JP3785066B2 - Cover for underground structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lid for closing an opening / closing port of an underground structure.
[0002]
[Prior art]
The lid used for the underground structure is called a manhole lid or the like, and because of the heavy load, a lid opening tool called a hand key or a bar is used for opening the lid. There are various types of tools for opening the lid, but a tool having a T-shaped locking portion was devised in Japanese Utility Model Publication No. 58-5712. In the case of the same device, an overhanging upper edge portion is provided opposite to both sides of the hole into which the locking portion is inserted, so that both ends of the T-shape can be hooked. However, when the structure of the invention was implemented, there was a problem that when the lid biting into the receiving frame was rubbed with the bar, the position of the bar was not fixed, and the bar escaped and it was difficult to enter force. Furthermore, when the bar is inserted into the burl hole and the lid is lifted, there is a problem that the burl slips or rattles.
[0003]
It is effective to use an opening / closing tool such as that shown in Japanese Patent No. 3044431 in order to open the lid that bites into the receiving frame. However, the opening / closing tool of the present invention is special as a tool, and there is a problem that it is inconvenient and the workability is not good because it is necessary to engage the receiving frame across the edge of the lid. In addition, the burl hole in the present invention has a bag hole shape that opens only on the upper surface, so that there is a drawback that earth and sand and dust are likely to accumulate inside and are not easily scraped.
[0004]
[Problems to be solved by the invention]
This invention which paid its attention to the said point makes it a subject to provide the lid | cover for underground structures which enables the stable lid opening operation | work. Another object of the present invention is to provide a cover for an underground structure having a bag hole that can easily scrape earth and sand.
[0005]
[Means for Solving the Problems]
In order to solve the above-described problems, the lid for an underground structure according to the present invention has an opening for inserting a locking portion provided in the hand key on the upper surface of the edge of the lid body, and the opening is a locking of the hand key. The bag hole has left and right side parts that are wider than the opening width, and can receive and lock the locking part of the hand key inserted into the opening, has a configuration projecting from the supporting example preparative become supporting portion when removing the lid body inserted into the blind hole a locking portion of the hand hook from the opening in the blind hole portion than the edge of the opening, the supporting portion, blind hole Projecting from the bottom of the lid toward the opening and maintaining a gap between them without blocking both the opening and the notch-shaped notch located on the side surface at the edge of the lid body. It has a T-shaped locking portion, to contact at three points of the support portion right and left sides of the retaining portion of the blind hole In which took measures that the things.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
The cover for an underground structure according to the present invention is a cover including a so-called manhole cover that closes an opening and closing for an approach to the underground structure. This type of lid includes a circular, triangular, or rectangular lid depending on the shape of the opening and closing, and the material is mostly made of ductile cast iron and mainly made of metal. The opening / closing port is provided in the receiving frame, and a structure for receiving and supporting the lid main body is provided at the opening / closing port, that is, the receiving frame side.
[0007]
A hand key is used to remove the lid body from the opening. The hand key is a lid opening tool similar to that referred to as a bar, and is provided with a locking portion at its end. The hand key has a rod-like portion and has a locking portion at one end such as a tip thereof, and this locking portion has a substantially T-shaped planar shape . The lid opening tool having a substantially T-shaped locking portion is also suitable for the case where the lid main body biting into the receiving frame is pulled out of the receiving frame following the operation of prying up the lid main body.
[0008]
The lid body has an opening for inserting a locking portion provided on the hand key on the upper surface of the edge portion. The opening is a mouth for inserting the locking portion, and is not any more than that. The opening has a size and a shape for receiving the locking portion of the hand key, and the opening is a bag-shaped hole, so that the locking portion corresponds to the top surface of the bag hole on both the left and right sides of the opening. It becomes possible to be locked to the lid body at the latching portion at (1).
