JP5465697B2 - Suction element, manufacturing method of suction element, and solenoid valve equipped with suction element - Google Patents

Description

  The present invention is an attractor that is used in a solenoid valve and is disposed so as to face a plunger, and has a lower end face that faces the plunger of the attractor and a suction coil attached to the lower end surface. The present invention relates to a manufacturing method and a solenoid valve provided with an attractor.

  The present invention also relates to a plunger that is used in an electromagnetic valve and is arranged to face an attractor, and is provided with a plunger having a scissor coil mounted on an upper end surface facing the attractor of the plunger, and a plan The present invention relates to a method for manufacturing a jar and a solenoid valve provided with a plunger.

Conventionally, for example, a general electromagnetic valve is configured as shown in FIG.
That is, as shown in FIG. 19, the electromagnetic valve 100 includes a control unit 104 including a valve body 102.

Moreover, the control part 104 of this electromagnetic valve 100 is provided with the electromagnetic coil 108 by which the drive part 106 was penetrated, as shown in FIG.
The electromagnetic coil 108 is molded with a mold resin 112 so as to surround the bobbin 120 around which the winding is wound and the bobbin 120. Further, as shown in FIG. 19, the electromagnetic coil 108 is mounted inside the magnetic frame 114 and is fixed to the drive unit 106 via the magnetic frame 114.

  That is, the drive unit 106 is inserted through the drive unit insertion hole 118 formed at the center of the bottom plate portion 116 of the magnetic frame 114 and the drive unit insertion hole 122 of the bobbin 120. Then, the fastening bolt 132 is screwed into the bolt insertion hole 126 formed in the upper portion of the attractor 124 of the driving unit 106 via the bolt insertion hole 130 formed in the center portion of the upper plate portion 128 of the magnetic frame 114. Has been.

Thereby, the electromagnetic coil 108 is inserted and fixed to the drive part 106, and the control part 104 of the electromagnetic valve 100 is comprised.
The drive unit 106 includes a plunger case 134 and includes a plunger 136 in which the valve body 102 that can move up and down is fixed. A biasing spring 140 that biases the plunger 136 downward, that is, in the direction of the valve seat 138 is interposed between the suction element 124 and the plunger 136.

  In such an electromagnetic valve 100, when the electromagnetic coil 108 is energized, the plunger 136 moves in the direction of the attractor 124 against the biasing spring 140, and the valve body 102 connected to the plunger 136 is The valve port 142 is opened away from the valve seat 138.

  Further, by shutting off the energization to the electromagnetic coil 108, the plunger 136 moves away from the attractor 124 by the biasing force of the biasing spring 140, and the valve body 102 connected to the plunger 136 is moved. The valve port 142 is closed by contacting the valve seat 138.

  At this time, when an AC voltage is applied to the electromagnetic coil 108, an eddy current is generated, and the plunger 136 moves in the direction of the attracting element 124 against the biasing spring 140, and attracts the plunger 136. It is necessary to maintain the state where the child 124 is in contact, that is, the state where the valve body 102 is separated from the valve seat 138 and the valve port 142 is opened.

For this reason, conventionally, an annular scraping coil 148 is mounted in an annular coil mounting groove 146 formed on the lower end surface 144 facing the plunger 136 of the suction element 124.

  Incidentally, as shown in the enlarged view of FIG. 20, the coil mounting groove 146 has a rectangular cross-sectional shape that is the same as the cross-sectional shape of the scraping coil 148. That is, the shape of the coil mounting groove 146 is a cylindrical shape similar to the shape of the scraping coil 148.

  Therefore, even if the scraping coil 148 is press-fitted into the coil mounting groove 146, there is no catching portion of the scraping coil, so that the holding strength of the scraping coil 148 is weak, and the suction element 124 and the plunger 136 are in contact with each other during operation. Due to the impact force, vibration, and the like, the scraping coil 148 may rattle, and as shown by the arrow in FIG.

  For this reason, conventionally, as shown in FIG. 21, after punching coil 148 is press-fitted into coil mounting groove 146, punching coil 148 is punched into four places (see reference numeral 150 in FIG. 21), so that the winding coil A method of adding a step of fixing 148 to the coil mounting groove 146 is performed.

  Further, as shown in FIG. 22, after pressing the coiling coil 148 into the coil mounting groove 146, a groove 152 having a V-shaped cross section is provided over the entire circumference of the coiling coil 148, so that the coiling coil 148 is used for coil mounting. A method of adding a step of fixing to the groove 146 is performed.

  Further, Patent Document 1 (Japanese Patent Application Laid-Open No. 2007-95924) discloses a method of casting molten material of the coiling coil 148 into the coil mounting groove 146, and a coiling coil in the coil mounting groove 146. A method is disclosed in which a ring material that is a prime of 148 is set, the suction element 124 is placed in a furnace, the ring material is melted, and the scraping coil 148 is joined to the coil mounting groove 146.

JP 2007-95924 A Japanese Patent No. 4565589

  However, in the method disclosed in FIGS. 21 and 22 and Patent Document 1, there is a lack of holding strength of the coiling coil 148 in the coil mounting groove 146, which requires complicated work and takes time and labor. Cost will be high.

  For this reason, there arises a problem that the coiling coil 148 rattles and falls off as shown by the arrow in FIG. 20 due to the impact force or vibration caused by the contact between the attractor 124 and the plunger 136 during operation. In addition, there is a demand for a method of fixing the scraping coil 148 to the coil mounting groove 146 that can reduce the cost without complicated work, time and labor.

Incidentally, Patent Document 2 (Japanese Patent No. 4565589) shows a drawing in which the cross-sectional shape of the coil mounting groove 146 is inclined outward as shown in the drawing. Yes.

