical fabric overlaps the elastic belt, and the overlapping portion between the edge of the cylindrical fabric and the elastic belt is sewn from the cylindrical fabric side. After that, the cylindrical fabric is turned inside out to obtain a sewn product.

Problems to be Solved by the Invention However, the work of repeatedly turning the front and back sides is extremely troublesome, and sewing machine suturing devices inherently have different stitches between the front and back sides, and naturally the front side is beautiful. Due to the structure of the sewing machine, the seams on the back side would be exposed when the sewing product was turned inside out, resulting in a somewhat unsightly appearance, so there was room for improvement. .

SUMMARY OF THE INVENTION An object of the present invention is to provide a sewing method that solves the above-mentioned conventional problems and can produce sewn products with high commercial value.

Means for Solving the Problems A method for sewing a cylindrical fabric according to the present invention to achieve the above-mentioned object has a method for sewing a cylindrical fabric according to the present invention, in which a plurality of sets of guide belts are arranged around a horizontal axis of rotation perpendicular to the sewing direction. A pair of rotary fabric edge guide devices that are reciprocally movable are disposed on both sides of the sewing machine suturing device in the sewing direction, and are fitted onto the pair of fabric edge guide devices and rotated by a guide belt. A fabric edge detection sensor is provided to stop driving the guide belt when the edge of the cylindrical fabric transferred to the rear side in the axial direction enters the reference stitching range. A belt hanging device for winding an elastic belt around the edge portion and a belt positioning device for regulating the winding position of the elastic belt wound around the belt hanging device in a predetermined manner are disposed,
The next step is to wind an elastic belt around the belt hanger and to adjust the elastic belt to a predetermined position using the belt positioning device; moving the guide belt rearward in the direction of the rotational axis so that the edge of the cylindrical fabric is fitted into the standard sewing range; A process of passing a belt overlapping the edge of the cylindrical fabric that has entered the reference sewing range, and sewing the overlapping part of the cylindrical fabric and the elastic belt by sewing the overlapping part of the cylindrical fabric and the elastic belt by rotating the pair of fabric edge guide devices synchronously. A sewn product is obtained through a step of suturing with a device, and a step of removing the sewn product by moving the guide belt forward in the direction of the rotational axis after cutting the thread after completing the specified suturing. It is.

Function: An elastic belt is overlapped with a predetermined relative positional relationship on the outside of the edge of a cylindrical fabric fitted into a pair of fabric edge guide devices, and the overlapping part is sewn from the elastic belt side. In this way, it is possible to obtain a sewn product with good-looking seams on the elastic belt side, with the elastic belt positioned outside the edge of the cylindrical fabric, without the need for turning the inside out. .

Embodiment First, a sewing device used in the method of sewing a cylindrical fabric according to the present invention will be described. As shown in FIGS. A cutter 2 is provided on the upstream side, and fabric edge guide devices 3, 3 are arranged on both sides of the sewing machine suturing device 1 and the cutter 2 in the sewing direction Q, and in the vicinity of the fabric edge guide devices 3, 3. , belt hanging mechanisms 4 and 5;
Position detection mechanisms 6, 6 for the edge of the cylindrical fabric, and edge position control mechanism 7 are arranged.

The left and right fabric edge guide devices 3, 3 are structurally the same, and are arranged in a plurality of sets (8 sets are exemplified) around the axis P in the horizontal direction perpendicular to the sewing direction Q. Belt mechanisms 8 are arranged radially, and each fabric edge guide device 3 is arranged rotatably in the same direction around an axis P by a synchronous transmission belt 9, and the guide belt mechanism 8 is , pulleys 10, 10 rotatable around an axis perpendicular to the rotation axis P are provided at intervals in the direction of the rotation axis P, and an endless guide belt 11 is wound around the pulleys 10, 10. The guide belt 11 is configured to be able to freely move back and forth in the direction of the rotation axis P.

Next, the belt hanging mechanism 4 on the downstream side in the sewing direction Q will be explained. This mechanism consists of a pair of upper and lower belt hanging tools 12 that are extendable in two stages in the direction of the rotation axis P,
12 are provided on arms 13, 13 which are swingable around the axis in the direction of the rotation axis P, and more specifically, the tips of the belt hooks 12, 12 are located near the tip of the fabric edge guide device 3. a first stretched state A in which the tip is contracted and located near the rear of the fabric edge guide device 3 (see FIG. 9); and a contracted state C in which the tip is further contracted.
(See FIG. 11), and by swinging the arms 13, 13 in the second extended state B, the belt hooks 12, 12 are positioned away from the fabric edge guide device 3. 1st state D (8th state
(see figure) and the second one located on the side of the fabric edge guide device 3.
It is configured to be freely switchable between state E (see FIG. 7).

Belt positioning devices 14, 14 are provided near the tips of the belt hooks 12, 12 when the belt hooks 12, 12 are in the first state D and the second extended state B.

