JPS6326473Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement in the structure of connecting an auxiliary cylinder for height adjustment to a drainage basin. The lower end circumference of the auxiliary tube 3 is fitted, and one of the inner wall on the inner circumferential side and the inner wall on the outer circumferential side of the fitting groove 2 is formed into an inclined guide surface 10 whose width increases upward, and the inner diameter of the lower end of the auxiliary cylinder 3 Connection structure of an auxiliary cylinder for adjusting the height of a drainage basin, which is secured by a locking means in which the diameter of the side corresponding to the inclined guide surface 10 is larger or smaller than the diameter of the lower end of the inclined guide surface 10. This is related to.

Conventionally, as shown in Fig. 1, the fitting groove 2 at the upper end of the drainage basin 1
Fit the lower end of the auxiliary cylinder 3 for height adjustment into the
The fitting peripheral edge 1 of the lid body 5 is fitted into the mounting groove 4 at the upper end of the auxiliary cylinder 3.
2 was fitted. However, in such a conventional example, since the fitting groove 2 and the lower end of the auxiliary cylinder 3 are only fitted, the fitting peripheral edge 12 of the lid body 5 is closer to the mounting groove 4 due to the molding precision of the synthetic resin. If the cover 5 is firmly fitted to the cover 5, there is a risk that the auxiliary cylinder 3 will come off together with the cover 5 when the cover 5 is removed for inspection or the like.

The present invention has been made in view of the above points, and the purpose of the present invention is to lock the lower end of the auxiliary cylinder in the fitting groove of the drainage basin using a locking means that utilizes the difference in diameter. To provide a connection structure for an auxiliary cylinder for adjusting the height of a drainage basin without the risk of the auxiliary cylinder coming off when a lid fitted to the auxiliary cylinder is attached and detached.

The present invention will be explained in detail below with reference to Examples. Reference numeral 1 denotes a drainage basin made of synthetic resin, which has a main inlet pipe 6, a sub-inlet pipe 7, and a main outlet pipe 8 on the side periphery, and has a main water groove 9 and a sub-water groove 9a on the bottom wall. . A fitting groove 2 that opens upward is formed in an annular shape on the outer periphery of the upper end of the drainage basin 1, and the inner wall of the fitting groove 2 on the inner circumferential side is formed as an inclined guide surface 10 that becomes wider at the top. The auxiliary cylinder 3 for adjusting the height is made of synthetic resin, and has an inner diameter smaller than the diameter of the lower end of the inclined guide surface 10. The upper end of the auxiliary cylinder 3 has a mounting groove 4 having the same shape as the fitting groove 2, and the inner wall on the inner peripheral side of the mounting groove 4 is formed as an inclined guide surface 10. The lid body 5 is made of synthetic resin or cast metal, and has the above-mentioned mounting groove 4 on the lower circumference.
A fitting periphery 12 is provided around the periphery. Therefore, during construction, the ground is excavated, drain pipes and drainage basins 1 are placed in the excavated trenches, and the drainage pipes are connected to the main inlet pipe 6, sub-inlet pipe 7, and main outlet pipe 8, respectively, and the drainage basins are 1
Fit the lower end circumference of the auxiliary cylinder 3 into the fitting groove of the auxiliary cylinder 3.
The fitting periphery 12 of the lid body 5 is fitted into the mounting groove 4 to fit the lid body 5. At this time, by press-fitting the auxiliary cylinder 3, the auxiliary cylinder 3 is firmly connected to the drainage basin 1 due to the difference between the inner diameter of the auxiliary cylinder 3 and the diameter of the lower end of the inclined guide surface 10.

In the embodiment shown in FIG. 5, the inner wall on the outer peripheral side of the fitting groove 2 is formed as an inclined guide surface 10 whose upper width becomes wider.
The outer diameter of the auxiliary cylinder 3 is made larger than the diameter of the lower end of the inclined guide surface 10. In this embodiment as well, by press-fitting the auxiliary cylinder 3 into the fitting groove 2, the auxiliary cylinder 3 is firmly connected to the drainage basin 1 due to the difference between the outer diameter of the auxiliary cylinder 3 and the diameter of the lower end of the inclined guide surface 10. be done.

In addition, in the above-mentioned embodiment, the lower end of the auxiliary tube 3 is locked in the fitting groove 2 of the drainage basin, but
It can be similarly used when a plurality of auxiliary cylinders 3 are connected vertically and the lower end of the auxiliary cylinder 3 located above is fitted and locked into the mounting groove 4 of the auxiliary cylinder 3 located below.

As described above, the present invention press-fits and locks the periphery of the lower end of the auxiliary cylinder into the fitting groove using a locking means that utilizes the difference between the diameter of the auxiliary cylinder and the diameter of the lower end of the inclined guide surface of the fitting groove. Therefore, the auxiliary tube is firmly connected to the drainage basin, and there is no risk that the auxiliary tube will come off together with the lid when the lid fitted on the upper end of the auxiliary tube is attached or removed. Moreover, since the locking method utilizes the difference between the diameter of the inclined guide surface provided in the fitting groove and the diameter of the auxiliary tube, the auxiliary tube can be easily connected without complicated operations, and the structure is simple. Therefore, it can be easily manufactured.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front sectional view of the conventional example, Fig. 2 is a perspective view showing an embodiment of the present invention, Fig. 3 is a partially cutaway front sectional view of the same, and Fig. 4 is a drainage basin of the same. FIG. 5 is a partially cutaway front sectional view of another embodiment of the same as above, in which 1 is a drainage basin, 2 is a fitting groove, 3 is an auxiliary cylinder, and 10 is an inclined guide surface.

Claims (1)

[Scope of utility model registration request] Fit the lower end of the auxiliary cylinder for height adjustment into the fitting groove recessed around the upper end of the drainage basin, and insert either the inner wall on the inner circumference side or the inner wall on the outer circumference side of the fitting groove upward. The width of the slanted guide surface is increased, and the auxiliary cylinder is locked using a locking means in which the diameter of the lower end of the auxiliary cylinder is made larger or smaller than the diameter of the lower end of the slanted guide surface. A connection structure for the auxiliary cylinder for adjusting the height of the drainage basin.