JP2023098581A - Sewing device - Google Patents

Abstract

To allow an object to be sewn to be pressed and sewn even in the vicinity of a needle, as needed, in the case where a conveyance device conveys the object to be sewn from the upstream side to the downstream side with respect to a sewing machine.SOLUTION: A sewing device includes: a conveyance device (4) for conveying an object (3) to be sewn while pressing it to a table (1); and a guide (5) for guiding the object to be sewn so as to approach an upper surface of the table. In the case of being viewed in a plane vies, between a conveyance region (41L) and a needle location region (1a) of a clamp part (41) of the conveyance device on the table, a space region (L3) is formed regarding a direction (Y) orthogonal to a conveyance direction (X) of the object to be sewn, and the conditions are satisfied that, in the case of being viewed in a plane view, an arrangement region (5a) of the guide is other than the space region, and that it at least includes the region on the upstream side in the conveyance direction of the object to be sewn with respect to the needle location region. By forming such a space region, the conveyance region of the clamp part can be brought close to the needle.SELECTED DRAWING: Figure 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine including a conveying device for automatically conveying a sewing material from an upstream side to a downstream side of a sewing machine.

A sewing machine usually has a presser foot. As an example of a presser foot, a presser foot having a shape surrounding a needle hole when viewed from above is known (Patent Document 1). More specifically, the presser foot disclosed in Patent Document 1 has a bifurcated shape when viewed from above. For convenience, each part of the presser foot is named. Each of the two branched portions is called a one-leg portion, and a portion where the two one-leg portions are joined is called a joint portion. In the presser foot, the needle moves in and out of the space between the two one leg portions, and the downstream side of the space in the conveying direction of the material to be sewn is closed by the joining portion. is used in a state in which the upstream side in the conveying direction is open. Moreover, the sewing machine disclosed in Patent Document 1 employs a manual conveying method in which a worker manually conveys the sewing material. Incidentally, the sewing machine disclosed in Patent Document 1 is provided with a feed dog below the presser foot. sent to the side.

As an example of a sewing machine, besides a sewing machine, there is known a sewing machine that employs a conveying device (automatic conveying system) that automatically conveys a sewing material from the upstream side to the downstream side of the sewing machine (Patent Document 1). 2). FIG. 12 of Patent Document 2 discloses a conveying device called a second sewing machine guide. In this sewing apparatus, the pressing plate of the second sewing machine guide section presses the material to be sewn on one side in the width direction thereof. It is configured to pass near the bottom of the

JP-A-62-44292 Japanese Patent No. 6423568

By the way, Patent Document 2 does not disclose the details of the sewing machine, and the presence or absence of a presser foot is unknown. However, sewing machines usually have a presser foot. The presser foot has the role of holding down the material to be sewn so that it does not lift up together with the needle during sewing.

Here, as a hypothetical sewing apparatus, it is assumed that the sewing machine of Patent Document 2 employs the presser foot of the manual transfer system disclosed in Patent Document 1, that is, the presser foot of the bifurcated presser foot.

This hypothetical sewing apparatus will be described in a plan view. As shown in FIG. 10, the hypothetical sewing apparatus has a branched leg portion 91 of the presser foot 9 between the presser plate of the conveying device and the needle 8. It will be. As a result, the position where the presser of the conveying device presses the sewn material is a position away from the one leg in the width direction of the presser foot. In FIG. 10, the conveying area of the conveying device on the table is indicated by hatching, and an elongated elliptical needle hole is shown between two branched leg portions 91. As shown in FIG.

However, if sewing is performed using a sewing machine with a presser foot, the quality of the sewing condition of the sewn material may be insufficient. In this case, even if it is desired to convey the sewing material while holding it as close as possible to the needle with the conveying device, the one foot portion of the presser foot becomes an obstacle. It should be noted that the sewing quality of the material to be sewn is better when the material is conveyed and sewn while holding it near the needle than when it is conveyed and sewn while holding the material sufficiently away from the needle. is known as common technical knowledge.

The present invention was created in view of the above-mentioned circumstances, and its object is to convey the material to be sewn in the vicinity of the needle as needed when the conveying device conveys the material to be sewn from the upstream side to the downstream side of the sewing machine. It is to hold things so that they can be sewn.

