JP2016160984A - Gate valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gate valve which prevents a slide table from wobbling when receiving an external force and enables a valve member to tightly seal a valve opening when a revolving arm is positioned in a second lock position.SOLUTION: A gate valve includes: a body 10; a driver 20; a slide table 30; a revolving arm 40; and a valve member 50. The body 10 has a first end and a second end. The driver 20 is provided in the body 10. The slide table 30 is provided so as to slide in the body 10 and provided with a driving slide groove 31 which is arranged along a lateral direction and has a nonlinear driving locus. One end of the revolving arm 40 is connected to the driver 20, and the other end is provided in the driving slide groove 31. The driver 20 enables the revolving arm 40 to rotate along the driving locus between a first lock position and a second lock position.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a gate valve.

  Patent Document 1 describes a valve mechanism. Such a valve mechanism can selectively seal or open a valve opening provided in the case, and the valve opening has a valve seat surface. Such a valve mechanism includes at least one valve member and a drive plate. The valve member is movable in the case parallel to or perpendicular to the valve seat surface of the valve opening. The drive plate is provided in the case, is connected to the valve member, and can move horizontally within the valve, so that the valve member can move in parallel.

  However, such a valve mechanism can seal the valve opening by driving the valve member by the driving plate and displacing the valve member horizontally or vertically. Therefore, the valve member cannot be stably locked at the sealing position. As described above, the drive plate is slightly displaced or easily moved by an external cause, so that the valve opening cannot be effectively sealed by the valve member, and further, fluid can leak from the valve opening. There is sex.

US Pat. No. 7,341,237

  It is an object of the present invention to have a non-linear drive locus, the rolling member of the swivel arm makes a circumferential motion along the drive locus, and the driven slide base slides, so that the valve member opens the valve opening of the main body. When the swivel arm is in the first lock position or the second lock position, the swivel arm is offset from the direction of the movement path of the slide table, so that the slide table can be received even if it receives external force. An object of the present invention is to provide a gate valve in which the valve member can tightly seal the valve opening when the swivel arm is in the second locked position.

The gate valve of the present invention includes a main body, a driver, a slide base, a turning arm, and a valve member. The main body has a first end and a second end, and a valve opening is formed at the second end. The driver is provided on the main body. The slide base
It is provided inside the main body so as to be slidable, and a drive slide groove is provided along the lateral direction. The drive slide groove has a non-linear drive locus. One end of the swivel arm is connected to the driver, and the other end is provided in the drive slide groove. The driver performs a circumferential motion between the first lock position and the second lock position along the drive locus. This allows the slide base to slide between the first end and the second end. The valve member
It is provided on the slide base and can be displaced parallel to or perpendicular to the valve opening.
When the swing arm is located at the first lock position or the second lock position, when the swing arm that is offset from the direction of the movement path of the slide base is located at the first lock position, the slide base is When the swivel arm is located at the first end and the swivel arm is located at the second lock position, the slide base is located at the second end, and the valve member seals the valve opening.

  According to the gate valve of the present invention, the driver is rotatably provided on the main body and is operated by a manual method.

  According to the gate valve of the present invention, the driver includes a fixed portion that is fixed to the outside of the main body, a free portion that is rotatably provided on the fixed portion, and the vertical portion between the free portion and the fixed portion. The rotating shaft connected to the swivel arm and the operation rod inserted between the free portion and the rotating shaft and controlling the rotation of the rotating shaft are provided.

  According to the gate valve of the present invention, a engaging hole is provided at one end of the swivel arm, and an engaging block that engages with the engaging hole is provided at the end of the rotating shaft.

  The gate valve according to the present invention further includes a lock member, and the lock member locks the engagement hole and the engagement block along the lateral direction.

  According to the gate valve of the present invention, a rolling member is provided at the other end of the swivel arm, and the rolling member is accommodated in the drive slide groove.

According to the gate valve of the present invention, the drive trajectory includes the first drive stage, the second drive stage, and the third drive stage, and the second drive stage tilts the first drive stage and the third drive stage. The valve member is connected to the drive stage, whereby when the rolling member moves from the first drive stage to the second drive stage, the valve member is displaced perpendicularly to the valve opening to seal the valve opening. To do.

