JPH0346156B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an automatic sewing device for sewing individual items, more specifically, an automatic sewing device for sewing individual seat pads and seat covers used for upholstering automobile seats. This invention relates to a sewing device.

(Prior art) For example, seat pads and seat covers used for upholstering automobile seats are produced by polymerizing and pulling out a roll-wound pad material and a roll-wound cover material, and then sewing them continuously. By using the sewing machine, it is possible to sew with high productivity.

However, the seat pad and seat cover are
Since there are few straight parts, the outer shape is relatively varied, and the sizes are different, the method of polymerizing and pulling out the original fabric and sewing it continuously as described above is not possible. In terms of material removal, there is a significant amount of cutting loss, which greatly reduces economic efficiency. For this reason, this type of sewing is performed by so-called piece sewing, in which each item is sewn individually.

(Problems to be Solved by the Invention) Piece sewing of seat pads and seat covers reduces material cutting loss and greatly improves economic efficiency in terms of material removal. The seat pads and seat covers that have been cut into pieces are sewn together one by one using manual labor, resulting in poor productivity.
This causes a decline in economic efficiency, and furthermore,
Since the worker grasps the workpiece with his/her hands and applies tension to the workpiece while sewing, the tension may vary due to individual differences and accumulated fatigue of the worker, making it difficult to sew properly. It is difficult to maintain constant tension at all times. As a result, variations in quality increase and yield decreases.

Therefore, it has not been possible to obtain a highly reliable sewn product that is economical and of high quality.

The present invention has been made in view of the above circumstances, and provides a highly reliable sewn product that ensures both excellent economic efficiency due to improved productivity and high quality due to improved yield. The purpose of the present invention is to provide a single automatic sewing device that can perform the following functions.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides a sewing means disposed on the terminal end side of the machine body for sewing and carrying out the sewing material, and a sewing means disposed on the terminal end side of the machine body for sewing and carrying out the sewing material, and a sewing means disposed on the starting end side of the machine body. A sewing material supply means for intermittently raising the arranged and stacked materials one by one to a supply position, and a sewing material supplying means for sequentially holding the sewing materials that have reached the supply position and transferring them to the upper surface of the machine body. a sewing object transport means; a sewing object feeding means for sending the sewing object transferred to the upper surface of the machine body to the entrance of the sewing means; The sewing machine is equipped with a means for pressing the object to be sewn loosely against the upper surface, and a tension reaction force applying means for applying a tensile reaction force to the object to be sewn during sewing.

(Function) According to the present invention, the article to be sewn which has ascended and reached the supply position by the article to be sewn supply means is sequentially transferred to the upper surface of the machine body by the article to be sewn transfer means, and the transferred article to be sewn is The starting end of the sewing material is sent to the entrance of the sewing means by the material feeding means, and from this point until at least immediately before the end of sewing, the material to be sewn is pressed loosely against the upper surface of the machine body by the material pressing means. This method suppresses gradual shrinkage at the initial stage of sewing, prevents meandering of the sewn material, and forms a sewing groove in the feeding direction.

Further, the sewing material whose sewing start end is sent into the entrance is sewn and carried out by the sewing means, and the sewing material is properly sewn by means for applying a tensile reaction force to the material during sewing. Apply tension.

(Example) Hereinafter, an example of the present invention will be described based on FIGS. 1 to 3.

In these figures, reference numeral 1 denotes a sewing object supplying means for the machine body 10, 20 an attachment object feeding means 30, an attachment object pressing means 40, and a tensile reaction force applying means.

The fuselage 1 is formed with a pair of first guide notches 1a, 1a extending in the longitudinal direction at both ends of the upper surface 1A in the width direction, and a pair of first guide notches 1a, 1a extending in the longitudinal direction. Two guide notches 1b, 1b are formed.

