JP4846508B2 - Control valve for fluid pipe - Google Patents

Description

  The present invention includes a case that is connected to a perforation formed in a fluid pipe and water-tightly covers the outer periphery of the fluid pipe, and a valve body that is moved up and down in the case by rotation of a non-lifting turning screw. The present invention relates to a water control valve for a fluid pipe that has a fluid pipe and blocks a flow path of the fluid pipe.

  When repairing various fluid pipes such as waterworks, in order to reduce the water shutoff area as much as possible, a perforation for inserting a valve element is drilled in the fluid pipe in an uninterrupted water state, and this case is in a watertight communication with the perforation. In order to stop the water in the fluid pipe by disposing the valve body and inserting the valve body into the fluid pipe from the perforation and fixing the valve body, the water control valve having the above case and the valve body is used. It is done.

  The valve body of the above-described water control valve is disposed so as to face the upstream and downstream sides of the fluid pipe, a base portion in which an insertion hole for inserting a rotation screw is formed, a lid portion that closes a perforation extending from the base portion, and a fluid pipe. In this way, there is provided a valve plate portion extending from the base portion, and a rubber portion that covers the cover portion and substantially the entire surface of the valve plate portion. In general, the fluid pipe is closed so as to be closed in a water-stopped state.

  When the water in the fluid pipe is stopped, for example, the rubber part is covered with the lower part of the valve plate part in a non-adhesive state, so that the valve body is separated from the fluid pipe when the valve body is partitioned. In some cases, the rubber portion coated in a state is likely to follow the inner peripheral surface of the fluid pipe so as to be easily swelled to improve the water tightness of the fluid pipe and the valve body (see Patent Document 1). ).

  Further, as shown in FIGS. 7A to 7C, it is composed of divided cases 110, 111, and 112 fastened by bolts and nuts 114 so as to cover the outer surface of the fluid pipe 105 having the perforations 107 in a watertight manner. A case 115 is provided, and a base 101 having an insertion hole 108 into which the rotation screw 106 is inserted so as to be accommodated in the case 115, and a lid for closing the perforation of the fluid pipe 105 extending in the base 101. A portion 102, a pair of valve plate portions 103, 103 extending from the base portion 101 so as to face the upstream and downstream sides, and a space between the opposing surfaces of the pair of valve plate portions 103, 103 and a lid portion. A valve body 100 comprising a rubber portion 104 sandwiched between the sandwiched portions 116 has been devised (see Patent Document 2).

Japanese Utility Model Publication No. 64-3908 (page 2, Fig. 1) Japanese Utility Model Publication No. 63-4859 (2nd page, Fig. 6)

  However, in Patent Document 1, the portion where the rubber portion is covered in a non-adhered state is limited to the lower portion of the valve plate portion, and the valve plate portion excluding this lower portion is bonded to the rubber portion. Since the rubber part is easy to bulge out in a non-adhered part and an adhesive part, it is difficult to ensure uniform water tightness over the inner peripheral surface of the fluid pipe. is there.

  Further, in Patent Document 2, the valve body 100 described in Patent Document 2 including the rubber portion 104 in the holding portion 116 surrounded by the pair of valve plate portions 103 and 103 and the lid portion 102 described above, Since the rubber portion 104 is only sandwiched between the opposing surfaces of the valve plate portions 103 and 103 and is not in an adhesive state, the rubber portion 104 is separated from the fluid pipe 105 when the valve body 100 is partitioned from the fluid pipe 105. In addition, the rubber plate 104 and the fluid pipe 105 cannot obtain high water tightness in such a case. Since the problem and the part other than the upper surface of the lid part and the opposing surface of the valve plate part are not covered with the rubber part 104, when the lid part or the valve plate part is made of cast metal or steel, fluid in the pipe Corrosion caused by There is a problem.

  The present invention has been made paying attention to such problems, and when the valve body is partitioned toward the fluid pipe, the rubber part elastically deforms following the inner peripheral surface of the fluid pipe. Therefore, an object of the present invention is to provide a water pipe control valve for a fluid pipe with good corrosion resistance that can maintain sufficient water tightness over the inner peripheral surface of the fluid pipe.

