JPH0615371B2 - Coil holder expansion / contraction mechanism - Google Patents

Description

The present invention relates to an expansion / contraction mechanism for a coil holder such as a thin coil having a narrow width (width of 50 mm or less).

(Prior Art) Conventionally, in a coil holder of a thin coil (iron, copper, aluminum, etc.) having a certain coil width or more, for example, 100 mm or more, expansion / contraction operation by a wedge or a link mechanism is performed by a hydraulic force from outside the holder through a rotary joint. A method of using air pressure as a power source is generally adopted.

On the other hand, in the case of a thin plate coil with a narrow width (for example, 50 mm or less), the width of the coil holder is narrow, and if the conventional expansion / contraction mechanism for a wide coil holder is directly applied, there is no practical use. As shown in Fig. 6, a dedicated bobbin 23 is attached to the inner diameter of the coil of the thin plate, and after being integrated with the coil by tightening with a screw 24, etc., the rotary shaft 25 is inserted into the center and the rotary shaft 25 The method of support is adopted.

However, with this method, almost all of the work has to be done manually, and after the rewinding is completed, the bobbin that has been screwed has to be removed, and the complexity remains. Also,
Due to human work, a certain space or more is required in front of the coil stand, which is a major drawback in terms of labor saving, space saving, and automation.

(Problems to be Solved by the Invention) The present invention includes a coil holder having a narrow width in place of the conventional screw tightening method for a coil holder, which has a mechanism for expanding and contracting the coil holder, and the coil holder is fully automated regardless of human labor. The expansion / contraction mechanism is provided.

(Means for Solving the Problem) The present invention is an expansion / contraction mechanism for a coil holder for solving the above-mentioned problems and achieving the object, and is a disk-shaped member which is rotatable around the inner circumference of an annular base plate. A substrate is attached, a shaft is pivotally supported at the center of the substrate, a link plate having a plurality of arms is attached to the surface of the shaft, and a reel segment crimping device is attached to each of the arms via a link mechanism. On the other hand, a plurality of chevron projections are fixedly provided on the back surface of the shaft, and a plurality of extrusion cylinders are further provided on the back surface of the substrate so that the cylinder rods of the extrusion cylinders are brought into contact with the chevron projections. Attaching, connecting a pipe connected from a pressure source supply port formed in the center of the surface of the shaft and an extruding cylinder, and connecting the end of the arm of the link plate and the substrate to a restoring elastic body having a predetermined elasticity. And attach it to the board It is characterized by having a stopper for stopping the rotation of the arm of the link.

(Operation) According to the present invention, when a thin coil is loosely fitted along the outer circumference of the reel segment and then air is sent to the pressure source supply port from the outside, the pushing cylinder acts and is fixed on the back surface of the shaft. The mountain-shaped protrusion is pushed, and the shaft starts to rotate right when viewed from the front, and at the same time, the arm of the link plate also starts rotating right. By this movement, the reel segment crimping device connected to the arm by the link mechanism is pressed against the inner diameter portion of the coil, and the spring inside the crimping device is compressed. When the shaft further rotates, the upper end of the arm hits a stopper provided slightly above the top dead center and stops rotating any more. At the same time, the air supply is also stopped.

Even if the air is cut off and the pressure in the extrusion cylinder disappears, the pressing force of the spring compression force inside the crimping device toward the center of the circle is greater than the tensile force of the restoring elastic body.
It works in the direction to bring the arm of the link mechanism into contact with the stopper,
The reel segment continues to be crimped to the inner diameter of the coil while being fully opened.

When the coil is completely rewound, the force pressing the reel segment disappears, so the spring inside the crimping device expands completely, and this time the shaft of the reel rotates automatically due to the force of the return elastic body, and the reel segment automatically returns to its original position. Is reduced to the position.

In addition, since the base portion of this coil holder is fixed to the coil stand, and the base plate portion and the substrate are rotatably attached via bearings, the substrate to which the pushing cylinder and the like are attached can rotate together with the coil. it can.

(Example) An example of a coil holder of a thin aluminum plate (width 25 mm) hoop material will be described in detail.

