JPH0967739A - Warp feeding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a warp feeding device which can adjust the tension of the warp yarns with high precision. SOLUTION: This warp feeding device is equipped with a means for measuring the tension on a warp Y and the means is equipped with a movable roller 56 which displaces itself according to the tension on the warp. The movable roller 56 is energized with springs 60a and 60b in the direction almost reverse to the feeding one of the warp Y. In addition, the measuring means is provided with a plate 72 which is bent dependingly on the displacement of the movable roller 56. A strain gauge 74 is loaded on the main face of the plate 72 to detect the strain of the plate 72. Further, this warp feeding device 10 is provided with a controlling unit which controls the rotation number of an inverter motor correspondingly to the tension of the warp Y detected by the measuring means. The controlling unit automatically increases or decreases the rotation number of the inverter motor so that the tension on the warp Y may be kept constant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a warp yarn delivering device, and more particularly to a warp yarn delivering device suitable for use in, for example, a loom for so-called narrow fabrics.

[0002]

2. Description of the Related Art FIG. 10 is an illustrative view showing an example of a conventional warp yarn feeding device which is the background of the present invention. This warp yarn feeding device 1 is used for a needle loom,
It includes a long rod-shaped swing member 2. The rocking member 2 is a warp yarn Y.
Is arranged below the beam B that has been wound and held. The swing member 2 is swingably supported near one end in the longitudinal direction. The weight 3 is fixed to the other end of the swing member 2. Further, near the other end of the swinging member 2, a roller 4 for wrapping the warp yarn Y and changing the transport direction is rotatably provided.

Further, the warp yarn feeding device 1 includes a band belt 5 for limiting the rotation of the beam B by a frictional force. The band belt 5 is arranged so as to be wound around the beam B, and both ends thereof are connected to the swing member 2.

The warp yarn feeding device 1 employs a so-called negative feed-out mechanism in which the warp yarn Y rotates a beam by a force pulled by a needle loom (not shown). Then, in the warp yarn feeding device 1, the warp yarn Y to be transferred is
The swing member 2 is lifted upward when the tension applied to the weight becomes larger than the gravity applied to the weight 3. Then
The frictional force acting between the band belt 5 and the beam B is reduced, and the beam B is rotated with a light force, so that the tension applied to the warp yarn Y is reduced. Next, when the tension applied to the warp yarn Y becomes smaller than the gravity applied to the weight 3, the swing member 2 swings downward. Then the band belt 5
Since the frictional force acting between the beam B and the beam B becomes large and the beam B becomes difficult to rotate, the tension applied to the warp yarn Y becomes large. As described above, the warp yarn feeding device 1 attempts to make the tension applied to the warp yarn Y constant by causing the swinging member 2 to repeatedly swing up and down.

[0005]

However, since the narrow width fabric has a small number of warp threads and has a smaller tension than the wide width fabric, high precision is required for adjusting the warp tension. In addition, since the number of warp yarns in a narrow woven fabric varies greatly depending on the product, the standard tension also changes significantly. Therefore, the warp thread tension adjusting device must be able to control the tension in a wide range. However, in the conventional warp yarn delivery device 1 as shown in FIG. 10, since the outer radius and the inner radius of the beam B are different, the moment of force is different and the tension applied to the warp yarn Y is also different. Also, the band belt 5
The frictional force between the beam and the beam B varies depending on changes in humidity and the like, and it is difficult to keep the tension constant. Further, the total weight of the beam B and the warp yarn Y may cause the tension applied to the yarn to become too large. As described above, in the conventional warp yarn feeding device 1, the tension cannot be adjusted with high accuracy.

In the field of so-called wide loom, there is a warp tension adjusting device using a pressure sensor such as a load cell. However, since the load cell of the warp tension adjusting device for such a wide width loom has a large capacity and is inaccurate, it is not suitable for highly accurate adjustment of a small tension in the case of a narrow woven fabric.

Therefore, a main object of the present invention is to provide a warp yarn feeding device capable of highly accurately adjusting the tension of the warp yarn.

