CN111661237A - Boat with foldable bottom plate - Google Patents

Abstract

The invention relates to a boat equipped with a foldable bottom plate. The bottom of the cabin is provided with a bottom plate that can be laid flat and can be folded after being separated from the boat. There is a hinge part between the two adjacent bottom plate assemblies that can make the two bottom plate assemblies rotate relative to each other so that the bottom plate is in a folded state, a fixed sleeve is installed on the front side of the cabin, and the front side of the bottom plate is inserted into the fixed sleeve. The left and right ends of the bottom plate are respectively inserted into the lower sides of the left and right air bags. The upper side of the bottom cloth is fixedly installed with a support air bag, which extends from the front side of the cabin to the rear side of the cabin, and the upper side of the support air bag is against the The bottom of the bottom of the ship's floor. The boat equipped with the foldable bottom plate not only has the advantages of being foldable and small in storage volume, but also has a solid and reliable bottom plate during the use of the boat, which is convenient for walking, and can improve the safety of people walking on the boat.

Description

A boat with a foldable bottom plate

technical field

The invention relates to the field of boats, in particular to a boat equipped with a foldable bottom plate.

Background technique

The main material of the inflatable boat is rubber or PVC, and its main structure includes airbags 1 located on the left and right sides of the hull. The front ends of the two airbags 1 are connected to each other at the head of the hull to form the bow; the tail of the hull is fixedly installed There is a stern plate 6 to form the stern. The rear ends of the two air bags 1 are connected to both sides of the stern plate. By installing a propeller on the stern plate 6, the sailing speed of the inflatable boat can be improved. The bottom cloth 8 is fixedly installed, and the bottom cloth 8 is located between the bow and the stern plate 6 to serve as the bottom plate of the boat, so that the area above the bottom cloth 8 constitutes a cabin for people to ride, and in order to reduce the size of the inflatable boat. The resistance when sailing, the bow is generally slightly tilted upwards. Compared with hard-hulled boats, inflatable boats are not only much cheaper to manufacture, but also more convenient to clean, transport and store. At present, inflatable boats are widely used, including military boats for troops to cross rivers and seas, flood control boats for armed police flood control and rescue, fully manual kayaks, and drift boats, fishing boats, etc. for life and entertainment.

During the use of the existing inflatable boat, it is found that the bottom cloth 8 at the bottom of the cabin is relatively soft. Even if the bottom plate of the inflatable airbag type is adopted, there are still such problems. The feeling of stepping on the cotton makes it easy for people to walk unstably on the bottom of the boat, and even after launching, there will be a certain degree of safety hazard. In order to cope with this situation, a hard bottom plate can be installed on the bottom cloth 8. When people step on the hard bottom plate, it feels more solid and stable, and it is easy to walk. But one of the reasons why people use inflatable boats is because of inflatable boats. The boat can be folded and is easy to carry. After deflation, the inflatable boat only takes up a small volume. The material of the hard bottom plate determines that it cannot be folded. Although the hull can be deflated for storage, the hard bottom plate occupies a large amount of space. The volume, which makes the inflatable boat with a hard bottom plate in a very embarrassing position, needs to be improved.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a solid and stable inflatable boat with a bottom plate that can be folded and stored in view of the above problems.

In order to achieve the above purpose, the present invention is a boat equipped with a foldable bottom plate. There are fixed sleeves, the front side of the bottom plate is inserted into the fixed sleeve, and the left and right ends of the bottom plate are inserted into the lower sides of the left and right air bags respectively.

When using an inflatable boat, first inflate the airbag on the boat. When the airbag is inflated to an appropriate size, place the bottom plate at the bottom of the cabin, and then inflate the airbag until the inflation is completed. It can be used by people to step on it. When the boat needs to be folded and stored, first deflate the airbag, and then fold it. Similarly, the bottom plate of the boat can also be folded and stored, which is convenient for storage. The used bottom plate not only has the advantages of being able to be folded and having a small storage volume, but also during the use of the boat, the bottom plate is firm and reliable, which is convenient for walking, and can improve the safety of people walking on the boat.

