JPH1053938A - Warp tensioner and loom equipped therewith - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a warp tensioner needing no support beam extending throughout the crosswise direction of a web, free from any clearance at all so as to run extremely minute longitudinal actions of a tensioner element, with no need of surely running power transmission. SOLUTION: This warp tensioner has a tensioner element 3, at least one support element, and a survomotor 2. The rotor 6 of the survomotor 2 has a scheme serving as part of the support element or the tensioner element 3. The scheme affords a warp tensioner structure with low inertia and sets the actual value of warp tension based on motor current and the position of the tensioner element 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a warp in a loom having a tensioner element, at least one supporting element, and at least one servomotor supported on the supporting element and rotatable about the axis of the supporting element. It relates to a tension device.

[0002]

2. Description of the Related Art A warp tension device is disclosed in EP-EP-EP.
A-0 350 447. The warp tension device has a tensioner element, a support element, and a servomotor. The tensioner element is supported on the support element by a plurality of webs and is rotatable about the axis of the support element. The servomotor is drivingly connected to the support beam via a transmission.

[0003] The nature of the drive by the servomotor and the transmission necessitates the need for a support beam extending across the width of the web, and the transmission has no play due to the very small longitudinal movement of the tensioner element. And the like must be surely performed.

[0004]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a warp tension device which eliminates the above disadvantages.

[0005]

According to the invention, a servomotor is designed as a support element. Further, according to the present invention, the inertia is substantially low and the configuration is simple. A preferred embodiment of the present invention comprises a sensor for detecting the position of the tensioner element, which is integrated with the servomotor or connected as a separate element to the tensioner element. In one embodiment, the servomotor is a motor having an external rotor, and in another embodiment, the servomotor is a motor having an internal rotor. Further, in one embodiment, the tensioner element is supported by a rotor of the servomotor, and in another embodiment, the tensioner element is integrally formed with the rotor of the servomotor. Further, the tensioner element and the rotor in another embodiment are firmly connected. Furthermore, in one embodiment of the invention, at least two servomotors are arranged outside or inside the width of the loom.

The features of the loom equipped with the warp tension device of the present invention are as follows. A support member is mounted on a chassis of the loom, at least one bearing shield is attached to the support member, and a servomotor is mounted. Is to be.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to FIGS. The warp drawn from one or more warp beams in the loom reaches the shed forming member via the deflection beam and the warp tensioner 1.

As shown in FIGS. 1 to 3, the warp tensioner 1 has at least one driving device 2, one tensioner beam 3, and one web 4. The driving device 2 is a motor having an external rotor configured based on the principle of a long rotor. The web 4 is fixed to the rotor 6 of the motor by suitable means (not shown).
The tensioner beam 3 is connected to a web 4.

FIG. 2 explains the arrangement of the warp tensioner 1 in the loom. In this case, the support member 11 is arranged at a predetermined position on the loom. The warp tensioner 1 is mounted on a bearing shield or end plate 12 which is fixed to a support member 11 via a flange 13. The rotor 6 is supported by a bearing shield 12. For this reason,
A sliding or rolling bearing may be provided. The stator 15 of the motor is mounted on a support element 16 fixed to the support member 11.

In the embodiment shown in FIG. 3, a roller brace 18 instead of the web 4 is attached to the rotor 6. The roller brace 18 includes a plurality of freely rotatable rollers 19 for rotatably supporting the tensioner beam 3. This has an advantageous effect on certain types of yarn.

In the embodiment shown in FIG. 4, the tensioner element 21 and the rotor of the servomotor are integrally formed. As shown in FIGS. 1-4, the warp tensioner 1 is configured to have a very low inertia.

In the embodiment shown in FIG. 5, the warp tensioner 31 has a motor 32 with an internal rotor, a web 34 attached to a drive shaft 33, and a tensioner element 35 attached to the web 34. The warp tensioner 31 in the loom is arranged as shown in FIG. The number and embodiment of the warp tensioners 1, 31 are essentially affected by the web width or the warp tension, respectively.

In principle, the warp tensioners 1, 31 can be provided with a single drive. For this purpose, it is possible to provide a motor with an external rotor having a suitably set length (see FIGS. 1 to 4) or a motor with an internal rotor connected at one end to a tensioner element (see FIG. 5). It is advantageous. It is also possible to provide two motors with external rotors arranged respectively in the length direction of the tensioner element. Alternatively, two motors with internal rotors located at the ends of the tensioner beam may be provided. It is also possible to use three or more motors.

