JP2009213774A - Belt loop feeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a belt loop feeder capable of favorably feeding a belt loop. <P>SOLUTION: This belt loop feeder 1 is provided with a feed mechanism 10, a pullout mechanism 20, a motor 12 as a drive source of the feed mechanism 10, a second motor as a drive source of the pullout mechanism 20, an encoder 12a for detecting the rotation angle of the motor 12, an encoder 23a for detecting the rotation angle of the motor 23, and a CPU 41 of a control device 40 that calculates a deviation between respective command angles to the motor 12 and the motor 23 and the rotation angles detected by the encoder 12a and the encoder 23a, determines whether or not the feed amount of a tape material T is appropriate based on the deviation and, when it is not appropriate, drivingly controls at least one of the motor 12 and the motor 23 to adjust the feed amount of the tape material T. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a belt loop supply device for supplying a belt material for forming a belt loop to a sewing machine.

  2. Description of the Related Art Conventionally, a sewing machine that sews a tape material forming a belt loop to a sewing object is provided with a belt loop supply device that supplies the tape material. The belt loop is a loop-shaped member that is provided on the waist of trousers, a skirt, or the like and is inserted through the belt. The tape material forming the belt loop is a flat tape-like cloth. When forming the belt loop, the tape material is cut to a predetermined length from the continuous tape material as described above, and the cut tape material is sewn. .

The configuration of a conventional belt loop supply apparatus 100 will be described with reference to FIG.
The belt loop supply device 100 includes a feeding mechanism 110 that feeds out a tape material (not shown) from the tape material feeding table 113 along the longitudinal direction by rotation of a roller 111 connected to a motor 112 via a toothed belt 114. The arm 121 connected to the motor 123 holds the leading end of the tape material that has been fed out and moves in the direction of the arrow B, and the drawing mechanism 120 that pulls out the tape material, and the tape material that has been drawn out and drawn out is a movable knife. A cutting mechanism 130 that cuts 131 by a predetermined length by lowering 131 with respect to the fixed knife 132 and a loop supply mechanism (not shown) that transports the cut tape material to the sewing machine are provided.

By the way, in the belt loop supply device described above, the rotation of the roller 111 of the feeding mechanism 110 and the tape material pulling-out operation of the drawing mechanism 120 are driven by individual motors 112 and 123, respectively. At this time, if a delay occurs in the rotation of the roller 111 by the motor 112 of the feeding mechanism 110, the amount of tape material drawn by the drawing mechanism 120 greatly exceeds the amount of feeding by the feeding mechanism 110. For this reason, the tape material between the drawing mechanism 110 and the drawing mechanism 120 is pulled strongly by the drawing mechanism 120, and since the tape material usually has stretchability, the tape material is greatly stretched. If the tape material is cut in this state, the tape material after being cut shrinks by the amount that was stretched before cutting, so the length is significantly shorter than the predetermined length for forming the belt loop. As a result, there is a problem that the belt loop is not long enough to form the belt loop. This problem is particularly noticeable when the tape material is a highly stretchable material, and becomes a serious quality problem in the sewing of the belt loop.
In order to solve this problem, a one-way clutch (not shown) is provided between the motor 112 and the roller 111 of the feeding mechanism, and the roller 111 feeds the tape material regardless of the driving speed of the motor 112 (right side in FIG. 8). 2. Description of the Related Art A belt loop supply device that prevents elongation of a tape material by enabling idling in the rotation direction is known (for example, Patent Document 1).
JP-A-11-128577

However, even in the conventional belt loop supply device, the tape generated between the drawing mechanism 120 and the feeding mechanism 110 when the feeding amount of the tape material by the feeding mechanism 110 is larger than the drawing amount of the tape material by the drawing mechanism 120. There was no way to prevent loosening of the material. For this reason, when the tape material is cut in a state where the slack has occurred, there is a problem that the tape material becomes longer than a predetermined length for forming the belt loop.
Further, even when a one-way clutch is used as described in Patent Document 1, if the tape material is a material having high stretchability, the tape material is stretched to absorb the tension to the tape material. As a result, the one-way clutch could not be idled. In this case, since the tape material is greatly stretched, if it is cut as it is, it becomes a length significantly shorter than a predetermined length for forming the belt loop, and is sufficiently long for forming the belt loop. There is a problem that it is no longer available. This problem becomes more prominent as the predetermined length of the tape material forming the belt loop is longer.
Furthermore, when the one-way clutch is caught for some reason and the tape material is then pulled strongly by the pulling mechanism when the catch is released, the tape material is pulled out suddenly by the reaction that the catch has been eliminated. As a result, the one-way clutch may overdrive, and the tape material may be pulled out longer than necessary. In this case, there is a problem that the tape material becomes longer than a predetermined length for forming the belt loop.

  SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention provides a belt loop supply device capable of feeding a belt material having a predetermined length even in a stretchable tape material and reliably supplying a belt loop having a predetermined length. For the purpose.

  According to the first aspect of the present invention, in the belt loop supply device that sequentially feeds out the belt material of the belt loop and cuts it into a predetermined length and supplies it to the sewing machine, the feeding device for feeding out the tape material in the longitudinal direction of the tape material. 10), a drawing means (20) for pinching the leading end of the tape material fed by the feeding means and pulling it out in the longitudinal direction of the tape material, and a driving source for the operation of the feeding means for feeding the tape material A first motor (12), a second motor (23) as a drive source for the operation of the drawing means to pull out the tape material, and a first detection means for detecting a rotation angle of the first motor ( 12a), second detection means (23a) for detecting the rotation angle of the second motor, command angle for the first motor and the first detection means Accordingly, the first calculation means (S5, S13) for calculating the deviation from the detected rotation angle, and the deviation between the command angle for the second motor and the rotation angle detected by the second detection means are calculated. Whether the feeding amount of the tape material is appropriate based on the second calculating means (S5, S13), the deviation calculated by the first calculating means and the deviation calculated by the second calculating means When the determination means (41, S7, S8, S14, S15) and the determination means determine that the feeding amount of the tape material is not appropriate, the first motor and the second motor Adjusting means (41, S9,) for controlling driving of at least one of the motors to adjust a deviation between the command angle and the rotation angle of the first motor and a deviation between the command angle and the rotation angle of the second motor; S 0, S16, S17), characterized in that it comprises a.

  According to a second aspect of the present invention, in the belt loop supply device according to the first aspect, the determination of the tape material feeding amount by the determination means is performed after the driving of the first motor and the second motor is stopped. It is performed before the tape material is cut.

  According to a third aspect of the present invention, in the belt loop supply device according to the first aspect, the determination of the amount of tape material fed out by the determination means is the first motor until the tape material is fed out a predetermined length. And during the driving of the second motor.

  According to a fourth aspect of the present invention, in the belt loop supply device according to the first aspect, the determination of the tape material feeding amount by the determining means is performed by the first motor until the tape material is fed out by a predetermined length. And while the second motor is being driven and after the drive stop tape material of the first motor and the second motor has been fed out by a predetermined length and before the tape material is cut. It is characterized by.

