JPH0240675Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention relates to a reinforcing structure for the lid of a floor inspection port installed to inspect the wiring and piping of various equipment installed under the floor. It is.

Generally, the lid of this type of floor inspection port has a support material disposed within an inner frame that fits into the opening of the outer frame so that it can be opened and closed, and a facing member such as tiles is stretched over this support material. However, since a large load is often applied to the lid, it is necessary to maintain the support material to a degree that it will not be deformed by, for example, body weight or the wheels of a truck.

[Prior Art] Conventionally, as shown in FIG. 6, as shown in FIG. 6, the support material of the lid body 1 is formed into an elongated rectangular shape in plan view, and has a large number of beads 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 4, 4, 2, 4 beads 2, 2... Conventionally, a plurality of supporting plates 3 each having a protruding structure were formed by arranging them in parallel.

That is, in such a conventional example, the rigidity and strength against bending of the support plate 3 are increased by the beads 2, 2, . . . to increase the strength of the entire lid body.

[Problem that the invention attempts to solve]

However, in such a conventional example, the total volume of the beads 2, 2... is quite large, and when a relatively expensive material such as aluminum is used as the support plate 3, the material It had the disadvantage of being expensive and uneconomical.

The present invention has been devised to eliminate such drawbacks, and an object of the present invention is to provide a reinforcing structure that can provide a cover for a floor inspection port that is inexpensive and has high strength.

[Means for solving problems]

As shown in FIGS. 1 and 2, which correspond to embodiments, the present invention has a plurality of support plates 3, 3, etc. arranged in an inner frame 6 that fits into an opening of an outer frame 4 so as to be openable and closable. This relates to the reinforcing structure of the lid body 1 which is constructed by extending the mounting member 7 on these support plates 3, 3..., and the plurality of support plates 3, 3... 3... are connected to each other by mutually engaging engaging protrusions 8 that protrude downward from the widthwise side ends thereof.

On the other hand, a reinforcing member 9 is disposed on the back side of the supporting plates 3 arranged in parallel while being connected to each other in this way, and a reinforcing member 9 is disposed in the direction in which the supporting plates 3 are arranged in parallel. A cutout-shaped storage portion 10 is appropriately recessed in a portion of the plate 3 that intersects with the engagement protrusion 8 in order to prevent interference with the engagement protrusion 8, so that the plate 3 straddles the engagement protrusion 8. are doing.

[Effect]

Therefore, in the present invention, for example, referring to the one shown in FIG. 1, the lid body is
The four supporting plates 3, 3... and the two reinforcing members 9, 9 are reinforced in the width direction by the engaging protrusions 8, 8, and in the longitudinal direction by the reinforcing members 9 or the inner frame 6. sum augmented by
Since it is divided into 12 blocks and the strength and rigidity of each block are extremely high, it is no longer necessary to provide a bead protruding from the back surface of each support plate 3.

〔Example〕

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 4 show a lid body to which a reinforcing structure according to an embodiment of the present invention is applied.

This lid 1 is configured to close an opening of an aluminum outer frame 4 fixed to a floor base using an anchor device, and an inner frame 6 in this lid 1 is , four frame members 6a, 6 formed by extruding aluminum material.
It is formed by framing a... into a substantially rectangular shape, and
The support plate 3 arranged in parallel inside the inner frame 6 is also formed by extrusion molding an aluminum material, and the cross-sectional shapes of the engaging protrusions 8 formed on the back surface of both side edges are made equal in the longitudinal direction. , the engagement protrusion 8 can be integrally formed during extrusion molding.

On the other hand, the engaging protrusions 8, 8 formed on the back side of both side edges of the support plate 3 have fitting protrusions 8a extending toward the sides.
There are two types: one in which a fitting protrusion 8a and a fitting recess 8b having a shape that can be fitted into the fitting protrusion 8a are formed. A plurality of support plates 3, 3, . . . are arranged in parallel while being fitted into each other (FIG. 3b).

Further, a portion of the support plate 3 corresponding to the inner wall portion of the inner frame 6 is made flat without the engagement protrusion 8 formed thereon, and this flat portion 8c is defined as the inner wall portion of the inner frame 6.
After placing it on the receiving part 6b which is made to project inward from the
It is fixed by tightening it together with (Fig. 3a).

In the embodiment shown in FIG. 3b, the fitting protrusion 8a and the fitting recess 8b have a cross-sectional shape such that the fitting cannot be released simply by moving the support plate 3 in the width direction. However, as in this embodiment, a flexible material such as vinyl is not used as the facing member 7, and instead a rigid material such as a tile is used as the facing member 7. In the case of using a material having the same structure, as shown in FIG. 3c, it is also possible to form a shape in which the support plates 3 are fitted into each other only by lateral movement.

