JP6278937B2 - Round boxing fixing device - Google Patents

Description

  [Technical Field] The present invention relates to a fixing device for a circular box opening having an opening surface on the upper surface of a reinforced concrete foundation constructed on a base, and a base structure related to the fixing device.

  As a circular box opening member, a so-called winding pipe in which a ribbon-like thin steel plate is formed in a spiral shape is known. For example, Patent Document 1 shows the structure of a boxing winding pipe.

  In addition, as a method of fixing the box forming formwork to the concrete formwork rather than fixing it to the reinforcing bars in the formwork, the upper end of the concrete formwork on both sides is bridged and fixed by nailing or the like 2 Patent Document 2 discloses a technique in which a mounting base is attached to a piece of pier, and a box form is fixed between a hook-shaped holding member and a fastening member fixed to the mounting base. Yes.

JP-A-10-159228 JP-A-7-247683

Conventionally, there have been the following problems in unboxing when installing concrete.
(A) The box is usually fixed to a reinforcing bar, but it is difficult to ensure the accuracy of the installation position because the reinforcing bar moves due to vibrations from the vibrator.
B) Box opening has an open surface at the top and a closed bottom, and when the concrete is placed, it is lifted by the buoyancy of the concrete, so it is difficult to ensure the installation position accuracy.

C) When there are a small number of anchors to fix the equipment, there are few problems. However, when there are many anchors, all the anchors cannot be inserted unless the circular boxing that fits all the anchors is within a certain tolerance. There is a possibility.
D) If it is required to pull out the box after the concrete is hardened by design, use a ribbon-shaped thin steel plate spirally shaped like a winding pipe as a circular box, and fix this to the reinforcing bars Adhere and fix to concrete. However, since the wire fixing is loose, the fixing position during concrete pouring is likely to shift and the position accuracy is poor. On the other hand, with welding fixing, which can be fixed more firmly, it cannot be drawn out and removed into a ribbon shape after the concrete has hardened. In short, it was difficult to pull out and remove in a ribbon shape and firmly fix it.

  Further, the technique described in Patent Document 2 does not require a welding operation, but does not have an installation position adjustment function in the horizontal direction (XY direction) of the boxing mold. With respect to the problem that the frame cannot be set while adjusting the frame to a predetermined horizontal position, and the positioning in the height direction (Z direction), the operator holds the boxing formwork by hand to the predetermined height. There was a problem that the fastening member had to be fastened and fixed at the position. Moreover, in the first place, if there is no form on both sides, it cannot be fixed and can only deal with such a basic shape.

  A fixing device for circular box opening according to the present invention includes a circular box opening, a concrete plate for fixing the circular box opening, and at least a pair of fixing plates fixed to both ends of the concrete plate. It has a hole for use, and the circular box opener is characterized in that its lower end portion stands upright on the upper surface of the concrete plate by adhering and fixing.

According to the present invention, the following remarkable effects can be achieved.
a At the production stage, the round box is fixed to the concrete plate with high accuracy (relative to the design, that is, strictly in the size and shape as a fixing device). The fixing plate is nut-fixed to the screw rod of the hole for fixing the base with high precision (absolutely designed position, that is, strictly in terms of size and shape as a work). Thereby, compared with the case where a circular box opener is individually fixed by a reinforcing bar in the field, a construction period can be shortened and accuracy can be improved. Moreover, the damage at the time of transportation and installation fixing can be reduced.
b. After surveying and marking on the base, driving the screw rod, roughly determining the plane position, leveling, installing the lower nut on the screw rod, determining the level position with high accuracy, and fixing the base plate The fixing hole is passed through the screw rod. After that, with the upper nut in a semi-fixed state, the plane position of the entire fixing plate is determined with high accuracy by total station survey, and the upper nut is fastened and anchored. Thus, there is no waste in a series of surveying and installation work, and the fixing device can be installed efficiently and accurately.
c At the time of placing concrete on a reinforced concrete foundation, the circular box is not anchored to the base by a screw plate and an upper nut through a concrete plate and fixed by a fixed plate.
d If a ribbon-shaped thin steel plate formed into a spiral shape is used as a round box, welding is not necessary because the root is firmly attached and fixed to the concrete plate. Moreover, even if it is a case where removal | removal is required from a reinforced concrete foundation, it can be pulled out and removed in a ribbon shape after concrete is hardened.
e Since the circular box is not fixed from the molds on both sides of the reinforced concrete foundation, it can be reliably fixed without being restricted by this positional relationship.

