JPH093734A - Apron draft device in spinning machine - Google Patents

Abstract

PURPOSE: To enable the support of a top apron in a state parallel to a bottom apron and the easy vertical adjustment of a cradle to a position corresponding to spinning conditions in an apron draft apparatus of two-spindles-in-one-body- type. CONSTITUTION: A supporting shaft 9 is supported in a freely rotatable manner by a supporting arm 13 placed on a waiting arm 12 in a protruding state, and a cradle 6 is supported by the supporting shaft 9. At a front part of the cradle 6, a top tensor 7 is fastened, and a top apron 11 is wound around a top roller 10, which is fixed at both ends of the supporting shaft 9, and the top tensor 7. A tensor gauge adjusting piece 20 is fitted to the top tensor 7, and also a pair of guide pieces 21 are placed in a protruding manner at corresponding positions to the top apron 11. Slots 5 are formed on a bottom tensor bar 3 at positions corresponding to the guiding pieces 21. This constitution enables the contact of the touching face 21a of the guide piece 21 to the front end of the slot 5 when the top apron 11 is placed at the spinning position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apron draft device for a spinning machine, and more particularly to an apron draft device suitable for spinning long fibers.

[0002]

2. Description of the Related Art Generally, in a ring spinning machine, an apron drafting device is arranged between a front roller and a back roller so that a roving is grasped and drafted between a top apron and a bottom apron. . In order to reduce draft unevenness and perform drafting at a desired draft rate, it is important to maintain high parallelism between the top apron and the bottom apron. The bottom apron is always held in a predetermined position after being assembled once, but the top apron is often arranged at a position separated from the bottom apron at the time of thread breakage or maintenance work. Therefore, a device for arranging the cradle that supports the top apron in a state of being accurately positioned at the draft position where the top apron contacts the bottom apron has been conventionally made. In addition, in order to facilitate maintenance work, the draft device supports the top roller including the top apron on the weighting arm and separates the top roller from the draft position (spinning position) where the top roller abuts against the bottom roller. Many configurations that can be placed in the standby position are adopted.

FIG. 3 is disclosed in Japanese Utility Model Publication No. S49-108919.
As shown in FIG. 4, a configuration is disclosed in which the ten server 41 is formed in an L-shaped cross section, and the leg pieces 43 of the cradle 42 are attached to the ten server 41 while penetrating the window holes 44 formed in the ten server 41. Has been done. Leg 4
3 is formed with a claw piece 45 on the rear side of the lower part, and the leg piece 43 is formed in the window hole 4
4 is inserted and the inclined edge 45a of the claw piece 45 is engaged with the lower end portion of the tenserver 41, a forward component force is generated in the leg piece 43, and the front side of the leg piece 43 is opened by the window hole 44 by the component force. It is pressed against the front end of and fixed in place. The top apron 46 is wound around a top tensor 47 and a top roller 48 supported by the cradle 42.

Further, Japanese Unexamined Patent Publication No. 50-90728 discloses a top apron guiding device having the structure shown in FIG. The arbor 50 of the cradle roller (top roller) 49 is supported by a weighting arm (not shown) assembled to the weighting arm. Cradle 5
1 is a tension extension part (tensor) 53 having an ear part 52 for guiding the top apron 46, and a ten server 54.
And a leg portion 55 that abuts on the upper surface of the. Cradle 51
On the lower surface of the leg portion 56 that abuts the rear edge of the tenserver 54.
A cradle support frame 56 having a is integrally provided, and a support member 5 engaging with the arbor 50 is provided at a rear portion of the support frame 56.
7 is extended.

[0005]

In order to spin a yarn with less unevenness, it is necessary to adjust the contact pressure of the apron to an appropriate value according to the spinning conditions. When adjusting the contact pressure of the apron, it is necessary to adjust the vertical position of the cradle 42, 51. In both of the above conventional devices, the cradle 42, 51 supporting the top apron 46 can be arranged at a predetermined position. However, in any case, it is not considered to use the same cradle by changing its mounting position when changing the spinning conditions.