The sewing apparatus of the present invention comprises a table, a sewing machine body, a conveying device that conveys the sewing material from the upstream side to the downstream side with respect to the sewing machine body while pressing the sewing material against the table, and a sewing machine that moves the sewing material close to the upper surface of the table. A guide that guides to. The conveying device includes a clamping section that presses the sewing material against the table, and a conveying section that conveys the clamping section. Further, when viewed in plan, a space region is formed between the conveying region of the clamp portion and the needle drop region on the table in a direction orthogonal to the conveying direction of the material to be sewn, and when viewed in plan, the space region of the guide is formed. The arrangement area satisfies the condition that it is other than the spatial area and the condition that it includes at least the area on the upstream side in the conveying direction of the material to be sewn with respect to the needle drop area.

Further, the sewing apparatus is as follows when the area where the guide is arranged is clarified.
In other words, it is necessary to satisfy the conditions that the arrangement area of the guide part is around the needle drop area and the condition that it is away from the conveying area of the clamp part when viewed from above.

Also, in order to provide the arrangement area of the guides as narrow as possible, it is desirable to do as follows.
That is, when viewed in plan, a region passing through the needle drop region in a direction orthogonal to the conveying direction of the clamp portion is set as the first reference region, and when viewed in plan, the arrangement region of the guide portion is set as the first reference region. is to satisfy the condition that only the area on the upstream side in the conveying direction of the sewing material is satisfied with respect to the reference area of .

As a specific example, the guide is installed as follows.
That is, the guide is fixed via a bracket to the surface of the sewing machine body facing the upstream side in the conveying direction of the material to be sewn.

Further, the sewing apparatus of the present invention conveys the sewing material from the upstream side to the downstream side with respect to the sewing machine body while pressing it against the table. In order to clarify that it does not include conveying the material to be sewn while pressing it, it is desirable to do as follows.
In other words, the transport device is the only one that transports the material to be sewn.

In the sewing apparatus of the present invention, the arrangement area of the guide portion satisfies each condition, and in particular, the gap between the needle drop area and the conveying area of the clamp section is defined as a space area. It is possible to approach the needle while keeping it away from the needle.

1 is a perspective view showing an outline of a sewing device according to a first embodiment of the present invention; FIG. 1 is a front view showing a sewing device according to a first embodiment; FIG. It is a right side view showing the sewing device of the first embodiment. FIG. 3 is a cross-sectional view taken along line IV-IV of FIG. 2; It is a front view which shows the conveying apparatus used with the sewing apparatus of 1st embodiment. FIG. 3 is a plan view showing the relationship between needle drop positions and guides in the sewing device of the first embodiment; FIG. 9 is a plan view showing the relationship between needle drop positions and guides in the sewing device of the second embodiment; FIG. 11 is a plan view showing the relationship between needle drop positions and guides in the sewing device of the third embodiment; FIG. 11 is an explanatory diagram showing a sewing device according to a fourth embodiment; FIG. 4 is a plan view showing the relationship between the presser foot and the needle, etc. in a hypothetical sewing machine;

As shown in FIGS. 1 and 6, the sewing apparatus according to the first embodiment of the present invention conveys a table 1, a sewing machine 2, and a sewing material 3 from the upstream side to the downstream side of the sewing machine 2 while pressing them against the table 1. and a carrier device 4 for carrying out.

As shown in FIG. 5 , the conveying device 4 includes a clamping section 41 for pressing the sewing material 3 against the table 1 and a conveying section 42 for conveying the clamping section 41 . In this embodiment, the transport device 4 is the only one that transports the material 3 to be sewn.

The transport unit 42 is, for example, a multi-axis articulated robot. A robot arm 42a at the tip of the multi-joint robot extends downward, and a clamp part 41 is fixed to the lower end, which is the tip of the robot arm 42a. The transport unit 42 moves the clamp unit 41 according to a preset procedure, and transports the table 1 while pressing the clamp unit 41 against the table 1 .

The clamp portion 41 includes a clamp portion main body 41a that presses the sewing material 3, and an impact absorbing portion 41b that connects the clamp portion main body 41a and the tip portion of the robot arm 42a and absorbs impact. Although the clamp main body 41a is composed of a plurality of parts in the drawing, it is assumed to be a single plate in this embodiment.

