JPH036111Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a bushing-cum-insert mounting device, and more specifically, to a cell for introducing electrical wiring into a deck plate that constitutes a duct for indoor wiring. This invention relates to an insert mounting device which can be used as a bushing by attaching it to a bushing, and which can also be used as an insert stud by attaching an insert upper body to the bushing.

[Conventional technology]

When introducing electrical wiring into a deck plate that constitutes a duct for indoor wiring, a cell is attached to the deck plate, and an insert stud device is attached to the cell. Conventionally, this type of device has a structure in which a bushing having a U-shaped circumferential groove opening outward is divided into a plurality of upper and lower parts, and the lower bottom surface of the insert and the opening of the cell lid are connected between the U-shaped grooves of the circumferential groove. There is a structure in which the inner peripheral part is sandwiched and fixed together with vertical screws. In addition, the insert ring is inserted from the bottom of the cell lid, and the lower part of the insert is screwed into the cylindrical part of the insert ring that protrudes above the opening of the cell lid. There is an internal thread connection structure in which the male thread on the lower outer periphery of the insert is screwed into the female thread.

[The problem that the idea attempts to solve]

In any of the above configurations, in order to attach the bushing to the cell lid, it is necessary to interpose a part of the component to the blind part inside the cell and fix it, which is extremely difficult and troublesome. It requires a lot of work and is time consuming. When inserts such as insert studs and insert boxes are to be drilled in the concrete for retrofitting after concrete is poured, the holes are drilled with a diameter larger than the outer periphery of the box or the like. Therefore, there is a disadvantage and inconvenience that the gaps created there must be repaired with concrete and mortar, and an improvement is strongly desired.

The present invention was developed in view of the above problems, and its purpose is to allow a bushing to be easily attached to the opening of the cell lid by an operation from outside the cell, and to stably and quickly attach the insert's upper body to the bushing. A bushing insert that can be bonded and, furthermore, only requires drilling as small a hole as possible in the existing concrete when installing the insert, thereby reducing the gap between the outer circumferential surface of the insert and eliminating the need for mortar repair to close the gap. Another object of the present invention is to provide a mounting device.

[Means to solve the problem]

The invention is applied to an insert device attached to a cell for introducing electrical wiring into a deck plate.

Its characteristics are as shown in Figure 1.
A bushing 2 fitted into an opening 1a formed in the upper part of the cell lid 1 is formed into a short cylindrical shape, and a protrusion 13 is protruded from the outer periphery of the lower part of the bushing 2. In order to attach the insert upper body 7 having the same outer diameter as the outer diameter of the protrusion 13, a male thread 6 is carved to engage with a female thread 8 formed on the inner surface of the insert upper body 7. The bushing 1 below the projection 13 has
A hanging portion 14 is extended to be inserted into the opening 1a of the cell lid 1, and a mounting seat 3 is formed on the inner surface of the bushing 1 for mounting a mounting screw 4 passing through the bushing 1 vertically. A hanging claw 5 is provided below the mounting seat 3 and is screwed onto the tip of the mounting screw 4 and rotates around the tip in a horizontal plane. A notch 14a (see FIG. 3) is formed to provide a space for moving and retreating.

[Effect]

By rotating the mounting screws 4, 4, the hooks 5, 5 attached to the lower surface of the bushing 2 are attached to the hanging part 14.
into the notches 14a, 14a and retreat. In this state, the bushing 2 is fitted into the opening 1a formed in the upper part of the cell lid 1, and the bushing 2 is inserted into the cell lid 1 using the protrusion 13 extending from the outer periphery of the lower part.
I'll put it on. The hanging portion 14 extending downward from the projection 13 is inserted into the opening 1a of the cell lid 1.

When the bushing 2 is fitted into the opening 1a, the mounting screw 4 is rotated in the opposite direction to move the hooks 5 toward the protrusion 13. The hook 5 engages with the lower surface of the cell lid 1, and the projection 13 and the hook 5 lock the cell lid 1.
The bushing 2 is attached to the cell lid 1 by partially sandwiching the periphery of the opening 1a. Then, when the mounting screw 4 is further tightened, the hook 5 completely fixes the bushing 2 to the cell lid 1.

