WO2003013795A1 - Tournevis a chocs pneumatique - Google Patents
Tournevis a chocs pneumatique Download PDFInfo
- Publication number
- WO2003013795A1 WO2003013795A1 PCT/JP2002/008073 JP0208073W WO03013795A1 WO 2003013795 A1 WO2003013795 A1 WO 2003013795A1 JP 0208073 W JP0208073 W JP 0208073W WO 03013795 A1 WO03013795 A1 WO 03013795A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- valve
- air
- contact
- nose
- port
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
- B25B21/02—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with means for imparting impact to screwdriver blade or nut socket
- B25B21/023—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with means for imparting impact to screwdriver blade or nut socket for imparting an axial impact, e.g. for self-tapping screws
Definitions
- the present invention relates to an air impact driver using a connecting screw, and more particularly to an air impact driver capable of retightening.
- an air impact driver capable of performing a continuous screw tightening operation using a connecting screw in which a number of screws are connected in a belt shape.
- This type of air impact driver is different from an air impact driver that merely drives the driver bit to rotate, and the driver bit is driven forward by an air cylinder and the driver bit is driven to rotate by an air motor.
- the trigger lever When the trigger lever is turned on, the air cylinder and air motor are activated and tighten the screw.
- the trigger lever is returned to the off position when screw tightening is completed, the driver bit returns to the initial position by the air cylinder, the next screw is fed into the nose of the air impact driver by the screw feed mechanism, and the screw tightening work continues. You can do it.
- the driver bit returns to the initial position, and when the trigger lever is pulled again, the driver bit advances and rotates in the nose at high speed. Therefore, the tip of the driver bit cannot be engaged with the recess of the screw to be re-tightened, and the driver bit breaks the recess of the screw. Therefore, the air impact driver used for the screw tightening operation cannot be re-tightened, and the re-tightening must be performed using a separate manual driver or the like. Disclosure of the invention
- a technical problem to be solved arises in order to provide an air impact driver capable of re-tightening in addition to a normal screw tightening function.
- the purpose is to solve.
- the present invention proposes to achieve the above-mentioned object, in which a slidable contact nose is attached to a nose of an air impact driver, and a contact valve which is operated to be switched by a slide motion of a contact nose is provided.
- a pneumatic logic circuit for controlling an air cylinder and an air motor of an air impact driver is provided by a trigger valve operated by a trigger lever and the contact valve, and a small contact nose is pushed in, and a trigger repeller is pulled out to trigger and contact a valve.
- the air impact driver is activated, the contact valve is turned off after activation, the driver bit is stopped at the bottom dead center, and the contact noise is pushed in again and the contact valve is pushed. To restart the driver bit at the bottom dead center.
- the present invention provides an air impact driver configured so that screws already fastened can be retightened.
- FIG. 1 is a cross-sectional view illustrating an embodiment of the present invention and illustrating a standby state of an air impact driver.
- FIG. 3 is a cross-sectional view showing a state where the contact nose of the air impact driver is turned on. 02 08073
- FIG. 4 is a cross-sectional view showing a state in which the contact nose and the trigger lever of the air impact driver are turned on.
- FIG. 5 is a cross-sectional view showing a state when screw tightening of the air impact driver is completed.
- FIG. 6 is a cross-sectional view showing a state where a trigger lever of the air impact driver is turned on.
- FIG. 7 is a cross-sectional view when the contact valve is opened after the trigger lever of the air impact driver is turned on.
- 1 is an air impact driver
- 5 is a nose
- 8 is a trigger valve
- 9 is a trigger lever
- 12 is a contact nose
- 13 is an air cylinder
- 14 is a piston
- 15 is a driver bit
- 16 is a hexagon.
- Shaft 17 is an impact mechanism
- 19 is an air motor
- 22 is a rod
- 23 is a contact valve
- 33 is an air motor switching valve
- 39 is an air motor control pipe valve
- 41 is a piston control pipe valve
- 52 is a port valve.
