JP2005090149A - Locking device for manhole - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a locking device for a manhole easily installable in an existing manhole having no locking device, by using an all purpose cover body having a hook part. <P>SOLUTION: This locking device for the manhole locks the cover body 10 having the rotatable hook part 1 in a state of being locked up in an opening part S of a receiving frame body 20 having a seat board 24 projecting to an inner peripheral surface. The locking device for the manhole is fixed to the seat board 24 of the receiving frame body 20, and has an installation board 30 provided with a fixing part 31 for fixing the hook part 1. The seat boards 24 and 24 of the receiving frame body 20 are separately arranged in a pair. The installation board 30 has a pair of fixing parts 32 and 32 overlapping with the respective seat boards 24 and 24 on both sides of the fixing part 31. The fixing parts 32 of the installation board 30 and a receiving member 40, are fixed by a bolt 51 in a state of sandwiching the seat boards 24. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a locking device for a manhole for locking a manhole provided with a receiving frame body having an opening and a lid for closing the opening of the receiving frame so as to be openable and closable, and in particular, includes a locking device. The present invention relates to a locking device for manholes that can easily cope with existing manholes that are not provided.

A manhole installed between the underground space surrounding the electric wire, gas pipe, water pipe, etc. and the ground space has a receiving frame fitted into the ground surface, and a lid that closes the opening of the receiving frame so that it can be opened and closed. It has. Then, the lid body is removed from the receiving frame body freely so that the electric wire in the underground space is not destroyed, or by rain water filled in the underground space due to heavy rain, etc. In order to prevent the lid from being pushed up, a manhole provided with a locking device that prevents the lid from unintentionally coming off the receiving frame is also provided (see, for example, Patent Document 1).
JP 2000-212982 A

  Many existing manholes do not have a locking device. In such a manhole, in order to prevent the lid from unintentionally coming off the receiving frame, it must be replaced with a manhole equipped with a locking device. However, in order to replace manholes, existing manholes must be discarded, which is uneconomical, and traffic is blocked for a long time during the replacement work, causing traffic congestion.

  Moreover, the manhole provided with the locking device can be locked by locking the rotating collar provided on the lid on the inner edge of the receiving frame. Therefore, it is also conceivable to provide a locking device by fitting a lid body having a rotating collar part into a receiving frame body of an existing manhole. However, the manhole cannot be provided with a locking device simply by diverting the lid provided with the collar depending on the dimensions of the collar of the lid and the positional relationship of the inner hooks of the receiving frame.

  Therefore, the present invention uses a commonly used lid body with a collar and a manhole locking device that can be easily attached without replacing an existing manhole without a locking device. It is an issue to provide.

  The locking device for manholes according to the present invention is a locking device for manholes that locks a lid having a rotatable collar in a state of being closed by an opening of a receiving frame having a seat that protrudes on the inner peripheral surface. The apparatus is characterized in that it is provided with a mounting board that is fixed to a seating board of the receiving frame body and that is provided with a latching part that latches the collar part.

  According to this manhole locking device, the mounting board provided with the latching portion can be easily attached to the receiving frame body of the existing manhole by being fixed to the seat board of the receiving frame body. Then, the hook part provided on the lid body rotates, and the hook part can be locked by being positioned below the hooking part of the mounting plate fixed to the seat base of the receiving frame body. It can be unlocked by releasing from the lower side.

  Further, in the locking device for manholes, a pair of seat bases of the receiving frame body are provided apart from each other, and the mounting board is provided with a pair of fixing portions that overlap each of the seat bases on both sides of the latching portion. It is preferable. According to this locking device for manholes, the fixing part of the mounting board is fixed to a pair of seats spaced apart from the receiving frame body, so that the mounting board can be attached to the receiving frame body in a stable state, A latching portion having a size that is necessary and sufficient for latching the collar portion can be provided between the fixed portions.

  The locking device for the manhole includes a receiving member that sandwiches the seat of the receiving frame body with a fixing portion of the mounting plate, and a continuous through hole is formed in the fixing portion and the receiving member. It is preferable that the mounting plate and the receiving member are fixed to the seat plate by a fastening member that penetrates the hole. According to this locking device for manholes, the fixing part of the mounting board and the receiving member sandwich the seating board, the fastening member passes through both continuous through holes, and is fastened, whereby the mounting board is seated on the receiving frame body. Can be firmly fixed. Note that the fastening member is constructed by, for example, a bolt with a hexagonal hole having a cylindrical head and a female screw formed in the through hole of the receiving member, thereby improving the assembly workability and mounting. By providing a large diameter part into which the head of the bolt enters the fixed part of the panel, the head of the bolt can be prevented from obstructing the closure of the lid.

