JPH1047527A - Solenoid valve - Google Patents

Solenoid valve

Info

Publication number
JPH1047527A
JPH1047527A JP20689096A JP20689096A JPH1047527A JP H1047527 A JPH1047527 A JP H1047527A JP 20689096 A JP20689096 A JP 20689096A JP 20689096 A JP20689096 A JP 20689096A JP H1047527 A JPH1047527 A JP H1047527A
Authority
JP
Japan
Prior art keywords
valve
port
solenoid valve
diameter
unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP20689096A
Other languages
Japanese (ja)
Inventor
Katsuyuki Ito
Naoki Ito
Norito Watanabe
勝之 井藤
直紀 伊藤
憲人 渡辺
Original Assignee
Ckd Corp
シーケーディ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ckd Corp, シーケーディ株式会社 filed Critical Ckd Corp
Priority to JP20689096A priority Critical patent/JPH1047527A/en
Publication of JPH1047527A publication Critical patent/JPH1047527A/en
Pending legal-status Critical Current

Links

Abstract

(57) [Problem] To provide an electromagnetic valve in which a valve body of an electromagnetic valve can be replaced without removing an air pipe, and there is no danger of leakage even when re-installed. SOLUTION: An electromagnetic valve unit 41 detachably attached to a main body 21 includes: (a) a common port 13;
A, a first valve seat 43 formed in a flow path connecting the A port and the NC port 17A, and (b) a common port 13A and a NO port 2
0A and a second valve seat 44 formed in a flow path communicating with 0A.
(C) First valve body 39 that comes into contact with or separates from first valve seat 43
(E) the second valve body 38 which comes into contact with or separates from the second valve seat 44, and (f) the first valve body 39 and the second valve body 38 are moved by being excited by exciting the coil 12. And a movable iron core 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic valve capable of replacing an electromagnetic valve body without removing a pipe tube connected to a port.

[0002]

2. Description of the Related Art Conventionally, a three-port solenoid valve having a common port, an NC port that communicates with the common port when energized, and a NO port that is cut off from the common port when energized is well known. FIG. 7 is a sectional view showing the structure of a conventional three-port solenoid valve. FIG. 8 is a sectional view taken along line AA of FIG. As shown in FIG. 7, a copper wire is wound around the hollow bobbin 106 to form a coil. A fixed iron core 104 is fixedly provided on the hollow upper side of the hollow bobbin 106. Also, the hollow bobbin 106
A movable iron core 107 is slidably fitted to the lower side of the hollow. The movable iron core 107 is urged downward by a return spring 105.

[0003] A valve member 110 is fixed to the movable iron core 107 by a connecting rod 108. Therefore, the valve member 1
10 always moves integrally with the movable iron core 107. Further, the valve body member 110 is urged upward by a return spring 111. As shown in FIG. 7, a common port 102 and an NC port 101 are formed in the valve body 112. As shown in FIG. 8, the valve body 112 has the NO port 103 formed therein. Also, the common port 102 and N
The flow path communicating with the C port 101 includes a first valve seat 113.
Are formed. In addition, a flow path communicating the common port 102 and the NO port 103 has a second valve seat 10 facing downward.
9 are formed. Then, on the upper surface of the valve body member 110, the second valve body portion 1 which comes into contact with or separates from the second valve seat 109 is provided.
The first valve body 110b is formed on the lower surface of the valve body member 110 so as to contact or separate from the first valve seat 113.

Next, the operation of the conventional three-port solenoid valve having the above configuration will be described. FIG. 7 shows a state where the coil is not energized. In this state, since the strength of the return spring 105 is stronger than that of the return spring 111, the movable iron core 107 and the valve body member 110 are urged downward, and the first valve body portion 110b of the valve body member 110 is moved to the first valve seat. 113, and the common port 102 and the NC port 101 are shut off. Further, since the second valve body 110a is separated from the second valve seat 109, the common port 102 and the NO port 103 communicate with each other. Next, when the coil is energized, the movable core 107 is attracted to the fixed core 104. Thereby, the valve body member 110 moves upward, and the second valve body portion 110a
Is in contact with the second valve seat 109, and the first valve body 110b is separated from the first valve seat 113. Thereby, the common port 10
2 and the NC port 101 are communicated with each other, and the common port 102
And the NO port 103 are shut off.

