JPS6158683A - Panty stocking producing apparatus - 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 an apparatus for manufacturing pantyhose, and more specifically, a pantyhose usually called tights, which consists of two tubular stockings connected at the upper (open end) buttocks. This invention relates to a suturing device for sewing together tubular knitted fabrics.

The method for manufacturing tights is to first knit two tubular stockings, then from the open end of each tubular stocking,
Some products are sewn together in the lengthwise direction using overlapping rows of stitches for a certain length, and furthermore, a cut is formed between the seams of the overlapping rows to complete the finished product. Tights can also be made by first forming a cut in the seam portion and then sewing along the cut edge (or welding depending on the material of the knitted material). Still others form one seam and at the same time form notches. Known devices for performing such operations consist of two arms projecting in a cantilevered configuration from a fixed support structure placed in close proximity to each other, one above the other; A space is formed between them into which a tubular knitted fabric to be sewn is inserted during operation. These two arms are
a mechanism for sewing the stitches of the knitted fabric placed between the arms;
A cutter member is held that makes a longitudinal incision in the knitted fabric close to the seam to be sewn.

In such a suturing device, after suturing the two tubular sutures to be connected, the first operation is performed from the region that will become the waist region in the finished product toward the crotch region. This device simultaneously cuts the knitted fabric and sews along one of the cut edges. The operator must then rotate and reposition the knitted fabric to perform a second movement from the crotch to the waist. During this second operation, the remaining two cut ends are sewn together. Such methods require special care on the part of the operator, in particular rotating the knitted fabric after completing the first operation and holding the cut ends of the knitted fabric to be sewn close together during this second step. It is clear that care is required to produce clean seams.

To facilitate such a movement, it has been proposed to fit two stockings connected together to form a tight into two suitably shaped molds placed together (U.S. Pat. a7rtees issue), - The parts of the knitted fabric that are sewn together are sewn together by two parallel seams that touch each other and extend side by side from the point that becomes the crotch of the finished product to the open end of the stocking (the point that becomes the waist). be done. The fabric between the two seams is then cut. At this time, it is preferred that the two stockings remain fitted. The device used to carry out this method consists of a known suturing machine with two needles operating simultaneously and a cutting member that performs the cutting action between the two seams formed by these two needles. Become.

One of the drawbacks of this method is that the finished product remains separated at the crotch ends. Furthermore, these two parallel seams continue very close to the cut edge, and the stitching of these seams does not stitch the threads of the cut raw edge of the knit. This makes it impossible to prevent running lines from forming along the length of this cut during use of the finished tights, especially in the crotch area at the edge cut between the seams.

Furthermore, the cut edges of the knitted fabrics along the two seams remain raw edges, and these knitted fabrics are not far from the edges formed by the cutting, so it is clear that the edges are susceptible to unraveling. , Therefore, new transmission lines are likely to occur. When unraveling occurs, the seams tend to loosen. The technical problem of the present invention is to provide tights of the above-mentioned type, the quality of which has been improved, particularly in the crotch area, so that running lines, loosening, or unraveling near the seams are prevented as much as possible. You can manufacture things, and
The object of the present invention is to provide a device that can be manufactured extremely quickly and easily. According to the invention, there is provided a fixed support structure, two substantially horizontal parallel arms projecting from the support structure, one at the other; two pairs of needles that suture two stitches of the knitted fabric placed between the arms by reciprocating and separating the needles from the other arm; and a mechanism for making incisions in the knitted fabric between these, which is positioned in front of the needles in the direction of movement of the knitted fabric, and one pair of needles is connected to the other pair of needles in the direction of movement of the knitted fabric. The first needle of each of the two pairs of needles is located at a position offset from
located substantially in line with the device for making incisions in the fiber between the two seams, such that the first needle of each pair of buttons enters the incision made in the knitted fabric. two pairs of hooks, one pair of hooks being supported on one arm and the other pair of hooks being supported on the other arm, and these pairs of needles and hooks. It consists of a mechanism that supplies yarn to the needle and a mechanism that provides synchronized motion to the needle and hook, and forms two double rows of stitches on two tubular knitted fabrics in a single motion while forming an incision between the knitted fabrics. , two tubular knitted fabric suturing devices for producing pantyhose consisting of two tubular stockings, commonly called tights, which are connected to each other at their open ends, and which can form one pair of tights from two tubular knitted fabrics. provided.

