JP3626731B2 - Open / close lid - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is, for example, a vertical hole provided with a fire hydrant connected to a water pipe buried underground, or a vertical hole such as a manhole for inspecting and repairing the water pipe, sewer pipe, power telephone communication pipe or gas pipe. It is related with the opening-and-closing lid | cover which is arrange | positioned by facing the earth surface in the upper part, and can be opened with a bar (lever bar) as needed.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as the above-described opening / closing lid, one having a receiving frame having a rectangular opening and a lid main body for closing the opening of the receiving frame is known. Such an opening / closing lid is often arranged on a road through which a vehicle or the like passes. Therefore, a heavy iron is used for the lid body, and a bar is used for opening / closing the lid. Is generally disposed at the central part of the long side or the central part of the short side of the lid body or both. Further, the inner side surface of the opening of the receiving frame into which the opening / closing lid is dropped and the outer side surface of the opening / closing lid are formed in opposite tapered shapes.
[0003]
[Problems to be solved by the invention]
However, in the above-described conventional open / close lid, even if the bar is inserted into the bar insertion hole of the lid main body to open the lid main body, it may be difficult to open. That is, an opening / closing lid bites into the opening of the receiving frame in a state where the tapered surfaces are in pressure contact with each other, or dust or the like enters between the opening of the receiving frame and the opening / closing lid, and the frictional force is increased by such biting or dust. In addition to this, a reinforcing rib is formed, for example, in the shape of a cross-girder on the back side of the lid body on which a heavy object is placed, and the central part of the long side or the central part of the short side is difficult to deform.
[0004]
The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide an open / close lid that can easily open the lid body.
[0005]
[Means for Solving the Problems]
The opening / closing lid of the present invention is provided on the upper surface of a vertical hole formed under the ground so as to face the ground surface, and has a substantially rectangular opening, and both corners of one long side are formed as R portions. And closes the opening of the receiving frame, is formed in a substantially rectangular shape, and both corners on one long side corresponding to the R portion of the receiving frame are formed as R portions, and each R portion has respective curvatures. A lid body provided with a bar insertion hole in a direction toward the center,
Connecting means for connecting the other long side of the lid main body and the corresponding portion of the receiving frame so that the one long side of the lid main body can be opened and closed, on both sides of the burl insertion hole, The burl guide wall protruding to the back side of the lid body is formed along the burl insertion hole in the same direction as the burl insertion hole toward the vicinity of the center of curvature.
[0006]
In the opening / closing lid of the present invention, since the bar insertion hole is provided in the R portion of one long side corner of the lid body having a substantially rectangular shape, that is, the corner is easily deformed, When the force is applied, the corner of the lid body is deformed and is easily pushed up against the frictional force, and therefore the lid body can be easily opened. In addition, since the burl insertion hole is provided in a direction toward the vicinity of the center of curvature of the R portion, the distance from the position where the lid body is pushed up by the burl to the long side, and the distance to the short side are almost the same. As a result, a substantially equal push-up force can be applied to the long side and the short side connected to the R portion, and the resistance caused by the frictional force at the far side is increased when the side is close to the long side or the short side. It is possible to eliminate the situation where a stable push-up force cannot be applied.
[0007]
Further, each of both sides of the bar insertion holes, bar guide wall projecting on the rear side of the lid body along the bar insertion hole is formed in the bar insertion holes in the same direction toward the vicinity of the center of curvature by, and thus capable of guiding the bar insertion by matching the insertion direction of the bar in the desired direction.
[0008]
Further, in the opening / closing lid of the present invention, the lid body has a fitting portion that protrudes toward the back side and is connected to the burl guide wall at a periphery other than the portion where the connecting means is provided and the burl insertion hole. The outer surface of the portion is formed in a taper shape with the upper side protruding outward from the lower side, and the receiving frame has an inner surface that receives the fitting portion along the opening, and the inner surface is connected to the outer surface. Can be configured to have a reverse taper shape.
[0009]
In this configuration, the adhesion between the fitting portion of the lid main body and the inner side surface of the receiving frame is high, and dust or the like can hardly enter. On the other hand, the tapered surfaces are strongly pressed against each other to increase the frictional resistance, but even in such a fitting state, the lid body can be easily opened by prying the corners of the lid body with a bar as described above. Can be opened.
