JP2012172404A - Manhole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manhole which can be opened by spreading and revolving a body cover, the manhole comprising a receiving frame with a cover receiving part provided on the inner side of a wall-like part, the body cover to be fitted in the receiving frame and mounted on the cover receiving part, and a connection member for connecting the receiving frame and the body cover with each other.SOLUTION: A connection member 30 comprises a lower cylindrical shaft part 31, an upper prism-like shaft part 32, a spreading shaft part 33 protruding outward at the upper end of the prism-like shaft part 32, and a pin 34 protruding from each of both faces of the spreading shaft part 33. In a cover receiving part 14 of a receiving frame 10, a shaft hole part 15 is provided penetrating through the receiving part 14 to make the cylindrical shaft part 31 and the prism-like shaft part 32 of the connection member 30 reciprocatable in a vertical direction and in one-side lateral direction and hardly movable in another lateral direction. In the backside of a body cover 21, a shaft hole part 21a is provided for fitting the spreading shaft part 33 and the pin 34 of the connection member 30.

Description

  The present invention relates to a manhole in which a lid fitted in a receiving frame can be opened and closed by a connecting member.

  There are various types of manholes provided at the entrance and exit between the underground structure and the ground, depending on the application. For example, Non-Patent Document 1 describes a manhole provided at the ground opening of an underground structure where a pump or the like is installed. As shown in FIG. 13, the manhole includes a receiving frame 110 installed at the ground opening of the underground structure, and a lid 120 fitted into the receiving frame 110.

  The receiving frame 110 is formed in a rectangular shape by a pair of long side portions 111 and a pair of short side portions 112, and a hook-shaped lid receiving portion projects inwardly from the wall-like portion of both the long side portions 111 and the short side portions 112. ing. In addition, an overhanging portion 116 protruding outward is provided in the middle of each short side portion 112.

  Further, the lid 120 has a plurality of rectangular body lids 121 arranged in two rows along each long side portion 111 of the receiving frame 110 and one elongated body disposed between the two rows of body lids 121. A beam cover 122 is combined. The beam lid 122 is bridged between the overhanging portions 116 of the receiving frame 110, and both ends are placed on the lid receiving portions formed on the overhanging portion 116 of the short side portion 112 of the receiving frame 110. Further, the beam lid 122 has hook-shaped lid receiving portions protruding from the wall-like portions on both sides.

  The main body lid 121 has one end 121 a placed on the lid receiving portion of the long side portion 111 of the receiving frame 110 and the other end 121 a placed on the lid receiving portion of the beam lid 122. Further, the outer body lid 121 arranged along the short side portion 112 of the receiving frame 110 is also placed on the lid receiving portion of the short side portion 112 of the receiving frame 110.

  Then, at both ends of the beam lid 122, female screws 122a for fastening eyebolts (not shown) are formed. In addition, at the end of each main body lid 121 on the beam lid 122 side (inner end side), two retaining holes 121c are provided to which the distal ends of the two bars 100 are hooked. Then, when the operator hooks and pulls the tip end of the burl 100 in the retaining hole 121c on the inner end side, the main body lid 121 can be unfolded and opened as shown in FIG.

  The beam cover 122 is removed from the receiving frame 110 by an eyebolt fastened to the female screw 122a and lifted by a lift (not shown) or the like.

  Patent Document 1 includes a lever rod for allowing the iron lid to turn in a manhole in which a rectangular iron lid fitted in a rectangular receiving frame is floated and opened. An iron lid coupling device is described. In this connecting device, a spherical receiving groove is formed on the lower surface of the peripheral edge of the iron lid, a spherical head that is rotatably fitted in the spherical receiving groove is formed at the upper end of the lever rod, and the lever rod can be pivoted up and down. It is characterized in that a supporting portion to be connected is provided on the inner peripheral edge of the receiving frame.

  And, this manhole has an insertion hole formed in the lower part of the lever rod, a bearing hole is formed in the support portion, and the shaft is passed through the insertion hole and the bearing hole, so that the lever rod is in an upright state, The iron lid can be supported by being levitated from the lid receiving frame. Moreover, the iron lid can be turned by inserting the spherical head of the lever rod into the spherical receiving groove.

