JP7255216B2 - Supports for pit lids and support structures for pit lids - Google Patents

Description

The present invention relates to a pit lid support and a pit lid support structure for supporting a pit lid closing a pit.

For example, a cable pit that accommodates power and communication cables is formed in a U-shaped cross section with an open top in consideration of workability. For this reason, a pit cover is arranged to close the opening of the cable pit. The pit cover is made of concrete, steel plate, or the like, and its weight prevents it from floating or coming off (see, for example, Patent Document 1).

Moreover, such a pit cover is supported by a planar support portion (receiving frame) provided in the cable pit. For example, a supporting member made of angle steel or steel plate is protruded from the side wall of the cable pit, and by placing the end of the pit lid on this supporting member, the pit lid is flush with the ground. supported by Further, in order to adjust the height of the pit lid and prevent corrosion due to direct contact between the pit lid and the support member, support clogs may be provided on the lower surface of the pit lid.

JP 2011-15527 A

By the way, when inspecting the inside of the cable pit, the pit lid must be opened, but since the pit lid is heavy, the pit lid is lifted by holding one end of the pit lid. For example, as shown in FIG. 8, the pit lid 101 is opened by lifting one end of the pit lid 101 while the support clogs 103 on the other end side of the pit lid 101 are placed on the support member 111 . However, since the width of the support member 111 (the amount of protrusion from the side wall surface of the cable pit P) is as short as the width of the support clogs 103, the support clogs 103 on the other end side are disengaged from the support member 111 and the pit lid 101 is removed. There was a risk of falling into the cable pit P. Therefore, the worker had to lift the heavy pit cover 101 while being careful not to drop it, which was a heavy burden on the worker.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a pit lid support and a pit lid support structure capable of preventing the pit lid from falling when the pit lid is opened.

In order to solve the above-mentioned problems, the invention of claim 1 is provided with a support part facing a pit having a substantially U-shaped cross section and an upper opening, and supporting a pit lid closing the opening of the pit together with the support part. A pit lid support that includes a plurality of bridging portions that are constructed on the opposing support portions, and a plurality of bridging portions that are connected to the plurality of bridging portions, and when the plurality of bridging portions are constructed on the support portion, When the adjacent portion adjacent to the support portion and capable of supporting the pit lid being flush with the support portion and one end side of the pit lid located above the support portion are lifted, the a restricting portion that restricts movement of the other end side of the pit lid facing the one end side .

The invention of claim 2 is characterized in that, in the pit lid support of claim 1 , the restricting portion is composed of a fastening member that fastens the bridging portion and the adjacent portion.

According to a third aspect of the invention, a support portion facing the pit having a substantially U-shaped cross section and an upper opening is provided, and the pit lid support according to the first or second aspect is disposed on the support portion. A support structure for a pit lid characterized by:

According to the inventions of claims 1 and 3 , when a plurality of bridging portions are bridging the supporting portion, the adjacent portions are adjacent to the supporting portion and are flush with the supporting portion. That is, the pit lid can be supported not only by the supporting portion but also by the adjacent portion, and the supporting area for supporting the pit lid is expanded. Therefore, when one end side of the pit lid is lifted to open the pit lid, the other end side of the pit lid is restrained from coming off the supporting portion or the adjacent portion, thereby preventing the pit lid from falling into the pit. It becomes possible.

Furthermore , when one end side of the pit lid is lifted, movement of the other end side of the pit lid is restricted by the restricting portion, so that the other end side of the pit lid is reliably prevented from coming off the supporting portion or adjacent portion. becomes possible. As a result, it is possible to more reliably prevent the pit lid from falling into the pit.

According to the second aspect of the invention, the restricting portion is configured by the fastening member that fastens the bridging portion and the adjacent portion. In other words, since the fastening member also serves as the restricting portion, there is no need to provide a separate restricting portion, and a simple configuration and structure can be achieved.

1 is a plan view showing a pit lid support structure in which a pit lid support according to an embodiment of the present invention is arranged; FIG. It is the top view (a), front view (b), and right side view (c) of the support for pit lids of FIG. FIG. 4 is a plan view showing an arrangement state of the pit lid according to the embodiment of the invention; FIG. 4 is a cross-sectional view taken along the line AA of FIG. 3; FIG. 4 is a plan view of a pit showing a state in which the pit lid of FIG. 3 is opened; FIG. 3 is a cross-sectional view showing a state in which one end side of the pit lid supported by the pit lid support of FIG. 1 is lifted; FIG. 7 is an enlarged view showing the other end side of the pit lid in FIG. 6; FIG. 10 is a cross-sectional view showing a state in which one end side of the pit lid is lifted in the conventional art.

