JP2009134385A - Air pressure regulator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air pressure regulator having a simple configuration, easy to miniaturize, and allowing easy setting of a secondary pressure. <P>SOLUTION: In this air pressure regulator 1, a pitch and a lead of a screw configuring a screwing part 11 between a handle member 4 and an adapter member 3 are set such that a change of the setting pressure on a secondary side is completed within a range of a relative rotation angle between the handle member 4 and the adapter member 3 of 0-360 degrees when changing the setting pressure on the secondary side. Relation between the pitch and the lead includes such the case that the pitch and the lead are equal and the case that the lead is an integer multiple of the pitch. In any case, when relatively rotating the handle member 4 and the adapter member 3, the handle member 4 and the adapter member 3 are axially relatively displaced to change a compression amount of a pressure regulating spring 26. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a pneumatic regulator for supplying compressed air to a pneumatic tool such as a nailer or impact wrench, and more particularly to a pneumatic regulator capable of appropriately changing the pneumatic pressure supplied to the pneumatic tool. It is.

Pneumatic tools not only have different air pressures depending on their types, but also take into account the types and dimensions of nails and screws loaded into the pneumatic tools, as well as the dimensions of building materials processed by the pneumatic tools, It is necessary to drive with the optimum air pressure according to the material. Therefore, a pneumatic regulator has been developed that can change the secondary pressure of the pressure reducing valve interposed between the air compressor and the pneumatic tool. For example, in Japanese Patent No. 3285591, the pressure adjustment knob is reduced in pressure by engaging a preset knob screwed into the outer periphery of the valve casing with a pressure adjustment knob screwed into the outer periphery of the valve casing. Disclosed is a pneumatic regulator that regulates the distance traveled in the direction, thereby facilitating and stabilizing the setting when switching the secondary pressure between high and low, and improving workability. In addition, as shown in FIGS. 20 and 21 of Japanese Patent Laid-Open No. 2005-316988, an index indicating the position of the pressure adjustment handle is formed on the outer peripheral surface of the housing in cooperation with the end surface of the pressure adjustment handle. Disclosed is a pressure control valve capable of setting a pressure of a fluid flowing out from a secondary side port (secondary pressure) to a desired pressure by matching an index with an end face of a pressure adjustment handle.
Japanese Patent No. 3528591 JP-A-2005-316988

  The air pressure regulator disclosed in Patent Document 1 aims at facilitating and stabilizing the setting when switching the secondary pressure to high and low two stages, and for improving workability. When switching the secondary pressure to a pressure value other than this pressure value, it is necessary to rotate the preset knob in advance to reset it to a predetermined position. Therefore, when the pneumatic regulator of Patent Document 1 is used by switching the secondary pressure to a pressure value of three or more stages, the setting work of the secondary pressure becomes complicated, and it is difficult to improve workability. .

  In the pressure control valve disclosed in Patent Document 2, the end surface of the pressure adjustment handle is made to coincide with one of the index lines drawn on the outer periphery of the housing by rotating the pressure adjustment handle. Since the secondary pressure represented by the index line is output, by forming a plurality of index lines, the secondary pressure can be switched between three or more pressure values. However, since these index lines are located relatively close to each other, for example, in a dark work site, it may be difficult to make the end face of the pressure adjustment handle coincide with one of these index lines. is there. Further, when the interval between these index lines is increased, the number of rotations of the pressure adjustment handle for matching the end face of the pressure adjustment handle with the index line also increases, so that workability when switching the secondary pressure is lowered.

  In addition to the air pressure regulator and the pressure control valve disclosed in the above-mentioned Patent Documents 1 and 2, a pressure gauge that displays the secondary pressure is installed on the outer surface of the valve housing, and the secondary pressure is confirmed while checking the secondary pressure with this pressure gauge. A pressure reducing valve for setting the next pressure has also been proposed. However, this pressure reducing valve has a complicated structure due to the presence of a pressure gauge, and is difficult to reduce in size.

  An object of the present invention is to provide a pneumatic regulator that has a simple configuration, can be easily downsized, and can easily set a secondary pressure.

