JP4866271B2 - Drainage forming mold and joint material - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a drainage groove forming mold and joint material used for forming a drainage groove when finishing waterproof protective concrete on the roof of a building.

  When finishing the waterproof protective concrete on the roof of the building, when forming the drainage groove, between the two groove wall panels formed of plywood etc. that form both groove walls of the drainage groove and the two groove wall panels A formwork is used, which is composed of a support panel formed of a plywood or the like that is interposed and supports two plywood panels for groove walls from the inside of the groove.

  In the construction of this formwork, two groove wall panels are placed facing each other with a support panel between them on a waterproof layer laminated on the roof slab, and fixed with mortar or the like. And build. After this, on the waterproof layer on which the waterproof protective concrete is placed, the expansion joints for absorbing the expansion and contraction of the waterproof protective concrete by separating the predetermined distance from the two groove wall panels on the outside of the two groove wall panels (Border joints) are placed, and heat insulating materials are placed as appropriate, and concrete is placed.

When the concrete is solidified, the formwork is dismantled, the support panel and the groove wall panel are removed, and the mortar block that has secured the support panel and the groove wall panel remaining in the groove is removed, and the inside of the groove is cleaned. At the same time, finish and repair the groove wall surface of the formed groove. A joint that absorbs the expansion and contraction of the mortar is placed at the bottom of the groove, and the groove bottom is finished with a mortar according to the water gradient. In this manner, a drainage groove is formed on the rooftop finished with waterproof protective concrete (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 10-317610

  As mentioned above, in the case of forming a drainage ditch when performing waterproofing protection concrete finishing on the roof of a building as has been done in the past, after casting the concrete, dismantle the formwork consisting of the groove wall panel and the support panel There is a cumbersome work process such as removing the mortar lump remaining in the groove and cleaning the inside of the groove, and if the formwork is formed of a synthetic resin plate, Leaving a problem. In addition, the bottom of the drainage ditch after the formwork removal is finished with a mortar according to the water gradient, but the waterproof protective concrete finish and the mortar finish of the drainage ditch bottom are done in separate processes, so the work is troublesome There is. Further, in order to form the drainage groove, there is a problem that it becomes complicated because a large number of contractors such as a mold carpenter, a plasterer, and a special sealer are involved.

  The purpose of the present invention is to form a drainage ditch for forming a drainage ditch when finishing a waterproof protective concrete on the roof of a building. The purpose is to provide joint joint material.

  In order to achieve the above object, the invention according to claim 1 is a drainage groove forming mold and joint material used for forming a drainage groove when waterproofing concrete finish on the roof of a building. A grooved wall member having a height corresponding to the waterproofing concrete placing surface, wherein a cap part made of a hard material having elasticity is attached to the plate-like part made of an elastic material from the upper end side And a plurality of leveling members formed by an elastic material interposed between opposing groove wall members, having a horizontally long dimension corresponding to the groove width of the drainage groove and a vertically long dimension corresponding to the water gradient of the groove bottom It is characterized by the following.

  According to the drainage groove forming formwork and joint material according to claim 1, when forming the drainage groove when finishing the waterproof protective concrete on the roof of the building, on the waterproof layer laminated on the roof slab, A drainage groove forming mold can be constructed by arranging the leveling member and the groove wall member facing each other and fixing the leveling member and the groove wall member to the waterproof layer with an adhesive or the like.

  And since the leveling member and the groove wall member that construct the drainage groove forming form are both made of an elastic material, it becomes a joint that absorbs the expansion and contraction of the concrete, and after placing the concrete for waterproof protection It is not necessary to remove the leveling member and the groove wall member for constructing the drainage groove forming formwork, and at the same time as placing the concrete for waterproofing protection, the concrete is also placed in the drainage groove forming formwork to form the groove bottom. Finish and drainage can be formed.

