JPH11107125A - Weft yarn-winding and trapping bobbin for loom - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decrease vibration phenomena of bobbins without bringing about cost-up. SOLUTION: Permanent magnets 6 for suppressing the rotation of a weft yarn-trapping bobbin is constructed so that it may develop the magnetic flux of a long and narrow cross section that is short along the periphery of the turning circle of the bobbin and is long along the radial direction of the bobbin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weft winding and storage device for a loom typified by a drum fixed weft storage device with a long unwinding device of a rapier loom or a fluid jet loom, for example. The present invention relates to a weft winding and storing device for a loom for winding and storing a weft supplied to a weft to a predetermined length around the outer periphery of a wound body.

[0002]

2. Description of the Related Art This type of weft winding and storing apparatus for a loom is configured to wind a weft supplied to a loom for a predetermined length such as 10 or 20 windings around the outer periphery of a wound body (drum or the like). The weft yarn wound around the outer periphery of the yarn winding body is stored, intermittently fed out using a rapier head or a jet output of a fluid such as air or water, and supplied to the loom.

As a method of winding a weft around the outer periphery of the wound body, a weft guide path for inserting the weft and guiding it to the vicinity of the outer periphery of the wound body is formed, for example, in a weft guide winding member formed of a cylindrical member. The weft is wound around the outer periphery of the bobbin by rotating the weft guide winding member relative to the bobbin while the weft is inserted in the weft guide path. The weft guide winding member is configured to be attached to a rotation shaft of a motor provided on a fixed member and to be rotated by rotation of the motor. The thread winding body is rotatably provided on a rotation shaft of the motor via, for example, a bearing or the like, and the weft guide winding member is configured to rotate between the thread winding body and the fixing member. Have been.

On the other hand, when a weft is wound around the outer periphery of a bobbin, the bobbin is mounted on a rotating motor shaft via a bearing. However, the bobbin rotates due to frictional resistance and cannot be wound. Therefore, the rotation of the wound body must be suppressed in some way. However, since the weft guide winding member is provided between the yarn winding body and the fixing member so as to be rotatable as described above,
The rotation cannot be prevented by directly fixing the bobbin to the fixed member side. Conventionally, a magnetic flux generating means such as a permanent magnet is provided between facing surfaces of the bobbin and the fixing member. The rotation of the bobbin is suppressed by force.

[0005]

On the other hand, in the past, the loom speed was about 600 to 800 revolutions / minute, but in recent years it has been increased to a high speed of about 1200 revolutions / minute. . As a result, when winding the weft, a drawback has been conspicuous that a vibration phenomenon occurs in which the wound body repeatedly rotates forward and backward within a small angle around the rotation axis.

When this vibration phenomenon occurs, there is a disadvantage that the tension of the weft changes when the weft is unwound.
Also, for example, in the case of a fluid jet loom, in order to measure the feeding length of the weft from the bobbin, a pin that is retracted by a solenoid or the like is inserted into or removed from a pin insertion hole on the outer periphery of the bobbin. It is configured.

However, when the above-described vibration phenomenon of the wound body occurs, unless the pin insertion hole is formed as a long hole along the circumferential direction of the wound body, the pin is hit and an accurate high-speed response operation is performed. I cannot do it. As a result, a large gap is formed on both sides of the pin due to the pin insertion hole, so that the weft is drawn out of the wound body through the large gap. In order to prevent this, the pin must be inserted deeper into the pin hole, so that the stroke of the solenoid becomes longer and the response speed becomes insufficient.

In order to solve such a drawback, a permanent magnet as an example of the above-described magnetic flux generating means has been constructed by a stronger neodymium boron iron magnet instead of the conventional samarium cobalt magnet. However, even with such a configuration, the vibration phenomenon of the thread wound body could not be sufficiently suppressed.

In view of this, it is conceivable to increase the number of magnets described above to increase the magnetic force for suppressing the vibration of the thread wound body. However, such a configuration increases the cost. There is a new drawback of getting stuck.

[0010] Therefore, as a result of intensive research to make it possible to sufficiently suppress the above-mentioned vibration phenomenon of the thread wound body without incurring an increase in cost, the reason that the vibration phenomenon of the thread wound body cannot be sufficiently suppressed is that the magnetic flux generation. It was found that the means was in the cross-sectional shape of the generated magnetic flux.