The material to be sewn supply means 10 is for sequentially supplying the material to be sewn, which will be described later, to a supply position A corresponding to a horizontal extension line of the upper end of the starting end side (front end side) X ₁ of the machine body 1. It is arranged on the starting end side X ₁ of 1. For example, as shown in FIG.
0, that is, a thick seat pad 60a made of highly elastic urethane foam and a thin seat cover 60b made of a skin material such as textile or synthetic resin sheet are polymerized as one set, as shown in FIG. In order to stack and support a plurality of sets, a support plate 11 is provided which extends forward and horizontally from the starting end side _X1 of the fuselage 1. As shown in FIG. 5, this support plate 11 is provided so as to be movable up and down guided by vertical shafts 13, 13 via connecting members 12, 12 attached to both sides of the front end in the width direction.
A motor 14A, a pair of upper and lower rotating shafts 14B, 14B extending in the horizontal width direction, and these rotating shafts 14B, 14.
Driven chain 14C and motor 14 spanned over B
It is raised and lowered by an elevating mechanism 14 consisting of A and a drive chain 14D extending over a lower rotating shaft 14B. Further, when the state in which the uppermost workpiece 60A among the workpieces 60 stacked and supported on the support plate 11 in FIGS. 1 and 5 reaches the supply position A is detected, a rise stop signal for the support plate 11 is sent is output, the motor 14A of the drive mechanism 14 is stopped, and the uppermost workpiece 6 is output from the supply position A.
It detects the state in which 0A has been transferred, outputs a signal for raising the support plate 11, and activates the motor 14A of the drive mechanism 14.
A first detector (for example, a photo sensor) 15 that rotates the
A second detector (for example, a limit switch) 16 that detects the upper limit position of the support plate 11 that rises after removal of A to 60N, outputs a signal for lowering the support plate 11, and reversely rotates the motor 14A of the drive mechanism 14; ,
A third detector (for example, a limit switch) 17 is provided which detects the lower limit position of the support plate 11 that is lowered by this operation, outputs a stop signal for the support plate 11, and stops the motor 14A.

The sewing object transfer means 20 sequentially holds the sewing objects 60A to 60N that have reached the supply position A, and
This is for transporting the sewing object to a predetermined position on the upper surface 1A of the machine body 1, and includes a sewing object holding mechanism 21, a lifting mechanism 22 that raises and lowers this holding mechanism 21, and a support mechanism 23 that integrally connects and supports both 21 and 22. Equipped with:

The support mechanism 23 is connected to the first guide notches 1a, 1 of the fuselage 1.
A pair of left and right L-shaped arm members 23A, 23A facing each other with a width interval corresponding to a, and a front and rear arm that is fixed to a bridge between the upper ends of the upright parts of these arm members 23A, 23A and extends in the horizontal width direction. A pair of spindles 2
3B, 23B, and the holding mechanism 21 has the front and rear 1
On the lower side of the pair of support shafts 23B, 23B, the support shaft 2
3B, 23B, and a pair of left and right holding frames 21B, 21B attached to the lower surface of the bracket 21A and perpendicular to the bracket 21A and extending back and forth. It has a base 22A fixed across the shafts 23B, 23B, and an elevating source 22B consisting of an air cylinder erected with a vertical axis on the upper surface of the base 22A, and the piston rod 22b of the elevating source 22B is A pair of guide poles 22C, 22C are connected to the upper surface of the bracket 21A of the sewing object holding mechanism 21 through the base 22A, and are erected on the upper surface of the bracket 21A on both the left and right sides of the piston rod 22b. It extends upward through the lower side so that it can be raised and lowered.

Holding frames 21B, 21B of the sewing object holding mechanism 21
As shown in FIG. 6, the cases 210, 210 are mounted on the bottom surface of the case 210, 210 in the front and back. Arc-shaped holding needles 211, 211, which are attached in a divided manner and protrude and retract from these cases 210, 210, are provided with needle tips facing opposite sides. The rear holding needle 211, that is, the downstream holding needle 211 in the feeding direction (see _arrow The protruding and retracting mechanism 213 is connected to a piston rod 215a of a drive source 215 formed by an air cylinder via a second arm member 214, and is connected to a piston rod 215a of a drive source 215 formed by an air cylinder. The needle 211 is connected via a third arm member 216 to a rotating shaft 217 held in the front case 210. and,
A fourth arm member 218 fixed to the shaft end of the rotation shaft 217 and a fifth arm member 219 connected to the protruding and retracting mechanism 213 on the near side of the second arm member 214 are connected to each other by a connecting link 219A. has been done.

