JPH024743Y2 - - Google Patents

Description

[Detailed Description of the Invention] -Field of Industrial Application- This invention relates to a winding machine for manufacturing air-core coils, and in particular to the structure of its forming head.

- Conventional technology and problems - Air-core coils are formed by grasping the tip of a supplied wire and winding it around a rotating needle, but because the wire used is thin, the coil is not positioned at the tip of the supplied wire. While misalignment is likely to occur, the coil itself is small and the winding pitch is small, so there is a problem in that the wire must be held at a precise position on the needle, and with conventional equipment, particularly thin wire is used. In this case, there were problems such as incorrect grasping of the wire and variations in the winding pitch at the beginning of winding the coil.

-Purpose of the invention- This invention was made for the purpose of providing a molding head with a compact structure that solves the above-mentioned problems.

- Means for Achieving the Object - To explain using the reference numerals of the illustrated embodiments, the forming head 2 of this invention is provided with a sleeve 23 that is movable back and forth coaxially with a rotating spindle 17 in which the needle head 12 is fitted. The wire 5 is gripped and released by opening and closing the gripping claw 11 by advancing and retracting the sleeve.The stopper 10 for positioning the wire 5 is formed into a trapezoid with a wide lower side, and the gripping claw 11 is shaped like a needle. A contact body 38 is integrally attached to a swinging arm 37 pivotally connected to the head 12, and the swinging arm is provided with a contact body 38 that comes into contact with the end face of the sleeve 23, thereby opening and closing the gripping claw 11. .

-Example- The illustrated embodiment will be further described below.

FIG. 1 is a front view showing the overall structure of the winding machine, in which 1 is a frame, 2 is a coil forming head of this invention, 3 is a wire supply device, and 4 is a wire from a supply source (not shown) to the wire supply device 3. 5 is a guide drum with a tension device that guides the wire; 6 is a wire feeding device 3;
A pulse motor 7 raises and lowers the entire device, and a limit switch 7 detects the raised and lowered positions of the wire feeding device 3. The output shaft of the pulse motor 6 is
It is connected to the wire supply device 3 via a ball screw device 8.

The wire feeding device 3 sends out the tip of the wire 5 toward the needle 9 of the forming head, and the pulse motor 6 raises the wire feeding device 3 to bring the tip of the wire into contact with a stopper 10, which will be described later. In this state, a gripping claw 11 (described later) grips the tip of the wire, and the needle head 12 rotates to pull out the wire 5 while winding it around the needle 9 and forming it into a coil. 13 is a pulse motor that rotates the needle 9; 14 is a slit disk for detecting rotation angle;
5 is its sensor. When the forming is completed, a cutter 16 attached to the wire supply device 3 separates the coil from the wire, and the grip claws 11 open to drop the coil from the needle 9.

FIG. 2 is a sectional view of the forming head, and numeral 17 is a rotary spindle connected to the pulse motor 13 of FIG. Reference numeral 21 denotes a cylinder formed in the housing 20, and a sleeve 23 having a piston 22 fitted into the cylinder is provided, and an end plate 24 is screwed to the lower end of the sleeve. 25, 26, 27
is the seal ring, 28 is the dust seal, 29,3
0 is a cushion material that cushions the impact at the stroke end of the piston 22, 31 and 32 are ports for supplying fluid pressure to the cylinder 21, and 33 is an end plate 2.
This is a set screw that prevents No. 4 from loosening.

The needle 9 is fixed to a base body 34, and is mounted by fitting the base body 34 onto the rotating spindle 17 and fixing it with a set screw 35. Base body 34
A trapezoidal stopper 10 is fixed to the
A swinging arm 37 is pivotally attached by a pin 36, and the gripping claw 11 is integrally provided on the swinging arm 37. A roller 38 is pivotally attached to the other end of the swing arm 37, and a compression spring 39 for pressing the roller 38 against the end plate 24 is mounted between the swing arm 37 and the base body 34.

The stopper 10 in the illustrated embodiment is formed by bending a wire rod into a trapezoidal shape, but it may also be formed from a trapezoidal plate piece. In any case, when the wire feeding device is moved upward by the pulse motor 6, the tip of the wire 5 being sent out from the wire feeding device surely contacts this stopper 10 and is positioned at the tip of the gripping claw 11. The lower side of the stopper 10 is formed wide so that the stopper 10 is mounted parallel to the operating direction of the gripping claw 11.

Next, the operation of the illustrated device will be explained.

In the standby state, fluid pressure is supplied from the port 31 and the sleeve 23 moves downward;
The roller 38 is pressed down and the gripping claws 11 are opened. The tip of the wire 5 is sent out from the wire feeding device 3 to, for example, position A in FIG.
It is positioned by contacting the lower side of 0. In this state, fluid pressure is supplied to the port 32, the sleeve 23 moves upward, the pressing force of the roller 38 is released, and the spring 3
The gripping claw 11 and the needle 9 grip the tip of the wire 5 due to the biasing force of the wire 9 . Next, the pulse motor 13 is driven to rotate the rotary spindle 17, and the needle 9 and gripping claw 11 rotate to draw out the wire 5 and wind it around the needle 9. When the needle 9 rotates a predetermined amount to form a coil with the required number of turns, the amount of rotation is detected by a sensor 15 that counts the slits in the slit disk 14, and the pulse motor 13 stops rotating. Next, the cutter 16 of the wire supply device is activated to separate the formed coil from the wire 5, fluid pressure is supplied to the port 31, the sleeve 23 is moved downward and the gripping claw 11 is opened, and the formed coil is transferred to the needle 9. slip out and fall.

-Effects of the invention- A coil is formed by repeating the above steps, and the forming head of this invention operates the gripping claws provided on the needle head side by raising and lowering the sleeve provided on the housing side. As a result, the gripping claws can be opened and closed reliably.
In addition, by providing a trapezoidal stopper with a wide bottom edge, the wire can be reliably positioned at the tip of the gripping claw, so even thin wires, which can be caused by variations in the feeding device, can be reliably gripped, thereby preventing gripping errors. Since the gripping position of the wire is always constant, there is no variation in the winding pitch at the beginning of winding. Since the gripping claws and stopper are provided on the needle head side, the gripping claws and stopper can be provided on each needle head depending on the thickness of the needle.When changing the diameter of the coil, etc., the gripping claws and stopper can also be attached to the needle head. Since it is replaced together with the base body, it is easy to change the setup, and the quality control of the coil to be formed is also easy.

[Brief explanation of the drawing]

The figure shows one embodiment of this invention.
This figure is a front view showing the overall structure of the winding machine, and FIG. 2 is a side view of the forming head showing the housing side in cross section. In the figure, 2 is a coil forming head, 5 is a wire, and 9
is a needle, 10 is a stopper, 11 is a gripping claw, 1
2 is a needle head, 13 is a pulse motor, 14
15 is a slit disk, 15 is a sensor, 17 is a rotating spindle, 23 is a sleeve, 37 is a swinging arm, 3
8 is a roller.

Claims (1)

[Scope of utility model registration request] The housing side is equipped with a sleeve that moves forward and backward at a predetermined timing and a rotating spindle located at the axis of the sleeve, and a needle head fitted to the tip of the rotating spindle has a contact body that comes into contact with the end surface of the sleeve. a gripping claw fixed to a swinging arm having one end thereof, and a trapezoidal stopper for positioning the wire at the tip of the gripping claw;
Coil forming head of winding machine.