JP5117836B2 - Belt loop feeder - Google Patents

Description

  The present invention relates to a belt loop supply device that supplies a belt loop cut to a predetermined length to a sewing machine that sews a belt loop to a sewing product.

  Conventionally, a sewing machine has been developed in which a plurality of belt loops for passing a belt are sewn on the waist of a sewing product such as jeans, pants, and a skirt. Such a sewing machine includes a belt loop supply device that supplies a belt loop to a predetermined position on the sewing machine bed during a sewing operation (see, for example, Patent Document 1).

The belt loop supply device includes a feeding means for feeding out the belt-shaped belt loop material, a drawing means for drawing out the belt loop material, a cutting means for cutting the belt loop material, a loop supply means for conveying and supplying the belt loop to the sewing machine, and the like. The following series of operations are repeated during belt loop sewing work.
First, when the belt-shaped belt loop material is fed out by the feeding means, for example, the chuck of the drawing means located at an opposing position approaches the feeding means, and moves backward by grasping the tip of the belt loop material fed by the feeding means. As a result, a belt loop material having a predetermined length is stretched between the feeding means and the drawing means. Next, the looped belt loop material is cut by the cutting means in the vicinity of the feeding port of the feeding means, and the pair of forks of the loop supply means approaches the cut belt loop material (belt loop) and sandwiches both ends. At the same time, it is folded back and supplied onto the sewing machine bed of the sewing machine body.

  FIG. 8 shows the feeding means 7 of the conventional belt loop supply apparatus as described above. In FIG. 8, the belt loop material T (two-dot chain line) is fed by a feeding means 7 having a feeding roller 7a, and is sent to the cutting blades 4a and 4b through a predetermined path. In the middle of the path, a detection lever 1 capable of rotating and swinging around a fulcrum 2 is provided, and a lower end portion of the detection lever 1 is in contact with the surface of the belt loop material T. When the detection lever 1 swings according to the thickness of the belt loop material T passing therethrough, the rotation angle is transmitted to the analog meter, and the thickness of the belt loop material is known. Since the seam portion is thicker than the other portions, the seam portion can be determined by storing data relating to the thickness of the belt loop material in advance in a control circuit or the like.

By the way, the belt loop material used in the belt loop supply apparatus as described above is formed in a long belt shape by joining cloths together. Since the seam portion cannot be used as a belt loop for sewing and needs to be discharged, a detecting means for detecting the seam portion is provided for this purpose.
JP 2001-46771 A

  Here, since the belt loop material is formed in a long belt shape, for example, it is often used by being placed in a box or the like in a wound or folded state and placed on the floor under the sewing machine. For this reason, the tip portion is normally inserted into the belt loop supply device and sequentially fed out.For example, even if the belt loop supply device performs a feeding operation by being wound or caught on the lower part of the sewing machine, A stepping motor used as a driving source for the feeding means will step out, and a belt loop of a prescribed length (a prescribed amount) will not be fed, resulting in a feeding failure. As a result, there has been a problem that a sewing failure of the belt loop occurs.

  That is, in the belt loop supply apparatus disclosed in Patent Document 1, the detection means for detecting the joint portion of the belt loop material is specialized for detecting the thickness of the belt loop material, and driving the feeding means. Since the control means for controlling the belt is open control, it is impossible to detect the amount of belt loop material actually sent (or the amount of rotation by which the stepping motor used as the drive source of the feeding means actually operates). It was. For this reason, for example, it is impossible to detect feeding failure due to motor feeding or catching, motor abnormality such as lock, exhaustion of the belt loop, etc., and there is a problem that poor sewing of the belt loop occurs. there were.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a belt loop supply device which prevents a sewing failure by determining whether a belt loop is fed out or exhausted.

In order to solve the above-mentioned problem, the invention according to claim 1 of the present invention provides:
A belt loop supply device that supplies a belt loop cut to a predetermined length to a sewing machine that sews a belt loop to a sewing product,
A feeding means for feeding a belt loop material formed by joining fabrics along a predetermined path using a stepping motor as a drive source;
Detecting means for detecting an actual rotation amount of the stepping motor;
Control means for controlling the drive of the feeding means,
The control means includes
Deviation data comprising a plurality of deviation areas divided by a plurality of threshold values is stored in advance with respect to the deviation between the command rotation amount to the stepping motor and the actual rotation amount of the stepping motor detected by the detection means. Storage means,
In which deviation area of the deviation data stored in the storage means the deviation between the command rotation amount to the stepping motor and the actual rotation amount of the stepping motor detected by the detection means is present. Judgment means for judging at least one of feeding failure due to seam or catching of the belt loop material or exhaustion of the belt loop material by judging,
A feeding control means for stopping the driving of the stepping motor based on the judgment result of the judgment means and executing a feeding control process for performing notification corresponding to the judgment result of the judgment means ;
The determination means determines that the belt loop material is used up when it is determined that the deviation is in a first deviation region including 0, and the deviation is larger than the first deviation region. The belt loop material joint when it is determined that it is in the normal range and is determined to be in the third deviation region having a larger deviation than the second deviation region. determined to be, when it is determined that the third fourth deviation region deviation is greater than the deviation area of the characterized that you determined to be feeding failure of the belt loop material.

  According to a second aspect of the present invention, in the first aspect of the present invention, at least a part of the boundary between the deviation regions is set at a predetermined interval.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, there is provided an urging means for applying a load to the feeding of the belt loop material by the feeding means.

