JPS5917967B2 - Wire cutting device for automatic winding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wire cutting device for an automatic winding machine, and in particular, it is applied to a continuous automatic winding machine with a multi-terminal core, and is capable of cutting wire rods entwined with the terminals of the core near the terminals. This invention relates to a wire cutting device for cutting.

Generally, manually tying terminals and winding a coil around a multi-terminal core requires a great deal of effort, and the winding accuracy is often unsatisfactory.

As an automated version of this, a terminal core is held in a rotatable '0 chuck, and a wire feeding nozzle is rotated around one terminal of the core to tie the terminal.
An automatic winding machine has been developed that winds a coil by rotating the chuck. To cut the wire after it has been wrapped around the terminal, the wire is stretched out from the terminal in a taut state and cut near the terminal by crossing the cutting pin or cutting lever. In such an automatic winding machine, a plurality of core chucks are attached to the outer periphery of a circular indexing table, and the table is intermittently rotated to send the multi-terminal cores one by one to the position of the wire delivery nozzle. This makes it possible to automatically and continuously wind a plurality of multi-terminal cores, making it possible to mass-produce this type of coil. In this case, after finishing the winding operation of one core and cutting the end of winding wire '5, in order to automatically continue winding the next new core, cut the tip of the cut wire. The wire must be kept in a stretched state from the wire delivery nozzle.

Therefore, when cutting the end of the wire wrapped around the first terminal,
The cutting pin or lever may be moved transversely at a position near the wire delivery nozzle, but when cutting the end of the wire wrapped around the last terminal, the wound core is
With the wire attached to the last terminal, transport the wire to a certain distance from the wire delivery nozzle, stretch the wire from the nozzle, and hold the wire with an appropriate winding holding device. , it is necessary to operate the cutting lever at a position remote from the nozzle. In this case, it goes without saying that the operation of the cutting lever and the operation of the winding holding device must be performed at constant timing. An object of the present invention is to provide a wire cutting device for a continuous automatic wire winding machine that can meet the above-mentioned requirements.

The above-mentioned objects of the present invention include: a rack gear slidably held; a pinion pivotally supported for rotation in engagement with the rack gear; a disconnection lever fixed to the pinion shaft; an actuating device for pushing against an attached return spring, the actuating device including a cam device coupled to a rotary motor, the cutting lever being tensioned from the terminal of the core by rotation of the pinion shaft; This is achieved by a wire cutting device characterized in that it cuts across a stretched wire.

A winding holding device for holding the wire connected to the terminal of the core in a tensioned state is preferably connected to the output shaft of the rotary motor.

This allows interlocking with the cam device attached to the output shaft of the same rotary motor, making it easy to time the operation of the cutting lever and the wire gripping operation of the winding holding device. One example of the winding holding device includes a drive rod that pivotally supports a pair of gears that mesh with each other, a winding holding lever that is fixed to one of the gears, and a link mechanism that is connected to the other of the gears. , a reciprocating slider crank mechanism connecting the link mechanism and the rotary motor;
The winding holding lever extends and expands outward near the top dead center of the reciprocating slider crank mechanism, and closes near the bottom dead center so as to embrace the wire rod connected from the terminal of the core to the wire feeding nozzle. A holding device configured as follows is conceivable.

EMBODIMENT OF THE INVENTION Hereinafter, an embodiment in which the present invention is applied to a continuous automatic winding machine will be described with reference to the drawings.