The shock absorbing portion 41b extends horizontally and can move up and down with respect to a fixed arm 41c whose lengthwise intermediate portion is fixed to the tip portion of the robot arm 42a and both ends of the fixed arm 41c in the length direction. , a compression coil spring 41e that surrounds the rod 41d and is passed through the rod 41d, and a stopper 41f that supports the rod 41d by suspending it from the fixed arm 41c. The stopper 41f is fixed to the upper end of the rod 41d. The stopper 41f has a diameter larger than that of the rod 41d and cannot pass through a through hole (not shown) formed in the fixed arm 41c and penetrating vertically.

The compression coil spring 41e is arranged between the clamp body 41a and the fixed arm 41c. When the material to be sewn 3 is conveyed on the table 1, the conveyance section 42 is driven to press the clamp section main body 41a against the table 1 via the robot arm 42a. Then, the rod 41d integrated with the clamp main body 41a rises with respect to the fixed arm 41c, the compression coil spring 41e contracts between the clamp main body 41a and the fixed arm 41c, and the clamp main body 41a moves toward the table 1. The sewing material 3 is pressed against the upper surface of the . In this manner, the clamp main body 41a is conveyed from the upstream side to the downstream side of the sewing machine 2 while being sandwiched between the table 1 and the clamp main body 41a, whereby the sewing material 3 is conveyed.

As shown in FIG. 1, the sewing machine 2 comprises a sewing machine body 2a for sewing a material 3 to be sewn, a guide 5 for guiding the material 3 to be sewn so as to approach the upper surface of the table 1, and a bracket for attaching the guide 5 to the sewing machine body 2a. 6, and a positioning plate 7 that serves as a guide for the direction of the straight line when sewing the sewing material 3 while conveying it in a straight line.

The conveying direction of the sewing material 3 with respect to the sewing machine 2 depends on the movement of the conveying portion 42 of the conveying device 4 (the setting to the control device that controls the driving of the conveying portion 42). In the conveying device 4 of this embodiment, the conveying section 42 is an articulated robot as described above, and the conveying section 42 can be moved not only in a straight line but also in various directions. It seems unsettled. However, in the basic method of using the sewing machine 2 (basic conveying direction of the material to be sewn 3), the material to be sewn 3 is sewn while being conveyed in a straight line as described above. It is assumed that the object 3 is conveyed in the X direction. In this embodiment, the "conveying direction X of the sewing material 3" is the direction in which the positioning plate 7 can guide the end of the sewing material 3 in a straight line. Further, the conveying direction X of the material to be sewn 3 may be marked by a mark other than the positioning plate 7. If there is no mark, refer to the instruction manual of the sewing machine 2. FIG.

The "conveying direction X of the sewing material 3" is the direction from right to left in FIG. Therefore, the "left-right direction" in this embodiment corresponds to the left-right direction in FIG. Further, "the upstream side in the transport direction X" with respect to the object means the right side with respect to the object in FIG. Further, the "downstream side in the transport direction X" with respect to the object means the left side with respect to the object in FIG.
The conveying direction of the clamp part 41 coincides with the conveying direction X of the sewing material 3 .
The "direction Y perpendicular to the conveying direction X of the sewing material 3" is also referred to as the front-rear direction, which is the up-down direction in FIG. The upward direction in FIG. 4 is the rearward direction, and the downward direction in FIG. 4 is the forward direction.

As shown in FIGS. 1 and 4, the table 1 includes a throat plate 2t of the sewing machine 2 and a carrier table 11 which is a separate component from the throat plate 2t. Further, in this embodiment, the table 1 includes a portion of the positioning plate 7 of the sewing machine 2 as part of the table 1 in addition to the throat plate 2t and the conveying table 11 . The throat plate 2t, the conveying table 11, and a part of the positioning plate 7 all have horizontal upper surfaces and are aligned so as to be positioned substantially on the same plane.

The positioning plate 7 includes a positioning main body portion 71 having a vertical surface and capable of positioning the end of the sewing material 3 , and a positioning main body portion 71 that extends in a manner bent at right angles to the positioning main body portion 71 and supports the lower surface side of the sewing material 3 . It has a lower plate portion 72 that can be guided, and a fixing plate portion 73 that is continuous with the positioning body portion 71 and fixed to the sewing machine body 2a. Note that the lower plate portion 72 is a portion that constitutes a part of the table 1 .

The positioning body portion 71 is a vertical plate extending in the left-right direction. A lower plate portion 72 is continuous with the lower end portion of the positioning main body portion 71, and a fixing plate portion 73 is continuous with the upper end portion of the positioning main body portion 71 for fixing to the sewing machine main body 2a.