  According to the first aspect of the present invention, the actual rotation amount of the stepping motor provided as the drive source of the feeding means can be detected by the detecting means. Further, based on the detection result, the deviation between the command rotation amount to the stepping motor and the actual rotation amount of the stepping motor detected by the detection means is within any deviation region of the deviation data stored in the storage means. By determining whether the belt loop material is present or not, it is possible to determine at least one of the belt loop material used up due to the seam or catch of the belt loop material, or the belt loop material used up due to exhaustion. Further, the feeding control unit can execute a feeding control process for stopping the driving of the stepping motor based on the determination result of the determining unit. As a result, it is possible to prevent the occurrence of poor sewing of the belt loop, and as a result, it is possible to improve the reliability of the belt loop supply device. At that time, the feeding control means performs notification corresponding to the judgment result of the judging means, for example, via the display means, so that the operator stops driving the stepping motor and stops feeding the belt loop material. It is possible to easily know the cause of the problem and to respond quickly.

  According to the invention described in claim 2, in addition to obtaining the same effect as that of the invention described in claim 1, in particular, at least a part of the boundary of each deviation region is set at a predetermined interval from each other. As a result, it is possible to provide a blank area for determination by the determination means, and to avoid deterministic control over a range that does not relate to either before or after the threshold value. That is, for example, there may be a case where it cannot be determined definitively which deviation region corresponds to a certain range before and after the threshold. For such a range, for example, the deviation between the command rotation amount to the stepping motor and the actual rotation amount of the stepping motor detected by the detection means is determined based on a single threshold value without any interval, and is determined as either one. If so, there may be a case where it is not necessary to stop, it is stopped, it is necessary to stop, but it is not stopped, or the cause of the stop is not correctly determined. Therefore, by providing a blank area for judgment by the judging means, the frequency at which the stepping motor as the driving source of the feeding means is stopped by the feeding control means when the deterministic determination of which deviation area cannot be made is reduced. Can do. As a result, it is possible to improve the productivity by suppressing the frequency of stopping the feeding operation while preventing the belt loop sewing failure.

  According to the invention described in claim 3, in addition to obtaining the same effect as that of the invention described in claim 1 or 2, in particular, by providing an urging means, it is possible to detect and detect the command rotation amount to the stepping motor. The deviation from the actual rotation amount of the stepping motor detected by the means can be increased. Therefore, it is possible to more easily and surely determine at least one of a feeding failure due to the belt loop material seam or catching, or the presence or absence of the belt loop material due to exhaustion.

The best mode for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 is a plan view showing a belt loop sewing machine 10 provided with a belt loop supply device according to the present invention. A belt loop sewing machine 10 shown in FIG. 1 includes a sewing machine main body 12 which is a two-needle cycle sewing machine, a belt loop supply device 13 arranged on the right side of the sewing machine main body 12, and the like. It is arranged.

(Overall configuration of belt loop supply device)
2 is a side view showing a schematic configuration of the belt loop supply device 13 shown in FIG. 1, and FIG. 3 is a view in which a tape material T is passed between the feeding means 37 and the drawing means 38 provided in the belt loop supply device 13. FIG. 4 is a block diagram showing a control circuit 50 that controls the operation of the belt loop supply device 13.
As shown in FIGS. 1 to 4, the belt loop supply device 13 is a belt loop material (hereinafter referred to as a tape material T) formed by joining a fabric to a sewing machine body 12 for sewing a belt loop to a sewing product. Is fed into a belt loop by cutting it into a predetermined length. The feeding means 37 feeds the tape material T along a predetermined path using the stepping motor 44 as a driving source, and the feeding means 37. The biasing means 60 for applying a load to the feeding of the tape material T, the rotary encoder 65 as a detecting means for detecting the actual rotation amount of the stepping motor 44, and the feeding means 37 can be brought into contact with and separated from, and approach the tape material T. A pull-out means 38 that pulls out the tape material T to the end of a predetermined path by holding the front end of the tape Provided, cutting means 34 for cutting the tape material T to a predetermined length, and provided near the terminal end of the predetermined path, holding the tape material T drawn by the drawing means 38 and being cut by the cutting means 34 A loop supply means 35 for supplying a belt loop formed by bending both ends of the tape material T to the sewing machine body 12, a control section 51 as a control means for controlling driving of the feeding means 37, and various setting operations and displays. An operation panel 56 and the like are provided.

(Feeding means)
As shown in FIG. 2, the feeding means 37 includes a feeding roller 40, a stepping motor 44, a tape delivery table 41, and the like.
The feeding roller 40 is a gear having feed teeth formed on the entire outer periphery thereof, and is attached to one end of a rotating shaft 42 disposed substantially horizontally so as to be orthogonal to the feeding direction of the tape material T. . The stepping motor 44 is provided on the lower right side of the feeding roller 40 in FIG. 2, and a driving toothed belt pulley 45 is fitted to the output shaft 44a. A driven toothed belt pulley 43 is fitted to the other end of the rotating shaft 42, and a timing belt 46 is stretched between the driven toothed belt pulley 43 and the driving toothed belt pulley 45. The rotation of the stepping motor 44 is transmitted to the feeding roller 40. The stepping motor 44 is driven at a predetermined timing by a control unit 51 (see FIG. 4) described later.

