JPH11189965A - Punching apparatus for textile by rotary punching - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a punching apparatus for a textile, capable of penetratingly forming a round hole or the like having a clear outline inslantaneously in the textile by pushing a substrate onto a cylindrical blade of a circular punch installed under a throat plate of a swing machine by a cloth-lowering washer installed in a needle bar in a sewing machine head through a cloth lowering hole. SOLUTION: This punching apparatus is obtained by installing a rotary hollow punch 3 at the lower part of a throat plate 1 of a sewing machine so that a cylindrical blade 4 may be near to the lower surface of a base fabric 2 at the nearly center of a cloth-pushing down hole 1a to be punched, placed on the throat plate 1 having the cloth-pushing down hole 1a and needle-escaping hole 1b so as to be laterally moved, removing a sewing needle and a pressure bar for pressing down the cloth at the neighbor of the needle from a needle bar 7 in the machine head 6 of the sewing machine and attaching a cloth- lowering washer 8 for pushing the base fabric 2 onto the cylindrical blade 4 to form a circular hole through an attaching tool 8A to the needle bar 7 so as to be protruded from the machine head.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fabric punching device using a rotary punch which is suitable for use in punching holes in a fabric such as woven or non-woven fabric or a base fabric such as leather.

[0002]

2. Description of the Related Art As a device for sewing a hole pattern on a fabric,
Conventionally, for example, there is one described in Japanese Patent Application Laid-Open No. 8-158235. This conventional technique is a rotary knife that forms a hole in a base cloth in a rotating knife mounting base that descends while the needle bar of the automatic embroidery sewing machine is stopped and operable while the needle bar is stopped. A needle guide for guiding the sewing machine needle at the lower end of the needle bar is provided at the lower end of the elevating bar provided adjacent to the needle bar, and the needle bar and the elevating bar are formed in the base fabric by the rotary knife. This is a hole-shaped pattern sewing apparatus provided with interlocking means for interlocking the lowering rod to the lower limit and guiding the sewing machine needle only when a stitch is formed in the sewing machine.

That is, in this conventional example, during operation of the automatic embroidery sewing machine, the needle bar stops at the upper limit in response to a specific signal, and at the same time, the rotating knife mounting base is lowered to rotate the lower-pointed rotating knife to the embroidery bar. After "piercing" the pierced base cloth, the base cloth is pushed and spread to form a fuzzy small hole, and then the rotating knife mount is raised.
Next, the embroidery frame moves, the hole just formed moves immediately below the needle bar and stops, and then the needle guide descends at a slightly earlier timing than the sewing machine needle to hold the hole at a predetermined size.

[0004] Next, the sewing machine needle descends into the needle guide fitted into the hole as described above, forms a stitch, and rises. When the sewing needle goes up and the needle guide goes up, the embroidery frame moves and the holeless portion of the base fabric comes to just below the needle bar and stops, and then the sewing machine needle moves up and down to stitch the holeless portion. create.

Further, when the sewing needle on which the seam is formed rises and comes out of the base cloth, the embroidery frame moves again to move the hole portion of the base cloth immediately below the sewing needle, and the needle guide and the needle guide are moved in the same manner as the previous time. When the sewing needle and needle guide rise, the hoop moves. By forming a stitch around the hole provided in the base cloth by repeating the above-described operation, the area around the hole is so-called "sewn" to "snap" the base cloth.

[0006]

The drilling rotary cone referred to as a rotary knife in the above-mentioned prior art is a rotary cone as described in the above-mentioned prior art publication "0018" which is the only embodiment of this prior art. The lower end of the scalpel is pointed in the shape of a cone or a pyramid, and tapered blades are provided along these pyramids in all directions vertically like a glass pen before a long time ago,
"These blades have no blades so that they do not cut the cloth." In other words, in order to make a hole in the cloth with such a pointed rotary knife, as described above, while rotating the conical rotary knife, piercing the base cloth with no rest on the lower surface using the tension By forcibly spreading the base fabric with the rotating blades, a hole is made in the base fabric.
Therefore, since this hole will be drilled by penetrating the lower pointed cone into the base cloth, it is necessary to tighten the base cloth to the hoop, which is an essential problem that the hoop cannot be implemented without the hoop. There is.

[0007] Further, since the above-mentioned hole according to the conventional example is raised from the peripheral edge thereof and is fluffed, the raised portion is pushed and spread by a needle guide, so that "Kagari sewing" is performed as described above.
It is necessary to do "scratching" around the hole and to make the outline of the hole clear, which is troublesome and troublesome, and it is not possible to make beautiful holes in leather, plastic films and sheets. There are also problems.

