JP2013144894A - Water stop material for expansion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water stop material for an expansion device, which allows a resin foam to be uniformly deformed as much as possible in accordance with the expansion and contraction of the expansion device, and further can maintain the whole top face thereof in a flat shape.SOLUTION: A body 10 of the water stop material comprises the resin foam having open cells. A water stop film 12 is embedded in the body 10 of the water stop material. The water stop film 12 is formed into such a wave shape as to go and return in a vertical direction toward a direction along an expansion and contraction direction of an expansion device 1. A water stop material 5 is arranged in an expansion gap 4 of a web in the expansion device 1. The waved water stop film 12 is expanded and contracted in bellows form with respect to the expansion and contraction of the expansion device 1.

Description

  The present invention relates to a waterproofing material for an expansion / contraction device disposed, for example, between webs of an expansion / contraction device for a steel road bridge.

  In general, an end of a steel road bridge is provided with an expansion / contraction device for absorbing expansion / contraction of a steel girder due to temperature change, and rainwater flowing on the bridge road surface passes between the web play of the expansion / contraction device. In order to prevent the water from falling down, a water stop material is arranged.

  The waterstop material is an elastic body that can follow the expansion and contraction of the expansion and contraction device. In particular, by using a resin foam having open cells, the waterstop material can be stretched and stretched and compressed and stretched. The change in length can be suppressed, and the present invention can be employed in an expansion / contraction apparatus having a large expansion / contraction amount. However, since the resin foam having open cells may leak rainwater through the open cells, for example, not only the resin foam but also a water stop film such as a rubber sheet on the horizontal is used as the water stop material. A structure in which water is provided to stop water is adopted (for example, Patent Document 1).

JP2011-1722 (paragraph numbers 0021 to 0023)

  However, the water-stopping material having a structure in which the water-stopping film is provided horizontally as in Patent Document 1 does not have sufficient stretchability of the water-stopping film even if the resin foam has sufficient stretchability. Therefore, non-uniform wrinkles are likely to be formed in the waterstop film by being compressed along with the expansion and contraction of the expansion / contraction device. This non-uniformity of the water-stopping film causes the resin foam to deform non-uniformly, and also forms a non-uniform recess on the top surface of the water-stopping material, causing stagnation and the like to stay, resulting in early deterioration of the water-stopping material. There is a risk of causing.

  The present invention provides a waterproofing material for an expansion / contraction device that can make the deformation of the resin foam accompanying expansion / contraction of the expansion / contraction device as uniform as possible, and can keep the upper surface of the waterproofing material flat as a whole. Objective.

  In order to achieve the above object, the waterproofing material for an expansion / contraction device according to the present invention is disposed and used between the webs of the expansion / contraction device, and the waterproofing material main body made of a resin foam having open cells, The water stop film is embedded in the water stop material main body, and the water stop film is formed into a waveform that reciprocates in the vertical direction toward the direction along the expansion / contraction direction of the expansion / contraction device.

  According to the above configuration, since the water-stopping material main body is constituted by the resin foam having open cells, the stretchability of the water-stopping material can be increased, and the thickness change due to compression and extension can be suppressed. Since the water stop film is embedded in the material main body, it is possible to prevent rainwater and the like from leaking through the open bubbles of the water stop material main body.

  Furthermore, since the water-stopping film embedded in the water-stopping material body is formed into a corrugated shape, the corrugated water-stopping film can be expanded and contracted in an accordion-like manner to the expansion and contraction of the expansion and contraction device, and the waterstop film is forcibly compressed It is possible to prevent the occurrence of uneven wrinkles. Thereby, even if the expansion / contraction amount of the expansion / contraction device is large, the deformation of the resin foam accompanying the expansion / contraction of the expansion / contraction device can be made uniform as much as possible, and the top surface of the waterstop material can be kept flat as a whole.

  You may make it stick a 2nd water stop film on the side surface which opposes the web surface of the expansion-contraction apparatus among the water stop material main bodies.

  According to this configuration, since the second water-stop film is adhered to the side surface of the water-stop material body, rainwater or the like accumulated on the corrugated water-stop film leaks from the side surface of the water-stop material body and stops. It can prevent falling down through the gap between the water material and the web surface.

  The corrugated water stop film protrudes from the side surface of the water stop material body, and is formed to have a length that extends to the web surface of the extension device of the water stop material receiving bracket that receives the water stop material body. Also good.

  According to this configuration, since the corrugated water stop film protrudes from the side surface, rainwater or the like accumulated on the upper side of the corrugated water stop film is formed between the tip of the corrugated water stop film and the web surface or the second water stop film. Leakage from the gap can be prevented. In addition, since the protruding water-stopping film is extended to the mounting part of the water-stopping material catch, the water-stopping film is securely attached to the web surface using the force to attach the water-stopping material catch. be able to.

