JP4943142B2 - Chamfering formwork used in the in-corner construction method for grooves - Google Patents

Description

The present invention relates to a chamfering mold used in an in-corner construction method for a pit groove constructed by placing concrete.

  In a pit groove such as a wiring / pipe pit constructed by placing concrete, as shown in FIG. 11, an in-corner A or a T-shape located inside the L-shaped corner portion. Do not construct the in-corner B located at the inside of the corner of the branching point that forms a shape in a right angle in plan view, but construct it in a chamfered shape called a half-in corner that is bent twice in 45 ° increments. Is common. This is because if the in-corner A of the corner part and the in-corner B of the branch point part are formed in a right angle with concrete, the workability is poor because it gets caught in the corner when passing the wiring cable, and it gets caught in the corner. This is intended to prevent problems such as damage to the wiring cable and collapse of the corners of the concrete formed in a right angle when the cable is forcibly pulled in the state. Here, as shown in FIG. 12, the half-in corner has a half-in corner lid receiving frame c in which two receiving frame ridges d and d are connected at an angle of 135 °. Two are arranged for each corner. In addition, groove lids a and b (see FIG. 11) formed in different shapes corresponding to the opening shape of the groove are attached to the upper portions of the corner portion and the branch point portion.

  By the way, in the conventional method of constructing a groove with the in-corners A and B located inside the corner as described above as half-in corners, two corners are generated in one half-in corner. There is a problem in that it takes time to assemble the formwork and to install the half-in-corner lid receiving frame c, which increases the construction cost.

  Ordinary rectangular groove lids used for differently shaped groove lids a and b used for corner portions and branch points when straightly attaching groove lids formed in advance on completed groove paths. When there are many types of e, it takes time to find an appropriate deposition position, and there is a problem that workability is poor.

  Further, it is necessary to form the groove lids a and b (see FIG. 11) to be attached to the upper portions of the corner portion and the branch point portion in a different shape, and on the half-in-corner side of the groove lids a and b Since it is necessary to use two half-in corner lid receiving frames c formed at an angle of 135 ° for each half-in corner as the lid receiving frame for supporting the portion, the groove lids a and b and the half-in corner There is a problem that it takes time to manufacture the lid receiving frame c, which increases the production cost and increases the delivery time.

  Furthermore, the irregularly shaped groove lids a and b and the half-in corner lid receiving frame c used for the pit groove are produced on order without placing stock, and when the manufacturer receives an order, After drawing the allocation drawing of the irregularly shaped groove lids a and b and the half-in corner lid receiving frame c arranged on the road, the manufacture of the groove lids a and b and the half-in corner lid receiving frame c is performed based on the allocation drawing. However, there is a problem in that it takes time to create an allocation diagram when there are several types of irregularly shaped groove lids a and b and half-in-corner lid receiving frames c having different lengths.

  An object of the present invention is to provide an in-corner construction method for a groove that can solve the conventional problems, and a chamfering formwork used in the in-corner construction method.

According to the present invention, a chamfering mold formed in a substantially triangular block shape having a predetermined height having at least two side surfaces orthogonal to each other on a side peripheral surface is used for a pit groove path constructed by placing concrete. At the time of construction, on the outer bottom of the concrete formwork that is orthogonal to each other, at the lower part of the outside of the corner part or the in-corner part of the branch point of the concrete formwork that blocks the concrete that is assembled in the groove shape and placed outside Holding the two side surfaces in a state where they are in contact with each other, and placing concrete on the outside of the concrete formwork, the solidified concrete forms the upper part of the in-corner of the groove with a right angle, the bottom position of the in-corner, in-corner construction method of the groove passage and providing a chamfered portion that matches the shape of the chamfered for formwork A chamfering type frame you are.

