JP3929324B2 - Batter for concrete formwork - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a concrete formwork butter material for supporting a weir plate which is a main component of a formwork in the construction of various concrete structures.
[0002]
[Prior art]
Conventionally, when building various concrete structures such as buildings and civil engineering, steel pipes such as round pipes and square pipes, or groove-shaped steels are used as formwork butter materials attached to the outside for the purpose of supporting the dam plate. Steel shapes such as lip and groove steel are widely used. The former steel tube butter material is formed by bending a steel plate into a predetermined shape by press working, and then welding the abutting side edge portion into a tubular shape. Therefore, it is more expensive than the latter shape steel such as channel steel. It is. Furthermore, when assembling the concrete formwork, it is necessary to use a dedicated washer, a tight fitting such as foam tie (registered trademark), in addition to the separator disposed between the weir plates. On the other hand, butter materials using channel steels such as channel steel are relatively inexpensive but are standardized and the types thereof are limited, so that they are often not applicable to formwork depending on use conditions. Since these butter materials are in a shape that cannot be stored in a nested state, they are usually bundled in a parallel state during transportation or storage. However, even in such a bundling state, if there are a large number of butter materials, it becomes quite bulky, and securing the space may be a problem in transportation and storage. Furthermore, handling of bulky materials also leads to a decrease in workability. In addition, since these butter materials are relatively heavy, they have a common common problem, such as not necessarily good in the assembly work of the mold.
[0003]
Therefore, in order to improve the above problems, Japanese Utility Model Laid-Open No. 61-69347 discloses that both side portions are formed in a groove shape that is slightly opened to the outside, and flanges continuous in the longitudinal direction at the side edge portions. A butter material provided with a portion is disclosed (FIG. 5). Here, the flange portions on both sides compensate for a decrease in rigidity as a butter material associated with the inclined side surface portion. This butter material is intended for a weir plate made of a flexible material such as a wire mesh, but when adopting such a shape, it can be stacked in a nested state, Even if many are bound, they do not become bulky. Furthermore, this groove-shaped butter material has advantages that the steel tube butter material and the like do not have, such as easy manufacture and light weight.
[0004]
[Problems to be solved by the invention]
By the way, the groove-shaped butter materials disclosed in the above publication do not completely fit into the grooves of the adjacent butter materials when stacked in a nested manner. That is, as shown in FIG. 10, since the stacked butter materials 10 have the same shape, each butter material 10 stops in the middle of the inclined side surface portion 10 </ b> A and does not enter deeper than that. Therefore, a slight gap remains between the bottom surface portions 10B and 10B and between the flange portions 10C and 10C on both side edges. The butter material 10 stacked in such a stacked state is, for example, stacked in a large number with the bottom surface portion 10B facing downward, or when tightly bound by a steel band, depending on its weight and tightening force. There is a possibility that the inclined side surface portions 10A and 10A may be deformed in a direction in which the space is widened. Such deformation causes a decrease in the rigidity of the entire butter material. Furthermore, the flange portion 10C that is parallel to the bottom surface portion 10B and protrudes outward, that is, to the side, is not limited to handling alone, but also causes damage to the operator even in a laminated state, as compared to a steel band. It was also a factor that hinders the use of plastic ties that are easy to handle. The present invention has been made in view of the problems of these conventional techniques, and can be bundled without being bulky, has excellent rigidity as a butter material, and also has improved safety and the like. It is for the purpose of provision.
[0005]
[Means for Solving the Problems]
To solve the above problems, the invention according to claim 1 of the present patent application, a bottom portion having an insertion hole of the separator at predetermined intervals along the longitudinal direction, a pair of side surfaces arranged in the opposing state to the side edges The bottom surface side comes into contact with the weir plate or vertical butter material constituting the concrete formwork, and the protruding end of the separator is received in the insertion hole, and is fixed between the side surfaces by a tightening means such as a nut. in concrete form for Bata material, together with the side surface portion is inclined outwardly, respectively, have a stepped portion extending in the longitudinal direction in the middle portion, respectively, the side edge portions forms a groove folded outwardly It is characterized by that.
