KR100861147B1 - Cloth feeding apparatus of sewing machine - Google Patents

Abstract

It is an object of the present invention to provide a cloth conveying apparatus which is compact and which can be moved more accurately when moving in the slide direction.

As a means to solve this problem, the left and right feed teeth (27, 28, 65, 66) consisting of the right feed teeth and left feed teeth divided along the cloth feed direction,

A feeder 20 for supporting the left and right feed teeth so as to be movable in a direction crossing the cloth feed direction;

Up and down driving means 35 for imparting the movement in the vertical direction to the left and right feed teeth,

Horizontal driving means (38) for imparting horizontal movement to the left and right feed cogs;

In the fabric transfer apparatus of the sewing machine having left and right driving means (51, 63, actuator) capable of imparting the movement in the slide direction intersecting in the cloth transfer direction to the left and right feed teeth,

A plurality of support shafts 29a, 29b, 67, 68 fixed to the left and right feed teeth and arranged along the slide direction;

In order to support this support shaft so that it can move along a slide direction, it was set as the structure provided with the several support hole 21c, 21d, 21m, 21n formed in the both ends of the said slide direction in the slide direction.

Description

Cloth feeder of sewing machine {CLOTH FEEDING APPARATUS OF SEWING MACHINE}

1 is an exploded perspective view of the first embodiment;

2 is a front view after assembling of the first embodiment;

3 is an exploded view of each component of FIG. 2;

FIG. 4 is a side view of each part of FIG. 2. FIG.

5 is an exploded view and an assembly view of a feed tooth.

6 is a cross-sectional view taken along the line K-K of FIG.

7 is an exploded perspective view of the second embodiment;

8 is an exploded perspective view of the third embodiment;

9 is an explanatory diagram of a fourth embodiment;

10 is a modification of the feed tooth rib structure.

Figure 11 is a conventional feed tooth device.

12 is an exploded perspective view of the fifth embodiment;

Fig. 13 is a side view of the main portion of the fifth embodiment;

Fig. 14 is a detailed view of the cam portion in the fifth embodiment.

Fig. 15 is a detailed view of the cam portion in the sixth embodiment.

Figure 16 is an explanatory diagram of the cam part adjustment position in the sixth embodiment;                 

17 is an explanatory diagram of a seventh embodiment;

18 is an explanatory diagram of an eighth embodiment;

19 is an explanatory diagram of a ninth embodiment;

※ Explanation of symbols about main part of drawing ※

27: Right feed tooth 28: Left feed tooth

65: Right feed tooth 66: Left feed tooth

20: transportation platform 35: Shanghai East Sudan

38: horizontal moving means 51: left and right moving means

63: left and right moving means 29a: right support shaft (support shaft)

29b: Left support shaft (support shaft) 67: Each pin (support shaft)

68: each pin (support shaft) 21c: support hole

21d: support hole 21m: each hole (supporting hole)

21n: each hole (supporting hole) 26: slide rail (engagement means)

9: guide groove (joining means) 23: right feed tooth

24: left feed tooth 23d: incision

24d: Incision 27b: Right grip (grip)

28b: left grip part (gripping part) 27ba: rib

28ba: Rib 80,81: Left and right feed tooth

84,85: left and right feed cogs 82,83,86: straight feed cogs

88: slide feed tooth 87: straight feed tooth

The present invention relates to a cloth transfer device for a sewing machine, and more particularly, to a cloth transfer device for a sewing machine that can impart a movement in a direction crossing the cloth transfer direction with respect to the left and right feed teeth.

Background Art [0002] Conventionally, as a cloth feeding device for this type of sewing machine, it is known to move the left and right feed teeth in the slide direction so as to be spaced apart from each other during the cloth feeding, as described in Japanese Patent Application Laid-Open No. 2000-271364. As shown in Fig. 11, the apparatus has a flat C-shaped feeder 1, a right feeder tooth 2 and a left feeder tooth 3 placed on the feeder 1 (right feeder tooth and left feeder). Combined with the teeth, it is also called 'left and right feed teeth') and one end is fixed to the left and right feed teeth (2) and (3), while the other end is fixed and maintained separately from the left and right feed teeth (4) and (5). It consists of the one grip part 6 (7) and the book 8 etc. which are arrange | positioned at the bottom of the center cut-out part of the conveyance stand 1, and the like. The left and right feed teeth 4 and 5 have one end fixed to one grip part 6 and 7, and the other end is supported by the other grip parts 6 and 7 after assembly.

The left and right feed teeth (2) and (3) are supported so that their front end portions (2a) and (3a) are slidable to the feed tooth guide grooves (9), and the support shafts (10) and (11) are provided on the semi-working side. Each is bulging. These support shafts 10 and 11 are fitted into the support holes 1a formed in the transition carriages with a margin. Then, when the movement in the slide direction Y intersecting in the cloth feeding direction is given to the left and right feed teeth (2) and 3 by the left and right moving means (not shown), the left and right feed teeth (2) and (3) are supported by the support holes (1a). Or it is guided to the feed dog guide groove 9, and moves in the slide direction Y.

However, in the case of fabric feeding spaced from side to side by the cloth feeding device of this kind of sewing machine, the normal flat sewing is not a problem, but it is not applicable when the seam is formed over the ends while matching the ends of two pieces of fabric. .

In addition, one side of the left and right feed teeth (4) (5) is fixed to one gripping portion (6) (7), the other end side is supported by the other gripping portion (6) (7). One support structure of the left and right feed teeth 4 and 5 is likely to lack rigidity when the load from the upper portion is large. And when the displacement by a load generate | occur | produces in the feed dog left and right, there exists a possibility that the straightness of a cloth may be impaired.

The present invention has been made to solve the above problems, and a first object of the present invention is to provide a cloth transfer apparatus for a sewing machine that enables sewing to be sewn over the left and right ends of two pieces of cloth.

It is also a second object of the present invention to provide a cloth transfer device of a sewing machine that can adjust the amount of movement in the slide direction of the left and right feed teeth or change the state of movement.

