JP2005237756A - Tension measuring device for sewn object - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tension measuring device for a sewn object, which has a small restriction of an installation place and can measure tension of even the sewn object underlying an operator's hand. <P>SOLUTION: Gas is blown out towards the sewn object 30 by a jet means 21 and state quantity showing the conditions of the gas, for example, tension is detected by a detecting means 22. The coating condition by the sewn object of a jet aperture 31 of the jet means 21 varies with the tension of the sewn object 30. If the coating condition varies, resistance to jet of the gas varies and the state quantity of the gas, which is blown out, varies. By detecting this state quantity, the tension of the sewn object can be calculated from the state quantity. Only the jet means can be installed near a position where the tension is measured, and another constituent at a distant position with a small restriction of the installation place. Moreover, in this organization, it is possible to measure the tension even if the operator attaches his hand to the sewn object. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an apparatus for measuring the tension of a sewn product sewn by a sewing apparatus.

  When a sewing product is sewn using a sewing machine, an operator places his / her hand on the sewing product to assist in feeding the sewing product in a stretched state suitable for sewing without wrinkles, for example. This auxiliary work is a work requiring skill because it is necessary to make the tension constant while feeling the tension of the sewing product by the reaction force transmitted from the sewing product to the hand. When the manner of attaching the hand to the sewn product changes, the tension of the sewn product changes, and the stretched state of the sewn product to be fed changes. In this case, the quality varies, for example, the finished dimensions of the sewn product change. In particular, when a sewn product having elasticity is sewn, such as when a lace or rubber string is sewn on the fabric, the influence on the sewn product due to the difference in tension of the sewn product becomes large. For these reasons, an apparatus that can measure the tension of a sewn product is desired.

  FIG. 12 is a skeleton diagram showing the stretchable tape feeder 1 as a conventional technique in a simplified manner. The stretchable tape feeder 1 is disclosed in Patent Document 1, and is configured to feed the stretchable tape 2 from a tape roll 4 by a driving roller 3 and supply it via a delivery guide 5. In this stretchable tape feeder 1, in order to supply the stretchable tape 2 in a state of being slackened between the driving roller 3 and the delivery guide 5, a detection arm 7 that can be rotationally displaced is provided, and its distal end is slackened. The detection arm 7 is rotated up and down by the amount of sag of the stretchable tape 2, and the rotational displacement amount of the detection arm 7 is detected by the sensor 8. The control means 9 is configured to control the drive rotational speed of the motor 10 that rotates the drive roller 3 in accordance with the vertical position of the detection arm 7. In this stretchable tape feeder 1, the amount of sag of the stretchable tape 2 is detected, but this configuration can also detect the tension of the stretchable tape 2 as the vertical position of the detection arm 7.

Japanese Patent No. 30612256

  In the conventional technique shown in Patent Document 1, it is possible to measure the tension of the stretchable tape, but it is originally a configuration for measuring the amount of sag, and even if diverted as it is, the tension of the sewing product can be accurately measured. Cannot be measured. In addition, the configuration is complicated, the installation place is greatly limited, it can not be installed near the sewing position where many other parts such as needles are provided, and the operator can measure the tension of the sewn product with hands. Absent. Thus, there is no device that can measure the tension of the sewn product that is being assisted by the operator with the hand in the vicinity of the sewing position, and such a measuring device is desired.

  An object of the present invention is to provide a sewn product tension measuring device that can measure the tension of a sewn product even if it is a sewn product with a hand attached by an operator with few restrictions on the installation location. .

The present invention includes a jetting means for jetting a gas supplied from a gas supply source toward a sewing product,
And a detecting means for detecting a state quantity of the gas ejected from the ejecting means.

