KR20210044869A - Sewing machine and cord cutting device that can seal the cord material - Google Patents

Abstract

The cord guide body 20 is attached to the lower end of the lifting member (the lifting rod 12), and by moving the lifting member up and down in synchronization with the lockstitching operation, the cord member C through the cord guide body 20 Guide to the sinking position, and sew the cord material to the material to be sealed. The cord cutting device 40 has a cutter unit 50 and is disposed at a predetermined retracting position during the lockstitching operation, and is moved to a position for cutting the cord material after finishing the stitching of the cord material. In order to variably adjust the height of the cutter unit 50 when cutting the cord material, a height adjustment device is provided. The height adjustment device lowers the lifting member to a height set according to the height of the sewn cord material, and presses the cutter unit 50 downward by the cord guide 20 at the lower end of the lifting member. Adjust the height of the unit 50. Thereby, the cord material can be cut automatically at an arbitrary height according to the height of the sewn cord material.

Description

Sewing machine and cord cutting device that can seal the cord material

The present invention relates to a sewing machine capable of sealing a cord material to a material to be sealed. In particular, it relates to a sewing machine provided with a cord cutting device that automatically cuts the cord material after the stitching is finished.

BACKGROUND OF THE INVENTION [0002] Various embroidery sewing machines capable of sealing a decorative cord material to a material to be sewn (a work piece such as fabric) have been conventionally known. For example, in the embroidery sewing machine disclosed in Patent Document 1 below, a needle rod case provided with a plurality of needle rods is provided, and any one of the plurality of needle rods is movable as the needle rod case slides in the left and right direction. ) Is configured to be selected at a position, and corresponding to one or a plurality of needle rods, lifting rods that are raised and lowered by a driving source different from the driving source of the needle rods are provided, and at the lower end of each lifting rod, a cord material is set It is equipped with a cord guide for guiding to the needle location.

In the embroidery sewing machine disclosed in Patent Document 1, when sewing a desired cord material, a needle rod provided with a lifting rod guiding the desired cord material is selected to be set in a movable position, and a needle rod and a needle set at the movable position are selected. In synchronization with the lockstitching operation by ), the cord material is discharged by raising and lowering the corresponding lifting rod, and the cord material guided to the sinking position is sewn onto the material to be sewn (cloth). By changing the lifting stroke of the lifting rod, the amount (length) of the cord material discharged from one lockstitching operation is adjusted, and by this, the optimal amount (length) according to the shape of the stitching of the cord material to the material to be sewn (fabric) is finished. ) Can be exported. In this case, the change of the lifting stroke of the lifting rod is performed by variably adjusting the height of the top dead center in the lifting stroke during the lockstitch operation. That is, the height of the bottom dead center in the lifting stroke during the lockstitching operation is set to a certain lowest position according to the thickness of the cord material to be sewn to ensure the lockstitching of the cord material, while the height of the top dead center is variablely adjusted to increase the length of the lifting stroke. And variably adjust the amount (length) of the cord material discharged (or withdrawn) in one lockstitching operation.

For example, by making the elevating stroke length of the elevating rod zero, ``cord lockstitching'' can be performed in which the cord member is attached flat along the top of the material to be sealed, while the elevating rod is larger than zero. By raising and lowering the stroke by the stroke length, "loop lock-stitching" can be performed in which the cord material is made into a loop shape and is sealed to the material to be sealed. Further, it is also possible to form a three-dimensional cord pattern by overlapping and stitching the cord members while changing the lifting stroke of the lifting rod.

Further, according to the embroidery sewing machine disclosed in Patent Document 1, by sliding the needle rod case while sewing a series of cord embroidery patterns to switch the needle rod (and the lifting rod) used at a predetermined movable position, It is possible to stitch many kinds of cord materials having different materials, colors, thicknesses, etc. into the series of cord embroidery patterns, optionally and with different feed amounts as necessary. However, in the above embroidery sewing machine, when the stitching of the cord material is finished, the cord material must be manually cut near the end of the stitching. Therefore, in the middle of sewing a series of cord embroidery patterns, in order to sew many types of cord materials while switching the stitches to be used, it is necessary to cut the cord materials manually by stopping the sewing machine each time the stitching is switched. . Therefore, in addition to the time and effort required, there is a problem that production efficiency is poor. In particular, it is a tremendous work in a multi-head embroidery machine having a plurality of embroidery heads.

On the other hand, Patent Document 2 below discloses an embroidery material cutting device that automatically cuts a string-like material such as a cord material. However, in this apparatus, the height of the cutting position is constant, and the height of the cutting position cannot be displaced according to the various thicknesses of the string-like material or the height (height raised) (thickness) at the time of overlapping stitching. Therefore, in the middle of sewing a series of cord embroidery patterns, like the embroidery sewing machine disclosed in Patent Document 1, many types of cord materials are sewn selectively and at different feed amounts as necessary while switching the stitches to be used. As a result, it is not suitable for an embroidery sewing machine capable of forming a three-dimensional cord pattern. Further, in Patent Literature 2, it is considered that the automatic cutting position is uniformly set high so as to be able to cope with the change in the sublime (thickness) in the sewn cord pattern. However, if you do so, the remaining length from the end of the lockstitch to the automatic cutting end (remaining length of the fabric: the free end of the unstitched cord material on the fabric side), Length) becomes longer, so the remaining length of the cord material after this automatic cutting must be manually cut and removed.

Patent Document 1: International Publication WO2015/147118 Patent Document 2: Japanese Laid-Open Patent Publication No. Hei 4-16336

The present invention has been made in view of the points described above, and an object of the present invention is to provide a sewing machine and a cord cutting device capable of cutting a cord material at an arbitrary height.

The sewing machine according to the present invention includes a lockstitching mechanism configured to drive a sewing needle in order to lockstitch a material to be sewn, a cord guide device configured to guide the cord material to a sinking position (here, The cord material is sewn onto the material to be sealed by the lockstitching operation by the lockstitching mechanism), has a cutter unit for cutting the cord material, and is disposed at a predetermined retracted position during the lockstitching operation, and the lockstitch of the code material After completion, a cord cutting device configured to be moved to a position for cutting the cord material, and a height adjusting device for variably adjusting the height of the cutter unit when cutting the cord material.

According to the present invention, a cord cutting device having a cutter unit for cutting a cord material is provided, and a height adjusting device for variably adjusting the height of the cutter unit when cutting the cord material is provided. Thereby, it is possible to automatically cut the cord material at an arbitrary height without manual intervention. Therefore, by changing the height of the cutting position according to the thickness and fabric thickness of the cord material and the sublime (overall thickness) of the sewn cord pattern, it is always possible to cut at a height suitable for the state of the sewn cord material. And, it becomes possible to make the remaining length on the top side of the cord material after cutting to an appropriate length without excess, and a process of cutting the end of the cord material by hand after sealing becomes unnecessary.

In one embodiment, the lockstitching mechanism includes an elevating member that can be moved up and down, and the code guide device includes a cord guide body for guiding the cord material, mounted at a lower end of the elevating member, and in the lockstitching operation It is configured to guide the cord member to the sinking position through the cord guide by synchronously moving the lifting member up and down, and the height adjustment device sets the lifting member to a set height after the sewing of the cord member is finished. It is made of a configuration that descends to, and the height of the cutter unit is adjusted by pressing the cutter unit downward by the cord guide mounted at the lower end of the descending member. . According to this, since the lifting member for driving the cord guide body is also used for height adjustment of the cutter unit of the cord cutting device, the structure of the height adjustment device can be simplified.

In one embodiment, the cord-cutting device includes a moving mechanism for moving the cutter unit between the retracted position away from the moving trajectory of the stick needle and a cutting preparation position entering the moving trajectory of the stick needle. Further, the moving mechanism includes a driving source for moving the cutter unit between the retracted position and the cutting preparation position, and the driving force of the driving source is shared also for the cutting operation of the cutter unit. According to this, since the movement and cutting operation of the cutter unit are performed using a common drive source, the structure can be simplified.

A cord cut device according to the present invention is a cord cutting device used to cut a cord material after the end of the cord material in a sewing machine for stitching a cord material to a material to be sealed, and a cutter unit for cutting the code material, A moving mechanism for moving the cutter unit between a retracted position and a cutting preparation position, and a transfer mechanism for moving the cutter unit from the cutting preparation position to a cutting position below the cutting preparation position, and the cutting position It is characterized in that the cord material is cut by the cutter unit. According to this, in the cutting operation of the cord material, a two-stage control, which is once controlled to the cutting preparation position, and then to the cutting position, is performed, so that the cord material to be cut is captured at the cutting preparation position and cut It is possible to perform a highly reliable cutting operation such as cutting it at the position. In addition, because of the two-stage control, it is possible to easily change the height of the cutting position, and by changing the height of the cutting position according to the thickness of the cord material, the thickness of the fabric, and the sublime (overall thickness) of the sewn cord pattern, etc. It is possible to provide a cord cut device having a suitable configuration. Therefore, as described above, it is possible to cut the cord material at a height suitable for the state where the stitching is finished, thereby making it possible to make the remaining length on the top side of the cord material after cutting to an appropriate length with no extras, so that manual work after sealing can be performed. It contributes to bringing about the advantage that the processing of cutting the end of the cord material by this becomes unnecessary.

1 is a front view of an embroidery head of a multi-head embroidery machine according to an embodiment of the present invention.
Fig. 2 is a right side view of the embroidery head of Fig. 1;
3A and 3B are enlarged perspective views showing the attached state of the cord guide, (c) is a perspective cross-sectional view of the cord guide, and (d) is a plan view of the cord guide.
4 is an enlarged cross-sectional view of the cord guide body.
Fig. 5 is an exploded perspective view showing the main constituent parts of the cord cutting device on an enlarged scale.
6 is an enlarged plan view of the cord cutting device.
7 is a left side view of the cutter unit in a retracted position.
Fig. 8 is a left side view of the cutter unit in a cutting ready position.
9 is a perspective view showing the scalpel by extracting it.
Fig. 10 is a schematic side view illustrating a difference in height of a cutting position of a cutter unit that is variablely set according to the height (sublime) of the sewn cord pattern, and (a) is the height of the sewn cord pattern (sublime). ) Is a diagram showing an example in which) is the minimum, and (b) is a diagram showing an example in which the height (sublime) of the cord pattern is increased by loop stitching.
11 is a right side view of the cutter unit in a retracted position.
12 is a right side view of the cutter unit in a cutting ready position.
13 is a right side view of the cutter unit in a cutting position.
14 is a right side view of the cutter unit during a cutting operation.
15 is a block diagram schematically showing an electronic control system provided in an embroidery sewing machine.
Fig. 16 is an enlarged side view showing the standby position of the cord guide body at the time of thread cutting.
17 is a flow chart showing an embodiment of a fully automatic processing of an operation related to code embroidery.
18 is a perspective view showing a modified example of the first moving body, the second moving body, and the cutting device in the cutter unit.

Hereinafter, as an embodiment of the sewing machine according to the present invention, an embodiment in which the present invention is applied to a multi-head embroidery machine will be described. However, the present invention is not limited to an embroidery sewing machine, and can also be applied to an ordinary lockstitch sewing machine.

1 is a front view of one embroidery head (machine head) 1 of a multi-head embroidery machine, and FIG. 2 is a right side view of this embroidery head 1. On the front surface of the sewing machine arm 3 attached to the front of the main body frame 2, the needle stick case 4 is supported so as to be slidable in the left-right direction. The needle rod case 4 is provided with a plurality of needle rods 5 (refer to Fig. 3A) so as to be vertically movable. Each needle rod 5 is arranged so that the axial direction extends in the vertical direction (vertical direction), and a needle needle 6 is attached to each lower end. The needle rod case 4 is provided with a slide shaft 7 penetrating therethrough, and by sliding the slide shaft 7 in the transverse direction (left and right direction viewed from the front) by motor driving, the needle rod case 4 Slides into. Depending on the slide position of the needle rod case 4, any one of the plurality of needle rods 5 is positioned at a predetermined movable position, thereby selecting one needle rod 5 to be movable. A well-known lower yarn shuttle (not shown) is provided below this predetermined movable position. This lower thread kiln is arranged below the sewing machine table 10, and the needle plate 11 covers the upper side of the kiln. The needle plate 11 is provided with an invasion through which the needle needle 6 of the selected needle rod 5 can be inserted.