According to a fifth aspect of the present invention, in the belt loop supply device according to any one of the first to fourth aspects, the deviation calculated by the first calculating means and the deviation calculated by the second calculating means Storage means for storing a reference value for determining whether or not the feeding amount of the tape material is appropriate based on the above, first determination means for inputting the material of the cloth forming the tape material, and the tape Second determination means for inputting the thickness of the material, wherein the reference value is provided for each material and thickness of the cloth forming the tape material, and the determination means is determined by the first determination means. The input cloth material, the thickness of the tape material input by the second determining means, the reference value corresponding to the material and thickness of the cloth forming the tape material, and the feeding amount of the tape material are appropriate. Whether or not Characterized in that it.
The first determination means and the second determination means may be determined, for example, by inputting the material of the cloth forming the tape material or the thickness of the tape material by the operator, A mechanism for detecting the material and thickness of the cloth to be formed may be provided.

According to the first aspect of the present invention, the determination unit determines whether the feeding amount of the tape material is appropriate based on the deviation calculated by the first calculation unit and the deviation calculated by the second calculation unit. . The deviation calculated by the first calculating means at this time is a deviation between the command angle for the first motor and the rotation angle of the first motor detected by the first detecting means. The deviation varies depending on the tension applied to the tape material positioned between the drawing means and the feeding means.
For example, when the tension by the pulling means is acting strongly on the tape material, a force different from the driving force of the motor based on the command angle for the first motor works strongly on the first motor via the feeding means. The deviation between the command angle for the first motor and the rotation angle of the first motor detected by the first detection means becomes large. At this time, the tape material may be stretched due to tension, and if it is cut as it is, the tape material may be shorter than a predetermined length.
On the other hand, when the tension by the drawing means is weak, there is almost no force acting on the first motor other than the driving force of the motor based on the command angle for the first motor, so the command angle for the first motor and the first detection The deviation from the rotation angle of the first motor detected by the means becomes small. At this time, there is a possibility that the tape material is not pulled by the pulling means, or the tape material is loosened due to an excessive feeding amount.
The second motor is substantially the same as the first motor, but the direction in which the deviation occurs is reversed. That is, the deviation between the command angle of each motor generated by a force other than the driving force of the motor and the detected rotation angle is mainly determined by the tension on the tape material between the feeding means and the drawing means. The deviation of the first motor occurs on the drawing means side, and the deviation of the second motor on the drawing means occurs on the drawing means side.
Note that the state in which the tape material is drawn out by an appropriate length is a state in which the tape material is pulled by the drawing means to the extent that the tape material does not stretch. In this case, it is shown that the tape material is held between the drawing means and the drawing means in an optimum tension state that is not drawn out and does not loosen, and is not drawn too much and stretched.
In other words, the determining means uses the pulling means so that the state of the tape material determined based on the deviation calculated by the first calculating means and the deviation calculated by the second calculating means does not cause the tape material to expand. It is determined whether or not the amount of feeding of the tape material is appropriate by determining whether or not there is a deviation when the tape material is being pulled. That is, before the tape material is cut, it is determined whether the tape material is stretched by being strongly pulled by the determining means or is not loosened by being fed out too much.
Therefore, when the tape material is cut in a slack state, the tape material becomes longer than a predetermined length for forming the belt loop, and the tape material is cut in a greatly stretched state. As a result, the length becomes much shorter than a predetermined length for forming the belt loop, and the problem that the belt loop does not have a sufficient length for forming the belt loop can be solved. Therefore, the reliability of the belt loop supply device is greatly improved.
In addition, when it is determined by the determination means that the amount of feeding of the tape material is not appropriate, the adjustment means controls the drive of at least one of the first motor and the second motor to control the first motor. By adjusting the deviation between the command angle and the rotation angle and the deviation between the command angle and the rotation angle of the second motor, the feeding amount of the tape material is adjusted to be appropriate. As a result, the length of the tape material to be fed out becomes appropriate, so that the length of the tape material forming the belt loop is always appropriate, and high-quality belt loops can be sewn. Therefore, the sewing quality of the belt loop is greatly improved.

  According to the second aspect of the present invention, the determination of the feeding amount of the tape material by the determining means is performed after the driving of the first motor and the second motor is stopped and before the tape material is cut. That is, after the tape material feeding operation by the feeding device and the drawing device is completed, the determining device determines whether or not the tape material fed out by the feeding operation is appropriate before the tape material is cut. That is, even after the motors are stopped, if a large tension is generated on the tape, the motors are stopped with a large deviation between the command angle of each motor and the detected rotation angle. On the other hand, if the tension is not enough to cause the tape to sag, each motor is stopped with the deviation near zero. At this time, if it is not appropriate, the adjusting means controls the drive of at least one of the first motor and the second motor, and the deviation between the command angle and the rotation angle of the first motor and the second motor. By adjusting the deviation between the command angle and the rotation angle of the motor, adjustment is made so that the feeding amount of the tape material becomes appropriate. As a result, the feeding amount of the tape material is always appropriate when the tape material is cut, and the length of the cut tape material is always kept at a predetermined length. Therefore, the reliability of the belt loop supply device is greatly improved. In addition, the length of the tape material forming the belt loop is unified to a predetermined length, and the sewing quality of the belt loop is further improved.

According to the third aspect of the present invention, the determination of the amount of tape material fed out by the determining means is performed while the first motor and the second motor are being driven until the tape material is fed out for a predetermined length. In other words, whether the feeding amount of the tape material at that time is appropriate by the judging means while the tape material is being fed out by the feeding means and the drawing means, that is, whether the tape material is greatly expanded or contracted. If it is determined that there is significant expansion / contraction or slack, the adjusting means controls at least one of the driving of the feeding means and the drawing means to eliminate the expansion / contraction or slack. Thus, the belt loop supply device is controlled so that the tape material has an appropriate feeding amount when the feeding operation of the tape material having a predetermined length is completed. Therefore, the length of the tape material is always maintained at a predetermined length, and the reliability of the belt loop supply device is greatly improved. In addition, the length of the tape material forming the belt loop is unified to a predetermined length, and the sewing quality of the belt loop is further improved.
In addition, since the determination and adjustment of the tape material feed amount are performed during the tape material feed operation, the tape material can be cut immediately after the tape material feed operation is completed. Therefore, the supply cycle time of the tape material forming the belt loop is greatly shortened, and the sewing efficiency of the belt loop sewing using the belt loop supply device is greatly improved.

According to the fourth aspect of the present invention, the determination of the tape material feeding amount by the judging means is performed while the first motor and the second motor are being driven until the tape material is fed by a predetermined length, and the first motor. And after the driving of the second motor is stopped, that is, after the tape material is fed out by a predetermined length and before the tape material is cut. In other words, whether the feeding amount of the tape material at that time is appropriate by the judging means while the tape material is being fed out by the feeding means and the drawing means, that is, whether the tape material is greatly expanded or contracted. If it is determined that there is significant expansion / contraction or slack, the adjusting means controls at least one of the driving of the feeding means and the drawing means to eliminate the expansion / contraction or slack. Therefore, the length of the tape material is always maintained at a predetermined length, and the reliability of the belt loop supply device is greatly improved. In addition, the length of the tape material forming the belt loop is unified to a predetermined length, and the sewing quality of the belt loop is further improved. In addition, since the determination and adjustment of the tape material feed amount are performed during the tape material feed operation, the tape material can be cut immediately after the tape material feed operation is completed. Therefore, the supply cycle time of the tape material forming the belt loop is greatly shortened, and the sewing efficiency of the belt loop sewing using the belt loop supply device is greatly improved.
Further, after the tape material feeding operation by the feeding means and the drawing device is completed, the judging means determines whether or not the tape material fed out by the feeding operation is appropriate before cutting the tape material, and is not appropriate. In such a case, the adjusting means adjusts the feeding amount of the tape material to be appropriate. As a result, even if the tape material is not in an appropriate feeding amount after the tape material feeding operation by the feeding means and the drawing means is completed, the tape material feeding amount is always set at the time when the tape material is cut. Appropriate and the length of the cut tape material is always kept at a predetermined length. Therefore, the reliability of the belt loop supply device is greatly improved. In addition, the length of the tape material forming the belt loop is unified to a predetermined length, and the sewing quality of the belt loop is further improved.