  However, in Patent Document 2, in the drawing, the sectional shape of the coil mounting groove 146 is simply formed so as to be inclined outward, and the specific shape, dimensions, The rattling coil 148 is prevented from rattling or coming off due to impact force, vibration, etc. as described above, such as the inclination angle and the width dimension relationship and cross-sectional area (volume) relationship between the coil mounting groove 146 and the scraping coil 148. Therefore, no optimal relationship is disclosed.

As a result of earnest research in view of such a current situation, the present inventors,
(1) Inclination angle of coil mounting groove (2) Relationship between groove width W1 of coil mounting groove and width W2 of coiling coil (3) Cross sectional area V1 of coil mounting groove and cross sectional area V2 of coiling coil (4) By appropriately selecting the conditions for forming a locking portion for locking the scraping coil mounted in the coil mounting groove on the side wall of the coil mounting groove, as described above The present invention has been completed by finding that the rattling coil 148 can be reliably prevented from rattling or coming off due to impact force or vibration.

  In view of the current situation, the present invention does not cause a problem that the coiling coil rattles or falls off due to impact force, vibration, etc. due to contact between the attractor and the plunger during operation, Providing a method of fixing the scraping coil to the coil mounting groove, which can reduce costs without taking complicated work, time and labor, and manufacturing an attractor equipped with the scraping coil, and an attractor The object is to provide a method and a solenoid valve with an attractor.

  In addition, in view of the present situation, the present invention does not cause a problem that the coiling coil rattles or falls off due to impact force, vibration, etc. due to contact between the attractor and the plunger during operation, In addition, it provides a fixing method of the coiling coil to the coil mounting groove, which can reduce the cost without taking troublesome work, time and labor, and a plunger equipped with the coiling coil, and a plunger An object of the present invention is to provide a manufacturing method of the above and a solenoid valve provided with a plunger.

The present invention has been invented in order to achieve the problems and objects in the prior art as described above.
An attractor used for a solenoid valve and disposed opposite to a plunger,
An annular coil mounting groove for mounting a coiling coil on the lower end surface facing the plunger of the suction element;
An annular scraping coil mounted to fill the coil mounting groove,
The coil mounting groove is formed so as to be inclined outward or inward in a cross section,
The relationship between the cross-sectional area V1 of the coil mounting groove and the cross-sectional area V2 of the scraping coil is:
Set so that V1 <V2.
The portion of the coiling coil that protrudes from the lower end surface of the suction element is removed by finishing .

In addition, the manufacturing method of the suction element of the present invention,
A method of manufacturing an attractor that is used in a solenoid valve and is arranged to face a plunger,
A mounting groove forming step for forming an annular coil mounting groove for mounting a coiling coil on the lower end surface facing the plunger of the suction element;
A coiling coil mounting process for mounting the coil mounting groove so as to fill the annular coiling coil;
The coil mounting groove is formed so as to be inclined outward or inward in a cross section,
In the mounting groove forming step,
The relationship between the cross-sectional area V1 of the coil mounting groove and the cross-sectional area V2 of the scraping coil is:
Set so that V1 <V2.
A finishing process for removing the portion of the coiling coil protruding from the lower end surface of the suction element by finishing is provided .

That is, when the removal of the portion of the coiling coil that protrudes from the lower end surface of the attractor is not considered in the finishing process, dimensional management of the coiling coil and the coil mounting groove becomes strict. As a result, when the dimension management of the coiling coil and the coil mounting groove is not strict, press fitting is insufficient, and the coiling coil cannot be filled in the coil mounting groove.

In this way, when the coiling coil can no longer be filled in the coil mounting groove, the coiling coil rattles or falls off due to the impact force, vibration, etc. caused by the contact between the suction element and the plunger during operation. In addition, there is a risk that the coiling coil protrudes from the coil mounting groove and is damaged by wear.

Further, in the case of V1 <V2, the plunger and the suction element may be in contact with each other, that is, the valve body may be separated from the valve seat and the valve open state in which the valve port is opened cannot be maintained. There is also a cause of abnormal noise.

On the other hand, as in the present invention, the coiling coil protruding from the lower end surface of the attractor is set such that the relationship V1 <V2 between the cross-sectional area V1 of the coil mounting groove and the cross-sectional area V2 of the coiling coil Since the finishing process is always taken into account by removing this part by finishing, the dimension management of the coiling coil and coil mounting groove can be simplified, and the coiling coil is placed in the coil mounting groove. It is possible to press-fit into

Also, the suction element of the present invention is
An attractor used for a solenoid valve and disposed opposite to a plunger,
An annular coil mounting groove for mounting a coiling coil on the lower end surface facing the plunger of the suction element;
An annular scraping coil mounted to fill the coil mounting groove,
The coil mounting groove is formed so as to be inclined outward or inward in a cross section,
The relationship between the groove width W1 of the coil mounting groove and the width W2 of the scraping coil is:
0.8W1 ≦ W2 <W1 is set ,
The relationship between the cross-sectional area V1 of the coil mounting groove and the cross-sectional area V2 of the scraping coil is:
Set so that V1 <V2.
The portion of the coiling coil that protrudes from the lower end surface of the suction element is removed by finishing .

In addition, the manufacturing method of the suction element of the present invention,
A method of manufacturing an attractor that is used in a solenoid valve and is arranged to face a plunger,
A mounting groove forming step for forming an annular coil mounting groove for mounting a coiling coil on the lower end surface facing the plunger of the suction element;
A coiling coil mounting process for mounting the coil mounting groove so as to fill the annular coiling coil;
The coil mounting groove is formed so as to be inclined outward or inward in a cross section,
In the mounting groove forming step,
The relationship between the groove width W1 of the coil mounting groove and the width W2 of the scraping coil,
Set to the range of 0.8W1 ≦ W2 <W1 ,
The relationship between the cross-sectional area V1 of the coil mounting groove and the cross-sectional area V2 of the scraping coil is:
Set so that V1 <V2.
A finishing process for removing the portion of the coiling coil protruding from the lower end surface of the suction element by finishing is provided .

