JP3670558B2 - Concrete formwork for windows and construction method using concrete formwork for windows - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a concrete formwork for windows and a construction method using a concrete formwork for windows.
[0002]
[Prior art]
6-8, the protrusion 105 is normally formed in the opening 104 for windows for forming the window which attaches a metal sash to the concrete base | substrate 103. As shown in FIG. The concrete mold body 100 that forms the window opening is divided into an upper mold frame 101 and double-sleeve mold frames 102, 102, but is opposed to the inner surface of the window opening 104 of the concrete mold frame body 100. A concave notch 106 into which the protrusion 105 fits was formed (see FIG. 7).
[0003]
The concrete formwork body 100 is made of wood having water absorbency, and is manufactured for each window by a worker at a construction site. Then, concrete is placed using the concrete formwork body 100 and another formwork 110 (a flat formwork used when placing a flat surface with concrete), and when the placed concrete hardens, it is removed and discarded. It was. The mold 110 is repeatedly used repeatedly.
[0004]
[Problems to be solved by the invention]
FIG. 8 is an enlarged cross-sectional view of the main part as viewed from above from below in FIG. As described above, as shown in FIG. 8, the ridge 105 is formed on the edge of the inner surface of the opening 104 of the window on the outer wall side.
Therefore, in order to remove the two-sleeve molds 102, 102, after removing the other molds 110, 110, the wedge-shaped tool is inserted from the position indicated by the arrow A and removed. However, the wooden concrete formwork main body 100 is provided with water absorption, and the wooden concrete formwork main body 100 and the hardened concrete base 103 are firmly fixed, and the base of the ridge 105 (arrow B) is located. In many cases, cracks were formed and the ridges 105 were damaged, and the repair was expensive.
[0005]
In addition, the wooden concrete formwork body 100 is disposable because it is damaged when it is removed, but recently, due to various circumstances such as generation of dioxins, incineration is impossible, and the disposal cost of the used concrete formwork body 100 is reduced. Has also become enormous. The present invention has been conceived from the above-mentioned present situation, and provides a concrete form for windows and a construction method using a concrete form for windows that can be reused without damaging the protrusion 105 when removed. It is aimed.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, a concrete formwork for a window according to the present invention forms a concrete foundation for a window having a ridge that follows the edge of the inner wall surface of the opening. A window concrete formwork having an upper formwork and a two-sleeve formwork provided with a plate of the upper formwork and a two-sleeve formwork plate attached to the surface of the concrete base side of the plate and formed on the concrete base side A wooden trapezoidal member (13) in which a non-water-absorbing material is attached to an inclined surface opposite to the protruding shape, and when attaching both sleeve molds to both ends of the upper mold, both ends and both of the upper mold an elastic member interposed between the attachment means provided in the upper upper mold side of the sleeve mold, to strip the upper mold and both sleeves formwork from Da設been concrete under the ground, the upper mold And peeling means attached to both sleeve molds .
[0007]
The non-water-absorbing material is made of synthetic resin, the peeling means, and the opposing surface and the direction respectively volts der was install them constituting the intersection of the concrete under the ground of the upper mold and both sleeves formwork You can also.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below together with illustrated examples. FIG. 1 is an exploded perspective view of a concrete formwork for a window according to the present invention. FIG. 2 is a side view of the upper mold frame as viewed from the direction A in FIG. FIG. 3 is an enlarged cross-sectional view of a main part viewed from below in a state in which the concrete form for a window according to the present invention is attached. FIG. 4 is an enlarged vertical cross-sectional view of a main part in a mounted state of the concrete formwork for a window according to the present invention. FIG. 5 is an enlarged cross-sectional view of the main part as viewed from below in the state of attachment of the concrete formwork for windows according to the present invention.
[0009]
Hereinafter, the main member of the concrete formwork for windows of the embodiment to be described is made of wood, but it may be made of metal or synthetic resin, and is related to the wood material described below. is not. This window concrete formwork is used when forming concrete foundations for windows with ridges that follow the edge of the inner wall of the opening when forming windows with metal sashes for concrete buildings. It is a frame.
[0010]
As shown in FIGS. 1-4, the concrete formwork main body 1 is formed first. This concrete formwork body 1 is formed of an upper formwork 10 and double sleeve formwork 20, 20, and the upper end parts of the double formwork molds 20, 20 are attached to the attachment means 40, 40 at both ends of the upper formwork 10. The bolts 50 and 50 which are main body peeling means are attached to the upper mold frame 10 and the both-sleeve mold frames 20 and 20, respectively.
