JP5737246B2 - Top apron cradle in spinning machine draft equipment - Google Patents

Description

  The present invention relates to a top apron cradle in a draft device of a spinning machine.

  Generally, in a ring spinning machine, an apron draft device is disposed between a front roller and a back roller, and a rough yarn is gripped and drafted between a top apron and a bottom apron. In order to reduce the variation between the spindles of the quality of the spun yarn and ensure the yarn quality, it is necessary to ensure the parallelism between the cradle and the top roller and the bottom roller.

  Conventionally, it has a main body that swings with the top roller gripping part engaged with the support shaft of the top roller, and a tensor provided at the tip of the main body, and the apron attached to the top roller is put in tension by the tensor. In the cradle configured to hold, the following configuration has been proposed. That is, the top roller gripping portion is recessed in a circular arc shape along the support shaft peripheral surface of the top roller, and a pair of leg pieces are suspended in parallel from the front side of the top roller gripping portion, and the rear side of each leg piece. Is brought into contact with the front peripheral surface of the support shaft of the top roller, and the front side is pressed against the back surface of the bottom tenserver, so that the tensor provided in the main body is held in parallel with the support shaft (Patent Document 1). reference). The cradle is made of metal and is formed by pressing.

  Also, as shown in FIG. 5, the apron guide 52 forms a convex curved slide surface 54 for the top apron 53 in the rotational direction following the guide edge 51, and the apron guide 52 in which the pins are integrally formed has a central portion. There has been proposed a structure that is accurately guided in the groove formed in the above (see Patent Document 2). The apron guide 52 is attached to the central part of the top apron cradle 55 and tensions the top apron 53 by the force of the spring 56. The central portion of the top apron cradle 55 and the apron guide 52 are made of resin.

JP 2001-226838 A JP-A-5-239722

  Since the top apron cradle of Patent Document 1 is entirely made of metal, it is difficult to reduce the weight. In addition, the press work requires a precision press, which increases the cost. If the top apron cradle is made of resin instead of metal as in Patent Document 2, the weight can be reduced and the cost can be reduced. However, the leg piece pressed against the back of the bottom ten server is deformed, and the tencer is used as a support shaft. It cannot be held in parallel.

  The present invention has been made in view of the above-mentioned problems, and its purpose is a top apron cradle in a drafting device for a spinning machine capable of reducing weight and cost while ensuring maintenance and improvement of yarn quality. Is to provide.

To achieve the object, the state top apron cradle of the invention described in claim 1, cradle the body is made of resin, is extended downward from the cradle main body, engaged with a Ten server for the bottom apron in hook for holding the top apron cradle in a predetermined position, the than the resin constituting the cradle main body are formed in a large rigid member rigid proximal end of the hook is fixedly fitted to the lower portion of the cradle body .

In the present invention, the top apron cradle, cradle the body for resin, the whole is lighter than the top apron cradle metal. The top apron cradle is arranged at a predetermined position in engagement with the ten servers hook Gabo Tom apron. When the draft device is driven, the top apron cradle is urged forward of the draft device by driving the bottom apron. However, the top apron cradle is held at a predetermined position by engaging the hook with the ten server. That is, since the hook during driving of the draft device is always in a state of receiving an urging force, if it is made of resin, the rigidity is insufficient and the durability is deteriorated, and it is deformed and is deformed between the cradle and the top roller and the bottom roller. It is difficult to maintain parallelism. However, hook, rather than the resin constituting the cradle main body are formed in a large rigid member rigid, since the base end of the hook is fixedly fitted to the lower portion of the cradle body, the rigidity is secured, the top apron cradle and Parallelism between the top roller and the bottom roller is maintained. Accordingly, it is possible to provide a top apron cradle in a drafting apparatus for a spinning machine that can achieve weight reduction and cost reduction while maintaining and improving the yarn quality.

According to a second aspect of the present invention, in the first aspect of the invention, a reinforcing portion that reinforces an apron support portion of the cradle body is provided, and the reinforcing portion is formed integrally with the hook by the rigid member. . In this invention, since the apron support part is reinforced by the reinforcing part and the reinforcing part is integrally formed with the rigid member constituting the hook, the reinforcing part also contributes to an increase in the rigidity of the cradle body. As a result, it contributes to the improvement of yarn quality including the reduction of variation between the weights.

  According to a third aspect of the present invention, in the invention of the second aspect, the apron support portions are provided on the left and right sides of the cradle body, and the reinforcing portions are connected on the left and right sides. In this invention, compared with the case where a reinforcement part reinforces an apron support part separately in right and left, the improvement rate of the rigidity of a cradle main body becomes high. In addition, the number of parts constituting the top apron cradle is reduced.

