JP4740292B2 - Seat block and valve device - Google Patents

Description

  The present invention relates to a seat block on which a valve body that opens and closes a valve passage is seated and a valve device including the seat block.

  In recent years, a pressure reducing valve that depressurizes a fluid flowing down a flow path, and an open / close valve that opens and closes the flow path and controls the fluid flowing down have been put to practical use.

  FIG. 10 is a cross-sectional view schematically showing a pressure reducing valve 2 including the seat portion 1 of the conventional first technique. FIG. 11 is an enlarged sectional view showing the sheet portion 1 in an enlarged manner. The pressure reducing valve 2 includes a housing 3, a piston 4, a seat portion 1, and a spring member 5. A primary port 6 and a secondary port 7 are formed in the housing 3, and a cylindrical piston 4 is inserted so as to be displaceable in the axial direction thereof. The piston 4 is held at its axially intermediate portion and one end, and the other end faces the primary port 6. The piston 4 is formed with a communication hole 8 that allows the primary port 6 and the secondary port 7 to communicate with each other. An annular valve body piece 9 protruding in the axial direction is formed at the other axial end of the piston 4. The housing 3 is provided with a seat portion 1 that surrounds the primary port 6 and on which a valve element piece 9 can be seated. An orifice 10 is formed by the valve body piece 9 and the seat portion 1. The inside of the housing 3 is partitioned by the orifice 10 into a primary pressure chamber 11 connected to the primary port 6 and a secondary pressure chamber 12 connected to the secondary port 7. The piston 4 is provided with a spring member 5. The spring member 5 biases the spring force toward the piston 4 in one axial direction. The pressure reducing valve 2 reduces the pressure of the fluid supplied to the primary port 6 by passing through the orifice 10 and discharges the working fluid from the secondary port 7.

  FIG. 12 is an enlarged view showing the sheet portion 1A of the second conventional technique. The seat portion 1 </ b> A is provided in the pressure reducing valve 2. The seat portion 1A surrounds the primary port 6 and is provided by being fitted to the housing so that the valve element piece 9 can be seated (see, for example, Patent Document 1).

  FIG. 13 is an enlarged view showing the sheet portion 1B of the third conventional technique. The seat portion 1 </ b> B is provided in the pressure reducing valve 2. The seat portion 1B surrounds the primary port 6 and is provided by being fitted to the housing 3 so that the valve element piece 9 can be seated. The sheet portion 1B is clamped in cooperation with the housing by a fixing member 13 made of a metal material.

JP-A-2005-23975

  In the first conventional technique, for example, the sheet portion 1 needs to be bonded and fixed to the housing 3. When this sheet part 1 is bonded and fixed, there are the following problems. (1) Sufficient degreasing and drying of the bonding surface portion are necessary, and the number of man-hours increases. (2) When the sheet part 1 is bonded, sufficient adhesive strength is required.

  Since the seat portion 1 </ b> A according to the conventional second technique is merely fitted into the housing 3, the seat portion 1 </ b> A is displaced relative to the housing 3. As a result, the seating position of the piston 4 is different for each opening / closing operation, and the contact of the valve body piece 9 is shifted, that is, the valve body piece 9 is displaced with respect to the seat portion 1A. Due to this misalignment, the adhesiveness between the seat portion 1A and the valve body piece 9 is lowered, and even if the piston 4 is seated on the seat portion 1A and the orifice 10 is closed, fluid flows from the primary pressure chamber 11 to the secondary pressure chamber 12. To leak.

  In the conventional third technique, for example, the sheet portion 1B made of a synthetic resin material and the fixing member 13 made of a metal material have greatly different coefficients of thermal expansion, and thus have the following problems. (1) A gap is generated between the sheet portion 1 </ b> B and the fixing member 13 due to heat shrinkage accompanying the temperature change. As a result, the sheet portion 1 </ b> B rattles against the fixing member 13. The rattling of the seat portion 1B causes a displacement of the valve element piece 9. (2) Even if an attempt is made to clamp the sheet portion 1B for a long time using the fixing member 13 so as not to cause the gap, the sheet portion 1B is deteriorated over time, that is, sag occurs. This sagging eventually creates a gap between the fixing member 13 and the sheet portion 1B, and the sheet portion 1B becomes shaky. As a result, displacement of the valve body piece 9 occurs. Due to the displacement of the valve body piece 9, the fluid leaks from the primary pressure chamber 11 to the secondary pressure chamber 12 even when the orifice 10 is closed, as in the seat portion 1 </ b> A of the second conventional technique.

  An object of the present invention is to provide a seat block that can easily and reliably maintain the adhesion of the seat portion without being affected by the use conditions.

The present invention is closed when the valve body is displaced and seated in a first direction along a predetermined axis, and is released when the valve body is displaced from the seated state in a second direction along the axis. A housing in which a valve passage is formed;
A sheet portion forming body provided in the housing in a state in which displacement in the first direction along the axis is prevented;
An elastic member provided in the housing, having a non-linear spring characteristic, and pressing the sheet portion forming body in a first direction along the axis;
A spring receiving part interposed between the sheet part forming body and the elastic member and contacting the elastic member and the sheet part forming body ;
A fixed member that is fixed in the housing so as to abut against the elastic member and has an insertion hole through which the valve element is inserted ;
The sheet portion forming body is formed with a portion protruding in the second direction along the axis and inserted through the elastic member ,
The valve body is a seat block characterized that you seated into the first direction along the axis of the seat portion forming body.

In the invention, it is preferable that the elastic member is a non-linear spring member that obtains a stable spring force with respect to displacement in a direction along the axis and has a small spring constant.
Moreover, this invention is provided with the said seat block, It is a valve apparatus characterized by the above-mentioned.

According to the present invention, the seat portion forming body on which at least one valve body for opening and closing the valve passage is seated is provided in the housing in which the valve passage is provided. The sheet portion forming body is sandwiched between the elastic member and the housing. As a result, the sheet portion forming body can be easily mounted, and the number of man-hours can be reduced as compared with the conventional seat block. That seat portion forming body is sandwiched by the elastic member and the cooperating de the housing in a state of being granted the elastic force by the elastic member. Therefore, in the present invention, the bonding work as in the conventional first technique is unnecessary, and the manufacturing cost can be reduced by reducing the number of steps. Seat portion forming body, because it is clamped in a state where the elastic force is granted, even if the processing precision is low, suppresses relative displacement with respect to the housing, a backlash can be suppressed. Therefore, the adhesiveness of the sheet portion can be ensured without increasing the processing accuracy of the sheet portion forming body, and thus the manufacturing cost can be reduced.

Moreover, since the relative displacement of the sheet part molded body with respect to the housing can be suppressed by the elastic force of the elastic member, the positional deviation of the sheet part formed body for each opening / closing operation as in the prior art can be suppressed. Thereby, the position shift of the valve body with respect to the seat block can be suppressed. Therefore, the adhesiveness between the valve body and the seat portion forming body is reduced, and the fluid can be prevented from leaking to the downstream side. Seat portion forming body is sandwiched in a state of being granted the elastic force by the elastic member. Accordingly seat block, even if the case where the sheet portion forming body and housing is thermally contracted, the elastic member is granted an elastic force to the seat portion forming body, to maintain that pinching. In other words, the thermal contraction of the sheet portion forming body and the housing can be absorbed by the elastic member. As a result, rattling of the sheet portion forming body relative to the housing due to heat shrinkage can be suppressed. As described above, the number of man-hours can be reduced, and the valve block can be prevented from being displaced without being affected by the use conditions, and a seat block that can easily and reliably maintain the adhesion of the seat portion can be realized. .

  In addition, the elastic member has a smaller spring constant than a linear spring such as a coil spring, and a stable load with a small change with respect to the displacement can be obtained.

  According to the present invention, the elastic member is a non-linear spring member that can obtain a stable spring force with respect to displacement in a direction along the axis and has a small spring constant. Since the spring member has a small spring constant, the change in elastic force with respect to the amount of displacement is small. This makes it possible to impart a stable elastic force to the sheet portion forming body even when the processing accuracy of the component is low, or even when the sheet portion forming body is deformed. Therefore, a stable spring force can be applied to the sheet portion forming body even when the processing accuracy of the parts is low, or even when the sheet portion forming body is deformed.

  According to the present invention, it is possible to reduce the man-hour of the seat block, suppress the decrease in the adhesion between the seat portion forming body and the valve body when closing the valve passage, and realize the absorption of the heat shrinkage of the seat portion forming body and the housing. A valve device including a seat block can be realized.

  Hereinafter, a plurality of embodiments for carrying out the present invention will be described with reference to the drawings. Portions corresponding to the matters described in the preceding forms in each embodiment are denoted by the same reference numerals, and overlapping description may be omitted. When only a part of the configuration is described, the other parts of the configuration are the same as those described in the preceding section. In addition to the combination of parts specifically described in each embodiment, the embodiments may be partially combined as long as the combination is not particularly troublesome.

  FIG. 1 is a cross-sectional view showing a valve device 22 including a seat block 21 which is a first related embodiment related to the present invention. FIG. 2 is an enlarged sectional view showing the seat block 21 in an enlarged manner. FIG. 3 is a graph showing the characteristics of the spring member 23. The valve device 22 is a pressure reducing valve device that is interposed in a flow path and discharges a fluid such as a supplied gas under reduced pressure. The valve device 22 includes a pressure reducing valve portion 24, a seat block housing 25, a seat block 21, and a fixing member 26. The valve device 22 is configured based on a predetermined reference axis L1. One of the directions parallel to the reference axis L1 is referred to as one axial direction X1, and the other of the directions parallel to the reference axis L1 is referred to as the other axial direction X2. The pressure reducing valve portion 24, the seat block housing 25, and the seat block 21 have their axes substantially coincident with the reference axis L1. “Substantially matching” includes matching.