In order to solve the above-described problem, a water pipe water control valve according to claim 1 of the present invention provides:
A case communicating with the perforation formed in the fluid pipe and water-tightly covering the outer periphery of the fluid pipe; and a valve body that is moved up and down in the case by the rotation of a non-lifting turning screw; A water pipe water control valve for blocking a flow path of the fluid pipe,
The valve body extends from the base so that an insertion hole for inserting the rotation screw is formed, a lid that extends from the base and closes the perforation, and is opposed to the upstream and downstream sides. A pair of valve plate portions formed between the pair of valve plate portions and the opposed surfaces of the pair of valve plate portions and covering at least the surface of the valve plate portion and the surface of the lid portion, A rubber portion that is in watertight contact with the surface and the peripheral surface of the perforation, and
The valve plate portion is covered with the rubber portion through a release agent.
According to this feature, since the rubber portion is not in close contact with the valve plate portion by the release agent, when the valve body is partitioned toward the fluid tube by the rotation of the rotation screw, the fluid tube It is easy to elastically deform following the inner peripheral surface. In particular, since the rubber portion is sandwiched between the valve plate portions disposed opposite to the upstream and downstream sides, the rubber portion swells in the radial direction, that is, toward the inner peripheral surface of the fluid pipe, and is sufficient over the inner peripheral surface of the fluid pipe. Can maintain water tightness. Further, by covering the surfaces of the valve plate portion and the lid portion with the rubber portion, even when the valve plate portion and the lid portion are made of a casting or a steel material, corrosion due to the fluid in the pipe can be prevented.

A water pipe water control valve according to claim 2 of the present invention is the fluid pipe water control valve according to claim 1,
The rubber portion sandwiched between the opposing surfaces of the valve plate portion is formed such that an outer periphery thereof bulges in a radial direction from the valve plate portion, and is sandwiched between the opposing surfaces of the valve plate portion. It is characterized in that a size between the opposing surfaces of the rubber part is formed larger than a bulging dimension of the rubber part bulging in a radial direction from the valve plate part.
According to this feature, the rubber part that is in contact with the inner peripheral surface of the fluid pipe is formed such that the dimension between the opposing faces of the valve plate part is larger than the bulge dimension that bulges from the valve plate part. The rubber part is stable with respect to the longitudinal direction of the fluid pipe, and the water tightness can be maintained against the water flow and pressure in the pipe.

The fluid pipe water control valve according to claim 3 of the present invention is the fluid pipe water control valve according to claim 1 or 2,
The rubber part is further formed so as to cover the surface of the base part.
According to this feature, since the base portion is covered with the rubber portion together with the valve plate portion and the lid portion constituting the valve body, the valve plate portion, the lid portion and the base portion are integrally formed of a casting or a steel material. Even in this case, corrosion due to the fluid in the pipe can be prevented.

The water pipe control valve according to claim 4 of the present invention is the fluid pipe control valve according to claim 3,
The insertion hole penetrates the base portion in the up-down direction between the opposing surfaces of the valve plate portion, and the rubber portion continues from the outer surface of the valve plate portion, the lid portion, and the base portion. The inner peripheral surface of the insertion hole is covered along the vertical direction, and is further covered continuously to the valve plate portion.
According to this feature, the rubber portion covers the inner peripheral surface of the insertion hole continuously penetrating from the outer surface of the valve plate portion, the lid portion, and the base portion in the vertical direction, and further continuously to the valve plate portion. Covered, i.e., the outer surface of the valve plate part, lid part, and base part constituting the valve body and the inner peripheral surface of the insertion hole are endlessly covered. Does not come off from the valve plate, the lid, and the base.

The fluid pipe water control valve according to claim 5 of the present invention is the fluid pipe water control valve according to claim 4,
The rubber part is characterized in that an accommodation hole that communicates with the insertion hole and accommodates at least the lower part of the rotating screw is formed between the opposing surfaces of the valve plate part.
According to this feature, when the valve body is raised by the rotation of the rotation screw, at least the lower part of the rotation screw can be accommodated in the accommodation hole of the rubber portion, so that the overall height of the valve body can be kept low.

