WO2019144279A1

WO2019144279A1 - Inflatable type artificial wave device

Info

Publication number: WO2019144279A1
Application number: PCT/CN2018/073836
Authority: WO
Inventors: 杨子江
Original assignee: 深圳市蔚蓝滨海产业投资有限公司
Priority date: 2018-01-23
Filing date: 2018-01-23
Publication date: 2019-08-01

Abstract

An inflatable type artificial wave device, comprising air cushions (2) and supporting devices (1). The air cushions comprise a first air cushion (21), a second air cushion (22), and a third air cushion (23) which are sequentially connected. The supporting devices (1) support the air cushions (2), so that the first air cushion (21) forms a first slope (2a) which obliquely descends, the second air cushion (22) forms a second slope (2b) which obliquely ascends, and the third air cushion (23) forms a third slope (2c) which obliquely descends. The supporting devices (1) comprise two supporting devices (1) respectively supporting a slope top of the first air cushion (21) and a slope top of the second air cushion (22). The first slope (2a) is higher than the second slope (2b), and the length of the first slope (2a) is larger than the sum of the lengths of the second slope (2b) and the third slope (2c). The inflatable artificial wave device can be conveniently established in different scenes, and can be used for forming waves to achieve a wave making purpose. In addition, the air cushions have elasticity and soft touch, thereby improving people's surfing experience; furthermore, people would not be injured when colliding with the air cushions, so that high safety is implemented.

Description

Inflatable artificial wave device

Technical field

The invention relates to the field of wave-making devices, and in particular to an inflatable artificial wave device.

Background technique

The existing wave-making system needs to be built according to different scenarios, the adaptability is not strong, and the safety is not high.

technical problem

The technical problem to be solved by the present invention is to provide a safe wave-making device that can adapt to different scenarios in view of the above-mentioned drawbacks in the prior art.

Technical solution

The technical solution adopted by the present invention to solve the technical problem is: constructing an inflatable artificial wave device, comprising an air cushion and a supporting device; the air cushion comprises a first air cushion, a second air cushion and a third air cushion connected in sequence, and the supporting device supports the air cushion, So that the first air cushion forms a first slope that is inclined to descend, the second air cushion forms a second slope that is inclined to rise, and the third air cushion forms a third slope that is inclined downward;

The supporting device includes two supporting devices respectively supporting the top of the first air cushion and the top of the second air cushion;

The first ramp is higher than the second ramp, and the length of the first ramp is greater than the sum of the lengths of the second ramp and the third ramp.

Preferably, the side walls are provided on both sides of the air cushion, and the side walls and the air cushion define a passage on the air cushion.

Preferably, the side walls are integral; or the side walls include a plurality of side walls respectively corresponding to the respective air cushions and side wall films that compensate for the gap between the adjacent two side walls.

Preferably, the sidewall film is an elastic film.

Preferably, the side wall is an air bag.

Preferably, at the top of the slope of the first slope, a first air cushion film connected to the first air cushion is disposed, and a first support space is formed between the first air cushion film and the first air cushion;

At the top of the second slope, the second air cushion is connected to the upper edge of the third air cushion through the second air cushion film, the second air cushion is connected to the lower edge of the third air cushion, and the second air cushion, the third air cushion and the second air cushion Forming a second support space between the air cushion films;

At the bottom of the second slope, the first air cushion is connected to the upper edge of the second air cushion, and the first air cushion and the lower edge of the second air cushion are connected by the third air cushion film, the first air cushion, the third air cushion and the third air cushion Forming a third support space between the air cushion films;

A fourth air cushion film connected to the third air cushion is disposed at a bottom of the third slope, and a fourth support space is formed between the fourth air cushion film and the third air cushion.

The supporting device supporting the top of the first air cushion includes a first supporting portion laterally penetrating in the first supporting space and a first supporting portion longitudinally supporting the first supporting portion; and supporting means for supporting the top of the second air cushion including transversely wearing respectively Second, third, and fourth support portions in the second, third, and fourth support spaces and a second support that longitudinally supports the second, third, and fourth support portions.

Preferably, the air cushion further includes a fourth air cushion, and the first, second, third, and fourth air cushions are sequentially connected;

At the bottom of the third slope, the third air cushion is connected to the upper edge of the fourth air cushion, and the third air cushion and the lower edge of the fourth air cushion are connected by the fourth air cushion film, the third air cushion, the fourth air cushion and the fourth air cushion A fourth support space is formed between the air cushion films.