In addition, it is a third object to maintain the straightness of the cloth by appropriately arranging the linear feed dog moving in the vertical direction and the horizontal motion in addition to the feed teeth moving in the slide direction.

In order to solve the said subject, invention of Claim 1 is

Left and right feed teeth (27, 28, 65, 66) consisting of right feed teeth and left feed teeth divided along the cloth feed direction,

A feeder 20 for supporting the left and right feed teeth so as to be movable in a direction crossing the cloth feed direction;

Shanghai east means 35 for imparting movement in the vertical direction to the left and right feed teeth,

Horizontal movement means (38) for imparting horizontal movement to the left and right feed teeth;

In the cloth transfer device of the sewing machine having a left and right moving means (51, 63, actuator) capable of imparting the movement in the slide direction intersecting the cloth feeding direction to the left and right feed teeth,

The left and right movement means gives a movement in the slide direction so that the left and right feed teeth approach each other when the left and right feed teeth are on the needle plate, the movement in the slide direction to space the left and right feed teeth apart from each other when the left and right feed teeth are under the needle plate. And to operate.

According to the invention of claim 1, the sewing forming the seam over the left and right ends of the two fabrics can be neatly finished by applying the movement in the slide direction of the left and right feed teeth so as to approach the needle during the transfer. .

The invention of claim 2 is

A plurality of support shafts 29a, 29b, 67, 68 fixed to the left and right feed teeth and arranged along the slide direction;

In order to support the support shaft so as to be movable separately in the slide direction, a plurality of support holes 21c, 21d, 21m, and 21n formed on both sides of the transport direction in the slide direction were provided.

According to the invention of the second aspect, it is possible to achieve miniaturization of the apparatus without lengthening the slide direction length h of the cloth transfer table, and at the same time, to transfer the sewing machine to prevent the occurrence of rattling when the left and right feed teeth move in the slide direction. An apparatus is provided.

The invention of claim 3 is

The left and right moving means,

An upper and lower body 44 supported to be slidable along the vertical direction;

Left and right feed tooth links 45 and 46 having one end connected to the upper and lower bodies and the other end connected to the left and right feed teeth;

It has a plurality of connecting pins (47, 48, 49) for connecting the left and right feed teeth link and the upper and lower bodies or the left and right feed teeth, and at least one of these connecting pins as an eccentric pin (70, 71, 72) Cloth transport apparatus of the sewing machine, characterized in that to maintain at a predetermined position.

According to the invention of claim 3, the position of the left and right feed teeth can be finely adjusted by changing the fixing position of the eccentric pin and holding it at a predetermined position. For this reason, the movement of the slide direction which is more optimal in consideration of the balance of the feed dog left and right can be given.

The invention of claim 4,

Left and right feed teeth (27, 28, 65, 66) consisting of right feed teeth and left feed teeth divided along the cloth feed direction;                     

A feed table (1, 20) for supporting the left and right feed teeth so as to be movable in a direction crossing the cloth feeding direction;

Shanghai moving means 35 for imparting the movement in the vertical direction to the left and right feed teeth through the cloth transfer band,

Horizontal movement means (38) for imparting horizontal movement to the left and right feed cogs through the cloth feeder;

In the cloth transfer device of the sewing machine having a left and right moving means (51, 63, actuator) capable of imparting the movement in the slide direction intersecting the cloth feeding direction to the left and right feed teeth,

The left and right moving means,

And the upper and lower body 44 which is supported to be movable along the up and down direction while giving a movement in the up and down direction,

One end side is connected to the upper and lower bodies, and the other end side is connected to the left and right feed teeth (45, 46),

The phase change means 40, 75, 76, 77, 78, 79, 63, 60 which changes the phase of the upper and lower bodies with respect to the shanghai-dong phase of the said conveyance bar was set as the structure.

According to the invention of claim 4, the phase shifting means changes the phase of the upper and lower bodies with respect to the shanghai-dong of the conveying table so that the movement in the slide direction of the left and right feed cogs at the time of the cloth transfer is approached (clothed) or from the needle. It can be spaced apart (tensioning the fabric), eliminating the movement in the slide direction (no stretching action to the fabric). Therefore, the optimum movement can be given in accordance with sewing conditions by adjusting the phase change means.

The invention of claim 5 is

Feed trays 1 and 20 for movably supporting the slide feed tooth 88 in a direction intersecting the cloth feed direction, and Shanghai moving means for imparting a vertical movement to the slide feed tooth through the feed table ( 35), horizontal movement means 38 for imparting horizontal movement to the slide feed tooth through the feed table, and left and right to impart movement in one direction crossing the cloth feed direction to the slide feed tooth. The moving means 51, 63 (actuator) and the linear feed tooth 87 which provide the up-and-down movement and the horizontal movement by the shank conveyance axis and the horizontal conveyance axis | shaft were arrange | positioned at the one direction side of the said slide conveyance tooth.

According to the invention of claim 5, sewing with straight stability can be performed while holding the sewing material in one side direction. In particular, when the fabric pressing section is provided with a guide (wall) for guiding the fabric along the sewing direction, the guide is automatically followed by the end of the fabric, thereby improving the quality of the sewing product.

First, a first embodiment of the present invention will be described with reference to FIGS. 1 to 6.

The feed table 20 is composed of a main body portion 21 extending in the inverse U-shape as viewed from the side and extending along the cloth transfer direction X, and an L-shaped arm portion 22 extending downward from the main body portion 21. . The main body portion 21 of the carriage is formed with a quadrangular mounting hole 21a at the rear side (semi-worker side), and a supporting hole along the Y-direction that is perpendicular to the transfer direction so as to penetrate the mounting hole 21a. 21c and 21d are formed in parallel (opposite). Moreover, the recessed part 21b is formed in the front (worker side) of the main-body part 21 of a conveyance base. The support plate 25 is fixed to this recess 21b upper part, and the slide rail (engagement means) 26 is formed by this support plate 25 and the recessed part 21b.

The feed tooth is composed of a right feed tooth 27 and a left feed tooth 28 divided into two along the cloth feed direction.