In the apparatus disclosed in Japanese Utility Model Laid-Open No. Sho 49-108919, the front edge of the leg piece 43 is pressed against the front edge of the window hole 44 by engaging the inclined edge 45a of the claw piece 45 with the lower end of the tenserver 41. Be positioned. Therefore, although it is accurately positioned at one predetermined position, it is not possible to perform vertical position adjustment so as to selectively correspond to a plurality of predetermined positions. In addition, JP-A-50-90728
In the device disclosed in the publication, the height of the front side of the cradle 51 is regulated by the leg portions 55, and the leg portions 56a of the support frame 56 are brought into contact with the rear edge of the ten server 54, so that the top apron 46 and the bottom apron 58 are provided. Parallelism with is secured. Therefore, the vertical position adjustment cannot be performed.

That is, in the case of both of the above conventional apparatuses, it is necessary to prepare a plurality of types of cradle corresponding to the spinning conditions and to change the entire cradle when changing the spinning conditions, thus manufacturing a plurality of types of cradle. Therefore, the cost becomes high, and it is necessary to secure a large storage space.

The present invention has been made in view of the above problems, and an object thereof is to improve the parallelism between a top apron and a bottom apron in an apron draft device integrated with two weights attached to a weighting arm. It is an object of the present invention to provide an apron draft device for a spinning machine, which can be supported in a state and can easily adjust the vertical position of the cradle to a position corresponding to a spinning condition.

[0009]

In order to achieve the above object, according to the invention of claim 1, in a two-pile-integrated apron draft device attached to a weighting arm, a top tensor is provided with tensor gauge adjusting means.
At the front of the cradle that is supported by the waiting arm and equipped with a top tensor at the tip, a pair of guide parts that extend downward at a distance slightly wider than the width of each top apron and bottom apron is provided. A restriction part through which the guide part is inserted is provided, and the positional relationship between the guide part and the restriction part is set such that the front surface of the guide part contacts the restriction part when the top apron is placed at the spinning position.

According to a second aspect of the present invention, an intermediate bottom roller is provided at an intermediate portion of the bottom apron, and the cradle has a top apron on the bottom apron side due to its own weight at a position corresponding to the intermediate bottom roller. A weight roller for applying pressure is provided.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the tenserver is formed to have a substantially L-shaped cross section, and the restricting portion guides the bottom apron of the tenserver. It is a hole formed in the guide surface.

According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the guide portion and the regulating portion when the cradle is placed at the spinning position. The contact surface is formed in a shape that extends obliquely rearward.

[0013]

According to the invention described in claims 1 to 4, the top apron and the bottom apron run in a state where the surfaces facing each other are pressed against each other. The top apron is pressed against the bottom apron with a predetermined contact pressure by the weighting arm pressing the cradle with the tensor gauge adjusting means attached to the top tensor in contact with the top surface of the tenserver. The tensor gauge is changed by the tensor gauge adjusting means. When the waiting arm is placed in the setting position, each cradle receives a downward pressure on the front side by the weighting arm, and the front surface of the pair of guides provided at the front of each cradle is a regulation part formed on the tenserver. Is positioned so as to be in contact with. Then, the top apron is arranged in a state orthogonal to the longitudinal direction of the tenserver, and the pair of guide portions regulates the movement of the top apron and the corresponding bottom apron in the width direction.

According to the second aspect of the present invention, the action of the intermediate bottom roller and the weight roller allows the fibers to be sufficiently held in the intermediate portion of both aprons, and the apron is formed to be long corresponding to the spinning of long fibers. Also in this case, the fiber bundle is drafted while the draft unevenness is suppressed.

In the invention according to claim 3, since the tenserver is formed in a substantially L-shaped cross section, it is difficult to bend even when formed long so as to make it common to a large number of weights. Variation is reduced.