[0010]
In the opening / closing lid of the present invention, one or more first reinforcing ribs protrude from the back side of the lid main body substantially parallel to the long side, intersect the first reinforcing rib, and substantially parallel to the short side. It can be set as the structure by which the 2nd reinforcement rib protruded.
[0011]
In this configuration, since there is no reinforcing rib at the corner of the lid body, it is possible to ensure deformation due to the bar.
[0012]
In the opening / closing lid of the present invention, a handle for lifting the lid main body is provided at the center of one long side of the lid main body, and the bar insertion hole swings as the bar is inserted. A swing lid that opens and closes the burl insertion hole may be provided.
[0013]
In this configuration, since the handle and the burl insertion hole are arranged at positions separated from each other, when both the handle and the burl insertion hole are provided at the central portion of the long side, the tip of the burl functions as the handle. Can be prevented, and stable insertion of the bar becomes possible. Further, although the burl insertion hole is closed by the swinging lid, the swinging lid can be swung so that there is no hindrance to the insertion of the bar.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be specifically described below.
[0015]
FIG. 1 is a front cross-sectional view showing an opening / closing lid according to an embodiment of the present invention (the lid body and connecting means are omitted), FIG. 2 is a plan view showing the opening / closing lid, and FIG. 3 is a receiving frame provided in the opening / closing lid. 4 is a plan view showing a lid body provided in the opening / closing lid, FIG. 5 is a sectional view taken along line AA in FIG. 4, and FIG. 6 is a sectional view taken along line BB in FIG. 7 is a bottom view showing the lid main body, and FIG. 8 is a front sectional view showing the vicinity of the attachment portion of the handle. FIG. 9 is a view showing the connecting means, in which (a) shows a state where the lid body is opened, and (b) shows a state where the lid body is closed.
[0016]
In this embodiment, the opening / closing lid 1 is provided at a location where a fire hydrant is disposed, and a receiving frame 10 having an opening 11 (see FIG. 3), and a lid main body 20 closing the opening 11 of the receiving frame 10 (see FIG. 2). ) And connecting means 40 (see FIG. 9) for connecting the lid body 20 to the receiving frame 10 so as to be openable and closable.
[0017]
The receiving frame 10 is provided on the upper surface 3 of the vertical hole 2 formed below the ground so as to face the ground surface (see FIG. 1), and the opening 11 is formed in a substantially rectangular shape having R portions 12 at four corners (FIG. 3). reference).
[0018]
The lid body 20 closes the opening 11 of the receiving frame 10, and is formed in a substantially rectangular shape with four corners having R portions 21a, 21b, 21c, and 21d as shown in FIG. 4, and both Rs on one long side 22 side. A bar insertion hole 23 is provided at the center of each of the portions 21a and 21b in a direction toward the vicinity of the respective curvature centers 22a and 22b. A handle attachment portion 26 is provided at the center of the one long side 22. As shown in FIG. 8, the handle mounting portion 26 has two through holes 26 a and 26 b, and the two through holes 26 a and 26 b have a “U” shape for lifting the lid body 20. The handle 30 is attached by inserting both end portions from above and fixing the penetrating portion with the nut 31.
[0019]
Further, as shown in FIGS. 5 to 7, a fitting portion 24 protruding to the back side is disposed on the periphery of the lid main body 20 except for the portion 25 where the connecting means 40 is provided and the bar insertion hole 23. The outer surface 24a of the fitting portion 24 is formed in a taper shape with the upper side protruding outward than the lower side. On the other hand, the receiving frame 10 has an inner side surface 13 that receives the fitting portion 24 along the opening 11 as shown in FIG. 1, and the inner side surface 13 is formed in a tapered shape opposite to the outer side surface 24a. ing.
[0020]
Further, on the back side of the lid main body 20, bar guide walls 24 a and 24 b projecting to the back side are formed on both sides of the bar insertion hole 23 as shown in FIGS. 6 and 7. A fitting portion 24 is connected to the burl guide walls 24a and 24b. In addition, two first reinforcing ribs 25a and 25b are formed on the back side of the lid body 20 so as to be parallel to the long side, intersect with the first reinforcing ribs 25a and 25b, and two parallel to the short side. Second reinforcing ribs 26a and 26b are formed to protrude. Both ends of the first reinforcing ribs 25 a and 25 b and the second reinforcing ribs 26 a and 26 b are connected to the fitting portion 24.