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on the illustrated embodiments.
1 to 7 show an embodiment of the present invention, and FIG. 1 is a plan view showing a pit cover support structure in which a pit cover support 1 according to this embodiment is arranged. The pit lid support 1 is a support that supports the pit lid 101 together with a support member (support portion) 111 provided in the cable pit (pit) P. As shown in FIG. First, the cable pit P and the pit lid 101 will be explained.

The cable pit P is a long groove with a substantially U-shaped cross section and an open top, in which cables for electric power and communication are laid and accommodated. Multiple are placed. In this embodiment, as shown in FIG. 3, a pit lid 101 made of a grating made of steel materials arranged in a grid pattern to enable visual inspection of the inside of the cable pit P, and a pit lid 101 made of FRP (Fiber Reinforced Plastic). An FRP lid (pit lid) 102 that prevents the inside of the cable pit P from being visually observed is arranged as follows. Here, only the pit lid 101 will be described, but the FRP lid 102 has the same arrangement structure.

That is, as shown in FIGS. 4 and 5, support members (receiving frames) 111 protruding from opposing side wall surfaces extending in the longitudinal direction of the cable pit P are arranged to face each other. The support member 111 is made of angle steel or steel plate, and has a flat upper surface. On the other hand, the pit lid 101 has a substantially rectangular planar shape, and on the lower surfaces of both ends (short sides) in the longitudinal direction, the height of the pit lid 101 can be adjusted and the pit lid 101 and the support member 111 can be directly connected. Support clogs 103 are provided to prevent corrosion due to contact. The width of the support clogs 103 (the length of the pit lid 101 in the longitudinal direction) and the width of the support member 111 (the amount of protrusion from the side wall surface of the cable pit P) are set to be approximately the same. By placing the support clogs 103 on the support member 111, the pit lid 101 is arranged and supported so that the upper surface of the pit lid 101 is substantially flush with the ground G.

In this embodiment, only the pit lid 101 arranged in this manner is subject to opening and closing during inspection (the FRP lid 102 is not subject), and the pit lid support 1 is disposed below the pit lid 101. be.

As shown in FIG. 2, the pit lid support 1 mainly includes two installation members (installation portions) 2, two adjacent members (adjacent portions) 3, and bolts (fastening members, regulation part) 4.

The installation member 2 is a rod-shaped member installed between the supporting members 111 facing each other, and is made of angle steel having a substantially L-shaped cross section. The length and thickness of the construction member 2 are set so as to obtain sufficient strength and rigidity to support the pit lid 101 when constructed between the support members 111 . In addition, the two bridging members 2 are arranged so that the internal corners (internal corners of the L-shape) face each other, and the arrangement interval is set so that the pit lid 101 can be arranged between the bridging members 2.

The adjacent member 3 is connected to the two installation members 2, and when the two installation members 2 are installed on the support member 111, it is adjacent to the support member 111 and flush with the support member 111. It is a member capable of supporting the pit lid 101 . That is, it is made of angle steel with a substantially L-shaped cross section, and its length is set to be the same length as the distance between the construction members 2, that is, it is set to be substantially the same length as the short side of the pit lid 101, and the thickness is set to , are set so as to sufficiently support the pit lid 101 .

Such two adjacent members 3 are arranged so as to connect the end sides of the two bridging members 2 and so that the internal corners (internal corners of the L-shape) face each other. Furthermore, as shown in FIGS. 1 and 6, in a state in which the two installation members 2 are installed on the support member 111, the adjacent member 3 is adjacent to the support member 111 without a gap, and the upper surface of the support member 111 and the adjacent member are adjacent to each other. The adjacent member 3 is arranged on the lower surface of the bridging member 2 so that the upper surface of the member 3 is flush. In other words, by installing the bridging member 2 on the support member 111, the corner side of the adjacent member 3 is connected to the free edge of the support member 111 over the entire length, and the upper surfaces of the support member 111 and the adjacent member 3 form an integral supporting surface. is formed.

Further, the bridging member 2 and the adjacent member 3 are formed with bolt insertion holes (not shown) in their overlapping portions. Then, as shown in FIG. 7, a bolt 4 is inserted into this bolt insertion hole, and a nut (fastening member) 5 is tightened on the bolt 4, whereby the bridging member 2 and the adjacent member 3 are fastened and connected. .

