JPH08100334A - Drafting apparatus of spinning frame - Google Patents

Abstract

PURPOSE: To prevent the winding of fly waste on a weight member placed at the intermediate part of a top apron, enable easy removal of the wound fly waste if any and facilitate the attaching and detaching of the weight member to a top cradle. CONSTITUTION: A supporting member 19 is detachably attached at a position corresponding to an intermediate bottom roller 4 between both side walls 6a, 6b of a top cradle 5 supporting a top apron 18. The supporting member 19 has a planer rectangular frame form having opened upper and lower sides and made of a synthetic resin. The supporting member 19 holds a metallic weight roller 20 in a state to be movable in vertical direction while contacting a part of the circumference of the weight roller with the lower inner face of the top apron 18. Both ends of the weight roller 20 are formed in flat form. The inner face of the lower side of the front wall 19b and the rear wall 19c of the supporting member 19 corresponding to the curved face of the weight roller 20 are curved to correspond to the curved face of the weight roller 20.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art In a draft device of this type, a pair of aprons are wound around a tensor and a driving roller, and when the distance between the tensor and the driving roller is widened to accommodate the spinning of long fibers, Inadequate fiber gripping in the middle of both aprons. In order to eliminate this inconvenience, Japanese Examined Patent Publication No. 28563/1982 provides a muscle roller for supporting the upper and lower surfaces of the apron in the middle portion of the lower apron, and a position corresponding to the muscle roller in the middle portion of the upper apron. Discloses a device provided with a weight roller in contact with the lower upper surface of the apron. This publication does not disclose the detailed structure of the weight roller.

An apparatus shown in FIGS. 6 and 7 (a) has been implemented as a drafting apparatus having a weight roller provided at an intermediate portion of an apron. The apron device 32 arranged behind the front bottom roller 31 a and the front top roller 31 b has a top cradle 35 arranged above the bottom apron 33. An intermediate bottom roller 34 is arranged in an intermediate portion of the bottom apron 33 so as to be in contact with the bottom apron 33. The top cradle 35 is composed of a pair of side walls 35a and 35b and an upper wall 35c connecting the side walls 35a and 35b. The top apron 36 is wound around a top tensor 37 and a top roller 38. Support holes 39 are formed in the side walls 35a and 35b at positions corresponding to the intermediate bottom roller 34,
A tubular weight roller 41 is supported by a support shaft 40 inserted through the support hole 39. The support shaft 4 is provided outside the side wall 35a.
A restriction piece 42 for restricting the movement of 0 in the longitudinal direction is rotatably attached by a pin 43. Then, the top apron 36 is pressed by the weight of the weight roller 41,
It is designed to ensure proper fiber gripping.

[0004]

Since the weight roller 41 is supported while being loosely inserted in the support shaft 40, a gap δ1 between the peripheral surface of the support shaft 40 and the inner surface of the weight roller 41,
Fly flies easily accumulate on the peripheral surface of the support shaft 40 facing the inner surfaces of both side walls 35a, 35b or the gap δ2 between the inner surfaces of both side walls 35a, 35b and the end surface of the weight roller 41 (both are shown in FIG. 7A). . Especially, the fly cotton is easily wrapped around the peripheral surface of the support shaft 40. If the piles and the wrapping of the cotton wool are left undisturbed, the piled fibers and the wrapping fibers will grow, and the rotation of the weight roller 41 will be hindered, and the stable running of the apron will be impossible. Therefore, it is necessary to remove the accumulated fly dust, and the conventional apparatus has a problem that the cycle of the fly dust removal work is short.

When removing the cotton wool, the top roller 38 is first removed from the top cradle 35, and the top apron 36 is removed from the top roller 38. Next, the restriction piece 42 is rotated to expose the support hole 39, the support shaft 40 is extracted from the support hole 39, and the weight roller 41 is removed. Then, in that state, the deposited cotton wool and the wrapped fibers are removed. After the removal, the weight roller 41 is attached to the top cradle 35 in the reverse procedure. The work of attaching / detaching the weight roller 41 to / from the top cradle 35 was troublesome.

