JP4658232B1 - Display device of anchor bolt position in iron cover for underground structure - Google Patents

Abstract

An iron cover for an underground structure can be replaced without cutting or crushing the pavement around a receiving frame, and the position of an anchor bolt can be identified visually inside the underground structure.
As an apparatus for displaying the position of an anchor bolt used to attach a receiving frame for supporting iron lids to an underground structure in an iron cover for an underground structure, on the frame body of the underground structure 1 includes an indicator main body 11 in which one end portion 12 is disposed on the anchor bolt side and the other end portion 13 is disposed on the opening side, and is embedded in the pavement around the receiving frame. A display unit 14 is provided at the other end portion of the display tool main body so as to expose the position of the anchor bolt 18 that cannot be directly seen from the side, on the frame opening side of the underground structure.
[Selection] Figure 1

Description

  The present invention relates to an apparatus for displaying the position of an anchor bolt that is used to attach a receiving frame that supports iron lids to an underground structure in an iron lid for an underground structure.

  If a so-called manhole is left as it is, it will not only defeat its original purpose, but will also be subject to great damage in the event of a disaster such as an earthquake. Among them, the Ministry of Land, Infrastructure, Transport and Tourism issued a notice ("June 19, 2003 National Capital Situation No. 77)" regarding manholes belonging to sewerage facilities. “The facilities subject to national treasury assistance for the renovation are renovations related to the scale of“ small classification ”facilities as defined in the attached table on the assumption that appropriate maintenance management has been performed, and Has passed the number of years specified in the table. Is described. In the attached table, manhole iron covers that are subject to national treasury assistance at the time of reconstruction are stipulated that the elapsed years after laying are 15 years for the roadway (other 30 years). The iron cover for underground structures is exchanged together with the receiving frame that supports and supports the iron cover. However, in the iron cover for underground structures before the 1980s, the receiving frame is placed on the manhole body. Therefore, it can be removed relatively easily by a predetermined construction method. As a construction method therefor, a circular cutting method disclosed in Japanese Patent Application Laid-Open No. 2004-3309, and a lifting method disclosed in Japanese Patent Application Laid-Open No. 2004-332522, which is a kind of circular cutting method, are typical.

  However, an embedded anchor has been installed in the manhole housing body since the 1980s. To prevent the receiving frame from floating or scattering due to the pressure increase inside the manhole, the receiving frame is fastened to the manhole housing body using anchor bolts. Has been. Therefore, to replace the iron cover for underground structures, check in advance whether it is from the 1980s or later, and if it is fastened with an anchor bolt, fix the anchor bolt. It had to be cut or removed. In addition, in the conventional methods other than the circular cutting method disclosed in Japanese Patent Application Laid-Open Nos. 2004-3309 and 2004-332522, the pavement is crushed and the surroundings of the receiving frame are dug back. Can be removed easily. However, pavement cutting and crushing operations are accompanied by large noises and intense vibrations caused by a hitting machine such as a breaker, which causes a problem of inconvenience to neighboring residents.

  On the other hand, according to the construction method of JP2010-144509A, it is not necessary to cut and crush the pavement. Instead, it is necessary to cut the anchor bolt in advance or remove the receiving frame after removing it. There is. Therefore, it is necessary to specify the position of the anchor bolt, but at present, there is no known method for specifying the position of the anchor bolt without cutting and crushing the pavement. Japanese Patent Laid-Open No. 2007-9644 relates to a manhole inner wall cutting machine, and the invention of the same is used for removing an iron cover for an underground structure. However, in general, if the position of the anchor bolts installed at three locations cannot be specified, the inner wall of the manhole must be cut over 360 degrees in order to cut all of them, which is extremely efficient. Not good.

JP 2004-3309 A JP 2004-332522 A JP 2010-144509 A JP 2007-9644

  The present invention has been made paying attention to the above points, and the problem is that an anchor bolt can be used to replace an iron cover for an underground structure without requiring cutting and crushing of the pavement around the receiving frame. Is to be able to identify the position of the inside of the underground structure visually. Further, another object of the present invention is to indicate the position of the anchor bolt as a pin point and to cut it with a minimum of work, so that it is possible to avoid unnecessary noise and vibration around the iron for underground structures. An object of the present invention is to provide an indicator device for an anchor bolt position in a lid.

  In order to solve the above-described problems, the present invention provides an apparatus for displaying the position of an anchor bolt used for attaching a receiving frame that supports iron lids to an underground structure in an iron cover for an underground structure. On the main body of the underground structure, the display body has one end arranged on the anchor bolt side and the other end arranged on the opening side, and is embedded in the pavement around the receiving frame. An anchor bolt that cannot be directly seen from the structure opening side of the structure is displayed on the other end portion of the display device body with a display unit that exposes and displays the position of the anchor bolt on the structure opening side of the underground structure. It is a measure taken.

