JPH0330455Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a bottom covering structure for a waterway, such as a waterway in a sewage treatment plant or an irrigation waterway, whose bottom surface is prone to erosion and unevenness.

[Conventional technology]

When a concrete trench is used as a waterway, such as a waterway or an irrigation canal, the bottom surface becomes uneven due to erosion over time, which obstructs water flow and makes it easier for garbage to accumulate on the bottom surface. Therefore, attempts have been made to cover the bottom surface of such waterways with a synthetic resin coating material that is highly slippery and wear-resistant.

In such cases, the entire surface of the waterway has traditionally been lined with FRP. However, in recent years, attempts have been made to coat the surface with a synthetic resin material such as ultra-high molecular weight polyethylene resin, which has excellent lubricity and abrasion resistance, to smooth the flow of water. In this case, the structure is such that a shaft body such as a hole-in anchor is protruded from multiple locations on the bottom of the waterway, and a synthetic resin plug body is hammered into the arrow-shaped irregularities carved on the shaft body. The stepped portion formed on the covering material by the body is pressed against the bottom surface of the water channel, and the surface of the stopper body is set flush with the surface of the covering material.

According to this structure, since the stopper is made of synthetic resin and is flush with the covering material, unevenness in the covering surface is less likely to occur, and the covering material is less likely to have irregularities due to erosion, so water flow is smooth. Furthermore, since the plug body is engaged with the uneven portion of the shaft body without loosening, a secure fixation state is maintained, and the fixation reliability of the covering material is maintained.

However, when walking on the covering material in order to clean limescale and the like adhering to the covering surface, the highly slippery nature of the covering surface is rather inconvenient. That is,
Due to the high slipperiness of the coated surface, there is a risk of an unexpected situation such as a worker slipping and falling, which poses a safety problem during maintenance.

On the other hand, a shaft body such as a hole-in anchor with a threaded groove is projected onto the bottom surface of the waterway, and a nut screwed into the threaded groove of this shaft body presses the stepped part of the covering material against the bottom surface of the waterway. In some cases, a structure was adopted in which the surface of the nut was flush with the surface of the covering material. According to this, high fixing reliability is maintained for a long period of time by making the nut made of metal. However, even with this fixing structure, the nut and the covering material are flush with each other, which poses a safety problem during maintenance.

[Problem that the invention attempts to solve]

As mentioned above, in the conventional covering structure, there was a problem in that even if the lubricity of the covering material was improved to make water flow smoother, it lacked safety during maintenance.

The present invention solves the above-mentioned problems, and has a structure that not only fixes the covering material to the waterway but also improves safety during maintenance.

[Means for solving problems]

In order to solve the above problems, the present invention has a plurality of shaft bodies protruding from the bottom surface of the water channel, and a stepped portion formed on the covering material by a pressing member engaged with these shaft bodies is provided on the bottom surface of the waterway. It is characterized in that the pressing member protrudes from the covering material.

[Example 1] In FIG. 1, 1 is a waterway, and 2 is a covering material applied to the bottom surface of the waterway 1. This covering material 2 is made of a synthetic resin material with excellent slipperiness and wear resistance, such as ultra-high molecular weight polyethylene resin, and is fixed to the bottom surface of the water channel 2 at a plurality of predetermined locations.

FIG. 2 shows a fixed portion of the central portion A of the covering material 2 sandwiched between the two imaginary lines shown in FIG.
In this part, a hole 4 having a stepped part 3 is formed in the covering material 2 as shown in FIG. The body 5 is protruding. The shaft body 5 has an arrow-shaped uneven portion 6 at its upper end, and a thread groove 7 is formed in the lower part of this uneven portion 6. The diameter of this uneven portion 6 is smaller than that of the thread groove 7. In such a shaft body 5, a pressing member 10 that engages with the shaft body 5 is composed of two members: a metal nut 8 and a plug body 9 made of the same material as the covering material 2.
The nut 8 is screwed into the thread groove 7 of the shaft body 5, and the stepped portion 3 formed in the hole 4 of the covering material 2 by the nut 8
is pressed against the bottom surface 1a of the water channel 1. Further, the plug body 9 is driven into the upper end portion of the shaft body 5 and engages with the uneven portion 6 of the shaft body 5 in the removal direction. This plug body 9 is provided with a cavity having a diameter slightly smaller than that of the concavo-convex portion 6, and is adapted to be driven into the concave-convex portion 6 of the shaft body 5. This plug body 9 protrudes from the covering material 2. As can be inferred from FIG. 1, the plug 9 and the covering material 2 are flush with each other except for the central portion described above.

[Effect]

In the waterway 1 described above, when a worker walks on this part A during maintenance of the waterway 1, the covering material 2
The stopper 9 of the pressing member 10, which protrudes from the holder, serves as a non-slippery. Therefore, unexpected situations such as a worker slipping and falling can be prevented, and safety during maintenance is improved. Nevertheless, since both the covering material 2 and the plug body 9 are made of a highly slippery material such as ultra-high molecular weight polyethylene, there is no risk of rusting and dirt is less likely to adhere or accumulate. In addition, materials with high lubricity such as the ultra-high molecular weight polyethylene mentioned above also have excellent wear resistance, so they are less likely to develop unevenness due to wear even after long-term use, and from this point of view, dirt adhesion and accumulation may occur. Hateful.