  According to the invention of claim 5, the storage means stores a reference value corresponding to the material and thickness of the cloth forming the tape material, and the determination means uses the tape material input by the first determination means. The reference value corresponding to the material of the cloth to be formed and the thickness of the tape material input by the second determining means, the deviation between the command angle and the rotation angle of the first motor, and the command angle and the rotation angle of the second motor Based on the deviation, it is determined whether or not the feeding amount of the tape material is appropriate. In other words, the determination means uses the storage means for the deviation between the command angle and the rotation angle of the first motor and the deviation between the command angle and the rotation angle of the second motor, which change according to the material and thickness of the tape material. Based on a reference value corresponding to the material and thickness of the tape material, it is determined whether the feeding amount of the tape material indicated by each deviation is appropriate. Thereby, even if the material and thickness of the cloth forming the tape material change, the determination means can always preferably determine whether or not the feeding amount of the tape material is appropriate. Therefore, it becomes possible to supply a tape material having an appropriate length regardless of the material and thickness of the cloth forming the tape material, and the reliability of the belt loop supply device is further improved. In addition, the quality of the belt loop by the tape material supplied by the belt loop supply device becomes more stable and high, and the sewing quality of the belt loop is further improved.

(Overall configuration of belt loop supply device according to the present invention)
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
A belt loop supply device 1 according to the present invention is a belt loop supply device that supplies a tape material T for forming a belt loop to a sewing machine.
FIG. 1 is an explanatory view showing an embodiment of a belt loop supply device according to the present invention.
The belt loop supply device 1 includes a feeding mechanism 10 that feeds out the tape material T along the longitudinal direction of the tape material T from the tape material feed table 13, and a tape material T that sandwiches the leading end portion of the fed tape material T. A drawing mechanism 20 that operates to pull out, a cutting mechanism 30 that cuts the tape material T that has been fed out to a predetermined length, a loop supply mechanism (not shown) that transports the cut tape material T to a sewing machine, And a control device 40 (see FIG. 5) for controlling the operation of each part of the belt loop supply device 1.

The feeding mechanism 10 includes a roller 11 that feeds out the tape material T by rotational movement with the cylindrical outer peripheral portion in contact with the upper surface of the tape material T of the belt loop, and a motor that rotationally drives the roller 11 via the toothed belt 14. 12, a tape material feed base 13 that is provided on the opposite side of the feeding direction of the tape material T with respect to the roller 11 and serves as a base on which the tape material T is placed; A loose roll 15 that is rotatably provided at a position facing the roller 11 and sandwiches the tape material T between the outer peripheral portion thereof and the outer peripheral portion of the roller 11 is provided.
The tape material T is supplied to the roller 11 from the direction opposite to the drawing mechanism 20. That is, the tape material T is placed on the upper surface portion of the tape material delivery base 13 and is disposed so as to be sandwiched between the roller 11 and the loose roll 15. At this time, the roller 11 is rotated by the drive of the motor 12, so that the tape material T sandwiched between the roller 11 and the loose roll 15 is provided in the direction in which the drawing mechanism 20 is provided as the roller 11 rotates (the arrow in FIG. 1). B direction). Accordingly, the roller 11 of the feeding mechanism 10 that feeds the tape material T functions as “feeding means”, and the motor 12 that rotationally drives the roller 11 functions as “first motor”.

FIG. 2 is an explanatory view showing a case where the feeding mechanism 10 is viewed from an angle different from that in FIG.
Further, the feeding mechanism 10 has a thickness detection mechanism 16 that detects the thickness of the tape material T. The thickness detection mechanism 16 is a lever-like member that is provided rotatably around one end thereof, and has a thickness detection lever 16a whose other end rotates in the vertical direction with respect to the upper surface of the tape material delivery base 13, and a thickness. A potentiometer 16b is connected to one end of the detection lever 16a and detects the amount of rotation of one end of the thickness detection lever 16a. When the tape material T is placed on the upper surface of the tape material delivery table 13, the tape material T is sandwiched between the tape material delivery table 13 and the other end of the thickness detection lever 16a. That is, the other end portion of the thickness detection lever 16 a is positioned away from the upper surface of the tape material feed base 13 by the thickness of the tape material T. The detection value of the potentiometer 16b based on the rotation angle of the thickness detection lever 16a at this time, and the case where the tape material T is not on the upper surface of the tape material delivery table 13, that is, the other end of the thickness detection lever 16a is the upper surface of the tape material delivery table 13. The thickness of the tape material T can be detected from the detected value of the potentiometer 16b based on the rotation angle of the thickness detection lever 16a at the time of contact. Therefore, the tape material thickness detection mechanism 16 functions as a “second determining unit”.

  The driving of the motor 12 is controlled by the control device 40. Although not shown, the motor 12 is provided with an encoder 12 a that detects the rotation angle of the rotation shaft of the motor 12. The rotation angle of the rotation shaft of the motor 12 is detected by the encoder 12 a and output to the control device 40. The At this time, the control device 40 calculates the feed amount of the tape material T from the rotation angle of the motor 12 detected by the encoder 12a. That is, the rotation amount of the roller 11 that rotates with the drive of the motor 12 is obtained from the rotation angle of the motor 12 detected by the encoder 12a, and the feed amount of the tape material T that is sent out with the rotation of the roller 11 is calculated. Therefore, the encoder 12a functions as “first detection means”.

FIG. 3 is a plan view of the drawer mechanism 20 as viewed from above.
The drawing mechanism 20 includes an arm 21 that sandwiches the leading end portion of the tape material T fed by the feeding mechanism 10 and a direction extending substantially along the longitudinal direction of the tape material T that is fed, and the arm 21 extends in the extending direction. A rod 22 movably supported in a direction along the direction, a motor 23 as a drive source that moves the rod 22 in a direction along the extending direction, and a base portion 24 that movably supports the rod 22. Have.

  The arm 21 is provided with a fixed arm portion 21a fixed to the end portion of the rod 22 on the feeding mechanism 10 side, and one end portion thereof is provided so as to be rotatable in the vertical direction with respect to the distal end portion of the fixed arm portion 21a. Movable arm portion 21b. The other end of the movable arm portion 21 a is connected to the plunger portion of the air cylinder 25, and the movable arm portion 21 a rotates in the vertical direction by driving the air cylinder 25. That is, when the movable arm portion 21a rotates in the vertical direction with respect to the distal end portion of the fixed arm portion 21b, the arm 21 sandwiches and opens the distal end portion of the tape material T fed by the feeding mechanism 10.