  The tape delivery table 41 has a delivery surface (not shown) that is flat in an oblique direction. A flat horizontal surface (not shown) continuous to the delivery surface is formed below the feeding roller 40, and a path (predetermined route) through which the tape material T passes is formed by the delivery surface and the horizontal surface. . Then, the tape T inserted through the insertion port indicated by the arrow A and passed over the delivery surface comes into contact with the delivery roller 40 below the delivery roller 40, and passes through the horizontal plane by the rotation of the delivery roller 40. It is extended from the outlet of arrow B by the length.

(Biasing means)
The biasing means 60 includes a joint detection auxiliary lever 61, and applies a predetermined load to the tape material T via the joint detection auxiliary lever 61.
Specifically, the seam detection auxiliary lever 61 has, for example, a U-shaped tip 61b as shown in FIG. 2 and is formed in a bent shape at two locations, and is a bent portion that is one of the bent portions. The part 61a is attached to the support plate 62. Further, the joint detection auxiliary lever 61 is rotatable about the bent portion 61a as a fulcrum, and is urged counterclockwise in FIG. 2 by the action of a spring member (not shown). When the tape material T passes through the tip 61b of the joint detection auxiliary lever 61, the tape material T is always pressed on the delivery surface of the tape delivery table 41, and a load is applied to the feeding of the tape material T, that is, A feeding resistance is provided.

  The seam detection auxiliary lever 61 does not rotate so much when a seamless part (normal part) of the tape material T passes, so the load applied to the tape material T is small, but the seam is thicker than the normal part. When the portion (step portion) passes, the tip 61b is pushed up, so that a relatively large load is applied to the tape material T. That is, when a portion where the thickness of the tape material T is thick, such as a joint portion, passes through the distal end portion 61 b of the joint detection auxiliary lever 61, it is more than when a normal portion of the tape material T passes through the joint detection auxiliary lever 61. Also, the feeding resistance is increased.

(Detection means)
The rotary encoder 65 as a detecting means is provided coaxially with the output shaft 44a of the stepping motor 44, and the amount of actual rotation of the output shaft 44a of the stepping motor 44, that is, the actual rotation amount of the stepping motor 44 is rotated. Detection is based on the number of pulses (rotation step) according to the amount. Here, for ease of explanation, when the stepping motor 44 rotates by the number of driving pulses, the number of driving pulses of the stepping motor 44 and the number of output pulses output from the rotary encoder 65 are 1: 1. It is assumed that they are configured so as to correspond to each other.
The rotary encoder 65 outputs an output signal corresponding to the actual rotation amount of the stepping motor 44 to the control unit 51 in accordance with the rotation of the stepping motor 44.

  Here, as described above, when the tape material T passes through the tip end portion 61 b of the joint detection auxiliary lever 61, a feeding resistance is given to the feeding of the tape material T. Therefore, the number of drive pulses output from the control unit 51, which will be described later, to the stepping motor 44 serving as the rotational drive source of the feed roller 40 that feeds the tape material T, that is, the command rotation amount, and the stepping motor 44 actually rotates There will be a deviation at the moment from the measured amount (actual rotation amount). The deviation between the command rotation amount to the stepping motor 44 and the actual rotation amount is detected by the rotary encoder 65 from, for example, the number of drive pulses (command rotation amount) output from the control unit 51 described later to the stepping motor 44. The deviation amount is defined by subtracting the actual rotation amount of the stepping motor 44, that is, the number of output pulses output from the rotary encoder 65 to the control unit 51.

  Further, when the tape material T is fed out, the load applied to the stepping motor 44 by the tape material T biased by the joint detection auxiliary lever 61 changes, whereby the number of drive pulses (command rotation amount) of the stepping motor 44 is changed. ) And the number of output pulses of the rotary encoder 65 (actual rotation amount of the stepping motor 44) changes. Specifically, when the joint portion passes the tip end portion 61b of the joint detection auxiliary lever 61, the number of drive pulses (command rotation amount) of the stepping motor 44 and the number of output pulses of the rotary encoder 65 (actual amount of the stepping motor 44). A larger deviation than when the normal part passes. A change in deviation between the number of drive pulses and the number of output pulses is output to the control unit 51, and the control unit 51 calculates the deviation based on the change.

(Drawer means)
The draw-out means 38 is for holding and pulling out the tape material T drawn in the direction B in FIG. 2 by the above-mentioned feed means 37, and includes a grip arm 101 composed of a fixed arm 101a and a movable arm 101b, and a grip arm. A drive rod 105 that holds 101 at the tip portion and a grip arm motor 52 (see FIG. 4) that reciprocates the drive rod 105 are provided.
A grip lower portion 103 is formed slightly bent downward so that the tape material T can be easily put on the front end of the fixed arm 101a, while the front end of the movable arm 101b is bent in the vertical direction so that the tape material T can be easily caught. A gripping upper portion 107 having a sharp end is formed. The movable arm 101b swings up and down as the output rod 110a of the air cylinder 110 reciprocates, so that the grip lower portion 103 and the grip upper portion 107 can contact and separate. The air cylinder 110 is driven via a gripping arm solenoid valve 111 (see FIG. 4) controlled by the control unit 51.

  The grip arm 101 is fixed to the tip of the drive rod 105 below the attachment portion 112 via the attachment portion 112. The drive rod 105 is driven to reciprocate in the left-right direction in FIG. 2 as the gripping arm motor 52 formed of a stepping motor rotates. Under the control of the control unit 51, the gripping arm 101 approaches the feeding means 37 at a predetermined timing (state shown in FIG. 2), and grips the tape material T that has been fed out at the gripping position in FIG. The upper part 107 and the lower part 103 are sandwiched and grasped. Then, the vehicle moves back to the retracted position shown in FIG. 3 (leftward in FIG. 2, upper in FIG. 3). By the operation of the gripping arm 101, as shown in FIG. 3, the tape material T is in a state where a predetermined length is passed between the feeding means 37 and the drawing means 38.