That is, the conventional magnetic flux generating means is constituted by, for example, a cylindrical or fan-shaped permanent magnet 6 shown in FIG. 8 and generates a magnetic flux having a circular or fan-shaped cross section. The pulling-back force with respect to the deviation angle of the two magnets is weakened. For this reason, the amplitude of the vibration of the bobbin becomes relatively large, and it takes a relatively long time to attenuate the vibration. In FIG. 8, reference numeral 5 denotes a drum mounting body, and reference numeral 38 denotes a yoke.

The present invention is a completely novel invention that has been conceived based on a new finding that the cause of insufficient suppression of the vibration phenomenon of the bobbin is the cross-sectional shape of the magnetic flux generated by the magnetic flux generating means. The purpose is to reduce the vibration phenomenon of the wound body without increasing the cost.

[0013]

According to the present invention, there is provided a weft winding and storing apparatus for a loom for winding and storing a weft to be supplied to a loom around a predetermined length of a part of a wound yarn body. A fixing member for rotatably supporting the bobbin; and a magnetic flux generated between facing portions of the fixing member and the bobbin to suppress rotation of the bobbin due to the magnetic force. A magnetic flux generating means for generating a magnetic flux having a long and narrow cross-sectional shape that is short along the rotation circumferential direction of the bobbin and long along the radial direction of the bobbin. It is characterized by comprising.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, a pin insertion hole formed at a predetermined location on the outer periphery of the thread winding body, and the pin insertion hole is inserted into the pin insertion hole. And an electric drive source for inserting and removing a possible pin from the pin insertion hole, wherein the pin can be pulled out from the pin insertion hole and the weft wound around the yarn winding body can be fed out and supplied. In this state, the pin is inserted into the pin insertion hole, and the weft wound around the outer periphery of the yarn winding body is prevented by the pin.

[0015]

According to the first aspect of the present invention, the rotation of the bobbin is suppressed by the magnetic force of the magnetic flux generated by the magnetic flux generating means provided between the fixing member and the facing portion of the bobbin.
Then, the magnetic flux generating means generates a magnetic flux having a long and thin cross-sectional shape that is short along the rotation circumferential direction of the bobbin and long along the radial direction of the bobbin.

According to the second aspect of the present invention, in addition to the function of the first aspect of the present invention, a pin insertion drilled at a predetermined position on the outer periphery of the yarn winding body by the action of the electric drive source. The pin can be inserted into and removed from the hole. Then, with the pin pulled out of the pin insertion hole, the weft wound on the outer periphery of the yarn winding body is fed out and becomes a supplyable yarn feeding state. With the pin inserted into the pin insertion hole, the outer periphery of the yarn winding body is wound. Is stopped by a pin to prevent the weft from being wound around.

[0017]

Next, an embodiment of the present invention will be described with reference to the drawings.

FIGS. 1A and 1B are a sectional view and a front view showing an example of a weft winding and storing device for a loom according to the present invention. The weft winding storage device for a loom has a fixing member 30
The motor 3 is provided to rotate the inclined rotary arm 4. The drum mounting member 5 as an example of a support is provided on the rotating shaft 31 of the motor 3 via a bearing 32. The drum mounting body 5 has an S pole of the magnet 7 mounted on the fixing member 30 and an N pole of the magnet 6 provided on the drum mounting body 5 side.
It is configured not to rotate due to the attraction force with the poles.
That is, the rotation of the rotating arm 4 is relatively rotated (relatively rotated) with respect to the drum mounting body 5 by driving the motor 3. The drum mounting member 5 is provided with a drum component 8.
The drum constituent member 8 may be a conventionally known pin type in which a plurality of rod-shaped members are arranged in a circle, or may be a roll type in which a plurality of rotating rolls are arranged in a circular shape. By the drum constituent member 8 and the drum mounting body 5,
A bobbin is constituted.

The rotary arm 4 is provided with a pipe member 12. Both the weft guide path formed in the rotary arm 4 and the weft guide path formed in the pipe member 12 are in communication with each other. The members are connected and fixed.

The weft 2 inserted into the weft insertion hole 1 passes through a rotating arm 4 having an inclination of about 45 ° passing through the axis of the motor 3.
Through the inside of the pipe member 12 to the guide path outlet 23 formed at the tip. In FIG. 1, reference numeral 13 denotes a balancer having the same mass and the same shape and size as those of the rotary arm 4 and the pipe member 12, and is used for achieving dynamic balance during rotation.