Preferably, each of the air bearing films is an elastic film.

Preferably, the inflatable artificial wave device comprises a water leakage zone disposed under the fourth air cushion, and the fourth air cushion is provided with a water leakage gap for the water of the fourth air cushion surface to leak into the water leakage zone through the water leakage gap.

Preferably, the first bracket includes a first link and a second link rotatably connected to the first support at one end to adjust the distance between the other ends of the first link and the second link, thereby adjusting the first slope the height of.

Preferably, the second bracket includes a third link and a fourth link rotatably connected to the second support at one end, and the other ends of the third link and the fourth link respectively follow the third support and the fourth support The portions are connected to adjust the spacing between the third support portion and the fourth support portion to adjust the heights of the second slope and the third slope.

Beneficial effect

The technical solution of the present invention has at least the following beneficial effects: the inflatable artificial wave device of the present invention can be conveniently established in different scenes, can be used to form a wave, realize the purpose of wave making, and can be used for people to surf; in other words, The water flows through the first slope, the second slope and the third slope. In addition, the air cushion is elastic and soft to the touch, which enhances the experience of people surfing, and people are not injured when they touch the air cushion, and the safety is high.

DRAWINGS

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, in which:

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a front elevational view of an inflatable artificial wave device in a preferred embodiment of the present invention.

Fig. 2 is a front elevational view of the air cushion of the inflatable artificial wave device of Fig. 1.

Figure 3 is a perspective view of the air cushion of Figure 3.

Fig. 4 is a front elevational view of the inflatable artificial wave device of Fig. 1.

Fig. 5 is a perspective view of a supporting device of the inflatable artificial wave device of Fig. 1.

Fig. 6 is a front elevational view showing an air cushion of the inflatable artificial wave device in another embodiment.

Fig. 7 is a front elevational view of the air cushion of the inflatable artificial wave device in still another embodiment.

Figure 8 is a right side view of the air cushion of Figure 6.

Figure 9 is a right side elevational view of another embodiment of the air cushion of Figure 6.

Figure 10 is a plan view of the inflatable artificial wave device of Figure 1.

Figure 11 is a front elevational view of the inflatable artificial wave device in still another embodiment.

Figure 12 is a front elevational view of the air cushion of the inflatable artificial wave device of Figure 11;

Figure 13 is a schematic view showing the installation of the inflatable artificial wave device of Figure 1 on a river bed.

Figure 14 is a schematic view showing the installation of the inflatable artificial wave device of Figure 1 on the lakeshore.

Figure 15 is a schematic view showing the installation of the inflatable artificial wave device of Figure 1 on a beach.

16 and 17 are schematic views showing the installation of the inflatable artificial wave device of Fig. 1 in a swimming pool.

Figure 18 is a plan view showing an embodiment of a fourth air cushion of the pneumatic artificial wave device of the present invention.

Figure 19 is a plan view showing another embodiment of the fourth air cushion of the inflatable artificial wave device of the present invention.

The reference numerals in the figure indicate the support device 1, the first support portion 101, the first bracket 111, the first link 111a, the second link 111b, the second support portion 102, the third support portion 103, and the fourth support portion 104. a second bracket 112, a third link 112a, a fourth link 112b, an air cushion 2, a first air cushion 21, a second air cushion 22, a third air cushion 23, a fourth air cushion 24, a first air cushion film 21a, and a second air cushion Film 22a, third air cushion film 23a, fourth air cushion film 24a, first support space 21b, second support space 22b, third support space 23b, fourth support space 24b, first slope 2a, second slope 2b, The three slopes 2c, the side walls 3, the side wall film 30, the water supply unit 4, the passage 5, the base structure 6, the support tube 61, the support pad 62, and the walking platform 7.

Embodiments of the invention

For a better understanding of the technical features, objects and effects of the present invention, the embodiments of the present invention are described in detail with reference to the accompanying drawings. In the description of the inflatable artificial wave device of the present invention, it is to be understood that the terms "front", "back", "upper", "lower", "front", "back" and the like are merely for the convenience of describing the present invention. The technical solutions are not intended to indicate a particular orientation, and thus are not to be construed as limiting the invention.

