JPS6115148Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a bottom cover that closes the open end of the base of a concrete utility pole.

When constructing concrete utility poles, if earth and sand enters the pole through the open end (main entrance) of the base, which is buried in the soil, the pole may sink or tilt. To prevent this from happening, we have traditionally covered the base with a bottom cover. By the way, this bottom cover is required to be strong enough to withstand earth pressure, so conventionally it was made of concrete blocks and joined to the base of the utility pole using a bonding material such as mortar. However, such a bottom cover made of concrete block is a heavy object, so it takes time to manufacture the bottom cover itself and to connect it to the base of a concrete utility pole. There were problems such as the product sometimes falling off.

In view of these conventional drawbacks, the present invention aims to improve the work of joining to concrete utility poles by reducing the weight of the bottom cover itself, and to prevent it from falling off after joining.It also reduces costs by reducing the weight of the bottom cover itself and improving productivity. In order to achieve this purpose, the bottom cover of the present invention has a donut-shaped outer member that can be divided into two semicircular halves of the same shape, and a Disc-shaped inner members with outer diameters matching the inner diameter of the outer member are each molded from plastic, and each of the half bodies has an inner wall erected on the inner periphery and a wall facing downward on the inner circumferential surface of the inner wall. A hook-shaped inward engaging piece is extended, an outer wall is provided on the outer peripheral edge, and an intermediate wall is provided concentrically between the outer wall and the inner wall, and the outer wall and the intermediate wall are provided with an outer wall. A part for pouring a bonding material such as mortar is formed in a circumferential manner, and further end walls are extended on each end edge, and one end wall is provided with a downward hook-shaped horizontal engagement piece that fits into the other end wall. The inner member is characterized in that an outer wall is provided on the periphery of the inner member to fit into the inward engaging piece.

An embodiment of the present invention will be described below with reference to the drawings. The bottom cover 1 of the present invention includes a donut-shaped outer member 3 that can be divided into two halves 3a and 3b each having the same semicircular arc shape, and a disc whose outer diameter matches the inner diameter of the outer member 3. Each of the half bodies 3a, 3b and the inner member 2 are molded from plastic. Each of the half bodies 3c, 3b has an inner wall 8 along the inner peripheral edge, an outer wall 10 and an intermediate wall 11 concentrically arranged between the outer peripheral edge, and end walls 14 at both ends. ,14′
between the inner wall 8 and the intermediate wall 11, and the intermediate wall 1
An appropriate number of ribs 13 are installed between each of the ribs 1 and the outer wall 10 for reinforcement. A downward hook-shaped inward engaging piece 9 is provided extending along the inner peripheral edge of the inner wall 8, and a plurality of notch grooves 12 are provided at appropriate intervals in the inward engaging piece 9, and the outer edge of the end wall 14 is provided with a plurality of cutout grooves 12 at appropriate intervals. Also, a downward hook-shaped horizontal engagement piece 15 is provided, and the other end wall 1 is provided on the extension of the intermediate wall 11 of the horizontal engagement piece 15.
Notch groove 16 into which the edge of intermediate wall 11 on the 4' side is fitted
will be established.

On the other hand, the inner member 2 has a drain hole 4 in the center, and an inner wall 5 is provided upright around the periphery of the drain hole 4, and is fitted into the inward engaging piece 9 of the outer member 13 along the outer periphery. An outer wall 7 is provided upright, and an appropriate number of ribs 6 are provided radially between the outer wall 7 and the inner wall 5, and the intersection of each rib 6 with the outer wall 7 fits into the notched groove 12. It is slightly taller than the outer wall 7.

Therefore, the bottom cover 1 of the present invention has half bodies 3a and 3b.
are opposed so that one end wall 14 and the other end wall 14' face each other, and the end wall 14' of the half body 3b is attached to the horizontal engagement piece 15 of the half body 3a.
The end wall 14' of the half body 3a is attached to the horizontal engaging piece 15 of b.
Then, the intermediate wall 11 is fitted into the notch groove 16, respectively, and the external member 3 is assembled. After that, the inner member 2 is placed inside the outer member 3, and the outer wall 7 is attached to both halves 3.
The ribs 6 are fitted into the inward engaging pieces 9, 9 of a and 3b, and the ribs 6 are fitted into the notched grooves 12, thereby assembling them integrally.

Fig. 7 shows an example of the use of the bottom cover 1 assembled integrally in this way, and in the figure A shows the concrete body of the utility pole, and B shows the direction in the longitudinal direction and concentrically with the concrete body A of the utility pole. The lower end of the reinforcing bar B is made to protrude from the base opening C.

Then, in the bottom cover 1, a concavity formed in an annular manner between the outer wall 10 and the intermediate wall 11 of the external member 3 is filled with a bonding material D such as mortar, and applied to the base opening C of the concrete body A. The reinforcing bars B protruding from the base opening C are embedded in the bonding material D and fixed.

However, since the bottom cover according to the present invention is molded from plastic and is bonded to the base of a concrete utility pole by pouring mortar into the circumferential groove between the intermediate wall and the outer wall of the external material, The weight of the bottom cover itself can be reduced, reducing the labor involved in joining it to the utility pole, and the bottom cover is less likely to separate from the utility pole due to its own weight after being joined. In addition, not only is the productivity of the bottom cover itself good because it is made of plastic, but the outer material is formed from two halves of the same shape, and the two halves and the inner material can be molded separately. Therefore, the mold can be made smaller and the production cost can be further reduced, which has great economic merit.

Furthermore, by integrating each half body and the internal member by appropriate fitting means, it also has impact resistance and pressure resistance, which is extremely useful in practice.

[Brief explanation of the drawing]

The figures relate to one embodiment of the present invention; Fig. 1 is an exploded perspective view, Fig. 2 is a plan view, Fig. 3 is a bottom view,
Figure 4 is a sectional view taken along line A-A in Figure 2, and Figure 5 is a cross-sectional view of Figure 2.
6 is a sectional view taken along line C--C in FIG. 2, and FIG. 7 is a sectional view taken along line C--C in FIG. 2. FIG. 1... Bottom cover, 2... Internal material, 3... External material, 3
a, 3b...Half body, 7...Outer wall, 8...Inner wall,
9... Inward engagement piece, 10... Outer wall, 11... Intermediate wall, 14, 14'... End wall, 15... Lateral engagement piece, A... Concrete body, C... Base opening.

Claims (1)

[Scope of utility model registration request] A donut-shaped outer member that can be divided into two semicircular halves of the same shape, and a disc-shaped inner member whose outer diameter matches the inner diameter of the outer member, each made of plastic. Each of the half bodies has an inner wall erected on the inner periphery, a downwardly hook-shaped inward engaging piece extending from the inner periphery of the inner wall, and an outer wall on the outer periphery, and an outer wall connected to the outer periphery. Intermediate walls are concentrically erected between the inner walls, a part for pouring a bonding material such as mortar is formed around the outer wall and the intermediate wall, and end walls are extended to each end edge. and that one end wall is provided with a downward hook-shaped horizontal engaging piece extending therethrough into which the other end wall is fitted, and the inner member is provided with an outer wall on its periphery into which the inward engaging piece is fitted. Features a bottom cover for concrete utility poles.