JP3878081B2 - Parts supply device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a component supply apparatus that supplies components such as nuts to a welding place.
[0002]
[Prior art]
Parts supply devices that automatically supply parts (nuts, washers, bolts, etc.) onto a work (metal plate, etc.) set on the lower electrode of a resistance welder are disclosed in Japanese Patent Publication No. 47-41655 and Japanese Utility Model Publication No. 53-26422. Although it is well known as described in the Gazette, etc., the working range of the resistance welding machine and the working range of the parts supply device are usually secured as a work area, and this work area must be entered during the operation of the welding machine. Is forbidden. And when it penetrate | invades into this work area, the structure which a resistance welding machine stops automatically is taken.
[0003]
[Problems to be solved by the invention]
However, in all factories, the work area is not secured, and there are currently devices that do not have an automatic stop mechanism, mainly from the viewpoint of cost reduction of the automatic stop mechanism.
[0004]
In the case of such a device, when an operator or the like enters the work area, the rod may come into contact with the body or the like on the operation line of the component supply rod of the component supply device, and the impact force of the rod may be applied to the body, resulting in injury. .
[0005]
The present invention protects the body from injury when an operator or the like enters the work area and the parts supply rod comes into contact with the body with a simple and inexpensive configuration in an apparatus that does not include such an automatic stop mechanism. An object of the present invention is to provide an apparatus capable of performing the above.
[0006]
[Means for Solving the Problems]
A component supply device according to claim 1 is a component supply device for supplying a part such as a nut to a welding place, a center rod and a cylinder rod that are concentrically arranged and can be separated from each other in the front-rear direction, and an end of the cylinder rod A guide for the center rod fixed to the center rod, and a pressure relief passage formed between an outer peripheral surface of the center rod and an inner peripheral surface of the cylinder rod, and the center rod and the cylinder rod have a fluid pressure Normally, it moves forward and backward as a unit, engages the part with the tip of the center rod when it moves forward, and supplies it to the welding location, and the tip of the center rod collides with an obstacle when moving forward When the center rod and the cylinder rod are separated from each other, the pressure relief passage is opened, and the center rod is Wherein the forward drive hydraulic pressure of de and the cylinder rod is reduced through the pressure relief passageway.
[0007]
According to the component supply device according to claim 1, when the body of an operator or the like comes into contact with the center rod when the center rod moves forward, the forward drive fluid pressure is reduced, so that the impact force applied to the body from the center rod is sufficient. It becomes possible to protect workers from injury.
[0008]
According to a second aspect of the present invention, the component supply apparatus includes a pressure switch that detects a decrease in the forward drive fluid pressure, and stops application of the forward drive fluid pressure when the pressure switch detects the decrease in pressure. For this reason, the forward drive fluid pressure can be reduced more rapidly.
[0009]
The component supply device according to claim 3 includes a pressure chamber that applies a backward drive fluid pressure to the cylinder rod when the cylinder rod moves backward, and the cylinder rod moves forward when the cylinder rod moves forward by the forward drive fluid pressure. A flow sensor for detecting the flow rate of the pressure fluid discharged from the pressure chamber by the advance of the rod, and the forward drive fluid when the flow rate sensor detects that the flow rate of the pressure fluid has fallen below a predetermined range; Stop applying pressure. For this reason, even if the pressure switch malfunctions due to fluctuations (decrease) in the supply pressure itself of the fluid pressure circuit, a decrease in supply pressure can be detected based on the signal from the flow sensor. By notifying the operator, the operator can quickly take appropriate measures thereafter (inspection of the fluid pressure circuit, etc.).
[0010]
A component supply device according to a fourth aspect includes a forward end sensor that detects a forward end of the cylinder rod, and a backward end sensor that detects a backward end of the cylinder rod, wherein the pressure switch and the flow rate sensor include the Operation is possible only during a period from when the backward end sensor is turned off to when the forward end sensor is turned on. For this reason, it becomes possible to clearly recognize the contact with the worker or the like when the cylinder rod moves forward and the supply abnormality of the fluid circuit.
