JPH0218032Y2 - - Google Patents

Description

[Detailed Description of the Invention] (A) Field of Industrial Application The present invention relates to a spindle collet for an automatic doffing device in a yarn winding machine.

(B) Background technology In yarn winding machines, doffing of a full package cage is mostly done manually by grasping the package cage and pulling it out. The vines cannot be pulled out easily.

In addition, even in the case of mechanical doffing devices, conventional devices have been used to grasp the outer periphery of the package cage and pull it out, as in the case of manual doffing.

(C) Problems to be solved by the invention For this reason, the package is susceptible to surface stains, deformation, and product damage. Moreover, conventional mechanical doffing devices have extremely complex structures.

The present invention eliminates the above-mentioned drawbacks and provides a spindle collet with a simple structure that does not cause deterioration in quality such as staining or deformation of the package cage or damage to the filament, and also enables automatic doffing. The purpose is to

(D) Means for solving the problem The structure of the present invention to achieve the above purpose is as follows. That is, in a spindle collet in which a plurality of long fingers are attached in the longitudinal direction of the collet at equal intervals along the circumferential direction, a part of the plurality of fingers is reciprocated along the length direction. A plurality of claw members are disposed on the outer periphery of the reciprocating finger at intervals in the axial direction, the front free end of which swings outward in conjunction with the reciprocating motion, and is capable of abutting against the rear end surface of the winding bobbin. This is what was established.

(E) Effect The arm of the extrusion mechanism reciprocates along the axial direction, and the reciprocating finger that engages with the arm moves in the front-back direction. When the reciprocating finger starts moving forward, the ejector pin, which has been controlled by the cam plate, moves to the cam concave surface of the cam plate, sinks under the action of the push-down spring, and retreats from the rear free end of the claw member. do. The pawl member swings rearward due to the elastic force of the pawl spring, and its front free end portion is lifted up, and its front end surface abuts and engages with the rear end surface of the take-up bobbin. and,
As the reciprocating finger advances further, the bobbin is pushed forward. Complete withdrawal of the bobbin by the pawl member is achieved by sequentially performing the above-mentioned pushing operation from the rearmost pawl member to the foremost pawl member for each forward and backward movement.

(F) Embodiment The present invention will be described below based on an embodiment shown in the drawings. The winding machine A has a spindle collet 10.
There are those in which a long bobbin is attached to the bobbin, and there are those in which a plurality of bobbins (three in the example shown in Fig. 1) are attached in series along the axial direction, and the filament is wound on each bobbin. However, this example shows the latter case. In Figures 2 to 4, the spindle collet 10 is provided with a large number of grooves 11 at equal intervals along the circumferential direction, and each of these grooves has a long groove along the front and rear (left and right in Figure 2) direction of the collet. Finger 2 is attached. The finger 2 has a mushroom-shaped cross section perpendicular to the length direction, and side grooves 25 extending along the length direction are formed on both side surfaces of the leg portion. The finger 2 is fixed to the collet 10 and is connected to the side groove 2.
A finger key 8 protruding into the collet 10 prevents the collet 10 from being pulled out in the radial direction.

According to the present invention, some of these fingers (according to the embodiment, three fingers are arranged at equal intervals along the circumference) are reciprocating fingers 20 that can move back and forth along their length. The reciprocating finger 20 is provided with a flange 21 projecting outward at the rear end portion, and claw member mounting grooves 22 are formed at predetermined intervals in the axial direction. 30 are arranged.

