JP2007314977A - Expansion and contraction gap covering structure of wall balustrade - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a covering structure, easily coping with breakage and deterioration of a cover plate in covering the expansion and contraction gap of the wall balustrade under a strict condition with a cover plate. <P>SOLUTION: In a first expansion and contraction gap covering structure, the cover plate 10 formed to be conformable to the sectional shape of the wall balustrade is constructed to cover the expansion and contraction gap on the wall balustrades 7, 8 opposite to each other with the expansion and contraction gap 9 interposed between them, and the cover plate is fixed to one wall balustrade of the wall balustrades. In a second expansion and contraction gap covering structure, recessed parts 39, 40 conformable to the thickness of the cover plate 10 and allowing the movement of the cover plate 10 when the wall balustrades expand and contract are formed at least on the inner surfaces 15, 16 of the wall balustrades in the first structure, the cover plate 10 formed to be conformable to the sectional shape in the recessed part of the wall balustrade is constructed on the wall balustrade to cover the expansion and contraction gap in the recessed part, and the cover plate is fixed to the other balustrade with the moving gap left in the recessed part of one wall balustrade. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a stretchable gap covering structure for a wall rail of a bridge such as a railway bridge or a road bridge.

The wall rails are provided with expansion / contraction gaps corresponding to the expansion / contraction gaps of the bridge floor slab, and adapt to expansion and contraction of the wall rails due to temperature changes. A protective tube for a cable for communication or the like is embedded in the wall rails over the entire length, and the cable penetrates the protective tube. Since this cable is exposed to the air through a telescopic gap in the railing and exposed to wind and rain, measures are taken to prevent it. Furthermore, it is also proposed to provide a cover to cover the stretchable space of the wall rail (Japanese Patent Laid-Open No. 2003-1).
94271).
JP 2003-194271 A

  The cover disclosed in Japanese Patent Application Laid-Open No. 2003-194271 is expressed as “lid member 14” in the description of paragraph 0026 of the publication. “Furthermore, since the connecting member 6 is disposed in the buffer portion 13 of the bridge and is exposed to the outside air, the lid can close the upper surface opening and the left and right side openings of the buffer portion 13. By attaching the member 14 to the outside of the buffer portion 13, it is possible to better prevent the deterioration of the connecting member 6 and consequently the bellows tube 3. The “lid member (cover) 14” is indicated by an imaginary line in FIGS.

The “lid member (cover) 14” shown here is merely “attached to the outside of the buffer portion 13”, and no specific attachment method is disclosed. As the cover of the wall railing expansion / contraction gap used under severe conditions exposed to wind and rain in the open air, the maximum measures should be taken for its maintenance, but there is no technical disclosure about it, There is no suggestion.
In the present invention, when covering the expansion / contraction gap of the wall rail under such severe conditions with the cover plate, it is intensively studied what kind of configuration the covering structure can cope with when the cover plate is damaged or deteriorated. And it was completed.

  According to the first wall rail of the present invention, the cover structure for covering the stretch gap is formed by covering a cover plate formed so as to conform to the cross-sectional shape of the wall rail with the wall gap facing the sandwich of the stretch gap. It is constructed, and the cover plate is fixed to one wall height column of the wall height column.

  Since the cover plate conforms to the cross-sectional shape of the wall rail, if the cover plate is installed on the opposite wall height columns on both sides of the expansion gap so as to cover the expansion gap, the inner surface of the cover plate Stable deposition is possible by being in close contact with the top surface, outer surface and inner surface. The cover plate is fixed to one wall height column with bolts. Since the other wall rail and the cover plate are relatively free to move, they are not affected by the expansion and contraction of the wall rail. If a countersunk bolt is used for the bolt, it does not protrude from the cover plate, so it is safe in the event of a collision and can be prevented from being removed by mischief.

The cover plate may be divided into an inner surface portion and an outer surface portion on the same level surface as the top end surface of the wall rail.
In this case, the cover plate is reduced in volume, so that it is easy to adhere to the wall rail, and the top surface of the outer surface portion is covered with the lower surface of the inner surface portion, so that rainwater can flow along the outer surface of the outer surface portion. Can do.

The outer surface portion may have a lower end lowered downward from the lower end of the wall rail to form a draining portion.
By so doing, rainwater drops from the lower end of the draining portion, so that rainwater can be prevented from wrapping around the bottom surface of the floor slab, and corrosion of the reinforcing bars can be prevented.

