TW541406B - Valve mechanism of compressed air driven impact tool - Google Patents

Abstract

The present invention discloses a valve mechanism of a compressed air driven impact tool, wherein a valve housing (131) is formed in a hollow grip part, and a main valve (132), a pilot valve (133) and a trigger stem (134) received in the valve housing (131), the pilot valve (133) supplying compressed air to a valve chamber (137) disposed on the inner peripheral side of the main valve (132), the trigger stem (134) received in the pilot valve (133) and cutting out the supply of compressed air to the valve chamber (137), the main valve (132) and the pilot valve (133) being disposed so that the lower ends thereof face the valve chamber (137) and the bottom dead center position of the main valve (132) being set at the bottom face of the valve chamber (137).

Description

541406 V. Description of the invention (1) < Technical Field > The present invention relates to a tool. A compressed air-driven impact tool for impacting a piston is used. An air-driven impact tool < Background technology > In the previous main valve mechanism of nailing gas, the type is. The upper cylinder-shaped gas in the form of ejector valve is introduced into the striker cylinder through the circle. The ejector valve is placed on the upper part of the striker cylinder and on the base of the clamper at the upper end of the nailing machine. Complicated and costly compressed air press nailing machine, the above is here, starting from the previous type of valve machine that is driven by the blown air to compress the air movement and slide freely against the cylinder structure. Special valve mechanism. The main machine of the previous nailing machine uses the structure of the tangible mechanism known by the general public to the cylinder. The mechanism is used to separate from the edge to move the circle or return the mechanism to nail the machine. The small amount of movement between the movements also increases the size of the nailing machine, which forms the needle valve driven by the main valve and the movement of the needle in the striking cylinder η 搫, so that the tool drives the compression ^ Yes, the compression of the present invention = the valve mechanism It is explained that the system which is compressed into a cylinder in the application of this application is 'made in a clamp part and moved', and the air cylinder is made to recover. In order to make the full height of the top valve larger, the air used for making it. In particular, the compact, lightweight, compact, and lightweight top-valve valve that is placed on the upper end of the air supply line of the air in the gripper section will hold the compressed air gas in the control of the cylinder's trigger valve to accommodate it in a sliding configuration. Finally, the formation of a prominent need to form a distribution channel, so it constitutes a quantified obstacle for the purpose of improving use. Internal trigger valve

C: \ 2D-CODE \ 91-l] \ 93120270.ptd Page 5 541406 ---------- V. Description of the invention (2) —_____, the main valve mechanism near, as such a main valve It is known that the trigger valve and the main valve are arranged in parallel with the main valve, and the main valve is arranged above the trigger valve coaxially in the front-rear direction of the machine. The structure that forms the air passage between the two types of valves arranged in parallel is the largest, and is used to communicate with each other. The valves are arranged coaxially in the vertical direction; = ,. In addition, two types of ′ are arranged to increase the size of the contact ^: direction for starting the nailing machine. Even if the valves are made compact, they are difficult to be accommodated in the clamp section and cannot be fully ensured to increase the pressure of the pressure medium # =, to increase the stroke of the main valve;: Surface: first = machine output Force: The main valve mechanism of the air introduced in the cylinder is the previous principle, and the upper end of the trigger lever of the J ff valve is compressed * 5. It is used to start the main valve as high pressure compressed air. ^ ^ Lice pressure, so it is used, it acts on the upper end of the trigger lever: in the case of the machine, it is often repeated. Zuo Zhenxiang Da Gu _ $ ρ ^ Manually know to touch more advance ... Jin. "The question of operational harm is to have the top contact structure :::] :: front: the sequence triggering mechanism of the top start of the prominent configuration = the order of making-will make Niu Chunli use the aforementioned top contact structure ^, When the trigger is equipped, the sequence lever 2f sequence lever operation touch < disclosure of the invention > after the dynamic load becomes larger, the problem of starting the method. 〇 Lifangfang turned the present invention to provide ^ With,-inter-species organizations (main inter-organizations —— __ can be used with

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π 上 " + UO V. Description of the invention (3) Angle + In addition to the above-mentioned prior art, ensure that the compressed air ° 螭 point, in the central clamp section it W VA n W ^ the oxygen cross-sectional area of the hole is 纟 1 Inside can be filled with two ::::. : The nail machine can be small ::: Contained, pipeline structure Trigger mechanism: Dance :: 5: Trigger defense occurs larger :: Action: Make use of the problem. Attacking tool (eg C ::; = As mentioned above, the mechanism (actuating valve mechanism) can solve the above problem :: "Operating speed is two-hearted to make the engine ㈣, 々 疋-疋, can make the action of the strike 2 Speed makes the problem. Stability of driving this source, as the second lesson, the present invention is to provide a plug without the power of hitting the piston, the problem point, and further, create a mechanism (starting valve mechanism) as a bad impact tool In order to solve the above-mentioned prior art, the valve used in the nailing machine 'contains: box, nail structure :: case of the invention to the mechanism' is to sequentially supply the nails in the box to the shape two = plug and hit the cylinder The main body is a vacant part of the body formed by storing compressed air forming the air chamber: the cylinder is introduced to start the aforementioned driving device; before; n

IS Page 7C: \ 2D-roDE \ 91-ll \ 91120270.ptd i 541406 V. Description of the invention (4) In the clamp part, a valve sheath divided into a valve chamber at the lower end is received in the valve sheath. A main valve, a pilot valve, and a trigger lever are arranged. The main valve is used to open and close the inside of the striking cylinder and the air chamber; the pilot valve is arranged on the inner peripheral side of the main valve, and is directed toward the inside through the hollow. Supply of compressed air in the valve chamber; the trigger rod is freely slidingly accommodated in the hollow of the pilot valve, and opens or blocks the compressed air in the valve chamber to the atmosphere; further, the main valve and the pilot valve are The lower end portion is disposed facing the valve chamber, and is set so that the bottom dead center position of the main valve comes into contact with the bottom surface of the valve chamber. In addition, it is preferable that the hollow of the pilot valve is communicated with the atmosphere, so that the compressed air does not act on the upper end surface of the trigger lever accommodated in the pilot valve. Further, in a nailing machine including: a box, a nail supplying mechanism, a driving device, a main body, and a triggering mechanism, the box is used to receive the connecting nails that connect a plurality of nails; the nail supplying mechanism is a sequence of nails in the box. The driving device is driven by compressed air to drive a screwdriver, and the driving device is formed by a striking piston and a striking cylinder that use the screwdriver to drive the nail in the shooting outlet from the shooting outlet; It is used for accommodating the driving device, and at the same time integrally forming a clamp part for storing compressed air to form a hollow space in the air chamber; the trigger mechanism can be manually operated to introduce the compressed air in the aforementioned air chamber toward the striking cylinder for the aforementioned drive The device is activated; in the hollow clamp portion of the body, a valve sheath is formed in the lower end area as a valve chamber, and a main valve and a trigger lever are accommodated and disposed in the valve sheath. The main valve is used to open and close the striking circle. Between the cylinder and the air chamber, at the same time, the compressed air is supplied to the valve chamber through the hollow chamber; the trigger lever is free to slide.