  According to the gate valve of the present invention, when the swing arm is located at the first lock position and the second lock position, the rolling member is located at the end of the third drive stage.

  According to the gate valve of the present invention, two first guide parts parallel to each other are fixed to the slide base, and the valve member has two second guide parts connected to the first guide part. Thereby, the valve member is displaced perpendicularly to the valve opening to seal the valve opening.

  According to the gate valve of the present invention, the guide pieces are provided on both sides of the main body, the guide rollers are provided on both sides of the valve member, respectively, and the guide rollers can contact the guide pieces and roll. Features.

  According to the gate valve of the present invention, the localization groove is provided at a location close to the valve openings of the two guide pieces. The valve member seals the valve opening when moved from 1 to the end portion.

  According to the gate valve of the present invention, the two first guide portions are provided with connecting grooves that are symmetrical to each other, and the second guide portion has a symmetrical groove that is symmetrical to each other and a plurality of rods. The alignment groove has an opening angle of 180 degrees with the connection groove and is aligned with the connection groove, and a plurality of rods are inserted through the connection grooves and the alignment grooves, whereby the connection grooves and The alignment groove is relatively displaceable so as to overlap.

  According to the gate valve of the present invention, the connecting groove and the mating groove have the same shape.

  According to the gate valve of the present invention, the connecting groove and the mating groove each have a first end and a second end, and an oblique step is provided between the first end and the second end. And

  According to the gate valve of the present invention, the first guide portion and the second guide portion are each composed of two first plates and two second plates provided at a distance parallel to each other. The two second plates are accommodated between the two first plates, and an interlocking plate is provided between the two second plates, so that the movement of the rod is synchronized. Features.

  According to the gate valve of the present invention, the first contact roller is provided at each of the four corners of the slide base, and the first contact roller can contact the back side surfaces of the two guide pieces and roll. And

  According to the gate valve of the present invention, the slide table is provided with a plurality of second contact rollers, and the second contact rollers can roll while contacting the back wall surface on the opposite side of the valve opening. .

  According to the gate valve of the present invention, the guide roller is provided at the edge adjacent to the drive slide groove of the slide base, and the guide roller contacts the back wall surface on the same side as the valve opening.

  According to the gate valve of the present invention, the valve member has a non-linear drive locus, the rolling member of the swivel arm makes a circumferential motion along the drive locus, and the driven slide base slides, so that the valve member is the main body. When the swivel arm is in the first lock position or the second lock position, the swivel arm is offset from the direction of the moving path of the slide base, and thus receives external force. The slide base does not sway, and the valve member has an effect that the valve opening can be tightly sealed when the swivel arm is in the second lock position.

It is a perspective view which shows the gate valve by one Embodiment of this invention. It is a figure which shows the structure inside the gate valve by one Embodiment of this invention, Comprising: The state in which a slide stand is located in the 1st end of a main body is shown. It is a figure which shows the structure inside the gate valve by one Embodiment of this invention, Comprising: The state in which a slide stand is located in the 2nd end of a main body is shown. It is a figure which shows the combined state of the driver of the gate valve by one Embodiment of this invention, and a turning arm. It is sectional drawing which shows the state by which a valve opening is sealed with the valve member of the gate valve by one Embodiment of this invention. It is a cross-sectional view which shows the gate valve by one Embodiment of this invention, Comprising: The contact state of a slide stand and a main body is shown. It is a disassembled perspective view which shows the structure of the slide stand and valve member of the gate valve by one Embodiment of this invention. It is a figure which shows the state which the connection groove | channel and the alignment groove | channel of the gate valve by one Embodiment of this invention displace relatively. It is a figure which shows the state which the connection groove | channel and the alignment groove | channel of the gate valve by one Embodiment of this invention displace relatively. It is a figure which shows the state which the connection groove | channel and the alignment groove | channel of the gate valve by one Embodiment of this invention displace relatively. It is a figure which shows the state in each position with respect to the drive slide groove | channel of the turning arm of the gate valve by one Embodiment of this invention. It is a figure which shows the state in each position with respect to the drive slide groove | channel of the turning arm of the gate valve by one Embodiment of this invention. It is a figure which shows the state in each position with respect to the drive slide groove | channel of the turning arm of the gate valve by one Embodiment of this invention.

