JP6544874B2 - Underground frame cover set - Google Patents

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to an undercarriage lid undercarriage set including a receiving frame defining an opening connected to an underground structure and a lid supported by the receiving frame to close the opening.

  At places where underground structures such as underground works such as sewers and water supplies, or underground burials and underground facilities in electricity, gas, communication, etc. are connected to the ground, there will be a frame that defines an opening that leads to the underground structure and that it will be supported by this frame There may be a case in which a lid receiving frame set for an underground structure provided with a lid closing the opening. On the inner peripheral side of the receiving frame, a frame-side tapered surface is provided on the inner peripheral side of the receiving structure, and the outer side is inclined on the outer side of the lid. It is known that a tapered surface is provided. Hereinafter, with respect to a direction perpendicular to the upper surface of the lid horizontal to the upper end surface of the receiving frame, an angle inclined to this direction may be referred to as an inclination angle. The frame-side tapered surface and the lid-side tapered surface are set to have substantially the same inclination angle and are in surface contact with each other, thereby performing a so-called taper fitting. When a load is applied to the lid, a wedge effect is obtained. The rattling of the lid can be suppressed. However, when a load is locally applied to the peripheral portion of the lid, the portion to which the load is applied drops while the portion opposite to the portion to which the load is applied is lifted. As a result, so-called slippage may occur in which the lid fits in a state where the lid is inclined with respect to the receiving frame. Here, if the inclination angle of the frame-side tapered surface and the inclination angle of the lid-side tapered surface are both reduced (if the frame-side tapered surface and the lid-side tapered surface are both steeply inclined), the wedge effect becomes large and the lid It is possible to suppress the rise. However, as the inclination angle between the frame side tapered surface and the lid side tapered surface is reduced, the lid body can easily bite into the receiving frame. As a result, when a load is applied to the lid, the force of the lid biting into the receiving frame becomes too strong, which makes it difficult to open the lid. For this reason, a receiving frame set for an underground structure has been proposed in which an attempt is made to restrain the lid from sliding up without increasing the force by which the lid bites into the receiving frame (see, for example, Patent Document 1 and Patent Document 2) ).

  An underground structure lid receiving frame set described in Patent Document 1 is provided with a plurality of fitting portions in which a part of the outer peripheral surface of the lid contacts a part of the inner peripheral surface of the receiving frame at an interval in the vertical direction It is That is, the upper fitting portion and the lower fitting portion located below the upper fitting portion are provided. In the lid receiving frame set for underground structures described in Patent Document 1, a part of the inner peripheral surface of the receiving frame and a part of the outer peripheral surface of the lid in both the upper fitting portion and the lower fitting portion Is trying to suppress the ascend of the lid by bringing the

  Moreover, the lid receiving frame set for underground structures described in patent document 2 forms a frame side upper taper surface in the upper part of the inner peripheral surface of a receiving frame, and a frame side lower taper surface in the lower part of the inner peripheral surface of a receiving frame. Form. Further, the upper corner of the lid on the outer peripheral surface of the lid is provided with an upper corner in line contact with the upper tapered surface on the frame side, and the lower tapered surface on the frame side is linearly contact with the lower tapered surface on the outer peripheral surface. The lower corner is provided. In the case of a lid receiving frame set for an underground structure described in Patent Document 2, when a load is applied to the lid, the inner peripheral side surface of the receiving frame is plastically deformed by the upper corner portion and the lower corner portion, thereby removing the lid I am trying to suppress the rise.

  However, the lid receiving frame set for underground structure described in Patent Document 1 has a part of the inner peripheral surface of the receiving frame and the outer peripheral surface of the outer frame in both the upper fitting portion and the lower fitting portion. It is necessary to make contact with the part, and high accuracy is required for the dimensions of the inner peripheral surface of the receiving frame and the outer peripheral surface of the outer frame. Moreover, also in the lid receiving frame set for underground structures described in patent document 2, when the upper corner part and lower corner part of a lid contact the inner skin of a receiving frame appropriately and load is applied to a lid In addition, in order to plastically deform the inner peripheral side surface of the receiving frame by the upper corner portion and the lower corner portion, the point that high dimensional accuracy is required is the same. Therefore, it is difficult to manufacture the lid receiving frame set for the underground structure described in Patent Document 1 and the lid receiving frame set for the underground structure described in Patent Document 2 as well.