  That is, when the relationship between the groove width W1 of the coil mounting groove and the width W2 of the scraping coil is W1 ≦ W2, the scraping coil does not fit into the coil mounting groove. Setting (positioning) is difficult.

  In the case of W1 <W2, when press-fitting the coiling coil into the coil mounting groove, the coiling coil is caught by the opening end of the coil mounting groove, and thus a large press-fitting load is required. As a result, the scraping coil cannot be smoothly press-fitted into the coil mounting groove.

  As a result, the coil mounting groove is likely to be deformed or insufficiently press-fitted, and there is a risk of rattling and dropping of the coiling coil due to impact force, vibration, etc. due to contact between the suction element and the plunger during operation. .

  As a result, there is a possibility that the plunger and the suction element are in contact with each other, that is, the valve body may not be able to maintain the valve open state in which the valve opening is separated from the valve seat, This may cause abnormal noise.

  Conversely, if the relationship between the groove width W1 of the coil mounting groove and the width W2 of the coiling coil is W1 >> W2, the coiling coil is filled in the coil mounting groove by matching the groove shape of the coil mounting groove. When trying to make it, since the deformation amount of a coiling coil is large, a big press-fit load is needed.

  Therefore, if the coiling coil cannot be filled in the coil mounting groove due to insufficient press-fitting, the coiling coil rattles or drops off due to impact force, vibration, etc. due to the contact between the suction element and the plunger during operation. There is a fear.

  Therefore, as in the present invention, the relationship between the groove width W1 of the coil mounting groove and the width W2 of the coiling coil is set to a range of 0.8W1 ≦ W2 <W1, preferably W2 = 0.9W1. By doing so, such a problem can be solved.

Further, as described above, as in the present invention, the portion of the coiling coil in which the relationship between the cross-sectional area V1 of the coil mounting groove and the cross-sectional area V2 of the coiling coil protrudes from the lower end surface of the attractor is finished by finishing. Since the removal process is always taken into consideration, the dimension control of the coiling coil and coil mounting groove can be simplified, and the coiling coil can be surely press-fitted into the coil mounting groove. Is possible.

Also, the suction element of the present invention is
By the finishing process, the plunger side surface of the coiling coil is formed so as to be positioned on the groove side from the groove opening surface of the coil mounting groove.

In addition, the manufacturing method of the suction element of the present invention,
By the finishing process, the surface on the plunger side of the coiling coil is formed so as to be positioned on the groove side from the groove opening surface of the coil mounting groove.

Moreover, this invention is an electromagnetic valve provided with the attractor as described above.
With this configuration, there is no risk of rattling or loosening of the scraping coil due to impact force or vibration due to the contact between the suction element and the plunger during operation, and the plunger is driven by the eddy current generated by the scraping coil. And the suction element are in contact with each other, that is, the valve body can be kept away from the valve seat and the valve opening can be kept open, and the operation of the solenoid valve must be ensured. Can do.

According to the present invention,
(1) The relationship between the cross-sectional area V1 of the coil mounting groove and the cross-sectional area V2 of the coiling coil is set so that V1 <V2, and the portion of the coiling coil that protrudes from the lower end surface of the attractor is finished. in removing (2) and the groove width W1 of the coil mounting groove, the relationship between the width W2 of the shading coil, be set in a range of 0.8W1 ≦ W2 <W1
(3) Appropriately select the condition that the surface on the plunger side of the coiling coil is formed closer to the groove side than the groove opening surface of the coil mounting groove by finishing. By
There is no risk of rattling or loosening of the coiling coil due to impact force or vibration caused by the contact between the attractor and plunger during operation, and the plunger and the attractor contacted by the eddy current generated by the coiling coil. The state, that is, the valve body is kept away from the valve seat and the valve opening is opened, and the operation of the electromagnetic valve can be ensured.

FIG. 1 is a schematic longitudinal sectional view of a solenoid valve provided with an attractor of the present invention. FIG. 2 is an enlarged cross-sectional view of the suction element of FIG. FIG. 3 is a partially enlarged view for explaining the inclination angle α of the coil mounting groove of the attractor of FIG. FIG. 4 is an enlarged cross-sectional view for explaining the manufacturing method of the suction element of the present invention. FIG. 5 is an enlarged cross-sectional view similar to FIG. 2 showing another embodiment of the suction element of the present invention. FIG. 6 is a partially enlarged view for explaining the relationship between the groove width W1 of the coil mounting groove 54 of the attractor and the width W2 of the scraping coil 56, showing another embodiment of the attractor of the present invention. FIG. 7 is an enlarged cross-sectional view for explaining a method of manufacturing an attractor according to another embodiment of the present invention. FIG. 8 is an enlarged cross-sectional view showing the relationship between the cross-sectional area V1 of the coil mounting groove 54, the cross-sectional area V2 of the scraping coil 56, and the shape of the press-fitting jig 58. FIG. FIG. 8B is an enlarged cross-sectional view for explaining a method of manufacturing an attractor according to an embodiment of the present invention when V1 <V2. FIG. 9 is an enlarged sectional view showing another embodiment of the suction element of the present invention. 10 is an enlarged cross-sectional view of a portion B in FIG. FIG. 11 is an enlarged cross-sectional view showing another embodiment of the suction element of the present invention. FIG. 12 is an enlarged cross-sectional view showing another embodiment of the suction element of the present invention. FIG. 13 is an enlarged cross-sectional view showing another embodiment of the suction element of the present invention. FIG. 14 is an enlarged sectional view showing another embodiment of the suction element of the present invention. FIG. 15 is an enlarged cross-sectional view of a portion C in FIG. FIG. 16 is an enlarged cross-sectional view showing another embodiment of the suction element of the present invention. FIG. 17 is a schematic longitudinal cross-sectional view of a solenoid valve provided with the plunger of the present invention. 18 is an enlarged cross-sectional view of the plunger of FIG. FIG. 19 is a schematic longitudinal cross-sectional view of a solenoid valve provided with a conventional attractor. 20 is an enlarged cross-sectional view of the attractor of FIG. FIG. 21 is a schematic diagram for explaining a method of fixing a scraping coil to a coil mounting groove in a conventional attractor. FIG. 22 is a schematic diagram for explaining a method of fixing a scraping coil to a coil mounting groove in a conventional attractor.