Note that the arc-shaped holding needles 211, 211 are normally recessed into the cases 210, 210 as shown in FIG. 60A), the actuation of the drive source 215 causes it to protrude from the cases 210, 210 and be inserted into the ejected object 60A, as shown in FIG. Then, an object to be sewn (for example, 6
A fourth detector (for example, a limit switch 219B) is provided for detecting a state in which the actuator 0A) is in contact and outputting an operation signal to the drive source 215.

Further, the horizontal ends of the L-shaped arm members 23A, 23A in the support mechanism 23 in FIG. , 1st
A pair of front and rear rotation shafts 23F, 23F, which are connected so as to be movable back and forth using horizontal shafts 23D, 23D provided in parallel on the lower inner side of the guide notches 1a, 1a as guides, and extend in the horizontal width direction of the motor 23E; 2
Driven chain 23G spanning 3F and 23F,
23G, is moved back and forth by a back-and-forth movement mechanism 23I consisting of a motor 23E and a drive chain 23H that spans the front rotating shaft 23F, and the amount of movement is
In other words, the stroke amount is determined by the fifth detector 23J and the sixth detector 23, which are, for example, limit switches.
It is set by K.

The sewing object feeding means 30 is the sewing object transporting means 2.
Sewing start end 60 of the object to be sewn 60 transferred from the object to be sewn supply means 10 to the upper surface 1A of the machine body 1 by
X ₁ (see Figure 4), X ₃ on the terminal side of fuselage 1 in Figure 1
As shown in FIG. 5, a pair of left and right clamp mechanisms 31, 31,
31 and a support mechanism 33 that integrally connects and supports both 31 and 32.
It is equipped with

The clamping mechanisms 31, 31 are opposite to each other on the left and right with a width interval corresponding to the second guide notches 1b, 1b of the body 1, and have clamp claws 31A, 31A facing vertically as shown in FIG. Opening/closing cylinder 3 that opens and closes these clamp claws 31A, 31A
1B. And the clamp claw 31A,
31A and spacing cylinder 31B are attached to a mounting plate 31C. The lifting mechanism 32 is composed of an air cylinder 32A having a vertical axis, and the upper end of the piston rod 32a is connected to the support mechanism 33.
The upper support plate 33A is connected to the lower surface of the upper support plate 33A. The air cylinder 32A is attached to the lower support plate 33
Therefore, the piston rod 32a passes through the lower support plate 33B so as to be able to move up and down, and is connected to the lower surface of the upper support plate 33A.

Upper support plate 33A that constitutes the support mechanism 33
and the lower support plate 33B are provided extending in the horizontal width direction, as shown in FIG.
A horizontal axis 33C provided parallel to both sides of the lower part of the
A motor 33A, a pair of front and rear rotating shafts 33 extending horizontally,
D, 33D, driven chains 33E, 33E spanned over these rotating shafts 33D, 33D, motor 33
It has a front-rear movement mechanism 33I consisting of a drive chain 33F that spans between the front rotating shaft 33D and the drive shaft 33G, and a transmission chain 33H that spans the front rotation shaft 33D and the drive shaft 33G. A seventh detector 33J consisting of an upward photo sensor is installed inside, and the lower support plate 33B is connected to driven chains 33E, 33E. Further, eighth and ninth detectors 33K and 33L each consisting of a limit switch are provided corresponding to the lower surface of the lower support plate 33B.

The sewing object pressing means 40 pushes the sewing object 60 onto the upper surface 1 of the machine body 1 until the sewing object 60 is fed into the sewing means 70 by the sewing object feeding means 30.
A is pressed loosely to suppress gradual shrinkage at the initial stage of sewing, prevent meandering of the material to be sewn 60, and form a sewing groove in the feeding direction.
One is provided on each side of the vertical axis _C1 with a predetermined width interval in the vicinity of the end point _X3 of the fuselage 1. It has an elevating source 41 made of an air cylinder, and a pressing plate 42 that is raised and lowered by the elevating source 41, and the pressing plate 42 extends parallel to the vertical axis _C1 to the entrance 70a of the sewing means 70. It's out. Also,
A support base 43 supporting the elevating source 41 is fixed to a pair of front and rear support shafts 44, 44 extending in the horizontal axis direction.

