JPS6241103Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to drainage basins, and in particular to improvements in the legs provided in straight drainage basins, curved drainage basins, etc., to maintain their posture during construction.

Conventionally, in a straight drainage basin 1 as shown in FIGS. 1 and 2, for example, a drainage basin 2 which is circular in plan view and has a drainage passage 3 with a substantially semicircular cross-section formed in the diametrical direction at the bottom is formed on both sides of the upper part of the basin body 2. , a cross-sectional shape T extending to a position slightly below the lower end of the drainage passage 3
A letter-shaped leg portion 4 is integrally provided vertically, together with supporting protrusions 5 protruding from the lower surface of both ends of the drainage passage 3.
It is constructed to maintain and support the posture of this straight drainage basin 1. However, since the legs 4 are long and vertical, they easily break, and if they break, the entire drainage basin becomes unusable, resulting in a large loss.In order to prevent them from breaking, the cross section is made into a T-shape, as shown above, to remove soil and sand. When backfilling, a cavity is created on the back side of the leg, causing problems such as tilting and sinking of the drainage basin, and furthermore, the shape becomes complicated because the main body 2 and leg 4 are integrally molded. The drawback was that it was not easy to mold.

In view of these conventional problems, it is an object of the present invention to provide a drainage basin whose main body can be used even if the legs are broken, which is easy to mold, and whose manufacturing cost can be reduced.

For this reason, the present invention consists of a main body and legs that are constructed separately, and that the legs are removably attached by engaging with appropriate locations on the main body, so that in the event that the legs break, To provide a drainage basin which can be easily molded, easily molded, and manufactured at a low cost by requiring only the leg parts to be replaced and by molding the main body part and the leg parts separately.

Embodiments of the present invention will be described below with reference to FIGS. 3 to 7. In Figures 3 and 4, 1
Reference numeral 1 denotes a straight drainage basin, which is circular in plan view and has a basin main body part 12 in which a drainage passage 13 having a cross-section of approximately semicircular shape is formed in the diametrical direction at the bottom, and this basin body part 12 is formed separately. It is composed of a leg section 14 that is detachably attached to the main body section 12. An annular receiving flange 15 having an L-shaped cross section is protruded from the outer circumference of the upper end of the square main body 12, and a height installed at the upper part is provided between the annular receiving flange 15 and the outer peripheral surface of the upper end of the square main body 12. A fitting groove 16 is formed into which the lower end of the length adjusting tube or the peripheral edge of the manhole cover fits. Engagement protrusions 17 are provided protrudingly on both sides of the center of the drainage passage 13 on the outer surface of the middle part in the height direction of the main body part 12 . Both ends of the drainage passage 13 communicate with socket tubes 18 , 18 which are protruded from the outer surface of the main body portion 12 . On the other hand, the leg portion 1
4, as shown in FIG. 4, consists of a flat leg plate 19 and a bottom plate 20 extending horizontally from its lower end, and the upper end of the leg plate 19 has an annular receiving flange 15 at the upper end of the main body 12. A U-shaped engagement recess 21 is formed on the upper end surface, the outer surface, and the lower surface, and from the intermediate part of the leg plate 19, the engagement protrusion 17 and the outer surface of the square main body 12 are formed at the tip. A support arm 23 having an engaging protrusion 22 protruding therebetween extends toward the outer surface of the main body 12 . This leg portion 14 is
As shown in FIG.
5 and the engaging protrusion 22 is engaged with the engaging protrusion 17, thereby being removably attached to the main body part 12. In this installed state, the lower surface of the bottom plate 20 is located at the same height as the lower surface of the supporting protrusions 24 provided on the lower surfaces of both ends of the drainage passage 13, and the outer peripheral edge 20a of the bottom plate 20 The straight drainage basins 11 are formed in an arcuate shape that can be fitted onto the inner periphery of the drainage basins 11, and are configured so that the straight drainage basins 11 can be stacked in multiple stages without sideways sliding.

In the straight drainage basin 11 having the above structure, with the legs 14 attached to the basin main body part 12, it can be stacked in multiple stages for storage and transportation as in the past, and it can be installed while maintaining its posture during construction. Further, when the leg portion 14 is made of a flat leg plate 19, there is no risk of creating a cavity when backfilling with earth and sand. Furthermore, in the event that the leg portion 14 is broken during transportation or construction, it is sufficient to leave the main body portion 12 as is and replace only the broken leg portion 14 with a new one. In addition, during manufacturing, the main body portion 12 and the leg portions 14 are formed separately and have a simple shape, making it much easier to mold than when both are integrated and the shape is complex, and the overall cost is low. Furthermore, it is also possible to provide the bottom plate 20 and the like on the legs 14, and it is also possible to increase the stability of the drainage basin during construction and after installation.

FIGS. 5 and 6 show other embodiments. The straight drainage basin 25 is composed of the basin main body part 12 similar to the above and leg parts 26 detachably attached to the socket tubes 18, 18. As shown in FIG. 6, this leg portion 26 is composed of an arcuate plate 27 of 180° or more that externally engages with the socket tube 18, and a bottom plate 28 that supports this arcuate plate 27 via mounting ribs 29. The outer periphery 28a of the bottom plate 28 can be fitted into the inner periphery of the annular receiving flange 15 of the main body portion 12. Furthermore, an engaging protrusion 30 is formed on the mounting rib 29 at a stepped portion formed at a connecting portion between the socket tube 18 and the drainage passage 13.

In the embodiment described above, the straight drainage basin 11,
Although only the case 25 is illustrated, the present invention is not limited to a straight drainage basin, but can also be applied to a curved drainage basin 30 as shown in FIG. 7, for example. The leg portion 14 shown in FIG. 4 is attached to the side of the main body portion 31 opposite to the center of curvature of the drainage passage 32.

According to the drainage basin of the present invention, as is clear from the above explanation, the legs are removably attached to the basin body, so even if the legs break, the basin body will remain intact. It is only necessary to replace the broken leg while using it, and the loss in the case of breakage is small. Therefore, even if the strength of the legs is sacrificed to some extent, it is possible to prevent cavities from being formed due to the legs when backfilling with earth and sand, and it is also possible to prevent tilting and subsidence after construction. Furthermore, since the main body part and the leg part are molded separately, the shape of each part becomes simple, and the molding becomes much easier, so that the whole can be manufactured at a low cost, and other great effects are exhibited.

[Brief explanation of the drawing]

Figure 1 is a plan view of a conventional straight drainage basin.
Figure 2 is a sectional view taken along line A-A in Figure 1, Figures 3 and 4.
The figures show a straight drainage basin according to an embodiment of the present invention, Fig. 3 is a vertical sectional view taken in a plane perpendicular to the axis of the drainage passage, Fig. 4 is a perspective view of the legs, and Fig. 5
Figures 6 and 6 show straight drainage basins of other embodiments, Figure 5 is a vertical sectional view taken along a plane passing through the axis of the drainage passage, Figure 6 is a perspective view of the legs, and Figure 7 is It is a top view showing an example in a curved drainage basin. 11, 25 are straight drains, 12, 31
14 and 26 are leg parts, 15 is an annular receiving flange, 17 is an engagement protrusion, 18 is a socket tube, 19 is a leg plate, 20 and 28 are a bottom plate, 21 is an engagement recess, and 22 is an engagement part. The mating protrusion, 27 is the arc plate, and 30 is the bent drainage.

Claims (1)

[Scope of utility model registration request] A drainage basin characterized in that a main body part and a leg part are constructed separately, and the leg parts are removably attached by engaging with appropriate parts of the main body part.