JP4593371B2 - Rectangular manhole - Google Patents

Description

  The present invention relates to a rectangular manhole installed on a road or the like, and more specifically, a three-piece lid is attached to and detached from a receiving frame formed in a rectangular shape by a pair of opposing long sides and a pair of short sides. It relates to a rectangular manhole.

  A common groove that accommodates electric wires, gas pipes, and other lifelines together in the ground communicates with the ground via a rectangular manhole. As shown in FIG. 5, the rectangular manhole includes a rectangular receiving frame 110 provided with an opening 1 and a lid 120 attached to and detached from the receiving frame 110.

  The receiving frame 110 is formed in a rectangular shape in which a pair of long sides and a pair of short sides are opposed to each other by a wall-like portion 111 in a vertical posture. The long side of the receiving frame 110 is at least twice as long as the short side so that even if the lifeline is hard and long like a gas pipe, it can be easily carried into the common groove. Yes.

  A support portion 112 that supports the lid 120 is provided inside the wall-like portion 111. The support portion 112 includes a tapered surface 113 that is inclined upward at a slight angle inside the wall-shaped portion 111, and a protrusion 114 that protrudes inward from the lower end of the tapered surface 113. In addition, a plate-like rail 115 protrudes below the support portion 112 of each long side portion of the receiving frame 110.

  On the other hand, the lid 120 includes a center lid 121 and two side lids 122 and 122 so that the lid 120 can be easily attached to and detached from the receiving frame 110. Both end portions 121 a and 121 a of the center lid 121 are bridged around the center of each long side portion of the receiving frame 110 and set on the support portion 112. Further, both end portions 121 a and 121 a of the center lid 121 are fixed to the receiving frame 110 by bolts 130 and 130. Further, the side surfaces 121b and 121ba of the center lid 121 are inclined upward with a slight angle.

  The side surface 122b of the peripheral end portion of the side lid body 122 is slightly inclined downward so as to be joined to the tapered surface 113 of the receiving frame 110 and the side surface 121a of the center lid body 121. When such a side lid 122 is set on the receiving frame 110 so as to sandwich the center lid 121 from both sides, the side surface 122b of the peripheral end of the side lid 122 is connected to the support portion 112 of the receiving frame 110 and the center lid 121. Is supported on the side surface 121a.

  Since such a side lid 122 is heavy, the side lid 122 on the side where the side lid 122 is joined to the center lid 121 (hereinafter referred to as “inside side”) is on the rail 115 of the receiving frame 110. The roller 123 which rolls is attached. Furthermore, a locking means 124 is attached to the end of the side lid 122 on the side (hereinafter referred to as “outside side”) that joins the short side of the receiving frame 110.

  In order to close the opening 1 inside the receiving frame 110 with the lid 120 in such a rectangular manhole, first, the center lid 121 is set at the center of the long side portion of the receiving frame 110. Both ends 121 a and 121 a of the center lid 121 are fixed to the receiving frame 110 by bolts 130 and 130. Thereafter, the side lids 122 and 122 are set on both sides of the center lid 121. The side lid 122 moves from the short side of the receiving frame 110 toward the center lid 121 while the roller 123 rolls on the rail 115.

  Then, as the roller 123 rolls on the rail 115, the side lid 122 collides with the center lid 121 with a certain speed. However, since the center lid 121 is fixed to the receiving frame 110 by the bolts 130 and 130, the center lid 121 is not displaced. In this way, the opening 1 is closed by the center lid 121 and the two side lids 122 and 122.

  And if the locking means 124 provided in the side cover body 122 is locked, since the center cover body 121 overlaps with the side cover body 122, it is not removed. When the opening 1 is opened, the locking means 124 is unlocked, both side lids 122, 122 are removed from the receiving frame 110, the bolts 130, 130 are removed, and the center lid 121 is received by the receiving frame. Remove from 110.

  In the rectangular manhole, both end portions 121 a and 121 a of the center lid 121 must be fixed to the receiving frame 110 by bolts 130 and 130. However, the work of attaching and removing the bolts 130 and 130 is not only troublesome, but the cost of the parts of the bolt 130 contributes to the cost increase of the rectangular manhole, and furthermore, if the bolt 130 is accidentally dropped into the joint groove. Difficult to find out.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a rectangular manhole that can be easily opened and closed with a three-piece lid and that is also cost-effective.