[0011]
According to the component supply device of the fifth aspect, when the forward movement is performed, by exciting the cylinder rod and the guide, the component is magnetically attracted to the end face of the guide, and the component can be reliably supplied.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0013]
1 is a cross-sectional view of the component supply apparatus according to the first embodiment, FIG. 2 is an enlarged view of a II section shown in FIG. 1, FIG. 3 is an enlarged view of a III section shown in FIG. 1, and FIG. Fig. 5 is a cross-sectional view of VV shown in Fig. 1, Fig. 6 is a view taken along the arrow VI in Fig. 1, Fig. 7 is a basic configuration diagram of a fluid pressure (pneumatic) circuit, and Fig. 8 is an abnormality occurrence. The principal part sectional drawing at the time is shown, respectively. 9 is a cross-sectional view of a component supply apparatus according to the second embodiment, FIG. 10 is a basic configuration diagram of a fluid pressure (pneumatic) circuit, and FIG. 11 is a switch characteristic diagram of a flow rate sensor.
[0014]
[A] First Embodiment In FIGS. 1 to 8, a component supply apparatus 100 is attached to a resistance welding machine 200. A resistance welding machine 200 shown in FIG. 1 includes a lower electrode 201 and an upper electrode 202 that can be moved up and down. The resistance welding machine 200 has been supplied to the upper surface of a workpiece 300 such as a metal plate set on the lower electrode 201 by a component supply device 100. The component 400 such as a nut is positioned and set by the positioning pin 203, the upper electrode 202 is lowered, the workpiece 300 and the component 400 are pressurized and energized, and the component 400 is welded to the workpiece 300. In addition, it is possible to perform a method in which the upper electrode 202 is on the fixed side and the lower electrode 201 is the movable side, with the configuration upside down from that shown in FIG. In this case, the positional relationship between the workpiece 300 and the part 400 is also reversed.
[0015]
In the component supply device 100, the components 400 supplied in a line by a component conveying device such as a nut feeder (not shown) are supplied to the positioning pins 203 as welding locations one by one in synchronization with the welding to each workpiece 300. To supply.
[0016]
Conceptually, the component supply device 100 conceptually includes a component pool unit 100A that waits for the component 400 supplied from the component conveying device, and a component pool unit that can reciprocate in the front-rear direction (direction toward the welding place 203) and move forward. A rod part 100B that engages the tip part with the part 400 waiting for 100A and supplies it to the welding place 203, and accommodates the rod part 100B so as to be movable in the front-rear direction, and gives a driving force to the rod part 100B. A housing part 100C forming a pressure chamber to which fluid pressure (pneumatic pressure) is applied, and excitation for magnetically adsorbing the component 400 to the tip part of the rod part 100B disposed in the housing part 100C when the rod part 100B moves forward. Exciting part 100D that performs the fluid pressure circuit (pneumatic circuit) 1 that applies fluid pressure (pneumatic pressure) to the pressure chamber of the housing part 100C Composed of the 0E.
[0017]
The component pool section 100A includes a chute 3 connected to the component supply hose 2 by a hose joint 1, and the chute 3 vertically aligns the components 400 flowing down from the component conveying device by its own weight. Align. The lower end of the chute 3 is blocked by the base plate 4, and the leading part 400 comes into contact with the base plate 4 and enters a standby state. The standby part 400 waits in a state where the direction of the through hole 400a coincides with the movement direction of the rod part 100B. Further, rod insertion holes 3a and 3b that allow passage of the distal end portion of the rod portion 100B engaged with the component 400 are formed at portions of the chute 3 that are positioned in front of and behind the component through-hole 400a. As shown in FIGS. 2 and 6, a hinge plate 5 is disposed in front of the rod insertion hole 3a on the front side so as to be rotatable forward. The hinge plate 5 is fixed to a pin 7 fixed to the bracket 6, and the bracket 6 is fixed to the front surface of the housing portion 100C. A spring 8 is attached to the pin 7, and one end of the spring 8 is located on the front surface of the hinge plate 5 and the other end is located on the front surface of the chute 3. The hinge plate 5 normally keeps the rod insertion hole 3a closed by the urging force of the spring 8 as shown by a solid line in FIG. 2, and when the rod portion 100B moves forward, the rod portion 100B engaged with the component 400 is retained. When a pressing force is received from the distal end of the rod, it rotates forward as shown by a two-dot chain line in FIG. 2 to open the rod insertion hole 3a.
