JP2011000925A - Platform door device and installation method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily adjust an installation position of a guide body of a platform door device.SOLUTION: This platform door device has a base board part 27 placed on a predetermined placing surface of a platform and fixed to the platform, a base board side bolt hole formed in the base board part 27, a first long hole 21a of a cross-sectional shape long in the orthogonal direction to the moving direction of a door part, a first bolt hole formed in a first support plate part 21, a second long hole 22a of a cross-sectional shape long in the orthogonal direction to the first long hole 21a, a first bolt 52 inserted into the first long hole 21a and the base board side bolt hole and fastening the base board part 27 and the first support plate part 21, and a second bolt hole 54 inserted into the second long hole 22a and the first bolt hole and fastening the first support plate part 21 and the second support plate part 22.

Description

  The present invention relates to a platform door device and an installation method thereof.

  Conventionally, as disclosed in Patent Document 1 below, a platform door device that is installed at an edge of a platform and opens and closes an entrance / exit is known. The platform door device disclosed in Patent Document 1 includes fixing brackets that are independently provided on the line side and the non-track side of the guide body (door bag), and these fixing brackets are formed in the platform. The platform door device is fixed to the platform by being inserted through the mounting holes and fixed. The fixing bracket is a bolt-shaped bracket, and the mounting hole is configured as a mounting hole through which the fixing bracket can be inserted. When installing this platform door device, it is only necessary to carry out the lifting work for the mounting holes, so that the hanging work can be greatly reduced and the working time for installation can be shortened.

JP-A-2005-306229

  The platform door device of Patent Document 1 has an advantage that the suspension work can be greatly reduced because a mounting hole into which the fixing bracket can be inserted is formed in the platform. On the other hand, since the position of the guide body is determined by the position of the mounting hole, in order to accurately position the guide body, the mounting hole must be accurately drilled. On the other hand, since the upper surface of the platform is composed of mortar, tiles, etc., the upper surface of the platform may not be exactly horizontal, so even if the mounting holes are accurately formed, when installing the guide body A situation may occur in which the positions of adjacent guide bodies are not accurately aligned.

  Therefore, the present invention has been made in view of such a point, and an object of the present invention is to facilitate adjustment of the installation position of the guide body of the platform door device.

  In order to achieve the above-described object, the present invention provides a platform door device including a door portion that can open and close the entrance and a guide body that supports the door portion so as to be movable forward and backward. It is a platform door apparatus provided with the board | substrate part fixed to this mounting surface, and the adjustment means which can adjust the position of the said guide body with respect to the said board | substrate part.

  In the present invention, since the position of the guide body can be adjusted by the adjusting means with respect to the substrate portion fixed to the predetermined mounting surface of the platform, even if the substrate portion is not accurately positioned on the platform. The guide body can be set at an accurate position. In addition, since the position of the guide body can be adjusted with respect to the substrate portion in a state where the substrate portion is fixed to the platform, even if the platform mounting surface is not formed on an accurate horizontal plane, The guide body can be installed while finely adjusting the position. Therefore, it is possible to easily adjust the installation position of the guide body.

  Here, the guide body includes a first support plate portion superposed on the upper surface of the substrate portion, a second support plate portion placed on the upper surface of the first support plate portion, and the second support plate portion. A guide body main body supported by the board, and the adjusting means is formed on the board-side bolt hole formed in the board portion and the first support plate portion, and the moving direction of the door portion or the same. A first long hole having a long cross-sectional shape in a direction perpendicular to the first direction, a first bolt hole formed in the first support plate portion, and a direction formed perpendicular to the first long hole in the second support plate portion. A second long hole having a long cross-sectional shape, a first bolt inserted through the first long hole and the board-side bolt hole to fasten the substrate part and the first support plate part, and the second long hole A second bolt that is inserted through the hole and the first bolt hole and fastens the first support plate and the second support plate. Preference is.

  In this aspect, the position of the 1st support plate part with respect to a board | substrate part can be changed by changing the position of a 1st volt | bolt in the 1st long hole to the moving direction of a door part, or the direction orthogonal to this. Further, the position of the second support plate portion (guide body main body) relative to the first support plate portion is changed by changing the position of the second bolt in the second long hole in a direction orthogonal to the longitudinal direction of the cross section of the first long hole. Can be changed. Therefore, the position of the guide body main body can be adjusted in the horizontal plane.

