JP2000234612A - Corrosion prevention structure for fastening place - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain reliable corrosion protective condition of a fastening place, by preventing a corrosion protective cap from dropping off without requiring much labor. SOLUTION: The base board 35 of a latch 34 is fixed by gluing in a head 24b of a bolt 24 fastening bridge boards 21 of a segment. A bolt side corrosion protective cap 31B is filled with a filling material 33 and covers the head 24b, a latching bar 36 is inserted into a latching bar inserting hole 32, the projecting latching bar 36 is bent so as to be latched. A nut side corrosion protective cap 31B is filled with the filling material 33 and covers a fastening nut 25 connected to the bolt 24, an external thread portion 24a is inserted into an external thread inserting hole 30, a holding nut 41a is screwed into the projecting external thread portion 24a so as to hold the nut side corrosion protective cap 31B. A supporting nut 41b attaching a supporting board 12 is screwed into the external thread portion 24a, and is fixed with the supporting board 12 supported by the holding nut 41a and the supporting nut 41b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anticorrosion structure at a fastening position by a bolt, a nut or the like.

[0002]

2. Description of the Related Art Generally, segments constituting a tunnel or the like are joined to each other by bolts and nuts.
Further, in such underground structures such as tunnels, bolts and nuts are easily corroded by groundwater or the like, and therefore, fastening portions of these bolts and nuts are protected from corrosion. As this anticorrosion structure, for example, a head of the bolt and a nut fastened to the bolt are covered with an anticorrosion cap made of a material having excellent corrosion resistance such as stainless steel, and the inside is filled with a filler such as mortar, The head and the nut are covered with a filler.

[0003]

By the way, especially at the ceiling inside a tunnel or the like, the surfaces of the bolts and nuts and the inner surface of the anticorrosion cap are prevented so that the anticorrosion cap does not peel off from the filler and fall off. To increase the adhesion to the filler, or to use expensive resin mortar with adhesive as the filler, and frequently check the fastening points, which requires a great deal of labor. And there is a problem that the cost is increased.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an anticorrosion structure at a fastening portion at which a large amount of labor is not required, the cost is low, and the anticorrosion cap does not fall off. And

[0005]

In order to achieve the above object, the anticorrosion structure at the fastening point according to claim 1 is provided in an anticorrosion cap provided so as to surround a fastener for fastening the structures. By filling a filler, the periphery of the fastener is an anticorrosion structure at a fastening portion that is sealed with the filler, and the anticorrosion cap is fastened to the fastener by a fastener. , The fastener is a base plate adhered and fixed to the fastener,
A locking rod provided on the base plate and inserted into an insertion hole formed in the anticorrosion cap to lock the anticorrosion cap on an outer surface side of the anticorrosion cap.

[0006] As described above, the anticorrosion cap filled with the filler that covers and protects the fastener is locked by the locking rod of the fastener that fixes the base plate to the fastener. The anticorrosion cap is securely prevented from falling off. In this way, particularly when the fastening point is on the upper part of the traveling path of a vehicle such as a train or an automobile, the inconvenience of hindering the traveling of the vehicle due to the falling off of the anticorrosion cap is reliably prevented. Further, it is possible to reduce a complicated operation such as always checking a fastening position.

According to a second aspect of the present invention, there is provided the anticorrosion structure at the fastening point according to the first aspect, wherein the fastener includes a bolt inserted into an insertion hole formed in each structure, and the bolt. The corrosion prevention cap is fastened to the head side of the bolt by the fastener, and the tip of the bolt is formed on the corrosion prevention cap on the fastening nut side. The bolt is inserted into the insertion hole and protrudes, and a retaining nut is screwed into a portion of the bolt protruding from the anticorrosion cap, and the anticorrosion cap is held by the retaining nut.

That is, at the place where the bolt and the fastening nut are fastened, the tip of the bolt is inserted into the insertion hole of the anticorrosion cap, and the holding nut is screwed into the inserted bolt. Is held, the falling off of the anticorrosion cap on the fastening nut side is reliably prevented.

According to a third aspect of the present invention, there is provided an anticorrosion structure at a fastening point according to the second aspect, wherein the bolt protrudes from the anticorrosion cap via the holding nut through various facilities. And a holding nut for holding and fixing the support plate together with the holding nut is screwed on the front end side.

