JP2002211842A - Traverse device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a traverse device for preventing collision of a traverse guide with other members to be broken without requiring complicated control when a loss of synchronism of a drive motor occurs. SOLUTION: In a part of an outer circumference of a drive pulley 6 having plural teeth 61 along an outer circumferential surface, a non-engagement part 62 to release engagement of the drive pulley 6 with a timing belt 2 is formed. When the loss of synchronism of the drive motor 5 occurs, teeth 21 in the timing belt 2 are brought to get in contact with the non-engagement part 62, so that engagement of the drive pulley 6 with the timing belt 2 is released to prevent overrun of the traverse guide 4 from a normal range. For setting weight of the drive pulley 6 light, the drive pulley 6 is formed of resin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive wheel and a drive belt having a plurality of teeth formed along an outer peripheral surface thereof. The present invention relates to a traverse device that traverses a yarn by reciprocating a traverse guide attached to a drive belt body by performing reverse driving.

[0002]

2. Description of the Related Art As a traverse device for winding a yarn around a winding package which rotates in contact with a rotary drum, there is known a traverse device which reciprocates a traverse guide to traverse the yarn. A traverse device of this type performs a traverse of a yarn by reciprocating a traverse guide attached to the drive belt body by driving a drive belt body, for example, a timing belt with teeth, in a forward or reverse direction. It has been known.

In the case of the above traverse device, a drive belt (pulley) having teeth formed on the entire outer periphery and a timing belt wound around a guide wheel (pulley) are rotated every time a motor connected to the drive wheel is rotated a plurality of times. In this case, the traverse guide attached to the drive belt body is reciprocated to perform the traverse of the yarn.

[0004]

In the above traverse device, for example, it is assumed that a drive motor uses a stepping motor and is of an open loop control type. In this case, an excessive load is applied when the above-mentioned motor is reversed in order to turn the traverse guide, etc., so that the magnetic force between the rotor in the drive motor and the stator arranged at an interval around the outer periphery of the rotor is increased. It is conceivable that the engagement relationship is shifted (this is called a step-out phenomenon).

When the step-out occurs, the drive belt member and the traverse guide reciprocate by sliding from the normal reciprocating range by the displacement. Therefore, the traverse guide deviates from the normal traverse range and overruns, which results in abnormal traverse operation.

Here, depending on the degree of the deviation, each time the traverse guide repeats the reciprocating motion, it may collide with other members around the guide pulley or the like and damage the traverse guide.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a traverse device which prevents a traverse guide from colliding with another member and being damaged without complicated control when a drive motor loses synchronism. The purpose is to provide.

[0008]

In order to achieve the above object, according to the first aspect of the present invention, a drive wheel and a guide wheel each having a plurality of teeth formed along an outer peripheral surface thereof are engaged with each other so as to be driven. In a traverse device that traverses a yarn by reciprocating a traverse guide attached to a drive belt body by driving a drive belt body wound around a wheel and a guide wheel forward and reverse by a drive motor. It is characterized in that a means for releasing the engagement between the drive wheel and the drive belt body is sometimes provided. According to the present invention, when the step-out occurs, the engagement between the drive wheel and the drive belt body is released, so that the drive wheel can prevent the traverse guide from moving out of the traverse range. Alternatively, even if the traverse guide slightly deviates from the traverse range and collides with another member or the like, the impact at the time of the collision can be reduced.

According to a second aspect of the present invention, the driving belt and the driving belt body wound around the driving wheel and the guiding wheel are engaged with the driving wheel and the guiding wheel having a plurality of teeth formed along the outer peripheral surface. In a traverse device that traverses a yarn by reciprocating a traverse guide attached to a drive belt body by performing forward and reverse drive by a motor, the drive belt body engages with the outer peripheral surface of the drive wheel. And a non-engagement portion where the tooth is missing is formed, and when the forward / reverse drive range of the drive wheel deviates from the normal range, the engagement portion exceeds the end of the engagement portion. And the non-engagement portion is configured to contact the drive belt body. According to the present invention, when the forward / reverse drive range of the drive wheel deviates from the normal range due to the step-out of the drive motor, the non-engagement portion touches the drive belt body beyond the end of the engagement portion, so that the drive wheel Can cause slippage between the non-engaged portion and the drive belt member, thereby releasing the engagement relationship between the drive wheels and the drive belt member.