  In this way, it is possible to reduce the drain groove forming process when finishing the waterproof protective concrete on the roof of the building, facilitating the drain groove forming operation, and the waste material treatment after dismantling of the conventional formwork There is no problem. In addition, there is no need to separately place joint materials to absorb the expansion / shrinkage of the waterproof protective concrete around the drainage groove, which was conventionally done as a separate work from the drainage groove molding. Since there are few contractors involved, waterproofing concrete finishing work on the roof of the building can be easily performed.

  Furthermore, since the groove bottom of the drainage groove can be finished with concrete, a durable drainage groove can be obtained as compared with the drainage groove where the conventional groove bottom is finished with mortar.

  Hereinafter, the best mode for carrying out the drain groove forming mold and joint material according to the present invention will be described. FIG. 1 is a front view showing an example of an embodiment of a drain groove forming mold and joint material according to the present invention, FIG. 2 is a perspective view showing a groove wall member of this example, and FIG. 3 is a perspective view showing a leveling member of this example. FIG. 4 and FIG. 4 are side views showing a plurality of leveling members formed at a height corresponding to the water gradient.

  The drainage groove forming mold and joint material 1 of this example is composed of a groove wall member 2 that forms the groove wall of the drainage groove and a leveling member 3 for finishing the groove bottom of the drainage groove to a predetermined water gradient. Yes.

  The groove wall member 2 is composed of a plate-like portion 4 made of an elastic material and a cap portion 5 made of a hard material having elasticity from the upper end side. As the elastic material for forming the plate-like portion 4, a foam of synthetic resin such as foamed polyethylene or polystyrene is used, but is not limited thereto. Moreover, as a hard material provided with the elasticity which forms the cap part 5, a polypropylene, a synthetic rubber, etc. are used, However, It is not restricted to this.

  The plate-like portion 4 has a pedestal portion 6 for stably fixing the plate-like portion 4 to a waterproof layer described later at the lower part. In this example, the plate-like portion 4 and the pedestal portion 6 are separated from each other, and the pedestal portion 6 is formed of an elastic material such as a synthetic resin foam such as polystyrene foam. And the fitting groove 7 is formed in the upper surface of the base part 6, and the lower end of the plate-shaped part 4 is mounted | worn in this fitting groove 7. FIG.

  The cap portion 5 has a substantially U-shaped cross section, and the opening side end portions of the side plates 5a and 5b are formed to have a length embedded in the concrete to be placed, which will be described later. Anchors 8 and 9 that are integrated with the concrete project from the portions of the side plates 5a and 5b that are buried in the concrete. In particular, the anchor 9 protruding from the side plate 5b of the cap part 5 that is located outside the drainage groove is made of butyl rubber (not shown) that bonds the side plate 5b of the cap part 5 and the placed concrete. It also serves as a holding stand for holding.

  The leveling member 3 is interposed between the opposing groove wall members 2 and has a horizontally long dimension corresponding to the groove width of the drainage groove to be formed and a vertically long dimension corresponding to the water gradient of the groove bottom. It consists of a plurality of items (see FIG. 4). In the present example, a leveling member 3 used as a leveler at the bottom of the groove having a central portion in the lengthwise direction of the drainage groove is shown.

  The leveling member 3 is formed of an elastic material such as a foam of a synthetic resin such as foamed polyethylene or styrofoam, like the plate-like portion 4.

  Next, the case where the drainage groove is formed when the drainage groove forming mold and joint material 1 configured as described above is used to perform waterproofing protection concrete finishing on the roof of the building will be described.

  First, in the waterproof layer 11 laminated on the roof slab 10, the position where the groove wall member 2 for forming the drainage groove is opposed and fixed according to the groove width is marked, and the groove wall is marked at the marked position. The member 2 is arrange | positioned and it fixes to the waterproof layer 11 with an adhesive agent. A leveling member 3 having a vertically long dimension corresponding to the water gradient L at the groove bottom is interposed between the fixed opposing groove wall members 2 at a predetermined interval along the water gradient L at the groove bottom. It is mounted and fixed to the waterproof layer 11 with an adhesive, and the drainage groove mold 12 is constructed on the waterproof layer 11 (FIG. 5). Reference numeral 13 denotes a heat insulating material disposed on the waterproof layer 11.

