JP2002054262A - Ceiling hanging metal fitting for deck plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the safety of a ceiling hanging metal fitting used to hang various pipes and ducts and a ceiling board mounting frame member by means of hanging bolts by attaching it to a dovetail groove part of a deck plate. SOLUTION: This ceiling hanging fitting is constituted such that a pair of right and left side wall parts 5 pushed and widened to the right and left by a hanging bolt 4 which is screw-fitted and passes through a through screw hole 3 are continuously provided from both right and left ends of a baseplate part 4 having the through screw hole 3 and a locking part 7 fitted in internal angle parts 14 on both right and left sides of the dovetail groove part 12 of the deck plate 11 when both side wall parts 5 are pushed and widened to the right and left by a hanging bolt 2 is formed at an upper end of both side wall parts 5. A protruding part 9 coming into contact with outer sides of both right and left side shoulder parts 13 of the dovetail groove part 12 when at least the locking part 7 is fitted in both right and left side internal angle parts 14 of the dovetail groove part 12 of the deck plate 11 is provided in both side wall parts 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deck plate for use as a lower concrete form plate of a concrete slab, that is, a deck plate provided with dovetails at appropriate intervals (generally, a super E deck). (Referred to as a dovetail groove), and is used to suspend various pipes, ducts, frame members for ceiling plate mounting, and the like using suspension bolts.

[0002]

2. Description of the Related Art A pair of left and right side walls, which are extended from the left and right ends of a bottom plate having a through screw hole to the left and right by means of hanging bolts screwed through the through screw hole, are continuously provided as this type of ceiling hanging bracket. At the upper end of both side wall portions, a ceiling hanging bracket having a retaining portion for retaining that is fitted to the left and right side corners of the dovetail groove portion of the deck plate when the left and right sides are pushed and spread by the hanging bolts. It is considered.

By the way, in this type of conventional ceiling hanging bracket, the downward load acting on the hanging bolt is such that the locking portions on both side walls and the corners at the left and right sides of the dovetail groove of the deck plate are fitted. By doing so, it can act on the left and right shoulders of the dovetail portion of the deck plate to reliably support it, but the fitting depth of the retaining locking portions of both side walls with the dovetail portion of the deck plate is shallow. Since there is a gap between the retaining portions on both side walls and the bottom of the dovetail groove on the deck plate, when a horizontal bending force is applied to the suspension bolt, the suspension bolt and the ceiling suspension bracket are used. Are pivoted together, and the retaining portion of one of the side walls is separated from the dovetail portion of the deck plate. That is, when a horizontal bending force acts on the suspension bolt on which the downward load is applied, the ceiling suspension bracket may easily fall off the dovetail portion of the deck plate.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and its features are indicated by parenthesized reference numerals in the embodiments described later. As shown in the figure, the ceiling metal fitting for a deck plate of the present invention comprises a pair of left and right parts which are spread right and left from both left and right ends of a bottom plate part 4 having a through screw hole 3 by means of a hanging bolt 4 screwed through the through screw hole 3. Side walls 5 are continuously provided, and at the upper ends of both side walls 5, stoppers which fit into the right and left corners 14 of the dovetail groove 12 of the deck plate 11 when pushed right and left by the suspension bolts 2. A ceiling hanging bracket having a locking portion formed therein, wherein at least the retaining portion for retaining 7 is provided on the both side wall portions with a dovetail groove portion of a deck plate.
The protrusion 9 is provided so as to be in contact with the outer sides of the left and right shoulders 13 of the dovetail groove 12 when fitted into the left and right corners 14.

[0005] When the ceiling hanging bracket for a deck plate of the present invention having the above-described structure is embodied, the side walls 5 are inclined by a rectangle connecting four corners in a cross section immediately below the retaining portion 7. When both side wall portions 5 are rotated in the screwing direction of the suspension bolts 2 in a state where the retaining portion 7 for retaining is inserted into the dovetail groove portion 12 of the deck plate 11 while being configured so as to form a parallelogram. Of the four corners of the inclined parallelogram, one side of the side wall 5 (side of the oblique side wall 6a) corresponding to the two corners having a longer diagonal line is a dovetail groove of the deck plate 11. Inner side 1 of both shoulders 13 at 12
The protrusion 9 may be formed so as to be in contact with the side wall 3a so as to be prevented from rotating. I can do it.