In the invention of claim 4, since the contact surface of the guide portion with the regulating portion is formed to extend obliquely rearward, the vertical position of the tip of the cradle is adjusted by the tensor gauge adjusting means. Even if adjustment is made, it is easy to secure the contact state between the contact surface of the guide portion and the regulation portion.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in an apron draft device of a two-pile integral type will be described below with reference to FIGS. As shown in FIG. 1, the bottom apron 1 is wound around a bottom roller 2, a bottom tenserver 3 as a tenserver, and an intermediate bottom roller 4 arranged in the middle of the two. The bottom ten server 3 is formed in a substantially L-shaped cross section, has a length common to a plurality of weights (common to eight weights in this embodiment), and is arranged parallel to the longitudinal direction of the machine base. The bottom ten server 3 has a long hole 5 as a restriction portion formed on a guide surface 3a for guiding the bottom apron 1. As shown in FIG. 2, the long holes 5 are formed so as to form pairs at positions corresponding to both side portions of each bottom apron 1.

The cradle 6 has a pair of side walls 6a and 6b and an upper wall 6c connecting both side walls 6a and 6b formed by bending a metal plate, and a top tensor 7 having two common weights is provided in front of the upper wall 6c. However, it is fixed at its central portion. A groove 8 whose bottom is opened is formed at the rear ends of both side walls 6a and 6b. A support shaft 9 is inserted into the groove 8 and is supported, and top rollers 10 are supported on both ends of the support shaft 9 so as to be integrally rotatable. The top apron 11 is wound around the top tensor 7 and the top roller 10.

The support shaft 9 has a central portion projecting from a known weighting arm 12 (only part of which is shown in FIG. 1) for supporting a top front roller and a top back roller (neither shown). The lower end of 13 is rotatably supported. That is, the cradle 6 is supported by the weighting arm 12 via the support shaft 9. A leaf spring 14 is fixed to the front center of the upper wall 6c to bias the top tensor 7 toward the bottom apron 1 when the weighting arm 12 is placed at the setting position (spinning position).

A support shaft 15 is fixed to the cradle 6 at a position corresponding to the intermediate bottom roller 4 so as to penetrate both side walls 6a and 6b. Weight rollers 16 are removably inserted into both end portions of the support shaft 15, that is, free ends, with a part of the peripheral surface thereof abutting the inner surface of the top apron 11. That is, the support shaft 15 that supports the weight roller 16 is supported in a cantilever state with respect to the cradle 6. An annular engagement recess 17 is formed on the inner surface of the weight roller 16. The engaging recess 17 has a trapezoidal cross section. On the outer peripheral surface of the support shaft 15, a plurality of locking portions 18 that can engage with the ends of the engaging recesses 17 in the roller axis direction are provided in a protruding manner. The minimum inner diameter portion of the weight roller 16, that is, the diameter of the portion other than the engaging recess 17 is formed to be larger than the maximum outer diameter portion of the support shaft 15, that is, the diameter at the position of the locking portion 18. The weight roller 16 presses the top apron 11 toward the bottom apron 1 by its own weight.

FIG. 2 is a plan view showing the relationship between the bottom ten server 3 and the cradle 6, and the bottom roller 2 and the intermediate bottom roller 4 are omitted. As shown in FIG.
A guide piece 19 having a pair of left and right guide portions 19a for restricting the movement of the top apron 11 in the width direction is fixed to the rear upper surface of the upper wall 6c. A resin-made tensor gauge adjusting piece 20 as tensor gauge adjusting means is detachably fitted to the central portion of the front end of the top tensor 7. A pair of guide pieces 21 as guide portions for restricting the movement of the top apron 11 and the bottom apron 1 in the width direction are fixed to the lower surfaces of the left and right sides of the top tensor 7. Top apron 11 and bottom apron 1
Are formed to have the same width, and the pair of guide pieces 21 are projected in parallel with each other with a space slightly wider than the width of the top apron 11 and the bottom apron 1. And the guide piece 21
When the weighting arm 12 is arranged in the setting position, that is, when the top apron 11 is arranged in the spinning position, the guide piece 21 penetrates the long hole 5 and the front surface thereof is long hole. The positional relationship is set so as to be in contact with the front end of No. 5. The guide piece 21 is formed in a shape in which the contact surface 21a with the elongated hole 5 extends obliquely rearward when the cradle 6 is arranged at the spinning position.