  Here, the chamfering mold is a block shape having a predetermined height provided with two side surfaces orthogonal to each other and a side surface for chamfering on the side peripheral surface, and in particular, is formed in a substantially right-angled isosceles triangular prism shape. preferable. In addition, a lid receiving frame is temporarily fixed to the upper part of the outer surface of the concrete form assembled in a groove shape before placing concrete. Then, concrete is placed on the outside of the concrete formwork, and the lid receiving frame is disposed along the upper edges of the left and right side walls of the groove constructed by the solidified concrete. In this lid receiving frame, as the lid receiving frame disposed at the in-corner of the groove, a single lid receiving frame in which two receiving frame rods are connected at right angles can be used.

  In addition, the present invention provides a corner portion or a branch of a concrete formwork that blocks the concrete that is assembled in the groove shape and is placed outside when the pit groove is constructed by placing concrete. A substantially triangular block having a predetermined height provided at a lower position outside the in-corner of the point portion and provided with a chamfered portion at the lower position of the in-corner and having at least two side surfaces orthogonal to each other on the side circumferential surface It is formed in a shape, and is used in an in-corner construction method for a groove characterized by being held immovable in a state where the two side surfaces are in contact with the outer surfaces of concrete molds orthogonal to each other at the in-corner. It is a chamfering formwork.

  Here, the substantially triangular block-shaped chamfering mold is formed in a block shape having a predetermined height including two side surfaces orthogonal to each other and a side surface for chamfering on the side peripheral surface. What was formed in the shape of a triangular prism is preferable. As the material for the chamfering mold, polystyrene foam, hard synthetic resin, synthetic wood, metal plate, or the like can be used. Further, as a holding means for holding the chamfering mold form in a state where the two side faces are in contact with the outer surfaces of the concrete molds orthogonal to each other at the in-corner, a pressing and holding action in the downward direction is used. A dedicated holding device to be generated, or screwing with a concrete formwork, nailing, or the like can be appropriately selected depending on the material.

  The chamfering formwork is formed in a substantially right-angled isosceles triangular columnar shape having two side surfaces orthogonal to each other and a side surface for chamfering on the side circumferential surface, and at the corner where the two side surfaces orthogonal to each other and the upper surface intersect. A configuration is proposed in which sub-chamfered protrusions having sub-chamfered slopes inclined downwardly from the top projecting upward to the two side surfaces and the upper surface are coupled.

  Further, the chamfering mold is formed in a substantially right-angled isosceles triangular columnar shape having two side surfaces orthogonal to each other and a side surface for chamfering, and the side surfaces for chamfering are two side surfaces orthogonal to each other. A configuration that is curved in an arc shape is proposed. Here, it is preferable that the arc-shaped curve has a substantially quadrant shape.

  As described above, the present invention provides a pit constructed by placing concrete on a chamfering mold formed in a substantially triangular block shape having a predetermined height and having at least two side surfaces orthogonal to each other on the side peripheral surface. Concrete that is orthogonal to each other at the lower part of the corner part or the in-corner part of the branch point of the concrete form that blocks the concrete that is assembled in the groove shape and placed outside when the groove is constructed Holding the two side surfaces in a state where the two side surfaces are in contact with the outer surface of the formwork, and placing concrete on the outside of the concrete formwork, the upper part of the in-corner of the groove is formed into a right angle by the solidified concrete. And a chamfered portion corresponding to the shape of the chamfering formwork is provided at a lower position of the in-corner. Since a toner construction method, according to the construction method, while forming the upper part of the in-corner right angles, it is possible to perform the construction of providing a chamfer in the lower position of the in-corner at a time. As described above, when the wiring cable is passed through the groove by the chamfered portion provided at the lower position of the in-corner, the wiring cable is not caught and the wiring work can be smoothly performed. Since the upper part is formed in a right-angled shape, the construction cost can be reduced because it does not take time to assemble the concrete formwork and install the lid receiving frame as compared with the conventional half-in corner construction.

  In addition, since the upper part of the in-corner is right-angled in the completed groove, it is not necessary to form a groove cover to be attached to the corner part or the branch point part in an irregular shape, and it is attached to the other straight part. Similar to the groove lid, a normal rectangular groove lid can be used. Thereby, the operation | work which spreads and covers a groove cover can be performed comparatively easily.