Regarding the specific structure of the fixed sleeve, the fixed sleeve includes a tensioning cloth that is fixedly installed on the bottom cloth of the ship. The two sides and the rear of the tensioning cloth are respectively fixedly connected to the bottom of the ship. The tensioning cloth and the bottom of the ship form a fixed open back set. After the above structure is adopted, the bottom of the ship can be inserted into the lower side of the tensioning cloth, and the bottom of the ship can be limited and fixed by the tensioning cloth. The boat produces relative slip.

A support airbag is fixedly installed on the upper side of the bottom cloth, and the support airbag extends from the front side of the cabin to the rear side of the cabin. The inflation and deflation ports are located on the front side of the cabin, and the tensioning cloth is provided with an escape port corresponding to the inflation and deflation ports. After adopting the above structure, the inflated supporting airbags are stretched on the underside of the bottom of the ship to prevent the bottom of the ship from being excessively upward. Bend to ensure the flatness of the bottom of the boat.

Regarding the connection relationship between the left and right sides of the bottom plate and the boat, the connecting part of the bottom cloth and the air bag is provided with a gap, and the left and right sides of the bottom plate are pressed against the two gaps on the left and right.

Regarding the foldable structure of the bottom plate, the bottom plate includes a plurality of bottom plate assemblies that are connected together front and rear, and a hinge portion is provided between two adjacent bottom plate assemblies that can relatively rotate the two bottom plate assemblies so that the bottom plate is in a folded state. The bottom plate realizes the folding of a plurality of bottom plate assemblies through the hinge part, so as to facilitate the folding and storage of the bottom plate. When installing the bottom plate, the side that can be bent and folded should be installed upwards, that is, the bottom plate can only be bent upwards, not downwards.

Regarding the first embodiment of the hinged portion, the hinged portion includes a chute located on the rear side of the base plate assembly and extending left and right, the chute is in the shape of an arc, a limit block is provided above the chute, and the lower side of the limit block is provided with a direction A card slot with a lower opening; the hinge part also includes a tab fixed on the front side of the bottom plate assembly, the tab is clamped in the chute of the adjacent front side bottom plate assembly, and the lower side of the tab has a sliding fit with the slide slot. On the arc surface, a spherical crown turning tongue is fixed on the upper side of the card tongue, and the spherical crown turning tongue leans against the card groove and rotates with it. After the above structure is adopted, the hinge parts are arranged on the front and rear sides of the bottom plate assembly, which is an integral structure with the bottom plate assembly. To assemble the combined bottom plate, it is only necessary to insert the tongue and the spherical crown turning tongue from the side of the chute, and the installation is convenient. Moreover, since the hinge part and the bottom plate assembly are an integral structure, they can bear a large downward pressure, are solid and durable, and are not easy to be damaged.

Regarding the second embodiment of the hinge portion, the hinge portion includes a hinge installed between the front and rear bottom plate assemblies, and the two fixing portions of the hinge are respectively fixed and installed on two adjacent bottom plate assemblies. After the above structure is adopted, the relative rotation of the two adjacent bottom plate assemblies is realized through hinges, the hinge structure is adopted, and the cost is low, and the processing cost of the bottom plate assemblies is low.

Regarding the specific structure of the limit block, the upper side of the limit block is flush with the upper side of the bottom plate assembly, the rear end of the limit block is provided with a rounded transition to avoid the tab, and the inner side of the slot is rotated with the spherical crown. A curved surface that fits the tongue. During the folding or flattening process of the bottom plate assembly, the limit block is not in contact with the card slot. In order to make the folding or flattening process of the base plate assembly smoother, the circular arc surface of the tongue coincides with the outer spherical surface of the spherical crown turning tongue, the inner side surface of the clamping groove, and the arc surface of the sliding groove.

In order to ensure that the flat and folded states of the bottom plate are more stable, the front side of the bottom plate assembly is provided with a folding limit surface that presses against the upper side of the limit block when the bottom plate assembly is folded, and the folding limit surface is located on the upper side of the tab. The rear side of the bottom plate assembly and the front side of the adjacent bottom plate assembly on the rear side are both provided with flat limit surfaces that press against each other when the bottom plate is flat, and the flat limit surfaces are located on the lower side of the tab. After the above structure is adopted, when the bottom plate is in a flat state, the flat limiting surfaces of two adjacent bottom plate assemblies are pressed against each other, which can prevent the bottom plate assembly from continuing to fold backwards and ensure the stability of the bottom plate.