According to a third aspect of the present invention, a drive belt and a drive belt body wound around the drive wheel and the guide wheel are engaged with the drive wheel and the guide wheel having a plurality of teeth formed along the outer peripheral surface. In a traverse device that traverses a yarn by reciprocating a traverse guide attached to a drive belt body by performing forward and reverse drive by a motor, the drive belt body engages with the outer peripheral surface of the drive wheel. And a non-engagement portion where the teeth are removed. During normal traverse, the engagement between the engagement portion of the drive wheel and the drive belt body causes the engagement of the drive wheel. The drive belt body is driven forward and reverse with the forward and reverse drive, and when the forward and reverse drive range of the drive wheel deviates from the normal range, the non-engagement portion of the drive wheel is slipped with the drive belt body. It is characterized by causing it to occur. According to the present invention, when the forward / reverse drive range of the drive wheel deviates from the normal range due to the step-out of the drive motor, the non-engagement portion of the drive wheel is caused to slip between the drive belt body and the drive wheel. And the driving belt body can be released from the engagement relationship.

According to a fourth aspect of the present invention, the driving wheel and the driving wheel having a plurality of teeth formed along the outer peripheral surface are engaged with the driving wheel and the driving belt body wound around the driving wheel. In a traverse device that traverses a yarn by reciprocating a traverse guide attached to a drive belt body by forward / reverse driving by a motor, an outer peripheral surface of a portion of the drive wheel outer peripheral surface where teeth are formed. The length is almost the same as the width of the traverse range, and a non-engagement portion for causing a slip between the drive wheel and the drive belt body is formed on a part of the outer periphery of the drive wheel. I have.
In the present invention, the cycle of the reversal of the drive wheels is set to less than one rotation,
During a normal traverse, the drive belt body is prevented from coming into contact with the surface from which the engagement state is released. When a step-out occurs, a drive belt is provided on a non-engagement portion formed on a part of the outer periphery of the drive wheel when the traverse guide exceeds the end of the normal range, for releasing the engagement state between the drive wheel and the drive belt body. If the members are brought into contact with each other, a slip occurs between the drive belt member and the drive wheels in the non-engagement portion, and further movement of the drive belt member, that is, the traverse guide is suppressed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings, but the present invention is not limited to the embodiments unless it departs from the gist of the present invention.

FIG. 1 is a front view showing a traverse device 1 according to an embodiment of the present invention. FIG. 2 is a diagram for explaining the principle of the stepping motor (drive motor 5). FIGS. 3 to 5 are front views showing the operation of the traverse device 1 after the step-out of the drive motor 5 has occurred.

As shown in FIG. 1, the traverse device 1 traverses the yarn Y by reciprocating the traverse guide 4 attached to the timing belt 2 by driving the endless timing belt 2 forward and backward. And a drive motor 5 for driving the timing belt 2 forward and backward.
And a motor drive circuit 50 for driving the drive motor 5, and a control unit 54 for controlling the forward / reverse drive of the drive motor 5 via the motor drive circuit 50.

Here, the drive motor 5 uses a stepping motor, and the control system is an open loop control system. As shown in FIG. 2, the structure of the stepping motor (drive motor 5) includes a rotor 52 supported by a shaft 51 at the center and constituted by two permanent magnets of N and S poles, and four protrusions. There are provided stators 53a to 53d, each of which has coils L1 to L4 wound thereon and serves as an electromagnet, and are arranged with an interval therebetween. The operation is such that the control unit 54 outputs a step signal (pulse) for control and switches the direction of the current flowing through the coils L1 to L4 via the drive circuit 50, thereby changing the magnetic flux and rotating the rotor (forward / reverse inversion). (Including driving).