- Fig. 1 shows the air impact driver 1, which has an air motor housing 2, a clutch housing 3, a cylinder housing 4, and a nose 5 connected in a row from above, and a housing structure with a grip 6 extending perpendicularly from the clutch housing 3 It has become.
- an air plug is attached to the end of the grip 6 like a general pneumatic tool, and an air hose is connected to the air plug to supply high-pressure air from the air compressor to the air chamber 7 in the grip 6.
- a trigger valve 8 and a trigger lever 9 are provided at the base of the grip 6, and the air impact driver 1 is started and stopped by operating the trigger lever 9 to open and close the trigger valve 8.
- a known connecting screw feeder comprising a panel offset type air cylinder 10 and a feed pawl 11 connected to its biston rod is provided on the back of the nose 5 (right in the figure).
- the connecting screw in the connecting screw magazine (not shown)
- the upper right part A in the figure is a cross-sectional view of the trigger valve 8 as viewed from the right
- the lower left part B is a cross-sectional view of the contact nose 12 of the nose 5 as viewed from the left. Is indicated by a chain line.
- the piston 14 of the air cylinder 13 built in the cylinder housing 4 has a driver bit 15 mounted on the front (lower in the figure) and a hexagonal shaft 16 mounted on the rear (upper in the figure).
- the clutch housing 3 has a built-in centrifugal impact mechanism 17, and a hexagonal hole is formed at the center of a driven rotating body 18 (hereinafter referred to as anvil) having a butterfly-shaped horizontal cross section disposed at the center.
- the hexagonal shaft 16 passes through the hexagonal hole.
- the rotor 20 of the air motor 19 disposed on the impact mechanism 17 has a center hole larger in diameter than the hexagonal shaft 16, and the upper part of the hexagonal shaft 16 enters the center hole.
- the piston 14, the driver bit 15, and the hexagonal shaft 16 rotate around the axis together with the anvil 18 of the impact mechanism 17, and can move up and down in the air cylinder 13.
- the impact operation by the air motor 19 and the impact mechanism 17 is well known, and the rotor 20 of the air motor 19 is connected to the outer rotor 21 of the impact mechanism 17, and both rotate integrally.
- a lever-type hammer 21a is swingably attached to the outer rotor 21.
- the hammer 21a rotates in the rotational direction rearward toward the center of rotation due to static inertia, and the rear corner contacts the anvil 18 as shown in FIG. 2 (b).
- FIG. 2 (c) the vehicle rides on the convex portion of the anvil 18 and is pushed outward in a direction opposite to the start. As a result, as shown in FIG.
- the contact nose 12 of FIG. 1 Fits to the outer peripheral surface of the tip of nose 5 Contact Nose 12 can slide upward relative to Nose 5.
- the contact nose 12 has a rod 22 upward is attached, the tip of the rod 22 enters the rod guide hole of the contactor preparative valve 2 3 provided in the lower portion of the cylinder housing 4 in contact with the stem 24 of Roddogai de bore ing.
- the stopper 26 provided on the nose 5 is opposed to the outer peripheral surface of the cam portion 27 of the stroke adjustment dial 25, and when the contact nose 12 is slid upward, the outer peripheral surface of the cam portion 27 comes into contact with the stopper 26 to make contact. Tonoise 12 stops. As described above, since the radius of the cam portion 27 that hits the stopper 26 differs depending on the rotation angle of the stroke adjustment dial 25, the stroke of the contact nose 12 can be slid upward by rotating the stroke adjustment dial 25 to an arbitrary click position. It can be adjusted in eight steps, which allows you to adjust the screw tightening depth.
- FIG. 1 shows a standby state, in which the stem 30 of the trigger valve 8 is lowered to the closed position by the panel, and the port 31 coaxial with the stem 30 is raised by the panel and the air pressure acting on the lower surface.
- the air motor switching valve 33 is connected to the intake port 32 of the air motor 19, the input port 34 of the air motor switching valve 33 is connected to the upper output port 35 of the trigger valve 8, and the upper pipe port 36 is connected to section A.