[0008]

SUMMARY OF THE INVENTION According to the present invention, a beam for winding and holding a warp yarn is rotated to feed a warp yarn to a loom, and a tension applied to the warp yarn fed by the motor. A warp yarn feeding device including a measuring means and a control means for controlling a rotation speed of a motor according to a tension measured by the measuring means,
The measuring means changes the transport direction so as to wind the warp yarn, and displaces the movable roller according to the tension applied to the warp yarn, the plate-shaped member that bends according to the displacement of the movable roller, and the bending of the plate-shaped member. Is a warp yarn feeding device including a detection means for detecting

Further, the present invention preferably includes an elastic body for urging the movable roller in a direction substantially opposite to the direction in which the warp yarn is transported.

Further, the present invention preferably includes display means for continuously displaying the tension measured by the measuring means.

Further, the control means is connected to the setting circuit for setting the tension as a reference, the setting circuit and the measuring means, and sets the set value set by the setting circuit and the measured value measured by the measuring means. It is connected to the comparison circuit for comparison, the comparison circuit and the motor, and changes the frequency of the motor drive signal according to the difference between the set value and the measured value,
An inverter circuit for changing the rotation speed of the motor may be included.

[0012]

In the warp yarn feeding device according to the present invention, the motor rotates the beam to positively feed the warp yarn to the loom. The warp thread sent out is displaced in the transfer direction so as to be wound around the movable roller. When tension is applied to the warp yarn in this state, the movable roller is displaced to bend the plate member. The deflection of the plate member is proportional to the tension applied to the warp yarn. Then, the tension applied to the warp yarn is measured by detecting the bending of the plate-shaped member by the detection means. Further, the rotation speed of the motor is controlled by the control means in accordance with the measured tension.
For example, when the tension applied to the warp thread becomes too large, the number of rotations of the motor is automatically increased, the feeding speed of the warp thread is increased, and the tension is reduced. Further, when the tension applied to the warp thread becomes too small, the rotation speed of the motor is automatically lowered, the feeding speed of the warp thread is reduced, and the tension is increased. By repeating such an adjusting operation, the tension applied to the warp yarn is made constant.

Further, when the movable roller is urged by the elastic body in a direction substantially opposite to the direction in which the warp yarn is transferred, unnecessary vibration transmitted from the loom is suppressed and the measuring means is not affected. Can be Further, this elastic body has a function of making the tension applied to the warp thread constant. That is, when a strong tension is applied to the warp thread,
The contraction of the elastic body reduces the tension applied to the warp thread. Also, when the tension applied to the warp thread weakens,
The tension applied to the warp threads is strengthened by the stretch of the elastic body.

Further, when the tension measured by the measuring means is continuously displayed by the display means, the operator can check the tension applied to the warp thread at any time during the operation of the loom.

The control means includes a setting circuit, a comparison circuit,
In the case where the inverter circuit and the inverter circuit are included, the setting circuit sets the reference tension. By the comparison circuit,
The set value and the measured value are compared. Then, the frequency of the motor drive signal is changed by the inverter circuit according to the difference between the set value and the measured value, and the rotation speed of the motor is changed.

[0016]

According to the warp yarn feeding device of the present invention, the tension applied to the warp yarn is measured by bending the plate member by the tension applied to the warp yarn and detecting the bending by the detecting means. Minor changes can be measured. Then, by controlling the rotation speed of the motor based on the measurement result, the tension of the warp yarn can be adjusted with high accuracy. As a result, it is possible to efficiently and rationally fabricate an ultrathin fabric using an ultrafine warp yarn, which has been difficult in the past, and the present invention is extremely useful.

The fact that the tension applied to the warp yarn is constant means that the length of the warp yarn delivered per unit time is always constant. On the other hand, the radius of the warp thread wound around the beam decreases with the lapse of time, and the length of the warp thread delivered per one rotation also decreases. However, in the warp yarn feeding device according to the present invention, the number of rotations of the motor increases with the passage of time by feeding the warp yarn by the above-described action. Therefore, the warp yarn delivery length per unit time is kept constant, and the tension applied to the warp yarn can be made constant.

The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments of the present invention with reference to the drawings.

[0019]

FIG. 1 is an illustrative view showing a use situation of an embodiment of the present invention. The warp yarn feeding device 10 of this embodiment is used in a needle loom L for narrow width fabrics. The warp yarn Y is fed from the warp yarn feeding device 10 to the main body of the needle loom L through a plurality of rollers and the like. Then, the warp yarn Y is woven into a narrow woven fabric such as a tape or a ribbon in the main body of the needle loom L, and the woven fabric is wound by the winding device M.