The main shaft 8 is mounted through the sewing machine arm 3, and when the main shaft 8 is rotated by a main shaft motor (first drive source) (not shown), the rotation of the main shaft 8 is not shown in the sewing machine arm 3. The needle rod drive body 9 moves up and down through a non-removable cam mechanism or the like. The needle rod 5 selected at the movable position is caught by the needle rod drive body 9 and moves up and down along the axial direction by the vertical motion of the needle rod drive body 9. When the needle rod 5 (the needle needle 6 at its tip) selected at the movable position moves up and down, a known lockstitching operation is performed.

As shown in FIG. 2, in the needle rod case 4, a lifting rod (elevating member) 12 is provided so as to move up and down from the rear of each needle rod 5, respectively. Like the needle rod 5, the lifting rod 12 is arranged so that its axial direction extends in the vertical direction (vertical direction). This lifting bar 12 is driven by a motor 13 (second drive source) fixed to the sewing machine arm 3. A link mechanism (not shown) is linked to the motor 13, and when the motor 13 is reciprocally driven to rotate, the cloth pressing drive 14 provided so as to be able to move up and down relative to the sewing machine arm 3 is Ascending and descending via medium And, of the plurality of lifting rods 12 provided in the needle rod case 4, the lifting rod (elevating member) 12 corresponding to the needle rod 5 selected at the movable position was caught by the cloth pressing drive 14 Then, by the lifting motion of the cloth pressing drive 14, it moves up and down along the axial direction. Further, as well known, a sensor for detecting its driving position is appropriately provided in relation to the motor 13, and this sensor output is used for motor drive control.

At the lower end of each of the plurality of lifting bars 12, a cloth pressing body 15 or a cord guide body 20 is attached. The fabric presser 15 is made of a well-known structure for pressing the material to be sewn from the top when performing a normal embroidery lockstitch, and a lifting rod corresponding to the needle rod 5 used for performing a normal embroidery lockstitch. It is mounted at the bottom of 12. On the other hand, the cord guide 20 is for guiding the cord material C on the material to be sealed, and for pressing the cord material C on the material to be sealed from the top when stitching the cord material C. It is attached to the lower end of the lifting bar 12 corresponding to the needle bar 5 used to perform the code material lockstitching operation. As a simple example, in Fig. 1, 12 needle rods 5 are provided in one needle rod case 4, and a cord guide body at the lower end of the lifting rod 12 corresponding to the six needle rods 5 in the center portion Each 20 is mounted, and a cloth pressing body 15 is mounted at the lower end of the lifting rod 12 corresponding to each of the three needle rods 5 in the left and right portions. This means that, in one embroidery head (1), it is possible to selectively sew a cord material by six different types of cord material (C), or to have an optional normal stitching by using six different types (color) upper threads. It means that the operation is possible. In addition, as shown in Fig. 2, from the lower side of the sewing machine arm 3, on the rear side of the vertical movement path of the needle needle 6, an upper thread hook 16 for fastening the upper thread after cutting, and the upper thread hook 16 An upper thread holder 17 for holding the upper thread hung by is provided.

Each member and/or each device and/or a combination of each device for a lockstitching operation provided in the embroidery head 1 having the configuration as described above drives the stitching needle 6 to perform a lockstitching on the material to be sealed. It is equivalent to a lockstitching device configured to do so. In addition, the combination of the lifting rod 12 and the cord guide 20 corresponds to the cord guide device 21 for guiding the cord member C to the sinking position, and the cord member guided to the sinking position ( C) is sewn onto this material to be sewn by the lockstitching operation by the stitching needle 6 in the lockstitching mechanism.

[Code guide]

Next, a detailed example of the cord guide body 20 will be described with reference to FIG. 3. 3A is an enlarged perspective view of the cord guide body 20 as viewed from an inclined right front direction. As shown in FIG. 3A, the cord guide 20 is attached to the lower end of the lifting bar 12 via the mounting member 18. The mounting member 18 has a mounting portion 18a protruding forward at its lower end, and the main body of the cord guide body 20 is detachably fixed to this mounting portion 18a by screws 19. . Further, at the lower end of the mounting member 18, a push-down portion 18b protruding to the left and extending downward is provided. The lowering portion 18b functions to press down the cutter unit 50 to be described later to the cutting position. In addition, FIG. 3(b) is an enlarged perspective view of the cord guide body 20 as seen from an oblique left front direction in order to specify the push-down part 18b.

The main body portion of the cord guide 20 is provided with a cup-shaped pressing portion 20a disposed at a lower position of the needle rod 5. As shown in the perspective cross-sectional view of Fig. 3(c) and the plan view of Fig. 3(d), the rod needle 6 is allowed to pass through the bottom surface of the pressing part (body part) 20a, and the cord material C A lead-out hole 20b is formed as an opening for guiding) onto the material to be sealed. In addition, a supply port 20c for guiding the cord member C to the lead-out hole 20b is formed in a wall portion approximately in the front of the pressing portion 20a. As shown in Fig. 3(d), the lead-out hole 20b has a substantially water-drop shape whose tip is narrowed toward the supply port 20c. In other words, the lead-out hole 20b is formed of an opening portion (a water droplet-shaped root periphery) and an opening portion other than that. In addition, the sinking position in the lead-out hole 20b (the position through which the rod needle 6 passes) is approximately the center of the bottom surface of the pressing portion 20a, and is located in the leading opening portion (periphery of the water drop-shaped root). . With such a line shape, a regulation structure for restricting the movement of the cord member C in the left-right direction at the sinking position in the lead-out hole 20b is integrally formed. In the supply port 20c of the wall portion, a cylindrical portion 20e for guiding the cord member C into the pressing portion 20a extends horizontally toward the front (direction of the front of the machine), and a cord An inlet 20d of ash (C) is provided. In this way, each cord guide body 20 is mounted on the lower end of the corresponding lifting rod 12, and also allows the passage of the pressing portion 20a for pressing the material to be sealed and the rod needle 6, and It has an opening (lead hole 20b) for guiding the cord material C onto this material to be sealed. In addition, the cord guide body 20 is not limited to the aspect in which the main body and the mounting member 18 can be separated as shown, and the main body and the mounting member 18 may be integrally formed. . Therefore, in the present invention, the "cord guide 20" is a concept including the mounting member 18 (in particular, the push-down portion 18b). In other words, the pressing portion 18b that functions to push down the cutter unit 50 to the cutting position may be included on the main body side of the cord guide body 20.

In this way, the lead-out hole 20b of the cord guide body 20 according to the present embodiment has a narrow tip near the cylindrical portion 20e (that is, the inlet port 20d or the supply port 20c). It consists of an opening part (periphery of a water-drop-shaped root) and an opening part other than that. By the line shape oriented toward the tubular portion 20e (that is, the inlet port 20d or the supply port 20c), a specific code material stitching direction (in this embodiment, the direction of the tubular portion 20e, In other words, it is possible to prevent a lockstitch miss (seamless spillage) depending on the front).

This point will be described with reference to FIG. 4. Fig. 4 is an enlarged cross-sectional view of the cord guide body 20, showing an example of ``cord lockstitch'' in which lockstitching is finished by moving the embroidery frame (i.e., the material to be sealed W) toward the front of the sewing machine. . When the embroidery frame is sewn in the direction of the tubular portion 20e, that is, moving forward, the direction of the cord material C above and below the lead-out hole 20b is the tubular portion 20e (that is, the introduction port ( 20d) or the direction of the upper side toward the supply port (20c)) and the direction of the lower side connected to the stitched cord part are the same, and the cord material (C) is bent at the location of the lead-out hole (20b). . As indicated by the dashed-dotted line, the portion near the outside of the bent point of the cord member C corresponds to the sinking position, and this is the stitching point. Thereby, in the cord material C sewn onto the material to be sealed W, a cord material having a good appearance is performed in which the stitched portion is hidden on the back side. In addition, when the bongchim 6 moves upward, pull occurs in the portion of the upper thread (U) connected to the final stitching point of the cord material (C) on the material to be sealed (W) from the invasion of the bongchim (6), Even if the bent portion of the cord member C is pressed by the pulling portion of the upper thread U, the hole in the bottom portion of the body portion (leaving hole 20b) has a regulation structure provided near the supply port 20c. Since the branch includes an opening portion, the bent portion of the cord member C is regulated by this regulation structure so that it does not move easily. In addition, as in the example shown in Fig. 4, the portion of the upper thread U that has been pulled out of the sinking position does not adversely affect the stitching portion (a portion near the outer side of the bent portion) of the cord material C. .

Here, if the lead-out hole (20b) of the cord guide body (20) is a round shape, when the bent portion (outer side) of the cord member (C) is pressed by the pulling portion of the upper thread, the cord member (C) is Depending on the arc of the lead-out hole, it is easy to move left and right, and it is shifted from the sinking position, which causes a lockstitch mismatch (seamless spillage). On the other hand, as in the present embodiment, if the lead-out hole 20b has a substantially water-drop shape whose tip is narrow toward the cylindrical portion 20e, the supply port 20c at the rear end of the cylindrical portion 20e Part of the cord material (C) that is bent into the lead-out hole (20b) is regulated from both sides in the pre-opening portion (periphery of the water droplet shape), and the cord material (C) does not move in the lead-out hole (20b). It does not become, and does not deviate from the sinking position. In addition, since the sinking position comes into the lead opening portion of the lead-out hole 20b, the cord material C regulated in the lead opening portion is always located in the sinking position, so that a lockstitch mismatch (sewing slippage) does not occur.

In the cord guide body 20 to which the role of guiding the cord material C to the sinking position is imposed, the lead-out hole 20b is provided to facilitate passage of the cord material C, which is relatively thick compared to the rod needle 6 While it is somehow necessary to sufficiently take the opening area of the hole, if so, the place where the cord guide body 20 is located in the lead-out hole 20b becomes unstable, resulting in a lockstitch mismatch as described above. There is a problem that is said to happen. However, as in this embodiment, by devising the opening shape of the lead-out hole 20b, that is, the shape of the opening of the lead-out hole 20b toward the introduction port 20d (cylindrical portion 20e). Such a problem can be solved by setting (that is, arranging a regulatory structure, that is, a leading opening portion near the tubular portion 20e).

In addition, the opening shape of the lead-out hole 20b is not limited to a line shape such as a substantially water drop shape, and may be any other line shape, and is not limited to a strict line shape, and the entire area of the opening is the cord material (C). While making it wide enough to facilitate the passage of the air, an appropriate regulation structure (small size opening portion) is formed around the sinking position, and this regulation structure (small size opening portion) is better than that of other opening portions. Any shape set in the vicinity of the supply port 20c or the introduction port 20d (that is, the cylindrical portion 20e) may be used. For example, the opening shape of the lead-out hole 20b is a combination of an introduction port (for example, a small diameter circle) and a large opening (for example, a large opening). It may be in a shape such as a snowman or gourd made, and the introduction port portion becomes a sinking position, and may be a shape that is closer to the supply port 20c or the introduction port 20d (i.e., the tubular portion 20e), Also by this, the same effect as described above can be obtained. Further, as a modified example of the cord guide body 20, although it has the characteristic of the lead-out hole 20b having a unique opening shape as described above, it may be configured not to have the characteristic of the cylindrical portion 20e. In that case, the cord material C supplied from the upper side can be directly introduced through the supply port 20c provided on the side wall surface of the main body 20a.