  The pressure reducing valve portion 24 includes a pressure reducing valve housing 27, a piston 28, a pressure reducing valve spring member 29, and a rod 30, and these axes are arranged so as to substantially coincide with the reference axis L1. The pressure reducing valve housing 27 includes a pressure reducing valve housing main body 27a, an inward flange portion 27b, and an open end portion 27c. The pressure reducing valve housing body 27a is formed in a substantially bottomed cylindrical shape. The “substantially bottomed cylindrical shape” includes a bottomed cylindrical shape. An inward flange portion 27b that protrudes radially inward over the entire circumference is formed in the opening of the pressure reducing valve housing body 27a. In the inner peripheral edge portion of the inward flange portion 27b, there is formed an opening end portion 27c that protrudes in a direction away from the pressure reducing valve housing body 27a, that is, in one axial direction X1, over the entire circumference. The inward flange portion 27b and the open end portion 27c are formed so that the inner wall portions thereof are substantially flush with each other. “Substantially flush” includes flush. A male screw is formed on the outer peripheral surface of the open end 27c.

  The piston 28 includes a piston portion 31 and a piston main body 32. The piston portion 31 is formed in a substantially bottomed cylindrical shape, and a flange-like piston main body 32 protruding outward in the radial direction is formed in the opening portion. The piston portion 31 is slidably displaceable in one axial direction X1 and the other X2 (hereinafter simply referred to as “axial direction X”) in a state in which sealing is achieved on the inner surfaces of the inward flange portion 27b and the open end portion 27c. It is held in the pressure reducing valve housing 27. The piston main body 32 is held so as to be slidable in the axial direction X in a state where a seal is achieved on the inner wall surface of the pressure reducing valve housing main body 27a. A substantially annular pressure-reducing valve spring housing space 33 surrounded by the piston portion 31, the piston body 32, the pressure-reducing valve housing body 27a, and the inward flange portion 27b is formed. The “substantially annular” includes an annular shape. A pressure reducing valve spring member 29 is disposed in the pressure reducing valve spring storage space 33. The pressure reducing valve spring member 29 is, for example, a compression coil spring, and is externally mounted on the piston portion 31. One end portion and the other end portion in the axial direction of the pressure reducing valve spring member 29 are in contact with the piston main body 32 and the inward flange portion 27b, respectively. The pressure reducing valve spring member 29 biases the piston 28 with a spring force toward the other axial direction X2. An atmosphere opening hole 34 is formed in the pressure reducing valve housing main body 27 a, and the pressure reducing valve spring accommodating space 33 is opened to the atmosphere by the atmosphere opening hole 34.

  The rod 30 is generally formed in a cylindrical shape, and most of the rod 30 is inserted into the piston 28. The bottom portion 36 of the piston portion 31 is disposed so as to approach and separate from one end portion 35 in the axial direction of the rod 30. The piston 28 is held on the inner wall portion of the piston 28 so as to be slidable and displaceable in a state where the piston 28 achieves a seal. A back pressure chamber 37 surrounded by one axial end portion 35 of the rod 30 and the bottom portion 36 of the piston portion 31 is formed. The other axial end 37 of the rod 30 is formed in a flange shape that protrudes slightly outward in the radial direction over the entire circumference. The other axial end portion 37 of the rod 30 projects from the opening of the piston 28 to the other axial direction X2. A substantially annular space 38 is formed that is surrounded by the piston 28, the pressure reducing valve housing body 27a, and the outer peripheral surface portion of the other axial end portion 37.

  The seat block housing 25 is formed with a pressure reducing valve portion screwing recess 39, a fixing member screwing recess 40, and a seat block holding portion 41. The pressure-reducing valve portion screwing recess 39 is formed on the other X2 side in the axial direction of the seat block housing 25 and opens to the other X2 in the axial direction. The pressure-reducing valve portion screwing recess 39 is formed along the reference axis L1. The pressure-reducing valve portion screwing recess 39 is internally threaded with an internal thread, and the open end 27c is screwed. The fixing member screw recess 40 is formed on the one X1 side in the axial direction of the seat block housing 25 and opens to one X1 in the axial direction. The fixing member screw recess 40 is formed along the reference axis L1. The fixing member screw recess 40 is formed with a female screw on the inner periphery thereof. The seat block holding part 41 communicates the pressure reducing valve part screwing concave part 39 and the fixing member screwing concave part 40. The seat block holding part 41 is formed along the reference axis L1. The seat block holding part 41 is formed to have a smaller diameter than the pressure reducing valve part screwing concave part 39 and the fixing member screwing concave part 40 in order to hold the seat block 21. The seat block holding portion 41 is formed with an inward flange portion 42 for restricting the displacement of the seat block 21 in the other axial direction X2. The inward flange portion 42 is formed at the opening on the other axial direction X2 side so as to protrude radially inward over the entire circumference.

The seat block 21 includes a seat portion forming body 43, a spring receiving portion 44, and a spring member 23. The sheet part forming body 43 is formed of, for example, rubber or synthetic resin. The sheet portion forming body 43 is generally formed in a cylindrical shape, and an outward flange portion 45 protruding outward in the radial direction over the entire circumferential direction is formed at one end in the axial direction. The seat portion forming body 43 is inserted into the seat block holding portion 41 in a state where the outward flange portion 45 and the inward flange portion 42 are engaged, and the piston 28 is disposed so as to be seated. The seat portion forming body 43 is held in a state where the outer peripheral portion of the outward flange portion 45 achieves a seal on the inner peripheral portion of the seat block holding portion 41. In the sheet portion forming body 43, the outward flange portion 45 is disposed on the one side X1 in the axial direction. The axis of the sheet part forming body 43 substantially coincides with the reference axis L1.

  The piston portion 31 is formed with a substantially annular valve body piece 46 projecting from the bottom portion 36 facing the seat portion forming body 43 in one axial direction X1. The valve body piece 46 presses the seat portion forming body 43 annularly in a state where the piston 28 is seated on the seat portion forming body 43. The valve body piece 46 cooperates with the seat portion forming body 43 to form a substantially annular orifice 47.

  The fixing member 26 is formed in a substantially cylindrical shape. The “substantially cylindrical shape” includes a cylindrical shape. The fixing member 26 is engraved with a male screw at an intermediate portion in the axial direction, and is screwed into the fixing member screw recess 40. In the fixing member 26, the one end portion 49 on the X1 side in the axial direction comes into contact with the seat block holding portion 41. The axis of the fixing member 26 substantially coincides with the reference axis L1. A substantially cylindrical hole-shaped spring accommodating space 50 surrounded by the fixing member 26, the seat portion forming body 43, and the seat block holding portion 41 is formed. The “substantially cylindrical hole shape” includes a cylindrical hole shape.

  The spring receiving portion 44 is generally formed in an annular shape. A spring insertion piece 51 is formed on the inner peripheral edge of the spring receiving portion 44 so as to protrude in the axial direction one X1 over the entire circumference. The spring receiving portion 44 is disposed in the spring storage space 50, and an outer peripheral portion thereof is fitted into and inserted into the seat block holding portion 41. The axis of the spring receiving portion 44 substantially coincides with the reference axis L1. The spring receiving portion 44 has a surface portion 52 on the other X2 side in the axial direction thereof in contact with the outward flange portion 45 of the sheet portion forming body 43.

  The spring member 23, which is an elastic member, includes a first seat portion 53, a second seat portion 54, and an inclined portion 55. The first seat portion 53 is formed in a substantially annular shape. The second seat portion 54 is formed in a substantially annular shape, and has an outer diameter and an inner diameter larger than the outer diameter of the first seat portion 53. The first seating portion 53 and the second seating portion 54 are arranged side by side in the axial direction X so that their axes substantially coincide with each other. The outer peripheral part of the first seating part 53 and the inner peripheral part of the second seating part 54 are connected to each other in the circumferential direction by an inclined part 55. The inclined portion 55 is inclined toward the other axial direction X2 from the second seat portion 54 inward in the radial direction, and continues to the first seat portion 53. The first seat portion 53, the second seat portion 54, and the inclined portion 55 are integrally formed. FIG. 3 shows the spring characteristics (hereinafter simply referred to as “spring characteristics”) of the spring member 23 thus formed and the spring characteristics (hereinafter referred to as “coil spring characteristics”) of the coil spring. In FIG. 3, the vertical axis represents the load in the axial direction X (hereinafter simply referred to as “load”), and the horizontal axis represents the amount of displacement in the axial direction X (hereinafter simply referred to as “displacement”). The spring characteristic indicates non-linearity, and the coil spring characteristic indicates linearity. The spring constant k1 in the range x1 ≦ x ≦ x2 of the displacement amount of the spring member 23 is smaller than the spring constant k2 in the range of the coil spring. Therefore, the spring member 23 can obtain a stable load with a small change with respect to the displacement as compared with a linear spring such as a coil spring. In the present embodiment, for example, the spring member 23 is used in this range.

  The spring member 23 is disposed in the spring accommodating space 50 so as to be elastically deformable. The first seat portion 53 abuts on the spring receiving portion 44, and an inner peripheral portion thereof is fitted on the spring insertion piece 51. The second seat portion 54 is in contact with the fixing member 26. The axis of the spring member 23 substantially coincides with the reference axis L1. The spring member 23 is disposed so as to be compressed by a displacement amount x from the natural length H, and biases the spring force F toward the other axial direction X2 to the sheet portion forming body 43 via the spring receiving portion 44. The spring member 23 urges this spring force and cooperates with the inward flange portion 42 to sandwich the sheet portion forming body 43. The spring member 23 is disposed in the spring accommodating space 50 by energizing a spring force F larger than the pressing force applied to the seat portion forming body 43 from the piston 28 and the fluid. In the spring receiving portion 44, the spring insertion piece 51 is disposed away from the fixing member 26 in order to allow displacement of the spring receiving portion 44 in the axial direction X and deformation of the spring member 23.

A supply path 56 is formed by the inner peripheral portion of the fixing member 26, and a valve hole 57 is formed by the inner peripheral portions of the seat portion forming body 43 and the spring receiving portion 44. The valve hole 57 and the supply path 56 are communicated with each other via the spring storage space 50. The fixing member 26, the seat portion forming body 43, and the spring receiving portion 44 have their axes substantially coincident with the reference axis L1, and their inner peripheral portions are formed substantially flush with each other.