FIG. 2 is a perspective view showing an embodiment of the present invention. The warp yarn feeding device 10 of this embodiment includes a base 12. A substantially cylindrical beam 18 is rotatably held on the base 12 via a bearing 14 and a shaft 16. A plurality of warp yarns Y are wound around the beam 18 in parallel.

A gear 20 is fixed to one end of the shaft 16. A gear 22 is arranged near the lower portion of the base 12 so as to face the gear 20. A chain 24 is stretched between the gear 20 and the gear 22. The gear 22 is
It is connected to a gearbox 28 via a shaft 26, and the gearbox 28 is connected to an inverter motor 30. The inverter motor 30 changes the rotation speed with a constant torque by changing the frequency of the drive signal. The inverter motor 30 of this embodiment is selected and used so as to completely include the variable range of the rotational speed of the warp yarn Y tension. The gear box 28 and the inverter motor 30 are placed below the base 12. Further, the inverter motor 3 is provided below the base 12.
Zero power source 32 is mounted.

The base 12 is formed with a pair of left and right substantially triangular pillar members 34a and 34b provided so as to extend upward. In the description of this embodiment, the members having the same reference numerals are a pair of members on the left and right in the axial direction of the movable roller 56, and the members having a as the reference numeral are on the mounting side plate 36a side. Is provided on the mounting side plate 36b side. A substantially triangular mounting side plate 36a is fixed to the pillar member 34a. An inverter box 38 incorporating an inverter circuit for controlling the inverter motor 30 is attached to the outer surface of the attachment side plate 36a. A bearing plate 40a is fixed to a substantially tip end portion of the mounting side plate 36a opposite to the pillar member 34a so as to protrude outward. A bearing 41a for receiving a shaft of a fixed roller described later is fixed to the bearing plate 40a so as to penetrate the main surface thereof. Further, a substantially rectangular regulating side plate 42a for regulating the displacement of the shaft of the movable roller described later is attached so as to extend upward from the bearing plate 40a. The restriction side plate 42a is formed with an elongated hole-like restriction hole 43a for allowing the shaft of the movable roller to be inserted through the main surface thereof and restricting the displacement of the shaft of the movable roller at the inner peripheral end surface thereof. To be done.

The pillar member 34b has a substantially triangular mounting side plate 3
6b is fixed. A bearing plate 40b for receiving a shaft of a fixed roller, which will be described later, is provided at a substantially tip end portion of the mounting side plate 36b opposite to the pillar member 34b so as to face the bearing plate 40a in the longitudinal direction of the fixed roller. It is fixed in this way. A bearing 41b for receiving the shaft of a fixed roller described later is fixed to the bearing plate 40b so as to penetrate the main surface thereof. Further, above the pillar member 34b of the mounting side plate 36b, as shown in FIG. 5, a setting box 4 having a built-in setting circuit for setting a reference value of warp thread tension is provided.
4 is attached. Further, a setting volume 46 for fixing a reference value of the warp thread tension that is gripped and held by an operator is fixed to a substantially central portion of the mounting side plate 36b. The setting volume 46 and the setting circuit in the setting box 44 are connected by an electric wire as shown in FIG.

A substantially rectangular restricting side plate 42b for restricting displacement of the shaft of the movable roller, which will be described later, extends upward from the bearing plate 40b and faces the restricting side plate 42a in the longitudinal direction of the movable roller. Is attached as. The restriction side plate 42b has a long hole-shaped restriction hole 43 for allowing the shaft of the movable roller to pass through the main surface of the restriction side plate 42b and restricting the displacement of the shaft of the movable roller at the inner peripheral end surface thereof.
b is formed. A measurement control box 48 incorporating a measuring unit and a control unit for measuring the displacement of the movable roller is attached to the outer surface of the regulation side plate 42b. The restriction holes 43a and 43b are formed long in the direction in which the warp yarn Y is transferred to the loom L, that is, in the direction in which tension is applied.

A fixed roller 50 is rotatably arranged between the bearing plates 40a and 40b. The shaft 52 of the fixed roller 50 is rotatably supported by the bearings 41a and 41b of the bearing plates 40a and 40b.