Returning to FIG. 1, the timing belt 2 has teeth 21 formed on the entire inner surface thereof so as to engage with teeth 61, 71, 81 formed on the outer periphery of the driving pulley 6, guide pulleys 7, 8. , Driving pulley 6 and guide pulleys 7 and 8. The engagement between the timing belt 2 and the drive pulley 6 defines the relationship between them, and the forward / reverse rotation control of the drive pulley 6 (drive motor 5) enables accurate position and / or speed control of the traverse guide 4. Becomes

Here, the outer periphery of the driving pulley 6 is an engaging portion in which teeth 61 which can be engaged with the timing belt 2 are continuously formed, and a part of the outer periphery of the driving pulley 6 excluding the engaging portion. When the teeth 61 are missing (the teeth 61 are not formed), an arc-shaped non-engaging portion 6 that constitutes means for releasing the engagement relationship between the drive pulley 6 and the timing belt 2 at the time of step-out described later.
2 exists. The length of the circumference of the portion where the teeth 61 are formed, that is, the distance on the outer circumference between the end portions 61a and 61b where the teeth 61 are formed, as shown in the drawing, the reciprocation of the traverse guide 4 during normal traverse. The width is substantially equal to a width L of a traverse range (normal range) described later. Therefore, the drive motor 5 rotates within less than one rotation and within an angle range in which the teeth 61 of the drive pulley 6 are formed, and drives forward and backward. At the beginning of winding of the yarn Y, the end portion 61a
When the teeth 21 of the timing belt 2 are engaged with the traverse guide 4, the traverse guide 4 turns from left to right, and when the end 61b and the teeth 21 of the timing belt 2 are engaged, the traverse guide 4 is turned rightward. Then, the motor is turned to the left and driven in reverse. Although the non-engagement portion 62 has an arc shape in the present embodiment, it may have irregularities such that the non-engagement portion 62 does not engage with the teeth 21 of the timing belt 2 (to the extent that slip occurs). Further, by making the non-engaging portion 62 shorter than the engaging portion, the circumferential length of the driving pulley 6 is shortened,
That is, the diameter of the driving pulley 6 can be reduced.

Further, the driving pulley 6 is formed of a resin having a specific gravity smaller than that of a metal. This is the driving pulley 6
The drive pulley 6 having a large diameter is required as compared with the case where the traverse guide 4 is moved one-way by rotating a plurality of times, and the outer peripheral length of the drive pulley 6 needs to be longer than the width L of the traverse range. Therefore, the use of the large-diameter drive pulley 6 is inevitable. in this way,
If the drive pulley 6 itself is made lightweight, the inertia of the drive pulley 6 during the reverse drive of the drive motor 5 can be suppressed. However, in addition to this embodiment, the drive pulley 6 can be made a hollow cylinder or made thinner to reduce the weight.

A substantially rectangular linear guide 9 is provided between the guide pulleys 7 and 8 along the inner surface of the timing belt 2. The linear guide 9 is for guiding the traverse guide 4 along the traverse direction. or,
The guide pulleys 7 and 8 are arranged at intervals slightly larger than the width L of the traverse range.
Reciprocates between the guide pulleys 7 and 8.

FIG. 1 shows an example of an operation state of the traverse device 1. In FIG. 1, a yarn Y supplied from a yarn feeding bobbin (not shown) via a yarn feed roller is fed by the traverse device 1 in the left-right direction of FIG. 10 shows a state in which the bobbin 10 is wound around the bobbin 10 while traversing in the axial direction.
The bobbin 10 is located at the center of the winding package P, and the winding package P is formed by winding the yarn Y on the bobbin 10. The position O is the center of the traverse.

The take-up package P is rotated by the rotation of the rotary drum 13 in contact with the rotary drum 13 driven by the rotary drum drive motor 12.

Reference numeral 14 denotes a cradle.
4 is for supporting the winding package P rotatably.

