JPS59135092A - Method of sending fabric to two directions in quilting sewing machine - 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 The present invention relates to a method for bidirectionally feeding fabric and interlining to stitch a continuous product unwound from a roll according to a predetermined design. The method is suitable for use on quilting machines and general purpose embroidery machines. Thus, the method according to the invention is particularly suitable for quilting machines, but can also be applied to embroidery machines, with the method allowing continuous work on these machines even in the case of complex designs and embroideries. Is possible.

Although an example application of the method will be described below with particular reference to a quilting machine, it will be understood that the configuration of the machine can be easily modified for application to a continuous embroidery machine.

In the case of known types of quilting machines, one or more layers of interlining, stuffing, etc. are fed out together with one or more strips of fabric, which, after wrapping around the interlining, are then stitched according to a predetermined design. It is fixed to the core material. Stitching is performed via a number of needles moving downward at predetermined times during the forward movement of the product. In order to implement non-trivial stitch designs, quilting machines move the product laterally via a laterally movable carriage suitably linked to the advancing movement of the fabric. However, for example, US Pat. No. 4.106.417 and US Pat.
Despite the adaptability of this type of sewing machine described in No. 262.613, there is a need for the implementation of stitches of a particularly elaborate design, in which case the forward movement and lateral movement of conventional devices That is not enough.

Many systems have been proposed for retracting part of an already stitched product in order to add additional stitches of a more complex design to the product. It is not sufficient for the following reasons.

The proposed solutions are essentially divided into two types. In the first method, the entire carriage is arranged to be movable not only laterally but also longitudinally so that a predetermined part of the product to be subsequently applied with additional stitches can be retracted. Although this method at least partially solves the problem of maintaining constant alignment of the two pieces of fabric surrounding the interlining, it also
The drawbacks are that the return stroke is limited and the construction is very complex and difficult to adjust. This naturally has an impact on manufacturing costs, and the drawback of misalignment between several sets of stitches performed in different processes cannot be completely eliminated.

According to the second method, roller pairs or other return mechanisms are used that act directly on the axis of the fabric, thereby simplifying the construction of the machine. In this case, it is extremely difficult to maintain a constant tension in the fabric during the return operation, and the stitches performed later will be misaligned with respect to the stitches applied earlier, so the quality of the product obtained by this method is only as good as the first one. The method is even worse. It is essential for good quality quilting (and/or embroidery) that the stitches added at each step correspond perfectly, which requires constant fabric tension. If the tension is not maintained constant, the finished product will be visually inconsistent, deformed in design, and have other unacceptable defects both aesthetically and technically.

Furthermore, other special systems have been proposed, but they have severely limited return operations and are therefore virtually unfit for purpose.

SUMMARY OF THE INVENTION Therefore, one object of the present invention is to provide a fabric feeding method for applying multiple sets of stitches to a product, especially a quilted product, the fabric feeding method being a fabric feeding method for applying multiple sets of stitches to a product, particularly a quilted product. , through a return movement of a predetermined and substantially large-area portion of the material, which movement, for example in the case of the first embodiment, involves winding up a portion of the unwound product onto a cylindrical surface. It is carried out under constant tension.

In another embodiment, the winding under constant tension is carried out via a return roller, the shaft of which is movable continuously and synchronously between a first and a second position. . During the normal forward movement of the fabric, i.e. when the fabric is unwound from the roll,
The roller is placed in the first position, while during the return phase of the fabric the roller moves to the second position so that it receives the required amount of fabric from the machine without any influence on the fabric roll and rotates the fabric roll. is prevented.

Since the return movement of the fabric is highly controlled, when this system is applied to a multi-needle quilting machine, the machine can quilt small and medium-sized designs. It is also possible to quilt large panel designs that were previously only possible with needle sewing machines. There are three major economic advantages when applying this system. That is, a large number of needles can be used, the quilting is done continuously from a roll, and there is no need to use paneled fabric and interlining.