The claw member 30 has a T-shaped block shape, has an outer piece 31 extending along the length of the reciprocating finger 20, and is pivotally supported by the base end portion of the leg 32, so that it can swing freely in the front and back direction. ing. The claw member 30 is the outer piece portion 3
1 is in a horizontal state, its top surface is the reciprocating finger 2
The claw member is accommodated in the claw member mounting groove 22 so as to be approximately at the same height as the outer peripheral surface of the claw member (FIGS. 3 and 5). The front free end 31a of the outer piece 31 of the claw member 30 is biased by the claw spring 3 from the bottom direction. Also,
Reciprocating finger 20 facing rear free end 31b
is provided with a radial through hole 23 that extends through the finger and has an outer shell portion 23a projecting out in the form of an eave. is installed. The extrusion pin 4 is
A push-down spring 4b is installed between the flange portion 4a extending halfway in the lengthwise direction and the eave-like outer shell portion 23a, and is always springing in the axial direction. The extrusion pin 4 is connected to the reciprocating finger 20 and the cam plate 5.
When the cam plate 50 is at the rearmost position with respect to the finger 20 due to the forward and backward movement of 0, the cam plate 50
rides on the top surface 53 (FIG. 6) of the claw member 30, pushes out the rear free end 31b of the claw member 30 from inside, and serves to keep the outer piece 31 of the claw member 30 horizontal (the fifth figure).

The cam plate 50 is accommodated at the bottom of the groove 11 of the collet 10 in which the reciprocating finger 20 is accommodated,
It is long along the axial direction and is slidable in the length direction. A plurality of cam concave surfaces 52 are formed on the top surface 51 at intervals that match the intervals of the claw member mounting grooves 22 in the length direction. The front side (left side in FIG. 3) of the cam concave surface 52 is an inclined upward surface. Further, the front part of the cam plate 50 has an extrusion mechanism 4.
A clamping notch 53 that can be engaged with the arm 45 of 0 is provided.

Further, as a reciprocating means for the reciprocating finger 20, a notch groove 24 provided at the lower part of the front side (left side in FIG. 2) of the finger, and an arm 4 engaged with the groove.
An extrusion mechanism 40 including 5 is formed. Extrusion mechanism 4
0 is an air cylinder 41 attached to the front end of the shaft center of the collet 10, an air pipe 42 that sends air into the cylinder 41 from behind, and a piston rod 43 that moves forward by pressurizing air into the cylinder 41.
and a spring 44 that urges the piston rod rearward.
It is attached to the front end portion of the piston rod 43, is arranged to face the clamping notch 53 of the cam plate 50 and the notch groove 24 of each reciprocating finger 20, and extends along the bottom wall of the groove 11 of the collet 10 in the radial direction. The arm 45 is inserted through the through hole 12. The hole 12 is a long hole extending in the axial direction to allow the arm 45 to move back and forth.

The arm 45 has a bifurcated tip to hold the cam plate 50 and the reciprocating finger 20 therebetween.
The width of the clamping notch 53 of the cam plate 50 along the axial direction is set to a dimension that does not have a margin in the same direction with respect to the width of the arm 45, but the width of the notch groove 24 of the reciprocating finger 20 in the axial direction The width is wider than that, and there is enough room for the arm 45 to slide in the front and back direction.

The collet 10 is tightly fitted and fixed to the spindle shaft 1, and the spindle shaft 1 is rotatably supported by the housing 5 via a bearing 6, and is rotationally driven via a gear train 7 by a drive source not shown. Ru.

The operating state will be explained above.

When the winding bobbin B is attached to the collet 10 and the thread body is being wound, the extrusion mechanism 40 is not operated, the arm 45 is biased by the spring 44 and maintains the rearmost position, and the reciprocating finger 20 and place the cam plate 50 at the rearmost position. Therefore, the push-out pin 4 rides on the top surface 51 of the cam plate 50 and is lifted, and the top pushes out the rear free end portion 31b of the claw member 30, keeping the outer piece portion 31 horizontal. Therefore, the claw member 31 does not become an obstacle to the insertion of the bobbin B, nor does it come into pressure contact with the inner surface of the bobbin B during operation.