Patent No. 5161148 gazette JP, 2013-7198, A

  By the way, it is also important to be able to open the lid easily when opening the lid.

  An object of the present invention is to provide a lid receiving frame set for an underground structure, in which the lid body can be easily opened when opening the lid.

According to another aspect of the present invention, there is provided an underground structure lid support frame set according to the present invention includes: a base frame defining an opening connected to the underground structure; and a lid body supported by the base frame to close the opening. In the lid support frame set,
The receiving frame is provided with a frame-side tapered surface that is inclined outward toward the upper side on the inner peripheral side, and has an abutted portion that is inclined outward toward the lower side than the frame-side tapered surface. ,
The lid is inclined outward as it goes upward, and a lid-side tapered surface fitted to the frame-side tapered surface is provided on the outer peripheral side, and a contact portion is connected to a lower end of the lid-side tapered surface. Yes,
The contact portion faces the abutted portion with a gap in the horizontal direction in a state in which the lid supported by the receiving frame is horizontal to the upper end surface of the receiving frame, and the contact portion When the lid tilts to a certain angle with respect to the upper end face, the lid abuts on the abutted portion and regulates that the lid is tilted more than the certain angle, and is similar to the abutted portion. all SANYO having an outer peripheral surface inclined continuously outwardly toward upward at a constant inclination angle,
The lid-side tapered surface is characterized in that it extends below the frame-side tapered surface .
Moreover, in the lid receiving frame set for underground structures of the present invention, the lid-side tapered surface may be continuously inclined at a constant inclination angle from the lower end to the upper end.

  Moreover, in the lid receiving frame set for underground structures of this invention, the inclination angle of the said abutted part may be an angle smaller than the inclination angle of the said frame side taper surface.

  Furthermore, the length toward the upper side of the abutted portion may be longer than the length toward the upper side of the frame-side tapered surface.

  According to the present invention, it is possible to provide a lid receiving frame set for an underground structure which can be easily opened when the lid is opened.

(A) is sectional drawing of the lid receiving frame set for underground structures which is one Embodiment of this invention, (b) is a top view of the lid receiving frame set for underground structures shown to (a). (A) is an enlarged view which expands and shows the A section of FIG. 1 (a), (b) is a figure which shows a mode that the manhole cover 2 shown to (a) inclines to a fixed angle. It is a figure for demonstrating a mode that a manhole cover slips down from the initial stage support state shown in FIG. It is a figure which shows the part corresponding to Fig.2 (a) in the 1st modification of a lid receiving frame set shown in FIGS. It is a figure which shows the part corresponding to Fig.2 (a) in the 2nd modification of a lid receiving frame set shown in FIGS. It is a figure which shows the aspect corresponding to FIG. 2 in the lid cradle set of 2nd Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  Fig.1 (a) is sectional drawing of one Embodiment of the lid receptacle frame set 10 for underground structures, FIG.1 (b) is a top view of the lid receptacle frame set 10 for underground structures shown to the figure (a). It is. Hereinafter, the lid receiving frame set 10 for underground structures is abbreviated to the lid receiving frame set 10. In addition, the cross-sectional view shown to Fig.1 (a) is AA sectional drawing of the figure (b). Moreover, in FIG. 1 (a), the ground G is shown and the ground G is abbreviate | omitted in the same figure (b).

  FIG. 1 shows a lid receiving frame set 10 including a manhole lid 2 corresponding to an embodiment of the lid and an annularly formed receiving frame 3 for supporting the manhole lid 2. The sewer drainage pipe, which is a buried object, is buried at a predetermined depth from the ground, and a manhole is provided as an underground facility in the middle of the sewer drainage pipe. The sewer drainage pipes and manholes also correspond to underground structures. The manhole is formed as a vertical hole from the sewer drainage pipe to the ground surface by a frame made up of prefabricated concrete molded products. The receiving frame 3 is provided on the top of the housing and defines an opening H leading to a manhole which is an underground structure.

