CN116356493A

CN116356493A - Sewing device

Info

Publication number: CN116356493A
Application number: CN202111626192.3A
Authority: CN
Inventors: 西田瞳; 梅川道
Original assignee: YKK Corp
Current assignee: YKK Corp
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2023-06-30
Also published as: JP2023098581A; TW202325943A; JP7335408B2; TWI820969B

Abstract

The invention provides a sewing device, which can press and sew a sewn object even near a machine needle according to the requirement when a conveying device conveys the sewn object from an upstream side to a downstream side relative to a sewing machine. The sewing device comprises: a conveying device for conveying the sewn object while pressing the sewn object on the workbench; and a guide for guiding the object to be sewn so that the object to be sewn approaches the upper surface of the table. A space region is formed between a conveying region and a needle falling region of a clamping part of a conveying device on a workbench in a plane view in a direction orthogonal to a conveying direction of a sewn object, and the arrangement region of a guide in the plane view satisfies the following conditions: the condition that the arrangement region is located in a region other than the space region, and the condition that the arrangement region includes at least a region on the upstream side of the needle falling region in the conveying direction of the sewn object. Since such a space region is formed, the conveying region of the nip portion can be brought close to the needle.

Description

Sewing device

Technical Field

The present invention relates to a sewing device including a conveying device for automatically conveying a sewn object from an upstream side to a downstream side with respect to a sewing machine.

Background

Sewing machines are generally provided with a presser foot. As an example of the presser foot, a presser foot is known which surrounds a pinhole in a plan view (patent document 1). More specifically, the presser foot disclosed in patent document 1 has a two-fork shape in a plan view. For convenience of description, the parts of the presser foot are given names. Each of the portions bifurcated into two is referred to as a single foot, and the portion where the two single feet join is referred to as a joint. In the presser foot, the needle is put in and out of a space portion between the two single legs, and is used in the following state: the downstream side of the space portion in the conveying direction of the sewn object is closed by the joint portion, and the upstream side of the space portion in the conveying direction of the sewn object is opened. The sewing machine disclosed in patent document 1 adopts a manual conveyance system in which an operator conveys a workpiece by hand. In addition, the sewing machine disclosed in patent document 1 is provided with a feed dog below the presser foot, and the feed dog feeds the object to be sewn downstream with respect to the sewing machine while sandwiching the object to be sewn between the feed dog and the presser foot.

As an example of a sewing device, a sewing device is known which employs a conveyor (automatic conveyor) for automatically conveying a workpiece to the sewing machine from an upstream side to a downstream side in addition to the sewing machine (patent document 2). Fig. 12 of patent document 2 discloses a conveyor called a guide for a 2 nd sewing machine. The sewing device is configured to: the 2 nd presser plate of the guide portion for the sewing machine presses the object to be sewn on one side in the width direction of the object to be sewn, and when the presser plate is conveyed, the edge portion of the object to be sewn passes through the vicinity of the right under the needle of the sewing machine.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open No. 62-44292

Patent document 2: japanese patent No. 6423568

Disclosure of Invention

However, patent document 2 does not disclose the structure of the sewing machine in detail, and the presence or absence of the presser foot is not clear. However, sewing machines typically have a presser foot. The presser foot plays a role of pressing the sewn object to prevent the sewn object from being lifted together with the machine needle during sewing.

Here, as a hypothetical sewing device, a sewing machine of patent document 2 employs a manual feed type presser foot disclosed in patent document 1, that is, a two-fork presser foot.

This will be described in a state of a plan view of the hypothetical sewing device, in which, as shown in fig. 10, a bifurcated single leg 91 of the presser foot 9 is disposed between the presser plate of the conveying device and the needle 8. As a result, the position where the pressing plate of the conveying device presses the sewn object is located at a position distant from the single leg portion in the width direction of the presser foot. In fig. 10, the conveying area of the conveying device on the table is shown hatched, and an elongated elliptical pinhole is shown between the bifurcated two single legs 91.

However, when sewing is performed by a sewing machine with a presser foot, there is a case where the quality of the sewn material is insufficient. In this case, even if the workpiece is to be conveyed while being pressed by the conveying device at a position as close as possible to the needle, the single leg portion of the presser foot is hindered. In addition, the following technical common sense is known: the sewing quality of the object to be sewn is better when the object to be sewn is conveyed while being pressed in the vicinity of the needle to be sewn than when the object to be sewn is conveyed while being pressed at a position sufficiently far from the needle to be sewn.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a sewing apparatus capable of pressing and sewing a workpiece in the vicinity of a needle as needed when a conveyor conveys the workpiece from an upstream side to a downstream side with respect to a sewing machine.