[0011]
The upper mold frame 10 is attached with splints 12 and 12 having a rectangular cross section as reinforcing members along the lower surfaces of both sides of the plate 11 having the same width as the inner surface of the opening of the wall. A trapezoidal member 13 having a trapezoidal cross section is attached, leaving a space in which the protrusion 105 is fitted.
[0012]
As shown in FIG. 2, the trapezoidal member 13 includes a member 14 having a rectangular cross section and a trapezoidal member 16 having a trapezoidal cross section covered with a non-water absorbent material 15. The inclined surface of the trapezoidal member 16 is formed so as to face the outer wall side, that is, to face the inclined surface of the protrusion 105 formed in the opening 104. The non-water-absorbing material 15 is formed of a synthetic resin or a metal plate, and absorbs moisture in the placed concrete so as not to be fixed. As shown in FIG. 5, the surface of the concrete base 103 on the inner surface of the opening It is desirable to form the entire surface opposed to the non-water-absorbing material 15a. This non-water-absorbing material 15a can be achieved by manufacturing the entire upper mold 10 with metal or synthetic resin, or by manufacturing the plate 11 and the trapezoidal member 13 with metal or synthetic resin. Or by other means.
[0013]
At both ends of the plate 11, (in the figure indicated by the L-type protrusions) projections 4 1, 4 1 of the elastic member 4 2 impregnated by a plate-like been suspended, the elastic body 4 2 and the elastic member 4 2 are affixed plate-like projections 4 1, 4 to 1, the hole 41a for inserting the bolt 44 to be described later, 42a are formed.
[0014]
A bolt 50 is provided as the peeling means. The bolt 50 is provided with a hole 51 in a direction orthogonal to the surface of the concrete base 103 on which the upper mold 10 is placed, and is screwed into the hole 51 so as to be inserted therethrough. In FIG. 4, a female screw washer 52 whose opening communicates with the concrete side of the hole 51 of the upper mold 10 is attached, and the concrete is attached to the tip of the bolt 50 with the bolt 50 screwed, and the bolt 50 is screwed. A sheet 53 is attached to a washer 52 with a female screw so as not to be immovable. The peeling means (bolt) 50 is not limited to the bolt 50 described above, and may be a peeling sheet attached to the surface of the upper mold frame facing the surface of the concrete base 103. The upper mold frame 10 Any means may be used as long as the protrusion 105 provided along the edge of the opening 104 is not damaged at the time of removal, and the non-water-absorbing material 15, 15a is also applied.
[0015]
The sleeve molds 20, 20 are formed as symmetrical sleeve molds 20, 20, and as reinforcements along the side surfaces on both sides of the plate 21 having the same width as the inner surface of the opening 104, similar to the upper mold frame 10. The splints 22 and 22 having a rectangular cross section are attached. A trapezoidal member 23 is attached to the surface of the plate 21 on the concrete base 103 side, leaving a space in which the protrusion 105 is fitted from the inner wall side to the outer wall side. As shown in FIG. 1, the trapezoidal member 23 includes a member 24 having a rectangular cross section and a trapezoidal member 26 covered with a non-water-absorbing material 25.
[0016]
A projection 27 is provided on the upper end of the plate 21 of the sleeve mold frame 20 toward the inside, and a plate-like projection 45 (shown as an L-shaped projection in the figure) in which a hole 45a is formed at the tip of the projection 27. Is drooping.
The bolt 44 with nut 43 provided separately communicate the bolts 44 each of the holes 45a, 42a, to 41a of the elastic member 4 2 in a sandwich state between the projections 4 1 of the upper mold 10 and the projection 45, The nut 43 is screwed and fixed. The attaching means 40 includes an elastic body 4 2 , a protrusion 4 1 , a bolt 44 with a nut 43, and a protrusion 45.
[0017]
A trapezoidal member 26 covered with the non-water-absorbing material 25 is horizontally attached to the lower end of the trapezoidal member 26 on the surface of the lower part of the plate 21 on the concrete base 103 side. An elastic body 28 is attached to the upper surface. The elastic body 28 separates the trapezoidal member 23 attached to the surface of the plate 21 on the concrete base 103 side and the space in which the protrusion 105 on the outer wall side of the concrete base 103 fits. The non-water-absorbing material 25 that covers the trapezoidal members 23 and 26 is the same material as that of the upper mold 10.
[0018]
Mounting means and the upper mold frame 10 mounting the both sleeves formwork 20, 20 40, the projection 4 1 was impregnated is suspended across the elastic body 4 second plate 11 of the upper mold 10, 4 1 a, both sleeves formwork and 20, 20 protrusion 45 which is suspended in the projection 27 projecting from the inner side of the upper end of these projections 4 1, 45 and the elastic body 4 second hole 41a, 42a, a nut 43 bolt 44 inserted through 45a It has become.