Next, the operation of the device configured as described above will be described. In the opened state where the pressure applied by the waiting arm 12 is released, the cradle 6 is placed in the top apron 1.
1 is arranged so as to be held at a position separated from the bottom apron 1. When the waiting arm 12 is arranged at the setting position (spinning position) where the front top roller and the back top roller are pressed toward the bottom roller (neither is shown), the portion corresponding to the top roller 10 of the top apron 11 is located. , The bottom apron 1 is brought into contact with a portion corresponding to the bottom roller 2. When the weighting arm 12 is further rotated to the pressurizing side, the leaf spring 14 engages with the lower surface of the weighting arm 12 and the cradle 6 receives a pushing force in the diagonally forward direction via the leaf spring 14. Then, the forward movement of the cradle 6 is restricted in a state where each guide piece 21 engages with the front end of the elongated hole 5 of the bottom tenser 3, and the tensor gauge adjustment piece 2
When 0 touches the upper surface of the bottom tenser 3, the downward movement of the cradle 6 is restricted. That is, the cradle 6 is positioned in a state orthogonal to the longitudinal direction of the bottom tenser 3 by the guide pieces 21 contacting the front ends of the elongated holes 5. Further, the tensor gauge adjusting piece 20 is brought into contact with the upper surface of the bottom tensor 3, whereby the distance (gauge) between the top tensor 7 and the bottom tensor 3 is set to a predetermined value.

The top apron 11 has a force by which the top roller 10 is pressed toward the bottom roller 2 side, a force by which the cradle 6 is pressed toward the bottom apron 1 side through the leaf spring 14, and a pressing force due to the weight of the weight roller 16. And the bottom apron 1 is pressed by the tension of the top apron 11. The bottom apron 1 is rotated by the rotation of the bottom roller 2, and the top apron 11 is rotated by the contact pressure with the bottom apron 1 in synchronization with the bottom apron 1.
A fiber bundle (not shown) is transferred in cooperation with the bottom apron 1. The pressure contact force of the top apron 11 against the bottom apron 1 is set to an appropriate value corresponding to the spinning condition by changing at least one of the tensor gauge adjusting piece 20 and the weight roller 16.

The side where the aprons 1 and 11 are in pressure contact with each other, that is, the side where the fiber bundle is gripped and transferred is the slack side of the apron. Therefore, if the distance between the bottom tenserver 3 and the bottom roller 2 is long, it will be intermediate. The slack is generated in the portion and the regulation force of the fiber bundle is weakened. However, since the intermediate bottom roller 4 exists in the middle portion, the bottom apron 1 does not loosen even if the distance between the bottom ten server 3 and the bottom roller 2 is long. In addition, the top apron 11 also has an intermediate bottom roller 4
Since the weight roller 16 arranged at a position corresponding to is pressed against the bottom apron 1 side, slack that adversely affects the regulation force of the fiber bundle does not occur.

The weight roller 16 is removably inserted into the support shaft 15 but rotates in a state in which the engaging recess 17 engages with the engaging portion 18, so that the weight roller 16 is supported by the support shaft 1.
The movement of 5 in the axial direction is restricted. Therefore, even if there is no support portion at both ends of the weight roller 16 for supporting the support shaft 15 also as a restriction portion, the weight roller 16 does not come off from the support shaft 15 during driving of the draft device.

When the tensor gauge adjusting piece 20 and the weight roller 16 are exchanged for changing the spinning conditions, the pressing state of the weighting arm 12 is released and the top apron 11 is separated from the bottom apron 1. . The weight roller 16 has a diameter of the smallest inner diameter portion of the spindle 1.
Since it is larger than the maximum outer diameter of 5, the weight roller 1
When 6 is moved to the free end side of the support shaft 15 in a state where the center of the support 6 is aligned with the center of the support shaft 15, it can be easily removed from the support shaft 15. The weight roller 16 is easily attached to the support shaft 15 by the reverse procedure. Also, the tensor gauge adjusting piece 20 is a top tensor 7.
Since it is fitted in a state of sandwiching it, it can be easily attached and detached. Therefore, it becomes easy to replace the tensor gauge adjustment piece 20 and the weight roller 16 corresponding to the spinning conditions.