  The rectangular manhole according to the present invention is formed in a rectangular shape in which a pair of long side portions and a pair of short side portions are opposed to each other, and a receiving frame provided with a support portion on the inside, and a peripheral end portion of the receiving frame. A rectangular manhole comprising a lid that is attached to and detached from the receiving frame so as to be supported by the supporting part, wherein the receiving frame is provided with an overhanging part protruding outward at the center of each long side part, The lid is characterized in that both ends are divided into a center lid body fitted into the overhang portion and a pair of side lid bodies sandwiching the center lid body from both sides.

  According to this rectangular manhole, the inside of the receiving frame is an opening, and this opening is opened and closed by the center lid and the pair of side lids. The center lid is set by fitting both ends into an overhang provided at the center of each long side of the receiving frame. Therefore, even if the center lid is not fixed to the receiving frame by a fixture such as a bolt, the center lid does not move when it is collided with the side lid.

In the rectangular manhole according to the present invention, the side surface of the center lid body is inclined upward so that the side surface of the inner side surface of the side lid body covers the upper side surface of the center lid body. The side lid body is preferably inclined downward so that the side surface of the inner side is joined to the side surface of the center lid body.

  According to this rectangular manhole, when the side cover is set on both sides of the center cover set in the receiving frame, the side surface inclined downward of the side cover is inclined upward of the center cover. It will be in the state which covers a side surface, and a center cover body will not be taken out upwards.

  In the rectangular manhole according to the present invention, a rail that is inclined so that a center side is deep and an end side is shallow is provided on a long side portion of the receiving frame, and the rail is provided on the side lid body. It is preferable that a roller that rolls up is provided.

  According to this rectangular manhole, a roller is provided on the bottom surface of the inner side of the side lid, and the work of attaching and detaching the side lid to the receiving frame by rolling the roller on the rail provided on the receiving frame. Is reduced. When the side lid is set on the receiving frame, the side lid moves smoothly from the end side of the receiving frame to the center side by a roller that rolls on the rail whose center side is inclined lower than the end side. To do. Even if the side lid collides with the center lid, the side lid closes the opening at a predetermined position without moving because both ends of the center lid are fitted into the overhang portions of the receiving frame. .

  In the rectangular manhole according to the present invention, the side lid body is preferably provided with a locking means.

  According to this rectangular manhole, the lid can be prevented from being opened without permission by providing the side lid with the locking means. That is, the side lid is not removed from the receiving frame when the locking means is locked. In addition, the center lid is not removed by covering the inner side surface of the side lid. If the side of the inner side of the side lid is not covered with the side of the center lid, the center lid is locked to the side lid with a hook so that it cannot be removed without permission. can do.

  In the rectangular manhole according to the present invention, it is preferable that the receiving frame is provided with a cover portion that covers an upper side of the roller of the fitted side lid.

  According to this rectangular manhole, since the cover portion provided on the receiving frame covers the upper side of the roller portion of the side lid body fitted into the receiving frame, the cover portion acts like a lock mechanism, and the side lid body moves upward. Even if the roller is lifted, the roller is stopped by the cover portion, and the side lid can be prevented from being removed from the receiving frame.

  According to the present invention, the rectangular manhole is provided with an overhanging portion protruding outward at the long side portion of the rectangular receiving frame, and the lid fitted into the receiving frame is formed between the center lid and the pair of side lids. By dividing and fitting both ends of the center lid into the overhanging portion, it is possible to eliminate the need for a fixing tool such as a bolt for fixing the center lid.

  Therefore, the center lid can be set on the receiving frame without using a fixing tool such as a bolt, so that the workability of attaching and detaching the lid to the receiving frame is improved, and the burden on the operator is reduced. In addition, since the cost of parts such as bolts can be reduced, the cost of the rectangular manhole can be reduced. Furthermore, the inconvenience that a fixture such as a bolt falls into the common groove and is replaced with another fixture can be solved.

  An embodiment of a rectangular manhole according to the present invention will be described with reference to FIGS. The rectangular manhole includes a rectangular receiving frame 10 having an opening 1 on the inside and a lid 2 that is attached to and detached from the receiving frame 10.

  The receiving frame 10 includes a vertical wall-shaped portion 11 and a horizontal posture seat portion 12 integrally formed in an L-shaped cross section, and a pair of long side portions and a pair of seat portions 12 facing outward. Are formed in a rectangular shape facing the short side. Inside the wall-shaped portion 11, a support portion 13 that supports the peripheral end portion 2 a of the lid 2 is formed. The support portion 13 includes a tapered surface 14 that is inclined upward at a slight angle inside the wall-shaped portion 11, and a protrusion 15 that protrudes inward from the lower end of the tapered surface 14.

