JPS6352974A - Air nutter - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is directed to an air nut (functionally the same as an air riveter) used for, for example, fixing two panels together using a nut member. ), and in particular improves the operability of the air nutter.
The improved version can be used in the industrial field of manufacturing technology for tools of this type.

(Prior Art) A nut member having a female thread formed on the inner periphery of a sleeve having a flange is inserted into, for example, a mounting hole in two joined panels, and a screw mandrel of an air nut is inserted into the nut member. are screwed together, and the screw mandrel is moved back to the inside of the main body of the air nut while pressing the flange of the member against the side of the panel, thereby causing the sleeve portion of the nut member to bulge outward and deform. The overall structure of an electric nut that clamps and fixes two panels between the deformed sleeve portion and the flange of the sleeve (for example,
-4674, etc.) is publicly known. (Problem to be Solved by the Invention! ¥8) By the way, the above-mentioned screw mandrel for deforming the nut member is first used to screw the nut member onto the screw mandrel. The nut member is first rotated in the forward direction, then subjected to a tensile action in a non-rotating state in order to deform the nut member, and then rotated in the reverse direction to detach it from the nut member to which it is fixed, such as the fire chopsticks, panel, etc. Each of these actions must be performed automatically and continuously in conjunction with the work of fixing the nut member to the panel, etc. Therefore, the power transmission and switching operations for performing each of the above actions must be performed smoothly. It is extremely important that the fixing process is carried out reliably, and that each of its actions is carried out reliably in correspondence with each process of the above-mentioned fixing work of the nut member.

The present invention provides an air nutter that uses compressed air as a driving source, by smoothly and reliably performing each of the automatic and continuous actions of the air nutter as described above, thereby improving the operability and workability of the air nutter. The object of the present invention is to provide an air nut that can improve the air quality.

(Means for Solving the Problems) The air nutter (or air riveter) according to the present invention moves an air piston fitted in an air cylinder forward to pressurize oil stored in the machine body. By moving the oil piston backward and moving the screw mandrel attached to the tip of the oil piston backward toward the inside of the machine body, a deforming force is applied to the sleeve part of the screw mandrel (the nut member ζ screwed thereon). In the air nutter, an air motor rotated by compressed air is disposed inside the body of the air nutter, and the air motor is connected between the air motor and the compressed air supply port in the body of the machine. An air introduction passage for rotational drive is provided,
Further, a forward/reverse rotation direction switching operation mechanism for the air motor for switching the rotation direction of the air motor is disposed in the path of the passage, and the near motor is disposed between the air motor and the one-ferment screw mandrel. A power transmission mechanism is provided to transmit the forward and reverse rotational driving force of the screw mandrel to the screw mandrel. forming an air introduction passage for forward movement of the air piston;
Further, a spool for opening and closing the air introduction passage is slidably fitted into the communication hole formed in communication with the air introduction passage for forward movement of the air piston, and the communication hole for fitting the spool and the above-mentioned An air introduction part for controlling the spool is formed between the compressed air supply port and the spool in the hole by compressed air in the closing direction of the air introduction passage for forward movement of the air piston. A passage for discharging the compressed air introduced into the air introduction section is disposed between the sensing section and a compressed air discharge port formed in the machine body near the power transmission mechanism section, and A clutch member of the power transmission mechanism that also serves as an opening/closing member for the passage is disposed in the path of the discharge passage, and the discharge passage is arranged so that the clutch member is rotated to a predetermined rotational angle position by a predetermined rotational torque. The device is characterized in that it is arranged so that communication is opened when the device is moved.

(Operation) Therefore, according to the t3 formation fζ of the present invention, a series of operations such as forward rotation, rotation stop and backward movement, further reverse rotation and forward movement with respect to the screw mandrel can be performed smoothly and continuously. Can be done.

Therefore, it is easy to thread the nut member onto the core screw mandrel during forward rotation of the screw mandrel, and then, when the flange of the threaded nut member is pressed against the side surface of the mounting hole, the nut member The screw mandrel is fixed and moves relatively forward, and the flange and the machine body side are joined and fixed, and the rotation of the screw mandrel is stopped. By this rotation stop, the clutch member of the power transmission mechanism is rotated to a predetermined rotation angle position fζ, and at this time, the communication hole formed in the clutch member and the spool for opening/closing the air introduction passage for forward movement of the air piston are Since the air discharge passage consisting of the control air introduction part and the air discharge port of the machine body is opened and the control on the spool is released, the spool opens the air introduction passage for forward movement of the air piston and compresses the air. Introduce air into the air cylinder.