The tensile reaction force applying means 50 applies tension to the workpiece 60 to be sewn by the sewing means 70 to perform suitable sewing. A braking member 5 is attached to the upper surface of both ends in the width direction of the side support plate 33 and into which the horizontal shafts 33C, 33C are inserted with a predetermined frictional force.
1, 51, and the drive shaft 33G of the longitudinal movement mechanism 33I.
An electromagnetic clutch 5 is incorporated in the drive shaft 33G and can intermittent rotation of the drive shaft 33G with respect to the front rotation shaft 33D.
It is composed of 2. Since the sewing means 70 is constituted by a well-known sewing machine, a description thereof will be omitted.

Note that the holding frames 21B, 21B of the sewing object holding mechanism 21 in the sewing object transfer means 30 are fixed to the bracket 21A depending on the width dimension of the sewing object 60, etc.
In addition, the number of the sewing object pressing means 40 can be increased or decreased depending on the width dimension of the sewing object 60 and the number of grooves to be formed, which will be described later. , the mutual spacing can be adjusted as appropriate by moving them along the support shafts 44, 44.

Next, the operation of the above structure will be explained using the flowchart shown in FIG. In addition, P ₁ to _{P 38} in the figure
indicates each control step.

First, start with P ₁ , then turn on the power switch with P ₂ .
do. As a result of turning on the power switch at _P2 , it is determined whether _P3 automatic sewing is enabled or not, and if automatic sewing is set, the process advances to _P4 . At _P4 , it is determined whether or not each of the means 10, 20, 30, 40, 50, and 70 constituting the present invention is at the origin, and if all are at the origin, the process advances to _P5 , and the sewing material supply means A plurality of objects to be sewn 60 (60A to 60N) are mounted on ten support plates 11.
(See Figure 10).

On the other hand, each of the means 10, 20, 30, 40, 5
If at least one of 0,70 is not at the origin
Proceeding from _P4 to _P6 , the buzzer sounds, and based on the buzzer, turn on the reset switch at _P7 to position each means 10, 20, 30, 40, 50, and 70 all at the origin.

Item to be sewn 60 (60A to 60N) at P ₅
When stacking is completed, proceed to P. ₈ , turn on the start switch, and proceed to P. ₉ . At _P9 , the motor 14A in the drive mechanism 14 of the article supplying means 10 rotates forward to raise the support plate 11, and the process proceeds to _P10 , where the first detector 15 detects that the uppermost article 60A is being sewn. It is determined whether or not the supply position A has been reached, and if the supply position A has been reached, the process proceeds to _P11 and the lifting of the support plate 11 is stopped.

Naturally, while the uppermost workpiece 60A does not reach the supply position A, the support plate 11 continues to rise from _P10 to _P9 .

When the support plate 11 stops at P ₁₁ , the process proceeds to P ₁₇ , where the lifting mechanism 22 in the sewing material transfer means 20
The elevating source 22B operates, and the piston rod 2
2b is lowered to lower the sewing object holding mechanism 21, and the fourth detector 219B detects the uppermost sewing object 60.
When it comes into contact with the top surface of A, the process proceeds to P ₁₈ , and the drive source 215 shown in FIG. 6 is activated to move the piston rod 215a.
moves forward, and as shown in FIG. 7, the holding needles 211,
211 is inserted into the object to be sewn 60A, and the process proceeds to _P19 .

At _P19 , the lifting source 22B operates to raise the piston rod 22b, lift up the sewing material 60A as shown in FIG. 11, and proceed to _P20 , where the motor 23E of the support mechanism 23 is rotated in the forward direction. The material transfer means 20 is moved forward in the feeding direction _X2 , and the tips of the horizontal parts of the L-shaped arm members 23A
When the machine comes into contact with the detector 23K, the process advances to _P21 , and as shown _in FIG. ₂ , it is determined whether or not the vehicle has started moving forward, and if it has started moving forward, it proceeds to P ₂₃ , and if it has not started moving forward, it proceeds to P ₂₁ and waits for a stop.