FIG. 1 is a three-view diagram (plan view, front view, and side view) showing Type 1 in the structure of the fixing device for removing a circular box according to the first embodiment. FIG. 2 is a three-view drawing (plan view, front view, and side view) showing Type 2 in the structure of the fixing device for removing a circular box according to the first embodiment. FIG. 3 is a diagram showing a first step (a drilling with a guide frame as a guide) of the fixing method of the fixing device. FIG. 4 is a diagram showing a second step (base anchor placing) of the fixing method of the fixing device. FIG. 5 is a diagram illustrating a third step (mortar construction) of the fixing method of the fixing device. FIG. 6 is a diagram illustrating a fourth step (fixing device installation) of the fixing device fixing method. FIG. 7 is a diagram illustrating a fifth step (positioning and fixing of the fixing device) of the fixing method of the fixing device. FIG. 8 is a diagram showing a sixth step (construction of reinforced concrete foundation) of the fixing device fixing method. FIG. 9 is a diagram showing removal of a circular box (removal of a spiral ribbon-like thin steel plate). FIG. 10 is a diagram showing installation of equipment (insertion and positioning of equipment fixing anchors). FIG. 11 is a diagram showing fixing of equipment (mortar filling of a circular box-extracted portion). FIG. 12 is a diagram illustrating the completion of fixing the equipment (attachment removal). FIG. 13 is a diagram illustrating a configuration of a fixing device for removing a circular box according to the second embodiment, corresponding to a case where the base has an inclination.

DESCRIPTION OF EMBODIMENTS Preferred embodiments of a fixing device and a fixing method for removing a circular box according to the present invention will be described below with reference to the drawings.
In addition, the fixing device for circular box opening described below includes a plurality of circular box opening for fixing a facility having a plurality of anchors on the upper surface of a reinforced concrete foundation constructed on an existing base (for example, floor slab). The description will be made on the premise of the fixed form.

  1 and 2 are three views showing the structure of a fixing device 1 for a circular box punch 2 according to a first embodiment of the present invention, and are a plan view, a front view, and a side view from above. FIG. 1 shows a type 1 structure of the first embodiment, and FIG. 2 shows a type 2 structure of the first embodiment. Both are composed of a concrete plate 3 for fixing the lower end portion of the circular box opener 2, a holding member 4 for holding the circular box opener 2, and a fixing plate 5 provided with a base fixing hole 7 for fixing on the base.

Next, the above constituent elements will be described in order with reference to FIGS.
(1) Concrete board 3
On the upper surface of the concrete plate 3, the lower end portions of the circular box remover 2 and the holding material 4 are adhered and fixed, and these are integrated with each other. In Example 1, the concrete board 3 is comprised with the member of the precast concrete (PC) property.

On the upper surface of the concrete plate 3, the circular box opener 2 is erected upward and upright in a state where the circular box opening 2 is correctly arranged and fixed at a relative position in design. Further, a fixing plate 5 described later is integrally fixed to the concrete plate 3. The base fixing holes 7 provided in the fixing plate 5 are provided at positions outside the outer edge of the concrete plate 3.
In addition, the concrete board 3 may include a grid-like reinforcing bar. Thereby, rigidity can increase and it can make it hard to break.
The above structure is common to both types 1 and 2.

(2) Fixing plate 5
There are two types of fixing plate 5.
In FIG. 1, a type 1 fixing plate 5 is shown. In Type 1, two angle members 5a each having a bottom surface and side surfaces are used in pairs (hereinafter referred to as “a pair”). The pair of angle members 5a are arranged with the side surfaces facing each other inward, and are arranged on the outer edge of the fixing device (outside the outer edge of the concrete plate 3). A base fixing hole 7 is provided on the bottom surface of each angle member 5a, and is fixed to the base with a nut by a screw rod 8 (see FIGS. 4 and 7, etc.) which is an anchor having a screw. And the hole provided in the side surface of a pair of angle material 5a is nut-fixed with the steel rod 6 which has a screw | thread. Thereby, the fixing plate 5 made of the pair of angle members 5a is integrated and fixed to the concrete plate 3. Further, the steel bar 6 has an effect of positioning and restraining the lower end portion of the circular box opener 2.

FIG. 2 shows a type 2 fixing plate 5. In type 2, a pair of strip-shaped iron plates 5b is used. Each of the pair of iron plates 5b includes a base fixing hole 7, and is fixed to the base with a screw rod 8 (illustrated in FIGS. 4 and 7, etc.) that is an anchor having a screw. Further, the pair of iron plates 5b are arranged in parallel on the bottom surface of the outer edge of the fixing device 1, and a steel material 6 such as another strip-shaped iron plate is welded so as to be orthogonal to the upper surfaces of the pair of iron plates 5b. It is integrally fixed with 5b.
Furthermore, if a nut is previously welded to the holding member 4 of the iron plate 5b, the holding member 4 can be easily erected at a predetermined position.