C: \ 2D-CODE \ 9Ml \ 91 120270.ptd page 8… Explanation of the invention… It falls on the above-mentioned interruption, puts it down, tfa is less, forming the lower π shirt of the aforementioned main valve π% 々, the hollow part η & lt The position of the bottom dead point of the main π of the air and the wide-area configuration of the valve palace, and even pigs; as described above, although the nailing machine can be used. Paragraph, but the present invention can be applied to the general pressure to solve the difficulty of the second milk drive impact workers ... ,, will be the valve chamber > A Wa _ 0 when the cover to the front gi, 値 two gas pair large, ten [ The supply of L & fine milk of the main valve; more about the lower part of the upper part of the main valve, the lower part of the main valve, and the gas in the hollow of the lower Shao hollow through "Wen Er Bu Er Biao β 6" In order to solve the above-mentioned second problem, Koji et al. ≪ Valve mechanism (starting valve mechanism) & Moon pressure knowingly air-driven cylinder and the striking piston in the striking cylinder and] J: Stored in the striking The pressure of the compressed air in the valve chamber is opened; the air chamber of fine air is actuated by the main valve to make the second of the air chamber ^ = the compressed air driven by the striking piston between the air chamber and the striking cylinder. $ 2 Rolling is supplied to the above-mentioned striking cylinder c, and the trigger lever makes the aforementioned force 'characterized by setting a shape of 0 /'. The trigger lever is provided with a first 0 ^ 1 connection between the air chamber and the row of V ;, the Shujian ventricle heart: 0-shaped ring, in the process of non-operation between Shujian and air chamber: between, to; at the same time borrowing The second step is to configure the compression office a with a 20-shaped ring to open the manual operation of the first 0 open = _τ before opening. When the second milk is used, the second 0-shaped ring is blocked. Feeding the valve chamber into the valve chamber + opening the valve chamber and the exhaust port dynamic impact mechanism 2 solved the third problem mentioned above, the valve mechanism (starting the valve machine of this rabbit's compressed air drive, has a storage and storage in the 541406 _ V. Explanation of the invention (6) The cylinder + the inside of the cylinder and switch the air chamber between the cylinder and the cylinder and the air chamber of the compressed air, and the trigger lever can be manually operated to face the valve chamber configuration According to the air pressure, control the compression of the above-mentioned compartment between the actuated position and the non-actuated position by a in the compartment. 蕤: = Pressure, so that the main valve actuates the compressed air in the aforementioned air chamber to supply 9 to the acting position. The valve drives the compressed air driven by the piston to strike the inside of the cylinder, so that the strike becomes hollow, and at the same time, an intermediary: is formed, which is characterized in that the main valve: the main valve ; [丨 Slide is arranged in the hollow of the pilot valve In the inside, the burr plugs the air supply and interruption arranged in the chamber in a sliding concentric shape. @ ♦ Make the aforementioned ^ = sender to make the bottom dead center position toward the valve movement direction, and the valve top touches the valve. The sheath setting slide is in contact with the top of the guide valve, and when the main valve is actuated, the main valve will be moved toward the bottom dead center position. The following description is based on the implementation of the figure. The month of the invention _ The nailing machine u0 of the embodiment of the present invention. The body is formed with a main valve mechanism and is equipped with a striking cylinder 113. It is used in combination with the bottom of the "U2" sleeve U2 A free-sliding driving mechanism is housed in the nail. The piston 116 is constituted by a lifting piston 115 under the sheath 112, and the aforementioned actuator 114 can be used for the nail shooting outlet of the nozzle 116. month,? Lead to the majority formed in the connection of the nozzle portion W: The rear of the cutting tip portion 116 is engaged with and accommodates less each other < the front end of the nail storage case 11 7, and the German 4 r system is supported on the rear end of the aforementioned sweet magazine 11 17 Pliers. … The rear end of 1. Disposed in the nail storage £ 117 C: \ 2D-mDE \ 9Mi \ 9i12〇27〇ptd Page 10% ^ 41406 V. Description of invention (7) The push rod Π 8 is pressed and loaded into the nail storage by spring force] The root nail, the last of the nail supplied toward the nail ejection outlet of the aforementioned nozzle unit U 6 = hits the upper part of the cylinder ⑴, is arranged on the inside of the cylinder cover 119 to form two "19 coverings": The α ^ brake 12 is at the top dead center position to prevent the inner peripheral surface of the aforementioned striking piston sleeve U2 and the outer peripheral surface of the striking cylinder 113 from soil: 濩: dynamic = piston U5 is introduced into the striking cylinder 113 & amp Shrinking to uo, Bu Lu Jie is connected to the main machine described later through the gas passage 121: then: Λ said gas passage 121 is connected to the main valve mechanism 130 through the aforementioned main valve mechanism: connected to the row of cocks arranged in the clamp section ]? ^, The connected "^ The pin M3 of the women's clothing is formed at the rear end of the hollow clamp portion lu, or the second part is the air chamber 12 for the compressed air supplied by the compressed air source: the second part: 1" The trigger used to start the operation of the nailing machine = food: structure m, when the operator triggers the manual operation: 26 and the nailing machine 11 to push into the nailed material, the medium can rotate to support = 刼 Zuoding The contact member 127 and the sequence lever 128 on the trigger lever 126 are formed. The top member 127 protrudingly arranged in the tip direction of the nozzle portion 116 that hits TU0, causes the top contact arm 129 formed on the upper end of the contact member 127 to rotate the sequence lever. 128, and then start the operation sequence lever by operating the trigger lever 126—as described in detail in FIG. 2, the main valve mechanism 1 30 is composed of the air chamber 12 ′ in the clamp portion 11} and is accommodated in a communication cylinder connected to the striking cylinder. It consists of the main valve 132, the pilot valve 133, and the trigger lever 134 in the valve sheath 131 between the gas passages i2i. The valve sheath 1 3 1 is formed with a small diameter part in the upper part and a large diameter in the lower part. Page 11C : \ 2D-CODE \ 91-ll \ 91120270.ptd 541406 V. Description of the invention (8) The air valve is formed on the shoulder of the two diameter parts 〖3 丨 &, in the shape of the lower large diameter = the exhaust corpse seat 1 3 1 b, the upper part of the air supply seat j 3 workers a is connected to the air chamber, + Λ touches the milk wide seat 131 The a and the exhaust valve seat 1 3 1 b are connected to the front gas passage 122. Further, the lower side of the exhaust wide seat uib is connected to the exhaust passage 1 2 2 above. "9 在 可 二I slide inside the main valve 1 31 and form a hollow main valve q'9. The woman wears a first O-ring 132a and a second O-ring 132b, and the first O-shaped ii ^ m is an away party. ; The gas valve seat 1 3 1 a switch is continuous to the gas passage 121㈤ of the air chamber 1 2 4 disc mi3; the second O-ring 1232b is connected to the exhaust valve seat 1 3 1 b. The inner diameter of the striking cylinder 丨 3 and the exhaust path 2 2: 2 form an enlarged diameter portion 132 below the main valve 132. , The enlarged diameter section. It is guided around the lower large-diameter portion 131b of the reading cover 131 by the sliding top contact. The lower end of the main valve ij fixed valve 132 is partitioned into a valve chamber 137 by the valve 盍 136 mounted on the lower # of the valve sheath 131. Ϊ: Gongzhiyin 'valve 1 3 3 is housed inside the main valve 1 3 2 freely sliding !! The bow 丨 the slide ring at the lower end of the pilot valve 133 is guided to the receiving tomb pii q The inner peripheral surface of the enlarged diameter portion 132c at the lower portion of the valve 132. The lower end of the valve 3 'is the same as the main valve 132 described above. It is facing the valve chamber 137. The bottom center portion of the valve cover 136 is formed into a cylindrical shape ^, sa extending upward, and at the cylindrical portion 1 36a The bottom of the opening is formed so that the valve chamber 137 inside; the opening of the atmosphere 36b. The above-mentioned trigger lever 134 is equipped with a first 0-meter, a second 0-ring 134b and a third 0-ring 134c. The first 10 liters / W4a is arranged in the cylindrical portion 137 and communicates with the shut-off valve chamber. 1 ^ 7

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1 TV7U V. Description of the invention (9) Inside and the aforementioned opening l36b; The hollow inside of the second O-shaped pilot valve 133 is blocked forward ^ b, which is introduced by the aforementioned; the third 0-ring 134c, which is connected to The lower end of the trigger lever 134 can be operated by the aforementioned trigger mechanism hollowed below the pilot valve 133. Said :; 4 openings are protruded and configured to make holes 133a 1 the upper part of the pilot valve 133 ^ The upper end of the guide 133 1 3 The upper hole is often connected to the atmosphere: 'the formation of the valve jacket air chamber 1 24 Compressed air, the clearance between the main surface and the inner peripheral surface of the main valve 132 丨 the outer periphery of the pilot valve 133 ^^^^^, the opening of the valve 1 3 3 1 3 3 h When the compressed air is introduced into the aforementioned valve chamber 137: moving !! Second, 33 interacts with the lower end face of the main valve 132, so that the two valves face upward t2]: When the compressed air in ΐ137 is exhausted, the guide room 133 borrows The compressed air is moved to the top of the large diameter portion 133c of the outer periphery of the ΐ part, and the main valve 132 is also moved downward by the compressed air acting on the upper diameter portion 133c of the lower enlarged portion 133c. The first O-ring 132a is moved downward by the main reader 132, and the .5 air valve seat 丨 3 1 a leaves, and the compressed air in the air chamber 丨 24 is supplied to the striking cylinder 113 through the air passage 121. At this time, the second ring 132b of the main valve 132 blocks the gas passage 12m and the exhaust passage 122. At the upper end of the trigger lever 134, a compression spring 138 disposed in the pilot valve 133 acts to give the trigger lever 134 the potential energy that always faces downward. In addition, the lower end of the main chamber 132 is provided with a compression spring 139 disposed in the valve chamber 137, so that the main valve 132 is always blocked upward, that is, the air chamber 124 and the striking circle.