(Cutting means)
As shown in FIG. 2, the cutting means 34 includes a cutting drive cylinder 71, a movable blade 72, a fixed blade 73, and the like. The cutting drive cylinder 71, which is an air cylinder, drives the movable blade 72 in the vertical direction via the drive shaft 71a, and is driven at a predetermined timing by the cutting electromagnetic valve 53 (see FIG. 4). It has become.
The fixed blade 73 is provided immediately below the feeding path of the tape T and substantially opposite to the movable blade 72. The movable blade 72 and the fixed blade 73 allow the fixed blade 73 and the drawer 37 to be pulled out as described above. The tape material T in a state of being passed between the means 38 is cut at the cutting position shown in FIG.

(Loop supply means)
The loop supply means 35 includes forks 200a and 200b that sandwich the tape material T at the tip thereof as in a conventionally known belt loop supply device, and the forks 200a and 200b are driven using a motor mechanism or a cam mechanism (not shown). However, the tape material T (belt loop) cut to a predetermined length is supplied to the sewing machine body 12.
Specifically, as shown in FIG. 3, the forks 200 a and 200 b are passed between the feeding means 37 and the drawing means 38 and approach from behind the tape material T (belt loop) cut by the cutting means 34. The sewn product S is advanced as it is, and is supplied to a predetermined position of the sewing product S placed on the sewing machine bed 5 of the sewing machine body 12. After feeding, it moves backward and moves forward again to pinch the next belt loop. In addition, the track | orbit at the time of the retreat of the forks 200a, 200b is lower than that at the time of supply so as not to disturb the work by the feeding means 37, the drawing means 38, and the cutting means 34.

  The loop supply means 35 includes a supply motor 54 (see FIG. 4) for driving the motor mechanism and an air cylinder (not shown) for driving the cam mechanism. The fork 200a, 200b is driven along a predetermined trajectory. The supply motor 54 and the supply electromagnetic valve 55 (see FIG. 4) for driving the air cylinder are appropriately controlled by the control unit 51.

(Control circuit)
Next, the configuration of the control circuit 50 in the present embodiment will be described based on FIG.
As shown in FIG. 4, the control circuit 50 includes a control unit 51. The control unit 51 includes a sewing start switch 510 for starting a sewing operation, a stepping motor 44, a gripping arm electromagnetic valve 111, and a gripping arm motor. 52, a cutting electromagnetic valve 53, a supply motor 54, a supply electromagnetic valve 55, a rotary encoder 65, and the like are connected.

  The control unit 51 includes a CPU (Central Processing Unit) 511, a ROM (Read Only Memory) 512, a RAM (Random Access Memory) 513, an I / O interface (not shown), and the like, and a control program and control data stored in the ROM 513. The operation of each motor and each electromagnetic valve is controlled according to the above.

Specifically, in the ROM 513 in the present embodiment, for example, as shown in FIG. 4, a deviation between the command rotation amount to the stepping motor 44 by the CPU 511 and the actual rotation amount of the stepping motor 44 detected by the rotary encoder 65 is stored. With respect to D, a plurality of deviation regions a _{1 to} a ₄ divided by a plurality of threshold values (for example, D _{0 to} D ₄ : D ₀ <D ₁ <D ₂ <D ₃ <D ₄ ) shown in FIG. 5 are provided. Deviation data 513a (see FIG. 5) is stored in advance, and the ROM 513 functions as the storage means of the present invention.

More specifically, for example, as shown in FIG. 5, the deviation data 513a includes a deviation area a ₁ (D ≦ D ₀ ), a deviation area a ₂ (D ₁ ≦ D ≦ D ₂ ), and a deviation area a ₃ ( D ₃ ≦ D ≦ D ₄ ), deviation area a ₄ (D ₄ ≦ D), blank area b ₁ (D ₀ <D <D ₁ ), blank area b ₂ (D ₂ <D <D ₃ ) It is prepared for.

The deviation area a ₁ is a state in which there is no deviation between the command rotation amount output from the control unit 51 to the stepping motor 44 and the actual rotation amount, that is, the deviation D is 0 (D = 0) or almost 0 (D≈ 0), and the load applied to the stepping motor 44 by the tape material T corresponds to the no-load state. The deviation area a _1, for example, by running out or the like, the tape T to the leading end portion 61b of the seam detection assisting lever 61 corresponds to a state of not being supplied (state without the loop).

Deviation area a ₂ is, for example, the distal end 61b of the seam detection assisting lever 61 have tape T is fed, and, to pass through the tip portion 61b corresponds to the case of the normal part of the tape T ing. That is, the deviation amount corresponding to the range of the deviation region a ₂ has a normal range of the deviation D at the time of paying out a tape T.

The deviation area a ₃ corresponds to the case where the deviation D is larger than the deviation areas a ₁ and a _2. For example, the tape material T is supplied to the distal end portion 61 b of the joint detection auxiliary lever 61, and the deviation area a ₃ This corresponds to the case where the joint portion of the tape material T passes through the tip portion 61b.