In the case of a false twisting machine, the winding package P is a tapered end package in which both ends in the axial direction are inclined as shown in the figure. This can be manufactured by controlling the drive motor 5 so that the traverse width is gradually narrowed (the reversal direction is gradually turned inward) as the winding progresses. When the winding package P has a tapered end as in this embodiment, the forward / reverse driving range of the driving pulley 6 is gradually narrowed so that the reciprocating range of the traverse guide 4 is gradually narrowed. Therefore, the driving pulley 6
The outer peripheral length of the engaging portion on which the teeth 61 are formed is substantially the same as the width L of the forward / reverse drive range at the time of normal traverse at the start of winding, where the width of the forward / reverse drive range is the maximum. L
Is the width of the traverse range (normal range).

The present invention relates to, for example, a partially drawn yarn (POY)
Twisting (giving crimpability) to multifilament yarns such as
To a false twisting machine for winding. Usually, as described above, in the false twisting machine, the traverse width is gradually reduced as the winding progresses, and a tapered end package is manufactured. Here, the traverse device 4 of the present embodiment forms the tapered end package P. However, the traverse device 4 can be applied to the manufacture of a cylindrical cheese-type package, and is not limited to a false twisting machine. The present invention can be applied to various winding machines including a winding machine, an automatic winder, a spinning machine (spinning machine), and a multiple twisting machine. The width L of the traverse range in this case is constant irrespective of the progress of winding.

As shown in FIG. 1, the control system of the drive motor 5 includes a drive circuit 50 and a control unit 54. The control unit 54 transmits a step signal for driving the drive motor 5 to the drive circuit 50. Output. In the case of a stepping motor, the rotation angle of the drive motor 5 is proportional to the number of steps (number of pulses) of the step signal, and the rotation speed is proportional to the frequency of the step signal.

In forming the tapered end package P as shown in the figure, the control unit 54 reverses the drive motor 5 every predetermined number of steps, and during this reversal (the drive motor 5 moves in one direction). The number of steps output during the rotation) is reduced in accordance with the progress of winding.

During the traversing operation of the yarn Y of the traverse device 1 by the control unit 54, for example, when the rotation direction of the drive belt body 2 is reversed, the direction of the traverse guide 4 is suddenly changed, and the inertia of the drive pulley 6 is changed. The effects will appear,
If an excessive load is applied to the movement of the traverse guide 4 due to winding of the yarn Y to be wound, or the like, the magnetic engagement relationship between the rotor 52 and the stator 53 changes in the drive motor 5 in FIG. Symptoms may occur. At this time, the forward / reverse drive range of the drive pulley 6 deviates from the normal range.

For example, as shown in FIG.
Assuming that step-out of the drive motor 5 occurs when the traverse range is reversed at the right end of the drawing immediately after the start of winding into the rotor 53, the rotor 52 follows a change in current (change in magnetic flux) due to a step signal on the stator 53 side. If not, the reversal will be delayed. Since the rotor 52 is engaged with the drive pulley 6 and the traverse guide 4 is engaged with the drive pulley 6 via the timing belt 2, the traverse guide 4 is engaged with the rotor 52, Therefore, the traverse guide 4 is stagnated at the position of the traverse guide 4 in FIG. 3 and the reversal timing is delayed.

Therefore, when the traverse guide 4 moves leftward in FIG. 3 while the drive motor 5 is out of synchronization, and the traverse guide 4 is reversed from left to right, as shown in FIG. The reversal occurs on the right side of the normal reversal position by the amount of the delay. During normal reversal, the reversal occurs when the end 61a of the portion where the teeth 61 on the outer periphery of the drive pulley are formed and the teeth 21 of the timing belt 2 are engaged.
As shown in the figure, it is inverted at a point in front of the end 61a by the distance A.

