KR101116971B1 - Sewing machine foot and sewing machine - Google Patents

Abstract

The foot mounting portion 44 fixed to the pressing rod 14 of the sewing machine to the sewing machine foot, the pressing portion 46 for pressing the object to be sealed when the sewing needle 12 penetrates, and the element train of the slide fastener 8 (9) a vertical plane having an element guide groove 42 for inserting and guiding, pivotally supported by the foot mounting portion 44 so as to be relatively oscillable with the foot mounting portion 44, and parallel to the seam 28 during sewing. Pressing means 52 which is disposed between the swinging arm 47 and the foot mounting portion 44 and the swinging arm 47 swinging therein, and presses the swinging arm 47 toward the object to be loaded with respect to the foot mounting portion 44. ). This makes it possible to guide the element rows 9 of the slide fastener 8 both at the time of the penetration of the sewing needle 12 and at the time of forming the seam, and the thick dough 6 and the concealed slide fastener which are difficult to sew. (8) can be accurately positioned and sewed.

Push Rod, Foot Mount, Compression Section, Swing Arm, Sewing Needle

Description

Sewing machine foot and sewing machine {SEWING MACHINE FOOT AND SEWING MACHINE}

The present invention provides a lower feed tooth provided on the lower surface side of the needle plate of the sewing machine, and an upper feed device that moves in association with the lower feed tooth on the upper surface side of the needle plate of the sewing machine. The present invention relates to a sewing machine foot applied to a sewing machine for sewing by sandwiching a to-be-sealed object between upper and lower sides, and a sewing machine having the sewing machine foot.

Conventionally, a pair of guide grooves are formed in the central portion of the rear surface side of the fastener tape pressing portion so as to face each other with an intermediate partition formed in the longitudinal direction therebetween, and a needle hole is formed in the direction of the front end of the tape portion of the tape pressing portion. Further, the lower end face of the intermediate partition portion is formed to be slightly lower than the tape pressing surface on the back surface of the tape pressing portion, and the intermediate partition portion is projected forward from the front end portion of the tape pressing portion or the front end side entrance of the guide groove is formed. Background Art A sewing machine foot for attaching a concealed slide fastener which is formed in a wide flare shape is known. In particular, in this sewing machine foot, a sewing machine foot for attaching a concealed slide fastener is formed, for example, in a front end of the intermediate partition, a swelling part expanded in a height direction and a width direction. It is proposed by the -54462 publication (patent document 1).

When sewing the concealed slide fastener to the sewing object using the sewing machine foot described in Patent Document 1, the upper ear portion folded back into the U-shape of the concealed slide fastener is first inserted into the guide groove to start sewing. The lower surface of the bulge formed at the distal end of the intermediate partition is sewn while pressing the fastener tape before sewing, and thus the fastener element can be guided to the guide groove. The fastener element can be stably guided to the guide groove even in a space part in which the fastener element is excluded or a part in which a so-called upper stopper is formed by crushing the fastener element made of thermoplastic resin using ultrasonic processing or the like. It is said.

Therefore, according to the sewing machine foot described in Patent Document 1, at the start of sewing attachment of the concealed slide fastener, an intermediate section of the tape pressing portion is provided in the thin portion of the upper portion of the upper portion formed by crushing the space portion of the upper portion of the slide fastener or the fastener element. It is said that the part rises and the slide fastener comes out of the guide groove and the problem that sewing is disturbed can be prevented.

In addition, in order to realize the positive pinching of the sewing material and the provision of the conveying force, the narrowing pressure between the upper and lower conveying teeth and the upper and lower conveying teeth is reduced by applying or reducing the pressing force of the upper conveying teeth toward the needle plate. The upper conveying apparatus of the sewing machine provided with the pressure regulation means to adjust is disclosed by Unexamined-Japanese-Patent No. 5-74474 (patent document 2), for example.

In the sewing machine upper conveying apparatus described in Patent Document 2, it is possible to reliably tighten the sewing material and to impart a conveying force, and to follow the thickness change of the sewing material well, so that there is no defect portion such as sewing misalignment or damage to the dough. It is said that quality sewing products can be obtained stably.

Patent Document 1: Japanese Utility Model Application Laid-open No. 54-54462

Patent Document 2: Japanese Utility Model Application Laid-open No. Hei 5-74474

In the case where the slide fastener is sewn to the dough, the fastener tape and the sewing attachment portion of the dough are piled up and down, and the overlapped to-be-processed object is fed to the needle drop position of the sewing needle to perform sewing work. By the way, for example, when sewing a fastener tape to a thick sewing material such as a thick woven fabric or leather, such as a car seat, when the sewing is performed using the sewing machine foot described in Patent Document 1, the dough is thick and strong, When the fastener tape cannot be fed to the needle drop position reliably, the dough and the fastener tape may displace, which may cause a problem that the position of the seam or the seam is not stable, and is inappropriate as a thick dough sewing machine foot. There was.

In particular, when sewing a so-called concealed slide fastener which hides a line of elements and seams of the fasteners from the surface, between the end edges of the left and right element installation corner portions bent in a U shape at the time of engaging the fastener elements after sewing. Since a gap is created and the fastener element is avoided to be exposed, a strict management is required to narrow the gap between the fastener element string and the seam as much as possible. However, since the sewing machine foot described in Patent Document 1 is mainly for thin dough, when sewing a portion where the thickness of dough is changed, such as sewing a curved portion or overlapping portions of dough, etc. There was a possibility that it would be difficult to manage the gaps strictly, and there was room for improvement in sewing thick dough.

In addition, as a method of sewing thick dough, a vertical conveying method for discharging dough by using a sewing machine foot, an outer pressing part, and a lower conveying tooth part in combination is used. However, in the case of this conveying method, the sewing machine foot, the outer pressing portion and the lower conveying tooth portion are once separated from the dough when conveying the dough, so that the element train of the fastener cannot be continuously guided to the guide groove, so that the fastener element The gap between heat and seam could not be managed strictly.

The present invention has been made to solve the problems of the prior art, and when penetrating the sewing needle, presses the dough with a predetermined pressing force, raises the sewing needle to form a seam to form a seam, In a sewing machine foot that releases the pressing force and moves relatively to the dough, it is particularly evident that even the concealed slide fastener continuously passes the element fastening of the slide fastener through the element guide groove both during penetration and seam formation. It is an object of the present invention to provide a sewing machine foot having a sewing machine foot and a sewing machine foot.

In order to achieve the above object, the first basic configuration of the sewing machine foot according to the present invention, in order to maintain the distance between the element string of the slide fastener and the seam seam, the foot mounting portion fixed to the pressing rod of the sewing machine, together with the foot mounting portion A sewing machine foot having a pressing part for performing a vertical movement to press a sewing object when penetrating the sewing needle, and an element guiding groove for guiding up and down movement in conjunction with the foot mounting portion and inserting and guiding a row of elements of the slide fastener. A swinging arm having a groove, pivotally supported by the foot mounting portion so as to be able to swing relatively to the foot mounting portion, and swinging in an up and down direction, for example, in a vertical plane parallel to the seam during sewing, and between the foot mounting portion and the swinging arm; And pressing means for pressing the swinging arm toward the object to be sealed with respect to the foot mounting portion. I am doing it.