On both sides of the fixed roller 50, substantially rectangular parallelepiped column members 54a and 54b for axially supporting a movable roller, which will be described later, are arranged so as to extend substantially vertically upward from both ends of the fixed roller 50. In the vicinity of the lower end of the pillar member 54a,
The shaft 52 on the side of the bearing plate 40a is rotatably inserted. The shaft 52 on the bearing plate 40b side is rotatably inserted near the lower end of the column member 54b. Therefore, the pillar members 54a and 54b are provided so as to be rotatable around the shaft 52.

Above the fixed roller 50, the fixed roller 5
A movable roller 56 is rotatably arranged in parallel with zero. The movable roller 56 constitutes a part of the measuring means of the warp yarn feeding device 10 of this embodiment. The shaft 58 of the movable roller 56 is rotatably supported by the column members 54a and 54b. Further, the shaft 58 of the movable roller 56 is extended in the axial direction of the movable roller 56, and the restriction hole 4 is an elongated hole for restricting the swinging of the movable roller 56 in the warp yarn transfer direction.
3a and 43b are inserted so as to be displaceable in the longitudinal direction thereof, and further extended to the outside of the regulation side plates 42a and 42b. Therefore, the movable roller 56 can swing back and forth by the length of the restriction holes 43a and 43b in the front-back direction of the warp yarn transfer direction with the rotational movement of the pillar members 54a and 54b about the shaft 52. Bearings are provided at portions of the pillar members 54a and 54b corresponding to the shaft 52 and the shaft 58.

Further, springs 60a and 60b as urging means for urging the shaft 58 of the movable roller 56 are arranged above the mounting side plates 36a and 36b, respectively. The T-shaped connecting fittings 62a and 64a are fixed to both ends of the spring 60a.
As shown in FIG. 3, substantially T-shaped connecting fittings 62b and 64b are fixed to both ends of the spring 60b. Although FIG. 3 illustrates a state in which each member is attached to the attachment side plate 36b, a state in which each member is attached to the attachment side plate 36a is almost the same as that in FIG.

The connection fittings 62a and 62b on one end side of the springs 60a and 60b are held by block-shaped holding members 66a and 66b. The holding members 66a and 66b are fixed to the upper portions of the mounting side plates 36a and 36b, as shown in FIG. 6 and 9 illustrate the state in which each member is attached to the attachment side plate 36b, the state in which each member is attached to the attachment side plate 36a is almost the same as in FIGS. 6 and 9. Recesses 68a and 68b for fitting the shafts of the connecting fittings 62a and 62b into the holding members 66a and 66b.
Is formed. Further, the holding members 66a and 66b are provided with adjusting screws 73a and 73b for abutting and fixing the connecting fittings 62a and 62b and adjusting the biasing force of the springs 60a and 60b. The adjusting screws 73a and 73b are screwed into the holding members 66a and 66b so as to be inserted into the recesses 68a and 68b from one ends of the holding members 66a and 66b. The operator can finely adjust the urging force of the springs 60a and 60b by rotating the adjusting screws 73a and 73b.

On the other hand, the connection fittings 64a and 64b on the other end side of the springs 60a and 60b are respectively shown in FIG.
As shown in FIG. 7, the support members 70a and 70b each have a substantially L-shaped cross section. Support members 70a and 70
b is a holding member 6 on the upper side of the mounting side plates 36a and 36b.
It is fixed to 6a and 66b at a predetermined interval. Through holes 71a and 71b are formed in the support members 70a and 70b near their upper ends. Connection fitting 6
4a and 64b are through holes 71a and 71, respectively.
b is slidably inserted, and further column members 54a and 5
It is brought into contact with the main surface of 4b.

Thus, the springs 60a and 60b, which are the urging means of this embodiment, have their one ends supported by the support members 70a and 70b through the connection fittings 64a and 64b, and the column members 54a and 54b.
Is held in a semi-fixed manner by being tightened in the direction in which it is compressed by the adjusting screws 73a and 73b while being held by the holding members 66a and 66b via the connection fittings 62a and 62b. By adopting such a holding structure, the user can easily replace the spring with an appropriate biasing force.