  When the pressure reducing valve portion 24 is screwed, a pressure reducing valve space 58 in which the pressure reducing valve portion 24 and the seat block housing 25 are surrounded is formed in the pressure reducing valve portion screwing recess 39. The pressure reducing valve space 58 continues to the valve hole 57. The seat block housing 25 is formed with a discharge passage 59 that allows the pressure reducing valve space 58 to communicate with the outside. The piston 28 is formed with a piston flow path 60 that communicates the pressure reducing valve space 58 and the space 38, and a communication hole 61 that communicates the pressure reducing valve space 58 and the back pressure chamber 37. The pressure reducing valve space 58 has two regions via the orifice 47. Specifically, the pressure reducing valve space 58 includes a primary pressure chamber 62 that is a region formed radially inward from the orifice 47 and a secondary side that is a region formed radially outward from the orifice 47. And a region 63. The primary pressure chamber 62 is connected to a primary port 64 that is an opening that opens to the outside of the supply path 56. The secondary side region 63 continues to the secondary port 65 that is an opening that opens to the outside of the discharge path 59. The supply passage 56, the valve hole 57, the pressure reducing valve space 58, and the discharge passage 59 constitute a valve passage 66. The inside of the housing 67 is partitioned by the orifice 47 into a primary pressure chamber 62 and a secondary pressure chamber 68 including the secondary side region 63, the piston flow path 60 and the space 38. The housing 67 includes a pressure reducing valve housing 27, a seat block housing 25, and a fixing member 26. The primary pressure chamber 62 communicates with the back pressure chamber 37 through the communication hole 61.

  Below, operation | movement of the valve apparatus 22 formed in this way is demonstrated. When the fluid is supplied to the primary port 64, the fluid flows down to the primary pressure chamber 62 through the supply path 56 and the valve hole 57. The fluid in the primary pressure chamber 62 is reduced in pressure by passing through the orifice 47, flows down to the secondary pressure chamber 68, and is discharged from the discharge path 59. The fluid in the space 38 applies a secondary pressure against the spring force of the pressure reducing valve spring member 29 to the piston body 32. When the secondary pressure becomes larger than the spring force of the pressure reducing valve spring member 29, the piston 28 slides and displaces in the direction of closing the valve passage 66. When the secondary pressure becomes smaller than the spring force of the pressure reducing valve spring member 29, the piston 28 is slidably displaced in the direction of opening the valve passage 66 to adjust the secondary pressure of the fluid flowing down from the primary pressure chamber 62 to the secondary pressure chamber 68. The primary pressure applied to the piston 28 from the fluid in the primary pressure chamber 62 is canceled by the fluid in the back pressure chamber 37. In this way, the valve device 22 decompresses the fluid supplied to the primary pressure chamber 62 and discharges it from the secondary port 65.

  Below, the effect which the seat block 21 and the valve apparatus 22 show | play is demonstrated. According to the seat block 21 of the present embodiment, the seat portion forming body 43 on which the piston 28 for opening and closing the valve passage 66 is seated is provided in the seat block housing 25 in which the valve passage 66 is formed. The seat portion forming body 43 is sandwiched between the spring member 23 and the seat block housing 25. As a result, the sheet portion forming body 43 can be easily mounted, and the number of man-hours can be reduced as compared with the conventional seat block. That is, the sheet portion forming body 43 is sandwiched in cooperation between the spring member 23 and the housing 67 in a state where the spring force is urged by the spring member 23. Therefore, in the present invention, the bonding work as in the conventional first technique is unnecessary, and the manufacturing cost can be reduced by reducing the number of steps. Since the seat portion forming body 43 is sandwiched in a state where the spring force is urged, the relative displacement with respect to the seat block housing 25 can be suppressed and rattling can be suppressed even when the processing accuracy is low. . Accordingly, even if the processing accuracy of the seat block 21 and the seat block housing 25 is not increased, the adhesion of the seat portion can be ensured, and the manufacturing cost can be reduced.

Moreover, since the relative displacement of the sheet part forming body 43 with respect to the housing 67 can be suppressed by the spring force of the spring member 23, the positional deviation of the sheet part forming body 43 for each opening / closing operation as in the conventional technique can be suppressed. Thereby, the position shift of the valve element piece 46 with respect to the seat block 21 can be suppressed. Therefore, the adhesion between the valve body piece 46 and the seat portion forming body 43 is lowered, and it is possible to suppress the fluid from leaking to the secondary pressure chamber 68 from the downstream side, for example, the primary pressure chamber 62. The sheet portion forming body 43 is clamped by the spring force of the spring member 23. Therefore, even if the seat part forming body 43 and the seat block housing 25 are thermally contracted, the seat block 21 urges the spring member 23 to urge and hold the seat part forming body 43 with a spring force. maintain. In other words, the spring member 23 can absorb the thermal contraction of the sheet portion forming body 43 and the housing 67. As a result, rattling of the seat portion forming body 43 with respect to the seat block housing 25 due to heat shrinkage can be suppressed. As described above, the number of man-hours can be reduced, and the sheet block 21 can be easily and surely maintained by preventing the positional deviation of the sheet portion forming body 43 without being affected by the use conditions. can do.

  According to the seat block 21 of the present embodiment, a spring force that resists the pressing force of the piston 28 on which the spring member 23 is seated is biased to the seat portion forming body 43. Thus, when the piston 28 is seated on the seat portion forming body 43, it is possible to face the pressing force applied to the seat portion forming body 43. Therefore, when the piston 28 is seated on the seat portion forming body 43, it is possible to suppress the relative displacement of the seat portion forming body 43 with respect to the seat block housing 25, that is, to suppress the rattling of the seat portion forming body 43.

  According to the seat block 21 of the present embodiment, an elastic member that applies a spring force to the seat portion forming body 43 by the spring member 23 can be realized.

  According to the seat block 21 of the present embodiment, the spring member 23 is a non-linear spring member having a small spring constant k2. Since the spring member 23 has a small spring constant k2, the change in the spring force F with respect to the amount of displacement is small. Accordingly, even when the processing accuracy of the component is low, or even when the sheet portion forming body 43 is deformed, a stable spring force F can be applied to the sheet portion forming body 43.

  According to the seat block 21 of the present embodiment, the spring member 23 presses the seat portion forming body 43. Therefore, even if deformation due to aging occurs in the sheet portion forming body 43, the spring member 23 can absorb the deformation by pressing the sheet portion forming body 43. As a result, rattling of the sheet portion forming body 43 can be suppressed.

  According to the seat block 21 of the present embodiment, the spring member 23 has a spring constant k1 that is smaller than the spring constant k2 of the coil spring, and the change in the spring force that biases the displacement amount is small. Accordingly, even if the processing accuracy of the seat block 21 and the seat block housing 25 is low, the change in the spring force that the spring member 23 biases the seat portion forming body 43 is small, and a desired spring force is applied to the seat portion forming body 43. Thus, the processing accuracy of the seat block 21 and the seat block housing 25 can be lowered. Therefore, the manufacturing cost of the valve device 22 can be reduced. Further, even when the sheet portion forming body 43 is deformed due to heat shrinkage or aging deterioration, a stable force can be applied to the sheet portion forming body 43.

  According to the seat block 21 of the present embodiment, the spring receiving portion 44 is interposed between the seat portion forming body 43 and the spring member 23. As a result, the surface pressure acting on the sheet portion forming body 43 based on the spring force of the spring member 23 can be made uniform. Therefore, it is possible to suppress the one-side contact of the seat portion forming body 43 with respect to the seat block housing 25 and to suppress the seat portion forming body 43 from being locally pressed and deformed by the first seating surface 53. Since the spring insertion piece 51 is inserted through the spring member 23, rattling is suppressed, and contact with the spring receiving portion 44 is suppressed. Since the spring member 23 is constituted by the first seat portion 53, the second seat portion 54, and the inclined portion 55, the spring member 23 can be disposed in a smaller spring accommodating space 50 than a conventional coil spring. As a result, the seat block 21 can be reduced in size.

  According to the seat block 21 of the present embodiment, since the spring receiving portion 44 and the fixing member 26 are separated from each other in the axial direction X, the displacement of the spring receiving portion 44 in the axial direction X and the axial direction X of the spring member 23. Is allowed to be elastically deformed. As a result, the pressing force of the piston 28 can be buffered by the spring member 23, and damage to the seat block 21 and the fixing member 26 can be suppressed. Furthermore, the thermal contraction and thermal expansion of the sheet part forming body 43 can be absorbed, rattling due to thermal contraction, and damage due to thermal expansion can be suppressed.

  According to the seat block 21 of the present embodiment, since the spring member 23 abuts on the fixing member 26, the relative displacement amount of the fixing member 26 with respect to the seat block housing 25 in the axial direction X is changed. The spring force can be changed. Thus, a desired spring force can be applied to the sheet portion forming body 43 by the spring member 23.

  According to the seat block 21 of the present embodiment, the spring member 23 biases the seat portion forming body 43 with a spring force larger than the pressing force applied to the seat portion forming body 43 from the piston 28 and the fluid. Accordingly, the relative displacement of the sheet portion forming body 43 due to the piston 28 and the pressing force of the fluid is suppressed. Therefore, every time the piston 28 is seated, the displacement of the valve body piece 46 with respect to the seat portion forming body 43 can be suppressed, and a decrease in the adhesion can be suppressed. By suppressing the decrease in adhesion, it is possible to suppress the fluid from flowing from the primary pressure chamber 62 to the secondary pressure chamber 68 in a state where the valve passage 66 is closed.

  According to the valve device 22 of the present embodiment, the man-hour of the seat block 21 is reduced, and when the valve passage 66 is closed, a decrease in the adhesion between the seat portion forming body 43 and the piston 28 is suppressed, and the seat portion forming body is suppressed. 43 and the valve device 22 including the seat block 21 that absorbs heat shrinkage of the housing 67 can be realized.

