JPH0326075Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention relates to a bottom cap of a connecting pipe used to connect a sail mast to a sailing board.

[Problem that the idea aims to solve]

Conventionally, the sail mast was connected to the board on the beach using an extension joint pipe (hereinafter referred to as the connecting pipe), which was used to attach the bottom part to the sail board and to insert and connect the mast. Sand adheres to the bottom of the connecting pipe because it is being prepared for connection on a sandy beach. When the bottom of the connecting pipe with this sand adhered to it is fitted into the base cup of the board, the sand interlocking between them causes abrasion and looseness, resulting in defects. The work was quite troublesome because the bottom part had a transparent mounting hole, and the connecting fittings (cleats) of the sail tensioning strings or their mounting screws protruded.

[Means to solve the problem]

Therefore, the present invention provides a cap that can be fitted to the bottom of the connecting pipe to prevent sand from entering and adhering to the inner bottom. For this reason, the present invention is designed to fit into the bottom of the connecting pipe that is interposed when connecting the sail mast to the board, and the blocking plate that closes the opening bottom of the connecting pipe has a transparent hole installed at the bottom of the side of the pipe. A protruding side wall portion is provided to close the attached mounting hole, and an escape hole is formed in the side wall portion to avoid interference with protruding members such as the sail tensioning string connection fittings provided at the bottom of the pipe and their fasteners. It consists of what was done.

[Effect]

By fitting to the bottom of the connecting pipe, the closing plate part closes the opening bottom of the connecting pipe, and the side wall part closes the mounting hole cut through the lower part of the side of the pipe, and the sail tensioning string connecting fitting The protruding members such as the fasteners and the like are accommodated in the relief space of the side wall.

[Embodiment 1] Details of the present invention will be explained below with reference to illustrated embodiments. The bottom cap S of this example shown in FIG. 1 is fitted to the bottom of the connecting pipe K shown in FIG. A side wall tube 2 having an inner diameter equal to the outer diameter of the connecting pipe K is protruded from the outer periphery of the plate portion 1 and has an open upper end. Further, the side wall cylinder 2 has an escape space 2a cut out from the upper end to the lower part, and an arrangement groove 1a is provided around the inner circumferential end of the side wall cylinder 2 in the closing plate part 1. Therefore, as shown in Fig. 3, fit the bottom cap S from the bottom of the connecting pipe K by aligning the relief cavity 2a with the base of the connecting fitting Kb of the sail tensioning string protruding from the connecting fitting Kb. It is sufficient that the end portion of the cap is placed in the arrangement groove 1a, so that the opening bottom Ka is closed with the closing plate portion 1, and the opposing pin hole Kc for attaching the base cup, which is provided through the side wall tube 2, is closed with the closing plate portion 1. It will be blocked. Therefore, since the bottom cap S can prevent sand from entering, the connection work can be carried out smoothly without having to remove sand from the connection pipes K on a sandy beach. The side wall tube only needs to have a height that allows the pin hole Kc to fit therein, and the side wall tube other than the portion that closes the pin hole may be cut out as shown in FIG. 4.

[Example 2] Next, the bottom cap 3 shown in Fig. 5 is a connecting pipe K.
A side wall cylinder 3b whose outer diameter is the same as the inner diameter of the connecting pipe K is connected to a closing plate part 3a that closes the opening bottom Ka of the connecting pipe K at the bottom end. 3b has an escape space 3c cut out from the upper end. Note that the upper part of the side wall tube 3b is narrowed inward to facilitate insertion. Its use is for mounting the sail tensioning string connecting fitting Kb that protrudes from the inner periphery of the bottom of the connecting pipe K.
The bottom cap 3 may be provided by aligning the relief space 3c with Kd and inserting it from the bottom of the connecting pipe K (sixth
(see figure). As a result, the opening bottom Ka of the connecting pipe K is closed by the closing plate part 3a, and the pin hole Kc is closed by the side wall cylinder 3b that is in close contact with the inner periphery of the pin hole Kc, thereby preventing sand from entering the inside. . This example is not limited to the present invention configured as described above. For example, the bottom of the opening of the connecting pipe need not be closed by the opening, but may be closed by a bottom cap 4 having a closing plate 4a disposed at the upper end as shown in FIGS. 7 and 8. Further, the shape of the relief space is also suitable, and in addition to the shape of a notch hole, the relief space 4b may be shaped like a groove as shown in FIG. Furthermore, as shown in FIG. 9, a string 6 is tied to the closing plate 5a of the flexible bottom cap 5 to be fitted onto the inner periphery of the connecting pipe K, and the cap 5 is pushed into the connecting pipe K when connecting. In this state, it is connected to the base cup 7 fixed to the board side to provide a mast in the conventional manner, and when removed, the string 6 can be pulled and returned to the bottom of the connecting pipe K. According to this, there is no need for a place to put the bottom cap 5 when connecting, and it will not be lost. Note that the shape and number of the relief cavities formed in the side wall portion are not limited either, and the type of the protrusion member is not limited as long as they are formed in accordance with the protrusion member of the bottom portion into which the connecting pipe is to be fitted. Further, the side wall portion of the bottom cap fitted onto the inner periphery of the connecting pipe may not be cylindrical but may be solid.

[Effect of the idea]

Therefore, according to the present invention, since sand does not adhere to the inner periphery of the bottom of the connecting pipe, the mast connecting work on a sandy beach can be carried out smoothly, which is very effective, and there is no need for the conventional troublesome cleaning of sand from the connecting pipe. Moreover, there is no possibility that the joints will be worn out by the sand that meshes with them during the connection, causing play in the joints.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figure is a front view of the connecting pipe, Figure 3 is a partially sectional front view with the bottom cap fitted, Figure 4 is a perspective view of a modified example of the bottom cap, and Figure 5 is a perspective view of another example. , Fig. 6 is a vertical cross-sectional view of its usage state, Fig. 7
The figure is a partially cutaway perspective view of another example, FIG. 8 is a longitudinal sectional view of the bottom cap in its use state, and FIG. 9 is a longitudinal sectional view of the bottom cap in a pushed-in state, which can be pulled out by tying a string. S, 3, 4, 5...bottom cap, 1, 3a, 4
a, 5a...Closing plate portion, 2, 3b...Side wall cylinder, 2
a, 3c, 4b...Evacuation space, 6...String body, 7...
...Base cup, K...Connection pipe, Ka...Open bottom, Kb...Connection fittings for sail tension string, Kc...
Pin hole, Kd...screw.

Claims (1)

[Claims for Utility Model Registration] (1) This is a device that fits into the bottom of a connecting pipe that is interposed when connecting a sail mast to a board, and the side surface of the pipe is attached to the closing plate that closes the bottom of the opening of the connecting pipe. At the bottom of the pipe, a side wall part is provided to cover the transparent mounting hole, and a side wall part is provided that protrudes from the bottom of the pipe to avoid interference with the connecting fittings for the sail tension string and its fasteners, etc. provided at the bottom of the pipe. A bottom cap for sand prevention of a mast connecting pipe in a sailing board, the bottom cap being formed on the side wall. (2) The bottom cap for sand prevention according to claim 1 of the utility model registration claim, wherein the side wall portion is provided protruding from the outer periphery of the closing plate portion so as to be able to fit onto the outer periphery of the bottom of the pipe. (3) The bottom cap for sand protection according to claim 1, which has a side wall projecting from the closing plate so that it can be closely fitted to the inner periphery of the bottom of the pipe.