  In this aspect, the adjusting means may include a height adjusting bolt for adjusting the height of the second support plate portion with respect to the first support plate portion.

  In this aspect, the height of the second support plate portion (guide body main body) can be continuously changed by the height adjusting bolt. Therefore, the position of the guide body main body can be adjusted to an arbitrary height in the vertical direction.

  The adjusting means may have a shim having a predetermined thickness interposed between the first support plate portion and the second support plate portion.

  In this aspect, the height of the second support plate portion (guide body main body) can be changed by changing the thickness of the shim sandwiched between the first support plate portion and the second support plate portion. Therefore, it is possible to adjust the position of the guide body main body in the vertical direction.

  The present invention is the installation method of the platform door device, wherein the substrate portion is placed and fixed on a predetermined placement surface of the platform, the position of the guide body is adjusted with respect to the substrate portion, and the guide It is the installation method of the platform door apparatus which fixes a body with respect to the said board | substrate part.

  The present invention is a method for installing the platform door device, wherein the board portion is placed and fixed on a predetermined placement surface of the platform, and the first bolt is inserted into the first long hole and the board side bolt hole. The position of the first support plate portion with respect to the substrate portion is adjusted in the state, and the position of the second support plate portion with respect to the first support plate portion in a state where the second bolt is inserted into the second elongated hole and the first bolt hole. The platform portion and the first support plate portion are fastened to each other with the first bolt, and the second support plate portion is fastened to the first support plate portion with the second bolt. It is an installation method.

  In the installation method of the platform door device, the height of the second support plate portion relative to the first support plate portion may be adjusted with a height adjusting bolt.

  In the installation method of the platform door device, a shim having a predetermined thickness is selected so that the height position of the guide body main body is a predetermined position, and the gap between the first support plate portion and the second support plate portion is selected. You may make it interpose.

  Further, in the method for installing the platform door device, the height position of a predetermined placement surface of the platform on which the guide body is installed is measured in advance, and the first body is set at a predetermined height. The thickness of at least one of the support plate portion and the second support plate portion is adjusted, and the first support plate portion is superposed on the upper surface of the substrate portion, and the second support plate portion is provided on the upper surface of the first support plate portion. The first support plate portion and the second support plate portion may be fixed to the substrate portion by polymerization.

  As described above, according to the present invention, it is possible to easily adjust the installation position of the guide body of the platform door device.

It is a front view of a platform door device concerning an embodiment of the present invention. It is a figure which shows the guide box, door part, and support box of the right side of FIG. 1 in the state installed in the platform. It is sectional drawing which looked at the guide box and door part of the right side of FIG. 1 of the state installed in the platform from the door bottom side. It is a figure which expands and shows the lower part of FIG. 2 partially. It is a figure which expands and shows the lower part of FIG. 3 partially. It is a figure for demonstrating the adjustment means of the platform door apparatus of FIG. It is a figure for demonstrating the adjustment means of the platform door apparatus which concerns on other embodiment of this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a front view of a platform door device 10 according to an embodiment of the present invention as viewed from the platform side toward the track side. As shown in the figure, the platform door device 10 is movable to a pair of guide boxes 12, 12 arranged at predetermined intervals along the track side edge of the platform P, and to each guide box 12, 12. A pair of sliding door-type doors 14 and 14 that are supported in such a state. The guide box 12 is included in the concept of the guide body in the present invention.

  When a large number of the platform door devices 10 are arranged along the edge of the platform P with a fixed partition wall or the like interposed therebetween, the platform P is partitioned into the track side and the inside (home inside). . When the door portions 14 are in the closed position as shown in FIG. 1, the entrance / exit 20 between the guide boxes 12 is closed, while the entrance / exit 20 is opened by retracting the door portion 14 to the open position. The

  Each guide box 12 is configured to be installable on the platform P, and the door portion 14 can penetrate in a direction along the track (left and right direction in FIG. 1). In addition, although the platform door apparatus 10 of this embodiment is comprised as what is called a double-drawing type movable fence, it is not restricted to this, For example, it is supported by one guide box 12 and this guide box 12 It may be configured as a one-way movable fence having one door portion 14.