The right feed tooth 27 is comprised from the tooth | gear part 27a and the right gripping part 27b of a U-shape by the plane which hold | maintains both ends of the tooth | gear part 27a. The right gripping portion 27b is placed on the upper flat surface of the right feed tooth 23 and is fixed by a screw (not shown). Long sides are arranged along the transition direction X. The right feed tooth 23 is composed of the front (worker side) slide portion 23a and the rear support portion 23b. The fitting hole 23c is formed in the side surface of the support part 23b along the slide direction Y (direction to go straight to a cloth conveyance direction). In addition, an incision hole (incision) 23d is formed close to the fitting hole 23c. Further, two projection-like connecting portions 23e and 23e are disposed on the bottom surface of the support portion 23b along the Y direction.

Similarly, the left feed tooth 28 is composed of a toothed portion 28a, a left grip portion 28b, a fitting hole 24c formed in the left grip portion, and an incision hole (cutout portion) 24d, and a grip portion 28b. Is fixed to the feed tooth 24.

The left and right feed teeth 23 and 24 set in the mounting hole 21a of the feeder 20 are respectively right support shafts 29a and left support shafts with respect to the support holes 21c and 21d of the feeder side. 29b is inserted. The inserted right support shaft 29a and the left support shaft 29b are respectively fixed by screws (not shown) at predetermined positions through the fitting holes 23c and 24c of the left and right feed cog.

The right support shaft 29a is supported by the support hole 21c formed along the slide direction Y, and the left support shaft 29b is supported by the support hole 21d so that both ends may freely slide. In correspondence with the portion into which the right support shaft 29a is inserted, the left feed tooth 24 is provided with an incision hole (incision) 24d. In correspondence with the portion into which the left support shaft 30 is inserted, a right hole 23 is formed in the right feed tooth 23.

As is well known, the bottom side of the sewing machine bed is disposed along the Y direction, the shanghai transport shaft 30, the horizontal feed shaft 31. Shanghai Song cam 32 is fixed to the tip of the Shanghai song shaft (30). The projection part 32a of the shanghai song cam 32 is connected to one end of the shanghai songlink 33, and the other end side of the shanghai songlink 33 is connected to the arm part 22b of the transport table through the shaft 34. When the sewing machine is driven and the Shanghai feed shaft 30 is rotated, the feeder 20 and the left and right feed teeth 27 and 28 move through the Shanghai Song Cam 32, the Shanghai Song Link 33, and the shaft 34. . These Shanghai Song Shaft 30, Shanghai Song Cam 32, Shanghai Song Link 33, the shaft 34 constitutes the Shanghai East means (35).

The horizontal transfer shaft 31 reciprocates in conjunction with the sewing machine driving by a known horizontal transfer mechanism (not shown).

The left end of the horizontal transfer shaft 31 is fixed to the lower end of the horizontal transfer arm 36. The upper end of the horizontal transfer arm 36 is connected to the rear end of the feed table (1) to rotate freely through the shaft (37). When the sewing machine is driven and the horizontal feed shaft 31 reciprocates, the feed table 20 and the left and right feed teeth 27 and 28 move horizontally through the horizontal feed arm 36 and the shaft 37. Reciprocate along The horizontal transfer shaft 31, the horizontal transfer arm 36, and the shaft 37 constitute the horizontal transfer means 38.

An eccentric cam 40 is fixed to the shanghai pine shaft 30. The eccentric cam 40 is connected to the left and right transport link 41. The free end side of the left and right transfer link 41 is connected to the linking arm 42a of the linking body 42 by the shaft 41a. The c-shaped interlocking body 42 is one linking arm 42a and one bearing portion 42b of the projection part which is rotatably supported by the horizontal feed shaft 31. The bearing part 42b fixes the one end side of the shaft 43 by the screw which is not shown in figure. The other end side of the shaft 43 is fitted with a long hole 44c of the upper and lower bodies formed along the X direction.

The upper and lower bodies 44 are a box-shaped body portion 44a, a angular protrusion 44b formed on the right side of the body portion, and a pair of arc-shaped protrusions 44d protruding on the upper portion of the body portion in parallel along the slide direction Y ( 44e), a through hole 44f formed along the slide direction Y, and an elongated hole 44c formed along the slide direction Y and whose long axis is coincident with the transition direction X. As shown in FIG.

One end side of the left and right feed tooth links 44 and 45 disposed between the pair of arc-shaped protrusions 44d and 44e is rotatably supported by the shaft 47 supported by the arc-shaped protrusion. And the other end side of the right feed gear link 45 is arrange | positioned between a pair of connection part 23e (23e) of the right feed gear, and is connected to the right feed gear 23 by the pin 48 so that rotation is possible. The other end side of the left feed toothed link 46 is disposed between the pair of connecting portions 24e and 24e of the left feeder toothed, and is pivotally connected to the left feeder tooth 24 by a pin 49.

The angular protrusions 44b of the upper and lower bodies 44 are fitted to the vertical grooves 22a formed in the lower portion of the arm portion 22 with ease, and are supported to move freely along the vertical direction. In addition, the L-shaped guide member 50 has a bent end side fitted into the through groove 44f of the upper and lower bodies, and the other end side is fixed to the side of the arm 22 by a screw (not shown). In this way, the upper and lower bodies 44 are supported by the vertical grooves 22a and the guide member 50 to move freely along the vertical direction.

When the sewing machine is driven and the Shanghai feed shaft 30 rotates, the upper and lower bodies 44 reciprocate along the vertical direction through the left and right transfer links 41, the linkage 42, and the shaft 43. The reciprocating movement of the upper and lower bodies 44 imparts a movement in the slide direction Y which is perpendicular to the transfer direction to the left and right feed teeth 23 and 24 via the left and right feed teeth links 45 and 46. These shanghai conveying shaft 30, the linkage body 42, the shaft 43, the upper and lower body 44, the left and right feed tooth links 45, 46 and the like constitute a left and right moving means 51.

