JP4038403B2 - Parts supply device to supply head - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a component supply device to a supply head that supplies components from a vibration type part feeder to a supply head on a welding machine side.
[0002]
[Prior art]
Conventionally, a component supply device 3 to a supply head as shown in FIG. 4 is known. The component supply device 3 supplies a component 2 such as a welding nut as shown in FIG. 3 to a supply head 14 on the welding machine 1 (see FIG. 1) side. The parts supply device 3 is disposed in the vibration part feeder 31, the metal pipe part 34 continuous from the tip part 33 a of the spiral part passage 33 (see FIG. 2) of the part feeder 31, and the pipe part 34. An air nozzle 35 capable of injecting air toward the distal end of the portion 34, a distal end portion 36 b is connected to the distal end portion 34 b of the pipe portion 34, and a distal end portion (not shown) is a metal of the supply head 14 on the welding machine 1 side. Based on a flexible delivery hose 36 connected to the chute 15, a component sensor 37 for detecting the presence or absence of the component 2 on the end 36 b side of the delivery hose 36, and a signal from the component sensor 37 And a control circuit 38 for controlling the special vibration generating device 32 of the parts feeder 31. The vibration is generated by the special vibration generating device 32 so as to rise to the tip 33a of the spiral component passage 33, and then When the component 2 is detected by the component sensor 37, the control circuit 38 stops the special vibration generating device 32 and the air from the air nozzle 35 when the component 2 that has been fed through the slope pipe portion 34 and slipped to the end portion 36b of the hose 36 is detected. And the component 2 is pumped to the supply head 14 side.
[0003]
[Problems to be solved by the invention]
However, according to the above prior art, since the component 2 that is sliding down is detected by the component sensor 37, the end portion 36b side of the sending hose 36 must hang downward as shown in FIG. There is. In general, it is desirable that the parts feeder 31 be installed at a low position in order to facilitate parts supply work to the hopper. For this reason, as described above, the total length of the delivery hose 36, that is, the total length of the pressure-feeding passage of the component 2 is increased by hanging the end portion 36b side of the delivery hose 36 downward, so that the component 2 is reliably supplied to the supply head 14 In order to pump to the side, it is necessary to eject a large amount of air from the air nozzle 35.
[0004]
The present invention solves the problems of the prior art as described above, and can shorten the overall length of the delivery hose, that is, the overall length of the pressure feeding passage of the component. The component is reliably moved to the supply head side by injection of a small amount of air. An object of the present invention is to provide a component supply device to a supply head that can be pumped.
[0005]
[Means for Solving the Problems]
A component supply device to a supply head according to the present invention is provided in a vibration type part feeder, a metal pipe part continuous from a tip part of a spiral part passage of the part feeder, and the pipe part. An air nozzle capable of injecting air in the distal direction, and a flexible delivery in which a distal end portion is connected to the distal end portion of the pipe portion and a distal end portion is connected to a metal chute of a supply head on the welding machine side A hose and a component sensor for detecting whether or not the number of components waiting in the supply head has become less than a predetermined number, and the delivery hose has an uphill at the end. The pipe portion is configured to be an uphill from the distal end portion to the tip end portion, and the gradient is determined by the vibration of the parts feeder when the parts feeder is operated. When the component sensor detects a component shortage state, the self-propelled force to the direction and the component's own weight are balanced, and a standby state in which a plurality of components do not move in front of the air nozzle can be created. The operation of the parts feeder is started, air is injected from the air nozzle after a lapse of a predetermined time after the operation starts, and a plurality of parts in a standby state in front of the air nozzle are pumped to the supply head side. And
[0006]
The component supply device to the supply head according to the present invention can form the pipe portion uphill by utilizing the balance between the self-propelled force upward of the component by the vibration of the parts feeder and the weight of the component. Since it is not necessary to bend the end side of the delivery hose connected to the part downward, the overall length of the delivery hose, that is, the overall length of the pumping passage of the parts can be shortened, and the injection of a small amount of air is ensured. Parts can be pumped to the supply head side.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0008]
FIG. 1 is a configuration diagram of an apparatus for supplying parts to a supply head according to an embodiment of the present invention, FIG. 2 is a schematic plan view of a vibratory parts feeder, and FIG. 3 is an example of parts supplied to the supply head. 1 shows a perspective view of a weld nut.