  The manhole cover 2 is a circular one in a plan view which closes the opening H connected to a manhole which is an underground structure so as to open and close freely, and the manhole cover 2 shown in FIG. 1 closes the opening H. The manhole cover 2 shown in FIG. 1 is made of cast iron formed by casting. The manhole cover 2 may be made of iron other than cast iron, or may be made of metal other than iron. The manhole cover 2 includes a disk-like disk portion 21, an outer peripheral surface portion 22 provided on an outer peripheral portion of the disk portion 21, and a rib 23 which protrudes downward from the disk portion 21 and is arranged in a girder shape. The rib 23 is formed integrally with the disc portion 21 and the outer peripheral surface portion 22 when the manhole cover 2 is cast in order to increase the strength of the manhole cover 2. The outer peripheral surface portion 22 will be described in detail later.

  The receiving frame 3 is made of cast iron and formed by casting, and has a tubular shape having an inner peripheral surface portion 31 and an upper end surface 32 and having an annular shape in a plan view. The inner circumferential surface portion 31 will be described in detail later.

  In FIG. 1 (a), the upper side of the figure is the ground side, and the lower side of the figure is the underground side. In this embodiment, the aspect which installs the receiving frame 3 on the horizontal ground G is mentioned as an example, and is demonstrated. The upper end surface 32 of the receiving frame 3 is endless, and the upper end surface 32 of the receiving frame 3 is continuous with the ground G without any step. That is, the upper end surface 32 of the receiving frame 3 is adjusted to the same height position as the ground G when the receiving frame 3 is installed on the ground G. Further, FIG. 1 (a) shows an initial state in which the lid receiving frame set 10 is installed, and the manhole cover 2 supported by the receiving frame 3 is horizontal to the receiving frame 3 and on the receiving frame 3 A state in which the height position of the upper surface 21 a of the disk portion 21 corresponding to the upper surface of the manhole cover 2 matches the height position of the end surface 32 is shown. Hereinafter, the state of the manhole cover 2 supported by the receiving frame 3 shown in FIG. 1A may be referred to as an initial support state. In the present embodiment, as described above, since the receiving frame 3 is installed horizontally, the upper surface 21 a of the disk portion 21 also becomes horizontal. In FIG. 1, a hinge member that pivotally connects the manhole cover 2 to the receiving frame 3, a lock member that maintains the state in which the manhole cover 2 closes the opening H, and the like are omitted.

  Fig.2 (a) is an enlarged view which expands and shows the A section of Fig.1 (a).

  As shown to Fig.2 (a), the frame side taper surface 311, the abutted part 312, and the stop part 313 are provided in the description order in the internal peripheral surface part 31 of the receiving frame 3 from the ground G side to the underground side. . The frame-side tapered surface 311 is a tapered inner peripheral surface which is inclined outward as it goes upward and is connected to the upper end surface 32, and the inclination angle θ1 is set to about 5 to 12 degrees. In addition, in FIGS. 2 and 3 showing this embodiment and FIGS. 4 to 6 showing modifications and the second embodiment, the inclination is made larger than the actual inclination angle so that the inclined state can be easily understood. It shows a state of exaggeration. The abutted portion 312 is a cylindrical inner peripheral surface connected to the lower end portion of the frame-side tapered surface 311 and extending in a direction perpendicular to the line connecting the upper end surface 32 of the receiving frame 3. It is set to. In the present embodiment, since the receiving frame 3 is installed so that the line connecting the upper end surface 32 of the receiving frame 3 is horizontal, the abutted portion 312 extends in the vertical direction. Although it is also possible to adopt a mode in which the abutted portion 312 is also inclined outward as it goes upward as in the first modification described later, the abutted portion 312 may be inclined from the arrangement relationship with the abutted portion 222 described later. The inclination angle of the contact portion 312 is preferably smaller than the inclination angle of the frame-side tapered surface 311. The stopping portion 313 is a portion protruding in a ring shape from the lower position than the abutted portion 312 to the inside of the receiving frame 3. The stopping portions 313 do not necessarily have to be provided in a ring shape, and a plurality of the stopping portions 313 may be provided in the circumferential direction of the inner peripheral surface portion 31 with a predetermined interval being provided.