  FIG. 4 is an enlarged cross-sectional view showing a seat block 21A according to an embodiment of the present invention. The valve device 22A according to an embodiment of the present invention includes a pressure reducing valve portion 24, a seat block housing 25A, a seat block 21A, and a fixing member 26A. The valve device 22A is similar in configuration to the valve device 22 of the first related embodiment. Accordingly, in the valve device 22A of the second embodiment, only the points different from the valve device 22 of the first related embodiment will be described with reference to FIG. 1, and the same reference numerals will be given to those having the same configuration. The description is omitted.

  In the seat block housing 25A, a pressure reducing valve portion screw recess 39, a fixing member screw recess 40A, a seat block holding portion 41A, a supply portion 69, and a discharge passage 59 are formed. The fixing member screwing recess 40A is formed from the bottom of the pressure reducing valve screwing recess 39 toward the one axial direction X1, and opens to the other axial direction X2. The fixing member screw recess 40 </ b> A is formed along the reference axis L <b> 1 and has a smaller diameter than the pressure reducing valve screw recess 39. The fixing member screw recess 40A is formed with a female screw on the inner periphery thereof. The seat block holding portion 41A is formed from the bottom of the fixing member screw recess 40A toward the one axial direction X1, and opens to the other axial direction X2. The seat block holding portion 41A is formed along the reference axis L1 and has a smaller diameter than the fixing member screw recess 40A. The supply portion 69 extends from the surface portion 70 on the one X1 side in the axial direction of the seat block housing 25A to the seat block holding portion 41A in the other axial direction X2, and is formed along the reference axis L1. The supply unit 69 opens in one axial direction X1, and communicates the seat block holding unit 41A and the outside. The supply portion 69 is formed with a smaller diameter than the seat block holding portion 41A, and a supply path 56A is formed by the inner peripheral portion thereof.

The seat block 21A includes a seat portion forming body 43A, a spring receiving portion 44A, and a spring member 23. The sheet portion forming body 43A is formed of, for example, rubber or synthetic resin. The sheet portion forming body 43A is generally formed in a cylindrical shape, and is formed with an outward flange portion 45A in which one end portion in the axial line direction protrudes radially outward. The seat portion forming body 43A is inserted into the seat block holding portion 41A in a state in which one end in the axial direction is in contact with the bottom portion 74 of the seat block holding portion 41A. In the seat portion forming body 43A, the piston 28 is seated, and the valve body piece 46 is disposed so as to be capable of being pressed against the seat portion forming body 43A. The outward flange portion 45A is disposed on the one X1 side in the axial direction. The valve body piece 46 forms a substantially annular orifice 47 in cooperation with the seat portion forming body 43A. The seat portion forming body 43A is held in a state in which the outer peripheral portion of the outward flange portion 45A achieves sealing on the inner peripheral portion of the seat block holding portion 41A. The axis of the sheet portion forming body 43A substantially coincides with the reference axis L1. The inner peripheral portion of the sheet portion forming body 43A and the inner peripheral portion of the supply portion 69 are formed substantially flush with each other. The valve hole 57A formed by the inner peripheral portion of the seat portion forming body 43A is connected to the supply path 56A.

  The fixing member 26A is formed in a substantially cylindrical shape. The fixing member 26A has a male screw engraved in the middle in the axial direction, and is screwed into the fixing member screw recess 40A. The axis of the fixing member 26A substantially coincides with the reference axis L1. In the fixing member 26A, one end portion 49A on the X1 side in the axial direction abuts on the seat block holding portion 41A. The bottom portion 36 of the piston 28 is inserted through the fixing member 26A. The inner peripheral portion of the fixing member 26A and the outer peripheral portion of the bottom portion 36 of the piston 28 are spaced apart from each other in the radial direction. The insertion hole 71 formed by the inner peripheral portion of the fixing member 26A is continuous with the valve hole 57A and the pressure reducing valve space 58. The insertion hole 71 has two regions, a primary pressure chamber 62 formed radially inward from the orifice 47 and a secondary region 63A formed radially outward from the orifice 47 via the orifice 47. . The secondary side region 63 </ b> A continues to the pressure reducing valve space 58 and is included in the secondary pressure chamber 68 </ b> A together with the pressure reducing valve space 58, the piston flow path 60 and the space 38. The other end portion 72 in the axial direction of the sheet portion forming body 43A protrudes from the seat block holding portion 41A to the other X2 in the axial direction, and is fitted to the fixing member 26A. A substantially annular spring housing space 50A surrounded by the fixing member 26A, the outward flange portion 45A, and the seat block holding portion 41A is formed.

The spring receiving portion 44A is formed in a substantially annular shape. The spring receiving portion 44A is disposed in the spring storage space 50A. The spring receiving portion 44A is fitted on the seat portion forming body 43A, and the outer peripheral portion thereof abuts on the seat block holding portion 41A. In the spring receiving portion 44A, the surface portion 73 on the X1 side in the axial direction is in contact with the outward flange portion 45A of the sheet portion forming body 43A. The spring member 23 includes a first seat portion 53, a second seat portion 54, and an inclined portion 55. The spring member 23 is disposed in the spring accommodating space 50A so as to be elastically deformable. The first seat portion 53 abuts on the fixing member 26A, and an inner peripheral portion thereof is externally fitted to the seat portion forming body 43A. The second seating portion 54 is in contact with the spring receiving portion 44A. The spring member 23 via the spring receiving portion 44A, to grant a spring force to the sheet portion forming body 43A, in cooperation with the bottom 74 of the seat block retaining portion 41A, to clamp the seat portion forming body 43A. The axis of the spring receiving portion 44A and the spring member 23 substantially coincides with the reference axis L1. The valve passage 66A includes a supply path 56A, a valve hole 57A, an insertion hole 71, a pressure reducing valve space 58, and a discharge path 59. The housing 67A includes a pressure reducing valve housing 27, a seat block housing 25A, and a fixing member 26A.

  Below, operation | movement of 22 A of valve apparatuses is demonstrated. Similarly to the valve device 22A of the first related embodiment, the valve device 22A reduces the pressure of the fluid supplied from the primary port 64 that is an opening that opens to the outside of the supply passage 56A through the orifice 47, It flows down to the secondary pressure chamber 68 </ b> A and is discharged from the secondary port 65 through the discharge path 59.

Below, the effect which seat block 21A and valve device 22A show is explained. According to the seat block 21A of the present embodiment, the sheet portion forming body 43A has the spring member 23 in a state where the spring force in the axial direction X1 is granted, the bottom 74 of the spring member 23 and the seat block retaining portion 41A It is pinched by. Therefore, it is possible to suppress the displacement of the sheet portion forming body 43A with respect to the sheet block holding portion 41A due to the pressing force of the piston 28, and it is possible to suppress the displacement of the piston 28 with respect to the sheet portion forming body 43A. Thereby, it can suppress that the adhesiveness of the valve body piece 46 and the seat part formation body 43A falls.

  According to the seat block 21A of the present embodiment, the same effects as the seat block 21 of the first related embodiment relating to the present invention are exhibited. According to the valve device 22A of the present embodiment, the same effects as those of the valve device 22 of the first related embodiment related to the present invention can be obtained.

  FIG. 5 is an enlarged cross-sectional view showing a seat block 21B which is a second related embodiment relating to the present invention. The valve device 22B of the second related embodiment related to the present invention includes a pressure reducing valve portion 24, a seat block housing 25A, a seat block 21B, and a fixing member 26A. The valve device 22B is similar in configuration to the valve device 22A of the second embodiment. Accordingly, in the valve device 22B of the third related embodiment related to the present invention, only the points different from the valve device 22A of the second embodiment will be described with reference to FIG. The description is abbreviate | omitted and attached | subjected.

  The seat block 21B includes a seat portion forming body 43B, a spring receiving portion 44B, and a spring member 23. The sheet part forming body 43B is formed of, for example, rubber or synthetic resin. The sheet portion forming body 43B is generally formed in a cylindrical shape. The sheet part forming body 43B is inserted into the sheet block holding part 41A, and is disposed away from the bottom 74 of the sheet block holding part 41A in the other axial direction X2. A substantially cylindrical hole-like spring storage space 50B is formed between the seat portion forming body 43B and the bottom portion 74 of the seat block holding portion 41A. The fixing member 26A is screwed through the piston 28 into the fixing member screw recess 40A. The sheet portion forming body 43B comes into contact with the fixing member 26A to which the axial end portion 75 is screwed. In the seat portion forming body 43B, the piston 28 is seated, and the valve body piece 46 is disposed so as to be capable of being pressed against the seat portion forming body 43B. The valve body piece 46 forms a substantially annular orifice 47 in cooperation with the axial direction one end portion 75 of the seat portion forming body 43B. The axis of the sheet part forming body 43B substantially coincides with the reference axis L1. The sheet portion forming body 43B is held in a state where the outer peripheral portion achieves sealing. The inner peripheral part of the sheet part forming body 43B and the inner peripheral part of the supply part 69 are formed substantially flush.

  The spring receiving portion 44B is generally formed in an annular shape. A spring insertion piece 51 </ b> B is formed on the inner peripheral edge of the spring receiving portion 44 </ b> B so as to protrude in one axial direction X <b> 1 over the entire circumference. The spring receiving portion 44B is disposed in the spring storage space 50B, and the outer peripheral portion thereof is fitted into and inserted into the seat block holding portion 41A. The spring insertion piece 51B is separated from the bottom 74 of the seat block holding portion 41A in the other axial direction X2. The axis of the spring receiving portion 44B substantially coincides with the reference axis L1. In the spring receiving portion 44B, the surface portion 52B on the other X2 side in the axial direction abuts against the other end portion 76 in the axial direction of the sheet portion forming body 43B. The inner peripheral part of the spring receiving part 44B is formed substantially flush with the inner peripheral part of the sheet part forming body 43B and the inner peripheral part of the supply part 69. The valve hole 57B is formed by the inner peripheral portion of the seat portion forming body 43B and the inner peripheral portion of the spring receiving portion 44B, and continues to the supply path 56A through the spring storage space 50B. The valve hole 57 </ b> B continues to the insertion hole 71.