As described above, since the support plate is sandwiched and fixed by the holding nut and the holding nut, the fastening force for fastening and fixing the support plate does not act on the anticorrosion cap. Deformation of the anticorrosion cap and damage to the filler due to a large force applied to the cap are reliably prevented, and the anticorrosion cap is prevented from falling off.

According to a fourth aspect of the present invention, there is provided the anticorrosion structure at the fastening point according to the third aspect, wherein the structure comprises a plurality of segments that form a tunnel by being connected in a circumferential direction and an axial direction. An overhead line for a vehicle running in the tunnel is axially supported by the support plate.

That is, at a fastening position where a support plate for supporting a vehicle overhead wire is fastened and fixed to a fastener consisting of a bolt and a fastening nut for joining the segments constituting the tunnel, the anticorrosion cap for protecting the fastening location is provided. Since the falling-off is prevented, the vehicle can always run satisfactorily. Further, it is not necessary to monitor whether or not the anticorrosion cap has fallen off on the traveling path of the vehicle, thereby reducing the labor required for monitoring.

According to a fifth aspect of the present invention, there is provided the anticorrosion structure at the fastening portion according to any one of the first to fourth aspects, wherein the locking rod of the fastener is provided with a hole extending from the insertion hole. The anticorrosion cap is locked by bending the protruding portion. That is, only by bending the locking bar of the fastener that protrudes from the insertion hole of the anticorrosion cap, the anticorrosion cap is extremely easily supported by the fastener and prevented from falling off.

According to a sixth aspect of the present invention, there is provided the anticorrosion structure at the fastening portion according to any one of the first to fifth aspects, wherein the locking rod of the fastener is provided with a threaded portion on its outer periphery. Is formed, and the anticorrosion cap is locked by screwing a locking nut into a protruding portion of the locking rod from the insertion hole. As described above, by screwing the locking nut to the locking rod of the fastener that protrudes from the insertion hole of the anticorrosion cap, the anticorrosion cap is very easily supported by the fastener and its drop-off is prevented. .

According to a seventh aspect of the present invention, there is provided the anticorrosion structure at the fastening point according to any one of the first to fifth aspects, wherein the base plate of the fastener is attached to the fastener. It is characterized in that a plurality of holes through which the adhesive is passed are formed at the time of bonding. In other words, when the base plate is bonded and fixed to the fastener with the adhesive, the adhesive is pushed out to the surface side from the plurality of holes formed in the base plate, so that the adhesive is reliably cut into the base plate. And a secure fixing state of the fastener to the fastener is obtained.

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an anticorrosion structure according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a tunnel, in which a rail 2 on which a vehicle travels is laid. The tunnel 1 is constructed by connecting arc-shaped segments (structures) 6 in a circumferential direction and an axial direction.

In the tunnel 1, an overhead wire 11 for supplying power to the vehicle is provided in an upper portion thereof along the axial direction. The overhead wire 11 is a support plate 1 fixed to the tunnel 1.
The support 2 is supported via an insulator 14 on a support bracket 13 horizontally supported in a direction orthogonal to the axial direction by the support 2.

Next, the joint structure of the segments 6 in the upper part of the tunnel 1 in the axial direction will be described. In FIG. 2, reference numeral 21 denotes a main girder plate constituting the segment 6, and by joining these main girder plates 21, the segments 6 are connected in the axial direction. In the main girder plate 21 of the segments 6 connected to each other, communication holes 22 communicating with each other are formed.
2, a male thread 24a of a bolt (fastener) 24 is inserted from one side via a washer 23. And
A fastening nut (fastener) 25 is screwed into the external thread portion 24 a of the bolt 24 via a washer 23.

That is, by inserting the external thread portion 24a of the bolt 24 into the communication hole 22 and screwing the fastening nut 25 into the external thread portion 24a, the main girder plates 21 of the respective segments 6 are fastened to each other. Fixed.