- the upper output port 37 of the trigger valve 8 shown is connected to the lower pilot port 38, and the lower pilot port 38 is connected to the air motor control pilot valve 39.
- the upper port 43 of the air cylinder 13 and the front port 44 of the spring-offset air cylinder 10 of the connecting screw feeder are connected to the lower port 45 of the piston valve 41 for controlling the piston.
- the lower port 46 is connected to a lower port 47 of the trigger valve 8 shown in part A.
- the lower port 48 of the contact valve 23 arranged at the lower part of the cylinder housing 4 is connected to the upper port 49 of the piston control pilot valve 41, and the upper port 50 of the contact valve 23 is connected to the air chamber shown in section A. Connected to connection port 51.
- a lower port 48 of the contact valve 23 and a small port valve 52 disposed adjacent to the contact valve 23 communicate with each other through a gap on the outer periphery of the contact valve 23, and the poppet valve 52 is connected to an air motor control pipe. Open / close the passage 54 leading to the upper port 53 of the cut valve 39. As shown in FIG.
- Fig. 3 shows a state in which the contact nose 12 is pressed against the surface to be screwed in, and the spool of the contact valve 23 is pushed up by the rod 22 of the contact nose 12, so that the upper port 50 and the lower port 48 communicate with each other.
- the pressurized air is supplied to the air chamber of the piston control pilot valve 41 through the lower port 48, and the spool rises to shut off the upper port 49 and the lower port 45.
- the pressurized air pushes up the port of the port valve 52 through the passage on the outer periphery of the contact valve 23, and the pressurized air is supplied to the air chamber of the pilot motor control valve 39 through the passage 54.
- the spool has been raised to keep the upper port 53 and the lower port 55 shut off.
- pressurized air is supplied to the input port 34 of the air motor switching valve 33 through the upper port 35 of the trigger valve 8, and the upper pilot port 36 of the air motor switching valve 33 and the pilot port 40 of the pilot valve 39 for air motor control.
- a pipe pressure is applied to the piston port 42 of the piston control piston valve 41.
- the spool of the air motor switching valve 33, the spool of the air motor control pilot valve 39, and the spool of the piston control pilot valve 41 are lowered, and the lower port 48 of the contact valve 23 at the bottom of the cylinder housing 4
- the pressurized air is supplied to the upper air chamber of the air cylinder 13 through the piston control pilot valve 41, and the biston 14, the driver bit 15 and the hexagon shaft 16 start descending.
- pressure air is supplied to the lower port port 38 of the air motor switching valve 33 through the lower port 55 of the air motor control pilot valve 39, the spool 57 of the air motor switching valve 33 rises, and after the piston 14 descends, the air motor 19 starts.
- the piston 14, the driver bit 15 and the hexagonal shaft 16 start rotating.
- the air motor IS is started, the anvil 18, the hexagonal shaft 16, the piston 14, and the dry pad bit 15 are rotated by the high-speed impact operation of the impact mechanism 17, and the screw is fastened to the object to be screwed.
- FIG. 5 shows a state in which the screw is completely tightened.
- the bumper 57 in the air cylinder 13 and the bottom port valve 52 are pushed down.
- the port valve 52 is lowered, the pressure air supplied from the air motor control pilot valve 39 to the lower air chamber of the air motor switching valve 33 is released from the port valve 52 and the lower port of the air cylinder. It is discharged from the trigger valve 8 through 46.
- the air pressure acting on the lower surface of the spool 56 of the air motor switching valve 33 decreases, the spool 56 descends, the input port 32 of the air motor 19 and the air chamber 7 are cut off, and the air motor 19 stops rotating.
- trigger lever 9 Turn on only trigger lever 9 from the initial state shown in 1.
- the trigger valve 8 when the trigger valve 8 is turned on, the upper port ports 36 , 40 of the air motor switching valve 33, the air motor control pipe valve 39, and the biston control pipe valve 41, respectively. , 42
- the pilot pressure is applied to 2 and the spools of the pilot valve 39 for air motor control and the pilot valve 41 for piston control are lowered to the open position.