And the sewing machine foot which concerns on this invention is that at least one part of the said element guide groove | channel is a case where the sewing machine foot is in the upper position and the lower position by the press means pushing the said rocking arm toward the said to-be-sealed object. It is characterized in that it is formed to guide a part of the element string.

Further, in such a configuration, it is preferable to form a groove having a parallel side surface in which the element guide groove of the sewing machine foot is opened with respect to the to-be-sealed object, and when sewing a concealed slide fastener, It is preferable to provide an element inverting portion for arranging element rows of the concealed slide fastener at the opening end of the groove to invert the element attaching corner portion bent in a U shape to an angle of 90 degrees or more.

Preferably, the pressing portion is formed on a part of the swinging arm, and forms a needle hole through which the sewing needle passes through the pressing portion of the sewing machine foot, and at the same time, the fastener is formed in the element guide groove on the rear side of the sewing attachment portion rather than the needle hole. It is preferable to have an element covering part which avoids fitting with an element row.

Moreover, in the said structure, when a foot mounting part raises and a rocking arm rotates in the direction of the to-be-sealed object by the action of a pressing means, it is preferable to provide the sliding surface which contacts the surface of a to-be-sealed object in the front part of a rocking arm. And a forward inclined portion having an inclined surface inclined upwardly with respect to the lower surface of the swinging arm at the distal end of the sliding surface, and having an inclined surface that performs an operation of climbing on the to-be-sealed material; It is preferable to form an inversion part. In addition, the width of the sliding surface may be set smaller than the width of the pressing portion. Moreover, it is preferable to equip the rear end of the press part of a sewing machine foot with the retreat inclination part which performs the operation | movement which climbs with respect to a to-be-processed object. As the pressing means for pressing the swinging arm toward the object to be sealed against the foot mounting portion, an elastic material composed of a compression spring, a leaf spring, or the like may be used.

In addition, the second basic configuration of the present invention, in order to maintain the distance between the line of the elements of the slide fastener and the sewing line, the foot mounting portion fixed to the pressing rod of the sewing machine, and the up and down movement together with the foot mounting portion to be sealed during the penetration of the sewing needle It is pivotally supported by the pressing portion for pressing the product, the element guide groove for inserting and guiding the elements of the slide fastener to move up and down in conjunction with the foot mounting portion, and the foot mounting portion so as to be relatively swingable with the foot mounting portion. A rocking arm having said element guide groove, which swings in a vertical plane parallel to the seam, and is disposed between the foot mounting portion and the rocking arm, and has pressing means for urging the rocking arm against the foot mounting portion toward the sewing object. It is a sewing machine provided with a sewing machine foot.

Since the sewing machine foot according to the present invention has the first basic configuration, sewing is carried out using a so-called comprehensive conveying method, through which a dough is inserted between the lower conveying teeth and the pressing portion of the sewing machine foot to convey the dough. At the time of penetrating the sewing needle, the element string may be guided to the element guide groove of the sewing machine foot to penetrate the sewing needle while setting the interval with the sewing needle. In addition, when forming the transfer portion of the seam, the dough is sandwiched between the outer pressing portion and the needle plate to be fixed to the sewing machine side, and the sewing needle, the lower feed tooth portion, and the pressing portion of the sewing machine foot are separated from the dough, and the operation is not performed. In the present invention, however, even when the mounting portion of the sewing machine foot is raised, since the swinging arm is inclined forwardly downward, at least a part of the element guide groove can be brought into continuous contact with the element row of the fastener. Thereafter, when the push rod is lowered, it is possible to prevent the problem that element heat is released from the element guide groove and collapsed from the pressing portion. Therefore, at any state position when the pressing rod is raised at the time of sewing and when the pressing rod is lowered, at least a part of the element guide groove continues to guide the string of elements of the fastener, between the seam and the string of elements of the fastener. Can maintain the interval. Therefore, even if the sewing machine foot is able to continue guiding the element row in the element guide groove even in a comprehensive conveying system in which the sewing machine foot moves up and down, even when the fastener is sewn into a thick dough, the portion close to the engaging head of the fastener element can be stably It can sew, and it can prevent the disturbance of sewing.

In addition, the needle is inserted between the needle plate and the pressing portion of the sewing machine foot, and the sewing needle penetrates the sewing needle using the so-called up-and-down conveying method, which penetrates the sewing needle while fixing the dough with the sewing machine body. Nearly the entire surface can penetrate in contact with the fastener's rows of elements while setting the gap with the sewing needle. In addition, when forming the seam feed portion, the pressing portion of the sewing needle and the sewing machine foot is spaced apart from the dough, and the dough is sandwiched between the outer pressing portion and the lower feed tooth, and the transfer is performed. Even if it is spaced apart from the dough in conjunction with the sewing needle, since the swinging arm is inclined forwardly descending, the element row can be continuously fitted into the element guide groove. Therefore, even when forming the conveying portion of the seam, the element guide grooves retain the guide of the element row, so that the element row does not deviate from the element guide groove, and furthermore, the gap between the sewing position and the element row can be defined. Therefore, even when the sewing machine foot is vertically transported in which the machine moves up and down, the element row can be continuously guided by the element guide groove, so that even when the fastener is sewn to a thick dough, the portion close to the engaging head of the fastener element is stably sewn. It is possible to prevent the disturbance of sewing.

Further, as the element guide groove of the sewing machine foot, an element guide groove having an open side with respect to the to-be-sealed material and having a parallel side surface is formed, which makes it possible to pass through the guide groove in a state where the element row is kept in a predetermined shape. You can specify the spacing between and the column of elements. In addition, in the case of the concealed slide fastener formed in the U shape, an element inverting part is provided at the open end of the element guide groove, whereby the element attaching edge portion of the fastener tape formed by forming a row of elements and being bent into a U shape is 90 degrees. If it reverses to the above angle and stands up, the fastener tape of the concealed slide fastener which is difficult to sew can be sewed while positioning correctly also about thick dough.

In addition, by forming an element escape portion that avoids fitting with the element row at the back side of the sewing attachment portion rather than the needle hole through which the sewing needle passes, the element row after sewing is guided to the element row after sewing even when the pressing portion is formed in a part of the swinging arm. Opening from the groove can facilitate sewing of the curved portion. Therefore, even when sewing a fastener tape to thick dough and sewing the curved portion, sewing can be performed easily and accurately.