In this embodiment, the pressing member 10 located only in the central part A of the covering material 2 is made to protrude from the covering material 2, and the pressing member 10 located in other parts is made to protrude from the covering material 2.
Therefore, even if the water flow is somewhat obstructed by the pressing member 10 protruding from the covering material 2, the degree of this is suppressed to a minimum, so there is no practical inconvenience. Does not occur. Here, when the covering material 2 and the plug 9 are made of ultra-high molecular weight polyethylene, it is sufficient that the protruding width of the pressing member 10 is as small as about 2 to 3 mm. Further, if the pitch of the shaft body 5 to which the pressing member 10 is attached is about 200 mm, the covering material 2 can be firmly fixed, and the operator's feet can rest on the protruding portion of the pressing member 10, making it safe. Further, the shape of the protruding portion of the pressing member 10 is not limited to the illustrated example, and may be partially spherical or other flat shape. The width of these protrusions and the shape of the protruding parts may be such as long as they can suppress slipping when the worker walks, and the width of the protrusions should be kept to a minimum, and the width of the protrusions should be larger than that. may cause significant obstruction to water flow.

Further, according to the fixing part structure shown in FIG. 2, the fixing reliability of the covering material 2 is ensured by the pressing force of the nut 8, and the plug body 9 prevents the nut 8 from loosening, so that the above-mentioned fixing is possible. Reliability is maintained over a long period of time. In addition, if the sheathing material 2 is fixed using a nut and a plug as shown in Fig. 2 in areas other than the central part of the sheathing material 2, the fixing reliability of the sheathing material 2 will be improved over a long period of time. maintained.

[Embodiment 2] In the embodiment shown in FIG.
The plug body 9, which is 0, is hammered in. This plug body 9
protrudes from the covering material 2. Even with such a fixing structure, the covering material 2 is pressed and fixed against the water channel 1 by the stopper 9, making the water flow smooth, and also preventing unexpected situations such as workers slipping and falling during maintenance. . In the fixing structure of FIG. 3, the same parts as those of the fixing structure of FIG. 2 are given the same reference numerals, and details are omitted.

[Embodiment 3] In the embodiment shown in FIG. 4, the shaft body 5 is provided with a thread groove 7, into which a nut 8, which is a pressing member 10, is screwed. This nut 8 protrudes from the covering material 2. Even with such a fixing structure, the covering material 2 is firmly pressed by the nut 8, and the protruding portion prevents the operator from slipping and falling. Also in the fixing structure of FIG. 4, the same parts as those of the fixing structure of FIG. 2 are given the same reference numerals, and details are omitted.

[Effect of idea]

As is clear from the above, the coating structure of the present invention presses the coating material against the waterway to smooth the water flow in the waterway, and at the same time improves safety during maintenance. This is to make it less likely to occur. Therefore, it is extremely effective as a bottom covering structure for waterways in sewage treatment plants.

In particular, in the present invention, since the stepped portion formed on the covering material is pressed by the pressing member, the pressing member is firmly engaged with the shaft body, and has the advantage that dust does not adhere or accumulate easily. There is. That is,
When the sheathing material does not have a stepped part and the surface of the sheathing material is pressed by a pressing member, in order to firmly engage the pressing member with the shaft body, the engagement distance must be sufficiently large. However, if this is done, the width of the protrusion from the surface of the covering material becomes unnecessarily large, making it easy for dust to adhere and accumulate.
For example, when engaging the pressing member by screwing it into the thread groove of the shaft body, the pressing member should be inserted over 3 to 4 threads, which is the minimum engagement distance to ensure a secure engagement state. If screwing is attempted, the protrusion width of the pressing member will be at least 5 mm due to the screw pitch. However, it has been found that the protruding width of the pressing member that does not cause the adhesion or accumulation of dust and that ensures safety during maintenance is approximately 3 mm, so in the above case, the protruding width of the pressing member may be increased unnecessarily. growing.

[Brief explanation of drawings]

Fig. 1 is a partial perspective view showing a passageway partially employing a covering structure according to an embodiment of the present invention, Fig. 2 is an enlarged sectional view of the main part of the covering structure, and Figs. 3 and 4 are other views. FIG. 2 is an enlarged cross-sectional view of a main part of the embodiment. DESCRIPTION OF SYMBOLS 1... Water channel, 2... Covering material, 3... Stepped part of covering material, 5... Shaft body, 6... Uneven part of shaft body, 7...
Threaded portion of shaft body, 8... Nut, 9... Plug body, 10
...Press member.

Claims (1)

[Scope of utility model registration request] A plurality of shaft bodies are made to protrude from the bottom surface of the waterway, and the stepped portion formed in the synthetic resin covering material is pressed against the bottom surface by a pressing member that is engaged with these shaft bodies, and this pressing member A structure for covering the bottom surface of a waterway, characterized in that: protrudes from the covering material.