The sewing device of the invention comprises: a work table; a sewing machine main body; a conveying device for conveying the sewn object from the upstream side to the downstream side relative to the sewing machine main body while pressing the sewn object on the workbench; and a guide for guiding the object to be sewn so that the object to be sewn approaches the upper surface of the table. Further, the conveying apparatus includes: a clamping part for pressing the sewed object on the workbench; and a conveying unit that conveys the clamping unit. A space region is formed between the conveying region and the needle drop region of the clamping part on the workbench in a plane view in a direction orthogonal to the conveying direction of the sewn object, and the arrangement region of the guide in the plane view satisfies the following conditions: the arrangement region includes at least a condition of a region on an upstream side of the needle drop region in a conveying direction of the object to be sewn.

In order to further clarify the arrangement region of the guide, the sewing device is as follows.

That is, the arrangement region of the guide portion in plan view satisfies the following condition: the arrangement region is located around the needle drop region, and the arrangement region is located away from the conveying region of the clamping part.

In addition, in order to be set as narrow as possible, the arrangement region of the guide is preferably as follows.

That is, the region passing through the needle drop region in the direction orthogonal to the conveying direction of the nip portion in a plan view is set as the 1 st reference region, and the arrangement region of the guide portion in a plan view satisfies the following condition: the 1 st reference region is only a region on the upstream side of the conveyance direction of the sewn object.

As a specific example, the guide is provided in the following manner.

That is, the guide is fixed to a surface of the sewing machine body on an upstream side in a conveying direction of the sewing object via the bracket.

In the sewing device of the present invention, the object to be sewn is conveyed from the upstream side to the downstream side with respect to the sewing machine body while being pressed against the table, and in order to clarify that the device does not include any additional means, for example, a device for conveying the object to be sewn while being pressed against the guide from the lower side of the table is preferable as follows.

That is, the conveying device is the only device for conveying the sewn object.

In the sewing device of the present invention, the arrangement region of the guide portion satisfies each condition, and particularly, the space region is formed between the needle falling region and the conveying region of the clamping portion, so that the conveying region of the clamping portion can be brought close to the needle while keeping a state of being away from the arrangement region of the guide.

Drawings

Fig. 1 is a perspective view schematically showing a sewing apparatus according to a first embodiment of the present invention.

Fig. 2 is a front view showing the sewing apparatus of the first embodiment.

Fig. 3 is a right side view showing the sewing apparatus of the first embodiment.

Fig. 4 is a cross-sectional view taken along line IV-IV of fig. 2.

Fig. 5 is a front view showing a conveying device used in the sewing device according to the first embodiment.

Fig. 6 is a plan view showing a relationship between a needle falling position and a guide in the sewing apparatus according to the first embodiment.

Fig. 7 is a plan view showing a relationship between a needle drop position and a guide in the sewing apparatus according to the second embodiment.

Fig. 8 is a plan view showing a relationship between a needle drop position and a guide in the sewing apparatus according to the third embodiment.

Fig. 9 is an explanatory diagram showing a sewing apparatus according to the fourth embodiment.

Fig. 10 is a plan view showing a relationship between a presser foot and a needle or the like in an assumed sewing apparatus.

Description of the reference numerals

1. Working table

1a needle drop zone

1h pinhole, pinhole region

11. 12 conveying workbench

11c recess

2. Sewing machine

2a Sewing machine body

2t needle plate

21. Base portion

21a base shell

22. Column part

22a column casing

23. Sewing machine head

23a sewing machine head shell

23b needle bar

3. Sewn article

4. Conveying device

41. Clamping part

41a clamping part body

41b impact absorbing portion

41c fixing arm

41d pole

41e compression coil spring

41f limiting piece

Conveying area of 41L clamping part

42. Conveying part

42a mechanical arm

5. Guide piece

5a, 5b, 5c arrangement region

51. Guide block part

51a 1 st guide surface

51b 2 nd guide surface

52. Fixed block part

6. Support frame

61. 1 st support

61a, 61b fixing plate portion

61c 1 st stand main body

61d 1 st plate portion

61e No. 2 plate portion

62. No. 2 support

62a 2 nd support body

62b fixing plate portion

7. Positioning plate

71. Positioning body part

72. Lower plate part

73. Fixing plate part

74. No. 1 fixing plate portion

75. 2 nd fixed plate part

8. Machine needle

9. Presser foot

A1st arrangement region

B2 nd arrangement area

C3 rd configuration region

L1 st reference area

L2 nd reference area

L3 spatial region

X direction of conveyance

Direction of Y quadrature

Detailed Description

As shown in fig. 1 and 6, a sewing device according to a first embodiment of the present invention includes: a table 1, a sewing machine 2, and a conveyor 4 for conveying the object 3 to be sewn from the upstream side to the downstream side relative to the sewing machine 2 while pressing the object against the table 1.

