JP3423677B2 - Striatal delivery device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a delivery device for a striated body, and more particularly, to a delivery device for a striated body suitable for delivering a large number of striated bodies. Things. 2. Description of the Related Art In order to feed a wire with a constant tension in a wire feeding device, conventionally, a desired amount of braking torque is applied to each of the delivery bobbins by an electromagnetic brake or the like, or immediately after the delivery bobbin. Usually, measures such as providing a dancer roller device to control the tension during traveling to a desired magnitude are taken. [0003] In the case of using an electromagnetic brake, when the number of sending bobbins is extremely large, the number of electromagnetic brakes is also increased, so that the cost becomes enormous and the control thereof is also complicated. There is a drawback such that it is extremely difficult to perform the operation uniformly between the delivery bobbins. In particular, when the thin wire is fed with a low tension, the above-described difficulty tends to be further increased. SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the invention as set forth in claim 1 has a disk-like surface having a vertical surface. A frame disc that is driven to rotate about the center axis of the disc;
A plurality of delivery bobbins provided around at least one surface of the frame disk so as to be rotatable around axes perpendicular to the plate surface, and a cylindrical brake drum fixed coaxially to the delivery bobbin A brake arm having one end pivotally supported by the frame disk and rotatably provided in a vertical plane, and a weight having a desired weight provided axially movable at the other end; and a brake arm fixed to the brake arm. And a brake shoe that makes frictional contact with the brake drum, and wherein the inclination angle of the brake arm is set to be the same for each of the delivery bobbins. . Referring to FIG. 1, a disc-shaped frame disc 2 preferably has a pair of under-rollers 22 such that both front and back surfaces are at least one vertical surface.
One of the under rollers has an outer peripheral surface covered with rubber, so that the frame disk can be driven to rotate. The frame disk 2 is provided with a center hole 21 at the center thereof, and a plurality of shafts perpendicular to the plate surface are provided in the peripheral portion, preferably at equally divided positions on the outer periphery. Will be arranged. The striated body 1 delivered from each delivery bobbin 3 is guided by a guide roller 5 provided at an appropriate position.
To the downstream, for example, a twisting die of a twisting machine (not shown). [0007] The axis of the delivery bobbin 3 extends through the frame disk 2 to the back surface, and a plurality of delivery bobbins 3 may be rotatably provided on the back surface as well as the front surface. Alternatively, another axis may be provided at a position on the back side that is angularly displaced from the front side. At a position near the outer peripheral edge of the frame disk 2 (to be precise, outside the brake drum 31 described later),
One rotating shaft 44 is provided for each delivery bobbin 3 vertically to the frame disk 2, and one end of the brake arm 4 is pivotally supported by the rotating shaft 44 to be rotatable in a vertical plane. Provided. Each rotation shaft 44 for each delivery bobbin 3
Are located on one circumference concentric with the frame disk 2, and the positional relationship of each brake arm 4 with respect to each delivery bobbin 3 is the same for all delivery bobbins 3. [0010] A screw portion 41 is formed at the other end (middle position) of the brake arm 4, and a weight 42 having a desired weight is screwed into the screw portion 41. Is fixedly provided with a brake shoe 43. A cylinder-shaped brake drum 31 is coaxially fixed to the delivery bobbin 3 on the side close to the frame disk 2. The above-described brake arm 4 hangs down due to gravity, and as a result, the brake shoe 43 contacts the brake drum 31 from above as shown in FIG. This brake device applies tension to the filament 1 sent out from the delivery bobbin 3. Let us now examine the magnitude of the tension applied by the brake device with reference to FIG. The weight 42, the brake shoe 4 from the rotation shaft 44
A and b respectively, and brake drum 3
1 is r, the weight of the weight 42 is w, the inclination angle of the brake arm 4 with respect to the vertical direction is θ, and the tension generated in the striatum 1 is T. The counterclockwise torque by the weight w is aw · s