FIG. 1 is a schematic top view of a continuous automatic winding machine to which the present invention can be applied. To briefly explain this continuous automatic winding machine, a circular indexing table 12 with a plurality of core chucks 13 attached thereto is provided on the top of a base 11 so as to rotate intermittently, and on the outside of this table 12, Core supply device 14
, a core holding and correcting device 15, first, second and third tying devices 16, 17, 18, and a core extracting device 19 are arranged. Then, on this base, the first and second karage devices 1
Winding holding devices 20, 21, and 22 are arranged between the windings 6 and 17, between the second and third tying devices 17 and 18, and between the third tying device 18 and the take-out device 19, respectively. ing. The multi-terminal core 23 is held by the chuck 13 at the position of the core feeding device 14, and when it comes to the position of the first tying device 16 as the indexing table 12 rotates, the wire rod of the first tying device 16 is fed out. The wire rod fed out from the nozzle 24 is twisted around the terminal of the core 23 and is wound into a coil. At the start of the tying operation, the wire sent out from the nozzle 24 is manually stretched and held at an appropriate location, and when the coil formation (tying and coil winding) is completed, the wire at the beginning of tying is A cutting pin (indicated by reference numeral 106 in FIG. 3) provided on the first tying device 16 makes the cut near the terminal that is first cinched. In this state, the wire at the end of the wire (
This core is conveyed to the next position of the tying device 17 by the rotation of the table 12, with the wire connected to the wire feeding nozzle 24 of the first tying device 16 attached to the terminal. At this time, the first and second karage devices 1
A wire cutting device 107 according to an embodiment of the present invention, which is provided in the second winding device 17, holds the wire 25 at the end of the winding by the winding holding device 20 disposed between the windings 6 and 17.
The wire rod 25 is cut near its terminal by the cutting lever 110 of. Since the wire rod 25 is held under tension between the twisted terminal and the winding holding device 20, the wire rod 25 is easily cut by the cutting lever 110 crossing the wire rod 25. The wire rod 25 after cutting is transferred to the winding holding device 2
The first tying device 1 is held at 0 and then extended from there.
It is connected to the wire rod delivery nozzle 24 of No. 6. Therefore, when tying and coil winding the next new core using the first tying device 16, the tip of the wire fed out from the nozzle 24 is There is no need to manually pull the core, and the new core can be immediately started. Another wire is fed out from the wire feeding nozzle 26 of the second tying device 17,
Another coil is wound over the core on which the coil has been formed by the first tying device 16. In this case, the operation of the winding holding devices 21 and 22 is the same as the operation of the winding holding device 20 described above. As can be seen from the above description, the first tying device 16 cuts only the wire of the first tangled terminal with a round pin, and the second tying device 17 does not cut the wire of the last tangled terminal. It is transported to the position and cut here, so
The first tying device 16 does not need to be provided with the wire cutting device 107 described above.

FIG. 2 is a partially cutaway side view showing the above-described winding holding device in detail.

FIG. 2 is an enlarged sectional view taken approximately along the - line of FIG. 1.
A bracket 116 is attached to the base 11 of the winding machine described above, and a sliding rod 126 is attached to the bracket 116. A pair of spur gears 12 are provided at the tip of the sliding rod 126.
7,128 are pivotally supported. A winding holding lever 130 is fixed to the shaft 129 of one spur gear 127, and between this holding lever 130 and the wire receiving pin 131 elastically held by the bracket 116, there is a The wire rod 25 at the end of curling is sandwiched between the wire rods 25 and temporarily fixed in an expanded state. The wire receiving pin 131 connects the brackets 116 and 3 by applying a pressing force from its tip.
The bracket 116 is supported so as to slightly enter the bracket 116 against a compression spring 132 installed between the brackets 116 and 116. The shaft 133 of the other spur gear 128 is connected to the swing link 136 of the reciprocating slider crank mechanism 151 via links 134 and 135.
5 is connected to the tip 136a. In addition, link 134
is fixed to the shaft 133. A rear end 136b of the swing link 136 is pivotally connected to a swing lever 138 fixed to an output shaft 137 of a rotary motor 150. In the illustrated embodiment, a joint 139 is provided between the tip 136a4 of the swing link 136 and the link 135. 140 is a long groove formed in the joint 139, and 141 is a roll pin fixed to the swing linter 136, which is inserted into the long groove. As shown in FIG. 1, the leading end of the swing link 136 is positioned toward the indexing table 12, and the rear end 136b is positioned toward a portion near the outside of the automatic winding machine. A turning lever 138 fixed to an output shaft 137 of a rotary motor 150 is rotated by the motor 150 from the position shown in FIG. position, that is, when approaching the index table 12 side (the position indicated by the imaginary line in FIG. 2), the swing link 136 as a whole moves toward the index table 1
2, and extends the sliding rod 126, which is linked to the tip of the swing link 136 via the links 135, 134 and the shaft 133, toward the index table side.

