JPH10310949A - Loom having linear motor type opening device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a loom having linear motor type opening devices disposed so as to maintain the conventional pitches of heald frames. SOLUTION: An opening device comprises guide frames 5, heald frames 2 and linear motors 1. A loom is manufactured by arranging the opening devices in series. It is preferable that the mutual distances of the heald frames 2 are, if possible, small in consideration of the magnitudes of the vertical movements of the back disposed heald frames. Since the linear motors 1 are disposed so as to give thrusts for driving the heald frames 2, the reduction in the sizes of the linear motors 1 are limited. Thus, the linear motors are arranged at different shifted positions so that the linear motors of the adjacent opening device are not collided with each other. The opening devices are shifted from each other, or the widths of the heald frames 2 are changed from each other, thereby preventing the positions of the linear motors from overlapping each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loom having a plurality of linear motor-type shedding devices configured to keep the spacing between heald frames at a conventional value.

[0002]

2. Description of the Related Art The shedding motion of a heald frame in a conventional loom is performed by attaching a wire or the like to the heald frame and converting the power of a normal motor or the like into a vertical motion by a mechanical configuration. A cam or the like is used to convert the rotational motion of the motor or the like into a vertical motion with such a mechanical configuration, but once the vertical motion is adjusted, the control of the opening motion becomes fixed, and the weaving is performed by the loom. It is inconvenient that it is not easy to change the state of the opening movement when changing the type of fabric to be made.

[0003] Today, if the opening movement of the loom can be controlled electronically in response to the development of electronic control technology, the speed and timing of the vertical movement of the heald frame can be flexibly changed. And a loom which can easily cope with the woven fabric.

Therefore, it has been proposed that the heald frame of the loom is driven by a linear motor so that the shedding motion can be easily controlled. For details of such an opening device using a linear motor, see, for example, Japanese Patent Publication No. 4-70414.
No., published in Japanese Unexamined Patent Publication No. The opening device using the proposed linear motor will be described below.

FIG. 4 is a view for explaining a conventional linear motor drive type opening device. In FIG. 7A, linear motor movers 44-1 and 44-2 are provided on side stays 43-1 and 43-2 on both sides of the heald frame 42, respectively. In particular, the movers 44-1 and 44-2 are provided on the side surface facing the guide frames 41-1 and 41-2. The guide frames 41-1 and 41-2 are provided with grooves so that the heald frame 42 is fitted therein. A stator 45 is provided on the bottom surface at the back of the groove so as to face the movers 44-1 and 44-2 provided on the heald frame 42.
-1, 45-2 are provided. Stators 45-1, 4
In 5-2, a coil is provided to generate a magnetic field. Heel frame 42 side stay 43-
Mover 44-1, 44- attached to 1, 43-2
2 is aluminum.

When a current flows through the coils of the stators 45-1 and 45-2, an eddy current is generated in the movers 44-1 and 44-2, and the current of the coils is controlled to control the mover 44-1.
1, 44-2 receives a force, and the heald frame 42 moves up and down.

FIG. 1B is a view for explaining another embodiment of a conventional linear motor drive type opening device. Also in this embodiment, a heald frame 46 and guide frames 47-1 and 47-2, which are the basic structures as the opening device, are provided. Heel frame 46 side stay 43-
1 and 43-2 are the guide frames 47-1, 47
-2, so that it can be moved up and down.

The difference from the configuration shown in FIG. 1A is that a linear motor is not provided by providing a stator and a mover on the heald frame 46 and the guide frames 471 and 47-2, but by using a linear motor 48-1. 48-2.
The movers of the linear motors 48-1 and 48-2 are supporting legs 49.
-1, 49-2 attached to the linear motor 4
When 8-1 and 48-2 operate, the support legs 49-1 and 49-2
-2 is configured to move up and down. This support leg 4
By attaching the 9-1 and 49-2 to the heald frame 46, the heald frame 46 also moves up and down to perform an opening motion. Linear motor 4 in this case
8-1 and 48-2 are typically cylindrical linear motors.

[0009]

Generally, when weaving one woven fabric, the number of heald frames provided on a loom is four to sixteen. The reason why a plurality of heald frames are provided is to weave various patterns into the fabric. Also,
When weaving a wide fabric, the tension of the warp becomes large, so that the same set of warp is supported by two heald frames.