  In the manhole locking device, a protruding piece may be provided on the seat base of the receiving frame body, and an engagement hole for fitting the protruding piece may be formed in the fixing portion of the mounting board. . According to this manhole locking device, the projecting piece provided on the seat base of the receiving frame body is fitted into the engagement hole formed in the fixing portion of the mounting board, thereby facilitating the positioning work for fixing the mounting board. Become.

  According to the present invention, the latching portion for latching the collar portion provided in the lid is provided on the mounting plate, and the locking plate is provided by fixing the mounting plate to the seat base of the receiving frame body. The locking device can be easily attached to an existing manhole. Therefore, not only can the existing manhole be discarded, but the locking device can be attached economically, and since the attaching operation is easy, the time for blocking the passage can be extremely shortened. And the manhole without the locking device is remodeled to the manhole with the locking device, so that the lid is not unintentionally detached from the receiving frame body, the security is improved, and in the underground space due to heavy rain, etc. It is possible to prevent flooded rainwater from overflowing to the ground.

  An embodiment of a manhole locking device according to the present invention will be described with reference to FIGS. This manhole locking device is intended to be easily attached to an existing annular receiving frame 20 that is closed by a disc-like lid 10 having a collar 1. 30 and a receiving member 40.

  As shown in FIGS. 2 to 4, the existing receiving frame body 20 protrudes to the outside of the lower frame portion 22 on the ground side and the upper frame portion 21 on the ground side, the lower frame portion 22 on the ground side. The flange 23 to be formed is integrally formed. A space surrounded by the upper frame portion 21 and the lower frame portion 22 is an opening S. The upper frame portion 21 has a slightly larger inner diameter on the ground side than the inner diameter on the ground side, and has an inner peripheral surface tapered. On the other hand, the lid 10 has an outer diameter on the ground side that is slightly larger than the outer diameter on the ground side, and has an outer peripheral surface that is tapered, so that the lid 10 is airtightly and watertightly closed on the receiving frame body 20. Have been able to.

  A plurality of, for example, six arcuate seats 24 protrude from the inner peripheral surface of the boundary portion between the upper frame portion 21 and the lower frame portion 22 as shown in FIG. The lower frame portion 22 is not provided between the pair of seats 24, 24, but a recess 25 is provided. Further, as shown in FIG. 4, projecting pieces 26 a and 26 b projecting in the vertical direction are provided at the center of the inner edge of each seat 24. A recessed portion 27 is formed between the protruding piece 26 b protruding downward and the lower frame portion 22. Further, as shown in FIG. 1, projections 28, 28 projecting upward are provided at both ends of each seat 24.

  The mounting board 30 is fixed to the pair of seats 24, 24. As shown in FIG. 5, the mounting plate 30 is provided with a latching portion 31 disposed at the position of the concave portion 25, and a fixing portion 32 that is provided at both ends of the latching portion 31 and is fixed to the respective seating plates 24 and 24. , 32 are integrally formed. The latching portion 31 is formed by forming a thin flat plate into a mountain shape, and even if a portion for forming a locking hole 12 protruding from the lower surface of the lid 10 is provided in the center portion, it does not collide with this portion. A recessed portion 33 is formed for this purpose. In FIGS. 2 and 3, the portion where the locking hole 12 is formed is formed in a size that does not collide with the hooking portion 31, and therefore the recessed portion 33 is not necessarily formed.

  Each fixing portion 32 includes a thick portion 34 and a thin portion 35. The bottom surface of the thick portion 34 is the same as the bottom surface of the latch portion 31, but the upper surface of the thick portion 34 protrudes from the top surface of the latch portion 31, while the bottom surface of the thin portion 35 is the latch portion. The upper surface of the thin portion 35 is flush with the upper surface of the thick portion 34. The outer peripheral surface of the thin portion 35 protrudes from the thick portion 34 so that the line connecting the outer surface of the both thin portions 35, 35 and the outer surface of the latching portion 31 is close to the inner peripheral surface of the receiving frame 20. ing. Further, the projection 28 is located in a notch portion between the thin portion 35 and the latch portion 31.

  The thin portion 35 is formed with an engagement hole 36 into which the protruding piece 26a protruding upward from the seat base 24 is inserted. Further, two through holes 37 are formed in each thick portion 34. The through hole 37 is composed of an upper large diameter portion 37a and a lower small diameter portion 37b.