[Code supply system]

Next, the cord supply system 22 for supplying the cord material C to the cord guide device 21, that is, the cord guide body 20 will be described. As shown in Figs. 1 and 2, mounting brackets are respectively fixed to the left and right of the adjustment base 30 provided above the needlestick case 4 in a substantially inverted L-shape when viewed from the side. Each of the mounting brackets is composed of first brackets 23a and 23b having a long length toward the upper side, and second brackets 24a and 24b protruding toward the inclined front side. Each second bracket (24a, 24b) is pivotally supported by a screw (24c), and by changing the fixing position of the screw (24d), the mounting angle to the corresponding first bracket (23a, 23b) It is made to be adjustable. Each second bracket (24a, 24b) has a shape with the upper side protruding largely toward the front and the lower side protruding slightly toward the front, and between the upper and lower ends of the left and right second brackets 24a and 24b. Support plates (top/bottom) 25, 26 are strung. The bobbin (cord material storage portion) 27 in which the cord member C is wound is rotatably supported by a pin 28 erected on the support plates 25 and 26.

A holding plate 29 for attaching a flexible tube 31 (for example, a spiral tube) through which the cord member C passes is strung at the lower end between the left and right first brackets 23a and 23b. In addition, a support bar 33 is hung between the brackets 32a and 32b fixed to the left and right sides of the case 4 in the lower front of the needle rod case 4, and the holding plate 34 is attached to the support bar 33. It is fixed. Each of the upper and lower holding plates 29 and 34 is provided with a plurality of tube connecting ports 35 and 36 corresponding to the individual needle rods 5 provided with the cord guide 20. Then, the upper and lower ends of the tubes 31 for preventing the cord material C from interfering with each other are connected to the tube connection ports 35 and 36 of each of the holding plates 29 and 34, respectively. In this way, as shown in Fig. 1, each tube 31 is provided extending in the vertical direction from the front side of the embroidery head (machine head) 1, and a plurality of tubes 31 (Sewing Head) It is arranged in parallel on the front surface of (1).

A flexible resistance member 37 is disposed in the vicinity of the tube connection port 35 on the upper holding plate 29 (above the rectus muscle). The resistance member 37 is to prevent the cord member C, which has been excessively drawn out (continuously taken out), such as when the cord member C is strongly drawn out, from loosening near the tip of the tip, Rather, it is intended to loosen at the point of the resistance member 37 just before it. The flexible resistance member 37 is provided with fluff-like fibers (or flexible brushes, etc.), and gives some resistance to the cord material (C) by bringing the fluff-like fibers into contact with the supplied cord material (C). do. Therefore, when the cord material C is pulled out strongly, the cord material C is excessively fed from the bobbin 27 due to the force, but the cord material C is removed at the location of the resistance member 37 to which resistance is applied. As the movement becomes weaker, the cord member C that has been excessively fed out is loosened near the upper part of the rectus muscle of the resistance member 37. In this way, it is possible to prevent the cord member C from being loosened in the vicinity of the tip of the terminal.

In addition, one guide frame 38 is provided corresponding to the plurality of bobbins 27 on the upper side, and a plurality of guide frames 39 are provided individually corresponding to the plurality of bobbins 27 on the lower side. In each guide frame 39 on the lower end side, one small loop 39a is formed, and a large loop 39b is formed by the remaining portion. The cord material C taken out from the upper bobbin 27 passes through the inside of the upper guide frame 38, and then passes through the small loop 39a of the lower guide frame 39, It also passes through the corresponding tube 31, and passes through the inlet 20d (FIG. 3) of the corresponding cord guide body 20. As shown in FIG. On the other hand, the cord material C drawn out from the lower bobbin 27 passes through the large loop 39b of the guide frame 39 at the lower end, and also passes through the corresponding tube 31, It passes through the inlet 20d (FIG. 3) of the cord guide body 20. In this way, the cord material C drawn out from the bobbin 27 is almost unbent, drooped, and smoothly introduced into the cord guide body 20. In the cord guide body 20 shown in FIG. 3, the cord material C introduced from the introduction port 20d passes through the cylindrical portion 20e and exits, and a cup-shaped pressing portion from the supply port 20c. It enters into the interior of (20a), and exits the lead-out hole (20b) of the bottom part of this pressing part (20a) downward, and is taken out of the cord guide body (20).

In addition, the small loop (39a) and the large loop (39b) provided in the guide frame (39) on the lower side are fed from the cord material (C) fed out from the bobbin (27) on the upper side and the bobbin (27) on the lower side. It functions to properly distribute and guide the code members C so that they do not interfere with each other. In addition, in FIG. 1, for ease of viewing, only one cord material C drawn out from one bobbin 27 is shown, and the illustration is omitted for the other cord material C drawn out from the other bobbin 27. have. In the actual sewing machine operation state, the one or more cord members C fed out from the one or more bobbins 27 required are guided to the corresponding cord guides 20 respectively through the corresponding tubes 31. Each guide frame 39 on the lower side, which has a guide frame 38 on the upper side and a small loop 39a and a large loop 39b, respectively, is fed out from each bobbin (cord material storage unit) 27. In a state where the cord member C is introduced into the upper end of the corresponding tube 31, it functions as a guide frame for guiding each cord member so that the cord members do not interfere with each other.

According to the cord supply system 22 as described above, as shown in Fig. 2, the supply source (bobbin 27) of the cord material C is disposed above the embroidery head (sewing head) 1, and this supply source The cord material C from the (bobbin 27) is transferred from the top to the bottom in the front of the embroidery head (machine head) 1 in an almost straight line without changing direction. It is supplied to the guide body (20). And, in the cord guide body 20, the cord member C introduced from the front end (introduction port 20d) of the cylindrical portion 20e extending forward and drawn out from the rear end (supply port 20c) Is guided to the sinking position of the lead-out hole 20b, so that a large direction change or bend is not performed in the cord member C. Therefore, by smoothly supplying the cord member C from the supply source to the needle source position without being bent largely from the front, the load associated with the cord member C is eliminated, and the cord member C is Can be guided reliably to the exit hole (settlement position). In this way, for example, in the case of performing "loop stitching" of the cord material C to be described later, stable, sublime (height) and homogeneous "loop stitching" can be performed.

In addition, the cord guide body 20 includes a tubular portion 20e extending forward, and the cord member C is introduced from the front end (introduction port 20d) of the tubular portion 20e. Since the structure is led out from the rear end (supply port 20c) and reaches the lead-out hole 20b (settlement position), the inlet port 20d of the cord material C is separated from the lead-out hole 20b (settlement position). have. Thereby, the inlet 20d of the cord guide body 20 is suitably separated from the moving line of the vertical movement of the rod needle 6, and the cord material above the inlet 20d of the cord guide body 20 The part (C) does not interfere with the stitching operation of the cord material, etc., and various problems described below are solved.

The portion of the cord material (C) on the supply side (the cord material (C) lowered from the tube 31 before entering the cord guide body 20) at the time of the lockstitching operation of the cord material. Although this shakes, there is no fear that the part of the cord member C on the supply side which shakes crosses the moving line of the vertical movement of the rod needle 6. Therefore, there is no problem that the part of the cord member C on the supply side which is swayed is erroneously stitched by the stitching needle 6.

Since the portion of the cord material (C) on the supply side near the inlet (20d) of the cord guide body (20) and the portion of the cord material (C) sewn at the sinking position are appropriately spaced apart, the cord material (C) is fluffed. Even if it is made of a material with this, there is no fear of lump formation. If the tubular portion 20e is not provided in the cord guide body 20, the distance between the cord material portion on the supply side near the inlet of the cord guide body 20 and the cord material portion sewn at the sinking position is relatively close. When the lower part of the cord material entering the inlet port comes into contact with the part of the cord material sewn into the fabric, the fluff is entangled and supplied to the inlet port, and the ring passes through the inlet port and the lead-out hole while continuing to be sewn. In addition to being adhered to the pressing portion of the cord guide body as a lump of fluff in the shape, there is a fear that the lead-out hole may be blocked when the lump of fluff becomes large. However, as in the present embodiment, by providing the cylindrical portion 20e extending forward from the cord guide 20, the portion of the cord member C on the supply side and the lead-out hole entering the inlet 20d There is no fear that the portion of the cord material C coming out of (20b) and sewn into the fabric will come into contact with each other, and therefore, there is no fear that a fluff lump will occur.

[Summary of stitching operation of cord material]

As a specific method for activating the cord guide device 21 according to the present embodiment to perform the stitching (code embroidery) operation of the cord material, a known cord embroidery technique may be appropriately applied. For example, the code embroidery technique disclosed in Patent Document 1 can be preferably applied to this embodiment as well. For example, in the case of stitching the desired cord material (C), the needle rod 5 corresponding to the lifting rod 12 on which the cord guide 20 for guiding the desired cord material (C) is mounted is movable position Select the slide position of the needlestick case 4 so that it is set on. And, in synchronization with the lockstitching operation by the needle rod 5 and the needle needle 6 set at this movable position, the cord member C is sent out by raising and lowering the corresponding lifting rod 12, and the cord member guided to the sinking position. (C) is sewn onto the material to be sealed (fabric). By changing the lifting stroke of the lifting rod 12, the amount (length) of the cord material C transmitted in one lockstitch operation is adjusted, thereby The cord material (C) of the optimal amount (length) according to the shape of the stitching is sent out. The lifting stroke of the lifting rod 12 is adjusted by control of the motor 13 (second drive source). Any code material stitching pattern (code embroidery pattern) can be selected, and according to the selected code material stitching pattern (code embroidery pattern), XY driving of the embroidery frame for each stitch is performed as known in the art. Control of the lockstitching style of the cord material (such as ``stitching code'' or ``stitching loops'' described above) based on variable control of the lifting stroke of the following lifting rod 12 is performed, and in this way, the lockstitching operation of the cord material (code embroidery operation) This is going on.

When embroidering the cord, the position of the lower dead center of the cord guide 20 and the lifting stroke amount of the lifting rod 12 are set in advance on the operation panel for each embroidery step. The bottom dead center can be set to a position within a predetermined range in accordance with the thickness of the cord material C to be sewn and the thickness of the material to be sealed (fabric). The lifting stroke amount can also be set within a predetermined range. For example, when the lifting stroke amount is set to zero, the cord guide body 20, that is, the lifting rod 12 does not move the stroke, so that the cord guide body 20 remains positioned at the bottom dead center. While the material C is pressed on the material to be sealed by the bottom surface of the pressing portion 20a of the cord guide 20, a known "cord lock-stitching quality" proceeds. If the lifting stroke amount is set to an arbitrary value (arbitrary height from the bottom dead center = top dead center point), the cord guide body 20 moves from the bottom dead center to the set top dead center in synchronization for each stroke of the needle rod 5 By making a stroke, a well-known "loop stitching" is performed. Further, it is also possible to form a three-dimensional cord pattern by overlapping and stitching the cord members C while changing the lifting stroke amount of the lifting rod 12. In the present embodiment, when the stitching of the cord material is finished, the cord material C is automatically cut in the vicinity of the stitching end position by the operation of the cord cutting device 40 described below.

[Cord cut device]

As shown in FIG. 2, a cord cut device 40 is provided below the sewing machine arm 3, and the cord cut device 40 is detachably attached to the sewing machine arm 3. The cord cutting device 40 has a cutter unit 50 for cutting the cord material C, and is disposed at a predetermined retracting position during the lockstitching operation, and after the lockstitching of the cord material C is finished, the cord material It is configured to be moved to the position for cutting (C). In addition, FIG. 2 shows a state in which the cord cutting device 40 is disposed in the retracted position. In addition, the retracting position is a position away from the movement trajectory (up and down movement path) of the stick needle 6, and is a position where the cord cutting device 40 does not interfere with the lockstitch operation by the stick needle 6. Preferably, the cord cutting device 40 further includes a moving mechanism for moving the cutter unit 50 between the retracted position and a cutting preparation position entering the moving trajectory of the rod needle 6.