  A lid-side tapered surface 221 is provided on the outer peripheral surface portion 22 of the manhole lid 2, and an abutting portion 222 is provided below the lid-side tapered surface 221. The lid-side tapered surface 221 is a tapered outer peripheral surface which is inclined outward as it goes upward and is connected to the upper surface 21 a, and the inclination angle thereof is set to substantially the same θ1 as the frame-side tapered surface 311. Further, the lid-side tapered surface 221 is a surface whose length toward the upper side is longer than the length toward the upper side of the frame-side tapered surface 311. The contact portion 222 has a cylindrical outer peripheral surface 2221 formed of a cylindrical outer peripheral surface, and a corner 2222 provided at the lower end portion thereof. The cylindrical outer peripheral surface 2221 is an outer peripheral surface extending in a direction orthogonal to the upper surface 21 a of the manhole cover 2, and the inclination angle is set to 0 degrees.

  In the initial support state shown in FIG. 2A, as described above, the height position of the upper surface 21a of the manhole cover 2 coincides with the height position of the upper end surface 32 of the receiving frame 3. Further, the lid-side tapered surface 221 is in surface contact with substantially the entire surface of the frame-side tapered surface 311, and the frame-side tapered surface 311 and the lid-side tapered surface 221 are taper-fitted. As described above, since the length toward the upper side of the lid-side tapered surface 221 is longer than that of the frame-side tapered surface 311, the lower end side of the lid-side tapered surface 221 is a portion not in surface contact with the frame-side tapered surface 311 Is occurring. The contact portion 222 is opposite to the contact portion 312 with a horizontal gap C1. Further, the contact portion 222 is separated from the stop portion 313 of the receiving frame 3 in the vertical direction by opening a gap C2 in the vertical direction. In the initial support state, the gap C1 in the horizontal direction is set smaller than the gap C2 in the vertical direction.

  FIG.2 (b) has shown a mode that the manhole cover 2 shown to the figure (a) inclined to a fixed angle.

  When a load is locally applied to the peripheral portion of the manhole cover 2, the portion of the manhole cover 2 to which the load is applied is lowered, while the opposite side of the portion to which the load is applied is raised and the manhole cover 2 is inclined. In FIG. 2 (b), a load is locally applied to the right side peripheral portion of the manhole cover 2 which is not shown, and the left side portion of the manhole cover 2 is raised and the manhole cover 2 is inclined at a certain angle with respect to the receiving frame 3. It shows the situation. As shown in FIG. 2B, in a state where the manhole cover 2 is inclined at a predetermined angle with respect to the receiving frame 3, the corner 2222 of the abutting portion 222 of the manhole cover 2 contacts the abutted portion 312 of the receiving frame 3. ing. As a result, the manhole cover 2 is restricted from being inclined more than the predetermined angle shown in FIG. 2B, and it is possible to suppress the ascent of the manhole cover 2.

  Here, in the initial support state shown in FIG. 2A, a gap C1 in the horizontal direction between the abutting portion 222 and the abutted portion 312 and the abutting portion 222 Less strictness is required for the constant angle of abutment. For this reason, high dimensional accuracy is not required for the contact portion 222 and the contact portion 312, and the manufacture of the lid support frame set 10 is facilitated.

  FIG. 3 is a view for explaining how the manhole cover 2 slides down from the initial support state shown in FIG.

  When a load is repeatedly applied to the manhole cover 2, the manhole cover 2 is slipped from the receiving frame 3 from the initial support state shown in FIG. 2 as shown in FIG. The height position of the upper surface 21 a of the manhole cover 2 is lower than the height position of the upper end surface 32. In the state shown in FIG. 3A, for example, even when the gap C2 in the vertical direction is smaller than the gap C1 in the horizontal direction, a load is locally applied to the peripheral portion of the manhole cover 2 and the manhole cover 2 When inclined, the corner 2222 of the contact part 222 abuts on the abutted part 312 of the receiving frame 3. Thereby, it is possible to suppress the manhole cover 2 from rising.