One of the advantages of the suturing device according to the invention is that along each of the two ends formed by the cutting, the knitted tubular knitted fabric is fabricated by a double row of stitches extending parallel to and close to the cut end of the tubular knitted fabric. If desired, the double row stitching can give an excellent finish to the seams of the tights by making the threads at the cut end of the tubular knitted fabric into a knitted fabric. Another advantage of the invention is that the needle and cutting are aligned so that the sewing action precedes the cutting action at the beginning of the action. For this reason, the needle and the cutting section are installed offset with respect to the axial direction of the seam, so that the two rows of stitches intersect and the threads of the tubular knitted fabric are efficiently stitched at the crotch, making it possible to lengthen the length of the cutting section. The starting part of the seam is formed so that no running line occurs along the width direction.

Next, a preferred embodiment of the present invention will be described in detail by way of example with reference to the accompanying drawings.

In the accompanying drawings, in particular in FIGS. 1, 2, 13, 14 and 15, the suturing device according to the invention has a support structure 1 and two parallel cantilevered structures projecting therefrom. It consists of arms 2.3 which are horizontal in normal operation of the device and lie one above the other. The length of these arms 2.3 is slightly longer than the length of the seam formed by the device according to the invention. The arms are also positioned relatively close to each other so as to define a space between which the interlocking knits are interposed. These arms 2.3 have a hollow box-shaped cross-section and each accommodate a suitable part of the suturing device.

Close to the free end of the upper arm 2, two pairs of needles 9 and 9a are supported (see FIG. 13) block 8b, which are fixed by screws 8a to a block 8b with a stem 8C.
is fixed to this block 8a by inserting and locking the stem 8C into a hole 8d formed in another block 8. The block 8 is also formed with a through hole 8e (see FIG. 13), through which a fixed vertical axis 8f passes, and the block 8 is slidable along this vertical axis 8f. It is. The frame straight shaft 8f is fixed to the -1 wall of the structure of the upper arm 2, has an open bottom, and functions as a guide for the vertical sliding movement of the block 8b. The upper surface of the block 8 has a thread guide 1 formed with a plurality of inner holes.
0 is fixed, through which the thread feeding needles 9 and 9a of the device according to the invention pass.

Close to these hooks 9 and 9a and in the center position (
(described below), a cutter with a sharp blade 11 is fixed. This cutter is attached by screw lla (see Fig. 13).
It has a stem that is locked to the sinker llb. This sinker is fixed to part of the block 8 by screws llc. The sinker 11b has an inner hole li corresponding to the through hole 8e.
d is formed, and the guide hair vertical axis 8f passes through this through hole.

The block 8 also has a shaft 7 at one end of the double link rod 7.
A protrusion 8g connected by a is formed. The other end of the double link rod is connected to one arm of the rocker 5 by another shaft 7b. This rocker 5 is rotatably attached to a horizontal shaft 5a extending laterally within the framework of the arm 2. A fork-like bifurcated end portion 5b is formed on the arm opposite to the arm that connects with the double link rod 7, and this end portion allows one end 6 of the rod 6 to be connected to the arm.
supports the pin 6a attached to b (Fig. 2, 16
(see Figure and Figure 17).

The other end 6c of the rod 6 is connected to a crankshaft 6d (see FIGS. 16 and 17). The crankshaft axis extends horizontally within a fixed support structure l and is driven in a known manner by a prime mover (not shown).