  Furthermore, the corrugated water-stopping film is projected from the side surface of the water-stopping material main body, and is formed to have a length that extends to the web surface of the expansion device of the water-stopping material receiving bracket that receives the water-stopping material main body. In addition to the above, the second water blocking film is formed to have a length extending from the side surface of the water blocking material main body to the mounting portion of the water blocking material receiving bracket, and the side surface of the water blocking material main body of the corrugated water blocking film The second water-stopping film may be pressure-bonded to the web surface by sticking to a portion protruding from the base and bolting the water-stopping material catch to the web surface of the expansion / contraction device.

  According to this configuration, since the second water-stopping film adhered to the protruding portion of the water-stopping film is pressure-bonded to the web surface, rainwater or the like falls downward through the gap between the water-stopping material and the web surface. Can be prevented. In addition, the water-stopping material receiving metal fitting is bolted to the web surface, and the second water-stopping film stuck on the water-stopping film is pressure-bonded to the web surface, so that the unevenness of the web surface can be absorbed, The second water-stop film can be surely adhered to the web surface to stop the water.

  Further, the present invention includes a water-stop material body made of a resin foam, and a corrugated reinforcement sheet that reciprocates in the vertical direction toward the direction along the expansion / contraction direction of the expansion / contraction device is embedded in the water-stop material main body. A waterproofing material for an expansion device is provided.

  According to this configuration, since the corrugated reinforcing sheet is embedded in the waterstop body, the corrugated reinforcing sheet can be expanded and contracted in an accordion shape with respect to the expansion and contraction of the expansion and contraction device. The water-stopping material body can be expanded and contracted uniformly. Thereby, even if the expansion / contraction amount of the expansion / contraction device is large, the deformation of the resin foam accompanying the expansion / contraction of the expansion / contraction device can be made uniform as much as possible, and the top surface of the waterstop material can be kept flat as a whole.

  In addition, although the water-stopping material main body may be a resin foam having open cells as described above, it may be a resin foam having closed cells. Further, the reinforcing sheet may be a water-stopping film as described above, but may be a sheet having no water-stopping performance.

  Moreover, this invention provides the expansion / contraction apparatus provided with said water stop material for expansion / contraction apparatuses. According to this structure, there can exist the same effect as the effect by employ | adopting the structure of said water stop material for expansion-contraction apparatuses.

  As described above, according to the present invention, since the corrugated water-stopping film and the reinforcing sheet are embedded in the water-stopping material main body made of the resin foam, the water-stopping film and the reinforcing sheet are formed in a bellows shape along with the expansion and contraction of the expansion / contraction device. It is possible to prevent the formation of uneven wrinkles on the waterstop film or the reinforcing sheet. As a result, deformation of the resin foam accompanying expansion and contraction of the expansion and contraction device can be made uniform as much as possible, and the top surface of the water-stopping material can be kept flat as a whole to prevent stagnation of earth and sand and suppress deterioration of the water-stopping material. As a result, the service life can be extended.

Sectional drawing of the expansion-contraction apparatus which provided the water stop material for the expansion-contraction apparatus which concerns on this invention The figure which shows the state before tightening a mounting bolt with the principal part expanded sectional view of a telescopic device. It is a perspective view of a water stop material, (a) shows a free state, (b) shows the state compressed in the expansion-contraction direction.

  EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the water stop material for expansion-contraction apparatuses which concerns on this invention is demonstrated using drawing.

  As shown in FIGS. 1 and 2, the expansion / contraction device 1 is provided, for example, at the end of a steel road bridge to absorb expansion / contraction of a steel girder due to a temperature change, and the web stop 4 has a waterproofing material for the expansion / contraction device. 5 is a non-drainage type steel expansion / contraction device arranged to prevent rainwater or the like flowing on the bridge road surface from falling from the web gap 4, and a pair that opposes each other in the expansion / contraction direction across the web gap 4. The web plate 7 and a pair of comb-shaped face plates 8 meshing with each other are formed into a cross beam shape and attached to the end of the steel beam.

  As shown in FIGS. 1 to 3, the water-stop material 5 includes a water-stop material body 10 made of a resin foam having open cells, a dust-proof protective foam 11 provided on the upper surface side of the water-stop material body 10, and The water-stopping film 12 that is embedded in the water-stopping material main body 10 and forms a waveform that reciprocates in the vertical direction toward the direction along the expansion / contraction direction of the expansion / contraction device 1, and the web plate 7 of the water-stopping material main body 10 face each other. And a second water-stop film 13 attached to the side surface. The water-stopping material 5 is disposed between the water-stopping material receiving metal fitting 14 that is bolted to the web plate 7 and the face plate 8, and its side surface is bonded to the web surface of the web plate 7.