Further, in this conventional example, since "gagging" is performed while expanding the hole by pressing the raised portion around the hole with a needle guide, only the peripheral portion of the hole becomes higher than the base fabric surface. In addition to the third problem that swelling in the form of a crater prevents flat “Kagari sewing”, it is not possible to drill a large hole with a diameter of 5 mm or more in the base cloth with a lower-pointed rotating cone called a scalpel. Many essential and
There are serious problems.

Aside from this conventional example, a method of drilling described in Japanese Patent Application Laid-Open No. Hei 9-217262, which was previously proposed by the present applicant, is also well known. This method requires at least 3
The sewing machine head is provided with at least one needle bar for performing embroidery stitching. The two needle bars of the sewing machine head each have a needle bar tip formed on a cutter blade, and one of the needle bars has a The other one should be in the direction perpendicular to the weft of the woven fabric so as to be in the direction perpendicular to the warp, and firstly, stitch stitching of the desired pattern to the appropriate portion of the woven fabric, and then The warped and weft threads are sequentially cut by the up and down operation of the cutter blade on the inner side of the stitched stitch to form a stitch stitching pattern shape, and then the overlocking of the peripheral portion formed by another needle bar is performed. This is a method for creating a pattern in sewing embroidery.

In this conventional example, two rectangular cutter blades each having a flat blade-like inclined surface are provided at the lower part of two needle bars for drilling a square hole or a circular hole at a drilled portion.
This is a method of perforating the fabric by separating and cutting the diameter yarn and the weft yarn of the fabric using a single cutter blade. Therefore,
Even when drilling a small acupuncture hole with a diameter of about 5 mm in the fabric, it is necessary to raise and lower the orthogonal two cutter blades about 20 times each for a total of about 40 times. In addition, the outline of the hole is unclear and a beautiful hole cannot be drilled.
There is an essential and significant problem of not being able to drill holes in the fabric.

According to the present invention, there is provided a sewing machine head for forming a circular hole in a cloth such as woven or non-woven fabric or a base cloth such as leather with a circular cutting edge of a cylindrical punch. It is an object of the present invention to provide a needle bar having a cylindrical punching rotary punch so that a round hole or the like having a sharp contour can be instantaneously provided in a fabric.

[0012]

The object of the present invention is as follows.
A base cloth to be perforated is stretched movably on a needle plate of a sewing machine having a hang down hole and a needle escape hole, and a cylindrical cutting edge is approached to a lower surface of the base cloth substantially at the center of the hang down hole. A rotating hole punch is provided below the needle plate, and while removing the sewing needle and the needle base fabric presser from the needle bar in the sewing machine head of the sewing machine, the base fabric is pressed against the needle bar against the cutting edge of the cylinder. This was achieved by protruding the cloth lowering seat for drilling the circular hole out of the sewing machine head with a fixture.

[0013] In addition, the sewing head is provided with a plurality of needle bars in parallel, and a needle bar other than the needle bar having the cloth lowering seat is provided with a needle base fabric holder and a sewing needle. It is also possible to overlock the periphery of the circular hole. As the cloth-down seat, a lower surface portion of a flexible fiber bundle in which metal or plastic rigid fibers are vertically densely arranged in a container having a lower surface opening, a lower surface of a fine bamboo or metal filament bundle or a rigid needle A pointed surface of a bundle, a frictional surface or a rough surface of a rigid / semi-rigid synthetic rubber column or a rigid or semi-rigid plastic column can be used.

[0014]

Embodiments of the present invention will be described with reference to the drawings. First, as shown in FIGS. 1 and 2, a basic embodiment of the present invention is a method in which an automatic frame or the like is provided on a cloth down hole 1a provided at a required position of a well-known needle plate 1 such as a metal in an embroidery sewing machine. A base cloth 2 such as a woven cloth to be opened is disposed, and provided below the cloth drop hole by a cloth drop seat 8 attached to a needle bar 7 of the sewing machine as shown in FIGS. The base fabric 2 is pressed against the cylindrical cutting edge 4 of the well-known rotary punch 3 as shown in FIG.
This is to make a circular hole 5 of about 0 mm.

In the present invention, first, a needle release hole 1b of the needle plate 1 in a known automatic embroidery sewing machine or a general sewing machine is used.
In the needle plate 1 in the vicinity of the lower hole 1a having a relatively large diameter.
1 and 2 as well as through holes 1a
In this case, the rotary punch 3 is suspended from the lower portion of the needle plate immediately below the needle plate.
The rotating hole drilling tool 3A is firmly vertically fixed to the lower surface of the needle plate 1 by a fixing piece 3B shown by a chain line in FIG.