  In addition, although Example 1 showed the case where an angle material or a strip | belt-shaped iron plate was used as the fixed plate 5, as a material, it is not restricted to a metal material, It may replace with a resin material. Further, the fixing plate 5 is arranged as a pair of structures on the outer side of the outer edge portion of the concrete plate 3 to form the outer edge portion of the fixing device 1, but two pairs (four pieces) are arranged corresponding to the four corners of the outer edge of the fixing device 1. May be. Further, even when the fixed plate 5 is an angle member, as in the case of the type 2, a pair of angle members are installed by welding or the like by installing a steel material such as a strip-shaped iron plate in a direction orthogonal to the pair of angle members 5a. It may be fixedly connected to 5a.

(3) Circular box opening 2
The circular box opener 2 stands upright with its lower end (base) attached and fixed to the concrete plate 3. Further, the circular box opener 2 is fixed and held by a vertical holding member 4 whose lower end (base) is attached and fixed to the concrete plate 3 and a horizontal holding member 4 that intersects and is fixed horizontally. Thus, the holding member 4 ensures the relative position of the circular box opener 2 during transportation and installation, and can prevent damage and the like.
The above structure is common to both types 1 and 2.

(4) Holding material 4
There are two types of holding material 4.
In FIG. 1, a type 1 holding material 4 is shown. Type 1 includes a vertical holding member 4a made of a steel rod having screws and a horizontal holding member 4b made of a plate.
The vertical holding member 4a is fixed to the steel bar 6 with a wire or the like, and its lower part is fixed to the concrete plate 3 and is erected, penetrates the horizontal holding member 4b, and the vertical holding member 4a is fixed to the nut at the penetration portion. .

On the other hand, the horizontal holding member 4 b has a circular defect portion that matches the arrangement shape of the circular box punches 2, and can thereby be brought into close contact with the side surfaces of the circular box punchers 2. Further, the horizontal holding member 4b is provided with a hole through which the vertical holding member 4a passes, and is fixed to the concrete plate 3 via the vertical holding member 4a. As described above, the circular box opener 2 is fixed to the circular defective portion of the horizontal holding member 4b with an insulation lock or the like, and is sufficiently firmly fixed to the concrete plate 3.
That is, the circular box opener 2 is constrained by a wire rod fixing or the like by the steel rod 6 connecting the fixing plate 5 at the lower end portion thereof, and fixed at the upper portion by the circular defect portion of the horizontal holding member 4b. The overall position is determined at the location.

  In FIG. 2, a type 2 holding material 4 is shown. Type 2 includes a vertical holding member 4c and a horizontal holding member 4c made of steel bars. The vertical holding member 4c is vertically installed with its lower part attached and fixed to the concrete plate 3. On the other hand, the horizontal holding member 4c fixes the number of circular box punches 2 along the arrangement shape.

The above two types have the following advantages and disadvantages.
Regarding the holding material 4 of type 1, there is no problem of corrosion because the vertical holding material 4a is a steel material even if embedded in the reinforced concrete foundation. On the other hand, the horizontal holding member 4b is not able to do this because it is a plate member. Moreover, if a target is stuck, it becomes possible to carry out survey management of the whole position at any time by a total station.

  On the other hand, regarding the type 2 holding material 4, since the vertical holding material 4c and the horizontal holding material 4c are both steel materials, they may be embedded in the reinforced concrete foundation as they are. On the other hand, because the number wire is fixed, there is a problem in terms of accuracy due to looseness, and it is also difficult to carry out survey management at any time from the total station.

  However, the vertical holding members 4a and 4c and the horizontal holding members 4b and 4c are not essential components for fixing the circular box punching. For example, when the height of the circular boxer is low, the lower end part (root) of the circular boxer 2 is fixed to the concrete plate 3 so that the entire circular boxer can be sufficiently fixed and held. It is not necessary to use the holding material 4.

  With the above configuration, the fixing plate 5 having the circular box remover 2, the vertical holding material 4a or 4c, and the base fixing hole 7 can be integrated through the concrete plate 3 at the manufacturing stage. Therefore, the relative positional accuracy of the plurality of circular box openers 2 can be ensured at the manufacturing stage.

  Moreover, although two types were demonstrated above, the fixing device of the circular box opening which concerns on this invention is not limited to said type, Various modifications are included. The above types are for explaining the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described. Moreover, it is also possible to add, delete, and replace other types of a part of each type of configuration.