[0006]
According to the above configuration, each side edge side portion of the pair of side surface portions becomes a groove portion and continues in the longitudinal direction. Therefore, compared to the conventional example formed in a flange shape, resistance to bending is increased, and unit weight is increased. if the same cross section, become significantly above or I shall in terms of the cross-section performance (stiffness). Further, the side edge side portion of the side surface portion inclined outward is folded back further in the direction of the bottom surface portion than parallel to the bottom surface portion, thereby making it difficult for the operator to contact the cut surface at each side edge side portion at an acute angle. , Also helps prevent injury. This is the same even in the case of binding, and an inexpensive and easy-to-removable plastic can be used instead of the steel band. Furthermore, there is a step extending in the longitudinal direction in the middle part of the pair of side surface parts, and this becomes resistance to bending deformation similarly to the groove part formed on the side edge side part of the butter material. Due to the synergistic action of the step, there is an effect of greatly improving the rigidity of the entire butter material as compared with the same plate thickness and size.
[0007]
The invention according to claim 2 of the present application further includes a bottom surface portion having insertion holes for the separator at a predetermined interval along the longitudinal direction, and a pair of side surface portions arranged in opposite states on both side edges thereof, and is a concrete mold. Concrete mold butter material that abuts the bottom surface side against the weir plate or vertical butter material constituting the frame, receives the protruding end of the separator into the insertion hole, and fixes it between the side surfaces with a tightening means such as a nut. Each of the side surfaces is inclined outward, the side edge side portion is folded outward to form a groove portion, one end portion is cut out by a predetermined length on one end side, and the other side portion is cut on the other end side. The end portion is cut out by a predetermined length .
[0008]
According to such a configuration, in addition to the improvement in cross-sectional performance similar to that of the invention according to claim 1, when connecting the butter material in the longitudinal direction, when the end portions are overlapped, the side portions are arranged on the same side. Since they do not overlap with each other, they can be integrated in a straight line by accurately matching the center lines of the bottom surfaces of each other.
[0009]
Furthermore, the invention according to claim 3 of the present application includes a bottom surface portion having insertion holes for the separator at predetermined intervals along the longitudinal direction, and a pair of side surface portions disposed in opposing states on both side edges thereof, and a concrete mold Concrete mold butter material that abuts the bottom surface side against the weir plate or vertical butter material constituting the frame, receives the protruding end of the separator into the insertion hole, and fixes it between the side surfaces with a tightening means such as a nut. The side surface portions are inclined outward, and the side edge side portions are folded outward to form groove portions, and the groove portions can be engaged with the back surface portions of the adjacent groove portions of the butter material in a stacked state. It is characterized by that. According to such a configuration, in addition to the improvement in cross-sectional performance similar to that of the invention according to claim 1, the groove portions provided in the side edge side portions of the pair of side surfaces facing each other, when the butter material is stacked in a nested manner Since the back surface portion of the groove portion of the adjacent butter material can be locked, the opening side portion and the back surface side portion are engaged with each other at each side edge side portion, that is, somewhat fit and restrain each other. Become. As a result, when a large number of butter materials are stacked and tightened with a binding band, or when many are stacked with the bottom side facing down, the space between the side surfaces that leads to a decrease in the rigidity of the butter material during transportation and storage Can be effectively prevented from spreading.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
A concrete formwork butter material according to the present invention is characterized in that each side edge side portion of a pair of side surface portions each inclined outward in an opposing state is formed in a groove shape extending in the longitudinal direction. . Thereby, it is possible to stack in a nested manner, and at the same time, sufficient rigidity as a butter material is ensured. Therefore, the present invention can be applied to various places such as a building foundation, a slab, and a wall, and can be used for civil engineering by selecting a plate thickness or the like. Such a butter material can be easily manufactured by, for example, a forming method in which an appropriate flat plate is passed between grooved rolls, so that the manufacturing cost is significantly higher than that using a conventional steel pipe butter material or a shape steel. Go down. For this reason, in consideration of the cost required for the cleaning work associated with the disassembly and reuse of the mold, the total cost can be reduced even when the butter material is left as it is. Therefore, for example, it is preferable to apply to a formwork in which a dam is left as it is even after placing concrete, such as a lath formwork used as a formwork of a foundation portion of a building. It is also possible to apply to a general formwork that assumes repeated use such as a steel plate formwork or a plywood formwork, and to disassemble the formwork after concrete placement and reuse the butter material. In addition, although illustrated below regarding the specific structure of the concrete formwork butter material, of course, it is not limited to this.