The rod 22 is inserted through holes 24 a and 24 b provided in the base portion 24, and is provided so as to be movable in the extending direction of the rod 22. Further, as shown in FIG. 3, the rod 22 is provided so as to come into contact with the cylindrical outer peripheral portions of the rod driving rollers 26 and 27. The rod driving rollers 26 and 27 are rollers provided so as to be rotatable about a rotation shaft provided in a substantially vertical direction. Further, the rod driving roller 26 is provided so as to be rotationally driven by the rotational motion of the rotating shaft of the motor 23 being transmitted. Further, the rod driving roller 26 and the rod driving roller 27 are connected by a timing belt 28, and the rod 22 and the timing belt 28 are connected by a fixing member 22b. 22 moves along the extending direction of the rod 22. As a result, the arm 21 provided at the end of the rod 22 on the feeding mechanism 10 side moves.
The driving of the motor 23 and the air cylinder 25 is controlled by the control device 40. Although not shown, the motor 23 is provided with an encoder 23 a that detects the rotation angle of the rotation shaft of the motor 23. The rotation angle of the rotation shaft of the motor 23 is detected by the encoder 23 a and output to the control device 40. The At this time, the control device 40 calculates the position of the rod 22, that is, the position of the arm 21 from the rotation angle of the motor 23 detected by the encoder 23a. That is, the amount of rotation of the rod driving rollers 26 and 27 that rotate with the driving of the motor 23 is obtained from the rotation angle of the motor 23 detected by the encoder 23a, and the rod driving rollers 26 and 27 move with the rotation. The position of the arm 21 provided at the end of the rod 22 on the feeding mechanism 10 side is calculated. Therefore, the encoder 23a “functions as a second detection means.

FIG. 4 is an explanatory view showing the positional relationship between the roller 11 of the feeding mechanism, the arm 21 of the drawing mechanism 20, the movable knife 31a of the cutting mechanism 30, and the tape material T.
Before the feeding of the tape material T by the feeding mechanism 10, the arm 21 stands by at the last retracted position (operation reference position). At this time, the movable arm portion 21a is rotated upward. When the tape material T is fed out by the feeding mechanism 10, the arm 21 is advanced to the feeding mechanism 10 side accordingly, so that the tape material T reaches the most advanced position (grip position) of the arm 21 when the tape 21 is advanced. The tip of the material T is located between the movable arm portion 21a and the fixed arm portion 21b. At this time, the movable arm portion 21a is rotated downward by driving the air cylinder 25, and the leading end portion of the tape material T is sandwiched between the movable arm portion 21a and the fixed arm portion 21b. Thereafter, the arm 21 moves backward in the feeding direction of the tape material T at substantially the same speed as the feeding speed of the tape material T by the feeding mechanism 10. After that, when the feeding amount of the tape material T reaches a predetermined length of the tape material forming the belt loop, the feeding of the tape material T by the feeding mechanism 10 and the movement of the arm 21 of the drawing mechanism 20 are stopped. That is, the arm 21 sandwiches the leading end portion of the tape material T fed by the feeding mechanism 10 and moves so as to pull out the tape material T to the length of the tape material T forming a preset belt loop. Therefore, the drawing mechanism 20 that moves the arm 21 that holds the tip of the tape material T so as to pull out the tape material T functions as a “drawing device”. In addition, the motor 23 serving as a driving source for moving the arm 21, that is, for moving the rod 22, functions as a “second motor”.
The control device 40 controls the feeding operation by the feeding mechanism 10 and the tape material T drawing operation by the drawing mechanism 20 described above.

The cutting mechanism 30 includes a knife 31 that cuts the tape T that has been fed out, an air cylinder 32 that serves as a drive source for moving the movable knife 31a of the knife 31 up and down, a movable knife 31a that supports the movable knife 31a so as to move up and down. And a female bracket 33 for accommodating the movable knife 31a when 31a is raised.
The knife 31 has a movable knife 31a provided so as to be movable up and down with respect to the tape material T fed by the feeding mechanism 10, and the movable knife 31a descends below the tape material T fed by the feeding mechanism 10. At this time, it has a fixed knife 31b provided at a position to mesh with the movable knife 31a. That is, when the movable knife 31a is lowered to the tape material T and meshes with the fixed knife 31b, the tape material T is cut. The movable knife 31 a is connected to the plunger portion of the air cylinder 32, and the movable knife 31 a is moved up and down by driving the air cylinder 32. The air cylinder 32 is driven by the control device 40.

  As shown in FIG. 4, the position where the tape material T is cut by the knife 31 is relative to the position (set position) where the tape material T is sandwiched between the roller 11 and the loose roll 15 of the feeding mechanism 10. It is provided to be a predetermined distance.

  The loop supply mechanism has two transport arm portions (not shown) that respectively grip the vicinity of both ends of the tape material T cut by the cutting mechanism 30 and transport it to the sewing machine. The tape material T cut by the cutting mechanism 30 is gripped in the vicinity of both ends by the transport arm portion. Thereafter, the arm 21 of the drawer mechanism 20 in a state where the leading end portion of the tape material T is sandwiched, the movable arm portion 21a is rotated upward by driving the air cylinder 25, and the leading end portion of the tape material T is moved. Open. Thereafter, the arm 21 moves to the last retracted position, and the transport arm portion operates to transport the cut tape material T to the sewing machine.

(Control device)
Next, the control device 40 will be described in detail. FIG. 5 is a functional block diagram showing the configuration of the control device 40.
The control device 40 includes a CPU 41 that performs various processes in the operation of the belt loop supply device 1, a ROM 42 that stores various programs and data for the CPU 41 in a non-rewritable manner, and various types of processing when the CPU 41 performs processing. A RAM 43 for storing programs and data, an EEPROM 44 for rewritably storing various programs and data for the CPU 41 to perform processing, and an I / O interface 45 for connecting the control device 40 and each part of the belt loop supply device 1. And have.
The CPU 41 of the control device 40 calls and executes software and data corresponding to various operations of the belt loop supply device 1 from the ROM 42 or the EEPROM 44 and controls the operation of the belt loop supply device 1. Further, the control device 40 displays various information of the motor 12, the encoder 12a, the motor 23, the encoder 23a, the air cylinder 25, the air cylinder 32, and the belt loop supply device 1 via the I / O interface 45, and the belt loop. It is connected to each part of the belt loop supply device 1 such as an operation panel 50 capable of performing various input operations relating to the operation of the supply device 1. The CPU 41 of the control device 40 performs various processes according to the input contents of the encoder 12a, encoder 23a, potentiometer 16b, operation panel 50, etc., and controls the motor 12, motor 23, air cylinder 25, air cylinder 32, and the like.

  Further, the EEPROM 44 stores reference values d1 and d2 for the CPU 41 of the control device 40 to determine whether or not the feeding amount of the tape material T is appropriate. The reference values d1 and d2 are a lower limit value and an upper limit value for determining whether or not a value obtained by subtracting the deviation of the motor 12 from the deviation of the motor 23 is appropriate. The deviation of the motor 23 is a deviation between the rotation angle of the rotation axis of the motor 23 detected by the encoder 23a and the rotation angle of the rotation axis of the motor 23 according to the drive command performed by the CPU 41 with respect to the motor 23. The deviation of the motor 12 is a deviation between a command angle of the rotation axis of the motor 12 based on a drive command performed by the CPU 41 with respect to the motor 12 and a rotation angle of the rotation axis of the motor 12 detected by the encoder 12a. D1 and d2 are reference values when the length of the tape material T to be cut is a predetermined length L. Details of the reference values d1 and d2 will be described later.