Two hooks I2 and 12a are provided which operate in cooperation with the needles 9 and 9a, these hooks moving with a rotational amount about the longitudinal axis. Hook' 12 and 1
2a are attached to each of the holes 12b formed in the block 12c and are held to this block by screws 12d (
(See Figure 15). A through hole 1 is provided in the center of the block 12c.
2e is formed, into which a bushing 12f is inserted which is provided with a radial flange 12g at its lower end. The block +2c can be operated by a certain amount of rotation around the bush 12f. The upper end of the bush 12f protrudes doubly from the upper surface of the block 12c, and the clamp block 13
The inner hole 13a is inserted into the inner hole 13a formed in the inner hole 13a. Bush 12f
is clamped by this inner hole 13a. A lug 13b is formed on the side of the clamp block 13 at an angle of 90 DEG to the plane of the block so that the clamp block 13 can be fixed to the inner side wall of the upper arm 2.

During operation of the device according to the invention, a rotary reciprocating motion about the bush 12f is imparted to the block 12c, this motion being provided by the rod 14 (see FIGS. 15 and 17). A connecting member 14bt is held within the connector 2 and has a spherical socket connected at one end 14a to the crank of the crankshaft 6d and at the other end accommodating a spherical end 14c. This spherical end is attached to block 12c (see FIGS. 15, 17 and 19) to form a swivel ball joint.

Yarn guide 1 reciprocally movable close to hooks 12 and 12a
5 and 15a are provided. These thread guides 15 and 15a
is fixed to the rod 15b. Furthermore, this rod 15b is attached to the eccentric pin 15c via a connecting member 15d (see FIG. 15). The rod 15b is 2
The sinker 15g is slidably fitted into a vertical inner hole 15e passing through the protrusion 15f of the sinker 15g, which has two holes 15h. Two female threads 15i are passed through these holes 15h, thereby holding the sinker 15g on the clamp block 13.

The eccentric pin 15c is connected to one end of the link rod 1541, and the other end of the link rod is connected to the protrusion 15n of the block 12c by a screw 15m (see FIGS. 2 and 1).
(See Figure 5).

In this way, the block 1 pulled up by the rod 14
A rotational movement of 2c causes a corresponding rotational movement of thread guides 15 and 15a supported by rod 15b. The linkron 115 transmits the rotational reciprocating motion of the block 12c to the eccentric pin +5c, and this eccentric pin reciprocates by a certain amount of rotation about the axis of the rod 15b. Therefore, the rod 15b is subjected to a corresponding rotation t): backward movement about its axis.

The rotational movement of the thread guides 15 and +5a ensures the supply of each prefecture to the hooks 12 and 12a. Underneath the hooks 12 and 12a for each thread, a presser foot 18 is incorporated, according to a known arrangement, which serves to move the knitted fabric to be sewn at the seam opening. This presser foot +8 is fixed to the vertical bar 19 by a block +8a. The vertical rod bushing 12f is slidably penetrated therein. This vertical bar also has a transverse member 20 at the top with a hole 20a into which it is clamped.

The transverse member 20 projects from the side of the vertical bar 18 into a guide thrower 20b formed in one side wall of the two-part arm 2 (see FIGS. 2 and 18).

The lower arm 3 incorporates two one-part hooks 16 and 12 placed in positions functionally similar to the upper hooks 12 and 12a of the two-part arm. Lower hook 1
6 and 16a are fixed to a single shaft 17 axially apart from each other by screws 16b. This shaft 17 extends horizontally in the length direction of the r-section arm 3, and can be controlled by a suitable linkage mechanism (of a known type, not shown) to carry out the budding action by a prime mover (not shown). It will be done.

These hooks 16 and IEla are also each supplied with yarn in a known manner. As detailed below, the upper hook 12 and the lower hook 16 operate in cooperation with the paired needles 9, while the upper hook f2a and the lower hook If (a cooperate with the other paired needle 9a). Lower arm 3
The upper surface 21 of the rectangular upper plate 2 is horizontal at its free end.
1a (see Figure 19). This upper plate 21a is fixed by screws 21b and has a plurality of slots 21c formed in its length. Blades projecting from the feed blade 22 can project through these slots. This feed blade is fixed to the rod 23 in a known manner (see FIG. 2) and is actuated by a known mechanism (not shown because it is known) to appropriately combine longitudinal and lateral reciprocating movements. A movement is induced which causes a movement of the arms 2 and 3 from the support structure 1 towards the free ends of the arms 2 and 3, i.e. from the end 21 of the upper plate 21a towards the end 21i of the arms 2 and 3 along the upper plate. A feeding operation is performed for the tubular knitted fabric to be sewn along the seams in a direction parallel to the length direction.