First, the support (mounting) structure of the cord cutting device 40 in the sewing machine arm 3 will be described with reference to FIGS. 1, 2 and 5. 5 is an exploded perspective view showing the main constituent parts of the cord cutting device 40 on an enlarged scale. The cord cutting device 40 is provided with a flat plate-shaped support (mounting) base 41 at the uppermost portion. The left and right ends of the front edge of the support base 41 are protrusions 41a and 41b, and an L-shaped bracket 42 (see Fig. 2) is fixed under each protrusion 41a and 41b with a spacer therebetween. Has been. A connection bracket (42a) is fixed on the inner side of each L-shaped bracket (42), and this connection bracket (42a) is screwed to each bracket (42b) on the sewing machine side mounted on the left and right sides of the sewing machine arm (3). By doing so, the cord cutting device 40 is attached to the sewing machine arm 3 via the support base 41.

Below each of the protrusions 41a and 41b of the support base 41, two front and rear guide rods 43 and 44 are disposed at predetermined intervals, and are guided by the linear bushes 45 and 46 to slide in the vertical direction. It penetrates as much as possible. A coil spring 47 is fitted to the guide rod 43 on the front side, and a spring seat 48 is screwed to the upper end. The lifting base 49 is hung on the lower ends of the left and right guide rods 43 and 44, and is fixed by screws from the lower surface. In this way, the support base 41 is fixed to the sewing machine arm 3, but the lifting base 49 is supported by the support base 41 so as to be able to move up and down along the guide rods 43 and 44, and the coil It is pressed upward by the spring 47. That is, the lifting base 49 resists the pressing force of the coil spring 47 and descends when a downward force is added, and rises by the restoring force of the coil spring 47 when the downward force is released.

[Moving mechanism]

Next, with reference to Figs. 5 and 6, a moving mechanism will be described. The moving mechanism is provided on the side of the cutter unit 50 in order to transmit the drive device 60 for conveying the cutter unit 50 and the conveyance motion by the driving device 60 to the cutter unit 50. It is configured by combining the required portions of the first and second moving bodies 70 and 80. The drive device 60 is fixed to the lower surface of the support base 41 via a mounting bracket 61. A part of the mounting bracket 61 is formed as a downwardly bent portion, and the drive motor 62 is fixed to the vertical surface of the bent portion. The drive motor 62 functions as a drive source for reciprocating the cutter unit 50 in the horizontal direction, and is also used as a drive source for operating a dynamic scalpel in the cutter unit 50 as a preferred example. A drive pulley 63a is provided on the rotation shaft of the drive motor 62, and a driven pulley 63b is axially supported at the front end of the mounting bracket 61, and timing between the drive pulley 63a and the driven pulley 63b Belt 64 is strung. Inside the mounting bracket 61, the guide rail 61A is fixed along the longitudinal direction (moving direction of the timing belt 64). Further, a moving body 65 is fixed to a predetermined location of the timing belt 64, and the moving body 65 is slidably fitted to the guide rail 61A inside the mounting bracket 61. Therefore, when the drive motor 62 is operated, the moving body 65 linearly reciprocates in the horizontal direction along the guide rail 61A along with the reciprocating motion of the timing belt 64.

A drive piece 66 is integrally formed in the moving body 65. The drive piece 66 is long in the vertical direction, and is engaged with four rollers up and down front and rear of the cutter unit 50 to be described later. In addition, to the moving object 65, a detection object 67 for detecting the position of the moving object 65 is fixed, and the position of the moving object 65 is fixed by an optical sensor 68 fixed to the mounting bracket 61. Is detected. As an example, when the optical sensor 68 is not blocked by one or a plurality of slits provided in the object 67, the cord cutting device 40 is located in the predetermined retracted position or the cutting preparation position. To detect.

[Cutter unit]

Next, the cutter unit 50 will be described with reference to Figs. 5 to 9 and the like. The cutter unit 50 is roughly divided into a first moving body 70, a second moving body 80, and a cutting device 90, and can be slid in a horizontal direction with respect to the lifting base 49, but in a vertical direction. Is supported by the lifting base 49 so as to be raised and lowered integrally. As shown in FIG. 5, the mounting member 51 is fixed at a predetermined position on the lifting base 49, and the horizontal direction slide guide 52 is fixed to this mounting member 51. As shown in FIG. On the other hand, in the first moving body 70 on the cutter unit 50 side, the cam base 72 and the guide rail 73 are fixed to the moving base 71 in a predetermined arrangement. This guide rail 73 is slidably fitted to the slide guide 52 on the side of the lifting base 49 in a horizontal direction (a front-rear direction with respect to the front of the machine). Further, at both ends in the longitudinal direction of the member to which the guide rail 73 is attached, bent portions 73a that abut the end portions of the slide guide 5 and restrict the slide movement are formed.

7 and 8 are left side views of the cutter unit 50, and in order to clearly show the state of the cam base 72 of the first moving body 70, the illustration of the guide rail 73 is omitted for convenience. I'm doing it. 7 shows the cutter unit 50 placed in the retracted position, and FIG. 8 shows the cutter unit 50 placed in the cutting ready position. In the figure, a hatched point shows a cross section. A cam groove 74 is formed in the cam base 72, and a cam roller 54 (refer to FIG. 2) supported by a bracket 53 fixed to the lower surface of the support base 41 is provided with the cam groove ( 74). 7 and 8, for convenience, the bracket 53 and the cam roller 54 are also shown. The cam groove 74 is an upwardly inclined portion 74a inclined toward the rear, a bent portion 74b that is bent vertically from the rear end of the inclined portion 74a, and vertically extends from the bent portion 74b. It consists of a vertical part 74c. Since the position of the cam roller 54 is fixed by the support base 41, when the first moving body 70 moves in the horizontal direction (forward and backward direction), the cam base 72 of the first moving body 70 It moves along the groove 74 in the horizontal direction (forward and backward direction) and in the vertical direction, whereby the first moving body 70 can move not only in the horizontal direction (forward and backward), but also in the vertical direction. In addition, by fitting the slide guide 52 of the lifting base 49 and the guide rail 73 of the first moving body 70, the first moving body 70 and the lifting base 49 interlock and move up and down. , The lifting base 49 does not move in the horizontal direction (front and rear direction).

Returning to FIGS. 5 and 6, a guide groove 75 is formed in the moving base 71 of the first moving body 70, and the engagement provided on the left side of the moving base 81 of the second moving body 80 The pin 81a engages this guide groove 75. Moreover, the guide shaft 76 is fixed to the upper surface of this moving base 71 in the horizontal direction (front-rear direction). The movable base 81 of the second movable body 80 penetrates through the guide shaft 76, and the second movable body 80 is slidably supported along the guide shaft 76. The posture at the time of horizontal movement (forward and backward) of the second moving body 80 along the guide shaft 76 due to the engagement (guide) at two places by the guide groove 75 and the guide shaft 76 maintain. That is, the second moving body 80 horizontally moves (forward and backward) along the guide shaft 76 while its rotation is regulated by the engagement pin 81a that fits into the guide groove 75.

On the right side of the moving base 81 of the second moving body 80, a pair of rollers 82 meshing with the driving piece 66 of the moving body 65 of the driving device 60 are provided side by side. . Further, also in the first moving body 70, on the right side of the moving base 71, a pair of rollers 77 engaged with the driving piece 66 of the moving body 65 of the driving device 60 are horizontally aligned. I have it. As shown in FIG. 5, the pair of rollers 82 on the side of the second moving body 80 is disposed above the pair of rollers 77 on the side of the first moving body 70. In the assembled state (or retracted state), as shown in FIG. 5, the position of the upper pair of rollers 82 and the lower pair of rollers 77 in the horizontal direction (front and rear direction) coincide, and the driving device The drive piece 66 of the moving body 65 of 60 is pinched between each pair of rollers. Therefore, when the moving body 65 of the driving device 60 reciprocates in the horizontal direction (forward and backward direction), the driving piece 66 presses the rollers 77 and 82 on the front side, thereby 2 The moving body 80 advances, and the first moving body 70 and the second moving body 80 retreat by pressing the rear rollers 77 and 82 by the driving piece 66. In this way, when both the rollers 77 and 82 of the first moving body 70 and the second moving body 80 are engaged with the driving piece 66, the first moving body 70 and the second moving body 80 are In this state, the cutter unit 50 is moved between the retracting position and the cutting preparation position in accordance with the drive of the drive motor 63, as will be described later. Accordingly, the combination of the driving device 60 and the first and second moving bodies 70 and 80 on the side of the cutter unit 50 moves the cutter unit 50 between the retracted position and the cutting preparation position. Functions as. In addition, as described later, when only the roller 82 of the second moving body 80 is brought into engagement with the driving piece 66 due to the lowering of the cutter unit 50, only the second moving body 80 is a driving device ( 60) can be moved.

As shown in FIG. 5, the mounting arm 78 extends downwardly inclined forward from the moving base 71 of the first moving body 70, and similarly, from the moving base 81 of the second moving body 80, The mounting arm 83 is extended downward in the photograph, and the cutting device 90 is attached to the tip ends of these mounting arms 78 and 83. The cutting device 90 includes a horizontal scalpel stand 91, a fixed scalpel (first cutter part) 92 fixed to the upper surface of the scalpel stand 91, and a fixed scalpel on the scalpel stand 91. A moving scalpel (second cutter part) 93 supported by a pin 94 so as to be able to rotate relative to 92, and provided near the upper part from the rear of the scalpel stand 91 It includes a contact member 95 and a link mechanism for moving the movable knife 93. The scalpel stand 91 is attached to the distal end of the mounting arm 78 of the first moving body 70, and moves in the horizontal direction (forward and backward direction) together with the first moving body 70 and moves up and down. The abutting member 95 is a portion where the push-down part 18b of the cord guide body 20 abuts, and the push-down part 18b of the descending cord guide body 20 abuts the abutting member 95 By touching down and pressing, the scalpel stand 91 descends, and thus, the entire cutting device 90 descends. Further, the abutting member 95 is fixed to the scalpel stand 91 in a state disposed slightly above the moving scalpel 93 so as not to interfere with the moving scalpel 93.

The link mechanism for moving the movable mes 93 includes an oscillating link 96 and a rotating link 97, and one end of the oscillating link 96 is a mounting arm 83 of the second moving body 80. ) Is connected to the tip so as to be able to swing via a shaft (connection pin) 98. The linking pin 98 is fitted with a torsion spring 100 (see FIG. 7 for example), and one end of the torsion spring 100 is caught by the mounting arm 83, and the other end is caught by the swing link 96. have. By this torsion spring 100, the swing link 96 is pressed in the lower surface direction. The other end of the swing link 96 is connected so that one end of the swing link 97 can be rotated by a shaft (linkage pin) 99. The other end of the pivot link 97 is connected to the free end of the moving mes 93 so as to be rotatable. Accordingly, when the second moving body 80 advances when the first moving body 70 is stopped, the free end of the moving mes 93 is moved forward by the link mechanism connected to the second moving body 80, When the movable sword 93 is rotated clockwise with the pin 94 as an axis, the movable sword 93 crosses the fixed sword 92 and a cutting operation is performed. Next, when the second moving body 80 retreats, the moving knife 93 rotates counterclockwise with the pin 94 as an axis, and returns to the initial position.

On the other hand, the scalpel stand 91 is provided with a catching structure (catching means) 101 for capturing the cord material C to be cut, guiding it to an appropriate holding position (holding space), and holding it. 9 is an enlarged perspective view showing the scalpel stage 91 being extracted in order to specify the form of the trapping structure 101. The trapping structure 101 abuts against the cord member C and guides the cord member C to the insertion hole 102, and an internal holding position (holding space) from the guide portion 103 ), and a regulating portion 105 for preventing the cord member C from being removed from the holding position (holding space). The guiding part 103 has a contour line which is gradually removed (ie, inclined) backward from the front edge of the scalpel stand 91. As will be described later, while the cutter unit 50 (cutting device 90) is moving to the cutting preparation position, the cord member C extending upwardly (to be cut) while substantially following the vertical movement trajectory of the rod needle 6 ) Is brought into contact/contact with the front end edge of the scalpel table 91, at which time, the point where the cord member C first contacts the front end edge of the scalpel table 91, the guide portion 103 is formed. It is arranged so as to be a location (or is controlled as such by an additional control described later).

