JPH0745577Y2 - Top roller position setting device for spinning machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a top roller position setting device in a spinning machine.

[Prior Art] Generally, in a spinning machine such as a rough spinning machine and a fine spinning machine, two or more sets of rollers having different surface speeds are installed, and the difference in the surface speeds is used to successively thin the fiber bundle. The device is widely used. In this type of drafting device, top rollers such as a front top roller, a middle (second) top roller, and a back top roller are supported by a top roller support member which is fixed to a weighting arm by a bolt, and a front bottom roller,
It is adapted to be pressed by bottom rollers such as a middle (second) bottom roller and a back bottom roller. In general, the top roller support members for the middle top roller and the back top roller are capable of changing and adjusting the roller gauge, so that the fixed position with respect to the weighting arm needs to be changeable in the longitudinal direction of the weighting arm. Then, a long hole extending along the longitudinal direction is formed on the upper wall of the waiting arm, and the top roller support member is moved to a predetermined position together with the tightening bolt with the tightening bolt loosened, and then tightened with the bolt. The top roller support member is fixed at a predetermined position.

[Problems to be Solved by the Invention] However, when fixing the top roller support member to a predetermined position, the top roller support member is twisted around the bolt by the tightening torque of the bolt and is supported by the roller support member. There is a problem that the parallelism of the roller with respect to the bottom roller deteriorates, and the yarn quality deteriorates. The parallelism of the front top roller and the second top roller to the bottom roller greatly affects the yarn quality. Especially in the so-called pendulum type weighting arm that automatically adjusts the levelness of the top roller,
As shown in FIG. 10, the top rollers 1 to 3 extend along the longitudinal direction of the frame 4 of the weighting arm, and the base end of the arm 5 is swingably arranged in a plane orthogonal to the weighting arm. Arms 6 supported by the tip ends of the first to 7th arms and supporting the second top roller 2 with respect to the arm 5 supporting the front top roller 1.
Are arranged in a straddle state, the arm 6 supporting the second top roller 2 is twisted when the arm 6 is twisted.
Comes into contact with the arm 5 supporting the front top roller 1, and the arm 5 supporting the front top roller 1 is also displaced, so that the parallelism of the front top roller 1 to the bottom roller is deteriorated.

As a method of preventing the displacement of the top roller supporting member due to the tightening torque of the bolt, the outer width of the top roller supporting member is formed to be equal to the inner width of the frame 4 of the waiting arm, and the top roller supporting member is formed only in the longitudinal direction of the frame. It is conceivable to allow movement. However, since the frame of the weighting arm and the top roller support member are generally formed by bending by press molding, it is difficult to form the outer width of the top roller support member equal to the inner width of the weighting arm. In addition, not only the manufacturing cost will increase with methods other than press molding,
Mass production is difficult.

The present invention has been made in view of the above problems,
The purpose is to reliably prevent the top roller supporting member from being displaced by the tightening torque of the bolt when the top roller supporting member is tightened and fixed, thereby deteriorating the parallelism of the top roller to the bottom roller. An object of the present invention is to provide a top roller position setting device for a spinning machine that is easy to manufacture.

[Means for Solving the Problems] In order to achieve the above object, in the present invention, the bolts are fixed to the upper wall of the frame of the weighting arm which is fixed by bolts with the top roller support member abutting the lower surface. A long hole is formed so that the position can be adjusted in the longitudinal direction of the weighting arm, and an insertion portion through which the bolt is inserted and a portion of the frame are engaged between the bolt and the top roller support member. A set piece including a restriction portion that restricts movement of the weighting arm in the width direction and a fitting piece that engages with a fitting portion formed on the top roller support member is interposed.

According to the second aspect of the present invention, a pendulum type weighting arm is adopted as the weighting arm, the set piece is placed on the upper surface of the frame, and a bolt insertion portion is formed on the main body. The restriction portion has the same width as the hole and is fitted into the long hole, and the fitting piece is fitted into the fitting hole formed in the top roller support member.

[Operation] In the present invention, the set piece is interposed between the top roller support member and the bolt, and the bolt of the set piece is engaged with the fitting portion formed on the top roller support member. The top roller support member is fixed to a predetermined position of the frame of the weighting arm by tightening. Since a part of the set piece is engaged with a part of the frame and the widthwise movement of the weighting arm is restricted, the tightening torque of the bolt when tightening the bolt is applied to the top roller support member. Even if it works
Twisting and displacement of the top roller support member due to the tightening torque is reliably prevented by the action of the fitting piece of the set piece engaged with the fitting portion of the top roller support member.

Further, in the invention according to the second aspect, the restriction portion of the set piece is fitted into the long hole formed in the frame of the weighting arm to restrict the movement in the width direction, and the fitting piece supports the top roller. It fits in the hole formed in the member. Therefore, when the top roller support member is fixed to a predetermined position of the frame of the weighting arm without adding any change to the frame of the weighting arm or the top roller support member by simply adding the set piece, The roller supporting member is prevented from being twisted and displaced by the tightening torque of the bolt.