  Here, specific configurations of the guide box 12 and the door portion 14 will be described with reference to FIGS. 2 to 5. The left guide box 12 and the door part 14 in FIG. 1 are symmetrically configured with the right guide box 12 and the door part 14, so here, the right guide box 12 and the door part 14 in FIG. 1 are configured. Only will be described.

  The guide box 12 includes a first support plate portion 21, a second support plate portion 22 placed on the upper surface of the first support plate portion 21, and a guide body main body 23 supported by the second support plate portion 22. And having.

  The first support plate portion 21 is formed in a rectangular flat plate shape and is superposed on the upper surface of the substrate portion 27 placed on a predetermined placement surface 25 of the platform P for installing the guide box 12. The board portion 27 is fixed to the PC board 29 together with a lower board 31 arranged so as to be superposed on the lower surface of a PC board (prestressed concrete board) 29 provided on the platform P. Specifically, bolt insertion holes are formed in the substrate portion 27 and the lower plate 31, and through holes that penetrate vertically are formed in the PC plate 29. The nuts 34 are screwed into the bolts 33 inserted into the bolt insertion holes of the board portion 27, the through holes of the PC plate 29, and the through holes of the lower side plate 31. The board portion 27 is fixed to the platform P so as to sandwich 29. The substrate part 27 and the lower plate 31 also function as washers. As shown in FIG. 3, the PC plate 29 is horizontally disposed so as to protrude from the main body P1 of the platform P to the track side, and the PC plate 29 is arranged along the track so that the platform P A track side edge is formed. The lower side of the PC board 29 is a space.

  The second support plate portion 22 is formed in a rectangular flat plate shape slightly smaller than the first support plate portion 21, and is superimposed on the first support plate portion 21. The guide body 23 includes a base portion 37 disposed on the second support plate portion 22, and a box portion 39 disposed on the base portion 37 with an insulating plate 38 interposed therebetween. Have.

  The insulating plate 38 is a plate material made of an insulating material, and is disposed at intervals in the track direction. By forming a gap between the insulating plates 38, it also functions as a drain.

  The base part 37 may be formed, for example, in a rectangular flat plate shape, or may be configured by assembling a plate material or a bar material in a frame shape. In this embodiment, the base part 37 is configured by assembling plate materials in a frame shape. The base part 37 is fixed to the upper surface of the second support plate part 22 by welding. After the guide box 12 is installed, the mortar M is laid to the intermediate height of the base portion 37, and the upper surface thereof becomes the upper surface P2 of the platform P. Accordingly, the substrate portion 27, the first support plate portion 21, and the second support plate portion 22 are embedded in the mortar M.

  The box unit 39 includes a casing 42 and a drive mechanism (not shown) disposed in the casing 42. The drive mechanism is for opening and closing the door portion 14, and a known mechanism is adopted. In this embodiment, for example, a belt drive mechanism is employed, but the drive mechanism may be a system that drives the door portion 14 using a rack and pinion.

  The casing 42 has a bottom plate portion 42 a. The bottom plate portion 42 a is placed on the insulating plate 38 and fastened to the insulating plate 38 and the base portion 37. In addition to the bottom plate portion 42a, the casing 42 has a pair of end walls 42b and 42b arranged at intervals in the width direction (door opening / closing direction), and the thickness direction (direction orthogonal to the door opening / closing direction). A pair of side walls 42c, 42c, and a top portion 42d that connects the end walls 42b, 42b and the upper ends of the side walls 42c, 42c, and has a rectangular shape in plan view. It is formed in a shape. It should be noted that auxiliary sensors 44 for detecting passers-by of the entrance / exit 20 are provided at two upper and lower portions on the side walls 42c, 42c on the track side.

  Openings through which the door portion 14 is inserted are respectively formed in the end walls 42 b and 42 b, and the door portion 14 penetrates the guide box 12. As shown in FIG. 2, the door portion 14 has a frame body portion 14a formed of a plurality of frame materials, and has a configuration in which a transparent panel 14b and a metal panel 14c are fitted inside.