The inner surface portion and the outer surface portion are connected to each other by a drop-off preventing device that crosses the lower side of the cable passing through the wall rail at a distance from the cable in the expansion gap. May be.
In this way, even if the inner surface portion or the outer surface portion is about to fall off the wall rail due to impact force, vibration, wind pressure, or the like, the drop-out can be prevented by connecting with the other party, which is safe. Further, it is possible to prevent the cable from being damaged by the drop-off prevention tool when the position is shifted due to an impact force or the like.

The drop-off prevention device is composed of a fixture and a linking tool, the fixture is attached to at least one of the inner surface portion and the outer surface portion, and the linking tool has one end on which the fixture is not attached. It may be attached to the part for use or the part for external face and the other end may be releasably engaged with the fixture.
If it carries out like this, since the attachment tool is attached to this inner surface part or this outer surface part, and the connection tool is attached to the other to which the attachment tool is not attached, handling becomes easy.

The drop-off prevention tool is composed of a fixture and a linkage, and the fixtures are attached to the inner surface portion and the outer surface portion as a pair, and the linkage is connected to both fixtures so as to be released. Also good.
If it carries out like this, since a connection tool can be removed from an attachment tool, a connection tool does not hang and become obstructive at the time of repair and replacement | exchange of the part for inner surfaces, and the part for outer surfaces.

The fixture has an engaging portion at one end, and the other end is fixed to the inner surface portion or the outer surface portion, and the connecting tool is non-returned at an end portion of the fixture that engages with the engaging portion. A hook with a nail may be provided.
If it carries out like this, a connection tool can be attached to a fixture only by engaging a hook with a check claw with an engaging part, and if both hooks are removed like usual, both engagement can be released.

  The fixture comprises a pair of countersunk bolts in a U-shape with discontinuous parts as a whole, and the inner part or the outer part is provided by a counter part at both ends and a nut facing the counter part separately. Nuts that are individually engaged with screws formed on both side portions with the discontinuous portion interposed therebetween, the connecting tool being detachable with respect to the fixture through the discontinuous portion. The discontinuous portion may be opened and closed by contact and separation.

  In this case, since the surface of the countersunk bolt does not protrude outward from the surface of the inner surface portion or the outer surface portion, there is little damage even if a vehicle or the like collides, and there is a risk of being removed by mischief. The attachment tool can be stably attached to the inner surface portion and the outer surface portion, and the connecting tool can be easily attached and detached by operating the nuts screwed to both side portions of the discontinuous portion.

  The fixture is composed of a pair of flat head bolts in a U-shape with discontinuous portions as a whole, and the discontinuous portions are closed by a counter portion at each end and a nut facing each of the flat portions. At least one of the inner surface portion and the outer surface portion may be sandwiched, and one of the countersunk bolts may be removed to remove the connecting tool.

  In this case, the discontinuous part is closed when the connecting tool is engaged with one countersunk bolt and the pair of countersunk bolts are attached to the inner surface part or the outer surface part, so it is necessary to close the discontinuous part again. No, you can easily remove it by removing the other countersunk bolt.

  The stretchable gap covering structure of the second wall rail according to the present invention is adapted to the thickness of the cover plate on at least the inner surface of the wall rail facing the gap between the stretchable gaps and allows the cover plate to move when the wall rail is expanded or contracted. A concave portion to be formed is formed. A cover plate formed so as to match the cross-sectional shape of the wall rail in the concave portion is installed on the wall rail covering the expansion / contraction gap with the concave portion. Then, the cover plate is fixed to the other wall rail, leaving a moving gap in one recess of the wall rail.

  According to the stretchable gap covering structure of the second wall rail, in addition to the action and effect of the stretchable gap covering structure of the first wall rail, the inner surface of the cover plate is flush with the inner surface of the wall rail inside the wall rail. It will be located and will not protrude inward from the inner surface of the wall rail. Accordingly, it is possible to prevent the vehicle surface from being thinly scraped off and remaining in the gap between the cover plate and the wall rail when an accident occurs in which the vehicle travels while rubbing the cover plate.