At P ₂₃ , the piston rod 22b of the elevating source 22B descends to move the workpiece 60A to the machine body 1.
The holding needles 211 and 211 are placed on the upper surface 1A and proceed to P ₂₄ , and by the reverse operation of the operation described in P ₁₈ , the holding needles 211 and 211 are
from the object to be sewn 60A, proceed to P. ₂₅ , and proceed to P. _17.
The sewing object holding mechanism 21 is raised by the reverse operation of the operation described above (see FIG. 13).

When the holding mechanism 21 rises in P ₂₅ , the process proceeds to P ₂₆ , in which the sewing material transfer means 20 is retreated in the opposite direction to the movement described in P ₂₀ , and the L-shaped arm members 23A, 23A are moved back. When the connecting members 23C, 23C connected to the tips of the horizontal portions contact the fifth detector 23J, the process proceeds to _P27 , returns to the origin, stops, and proceeds to _P10 .

On the other hand, when the holding mechanism 21 rises at P ₂₅ ,
Proceeding to P ₂₈ , the robot has already started moving forward in the above-mentioned P ₂₁ , and during this forward movement, the piston rod 32a of the air cylinder 32A in the elevating mechanism 32 in FIG. The seventh detector 33J of the object feeding means 30, which has been opened and opened and the opening/closing cylinder 31B is operated to open the clamp claws 31A and 31A as shown in FIG. 14, detects the sewing end _60X2 ( (see Fig. 4), the sewing material feeding means 30 is stopped, and the opening/closing cylinder 31B is operated to return to close the clamp claws 31A, 31A as shown in Fig. 15, and the process proceeds to P. _29. .

At _P29 , it is determined whether the sewing means 70 is stopped,
If it is stopped, proceed to P ₃₀ and move to material feeding means 3.
0 and proceeds to P ₃₁ , where the sewing starting end _60X1 of the object to be sewn 60A is stopped at the entrance 70a of the sewing means 70, that is, at the needle position (not shown) of the sewing means 70.

At P ₃₁ , when the sewing object feeding means 30 and the sewing object 70 stop, the elevating source 41 in the left and right pair of sewing object pressing means 40 is activated to lower the pressing plate 42, as shown in FIG. Then, the lower surface gently presses the upper surface of the object to be sewn 60A to position it and suppress expansion and contraction in the width direction. Then, by a comb-shaped pressing member (not shown) provided near the entrance 70a of the sewing means 70, the edge portion of the object to be sewn 60A, including the sewing start end _60X1 , is gently pressed from above. Proceed to page ₃₂ .

At _P32 , the sewing means 70 is operated to perform sewing while moving the object to be sewn 60A in the feeding direction _X2 .
At the same time as this sewing operation is started, the electromagnetic clutch constituting the tensile reaction force applying means 50 is disengaged. That is, the sewing object feeding means 30 is operated by the motor 33.
The relationship with M is cut off. Therefore, the sewing material feeding means 30 has its clamp claws 31A, 31A.
clamps the sewing end _60X2 of the sewing object 60A, and moves to follow the sewing object 60A, which is being sewn by the sewing means 70 and moves in the feeding direction _X2 . Braking members 51, 5
By setting the frictional force generated between 1 and the horizontal shafts 33C and 33C to an appropriate magnitude in advance, this frictional force is applied to the object to be sewn 60A as a tension suitable for sewing without variation. be done. This makes it possible to perform proper sewing, thereby improving yield and reliability.

Further, between P ₃₁ and P ₃₂ , a comb-shaped pressing member (not shown) provided near the entrance of the sewing means 70 is used to press the sewing starting end 60 of the sewing object 60A.
Before the edge including X ₁ is gently pressed from above,
Since the lower surface of the pressing plate 42 of the sewing object pressing means 40 gently presses the upper surface of the sewing object 60A for positioning and suppresses expansion and contraction in the width direction, immediately after that, the comb-shaped The object to be sewn 6 is pressed by the pressing member.
Even if the edge portion including the sewing start end 60X ₁ of 0A is gently pressed from above, the end edge portion including the sewing start end 60X ₁ can be prevented from unnecessarily extending in the width direction. Therefore, it is possible to reliably prevent a so-called drum stitch, which is a partial inward curvature of the sewing path caused by shrinkage of a portion that unnecessarily extends in the width direction after sewing.