541406 V. Description of the invention (ίο) Potential energy in the positions within the cylinder 1 1 3. 3 (a) to 3 (d). The above-mentioned solid wire core > (Figure 3U) is a non-operating state. Within 137 of the compressed air: =, the lower end receives the compressed air pressure 4 to the upper position. In this way, the main chamber 132 of the main valve 132 is blocked by the air chamber ma ′ from the air chamber 124 and the gas passage; the second 21 seat; The passage m is due to the second O-ring 132b and the exhaust valve seat u2b. The inside of the cylinder is in communication with the atmosphere. Knife off 'so hit as shown in Figure 3 (b), the operation is used to activate the second 0-ring 134b of the nail trigger lever 134 enters the private ^ 34 and hangs after 1 q? In 133, the valve facing towards the valve Η is cut off from the doorway "hole wide air, the first 0-ring 13" is separated from the cylindrical portion 1363, and the compressed air in the valve chamber 137 is discharged by opening Ml36b. With this, i / displacement: I: press the gas on the main valve 132 and the pilot valve 133 upwards ^ move upwards with compressed air to the bottom ^ move downwards by the main valve 132, the main valve U2 The 0-shaped ring 132a t leaves the f valve seat 1313, so that the air chamber 124 communicates with the gas passage 121, and the air lice are introduced into the striking cylinder to drive the striking piston. By moving the guide valve i 33 to the bottom, the fitting depth of the second O-ring 134b of the trigger lever 134 becomes larger, and even if the compressed air is slightly restored, it cannot lead into the valve chamber 137, and the main valve 1 The action of 3 2 is stable, and the nailing action can be surely performed. 0 After the nail is inserted and the trigger mechanism is opened, as shown in FIG. 3 (d), the upper end of the cup 1 3 j is compressed by the ash. The force of the spring worker 3 8 moves downward, and the younger 0-shaped beetle 1 3 4 a is engaged with the cylindrical portion 3 6 a to lock the opening 1 3 6 b. and

C: \ 2D-CODE \ 9Ml \ 9112027O.ptd Page 14 m 54! 4〇6 Description of the invention (11) J 'When the trigger lever 134 has moved to near the bottom dead center, the = guide valve 133 is disengaged' and the dust The pressure of the compressed air introduced into the inner chamber 137 of the compressed air introduction chamber 137 is increased, and it is used as a guide for increasing the pressing force at the lower end of the valve 132, and the two valves are directed upward to the initial state of 3 (a). As a result, the striking cylinder is connected to the pneumatic channel 1 to 22, and the compression medium of the striking piston is driven to break and discharge, t. Alas, the maternal milk is discharged from the exhaust passage 12 through the gas passage 121, and the striking piston is returned to the striking process. Set the position to the top dead center. Figures 4 (a) to 4 (d) are about the second embodiment of the improved technology of the above embodiment: Example 'the embodiment of the previous f', although the pilot valve 133 is free sliding-shell, ' However, the upper end of the pilot valve 133 'in the present embodiment is housed in the recess 111 & 1 and the lower end is pressed against the upper end of the cylindrical portion 1368 of the cover m. In the second, the trigger lever 134 was pulled back immediately and the situation was finally restored, and finally the main valve was actuated by mistake. In the second embodiment shown in FIG. 4 (a) to FIG. 4 (d), the guide valve 33 is fixed to the lower position, and the compression of the compressed gas toward the compartment η? Is blocked. To prevent the malfunction of the main valve. Fig. 2 illustrates the operation state of the second embodiment described above. Figure 4 (a) shows the compressed air pressure inside the main valve j 3 2 ^ chamber 124 and the gas passage 121, and the gas path is blocked at one side, so that the striking cylinder and the air passage 121 are closed. After the first operation of contacting the exhaust path 122 to activate the trigger lever 134 of the nailing machine, the ―0-ring 134b enters the guide valve 133, and blocks the facing valve.

) 41406 V. Description of the invention (12) In room 137, r ~, 1 3 6a M > constricted air, and then the first 0-ring 1 34a is formed by the cylindrical portion, such as & 4 (opening 1 3 6b discharges the compressed air in the valve chamber 1 3 7. Loss, as shown in the second, because the gas pressure of the main valve 132 is pushed upwards. By the main valve η / ″: t ::: The role of compressed air Move to the bottom to drive the piston. Move downwards, and the compressed air is introduced into the striking cylinder rod 134. As a trigger mechanism, as shown in Figure 4 (d), the touch trigger M ^ n36a The internal locking opening l36b. When the valve 133 is moved to the vicinity of the bottom dead center, the second O-ring 134b is introduced into the valve chamber 137 by the constricted air in the guide. When the pressure tracer is large, the main 'second-upper' is used to push the lower end of the main room m. With this, the striking cylinder is driven by the disk air chamber 2: f, Fig. 4 (the initial state of 0, the piston Compressed air: disconnected from the exhaust path 122, row :: the hiccup is restored to the top dead center position to complete the striking process. Main; two or two diagrams of the third embodiment of the invention. In this embodiment Read money structure 1 4 0, in the description of the pipe pair; point |, valve 132 valve and pilot valve 133 are different, the main valve 141 with the main body 141 constitutes the main large diameter part, which is free V °, within the diameter part and the lower part, keep the first move at the upper end of the large diameter part; ^ accommodating between the coffee ^ sleeve 1 3 1 of the gas supply valve seat 1 3 1 a, switching oxygen ^^ 承 肖Formed at the lower end of the main shaft of the valve 面临 inside the two gates = the gas moves upward. The compressed air in the internal valve to 137

V. Description of the invention (13) The central part of the main valve 1 4 1 is formed in the upper end of the trigger lever 134-the upper end surface of the mounting part is arranged in the middle work to form a connection ^ & The large-diameter gas milk of the main valve 141 and the hollow space 141, 0 below the Yu-shaped ring 134C, and the compressed air in the air chamber 1 24 are supplied to the valve chamber 137 through the air i #. The palate stencil passage is closed in the hollow of the main chamber. It is cut off. 32: The ring 1 3. The upper end of the small diameter part of the wide opening 1 forms an opening 141d, and the main valve 141 is hollow through the opening at the upper end. The inner casing and the flash casing are described in accordance with FIG. 5 for the operation state of the third embodiment. 6 holes. Fig. 6 (a) is the first 0-ring 13 of the non-chamber rm rod 134, which is closed_chamber m, between

The compressed air plant in the end receiving valve chamber 坚 is firmly moved to: Fang Zhu: 1 2 Between the J-pass 通 室 air chambers 124, direct the gas passage 121 toward the exhaust path 122 ::. Touch: As shown, after operating the trigger lever 134 to activate the nailing machine, the second 0-ring 134 bit of ^ 34 enters the hollow space of the main room 141, and is supplied to the valve chamber 137 through the rolling limb passage 141c. As for the compressed air, the ring 134a is separated from the cylindrical portion 1363, and the dust in the opening U6b is discharged. Thereby, as shown in FIG. 6 (c), the main valve% is moved from the upper child f to the lower side by the action of squeezing air. With the main valve 1 4 1 facing downward ^, the first O-ring 141a of the main valve 141 is separated from the gas supply valve seat Ula, so that the lice 124 and the gas passage 121 are communicated, and the compressed air is struck against the piston. By moving the main valve W to the bottom, the fitting depth of the 裱 -shaped mounting 1 34b of the trigger lever 134 and the hollow portion of the main valve 141 becomes larger, and the trigger 4 cannot be introduced into the valve chamber even if the compressed air is slightly restored.