In order to reduce the weight of the bottom plate and facilitate the navigation of the inflatable boat, the bottom plate assembly is provided with a left and right penetrating cavity, and the left and right ends of the bottom plate assembly are provided with protective plugs, which are blocked on the chute, and the protective plugs are close to the bottom plate assembly. A fixing plug is fixed on one side, and the fixing plug is inserted into the inner cavity. After the above structure is adopted, the bottom plate assembly is a hollow structure, which can greatly reduce the weight of the bottom plate and reduce the material cost of the bottom plate assembly; the protective plugs at the left and right ends of the bottom plate assembly can prevent the sharp bottom plate assembly from being scratched and inflated. In addition, because the protective plug is blocked on the chute, it can prevent the tab from slipping out of the chute and avoid the separation and disintegration of the bottom plate assembly.

In order to facilitate the fixing of the bottom plate, the bottom plate assembly located at the rear end of the bottom plate is a positioning assembly. The positioning assembly is folded upwards. The positioning assembly and the stern plate are provided with corresponding connecting holes. Bolts for the fixed connection of the components to the stern plate. Before fixing the bottom plate of the ship, you can first open the installation holes corresponding to the connection holes on the stern plate, or fix the bolts corresponding to the connection holes on the stern plate, use the bolts to pass through the connection holes, and then fix them with nuts to complete the installation of the bottom plate. .

Due to the application of the above technical solutions, the advantages and effects of the present invention are specifically analyzed below.

To sum up, when using the inflatable boat in the present invention, the airbag on the boat is inflated first, and when the airbag is inflated to an appropriate size, the bottom plate of the boat is placed at the bottom of the cabin, and then the airbag is inflated until the inflation is completed. , the bottom plate at the bottom of the cabin can be used by people to step on it. When the boat needs to be folded and stored, first deflate the airbag and then fold it. Similarly, the bottom plate of the boat can also be folded and stored, which is convenient Storage, the bottom plate used in the device not only has the advantages of being foldable and small in storage volume, but also solid and reliable during the use of the boat, which is convenient for walking, and can improve the safety of people walking on the boat. In addition, a support airbag is installed on the underside of the bottom of the ship, and the support airbag is inflated and expanded on the underside of the bottom of the ship to prevent the bottom of the ship from bending upwards excessively and ensure the flatness of the bottom of the ship.

Description of drawings

The specific embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings:

Fig. 1 is the top view structure schematic diagram of the present invention;

Fig. 2 is a cross-sectional structure schematic diagram along D-D line in Fig. 1;

Fig. 3 is the sectional structure schematic diagram along the C-C line in Fig. 1;

Fig. 4 is the top view structure schematic diagram of the bottom plate of the ship;

Fig. 5 is the partial enlarged structure schematic diagram of point E in Fig. 2;

Fig. 6 is a partial enlarged structural schematic diagram of point F in Fig. 3;

7 is a schematic structural diagram of the first embodiment of the hinge portion;

8 is a schematic structural diagram of the base plate assembly in a folded state;

Fig. 9 is the structural representation that the bottom plate of the ship is in a flat state;

Figure 10 is a schematic structural diagram of a protective plug;

Fig. 11 is a partial enlarged structural schematic diagram of point B in Fig. 9;

Figure 12 is a schematic cross-sectional structure diagram along the line A-A in Figure 7;

FIG. 13 is a schematic diagram of the left side view of FIG. 7 .

In the figure: bottom plate assembly 1, hinge part 2, bottom plate 3, positioning assembly 4, air bag 5, bottom plate 6, chute 7, snap tongue 8, limit block 9, snap groove 10, spherical crown turning tongue 11, folding Limiting surface 12, inner cavity 13, protective plug 14, fixing plug 15, connecting hole 16, rounded transition 17, flat limiting surface 18, fixing sleeve 19, air charging and discharging port 20, escape port 21, stern plate 22, inflation The boat 23 , the bottom cloth 24 , the support air bag 25 , the tension cloth 26 , and the seam 27 .