Next, in this embodiment, the reinforcing member 9 is
As shown in Fig. 4, a galvanized iron plate is drawn into a hat shape, but its cross-sectional shape is different from that of other types having a section modulus sufficient to meet the required rigidity and strength requirements. It is possible to change the shape, and the material can be arbitrarily selected from the above viewpoints.

In addition, in FIG. 1, the reinforcing member 9 and each supporting plate 3, 3... are fixed with rivets 14, and two reinforcing members 9, 9 and two engaging protrusions on each supporting plate 3, 3... The block surrounded by the strips 8, 8, etc. is made completely rigid to improve the overall rigidity or strength, but the stiffness of the reinforcing member 9 is so high that its deflection can be almost ignored. If possible, only the both ends may be fixed.

Furthermore, a notched storage portion 10 of the reinforcing member 9
As shown in FIG. 3b, by bringing the upper surface of the engagement protrusion 8 into contact with the back surface 8d of the engagement protrusion 8, it is possible to reduce the strength burden on the fitting portion of the engagement protrusion 8.

Next, to explain the method of manufacturing a lid body to which the present invention is applied, first, a long support plate 3, which has been formed in advance to have an appropriate width, is adjusted to a required size, for example, as shown in FIG. When the lid body 1 having a rectangular shape in plan view is formed using four support plates 3, 3, . . ., a total of four support plates 3 are prepared in appropriate combinations.

After that, one of the engagement protrusions 8 of the two support plates 3, 3 located corresponding to the inner wall of the inner frame 6 is cut off to form the flat part 8c (in this case, the flat part 8c is formed in advance at this position). It is also possible to separately form the support plate by extrusion processing.), and the storage hole 16 is bored in the area where the handle 15 is installed.

Next, after fitting the fitting protrusion 8a and the fitting recess 8b of each support plate 3 to connect them to each other, the support plate 3 is placed on the receiving part 6a of the inner frame 6, and the plurality of supports arranged in parallel are A reinforcing member 9 is arranged on the back side of the plates 3, 3..., and both ends thereof are fixed with rivets 14,
If desired, the reinforcing member 9 and the support plate 3 are connected using rivets 14 for each block.

At this time, the pitch of the storage portion 10 of the reinforcing member 9 is approximately the same as the width dimension of the support plate 3, and as long as the reinforcing member 9 is determined in advance to correspond to the support plate 3 to be used, its versatility is high. Therefore, it is also possible to cut a long piece to an appropriate length and use it.

In this way, a plurality of support plates 3,
3..., the handle 15 is attached, and the cover member 7 is attached to the upper surface of the support plates 3, 3... to complete the lid body 1.

Similarly, for example, as shown in FIG.
Furthermore, smaller lids can also be manufactured.

[Effect of idea]

As is clear from the above explanation, according to the reinforcing structure of the lid of the floor inspection port according to the present invention, the surface portion of the lid is formed by the engaging protrusion formed on the support plate and the reinforcing member, or by the engaging protrusion mentioned above. The strips and reinforcing members divide it into a plurality of blocks, each of which is stiffened or reinforced at its four side edges, so that the necessary strength can be achieved.

Therefore, there is no need to reinforce each support plate by forming beads, etc., and the material cost can be reduced.

[Brief explanation of drawings]

Figure 1 is a back view showing the cover of the floor inspection port to which the reinforcing structure of the present invention is applied, and Figure 2 is A-A in Figure 1.
Line sectional view, FIG. 3a is an enlarged sectional view of section B in FIG. 2, FIG. 3b is an enlarged sectional view of section C in FIG. 2, and FIG. 3c is another modification of the engagement protrusion. FIG. 4 is a cross-sectional view taken along the - line in FIG. 1, FIG. 5 is a plan view showing another embodiment of the lid body to which the present invention is applied, and FIG.
The figure is a side view showing a conventional example. 1...Lid body, 3...Support plate, 4...Outer frame, 6...
...Inner frame, 7...Front member, 8...Engagement protrusion, 9...
...Reinforcing member, 10... Storage section.

Claims (1)

[Scope of Claim for Utility Model Registration] A floor inspection port consisting of a plurality of support plates arranged side by side within an inner frame that fits into an opening in an outer frame so as to be openable and closable, and a facing member affixed to the support plates. In the lid body, the plurality of support plates are connected by engaging each other with engaging protrusions provided on the back surfaces of the side edges in the width direction of the support plates, and the plurality of support plates are connected to each other by engaging with each other. This is a cover for a floor inspection port, characterized in that a reinforcing member is fixed thereto, which is disposed in the direction in which the supporting plates are arranged side by side, and has cutout-shaped storage portions recessed in appropriate locations that span the engagement protrusions. Reinforcement structures in the body.