JPH08329803A - Control switch - Google Patents

Abstract

PURPOSE: To prevent failure in a switch and establish a safe operation with an air tool by sensing the pressure air supplied to the air tool, and allowing other accessory tool to work interlockingly. CONSTITUTION: An air introducing port 4 to introduce a pressure air to an air tool and a lead-out port 5 provided at a certain distance from the port 4 are put in communication with a piston slide hole 2 in a cylinder 1. The piston 6 in the hole 2 is arranged practicable to be energized toward the port 4. The piston 6 is made slidable toward the lead-out port 5 when the pressure air is introduced. The circuit of a switch 20 is opened and closed by the tip of a rod 10 connected in the axial direction of the piston 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention detects pressurized air supplied to an air tool such as an air motor, an air driver, an air cylinder, etc., and operates other accessory tools such as a prime mover, a parts feeder, a cylinder, and a solenoid. The present invention relates to a control switch that can be operated.

[0002]

2. Description of the Related Art Conventionally, there are air tools such as an air motor, an air driver, and an air cylinder. In order to interlock with the operation of this air tool, it is known how to operate a switch provided on the hand-held air tool body to operate other accessory tools such as a prime mover, a parts feeder, a cylinder, and a solenoid. There is. In this conventional method, an operation switch is arranged on the air tool or a sensor for monitoring the operation is arranged on the air tool. Then, the switch and the accessory tool are connected with an electric cable to operate the accessory tool.

[0003]

However, this conventional method has the following problems because the sensor is arranged in the air tool and the switch is connected to the air tool. That is, since the switch and the sensor are easily subjected to the vibrations and shocks generated by the air tool, the switch and the sensor are likely to be damaged. Further, since the switch and the sensor are provided, the air tool device, which is often operated by hand, becomes large in size, resulting in poor workability. Further, the electric cable connected to the switch or the sensor may cause slack in the periphery of the air tool, which may hinder the operation of the air tool.

In order to solve the above problems, the present invention provides
Pressurized air supplied to the air tool is detected by a control switch that is arranged separately from the air tool, and the circuit of the accessory tool is automatically opened and closed to operate the accessory tool in conjunction with the operation of the air tool. It is the one trying to operate. Further, the control switch is arranged separately from the air tool, and the vibration and impact of the air tool are not received, and the occurrence of switch failure is prevented. Further, it is not necessary to dispose an electric cable for a control switch around the air tool, and it is intended to improve the operation of the air tool and enable safe operation.

[0005]

In order to solve the above-mentioned problems, the present invention provides a cylinder in which an inlet for pressurized air communicating with an air tool and an outlet for pressurized air are provided at regular intervals. It is connected to the piston sliding port of the body, and the piston is closely inserted so that it can slide in the space between the inlet and outlet in the piston sliding port. When pressurized air is introduced from, it is slidable in the direction of the outlet by fluid pressure.A rod is connected in the axial direction of the piston on the inlet side of this pressurized air to project outward from the cylinder body. By moving back and forth as the piston slides, the circuit of the switch arranged facing the tip of the rod can be opened and closed.

[0006]

In the structure constructed as described above, the air tool is operated by supplying pressurized air. The pressurized air supplied to this air tool is introduced into the introduction port of the cylinder body to increase the pressure in the piston sliding port. Further, the piston sliding port has a piston closely inserted in a space between the inlet and the outlet. Therefore, the pressurized air presses and urges the piston toward the outlet.

Along with this pressing force, the piston moves in the direction of the outlet from the distance between the inlet and the outlet. Then, when the piston moves the end portion on the inlet side inward from the opening edge of the outlet, the inlet and the outlet are communicated with each other through the piston sliding port, and pressurized air is supplied via the outlet. Discharge. Further, this communication state continues as long as pressurized air is introduced from the introduction port.

Further, the piston retracts the rod outside the cylinder body as it moves in the direction of the outlet. Then, the rod opens or closes the switch facing the tip, and in conjunction with the operation of the air tool, the circuit of the switch of the attached tool can be opened or closed.

When the supply of the pressurized air is stopped, the air tool is stopped. Then, in the cylinder body, the introduction of the pressurized air to the introduction port is stopped, and the pressure on the introduction port side and the pressure on the discharge port side in the piston sliding port become substantially the same. Therefore, the piston biased toward the introduction port moves toward the introduction port.

Further, due to the movement of the piston, the rod largely projects to the outside of the cylinder body. Then, the rod closes or opens the switch facing the tip, and in conjunction with the operation of the air tool, the circuit of the switch of the attached tool can be closed or opened.

