JP5577143B2 - Air floor and manufacturing method thereof - Google Patents

Description

  The present invention relates to an air floor provided at the bottom of a boat and a method for manufacturing the same.

  As a small boat used for leisure or the like, there is an inflatable boat that is used by being filled with air. In addition, as a floor member installed at the bottom of an inflatable boat, an air floor that is used by being filled with air has been proposed (see, for example, Patent Document 1). By adopting such an air floor, large buoyancy can be ensured, so that the safety of the inflatable boat can be improved. In addition, since the assembly work is completed only by filling the air in the air floor, it is easier to handle than the conventional assembly type floor member.

JP 2002-96792 A

  By the way, in order to improve the navigation performance of the inflatable boat, it is important to make the bottom of the boat protrude in a V shape. Therefore, in the air floor described in Patent Document 1, the cross-sectional shape is formed in a V shape by joining two air mats. However, preparing two air mats and joining the air mats at a predetermined angle has been a factor in increasing the manufacturing cost of the air floor.

  An object of the present invention is to reduce the manufacturing cost of an air floor.

Eafuroa of the present invention is a Eafuroa provided over the bottom of the boat, has a floor body and a top sheet and bottom sheet to be connected by multiple threads with opposite at a predetermined distance, said upper sheet And the lower surface sheet are stitched together to form a close contact portion in the floor main body, and the floor main body is bent at the close contact portion. To do.

  The air floor of the present invention is characterized in that a belt-like sheet covering the contact portion is attached to the upper surface sheet, and the belt-like sheet is held in a state where the upper surface sheet is brought close to the contact portion side.

An air floor manufacturing method according to the present invention is an air floor manufacturing method provided at the bottom of a boat, wherein the floor main body includes an upper surface sheet and a lower surface sheet that are opposed to each other with a predetermined interval and are connected by a plurality of yarns. Preparing an adhesive portion for linearly adhering the upper surface sheet and the lower surface sheet by stitching the upper surface sheet and the lower surface sheet under a state where gas is discharged from the inside of the floor main body. Forming on the floor main body and affixing a belt-like sheet covering the contact portion to the upper surface sheet while bringing the upper surface sheet to the contact portion side under a state where gas is discharged from the inside of the floor main body. Features.

  According to the present invention, the close contact portion that linearly contacts the upper surface sheet and the lower surface sheet is formed on the floor main body, and the floor main body is bent at the close contact portion. Thereby, the number of parts of the air floor having a V-shaped cross-sectional shape can be reduced, and the manufacturing cost of the air floor can be reduced.

It is a perspective view which shows the inflatable boat provided with the air floor which is one embodiment of this invention. It is a top view which shows an inflatable boat from upper direction. It is sectional drawing which shows an inflatable boat along the AA line of FIG. FIG. 3 is an exploded cross-sectional view showing the inflatable boat along the line AA in FIG. 2. (a) is a front view showing an air floor, (b) is a rear view showing the air floor, (c) is a left side view showing the air floor, and (d) is a right side view showing the air floor. (a) is a top view which shows an air floor, (b) is a bottom view which shows an air floor. (a) is an expanded sectional view which shows an air floor along the AA line of FIG.5 (c), (b) is an expanded sectional view which shows an airfloor along the BB line of FIG.5 (c). is there. (a)-(f) is explanatory drawing which shows the manufacturing process of an air floor. It is explanatory drawing which shows the contact | adherence part formed in a floor main body. (a) And (b) is explanatory drawing which shows the floor main body which comprises the air floor which is other embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing an inflatable boat 11 having an air floor 10 according to an embodiment of the present invention. FIG. 2 is a plan view showing the inflatable boat 11 from above. As shown in FIGS. 1 and 2, the inflatable boat 11 has a boat body 14 including a starboard tube 12 and a port tube 13. Further, the starboard tube 12 and the port tube 13 are connected via a bow tube 15 in the bow portion 14 a of the boat body 14. Further, the starboard tube 12 and the port tube 13 are connected via a transom plate 16 in the stern portion 14 b of the boat body 14. An outboard motor 17 is attached to the transom plate 16.