  Furthermore, when the load is repeatedly applied to the manhole cover 2, the sliding down of the manhole cover 2 further advances, and as shown in FIG. 3B, the contact portion 222 abuts on the stop portion 313 in due course . Thereby, the sliding of the manhole cover 2 can be stopped. In addition, even in a state where the abutting portion 222 abuts on the stopping portion 313, a load is locally applied to the peripheral portion of the manhole cover 2, and when the manhole cover 2 is inclined, the corner portion 2222 in the abutting portion 222 Since it abuts on the abutted portion 312, rattling or the like of the manhole cover 2 can be suppressed.

  Next, modifications of the lid receiving frame set 10 described above will be described. In the following description of the modified example and the subsequent description of the second embodiment, differences from the lid receiving frame set 10 of the first embodiment shown in FIGS. 1 to 3 will be mainly described, and the configuration described so far The components having the same names as the names of the elements will be described with the reference numerals used so far, and overlapping descriptions may be omitted.

  FIG. 4: is a figure which shows the part corresponding to Fig.2 (a) in the 1st modification of the lid receptacle frame set 10 shown to FIGS. 1-3. In the lid receiving frame set 10 of the first modified example, the configurations of the abutted portion 312 of the receiving frame 3 and the lid-side tapered surface 221 and the contacting portion 222 in the manhole lid 2 are different from those in the embodiment described above.

  As shown in FIG. 4, the abutted portion 312 of the first modified example is, similarly to the frame-side tapered surface 311, formed of a tapered tapered surface that is inclined outward toward the upper side. However, the inclination angle θ2 of the abutted portion 312 is set smaller than the inclination angle θ1 of the frame-side tapered surface 311. The upward length of the lid-side tapered surface 221 of the manhole cover 2 is set to be substantially the same as the upward length of the frame-side tapered surface 311. A lower surface portion 223 extending to the center side of the manhole cover 2 is provided at the lower end portion of the lid side tapered surface 221, and a cylindrical outer peripheral surface 2221 is connected to the center side end portion of the lower surface portion 223. Similar to the lid-side tapered surface 221, the cylindrical outer peripheral surface 2221 is formed of a tapered tapered surface that is inclined outward toward the upper side. However, the inclination angle of the cylindrical outer peripheral surface 2221 is also set to θ2 smaller than the inclination angle θ1 of the lid-side tapered surface 221, similarly to the abutted portion 312. Thus, a horizontal gap C1 is provided between the abutted portion 312 and the cylindrical outer peripheral surface 2221 and between the abutted portion 312 and the corner portion 2222. The inclination angle of the cylindrical outer peripheral surface 2221 may be set to 0 degrees, as indicated by an alternate long and short dash line in FIG. 4.

  FIG. 5: is a figure which shows the part corresponding to Fig.2 (a) in the 2nd modification of the lid receptacle frame set 10 shown to FIGS. 1-3. In the lid receiving frame set 10 of the second modified example, the configurations of the lid-side tapered surface 221 and the contact portion 222 in the manhole lid 2 are different from those in the above-described embodiment.

  As shown in FIG. 5, similarly to the first modification shown in FIG. 4, the length of the lid-side tapered surface 221 of the manhole cover 2 directed upward is substantially the same as the length of the frame-side tapered surface 311 directed upward. It is set. Further, the contact portion 222 has a vertical wall 2223 extending downward from the lower surface 223 and a protrusion 2224 projecting outward from the lower end of the vertical wall 2223. A corner 2222 is provided at the lower end of the tip. In the second modification, a gap C1 in the horizontal direction is present between the end portion on the outer peripheral side of the ridge portion 2224 and the corner portion 2222 and the abutted portion 312, and the ridge portion 2224 and the stop portion 313 There is a gap C2 in the vertical direction between them. In this modification, in the initial support state shown in FIG. 5, the ridge 2224 and the stop 313 are in a horizontal posture to each other, but even if the ridge 2224 and the stop 313 are inclined to each other. You may employ | adopt the aspect which made only one incline only. In the second modification, when the manhole cover 2 is inclined to a certain angle, the corner 2222 abuts on the abutted part 312, and the manhole cover 2 is restricted from being inclined at a certain angle.

  Next, a second embodiment of the lid receiving frame set will be described.