Fusai Co., Ltd. Issued February 2010 Large Opening Iron Cover Opening Instruction Manual p.3-4

JP 2000-220162 A

  The manhole described in Non-Patent Document 1 can be opened by opening the main body lid, but cannot be opened by turning the lid. On the other hand, the open / close structure of the lid for an underground structure described in Patent Document 1 can turn the main body lid (iron lid), but cannot open the main body lid by opening it. However, there is a request to be able to open the lid regardless of whether the main body lid is opened or swung according to the usage situation.

  Therefore, an object of the present invention is to provide a manhole that can be opened by unfolding and turning the main body lid.

  The manhole according to the present invention includes a receiving frame provided with a lid receiving portion inside a wall-shaped portion, a main body lid that is fitted into the receiving frame and placed on the lid receiving portion, and a connection that connects the receiving frame and the main body lid The connecting member includes a lower cylindrical shaft portion, an upper prismatic shaft portion, a deployment shaft portion projecting outward at an upper end of the prismatic shaft portion, Pins projecting coaxially from both surfaces of the unfolding shaft portion are provided, and the cylindrical shaft portion and the prismatic shaft portion of the connecting member can be reciprocated in the vertical direction and one lateral direction in the lid receiving portion of the receiving frame. In addition, a shaft hole that penetrates so as to hardly move in the other lateral direction is provided, and on the back side of the main body lid, a shaft portion for deployment of the connecting member and a bearing portion for fitting the pin are provided. It is characterized by being.

  According to this manhole, the expansion shaft portion of the connecting member and the pin are fitted to the bearing portion provided on the back surface side of the main body lid, so that the main body cover is opened and opened, and the cylindrical shaft portion of the connecting member is opened. Can be pivoted and opened by passing through the shaft hole provided in the receiving frame.

  That is, when the manhole is in a closed state, the prismatic shaft portion of the connecting member penetrates the shaft hole portion of the receiving frame so as to be able to reciprocate in one width direction, thereby projecting on both surfaces of the unfolding shaft portion. The developed pin becomes a rotating shaft that moves in the bearing portion of the main body lid, and is unfolded and opened. At this time, the prismatic shaft portion of the connecting member is hardly moved in the other width direction (a direction orthogonal to the one width direction), so that the connecting member can be unfolded and the lid can be deployed. it can. Further, the main body lid is lifted from the inside of the receiving frame, so that the columnar shaft portion is positioned in the shaft hole portion of the receiving frame, and the columnar shaft portion turns around the rotation axis to open the lid.

  In the manhole according to the present invention, it is preferable that the connecting member is provided with a retaining portion at a lower end portion. According to this manhole, when the main body lid is opened, the retaining portion provided at the lower part of the connecting member is a lid around the shaft hole portion of the receiving frame when it is unfolded or turned and lifted from the receiving frame. By hitting the receiving portion, the connecting member can be prevented from coming off from the shaft hole portion.

  According to the present invention, the lower cylindrical shaft portion, the upper prismatic shaft portion, the deployment shaft portion projecting outward at the upper end of the prismatic shaft portion, and coaxially projecting from both surfaces of the deployment shaft portion By providing the manhole in which the receiving frame and the main body cover are connected by the connecting member having the pin, the cover can be opened even if the main body cover is opened or turned.