When the female screw 8 of the insert upper body 7 is screwed into the male screw 6 above the protrusion 13, the insert device becomes. The hole drilled in the existing concrete to guide the insert upper body 7 to the bushing 2 only needs to be slightly larger than the outer diameter of the insert upper body 7, and the outer diameter of the protrusion 13 is also larger than the outer diameter of the insert upper body 7.
Since the outer diameter is the same as the outer diameter of the insert upper body 7, there is only a small gap remaining around the insert upper body 7, and there is no need for a gap filling operation.

[Effect of idea]

This invention provides a male thread on the bushing, matches the outer circumference of the protrusion formed on the lower outer periphery with the outer circumferential diameter of the insert upper body, and also includes a hanging part below the lower protrusion that is fitted into the opening of the cell lid. Along with forming the
Since hooks that rotate horizontally on the inside and outside of the hanging part are provided, the bushing can be easily attached and fixed to the cell simply by operating from the outside of the cell. When attaching the insert upper body to the bushing, it is sufficient to drill a hole in the existing concrete that is equal to the outer diameter of the protrusion, which reduces the gap between the insert upper body and the outer circumferential surface of the insert body, and allows There is no need for repairs such as mortar filling, which significantly improves workability and reduces construction time and costs.

〔Example〕

Hereinafter, the bushing/insert mounting device of the present invention will be explained in detail based on the drawings.

Reference numeral 1 in FIG. 1 is a cell lid of a deck plate (not shown), and an opening 1a is provided on the upper surface of the cell lid for introducing electrical wiring and the like. Reference numeral 2 denotes a bushing that is attached to the opening 1a, and its inner peripheral surface has mounting seats 3, 3 that bulge in the inner diameter direction at multiple locations, that is, as shown in FIG. There are separate locations. Mounting screws 4, 4 passing vertically are screwed into each of the mounting seats 3, 3, and horizontally rotatable hooks 5, 5 are attached to the lower tips of the mounting seats 3, 3 through the screw portions. installed.

A projection 13 is projected from the lower outer periphery of the bushing 2 and functions as a stopper when the bushing 2 is fitted into the cell opening 1a. The bushing 2 above the protrusion 13 has a male thread 6 carved therein as shown in FIG.
The insert upper body 7 can be attached by screwing into a female thread 8 formed on the inner surface of the insert upper body 7.

A hanging portion 14 extends below the protrusion 13 in the bushing 2, and the bushing 2 is connected to the cell opening 1a.
When the protrusion 13 is fitted onto the top surface of the cell lid 1, the hanging portion 14 is fitted into the cell.

The insert upper body 7 has a cylindrical shape, and the above-mentioned female thread 8 is formed on the inner periphery of the lower part, and the bushing 2
When screwed together with the male thread 6 of the insert upper body 7
The height l can be adjusted. On the other hand, the outer diameter of the insert upper body 7 is larger than the protrusion 13 below the male thread 6.
The outer diameter of the bushing 2 is set to be equal to the outer diameter of the bushing 2.
When drilling holes in the existing concrete placed on top of the deck plate prior to installation, the diameter will be minimized to eliminate or minimize subsequent repair work. It is considered.

The above-mentioned hanging part 14 is also cylindrical, but since it is necessary to be able to rotate and retract the above-mentioned hanging claw 5, a notch is provided to secure the space as shown in Fig. 3. 14a is formed. In FIG. 1, 9 is a cap that closes the insert upper body 7, 10 is a mounting ring interposed inside the cap 9, 11 is a mark screw, and 12 is a cap that is inserted after the insert upper body 7 is screwed into the bushing 2. This is a mounting screw to keep it in place.

According to such a configuration, the bushing 2 is attached to the cell lid 1 in the following manner, the insert upper body 7 is joined, and the insert device that is attached to the cell for introducing electrical wiring into the deck plate is installed. can be configured.

By rotating the mounting screw 4, the hooks 5, 5, which pass through the mounting seats 3 formed on the upper and lower sides of the inner surface of the bushing 2 and are threadedly engaged with the tips of the mounting screws 4 extending downward, are rotated. Rotate in the horizontal plane as shown by the dashed line or dashed double dot line in Figure 3. A hanging portion 14 that is inserted into the opening 1a of the cell lid 1 extends below the protrusion 13, and the hanging portion 14 has a notch 1 that secures a space for the hook 5 to rotate and retreat.
4a, the rotation of the hooks 5, 5 is not hindered.

In this state, the bushing 2 is fitted into the opening 1a formed in the upper part of the cell lid 1, and as shown in FIGS. 13 stably places the bushing 2 on the cell lid 1. At this time, the hanging portion 14 extending downward from the projection 13 is inserted into the opening 1a of the cell lid 1.