As described above, in an actual loom, it is necessary to use a plurality of heald frames side by side, and the gap between the heald frames is usually set to about 15 mm. In addition, the angle formed by the thread when the two heald frames move upward and downward, respectively, is 30 ° or more.
It is about 35 °. This angle is set so that the weft thread can pass easily because the weft thread needs to pass between the upper thread and the lower thread. When 16 heald frames are provided, the stroke of the foremost heald frame (width of up-and-down movement) is about 50 mm, and the stroke of the last heald frame is about 140 mm. However, when the stroke becomes 140 mm, the thrust of the motor driving the heald frame also reaches the limit, and if the stroke is further increased, the motor becomes unnecessarily large. If the gap (pitch) between the heald frames becomes wider, the stroke of the last heald frame becomes larger, and a motor with a large thrust is required, which is not practical.

Therefore, the pitch between the heald frames is 15
mm must be maintained. By the way, when the opening device is configured using the linear motor as described above, even if a linear motor dedicated to the opening device is developed, it is considered that the limit is to limit the thickness of the motor to 30 mm or more. If the pitch of the heald frame is increased to more than 30 mm according to the thickness of the linear motor, the last stroke of the plurality of heald frames is much larger than 140 mm, so a larger thrust and a larger linear motor are required. A vicious cycle occurs. Therefore, a configuration is required that can maintain the pitch of the heald frame at about 15 mm while using a linear motor having a thickness of 30 mm or more.

It is an object of the present invention to provide a loom having a linear motor shedding device configured to maintain the pitch of the heald frame as before.

[0013]

SUMMARY OF THE INVENTION The present invention relates to a loom having a structure in which a plurality of shedding devices having linear motors for driving a heald frame along a guide frame are arranged. The opening device is configured so that the motors do not contact each other.

Conventionally, in a loom having the above-described configuration, an opening device using a linear motor having a thickness equal to or larger than the interval where the opening device or the heald frame is disposed is used while maintaining the interval where the heald frame is disposed. Therefore, it is possible to realize a loom in which the control of the shedding motion is easier than before by taking advantage of the linear motor.

Further, since the spacing between the opening device and the heald frame can be maintained as before, the vertical movement stroke of the heald frame located at the rear end of the arranged heald frames can be minimized, and the linear motor of the linear motor can be maintained. The required thrust can be minimized.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram showing one embodiment of a method for arranging a heald frame according to the present invention. FIG.
The example of a structure when a heald frame is arranged diagonally is shown. In FIG. 1A, a heald frame 2 is mounted on a guide frame 5 so as to be vertically movable, and both ends of the heald frame 2 are movable elements 4 forming a linear motor.
Are provided, and constitute the linear motor 1 together with the stator 3 provided on the guide frame 5. The difference between the configuration of the linear motor shown in FIG. 4A and the configuration of the linear motor shown in FIG. 4A is that the front or back surface of the side stay is used as a working surface of the mover 4 of the linear motor. It is a point. With such a configuration, the working surface of the linear motor can be widened, so that the linear motor can be kept to a minimum size. However, even if such a configuration is adopted, it is considered that the limit of the thickness of the linear motor is 30 mm or more. In other words, the thrust of the linear motor is determined by the width of the working surface, and the thickness is not so related to the thrust, so it is thought that the linear motor can be made thinner. The magnetic field saturates in the yoke of the linear motor, the thrust decreases, and the iron loss increases due to the presence of hysteresis.
When the iron loss increases, the power efficiency of the linear motor decreases, and the linear motor has heat, which is not preferable.

In order to reduce the distance between the heald frames 2 to about 15 mm while using the linear motor 1 having a thickness of 30 mm or more, FIG. 5 are arranged so as to be shifted from each other. According to this configuration, since the linear motor 1 including the mover 4 and the stator 3 does not collide with each other, the interval between the heald frames 2 can be further reduced.