Further, the projecting portions 9 can be provided so as to protrude from the respective side edges of the both side wall portions 5. Further, in any case, the projecting portion 9 can be formed integrally with the side wall portions 5 by projecting a part of the plate material constituting the side wall portions 5.

The side wall portions 5 separate the plate members rising from the bottom plate portion 4 by bending processing into a facing plate portion 21 approaching upward from the bottom plate portion 4 and separating the plate material from the upper end side of the facing plate portion 21 outward. And a side plate 23 connecting both sides of the facing plate 21 and both sides of the top plate 22 to form an approximately outwardly symmetric outward spoon. A notch concave portion 24 is provided in the both side plate portions 23 of the both side wall portions 5, and the upper side of the notch concave portion 24 serves as the retaining portion 7 for retaining. The lower side can be the protrusion 9.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the accompanying drawings. In FIG. 1A, reference numeral 1 denotes a steel plate ceiling hanging bracket according to the present invention, in which a hanging bolt 2 is screwed. It has a bottom plate portion 4 having a through screw hole 3 penetrating therethrough, and a side wall portion 5 that is bent upward from both left and right sides of the bottom plate portion 4 and connected. The through screw hole 3 is formed by processing a screw groove inside a cylindrical portion 4 a integrally formed upward from the bottom plate portion 4, but the bottom plate portion is aligned with the through hole provided in the bottom plate portion 4. A nut may be fixed to the upper side or the lower side of 4.

Each of the side wall portions 5 is formed integrally by bending press working of a plate material integrally connected to the bottom plate portion 4, and includes a push-spread operation portion 6 comprising an inwardly projecting portion, Locking portion 7 formed of an outwardly protruding portion formed on the upper side of the bracket, a suspension bolt contact portion 8 formed of an inward facing plate portion at the upper end of the locking portion 7, and each side wall portion 5, a wing-shaped protrusion 9 continuously provided from the side opposite to each other. The push-spread operation unit 6 comprising the inward protrusion has a substantially vertical central cross section and The oblique side walls are formed by three-dimensional bending press working so that the cross section at the apex position is substantially trapezoidal, and the oblique side walls 6a and 6b on the left and right sides are located on opposite sides. The side of the portion 6a is extended to form the wing-like protrusion 9. There. A vertically extending suspending bolt guide groove 10 is formed in the push-spreading operating section 6 formed of an inwardly projecting portion by press working.

In FIG. 1B, reference numeral 11 denotes a deck plate to which the above-mentioned ceiling hanging bracket 1 is attached. The deck plate 11 also serves as a lower mold plate of the concrete slab. It is formed every other.

More specifically, the ceiling hanging bracket 1 includes:
As shown in FIGS. 2A and 2B, the locking portions 7 for retaining at the upper end of each side wall portion 5 are arranged only in a direction parallel to the length direction of the dovetail groove portion 12 of the deck plate 11. The distance between the outer sides of the retaining members 7 is set to be wide so that the dovetail groove 7 can be inserted into the dovetail groove portion 12 of the deck plate 11, and as shown in FIG. 2B, The position immediately below the retaining portion 7 (the oblique side wall portions 6a, 6a)
The square connecting the four corners in the cross section at the position (b) is configured to be a tilted parallelogram.

As shown in FIG. 2A, in a state in which the retaining portion 7 is inserted into the dovetail groove 12 of the deck plate 11, the side walls 5 are screwed in the direction in which the suspension bolts 2 are screwed (see FIG. 2A). 2B (in the direction of the arrow 2B), FIG.
As shown in B, of the four corners of the tilted parallelogram,
Each one side (side of the oblique side wall 6a) of the side wall 5 corresponding to the two corners having the longer diagonal line is the deck plate 11
The dovetail groove 12 is configured to abut against the inner sides 13a of both shoulders 13 of the dovetail portion 12 so as to stop rotation. Part 6
a side).

When the ceiling hanging bracket 1 having the above configuration is used, the hanging bolt 2 is pushed into the through screw hole 3 of the bottom plate 4, and the upper end of the hanging bolt 2 pushes the push-out operating section 6 of the side wall 5. FIGS. 2A and 2B show a state in which the screw is inserted so as not to expand
As shown in the figure, the ceiling suspension fitting 1 is used by using the suspension bolts 2 in such a manner that the retaining portions 7 for retaining at the upper end of each side wall 5 are arranged in parallel in the length direction of the dovetail groove 12 of the deck plate 11. By pushing up, the locking portions 7 for retaining both sides are inserted into the dovetail grooves 12 of the deck plate 11.

