JP2005030553A - Fluid pressure operated body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problems on various fluid pressure operated bodies each using a fluid pressure operated diaphragm formed of a rubber that an operating member should be fixed to a center opening with caulking and caulked at its peripheral edge to a cover and so the number of parts and the number of manufacturing processes are increased resulting in high costs and difficult management in optional caulking. <P>SOLUTION: A cylindrical shell member 2 and an uneven diaphragm 4 are integrally formed of a resin. The diaphragm 4 is bent ranging from a supporting portion 5 of the shell member 2 to bent portions 6, 7, 8, 9 in sequence into an uneven shape as a whole. It has a flat portion 10 at the center. The flat portion 10 serves as a valve element which directly opens/closes an opening 17 of a fluid outlet port. Thus, when a fluid from a fluid inlet port 3 is at high pressures, the diaphragm 4 rises against a spring 16 and then the flat portion 10 releases the opening 17 with the pressure of the fluid to allow the discharge to the fluid outlet port. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a fluid pressure operating body such as a regulator for controlling fluid pressure using a diaphragm and a damper for damping fluid pressure pulsation, and more particularly to a fuel regulator for an internal combustion engine, a fuel pulsation damper, and a beverage container to a server. The present invention relates to a fluid pressure operating body used for a beer regulator or the like that controls the pressure of carbon dioxide gas to a container according to the temperature of beer supplied to the container.

  2. Description of the Related Art Conventionally, diaphragms are used in various fields for handling fluids to operate various members according to the pressure of the fluid. For example, in order to adjust the fuel supplied from the fuel pump to the fuel injection device to a predetermined pressure so that accurate fuel injection can be performed also in the fuel supply system of the internal combustion engine, for example, as shown in Japanese Patent Application Laid-Open No. 2000-38969. Such a fuel regulator is used.

  In this fuel regulator, as shown in FIG. 13, a fuel inflow member 132 is provided on the side wall of the body 131, and a valve receiver 135 is protruded and fixed to a support portion 134 that protrudes into the valve chamber 133. Further, a rubber diaphragm 137 is placed on the flange 136 of the body 131, and a cover 138 is placed on the rubber diaphragm 137, and the diaphragm 137 is sandwiched between the cover 138 and the body 131 by an outer periphery caulking 140 and fixed and integrated. In addition, a projecting portion 143 of the lower plate 142 is projected upward from the lower side in the drawing to the center opening portion of the diaphragm 137, and the upper plate 144 is applied from above so as to sandwich the diaphragm 137, and the projecting portion 143 of the lower plate 142 is provided. The diaphragm 137 is sandwiched and fixed by caulking in the diameter expansion direction.

  In the illustrated fuel regulator 130, a valve body 145 is provided at the lower center portion of the lower plate 142, and the valve body 145 is fixed to a spherical body 147 that is rotatably supported by a support plate 146 of the lower plate 142. . Thereby, the pressure of the fuel from the fuel inflow member 132 acting below the diaphragm 137 and the pressure difference between the pressure inside the intake pipe introduced into the cover 138 acting above the diaphragm 137 and the pressing force of the spring 148 are determined. The diaphragm moves up and down in the figure, and the valve body 145 opens and closes the opening 149 and adjusts the opening. At that time, when the valve body 145 closes the opening 149 regardless of the state of inclination when the diaphragm 137 is operated by the alignment mechanism using the spherical body 147, the valve body 145 on the flat plate can be in close contact with the opening 149. I am doing so.

  In a fuel supply device for an internal combustion engine, a fuel pulsation damper 150 as shown in FIG. 14 is used in addition to the fuel regulator as described above. The fuel pulsation damper 150 is covered with a cover 154 on a flange 153 of a body 152 having a communication port 151 connected to a fuel supply line so as to sandwich a diaphragm 154, and a rubber is interposed between the cover 155 and the body 152 by an outer periphery caulking 156. A made diaphragm 154 is sandwiched and fixed and integrated. Further, a projecting portion 157 of the lower plate 156 is projected upward from below in the drawing to the center opening portion of the diaphragm 154, the upper plate 158 is applied from above so as to sandwich the diaphragm 154, and the projecting portion 157 of the lower plate 156 is provided. The diaphragm 155 is sandwiched and fixed by caulking in the diameter expansion direction.

  In the fuel pulsation damper 150, a bolt 161 is inserted from the center opening 160 of the cover 155, the tip of the bolt 161 is screwed into the protruding portion 157 of the lower plate 156, and the spring that presses the diaphragm 154 downward in the figure. 162, whereby when the fuel pressure chamber 163 of the body 152 is at a low pressure, the diaphragm 154 is urged downward by the spring 162. At this time, the head 164 of the bolt 161 is caught on the periphery of the opening 160 of the cover 155, thereby the diaphragm 154. Is suspended at that position.

