JPH0246545Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a manhole frame to which a manhole cover is attached and detached.

[Conventional technology]

In some regions, when the peripheral wall of a manhole installed at a branch, gathering, or turning point of a sewer or domestic gray water channel is constructed by burying a cylindrical azimuth star underground, It is obligatory to attach a manhole frame to the upper end of the adjuster. In addition, if a manhole frame is attached to the upper end of the azimuth star in a fitted manner, the azimuth star will be reinforced by the manhole frame, and the deformation resistance of the azimuth star against loads such as earth pressure will be improved. It is particularly effective to attach a manhole frame if the manhole is made of a synthetic resin molded product with poor rigidity.

FIG. 6 shows a state in which a conventional manhole frame 100 is attached to an adjuster star 200. As shown in the figure, the adjuster star 200 has a connecting portion 220 at the upper end of a cylindrical body wall 210. This connecting part 220 is provided with a groove part 223 formed between a tall external rib 221 and a low internal rib 222, and when adjusting the depth of the manhole by stacking a plurality of adjusters, the groove part 2
The lower end of the barrel wall of the upper stage adjuster is fitted into 23. Further, the manhole frame 100 is attached to the connecting portion 220 of the adjuster star 200 at the top stage, as shown in the figure. The manhole frame 100 includes an annular protrusion 130 projecting downward on the inner circumferential portion of an annular flange member 120 forming a manhole opening 110.
An engagement groove 140 into which a manhole cover (not shown) can be attached and detached is provided on the upper surface side. When the manhole frame 100 is attached to the adjuster star 200, the annular protrusion 130 is fitted into the external rib 221 of the connecting portion 220, and the flange member 120 is fitted into the external rib 221 of the connecting portion 220.
is mounted on its external rib 221. Also,
The gap between the collar-shaped member 120 and the external rib 221 is closed with caulking material 300 to prevent water from seeping through the gap.

[Problem that the invention attempts to solve]

By the way, when attaching the manhole frame 100 to the adjuster star 200, the caulking material 30
After the manhole frame 100 is interposed between the manhole frame 100 and the external rib 221, the manhole frame 100 must be positioned so as not to move until the caulking material 300 is completely cured. However, as is clear from FIG. 6, the conventional manhole frame 100 can be easily pulled out upwards relative to the adjuster star 200, and moreover, the manhole frame 1
Since play S is formed between the annular projection 130 of 00 and the external rib 221, in order to prevent the manhole frame 100 from moving, it is necessary to move the manhole frame 100 not only in the vertical direction but also in the horizontal direction. In addition, since the caulking material 300 requires time to cure, there is a problem in that a lot of time and effort is required for its positioning. Another problem was that the next process, such as backfilling with soil, could not be performed until the caulking material 300 had completely cured.

This invention solves these problems,
Conventionally, by providing a manhole frame that is simultaneously positioned vertically and horizontally with respect to the adjuster star when the flange-shaped member is mounted on the upper end opening edge of the adjuster star, for example, the upper end of the external rib, To omit trouble and labor for positioning, which has been a problem, and to enable the next process to be carried out promptly without waiting for the caulking material to finish curing.

[Means for solving problems]

In order to achieve the above object, the manhole frame of the present invention has a flange-shaped member mounted on the upper opening edge of a cylindrical adjuster, and an inner part that is engaged with a stepped lower surface provided on the inner surface of the adjuster. A hook and an external hook that is engaged with a stepped lower surface provided on the outer surface of the adjuster star are provided in a falling shape, and a stopper that comes into contact with the inner or outer surface of the adjuster star is provided on the lower surface of the flange-shaped member. It is characterized by the fact that it is provided.

[Effect]

In the manhole frame having the above configuration, when the collar-shaped member is mounted on the upper opening edge of the adjuster, each of the internal hook and the external hook engages with the lower surface of the step provided on the inner or outer surface of the adjuster. , vertical movement of the manhole frame is prevented. Further, in the above state, the stopper on the lower surface of the flange-shaped member comes into contact with the inner or outer surface of the adjuster star, thereby preventing the manhole frame from moving in the horizontal direction.

