JPH019225Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a fixing device for an upward facing box buried in a concrete panel. Large concrete panels used for the floors and walls of buildings are made of iron plates 11, as shown in Figure 1.
A formwork 12 is provided around the concrete 13, and concrete 13 is poured into the formwork and hardened. In this case, the electrical box 14 is buried in a predetermined designed position within the concrete panel.
This electrical box 14 is for storing electrical components such as indoor switches and outlets. By the way, as shown in FIG. 2, the electrical box 14 has a depth _M1 smaller than the panel thickness _M2 , so it cannot be placed in the exact position as designed from the time concrete is poured until it hardens. need to be retained. For this reason, conventionally, one piece of wood was placed between the formwork.
5 is installed and the electrical box 14 is tightened with a wire 16. However, in the above-described method of fixing the electrical box 14, there is a high probability that the electrical box 14 will be misaligned or misaligned until the concrete hardens, and there is a need for improvement in this respect. In particular, immediately after concrete is poured into the formwork, high-frequency vibrations are applied to the entire concrete in order to eliminate voids within the concrete.
At this time, a resonance phenomenon occurred in the rod 15, causing a large rattling of the electrical box, causing it to rise or shift. In addition, the position of the rail 15 itself may shift, and in this case, there is a drawback that all of the electrical boxes 14 attached to the rail 15 become displaced. As described above, according to the conventional fixing method, the stability regarding the vertical positioning and directional positioning of the electrical box is poor. This invention was devised in order to cope with the above-mentioned circumstances, and the object thereof is to provide a fixing device for an upward-facing box that allows accurate and stable positioning of the upward-facing box. Embodiments of this invention will be described in detail below with reference to the drawings. FIG. 3 shows an embodiment of this invention, in which reference numeral 14 is an electrical box, the opening of which is arranged upward. The side wall 14a of this electrical box 14,
14b can be provided with an opening by knocking out so that a conduit can be attached for wiring. Furthermore, the bottom wall 14c of this electrical box 14
A knock-out opening 21 is also formed approximately at the center of the hole. Using the opening 21 of the electrical box 14, a connector device 22 is attached to support the box. This connector device 22 is
For example, it consists of a cylindrical body 23 made of synthetic resin and a flanged screw 24 having a hollow space. A threaded groove is formed on the inner periphery of one end of the cylindrical body 23, into which the flanged screw 24 can be screwed. In this case, the flanged screw 24 is screwed into the cylindrical body 23 from inside the box through the opening 21, so that the rim of the opening is compressed by the flanged part and the end of the cylindrical body 23, and The connector device 22 will be integrated. Next, grooves 25 and 26 cut in the axial direction are formed on the lower end side of the cylindrical body 23 in order to determine the directionality of the box. The cylindrical main body 23 is coaxially attached to the cylindrical projection 28 of the fixture 27 . In this case, the cylindrical projection 28 of the fixture 27 is provided with a locking tool 29 that protrudes on one side or both sides in a direction perpendicular to the axis, and the grooves 25 and 26 are aligned with the locking tool 29. The locking tool 29, which is engaged with the electrical box to determine the planar direction of the electrical box, may be formed integrally with the cylindrical projection 28, but in the illustrated example, the locking tool 29 is formed integrally with the cylindrical projection 28. A penetrating iron core is used. This locking tool 29 may be provided upward from the fixing metal fitting 27 . The base of the fixture 27 has a flange shape with a trapezoidal longitudinal section, and a plurality of screw holes 27a, 27b are formed in this part. The fixing fitting 27 is fixed at a predetermined position on the iron plate 11, which serves as the bottom plate of the panel frame, by screws 31 and 32 passing through the screw holes 27a and 27b. Next, on the upper end side of the cylindrical projection 28 of the fixture 27 , a screw hole is coaxially formed into which a locking screw 33 is screwed. For example, the middle of a wire 34 is wound and locked around this locking screw 33, and this wire 34 is passed through the hollow of the connector device 22 into the inside of the box 14. Then, inside the box 14, it is wound around a rod-shaped stopper 35, for example. As a result, the box 14 is tightened toward the fixture 27 , thereby regulating the position of the electrical box in the height direction. FIG. 4 shows another embodiment of this invention, in which bolts 37 and nuts 38 are used as means for tightening and fixing the electrical box 14. In this case, screw holes are provided in the fixing fittings 27 and the iron plate 11, and the bolts 37 are screwed into these holes, thereby increasing the tightening reinforcing effect as a whole. Furthermore, by covering the electrical box 14 with a lid 40 and tightening the lid 40 together, it is possible to prevent concrete from flowing into the box when concrete is poured into the frame. There is an effect that can be done. Furthermore, the edge 40a of the lid 40 is