  In addition, the groove cover to be attached to the corner part or the branch point part as described above may be a normal rectangular groove cover, and the cover receiving frame disposed in the in-corner connects two receiving frame rods at right angles. Since the single lid receiving frame is sufficient, the manufacture of the groove lid and the lid receiving frame is facilitated, the production cost can be reduced, and the delivery time can be shortened.

  Furthermore, since a deformed lid and a half-in-corner lid receiving frame are not required, it is easy to draw the allocation drawing used for manufacturing the groove lid and the lid receiving frame arranged in the groove.

  Further, the present invention provides a chamfering mold formed in a substantially triangular block shape having a predetermined height and having at least two side surfaces orthogonal to each other as a chamfering mold used in the above-described groove corner in-corner construction method. Because it is a frame, the chamfering formwork is placed in the corner at the lower corner of the corner or branch point of the concrete formwork that blocks the concrete that is assembled in the groove shape and placed outside. By placing the concrete in a state where the two side surfaces are brought into contact with the outer surfaces of the concrete molds orthogonal to each other and kept immovable, a substantially triangular block shape is formed at the lower position of the in-corner formed at a right angle. It is possible to easily provide a chamfered portion that sinks into the surface.

  In addition, the chamfering formwork is formed into a substantially right-angled isosceles triangular columnar shape having two side surfaces orthogonal to each other and a side surface for chamfering on the side peripheral surface, and at the corner where the two side surfaces orthogonal to each other and the upper surface intersect In the configuration in which the sub-chamfering projections with the sub-chamfering slope inclined downward from the top projecting to the two side surfaces and the upper surface are coupled, the concrete is placed at a right angle by consolidation of the cast concrete A sub-chamfered portion from which concrete has been previously removed can be easily provided at a lower position at the tip of the formed in-corner in a shape that matches the sub-chamfered protrusion. Thereby, collapse of the lower corner portion of the tip of the in corner can be prevented in advance.

  Further, the chamfering mold is formed into a substantially right-angled isosceles triangular columnar shape having two side surfaces orthogonal to each other and a side surface for chamfering on the side circumferential surface, and the chamfering side surfaces are formed in an arc shape on the two side surfaces orthogonal to each other. In the configuration formed by bending, the outer surface of the chamfered portion provided at the lower position of the in-corner can be formed in a circular arc shape by concrete consolidation. As a result, the angle of the corner where the side wall surface of the groove and the outer surface of the chamfered portion can be enlarged as much as possible, so that the wiring cable is hardly caught at the corner. it can.

Embodiments of the present invention will be described by the following examples.
First, the Example of the chamfering formwork 1 used for the in-corner construction method of the groove concerning this invention is demonstrated.

  As shown in FIGS. 1 to 3, the chamfering mold 1 is formed in a substantially triangular block shape having a predetermined height and having at least two side surfaces 2 and 2 orthogonal to each other on the side peripheral surface.

  Here, in the first embodiment shown in FIGS. 1A and 1B, the chamfering mold 1 is provided with two side surfaces 2 and 2 that are orthogonal to each other and a side surface 3 for chamfering on the side peripheral surface. It is formed in a substantially right-angled isosceles triangular prism shape. The chamfering mold 1 is formed in a solid shape or a hollow shape having an upper surface 4 by using foamed polystyrene, hard synthetic resin, synthetic wood, metal plate or the like as a material. In the case of using polystyrene foam, hard synthetic resin, or synthetic wood as a raw material, injection molding is applied, and in the case of using a metal plate as a raw material, press molding is applied. In addition, for example, when used for the construction of a standard wiring / pipe pit groove with a width and depth dimension of about 200 mm, the chamfering form 1 has a lateral width dimension of about 150 mm with two lateral sides 2 and 2 being high. Those whose length is set to about 50 to 100 mm are preferably used.