As shown in FIG. 1-12, an inflatable artificial wave device according to a preferred embodiment of the present invention includes an air cushion 2 and a supporting device 1; the air cushion 2 includes a first air cushion 21, a second air cushion 22 and a third air cushion 23 which are sequentially connected. The support device 1 supports the air cushion 2 such that the first air cushion 21 forms a first slope 2a that is inclined downward, the second air cushion 22 forms a second slope 2b that is inclined upward, and the third air cushion 23 forms a third slope 2c that is inclined downward. It can be understood that the slope bottom of the first slope 2a is the slope bottom of the second slope 2b, and the slope bottom of the second slope 2b is the slope top of the third slope 2c.

The supporting device 1 includes two supporting devices 1 respectively supporting the top of the first air cushion 21 and the top of the second air cushion 22;

The inflatable artificial wave device can be conveniently built in different scenarios, such as inland or small rivers, lakes, and the like. When the inflatable artificial wave device is used, the water flow can flow down from the top of the first slope 2a, and the water flow rises through the second slope 2b, and then turns over the top of the second slope 2b to form a wave, thereby achieving the purpose of wave making. It is available for people to surf; in other words, the water flows through the first slope 2a, the second slope 2b and the third slope 2c. In addition, the air cushion 2 is elastic and soft to the touch, which enhances the experience of people surfing, and people who touch the air cushion 2 are not injured and have high safety.

The first slope 2a is higher than the second slope 2b, and the length of the first slope 2a is greater than the sum of the lengths of the second slope 2b and the third slope 2c to ensure that the water flow can form a wave.

The inflatable artificial wave device may further include side walls 3 provided on both sides of the air cushion, and the side walls 3 and the air cushion 2 define a passage 5 on the air cushion 2 for the water supply to pass therethrough. The side wall 3 acts to constrain the flow of water and other objects circulating in the passage 5, for example, people pass through the passage 5 along the flow of water, and the side walls 3 allow one to avoid crossing the sides of the air cushion. The side wall 3 may be integral, and its length may be adapted to the sum of the lengths of the respective slopes, extending from the first air cushion 21 to the third air cushion 23; or, the side wall 3 may not be integral, which may include The plurality of side walls 3 corresponding to the air cushion and the side wall film 30 for compensating for the gap between the adjacent two side walls 3 include, for example, first and first corresponding to the first, second, and third air cushions 21, 22, and 23, respectively. Second, the third side wall; the side wall film 30 is used to connect the respective side walls 3 into a continuous unit and prevent water from flowing out of the gaps of the respective side walls 3. The sidewall film 30 is preferably an elastic film which can be elastically stretched to avoid damage of the sidewall film 30 due to external force stretching, and also provides greater movement of the sidewalls 3 by elastic stretching of the sidewall film 30. Room and buffer. Among them, the side wall 3 is preferably an air bag to prevent people from being injured when they hit the side wall when surfing. Further, as shown in Fig. 8, the side wall 3 may be vertical, as shown in Fig. 9, or may be inclined.

At the top of the first slope 2a, a first air cushion film 21a connected to the first air cushion 21 may be provided, and a first support space 21b is formed between the first air cushion film 21a and the first air cushion 21;

At the top of the second slope 2b, the second air cushion 22 may be connected to the upper edge of the third air cushion 23 through the second air cushion film 22a, and the second air cushion 22 is connected to the lower edge of the third air cushion 23, the second air cushion 22. A second support space 22b is formed between the third air cushion 23 and the second air cushion film 22a; thus, the second air cushion 22 and the third air cushion 23 are relatively rotatable by the extended edge.

At the bottom of the second slope 2b, the first air cushion 21 may be connected to the upper edge of the second air cushion 22, and the first air cushion 21 and the lower edge of the second air cushion 22 are connected by the third air cushion film 23a, the first air cushion 21. A third support space 23b is formed between the third air cushion 23 and the third air cushion film 23a; thus, the first air cushion 21 and the second air cushion 22 are relatively rotatable along the upper edge.

At the bottom of the third slope 2c, a fourth air cushion film 24a connected to the third air cushion 23 may be provided, and a fourth support space 24b is formed between the fourth air cushion film 24a and the third air cushion 23.