As described above, according to the present invention, the circuit of the switch is opened / closed by the pressurized air supplied to the air tool. Therefore, the pressurized air can be guided to a place different from the air tool. Unlike the conventional method, it is not necessary to dispose a switch for controlling the attached tool on the side of the air tool, and it is possible to protect the switch from vibration or impact generated by the air tool. Further, according to the present invention, since the control switch can be arranged away from the air tool, it is not necessary to arrange an electric cable for connecting to the switch around the air tool, which improves the operability of the air tool and ensures safe work. Is possible.

[0012]

[Embodiment] As described above, the present invention can operate accessory tools such as a prime mover, a parts feeder, a cylinder, and a solenoid in conjunction with an air tool such as an air motor, an air driver, an air cylinder, and an impact wrench. Which, in combination with an appropriate mechanism,
It can be used in various industrial fields. Then, in one embodiment, the case where the control switch of the present invention is arranged in an air driver and the parts feeder for screw supply is interlocked with the operation of the air driver will be described with reference to the drawings.

First, (1) is a cylinder body, which is recessed from one end in the axial direction, and has a bottomed piston sliding port (2) as shown in FIGS. Place the abutment wall (3). Further, the cylinder body (1) has an inlet (4) for pressurized air opened on the outer peripheral surface, and the inlet (4) is used as a piston sliding port.
It communicates with (2).

Further, on the outer peripheral surface of the cylinder body (1), a pressurized air outlet (5) is opened from the inlet (4) at a constant interval in the axial direction, and the outlet (5) is formed. Is communicated with the piston sliding port (2) as shown in FIGS. Further, the cylinder body (1) has an inlet (4) inside the piston sliding port (2).
The piston (6) is slidably and closely inserted into the space between the discharge port (5) and the discharge port (5) so that the piston (6) can slide in the piston sliding port (2). Also, this piston (6) has an inlet
By moving the end on the (4) side to the inside of the opening edge of the outlet port (5), the outlet port (5) and the inlet port (4) are communicated via the piston sliding port (2). I will get it. Further, the piston (6) is formed with supports (7) and (8) at both ends, which slidably contact the outer periphery of the piston sliding port (2),
(2) Enables stable sliding within. Also the support
(7) (8) is a concave groove (36) for circulating compressed air in the outer peripheral axial direction.
(37) is formed. Also, the piston (6) has an inlet
The rod (10) is connected to the tip of the (4) side so as to project in the axial direction.

Also, a mounting groove (11) is provided at the end of the support (8).
And the urging spring (12) is mounted in the space between the mounting groove (11) and the end of the piston sliding port (2), and the piston (6)
Is urged toward the inlet (4). Also, the piston (6) is
When pressurized air is introduced from the inlet (4), it is slidable toward the outlet (5) by fluid pressure.

Further, as shown in FIGS. 1 and 2, the cylinder body (1) has a locking step portion (13) formed on the end face on the introduction port (4) side, and this locking step portion (13) is It is fitted with a bush (14). Further, the cylinder body (1) has a rod cover (15) arranged on the outer surface side of the bush (14). This rod cover
(15) has a through hole (16) opened in the shaft core, and this through hole
The rod (10) of the piston (6) is projected outward from (16). Further, the rod cover (15) has a bush (14).
A packing (17) is mounted between the above and the outer circumference of the rod (10) in an airtight manner.

The cylinder body (1) is a rod cover.
The support plate (18) is fixed to the outer surface side of (15),
In (18), as shown in FIGS. 1 and 2, the limit switch,
Switches (20) such as sensors are connected. And
The sensing part (21) of the switch (20) is arranged facing the tip of the rod (10). When formed in this way,
The switch (20) is a part for detecting the sliding movement of the piston (6).
It can be detected by (21), and it is possible to accurately open and close the circuit of the accessory tool (22).

Further, (23) in FIG. 3 is an air driver, which is a bit (2) rotated by an air motor (24).
Insert 5) into the slider body (26). Also, the air driver (23) connects the air cylinder (27) to the slider body (26) and the air motor (24),
An air motor (24) is vertically movable with respect to the slider body (26). Also, this air motor
The reference numeral (24) connects the inlet (4) of the cylinder body (1) to the supply inlet (28) for the pressurized air via the connecting pipe (30).
Also, the slider body (26) has a screw insertion path in the axial direction.
(31) is formed and the screw insertion path (31) is formed from the outer peripheral surface.
Through the screw introduction path (32) in the direction. Also, the slider body (26) has a screw (33) and a tube (33).
It is possible to supply the screw (34) to the screw insertion path (31) by connecting to the accessory tool (22) consisting of a parts feeder via the.