[0021]
The bar insertion hole 23 described above is provided with a rocking lid 27 shown in FIG. As shown in FIG. 11 {(a) is a front view, (b) is a right side view}, the swing lid 27 is provided with a lid portion 27a at the top and two shaft portions serving as swing support points. 27b is provided on both sides, and a weight 27c is provided on the lower side. When a bar (not shown) is inserted into the bar insertion hole 23, the cover 27a shakes the shaft 27b against the gravity of the weight 27c. When the bar (not shown) is removed by swinging in the A direction as a moving fulcrum, the lid 27a swings in the B direction by the weight 27c and closes the bar insertion hole 23. The swing lid 27 is attached through the shaft portion 27b from the opening portion 23a provided as shown in FIGS. 12B and 10 showing the back side of the R portion 21a (21b) in FIG. This is done by setting the shaft portion 27b on the bearings 23b provided on both sides of the opening 23a.
[0022]
As shown in FIG. 9, the connecting means 40 opens and closes the other long side 28 side of the lid body 20 and the portion 14 corresponding to the long side 28 of the receiving frame 10 on the one long side 22 side of the lid body 20. It connects as possible, and includes a rod-shaped member 41, two lateral grooves 42 provided in the lid body 20, and a retaining piece 43 having a retaining hole 43a provided in the receiving frame 10.
[0023]
As shown in FIG. 13, the rod-like member 41 has shaft portions 41a and 41b protruding on both sides at the upper portion, a barrel portion 41c on the lower side, and a bolt passage hole 41d on the lower portion. Yes.
[0024]
FIG. 14A is a cross-sectional view taken along the line CC in FIG. 4 and shows one of the lateral grooves 42. FIG. 14B is a view of the lateral groove 42 viewed from the back side, and FIG. 14C is a view of the lateral groove 42 viewed from the right side. The lateral grooves 42 are formed on both sides of the opening 42a for allowing the body portion 41c to pass through on the back side of the lid body 20, and the right lateral groove 42a in FIG. 14C supports the shaft portion 41a of the rod-shaped member 41. The left lateral groove 42 b supports the shaft portion 41 b of the rod-shaped member 41. The shaft portions 41a and 41b are inserted through insertion openings 42c and 42d provided on both sides of the opening 42a at the left end of the opening 42a as shown in FIGS. 14 (a) and 14 (b). It is located in the recessed parts 42e and 42f formed in the inner back of 42b.
[0025]
Further, as shown in FIG. 9, the rod-like member 41 has its bolt through hole 41d passed through the retaining hole 43a of the retaining piece 43 downward from the upper side, and then a bolt 41e is attached to the bolt through hole 41d. The lid body 20 and the receiving frame 10 are attached in a retaining state. Therefore, the connecting means 40 can change the lid body 20 shown in FIG. 9A from the closed state to the opened state shown in FIG. 9B, and the lid can be opened even in such an open state. The main body 20 is prevented from leaving the receiving frame 10.
[0026]
Therefore, in the case of the opening / closing lid of the present embodiment, the burl insertion hole 23 is provided in the R portions 21a and 21b at the corners of the one long side 22 of the lid body 20 having a substantially rectangular shape, that is, in a place where deformation is easy. Therefore, when an upward force is applied by the bar, the corner of the lid main body 20 is deformed and resists the frictional force caused by dust or the like entering between the opening 11 of the receiving frame 10 and the lid main body 20. The lid body 20 can be easily opened, and therefore the lid body 20 can be easily opened. Further, since the burl insertion hole 23 is provided in the direction toward the vicinity of the curvature centers 22a and 22b of the R portions 21a and 21b, similarly to the distance from the position where the lid body 20 is pushed up by the burl to the long side, The distance to the short side becomes almost the same, and thereby, it is possible to apply a substantially equal pushing force to the long side 22 and the short side connected to the R portions 21a and 21b. In such a case, it is possible to eliminate a situation in which it is impossible to apply a stable push-up force due to a large resistance due to the frictional force of the far side.