  According to the stretch wall covering structure of the first wall rail according to the present invention, the cover plate formed so as to conform to the cross-sectional shape of the wall rail across the wall of the stretch gap, Since the cover plate is fixed to one wall height column of the wall height column, the cover plate can be covered by covering the expansion gap on each of the opposite wall height columns on both sides of the expansion gap. The inner surface of each wall is in close contact with the top, outer and inner surfaces of each wall rail, enabling stable deposition, and the cover plate is free to move relative to the other wall rail, so the influence of the expansion and contraction of the wall rail Not receive.

  According to claim 2, since the cover plate is divided into an inner surface portion and an outer surface portion on the same level surface as the top end surface of the wall rail, the cover plate can be reduced in volume and can be easily attached to the wall rail. Thus, since the top surface of the outer surface portion is covered with the lower surface of the inner surface portion, rainwater can flow down along the outer surface of the outer surface portion.

  According to claim 3, since the lower portion of the outer surface portion hangs downward from the lower end of the wall rail to form a draining portion, rainwater is dripped from the lower end of the draining portion, and rainwater falls on the floor slab lower surface. It can prevent wraparound and prevent corrosion of reinforcing bars.

According to claim 4, for the inner surface portion and the outer surface for unit the lower cable of at least the outermost bottom layer of the cable passing through the inside wall railing at a distance from the cable crosses in the stretching gap Because it is connected by a drop-off prevention tool, even if the inner surface part or the outer surface part tries to drop off the wall rail due to impact force, vibration, wind pressure, etc., it can be prevented from dropping by connecting with the other party, is there. Further, it is possible to prevent the cable from being damaged by the drop-off prevention tool when the position is shifted due to an impact force or the like.

  According to claim 5, the drop-off prevention device is constituted by a fixture and a linking tool, the fixture is attached to at least one of the inner surface portion and the outer surface portion, and one end of the linking device is the fixture. Since the other end is releasably engaged with the fixture, the handle becomes easy.

  According to claim 6, the drop-off prevention tool is constituted by a fixture and a linking tool, and the fixtures are individually attached to the inner surface portion and the outer surface portion as a pair, and the linking tool includes both fixtures. Since it is connected in a freely releasable manner, the connecting tool can be removed from the mounting tool, and the connecting tool does not get in the way when it is repaired or exchanged for the inner surface portion or the outer surface portion.

  According to claim 7, the fixture has an engaging portion at one end, the other end is fixed to the inner surface portion or the outer surface portion, and the connecting device is engaged with the engaging portion of the fixture. Since the hook with the check claw is provided at the end to be joined, the connecting tool can be attached to the fixture simply by engaging the hook with the check claw with the engaging portion. The engagement can be released.

  According to claim 8, the fixture is configured in a U shape having a discontinuous portion as a whole with a pair of countersunk bolts, and for the inner surface by the countersunk portions at both ends and the nuts respectively opposed to the pans. Each of the screws formed on both sides of the discontinuous portion is detachable with respect to the fixture through the discontinuous portion. Since the discontinuous part is opened and closed by contact and separation of the nut screwed separately, the surface of the countersunk bolt does not protrude outward from the surface of the inner surface part or the outer surface part, Even if a vehicle collides, it is less likely to be damaged and less likely to be removed by mischief, and the fixture can be stably attached to the inner and outer parts, and the linking tool is attached to both sides of the discontinuous part. It can be easily detached by operating the screwed nut.

  According to claim 9, the fixture comprises a pair of countersunk bolts as a whole in a U-shape with a discontinuous part, and the discontinuity is provided by a counter part at both ends and a nut facing the counter part separately. With the part closed, at least one of the inner surface part and the outer surface part is sandwiched, and one of the countersunk bolts is removed so that the connecting tool is removed. Engage and attach a pair of countersunk bolts to the inner surface or outer surface part to close the discontinuous part, and it is not necessary to close the discontinuous part again. Can be removed.

  According to the expansion wall covering structure of the second wall rail according to the present invention of claim 10, the thickness of the cover plate is adapted to at least the inner surface of the wall wall opposite to each other across the expansion gap, and when the wall rail is expanded or contracted. A cover plate formed with a recess that allows movement of the cover plate and adapted to match the cross-sectional shape of the wall rail in the recess is installed over the wall rail covering the expansion gap with the recess. Since the cover plate is fixed to the other wall rail while leaving a moving gap in one recess of the wall rail, in addition to the action and effect of the stretchable gap covering structure of the first wall rail, the cover plate is covered inside the wall rail. The inner surface of the plate is positioned on the same plane as the inner surface of the wall rail, so that it does not protrude inward from the inner surface of the wall rail. Accordingly, it is possible to prevent the vehicle surface from being thinly scraped off and remaining in the gap between the cover plate and the wall rail when an accident occurs in which the vehicle travels while rubbing the cover plate.