  In the center of the long side portion of the receiving frame 10, projecting portions 16, 16 projecting outward are provided. As for this overhang | projection part 16, the wall-shaped part 11 protrudes in a U shape, and the width | variety of the seat part 12 is made narrow. Except for this overhanging portion 16, a plate-like rail 17 protrudes below the support portion 13 of each long side portion of the receiving frame 10. The rail 17 is inclined so as to become gradually shallower from the center toward the end.

  The inner end of the rail 17 is folded back, and a cover portion 18 is provided that acts as a lock mechanism so that the lid 2 is not removed without permission. Further, on each short side portion of the receiving frame 10, a locked portion (not shown) is provided so as to cover a hook-shaped protruding portion of the locking means 37 described later.

  On the other hand, as shown in FIG. 2B, the lid 2 is divided into a center lid 20 and a pair of side lids 30 and 30 that sandwich the center lid 20 from both sides. The center lid 20 is formed longer than the width of the side lid 30 so that both end portions 20a and 20a are fitted into the overhang portions 16 and 16.

  Further, as shown in FIG. 3, the center cover 20 includes a substrate 21 spanned between the two overhanging portions 16 and 16 of the receiving frame 10 and a pair of side plates 22 and 22 provided on both sides of the substrate 21. It is integrally formed into an H-shape, and the upper side of the side surface 22a of the side plate 22 is inclined upward at a slight angle, and a ridge 23 projects from an intermediate portion of the side plate 22. Further, both ends of the side plate 22 are not provided with the protrusion 23 and the lower end 24 below the protrusion 23, and both ends 20 a, 20 a of the substrate 21 are formed on the protruding portions 16, 16 of the receiving frame 10. It is designed to be fitted.

  The side lid 30 is formed by integrally molding a side plate 32 around the entire circumference of the substrate 31. The side lid 32 has a shape in which the substrate 31 is joined to the lower end of the side plate 32 and has a recess 33 such as a tray. A paste (not shown) such as an interlocking block is buried in the recess 33. Further, ribs 31a are provided in a lattice shape on the front and back surfaces of the substrate 31, but the ribs 31a on the front surface side are lowered.

  Then, as shown in FIG. 3, the side surface 32a of the side plate 32 is slightly downward so as to be joined to the tapered surface 14 of the support portion 13 of the receiving frame 10 and the side surface 22a inclined upward. Inclined. Further, the bottom surface of the outer periphery of the substrate 31 is close to the protrusion 15 of the support portion 13 of the receiving frame 10 and the protrusion 23 of the center lid 20, and this protrusion is applied when a large load is applied to the side lid 30. Supported by Articles 15 and 23.

  Rollers 33 that roll on the rails 17 are attached to both ends of the bottom surface on the inner side where the side lid 30 is joined to the center lid 20. The roller 33 is attached to a holder 35 branched from a leg 34 fixed to the bottom side of the substrate 31.

  An insertion hole 36 for hooking an opening / closing handle (not shown) is provided at the center of the outer side end on the side where the side lid 30 is joined to the short side of the receiving frame 10. Further, a locking means 37 is attached to the outer side end of the side lid 30 and next to the insertion hole 36. Although not shown, the locking means 37 includes a cylinder that penetrates the substrate 31 in the vertical direction, a rotating shaft that rotates in the cylinder, and a bowl-shaped protruding portion that is provided at the lower end of the rotating shaft and protrudes from the lower end of the cylinder. And.

  As shown in FIG. 1A, the rectangular manhole configured as described above has both ends 20 a, 20 a of the center lid 20 fitted into the overhang portions 16, 16 of the receiving frame 10. The opening 1 is closed by the lid 2 by setting the side lid 30 to the receiving frame 10 so as to sandwich both sides. At this time, as shown in FIG. 1B and FIG. 3, the cover portion 18 is covered on the upper side of the roller 33 of the side lid 30. And by locking with the locking means 37, not only the side cover body 30 but the center cover body 20 is not opened arbitrarily.

  That is, since the center lid 20 is in a state where the side surface 32a of the side plate 32 of the side lid 30 covers the upper side of the side surface 22a of the side plate 22, it is not pulled out upward. Further, the side lid 30 has a protruding portion of the locking means 37 attached to the outer side end portion positioned below the locked portion protruding from the receiving frame 10, and the roller 33 is positioned below the cover portion 18. Since the cover portion 18 acts like a lock mechanism, the side lid 30 is not pulled out upward.