[0005]

However, the conventional three-port solenoid valve has the following problems. That is, in the solenoid valve, cleaning or replacement of parts or replacement of the solenoid valve may be required depending on the life or mixing of foreign matter. At this time, in the conventional solenoid valve, the NC port 101,
Since the piping tube is directly connected to the female screw portion formed in the common port 102 and the NO port 103 by the male screw connecting member, the solenoid valve cannot be replaced unless all the piping tubes are removed, so that the work is troublesome. The efficiency was poor. In recent years, in semiconductor manufacturing lines, etc., the arrangement of solenoid valves and the like has also been increasing in density, and it is often difficult to remove the piping, so extra work such as removing other equipment to replace the solenoid valve is required. There was such a problem.

On the other hand, when the solenoid valve is to be replaced without removing the piping tube, for example, the solenoid valve is replaced with a movable iron core.
A method of integrally removing the valve member from the main body can be considered. As an example, in the case of a 2-port valve, the actual fairness 6-36
No. 374 discloses that a sub-assembly up to a valve body is stopped by a retaining ring. However, in the technique of Japanese Utility Model Publication No. 6-36374, the valve body is separated from the valve seat to thereby remove the solenoid valve portion. However, the valve body and the valve seat become familiar when used. When the valve body and the valve seat are separated and reassembled, fluid leakage or the like may occur. That is, the valve body is generally made of an elastic material such as rubber, and a scar on the valve seat is formed by use. When detached and reassembled, the position of the scar is shifted from the conventional one, so that leakage occurs.
If the valve body is replaced at the time of reassembly, this problem is eliminated. However, it is a problem when the valve body and the like are inspected and judged that they can still be used, and re-assembled.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and to provide an electromagnetic valve in which the valve body of the electromagnetic valve can be replaced without disconnecting the air pipe, and there is no danger of leakage when re-installed. With the goal.

[0008]

The solenoid valve according to the present invention has the following configuration. (1) An electromagnetic valve including a main body in which a common port, a first output port, and a second output port are formed, and an electromagnetic valve unit. Then, the solenoid valve unit is provided with a (a) first valve seat formed in a flow path connecting the common port and the first output port, and (b) a flow path connecting the common port and the second output port. A second valve seat formed, (c) a first valve body that comes into contact with or separates from the first valve seat, (e) a second valve body that comes into contact with or separates from the second valve seat, and (f) It has a movable core that is attracted by exciting the coil and moves the first valve body and the second valve body.

(2) In the solenoid valve described in (1),
A tapered three-level step is formed in the solenoid valve unit,
Each of the common port, the first output port, and the second output port is formed in each of the steps. (3) In the solenoid valve described in (1) or (2),
In order to remove the solenoid valve unit from the main body, a small distance moving means for moving the solenoid valve unit by a small distance is provided.

[0010] The solenoid valve having the above configuration operates as follows. The case where the solenoid valve is inspected will be described. In the solenoid valve of the present invention, the piping tube has a threaded joint at the common port, the first output port, and the second output port of the main body.
They are connected by one-touch joints or the like. Usually, since the solenoid valves are arranged in a concentrated manner, removing the piping tube is a troublesome and time-consuming operation. When removing the valve body of the solenoid valve of the present invention, it is not necessary to remove the piping tube connected to the main body.

That is, the mounting bolt is removed from the upper side, and the solenoid valve unit is moved from the main body by a short distance moving means to the main body.
mm upward. In a solenoid valve, since lubricating oil is slightly mixed into air, the oil component may be solidified and the solenoid valve unit may be fixed to the main body. In such a case, if a force is applied to the electromagnetic valve unit to force it to be removed, the O-ring for preventing leakage may be damaged. Even if the solenoid valve unit is stuck to the main body, it can be released by a small movement by the small distance moving means, so that the solenoid valve unit can be detached from the main body without applying any force afterwards. it can. The solenoid valve unit includes two valve seats, two valve bodies, and three ports, which are integrally removed.