1 shows an embodiment of a manhole according to the present invention, where (a) is a plan view with a part cut away, and (b) is a cross-sectional side view taken along line AA of (a). It is a perspective view which shows one Embodiment of the connection member which comprises the manhole which concerns on this invention. It is one Embodiment of the manhole which concerns on this invention, Comprising: It is a principal part expanded sectional side view which shows the closed state. It is one Embodiment of the manhole which concerns on this invention, Comprising: It is a principal part expanded sectional side view which shows the 1st step which expand | deploys and opens a lid | cover. It is one Embodiment of the manhole which concerns on this invention, Comprising: It is a principal part expanded sectional side view which shows the 2nd step which expand | deploys and opens a lid | cover. It is one Embodiment of the manhole which concerns on this invention, Comprising: It is a principal part expanded sectional side view which shows the 3rd step which expand | deploys and opens a lid | cover. It is one Embodiment of the manhole which concerns on this invention, Comprising: It is a principal part expanded sectional side view which shows the 4th step which expand | deploys and opens a lid | cover. It is one Embodiment of the manhole which concerns on this invention, Comprising: It is a principal part expanded sectional side view which shows the 5th step which expand | deploys and opens a lid | cover. It is one Embodiment of the manhole which concerns on this invention, Comprising: It is a principal part expanded sectional side view which shows the state which expand | deployed completely and opened. It is one Embodiment of the manhole which concerns on this invention, Comprising: It is a principal part expanded sectional side view which shows the state expand | deployed and opened in order to verify safety | security. It is one Embodiment of the manhole which concerns on this invention, Comprising: It is a principal part expanded sectional side view which shows the stage in the middle of turning and opening a lid. It is one Embodiment of the manhole which concerns on this invention, Comprising: It is a principal part expanded sectional side view which shows the state which turned completely and was opened. It is a perspective view which shows an example of the conventional manhole and shows the closed state. It is a perspective view which shows the state which is partially opened which shows an example of the conventional manhole.

  An embodiment of a manhole according to the present invention will be described with reference to FIGS. The manhole includes a rectangular receiving frame 10 fixed to the rectangular frame-shaped base 1 and a lid 20 fitted into the receiving frame 10.

  The lid 20 is a combination of rectangular body lids 21 arranged in two rows along each long side 11 of the receiving frame 10 and an elongated beam lid 22 disposed between the two rows of body lids 21. . The receiving frame 10 and the main body lid 21 are connected by a connecting member 30.

  As shown in FIG. 2, the connecting member 30 has a lower cylindrical shaft portion 31 and an upper prismatic shaft portion 32 provided coaxially, and outwards at the upper end of the prismatic shaft portion 32, that is, the receiving frame 10. The unfolding shaft portion 33 protrudes toward the long side portion 11, and pins 34 protrude from both surfaces of the unfolding shaft portion 33. The prismatic shaft portion 32 is preferably a quadrangular prism shape as illustrated, but the shape is not limited as long as it is a polygon. Further, the distal end side of the developing shaft portion 33 is formed in a semi-cylindrical shape.

  The connecting member 30 is provided with a stopper 35 at the lower end. The retaining portion 35 includes an extended portion 35a provided to protrude from the lower portion of the cylindrical shaft portion 31, a through hole 35b provided in the extended portion 35a, and protrudes from both sides through the through hole. A shaft 35c is provided.

  The lower end side of the extending portion 35a is formed in a semi-cylindrical shape. The through hole 35 b is provided in the same direction as the direction of the pin 34, and the periphery of the through hole 35 b is formed flat in the same direction as the plane of the prismatic shaft portion 32. The shaft 35c is a combination of a bolt and a nut (not numbered), and the nut is fastened to the bolt that has passed through the through hole 35b, so that the shaft 35c is prevented from coming out of the through hole 35b. The shaft 35c may be configured by a downward U-shaped shaft or the like.

  The receiving frame 10 is formed in a rectangular shape by a pair of long side portions 11 and a pair of short side portions 12, and the long side portion 11 and the short side portion 12 both have a wall-shaped portion 13 and a bowl-shaped lid receiving portion 14. Protrusively inward.

  In the lid receiving portion 14 of the long side portion 11, the columnar shaft portion 31 and the prismatic shaft portion 32 of the connecting member 30 are arranged in the vertical direction and one lateral direction (in this embodiment, a direction parallel to the short side portion 12). A shaft hole portion 15 is provided so as to be able to reciprocate and penetrate almost without moving in the other lateral direction (a direction parallel to the long side portion 11 in this embodiment). That is, the width in the long side direction of the shaft hole portion 15 is slightly larger than the width in the long side direction of the columnar shaft portion 31 and the prismatic shaft portion 32 of the connecting member 30.

  Further, as shown in FIG. 1A, an overhanging portion 16 for supporting the end portion of the beam lid 22 is provided in the middle of each short side portion 12. 1A is a plan view in which the two main body lids 21 on the right side are removed and the lower right side of the beam lid 22 is cut obliquely.