[0011]
【Example】
Embodiments of the present invention will be described below based on the drawings. FIG. 1 and FIG. 2 are respectively a front view showing an embodiment of a concrete form butter material according to the present invention and an enlarged perspective view of an end portion thereof. The concrete formwork butter material 1 shown in the figure has a basic shape of a groove-like body in which a pair of side surface portions 12a and 12b rises from the both side edges of the bottom surface portion 11 so as to be slightly inclined outward. And each side edge side part (free end side) of these side surface parts 12a and 12b is return | folded outside along the longitudinal direction, and becomes groove part 13a, 13b. In forming these groove parts 13a and 13b, the bending dimension is set to a height at which a stacked state described later can be realized. Furthermore, steps 14a and 14b are formed along the longitudinal direction at substantially the center portions of the side surfaces 12a and 12b. Here, one side surface portion 12a has an end portion 15a cut out by a predetermined length on one end side, and an end portion 15b of the other side surface portion 12b similarly cut by a predetermined length on the other end side. It is missing. Further, in the bottom surface portion 11, a plurality of long holes 16 are formed in the end portion 15 a and the end portion 15 b (notched portion) where the side surface portions 12 a and 12 b are cut out, and other intermediate portions. The insertion holes are provided at predetermined intervals.
[0012]
FIG. 3 is a side view showing a state in which the concrete formwork butter material 1 according to the present invention is stacked and bound for transportation or the like. Here, 20 concrete formwork butter materials 1 are laminated in a nested state, and their periphery is united by binding with a steel band 2 with an appropriate fastener 21. In this case, each of the concrete formwork butter materials 1 has groove portions 13a and 13b provided on both side edge portions, and the back surface portions 17a and 17b of the groove portions 13a and 13b in the adjacent concrete formwork butter materials 1 respectively. It will be in a state that fits somewhat. That is, in the concrete formwork butter material 1 of the embodiment, the height of the bent portion located on the free end side of the groove portions 13a and 13b is the bottom surface portion caused by the difference in width between the front side and the back surface side of the bottom surface portion 11. It is set somewhat higher than the gap between 11. As a result, the concrete formwork butter materials 1 are engaged with each other on the opening side and the back side of the groove portions 13a and 13b at the both side edge portions, and the upper-side member restrains the lower-side member. Therefore, even when the steel band 2 is strongly tightened, the widening deformation between the side surface portions 12a and 12b that causes a reduction in rigidity does not occur. Furthermore, since each side edge side portion (free end side) of the side surface portions 12a and 12b is folded back, the cut surface (side end surface) continuing in the longitudinal direction does not jump out sideways. The operator is less likely to be injured, and it is also possible to use a plastic tying band such as polypropylene that is inexpensive and easy to handle. When the bottom surface 11 or the back surface portions 17a and 17b are used as reference surfaces, the inclination angle of the bent portion on the free end side in the groove portions 13a and 13b (the bending angle with respect to the back surface portions 17a and 17b) and the side surface portions 12a and 12b. Are equal to each other (the bending angle with respect to the bottom surface portion 11 or the back surface portions 17a and 17b), the contact state between the side surface portions 12a and 12b and the engagement state between the groove portions 13a and 13b are obtained in the stacked state. Since it occurs simultaneously, the resistance to widening deformation is further increased.
[0013]
FIG. 4 and FIG. 5 are a front view and a cross-sectional view, respectively, showing a usage state when the concrete formwork butter material 1 according to the present invention is applied to a basic formwork. The barrier plate 3 used here is a so-called lath panel. For example, as disclosed in Japanese Patent No. 2903400, a plurality of vertical ribs 31 are provided in parallel at predetermined intervals, and a large number of inclined cuts 32 are formed in an aligned state between the vertical ribs 31, 31. It has a configuration. In the drawing, the cut 32 is shown only in a part of the barrier plate 3, and the description of the other parts is omitted. In each of the vertical ribs 31 of the barrier plate 3 used here, a plurality of round holes 33 for penetrating the separator are provided at predetermined intervals, and when connecting the barrier plate 3 in the horizontal direction, the vertical ribs positioned at both ends are provided. The ribs 31 may be overlapped with each other.