(control panel)
The operation panel 50 is a so-called touch panel display on which various information of the belt loop supply device 1 is displayed and various input operations relating to the operation of the belt loop supply device 1 can be performed. The operator can confirm various information regarding the operation of the belt loop supply device 1 via the operation panel 50, and can perform various settings and inputs as necessary. For example, when a screen for setting the material of the cloth used for the tape material T of the belt loop is displayed, a list of the material of the cloth is displayed on the operation panel 50. At this time, the material of the cloth is displayed as an independent button, and the operator can set it by pressing the button of the material corresponding to the material used for the tape material T. Therefore, the operation panel 50 functions as “first determination means”.
The length of the tape material T forming the belt loop, that is, the length when the tape material T is cut, is also set via the operation panel 50. In this case, a screen for numerically inputting the length of the tape material forming the belt loop is displayed, and the operator can set an arbitrary value.

(Motor drive control based on deviation)
Next, among the processes performed by the control device 40, the command angle for the motor 12 and the motor 23 in driving the motor 12 and the motor 23, the rotation angle of the motor 12 detected by the encoder 12a, and the rotation angle of the motor 23 detected by the encoder 23a. The drive control of the motor 12 and the motor 23 based on the deviations respectively generated between the motor 12 and the motor 23 will be described in detail. FIG. 6 is a conceptual diagram showing the relationship between the strength of the tension S generated in the tape material T and the direction in which the deviation of the motor 12 and the deviation of the motor 23 occur. 6A shows a case where an appropriate tension S is generated on the tape material T, and FIG. 6B shows a case where a tension S larger than the appropriate tension S is generated on the tape material T. c) shows a case where no tension S is generated in the tape material T.
When the tape material T is fed out under the control of the CPU 41 of the control device 40, the CPU 41 first issues a drive command to the motor 12 of the feeding mechanism 10. At this time, a drive command for the motor 12 is output as a command angle O of the rotating shaft of the motor 12. That is, the CPU 41 controls the rotation axis of the motor 12 to drive to the command angle O. Further, when the motor 12 is driven, the rotation angle P of the rotating shaft of the motor 12 is detected by the encoder 12a every predetermined time.
In this embodiment, in order to detect both excessive tension and looseness of the tape material T, the feeding amount of the feeding mechanism 10 is set to be slightly smaller than the pulling amount of the drawing mechanism 20. Yes. As a result, an appropriate tension S is generated in the tape material T between the feeding mechanism 10 and the drawing mechanism 20 in an appropriate feeding state of the tape material. By setting in this way, it is possible to detect a state in which the tape material T is slack (a state in which the tension is substantially zero). Accordingly, as shown in FIG. 6A, when the tape material T is properly fed and drawn, the motor 12 of the feeding mechanism 10 receives a slight tension S in the direction of the drawing mechanism 20. This results in a deviation of the preceding state with respect to the command angle for the motor 12.
On the other hand, a delay with respect to the command angle O occurs in the actual rotation of the motor 12. The degree of delay of the motor 12 varies depending on the load applied to the motor 12, and the delay increases as the load increases. That is, when the motor 12 is delayed, the load generated on the motor 12 is large, and some trouble has occurred in the feeding operation of the tape material T (for example, the tape material is caught and properly fed out). Etc.). Further, the tape material T slips with respect to the roller 11 of the feeding mechanism 10 due to the tension S applied to the tape material T by the drawing mechanism 20, and the tape material T is drawn more than the amount of feeding by the feeding mechanism 10. There is. In this case, the tape material T is loosened between the feeding mechanism 10 and the drawing mechanism 20, or the tension S due to the drawing mechanism 20 hardly occurs even if the tape material T is not loosened. Therefore, the preceding state of the motor 12 due to the tension S is almost eliminated, and the deviation of the motor 12 is close to zero.

  The deviation between the command angle Q for the motor 23 and the rotation angle R detected by the encoder 23a is substantially the same as the deviation between the command angle O for the motor 12 and the rotation angle P detected by the encoder 12a. Occurs. However, the deviation of the motor 23 is caused by the tension of the tape material T so that the rotation angle R is delayed with respect to the command angle Q. The magnitude of the deviation of the motor 23 varies depending on the magnitude of the tension S applied to the tape material T by the drawing mechanism 20. For example, when an appropriate tension S is applied to the tape material T, the deviation of the motor 23 is slightly generated on the drawing mechanism side. On the other hand, when the feeding operation of the tape material T is delayed due to some reason that the feeding mechanism 10 has failed, a large tension S is generated in the tape material T because only the pulling of the tape material T by the drawing mechanism 20 precedes. As a result, a large load is generated on the motor 23, and the deviation of the motor 23 increases. Further, when the roller 11 of the feeding mechanism 10 and the tape material T slip, and the tape material T is pulled out beyond the feeding amount of the feeding mechanism 10, almost no tension S is applied to the tape material T. The load on the motor 23 decreases and the deviation of the motor 23 becomes close to zero.

That is, when both the feeding amount and the drawing amount of the tape material T are appropriate, as shown in FIG. 6A, the deviation of the motor 12 causes the detected rotation angle to be slightly on the drawing mechanism 20 side with respect to the command angle. Prior to this, the deviation of the motor 23 slightly delays the detected rotation angle toward the feeding mechanism 10 with respect to the command angle. On the other hand, when a large tension S is generated in the tape material T, that is, when any trouble occurs in the feeding of the tape material T by the feeding mechanism 10, as shown in FIG. Is a state in which the rotation angle is significantly delayed from the command angle. Further, when the tape material T is slack or almost no tension S is generated, that is, when the tape material T and the roller 11 of the feeding mechanism 10 slip, as shown in FIG. The deviation and the deviation of the motor 23 are close to zero.
The CPU 41 of the control device 40 causes the motor 12 so that the tape material T positioned between the feeding mechanism 10 and the drawing mechanism 20 has a deviation between the motor 12 and the motor 23 at which the tension S is slightly generated by the drawing mechanism 20. The motor 23 is driven and controlled.
Note that the command angle O of the motor 12 and the command angle Q of the motor 23 in FIGS. 6A, 6B, and 6C are substantially perpendicular to the rotation axis of each motor. A different angle is output as a drive command for each command angle.

  The magnitude of the deviation of the motor 12 and the deviation of the motor 23 generated when the tension S is generated in the tape material is the material and thickness of the cloth forming the tape material T, and the tape material T when the tape material T is cut. Varies depending on the amount of feed. Along with this, the deviation of the motor 12 and the deviation of the motor 23 which show a state where the tape material T is slightly pulled also change. Therefore, the CPU 41 of the control device 40 makes a deviation between the motor 12 and the motor 23 according to the material and thickness of the cloth forming the tape material T and the amount of feeding of the tape material T when the tape material T is cut. Drive control of the motor 12 and the motor 23 is performed.