As the pipe member 12 is rotated by the motor 3, the weft 2 sent from the tip of the pipe member 12 is wound around the outer periphery of the drum component 8. The weft sufficiently wound by the rotation of the pipe member 12 is attached to a pin 1 of a solenoid 9 installed on the tip side of the drum constituent member 8.
At 0, the unwinding is locked, and is passed through the nozzle through the guide of the weft insertion port of the loom, and the state is a standby state for performing the weft insertion of the loom together with the fluid ejection of the nozzle. When the loom is started, the pin 10 of the solenoid 9 that has locked the weft is pulled out immediately before the weft is injected from the nozzle. Immediately after that, the unwinding of the weft wound and stored around the outer periphery of the drum component 8 starts. This unwinding number is counted by the photoelectric sensor 11 located immediately after the solenoid pin 10 on the weft unwinding side. When the circumference of the drum is 50 cm, the count is unwound by 3 counts. If the solenoid pin 10 is again inserted into the pin insertion hole 39 formed in the outer peripheral surface of the drum by the 4th count, the weft is wound into three turns of 50 cm. That is, it is pulled out 1.5 m and inserted into the loom.

FIG. 2 is a front view for explaining the permanent magnet provided on the drum mounting body 5. As shown in FIG.

The yoke 38 is provided at five places on the drum mounting body 5 facing the fixing member. Permanent magnets 6 are attached to left and right portions of each of the yokes 38. Similarly, yokes 38 are provided at five places of the fixing member 30 facing the drum mounting body 5.
A pair of permanent magnets 7 are mounted on the left and right sides.

FIG. 3 is an exploded perspective view of the yoke 38 and the permanent magnet 6. The permanent magnet 6 is locked and held by a plate-like iron yoke 38.

FIG. 4 is an explanatory diagram for explaining a state in which a loop of a magnetic circuit is formed by the permanent magnet on the drum mounting body 5 side and the permanent magnet on the fixing member 30 side.

The pair of permanent magnets 6 provided on the drum mounting body 5 are arranged such that the polarity of one permanent magnet on the yoke 38 side is S and the polarity of the other permanent magnet 6 on the yoke 38 side is N. They are attached to the yoke 38 so that they have different polarities. Similarly, the permanent magnet 7 attached to the fixing member 30 is also provided so that the polarities of the yoke 38 are different from each other.

The permanent magnets 6, 7 facing each other are provided so that the facing polarities thereof are different from each other.

As a result, as shown in FIG.
And a pair of permanent magnets 6 and a yoke 38 provided thereon.
And a pair of permanent magnets 7 provided therein constitute a magnetic circuit loop 41.

As described above, since the loop of the magnetic circuit extends over the drum mounting member 5 side and the fixing member 30 side, the magnetic force of the permanent magnets 6 and 7 is increased, and the drum mounting member 5 and the drum component member The force for suppressing the rotation of the bobbin formed by the thread 8 is increased.

The permanent magnets 6 and 7 are all of the same shape and the same size, and have a width of 10 mm, a length of 30 mm, and
The thickness is set to 4 mm. The permanent magnets 6 and 7 are neodymium boron iron magnets made of neodymium, boron and iron.

FIG. 5 shows the rotational displacement of the bobbin between the case where the conventional cylindrical permanent magnet shown in FIG. 8 is used and the case where the permanent magnet having the shape shown in FIGS. 2 and 3 is used. FIG. 6 is a diagram illustrating a graph showing a difference between the two. The horizontal axis of this graph indicates the weight of the weight, and the vertical axis indicates the displacement. A pair of left and right permanent magnets 6 are provided along the circumference of the bobbin having a radius R of 80 mm, that is, five pairs, that is, ten pairs. The permanent magnets were provided, and in this state, the displacement of the outer peripheral portion of the bobbin when the weight was suspended as shown in FIG. 5A was measured. The magnetic strength and weight of the permanent magnet are the same.

As shown in FIG. 5 (a), the displacement is reduced to almost one half by using the elongated magnet shown in FIG. 3 rather than using the columnar magnet.