The belt hanging mechanism 5 on the upstream side in the sewing direction Q is
A mechanism having the same configuration as the belt hanging mechanism 4 on the downstream side (the same components are given the same reference numerals and explanations are omitted) is arranged line-symmetrically, and furthermore, the belt positioning surface is the same as the belt positioning device 14. The second belt positioning tool 15, which is flush, is switched between an operating state F in which it approaches the fabric edge guide device 3 (see Fig. 13) and a non-operative state C in which it moves away from the fabric edge guide device 3 (see Fig. 6). It can be set up freely.

Then, as shown in FIG. 7, the belt positioning devices 14 of both belt hanging mechanisms 4 and 5 are put into the first extended state A and the second state E, and the endless elastic belt 16 is attached to the belt positioning devices 14. The belt positioning tool 14 is moved from the first state D to the second extended state B (eighth
and FIG. 9), and as shown in FIG. 10, the pair of fabric edge guide devices 3,
3, and the guide belt 11 of the fabric edge guide device 3 is aligned with the axis P.
It moves it backwards.

Here, when the belt positioning tool 14 is switched to the second extension state B, if the winding position of the elastic belt 16 wound around the belt positioning tool 14 is further back than the predetermined position, As the belt hanging tool 12 moves to the second extended state B, the elastic belt 16 comes into relative contact with the belt positioning tool 14, so that its winding position is regulated as specified.

On the other hand, when the edge of the cylindrical fabric 17 is transferred to a position where it overlaps the elastic belt 16 (that is, the reference sewing range), the edge position detection mechanism 6, 6
is detected, and in conjunction with this, the drive of each of the fabric edge guide devices 3 is stopped individually.

As shown in FIG. 3, the position detection mechanisms 6, 6 for the edge of the cylindrical fabric consist of edge detection sensors each having two projectors 6a and two light receivers 6b, and are rotated by the cylindrical fabric 17. When the optical path on the front side in the axis P direction is blocked, in other words, when the edge of the cylindrical fabric 17 enters between the two light receivers 6b, 6b, the drive of the fabric edge guide device 3 is stopped. It's becoming like that.

The light receiver 6b is provided on a member 18 that is movable in the direction of the axis P.

In another example, the position detection mechanism 7 for the edge of the cylindrical fabric includes a plurality of floodlights 7a and a line sensor 7, respectively.
Consists of b... The line sensors 7b... are provided on the lower surface side of the separator 19, which will be described next.

The separator 19 can be freely changed into a working position H (see Figure 6) in which it protrudes between the elastic belt 16 and the cylindrical fabric 17, and a non-working position I (see Figure 3) in which it retreats to the rear side. A third belt positioning tool 20 is provided on the upper surface portion and is flush with the positioning surface of the belt positioning tool 14 in the working position H, and is switched to the working position H when hanging the fabric.

Now, next, the elastic belt 16 and the cylindrical fabric 1
7 is in the predetermined position as described above, the belt hook 12 of the belt hook mechanism 4 on the downstream side in the sewing direction Q is moved to the second belt hook 12 as shown in FIG.
When switching from the extended state B to the contracted state C, the elastic belt 16 positioned by the belt positioning tool 14 comes off from the belt hanging tool 12 and
As shown in the figure, in a state where the elastic belt 16 overlaps the edge of the cylindrical fabric 17 due to the contraction and restoring force,
An elastic belt 16 is stretched around the edge of the cylindrical fabric 17.

Note that without switching the belt hook 12 from the second stretched state B to the contracted state C, the belt hook 12 is switched from the first stretched state A to the second stretched state B, and the elastic belt 16 is moved to the cylindrical fabric 17. Alternatively, the elastic belt 16 may be passed over the edge of the cylindrical fabric 17 by switching the belt hook 12 to the contracted state C.

After the elastic belt 16 is stretched, the ruler 21 that restricts the forward movement of the elastic belt 16 is lowered (see Fig. 4), and then the pair of fabric edge guide devices 3 are rotated synchronously to form a cylindrical shape. The fabric 17 is rotated and transferred, and the sewing machine sewing device 1 is operated to stitch the overlapping elastic belt 16 and cylindrical fabric 17 from the elastic belt side. When the sewing start end reaches the vicinity of the belt hanging mechanism 5 on the upstream side in the sewing direction Q, as shown in FIG. Hang 1
2 and 12 are switched to the contracted state C and suturing is continued. Next, when the suture starting end reaches near the separator 19, the separator 19 is switched to the non-working position I and the ruler 21 is raised.
After the stitching is continued so as to overlap the stitching start ends, the sewing machine stitching device 1 and the fabric edge guide device 3 are stopped.

After the stitching is completed, the thread is cut, and then the guide belt 11 of the fabric edge guide device 3 is driven in reverse to transfer the sewn product after the stitching is completed to the front side of the fabric edge guide device 3. Sewing is finished by taking out the sewing item from step 3.