Further, in order to spin a yarn with less unevenness, it is necessary to adjust the contact pressure of the apron to an appropriate value in accordance with the spinning conditions. It may be replaced with a different weight roller 41. The replacement work is also troublesome because it requires the same procedure as described above.

As shown in FIG. 7 (b), if a solid roller 44 having shaft portions 44a projecting from both ends is used as a weight roller, the weight of the support shaft 40 inside the weight roller 41 is as described above. The cotton wool does not wrap around the circumference. However, the winding of the cotton wool around the shaft portion 44a similarly occurs.

The present invention has been made in view of the above problems, and an object thereof is to prevent the cotton wool from being wound around the weight member arranged in the middle portion of the top apron, and when it is temporarily wound. Another object of the present invention is to provide a drafting device for a spinning machine which can be easily removed and whose weight member is easily attached to and detached from the top cradle.

[0009]

In order to achieve the above object, the invention according to claim 1 is provided with a pair of aprons that are wound between a drive roller and a tensor and are pressed against each other, and an intermediate apron. The intermediate apron roller is installed in the upper part of the top apron, and the upper apron is supported in the middle part of the top apron in the draft device equipped with a weight member that presses the top apron to the bottom apron side by its own weight at a position corresponding to the intermediate bottom roller At the position corresponding to the intermediate bottom roller in the top cradle, a roller-shaped weight member whose both ends are formed in a uniform surface is moved vertically with a part of its peripheral surface abutting the lower inner surface of the top apron. A support member that holds the
The top cradle is detachably fitted between both side walls, and the support member has an opening larger than the outer shape of the weight member.

Further, in the invention described in claim 2,
In the invention described in (1), a supporting member that holds a spherical weight member so as to be vertically movable instead of the roller-shaped weight member is detachably provided.

According to the invention of claim 3, the invention of claim 1
Alternatively, in the invention according to claim 2, the support member is open at both upper and lower sides, the upper opening is formed so that the weight member can pass therethrough, and the lower opening is formed so that the weight member cannot pass therethrough.

According to the invention described in claim 4, claim 3
In the invention described in (1), the lower inner surface of the wall surface of the support member corresponding to the curved surface of the weight member is curved and formed corresponding to the curved surface of the weight member.

[0013]

According to the first aspect of the invention, the pair of aprons wound between the drive roller and the tensor travel in a state in which the opposing surfaces are in pressure contact with each other. The middle part of the apron receives an appropriate pressing force by the middle bottom roller and the weight member to grip the fiber. The roller-shaped weight member presses the top apron toward the bottom apron at a position corresponding to the intermediate bottom roller by its own weight. Both ends of the roller-shaped weight member have a uniform surface, and since there is no support shaft, it is difficult for piles or wraps to occur. The support member is detached from the both side walls of the top cradle or mounted between the both side walls with one touch. The weight member is inserted into the support member through the opening.

According to the second aspect of the present invention, since the weight member is spherical, it is more difficult for wind fly to be wound around.
In the invention according to claim 3, the weight member is detached from the upper opening of the support member, and the weight member does not fall off from the lower side of the support member.

According to the fourth aspect of the invention, since the lower inner surface of the wall surface of the support member is curved corresponding to the curved surface of the weight member, the weight member is supported in a more stable state.

[0016]

【Example】

(First Embodiment) A first embodiment of the present invention will be described below with reference to FIGS.

The bottom apron 1 is wound around a bottom roller 2 as a driving roller, a bottom tensor 3 as a tensor, and an intermediate bottom roller 4 arranged in the middle of the two. The bottom tenser 3 is fixed at a predetermined position with both end portions thereof protruding to both sides of the bottom apron 1.

The top cradle 5 is made of metal and comprises a pair of side walls 6a and 6b and an upper wall 6c for connecting the side walls 6a and 6b. 7 is arranged above the bottom apron 1 in a state of engaging with a groove (not shown) formed in the bottom ten server 3. The top cradle 5 is formed with a hooking groove 8 extending in a slightly downward direction, and a top tensor 9 as a tensor is fixed to the top cradle 5 with both ends hooked in the hooking grooves 8.