C: \ 2D-C0DH \ 91-n \ 91120270.ptd Page 17 541406 V. Description of the invention ~ ----- ~------ Wide 1 4 1 meeting The nail action is carried out reliably. After touching the nail produced by the nail and opening the trigger mechanism 125, as shown in FIG. 6 (d), the second stem “5” is moved to the lower side by the force of the waste shrink spring 138, and ^ 1 3 4 a It fits inside the cylindrical part 1 3 6 a and closes the opening 1 3 6 b. When the main two trigger lever 134 has moved near the bottom dead center, the lower end of the hollow part of the second 0-ring 13 讣 5 ^ 4 1 is disengaged. Compressed air through the gas passage 1 4 1 c ^ ^ ¥ ^ Inside the valve chamber 137. The pressure " force 1 4 1 " of the compressed air introduced into the valve chamber 137 is acting on the lower end of the main valve 1 4 1 When the pushing pressure becomes large, the main valve π, / pan 々 ^ moves back to the initial state of Fig. 6 (a). With this, the blow circle 1, air to 1 2 4 interrupts the communication with the exhaust path 1 2 2 The problem of driving the piston is contracted, the gas is discharged from the exhaust path 122 through the gas passage 121, and the blow is returned to the top dead center to complete the blow process. 土 之 ί ί η: About the fourth embodiment of the present invention The starter valve mechanism is compared with other examples of the opening and closing valve mechanism, and the description will be given. German in Γ compressed air driven impact tools such as compressed air driven nailing to hit the piston freely It is housed in the striking cylinder dynamically. In order to acknowledge = work energy to drive the nailing machine in the striking cylinder, it is formed by touching the bamboo shoots: the trigger valve and the main / stem operated by the trigger valve ^ The valve lion, as shown in the example of Fig. 7, is formed from :; the suction of the second main groove 232 in the hollow main chamber 231 inside the valve sheath 231, the O-ring inhalation of the valve sleeve 231 The valve seat 234 is disconnected, and the gas chamber 2 is closed. 23, and the exhaust gas O-ring 23 7 is connected to the exhaust gas. ::: Off, the switch strikes the inside of the cylinder 236 and the exhaust port 239. In the valve sheath 231 The lower end of the enlarged diameter of the main valve 232 is formed in the valve chamber 240 below.

541406 V. Description of the invention (15) The main valve 232 in the valve chamber 24 0 is the area of the end under the pressure of the compressed air in the valve chamber 24 0. The differential pressure switch in the area of the upper end portion operates. In the center part of the Lishu valve sheath 231, a trigger (24) operated by a trigger lever 241 that can be manually operated is provided, and eight buckles are knitted. ^ The aforementioned main valve 232 operates. When the exhaust gas is touched, the 20-ring 244, the first 0-ring 243 and the first piece π y y clothes 243 are opened and closed in the valve chamber 240 and rolled to 32. Mysterious 0-ring 244, which is the switch trigger lever 241 and operates the trigger lever 242. The pressure of the compressed air ηΛ / ^ ^ 1 measures 24 ° = Γ, ^ Λ Γ Γ 43 blocks the reading room. Let ’s assume that the second 0-ring 244 opens the valve chamber 240 to the atmosphere through the pick port 245. Produced by Mushrooms) 丨 From the exhaustion of compressed air inside the "Li :; two block off 24 ° toward the aforementioned wide room, eight after the '赭 release the compressed air in the valve chamber 2 4 0 to the atmosphere, making the main valve 2 3 2 Open the action. However, the aforementioned trigger lever 241 is formed by the operator's speed due to the operator's various types of long-term operation. The trigger speed of the trigger lever 242 is various. "Wonder: There are different situations. S The aforementioned -0-shaped ring 243 blocking pressure: the second one, Zhu Xi one ^ shape, 244 by changing the inside of the valve chamber 240 and the exhaust port 245 Second: π bucket two 'compressed air from the valve chamber 240 The speed of the release to the atmosphere ^ Shiguo / action of the main reading 232 will eventually become different. "、、、 口 果’ gas to the compressed air in 2 3 5 and the rapid production in the blow cylinder 236, sigh, you ca n’t get a uniform nailing force.

C: \ 2D-CODE \ 9M] \ 9ll2〇27〇.ptd Page 19 Following V1 see 541406, invention description (16) Description: The fourth embodiment of the present invention is to provide-a kind of can solve the above point, ... By changing the trigger lever of the manually operated trigger mechanism == degree, the driving energy of the striking piston can also be stabilized, and the starting valve mechanism with a slightly constant main and operating speed is the subject. = To show the implementation of the starter of the fourth embodiment of the present invention, the player ′ is equipped with a striking cylinder 202 in a hollow sheath 201, and a screwdriver 2103 is used below. The striking piston 204 is freely slid and accommodated in the striking cylinder 202. The upper part of the above-mentioned striking cylinder 200 is covered with a cylindrical cover 205 forming a part of the sheath 201, and a rubber-made striking piston brake 206 disposed inside the cylindrical cover 205 is placed in The top dead center position F stops the attack of the living base 2 04. Between the inner peripheral surface of the sheath 2 01 and the outer peripheral surface of the striking cylinder 2, a flow path 2 7 for driving the striking piston 2 04 into the compressed air introduced into the striking cylinder 2 0 2 is formed. The flow path 207 is connected to a start valve 2 1 0 described later via a gas passage 208. The inside of the hollow clamp portion 2 10 integrally formed with the sheath 2 01 forms an air chamber 2 09 for storing compressed air supplied from a compressed air source. The starter valve 2 1 0 is composed of a main valve 2 1 2 and a trigger valve 2 1 3. The main valve 2 1 2 'is to connect the above-mentioned striking cylinder 2 〇2 to the air chamber 2 0 9 and the exhaust gas. Circuit 2 08; the trigger valve 2 1 3 is manually operated in order to make the main valve 2 1 2 actuate. As shown in detail in FIG. 9, the hollow main valve 2 1 2 is slidably housed in a valve sheath 2 1 4 formed at the base of the aforementioned clamp portion 2 1 1 a. The ring 217 and the exhaust O-ring 218 are connected to the air-supply valve seat 215 formed in the valve sheath 214, and the switch is continued in the air chamber 209 and the striking cylinder 002. 2 0 8 gas passages; the exhaust 0-ring

C: \ 2D-CODE \ 9Ml \ 91120270.ptd Page 20 541406 V. Description of the invention (17) One ~ --- 2; 8, it is connected with the exhaust valve seat 216 switch to strike the cylinder 2002 and exhaust An enlarged diameter portion 212a is formed in the lower portion of the main valve 212 between the two passages, and the enlarged diameter portion 21 is guided through the sliding ring 2 1 9 to contact the peripheral surface of the valve sheath 2 丨 4. A valve chamber 22 () is defined in the lower portion of the valve sheath 214, and the enlarged diameter portion 2 of the aforementioned main valve 212 faces the valve chamber 220. The trigger valve 2 1 3 is composed of a pilot valve 2 2 1 and a trigger rod 2 2 2. The pilot valve 2 2 1 is arranged concentrically inside the main valve 2 丨 2 to form a hollow; the trigger rod 2 2 2. It is arranged in the hollow of the pilot valve 2 2 i so as to slide freely. The pilot valve 2 2 1 is housed in the inner peripheral surface of the main valve 2 1 2 and is slidably guided. The lower end surface of the pilot valve 221 faces the valve chamber similarly to the main valve 212 described above. The main valve 2 1 2 and the pilot valve 2 2 1 face the valve chamber 2 2 0, and the compressed air pressure acting in the valve chamber 220 at the lower end portion moves toward the upper dead center position. By reducing the pressure of the compressed air in the valve chamber 2 20, the main valve 2 12 and the pilot valve 2 2 1 are moved to the bottom dead center by the compressed air in the independently acting air chamber 2 09. A cylindrical portion 2 2 3 extending upward is formed at the bottom center portion of the valve sheath 2 1 4, and a row connecting the inside of the valve chamber 220 to the atmosphere is formed at a bottom portion inside the cylindrical portion 2 2 3. Gas port 225. A first 0-ring 22 6, a second 0-ring 227, and a third 0-ring 228 are mounted on the trigger lever 222. The first 0-ring 22 6 is inserted into the hollow of the pilot valve 221. Compressed air flows into or blocks the valve chamber 220 from the air chamber 209 through the hollow interior of the pilot valve 221; the second O-ring 22 7 is arranged in the cylindrical portion 223, The inside of the valve chamber 220 is connected to the exhaust port 225. The third 0-ring 228 is often arranged in the hollow of the pilot valve 221, and the lower end of the trigger rod 222 is connected to