In addition, when the stitching of the cord material is finished, not only the rod needle 6 is raised to a predetermined position, but also the cord guide body 20 is cut through the lifting rod 12 by the control of the motor 13. It rises to a predetermined upper position higher than the preparation position, and does not interfere with the cutter unit 50 (cutting device 90) moving to the cutting preparation position. Therefore, while the cutter unit 50 (cutting device 90) is moving from the retracted position to the cutting preparation position, the cord material C to be cut is from the end position of the lockstitching of the cord material C on the material to be sealed. The cord guide body 20 at a predetermined upper position is in a state extending upward while substantially following the vertical movement trajectory of the rod needle 6.

With the shape of the trapping structure 101 as described above, when the cutter unit 50 is about to reach the cutting preparation position, a scalpel stand is placed in the middle portion of the cord member C to be cut (extended upward). (91) (particularly the portion of the guide portion 103) abuts, and the cord member (C) is guided to an inclined outline formed by the guide portion 103 to smoothly enter the insertion hole 102, and the insertion path 104 ), and smoothly guided to the holding position (space within the capture structure 101). After that, even if the pulled cord member C is bent with the fall of the cutter unit 50 (cutting device 90) and a movement (disengagement) from the holding position occurs, the regulation unit 105 As a result, the movement (fallout) of the cord member C is regulated. Thereby, at the time of the automatic cutting operation by the cutter unit 50 (cutting device 90), the cord material C can be cut|disconnected suitably without making a mistake. In addition, as shown in Fig. 5, the moving knife 93 is provided with a blade under the portion 93a, and when cutting the cord member C at a portion 93b different from that, the cord member C ) Is formed in the holding position. Therefore, in this embodiment, it is the regulating part 105 of the trapping structure 101 of the scalpel stage 91 to properly hold the cord material C in the holding position (space in the trapping structure 101) during cutting ), as well as cooperation with the holding part 93b of the moving mes 93, preferably achieved.

[Height adjustment device]

In the present invention, a height adjusting device for variably adjusting the height of the cutter unit 50 when cutting the cord material C is provided. In a preferred embodiment, this height adjustment device is constituted by at least a lifting member (for example the lifting rod 12). That is, the height of the lifting member (for example, the lifting rod 12) is adjusted according to the desired height (cutting position) of the cutter unit 50, and the lifting member (for example, the lifting rod 12) By lowering the cutter unit 50 along with the lowering of the cutter unit 50, the cutter unit 50 is moved to a position (cutting position) defined by the lifting member (for example, the lifting rod 12). .

Further, in a preferred embodiment (i.e., the illustrated embodiment), this height adjustment device is constituted by a combination of the elevating member (elevating rod 12) and the cord guide 20. That is, the lifting member (elevating rod 12) and the cord guide body 20 perform a height adjustment function of the cutter unit 50, which is different from the function at the time of the above-described lockstitching (code embroidery) operation of the cord material. By functioning to do so, a height adjustment device is realized. The height adjustment device in this embodiment is configured to lower the lifting rod 12 to a predetermined height (cutting position) after the sewing of the cord member C is finished, and the lifting rod 12 descending ), the height of the cutter unit 50 is adjusted by pressing the cutter unit 50 downward by the cord guide 20 (specifically, the pressing portion 18b) mounted at the lower end thereof. In more detail, the abutting member 95 fixed to the scalpel stand 91 of the cutting device 90 in the cutter unit 50, the push-down portion 18b of the cord guide body 20 (FIG. 5). The cutter unit 50 is lowered to the cutting position by abutting against and pressing downward. In the illustrated embodiment, when the cord material C is cut, the lifting rod 12 and the cord guide 20 are not used for stitching (code embroidery) of the cord material described above, so the lifting rod ( 12) and the cord guide body 20 can be used both as a lifting member (and a pressing body) for cutting a cord.

Preferably, the height adjustment device is configured to adjust the height of the cutter unit 20 according to the height (sublimation) of the cord material C sewn onto the material to be sealed. That is, when the lifting rod 12 functions as a lifting member for cutting the cord, the height of the lifting rod 12 (that is, the lower limit position of the cord guide body 20) is a cord sewn onto the material to be sealed. It is set variable according to the height (sublime) of the ash (C). Specifically, to adjust the height of the lifting bar 12 (that is, the lower limit position of the cord guide 20), this height is set as the stop target position of the motor 13 (second drive source), and the stop target It is carried out by stopping this motor 13 when it reaches the position.

As an example, when a side view of a code pattern of ``cord stitching'' whose height (sublimation) of the code material C sewn on the material to be sewn (W) is the minimum is shown in FIG. 10 (a), in the drawing, reference numerals The two-dot chain line with 91 indicates the height position of the scalpel stand 91 of the cutting device 90 set at the lower limit position for cutting (cutting position) corresponding to such a sewn cord pattern. Such a "stitching code" code pattern is obtained when the amount of the lifting stroke of the lifting rod 12 is set to zero in the above-described lockstitching operation of the cord material. In addition, as another example, a side view of the cord pattern in the case where the cord material (C) is ``loop stitched'' on the material to be sealed (W) is shown in Fig. 10(b), and in the drawing, 2 with reference numeral 91 The dashed-dotted line indicates the height position of the scalpel stand 91 of the cutting device 90 set at the lower limit position for cutting (cutting position) corresponding to the cord pattern of such a loop rod. Such a "lock stitching quality" code pattern is obtained when the lifting stroke amount of the lifting rod 12 is set to an appropriate value other than zero for the desired "lock stitching quality" in the code material lockstitching operation described above.

As is clear when comparing (a) and (b) of Fig. 10, the height of the cutting position of the cutter unit 50 (that is, the height of the scalpel 91) according to the height (height) of the sewn cord pattern. Is variablely adjusted. Of course, even in the loop stitching as shown in FIG. 10(b), the height of the cutting position of the cutter unit 50 (that is, the height of the scalpel stand 91) according to the difference in the sublime (height) of the finished loop stitching is It is variably regulated in various ways. In addition, although not shown, even in the case of forming a three-dimensional cord pattern other than the loop stitching, depending on the difference in the sublime (height) of the stitched cord pattern, the height of the cutting position of the cutter unit 50 (that is, the scalpel stand ( 91)'s height) is variable and adjustable.

The setting of the height of the cutting position of the cutter unit 50 (that is, the height of the scalpel stand 91) is the operation of the embroidery sewing machine according to the thickness of the cord material C or the sublime (height) of the stitched cord pattern, etc. By manually operating the panel by the operator, it can be set for each stitch of each sewing machine head. As another example, the cut position height data is programmed in the pattern data (stitching pattern data) for automatically stitching the code pattern, and when the automatic code stitching operation is executed, the cut position height data for the code pattern on which the stitching has been completed is stored. It may be called, and it may be possible to control the motor 13 according to the cutting position height data.

As is clear from the above, in the above-described embodiment, the function of the height adjustment device is a push-down mechanism composed of the above-described lifting member (elevating rod 12), motor 13, cord guide 20, and the like. Wow, a transfer mechanism on the side of the cord cutting device 40 for appropriately shifting the cutter unit 50 downward through the abutting member 95 (Fig. 5) in accordance with this pressing down (pressing down). It is realized by a combination of The transition mechanism on the side of the cord cutting device 40 will be further described with reference to Figs. 2, 5, 8, and the like. When a pressing force is applied to the abutting member 95 by the descending cord guide body 20, the first moving body 70 of the cutter unit 50 becomes the vertical portion 74c of the cam groove 74 Since it is in a state in which vertical movement with respect to the support plate 41 is allowed via (Fig. 8), it shifts downward. At that time, by fitting the guide rail 73 (FIG. 5) of the first moving body 70 and the slide guide 52 of the lifting base 49, the lifting base 49 is also shifted downward. . The vertical movement of the lifting base 49 is guided by the linear bushes 45 and 46 (FIG. 2) of the support base 41 via guide rods 43 and 44 (FIG. 2). In this way, the combination of the abutting member 95, the first moving body 70, the lifting base 49, the guide rods 43, 44, etc. provided in the cord cutting device 40, the cutter unit 50 It functions as a transfer mechanism that shifts from the cutting preparation position to the cutting position. Specifically, the configuration in which the lifting base 49 supporting the cutter unit 50 can move up and down via the guide rods 43 and 44 is to guide the cutter unit 50 from the cutting preparation position to the cutting position. It serves as a guide to the transition. Further, a structure in which the cutter unit 50 is pushed down by a lifting member (a lifting rod 12) via the cord guide body 20 functions as a means for pushing down the cutter unit 50. Further, the abutting member 95 (FIG. 5) provided on the scalpel stand 91 of the cutter unit 50 functions as a receiving portion for receiving a pressing force applied from the outside. Further, the coil spring 47 (FIG. 2), which presses the lifting base 49 upward, functions as a spring for returning the cutter unit 50 upward.

[Sequence of operations of the cord cut device 40]

Next, with reference to Figs. 11 to 14 and the like, a series of operations of the code-cutting device 40 having the above-described configuration will be described in detail. 11 to 14 are diagrams illustrating several main states in the operation process of the cord cutting device 40 and showing the right side of the cutter unit 50 and the like. In the figure, a hatched point shows a cross section. In addition, this series of operations is performed under control by an electronic control system provided in this embroidery sewing machine, similar to the stitching operation (code embroidery operation) of the cord material described above.

15 is a block diagram schematically showing an electronic control system provided in an embroidery sewing machine. This electronic control system, by processing of a computer (i.e., a control device) including a CPU (processor) 110 and a memory device 111, includes various lockstitching operations including a lockstitching operation (code embroidery operation) and Controls the series of operations (operations related to cutting the code). The memory device 111 is a semiconductor memory such as a ROM, RAM, and flash memory, a hard disk, a removable storage medium, and the like, as well-known, and these are generically shown. The operation panel 112 accepts user operations for performing various settings related to the operation of this embroidery sewing machine, such as various lockstitching operations including a lockstitching operation of a cord material. The X-Y drive device 113 X-Y drives the embroidery frame (not shown) according to the embroidery pattern for sewing. The main shaft motor 114 is a motor that drives the main shaft 8. The needle rod selection motor 115 is a motor that drives the slide shaft 7 for sliding the needle rod case 4 for needle rod selection. The sensor group 116 is the optical sensor 68, various sensors provided in connection with each motor, etc., and these are shown comprehensively. The motors 13 and 62 are also incorporated into the electronic control system via a bus. The memory device 111 includes a program for executing a series of operations described in the present specification (in particular, operations related to cutting of the code material C) in a predetermined order, the lockstitching operation of the code material described above, and others. Programs for controlling various operations are stored, and these programs can be executed by the CPU (processor) 110.

When the embroidery head 1 is performing the stitching operation (including the stitching operation of the cord material), the cutter unit 50 of the cord cutting device 40 is set at the retracted position shown in Fig. 2 or 7 And, of course, the cord cutting operation is not performed at this retracted position. Fig. 11 is a right side view showing the cutter unit 50 and the like in a state similarly placed in the retracted position. As described above, when the stitching of the cord material is finished, the rod needle 6 is raised to a predetermined position, and the cord guide 20 is moved through the lifting rod 12 by the control of the motor 13. It is raised to a predetermined upper position higher than the cutting preparation position. At the same time, control of moving the cutter unit 50 from the retreat position to the cutting preparation position is performed as in the following procedure 1. After that, the following steps 2 to 6 are performed.