Next, the hanging bolt 2 is rotated in the screwing direction to rotate the ceiling hanging bracket 1 integrally in the same direction. As shown in FIG. The ceiling hanging bracket 1 is rotated so as to fit in the corners 14 on both right and left sides of the dovetail groove 12 in parallel in the width direction, and finally, as shown in FIG. The side (side of the oblique side wall 6 a) is brought into contact with the inner side 13 a of both shoulders 13 of the dovetail groove 12. At this time, the wing-shaped protrusion 9 is configured to be adjacent to the outer surfaces (lower surfaces of the deck plate 11) 13b of the both shoulders 13 of the dovetail groove 12.

When the suspension bolt 2 is further rotated in the screwing direction in a state where the suspension bolt 2 is prevented from rotating by the ceiling suspension bracket 1 as described above, the suspension bolt 2 is moved relative to the bottom plate 4 of the ceiling suspension bracket 1. And the upper end of the hanging bolt 2 is interrupted between the push-and-spread operation sections 6 of the both-side wall sections 5 and pushes the both-side wall sections 5 right and left through the push-and-spread operation section 6. As shown in FIGS. 1B and 4, both left and right sides (sides of the oblique side walls 6 a and 6 b) of both side walls 5 abut against the inner side 13 a of both shoulders 13 of the dovetail groove 12. The retaining locking portions 7 are closely fitted and abutted in the corners 14 on both right and left sides of the dovetail groove 12 and are located at one end in the left-right width direction of each of the retaining locking portions 7 and below it. The wing-shaped protrusion 9 sandwiches both shoulders 13 of the dovetail groove 12, Kkipureto hanging bolt 1 to 11
2 is completed.

As shown in FIG. 1B, the suspension bolts 2 are screwed until they come into contact with the bottom surface 12a of the dovetail groove 12 of the deck plate 11, so that the upper ends of the side walls 5 are suspended on the left and right sides of the suspension bolt 12. When a large downward load is applied to the suspension bolt 2, the retaining portions 7 of the side wall portions 5 are deformed inward, and the bolt contact portions 8 are brought into contact with each other, so that the dovetail groove portions 12 are removed. It can be reliably prevented from falling down.

With the hanging bolts 2 attached to the dovetail grooves 12 of the deck plate 11 as described above, when an external force acts on the hanging bolts 2 in the left-right lateral direction (the left-right width direction of the dovetail grooves 12), The retaining portions 7 of the side wall portions 5 of the ceiling hanging bracket 1 that are to move integrally with the hanging bolts 2 are provided at the upper end of the hanging bolt 2 and the bottom surface 1 of the dovetail groove 12.
The rotation of the dovetail groove 12 is caused by the wing-shaped contact of the dovetail groove 12 with the outer surface (lower surface of the deck plate 11) 13b. Since the projection 9 blocks, the dovetail groove 12
Even if the engagement depth of the retaining locking portion 7 with respect to the corners 14 on both sides is small, there is no risk that one retaining locking portion 7 that is going to rotate downward will come off the dovetail groove 12. Of course, even when the upper end of the suspension bolt 2 is not in contact with the bottom surface 12a of the dovetail portion 12, the wing-like projection 9 prevents the rotational movement of the locking members 7 for retaining both ends in the dovetail portion 12. There is no difference in doing.

As shown in FIG. 5, the stopper 7 at the upper end of each side wall 5 is provided with a dovetail groove 1 of the deck plate 11.
2 so as to be able to be inserted into the dovetail groove 12 of the deck plate 11 even in the direction parallel to the left and right width directions. The space between the outer sides may be narrowed. In addition, since the distance between the outer sides of the retaining portions 7 is large, the retaining portions 7 cannot be inserted into the dovetail portion 12 of the deck plate 11 directly above. However, as shown in FIG. 6, the ceiling hanging bracket 1 can be inclined so that it can be inserted into the dovetail groove 12 in order from one of the retaining portions 7 for retaining. In any case, when the ceiling suspension fitting 1 is rotated in the screwing direction of the suspension bolt 2 with the both retaining stoppers 7 inserted into the dovetail groove 12, the left and right sides of the both side walls 5 are formed. It is preferable that the two sides on the opposite sides abut against the inner sides 13a of the both shoulders 13 of the dovetail groove 12 so that the ceiling hanging bracket 1 is prevented from rotating.