When the bushing 2 is fitted into the opening 1a, the mounting screw 4 is rotated in the opposite direction to position the hooks 5, 5 toward the protrusion 13 as shown in FIGS. 2 and 3.
The hook 5 engages with the lower surface of the cell lid 1, and as shown by the two-dot chain line in FIG. be held in place. The bushing 2 is completely fixed to the cell lid 1 by inserting a hand into the bushing 2 to stop the movement of the hook 5 and tightening the mounting screw 4.

Finally, the female screw 8 of the insert upper body 7 is screwed into the male screw 6 above the protrusion 13, and the height of the insert upper body 7 is set to a predetermined height l. Then, it is preferable to prevent rotation using the mounting screw 12. A hole drilled in the existing concrete to guide the insert upper body 7 to the bushing 2 is connected to the insert upper body 7.
Since the outer diameter of the projection 13 is also the same as the outer diameter of the insert upper body 7, there is no problem when attaching the bushing 2 to the cell lid 1. Then, only a small amount of space remains around the insert upper body 7, and no repair work is required.

By the way, as shown in FIG. 6, a rib processed portion 15 may be formed around the opening 1a of the cell lid 1. In this case as well, in order to attach the bushing 2 to the opening 1a of the cell lid 1, the hook 5 must be inserted into the third
Pull it inward as shown by the two-dot chain line in the figure, lower the bushing 2 into the opening 1a using the hanging part 14 as a guide, and let it settle around the opening 1a with the protrusion 13. Since there is a rib processed part 15, the height of the hook 5 is adjusted and tightened with the mounting screw 4, and it is fixed from a plurality of locations. After this, the procedure for installing the insert upper body 7 is the same as that described above, and while lowering the insert upper body 7 from the hole drilled in the concrete part above the bushing 2, screw it into the male thread 6 of the bushing 2. let

As can be seen from the above explanation, in order to attach the bushing 2 to the opening 1a of the cell lid 1,
If there is a rib-processed portion 15 on the ribbed portion, the hook 5 can be lowered, and regardless of whether or not there is a rib-processed portion 15, the hook 5 can be retracted inward to easily fit the hook. By returning the claw 5, it can be easily tightened and fixed. Furthermore, when attaching the insert upper body to the bushing later, it is only necessary to drill a hole the same size as the outer diameter of the protrusion in the existing concrete, which reduces the distance between the outer circumferential surface of the insert and the hole wall. There is no need for filling mortar repair work. Incidentally, the work of attaching the insert upper body and the bushing to the cell opening in the assembled state is also simple in the same manner as described above.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view of an example in which the insert upper body is attached to the bushing, Fig. 2 is a cross-sectional view taken along the - line in Fig. 1, Fig. 3 is a cross-sectional view taken along the - line in Fig. 1, and Fig. 4 is a cross-sectional view taken along the - line in Fig. 1. The figure is a sectional view taken along the - line in Figure 3.
The figure is a cross-sectional view taken along the line -- in FIG. 3, and FIG. 6 is a cross-sectional view showing a part of the installation procedure when the cell opening is provided with a rib-processed portion. DESCRIPTION OF SYMBOLS 1...Cell lid, 1a...Opening, 2...Butting, 3...Mounting seat, 4...Mounting screw, 5...Hatch claw, 6...Male thread, 7...Insert upper body, 8...
...Female thread, 13...Protrusion, 14...Descent part, 14
a... Notch.

Claims (1)

[Scope of claim for utility model registration] In an insert device that is attached to a cell for introducing electrical wiring into a deck plate,
The bushing that is fitted into the opening formed at the top of the cell lid is formed into a short cylindrical shape, and a projection is protruded from the outer periphery of the lower part of the bushing. In order to attach the insert upper body having an outer diameter, a male thread is carved to engage with a female thread formed on the inner surface of the insert upper body, and the bushing below the projection is inserted into the opening of the cell lid. A hanging part is extended, and a mounting seat is formed on the inner surface of the bushing for mounting a mounting screw that penetrates vertically, and a mounting seat is formed below the mounting seat to be screwed into the tip of the mounting screw. A bushing double-use insert is provided with a hook that rotates in a horizontal plane around the hanging portion, and the hanging portion is formed with a notch that secures a space for the hook to rotate and retreat. Mounting device.