The air piston introduced into the air cylinder moves forward to pressurize the oil inside the machine body, and this oil pressure causes the oil piston and the screw mandrel attached to it to move backward at the same time, deforming the nut member. . When a predetermined pressing force on the oil, that is, oil pressure that can push the oil piston to a predetermined retracted position in order to reliably deform the nut member, is obtained, the air motor rotates in the rotational direction. When the switching operation mechanism is activated to reversely rotate the air motor,
The clutch member rotates back to its original position and closes the air discharge passage. Therefore, the spool of the air introduction passage for forward movement of the air piston is moved back to the original position 1 by the compressed air and closes the passage, so that the force for the forward movement of the air piston is released. Note that the air piston moves back as the oil piston moves forward due to the turning spring, but during the return movement of the air piston, the air introduction passage for driving the rotation of the air motor must be kept open. During this time, the air motor can be rotated in reverse, thus allowing the screw mandrel to be disengaged from the nut member secured to the mounting hole.

When the passage is closed after each of these actions is completed,
Since the switching spool in the rotational direction switching operation mechanism is returned to its original position by the turning spring, the spool can switch the air introduction passage for driving the rotation of the air motor to a state in which the air motor is rotated in the forward direction. be.

(Example) Next, the present invention will be explained based on embodiment figures.

FIG. 1 shows the air nut of the present invention, which includes an oil storage section 2. The machine body frame 2 is formed with a frame 2, an air cylinder 8 disposed at the bottom of the frame 2, an air piston 4 for pressurizing the oil 1 fitted in the air cylinder 8, and the frame 2.
The oil storage portion 2. of the frame is located in the upper position of the frame. an oil cylinder 5 in communication with Cζ, an oil piston 6 fitted in the oil cylinder δ, and a through hole 6 formed in the infant center of the oil piston 6 to move the oil piston 6 forward. A square shaft 9 for transmitting rotational force having a rectangular cross section (hexagonal cross section in the example shown) fitted into the shaft so that it can rotate freely in the circumferential direction, and a flying shaft fixed to the front end of the square shaft 9. A screw mandrel 10 engaged with each other so as to rotate integrally in the circumferential direction via a member 9J, a connector 11 attached to the front end of the machine body frame 2, and a nose piece attached to the front end of the connector 11. 12.

Further, a compressed air motor 18 for rotating the square shaft 9 is disposed at a rear position of the square shaft 9, and a compressed air motor 18 is installed between the air motor 18 and the machine body (air cylinder 8 in the example). An air introduction passage 15 for driving the rotation of the air motor is disposed between the compressed air supply port 14 and the compressed air supply port 14. The air introduction passage 15 is connected to the supply port 141.
(See diagram T2) through the communication hole 15. and an air passage 15 formed inside the machine body. and the communication hole 15. and air passage 16. Air hose 15. It is composed of. In addition, the passage 15. Inside the passage 15. An on-off valve mechanism 16 is arranged, and a valve body 16 of n16 is disposed. Under normal conditions, the spring 16. Due to the elasticity of the passage 15. is being pushed in the direction of occluding the
As shown in FIG. 1, the valve body 161 is attached to a spring 16.
When pushed against the elasticity of the passage 15. is opened, and the air supply port 14 and the air motor H1 (!!I) are in communication through the passage 15.