The bolt 24 including the washer 23 has a head 24b covered with a bolt-side anticorrosion cap (anticorrosion cap) 31A.
The nut 25 for fastening including the washer 23 is covered with a nut-side anticorrosion cap (anticorrosion cap) 31B.
Each of the bolt-side anticorrosion cap 31A and the nut-side anticorrosion cap 31B is, for example, bowl-shaped and formed of a material having excellent corrosion resistance such as stainless steel.
As shown in FIG. 3 and FIG.
5A and 6A, a locking rod insertion hole (insertion hole) 32 is formed at the center of the bottom thereof. As shown in FIGS. 5 and 6, the nut-side anticorrosion cap 31B has a male screw at the center of the bottom thereof. An insertion hole (insertion hole) 30 is formed.

Then, these bolt-side anticorrosion caps 31
A and the nut side anticorrosion cap 31B have
The filler 33 is filled, and the filler 33 covers the head 24b of the bolt 24 including the washer 23, a part of the external thread portion 24a of the bolt 24, and the periphery of the fastening nut 25 including the washer 23. I have.

The bolt 24 is provided with a fastener 34 on the end face of the head 24b. This fastener 34
Has a base plate 35 and a locking bar 36 erected at the center of the base plate 35, as shown in FIG.
A plurality of holes 37 are formed in the base plate 35.
The fastener 34 is used to connect the base plate 35 to the bolt 24.
Is fixed to the end face of the head 24b by an adhesive, and the locking rod 36 of the fastener 34 is inserted into the locking rod insertion hole 32 of the bolt-side anticorrosion cap 31A.
The tip side is bent. The bent portion of the locking bar 36 outside the bolt-side anticorrosion cap 31A is covered with an adhesive 33a around the bent portion.

The nut-side anticorrosion cap 31B has a male screw insertion hole 30 into which the male screw portion 24a of the bolt 24 is inserted, and protrudes outside the nut-side anticorrosion cap 31B. The support plate 12 is attached to the external thread portion 24a of the bolt 24 protruding from the nut-side anticorrosion cap 31B. That is, the external thread portion 24 a of the bolt 24 is inserted into the insertion hole 12 a formed in the support plate 12. The holding nut 41a and the holding nut 41 are attached to the male screw portion 24a via the support plate 12.
b is screwed together, and the support plate 12 is clamped and fixed from both sides by the holding nut 41a and the clamping nut 41b. The nut side anticorrosion cap 31
The holding nut 41a on the B side is arranged in a state of contact with the nut side anticorrosion cap 31B.

Next, at the place where the main girder plates 21 of the segments 6 are fastened to each other, the support plate 1 for supporting the anticorrosion and the overhead wire 11 is provided.
2 will be described. (Attaching of the bolt-side anticorrosion cap 31A) First, the fasteners 34 are fixed to the end surfaces of the heads 24b of the bolts 24 by bonding the base plate 35 with an adhesive.

Here, the base plate 35 of the fastener 34
Is formed with a plurality of holes 37, so that when the bolt 24 is bonded to the head 24b with the adhesive, the adhesive sandwiched between the bonding surfaces of the base plate 35 and the head 24b is removed from the holes 37. It is pushed out to the surface side of the base plate 35. That is, the adhesive extruded from the hole 37 toward the surface of the base plate 35 increases the biting force of the adhesive into the base plate 35, and the head 24b of the base plate 35
The adhesive strength to the head 2 is greatly improved,
4b.

The adhesive is hardened and the fastener 34 is
After being fixed to the head 24b of No. 4, the bolt-side anticorrosion cap 31A containing the filler 33 therein is put on the head 24b of the bolt 24 including the washer 23. At this time, the locking rod insertion hole 32 of the bolt side anticorrosion cap 31A is used.
Then, the locking bar 36 of the attachment fitting 34 is inserted.

By doing so, the periphery of the washer 23 and the head 24b of the bolt 24 is gradually covered with the filler 33, and furthermore, between the bolt-side anticorrosion cap 31A and the main girder plate 21 and the bolt-side anticorrosion cap 31A. The filler 33 protrudes from the locking rod insertion hole 32, and the head 24 b of the washer 23 and the bolt 24 and the bolt-side anticorrosion cap 3
1A is completely sealed by the filler 33.
The protruding filler 33 is removed before curing. When the filler material 33 is cured, the bolt-side anticorrosion cap 3
Fastener 34 protruding from 1A locking rod insertion hole 32
Is bent, and an adhesive 33a is attached so as to cover the bent locking bar 36.