Further, a cut hole 21d is formed in the center portion between the slots 21c of the upper plate 21a, and includes two cut portions 21e through which the needle 9 passes and two cut portions 21f through which the needle 9a passes. One of the two notches 21e and the two notches 21
One of the main holes 21d is formed by an elongated L-shaped slot, respectively.
It is connected to the. Notches 21e and 21f each form a pair
are located side by side, and the six pairs are formed slightly apart along the arm. One of the six pairs of notches 21e and 21f is positioned approximately on the center line 21g of the arm 3, as shown in FIG. A thrower 21h is also formed on the center line 21g, from which the end of the cutter blade 11 projects during operation.

An end 211 of the partial plate 2La is positioned on the free end side of the arm 3, and the other end 21 is positioned on the side of the support structure for the arm 3.

Notches 21e, 21f and slot 21 shown in FIG.
h corresponds exactly to the position of the needle 9.9a and the position of the cutter blade 11. For this reason, the cutter blade has needle 9,
Direct-L flow of these needles between 9a and the support structure for arms 2 and 3 (with respect to the direction of movement of the tubular knit during suturing)
Fixed.

The position of the needle 9.9a and the blade 11 is also clearly shown in FIGS. 6, 7 and 8. The needles 9 and 9a cross the space 4 between the arms and the upper surface 21 of the lower arm 3.
It protrudes perpendicular to the

To facilitate the positioning of the stockings connected according to the invention, two molds 24 are used (see FIG. 3),
Each of these molds is open on one side and is shaped to fit into the open end of the tubular stockings 25 and 26 that are connected to each other (see Figure 4).Sewing is performed. At this time, these molds 24 are placed only in the upper portions of the stockings 25 and 26, so that the upper portions of the stockings are stretched to form portions 25a and 28a to be sewn and cut.

After being attached to these molds 24, the parts 25a and 28a of the tubular knitted fabric to be sewn together and cut are made by sliding these molds 24 onto the arms 2 and 3 (see Fig. 5), so that the arms 2 and 3 support the parts 25a and 28a. The molds are brought to face each other by moving them along the arms (see FIG. 6) until they are close to the point where they are attached to the structure 1.

Once these molds and stockings are in place, the suturing device according to the present invention is actuated to produce the results shown in FIGS.
As shown in Figures 11 and 12, covering threads in the lateral direction
d) Manufacture a pair of tights from two stockings 25 and 26 in a single operation by forming two rows of double stitches at the same time, connecting the stitches to each other by means of 29 and by means of a filler thread 28 in the upper part of the knitted fabric; do. The covering thread 29 is fed by the hook 16, lea, and the cover thread 28 is fed by the hook 12.12a. In FIG. 1, two pairs of needles 9 are shown at the location indicated by the reference numeral 27b.
and 9a show a bobbin that supports the thread 27 supplied.

From the above description, the operation of the suturing device according to the invention will be clear to those skilled in the art. The movement of the needle and hook is adjusted by means known in the art and will not be described in further detail.

The rotation of the crankshaft 6d causes a longitudinal reciprocating movement of the block 8 along the guiding vertical axis 8f via the rod 6, which results in a similar reciprocating movement of the needle 9.9a and the blade 11. At the same time, the rod 14 causes the block 12 to
A reciprocating motion of c occurs, and a corresponding rotational reciprocating motion of the hooks 12 and 12a. In synchronization with this, axis 1
Hooks 16 and 18a fixed to 7 also reciprocate with a certain amount of rotation.