Another object of the invention is to provide a method of the above-mentioned type, characterized in that it can be used for continuous embroidery of fabrics. Currently, embroidery is performed using large frames that operate discontinuously. In other words, if you are trying to embroider, it should be long (15-20 meters) or fairly wide (1-1.5 meters).
meters) of fabric is placed under tension in a very complex vertical frame suitable for stitching the desired design. In this case, a machine with dimensions prohibitive for normal industrial production would be required, but by using the method of the present invention, it is possible to perform kana and complex embroidery, even if the work is not completely comparable to the work of a frame-hole embroidery machine. can be carried out continuously and on machines of ordinary size.

Yet another object of the invention is to provide a quilting sewing machine using the method described above.

The invention will now be described with reference to two preferred but non-limiting embodiments of a quilting machine with reference to the accompanying drawings.

1 and 2, a quilting machine according to the invention is shown with a carriage 1 on which the product to be quilted is stretched.
The product consists of a fabric strip 2, a core material 4 and another fabric strip 3 forming the lining.

For the sake of simplicity, a quilted product is assumed in which a core material is inserted between two layers of cloth, but the present invention also provides for a quilted product comprised of two or more layers of core material and a corresponding number of layers of cloth. It can also be applied to cases where the fabric is made of only one piece of cloth without using a core material.

The fabrics 2 and 3 are placed in suitable containers or bushes 10 and 1.
It is fed out from rolls 8 and 9 respectively housed in 1. The antenna is cylindrical in shape and has a notch corresponding to the fc opening 18, which is provided in an arc shape with an angle larger than 90° and smaller than 180°.

The role of the opening 18 is to guide the fabric roll into the container and to allow removal of the fabric during unrolling.

Since the second fabric roll container (and other containers) is substantially identical to container 10, container 10
Only the configuration and operation will be explained.

A limit switch 20 and a locking device 21, which will be described later, are arranged at a position corresponding to one end of the opening 18. A limit switch 2 is provided at the other end of the opening 18.
2 is placed. The container is fixed to the carriage and supports the shaft 30 of the roll 8 in a braking manner, so that the forward unwinding of the fabric via the drive rollers 40, 41 takes place under constant tension and is properly controlled by the braking device 60. adjusted and synchronized. The fabric section previously specified by the design programmer is unwound from the roll 8 and spread out on the carriage together with other elements, and during this forward movement the needle 50 performs a first series of stitches in substantially known manner;
The forward movement of the product and the lateral movement of the carriage are adjusted accordingly. Next, the forward movement is stopped, and the cloth portion facing the limit switch 20 is moved to the container 1 by the clutch 21.
00 Locked against the cylindrical surface. At the same time, roll 8
The shaft 30 of is locked to the container 10 via an electromagnetic clutch 46, and the entire device is communicatively coupled to cloth drive rollers 40 and 41 via transmissions 51 and 52. In this way, a rotational movement in the opposite direction to the forward movement is started,
The cloth 2 is therefore the cylindrical surface 1 which constitutes the outer surface of the container.
It is wrapped around the 0 part. Since the fabric engages the clutch 21 and is wrapped around a wide cylindrical surface of constant diameter, precise human tensioning and mutual positioning of the fabrics 2 and 3 is possible during the return movement of the fabric. Once the return movement has been completed, i.e. the fabric has been unwound to the furthest position from the limit switch 22 on the cylindrical surface within the programmed range, the forward and/or lateral drive movement is typically resumed and the appropriately programmed Additional stitches may be added to the needle support bar 49. It is also possible to perform stitches during the return phase if desired, or it is possible to perform various forward and return movements depending on the stitch design used.