  According to a fourth aspect of the present invention, in the second aspect of the invention, the apron support portions are provided on the left and right sides of the cradle body, and the reinforcing portion is divided on the left and right sides. In this invention, since the reinforcement part is divided | segmented into right and left corresponding to the apron support part, since the connection part is unnecessary unlike the case where right and left are connected, the freedom degree of the shape of a cradle main body becomes high.

  ADVANTAGE OF THE INVENTION According to this invention, the top apron cradle in the draft apparatus of the spinning machine which can aim at weight reduction and cost reduction in the state which ensured the maintenance improvement of the yarn quality can be provided.

(A) is a fragmentary sectional side view of the draft device in a 1st embodiment, (b) is a schematic top view showing the relation between a top apron cradle and a middle top roller. (A) is sectional drawing which fractured | ruptured the cradle main body in the center, (b) is the schematic perspective view which looked at the top apron cradle from the hook side. (A) is a schematic plan view which shows 2nd Embodiment, (b) is a schematic perspective view of the member in which the reinforcement part and the hook were integrally formed. The schematic perspective view of the member in which the reinforcement part and hook of another embodiment were integrally formed. Sectional drawing of a prior art.

(First embodiment)
Hereinafter, a first embodiment in which the present invention is embodied in a double spindle integrated draft device will be described with reference to FIGS.

  As shown in FIG. 1A, the draft device 10 is provided with an apron draft unit 12 behind the front roller 11. The front roller 11 includes a front bottom roller 11a and a front top roller 11b. The front bottom roller 11a is supported by a roller stand (not shown), and the front top roller 11b is supported by the weighting arm 13 via a support arm (not shown). In FIG. 1A, the left-right direction of the drawing corresponds to the front-rear direction of the draft device 10, the left side is the front side, and the right side is the rear side.

  The apron draft unit 12 includes a bottom apron 14 and a top apron 15. The bottom apron 14 is wound around a ten server 16, a middle bottom roller 17a, and a lower guide member (not shown). The top apron 15 includes a middle top roller 17b rotatably supported at both ends of a support shaft 18 supported by a weighting arm 13 via a support arm (not shown), and a top apron cradle supported by the support shaft 18. 19 is wound around.

  As shown in FIG. 1B, the top apron cradle 19 includes a pair of left and right aprons on an apron support portion 20a in which a cradle main body 20 is formed in a substantially T-shape and extends in the left-right direction on the tip side of the cradle main body 20. Guides 21R and 21L are provided, and a tensor gauge adjustment piece 22 is provided in the center. Both apron guides 21R, 21L and the tensor gauge adjustment piece 22 are formed separately from the cradle body 20 and attached to the cradle body 20. The apron guides 21R and 21L regulate the movement of the top apron 15 in the width direction. The apron guides 21R and 21L are fixed to the tip end side of the apron support portion 20a so that the apron guides 21R and 21L function as a tensor, and the tips thereof are formed in an arc shape. The tensor gauge adjustment piece 22 adjusts the gap between the ten server 16 and the cradle body 20, that is, the tensor interval.

  As shown in FIG. 1B, the cradle body 20 has an arbor gripping portion 23 formed in the state of extending rearward at the center. As shown in FIGS. 1A and 2A, the arbor gripping portion 23 is formed so as to grip the support shaft 18 at an arc-shaped portion. A hook 24 extends downward from the cradle body 20. As shown in FIGS. 1B and 2B, in this embodiment, a pair of hooks 24 are provided at the proximal end of the arbor gripping portion 23. At least the apron support portion 20a of the cradle body 20 is made of resin, and at least a part of the hook 24 is formed of a rigid member having rigidity higher than that of the resin constituting the cradle body 20, and the hook 24 is made of resin of the cradle body 20. It is fixed to the part. In this embodiment, the cradle body 20 is entirely made of resin, the hook 24 is entirely formed of a rigid member, and the base end (upper end) is fitted and fixed to the cradle body 20. As shown in FIG. 2B, the cradle body 20 is formed in a state in which many ribs are present in order to secure further weight reduction and strength. The cradle body 20 is made of polyamide (nylon), and the rigid member is made of metal (for example, stainless steel).