  After that, when pulsation occurs in the fuel supply line and the fuel pressure chamber 163 becomes high pressure, the diaphragm 154 is raised against the pressing force of the spring 162. This force reduces sudden pressure changes in the fuel. On the contrary, when the fuel pressure in the fuel pressure chamber 163 decreases, the diaphragm 154 descends accordingly. At this time, the back pressure chamber 165 behind the diaphragm 154 communicates with the outside through the central opening 160, and the central opening can perform a breathing action. The fuel pulsation damper 150 is a suspension type in which a pulsation absorbing diaphragm 154 is suspended from an upper cover 155 by a bolt 161, but the bottom of the lower plate 156 is not used without using the bolt 161. There is also a receiving member type in which a receiving member capable of contacting the bottom wall of the lower body 152 is provided, or a receiving member that protrudes upward from the body 152 side and supports the diaphragm 154 from below is provided.

  In the fuel regulator 130 and the fuel pulsation damper 150 as described above, the protruding portion of the lower plate protrudes from the center opening of the diaphragm as described above, and a rubber-made portion is formed between the upper plate and the lower plate. Clamp the protruding part of the lower plate across the diaphragm and fix it in a liquid-tight manner.Further, sandwich the periphery of the diaphragm between the flanges of the body and the cover, and bend the flanges of either the body and the cover inward. It has a fixed structure.

  The actual production of the fluid pressure actuating member having such a structure is performed as shown in FIGS. 15 and 16, for example. That is, as shown in FIG. 15A, a lower plate 173 is placed in a recess 171 formed in a mold 172, and a projection 174 of the lower plate 173 is passed through the lower plate 173 so that a diaphragm 175 and an upper plate 176 are inserted. Place.

  Next, as shown in FIG. 15B, the diaphragm 175 and the upper plate 176 are pressed onto the lower plate 173 by a cylindrical preset member 177. A caulking die 179 is disposed in the hollow portion 178 of the preset member 177 so as to be movable up and down. An annular caulking projection 180 is formed on the lower edge of the caulking die 179. Thereafter, as shown in FIG. 5C, the caulking die 179 is lowered, and the upper plate peripheral edge of the projecting portion 174 of the lower plate 173 is spread outwardly by the annular caulking projection 180 to caulk the lower plate 173. The diaphragm 175 and the upper plate 176 are fixed integrally so that fuel does not leak from the central opening of the diaphragm 175.

  Next, as shown in FIG. 16 (a), the flange 183 of the body 182 is placed on the mold 181, and the periphery of the diaphragm 175 on which the lower plate 173 and the upper plate 176 are fixed as described above is provided. In the mounted state, the flange portion 185 of the cover 184 is placed, and the periphery of the diaphragm 185 is sandwiched between the flange portion 183 of the body 182 and the flange 185 of the cover 184. In the illustrated example, a caulking cylindrical portion 186 is formed on the flange portion 183 of the body 182.

  Thereafter, as shown in FIG. 16B, the diaphragm 175 and the flange 185 of the cover 184 are pressed onto the flange 183 of the body 182 by the cylindrical preset member 187. The preset member 187 is disposed in the hollow portion 189 of the caulking die 188. Thereafter, the caulking die 188 is lowered as shown in FIG. The caulking cylindrical portion 186 formed on the flange portion 183 is pressed, and the caulking cylindrical portion 186 is crushed while being bent inward. As a result, the outer periphery of the diaphragm 175 whose center opening is sealed by the lower plate 173 and the upper plate 176 as described above is sandwiched between the body 182 and the flange of the cover 184, and the outer peripheral edge is also sealed. A pressure actuator is manufactured.

  Various types of fluid pressure actuating bodies are used, and for example, those using bellows as disclosed in JP-A-2-89872 are also used. The main part of the fluid pressure actuating body using the bellows is as shown in FIG. 17 described as the prior art in the publication, and a rod 193 is attached to the end wall 192 of the resin bellows 191. The outer wall is movable in the direction of the arrow in the figure, and the end wall 192 is normally in contact with the valve seat 195 of the first member 194 by its elastic force. The bellows 191 has its base end 196 fixed to the second member 197. In addition, this fluid pressure action body is shown as what is used for various uses besides the fuel supply system of an internal combustion engine.

  Furthermore, the fluid pressure operating body using a diaphragm is also used in a temperature and pressure adjusting device for a sparkling beverage supply apparatus, for example, as shown in FIG. In the temperature / pressure adjusting apparatus for a sparkling beverage supply apparatus shown in the figure, the mounting portion 203 of the valve storage member 202 is screwed into the end opening of the casing 201, and at that time, the periphery of the diaphragm 204 is sandwiched between the two and fixed. Yes. The valve storage member 202 includes a first opening 205 that communicates with a carbon dioxide gas cylinder, and a second opening 206 that communicates with a sparkling beverage container such as a barrel of draft beer. A valve seat body 210 is provided between the secondary opening 206 and the secondary pressure chamber 209, and the valve seat 211 of the valve seat body 210 can be closed by a valve body 212 biased by a spring 213.