The maximum length of the fabric part to be retracted, i.e. of the product part that can be clutched overlapping, is equal to the circumference of the outer surface of the container 1o and is, to a large extent, independent of the diameter of the fabric roll.
Kana can be selected from a wide numerical range. Preferably, the diameter of the container 1o is chosen to be close to the maximum value compatible with the dimensions of the machine and the maximum return stroke. If the return travel required for quilting is less than these values, it can be done by using the design programmer's signals or by determining the return travel distance and comparing this to the programmed value.
The return operation can be stopped at an early stage.

As can be seen from the above description, the device according to the invention has dimensions substantially equal to that of a standard quilting machine.
However, it is possible to return the cloth over a very long distance, which was previously not possible, and during forward movement, the brake is used to
Moreover, during the return movement, a certain tension is applied to the fabric through the engagement between the fabric and the surface of the container 10, so that this movement of the fabric is very precise and reliable, thus ensuring that the fabric and core material Misalignment is avoided.

When applying the method according to the present invention to a continuous embroidery sewing machine,
The method of application is substantially the same as for quilting described above. A container 10 is provided with the folded single roll of fabric, a number of needles, and preferably a diameter sufficient to allow embroidery over a large area of the fabric.

3 and 4 show a variant of the quilting machine according to the invention, which includes a carry 101 on which the product to be quilted is stretched, the product comprising a fabric web 102, a core material 104 , and another fabric web 103 forming the lining. For the sake of simplicity, we will discuss the case of a quilted product in which a core material is inserted between two layers of fabric; however, in this case too, the present invention provides a method for incorporating one or more layers of core material and a corresponding number of layers of fabric. It can also be applied to quilted products containing a core material or a single piece of cloth that does not contain a core material.

Fabrics 102 and 103 are unwound from rolls 108 and 109 supported on respective shafts 180 and 190, and
80 and 190 are mounted on the carriage of the sewing machine. Since the operations of the rolls are substantially the same, the configuration and operation will be primarily described with respect to the fabric web 102 only.

Along the feed path extending between the fabric roll 108 and the product support surface, a return roller 185 having a fixed axis and an axis 1
Rollers 160 supported by rollers 65 are arranged between which the fabric strip 102 moves. Roller 160 is essentially a return roller or dancer roller and is
The axis of is movable continuously between a first and a second position, the second position being lower than the first position.

For clarity, the rollers are shown in an intermediate position in FIG. The roller 160 is the pinion 1 attached to the shaft 197.
84 and is movable according to the rank 165 that engages with it. The shaft 197 is rotatably connected via a friction clutch 192 to product-transfer drive rollers 140 and 141, the operation of which is under the control of a central control unit (not shown) (such that product retraction is possible). ) Reverse direction is possible. The connection takes place via transmission chains 151 and 152, to which the movement of the rollers 140, 141 is transmitted only after the clutch 192 has engaged the shaft 197. The cloth roll is fixed by the clutch 177, and the cloth during the return operation is kept under constant tension by the downward movement of the movable row 2160.

During the forward motion of the fabric 102, the fabric is exposed to an adjustable brake 178.
At the same time, a first series of stitches is applied to the product made by inserting the core material 104 between the fabrics 102 and 103 via the needle 150. Once the product has been advanced a predetermined distance, it is returned at least once via the dancer row 2160 under the control of the design programmer. When control of the movement of the fabric portion is transferred to the dancer rollers, the fabric is subjected to a range and number of back and forth movements adapted to the complexity of the design to be reproduced. More precisely, this method allows for a single backward movement of the fabric in addition to the normal forward movement (feeding out the fabric from the roll), and only in the case of a simple 9-turn stitch, during this return movement. Alternatively, during a subsequent forward movement (without unwinding the fabric from the roll) a second series 7 of stitches is performed, during which the system prepares for processing the next part of the product. In many cases, the stitches following the first series of stitches consist of a number of partial back and forth movements, which movements are controlled by rollers 140, 141 and transmitted by dancer rollers 160 to the fabric section being worked on. As will be appreciated, the processing method depends on the type and complexity of the design, the surface area on which the design is applied, the number of iterations, and the optimization criteria of the control system. The maximum length of the fabric portion that can be retracted depends on the maximum range of motion of the dancer rollers 160. Since this length is twice the maximum possible displacement of the roller, it is possible to retract very large areas of fabric with a very small (sic length) device.