  As shown in FIG. 1A, the top apron cradle 19 is supported by the support shaft 18 in a state where the arbor gripping portion 23 abuts on the outer peripheral surface of the support shaft 18 and grips the support shaft 18, and an urging force (not shown) By the means, the top apron 15 is held in a state of being urged toward the bottom apron 14 side. Further, the top apron cradle 19 has a hook 24 that abuts against an engaging portion formed on the ten server 16, so that the position accuracy of the tip of the top apron cradle 19 is ensured, and the parallelism of the tip apron cradle 19 It is maintained in a state parallel to the extending direction.

  Next, the operation of the apparatus configured as described above will be described. In the open state in which the pressurization by the weighting arm 13 is released, the top apron cradle 19 is arranged to hold the top apron 15 at a position away from the bottom apron 14. When the weighting arm 13 is disposed at a spinning position where the top rollers 11b and 17b are pressed toward the bottom rollers 11a and 17a, the top apron 15 contacts the bottom apron 14. The bottom apron 14 is rotated by the rotation of the middle bottom roller 17a. Then, the top apron 15 is rotated in synchronization with the bottom apron 14 by contact pressure with the bottom apron 14, and the fiber bundle F is transferred together with the bottom apron 14. In addition, since the rotational speed of the front bottom roller 11a and the front top roller 11b is set larger than the rotational speed of the middle bottom roller 17a and the middle top roller 17b, the fiber bundle F is drafted in the meantime.

  The top apron 15 is guided by the apron guides 21R and 21L on the upper traveling portion, the movement in the width direction is restricted, and the top apron 15 travels at a predetermined position. In the top apron cradle 19, the hook 24 abuts on the engaging portion formed on the ten server 16, whereby the positional accuracy of the tip of the top apron cradle 19 is ensured, and the parallelism of the tip is in the direction in which the ten server 16 extends. Since the parallel state is maintained, the top apron 15 is stably rotated at a predetermined position in synchronization with the driving of the bottom apron 14. Therefore, the quality of the spun yarn is stabilized.

According to this embodiment, the following effects can be obtained.
(1) In the top apron cradle 19, at least the apron support portion 20 a of the cradle body 20 is made of resin, and at least a part of the hook 24 extending downward from the cradle body 20 is more than the resin constituting the cradle body 20. The hook 24 is fixed to the cradle body 20 and is formed of a rigid member having high rigidity. Therefore, it is lighter than a metal top apron cradle. Further, the hook 24 is held at a predetermined position in a state where rigidity is ensured, and the parallelism between the top apron cradle 19 and the top roller and the bottom roller is maintained. Therefore, it is possible to provide the top apron cradle 19 in the drafting device of the spinning machine that can achieve weight reduction and cost reduction while ensuring the maintenance and improvement of the yarn quality.

  (2) The hook 24 is entirely formed of a rigid member. Therefore, as compared with the case where a part is formed of a rigid member, the rigidity is increased, the durability is improved, and the manufacturing is facilitated.

  (3) Since the pair of hooks 24 formed independently are fitted and fixed at predetermined positions of the cradle body 20, the pair of hooks are integrally formed and fixed to the cradle body 20. Manufacturing is easier than in the case.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIGS. This embodiment is different from the first embodiment in that the apron support portion 20a has a reinforcing portion and the protruding position of the hook 24. The same parts as those in the first embodiment are denoted by the same reference numerals and detailed description thereof is omitted.

  As shown in FIG. 3A, the cradle body 20 includes a reinforcing portion 25 that reinforces the apron support portion 20a. As shown in FIG. 3 (b), the reinforcing portion 25 is formed of a side inverted L-shaped bar and is formed integrally with the pair of hooks 24. That is, the reinforcing part 25 is formed in a state where the left and right are connected. As shown in FIG. 3 (a), the reinforcement part 25 is entirely located in the cradle body 20, and the hook 24 protrudes rearward at a position near the arbor gripping part 23 of both apron support parts 20a. Is formed integrally with the cradle body 20. In this embodiment, the reinforcing portion 25 and the hook 24 are formed by bending a stainless steel plate by pressing.

In the top apron cradle 19 of this embodiment, the following effects can be obtained in addition to the same effects as (1) and (2) of the first embodiment.
(4) The top apron cradle 19 includes a reinforcing portion 25 that reinforces the apron support portion 20a. The reinforcing portion 25 is a rigid member and is formed integrally with the hook 24. Accordingly, the apron support portion 20a is reinforced by the reinforcing portion 25, and the reinforcing portion 25 is integrally formed with the rigid member constituting the hook 24, so that the reinforcing portion 25 also contributes to an increase in the rigidity of the cradle body 20. To do. As a result, it contributes to the improvement of yarn quality including the reduction of variation between the weights.