[0009]
Since hand key has a generally T-shaped locking portion, the aperture is substantially T-shaped locking straight stop portion pluggable width from the edge of the lid body, i.e. substantially I-shaped It can be formed in a planar shape (the invention according to claim 2). At this time, the substantially T-shaped locking portion is vertically inserted into the opening, and the direction is changed by 90 degrees in the bag hole to lock the lid main body. The opening may also be formed in a substantially T-shaped planar shape from the edge of the lid body toward the center, in which case the T-shape of the hand key is aligned with the T-shaped opening of the lid body. The locking portion can be inserted and locked to the lid body. Even if the flat shape is a hand key with a T-shaped locking part, the tool body has deformations such as a straight shape and a slightly bent neck, all of which are used for the lid of the present invention It is desirable to be possible.
[0010]
In such a configuration, insert the locking portion of the hand hook from the opening into the blind hole, when removing the lid body, supporting example preparative made support is projected to the blind hole portion than the edge of the opening. Since the opening communicates with the bag hole, the support portion according to claim 1 can be provided so as to protrude from the bottom of the bag hole portion toward the opening. If you open lid support portions as supporting example, emphasis is another part of the hand key, it comes to somewhere action point of the inside of the lid body or the opening. The opening can further lead to a notch-like cutout located on the side surface at the edge of the lid body . Since it may be said that the bag hole communicates with the notch, it is easy to scrape out from the notch when dirt or dirt accumulates in the bag hole. Wherein the support portion is not be closed even either of the opening and the notch opening, and is provided so as to keep the gap between them, this gap, sediment Ya that remains in blind hole if there is support portion There is no risk of scraping garbage.
[0011]
【Example】
Hereinafter, the present invention will be described in more detail with reference to the illustrated embodiments. FIG. 1 relates to Example 1 having an opening 11 having a substantially I-shaped planar shape from the edge toward the center of the lid body on the upper surface of the edge of the lid body 10. The opening 11 communicates with the bag hole 12 formed of a space expanded to receive the engaging portion 51 at the tip of the hand key 50, and also reaches the notch 13 located on the side, reaching the edge on the outside. Communicates.
[0012]
The bag hole 12 is a bag-like hole that does not communicate with the outside except for the opening 11 and the notch 13, and the bottom 14 of the bag hole 12 has a stepped shape with the outer side 14 ′ one step higher. The bottom part is the lower end part of the cutout 13 as it is, and even if earth, sand, dust, water or the like enters from the outside, it does not pass into the underground structure. The left and right side portions 15 and 16 of the bag hole 12 are wider than the opening width, receive the horizontal bar portion of the substantially T-shaped locking portion 51, and the latching portions 41 and 41 and the edge portions on the left and right sides of the bag hole 12. The front end 17 of the bag hole 12 extends toward the center of the lid main body 10, so that a substantially T-shaped locking portion 51 can be inserted.
[0013]
The support portion 18 is provided on the outer portion 14 ′ of the bottom portion 14 so as to protrude toward the opening 11 (FIG. 3B), but the width is smaller than the opening 11 and a gap 19 is formed. It has come to be. The support portion 18 that keeps the gap 19 between the opening 11 and the wider bag hole 12 also communicates with the notch 13 having an enlarged opening width (FIG. 1B). The support portion 18 has a height suitable for supporting the hand key 50 at the upper end, increases its own strength, and serves as a guide when the hand key 50 is handled in the bag hole. A base 20 formed in an inclined or stepped shape for facilitating scraping is provided on the front surface (inner surface) (see FIGS. 2A and 2B).
[0014]
In the case of the first embodiment, the hand key 50 has a T-shaped locking portion 51 with a bent neck, and the locking portion 51 is inserted vertically into the opening 11 (FIG. 4A), and is inserted into the bag hole. Then, it is rotated about the axis by 90 degrees (FIGS. 4B and 4C) and is locked to the lid main body 10. The lid opening method will be described later together with Example 2. Of course, the distance from the tip 17 of the bag hole 12 to the front surface of the support portion 18 is larger than the width of the T-shaped locking portion 51, and the height inside the bag hole 12 is the height of the locking portion 51. It is larger than the dimension in the insertion direction.