  An air pressure regulator according to the present invention includes a handle member, an adapter member screwed into the handle member, and a pressure reducing valve mechanism. By rotating the handle member and the adapter member relatively, a pressure adjusting spring of the pressure reducing valve mechanism is provided. In the pneumatic regulator configured to change the set pressure on the secondary side by changing the compression amount, when the set pressure on the secondary side is changed, the relative rotation angle of the handle member and the adapter member is 0. The pitch and the lead of the screw constituting the screwing portion between the handle member and the adapter member are set so that the change of the set pressure is completed within the range of up to 360 degrees.

  Here, the pressure reducing valve mechanism means that the piston reciprocates due to the balance between the spring force of the pressure adjusting spring and the secondary pressure, so that the secondary pressure becomes equal to the set pressure on the secondary side by the pressure adjusting spring. The mechanism controlled by

  In the pneumatic regulator according to the present invention, the relationship between the pitch of the screw constituting the threaded portion between the handle member and the adapter member and the lead includes both the case where the pitch and the lead are equal and the case where the lead is an integral multiple of the pitch. . When the pitch is equal to the lead, a normal screw is formed, and when the lead is an integral multiple of the pitch, a multi-thread is formed. In any case, when the handle member and the adapter member are relatively rotated, the handle member and the adapter member are relatively displaced in the axial direction, and the compression amount of the pressure adjusting spring is changed.

  In the pneumatic regulator according to the present invention, a scale indicating a plurality of set pressures on the secondary side is marked on the outer peripheral surface of the handle member, and a reference point for aligning the scale is marked on the outer surface of the adapter member. Features.

  In the pneumatic regulator of the present invention, the handle member has a cylindrical shape as a whole, a high-pressure plug is attached to the handle member, a through hole having a central axis of the handle member as a central axis is formed in the adapter member, The pressure reducing valve mechanism includes a cylinder portion formed inside the handle member with the central axis as a central axis, a piston slidably fitted in the cylinder portion and the through hole, and a piston and the adapter member. The pressure adjusting spring interposed therebetween, a pressure chamber defined by the piston and the cylinder portion, a primary fluid passage extending from the pressure chamber to the inside of the high pressure plug, and the interior of the piston A secondary fluid passage extending from the pressure chamber to the through hole, and a valve body that opens and closes the primary fluid passage in conjunction with the piston. To.

  According to the air pressure regulator of the present invention, when the set pressure on the secondary side is changed, the change of the set pressure is completed within the range of the relative rotation angle between the handle member and the adapter member being 0 to 360 degrees. In addition, since the pitch and lead of the screw constituting the screwing portion between the handle member and the adapter member are set, it is not necessary to rotate the handle member many times in order to set the secondary pressure. That is, the pitch and lead of the screw constituting the threaded portion between the handle member and the adapter member are set so that the compression amount of the pressure adjusting spring can be sufficiently changed by the rotation of the handle member. Moreover, since the change of the set pressure on the secondary side is completed before the handle member rotates once with respect to the adapter member, the workability for setting the secondary pressure can be remarkably improved. Furthermore, since the air pressure regulator can set the secondary pressure without using a pressure gauge, the configuration is simplified and the size can be reduced.

  In the pneumatic regulator of the present invention, a scale indicating a plurality of set pressures on the secondary side may be marked on the outer peripheral surface of the handle member, and a reference point for aligning these scales may be marked on the outer surface of the adapter member. it can. Thus, by setting the reference point marked on the outer surface of the adapter member to one of the scales of the handle member, the setting of the secondary pressure is completed.For example, the secondary pressure can be applied even in a dark work site. It can be set easily.

  The handle member of the pneumatic regulator of the present invention is formed in a cylindrical shape as a whole, a high-pressure plug is attached to the handle member, a through hole having a central axis of the handle member as a central axis is formed in the adapter member, and the air pressure A regulator pressure-reducing valve mechanism includes a cylinder portion formed inside the handle member with the central axis as a central axis, a piston slidably fitted into the cylinder portion and the through hole, and the piston and the adapter. A pressure adjusting spring interposed between the members, a pressure chamber defined by the piston and the cylinder portion, a primary fluid passage extending from the pressure chamber into the high-pressure plug, and the piston A secondary fluid passage that extends from the pressure chamber to the through hole, and a valve body that opens and closes the primary fluid passage in conjunction with the piston. If configured to have, it is possible to arrange the main components of the pneumatic regulator about the central axis of the handle member. Thereby, the dimension of the transverse direction of a pneumatic regulator can be made small, and operativity can be improved.