  When the drainage groove forming mold 12 is constructed with the drainage groove forming mold and joint material 1 on the waterproof layer 11 laminated on the slab 10 in this way, concrete 14 is placed and the waterproof protective concrete is placed on the waterproof layer 11. At the same time, concrete 14 is placed between the groove wall members 2 facing each other, and the level is raised by the leveling member 3 to finish the groove bottom. By doing in this way, the drainage groove | channel 15 is shape | molded on the rooftop of the building finished with waterproof protection concrete (FIG. 6).

  Thus, in the formation of the drainage groove 15 using the drainage groove forming mold and joint material 1, the groove wall member 2 constituting the drainage groove forming mold and joint material 1 for constructing the drainage groove forming mold 12 and The plate-like portion 4 and the pedestal portion 6 are made of an elastic material, the cap portion 5 is made of a hard material having elasticity, and the leveling member 3 is also made of an elastic material. It is necessary to remove the drainage groove forming mold and joint material 1, that is, the groove wall member 2 and the leveling member 3 to construct the drainage groove forming mold 12 after placing the concrete 15, as a joint that absorbs expansion and contraction. However, the concrete can be cast in the drain groove forming mold at the same time as the concrete 14 is cast to finish the groove bottom, and the drain groove 15 can be formed.

  Therefore, it is possible to reduce the number of steps of forming the drainage groove 15 when finishing the waterproof protective concrete on the roof of the building, facilitating the molding operation of the drainage groove 15, and treating the waste material after dismantling of the conventional formwork. Such a problem disappears. In addition, there is no work for arranging joint materials for absorbing the expansion and contraction of waterproof protective concrete, which has been conventionally performed as a separate work from the formation of the drainage groove 15, and there are few contractors involved in the formation of the drainage groove 15. Therefore, it is possible to easily perform the waterproof protective concrete finishing work on the roof of the building.

  Furthermore, since the groove bottom of the drainage groove 15 is finished with concrete, the drainage groove 15 having durability can be obtained as compared with the drainage groove where the conventional groove bottom is finished with mortar.

BRIEF DESCRIPTION OF THE DRAWINGS The front view which shows an example of implementation of the drain ditch shaping | molding formwork and joint material which concerns on this invention. The perspective view which shows the groove wall member of this example. The perspective view which shows the leveling member of this example. The side view which shows the several leveling member formed in the height according to a water gradient. Explanatory drawing which shows the process of shape | molding a drainage groove, when using the drainage groove molding formwork and joint material which concerns on this invention, and finishing waterproof protection concrete on the roof of a building. Explanatory drawing which shows the process of shape | molding a drainage groove, when using the drainage groove molding formwork and joint material which concerns on this invention, and finishing waterproof protection concrete on the roof of a building.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drain groove forming mold and joint material 2 Groove wall member 3 Leveling member 4 Plate-shaped part 5 Cap part 5a, 5b Side plate 6 Base part 7 Fitting groove 8, 9 Anchor 10 Slab 11 Waterproof layer 12 Drain groove forming mold 13 Thermal insulation material 14 Concrete 15 Drainage channel

Claims (1)

  Drain groove forming formwork and joint material used to form drainage grooves when finishing waterproof protective concrete on the roof of a building, with elasticity from the top side to a plate-shaped part formed of elastic material A grooved wall member having a height corresponding to the waterproofing concrete placing surface, a laterally long dimension corresponding to the groove width of the drainage groove, and a water gradient at the groove bottom. A drainage groove forming formwork and joint material comprising a plurality of leveling members formed of an elastic material interposed between opposing groove wall members having a vertically long dimension according to the above.

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