  The starboard tube 12, the port tube 13 and the bow tube 15 constituting the boat body 14 are formed by using a boat cross in which a base fabric such as polyester or nylon is sandwiched between polymer layers. Since the hull shape of the inflatable boat 11 is determined by the tube rigidity, for example, a boat cross corresponding to a tube internal pressure of 20 to 25 kPa is used. Moreover, a partition is provided in the starboard tube 12 and the port tube 13, and even if the boat cross is damaged, all the air (gas) filled in the tubes 12, 13, and 15 should be used. It is configured not to come off.

  FIG. 3 is a sectional view showing the inflatable boat 11 along the line AA in FIG. FIG. 4 is an exploded cross-sectional view showing the inflatable boat 11 along the line AA in FIG. As shown in FIGS. 3 and 4, a bottom sheet 20 is bonded to the bottom of each of the tubes 12, 13, 15 and the transom plate 16 so as to close the bottom 14 c of the boat body 14. In addition, an air floor 10 according to an embodiment of the present invention is accommodated in the bottom 14c of the boat body 14.

  5 (a) is a front view showing the air floor 10, FIG. 5 (b) is a rear view showing the air floor 10, and FIG. 5 (c) is a left side view showing the air floor 10. 5 (d) is a right side view showing the air floor 10. FIG. 6A is a plan view showing the air floor 10, and FIG. 6B is a bottom view showing the air floor 10. 7A is an enlarged sectional view showing the air floor 10 along the line AA in FIG. 5C, and FIG. 7B is along the line BB in FIG. 5C. 1 is an enlarged cross-sectional view showing an air floor 10. FIG. In FIGS. 7A and 7B, the internal structure is omitted. As shown in FIGS. 3 to 7, the tip of the air floor 10 located on the bow side is formed so as to be gradually narrowed and lifted upward. The cross-sectional shape of the air floor 10 is formed in a V shape from the front end portion to the rear end portion. Thus, by assembling the air floor 10 having a V-shaped cross-section, the bottom of the inflatable boat 11 can be protruded in a V-shape, and the wave surpassing performance of the inflatable boat 11 can be improved.

  Hereinafter, a method for manufacturing the air floor 10 having a V-shaped cross section will be described. FIGS. 8A to 8F are explanatory views showing the manufacturing process of the air floor 10. First, as shown in FIG. 8A, when the air floor 10 having a V-shaped cross section is manufactured, a floor body 23 having a flat cross section is prepared. The floor main body 23 includes a pair of an upper surface sheet 24 and a lower surface sheet 25 that are opposed to each other with a predetermined interval, and a side sheet 26 is bonded to the edge of the upper surface sheet 24 and the lower surface sheet 25. A large number of connecting yarns (threads) 27 are provided in the floor body 23, one end of the connecting yarn 27 is connected to the upper surface sheet 24, and the other end of the connecting yarn 27 is connected to the lower surface sheet 25. . That is, the interval between the upper surface sheet 24 and the lower surface sheet 25 is regulated by a large number of connecting yarns 27, and the floor body 23 can be expanded into a flat plate shape by filling with air (gas). Each of the sheets 20, 24 to 26 is formed using the above-described boat cloth or the like, and the connecting yarn 27 is formed using polyester, nylon, or the like.