[0018]
The rod portion 100B has a center rod 9 made of a non-magnetic material as a center, and the center rod 9 has a tip portion 9a that can be inserted into the through hole 400a of the component 400 that is in a standby state when moving forward. A rod plate 10 having a diameter larger than the outer diameter of the center rod 9 is fixed to the rear end of the center rod 9. A cylinder rod 11 made of a cylindrical magnetic material having an inner diameter larger than the outer diameter of the center rod 9 is disposed on the outer periphery of the center rod 9. A guide 12 made of a cylindrical magnetic material that guides the reciprocating movement in the front-rear direction while keeping the axis of the center rod 9 is fixed to the tip of the cylinder rod 11. An annular piston 13 is fixed to the outer periphery of the rear end portion of the cylinder rod 11. On the rear end surface of the piston 13, a recess 13 a that accommodates the rod plate 10 is formed. Since the inner diameter of the cylinder rod 11 is larger than the outer diameter of the center rod 9 as described above, a space 14 is formed between the outer peripheral surface of the center rod 9 and the inner peripheral surface of the cylinder rod 11 as shown in FIG. Is done. This space 14 constitutes a pressure relief passage as will be described later. As shown in FIG. 5, a through hole 11 a communicating with the pressure relief passage 14 is formed at an appropriate position on the tip side of the cylinder rod 11.
[0019]
The housing part 100 </ b> C includes a cylinder 16 made of a non-metallic material or a non-magnetic material that houses the piston 13 slidably in the front-rear direction and forms a pressure chamber (pneumatic chamber) 15. As shown in FIG. 4, a stopper surface 17 that restricts the backward movement of the rod portion 100 </ b> B is formed at the rear end portion of the cylinder 16. In addition, a small pressure chamber (pneumatic chamber) 18 that is closed by the rear surface 10a of the rod plate 10 is formed at the rear end of the cylinder. Further, a first input / output port 19 that communicates between the small pressure chamber 18 and the pipe of the fluid pressure (pneumatic pressure) circuit 100E is formed at the rear end of the cylinder. As shown in FIG. 3, a second input / output port 20 that communicates between the pressure chamber 15 and the piping of the fluid pressure circuit 100 </ b> E is formed in the front end portion of the cylinder 16. A connecting fitting 21 for positioning the cylinder 16 is fixed to the front end portion of the cylinder 16, and the cylindrical rear portion of the guide 30 is screwed to the connecting fitting 21. As shown in FIG. 2, the front portion of the guide 30 is fixed to the cylindrical rear portion of the core 22. An excitation part 100 </ b> D is accommodated in a space 23 formed by a bottom surface and a peripheral surface forming a concave portion of the cylindrical rear portion of the core 22 and a front end surface of the guide 30.
[0020]
The excitation unit 100D includes a coil 24 that receives a current supply from the outside, and excites the cylinder rod 11 and the guide 12 when the coil 24 is energized.
[0021]
As schematically shown in FIG. 7, the fluid pressure circuit 100E includes a pressure source 25, a master valve 26 connected to the pressure source 25, an input side to the master valve 26, and an output side to first and second input / outputs. The drive valve 27 is connected to the ports 19 and 20, respectively, and a pressure switch 28 that detects a pressure abnormality on the first input / output port 19 side and shuts off the circuit power supply when the abnormality is detected.
[0022]
Next, an operation method of the component supply apparatus 100 and the resistance welding machine 200 configured as described above will be described.
[0023]
(1) Normal
i) Turn on the circuit power. When the circuit power is turned on, the master valve 26 is turned on, and the pressure fluid is supplied to the drive valve 27 side. At this time, the drive valve 27 is in an off state, the pressure fluid is supplied into the pressure chamber 15 via the second input / output port 20, and the piston 13 is retracted to the retracted position. When the piston 13 is in the retracted position, the rod plate 10 is accommodated in the recess 13 a and the rod plate 10 in the space 14 formed between the outer peripheral surface of the center rod 9 and the inner peripheral surface of the cylinder rod 11. The side opening end is held closed by the front surface 10 b of the rod plate 10.
[0024]
ii) The workpiece 300 is set on the positioning pin 203 of the lower electrode 201 of the resistance welder 200.
[0025]
iii) Start up the resistance welder 200. When the resistance welder 200 is driven, the drive valve 27 is turned on, pressure fluid is supplied into the small pressure chamber 18 via the first input / output port 19, and the rear surface 10a of the rod plate 10 receives fluid pressure, The center rod 9 and the cylinder rod 11 move forward integrally, and the tip end portion 9a of the center rod 9 enters the through hole 400a of the component 400 waiting in the component pool portion 100A. During this advancement, the coil 24 is energized to excite the cylinder rod 11 and the guide 12. By this excitation, the component 400 is magnetically held by the end face of the guide 12. During this advancement, the part 400 engaged with the center rod tip 9a pushes the hinge plate 5, and the hinge plate 5 rotates forward with the pin 7 as a fulcrum against the urging force of the spring 8. The insertion hole 3a is opened.
