JPH042676Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to pneumatic boats such as water boats and snow boats.

[Conventional technology]

Conventionally, this type of pneumatic boat has been constructed such that the base end of a string functioning as a puller is fixed to the front part of the boat body, as shown in FIG.

[Problem that the invention attempts to solve]

In this structure, the traction force applied to the puller is applied to the front part of the boat body, and the middle and rear parts of the boat body, where the load is mainly applied, follow suit. A force in the opposite direction will try to stretch the same part between the two parts, and this can cause wear and tear on the boat body. It is necessary to use expensive materials, and it is necessary to attach a separate member to the underside of the boat body to obtain gliding ridges that also serve as stability in the direction of travel, making the structure cumbersome. When traveling while towing a vehicle, there were problems such as the tail end swinging around the attachment point of the puller, and stability was not necessarily good.

[Means for solving problems]

This invention is designed to expand and contract by supplying and discharging air, and is designed to expand and contract by introducing and discharging air. A pipe-shaped part constructed by abutting strip-shaped pieces and fixing both side edges of these strip-shaped pieces to the boat body, and a pipe-shaped part that is inserted through the pipe-shaped part and whose rear end portion is provided on the tail end surface of the boat body. A string body is attached to the stern end surface of the boat through a string ring, and the front end portion extends forward of the boat body to form a puller; The above-mentioned problem is attempted to be solved by providing sliding property enhancing ridges which are formed by being inserted into the pipe-shaped part and which also serve to stabilize the moving direction.

〔Example〕

The embodiment shown in the figure includes a large-diameter central hollow body 3 and left and right hollow bodies 4, 4', which have a rocket shape by welding the front edges of an upper plate 1 made of a thermoplastic soft synthetic resin sheet and a lower plate 2 made of the same. The central hollow body 3 and the left and right hollow bodies 4, 4' are equipped with supply and exhaust plugs 5, 6,
6' to make it expandable and contractible, and the left and right hollow bodies 4, 4' are fixed to both sides of the central hollow body 3 to form the boat body 7, and the upper surface of the intermediate and rear parts of the central hollow body 3 is heated. Front and rear seat plates 8, 8' made of plastic soft synthetic resin sheets are laid down, and the front position of the front seat plate 8, the front position of the rear seat plate 8, and the central hollow body 3 are installed.
A pair of connecting rings 10, 1 are located at the lower side of the tail end surface 9 of the
A short string 12 with tube 11 wrapped around it through 0'
The two ends of the central hollow body 3 are connected to each other, and the lock strings 13 are attached to the upper surface of the front part. Strips 15, 15' made of a thermoplastic soft synthetic resin sheet with a length reaching from the front end to the rear end of the central hollow body 3 are brought into contact with the points on the line.
By welding both side edges of 5' to the central hollow body 3, pipe-shaped parts 16, 16' are formed, and by inserting the string 17 into the pipe-shaped parts 16, 16', the boat main body is formed. 1. Slideability enhancing ridges 23, 23' which also serve as stability in the direction of movement are formed on the lower surface of the string 17, and the rear end portion 18 of the string 17 is connected to a string loop attached to the tail end surface 9 of the central hollow body 3 on the same surface. 19, and the front end portion 20 extends through a string ring 21 attached to the lower surface of the front portion of the central hollow body 3, and has a ring-shaped handle 22.
was formed.

[Functions and effects of composition]

Since the present invention has the above-mentioned structure, the pulling force applied to the puller is concentrated on the tail end surface of the central hollow body, so it is a so-called backward push type, and unlike the conventional one described above, it does not have a stretching effect. It does not have a place that receives force, and the pipe-like part and the string form ridges on the bottom surface of the boat body that enhance sliding properties, which also serve as stability in the direction of travel. There is no need to add a special mechanism using a separate member to provide this function,
In addition, since it is a backward pushing type and the string is pulled out forward by a pipe-shaped part to form a puller, the tail end does not swing when towing the puller and is stable. It also has various benefits, such as being good and having little risk.

[Brief explanation of drawings]

The figures show an embodiment of the pneumatic boat of the present invention, in which Fig. 1 is a perspective view of the whole as seen from above, Fig. 2 is a perspective view of the same as seen from below, and Fig. 3 is a rear view. , FIG. 4 is a sectional view taken along line A-A in FIG. 1, FIG. 5 is a sectional view taken along line A'-A' in FIG. 1,
FIG. 6 is a sectional view showing a conventional one. 1...Top plate, 2...Bottom plate, 3...Central hollow body, 4, 4'...Hollow bodies on both left and right sides, 5, 6, 6'...
...Feeding and exhaust plug, 7...Boat body, 8, 8'... Seat plate, 9... Tail end surface, 10, 10'... Connection ring, 1
1...Tube, 12...Short string, 13...Lock string, 14...Lock member, 15, 15'...Strip piece, 16, 16'...Pipe-shaped portion, 17...String body, 18... ...Rear end portion, 19... String ring, 20...
...front end part, 21... string loop, 22... puller,
23, 23'...Slide enhancing ridges that also serve as stability in the direction of travel.

Claims (1)

[Scope of utility model registration request] A strip of length reaching from the front end to the rear end of the boat body is installed on the lower surface of the body of the pneumatic boat, which is configured to expand and contract when air is introduced and discharged, along multiple long lines from front to back. A pipe-shaped part formed by fixing both side edges of these band-shaped pieces to the boat body by abutting them, and a string that is inserted through the pipe-shaped part and whose rear end portion is provided on the tail end surface of the boat body. A string is attached to the stern end surface through a loop, and the front end portion extends forward of the boat body to form a puller, and this string is connected to a pipe-shaped section. 1. A pneumatic boat, characterized in that the pneumatic boat is provided with sliding property enhancing ridges which are formed by inserting the ridges into the boat and which also serve as stability in the traveling direction.