Deviation region a ₄ corresponds to when the deviation D is greater than when the seam portion of the tape T passes the leading edge 61b of the seam detection assisting lever 61, for example, prior to being fed into the routes and route In this case, the tape material T is not supplied due to being caught or entangled in any part, or when the stepping motor 44 is locked or stepped out.

The blank area b ₁ separates the boundary between the deviation area a ₁ and the deviation area a ₂ with a predetermined interval, and the blank area b ₂ defines the boundary between the deviation area a ₂ and the deviation area a _3. Are spaced apart from each other. That is, in this embodiment, blank areas b ₁ and b ₂ are provided before and after the deviation area a ₂ that is a normal range of the deviation D, and the deviation area a ₂ and the adjacent deviation areas a ₁ and deviations are provided. the boundary between the region a ₃ is set at a predetermined distance from each other.

Each of the threshold values D _{0 to} D ₄ can be set as desired so as to correspond to each of the deviation regions a _{1 to} a ₄ on the basis of an actual measurement value of the deviation D obtained in advance by experiments.

  Furthermore, for example, as shown in FIG. 4, the ROM 513 in the present embodiment stores a determination program 513b based on interrupt processing executed at a predetermined cycle timing and a payout control processing program 513c.

The determination program 513b is configured such that a deviation D between a command rotation amount from the control unit 51 (CPU 511) to the stepping motor 44 and an actual rotation amount of the stepping motor 44 detected by the rotary encoder 65 is deviation data 513a (stored in the ROM 513). 5), it is possible for the CPU 511 to determine which deviation region is present, and based on the determination result, the CPU 511 has a feeding failure due to the seam or hooking of the tape material T (belt loop material). And the presence or absence of the tape material T due to exhaustion or the like can be determined, and functions as a determination unit of the present invention together with the CPU 511.
Specifically, when the CPU 511 that executes the determination program 513b determines that the deviation D is within the range of the deviation area a ₁ (D ≦ D ₀ ), for example, there is no loop, that is, the tape T Judged to be exhausted. Further, when it is determined that the deviation D is within the range of the deviation area a ₂ (D ₁ ≦ D ≦ D ₂ ), it is determined to be a normal range. Further, when it is determined that the deviation D is within the range of the deviation area a ₃ (D ₃ ≦ D ≦ D ₄ ), the joint portion (step portion) of the tape material T is connected to the tip 61b of the joint detection auxiliary lever 61. If the deviation D falls within the range of the deviation area a ₄ (D ₄ ≦ D) beyond that, it is determined that a feeding failure of the tape material T has occurred.
The CPU 511 functions as a determination unit of the present invention by executing the determination program 513b.

Based on the determination result of the CPU 511 functioning as the determination means, the payout control processing program 513c executes a notification program that performs notification corresponding to the determination result of the supply control process and determination means in which the CPU 511 stops the driving of the stepping motor 44. This functions together with the CPU 511 as a feeding control means of the present invention.
Specifically, for example, when the CPU 511 functioning as a determination unit by executing the determination program 513b determines that the tape material T has been used up or a supply failure has occurred, the supply control processing program 513c is executed. The CPU 511 to execute the process stops the motors 44, 52, 54 and the solenoid valves 111, 53, 55 to stop the entire belt loop supply device 13, or is provided on the operation panel 56. In addition, control is performed to execute a feeding control process for displaying an error corresponding to a determination result by displaying an error on a display unit (display unit) (not shown) or generating a warning sound.
The CPU 511 functions as a feeding control unit of the present invention by executing the feeding control processing program 513a.

Then, the control unit 51, the CPU511 functioning as the determining means, the deviation D is in the range of the deviation region _{a 3,} seam portion of the tape T (step portion) of the distal end portion 61b of the seam detection assisting lever 61 When it is determined that the passage has passed, the operations of the feeding means 37, the drawing means 38, and the cutting means 34 are controlled at a predetermined timing together with the feeding operation on the loop feeding means 35 side, so that the seamless portion is supplied as a belt loop. However, control is performed so as to exclude the portion including the seam. At that time, by storing the path length from the tip 61b to the cutting position in the path in the ROM 513 in advance, for example, the portion including the seam is fed by the length of the path from the tip 61b to the cutting position. When the joint portion of T exceeds the cutting position, processing for excluding the portion including the joint is immediately performed.

(Description of operation of embodiment)
Next, the operation of the belt loop supply device 13 having the above configuration will be described.
FIG. 6 is a flowchart showing the basic operation of the belt loop supply device 13 having the above-described configuration. In the belt loop supply device 13, the feeding means 37, the drawing means 38, and the cutting means 34 performed under the control of the control unit 51. The control process is shown. FIG. 7 is a flowchart showing an interrupt processing operation executed in parallel during the basic operation of the belt loop supply device 13 shown in FIG. 6. In the belt loop supply device 13, the control of the control unit 51 is performed. The judgment processing and feeding control processing performed below are shown.

First, as shown in FIG. 6, when the power of the belt loop supply device 13 is turned on, the CPU 511 performs initialization processing such as a deviation D 1 , a step counter B, and step position pointers C described later. If the belt loop is not in the supply path when the power is turned on, the tip of the tape material T is manually positioned below the feeding roller 40 before the power is turned on. As a result, the control unit 51 automatically rotates the stepping motor 44 when the power is turned on to place the tip of the tape material T between the movable blade 72 and the fixed blade 73 and then energize the cutting solenoid valve 53. Thus, the tip of the loop material T is positioned (step S1). Next, when the ON operation of the sewing start switch 510 is detected and the belt loop supply operation is started (step S2; YES), the CPU 511 drives the feeding roller 40 by outputting a predetermined number of drive pulses to the stepping motor 44. (Step S3).