By bending it upward, the lid 40 does not get in the way when varnishing the upper surface of the concrete, and the concrete can be varnished neatly up to the upper edge of the box 14. Also, by applying a color that is easily noticeable, such as red or yellow, to the upper end surface of the bolt 37 or the nut 38, there will be no residue left behind when the bolt 37 is cut off after the concrete has hardened. Can be done. Next, in this device, the connector device 22
By simply attaching the electrical box 14 to the fixing bracket 27, the planar direction of the electrical box 14 is automatically adjusted to match the grooves 25, 2.
6 and the locking tool 29, but this is determined by making sure that the mounting state of the connector device 22 and the electrical box 14, and the mounting state of the fixture 27 and the iron plate 11 are in a fixed relationship in advance. This is due to what is prescribed. First, the iron plate 11 and the fixing metal fittings 27 are connected in advance to the fifth
Positioning is performed by the method shown in the figure. As shown in FIG. 5, marks 41a, 41b, and 41c are attached to the base of the fixture 27 so as to match the direction in which the locking tool 29 extends. On the other hand, reference marks 42, 43, and 44 are also provided on the iron plate 11 at predetermined design positions so as to coincide with the marks 41a, 41b, and 41c. Therefore, attach the fixing fitting 27 to the iron plate 11 with the screw 3.
1, 32, mark 41a,
If 41b and 41c are attached in alignment with the reference marks 42, 43, and 44, they can always be attached in a constant relationship. Moreover, the screws 31 and 32 easily fit into the screw holes of the iron plate 11, so that the installation work can be carried out smoothly. Next, the orientation of the electrical box 14 and the directional relationship between the grooves 25 and 26 of the connector device 22 are set as follows. The connector body 28 has a flanged screw 24
At the same time, the area around the opening 21 of the electrical box 14 is tightened.
A metal fitting 45 exactly similar to the above is prepared. That is, as shown in FIG. 6, the same conditions as those used when attaching to the fixture 27 are set, and the electrical box 14 is set in a predetermined relationship with the fixture 45. This is to keep the positioning tool 46 in contact with it. In this state, if the flanged screw 24 is tightened by the tightening device 47, the connector device 2
2 and the electrical box 14 are always integrated in a predetermined direction. As a result, the directions of the grooves 25 and 26 of the electrical box 14 and the connector device 22 are always in a constant relationship. Therefore, this combination can be used as the third
If it is attached to the fixing metal fitting 27 as shown in FIGS. 5 and 5, the box can be attached in an accurate direction automatically. [Effects of the invention] The fixing device for the upward facing box according to this invention is
It is effective for accurately positioning and burying electrical boxes in a predetermined design position in a concrete panel in a multidimensional manner. First, in order to position the electrical box 14 in the height direction, a connector device 22 and a fixture 27 are used instead of simply hanging it as in the conventional case. Therefore, in the height direction, the connector device 2
It is regulated by the axial length of the second cylindrical body 23. Moreover, in this case, as a means for tightening the electrical box 14 downward, a tightening means using a wire 34 or a bolt 37 and a nut 38 is adopted. Particularly in this case, what should be noted is that the tightening means is interposed between the fixing fitting 27 and the inside of the electrical box through the hollow space of the connector device 22 . As a result, the heightwise position of each electrical box can be accurately determined and firmly maintained. That is, the ups and downs of the electrical box 14 are determined by adjusting the length of the cylindrical body 23 of the connector device 22 . In this way, the electrical box 14 is accurately and stably held in its vertical height position. On the other hand, when the concrete panel is lifted by a hoist after concrete is poured into the formwork, the wire 34 is easily cut from the inside of the electrical box by the force generated during demolding. Furthermore, by removing the bolts 37, the concrete panel can be easily attached to the steel plate with the box and connector device buried.