FIG. 10 shows, in a greatly enlarged dimension, the stitches formed along the cut ends 25a and 28a of the tubular knit according to the invention. Figure 9 shows how the stitches are formed.
The rows of stitches are shown spaced apart. In addition, in FIG. 9, the knitted fabric to be sewn together is shown in a folded state in order to show the shape of the stitches on both sides of the knitted fabric. As shown in FIG. 9, the lower hook 16 and IEla are
They move simultaneously in a substantially elliptical motion in the direction of the arrow A, as shown in FIG. The covering yarn 28 is supplied by the hook 16 and the lea and is located only on the underside of the tubular knit. In practice, the needles 9 and 9a, together with the lower hooks 16 and lea,
Four parallel rows of stitches are formed and these rows are sewn together in pairs by covering threads 29 on the underside of the tubular knitted fabric. The stitches formed by threads 27a and 29 shown in FIG. 9 and the method of forming them with the apparatus of the invention will be apparent to those skilled in the art. The stitch used here is similar in some respects to buttonholing.

At the same time, the upper hooks 12 and 12a supply the thread that becomes the backing thread 28a and connect the loop of thread 27 with the thread 28 on the upper surface of the tubular knitted fabric, acting together in the same way as the hooks 16 and lea. The thread 2B does not form part of the stitch, but forms a flat open loop that serves to finish the top of the cut ends 25a and 26 of the tubular knitted fabric, as shown in FIGS. 9 and 10. It simply stretches out in a twisting manner between two rows of stitches that overlap. Synchronized with the movement of these hooks, the needles 9 and 9a reciprocate with the blade 11 perpendicular to the tubular fabric between the arms 2.3, so that the six pairs of needles 9 and 9a are connected to the covering thread 29. Two rows of stitches 31 and 31a are formed which are joined in the transverse direction by the second guard thread. Since each of the two rows of stitches 31 and 31a are stitched along each row edge of the tubular knit, the actual portion of the stitches with respect to the ends of the knit are not shown in FIG.
This is shown in FIG. 10, and in FIG. 1θ, one row of stitches in each row is stitched efficiently to both sides of the cut portion 32, finishing both ends of the cut portion and preventing loosening of the knitting threads. This is to ensure that no time will arise.

6, 7 and 8, the stages of operation when using the device according to the invention are shown. After inserting the connecting tubular knitted fabrics, ie, the stitched cut parts 25a and 28a of the stockings, between the arms 2 and 3, the device is started, and the needle 9 is inserted at the position corresponding to the crotch of the finished tights. and 9a to form the first few stitches as shown in FIG. The blade 11 also has a needle 9
．． The vertical movement is started in synchronization with 9a, but the blade 1
1 is located upstream of needles 9 and 9a, so that the knitting continues until the needles finish several stitches in the non-cutting part of the tubular knitted fabric, where the two double rows are connected to each other, as shown in FIG. The cutting part does not reach the button position. It is important that these two overlapping rows of stitches are connected to each other. This is because it prevents run lines from forming in the crotch of the finished pantyhose.

When the suturing device according to the present invention is started, the feed blade 22 moves in the direction of arrow B in FIGS. 6, 7 and 8, i.e. from the crotch area where the suturing begins, to the tubular knitted fabric corresponding to the waist area of the finished pantyhose. Begin feeding the knitted fabric so that the seams are sewn towards the open end. During stitching, the blade 11 cuts ahead of the needle at a position between two overlapping stitches. When the cut formed by the blade 11 reaches the needle 9.9a, two overlapping rows of stitches 3I, 31a follow along each cut edge of the cut. The notches 32 and gaps between the plurality of buttons are shown in FIGS. 7 and 8.
The figure is exaggerated for clarity.

The suturing device according to the invention finishes the seam consisting of two overlapping rows of stitches 31, 31a by removing the open end of the tubular knitted fabric from the arm, as shown in FIG.

In this way, two tubular knitted fabrics are cut and sewn together in a single operation. The cut edges are sewn to prevent fraying or unraveling, and the crotch of the finished product is reinforced by connecting two seams at this point, so the running line starting from this point is can be prevented from forming.