  Then, as shown by the arrow B in FIG. 2, when the leading end of the tape material T is fed out from the feed outlet, the CPU 511 drives the grip arm motor 52 to grip the grip arm 101 (advance position: see FIG. 3). ) (Step S4). Then, the CPU 511 drives the gripping arm solenoid valve 111 to grip the tip (loop tip) of the tape T (step S5), and drives the gripping arm motor 52 while continuing to drive the feeding roller 40. The gripping arm 101 is retracted to the belt loop forming position (retracted position: see FIG. 3) (step S6).

  Next, the CPU 511 drives the cutting device by driving the cutting electromagnetic valve 53 (step S7), and supplies the belt loop to the sewing machine body 12 by driving the supply motor 54 and the supply electromagnetic valve 55. The control is executed (step S8), and after the sewing of the belt loop by the sewing machine body 12 is completed, it waits again for the sewing product S to be set on the sewing machine and the sewing start switch 510 to be turned on (step S2).

  On the other hand, when the initialization process is completed in step S1, the CPU 511 performs an interrupt process for belt loop supply shown in FIG. 7 in parallel with the sewing process from step S2 to step S8 described above.

When the sewing start switch 510 is turned ON and the stepping motor 44 is driven, the CPU 511 drives the rotary encoder every predetermined M pulses (for example, M = 1) (step S101; Yes). By counting the number of pulses output from 65, the actual amount of rotation of the stepping motor 44 at that moment is detected, and the number of drive pulses output to the stepping motor 44 so far and the actual rotation detected by the rotary encoder 65 are detected. From the quantity, a process for obtaining the deviation D is executed (step S102). Next, the CPU 511 executes the determination program 513b, so that the deviation D is within the normal range in the deviation data 513a stored in the ROM 513 in advance, that is, within the deviation area a ₂ (D ₁ ≦ D ≦ D ₂ ). It is determined whether or not there is (step S103).

If it is determined in step S103 that the deviation D is not within the normal range (step S103; No), the CPU 511 determines whether the deviation D falls within the deviation area a ₃ (D ₃ ≦ D ≦ D ₄ ), That is, it is determined whether or not the joint portion (step portion) of the tape material T is passing through the distal end portion 61b of the joint detection auxiliary lever 61 (step S104).
In step S104, if the difference D is determined to fall within the deviation area _{a 3} (step S104; Yes), CPU 511 adds 1 to the stepped portion counter B for counting the number of stepped portion (step S105), A step portion pointer CB indicating the subsequent sending amount of the step portion detected here is set, and the current sending amount 0 is set to the pointer CB (step S106).

On the other hand, in step S103, if the difference D is judged to be within the normal range _{a 2} (Step S103; Yes), CPU 511, the value of the step counter B is equal to or 1 or more (step S107 ). The value of the step counter B is counted down when the corresponding step defined by the step pointer CB is discharged out of the cutting position by the movable blade 72 and the fixed blade 73 and cut as described later. The Therefore, the value of the step counter B being 1 or more indicates that there is at least one step in the feeding path of the tape material T, and the CPU 511 determines that the tape material T is determined in step S107. The presence or absence of a stepped portion in the transmission route is determined.

  If the CPU 511 determines in step S107 that there is no step portion in the tape material T delivery path (step S107; No), the CPU 511 returns to step S101 and the stepping motor 44 further M pulses than the previous determination. It is determined whether or not it has been driven.

  On the other hand, if it is determined in step S107 that B ≧ 1, that is, there is a step portion in the tape material T delivery path (step S107; Yes), the CPU 511 determines that the step portion pointers C1 to CB currently set. M (pulse) is added to each of them (step S108), and the value of the step pointer C1 corresponding to the leading step is changed from the position where the step is detected to the cutting position by the movable blade 72 and the fixed blade 73. It is determined whether or not the driving pulse L of the stepping motor 44 to be sent has reached or exceeded (step S109). That is, by the processing of step S109, the CPU 511 determines whether or not the stepped part found in step S104 has been sent to a position beyond the cutting position.

If the CPU 511 determines in step S109 that the value of the step pointer C1 is not greater than or equal to L (step S109; No), the CPU 511 returns to step S101 and the stepping motor 44 further M pulses than the previous determination. It is determined whether or not it has been driven.
On the other hand, if it is determined in step S109 that the value of the step pointer C1 is equal to or greater than L (step S109; Yes), the CPU 511 prevents the step pointer C1 from being supplied to the sewing machine at the corresponding step. In addition, the driving of the stepping motor 44 is stopped and the cutting electromagnetic valve 53 is driven to drive the cutting device to execute the process of removing the stepped portion (seam) portion. A predetermined error code notifying that the step has been detected is displayed on the display means) (step S110). Next, since the tape material T is cut by the interruption process, the process up to that point in the basic operation of the belt loop supply device 13 shown in FIG. 6 is interrupted, and a new belt loop supply operation is executed from the process of step S3. Command is output (step S111).

  Further, the CPU 511 performs countdown (B = B−1) of the step counter B in order to correspond to the number of steps reduced by one by the cutting process for subsequent processing, and for each step. Then, in order to attach the step pointers in the order with respect to the cutting position, a step pointer decrement process is performed for each step (step S112), and the process returns to step S101 again.