  FIG. 1 is a partially cut slant view showing a specific example of a stretchable gap covering structure of a first wall rail according to the present invention, and FIG. 2 is a view showing a section B of FIG. 1 is a cross-sectional view taken along line AA of FIG. 1, and FIG. 3 is a partially cut slant view showing a specific example of the stretchable gap covering structure of the second wall rail. Throughout the drawings, the same reference numerals denote the same or corresponding parts.

  Reference numerals 1 and 2 are bridge slabs, which are provided relative to each other with an expansion gap 3 in the direction of the bridge axis, and pavement layers 4 and 5 are provided on the respective surfaces. An expansion joint 6 is installed in the expansion gap 3 as usual. Reference numerals 7 and 8 denote wall height columns that stand from the side edges of the floor slabs 1 and 2, respectively, and an expansion / contraction gap 9 is provided corresponding to the expansion / contraction gap 3 between the floor slabs 1 and 2. A cover plate 10 is made of metal, plastic, or the like, and is formed to match the cross-sectional shape of the wall height columns 7 and 8. The cover plate 10 is installed on the wall height columns 7 and 8 so as to cover the expansion / contraction gap 9, and is fixed to one of the wall height columns 7 and 8, which is 7 in the illustrated example.

  The inner surface of the cover plate 10 is in close contact with the top end surfaces 11 and 12, the outer surfaces 13 and 14, and the inner surfaces 15 and 16 of the respective wall height columns 7 and 8, thereby enabling stable deposition. This cover plate 10 is relatively movable with respect to the other wall height column 8 and is not affected by the relative expansion and contraction of the wall height columns 7 and 8.

The cover plate 10 is divided into an inner surface portion 17 and an outer surface portion 18 on the same level surface as the top end surface 11 or 12 of the wall height column 7 or 8.
In this case, since the bulk of the cover plate 10 is reduced, it is easy to adhere to the wall rails 7 and 8, and the top surface 19 of the outer surface portion 18 is covered with the lower surface 20 of the inner surface portion 17, so that rainwater is used for the outer surface. It can flow down along the outer surface of the part 18.

A lower end of the outer surface portion 18 hangs downward from lower ends of the wall height columns 7 and 8 to form a draining portion 21.
In this case, since rainwater is dripped from the lower end of the draining part 21, it can prevent that rainwater wraps around the lower surface of the floor slabs 1 and 2, and corrosion of a reinforcing bar etc. can be prevented.

The inner surface portion 17 and the outer surface portion 18 are provided with a drop-off prevention device that crosses at least a lower side of the lowermost cable 22a of the cable 22 passing through the wall rails 7 and 8 within the expansion gap 9 at a distance from the cable 22a. 23 are connected.
In this case, even if the inner surface portion 17 or the outer surface portion 18 tries to drop off from the wall column 7 or 8 due to impact force, vibration, wind pressure, or the like, the drop-off can be prevented by connecting with the other party, which is safe. Further, it is possible to prevent the cables 22 and 22a from being damaged by the dropout prevention tool 23 when the position is shifted due to an impact force or the like.

The drop-off prevention tool 23 is composed of a fixture 24 and a connecting tool 25, and this fixture 24 is attached to at least one of the inner surface portion 17 and the outer surface portion 18, and one end of the connecting device 25 is attached to the fixture 24. It is attached to the inner surface portion 17 or the outer surface portion 18 that is not, and the other end is releasably engaged with the fixture 24.
In this case, the fixture 24 is attached to the inner surface portion 17 or the outer surface portion 18, and the connecting tool 25 is attached to the other side to which the fixture 24 is not attached, so that the handling becomes easy.

The drop-off prevention device 23 is composed of a fixture 24 and a connecting device 25, and the attachment tools 24 are individually attached to the inner surface portion 17 and the outer surface portion 18, and the connecting device 25 allows the two attachment tools 24 to be released. It is connected.
In this case, since the linking tool 25 can be removed from the mounting tool 24, the linking tool 25 does not hang when the inner surface portion 17 or the outer surface portion 18 is repaired or replaced.