Specifically, first, the CPU 41 of the control device uses the reference values D1 and D2 for driving and controlling the motor 12 and the motor 23 so that the deviation between the motor 12 and the motor 23 is in accordance with the material and thickness of the cloth forming the cloth. Is calculated. The reference values D1 and D2 are calculated by the following formulas (1) and (2).
D1 = d1 × (L / L1) × Km × Kt (1)
D2 = d2 × (L / L1) × Km × Kt (2)
L1 in the formulas (1) and (2) is a feed amount when the tape material T at that time is cut. As described above, since d1 and d2 are reference values when the length of the tape material T to be cut is the predetermined length L, depending on the feed amount when the tape material T is cut at that time. The corrected D1 and D2 are calculated.
Km is a unique numerical value determined for each material of the cloth forming the tape material T at that time. As Km, a unique numerical value preset for each material of the cloth forming the tape material T is stored in the EEPROM 44, and Km corresponding to the material of the cloth set by the operator via the operation panel 50 is used.
Kt is a unique numerical value determined for each thickness of the tape material T at that time. As the Kt, a unique numerical value preset for each thickness of the cloth forming the tape material T is stored in the EEPROM 44, and Kt corresponding to the thickness of the cloth detected by the thickness detecting mechanism 16 is used.
Therefore, the EEPROM 44 that stores a specific numerical value preset for each material of the cloth forming the tape material T and a specific numerical value preset for each thickness of the cloth forming the tape material T functions as a “storage means”. To do.

Next, the CPU 41 of the control device 40 controls the deviation Do of the motor 12 by the command angle with respect to the motor 12 and the encoder 12a in the control for operating the feeding mechanism 10 and the drawing mechanism 20 to perform the feeding operation of the tape material T. It is calculated from the detected rotation angle of the motor 12. Similarly, the deviation Dp of the motor 23 is calculated from the command angle for the motor 23 and the rotation angle of the motor 12 detected by the encoder 23a. Therefore, the CPU 41 of the control device 40 functions as “first calculation means” and “second calculation means”.
Next, the CPU 41 calculates the total output deviation Dop from the deviation Do of the motor 12 and the deviation Dp of the motor 23 by the following equation (3).
Dop = Dp × Kp−Do × Ko (3)
In Expression (1), Kp and Ko are the drive amounts of the respective motors caused by the friction of the power transmission mechanism (belt or the like) included in each of the drawing mechanism 20 and the feeding mechanism 10 and other factors, and the actual mechanism operation. It is an eigenvalue for correcting the difference between them. For Kp and Ko, optimum values measured in advance by the verification operation of the belt loop supply device 1 are used, and Kp and Ko are stored in the ROM 42 or the EEPROM 44.
That is, the total output deviation Dop is a deviation between the operation delay amount of the drawing mechanism 20 obtained based on the deviation Dp of the motor 23 and the operation delay amount of the feeding mechanism 10 obtained based on the deviation Do of the motor 12. It is.
At this time, the deviation Do of the motor 12 treats the deviation in the preceding state as a positive deviation and the deviation in the delayed state as a negative deviation. The deviation Dp of the motor 23 treats the delay state deviation as a positive deviation and the preceding state deviation as a negative deviation.

  Next, the CPU 41 compares the total output deviation Dop with the reference values D1 and D2. At this time, when D1 ≦ Dop ≦ D2 holds, the deviation of the motor 12 and the deviation of the motor 23 are within appropriate ranges. That is, the tension applied by the drawing mechanism 20 to the tape material T between the feeding mechanism 10 and the drawing mechanism 20 is appropriate, and the tape material T is in a state where it does not stretch or loosen. In this case, since the feeding amount of the tape material T is appropriate, special drive control for the motor 12 and the motor 23 is not performed. On the other hand, when D1> Dop, the tape material T is slack or the proper tension is not generated, that is, the tape material T and the roller 11 of the feeding mechanism 10 slip, and the tape material T exceeds the feeding amount. Indicates that it has been pulled out. Therefore, the CPU 41 increases the drawing amount of the tape material T by the drawing mechanism 20 by increasing the rotation speed of the motor 23, and decreases the feeding amount of the tape material T by the feeding mechanism 10 by decreasing the rotation speed of the motor 12. This eliminates the slack of the tape material T. When D2 <Dop, the operation amount of the feeding mechanism 10 with respect to the operation amount of the drawing mechanism 20 because the tension generated in the tape material T is too large, that is, some trouble has occurred in the feeding of the tape material T. Is late. At this time, the tape material T between the feeding mechanism 10 and the drawing mechanism 20 is often strongly pulled by the drawing mechanism 20 and greatly stretched. Therefore, the CPU 41 decreases the amount of tape material T drawn by the drawing mechanism 20 by lowering the rotation speed of the motor 23, and increases the amount of feeding of the tape material T by the feeding mechanism 10 by increasing the rotation speed of the motor 12. This eliminates the elongation of the tape material T.

  The drive control of the motor 12 and the motor 23 by the above processing is performed during the feeding operation of the tape material T, that is, during the driving of the motor 12 and the motor 23, but after the feeding operation of the tape material T is completed, that is, the motor 12 and the motor 23. It is also performed after the stop. However, the length of the tape material T between the drawing mechanism 10 and the drawing mechanism 20 is changed when the drawing mechanism 20 is operated by driving the motor 23 after the drawing operation of the tape material T is completed and the position of the arm 21 is moved. There is a possibility that the tape material T set in advance deviates from the feed amount when the tape material T is cut. Therefore, it is desirable to appropriately adjust the tension S with respect to the tape material T by performing only the drive control of the motor 12 after the completion of the feeding operation of the tape material T. For example, when the tape material T is fed out too much by the feeding mechanism 10 and the tape material T is loosened, the CPU 41 operates to rewind the tape material T fed out by rotating the motor 12 in the reverse direction to the feeding direction. The operation is controlled so that the tension S is applied to the tape material T. Further, when the tape material T is strongly pulled by the drawing mechanism 20 and the tape material T is greatly extended, the CPU 41 drives the motor 12 again in the feeding direction to feed the tape material T, and the tape material T The operation is controlled so as to eliminate the elongation. At this time, it is desirable that the driving amount of the motor 12 be performed with the minimum resolution of the motor 12. This facilitates fine adjustment of the tension S with respect to the tape material T.

As described above, the CPU 41 of the control device 40 determines the total output deviation Dop calculated based on the deviation Do of the motor 12 and the deviation Dp of the motor 23, the length L1 of the tape material T forming the belt loop, and the tape material T. Whether the feeding amount of the tape material T is appropriate from the specific value Km corresponding to the material of the cloth forming the material and the reference values D1 and D2 calculated based on the specific value Kt corresponding to the thickness of the tape material T judge. Therefore, the CPU 41 of the control device 40 functions as “determination means”. Further, when the CPU 41 of the control device 40 determines that the feeding amount of the tape material T is not appropriate as a result of the determination based on the total output deviation Dop and the reference values D1 and D2, at least one of the motor 12 and the motor 23 is selected. The amount of feeding of the tape material T is adjusted by driving the motor. Therefore, the CPU 41 of the control device 40 functions as “adjustment means”.
Note that the calculation of D1, D2, and Dop and the determination of D1 ≦ Dop ≦ D2 are performed in an extremely short time cycle, and when Dop is not within the range of D1 ≦ Dop ≦ D2, Dop is immediately set to D1. The motors 12 and 23 are driven and controlled so as to be within the range of ≦ Dop ≦ D2.