The left and right feed teeth 27 and 28 are slidably supported by the feed table 20 in the slide direction, and are connected to the upper and lower bodies 44 constituting the left and right moving means. And the difference between the up and down motion vector (electron) of the upper and lower body 44 provided by the left and right moving means 51 and the up and down motion vector (the latter) of the feed table 20 provided by the shank moving means 35. (Relative amount) imparts movement in the slide direction to the left and right feed cogs. If the difference between the motion vector of the former and the latter is 0, the motion in the slide direction of the feed dog is 0. In the case of ascending (momentum of the feeder 20)> (momentum of the upper and lower bodies 44), the movement in the sliding direction of the left and right feed cogs is a direction of approaching the needle (reducing the cloth or touching the cloth). In addition, in the case of ascending (momentum of the feeder 20) <(momentum of the upper and lower bodies 44), the movement of the left and right feed teeth in the sliding direction is the direction of separation from the needle (the action of tightening the cloth).

As shown in Fig. 2, the left and right feed cogs 23 and 24 after assembly are set in the mounting holes 21a, and the left and right support shafts 29a and 29b fixed to the respective feed cogs are supported along the slide direction Y. It is supported to be slidable to the holes 21c and 21d. In addition, the slide portions 23a and 24a of the feed teeth are slidably supported along the slide direction Y by the slide rails (coupling means) 26. In addition, when the movement of the left and right conveying teeth between each other by the left and right moving means 51 is given to each other, the right conveying tooth side wall 23f and the left conveying tooth side wall 24f are respectively equipped with mounting holes of the feed carrier. It contacts the side walls 21e and 21f. The mounting hole sidewalls 21e and 21f have a stopper function for locking the left and right transfer toothed teeth 23 and 24.

As shown in Figs. 2 to 6, the teeth of the left and right feed teeth 27 and 28 are fixed at both ends thereof by the respective grip portions 27b and 28b. For this reason, it has rigidity with which the load from an upper surface can be matched. Therefore, even when a large load is applied to the feed tooth from the upper side when the cloth is sent, the feed tooth is not inclined so that the straightness of the cloth is maintained. In the state where the device is assembled, the grip portions 27b and 28b of the left and right feed cogs are arranged so as to overlap each other with a predetermined gap J. The reinforcing rib 27ba protrudes from the gripping portion 27b on the left end side, and the reinforcing rib 28ba protrudes from the holding portion 28b on the right end side, respectively. For this reason, the side shape of a grip part is L shape and inverted L shape.

As described above, since the holding portions 27b and 28b do not wear out, the life of the apparatus is improved, and since the reinforcing ribs are arranged, the rigidity can be increased without taking up more space.

The operation of the first embodiment will be described.

When the sewing machine is driven to rotate the Shanghai Song Shaft 30, the Shanghai Song Cam 32 gives the movement of the up and down direction to the feed table 20 through the Shanghai Song Link 33. In addition, the horizontal feed shaft 31 is rotated (swayed) by a horizontal feed drive mechanism (not shown), and the horizontal feed shaft 31 rotates horizontally to the feed table 20 through the horizontal feed arm 36. Give exercise. By the movement in the vertical direction and the horizontal direction of the feed table 20, the left and right feed teeth 27 and 28 perform the vertical movement and the horizontal movement as in the prior art.

In this embodiment, the eccentric cam 40 rotates by the rotation of the shanghai pine shaft 30. Accordingly, the shaft 43 swings around the horizontal transfer shaft 31 through the left and right transfer links 41 and the linkage 42. And the movement of the shaft 43 by the long hole 44c of the upper and lower body 44 transmits only the vertical movement of the shaft 43 to move the upper and lower body 44 up and down. At this time, the upper and lower body 44 is supported by the vertical groove (22a) and the guide member 50 to move freely only in the vertical direction, so it smoothly reciprocates in the vertical direction.

When the lift amount of the upper and lower bodies 44 is larger than the lift amount of the feed table 20, the left and right feed teeth (23, 24) through the shaft 47, left and right toothed tooth links 45, 46 and left and right toothed teeth ( 27) 28 respectively move in a direction away from the needle and act to tension the fabric. And each support shaft 29a, 29b fixed to the left-right feed tooth 23 and 24 is supported so that it may slide freely in the support hole 21c, 21d formed in the feed stand. In addition, the slide portions 23a and 24a of the left and right feed teeth are slidably supported by the guide groove 26. For this reason, the left and right feed cogs 23 and 24 move smoothly along the slide direction Y.

When the lowering amount of the upper and lower bodies 44 is larger than the lowering amount of the conveying table 20, the left and right conveying through the shaft 47, the left and right feed tooth links 45, 46 and the left and right feed teeth 23, 24 The teeth 27 and 28 move to approach along the slide direction, respectively, to access the needle.

The movement in the slide direction of the left and right feed cogs 27 and 28 is a direction away from the needle from when the needle tip comes out of the cloth (when the cloth feed in the cloth feed direction by the left and right feed cogs 27 and 28 starts). The movement of is started, and the movement in the direction of approaching the needle is set to start from when the needle is inserted into the cloth (when the cloth transfer by the left and right feed teeth 27, 28 ends). This is set by the mounting angle of the eccentric cam 40 with respect to the vertical axis feed shaft 30. And during the cloth transfer, the movement of the slide direction Y of the left and right feed teeth 27 and 28 becomes a combined motion of the vertical movement of the left and right feed teeth 27 and 28 and the movement in the horizontal direction, and the cloth is left to right from the needle. It is sent in the direction of the cloth transfer direction X while extending in the transverse direction under the action of the direction away from the. For this reason, when the cloth feed apparatus of the first embodiment is used for a zigzag sewing machine or a camouflage sewing machine that is susceptible to sewing wrinkles (called perkering), there is little occurrence of perkering.                     

According to the first embodiment, the plurality of support shafts 29a and 29b and the support shafts 29a and 29b which are fixed to the left and right feed teeth 27 and 28 individually and arranged along the slide direction are slid. Since the support holes 21c and 21d are formed at both ends of the slide table in the slide direction so as to be movable individually along the direction Y, the slide direction length h of the transfer carriage is set to be provided. It is possible to achieve miniaturization of the cloth feed device without lengthening, and at the same time, the occurrence of rattling is prevented during the movement of the left and right feed teeth in the slide direction, and reliably percussion is prevented.