  Hereinafter, embodiments (examples) of the present invention will be described in more detail with reference to the drawings.

  1 is a schematic longitudinal sectional view of a solenoid valve equipped with the attractor of the present invention, FIG. 2 is an enlarged sectional view of the attractor of FIG. 1, and FIG. 3 is an inclination angle of a coil mounting groove of the attractor of FIG. FIG. 4 is an enlarged sectional view for explaining the manufacturing method of the suction element of the present invention, and FIG. 5 is an enlarged sectional view similar to FIG. 2 showing another embodiment of the suction element of the present invention. FIG.

In FIG. 1, the code | symbol 10 has shown the solenoid valve provided with the attractor of this invention as a whole.
That is, as shown in FIG. 1, the electromagnetic valve 10 includes a control unit 14 including a valve body 12.

Moreover, the control part 14 of this electromagnetic valve 10 is provided with the electromagnetic coil 18 by which the drive part 16 was penetrated, as shown in FIG.
The electromagnetic coil 18 is molded with a mold resin 22 so as to surround the bobbin 20 around which the winding is wound and the bobbin 20. Further, as shown in FIG. 1, the electromagnetic coil 18 is mounted inside the magnetic frame 26 and is fixed to the drive unit 16 via the magnetic frame 26.

  That is, the drive unit 16 is inserted into the drive unit insertion hole 34 formed in the center of the bottom plate 30 of the magnetic frame 26 and the drive unit insertion hole 24 of the bobbin 20. Then, the fastening bolt 40 is screwed into the bolt insertion hole 32 formed in the upper portion of the attractor 28 of the drive unit 16 through the bolt insertion hole 38 formed in the center portion of the upper plate portion 36 of the magnetic frame 26. Has been.

Thereby, the electromagnetic coil 18 is inserted and fixed to the drive part 16, and the control part 14 of the electromagnetic valve 10 is comprised.
The drive unit 16 includes a plunger case 42 and includes a plunger 44 in which the valve body 12 that can move up and down is fixed. A biasing spring 48 that biases the plunger 44 downward, that is, in the direction of the valve seat 46, is interposed between the suction element 28 and the plunger 44.

  In such an electromagnetic valve 10, when the electromagnetic coil 18 is energized, the plunger 44 moves in the direction of the attractor 28 against the biasing spring 48, and the valve body 12 connected to the plunger 44 is moved. The valve port 50 is opened away from the valve seat 46.

  Further, by shutting off the energization of the electromagnetic coil 18, the plunger 44 is moved away from the attractor 28 by the biasing force of the biasing spring 48, and the valve body 12 connected to the plunger 44 is moved. The valve port 50 is closed by contacting the valve seat 46.

  At this time, when the electromagnetic coil 18 is energized, an eddy current is generated, and the plunger 44 moves in the direction of the attractor 28 against the biasing spring 48, and the plunger 44, the attractor 28, , That is, the valve body 12 needs to be kept away from the valve seat 46 and the valve opening 50 opened.

For this reason, an annular coiling coil 56 is mounted in an annular coil mounting groove 54 formed in the lower end surface 52 facing the plunger 44 of the suction element 28.
That is, as shown in FIG. 2, in the present invention, the relationship between the inner diameter D1 of the coil mounting groove 54 and the inner diameter D2 of the scraping coil 56 is set so that D1 <D2.

2 to 4, the suction element 28 is illustrated upside down for convenience of explanation (the same applies to the following embodiments).
As shown in FIGS. 2 to 4, the coil mounting groove 54 has a cross section in which the groove side walls 54 a and 54 b of the coil mounting groove 54 are outward toward the opening of the coil mounting groove 54. It is formed so as to be inclined.

Further, as shown in FIG. 3, the inclination angle α of the groove side walls 54a and 54b of the coil mounting groove 54 is set in the range of 5 ° to 25 °.
That is, when the inclination angle α of the groove side walls 54a and 54b of the coil mounting groove 54 is less than 5 ° (FIG. 3B) , the deformation amount of the scraping coil 56 is small, and there is no catching portion of the scraping coil 56. It becomes a state and holding strength becomes low.

  On the contrary, when the inclination angle α of the groove side walls 54a and 54b of the coil mounting groove 54 exceeds 25 ° (FIG. 3C), the deformation amount of the scraping coil 56 becomes large. The load required for press-fitting into the groove 54 also increases.

  For this reason, the load is likely to be insufficient, and the inside of the coil mounting groove 54 may not be filled with the scissor coil, and the scissors are removed by impact force, vibration, etc. due to the contact between the suction element 28 and the plunger 44 during operation. There is a possibility that the coil 56 may rattle or fall off.

  As a result, the state in which the plunger 44 and the suction element 28 are in contact, that is, the valve body 12 is separated from the valve seat 46 and cannot be maintained in the valve open state in which the valve port 50 is opened. There is.

  Furthermore, if the exclusive area of the coiling coil of the lower end surface (suction surface) facing the plunger 44 of the suction element 28 is the same, the groove width of the coil mounting groove 54 becomes narrow and the groove processing becomes difficult. Become. That is, since the width of the byte is narrowed, the byte is likely to be lost, and the life of the byte is shortened.

  Therefore, as shown in FIG. 3, by setting the inclination angle α of the groove side walls 54a, 54b of the coil mounting groove 54 in the range of 5 ° to 25 °, preferably in the range of 15 ° ± 2 °. Can solve such problems.