The solenoid valve unit has three steps (large diameter, medium diameter,
The small-diameter portion has three ports, each of which is formed with three ports, and an O-ring is mounted around the port. Sometimes, there is no contact with the inner wall surface corresponding to the large diameter portion, and because the O-ring of the small diameter portion does not contact the inner wall surface corresponding to the large diameter portion and the middle diameter portion,
The possibility that the O-ring is damaged can be reduced. By removing the solenoid valve unit, the user can move to a work place or the like to perform a fine work. When there is no abnormality in the solenoid valve unit and the solenoid valve unit is reinserted into the main body, the O-ring of the small diameter portion does not come into contact with the inner wall surfaces corresponding to the large diameter portion and the medium diameter portion. Since the O-ring of the diameter portion can be reinserted without contacting the inner wall surface corresponding to the large-diameter portion, the possibility that the O-ring is damaged can be reduced.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a solenoid valve according to an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view showing the entire configuration of the solenoid valve 11. FIG. 2 is a partial cross-sectional view of the side surface of FIG. FIG. 5 is a sectional view of the main body 21, and FIG. 4 is a sectional view of the solenoid valve unit 41. First, the main body 21 will be described. As shown in FIGS. 1 and 5, the main body has a large-diameter portion 21 which is three steps.
b, a medium diameter portion 21c, and a small diameter portion 21d are sequentially formed. Then, as shown in FIGS. 1 and 5, the large diameter portion 21b
Is formed with an NC port 17, and a common port 13 is formed in the middle diameter portion 21c. Also, as shown in FIG. 2, a NO port 20 is formed in the small diameter portion 21d. Common port 13, NC port 17, NO port 20
Has a female thread, and a piping tube (not shown) is connected to each port by a male thread piping member.

Next, the configuration of the solenoid valve unit 41 will be described with reference to FIGS. As shown in FIG. 1 and FIG. 4, a coil 12 is formed by winding a copper wire around a hollow bobbin. A fixed iron core 15 is provided above the hollow bobbin.
Is fixed. Also, on the lower side of the hollow bobbin,
The movable iron core 16 is slidably fitted. Movable iron core 1
6 is urged downward by a return spring 19. A unit body 22 having a hollow portion formed therein is fixedly provided below the coil portion. The valve body member 23 is connected to the movable iron core 16 by a connecting rod 40. The valve member 23 is slidably held in the hollow portion of the unit body 22. Therefore, the valve element member 23 is
And always move together. The lower end of the hollow portion of the unit body 22 is sealed by a sealing member 36 that holds the O-ring 24 for preventing leakage. The sealing member 36 is fixed to the unit body 22 by the retaining ring 25. Also,
A return spring 35 is supported above the sealing member 36. The return spring 35 urges the valve body member 23 upward.

As shown in FIGS. 1, 2 and 4, on the outer periphery of the unit body 22, three large-diameter portions 22b, a middle-diameter portion 22c and a small-diameter portion 22d corresponding to the main body 21 are provided. Is formed. An NC port 17A is formed in the large diameter portion 22b at a position communicating with the NC port 17. Further, a common port 13A is formed in the middle diameter portion 22c at a position communicating with the common port 13. Also,
The small-diameter portion 22d has an N at a position communicating with the NO port 20.
An O port 20A is formed. Also, common port 1
A first valve seat 43 is formed in a flow path connecting the 3A and the NC port 17A. Also, the common ports 13A and N
A second valve seat 44 is formed downward in the flow path communicating with the O port 20A. A first valve body 39 that contacts or separates from the first valve seat 43 is provided below the movable iron core 16.
Is fixed. In addition, a second valve body 38 that comes into contact with or separates from the second valve seat 44 is fixed to the upper surface of the valve body member 23.