It can be separated from 1. Next, the positioning effect regarding the planar direction of the electrical box will be explained. In the case of the present invention, there are the following three factors that influence the planar positioning of the electrical box. a The installation orientation between the grooves 25 and 26 of the connector device 22 and the opening of the electrical box. b Directional relationship between the grooves 25 and 26 of the connector device 21 and the locking tool 29 of the fixing metal fitting 27 . c Direction of locking tool 29 of fixing metal fitting 27 and iron plate 1
Installation status with 1. It is. Regarding the above items a and c, the fixing bracket 27 is fixed in advance by the means explained in FIGS. 5 and 6.
The direction of the grooves 25 and 26 of the connector 22 and the direction of the box are made to be the same. As a result, item b is automatically resolved, and the electrical box 14 and connector device 2 are placed in the panel frame.
2, the direction of the box will be exactly in the predetermined direction.

[Brief explanation of the drawing]

Figures 1 and 2 are perspective views to explain the conventional temporary fixing method for electrical boxes used in the manufacture of concrete panels, and Figures 3a and 3b illustrate an embodiment of this invention. FIG. 4 is a sectional view showing another embodiment of the invention; FIG. 5 is a plan view showing how to attach the fixture; FIG. The figure is a perspective view shown to explain a method of attaching an electrical box and a connector device according to the invention. 11... Iron plate, 14... Electrical box, 22
... Connector device, 25, 26 ... Groove, 27 ...
Fixing metal fitting, 28... Cylindrical projection, 29... Locking tool, 34... Wire, 35... Stopper, 37... Bolt.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A disc-shaped base is fixed by screws or welding to the iron plate serving as the bottom plate of the concrete panel frame, and a cylindrical projection is formed protruding from the upper surface of this base, and the axis of this projection is is a fixing metal fitting in which a locking part is formed to protrude in orthogonal directions, and the protrusion is inserted into a hollow on one end side, and the locking part is inserted into a groove formed in a cutout of the cylindrical part. The other end is engaged with the cylindrical main body that supports the periphery of the opening in the approximate center of the bottom wall of the electrical box, and the other end is inserted through the opening into the cylindrical main body. a connector device consisting of a hollow flanged screw that is tightened from the inside of the electrical box, one end of which is engaged with a protrusion of the fixing fitting, and the other end of which is inserted into the electrical box through the hollow of the connector device; 1. A fixing device for an upward-facing box, characterized in that it comprises a tightening means that is guided and tightens between the electrical box and the fixing fitting. (2) As the tightening means, a wire having one end secured to the tip of the protrusion is used, and the other end of the wire is wound around a bar inside the electrical box and tightened. A fixing device for an upward facing box according to claim 1 of the utility model registration claim, characterized in that: (3) As the tightening means, a bolt that is screwed into the protrusion is used, and when the electrical box is tightened to the fixing fitting, the electrical box is locked to the electrical box by being tightened by the bolt. A fixing device for an upward box according to claim 1, characterized in that a nut is used. (4) As the tightening means, a bolt passes through the fixing metal fitting and is screwed to the iron plate, and the bolt passes through a hole in the approximate center of the lid that closes the electrical box, and the protruding end thereof A fixing device for an upwardly facing box according to claim 1, characterized in that a nut is tightened at the same time.