  The material of the attractor 28 and the scraping coil 56 is metal, and the material is not limited as long as the scraping coil 56 is a metal softer than the attractor 28 and generates eddy current. 28 can be made of stainless steel (SUS), and the coiling coil 56 can be made of a metal having high electrical conductivity such as copper, aluminum, gold, silver, and magnesium.

Then, as shown in FIG. 4, the suction coil 28 of the present invention is manufactured by press-fitting the coiling coil 56 into the coil mounting groove 54 of the suction element 28 configured as described above.
Further, in this embodiment, as shown in FIGS. 2 to 4, the coil mounting groove 54 has a cross-section in which the groove side walls 54 a and 54 b of the coil mounting groove 54 are formed in the opening of the coil mounting groove 54. However, as shown in FIG. 5, on the contrary, the coil mounting groove 54 is formed so that the groove side walls 54a and 54b of the coil mounting groove 54 in the cross section are coil mounted. It can also be formed so as to be inclined inward toward the opening of the groove 54 (the same applies to the following embodiments).

FIG. 6 is a partially enlarged view for explaining the relationship between the groove width W1 of the coil mounting groove 54 of the attractor and the width W2 of the scraping coil 56, showing another embodiment of the attractor of the present invention.
The suction element 28 of this embodiment has basically the same configuration as that of the suction element 28 shown in the first embodiment, and the same reference numerals are given to the same components, and a detailed description thereof will be given. Omitted.

In the attractor 28 of this embodiment, as shown in FIG. 6, the relationship between the groove width W1 of the coil mounting groove 54 and the width W2 of the scraping coil 56 is
0.8W1 ≦ W2 <W1
Is set in the range.

  That is, when the relationship between the groove width W1 of the coil mounting groove 54 and the width W2 of the scraping coil is W1 ≦ W2 (see FIG. 6B), the scraping coil 56 does not fit into the coil mounting groove 54. That is, since the corner portion (A portion in FIG. 6B) of the scraping coil 56 is caught by the open end portions 54c and 54d of the coil mounting groove 54, the scraping coil 56 is set in the coil mounting groove 54. (Locating) is difficult.

  In the case of W1 <W2, when the scraping coil 56 is press-fitted into the coil mounting groove 54, the scraping coil is caught on the opening end of the coil mounting groove 54, so that a large press-fitting load is required. As a result, the scraping coil 56 cannot be smoothly press-fitted into the coil mounting groove 54.

  As a result, the coil mounting groove 54 is likely to be deformed or insufficiently press-fitted, and the coiling coil rattles or falls off due to impact force, vibration, etc. due to contact between the suction element 28 and the plunger 44 during operation. There is a fear.

  As a result, there is a possibility that the plunger 44 and the suction element 28 are in contact with each other, that is, the valve body 12 is not separated from the valve seat 46 and cannot maintain the valve open state in which the valve port 50 is opened. There is also a cause of abnormal noise.

  Conversely, when the relationship between the groove width W1 of the coil mounting groove 54 and the width W2 of the coiling coil is W1 >> W2 (see FIG. 6C), the coiling coil 56 is formed in the groove shape of the coil mounting groove 54. Accordingly, when the coil mounting groove 54 is to be filled, a large press-fit load is required because the amount of deformation of the scraping coil 56 is large.

  Therefore, when the coiling coil 56 cannot be filled in the coil mounting groove 54 due to insufficient press-fitting, the coiling coil rattles due to impact force, vibration, etc. due to the contact between the suction element 28 and the plunger 44 during operation. Dropping may occur.

  Therefore, as shown in FIG. 6A, the relationship between the groove width W1 of the coil mounting groove 54 and the width W2 of the scraping coil 56 is in the range of 0.8W1 ≦ W2 <W1, preferably W2 = Such a problem can be solved by setting in the range of 0.9W1.

FIG. 7 is an enlarged cross-sectional view for explaining a manufacturing method of an attractor according to another embodiment of the present invention, and FIG. 8 shows the relationship between the cross-sectional area V1 of the coil mounting groove 54 and the cross-sectional area V2 of the scissor coil 56. FIG. 8A is an enlarged cross-sectional view showing the relationship with the shape of the press-fitting jig 58 , FIG. 8A is an enlarged cross-sectional view showing a reference example in the case of V1> V2, and FIG. 8B is a case of V1 <V2. It is an expanded sectional view explaining the manufacturing method of a suction element of the Example of this invention.

The suction element 28 of this embodiment has basically the same configuration as that of the suction element 28 shown in the first embodiment, and the same reference numerals are given to the same components, and a detailed description thereof will be given. Omitted.
In the attractor 28 of this embodiment, as shown in FIG. 7, the relationship between the cross-sectional area V1 of the coil mounting groove 54 and the cross-sectional area V2 of the scraping coil 56 is
The range of V1 <V2 is set.

That is, when the relationship between the cross-sectional area V1 of the coil mounting groove 54 and the cross-sectional area V2 of the scraping coil 56 is V1> V2 , as shown in the reference example of FIG. Although it is possible to press fit into the mounting groove 54, the press fitting jig 58 becomes complicated.

That is, as shown in the reference example of FIG. 8A, in order to press-fit the coiling coil 56 into the coil mounting groove 54, the coil press-fitting surface 60 of the press-fitting jig 58 is matched with the shape of the coiling coil 56. Therefore, it is necessary to provide the protrusion 62, and it becomes difficult to configure and manage the press-fitting jig, which increases the cost.

On the other hand, as in the embodiment of the present invention shown in FIG. 8B , the relationship between the cross-sectional area V1 of the coil mounting groove 54 and the cross-sectional area V2 of the scraping coil 56 is in the range of V1 <V2 . Since the coil volume of the coiling coil 56 has a margin by setting the coil press-fitting surface 60 of the press-fitting jig 58 as shown in FIG. 8B, the press-fitting jig 58 can be made flat. And the jig management of the press-fitting jig 58 is simplified, and the cost can be reduced.