The solenoid valve unit 41 is detachably fixed to the main body 21 by mounting bolts 18. FIG.
Alternatively, as shown in FIG.
On the upper side of 2b, a detachment step 45 is formed. As shown in FIG. 2, an eccentric knob 46 serving as a small-distance moving means is rotatably held on the upper part of the main body 21 by a holding member 21a. The appearance of the eccentric knob 46 is shown in FIG. (A) is a front view, and (b) is a partial view of the right side thereof. The knob 26 extends out of the main body 21. An eccentric piece 27 is formed at the tip. The eccentric piece 27 is in contact with the removal step 45. In a state where the solenoid valve unit 41 is attached to the main body 21,
The eccentric piece 27 is located on the lower side.

Next, the operation of the solenoid valve 11 having the above configuration will be described. FIG. 1 shows a state in which the coil 12 is not energized. In this state, since the strength of the return spring 19 is stronger than the return spring 35, the movable iron core 16 and the valve body member 23 are urged downward, and the first valve body 39 is in contact with the first valve seat 43. , The common port 13A and the NC port 17A are shut off. Also, since the second valve body 38 is separated from the second valve seat 44, the common port 13A and the NO port 20A
And are in communication. Next, FIG.
Shown in That is, the movable core 16 is attracted to the fixed core 15. Thereby, the movable iron core 16 and the valve member 23 move upward, the second valve body 38 comes into contact with the second valve seat 44, and the first valve body 39 is separated from the first valve seat 43. Thereby, the common port 13A communicates with the NC port 17A, and the common port 13A and the NO port 20A are shut off.

Next, a case where the solenoid valve 11 is inspected will be described. In the solenoid valve 11 of the present invention, the piping tube is connected to the common port 13, the NC port 17, and the NO port 20 of the main body 21 with a screw joint. Usually, since the solenoid valves are arranged in a concentrated manner, removing the piping tube is a troublesome and time-consuming operation. The solenoid valve 11 of the present invention has an advantage that it is not necessary to remove the piping tube connected to the main body 21 when removing the valve body.

That is, the mounting bolt 18 is removed from the upper side, and the knob 26 is rotated by 180 degrees, so that the eccentric piece 27 pushes up the electromagnetic valve unit 41 through the removing step 45, and the electromagnetic valve unit 41 is moved to the main body. Move upward by 1 to 2 mm from 21. At this time, eccentric piece 2
7 slightly pushes up the removing step 45, so that there is no possibility that the solenoid valve unit 41 will bite. Generally, in a solenoid valve, since lubricating oil is slightly mixed in air, the oil component may be solidified and the solenoid valve unit may be fixed to the main body. In such a case, if a force is applied to the electromagnetic valve unit to force it to be removed, the O-ring for preventing leakage may be damaged. If the solenoid valve unit 41 is slightly moved by the eccentric knob 46, even if the solenoid valve unit 41 is stuck to the main body 21, the stuck state can be released, so that the solenoid valve unit 41 is detached from the main body 21 without applying force thereafter. can do. In addition, by moving the solenoid valve unit 41 by the eccentric knob 46, the O-ring moves to a large diameter portion of the inner wall surface of the main body, the sliding resistance of the O-ring is eliminated, and the solenoid valve is moved without applying force. The unit 41 can be taken out.

Here, the unit main body 22 has a large-diameter portion 22b, a middle-diameter portion 22c, and a small-diameter portion 22d which are three steps, and an NC port 17A is formed in the large-diameter portion 22b. A common port 13A is formed in the small-diameter portion 22.
Since the NO port 20A is formed in each of the ports d and an O-ring is mounted around the port, the O-ring of the middle diameter portion 22c corresponds to the large diameter portion 22b when the solenoid valve unit 41 is removed. Contact with the inner wall surface of the large-diameter portion 21b, and the O-ring of the small-diameter portion 22d
Large diameter portion 21b corresponding to large diameter portion 22b and medium diameter portion 22c
And does not come into contact with the inner wall surface of the middle diameter portion 21c.
The possibility of damaging the ring can be reduced.