In the structure constructed as described above, the screw (3
4) To tighten the work, tighten the air motor (24).
Supply pressurized air to the air motor (24) bit
Rotate (25). Then, at the tip of the bit (25), the head (3) of the screw (34) inserted into the screw insertion path (31) is
By rotating 5), the screw 34 can be tightened and fixed to the target portion.

Further, in the operating state of the air motor (24), the cylinder body (1) introduces pressurized air into the introduction port (4) to increase the pressure in the piston sliding port (2). Therefore, the piston sliding port (2) prevents the piston (6) arranged in the interval between the inlet (4) and the outlet (5) from resisting the urging force of the urging spring (12). As shown in FIG. 5, the slide is pressed and slid toward the outlet (5).

When the end of the piston (6) on the side of the inlet (4) moves inward from the opening edge of the outlet (5),
The piston sliding port (2) allows the inlet port (4) and the outlet port (5) to communicate with each other. Then, the pressurized air introduced into the piston sliding port (2) from the introduction port (4) flows into the outlet port (5) through the flow groove (36) of the support (7). Further, the communication state of the piston (6) continues as long as the pressurized air is introduced from the introduction port (4). Further, as the piston (6) moves, the inside of the piston sliding port (2) on the side of the abutment wall (3) contracts in volume, but through the flow groove (37) of the support (8). Since it communicates with the outlet port (5), the pressure becomes substantially the same as that of the outlet port (5).

The piston (6) is, as shown in FIG.
The rod (10) is retracted as it moves toward the outlet (5). Then, the piston (6) operates the switch (20) facing the tip of the rod (10) to open the circuit of this switch (20). Therefore, the switch (20) stops the accessory tool (22) consisting of a parts feeder, and stops the supply of the screw (34) to the slider body (26).

In order to supply the next screw (34) to the slider body (26) after tightening and fixing the screw (34), first, the supply of the pressurized air to the air motor (24) is stopped, Stop the rotation of the bit (25). When the air cylinder (27) is extended and the air motor (24) is lifted from the slider body (26), the slider body (26)
From the screw insertion path (31) of the, bit (25) as shown in FIG.
Retreat.

When the supply of the pressurized air to the air motor (24) is stopped, the cylinder body (22) is closed by the inlet port.
Since pressurized air cannot be introduced from (4), the pressure on the inlet (4) side in the piston sliding port (2) becomes substantially the same as the pressure on the outlet (5) side. Therefore, the introduction port (4) by the urging spring (12)
The piston (6) biased in the direction moves in the piston sliding port (22) toward the inlet (4) as shown in FIG.

With the movement of the piston (6), the rod (10) projects to the outside of the cylinder body (1),
As shown in, the switch (20) facing the tip is operated. Therefore, the switch (20) closes the circuit,
Activate the accessory tool (22). For this reason, the included tools
(22) is a slider body (2
It is possible to supply the screw (34) to the screw introduction path (32) of 6).

[0026]

Since the present invention is configured as described above, when operating other accessory tools in conjunction with the air tool, the circuit of the switch is opened / closed by the pressurized air supplied to the air tool. Therefore, the pressurized air can be guided to the control switch arranged at a place different from the air tool. Therefore, unlike the conventional method, it is not necessary to dispose a switch for controlling the attached tool on the side of the air tool, and it is possible to protect the switch from vibration or impact generated by the air tool.

Further, according to the present invention, since the control switch can be arranged away from the air tool, it is not necessary to arrange an electric cable connected to the switch around the air tool, and the operability of the air tool is improved, This enables safe work.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a control switch.

FIG. 2 is a sectional view showing an operating state of a control switch.

FIG. 3 is a sectional view of an air driver in which a control switch is arranged.

[Explanation of symbols]

 1 Cylinder body 2 Piston sliding port 4 Inlet port 5 Outlet port 6 Piston 7 Rod 17 Switch

Claims (1)

[Claims] 1. An inlet for pressurized air, which communicates with an air tool, and an outlet for pressurized air are connected to a piston sliding port of a cylinder body at a fixed interval. The piston is closely inserted so that it can slide in the space between the inlet and outlet, and the piston is biased toward the inlet and slid toward the outlet by fluid pressure when introducing pressurized air from the inlet. The rod is connected to a rod in the axial direction of the piston on the inlet side of this pressurized air and protrudes outward from the cylinder body. A control switch characterized by being able to open and close the circuit of the switch placed facing it.