[0014]
And when assembling a foundation formwork using the dam plate 3 of the said structure, after fixing the angle-shaped lower positioning member 4 to the predetermined position of the discarded concrete G first, the vertical rib 31 of the dam plate 3 is made into the up-down direction. Is erected along the lower positioning member 4 in such a direction. Next, with the plate nut screwed to the end of the separator 5, the front end of the separator 5 is inserted from the back side of the barrier plate 3 into the round hole 33 at an appropriate position provided in the vertical rib 31, and then on the surface side. A long hole 16 of the concrete formwork butter material 1 is fitted to the protruding portion and fixed by appropriate tightening means 6 such as a nut. In this case, the separator 5 is arrange | positioned for every 5 rows of the vertical rib 31, and the pitch of the long hole 16 of the butter material 1 for concrete formwork is also adapted to it. Subsequently, the other end of the separator 5 is inserted into the round hole 33 of the return side weir plate 3 along the other lower positioning member 4, and the concrete formwork butter material 1 is similarly fastened. Fix with 6. Further, the upper positioning member 7 having a U-shaped cross section is placed on the upper portions of both dam plates 3 and screwed at the portion of the vertical ribs 31, and then adjustment is made for passage and installation. Thereby, the assembly of the basic formwork is completed. In addition, as shown in FIG. 4, the upper and lower concrete formwork butter materials 1 are separated from each other through the long holes 16 in the state where the cutout portions 15 a and 15 b are overlapped with each other in the center portion of the drawing. They are connected and integrated by tightening a nut 6 screwed to the end. In this case, as shown in FIGS. 1 and 2, notches 15a and 15b are formed in the side portions 12a and 12b at both ends of the concrete mold butter 1, and the side portions 12a and 12b are provided at the connecting portion. It does not overlap with the side surface parts 12a, 12b of the concrete formwork butter material 1. Therefore, the long holes 16 provided on the end portions of the respective bottom surface portions 11 can be easily overlapped, and the concrete mold butter material 1 can be connected in a straight line.
[0015]
As described above, the concrete formwork butter material 1 according to the present embodiment is provided with the step portions 14a and 14b formed on the side surface portions 12a and 12b and the back surface portion 17a that configures the groove portions 13a and 13b provided in parallel to the step portions 14a and 14b. , 17b and the like synergistically exert a reinforcing effect, so that the rigidity as a butterfly material is greatly improved. Incidentally, for example, when compared with a light C-section steel having a cross section with the same unit weight, about twice the cross-sectional performance is obtained, which greatly contributes not only to cost reduction but also to weight reduction of the butter material. Furthermore, since it can be stacked in a nested manner, it does not become bulky during transportation and storage, and the space between the side surface portions 12a and 12b is inclined so that the nut 6 for tightening can be easily attached.
[0016]
Next, FIG. 6 is another embodiment of the concrete form butter material according to the present invention, and is an enlarged perspective view of the end portion thereof. Note that a description of the same parts as those in the first embodiment is omitted. The concrete formwork butter material 8 shown in the figure is the same as the first embodiment in that it includes a bottom surface portion 81, a pair of side surface portions 82 a and 82 b, groove portions 83 a and 83 b, a long hole 84, and an end notch portion 85. However, there is a difference in that no step is provided on the pair of side surface portions 82a and 82b. In this case, if the cross-sections with the same unit weight are compared, the cross-sectional performance is inferior to that of the first embodiment, but the other effects are the same due to the presence of the grooves 83a and 83b.
[0017]
7 and 8 are a front view and a side view, respectively, of an auxiliary butter material used with the concrete formwork butter material according to the present invention. The auxiliary butterfly material 9 shown in the figure is a groove-like body composed of a bottom surface portion 91 and a pair of side surface portions 92a and 92b that are erected in a slightly inclined state on both side edges thereof. Further, similar to the concrete mold butter material 1 shown in the first embodiment, steps 93a and 93b are formed along the longitudinal direction at the intermediate portions of the side surface portions 92a and 92b, and a plurality of long portions are formed. Holes 94 are provided at predetermined intervals. This auxiliary butter material 9 is used by cutting to an appropriate length when the concrete formwork butter material set to the standard dimension is short at the end of the formwork, for example. . In this case, the width of the bottom face portion 91 is slightly narrower than the width of the bottom face portion 11 of the concrete mold butter 1, so that the bottom face portion 91 and the bottom face portion 11 are in contact with each other. It is set so that it can be fully fitted. Further, the interval between the long holes 94 is set to be narrower than the interval between the long holes 16 of the concrete formwork butter material 1. When the barrier plate 3 shown in FIG. 4 is targeted, the interval between the long holes 94 in the auxiliary butterfly material 9 is set to 1/5 of the interval between the long holes 16 in the concrete formwork butter material 1. That is, the interval between the long holes 94 corresponds to the pitch between the vertical ribs 31 of the barrier plate 3.