C: \ 2D-CODE \ 91-ll \ 91120270.ptd Page 21 541406 V. Description of the invention (18) ^ The aforementioned exhaust port 225 is prominently arranged below ′ can be operated by manual operation trigger = 229. A hole 222a is formed at the upper end of the aforementioned pilot valve 221, ::: the hole at the t end of the valve sheath 214, and the hollow inner region of the upper part of the hollow of the pilot valve 221 is divided into an upper mountain ^ in the aforementioned trigger lever 222 The second o-ring m is “blocked from the inside of the valve chamber 22 and the exhaust port” in the cylindrical portion 223, and the second o-ring 226 is maintained to be opened by the pilot valve 22f. In this state, through the hollow inside of the pilot valve 221, the air chamber 2 of the air chamber 209 is provided 22 to the valve-f20 :. As shown in detail in FIG. 10, the operation triggers: 百 刖 述 弟 —0 shape ^ 227 is separated from the cylindrical portion 2 23, 225 after the valve chamber 22 0 is connected to the atmosphere &# ^ batter, so that the first. Epithelium = fitted in the hollow of the guide 221. Although the compressed air within = to 220 is released from the exhaust port 2 25 until the compressed air from the air chamber 209 is still delayed, the compressed air pressure from the air chamber 209 is still reduced, so that the main air pressure decreases. Valve: The valve 221 is maintained at the top dead center position. The operation of the above embodiment will be described with reference to BΠ 1 (a) to FIG. As shown in FIG. A, the second 0-ring 227 of the 222 at the initial stage of the trigger mechanism 2 2 9 is fitted into the cylindrical portion 2 2 3, and thereby the lockout = capability 2 2 0 and the exhaust port 2 2 5 rooms. The _q-shaped ring 2 2 6 is separated from the hollow portion of the pilot valve 2 2 1 disposed in the upper dead center, and the compression in the air chamber 209 is supplied to the valve chamber 220. Therefore, the compressed air in the valve chamber 22 is maintained;

C: \ 2D-CODE \ 9l-ll \ 91120270.ptd Page 22 541406 V. Description of the invention (19) The high-pressure main valve 2 1 2 is arranged in the upper boundary to hit the cylinder 2.2. The dead point position interrupts the operation of the air chamber 20 9 and the borrow trigger mechanism 229. After the trigger lever 2 22 is operated upward, as shown in FIG. 11 (b), the second O-ring 227 is formed by the aforementioned cylindrical chamber 2 2 0 is connected to the exhaust port 2 25, and the state treasure 99n ★ The state where the wide air port 225 is leaking. From this time to the 2 ', the compressed air is formed by the guardian 10-ring 226 that has not yet been fitted into the hollow inside of the pilot valve 221, so that the pressure is supplied to the WV 220. As a result, it will not bow down from the oxygen chamber 209 toward the valve chamber, so that the main valves 212 and 4 2 to 2 will shrink into a step, and the trigger lever 222 will be broken 2 // At the top dead center, the first 0-shaped ring 226 is fitted into the bow. The guide gate 991 Μ Shiban Sll (c), the description of the compressed air toward the valve chamber 22 0: Dagger: 'Block off the air chamber 20 9 is greatly divided by the cylindrical portion m:,: 2 :: The second 0-shaped ring 227 has a larger opening area, and the rooms 2 2:: 225 and the valve room 22 The factory digs the valve to 0. The inside of the wishing place is entered into the gas port 225 — the gas is released, as shown in Figure 11 (d). The main room 212 is quickly moved to the m position. The compressed air is introduced into the impact cylinder to drive the impact living base 204. In this way, the fall of the trigger rod m, the -0 ring 226 interrupts the supply of air to the valve chamber 22o, because Zhayi 'opens the valve chamber 220 and the exhaust port 2 to the 2nd ring m. By setting the lever and operating the speed, the compression in the wide room 220 can be performed rapidly, and the main valve 212 can be actuated. Under the daytime force of K, as the pressure of the compressed air in the valve chamber 220 decreases, it moves to the bottom dead center position, so the first O-ring 226 and the guide valve ⑵

541406

541406 V. Description of the invention (21) ----- ^ Connect the air chamber 3 54 and the exhaust path 355 selected in the other-mentioned striking cylinder 3 50 to the 70% hollow main valve 3 5 6 '. Housed in a valve sheath 35 7 formed at the base of a clamp of a needle machine, an air supply O-ring and an exhaust 0 ring 3 6 0 are installed; the air supply 0 ring 3 6 0 is disconnected Between the gas supply valve seat 3 5 8 formed in the wide sheath 3 5 7, the switch is connected between the gas chamber 3 5 4 and the gas passage 3 5 9 of the striking cylinder 350; the exhaust O-ring 3 6 0 It is connected with the exhaust valve seat 361 to disconnect the switch within the cylinder 350 and the exhaust path 355. The lower end portion of the valve sheath 358 is divided into a valve chamber 3 6 3, and the lower end portion of the aforementioned main valve 3 5 6 is faced into the valve chamber 3 6 3. The trigger valve for activating the main valve 3 5 6 is composed of a pilot valve 364 and a trigger rod 3 6 5. The pilot valve 3 6 4 is arranged concentrically in the main room 3 5 6 to form a hollow. The trigger lever 3 6 5 can be slidably arranged in the hollow of the pilot valve 3 6 4. The pilot valve 3 6 4 is guided to be slidably guided in the hollow inner periphery of the main valve 3 5 6, and the lower end surface faces the valve chamber 3 6 3 like the main valve 3 5 6. The main valve 3 5 6 and the pilot valve 3 6 4 face the inside of the valve chamber 3 6 3, and the compressed air pressure in the valve chamber 3 6 3 at the lower end of the valve faces the dead center position above the inactive position. Move, by reducing the compressed air in the chamber 3 6 3, the main valve 3 5 6 and the pilot valve 3 64 are moved by the compressed air in the air chamber 3 54 on the upper side to the dead point position below the operating position. . A first 0-ring 3 6 6 and a second 0-ring 3 6 9 are mounted on the trigger lever 3 65. The first 0-ring 3 6 6 is inserted into the hollow of the aforementioned pilot valve 3 6 4 through The guide valve 3 64 is filled with hollow air from the air chamber 3 54 into the valve chamber 3 63. The second O-ring 3 6 9 is attached to the valve sheath 357.

Which 541406 V. Description of the invention (22) 1 The cylindrical part 367 communicates with each other. The shut-off valve chamber 3 63 is connected to the aforementioned exhaust port. As shown in FIG. 14 (a), before the trigger lever 36 5 is operated, the second The O-ring fell into the tubular portion 3 67, and the first O-ring 366 was guided by the hollow portion of the valve =. As a result, the compressed air from the air chamber 354 is introduced into the chamber 363, the pressure of the gas is hunted, and the pilot valve 364 and the main valve 356 are actuated toward the non-actuated position.图 As shown in Figure 1 and ^ (13), operate the trigger lever 35 2 and the first 0 shape of the trigger lever 3 6 5 ^ by hH in the hollow of the guide room 364 'Tongri Temple borrowed the second 0 ring 369 = 由 以The cylindrical portion 3 67 of the sleeve 357 is operated at a position away from the valve to block the inflow of the compressor into the valve chamber 3 63 and at the same time, connect the inside of the valve chamber 3 63 to the exhaust port δ. Otherwise, the valve chamber 3 6 3 The internal pressure decreases, and the main valve 356 moves to the lower operating position by the pressure of the compressed air acting from above, interrupting the blow 350 and the exhaust path 355, and at the same time it communicates with the air chamber 354, so that the constricted air is introduced into the blow circle. The barrel 350 drives the striking piston 351. The earth pilot valve 364 also disappeared due to the pressure in the valve chamber 3 63, and moved to the bottom dead center by the diameter difference. As a result, the embedding strategy of the aforementioned first O-ring 366 and the pilot valve 364 became larger, and the lever 3 was triggered. 6 5 The ON state is maintained between the ON position and the 0FF bit below. The setting of the distance 上述 above is based on the impact of driving the nailing machine, #reaction and the impact when the nail is driven, etc., even if the trigger lever 3 6 5 is restless, hunting, The main valve 365 can reliably maintain the ::: position, and fully supply compressed air to the striking piston 351, so that it can be reliably actuated at the _ 1 position, and more fully make the compressed air return to the dead τ ^ 351. For storage in the room, in order to be sure at the top dead center, hit the piston 351 to recover. ‘Set aside

