JPH0644970Y2 - Ceiling hanging hardware - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention fits and engages with a concave groove having an inverted trapezoidal cross section formed in a ceiling material called a deck plate for constructing a composite slab, The present invention relates to a ceiling hanging hardware used for suspending pipes and the like.

(Problems to be Solved by Conventional Techniques and Inventions) As this type of ceiling hanging hardware, for example, Japanese Patent Laid-Open No. 63-1380
As described in Japanese Patent Publication No. 38, a pair of side plates having a symmetrical dogleg shape in which the upper end vicinity is bent inward is continuously provided from both sides of the bottom part through which the suspension bolt is screwed and penetrated, and both side plates are further provided. It is known to have metal fittings in which bent pieces are arranged inward from the upper end of.

With this hardware, the suspension bolt is rotated and raised with the upper end portion penetrating into the concave groove of the ceiling material from below, and the bending portions of the both side plates are pushed outward by the suspension bolt to spread outward above the bending portion. The part is fitted and locked in the groove, and further the lifting bolt is rotated and raised so that the upper end of the hanging bolt is pressed against the bottom of the groove. Is what you use.

The problem with such a conventional ceiling hanging metal fitting is that if the hanging bolt is not rotated and the bending portions of both side plates of the metal fitting are pushed outward, the metal fitting is temporarily fixed to the groove so as to be movable in the longitudinal direction. And the downward load acting on the hardware via the hanging bolts works in the direction to extend the bent part of the metal both side plates, so if the strength against this extension force is not made sufficiently large, a large load will be used. It is that it cannot be hung.

In addition to the above ceiling hanging hardware, for example, Japanese Utility Model Application No. 57-1989
As disclosed in No. 20 microfilm, there is also known an inverted trapezoidal metal fitting that is fitted into the groove and then rotated 90 degrees to engage with the groove irremovably. This hardware is fixed to the upper end of the hanging bolt and has the feature that it can be temporarily fixed so that it can move in the groove length direction.
The position is not stable unless a downward external force is applied to the hardware, and there are the following serious problems.

That is, since it is a metal object having a width smaller than the lower opening width of the concave groove,
After the fitting is inserted into the groove and rotated 90 degrees and locked and fixed in the groove, when a rotating force centering on the hanging bolt acts on the metal, the metal is relatively easy to move in the groove. When the metal piece rotates, the direction of the metal object returns to the direction in which the metal piece is fitted into the groove, and the metal piece falls off.

(Means for Solving the Problem) The present invention is to provide a new ceiling hanging hardware capable of solving the above problems of the conventional ceiling hanging hardware, and the features thereof will be described later. The parenthesized reference numerals in FIG. 4 indicate a bottom portion (4) having a through screw hole (3) in the vertical direction, and a pair of side plate portions (5a) which are provided continuously from both sides of the bottom portion (4). , 5b) and the outer width between the upper ends (6a, 6b) of the pair of both side plate portions (5a, 5b) is such that the facing direction of the both side plate portions (5a, 5b) is the ceiling material (10). In a state of being orthogonal to the length direction of the formed recessed groove (11) having an inverted trapezoidal cross section, the width of the both side plates is narrower than the width of the narrow opening (11a) of the recessed groove (11). The inner width between the upper end portions (6a, 6b) of the portions (5a, 5b) is narrower than the outer diameter of the suspension bolt (12) threadedly penetrating the through screw hole (3), and further the both side plate portions (5a, 6b). 5b) upper edge (6a, 6b) both sides of (7),
When the upper end portion (6a, 6b) is rotated 90 degrees in the groove (11), the upper end (6a, 6b) is inclined upward so as to come into contact with the inverted C-shaped both side surfaces (11b) of the groove (11). In point.

Also, in the preferred embodiment of the present invention, both side plate portions (5a, 5b)
Is inclined inward as a whole, and both side plate parts (5a, 5b)
Protrusions (8a, 8b) are formed inside the vicinity of the upper end of the suspension bolts (12) threaded through the through screw holes (3), pushing both protrusions (8a, 8b) outward and ascending. At this time, the both side plate portions (5a, 5b) are configured to have a substantially parallel vertical posture.

(Embodiment) An embodiment of the present invention will be described below with reference to the attached exemplary drawings.

In FIG. 1 and FIG. 2, reference numeral 1 denotes a ceiling metal fitting according to the present invention, which has a bottom portion 4 having a vertical through screw hole 3 formed by fixing a nut 2 on the upper side, and a bottom portion 4 of the bottom portion 4. A pair of left and right side plate portions 5 which are continuously provided upward from both left and right sides so as to be inclined inward so that the tips are close to each other.
a and 5b are provided, and the left and right side edges 7 at the upper end portions 6a and 6b of the both side plate portions 5a and 5b are inclined upward. Further, inward projecting portions 8a, 8b are formed inside the upper end portions 6a, 6b.