(One embodiment)
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In order to easily understand the present invention, embodiments will be described. However, for easy understanding of the description, each type of member in the drawings of the embodiments is not drawn to scale.

  As shown in FIGS. 1 to 9C, a gate valve 100 having a locking function according to an embodiment of the present invention includes a main body 10, a driver 20, a slide base 30, a swing arm 40, and a valve member 50. Prepare. The main body 10 is hollow and has a first end 11 and a second end 12. A valve opening 13 is provided on the side of the second end 12. When the turning arm 40 is turned by the driver 20, the slide table 30 is driven and can reciprocate in the direction indicated by the arrow A in FIG. Thereby, the valve opening 13 can be sealed by the valve member 50.

  Guide pieces 14 are respectively provided on both sides of the main body 10. A localization groove 15 is provided at a location close to the valve opening 13 of the two guide pieces 14. The stereotaxic groove 15 has a refractive portion 151 and a terminal portion 152.

  The driver 20 is provided in the main body 10. As shown in FIG. 4, the driver 20 of the present embodiment is rotatably provided on the main body 10 and is operated by a manual method. Of course, the driver 20 may be operated by an air driving method. Further, the driver 20 includes a fixed portion 21, a free portion 22, a rotating shaft 23, and an operation rod 24. The fixing portion 21 is fixed to the upper surface of the main body 10. The flexible part 22 is rotatably provided on the fixed part 21. The rotary shaft 23 fitted with a bearing is provided between the free portion 22 and the fixed portion 21 along the vertical direction, and an end portion thereof is inserted into the main body 10. The operation rod 24 is inserted between the free portion 22 and the rotary shaft 23 and controls the rotation of the rotary shaft 23. The operation rod 24 is preferably screwed to the rotating shaft 23. An engaging block 231 is further provided at the end of the rotating shaft 23. Since the engaging block 231 is engaged with the turning arm 40, the driver 20 can drive the turning arm 40.

  The slide table 30 is slidably provided inside the main body 10. At one end of the slide table 30, a drive slide groove 31 is provided along the horizontal direction. The drive slide groove 31 has a non-linear drive locus 32. The drive locus 32 includes a first drive stage 321, a second drive stage 322, and a third drive stage 323. The second driving stage 322 is connected to the first driving stage 321 and the third driving stage 323 so as to be inclined. The ends of the first drive stage 321 and the third drive stage 323 have an arc shape. First contact rollers 33 are respectively provided at four corners of the slide table 30. The first contact roller 33 can roll while contacting the back side surfaces of the two guide pieces 14.

  The slide table 30 is provided with a watermark 34 in the vicinity of the drive slide groove 31. Two first guide portions 35 that are parallel to each other are fixed to the watermark portion 34. The first guide portion 35 is composed of two first plates 36 provided at a distance in parallel with each other. Each first plate 36 has two connecting grooves 37. The connecting grooves 37 of the two first plates 36 are symmetrical to each other. The connecting groove 37 has a first end 371 and a second end 372. An oblique step 373 is provided between the first end 371 and the second end 372, as shown in FIGS. 8A to 8C.

  Further, second contact rollers 38 are provided at both ends of each first guide portion 35 of the slide table 30. The second contact roller 38 can roll in contact with the back wall surface on the opposite side of the valve opening 13. The second contact roller 38 provided at one end of the first guide portion 35 is provided between the two first plates 36. The second contact roller 38 provided at the other end of the first guide portion 35 is provided outside the first plate 36.

  Further, a guide roller 39 is provided at an end edge of the slide base 30 that is close to the drive slide groove 31. The guide roller 39 contacts the back wall surface on the same side as the valve opening 13. As shown in FIG. 6, the slide table 30 can slide inside the main body 10 via the first contact roller 33, the second contact roller 38, and the guide roller 39.

  The swivel arm 40 is provided with a engaging hole 41 at one end and a rolling member 42 at the other end. The rolling member 42 is accommodated in the drive slide groove 31. The engaging hole 41 of the turning arm 40 engages with the engaging block 231 of the rotating shaft 23. The lock member 43 locks the engagement hole 41 and the engagement block 231. The swivel arm 40 is composed of two plates. The lock member 43 is provided on the two plates, and fixes the two plates. In this way, the turning arm 40 is driven by the driver 20, and the rolling member 42 can perform a circumferential motion between the first lock position and the second lock position along the drive locus 32. Thereby, the slide base 30 can slide between the first end 11 and the second end 12 of the main body 10. In particular, when the swing arm 40 is located at the first lock position or the second lock position, the swing arm 40 is offset from the direction of the moving path of the slide base 30. When the swing arm 40 is located at the first lock position and the second lock position, the rolling member 42 is located at the end of the third drive stage 323. As shown in FIGS. 9A to 9D, the arrow B indicates the offset direction of the swing arm 40.