In the transfer table, a slide rail capable of guiding the left and right feed teeth 27 and 28 in the slide direction Y and regulating in the vertical direction at a position separated by a predetermined amount from the support hole 21c and 21d in the transfer direction X is provided. Since the structure having the coupling means 26 is achieved, miniaturization of the cloth transfer apparatus can be achieved, and the occurrence of rattling during the movement of the left and right feed teeth in the slide direction is prevented and the percussion is surely prevented.

In addition, since one side of the left and right feed teeth has a configuration having cutouts 23d and 24d for freely moving the support shaft fixed to the other feed teeth, the support shaft is arranged without being separated from the feed teeth so that the support shaft is sewing machine. There is no fear of interfering with the drum, drum, etc., and the fabric feeder can be miniaturized.

At the base of the feeder, an angular mounting hole 21a for mounting the left and right feed teeth is formed, and the left and right feed teeth 23 and 24 are locked to the side wall portions 21e and 21f of the angular mounting holes. Since it is possible to configure the side wall of the feeder 1 as a stopper function of the left and right feed tooth, the cloth feeder can be further miniaturized.                     

In addition, since the teeth 27 and 28 of the left and right feed cogs are configured to be fixed at both ends by the gripping parts 27b and 28b, the left and right feed cogs have a rigidity that can withstand the load from the upper surface thereof. As a result, the straightness of the cloth is maintained.

Moreover, since the holding parts of the left and right feed teeth or the holding parts having the ribs are arranged to overlap with a predetermined gap j, the holding parts are not worn, so the life of the apparatus is improved.

Next, 2nd Embodiment of this invention is described based on FIG.

The second embodiment is different from the left and right moving means in the first embodiment. The other same thing is attached | subjected with the same code, and the description is abbreviate | omitted.

The left and right moving means 63 is fixed to a motor 61 fixed to the sewing machine frame, a rocking plate 62 fixed to the output shaft of the motor 61, and one end of which is spaced apart from the rotation center of the rocking plate 62. At the same time, the other end is constituted by a shaft 43 that is fitted with a long hole 44c of the upper and lower bodies 44.

When the motor 61 rotates, the rocking plate 61 and the shaft 43 swing, and the upper and lower bodies 44 move in the vertical direction. As described in the first embodiment, the left and right feed tooth links 45 and 46 are opened and closed by the relative movement between the shanghai dong of the upper and lower bodies 44 and the shanghai dong of the feed table 20, and the left and right feed cogs 27 ( And move 28) in the Y direction.

The motor 61 is connected with a controller (control means) 60 for controlling the rotation of the motor 61. The control means 60 has a CPU, a ROM, and a RAM therein, and a needle position signal for detecting the top and bottom positions of the sewing needle, and an input constant stage which can be arbitrarily set by the operator by the key switch are connected to the CPU input side. . After these input signals and data are calculated by the CPU, drive signals are output to the motor 61 through the driver circuit. By this drive signal, the left and right feed teeth 27 and 28 can be folded or separated in the Y direction.

Then, at the time of the transition by the needle position signal, the motor 61 is rotated clockwise from the initial position in a predetermined amount (so that the amount of rise of the upper and lower bodies 44 is larger than the amount of rise of the carriage 20), and the left and right feed cogs 27 are rotated. Separate 28 from the Y direction. Thereafter, starting from the end of the cloth transfer, the motor 61 is rotated counterclockwise and returned to the initial position to move the left and right feed teeth 27 and 28 in the Y direction to return to the initial position. By moving the left and right feed teeth 27 and 28 in the slide direction, a seam without percussion is formed.

On the contrary to the above control, the motor 61 is rotated clockwise from the initial position in a predetermined amount (so that the rising amount of the upper and lower bodies 44 becomes smaller than the rising amount of the conveying table 20), and the left and right feeding teeth 27 ) (28) in the Y direction (cloth). Thereafter, the motor 61 may be controlled to return to the initial position by rotating the motor 61 counterclockwise from the end of the cloth transfer. Since the fabric is sewn on the inside while being controlled by this control, there is an effect of preventing the opening of the fabric (to prevent misalignment between the cloths when the fabric is sewn together).

In addition, during the transfer, it is possible to set the lift amount and the speed of the transfer table 20 and the upper and lower bodies 44 to be the same, and not to move the feed teeth in the slide direction.

As described above, the left and right moving means 63 composed of these motors 61 and the like, and the controller (control means) 60 for controlling the motor 61 constitute a phase change means. The phase changing means changes the phase of the upper and lower bodies 44 with respect to the shanghai movement of the conveyer 20, and moves the slide direction of the left and right feed teeth close to the needle during cloth transfer to make the fabric taut or separated from the needle. You can do it or get rid of it. Therefore, by adjusting the phase changing means, it is possible to give an optimum slide direction movement in accordance with sewing conditions.

Next, 3rd Embodiment of this invention is described based on FIG.

The third embodiment differs from the first embodiment in the support structure of the left and right feed teeth. The same thing is attached | subjected to the same thing and the description is abbreviate | omitted.

The right and left feed tooth is composed of a right feed tooth 65 and a left feed tooth 66 divided into two along the cloth feed direction.

The right feed tooth 65 is comprised from the tooth | gear part 65a and the planar L-shaped right holding part 65b which hold | maintains one end side of a tooth | gear part. The right end portion 65b is placed on the upper flat surface of the right feed tooth 23 and is fixed by a screw (not shown). Similarly, the left feed tooth 66 is composed of a tooth 66a and a left grip 66b, and the left grip 66b is placed on the upper flat surface of the left feed tooth 24 to be fixed by screws (not shown). do.