As shown in FIG. 3, the ceiling material (deck plate) 10 that also serves as the lower formwork when forming the concrete slab 9
In the valley portion 10a of the
1 is formed over the entire length of the valley portion 10a. Thus, as shown in FIG. 3, the outer width between the upper end portions 6a, 6b of the side plate portions 5a, 5b in the above ceiling hanging hardware 1 is determined by the side plate portions 5a, 5b.
Inverted trapezoidal groove 1 in which the facing direction of b is formed in the ceiling material 10
In the state of being orthogonal to the length direction of 1, the width of the recessed groove 11 is narrower than the width of the narrow opening 11a, and the inner width between the upper end portions 6a, 6b of the both side plate portions 5a, 5b is And the presence of the protruding portions 8a and 8b, the hanging bolt 12 that threadably penetrates the through screw hole 3
Narrower than the outer diameter of the upper end 6a, 6b of both side plate parts 5a, 5b.
Both side edges 7 are inclined upward so that the upper end portions 6a, 6b are brought into contact with the inverted C-shaped both side surfaces 11a of the concave groove 11 when the upper end portions 6a, 6b are rotated 90 degrees in the concave groove 11.

Therefore, with the ceiling hanging hardware 1 in a state where the facing direction of both side plate portions 5a, 5b is orthogonal to the length direction of the concave groove 11 on the ceiling material 10 side, the upper end portions 6a, 6b are placed in the concave groove 11. Can be inserted upwards. After fitting, the ceiling hanging hardware 1 is rotated 90 degrees around the axis of the through screw hole 3 thereof, so that both side plate portions 5a, 5b of the hardware 1 are rotated as shown in phantom lines in FIG. 3 and FIG. It is possible to lock the metal piece 1 in the concave groove 11 by bringing the inclined both sides 7 of the upper end portions 6a, 6b into contact with the inverted C-shaped both side surfaces 11b of the concave groove 11.

After the ceiling hanging metal fitting 1 locked in the concave groove 11 as described above is moved in the length direction of the concave groove 1 to position the ceiling hanging metal fitting 1, the hanging bolt is attached to the through screw hole 3 in the bottom portion 4 of the ceiling hanging metal fitting 1. 12 is screwed from the lower side, and the upper end 12a of the suspension bolt 12 is pressed against the bottom surface 11c of the groove 11 via the protrusions 8a and 8b of both upper end portions 6a and 6b of the ceiling hanging hardware 1. As a result, the ceiling hanging hardware 1 descends with respect to the hanging bolt 12, and its upper end portion
Both inclined sides 7 of 6a and 6b are in pressure contact with the inverted C-shaped opposite side surfaces 11b of the concave groove 11.

On the other hand, since both upper end portions 6a, 6b are spread by the hanging bolt 12 through the protruding portions 8a, 8b in the length direction of the recessed groove 11, the ceiling hanging hardware 1 rotates about the hanging bolt 12 as a center.
It is possible to surely prevent it by press-contacting the inverted C-shaped both side surfaces 11b of the concave groove 11 and the inclined both side sides 7 of the both upper end portions 6a, 6b. In this way, the ceiling hanging hardware 1 is firmly fixed to the predetermined position of the concave groove 11 via the hanging bolt 12. As shown in FIG. 5, the ceiling hanging hardware 1 fixed to the concave groove 11 with the hanging bolts 12 has a vertical posture in which both side plate portions 5a and 5b are spread in the longitudinal direction of the concave groove and are substantially parallel to each other. Has become.

A pipe 14 or the like can be suspended from the lower end of the suspension bolt 12 via a suitable bracket 13 as shown in the figure.

(Operation and Effect of the Invention) As described above, the ceiling hanging hardware of the present invention has the upper end (6
Reverse trapezoidal groove (11) whose facing direction is a, 6b) on the ceiling material side
It is locked so that it can move in the longitudinal direction of the concave groove (11) only by inserting it upward in the concave groove (11) in a direction orthogonal to the longitudinal direction of the and then rotating it 90 degrees. It can be temporarily stopped.

Then, the suspension bolt (12) screwed through the through screw hole (3) of the bottom portion (4) is rotated and raised so that both side plate portions (5a, 5b).
By pushing the upper end portions (6a, 6b) of the groove outward, the upper end portions (6a, 6b) are pushed in the length direction of the concave groove (11), and thus the reverse groove of the concave groove (11). It is possible to widen the gap in the groove length direction between the upper end portions (6a, 6b) where both side edges (7) abut on the V-shaped side surface (11b). Of course, the upper end of the hanging bolt (12) is brought into pressure contact with the bottom surface of the concave groove (11), so that both side edges (7) of the upper end portion are inverted C-shaped side surfaces (11b) of the concave groove (11).
The ceiling hanging metal fitting (1) can be completely fixed to the concave groove (11) by being pressed against.