[0027]
Here, the vicinity of the center of curvature as the direction in which the burl insertion hole is directed is within a region in which substantially the same pushing force can be applied to the long side and the short side near the R portion where the burl insertion hole is provided. It may be sufficient, and it is determined empirically although it varies depending on the rectangular shape of the lid body or the partial weight distribution.
[0028]
In the present embodiment, the bar guide walls 24a and 24b projecting from the back side of the lid main body 20 are formed on both sides of the bar insertion hole 23, so that the bar guide walls 24a and 24b extend in a desired direction along the bar guide wall. The insertion direction of the bar can be matched to guide the insertion of the bar.
[0029]
Further, in the present embodiment, the outer surface 24a of the fitting portion 24 of the lid body 20 is formed in a tapered shape with the upper side projecting outward from the lower side, and the inner side surface 13 of the receiving frame 10 is formed with the outer surface 24a. Is formed in a reverse taper shape, the adhesiveness between the outer side surface 24a of the lid body 20 and the inner side surface 13 of the receiving frame 10 is high, and dust or the like can hardly enter between them. On the other hand, the tapered surfaces are strongly pressed against each other to increase the frictional resistance, but even in such a fitting state, the lid body can be easily opened by prying the corners of the lid body with a bar as described above. Can be opened.
[0030]
In the present embodiment, two first reinforcing ribs 25a and 25b are formed on the back side of the lid body 20 so as to be parallel to the long side, and intersect with the first reinforcing ribs 25a and 25b to be parallel to the short side. Further, since the second reinforcing ribs 26a and 26b are formed so as to protrude, there is no reinforcing rib at the corner of the lid main body 20, so that deformation due to the bar can be ensured. However, the first reinforcing ribs 25a and 25b do not need to be completely parallel to the long sides, and may be substantially parallel with a slight inclination. Further, the second reinforcing ribs 26a and 26b do not have to be completely parallel to the short side, and may be substantially parallel with a slight inclination.
[0031]
Moreover, in this embodiment, since the handle 30 for lifting the lid main body 20 is provided in the center part of one long side 22 of the lid main body 20, the handle 30 and the burl insertion hole 23 are in the position away from each other. Therefore, when both the handle and the bar insertion hole are provided at the center of the long side, it is possible to prevent the tip of the bar from being placed on the handle, and stable bar insertion can be performed. Further, the burl insertion hole 23 is provided with a swing lid 27 that swings with the insertion of the burl to open and close the burl insertion hole 23, so that the burl insertion hole 23 is closed by the swing lid 27. However, since the swing lid 27 can swing, there is no hindrance to the insertion of the bar.
[0032]
In the above-described embodiment, the curvature radius of the R portion where the burl insertion hole is provided is not clarified at all. However, the radius may be larger than the width of the burr insertion hole.
[0033]
Further, in the above-described embodiment, the four corners of the substantially rectangular opening of the receiving frame are used as the R portion, and the four corners of the substantially rectangular lid body are used as the R portion. However, the present invention is not limited to this. In addition, both the opening of the receiving frame and the lid body can be similarly applied to those in which the corners on the long side of at least one (opening side) are R portions.
[0034]
In the above-described embodiment, two first reinforcing ribs and two second reinforcing ribs are provided. However, the present invention is not limited to this, and one or three or more first reinforcing ribs are provided along the long side. Alternatively, one or more second reinforcing ribs may be provided along the short side.
[0035]
Moreover, although the case where an open / close lid is provided at a place where a fire hydrant is arranged is given as an example in the above-described embodiment, the open / close lid of the present invention is not limited to this, and a water supply pipe, a sewer pipe, an electric power buried in the basement The present invention can be similarly applied to an upper portion of a vertical hole such as a manhole for inspecting and repairing a telephone communication pipe or a gas pipe. Further, the present invention can be similarly applied to all opening / closing lids having a size and weight that can be opened by a bar.