The top apron 11 travels at a predetermined position, with its upper traveling portion being guided by both guide portions 19a and its lower traveling portion being guided by both guide pieces 21 to restrict movement in the width direction. Further, the bottom apron 1 has its upper traveling portion guided by both guide pieces 21 to restrict movement in the width direction,
Drive in place. If the parallelism between the top apron 11 and the bottom apron 1 is poor, the rotation of the apron varies, and uneven draft occurs. As a result, the uniformity of the spun yarn deteriorates and the yarn quality deteriorates.

However, in this embodiment, when the weighting arm 12 is placed in the setting position, each cradle 6 is connected to the weighting arm 12 via the leaf spring 14.
As a result, the contact surface 21a of the pair of guide pieces 21 of each cradle 6 is positioned in a state of contacting the front end of the elongated hole 5 of the bottom tenser 3 by receiving a downward pressing force. In this state, the cradle 6 is held in a state orthogonal to the longitudinal direction of the bottom ten server 3, and the support shaft 9 is held in a state orthogonal to the longitudinal direction of the bottom ten server 3. The guide piece 21 is held at a position that guides the top apron 11 and the bottom apron 1 in parallel with the cradle 6. Therefore, both aprons 1 and 11 are regulated by the guide piece 21 whose front position is arranged at a predetermined position, and the two aprons 1 and 11 travel while being held in a state where the parallelism between them is high. As a result, variations in rotation of the aprons 1 and 11 are reduced, occurrence of draft unevenness is suppressed, and the yarn quality of spun yarn is improved.

In this embodiment, since the bottom ten server 3 is formed in a substantially L-shaped cross section, and the elongated hole 5 as a restricting portion is formed in the guide surface 3a, the bottom ten server 3 is used in common for a plurality of weights. Even when the server 3 is formed to be long, the bottom ten server 3 is less likely to bend, and variations in contact pressure of the top apron 11 among the weights are reduced.

Further, in this embodiment, the contact surface 21a of the guide piece 21 when the cradle 6 is arranged at the spinning position.
Is formed in a shape that extends obliquely rearward. Therefore, even if the distance between the tip of the cradle 6 and the upper surface of the bottom tenser 3 is changed by changing the tensor gauge adjusting piece 20, it is easy to secure the contact state between the contact surface 21a of the guide piece 21 and the elongated hole 5. Becomes

In this embodiment, the top apron 11 is the top tensor 7 and the top roller 10 as described above.
Since the weight roller 16 can be attached to and detached from the support shaft 15 while being wound between them, the weight roller 16 can be easily replaced and the accumulated cotton wool can be easily removed.

Further, in this embodiment, since the guide piece 21 is fixed to the top tensor 7, it is not necessary to provide a support portion for supporting the guide piece 21 on the cradle 6, and the structure is simplified.

The present invention is not limited to the above embodiment, but may be embodied as follows, for example. (1) The bottom ten server 3 is not limited to the L-shaped section,
It may be in the form of a plate bent into an acute angle like the one disclosed in Japanese Patent Laid-Open No. 50-90728, or in the form of a flat plate. Further, instead of forming the elongated hole 5 as the restricting portion, a groove having an open rear may be used as the restricting portion.

(2) Instead of the replaceable tensor gauge adjusting piece 20 as the tensor gauge adjusting means, a screw capable of adjusting the amount of protrusion from the lower surface of the top tensor 7 and an abutting portion fixed to the lower end of the screw. Also, a gauge adjusting device having a knob fixed to the upper side of the screw so as to be integrally rotatable may be provided. With this configuration, the top tensor 7 and the bottom tensor 3 can be adjusted in gauge by rotating the knob to adjust the amount of protrusion of the screw, and it is not necessary to prepare a plurality of types of tensor gauge adjustment pieces 20.