Next, the measuring means and control means of this embodiment will be described in detail. FIG. 5 is a perspective view showing a state where the cover of the measurement control box 48 is removed to expose the internal measuring means and control means. The measuring means of this embodiment includes a strip-shaped plate member 72 that is formed so as to bend in accordance with the displacement of the shaft 58 of the movable roller 56. The plate-shaped member 72 constitutes a part of the measuring means of the warp yarn feeding device 10 of this embodiment. The plate member 72 of this embodiment is made of a flexible metal elastic body. The plate-shaped member 72 is arranged at a distance from the regulating side plate 42b, and the lower end portion thereof is fixed to a piece member provided so as to project from the outer surface of the regulating side plate 42b. The upper end of the plate member 72 is arranged so as to extend substantially vertically upward, and abuts on the same side of the shaft 58 as the direction in which the warp yarn Y is delivered. Therefore, when the movable roller 56 and the shaft 58 are displaced by the tension applied to the discharged warp yarn Y, the shaft 58 presses the vicinity of the upper end portion of the plate-shaped member 72 and the plate-shaped member 72.
Will be bent. On the other hand, when the tension of the warp yarn Y is weakened,
The movable roller 56 and the shaft 58 are displaced by the biasing forces of the springs 60a and 60b in the original position, that is, in the direction opposite to the direction in which the warp yarn Y is transported. Along with this, the plate member 72 having flexibility returns to the original substantially linear shape due to the restoring force of the object itself.

On one main surface of the plate-like member 72, a strain gauge 74 as a detecting means which is a part of the measuring means of this embodiment is provided.
Is affixed. The strain gauge 74 is provided so as to be distorted according to the bending of the plate member 72, and can detect the bending of the plate member 72 as a change in resistance value. The strain gauge 74 is electrically connected to the tension detection circuit 78 on the circuit board 76. The circuit board 76 is fixed to the outer surface of the regulation side plate 42b. On the circuit board 76, a plurality of electronic components constituting the measuring means and control means of this embodiment are fixed.

FIG. 8 is a block diagram showing the electrical connection status of this embodiment. The measuring means of this embodiment includes a tension detecting circuit 78. The tension detection circuit 78 is
The movable roller 56 and the shaft 5 are connected to the strain gauge 74.
The displacement of 8 is converted into an electric signal. The tension detection circuit 78 is electrically connected to the filter 80 for removing noise. That is, since the output voltage obtained from the strain gauge 74 and the tension detection circuit 78 is a minute voltage and contains a lot of noise, it is not suitable for amplification as it is. Therefore, before amplification, the filter 80
To remove noise.

Further, the filter 80 is electrically connected to an integral amplification arithmetic circuit 82 for smoothing and amplifying the waveform of the output signal from the filter 80. That is,
Since the warp yarn Y is transferred while being woven by the needle loom L, mechanical vibration from the loom is included in the output signal from the filter 80 as low-frequency noise.
Therefore, in this embodiment, the signal is smoothed by performing integration processing by the integral amplification calculation circuit 82. Then, an output signal is obtained by amplifying the smoothed signal by a predetermined magnification.

The output signal from the integral amplification calculation circuit 82 is electrically connected to the tension indicator 84 as the display means of this embodiment. The tension indicator 84 is
This is for continuously digitally displaying the measured tension of the warp yarn Y in real time.

Further, the control means of this embodiment includes a tension setting device 86 for setting the reference value of the warp thread tension. The tension setting device 86 of this embodiment is composed of a setting circuit in the setting box 46 connected to the setting volume 46. The operator rotates the setting volume 46 to set a desired reference value. At that time, the reference value set by the tension setting device 86 is displayed by switching the display of the tension display device 84.

The tension setting device 86 is electrically connected to a comparison control circuit 88 as a comparison circuit. The comparison control circuit 88 is also connected to the integral amplification arithmetic circuit 82 and compares the output signal from the integral amplification arithmetic circuit 82 with the reference value set by the tension setting device 86. Then, the difference between the output signal and the reference value is output.

The comparison control circuit 88 is electrically connected to the inverter circuit 90 in the inverter box 38. The inverter circuit 90 inversely converts the DC signal from the comparison control circuit 88 into an AC signal for driving the inverter motor 30. At that time, the inverter circuit 90 changes the frequency based on the difference signal from the comparison control circuit 88.

The inverter circuit 90 is connected to the inverter motor 30. The inverter motor 30 rotates the beam 18 via the gear box 28 and the like while changing the rotation speed with a constant torque based on the drive signal from the inverter circuit 90.