Then, the solenoid valve unit 41 can be removed and moved to a work place or the like to perform a detailed operation. When there is no abnormality in the solenoid valve unit 41 and the solenoid valve unit 41 is re-inserted into the main body 21, the O-ring of the small-diameter portion 22d includes the large-diameter portion 21b corresponding to the large-diameter portion 22b and the middle-diameter portion 22c and the middle portion. There is no contact with the inner wall surface of the diameter part 21c, and the O-ring of the middle diameter part 22c is
Can be reinserted without coming into contact with the inner wall surface of the large-diameter portion 21b, which can reduce the possibility of damage to the O-ring.

As described in detail above, according to the solenoid valve 11 of the present embodiment, the solenoid valve unit 41 which is detachably attached to the main body 21 includes (a) the common port 13A.
A first valve seat 43 formed in a flow path that communicates with the NC port 17A, (b) the common port 13A and the NO port 20
A, a second valve seat 44 formed in a flow path communicating with A,
(C) First valve body 39 that comes into contact with or separates from first valve seat 43
(E) the second valve body 38 which comes into contact with or separates from the second valve seat 44, and (f) the first valve body 39 and the second valve body 38 are moved by being excited by exciting the coil 12. When the valve body is removed, the movable core 16
Since there is no need to remove the piping tube connected to the main body 21, inspection and replacement of the solenoid valve 11 can be performed efficiently in a short time. In addition, even if the same unit is returned after the inspection, the positions of the first valve body 39 and the second valve body 38 do not shift, so that there is no risk of leakage.

According to the solenoid valve 11 of the present embodiment, in the solenoid valve described above, the large-diameter portion 22b, which is a three-step tapered step, is formed on the unit body 22 of the solenoid valve unit 41.
The medium diameter portion 22c and the small diameter portion 22d are formed, and the NC port 1 is formed.
7A is formed in the large diameter portion 22b, the common port 13A is formed in the medium diameter portion 22c, and the NO port 20A is formed in the small diameter portion 22b.
d, the O-ring of the middle diameter portion 22c is
When the solenoid valve unit 41 is removed, there is no contact with the inner wall surface of the large diameter portion 21b corresponding to the large diameter portion 22b, and the O-ring of the small diameter portion 22d corresponds to the large diameter portion 22b and the medium diameter portion 22c. As a result, the possibility of damage to the O-ring can be reduced because the large-diameter portion 21b and the intermediate-diameter portion 21c do not contact the inner wall surfaces. Further, since the distance for receiving the sliding resistance of the O-ring is short, the force applied when the electromagnetic valve unit 41 is taken out and inserted can be reduced. Also,
If there is no abnormality in the solenoid valve unit 41, the solenoid valve unit 4
When re-inserting 1 into the main body 21, the O-ring of the small diameter portion 22d does not come into contact with the inner wall surfaces of the large diameter portion 21b and the medium diameter portion 21c corresponding to the large diameter portion 22b and the medium diameter portion 22c, and Since the O-ring of the middle diameter portion 22c can be reinserted without contacting the inner wall surface of the large diameter portion 21b corresponding to the large diameter portion 22b, the possibility that the O ring is damaged can be reduced.

According to the solenoid valve 11 of the present embodiment, in the solenoid valve, the solenoid valve unit 41 is connected to the main body 2.
Since it has the eccentric knob 46 for moving the solenoid valve unit 41 a small distance to remove it from
The eccentric knob 46 allows the solenoid valve unit 41 to
When the solenoid valve unit 41 is slightly moved with respect to the main body 21, even if the solenoid valve unit 41 is fixed to the main body 21, the fixed state can be released and the position can be moved to a position where the sliding resistance of the O-ring does not receive. The electromagnetic valve unit 41 can be detached from the main body 21 without applying force.

It should be noted that the present invention is not limited to the embodiments described above, and various changes can be made without departing from the spirit of the present invention. For example, in the above embodiment, three steps are provided, but it is natural that the number of steps is changed as necessary. Further, in the present embodiment, the three-port valve of the common port, the NC port, and the NO port has been described. However, the present invention can be used for other three-port valves. Further, in the present embodiment, the electromagnetic valve has been described, but the present invention can be applied to all on-off valves.