Further, in the ceiling hanging bracket 1 in the embodiment shown in FIGS. 1 to 4, the wing-like projection 9 is provided on both left and right sides of the side walls 5 (sides of the oblique side walls 6a and 6b). May be protruded from all of the side walls, or a side corresponding to the shorter side of the diagonal of the inclined parallelogram described above (side of the side wall 6b). ) May be provided with the wing-like projection 9 only.

In the embodiment shown in FIGS. 7 and 8A and 8B, the ceiling hanging bracket 20 is configured such that the plate members rising from the left and right sides of the bottom plate portion 4 provided with the through-screw holes 3 by bending integrally approach each other upward. The facing plate portion 21 and the facing plate portion 21
An upper end plate portion 22 extending from the upper end side to the outside so as to be spaced apart from each other, and both side plate portions 23 connecting both sides of the facing plate portion 21 and both sides of the upper end plate portion 22. The two side walls 5 are formed by bending and drawing in a symmetric outward spoon shape, and the both side plates 23 of the both side walls 5 are provided with cutout recesses 24. The lower side of the notch 24 is formed on the outer side surface (lower side surface of the deck plate 11) 13 b of the dovetail groove portion 12 of the dovetail groove portion 12. The protruding apex of the facing plate portion 21 is formed on the protruding portion 9 in contact with the operating portion 6.
Is formed.

In the ceiling hanging bracket 20 having the above-described configuration, the locking members 7 for retaining both sides of the dovetail groove 12 are provided only in the direction in which the locking portions 7 for retaining both sides are arranged in the width direction of the dovetail groove 12. As shown in FIG. 8, both side walls 5 are pushed right and left at the upper ends of the suspension bolts 2 by screwing the suspension bolts 2 threaded through the through-holes 3 in the bottom plate 4. As shown in FIG.
Is fitted to both shoulders 13 of the dovetail groove 12 so that the retaining portion 7 on the upper side of the cutout recess 24 is fitted inside the right and left corners 14 of the dovetail groove 12. The pair of left and right protrusions 9 on the lower side of the notch recess 24 can be brought into contact with the outer side surfaces (lower side surfaces of the deck plate 11) 13 b of the both shoulders 13 of the dovetail groove 12.

[0022]

As described above, according to the ceiling hanging bracket of the present invention, the retaining portions at the upper ends of both side walls correspond to the corners at the left and right sides of the dovetail portion of the deck plate, respectively.
Just by rotating the suspension bolt strongly in the screwing direction, the side walls are pushed right and left, and the retaining portions at the upper end thereof are fitted into the left and right entry corners of the dovetail groove, and the suspension bolt is inserted into the dovetail. It can be attached to the deck plate while hanging from the groove, but the biggest feature is
Right and left sideways (right and left width direction of the dovetail) on the suspension bolt attached using the dovetail of the deck plate in this way
When a large external force is applied, the locking portions at the upper ends of the both side walls rotate in the swinging direction of the suspension bolts in the dovetail portion. In that it can be blocked by contact with the outer surfaces of the left and right shoulders (lower surfaces of the deck plate).

Therefore, according to the ceiling hanging bracket of the present invention,
Even when a large external force is applied to the suspension bolt in the horizontal direction (left and right width direction of the dovetail groove), the fitting depth between the locking portion for retaining the upper end of the both side walls and the corners on the left and right sides of the dovetail groove is assumed. Even if it is shallow, there is no danger that the locking part on one side that will rotate downward will fall out of the dovetail groove and the ceiling hanging bracket (hanging bolt) will fall out of the dovetail groove, and the mounting strength of the ceiling hanging bracket will be reduced. It can greatly improve the safety.

According to the second aspect of the present invention, an increase in the material for forming the protruding portion can be minimized, and an increase in weight and cost can be suppressed. Of course, it is possible to achieve a more reliable locking effect by configuring as described in claim 3, or to minimize the increase in manufacturing cost by configuring as described in claim 4. I can do it.

Further, according to the structure of the fifth aspect, the strength of both side walls can be increased, and the same effect as the effect of the third aspect can be obtained at the same time. A high ceiling hanging bracket can be easily obtained.

