JPS62249686A - Sewing of cylindrical cloth - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

Conventional Technology As mentioned above, when an elastic belt is overlapped and sewn to the outside of one edge of a cylindrical fabric, the end 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 heddle is wound around a fabric hanging roller with the front and back sides reversed, and the edge of a cylindrical fabric that is also reversed is 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.

5 Φ However, the work of turning the inside out, which is deformation, is very troublesome, and the sewing machine suture device originally has different seams on the front side and the back side, so it is natural that the front side will be different. Since the sewing machine is designed to produce a beautiful seam finish, when the sewing item is turned inside out, the seams on the back side will be exposed on the front side, resulting in a somewhat poor appearance, so there was room for improvement. be.

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.

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 helds are moved in the direction of the rotational axis around a horizontal axis of rotation perpendicular to the sewing direction. A pair of rotary fabric edge guide devices are disposed on both sides of the sewing machine suturing device in the sewing direction, and are fitted on the pair of fabric edge guide devices and are connected to the rotating shaft 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 core direction enters the standard sewing range, while the edge of the cylindrical fabric that is in the standard sewing range is provided. A belt hanging device for winding an elastic belt around the edge and a heald positioning device for regulating the winding position of the elastic belt wound around the belt hanging device are arranged, and the next step, namely, the belt a step of winding an elastic belt around the hanger and regulating the elastic belt to a predetermined position by the belt positioning device; and fitting an edge of the cylindrical fabric into the pair of fabric edge guide devices to tighten the tube. moving the guide belt backward in the direction of the rotational axis so that the edge of the shaped fabric falls within the standard sewing range; a step of passing a belt overlapping the edge of the fabric; a step of synchronously rotating the pair of fabric edge guide devices and sewing the overlapped portion of the cylindrical fabric and the elastic heddle with a sewing machine sewing device; , a step of removing the sewn product by moving the guide belt forward in the direction of the rotational axis after thread cutting after completion of the predetermined stitching;
The feature is that the sewn product is obtained through the process.

Elastic belts are overlapped 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, and the overlapping part is sewn from the elastic belt side. To obtain a sewn product with good-looking seams on the elastic belt side, with the elastic belt positioned outside the edge of a cylindrical fabric, without the work of turning the front and back sides.

First, the sewing device used in the method of sewing cylindrical fabric according to the present invention will be explained.As shown in FIGS. A cutter 2 is provided immediately upstream, and fabric edge guide devices 3.3 are disposed 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;
A position detection mechanism 6.6 for the edge of the cylindrical fabric and a mechanism 7 on the edge position side are arranged.

The left and right fabric edge guide devices 3.3 are structurally the same, and include a plurality of sets (eight sets are exemplified) around an 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 that are rotatable around an axis perpendicular to the 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. 11 is configured to be able to reciprocate 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. A belt hanger 12.12 is provided on an arm 13.13 that is swingable around an axis in the direction of the rotation axis P, and more specifically, the tip of the belt hanger 12.12 is connected to the fabric edge guide device 3. a first elongated state 8B located near the tip of the fabric edge guide device 3; a second elongated state 8B (see FIG. 9) whose tip is contracted and located near the rear of the fabric edge guide device 3; and a second elongated state 8B (see FIG. 9) where the tip is further contracted. The arm 13.13 is switchable between the contracted state C (see FIG. 11) and the second extended state B.
As a result of the swinging, the belt hanger 12 degrees 12 is placed in a first state D (see FIG. 8) in which it is located away from the dough edge guide device 3 and in a second state E (in which it is located on the dough edge guide device 3 side).
(see FIG. 7).

Then, the belt hook 12.12 when the belt hook 12.12 is in the first state GD and in the second elongated state IB.
A belt positioning tool 14° 14 is provided near the tip of 12.