The supporting device 1 supporting the crest of the first air cushion 21 includes a first supporting portion 101 laterally penetrating in the first supporting space 21b and a first bracket 111 longitudinally supporting the first supporting portion 101; a top portion supporting the second air cushion 22 The supporting device 1 includes second, third, and fourth supporting portions 102, 103, 104 that are transversely inserted in the second, third, and fourth supporting spaces 22b, 23b, and 24b, respectively, and longitudinally supporting the second and third portions. The second bracket 112 of the fourth support portion 102, 103, 104.

In addition, as shown in FIGS. 11 and 12, the air cushion may further include a fourth air cushion 24, and the first, second, third, and fourth air cushions 21, 22, 23, and 24 are sequentially connected; at the bottom of the third slope 2c. The third air cushion 23 is connected to the upper edge of the fourth air cushion 24, and the third air cushion 23 and the lower edge of the fourth air cushion 24 are connected by the fourth air cushion film 24a, and the third air cushion 23, the fourth air cushion 24 and the fourth air cushion A fourth support space 24b is formed between the films 24a such that the third air cushion 23 and the fourth air cushion 24 are relatively rotatable along the upper edge. The fourth air cushion 24 is laterally disposed, or slightly inclined, but the inclined height is smaller than the height of the third slope 2c, and the people for the water supply flow and surfing leave the air cushion. Wherein, each of the air cushion films is preferably an elastic film, which can be elastically stretched to avoid damage of the air cushion film by external force stretching, and also provides more room and buffer for the relative activities of the air cushions by elastic stretching of the air cushion film. .

The first bracket 111 may include a first link 111a and a second link 111b that are rotatably connected to the first support portion 101 at one end, and the third link 112a and the fourth link 112b are at an angle to adjust the first The distance between the other end of the link 111a and the second link 111b further adjusts the height position of the first support portion 101 to adjust the height of the first slope 2a. The other ends of the first link 111a and the second link 111b may be slidably disposed on the slide rail to adjust the spacing between the two, thereby adjusting the height of the first slope 2a; or, the first bracket There are a plurality of card positions at the bottom of the 111, and the other ends of the first link 111a and the second link 111b are fixed in the card position, and the other ends of the first link 111a and the second link 111b are stuck on different cards. Position adjusting the spacing of the other ends of the first link 111a and the second link 111b to adjust the height of the first slope 2a; or alternatively, at least one of the first link 111a and the second link 111b is The telescopic is adjusted to adjust the length by telescopic, thereby adjusting the height of the first slope 2a.

The second bracket 112 may include a third link 112a and a fourth link 112b whose one end is rotatably coupled to the second support portion 102, and the other ends of the third link 112a and the fourth link 112b respectively follow the third support portion 103 is connected to the fourth support portion 104, and the third link 112a and the fourth link 112b are at an angle to adjust the pitch of the third support portion 103 and the fourth support portion 104 (ie, adjust the third link 112a and the first The distance between the other ends of the four links 112b) adjusts the height position of the second support portion 102 to adjust the heights of the second slope 2b and the third slope 2c. The other ends of the third link 112a and the fourth link 112b may be slidably disposed on the slide rail to adjust the pitch of the third support portion 103 and the fourth support portion 104, thereby adjusting the second slope 2b and The height of the third slope 2c; or, the bottom of the second bracket 112 is provided with a plurality of card positions, and the other ends of the third link 112a and the fourth link 112b are fixed in the card position by the third link 112a and the The other end of the four links 112b is stuck at a different card position, and the pitch adjustment of the third support portion 103 and the fourth support portion 104 is realized, thereby adjusting the heights of the second slope 2b and the third slope 2c.

Furthermore, adjusting the support device 1 can change the length and height dimensions of the various ramps so that the inflatable artificial wave device can adapt to different terrains.

The inflatable artificial wave device may include a water supply unit 4 having a water outlet provided at the top of the slope of the first slope 2a to supply water from the top of the first slope 2a, and the water flow sequentially through the first, second, and third slopes Form a wave. Alternatively, instead of including the water supply unit 4, the inflatable artificial wave device may be used in water, for example, in a river, in a sea, or in a swimming pool.

The inflatable artificial wave device of the present invention can be installed in beaches, rivers, and swimming pools. As shown in Fig. 13, when used on a river bed, the other end of the first, second, third and fourth links can be fixed to the river bed to effect installation of the inflatable artificial wave device.