  Other features of the present invention will become apparent from the following description of embodiments, described with reference to the drawings.

1 to 6 show a first embodiment of the pneumatic regulator of the present invention.
The pressure adjustment range of the air pressure regulator 1 is, for example, the pressure of the compressed air discharged from the adjuster member 3 when the pressure of the compressed air (primary side pressure) supplied to the high pressure plug 2 of the air pressure regulator 1 is 2.26 MPa. The (secondary pressure) can be set so that the maximum pressure is 0.82 ± 0.04 MPa and the minimum pressure is 0.48 ± 0.04 MPa.
The relief pressure of the air pressure regulator 1 is, for example, when the primary pressure is set to 2.26 MPa and the secondary pressure is set to 0.82 MPa, the secondary pressure is 1.27 MPa or less. Relieving can be set so that the secondary side pressure is 0.93 MPa or less and relief is not performed.

  A handle member 4 is interposed between the high pressure plug 2 and the adjuster member 3 of the air pressure regulator 1. The handle member 4 is formed of a cylindrical hollow body as a whole, and a cylinder portion 5 is formed inside the handle member 4 with the central axis CX of the handle member 4 as a central axis. A large diameter portion 7 of a piston 6 is slidably fitted into the cylinder portion 5, and a pressure chamber 9 is interposed between the front end surface 8 of the large diameter portion 7 on the high pressure plug 2 side and the cylinder portion 5. It is formed. Reference numeral 10 indicates a seal ring mounted on the peripheral surface of the large-diameter portion 7 of the piston 6, and the seal ring 10 is provided between the peripheral surface of the large-diameter portion 7 of the piston 6 and the cylinder portion 5 of the handle member 4. Seal slidably.

  The adapter member 3 is screwed into the hollow portion of the handle member 4. The adapter member 3 is screwed into the hollow portion of the handle member 4 via the multi-thread screw 11 with the central axis aligned with the central axis CX of the handle member 4. When the adapter member 3 and the handle member 4 are relatively rotated around the central axis CX, the adapter member 3 and the handle member 4 reciprocate in the direction in which the central axis CX extends according to the size of the lead of the multi-thread screw 11. To do. A seal ring 12 is attached to the outer peripheral surface of the adapter member 3, and the seal ring 12 is in sliding contact with a sliding portion 13 formed in a hollow portion of the handle member 4. The sliding portion 13 is defined between the stepped portion 14 and the rotation preventing member 15, and the sliding portion 13 regulates a reciprocable range of the adapter member 3 and the handle member 4. A male screw portion of the multi-thread screw 11 is formed on the outer peripheral surface of the adapter member 3, and a female screw portion of the multi-thread screw 11 is formed on the inner peripheral surface of the hollow portion of the handle member 4. The multi-thread 11 can be constituted by a double thread.

  A through hole 16 is formed in the adapter member 3 along its central axis, and a small diameter portion 17 of the piston 6 is slidably fitted into the through hole 16. A seal ring 18 is attached to the peripheral surface of the through hole 16, and the seal ring 18 is in sliding contact with the outer peripheral surface of the small diameter portion 17 of the piston 6. Reference numeral 19 indicates a male screw portion formed on the outer peripheral portion of the adapter member 3.

  A secondary side fluid passage 20 is formed inside the piston 6, and one end of the secondary side fluid passage 20 opens on the front end surface 8 of the large diameter portion 7, and the other end opens on the end surface 21 of the small diameter portion 17. The secondary fluid passage 20 allows the pressure chamber 9 to communicate with the through hole 16 of the adapter member 3. On the front end surface 8 of the large-diameter portion 7 of the piston 6, a protrusion 22 is formed that extends along the central axis CX of the handle member 4. A relief passage 23 is formed between the end surface of the protrusion 22 and the side surface of the small diameter portion 17 of the piston 6, and the relief passage 23 is connected to the outside of the handle member 4 through the atmosphere opening hole 24 formed in the handle member 4. Communicate. A washer 25 is mounted on the rear end surface 24 of the large-diameter portion 7 of the piston 6, and a pressure adjustment spring 26 formed of a compression coil spring is interposed between the washer 25 and the adapter member 3. The central axis of the pressure adjusting spring 26 also coincides with the central axis CX of the handle member 4.