  The apparatus of the present invention comprises a display body and a display unit provided at the other end. Since the display device main body is one in which one end portion is disposed on the anchor bolt side and the other end portion is disposed on the opening side on the main body of the underground structure, it is disposed in the opening portion of the underground structure. The end indicates the position of the anchor bolt. Since the display unit is a means for exposing and displaying the position of the anchor bolt embedded in the pavement around the receiving frame in the opening of the housing body, it is desirable that the display unit be provided with some display means. As the display means, for example, characters, pictograms, designs, symbols, coloring, or combinations thereof are suitable.

  In the case of a circular manhole, about three anchor bolts are used to fasten the receiving frame, and six to twelve through holes of the anchor bolt are formed in the receiving frame. It is almost impossible to specify the position of the anchor bolt embedded in the mortar without a clue. Therefore, the device of the present invention determines the position of the anchor bolt by the display unit at the other end of the display body. It is derived and shown to the opening side of the frame body of the underground structure. The display body is embedded with anchor bolts by placing concrete mortar in the height adjustment space between the above-mentioned body and the receiving frame, but once the display body is placed in the body of the underground structure After that, the display body need not be exposed. Therefore, the apparatus according to the present invention is constructed during the installation work of the iron cover for underground structures and before the concrete mortar placement.

  The display tool main body and the display part have a substantially L-shaped side surface shape, and the display tool main body has a first engagement part that engages with an anchor bolt at one end, and the opening of the main body of the underground structure It is preferable that the other end portion has a second engaging portion that engages with the edge of the portion or the receiving frame. By having the first engaging portion and the second engaging portion, the position of the display device main body can be engaged and fixed to the anchor bolt and the housing main body. If the display main body is fixed to the main body of the underground structure by the first engaging portion and the second engaging portion, it can withstand a considerable amount of external force applied when placing concrete mortar. The engagement structure by the part and the second engagement part also functions as a measure for preventing the display tool body from shifting when the concrete mortar is placed. The display device of the present invention is finally fixed by concrete mortar.

  The specific form of the engagement is a matter that can be freely selected, but the first engaging portion is caught by the anchor bolt or engaged with and fixed to the anchor bolt. It is desirable that the second engagement portion is formed in an approximately L shape, and the substantially L-shaped inner angle is configured to be caught on the edge of the opening of the frame body of the underground structure or on the receiving frame. Such an engagement configuration is an example of a means for fixing the display device main body to the housing main body side so as not to be easily detached. It is desirable that the first engaging portion has a shape of an elongated hole extending from one end portion of the display tool body toward the other end portion. This is because by providing an adjustment allowance according to the size of the long hole, it becomes possible to respond to a change in the distance between the anchor bolt and the inner surface of the opening of the housing body. The L-shaped portion of the second engaging portion is preferably configured to be caught on the edge of the opening of the housing body, but the concrete mortar thickness to be placed in the height adjustment space is thinner than the L-shaped length. Needless to say, when the situation changes, for example, the L-shaped inner corner can be hooked with the receiving frame.

  Further, it is desirable that at least the display unit of the display tool main body and the display unit is made of any one of a stainless steel plate, a coated steel plate, and a plastic thin plate. The inside of the manhole is generally an environment where the humidity is higher than the outside, and in the case of sewage, the generation of corrosive gas is also predicted, so the entire display device is made of a corrosion-resistant material as described above. Or at least the display portion is subjected to painting, coating, and other corrosion resistance treatment.

  The display part in this invention is one of the elements which comprise the display apparatus main body with the indicator main body. As shown in the embodiments to be described later, this display unit may have a structure using a part of the display tool body, but there is no reason to be limited thereto, and a member different from the display tool body. Of course, a structure in which is attached to the other end can also be adopted.

  Since the present invention is configured and operates as described above, the display unit provided at the other end of the display device main body is provided inside the underground structure without cutting and crushing the pavement around the receiving frame. Therefore, it is possible to specify the position of the anchor bolt in the iron cover for the underground structure and accurately cut only the anchor bolt. In addition, according to the present invention, the anchor bolt position can be pinpointed, and can be cut with a minimum of work, and the anchor bolt in the iron cover for an underground structure that does not cause unnecessary noise and vibration around the periphery. The position display device can be provided.

  Hereinafter, the present invention will be described in more detail with reference to the illustrated embodiments. 1 to 3 show an example 1 of an anchor bolt position display device in an iron lid for an underground structure according to the present invention. 11 is a display tool main body, 12 is disposed at one end of the anchor bolt side, 13 Is arranged at the other end on the opening side of the main body of the underground structure. The display device main body 11 of Example 1 has a strip shape formed of a stainless steel thin plate. In Example 1 shown in the drawing, the other end 13 side of the display device main body 11 is extended to display the display unit 14. Are integrated. Since the display part 14 is provided on the casing body of the underground structure by bending the extended other end part 13 of the display tool body 11 downward, a second engagement part to be described later is accordingly provided. 17 are formed simultaneously. As a result, the display tool body 11 and the display unit 14 form a substantially L-shaped side shape.