As detailed above, according to the suturing device according to the present invention, two
The operation of cutting and joining two tubular stockings to form a pair of high-quality tights can be performed quickly and conveniently, and even an unskilled machine operator can operate the device according to the invention. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of a suturing device according to the present invention. FIG. 2 is an enlarged exploded perspective view of a portion of the suturing device shown in FIG. 1, showing a portion of the mechanism for operating the needle. Figures 3, 4 and 5 are perspective views showing three successive stages during the manufacture of a pair of tights. FIGS. 6, 7, and 8 are schematic diagrams showing how the seams of a pair of tights are formed using the suturing device shown in FIG. 1. FIG. 9 is an enlarged perspective view showing stitches formed by the suturing device according to the present invention. 10th
The figure is an enlarged perspective view schematically showing how stitches are formed in the crotch part of a pair of tights using the suturing device of the present invention. FIG. 11 is an enlarged perspective view showing details of the stitch shown in FIG. 1O. FIG. 12 is an explanatory diagram schematically showing how stitches are formed by the suturing device of the present invention. 13, 14 and 15 are exploded perspective views of some of the components of the mechanism shown in FIG. 2. FIG. 16 and 17 are partial longitudinal and cross-sectional views of the upper arm of the uninvented suturing device, showing the mechanism for transmitting motion applied to the needle to the corresponding hook; FIG. . FIG. 18 is a cross-sectional view taken along line 18--18 of FIG. 16. FIG. 1θ is a polished surface view of the workpiece support plate of the suturing device of the present invention. FIG. 20 shows a schematic perspective view of a pair of tights formed using the suturing device of the present invention. ■...Self-supporting structure, 2-3...φ arm, 9 m 9
a* *e Needle, 11---Blade, 12/12a/16
φ16alI...Hook, 25/26φ stocking patent applicant Sauwiio Echi, Sochetape Jshi Acioni Agent Patent Attorney Yamaki Yuki
Three (one idiot) ■-

Claims (1)

Claims: 1) a fixed support structure, two substantially horizontal parallel arms projecting from the support structure, one over the other; two pairs of needles that sew together two stitches of knitted fabric placed between the arms by reciprocating and separating the needles from the other arm; , and a mechanism for making incisions in the knitted fabric between these, which is positioned in front of the needles with respect to the direction of movement of the knitted fabric, and one pair of needles forms the other pair in the direction of movement of the knitted fabric. offset from the needles, the first needle of each of the two pairs of needles being positioned substantially in line with the device for cutting the fiber between two seams in the direction of fiber travel; There are two types of hooks, one in which the first needle of each pair is inserted into a notch formed in the knitted fabric, and one in which the first needle of each pair of needles is inserted into a notch formed in the knitted fabric. The hook is supported by the other arm and the other pair of hooks is supported by the other arm, a mechanism for supplying yarn to the pair of needles and hooks, and a mechanism for providing synchronized movement to the needles and hooks; Usually called tights, it is possible to form one pair of tights from two tubular knitted fabrics by forming two double rows of stitches on the two tubular knitted fabrics in a single operation while leaving a cut between the knitted fabrics. Two tubular knit suturing devices for producing pantyhose stockings consisting of two tubular stockings connected to each other at their open ends. 2) The device according to claim 1, wherein the length of the arm is at least equal to the length of the seam from the crotch to the waist of a pair of tights. 3) The upper arm holds the mechanism for making incisions in the knitted fabric to be sewn, the two pairs of needles, and the upper pair of the two pairs of hooks; ,
A device as claimed in either claim 1 or 2 for retaining the lower pair of the two pairs of hooks. 4) Each pair of said two pairs of needles works in conjunction with a corresponding lower hook to produce a double row of stitches of two threads passing through said knitted fabric and forming a loop on its underside. forming the loop, the loop intertwines with a covering yarn on the underside of the knitted fabric, and the covering yarn extends laterally between the loops of two threads of the corresponding overlapping row of stitches. Apparatus as described in paragraph 3. 5) The needle also cooperates with the upper one of the two pairs of hooks to intertwine the two thread loops passing through the knitted fabric with the filler thread on the upper surface of the knitted fabric. Equipment described in.