[Embodiment 1] An embodiment in which the present invention is embodied in a pendulum type weighting arm will be described below with reference to FIGS. The same parts as those of the conventional device will be described with the same reference numerals.
The weighting arm 8 has a frame 4 formed in an inverted U-shaped cross-section with an open bottom, and is rotatably supported by a support shaft 9 at its base end as shown in FIGS. In the state in which the frame 4 is placed in contact with the frame 4 shown in the figure, each of the top rollers 1 to 3 supported by the weighting arm 8 is a bottom roller (not shown).
When the lever 10 is held in a locked state at a pressurizing position where it is pressed to, and the lever 10 is pivoted upward as shown in FIG. 1, the locked state is released.

The upper wall 4a of the frame 4 is formed with a long hole 12 into which a bolt 11 for fastening and fixing the second top roller 2 and the back top roller 3 is inserted. Second top roller 2
The top roller support member 13 that supports the support roller 14 is fixed to the frame 4 by the bolts 11.
And an arm 6 supported at the base end by a support pin 15 provided at the lower end of the support bracket 14,
As shown in the figure, the arm 6 is arranged so as to straddle the arm 5 supporting the front top roller 1. Further, the top roller supporting member for the back top roller 3 is also constructed in substantially the same manner as the top roller supporting member 13. On the other hand, the arm 5 supporting the front top roller 1 has its base end supported by a support pin 16 fixed to the frame 4,
The frame 4 is immovable in the longitudinal direction.

Fitting holes 18 and 19 are formed in the upper wall of the support bracket 14 at the mounting position of the load spring 17 interposed between the arm 6 and the arm 6 and the mounting position of the bolt 11. The periphery of is bent downward. One fitting hole 18 serves as a fitting portion, and the other fitting hole 19 is fitted with a nut 20 into which the bolt 11 is screwed. The support bracket 14 is clamped and fixed to the frame 4 with the set piece 21 interposed between the support bracket 14 and the bolt 11. As shown in FIGS. 1 and 4, the set piece 21 is placed on the upper surface of the frame 4 and has a main body 22 in which an insertion hole 22a as a bolt insertion portion is formed, and the thickness of the main body 22 is lower than the main body 22. Body 22 in position
Restricting portions 23a, 23b extending on both front and rear sides and having the same width as that of the elongated hole 12, and a fitting portion that is bent downward from the tip of the restricting portion 23a and engages with the fitting hole 18 of the support bracket 14. It consists of a joint piece 24. Since the diameter of the fitting hole 18 is larger than the width of the long hole 12, the width of the fitting piece 24 is larger than the width of the restriction portion 23a, but the connecting portion between the fitting piece 24 and the restriction portion 23a is the width of the long hole 12. It is formed slightly narrower. And set piece 21
When assembling, the fitting piece 24 is inserted into the long hole 12 in a state where the set piece 21 intersects the longitudinal direction of the frame 4, and then the set piece 21 is arranged in parallel with the frame 4. It has become so.

Next, the operation of the device configured as described above will be described.

Second and back top rollers for gauge adjustment, etc.
To change the position of 3, loosen bolt 11 and
1 is made movable along the long hole 12, the support bracket 14 of the top roller support member 13 is slid along the longitudinal direction of the frame 4 to be arranged at a predetermined position, and then the bolt 11 is tightened at that position. I do. As shown in FIGS. 3 to 5, in the set piece 21, the main body 22 is placed on the upper surface of the frame 4, and both the restricting portions 23a and 23b are fitted into the elongated hole 12 and correspond to the support bracket 14. Placed in the position
The frame 4 is held in a state where it cannot be moved in the width direction. Further, in a state where the bolt 11 penetrating the insertion hole 22a and the elongated hole 12 is screwed into the nut 20 of the support bracket 14, both sides of the fitting piece 24 are supported by the support bracket 14 as shown in FIG.
It is in a state of fitting with the fitting hole 18 of. Even if the bolt 11 is tightened in this state and a twisting force acts on the support bracket 14 by the tightening torque of the bolt 11,
The movement of the support bracket 14 is completely blocked by the set piece 21. Therefore, when the tightening of the bolt 11 is completed, the support bracket 14 and the arms 6 and 7 supported by the support bracket 14 are held in a state parallel to the frame 4,
The parallelism of the second and back top rollers 2 and 3 supported by the tips of the arms 6 and 7 to the bottom roller is maintained.

Further, as shown in FIG. 5, the arm 6 for the second top roller 2 supported by the support bracket 14 is arranged so as to straddle the arm 5 for the front top roller 2, and the inner surface of the arm 6 and the arm 6 The gap δ with the outer surface of 5 is generally 0.5 m
Although it is very small, such as m or less, since the arm 6 is held in parallel with the frame 4 as described above, the arm 6 does not come into contact with the arm 5, and the automatic centering action by the arms 5 and 6 can be performed smoothly. Be seen.

Pendulum type weighting arm support bracket
The fitting hole 18 is originally formed in 14 and the long hole 12 of the frame 4 is also formed in the conventional device. Therefore, by forming the set piece 21 corresponding to the fitting hole 18 and the elongated hole 12, it can be applied to the conventional pendulum type weighting arm without modification.