In addition, when the oscillating arm rotates in the direction of the object to be sealed by releasing the pressing force at the time of penetration through the action of the pressing means, the front surface of the swinging arm has a sliding surface which contacts the surface of the object to be sealed. When forming a conveyance part, the element row | line | column and element guide groove | channel can be made favorable, and it can prevent the seam pitch and the seam bend. Furthermore, by providing a forward inclined portion which has an inclined surface inclined upwardly with respect to the lower surface of the swinging arm and performs an operation of climbing on the sewing object at the tip of the sliding surface, even when the thickness of the sewing object is thickened in the middle, This can be surely done, and it is possible to prevent the sewing from being disturbed. Also, by forming the element inverting portion on the side of the sliding surface in the forward inclined portion, even when forming the seam conveying portion, part of the element guide groove always guides the element row continuously, so that the element row even when the sewing machine foot is raised. The gap between the sewing position and the element row is precisely defined even when sewing the sewing machine foot descends without departing from the element guide groove. In addition, by setting the width of the sliding surface to be narrower than the width of the pressing portion, and avoiding interference with the needle plate of the sewing machine or the lower feed teeth, damage to the sliding surface can be prevented. Therefore, it is possible to prevent the sewing from being disturbed due to the damage of the sliding surface.

Further, by providing the reclining inclined portion at the rear end of the pressing portion of the sewing machine foot to perform the operation of climbing on the object to be sewing, it is possible to easily feed the dough into the pressing portion even when the feed is retracted and the sewing is attached. Moreover, even when sewing dough with a different thickness, sewing of retreat can be performed reliably without being caught. In addition, by adopting an elastic material such as a compression spring or a leaf spring to the pressing means for pressing the swinging arm toward the object to be mounted on the foot mounting portion, a mechanism for fitting the element guide groove into the element row can be compactly configured.

Further, the sewing machine foot of the present invention has a pivot axis pivotally pivotally supporting the swinging arm including the element guide groove in a vertical plane parallel to the seam, and pressing means for pressing the element guide groove to the workpiece. When applied to the sewing machine for the sewing needle, the entire surface of the element guide groove of the sewing machine foot can be penetrated while determining the interval with the sewing needle in contact with the element row. Then, when the pressing portion of the sewing machine foot is spaced apart from the dough and moved relatively to the dough to form the conveying portion of the seam, the swinging arm swings forward and downward so that the element guide groove can continuously contact the element row. Therefore, even when forming the conveying portion of the seam, the element guide groove can continue to guide the element row, thereby defining the gap between the sewing position and the element row. Therefore, even when sewing a thick cloth and a fastener, the disturbance of sewing can be prevented.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view of the needle drop position vicinity in the sewing machine provided with the sewing machine foot which concerns on 1st Example of this invention.

2 is an exploded perspective view of the sewing machine foot according to the first embodiment of the present invention.

3 is a cross-sectional view near the needle drop position in a state where the sewing needle and the sewing machine foot are descending.

It is sectional drawing of the needle drop position vicinity in the state which the sewing needle and sewing machine foot are raising.

FIG. 5 is a view showing a V-V section near the needle drop position shown in FIG. 3.

It is a figure which shows the cross section of the needle drop position vicinity when sewing a normal slide fastener to dough.

FIG. 7 is a view showing a state in which the slide fastener shown in FIG. 6 is sewn to thick dough, and the dough is folded around the sewing portion to sew the sewing portion.

8 is a diagram showing the timing of a comprehensive transfer method for discharging dough by complex movement of the sewing machine foot, the outer press, the sewing needle, and the lower transfer tooth.

Fig. 9 is a chart showing the timing of the up-and-down conveying method for discharging dough by moving the outer pressing part and the lower conveying tooth part.

FIG. 10 is a timing chart schematically showing the up-and-down operation and the front-rear operation of each member with the horizontal axis as the main axis angle of the sewing machine with respect to the timing of the integrated transport method shown in FIG. 8.

FIG. 11 is a timing chart schematically showing the up-and-down operation and the front-rear operation of each member with the horizontal axis as the main axis angle of the sewing machine with respect to the timing of the up-down conveying method shown in FIG. 9.

Fig. 12 is an exploded perspective view of a sewing machine foot according to a second embodiment of the present invention, having a forward inclined portion inclined upwardly of the leading end of the sewing machine foot and a retracting inclined portion inclined upwardly.

FIG. 13 is a perspective view of the sewing machine foot shown in FIG. 12 viewed from the bottom surface thereof. FIG.

It is sectional drawing of the needle drop position vicinity which a foot mounting part raises and a sliding surface slides on the surface of a slide fastener, and forms the conveyance part of a seam.

It is a figure which looked at the sewing machine foot from the front of the seam line, and shows the XV-XV cross section shown in FIG.

It is sectional drawing which cut | disconnected the rocking arm of the sewing machine foot by XVI-XVI shown in FIG.

Fig. 17 is an exploded perspective view showing the sewing machine foot of the third embodiment, which is provided with the pivoting head and at the distal end of the swinging arm.

18 is a side view of the sewing machine foot taken from the side of the seam, taken in cross section with respect to the slide fastener, dough, needle plate and lower feed teeth.

19 is a perspective view showing a fourth embodiment of the present invention in which the rotatable roller head is provided at the tip end of the swinging arm.

[Description of the code]

6: dough

8, 108: Slide Fastener

9, 109: element string

10: sewing

12: sewing needle

14 push rod

16: outer press

22: middle pressing part

24: upper pressing device

26: needle plate

28: seam

40, 140, 240, 340, 440: sewing machine foot

42, 142, 242, 342, 386, 486: Element guide groove

43: mounting hole

44: foot mounting

45: mounting screw

46, 246, 346, 446: compression

47, 147, 247, 347, 447: rocking arm

48: spit hole

50, 382, 482: pivot axis

53: bearing

54: bearing

56: spring seat

52: compression spring

57: rear stopper

58: lower feed tooth

59: front stopper

60, 260, 360: sliding surface

128, 129: sewing

262: slope

263: forward slope

264 retreat slope

270 element escape

380 rocking head

383, 384: Bearing

480: Roller Head

B: interval

E: distance

H1, H2, H3: Length

L: conveying direction of dough

EMBODIMENT OF THE INVENTION Hereinafter, typical embodiment of the sewing machine foot which concerns on this invention is described concretely based on an Example, referring drawings. In addition, in the following embodiment, when the sewing machine foot and the sewing needle reciprocate in the sewing direction and perform the up-and-down movement, and the total conveyance which an outer press part moves up and down, the sewing machine foot and the sewing needle move up and down, and the outer side The two driving methods in the case of the up-and-down conveyance in which the pressing portion reciprocates in the up-down movement and the sewing direction, the structure of the sewing machine foot, the sewing needle and the outer pressing portion are substantially unchanged, and will be described from time to time.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view of the needle drop position vicinity in the sewing machine provided with the sewing machine foot which concerns on 1st Example of this invention. In this Example, the specific example at the time of sewing the concealed slide fastener 8 (sealed material) to the thick dough 6 (sealed material) using the sewing machine is shown. The dough 6 is, for example, fabric paper such as an automobile seat or thick dough such as leather. One end of the concealed slide fastener 8 has a shape inverted to a U shape, and coil-shaped element rows 9 are sewn to the side edges of the fastener tape inverted to a U shape. In addition, in the Example shown in FIG. 1, the structure of the sewing thread used at the time of sewing is abbreviate | omitted.