Step 1: The motor 62 of the drive device 60 is rotated forward, and the moving body 65 attached to the timing belt 64 is moved (advanced) toward the front. At this time, the drive piece 66 of the moving body 65 is both a pair of rollers 77 of the first moving body 70 and a pair of rollers 82 of the second moving body 80, as shown in FIG. 11. Since they are engaged with both, both the first moving body 70 and the second moving body 80 advance by pressing the two pairs of front rollers 77 and 82. With this advancement, the position of the cam groove 74 of the first moving body 70 with respect to the fixed cam roller 54 is shifted along the inclination of the cam groove 74, so that the first moving body ( 70), the second moving body 80, and the cutting device 90 (thus the entire cutter unit 50) gradually descends, and the lifting base 49 also descends (see Fig. 7).

Step 2: Eventually, when the cutter unit 50 reaches the cutting preparation position, as shown in Fig. 8, the fixed cam roller 54 engages the bent portion 74b of the cam groove 74 and engages. As a result, advancement of the cutter unit 50 such as the first moving body 70 is mechanically stopped. When the cutter unit 50 reaches the cutting preparation position in this way, as described above with reference to FIG. 9, the intermediate portion of the cord member C guided by the cord guide 20 is the cutter unit 50 ) At the tip of the cutting device 90 in the holding position (space) in the trapping structure 101 of the scalpel stand 91, and the intermediate portion of the held cord member C is , It is between the fixed scalpel (first cutter part) 92 and the moving blade (second cutter part) 93 of the cutting device 90 (refer to FIG. 5).

Cooperation between the driving device 60 and the first and second moving bodies 70 and 80 on the side of the cutter unit 50 in these steps 1 and 2 moves the cutter unit 50 between the retracted position and the cutting preparation position. It functions as a moving mechanism to move in.

Step 3: When the cutter unit 50 reaches the cutting preparation position, the rotation of the motor 62 is stopped, and the driving of the motor 13 is started so as to lower the lifting bar 12. Fig. 12 is a right side view showing the cutter unit 50 and the like in a state in which the cutting preparation position is placed, and shows a state in which the cord guide body 20 continues to descend as the lifting bar 12 descends. In addition, in Figs. 12 to 14, the illustration of the cord material C is omitted for the sake of simplicity.

Eventually, when the pressing portion 18b of the cord guide body 20 descending with the lifting bar 12 abuts against the abutting member 95 of the cutting device 90, the abutting member 95 It is pushed down, and the cutting device 90 and the 1st moving body 70 and the 2nd moving body 80, that is, the whole of the cutter unit 50 are lowered through the scalpel stand 91. At this time, since the fixed cam roller 54 is engaged with the vertical portion 74c (refer to FIG. 7 or 8) of the cam groove 74 of the first moving body 70, the cutter unit 50, It does not move in the horizontal direction, but can move up and down in the vertical direction. In addition, since the height of the drive piece 66 on the side of the drive device 60 does not change, the entire cutter unit 50 descends, so the roller 77 and the second moving body ( The engagement relationship of the driving piece 66 with the roller 82 of the 80 changes, and finally, in the cutting position described below, only the roller 82 of the second moving body 80 is the driving piece 66 ) And become engaged. That is, as shown in FIG. 5, since the roller 77 of the first moving body 70 is disposed under the roller 82 of the second moving body 80, the driving piece 66 is By having a size in the vertical direction, when the first moving body 70 and the second moving body 80 move downward relative to the driving piece 66, the roller 82 of the second moving body 80 on the upper side The engagement of the driving piece 66 with respect to is maintained, but the engagement of the driving piece 66 with the roller 77 of the lower first moving body 70 is released. In this way, the position in which the engagement of the driving piece 66 with the roller 77 of the lower first moving body 70 is disengaged is when the cutter unit 50 reaches the cutting preparation position (Fig. 12). State) may be sufficient, it may be even when the cutter unit 50 reaches the cutting position (the state of Fig. 13), or when the cutter unit 50 is located between the cutting preparation position and the cutting position. In short, at least between the retracted position and the cutting preparation position, the first moving body 70 and the second moving body 80 move horizontally together with the drive of the driving piece 66, and at least the second moving body 70 It is okay if only the moving body 80 is made to move according to the drive of the drive piece 66.

Step 4: When the lifting rod 12 reaches a height that is set variable according to the height of the stitched cord pattern (that is, the lower limit position of the cord guide body 20), the motor 13 is stopped. This means that the cutter unit 50 has reached the height of the cutting position which is variably set according to the height of the stitched cord pattern. 13 is a right side view showing the cutter unit 50 or the like in a state where the cutting position has been reached. In this preferred embodiment, by controlling the height of the lifting bar 12 (that is, the lower limit position of the cord guide body 20) in this step 4, the function of the height adjustment device is realized.

The transition from the cutting preparation position to the cutting position of the cutter unit 50 in these steps 3 and 4 is a push-down mechanism composed of a lifting member (elevating rod 12), a cord guide 20, and the like, as described above. And, it is realized by a combination of the abutting member 95 in the cord cutting device 40, the first moving body 70, the lifting base 49, the guide rods 43, 44, and the like with a transfer mechanism. .

Step 5: With the cutter unit 50 placed in the cutting position, the motor 62 of the drive device 60 is rotated forward by an amount required for the cutting operation, so that the moving blade of the cutting device 90 2 Cutter part) 93 is moved, and by this, the cord material C held in the holding|maintenance position (space) in the catch structure 101 of the said scalpel stand 91 is cut|disconnected. That is, as shown in Fig. 13, when the cutter unit 50 reaches the cutting position, the engagement of the drive piece 66 with the roller 82 of the second moving body 80 on the upper side is maintained, but the lower side The engagement of the drive piece 66 with the roller 77 of the first moving body 70 of the unit is in a disengaged state. Therefore, when the driving piece 66 advances a predetermined distance by the forward rotation of the motor 62, the first moving body 70 does not move, and only the second moving body 80 advances. Thereby, as described above with reference to FIG. 5, in the cutting device 90, the movable sword 93 is rotated clockwise by a link mechanism including the swinging link 96 and the rotating link 97 , The cord member C is cut. 14 is a right side view showing the cutter unit 50 or the like immediately after performing a cutting operation at the cutting position. In addition, during the cutting operation, since the cord guide body 20 presses down the cutter unit 50, the cord material C on the material to be sealed can be pressed by the lower surface of the scalpel stand 91, and when cutting There is an additional effect of being able to suppress the dropout of the cord member C. After cutting the cord member C, by rotating the motor 62 of the drive device 60 reversely by a predetermined amount, the second moving body 80 is retracted to the position shown in FIG. 13, for example, and the moving sword 93 Return to the initial position. In this way, the cutting operation is completed.

Step 6: After the cutting operation is completed, the lifting rod 12 is raised by rotating the motor 13 in reverse, and the cord guide 20 is moved upward (for example, it is returned to the above predetermined upper position). . As the cord guide body 20 rises, the pressing force on the cutter unit 50 is released, and the cutter unit 50 rises together with the lifting base 49 by the restoring force of the coil spring 47. Thereby, the cutter unit 50 rises to the position shown in FIG. At the same time, the drive piece 66 is retracted by rotating the motor 62 of the drive device 60 in reverse. In the position shown in Fig. 12, both the rollers 77 of the first moving body 70 and the rollers 82 of the second moving body 80 are engaged with the drive piece 66, so that the drive piece 66 is retracted. As a result, the cutter unit 50 is also retracted and returned to the retracted position shown in FIG. 11. Upon returning to the retracted position, the motor 62 is stopped, and a series of operations is ended.

As described above, according to the present embodiment, at the end of the stitching of the cord material, the cord material C can be automatically cut at an appropriately set arbitrary height. Therefore, by changing the height of the cut point according to the thickness of the cord material (C) and the thickness of the material to be sealed (W) (cloth) and the sublime (overall thickness) of the sewn cord pattern, the lockstability of the cord material (C) It is always possible to cut at a height suitable for the finished state, and this makes it possible to make the remaining length of the cord material (C) after cutting on the side of the material to be sealed (W) (cloth) to an appropriate length without excess. Therefore, the process of cutting the end of the cord material C by hand after sealing becomes unnecessary. For example, in Fig. 10, the difference in the height of the cut point of the cord material C according to the difference in the sublime (overall thickness) of the cord pattern according to the present embodiment is illustrated. That is, when the sublime (overall thickness) of the cord pattern is low as shown in Fig. 10(a), the height of the cut point Ce1 of the cord material C is lowered accordingly, as shown in Fig. 10(b). When the height (overall thickness) of the cord pattern is high, the height of the cut point Ce2 of the cord material C becomes high accordingly.

[Relationship with thread cutting]

In the above embodiment, the relationship between the cutting of the upper thread passed through the rod needle 6 and the cutting of the cord member C is not specifically described. That is, the present invention can be implemented regardless of the thread cutting technique. However, in a preferred embodiment, in automating the cutting of the cord member C, it is good to cut the upper thread (and the lower thread) before cutting the cord member C. Because, if the cutting operation of the cord material (C) is performed while the upper thread is connected to the material (cloth) side from the invasion of the needle needle (6), the upper thread is cut together with the cord material (C), and the needle needle This is because the remaining length of the upper thread on the (6) side becomes shorter. As such, when the remaining length of the upper thread on the side of the needle needle 6 is shortened, there arises a problem that it becomes difficult to start the next stitching as it is. Therefore, as one method to prevent such a problem from occurring, it is preferable to cut the upper thread (and the lower thread) at the end of the stitching of the cord material, before cutting the cord material C according to the present invention. . As is commonly known, in a sewing machine, a thread cutting device is provided in the lower part of the table 10, thereby cutting the upper thread and the lower thread. The upper thread hook 16 and the upper thread holder 17 shown in FIG. 2 are, as known, before or after the thread cutting by the thread cutting device, and hook the upper thread by the upper thread hook 16. It is for holding on the holder 17 In this way, if the upper thread is held in the upper thread holder 17, there is no possibility that the upper thread will be cut together when the cord member C is cut.

[Standby position of cord guide (thread cutting position)]

In the above embodiment, it has been explained that when the stitching of the cord material is finished, the cord guide body 20 is raised to a predetermined upper position higher than the cutting preparation position. This predetermined upper position is a rest position (or a retreat position) when the lockstitch operation is not performed, and is usually the highest height. However, as described above, since the thread cutting operation is performed before the cutting operation of the cord member C, if the cord guide body 20 is placed in the uppermost resting position (or retracted position), the cord guide body 20 Since the cord material (C) connected to the material to be sealed is rolled into the upper thread pulling motion by the upper thread hook 16, it is not preferable. Therefore, in this embodiment, at the time of thread cutting, the cord guide body 20 is positioned at a stand-by position (thread cutting position) of a predetermined height. The standby position (thread cutting position) of the cord guide body 20 is a position lower than the advancing position (moving trajectory) of the upper thread hook 16.

16 is an enlarged side view showing an example of a preferred standby position (thread cutting position) of the cord guide body 20 at the time of thread cutting. The position of the cord guide body 20 shown in FIG. 16 specifies this standby position (thread cutting position), and reference numeral 16' denotes an upper thread (not shown) extending from the needle needle 6 to the material to be sealed. In order to hang, the state in which the upper thread hook 16 has advanced on the vertical movement line of the bong needle 6 is indicated by a two-dot chain line. That is, the standby position (thread cutting position) of the cord guide body 20 means that the cord member C connected from the cord guide body 20 to the material to be sealed is the upper thread by the upper thread hook 16. It is a position that does not interfere with the operation, and is below the advancing position of the upper thread hook 16 (dashed-dotted line 16'). By setting the standby position of the cord guide body 20 in this way, as shown, the cord material C connected from the cord guide body 20 to the material to be sealed advances the upper thread hook 16 Since it deviates from the position (dashed-dotted line 16'), this cord material C is not caught by the upper thread hook 16. In addition, when the thread cutting is finished, the cord guide body 20 is raised again to the predetermined upper position, that is, the rest position (or the retracted position), and then, the cord cutting operation by the cord cutting device 40 is described above. It is done in the same order.