[Brief description of the drawings]

FIG. 1A is a perspective view of a ceiling hanging bracket, and FIG. 1B is a partially longitudinal front view showing a state in which hanging bolts are attached to a deck plate dovetail groove using the ceiling hanging bracket. It is.

FIG. 2A is a partially longitudinal front view showing a state in which a retaining portion of the ceiling hanging bracket is inserted into a dovetail portion of a deck plate, and FIG. B is a cross-sectional plan view in the same state. .

3A is a partially longitudinal front view showing a state where the ceiling hanging bracket is rotated from the state of FIG. 2A, and FIG. 3B is a cross-sectional view showing a state where the ceiling hanging bracket is rotated until the ceiling hanging bracket is stopped; It is a top view.

FIG. 4 is a cross-sectional plan view of FIG. 1B.

FIG. 5 is a vertical sectional front view showing a state immediately before a ceiling hanging bracket according to a second embodiment is attached to a deck plate.

FIG. 6 is a longitudinal sectional front view showing a state immediately before attaching a ceiling hanging bracket to a deck plate in a third embodiment.

FIG. 7A is a plan view of a ceiling hanging bracket according to a fourth embodiment, and FIG. B is a vertical sectional front view of the same part.

8 is a partially longitudinal front view showing a state in which a suspension bolt is attached to a dovetail groove of a deck plate by the ceiling suspension fitting shown in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 20 Ceiling hanging bracket 2 Hanging bolt 3 Through screw hole 4 Bottom plate part 5 Side wall part 6 Pushing operation part 7 Retaining locking part 8 Hanging bolt contact part 9 Wing-like projection part 10 Hanging bolt guide concave part 12 Dovetail 13 Double shoulders of dovetail 13a Inner sides of both shoulders 13b Outer surfaces of both shoulders (lower side of deck plate) 14 Corners into both left and right sides of dovetail 21 Side facing plate 22 Side wall Top plate 23 Both side plates of side wall 24 Notch recess in side wall

Claims (5)

[Claims] 1. A pair of left and right side walls, which are extended left and right by suspension bolts screwed through the through screw holes, are continuously provided from both left and right ends of the bottom plate portion having the through screw holes. Is a ceiling hanging metal fitting formed with a retaining locking portion that fits into the left and right corners of the dovetail groove portion of the deck plate when pushed out to the left and right by the hanging bolt, and is provided on the both side wall portions. When at least the retaining portion for retaining is fitted to the right and left corners of the dovetail portion of the deck plate, a protrusion is provided which comes into contact with the outside of the left and right shoulder portions of the dovetail portion of the deck plate. There are ceiling hanging brackets for deck plates. 2. The two side wall portions are configured such that a square connecting four corners in a cross section at a position immediately below the retaining portion is an inclined parallelogram. When both side walls are rotated in the screwing direction of the hanging bolts with the locking portion inserted into the dovetail portion of the deck plate, two of the four corners of the inclined parallelogram having a longer diagonal line are rotated. Each side edge of both side wall portions corresponding to a corner is configured to abut against both inner side edges of the dovetail portion of the deck plate to prevent rotation, and the protruding portion is configured to prevent the rotation of the both side wall portions. 2. A projection protruding only from each one side of the vehicle.
4. The ceiling hanging bracket for a deck plate described in the above. 3. The ceiling metal fitting for a deck plate according to claim 1, wherein said projecting portions project from respective side edges of said both side wall portions. 4. The deck plate ceiling according to claim 1, wherein said projecting portion is formed integrally with both side wall portions by projecting a part of a plate material constituting both side wall portions. Hanging bracket. 5. The two side wall portions extend a plate material which rises integrally from a bottom plate portion by a bending process so as to be spaced apart from a facing plate portion approaching upward from the bottom plate portion and outward from an upper end side of the facing plate portion. An upper end plate portion, and both side plate portions connecting both sides of the facing plate portion and both sides of the upper end plate portion, are formed by bending and drawing into an outwardly spoon-like shape that is substantially bilaterally symmetric. Notch recesses are provided in the both side plate portions of both side wall portions, an upper side of the notch recess portion is formed in the retaining portion, and a lower side of the notch recess portion is formed in the protrusion. The ceiling hanging bracket for a deck plate according to claim 4.