阅读说明：本技术 一种太阳能发电板安装结构及其安装方法 (Solar power generation panel mounting structure and mounting method thereof ) 是由 张�浩 陈生明 王凯 于 2020-12-04 设计创作，主要内容包括：本发明公开了一种太阳能发电板安装结构及其安装方法,包括安装板,安装板设置有两个,且两个安装板的相对面中部共同固定安装有连接板,安装板下端左部和下端右部均固定安装有支撑脚,安装板上端设置有活动机构,连接板后部设置有调节机构,调节机构与活动机构上端共同活动安装有固定框,固定框上端四角均固定安装有紧固件,固定框上端固定安装有发电组件,连接板右端面与位于后方的安装板前端面之间共同固定安装有限位组件。本发明还公开了一种太阳能发电板安装结构的安装方法,能够有效提高安装效率,在保证安装稳固的同时,还能够便于进行拆卸维护,同时还能够便于调节太阳能电池板的倾斜角度,适宜推广。(The invention discloses a solar power generation panel mounting structure and a mounting method thereof, wherein the solar power generation panel mounting structure comprises two mounting panels, a connecting plate is jointly and fixedly mounted in the middle of opposite surfaces of the two mounting panels, supporting legs are fixedly mounted on the left part and the right part of the lower end of each mounting panel, a movable mechanism is arranged at the upper end of each mounting panel, an adjusting mechanism is arranged at the rear part of each connecting plate, a fixed frame is jointly and movably mounted on the upper ends of the adjusting mechanism and the movable mechanism, fasteners are fixedly mounted on four corners of the upper end of the fixed frame, a power generation assembly is fixedly mounted on the upper end of the fixed frame, and. The invention also discloses an installation method of the solar panel installation structure, which can effectively improve the installation efficiency, ensure the installation stability, facilitate the disassembly and maintenance, facilitate the adjustment of the inclination angle of the solar panel and is suitable for popularization.)

1. The utility model provides a solar panel mounting structure, includes mounting panel (1), its characterized in that:

the two mounting plates (1) are arranged, the middle parts of opposite surfaces of the two mounting plates (1) are fixedly provided with the connecting plate (2) together, and the connecting plate (2) and the two mounting plates (1) are of an integrally formed structure;

supporting legs (3) are fixedly arranged on the left portion of the lower end and the right portion of the lower end of each of the two mounting plates (1), mounting seats (10) are fixedly arranged on the lower ends of the supporting legs (3), mounting holes (11) which penetrate through the mounting seats from top to bottom are formed in the periphery of the upper end face of each mounting seat (10), and a movable mechanism (5) is arranged at the upper end of the mounting plate (1) located in front of each mounting seat;

the rear part of the connecting plate (2) is provided with an adjusting mechanism (4), the upper ends of the adjusting mechanism (4) and the movable mechanism (5) are movably provided with a fixed frame (6) together, four corners of the upper end of the fixed frame (6) are fixedly provided with fasteners (7), and the upper end of the fixed frame (6) is fixedly provided with a power generation assembly (8);

and a limiting component (9) is fixedly mounted between the right end face of the connecting plate (2) and the front end face of the mounting plate (1) positioned at the rear part together.

2. A solar power generation panel mounting structure according to claim 1, wherein: activity mechanism (5) are including vertical board (51), vertical board (51) are provided with two, and rotate through the bearing between two vertical boards (51) and be connected with pivot (52), the equal fixed mounting in pivot (52) surface left part and surface right part has axle sleeve (53), two the equal fixedly connected with connecting block (54) in axle sleeve (53) upper end, two vertical board (51) fixed mounting is in mounting panel (1) upper end that is located the place ahead, and the equal fixed connection of two connecting blocks (54) is in fixed frame (6) lower extreme front portion.