  The water-stop material body 10 is formed into a thick plate shape having a rectangular cross section made of, for example, an ether-based urethane having open cells, and suppresses a change in thickness due to expansion and contraction, and a large amount of expansion and contraction is set. The water blocking material main body 10 is separated and cut into upper and lower layers 10a and 10b by a cut surface that forms a waveform of the water blocking film 12 at the center in the thickness direction, and the upper and lower layers 10a and 10b are stopped between the cut surfaces. Bonded with a water film 12 interposed. As a result, a corrugated water stop film 12 is embedded in the thickness direction center of the water stop material body 10 to prevent water leakage through the open bubbles of the water stop material body 10.

  The dust-proof protective foam 11 is made of, for example, an EPDM (ethylene propylene rubber) foam having excellent weather resistance, durability, and fire resistance. The dust-proof protective foam 11 is bonded to the upper surface side of the water-stopping material main body 10, and from the comb-shaped gap of the face plate 8. The waterproofing material main body 10 is protected from damage caused by sedimentation of invading earth and sand, fire of cigarettes, and the like.

  The water-stop film 12 is made of, for example, a 0.35 mm chloroprene rubber-drawn cloth excellent in weather resistance and durability, and both surfaces thereof are bonded to the upper and lower layers 10a and 10b of the water-stop material body 10 and in the stretching direction. Both end portions protrude from the side surface of the water blocking material main body 10 to prevent rainwater and the like from leaking around the tip end portion of the water blocking film 12. The protruding portion of the water blocking film 12 is folded downward and bonded to the side surface of the lower layer 10b of the water blocking material main body 10 and extends to the attachment portion 15 of the water blocking material receiving metal fitting 14 to the web plate 7. It is formed to protrude downward from the lower layer 10b.

  The second water-stop film 13 is made of, for example, a 5 mm chloroprene rubber sponge excellent in weather resistance and durability, and includes the upper layer 10a of the water-stop material body 10 and the side surfaces at both ends of the dust-proof protective foam 11 in the expansion / contraction direction. It adhere | attaches so that the site | part which protrudes from the water stop material main body 10 of the water film 12 may be covered. The surface of the second water blocking film 13 is bonded to the web surface of the web plate 7 and prevents rainwater or the like accumulated on the upper side of the water blocking film 12 from leaking from the side surface of the water blocking material body 10.

  The water stop film 12 and the second water stop film 13 are pressure-bonded to the mounting portion 15 of the water stop material receiving metal fitting 14 and the web surface by bolting the water stop material receiving metal fitting 14 to the web surface of the web plate 7. It absorbs irregularities on the web surface and stops water more reliably.

  The web plate 7 is formed by standing a steel plate having a height direction dimension similar to the thickness of a concrete floor slab of a steel road bridge, for example, and a face plate 8 made of a thick steel plate is welded to the upper end of the steel plate by, for example, welding. The road surface and the height are provided substantially horizontally. A concrete floor slab is placed on the back side of the transverse beam-shaped expansion and contraction device 1 having the web plate 7 and the face plate 8 and pavement is applied.

  The face plate 8 is a well-known finger type in which a portion protruding into the web clearance 4 is formed in a comb shape, and the comb shape meshes with each other so that the vehicle can run and extend.

  The water stop material receiving metal fitting 14 is made of a steel plate, and a portion that protrudes substantially horizontally to the web clearance 4 and receives the water stop material 5 has a comb-like structure similar to the face plate 8, for example, and the base end portion is inclined downward. It is bent and fixed to the mounting portion 15 that is bolted to the web plate 7 by welding. A U-shaped groove 19 is attached to the inner end portion of the attachment portion 15, and even if the water stoppage material 5 is damaged and rainwater leaks out, the rainwater etc. is prevented from falling in response to it. ing.

  Next, a procedure for installing the waterstop material 5 for the expansion device will be described. First, after cleansing and cleaning the web surface of the web plate 7 of the expansion and contraction device 1, an adhesive is applied to the web surface and the second water blocking film 13. Next, the water blocking material 5 is compressed to, for example, 10 mm or more in the expansion / contraction direction and disposed on the web clearance 4 and the lower surface side of the face plate 8, and the second water blocking film 13 is bonded to the web surface.

  Further, the water stop material receiving metal fitting 14 and the attachment portion 15 of the U-shaped groove 19 are bolted to the web surface of the web plate 7. As a result, the water-stopping material 5 is held between the face plate 8 and the water-stopping material catch 14 and set in the web clearance 4 in a compressed state, and the water-stopping film 12 and the second water-stopping film 13 are stopped. A completely water-stop structure is formed by pressure bonding to the attachment portion 15 of the water material receiving metal fitting 14 and the web surface.