The inflatable artificial wave device may further include a base structure 6 for fixing the first bracket 111 and the second bracket 112. As shown in FIG. 14, when the inflatable artificial wave device is used on the lake shore, the foundation structure 6 is fixed on the lake shore, and includes two sets of bracket tubes 61 and a buoyancy support pad 62 for supporting the bracket tube 61 below the bracket tube 61, The bracket tube 61 is fixed on the lake shore, and the buoyancy support pad 62 below is located in the lake water, and functions to support the bracket tube 61. The first bracket 111 and the second bracket of the inflatable artificial wave device can be fixedly connected to the bracket tube 6171. 112. As shown in FIG. 15, when the inflatable artificial wave device is used on a beach, the foundation structure 6 is fixed on the beach, and includes two sets of slide rails for movably connecting the first bracket 111 and the second bracket 112, and the slide rails. The first bracket 111, the second bracket 112, the water supply unit, and the like are slidably disposed on the slide rail, and the first bracket 111, the second bracket 112, the water supply system, and the like can be adjusted according to the tidal water condition on the beach. The location can be adapted to different situations.

As shown in FIGS. 16-17, when the inflatable artificial wave device is used on a swimming pool, the base structure 6 is fixed to the swimming pool, and includes two sets of bracket tubes 61 and a support tube bracket 61 below the bracket tube 61 for supporting the bracket tube 61. The support pad 62 is fixed to the swimming pool wall, and the support pad 62 is located in the swimming pool to support the support tube 61. The support tube 61 can be fixedly connected to the first bracket 111 of the artificial wave device. The second bracket 112 and the like; in addition, the artificial wave device may further include a walking platform 7 located around the swimming pool for the convenience of people to walk so that people can leave after surfing or surfing. In addition, a water leakage zone 8 located below the fourth air cushion 24 may be disposed in the swimming pool, and the water flowing down from the air cushion may further leak to the water leakage area 8. In order to make the water on the surface of the air cushion easily leak down quickly, the water leakage zone 8 may be composed of a relatively strong steel mesh at the bottom and a fourth air cushion 24 above. The fourth air cushion 24 is provided with a water leakage gap for the water on the surface of the fourth air cushion 24 to leak into the water leakage area through the water leakage gap. For example, the fourth air cushion 24 can be made into a fence to form a leaky water. The slit is as shown in Fig. 18; or it is made into a mesh shape and has a relatively small leaky air passage, as shown in Fig. 19. However, the slits and empty passages should be 2-4 cm wide and will not hold the fingers; at the same time, they can be 10 cm to more than one meter long, both to maintain the load-bearing structure of the fourth air cushion 24, and to ensure water Quickly leaked. The water supply unit 4 can extract water leaking from the water leakage area 8 and recycle it.

The inflatable valve of the air cushion of the inflatable artificial wave device can be extended to a control system to change the shape and change the shape of the wave by adjusting the air pressure.

The mode of the supporting device 1 is not necessarily metal, but may be an inflated cylindrical airbag, or a relatively strong tensile film reinforced by the surface of the airbag, mainly capable of maintaining and supporting the overall shape of the air cushion, and providing a sufficiently strong portion to be The whole is fixed in the pool or other surrounding environment.

In summary, the inflatable artificial wave device of the present invention can be conveniently built in different scenes, can be used to form waves, achieve the purpose of wave making, and can be used for people to surf; in other words, the water flows through the first slope 2a. a second ramp 2b and a third ramp 2c. In addition, the air cushion is elastic and soft to the touch, which enhances the experience of people surfing, and people are not injured when they touch the air cushion, and the safety is high. And by adjusting the support device 1, the inclination of each air cushion can be adjusted, and the height of each slope can be adjusted to change the intensity of the wave.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications, combinations and changes may be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. within the spirit and scope of the invention are intended to be included within the scope of the appended claims.