(Operation of belt loop feeder)
Next, the operation of the belt loop supply device 1 will be described in detail. FIG. 7 is a flowchart showing the operation of the belt loop supply device 1.
First, various settings are performed by the operator via the operation panel 50 (step S1). The various settings are the length of the belt loop, that is, the length of the tape material T after cutting, the material of the cloth forming the tape material T, and the like. Thereafter, the tape material T is installed in the feeding mechanism 10 so that the front end portion of the tape material T is wound between the roller 11 and the loose roll 15. At this time, the thickness of the tape material T is detected by the thickness detection mechanism 16 (step S2). The CPU 41 of the control device 40 calculates the reference values D1 and D2 from the length of the belt loop input in step S1, the material of the tape material T, and the thickness of the tape material T detected in step S2 (step S3). ). Thereafter, the motor 41 and the motor 23 are driven by the CPU 41, and the feeding operation of the tape material T and the operation of the drawing mechanism 20 are started (step S4).
Further, the deviations Do and Dp are calculated by the start of the operation (step S5, first calculation means and second calculation means).

  The CPU 41 of the control device 40 calculates the total output deviation Dop based on the equation (3) from the command angle for the motor 12 and the motor 23 and the rotation angle of the motor 12 and the motor 23 detected by the encoders 12a and 23a (step S6). . At this time, the CPU 41 determines whether or not the total output deviation Dop satisfies D1 ≦ Dop ≦ D2 (step S7, determination means). When it is determined that the total output deviation Dop does not satisfy D1 ≦ Dop ≦ D2 (step S7: No), the CPU 41 determines whether or not the total output deviation Dop satisfies D1> Dop (step S8, determination means). . When the total output deviation Dop satisfies D1> Dop (step S8: YES), the tape material T is in a slack or almost no tension S (the state shown in FIG. 6C), so the CPU 41 Decreases the rotational speed of the motor 12 and increases the driving speed of the motor 23 (step S9). When the total output deviation Dop does not satisfy D1> Dop (step S8: NO), this means that D2 <Dop. At this time, the tension S of the tape material T is too large (FIG. 6B). ), The CPU 41 increases the rotational speed of the motor 12 and decreases the driving speed of the motor 23 (step S10). Thereafter, the CPU 41 determines whether or not the tape material T has been sent out by the length of the belt loop (step S11). If it is determined that the total output deviation Dop satisfies D1 ≦ Dop ≦ D2 (step S7: YES), the tension S of the tape material T is in an appropriate state (the state shown in FIG. 6A). To step S11. The processes in steps S5 to S11 are repeated until the tape material T is fed out by the length of the belt loop (step S11: NO).

When the tape material T is sent out by the length of the belt loop (step S11: YES), the CPU 41 of the control device 40 stops driving the motor 12 and the motor 23 to stop the feeding operation of the tape material T (step S12). . Thereafter, the CPU 41 calculates the total output deviation Dop from the command angle for the motor 12 and the motor 23 when the feeding operation is stopped and the rotation angle of the motor 12 and the motor 23 detected by the encoders 12a and 23a (step S13, first calculation). Means and second calculation means). At this time, the CPU 41 determines whether or not the total output deviation Dop satisfies D1 ≦ Dop ≦ D2 (step S14, determination means). When it is determined that the total output deviation Dop does not satisfy D1 ≦ Dop ≦ D2 (step S14: No), the CPU 41 determines whether or not the total output deviation Dop satisfies D1> Dop (step S15, determination means). . When the total output deviation Dop satisfies D1> Dop (step S15: YES), the tape material T is in a slack or almost no tension S (the state shown in FIG. 6C). Rotates the motor 12 in the reverse direction with respect to the rotation direction when the tape T is paid out (step S16). When the total output deviation Dop does not satisfy D1> Dop (step S15: NO), this means that D2 <Dop. At this time, the tension S of the tape T is too large (FIG. 6B). )), The CPU 41 rotates the motor 12 again in the feeding direction of the tape material T (forward rotation) (step S17). Thereafter, the process returns to step S13. When it is determined that the total output deviation Dop satisfies D1 ≦ Dop ≦ D2 (step S14: YES), the CPU 41 ends the feeding operation of the tape material T. The processes in steps S13 to S17 are repeated until it is determined in step S14 that the total output deviation Dop satisfies D1 ≦ Dop ≦ D2, that is, the tension S of the tape material T becomes appropriate.
Thereafter, the cutting mechanism 30 operates to cut the tape material T, and the tape material T cut by the loop supply mechanism is conveyed to the sewing machine.
Steps S7, S8, S14, and S15 constitute determination means, and steps S9, S10, S16, and S17 constitute adjustment means.

(Operational effect of the belt loop supply device according to the present invention)
According to the above-described embodiment, the CPU 41 of the control device 40 determines whether the feeding amount of the tape material T is appropriate based on the deviation of the motor 12 and the deviation of the motor 23. That is, the CPU 41 of the control device 40 causes the tape material T to be determined by the drawing mechanism 20 so that the state of the tape material T determined based on the deviation of the motor 12 and the deviation of the motor 23 does not extend. It is determined whether or not the feeding amount of the tape material T is appropriate by determining whether or not there is a deviation in the case where the tape is pulled. Therefore, when the tape material is cut in a slack state, the tape material becomes longer than a predetermined length for forming the belt loop, and the tape material is cut in a greatly stretched state. As a result, the length becomes much shorter than a predetermined length for forming the belt loop, and the problem that the belt loop does not have a sufficient length for forming the belt loop can be solved. Therefore, the reliability of the belt loop supply device is greatly improved.
In addition, when the CPU 41 of the control device 40 determines that the feeding amount of the tape material T is not appropriate, the CPU 41 of the control device 40 controls the driving of at least one of the motor 12 and the motor 23 to comprehensively. By adjusting the output deviation Dop, adjustment is made so that the feeding amount of the tape material T becomes appropriate. As a result, the length of the tape material T to be fed out becomes appropriate, so that the length of the tape material T forming the belt loop is always appropriate, and high-quality belt loops can be sewn. Therefore, the sewing quality of the belt loop is greatly improved.