[0026]
iv) When the center rod 9 and the cylinder rod 11 advance, the tip end of the center rod tip 9a advances to a position directly above the positioning pin 203, and the piston 13 comes into contact with the front end surface of the pressure chamber 15 to stop the advance. To do. At the time of this forward stop, the forward end sensor 29 provided in advance in the cylinder 16 detects the piston 13, and the energization to the coil 24 is stopped by this detection signal (ON signal), and the cylinder rod 11 and the guide 12 are The excitation is released and the magnetic attractive force on the component 400 disappears. Due to the disappearance of the magnetic attraction force, the part 400 engaged with the center rod tip 9 a jumps forward due to gravity and inertia, fits on the positioning pin 203, and rides on the workpiece 300.
[0027]
v) When the predetermined time has elapsed after the operation of the sensor 29, the drive valve 27 is switched off. When the drive valve 27 is turned off, the pressure fluid is supplied into the pressure chamber 15 through the second input / output port 20, the front surface of the piston 13 receives the fluid pressure, and the cylinder rod 11 and the center rod 9 are integrated. And retreat. At the same time, the resistance welding machine 200 is operated, the upper electrode 202 is lowered, and the workpiece 300 and the component 400 are pressurized and energized with the lower electrode 201 to weld the two 300 and 400 together.
[0028]
vi) After completion of welding, the upper electrode 202 is raised and the workpiece 300 is unloaded.
[0029]
(2) When an abnormality occurs When the center rod tip 9a is moving forward with the part 400 magnetically attracted to the end face of the guide 12, some obstacle enters in front of the center rod tip 9a, and the center rod tip 9a becomes an obstacle. When the contact is made, a force in the backward direction acts on the center rod 9, and the center rod 9 is separated from the cylinder rod 11 as shown in FIG. That is, the rod plate 10 comes out of the piston recess 13a, and the opening end of the pressure relief passage 14 on the rod plate 10 side is opened. For this reason, the pressure fluid in the pressure chamber 15A on the small pressure chamber 18 side is discharged to the atmosphere from the cylinder rod through hole 11a via the pressure relief passage 14, and the forward drive fluid pressure to the center rod 9 is reduced. . Further, the pressure switch 28 is turned on by reducing the fluid pressure in the pressure chamber 15A. When the pressure switch 28 is turned on, the circuit power supply is turned off, and the master valve 26 and the drive valve 27 are turned off. Thereby, the center rod 9 and the cylinder rod 11 are in a free state, that is, a safe state.
[0030]
As described above, the component supply device 100 according to the first embodiment is concentrically arranged and can be separated from each other in the front-rear direction in the component supply device that supplies a component 400 such as a nut to a welding place (positioning pin 203). Center rod 9 and cylinder rod 11, guide 12 for center rod 9 fixed to the end of cylinder rod 11, and pressure relief formed between the outer peripheral surface of center rod 9 and the inner peripheral surface of cylinder rod 11 The center rod 9 and the cylinder rod 11 are subjected to fluid pressure and are usually advanced and retracted together as a unit, and the part 400 is engaged with the tip portion 9a of the center rod 9 during the advancement so that the welding place When the forward end portion 9a of the center rod 9 collides with an obstacle during advance, the center rod 9 and the cylinder rod 11 Pressure relief passage 14 is opened by separating from each other, the forward drive hydraulic pressure of the center rod 9 and the cylinder rod 11 is reduced via the pressure release passage 14.
[0031]
According to the first embodiment, when the body of an operator or the like comes into contact with the center rod 9 when the center rod 9 moves forward, the forward drive fluid pressure is reduced, so that the impact force applied to the body or the like from the center rod 9 is sufficiently weak. Thus, it becomes possible to protect workers from injury.
[0032]
In addition, a pressure switch 28 for detecting the decrease in the forward drive fluid pressure is provided, and when the pressure switch 28 detects the above decrease in pressure, the forward drive fluid pressure is reduced more rapidly by stopping the application of the forward drive fluid pressure. Will be able to do.
[0033]
Further, when the cylinder rod 11 and the guide 12 are excited during advance, the component 400 is magnetically attracted to the end face of the guide 12, so that the component 400 can be reliably supplied to the welding location.