  Furthermore, the circular box opener 2 can be fixed without welding. For example, if a ribbon-shaped thin steel plate formed into a spiral shape (winding pipe) is used as this circular box opener, it becomes a ribbon shape after the concrete is hardened. Can be pulled out and removed.

Next, the fixing method of the fixing device 1 will be described in the order of the work.
FIG. 3 is a diagram showing a first step (a drilling with a guide frame as a guide) of the fixing method of the fixing device.
In the first step, the surface position is marked on the base, and a hole is drilled using the guide frame as a guide to form a hole for the screw rod 8 to be driven in the next second step. As described above, since the guide frame is used as a guide, the hole-drilling hole on the base can be drilled with high accuracy and efficiency.

FIG. 4 is a diagram showing a second step (base anchor placing) of the fixing method of the fixing device.
The screw rod 8 is driven into the hole formed on the base, and the lower nut is adjusted to a predetermined level. Here, for fixing the screw rod 8 to the base, a wedge anchor method or a resin fixing anchor method may be used. In short, the fixing structure is not limited as long as it can withstand the buoyancy at the time of concrete placement of the reinforced concrete foundation constructed on the base.

FIG. 5 is a diagram illustrating a third step (mortar construction) of the fixing method of the fixing device.
Before installing the concrete plate 3, a predetermined amount of mortar is placed. This predetermined amount is an amount corresponding to the space below the concrete plate 3 when it is installed.
About this mortar construction, rather than filling the mortar at the time of installation of the fixing device 1, it is more reliable to fill the mortar before the installation and press the concrete plate 3 of the fixing device 1 against the mounted mortar. It can be performed simply.

FIG. 6 is a diagram illustrating a fourth step (fixing device installation) of the fixing device fixing method.
For example, a screw rod 8 fixed in the second step is passed through a base fixing hole 7 provided in the fixing plate 5 on the lower surface of the fixing device 1 with respect to the base such as a floor slab. Then, the concrete plate 3 and the fixing plate 5 are pushed in while the mortar previously placed is pushed in until the fixing plate 5 in which the base fixing holes 7 are formed comes into contact with the lower nut and does not move.

FIG. 7 is a diagram illustrating a fifth step (positioning and fixing of the fixing device) of the fixing method of the fixing device.
A cap with a light wave target is fitted on the upper end of the fixing device 1 so that the three-dimensional position can be confirmed using a light wave distance measuring instrument (not shown). After confirming the three-dimensional position using this light wave target, the upper nut 9 is screwed into the screw rod 8 passed through the base fixing hole 7 to fix the position of the fixing device 1. Although this description is based on type 2, in the case of type 1, if the light wave target is attached to the horizontal holding member 4, the same effect can be obtained.

FIG. 8 is a diagram showing a sixth step (construction of reinforced concrete foundation) of the fixing device fixing method.
Reinforcement and formwork are assembled on the base to construct a reinforced concrete foundation. At this time, the fixing plate 5 having the base fixing hole 7 is fixed to the screw rod 8 anchored to the base by the upper nut 9, and the lower surface of the concrete plate 3 is in close contact with the base by the mortar. The fixing device 1 does not move due to lifting or vibration caused by the buoyancy of concrete.
Further, since a cap with a light wave target is fitted in the fixing device 1, the position can be confirmed at any time, so that even if a misalignment due to an unexpected impact occurs, this can be confirmed and corrected. .

Next, removal of the circular box after fixing the fixing device, setting of the equipment, and fixing will be described.
FIG. 9 is a view showing removal of a circular box (removal of a spiral ribbon-like thin steel plate) subsequent to fixing of the fixing device.
If it is necessary to remove the circular box by design, if a ribbon-shaped thin steel plate (winding pipe) formed as a circular box is used as a circular box, it can be drawn into the ribbon-shaped thin steel plate after the concrete has hardened. Can be removed, round box opener.

  By removing this circular box, the foundation structure embedded in the reinforced concrete foundation is at least a screw rod (including upper and lower nuts) driven into the foundation, and a mortar layer provided on the foundation including the screw rod. A pair of fixing plates provided on the mortar layer and fixed to the mortar layer by the screw rods, and a concrete plate fixed with the pair of fixing plates at both ends remain. Here, since the vertical holding member or the horizontal holding member is not an essential constituent element as described above, whether or not it remains as a base structure is determined depending on whether or not it is used.