FIG. 5B shows a case where a 1.85 kg weight is dropped from a predetermined height to instantaneously generate a rotational moment in the bobbin under the same conditions as in FIG. 5A. The vibration along the rotation direction of the bobbin is shown. The solid line is the case where the rectangular permanent magnet of the present invention shown in FIGS. 2 and 3 is used, and the broken line is the case where the conventional circular permanent magnet of FIG. 8 is used. As described above, when the circular permanent magnet is used, the amplitude is large and it takes a long time to attenuate. On the other hand, when the rectangular permanent magnet of the present invention is used, the amplitude is extremely small and early. Decay.

FIG. 6 is an explanatory diagram for explaining the reason why the difference shown in FIG. 5 occurs. FIG. 6A shows a case where conventional circular permanent magnets 6 and 7 are used. Since the radius of the permanent magnets 6 and 7 is 10 mm, the area of the facing end is π10 ² ≒ 314 mm ² . In this state, the area indicated by hatching when the facing permanent magnets 6 and 7 are shifted laterally by 5 mm as shown in the figure is approximately 64 mm ² .

On the other hand, in the case of the rectangular permanent magnets 6 and 7 of the present invention shown in FIG. 6 (b), the area of the hatched portion when it is shifted laterally by 5 mm is about 157 mm ² . The area of the facing end of the permanent magnet of the present invention shown in FIG. 6B and the area of the facing end of the conventional permanent magnet shown in FIG. 6A are substantially the same. ing.

Thus, despite the lateral displacement of the same 5 mm, the circular type only produces a displacement of 64 mm ² , while the rectangular permanent magnet of the present invention has a displacement of 157 mm ² . Will occur. Since the force for returning the displacement increases in proportion to the difference in the area, the difference in displacement, amplitude, and the like shown in FIG. 5 occurs.

FIG. 7 is a diagram showing another embodiment.
Instead of the rectangular permanent magnet 6 shown in FIG.
A plurality (four in the drawing) of permanent magnets 6 of approximately the same size are provided along the radial direction of the bobbin. Just like this, a similar permanent magnet is similarly provided on the fixing member 30 side.

That is, the term "magnetic flux having a long and thin cross-sectional shape which is short along the rotation circumferential direction of the bobbin and long along the radial direction of the bobbin" in the present invention means a small permanent magnet as shown in FIG. This is a broad concept including a case where a plurality of magnets are provided along the radial direction.

[0039]

Specific Examples of Means for Solving the Problems The permanent magnets 6, 7, and the yoke 38 shown in FIG. 3, FIG. 4 or FIG. A magnetic flux generating means for generating the magnetic force and suppressing the rotation of the thread wound body by the magnetic force is configured. As described above, the magnetic flux generating means is configured to generate a magnetic flux having a long and narrow cross-sectional shape that is short along the rotation circumferential direction of the bobbin and long along the radial direction of the bobbin. Have been. The elongated cross-sectional shape is a shape that satisfies “radial dimension> circumferential dimension”. In addition, the shorter the length of the wound body in the circumferential direction of rotation, the smaller the amplitude at the time of the occurrence of the vibration phenomenon of the wound body has the advantage. However, if the length is too short, the facing accuracy when mounting the magnet is reduced. However, there is a disadvantage that the magnet becomes difficult and the magnet is easily broken. Therefore, it is desirable to design a length dimension of the magnetic flux generated by the magnetic flux generating means along the circumferential direction of the bobbin winding by comparing the advantages and disadvantages. It is preferable that the length dimension along the rotation circumferential direction of the thread winding body is less than 20 mm and 3 mm or more. More preferably, 10
mm and 5 mm or more.

The length of the magnetic flux generated by the magnetic generating means along the radial direction of the bobbin winding is such that the longer the length, the greater the amount of magnetic flux and the greater the magnetic force. Since the rotational moment of the deterrent that suppresses the rotation of the bobbin becomes weaker as it gets closer, the effect becomes less effective. In consideration of this, it is necessary to design the length of the magnetic flux generated by the magnetic flux generating means in the radial direction of the bobbin. Preferably, it is less than 50 mm and not less than 20 mm. More preferably, less than 40 mm and 30 m
m or more is desirable.

[0041]

According to the first aspect of the present invention, the magnetic flux generated by the magnetic flux generating means is short along the rotation circumferential direction of the bobbin and long along the radial direction of the bobbin. Since it is configured to have a long narrow cross-sectional shape, it is possible to reduce the vibration phenomenon of the thread wound body without increasing the number of magnetic flux generating means, for example, and to reduce the vibration phenomenon without increasing the cost. It became possible to do.