  A receiving member 40 is disposed below the seat base 24. As shown in FIG. 6, the receiving member 40 protrudes from the front surface of the fixing plate 41 and the side plate 42 that are substantially L-shaped and the fixing plate 41 on the side provided with the side plate 42 when viewed from the front. It is comprised from the entrance part 43. FIG. As shown in FIG. 4, the fixing plate 41 abuts against the lower end surface of the protruding piece 26 b that protrudes downward from the seating plate 24, and faces the bottom surface of the thick portion 34 of the mounting plate 30 with a gap. To do. In the positional relationship in which the fixed plate 41 faces the thick portion 34, the fixed plate 41 is formed with a pair of through holes 44 and 44 that are continuous with the pair of through holes 37 and 37 of the thick portion 34. A female screw is formed in the through hole 44.

  And the mounting board 30 and the receiving member 40 are fixed by the fastening member 50 in the state which pinched | interposed the seat board 24. FIG. The fastening member 50 is constituted by, for example, a hexagon socket head bolt 51 and a female screw formed on the fixing plate 41 of the receiving member 40. The bolt 51 can be fastened to the female screw with a hexagon wrench (not shown). The head of the bolt 51 is embedded in the large-diameter portion 37 a of the fixed portion 32, so that the head of the bolt 51 does not become an obstacle to the closure of the lid body 10. Since the female screw is formed in the through hole 44 of the receiving member 40, for example, the receiving member 40 can be held with the left hand, and the bolt 51 can be fastened with the hexagon wrench with the right hand. Property can be improved. However, the bolt 51 may be fastened with a nut without forming a female screw in the through hole 44 of the receiving member 40.

  Further, the side plate 42 of the receiving member 40 is for supporting the lid body 10 so that the lid body 10 is not greatly depressed when the seat base 24 is broken, and from the height of the lower frame portion 22. Is also slightly shorter. Note that the receiving member 40 may not be provided with the side plate 42 but may be configured only by the fixing plate 41 and the engaging portion 43.

  Here, a method for assembling the manhole locking device including the mounting board 30 and the receiving member 40 will be described.

  First, the fixing portions 32 and 32 of the mounting board 30 are placed on the pair of seats 24 and 24. At this time, the protruding piece 26a protruding upward from the seating board 24 is fitted into the engagement hole 36 of the mounting board 30, and the mounting board 30 is positioned. For example, the receiving member 40 is disposed on the bottom surface side of the fixing portion 32 of the mounting board 30 while supporting the bottom surface of the fixing plate 41 of the receiving member 40 with the left hand. At this time, the engaging portion 43 of the receiving member 40 enters the recessed portion 27 of the seat base 24, and the through hole 37 formed in the fixing portion 32 and the through hole 44 formed in the fixing plate 41 are continuous.

  Next, hexagon socket head bolts 51 are inserted into the through holes 37 and 44. The tip of the hexagon wrench is fitted into the hexagon hole of the bolt 51 and the hexagon wrench is turned to fasten the bolt 51 to the female screw formed in the through hole 44 of the fixing plate 41. When the bolt 51 is completely fastened with the female screw, the head of the bolt 51 completely enters the large diameter portion 37a of the through hole 37 formed in the fixing portion 32, and the mounting plate 30 and the receiving member 40 are connected. The seating plate 24 is fixed in a sandwiched state, and the assembling work is completed.

  A connector guide (not shown) for connecting the periphery of the lid body 10 is provided on the receiving frame body 20 on the opposite side of the mounting plate 30 and the receiving member 40 thus fixed.

  On the other hand, as the lid body 10, a general-purpose one having a rotatable collar 1 is employed. As shown in FIG. 3, the flange portion 1 is provided in a state of protruding to the side of the bottomed cylindrical rotating cam 2. The rotating cam 2 is attached to the lower end portion of the cam interlocking pin 3, and the direction of the collar portion 1 is changed by the rotation of the cam interlocking pin 3. The cam interlocking pin 3 is inserted into a cylindrical holder 4 with a step. The lower end portion of the cam interlocking pin 3 protrudes from the lower end edge of the holder 4 and is fixed by the nut 5 in the rotating cam 2. The upper end surface of the cam interlocking pin 3 is formed with a recess (not shown) for engaging the opening / closing jig. The upper end surface is covered with a magnet cap 6 that covers the upper end portion of the holder 4, and the magnet cap 6 is covered with a surface cap 7 with a gap.

  The holder 4, the surface cap 7, and the like are housed in a cylindrical holder lock portion 11 with a step projecting downward from the surface at the periphery of the lid 10. A locking hole 12 having a hook is provided on the surface of the lid 10 further outside the holder lock portion 11, and the locking hole 12 is usually closed by a rubber plug 13. The stopper 13 prevents the inside of the locking hole 12 from being clogged with sand or the like and prevents rainwater or the like from accumulating.