Claims

An inflatable artificial wave device, comprising: an air cushion (2) and a supporting device (1); the air cushion comprises a first air cushion (21), a second air cushion (22) and a third air cushion (23) connected in sequence The support device (1) supports the air cushion (2) such that the first air cushion (21) forms a first slope (2a) that is inclined downward, and the second air cushion (22) forms a tilted rise. a second slope (2b) and the third air cushion (23) forms a third slope (2c) that is inclined downward;

The supporting device (1) includes two supporting devices (1) respectively supporting the top of the first air cushion (21) and the top of the second air cushion (22);

The first slope (2a) is higher than the second slope (2b), and the length of the first slope (2a) is greater than the length of the second slope (2b) and the third slope (2c) with.
The inflatable artificial wave device according to claim 1, comprising a side wall (3) provided on both sides of the air cushion, the side wall (3) and the air cushion (2) being defined at the Said channel (5) on the air cushion (2).
The inflatable artificial wave device according to claim 2, wherein the side wall (3) is integrated; or the side wall (3) includes a plurality of side walls respectively corresponding to each of the air cushions (3) and a sidewall film (30) that compensates for the gap between the adjacent two of the side walls (3).
The inflatable artificial wave device according to claim 3, wherein the side wall film (30) is an elastic film.
The inflatable artificial wave device according to any one of claims 2 to 4, characterized in that the side wall (3) is an air bag.
The inflatable artificial wave device according to claim 1, characterized in that at the top of the slope of the first slope (2a), a first air cushion film (21a) connected to the first air cushion (21) is provided a first support space (21b) is formed between the first air cushion film (21a) and the first air cushion (21);

At the top of the second slope (2b), the second air cushion (22) and the upper edge of the third air cushion (23) are connected by a second air cushion film (22a), and the second air cushion (22) Connecting with the lower edge of the third air cushion (23), forming a second supporting space between the second air cushion (22), the third air cushion (23) and the second air cushion film (22a) (22b);

At a bottom of the second slope (2b), the first air cushion (21) is coupled to an upper edge of the second air cushion (22), the first air cushion (21) and the second air cushion ( The lower edge of 22) is connected by a third air cushion film (23a), and a third supporting space is formed between the first air cushion (21), the third air cushion (23) and the third air cushion film (23a) (23b);

At a bottom of the third slope (2c), a fourth air cushion film (24a) connected to the third air cushion (23), the fourth air cushion film (24a) and the third air cushion (23) are provided. Forming a fourth support space (24b) between;

The support device (1) supporting the crest of the first air cushion (21) includes a first support portion (101) laterally penetrating in the first support space (21b) and longitudinally supporting the first support a first bracket (111) of the portion (101); a supporting device (1) supporting a hill top of the second air cushion (22) includes transversely penetrating the second, third, and fourth supporting spaces (22b, respectively) Second, third, and fourth support portions (102, 103, 104) of 23b, 24b) and second brackets longitudinally supporting said second, third, and fourth support portions (102, 103, 104) 112).
The inflatable artificial wave device according to claim 6, wherein the air cushion further comprises a fourth air cushion (24), the first, second, third and fourth air cushions (21, 22, 23, 24) connected in sequence;

At a bottom of the third slope (2c), the third air cushion (23) is coupled to an upper edge of the fourth air cushion (24), and the third air cushion (23) and the fourth air cushion ( The lower edge of 24) is connected by the fourth air cushion film (24a), and the third air cushion (23), the fourth air cushion (24) and the fourth air cushion film (24a) form the The fourth support space (24b).
The inflatable artificial wave device according to claim 7, comprising a water leakage zone (8) disposed under the fourth air cushion (24), wherein the fourth air cushion (24) is provided with a water leakage gap. Water for the surface of the fourth air cushion (24) leaks into the water leakage zone (8) through the water leakage gap.
The inflatable artificial wave device according to any one of claims 6 to 7, wherein the first bracket (111) includes a first connection that is rotatably connected to the first support portion (101) at one end. a rod (111a) and a second link (111b) for adjusting a distance between the other ends of the first link (111a) and the second link (111b) to adjust the first slope (2a) the height of.
The inflatable artificial wave device according to any one of claims 6 to 7, wherein the second bracket (112) includes a third connection that is rotatably connected to the second support portion (102) at one end. a rod (112a) and a fourth link (112b), the other ends of the third link (112a) and the fourth link (112b) respectively following the third support portion (103) and the first Four support portions (104) are connected to adjust a spacing between the third support portion (103) and the fourth support portion (104) to adjust the second slope (2b) and the third slope (2c) )the height of.