The path of the warp and the fabric is shown in FIG. 7 together with the necessary equipment and the control of the warp tensioner described above with two servomotors. The warp yarn 42 is drawn from the warp beam 41, reaches the shed forming device 44 via the deflection beam 43 and the warp tensioners 1 and 31, and passes through the reed 45. After the warp is beaten to the cloth edge 46, the cloth 47 passes through the deflection beam 49 by the cloth draw-off device 48, and reaches the cloth beam 50 where the cloth 47 is wound. The warp beam 41 is rotated by a warp delivery device having a warp delivery motor 55 and a control unit 56. The cloth 47 is advanced by a cloth delivery device having a cloth delivery motor 57 and a control unit 58. The first and second control units 56 and 58 are connected to the third control unit 60 by signal transmission, and together form a control system for the plurality of warp tensioners 1 and 31. The warp tensioners 1 and 31 are connected to a third control device or unit 60 by two driving devices 61 and
62. Further, a sensor 63 is provided for detecting the position of the warp tensioners 1 and 31, and is connected to a third control device or unit 60 by signal transmission. Sensor 63 preferably comprises a motor encoder with an internal or external zero setting.

In a conventional loom, the warp tension is controlled by the position of the warp tensioner, and the position of the warp tensioner is detected by a sensor. In this case, a change in the geometrical arrangement causes some fluctuation in the warp tension, and the tension is detected only in a partial area of the warp.

As shown in FIG. 7, the warp tension at each moment is set particularly effectively by the motor current and the position of the tensioner element detected by the position sensor 63. The average value of the warp tension is sent to the control unit 56 as a control value. The actual value of the warp tension is sent to the control unit 60 in order to effectively control the warp tension in the warp insertion cycle.

The device according to the embodiment comprises tensioner elements 3 and 3
1, having at least one support element and a servomotor 2. The rotor 6 of the servomotor 2 is each configured as part of a support element or a tensioner element. With this configuration, a configuration having low inertia is realized, and the actual value of the warp tension is set by the motor current and the positions of the tensioner elements 3 and 31.

[0018]

As described in detail above, according to the present invention, there is no need for a support beam extending across the width of the web, and there is no play in performing very small forward and backward movements of the tensioner element. It is possible to provide a warp tension device that does not need to perform transmission without transmission.

[Brief description of the drawings]

FIG. 1 is a diagram showing a preferred embodiment of the present invention.

FIG. 2 is a cross-sectional view showing an arrangement relationship of the device of FIG. 1 in a loom.

FIG. 3 is a sectional view showing an arrangement relationship in a loom regarding a first modified example of the apparatus in FIG. 1;

FIG. 4 is a sectional view showing an arrangement relationship in a loom regarding a second modified example of the device in FIG. 1;

FIG. 5 shows a further preferred embodiment of the present invention.

FIG. 6 is a sectional view showing an arrangement relationship of the device of FIG. 5 in a loom.

FIG. 7 shows the warp and weft paths and the control device for the device according to the invention.

[Explanation of symbols]

2, 32 servo motor, 3, 35 tensioner element, 6, 33 rotor, 11 support member, 12 support shield

Claims (9)

[Claims] A tensioner element (3), at least one support element, and at least one servomotor (2, 32) mounted on the support element and rotatable about an axis of the support element. In the warp tension device for a loom, the servo motor (2, 3
2) The warp tensioning device according to claim 2, wherein the rotor (6, 33) is configured as a part of the support element or the tensioner element (3). 2. A sensor (63) for detecting the position of the tensioner element, wherein the sensor (63) is formed integrally with the servomotor or connected to the tensioner element as a separate element. The warp tension device according to claim 1, wherein 3. The warp tensioning device according to claim 1, wherein the servo motor is a motor having an external rotor. 4. The warp tensioning device according to claim 1, wherein the servomotor (2) is a motor having an internal rotor. 5. The warp tensioning device according to claim 1, wherein the tensioner element is supported by the rotor of the servomotor. . 6. The warp tensioning device according to claim 1, wherein said tensioner element is formed integrally with said rotor of said servomotor. 7. The warp tensioning device according to claim 1, wherein the tensioner element (3, 35) and the rotor (6, 33) are firmly connected. . 8. The warp yarn according to claim 1, wherein at least two servomotors (2, 32) are arranged outside or inside the width of the loom. Tension device. 9. A deflection beam and one of claims 1 to 8.
In a loom equipped with a warp tension device according to the paragraph,
A support member (11) is mounted on the chassis of the loom and at least one bearing shield (12) is mounted on the support member (1).
1) and the servo motor (2, 3)
A loom equipped with 2).