  A drive mechanism is disposed in the guide box 12 as described above. The drive mechanism is controlled by a control signal sent from the outside of the guide box 12. For this reason, signal lines and power supply lines (not shown) are drawn into the guide box 12, but these signal lines and the like are routed below the PC board 29. The lower plate 31 is provided with a storage portion 46 that can store these signal lines and the like. The signal lines and the like pass through the lower plate 31, the PC plate 29, the substrate portion 27, the first support plate portion 21, the second support plate portion 22, the base portion 37, and the bottom plate portion 42 a in the guide box 12. Has been drawn into.

  Here, the position adjustment of the guide box 12 will be described.

  The home door apparatus 10 includes an adjusting unit 50 that can adjust the position of the guide box 12 with respect to the board portion 27. As shown in FIGS. 4 to 6, the adjusting means 50 includes the board side bolt hole 27a, the first long hole 21a, the first bolt hole 21b, the second long hole 22a, the first bolt 52, the second bolt 54, and the height. It has a bolt 56 for adjusting the height.

  The board-side bolt hole 27a, the first elongated hole 21a, and the first bolt 52 can adjust the position of the guide box 12 in the horizontal direction in the direction orthogonal to the moving direction of the door portion 14 (the direction along the track). Yes. Specifically, the board-side bolt hole 27 a is a through-hole formed in the board portion 27 and has a size corresponding to the diameter of the screw portion of the first bolt 52. The first long hole 21 a is a through hole formed in the first support plate portion 21, and has a long cross-sectional shape in a direction orthogonal to the moving direction of the door portion 14. The first bolt 52 is inserted through the board-side bolt hole 27a and the first long hole 21a with a washer 58 interposed. For this reason, the position of the 1st volt | bolt 52 can be changed in the direction orthogonal to the moving direction of the door part 14 in the 1st long hole 21a. Then, the nut 59 is screwed to the first bolt 52 in a state where the guide box 12 is in a desired position in a direction orthogonal to the moving direction of the door portion 14, thereby the first support plate with respect to the substrate portion 27. The part 21 can be fastened. As shown in FIG. 5, a bolt groove 29 a is formed on the upper surface of the PC plate 29 so that the head of the first bolt 52 does not interfere. The bolt groove 29a has such a size that the head does not interfere even if the position of the first bolt 52 moves.

  With the first bolt hole 21b, the second elongated hole 22a, and the second bolt 54, the position of the guide box 12 in the horizontal direction in the moving direction of the door portion 14 can be adjusted. Specifically, the first bolt hole 21 b is a bolt fastening hole formed in the first support plate portion 21, and a female screw corresponding to the screw portion of the second bolt 54 is formed. On the other hand, the second long hole 22 a is a through-hole formed in the second support plate part 22 and has a long cross-sectional shape in the moving direction of the door part 14. The second bolt 54 is inserted through the second long hole 22a from above through the washer 61 and screwed into the first bolt hole 21b. For this reason, the position of the 2nd volt | bolt 54 screwed together by the 1st volt | bolt hole 21b can be changed to the moving direction of the door part 14 in the 2nd long hole 22a. The first support plate portion 21 and the second support plate portion 22 are fastened to each other with the guide box 12 at a desired position in the moving direction of the door portion 14.

  The board-side bolt hole 27a may be constituted by a bolt fastening hole, and the first bolt 52 may be inserted into the first support plate portion 21 from above and screwed into the board-side bolt hole 27a. Alternatively, the first bolt hole 21b may be configured by a through hole in which a female screw is not formed, and a nut may be screwed into the second bolt 54. In this case, it is necessary to form a bolt groove on the upper surface of the PC plate 29 to prevent interference between the nut or bolt heads.

  The height adjusting bolt 56 is screwed into a bolt fastening hole formed through the second support plate portion 22. When the height adjusting bolt 56 is screwed in from above, the lower end portion of the bolt 56 presses the first support plate portion 21, and accordingly, the second support plate portion 22 floats away from the first support plate portion 21. . Thereby, the height of the guide box 12 can be finely adjusted.

  Next, the installation method of the platform door apparatus 10 is demonstrated. First, the substrate portion 27 is placed on the upper surface of the PC plate 29 formed as the placement surface 25 on which the guide box 12 is placed, and the lower plate 31 is disposed on the lower surface of the PC plate 29. The substrate part 27 and the lower plate 31 are fastened with bolts 33 in a state where the is sandwiched. Thereby, the board | substrate part 27 is fixed to the mounting surface 25 of a platform.