On the other hand, in step S104, if the difference D is determined to not within the deviation area _{a 3} (step S104; No), CPU 511 determines whether the deviation D is within the deviation area _a 1 _(D ≦ D ₀₎ That is, it is determined whether or not the loop is not present (the tape material T is absent due to exhaustion of the belt loop or the like) (step S113).

In step S113, if the difference D is determined to be in error region _{a 1} (step S113; Yes), CPU 511 causes the display unit (not shown) provided on the operation panel 56, for example, fruit use tape member T A feeding control process is performed to display an error corresponding to the determined determination result by displaying an error message indicating that the recording has been performed or issuing a warning to prompt the user to replenish a new tape material T (step S114). Further, the driving of the stepping motor 44 and the motors 52 and 54 is stopped, and the electromagnetic valves 111, 53, and 55 are controlled to stop the entire apparatus of the belt loop supply device 13 (step S115). .

On the other hand, in step S113, if the difference D is determined not on the deviation area _{a 1} (step S113; No), CPU 511 determines whether the deviation D is the deviation area _{a 4 (D} 4 ≦ _D) in That is, for example, when the tape material T is not supplied due to being caught or entangled in any part of the path or before being supplied to the path, or when the stepping motor 44 is locked or stepped out, etc. It is determined whether or not it is in a feeding failure state that cannot be fed out (step S116).

In step S116, if the difference D is determined to be within a deviation area _{a 4} (Step S116; Yes), CPU 511 causes the display unit (not shown) of the operation panel 56, for example, tape T is caught in the path A feeding control process for performing a notification corresponding to the determined determination result (step S117); A process of stopping the driving of the stepping motor 44 and controlling the electromagnetic valves 111, 53, and 55 to stop the entire apparatus is executed (step S115).

On the other hand, in step S116, if the difference D is determined to not within the deviation area _{a 4} (Step S116; No), CPU 511 is the number of times n of the deviation D is determined not to correspond to any of the deviation area Increment, that is, count up (n = n + 1) (step S118), and determine whether n after counting up in step S118 is a predetermined number (for example, 3 in this embodiment) or more. (Step S119).

  In step S119, when n counted up is less than a predetermined number (for example, 3 in the present embodiment) (step S119; No), the process returns to step S101, and the above-described processing is repeatedly executed. On the other hand, if n counted up is greater than or equal to the predetermined number in step S119 (step S119; Yes), the CPU 511 displays an error message indicating that an unknown error has occurred, for example, on a display unit (not shown) of the operation panel 56. Then, a notification corresponding to the determined determination result is performed (step S120), and further, a process of stopping the driving of the stepping motor 44 and controlling each electromagnetic valve 111, 53, 55 to stop the entire apparatus is executed. (Step S115).

(Effect of embodiment)
According to the belt loop supply device 13 according to this embodiment described above, the rotary encoder 65 can detect the actual rotation amount of the stepping motor 44 provided as a drive source of the feeding means 37. Based on the detection result, the CPU 511 that executes the determination program 513 b stores the deviation D between the command rotation amount to the stepping motor 44 and the actual rotation amount of the stepping motor 44 detected by the rotary encoder 65 in the ROM 513. By determining which deviation area is included in the deviation data 513a, whether there is a belt loop material due to a feeding failure due to a seam portion or catch of the tape material T (belt loop material) or exhaustion Can be judged. Further, the CPU 511 that executes the feeding control processing program 513c stops the driving of the stepping motor 44 based on the determination result of the CPU 511 functioning as the determination unit, and performs a feeding control process for providing notification corresponding to the determination result of the determination unit. Can be executed. As a result, it is possible to prevent the occurrence of poor sewing of the belt loop, and as a result, the reliability of the belt loop supply device 13 can be improved. At that time, a display unit (display unit) (not shown) of the operation panel 56 performs a display corresponding to the determination result of the determination unit, so that the operator stops driving the stepping motor 44 and stops feeding the belt loop material. It is possible to easily know the cause of the problem and to respond quickly.

Further, since at least a part of the boundary of each deviation area is set at a predetermined interval, a blank area for judgment by the judgment means can be provided, and before and after the threshold, for example, the deviation area a It is possible to avoid deterministic control over a range that does not have any of the boundaries between ₁ and a ₂ or the deviation areas a ₂ and a ₃ . That is, for example, there may be a case where it cannot be determined definitively which deviation region corresponds to a certain range before and after the threshold. For such a range, for example, the deviation between the command rotation amount to the stepping motor 44 and the actual rotation amount of the stepping motor 44 detected by the rotary encoder 65 is determined based on a single threshold value without any interval. If it is decided on the other hand, there may be a case where it is not necessary to stop, but it is stopped, or it is necessary to stop but not stopped. Accordingly, by providing a blank area for judgment by the judging means, when it is impossible to make a definitive judgment as to which deviation area, the CPU 511 functioning as the feeding control means stops the stepping motor 44 serving as a driving source for the feeding means. The frequency can be reduced. As a result, it is possible to improve the productivity by suppressing the frequency of stopping the feeding operation while preventing the belt loop sewing failure.

  Further, by providing the urging means 60, it is possible to increase the deviation between the command rotation amount to the stepping motor 44 and the actual rotation amount of the stepping motor 44 detected by the rotary encoder 65. Therefore, it is possible to more easily and reliably determine the presence or absence of the tape material T due to the joint portion of the tape material T, the feeding failure due to catching, or the exhaustion.