- the contact valve 23 since the contact valve 23 is in the initial state, the compressed air is not supplied to the piston control pilot valve 41, and the air cylinder 13 remains stopped. Also, since the compressed air is not supplied from the air motor control pilot valve 39 to the lower pilot port 38 of the air motor switching valve 33, the spool 56 of the air motor switching valve 33 is caused by the pilot pressure applied to the upper pilot port 36. The air motor 19 does not start because it descends and shuts off the input port 32 of the air motor 19 and the air chamber 7.
- the contact nose 12 is pressed against the floor or the like, and is pushed in.
- the spout of the contact valve 23 is pushed up by the opening 22 of the contact nose 12, and the upper port 50 is opened.
- the lower port 48 communicates, and pressurized air is supplied from the lower port 48 to the piston control pilot valve 41 and the air motor control pilot valve 39 to lower the piston 14.
- the piston 14 pushes down the bumper 57 in the air cylinder 13 and the bottom port valve 52, and the port valve 52 descends.
- the pressure supply to the piston control valve 41 and the air motor control valve 39 is cut off, and the piston 14 stops at the bottom dead center.
- the contact nose 12 is separated from the floor or the like, and the tip of the driver bit 15 stopped at the bottom dead center position is engaged with the recess of the target screw head.
- the bumper 57 and the bottom port valve 52 are released from the pressure and rise, and pressure is applied to the piston valve 41 for piston control and the pilot valve 39 for the fan motor control. Air is supplied.
- the air impact driver of the present invention can perform additional tightening in addition to a normal screw tightening function, so that when a screw tightening failure occurs, it is not necessary to perform additional tightening using another driver. Work efficiency is improved.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Portable Nailing Machines And Staplers (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001-241315 | 2001-08-08 | ||
JP2001241315A JP4720042B2 (ja) | 2001-08-08 | 2001-08-08 | エアインパクトドライバ |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003013795A1 true WO2003013795A1 (fr) | 2003-02-20 |
Family
ID=19071785
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2002/008073 WO2003013795A1 (fr) | 2001-08-08 | 2002-08-07 | Tournevis a chocs pneumatique |
Country Status (3)
Country | Link |
---|---|
JP (1) | JP4720042B2 (ja) |
TW (1) | TW529981B (ja) |
WO (1) | WO2003013795A1 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4970154B2 (ja) * | 2007-06-08 | 2012-07-04 | 株式会社マキタ | ねじ打ち込み機 |
JP5585840B2 (ja) * | 2010-12-16 | 2014-09-10 | 日立工機株式会社 | ねじ締機 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS421157B1 (ja) * | 1963-12-03 | 1967-01-20 | ||
JPS5333478A (en) * | 1976-09-10 | 1978-03-29 | Max Co Ltd | Drive screw fitting tool |
EP0774325A2 (en) * | 1995-11-20 | 1997-05-21 | Max Co., Ltd. | Screw driving and turning machine |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000317855A (ja) * | 1999-05-07 | 2000-11-21 | Ryobi Ltd | 油圧式インパクト工具 |
JP3560870B2 (ja) * | 1999-10-04 | 2004-09-02 | 株式会社マキタ | ねじ締め機 |
-
2001
- 2001-08-08 JP JP2001241315A patent/JP4720042B2/ja not_active Expired - Lifetime
-
2002
- 2002-08-07 WO PCT/JP2002/008073 patent/WO2003013795A1/ja active Application Filing
- 2002-08-08 TW TW91118029A patent/TW529981B/zh not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS421157B1 (ja) * | 1963-12-03 | 1967-01-20 | ||
JPS5333478A (en) * | 1976-09-10 | 1978-03-29 | Max Co Ltd | Drive screw fitting tool |
EP0774325A2 (en) * | 1995-11-20 | 1997-05-21 | Max Co., Ltd. | Screw driving and turning machine |
Also Published As
Publication number | Publication date |
---|---|
TW529981B (en) | 2003-05-01 |
JP4720042B2 (ja) | 2011-07-13 |
JP2003048173A (ja) | 2003-02-18 |
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