JPH019224Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a temporary support metal fitting for buried wiring boxes, which can be used to bury and fix various types of wiring boxes in a concrete structure by directly burying highly flexible cables or flexible conduits. An embedded wiring box that allows the connected wiring box to be temporarily supported on a reinforcing steel member without wobbling or rattling, and also to securely support the connected wiring box in contact with the temporary concrete frame surface. Regarding temporary support fittings.

Conventionally, various types of wiring boxes, such as outlet boxes, switch boxes, and outlet boxes, which are buried and fixed in concrete structures, can be made freestanding by the conduit, etc., if the conduit, etc. connected to it is rigid. There were no problems with its positioning. However, in recent years, direct buried cables have been increasingly used to improve the service life of buildings and the durability of wire materials, and flexible conduits that allow for positioning adjustment have become common. It is virtually impossible for the concrete to stand on its own for positioning, and as a result, it shakes or wobbles and becomes a hindrance to various work until it is installed on the temporary concrete frame to be erected, making it difficult to improve work efficiency. This was also one of the factors that hindered this goal.

Therefore, this idea was devised in view of the above points, and near both longitudinal ends of a roughly rectangular main plate made of a highly elastic material such as spring steel,
A mounting part having an inner circumferential edge surface into which a reinforcing bar member is inserted when the main plate is bent against the elasticity of the main plate, and is pressed against the reinforcing bar member by the elastic return force generated when the main plate attempts to return to its original state. A support with a metal fitting main body provided with a metal frame, and a wiring box buried in the concrete frame supported by its bottom wall and attached to the metal main body, and a screw hole into which a fixing bolt inserted through the temporary concrete frame is screwed. By using the reinforcing steel members arranged in the concrete frame, it can be temporarily supported and securely fixed until the temporary concrete frame is erected, and it can also be used to securely secure the temporary concrete frame to the frame. This is designed to improve workability during installation.

Hereinafter, embodiments of this invention will be described with reference to the drawings.

Reference numeral 1 shown in the figure is a metal fitting mainly obtained from a substantially rectangular main plate 2 made of a material such as a highly elastic sheet material such as spring steel. In the vicinity of both longitudinal ends, when the main plate 2 is bent against the elasticity of the main plate 2, reinforcing steel members S having an appropriate diameter and embedded in the concrete frame C are inserted,
A mounting portion 3 is provided having an inner circumferential edge surface 3A that presses against the reinforcing bar member S by an elastic return force generated when the main plate 2 attempts to return to its original state.

When viewed from the side, the main body 1 of the metal fitting 1 is not limited to the case where the central part is flat and the entire body has an arcuate shape as shown in FIGS. 1 to 5 and 8. 10 and 20, the side surface may have a substantially doglegged shape, or the central portion may be curved and the entire body may be biased into a flattened position as shown in FIGS. 6 and 7. In any case, the shape may be arbitrary as long as it has a bending elasticity that bends when pressed from both ends in opposing directions and returns to its original state when the pressing force is released.

In addition, the main body 1 of the metal fitting shown in the figure is provided with beads 5 at the bending parts between the center and both wing parts, the wing parts themselves, etc., as a reinforcing means to increase the distortion resistance against the applied pressing force. Further, on both end edges of the main plate 2, knob operation pieces 6 are formed which are bent in accordance with the direction of the pressing force applied to both wing portions.

The attachment part 3 is communicated with the outside through notches formed from the side edges near both ends of the main plate 2 so that it can be directly attached to a predetermined position of the reinforcing steel member S. It can be directly attached to a predetermined support position of the reinforcing steel member S. Of course, in order to be attached to the reinforcing bar member S in advance, the hole may be formed with a size sufficient for the reinforcing bar member S to be inserted therethrough.In this case, once the reinforcing bar member S is temporarily supported, There is no slight movement or detachment due to impact, vibration, etc., and the temporary fixing stability can be further improved. In addition, as shown in the figure, if the attachment parts 3 are arranged with different sizes or with different distances from the center of the main plate 2, they can be selectively attached to reinforcing steel members S with different diameters, and the metal fittings This allows use within the range of action of the elastic restoring force of the main body 1 itself.

And, approximately in the center of the metal fitting main body 1, there is an outlet box buried in the concrete frame C,
Supports 10 and 20, which support various wiring boxes B such as switch boxes and outlet boxes, at their bottom walls 30 are connected to each other.

The support 10 in the first embodiment shown in FIGS.
Then, the connecting board 14 with the screw holes 13 drilled therein is joined, and the pair of connecting claw pieces 15 set up on the base 12 are inserted into the center of the main body 1 of the metal fitting 1, and the bottom wall 30 of the wiring box B is attached. It is designed to be engaged and bent from the outside. Although the support body 10 in the illustration has a disk shape, it is needless to say that the shape is not limited to this.
This is accomplished by fitting a joining protrusion 16 protruding from the base plate 12 into a joining hole 17 drilled in the base plate 12, and crushing the joining protrusion 16. The connection of the support body 10 to the metal fitting main body 1 according to this embodiment is achieved by inserting the connecting claw pieces 15 into a pair of small coupling holes 7 bored at both ends of the central portion of the metal fitting main body 1, and inserting the connecting claw pieces 15 into the bottom of the metal fitting main body 1 as they are. wall 30
It is intended to be integrated with the wiring box B by inserting it into a small through hole 31 drilled in the middle and bending it into engagement.