In the quilting sewing machine shown in FIGS. 3 and 4, the second cloth row 2109 is arranged in a similar manner (shaft 171
Fixed row 2186' and movable row 2170 installed in
) and use the same two hooks 175. The connected rollers thus form a kind of vertically movable frame with a rigidity suitable for the necessary synchronization. It is also possible to use three (or more) fabric rolls as a multilayer product, as it can be adapted to the machine dimensions and maximum return stroke.

As is clear from the above description, the device according to the invention has substantially the same dimensions as a standard quilting machine, while being capable of reversing the fabric over very long distances 1 and braking during the forward motion. 178 and through the engagement of the fabric with the surface of the dancer rollers 160.170 during the retraction operation, so that this retraction operation is carried out with great precision, so that the fabric Misalignment between the core material and the core material is avoided.

When the method of the invention is applied to a quilting sewing machine in which the lateral movement of the carriage can be carried out with high precision, for example the sewing machine described in US Pat. A possible electronically controlled quilting sewing machine is obtained. Due to its maximum adaptability, this sewing machine can be used to stitch and embroidery virtually any design, no matter how complex.

The present invention covers adaptations and/or variations of both the method and the apparatus for carrying out the method which will be obvious to those skilled in the art.

[Brief explanation of drawings]

FIG. 1 is a schematic perspective view of a quilting sewing machine according to one embodiment of the present invention, FIG. 2 is a schematic side view showing the operation of the sewing machine, and FIG. 3 is a second embodiment of a quilting sewing machine according to the present invention. FIG. 4 is a schematic perspective view showing the operation of the sewing machine shown in FIG. 3. 1, 101...Carriage, 8.9, 108
, 109...Roll, 10.11...Container, 1
8...Opening, 20.22...Limit switch,
21.46.167.177.192・Ryo・Clutch,
40.41,140,141... drive roller, 50
... Needle, 51.52, 151, 152 ... Transmission, 60.168.178 ... Brake device, 160,170 ... Return roller, 165.175.
...Sick, 184...Pinion. Representative Patent Attorney Ima Mura Moto F Food Yu? 14. Procedure Valley 13. Book 21. Title of the invention: Two-way fabric feeding method for quilting sewing machine and quilting sewing machine using the method 3. Relationship with the case of the person making the amendment. Name of patent applicant: Mechanism. Etsse A Etsse di Canioni Landoni Kochi 4, Agent 1-1-14 Shinjuku, Shinjuku-ku, Tokyo
No. Yamada Building 5, Date of Amendment Order Vol. 2, Claims (11 for feeding fabric in two directions in a quilting sewing machine for stitching a product consisting of at least one web of fabric unwound from a roll) a) unwinding a web of fabric from at least one roll during a forward movement phase and applying a first stitch to the fabric during this forward movement; and b) stopping the movement of the rolls. c) causing the retraction operation to form a product by adding additional stitches while retracting the already stitched portion of the fabric one or more times; d) resuming normal unwinding of fabric from the roll after unlocking the roll. (2) A method according to claim 1, wherein during the retraction operation of the web, the web is fixed to a cylindrical portion around which the web is partially wound. (3) During the retraction operation of the web, the web is wound up by at least one return roller configured to move laterally between a first and a second position. The method described in item 1 of the scope. (4) A quilting machine of the type configured to apply stitches according to a predetermined design to a product consisting of at least two webs of material fed out by a rolling force, at least one of which webs is made of fabric. , a roll of fabric is housed in a cylindrical container, the container is partially open to allow passage of the fabric web unwound from the roll, and a portion of the fabric is placed outside the cylindrical container. means for locking to the surface and securing the container to the shaft of the fabric roll;
and means for connecting the container to the product drive roller prior to the start of the retraction motion. (5) the locking means includes a clutch for locking each cloth to the outer surface of the corresponding container; and the coupling means includes an electromagnetic clutch for engaging the shaft of the container with the transmission system. 5. A sewing machine according to claim 4, wherein the transmission system comprises a transmission chain connected to the cloth drive roller. (6) A quilting sewing machine of the type configured to apply stitches according to a predetermined design to a product consisting of at least two webs of material unwound from a roll, at least one of the webs being fabric; , each fabric roll is provided with a return roller configured to pass the fabric through it before reaching the stitching station;
# of said roller is movable from a first position in which there is substantially no stock of fabric to be unwound from the roll to a second position in which the stock is maintained to a maximum extent, and the rotation of the fabric and means for mechanically coupling the return roller to the fabric drive roller. (7) Two fabric rolls and two return rollers are provided, the return rollers being connected to a common movable frame via a binion rack system. sewing machine. (8) The support shaft of the cloth roll is equipped with a brake device and a clutch for locking the roll, and a shaft parallel to the return roller and the support shaft is disposed, and the shaft operates the frame. 8. A sewing machine as claimed in claim 7, further comprising a rest pinion and a clutch for providing two-way transmission to the drive roller during said controlled retraction phase.