As shown in FIG. 4, the fixing plate portion 73 is a plate that is bent at a right angle when viewed from above. and a second fixing plate portion 75 that extends in a curved manner and is continuous with the positioning main body portion 71 . The second fixing plate portion 75 extends on the side opposite to the lower plate portion 72 with respect to the positioning body portion 71 . Also, the first fixing plate portion 74 is parallel to the positioning body portion 71 .

The lower plate portion 72 is arranged downstream in the transport direction X with respect to the throat plate 2t.
The conveying table 11 extends straight in the conveying direction X in plan view, and extends in the left-right direction over a range between the upstream side and the downstream side with respect to the sewing machine 2 . Further, the conveying table 11 is formed with a recessed portion 11c that is recessed in a direction away from the sewing machine 2, and the lower plate portion 72 of the positioning plate 7 and the throat plate 2t are arranged in the recessed portion 11c.

The sewing machine main body 2a is a well-known one, and an upper thread passed through a needle 8 and a bobbin thread supplied to the lower side of the needle plate 2t of the table 1 are entwined, and a sewing material is placed on the needle plate 2t. Form a seam for 3. Incidentally, in this embodiment, the sewing machine main body 2a is a chain stitch sewing machine, and cooperates with the conveying device 4 to overlock one side of a rectangular material to be sewn.
As shown in FIGS. 2 and 3, the sewing machine body 2a includes a bed portion 21 installed on the lower side of the table 1, a post portion 22 erected from the bed portion 21, and an upper portion of the post portion 22 extending from the bed portion 21. and a sewing machine head portion 23 extending in a state of facing each other from above.

The sewing machine main body 2a extends in the front-rear direction with the bed portion 21 and the sewing machine head portion 23 separated vertically. ing.

The bed section 21 includes a bed case 21a forming its outer shell and an internal mechanism housed in the bed case 21a. The internal mechanism is a mechanism that entangles the lower thread with the upper thread. A needle plate 2t having a needle hole 1h is provided on the upper surface of the bed case 21a as a part of the bed case 21a.

The sewing machine head section 23 includes a sewing machine head case 23a forming its outer shell and an internal mechanism housed in the sewing machine head case 23a. Incidentally, the internal mechanism includes a needle bar vertical movement mechanism, a thread take-up mechanism, and the like. The sewing machine head portion 23 is arranged in a state in which the needle bar 23b of the needle bar drive mechanism protrudes downward from the lower surface of the front end portion of the sewing machine head case 23a. A needle 8 is attached to the lower end of the needle bar 23b so as to extend downward.

The post portion 22 includes a post case 22a forming its outer shell and an internal mechanism housed in the post case 22a. The internal mechanism is, for example, a mechanism that interlocks the internal mechanism of the sewing machine head portion 23 and the internal mechanism of the bed portion 21 . A guide 5 is fixed via a bracket 6 to a surface of the post case 22a (sewing machine body 2a) above the table 1 and facing the upstream side in the conveying direction X of the sewing material 3. As shown in FIG.

The bracket 6 is composed of a plurality of parts. As shown in FIG. 4, the bracket 6 includes a first bracket 61 fixed to the post portion 22 of the sewing machine main body 2a in a plan view so as to extend upstream in the conveying direction X, and a front end of the first bracket 61. and a second bracket 62 fixed to the portion (end portion on the upstream side in the conveying direction X) and extending in a direction Y orthogonal to the conveying direction X right above the table 1 in plan view.

The first bracket 61 is a metal plate bent to open downward. More specifically, as shown in FIG. 2, the first bracket 61 includes two fixed plate portions 61a and 61b arranged in parallel with each other in the conveying direction X, and two fixed plate portions 61a and 61b. and a first bracket body portion 61c extending in the conveying direction X in a state where the upper ends of the brackets are connected to each other. As shown in FIG. 4, the first bracket main body 61c has a shape extending perpendicularly in plan view. Specifically, the first bracket main body 61c includes a first plate portion 61d extending in the transport direction X and a second plate portion extending toward the table 1 from the upstream end of the first plate portion 61d. 61e. Of the two fixing plate portions 61a and 61b, the fixing plate portion 61a on the downstream side is fixed to the post case 22a of the sewing machine main body 2a. On the other hand, the fixed plate portion 61b on the upstream side is longer than the fixed plate portion 61a on the downstream side in the direction Y perpendicular to the conveying direction X, and the second bracket 62 is fixed thereon.