  Further, the chamfering mold 1 is provided with a sub-chamfered protrusion 5 at a corner where the two side surfaces 2 and 2 and the upper surface 4 intersect each other. The sub-chamfered protrusion 5 includes a sub-chamfered slope 6 that slopes downward from the top part protruding upward toward the two side surfaces 2, 2 and the upper surface 4 with a substantially downward slope of about 45 °. A sub-chamfer 7 (see FIG. 10) from which the concrete is removed in a shape corresponding to the sub-chamfering protrusion 5 is provided at the lower position of the tip of the in-corner formed at a right angle by consolidation of the placed concrete. Can be done.

  FIG. 2 shows a modified embodiment of the chamfering mold 1. FIG. 2A shows a chamfered side surface 3 formed by curving in a circular arc shape on two side surfaces 2 and 2 that are orthogonal to each other. Here, it is preferable that the chamfering side surface 3 is curved in a substantially quadrant shape. FIG. 2B shows a shape obtained by removing the sub-chamfered protrusion 5 from the chamfering mold 1 shown in FIG. Since this shape is the simplest, there is an advantage that manufacture is easy.

  FIG. 3 shows another modified embodiment of the chamfering mold 1. In this modified embodiment, the chamfering side surface 3 of the chamfering mold 1 is formed to bulge into a spherical shape. That is, the chamfering mold 1 has a shape that can be obtained by dividing a sphere into two equal parts vertically and horizontally in a horizontal plane passing through the center. The chamfering mold 1 formed in a substantially triangular block shape having a predetermined height includes such a shape and a similar shape, for example, a right isosceles triangular pyramid shape.

Next, the construction method of the in corner of the groove using the chamfering mold 1 of the first embodiment will be described.
FIG. 4 shows an example of a pit groove 8 such as a wiring / pipe pit constructed by placing concrete, the upper part of the in-corner A located inside the L-shaped corner, or the T-shape. The upper part of the in-corner B located inside the corner of the branching point is formed in a right angle in plan view (see FIG. 8), and the lower part of the in-corners A and B is substantially perpendicular to the lower part. A chamfered portion 9 (see FIGS. 9 and 10) that is recessed into an equilateral triangular prism shape is provided.

  In order to construct such a groove 8, as shown in FIGS. 5 and 6, concrete molds K and K are erected at predetermined intervals on slab concrete S constituting a building frame. Assemble to the groove shape. The concrete molds K and K block the concrete P placed on the outside, and the outer surface of the concrete molds K and K has a height position corresponding to the level of the concrete P to be placed. The lid receiving frames 10, 10 are temporarily fixed in an opposing manner. As shown in FIG. 5, the temporary fixing of the lid receiving frames 10, 10 is performed by fixing the lower part of the lid receiving frames 10, 10 to the concrete molds K, K with nails (or screws) 11. 10 is performed by connecting the anchor metal fitting 12 attached to the outer side of the slab concrete S to the upper end of the fixed rod 13 raised from the slab concrete S. The anchor fitting 12 includes a vertical insertion groove 14 having a substantially U-shaped cross section (see FIG. 6), and the upper end of the fixing rod 13 is inserted into the insertion groove 14. The anchor fitting 12 is connected to the fixing rod 13 by bringing the tip of the bolt 15 screwed from the side into pressure contact with the fixing rod 13 through its screwing action. Further, as the in-corner lid receiving frame 10 ′ temporarily fixed to the in-corners A and B, as shown in FIG. 7, a structure in which two receiving frame rods 16 are connected at right angles is used.