According to the present invention described in claim 2, in addition to the effect of the invention described in claim 1, for example, in the case of a weft winding storage device used in a rapier type loom or the like, the yarn winding In order to minimize the amplitude at the time of the occurrence of the vibration phenomenon, the outside of the thread winding body is inserted into a pin insertion hole for inserting a pin for preventing or allowing the weft wound around the thread winding body. The dimension in the direction along the circumference can be reduced, and the inconvenience of the weft being drawn out of the pin even though the pin is inserted into the pin insertion hole and prevented from being fed out is prevented as much as possible. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a structural view showing an example of a weft winding and storing device for a loom.

FIG. 2 is a front view of a drum mounting body to which a permanent magnet is mounted.

FIG. 3 is an exploded perspective view showing a state where a permanent magnet is attached to a yoke.

FIG. 4 is an explanatory diagram showing a state in which a loop of a magnetic circuit is formed.

FIG. 5 is a graph showing a difference between the present invention and a case where a conventional permanent magnet is used.

FIG. 6 is a diagram for explaining a cause of a difference between the present invention and a conventional one.

FIG. 7 is a diagram showing another example of the magnetic flux generating means.

FIG. 8 is a front view of a conventional drum mounting body to which a permanent magnet is mounted.

[Explanation of symbols]

 2 Weft 3 Motor 30 Fixing member 5 Drum mounting body 8 Drum component 10 Pin 39 Pin insertion hole 6, 7 Permanent magnet 38 Yoke 9 Solenoid

[Procedure amendment]

[Submission date] January 29, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction contents]

[0013]

According to the present invention, there is provided a weft winding and storing apparatus for a loom for winding and storing a weft to be supplied to a loom around a predetermined length of a part of a wound yarn body. A fixing member for rotatably supporting the bobbin; and a magnetic flux generated between facing portions of the fixing member and the bobbin to suppress rotation of the bobbin due to the magnetic force. and a magnetic flux generating means for the magnetic flux generating means, said
From one of the fixing member side and the thread winding body side to the other
Cormorants flux, the longer the length fine cross section along the radial direction of short and the yarn winding body along the rotational circumferential direction of the yarn winding body
So as to be in front of the rotational displacement angle of the bobbin.
The ratio of the displacement area of the magnetic flux is increased .

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Deleted

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Deleted

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0041

[Correction method] Change

[Correction contents]

[0041]

According to the first aspect of the present invention, the magnetic flux generated by the magnetic flux generating means is short along the rotation circumferential direction of the bobbin and long along the radial direction of the bobbin. The thread-wound body is changed in rotation so as to have an elongated cross-sectional shape.
The ratio of the displacement area of the magnetic flux to the phase angle increases.
For this reason, for example, the vibration phenomenon of the thread wound body can be reduced without increasing the number of magnetic flux generating means, and the vibration phenomenon can be reduced without increasing the cost.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0042

[Correction method] Deleted

Claims (2)

[Claims] 1. A weft winding storage device for a loom for winding and storing a weft to be supplied to a loom around a predetermined length of a part of a yarn winding body, for rotatably supporting the yarn winding body. And a magnetic flux generating means for generating a magnetic flux between facing portions of the fixing member and the bobbin, and suppressing the rotation of the bobbin with the magnetic force, wherein the magnetic flux generating means comprises: A weft winding machine for a loom, characterized in that it is configured to generate a magnetic flux having a long and thin cross-sectional shape that is short along the rotation circumferential direction of the yarn winding body and long along the radial direction of the yarn winding body. With storage device. 2. A pin insertion hole formed at a predetermined position on the outer periphery of the thread winding body, and an electric drive source for inserting and removing a pin insertable into the pin insertion hole from the pin insertion hole. In the state in which the pin is pulled out of the pin insertion hole, the weft is wound around the outer periphery of the bobbin so that the weft can be fed and supplied, and the bobbin is wound in a state where the pin is inserted in the pin insertion hole. The weft winding and storage device for a weaving machine according to claim 1, wherein the weft winding and storage device for a weaving machine is in a blocking state in which the feeding of the weft wound around the outer periphery of the attachment is stopped by the pin.