  And in order to make the opening part 1 into the opened state, it unlocks by removing the protrusion part of the locking means 37 from the to-be-latched part of the receiving frame 10. FIG. Thereafter, the lower end of the handle (not shown) is hooked into the insertion hole 36 of the side lid 30 and the outer side of the side lid 30 is lifted as shown in FIG. Subsequently, as shown in FIG. 4B, the side lid 30 is discharged from the receiving frame 10 while the roller 33 rolls on the rail 17.

  And as shown in FIG.4 (c), when the side cover body 30 is completely removed from the receiving frame 10, it will be set | placed on the ground. Further, the other side lid 30 is similarly removed from the receiving frame 10. In this state, since the side plate 32 of the side lid 30 does not overlap the side plate 22 of the center lid 20, the center lid 20 is lifted as shown in FIG. 1 is fully opened.

  Conversely, when the opening 1 is closed with the lid 2, first, the center lid 20 is set at the intermediate portion of the receiving frame 10. Then, the opening 1 is completely closed by the side lid 30. At this time, the roller 33 of the side lid 30 rolls on the rail 17, but since the rail 17 is inclined so as to become deeper from the end side of the short side toward the center, the side lid The 30 side plates 32 collide with the side plate 22 of the center lid body 20 vigorously.

  However, since the center lid 20 is in a state in which both end portions 20a and 20a are fitted into the overhang portions 16 and 16, the center lid 20 is pushed by the center lid 20 and does not move. Therefore, the side lid 30 closes the opening 1 at a predetermined position. Subsequently, when the remaining portion of the opening 1 is completely closed by the other side lid 30, the center lid 20 and the side lid 30 are fitted into the receiving frame 10 as shown in FIG. 1. It becomes.

  In addition, this invention can be variously changed within the range of the technical matter described in the claim, without being limited to the said embodiment. For example, the center lid 20 and the side surface 32a of the side lid 30 may not be inclined and may be oriented in the horizontal direction so that the center lid 20 is not detached from the side lid 30 by an L-shaped hook or the like. Further, the side lid 30 may be provided with a leg portion that does not include the roller 33 and moves smoothly on the rail 17. Further, when the rectangular manhole is installed in a place where it is not necessary to lock, the locking means 37 can be omitted. Furthermore, this rectangular manhole can be used not only for communication between the common groove and the ground, but also as a cover for closing a reservoir or the like.

It is one Embodiment of the rectangular manhole which concerns on this invention, Comprising: (a) is a top view, (b) is the sectional view on the AA line of (a). It is one Embodiment of the rectangular manhole which concerns on this invention, Comprising: (a) is a top view of a receiving frame, (b) is the top view which isolate | separated the lid | cover into the center cover body and a pair of side cover body. It is one Embodiment of the rectangular manhole which concerns on this invention, Comprising: It is front sectional drawing to which the principal part was expanded. It is one Embodiment of the rectangular manhole which concerns on this invention, Comprising: (a) is front sectional drawing when it begins to open a side cover body, (b) is front sectional drawing in the middle of opening one side lid body (C) is front sectional drawing when one side cover body is opened, (d) is front sectional drawing when a center cover body is removed. It is an example of the conventional rectangular manhole, Comprising: (a) is a top view, (b) is the BB sectional drawing of (a).

Explanation of symbols

2 …… Lid 2a… Circular end 10 …… Receiving frame 13 …… Supporting portion 16 …… Overhanging portion 17 …… Rail 18 …… Cover portion 20 …… Center lid 20a… End 22a… Side 30 …… Side lid Body 32a ... Side 37 ... Locking means

Claims (5)

A receiving frame in which a pair of long side portions and a pair of short side portions are opposed to each other, and a support portion is provided inside, and the peripheral end portion is supported by the support portion of the receiving frame. A rectangular manhole having a lid that is attached to and detached from the receiving frame,
The receiving frame is provided with a projecting portion protruding outward at the center of each long side portion, and the lid has a center lid body whose both end portions are fitted into the projecting portion, and a pair of sandwiching the center lid body from both sides A rectangular manhole that is divided into a side lid. As a state in which side surface covers the inner side of the side lid on the upper side of the center lid, the center lid has side surfaces inclined upward, before SL side lid, the side surface of the inner side 2. The rectangular manhole according to claim 1, which is inclined downward so as to be joined to a side surface of the center lid. The long side of the receiving frame is provided with a rail that is inclined so that the center side is deep and the end side is shallow,
The rectangular manhole according to claim 1 or 2, wherein the side cover body is provided with a roller that rolls on the rail.   The rectangular manhole according to any one of claims 1 to 3, wherein the side lid body is provided with locking means.   The rectangular manhole according to claim 4, wherein the receiving frame is provided with a cover portion that covers an upper side of the roller of the fitted side lid.

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