As shown in FIG. 4, the second bracket 62 is a metal plate bent in an L shape in plan view. More specifically, the second bracket 62 is fixed to the upstream fixed plate portion 61b of the first bracket 61 and extends in the direction Y orthogonal to the conveying direction X toward the upstream side of the needle plate 2t. A second bracket body portion 62a and a fixed plate portion 62b extending in the transport direction X and having an upstream end portion in the transport direction X connected to a front end portion (front end portion) of the second bracket body portion 62a. . A guide 5 is fixed to the fixed plate portion 62 b of the second bracket 62 .

The guide 5 is a rigid body, and is assumed to be a metal object in this embodiment. As shown in FIGS. 2 and 3, the guide 5 includes a guide block portion 51 that guides the sewing material 3 closer to the upper surface of the table 1 and extends in the conveying direction X, and a bracket that extends upward from the guide block portion 51 . 6 (the fixed plate portion 62b of the second bracket 62). In this embodiment, screws are used to fix the guide 5 and the bracket 6, the bracket 6 and the sewing machine main body 2a, and the positioning plate 7 and the sewing machine main body 2a.

As shown in FIG. 3 , the fixed block portion 52 is shorter in the lateral direction than the guide block portion 51 and extends upward from the upper surface of the guide block portion 51 on the side of the post portion 22 . Further, as shown in FIG. 2, the fixed block portion 52 is shorter than the guide block portion 51 in the front-rear direction (conveyance direction X), and extends upward from the upper surface of the guide block portion 51 in the conveyance direction X. It has become.

As shown in FIG. 2, the upper surface of the guide block portion 51 is recessed (lowered) in a stepped manner with respect to the portion on the downstream side in the transport direction X of the fixed block portion 52 with respect to the portion on the upstream side in the transport direction X. be.
The lower surface of the guide block portion 51 (the lower surface of the guide 5) is a first guide surface 51a that descends (approaches the table 1) in the conveying direction X of the sewing material 3, and a first guide surface 51a. A second guide surface 51 b is provided adjacent to the downstream side of the sewing material 3 in the conveying direction X and parallel to the upper surface of the table 1 .

The arrangement area 5a of the guide 5 when viewed from above will be described below with reference to FIG. First, the premise for specifying the arrangement area 5a of the guide 5 is as follows.

The needle drop area 1a on the table 1 is the area where the needle 8 just penetrates the table 1 in the present invention. In the example of FIG. 6, the needle drop area 1a is circular. In the present embodiment, the needle hole 1h is a long and narrow hole that partially includes the needle drop area 1a and is elongated in the left-right direction. Further, the needle hole 1h is larger than the outer periphery of the needle 8 so as not to touch the needle 8, more specifically, it is slightly longer in the front and rear than the needle drop area 1a, and is sufficiently longer in the lateral direction than the needle drop area 1a. ing. Further, when viewed from above, the outline of the pinhole 1h is a boundary dividing the region of the pinhole 1h into the inside and outside, so the pinhole 1h becomes the pinhole region 1h when viewed from above. A needle hole region 1h on the table 1, that is, a needle hole region 1h in plan view is larger than the needle drop region 1a.

The conveying area 41L of the clamping portion 41 is an area parallel to the conveying direction X, and is separated from the needle drop area 1a in the direction Y perpendicular to the conveying direction X and opposite to the post portion 22 of the sewing machine body 2a. ing.

Also, two areas are set.
The first reference area L1 is an area that passes through the needle drop area 1a in the direction Y perpendicular to the transport direction X. As shown in FIG.
The second reference area L2 is an area that passes through the needle drop area 1a in the transport direction X. As shown in FIG.

A space area L3 is formed in a direction Y orthogonal to the conveying direction X of the clamping part 41 between the conveying area 41L of the clamping part 41 and the needle drop area 1a. The spatial region L3 is, as the name suggests, a region in which no object exists. The spatial region L3 is part of the first reference region L1. In this embodiment, the space area L3 is formed not only between the conveying area 41L of the clamping part 41 and the needle drop area 1a, but also between the conveying area 41L of the clamping part 41 and the needle hole area 1h.