In FIG. 1, a circular base plate 17 is arranged on the inner peripheral portion of an annular base plate 15 via a bearing 14. The shaft 10 is pivotally supported at the center of the substrate 17, and the link plate 8 is attached to the surface of the shaft in parallel with the substrate 17. The link plate 8 is provided with arms 8-1 at positions corresponding to the vertices of an equilateral triangle.

The arm 8-1 is connected to the link 6 via the pin 5-1 and the link 6 is connected to the slide bush 3 via the pin 5-2.
Is connected to one end of a link mechanism. The reel segment crimping device includes a slide bush 3, a spring 4 included in the slide bush 3, a crescent-shaped reel segment 1 provided at the other end of the slide bush 3, and a substrate.
A fixed bush 2 fixed to 17 is provided, a slide bush 3 is arranged so as to be slidable in the fixed bush 2, and the bottom of the reel segment 1 is set to abut on the spring 4.

In the embodiment, as shown in FIG. 1B, three pairs of the reel segment pressure bonding devices are arranged on the surface of the substrate 17.

Further, one end of the return elastic body 11 is attached to one of the arms 8-1 of the link plate 8, and the other end of the return elastic body 11 has the predetermined elasticity of the elastic body 11. So that it is attached to the substrate 17. Further, on the opposite side of the arm 8-1 to which the elastic body 11 for return is attached, a stopper 7 is fixed on the substrate 17 so that the arm 8-1 does not rotate too much from a predetermined position.

Further, as shown in FIG. 4, three pairs of mountain-shaped projections 12 are fixedly provided on the back surface side of the substrate 17 of the shaft 10.
12 Extrusion cylinder 13 cylinder rod 13-
Three push-out cylinders 13 are attached to the back surface of the base plate 17 so that the push-up cylinders 1 come into contact with each other. Has been done.

A pressure source supply port 16 is formed on the surface side of the center of the shaft 10 as shown in FIG. 1 (a).
As shown in FIG. 4, three pipes 18 are pierced to the back surface of 10 and the other ends are connected to three extruding cylinders 13, so that air as a pressure source is supplied to the extruding cylinders 13. It has become.

Next, the expansion / contraction mechanism of the coil holder according to the present invention will be described.

FIG. 2 shows a state before mounting the thin plate coil of the hoop material,
The link plate 8 is rotated counterclockwise by the force of the return elastic body 11, and the reel segment 1 is in the most retracted state by the link mechanism. The chain double-dashed line 19 in Fig. 2 is supposed to be the inner diameter of the thin plate coil, but this coil inner diameter causes some variation in the production of the hoop material, so there is enough room for the stroke of the link mechanism so that the hoop material is sufficiently fitted. The outer diameter of the reel segment 1 is preset.

FIG. 5 shows a state in which the main coil holder 21 is attached to the coil stand 20, and the thin plate coil 22 of the hoop material is conveyed to the coil stand by a separate means (not shown).

Next, the inner diameter 19 of the conveyed coil 22 is set outside the reel segment 1 by a separate means in a loosely fitted state (FIG. 2), and at the same time, an air supply nozzle (not shown) attached to the conveying means. No.) is crimp-connected to the pressure source supply port 16 of the shaft 10. Next, as shown in FIG. 4, air is sent to the extruding cylinder 13 through the pipe 18, the cylinder rod 13-1 extends, and the mountain-shaped projections 12 fixed to the shaft that are in contact with the rod tips are respectively pushed. Then, the shaft is rotated to the left (the dotted line in FIG. 4 shows the state in which the extrusion cylinder 13 is driven and the projection 12 is rotated).

Then, as shown in Fig. 1 (b), the shaft is on the front side.
10, the reel segment 1 is pushed out by the link mechanism, and the reel segment 1 is pressed against the inner diameter 19 of the coil 22. At this time,
Even if there is some variation in the inner diameter 19 of the coil 22, the reel segment 1 can sufficiently hold the coil 22 by allowing a margin for the compression of the spring 4.

When the shaft 10 further rotates to the right, the arm 8-1 of the link plate 8 contacts the stopper 7 as shown in FIG. 3, and the rotation of the shaft 10 stops. At this time, the stopper 7 is positioned so that the pin 5 of the link plate 8 exceeds the top dead center and slightly rotates right (2 mm in the embodiment) at the abutting position. At this point, the supply of air to the pushing cylinder 13 is stopped, and the air supply nozzle and the coil transfer means attached to the separate coil transfer means are retracted.