  Subsequently, as shown in FIG. 8B, the floor main body 23 is deformed into a crushed state by discharging air from the inside of the floor main body 23. Then, as shown in FIG. 8 (c), the floor main body 23 is sewn using a sewing machine (not shown), whereby the contact portion 30 in which the upper surface sheet 24 and the lower surface sheet 25 are in close contact with each other in the center in the width direction of the floor main body 23. Form. Here, FIG. 9 is an explanatory view showing the close contact portions 30, 31, 32 formed on the floor body 23. As shown by a broken line in FIG. 9, a close contact portion 30 that extends linearly is formed at the rear end portion of the floor main body 23, and a close contact portion 31 that extends in a curved manner by being divided into two branches at the front end portion of the floor main body 23. , 32 are formed. As described above, the close contact portions 30, 31, and 32 are formed by sewing the upper surface sheet 24 and the lower surface sheet 25, but a large number of connecting threads 27 are provided between the upper surface sheet 24 and the lower surface sheet 25. Therefore, the upper surface sheet 24 and the lower surface sheet 25 are in close contact with each other with the connecting thread 27 interposed therebetween. The sewing thread 33 used when sewing the close contact portions 30, 31, 32 is formed using polyester, nylon, or the like.

  When the close contact portion 30 is formed on the floor main body 23, as shown by an arrow α in FIG. 8D, the close contact portion 30 as shown by an arrow β while pulling the top sheet 24 toward the close contact portion 30 side. A belt-like sheet 34 is attached to the upper surface sheet 24 so as to cover the upper surface sheet 24. Further, as indicated by an arrow γ in FIG. 8D, the belt-like sheet 34 is attached to the lower surface sheet 25 so as to cover the close contact portion 30. Thus, as shown in FIG. 8 (e), since the contact portion 30 is covered with the belt-like sheet 34, the through hole of the contact portion 30 formed by the sewing needle during sewing can be closed, and the floor body It becomes possible to prevent the air leakage from 23. Further, as shown in FIG. 8E, the belt-like sheet 34 attached to the upper surface sheet 24 holds the upper surface sheet 24 in a state where the upper surface sheet 24 is drawn toward the contact portion 30 side. Thereby, since the upper surface sheet 24 is drawn closer to the close contact portion 30 side than the lower surface sheet 25, as shown in FIG. 8 (f), the floor body 23 is bent with the close contact portion 30 as a boundary, as shown in FIG. The air floor 10 having a V-shaped cross section is completed. When used as the air floor 10, the air floor 10 is filled with air at a pressure of, for example, 50 kPa.

  As shown in FIGS. 5 (a) to 5 (d), the rear end of the air floor 10 is formed to be substantially horizontal. Therefore, as shown in FIG. 7 (a), the rear end of the air floor 10 is formed. One contact part 30 is provided in the part. On the other hand, as shown in FIGS. 5A to 5D, the tip of the air floor 10 is formed so as to be lifted upward, so that the tip of the air floor 10 is formed as shown in FIG. Is provided with two contact portions 31 and 32. That is, as shown in FIG. 9, when the two contact portions 31 and 32 that are gradually separated toward the tip of the floor body 23 are formed, as shown in FIG. The belt-like sheet 34 is affixed to the upper surface sheet 24 and the lower surface sheet 25 so as to cover the close contact portions 31 and 32 while pulling the upper surface sheet 24 and the lower surface sheet 25 so as to approach each other. Thereby, even when the flat floor main body 23 is used, it is possible to form the air floor 10 in which the tip portion warps while forming a V-shaped cross section.

  As described so far, the close contact portions 30, 31, 32 are formed by sewing the floor main body 23, and the floor main body 23 is bent with the close contact portions 30, 31, 32 as a boundary. The air floor 10 having a letter shape can be easily manufactured. Further, when the floor main body 23 is sewn or when the belt-like sheet 34 is attached to the floor main body 23, the air is exhausted from the floor main body 23 so that the floor main body 23 is crushed. It becomes possible to do. Furthermore, since the V-shaped air floor 10 is formed by processing the flat floor main body 23, the number of parts and processing steps of the air floor 10 can be reduced, and the cost of the air floor 10 can be reduced. It becomes. Furthermore, when the flat air floor and the V-shaped air floor 10 are set as products, the flat air floor can be used as the work in-process floor body 23, so that the air floor material can be shared. Further cost reduction of the air floor 10 can be achieved.