[0019]
However, the present invention is not limited to the illustrated attachment means 40, 40. For example, a U-shaped cross-section member and a wedge are separately provided, and the U-shaped cross-section member is externally fitted in a state where the plate-shaped protrusions are juxtaposed via an elastic body. A wedge is tightly inserted between the U-shaped projection and the U-shaped cross-section member, a clamp is provided at the position of the projection, and a locking member for locking the locking portion of the clamp is provided at the position of the other projection. As long as attachment means can be considered and the upper mold frame and both sleeve mold frames can be detachably attached, the attachment means 40 of any shape and method may be used (not shown).
[0020]
In the window required form of the above embodiment, the upper form 10 and the two sleeve forms 20 and 20 are formed of three members, but the upper form 10 and one of the sleeve forms 20 are connected to the L shape. However, it can also be formed by two members with the other sleeve formwork 20.
[0021]
The window concrete form having the above-described configuration is used as follows. The sleeve molds 20 and 20 are temporarily attached to both sides of the position where the window of the concrete building is provided, and the upper mold 10 is temporarily attached between the upper portions of the both sleeve molds 20 and 20 by the attaching means 40 and 40. Next, the projections 42, 42 suspended from both ends of the upper mold 10 and the projections 45, 45 suspended from the projections 27, 27 projecting inside the upper ends of the sleeve molds 20, 20 are juxtaposed in parallel, respectively. , 40 bolts 44, 44 are connected to each other, and nuts 43, 43 are screwed and fixed. The concrete formwork body 1 composed of the upper formwork 10 and the two-sleeve formwork 20, 20 is a torii type, that is, a U-shape with the lower part opened, and the lower formwork and other walls arranged inside and outside the wall surface. Used with formwork 110,110.
[0022]
In this manner, the concrete mold body 1 is placed at a predetermined position together with the lower mold 111 and the other molds 110 and 110, and the interior of the space in which the concrete is assembled by the molds 1, 110, 110 and 111. Inject. The other molds 110 and 110 inside and outside the wall surface are removed from the concrete base 103 cured after a predetermined time, and then the lower mold 111 is removed.
[0023]
After that, the bolts 44 and 44 with nuts 43 of the attaching means 40 and 40 for fixing the upper mold frame 10 and the both sleeve mold frames 20 and 20 are loosened and removed. Next, the bolt 50 of the upper mold 10 is screwed. When the bolt 50 is screwed in this way, the end of the bolt 50 presses the hardened surface of the concrete base 103, and the upper mold frame 10 is lifted off by reaction. Subsequently, the bolts 50 and 50 (two bolts are shown in the figure but may be one bolt) of the both-sleeve molds 20 and 20 are screwed in the same manner as the upper mold 10. Remove with.
[0024]
When the concrete formwork body 1 is lifted by the screwing of the bolts 50 and 50, no load is applied to the ridges 105 and 105 on the outer wall side of the opening 104 of the concrete base 103, so that the bases of the ridges 105 and 105 are cracked. It will not be damaged. Further, the inclined surface of the facing surface of the concrete base 103 that is most loaded when the concrete mold body 1 is lifted by the bolts 50 and 50 is formed or covered with the non-water-absorbing material 15 or 25. The fixing force between the trapezoidal members 16 and 26 formed or covered with the non-water-absorbing materials 15 and 25 and the concrete base 103 is weak, and the concrete formwork body 1 is easily lifted and peeled off by screwing in the bolts 50 and 50. Therefore, the concrete mold body 1 can be used repeatedly without being damaged. In the case of the wooden concrete formwork body 1, it can be used repeatedly 5 to 10 times, and in the case of metal, it can be used several tens of times.
[0025]
Since the concrete formwork body 1 is repeatedly used in this way, the production cost can be reduced to a fraction of a fraction of the conventional window concrete formwork, and the cost of disposal due to damage can be reduced. The cost can be reduced to a fraction of a fraction to a few tenths, and various inconveniences such as generation of dioxins by incineration are reduced.
[0026]
Detachably formed by means 40 attached to the upper mold 10 and both sleeves formwork 20, 20, the attachment means 40 projections 4 1, 45, nuts 43 bolts 44, a simple structure of the elastic member 4 2 Since it is formed, it can be produced at a low cost in the factory, has little damage, and can reduce running costs.