  According to the present invention, the gas is ejected toward the sewing product by the ejecting means, and the state quantity indicating the state of the gas is detected by the detecting means. The ejection holes of the ejection means are in a state of being covered with the sewn product (hereinafter referred to as “covered state”), and the covered state changes depending on the tension of the sewn product. When the cover state changes, the resistance to the gas ejection changes, and the state quantity of the ejected gas changes. By detecting this state quantity, the tension of the sewing product can be obtained from the state quantity. Furthermore, it is only necessary to provide the ejection means in the vicinity of the position where the tension is to be measured, and other components can be provided at remote positions, and there are few restrictions on the installation location. Moreover, it is possible to measure the tension even when the operator puts his hand on the sewing product.

  The present invention is further characterized by further comprising a supply adjusting means that is interposed between the gas supply source and the ejection means and adjusts a state quantity of the gas supplied from the gas supply source to the ejection means.

  According to the invention, the state quantity of the gas supplied from the gas supply source to the ejection means is adjusted by the supply adjusting means. Accordingly, the state quantity of the gas detected by the detecting means can be adjusted so as to prevent the gas from changing depending on the supply state, and to change only by the tension of the sewing product.

The present invention is characterized in that the state quantity of gas includes pressure.
According to the present invention, the gas state quantity includes pressure. The pressure of the gas has a correlation with the tension of the sewing product, and the tension of the sewing product can be obtained by detecting this pressure.

Further, the present invention is a calculation means for calculating the tension of the sewing product from the gas state quantity detected by the detection means;
It further includes notification means for notifying information on the tension of the sewing product obtained by the calculation means.

  According to the present invention, the tension of the sewn product is calculated from the detected gas state quantity by the calculating means. Further, the information about the required tension of the sewing product is notified to the operator by the notification means. In this way, the tension of the sewing product can be automatically obtained, and information related to the tension can be notified to the operator.

  According to the present invention, the tension of the sewing product can be obtained from the detected state quantity of gas. Furthermore, it is only necessary to provide the ejection means in the vicinity of the position where the tension is to be measured, and other components can be provided at remote positions, and there are few restrictions on the installation location. Therefore, it is possible to measure the tension at a position where it is desired to grasp the tension of the sewn product, which is highly convenient. For example, the ejection means can be provided in the vicinity of the sewing position where the sewn product is sewn, and in this case, the tension of the sewn product immediately before the sewn product can be measured. Moreover, it is possible to measure the tension even when the operator puts his hand on the sewing product. For example, even when the operator attaches a hand and assists the feeding, the tension of the sewing product can be measured. As described above, it is possible to realize a measuring apparatus that is highly convenient and suitable for measuring the tension of the sewing product.

  Moreover, according to this invention, it can adjust so that the state quantity of the gas detected by a detection means may change only with the tension | tensile_strength of a sewing product. Therefore, the tension of the sewing product can be measured with high accuracy.

  Further, according to the present invention, the tension of the sewing product can be obtained by detecting the pressure. Moreover, the sensor which detects a pressure is easily realizable, and manufacture of an apparatus can be implement | achieved easily.

  Further, according to the present invention, the tension of the sewing product is automatically obtained, and information on the tension is notified to the operator, so that the operator can easily grasp the tension of the sewing product.

  FIG. 1 is a front view showing a sewn product tension measuring device 20 according to an embodiment of the present invention. The sewn product tension measuring device (hereinafter sometimes simply referred to as “measuring device”) 20 is a device for measuring the tension that is the tension of the sewn product 30. The measuring device 20 includes at least an ejection unit 21 and a detection unit 22, and in the present embodiment, in addition, a supply adjustment unit 23, a gas supply source 24, a control unit 25, a notification unit 26, And a conduit 27.

  The pipe line 27 is a pipe line that can transport a gas such as air. The gas supply source 24 is provided connected to one end portion 27 a of the pipe line 27. The gas supply source 24 is a means for supplying a gas having a pressure higher than the atmospheric pressure, and may be configured to compress and supply ambient air, such as a pump or a blower, The structure which supplies the compressed air accommodated in the container may be sufficient.