  In addition, as shown by the symbol α in FIG. 9, the close contact portion 30 formed on the floor main body 23 is processed so as to be interrupted at the rear end portion of the floor main body 23. As a result, even if the close contact portions 30, 31, 32 are provided on the air floor 10, the inside of the air floor 10 is not divided by the close contact portions 30, 31, 32. The whole can be filled with air. That is, since it is not necessary to form a plurality of filling ports 35 for the air floor 10, the manufacturing cost of the air floor 10 can be reduced. Note that, as described above, from the viewpoint of manufacturing cost of the air floor 10 and workability when filling with air, the contact portions 30, 31, 32 may be formed so as not to divide the inside of the air floor 10. Although it is desirable, it goes without saying that the close contact portion may be formed so as to divide the inside of the air floor 10.

  Further, in the case shown in FIG. 9, the close contact portions 31 and 32 are formed so as to be divided into two forks to the front end portion of the floor body 23, but the close contact portions 30, 31 and 32 are limited to the shape shown in the figure. It will never be done. Here, FIGS. 10 (a) and 10 (b) are explanatory views showing floor bodies 40 and 41 constituting an air floor according to another embodiment of the present invention. 10 (a) and 10 (b), members similar to those shown in FIG. 9 are given the same reference numerals and description thereof is omitted. As shown in FIG. 10A, a close contact portion 42 extending linearly in the longitudinal direction of the floor body 40 may be formed. Further, as shown in FIG. 10 (b), close contact portions 31, 32 that are divided into two portions may be formed only at the front end portion of the floor body 41.

  It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the above description, the air floor 10 is provided so as to be detachable with respect to the boat body 14. However, the structure is not limited to this, and even if the air floor 10 is fixed to the boat body 14 by bonding or the like. good. In the illustrated case, the upper sheet 24 and the lower sheet 25 are stitched together to form the contact portions 30, 31, 32, 42. However, the present invention is not limited to this, and the floor bodies 23, 40, 41 are not limited thereto. By applying a heat sealing process to the upper surface sheet 24, the upper surface sheet 24 and the lower surface sheet 25 may be fused to form the contact portions 30, 31, 32, 42. Further, in the illustrated case, the inflatable boat 11 including the transom plate 16 is illustrated, but the present invention is not limited to this, and the present invention is applied to an inflatable boat in which the entire circumference of the boat is surrounded by a tube. Needless to say, the air floor 10 may be applied.

10 Air Floor 11 Inflatable Boat (Boat)
14c Ship bottom 23 Floor body 24 Upper surface sheet 25 Lower surface sheet 27 Connecting thread (thread)
30, 31, 32 Adhering portion 34 Strip sheet 40, 41 Floor main body 42 Adhering portion

Claims (3)

An air floor provided at the bottom of the boat,
It has a floor body provided with an upper surface sheet and a lower surface sheet that are opposed to each other with a predetermined interval and are connected by a large number of yarns,
Forming a close contact portion in the floor main body to linearly adhere the upper surface sheet and the lower surface sheet by sewing the upper surface sheet and the lower surface sheet,
The air floor according to claim 1, wherein the floor body is bent at the contact portion. In the air floor according to claim 1 ,
An air floor, wherein a belt-like sheet covering the contact portion is attached to the upper surface sheet, and the belt-like sheet is held in a state where the upper surface sheet is brought close to the contact portion side. A method of manufacturing an air floor provided at the bottom of a boat,
Preparing a floor body provided with an upper surface sheet and a lower surface sheet which are opposed to each other with a predetermined interval and connected by a large number of yarns;
Under the state where gas is discharged from the inside of the floor main body, the floor main body has a close contact portion that linearly contacts the upper surface sheet and the lower surface sheet by sewing the upper surface sheet and the lower surface sheet. Forming,
Manufacturing an air floor, wherein a belt-like sheet covering the contact portion is attached to the upper surface sheet while the upper surface sheet is brought closer to the contact portion side in a state where gas is discharged from the inside of the floor main body. Method.

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