Next, to explain the position control mechanism of the fabric edge, the position detection mechanism detects a large number (for example, 20
The light emitter 7a consists of a licensor 7b in which a large number of light receiving elements are arranged, for example.
a are arranged side by side in the direction of the rotation axis P, and when the separator 19 is switched to the operating position H, the licensor 7b provided on the lower surface side of the separator 19 is configured to correspond to each of the projectors 7a. In addition, as shown in FIG.
When the width of the 15th and 17th pieces from the front in the direction is set as the standard stitching range J, and the edge of the cylindrical fabric 17 is located within the standard stitching range J, the cylindrical fabric 17 is The fabric is transported by a pair of fabric edge guide devices 3, 3, and stitched by the sewing machine suturing device 1, and the edge of the tubular fabric 17 deviates from the reference stitching range J. The range up to the two front and rear light receiving elements in the axis P direction (that is, the 13th and
15th, 17th, and 19th) When entering K, move the fabric edge guide device 3 on the upstream side of the sewing direction Q so that the edge of the cylindrical fabric 17 falls within the reference sewing range J. A control mode is adopted in which the guide belt 11 is moved in the direction of the axis P.

On the other hand, as shown in FIG. 14, in the cylindrical seam portion of the cylindrical fabric 17, if the edge portion of the cylindrical fabric 17 is sewn with a large difference in level, the edge portion may be sewn in the above range. Since the state in which the insulation part K is out of alignment is detected for a certain period of time or more (for example, the time corresponding to the width l of the seam allowance), in this case, the cylindrical fabric 17 is Taking into account the transfer amount of control is now in place.

However, even if the edge part deviates from the above range K, if it remains for a certain period of time or less (for example, if a part of the fabric protrudes from the edge part),
The control form by the above position control mechanism 7 is
This is disclosed in detail in Publication No. -43991.

In addition, if the cylindrical fabric 17 in which the cylindrical seam portion does not have a large difference in level is to be targeted, the fabric adhesion control mechanism 7 is controlled by the two sensors 6, 6.
It is also possible to control the end edge portion to fall within the standard suturing range J determined by the two sensors.

Effects of the Invention As explained above, the method for sewing a cylindrical fabric according to the present invention has a method of sewing an elastic material with a predetermined relative positional relationship on the outside of the edge of a cylindrical fabric fitted in a pair of fabric edge guide devices. This method involves polymerizing the belts and sewing the overlapping portion from the elastic belt side, without requiring the conventional work of turning the elastic belt and cylindrical fabric inside out, and without further reversing the front and back sides after sewing. With the elastic belt positioned outside the edge of the cylindrical fabric without turning it over, it is possible to obtain a sewn product with good-looking seams on the elastic belt side, and the sewing method is simple. Through significant improvements, it has become possible to solve the problems in the prior art.

[Brief explanation of drawings]

The drawings show an embodiment of a sewing device for tubular fabric used in the method of the present invention, in which FIG. 1 is an overall front view, FIG. 2 is a side view, and FIG. 3 is a plan view. FIG. 4 is a front view of the main part, and FIG. 5 is a partial plan view thereof. Figure 6 is a perspective view of the main components, Figures 7 to 1
FIG. 3 is an explanatory diagram of the operation, and FIG. 14 is an explanatory diagram of cutting of the uneven portion. DESCRIPTION OF SYMBOLS 1... Sewing machine suturing device, 3... Rotary fabric edge guide device, 6... Position detection mechanism, 11... Guide belt, 12... Belt hook, 14... Belt positioning device, 16... Elastic belt, 17...Tubular fabric, J...Reference suture range, P...Rotation axis, Q
...suture direction.

Claims (1)

[Scope of Claims] 1 A pair of rotary fabric edge guide devices each comprising a plurality of sets of guide belts movable back and forth in the direction of the rotation axis perpendicular to the sewing direction are used for sewing machine stitching. The edge of the cylindrical fabric placed on both sides of the device in the sewing direction, fitted in the pair of fabric edge guide devices, and transferred to the rear side in the direction of the rotation axis by the guide belt is the reference stitching range. a belt hook for winding an elastic belt around the edge of the cylindrical fabric in the reference sewing range; A belt positioning device is arranged to adjust the winding position of the elastic belt wound around the belt to a predetermined position, and the next step is to wind the elastic belt around the belt hanging device, and to attach the elastic belt to the belt. a step of positioning the cylindrical fabric in a predetermined position using a positioning tool; and a guide belt so as to fit the edge of the cylindrical fabric into the pair of fabric edge guide devices so that the edge of the cylindrical fabric falls within the standard sewing range. a step of moving the elastic belt to the rear side in the direction of the rotation axis, and a step of hanging the belt so that the elastic belt wound around the belt hanger overlaps the edge of the cylindrical fabric that has entered the reference sewing range; a step of synchronously rotating the pair of fabric edge guide devices to sew the overlapping portion of the cylindrical fabric and the elastic belt using a sewing machine stitching device; A method for sewing a cylindrical fabric, comprising: a step of moving the fabric toward the front in the direction of the core to take out the sewn article; and obtaining a sewn article through the above steps.