[0015]
FIG. 5 shows a second embodiment of the present invention having a substantially T-shaped opening 31. The opening 31 has a laterally long portion 31 'formed slightly larger than the width of the T-shaped locking portion in front ( Inward). The width of the laterally long portion 31 ′ is substantially the same as the width of the bag hole portion 32, and the opening 31 also extends to the notch 33 with a slightly larger width outside. The form of the bottom 34 of the bag hole 32 and the outer side 34 ′ thereof, the outer left and right side parts 35 and 36, and the tip 37 are the same as those in the first embodiment. A support portion 38 is provided on the outer portion 34 ′ of the bottom portion 34 so as to form a gap 39 between the left and right wall portions, and the support portion 38 has a front surface (inner surface) formed in an inclined shape. Can have a base 40.
[0016]
In the case of the second embodiment, the hand key 50 'is shown as having a substantially T-shaped locking part 51' at the tip of the straight tool body (FIGS. 7 and 8), and the substantially T-shaped engagement. Similarly, it is only necessary to insert the stop portion 51 ′ in alignment with the substantially T-shaped opening 31 and the horizontally long portion 31 ′, and tilt the handwheel 50 as it is. Accordingly, in the case of the lid main body 10 of the second embodiment, the insertion of the hand key 50 is easy, and an operation of changing the direction by 90 degrees after the insertion is not considered when considering a method of insertion as in the first embodiment. .
[0017]
The lid opening method will be described. In the case of the first embodiment, as shown in FIG. 4 , the locking part 51 is inserted into the bag hole 12 from the opening 11, and then the locking part 51 is attached to the top surface of the bag hole 12 by tilting the handbag 50 backward. The lid body is brought into contact with the latching portion 41 inward of the inward projection 43 ( FIG. 9 (a) ), with the upper end of the receiving frame 42 as a fulcrum 44 near the bent portion of the neck of the hand key 50 by lever action 10 is squeezed (FIG. 9B) to remove the bite into the receiving frame 42 (FIG . 9B) . The direction of the hand key 50 is changed with respect to the lid body 10 which can move with respect to the receiving frame 42, and then pulled backward, and the locking portion 51 is disposed on the left and right side portions 15, 16 of the bag hole 12. square projection 43 and supporting the lid body 10 at three points by the upper end 18 'of the support 18, pulling the hand key 50 outwardly and upwardly. This state is at the same stage as in FIG. 11A , and the hand key 50 is further operated to be dragged out of the receiving frame 42 (see FIG. 11B).
[0018]
Inner to the case of Example 2, the opening 31 as shown in FIG. 10, insert the Horizontal portion 31 'engaging portion 51 from the blind hole 3 2', than the inner projection 43 of the top surface of the blind hole 32 Write abutted against the retaining portion 41 in (FIG. 10 (a)), by tilting the lower rear hand key 50 ', prying the lid body 10 to the upper end of the receiving frame 42 as a fulcrum 44 (FIG. 10 (b)) The bite into the receiving frame 42 is removed. Next, the key 50 'is pulled rearward and upward , and the locking portion 51' is disposed on the left and right side portions 35, 36 of the bag hole 32. The lid main body is formed by the inward projection 43 and the upper end 38 'of the support portion 38. 10 is supported at three points (FIG. 10 ( c )), and the hand key 50 'is lifted upward and outward so as to be dragged out of the receiving frame 42 (FIGS. 11 (a) and 11 (b)).
[0019]
During these operations of Examples 1 and 2, 'abuts the lid body 10 by the retaining portion 41 multiplied when bring press, the engagement portion 51 when pulling the cap body 10' hand key 50 and 50 Positioned at the left and right side portions 15 , 16 , 35 , 36 of the bag holes 12, 32, it is stably engaged with the lid body 10 , and the support portions 18, 38 also serve as stoppers, so that the hand keys 50, 50 ' There is no risk of slipping out even if handled roughly.