Further, the bolt 4 also serves as a restricting portion. That is, as shown in FIG. 6, when one end side (one short side) of the pit lid 101 positioned above the support member 111 is lifted, the other end side (the other side) of the pit lid 101 facing the one end side short side). Specifically, as shown in FIG. 7, when one end side of the pit lid 101 is lifted, the support clogs 103 (rotational fulcrum) on the other end side of the pit lid 101 come into contact with the head portion of the bolt 4 to provide support. It prevents the clogs 103 from moving inside the cable pit P. Here, in FIGS. 6 and 7, the adjacent member 3 is shown in a flat plate shape for the sake of simplicity and clarity.

The pit lid support 1 having such a configuration is placed and arranged on the support member 111, that is, the construction member 2 is constructed on the opposing support member 111 to form the pit lid support structure. ing. In such an arrangement state, the two bridging members 2 are in contact with the adjacent FRP lids 102, and the two adjacent members 3 are adjacent to the supporting member 111 and are flush with each other. Here, only by placing the pit lid support 1 on the support member 111, the pit lid support 1 can be removed freely, which hinders inspection and work in the cable pit P. It can be done without

As described above, according to the pit lid support 1 and the pit lid support structure, when the plurality of installation members 2 are installed on the support member 111, the adjacent member 3 is adjacent to the support member 111 and the support member It becomes flush with 111. That is, the pit lid 101 can be supported not only by the support member 111 but also by the adjacent member 3, and the support area for supporting the pit lid 101 is increased. Therefore, when one end side of the pit lid 101 is lifted to open the pit lid 101, the support clogs 103 on the other end side of the pit lid 101 are prevented from coming off from the support member 111 or the adjacent member 3, and the pit lid 101 can be opened. Dropping into the cable pit P can be prevented.

Moreover, when one end side of the pit lid 101 is lifted, the movement of the other end side of the pit lid 101 is restricted by the bolt 4, so that the other end side of the pit lid 101 is prevented from coming off the supporting member 111 or the adjacent member 3. This can be reliably prevented. As a result, it is possible to prevent the pit lid 101 from falling into the cable pit P more reliably. Furthermore, even if the other end side of the pit lid 101 is separated from the support member 111 and the adjacent member 3, the construction member 2 is constructed between the support members 111, so that the construction member 2 prevents the pit lid 101 from falling. becomes possible.

A bolt 4 that fastens the bridging member 2 and the adjacent member 3 constitutes a restricting portion. That is, since the bolt 4 also serves as a restricting portion, there is no need to provide a separate restricting portion, and a simple configuration and structure can be achieved.

Although the embodiment of the present invention has been described in detail above, the specific configuration is not limited to this embodiment. Included in the invention. For example, in the above embodiment, the support member 111 protruding from the side wall surface of the cable pit P is described as a support portion. There may be.

Moreover, although the case where the bridging member 2 and the adjacent member 3 are separate members has been described, the bridging portion and the adjacent portion may be integrally formed. Furthermore, three or more construction members 2 may be provided, and in this case, the construction member 2 positioned in the central portion of the cable pit P is flat. Also, although the case where the pit is the cable pit P has been described, it is of course applicable to other pits.

1 pit lid support 2 installation member (installation part)
3 Adjacent member (adjacent part)
4 bolt (fastening member, regulation part)
5 nut (fastening member)
101 pit lid 102 FRP lid (pit lid)
103 support clogs 111 support member (support part)
P Cable pit (pit)

Claims (3)

A support for a pit lid which has a substantially U-shaped cross-section and is provided with a support facing a pit with an upper opening, and supports a pit lid which closes the opening of the pit together with the support,
a plurality of bridging portions that are bridging the opposing support portions;
connected to the plurality of bridging portions, and when the plurality of bridging portions are mounted on the support portion, the support portion is adjacent to the support portion and is flush with the support portion so as to support the pit lid. an adjacency;
a restricting portion that restricts movement of the other end side of the pit lid facing the one end side when the one end side of the pit lid located above the support portion is lifted;
A support for a pit lid, comprising: The restricting portion is composed of a fastening member that fastens the bridging portion and the adjacent portion,
The pit lid support according to claim 1 , characterized in that: A support portion facing the pit having a substantially U-shaped cross section and an open top is provided, and the pit lid support according to claim 1 or 2 is disposed on the support portion,
A support structure for a pit lid, characterized by:

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