As shown in FIG. 1, the sewing unit 10 of the sewing machine includes a pressing rod 14 which performs up and down movements in conjunction with the movement of the sewing needle 12 before and after and up and down, and is fixed to the pressing rod 14 by a sewing needle. The sewing needle 12 is interlocked with the sewing machine foot 40 and the sewing needle 12 or the sewing machine foot 40 when the sewing needle 12 contacts the sewing object 12 and penetrates the sewing object 12. Alternatively, the movement of the sewing machine foot 40 moves up and down almost in reverse, and the sewing machine foot 40 is provided with an outer pressing portion 16 which serves to press the sewing object when forming a seam without pressing the sewing object. As shown in FIG. 1, the press bar 14 and the sewing machine foot 40 comprise the intermediate | middle press part 22 which presses the circumference | surroundings of the penetrating part of a to-be-sealed object. Moreover, the intermediate | middle press part 22 and the outer press part 16 comprise the upper press apparatus 24 for forming the penetration part and seam which alternately move up and down and penetrate a sewing needle. Below the upper pressing device 24, a needle plate having a hole to pass the sewing object 12 through the lower part and an opening for protruding a lower conveying device (not shown) through which the sewing needle 12 is passed from the lower side. (26) is provided.

2 is an exploded perspective view of the sewing machine foot 40 according to the present invention.

As shown in Fig. 2, the sewing machine foot 40 inserts the sewing machine foot 40 into the mounting hole 43 in the pressing rod 14 of the sewing machine and turns the mounting screw 45 to tighten the split fastening portion. A foot mounting portion 44 for fixing the sewing machine foot 40 to the pressing rod 14, a pressing portion 46 for pressing the sewing object with a predetermined pressing force upon penetration of the sewing needle 12, and a slide fastener; The element guide groove 42 guiding through the element row 9 of the swivel arm, and the swinging arm 47 pivotally pivotable in a vertical plane parallel to the seam 28, ie up and down relative to the foot mount 44 The pivot shaft 50 which supports is provided, and the compression spring 52 (pressing means) which presses the element guide groove | channel 42 to a to-be-sealed material. The opening part which introduce | transduces the element string 9 of the concealment fastener into the element guide groove 42 is provided with the element inversion part which raises the element string 9 bent and formed in U shape, and inverts it to an angle of 90 degrees or more. In the embodiment shown in FIG. 2, although the element guide groove 42 is formed in the swinging arm 47, the needle hole 48 and the pressing portion 46 for passing the sewing needle 12 are formed, The part 46 may be provided in the foot mounting part 44 which does not rock.

Bearings supporting the pivot shaft 50 on the rear end upper side of the swinging arm 47 and the rear end lower side of the foot attaching section 44 when the upstream side in the conveying direction of the dough is the front side and the downstream side rearward. 53 and the bearing 54 are drilled and installed. By constituting the sewing machine foot 40 in this manner, the swinging arm 47 can be made to swing around the pivot shaft 50 with respect to the foot mounting portion 44. In addition, a needle hole 48 penetrating in the vertical direction of the swing arm 47 is formed in the middle portion of the front end portion and the rear end portion of the swing arm 47, and the needle hole 48 and the pivot shaft 50 are formed. The compression spring 52 (pressing means) is provided in the spring sheet 56 provided in the range between. This compression spring 52 is arrange | positioned between the surface of the rear end lower part of the foot mounting part 44, and the upper surface of the swinging arm 47, and presses the swinging arm 47 downward, and the foot mounting part 44 was raised. Even in this case, since the swinging arm 47 forming the element guide groove 42 rotates about the pivot axis 50, the opening of the element guide groove 42 can be brought into continuous contact with the element row 9. Can be. Thereafter, when the push bar 14 is lowered, it is possible to prevent the problem that the element row 9 is released from the element guide groove 42 and collapsed from the pressing section 46. Therefore, even when the push bar 14 is raised or even when the push bar 14 is lowered, the element guide groove 42 continues to guide the element row 9 of the fastener, so that the sewing position and the fastener are lowered. It is possible to maintain the spacing of the element rows 9 of.

In the embodiment shown in FIG. 2, an embodiment using a compression spring 52 is shown as a pressing means for pressing the element guide groove 42 to the to-be-sealed object, but instead of the compression spring 52, a tension spring and a leaf spring are shown. , Resins and other elastic materials can be used. In addition, as shown in FIG. 2, by providing the pressing means such as the compression spring 52 in the range between the needle hole 48 and the pivot shaft 50, the element row 9 is guided by the element guide groove 42. The mechanism to continuously fit in can be compactly constructed.

Next, the movement of the sewing machine foot 40 when sewing the dough 6 and the concealed slide fastener 8 is demonstrated using FIG. 3 and FIG.

3 is a cross-sectional view near the needle drop position when the sewing needle 12 and the sewing machine foot 40 are descending. 4 is sectional drawing of the needle drop position vicinity when the sewing needle 12 and the sewing machine foot 40 are raised. In addition, the embodiment shown in FIG. 3 and FIG. 4 is a composite conveyance which sends out the dough by combining the sewing machine foot 40, the outer press part 16, the sewing needle 12, and the lower conveying tooth part 58 in combination. It is the sewing method using the method. In addition, about the component demonstrated in FIG. 1 and FIG. 2, the same code | symbol is attached | subjected and description is abbreviate | omitted.

First, as shown in FIG. 1, when sewing the dough 6 and the concealed slide fastener 8 by a comprehensive conveying method using a sewing machine, the dough surface F of the retracted corner portion, which is the sewing portion of the dough 6, ), The concealed slide fastener 8 is set, the element array 9 of the concealed slide fastener 8 passes through the element guide groove 42, and the main shaft of the sewing machine is rotated to start sewing. Then, first, the pressing rod 14 descends to the sewing material side, and the lower conveying teeth 58 are raised, so that the sewing machine foot 40 and the lower conveying teeth 58 move from the upper and lower slide fasteners 8 and the dough ( 6) is inserted with a predetermined pressing force. Thereafter, as shown in FIG. 3, the sewing needle 12 is lowered to form a seam.

The embodiment shown in FIG. 3 is a figure which shows the sewing method of the comprehensive conveyance, The sewing machine foot 40 and the lower conveyance tooth part 58 penetrate the sewing needle 12 in the state which inserted the to-be-sealed object, and the sewing machine The foot 40, the lower feed tooth 58, and the sewing needle 12 are moved in the L direction, and the state in which the dough 6 is fed is shown. In addition, in the state shown in FIG. 3, the front stopper 59 (refer FIG. 4) of the rocking arm 47 contacts the foot mounting part 44, and restricts the movement which rocking arm 47 oscillates clockwise further. , Pressing portion 46 of the sewing machine foot 40 is pressed with a pressing force when penetrating the sewing object.