3. A solar power generation panel mounting structure according to claim 1, wherein: the adjusting mechanism (4) comprises a screw rod (41) and a fixing plate (46);

the screw rod (41) is in threaded connection with the rear part of the upper end of the connecting plate (2), and the lower end of the screw rod (41) penetrates through the connecting plate (2) and extends to the lower part of the connecting plate;

a plurality of connecting rods (42) are fixedly connected to the part of the outer surface of the screw rod (41) below the connecting plate (2) in an annular array manner, and one ends of the connecting rods (42) far away from the screw rod (41) are fixedly connected with a rotating ring (43) together;

the upper end of the screw rod (41) is fixedly connected with a stabilizing plate (44) through a bearing in a rotating mode, the middle of the upper end of the stabilizing plate (44) is fixedly provided with a fixing block (45), two fixing plates (46) are arranged and are respectively and fixedly arranged on the left portion and the right portion of the lower end of the fixing frame (6), and a central shaft (47) is fixedly connected between the two fixing plates (46) together;

the fixed block (45) is rotatably connected to the middle of the outer surface of the central shaft (47) through a bearing.

4. A solar power generation panel mounting structure according to claim 3, wherein: spacing subassembly (9) include stopper (91), stopper (91) fixed mounting is between the mounting panel (1) preceding terminal surface at connecting plate (2) right-hand member face and be located the rear, and stopper (91) upper end sets up sliding opening (92) of upper and lower break-over, it has gag lever post (94) to alternate sliding connection in sliding opening (92), gag lever post (94) upper end fixed mounting has limiting plate (93), and its limiting plate (93) are located stopper (91) top.

5. A solar power generation panel mounting structure according to claim 4, wherein: the lower end of the limiting rod (94) penetrates through the sliding hole (92) and a gap between two adjacent connecting rods (42) and extends to the lower part of the rotating ring (43).

6. A solar power generation panel mounting structure according to claim 1, wherein: the fastener (7) comprises a vertical rod (71);

the vertical rod (71) is fixedly installed at the upper end of the fixed frame (6), a top plate (72) is fixedly installed at the upper end of the vertical rod (71), a first extension plate (74) is fixedly connected to one side, close to the power generation assembly (8), of the top plate (72), a sleeve (73) is installed in the middle of the outer surface of the vertical rod (71) in a sliding mode, and a second extension plate (78) is fixedly installed on the outer surface of the sleeve (73);

the middle part of the upper end of the first extension plate (74) is in threaded connection with a threaded column (77), the lower end of the threaded column (77) penetrates through the first extension plate (74), extends to the lower part of the first extension plate and is rotatably connected to the middle part of the upper end of the second extension plate (78) through a bearing, and the upper end of the threaded column (77) is fixedly provided with a knob (75);

a spiral spring (76) is sleeved on the outer surface of the vertical rod (71) and located between the top plate (72) and the sleeve (73), and two ends of the spiral spring (76) are fixedly connected with the top plate (72) and the sleeve (73) respectively.

7. A solar power generation panel mounting structure according to claim 6, wherein: the power generation assembly (8) comprises a base plate (81), a solar cell panel (82) is laid in the middle of the upper end of the base plate (81), and limiting grooves (83) are formed in four corners of the upper end of the base plate (81).

8. A solar power generation panel mounting structure according to claim 7, wherein: the sleeve (73) and the second extension plate (78) are of an integrated structure, and the four limiting grooves (83) are respectively located under the four sleeve (73) and the second extension plate (78).

9. A solar power generation panel mounting structure according to claim 7, wherein: the fixed frame (6) upper end middle part is seted up square groove (13) of break-over from top to bottom, the fixed position fixed mounting that fixed frame (6) upper end is located square groove (13) outside has annular support plate (12), annular support plate (12) upper end is hugged closely to base plate (81) lower extreme.

10. A method of mounting a solar panel mounting structure according to any one of claims 8 to 9, comprising the steps of:

a: the whole mounting structure is fixedly mounted on a plane to be mounted by an expansion bolt through a mounting seat (10) and a mounting hole (11), and connection and fastening are ensured;

b: the four knobs (75) are sequentially rotated to enable the four sleeves (73) to drive the four second extension plates (78) to move upwards, the power generation assembly (8) is placed on the upper end face of the fixed frame (6), the four limiting grooves (83) are located right below the four sleeves (73) and the second extension plates (78), and the four sleeves (73) and the second extension plates (78) are embedded into the limiting grooves (83) below the four sleeves and the second extension plates (78) to fix the power generation assembly (8) by reversely rotating the knobs (75);

c: the limiting rod (94) is pulled out of the slide hole (92), the height of the screw rod (41) is controlled by adjusting the rotary ring (43), the purpose of controlling the inclination angle of the power generation assembly (8) is achieved, and after the rotating angle is adjusted to a proper angle, the limiting rod (94) is inserted into the slide hole (92).