A fluid pipe water control valve according to claim 6 of the present invention is the fluid pipe water control valve according to any one of claims 1 to 5,
A flange portion extending in the vertical direction is extended on the outer surface on the upstream and downstream sides of the base portion so as to contact the inner surface of the case.
According to this feature, the valve body is used as a reaction force by contacting the flange extending along the vertical direction on the outer surface on the upstream and downstream sides of the base with the inner surface of the case, and by the fluid in the fluid pipe. The valve body can be stabilized against the pressure applied to the valve body.

  BEST MODE FOR CARRYING OUT THE INVENTION A best mode for carrying out a water pipe water control valve according to the present invention will be described below based on examples.

  An embodiment of the present invention will be described with reference to the drawings. First, FIG. 1 is a perspective view showing an overall image of a water pipe water control valve in an embodiment of the present invention. FIG. 2 is a partial cross-sectional view of the water control valve as viewed from the side. FIG. 3 is a partial cross-sectional view of the water control valve as viewed from the front. Fig.4 (a) is a side view which shows a valve body, (b) is a front view which shows a valve body. FIG. 5 is a perspective view showing an overall image of the water control valve when the pipe line is shut off. Fig.6 (a) is a side view which shows the valve body in a modification, (b) is a front view which shows a valve body.

  As shown in FIGS. 1 to 3, the water control valve 10 of the present embodiment mainly communicates with a substantially circular perforation Q formed in the upper surface of the fluid pipe 1 so as to surround the outer periphery of the fluid pipe 1. It has a case 2 covered in a water-tight manner and a valve body 5 that is moved up and down in the case 2 by the rotation of the rotation screw 4 and shuts off the conduit of the fluid pipe 1 as will be described later.

  The case 2 that is in communication with the perforation Q of the fluid pipe 1 and is fixedly attached to the outer peripheral surface of the fluid pipe 1 is a so-called split T-shaped pipe, and has an inner space in the vertical direction that communicates substantially coaxially with the perforation Q. The branch pipe 12 and the valve lid 3, and the flange 11 covering the lower side of the outer periphery of the fluid pipe 1. The branch pipe 12 and the flange 11 are fastened by a plurality of bolts and nuts 13 arranged along the longitudinal direction of the fluid pipe. Here, a circumferential portion 17 along the circumferential direction at both ends of the longitudinal direction of the fluid pipe 1 in the flange 11 and the branch pipe 12 so as to prevent overflow from the case 2 due to a water flow or the like flowing in the fluid pipe 1, A packing made of an elastic material composed of a longitudinal portion 18 along the direction and a rubber ring 22 along the outer periphery of the perforation Q are provided along the inner surface of the flange 11 or the branch pipe 12. Then, after attaching the flange 11 and the branch pipe 12 to the fluid pipe 1, the plug 15 is opened, and water pressure is applied in the case 2, so that the outer surface of the fluid pipe 1 and the inner face of the flange 11 and the branch pipe 12 are Check the water tightness of the gap as appropriate.

  The valve lid 3 has an outer diameter smaller than the inner diameter of the branch pipe 12, and the lower part of the valve lid 3 is fitted along the inner peripheral surface of the branch pipe 12. The bottom surface and the outer peripheral surface of the valve lid 3 are in contact with the upper surface and the inner peripheral surface of the branch pipe 12, respectively, and the outer peripheral surface of the lower portion of the valve lid 3 is flexible so as to increase the water tightness of the contact surface. A material O-ring 19 is provided. Further, a ring-shaped flange 9 is inserted into the valve lid 3 so as to place the valve lid 3, and the flange 9 and the branch pipe 12 are fastened with bolts and nuts 14 while positioning with the sinking plug 16. An insertion hole 32 is formed in the top of the valve lid 3.

  The rotation screw 4 is rotatably attached to the insertion hole 32 of the valve lid 3 so that the upper end protrudes outside the valve lid 3. The holding plate 33 is fixed to the upper end surface of the valve lid 3 with a bolt 20 and prevents the rotation screw 4 from being pulled out. With the above configuration, the rotating screw 4 is rotatable in both forward and reverse directions with respect to the case 2 but does not move up and down. Reference numeral 4b denotes a screw portion having a circumferential surface screwed over substantially the entire length except for the upper end portion of the rotating screw 4. The screw top 25 is fitted in a guide groove 21 formed in the upper end portion of the valve body 5 to be described later, and is screwed into the screw portion 4b. When the operation portion 4a is rotated, the screw portion 4b is rotated accordingly, so that the valve body 5 can be moved up and down following the screw top 25.