Furthermore, in this embodiment, as shown in FIG. 7, the relationship between the cross-sectional area V1 of the coil mounting groove 54 and the cross-sectional area V2 of the scraping coil 56 is
When V1 <V2,
The protruding portion 56a of the scraping coil 56 protruding from the lower end surface 52 of the attractor 28 is configured to be removed by finishing.
Further, as shown in FIG. 7, the surface on the plunger 44 side of the coiling coil 56 is formed by finishing so as to be positioned on the groove side from the groove opening surface of the coil mounting groove 54.

  That is, when it is not considered to remove the protruding portion 56a of the scraping coil 56 that protrudes from the lower end surface 52 of the attractor 28 by finishing, dimensional management of the scraping coil 56 and the coil mounting groove 54 becomes severe. As a result, when dimensional management of the coiling coil 56 and the coil mounting groove 54 is not strict, press fitting is insufficient, and the coiling coil 56 cannot be filled in the coil mounting groove 54.

  In this way, when the coiling coil 56 can no longer be filled in the coil mounting groove 54, the coiling coil 56 may be loose or fall off due to the impact force or vibration caused by the contact between the suction element and the plunger during operation. May occur, and the coiling coil 56 may protrude from the coil mounting groove 54 and be damaged by wear.

  As a result, the state in which the plunger 44 and the suction element 28 are in contact, that is, the valve body 12 is separated from the valve seat 46 and cannot be maintained in the valve open state in which the valve port 50 is opened. There is also a cause of abnormal noise.

  On the other hand, as in the present invention, when the relationship between the cross-sectional area V1 of the coil mounting groove 54 and the cross-sectional area V2 of the scraping coil 56 is V1 <V2, it protrudes from the lower end surface 52 of the attractor 28. Since the finishing process is always taken into account by removing the protruding portion 56a of the coiling coil 56 by finishing, the dimension management of the coiling coil 56 and the coil mounting groove 54 can be simplified, It is possible to reliably press-fit the coiling coil 56 into the coil mounting groove 54.

9 is an enlarged cross-sectional view showing another embodiment of the suction element of the present invention, FIG. 10 is an enlarged cross-sectional view of a portion B in FIG. 9, and FIG. 11 shows another embodiment of the suction element of the present invention. It is an expanded sectional view.
In the attractor 28 of this embodiment, as shown in FIGS. 9 to 10, the cross-sectional shape of the coil mounting groove 54 is substantially rectangular like the cross-sectional shape of the scraping coil 56.

Further, a locking portion 64 having a rectangular cross section for locking the scraping coil 56 mounted in the coil mounting groove 54 is formed on the groove side wall 54 a outside the coil mounting groove 54.
Thus, by forming the locking portion 64 for locking the scraping coil 56 mounted in the coil mounting groove 54 on the groove side wall of the coil mounting groove 54, the hooked portion of the scraping coil 56 exists. , The holding strength is increased.

  As a result, there is no possibility that rattling coil 56 will rattle or fall off due to impact force, vibration, etc. due to the contact between the suction element and the plunger during operation, and the plunger 44 and the suction element 28 are in contact with each other. That is, the valve body 12 can be separated from the valve seat 46 and can maintain the valve open state in which the valve port 50 is opened.

In this case, as shown in FIG. 10, it is desirable that the projecting distance X in the radial direction of the locking portion 64 is 0.3 to 0.6 mm.
That is, when the protruding distance X in the radial direction of the locking portion 64 is smaller than 0.3 mm, the scraping coil 56 press-fitted into the coil mounting groove 54 is hardly caught, and the suction element 28 and the plan at the time of operation are reduced. There is a possibility that rattling coil 56 may rattle or fall off due to impact force or vibration caused by contact with jar 44.

  On the contrary, if the protruding distance X in the radial direction of the locking portion 64 is larger than 0.6 mm, the required press-fitting load is suddenly increased when the coiling coil 56 is pressed into the coil mounting groove 54 without a gap. Will become bigger.

  For this reason, the load is likely to be insufficient, and the inside of the coil mounting groove 54 may not be filled with the scraping coil 56. Due to the impact force, vibration, etc. caused by the contact between the suction element 28 and the plunger 44 during operation, There is a possibility that rattling coil 56 may rattle or fall off.

  In particular, when the axial distance Y of the latching portion 64 is small, the bite shape of the portion where the latching portion 64 is processed becomes thin, the durability of the bite decreases, the mass productivity decreases, and the cost increases. become.

Further, the axial distance Y of the locking portion 64 is desirably 0.5 to 1.0 mm.
That is, when the axial distance Y of the locking portion 64 is smaller than 0.5 mm, the width of the stepped portion of the locking portion 64 is too small, and the scraping coil 56 is press-fitted into the coil mounting groove 54. However, the scraping coil 56 does not enter the coil mounting groove 54 well.

For this reason, the strength of the stepped portion (the hooked portion) of the locking portion 64 is low, and there is a possibility of being damaged by an impact.
As a result, the state in which the plunger 44 and the suction element 28 are in contact, that is, the valve body 12 is separated from the valve seat 46 and cannot be maintained in the valve open state in which the valve port 50 is opened. There is also a cause of abnormal noise.

Further, the bite shape of the stepped portion of the locking part 64 becomes thin, the durability of the bite decreases, the mass productivity decreases, and the cost increases.
On the contrary, when the axial distance Y of the locking portion 64 is larger than 1.0 mm, the required press-fitting load increases suddenly when trying to press-fit the scraping coil 56 into the coil mounting groove 54 without a gap. turn into.