Detailed ways

Referring to the accompanying drawings, a boat equipped with a foldable bottom plate of the present invention, the bottom of the cabin is installed with a bottom plate that can be tiled and can be folded after being separated from the boat, and a fixed sleeve 19 is installed on the front side of the cabin, The front side of the bottom plate is inserted into the fixing sleeve 19 , and the left and right ends of the bottom plate are respectively inserted into the lower sides of the left and right air bags 5 . When using the inflatable boat 23, referring to FIG. 1, first inflate the airbag 5 on the boat, when the airbag 5 is inflated to an appropriate size, place the bottom plate on the bottom of the cabin, and then inflate the airbag 5, Until the inflation is completed, the bottom plate at the bottom of the cabin can be used by people to step on it. When the boat needs to be folded and stored, the airbag 5 is first deflated and then folded. Similarly, the bottom plate can also be folded It is convenient for storage. The bottom plate used in this device not only has the advantages of being able to be folded and having a small storage volume, but also in the process of using the boat, the bottom plate of the boat is solid and reliable, which is convenient for walking, which can improve the time when people walk on the boat. security.

Regarding the specific structure of the fixing sleeve 19, the fixing sleeve 19 includes a tensioning cloth 26 fixedly installed on the bottom cloth 24, the two sides and the rear edge of the tensioning cloth 26 are respectively fixedly connected with the bottom cloth 24, and the tensioning cloth 26 is connected with the bottom cloth of the ship. 24 constitutes a rearwardly open fixing sleeve 19 . After the above structure is adopted, the bottom of the ship can be inserted into the lower side of the tensioning cloth 26, the bottom of the ship can be limited and fixed by the tensioning cloth 26, and the inflated airbag 5 can be pressed against the upper side of the bottom of the ship, which can prevent the There is relative slippage between the bottom plate and the boat.

Referring to Figures 3 and 6, the upper side of the bottom cloth 24 is fixedly installed with a supporting air bag 25, the supporting air bag 25 extends from the front side of the cabin to the rear side of the cabin, and the upper side of the supporting air bag 25 is against the bottom of the bottom plate of the ship , the support air bag 25 is provided with an inflation and deflation port 20 . The inflation and deflation port 20 is located on the front side of the cabin, and the tensioning cloth 26 is provided with an escape port 21 corresponding to the inflation and deflation port 20. After adopting the above structure, the inflated supporting airbag 25 is stretched on the underside of the bottom plate of the ship, Prevent excessive upward bending of the bottom plate and ensure the flatness of the bottom plate. Regarding the connection relationship between the left and right sides of the bottom plate and the boat, referring to Figures 2 and 5, the connection part of the bottom cloth 24 and the air bag 5 is provided with a gap 27, and the left and right sides of the bottom plate are against the two left and right gaps 27. middle.

With regard to the folding structure of the bottom plate, referring to FIG. 4 , the bottom plate includes a plurality of bottom plate assemblies 1 that are connected together front and rear, and between two adjacent bottom plate assemblies 1 are arranged to allow the two bottom plate assemblies 1 to rotate relative to each other so that the bottom plate can be The hinge 2 in the folded state. The bottom plate of the ship is folded through the hinge parts 2 to realize the folding of the plurality of bottom plate assemblies 1, so as to facilitate the folding and storage of the bottom plate of the ship. When installing the bottom plate, the side that can be bent and folded should be installed upwards, that is, the bottom plate can only be bent upwards, not downwards.

Regarding the first embodiment of the hinged portion 2, referring to FIG. 7 and FIG. 8, the hinged portion 2 includes a chute 7 located on the rear side of the base plate assembly 1 and extending left and right. The chute 7 is in the shape of an arc. The upper part is provided with a limit block 9, and the lower side of the limit block 9 is provided with a downwardly opening card slot 10; In the chute 7 of the front-side bottom plate assembly 1, the lower side of the tab 8 has a circular arc surface that slides with the chute 7, the upper side of the tab 8 is fixed with a spherical crown turning tongue 11, and the top of the spherical crown turning tongue 11 is fixed. It leans against the card slot 10 and rotates with it. After adopting the above structure, the hinge portion 2 is arranged on the front and rear sides of the bottom plate assembly 1, and is an integral structure with the bottom plate assembly 1. To assemble the bottom plate of the ship, it is only necessary to insert the tab 8 and the spherical crown turning tongue 11 from the side of the chute 7. That is, the installation is convenient, and since the hinge portion 2 and the bottom plate assembly 1 are an integral structure, they can bear a large downward pressure, are solid and durable, and are not easily damaged.