In the second embodiment shown in FIG. 5, the supporting body 10 and the metal fitting main body 1 in the first embodiment are connected in advance, and the central part of the metal fitting main body 1 is The L-shaped mounting claw piece 8 is erected by U-shaped notches formed at both ends, and the hole obtained after the erection is used for the insertion of the connecting claw piece 15.

The support body 10 in the third embodiment shown in FIGS. 6 and 7 has the same structure as that in the first embodiment, and the center part of the metal fitting main body 1 is curved in connection with the metal fitting main body 1. Then, due to the elastic restoring force of the curved center part itself, it is held between a pair of L-shaped mounting claws 8 that are opposed to each other on the outside of the curved surface of the center part. be. That is, by applying a pressing force that causes the curved surface in the center to be further curved, the mounting claw pieces 8 are separated and expanded, and in this state, the support body 10 is placed between the mounting claw pieces 8. After that, when the pressing force is released, the mounting claw pieces 8 are held between each other by the resilient restoring force of the curved central portion which returns to its original state. At this time, it is sufficient that the main body 1 of the metal fitting 1 is curved at its center, and both wing portions may be located in the same straight line.Also, as shown in FIG. By taking on a straight line shape, both wing portions face each other in an inclined state so as to be close to each other. Therefore, according to this, the support body 10 can be joined with one touch by applying a pressing bending force to the metal fitting main body 1 to make it fold into a two-fold shape and releasing the force, and furthermore,
A stable bond that does not easily separate can be obtained.

In this way, the supports 10 in the first to third embodiments are all designed so that the center part of the metal fitting main body 1 is brought into contact with the outer surface of the bottom wall 30 of the wiring box B, and as will be described later, the support body 10 is made of concrete. Frame P
When the wiring box B is pulled by the fixing bolt 35 inserted into the wiring box B, the wiring box B is not separated from the wiring box 35, and the stable contact state of the wiring box B can be maintained.

The support body 20 in the fourth embodiment shown in FIG. It is formed into a cross-sectional groove shape from the drilled back wall 23, and the connecting machine screw 24 inserted through the back wall 23 and the bottom wall 30 is screwed into the center of the metal fitting main body 1. It is. That is, the metal fitting main body 1 disposed on the outside of the bottom wall 30
The bottom wall 30 is held between the support body 20 disposed on the inner side, and the through hole 25 and the bottom wall 30 are opened in the back wall 23.
The whole 1, 20, B is integrated by screwing both 1, 20 together with a connecting small screw 24 inserted into the small through hole 31 of. Therefore, since they are connected by screwing means, both the attachment to the reinforcing steel member S and the abutting fixation to the concrete temporary frame P by the fixing bolts 35 are extremely stable, and the fixing bolts 35 are not screwed. They are not separated by the sticking action.

Next, to explain the use of this devised support fitting,
The metal fitting main body 1 and the support body 10 or 20 are installed and set in the wiring box B to which wiring materials W such as directly buried cables and flexible conduit tubes that are to be erected on the foundation or other surface are connected in a predetermined manner. . Next, as shown in FIG. 2, the metal fitting main body 1 is strongly pressed and bent from both ends in the longitudinal direction, and in this state, the mounting portion 3 is
The reinforcing bar member S is positioned within the reinforcing bar member S, the pressing force is released at a predetermined position of the reinforcing bar member S, and the metal fitting main body 1 is attached to the reinforcing bar member S by the elastic return force generated at that time. Of course, the temporary support position of the wiring box B at this time is attached to the reinforcing steel member S at a position corresponding to the buried position in the concrete body C, which is positioned according to a predetermined design. After that, as shown in FIGS. 3 and 4, the fixing bolts 35 inserted into the fixing holes drilled from the surface of the temporary concrete frame P are inserted into the first to third bolts.
In the case of the support 10 in the fourth embodiment, it is inserted through the knockout in the bottom wall 30 of the wiring box B and screwed into the screw hole 13, whereas in the case of the support 20 in the fourth embodiment, it is inserted directly into the knockout. screw hole 2
2 to support and fix the wiring box B. In addition, 36 in the figure is a nut screwed into the fixing bolt 35 so as to press against the surface of the concrete temporary frame P in order to securely fix the wiring box B and the fixing bolt 35 to the concrete temporary frame P.

Therefore, even if the wiring box B is completely difficult to maintain on its own due to the connection of highly flexible wiring materials W such as direct-buried cables and flexible conduit, it can be temporarily fixed to the reinforcing steel member S very easily. It can be installed in a straight position, and does not interfere with various operations such as assembling reinforcing steel members S, setting the concrete temporary frame P, etc. until it is fixed to the concrete temporary frame P to be erected.