  The protrusion 22 of the piston 6 extends through the pressure chamber 9 into the high-pressure plug 2 and is crimped to the valve body 27. The valve body 27 is disposed in a primary fluid passage 28 formed inside the high-pressure plug 2, and is always urged by a valve spring 29 in a direction in which the valve body 27 is seated on the valve seat 30. When the valve body 27 is seated on the valve seat 30, the pressure chamber 9 and the secondary fluid passage 20 are disconnected from the primary fluid passage 28. That is, the pressure reducing valve mechanism of the pneumatic regulator 1 is slidably fitted into the cylinder portion 5 formed inside the handle member 4 with the central axis CX as the central axis, and the through hole 16 of the cylinder portion 5 and the adapter member 3. A piston 6 to be combined, a pressure adjusting spring 26 interposed between the piston 6 and the adapter member 3, a pressure chamber 9 defined by the piston 6 and the cylinder portion 5, and the high pressure plug 2 from the pressure chamber 9. A primary fluid passage 28 extending to the inside of the piston 6, a secondary fluid passage 20 extending from the pressure chamber 9 to the through-hole 16 inside the piston 6, and opening and closing the primary fluid passage 28 in conjunction with the piston 6. And a valve spring 29 that constantly urges the valve body 27 in the direction of seating on the valve seat 30. When the piston 6 further moves in the direction of the adapter member 3 from the state in which the valve body 27 is attached to the valve seat 30, the pressure chamber 9 and the secondary fluid passage 20 communicate with the relief passage 23, and the atmosphere is released. Via the hole 24, the fluid pressure on the secondary side can be released into the atmosphere.

  On the outer peripheral surface of the handle member 4, a tape member 31 marked with scale numbers and symbols indicating a plurality of set pressures on the secondary side of the air pressure regulator 1 is fixed by means such as an adhesive. FIG. 6 shows an example of the tape member 31, and the numerical value marked on the tape member 31 indicates that the air pressure regulator 1 can change the secondary pressure in a pressure range of about 0.5 MPa to 0.8 MPa. On the other hand, a reference point 32 for aligning the scale numbers marked on the tape member 31 is formed on the outer peripheral surface of the adapter member 3. The reference point 32 is formed between the planes 33 and 34 by a laser beam or the like. The flat surfaces 33 and 34 are spanner hooking surfaces for mounting the adapter member 3 to the handle member 4. Here, it is important that the scale numbers and symbols of the tape member 31 fixed to the handle member 4 do not extend to the outer peripheral surface of the handle member 4 over one turn. When the scale numbers and symbols of the tape member 31 fixed to the handle member 4 are aligned with the reference point 32 of the adapter member 3, the setting of all the secondary pressures is completed while the handle member 4 makes one rotation (360 degrees). This is because the operability of the air pressure regulator 1 is dramatically improved by making it possible.

  Therefore, the air pressure regulator 1 is arranged such that when the handle member 4 and the adapter member 3 are relatively rotated, the handle member 4 and the adapter member 3 are relatively displaced in the central axis CX direction with sufficient leads. 4 and the adapter member 3 are screwed together via the multi-threaded screw 11 and when the set pressure on the secondary side is changed, the relative rotation angle of the handle member 4 and the adapter member 3 is in the range of 0 to 360 degrees. It is necessary to configure so that the change of the set pressure on the secondary side is completed. Further, in order to improve the operability of the air pressure regulator 1, when the handle member 4 and the adapter member 3 are screwed together via a double thread and the set pressure on the secondary side is changed, the handle member 4 and the adapter member 3 can be configured such that the change of the set pressure on the secondary side is completed within the range of the relative rotation angle 3 of 0 to 330 degrees. Thus, if the handle member 4 and the adapter member 3 are screwed together via the multi-thread screw 11, a sufficient lead can be obtained.

  However, depending on the pressure value of the secondary pressure changed by the air pressure regulator 1, the handle member 4 can be obtained by using a normal screw having an appropriate pitch and lead, instead of using the multi-thread screw 11. When the relative rotation angle of the adapter member 3 is in the range of 0 to 360 degrees, or in the range of 0 to 330 degrees, the change of the set pressure on the secondary side can be completed. For example, when the set range of the secondary pressure is in the range of 0.6 to 0.8 MPa, it is not necessary to use the multi-threaded screw 11, but a normal screw having the same pitch and lead is used, and the handle member 4 Can be configured to change the setting of the secondary pressure within a range of one rotation.