  For this reason, the load is likely to be insufficient, and the inside of the coil mounting groove 54 may not be filled with the scraping coil 56. Due to the impact force, vibration, etc. caused by the contact between the suction element 28 and the plunger 44 during operation, There is a possibility that rattling coil 56 may rattle or fall off.

  In addition, the required amount of the coiling coil 56 increases, the grooving time increases, the burden on the cutting tool increases, and as a result, the durability of the cutting tool decreases, the mass productivity decreases, and the cost increases. It will be.

  In the attractor 28 of this embodiment, a rectangular locking portion 64 for locking the scraping coil 56 mounted in the coil mounting groove 54 is formed on the groove side wall 54a outside the coil mounting groove 54. However, as shown in FIG. 11, a rectangular locking portion 64 for locking the scraping coil 56 mounted in the coil mounting groove 54 is formed on the groove side wall 54b inside the coil mounting groove 54. Is also possible.

FIG. 12 is an enlarged sectional view showing another embodiment of the suction element of the present invention, and FIG. 13 is an enlarged sectional view showing another embodiment of the suction element of the present invention.
The suction element 28 of this embodiment has basically the same configuration as that of the suction element 28 shown in the fourth embodiment. The same reference numerals are given to the same constituent members, and the detailed description thereof will be given. Omitted.

  In the suction element 28 of this embodiment, as shown in FIG. 12, the cross section for locking the scraping coil 56 mounted on the coil mounting groove 54 to the groove side wall 54a outside the coil mounting groove 54 is triangular. The locking portion 64 is formed.

  Further, in the attractor 28 of the embodiment shown in FIG. 13, the cross section for locking the scraping coil 56 mounted on the coil mounting groove 54 to the groove side wall 54b inside the coil mounting groove 54 is a triangular shape (wedge). ) And is configured to prevent rattling and dropping off in the coil mounting groove 54 of the scraping coil 56.

  With the suction element 28 of this embodiment, it is possible to achieve substantially the same operational effects as in the fourth embodiment.

14 is an enlarged cross-sectional view showing another embodiment of the suction element of the present invention, FIG. 15 is an enlarged cross-sectional view of a portion C in FIG. 14, and FIG. 16 shows another embodiment of the suction element of the present invention. It is an expanded sectional view.
The suction element 28 of this embodiment has basically the same configuration as that of the suction element 28 shown in the fourth embodiment. The same reference numerals are given to the same constituent members, and the detailed description thereof will be given. Omitted.

  In the suction element 28 of this embodiment, as shown in FIGS. 14 to 15, the locking portion 64 is formed on the groove side wall 54 a outside the coil mounting groove 54, which is one groove side wall of the coil mounting groove 54. The engaging portion 64a is inclined outwardly toward the opening of the coil mounting groove 54.

  In the attractor 28 of the embodiment of FIG. 16, the locking portion 64 is formed on the groove side wall 54 b inside the coil mounting groove 54, which is one groove side wall of the coil mounting groove 54. It is formed by a locking portion 64a inclined inward toward the opening.

  By configuring in this way, it is possible to simply remove one of the groove side walls of the coil mounting groove 54 outwardly or inwardly, so that the coil mounting groove 54 is attached to the groove side wall of the coil mounting groove 54. Since the locking portion for locking the coil 56 can be formed, the groove processing of the coil mounting groove 54 is simplified, and the cost can be reduced.

FIG. 17 is a schematic longitudinal sectional view of a solenoid valve provided with the plunger of the present invention, and FIG. 18 is an enlarged sectional view of the plunger of FIG.
The electromagnetic valve 10 of this embodiment has basically the same configuration as that of the electromagnetic valve 10 shown in the first embodiment, and the same constituent members are denoted by the same reference numerals and detailed description thereof will be given. Omitted.

In the first to sixth embodiments, the annular coiling coil 56 is mounted on the annular coil mounting groove 54 formed on the lower end surface 52 facing the plunger 44 of the suction element 28.
On the other hand, in the electromagnetic valve 10 of this embodiment, an annular coiling coil 56 is mounted in an annular coil mounting groove 68 formed on the upper end surface 66 facing the attractor 28 of the plunger 44.

  As described above, the coiling coil 56 is mounted not on the attractor 28 side but on the plunger 44 side, so that an eddy current is generated when the electromagnetic coil 18 is energized as in the first embodiment. The plunger 44 moves in the direction of the suction element 28 against the biasing spring 48, and the plunger 44 and the suction element 28 are in contact with each other, that is, the valve body 12 is separated from the valve seat 46. Thus, the effect of maintaining the state in which the valve port 50 is opened can be obtained.

In the case of Example 7, as in Examples 1 to 6, although not shown,
(A) The inclination angle α of the coil mounting groove 68 is set in the range of 5 ° to 25 °.
(B) The relationship between the groove width W1 of the coil mounting groove 68 and the width W2 of the scraping coil 56 is set in a range of 0.8W1 ≦ W2 <W1.
(C) The relationship between the cross-sectional area V1 of the coil mounting groove 68 and the cross-sectional area V2 of the scraping coil 56 is set in the range of V1 ≦ V2.
(D) By combining at least one or more conditions for forming a latching portion for latching the winding coil 56 mounted in the coil mounting groove 68 on the groove side wall of the coil mounting groove 68, A plunger can be constructed.

The preferred embodiments of the present invention have been described above, but the present invention is not limited to them.
(1) The relationship between the cross-sectional area V1 of the coil mounting groove and the cross-sectional area V2 of the coiling coil is set so that V1 <V2, and the portion of the coiling coil that protrudes from the lower end surface of the attractor is finished. in removing (2) and the groove width W1 of the coil mounting groove, the relationship between the width W2 of the shading coil, be set in a range of 0.8W1 ≦ W2 <W1
(3) Combining at least one or more of the conditions that the surface on the plunger side of the coiling coil is positioned closer to the groove side than the groove opening surface of the coil mounting groove by finishing. Thus, the suction element of the present invention can be configured.