  The valve member 50 is provided on the slide base 30 and can be displaced parallel to or perpendicular to the valve opening 13. The valve member 50 has two second guide portions 51. The second guide part 51 is connected to the first guide part 35. Thereby, the valve member 50 can be displaced perpendicularly to the valve opening 13 to seal the valve opening 13. The second guide portion 51 and the first guide portion 35 are composed of two second plates 52 that are similar in structure to each other and are provided at a certain distance in parallel. The alignment groove 53 has an opening angle of 180 degrees with the connection groove 37, and the shape thereof is the same as that of the connection groove 37, and is preferably aligned with the connection groove 37. As shown in FIGS. 8A to 8C, the alignment groove 53 includes a first end 531, a second end 532, and an oblique step 533 provided between the first end 531 and the second end 532. . Each pair of second plates 52 is positioned between each pair of first plates 36, and an interlocking plate 70 is provided therebetween. Guide rollers 54 are provided on both sides of the valve member 50, respectively. The guide roller 54 can roll in contact with the guide piece 14.

  The plurality of rods 60 can move synchronously with the connecting grooves 37 and the alignment grooves 53 being overlapped by inserting the connection grooves 37, the alignment grooves 53, and the interlocking plates 70. The rod 60 can move synchronously via the interlocking plate 70. When the rolling member 42 of the swivel arm 40 moves to the second drive stage 322 of the drive slide groove 31, the guide roller 54 enters the bending portion 151 of the localization groove 15, and the valve member 50 is connected to the first guide portion 35 and the first guide portion 35. Due to the interlocking relationship between the two guide portions 51, the valve opening 13 is displaced vertically. Further, when the rolling member 42 of the swing arm 40 moves to the third drive stage 323 of the drive slide groove 31, the guide roller 54 enters the end portion 152 of the localization groove 15, and as shown in FIG. Tightly seals the valve opening 13.

  Please refer to FIG. 8A to FIG. 8C. 8A to 8C are diagrams showing the movement path inside the connecting groove 37 and the mating groove 53 of the rod 60. FIG. As shown in FIG. 8A, the rod 60 is positioned at the first end 371 of the connecting groove 37 and the second end 532 of the mating groove 53, and this position is an overlapping area, and the rod 60 is connected to the connecting groove 37 and the mating groove 53. It is possible to avoid wobble by being restricted by the end portion having an arc shape.

  As shown in FIG. 8B, when the slide base 30 moves horizontally along the direction of the arrow A (see FIG. 2), the connecting groove 37 and the alignment groove 37 are aligned until the guide roller 54 enters the end portion 152 of the positioning groove 15. The groove 53 and the rod 60 are interlocked. This allows the valve member 50 to move vertically to the valve opening 13.

  As shown in FIG. 8C, when the rolling member 42 of the turning arm 40 moves to the third drive stage 323 (see FIG. 3), the rod 60 moves to the second end 372 of the connecting groove 37 and the first end 531 of the mating groove 53. Positioned and regulated. At this time, the valve member 50 stably seals the valve opening 13.

  Please refer to FIG. 9A to FIG. 9D. FIGS. 9A to 9D are views showing states at various positions with respect to the drive slide groove 31 of the swing arm 40. As shown in FIG. 9A, when the swing arm 40 is located at the first lock position, the rolling member 42 is located at the third drive stage 323. At this time, as shown in FIGS. 1 and 2, the slide base 30 is located at the first end 11 of the main body 10.

  As shown in FIG. 9B, the turning arm 40 is driven and moves to the end of the first drive stage 321 along the drive locus 32 of the drive slide groove 31.