[0027]
Further, by interposing the elastic member 4 2 between the projections 4 1, 45 hanging down the upper mold frame 10 in both sleeves mold 20,
Since the elastic body 28 is interposed between the trapezoidal members 23 and 26 of the sleeve mold 20, even if an excessive load is applied when the upper mold 10 and the both sleeve molds 20 and 20 are attached and removed, Since these elastic bodies 41 and 28 absorb the load, damage to the members 10, 20, and 20 is reduced, and the number of times of repeated use can be improved.
[0028]
【The invention's effect】
The concrete formwork for windows having the above structure is provided so that a bolt as a peeling means can be screwed in a direction intersecting with the opposing surface of the concrete base, so that the concrete formwork body is raised when the concrete formwork body is lifted by screwing the bolt. Since no load is applied to the ridge on the outer wall side of the base opening, the base of the ridge is not cracked or damaged.
[0029]
In addition, when the concrete formwork main body is lifted by screwing in the bolt, the inclined surface of the opposite surface of the concrete base, which is the most loaded, is formed or covered with a non-water-absorbing material. Alternatively, the adhesive force between the covered trapezoidal member and the concrete base is weak, and the concrete formwork body is easily lifted and peeled off by screwing in the bolts, so that the concrete formwork body can be used repeatedly without being damaged.
[0030]
Since the concrete formwork body is used repeatedly in this way, it can be reduced to a fraction of the manufacturing cost of a conventional concrete formwork for windows, and the cost of disposal due to damage is also low. The cost can be reduced from a fraction to a fraction of a tenth, and various inconveniences such as generation of dioxins by incineration can be greatly reduced.
[0031]
The upper and both sleeve molds are detachably formed by attachment means, and this attachment means is formed by a simple structure such as a projection, bolt with nut, and elastic body, so that it can be manufactured at low cost and damaged. The running cost can be reduced. In addition, since an elastic body is interposed between the upper mold frame and the protrusions hanging from the both sleeve mold frames, and an elastic body is interposed between the two types of trapezoidal members of the sleeve mold frame, the upper mold frame and both sleeves Even when an unreasonable load is applied when attaching and detaching the formwork, the elastic body absorbs the load, so that the damage to these members is reduced, and the number of times of repeated use can be improved.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a concrete formwork for a window according to the present invention.
FIG. 2 is a side view of the upper mold frame as viewed from the direction A in FIG. 1;
FIG. 3 is an enlarged cross-sectional view of a main part viewed from below in a state where the concrete formwork for a window according to the present invention is attached.
FIG. 4 is an enlarged vertical cross-sectional view of a main part in a mounted state of a concrete formwork for a window according to the present invention.
FIG. 5 is an enlarged cross-sectional view of a main part viewed from below in a state where the concrete formwork for a window according to the present invention is attached.
FIG. 6 is a perspective view showing an opening of a concrete wall to which a concrete form for a window is attached.
FIG. 7 is a perspective view showing a state in which a conventional window concrete form is attached to an opening of a concrete wall.
FIG. 8 is an enlarged cross-sectional view of a main part as viewed from above from below in FIG. 7;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Concrete formwork body 10 Formwork 15,15a, 25 Non-water-absorbing material 20 Sleeve formwork 40 Attaching means
41 Projection 4 2 Elastic body 43 Nut 44 Bolt
45 Projection 50 Bolt 103 as peeling means 103 Concrete foundation 104 Opening 105 Projection

Claims (3)

In order to form a concrete foundation for windows having a ridge that follows the edge of the inner wall surface of the opening, a concrete form for windows having an upper mold frame and a double sleeve mold frame with a wooden board having a width substantially the same as the wall thickness. There,
A wooden trapezoidal shape in which a non-water-absorbing material (15a) is attached to an inclined surface that is attached to the surface of the concrete base side of the plate of the upper mold frame and the two-sleeve mold frame and faces the protruding shape formed on the concrete base side. A member (13);
An elastic body (42) interposed between both ends of the upper mold frame and attachment means provided on the upper upper mold frame side of the both sleeve mold frame when attaching both sleeve mold frames to both ends of the upper mold frame;
A peeling means (50) attached to the upper mold frame and both sleeve mold frames in order to peel the upper mold frame and both sleeve mold frames from the placed concrete base surface;
A concrete formwork for windows characterized by comprising: The non-water-absorbing material is made of synthetic resin,
Said release means, the upper mold and both sleeves formwork facing surface with the window for concrete formwork according to claim 1 Symbol mounting, characterized in that in a direction intersecting a respective mounted bolt concrete under ground.   The construction method by the concrete formwork for windows which removes the concrete formwork for windows of Claim 1 or 2, and uses repeatedly.

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