[0018]
FIG. 9 shows a state in which the formwork is assembled using the concrete formwork butter material 1 and the auxiliary butter material 9 in combination. In this case, the length of the concrete form butter 1 is insufficient for the two rows of the vertical ribs 31 of the barrier plate 3. Therefore, the auxiliary butter material 9 is cut to a length corresponding to three rows of the vertical ribs 31, and this is overlaid on the end portion of the concrete mold butter material 1 from above and penetrates the long holes 16 and 94. A nut 6 is screwed to the end of the separator to be fixed. Further, the other end side of the auxiliary butterfly material 9 is similarly fixed with the nut 6. In this way, it is possible to accurately cope with molds that do not fit in the standard dimensions.
[0019]
In addition, although the said Example demonstrated the case where it applied to a basic formwork, of course, it is not limited to this . Furthermore, various modifications within the technical concept of the present invention are possible, such as changing the shape of the groove in the side surface, omitting the notch portions or the side surface steps on both ends, and changing the material and application location of the dam plate to be applied. Of course, changes can be made.
[0020]
【The invention's effect】
As described above, the concrete formwork butter material according to the present invention is formed by forming each side edge side portion of the pair of side surface portions that are inclined outward in the opposed state into a groove shape continuing in the longitudinal direction. The rigidity as a material is improved, and even when stacked in a nested manner, the side surface portion is difficult to expand and deform. For this reason, the practical effect is extremely large, such as being not bulky in transportation and storage and capable of reducing the manufacturing cost.
[Brief description of the drawings]
FIG. 1 is a front view showing one embodiment of a concrete formwork butter according to the present invention.
2 is an enlarged perspective view of an end portion of the concrete formwork butter material shown in FIG. 1; FIG.
FIG. 3 is a side view showing a state in which the concrete formwork butter material shown in FIG. 1 is bound.
4 is a front view showing a usage state of the concrete formwork butter material shown in FIG. 1; FIG.
FIG. 5 is a cross-sectional view of FIG.
FIG. 6 is a perspective view showing another embodiment of the concrete formwork butter material according to the present invention.
FIG. 7 is a front view of an auxiliary butter material used in combination with a concrete formwork butter material according to the present invention.
FIG. 8 is a side view of FIG. 7;
FIG. 9 is a front view showing a usage state of a concrete formwork butterfly material and an auxiliary butterfly material.
FIG. 10 is a side view showing a stacked state of a conventional concrete formwork butter material.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1,8,10 ... Batter material for concrete formwork, 2 ... Bundling band, 3 ... Dam plate, 4 ... Lower positioning member, 5 ... Separator, 6 ... Nut, 7 ... Upper positioning member, 9 ... Auxiliary butter material, 11 , 81 ... bottom face, 12a, 12b, 82a, 82b ... side face, 13a, 13b, 83a, 83b ... groove, 14a, 14b ... step, 15a, 15b, 85 ... notch, 16, 94 ... insertion hole, 17a , 17b ... back portion, 33 ... round hole

Claims (3)

Provided with a bottom surface having separator insertion holes at predetermined intervals along the longitudinal direction and a pair of side surfaces disposed opposite to both side edges thereof, on a weir plate or vertical butter material constituting a concrete formwork contact with the bottom portion side those, received in the insertion hole of the end portion of the protruding separator, in concrete form for Bata member fixed by fastening means such as a nut between the side surface portion side, together with the side surface portion is inclined outwardly, respectively , have a step portion extending in the longitudinal direction in the middle portion, respectively, a concrete formwork for Bata material characterized by its side edge portions forms a groove folded outward. Provided with a bottom surface having separator insertion holes at predetermined intervals along the longitudinal direction and a pair of side surfaces disposed opposite to both side edges thereof, on a weir plate or vertical butter material constituting a concrete formwork In the concrete mold butter material that abuts the bottom surface side, accepts the protruding end of the separator into the insertion hole, and is fixed by tightening means such as a nut between the side surface portions, the side surface portions are inclined outward, The side edge side portion is folded outward to form a groove, and one end is cut out at a predetermined length on one end side, and the other end is cut off at a predetermined length on the other end side. Batter material for concrete formwork characterized by Provided with a bottom surface having separator insertion holes at predetermined intervals along the longitudinal direction and a pair of side surfaces disposed opposite to both side edges thereof, on a weir plate or vertical butter material constituting a concrete formwork In the concrete mold butter material that abuts the bottom surface side, accepts the protruding end of the separator into the insertion hole, and is fixed by tightening means such as a nut between the side surface portions, the side surface portions are inclined outward, A concrete formwork butter material characterized in that the side edge side portion is folded outward to form a groove portion and the back surface portion of the groove portion of the adjacent butter material can be locked in a stacked state .

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