FIG. 2B shows another example in which linear motors are arranged so as not to collide with each other. In this case, the width of the heald frame 2 is different for each opening device. Even in this case, the linear motors 1 do not collide with each other.
Can be narrowed. However, in the case of FIG. 3B, since the width of the heald frame provided rearward is wider, the size of the linear motor that drives the heald frame tends to increase. Furthermore,
As the heald frame 2 is located at the rear, the up and down stroke becomes larger, so that it is necessary to make the extra linear motor have a larger thrust. Therefore, contrary to FIG. 3B, if the heald frame 2 on the front side is made wider and narrower toward the back, the stroke of the heald frame 2 having a wider width can be reduced. Therefore, the thrust required for the linear motor can be reduced.

FIG. 2C shows an example in which shed frames 2, guide frames 5 and linear motors 1 having opening devices having different widths are alternately arranged. According to the arrangement shown in FIG. 3C, an opening device having a plurality of heald frames 2 can be configured without increasing the width only by preparing two types of heald frames 2 having different widths.
That is, no matter how many heald frames 2 are used, the width of the opening device does not become larger than the width of the opening device having the larger width. In addition, since the width of the opening used for actually weaving the fabric does not change even if the number of heald frames 2 increases, the size of the heald frame 2 should be kept to a minimum size. Can be.

FIG. 2 is a view showing one embodiment of the arrangement method in the case of the opening device as shown in FIG. 4B. FIG. 4 (b)
Although two linear motors are mounted on one heald frame in FIG. 2, four linear motors are provided in FIG. As described above, by doubling the number of linear motors for driving one heald frame 11 from two to four, the thrust required for one linear motor is reduced to one half and the size is reduced to about two. It can be reduced by a factor of one. As described in FIG. 4B, the linear motor 14 is connected to the heald frame 11.
When driven to support from below, the heald frame 11 is mounted to be vertically slidable by a guide 13 provided on a guide frame 12. The mover 14b of the linear motor 14 is connected below the heald frame 11, and is configured to move up and down by a force received from the stator 14a.

As described above, the number of linear motors 14 attached to one heald frame 11 is increased to reduce the size of one linear motor 14 and to allow the heald frames 11 to be arranged close to each other. Then, the position of the linear motor 14 attached to the adjacent heald frame 11 is shifted. That is, the linear motor 14 drawn by a solid line in the front view of FIG. 2 is a linear motor that drives the frontmost heald frame 11, and the linear motor 16 drawn by a dotted line is the frontmost heald frame. It drives the heald frame immediately after 11. As is clear from FIG. 2, a linear motor 16 for driving the second heald frame is arranged so as to avoid the linear motor 14 for driving the foremost heald frame 11.

When two or more heald frames are arranged as described above, as shown in the side view, the second heald frame is located at a position avoiding the linear motor driving the foremost heald frame. And a linear motor that drives the third heald frame is located at a position avoiding the linear motor that drives the second heald frame. By repeating such an arrangement method, the heald frame interval 15 is reduced to about 15
Many heald frames can be arranged while keeping the mm.

FIG. 3 is a view showing a modified example of the method of arranging the linear motors of the linear motor type opening device having the structure shown in FIG. FIG. 1A shows a configuration in which linear motors 30-1 and 30-2 for driving a heald frame are provided above and below the heald frame. Also in this case, the linear motor driving the heald frame on the rear side is arranged so as to avoid the position of the linear motor on the near side. That is, as an example, the linear motors 31-1 and 31-2 drive the second heald frame, and
1, 32-2 drive the third heald frame.

As is apparent from the side view of FIG. 2A, the position of the linear motor driving the adjacent heald frame is determined so as to avoid the position of the linear motor driving the front heald frame, thereby forming the heald frame. Can be close to each other.

FIG. 2B shows an example of an opening device in which a configuration for driving the heald frame from below and a configuration for driving from above are alternately arranged. As is apparent from the side view of FIG.
3 is attached below, and a linear motor 34 is attached above the second heald frame.
In this manner, by alternately mounting the linear motors for driving the heald frames upward and downward, the linear motors for driving the adjacent heald frames do not collide with each other, and the heald frames can be brought closer to each other.