The time required to expand the reel segment of this embodiment is 1 to
It can be achieved in 2 seconds.

Further, in FIG. 3, when the force for rotating the shaft 10 by the pushing cylinder 13 disappears, the link plate 8 is further rotated to the right by the reaction force against the compression of the reel segment 1 to the coil 22, that is, the action of the spring 4. Although a force acts, since the link plate 8 is in contact with the stopper 7, it does not rotate any more, and the reel segment 1 remains almost fully opened and is kept crimped to the coil inner diameter 19. Since the tension of the elastic body 11 for return is set to be smaller than the compressive force of the three pairs of coil springs 4,
The camshaft 10 never rotates in the reverse direction.

As described above, the thin plate coil 22 of the hoop material of FIG. 5 is set on the coil stand 20 via the coil holder 21,
Rewinding of the coil begins. When the rewinding of the coil is completed, the coil disappears, so that the compression force to the reel segment 1 is released, the spring 4 is fully extended, and the elastic body for restoration is used.
The link plate 8 is rotated counterclockwise to the left by the force of 11, and the reel segment 1 is contracted to return to the initial state of FIG.

(Effects of the Invention) The coil holder expansion / contraction mechanism according to the present invention has the following excellent effects.

1. An extremely narrow coil holder can be manufactured.
The width of the aluminum hoop coil holder of this embodiment is 66
Since it has a size of mm, it is possible to install a large number of coil rewinding coil stands in a narrow factory space, saving space and greatly improving productivity.

2. Compressed air is used when expanding the reel segment,
The reel segment is expanded and retained only after being used for 1 to 2 seconds, and it is not necessary to constantly supply the compressed air unlike the rotary joint of the known art.

3. Further, it is not necessary to supply a pressure source when the reel segment is reduced, and the reel segment is automatically reduced.

4. It can be applied not only to aluminum hoop materials, but also to thin plate coils of iron and copper and plastic films.

Although the present invention has been described in connection with an example in which the present invention is applied when rewinding, it is possible to easily form a take-up reel with a scaling function by additionally adding a rotation drive mechanism.

[Brief description of drawings]

Fig. 1 shows the outline of the coil holder, (a) is a sectional view,
(b) is a front view, FIG. 2 is a front view showing a state before the coil is mounted on the coil holder, FIG. 3 is a front view showing a state when the coil is mounted on the coil holder, and FIG. 4 is a coil. FIG. 5 is a plan view, FIG. 5 (b) is a front view, and FIG. 5 (c) is a side view.
FIG. 6 is a schematic view showing a conventional screw-fastened bobbin. 1: Reel segment, 2: Fixed bush 3: Slide bush, 4: Spring 5-1: Pin, 5-2: Pin 6: Link, 7: Stopper 8: Link plate, 8-1: Arm 10: Shaft, 11 : Return elastic body 12: Protrusion, 13: Extrusion cylinder 13-1: Cylinder rod, 14: Bearing 15: Base plate, 16: Pressure source supply port 17: Substrate, 18: Pipe 19: Inner diameter, 20: Coil stand 21 : Coil holder, 22: Thin coil 23: Bobbin, 24: Screw 25: Rotating shaft

Claims (1)

[Claims] 1. A link in which a disc-shaped substrate is rotatably attached to the inner circumference of an annular base plate, a shaft is pivotally supported at the center of the substrate, and a surface of the shaft has a plurality of arms. Install the board,
A reel segment crimping device is provided on each of the arms via a link mechanism, while a plurality of mountain-shaped protrusions are fixedly provided on the back surface of the shaft, and a plurality of extrusion cylinders are provided on the back surface of the substrate. The cylinder rod of the extrusion cylinder is attached so as to abut against the chevron projection, and a pipe connected from the pressure source supply port formed at the center of the surface of the shaft is connected to the extrusion cylinder, and the end of the arm of the link plate is connected. An expansion / contraction mechanism for a coil holder, comprising: a return elastic body having a predetermined elasticity and a return elastic body, and a stopper for stopping rotation of a link arm provided on the board.