The belt hanging mechanism 5 on the upstream side in the sewing direction Q has the same configuration as the belt hanging mechanism 4 on the downstream side (the same components are given the same reference numerals and the explanation is omitted), and is arranged symmetrically. At the same time, the second belt positioning tool 15, whose belt positioning surface is flush with the belt positioning tool M, is moved closer to the fabric edge guide device 3 (see FIG. 13).
and the non-acting state aG (sixth
(see figure).

Therefore, the belt positioning device 1 of both belt hanging mechanisms 4 and 5
4 into the first extended state A and the second state E as shown in FIG. 14 from the first shape gD to the second elongated shape BB (see FIGS. 8 and 9), and as shown in FIG. 10, the pair of fabric edge guide devices 3.
3 is fitted over the edge of the cylindrical fabric 17, and the guide belt 11 of the fabric edge guide device 3.3 is moved rearward in the axis P direction.

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 moves to the belt positioning tool 14.
As a result of relative contact with the winding member, the winding position thereof is regulated in a predetermined manner.

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 standard sewing range), the edge position detection mechanisms 6, 6 detect this and interlock with this. Then, the drive of each of the fabric edge guide devices 3 is stopped.

As shown in FIG. 3, the position detection mechanisms 6, 6 for the edge of the cylindrical fabric are each composed of an edge detection sensor using two projectors 6a and two light receivers 6b. When the optical path on the front side in the 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 has become.

Note that the light receiver 6b is a member 18 that is movable in the direction of the axis P.
It is set in.

In another example, the position detection mechanism 7 for the edge of the cylindrical fabric includes a large number of projectors 7a, line sensors 7b, . . . . The line sensors 7b... are provided on the lower surface side of the separator 19, which will be described below.

The separator 19 consists of the elastic belt 16 and the cylindrical fabric 17.
The position of the belt positioning tool 14 can be changed freely between a working position H (see Fig. 6) in which it plunges between A third belt positioning tool 20 that is flush with the positioning surface is provided on the upper surface, and is switched to the operating position H when hanging the fabric.

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

Note that without switching the belt hook 12 from the second extended state B to the contracted state C, the belt hook 12 is
Switching from elongated state MA to second elongated state B, elastic heald 1
6 to the edge of the cylindrical fabric 17, and then the belt hook 12 may be switched to a contracted GC, thereby passing the elastic belt 16 over the edge of the cylindrical fabric 17. .

After stretching the elastic belt 16,
lower the ruler 21 that restricts the movement of the
), the pair of fabric edge guide devices 3 are then rotated synchronously to rotationally transfer the cylindrical fabric 17, and the sewing machine suturing device 1 is operated to combine the elastic heald 16 and the cylindrical fabric in the overlapping state. 17 from the elastic belt side. When the sewing start end reaches near the belt hooking mechanism 5 on the upstream side in the sewing direction Q, as shown in FIG.
While switching the belt positioning tool 15 to the operating state F,
The belt hooks 12 and 12 of the belt hook mechanism 5 are switched to the contracted state C to continue sewing. Next, when the suture starting end reaches near the separator 19, the separator 1
9 is switched to the non-working position I, the ruler 21 is raised, and the stitching is continued so as to overlap the stitching start ends, and then 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 transport the sewn product after the stitching is completed to the front side of the fabric edge guide device 3.
Sewing is finished when the sewing product is taken out from the fabric edge guide device 3.

Next, to explain the position control mechanism for the fabric edge, the position detection mechanism includes a large number (for example, 20) of light projectors 7.
A line sensor 7b in which a and a large number of light receiving elements are arranged as an example.
. . . The projectors 7a are arranged side by side in the direction of the rotation axis P, and the separator 19 is placed in the operating position H.
The line sensor 7b provided on the lower surface side of the separator 19 is configured to correspond to each of the projectors 7a, and as shown in FIG. The width of the two light receiving elements (for example, the 15th and 17th from the front side in the axis P direction) is the standard suture range J.
When the end edge of the cylindrical fabric 17 is located within the base stitching range J, the cylindrical fabric 17 is directly transferred by the pair of fabric edge guide devices 3, 3, and the sewing machine stitching device 1, and the cylindrical fabric 1
The edge of No. 7 deviates from the reference suture range J, and the edge extends to the two front and rear light receiving elements in the axis P direction (that is, the 13th and 15th and the 17th and 19th). When entering K, the guide belt 11 of the fabric edge guide device 3 on the upstream side of the stitching direction Q is moved in the direction of the axis P so that one edge of the tubular fabric 17 is within the reference stitching range J. A form of control is now in place.