[0020]
Needless to say, in the case of the first embodiment, also in the case of the second embodiment, the insides of the bag holes 12 and 32 leading to the openings 11 and 31 and the horizontally long portion 31 'are the locking portions 51 and 51 of the hand keys 50 and 50'. There is enough space to move '' freely (FIG. 12 (a)). Further, since the bag holes 12 and 32 are also connected to the outer cutouts 13 and 33, even if dirt or dirt accumulates in the bag holes 12 and 32, they are used as gaps on both sides of the support portions 18 and 38. 19 and 39 can be easily scraped (FIGS. 12B and 12C). It is also possible to fit the lid main body 10 to the receiving frame 42 by performing the operations according to the above operations in the reverse order.
[0021]
【The invention's effect】
Since the present invention is configured and operates as described above, the lid opening operation in the underground structure using the hand key can be performed very stably, and the hand key having a substantially T-shaped planar shape. Can be used to open the lid body having a substantially I-shaped or T-shaped opening shape. On the other hand, by opening the bag hole to the side cutout, It has an effect that it is easy to scrape accumulated sediment and garbage.
[Brief description of the drawings]
FIG. 1 (a) is a partial plan view showing a first embodiment of a lid for an underground structure according to the present invention.
(B) The same partial side view.
2A is a transverse cross-sectional view of the center portion of FIG.
(B) The same cross-sectional view which shows the modification of a support part.
3A is a cross-sectional view taken along line AA in FIG.
(B) BB sectional drawing of FIG.
4A is an explanatory view showing a state where a locking portion is inserted into the opening of Embodiment 1. FIG.
(B) Explanatory drawing which shows operation which rotates the inserted latching | locking part within a bag.
(C) Explanatory drawing which shows the state which tilts the rotated latching | locking part back.
FIG. 5 is a partial plan view showing Example 2 of the lid for an underground structure according to the present invention.
FIG. 6 is a cross-sectional view of the center part.
7 is a plan view showing a state in which a locking portion is inserted into the opening of Embodiment 2. FIG.
FIG. 8 is an explanatory view showing a state in which the inserted locking portion is tilted backward.
FIG. 9A is an explanatory diagram showing an example of a state immediately before the lid body is pry open.
(B) Explanatory drawing which shows the state which has opened the cover main body.
(C) Explanatory drawing which shows the state which pulls up the lid main body which opened.
FIG. 10A is an explanatory diagram showing another example of a state immediately before the lid body is pry open.
(B) Explanatory drawing which shows the state which has opened the cover main body.
(C) Explanatory drawing which shows the state which pulls up the lid main body which opened.
11A is an external view showing a state where the lid body is pulled up. FIG.
(B) The external view which shows the state which drags out a cover main body further.
FIG. 12A is a cross-sectional view showing the relationship of locking portions arranged in a bag hole.
(B) Sectional drawing which shows the state which is scratching the earth and sand in a bag hole with a latching | locking part.
(C) Sectional drawing which shows the state which has further scraped the earth and sand with the latching | locking part.
[Explanation of symbols]
10 Lid body 11, 31 Opening 12, 32 Cap hole 13, 33 Notch 14, 14'34, 34 'Bottom 18, 38 Supporting part 19, 39 Clearance 50, 50' Hand key 51, 51 'Almost T-shaped Locking part

Claims (2)

A lid that closes the opening and closing of the underground structure, and has an opening on the upper surface of the edge of the lid body for inserting a locking portion provided in the hand key, and the opening is a bag hole that receives the locking portion of the hand key The bag hole has left and right side parts that are wider than the opening width, and can accept and lock the locking part of the hand key inserted into the opening, and further lock the hand key. part of having a configuration which projects a supporting example preparative become supporting portion when removing the lid body inserted into the blind hole from the opening in the blind hole portion than the edge of the opening, the supporting portion, into the opening from the bottom of the blind hole A gap is maintained between the opening and the edge of the lid main body without blocking both the notch-shaped notch openings located on the side surfaces of the opening and the lid body. have a retaining portion, characterized that you contact at three points of the support portion right and left sides of the retaining portion of the blind hole Under construction for the lid.   The basement according to claim 1, wherein the opening has a substantially I-shaped or T-shaped planar shape from the edge of the lid body toward the center and has a size capable of inserting the locking portion. Structural lid.

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