  A through hole 214 is formed at the center of the valve seat body 210, and a valve rod 215 protruding from the valve body 212 passes through the inner periphery of the through hole 214 with a gap. The central portion of the diaphragm 204 is sandwiched between the rod receiver 216 and the spring receiver 217, and is integrated while securing the sealing performance of the central opening of the diaphragm 204 by caulking the tip of the protruding portion 218 of the rod receiver 216. The rod receiver 216 abuts the tip of the valve rod 215, and the spring receiver 217 abuts a spring 219 whose set pressure changes due to the thermowax that expands due to the temperature of the sparkling beverage such as draft beer supplied from the barrel to the server, The position of the valve body 212 with respect to the valve seat 211 is adjusted by the balance between the force of the spring 219, the pressure of the secondary pressure chamber 209 acting on the diaphragm 204, and the force of the spring 213 urging the valve body 212, and the sparkling beverage container The pressure of the carbon dioxide gas supplied to is adjusted according to the temperature of the sparkling beverage supplied to the server from the sparkling beverage container.

  The fluid pressure operating body is used in various fields as described above. For example, in the fuel regulator shown in FIG. 13 and the fuel pulsation damper shown in FIG. 14, the seal of the central opening portion of the rubber diaphragm is used. As shown in FIG. 15, when the caulking process of the tip of the protruding portion is performed using a die, a preset member, and a caulking die, the caulking force is adjusted, and the seal of the peripheral portion of the rubber diaphragm is performed. Similarly, when a caulking process is performed using a die, a preset member, and a caulking die while the caulking cylindrical portion around the body or the cover is wound, the caulking force is adjusted. Such a caulking process is performed at the center opening portion of the diaphragm of the temperature and pressure adjusting device for the sparkling beverage supply device as shown in FIG.

  Such a fluid pressure actuating body that needs to be caulked requires equipment such as a mold for its production and requires many steps. A caulking portion must be formed in advance on the part, which causes an increase in the number of parts and an increase in the amount of material used.

  In particular, the management of the caulking load is important, and the diaphragm is made of rubber. Therefore, when the compression rate of the rubber material at the time of caulking is excessive, the rubber breakage occurs, resulting in deterioration of durability and poor sealing. In addition, when the compression ratio is too small, the diaphragm is gradually removed from the caulking portion due to the operation of the diaphragm, which causes malfunction of the diaphragm and defective sealing. In particular, when the fluid to be handled is the fuel as described above, if the above-described seal failure occurs, the fuel leaks to the outside and there is a risk of fire.

  Furthermore, in order to increase the pressure resistance so that the diaphragm is not damaged even if the caulking force is increased to improve sealing performance and prevent slipping, it is also possible to use a diaphragm having a structure in which both sides of the base fabric are sandwiched between rubber layers. Though conceivable, such a diaphragm must be expensive and the product is expensive.

  In addition, when the diaphragm is made of rubber and used in the fuel supply system of the vehicle as described above, the fuel HC permeates the rubber layer and leaks to the outside, causing environmental pollution. In addition, there is a problem that a countermeasure for limiting HC discharged from the entire vehicle to the outside is required separately. Further, in a fluid pressure operating body using such a diaphragm, various metal members such as a lower plate and an upper plate are often required as shown in the various conventional examples. When using such metal parts, corrosion may occur gradually while in contact with the fluid during use, and surface treatment such as plating is required as a countermeasure, and the product is expensive. There is also a problem.

  In addition, the device that requires precise adjustment, such as the fuel regulator 130 shown in FIG. 13, requires a centering mechanism such as using a valve with a sphere when opening and closing the valve by the operation of the diaphragm. The cost increases due to the manufacturing process of the members, and the cost increases due to an increase in the number of assembly steps when assembling them.

On the other hand, in the case of using the synthetic resin bellows as shown in FIG. 17, it is necessary to make the bellows by alternately forming irregularities in the horizontal direction in the figure, but at the time of production, injection molding is performed using a mold. , There is an uneven shape in a direction perpendicular to the die cutting, which makes it difficult to die cut, increasing the number of manufacturing steps by cutting and increasing the cost.
JP 2000-380969 A Japanese Patent Laid-Open No. 2-89872

  In the conventional fluid pressure operating body, as described above, extra parts and members for caulking are required, the number of assembling steps is increased, and caulking dies are also required. In particular, management of caulking load is important. Further, when a rubber diaphragm is used, there is a problem that the fuel HC permeates and leaks to the outside. When metal parts are used, a corrosion-resistant surface treatment such as plating is required. In addition, there is a problem that a centering mechanism is required for precise valve control, and the use of resin bellows increases the number of manufacturing steps.

  Therefore, in order to solve the above problems, the present invention can be manufactured without performing caulking, does not require various parts such as metal parts, is easy to manufacture, is inexpensive, and allows HC to pass therethrough. An object is to provide a fluid pressure actuating body that does not.