A guide groove 10 is provided at the rear of the side walls 6a and 6b.
And a pin 11 is provided on the outside of the lower rear end, and the pin 11 is hooked on a hooking member 13 fixed to the frame 12. The top roller 14 as a drive roller is supported with its support shaft 14 a inserted into the guide groove 10. The support shaft 14a is biased toward the bottom roller 2 by a torsion spring 16 supported by a pin 15 provided on both side walls 6a and 6b. Torsion spring 1
6, one end is hooked on the upper wall 6c, and the other end is on both side walls 6a, 6
It is hooked on a hooking piece 17 protruding from b. The top apron 18 is wound around the top tensor 9 and the top roller 14.

A support member 19 is provided between the side walls 6a and 6b at a position corresponding to the intermediate bottom roller 4, and an upper end of the support member 19 is provided on the upper wall 6.
It is detachably fitted in a state of abutting with c. The support member 19 is formed of a synthetic resin in the shape of a flat rectangular frame whose upper and lower sides are open. A weight roller 20 as a roller-shaped weight member is held by the support member 19 so as to be movable in the vertical direction with a part of its peripheral surface abutting the lower inner surface of the top apron 18. The weight roller 20 is made of metal and has both ends flat, that is, a cylindrical shape having a uniform surface without a shaft portion. Support member 1
9 is a side wall 19a corresponding to both side walls 6a and 6b.
The front wall 19b and the rear wall 19c, which are formed in parallel with a and 6b and correspond to the curved surface of the weight roller 20, have their lower portions curved so that their lower inner surfaces curve corresponding to the curved surface of the weight roller 20. There is. That is, both upper and lower sides of the support member 19 are opened, the upper opening 21a is formed so that the weight roller 20 can pass therethrough, and the lower opening 21b is formed.
Are formed so that the weight roller 20 cannot pass through.

Notches 22 are formed in the front wall 19b and the rear wall 19c to allow the top apron 18 to pass therethrough. The weight roller 20 includes a front wall 19b and a rear wall 19c.
Is arranged such that there is a clearance (not shown) between at least one of them. Since the draft device is installed on the spinning machine in a state of falling forward, the weight roller 20
The front wall 19b is formed shorter than the rear wall 19c so that its own weight is surely applied to the apron. The length of the front wall 19b is set corresponding to the inclination angle when the draft device is attached to the spinning machine.

Next, the operation of the device configured as described above will be described. The top apron 18 has a force by which the top roller 14 is pressed toward the bottom roller 2 and a weight roller 20.
It is pressed against the bottom apron 1 by the pressing force of its own weight. The bottom apron 1 is rotated by the rotation of the bottom roller 2, and the top apron 18 is rotated in synchronization with the bottom apron 1 by the contact pressure with the bottom apron 1.
A fiber bundle (not shown) is transferred in cooperation with the bottom apron 1.

The side on which the aprons 1 and 18 are pressed against each other, that is, the side on which the fiber bundle is gripped and transferred is the slack side of the apron, so 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. Further, the top apron 18 is also pressed toward the bottom apron 1 by the weight roller 20 arranged at a position corresponding to the intermediate bottom roller 4, so that the slack that adversely affects the regulation force of the fiber bundle does not occur.

The fiber bundle transported while being held by both aprons 1 and 18 is held by a pair of front rollers (not shown) arranged in front of the aprons 1 and 18.
It is stretched due to the difference between the rotational speed of the front roller and the rotational speeds of the aprons 1 and 18. At this time, if the traveling paths of the aprons 1 and 18 of the portion that grips the fiber bundle and the grip portion of the front roller are aligned, the pull-out resistance of the fiber becomes too weak. However, in this device, since the bottom ten server 3 is arranged so as to be slightly lowered frontward, the pulling-out resistance of the fiber does not become too weak.

The weight roller 20 is in contact with the inner surface of the top apron 18 with a clearance between the weight roller 20 and at least one of the front wall 19b and the rear wall 19c of the support member 19. The top apron 18 rotates with the load point position regulated as the top apron 18 travels. The end surface of the weight roller 20 is in light contact with both side walls 19a of the support member 19, and the weight roller 20 rotates with its movement in the longitudinal direction being restricted. That is, the weight roller 20 rotates at a predetermined position as the top apron 18 travels. Further, since the space between the side walls 19a and the side portion of the top apron 18 is narrow, the side walls 19a restrict the movement of the top apron 18 in the width direction, and the top apron 18 travels at a predetermined position.