  A female screw (not shown) for fastening the eyebolt is formed on the upper surface near both ends of the beam lid 22. The beam lid 22 also has a hook-shaped lid receiving portion 22b protruding from the wall-like portions 22a on both sides toward the long side portion 11 of the receiving frame 10. The lid receiving portion 14 of the receiving frame 10 and the lid receiving portion 22b of the beam lid 22 are provided at the same height and support each end of the main body lid 21.

  A shaft hole portion 21a into which the developing shaft portion 33 and the pin 34 of the connecting member 30 are movably fitted in one width direction is provided on the back surface side, which is an intermediate portion of the short side portion 12 of the main body lid 21. It has been.

  The shaft hole portion 21a is formed in a dovetail shape by a pair of beam-like portions 21b that sandwich the development shaft portion 33 of the connecting member 30 from both sides with a gap and covers the pin 34 from below. Yes. In addition, a female screw is formed on the inner end of each beam 21b on the beam lid 32 side, and the bolt 21c is fastened to the female screw so that the connecting member 30 does not come out of the shaft hole 21a. Has been. Therefore, in the connecting member 30, the bolt 21c is fastened to the female screw after the developing shaft portion 33 is set in the shaft hole portion 21a.

  Then, at both end portions of the upper surface of the main body lid 21, there are provided retaining holes 21 d for hooking the tip of the bar. However, the retaining holes 21d are provided at two locations on both sides of the shaft hole portion 21a at the outer end portion on the long side of the receiving frame 10 and at one central location at the inner end portion on the beam cover 22 side. .

  The manhole is constructed in this way, and the method of opening the lid next will be described with reference to FIGS.

  When the manhole is closed, as shown in FIGS. 1 and 3, both end portions of the main body lid 21 are supported on the lid receiving portion 14 of the receiving frame 10 and the lid receiving portion 22b of the beam lid 22, and are connected. The prismatic shaft portion 32 of the member 30 is located in the shaft hole portion 15 of the receiving frame 10 and on the wall-shaped portion 13 side.

  In order to unfold and open the main body lid 21, first, as shown in FIG. 4, the tip of the bar (reference numeral 100 in FIG. 14) is hooked into the retaining hole 21d inside the main body lid 21, and the bar is opened. By pulling, the body lid 21 is inclined. At this time, the prismatic shaft portion 32 of the connecting member 30 is gradually separated from the wall-shaped portion 13 side in the shaft hole portion 15 of the receiving frame 10, and the entire connecting member 30 is slightly lifted.

  Then, by further pulling the bar, the main body lid 21 is in a state of rising with an increased inclination angle, as shown in FIGS. At this time, the prismatic shaft portion 32 of the connecting member 30 is positioned inside the shaft hole portion 15 of the receiving frame 10 (on the beam lid 22 side), and the displacement of the connecting member 30 is restricted within the shaft hole portion 15. The body lid 21 develops the pin 34 around the rotation axis.

  Further, by further pulling the bar, the main body lid 21 is in a vertical posture as shown in FIG. 7, and after the connecting member 30 has been raised most, it is slightly inclined outward from the vertical posture as shown in FIG. It becomes a posture. The inclined main body lid 21 is in a state where the inner side of the short side portion 12 is supported by the edge of the wall-like portion 13 of the receiving frame 10. At this time, the connecting member 30 slightly returns to the wall-shaped portion 13 side in the shaft hole portion 15.

  Then, by further pulling the bar, the main body lid 21 is stabilized by developing the pin 34 of the connecting member 30 on the rotation axis and making the angle with the horizontal line smaller than 45 ° as shown in FIG. The lid is opened in the posture and the work is finished.

  In this series of developments, the width in the long side direction of the shaft hole portion 15 is slightly larger than the width in the long side direction of the columnar shaft portion 31 and the prismatic shaft portion 32 of the connecting member 30, Since the columnar shaft portion 32 hardly moves in the direction parallel to the long side portion 11, the connecting member 30 is not shaken in the shaft hole portion 15, and thus the main body lid 21 is stably opened.

  Then, in the connecting member 30 that is completely opened, the developing shaft portion 33 is slightly tilted toward the long side portion 11 of the receiving frame 10, and the boundary portion between the cylindrical shaft portion 31 and the prismatic shaft portion 32 is the shaft hole portion. It hits the front side in 15 and it will be in the state supported.