The arrangement area 5a of the guide 5 in this embodiment is as follows when viewed from above. The arrangement area 5a of the guide 5 is rectangular as shown in FIG. 6, and is indicated by scattered dots in FIG. A needle hole region 1h is arranged on the downstream side in the conveying direction X away from the arrangement region 5a of the guide 5. As shown in FIG. Further, the entire arrangement area 5a of the guide 5 is arranged on the upstream side in the transport direction X away from the first reference area L1 including the needle drop area 1a. That is, the arrangement area 5a of the guide 5 is arranged only on the upstream side in the transport direction X with respect to the first reference area L1. Since the space area L3 is included in the first reference area L1, the arrangement area 5a of the guide 5 is formed outside the space area L3.

Also, the arrangement area 5a of the guide 5 and the second reference area L2 partially overlap. More specifically, the second reference area L2 passes through an intermediate portion of the arrangement area 5a of the guide 5 in the front-rear direction (the direction Y perpendicular to the transport direction X). The placement area 5a of the guide 5 includes an area that overlaps the second reference area L2, an area that protrudes from the second reference area L2 toward the conveying area 41L side of the clamp section 41, and an area that overlaps the second reference area L2. On the other hand, it has an area protruding on the opposite side of the conveying area 41L of the clamp part 41 .

It should be noted that the arrangement area 5a of the guide 5 in plan view satisfies the condition that it is around the needle drop area 1a and the condition that it is separated from the conveying area 41L of the clamp part 41. FIG. If it is not around the needle drop area 1a, the guide 5 cannot play the role of guiding the sewing material directly under the needle 8 during sewing, and sewing defects are likely to occur. Incidentally, since the clamping portion 41 of the conveying device 4 presses the sewing material against the table 1, the clamping portion 41 serves to prevent the sewing material 3 from being lifted together with the needles 8. FIG. The guide 5 also plays an auxiliary role in preventing the material 3 to be sewn from being lifted together with the needle 8. As shown in FIG.
If the arrangement area 5a of the guide 5 and the transfer area 41L of the clamp part 41 are not separated from each other, the clamp part 41 collides with the guide 5. In addition, the collision makes the clamping state unstable and the role of the guide 5 unstable, which is not desirable.

In order to bring the conveying area 41L of the clamping section 41 as close to the needle 8 (needle drop area 1a) as possible, the placement area 5a of the guide 5 should protrude from the conveying area 41L side of the clamping section 41 beyond the second reference area L2. is as short as possible, and the end of the clamping section 41 on the conveying area 41L side in the placement area 5a is preferably aligned with the second reference area L2.

In the sewing apparatus of the first embodiment described above, the placement region 5a of the guide 5 satisfies each condition, and in particular, the space region between the needle hole region 1h including the needle drop region 1a and the conveying region 41L of the clamp portion 41 is a space region. Since it is set to L3, it is possible to bring the conveying area 41L of the clamping part 41 closer to the needle 8 while keeping it away from the arrangement area 5a of the guide 5. FIG. In addition, the sewing apparatus of the first embodiment satisfies the condition that the arrangement area 5a of the guide 5 is only on the upstream side in the conveying direction X of the first reference area L1 and the needle hole area 1h. is located in a narrower range than the

As shown in FIG. 7, in the sewing apparatus according to the second embodiment of the present invention, the arrangement area 5b of the guide 5 is wider than the arrangement area 5a of the first embodiment.

The placement region 5b of the guide 5 is L-shaped when viewed from above, and is located on the opposite side of the conveying region 41L of the clamp portion 41 and on the upstream side in the conveying direction X with respect to the needle hole region 1h including the needle drop region 1a. placed apart. More specifically, the arrangement area 5b of the guide 5 is located upstream of the sewing material 3 in the conveying direction X with respect to the first reference area L1 partially including the needle drop area 1a and the needle hole area 1h. a first arrangement region A extending in a direction Y perpendicular to the conveying direction X of the clamping portion 41, and a first placement region A on the side opposite to the conveying region 41L of the clamping portion 41 with respect to the second reference region L2 and the needle hole region 1h. A second placement region B extending in the transport direction X in a state perpendicular to the reference region L1 is provided.

The first arrangement area A is the same as the arrangement area 5a of the guide 5 in the first embodiment.
The second arrangement area B extends over the range of the upstream side and the downstream side in the transport direction X from the first reference area L1 and the pin hole area 1h.