That is, when the metal fitting main body 1 itself is pressed into a bifold shape, an elastic restoring force acts to restore it to its original state due to the elastic force existing in the main plate 2, and therefore,
The inner circumferential edge surface 3A of the attachment part 3 is crimped to the reinforcing steel member S,
At this time, the inner circumferential edge surface 3A is press-fitted into the surface of the reinforcing bar member S, so that the metal fitting main body 1 is firmly fixed to the reinforcing bar member S. In addition, not only can the mounting position be arbitrarily selected, but also if the elastic return force is limited even after installation, the supports 10 and 20 will be connected to the metal fitting main body 1 and will interfere with the bending operation of the metal fitting main body 1. Coupled with this, the installation position can be changed freely, and the installation work is simple and can be carried out safely even at high places.

The supports 10 and 20 are connected to the wiring box B.
When supporting it on the bottom wall 30 and attaching it to the metal fitting main body 1, it can be easily connected by bending and engaging the connecting claw piece 15 or screwing in the connecting machine screw 24, and moreover, the connecting claw piece Pairs of small through-holes 31 through which the engaging and connecting machine screws 24 of 15 are inserted are opened in the bottom wall 30 in the vertical and horizontal directions, respectively.
On the other hand, since the reinforcing steel members S are usually assembled in a lattice shape,
The mounting condition can be relatively changed depending on the situation at the site, which is convenient.

Further, the supports 10 and 20 are provided with screw holes 13 and 22 into which fixing bolts 35 inserted through the concrete temporary frame P and the bottom wall 30 of the wiring box B are screwed, so that the fixing bolts 35 can be connected. When this is done, the wiring box B is securely fixed in contact with the back surface of the temporary concrete frame P without any slight movement.

As explained above, according to this invention, when various types of wiring boxes are buried and fixed in a concrete structure, wiring boxes connected to highly flexible direct buried cables or flexible conduit can be prevented from wobbling or
It can be temporarily supported on a reinforcing steel member without shaking, and it can be firmly fixed and supported between the concrete temporary frame, and in particular, installation on the reinforcing steel member is extremely simple and easy. In addition to being able to freely change the temporary support position once installed, it is possible to reduce the impact of the concrete material being poured.
It does not easily come off even under load, has a simple structure, and can be provided at low cost, which is extremely useful in practice.

[Brief explanation of drawings]

The drawings show an embodiment of this invention; Fig. 1 is an exploded perspective view of the first embodiment, Fig. 2 is a cross-sectional view of the installed state, Fig. 3 is a side view after installation, and Fig. 4 5 is an exploded perspective view of the second embodiment, FIG. 6 is an exploded perspective view of the third embodiment, and FIG. 7 is a partially cutaway side view showing fixation to a temporary concrete frame. FIG. 8 is an exploded perspective view of the fourth embodiment. B...Wiring box, C...Concrete frame, P...Concrete temporary frame, S...Reinforced member,
W...Wiring material, 1...Metal fittings main body, 2...Main plate,
3... Attachment part, 3A... Inner peripheral edge surface, 5... Bead, 6... Knob operation piece, 7... Connection small hole, 8...
Mounting claw piece, 10...Support, 11...Storage recess,
12... Base, 13... Screw hole, 14... Interlocking board, 15... Interlocking claw piece, 16... Joining protrusion, 17
...Joining hole, 20...Support, 21...Side wall, 2
2...Screw hole, 23...Back wall, 24...Connecting machine screw, 30...Bottom wall, 31...Small through hole, 35...Fixing bolt, 36...Nut.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. When a substantially rectangular main plate made of a highly elastic material such as spring steel is curved near both ends in the longitudinal direction against the elasticity of the main plate. A metal fitting main body is provided with a mounting portion having an inner circumferential edge surface that is pressed against the reinforcing steel member by the elastic restoring force generated when the main plate tries to return to its original state when the reinforcing steel member is inserted into the main plate, and the main plate is embedded in a concrete frame. The wiring box is supported by its bottom wall and attached to the main body of the metal fitting, and the supporting body is equipped with screw holes into which fixing bolts inserted through the temporary concrete frame are screwed. Wiring box temporary support bracket. 2. The support is a 1.
Insert the pair of connecting claw pieces into the center of the main body of the metal fitting,
The embedded wiring box temporary support fitting according to claim 1, which is adapted to be engaged and bent from the outside of the bottom wall of the wiring box. 3 The support body has a curved central part of the main body of the metal fitting, and is erected oppositely on the outside of the curved surface of the central part by the elastic restoring force of the warped central part itself.
A temporary support for an embedded wiring box according to claim 1 or 2, which is held between a pair of L-shaped mounting claws. 4. The support body is formed into a generally groove-shaped cross-section by a pair of side walls facing each other and having edge surfaces that abut against the inner surface of the bottom wall of the wiring box, and a back wall having screw holes drilled therein. The temporary support fitting for an embedded wiring box according to claim 1, wherein a connecting machine screw inserted through the rear wall and the bottom wall is screwed into the center of the main body of the fitting.