  The ejection means 21 is provided connected to the other end portion 27 b of the pipe line 27, and gas is supplied from the gas supply source 24 through the pipe line 27. The ejection means 21 has an ejection hole 31 and is a nozzle device that ejects a supplied gas from the ejection hole 31. By arranging the sewn product 30 so as to cover and close the ejection hole 31, gas can be ejected toward the sewn product 30 by the ejection means 21. The ejection means 21 may be configured separately from the conduit 27 or may be an integral configuration.

  The detection unit 22 is a unit that is interposed in the pipe line 27 between the gas supply source 24 and the ejection unit 21 and detects a state quantity of the gas ejected from the ejection unit 21. The gas state quantity is an amount representing a gas state including pressure, flow rate, and flow velocity. These state quantities are quantities that change according to the gas ejection state. The gas ejection state varies depending on the state in which the ejection hole 31 is covered with the sewing product 30 (hereinafter, sometimes referred to as “covered state”). This covering state changes depending on the tension of the sewing product 30. Therefore, the state quantity of gas changes with the tension of the sewing product. Thus, the detection means 22 detects the state quantity of the gas which fluctuates in response to the fluctuation of the tension depending on the tension of the sewing product.

  In this embodiment, the detection means 22 is a pressure sensor, and detects the gas pressure as the gas state quantity. As the pressure sensor, sensors having various principles and configurations can be used, and are not particularly limited.

  The supply adjusting means 23 is interposed in the pipe line 27 between the gas supply source 24 and the ejection means 21 and adjusts the state quantity of the gas supplied from the gas supply source to the ejection means 21. Specifically, the state quantity of the gas ejected from the ejection hole 31 is constant in a state where the ejection hole 31 is not covered with the sewing product 30, in other words, in a state where the gas can be ejected freely from the ejection hole 31. Thus, the supply state to the ejection means 21 is adjusted.

  In the present embodiment, the supply adjusting unit 23 includes a regulator 33 and a flow rate adjusting valve 34. The regulator 33 and the flow rate adjustment valve 34 are respectively interposed in the pipe line 27.

  The regulator 33 that is a pressure adjusting unit is also called a pressure regulating valve, and adjusts the pressure on the secondary side so as to become the set pressure. Therefore, even if the pressure on the gas supply source 24 side upstream of the regulator 33 in the gas supply direction fluctuates due to the operation of the gas supply source 24 or the like, The pressure on the jetting means 21 side is prevented from fluctuating and is kept constant at the set pressure. The set pressure can be arbitrarily set by an operator.

  The flow rate adjustment valve 34 that is a flow rate adjustment unit is disposed downstream of the regulator 33 in the gas supply direction. The flow rate adjusting valve 34 is configured to be able to adjust the opening degree, and the flow rate of the flow rate adjusting valve 34 can be adjusted by adjusting the opening degree. Therefore, the supply flow rate of the gas supplied from the gas supply source 24 to the ejection means 21 can be adjusted. Moreover, since the pressure is kept constant by the regulator 33 provided on the upstream side, the supply flow rate can also be made constant. The opening degree of the flow rate adjusting valve 34 can be arbitrarily set by an operator.

  Since the supply adjusting means 23 is provided, the pressure and flow rate of the gas supplied to the ejection means 21 can be adjusted to be kept constant. If the pressure and flow rate do not vary, the flow rate is also constant, thereby keeping the gas pressure, flow rate and flow rate constant. In this way, the supply adjustment means 23 keeps the state quantity of the gas supplied from the gas supply source 24 to the ejection means 21 constant.

  The control means 25 is a calculation means for calculating the tension of the sewing product 30 from the gas state quantity detected by the detection means 22 and may be realized by, for example, a central processing circuit (CPU). In the present embodiment, the control means 25 is provided with a detection pressure signal representing the pressure of the gas detected from the detection means 22. The control means 25 includes information representing the relationship between the pressure represented by the detected pressure signal, the gas pressure obtained in advance by a calibration test or the like, and the tension of the sewing product 30 (hereinafter also referred to as “relation information”). From this, the tension of the sewing product 30 is calculated and obtained. The relationship information may be stored in the storage unit 35, and the control unit 25 may be configured to read out the information during the calculation.