(Mounting of Nut-Side Corrosion Protection Cap 31B) A filler 33 is placed inside the nut-side corrosion protection cap 31B.
It is put on from the tip side of male screw part 24a. At this time, the nut side anticorrosion cap 31B male screw insertion hole 30
, The male thread portion 24a of the bolt 24 is inserted.

In this way, a part of the external thread portion 24a of the bolt 24, the washer 23 and the periphery of the fastening nut 25 are gradually covered with the filler 33, and the nut-side anticorrosion cap 31B and the main girder plate 21 are further covered. And the nut-side anticorrosion cap 31B through the male screw insertion hole 30 through the filler 33
The protrusion, a part of the male screw portion 24a, the washer 23, and the space between the fastening nut 25 and the nut-side anticorrosion cap 31B are completely sealed by the filler 33. The protruding filler material 33 and the filler material 33 adhered to the external thread portion 24a of the bolt 24 are removed before curing.

(Mounting of the support plate 12) Male thread portion 24a of the bolt 24 protruding from the nut-side anticorrosion cap 31B.
Then, the retaining nut 41a is screwed into the nut, brought into contact with the nut-side anticorrosion cap 31B, and lightly tightened. After that, when the filler material 33 is hardened, the support plate 12 is attached to the external thread portion 24a of the bolt 24 so that the insertion hole 12a is inserted into the external thread portion 24a. And the external thread 2 of the bolt 24
A holding nut 41b is screwed into 4a, and the holding nut 41b is tightened to the support plate 12 side.

Thus, the support plate 12 is clamped and fixed by the holding nuts 41a and the holding nuts 41b on both sides thereof. Even if the holding nut 41b on the distal end side of the external thread portion 24a is tightened, the support plate 1
The holding nut 41 is provided on the nut side anticorrosion cap 31B side of No. 2.
a, the tightening force is not applied to the nut-side anticorrosion cap 31B, so that the nut-side anticorrosion cap 31B is not deformed by the tightening force, and the filler 33 is not broken. .

As described above, according to the anticorrosion structure at the above-mentioned fastening portion, the periphery of the bolt 24 and the fastening nut 25 are covered and sealed by the filler 33, respectively. Fastening nut 2
5 can be reliably prevented, and is extremely effective particularly in a place easily affected by groundwater such as a subway tunnel. Moreover, on the bolt 24 side, a bolt-side anticorrosion cap 3 in which a filler 33 covering the head 24b of the bolt 24 and protecting the bolt 24 is filled.
Since the base plate 35 is locked by the locking bar 36 of the fastener 34 fixed to the head 24b of the bolt 24, the base plate 35 can reliably prevent the bolt-side anticorrosion cap 31A from falling off.

On the side of the fastening nut 25, a nut-side anticorrosion cap 31B, which is filled with a filler 33 for covering and fastening the fastening nut 25, is screwed into the male thread portion 24a of the bolt 24. The nut-side anticorrosion cap 31 is held by the holding nut 41a.
B can be reliably prevented from falling off.

Thus, the bolt-side anticorrosion cap 31
A. It is possible to reliably prevent inconvenience such as hindrance to the running of the vehicle due to the nut-side anticorrosion cap 31B falling off, and to always check the fastening points to prevent the falling off. Alternatively, it is possible to reduce complicated work such as monitoring whether or not the bolt-side anticorrosion cap 31A and the nut-side anticorrosion cap 31B have fallen on the rail 2, thereby reducing the labor required for these operations.

Further, since the support plate 12 fixed to the external thread portion 24a of the bolt 24 is clamped and fixed by the holding nut 41a and the clamping nut 41b, the fastening force for fastening the support plate 12 is reduced by the nut. Side protection cap 31B
This prevents deformation of the nut-side anticorrosion cap 31B due to a large force being applied to the nut-side anticorrosion cap 31B and breakage of the filler material 33, while preventing the nut-side anticorrosion cap 31B from acting. Dropout can be prevented.