  And after assembling each concrete formwork K in groove shape as mentioned above, the above-mentioned chamfering formwork 1 is each arrange | positioned in the outer lower position of the in corners A and B. As shown in FIG. 5, the chamfering mold 1 is placed on the slab concrete S, and as shown in FIG. 6, two side surfaces 2 and 2 are formed on the outer surfaces of the concrete molds K and K orthogonal to each other. It keeps immovable in the state of contact respectively. Here, the holding means for holding the chamfering mold frame 1 immovably includes a presser plate 17 that is in contact with the upper surface 4 of the chamfering mold frame 1, a connecting rod 18 that is erected on the presser plate 17, and A holding device 19 constituted by the above-described anchor fitting 12 that connects the upper ends of the connecting rods 18 may be used. The holding device 19 has a pressing and holding action of pressing the chamfering mold 1 downward and holding it between the presser plate 17 and the slab concrete S. When the material of the chamfering mold 1 is hard synthetic resin, synthetic wood, or metal plate, it may be screwed to the concrete mold K using a tapping screw, and in the case of synthetic wood, It is also possible to nail the concrete formwork K using nails.

  Then, as described above, the chamfering mold 1 is immovably held at the lower positions outside the corners A and B, and then the concrete P is placed on the outside of the concrete molds K and K on the slab concrete S. Here, the concrete P is placed to a predetermined height position that coincides with the outer ends of the lid receiving frames 10 and 10. If the concrete form K and the chamfering form 1 are removed after the concrete P is consolidated, the groove 8 (see FIG. 4) is completed. As a result, the upper portions of the in corners A and B of the groove 8 are formed in a right angle as shown in FIG. 8, and the lower positions of the in corners A and B are shown in FIGS. As described above, a chamfered portion 9 is provided that matches the shape of the chamfering mold 1 and is recessed into a substantially right isosceles triangular prism shape. Further, a sub-chamfered portion 7 from which the concrete P has been removed in a shape matching the sub-chamfered projection 5 of the chamfering mold 1 is formed at the lower position of the front ends of the in-corners A and B formed at right angles (FIG. 10). Reference) is provided.

  Further, in the groove 8 constructed in this way, a plurality of groove lids 20 (see FIG. 4) formed in a rectangular shape have lid receiving frames 10, 10 in which both side edges are arranged opposite to the upper side walls of the groove 8. In a state of being supported by (or in-corner lid receiving frame 10 '), it is detachably attached.

  As described above, according to the construction method according to the present invention, the upper portions of the in corners A and B are formed in a right angle, and the construction for providing the chamfered portion 9 at the lower position of the in corners A and B can be performed at a time. it can. Then, when the wiring cable is passed through the constructed groove 8, the wiring cable is not caught by the chamfered portion 9 provided at the lower position of the inner corners A and B, and the wiring work is smoothly performed. In addition, the upper parts of the in-corners A and B are formed in a right angle, so that it is more troublesome to assemble the concrete formwork K and install the in-corner cover receiving frame 10 'compared to the conventional half-in corner construction. The construction cost can be reduced.

  Moreover, since the upper part of the in corners A and B is all right-angled, the completed groove 8 does not need to form the groove cover 20 which adheres to a corner part or a branch point part, and has another straight line. A normal rectangular groove cover 20 can be used in the same manner as the groove cover 20 attached to the portion. Thereby, the operation | work which spreads the groove cover 20 and it adheres can be performed comparatively easily.

  Further, as described above, the groove lid 20 to be attached to the corner portion and the branch point portion may be a normal rectangular groove lid 20, and the in-corner lid receiving frame 10 ′ disposed in the in-corners A and B is also used. Since the two receiving frame rods 16 connected at right angles can be used as a single unit, the groove lid 20 and the in-corner lid receiving frame 10 'can be easily manufactured, the production cost can be reduced, and the delivery time can be shortened. be able to.

  Further, since the conventional deformed lid and the half-in-corner lid receiving frame are not required, it is easy to draw the allocation drawing used for manufacturing the groove lid 20 and the in-corner lid receiving frame 10 ′ disposed in the groove 8. .