Technical Field

The invention relates to the technical field of solar power generation, in particular to a solar power generation panel mounting structure and a solar power generation panel mounting method.

Background

Photovoltaic power generation is a technology of directly converting light energy into electric energy by using the photovoltaic effect of a semiconductor interface. The solar energy power generation system mainly comprises a solar panel (assembly), a controller and an inverter, and the main components are electronic components. The solar cells are connected in series and then are packaged and protected to form a large-area solar cell module, and then the photovoltaic power generation device is formed by matching with components such as a power controller and the like.

However, in the prior art, a solar panel for photovoltaic power generation is generally fixed on a frame by using screws, because the solar panel is basically exposed externally, if the time is long, the screws for fixing the solar panel are easy to rust, the operation is difficult when the solar panel is replaced in the later period, and a general solar panel support frame generally does not have the function of adjusting the angle, and the solar panel generally needs to be finely adjusted after being installed, so that the solar panel can better face the sun and receive more light energy.

Disclosure of Invention

The invention mainly aims to provide a solar power generation panel mounting structure and a solar power generation panel mounting method, which can effectively solve the problems in the background art.

In order to achieve the purpose, the invention adopts the technical scheme that:

a solar power generation panel mounting structure comprises two mounting panels, wherein the middle parts of the opposite surfaces of the two mounting panels are fixedly provided with a connecting plate together, the connecting plate and the two mounting plates are of an integrated structure, supporting legs are fixedly arranged on the left part and the right part of the lower ends of the two mounting plates, and the lower ends of the supporting legs are fixedly provided with mounting seats, the periphery of the upper end surface of each mounting seat is provided with mounting holes which are penetrated up and down, the upper end of the mounting plate positioned in front of the mounting seat is provided with a movable mechanism, the rear part of the connecting plate is provided with an adjusting mechanism, the adjusting mechanism and the upper end of the movable mechanism are jointly and movably provided with a fixed frame, the four corners of the upper end of the fixing frame are fixedly provided with fasteners, the upper end of the fixing frame is fixedly provided with a power generation assembly, and a limiting assembly is fixedly arranged between the right end face of the connecting plate and the front end face of the mounting plate positioned at the rear part together.

Preferably, the moving mechanism includes vertical board, vertical board is provided with two, and rotates through the bearing between two vertical boards and is connected with the pivot, the equal fixed mounting in pivot surface left part and surface right part has the axle sleeve, two the equal fixedly connected with connecting block in axle sleeve upper end, two vertical board fixed mounting is in the mounting panel upper end that is located the place ahead, and the equal fixed connection of two connecting blocks is in fixed frame lower extreme front portion.

Preferably, adjustment mechanism includes screw rod and fixed plate, screw rod threaded connection is at connecting plate upper end rear portion, and the screw rod lower extreme runs through the connecting plate and extends to its below, the part surface ring array fixedly connected with a plurality of connecting rod that the screw rod is located the connecting plate below, and the connecting rod keeps away from the common fixedly connected with of one end rotating ring of screw rod, the fixed stabilizer plate that is connected with through bearing rotation in screw rod upper end, stabilizer plate upper end middle part fixed mounting has the fixed block, the fixed plate is provided with two and respectively fixed mounting at fixed frame lower extreme left part and lower extreme right part, and common fixedly connected with center pin between two fixed plates, the fixed block passes through the bearing rotation and connects at.

Preferably, spacing subassembly includes the stopper, stopper fixed mounting is between the mounting panel front end face at connecting plate right-hand member face and be located the rear, and the sliding hole of break-over about the stopper upper end is seted up, it has the gag lever post to alternate sliding connection in the sliding hole, gag lever post upper end fixed mounting has the limiting plate, and its limiting plate is located the stopper top.