Next, the process advances from P ₃₂ to P ₃₃ , where P ₃₃ is a pair of left and right clamp mechanisms 31, 31 of the sewing material feeding means 30.
The clamp claws 31A, 31A are opened by the operation of the opening/closing cylinder 31B, and the object to be sewn 6 is opened.
The clamp of 0A is released, and the elevating source 41 of the sewing object pressing means 40 is operated to return, and the pressing plate 42 is raised. Immediately after that, the sewing of the object to be sewn 60A is completed, and the loose thread is cut by a cutting means (not shown) as a finished product, and the outlet 70 of the sewing means 70
b and is sent out to the outside and accommodated as appropriate.

At P ₃₃ , immediately after the clamp claws 31A, 31A of the material feeding means 30 are opened, the lower surface of the lower support plate 33B abuts the ninth detector 33J, causing the motor 33M to rotate in the reverse direction and feeding the material to be sewn. At the same time as the means 30 is retreated, the air cylinder 32A of the elevating mechanism 32 is operated to return, and the piston rod 32a is moved back.
is lowered, the clamp mechanisms 31, 31 are lowered, and the process proceeds to P ₃₄ and P ₃₅ .

At this point, the next material to be sewn detected by proceeding from P ₂₇ to P ₁₀ , that is, the second tier from the top to be sewn 60B is moved to the position P ₂₃ by the material transport means. 20, the seventh detector 33J detects the sewing end _60X2 of the second sewing object 60B at P ₃₄ , and as a result, the sewing object feeding means 30 moves to the second sewing object 60B. It is determined whether or not the sewing material _is slightly upstream in the feed _direction
Proceeding to P ₃₇ , it is determined that the second sewing object 60B is set at the same position as described in P ₂₄ , and the process advances to P ₃₈ , where the sewing object feeding means 30 is _advanced . After proceeding to , the above-described operations are repeated to sequentially sew the third to-be-sewn object 60C to the lowest-sewn object 60N.

When the lowermost workpiece 60N is removed from the support plate 11 of the workpiece supplying means 10 at _P19 , the process proceeds to _P12 via _P20 to _P27 , and then to step 2 in FIG.
One of the connecting members 12 comes into contact with the detector 16, and it is determined whether or not the sewing material supplying means 10 has reached the upper limit position, and the process advances to _P13 , where the motor 14A is reversely rotated and the sewing material supplying means 10 lower. Then
Proceeding to _P14 , the one connecting member 12 comes into contact with the third detector 17, stopping the sewing material supplying means 10 at the lower limit position, and proceeding to _P15 , the buzzer is sounded and the material is placed on the support plate 11. Stacked items to be sewn 60A~
Informs that all 60N has been transferred to the upper surface 1A of the fuselage 1. Then, while proceeding from P ₁₂ to _{P 15} , the lowermost workpiece 60 is sewn by the above-described operation.
N, that is, the last object to be sewn 60N transferred to the upper surface 1A of the machine body 1 is sewn. Therefore, in this case, the object to be sewn 6 is detected by the seventh detector 33J.
Since 0 cannot be detected, the process proceeds from P ₃₃ to P ₃₅ . That is, it is determined in P ₃₅ whether or not the position where the lower surface of the lower support plate 33B of the article feeding means 30 contacts the eighth detector 33K, that is, whether the article feeding means 30 has returned to its origin, If it has returned, the process proceeds to P ₃₆ to stop the sewing material feeding means 30, and proceeds to P ₁₅ and P ₁₆ .

Incidentally, in the above embodiment, a case was explained in which the article to be sewn 60 in which the seat cover 60b was superimposed on the seat pad 60a having a flat surface was sewn, but as shown in FIG. A seat cover 60b is attached to a seat pad 60a in which a plurality of grooves 80, 80 extending in the longitudinal direction are formed.
This can also be applied to the case where the seat cover 60b is recessed and sewn along the grooves 80, 80 as shown in FIG. 18. That is, in this case, the grooves 80, 80 shown in FIG. 17 are avoided, and the comb-shaped spacer 8
1 is inserted between the seat pad 60a and the seat cover 60b in advance, and before sewing, as shown in FIG.
By pressing the pads b downward into the respective grooves 80, 80 and holding them, the seat pad 60a
Sewing can be performed while moving in the feeding direction while reliably preventing a relative positional shift between the seat cover 60a and the seat cover 60b and meandering of both 60a and 60b.