  FIG. 6 is a view showing an aspect corresponding to FIG. 2 in the lid receiving frame set 11 of the second embodiment. In the lid receiving frame set 11 of the second embodiment, compared with the lid receiving frame set 10 of the first embodiment, the contact portion 222 is provided closer to the center side of the manhole lid 2 than the lid side tapered surface 221 The point that the part 312 is provided inside the receiving frame 3 rather than the frame side taper surface 311 is mainly different.

  As shown to Fig.6 (a), the frame side taper surface 311, the clearance gap formation part 314, the stop surface part 315, and to-be-contacted to the inner peripheral surface part 31 of the receiving frame 3 in 2nd Embodiment from the ground G side to the underground side. The contact portions 312 are provided in the order of description. In addition, in 2nd Embodiment, although the stop part 313 shown in FIG. 2 is not provided, you may provide a stop part below the to-be-contacted part 312. As shown in FIG. The gap forming portion 314 is a cylindrical inner peripheral surface extending in the vertical direction from the lower end portion of the frame-side tapered surface 311. The stop surface portion 315 is a surface extending from the lower end portion of the gap forming portion 314 to the inside (right side in the drawing) of the receiving frame 3. The abutted portion 312 is connected to the inner end of the stop surface portion 315. That is, the abutted portion 312 is provided on the inner side of the receiving frame 3 than the frame-side tapered surface 311.

  A lower surface portion 223 extending from the lower end portion of the lid side tapered surface 221 to the center side of the manhole lid 2 is provided between the lid side tapered surface 221 and the contact portion 222 in the manhole lid 2. That is, the contact portion 222 is provided closer to the center side of the manhole cover 2 than the cover-side tapered surface 221.

  FIG. 6A shows the initial support state in which the height position of the upper surface 21 a of the manhole cover 2 matches the height position of the upper end surface 32 of the receiving frame 3. In the initial support state, the stop surface portion 315 and the lower surface portion 223 are separated with a vertical clearance C3 and the contact portion 222 and the abutted portion 312 are separated with a horizontal clearance C1. doing. The clearance C3 in the vertical direction is set larger than the clearance C1 in the horizontal direction. In the initial support state, the lower surface portion 223 and the stop surface portion 315 face each other horizontally, but the lower surface portion 223 and the stop surface portion 315 may both be opposed in an inclined state, and only one of them is opposed. May be inclined. For example, the lower surface portion 223 may be inclined downward toward the center side of the manhole cover 2.

  As shown in FIG. 6B, in the lid reception frame set 11 of the second embodiment, when the manhole cover 2 is inclined to a certain angle, the corner portion 2222 abuts on the abutted portion 312, and the manhole cover 2 is constant. It is regulated that it inclines rather than an angle. Here, the contact portion 222 in the second embodiment is provided closer to the center of the manhole cover 2 than the cover-side tapered surface 221 by the length of the lower surface portion 223, and the abutted portion 312 is the stop surface portion 315. It is provided on the inner side of the receiving frame 3 than the frame-side tapered surface 311 by the length. For this reason, as compared with the lid receiving frame set 10 of the first embodiment, it is possible to further suppress the ascension of the manhole lid 2. In addition, when the manhole cover 2 slides down with respect to the receiving frame 3 as the date and time elapses, the lower surface portion 223 abuts on the stop surface portion 315, whereby the sliding down of the manhole cover 2 can be stopped.

  According to the lid receiving frame sets 10 and 11 described above, it is possible to suppress the sliding of the lid without requiring high dimensional accuracy.

  The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the claims. For example, in the above embodiment, the aspect in which the lid receiving frame sets 10 and 11 are installed at a place where the ground G is horizontal is described as an example, but the lid receiving frame sets 10 and 11 are installed at places where the ground G is inclined. It is also good.

  In addition, even if it is the component contained only in each description of each embodiment or each modification demonstrated above, the component may be applied to another embodiment or another modification.