As shown in fig. 5, the conveying apparatus 4 includes: a clamping part 41 for pressing the sewed object 3 to the workbench 1; and a conveying section 42 that conveys the gripping section 41. In the present embodiment, the conveying device 4 is the only device that conveys the sewn object 3.

The transport unit 42 is, for example, a multi-axis multi-joint robot. The arm 42a at the distal end of the articulated manipulator extends downward, and the clamp 41 is fixed to the lower end portion, which is the distal end portion of the arm 42 a. The conveying unit 42 moves the holding unit 41 in accordance with a predetermined procedure, and conveys the holding unit 41 while pressing it against the table 1.

The clamping portion 41 includes: a clamp portion main body 41a for pressing the sewn object 3; and an impact absorbing portion 41b that connects the clamp portion main body 41a and the top portion of the robot arm 42a and absorbs an impact. The clamp body 41a includes a plurality of members in the drawing, but is a single plate in the present embodiment.

The impact absorbing portion 41b includes: a fixing arm 41c which extends horizontally and whose middle portion in the length direction of extension is fixed to the top of the mechanical arm 42 a; a rod 41d that is guided so as to be movable up and down with respect to both longitudinal end portions of the fixed arm 41 c; a compression coil spring 41e penetrating the rod 41d so as to surround the rod 41 d; and a stopper 41f for supporting the rod 41d in a hanging manner with respect to the fixed arm 41 c. The stopper 41f is fixed to the upper end portion of the lever 41 d. The stopper 41f has a larger diameter than the rod 41d, and cannot pass through a through hole (not shown) formed in the fixing arm 41c and penetrating in the vertical direction.

The compression coil spring 41e is disposed between the clamp body 41a and the fixed arm 41 c. When the workpiece 3 is conveyed on the table 1, the conveying unit 42 drives the clamp unit body 41a to be pressed against the table 1 via the robot arm 42 a. Then, the rod 41d integrated with the clamp body 41a is lifted up with respect to the fixed arm 41c, and the compression coil spring 41e is contracted between the clamp body 41a and the fixed arm 41c, so that the clamp body 41a presses the work piece 3 against the upper surface of the table 1. In this way, the clamp portion main body 41a is conveyed from the upstream side to the downstream side with respect to the sewing machine 2 in a state of sandwiching the object 3 with the table 1, so that the object 3 is conveyed.

As shown in fig. 1, the sewing machine 2 includes: a sewing machine main body 2a for sewing a sewn object 3; a guide 5 for guiding the object 3 to be sewn so that the object 3 is brought close to the upper surface of the table 1; a bracket 6 for attaching the guide 5 to the sewing machine body 2a; and a positioning plate 7 which becomes a mark of a straight line direction when the object 3 to be sewn is sewn along the straight line conveying side.

The conveying direction of the object 3 to be sewn with respect to the sewing machine 2 depends on the movement of the conveying section 42 of the conveying device 4 (setting of the control device that controls the driving of the conveying section 42). Further, the conveying section 42 of the conveying apparatus 4 according to the present embodiment can move the conveying section 42 not only in a straight line but also in various directions by using the articulated robot as described above, and thus it is considered that the conveying direction X is uncertain at first glance. However, since the basic use method of the sewing machine 2 (the basic conveying direction of the object 3) is to perform sewing while conveying the object 3 along a straight line as described above, the direction of the straight line is referred to as the conveying direction X of the object 3 in the present invention. In the present embodiment, the "conveyance direction X of the object 3" refers to a direction in which the positioning plate 7 can guide the end of the object 3 along a straight line. Note that, the conveyance direction X of the sewn object 3 may be marked by a mark other than the positioning plate 7, and if no member is provided as a mark, reference may be made to the operation instruction of the sewing machine 2.

The "conveying direction X of the sewn object 3" is a direction from right to left in fig. 4. Therefore, the "right-left direction" in the present embodiment coincides with the right-left direction in fig. 4. The "upstream side in the conveying direction X" with respect to the object means the right side with respect to the object in fig. 4. The "downstream side in the conveying direction X" with respect to the object means the left side with respect to the object in fig. 4.