Next, the main needle of the sewing machine is rotated by the driving source (not shown) from the state shown in FIG. 3, so that the sewing needle 12 is raised to be spaced apart from the slide fastener 8 and the dough 6. Then, the pressing rod 14 is raised, and the sewing machine foot 40 releases the pressing force. In addition, the lower conveying tooth 58 is lowered at the same time as the pressing rod 14 is raised, and the lower conveying tooth 58 is spaced apart from the object to be sealed. Simultaneously with this release of the pressing force, the outer pressing part 16 is lowered to press the sewing object with the needle plate 26, and at this time, the sewing machine foot 40 and the lower conveying tooth part which are spaced apart from the sewing material. (58) and the sewing needle 12 are advanced in the M direction, the sewing machine foot 40 and the sewing object are relatively moved to transfer the seams. The state which forms the seam at this time is a state shown in FIG.

As shown in FIG. 4, in the state where the sewing needle 12 is spaced apart from the object to be sewing, that is, in the form of a seam, the swinging arm 47 is sealed at the front end side by the force of the compression spring 52. It is pressed against the offering. Since the swinging arm 47 is configured to be swingable about the pivot shaft 50 with respect to the foot mounting portion 44, the swinging arm 47 continuously maintains the state of the forward lowering. And the sliding surface 60 provided in the lower surface of the front part of the swinging arm 47 moves to M direction shown in FIG. 4, contacting the surface of a to-be-sealed object. In the opening of the element guide groove 42, an element inverting portion for arranging the element rows 9 which are bent and shaped into a U shape and inverted to an angle of 90 degrees or more is provided over the length H1. Similarly, even if the swinging arm 47 is in the forwardly lowered state, the element row 9 of the concealed fastener can be built up. Then, even when the push bar 14 is lowered and the rear end side of the swinging arm 47 is in contact with the element row 9, the element guide groove ( On the rear end side of 42, the element string 9 is fitted again. Therefore, even if it is formed in U shape, even if the element row 9 which is difficult to sew is prevented, the problem which bites into the press part 46 which moves relatively with the to-be-engaged material can be prevented.

In addition, in the state shown in FIG. 4, although the sliding surface 60 is in contact with the to-be-sealed object, the rocking amount of the rocking arm 47 is restrict | limited, Moreover, even if the foot mounting part 44 raises, the predetermined rocking amount As mentioned above, the rear stopper 57 which contacts the lower surface of the foot mounting part 44 is provided in the upper surface of the swinging arm 47 so that the swinging arm 47 may not rotate counterclockwise.

From the state shown in FIG. 4, the pressing rod 14 is lowered to the to-be-sealed side again, and the sewing machine foot 40 press-fits the to-be-sealed object by a pressing force, raises the outer press part 16, and raises it to the outer press part 16 The pressing force is released, and the state returns to the state shown in FIG. 3 again to form the penetrating portion. By repeating this series of operations, the to-be-sealed material is conveyed to L direction, and the seam line 28 is formed.

Next, the cross-sectional shape of the element guide groove 42 will be described with reference to FIG. 5. FIG. 5 is a view showing a V-V section near the needle drop position shown in FIG. 3.

As shown in FIG. 5, the element guide groove 42 opened to the to-be-sealed object has the parallel side surface A, A 'which guides the element row 9 between both sides, and guides. In addition, in the Example shown in FIG. 5, in order to sew the concealed slide fastener 8 to the thick dough 6, the element guide groove | channel 42 defines the space | interval B of the bending position of the element row 9, and sewing position. Doing. In this way, the element guide groove 42 guides the element rows 9 so as to stabilize the gap B between the sewing position and the element rows 9 and prevent the sewing from being disturbed.

In addition, when sewing the concealed slide fastener 8 to the dough 6, in order to prevent the element row 9 from being exposed to the outside after sewing, the gap between the bent position and the sewing position of the element row 9 is sewn. It is preferable that the one with less B is stable, and that this space | interval B is stable. Therefore, the element guide groove 42 shown in FIG. 5 guides in the state which inverted the element string 9 of the concealment fastener to the angle of 90 degrees or more, and makes the space | interval B small. In addition, the angle θ of the element guide groove 42 shown in FIG. 5 is preferably an angle of about 80 degrees.

Next, another embodiment of the cross-sectional shape of the element guide groove 42 will be described with reference to FIG. 6. FIG. 6 is a cross-sectional view near the needle drop position in the same portion as the cross section shown in FIG. 5, while FIG. 5 is a sewing machine foot 40 for sewing the concealed slide fastener 8 to the dough 6. The embodiment shown in FIG. 6 has shown sectional drawing of the sewing machine foot 140 for sewing the normal slide fastener 108 to the dough 6.

As shown in FIG. 6, the element guide groove 142 of the swinging arm 147 has parallel side surfaces C and C ′ which sandwich the element rows 109 of the ordinary slide fastener 108 from both sides. . In addition, in the Example shown in FIG. 6, in order to sew the slide fastener 108 to the thick dough 6, the element guide groove | channel 142 defines the space | interval D of the element row 109 and a sewing position. In this way, the element guide groove 142 is guided by sandwiching the element row 109 therebetween, so that the gap D between the sewing position and the element row 109 can be stabilized, thereby preventing the sewing from being disturbed.

The state which sewed the slide fastener 108 to the thick dough 6 using the rocking arm 147 shown in FIG. 6 is shown in FIG.

FIG. 7 shows that the slide fastener 108 is sewn to the thick dough 6 and the sewing portion 128 is sewn using the swing arm 147 shown in FIG. 6, and the sewing portion 128 is closed to the sewing portion 128. It is a figure which shows the state which retracted to the center and sewed the sewing part 129 together. In addition, the lower side of FIG. 7 is a surface used as the surface of the dough 6, and the upper side is a surface used as the back surface of the dough 6. As shown in FIG. By sewing the slide fastener 108 to the dough 6 using the swinging arm 147 having the element guide groove 142, even if the dough 6 is thick, the end face of the element row 109 The distance E of the refold line of the dough 6 can be matched.

Next, the operations of the sewing machine foot, the outer pressing part, the sewing needle, and the lower conveying tooth part in the respective conveying methods of the vertical conveying method and the comprehensive conveying method will be described.

8 is a diagram showing the timing of the overall conveying method of discharging dough by combining the sewing machine foot, the outer pressing part, the sewing needle, and the lower conveying tooth part. In addition, each direction of the rise, fall, return, and conveyance which are shown in the diagram is a direction shown in FIG.

As shown in FIG. 8, in the integrated conveying method, the pressing rod 14 is lowered to the sewing material side at the same time as shown in FIG. 4, and the lower conveying teeth 58 are raised to raise the sewing machine foot 40 and the lower part. The feed teeth 58 sandwich the slide fastener 8 and the dough 6 from the top and bottom with the pressing force. Thereafter, as shown in FIG. 3, the sewing needle 12 is lowered to form a penetrating portion of the seam, but at the same time, the sewing machine foot 40, the lower feed tooth 58, and the sewing needle 12 In synchronism with each other to move the paper toward the L direction shown in FIG.