Further, the locking rod 3 of the fastener 34 protruding from the locking rod insertion hole 32 of the bolt-side anticorrosion cap 31A.
By simply bending the bolt 6, the bolt-side anticorrosion cap 31 </ b> A can be very easily supported by the fasteners 34 and prevented from falling off. Also, the base plate 3 of the fastener 34
5 is fixed to the head 24b of the bolt 24 with an adhesive, a plurality of holes 3 formed in the base plate 35.
The adhesive is pushed out to the front side from 7, and the adhesive hardens to a state where the adhesive has been reliably etched into the base plate 35, so that the bolt 24 of the fastener 34 can be securely fixed to the head 24b.

Next, another example of the anticorrosion structure using the bolt-side anticorrosion cap 31A will be described. As shown in FIG. 8, a fastener 45 is provided on the end face of the head 24b of the bolt 24. As shown in FIG. 9,
It has a base plate 46 and a locking bar 47 made of a male screw that stands upright at the center of the base plate 46, and a plurality of holes 48 are formed in the base plate 46. The fastener 45 also has its base plate 46 adhered to the end surface of the head 24b of the bolt 24 with an adhesive, and the locking rod 47 of the fastener 45 is attached to the bolt-side anticorrosion cap 31.
A is inserted into the lock rod insertion hole 32 of FIG. As shown in FIGS. 10 and 11, the locking rod insertion hole 32 of the bolt-side anticorrosion cap 31 </ b> A has a diameter that allows the locking rod 47 formed of a male screw of the fastener 45 to be inserted.

A washer 49 is attached to the locking rod 47 of the fastener 45 projecting from the bolt-side anticorrosion cap 31A.
And a cap nut (locking nut) 50 is screwed through. In other words, the bolt-side anticorrosion cap 31A is fastened and fixed to the fastener 45 by the cap nut 50, thereby preventing the cap 31A from dropping off.

Next, the case where the bolt-side anticorrosion cap 31A is attached using the above-mentioned fastener 45 will be described. First, the fastener 45 is fixed to the end face of the head 24b of the bolt 24 by bonding the base plate 46 thereof with an adhesive. Here, since a plurality of holes 48 are also formed in the base plate 46 of the fastener 45, when the bolt 24 is bonded to the head 24b with an adhesive, the bonding between the base plate 46 and the head 24b is performed. The adhesive sandwiched between the surfaces is extruded from the hole 48 toward the surface of the base plate 46. In other words, the base plate 4
6, the base plate 4
6, the adhesive strength to the head 24b is greatly improved, and the fastener 45 is securely fixed to the head 24b.

The adhesive is cured, and the fastener 45 is attached to the bolt 2
After being fixed to the head 24b of No. 4, the bolt-side anticorrosion cap 31A containing the filler 33 therein is put on the head 24b of the bolt 24 including the washer 23. At this time, the locking rod insertion hole 32 of the bolt side anticorrosion cap 31A is used.
Then, the locking bar 47 of the attachment 45 is inserted. afterwards,
Fastening bracket 45 protruding from bolt side anticorrosion cap 31A
The washer 49 is attached to the locking bar 47 of the above, and the cap nut 50 is further screwed and tightened. By doing so, the periphery of the washer 23 and the head 24b of the bolt 24 are completely sealed by the filler 33, and the fastener 45
Thereby, the bolt side cap 31A is securely fastened and fixed.

As described above, even when the fastener 45 is used, the locking rod insertion hole 3 of the bolt-side anticorrosion cap 31A is used.
By screwing the cap nut 50 to the locking rod 47 of the fastener 45 protruding from the bolt 2, the bolt-side anticorrosion cap 31A can be very easily supported by the fastener 45 and prevented from falling off. .

In the above example, the external thread 24a is
A support plate 12 for supporting the overhead wire 11 was attached,
When the support plate 12 is not attached, as shown in FIG.
Screw. Then, the holding nut 41a is tightened to such an extent that no excessive force is applied to the nut-side anticorrosion cap 31B and the filler 33, that is, to such an extent that they are not deformed or damaged.