The spring member 23 includes a first seat portion 53, a second seat portion 54, and an inclined portion 55. The spring member 23 is disposed in the spring accommodating space 50B so as to be elastically deformable. The first seat portion 53 comes into contact with the spring receiving portion 44B, and the inner peripheral portion of the first seat portion 53 is externally fitted to the spring insertion piece 51B. The second seating portion 54 contacts the bottom 74 of the seat block holding portion 41A. The spring member 23 is housed by compressing the amount of deflection x from the natural length H, and biases the spring force F toward the other axial direction X2 to the seat portion forming body 43B via the spring receiving portion 44B. The spring member 23 urges the spring force to sandwich the sheet portion forming body 43B in cooperation with the fixing member 26A. The spring member 23 is disposed in the spring accommodating space 50B by energizing a spring force F larger than the pressing force applied to the seat portion forming body 43B from the piston 28 and the fluid. The spring receiving portion 44B and the spring member 23 are
The axis line substantially coincides with the reference axis line L1. The valve passage 66B includes a supply path 56A, a valve hole 57B, an insertion hole 71, a pressure reducing valve space 58, and a discharge path 59.

  Below, operation | movement of the valve apparatus 22B is demonstrated. Similar to the valve device 22A of the second embodiment, the valve device 22B allows the fluid supplied from the primary port 64, which is an opening opened to the outside of the supply path 56A, to pass through the orifice 47 and reduce the pressure. It flows down to the secondary pressure chamber 68 </ b> A and is discharged from the secondary port 65 through the discharge path 59.

  Below, the effect which seat block 21B and valve device 22B show is explained. According to the seat block 21B of the present embodiment, the seat portion forming body 43B is interposed between the fixing member 26A and the spring receiving portion 44B.

  According to the seat block 21B of the present embodiment, the same effects as those of the seat block 21 of the first related embodiment related to the present invention are exhibited. According to the valve device 22B of the present embodiment, the same effects as those of the valve device 22 of the first related embodiment related to the present invention can be obtained.

  FIG. 6 is a cross-sectional view showing a valve device 22C of a third related embodiment including a seat block 21C, which is a third related embodiment related to the present invention. FIG. 7 is an enlarged cross-sectional view showing a seat block 21C which is a third related embodiment related to the present invention. The valve device 22C is a valve device 22C that is interposed in the flow path, controls discharge of a fluid such as a supplied gas, and discharges the supplied fluid under reduced pressure. The valve device 22C includes a pressure reducing valve portion 24, a seat block housing 25C, a seat block 21C, and an on-off valve portion 77. The valve device 22C is configured based on a predetermined reference axis L2. One direction parallel to the reference axis L2 is referred to as one axial direction X3, and the other direction parallel to the reference axis L2 is referred to as the other axial direction X4.

  The pressure reducing valve portion 24 depressurizes and discharges the supplied fluid. The pressure reducing valve portion 24 has the same configuration as the pressure reducing valve portion 24 of the valve device 22 of the first related embodiment related to the present invention. Therefore, in the pressure reducing valve part 24, the same code | symbol is attached | subjected to the same structure and the description is abbreviate | omitted. The pressure reducing valve portion 24 is configured with a predetermined axis L3 as a reference, and is disposed so that the axis L3 substantially coincides with the reference axis L2. In the pressure reducing valve portion 24, the one axial direction X1 substantially coincides with the axial direction X3, and the other axial direction X2 substantially coincides with the axial direction X4.

  The seat block housing 25C is formed with a pressure reducing valve portion screwing concave portion 39C, an on-off valve portion screwing concave portion 78, and a seat block holding portion 41C. The pressure-reducing valve portion screwing recess 39C is formed on the other axial side X4 side of the seat block housing 25C and opens to the other axial direction X4. The pressure-reducing valve portion screwing recess 39C is formed along the reference axis L2. The pressure reducing valve portion screwing recess 39C has a female screw engraved on the inner peripheral portion thereof, and the opening end portion 27c is screwed thereon. The on-off valve portion screwing recess 78 is formed on the one X3 side in the axial direction of the seat block housing 25C and opens to one X3 in the axial direction. The on-off valve portion screwing recess 78 is formed along the reference axis L2. The on-off valve portion screwing recess 78 has a female screw formed on the inner periphery thereof. The seat block holding portion 41C communicates the pressure reducing valve portion screwing recess 39C and the opening / closing valve screwing recess 78.

  The seat block holding portion 41C is formed along the reference axis L2. The seat block holding portion 41C is formed with a smaller diameter than the pressure reducing valve portion screwing recess 39C and the on-off valve portion screwing recess 78. The seat block holding portion 41C is formed with an inward flange portion 42C for restricting the displacement of the seat block 21C in the other axial direction X4. The inward flange portion 42C is formed so as to protrude radially inward over the entire circumference in the opening on the other axial side X4 side. The seat block holding portion 41 </ b> C has an engagement recess 79 that is recessed outward in the radial direction over the entire circumference in the opening on the X3 side in the axial direction. The engaging recess 79 opens in one axial direction X3.

  The seat block 21 </ b> C includes a seat portion forming body 43 </ b> C, a seat block main body 80, a spring receiving portion 44 </ b> C, and a spring member 23. The sheet portion forming body 43C is formed of, for example, rubber or synthetic resin. The sheet portion forming body 43C is generally formed in a cylindrical shape, and an outward flange portion 45C protruding outward in the radial direction is formed at one axial end portion thereof. The seat portion forming body 43C is inserted into the seat block holding portion 41C in a state where the outward flange portion 45C is in contact with the inward flange portion 42C, and the piston 28 is disposed so as to be seated. The outward flange portion 45C is disposed on the one axial side X3 side. The seat portion forming body 43C is held in a state in which the outer peripheral portion of the outward flange portion 45C achieves sealing on the inner peripheral portion of the seat block holding portion 41C. The axis of the sheet portion forming body 43C substantially coincides with the reference axis L2. The valve body piece 46 presses the seat portion forming body 43C over the ring in a state where the piston 28 is seated on the seat portion forming body 43C. The valve body piece 46 forms a substantially annular orifice 47 in cooperation with the seat portion forming body 43C.

  The seat block main body 80 is generally formed in a cylindrical shape, and an outward flange portion 81 protruding outward in the radial direction over the entire circumferential direction is formed at one end in the axial direction. The seat block main body 80 is inserted into the seat block holding portion 41 </ b> C in a state where the outward flange portion 81 is engaged with the engaging recess 79. The outward flange portion 81 is disposed on the X3 side in the axial direction. The seat block main body 80 is disposed so as to be spaced apart from the seat portion forming body 43C in one axial direction X3. The seat block body 80 is held in a state in which the outer peripheral portion achieves sealing on the inner peripheral portion of the seat block holding portion 41C. The axis of the seat block body 80 substantially coincides with the reference axis L2. A substantially cylindrical hole-like spring storage space 50C surrounded by the seat block body 80, the seat portion forming body 43C, and the seat block holding portion 41C is formed.

  The spring receiving portion 44C is generally formed in an annular shape. A spring insertion piece 51 </ b> C is formed on the inner peripheral edge of the spring receiving portion 44 </ b> C so as to protrude in one axial direction X <b> 3 over the entire circumference. The spring receiving portion 44C is disposed in the spring storage space 50C, and the outer peripheral portion thereof is fitted into and inserted into the seat block holding portion 41C. The axis of the spring receiving portion 44C substantially coincides with the reference axis L2. In the spring receiving portion 44C, the surface portion 52C on the other X4 side in the axial direction is in contact with the outward flange portion 45C of the sheet portion forming body 43C.

  The spring member 23, which is an elastic member, includes a first seat portion 53, a second seat portion 54, and an inclined portion 55. The spring member 23 has the same configuration as that of the spring member 23 included in the seat block 21 of the first related embodiment related to the present invention, and the description thereof is omitted by attaching the same reference numerals. The spring member 23 is disposed in the spring accommodating space 50C so as to be elastically deformable. The first seating portion 53 abuts on the spring receiving portion 44C, and the inner peripheral portion thereof is fitted on the spring insertion piece 51C. The second seat portion 54 contacts the seat block body 80. The axis of the spring member 23 substantially coincides with the reference axis L2. The spring member 23 is stored by compressing the amount of deflection x from the natural length H, and biases the spring force F toward the other axial direction X4 to the seat portion forming body 43C via the spring receiving portion 44C. The spring member 23 urges this spring force and sandwiches the sheet portion forming body 43C in cooperation with the inward flange portion 42C. The spring member 23 is disposed in the spring accommodating space 50C by energizing a spring force F larger than the pressing force applied to the seat portion forming body 43C from the piston 28 and the fluid. The spring receiving portion 44C has a spring insertion piece 51C that allows the displacement of one side X3 and the other side X4 of the spring receiving portion 44C (hereinafter simply referred to as “axial direction X”) and the deformation of the spring member 23. The seat block body 80 is spaced apart from the seat block body 80. A valve hole 57C is formed by the inner peripheral portion of the seat portion forming body 43C, the inner peripheral portion of the spring receiving portion 44C, and the inner peripheral portion of the seat block body 80.

The on-off valve portion 77 includes an on-off valve housing 82, a coil 83, a fixed magnetic pole 84, and a nonmagnetic member 8.
5. A plunger 86 and an on-off valve spring member 87 are provided. The on-off valve portion 77 is configured with reference to a predetermined axis L4, and the axis L4 substantially coincides with the reference axis L2 of the valve device 22C. The on-off valve housing 82, the coil 83, the nonmagnetic member 85, the fixed magnetic pole 84, the plunger 86, and the on-off valve spring member 87 are arranged so that their axes substantially coincide with the reference axis L 2 of the on-off valve portion 77. ing. The on-off valve housing 82 includes a first on-off valve housing portion 82a, an inward flange 82b, a second on-off valve housing portion 82c, and a third on-off valve housing portion 82d. The first on-off valve housing portion 82a is formed in a substantially cylindrical shape with a bottom. The first on-off valve housing portion 82a has a bottom portion disposed on one side in the axial direction X3 side and an opening portion disposed on the other side in the axial direction X4. An inward flange 82b is formed at the opening of the first on-off valve housing portion 82a so as to protrude radially inward over the entire circumference. A substantially cylindrical second on-off valve housing portion 82c extending in the direction away from the first on-off valve housing portion 82a, that is, the other axial direction X4 is formed on the inner peripheral edge of the inward flange 82b.

  The second on-off valve housing portion 82 c has an external thread engraved on the outer periphery thereof and is screwed into the on-off valve portion screwing recess 78. A substantially cylindrical third on-off valve housing portion 82d extending in the direction away from the inward flange 82b, that is, the other in the axial direction X4 is formed on the inner peripheral edge portion of the second on-off valve housing portion 82c. The third on-off valve housing portion 82d presses the outward flange portion 81 of the seat block body 80 in a state where the second on-off valve housing portion 82c is screwed. The third on-off valve housing portion 82d clamps the outward flange portion 81 of the seat block body 80 in cooperation with the engagement recess 79.

  The coil 83 includes a substantially cylindrical coil bobbin 88 made of a ferromagnetic material and a winding 89 wound around the coil bobbin 88. The coil bobbin 88 is disposed in the first on-off valve housing portion 82a. The coil bobbin 88 is disposed such that one end in the axial direction thereof is in contact with the bottom of the first on-off valve housing portion 82a and the other end in the axial direction is in contact with the inward flange 82b.

  The fixed magnetic pole 84 is generally formed in a cylindrical shape, and an outward flange 90 is formed over the entire circumference in the end portion on the X3 side in the axial direction. Most of the fixed magnetic pole 84 is inserted into the coil bobbin 88, and a part of the outward flange 90 is inserted into and secured to the bottom of the first on-off valve housing portion 82a. A part of the outer peripheral portion of the outward flange 90 comes into contact with the inner peripheral portion of the coil bobbin 88. The nonmagnetic member 85 is made of a nonmagnetic material and is formed in a substantially cylindrical shape. The nonmagnetic member 85 is interposed between the remaining portion of the fixed magnetic pole 84 except the outward flange 90 and the inner peripheral portion of the coil bobbin 88. The nonmagnetic member 85 has one end in the axial direction abutting on the outward flange 90 and the other end in the axial direction abutting on the inward flange 82b. The nonmagnetic member 85 is formed substantially flush with the inner peripheral portion of the second on-off valve housing portion 82c.

  The plunger 86 is made of a ferromagnetic material and is generally formed in a cylindrical shape. The plunger 86 has an axial end 91 having a smaller diameter than the remaining portion. The plunger 86 is held by the inner peripheral portion of the second on-off valve housing portion 82c and the nonmagnetic member 85 so as to be slidable in the axial direction X. One end 91 in the axial direction of the plunger 86 projects from the second on-off valve housing portion 82c to the other in the axial direction X4, and is disposed inside the third on-off valve housing portion 82d. The outer peripheral portion of the one end 91 in the axial direction of the plunger 86 and the inner peripheral portion of the third on-off valve housing portion 82d are spaced apart from each other in the radial direction, and a substantially annular housing is interposed therebetween. A space 92 is formed. The plunger 86 is formed with a substantially annular on-off valve body 93 that projects from one end in the axial direction to the other X4 in the axial direction. A substantially annular seat member 94 is formed on the seat block body 80. The seat member 94 surrounds an opening that opens the valve hole 57C in one axial direction X3. The seat member 94 is disposed so that the on-off valve body piece 93 is in pressure contact and the plunger 86 can be seated.

  Between the plunger 86 and the fixed magnetic pole 84, there is an on-off valve spring member 87 that urges the plunger 86 with a spring force directed toward the other axial direction X4. When a drive current flows through the winding 89, the coil 83 applies an electromagnetic force against the spring force urged by the on-off valve spring member 87 to the plunger 86 to cause sliding displacement. The plunger 86 is seated on the sheet member 94 by a spring force in a state where no drive current flows through the coil 83, and is separated from the sheet member 94 by an electromagnetic force when the drive current flows through the coil 83.

  When the on-off valve portion 77 is screwed, the on-off valve portion screwing recess 78 has a substantially annular on-off valve surrounded by the third on-off valve housing portion 82d and the seat block housing 25C. A space 95 is formed. The seat block housing 25C is formed with a supply path 56C that allows the on-off valve space 95 to communicate with the outside. The third on-off valve housing portion 82d is formed with an on-off valve passage 96 that communicates the on-off valve space 95 and the housing space 92. The seat block housing 25C is formed with a discharge passage 59 that allows the pressure reducing valve space 58 to communicate with the outside. In the valve device 22C, the supply passage 56C, the on-off valve space 95, the on-off valve passage 96, the housing space 92, the valve hole 57C, the pressure reducing valve space 58, and the discharge passage 59 constitute a valve passage 66C. In the present embodiment, the housing 67C includes a pressure reducing valve housing 27, a seat block housing 25C, and an on-off valve housing 82.

  Below, operation | movement of 22 C of valve apparatuses formed in this way is demonstrated. When a drive current flows through the coil 83, the on-off valve portion 77 displaces the plunger 86 that is seated on the seat member 94 and closes the valve passage 66C in one axial direction X3, thereby opening the valve passage 66C. When the drive current flows through the coil 83, the fluid supplied to the supply path 56C flows down to the valve hole 57C through the on-off valve space 95, the on-off valve flow path 96, and the housing space 92. Further, the fluid flows down from the valve hole 57 </ b> C to the primary pressure chamber 62. As in the first related embodiment related to the present invention, the fluid flowing down to the primary pressure chamber 62 is reduced in pressure by passing through the orifice 47, flows down to the secondary pressure chamber 68, and is discharged from the discharge passage 59. The When the drive current flowing through the coil 83 is interrupted, the plunger 86 is seated on the seat member 94 and closes the valve passage 66C to prevent fluid from flowing down.

  Below, the effect which seat block 21C and valve device 22C show is explained. According to the seat block 21C of the present embodiment, a plurality of valve bodies, in the present embodiment, the piston 28 and the plunger 86 can be seated. Therefore, it can be used in the valve device 22C including the piston 28 and the plunger 86, and it is not necessary to provide the seat block 21C for each piston 28 and plunger 86, and the number of parts can be reduced. As a result, the manufacturing cost of the seat block 21C can be reduced.

  In the seat block 21C of the present embodiment, since the seat block body 80 is sandwiched between the third on-off valve housing portion 82d and the seat block housing 25C, the configuration of the seat block body 80 is simple and easy to install. is there. Thereby, the man-hour of the seat block 21C can be reduced, and the manufacturing cost of the seat block 21C can be reduced.

  According to the seat block 21C of the present embodiment, the same effects as those of the seat block 21 of the first related embodiment relating to the present invention are exhibited. According to the valve device 22C of the present embodiment, the same effects as those of the valve device 22 of the first related embodiment related to the present invention can be obtained.

  FIG. 8 is an enlarged cross-sectional view showing a seat block 21D which is a fourth related embodiment relating to the present invention. The valve device 22D of the fourth related embodiment includes a pressure reducing valve portion 24, a seat block housing 25D, a seat block 21D, a fixing member 26D, and an on-off valve portion 77. The valve device 22D is similar in configuration to the valve device 22C of the third related embodiment. Therefore, in the valve device 22D of the fourth related embodiment, only the points different from the valve device 22C of the third related embodiment will be described with reference to FIG. The description is omitted.

  The seat block housing 25D is formed with a pressure reducing valve portion screwing recess 39C, an on-off valve portion screwing recess 78, a seat block holding portion 41D, an inward flange portion 42C, and a fixing member holding recess 40D. . The seat block holding portion 41D is formed along the reference axis L2. The seat block holding portion 41D is formed with a smaller diameter than the pressure reducing valve portion screwing recess 39C. The seat block holding portion 41D is formed with an inward flange portion 42C that protrudes radially inward over the entire circumference in the opening on the other X4 side in the axial direction. The seat block holding portion 41D is formed with a fixing member holding recess 40D that is recessed radially outward over the entire circumference in the opening on the other end side in the axial direction on the X3 side. The fixing member holding recess 40D opens in one axial direction X3. The seat block housing 25D is provided with a supply path 56C that communicates the open / close valve space 95 and the outside, and a discharge path 59 that communicates the pressure reducing valve space 58 and the outside.

  The seat block 21D includes a seat portion forming body 43D, a spring receiving portion 44D, and a spring member 23. The sheet portion forming body 43D is formed of, for example, rubber or synthetic resin. The sheet portion forming body 43D is generally formed in a cylindrical shape, and an outward flange portion 45D protruding outward in the radial direction is formed at an axially intermediate portion thereof. The sheet portion forming body 43D is inserted through the sheet block holding portion 41D. In the seat portion forming body 43D, the piston 28 can be seated on the end portion 97 on the other axial direction X4 side, and the plunger 86 can be seated on the end portion 98 on the one axial side X3 side. The seat portion forming body 43D is held in a state in which the outer peripheral portion of the outward flange portion 45D achieves a seal on the inner peripheral portion of the seat block holding portion 41D. The outward flange portion 45D is disposed away from the inward flange portion 42C in one axial direction X3. Between the outward flange portion 45D and the inward flange portion 42C, a substantially annular spring storage space 50D surrounded by the seat portion forming body 43D and the seat block housing 25D is formed. The axis of the sheet portion forming body 43D substantially coincides with the reference axis L2. The seat portion forming body 43D forms a valve hole 57D by its inner peripheral portion.

  The valve body piece 46 presses the seat portion forming body 43D over the ring in a state where the piston 28 is seated on the seat portion forming body 43D. The valve body piece 46 forms a substantially annular orifice 47 in cooperation with the seat portion forming body 43D. In the state where the plunger 86 is seated on the seat portion forming body 43D, the on-off valve body piece 93 presses the seat portion forming body 43D over the ring and closes the valve passage 66D. The valve passage 66D includes a supply passage 56C, an on-off valve space 95, an on-off valve passage 96, a housing space 92, a valve hole 57D, a pressure reducing valve space 58, and a discharge passage 59.

  The fixing member 26D is formed in a substantially annular shape. The fixing member 26D is inserted through the fixing member holding recess 40D. The fixing member 26D is sandwiched between the third on-off valve housing portion 82d and the seat block holding portion 41D. In the fixing member 26D, an end portion 98 on the X3 side in the axial direction of the sheet portion forming body 43D is inserted through the inner peripheral portion. The surface portion 49D on the other X4 side in the axial direction of the fixing member 26D is in contact with the outward flange portion 45D.

  The spring receiving portion 44D is generally formed in an annular shape. The spring receiving portion 44D is disposed in the spring storage space 50D, and the outer peripheral portion thereof is fitted into and inserted into the seat block holding portion 41D. In the spring receiving portion 44D, the sheet portion forming body 43D is inserted in the inner peripheral portion, and the surface portion 73D on the X3 side in the axial direction is in contact with the outward flange portion 45D. The axis of the spring receiving portion 44D substantially coincides with the reference axis L2.

The spring member 23, which is an elastic member, includes a first seat portion 53, a second seat portion 54, and an inclined portion 55. The spring member 23 is disposed in the spring accommodating space 50D so as to be elastically deformable. The first seat portion 53 abuts on the inward flange portion 42C, and the seat portion forming body 43D is inserted through the inner peripheral portion thereof. The second seat portion 54 contacts the outward flange portion 45D. The axis of the spring member 23 substantially coincides with the reference axis L2. The spring member 23 is stored by compressing the amount of deflection x from the natural length H, and biases the spring force F toward the one side X3 in the axial direction to the seat portion forming body 43D via the spring receiving portion 44D. The spring member 23 biases this spring force, and clamps the sheet portion forming body 43D in cooperation with the fixing member 26D. The spring member 23 is disposed in the spring accommodating space 50D by energizing a spring force F larger than the pressing force applied to the seat portion forming body 43D from the plunger 86 and the fluid.

  The housing 67D includes a pressure reducing valve housing 27, a seat block housing 25D, an on-off valve housing 82, and a fixing member 26D.

  Below, operation | movement of valve apparatus 22D is demonstrated. Similar to the valve device 22C of the third related embodiment related to the present invention, when a drive current is passed through the coil 83, the fluid supplied to the supply path 56C is the on-off valve space 95, the on-off valve flow path 96, the housing space. It flows down to the primary pressure chamber 62 through 92 and the valve hole 57D. The fluid flowing down to the primary pressure chamber 62 is reduced in pressure by passing through the orifice 47, flows down to the secondary pressure chamber 68, and is discharged from the discharge path 59. When the drive current flowing through the coil 83 is interrupted, the plunger 86 is seated on the seat portion forming body 43D and closes the valve passage 66D to prevent fluid from flowing down.

  Below, the effect which seat block 21D and valve device 22D show is explained. According to the seat block 21D of the present embodiment, the spring member 23 applies a spring force greater than the pressing force applied to the seat portion forming body 43D from the plunger 86 and the fluid to the seat portion forming body 43D. Accordingly, the relative displacement of the sheet portion forming body 43D due to the plunger 86 and the pressing force of the fluid is suppressed. Therefore, the position shift of the plunger 86 with respect to the sheet part forming body 43D is suppressed, and a decrease in adhesion can be suppressed. By suppressing the decrease in adhesion, the valve passage 66D can be reliably closed.

  According to the seat block 21D of the present embodiment, since the sheet portion forming body 43D abuts on the fixing member 26D, the relative displacement of one X3 in the axial direction of the sheet portion forming body 43D is prevented. Therefore, relative displacement of the sheet portion forming body 43D by the pressing force urged by the piston 28 and the fluid can be suppressed. Therefore, the displacement of the piston 28 with respect to the sheet portion forming body 43D is suppressed, and it is possible to suppress a decrease in adhesion. By suppressing the decrease in the adhesion, it is possible to suppress the fluid from flowing from the primary pressure chamber 62 to the secondary pressure chamber 68 with the valve passage 66D closed.

  According to the seat block 21D of the present embodiment, the seat portion forming body 43D is inserted and the fixing member 26D is sandwiched between the third on-off valve housing portion 82d and the seat block holding portion 41D. Thus, the seat block 21D is mounted. Therefore, mounting is easy and man-hours can be reduced.

  According to the seat block 21D of the present embodiment, there are the same effects as the seat block 21C of the third related embodiment. According to the valve device 22D of the present embodiment, the same effects as those of the valve device 22C of the third related embodiment can be obtained.

  FIG. 9 is an enlarged cross-sectional view showing a seat block 21E which is a fifth related embodiment relating to the present invention. The valve device 22E of the fifth related embodiment includes a pressure reducing valve portion 24, a seat block housing 25D, a seat block 21E, a fixing member 26D, and an on-off valve portion 77. The valve device 22E is similar in configuration to the valve device 22D of the fourth related embodiment. Accordingly, in the valve device 22E of the fifth related embodiment, only the points different from the valve device 22D of the fourth related embodiment will be described with reference to FIGS. 6 and 8, and the same reference numerals will be used for the same configuration. A description thereof will be omitted.

  The seat block 21 </ b> E includes a first sheet portion forming body 99, a second sheet portion forming body 100, a first spring receiving portion 101, a second spring receiving portion 102, and a spring member 23. The first sheet portion forming body 99 is formed of, for example, rubber or synthetic resin. The first sheet portion forming body 99 is generally formed in a cylindrical shape, and a first outward flange portion 103 protruding outward in the radial direction is formed at one axial end portion thereof. The first seat portion forming body 99 is inserted into the seat block holding portion 41D in a state where the first outward flange portion 103 is in contact with the inward flange portion 42C, and the piston 28 is disposed so as to be seated. The first outward flange portion 103 is disposed on the one X3 side in the axial direction. The first sheet portion forming body 99 is held in a state where the outer peripheral portion of the first outward flange portion 103 achieves a seal on the inner peripheral portion of the seat block holding portion 41D. The axis of the first sheet portion forming body 99 substantially coincides with the reference axis L2. The valve body piece 46 presses the first seat portion forming body 99 over the ring in a state where the piston 28 is seated on the first seat portion forming body 99. The valve body piece 46 cooperates with the first sheet portion forming body 99 to form a substantially annular orifice 47.

  The second sheet portion forming body 100 is generally formed in a cylindrical shape, and a second outward flange portion 104 that protrudes radially outward is formed at one axial end portion thereof. In the second seat portion forming body 100, the second outward flange portion 104 is disposed on the other axial direction X4 side, is inserted through the seat block holding portion 41D, and the plunger 86 is disposed so as to be seated. The second sheet portion forming body 100 is held in a state where the outer peripheral portion of the second outward flange portion 104 achieves a seal on the inner peripheral portion of the seat block holding portion 41D. The axis of the second sheet part forming body 100 substantially coincides with the reference axis L2. The on-off valve body piece 93 presses the second seat portion forming body 100 over the ring while the plunger 86 is seated on the second seat portion forming body 100. The first sheet portion forming body 99 and the second sheet portion forming body 100 are disposed apart from each other in the axial direction X. Between the first sheet portion forming body 99 and the second sheet portion forming body 100, a spring housing space 50E having a substantially cylindrical hole shape is formed.

  The fixing member 26D is formed in a substantially annular shape. The fixing member 26D is inserted through the fixing member holding recess 40D. The fixing member 26D is sandwiched between the third on-off valve housing portion 82d and the seat block holding portion 41D. In the fixing member 26D, the end portion 105 on the X3 side in the axial direction of the second sheet portion forming body 100 is inserted through the inner peripheral portion. The surface portion 106 on the other axial side X4 side of the fixing member 26D is in contact with the second outward flange portion 104.

  The first spring receiving portion 101 is generally formed in an annular shape. A spring insertion piece 107 is formed on the inner peripheral edge of the first spring receiving portion 101 so as to protrude in one axial direction X3 over the entire circumference in the circumferential direction. The first spring receiving portion 101 is disposed in the spring accommodating space 50E, and the outer peripheral portion thereof is inserted into and inserted into the seat block holding portion 41D. The first spring receiving portion 101 has an axis that substantially coincides with the reference axis L2. In the first spring receiving portion 101, the surface portion 108 on the other X4 side in the axial direction abuts on the first outward flange portion 103. The second spring receiving portion 102 is formed in a substantially annular shape. The second spring receiving portion 102 is disposed in the spring storage space 50E, and the outer peripheral portion thereof is fitted into and inserted through the seat block holding portion 41D. The axis of the second spring receiving portion 102 substantially coincides with the reference axis L2. In the second spring receiving portion 102, the surface portion 109 on the X3 side in the axial direction abuts against the second outward flange portion 104. The first spring receiving portion 101 and the second spring receiving portion 102 are disposed apart from each other in the axial direction X.

The spring member 23, which is an elastic member, includes a first seat portion 53, a second seat portion 54, and an inclined portion 55. The spring member 23 is disposed in the spring accommodating space 50E so as to be elastically deformable. The first seat portion 53 abuts on the first spring receiving portion 101, and an inner peripheral portion thereof is externally fitted to the spring insertion piece 107. The second seat portion 54 contacts the second spring receiving portion 102. The axis of the spring member 23 substantially coincides with the reference axis L2. The spring member 23 is stored by compressing the amount of deflection x from the natural length H, and urges the first sheet portion forming body 99 with a spring force F toward the other axial direction X4 via the first spring receiving portion 101. The spring member 23 urges the second sheet portion forming body 100 with a spring force F toward the one axial direction X3 via the second spring receiving portion 102. The spring member 23 urges the spring force F, cooperates with the inward flange portion 42C, sandwiches the first sheet portion forming body 99, and cooperates with the fixing member 26D to form the second sheet portion forming body. 100 is pinched. The spring member 23 has a spring force F greater than the pressing force applied to the first sheet portion forming body 99 from the piston 28 and the fluid and the pressing force applied to the second sheet portion forming body 100 from the plunger 86 and the fluid. The first sheet portion forming body 99 and the second sheet portion forming body 100 are urged to be disposed in the spring accommodating space 50E.