[0009]
In FIG. 1, the code | symbol 1 represents the welding machine. The welding machine 1 has an upper electrode portion 11 that can be moved up and down, and a lower electrode portion 12 that is in a fixed position. A workpiece (not shown) and a component such as a welding nut 2 are set on the lower electrode 11, and the upper electrode The welding machine welds the component 2 to the workpiece by lowering the portion 11 and pressing the workpiece and the component 2 against the lower electrode portion 12 while energizing between the upper and lower electrode portions 11 and 12.
[0010]
The welding machine 1 is provided with a component feeding device 13 that automatically feeds the component 2 to the lower electrode portion 12. The component feeding device 13 includes a supply head 14, and the supply head 14 locks the components 2 waiting in an orderly manner in a metal chute 15 by their own weight to a rod 16 that can be advanced and retracted by air one by one. To the lower electrode portion 12.
[0011]
Reference numeral 3 denotes a component supply device that supplies the component 2 to the supply head 14. The component supply device 3 includes a vibration type part feeder 31. The parts feeder 31 includes a special vibration generator 32, and raises the component 2 to the tip 33a of the spiral component passage 33 (see FIG. 2) by vibration generated by the special vibration generator 32. A metal pipe portion 34 is connected to the distal end portion 33 a of the spiral component passage 33. The pipe part 34 is configured to be an uphill from the end part 34a to the tip part 34b. An air nozzle 35 that can inject air toward the distal end of the tube portion 34 is disposed in the tube portion 34.
[0012]
A distal end portion 36a of a feeding hose 36 having flexibility made of resin or the like is connected to the distal end portion 34b of the tube portion 34. The distal end portion 36 a of the delivery hose 36 is connected to the chute 15 of the supply head 14. The end portion 36b of the delivery hose 36 forms an uphill.
[0013]
The slope of the pipe portion 34 is such that when the parts feeder 31 is operated, the self-propelled force upward of the parts 2 due to the vibration of the parts feeder 31 and the weight of the parts 2 are balanced, and a plurality of parts 2 move in front of the air nozzle 35. It is set to be able to create a standby state that does not.
[0014]
A component sensor 37 for detecting whether or not the number of components 2 that are in a standby state by the supply head 14 has become a predetermined number or less has been disposed at the distal end portion 36 a of the delivery hose 36. . The component sensor 37 is electrically connected to the control circuit 38. The control circuit 38 controls each operation of the special vibration generator 32 and the air nozzle 35 based on the signal from the component sensor 37.
[0015]
Next, main operations of the component supply apparatus 3 configured as described above will be described.
[0016]
On the welding machine 1 side, a predetermined number or more of the parts 2 stand in an orderly manner in the chute 15, and the parts 2 are locked to the rod 16 of the supply head 14 one by one and conveyed to the lower electrode part 12, During resistance welding, the special vibration generator 32 of the parts feeder 31 is in a stopped state.
[0017]
Thereafter, when the number of parts 2 in the standby state in the chute 15 decreases and becomes less than a predetermined number, a detection signal indicating a part shortage state is input from the part sensor 37 to the control circuit 38, and the control circuit 38 The special vibration generator 32 is activated. When the special vibration generating device 32 is activated, the leading part 2 goes up through the pipe part 34 through the tip part 33a of the spiral part passage 33 and stops at a height position where the self-running force and the weight of the part 2 are balanced. . This position is in front of the air nozzle 35, and at least two or more parts 2 are positioned in front of the air nozzle 35. When the plurality of components 2 are in balance with the front position of the air nozzle 35, the control circuit 38 operates the air nozzle 35 to inject air from the air nozzle 35 and simultaneously stop the special vibration generator 32. By this air injection, the plurality of parts 2 in front of the air nozzle 35 are sent out to the chute 15 through the delivery hose 36. By this component pressure feeding, the component sensor 37 does not output the component shortage state detection signal, and thereafter, every time the component sensor 37 detects the component shortage state, the above operation is repeated.