Preferably, the lower end of the limiting rod penetrates through the sliding hole and a gap between two adjacent connecting rods and extends to the lower part of the rotating ring.

Preferably, the fastener includes vertical pole, vertical pole fixed mounting is in fixed frame upper end, and vertical pole upper end fixed mounting has the roof, the roof is close to the first extension board of one side fixedly connected with of power generation component, vertical pole surface middle part slidable mounting has the sleeve pipe, and sleeve pipe surface fixed mounting has the second extension board, first extension board upper end middle part threaded connection has the screw thread post, and screw thread post lower extreme runs through first extension board and extends to its below and rotate through the bearing and connect in second extension board upper end middle part, screw thread post upper end fixed mounting has the knob, vertical pole surface is located the cover between roof and the sleeve pipe and is equipped with coil spring, and coil spring's both ends respectively with roof and sleeve pipe fixed connection together.

Preferably, the power generation assembly comprises a substrate, a solar cell panel is laid in the middle of the upper end of the substrate, and limiting grooves are formed in four corners of the upper end of the substrate.

Preferably, the sleeve and the second extension plate are of an integrally formed structure, and the four limiting grooves are respectively located under the four sleeves and the second extension plate.

Preferably, the middle part of the upper end of the fixing frame is provided with a square groove which is penetrated from top to bottom, the upper end of the fixing frame is fixedly provided with an annular supporting plate at the position outside the square groove, and the lower end of the base plate is tightly attached to the upper end of the annular supporting plate.

A mounting method of a solar power generation panel mounting structure comprises the following steps:

a: the whole mounting structure is fixedly mounted on a plane to be mounted by an expansion bolt through a mounting seat and a mounting hole, and connection and fastening are ensured;

b: sequentially rotating the four knobs to enable the four sleeves to drive the four second extension plates to move upwards, placing the power generation assembly on the upper end face of the fixing frame, enabling the four limiting grooves to be located right below the four sleeves and the second extension plates, and reversely rotating the knobs to enable the four sleeves and the second extension plates to be embedded into the limiting grooves below the sleeves and the second extension plates to fix the power generation assembly;

c: the limiting rod is pulled out of the slide hole, the height of the screw rod is controlled by adjusting the rotating ring, the purpose of controlling the inclination angle of the power generation assembly is achieved, and after the rotating ring is adjusted to a proper angle, the limiting rod is inserted into the slide hole.

Compared with the prior art, the invention has the following beneficial effects:

1. this send out through being provided with movable mechanism and adjustment mechanism, the in-process of installing, when needing the inclination of adjustment solar cell panel, only need rotate rotatory ring, make it drive the screw rod through the connecting rod and rotate, because the connected mode of screw rod and steadying plate is the bearing connection to rotation along with the screw rod can make steadying plate and fixed block rise, with the movable mechanism cooperation, reaches the purpose of adjustment solar cell panel's inclination.

2. According to the solar cell panel fixing device, the fastening pieces are arranged, the knob is rotated, the threaded column can move up and down in the vertical direction, when the four sleeves and the second extending plate are embedded into the four limiting grooves, the solar cell panel can be fixed, compared with a fixing mode of a transmission bolt, the solar cell panel fixing device can effectively improve the installation efficiency, and can be convenient to disassemble and maintain while the installation stability is guaranteed.

Drawings

Fig. 1 is an overall structural schematic view of a solar panel mounting structure of the present invention;

fig. 2 is a schematic view of the overall structure of a movable mechanism of a solar panel installation structure of the present invention;

fig. 3 is a schematic view of the overall structure of an adjusting mechanism of a solar panel installation structure of the present invention;

FIG. 4 is a schematic view of the overall structure of a limiting component of the solar panel mounting structure of the present invention;

FIG. 5 is a schematic view showing the overall structure of a fastener of a solar panel installation structure of the present invention;

fig. 6 is a schematic view of the overall structure of a solar panel installation structure of the present invention;

fig. 7 is a schematic view of the installation position of the annular support plate of the solar panel installation structure of the present invention.