  Next, the valve body 5 constituting the water control valve 10 will be described in detail.

  As shown in FIGS. 4A and 4B, the valve body 5 includes a valve body 6 formed of a casting, a steel material, or the like, and a rubber body 7 formed of an elastic body as a rubber portion. The valve main body 6 includes a base portion 6a in which an insertion hole 31 into which the screw portion 4b of the rotating screw 4 is inserted, a lid portion 6b extending from the base portion 6a and closing the perforation Q of the fluid pipe 1, and the fluid pipe 1 It consists of a pair of valve-plate parts 6c and 6c extended from the base 6a so that it may oppose on the upstream and downstream sides.

  Further, on the outer surface on the upstream / downstream side of the base portion 6a of the valve body 6, the flange portions 8 and 8 along the vertical direction are provided in the vertical direction on the inner surface of the valve lid 3 or the branch pipe 12 constituting the case 2. (Not shown) extends in a slidable manner.

  The rubber body 7 is sandwiched between the opposed surfaces of the pair of valve plate portions 6c, 6c, and bulges in the radial direction from the tube-axis-direction valve plate portion 6c, so that the valve plate portions 6c, 6c, the lid portion 6b, and It is formed so as to cover substantially the entire surface of the base portion 6a, and is in watertight contact with the inner peripheral surface of the fluid pipe 1 and the peripheral surface of the perforation Q. Further, the valve plate portion 6c is covered with a rubber body 7 via a release agent applied to substantially the entire surface (shaded portion in the figure) of the valve plate portion 6c. The close contact with the rubber body 7 is prevented. 1 and 5, for the sake of convenience, the front surface (front surface in the figure) of the valve plate portion 6c is shown without being covered with the rubber body 7, but in reality, the valve body 6 is not covered with the rubber body 7 as described above. It covers substantially the entire surface including the front surface of the plate portion 6c.

  By doing so, since the rubber body 7 is not in close contact with the valve plate portion 6c by the release agent, the valve body 5 is partitioned toward the fluid pipe 1 by the rotation of the rotation screw 4. At this time (see FIG. 5), the fluid pipe 1 tends to elastically deform following the inner peripheral surface. In particular, since the rubber body 7 is sandwiched between the valve plate portions 6c and 6c disposed opposite to the upstream and downstream sides, the bulging toward the upstream and downstream sides of the rubber body 7 is restricted, and the radial direction, that is, the fluid It swells toward the inner peripheral surface of the pipe 1, and the water tightness can be sufficiently maintained over the inner peripheral surface of the fluid pipe 1.

  Further, even when the valve plate portion 6c, the lid portion 6b, and the base portion 6a are integrally formed of a casting or a steel material, the base portion 6a is combined with the rubber body 7 together with the valve plate portion 6c and the lid portion 6b constituting the valve body 6. Since it is coated, corrosion due to the fluid in the pipe can be prevented.

  In addition, as a method of covering the rubber body 7 on substantially the entire surface of the valve body 6 in which the valve plate portion 6c, the lid portion 6b, and the base portion 6a are integrally formed of a casting, a steel material or the like, for example, a predetermined value is applied from the outer surface of the valve body 6 The valve body 6 is accommodated inside a mold member (not shown) having an inner surface enlarged to a core member (not shown) made of a cylindrical shape having a diameter smaller than the inner diameter of the insertion hole 31 of the valve body 6. Is inserted into the insertion hole 31, and rubber that has been deformed by heating is poured into a gap formed between the inner surface of the mold member and the outer surface of the core member and the entire surface of the valve body 6. By vulcanization, a known means for coating the rubber body 7 as desired on substantially the entire surface of the valve body 6 can be employed.

  The insertion hole 31 formed in the base portion 6a penetrates vertically between the opposing surfaces of the valve plate portions 6c, 6c, and the rubber body 7 is formed outside the valve plate portion 6c, the lid portion 6b, and the base portion 6a. The inner peripheral surface of the insertion hole 31 is continuously covered from the surface, and is further continuously covered between the opposing surfaces of the valve plate portions 6c and 6c. The rubber body 7 is formed with an accommodation hole 34 that communicates with the insertion hole 31 and accommodates at least the lower part of the rotating screw 4 between the opposing surfaces of the valve plate portions 6c and 6c.