In the above example, the fastening structure in the triple tunnel 1 constituting the subway station has been described. However, it is needless to say that the present invention can be applied to any place where anticorrosion is required at the fastening location. is there. In addition, as the fastening point where the above anticorrosion structure is provided, any fastening point where corrosion by water such as groundwater needs to be prevented can be applied. As the filler 33, a resin mortar having excellent adhesiveness is preferable, but ordinary mortar may be used. In this case, the head 24 b of the bolt 24 covered by the filler 33, the washer 23, and the fastening nut 25 are used. It is preferable that an adhesive is applied to the surface of the base and the inner surfaces of the bolt-side anticorrosion cap 31A and the nut-side anticorrosion cap 31B.
Further, before mounting the bolt-side anticorrosion cap 31A and the nut-side anticorrosion cap 31B, the filler 33
Is filled, but the filler 33 may be filled after these are mounted.

[0044]

As described above, according to the anticorrosion structure of the present invention, the following effects can be obtained. According to the anticorrosion structure at the fastening portion according to the first aspect, the anticorrosion cap, which is filled with a filler that covers and protects the fastener, is used as the locking rod of the fastener with the base plate fixed to the fastener. Since the cap is locked, the anticorrosion cap can be reliably prevented from falling off. Thereby, particularly when the fastening portion is on the upper part of the traveling path of a vehicle such as a train or an automobile, it is possible to reliably prevent the inconvenience that the traveling of the vehicle is hindered due to the falling off of the anticorrosion cap. In addition, it is possible to reduce the troublesome work of always checking the fastening points.

According to the second aspect of the present invention, the tip of the bolt is inserted into the insertion hole of the anticorrosion cap at the location where the bolt and the fastening nut are used, and the holding nut is inserted into the inserted bolt. Since the anticorrosion cap is screwed and held by the holding nut, it is possible to reliably prevent the anticorrosion cap from falling off on the fastening nut side.

According to the anticorrosion structure at the fastening portion according to the third aspect, the support plate is sandwiched and fixed by the holding nut and the holding nut, so that the fastening force for fastening and fixing the support plate is applied to the anticorrosion cap. As a result, deformation of the anticorrosion cap due to a large force applied to the anticorrosion cap, breakage of the filler, and the like can be reliably prevented, and the anticorrosion cap can be prevented from falling off.

According to the anticorrosion structure at the fastening point, the support plate for supporting the overhead wire for the vehicle is fastened and fixed to the fastener consisting of the bolt and the fastening nut for joining the segments constituting the tunnel. At the fastening location, the anticorrosion cap for preventing corrosion of the fastening location is prevented from falling off, so that the vehicle can always run satisfactorily. Further, it is not necessary to monitor whether or not the anticorrosion cap has fallen on the rail, so that the labor required for monitoring can be reduced.

According to the anticorrosion structure at the fastening point according to the fifth aspect, the anticorrosion cap is extremely easily supported on the fastener by simply bending the locking bar of the fastener which protrudes from the insertion hole of the anticorrosion cap. This can prevent the falling off.

According to the anticorrosion structure at the fastening portion according to the sixth aspect, the locking nut is screwed into the locking rod of the fastener which protrudes from the insertion hole of the anticorrosion cap, so that the anticorrosion cap can be extremely easily mounted. It can be supported by a fastener and prevented from falling off.

According to the anticorrosion structure at the fastening portion, when the base plate is adhered and fixed to the fastener with the adhesive, the adhesive is pushed out to the surface side from the plurality of holes formed in the base plate. As a result, the adhesive hardens to a state in which the adhesive has reliably eroded the base plate, and a secure fixing state of the fastener to the fastener can be obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a double-track tunnel illustrating an anticorrosion structure at a fastening point according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a fastening portion for explaining an anticorrosion structure at the fastening portion according to the embodiment of the present invention.

FIG. 3 is a front view of a bolt-side anticorrosion cap used in the anticorrosion structure at a fastening portion according to the embodiment of the present invention.

FIG. 4 is a sectional view of a bolt-side anticorrosion cap used in an anticorrosion structure at a fastening portion according to the embodiment of the present invention.

FIG. 5 is a front view of a nut-side anticorrosion cap used in the anticorrosion structure at a fastening portion according to the embodiment of the present invention.

FIG. 6 is a sectional view of a nut-side anticorrosion cap used in the anticorrosion structure at a fastening portion according to the embodiment of the present invention.