In the sewing apparatus of the second embodiment, since the first arrangement area A is included in the arrangement area 5b of the guide 5, the first reference area L1 and the needle hole area 1h including the needle drop area 1a as part thereof A part of the arrangement area 5b of the guide 5 (the first arrangement area A) is arranged on the upstream side in the transport direction X away. Further, the arrangement area 5b of the guide 5 is formed outside the space area L3, like the arrangement area 5a of the first embodiment. It should be noted that the arrangement area 5b of the guide 5 in plan view satisfies the condition that it is around the needle drop area 1a and the condition that it is separated from the conveying area 41L of the clamp part 41. FIG.

In addition, the part which forms the 1st arrangement|positioning area|region A among the lower surfaces of the guide 5 of 2nd Embodiment is the same as the lower surface of the guide 5 of 1st Embodiment. That is, the portion of the lower surface on the upstream side in the conveying direction X in the first arrangement area A is the first guide surface 51a (a surface that descends in the conveying direction X and approaches the table 1). A portion of the first arrangement area A on the downstream side in the transport direction X is the second guide surface 51b (a surface parallel to the upper surface of the table 1). In the lower surface of the guide 5 of the second embodiment, the portion forming the second arrangement area B has the upstream end portion in the transport direction X as the first guide surface 51a, and the rest as the second guide surface 51b. do. The first guide surface 51a of the portion forming the second placement region B and the first guide surface 51a of the portion forming the first placement region A are continuous in the direction Y orthogonal to the conveying direction X. .
In addition, the portion of the lower surface of the guide in the second embodiment, which is upstream of the needle drop area 1a in the conveying direction X, mainly serves as the guide 5 for guiding the sewing material directly below the needle 8 during sewing. The remaining parts serve only to prevent the material to be sewn 3 from being lifted up together with the needle 8 .

As shown in FIG. 8, in the sewing apparatus according to the third embodiment of the present invention, the arrangement area 5c of the guide 5 is wider than the arrangement area 5b of the second embodiment.

When viewed from above, the arrangement area 5c of the guide 5 is U-shaped, and in addition to the first arrangement area A and the second arrangement area B, the first reference area L1 and the needle hole area 1h are arranged. and a third placement region C extending in a direction Y orthogonal to the transport direction X from the downstream side of the second placement region B toward the transport region 41L of the clamp part 41 at a position away from the downstream side in the transport direction X. .

The third arrangement area C is arranged to face the first arrangement area A with the needle hole area 1h as the center. The third arrangement area C is also separated from the conveying area 41L of the clamp part 41 in the direction Y orthogonal to the conveying direction X. As shown in FIG.

In the sewing machine of the third embodiment, since the first arrangement area A is included in the arrangement area 5c of the guide 5, the first reference area L1 and the needle hole area 1h including the needle drop area 1a as a part thereof. A part of the arrangement area 5c of the guide 5 (the first arrangement area A) is arranged on the upstream side in the transport direction X away. Further, the arrangement area 5c of the guide 5 is formed outside the space area L3. It should be noted that the arrangement area 5c of the guide 5 in plan view satisfies the condition that it is around the needle drop area 1a and the condition that it is separated from the conveying area 41L of the clamp part 41. FIG.

In addition, the part which forms the 3rd arrangement|positioning area|region C among the lower surfaces of the guide 5 of 3rd embodiment is the 2nd guide surface 51b (surface parallel to the upper surface of the table 1).
Further, the portion of the lower surface of the guide 5 of the third embodiment, which is upstream of the needle drop area 1a in the conveying direction X, mainly plays the role of the guide 5 for guiding the sewing material directly below the needle 8 during sewing. , the other part serves only to prevent the material to be sewn 3 from being lifted together with the needle 8 .

As shown in FIG. 9, the sewing apparatus according to the fourth embodiment of the present invention differs from the sewing apparatus according to the first embodiment in the details of the table 1, the sewing machine 2, and the conveying device 4. As shown in FIG. However, the sewing device according to the fourth embodiment also has the same arrangement area 5a for the guide 5 as the sewing device according to the first embodiment.

The table 1 is composed of one conveying table 12 . In this case, a needle hole 1h is formed in a portion of the conveying table 12 corresponding to the needle plate.