C: \ 2D-C0DE \ 9Ml \ 91120270.ptd Page 26 541406 V. Description of the invention (23) However, 引导 'pilot valve 3 6 4' is shown in Figure 12 and Figure 13 and is contained in the valve chamber 3 An enlarged diameter portion 37 is formed at the inner and lower ends of 63, and a large number of radial communication guide valves 3 64 are formed in the enlarged diameter portion 3 70. A slit 3 71 is formed on the outer peripheral side and the hollow inner side. Shape of full power. For this reason, when the main valve 3 5 6 is actuated in the direction of the bottom dead center, the main valve 3 5 6 is arranged so as not to conflict with the pilot valve 364, and in a state where the two are actuated at the bottom dead center position, the main valve 356 and the pilot A gap s is formed between the valves 364 (see FIG. 14 (1)). : And 'the pilot valve 364 failed to fill in order to form a hollow cylinder ::; Used: The pilot reading 3 64 acts on the diameter difference area of compressed air pressure action in the direction of the bottom dead center, especially the flat gold sliding resistance It becomes larger, as shown in Fig. 14 (C). In this way, _4 has the size of the non-actuated position h becomes smaller, # nailing machine; ^ After the 0N position and 0FF position of the trigger rod 365 are slightly lowered finally, compress the Λ ^ reaction, etc., and trigger the rod 3 The result of 6 5 occurred lastly. The reading of 3 56 rose and was introduced into compartment 363, and the power was supplied by compressed air. 5: The fruit could not be fully stored in the return chamber by the impact piston method, so that & compression finally occurred. Poor return of air non-point position. In addition, the J piston bracket 1 cannot be restored to the top dead position. In the fifth practical problem of the present invention, the pilot valve 3 6 4 is reliable. In order to provide a solution to the above-mentioned occurrence of the insufficient power of the piston 3 5 1 It is a problem that the dead center is operated so that the mechanism is not activated. Figure 15 shows the use of a compressed air-driven shock-sensitive valve as a start valve for the fifth embodiment of the present invention, and a "J t nailer" as an example of a tool for carrying out the present invention. in

C: \ 2D-C0DE \ 91-ll \ 91120270.ptd 541406

Inside the sheath 301, a striking cylinder 300 is arranged, and the striking piston 300 is combined with the striking piston 300 below the screwdriver 3303, and is slidably accommodated in the striking cylinder 302. The upper part of the aforementioned striking cylinder 30 2 is covered with a cylindrical cover forming three sheaths, and is made of rubber ^ placed on the inner side of the cylindrical cover 3 05, and the base brake 3 06 is at the top dead center position. Stop the aforementioned hitting piston 3⑽. Between the peripheral surface of the sheath 301 and the outer peripheral surface of the striking cylinder 302, the striking piston is driven to introduce compressed air into the flow path M,? In the striking cylinder 302. The flow path 307 is connected to a later-mentioned start-up valve machine 310 via a gas passage 30 8. The inner portion of the clamp portion 301 & which forms a hollow body with the sheath 301 is a shape that holds compressed air supplied from a compressed air source 3. / Machine to V. Description of the invention (24) The starting valve mechanism 3 1 0 is composed of the main valve 3 丨 2 and the trigger valve 3 丨 4, and the main valve 312 is selected from the above-mentioned striking cylinder 302. The trigger valve "^" is connected to the air chamber and the exhaust path 31 i formed in the clamp portion 30a; the trigger valve "^" is operated by manually operating the trigger lever 3 2 3 '. 16 =, the hollow main valve 312 is slidably accommodated in the valve sheath 315 formed at the base of the above-mentioned clamp portion 3013, and an air-ring 317 and an exhaust-ring 319 are installed. The gas-feeding O-ring 317 is connected away from the gas-supplying valve seat 31 6 formed in the valve sheath 31 5 and continues in the gas chamber 309; hitting 3 () 8 gas passages in the cylinder 302 The exhaust ring 319 connects the valve seat 318 to the inside of the switch striking cylinder 3202 and the exhaust path 311. An enlarged diameter portion 312a is formed at the lower portion of the main F valve 312, and the enlarged diameter portion 312a The sliding surface 32 0 slides against the peripheral surface of the valve sheath 315 and is guided by sliding. The lower part of the valve sheath 3 3 5 is divided into a valve chamber 32 1, and the main valve 3 1 2 has an enlarged diameter portion 3 1. 2a

541406

V. Description of the invention (25) The valve chamber 3 2 1 faces below

The trigger valve 3 1 4 is composed of a pilot valve 3 2 2 and a trigger lever 3 2 3. The pilot valve 3 2 2 is concentrically arranged inside the main valve 3 丨 2 to form a hollow. · The trigger lever 3 2 3 is arranged in a hollow position of the pilot valve 3 2 2 so as to be freely slidable. The pilot valve 3 2 2 is guided on the inner peripheral surface of the main valve 3 1 2 so as to slide freely. The lower end surface faces the inside of the valve chamber 3 2 1 like the main valve 3 丨 2 described above. The main valve 312 and the pilot valve 32 2 described above face into the valve chamber 321, and the compressed air pressure acting in the valve chamber 3 2 1 at the lower end moves toward the dead center position above the inactive position. By reducing the pressure of the compressed air in the valve chamber 3 2 1, the main valve 3 丨 2 and the pilot valve 3 2 2 operate by the pressure of the compressed air in the respective air chamber 3 09 toward the dead center position below the operating position.

A cylindrical portion 3 2 4 extending upward is formed at a bottom center portion of the valve sheath 3 1 5, and a row connecting the inside of the valve chamber 321 to the atmosphere is formed at a bottom portion inside the cylindrical portion 3 2 4. Gas port 325. A first 0-ring 326, a second O-ring 327, and a third O-ring 328 are mounted on the trigger lever 323. The first O-ring 326 'is inserted into the hollow of the pilot valve 322 through The hollow inside of the pilot valve 3 ^ 22 flows into or blocks the compressed working gas from the air chamber 309 to the inside of the valve chamber "I. The second O-ring 3 2 7 is arranged in the cylindrical portion 3 2 4 The third o-ring 328 is connected to the inside of the valve chamber 321 and the aforementioned exhaust port 325. The third o-ring 328 is arranged in the hollow of the pilot valve 3 22; the lower end of the trigger lever 323 is broken by the exhaust gas described above. The port 3 2 5 is protruded and arranged below, and by manual operation of the trigger, 313 can operate / form a hole "", ':: shape: a hole in the upper end of the valve sleeve 3 1 5 The hollow inside of the pilot valve 3 2 2 is connected to the atmosphere. The third O-ring 328 is a pilot valve.

541406

V. Description of the invention (26) The hollow inner area of 3 2 2 is divided into upper and lower parts. As shown in FIG. 16 and FIG. 17, an enlarged # portion 3 2 9 is formed at the lower end portion of the guide 32 2, and an upwardly facing shoulder portion 33 0 is formed at the upper end of the enlarged diameter portion 32 9. 33 ° is in contact with the lower and inner surfaces of the enlarged diameter portion 312 & facing the main valve. A plurality of openings 331 are formed in the circumferential direction of the guide valve 3 2 2 to communicate with the outside of the guide valve 3 22 in the circumferential direction. In the second position, the guide valve 322 is in a downward dead point state, and the upper end surface of the cylindrical portion 324 formed in the valve set 315 abuts against the upper dead end position of the set bow 丨 guide 322. On the one hand, the main valve 3 works 2 by setting the upper surface facing the lower side of the enlarged diameter portion 3 1 2 a and the shoulder 33 0 of the guide rod μ operating at the position of the bottom dead point mentioned above to make the setting bottom dead. Point location. The operation of the above embodiment will be described with reference to FIGS. 19 (a) to 19 (d). As shown in FIG. 19 (a), in the initial state when the trigger lever 3 1 3 is not operated, the second O-ring 327 of the trigger lever 323 is fitted into the cylindrical portion 3 24, thereby locking ^ = 321 and Exhaust port 32 5 rooms. The first O-ring 32 6 is separated from the hollow portion of the upper guide 阙 322 arranged to compress the air chamber 309 in the direction of the air chamber 321 and supply it to the chamber 321. The compressed air in the valve chamber 321 is maintained. Compared with the same pressure, the main valve 3 1 2 is arranged in a non-actuated position to block the air 9 ^ and hit the cylinder 302. For the operation of Zhili 9 and fine trigger / dry 313, after the trigger lever 323 is operated upward, as shown in FIG. 19 (b), the second O-ring 327 of the trigger lever 323 is opened by the aforementioned cylindrical portion 324. The valve chamber 321 is connected to the exhaust port 325, and the compressed air in the valve chamber 321 is in a state of leaking from the exhaust port 325. Furthermore, the 0-ring 326 of the trigger lever 323 is fitted into the hollow of the pilot valve 322 to block the air chamber 309.