The conveying direction of the nip 41 matches the conveying direction X of the sewn object 3.

The "direction Y orthogonal to the conveying direction X of the workpiece 3" is also referred to as the front-rear direction, and is the up-down direction in fig. 4. The upward direction in fig. 4 is the rear direction, and the downward direction in fig. 4 is the front direction.

As shown in fig. 1 and 4, the table 1 includes a needle plate 2t of the sewing machine 2 and a conveying table 11 as a member other than the needle plate 2 t. In addition, the table 1 of the present embodiment includes a part of the positioning plate 7 of the sewing machine 2 as a part of the table 1 in addition to the needle plate 2t and the conveying table 11. The upper surfaces of the needle plate 2t, the conveying table 11, and a part of the positioning plate 7 are all horizontal planes and aligned so as to be substantially flush.

The positioning plate 7 includes: a positioning main body portion 71 having a vertical surface and capable of positioning an end portion of the sewn object 3; a lower plate portion 72 extending in a manner of being bent at right angles to the positioning body portion 71 and capable of guiding the lower surface side of the sewn object 3; and a fixing plate portion 73 connected to the positioning body portion 71 and fixed to the sewing machine body 2a. The lower plate 72 is a part constituting a part of the table 1.

The positioning body 71 is a vertical plate, and extends in the left-right direction. The lower plate portion 72 is connected to a lower end portion of the positioning body portion 71, and the fixing plate portion 73 for fixing to the sewing machine body 2a is connected to an upper end portion of the positioning body portion 71.

As shown in fig. 4, the fixing plate portion 73 includes: a 1 st fixing plate portion 74 which is a plate bent at a right angle in a plan view and is fixed to the sewing machine body 2a; and a 2 nd fixing plate portion 75 extending in a form bent at right angles to the 1 st fixing plate portion 74 and connected to the positioning main body portion 71. Further, the 2 nd fixing plate portion 75 extends to the opposite side of the positioning main body portion 71 from the lower plate portion 72. The 1 st fixing plate 74 is parallel to the positioning body 71.

The lower plate portion 72 is disposed downstream of the needle plate 2t in the conveying direction X.

The conveying table 11 extends in a straight line in the conveying direction X in a plan view, and extends in the left-right direction in a range of the upstream side and the downstream side with respect to the sewing machine 2. In addition, a concave portion 11c recessed in a direction away from the sewing machine 2 is formed in the conveying table 11, and the lower plate portion 72 of the positioning plate 7 and the needle plate 2t are disposed in the concave portion 11 c.

The sewing machine body 2a is of a known structure, and winds an upper thread passing through the needle 8 and a lower thread supplied to the lower side of the needle plate 2t of the table 1, thereby forming a stitch on the object to be sewn 3 placed on the needle plate 2 t. In the present embodiment, the sewing machine body 2a is a chain stitch sewing machine, and performs serging sewing on one side of a rectangular object to be sewn by cooperation with the conveying device 4.

As shown in fig. 2 and 3, the sewing machine body 2a includes: a base portion 21 provided on the lower side with respect to the table 1; a column portion 22 standing from the base portion 21; and a sewing machine head 23 extending from an upper portion of the pillar 22 in a state of facing the base 21 above.

The sewing machine body 2a extends in the front-rear direction with the base portion 21 and the sewing machine head portion 23 separated vertically, and the pillar portion 22 extends vertically with the base portion 21 and the rear portion of the sewing machine head portion 23 sandwiched therebetween.

The base portion 21 includes a base housing 21a having an outer contour, and an internal mechanism accommodated in the base housing 21 a. The internal mechanism is a mechanism for winding the lower wire and the upper wire. A needle plate 2t having a needle hole 1h formed therein is provided on the upper surface of the base housing 21a as a part of the base housing 21 a.

The sewing machine head 23 includes a sewing machine head housing 23a forming an outer contour thereof, and an internal mechanism accommodated in the sewing machine head housing 23 a. The internal mechanism is a pointer up-and-down movement mechanism, a take-up lever driving mechanism, or the like. The sewing machine head 23 is disposed in a state in which a needle bar 23b of the needle bar driving mechanism protrudes downward from the lower surface of the top of the sewing machine head housing 23 a. The needle 8 is attached to the lower end of the needle bar 23b in a state extending downward.

The column section 22 includes a column housing 22a forming an outer contour thereof, and an internal mechanism housed in the column housing 22a. The internal mechanism is, for example, a mechanism for interlocking the internal mechanism of the sewing machine head 23 and the internal mechanism of the base part 21. The guide 5 is fixed to a surface of the column housing 22a (sewing machine body 2 a) located above the table 1 and facing the upstream side in the conveying direction X of the workpiece 3 via the bracket 6.