  The notifying unit 26 is a unit for notifying information related to the tension of the sewing product 30 (hereinafter also referred to as “tension information”) calculated by the control unit. The notification means 26 is provided with a command signal for instructing to notify information related to the tension of the sewing product 30 from the control means 25, and the notification means 26 notifies the tension information in accordance with this command. In this way, the notification unit 26 is controlled by the control unit 25.

  The tension information may be information indicating the tension, may be information indicating whether the tension is equal to or greater than a predetermined setting value, and indicates whether the tension is within a predetermined range. It may be information. The notification unit 26 is a unit that notifies such tension information.

  The notification means 26 is, for example, a display means, and may display the tension with numbers and colors, may display whether the tension is equal to or greater than a set value, and whether the tension is within the range. May be displayed. In this case, display means capable of displaying numbers and characters, such as a liquid crystal display device, may be used. For example, the display means including one or a plurality of lamps may be used to switch on / off the lamp according to the tension. The configuration may be such that the number of lamps to be changed or the number of lamps to be lit is changed.

  In addition, the notification unit 26 is, for example, a voice output unit, and may be configured to change the volume or timbre according to the tension. Further, a configuration may be adopted in which a warning sound is output when the tension exceeds a predetermined threshold value.

  Further, the notification means 26 is a sensation means for causing the operator to feel the tension information. For example, the notification means 26 may use a sewing machine drive system as the notification means to notify the operator by stopping the sewing operation. The notification unit 26 may be configured by selectively using any one of these specific units, or may be configured by selectively combining a plurality of units.

  FIG. 2 is a cross-sectional view for explaining the principle of measuring the tension with the measuring device 20. FIG. 3 is a graph showing an example of the relationship between tension and pressure obtained by a calibration test. In FIG. 2, the thickness of the sewn product 30 is omitted. FIG. 3 shows the relationship between tension and pressure with different line types for each type of sewing product 30. When gas is ejected toward the sewn product 30, the sewn product 30 is pressed in a direction away from the ejection means 21 by the gas. If the resistance when the gas permeates is constant regardless of the tension of the sewn product 30 at this time, the sewn product 30 is positioned farther from the ejection means as shown in FIG. The higher the tension, the closer to the ejection means as shown in FIG. 2 (2).

  As the sewn product 30 moves away from the ejection means 21, the gas has a lower resistance to ejection and becomes easier to eject. On the contrary, the closer the sewn product 30 is to the ejection means 21, the greater the resistance of the gas to the ejection and the less the gas is ejected.

  Further, the sewn product 30 has different resistance when gas is permeated depending on the type, specifically, the structure and thickness dimension. In particular, when the sewn product 30 is a sewn product that has elasticity and the size of the weave and the stitch changes according to the tension, even when the sewn product is the same, the resistance when gas is permeated by the tension. Changes. Therefore, not only the position of the sewn product 30 in the proximity and separation direction with respect to the ejection means 21, but also the resistance to ejection, that is, the ease of ejection varies depending on the type of the sewn product 30, the texture and the stitch size. When the ease of ejection changes, the gas ejection state changes, and the state quantity including the pressure of the ejected gas changes.

  Thus, the state quantity of the gas ejected from the ejection means 21 varies depending on the determining factors including the tension of the sewing product 30. Therefore, by performing a calibration test, as shown in FIG. 3, for each type of sewn product 30, information indicating the relationship between the pressure, which is one of the state quantities, and the tension, that is, the above-described relationship information is obtained. The relationship information can be used to calculate the tension of the sewing product 30 from the gas pressure during actual sewing.