At the same time, the spur gears 128, 127 are rotated in the direction of arrow A of the link 134 fixed to the shaft 133 of the spur gear 128.
rotates, and the holding lever 130 fixed to the shaft 129 of the spur gear 127 is moved in the direction of arrow B, \, that is, the indexing table 1
Turn it so that it opens its mouth toward 2. As the rotation of the swing lever 138 further progresses and continues to rotate in one direction from the position shown by the imaginary line in FIG. 2 to the original position shown by the solid line, the swing link 136 as a whole moves back, and the sliding rod 126 moves back as well. The holding lever 130 has a link 134 and a spur gear 128.
, 127, the receiving pin 131 is turned in the direction \, that is, so as to close its mouth, thereby sandwiching the wire 25 between the holding lever 130 and the receiving pin 131. Note that the reference numeral 142 indicates a pin attached to the sliding rod 126.
43 is a stopper provided on the bracket 116,
The pin 142 is locked when the sliding rod 126 retreats. The wire cutting station 107 according to the present invention is provided above the nozzle holder 73 of the second tying device 17 and the third tying device 18.

Next, this cutting device 107 will be explained. As shown in FIGS. 3 and 4, a pinion shaft 109 is vertically supported by a small block 108 attached to the upper surface of the nozzle holder 73, and a pinion 111 is fixed to the small shaft 109.

Further, a cutting lever 110 is attached to the upper end of the shaft 109. The small block 108 has a vertical pinion shaft 10.
A sliding member 112 extending laterally to the small block 9 is inserted into and out of the small block. The sliding member 112 and a certain part of the small block, for example the cover plate 113 of the small block 108.
A tension spring (return spring) 114 is installed between the sliding member 112 and the sliding member 112 so that the tip 112a of the sliding member 112 projects laterally from the small block 108. Furthermore, a rack gear 115 that meshes with the pinion 111 is formed on the sliding member 112. Tip 11 of sliding member 112
2a resists the force of the tension spring 114 and pulls the small block 1.
08 in the direction of arrow C in FIG. 3, the rack gear 115 is moved and the pinion 111 is rotated, thereby rotating the laterally extending cutting lever 110 about its vertical axis. When the cutting lever 110 crosses the finished wire to the last terminal according to the winding pattern of the core, the cutting lever 110 and the terminal cooperate to cut the wire near the terminal. do. The cutting lever 110 may be rotated by at most half a turn, after which the pressure on the tip 112a of the sliding member 112 is released and the cutting lever 110 is reversely rotated and returned to its original position by the action of the tension spring 114. Next, with reference to FIG. 5, the above-described pressing mechanism of the sliding member 112 during wire cutting and the rapid return mechanism based on the repulsive force of the tension spring 114 will be described.