[0034]
[B] Second Embodiment In FIG. 9, the component supply device 100 according to the second embodiment detects the backward end of the cylinder rod 11 in the component supply device 100 according to the first embodiment shown in FIG. 1. The rear end sensor 31 is provided. As will be described later, the backward end sensor 31 is configured so that the period during which the flow rate sensor 32 and the pressure switch 28 can be operated is limited only to the forward movement of the cylinder rod 11, that is, during the movement from the backward end to the forward end. 11 backward ends are detected.
[0035]
In FIG. 10, the fluid pressure (pneumatic) circuit of the component supply device 100 according to the second embodiment is the same as the fluid pressure (pneumatic) circuit according to the first embodiment shown in FIG. A flow rate sensor 32 for detecting the flow rate of the pressure fluid discharged from the pressure chamber 15 is provided. The pressure chamber 15 is a chamber that applies a backward drive fluid pressure to the cylinder rod 11 when the cylinder rod 11 is retracted.
[0036]
The flow rate sensor 32 has a switch characteristic as shown in FIG. 11, and this switch characteristic is switched to the ON state when the flow rate of the pressure fluid increases to the ON set value or more, and the flow rate of the pressure fluid is It is set to switch to the off state when it decreases below the off set value, and has hysteresis. When the supply pressure of the fluid pressure circuit is normal, the flow rate sensor 32 advances the cylinder rod 11 at a predetermined moving speed, and the flow rate of the pressure fluid discharged from the pressure chamber 15 is within a normal range (ON set value). Therefore, the ON state is maintained. On the other hand, the supply pressure of the fluid pressure circuit fluctuates (decreases), the forward moving speed of the cylinder rod 11 becomes zero or slow, the flow rate of the pressure fluid discharged from the pressure chamber 15 decreases, and is outside the normal range (off set value). The following will be switched to the off state. When the flow sensor 32 switches to the off state, the circuit power supply is turned off, the master valve 26 and the drive valve 27 are turned off, and the center rod 9 and the cylinder rod 11 are free as in the case where the pressure switch 28 is turned on. It becomes a state, that is, a safe state. If a lamp or the like is provided to inform the operator that the flow sensor 32 has been switched to the OFF state, the operator can easily recognize that the cause of turning off the circuit power supply is due to insufficient supply pressure. Then, it is possible to quickly take appropriate measures thereafter (inspection of the fluid pressure circuit, etc.). The flow rate sensor 32 is operable only when the cylinder rod 11 moves forward, that is, only during the movement from the retracted end to the advanced end. The retracted end is turned on by an ON signal from the retracted end sensor 31, and the advanced end is advanced. It is detected by an ON signal from the end sensor 29. Similarly to the flow sensor 32, the pressure switch 28 can be operated only during the forward movement of the cylinder rod 11, that is, only during the movement from the backward end to the forward end. Other configurations and operations are the same as those in the first embodiment described above.
[0037]
As described above, the component supply device according to the second embodiment includes the pressure chamber 15 that applies the backward drive fluid pressure to the cylinder rod 11 when the cylinder rod 11 is retracted, and the cylinder rod 11 is driven by the forward drive fluid pressure. When moving forward, the flow rate sensor 32 for detecting the flow rate of the pressure fluid discharged from the pressure chamber 15 by the advancement of the cylinder rod 11 is provided, and when the flow rate sensor 32 detects that the flow rate of the pressure fluid falls below a predetermined range. Then, the application of the forward drive fluid pressure is stopped. For this reason, even if the pressure switch 28 malfunctions due to fluctuations (decrease) in the supply pressure itself of the fluid pressure circuit, a decrease in the supply pressure can be detected based on the signal from the flow sensor 32. By notifying the operator with a lamp or the like, the operator can quickly take appropriate measures (inspection of the fluid pressure circuit, etc.) thereafter.
[0038]
In addition, a forward end sensor 29 for detecting the forward end of the cylinder rod 11 and a backward end sensor 31 for detecting the backward end of the cylinder rod 11 are provided. The pressure switch 28 and the flow rate sensor 32 are turned off. Thereafter, the operation becomes possible only during a period until the forward end sensor 29 is turned on. For this reason, it becomes possible to clearly recognize the contact with the worker or the like when the cylinder rod 11 moves forward and the supply abnormality of the fluid pressure circuit.