Next, the sewing needle 12 is raised from the state shown in FIG. 3 to be spaced apart from the slide fastener 8 and the dough 6, and then the pressing rod 14 is raised to raise the sewing machine foot 40. Release the pressing force. At the same time as the pressing rod 14 is raised, the lower feed tooth 58 is also lowered to separate from the object to be sealed. At the same time as the release of the pressing force, the outer pressing portion 16 is lowered to press the object to be sealed between the needle plate 26. In the state, the sewing machine foot 40, which is spaced apart from the sewing object, the lower feed teeth 58, and the sewing needle 12 are returned (advanced in the M direction), so that the sewing machine foot 40 The to-be-sealed object is moved relatively to form a conveying portion of the seam. The state which forms the conveyance part of this seam is a state shown in FIG. 4, and the sliding surface 60 of the sewing machine foot 40 slides on the surface of the slide fastener 8. As shown in FIG. By repeating this series of operations, the to-be-sealed object is conveyed and the seam line 28 is formed.

Next, the operation of the sewing machine foot, the outer pressing part, the sewing needle, and the lower feed tooth part in the vertical conveying method will be described.

Fig. 9 is a diagram showing the timing of the up-and-down conveying method in which the outer presser and the lower feeder tooth are displaced by moving the outer presser and the lower feeder tooth among the sewing machine foot, the outer presser, the sewing needle, and the lower feeder tooth. In addition, each direction of the rise, fall, return, and conveyance which are shown in the diagram is a direction shown in FIG.

As shown in FIG. 9, in the up-and-down conveying method, first, as shown in FIG. 4, the lower conveying tooth part 58 is raised in the state which the outer pressing part 16 fell, and the slide fastener 8 moves up and down. And dough (6). Next, the sewing machine foot 40 is raised, and in that state, the outer pressing portion 16 and the lower conveying tooth portion 58 are conveyed in the L direction (rear) to form a conveying portion of the seam. In this state, as shown in FIG. 4, the sliding surface 60 of the sewing machine foot 40 slides on the surface of the slide fastener 8.

When the transfer operation of the to-be-sealed object is finished, the sewing machine foot 40 is lowered and the slide fastener 8 and the dough 6 are sandwiched between the needle plate 26 with a pressing force. Subsequently, an operation of raising the outer pressing portion 16 and lowering the lower feed tooth 58, advancing and returning in preparation for the next feeding operation is started.

Next, the sewing needle 12 is lowered to form a through portion of the seam. When the formation of the penetrating portion is completed, the sewing needle 12 is raised to lower the outer pressing portion 16, and at the same time, the lower feed tooth 58 is raised to lift the slide fastener 8 and the dough 6 from up and down. And the sewing machine foot 40 is raised to start the next transfer operation. By repeating this series of operations, the to-be-sealed material is conveyed in L direction one by one, and the seam 28 is formed.

Based on the timing chart of the overall conveyance method shown in FIG. 8, the timing schematically showing the up and down motions of the sewing machine foot, the outer pressing part, the sewing needle and the lower feed tooth, and the front and rear motions, with the horizontal axis as the main axis angle of the sewing machine. The chart is shown in FIG. Moreover, based on the timing chart of the up-and-down conveying method shown in FIG. 9, the up-and-down operation | movement and the front-back operation of a sewing machine foot, an outer press part, a sewing needle, and a lower feed tooth part are made with the horizontal axis of a sewing machine as a main axis angle. The timing chart shown is shown in FIG. 10 and 11 are the same as those shown in FIGS. 8 and 9, and thus descriptions thereof will be omitted.

Next, another embodiment regarding the shape of the sewing machine foot will be described.

12 is a sewing machine according to a second embodiment of the present invention, having a forward inclined portion 263 that inclines the front end of the sewing machine foot 240 and a receding inclined portion 264 that inclines the rear end upward. It is an exploded perspective view which shows the foot 240, and FIG. 13 is a perspective view (XIII arrow figure) seen from the lower surface of the sewing machine foot 240 shown in FIG. In addition, about the site | part which has a function similar to the site | part shown in FIG. 2, the same code | symbol is attached | subjected and description is abbreviate | omitted.

As shown in FIG. 12, the swinging arm 247 of the sewing machine foot 240 has a lowering portion of the swinging arm 247 that presses the object to be sealed with a pressing force when the sewing needle 12 penetrates. 246 and an inclined surface 262 inclined upwardly and forwardly with respect to the pressing surface of the pressing portion 246, the forward inclined portion for performing an operation of climbing on the to-be-sealed object when carrying out the forward sewing on the to-be-sealed object. 263 and a retreat inclination portion 264 which performs an operation of getting on the to-be-processed object when conveying the to-be-processed object in the retreating direction. Further, the forward inclined portion 263 is convexly formed at the distal end of the swinging arm 247 and protrudes and is disposed on the inclined sliding surface 260 and the side of the sliding surface 260 to guide through the element row 9. An inclined element guide groove 242 is provided. In addition, in the Example shown in FIG. 12, the inclined surface 262 which performs the operation | movement which climbs on a to-be-sealed object is formed much lower than the protruding sliding surface 260. FIG. In addition, in this embodiment, although the pressing surface of the pressing part 246 and the inclined surface 262 are shown with the flat surface, this invention is not limited to the combination of the flat surface, At least one of 246, the inclined surface 262, the sliding surface 360, and the receding inclined portion 264 may be configured as a curved surface. The curved portion 246, the inclined surface 262, the sliding surface 360, and the receding inclined portion 264 may be configured to be connected to one curved surface, and may also be suitable for the direction of the curved line and the degree of the curved line. You can decide.

In addition, as shown in FIG. 13, the element row 9 is fitted to a portion of the pressing portion 246 that is not interfered with the needle hole 48 on the sewing attachment portion rear side. In order to avoid registration, the element covering part 270 of the shape expanded in the width direction is provided. In addition, in the Example shown to FIG. 12 and FIG. 13, the width WS of the sliding surface 260 which protrudes and protrudes in convex shape to the front-end | tip of the swinging arm 247 is narrower than the width WP of the press part 246. Setting.

Next, with reference to FIG. 14, the action of the forward inclination part 263 and the backward inclination part 264 is demonstrated.

Fig. 14 shows a state in which the foot mounting portion 44 of the sewing needle 12 and the sewing machine foot 240 is raised, and the sliding surface 260 provided on the forward inclined portion 263 of the swinging arm 247 is a slide fastener. It is sectional drawing of the needle drop position vicinity in the state which slides on the surface of (8), and forms the conveyance part of the seam. In addition, about the component demonstrated in FIG. 4 and FIG. 12, the same code | symbol is attached | subjected and description is abbreviate | omitted.