  As described above, according to the measuring device 20, gas is ejected toward the sewing product 30 by the ejection means 21, and a state quantity representing the state of the gas, for example, pressure, is detected by the detection means 22. By detecting this state quantity, the tension of the sewing product 30 can be calculated and obtained by the control means 25. In such a measuring device 20, it is only necessary to provide the ejection means 21 in the vicinity of the position where the tension of the sewing product 30 is to be measured, and other components, specifically, the detection means 22 and the supply adjustment means 23. The gas supply source 24 and the like can be provided at remote positions, and there are few restrictions on the installation location. In addition, there is no restriction on the holding and arrangement of the sewing product 30 such as holding the sewing product 30 using a roller or the like, and the tension can be measured even if the operator puts his hand on the sewing product.

  Further, the supply adjustment means 23 adjusts the state quantity of the gas supplied from the gas supply source 24 to the ejection means 21 to be kept constant. As a result, the state quantity of the gas detected by the detection means 22 can be prevented from changing depending on the supply state, and the tension can be measured with high accuracy by changing only the tension of the sewing product 30.

  Further, the control means 25 can automatically obtain the tension, and the notifying means 26 can notify the operator of information regarding the required tension of the sewn product 30. An operator can easily grasp the tension of the sewing product 30. Therefore, even if the operator does not have a high level of skill, it is possible to grasp the tension of the sewing product 30 and achieve a suitable sewing operation.

  FIG. 4 is a perspective view showing the sewing machine 40 provided with the measuring device 20. FIG. 5 is a block diagram showing a configuration of the measuring apparatus 20. FIG. 6 is an enlarged perspective view showing the vicinity of the needle plate 41 of the sewing machine 40. The sewing machine 40 sews a second sewn product 42 (hereinafter also referred to as a “strip-like object”) as a belt-like product to a first sewn product (hereinafter sometimes referred to as a “strip”) 30 that is a fabric. Machine, for example, a staggered sewing machine. In the case of a staggered sewing machine, for example, a lace strip is sewn as a bra decoration. In addition, other types of sewing machines are used, for example, when a rubber string is sewn on the waist or legs of a swimsuit.

  The sewing machine 40 includes a sewing machine body 47 and a measuring device 20. The sewing machine body 47 is placed on the bed 48 on which the needle plate 41 is provided in a state where the sewing products 30 and 42 are stacked, and the sewing products 30 and 42 are sandwiched between the needle plate 41 and the presser foot 43. In this state, the needle 44 is reciprocated up and down while being fed in the feed direction A by a feed mechanism (not shown) having a feed dog, and the needle thread is inserted into the respective sewing products 30 and 42 to synchronize with the vertical movement of the needle. Then, the needle thread is captured by the rotary-driven hook 49, and the bobbin thread is engaged to form a stitch. In this way, the sewing products 30 and 42 are sewn.

  When the sewing products 30 and 42 are sewn by the sewing machine main body 47, the belt-like object 42 is automatically supplied by the supply device 48 in accordance with the sewing operation of the sewing machine main body 47. , The operator puts his hand on the upstream side in the feed direction A with respect to the needle drop position, and assists the feed to the sewing position in an extended state suitable for sewing without wrinkles and the like. At this time, if the tension applied to the fabric 30 with the assistance of the operator changes, variations in dimensions and the like occur in the sewing product. In order to prevent this, the tension of the fabric 30 is measured and the operator is notified. Thus, a measuring device 20 is provided.

  The ejection means 21 is provided by being attached to the needle plate 41. The ejection means 21 is provided close to the feed dog on the upstream side in the feed direction A with respect to the needle drop position of the needle plate 41. The ejection means 21 is provided above the needle plate 41 so that the ejection holes 31 open upward, and can eject gas toward the dough 30 provided on the needle plate 41. With such a configuration, it is possible to measure the tension immediately before sewing in the vicinity of the sewing position of the fabric 30 that is handed by an operator and assists in feeding.