FIG. 10 is a diagram showing installation of equipment (insertion and positioning of equipment fixing anchors).
An equipment fixing anchor is inserted into a circular box-extracted portion on the upper surface of the reinforced concrete foundation, and equipment (in FIG. 10 and subsequent figures, “pillar” is assumed as equipment) is installed at a predetermined position. At this time, an angle or the like for height adjustment is arranged on the outer periphery of the lower part of the equipment, and after adjusting the jack, positioning is performed by using a spacer or the like. Thereby, the installation accuracy of equipment can be ensured and the installation efficiency can be increased.

FIG. 11 is a diagram showing fixing of equipment (mortar filling of a circular box-extracted portion).
Fix the equipment by filling the mortar in the circular boxed place where the equipment fixing anchor is inserted. As an example of the mortar filling method, the mortar filling hose is filled with the mortar filling hose while closing the gap between the height adjustment angle of the outer periphery of the lower part of the equipment and the upper surface of the reinforced concrete foundation with a timber etc. To do.

FIG. 12 is a diagram illustrating the completion of fixing the equipment (attachment removal).
When the mortar has solidified and it has been confirmed that the fixed anchor of the equipment has been fixed, the pier provided between the height adjustment angle on the outer periphery of the lower part of the equipment and the upper surface of the reinforced concrete foundation is removed. Thereby, the fixing of the equipment is completed.
According to the above installation method, there is no waste in a series of surveying and installation work, and the fixing device can be installed efficiently and accurately.

Example 2 is a fixing device for unboxing a circular box, which is adapted when the base is not horizontal but has an inclination (gradient).
FIG. 13 shows a correspondence example when the base has an inclination. The configuration of the fixing device for circular box opening according to Example 2 is shown as “oblique type” in the center of the figure, and for comparison, the type of Example 1 (for the height of circular box opening 2) It is a figure which shows the "short type" on the left side of a figure, and the "long type" on the right side of a figure by difference.

In the second embodiment, even when the base has an inclination, the circular box opener 2 is integrated and fixed in order to erect the circular box opener 2 (keep the upper surface of the circular box opener 2 horizontal). The concrete plate 3 is configured to have an angle (shape) according to the inclination of the base. In addition, the holding material 4 is also assembled in accordance with the shape of the circular box opener 2, and the circular box opener is fixedly held.
As described above, according to the second embodiment, it is possible to provide the fixing device 1 that erects the circular box opener 2 (keeps the upper surface of the circular box opener 2 horizontal) even when the base is inclined. It is.

  In contrast to the case where the substrate is not horizontal but the circular box opener is upright as shown in the second embodiment, when the base is horizontal but the upper structure is inclined, a horizontal concrete plate is used. On the other hand, it is also possible to fix the circular box opener with an inclination.

DESCRIPTION OF SYMBOLS 1 Fixing device 2 Round box extraction 3 Concrete board 4 Holding material (4a Type 1 vertical holding material, 4b Type 1 horizontal holding material,
4c Type 2 vertical holding material and horizontal holding material)
5 fixed plate (5a angle material, 5b iron plate)
6 Steel bar or steel material 7 Base fixing hole 8 Screw bar 9 Upper nut

Claims (7)

With a round box,
A concrete plate for fixing the circular box opener;
Comprising at least a pair of fixing plates fixed to both ends of the concrete plate,
The fixing plate has a base fixing hole,
The circular box opening fixing device is characterized in that a lower end portion of the circular box opening stands upright on the upper surface of the concrete plate by adhering and fixing. A fixing device for removing a circular box according to claim 1,
A vertical holding material and a horizontal holding material for fixing the circular box opener are provided,
The vertical holding member is a fixing device for removing a circular box, wherein a lower end portion of the vertical holding member stands upright on the upper surface of the concrete plate by adhering and fixing. A fixing device for removing a circular box according to claim 1 or 2,
The at least one pair of fixing plates is made of an angle material having a bottom surface and a side surface,
A fixing device for removing a circular box, comprising a member for connecting the angle members to each other and fixing the angle members together to the concrete plate. A fixing device for removing a circular box according to claim 1 or 2,
The at least one pair of fixing plates is composed of a strip-shaped iron plate,
A fixing device for unboxing a circular box, comprising a member for connecting the steel plates to each other and fixing them to the concrete plate. A fixing device for removing a circular box according to any one of claims 3 and 4, which refers to claim 2 or claim 2,
The horizontal holding member is a plate member having a circular defect portion matched with the circular box opening arrangement shape and a plate member having a hole through which the vertical holding member passes. A fixing device for removing a circular box according to any one of claims 3 and 4, which refers to claim 2 or claim 2,
The horizontal holding member is made of a steel bar and has a wire for fixing the circular boxer. A fixing device for removing a circular box according to any one of claims 1 to 6,
The circular box opener is a structure in which a ribbon-like thin steel plate is formed in a spiral shape.

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