  (5) The apron support portion 20a is provided on the left and right sides of the cradle body 20, and the reinforcing portion 25 is connected on the left and right. Therefore, the rigidity increasing rate of the cradle body 20 is higher than when the reinforcing portion 25 separately reinforces the apron support portion 20a on the left and right sides. Further, the number of parts constituting the top apron cradle 19 is reduced.

(6) Since the reinforcing portion 25 is formed of a bar made of a rigid member having an inverted L-shaped cross section, the bending strength is higher than that of a flat plate.
The embodiment is not limited to the above, and may be embodied as follows, for example.

  O When the apron support part 20a is provided in the right and left of the cradle main body 20, the reinforcement part 25 which reinforces the apron support part 20a may be divided | segmented into right and left as shown in FIG. In this case, unlike the case where the left and right are connected, a connecting portion is unnecessary, so the degree of freedom of the shape of the cradle body 20 is increased.

  The rigid member that constitutes the hook 24 and the reinforcing portion 25 is not limited to stainless steel as long as it has a higher rigidity than the resin that constitutes the cradle body 20. For example, it may be made of a metal other than stainless steel or a fiber reinforced resin, or may be made of a resin having higher rigidity than the resin constituting the cradle body 20. In this case, examples of the resin having higher rigidity than the polyamide resin constituting the cradle body 20 include polycarbonate.

  As a configuration in which the hook 24 and the reinforcing portion 25 are fixed (integrated) with the cradle main body 20, instead of insert molding the resin in which the hook 24 and the reinforcing portion 25 are integrated into the resin, for example, the reinforcing portion 25 is attached to the cradle main body. 20 may be fitted and fixed. In this case, a part of the hook 24 may or may not be fitted to the cradle body 20.

The reinforcing part 25 may be a separate body from the hook 24. For example, in the first embodiment, a plate-like reinforcing portion 25 may be provided on the apron support portion 20a .

  The hook 24 engages with the ten server 16 provided on the bottom apron 14 side to hold the top apron cradle 19 in a predetermined position, and the bottom apron 14, the top apron 15, the middle top roller 17b, and the apron guide The positions of the hooks 24 with respect to the cradle body 20 may be arbitrarily set as long as they do not interfere with 21L and 21R. For example, the hooks 24 may be provided on the left and right end portions on the outer side of the apron support portion 20 a or on the inner side of the arbor gripping portion 23.

  O Instead of providing a pair of hooks 24, one wide single hook 24 may be provided. If the hook 24 is wide, the length of the engaging surface that is engaged in a state parallel to the ten server 16 is increased, and the position accuracy of the tip of the top apron cradle 19 is ensured even if it is not a pair. The degree is maintained in a state parallel to the extending direction of the ten server 16.

  The top apron 15 may be applied to the top apron cradle 19 configured to be wound around the tip of the cradle body 20 without being wound around the tips of the apron guides 21L and 21R. In this case, a convex portion as an apron guide that restricts the displacement of the top apron 15 in the left-right direction may be provided on the upper surface of the cradle body 20.

  The present invention may be applied not only to the two-apart integrated top apron cradle 19 but also to a structure in which four weights of top rollers are supported by one weighting arm 13. For example, the left and right apron support portions 20a of the cradle body 20 are lengthened so that two apron guides 21R and 21L can be fixed to each apron support portion 20a.

The following technical idea (invention) can be understood from the embodiment.
(1) In the invention according to any one of claims 1 to 4, the rigid member is made of a fiber reinforced resin.

  DESCRIPTION OF SYMBOLS 10 ... Draft apparatus, 19 ... Top apron cradle, 20 ... Cradle main body, 20a ... Apron support part, 24 ... Hook, 25 ... Reinforcement part.

Claims (4)

Cradle Body is made of resin, is extended downward from the cradle body, hook for holding the top apron cradle in position in engagement with Ten server for the bottom apron, the resin constituting the cradle body is formed in a large rigid member rigid than the base end of the hook top apron cradle in draft device of a spinning machine, characterized in that it is fixedly fitted at the bottom of the cradle main body. The top apron cradle in the draft device of the spinning machine according to claim 1, further comprising a reinforcing portion that reinforces an apron support portion of the cradle body , wherein the reinforcing portion is formed integrally with the hook by the rigid member.   The top apron cradle in a draft device of a spinning machine according to claim 2, wherein the apron support portions are provided on the left and right sides of the cradle body, and the reinforcing portions are connected to the left and right sides.   The top apron cradle in the draft device of the spinning machine according to claim 2, wherein the apron support portions are provided on the left and right sides of the cradle body, and the reinforcing portion is divided on the left and right sides.