According to such a ceiling hanging hardware of the present invention, it is possible to temporarily fix the groove in the longitudinal direction of the concave groove (11) simply by inserting it into the concave groove (11) on the ceiling material side and rotating it by 90 degrees. Since it is possible to set the position and fix the metal fitting (1) by hand until it is fixed with the hanging bolt 12,
Installation work to 1) can be done easily and efficiently.

Moreover, when fixed to the groove (11) with the hanging bolts (12), the pair of side plate portions (5a, 5b) are oriented orthogonally to the groove length direction, and the reverse claws of the groove (11) are not formed. Character side (11
The downward load acting on the hardware (1) in the state where b) and the upper end portions of both side plate portions (5a, 5b) are in contact with each other is the upper end portion of both side plate portions (5a, 5b). The ceiling hanging hardware (1) does not fall off from the concave groove (11) unless the upper end portions (6a, 6b) are buckled so as to compress (6a, 6b) in the plate surface direction.

Therefore, unlike the conventional hardware of this type, it is not necessary to provide reinforcement measures such as connecting bent pieces that come into contact with the hanging bolts so that the upper ends of both side plates are not bent inward under a downward load. However, it can be used as a ceiling-mounted metal fitting with high safety that can withstand a heavy load although it can be implemented at low cost.

Further, it is a matter of course that the ceiling bolt (1) can be completely fixed in the groove (11) by pressing the upper end of the hanging bolt (12) against the bottom surface of the groove, but in this fixed state, With both side plate portions (5a, 5b) pushed out in the groove length direction and the space between the upper end portions (6a, 6b) widened in the groove length direction, the upper end portions (6a, 6b) Since both sides (7) of the groove are pressed against the inverted C-shaped side surface (11b) of the groove, the groove (1
Although the 90-degree rotation operation for temporary fixing to 1) can be performed lightly and easily, when it is fixed in the groove (11), it cannot rotate substantially. Therefore, it can be safely used even in a situation where a large rotating force acts on the ceiling hanging hardware (1) through the hanging bolt (12).

In particular, as shown in the examples, the entire side plate portions (5a, 5b) are inclined inward, and the protrusions (8a, 8b) are formed inside the upper ends of the side plate portions (5a, 5b). Then, the suspension bolt (12) threadedly penetrating the through screw hole (3) has two protrusions (8).
a) and (8b) to the outside and lift them up,
When the a, 5b) are configured to be in a substantially parallel vertical posture, there is no possibility of causing bending deformation on both side plate parts (5a, 5b) even when a large downward load is applied in use. Further, the resistance against the rotation around the suspension bolt (12) is further increased, and the safety can be further improved.

[Brief description of drawings]

FIG. 1 is a partially longitudinal front view, FIG. 2 is a side view, and FIG. 3 is a partially longitudinal front view showing a state in which a ceiling hanging metal fitting is fitted in a groove formed in a ceiling material, and FIG. 4 is used. FIG. 5 is a partially vertical front view of the state, FIG. 5 is a vertical side view of the same, and FIG. 6 is a transverse plan view of the same. 1 ... Ceiling hanging hardware, 3 ... Through screw hole, 4 ... Bottom part,
5a, 5b ...... a pair of side plate parts, 6a, 6b ...... upper end part, 7 ...... inclined both sides, 8a, 8b ...... protruding part, 10 ...... ceiling material (deck plate), 11 ...... inverted trapezoidal cross section Grooves, 11a ... Small opening, 11b ... Both sides of inverted C-shape, 11c ... Bottom, 12 ... Hanging bolt.

Claims (2)

[Scope of utility model registration request] 1. A bottom portion (4) having a through screw hole (3) in the up-down direction, and a pair of side plate portions (5a, 5b) continuously provided from both sides of the bottom portion (4). The outer width between the upper end portions (6a, 6b) of the pair of both side plate portions (5a, 5b) is a concave cross-section which is formed in the ceiling material (10) in the facing direction of the both side plate portions (5a, 5b). The groove is narrower than the narrow opening (11a) of the concave groove (11) in the direction orthogonal to the longitudinal direction of the groove (11) and the upper end of the both side plate portions (5a, 5b). The inner width between the parts (6a, 6b) is narrower than the outer diameter of the suspension bolt (12) threadedly penetrating the through screw hole (3), and further, the upper end parts (6a, 6a, 5b) of both side plate parts (5a, 5b) are Both sides (7) of 6b) are
When the upper end portions (6a, 6b) are rotated 90 degrees in the concave groove (11), the upper end portions (6a, 6b) are inclined upward so as to come in contact with the opposite C-shaped side surfaces (11b) of the concave groove (11). Ceiling hanging hardware. 2. The both side plate portions (5a, 5b) are inclined inward as a whole, and projecting portions (8a, 8b) are formed inside the upper end portions of the both side plate portions (5a, 5b) to penetrate the plate. When the suspension bolt (12) threaded through the screw hole (3) pushes both protrusions (8a, 8b) outward and rises, both side plate portions (5a, 5b) assume a substantially parallel vertical posture. . Ceiling hanging hardware according to the scope of claims for utility model registration.