FIG. 7 is a perspective view of a fastener used in the anticorrosion structure at a fastening portion according to the embodiment of the present invention.

FIG. 8 is a cross-sectional view of a fastening portion for explaining a corrosion prevention structure at a fastening portion according to another embodiment of the present invention.

FIG. 9 is an exploded perspective view of a fastener used for an anticorrosion structure at a fastening portion according to another embodiment of the present invention.

FIG. 10 is a front view of another bolt-side anticorrosion cap used in the anticorrosion structure at a fastening portion according to the embodiment of the present invention.

FIG. 11 is a cross-sectional view of another bolt-side anticorrosion cap used in the anticorrosion structure at a fastening portion according to the embodiment of the present invention.

FIG. 12 is a cross-sectional view of a fastening point for explaining another example of the structure on the nut side in the anticorrosion structure at the fastening point according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tunnel 6 Segment (structure) 11 Overhead wire 12 Support plate 24 Bolt (fastening tool) 25 Fastening nut (fastening tool) 30 Male screw insertion hole (insertion hole) 31A Bolt side anticorrosion cap (anticorrosion cap) 31B Nut side anticorrosion cap (Anti-corrosion cap) 32 Locking rod insertion hole (insertion hole) 33 Filler 34, 45 Fastening bracket 35, 46 Base plate 36, 47 Locking rod 37, 48 Hole 41a Holding nut 41b Nipping nut 50 Cap nut (Locking nut)

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Seimei Nishibayashi 3-19-6 Higashi-Ueno, Taito-ku, Tokyo Imperial High-speed Transportation Corporation (72) Inventor Shikibu Kumche 3--19, Higashi-Ueno, Taito-ku, Tokyo No. 6 Inside the Teito High-speed Transportation Corporation (72) Inventor Yoshitaka Masuda 3-30-30 Sekicho Minami, Nerima-ku, Tokyo Concrete Calling Co., Ltd. F-term (reference) 4K062 AA10 FA18 GA10

Claims (7)

[Claims] An anticorrosion cap is provided so as to surround a fastener for fastening structures, and a filler is filled in the anticorrosion cap, and corrosion prevention is performed at a fastening portion where the periphery of the fastener is sealed with the filler. In the structure, the anticorrosion cap is fastened to the fastener by a fastener, and the fastener is provided on the base plate adhered and fixed to the fastener, and provided on the base plate. And a locking rod that is inserted into an insertion hole formed in the anticorrosion cap and locks the anticorrosion cap on the outer surface side of the anticorrosion cap. 2. The fastener comprises a bolt inserted into an insertion hole formed in each structure, and a fastening nut screwed onto the bolt. The anticorrosion cap is fastened by metal fittings, and on the fastening nut side, the tip of the bolt is inserted into an insertion hole formed in the anticorrosion cap and protrudes, and the bolt protrudes from the anticorrosion cap. The anticorrosion structure at a fastening point according to claim 1, wherein a holding nut is screwed together, and the anticorrosion cap is held by the holding nut. 3. A support plate for supporting various facilities is provided on a portion of the bolt protruding from the anticorrosion cap via the holding nut, and further, at a tip end side, together with the holding nut. 3. A holding nut for holding and fixing the support plate by screwing.
Anticorrosion structure at the described fastening points. 4. The structure is composed of segments forming a tunnel by connecting a plurality of structures in a circumferential direction and an axial direction, and the overhead wire for a vehicle traveling in the tunnel is extended in the axial direction of the tunnel by the support plate. The anticorrosion structure at a fastening point according to claim 3, wherein the anticorrosion structure is supported. 5. The locking rod of the fastener according to claim 1, wherein the anticorrosion cap is locked by bending a protruding portion from the insertion hole. 3. The anticorrosion structure at the fastening point according to claim 1. 6. The anticorrosion prevention by forming a threaded portion on the outer periphery of the locking rod of the fastener, and screwing a locking nut onto a protruding portion of the locking rod from the insertion hole. The cap is locked.
The anticorrosion structure at the fastening point according to any one of the above. 7. The base plate of the fastener according to claim 1, wherein the base plate has a plurality of holes through which the adhesive passes when the fastener is bonded to the fastener. 3. The anticorrosion structure at the fastening point according to claim 1.