The bracket 6 is made up of a plurality of parts. As shown in fig. 4, the bracket 6 includes: a 1 st bracket 61 fixed to the column portion 22 of the sewing machine body 2a in a state extending toward the upstream side in the conveying direction X in a plan view; and a 2 nd bracket 62 fixed to a top portion (an end portion on an upstream side in the conveying direction X) of the 1 st bracket 61 and extending in a direction Y orthogonal to the conveying direction X toward directly above the table 1 in a plan view.

The 1 st bracket 61 is a metal plate bent to be opened downward. In more detail, as shown in fig. 2, the 1 st bracket 61 includes: two fixing

plate portions

61a, 61b arranged in parallel in a state separated in the conveying direction X; and a 1 st holder main body portion 61c extending along the conveying direction X in a state of connecting upper ends of the two fixing

plate portions

61a, 61 b. As shown in fig. 4, the 1 st holder main body 61c is formed to extend at right angles in a plan view. Specifically, the 1 st holder main body portion 61c includes: a 1 st plate portion 61d extending along the conveying direction X; and a 2 nd plate portion 61e extending from an upstream end of the 1 st plate portion 61d toward the table 1. Further, the fixing plate portion 61a on the downstream side of the two fixing

plate portions

61a, 61b is fixed to the column housing 22a of the sewing machine body 2a. On the other hand, the dimension of the upstream fixing plate portion 61b in the direction Y orthogonal to the conveying direction X is longer than the dimension of the downstream fixing plate portion 61a, and the 2 nd bracket 62 is fixed.

As shown in fig. 4, the 2 nd bracket 62 is a metal plate bent in an L-shape in a plan view. In more detail, the 2 nd bracket 62 includes: a 2 nd frame main body portion 62a fixed to the fixing plate portion 61b on the upstream side in the 1 st frame 61 and extending toward the upstream side of the needle plate 2t in a direction Y orthogonal to the conveying direction X; and a fixing plate portion 62b, the upstream end portion in the conveying direction X of which is connected to the distal end portion (tip portion) of the 2 nd rack main body portion 62a in a state extending along the conveying direction X. The guide 5 is fixed to the fixing plate portion 62b of the 2 nd bracket 62.

The guide 5 is a rigid body, in this embodiment a metal object. As shown in fig. 2 and 3, the guide 5 includes: a guide block 51 that guides the object 3 to be sewn 3 so as to approach the upper surface of the table 1, and extends along the conveying direction X; and a fixing block portion 52 extending upward from the guide block portion 51 and fixed to the bracket 6 (the fixing plate portion 62b of the 2 nd bracket 62). In the present embodiment, screw fixation is used for fixing the guide 5 and the bracket 6, fixing the bracket 6 and the sewing machine body 2a, fixing the positioning plate 7 and the sewing machine body 2a, and the like.

As shown in fig. 3, the fixing block portion 52 has a smaller dimension in the left-right direction than the guide block portion 51, and extends upward from the column portion 22 side on the upper surface of the guide block portion 51. As shown in fig. 2, the fixed block 52 has a dimension in the front-rear direction (conveying direction X) shorter than that of the guide block 51, and extends upward from the upstream side in the conveying direction X on the upper surface of the guide block 51.

As shown in fig. 2, the upper surface of the guide block 51 is recessed (lowered) stepwise in a portion downstream of the fixed block 52 in the conveying direction X with respect to a portion upstream of the fixed block in the conveying direction X.

The lower surface of the guide block 51 (lower surface of the guide 5) includes: a 1 st guide surface 51a that gradually descends (approaches the table 1) toward the conveyance direction X of the sewing object 3; and a 2 nd guide surface 51b adjacent to the 1 st guide surface 51a on the downstream side in the conveying direction X of the sewn object 3 and parallel to the upper surface of the table 1.

The arrangement region 5a of the guide 5 in a plan view will be described below with reference to fig. 6. First, the preconditions for determining the arrangement area 5a of the guide 5 are 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. Also, in the example of fig. 6, the needle drop region 1a is circular. In the present embodiment, the needle hole 1h is an elongated long hole having a form including the needle fall region 1a as a part thereof, and is a long hole long in the left-right direction. The needle hole 1h is larger than the outer periphery of the needle 8 so as not to contact the needle 8, and more specifically, is slightly longer in the front-rear direction than the needle drop region 1a, and is sufficiently longer in the left-right direction than the needle drop region 1 a. Since the outer shape of the hole 1h is a boundary separating the inside and outside of the region of the pinhole 1h in plan view, the pinhole 1h is the pinhole region 1h in plan view. The pinhole area 1h on the table 1, i.e., the pinhole area 1h in a plan view is larger than the needle drop area 1 a.