  Thus, when the measuring device 20 is provided in the sewing machine 40, the display means 50, the drive system 51 of the sewing machine main body 47, and the buzzer 52 may be used as the notification means 26. In this case, the display unit 50, the drive system 51 of the sewing machine main body 47, and the buzzer 52 may all be used, but one or two of them may be selected and used.

  The display means 50 has a plurality of, for example, five lamps made of light emitting diodes (LEDs), for example, and is controlled by the control means 25 to turn on a number of lamps corresponding to the tension of the fabric 30. The tension of the fabric 30 is displayed according to the number of lighting. More specifically, a different lighting / extinguishing switching tension may be set for each lamp, and the number of lamps that are lit may be changed according to the tension of the fabric 30. In this case, lamps of different colors such as a lamp whose switching tension is less than a predetermined first threshold value are green and a lamp whose switching tension is equal to or higher than the first threshold value are red may be used. By such display, the operator can grasp the tension.

  The drive system 51 of the sewing machine main body 47 includes, for example, a drive source (not shown) which is a motor and a power generation transmission mechanism such as a pulley 53, and a sewing mechanism 54 including a needle 44, a hook 49 and a feed mechanism. When the drive system 51 is also used as the notification unit 16, the drive system 51 is controlled by the control unit 25. Specifically, when the tension of the fabric 30 is less than a predetermined second threshold value, the sewing operation is permitted according to other operations by the operator, and when the tension is equal to or higher than the second threshold value. The sewing operation is forcibly suspended regardless of other operations by the operator. Thus, the operator can feel that the sewing operation of the sewing machine main body 47 has stopped and can grasp the tension. This drive system 51 is a sensation means.

  The buzzer 52 is an audio output unit and is controlled by the control unit 25. Specifically, when the tension of the fabric 30 is less than a predetermined third threshold value, the output of the warning sound is paused, and when it is equal to or higher than the third threshold value, the warning sound is output. Thereby, the operator can grasp the tension by the warning sound.

  The aforementioned first to third threshold values may be the same or different from each other. Further, the display means 56 may be configured to display the tension as a number. Further, the buzzer 52 may be configured such that at least one of the volume and the timbre changes according to the tension of the fabric 30.

  FIG. 7 is a plan view showing the needle plate 41. FIG. 8 is a cross-sectional view seen from the section line S8-S8 in FIG. FIG. 9 is a front view showing the first member 55 of the ejection means 21. FIG. 10 is a plan view showing the first member 55. FIG. 11 is a front view showing the second member 56 of the ejection means 21. A cylindrical mounting hole 58 for mounting the ejection means 21 is formed in the needle plate 41 in the thickness direction at a position upstream of the center point C of the needle drop position in the feed direction A. Has been. The mounting hole 58 is formed at a position that does not hinder the operation of the feed dog and as close as possible to the center point C of the needle drop position.

  The ejection means 21 has first and second members 55 and 56. The first member 55 includes a fitting portion 60 having an outer diameter smaller than the inner diameter of the mounting hole 58, and a locking portion 61 that continues to one side in the axial direction of the fitting portion 60. The locking portion 61 has a truncated cone shape having a large diameter on the other side in the axial direction (fitting portion 60), and the largest diameter portion has an outer diameter larger than the inner diameter of the mounting hole 58. In the first member 55, the ejection hole 31 is formed at the end on the axial direction locking portion side, and the inner hole 62 that is continuous with the ejection hole 31 is formed. The ejection hole 31 opens in one axial direction, and the inner hole 62 opens in the other axial direction. An inner screw is engraved on the other side of the first member 55 in the axial direction.