  The inner peripheral portion of the first sheet portion forming body 99, the inner peripheral portion of the first spring receiving portion 101, the inner peripheral portion of the second spring receiving portion 102, and the inner peripheral portion of the second sheet portion forming body 100 are substantially flush. The valve hole 57E is formed by these. The valve passage 66E includes a supply passage 56C, an on-off valve space 95, an on-off valve passage 96, a housing space 92, a valve hole 57E, a pressure reducing valve space 58, and a discharge passage 59.

  Below, operation | movement of the valve apparatus 22E is demonstrated. As with the valve device 22D of the fourth related embodiment, when a drive current is passed through the coil 83, the fluid supplied to the supply path 56C is the on-off valve space 95, the on-off valve flow path 96, the housing space 92, and the valve hole 57E. And then flows down to the primary pressure chamber 62. The fluid flowing down to the primary pressure chamber 62 is reduced in pressure by passing through the orifice 47, flows down to the secondary pressure chamber 68, and is discharged from the discharge path 59. When the drive current flowing through the coil 83 is interrupted, the plunger 86 is seated on the second seat portion forming body 100 and closes the valve passage 66E to prevent fluid from flowing down.

  According to the seat block 21E of the present embodiment, since the first spring receiving portion 101 and the second spring receiving portion 102 are included, the spring member 23 is connected to the first sheet portion forming body 99 and the second sheet portion forming body 100. Uniform surface pressure due to the spring force can be applied to each. As a result, the contact between the first sheet portion forming body 99 and the second sheet portion forming body 100 can be suppressed.

  In the present embodiment, the spring member 23 is used as means for urging the spring force on the sheet portion forming bodies 43, 43A, 43B, 43C, 43D, the first sheet portion forming body 99 and the second sheet portion forming body 100. However, it is not limited to the spring member 23. For example, a winding 89 spring, a disc spring, a spring washer, a wave washer, and rubber may be used, and the sheet portion forming bodies 43, 43A, 43B, 43C, 43D, the first sheet portion forming body 99, and the second sheet portion forming body. Any member that can bias the elastic force to 100 may be used. The elastic force is based on the pressing force applied to the piston 28, the plunger 86, and the sheet portion forming bodies 43, 43A, 43B, 43C, 43D, the first sheet portion forming body 99, and the second sheet portion forming body 100 due to the fluid. It only needs to be set large. Further, the sheet portion forming bodies 43, 43A, 43B, 43C, 43D, the first sheet portion forming body 99, the second sheet portion forming body 100, and the sheet member 94 are not limited to resin materials and rubber. The sheet portion forming bodies 43, 43A, 43B, 43C, 43D, the first sheet portion forming body 99, the second sheet portion forming body 100, and the sheet member 94 are softer than the valve body piece 46 and the on-off valve body piece 93. What is necessary is just a sheet material made of copper, for example.

In the present embodiment, the valve devices 22, 22A and 22B are pressure reducing valve devices, but are not necessarily limited to this. For example, an on-off valve device may be used as long as the valve device is applied with a valve structure. In the spring member 23, the first seat 53 is disposed on the one side X3 in the axial direction and the second seat 54 is disposed on the other side X4 in the axial direction. Not. For example, the first seat portion 53 may be disposed on the other X4 side in the axial direction, and the second seat portion 54 may be disposed on the one X3 side in the axial direction, and the seat portion forming body 43D, the first seat portion forming body 99, and It is only necessary that the second sheet portion forming body 100 can be clamped in cooperation with the housing 67.

  In the present embodiment, the valve devices 22C, 22D, and 22E are provided with a pressure reducing valve portion and an on-off valve portion, but are not necessarily limited to such a configuration. Two pressure reducing valve portions may be provided, and two opening / closing valve portions may be provided. The number of valve bodies provided in the valve devices 22C, 22D, and 22E is not limited to two, and may be three or more, and a plurality of valve passages 66C, 66D, and 66E may be formed.

  Further, the spring member 23 and the spring receiving portion may be integrally formed. As a result, the surface pressure urging the sheet portion forming bodies 43, 43A, 43B, 43C, and 43D can be made more uniform. The spring member 23, the first spring receiving portion 101, and the second spring receiving portion 102 may be integrally formed.

The present invention can also be implemented in the following embodiments.
(1) a seat portion forming body that is provided in a housing in which a valve passage is formed and on which at least one valve body that opens and closes the valve passage is seated;
A seat block comprising: an elastic member that urges an elastic force to the seat portion forming body and clamps the sheet portion forming body in cooperation with the housing.

  The seat portion forming body on which at least one valve body that opens and closes the valve passage is seated is provided in a housing in which the valve passage is provided. The sheet portion forming body is sandwiched between the elastic member and the housing. As a result, the sheet portion forming body can be easily mounted, and the number of man-hours can be reduced as compared with the conventional seat block. That is, the sheet portion forming body is sandwiched in cooperation between the elastic member and the housing in a state where the elastic force is urged by the elastic member. Therefore, in the above-described embodiment, the bonding work as in the conventional first technique is not necessary, and the manufacturing cost can be reduced by reducing the number of steps. Since the sheet portion forming body is held in a state where the elastic force is urged, the relative displacement with respect to the housing can be suppressed and rattling can be suppressed even when the processing accuracy is low. Therefore, the adhesiveness of the sheet portion can be ensured without increasing the processing accuracy of the sheet portion forming body, and thus the manufacturing cost can be reduced.

  Moreover, since the relative displacement of the sheet part molded body with respect to the housing can be suppressed by the elastic force of the elastic member, the positional deviation of the sheet part formed body for each opening / closing operation as in the prior art can be suppressed. Thereby, the position shift of the valve body with respect to the seat block can be suppressed. Therefore, the adhesiveness between the valve body and the seat portion forming body is reduced, and the fluid can be prevented from leaking to the downstream side. The sheet portion forming body is clamped by an elastic force applied by an elastic member. Therefore, even if the seat block forming body and the housing are thermally contracted, the seat block keeps the elastic member urging and holding the elastic force to the seat forming body. In other words, the thermal contraction of the sheet portion forming body and the housing can be absorbed by the elastic member. As a result, rattling of the sheet portion forming body relative to the housing due to heat shrinkage can be suppressed. As described above, the number of man-hours can be reduced, and the valve block can be prevented from being displaced without being affected by the use conditions, and a seat block that can easily and reliably maintain the adhesion of the seat portion can be realized. .

  (2) The seat block is characterized in that the elastic member biases the seat portion forming body with an elastic force that resists the pressing force of the seated valve body or fluid.

  An elastic force that resists the pressing force by the valve body or fluid on which the elastic member is seated is urged to the seat portion forming body. Accordingly, when the valve body is seated on the seat portion forming body, the pressing force applied to the seat portion forming body can be resisted. Therefore, when the valve body is seated on the seat portion forming body, it is possible to suppress the relative displacement of the seat portion forming body with respect to the housing.

(3) The seat block, wherein the elastic member includes a spring member.
The elastic member includes a spring member. Accordingly, an elastic member that applies an elastic force to the sheet portion forming body can be realized.

  (4) The seat block is a non-linear spring member having a small spring constant and capable of obtaining a stable load against displacement.

  The spring member is a non-linear spring member having a small spring constant. Since the spring member has a small spring constant, the change in elastic force with respect to the amount of displacement is small. This makes it possible to impart a stable elastic force to the sheet portion forming body even when the processing accuracy of the component is low, or even when the sheet portion forming body is deformed.

It is sectional drawing which shows the valve apparatus 22 containing the seat block 21 which is 1st related embodiment relevant to this invention. 3 is an enlarged cross-sectional view showing a seat block 21 in an enlarged manner. FIG. 3 is a graph showing characteristics of a spring member 23. It is an expanded sectional view expanding and showing seat block 21A which is one embodiment of the present invention. It is an expanded sectional view expanding and showing seat block 21B which is the 2nd related embodiment relevant to the present invention. It is sectional drawing which shows the valve apparatus 22C containing the seat block 21C which is 3rd related embodiment relevant to this invention. It is an expanded sectional view expanding and showing seat block 21C which is the 3rd related embodiment relevant to the present invention. It is an expanded sectional view expanding and showing sheet block 21D which is the 4th related embodiment relevant to the present invention. It is an expanded sectional view expanding and showing seat block 21E which is the 5th related embodiment relevant to the present invention. It is sectional drawing which shows the pressure-reduction valve 2 containing the seat part 1 of the conventional 1st technique. It is an expanded sectional view which expands and shows sheet part 1. It is an expanded sectional view expanding and showing sheet part 1 of the conventional 2nd technique. It is an expanded sectional view which expands and shows the sheet | seat part 1 of the conventional 3rd technique.

Explanation of symbols

21 Seat Block 22 Valve Device 23 Spring Member 28 Piston 43 Seat Part Forming Body 66 Valve Passage 67 Housing 86 Plunger

Claims (3)

A valve passage is formed that is closed when the valve body is displaced and seated in a first direction along a predetermined axis, and is opened when the valve body is displaced from the seated state in a second direction along the axis. A housing,
A sheet portion forming body provided in the housing in a state in which displacement in the first direction along the axis is prevented;
An elastic member provided in the housing, having a non-linear spring characteristic, and pressing the sheet portion forming body in a first direction along the axis;
A spring receiving part interposed between the sheet part forming body and the elastic member and contacting the elastic member and the sheet part forming body ;
A fixed member that is fixed in the housing so as to abut against the elastic member and has an insertion hole through which the valve element is inserted ;
The sheet portion forming body is formed with a portion protruding in the second direction along the axis and inserted through the elastic member ,
Sheet block the valve body, characterized that you seated into the first direction along the axis of the seat portion forming body.   The seat block according to claim 1, wherein the elastic member is a non-linear spring member that has a stable spring force with respect to displacement in a direction along the axis and has a small spring constant.   A valve device comprising the seat block according to claim 1.

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