  In the present embodiment, the conventional belt loop supply device has a simple configuration in which a rotary encoder 65 is physically added, and a determination program 513b and a feeding control processing program 513c are provided. The joint portion (step portion) of the tape material T, feeding failure, presence / absence of the tape material T and an unknown error can be detected, and the control unit 51 performs feeding control processing based on the detection result, so that the belt loop Occurrence of poor sewing can be effectively prevented.

  Further, for example, an analog meter or a thickness transmission means (for example, a gear) of the tape material T to the analog meter, which is provided as a seam detecting unit in the conventional belt loop supply device, is not necessary. Since the configuration of the supply device 13 can be simplified, the reliability of the belt loop supply device 13 can be improved.

(Other)
In the above embodiment, the rotary encoder 65 is arranged coaxially with the output shaft 44a of the stepping motor 44. However, for example, the rotary encoder 65 may be coaxial with the feeding roller 40 or on the driving timing belt 46. You may install via the pulley for rotary encoders. Even if comprised in this way, the effect similar to the said embodiment can be acquired.

  In the above embodiment, the seam detection auxiliary lever 61 is arranged in order to increase the deviation between the driving pulse of the stepping motor 44 and the output pulse of the rotary encoder 65. However, for example, a roller member is arranged to reduce the load. Even if it gives, the same effect can be acquired, or the same effect can be acquired also as composition which bends a feeding path and gives load.

  Moreover, the front-end | tip part 61b of the joint detection auxiliary lever 61 is good also as a shape which has a plane part, for example. In this case, it is desirable that the flat portion is attached so as to be in contact with the tape material T to ensure a wide contact area between the tape material T and the tip portion 61b. By doing so, it is possible to secure a long time for generating the deviation, and it is easy to detect the deviation.

  Further, the seam detection auxiliary lever 61 is provided to facilitate detection of the seam portion of the tape material T and the like, but even if the seam detection auxiliary lever 61 is not provided, the feeding roller 40 has a normal feeding time. Since the load fluctuates when the tape material T passes through the joint portion (step portion) and when the tape material T is not present (that is, when the tape material T is used up), the drive pulse of the stepping motor 44 and the rotary encoder 65 Since the deviation from the output pulse changes, the same detection as in the above embodiment can be performed. That is, for example, a configuration in which the joint detection auxiliary lever 61 is omitted from the configuration of the above-described embodiment may be employed.

It is a top view which shows the belt loop sewing machine provided with the belt loop supply apparatus as an example of this invention. It is a side view which shows schematic structure of the belt loop supply apparatus shown in FIG. It is the schematic which shows the state by which the tape material was passed between the delivery means and the drawing-out means. It is a block diagram which shows the control circuit which performs operation | movement control of the belt loop supply apparatus of FIG. It is a conceptual diagram for demonstrating the concept of the deviation in this embodiment. It is a flowchart which shows the basic operation | movement of the belt loop supply apparatus in this embodiment. It is a flowchart which shows the interruption process operation | movement of the belt loop supply apparatus in this embodiment. It is a side view which shows the delivery means of the conventional belt loop supply apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Belt loop sewing machine 12 Sewing machine main body 13 Belt loop supply device 34 Cutting means 35 Loop supply means 37 Feeding means 38 Pulling means 44 Stepping motor 50 Control circuit 51 Control part (control means)
511 CPU (determination means, feeding control means)
512 RAM
513 ROM (storage means)
513a Deviation data 513b Judgment program (judgment means)
513c Feeding control processing program (feeding control means)
60 Biasing means 61 Joint detection lever 61a Bent part 61b Tip part 65 Rotary encoder (detection means)
T tape material (belt loop material)

Claims (3)

A belt loop cut to a predetermined length is supplied to the sewing machine that sews the belt loop to the sewing product.
A feeding means for feeding a belt loop material formed by joining fabrics along a predetermined path using a stepping motor as a drive source;
Detecting means for detecting an actual rotation amount of the stepping motor;
Control means for controlling the drive of the feeding means,
The control means includes
Deviation data comprising a plurality of deviation areas divided by a plurality of threshold values is stored in advance with respect to the deviation between the command rotation amount to the stepping motor and the actual rotation amount of the stepping motor detected by the detection means. Storage means,
In which deviation area of the deviation data stored in the storage means the deviation between the command rotation amount to the stepping motor and the actual rotation amount of the stepping motor detected by the detection means is present. Judgment means for judging at least one of feeding failure due to seam or catching of the belt loop material or exhaustion of the belt loop material by judging,
A feeding control means for stopping the driving of the stepping motor based on the judgment result of the judgment means and executing a feeding control process for performing notification corresponding to the judgment result of the judgment means ;
The determination means determines that the belt loop material is used up when it is determined that the deviation is in a first deviation region including 0, and the deviation is larger than the first deviation region. The belt loop material joint when it is determined that it is in the normal range and is determined to be in the third deviation region having a larger deviation than the second deviation region. determined to be the third when a deviation than the deviation area is determined to be in the large fourth deviation region, belt loops, wherein that you determined to be feeding failure of the belt loop material Feeding device.   The belt loop supply device according to claim 1, wherein at least a part of a boundary of each deviation region is set with a predetermined interval therebetween.   The belt loop supply apparatus according to claim 1, further comprising an urging unit that applies a load to the feeding of the belt loop material by the feeding unit.

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