In addition, the above-described cover structure set for underground structure is provided for the underground structure including a frame that defines an opening that leads to the underground structure, and a lid that closes the opening by being supported by the frame. In the lid receiving frame set,
The receiving frame is provided with a frame-side tapered surface that is inclined outward toward the upper side on the inner peripheral side, and has an abutted portion below the frame-side tapered surface,
The lid body is inclined outward as it goes upward, and a lid-side tapered surface fitted on the frame-side tapered surface is provided on the outer peripheral side, and a contact portion provided below the lid-side tapered surface , And a rib projecting downward from the back surface to the top surface,
The rib is connected to the contact portion,
The contact portion faces the abutted portion with a gap in the horizontal direction in a state in which the lid supported by the receiving frame is horizontal to the upper end surface of the receiving frame, and the contact portion When the lid tilts to a certain angle with respect to the upper end face, the lid abuts on the abutted portion and regulates that the lid is tilted more than the certain angle, and is lower than the connection point of the rib It may be characterized in that it is protruded.

Further, in this underground structure lid receiving frame set, the receiving frame has a stop portion projecting inward below the abutted portion, and a thickness below the stop portion thicker than above the stop portion. And an extending portion,
The stop portion is spaced downward by a predetermined distance from the contact portion of the lid in a state where the height position of the upper surface of the lid matches the height position of the upper end surface of the receiving frame. The contact portion abuts when the height position of the upper surface of the lid is lower than the height position of the upper end surface of the receiving frame, and the height position of the upper surface of the lid is It may be regulated to be lower than that.

Further, in an underground structure lid case set including a receiving frame which defines an opening connected to the underground structure, and a lid which is supported by the receiving frame to close the opening,
The receiving frame is provided with a frame-side tapered surface that is inclined outward toward the upper side on the inner peripheral side, and has an abutted portion below the frame-side tapered surface,
The lid is inclined outward as it goes upward, and a lid-side tapered surface fitted to the frame-side tapered surface is provided on the outer peripheral side, and has a contact portion below the lid-side tapered surface. Yes,
The contact portion faces the abutted portion with a gap in the horizontal direction in a state in which the lid supported by the receiving frame is horizontal to the upper end surface of the receiving frame, and the contact portion An underground structure lid characterized in that when the lid body is tilted to a certain angle with respect to the upper end face, the lid abuts on the abutted portion and regulates that the lid body is tilted more than the certain angle. It may be a receipt set.

  Here, the lid may have a round shape (circular shape in plan view) or a rectangular shape (rectangular shape in plan view). Further, the horizontal direction refers to an outer / inner direction, and, for example, when the lid is round, the horizontal direction corresponds to a radial direction. The frame-side tapered surface may be provided on the entire surface of the inner periphery of the lid, or may be provided on a part of the inner periphery. For example, the frame side tapered surface may be provided at predetermined intervals in the circumferential direction of the inner periphery. Furthermore, the inclination angle of the frame-side tapered surface and the inclination angle of the lid-side tapered surface may be the same. In this case, the frame-side tapered surface and the lid-side tapered surface are so-called tapered fitting. Further, the abutted portion may have a tapered tapered surface having a smaller inclination angle than the frame-side tapered surface. Furthermore, the frame-side tapered surface and the abutted portion may be continuous, or another portion may be interposed between the frame-side tapered surface and the abutted portion. Further, the contact portion has a circumferential surface facing substantially parallel to the contact portion in a state where the lid supported by the receiving frame is horizontal to the upper end surface of the receiving frame. The peripheral surface may be a tapered surface having a smaller inclination angle than the lid-side tapered surface. The circumferential surface may be continuous with the lid-side tapered surface, or another portion may be interposed between the circumferential surface and the lid-side tapered surface. This other portion is a portion not in contact with the abutted portion even if the lid is inclined from the state of being horizontally supported with respect to the upper end surface of the receiving frame. Furthermore, in a state where the lid is horizontally supported with respect to the upper end surface of the receiving frame, the contact portion may have a projection or a protrusion protruding toward the abutted portion. Preferably, the abutted portion may have a protrusion or a protrusion protruding toward the abutted portion.