It should be noted that FIG. 5 also shows a portion of the winding holding device described above. Although FIG. 5 is a top view of the automatic winding machine, the aforementioned small block into which the sliding member 112 is inserted or the pinion that meshes with the rack gear 115 are omitted for clarity. A bracket 116 is attached to the base 11 of the winding machine, and an L-shaped sliding member drive lever 117 is pivotally attached to this bracket by a pivot shaft 149. By swinging the drive lever 117 about the pivot 149, the tip 117a of the drive lever pushes the tip 112a of the sliding member 112. The other end 117b of the drive lever 117 is connected to a link 118, and the link 118 is further connected to one end 119a of a cam lever 119. Cam lever 119
is pivotally connected to the bracket 116 by a pivot 120;
The other end 119b is connected to the bracket opening 16 by a tension spring 121. A cam roller 123 (FIG. 2) that contacts the wire cutting cam 122 is attached to the cam lever 119. The rotation of the cam 122 causes the drive lever 117 to pivot via the cam roller 123, cam lever 119, and link 118, thereby causing the sliding member 112 to rotate.
moves into the small block (not shown in FIG. 5), and rotates the cutting lever 110 (not shown in FIG. 5) as described in FIGS. 3 and 4. The wire cutting cam 122 is rotated by a rotary motor 150 attached to the bracket 116 (see FIG. 2). Note that the rack gear 11
5, a link 118 (drive link) connected to the drive lever 117, and a wire cutting cam 1 connected to the rotary motor 150.
22, and a cam lever 119 whose one end is connected to the link 118 and whose other end is held in pressure contact with the wire cutting cam 122 via a cam roller 123. Configure. Note that the rotary motor 150 is equipped with a suitable clutch brake device (
(not shown) should be connected. Further, the terminal of the core is preferably shaped like a square pin with a square cross section to facilitate cutting of the wire. As described above, in the present invention, the same rotary motor is used as the drive source to perform the stretching and holding operation and the cutting operation of the wire, and the cam device is used to interlock these operations so that they are performed at a constant timing.

Therefore, it is possible to automatically cut the wire that has finished winding near the terminal, and then immediately move on to winding the next core, making it possible to use multiple tying devices, wire cutting devices, and wire holding devices. The present invention is extremely useful when applied to a continuous automatic winding machine for a core with multiple terminals.

[Brief explanation of drawings]

Figure 1 is a schematic top view of a continuous automatic winding machine to which the present invention is applied, Figure 2 is a partially cutaway side view of a winding holding device, and Figure 3 is a schematic top view of a continuous automatic winding machine to which the present invention is applied.
The figure is a front view of the wire rod cutting device according to the embodiment of the present invention attached to the upper part of the karage device, FIG. 4 is a cross-sectional view taken along the - line of FIG. 3, and FIG. FIG. 3 is a plan view of the actuating device of the cutting device; 20... Winding holding device, 24... Wire feeding nozzle,
107... Wire cutting device, 109... Pinion shaft,
110... Cutting lever, 111... Pinion, 11
5... Rack gear, 114... Return spring, 122...
... Cutting cam, 119... Cam lever 126...
Sliding rod, 127, 128... Gear, 130... Winding holding lever 134, 135... Link, 136...
Swing link, 150... Rotating motor, 151... Reciprocating slider tarunk mechanism.

Claims (1)

[Claims] 1. A rack gear that is slidably held on a winding machine base, a pinion that is pivotally supported to mesh with and rotate with the rack gear, a cutting lever that is fixed to the pinion shaft, and a mechanism that pushes the rack gear. and a winding holding device for holding the wire rod connected to the terminal of the core in a tensioned state. a drive link connected to a shaped drive lever; a wire cutting cam connected to a rotary motor; one end connected to the drive link and the other end held in pressure contact with the wire cutting cam via a cam roller; a cam lever, and the winding holding device has a sliding rod supported by a bracket on the winding machine base so as to be slidable toward the center of the winding machine and relative to the bracket, and the sliding rod. a pair of gears that are pivotally supported at the tips facing the center of the winding machine and mesh with each other; a winding holding lever having one end fixed to the shaft of a gear on the driven side of the pair of gears; a link mechanism connected to the shaft of the gear on the driving side;
A crank mechanism connects the link mechanism and the rotation motor of the actuating device, and each of the pair of gears of the winding holding device has a shaft portion fixed to the center of each gear, and a shaft portion fixed to the center of each of the gears is connected to the tip of the sliding rod. The wire rod cutting cam and the crank mechanism are rotatably supported, and the wire rod cutting cam and the crank mechanism are configured to cross the wire extending from the terminal of the core with the cutting lever while the wire rod is being held by the winding holding device. A wire cutting device for an automatic wire winding machine, characterized in that the device is configured to: