JP5249191B2 - solenoid valve - Google Patents

Description

  The present invention relates to a solenoid valve.

  In general, there is an electromagnetic valve described in Patent Document 1, for example. As shown in FIG. 10, the poppet type directional switching valve 80 of Patent Document 1 includes a main valve portion 81 for switching an air flow path and a solenoid portion 82 for driving a valve.

  The main valve portion 81 includes a main valve portion main body (body) 83 having a substantially rectangular parallelepiped shape, and a through hole 84 is formed in the main valve portion main body 83 along the longitudinal direction thereof. A poppet valve (valve element) 85 is accommodated in the center of the through hole 84. Further, both end sides of the through hole 84 are screw holes 84a in which screws are formed.

  At both ends of the through hole 84, valve seat bodies 86 are provided so as to sandwich the poppet valve 85. The distal end portion of the valve seat body 86 is a valve seat 86a to which the poppet valve 85 contacts and separates. In addition, a screw 86b is formed on the outer peripheral surface of the valve seat body 86, and the valve seat body 86 is disposed at both ends of the through hole 84 by screwing the screw 86b into the screw hole 84a. . A seal body 87 is disposed between the outer peripheral surface of the valve seat body 86 and the inner peripheral surface of the through hole 84, and the seal body 87 provides a seal between the valve seat body 86 and the through hole 84. Has been.

JP 2006-258183 A

  By the way, in the poppet type direction switching valve 80 of Patent Document 1, for example, the valve seat 86 is bonded to the through hole 84 by bonding the valve seat 86 and the through hole 84 with an adhesive (anti-rotation material). May be locked. As described above, when the valve seat body 86 is prevented from rotating with respect to the through hole 84 using an adhesive, the valve seat body 86 is screwed into the screw hole 84a in a state where the adhesive is previously applied to the screw 86b. . The screw 86b and the screw hole 84a are bonded with an adhesive, so that the valve seat body 86 is fixed to the through hole 84 and the valve seat body 86 is prevented from rotating with respect to the through hole 84. Become.

  However, when the valve seat body 86 is screwed into the screw hole 84a in a state where the adhesive is preliminarily applied to the screw 86b, the adhesive is pushed and pushed out by the screwing of the valve seat body 86, and the screw 86b and the screw. It may protrude from between the holes 84a. In such a case, the adhesive adheres to the valve seat 86a and the seal body 87, and the poppet valve 85 adheres to the valve seat 86a by the adhesive, or the valve seat body 86 and the through hole 84 formed by the seal body 87 There is a risk that the sealing performance between the two may deteriorate.

  The present invention has been made paying attention to such problems existing in the prior art, and its purpose is to prevent rotation after screwing the valve seat body into the through-hole. An object of the present invention is to provide an electromagnetic valve that can prevent a problem from occurring when the operation is performed.

In order to achieve the above object, the invention according to claim 1 is directed to a through hole formed in a body of a main valve portion, a valve body accommodated in the through hole, and a tip attached to the through hole A valve seat having a side accommodated in the body, a valve seat that contacts and separates the valve body at a distal end side thereof, and a valve seat body that closes the through-hole by a proximal end side. The through-hole is formed with a female screw, and the valve seat body is formed with a male screw that can be screwed with the female screw, and the valve seat body is provided with the male screw at a position facing the female screw. a recess formed by recessing is formed, the recess, around the valve seat body is fixed to the female screw the adhesive faces the inner surface of the recess by being injected as detent material in recess fasten one end of the recess, it is opened from the base end face of the valve seat body Ri, the recess is directed to subject matter that also functions as the through-hole the valve seat body can be inserted a tool used to screw forward and backward a tool insertion opening with respect.

The gist of the invention of claim 2 is that, in the invention of claim 1 , a plurality of the recesses are formed at equal intervals along the circumferential direction of the male screw.

  According to the present invention, it is possible to prevent the valve seat body from being rotated after being screwed into the through hole, and it is possible to prevent a problem from occurring when the rotation is stopped.

The longitudinal cross-sectional view which shows the solenoid valve in 1st Embodiment. (A) is a side view of a valve seat body, (b) is a front view of a valve seat body. The front view of a solenoid valve. The fragmentary sectional view which shows the solenoid valve in 2nd Embodiment. The front view of a solenoid valve. (A) is a front view of a valve seat body, (b) is the sectional view on the AA line in (a). The longitudinal cross-sectional view which shows the valve seat body in another embodiment. The longitudinal cross-sectional view which shows the valve seat body in another embodiment. The fragmentary sectional view which expanded the internal thread and groove | channel in another embodiment. The fragmentary sectional view which shows the poppet type direction switching valve as a solenoid valve in a prior art example.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the electromagnetic valve 10 includes a main valve portion 11 having a valve body 21 for switching an air flow path, and a solenoid portion 31 for driving the valve body 21.

First, the main valve part 11 will be described.
The main valve portion 11 includes a long cylindrical body 12 made of a nonmagnetic material (made of a synthetic resin material), and a through-hole 12a is formed in the body 12 from one end to the other end in the longitudinal direction. ing. Further, on one side surface of the body 12, a supply port 13, an output port 14, and a discharge port 15 are formed in this order from one end of the body 12 in the longitudinal direction to the other end. It is opened toward the through hole 12a. Positive pressure air is supplied to the supply port 13 from a positive pressure supply source (not shown), and the output port 14 is connected to a pneumatic device (not shown) such as an air cylinder. The exhaust port 15 is connected to an exhaust pipe (not shown).

  A female screw 12b is formed at an opening on one end side of the through hole 12a, and one end of the through hole 12a is sealed by attaching a bottomed cylindrical valve seat body 41 thereto. The valve seat body 41 includes a manual shaft 41a that seals one end of the through hole 12a on the base end side, and extends in a cylindrical shape from the peripheral portion of the manual shaft 41a along the axial direction of the valve seat body 41. A portion 41b is provided. The extending portion 41 b is accommodated in the body 12 and provided so that its tip extends to the periphery of the opening to the through hole 12 a in the output port 14. The space between the through hole 12 a and the valve seat body 41 is sealed with an O-ring 17.

  In the extending portion 41b, a communication hole 41c is formed at a position where it overlaps with the supply port 13, and the supply port 13 and the valve seat body 41 communicate with each other via the communication hole 41c. Further, the supply valve seat 18 is formed at the distal end of the extending portion 41b so as to surround the through hole 12a. Further, in the body 12, a discharge valve seat 19 is formed on an end surface surrounding the through hole 12 a between the output port 14 and the discharge port 15 so as to face the supply valve seat 18. A valve chamber 20 is defined in a space located between the supply valve seat 18 and the discharge valve seat 19 and on the output port 14. The valve seat body 41 and the valve chamber 20 communicate with each other.

  A valve body 21 is accommodated in the valve chamber 20, and the valve body 21 can be brought into contact with and separated from the supply valve seat 18 and the discharge valve seat 19. The valve body 21 is fitted on the outer peripheral surface of a cylindrical rod 22 inserted into the through hole 12 a and is provided integrally with the rod 22. A projecting portion 22 a projecting outward is formed on one end side of the rod 22, and one end side of the rod 22 is inserted into the valve seat body 41 so that the projecting portion 22 a is located in the valve seat body 41. Yes. A valve return spring 23 is interposed between the protrusion 22 a and the manual shaft 41 a of the valve seat 41. The valve body 21 is biased in a direction away from the supply valve seat 18 by the spring force of the valve return spring 23.

  When the valve body 21 is moved away from the supply valve seat 18 by the spring force of the valve return spring 23, the valve body 21 is seated on the discharge valve seat 19, and the supply port 13 and the output port 14 are connected to the communication hole. 41c, the valve seat body 41 and the valve chamber 20 communicate with each other, and positive pressure air is supplied from the output port 14 to the pneumatic equipment. When the valve body 21 moves in a direction away from the discharge valve seat 19 against the spring force of the valve return spring 23, the valve body 21 is seated on the supply valve seat 18, and the output port 14, the discharge port 15, Are communicated via the valve chamber 20 and the through hole 12a, and the air discharged from the pneumatic device to the output port 14 is discharged from the discharge port 15.

Next, the solenoid unit 31 will be described.
The solenoid unit 31 includes a magnetic cover 32 made of a magnetic material, and one end of the magnetic cover 32 is joined to the other end of the body 12. An insertion hole 32 a is formed at the other end of the magnetic cover 32. Inside the magnetic cover 32, a cylindrical bobbin 33 around which a plurality of coils 33a are wound is disposed. A guide ring 34 is provided inside the magnetic cover 32 and closer to the body 12 than the bobbin 33, and the bobbin 33 and the guide are provided between the other inner surface of the magnetic cover 32 and the other end surface of the body 12. A ring 34 is sandwiched.

  A substantially cylindrical fixed iron core 37 is provided in the bobbin 33. One end surface of the fixed iron core 37 is a magnetic pole surface. Further, a substantially cylindrical movable iron core 35 is inserted into the guide ring 34 and the bobbin 33. The movable iron core 35 is disposed so that one end surface thereof is in contact with the other end surface of the rod 22 and the other end surface is opposed to the magnetic pole surface of the fixed iron core 37. Furthermore, one end side of the movable iron core 35 extends so as to enter the other end side of the through hole 12a, and a flange portion 35a protruding outward is formed at one end of the movable iron core 35. An iron core return spring 36 is interposed between the guide ring 34 and the flange portion 35a, and the movable iron core 35 is biased in a direction away from the fixed iron core 37 by the spring force of the iron core return spring 36.

Next, in the valve seat body 41, the structure for attaching the valve seat body 41 to the opening part of the one end side in the through-hole 12a is demonstrated in detail.
As shown in FIG. 2A, a male screw 42 a is formed on the outer peripheral surface on the manual shaft 41 a side that is the base end side of the valve seat body 41. The male screw 42a can be screwed with the female screw 12b of the through hole 12a. Further, on the outer peripheral surface of the valve seat body 41, a mounting recess 43 to which the O-ring 17 can be mounted is formed over the entire circumference on the tip side of the male screw 42a in the axial direction.

  Further, the male screw 42 a is formed with four grooves 44 as recesses extending along the axial direction of the valve seat body 41 by recessing the male screw 42 a at equal intervals in the circumferential direction of the valve seat body 41. One end of the groove 44 is opened in the base end surface of the valve seat body 41, and the other end is opened from the male screw 42a. Therefore, the groove 44 is formed so as to penetrate from one end to the other end of the male screw 42a. On the outer peripheral surface of the valve seat body 41 on the manual shaft 41a side, the region where the groove 44 is formed is smaller than the region where the male screw 42a is formed. Therefore, in the outer peripheral surface of the valve seat body 41 on the manual shaft 41a side, the male screw 42a has the female screw 12b as compared with the case where the region where the groove 44 is formed is larger than the region where the male screw 42a is formed. The screwing area for screwing is sufficiently secured.

  As shown in FIG. 2B, the valve seat body 41 has two tool insertion holes 45 into which a tool (not shown) used for screwing the valve seat body 41 back and forth with respect to the through hole 12a can be inserted. Is formed. The tool insertion hole 45 is formed so as to extend along the axial direction from the base end surface of the valve seat body 41, and is open to the base end surface of the valve seat body 41.

  The valve seat body 41 configured as described above is inserted from the distal end side into one end side of the through hole 12a, and the valve seat body 41 is screwed with respect to the female screw 12b while the male screw 42a and the female screw 12b are screwed together. Let me. Then, the valve seat body 41 is screwed into the female screw 12b until the valve stroke length at which the valve body 21 contacts and separates from the supply valve seat 18 becomes a desired valve stroke length. In a state where the male screw 42 a and the female screw 12 b are screwed together, the female screw 12 b enters the groove 44, and the female screw 12 b can be visually recognized from the opening of the groove 44. Then, when the valve stroke length reaches a desired valve stroke length, an adhesive S as a detent material is injected into the groove 44. Then, as shown in FIG. 3, the inner surface of the groove 44 and the female screw 12b are bonded by the adhesive S, and the valve seat body 41 is prevented from rotating with respect to the through hole 12a.

In the above embodiment, the following effects can be obtained.
(1) A groove 44 extending along the axial direction of the valve seat 41 is formed in the male screw 42a of the valve seat 41 by denting the male screw 42a. When the male screw 42a of the valve seat body 41 is screwed into the female screw 12b of the through hole 12a, the female screw 12b of the through hole 12a enters the groove 44. In this state, when the adhesive S is injected into the groove 44 from the opening of the groove 44, the inner surface of the groove 44 and the female screw 12b can be bonded by the adhesive S, and the valve seat body 41 is screwed into the through hole 12a. After that, the rotation can be prevented by the adhesive S. Further, when the adhesive S is injected into the groove 44, the valve seat 41 has already been screwed into a desired position, so that even if the adhesive S is injected into the groove 44, the screw of the valve seat 41 is not screwed. The adhesive S is not pushed out in the screwing direction as it advances. Therefore, it is possible to prevent the adhesive S from adhering to the O-ring 17 and the supply valve seat 18 at the tip of the valve seat body 41 in the screwing direction, and to prevent the occurrence of problems due to the adhesive S. Can do.

  (2) Four grooves 44 are formed at equal intervals in the circumferential direction of the male screw 42a. Therefore, it is possible to prevent the valve seat body 41 from being rotated by the adhesive S at four locations spaced at equal intervals in the circumferential direction of the male screw 42a. For this reason, the valve seat body 41 can be adhered in a balanced manner in the circumferential direction of the through hole 12a without the valve seat body 41 being inclined to a certain position with respect to the through hole 12a and the valve seat body 41 being inclined. it can.

  (3) When attaching the valve seat body 41 to the through-hole 12a, the rotation of the valve seat body 41 by the adhesive S is performed after the valve seat body 41 is screwed back and forth with respect to the female screw 12b. Therefore, the position of the valve seat body 41 in the through hole 12a can be finely adjusted before the rotation prevention by the adhesive S is performed, and the valve stroke in which the valve body 21 contacts and separates from the supply valve seat 18 is achieved. The length can be adjusted to the desired valve stroke length.

  (4) The groove 44 is formed by recessing the male screw 42a. For this reason, even in a state where the male screw 42 a and the female screw 12 b are screwed together, a space in which the adhesive S can be injected into the groove 44 can be secured. Therefore, even if the adhesive S is injected into the groove 44, it is possible to prevent the adhesive S from overflowing to the base end surface of the valve seat body 41 and the appearance of the valve seat body 41 from being deteriorated.

  (5) The male screw 42a of the valve seat body 41 is recessed to form the groove 44, and the adhesive S is injected into the groove 44 to prevent the valve seat body 41 from rotating with respect to the through hole 12a. Can do. Therefore, for example, compared with the case where the valve seat body 41 is prevented from rotating using screws, the valve seat body 41 can be prevented from rotating relative to the through hole 12a without applying an external force to the valve seat body 41. Therefore, after adjusting the position of the valve seat body 41 so that the valve stroke length becomes a desired valve stroke length, when the valve seat body 41 is prevented from rotating with respect to the through hole 12a, the external force of the valve seat body 41 is reduced. The valve seat body 41 can be prevented from rotating with respect to the through hole 12a without being displaced.

  (6) After the valve seat body 41 is screwed into the female screw 12b, the valve stroke length is adjusted and the seal between the valve seat body 41 and the through hole 12a is inspected, and then the groove 44 is used. The valve seat 41 can be prevented from rotating by the adhesive S. Therefore, when a defect is found during the inspection, the valve seat body 41 can be removed from the through hole 12a, and repair of the defective portion or replacement of the valve seat body 41 can be easily performed.

(Second Embodiment)
Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. In the embodiment described below, the same components as those in the first embodiment described above are denoted by the same reference numerals, and the redundant description thereof is omitted or simplified.

  As shown in FIG. 4, in a state where the male screw 42a and the female screw 12b are screwed together, the base end side of the valve seat body 41 is exposed outwardly from an opening on one end side of the through hole 12a. It has become. Further, as shown in FIGS. 6A and 6B, the male screw 42 a is formed with a notch 51 as a concave portion extending by denting the male screw 42 a along the axial direction of the valve seat body 41. One end of the notch 51 is closed inside the valve seat body 41, and the other end is opened from the male screw 42a. The valve seat body 41 is formed with a communication passage 52 that connects the tool insertion hole 45 and the notch 51.

  As shown in FIG. 5, a flow rate adjustment reference scale 55a is provided above the central portion of the other end surface of the body 12, and is spaced at a predetermined angle with respect to the flow rate adjustment reference scale 55a. Two flow rate adjustment marks 55b are provided so as to spread on both the left and right sides.

  The valve seat body 41 configured as described above is inserted from the distal end side into one end side of the through hole 12a, and the valve seat body 41 is screwed with respect to the female screw 12b while the male screw 42a and the female screw 12b are screwed together. Let Then, the flow rate of the positive pressure air supplied from the output port 14 to the pneumatic device is measured using a flow rate measuring unit (not shown), and the screw seat 41 is stopped from screwing when the flow rate reaches a desired flow rate.

  When it is confirmed that the flow rate has reached the desired flow rate, the nut 58 is screwed from the proximal end of the valve seat body 41 to the other end surface of the body 12 with respect to the male screw 42a, and the nut 58 penetrates the valve seat body 41. Temporary locking is performed with respect to the hole 12a. Further, the adhesive S is injected into the tool insertion hole 45. Then, the adhesive S injected into the tool insertion hole 45 flows into the notch 51 through the communication passage 52 and accumulates in the notch 51, and the tool insertion hole 45 is blocked by the adhesive S. It becomes a state. The inner surface of the notch 51 and the female screw 12b are bonded to each other by the adhesive S accumulated in the notch 51, and the valve seat body 41 is prevented from rotating to the through hole 12a.

  In this state, the immortal ink 56 is printed on a portion of the base end surface of the valve seat body 41 facing the flow rate adjustment reference scale 55a. Therefore, the flow rate of the positive pressure air supplied from the output port 14 to the pneumatic device is desired by finely adjusting the position of the valve seat body 41 so that the immortal ink 56 is positioned opposite the flow rate adjustment reference scale 55a. The valve stroke can be adjusted to achieve a flow rate of.

Therefore, according to the second embodiment, in addition to the effects (1) and (2) of the first embodiment, the following effects can be obtained.
(7) The tool insertion hole 45 and the notch 51 communicate with each other through the communication path 52, and the adhesive S injected into the tool insertion hole 45 flows into the notch 51 through the communication path 52. The adhesive S is attached to the inner surface of the notch 51 and the female screw 12b, and the valve seat body 41 is prevented from rotating with respect to the through hole 12a. Therefore, the tool insertion hole 45 can function as an inlet for injecting the adhesive S into the notch 51, and the tool insertion hole 45 can be closed by the adhesive S.

  (8) On the other end surface of the body 12, a flow rate adjustment reference scale 55a and a flow rate adjustment scale 55b are provided. Then, the flow rate of the positive pressure air supplied from the output port 14 to the pneumatic device is measured using the flow rate measuring means, and the screwing of the valve seat body 41 is stopped when the flow rate reaches a desired flow rate. The immortal ink 56 is printed on a portion of the base end face of the valve seat body 41 facing the flow rate adjustment reference scale 55a. Therefore, the flow rate of the positive pressure air supplied from the output port 14 to the pneumatic device is desired by finely adjusting the position of the valve seat body 41 so that the immortal ink 56 is positioned opposite the flow rate adjustment reference scale 55a. The valve stroke can be adjusted to achieve a flow rate of.

  (9) With the valve stroke length set to the desired valve stroke length, the nut 58 is screwed from the base end of the valve seat body 41 to the other end surface of the body 12 with respect to the male screw 42a. The seat body 41 is temporarily prevented from rotating with respect to the through hole 12a. Therefore, when performing the operation | work which inject | pours the adhesive agent S in the tool insertion hole 45, it can suppress that a valve stroke length shifts | deviates from desired valve stroke length.

In addition, you may change the said embodiment as follows.
In the first embodiment, as shown in FIG. 7, a communication passage 46 that connects the tool insertion hole 45 and the groove 44 is formed in the valve seat body 41 to connect the tool insertion hole 45 and the groove 44. You may communicate through the channel | path 46. FIG. Then, the male screw 42a of the valve seat body 41 and the female screw 12b of the through hole 12a are screwed together, and the adhesive S is injected into the tool insertion hole 45 when the valve stroke length reaches a desired valve stroke length. . Then, the adhesive S injected into the tool insertion hole 45 flows into the groove 44 through the communication path 46 and accumulates in the groove 44, and the tool insertion hole 45 is blocked by the adhesive S. It will be in the state. According to this, the tool insertion hole 45 can function as an inlet for injecting the adhesive S into the groove 44, and the tool insertion hole 45 can be closed by the adhesive S. it can. Further, in this case, one end of the groove 44 may not be opened from the base end surface of the valve seat body 41.

  In each of the above embodiments, as shown in FIG. 8, the groove 44 or the notch 51 is deleted, and the male screw 42 a is formed with a communication hole 47 as a recess extending along a direction orthogonal to the axial direction of the valve seat body 41. However, the communication hole 47 and the tool insertion hole 45 may be communicated. The adhesive S injected into the tool insertion hole 45 flows into the communication hole 47 and accumulates in the communication hole 47. Thereby, the inner surface of the communication hole 47 and the female screw 12b are bonded, and the valve seat body 41 can be prevented from rotating with respect to the through hole 12a.

  In each of the above embodiments, in order to prevent the valve seat body 41 from rotating, the adhesive S as the rotation preventing material is injected into the groove 44 or the cutout 51, but this is not restrictive. For example, as shown in FIG. 9, when the female screw 12b is made of a resin material, the female screw 12b facing the inner surface of the groove 44 is thermally deformed to project the convex portion 48 (in FIG. 9, a hatched line in the groove 44). And the convex portion 48 and the groove 44 are engaged with each other. Then, the valve seat body 41 may be prevented from rotating with respect to the through hole 12a by the base end portion 48a of the convex portion 48 and the inner surface of the groove 44 coming into contact with each other.

  In each of the above embodiments, in order to prevent the valve seat body 41 from rotating, the adhesive S as the rotation preventing material is injected into the groove 44 or the cutout 51, but this is not restrictive. For example, the crest of the female screw 12b facing the groove 44 or the inner surface of the notch 51 is crushed so that the male screw 42a cannot be moved back and forth with respect to the female screw 12b, and the valve seat body 41 is prevented from rotating with respect to the through hole 12a. May be.

  In each of the above embodiments, the adhesive S is used as the anti-rotation material. However, the present invention is not limited to this. For example, solder may be used as the anti-rotation material. The valve seat body 41 may be prevented from rotating by soldering to the female screw 12b of the through hole 12a.

  In each of the above embodiments, the adhesive S is used as the anti-rotation material. However, the present invention is not limited to this. For example, a resin may be used as the anti-rotation material, and the molten resin is poured into the groove 44 and cured. The valve seat body 41 may be prevented from rotating by joining the inner surface of the groove 44 and the female screw 12b of the through hole 12a with resin.

  In the above embodiments, four grooves 44 or notches 51 are formed at equal intervals in the circumferential direction of the male screw 42a. However, the present invention is not limited to this, and each groove 44 or each notch 51 is formed with respect to the male screw 42a. The position to be made may not be a position at equal intervals in the circumferential direction of the male screw 42a.

  In the above embodiments, four grooves 44 or notches 51 are formed in the circumferential direction of the male screw 42a. However, the present invention is not limited thereto, and only one groove 44 or notch 51 may be formed in the male screw 42a.

  In each of the above embodiments, four grooves 44 or notches 51 are formed at equal intervals in the circumferential direction of the male screw 42a. However, the present invention is not limited to this. For example, two grooves 44 or notches 51 are spaced at equal intervals in the circumferential direction of the male screw 42a. One, three, or five or more may be formed.