As shown in FIG. 14, in the state which forms the conveyance part of the seam, the compression spring 52 presses the rocking arm 247 which forms the element guide groove 242 to a to-be-sealed object. Since the swinging arm 247 is comprised so that the foot mounting part 44 can be rocked about the pivot shaft 50, the rocking arm 247 has maintained the state of forward lowering, The rocking arm 247 The sliding surface 260 provided in the front part of the body moves in the M direction shown in FIG. 14, making contact with the surface of the to-be-sealed object.

In addition, in the Example shown in FIG. 14, when carrying out forward sewing with respect to a to-be-sealed object, the forward inclination part 263 which performs the operation | movement which climbs with respect to a to-be-processed object protrudes in front of the swinging arm 247. As shown in FIG. The side surface of the sliding surface 260 of the tip end of the swinging arm 247 is provided with an opening of the element guide groove 242 that guides through the element row 9, and is upward above the pressing surface of the pressing section 246. Further, the forward inclined portion 263 having the inclined surface 262 inclined in the forward direction protrudes the swinging arm 247 forward, so that the length H2 including the element guide groove 242 and its introduction portion can be set long. Therefore, the element string 9 inverted into the U-shape of the concealed slide fastener 8 can be guided over a long distance, thereby making it possible to more erect the operation. The element string 9 is bitten by the pressing portion 246. This can prevent problems from entering. In addition, after sewing the slide fastener 8, it is possible to sew another dough as it is.

In addition, by providing the reverse inclined portion 264 which performs the operation of getting on the to-be-sealed object, even when sewing is attached in the retracting operation, the dough 6 can be easily fed into the pressing portion 246. Even in the case of sewing dough having different thicknesses, the retreat can be sewed so as not to be caught.

Next, the effect | action of the width WS of the sliding surface 260 formed narrower than the width WP of the press part 246 is demonstrated using FIG.

FIG. 15 is a view of the sewing machine foot 240 viewed from the front of the seam, in which the slide fastener 8, the dough 6, and the needle plate 26 are in contact with the slide fastener 8 and the sliding surface 260. Is a cross-sectional view (XV-XV cross-sectional view shown in Fig. 14).

As illustrated in FIG. 15, the convex width WS of the sliding surface 260 is set to be narrower than the width WP of the pressing portion 246 or narrower than the passage hole WN in the needle plate 26. When the slide fastener 8 and the dough 6 are closed, or the slide fastener 8 and the dough 6 are all sealed together, the slide fastener 8 and the dough 6 are rocking arms. Even if the situation does not exist between the 247 and the needle plate 26, the sliding surface 260 and the upper surfaces of the needle plate 26 are rubbed with each other by relative movement, and thus the surfaces of the sliding surface 260 and the needle plate 26 are oriented. This damage can be prevented. Therefore, the sliding surface 260, the needle plate 26, and the to-be-slip of the to-be-sealed object can be kept favorable over a long term, and sewing disorder can be prevented.

Next, the pressing portion 246 is formed in a part of the swinging arm 347, and the element escaping portion 270 is formed in the element guide groove 242 behind the sewing attachment portion than the needle hole 48 of the pressing portion 246. The operation in the case of installing) will be described with reference to FIG. 16.

FIG. 16: is sectional drawing which cut | disconnected the rocking arm 247 of the sewing machine foot 240 by XVI-XVI shown in FIG.

As shown in FIG. 16, by providing the element escape part 270 which avoids fitting with the element row 9 rather than the needle hole 48 which lets the sewing needle 12 pass, The element row 9 after sewing is bent in the left and right directions. Therefore, even when sewing the slide fastener 8 to the thick dough 6 and sewing the curved portion, the curved portion is prevented while the element row 9 falls off from the element guide groove 242. Can be easily performed. In addition, an element guide groove 242 substantially equal to the width of the element row 9 is formed between the element escape portion 270 and the needle hole 48, and the needle hole 48 and the element escape portion 270 are formed. Is configured not to interfere directly. With such a configuration, stable sewing can be performed without deviation of needle drop, and the curved portion can be sewn by bending the element string 9 after sewing to the left and right directions.

Next, another embodiment of the swinging arm of the sewing machine foot will be described with reference to FIG. FIG. 17 is an exploded perspective view showing the third embodiment of the present invention, which is provided with a rotatable swinging head 380 at the distal end of the swinging arm 347 constituting the sewing machine foot 340.

As shown in FIG. 17, the sewing machine foot 340 presses the to-be-sealed object by the predetermined pressing force at the time of penetrating the sewing needle 12 and the foot mounting part 44 fixed to the pressing rod 14 of a sewing machine. The pressing portion 346, the element guide grooves 342 and 386 guiding through the element row 9, and the swinging arm 347 can swing with respect to the foot mounting portion 44 in a vertical plane parallel to the seam. The pivot shaft 50 which pivotally supports and the pivot shaft 382 which pivotally supports the oscillation head 380 with respect to the oscillation arm 347 in a perpendicular plane parallel to a seam line are provided. At the front end of the swinging arm 347 and the rear end of the swinging head 380, a bearing 383 for supporting the pivot shaft 382 and a bearing 384 are drilled. In addition, similarly to the embodiment shown in FIG. 2, the pressing means for pressing the element guide groove 342 against the object to be sewing, behind the needle hole 48 of the swinging arm 347 and in front of the pivot shaft 50. It is provided with a compression spring (not shown) which functions as a function.

By constructing the sewing machine foot 340 in this way, the swinging arm 347 can swing around the pivot shaft 50 with respect to the foot mounting portion 44, and the swinging head 380 is moved to the swinging arm 347. It can rotate about the pivot axis 382 so that it can oscillate.

Next, the operation of the sewing machine foot 340 having the swinging head 380 which is further rotatable at the distal end of the swinging arm 347 will be described with reference to FIG. 18.

18 is a view of the sewing machine foot 340 viewed from the side of the seam, and is a side view of the slide fastener 8, the dough 6, the needle plate 26, and the lower feed tooth 58.

As shown in FIG. 18, element guide grooves 386 and 342 are formed in the sliding surface 360 of the swinging head 380 and a part of the swinging arm 347 to guide the elements through the row of elements 9. have.

In the state in which the foot mounting part 44 raises and forms the conveyance part of the seam, the swinging arm 347 is pressed in the direction of the to-be-sealed object by the compression spring which is not shown in figure. Since the swinging arm 347 is comprised so that the foot mounting part 44 can pivot about the pivot shaft 50, the swinging arm 347 is the M direction shown in FIG. 18, maintaining the state of forward lowering. Go to.