Therefore, when the traverse guide 4 moves rightward, as shown in FIG. 5, the outer periphery of the drive pulley 6 overruns by the distance A beyond the end 61b of the portion where the teeth 61 are formed. The timing belt 2 contacts the non-engaging portion 62 by the distance A. Then, the contact portion of the timing belt 2 with the teeth 21 is moved to the end 61 of the drive pulley 6.
b, the drive pulley 6 and the timing belt 2
Is released, a slip occurs, and despite the clockwise rotation of the drive pulley 6 in the drawing,
The timing belt 2 (traverse guide 4) does not travel to the right any further, or travels to the right more than that.

Therefore, as shown in the figure, even if a sensor for detecting that the traverse guide 4 has deviated from the traverse range is not provided, the traverse guide 4 stagnates at the right end of the traverse range. Prevent run. The case where the drive motor 5 loses synchronism at the left turn point of the traverse is the same as the case where the drive motor 5 loses synchronization at the right turn point of the traverse.

It is assumed that the non-engaging portion 62 and the timing belt 2
As described above, even if the traverse guide 4 is sent to the right side of the traverse range due to some friction with the traverse guide 4 and collides with a peripheral member such as the guide pulley 8, the driving pulley 6 and the timing belt 2 Since the mating relationship has been released, the impact is kept small, and the further rightward movement of the traverse guide 4 is prevented by the peripheral member. Therefore, the traverse guide 4
Can be prevented from getting caught in peripheral members such as the guide pulleys 7 and 8 and causing damage to each other. Also, the linear guide 9
If a stopper for regulating the movement range of the traverse guide 4 is provided at both ends of the traverse guide 4, a collision with the stopper may be considered, but the impact can be reduced.

Accordingly, even if the traverse guide 4 overruns beyond the end of the normal traverse range at the time of step-out, the traverse guide 4 and the like may be damaged by contact with the guide pulleys 7 and 8. Can be prevented.

[0034]

The present invention is configured as described above.
The following effects are obtained.

According to the first aspect of the invention, the drive belt and the drive belt body are engaged with the drive wheel and the guide wheel having a plurality of teeth formed along the outer peripheral surface, and are wound around the drive wheel and the guide wheel. In a traverse device that traverses a yarn by reciprocating a traverse guide attached to a drive belt body by driving the drive belt forward and reverse by a drive motor, the engagement relationship between the drive wheels and the drive belt body during step-out Is provided, it is possible to prevent the traverse guide from being damaged by collision with peripheral members.

According to the second aspect of the present invention, the driving belt body is engaged with the driving wheel and the guide wheel having a plurality of teeth formed along the outer peripheral surface, and is wound around the driving wheel and the guide wheel. In a traverse device that traverses a yarn by reciprocating a traverse guide attached to a drive belt body by driving the drive belt forward and reverse by a drive motor, a drive belt body is engaged with an outer peripheral surface of the drive wheel. An engaging portion formed with teeth for engagement and a non-engaging portion having the teeth missing are formed, and when the forward / reverse driving range of the drive wheel deviates from the normal range, the end portion of the engaging portion is formed. When the step-out occurs, the non-engagement portion is configured to contact the drive belt body beyond
Without providing a sensor for detecting that the traverse guide has deviated from the normal traverse range, it is possible to prevent the traverse guide from being damaged by collision with peripheral members.

According to the third aspect of the present invention, the drive belt and the drive belt body are engaged with the drive wheel and the guide wheel having a plurality of teeth formed along the outer peripheral surface, and are wound around the drive wheel and the guide wheel. In a traverse device that traverses a yarn by reciprocating a traverse guide attached to a drive belt body by driving the drive belt forward and reverse by a drive motor, a drive belt body is engaged with an outer peripheral surface of the drive wheel. An engagement portion formed with teeth for engagement and a non-engagement portion with the teeth missing are formed, and during normal traverse, the drive portion is driven by engagement between the engagement portion of the drive wheel and the drive belt body. The drive belt body is driven forward / reverse with the forward / reverse drive of the wheel, and when the forward / reverse drive range of the drive wheel deviates from the normal range, the non-engagement portion of the drive wheel is moved between the drive belt body and the drive belt body. Step out occurs by causing a slip. , Without providing a sensor for detecting that the traverse guide deviates from the traversing range of normal can be prevented from being damaged due to collision of the traverse guide surround.