inθ, which is the reaction force K from the brake shoe 43
With the clockwise torque bK. That is, aw · sin θ = bK (1) On the other hand, if the friction coefficient between the brake shoe 43 and the brake drum 31 is μ, the torque for braking the rotation of the delivery bobbin 3 is μKr, which is μKr. Since the radius of the winding layer of the striated body is equal to TR as R, μKr = TR (2) From the equations (1) and (2), T = μKr / R = μawr (sin θ) / bR (3) is obtained. From this equation, when the feeding of the filament 1 proceeds, the radius R of the winding layer decreases and the tension T increases. Therefore, the angle θ is reduced so as to adjust the radius, and the value of sin θ is adjusted accordingly. It turns out that it has to be smaller. In the apparatus of the present invention, the adjustment at this time is exquisite. That is, the entire frame disk 2 is rotated counterclockwise in FIG. 1 at a very low speed. In this case, the inclination angle θ of the brake arm 4 for each of the delivery bobbins 3 changes at the same time with the same degree. As a driving mechanism for rotating the frame disk 2, a friction band such as rubber may be provided on the outer peripheral portion of the under roller 22 shown in FIG. 1 and driven by this, or not shown. However, as a modified embodiment of the present invention, the frame disc 2 may be supported by a hollow shaft passing through the center thereof, and the hollow shaft may be driven to rotate. In this case, the under roller merely supports. The striated body 1 may be formed by making an appropriate hole in the frame disk 2 and passing it. As described above, it is a major feature of the present invention that the tension can be simultaneously changed and adjusted simply by rotating the frame disk 2 irrespective of the number of delivery bobbins. Thus, as shown in FIG. 4, when the brake arm 4 is horizontal, the tension can be maximized, and when it is vertical, the tension can be minimized (close to zero). Since the device of the present invention is a device for sending out a striated body, it can be used to construct various twisting devices. In this case, if it is necessary to insert a tension line at the center, the tension line may be configured so that the tension line passes through the center of the frame disk 2. According to the present invention, there is no need to separately provide an electromagnetic brake or a dancer pulley device for each delivery bobbin as in the prior art. There is an advantage that the tension can be adjusted all at once by an extremely simple operation of slightly rotating only the shaft. Further, since the delivery bobbin is provided on the peripheral portion of one frame disk, the number of bobbins that can be mounted can be easily increased or decreased by enlarging or reducing the radius of the frame disk. Since the center portion of the wire is empty, the drive shaft of the stranded wire machine used here and a tension member can be passed therethrough.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing an apparatus according to an embodiment of the present invention. FIG. 2 is a side sectional view of a delivery bobbin mounting portion. FIG. 3 is a front view showing a brake device provided on a delivery bobbin. FIG. 4 is a simplified diagram illustrating a change in tension due to an inclination of a brake arm. [Description of Signs] 1 Striatal body 2 Frame disk 21 Center hole 3 Delivery bobbin 31 Brake drum 4 Brake arm 41 Screw portion 42 Weight 43 Brake shoe 44 Rotating shaft 5 Guide roller θ Brake arm tilt angle w Weight 42 Weight T Striatal tension

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65H 59/04

Claims (1)

(1) A frame disk (2) which is formed into a disk shape having a vertical surface and is rotated around a central axis of the disk.
A plurality of delivery bobbins (3) rotatably provided around at least one surface of the frame disk (2) about an axis perpendicular to the plate surface, and coaxial with the delivery bobbin (3). And a columnar brake drum (31) fixedly mounted thereon, one end of which is rotatably provided in the vertical plane supported by the frame disk (2), and the other end of which has a desired weight ( 42) has a brake arm (4) provided movably in the axial direction, and a brake shoe (43) fixed to the brake arm (4) and in frictional contact with the brake drum (31). Delivery bobbin (3)
Wherein the inclination angle (θ) of the brake arm (4) is all set to be the same.