[0039]
In addition, although each embodiment mentioned above demonstrated the time when the component supply apparatus was operated in automatic operation mode, when an operator operates a component supply apparatus in manual operation mode, an operator's body is injured. I can protect it.
[0040]
That is, when initializing the component supply device (when the center rod 9 is aligned with the lower electrode 201), or when checking the operation of the device for some reason during the work, Then, the device is switched to the manual operation mode, and the operation switch (stroke switch) is turned on to advance the center rod. The forward movement of the center rod 9 is performed by turning on the drive valve 27 and supplying the pressure fluid to the pressure chamber 15A as in the automatic operation mode described above. When the operator's hand or the like touches the center rod 9 during the forward movement, the master valve 26 and the drive valve 27 are turned off by turning on the pressure switch 28 as in the automatic operation mode, and the center rod 9 and The cylinder rod 11 becomes free and can protect the operator's body from injury. When the operation switch is turned on, the forward end sensor 29 is maintained in the OFF state. Therefore, when the center rod 9 moves forward to the forward end, the drive valve 27 is not switched off and the center rod 9 does not move backward. For this reason, in order to retract the center rod 9, the operator returns the operation switch to the original state and performs an operation of switching to the automatic operation mode.
[0041]
【The invention's effect】
According to the component supply device of the present invention, in a device that does not have an automatic stop mechanism, when a worker enters the work area and the component supply rod comes into contact with the body due to a simple and inexpensive configuration, the body is protected from injury. I can protect it.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a component supply apparatus according to a first embodiment of the present invention.
FIG. 2 is an enlarged view of a portion II shown in FIG.
FIG. 3 is an enlarged view of a portion III shown in FIG. 1;
4 is an enlarged view of the IV portion shown in FIG. 1. FIG.
5 is a cross-sectional view taken along VV in FIG.
6 is a view taken along arrow VI of FIG.
FIG. 7 is a fluid pressure (pneumatic) circuit diagram.
FIG. 8 is a cross-sectional view of a main part when an abnormality occurs.
FIG. 9 is a cross-sectional view of a component supply apparatus according to a second embodiment of the present invention.
FIG. 10 is a basic configuration diagram of a fluid pressure (pneumatic) circuit.
FIG. 11 is a switch characteristic diagram of the flow sensor.
[Explanation of symbols]
100 Parts supply device 400 Parts 203 Welding place (positioning pin)
9 Center rod 9a Tip 11 Cylinder rod 12 Guide 14 Pressure relief passage 28 Pressure switch 29 Advance end sensor 31 Back end sensor 32 Flow rate sensor

Claims (5)

In parts supply equipment that supplies parts such as nuts to welding locations,
A center rod and a cylinder rod arranged concentrically and separable from each other in the front-rear direction;
A guide for the center rod fixed to an end of the cylinder rod;
A pressure relief passage formed between the outer peripheral surface of the center rod and the inner peripheral surface of the cylinder rod;
The center rod and the cylinder rod receive fluid pressure, and usually advance and retreat as a unit, and engage the part with the tip of the center rod during advance and supply it to the welding place.
When the front end of the center rod collides with an obstacle during advance, the center rod and the cylinder rod are separated from each other to open the pressure relief passage, and the center rod and the cylinder rod are driven forward. The component supply device, wherein the pressure is reduced through the pressure relief passage. 2. The component supply device according to claim 1, further comprising a pressure switch that detects a decrease in the forward drive fluid pressure, and stopping application of the forward drive fluid pressure when the pressure switch detects the decrease in pressure. When the cylinder rod is retracted, a pressure chamber for applying a backward drive fluid pressure to the cylinder rod is provided, and when the cylinder rod is advanced by the forward drive fluid pressure, the cylinder rod is discharged from the pressure chamber by the advance of the cylinder rod. A flow rate sensor for detecting the flow rate of the pressure fluid, and stopping the application of the forward drive fluid pressure when the flow rate sensor detects that the flow rate of the pressure fluid falls below a predetermined range. The component supply apparatus according to claim 2. A forward end sensor that detects a forward end of the cylinder rod; and a backward end sensor that detects a backward end of the cylinder rod; and the pressure switch and the flow rate sensor are configured to move forward after the backward end sensor is turned off. 4. The component supply device according to claim 3, wherein the component supply device is operable only during a period until the end sensor is turned on. 5. The component supply device according to claim 1, wherein the cylinder rod and the guide are excited during advance.

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