  Further, in the present invention, the annular coil mounting groove 54 formed on the lower end surface 52 facing the plunger 44 of the suction element 28 and the annular coil mounting formed on the upper end surface 66 facing the suction element 28 of the plunger 44. In the groove for use 68 and the annular scraping coil 56, “annular” means various annular shapes other than a circular annular shape, such as a square annular shape, a triangular annular shape, a polygonal annular shape, and an elliptical annular shape. However, it is not limited at all.

Further, for example, in the above-described embodiment, the solenoid valve 10 of the present invention is molded with the mold resin 22. However, when the waterproof property is not required, the mold resin can be omitted.
Further, although the attractor 28 of the present invention is applied to the two-way electromagnetic valve 10, various modifications can be made without departing from the object of the present invention, such as being applicable to various electromagnetic valves such as a three-way valve.

  The present invention is an attractor that is used in a solenoid valve and is disposed so as to face a plunger, and has a lower end face that faces the plunger of the attractor and a suction coil attached to the lower end surface. The present invention can be applied to a manufacturing method and a solenoid valve provided with an attractor.

DESCRIPTION OF SYMBOLS 10 Solenoid valve 12 Valve body 14 Control part 16 Drive part 18 Electromagnetic coil 20 Bobbin 22 Mold resin 24 Drive part insertion hole 26 Magnetic frame 28 Attractor 30 Bottom plate part 32 Bolt insertion hole 34 Drive part insertion hole 36 Upper plate part 38 Bolt insertion Hole 40 Fastening bolt 42 Plunger case 44 Plunger 46 Valve seat 48 Energizing spring 50 Valve port 52 Lower end surface 54 Coil mounting groove 54a Groove side wall 54b Groove side wall 54c Open end 56 Scrape coil 56a Overhang portion 58 Press fitting jig 60 Coil press-fit surface 62 Protruding portion 64 Locking portion 64a Inclined surface 66 Upper end surface 68 Coil mounting groove 100 Electromagnetic valve 102 Valve body 104 Control unit 106 Driving unit 108 Electromagnetic coil 112 Mold resin 114 Magnetic frame 116 Bottom plate unit 118 Driving unit insertion hole 120 Bobbin 122 Drive part insertion hole 124 Suction element 126 Bob DOO insertion hole 128 upper plate 130 bolt holes 132 fastening bolt 134 plunger case 136 plunger 138 valve seat 140 biasing spring 142 valve port 144 lower surface 146 groove coil mounting 148 shading coil 152 grooves

Claims (7)

An attractor used for a solenoid valve and disposed opposite to a plunger,
An annular coil mounting groove for mounting a coiling coil on the lower end surface facing the plunger of the suction element;
An annular scraping coil mounted to fill the coil mounting groove,
The coil mounting groove is formed so as to be inclined outward or inward in a cross section,
The relationship between the cross-sectional area V1 of the coil mounting groove and the cross-sectional area V2 of the scraping coil is:
Set so that V1 <V2.
A suction element characterized in that a portion of the coiling coil protruding from the lower end surface of the suction element is removed by finishing . An attractor used for a solenoid valve and disposed opposite to a plunger,
An annular coil mounting groove for mounting a coiling coil on the lower end surface facing the plunger of the suction element;
An annular scraping coil mounted to fill the coil mounting groove,
The coil mounting groove is formed so as to be inclined outward or inward in a cross section,
The relationship between the groove width W1 of the coil mounting groove and the width W2 of the scraping coil is:
0.8W1 ≦ W2 <W1 is set ,
The relationship between the cross-sectional area V1 of the coil mounting groove and the cross-sectional area V2 of the scraping coil is:
Set so that V1 <V2.
A suction element characterized in that a portion of the coiling coil protruding from the lower end surface of the suction element is removed by finishing . The surface of the plunger side of the coiling coil is formed so as to be positioned closer to the groove side than the groove opening surface of the coil mounting groove by the finishing process. The aspirator described in 1. A method of manufacturing an attractor that is used in a solenoid valve and is arranged to face a plunger,
A mounting groove forming step for forming an annular coil mounting groove for mounting a coiling coil on the lower end surface facing the plunger of the suction element;
A coiling coil mounting process for mounting the coil mounting groove so as to fill the annular coiling coil;
The coil mounting groove is formed so as to be inclined outward or inward in a cross section,
In the mounting groove forming step,
The relationship between the cross-sectional area V1 of the coil mounting groove and the cross-sectional area V2 of the scraping coil is:
Set so that V1 <V2.
A method of manufacturing an attractor, comprising a finishing step of removing a portion of the coiling coil protruding from the lower end surface of the attractor by finishing . A method of manufacturing an attractor that is used in a solenoid valve and is arranged to face a plunger,
A mounting groove forming step for forming an annular coil mounting groove for mounting a coiling coil on the lower end surface facing the plunger of the suction element;
A coiling coil mounting process for mounting the coil mounting groove so as to fill the annular coiling coil;
The coil mounting groove is formed so as to be inclined outward or inward in a cross section,
In the mounting groove forming step,
The relationship between the groove width W1 of the coil mounting groove and the width W2 of the scraping coil,
Set to the range of 0.8W1 ≦ W2 <W1 ,
The relationship between the cross-sectional area V1 of the coil mounting groove and the cross-sectional area V2 of the scraping coil is:
Set so that V1 <V2.
A method of manufacturing an attractor, comprising a finishing step of removing a portion of the coiling coil protruding from the lower end surface of the attractor by finishing . The said finishing process forms so that the surface by the side of the plunger of the said coiling coil may be located in a groove | channel side rather than the groove opening surface of the said groove | channel for coil mounting. Manufacturing method of vacuum cleaner. An electromagnetic valve comprising the attractor according to any one of claims 1 to 3 .

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