In the figure: 1. mounting a plate; 2. a connecting plate; 3. supporting legs; 4. an adjustment mechanism; 41. a screw; 42. a connecting rod; 43. a rotating ring; 44. a stabilizing plate; 45. a fixed block; 46. a fixing plate; 47. a central shaft; 5. a movable mechanism; 51. a vertical plate; 52. a rotating shaft; 53. a shaft sleeve; 54. connecting blocks; 6. a fixing frame; 7. a fastener; 71. a vertical rod; 72. a top plate; 73. a sleeve; 74. a first extension plate; 75. a knob; 76. a coil spring; 77. a threaded post; 78. a second extension plate; 8. a power generation assembly; 81. a substrate; 82. a solar panel; 83. a limiting groove; 9. a limiting component; 91. a limiting block; 92. a slide hole; 93. a limiting plate; 94. a limiting rod; 10. a mounting seat; 11. mounting holes; 12. an annular support plate; 13. a square groove.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1 to 7, a solar panel installation structure and an installation method thereof includes an installation plate 1, two installation plates 1 are provided, and the middle parts of the opposite surfaces of the two mounting plates 1 are fixedly provided with a connecting plate 2 together, the connecting plate 2 and the two mounting plates 1 are in an integrated structure, the left part of the lower end and the right part of the lower end of the two mounting plates 1 are both fixedly provided with supporting legs 3, and 3 equal fixed mounting of lower extreme of supporting legs has mount pad 10, the mounting hole 11 of break-over about having seted up around the up end of mount pad 10, the mounting panel 1 upper end that is located the place ahead is provided with moving mechanism 5, 2 rear portions of connecting plate are provided with adjustment mechanism 4, the common movable mounting in adjustment mechanism 4 and moving mechanism 5 upper end has fixed frame 6, the equal fixed mounting in fixed frame 6 upper end four corners has fastener 7, fixed frame 6 upper end fixed mounting has electricity generation subassembly 8, common fixed mounting has spacing subassembly 9 between 2 right-hand member face of connecting plate and the mounting panel 1 preceding terminal surface that is located the rear.

The movable mechanism 5 comprises two vertical plates 51, the two vertical plates 51 are arranged, a rotating shaft 52 is rotatably connected between the two vertical plates 51 through bearings, shaft sleeves 53 are fixedly mounted on the left portion of the outer surface and the right portion of the outer surface of the rotating shaft 52, connecting blocks 54 are fixedly connected to the upper ends of the two shaft sleeves 53, the two vertical plates 51 are fixedly mounted at the upper end of the mounting plate 1 located in front, and the two connecting blocks 54 are fixedly connected to the front portion of the lower end of the fixed frame 6.

It can be seen that, by providing the movable mechanism 5, the whole fixing frame 6 and the power generation assembly 8 can rotate around the rotating shaft 52, so that the inclination angle of the solar cell panel 82 can be adjusted conveniently, and the solar cell panel can have better illumination conditions.

Adjustment mechanism 4 includes screw rod 41 and fixed plate 46, screw rod 41 threaded connection is at connecting plate 2 upper end rear portion, and the screw rod 41 lower extreme runs through connecting plate 2 and extends to its below, screw rod 41 is located the part of connecting plate 2 below annular array fixedly connected with a plurality of connecting rod 42, and connecting rod 42 keeps away from the common fixedly connected with of one end of screw rod 41 and rotates and be connected with stabilizer plate 44 through the bearing, stabilizer plate 44 upper end middle part fixed mounting has fixed block 45, fixed plate 46 is provided with two and respectively fixed mounting at fixed frame 6 lower extreme left part and lower extreme right part, and common fixedly connected with center pin 47 between two fixed plate 46, fixed block 45 rotates through the bearing and connects in center pin 47 outer surface middle part.

It can be seen that, in the installation process of the present invention, when the inclination angle of the solar cell panel 82 needs to be adjusted, only the rotating ring 43 needs to be rotated to drive the screw rod 41 to rotate through the connecting rod 42, and since the connection manner of the screw rod 41 and the stabilizing plate 44 is a bearing connection, the stabilizing plate 44 and the fixed block 45 can be lifted up along with the rotation of the screw rod 41 to be matched with the movable mechanism 5, so as to achieve the purpose of adjusting the inclination angle of the solar cell panel 82.