The fixture 24 has an engaging portion 26 at one end, the other end is fixed to the inner surface portion 17 or the outer surface portion 18, and the connecting device 25 is opposite to the end portion that engages with the engaging portion 26 of the fixture 24. A hook 27 with a pawl is provided.
In this case, the connecting device 25 can be attached to the mounting device 24 simply by engaging the hook 27 with the engaging portion 26, and the hook 27 can be disengaged by removing the check pawl of the hook 27 as usual.

  The fixture 24 is composed of a pair of countersunk bolts 28 and 29 in a U-shape having a discontinuous part 30 as a whole, and counters the counters 31 and 32 at both ends and the counters 31 and 32 respectively. The inner surface portion 17 or the outer surface portion 18 is sandwiched by the nuts 33 and 34, and the connecting device 25 can be engaged with and disengaged from the mounting tool 24 through the discontinuous portion 30, and the discontinuous portion 30 is sandwiched therebetween. The discontinuous portion 30 is opened and closed by contact and separation of nuts 37 and 38 screwed into screws 35 and 36 formed on both side portions.

  In this case, since the surface of the countersunk bolts 28 and 29 does not protrude outward from the surface of the inner surface portion 17 or the outer surface portion 18, it is less likely to be damaged even if a vehicle or the like collides, and is removed by mischief. The attachment 24 is stably attached to the inner surface portion 17 and the outer surface portion 18, and the connecting device 25 is easily operated by operating the nuts 37 and 38 that are screwed to both side portions of the discontinuous portion 30. Detachable.

  The fixture 24 is configured by a pair of countersunk bolts 28 and 29 having a U-shape with a discontinuous part 30 as a whole, and counters the counters 31 and 32 at both ends and the counters 31 and 32 and nuts 33 respectively facing each other. And 34, at least one of the inner surface portion 17 and the outer surface portion 18 is sandwiched with the discontinuous portion 30 closed, and the connecting plate 25 is removed by removing the other flat bolt 29. Yes. Therefore, the other countersunk bolt 29 having a length that allows the discontinuous part 30 to be closed if the countersunk part 31 is installed in advance is used with respect to one countersunk bolt 28, and the nut 34 is used when the counters 31 are attached or detached. The bolt 29 is sufficiently fixed to the cover plate 10 so as not to rotate.

  In this case, the discontinuous part 30 is closed when the connecting tool 25 is engaged with one countersunk bolt 28 and the pair of countersunk bolts 28 and 29 are attached to the inner surface part 17 and the outer surface part 18. The discontinuous portion 30 does not need to be closed again and can be easily removed by removing the other countersunk bolt 29.

  The stretchable gap covering structure of the second wall rail according to the present invention is adapted to the thickness of the cover plate 10 on at least the inner surfaces 15 and 16 of the wall height columns 7 and 8 facing each other across the stretchable gap 9 and the wall height columns 7 and 8. Concave portions 39 and 40 that allow the movement of the cover plate 10 during expansion and contraction are formed. The cover plate 10 formed so as to conform to the cross-sectional shape of the recesses 39 and 40 of the wall height columns 7 and 8 is installed on the wall height columns 7 and 8 so as to cover the expansion / contraction gap 9 with the recesses 39 and 40. Then, the cover plate 10 is fixed to the other wall height column 7 by a fixture 41 such as a countersunk bolt, leaving a moving gap in one of the wall height columns 7 and 8, in the illustrated example, the recess 40.

  According to the stretchable gap covering structure of the second wall rail, in addition to the action and effect of the stretchable gap covering structure of the first wall rail, the surface of the cover plate 10 is placed on the wall height rails 7 and 8 inside the wall height columns 7 and 8. The surface of the vehicle is located in the same plane as the inner surfaces 15 and 16 of the vehicle and does not protrude inward, does not obstruct traffic, and if the vehicle runs while rubbing the cover plate, Thinly scraped off and can be prevented from remaining in the gap between the cover plate and the wall rail.

It is a partially cut slant view which shows the specific example of the expansion gap covering structure of the 1st wall rail concerning this invention. 1 is a cross-sectional view taken along the line AA in FIG. It is a modification of FIG. It is a partially cut slope view which shows the specific example of the expansion-contraction gap covering structure of the 2nd wall rail concerning this invention.