  According to the above configuration, the water-stopping material body 10 is formed of a resin foam having open cells such as ether urethane, so that the water-stopping material body 10 is softened and the thickness change accompanying expansion and contraction of the expansion / contraction device 1 is reduced. The amount of expansion / contraction can be set large. Moreover, the water-stopping material 5 can be made light and easy to handle, and the workability thereof can be improved, such as being able to be folded or rolled up and transported.

  Moreover, since the water stop film | membrane 12 is embed | buried under the water stop material main body 10, the water leak through the open cell of the water stop material main body 10 can be prevented. Moreover, as shown in FIG. 3, since the water blocking film 12 is formed in a waveform, the water blocking film 12 is expanded and contracted in a bellows shape, and the water blocking material body 10 is expanded and contracted uniformly. The upper surface of the dustproof protective foam 11 can be maintained flat as a whole.

  As the water-stopping film 12, for example, a chloroprene rubberized cloth of 0.35 mm has flexibility and strength that can withstand a 100,000-time refractive endurance test. The expansion and contraction device 1 can follow the expansion and contraction without causing damage to the water blocking film 12, and the water stoppage can be maintained for a long period of time.

  Here, the expansion / contraction follow-up durability test performed on the water stop material 5 will be described. First, the water stop material 5 having a width of 1050 mm and a length of 1000 mm was placed between the upper and lower comb-shaped plates of the expansion / contraction durability test apparatus, and repeated displacement in the expansion / contraction direction was applied thereto. The amount of expansion / contraction was 540 mm corresponding to 50% of the length of the water-stopping material 5, and the number of expansion / contraction was 8000 times. As a result of the test, no damage such as adhesion peeling or material breakage occurred, and no significant damage such as wear of the waterstop material body 10 and the waterstop films 12 and 13 occurred.

  In addition, this invention is not limited to said embodiment, A change can be suitably added within the scope of the present invention. For example, instead of configuring the water-stopping material body 10 from a resin foam having open cells, it is configured from a resin foam having closed cells and embedding the corrugated water-stopping film 12 in the water-stopping material body 10. Further, a reinforcing sheet having no water stop may be formed in a corrugated shape and embedded. In this case, since the resin foam having closed cells has a water-stopping property, it is possible to prevent water leakage even if the reinforcing sheet has no water-stopping property. The expansion and contraction of the material body 10 can be made uniform, and the top surface of the water stop material body 10 can be maintained in a flat state as a whole.

DESCRIPTION OF SYMBOLS 1 Expansion / contraction apparatus 4 Web clearance 5 Water stop material 7 Web plate 8 Face plate 10 Water stop material main body 10a Upper layer 10b Lower layer 11 Dust-proof protection foam 12 Water stop film 13 Second water stop film 14 Water stop material receiving metal fitting 15 Attachment part 19 U-shaped groove

Claims (6)

  A waterproofing material for a stretching device disposed between webs of the stretching device, comprising a waterproofing material body made of a resin foam having open cells, and a waterproofing film embedded in the waterproofing material body, The waterproofing material for an expansion / contraction device, wherein the waterproofing film is formed in a waveform that reciprocates in a vertical direction toward a direction along the expansion / contraction direction of the expansion / contraction device.   The water-stopping material for an expansion / contraction device according to claim 1, wherein a second water-stopping film is attached to a side surface of the water-stopping material main body that faces the web surface of the expansion / contraction device.   The corrugated water stop film protrudes from the side surface of the water stop material body and is formed to have a length that extends to the attachment portion of the water stop material receiving metal fitting that receives the water stop material body to the web surface of the expansion device. The waterstop material for a telescopic device according to claim 1 or 2, wherein the waterstop material is used.   The corrugated water stop film protrudes from the side surface of the water stop material body and is formed to have a length that extends to the attachment portion of the water stop material receiving metal fitting that receives the water stop material body to the web surface of the expansion device. The second water-stop film is formed to have a length extending from a side surface of the water-stop material body to a mounting portion of the water-stop material receiving bracket, and the water-stop material body of the corrugated water-stop film The second water-stopping film is pressure-bonded to the web surface by being fastened to a portion protruding from the side surface of the water-tightening member and bolting the water-stopping material catch to the web surface of the expansion device. The waterstop material for expansion and contraction devices according to 2.   A telescopic device comprising a water-stop material body made of a resin foam, and having a corrugated reinforcing sheet that reciprocates vertically in a direction along the stretch direction of the telescopic device embedded in the water-stop material body Water stop material.   An expansion / contraction apparatus comprising the water stop material for the expansion / contraction apparatus according to claim 1.

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