The conveying region 41L of the clamp portion 41 is a region parallel to the conveying direction X, and is separated from the needle drop region 1a on the opposite side of the pillar portion 22 of the sewing machine body 2a in the direction Y orthogonal to the conveying direction X.

In addition, two areas are set.

The 1 st reference area L1 is an area passing through the needle drop area 1a in the direction Y orthogonal to the conveying direction X.

The 2 nd reference area L2 is an area passing through the needle drop area 1a in the conveying direction X.

A space region L3 is formed between the conveying region 41L of the nip 41 and the needle drop region 1a in a direction Y orthogonal to the conveying direction X of the nip 41. The spatial region L3 is a region where no object is literally present. The spatial region L3 is a part of the 1 st reference region L1. In the present embodiment, the space region L3 is formed not only between the conveying region 41L of the nip 41 and the needle drop region 1a, but also between the conveying region 41L of the nip 41 and the needle hole region 1h.

The arrangement region 5a of the guide 5 in the present embodiment is as follows in a plan view. As shown in fig. 6, the arrangement region 5a of the guide 5 is rectangular, and is shown by the region interspersed with dots in fig. 6. The pinhole region 1h is disposed apart from the disposition region 5a of the guide 5 on the downstream side in the conveyance direction X. The entire arrangement region 5a of the guide 5 is arranged on the upstream side in the conveying direction X separately from the 1 st reference region L1 including the needle drop region 1a as a part thereof. That is, the arrangement region 5a of the guide 5 is arranged only on the upstream side in the conveying direction X with respect to the 1 st reference region L1. Since the 1 st reference region L1 includes the space region L3, the arrangement region 5a of the guide 5 is formed in a region other than the space region L3.

The placement area 5a of the guide 5 and the 2 nd reference area L2 partially overlap. More specifically, the 2 nd reference region L2 is formed to pass through the middle portion in the front-rear direction (direction Y orthogonal to the conveying direction X) of the arrangement region 5a of the guide 5. The arrangement region 5a of the guide 5 includes: a region overlapping with the 2 nd reference region L2; a region protruding toward the conveying region 41L side of the nip 41 with respect to the 2 nd reference region L2; and a region protruding to the opposite side of the conveying region 41L of the nip 41 with respect to the 2 nd reference region L2.

The arrangement region 5a of the guide 5 in plan view satisfies the following condition: conditions around the needle drop zone 1a, and conditions of the conveying zone 41L away from the grip portion 41.

If the guide 5 is not located around the needle drop area 1a, it cannot guide the object to be sewn directly under the needle 8 during sewing, and a sewing failure is likely to occur. Further, since the holding portion 41 of the conveying device 4 presses the object to be sewn to the table 1, the holding portion 41 functions to prevent the object to be sewn 3 from being lifted together with the needle 8. The guide 5 also helps to prevent the object 3 from being lifted up together with the needle 8.

Further, if the arrangement region 5a of the guide 5 is not separated from the conveying region 41L of the clamp portion 41, the clamp portion 41 collides with the guide 5, and therefore if at least one of the clamp portion 41 and the guide 5 is not an elastic body, conveyance is affected, and the clamped state becomes unstable or the action of the guide 5 becomes unstable due to the collision, which is not preferable.

In order to bring the conveying region 41L of the grip portion 41 as close to the needle 8 (needle drop region 1 a) as possible, it is preferable that the arrangement region 5a of the guide 5 be shortened as much as possible by an amount protruding toward the conveying region 41L side of the grip portion 41 as compared with the 2 nd reference region L2 or that the end of the arrangement region 5a on the conveying region 41L side of the grip portion 41 coincide with the 2 nd reference region L2.

In the sewing device of the first embodiment, the arrangement region 5a of the guide 5 satisfies the respective conditions, and particularly, the space region L3 is provided between the needle hole region 1h including the needle drop region 1a and the conveying region 41L of the clamp portion 41, so that the conveying region 41L of the clamp portion 41 can be brought closer to the needle 8 while keeping a state of being away from the arrangement region 5a of the guide 5. In the sewing device of the first embodiment, the arrangement region 5a of the guide 5 satisfies the condition that it is located only on the upstream side in the conveyance direction X than the 1 st reference region L1 or the pinhole region 1h, and therefore, can be set in a narrower range than in other embodiments described later.