FIG. 2C shows a linear motor for driving adjacent heald frames. That is, the horizontal position of the linear motor 35 that drives the frontmost heald frame and the horizontal position of the linear motor 36 that drives the second heald frame with respect to the floor on which the shedding device or the loom including these shedding devices is provided. The position is shifted and the position is shifted in the height direction. As is apparent from the side view of FIG. With this arrangement, the linear motor can be driven at positions near both ends of the heald frame, so that the heald frame can be driven stably. In the case of FIG.
As in 2-2, there is a possibility that the position of the linear motor is located near the center of the heald frame. In this case, the heald frame having a large width must be driven only near the center, so that the stability is slightly higher. However, such a situation can be avoided in the configuration shown in FIG.

FIG. 2D shows an example of a configuration in which linear motors are provided above and below a heald frame and a zigzag arrangement is employed. That is, the frontmost heald frame is provided with linear motors 37-1 and 37-2 above and below, and is driven up and down. Linear motors 38-1 and 38-2 are provided on the heald frame provided behind them, and are configured to drive the heald frame up and down. Linear motors 38-1 and 38-2 are linear motors 37-1 and 37 that drive the front heald frame.
In addition to shifting the lateral position with respect to the floor surface so as not to hit -2, the position in the height direction is also shifted. By arranging in this manner, the linear motors can be prevented from hitting each other, so that the heald frames can be arranged close to each other. Also, FIG.
As in the case of (1), since the position of the linear motor can be arranged at a position near both ends of the heald frame, the heald frame can be driven stably.

[0028]

According to the present invention, in a linear motor type opening device, even if a linear motor, which tends to be relatively large, is used to drive a heald frame, the distance between a plurality of heald frames is conventionally reduced. Can be maintained at the same intervals.

Therefore, the stroke of the opening movement of the heald frame disposed at the rearmost position can be suppressed to the same level as in the conventional case, and the required thrust and size of the linear motor can be suppressed to the minimum.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of a heald frame arrangement method according to the present invention.

FIG. 2 is a view showing an embodiment of an arrangement method in the case of an opening device as shown in FIG. 4 (b).

FIG. 3 is a view showing a modified example of a linear motor arrangement method of the linear motor type opening device having the configuration shown in FIG. 2;

FIG. 4 is a view for explaining a conventional linear motor drive type opening device.

[Explanation of symbols]

1, 14, 16, 30-1, 30-2, 31-1, 31
-2, 32-1, 32-2, 33, 34, 35, 36,
37-1, 37-2, 38-1, 38-2, 48-1,
48-2 Linear motor 2, 11, 42, 46 Heald frame 3, 14a Stator 4, 14b Mover (side stay) 5, 12, 41-1, 41-2, 47-1, 47-2
Guide frame 13 Guide 15 Heald frame interval 43-1, 43-2 Side stay 44-1, 44-2 Mover 45-1, 45-2 Stator 49-1, 49-2 Support leg

Claims (7)

[Claims] 1. A loom having a configuration in which a plurality of shedding devices having linear motors for driving a heald frame along a guide frame are arranged, wherein the linear motors of the shedding devices adjacent at a predetermined interval do not contact each other. A loom comprising the shedding device. 2. A configuration in which a mover or a stator is provided on a side stay portion of the heald frame, and a stator or a mover is provided on the guide frame. 2. The loom according to claim 1, wherein the looms are arranged shifted in the horizontal direction. 3. A configuration in which a mover or a stator is provided on a side stay portion of the heald frame and a stator or a mover is provided on the guide frame. The loom according to claim 1, wherein the shedding devices are arranged. 4. In a configuration in which the linear motor is provided so as to support and drive the heald frame from above or below, when the opening devices are arranged, a plurality of the openings having different mounting positions of the linear motor are provided. The loom according to claim 1, wherein the devices are respectively arranged. 5. A configuration in which the linear motor is provided so as to support and drive the heald frame from above or below, and a difference in a mounting position of the linear motor is determined with respect to a floor on which the loom is disposed. The loom according to claim 4, wherein the difference is a difference in a horizontal position. 6. A structure in which the linear motor is provided so as to support and drive the heald frame from above or below, and a difference in a mounting position of the linear motor is caused by a difference in position with respect to a floor on which the loom is disposed. The loom according to claim 4, wherein the difference is a difference in position in the height direction. 7. The loom according to claim 1, wherein three or more linear motors are attached to one heald frame.