Next, a sewing needle, a needle base fabric presser, and a lowering return spring of one of a plurality of needle bars 7 provided on a sewing head 6 of a known automatic embroidery sewing machine or a sewing machine are shown in FIG. The needle bar 7 is inserted into the holes of the upper and lower arms 8a of the vertically long U-shaped metal attachment 8A in the same figure as shown by a broken line in FIG. The needle bar 7 can be moved up and down as shown in FIG.
Moreover, it is arranged so as to be raised and returned by the ascending spring SP, and the fixing member 8A is screwed and fixed to a predetermined portion of the needle bar 7 with a set screw n as shown in FIG. Is provided with the ascending return spring SP slightly compressed by the set screw n.

Further, a cloth lowering seat 8 made of semi-rigid synthetic rubber or a resin column is inserted and positioned below the slitted vertical hole 8B of the mounting fixture 8A as shown in FIG.
The space between the front slits 8C of A is tightened and narrowed as shown in FIG. 2 with a set screw n screwed from the side surface of the fixture 8A through the slit 8C, thereby firmly fixing the cloth lowering seat 8 to the fixture 8A. 1 and 2 on the front of the sewing head 6
It is installed vertically so that it can be moved up and down.

In the present invention, the base cloth 2 arranged on the needle plate 1 is attached to the circular cutting edge 4 of the rotary punch 3 installed below the needle plate with the cloth lowering seat 8 by the chain line in FIG. In this manner, a circular hole 5 is formed in the base cloth 2 by pressing and rotating and contacting the base cloth 2 as shown in FIG. 5, and the cloth lowering seat 8 used in this apparatus is made of a metal or plastic filament in addition to the above example. It is also possible to use a bundle of filaments in which a number of flexible filaments or thin rod assemblies are bundled, or a bundle obtained by osmosis-hardening an adhesive liquid having a small viscosity to these bundles. As shown in FIG. 1, a plurality of the above-mentioned lowering seats 8 are provided in the vertical holes 8B of the mounting fixture 8A. You may make it possible to exchange and use it in order.

Next, an example of a structure for raising and lowering the needle bar 7 and the cloth lowering seat 8 attached thereto will be described. The two needle bars 7 are loosely inserted into holes of needle bar receivers 6A, 6A provided on the upper and lower sides of the front side of the sewing machine head 6 as shown in FIG. 1, and are always shown by solid lines in FIG. At the upper dead center position, the needle bar 7 on the left side in FIG.
A sewing needle 10 is provided in the same manner as a known embroidery sewing head. A needle bar 7 on the right side of FIG. 2 is provided with a cloth lowering seat 8 as shown in FIG.

On the other hand, the sewing head 6 is shown in FIGS.
A known head receiving arm 11 provided on a fixed beam 11A in an embroidery sewing machine as shown in FIG. By the movement of the needle changing rod 14 in the automatic embroidery sewing machine by the needle bar interval dimension as shown in FIG. In the middle of the two needle bars 7, the lifting piece 1
5 is fixedly protruding toward the rear (the right side in FIG. 1),
By moving the sewing machine head 6 with one of the lifting pieces 15 of the two needle bars 7 by means of the needle changing rod 14, a lifting cylinder 16 which selectively engages in a concave and convex manner is loosely inserted in the hole in the fixed longitudinal axis 17 thereof.
Are vertically provided inside the front side of the head receiving arm 11.

Further, the cloth lowering seat 8 is
In order to drive up and down, the rotating shaft 1 provided in the shaft cover 11B as shown in FIG.
8, a cam plate 19 eccentrically mounted as shown in FIG. 1 is rotatably disposed, and a lift arm 21 is provided below a lift ring 20 inside a roller bearing provided on the outer peripheral surface of the cam plate 19. 1, the front end of a rotating arm 22 of a rear shaft pivotally supported at its intermediate portion by a shaft 22A via a shaft 22B and a ring piece 23.
6 is pivotally connected to the protrusion 16A of No. 6 with a shaft 23A as shown in FIG.

In FIGS. 1 and 4, what is indicated by reference numeral 8D is a storage container for the down-seat 8, and FIGS.
, The one indicated by reference numeral 6B is a head cover,
Between the guide rail 12 of the head receiving arm 11 and the head slider 13 of the sewing machine head 6, rollers and balls are interposed between the guide rails 12 and the facing grooves as shown in FIG. 1 to assist the lateral movement of the sewing machine head 6 with respect to the arm 11. The lateral movement width is limited by the movement size of the needle changing rod 14 and a well-known stopper.