(3) The weight roller 16 does not necessarily have to come into contact with the inner surface of the top apron 11 on both the upper and lower sides, and may have a configuration of contacting only the lower inner surface of the top apron 11. Further, in an apparatus in which the bottom apron 1 and the top apron 11 are short and are not applied to drafts of long fibers, the intermediate bottom roller 4 and the weight roller 1 are used.
6 may be omitted.

(4) The guide piece 21 is attached to the top tensor 7
Instead of fixing it to the support, it may be fixed to a support portion extending from the cradle 6. (5) The guide portion 19a for guiding the upper traveling portion of the top apron 11 may be omitted.

(6) With the waiting arm 12 in the setting position, the cradle 6
Instead of the leaf spring 14, another spring such as a coil spring may be used as the urging means that urges the bottom apron 1 side.

Inventions other than those described in the claims that can be grasped from the above-described embodiments and modifications will be described below along with their effects. (1) In the invention described in claims 1 to 4, the guide portion is fixed to the lower surface of the top tensor. in this case,
It is not necessary to provide the cradle with a support portion for supporting the guide portion, and the structure is simple.

[0039]

As described in detail above, claims 1 to 4 are provided.
According to the invention described in (1), in the apron draft device of the two-weight integrated type attached to the weighting arm, the top apron can be supported in a state in which the parallelism with the bottom apron is increased, and the spinning condition can be supported. The vertical position of the cradle can be easily adjusted.

According to the second aspect of the present invention, the action of the intermediate bottom roller and the weight roller sufficiently holds the fibers in the intermediate portions of both aprons, and the aprons are formed long corresponding to the spinning of long fibers. Also in this case, the fiber bundle can be drafted while the draft unevenness is suppressed.

According to the third aspect of the present invention, since a plurality of weights are used in common, even if the tenserver is formed to be long, it is difficult to bend and the variation of the contact pressure of each weight is reduced. Claim 4
In the invention described in (1), even if the vertical position of the cradle is adjusted by changing the tensor gauge adjustment piece, it is easy to secure the contact state between the contact surface of the guide portion and the regulation portion.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of an embodiment.

FIG. 2 is a partially cutaway plan view with part omitted.

FIG. 3 is a partially cutaway side view of a conventional example.

FIG. 4 is a side view of a main part of another conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Bottom apron, 3 ... Bottom ten server as a ten server, 3a ... Guide surface, 4 ... Intermediate bottom roller, 5 ... Long hole as a regulation part, 6 ... Cradle, 7 ... Top tensor, 11 ... Top apron, 12 ... waiting arm, 16 ... weight roller, 20 ... tensor gauge adjusting piece as tensor gauge adjusting means, 2
1 ... Guide piece as a guide part, 21a ... Abutting surface.

Claims (4)

[Claims] 1. A unit attached to a weighting arm.
In the apron draft device with integrated weight, the top tensor is equipped with a tensor gauge adjusting means, and is slightly wider than the width of the top and bottom aprons in the front part of the cradle that is supported by the waiting arm and equipped with the top tensor at the tip. A pair of guide portions extending downward at intervals is provided, and a control portion through which the guide portions are inserted is provided in the ten-server, and when the top apron is placed at the spinning position, the front surface of the guide portion is the regulation portion. An apron draft device for a spinning machine, in which the positional relationship between the guide portion and the regulating portion is set so as to be in contact with the apron. 2. An intermediate bottom roller is provided at an intermediate portion of the bottom apron, and a weight roller for pressing the top apron to the bottom apron side by its own weight is provided at a position corresponding to the intermediate bottom roller at the cradle. The apron draft device for a spinning machine according to claim 1. 3. The spinning machine according to claim 1, wherein the tenserver is formed in a substantially L-shaped cross section, and the restricting portion is a hole formed in a guide surface for guiding a bottom apron of the tenserver. Apron draft device. 4. The guide part is formed in a shape in which a contact surface with the regulating part extends obliquely rearward when the cradle is arranged at the spinning position.
An apron draft device for a spinning machine according to any one of 1.