  By doing in this way, the rubber body 7 covers the inner peripheral surface of the insertion hole 31 that continuously penetrates from the outer surface of the valve plate portion 6c, the lid portion 6b, and the base portion 6a in the vertical direction, and is further continuous. Thus, the valve plates 6c, 6c are covered to the opposite surfaces, that is, the outer surfaces of the valve plate 6c, the lid 6b, the base 6a constituting the valve body 6 and the inner peripheral surface of the insertion hole 31 are endless. Therefore, the rubber body 7 is not detached from the valve body 6 even by the pressure of the fluid in the pipe.

  The function of the water control valve 10 having the above configuration will be described. As shown in FIGS. 1 and 5, the water control valve 10 is configured so that the flanges 8, 8 are moved to the case by the rotation of the non-lifting rotation screw 4. 2 The inside of the case 2 is moved up and down together with the screw top 25 screwed into the screw portion 4b while stopping its own rotation by contacting the inner wall (not shown) of the groove portion provided on the inner surface. When the water control valve 10 is raised in the case 2, a part of the rotating screw 4 can be accommodated in the insertion hole 31 and the accommodation hole 34 communicating with the insertion hole 31. (See FIG. 4).

  By doing in this way, when raising the valve body 5 by the rotation of the rotation screw 4, at least the lower part of the rotation screw 4 can be accommodated in the accommodation hole 34 of the rubber body 7. It can be kept low.

  Further, when the valve body 5 is lowered in the case 2, the rubber body 7 that is sandwiched between the opposed surfaces of the valve plate portions 6c and 6c and bulges in the radial direction from the valve-axis direction valve plate portion 6c is formed. The rubber body 7 covering the inner peripheral surface of the fluid pipe 1 in the circumferential direction and covering the lid portion 6b is in watertight contact with the peripheral surface of the perforation Q of the fluid pipe 1. The fluid pipe 1 is blocked.

  When partitioning the valve body 5 toward the fluid pipe 1, the rubber body 7 is not in close contact with the valve plate portion 6c by the release agent, so that the rubber body 7 is not restrained and the degree of freedom is increased. It is easy to elastically deform following the inner peripheral surface of the fluid pipe 1. In particular, since the rubber body 7 is sandwiched between the valve plate portions 6c and 6c disposed opposite to the upstream and downstream sides of the fluid pipe 1, the rubber body 7 swells toward the upstream and downstream sides of the fluid pipe 1. Therefore, it swells in the radial direction, that is, toward the inner peripheral surface of the fluid pipe 1, and the water tightness can be sufficiently maintained over the inner peripheral surface of the fluid pipe 1.

  Moreover, as shown to Fig.4 (a), the dimension X between opposing surfaces of the protrusion part R of the rubber body 7 clamped between the opposing surfaces of valve-plate part 6c, 6c is radial direction from the valve-plate part 6c. It is preferable that the bulging dimension Y of the bulging rubber body 7 is larger. By doing in this way, in the rubber body 7 which contacts over the inner peripheral surface of the fluid pipe 1, the dimension X between the opposed surfaces of the valve plate portions 6c, 6c bulges out from the valve plate portion 6c. The rubber body 7 is stabilized with respect to the longitudinal direction of the fluid pipe 1 and can maintain water tightness against the water flow and pressure in the fluid pipe 1.

  Further, the flanges 8, 8 extending in the vertical direction on the outer surfaces of the upstream and downstream sides of the base portion 6 a are brought into contact with the inner surface of the case 2, so that the fluid in the fluid pipe 1 is used as a reaction force. Thus, the valve body 5 can be stabilized against the pressure received by the valve body 5.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  In the above embodiment, the rubber body 7 is formed by covering the surfaces of the base portion 6a, the lid portion 6b, and the valve plate portion 6c constituting the valve main body 6 over almost the entire surface. As shown in FIGS. 6A and 6B, the rubber body 7 ′ is formed in a bag shape so as to cover substantially the entire surface of the valve plate portion 6c and substantially the entire surface of the lid portion 6b. The release agent may be applied to substantially the entire surface of the plate portion 6c. By doing in this way, similarly to the said Example, even when the valve-plate part 6c and the cover part 6b are comprised with a casting, steel materials, etc., the corrosion by the fluid in a pipe | tube can be prevented.