  On the side of the one end portion 12 of the display tool main body 11, a slit-like long hole having an elongated shape from the one end portion 12 toward the other end portion 13 is provided as the first engaging portion 15. The long hole of the first engaging portion 15 has a short diameter slightly wider than the outer diameter of the anchor bolt 18 and a long diameter necessary for adjusting the movement of the display main body. A notch having a protrusion 16 with a narrower opening is provided at the entrance of the first engaging portion 15. Since the display tool main body 11 is made of a stainless steel thin plate, the projection 16 of the cut-in opening allows the anchor bolt 18 to pass through elastic deformation when attached. In addition, a substantially L-shaped inner angle that engages with the opening edge portion 19 of the frame main body 20 of the underground structure forms the second engaging portion 17 at the other end portion 13 of the display device main body 11.

  The display unit 14 is provided with a visual display means 14a composed of characters such as “↑ ANCHOR BALT”. As for what the device of the present invention is provided for, it is necessary to describe the purpose of the display since the memory is kept for a certain period after the installation. Since the meaning of the display can be forgotten when the years have passed, it is meaningful to clearly describe the display purpose on the display means 14a. Characters, pictograms, symbols, or combinations thereof are suitable as the display means 14a, and it is naturally necessary to form them using a material that can withstand humidity and corrosive gas. The display unit 14a can be arbitrarily provided by a known method. For example, sticking of a seal describing the display unit 14a, printing of the display unit 14a, stamping by a press, and the like are practical. The anchor bolt position display device 10 of Example 1 according to the present invention includes such a display tool body 11, the display unit 14, the first engagement unit 15, the second engagement unit 17, and the like as elements. .

  4 to 6 show Example 2 relating to the display device 10 'for the anchor bolt position in the iron lid for an underground structure according to the present invention. As apparent from FIG. 4, Example 2 is an oblong oblong hole that is not a notch type of Example 1 as the first engagement portion 22 having an elongated hole shape extending from one end to the other end. It has a configuration. The first engagement portion 22 formed of a long hole in Example 2 also has a short diameter that is slightly wider than the outer diameter of the anchor bolt 18 and a long diameter that is necessary for movement adjustment of the display tool main body. Further, the anchor bolt position display device 10 ′ of Example 2 is configured with the display tool body 11, the display unit 14, the second engagement unit 17, and the like as in Example 1. Reference numerals are used for each element, and detailed description is omitted. The display unit 14 of Example 2 is naturally provided with the above-described display unit 14a.

  In order to use the display device 10 at the anchor bolt position of Example 1 configured as described above, as shown in FIG. 7, the display body 11 is moved from the opening 21 side of the main body 20 of the underground structure. The notch of the first engagement portion 15 is brought closer to the anchor bolt 18 (FIG. 7a). Further, the protrusions 16 and 16 are pushed in while feeling the resistance by the anchor bolts 18 (FIG. 7b), and pressed until the second engagement part 17 is engaged with the corner of the opening edge 19 (FIG. 7c). As a result, the anchor bolt position display device 10 of Example 1 is engaged with the anchor bolt 18 and the housing main body 20 and fixed to the fixed position of the inner wall surface 20b. On the other hand, in order to use the anchor bolt position display device 10 ′ of Example 2, the first engagement portion 22 formed of a long hole must be passed through the anchor bolt 18, so the engagement procedure is slightly different. The treatment after passing through the anchor bolt 18 is exactly the same as in Example 1.

  FIG. 8 shows a state in which the anchor bolt position display device 10 according to Example 1 of the present invention has been placed on the main body 20 of the underground structure. A receiving frame 24 is placed. The anchor bolt 18 is attached to three embedded anchors 20a embedded in the housing body 20, and the receiving frame 24 is fastened by the nut 18a. In FIG. 8, the chassis body 20 is shown as a circular manhole, and three anchor bolts 18 are installed at equal intervals on the annular upper surface of the chassis body 20 at each position relative to the anchor bolts 18. The display device 10 is constructed on the inner wall surface 20b. The height adjusting member 23 is attached to the anchor bolt 18. As described above, six to twelve anchor bolt through holes 24 a (see FIGS. 8 to 10) are formed in the receiving frame 24. In the case of the example, the anchor bolts 18 are passed through the three through holes 24a. Thereafter, the receiving frame 24 of the iron cover for underground structures is installed. FIG. 9 shows a state in which the concrete mortar 25 using the high fluidity mortar has already been driven and waiting for its hardening. In each figure, 26 is an outer formwork, 27 is an inner formwork, and these are removed after the concrete mortar 25 for height adjustment is consolidated.