  The second member 56 includes a base portion 64 and a connecting portion 63 that continues to one side in the axial direction of the base portion 64. The base portion 64 has an outer diameter larger than the inner diameter of the mounting hole 58, and a hook portion 65 for hooking the tool is formed on the surface portion on the other side in the axial direction. The connecting portion 63 is engraved with an external screw and is configured to be screwable to the first member 55. The second member 56 is formed with a passage hole 66 that opens in the radial direction at the base portion 64 and opens in the axial direction at the connecting portion 63. The base 64 of the second member 56 is provided with an internal thread at a portion 80 facing the passage hole 66 so that the other end of the conduit 27 can be screwed and connected.

  The ejection means 21 is screwed to each other in a state where the first member 55 is disposed on the upper side of the needle plate 41 and the second member 56 is disposed on the lower side of the needle plate 41 and is inserted into the mounting hole 58. The needle plate 41 is attached to the needle plate 41 while being sandwiched from both sides in the vertical direction (both sides in the thickness direction). In this way, the nozzle plate 41 is mounted on the needle plate 41 and is configured as a nozzle device that ejects gas from the ejection holes 31 on the upper side of the needle plate 41. The portion protruding upward from the needle plate 41 is only the locking portion 61 in the first member 55, so that the feeding of the fabric 33 can be prevented from being hindered. Moreover, the taper is tapered toward the top (tip), and smooth feeding of the fabric 33 can be achieved.

  The above-described embodiment is merely an example of the present invention, and the configuration can be changed. For example, the state quantity of the gas detected by the detection means 22 may be a flow velocity or a flow rate instead of the pressure, or a plurality of state quantities may be detected. In addition, the tension of other sewing products such as the belt-like object 42 may be measured in addition to the cloth 30 that the operator attaches with his / her hand to assist feeding. Moreover, you may provide in other sewing machines other than a staggered sewing machine. Further, the first and second members 55 and 56 constituting the ejection means 21 may be configured such that the first member 56 is provided with an external screw and the second member 57 is provided with an internal screw.

It is a front view which shows the sewn product tension | tensile_strength measuring apparatus 20 of one Embodiment of this invention. FIG. 4 is a cross-sectional view for explaining the principle of measuring tension with the measuring device 20. It is a graph which shows an example of the relationship between the tension | tensile_strength calculated | required by the calibration test. It is a perspective view which shows the sewing machine 40 with which the measuring apparatus 20 is provided. 2 is a block diagram showing a configuration of a measuring device 20. FIG. 3 is an enlarged perspective view showing the vicinity of a needle plate 41 of the sewing machine 40. FIG. 3 is a plan view showing a needle plate 41. FIG. FIG. 8 is a cross-sectional view seen from the section line S8-S8 in FIG. 4 is a front view showing a first member 55 of the ejection means 21. FIG. 4 is a plan view showing a first member 55. FIG. It is a front view which shows the 2nd member 56 of the injection means 21. FIG. It is a skeleton figure which simplifies and shows the elastic tape feeder 1 which is a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 20 Sewing thing tension | tensile_strength measuring apparatus 21 Ejection means 22 Detection means 23 Supply adjustment means 24 Gas supply source 25 Control means 26 Notification means 27 Pipe line 30,42 Sewing thing 31 Ejection hole 33 Regulator 34 Flow control valve 35 Storage means 40 Sewing machine 41 Needle Plate 50 Display means 51 Drive source 52 Buzzer 53 Drive source 54 Sewing mechanism

Claims (4)

Jetting means for jetting the gas supplied from the gas supply source toward the sewing product;
Sewing product tension measuring apparatus comprising: detecting means for detecting a state quantity of gas ejected from the ejection means.   The sewing product tension according to claim 1, further comprising a supply adjusting means that is interposed between the gas supply source and the ejection means and adjusts a state quantity of the gas supplied from the gas supply source to the ejection means. measuring device.   The sewing product tension measuring apparatus according to claim 1 or 2, wherein the gas state quantity includes pressure. Calculation means for calculating the tension of the sewing product from the gas state quantity detected by the detection means;
The sewing-tension measuring apparatus according to any one of claims 1 to 3, further comprising notification means for notifying information on the tension of the sewing product obtained by the calculation means.

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