[Second Embodiment] Next, a second embodiment will be described with reference to FIGS. In this embodiment, unlike the pendulum type as the weighting arm 1, each top roller supporting member 25 for supporting the top rollers 1 to 3, etc. at the tip is fixed to the upper wall 4a of the frame 4 by the bolts 11 at its base end. The point that the type of weighting arm 1 is embodied is greatly different from the above embodiment. Conventionally, in this type of weighting arm 1, each top roller support member 25 has a set piece.
Since there is no portion that can be engaged with the fitting piece 24 of 21, a fitting hole 26 that can be engaged with the fitting piece 24 of the set piece 21 is newly provided in the top roller support member 25 as shown in FIG. Has been formed. Further, the fitting piece 24 is formed so that its width is the same as that of the restriction portion 23a. Also in the case of this embodiment, even if a twisting force acts on the top roller supporting member 25 by the tightening torque when tightening the bolt 11, the action of the set piece 21 causes the top roller supporting member 25 to operate similarly to the above embodiment. The movement is blocked, and the parallelism of the top roller to the bottom roller is maintained.

The present invention is not limited to the above embodiment,
For example, as shown in FIG. 8, a notch 22b may be formed in the main body 22 of the set piece 21 to open the insertion hole 22a laterally. With such a configuration, when modifying the conventional device, the set piece 21 can be attached by loosening the bolt 11 to some extent without completely removing it. Also, the regulation unit 23
Set a and 23b on only one side, or, as shown in FIG. 9, set a pair of restriction portions 27 that are bent and formed at both sides of the main body 22 of the set piece 21 at intervals substantially equal to the outer width of the frame 4. The width of the fitting piece 24 and the connecting portion of the fitting piece 24 and the main body 22 may be made smaller than the width of the long hole 12 while the piece 21 is attached to the frame 4 in a fitted state. Further, as a fitting portion on the top roller supporting member side, a fitting convex portion is formed instead of the fitting hole, and a fitting portion having a shape that engages with the fitting convex portion is formed on the set piece 21 side, In the pendulum type weighting arm, a fitting portion corresponding to the fitting portion of the set piece 21 may be newly provided in addition to the fitting hole 18 as a fitting portion on the support bracket 14 side. Further, the set piece 21 may not be provided between all the top roller supporting members, but may be provided only in a portion corresponding to the front top roller and the second top roller.

[Advantages of the Invention] As described in detail above, according to the present invention, a set piece that holds the weighting arm in a widthwise restricted state is interposed between the top roller support member and the bolt. Even if the tightening torque of the bolt acts on the top roller support member when tightening the bolt, the top roller support member may be twisted and displaced by the tightening torque.
This is reliably prevented by the action of the fitting portion of the set piece engaged with the fitting portion of the top roller support member, and the parallelism of the top roller with respect to the bottom roller is maintained, so that deterioration of yarn quality is prevented.

Further, according to the second aspect of the invention, the set piece is simply added without changing the frame of the weighting arm or the top roller supporting member.
When fixing the top roller support member to the predetermined position of the frame of the weighting arm, the top roller support member is securely prevented from being twisted and displaced by the tightening torque of the bolts, and the parallelism of the top roller to the bottom roller is maintained. As a result, deterioration of yarn quality is prevented.

[Brief description of drawings]

1 to 5 show a first embodiment embodying the present invention. FIG. 1 is an exploded perspective view, FIG. 2 is a partial perspective view, FIG. 3 is a partially cutaway side view, and FIG. 4 is an enlarged view. Partial sectional view, FIG. 5 is an enlarged sectional view taken along the line AA of FIG. 3, and FIGS. 6 and 7 show the second embodiment.
FIG. 6 is a side view, FIG. 7 is a partial sectional view, FIGS. 8 and 9 are perspective views of a modified set piece, and FIG. 10 is a partially cutaway side view of a pendulum type weighting arm of a conventional device. Frame 4, upper wall 4a, arms 5-7, weighting arm 8, bolts 11, elongated holes 12, top roller support members 13,2
5, support bracket 14, fitting holes 18 and 26 as fitting portions, set piece 21, main body 22, insertion hole 22a as insertion portion, restriction portions 23a, 23b and 27, fitting piece 24.

Claims (2)

[Scope of utility model registration request] 1. A long hole for adjusting a fixing position of the bolt in a longitudinal direction of the weighting arm is formed in an upper wall of a frame of the weighting arm which is fixed by a bolt in a state where the top roller supporting member is in contact with the lower surface. Then
Between the bolt and the top roller support member, an insertion part through which the bolt is inserted, a restriction part that engages with a part of the frame to restrict the movement of the weighting arm in the width direction, and the top roller support. A top roller position setting device in a spinning machine, in which a set piece including a fitting portion formed on a member and a fitting piece that engages is interposed. 2. The weighting arm is a pendulum type weighting arm, and the set piece has the same width as that of the main body on which the bolt insertion portion is formed and which is placed on the upper surface of the frame. The top roller position setting device for a spinning machine according to claim 1, wherein the top roller position setting device comprises a restriction portion fitted in the elongated hole and a fitting piece fitted in a fitting hole formed in the top roller supporting member.