According to the fourth aspect of the present invention, the driving belt and the driving belt body are engaged with the driving wheel and the guide wheel having a plurality of teeth formed along the outer peripheral surface and are wound around the driving wheel and the guide wheel. In the traverse device which traverses the yarn by reciprocating the traverse guide attached to the drive belt body by driving the drive wheel forward and reverse with the drive motor, the outer peripheral surface of the drive wheel, where the teeth are formed, The length of the outer peripheral surface is substantially the same as the width of the traverse range, and a non-engagement portion for causing a slip between the drive wheel and the drive belt body is formed on a part of the outer periphery of the drive wheel. When a step-out occurs, the traverse guide can be prevented from being damaged by collision with peripheral members without providing a sensor for detecting that the traverse guide deviates from the normal traverse range.

[Brief description of the drawings]

FIG. 1 is a front view showing a traverse device according to an embodiment of the present invention.

FIG. 2 is a diagram for explaining the principle of a stepping motor.

FIG. 3 is a front view showing the operation of the traverse device after the step-out of the drive motor occurs.

FIG. 4 is a front view showing the operation of the traverse device after the step-out of the drive motor occurs.

FIG. 5 is a front view showing the operation of the traverse device after the step-out of the drive motor occurs.

[Explanation of symbols]

 Reference Signs List 1 traverse device 2 timing belt 4 traverse guide 5 drive motor 6 drive pulley

Claims (4)

[Claims] An engaging state is established between a driving wheel and a guide wheel having a plurality of teeth formed along an outer peripheral surface thereof, and a driving motor is used to drive a driving belt body wound around the driving wheel and the guiding wheel in forward and reverse directions. Accordingly, in the traverse device which traverses the yarn by reciprocating the traverse guide attached to the drive belt body, a means for releasing the engagement relationship between the drive wheel and the drive belt body at the time of step-out is provided. A traverse device characterized by the following. 2. A driving belt and a driving belt body wound around the driving wheel and the guide wheel are engaged with the driving wheel and the guide wheel having a plurality of teeth formed along the outer peripheral surface, and are driven forward and reverse by the driving motor. Accordingly, in a traverse device that traverses the yarn by reciprocating a traverse guide attached to the drive belt body, teeth for engaging the drive belt body are formed on the outer peripheral surface of the drive wheel. And a non-engagement portion where the tooth is missing is formed, and when the forward / reverse drive range of the drive wheel deviates from the normal range, the non-engagement portion exceeds the end of the engagement portion. A traverse device configured to contact a drive belt body. 3. A drive wheel and a guide wheel having a plurality of teeth formed along an outer peripheral surface thereof are engaged with each other, and the drive belt and the drive belt body wound around the guide wheel are driven forward and reverse by a drive motor. Accordingly, in a traverse device that traverses the yarn by reciprocating a traverse guide attached to the drive belt body, teeth for engaging the drive belt body are formed on the outer peripheral surface of the drive wheel. The engaging portion and the non-engaging portion in which the teeth are missing are formed. During normal traverse, the engaging portion of the driving wheel and the driving belt body engage with the forward / reverse driving of the driving wheel. The drive belt body is driven forward and backward, and when the forward / reverse drive range of the drive wheel deviates from the normal range, a slip is generated between the non-engaged portion of the drive wheel and the drive belt body. Traverse device 4. A drive wheel and a guide wheel having a plurality of teeth formed along an outer peripheral surface thereof are engaged with each other, and the drive belt and the drive belt body wound around the guide wheel are driven forward and reverse by a drive motor. Accordingly, in the traverse device for traversing the yarn by reciprocating the traverse guide attached to the drive belt body, the outer peripheral surface length of the tooth formed portion of the outer peripheral surface of the drive wheel is set to the traverse range. And a non-engaging portion for causing a slip between the drive wheel and the drive belt body is formed in a part of the outer periphery of the drive wheel.