[0018]
As described above, the component supply device 3 to the supply head 14 according to the present embodiment includes the vibration-type parts feeder 31, the metal pipe portion 34 continuous from the distal end portion 33 a of the spiral component passage 33 of the parts feeder 31, and the like. The air nozzle 35 is disposed in the pipe portion 34 and can inject air toward the distal end of the pipe portion 34. The distal end portion 36b is connected to the distal end portion 34b of the pipe portion 34 and the distal end portion 36a is connected to the welding machine 1 side. Whether the supply hose 36 having flexibility connected to the metal chute 15 of the supply head 14 and the parts 2 waiting in the supply head 14 are in a shortage state where the number is less than a predetermined number. The delivery hose 36 is configured to form an uphill at the end portion 36b, and the pipe portion 34 extends from the end portion 34a to the tip portion 34b. The slope is configured so that when the parts feeder 31 is operated, the self-propelling force upward of the part 2 due to the vibration of the parts feeder 31 and the weight of the part 2 are balanced. It is set so as to be able to create a standby state in which a plurality of parts do not move forward, and when the parts sensor 37 detects a parts shortage state, the parts feeder 31 starts operating, and after a predetermined time elapses after starting operation, Air is ejected from the nozzle 35 and a plurality of components 2 that are in a standby state in front of the air nozzle 35 are pumped to the supply head 14 side.
[0019]
According to the present embodiment, the pipe part 34 can be formed uphill by utilizing the balance between the self-propelled force of the part 2 upward due to the vibration of the parts feeder 31 and the weight of the part 2. Since it is not necessary to bend the end 36b side of the delivery hose 36 connected to the bottom, the overall length of the delivery hose 36, that is, the total length of the pressure feed passage of the component 2, can be shortened, and a small amount of air can be injected. Thus, the component 2 can be reliably pumped to the supply head 14 side.
[0020]
【The invention's effect】
According to the present invention, it is possible to shorten the entire length of the delivery hose, that is, the total length of the pressure feeding passage of the component, and it is possible to reliably pressure-feed the component to the supply head side by injection of a small amount of air.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a component supply device to a supply head according to an embodiment of the present invention.
FIG. 2 is a schematic plan view of a main part of the component supply apparatus.
FIG. 3 is a perspective view of a welding nut which is an example of a component to be supplied.
FIG. 4 is a schematic configuration diagram of a main part of a component supply device to a supply head according to a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Welding machine 2 Parts 3 Parts supply apparatus 14 Feed head 15 Metal chute 31 Vibrating parts feeder 33 Spiral part passage 33a Tip part 34 Metal pipe part 34a End part 34b Tip part 35 Air nozzle 36 Delivery hose 36a Tip part 36b Terminal part 37 Parts sensor

Claims (1)

Vibrating parts feeder,
A metal pipe continuous from the tip of the spiral part passage of the parts feeder;
An air nozzle disposed in the pipe portion and capable of injecting air toward the distal end of the pipe portion;
A flexible feed hose, the distal end of which is connected to the distal end of the pipe and the distal end is connected to the metal chute of the supply head on the welding machine side;
A component sensor for detecting whether or not the number of components that are in a standby state in the supply head has reached a predetermined number or less,
The delivery hose is configured to form an uphill at the end;
The pipe portion is configured to be an uphill from the distal end portion to the tip end portion, and the gradient is such that when the parts feeder is operated, the self-propelled force of the parts due to vibration of the parts feeder and the weight of the parts are The balance is set so as to create a standby state where a plurality of parts do not move in front of the air nozzle,
When the component sensor detects a component shortage state, the component feeder starts operating, and a plurality of components that are in a standby state in front of the air nozzle after jetting air from a predetermined time after the operation starts The component supply device to the supply head, wherein the component is pumped to the supply head side.

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