Further, an air introduction passage 17 for forward movement of the air piston is provided between the air supply port 14 and the air introduction hole 81 of the air cylinder 8 which is the forward A side of the air piston 4.
is installed. The air introduction passage 17 is a communication hole 17. which is connected to the supply port 14. , the communication hole 17, and a communication hole 72 between the air introduction hole a1 and the air introduction hole a1. In addition, the communication hole 17. A communication hole 18 (in which the opening/closing spool 19 of the air introduction passage 17 is slidably fitted) is formed by communicating with the communication hole 18 and the supply port 14. The spool 19 is between
An air circulation hole 19. formed in the spool 19 receives the air supplied from the spool 171 which moves the air in the direction of closing the air introduction passage 17 using air. The air introduced into the introduction part 20 moves the spool 19 through the introduction hole 8 of the cylinder by the air pressure lζ. @! 1, and the gasket 19° provided on the spool 19 connects to the communication hole 17.I. The passage 17 is closed by being pressed. In addition, the spool 1
9 uses the pressure of the air supplied from the communication hole 17φ to apply a pushing force in the direction of closing the passage 17 by the spool 19 to the large diameter portion of the spool 19 and the surface 19.
4 corresponds to the area of the large-diameter lower surface ff1lh, so when the air is introduced into the groove entry portion 201, it is received on the large-diameter upper surface 194 rather than on the ground of the large-diameter lower surface 19R. Since it receives a large pushing force, it does not work effectively, and therefore, at this time, the spool 19
This will result in a pushing force being applied in the direction of closing the area.

Further, in the path of the air introduction passage 15 for driving the rotation of the air motor, there is provided a forward/reverse rotation direction switching operation groove 21 for switching the rotation direction of the air motor by applying a predetermined pressing force to the oil 1, which will be described later. It is set up.

This machine t321 has a bushing 21. which is connected to the air introduction passage 16. and the bushing 21. A spool 21 for switching the air flow path fitted inside. and the spool 21
A returning spring 21. for pushing the air motor 1B toward the forward rotation side. The spool 21 . Air motor 18
from the spool 214 (
4 has been completed. This i? The air flow path switching operation using :421 is performed as follows. That is, in the normal state, as shown in FIGS. 1 and 4, the switching spool 21. is spring 21. The pushing spool 214 is also moved in the n direction by the elasticity of the returning springs 21 . is moved forward by the elasticity of In this state, the air supplied through the passage lδ is passed through the air introduction hole 216 formed in the bushing 211 and into the housing space 18 of the air motor 18.
．． The air outlet on the forward rotation side (not shown) formed in
Air delivery hole 21. By passing through the flaw and being ejected into the accommodation space IS, the air becomes a driving force that rotates the air motor 18 in the forward direction. Further, as will be described later, when the pressure applied to the oil 1 is increased to a predetermined level or more, the pushing spool 214 moves to the returning spring 21° (and the returning spring 21.
The switching spool 2 is moved backward against the elasticity of the switching spool 2.
1. is pushed backwards as shown in FIG. However, at this time, the switching spool 21. The front end surface of the bushing 21. The air introduction hole 21 formed above.
When the bushing 21. Air is introduced into the switching spool 21. will be reliably moved backwards by the air pressure. Moreover, this switching spool 21. When the spool 21. is in the backward transfer state, the spool 21. The air delivery hole 21 described above. are communicated with the exhaust hole 21.0, and the air introduction hole 21.0 is connected to the air introduction hole 21.0. is in communication with an air outlet hole (not shown) (not shown) on the opposite rotation side formed in the housing space 1B of the air motor. This is the driving force that rotates the motor in the opposite direction.

Further, a power transmitter 22 is disposed between the air motor 18 and the screw mandrel 10 for transmitting the above-mentioned forward and reverse rotational driving force of the air motor 18 to the screw mandrel lO side. There is.

This machine PI 122 has a transmission gear 18. several planetary gears 22 meshed with
゜, the gear 221 is moved to the pin 22 at both front and rear positions of the gear. 4. Pivot member of the gear 22. -224 and the gear 22.
A clutch member 22□ fitted to the outer periphery of the clutch member 22. FIFB is provided from a turning spring 226 to rotate the holder in a predetermined circumferential direction.

Both pivot members 22.・224 is gear 221 and pin 2
2. The clutch member 22. is provided so that it can rotate simultaneously with the rotation of the clutch member 22. are elastically hung on the machine body side via a spring 226, therefore, in normal conditions, the planetary gears 22. While rotating, they are guided by an inner gear 22a formed on the inner peripheral surface of the clutch member 221, l, and are simultaneously revolved. Further, a square hole 228 that engages with the rear end of the square shaft 9 is formed in the axial center of the front pivot member 221. For this reason, the air motor 18
The forward and reverse circumferential rotation and force of the transmission gear 18.・Planetary gear 2
2 Topin 22. - Pivot member 22. - It will be transmitted to the front screw mandrel 10 via the corner @9 (and the corner shaft member 9,).