Claims (1)

[Claims:] A method for feeding fabric in two directions in a quilting sewing machine for stitching a product consisting of at least one web of fabric unwound from 11 rolls, comprising: a) forward motion; unwinding a web of fabric from at least one roll and applying a first stitch to the fabric during this forward movement; b) stopping the movement of the rolls and locking the rolls in place; c) causing this reversing operation to form a product by adding further stitches during one or more retractions of the already stitched fabric section; and d) removing from the roll after locking the roll. and resuming normal feeding of the fabric. (2) A method according to claim 1, wherein during the retraction operation of the web, the web is fixed to a cylindrical portion around which the web is partially wound. (3) During the retraction operation of the web, the web is wound by at least one return roller configured to move laterally between a first and a second position. The method described in item 1 of the scope. (4) A quilting machine of the type configured to apply stitches according to a predetermined design to a product consisting of at least two webs of material unwound from a roll, at least one of which is fabric. can be,
A roll of fabric is housed within a cylindrical container, the container being partially open to allow passage of the fabric web unwound from the roll, and locking a portion of the fabric to the cylindrical outer surface of the container. and means for fixing the container to the shaft of the fabric roll and connecting the container to the product drive roller prior to the start of the retraction motion. (5) the locking means includes a clutch for locking each cloth to the outer surface of the corresponding container; and the coupling means includes an electromagnetic clutch for engaging the shaft of the container with the transmission system. 5. A sewing machine according to claim 4, wherein the transmission system includes a transmission chain connected to a cloth drive roller. (6) A quilting sewing machine of the type sb configured to apply stitches according to a predetermined design to a product consisting of at least two webs of material unwound from a roll, at least one of which is made of fabric; , each fabric roll is provided with a return roller configured to pass the fabric through it before reaching the stitching station.
The axis of the roller is movable from a first position in which there is substantially no stock of fabric to be unwound from the roll to a second position in which the stock is maintained to a maximum, sb, causing rotation of the fabric. A quilting sewing machine comprising means for locking and means for mechanically coupling a return roller to a fabric drive roller. (7) Two cloth rolls and two return rollers are provided, the return rollers 2 being connected to a common movable frame via a pinion rack system. The sewing machine mentioned. (8) The support shaft of the cloth roll is equipped with a brake device and a clutch for locking the roll, and a shaft parallel to the return roller and the support shaft is disposed, and a frame is attached to the shaft. 8. A sewing machine according to claim 7, further comprising a one-onion for operation and a clutch for providing two-way transmission to the drive roller during said controlled retraction phase.