  Further, the present invention provides a chamfering mold 1 used in the in-corner construction method of the groove 8 and has a predetermined height provided with two side surfaces 2 and 2 that are orthogonal to each other and a side surface 3 for chamfering. Since it is formed in the shape of a triangular block, the chamfering formwork 1 is placed on the outside lower part of the corners or branch points of the corners or branch points of the concrete formwork K assembled in a groove shape. By placing concrete P in a state of holding the two side surfaces 2 and 2 immovably on the outer surfaces of the concrete molds K and K that are orthogonal to each other at the in-corners A and B, respectively. A chamfered portion 9 that is recessed in a substantially triangular block shape can be easily provided at a lower position of the formed in corners A and B.

  Further, in the chamfering mold 1, the corners where the two side surfaces 2, 2 and the upper surface 4 intersect with each other are inclined downward from the top protruding upward to the two side surfaces 2, 2 and the upper surface 4. When the sub-chamfering projection 5 having the sub-chamfering slope 6 is coupled, the sub-chamfering projection is formed at the lower position of the tips of the in-corners A and B formed by consolidating the cast concrete P. The sub chamfered portion 7 from which the concrete P has been removed in a shape corresponding to the portion 5 can be easily provided. As a result, it is possible to prevent the lower corners of the tips of the in corners A and B formed at right angles by the solidified concrete P from being collapsed.

  Further, in the chamfering mold 1, when the chamfering side surface 3 is formed to be curved in an arc shape on the two side surfaces 2 and 2 orthogonal to each other, the inside corners A and B of the concrete P are consolidated. The outer surface of the chamfered portion 9 provided at the lower position can be bulged in a circular arc shape. Thereby, the angle of the corner portion where the side wall surface of the groove 8 and the outer surface of the chamfered portion 9 contact can be expanded as much as possible, and the wiring cable is hardly caught at the corner portion. The work can be performed more easily.

The 1st Example of the chamfering formwork 1 concerning this invention is shown, (a) is an external appearance perspective view, (b) is a top view. It is a perspective view which shows the deformation | transformation Example of the chamfering formwork 1. FIG. The other modified example of the chamfering mold 1 is shown, (a) is an external perspective view, (b) is a plan view. It is a top view which shows an example of the groove | channel 8 for pits formed using the chamfering formwork 1 concerning this invention. It is a sectional side view which shows the in corner construction method using the formwork 1 for chamfering. It is a top view which shows the in corner construction method using the formwork 1 for chamfering. It is a top view which shows the lid receiving frame 10 'for in corners. It is a top view of the corner part of the completed groove 8. It is a cross-sectional view of the lower part of the corner part of the completed groove 8. It is a sectional side view of the corner portion of the completed groove 8. It is a top view which shows the groove channel for the conventional pit. It is a top view which shows the conventional lid receiving frame c for half-in corners.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Chamfering form 2 Two sides 3 Chamfering side 4 Upper surface 5 Sub chamfering protrusion 6 Sub chamfering slope 8 Groove 9 Chamfering part A, B Inner corner K Concrete formwork P Concrete

Claims (2)

When constructing a pit groove constructed by placing concrete, the corner part of the concrete formwork that cuts off the concrete that is assembled in the groove shape and is placed on the outside, or the in-corner of the junction point The chamfered portion is provided at the lower position of the in-corner, disposed at the outer lower position,
At least two side surfaces orthogonal to each other are formed in a substantially triangular block shape with a predetermined height provided on the side circumferential surface, and two side surfaces from the top protruding upward at the corner where the two side surfaces orthogonal to each other and the upper surface intersect each other and A sub-chamfered protrusion having a sub-chamfered slope that slopes downward toward the upper surface is coupled , and the two side surfaces abut on the outer surfaces of the concrete molds orthogonal to each other at the in-corner and cannot move. A chamfering formwork used in the in-corner construction method of a groove characterized by being held. It is formed in a substantially right-angled isosceles triangular columnar shape with two side surfaces orthogonal to each other and a side surface for chamfering, and the side surface for chamfering is curved in an arc shape on the two side surfaces orthogonal to each other. A chamfering mold used in the in-corner construction method for a groove according to claim 1 .

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