541406 V. Description of the invention (27) M3 port compressed air. As a result, the compressed air in the valve chamber 321 is discharged through the discharge port 3 25 and the pressure in the valve chamber 321 drops sharply. After the pressure in the valve chamber 321 drops, as shown in FIG. 19 (c 312 ^! Γ on the top of the ## compressed air in the air chamber 309, the air supply ring 317 of the main reading 312 is quickly borrowed *, air supply The compressed air of the valve seat 316 ::: 3 ΓΛ is driven toward the striking cylinder: = 04. At this time, even if the sliding resistance of the guide valve 322 is increased, the diameter of the enlarged portion 32 9 of the guide room 322 is tm / The top contact is determined by the position of the main valve 312 at the bottom dead center, i.e., a large diameter difference that can be sufficient, so the V valve 3 2 2 is actuated at the dead center below the active position. The above-mentioned pilot valve 322 is When the main valve 312 is actuated, although the main 2 is ί: two Vi Cheng Λ guide 322 of the lower end of the expansion section 32 9 above the ^ 3 3 0 plus impact, but because of the expansion valve of the pilot valve 322 The m-former communicates with the openings inside and outside, so it can expand the diameter compared to the person who formed the crack! 332〇? ^ ^ 31 2 T! 3 2 9 4 Section 3 3 0, the guide valve 322 will not be damaged after removal. As shown in FIG. 19 (d), even if the situation where the trigger lever 322 returns from the ON position to the lower direction is unstable, it is determined by the reaction of the piston 304 during the operation. The pilot valve 322 is arranged at the bottom dead center position, so the fitting depth of the -0 ring 326 of the trigger lever 323 and the hollow portion of the guide ring 322 becomes larger. Even if the cylindrical portion 324 of the sheath 315 is returned to the position where the valve chamber 321 and the exhaust port 325 are blocked, the first

541406

The corpse 0 ring 3 2 6 can also be fitted into the hollow of the guide ring 3 2 2. Since the shielding state between ^ to 3 0 9 and the valve chamber 3 2 1 is maintained, compressed air will not be supplied. Within the valve to 3 2 1, the main valve 3 1 2 will not be operated unsteadily. The taxi again “opens the trigger lever 3 1 3, and when the trigger lever 3 2 3 returns to the non-operation position ^ 'Because of the first 0-ring 3 2 6 of the trigger lever 3 2 3, the hollow ^ of the pilot valve 3 2 2 is lowered to In the disengaged position, the compressed air passes through the middle of the pilot valve 322 and is supplied from the air chamber 3 09 to the valve chamber 321. By the pressure of the compressed air supplied to the valve chamber 321, the main valve 3 丨 2 The pilot valve 3 2 2 returns to the non-actuated position to form an initial state. In addition, the present invention is not limited to the above-mentioned embodiments, and various changes can be made within the technical scope of the present invention. Of course, the present invention is also applicable to those of them. This application is based on the Japanese patent applicant (Japanese Patent Application Nos. 200 1 -27240 1) filed on September 7, 2001, and the Japanese Patent Monthly Application (Japanese Patent Application No. 200, filed on November 22, 2001). 1-358394), and the application date of June 14, 002, T application (special application 2002-1 74986), whose content is incorporated here as a profit-seeking test. 0 < Industrial availability > According to the present invention, since the main valve, the bow, the pilot valve and the trigger lever are arranged in a concentric shape, the dimensions in the rear direction and the dimensions in the height direction::. In addition, 'the main valve is caused by the sliding o-ring?' The movable structure can be omitted. The outer diameter of the main valve and the pilot valve and the main valve that touches the outer periphery will not be large even if it is fixed to the main reading and connecting two. Towards: Nail

541406 V. Description of the invention (29) The configuration in the clamp part of the machine. = In addition, since the bottom dead center position of the main valve is set to touch the lower bottom surface of the valve chamber rod at the lower end of the sheath, the setting of = can be made larger, even if it is arranged in the clamp section] Eight = 1 makes the area where the air flows in, which does not reduce the wheel output of the nailing machine by 20%: compression is maintained. Furthermore, due to the action of the pilot valve-, two, f, can protect the 0-ring of the 0-ring of the trigger lever that can supply compressed air in a small room ^: ', the operation of the trigger lever is incomplete by blocking the valve. State, the main valve is 22 'so it is $ 3; even after the trigger lever returns slightly after the operation :: position. ^ In order to keep the action in a consistent manner, in addition, the hollow inside of the pilot valve or the main valve is often communicated at the upper end of the trigger lever so that the compressed air pressure and lice do not act on the trigger lever due to the increase of the compressed air pressure. The manual operation of the pressure trigger lever used can be gently entered = it will not become larger and will not impair workability. In addition, when triggering; the sequence touch on '==' can also prevent the sequence lever from turning into a sequence lever and turning it '. You can also use this sequence touch = ability to start the nailing machine. It can be further confirmed that according to the present invention, when the trigger lever is manually configured with two O-rings, the second O-ring is opened to the valve chamber before the first O-ring interrupts the process of the palace. The compressed air in the compressed air valve chamber to which the toilet is discharged is discharged through the $ 20 ring, so the compressed air from the air chamber can be supplied in the valve chamber, which can suppress the anti-knock state. Ask the child about the pressure in the room

C: \ 2D-CODE \ 9Ml \ 91120270.ptd Page 33 541406 V. Description of the invention (30) Operation of the main valve for reducing the air pressure. Furthermore, when the operating trigger lever interrupts the supply of compressed air to the valve chamber by the first O-ring, the opening area between the valve chamber and the exhaust port has been formed by the second O-ring, so it can be instantaneous. The discharge of the compressed air in the valve chamber can be performed quickly regardless of the operating speed of the trigger lever, and the main valve can be operated stably. Further, according to the present invention, the pilot valve is made to come into top contact with the main valve. Since the pilot valve is forcibly actuated to the bottom dead center position by the main valve, the case where the pilot valve cannot obtain a large diameter difference is different from that in When working in cold places, even if the sliding resistance increases, such as the poor operation of the pilot valve, the main valve can be used to reliably move the pilot valve to the bottom dead center position. This can make the trigger lever the first The fitting depth of the 0-ring and the pilot valve is maintained at a predetermined set value. Even if the unstable operation of the trigger lever is used, the main valve can be operated stably, so that the compressed air is sufficiently supplied to the striking piston, and it can also prevent Poor return of the blow piston occurred. < Explanation of the component number> 110 Nailer 111 Clamp section 112 Sheath 113 Strike cylinder 114 Actuator 115 Stroke piston 116 Nozzle piston 117 Nail magazine

C: \ 2D-CODE \ 9 卜 11 \ 91120270.ptd Page 34 541406

C: \ 2D-CODE \ 9Ml \ 91120270.ptd Page 35 541406 V. Description of the invention (32) 134 Trigger lever 134a First 0-ring 134b Second 0-ring 134c Third 0-ring 136 Valve cover 136a Tubular Portion 136b Opening 137 Valve chamber 138 Compression spring 139 Compression spring 140 Main valve mechanism 141 Main valve 141a First 0-ring 141c Gas passage 141d Opening 201 Sheath 202 Impact cylinder 203 Transmission 204 Impact piston 205 Cylinder cover 206 Impact piston Brake 207 Flow path 208 Gas passage 209 Air chamber

C: \ 2D-CODE \ 9Ml \ 91120270.ptd Page 36 541406 V. Description of the invention (33) 210 Start valve mechanism 211 Main valve 212 Main valve 213 Trigger valve 214 Valve sheath 215 Air supply valve seat 216 Exhaust valve seat 217 Air 0 ring 218 Air 0 ring 219 Slip ring 220 Valve chamber 221 Pilot valve 222 Trigger lever 223 Tube 225 Exhaust port 226 First 0 ring 227 Second 0 ring 228 Third 0 ring 229 Trigger mechanism 231 Valve sheath 232 Main valve 233 Intake 0 ring 234 Intake valve seat 235 Air chamber

C: \ 2D-CODE \ 91-ll \ 91120270.ptd Page 37 541406 V. Description of the invention (34) 236 Percussion cylinder 237 Exhaust 0 ring 238 Exhaust valve seat 239 Exhaust port 240 Valve chamber 241 Trigger valve 242 Trigger lever 243 First 0-ring 244 Second 0-ring 245 Exhaust port 246 Strike piston 301 Sheath 302 Strike cylinder 303 Transmission 304 Strike piston 305 Cylinder cover 306 Piston brake 307 Flow path 308 Gas passage 309 Gas Chamber 310 Start valve mechanism 311 Exhaust path 312 Main valve 312a Expanded portion