The advantage of having the cord guide body 20 having the tubular portion 20e has already been described, but with respect to the upper thread pulling operation by the upper thread hook 16, it has a further advantage, and therefore, for this point. Explain. As shown in Fig. 16, when the standby position of the cord guide body 20 is set below the advance position of the upper thread hook 16 (double-dot chain line 16'), the cylindrical portion 20e is If not provided, the portion of the cord member C on the supply side above the cord guide body 20 may interfere with the upper thread pulling motion by the upper thread hook 16, as indicated by the broken line C'. It is placed. However, as described above, due to the presence of the tubular portion 20e, the inlet 20d of the cord guide body 20 is further away from the lead-out hole 20b (settlement position). The portion of the cord member C on the supply side of the upper part is prevented from being pinched into the exit position of the upper thread hook 16 (double-dot chain line 16'). Accordingly, the portion of the cord material C on the supply side above the inlet 20d of the cord guide body 20 does not interfere with the upper thread pulling operation by the upper thread hook 16.

[Additional control related to code cutting operation]

A series of operations performed by the cord cutting device 40 for cutting the cord has already been described. As an additional control related to such a cord cutting operation as a preferred embodiment, cutting by the catching structure 101 (Fig. 9) provided in the scalpel 91 of the cutting device 90 of the cutter unit 50 It is okay to perform control so that the intermediate portion of the target cord material C is reliably captured.

First, immediately before starting the cord cutting operation by the cord cutting device 40, that is, immediately before starting the forward rotation of the motor 62 of the driving device 60 in step 1, the embroidery frame is removed from the cord material. From the end position of the lockstitch, it is moved by a predetermined distance in the right direction (X direction) viewed from the front. This predetermined distance means that the cord member C extending upward from the end position of the lockstitch of the cord member toward the cord guide body 20 is in the front-rear direction Y Direction). This predetermined distance is generally determined according to the amount of displacement in the X direction between the sinking position of the cord guide 20 and the position of the guide portion 103 of the scalpel 91. In this way, by moving the embroidery frame by a predetermined distance in the X direction, the cord member C connected from the cord guide 20 to the material to be sealed is transferred to the guide portion 103 of the scalpel stand 91. It is located in the front.

In this state, steps 1 and 2 are performed. Thereby, as the cutter unit 50 advances, when the cord member C extending upward from the end position of the lockstitch of the cord member comes into contact with the scalpel stand 91, the cord member C is trapped. It is guided by an inclined outline formed by the guide portion 103 of (101) and smoothly enters the insertion hole (102).

Next, before executing the step 3 or simultaneously with the step 3, the embroidery frame is returned by a predetermined distance in the left direction (X direction). Thereby, the cord material C passes through the insertion path 104 and is guided to the holding position (the space in the trapping structure 101), is returned to the original lockstitch end position, and is brought to the holding position in the catching structure 101. Maintained appropriately. After that, the above steps 4 to 6 are executed, and the code cutting operation is performed as described above.

[Fully automatic operation related to code embroidery]

Next, an embodiment of the fully automatic processing of the code embroidery-related operation performed using the embroidery sewing machine shown in the above embodiment will be described with reference to FIG. 17. FIG. 17 is a flow chart showing an embodiment of a full-automatic processing of an operation related to code embroidery, for example, a control device included in the electronic control system shown in FIG. 15 (CPU 110, memory device 111, etc.) It is executed by controlling the operation of each device in the embroidery sewing machine shown in the above embodiment according to an instruction or the like from

Fig. 17A shows the overall processing flow. In step S1, the code material stitching start control is performed. As a premise of performing this code material lockstitch start control (S1), the cord guide body 20 is mounted at the lower end of the lifting rod 12 corresponding to the needle rod 5 selected for lockstitching, and the cord guide body 20 ), the cord member (C) is introduced through the tubular portion (20e), and the tip portion of the cord member (C) comes out of the lead-out hole (20b) of the cord guide body (20) and is dropped to an appropriate length. It is assumed to be in the state. First of all, when the stitching of the cord material is started, the tip portion of the cord material C is brought down from the lead-out hole 20b of the cord guide body 20 as described above, of course, by hand. However, after cutting the cord material C as described above, when starting (resuming) the lockstitching of the same cord material C, the tip portion of the cord material C after cutting (remaining length portion of the start of stitching ) Is in the state of being dropped off from the lead-out hole 20b of the cord guide body 20, there is no need to perform a special manual operation in order to set it to such a prerequisite state. The cord material lockstitching start control performed in step S1 automatically places the tip of the cord material C in the state of being dropped from the lead-out hole 20b of the cord guide body 20 on the material to be sealed W in this way. It is a control that performs stitching and fixing.

17B shows a specific example of the code material lockstitch start control performed in step S1. First, in the first step S11, the main shaft motor 114 and the motor 13 are controlled to lower the rod needle 6 and the cord guide 20 respectively in the upper predetermined rest positions. Both lowering control is performed so that the part of the cord material C passing through the lead-out hole 20b of the cord guide body 20 is stabbed by the descending rod needle 6 and dropped onto the material to be sealed W. , It is performed appropriately in synchronization. Thereby, if the length of the stitching start remaining length of the cord material C dropped from the cord guide body 20 (that is, the length from directly under the cord guide body 20 to the tip end of the cord material C) is Even if it is short, since the cord member C falls together by being pierced by the descending rod needle 6, there is no problem that the cord member comes out of the cord guide member during the lowering of the cord guide body 20, and the cord The tip portion of the guide body 20 can be reliably dropped onto the material to be sealed (W).

Next, in the first step (S12), by controlling the main shaft motor 114 and the motor 13, the rod needle 6 is rotated a plurality of times while the lowered cord guide body 20 is held at the lower limit position. A lock-stitching operation is performed, and by this, the part of the cord material C dropped on the material to be sewn W is sewn and fixed in a plurality of stitches on the material to be sealed W. Accordingly, in a state where the portion of the cord material C dropped on the material to be sealed W is reliably held by the cord guide body 20, a plurality of stitches are sewn, and the cord material C The portion of (i.e., the start end of the lockstitch) is securely sewn and fixed.

In addition, since the above-described cutting of the cord material is performed in a state where a certain amount of tension is applied to the cord material (C), in the cord material (C) made of a material with shrinkage, after cutting, by releasing the tension, the cut The length of the cord member C in the vicinity of the location is considerably shortened (that is, it returns to the normal length from the extended state). Therefore, the length from the cord guide body 20 to the tip portion of the cord material C after cutting extending downward therefrom (remaining length from which the stitching starts) is shortened. However, even in such a case, according to the lockstitch start control according to the present embodiment, since the cord member C descends together by being stabbed by the descending rod needle 6, the tip portion of the cord guide member C is reliably avoided. Dropped on the sealing material (W), it can be secured by stitching.

In this way, according to the lockstitch start control according to the present embodiment, it is possible to lock and fix the start end of the cord material automatically without requiring a human hand, and the cord material of any material (especially a material having abundant shrinkage) can be , You can prevent the start of stitching and miss.

Returning to Fig. 17A, after step S1, in step S2, the main processing, the lockstitch control (code embroidery control) of the cord material is performed. That is, in step S2, according to the selected code material lockstitch pattern (code embroidery pattern), XY driving of the embroidery frame for each stitch is performed as known, and the lifting stroke of the lifting rod 12 according to the present embodiment is A lockstitching operation (code embroidery operation) of a coded material is advanced by an arbitrary codestitching style based on variable control ("codestitching", "loop stitching" or "three-dimensional coded pattern formation", etc.).

When the series of pattern stitching for one cord material is finished, the process proceeds from step S2 to step S3. In step S3, as described in the above embodiment, control of the upper thread pulling operation by the upper thread hook 16 including control of the cord guide body 20 to the standby position and the upper thread by a known thread cutting device. And controlling the cutting operation of the lower thread.

After step S3, in step S4, code cut control is performed. The cord cut control consists of cutting the cord material C by the cord cutting device 40 after the stitching of the cord material C is finished, as described in the above embodiment. In this step S4, code cut control is performed, for example, in steps 1 to 6 described above.

After the end of the code cut control, when the stitching of the other code material C is started, or when the stitching of the same code material C is resumed, the process returns to step S1 and the same processing routine as described above is repeated. In this way, the entire process of the code embroidery-related operation can be fully automated.

[Modified example of cutter unit]

18 is a perspective view showing a modified example of the cutter unit 50 by extracting, in particular, portions of the first moving body 70, the second moving body 80, and the cutting device 90. The first moving body 70, the second moving body 80, and the cutting device 90 shown in the modified example of FIG. 18, the first moving body 70 of the same reference numerals shown in the above embodiment (especially FIG. 5), The difference between the second moving body 80 and the cutting device 90 is as follows. 18, first, a compression spring 117 is provided in the guide shaft 76 of the first moving body 70, and the moving base of the second moving body 80 movable in the front-rear direction along the guide shaft 76 It is configured such that a pressing force acts in the direction of increasing the distance between 81 and the fixed end near the front of the guide shaft 76. Next, among the pair of rollers 77 on the side of the first moving body 70, the rollers on the front side (indicated by reference numeral 77a in FIG. 18) are disposed at a position shifted by an appropriate amount forward than the arrangement shown in FIG. In addition, there is no change in the arrangement of the rollers on the rear side of the pair of rollers 77, and there is no change in the arrangement of the pair of rollers 82 of the second moving body 80. That is, the distance between the rollers 77a on the front side and the rollers on the rear side of the pair of rollers 77 is wider than the distance shown in FIG. 5. In addition, in the modified example of FIG. 18, the shape of the holding part 93c of the moving knife 93 provided in the cutting device 90 is more than the shape of the holding part 93b of the moving knife 93 shown in FIG. The shape is slightly protruding. Other configurations in Fig. 18 are not changed, and are the same as those indicated by the same reference numerals in the above embodiment (especially Fig. 5).

The operation of the modified example shown in Fig. 18 will be described below. First, an operation when moving the cutter unit 50 from the retracting position to the cutting preparation position will be described. At the retracted position of the cutter unit 50, the drive piece 66 (refer to FIG. 5, etc.) of the moving body 65 is engaged between the pair of rollers 82 of the second moving body 80, but the first moving body In the pair of rollers 77 of (70), they are only in contact with the rear roller. When the drive piece 66 of the moving body 65 moves forward in accordance with the forward rotation of the motor 62 (refer to FIG. 5, etc.) of the driving device 60, the pair of rollers 82 of the second moving body 80 The second moving body 80 moves forward by the engagement, and the moving base 81 of the second moving body 80 acts on the compression spring 117, and accordingly, near the front of the guide shaft 76 The fixed end moves forward, and as a result, the first moving body 70 moves forward, and the entire cutter unit 50 moves forward.

When the cutter unit 50 reaches the ready-to-cut position, the first moving body 70, as shown in FIG. 8, abuts the cam roller 54 to the bent portion 74b of the cam groove 74. Advancement is stopped. On the other hand, even if the cutter unit 50 reaches the cutting preparation position, the forward rotation of the motor 62 does not stop immediately, and the second moving body 80 slightly moves forward. By the further movement of the second moving body 80 forward, the holding portion 93c of the moving mes 93 disposed at the front end of the second moving body 80 slightly moves forward. At this time, since the movement of the second moving body 80 to the front of the moving base 81 is absorbed by the compression spring 117, the first moving body 70 does not move. Therefore, the trapping structure 101 of the scalpel stage 91 disposed at the front end of the first moving body 70 does not move, and the holding portion 93c of the moving knife 93 is the trapping structure of the scalpel stage 91 It moves slightly forward relative to (101). As described above, when the cutter unit 50 reaches the cutting preparation position, the intermediate portion of the cord member C guided by the cord guide body 20 is the scalpel stand 91 of the cutting device 90 It is in a state held at a holding position (space) in the trapping structure 101, and the intermediate portion of the held cord material C is the fixed scalpel 92 and the moving scalpel 93 of the cutting device 90. ). Therefore, in accordance with the further movement of the second moving body 80 forward in this cutting preparation position, the holding portion 93c of the moving mess 93 is relatively relatively to the catching structure 101 of the scalpel stand 91 By slightly moving forward, the insertion hole 102 (FIG. 9) of the trapping structure 101 is blocked by the holding part 93c of the moving knife 93, and the holding position in the trapping structure 101 The intermediate portion of the cord member C held in the (space) is in a state surrounded by the holding portion 93c of the moving knife 93. In other words, the amount of forward rotation of the motor 62 that continues even after the cutter unit 50 reaches the cutting preparation position is determined by the holding portion 93c of the moving knife 93 and the insertion port 102 of the catching structure 101. ) (FIG. 9) is a small amount to block, and the cutting operation is not performed. As a result, the intermediate portion of the cord member C is reliably held at the holding position (space) in the trapping structure 101, and does not protrude out from the insertion port 102 (FIG. 9). Further, by the arrangement of the front roller (77a in Fig. 18) among the pair of rollers 77 on the side of the first moving body 70, the holding portion 93c of the moving sword 93 after reaching the cutting preparation position. It is okay to regulate the amount of microscopic movement of the person.