  In order to solve the above problems, a fluid pressure operating body according to the present invention includes a shell member, a spring, a fluid pressure passive member, and a fluid inlet / outlet pipe, wherein the fluid pressure passive member is made of resin. That is, the unevenness for operation is formed in the operation axis direction by the fluid pressure.

  In another fluid pressure operating body according to the present invention, the operation unevenness is a concentric circle in the fluid pressure operating body.

  Another fluid pressure operating body according to the present invention is the fluid pressure operating body in which the fluid pressure passive member is integrated with an outer shell member on the fluid pressure passive side.

  In another fluid pressure operating body according to the present invention, in the fluid pressure operating body, the fluid pressure passive member is a valve body and is disposed so as to be openable and closable facing the valve seat.

  In another fluid pressure operating body according to the present invention, the fluid pressure passive member of the fluid pressure passive member is always in communication with the fluid inlet / outlet pipe.

  In another fluid pressure operating body according to the present invention, in the fluid pressure operating body, the means for always communicating is a structure in which the fluid pressure passive member is suspended from the back pressure side.

  In the fluid pressure operating body according to the present invention, in the fluid pressure operating body, the means for always communicating is in contact with an end of the fluid inlet / outlet pipe, and the fluid inlet / outlet pipe is connected to the fluid pressure passive side. An opening for communication is provided.

  Since the present invention is configured as described above, it is not necessary to perform caulking processing as in the conventional fluid pressure operating body, no extra parts or members for caulking are required, the assembly man-hour can be reduced, and caulking is performed. There is no need for a mold, and the need for difficult caulking load management is eliminated. Also, the problem of fuel HC permeating through the rubber diaphragm and leaking to the outside can be solved, and a fluid pressure operating body can be constructed without using metal parts. Corrosion-resistant surface treatment such as plating when used is not necessary. In addition, it does not require an alignment mechanism for precise valve control, and the direction of the unevenness of the fluid pressure operating body is parallel to the axis of the operating direction of the operating body, simplifying the construction of the manufacturing mold and making it from resin It is also possible to prevent an increase in the number of manufacturing steps such as those using a bellows to form irregularities in a direction perpendicular to the axis of the operation direction.

  The present invention is directed to a fluid pressure operating body having an outer shell member, a spring, a fluid pressure passive member, and a fluid inlet / outlet pipe, wherein the fluid pressure passive member is made of resin, and an operation axis direction due to fluid pressure This is realized by forming the unevenness for operation on the outer surface and integrating the fluid pressure passive member with the outer shell member on the fluid pressure passive side.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an example in which the present invention is applied to a fuel regulator. In the fuel regulator 1 of the illustrated embodiment, a fluid introduction port is provided below the side of the cylindrical outer shell member 2 made of resin. 3, and a resin diaphragm 4 as a fluid pressure actuating member formed integrally with the outer shell member 2 is provided at an inner intermediate portion of the outer shell member 2. In the illustrated diaphragm 4, a first bent portion 6 bent upward in the figure with a support portion 5 protruding horizontally from an intermediate portion of the outer shell member 2 as a base, and subsequently a second bent portion 7, A bent portion is formed in order of the third bent portion 8 and the fourth bent portion 9, and a flat plate portion 10 is formed at the center. As a result, these bent portions form concavities and convexities concentrically around the center line of the cylindrical outer shell member 2.

  An upper lid member 12 having a breathing hole 11 at the center is fixed to the upper part of the cylindrical outer shell member 2 in the figure, and a lower lid member having a fluid discharge port 13 at the lower part of the outer shell member 2 in the figure. 14 is fixed. Various means can be adopted to fix the upper lid member 12 and the lower lid member 14 to the outer shell member 2, but when these members are made of resin, they can be fixed by welding or adhesion, and snap It may be a bond. When fixed by snap coupling, the upper lid member 12 and the lower lid member 14 can be formed of any material including a metal material.

  The leading end 15 of the illustrated fluid discharge port 13 extends to a substantially middle portion of the outer shell member 2, and the flat plate portion 10 of the diaphragm 4 is contracted between the top lid member 12 and the flat plate portion 10 of the diaphragm 4 at the leading end portion. The opening 16 of the tip 15 of the fluid discharge port can be closed by abutting by the spring 16. Thereby, the flat plate part 10 itself formed in the diaphragm can function as a valve body that opens and closes the opening 17.

  When the fluid pressure operating body is used as the fuel regulator 1 in the fuel supply system of the internal combustion engine as shown in FIG. 1, the fluid introduction port 3 is connected in the fuel pipe, and the fluid return port or the fuel tank is provided. A fluid discharge port 13 that directly communicates with the fluid pressure operating body 1 allows fluid to flow in and out. Thereby, when the fuel pressure in the fuel pipe introduced from the fluid introduction port 3 is high, the diaphragm 4 is raised in the drawing to separate the flat plate portion 10 of the diaphragm 4 from the opening 17 and increase the opening area of the opening 17. As a result, the fuel discharge amount is increased, and the pressure of the fuel in the fuel supply pipe is decreased. On the contrary, when the fuel pressure in the fuel pipe introduced from the fluid introduction port 3 is lowered, the diaphragm 4 is moved downward in the figure by the spring 16 and the flat plate portion 10 of the diaphragm 4 is brought close to the opening 17. Thereby, the fuel discharge amount is reduced by reducing the opening area of the opening 17 and the pressure of the fuel in the fuel supply pipe is increased.