Spacing subassembly 9 includes stopper 91, and stopper 91 fixed mounting is between the mounting panel 1 preceding terminal surface at connecting plate 2 right-hand member face and be located the rear, and stopper 91 upper end sets up the slide opening 92 of upper and lower break-over, alternates sliding connection in the slide opening 92 and has gag lever post 94, and gag lever post 94 upper end fixed mounting has limiting plate 93, and its limiting plate 93 is located stopper 91 top.

It should be noted that, the lower end of the limiting rod 94 penetrates through the gap between the sliding hole 92 and the two adjacent connecting rods 42 and extends below the rotating ring 43, that is, the limiting rod 94 is inserted between the two adjacent connecting rods 42, so that the rotating ring 43 can be prevented from rotating continuously, that is, the screw 41 is fixed in the vertical direction, and the inclination angle of the solar panel 82 is kept unchanged.

Fastener 7 includes vertical pole 71, vertical pole 71 fixed mounting is in fixed frame 6 upper end, and vertical pole 71 upper end fixed mounting has roof 72, roof 72 is close to the first extension board 74 of one side fixedly connected with of electricity generation subassembly 8, vertical pole 71 surface middle part slidable mounting has sleeve pipe 73, and sleeve pipe 73 surface fixed mounting has second extension board 78, first extension board 74 upper end middle part threaded connection has threaded post 77, and threaded post 77 lower extreme runs through first extension board 74 and extends to its below and rotate through the bearing and connect in second extension board 78 upper end middle part, threaded post 77 upper end fixed mounting has knob 75, vertical pole 71 surface is located and is equipped with coil spring 76 between roof 72 and the sleeve pipe 73, and coil spring 76's both ends respectively with roof 72 and sleeve pipe 73 fixed connection together.

It should be noted that, electricity generation subassembly 8 includes base plate 81, solar cell panel 82 has been laid at the middle part of base plate 81 upper end, spacing groove 83 has all been seted up at base plate 81 upper end four corners, sleeve pipe 73 is the integrated into one piece structure with second extension board 78, four spacing grooves 83 are located four sleeve pipes 73 respectively and second extension board 78 under, rotatory knob 75, can make threaded post 77 reciprocate in vertical direction, when four sleeve pipes 73 and second extension board 78 imbed four spacing grooves 83, can be fixed solar cell panel 82, compare with the fixed mode of drive bolt, can effectively improve the installation effectiveness, when guaranteeing that the installation is firm, can also be convenient for dismantle the maintenance.

In addition, the middle part of the upper end of the fixing frame 6 is provided with a square groove 13 which penetrates through the upper part and the lower part, the upper end of the fixing frame 6 is fixedly provided with the annular supporting plate 12 at the position outside the square groove 13, and the lower end of the base plate 81 is tightly attached to the upper end of the annular supporting plate 12, so that the heat dissipation and ventilation effects are good, and the weight and the manufacturing cost of the whole mounting structure are reduced.

A mounting method of a solar power generation panel mounting structure comprises the following steps:

a: the whole installation structure is fixedly installed on a plane to be installed through the installation seat 10 and the installation hole 11 by using expansion bolts, and connection and fastening are guaranteed;

b: the four knobs 75 are sequentially rotated to enable the four sleeves 73 to drive the four second extension plates 78 to move upwards, the power generation assembly 8 is placed on the upper end face of the fixed frame 6, the four limiting grooves 83 are located right below the four sleeves 73 and the second extension plates 78, and the four sleeves 73 and the second extension plates 78 are embedded into the limiting grooves 83 below the sleeves and the second extension plates 78 to fix the power generation assembly 8 by reversely rotating the knobs 75;

c: the limit rod 94 is pulled out from the slide hole 92, the height of the screw 41 is controlled by adjusting the rotary ring 43, the purpose of controlling the inclination angle of the power generation assembly 8 is achieved, and after the angle is adjusted to a proper angle, the limit rod 94 is inserted into the slide hole 92.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.