On the side of the rotary punch 3 close to the cutting edge, a hole 3a for removing the scrap from the base cloth 2 is naturally provided as shown in FIGS. Is a sewing needle 1 of the needle bar 7.
A known thread mannequin guides a needle thread (not shown) passed through the needle bar 7, and the thread mannequin is swung by a well-known means in association with the raising and lowering of the needle bar 7. Since it is not necessary on the side of the needle bar, it may be removed, but may be left as shown by the imaginary lines in FIGS.

In FIG. 1 and FIG. 2, the symbol P indicates a well-known wind turbine type rotary blade provided with an air flow from an air supply source such as a separately-known well-known compressor in the drilling tool 3A. A flexible pipe for jetting toward
Is a well-known flammable rotary hole drilling tool 3 that rotates at a high speed of about 100 to 300 times per second by the rotational force of the rotary blade.
Although A is used in the present invention, the rotary drilling tool may be a well-known electrical rotary cylindrical cutting tool such as a small high-speed electric drill.

Further, in order to prevent the cloth-hanging seat 8 from moving around the needle bar 7 in the horizontal arc direction, the needle bar 7 is formed into a square bar or a round bar with a vertical groove, and is rotated at the needle bar receiver 6A. The trochanter may be stopped, or the left and right side surfaces of the elevating and lowering pieces 15 and the mounting fixture 8A or the overhanging pieces may be trochantered by the side-movement restricting pieces (not shown because they may be well-known plate pieces) protruding from the sewing machine head 6. It is supported so that it can go up and down via a sliding member.

The fabric drilling device of the present invention is constructed as described above.
In the sewing machine, a cloth, leather, or other sheet-like base cloth 2 to be perforated on the cloth down hole 1a of the needle plate 1 is stitched as shown in FIG.
When applied directly or as it is to an automatic embroidery sewing machine, it is arranged via a well-known automatic frame. Next, the needle replacement rod 1 for laterally moving the sewing machine head 6 for positioning.
4, only the lifting piece 15 of the needle bar 7 provided with the cloth lowering seat 8 among the two needle bars 7 in the head 6 is moved up and down at the top dead center of the needle bar 7 as shown by the solid line in FIG. While rotating the punch 3 at a high speed of about 200 to 300 times per second by supplying air from the pipe P into the drilling tool 3A.

Thereafter, when the rotary shaft 18 is rotated by a known drive means and a rotation start command in the embroidery machine, the elevating ring 20 moves down by the eccentric dimension via the eccentric cam plate 19 as shown by the chain line in FIG. Due to this downward movement, the elevating arm 21, the rotating arm 22, the ring piece 23, the elevating cylinder 16 and the elevating piece 15 of the ring 20 are sequentially moved downward as shown by the chain line in FIG. 1 cooperate with each other as indicated by the chain line in FIG. By pressing the cloth down seat 8 as shown in FIG. 4, a circular hole 5 having a sharp outline as shown in FIG.

At the time of drilling, the needle bar 7 having the sewing machine needle 10 is, of course, immovable, and the base cloth 2 is opposed to its horizontal tension by the roughened rough surface at the lower part of the cloth lowering seat 8 or the friction lower surface. Since drilling can be performed while pressing against the cutting edge 4 of the rotary punch 3, lateral displacement during drilling of the base fabric 2 can be prevented,
The beautiful circular hole 5 was able to be drilled in the base cloth 2 instantaneously.
After drilling, the rotating shaft 18 is stopped at the top dead center of the cloth lowering seat 8 as shown by the solid line in FIG. Is restored to the original densely packed state by the inherent elasticity of the material, and the base fabric 2 itself returns to the horizontal state by self-shrinkage force or self-tension such as automatic frame stretching tension as shown in FIG. Since only a small dimension of about 1 to 2 mm is separated from the cylindrical cutting edge 4 of the punch 3 as shown in FIG.

[0029]

DESCRIPTION OF THE PREFERRED EMBODIMENTS After drilling a fabric hole, the periphery of the circular hole 5 of the base fabric 2 is sewn to prevent fraying.
By pulling the needle changing rod 14 in the direction indicated by the arrow in FIG. 2 and moving the sewing machine head 6 to the right by the needle bar interval, this time, the elevating piece 1 of the needle bar 7 having
By rotating the rotating shaft 18 after the concave / convex engagement of the shaft 5, the lifting arm 21 and the rotating arm 22 including the cam plate 19, the ring piece 23, the lifting cylinder 16, and the lifting piece 15 are sequentially passed. Only the needle bar with the sewing needle 10 moves up and down,
The edge of the circular hole 5 of the base cloth 2 could be sewn with the sewing needle 10 by the well-known sew-around needle operation.