  As shown in FIG. 9C, when the rolling member 42 of the swing arm 40 moves from the first drive stage 321 to the second drive stage 322, the slide base 30 comes close to the second end 12 of the main body 10, and the guide roller 54 moves. It enters the refracting portion 151 of the stereotaxic groove 15. Thereby, the valve member 50 moves vertically to the valve opening 13 to seal the valve opening 13. Further, when the guide roller 54 enters the end portion 152 of the stereotaxic groove 15, the valve member 50 tightly seals the valve opening 13.

  As shown in FIG. 9D, the swing arm 40 is positioned at the second lock position, and the rolling member 42 is positioned again at the end of the third drive stage 323. When the swivel arm 40 is located at the first lock position or the second lock position, the swivel arm 40 is offset from the direction of the movement path of the slide table 30, so that the slide table 30 can be prevented from wobbling. Thereby, when the turning arm 40 is located at the second lock position, the valve member 50 tightly seals the valve opening 13. In this way, it is possible to avoid a decrease in the sealing effect of the valve member 50 on the valve opening 13 due to the lateral force applied to the slide table 30.

Thus, while described with reference to specific examples of the present invention, those examples are for illustrative purposes only, and are not intended to limit the present invention, and have ordinary knowledge in the art. It will be appreciated that modifications, additions or deletions may be made to the embodiments disclosed herein without departing from the spirit of the invention and the scope of the claims.
The present invention can be applied to a gate valve.

DESCRIPTION OF SYMBOLS 10 Main body 11 1st end 12 2nd end 13 Valve opening 14 Guide piece 15 Positioning groove 20 Driver 21 Fixed part 22 Free part 23 Rotating shaft 24 Operation rod 30 Slide stand 31 Drive slide groove 32 Drive locus 33 1st contact roller 34 Watermark Part 35 first guide part 36 first plate 37 connecting groove 38 second contact roller 39 guide roller 40 turning arm 41 engaging hole 42 rolling member 43 locking member 50 valve member 51 second guide part 52 second plate 53 mating groove 54 guide Roller 60 Rod 70 Interlocking plate 100 Gate valve 151 Refraction part 152 End part 231 Engagement block 321 First drive stage 322 Second drive stage 323 Third drive stage 371 First end 372 Second end 373 Diagonal stage 531 First end 532 First 2-end 533 diagonal stage A arrow B arrow

It is a perspective view which shows the gate valve by one Embodiment of this invention. It is a figure which shows the structure inside the gate valve by one Embodiment of this invention, Comprising: The state in which a slide stand is located in the 1st end of a main body is shown. It is a figure which shows the structure inside the gate valve by one Embodiment of this invention, Comprising: The state in which a slide stand is located in the 2nd end of a main body is shown. It is a figure which shows the combined state of the driver of the gate valve by one Embodiment of this invention, and a turning arm. It is sectional drawing which shows the state by which a valve opening is sealed with the valve member of the gate valve by one Embodiment of this invention. It is a cross-sectional view which shows the gate valve by one Embodiment of this invention, Comprising: The contact state of a slide stand and a main body is shown. It is a disassembled perspective view which shows the structure of the slide stand and valve member of the gate valve by one Embodiment of this invention. It is a figure which shows the state which the connection groove | channel and the alignment groove | channel of the gate valve by one Embodiment of this invention displace relatively. It is a figure which shows the state which the connection groove | channel and the alignment groove | channel of the gate valve by one Embodiment of this invention displace relatively. It is a figure which shows the state which the connection groove | channel and the alignment groove | channel of the gate valve by one Embodiment of this invention displace relatively. It is a figure which shows the state in each position with respect to the drive slide groove | channel of the turning arm of the gate valve by one Embodiment of this invention. It is a figure which shows the state in each position with respect to the drive slide groove | channel of the turning arm of the gate valve by one Embodiment of this invention. It is a figure which shows the state in each position with respect to the drive slide groove | channel of the turning arm of the gate valve by one Embodiment of this invention. It is a figure which shows the state in each position with respect to the drive slide groove | channel of the turning arm of the gate valve by one Embodiment of this invention.