  Further, in this modification, the insertion hole 31 ′ formed in the base portion 6a of the valve body 6 does not penetrate the base portion 6a like the insertion hole 31 in the above embodiment, that is, from the upper end portion of the base portion 6a. It has an inner bottom surface 31a 'at a predetermined depth. By doing in this way, compared with the case where the insertion hole penetrating the base portion 6a is formed, the rigidity of the valve body 6 is maintained without making the lower portion from the inner bottom surface 31a 'of the base portion 6a an inner space portion. Can do.

It is a perspective view which shows the whole image of the water control valve | bulb of the fluid pipe | tube in the Example of this invention. It is the partial sectional view which looked at the water control valve from the side. It is the partial sectional view which looked at the water control valve from the front. (A) is a side view which shows a valve body, (b) is a front view which shows a valve body. It is a perspective view which shows the whole image of the water control valve at the time of pipe line interruption | blocking. (A) is a side view which shows the valve body in a modification, (b) is a front view which shows a valve body. (A) is the partial cross section figure which looked at the water control valve in a prior art example from the front, (b) is a front view which shows a valve body, (c) is a side view which shows a valve body. .

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fluid pipe 2 Case 3 Valve cover 4 Rotation screw 4a Rotation operation part 4b Screw part 5 Valve body 6 Valve body 6a Base part 6b Cover part 6c Valve plate part 7, 7 'Rubber body (rubber part)
8 flange 9 flange 10 water control valve 11 flange 12 branch pipe 13 T head bolt / nut 14 bolt / nut 15 plug 16 sinking plug 17 packing circumferential portion 18 packing longitudinal portion 19 O-ring 20 bolt 21 guide groove 22 rubber Ring 25 Screw top 31, 31 ′ Insertion hole 31 a ′ Inner bottom surface 32 Insertion hole 33 Holding plate 34 Holding hole Q Perforation R Protrusion X Opposite surface dimension Y Swelling dimension

Claims (6)

A case communicating with the perforation formed in the fluid pipe and water-tightly covering the outer periphery of the fluid pipe; and a valve body that is moved up and down in the case by the rotation of a non-lifting turning screw; A water pipe water control valve for blocking a flow path of the fluid pipe,
The valve body extends from the base so that an insertion hole for inserting the rotation screw is formed, a lid that extends from the base and closes the perforation, and is opposed to the upstream and downstream sides. A pair of valve plate portions formed between the pair of valve plate portions and the opposed surfaces of the pair of valve plate portions and covering at least the surface of the valve plate portion and the surface of the lid portion, A rubber portion that is in watertight contact with the surface and the peripheral surface of the perforation, and
The water valve according to claim 1, wherein the valve plate part is covered with the rubber part through a release agent.   The rubber portion sandwiched between the opposing surfaces of the valve plate portion is formed such that an outer periphery thereof bulges in a radial direction from the valve plate portion, and is sandwiched between the opposing surfaces of the valve plate portion. 2. The fluid pipe according to claim 1, wherein a dimension between the opposing surfaces of the rubber part is formed larger than a swelled dimension of the rubber part swelled in a radial direction from the valve plate part. Water control valve.   The fluid control valve for a fluid pipe according to claim 1 or 2, wherein the rubber part is formed so as to further cover the surface of the base part.   The insertion hole penetrates the base portion in the up-down direction between the opposing surfaces of the valve plate portion, and the rubber portion continues from the outer surface of the valve plate portion, the lid portion, and the base portion. 4. The fluid pipe water control valve according to claim 3, wherein an inner peripheral surface of the insertion hole is covered along the vertical direction, and further, the valve plate portion is continuously covered.   The said rubber | gum part is formed with the accommodation hole which accommodates at least the lower part of the said rotation screw while communicating with the said insertion hole between the opposing surfaces of the said valve-plate part. Water pipe water control valve.   The fluid according to any one of claims 1 to 5, wherein a flange portion extending in a vertical direction is extended on an outer surface on the upstream and downstream side of the base portion so as to contact an inner surface of the case. Pipe water control valve.

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