On the other hand, although the seat pad 60a made of a highly elastic material such as urethane foam has a large frictional resistance, the spacer 80a made of a thin steel plate or aluminum plate, etc.
1. In other words, by inserting the spacer 81 with low frictional resistance between the seat pad 60a and the seat cover 60b, contact between the seat pad 60a and the seat cover 60b with high frictional resistance can be avoided, and the seat cover 60b comes into contact with the spacer 81 having low frictional resistance. Therefore, when the seat cover 60b is pressed down at the lower end of the presser plate 42 in order to push the seat cover 60b along the grooves 80, 80 of the seat pad 60a, the widthwise sliding of the seat cover 60b is very good. Therefore, the seat cover 60b
Since the seat cover 60b can be easily and properly pushed into the grooves 80, 80, if the seat cover 60b is sewn while being partially improperly pushed in, the seat cover 60b
It can prevent the appearance of wrinkles.

(Effects of the Invention) As described above, according to the present invention, the stacked objects to be sewn are sequentially raised one by one to the supply position by the object providing means, and the objects to be sewn that have reached the supply position are are sequentially transferred to the upper surface of the machine body by the material transfer means until the transferred objects are sent to the sewing means by the material feeding means.
The object to be sewn is pressed loosely against the upper surface of the machine body by the object pressing means, the object to be sewn whose sewing start end is fed into the entrance is sewn by the sewing means, and the object to be sewn is carried out as a finished product. Since the work can be performed by automation, the productivity of single piece sewing (piece sewing), which is economically superior in terms of material collection, can be improved and economical efficiency can be further increased. In addition, the tensile reaction force applying means can apply an appropriate tension to the material to be sewn without variation during sewing, making it possible to perform appropriate sewing, improve yields, and achieve high reliability. It has the advantage of being able to provide sewn items.

[Brief explanation of drawings]

Fig. 1 is a schematic side view of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a front view thereof, Fig. 4 is a vertical side view of the object to be sewn, and Fig. 5 is a schematic exploded perspective view of each drive system. 6 is a side view of the holding mechanism in the means for transporting the object to be sewn, FIG. 7 is a side view showing the holding state of the object to be sewn, FIG. 8 is a side view of the means for feeding the object to be sewn, and FIG. 9 10 is a flowchart, and FIG. 10 is a schematic side view showing a state in which objects to be sewn are piled up on an object to be sewn supply means.
FIG. 11 is a schematic side view showing a state in which the object to be sewn is lifted up by the object to be sewn transport means, FIG. 12 is a schematic side view showing the state in which the object to be sewn has reached the upper position of the machine body, and FIG. The figure is a schematic side view showing the state in which the article to be sewn is transferred to the upper surface of the machine body, FIG. 14 is a schematic side view showing the clamp mechanism in the open state, and FIG.
16 is a schematic side view of the object pressing means, FIG. 17 is a perspective view showing a modified example of the object to be sewn, and FIG. 18 is a schematic side view showing the seat cover in the closed state. FIG. DESCRIPTION OF SYMBOLS 1... Machine body, 1A... Top surface, 10... Sewn material supply means, 20... Sewn material transport means, 30...
Sewn object feeding means, 40...sewn object pressing means,
50...Tensile reaction force applying means, 60, 60A to 60
N: Object to be sewn, 70: Sewing means, A: Supply position, X ₁ : Start end side of the machine body, X ₃ : End side of the machine body.

Claims (1)

[Claims] 1 Sewing means disposed at the terminal end of the machine body to sew and transport the objects to be sewn, and a sewing means disposed at the start end side of the machine body to intermittently raise the stacked objects one by one to a supply position. a sewing object supply means, a sewing object transporting means for sequentially holding the sewing objects that have reached the supply position and transferring them to the upper surface of the machine body, and the sewing means for transferring the sewing objects transferred to the upper surface of the machine body. a sewing material feeding means for feeding the sewing material into the entrance of the sewing machine; a sewing material pressing means for gently pressing the sewing material against the upper surface of the sewing machine until the sewing material is fed into the sewing means; A single automatic sewing device characterized in that it is equipped with a tensile reaction force applying means for applying force.