Claims (18)

A body having a first end and a second end, wherein a valve opening is formed at the second end;
A driver provided in the main body;
The slide body is slidably provided inside the main body, is provided with a drive slide groove along the lateral direction, and the drive slide groove has a non-linear drive locus;
One end is connected to the driver, and the other end is provided in the drive slide groove, and the driver makes a rotational movement between the first lock position and the second lock position along the drive locus. A pivot arm that is slidable between the first end and the second end;
A valve member provided on the slide base and capable of being displaced parallel to or perpendicular to the valve opening;
When the swivel arm is located at the first lock position or the second lock position, the swivel arm is offset from the direction of the moving path of the slide base,
When the swing arm is positioned at the first lock position, the slide base is positioned at the first end, and when the swing arm is positioned at the second lock position, the slide base is the first lock position. A gate valve, wherein the valve member is located at two ends and seals the valve opening.   The gate valve according to claim 1, wherein the driver is rotatably provided on the main body and can be manually operated. The driver is
A fixing portion fixed to the outside of the main body;
A free part rotatably provided on the fixed part;
A rotary shaft provided between the free portion and the fixed portion along a vertical direction, and an end portion connected to the swivel arm;
2. The gate valve according to claim 1, further comprising an operation rod that is inserted between the free portion and the rotation shaft and controls rotation of the rotation shaft.   The engagement hole is provided at one end of the swivel arm, and the engagement block that engages with the engagement hole is provided at the end of the rotating shaft. Gate valve. A lock member,
The gate valve according to claim 4, wherein the lock member locks the engagement hole and the engagement block along a lateral direction. A rolling member is provided at the other end of the swivel arm,
The gate valve according to claim 1, wherein the rolling member is accommodated in the drive slide groove. The drive locus has a first drive stage, a second drive stage, and a third drive stage,
The second driving stage is connected to the first driving stage and the third driving stage so as to be inclined, and when the rolling member moves from the first driving stage to the second driving stage,
The gate valve according to claim 6, wherein the valve member is displaced perpendicularly to the valve opening to seal the valve opening.   The rolling member according to claim 7, wherein the rolling member is located at an end of the third drive stage when the swing arm is located at the first lock position and the second lock position. Gate valve. Two first guide parts parallel to each other are fixed to the slide table,
The valve member has two second guide parts connected to the first guide part, and is displaced perpendicularly to the valve opening to seal the valve opening. The gate valve according to claim 1.   Guide pieces are provided on both sides of the main body, guide rollers are provided on both sides of the valve member, respectively, and the guide rollers are capable of rolling in contact with the guide pieces, The gate valve according to claim 9. A location groove is provided at a location close to the valve opening of the two guide pieces,
The stereotaxic groove has a refracting part and a terminal part, and the valve member seals the valve opening when the guide roller moves from the refracting part to the terminal part. Item 10. The gate valve according to Item 10. The two first guide portions are provided with symmetrical connecting grooves, respectively, and the second guide portion is provided with symmetrical grooves and a plurality of rods.
The alignment groove has an opening angle of 180 degrees with the connection groove, and is aligned with the connection groove, and the plurality of rods pass through the connection grooves and the alignment grooves, and the connection grooves and the The gate valve according to claim 9, wherein the gate valve is relatively displaceable so that the alignment grooves overlap each other.   The gate valve according to claim 12, wherein the connecting groove and the mating groove have the same shape. The connecting groove has a first end and a second end, and an oblique step is provided between the first end of the connecting groove and the second end of the connecting groove;
The alignment groove has a first end and a second end, and an oblique step is provided between the first end of the alignment groove and the second end of the alignment groove. 14. The gate valve according to 13.   The first guide portion and the second guide portion are respectively two first plates that are parallel to each other and provided at a predetermined distance, and two first plates that are parallel to each other and provided at a predetermined distance. Two second plates, the two second plates are positioned and accommodated between the two first plates, and an interlocking plate is provided between the two second plates, The gate valve according to claim 12, wherein the movement of the rod is synchronized. First contact rollers are respectively provided at the four corners of the slide table,
11. The gate valve according to claim 10, wherein the first contact roller is capable of rolling while contacting the back side surfaces of the two guide pieces. The slide table is provided with a plurality of second contact rollers,
2. The gate valve according to claim 1, wherein the second contact roller is capable of rolling in contact with a back wall surface on the opposite side of the valve opening. A guide roller is provided at an edge of the slide table adjacent to the drive slide groove,
The gate valve according to claim 1, wherein the guide roller is in contact with a back wall surface located on the same side as the valve opening.

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