The left and right feed teeth 65 and 66 mounted on the feed table 20 are connected to the upper and lower bodies 44 and the upper and lower shafts 30 through the left and right feed teeth links 45 and 46. And the other end side tooth surface 65aa of the right feed tooth is supported by the holding part 66bb of the left feed tooth. The other end side tooth surface 66aa of the left feed tooth is supported by the grip portion 65bb of the right feed tooth. In other words, the free end side of the left feed tooth is supported by the gripper of the right feed tooth, and the right feed tooth free end side is supported by the gripper of the left feed tooth.

Similarly to the first embodiment, the third embodiment can achieve miniaturization of the cloth transfer device, and at the same time, the occurrence of rattling is prevented during the movement of the left and right feed teeth in the slide direction, and reliably percussion is prevented.

Next, 4th Embodiment of this invention is described based on FIG.

In the fourth embodiment, the shape of the support shaft and the support hole for guiding the left and right feed teeth in the slide direction is different from that in the first embodiment. The same thing is attached | subjected to the same thing and the description is abbreviate | omitted.

Angle pins 67 and 68 are individually fixed to the left and right feed cogs 23 and 24 along the slide direction. In addition, holes 21m and 21n in two directions penetrating along the slide direction are formed on the side surface of the transfer table 20. Each of the holes 21m and 21n slidably supports the respective pins 67 and 68 separately. According to the fourth embodiment, the occurrence of rattling is more surely prevented.

Next, a fifth embodiment of the present invention will be described with reference to FIGS. 12 to 15.

The fifth embodiment has a connecting pin for connecting one end side of the upper and lower bodies 44 and the left and right feed tooth links 45 and 46, and the other end side of the left and right feed tooth links 45 and 46 as compared with the first embodiment. It is different in that it uses an eccentric pin to the connecting pin connecting the left and right feed teeth (23, 24). In addition, the structure of the shanghai pine shaft 30 and the eccentric cam 40 fixed thereto will be described in more detail. The other same thing is attached | subjected with the same code, and the description is abbreviate | omitted.

First, the eccentric pin will be described. Eccentric pin support holes 44da and 44ea are formed in the arc-shaped protrusions 44d and 44e of the upper and lower bodies 44 in FIG. 12 along one axis line parallel to the X direction. The eccentric pin 70 has a concentric front support part 70b, a rear support part 70a, and an eccentric part 70c eccentric with respect to both support parts between both support parts. Both support portions 70a and 70b are rotatably supported by support holes 44da and 44ea of the upper and lower bodies, respectively. Further, both ends of the left and right feed toothed links are attached to the eccentric portion 70c. When the eccentric pin 70 is rotated, the left and right feed teeth 27 and 28 are moved in the slide direction through the left and right feed tooth links 45 and 46, and the balance thereof can be adjusted. After this adjustment, the eccentric pin 70 is fixed at a predetermined position by screws or nuts not shown.

The left and right eccentric pins 71 and 72 have the same configuration as the eccentric pin 70 described above. The post core pin 71 is rotatably supported at both of the support portions 71a and 71b at the connecting portion 23e of the right feed tooth, and the left eccentric pin 72 is also rotated at the connecting portion 24e of the left feed tooth. Possibly supported. The post core pin 71 adjusts the slide direction initial position of the right feed tooth 27 via the right feed tooth 23 by the rotation. It is fixed at a predetermined position by screws or nuts (not shown). Similarly, the left eccentric pin 72 is rotatably supported by the connecting portion 24e of the left feed tooth, and sets the initial position in the slide direction of the left feed tooth.

In the fifth embodiment, the relative positions of the left and right feed teeth are adjusted using three eccentric pins 70, 71 and 72, but at least one eccentric pin is used to change the relative positions of the left and right feed teeth, and the It is also easy to give a motion in the slide direction. In addition, although the upper and lower bodies 44 of this embodiment connected two links in V shape, it is also easy to use four eccentric pins instead of parallel connection.

Next, a description will be given of the combined structure of the Shanghai Song Shaft and the eccentric cam.

The eccentric cam 75 of FIG. 14 describes the eccentric cam portion 40 of FIG. 12 in detail and includes a cylindrical body portion 75a and a cam portion 75b formed on the outer circumference of the body portion. The outer circumference 75b of the eccentric cam 75 fits into the connection hole 41b of the left and right transfer link 41. The cylindrical body portion 75a is rotatably supported by the shanghai pine shaft 30 after passing through the shanghai pine shaft 30. And the worker 76 fixes the eccentric cam 75 at a predetermined position by the screw 76.

As described above, the movement in the slide direction of the left and right feed cogs is a relative motion generated by the relationship between the shanghai dong of the upper and lower bodies 44 and the shanghai dong of the feed table 20. When the fixed position is changed by rotating the eccentric cam 75, the shanghai phase of the upper and lower bodies 88 is changed with respect to the conveyer 20 moving in a certain cycle by the shanghai pine shaft 30. For this reason, the movement of the left-right feed teeth 23 and 24 in the slide direction changes.

For example, in the present invention, when the eccentric amount and the phase of the eccentric cam 75 are fixed so that the upper and lower amounts and the phases of the pin 43 match the upper and lower amounts of the feed table 20, the left and right feed teeth 23 and 24 may be fixed. The movement in the slide direction does not occur. In this state, when the eccentric cam 75 is rotated and fixed about 45 degrees in the counterclockwise direction, the left and right feed cogs move in the direction away from the needle during fabric transfer, and the fabric is tightened. In addition, when the eccentric cam 75 is rotated and fixed by about 45 degrees in the clockwise direction, the left and right feed teeth move in the direction of approaching the needle during the cloth transfer, and the cloth is placed inside. In this way, the eccentric cam 75 and the screw 76 constitute a phase change means for changing the phase of the upper and lower bodies 44 with respect to the shank phase of the feed table 20.

Next, 6th Embodiment of this invention is described based on FIG. 15, FIG.

The sixth embodiment differs from the fifth embodiment in the structure of the eccentric cam.