[0026]

According to the solenoid valve of the present invention, the solenoid valve unit detachably attached to the main body includes: (a) a first valve seat formed in a flow path communicating between the common port and the first output port. (B) a second valve seat formed in a flow path communicating between the common port and the second output port, (c) a first valve body that abuts or separates from the first valve seat, and (e) Since it has a second valve body that comes into contact with or separates from the second valve seat, and (f) a movable iron core that is attracted by exciting the coil and moves the first valve body and the second valve body. When removing the valve body, it is not necessary to remove the piping tube connected to the main body, so that the inspection and replacement of the solenoid valve can be performed efficiently in a short time. In addition, even if the same unit is returned after inspection, the positions of the first valve body and the second valve body do not shift,
There is no risk of leakage.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an overall configuration of a solenoid valve 11 according to an embodiment of the present invention.

FIG. 2 is a side sectional view of FIG.

FIG. 3 is a cross-sectional view showing a state where power is supplied to a coil 12 of FIG. 1;

FIG. 4 is a sectional view of the solenoid valve unit 41.

FIG. 5 is a sectional view of the main body 21.

6 is an external view of an eccentric knob 46. FIG.

FIG. 7 is a cross-sectional view showing a configuration of a conventional solenoid valve.

FIG. 8 is a side sectional view of FIG. 7;

[Explanation of symbols]

 Reference Signs List 11 solenoid valve 12 coil 16 movable iron core 13A common port 17A NC port 20A NO port 21 main body 21b large diameter portion 21c medium diameter portion 21d small diameter portion 22 unit main body 22b large diameter portion 22c medium diameter portion 22d small diameter portion 23 valve member 38 Double valve 39 First valve 43 First valve seat 44 Second valve seat 46 Eccentric knob

Claims (3)

[Claims]
1. An electromagnetic valve comprising: a main body in which a common port, a first output port, and a second output port are formed; and an electromagnetic valve unit, wherein the electromagnetic valve unit includes the common port and the common port. A first valve seat formed in a flow path communicating with a first output port; a second valve seat formed in a flow path communicating with the common port and the second output port; and the first valve seat. A first valve element that comes into contact with or separates from the first valve element; a second valve element that comes into contact with or separates from the second valve seat; And a movable core for moving the solenoid valve.
2. The solenoid valve according to claim 1, wherein the solenoid valve unit is formed with a tapered three-stage step, wherein each of the common port, the first output port, and the second output port is An electromagnetic valve formed on each step.
3. The solenoid valve according to claim 1, further comprising: a small-distance moving means for moving the solenoid valve unit by a small distance in order to remove the solenoid valve unit from the main body. Characteristic solenoid valve.
JP20689096A 1996-08-06 1996-08-06 Solenoid valve Pending JPH1047527A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20689096A JPH1047527A (en) 1996-08-06 1996-08-06 Solenoid valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20689096A JPH1047527A (en) 1996-08-06 1996-08-06 Solenoid valve

Publications (1)

Publication Number Publication Date
JPH1047527A true JPH1047527A (en) 1998-02-20

Family

ID=16530754

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20689096A Pending JPH1047527A (en) 1996-08-06 1996-08-06 Solenoid valve

Country Status (1)

Country Link
JP (1) JPH1047527A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001182857A (en) * 1999-11-24 2001-07-06 Parker Hannifin Rak Sa Small solenoid valve and manufacturing method
JP2009299886A (en) * 2008-06-16 2009-12-24 Fukuhara Co Ltd Drain water discharging method and discharge valve
JP2011202706A (en) * 2010-03-25 2011-10-13 Fuji Koki Corp Three-way solenoid valve

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001182857A (en) * 1999-11-24 2001-07-06 Parker Hannifin Rak Sa Small solenoid valve and manufacturing method
JP2009299886A (en) * 2008-06-16 2009-12-24 Fukuhara Co Ltd Drain water discharging method and discharge valve
JP2011202706A (en) * 2010-03-25 2011-10-13 Fuji Koki Corp Three-way solenoid valve

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