Moreover, between the control air introduction part 20 of the opening/closing spool 19 described above and the air discharge port 28 formed in the main body of the power transmission machine (near the R22 section), the air in the air introduction part 20 is discharged. An air discharge passage 24 is disposed between the air introduction portion 20 and the air delivery hole 24 opened at the front position of the clutch member 22 in the first transmission device 22. The air vibrator 24 and the air hose 243 are connected to each other for communication between the air vibrator 24 and the air hose 243. Furthermore, the clutch member portion is connected between the air delivery hole 241 and the air discharge port 28 by a predetermined rotational torque, which will be described later. When the clutch member is rotated to a predetermined rotation angle position, the clutch member is provided so as to communicate through a communication hole formed in the clutch member.

That is, when the valve body 161 is opened and the air motor 18 is rotated in the forward direction, the screw mandrel lO is also rotated in the forward direction, so in this state, the nut member 25 is screwed onto the screw mandrel 10, and then, in that state, As shown in FIG. 1, the nut member 25 is inserted into the mounting hole 261 formed in the two panels 26, and the flange 5. Remove the hole 26. When the rotation of the nut member 25 is stopped by pressing against the side surface of the nut member 25, the screw mandrel 1G (machine main body side) moves relatively forward.

This advancement causes the flange 5 of the nut member. When the screw mandrel 10 and the north heath 12 are joined and fixed, the screw mandrel 10 becomes locked and stops rotating.

However, since the air motor 18 continues to rotate in the forward direction, the transmission gear 18. will cause the planetary gear to rotate, and for this reason, the clutch member will have a spring,
It is rotated forward to a predetermined rotational angular displacement U against the elasticity of. This predetermined rotational angular displacement is in percent when the knock pin 27 shown in FIG. , and when the clutch member 22 is rotated to that position, the clutch member 22. The communicating hole 22. The air delivery hole 241 and the discharge port 28 can be communicated with each other.

The air delivery hole 24 mentioned above. The communication between and the discharge port 28 is as follows.
The air introduced into the air introduction section 20 through the air discharge passage 24 is discharged to the outside of the machine.

Therefore, at this time, the air pressure within the introduction section 20 decreases and the control over the spool 19 is released.
The spool 19 has a supply port 14 and a communication hole 17. The end surface of the large-diameter lower surface 198 is pressed by the air pressure supplied from the air pressure and is pushed in the direction toward the entire Jifi path 17. When the passage 17 is opened, air flows through the communication hole 17. and cylinder air introduction hole8. through air cylinder 8
Since the air piston 4 is supplied to the inside of the piston rod 4. fits into the oil storage part 2 and pressurizes the oil l in the storage part. By pressurizing the oil 1, the oil piston 6 is moved by the returning spring 7.
However, since the pivot member 8 provided at the front reservoir of the oil piston 6 simultaneously retreats the screw mandrel 10, the sleeve portion # of the nut member
5. The nut member 25 can be deformed by bulging outward and fixing the panel 26 between the deformable sleeve portion and the flange 251. This deformation action of the nut member 25 is performed while the oil piston 6 is moved to a predetermined rearward position by oil pressure. In addition, the oil cylinder 6 and the oil introduction part 28 for operating the push spool 214 in the air motor forward/reverse rotation switching operation aF7421 mentioned above are connected to the oil passage 2.
Since the oil introducing portion 28 is provided in communication with the oil introduction portion 28, a predetermined oil pressure as described above is also applied to the oil introduction portion 28. Therefore, when the deformation action of the nut member 25 is completed, the predetermined oil pressure is applied to the oil introduction portion 28. The pushing spool 21. is moved rearward, thereby causing the air motor 18 to rotate in the opposite direction as described above.

When the air motor 18 is reversely rotated, the clutch member 22
．． i is rotated back to the original position by the elasticity of the returning spring 226 and the reverse rotation of the planetary gear 221, thereby closing the air discharge passage 24 again.

Therefore, air is introduced into the air introducing portion 20 again and the spool 19 closes the passage 17, so that the forward movement force on the air piston 4 is eliminated, and the pressurizing action of the oil 1 by the piston rod 41 is stopped. .