When a package is formed and doffed, air is intermittently fed into the cylinder 41 by an air pump not shown. That is, during air supply, the piston rod 43 is pushed forward, and when the air supply is stopped, the piston rod 43 is moved backward by the action of the spring 44, and the forward and backward movements are repeated. This causes the reciprocating finger 20 and the cam plate 50 to be displaced in the front-rear direction. That is, when the arm 45 moves forward, the cam plate 50 moves forward in synchronization with the arm 45, but the operation of the reciprocating finger 20 is delayed by the margin width of the notch groove 24. Therefore, at the beginning of the movement of the arm 45, only the cam plate 50 moves forward, and its cam concave surface 52 is moved directly below the push-out pin 4, causing the push-out pin 4 to sink. During the first advance of this displacement, the rear end surface of the last bobbin B is pushed forward (in the bobbin pulling direction) by the flange 21 at the rear end of the reciprocating finger 20. Bobbins other than the last one are pushed out by this last bobbin. When the finger 20 moves forward for the second time, the ejector pin 4 is disengaged from the cam 13, so that the ejector pin 4 is urged by the push-down spring 4b and sinks, and the pawl spring 3 is actuated to move the rearmost The claw member is swung backward, and its front free end 31
Raise a higher than the outer peripheral surface of the finger. Therefore, this front free end portion 31a is connected to the finger 20.
When the bobbin moves forward, it catches on the rear end surface of the bobbin B and pushes the bobbin further forward. Further, when the bobbin is moved forward for the third time, the bobbin is pushed out in the same manner as described above by the claw member located on the next front side.

In this way, the bobbins are pushed forward one after another by the respective claw members, and all the bobbins are completely pulled out. When the withdrawal of the bobbin B is completed, the operation of the extrusion mechanism 40 is stopped, and the arm 45 returns to its original rearmost position.

(G) Effect of the invention As described above, the present invention provides a spindle collet in which a plurality of long fingers are attached in the longitudinal direction of the collet at equal intervals along the circumferential direction. The reciprocating finger is moved reciprocatingly along the length direction, and the front free end swings upward in conjunction with the reciprocating motion at intervals in the axial direction on the outer periphery of the reciprocating finger. Since a plurality of claw members that can come into contact with the rear end surface are provided, when doffing, as the reciprocating finger moves back and forth,
Each claw member arranged along the axial direction on the winding bobbin operates in sequence to automatically push out the bobbin. Therefore, there is no possibility of dirt, deformation, or damage to the surface of the package cage, and automatic doffing can be easily performed while maintaining high quality. Furthermore, the device of the present invention has a simple mechanism, is available at low cost, and has many advantages, including no failures.

[Brief explanation of the drawing]

Figure 1 is a side view of the winder according to the present invention, Figure 2 is a side view of the winder according to the present invention;
The figure is a longitudinal sectional front view of a spindle collet showing an embodiment of the present invention, Fig. 3 is an enlarged longitudinal sectional front view of the main part, Fig. 4 is a cross-sectional view taken from Fig. 2, and Fig. 5 is a claw member during operation. FIG. 6 is a front view showing the operating state of the collet, and FIG. 6 is a perspective view of the main parts of the collet. A... Winding machine, B... Winding bobbin, 1... Spindle shaft, 3... Pawl spring, 4... Extrusion pin, 1
0... Collet, 13... Cam, 20... Reciprocating finger, 22... Claw member mounting groove, 24... Notch groove, 30... Claw member, 31a... Front free end, 4
0... Extrusion mechanism, 41... Cylinder, 43... Piston rod, 45... Arm, 50... Cam plate.

Claims (1)

[Scope of utility model registration request] In a spindle collet in which a plurality of long fingers are attached in the longitudinal direction of the collet at equal intervals along the circumferential direction, some of the plurality of fingers are reciprocated along the length direction, and this reciprocating motion A front free end swings outward in conjunction with the reciprocating motion at an interval in the axial direction on the outer periphery of the finger;
A spindle collet characterized in that a plurality of claw members are provided that can come into contact with the rear end surface of a winding bobbin.