  As described above, the fluid pressure operating body has a diaphragm made of resin, and is particularly molded integrally with the outer shell member. Therefore, all of the fluid pressure operating body including the flat plate portion 10 that performs valve operation can be integrally formed. This eliminates the need for caulking using other members on the inner and outer peripheral edge portions of the rubber diaphragm as in the conventional fluid pressure operating body. In addition, it is possible to eliminate the problem of fuel HC permeating through the rubber diaphragm and leaking to the outside, and it is also possible to configure a fluid pressure operating body without using metal parts. Therefore, it is not necessary to perform corrosion-resistant surface treatment such as plating. Furthermore, when a precise pressure adjustment is required, the flat plate portion that is located at the center of the rubber diaphragm and acts as a valve moves in parallel to the axial direction that is the operation direction of the diaphragm, compared to the rubber diaphragm. It does not require an alignment mechanism like the conventional one. In addition, an increase in the number of manufacturing steps can be prevented as compared with the case where formation of irregularities in the direction perpendicular to the axis as in the case of using a resin bellows.

  The fluid pressure operating body according to the present invention can also be used in, for example, a pulsation damping device as shown in FIG. The example shown in FIG. 2 shows an example in which the fluid pressure actuating body according to the present invention is applied to a fuel damper 21 provided in a fuel supply system of an internal combustion engine, and the diaphragm 24 has substantially the same configuration as the diaphragm 4 shown in FIG. I am doing. The diaphragm 24 of the fuel damper shown in FIG. 2 includes a fluid introduction port 23 below the side portion of the cylindrical outer shell member 22 made of resin, and the outer shell member 22 at the inner middle portion of the outer shell member 22. And a resin diaphragm 24 as a fluid pressure actuating member formed integrally.

  In the illustrated diaphragm 24, similarly to the diaphragm 4 shown in FIG. 1, a first bent portion 26 that is bent upward from the support portion 25 that protrudes horizontally from the middle portion of the outer shell member 22, and thereafter continues. The second bent portion 27, the third bent portion 28, and the fourth bent portion 29 are formed in this order, and the flat plate portion 30 is formed at the center. Accordingly, these bent portions are the same as those shown in FIG. 1 in that they are formed in concentric irregularities with the center line of the cylindrical outer shell member 22 as the center. However, the diaphragm 24 of the fuel damper 21 shown in FIG. 2 has a screw threaded portion 35 formed on the upper surface of the flat plate portion 30 in the drawing and is screwed with a screw 37 as will be described later.

  An upper lid member 32 having an opening 31 at the center is fixed to the upper part of the cylindrical outer shell member 22 in the figure, and a lower lid member 34 having a fluid discharge port 33 is fixed to the lower part of the outer shell member 22 in the figure. is doing. In order to fix the upper lid member 32 and the lower lid member 34 to the outer shell member 22, as described in the description of FIG. 1, when these members are made of resin, they can be fixed by welding or bonding, May be combined.

  A spring 36 is contracted between the upper surface of the diaphragm 24 and the lower surface of the upper lid member 32 in the drawing, and a screw 37 passes through the opening 31 of the upper lid member 32 with a sufficient gap, and the tip of the spring 36 is the above-mentioned. Thus, it is screwed into a screw threaded portion 35 formed in the flat plate portion 30 of the diaphragm 24. Further, the head portion 38 of the screw 37 can be locked to the upper surface of the upper lid member 32 in the figure, so that when the diaphragm 24 is urged downward in the figure by the pulling 36 in the free state, Since the portion 38 is locked to the upper surface of the upper lid member 32 as shown in the drawing, the diaphragm is supported in a suspended state.

  With such a configuration, when the fluid introduction port 23 and the fluid discharge port 33 are connected in the fuel pipe, when the fuel pressure in the fuel pipe introduced from the fluid introduction port 23 increases due to pulsation, the diaphragm 24 is moved to the spring 36. The pressure in the figure is increased against the pressing force of the pressure, and the volume in the fuel pipe is increased to absorb the high-pressure change in pulsation. Conversely, when the pulsating fuel pressure in the fuel pipe introduced from the fluid introduction port 23 becomes low, the diaphragm 24 moves downward in the figure by the spring 36 and its own weight, etc., and the volume in the fuel pipe is reduced to pulsate. Absorbs low pressure changes.