After that, the rotation of the motor 62 is stopped, the drive of the motor 13 is started, and the lifting bar 12 is lowered. Thereby, as in the above embodiment, the cutter unit 50 descends from the cutting preparation position to the cutting position. As in the above embodiment, when the cutter unit 50 descends to the cutting position, the motor 13 is stopped, and the motor 62 of the driving device 60 is rotated forward by an amount required for the cutting operation, thereby cutting The moving scalpel (second cutter part) 93 of the apparatus 90 is moved, and thereby, the cord material C held in the holding position (space) in the catching structure 101 of the scalpel table 91 ) Is cut. That is, as in the above embodiment, when the cutter unit 50 reaches the cutting position, the engagement of the driving piece 66 with the roller 82 of the second moving body 80 on the upper side is maintained, but the lower side Since the engagement of the driving piece 66 with the roller 77 of the first moving body 70 is released, when the driving piece 66 advances a predetermined distance by the forward rotation of the motor 62, the first moving body 70 ) Does not move, only the second moving body 80 advances, and the cord member C is cut. As described above, in the process in which the cutter unit 50 descends from the cutting preparation position to the cutting position, the intermediate portion of the cord member C is reliably held in the holding position (space) in this trapping structure 101, Since it does not protrude out from the insertion hole 102 (FIG. 9), a mistake in which the cord member C becomes a member at the cutting position does not occur, and therefore, a mistake that the cord member C cannot be cut does not occur.

[Other variations]

In addition, in the above embodiment, in the height adjustment device, in order to adjust the height of the cutter unit 50 according to the height (sublimation) of the cord material C sewn on the material to be sewn, manual operation by the operator is required. A target position according to the height (sublimation) of the cord material C is set by or by data prescribed in advance in the lockstitch program, and the motor 13 is stopped at this target position. However, it is not limited to this, and other control techniques may be employed. For example, after the sewing of the cord material is finished and before the cord is cut, the lifting bar 12 is lowered by driving the motor 13 with low power, and the cord guide 20 is used as the cord material (C). It detects that the cord guide body 20 abuts against the cord member C from the change in the load of the motor 13 when it comes into contact with, and reads the driving position of the motor 13 at that time with a sensor. Based on this, the height (sublimation) of the cord member C may be automatically detected (estimated). Then, the height (sublimation) of the cord material C automatically detected (estimated) in this way is set as the cutting position (target position), and the motor 13 for cutting the cord may be controlled. Of course, the method for automatically detecting (estimating) the height (sublimation) of the cord member C is not limited to the above, and other methods may be used.

In addition, in the above embodiment, the height adjustment device for variably adjusting the height of the cutter unit 50 is a combination of a lifting member (elevating rod 12) and a motor 13 for lifting the cord guide body 20 It is made of, and a device for stitching operation of a cord material is shared. However, the present invention is not limited thereto, and a height adjustment device may be configured by a lifting member and/or a driving device for exclusive use of height adjustment. Alternatively, a structure in which a drive source on the side of the cord cutting device 40 (for example, a motor 62 or a dedicated drive source) can be used as a drive source for height adjustment of the cutter unit 50 may be adopted.

Similarly, in the above embodiment, the combination of the lifting member (elevating rod 12) for lifting the cord guide body 20 and the motor 13 shifts the cutter unit 50 from the ready-to-cut position to the cut-off position. As a mechanism, in particular, it functions as a means for pushing down the cutter unit 50 from the cutting preparation position to the cutting position, but the specific configuration of this transfer mechanism is not limited to this. For example, a drive source on the side of the cord cutting device 40 (for example, a motor 62 or a dedicated drive source) may be used to shift the cutter unit 50 from the cutting preparation position to the cutting position.

In addition, in the above embodiment, a multi-head sewing machine (multi-head embroidery machine) having a plurality of sewing heads 1 has been described, but the present invention is not limited to this, and a machine having a single sewing head 1 (single-head embroidery machine) The present invention can be applied. In addition, in the above embodiment, one sewing machine head 1 is provided with a plurality of needle rods 5, but the present invention is not limited thereto, and one sewing machine head 1 is provided with a single needle rod 5 The present invention can also be applied to (embroidery sewing machine). In addition, it is not limited to the embroidery sewing machine that seals the decorative cord material, and the material is not limited, such as a sewing machine that sews and fixes the heater wire. The invention can be applied.

In addition, in the above embodiment, the cord material storage portion (bobbin 27) for storing the cord material is disposed above the sewing machine head 1, but it is not limited to this, and any such as the rear of the sewing machine head 1 It is okay to place it in the place of. For example, when a cord material storage unit (bobbin 27) is disposed at the rear of the sewing machine head 1, the cord material fed from the cord material storage unit passes above the sewing machine head 1 and is placed on the front surface. An appropriate supply path is formed so as to come, and after that, the cord material may be supplied through a path (a path passing through the tube 31) that traverses from the top to the bottom in the front of the sewing machine head 1 as described above. In addition, the cord material storage unit is not limited to the winding type like the bobbin 27, and may be one that houses the cord material in any other storage type.

Claims (22)

A lockstitching mechanism configured to drive a bong needle in order to perform a lockstitching on the material to be sealed,
A cord guide device configured to guide the cord material to a sinking position (here, the cord material guided to the sinking position is sewn onto the to-be-sealed material by a lockstitching operation by the lockstitching mechanism),
A cord cutting device having a cutter unit for cutting the cord material, disposed at a predetermined retracting position during the lockstitching operation, and configured to be moved to a position for cutting the cord material after the end of the lockstitching of the cord material,
A sewing machine comprising a height adjusting device for variably adjusting the height of the cutter unit when cutting the cord material. The method according to claim 1,
The height adjustment device includes an elevating member capable of vertical movement, the height of the elevating member can be adjusted, and by moving the cutter unit in accordance with the movement of the elevating member, the cutter unit is moved to the height of the elevating member. A sewing machine that moves to the cutting position specified by. The method according to claim 1,
The lockstitch mechanism includes an elevating member capable of vertical movement,
The cord guide device includes a cord guide body for guiding the cord material, mounted at a lower end of the lifting member, and by moving the lifting member up and down in synchronization with a lockstitch operation, through the cord guide body, the It is configured to guide the cord material to the sinking position,
The height adjustment device is configured to lower the elevating member to a set height after the sewing of the cord material is finished, and the cutter unit is lowered by the cord guide body mounted on the lower end of the elevating member to descend. A sewing machine, characterized in that the height of the cutter unit is adjusted by pressing with 向). The method according to any one of claims 1 to 3,
The cord cutting device includes a moving mechanism for moving the cutter unit between the retracting position away from the movement trajectory of the bong needle and a cutting preparation position entering the movement trajectory of the bong needle. The method of claim 4,
The cutting preparation position is lower than the retracting position, and a position for cutting the cord material is lower than the cutting preparation position. The method according to any one of claims 2 to 5,
The cord cutting device includes a spring for returning the height of the cutter unit upward, and the cutter unit is raised by a return force of the spring when the lifting member is raised. The method according to any one of claims 1 to 6,
The height adjustment device is a sewing machine that adjusts the height of the cutter unit according to the height of the cord material sewn onto the material to be sealed. The method according to claim 1,
The lockstitch mechanism,
A needle rod case in which a plurality of needle rods to which the needle needles are mounted are stored horizontally and side by side, and is made by further accommodating one or more elevating members respectively provided at the rear of the needle rod corresponding to one or more needle rods, and The needle rod case slidable in the transverse direction to position the needle rod and the elevating member corresponding thereto at a predetermined movable position,
A first driving source for vertically moving the needle rod by engaging the single needle rod located at the movable position,
And a second driving source for vertically moving the elevating member by engaging with the one elevating member positioned at the movable position,
The code guide device includes one or more cord guides provided corresponding to the one or more lifting members, and each code guide is mounted at a lower end of the corresponding lifting member, and a pressing part for pressing the material to be sealed Wow, a sewing machine having an opening for allowing passage of the rod needle and guiding the cord material onto the material to be sealed. The method of claim 8,
The height adjustment device is configured to lower the elevating member to a set height by control of the second driving source after the sewing of the cord material is finished, and to the cord guide body mounted on the lower end of the elevating member to descend. The sewing machine in which the height of the cutter unit is adjusted by pressing the cutter unit downward. As a cord cutting device used to cut the cord material after the sewing of the cord material is finished in a sewing machine for stitching the cord material to the material to be sealed,
A cutter unit for cutting the cord material,
A moving mechanism for moving the cutter unit between a retracting position and a cutting preparation position,
A transfer mechanism for transferring the cutter unit from the cutting preparation position to a cutting position below the cutting preparation position,
A cord cutting device configured to cut the cord material by the cutter unit at the cutting position. The method of claim 10,
The transfer mechanism includes a transfer guide for guiding the cutter unit from the cutting preparation position to the cutting position. The method according to claim 10 or 11,
The transfer mechanism includes a means for pressing down the cutter unit. The method of claim 12,
The means for pressing down includes a receiving portion receiving a pressing force applied from the outside, and pressing down the cutter unit according to the pressing pressure received by the receiving portion. The method of claim 13,
The receiving portion is a cord receiving pressure from the descending cord guide by moving the cord guide member for guiding the cord member to the sinking position during the cord lock operation of the sewing machine when the cord member is cut. Cut device. The method according to any one of claims 12 to 14,
A cord cutting device comprising a spring for returning the cutter unit upward, wherein the cutter unit is raised by a return force of the spring. The method according to any one of claims 10 to 15,
The cutter unit includes a catching means for catching the cord material at the cutting preparation position. The method of claim 16,
The catching means is a cord cutting device comprising a catching structure that abuts the cord material and guides the abutted cord material to an internal holding space in a process of movement until the cutter unit reaches the cutting preparation position. The method according to any one of claims 10 to 17,
The retracting position and the cutting preparation position are horizontally spaced apart, and the height of the retracting position is higher than the cutting preparation position. The method of claim 18,
The moving mechanism includes a cam groove defining a moving path between the retracting position and the cutting preparation position. The method according to any one of claims 10 to 19,
The moving mechanism includes a driving source for moving the cutter unit between the retracting position and the cutting preparation position, and a driving force of the driving source is also used for a cutting operation of the cutter unit. The method of claim 20,
The cutter unit includes a first cutter part in which one of a pair of cutter blades is disposed, and a second cutter part in which the other of the pair of cutter blades is disposed, and with respect to the first cutter part, the second cutter part It is to perform the cutting operation by moving the Relatively,
The moving mechanism integrally moves the first and second cutter parts by the drive source between at least the retracted position and the cutting preparation position, and the second with respect to the first cutter part during a cutting operation. A cord cutting device comprising a switching mechanism for switching transmission of the drive source so as to move the cutter component relatively. The method of claim 21,
The switching mechanism couples both the first and second cutter parts to the drive source at least between the retracting position and the cutting preparation position, and of the drive source with respect to the first cutter part at a position where a cutting operation is performed. A cord cut device comprising a member for releasing engagement.

Images