  FIGS. 7 to 9 show other modes of use of the pneumatic regulator of the present invention. This pneumatic regulator 40 has a plug 41 on the secondary side instead of the adapter member 4 of the above-described embodiment. The remaining structure of the air pressure regulator 40 is the same as that of the air pressure regulator 1. 7 to 9, the same reference numerals as those used in FIGS. 1 to 6 denote the same components. A high pressure hose 42 is connected to the high pressure plug 2 of the air pressure regulator 40, and a low pressure hose 43 is connected to the secondary side plug 41. The air pressure regulator 40 is disposed between the upper coupler 44 through which the high pressure hose 42 penetrates and the lower coupler 45 through which the low pressure hose 43 penetrates, and the upper coupler 44 and the lower coupler 45 are fitted as shown in FIGS. By doing so, these couplers 44 and 45 are accommodated inside. By covering the air pressure regulator 40 with the couplers 44 and 45, it is possible to protect the air pressure regulator 40 and prevent the air pressure regulator 40 from colliding with the product and damaging the product. When changing the set pressure of the air pressure regulator 40, as shown in FIG. 7, the couplers 44 and 45 are separated, and the air pressure regulator 40 is exposed. The set pressure of the air pressure regulator 40 is changed by matching the scale numbers and symbols of the tape member 31 fixed to the handle member 4 with the reference point 32 of the adapter member 3.

  The air pressure regulator according to the present invention can reduce the transverse dimension of the air pressure regulator and change the setting of the secondary pressure within a range in which the handle member is rotated once. Therefore, the air pressure regulator is small and excellent in operability. As versatility.

It is a longitudinal cross-sectional view of the pneumatic regulator of this invention. (First Example) It is a side view of the air pressure regulator of FIG. (First Example) It is a top view of the air pressure regulator of FIG. (First Example) It is a whole side view of the adapter member of FIG. (First Example) It is an end view of the adapter member of FIG. (First Example) It is a top view of the tape member which marked the scale which shows the several setting pressure of the secondary side of an air pressure regulator. (First Example) It is a side view which shows the other usage condition of the pneumatic regulator of this invention. (Second embodiment) It is a side view of the state which accommodated the pneumatic regulator of the Example of FIG. 7 in a pair of coupler. (Second embodiment) It is a longitudinal cross-sectional view inside the coupler of FIG. (Second embodiment)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pneumatic regulator 2 High pressure plug 3 Adapter member 4 Handle member 5 Cylinder part 6 Piston 11 Multi-thread screw 26 Pressure adjustment spring 31 Tape member which indicated the scale number and symbol which shows several setting pressures on the secondary side 32 Scale of tape member Reference point CX center axis for matching numbers and symbols

Claims (3)

  A handle member, an adapter member screwed into the handle member, and a pressure reducing valve mechanism are provided, and the compression amount of the pressure adjusting spring of the pressure reducing valve mechanism is reduced by relatively rotating the handle member and the adapter member. In the pneumatic regulator configured to change and change the set pressure on the secondary side, when the set pressure on the secondary side is changed, the relative rotation angle between the handle member and the adapter member is 0. The pitch and lead of the screw constituting the screwing portion between the handle member and the adapter member are set so that the change of the set pressure is completed within the range of 360 degrees to 360 degrees. regulator.   2. The pneumatic regulator according to claim 1, wherein a scale indicating a plurality of set pressures on the secondary side is marked on the outer peripheral surface of the handle member, and a reference point for aligning the scale is marked on the outer surface of the adapter member. The pneumatic regulator.   3. The pneumatic regulator according to claim 1, wherein the handle member has a cylindrical shape as a whole, a high-pressure plug is attached to the handle member, and a through-hole having a central axis of the handle member as a central axis is attached to the adapter member. And the pressure reducing valve mechanism includes a cylinder portion formed inside the handle member with the central axis as a central axis, a piston slidably fitted in the cylinder portion and the through hole, and the piston And the pressure adjusting spring interposed between the adapter member, a pressure chamber defined by the piston and the cylinder portion, and a primary fluid passage extending from the pressure chamber to the inside of the high pressure plug. A secondary fluid passage that extends from the pressure chamber to the through hole in the piston, and opens and closes the primary fluid passage in conjunction with the piston. And having a body, said pneumatic regulator.

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