C: \ 2D-CODE \ 9Ml \ 91120270.ptd Page 38 541406 V. Description of the invention (35) 313 Trigger lever 314 Trigger valve 315 Valve jacket 316 Air valve seat 317 Air 0 ring 318 Exhaust valve seat 319 Exhaust O-ring 320 Slip ring 321 Valve chamber 3 22 Pilot valve 32 3 Trigger lever 3 24 Tubular section 32 5 Exhaust port 32 6 First 0-ring 3 2 7 Second 0-ring 328 Third 0-ring 32 9 Expansion part 3 3 0 Shoulder 331 Opening 35 0 Hit cylinder 351 Hit piston 3 5 2 Trigger lever 35 3 Start valve mechanism 354 Air chamber

C: \ 2D-C0DE \ 91-ll \ 91120270.ptd Page 39 541406 V. Description of the invention (36) 355 Exhaust circuit 356 Main valve 357 Valve sheath 358 Air valve seat 359 Gas passage 360 Air 0 ring 361 Exhaust valve seat 362 Exhaust O-ring 363 Valve chamber 364 Pilot valve 365 Main valve 366 First O-ring 367 Tubular portion 368 Exhaust port 369 Second O-ring 370 Expansion portion 371 Slit

C: \ 2D-C0DE \ 91-ll \ 91120270.ptd page 40 541406 The diagram briefly says September :. "A. For example, the figure is constructed. &Amp; The main mechanism of the embodiment which is the same as that of Fig. 1 is a cross section Q, ^ a) to Fig. 3 (d). η 3U) is the action state of the initial γ example, shown in Figure 3 (c); the state of the trigger lever (the second one just after the trigger lever 2 is shown. The state, Figure 3) is shown in Figure 4 ( (M to FIG. MS) is the display 1 state, and FIG. 4 (c) is the display): it shows the state immediately after the trigger lever is opened: the state of the nailing machine, FIG. 4 图. Others, Examples Partial cross-sectional view of the nailing machine 6 (昀 to FIG. 6 (d) are the display diagrams, and a is the initial state of the display, and the operating state of /, the state of the diagram 'Fig. 6 (c) is the display is started Various states of energy just after the trigger lever is opened immediately after the triggering. 'State' Fig. 6 (d) is a cross-section showing the structure of the == the starting and driving of the nailing machine. The cross section of the-part of the nailing machine is widely enlarged with the same section of the nailing machine ... Figure 10 is a detailed enlarged section of the trigger lever of the same pairing machine as in FIG. 8- ---- Page 41 541406 Simple diagram Figure U (a) through Figure 11 (f) are II ^ ^ / ® 1 μ ^ ^ ^ ^ " J ® ® ', and Figure U (d) shows the valve-breaking chamber and air chamber. Time 1 1 (e) shows the state of triggering the two nailing machines after starting, the icon has just returned to the state of the trigger lever > * sub, Fig. 11 (f) is the display shown in Fig. 12-"eye empty The state after rolling. Top view. An example of the structure of the opening and closing valve mechanism of Ding Ming Ding Machine = to show the trigger lever of the starting valve mechanism-examples a to 14 (c) show the operation of the starting valve mechanism Fig. 14 (a) is an example of the action of the display t. The trigger lever is operated toward the ON position. Figure 14 (b) shows the trigger lever is slightly restored after the start: :: machine status (C) is a cross-sectional view showing the-part of the nailing machine of the starter and mechanism implementing the present invention. 17 is a perspective view of the trigger lever. Fig. 18 is a cross-sectional view showing the actuating mechanism At Fig. 19U) to Fig. 9 (1's start-up mechanism ϋ). In front view, Fig. 19 (a) is Xianzhu = Γ start valve Fine position operation of the lever in the operating state of the mechanism Figure 19 (:) v :) shows the status of the nail machine. (D) shows the status of triggering a slight recovery after the display is activated. ^ ----- Page 42 c: \ 2D-〇 〇de \ 91-J1 \ 9] 120270.ptd 541406

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Claims (1)

541406 VI. Scope of patent application 1. A valve mechanism of a compressed air-driven impact tool, comprising: an air chamber for storing compressed air; a striking cylinder; a valve sheath; a valve chamber divided by the aforementioned valve sheath area; a main The valve is actuated by the pressure of the compressed air in the valve chamber to open and close the air chamber and the striking cylinder. The pilot valve is formed to be hollow and is disposed on the inner peripheral side of the main valve. Supply of compressed air; and a trigger lever, which is slidably housed in the hollow portion of the pilot valve, opens or blocks the compressed air of the valve chamber from the atmosphere, and blocks the supply of compressed air to the valve chamber; Supplying compressed air in the air chamber to the striking cylinder, and driving the striking piston contained in the striking cylinder; wherein the lower ends of the main valve and the pilot valve are arranged to face the valve chamber, The bottom dead center position of the main valve is set by pressing against the bottom surface of the valve chamber. 2. A valve mechanism of a compressed air-driven impact tool, in which the hollow portion of the pilot valve is constantly connected to the atmosphere, so that the compressed air is not used as the upper end surface of the trigger lever contained in the pilot valve. 3. — A valve mechanism of a compressed air-driven impact tool, including: an air chamber for storing compressed air; a striking cylinder; a valve sheath; C: \ 2D-C0DE \ 9Ml \ 91120270.ptd Page 44 541406 VI. Patent application scope The valve chamber is divided by the aforementioned valve sheath; the main valve forms a hollow, which is actuated by the pressure of the compressed air in the aforementioned valve chamber to make the aforementioned The switch between the air chamber and the striking cylinder is used to supply compressed air to the valve chamber through the hollow portion; the trigger lever is slidably received in the hollow portion of the main valve, and the compressed air of the valve chamber The atmosphere is opened or blocked, and at the same time, the supply of compressed air to the valve chamber is blocked; and a gas passage is communicated from the upper end portion of the main valve to the hollow portion at the lower portion; and the compressed air in the gas chamber is supplied to In the striking cylinder, a striking piston housed in the striking cylinder is driven; wherein the lower end of the main valve is arranged to face the valve chamber, and the main valve is set by abutting against the bottom surface of the valve chamber. Bottom dead center position. 4. A valve mechanism of a compressed air-driven impact tool, comprising: an air chamber for storing compressed air; a striking cylinder; a valve sheath; a valve chamber divided by the aforementioned valve sheath; a main valve borrowed by the aforementioned valve chamber The compressed air pressure actuates the switch between the air chamber and the striking cylinder; the trigger lever enables the valve chamber to be selectively connected between the air chamber and the exhaust port; the first 0-ring is used in the trigger lever to enable the aforementioned Between the valve chamber and the exhaust port, open during non-operation, and shut off during operation; and a second O-ring, between the valve chamber and the exhaust port, in non-operation C: \ 2D-CODE \ 91-ll \ 91120270.ptd Page 45 541406 VI. It is closed during patent application and opened during operation; In addition, the compressed air in the aforementioned air chamber is supplied into the aforementioned striking cylinder, 俾Driving the striking piston housed in the striking cylinder; wherein the first and second arrangements are arranged before the first 0-ring blocks the space between the valve chamber and the air chamber during the operation of the trigger lever; The 0-ring allows the second 0-ring to open between the valve chamber and the exhaust port. 5. —A valve mechanism of a compressed air-driven impact tool, comprising: an air chamber for storing compressed air; a striking cylinder; a valve sheath; a valve chamber divided by the aforementioned valve sheath; a main valve having a hollow portion Facing the valve chamber, the switch between the air chamber and the striking cylinder; and the trigger lever, which is arranged concentrically and can be slid in the hollow portion of the pilot valve; and according to the action of the trigger lever, constitute The compressed air pressure in the valve chamber is controlled, the main valve is actuated in the activated position and the non-actuated position by the compressed air pressure in the valve chamber, and the compressed air in the air chamber is supplied to the actuated position by the main valve actuated toward the actuated position. The striking cylinder is driven by a striking piston housed in the striking cylinder; wherein, the guide valve and the trigger lever are used to supply air to and block the valve chamber, and at the same time make the guide valve top Touch the dead center position under the valve sheath setting / determining sliding direction, and make the main valve and the pilot valve at the same time when the main valve is actuated Touch to enabling the dead center position for the next pilot valve toward the C: \ 2D-C0DE \ 91-ll \ 91120270.ptd p. 46 541406 C: \ 2D-CODE \ 91-ll \ 91120270.ptd Page 47