Regarding the second embodiment of the hinge portion 2 , the hinge portion 2 includes a hinge installed between the front and rear bottom plate assemblies 1 , and the two fixed portions of the hinge are fixedly mounted on two adjacent bottom plate assemblies 1 respectively. After the above structure is adopted, the relative rotation of the two adjacent base plate assemblies 1 is realized through hinges, the hinge structure is adopted, and the cost is low, and the processing cost of the base plate assembly 1 is low. The second embodiment of the hinge portion 2 is not shown in the drawings Shows.

Regarding the specific structure of the limit block 9, referring to FIG. 9, the upper side of the limit block 9 is flush with the upper side of the bottom plate assembly 1, and the rear end of the limit block 9 is provided with a rounded transition 17 for avoiding the tab 8 , the inner surface of the card slot 10 is an arc surface that is compatible with the spherical crown turning tongue 11 . During the folding or flattening process of the bottom plate assembly 1 , the limiting block 9 is not in contact with the card slot 10 . In order to make the folding or flattening process of the bottom plate assembly 1 smoother, the circular arc surface of the tab 8 coincides with the outer spherical surface of the spherical crown turning tongue 11 , the inner surface of the clip slot 10 , and the arc surface of the chute 7 .

In order to ensure that the flat state and the folded state of the bottom plate are more stable, the front side of the bottom plate assembly 1 is provided with a folding limit surface 12 that is pressed against the upper side of the limit block 9 when the bottom plate assembly 1 is folded. The upper side of the tongue 8, the rear side of the bottom plate assembly 1 and the front side of the adjacent bottom plate assembly 1 on the rear side are provided with a flat limit surface 18 that presses against each other when the bottom plate is flat, and the flat limit surface 18 is located at the tab 8 the underside. After adopting the above structure, when the bottom plate is in a flat state, the flat limiting surfaces 18 of two adjacent bottom plate assemblies 1 are pressed against each other, which can prevent the bottom plate assembly 1 from continuing to fold backwards and ensure the stability of the bottom plate.

In order to reduce the weight of the bottom plate, referring to Figures 7 and 8 to facilitate the navigation of the inflatable boat 23, the bottom plate assembly 1 is provided with an inner cavity 13 penetrating left and right, and the left and right ends of the bottom plate assembly 1 are provided with protective plugs 14 to protect the The plug 14 is blocked on the chute 7 , and a fixed plug 15 is fixed on the side of the protective plug 14 close to the base plate assembly 1 , and the fixed plug 15 is inserted into the inner cavity 13 . After the above structure is adopted, the bottom plate assembly 1 is a hollow structure, which can greatly reduce the weight of the bottom plate of the ship and reduce the material cost of the bottom plate assembly 1; The side scratches the inflatable boat 23 , which plays a role of safety protection. In addition, since the protective plug 14 is blocked on the chute 7 , it can prevent the tab 8 from slipping out of the chute 7 and prevent the bottom plate assembly 1 from being separated and disassembled.

In order to facilitate the fixing of the bottom plate, referring to FIG. 1, the bottom plate assembly 1 at the rearmost end of the bottom plate is the positioning assembly 4, the positioning assembly 4 is folded upward, and the positioning assembly 4 and the stern plate 22 are provided with corresponding connecting holes 16, and the connecting holes 16 There is a bolt in the connecting hole 16 for fixing the connection between the positioning assembly 4 and the stern plate 22 . Before fixing the bottom plate of the ship, a mounting hole corresponding to the connecting hole 16 can be opened on the stern plate 22, or the bolt corresponding to the connecting hole 16 can be fixed on the stern plate 22, and the bolt can be passed through the connecting hole 16 and then fixed by nuts. Complete the installation of the bottom plate of the ship.

In conclusion, the present invention is not limited to the above-mentioned specific embodiments. Those skilled in the art can make several changes and modifications without departing from the spirit and scope of the present invention, and all these changes should fall within the protection scope of the present invention.

Claims (10)

1. A boat provided with a foldable bottom plate is characterized in that: the bottom of cabin is installed can tile, can carry out folding bottom plate (6) with the separation of ship after, and fixed cover (19) are installed to the front side in cabin, and the front side cartridge of bottom plate (6) is in fixed cover (19), and the downside of controlling two gasbags (5) is inserted respectively at the left and right sides both ends of bottom plate (6).