[0036]
【The invention's effect】
As described in detail above, in the case of the opening / closing lid of the present invention, a bar insertion hole is provided at the R portion of one long side corner of the lid body having a substantially rectangular shape, that is, the corner is easily deformed. Therefore, when an upward force is applied by the bar, the corner of the lid main body is deformed and easily pushed up against the frictional force, and therefore the lid main body can be easily opened. In addition, since the burl insertion hole is provided in a direction toward the vicinity of the center of curvature of the R portion, the distance from the position where the lid body is pushed up by the burl to the long side, and the distance to the short side are almost the same. As a result, a substantially equal push-up force can be applied to the long side and the short side connected to the R portion, and the resistance caused by the frictional force at the far side is increased when the side is close to the long side or the short side. It is possible to eliminate the situation where a stable push-up force cannot be applied.
[Brief description of the drawings]
FIG. 1 is a front sectional view showing a lid for opening and closing according to an embodiment of the present invention (a lid body and connecting means are omitted).
FIG. 2 is a plan view showing an opening / closing lid according to an embodiment of the present invention.
3 is a plan view showing a receiving frame provided in the opening / closing lid of FIG. 1. FIG.
4 is a plan view showing a lid body provided in the opening / closing lid of FIG. 1. FIG.
5 is a cross-sectional view taken along line AA in FIG.
6 is a cross-sectional view taken along line BB in FIG.
FIG. 7 is a bottom view showing a lid body.
FIG. 8 is a front sectional view showing the vicinity of a handle attachment portion.
FIGS. 9A and 9B are diagrams showing connecting means, where FIG. 9A shows a state in which the lid body is opened, and FIG. 9B shows a state in which the lid body is closed.
FIG. 10 is a front view showing an attached state of the swing lid.
11A is a front view showing a swinging lid, and FIG. 11B is a right side view thereof.
12A is a plan view showing the vicinity of a burl insertion hole of the lid body, and FIG. 12B is a rear view thereof.
FIG. 13A is a front view showing a rod-like member constituting the connecting means, and FIG. 13B is a right side view thereof.
14A is a cross-sectional view taken along the line CC of FIG. 4, showing one of the lateral grooves, FIG. 14B is a view of the lateral groove portion viewed from the back side, and FIG. 14C is the right side of the lateral groove portion. It is the figure seen from the surface side.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Receiving frame 11 Opening 13 Inner side surface 20 Cover main body 21a, 21b R part 22 One long side 22a, 22b Center of curvature 23 Bar insertion hole 24 Fitting part 24a Outer side surface 24a, 24b Bar guide wall 25a, 25b 1st reinforcement rib 26a 26b Second reinforcing rib 27 Oscillating lid 30 Handle 40 Connecting means 41 Bar-shaped member 42 Horizontal groove 43 Retaining piece

Claims (4)

A receiving frame that is provided on the upper surface of a vertical hole formed under the ground so as to face the ground surface, has a substantially rectangular opening, and both corners of one long side are formed as R portions;
It closes the opening of the receiving frame, is formed in a substantially rectangular shape, and both long corners corresponding to the R portion of the receiving frame are formed as R portions. a lid body bar insertion hole is provided in the direction towards the,
A connecting means for connecting the other long side of the lid body and the corresponding part of the receiving frame so that the one long side of the lid body can be opened and closed ;
On both sides of each of the upper Symbol bar insertion hole, the bar guide wall projecting on the rear side of the lid body along the bar insertion hole is formed in the bar insertion holes in the same direction toward the vicinity of the center of curvature Opening and closing lid characterized by. The lid body has a fitting portion that protrudes toward the back side and is connected to the burl guide wall on the periphery other than the portion where the connecting means is provided and the burl insertion hole, and the outer surface of the fitting portion is lower than the lower side. The upper side is formed in a taper shape protruding outward, the receiving frame has an inner surface that receives the fitting portion along the opening, and the inner surface is formed in a taper shape opposite to the outer surface. lid according to claim 1, characterized in that there. One or more first reinforcing ribs protrude from the back side of the lid main body substantially parallel to the long side, and the second reinforcing rib protrudes substantially parallel to the short side intersecting the first reinforcing rib. The opening / closing lid according to claim 1 , wherein the opening / closing lid is provided. A handle for lifting the lid body is provided at the center of one long side of the lid body, and the bur insertion hole swings with the insertion of the bur to swing to open and close the bur insertion hole. The lid according to any one of claims 1 to 3, wherein a lid is provided.

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