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. K is left out for a certain period of time (for example, the suture width l
In this case, the end edge is placed in the standard sewing range J, taking into account the amount of transfer of the cylindrical fabric 17 during the period from which the insulating part reaches the cutter 2. Insert the guide bell 1-11 into the shaft center P.
The needle is moved in the direction to cut the uneven part into a gentle slope, and at the same time, control is performed to make the suture line into a gentle slope.

However, even if the edge part deviates from the range K, if it is for a certain period of time or less (for example, when a part of the fabric protrudes from the edge part), the position control mechanism 7 is disclosed in detail in Japanese Patent Publication No. 60-43991.

In addition, if the cylindrical fabric 17 in which the cylindrical stitching portion does not have a large difference in level is to be targeted, the fabric adhesion control mechanism 7 is configured with two sensors 6.6, and the two sensors 6. It is also possible to control the end edge so that it falls within the standard suturing range J determined by the sensors.

1. As explained above, the method for sewing a cylindrical fabric according to the present invention is to attach an elastic material to the outside of the edge of a cylindrical fabric fitted in a pair of fabric edge guide devices in a predetermined relative positional relationship. The belt is superimposed and the overlapping part is sewn from the elastic heald side, and the method does not require the conventional work of turning the elastic belt and the cylindrical fabric inside out, and it is possible to sew the overlapping part from the elastic heald side. 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 the sewing machine for cylindrical fabric used in the method of the present invention; FIG. 1 is an overall front view, FIG. 2 is a side view, and FIG.
The figure 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 13
The figure 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 hanging tool, 14... Belt positioning tool, 16... Elastic belt, 17... Tubular fabric, J.
...Reference suturing range, P... Rotation axis, Q... Suturing direction. Fig. 2 1...Sewing machine 4 to 舊舊HA 1 3...cloud rot km 勺-Flood element 1T ID°old [1P...
Rotating shaft hair・Figure 7Figure 8

Claims (1)

[Scope of Claims] A sewing machine suturing device comprises 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 around a horizontal axis of rotation perpendicular to the sewing direction. The edge of the cylindrical fabric, which is placed on both sides in the sewing direction, is fitted into the pair of fabric edge guide devices, and is transferred to the rear side in the direction of the rotational axis by the guide belt has entered the reference stitching range. In some cases, a fabric edge position detection mechanism is provided to stop driving the guide belt, and a belt hook for wrapping an elastic belt around the edge of the cylindrical fabric in the reference sewing range, and a belt hook for winding the elastic belt around the edge of the cylindrical fabric in the reference sewing range are provided. A belt positioning tool is placed to adjust the winding position of the spun elastic belt as specified, and the next step is to wind the elastic belt around the belt hanging tool, and to move the elastic belt using the belt positioning tool. adjusting the guide belt to a predetermined position; and fitting 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 reference sewing range, and the guide belt is aligned with the rotation axis. a step of moving the elastic belt around the belt hanger to the end edge of the cylindrical fabric that has entered the standard sewing range; a step of synchronously rotating a guide device to sew the overlapping portion of the cylindrical fabric and the elastic belt with a sewing machine suturing device, and moving the guide belt forward in the direction of the rotational axis after thread cutting after completion of predetermined suturing. A method for sewing a cylindrical fabric, characterized in that a sewn product is obtained through the steps described above.