  In the fuel damper 21, as in the fuel regulator shown in FIG. 1, the diaphragm 24 as the fluid pressure operating body is made of resin, and in particular, is integrally molded with the outer shell member 22. All can be integrally formed including the flat plate portion 30 that performs the valve operation, and it is not necessary to perform caulking processing using other members on the inner and outer peripheral edge portions of the rubber diaphragm like the conventional fluid pressure operating body. In addition, it is possible to eliminate the problem of fuel HC permeating through the rubber diaphragm and leaking to the outside, and it is also possible to configure a fluid pressure operating body without using metal parts. Therefore, it is the same as in the above embodiment that it is not necessary to perform corrosion-resistant surface treatment such as plating, and that an increase in the number of manufacturing steps as in the case of using a fat bellows can be prevented.

  The fuel damper shown in FIG. 2 is an example of a two-port type provided with an inlet / outlet with respect to the fuel piping system. However, the fuel damper can also be applied to a one-port type fuel damper as shown in FIG. The fuel damper 41 shown in FIG. 3 shows an example in which the internal structure is similar to that of the fuel regulator 1 shown in FIG. The difference is that the introduction port 3 is not provided, a fuel inflow / outflow port 43 is used instead of the fuel discharge pipe 13, and a plurality of cut-out openings 45 are formed at the tip 44 of the fuel outflow / ingress port 43. . Further, a diaphragm 46 is formed integrally with a cylindrical outer shell member 42 made of resin, and a flat plate portion 48 at the center thereof is locked to the tip of the fuel inflow / outflow port 43 by a spring 47. Since this point is the same as that shown in FIG. 1, detailed description of the structure is omitted.

  When such a fuel damper 41 is operated, when the fuel pressure from the fuel inflow / outflow port 43 connected to the fuel pipe of the internal combustion engine increases due to pulsation, the diaphragm 46 rises against the spring 47, and FIG. As in the case of the fuel damper 41, the volume in the fuel pipe is substantially increased to suppress an increase in pressure, and conversely, when the fuel pressure decreases due to pulsation, the volume in the fuel pipe is substantially decreased to reduce the pressure. The decrease can be suppressed, and this can be repeated to attenuate the fuel pulsation.

  Also in the fuel damper 41 as described above, the problems of the conventional technology can be solved similarly to the fuel regulator shown in FIG. 1 and the fuel damper 21 shown in FIG. Are the same, and the description thereof is omitted.

  The fuel damper 41 shown in FIG. 3 is a 1-port type, but FIG. 4 shows an example in which this is a 2-port type and the opening 45 is further modified. That is, the fuel inflow / outflow port 43 shown in FIG. 3 shows an example in which an opening 45 having a cut shape is formed from the front end side, but at the front end of the fuel discharge port 52 of the fuel damper 51 shown in FIG. The example which formed the some opening 53 which penetrates is shown. Also in the fuel damper 51, as in the fuel damper shown in FIGS. 2 and 3, a diaphragm 55 is integrally formed on a resin-made cylindrical outer shell member 54, and a flat plate portion 58 at the center thereof is formed. The spring 56 is configured to be locked to the tip of the fuel inflow / outflow port 52, and the other points are the same as those shown in FIGS. The fuel damper 51 also operates in the same manner as the fuel damper and exhibits the same function and effect, so the description thereof is omitted.

  FIG. 5 shows an embodiment in which the fluid pressure actuating body according to the present invention is applied to another type of fuel regulator 61. In this fuel regulator 61, a resin-made cylindrical outer shell member 62 is used. A diaphragm 63 is integrally formed as in the above embodiments, and a central opening 65 is formed in a flat plate portion 64 at the center. A valve seat member 66 is fixed to the inside of the outer shell member 62 by welding, bonding, snapping, or the like, and a flat plate portion 64 of the diaphragm 63 is brought into contact with the valve seat portion 68 by a spring 73 so as to be opened. 65 can be closed. An upper cover member 69 having a fuel inflow port 70 is fixed to the upper part of the outer shell member 62 in the figure, and a lower cover member 71 having a fuel outflow port 72 is fixed to the lower part of the outer shell member 62 in the figure. .

  In such a fuel regulator 61, when the fuel pressure in the fuel inflow port 70 is high, the diaphragm 63 is pushed down against the spring 73 in the drawing to separate the central opening 65 of the flat plate portion 64 from the valve seat portion 68. This opens according to the fuel pressure. Thereby, surplus fuel in the fuel pipe is returned from the fuel inlet port 70 to the fuel tank or the like via the opening 67 of the valve seat member 66, the center opening 65 of the diaphragm 66, and the fuel discharge port 72. In this fuel regulator, it is clear that the problem of the prior art is solved in the same manner as described above, and the description thereof will be omitted.

  The resin diaphragm as described above can have various shapes. For example, as shown in FIG. 6A, an upper portion of the outer shell member 75 projects from the support portion 76 that horizontally projects the diaphragm 80 in the figure. From the first bent portion 77 bent to the center to the flat plate portion 78 at the center, all the bent portions may be positioned above the support portion 76 in the figure, or as shown in FIG. Contrary to this, as shown in the diaphragm 81, all the bent parts from the support part 76 to the flat plate part 78 at the center after the first bent part 79 bent downward in the figure are shown in the figure. You may form so that it may be located below.