15 is fixed to the shanghai pine shaft 30 of FIG. 15, the long side of which is disposed in the horizontal direction in a rectangular shape as viewed from the front. The adjuster 78 is circumferentially arranged in parallel with the axis of the upper and lower shafts 30 and the axis of the adjuster 78. The adjuster 78 is formed with a groove 78a along the horizontal direction at a position shifted from the center of the diameter by a predetermined amount. The outer shape 78c of the adjuster 78 fits into the connection hole 41b of the left and right transfer link 41.

The groove 78a of the adjuster is formed with a penetrating long groove 78b. In addition, the adjustment groove 78a is slightly wider in the vertical direction than the adjustment bar 77. For this reason, when the adjuster 78 is mounted to the adjuster 77, the adjuster 78 is slidably supported along a horizontal direction, and is fixed by the screw 79 at a predetermined position.

16 is an explanatory diagram of a state change of the adjustment position.

(A) is the case where the outer diameter reference center line P of the adjuster 78 is collinear with respect to the vertical axis Q of the Shanghai concentric axis Q. It is a case where it arrange | positions to a right direction (b), and the case of the left direction with respect to P is (c).

In the adjustment position of (a), it is set as a reference position in which the upper and lower bodies 44 and the movement table in the up-down direction coincide with the phase. For this reason, when the adjuster 78 is fixed to the adjuster 77 at the position of (a), and the shanghai conveying shaft 30 and the left and right conveying link 41 are connected, the slide direction of the left and right feed teeth 23 and 24 is carried out. Does not happen exercise.

In the adjustment position of (b), the left and right feed teeth move in the direction of approaching the needle during the cloth transfer, and place the cloth inside.

In the adjustment position of (c), the left and right feed teeth move in the direction away from the needle during the cloth transfer, and the fabric is pulled. Moreover, in (b) and (c), the distance of the straight line Q falls with respect to the straight line P, and the momentum of the sliding direction of the left-right feed tooth becomes large. In this way, by changing the fixed position of the adjuster 78, the phase and the amount of motion of the upper and lower bodies with respect to the shankdong phase of the feed table 20 is changed. These adjusters 78, adjusters 77, and screws 79 constitute a phase change means.

Next, the seventh, eighth, and ninth embodiments of the present invention will be described with reference to FIGS. 17 to 19.

The seventh, eighth, and ninth embodiments have a straight feed tooth for horizontal movement in addition to the conventional vertical and vertical feed teeth for providing movement in the slide direction (direction intersecting in the cloth feed direction). It is a modification of the cloth feed apparatus.

In the seventh embodiment of Fig. 17, the feed dog 82 is moved straight along the cloth feed direction on both sides of the left and right feed cogs 80 (right feed cogs) and 81 (left feed cogs) which impart the movement in the slide direction. 83) is disposed. These left and right feed cogs 80 and 81 are oblique cogs of 八 shape symmetrical along the cloth feed direction. Further, the straight feed teeth 82 and 83 are fixed to the feed table 20 to perform the conventional vertical movement and the horizontal movement. Since the feed teeth are arranged in this manner, the fabric is kept straight by the straight feed teeth 82 and 83 even when the fabric is tense or approaches by the left and right feed teeth 80 and 81. In addition, since the left and right feed teeth are oblique teeth, the retaining force in the left and right directions is improved, and the action to the cloth becomes effective.

In the eighth embodiment of Fig. 18, the left and right feed cogs 84 (right feed cogs) and 85 (left feed cogs) are arranged to impart the movement in the slide direction on the upstream side in the cloth feed direction as shown in the figure. The straight feed tooth 86 was arrange | positioned in the downstream direction. And the needle drop point is set between the left and right feed teeth and the straight feed teeth. For this reason, even if the fabric before sewing is stretched or touched (reduced), the sewing straightness (after the needle drop point) is sent by the straight feed teeth 86, so that the straightness of the fabric is stabilized. In addition, since the left and right feed cogs 84 and 85 are made of octagonal bevel teeth symmetric along the cloth feed direction, the cloth holding force in the left and right directions is improved and the action to the cloth becomes effective.

In the ninth embodiment of Fig. 19, a straight feed tooth 87 is disposed on the right side and a slide feed tooth 88 is disposed on the left side in the cloth feeding direction. The slide feed teeth 88 are fixed to one side of the left and right feed teeth 23 and 24 that slide by the left and right moving means described above. In addition, in the right direction in which the slide feed tooth 88 imparts motion, a straight feed tooth 87 is arranged to impart an up and down motion and a horizontal motion by the shank and the horizontal feed axis. Moreover, this left and right feed tooth 88 is an oblique tooth inclined toward a cloth feed direction. In this configuration, since the straight feed tooth 87 is arranged in the facing direction even if the slide feed tooth 88 faces the straight feed tooth 87, the straightness of the cloth is stabilized. In particular, when a guide for guiding the cloth is arranged along the sewing direction along the sewing direction, the cloth is automatically followed by the guide, thereby improving the quality of the sewing product.

This invention is not limited to the said embodiment, It can change variously.

For example, in the first embodiment, ribs are disposed on the left and right feed teeth 27 and 28, the right feed teeth 27 are inverted L-shape from the side, and the left feed teeth 28 are L-shape from the side. It was possible to obtain the rigidity of the feed tooth without taking a space in the shape. Instead, as shown in FIG. 10, the right feed tooth 27 is L-shaped as viewed from the side, and the left feed tooth 28 can be easily considered as an inverted L-shaped as viewed from the side. Also, the right feed teeth are U-shaped when viewed from the side and the left feed teeth are inverted U-shaped when viewed from the side, or the right feed teeth are U-shaped when viewed by the side and T-shaped, and the left feed teeth are seen as U-shaped. It is also easy to think of forming the ribs differently from each other or diagonally when viewed from above.

In the first embodiment, the left and right moving means 51 which can give the left and right feed teeth 27 and 28 in the slide direction intersecting in the cloth feeding direction are the Shanghai feed shaft 30 and the linkage 42. ), Shaft 43, upper and lower body 44, left and right feed tooth links 45, 46 and the like.