〔Example〕

Fig. 1 is a plan view of the manhole frame 1 of the present invention, Fig. 2 is a cross-sectional view of the manhole frame 1 in use, taken along line A-A in Fig. 1, and Fig. 3 is a top view of the manhole frame 1 according to the present invention.
FIG. 4 is an enlarged end view of the A part in the figure, FIG. 4 is an end view of the B part in FIG. 2, and FIG. 5 is an end view taken along the line v--v in FIG.

In these figures, reference numeral 2 denotes a collar-shaped member of the manhole frame 1, and in the illustrated example, one with an annular outer shape is shown, but it may also have a rectangular or square outer shape. If it is left in place, the deformation resistance will be improved compared to the annular case. An annular protrusion 3 that protrudes downward is provided on the inner circumferential portion of the brim-shaped member 2, and an annular protrusion 3 that protrudes downward is provided on the upper surface side of the annular protrusion 3, and a manhole cover 400 shown by a phantom line in FIG. 2 is attached and detached. A groove 4 is provided, and a groove wall portion 5 of the engagement groove 4 is reinforced by auxiliary ribs 6 at a plurality of locations. Further, the collar-shaped member 2 is integrally provided with two internal hooks 7, 7 and two external hooks 8, 8. Of these, the internal hooks 7 are provided at two locations displaced by 180 degrees on the inner circumference of the annular projection 3, while the external hooks 8 are provided at two locations slightly outside of the annular projection 3, displaced by 180 degrees. It is set in. The inner hook 7 and the outer hook 8 which are adjacent to each other in the circumferential direction of the collar-shaped member 2 are arranged so as to be displaced by 90 degrees from each other. In addition, the collar-shaped member 2
Four stoppers 10 are provided at equal intervals on the inner lower surface of the holder. 7a is a falling portion of the internal hook 7, and 8a is a falling portion of the external hook 8.

When attached to the manhole frame 1 and the adjuster star 200, the annular protrusion 3 is fitted into the external rib 221 of the connecting portion 220 provided on the adjuster star 200, and the flange shape The member 2 is mounted on an external rib 221 forming the upper opening edge of the adjuster star 200.
In addition, the two internal hooks 7, 7 are attached to the adjuster star 2.
The two external hooks 8, 8 are engaged with the lower surface 222 of the connecting portion 220 that protrudes toward the inner surface of the body wall 210 of No. Engaged to lower surface 224. Furthermore, the four stoppers 10 are brought into contact with the inner surface 223 of the connecting portion 220. moreover,
The gap between the collar-shaped member 2 and the external rib 221 is closed with a caulking material 300.

In this way, the inner hook 7 engages the lower surface 222 of the connecting part 220 and the outer hook 8 engages the lower surface 222 of the connecting part 220.
When the manhole frame 1 is engaged with the lower surface 224 of the
The manhole frame 1 is prevented from slipping out above the adjuster star 200, and the manhole frame 1 is positioned in the vertical direction due to this slip-off prevention effect and the fact that the flange member 2 is mounted on the external rib 221. Further, the stopper 10 is connected to the inner surface 223 of the connecting portion 220.
By contacting the manhole frame 1, the manhole frame 1 is positioned in the horizontal direction. Therefore, as shown in FIG. 3, FIG. 4, and FIG. Even if there is play S between them, there is no fear that the manhole frame 1 will be displaced. On the other hand, when attaching the manhole frame 1 to the adjuster star 200,
After applying the inner hooks 7, 7 and the outer hooks 8, 8 to the connecting portion 220, press them downward, using their elasticity to get over the connecting portion 220, and attaching them to the lower surfaces 222, 224 of the connecting portion 220. All you have to do is engage it. Therefore, after the manhole frame 1 is attached to the adjuster star 200, the next process can be carried out immediately without having to separately position the manhole frame 1 or waiting for the caulking material 300 to finish curing.

As shown in FIGS. 2 and 3, a hook 9 is provided extending from one internal hook 7, and a chain 500 attached to the manhole cover 400 is pulled onto this hook 9. If you hang it, you can use it as a manhole cover 40
0 theft can be effectively prevented.