Next, the operating condition of the warp yarn feeding device 10 according to this embodiment will be described with reference to FIG. First, the operator uses the tension setting device 86 to
Set the standard warp thread tension. Next, the beam 18 is rotated by the inverter motor 30 to positively send the warp yarn Y to the needle loom L. As shown in FIGS. 2 and 6, the warp yarn Y sent out is moved by the movable roller 5
The transfer direction is displaced so as to be wound around 6, and is supplied to the needle loom L to be woven. When tension is applied to the warp yarn Y in this state, the movable roller 56 is displaced,
As shown in FIG. 7B, the plate member 72 is bent. The bending of the plate member 72 is proportional to the tension applied to the warp yarn Y. The bending of the plate member 72 is caused by the strain gauge 74.
The tension applied to the warp yarn Y is measured by amplifying the signal detected by the tension detection circuit 78 and the filter 80 and the integral amplification calculation circuit 82. This tension is displayed on the tension indicator 84 in real time. Since the measured tension is continuously displayed by the tension indicator 84, the operator can check the tension applied to the warp yarn Y at any time during the operation of the needle loom L.

At the same time, the comparison control circuit 88 takes the difference between the output signal from the integral calculation circuit 82 and the reference value set by the tension setting device 86. Then, the inverter circuit 90 controls the rotation speed of the inverter motor 30 according to the signal of the difference. For example, when the tension applied to the warp yarn Y becomes too large, the rotation speed of the inverter motor 30 automatically increases and the warp yarn Y
The feeding speed of the is increased and the tension is reduced. Also,
When the tension applied to the warp yarn Y becomes too small, the number of revolutions of the inverter motor 30 is automatically reduced, the feeding speed of the warp yarn Y is reduced, and the tension is increased. By repeating such an adjusting operation, the tension applied to the warp yarn Y is made constant.

The movable roller 56 includes a spring 60.
The warp yarn Y is urged by a and 60b in a direction substantially opposite to the direction in which the warp yarn Y is transferred. Therefore, unnecessary vibration transmitted from the needle loom L is suppressed, and it is possible to prevent the measuring means from being affected. In addition, the spring 60
The a and 60b have a function of making the tension applied to the warp yarn Y constant. That is, when a strong tension is applied to the warp yarn Y, the tension applied to the warp yarn Y is weakened by contracting the springs 60a and 60b. Also,
When the tension applied to the warp yarn Y is weakened, the tension applied to the warp yarn Y is increased by extending the springs 60a and 60b.

As described above, according to the warp yarn feeding device 10 of this embodiment, the tension applied to the warp yarn Y is obtained by bending the plate member 72 by the tension applied to the warp yarn Y and detecting the bending by the detecting means. Is measured, a minute change in tension can be measured. The tension of the warp yarn Y can be adjusted with high accuracy by controlling the rotation speed of the inverter motor 30 based on the measurement result. As a result, it is possible to efficiently and rationally weave an ultrathin fabric using the ultrafine warp yarn Y, which has been difficult in the past.

The fact that the tension applied to the warp yarn Y is constant can be translated into that the length of the warp yarn Y delivered per unit time is always constant. on the other hand,
The radius of the warp yarn Y wound around the beam 18 decreases with the lapse of time, and the length of the warp yarn Y delivered per one rotation also decreases. However, in the warp yarn feeding device 10 according to this embodiment, the warp yarn Y
Is output, the rotational speed of the inverter motor 30 increases with the passage of time. Therefore, the warp yarn Y delivery length per unit time is kept constant, and the tension applied to the warp yarn Y can be made constant.

FIG. 9 is a side view solution diagram showing a modified example of the main part of the warp yarn feeding device shown in FIG. In this modified example of the main part, the diameter is smaller than that of the springs 60a and 60b,
It includes springs 92a and 92b having weak biasing force. The connection fittings 62a, 62 of the springs 60a, 60b are provided at both ends of each of the springs 92a, 92b.
b, 64a, and 64b, the connection fittings 94a,
94b, 96a, and 96b are fixed. Springs 92a and 92b are springs 60a and 60
It is arranged below b and is supported by holding members 66a and 66b and supporting members 70a and 70b like springs 60a and 60b. In addition, the holding member 66
Similarly to the adjusting screws 73a and 73b, adjusting screws 98a and 98b for adjusting the biasing force of the springs 92a and 92b by abutting and fixing the connecting fittings 94a and 94b are provided on the a and 66b.