Unlike the conventional apparatus, since the top roller 20 does not have a part such as a support shaft having a small diameter and easy to wind fibers, the pile growth of fly cotton is unlikely to occur. As a result, the cleaning cycle can be extended.

To remove the accumulated cotton wool, first remove the top roller 14 from the top cradle 5 and then remove the top apron 18 from the top roller 14. Next, the support member 19 is removed from the top cradle 5. The support member 19 uses the elastic force of synthetic resin to form the top cradle 5.
Since it is attached to the, it can be easily removed with one touch. Then, the weight roller 20 is taken out from the upper opening 21a of the supporting member 19 to remove the accumulated cotton wool. Since the weight roller 20 is loosely inserted in the support member 19, it can be easily removed. Further, since the top roller 20 does not have a portion where the fibers are easily wound, the accumulated cotton wool can be easily removed.

After removing the cotton wool, the weight roller 20 is inserted from the upper opening 21a of the supporting member 19 and then the notch 2 is formed.
The top apron 18 is locked to the 2 and the support member 19 is fitted in a predetermined position of the top cradle 5 in this state. Then, after the top apron 18 is wound around the top roller 14, the top roller 14 is attached to the top cradle 5. Wrap the top apron 18 around the top roller 14 and attach the top roller 14 to the top cradle 5.
The work of attaching the weight roller 20 to the top cradle 5 is much simpler than that of the conventional device which requires the attachment of the support shaft.

Further, the number of parts supporting the weight roller 20 is only one for the supporting member 19, and the number of parts when the supporting shaft is used is not limited to the supporting shaft, but a pair of restricting pieces and a pin for supporting them. The total is 5, which is less than the total.

Further, in this embodiment, since the support member 19 is formed so that the weight roller 20 cannot pass through the lower opening 21b, the weight roller 20 is supported even when the support member 19 is removed from the top cradle 5. Member 19
It will be in a state of being supported by and will be easy to handle.

Further, even when the weight roller 20 is replaced with one having a different weight due to a change in spinning conditions, the work becomes easy. When the weight rollers 20 having different specific gravities are used, only the weight rollers 20 are replaced, and when the materials are the same, the diameters are different.
Replace each.

(Second Embodiment) Next, a second embodiment will be described with reference to FIGS. This embodiment is different from the first embodiment in that the weight member is formed in a spherical shape and the shape of the support member 19 is changed correspondingly, and other configurations are basically the same. The same parts as those in the above-mentioned embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

A ball 23 is provided as a weight member instead of the weight roller 20. The lower inner surface of the side wall 19a of the support member 19 is also formed into a curved surface corresponding to the peripheral surface of the ball 23. The front wall 19 is also formed on the inner surfaces of both side walls 19a.
A notch 24 continuous with the notch 22 formed in the rear wall 19c and the rear wall 19c is formed. The ball 23 has an upper opening 2
It is inserted into the inside of the support member 19 from 1a, and is rotatably arranged in a state where a clearance (not shown) is present between the support member 19 and the lower inner surface.

In this embodiment, the contact pressure distribution in the width direction of the top apron 18 is different from the case where the weight roller 20 is used, as shown in FIG. Becomes However, since the fiber bundle to be drafted passes through the central portion in the width direction of the apron, the gripping function is not so different from when the weight roller 20 is used. And ball 2
In the case of No. 3, as compared with the case of the weight roller 20, winding of the cotton wool is less likely to occur.

The present invention is not limited to the above embodiment, but may be embodied as follows. (1) As shown in FIG. 5, the weight roller 20 may be shaped so that its diameter gradually decreases from the central portion toward both end portions. In this case, the gripping function of the apron for the fiber bundle is the same as in the first embodiment. Then, even if the fibers are wound around the weight roller 20, the fibers are likely to move to the end side and the fibers are easily removed. Also, the weight roller 2
Both end surfaces of 0 are not limited to flat surfaces and may be curved surfaces that are convex outward.