Explanation of symbols

7, 8 Wall height column 9 Stretching gap 10 Cover plate 12 Top end surface 17 Inner surface portion 18 Outer surface portion 22 Cable 23 Drop-off prevention tool 24 Mounting tool
25 Linkage 26 Engagement part 27 Hook 28, 29 Countersunk bolt 30 Discontinuous part 31, 32 Countersunk part 33, 34 Nut 35, 36 Screw 37, 38 Nut 39, 40 Recess

Claims (10)

  A cover plate (10) formed to fit the cross-sectional shape of the wall height column (7, 8) on the wall height column (7, 8) opposed across the expansion gap (9), the expansion gap (9) A cover for the wall rails, wherein the cover plate (10) is fixed to one wall rail of the wall rails (7, 8).   The wall according to claim 1, wherein the cover plate (10) is divided into an inner surface portion (17) and an outer surface portion (18) at the same level as the top end surface (12) of the wall rail (7, 8). High rail expansion and contraction gap covering structure.   3. The wall rail column stretchable gap covering structure according to claim 2, wherein the outer surface portion (18) has a lower end hanging downward from a lower end of the wall column (7, 8) to form a draining portion (21). The inner surface portion (17) and the outer surface portion (18) are arranged such that the lower side of the lowermost cable (22a) of the cable (22) passing through the wall rail (7, 8) is separated from the cable. 4. A wall railing expansion / contraction gap covering structure according to claim 2 or 3 connected by a drop-off prevention device (23) crossing within the expansion / contraction gap (9).   The drop prevention tool (23) is composed of a fixture (24) and a coupling tool (25), and the fixture (24) is attached to at least one of the inner surface portion (17) and the outer surface portion (18). The connecting device (25) is attached to the inner surface portion (17) or the outer surface portion (18) where one end is not attached to the attaching device (24) and the other end is attached to the attaching device (24). 5. A wall railing expansion / contraction gap covering structure according to claim 4, which is releasably engaged.   The drop prevention tool (23) is composed of a fixture (24) and a coupling tool (25), and the fixture (24) is divided into a pair of the inner surface portion (17) and the outer surface portion (18). 5. A wall railing expansion / contraction gap covering structure according to claim 4, wherein the attachment (25) is connected to both attachments (24), and at least one of the attachments (24) is connected in a releasable manner.   The fixture (24) has an engaging portion (26) at one end, and the other end is fixed to the inner surface portion (17) or the outer surface portion (18), and the connecting tool (25) 7. A wall railing expansion / contraction gap covering structure according to claim 5 or 6, wherein a hook (27) with a check claw is provided at an end of the tool (24) engaged with the engagement portion (26).   The fixture (24) is composed of a pair of countersunk bolts (28, 29) in a U-shape with discontinuous parts (30) as a whole, the countersunk parts (31, 32) at both ends, and the countersunk parts At least one of the inner surface portion (17) and the outer surface portion (18) is sandwiched by nuts (33, 34) respectively opposed to (31, 32), and the connecting tool (25) is The discontinuous portion (30) is detachable with respect to the fixture (24), and the discontinuous portion (30) is a screw (35, 35) formed on both sides of the discontinuous portion (30). The wall covering of the wall rail according to claim 5, 6 or 7, wherein the discontinuous portion (30) is opened and closed by contact and separation of nuts (37, 38) screwed individually to 36). Construction.   The fixture (24) is composed of a pair of countersunk bolts (28, 29) in a U-shape with discontinuous parts (30) as a whole, the countersunk parts (31, 32) at both ends, and the countersunk parts At least one of the inner surface portion (17) and the outer surface portion (18) is sandwiched with the discontinuous portion (30) closed by the nuts (33, 34) opposed to the (31, 32). The stretchable gap covering structure for a wall rail according to claim 5, 6 or 7, wherein the connecting bolt (25) is removed by removing one countersunk bolt (29).   A cover adapted to the thickness of the cover plate (10) on at least the inner surface (15, 16) of the wall height column (7, 8) opposed across the expansion gap (9) and when the wall height column (7, 8) is expanded or contracted A cover plate (10, 40) formed so as to conform to the cross-sectional shape of the recess (39, 40) of the wall rail (7, 8) is formed by forming a recess (39, 40) that allows movement of the plate (10). ) Is constructed over the wall rail (7, 8) so as to cover the expansion gap (9) with the recess (39, 40), and the cover plate (10) is placed on one side of the wall rail (7, 8). A wall rail column extending and contracting gap covering structure, characterized in that a moving gap is left in the recess of the wall column and fixed to the other wall column.

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