  Subsequently, the first support plate portion 21 is placed on the substrate portion 27, and the second support plate portion 22 to which the guide body main body 23 is fixed is placed thereon. Then, the first bolt 52 is inserted through the board-side bolt hole 27 a of the board part 27 and the first long hole 21 a of the first support plate part 21, and the nut 59 is screwed. At this time, the first support plate portion 21 is movable in a direction orthogonal to the moving direction of the door portion 14 because of temporary fixing. Further, the second bolt 54 is inserted into the second long hole 22 a of the second support plate portion 22, and the second bolt 54 is screwed into the first bolt hole 21 b of the first support plate portion 21. At this time, the second support plate portion 22 is movable in the moving direction of the door portion 14 with respect to the first support plate portion 21 due to temporary fixing.

  In this state, the first support plate 21 is shifted in the direction orthogonal to the moving direction of the door portion 14 and the second supporting plate portion 22 is shifted in the moving direction of the door portion 14, so that the guide body main body 23 is moved to a desired horizontal direction. The position of the second support plate portion 22 (guide body main body 23) with respect to the substrate portion 27 is adjusted so as to be in the position. At this time, the guide body main body 23 can be shifted to an arbitrary position in the horizontal direction within the range of the long holes 21a and 22a. Then, the first support plate portion 21 is fixed by screwing the nut 59 strongly to the first bolt 52 so that the first support plate portion 21 does not shift with respect to the substrate portion 27.

  Subsequently, the height adjusting bolt 56 is screwed into the bolt fastening hole, and the height of the second support plate portion 22 with respect to the first support plate portion 21 is set so that the height of the guide body main body 23 becomes a desired height. The height is adjusted, and finally the second bolt 54 is screwed to fasten the first support plate portion 21 and the second support plate portion 22 to each other. Thereby, the guide box 12 is fixed to the board | substrate part 27 (platform P) in the state in which the guide body main body 23 was adjusted to the horizontal direction and the up-down direction.

  As described above, in the present embodiment, the adjusting unit 50 can adjust the position of the guide box 12 with respect to the substrate unit 27 fixed to the predetermined placement surface 25 of the platform P. Even when 27 is not accurately positioned on the platform P, the guide box 12 can be set at an accurate position. Further, since the position of the guide box 12 can be adjusted with respect to the substrate portion 27 in a state where the substrate portion 27 is fixed to the platform P, the placement surface 25 of the platform P is not formed on an accurate horizontal plane. Even in this case, the guide box can be installed while finely adjusting the position of the guide box 12. Therefore, the installation position of the guide box 12 can be easily adjusted.

  Further, in the present embodiment, the position of the first support plate portion 21 relative to the substrate portion 27 can be changed by changing the position of the first bolt 52 in the first long hole 21 a in the moving direction of the door portion 14. Further, by changing the position of the second bolt 54 in the second long hole 22a to a direction orthogonal to the moving direction of the door portion, the second support plate portion 22 (guide body main body 23) of the first support plate portion 21 is changed. The position can be changed. Therefore, it is possible to adjust the position of the guide body main body 23 in the horizontal plane.

  Furthermore, in the present embodiment, the height of the second support plate portion 22 (guide body main body 23) can be continuously changed by the height adjusting bolt 56. Therefore, the height position of the guide body main body 23 can be adjusted to an arbitrary height in the vertical direction.

  Note that the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made without departing from the spirit of the present invention. For example, in the said embodiment, the 1st long hole 21a has a long cross-sectional shape in the direction orthogonal to the moving direction of the door part 14, and the 2nd long hole 22a has a long cross-sectional shape in the moving direction of the door part 14. However, the present invention is not limited to this, and the first long hole 21a has a long cross-sectional shape in the moving direction of the door portion 14, and the second long hole 22a is long in the direction orthogonal to the moving direction of the door portion 14. It is good also as a structure which has a cross-sectional shape.

  In the embodiment, the height of the second support plate portion 22 can be changed by the height adjusting bolt 56, but instead of this, as shown in FIG. It is good also as a structure which has the shim 65 interposed between 21 and the 2nd support plate part 22. FIG. The shims 65 are inserted by appropriately selecting the thickness and the number of sheets so that the guide body main body 23 is at a desired height position. Moreover, it is good also as a structure which can change the height of the 2nd support plate part 22 with both the bolt 56 for height adjustment, and the shim 65. FIG.