  And in order to verify safety | security, as shown in FIG. 10, the main body lid | cover 21 makes the connection member 30 the state further lifted, and makes the angle made with a horizontal line into about 30 degrees. At this time, the connecting member 30 does not come out of the shaft hole portion 15 because the shaft 35 c of the connecting member 30 hits the lid receiving portion 14 of the receiving frame 10. And the main body lid | cover 21 is set as such an attitude | position, and safety | security of the pin receiving part 14 of the part of the axial hole part 15, the pin 34 of the connection member 30, etc. can be verified.

  One or more main body lids 21 are further developed in accordance with the purpose of opening the lid. The beam lid 22 can be completely opened by fastening eyebolts to female screws formed at both ends, hooking wires to the eyebolts, and lifting them with a lift or the like. When closing the lid, the reverse operation is performed.

  Next, the operation of turning the main body lid 21 to open it will be described with reference to FIGS. In order to turn the main body lid 21, the tip of a bar (not shown) is hooked in each of the retaining holes 21d provided at three positions of the main body lid 21, and the main body lid 21 is horizontally moved as shown in FIG. Pull up with posture. The body lid 21 is pulled up until the bottom surface is positioned slightly above the top surface of the receiving frame 10, that is, the ground.

  At this time, the columnar shaft portion 31 of the connecting member 30 is located in the shaft hole portion 15. Therefore, the main body lid 21 cannot be lifted as long as the shaft 35 c of the connecting member 30 hits the bottom surface of the lid receiving portion 14.

  Then, the pulled-up main body lid 21 turns and opens as shown in FIG. 12 with the columnar shaft portion 31 of the connecting member 30 as the rotation axis by turning the beam lid 22 side in an arc shape. As described above, one or a plurality of main body lids 21 are further developed in accordance with the purpose of the lid opening, and the beam lid 22 is removed. When closing the lid, the reverse operation is performed.

  The present invention can be variously modified without being limited to the above embodiment. For example, the connecting member 30 may be configured such that the retaining portion 35 is not provided by sufficiently lengthening the cylindrical shaft portion 31. When the retaining portion 35 is provided, an enlarged portion larger than the shaft hole portion 15 may be integrally formed with the cylindrical shaft portion 31, or a through hole 35 b may be formed in the cylindrical shaft portion 31. .

  Further, the manhole may be of a type without the beam lid 22, a type in which one rectangular main body lid 21 is fitted into the receiving frame 10, or a type in which the circular main body lid 21 is fitted into the receiving frame 10.

DESCRIPTION OF SYMBOLS 10 ... Receiving frame 11 ... Long side part 12 ... Short side part 13 ... Wall-shaped part 14 ... Lid receiving part 15 ... Shaft hole part 16 ... Overhang | projection part 20 ... Lid 21 ... Main body lid 21a ... shaft hole 22 ... beam cover 30 ... connecting member 31 ... cylindrical shaft part 32 ... prismatic shaft part 33 ... deployment shaft part 34 ... pin 35 ... retaining part 35a ... extension part 35b ... through hole 35c ... shaft

Claims (2)

A receiving frame provided with a lid receiving portion inside the wall-shaped portion, a main body lid that is fitted into the receiving frame and placed on the lid receiving portion, and a connecting member that connects the receiving frame and the main body lid are provided. A manhole,
The connecting member includes a lower cylindrical shaft portion, an upper prismatic shaft portion, a deployment shaft portion projecting outward at the upper end of the prismatic shaft portion, and coaxially projecting from both surfaces of the deployment shaft portion. A pin is provided, and the lid receiving portion of the receiving frame is capable of reciprocating the columnar shaft portion and the prismatic shaft portion of the connecting member in the vertical direction and one lateral direction, and hardly moves in the other lateral direction. A manhole characterized in that a shaft hole portion penetrating therethrough is provided, and on the back side of the main body lid, a shaft portion for deployment of the connecting member and a bearing portion for fitting a pin are provided.   The manhole according to claim 1, wherein the connecting member is provided with a retaining portion at a lower end portion.

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