Further, the CPU 41 of the control device 40 determines the feeding amount of the tape material T based on the length before the tape material T is cut (the cutting position of the tape material T and the set position of the feeding mechanism 10 at a preset length). During the driving of the motor 12 and the motor 23 until they are fed out, and after the tape material T has been fed out by the length before cutting, that is, the motor 12 and the motor 23 This is performed after the driving is stopped and before the tape material T is cut. In other words, whether the feeding amount of the tape material T at that time is appropriate by the CPU 41 while the feeding operation of the tape material T by the feeding mechanism 10 and the drawing mechanism 20 is being performed, that is, the tape material T is greatly expanded or contracted. If the total output deviation Dop is determined not to be within the range of D1 ≦ Dop ≦ D2, at least one of the driving of the motor 12 and the motor 23 is controlled to eliminate the expansion or contraction. The Therefore, the length of the tape material T is always maintained at a predetermined length, and the reliability of the belt loop supply device is greatly improved. In addition, the length of the tape material T forming the belt loop is unified to a predetermined length, and the sewing quality of the belt loop is further improved. In addition, since the determination and adjustment of the feeding amount of the tape material T are performed during the feeding operation of the tape material T, the adjustment after the tape material feeding operation is completed is unnecessary or very slight. The tape material T can be quickly cut. Therefore, the supply cycle time of the tape material forming the belt loop is greatly shortened, and the sewing efficiency of the belt loop sewing using the belt loop supply device is greatly improved.
Further, after the feeding operation of the tape material T by the feeding mechanism 10 and the drawing mechanism 20 is completed, before the cutting of the tape material T, whether or not the feeding amount of the tape material T fed by the feeding operation is appropriate is determined by the control device 40. If the CPU 41 determines that the tape material T is not appropriate, the CPU 41 controls the drive of the motor 12 to adjust the tape material T feed amount to adjust the tape material T feed amount. As a result, even when the tape material T is not in an appropriate amount after the feeding operation of the tape material T by the feeding mechanism 10 and the drawing mechanism 20 is completed, the tape material is always used when the tape material T is cut. The feeding amount of T is appropriate, and the length of the cut tape material T is always kept at a predetermined length. Therefore, the reliability of the belt loop supply device is greatly improved. In addition, the length of the tape material forming the belt loop is unified to a predetermined length, and the sewing quality of the belt loop is further improved.

  Further, the EEPROM 44 of the control device 40 stores unique numerical values Km and Kt corresponding to the material and thickness of the cloth forming the tape material T, and the CPU 41 of the control device 40 stores the tape material T forming the belt loop. Whether the feeding amount of the tape material T is appropriate based on the lengths L1, the numerical values Km and Kt corresponding to the material and thickness of the cloth forming the tape material T, the deviation of the motor 12 and the deviation of the motor 23 judge. That is, the CPU 41 changes the deviation of the motor 12 and the motor 23 according to the material of the tape material T input by the operator via the operation panel 50 and the thickness of the tape material T detected by the thickness detection mechanism 16. For the deviation, it is determined from the EEPROM 44 whether or not the feeding amount of the tape material T indicated by each deviation is appropriate based on the specific values Km and Kt corresponding to the material and thickness of the tape material T. Thus, even if the material or thickness of the cloth forming the tape material T changes, the CPU 41 can always suitably determine whether or not the feeding amount of the tape material T is appropriate. Therefore, it is possible to supply the tape material T having an appropriate length regardless of the material and thickness of the cloth forming the tape material T, and the reliability of the belt loop supply device is further improved. In addition, the quality of the belt loop by the tape material supplied by the belt loop supply device becomes more stable and high, and the sewing quality of the belt loop is further improved.

(Other)
The feeding amount of the tape material T is determined by determining whether the tension S of the tape material T is appropriate from the calculation method of D1, D2, and Dop according to the above-described embodiment, the deviation of the motor 12, and the deviation of the motor 23. The determination method is merely an example, and another calculation formula or determination method may be used. For example, the absolute values of the deviation of the motor 12 and the deviation of the motor 23 may be taken, and the determination may be made according to the addition result.
In the above-described embodiment, the thickness of the tape material T is detected by the thickness detection mechanism 16. However, the thickness may be set by inputting the thickness of the tape material T from the operation panel 50. .
Further, the roller 11 or the loose roll 15 of the feeding mechanism 10 may be provided so as to be movable in the vertical direction with respect to the tape material T. As a result, the feeding mechanism 10 can flexibly feed the tape material T by changing the material and thickness of the tape material T.

It is explanatory drawing which shows one Embodiment of the supply apparatus of the belt loop by this invention. It is explanatory drawing which shows the case where the drawing | feeding-out mechanism is seen from the angle different from FIG. It is the top view which looked at the drawer mechanism from the upper part. It is explanatory drawing which shows the positional relationship of the roller of a drawing mechanism, the arm of a drawing mechanism, the movable knife 3 of a cutting mechanism, and a tape material. It is a functional block diagram which shows the structure of a control apparatus. It is explanatory drawing which shows the relationship between the strength of the tension | tensile_strength which has arisen in the tape material, and the direction in which the deviation of each motor arises. 6A shows a case where an appropriate tension is generated in the tape material, FIG. 6B shows a case where a tension larger than the appropriate tension is generated in the tape material, and FIG. Shows the case where no tension is generated. It is a flowchart which shows operation | movement of the supply apparatus of a belt loop. It is explanatory drawing which shows the structure of the supply apparatus of the belt loop by a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Feeding mechanism 11 Roller 12 Motor 12a Encoder 16 Thickness detection mechanism 20 Drawer mechanism 21 Arm 22 Rod 23 Motor 23a Encoder 30 Cutting mechanism 40 Controller 41 CPU
42 ROM
44 EEPROM
50 Operation panel

Claims (5)

In the belt loop supply device that sequentially feeds out the belt loop tape material and cuts it to a predetermined length and supplies it to the sewing machine,
A feeding means for feeding out the tape material in the longitudinal direction of the tape material;
A drawing means for pulling out in a longitudinal direction of the tape material by pinching a tip portion of the tape material fed by the feeding means;
A first motor as a drive source for the operation of feeding the tape material by the feeding means;
A second motor as a drive source for the pulling means to pull out the tape material;
First detection means for detecting a rotation angle of the first motor;
Second detection means for detecting a rotation angle of the second motor;
First calculation means for calculating a deviation between a command angle for the first motor and a rotation angle detected by the first detection means;
Second calculation means for calculating a deviation between a command angle for the second motor and a rotation angle detected by the second detection means;
Determining means for determining whether the amount of feeding of the tape material is appropriate based on the deviation calculated by the first calculating means and the deviation calculated by the second calculating means;
When the determining means determines that the amount of feeding of the tape material is not appropriate, the command of the first motor is controlled by controlling the driving of at least one of the first motor and the second motor. An apparatus for supplying a belt loop comprising adjusting means for adjusting a deviation between an angle and a rotation angle and a deviation between a command angle and a rotation angle of the second motor.   The determination of the amount of tape material fed out by the determination means is performed after the drive of the first motor and the second motor is stopped and before the tape material is cut. The belt loop supply device described.   The determination of the amount of tape material fed out by the determining means is performed during driving of the first motor and the second motor until the tape material is fed out for a predetermined length. Belt loop feeding device.   The determination of the tape material feed amount by the determining means is performed while the first motor and the second motor are being driven and the first motor and the second motor until the tape material is fed a predetermined length. 2. The belt loop supply device according to claim 1, which is performed after the drive stop tape material is fed out by a predetermined length and before the tape material is cut. Storage means for storing a reference value for determining whether or not the feeding amount of the tape material is appropriate based on the deviation calculated by the first calculation means and the deviation calculated by the second calculation means; ,
First determining means for inputting a material of a cloth forming the tape material;
Second determining means for inputting the thickness of the tape material,
The reference value is provided for each material and thickness of the cloth forming the tape material,
The determination means corresponds to the material of the cloth input by the first determining means, the thickness of the tape material input by the second determining means, and the material and thickness of the cloth forming the tape material. The belt loop supply device according to any one of claims 1 to 4, wherein it is determined whether or not the feeding amount of the tape material is appropriate based on a reference value.

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