  Therefore, since the display unit 14 is exposed when the inner mold 27 is removed, the display unit 14 a can be visually observed inside the opening 21 of the housing body 20. FIG. 10 illustrates the state of the display means 14a that is visually observed inside the opening 21. Thus, the position of the anchor bolt 18 can be specified, and only the anchor bolt 18 can be accurately cut. Become. An outline of the anchor bolt cutting operation is shown in FIG. The person who performs the work carries the manhole inner wall cutting machine into the opening 21 of the housing body 20, and pushes the circular saw-shaped cutting blade 28 into the height adjusting concrete 25 'using the display means 14a as a mark, The anchor bolt 18 is cut. Therefore, it is only necessary to cut the portions of the three anchor bolts 18 shown in FIG. In the illustrated example, the display unit 14 is engaged with the opening edge at the L-shaped inner corner of the second engagement unit 17, and the display unit 14 a is adapted downward. However, depending on the situation, the inner corner can be hooked with the receiving frame 24. In such a situation, the display unit 14 is also set as the display means 14a adapted upward.

  By cutting all the anchor bolts 18, the receiving frame 24 of the iron lid for the underground structure is not tightly connected to the housing body 20, and its periphery is simply covered by the pavement 29. That is, if the anchor bolt 18 is cut, the receiving frame 24 of the iron cover for an underground structure is merely placed on the manhole housing body 20 as in the pre-1980s. Therefore, it is possible to easily remove the receiving frame 24 by using the circular cutting method disclosed in Japanese Patent Application Laid-Open Nos. 2004-3309 and 2004-332522, which causes large noise and intense vibration during the removal work. Nor.

  In the display device for the anchor bolt position in the iron cover for an underground structure according to the present invention, as described above, all the anchor bolts 18 can be cut at a pinpoint. In many cases, three anchor bolts 18 are installed at equal intervals. Even if one or two display portions 14 are damaged during operation of the manhole, if one remains, it is necessary to fix it. Since it can be used as a cue to specify the remaining anchor bolt positions, it is highly effective. However, the number of anchor bolts 18 is not limited to three, and the position of the anchor bolts 18 is not known. Therefore, according to the present invention, it is meaningful to accurately display the position of the anchor bolts 18.

It is a perspective view which shows Example 1 of the display apparatus of the anchor bolt position in the iron cover for underground structures based on this invention. It is a top view of an apparatus same as the above. It is a side view similarly. It is a perspective view which similarly shows Example 2 of the display apparatus which concerns on this invention. It is a top view of an apparatus same as the above. It is a side view similarly. It is explanatory drawing which shows the example of attachment of the display apparatus which similarly concerns on this invention later on process a, b, c. It is a top view which similarly shows the example of attachment of the display apparatus which concerns on this invention. It is a section explanatory view showing the construction state of the display concerning the present invention similarly. It is explanatory drawing which similarly shows the apparatus after the construction which concerns on this invention from an opening part inner side. It is a section explanatory view showing the example of the cutting construction of the anchor bolt which similarly used the device after construction concerning the present invention.

10, 10 'Display device of anchor bolt position in iron cover for underground structure 11 Display tool body 12 One end portion 13 Other end portion 14 Display portion 14a Display means 15, 22 First engagement portion 16 Projection portion of cut opening 17 First 2 engaging portion 18 anchor bolt 19 opening edge 20 frame body 21 opening 23 height adjusting member 24 receiving frame 25 concrete mortar 26 outer mold frame 27 inner mold frame 28 cutting blade 29 pavement

Claims (4)

In an iron cover for an underground structure, a device that displays the position of an anchor bolt that is used to attach a receiving frame that supports iron lids to the underground structure,
On the main body of the underground structure, the display device main body has one end arranged on the anchor bolt side and the other end arranged on the opening side,
The display part of the display body that displays the position of the anchor bolt that is buried in the pavement around the receiving frame and cannot be directly seen from the opening side of the underground structure, exposed on the opening side of the underground structure. An anchor bolt position display device having a configuration provided at the other end. The display tool main body and the display part have a substantially L-shaped side surface shape, and the display tool main body has a first engagement part that engages with an anchor bolt at one end, and the substantially L-shaped inner corner is underground. The display apparatus of the anchor bolt position in the iron cover for underground structures of Claim 1 which comprises the 2nd engaging part engaged with the opening edge part or receiving frame of the housing main body of a structure. The display device of the anchor bolt position in the iron lid for underground structures according to claim 2, wherein the first engagement portion has a shape of an elongated hole extending from one end of the display tool body toward the other end. The display device of the anchor bolt position in the iron lid for underground structures according to claim 1, wherein at least the display portion of the display tool body is made of any one of a stainless steel plate, a coated steel plate, and a plastic thin plate.

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