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

The arrangement region 5b of the guide 5 is L-shaped in plan view, and is arranged apart from the needle hole region 1h including the needle drop region 1a on the opposite side of the conveying region 41L of the nip portion 41 and on the upstream side in the conveying direction X. In more detail, the arrangement region 5b of the guide 5 includes: a 1 st arrangement region a extending along a direction Y orthogonal to the conveying direction X of the sewing object 3 at a position separated from a 1 st reference region L1 and a pinhole region 1h including the needle falling region 1a as a part thereof on an upstream side in the conveying direction X; and a 2 nd arrangement region B extending along the conveying direction X in a state of intersecting the 1 st reference region L1 at right angles on a side opposite to the conveying region 41L of the nip 41 with respect to the 2 nd reference region L2 and the pinhole region 1h.

The 1 st arrangement area a is the same as the arrangement area 5a of the guide 5 in the first embodiment.

The 2 nd arrangement region B extends over the range of the 1 st reference region L1 and the pinhole region 1h on the upstream side and the downstream side in the conveyance direction X.

In the sewing device of the second embodiment, since the arrangement region 5b of the guide 5 includes the 1 st arrangement region a, a part of the arrangement region 5b of the guide 5 (1 st arrangement region a) is arranged on the upstream side in the conveying direction X separately from the 1 st reference region L1 and the pinhole region 1h including the needle drop region 1a as a part thereof. The arrangement region 5b of the guide 5 is formed in a region other than the space region L3, similarly to the arrangement region 5a of the first embodiment. The arrangement region 5b of the guide 5 satisfies the following condition in plan view: conditions around the needle drop zone 1a, and conditions of the conveying zone 41L away from the grip portion 41.

Further, the portion of the lower surface of the guide 5 of the second embodiment where the 1 st arrangement region a is formed is the same as the lower surface of the guide 5 of the 1 st embodiment. That is, the upstream side portion in the conveying direction X in the 1 st arrangement area a in the lower surface is the 1 st guide surface 51a (a surface that approaches the table 1 as gradually descending toward the conveying direction X), and the downstream side portion in the conveying direction X in the 1 st arrangement area a in the lower surface is the 2 nd guide surface 51b (a surface parallel to the upper surface of the table 1). In addition, the portion of the lower surface of the guide 5 in the second embodiment where the 2 nd arrangement region B is formed is the 1 st guide surface 51a at the upstream end portion in the conveying direction X, and the 2 nd guide surface 51B in addition. The 1 st guide surface 51a in the portion where the 2 nd arrangement region B is formed and the 1 st guide surface 51a in the portion where the 1 st arrangement region a is formed are connected in the direction Y orthogonal to the conveying direction X.

In addition, the portion of the lower surface of the guide of the second embodiment on the upstream side of the needle drop region 1a in the conveying direction X mainly functions as the guide 5 for guiding the object to be sewn directly under the needle 8 at the time of sewing, and the other portion only functions to prevent the object to be sewn 3 from being lifted up together with the needle 8.

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

The arrangement region 5C of the guide 5 is U-shaped in plan view, and has a 3 rd arrangement region C at a position separated from the 1 st reference region L1 and the pinhole region 1h in the conveying direction X, in addition to the 1 st arrangement region a and the 2 nd arrangement region B, the 3 rd arrangement region C extending from the downstream side of the 2 nd arrangement region B toward the conveying region 41L of the nip 41 in the direction Y orthogonal to the conveying direction X.

The 3 rd arrangement region C is arranged opposite to the 1 st arrangement region a with the pinhole region 1h as the center. The 3 rd arrangement region C is also distant from the conveying region 41L of the nip 41 in the direction Y orthogonal to the conveying direction X.

In the sewing device of the third embodiment, since the arrangement region 5c of the guide 5 includes the 1 st arrangement region a, a part of the arrangement region 5c of the guide 5 (1 st arrangement region a) is arranged on the upstream side in the conveying direction X separately from the 1 st reference region L1 and the pinhole region 1h including the needle drop region 1a as a part thereof. The arrangement region 5c of the guide 5 is formed in a region other than the space region L3. The arrangement region 5c of the guide 5 in plan view satisfies the following condition: conditions around the needle drop zone 1a, and conditions of the conveying zone 41L away from the grip portion 41.

In addition, the portion of the lower surface of the guide 5 of the third embodiment where the 3 rd arrangement region C is formed is a 2 nd guide surface 51b (a surface parallel to the upper surface of the table 1).