  The uneven shape of the resin diaphragm can also be set to various shapes as shown in FIG. 7, for example. The example shown in FIG. 7A shows an example in which the concave and convex cross section of the diaphragm 82 is formed in a triangular shape as in the above embodiments. In such a cross-sectional shape, the angle θ formed by each bent portion can be arbitrarily set. FIG. 5B shows an example in which the concave-convex cross-sectional shape of the diaphragm 83 is a trapezoid, and the angle θ formed by each bent portion can be arbitrarily set also here. FIG. 5C shows an example in which the bent portion of the diaphragm 84 is formed as a curve so that the overall cross section of the concave and convex portions has a waveform. In this example, the angle θ formed by the adjacent concave and convex portions is also shown. It can be arbitrarily set, and the curvature at which adjacent concavities and convexities intersect can also be arbitrarily set. FIG. 4D shows an example in which the concave and convex shapes of the diaphragm 85 are all bent at right angles in a zigzag shape so as to have a rectangular cross section, and the rectangular shape can also be arbitrarily set. . Further, in the present invention, the various shapes as described above can be used in any combination, and the angles θ formed by the bent portions as described above are not all equal and may be changed as appropriate.

  In forming the diaphragm, the above-described embodiments all show examples in which the flat plate portion at the center of the diaphragm is set to the same height as the supporting portion in the periphery in a normal setting state. As shown in FIG. 6, the bent portion of the diaphragm may be formed so that the flat plate portion 78 at the center of the diaphragm 86 is positioned above the peripheral support portion 76 in the figure, and is shown in the diaphragm 87 of FIG. Thus, conversely, the central flat plate portion 78 may be formed so as to be located below the peripheral support portion 76 in the figure.

  Further, for example, as shown in FIG. 9, the height of the bent portion may be formed so as to change from the periphery to the center, and the diaphragm 88 shown in FIG. An example in which the height is gradually lowered from the periphery toward the center is shown, and the diaphragm 89 in FIG. 5B is an example in which the height of the bent portion is gradually increased from the periphery toward the center. Yes. Since the diaphragm according to the present invention is made of resin, it is possible to easily manufacture diaphragms having various shapes as described above.

  As a spring for urging the diaphragm, for example, a plate-shaped spring 91 as shown in FIG. 10A may be used in addition to the coil spring as described above. In the dish-shaped spring 91 shown in FIG. 10A, the peripheral portion thereof is bent downward in the figure, and the lower end portion thereof is bent radially inward to form an elastic locking portion 92. Correspondingly, in the diaphragm 94 integrally formed with the outer shell member 93 similar to each of the embodiments, an annular protrusion 95 projecting to the outer periphery is formed at the upper end portion of the outer shell member 93. Accordingly, the elastic locking portion 92 rides on the protruding portion 95 by placing the plate-shaped spring 91 on the outer shell member 93, and further pushes the protruding portion 95 so that the elastic locking portion 92 is attached to the protruding portion 95 as shown in the figure. Lock against. As a result, the pressing portion 96 formed at the center of the plate-shaped spring 91 opposes the coil spring 97 that pushes up the diaphragm 94 upward in the drawing, and presses the diaphragm 94 downward in the drawing. By configuring in this way, the spring that presses the diaphragm 94 downward and the upper lid member can be used together, so the number of parts can be reduced and both can be coupled by snap fitting, thus simplifying the manufacturing process. It can also be converted.

  In the example shown in FIG. 10A, as in the embodiment shown in FIGS. 1 to 9, a support portion 98 is formed inside the outer shell member 93 at a right angle to the outer shell member 93. Although the example which formed the uneven | corrugated diaphragm 94 by forming the 1st bending part 99 from the support part 98 and connecting subsequent bending parts was shown, other than that, for example, it shows in FIG.10 (b), for example As described above, the first bent portion 99 is formed directly from the outer shell member 93, and the concave and convex diaphragm 94 is formed by connecting the subsequent bent portions so that the support portion 98 is not provided. You can also. In this manner, the support portion 98 can be omitted in the same manner in each of the embodiments shown in FIGS.

  In any of the above embodiments, the diaphragm and the outer shell member are integrated. However, the present invention is not limited to such an example. For example, as shown in FIG. 11, the diaphragm 100 and the outer shell member 101 are separated. It is good. In the example shown in FIG. 11, an example is shown in which a fluid pressure passive body 103 that functions as a pulsation damper is attached to the end of the delivery pipe 102 in the fuel supply line of the internal combustion engine. A flange 104 is formed, a ring-shaped pipe end groove 105 is provided on the end face of the flange 104, and a cover 107 provided with a flange 106 on the outer periphery thereof is disposed. Further, the flange 106 of the cover 107 is also provided with a cover end groove 108 at a position facing the pipe end groove 105.