In the case of the modification shown in FIG. 9, the springs 60a, 60b and the spring 92a having different biasing forces are used.
By providing and 92b, it is possible to suppress the mechanical vibrations of different resonance frequencies and further reduce the influence of the mechanical vibration of the loom on the measuring means.

In this embodiment, the warp yarn feeding device 1 is
Although the case where 0 is used for the needle loom L has been described,
Not limited to this, the warp yarn feeding device 10 may be used in a loom of another type, for example, a loom for wide fabrics. Further, as the detecting means, the strain gauge is used in the above-mentioned embodiment, but the present invention is not limited to this, and for example, a piezoelectric sensor may be used.

[Brief description of drawings]

FIG. 1 is an illustrative view showing a loom to which an embodiment of the present invention is applied.

FIG. 2 is a perspective view showing one embodiment of the present invention.

FIG. 3 is a perspective view showing a main part of the warp yarn feeding device shown in FIG.

FIG. 4 is a front view solution diagram showing a main part of the warp yarn feeding device shown in FIG. 2;

5 is a perspective view showing another main part of the warp thread feeding device shown in FIG. 2. FIG.

FIG. 6 is a side view solution diagram showing another main part of the warp yarn feeding device shown in FIG. 2;

FIG. 7 is an illustrative view showing an operation state of a main part of the warp yarn feeding device shown in FIG.

8 is a block diagram showing an electrical connection state of the warp yarn sending device shown in FIG. 2. FIG.

FIG. 9 is a side view solution diagram showing a modified example of the main part of the warp yarn feeding device shown in FIG. 2;

FIG. 10 is an illustrative view showing a conventional warp yarn feeding device.

[Explanation of symbols]

 10 Warp thread feeding device 12 Base 14 Bearing 16 Shaft 18 Beam 20, 22 Gear 24 Chain 26 Shaft 28 Gearbox 30 Inverter motor 32 Power supply 34a, 34b Column member 36a, 36b Mounting side plate 38 Inverter box 40a, 40b Bearing plate 41a, 41b Bearings 42a, 42b Regulatory side plates 43a, 43b Regulatory holes 48 Measurement control box 50 Fixed rollers 54a, 54b Column members 56 Movable rollers 58 Shafts 60a, 60b Spring 62a, 62b, 64a, 64b Connection fittings 66a, 66b Holding members 68a, 68b Recesses 70a, 70b Supporting members 71a, 71b Through holes 72 Plate-like members 73a, 73b Adjusting screws 74 Strain gauges 76 Circuit boards 78 Tension detecting circuits 80 Filters 82 Integral amplification calculating circuits 4 tension monitor 86 tension setter 88 compares the control circuit 90 inverter circuit 92a, 92b springs 94a, 94b, 96a, 96b fittings 98a, 98b adjusting screw

Claims (4)

[Claims] 1. A motor for feeding a warp yarn wound and held by the motor to feed the warp yarn to a loom, a measuring unit for measuring a tension applied to the warp yarn fed by the motor, and the measuring unit. A warp yarn feeding device including a control unit for controlling the number of rotations of the motor according to the tension measured by the measuring unit, wherein the measuring unit changes the transport direction so as to wind the warp yarn, and A warp yarn feeding device including a movable roller that is displaced according to the tension applied to the warp yarn, a plate-shaped member that bends according to the displacement of the movable roller, and a detection unit that detects the deflection of the plate-shaped member. 2. An elastic body for urging the movable roller in a direction substantially opposite to a direction in which the warp yarn is transported.
The warp thread delivery device described in 1. 3. The warp yarn feeding device according to claim 1, further comprising a display unit for continuously displaying the tension measured by the measuring unit. 4. The control means is connected to a setting circuit for setting a tension as a reference, the setting circuit and the measuring means, and the set value set by the setting circuit and the measured value by the measuring means. A comparison circuit for comparing with a measured value, and connected to the comparison circuit and the motor, the frequency of the motor drive signal is changed according to the difference between the set value and the measured value, and the rotation speed of the motor. The warp yarn feeder according to any one of claims 1 to 3, further comprising an inverter circuit for changing the value of the warp yarn.