2. The boat with collapsible bottom panels as claimed in claim 1, wherein: the fixing sleeve (19) comprises tensioning cloth (26) fixedly arranged on the ship bottom cloth (24), two side edges and the rear edge of the tensioning cloth (26) are respectively and fixedly connected with the ship bottom cloth (24), and the tensioning cloth (26) and the ship bottom cloth (24) form the fixing sleeve (19) which is open backwards.

3. A boat incorporating a collapsible floor as claimed in claim 2, wherein: the upper side of the ship bottom cloth (24) is fixedly provided with a supporting air bag (25), the supporting air bag (25) extends from the front side of the cabin to the rear side of the cabin, the upper side of the supporting air bag (25) abuts against the bottom of the bottom plate (6), and the supporting air bag (25) is provided with an air inflation and deflation port (20).

4. A boat incorporating a collapsible floor as claimed in claim 3 wherein: the connecting part of the ship bottom cloth (24) and the air bag (5) is provided with a crack (27), and the left side and the right side of the bottom board (6) are propped against the left crack and the right crack (27).

5. A boat incorporating a collapsible floor as claimed in claim 4 wherein: the bottom board (6) comprises a plurality of bottom board assemblies (1) which are connected together in a front-back mode, and a hinge portion (2) which can enable the two bottom board assemblies (1) to rotate relatively to enable the bottom board (6) to be in a folded state is arranged between every two adjacent bottom board assemblies (1).

6. The foldable boat floor of claim 5, wherein: the hinge part (2) comprises a sliding groove (7) which is positioned on the rear side surface of the bottom plate component (1) and extends left and right, the sliding groove (7) is arc-shaped, a limiting block (9) is arranged above the sliding groove (7), and a clamping groove (10) with a downward opening is formed in the lower side of the limiting block (9); the hinge part (2) further comprises a clamping tongue (8) fixedly arranged on the front side of the bottom plate component (1), the clamping tongue (8) is clamped in a sliding groove (7) of the adjacent front side bottom plate component (1), the lower side of the clamping tongue (8) is provided with an arc surface in sliding fit with the sliding groove (7), a spherical crown rotating tongue (11) is fixedly arranged on the upper side of the clamping tongue (8), and the spherical crown rotating tongue (11) abuts against the clamping groove (10) and is in rotating fit with the clamping groove.

7. The foldable boat floor of claim 5, wherein: the hinge parts (2) comprise hinges arranged between the front bottom plate assembly and the rear bottom plate assembly (1), and two fixing parts of the hinges are fixedly arranged on the two adjacent bottom plate assemblies (1) respectively.

8. The foldable boat floor of claim 6, wherein: the side of going up of stopper (9) and the side of going up of bottom plate subassembly (1) parallel and level, the rear end of stopper (9) is equipped with fillet transition (17) that are used for dodging block tongue (8), and the medial surface of draw-in groove (10) is the arc surface that suits with spherical crown commentaries on classics tongue (11), and the arc surface of block tongue (8) and the spherical crown commentaries on classics outer sphere of tongue (11), the medial surface of draw-in groove (10), the arcwall face centre of a circle coincidence of spout (7).

9. The foldable boat floor of claim 8, wherein: the front side of bottom plate subassembly (1) is equipped with presses folding spacing face (12) of stopper (9) upside when bottom plate subassembly (1) is folding, folding spacing face (12) are located the upside of block tongue (8), the rear side of bottom plate subassembly (1) all is equipped with flat spacing face (18) that press each other when ship bottom plate (3) flat exhibition with the front side of the adjacent bottom plate subassembly (1) in rear side, flat spacing face (18) that lie in block tongue (8) of flat exhibition, inner chamber (13) that run through about bottom plate subassembly (1) inside is equipped with, both ends are equipped with about bottom plate subassembly (1) and protect stopper (14), protect stopper (14) shutoff on spout (7), it has fixed stopper (15) to protect one side that stopper (14) are close to bottom plate subassembly (1), fixed stopper (15) cartridge is in inner chamber (13).

10. A foldable boat floor as recited in any one of claims 1 to 9, wherein: be located bottom plate subassembly (1) of bilge floor (3) last end and be locating component (4), locating component (4) turn over the book that turns up, locating component (4) and transom (22) set up connecting hole (16) that correspond each other, and connecting hole (16) have been seted up individual, and the bolt with locating component (4) and transom (22) fixed connection is inserted in connecting hole (16).

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