Alternatively, the left and right movement means may be easily configured by two cylinders fixed to the carriage along the slide direction Y and the left and right transfer teeth 23 and 24 connected to the rod of the cylinder. That is, by controlling several cylinders in synchronization with the vertical movement of the left and right feed cogs, percussion can be prevented by separating and approaching the right and left feed cogs.

In the second embodiment, although a motor is used as the left and right moving means, it is also easy to use one electron cylinder instead. In other words, the rod of the electronic cylinder is fixed to the sewing machine frame to face vertically upward, and connects the rod and the upper and lower bodies 44. The percussion can be prevented by allowing the electronic cylinder to approach and move the left and right feed teeth through the upper and lower bodies 44 and the like by using the shanghai copper. The motor, the electron cylinder, the pneumatic cylinder, and the like are collectively referred to as an actuator.

Moreover, in the said embodiment, although the slide direction Y used only the direction which goes straight to the cloth conveyance direction, it is also easy to think that the slide direction may make the conveyance direction left and right reverse to the cloth conveyance direction. These directions and the like are generically referred to as directions crossing the cloth feed.

In addition, it is also conceivable to control so as not to move the left and right feed teeth in the slide direction at the time of reverse transfer by using a phase change means such as the motor.

In addition, even if the feed teeth 4, 5 and the gripping portion 6, 7 of the conventional feeder of Fig. 11 are replaced with the feed teeth 27, 28 of the first embodiment, the rigidity of the left and right feed teeth is It is also easy to think of the rising and no wear or the like between the feed teeth.

In the above embodiment, one support shaft is fixed to each of the left and right feed cogs, but instead, two support shafts are fixed to the left and right feed cogs and four support holes corresponding to the support axes can be easily considered.

In the above embodiment, the upper and lower bodies 44 and the left and right feed teeth 23 and 24 are connected by left and right feed teeth links 45 and 46, and the connecting shape is V-shaped, but it is also a parallel link shape. I can think of it easily.

In addition, the phase change means of the said embodiment used the eccentric cam 75, the adjuster 77, and the adjuster 78 for the connection of the shank | shaft feed shaft 30 and the left-right feed link 41. As shown in FIG. Alternatively, it is also easy to use the phase change means at the connection portion between the shanghai song shaft 30 and the shanghai song cam 32.

According to the invention of claim 1 as described above, the occurrence of rattling is prevented when the left and right feed teeth move in the slide direction without lengthening the length of the supporting hole or the length of the slide direction in the slide direction h. And there is provided a conveying device of the sewing machine to prevent perkering.

According to the invention of claim 3, the position of the left and right feed teeth can be finely adjusted by changing the fixing position of the eccentric cam and fixing it at a predetermined position. For this reason, the movement of the slide direction which is more optimal in consideration of the balance of the left-right feed dog can be given.

According to the invention of claim 4, the phase shifting means changes the phase of the upper and lower bodies with respect to the shanghai-dong of the needle bar to move the movement of the left and right feed teeth in the slide direction during the cloth transfer to the needle (reduce the cloth), or from the needle. It can be spaced apart (tensioning the fabric), eliminating the movement in the slide direction (no stretching to the fabric). Therefore, the optimum movement can be given in accordance with sewing conditions by adjusting the phase change means.

According to the invention of claim 5, sewing can be performed with straightness stability while the sewing material approaches in the left and right directions.

Claims (5)

Left and right feed teeth composed of right feed teeth and left feed teeth divided along the cloth feed direction, A feeder supporting the left and right feed teeth so as to be movable in a direction crossing the cloth feed direction; Shanghai east means for imparting a vertical movement to the left and right feed teeth, Horizontal movement means for imparting horizontal movement along the cloth transfer direction to the left and right feed teeth; In the cloth transfer device of the sewing machine having a left and right movement means for imparting movement in the slide direction intersecting in the cloth transfer direction to each of the left and right feed teeth, The left and right movement means gives a movement in the slide direction so that the left and right feed teeth approach each other when the left and right feed teeth are on the needle plate, the movement in the slide direction to space the left and right feed teeth apart from each other when the left and right feed teeth are under the needle plate. Cloth transfer device of the sewing machine, characterized in that the operation to give. The method of claim 1, The left and right moving means, A plurality of support shafts fixed to the left and right feed teeth individually and arranged along the slide direction, And a plurality of support holes formed at both ends of the transfer table to support the support shaft so as to be movable separately in the slide direction. The method of claim 1, The left and right moving means, An upper and lower body supported to be slidable along an up and down direction, A left and right feed tooth link having one end connected to the upper and lower bodies and the other end connected to the left and right feed teeth; And a plurality of connecting pins connecting the left and right feed tooth links and the upper and lower bodies or the left and right feed teeth, and using one or more of these connecting pins as an eccentric pin to maintain the eccentric pin at a predetermined position. Device. Left and right feed teeth composed of right feed teeth and left feed teeth divided along the cloth feed direction, A feeder supporting the left and right feed teeth so as to be movable in a direction crossing the cloth feed direction; Shanghai moving means for imparting the movement in the vertical direction to the left and right feed teeth through the transfer table; Horizontal movement means for imparting horizontal movement to the left and right feed cogs through the feed table; In the cloth transfer device of the sewing machine having a left and right moving means for imparting movement in the slide direction intersecting the cloth feeding direction to the left and right feed teeth, The left and right moving means, Upper and lower body which is supported to be movable along the up and down direction while at the same time giving up and down movement, One end side is connected to the upper and lower bodies, and the other end side is connected to the left and right feed tooth link, And a phase change means for changing the phase of the upper and lower bodies with respect to the moving phase of the transfer table. A transfer table for movably supporting the slide feed tooth in a direction crossing the cloth feed direction, and shangdong means for imparting a vertical movement to the slide feed tooth through the feed table; Horizontal movement means for imparting a horizontal movement to the slide feed tooth through the feed table; Left and right moving means for imparting a movement in one direction to cross the cloth feed direction to the slide feed tooth, The transfer device of the sewing machine, characterized in that the linear feed teeth for providing the movement in the vertical direction and the horizontal direction by the Shanghai feed shaft and the horizontal feed shaft on one side of the movement of the slide feed teeth.

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