  In the above embodiment, the height position of the guide body main body 23 is adjusted when the guide box 12 is installed. Instead, the height of the mounting surface 25 on which the guide box 12 is installed is measured in advance. In addition, the guide box 12 in which the thickness of at least one of the first support plate portion 21 and the second support plate portion 22 is adjusted according to the measurement result may be installed. Further, instead of or together with this, a guide box 12 in which the height of the base portion 37 is adjusted may be installed.

DESCRIPTION OF SYMBOLS 12 Guide box 14 Door part 20 Entrance / exit 21 21 1st support plate part 21a 1st long hole 21b 1st bolt hole 22 2nd support plate part 22a 2nd long hole 23 Guide body main body 25 Mounting surface 27 Substrate part 27a Substrate side Bolt hole 50 Adjusting means 52 First bolt 54 Second bolt 56 Height adjusting bolt 65 Shim

Claims (9)

It is a home door device comprising a door part that can open and close the entrance and exit, and a guide body that supports the door part so as to move forward and backward,
A substrate portion fixed to a predetermined mounting surface of the platform;
A platform door device comprising: adjusting means capable of adjusting a position of the guide body with respect to the substrate portion. The guide body is supported by the first support plate portion superposed on the upper surface of the substrate portion, the second support plate portion placed on the upper surface of the first support plate portion, and the second support plate portion. A guide body main body,
The adjusting means includes
A board-side bolt hole formed in the board part;
A first elongated hole having a cross-sectional shape that is formed in the first support plate portion and is long in the direction of movement of the door portion or in a direction orthogonal thereto;
A first bolt hole formed in the first support plate portion;
A second elongated hole having a cross-sectional shape formed in the second support plate portion and extending in a direction orthogonal to the first elongated hole;
A first bolt inserted through the first elongated hole and the board side bolt hole to fasten the board part and the first support plate part;
2. The platform door device according to claim 1, further comprising: a second bolt that is inserted through the second elongated hole and the first bolt hole to fasten the first support plate portion and the second support plate portion.   The platform door device according to claim 2, wherein the adjusting means includes a height adjusting bolt for adjusting a height of the second support plate portion with respect to the first support plate portion.   The platform door device according to claim 2, wherein the adjusting means includes a shim having a predetermined thickness interposed between the first support plate portion and the second support plate portion. It is the installation method of the platform door apparatus of Claim 1, Comprising:
Place and fix the board part on a predetermined placement surface of the platform,
An installation method of a home door device for adjusting the position of a guide body with respect to the substrate portion and fixing the guide body to the substrate portion. It is the installation method of the platform door apparatus of Claim 2, Comprising:
Place and fix the board part on a predetermined placement surface of the platform,
Adjusting the position of the first support plate part with respect to the substrate part in a state where the first bolt is inserted into the first elongated hole and the board side bolt hole,
Adjusting the position of the second support plate portion relative to the first support plate portion with the second bolt inserted through the second elongated hole and the first bolt hole;
The substrate portion and the first support plate portion are fastened together with the first bolt,
The installation method of the platform door apparatus which fastens the said 2nd support plate part to the said 1st support plate part with the said 2nd volt | bolt. It is the installation method of the platform door apparatus of Claim 6, Comprising:
The installation method of the platform door apparatus which adjusts the height of the said 2nd support plate part with respect to a said 1st support plate part with the bolt for height adjustment. It is the installation method of the platform door apparatus of Claim 6, Comprising:
A method for installing a home door device, wherein a shim having a predetermined thickness is selected so that the height position of the guide body main body is a predetermined position, and is interposed between the first support plate portion and the second support plate portion. It is the installation method of the platform door apparatus of Claim 6, Comprising:
The height position of a predetermined mounting surface of the platform on which the guide body is installed is measured in advance,
The thickness of at least one of the first support plate portion and the second support plate portion is adjusted so that the guide body has a predetermined height, and the first support plate portion is superposed on the upper surface of the substrate portion. A method for installing a home door device, wherein a second support plate portion is superposed on an upper surface of the first support plate portion, and the first support plate portion and the second support plate portion are fixed to the substrate portion.

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