Since the rocking head 380 which is rotatably centered around the pivot axis 382 is provided in the front-end | tip part of this rocking arm 347, the sliding surface 360 of the rocking head 380 contacts the surface of the to-be-sealed object. It moves to the M direction shown in FIG. In the opening of the element guide groove 386 formed on the sliding surface 360 of the swinging head 380, an element inverting portion which erects the element string 9 bent and formed into a U shape and inverts it to an angle of 90 degrees or more, Since it is provided over the length H3, even if the swinging arm 347 is in the state of forward lowering as shown in FIG. 18, the element row 9 of the concealed fastener can be effectively erected. Therefore, it becomes possible to effectively erect the element row 9 formed in the U shape, and prevent the problem of being bitten into the pressing portion 346 which moves relatively with the object to be sealed. And then, even when the push rod 14 is lowered, the problem that element heat escapes from the element guide groove 342 and collapses from a press part can be prevented. Therefore, even when sewing the concealed slide fastener 8 to the thick dough 6, the problem that sewing is disturbed can be prevented.

Next, another embodiment of the swinging arm of the sewing machine foot will be described with reference to FIG. 19. 19 is a perspective view showing a fourth embodiment of the present invention, in which a rotatable roller head 480 is provided at the distal end of the swinging arm 447 constituting the sewing machine foot 440.

As shown in FIG. 19, the sewing machine foot 440 presses the foot mounting portion 44 fixed to the pressing rod 14 of the sewing machine, and presses the sewing object with a predetermined pressing force when the sewing needle 12 penetrates. The portion 446, the element guide groove 486 for introducing and guiding the element train of the slide fastener, and the swing arm 447 pivotally pivotally with respect to the foot mounting portion 44 in a vertical plane parallel to the seam. The pivot shaft 50 which supports is supported, and the pivot shaft 482 which pivotally supports the roller head 480 rotatably with respect to the rocking arm 447 in the plane parallel to a seam line. In addition, as in the embodiment shown in FIG. 2, the pressing means for pressing the element guide groove 486 against the to-be-sealed object, behind the needle hole 48 of the swinging arm 447, and in front of the pivot shaft 50. It is provided with a compression spring (not shown) which functions as a function.

By constructing the sewing machine foot 440 in this manner, the rocking arm 447 can be made to swing around the pivot shaft 50 with respect to the foot mounting portion 44, and the roller head 480 is swingable ( 447).

Next, the effect | action of the Example provided with the rotatable roller head 480 in the front-end | tip part of the rocking arm 447 is demonstrated.

The circumferential surface of the roller head 480 shown in FIG. 19 always comes into contact with the fastener tape surface of the slide fastener 8 before sewing, so that the roller head 480 forms on the slide fastener 8 when the seam transfer portion is formed. Moves clouds. An element guide groove 486 is formed on the circumferential surface of the roller head 480, and the element guide groove 486 is formed by inverting and inverting the element string 9, which is bent and formed into a U shape, so that the swinging arm ( Even when the 447 is in the forward lowering state or when the object to be pressurized is pressed with a pressing force, the element rows 9 of the concealed fastener can be raised.

In addition, this invention is not limited to the said Example, Of course, can change variously in a claim. For example, the element to-be-covered part 270 may be formed in the element guide groove 42 of 1st Example, and the inclined surface 262 may be formed in the same level evenly.

By using the sewing machine foot which concerns on this invention, a concealed slide fastener can be sewed also about thick dough, such as fabric paper and leather.

Claims (11)

A foot mounting portion 44 fixed to the pressing rod 14 of the sewing machine, a press portion 46 for pressing the sewing object during the penetration of the sewing needle 12 by vertically moving together with the foot mounting portion 44; In the sewing machine foot (40) having an element guide groove (42) for guiding up and down movement in conjunction with the foot mounting portion (44) and inserting and guiding the element string (9) of the slide fastener (8), A rocking arm having the element guide groove 42 and pivotally supported by the foot mounting portion 44 so as to be relatively oscillable with the foot mounting portion 44, and swinging in a vertical plane parallel to the seam 28 during sewing. (47), It is provided between the said foot mounting part 44 and the said swinging arm 47, and is provided with the pushing means 52 which presses the said swinging arm 47 toward the to-be-sealed goods with respect to the said foot mounting part 44, When the pressing means 52 presses the rocking arm 47 toward the object to be sewing, even when the sewing machine foot 40 is in any of an upper position and a lower position, the element guide groove 42 Sewing machine foot, characterized in that at least part is configured to guide a part of the element row (9). delete The sewing machine foot according to claim 1, wherein the element guide groove (42) has a parallel side surface that opens toward the object to be sealed. 4. The element inverting portion according to claim 3, wherein the opening of the element guide groove 42 is provided with an element inverting portion for raising an element installation corner portion of the concealed fastener bent into a U shape and inverting it to an angle of 90 degrees or more. Sewing machine foot. The sewing machine foot according to any one of claims 1, 3 and 4, wherein the pressing portion (46) is formed on a part of the swinging arm (47). A needle hole (48) for passing the sewing needle (12) through the pressing portion,  A sewing machine foot comprising an element guiding portion (270) for avoiding fitting with an element row (9) in an element guide groove (242) behind the needle attachment portion (48) rather than the needle hole (48). The inclined surface 262 in any one of Claims 1, 3, or 4 which has the inclined surface 262 which inclines upward with respect to the lower surface of the said rocking arm 47, and is at the tip part of the rocking arm 47, A sewing machine foot, characterized by comprising a forward inclined portion 263 that performs an operation of getting on the sewing object. The sliding surface according to claim 7, wherein the foot mounting portion (44) is raised, and the sliding surface that comes into contact with the surface of the to-be-sealed object when the rocking arm 47 is rotated in the direction of the to-be-sealed object by the action of the pressing means (52). 60 is provided in the front part of the swinging arm 47, The width of the sliding surface 260 is set smaller than the width of the pressing portion 246, characterized in that the sewing machine foot. The back end of the said press part 246 is provided with the retreat inclination part 264 which performs the operation | movement which climbs with respect to a to-be-processed object in any one of Claims 1, 3, or 4. To do, sewing machine foot. The sewing machine foot according to any one of claims 1, 3 and 4, wherein the pressing means (52) is provided with a compression spring (52) or a leaf spring. A foot mounting portion 44 fixed to the pressing rod 14 of the sewing machine, A pressing part 46 which vertically moves together with the foot mounting part 44 to press the sewing object during the penetration of the sewing needle 12; An element guide groove 42 for guiding the element array 9 of the slide fastener 8 while moving upward and downward in association with the foot mounting unit 44; A swing made with the element guide groove 42 pivotally supported by the foot mount 44 so as to be relatively rockable with the foot mount 44, and swing within a vertical plane parallel to the seam 28 during sewing. With an arm (47), It is disposed between the foot mounting portion 44 and the swinging arm 47, and has a pressing means 52 for pressing the swinging arm 47 against the to-be-sealed object with respect to the foot mounting portion 44, When the pressing means 52 presses the rocking arm 47 toward the object to be sewing, even when the sewing machine foot 40 is in any of an upper position and a lower position, the element guide groove 42 A sewing machine for sewing, characterized in that at least a portion is provided with a sewing machine foot (40) configured to guide a portion of the element row (9).

Images