In this embodiment, the inner hook 7 or the outer hook 8 is engaged with the lower surfaces 222, 224 of the connecting portion 220 provided on the adjuster star 200, but this point is different from the inner surface of the body wall 210 of the adjuster star 200, for example. Separate stepped portions may be formed on the outer surface, and the inner hook 7 or the outer hook 8 may be engaged with the stepped lower surface. However, as shown in the illustrated Asia Star 200, the trunk wall 2
10 is provided with a connecting portion 220 protruding from its inner and outer surfaces, if the above embodiment is used, there is no need to separately provide a stepped portion, which reduces material yield and cost. It is effective in terms of mold production. Further, although the stopper 10 is provided on the inner lower surface of the manhole frame 1, the stopper 10 is not limited thereto, and may be provided on the outer lower surface of the manhole frame 1 and brought into contact with the outer surface 225 of the connecting portion 220. Furthermore, the falling portion 7a of the internal hook 7 is connected to the inner surface 223 of the connecting portion 220.
When the falling part 8a of the external hook 8 is brought into contact with the outer surface 225 of the connecting part 220 to eliminate play S, the manhole frame 1 is positioned at the corresponding contact part, and the falling part 7a , 8a serve as a stopper, eliminating the need to provide a separate stopper.

By the way, in order to position the manhole frame 1 with respect to the adjuster star 200 in the vertical and horizontal directions, instead of providing the internal hook 7 and the external hook 8 separately, only the internal hook or only the external hook may be provided. . However, when both are provided, not only a more reliable positioning effect is achieved than when only one is provided, but also the following excellent separation prevention effect is achieved. That is,
When the manhole frame 1 is displaced on the adjuster star 200 due to a large horizontal pressing force,
For example, in a manhole frame provided with only internal hooks, some of the internal hooks may come off the stepped lower surface of the adjuster star, causing the manhole frame to easily come off the adjuster star. However, if the internal hooks 7 and external hooks 8 are provided separately, even if some of the internal hooks 7 separate from the stepped lower surface, the external hooks 8 on the same side as the internal hooks will not Since it does not come off from the lower surface, there is no need to worry about the manhole frame coming off from the Asia Star. Such an effect becomes more pronounced as the internal hooks 7 and external hooks 8 are provided at more locations on the collar-shaped member 2.

[Effect of idea]

As described above, the manhole frame of the present invention can be easily attached to the adjuster star, and can be reliably positioned in the vertical and horizontal directions simply by attaching it to the adjuster star. Therefore,
There is no need to separately position the manhole frame until the caulking material interposed in the gap between the manhole frame and the adjuster is cured, and furthermore, the next process can be performed immediately after installation. In particular, in the present invention, an internal hook and an external hook are provided for positioning the manhole frame, so even if a large pressing force is applied to the manhole frame after the caulking has finished curing, the manhole frame will not move in the azimuth position. It has the effect of not coming off easily.

[Brief explanation of drawings]

FIG. 1 is a plan view of a manhole frame according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line A-A in FIG. 1, showing the manhole frame in use.
The figure is an enlarged end view of the A part in Fig. 2, Fig. 4 is an enlarged end view of the B part in Fig. 2, Fig. 5 is an end view taken along the v-v line in Fig. 1, and Fig. 6 is an end view of the conventional FIG. 2 is an enlarged cross-sectional view of main parts showing a state in which the manhole frame is attached to the adjuster star. 2... Flange-shaped member, 7... Internal hook, 8... External hook, 10... Stopper, 200... Adjuster star, 221... External rib, 222, 224
...Bottom surface of the connection part (stepped bottom surface).

Claims (1)

[Scope of utility model registration request] A collar-shaped member mounted on the upper opening edge of the cylindrical adjuster has an internal hook that engages with a stepped lower surface provided on the inner surface of the adjuster, and a stepped portion provided on the outer surface of the adjuster. A manhole frame characterized in that an external hook that is engaged with the lower surface is provided in a falling shape, and a stopper that comes into contact with the inner or outer surface of the adjuster star is provided on the lower surface of the collar-shaped member.