Therefore, the pushing spool 214 and the oil piston 6 are connected to the turning spring 21.・It moves back forward due to the elasticity of 7.

Valve body 16. Air introduction hole 21. formed in the front part of the bushing by opening. Since the air motor 18 continues to rotate in reverse while air is being supplied to the screw mandrel 10, the screw mandrel 10 retreats and separates from the nut member 25 which is fixed to the mounting hole 267 while being rotated in the reverse direction. That night, when the valve body 16□ is closed, the switching spool 21! is returned to the original position in front by the elasticity of the returning spring 211 and becomes the normal state.

In addition, the reference numerals 29, 80, and 81 in the figure are air circulation holes that communicate the inside of the air cylinder 8 with the outside, and the reference numeral 82 is the return spring 21. This figure shows the adjustment bolt for adjusting the spring elasticity of the spring.

(Effects of the Invention) According to the four components of the present invention, a series of operations such as forward rotation, one-turn pressure doubling, and backward movement, as well as reverse rotation and forward movement, can be performed smoothly and continuously on the screw mandrel. Therefore, it has excellent practical effects such as improving the operability and workability of an air nutter using compressed air as a driving source.

[Brief explanation of the drawing]

The figure shows an embodiment of the air nut of the present invention.
Fig. 1 is a partially cutaway longitudinal sectional view of the whole, Fig. 2 is a longitudinal sectional view of the compressed air supply port, Fig. 8 is a longitudinal sectional view of the power transmission groove, and Figs. 4 and 5 are It is an explanatory view of the operation of the forward/reverse rotation direction switching operation device F4. (Explanation of symbols) 1... Oil, 2... Machine body frame, 8... Air cylinder, a,... Air introduction hole, 4... Air piston, 6... Oil piston, 10 ...Screw mandrel, 1B...Air motor, 14
...Air supply port, 15...Air introduction passage, lε
... Valve closing machine (('4.17... Air introduction passage,
18...Communication hole portion, 19...Opening/closing spool, 20...
...Air introduction part, 21...Forward/reverse rotation direction switching operation device purchase, 22...Power transmission groove, 28...Air discharge port, 24...Air discharge passage, 25 Pa/nut member ,
252...Sleeve portion, 26...Panel, 28.
...Oil introduction part. Figure 2 and Figure 4 V 11. .

Claims (1)

[Claims] By moving the air piston fitted in the air cylinder forward and pressurizing the oil stored in the machine body, the oil piston is moved backward, and the screw mandrel attached to the tip of the oil piston is moved inside the machine body. In an air nutter configured to apply a deforming force to a sleeve portion of a nut member threaded onto the screw mandrel by moving backward to the side, an air motor rotated by compressed air is installed inside the main body of the air nutter. At the same time, an air introduction passage for driving the rotation of the air motor is arranged between the air motor and a compressed air supply port in the machine body, and an air introduction passage for driving the rotation of the air motor is provided in the path of the passage. A forward/reverse rotation direction switching operation mechanism of the air motor for switching the direction is provided, and
A power transmission mechanism is disposed between the air motor and the screw mandrel to transmit both forward and reverse rotational driving force of the air motor to the screw mandrel, and a power transmission mechanism is provided between the compressed air supply port and the air piston. An air introduction passage for forward movement of the air piston is formed between the air introduction hole of the air cylinder on the moving side, and an air introduction passage for forward movement of the air piston is formed in a communication hole portion formed in communication with the air introduction passage for forward movement of the air piston. A spool for opening and closing the air introduction passage is slidably fitted, and the spool in the hole is inserted between the communicating hole for fitting the spool and the compressed air supply port to supply the air by compressed air. A control air introduction part is formed for the spool to be moved forward in the direction of closing the air introduction passage for piston forward movement, and the air introduction part is connected to a compressed air discharge port formed in the machine body near the power transmission mechanism part. A passageway for discharging the compressed air introduced into the air introduction section is provided between the two, and a clutch member of the power transmission mechanism that also serves as an opening/closing member for the passageway is disposed in the path of the discharge passageway. In addition, the discharge passage is arranged and configured so that communication is opened when the clutch member is rotated to a predetermined rotation angle position by a predetermined rotational torque. Nutter.