  According to the underground structure lid receiving frame set, when the lid body is inclined to the predetermined angle with respect to the upper end surface of the receiving frame, the contact portion contacts the abutted portion and the lid body is fixed It is regulated that it inclines rather than an angle. As a result, it is possible to suppress the sliding of the lid. Further, in a state where the lid is supported horizontally to the upper end face of the receiving frame, the contact portion does not contact the abutted portion, and a gap is formed in the horizontal direction of the lid. . Furthermore, when the lid tilts, it is sufficient that the contact portion contacts the abutted portion as long as the lid does not slide up, so that the fixed angle does not have to be defined by pinpoint, It should be within a certain range. For these reasons, high precision is not required for the dimensions of the abutting portion and the abutted portion, and the manufacturing becomes easy. In addition, the force which the said cover body bites into the said receiving frame can also be adjusted by adjusting the inclination angle of the said frame side taper surface and the said cover side taper surface. Further, the frame side taper surface and the lid side taper surface may form a relationship to form an upper fitting portion and a lower fitting portion as shown in the above-mentioned Patent Document 1, or may occur by accident. Although it is good, this underground structure lid support frame set is easy to manufacture because it can suppress the ascend of the lid without relying on this relationship.

Further, the receiving frame has a stop portion projecting inward below the abutted portion, and
The stop portion may be spaced downward with respect to the contact portion of the lid in a state in which the height position of the upper surface of the lid matches the height position of the upper end surface of the receiving frame. Good.

  By doing this, the so-called contact drop occurs when the entire lid body is lowered from the state where the height position of the upper surface of the lid body coincides with the height position of the upper end face of the receiving frame. The sliding can be stopped by contacting the stop.

Moreover, in the lid receiving frame set for underground structures, the contact portion is provided closer to the center of the lid than the lid-side tapered surface,
The lid has a lower surface portion between the lid-side tapered surface and the contact portion,
The abutted portion is provided on the inner side of the receiving frame than the frame-side tapered surface,
The receiving frame has a stop surface portion between the frame-side tapered surface and the abutted portion,
The stop surface portion may be spaced downward with respect to the lower surface portion of the lid in a state where the height position of the upper surface of the lid matches the height position of the upper end surface of the receiving frame. .

  The contact portion is provided closer to the center of the lid than the lid-side tapered surface, and the contact portion is provided inside the receiving frame than the frame-side tapered surface. When the contact portion provided on the center side of the lid abuts on the abutted portion provided on the inner side of the receiving frame, it is possible to further suppress the lid from sliding up. Further, the sliding of the lid can be stopped by the lower surface portion contacting the stop surface portion.

10, 11 Lid Receiving Frame Set 2 Manhole Lid 21a Upper surface 221 Lid side tapered surface 222 Contact part 223 Lower part 3 Receiving frame 311 Frame side tapered surface 312 Abutment part 313 Stop part 315 Stop surface part C1, C2, C3 Clearance H opening

Claims (4)

An underground structure lid case set comprising: a frame defining an opening connected to the underground structure; and a lid supported by the frame to close the opening.
The receiving frame is provided with a frame-side tapered surface that is inclined outward toward the upper side on the inner peripheral side, and has an abutted portion that is inclined outward toward the lower side than the frame-side tapered surface. ,
The lid is inclined outward as it goes upward, and a lid-side tapered surface fitted to the frame-side tapered surface is provided on the outer peripheral side, and a contact portion is connected to a lower end of the lid-side tapered surface. Yes,
The contact portion faces the abutted portion with a gap in the horizontal direction in a state in which the lid supported by the receiving frame is horizontal to the upper end surface of the receiving frame, and the contact portion When the lid tilts to a certain angle with respect to the upper end face, the lid abuts on the abutted portion and regulates that the lid is tilted more than the certain angle, and is similar to the abutted portion. all SANYO having an outer peripheral surface inclined continuously outwardly toward upward at a constant inclination angle,
The lid receiving frame set for an underground structure, wherein the lid-side tapered surface extends below the frame-side tapered surface . The set according to claim 1, wherein the lid-side tapered surface is continuously inclined at a constant inclination angle from the lower end to the upper end . The lid receiving frame set for an underground structure according to claim 1 or 2 , wherein the inclination angle of the abutted portion is smaller than the inclination angle of the frame-side tapered surface .   4. The lid support frame for underground structure according to claim 1, wherein a length of the abutted portion directed upward is longer than a length directed upward of the frame-side tapered surface. set.

Images