The circular hole 5 is formed into a relatively small circular hole 5 having a hole diameter of about 2 to 3 mm by selecting the diameter of the punch cutting edge 4, and a large number of the circular holes 5 are formed along an arbitrary drilling contour. By continuously drilling a large number of holes adjacent to the cloth 2, holes of various shapes and sizes were formed in the base cloth 2 by an arbitrary drilling pattern such as a square or an ellipse formed by a large number of continuous circular holes 5. Further, the attachment 8A of the cloth-down seat 8 can be changed and deformed into various shapes such as a flat U-shaped one and a '' -shaped one other than the vertically long U-shaped one shown in the figure.

Further, the shape and size of the downhole 1a of the needle plate 1 can be selected to any shape and size, and the entire needle plate 1 in front of the rear edge of the downhole 1a. May be cut.

[0032]

The present invention adopts the above-described embodiment, and has the following effects. In the present invention, a base cloth 2 to be perforated is stretched movably on a needle plate 1 of a sewing machine having a hang-down hole 1a and a needle release hole 1b, and a base cloth substantially at the center of the hang-down hole 1a. 2 under the cylindrical edge 4
And a rotary punch 3 is disposed below the needle plate 1 to remove a sewing needle and a needle base fabric presser from a needle bar 7 of a sewing machine head 6 of the sewing machine. The base cloth 2 is pressed against the cylindrical cutting edge 4 to form a circular hole 5.
Since the cloth lowering seat 8 for drilling is protruded from the sewing machine head 6 by the attachment 8A, there is an industrial effect that a sharp contour hole can be instantaneously drilled in the fabric by the rotary punch. .

According to the second aspect of the present invention, a plurality of needle bars 7 are provided in parallel with the sewing head 6, and the needle bar 7 is attached to a needle bar 7 other than the needle bar 7 having the cloth lowering seat 8. By providing the cloth holder 9 and the sewing needle 10, it is possible to overlock the periphery of the circular hole 5 with the sewing needle 10, so that the edge of the circular hole 5 is sewn at almost the same location immediately after the hole is drilled. Was carried out, and the effect that the base cloth fray around the hole was completely eliminated was added.

[Brief description of the drawings]

FIG. 1 is an enlarged longitudinal sectional side view showing an example of an embodiment of the present invention.

FIG. 2 is a perspective view of a main part showing an example of an embodiment of the device of the present invention.

FIG. 3 is a perspective view showing a state before assembly of the one shown in FIG. 2;

FIG. 4 is an enlarged sectional view of a main part of the device of the present invention.

FIG. 5 is a sectional view showing a state different from that of the above.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 needle plate 1 a cloth lowering hole 1 b needle release hole 2 base cloth 3 rotary hole punch 3 A rotary hole drilling tool 4 cylindrical blade tip 5 circular hole 6 sewing machine head 7 needle bar 8 cloth lowering seat 8 A mounting tool 9 needle base cloth presser 10 sewing Needle 11 Head receiving arm 12 Guide rail 13 Head slider 14 Needle changing rod 15 Elevating piece 16 Elevating cylinder 17 Vertical axis 18 Rotating axis 19 Cam plate 20 Elevating ring

Claims (2)

[Claims] 1. A base fabric 2 to be perforated is stretched movably on a needle plate 1 of a sewing machine having a hang-down hole 1a and a needle release hole 1b, and a base substantially at the center of the hang-down hole 1a. Cloth 2
The rotary cutting punch 3 is arranged below the needle plate 1 by approaching the cylindrical cutting edge 4 to the lower surface of the sewing machine, and the sewing needle and the needle base fabric holder are removed from the needle bar 7 of the sewing machine head 6 of the sewing machine. A cloth punch 8 is pressed against the needle bar 7 to press the base cloth 2 against the cylindrical cutting edge 4 to form a circular hole 5. Drilling device. 2. A plurality of needle bars 7 are provided on the sewing machine head 6 in parallel, and a needle base fabric holder 9 and a sewing needle 10 are attached to another needle bar 7 other than the needle bar 7 having the cloth lowering seat 8. 2. The fabric punching device according to claim 1, wherein the sewing needle allows the peripheral edge of the circular hole to be overlocked by providing the sewing needle.