  A connector for connecting the connector guide is provided in the peripheral portion of the lid 10 on the side opposite to the locking hole 12.

  The manhole locking device and the manhole to which the locking device is attached in the present embodiment are configured as described above. Next, the lid 1 is positioned below the latching portion 31 of the mounting board 30 and locked. A method for removing the body 10 from the receiving frame 20 will be described.

  First, the surface cap 7 exposed on the upper surface of the holder lock portion 11 of the lid 10 and the magnet cap 6 on the back side of the surface cap 7 are removed. And the front-end | tip part of an opening / closing jig is inserted in the recessed part of the exposed cam interlocking | linkage pin 3, and an opening / closing jig is rotated. Then, the collar part 1 comes off from below the latching part 31. Next, the stopper 13 that closes the locking hole 12 is removed, and the tip of a lever (not shown) is hooked on the hook of the locking hole 12 and lifted upward. Then, the connector-side lid 10 is also lifted by the connector guide, and the lid 10 rises in a horizontal posture. Then, when the lever is rotated clockwise to draw an arc, the lid body 10 is completely detached from the upper frame portion 21 of the receiving frame body 20, and the underground space and the ground space communicate with each other.

  Conversely, when closing the lid 10, the lever is hooked on the hook of the locking hole 12 of the lid 10, and rotates in a counterclockwise direction so as to draw an arc. When the lid body 10 moves until it overlaps the upper frame portion 21 of the receiving frame body 20, the lid body 10 is fitted into the upper frame portion 21. And the front-end | tip part of an opening-and-closing jig is engage | inserted in the recessed part of the cam interlocking | linkage pin 3, and the opening-and-closing jig is rotated, and the collar part 1 is located below a latching | locking part and locked. Then, the upper end portion of the cam interlocking pin 3 is covered with the magnet cap 6, and the upper surface of the holder lock portion 11 is closed with the surface cap 7. Further, when the locking hole 12 is closed with the stopper 13, a series of locking operations are completed.

  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, when the protruding piece 26 a is not provided to protrude upward from the seat base 24 of the receiving frame body 20, the engagement hole 36 may not be formed in the mounting board 30. Further, the mounting board 30 may be fixed to the seat board 24 by, for example, a U-shaped holder that sandwiches the upper surface of the mounting board 30 and the bottom surface of the seat board 24. Furthermore, the manhole is not limited to a circular shape, and can be similarly implemented even if it is a rectangular shape.

The top view which shows one Embodiment of the locking device for manholes in this invention Front sectional drawing which shows one Embodiment of the locking device for manholes in this invention It is one Embodiment of the locking device for manholes in this invention, Comprising: Front sectional drawing to which the XX sectional view part of FIG. 1 was expanded. It is one Embodiment of the locking device for manholes in this invention, Comprising: Front sectional drawing which expanded the YY sectional view part of FIG. It is the mounting board which comprises the locking device for manholes in this invention, Comprising: (a) is a top view, (b) is a front view, (c) is a bottom view, (d) is an AA sectional view. , (E) is a BB line sectional view It is the receiving member which comprises the locking device for manholes in this invention, Comprising: (a) is a top view, (b) is a front view, (c) is a bottom view,

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Butt part 10 ... Lid body 20 ... Frame body 24 ... Seating board 26a ... Projection piece 30 ... Mounting board 31 ... Stopping part 32 ... Fixing part 36 ... Engagement hole 37 ... Through Hole 40 ... Receiving member 44 ... Through hole 50 ... Fastening member S ... Opening

Claims (4)

A locking device for manholes that locks a lid having a rotatable collar in a state where the lid is closed to an opening of a receiving frame having a seat that protrudes on an inner peripheral surface,
A locking device for manholes, comprising a mounting board fixed to a seat base of the frame and provided with a latching part for latching the collar part. A pair of seats of the receiving frame body are provided apart from each other,
2. The manhole locking device according to claim 1, wherein the mounting plate is provided with a pair of fixing portions that overlap the respective seating plates on both sides of the hooking portion. A receiving member that sandwiches the seat of the frame with the fixing portion of the mounting plate;
The through hole which continues in the said fixing | fixed part and a receiving member is formed, and a mounting board and a receiving member are fixed to a seat base by the fastening member which penetrates these both through holes. Locking device for the described manhole. A projecting piece is provided on the seat of the receiving frame body,
4. The manhole locking device according to claim 1, wherein an engagement hole into which the protruding piece is inserted is formed in the fixing portion of the mounting board. 5.