The sewing machine 2 does not have the positioning plate 7 of the first embodiment. Since there is no positioning plate 7, the end of the sewing material 3 can be sewn closer to the post portion 22 side of the sewing machine body 2a than the sewing machine 2 of the first embodiment with the positioning plate 7.
Further, in the fourth embodiment, the sewing machine main body 2a is a lockstitch sewing machine, and cooperates with the conveying device 4 to form straight perforation-like seams on the sewing material 3. As shown in FIG.

The conveying device 4 has a clamp portion 41 corresponding to the size of the sewn product 3, and a clamp portion main body 41a formed longer in the conveying direction than in the first embodiment. Incidentally, the clamp main body 41a may be composed only of a plate when the sewing material 3 is a single piece of fabric, but when the sewing material 3 is two layers of fabric stacked one above the other, the clamp body 41a may It is desirable to use a needle that pierces the fabric and a plate with the needle protruding from the bottom surface.

The present invention is not limited to the above embodiments, and can be modified as appropriate without departing from the scope of the invention. For example, in the present embodiment, the needle hole 1h has an elongated long hole shape, but the present invention is not limited to this, and may have another shape represented by a round hole. Further, in the conveying device 4, a multi-axis articulated robot is used for the conveying unit 42 in the present embodiment, but the present invention is not limited to this, and the conveying unit 4 may simply convey the clamping unit in a straight line. In this case, the conveying direction of the clamp portion and the conveying direction X of the sewing material 3 coincide.

1 table 1a needle drop region 1h needle hole, needle hole region 11, 12 conveying table 11c concave portion 2 sewing machine 2a sewing machine main body 2t throat plate 21 bed portion 21a bed case 22 post portion 22a post case 23 sewing machine head portion 23a sewing machine head case 23b needle Bar 3 Material to be sewn 4 Transfer device 41 Clamp part 41a Clamp part body 41b Impact absorbing part 41c Fixed arm 41d Rod 41e Compression coil spring 41f Stopper 41L Transfer area of clamp part 42 Transfer part 42a Robot arm 5 Guides 5a, 5b, 5c Arrangement area 51 guide block portion 51a first guide surface 51b second guide surface 52 fixed block portion 6 bracket 61 first brackets 61a, 61b fixed plate portion 61c first bracket body portion 61d first plate portion 61e second Plate 62 Second bracket 62a Second bracket main body 62b Fixing plate 7 Positioning plate 71 Positioning main body 72 Lower plate 73 Fixing plate 74 First fixing plate 75 Second fixing plate 8 Needle 9 Presser foot A First placement area B Second placement area C Third placement area L1 First reference area L2 Second reference area L3 Spatial area X Conveying direction Y Orthogonal direction

Claims (5)

a table (1), a sewing machine body (2a), and a conveying device (4) for conveying a material to be sewn (3) from the upstream side to the downstream side of the sewing machine body (2a) while pressing it against the table (1). , a guide (5) for guiding the sewing material (3) to approach the upper surface of the table (1),
The conveying device (4) includes a clamping section (41) for pressing the sewing material (3) against the table (1), and a conveying section (42) for conveying the clamping section (41),
When viewed from above, a space area (L3) is formed between the conveying area (41L) of the clamp part (41) and the needle drop area (1a) on the table (1). formed with respect to a direction (Y) perpendicular to the conveying direction (X),
The condition that the placement areas (5a, 5b, 5c) of the guides (5) are outside the space area (L3) when viewed from above, and the sewing object ( 3) that at least a region on the upstream side in the conveying direction (X) is included. The condition that the placement areas (5a, 5b, 5c) of the guide (5) in plan view are around the needle drop area (1a) and the transfer area (41L) of the clamp section (41) 2. The sewing device according to claim 1, wherein the condition of being spaced apart from the . A region passing through the needle drop region (1a) in a direction (Y) orthogonal to the conveying direction (X) of the clamping portion (41) when viewed from above is set as a first reference region (L1). ,
When viewed from above, the arrangement area (5a) of the guide (5) is an area on the upstream side in the conveying direction (X) of the sewing material (3) with respect to the first reference area (L1). 3. The sewing device according to claim 2, wherein the condition that only The guide (5) is fixed to the sewing machine main body (2a) via a bracket (6) on the surface of the material to be sewn (3) facing the upstream side in the conveying direction (X). 4. The sewing device according to claim 3. Sewing device according to any one of the preceding claims, characterized in that the conveying device (4) is the only one conveying the article to be sewn (3).

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