  The diaphragm 100 includes a ring-shaped locking protrusion 111 on the outer periphery, and an outer peripheral edge 112 is formed on the outer periphery of the locking protrusion 111. As shown in FIG. 11, when the flange 106 of the cover 107 is brought into contact with the end of the delivery pipe 102, the engagement protrusion of the diaphragm 110 is formed in the annular recess 113 formed by the pipe end groove 105 and the cover end groove 108. It attaches so that 111 and the outer periphery 112 may fit. At that time, the outer peripheral edge 112 of the diaphragm 100 is sandwiched between the grooves by the O-rings 114 and 115. In this state, the pipe end groove 105 and the cover end groove 108 are fixed by the screw 116 at the outer periphery thereof, and the resin diaphragm 110 is thus fixed to the end of the delivery pipe 102.

  A valve receiver 117 is further formed at the end of the delivery pipe 102, and the end of the valve receiver 117 is provided with a notch-shaped opening 118 similar to that shown in FIG. A spring 119 is shrunk on the back surface of the diaphragm 100, so that a flat plate portion 120 formed at the center of the diaphragm 110 can be brought into contact with the end surface of the valve receiver 117. The cover 107 is provided with a breathing hole 121 to release the back pressure when the diaphragm is operated to the outside. Since the operation of the fluid pressure passive body as the pulsation damper as described above is the same as that shown in FIG. 3, the description thereof is omitted. Also in this embodiment, since the diaphragm is made of a resin in which the valve body functional part is integrally molded, caulking processing for fixing the valve body functional member is not necessary, and substantially the same functions and effects as those of the above embodiments are obtained. Can be made.

  In the above-described embodiment, when the resin diaphragm formed separately from the outer shell member is attached, the flange 104 of the delivery pipe 102 and the flange 106 of the cover 107 are coupled, and the outer peripheral edge of the diaphragm is formed in the groove. Although an example in which the screw 116 is used for holding is shown, other flanges may be sandwiched by the elastic force of the clip 122 as shown in FIG.

  The present invention can be carried out in various modes as described above, but such a fluid pressure operating body is also applied to the temperature and pressure control device for a sparkling beverage supply device as shown in FIG. In addition, the present invention can be used in any field as long as the operation is performed by the pressure of the fluid.

It is sectional drawing of the Example of this invention. Example 1 It is sectional drawing of the other Example of this invention. (Example 2) It is sectional drawing of other Example of this invention. (Example 3) It is sectional drawing of other Example of this invention. Example 4 It is sectional drawing of other Example of this invention. (Example 5) It is sectional drawing of other Example of this invention. (Example 6) It is sectional drawing of other Example of this invention. (Example 7) It is sectional drawing of other Example of this invention. (Example 8) It is sectional drawing of other Example of this invention. Example 9 It is sectional drawing of other Example of this invention. (Example 10) It is sectional drawing of other Example of this invention. Example 11 It is sectional drawing of other Example of this invention. Example 12 It is sectional drawing of a prior art example. It is sectional drawing of another prior art example. It is sectional drawing which shows the crimping process of the conventional diaphragm center opening part. It is sectional drawing which shows the crimping process of the conventional diaphragm outer periphery part. It is sectional drawing of another prior art example. It is sectional drawing of another prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fuel regulator 2 Outer shell member 3 Fluid introduction port 4 Diaphragm 5 Support part 6 1st bending part 7 2nd bending part 8 3rd bending part 9 4th bending part 10 Flat plate part 11 Breathing hole 12 Top cover member 13 Fluid discharge port 14 Lower lid member 15 Tip 16 Spring 17 Opening

Claims (7)

In a fluid pressure operating body having an outer shell member, a spring, a fluid pressure passive member, and a fluid inlet / outlet pipe,
The fluid pressure passive member according to claim 1, wherein the fluid pressure passive member is made of a resin and has operating irregularities formed in an operation axis direction due to the fluid pressure.   The fluid pressure operating body according to claim 1, wherein the operating irregularities are concentric.   2. The fluid pressure actuator according to claim 1, wherein the fluid pressure passive member is integrated with an outer shell member on the fluid pressure passive side.   The fluid pressure actuating body according to any one of claims 1 to 3, wherein the fluid pressure passive member is a valve body, and is disposed so as to be openable and closable facing the valve seat.   4. The fluid pressure operating body according to claim 1, wherein a fluid pressure passive side of the fluid pressure passive member is always in communication with the fluid inlet / outlet pipe. 5.   6. The fluid pressure operating body according to claim 5, wherein the means for always communicating is configured to suspend the fluid pressure passive member from a back pressure side.   6. The fluid pressure operating body according to claim 5, wherein the means for constantly communicating is in contact with an end of the fluid inlet / outlet pipe and an opening is provided in the fluid inlet / outlet pipe to communicate with a fluid pressure passive side. .

Images