  In each of the above embodiments, the region where the groove 44 or the notch 51 is formed on the outer peripheral surface of the valve seat body 41 on the manual shaft 41a side is smaller than the region where the male screw 42a is formed. Not only this but the area | region in which the groove | channel 44 or the notch 51 is formed may be larger than the area | region in which the external thread 42a is formed. According to this, compared with the case where the region where the groove 44 or the notch 51 is formed is smaller than the region where the male screw 42a is formed on the outer peripheral surface of the valve seat body 41 on the manual shaft 41a side, The screwing area where the male screw 42a is screwed with the female screw 12b is reduced. Therefore, when the valve seat body 41 is screwed with respect to the female screw 12b, the valve seat body 41 can be screwed with respect to the female screw 12b while holding back, and the valve seat body 41 is inserted into the through hole 12a. The valve seat body 41 can be screwed with respect to the female screw 12b while being adjusted to be parallel to the direction along the axial direction.

  In the first embodiment, the tool insertion hole 45 may be deleted and the groove 44 may be used as a tool insertion port. According to this, the groove 44 functions as a space for injecting the adhesive S, but inserts a tool that can be used to insert a tool used for screwing the valve seat body 41 back and forth with respect to the through hole 12a. It can also function as a mouth. Therefore, it is not necessary to separately form the tool insertion hole 45 in the valve seat body 41, and the valve seat body 41 can be easily manufactured as compared with the case where the tool insertion hole 45 is separately formed in the valve seat body 41. it can.

  In the first embodiment, the groove 44 is formed so as to penetrate from one end of the male screw 42a to the other end. However, the present invention is not limited thereto, and for example, one end of the groove 44 is formed on the base end surface of the valve seat body 41. While opening, the other end may be located in the male screw 42a without penetrating the male screw 42a. According to this, since the groove 44 is closed before the mounting recess 43 without extending into the mounting recess 43, the adhesive S injected into the groove 44 does not enter the mounting recess 43. It can be in a state of accumulating inside.

  In the second embodiment, the valve seat body 41 is temporarily stopped with respect to the through-hole 12a by the nut 58 and then temporarily locked by the adhesive S. However, the present invention is not limited to this. May be fixed to the through hole 12a. In this case, it is not necessary to form the notch 51 in the male screw 42a, and it is not necessary to inject the adhesive S into the tool insertion hole 45.

Next, the technical idea that can be grasped from the above embodiment and other examples will be described below.
(A) The concave portion also functions as a tool insertion port into which a tool used for screwing the valve seat body back and forth with respect to the through hole can be inserted. The solenoid valve according to any one of the above.

  (B) One end of the concave portion is opened in the base end surface of the valve seat body, and the other end is located in the male screw, and the technical idea (I) ) The solenoid valve according to any one of

  DESCRIPTION OF SYMBOLS S ... Adhesive as anti-rotation material, 10 ... Solenoid valve, 11 ... Main valve part, 12 ... Body, 12a ... Through-hole, 12b ... Female screw, 18 ... Supply valve seat, 21 ... Valve body, 41 ... Valve seat body 42a ... male screw, 44 ... groove as a recess, 45 ... insertion hole for tool, 46, 52 ... communication passage, 47 ... communication hole as a recess, 48 ... projection, 51 ... notch as a recess.

Claims (2)

A through hole formed in the body of the main valve,
A valve body accommodated in the through hole;
A valve seat that is attached to the through-hole and has a distal end side accommodated in the body, and that forms a valve seat that contacts and separates the valve body at the distal end side, and closes the through-hole by a proximal end side; A solenoid valve comprising:
A female screw is formed in the through hole, and a male screw that can be screwed to the female screw is formed in the valve seat body,
The valve seat body, wherein the internal thread and the recess formed by recessing the male screw in opposite positions are formed, the recess, the recess by adhesive as detent material in the recess is injected Fixed to the female screw facing the inner surface of the valve seat to prevent the valve seat body from rotating ,
One end of the recess is opened from the base end surface of the valve seat body,
The electromagnetic valve according to claim 1, wherein the concave portion also functions as a tool insertion port into which a tool used for screwing the valve seat body back and forth with respect to the through hole can be inserted . The recess, the solenoid valve according to claim 1, characterized in that spaced equidistantly along the circumferential direction of the male screw formed with a plurality.

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