(2) A convex portion having a curved surface may be provided on one of the inner surface of the top cradle 5 and the outer surface of the support member 19, and a concave portion corresponding to the other may be provided. The convex portion or concave portion provided on the top cradle 5 is easily formed by pressing. In this case, the convex portion and the concave portion serve as positioning portions, so that the support member 19 can be easily fitted in a predetermined position.

(3) The length of the support member 19 in the vertical direction may be shortened, and the support member 19 may be fitted between the side walls 6a and 6b in a state where the upper end thereof does not contact the upper wall of the top cradle 5. In this case, it is preferable to adopt the configuration of (2) above.

(4) The shape of the support member 19 may be such that the weight roller 20 or the ball 23 can be inserted or removed from either side of the upper opening 21a and the lower opening 21b.

(5) The surface of the weight roller 20 and the ball 23 made of metal may be coated with resin. In this case, even if a material that easily rusts is used as the metal, the presence of the resin coating layer makes it difficult to rust, the range of usable metals increases, the weight of the weight member can be easily adjusted, and the cost can be reduced.

Inventions other than those described in the claims that can be grasped from the above-mentioned embodiments and modifications will be described below together with their effects. (1) In the inventions according to claims 1 to 4, a plurality of types of weight members having the same shape but different weights are prepared, and the weight members can be exchanged according to a change in spinning conditions. In this case, it is possible to replace with a weight member corresponding to the change of spinning conditions without replacing the supporting member.

[0041]

As described in detail above, according to the invention described in claim 1, it is possible to prevent the cotton wool from being wound around the weight member arranged in the middle portion of the top apron, and even when the weight cotton is temporarily wound. It can be easily removed. Further, according to the invention described in claim 2, winding of the cotton wool is less likely to occur.
According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, when the support member is removed from the top cradle, the weight member from the lower side of the support member is removed. It is prevented from falling off and is easy to handle. or,
According to the invention as set forth in claim 4, the weight member is further supported at a predetermined position in a more stable state.

[Brief description of drawings]

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

FIG. 2 is a partial cross-sectional view showing a supporting state of the weight roller.

FIG. 3 is a partial side view of the second embodiment.

FIG. 4 is a schematic diagram showing a ball support state and a contact pressure distribution.

FIG. 5 is a front view of a weight roller of a modified example.

FIG. 6 is a partially cutaway side view of a conventional device.

7A is a cross-sectional view of a conventional device, and FIG. 7B is a front view of another weight roller.

[Explanation of symbols]

1 ... bottom apron, 2 ... bottom roller as drive roller, 3 ... bottom tenserver as tensor, 5 ...
Top cradle, 6a, 6b ... Side wall, 9 ... Top tensor as tensor, 14 ... Top roller as driving roller, 18 ... Top apron, 19 ... Support member, 2
0 ... Weight roller as weight member, 21a ... Upper opening, 21b ... Lower opening, 23 ... Ball as weight member.

Claims (4)

[Claims] 1. A pair of aprons that are wound between a drive roller and a tensor and are pressed against each other, an intermediate bottom roller is provided at an intermediate portion of a bottom apron, and an intermediate bottom roller is provided at an intermediate portion of a top apron. In a draft device equipped with a weight member that presses the top apron to the bottom apron side by its own weight at a position corresponding to, both ends are formed into a uniform surface at a position corresponding to the intermediate bottom roller in the top cradle supporting the top apron. A support member that holds the roller-shaped weight member so that it can move in the vertical direction while part of its peripheral surface is in contact with the lower inner surface of the top apron is detachably fitted between both side walls of the top cradle. And a draft device for a spinning machine, in which the support member is provided with an opening larger than the outer shape of the weight member. 2. The draft device for a spinning machine according to claim 1, further comprising a support member detachably provided instead of the roller-shaped weight member, the support member holding a spherical weight member so as to be vertically movable. 3. The support member is open at both upper and lower sides, and the upper opening is formed so that a weight member can pass therethrough,
The draft device for a spinning machine according to claim 1 or 2, wherein the lower opening is formed so that the weight member cannot pass through. 4. The drafting device for the spinning machine according to claim 3, wherein the support member has a lower inner wall surface corresponding to the curved surface of the weight member, which is curved corresponding to the curved surface of the weight member.