In addition, the portion of the lower surface of the guide 5 on the upstream side in the conveying direction X of the needle drop region 1a of the third embodiment mainly functions to guide the object to be sewn directly under the needle 8 at the time of sewing of the guide 5, but the other portion only functions to prevent the object to be sewn 3 from being lifted up together with the needle 8.

As shown in fig. 9, in the sewing apparatus according to the fourth embodiment of the present invention, each detailed portion of the table 1, the sewing machine 2, and the conveying device 4 is different from that of the sewing apparatus according to the first embodiment. However, the portion of the sewing device of the fourth embodiment related to the arrangement region 5a of the guide 5 remains the same as the sewing device of the first embodiment.

The table 1 is constituted by a single 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 is not provided with the positioning plate 7 of the first embodiment. Since the positioning plate 7 is not provided, the end of the object 3 to be sewn can be sewn closer to the pillar 22 side of the sewing machine body 2a than the sewing machine 2 of the first embodiment provided with the positioning plate 7.

In the fourth embodiment, the sewing machine body 2a is a flat-bed sewing machine, and forms a straight line stitch having an eyelet shape on the object 3 by cooperation with the conveyor 4.

In the conveying device 4, the grip portion 41 is formed longer in the conveying direction than in the first embodiment, in correspondence with the size of the sewn article 3. Further, for example, in the case where the object 3 is one piece of fabric, the clamp portion main body 41a may be constituted by only a plate, but in the case where the object 3 is two pieces of fabric overlapped up and down, it is preferable to adopt a structure including a sewing needle penetrating the upper and lower fabric and a plate in which the sewing needle protrudes from the lower surface.

The present invention is not limited to the above-described embodiments, and can be appropriately modified within a range not departing from the gist thereof. For example, the pinhole 1h has an elongated long hole shape in the present embodiment, but the present invention is not limited to this, and may have other shapes represented by a circular hole. In the present embodiment, the conveying device 4 uses a multi-axis articulated robot as the conveying unit 42, but the present invention is not limited to this, and a device that conveys the gripping unit along only one line may be used. In this case, the conveying direction of the nip portion coincides with the conveying direction X of the sewn object 3.

Claims

1. A sewing apparatus, comprising:

a work table (1);

a sewing machine body (2 a);

a conveying device (4) which conveys the sewn object (3) from the upstream side to the downstream side relative to the sewing machine main body (2 a) while pressing the sewn object against the workbench (1); and

a guide (5) for guiding the object (3) to be sewn so that the object (3) to be sewn approaches the upper surface of the table (1),

the conveying device (4) comprises: a clamping part (41) for pressing the sewed object (3) on the workbench (1); and a conveying unit (42) that conveys the clamping unit (41),

a space region (L3) is formed between a conveying region (41L) and a needle falling region (1 a) of a clamping part (41) on the workbench (1) in a plane view in a direction (Y) orthogonal to a conveying direction (X) of the sewed object (3),

the arrangement areas (5 a, 5b, 5 c) of the guide (5) in a plan view satisfy the following conditions: the arrangement regions (5 a, 5b, 5 c) are located in a region other than the space region (L3), and the arrangement regions (5 a, 5b, 5 c) include at least a region upstream of the needle drop region (1 a) in the conveying direction (X) of the sewn article (3).

2. The sewing apparatus of claim 1, wherein:

the arrangement areas (5 a, 5b, 5 c) of the guide (5) in a plan view satisfy the following conditions: the arrangement regions (5 a, 5b, 5 c) are located in the vicinity of the needle drop region (1 a), and the arrangement regions (5 a, 5b, 5 c) are located away from the conveying region (41L) of the nip portion (41).

3. The sewing apparatus of claim 2, wherein:

the region passing through the needle drop region (1 a) in a direction (Y) orthogonal to the conveying direction (X) of the clamping part (41) is set as a 1 st reference region (L1),

the arrangement region (5 a) of the guide (5) in plan view satisfies the following conditions: the reference area (L1) is only an area on the upstream side of the conveyance direction (X) of the sewn object (3).

4. A sewing apparatus according to any one of claims 1-3, wherein:

the guide (5) is fixed to a surface of the sewing machine body (2 a) on an upstream side in the conveying direction (X) of the sewn object (3) via a bracket (6).

5. A sewing apparatus according to any one of claims 1-3, wherein:

the conveying device (4) is the only device for conveying the sewed objects (3).

6. The sewing apparatus of claim 4, wherein: