JP2011056648A5

JP2011056648A5 -

Info

Publication number: JP2011056648A5
Application number: JP2009212061A
Authority: JP
Filing date: 2009-09-14
Publication date: 2012-04-26
Anticipated expiration: 2029-09-14

Description

上記目的を達成するために、本発明は、圧縮空気を蓄える蓄圧室と、シリンダと、該シリンダ内に連通する戻り空気室と、該シリンダ内に往復摺動可能に設けられたピストンと、トリガと、該ピストンの上面及び該シリンダの内面より画成されるピストン上室から該蓄圧室への通路及び大気への通路を択一的に形成するメインバルブと、室内の圧力によって該メインバルブを上下動させるメインバルブ室と、該メインバルブ室より延びるメインバルブ制御通路と、該メインバルブ制御通路に接続され、該蓄圧室から該メインバルブ制御通路への流路及び該メインバルブ室から大気への流路を択一的に連通、遮断するトリガバルブとを有する打込機において、一端が該蓄圧室に接続され他端が該メインバルブ室に接続されたメインバルブ室通路と、一端が該戻り空気室に接続されたサブバルブ制御通路とが形成され、該サブバルブ制御通路の他端に一端部が配置され、他端部は該メインバルブ制御通路内に配置され、該一端部と該他端部との間の中間部が該メインバルブ室通路を遮断又は連通し、該一端部と該他端部とを結ぶ方向に移動可能なサブバルブを備え、該サブバルブの該移動により該サブバルブの該他端部は該メインバルブ制御通路を遮断可能であり、該中間部には空気流路が形成され該空気流路を介して該メインバルブ室通路を連通可能であり、該空気流路が形成されていない該中間部の周面の部分で該メインバルブ室通路を遮断可能であり、該サブバルブは、該メインバルブ制御通路を遮断されていない連通状態とし且つメインバルブ室通路を遮断する第１位置と、該メインバルブ制御通路を遮断し且つメインバルブ室通路を連通する第２位置との間で移動可能である打込機を提供している。 In order to achieve the above object, the present invention provides a pressure accumulating chamber for storing compressed air, a cylinder, a return air chamber communicating with the cylinder, a piston provided in the cylinder so as to be capable of reciprocating, a trigger, A main valve that selectively forms a passage from the piston upper chamber to the pressure accumulating chamber and a passage to the atmosphere defined by the upper surface of the piston and the inner surface of the cylinder, and the main valve by the pressure in the chamber A main valve chamber that moves up and down, a main valve control passage extending from the main valve chamber, and a flow path from the pressure accumulation chamber to the main valve control passage and from the main valve chamber to the atmosphere. of alternatively communicating path flow, the driving machine for chromatic and a trigger valve for blocking, the main valve chamber passage other end one end connected to the accumulating chamber connected to the main valve chamber And a sub-valve control passage having one end connected to the return air chamber, one end being disposed at the other end of the sub-valve control passage, the other end being disposed within the main valve control passage, An intermediate portion between the first end portion and the other end portion is provided with a sub-valve that can move in a direction connecting or blocking the main valve chamber passage and connecting the one end portion to the other end portion. the other end of the sub-valve is capable of shutting off the main valve control passage, the intermediate portion is capable communicating the main valve chamber passage through the air flow path formed air flow path, the air The main valve chamber passage can be shut off at a portion of the peripheral surface of the intermediate portion where no flow path is formed, and the sub-valve places the main valve control passage in an unblocked communication state and the main valve chamber passage is A first position to shut off; and And blocking the inlet valves controlling passage provides a driving machine is movable between a second position for communicating the main valve chamber passage.

一端が該蓄圧室に接続され他端が該メインバルブ室に接続されたメインバルブ室通路と、一端が該戻り空気室に接続されたサブバルブ制御通路とが形成され、該サブバルブ制御通路の他端に一端部が配置され、他端部は該メインバルブ制御通路内に配置され、該一端部と該他端部との間の中間部が該メインバルブ室通路を遮断又は連通し、該一端部と該他端部とを結ぶ方向に移動可能なサブバルブを備え、該サブバルブの該移動により該サブバルブの該他端部は該メインバルブ制御通路を遮断可能であり、該中間部には空気流路が形成され該空気流路を介して該メインバルブ室通路を連通可能であり、該空気流路が形成されていない該中間部の周面の部分で該メインバルブ室通路を遮断可能であり、該サブバルブは、該メインバルブ制御通路を遮断されていない連通状態とし且つメインバルブ室通路を遮断する第１位置と、該メインバルブ制御通路を遮断し且つメインバルブ室通路を連通する第２位置との間で移動可能であるため、戻り空気室内の圧力が高くなることによりサブバルブは第２位置となり、メインバルブ室内へ圧縮空気を供給し、メインバルブがピストン上室から大気への通路を形成した状態としてピストン上室と蓄圧室とを遮断することができる。このため、特開２００５−２０５５０４号公報（特許文献１）に記載されているような構成のトリガバルブを有する打込機において、トリガが引かれた後に引続きトリガが引かれた状態が維持された場合であっても、ピストン上室内への圧縮空気の供給を自動的に停止することができる。 A main valve chamber passage having one end connected to the pressure accumulation chamber and the other end connected to the main valve chamber and a sub valve control passage having one end connected to the return air chamber are formed, and the other end of the sub valve control passage is formed. One end portion is disposed in the main valve control passage, and an intermediate portion between the one end portion and the other end portion blocks or communicates with the main valve chamber passage. and comprising a sub-valve which is movable in the direction connecting the other end portion, the other end of said sub-valve by the movement of the sub-valve is capable of shutting off the main valve control passage, the air flow path in the intermediate section There through the air flow path is formed is capable communicating the main valve chamber passage is in capable of interrupting the main valve chamber passage portion of the peripheral surface of the intermediate portion of the air flow path is not formed, The sub valve is connected to the main valve control passage. Since it is movable between the first position where the main valve chamber passage is cut off and the main valve chamber passage is cut off and the second position where the main valve chamber passage is cut off and communicated with the main valve chamber passage, As the pressure in the air chamber increases, the sub-valve moves to the second position, supplies compressed air into the main valve chamber, and the main valve forms a passage from the piston upper chamber to the atmosphere. Can be blocked. For this reason, in the driving machine having the trigger valve configured as described in JP-A-2005-205504 (Patent Document 1), the state where the trigger is continuously pulled after the trigger is pulled is maintained. Even in this case, the supply of compressed air to the piston upper chamber can be automatically stopped.

該サブバルブの該中間部であって該エア周面流路よりも他端部寄りの部分にはフランジ部を有し、該サブバルブの一端部側の該フランジ部の端面の面積をＤとし、該サブバルブの他端部側の該フランジ部の端面及び該メインバルブ制御通路のトリガバルブ側からの圧縮空気の圧力を受ける該サブバルブの他端部の端面の面積をＦとし、該サブバルブにより遮断される該メインバルブ制御通路の部分の断面積をＥとしたときに、Ｄ＞Ｅの関係を有するため、蓄圧室からピストン上室に圧縮空気が流入することによりピストンが移動しピストンが元の位置に戻るまでの間に、サブバルブが第１位置と第２位置との間で往復運動してしまうことを防止することができる。また、Ｅ＋Ｆ＞Ｄの関係を有するため、トリガが開放されたときにサブバルブを第１位置へ戻すことができる。
本発明は更に、圧縮空気を蓄える蓄圧室と、シリンダと、該シリンダ内に連通する戻り空気室と、該シリンダ内に往復摺動可能に設けられたピストンと、トリガと、を有し、該トリガが操作された際に該ピストン上部と該蓄圧室とを連通させ、打込を行う打込機であって、該戻り空気室の圧力が高くなった際に該ピストン上部と該蓄圧室との連通を遮断するモードと、該戻り空気室の圧力が高くなったとしても該ピストン上部と該蓄圧室の連通を維持し、トリガの操作が解除された際に該ピストン上部と該蓄圧室との連通を遮断するモードとに切替え可能なモード切替手段を有する打込機を提供している。 The intermediate portion of the sub-valve has a flange at a portion closer to the other end than the air circumferential surface flow path, and the area of the end surface of the flange on the one-end side of the sub-valve is D, The area of the end surface of the flange portion on the other end side of the sub-valve and the end surface of the other end portion of the sub-valve that receives the pressure of compressed air from the trigger valve side of the main valve control passage is F, and is blocked by the sub-valve. Assuming that the cross-sectional area of the main valve control passage portion is E, there is a relationship of D> E. Therefore, when the compressed air flows from the pressure accumulating chamber into the piston upper chamber, the piston moves and the piston returns to its original position. It is possible to prevent the sub-valve from reciprocating between the first position and the second position before returning. Further, since the relationship of E + F> D is established, the sub valve can be returned to the first position when the trigger is released.
The present invention further includes a pressure accumulating chamber for storing compressed air, a cylinder, a return air chamber communicating with the cylinder, a piston provided in the cylinder so as to be slidable back and forth, and a trigger, When the trigger is operated, the upper part of the piston communicates with the pressure accumulating chamber to perform driving, and when the pressure of the return air chamber increases, the upper part of the piston and the pressure accumulating chamber And the communication between the piston upper portion and the pressure accumulating chamber is maintained even when the pressure of the return air chamber becomes high, and when the trigger operation is released, the piston upper portion and the pressure accumulating chamber There is provided a driving machine having mode switching means that can be switched to a mode that cuts off the communication.

Claims

A pressure accumulating chamber for storing compressed air;
A cylinder,
A return air chamber communicating with the cylinder;
A piston provided in the cylinder so as to be reciprocally slidable;
Trigger,
A main valve that alternatively forms a passage from the piston upper chamber defined by the upper surface of the piston and the inner surface of the cylinder to the pressure accumulation chamber and a passage to the atmosphere;
A main valve chamber that moves the main valve up and down by the pressure in the chamber;
A main valve control passage extending from the main valve chamber;
Hammering said connected to the main valve control passages, which have a a trigger valve for alternatively communicating, blocking the flow path from accumulating chamber to the atmosphere from the flow path and the main valve chamber to said main valve control passage In the machine
A main valve chamber passage having one end connected to the pressure accumulation chamber and the other end connected to the main valve chamber, and a sub-valve control passage having one end connected to the return air chamber;
One end is disposed at the other end of the sub valve control passage, the other end is disposed within the main valve control passage, and an intermediate portion between the one end and the other end blocks the main valve chamber passage . Or a sub valve that communicates and is movable in a direction connecting the one end and the other end;
The other end of the sub-valve by the movement of the sub-valve is capable of shutting off the main valve control passage, communicating the main valve chamber passage in the intermediate portion through the air flow path formed air flow path is possible, is capable of shutting off the main valve chamber passage portion of the peripheral surface of the intermediate portion of the air flow path is not formed,
The sub-valve has a first position in which the main valve control passage is not blocked and the main valve chamber passage is blocked, and a second position in which the main valve control passage is blocked and the main valve chamber passage is communicated. A driving machine characterized by being movable between the two.

The intermediate portion of the sub-valve has a flange at a portion closer to the other end than the air circumferential surface flow path, and the area of the end surface of the flange on the one-end side of the sub-valve is D, The area of the end surface of the flange portion on the other end side of the sub-valve and the end surface of the other end portion of the sub-valve that receives the pressure of compressed air from the trigger valve side of the main valve control passage is F, and is blocked by the sub-valve. When the sectional area of the main valve control passage is E,
E + F>D> E
The driving machine according to claim 1, wherein:

A pressure accumulating chamber for storing compressed air;
A cylinder,
A return air chamber communicating with the cylinder;
A piston provided in the cylinder so as to be reciprocally slidable;
A trigger, and when the trigger is operated, the piston upper part and the pressure accumulating chamber communicate with each other, and a driving machine that performs driving,
A mode in which communication between the piston upper portion and the pressure accumulating chamber is cut off when the pressure of the return air chamber increases, and communication between the piston upper portion and the pressure accumulating chamber is maintained even if the pressure of the return air chamber increases. A driving machine characterized in that it has mode switching means that can be switched to a mode that shuts off communication between the piston upper part and the pressure accumulating chamber when the operation of the trigger is released.