JP2580797Y2 - Ceiling suspension bracket for deck plate - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a composite slab deck plate integrated with a bottom surface of a concrete slab. The deck plate has a wide groove-like concave portion which enters into the slab. The present invention relates to a ceiling suspension fitting to be attached to the groove-shaped recess of a composite slab deck plate having a locking groove formed inside.

[0002]

2. Description of the Related Art As this kind of ceiling hanging bracket, as described in Japanese Utility Model Application Laid-Open No. 63-5115, for example, a hanging bolt is vertically screwed on the top of the center of a mountain-shaped strip. It is known to provide a through-screw hole through which the through-hole is formed. In the case of forming by processing, the depth of the through screw hole becomes shallow due to the burring process, and there is a possibility that the required suspension strength may not be obtained. In this case, if the nut is simply fixed on the top of the central part of the mountain-shaped strip by welding or caulking, it will be suspended by the height of the nut. The height of the entire bracket is increased. Of course, it is not impossible to adhere to the lower side of the band-shaped plate, but if the welding length around the nut is not made as long as possible, the necessary hanging strength cannot be obtained, and the manufacturing cost is greatly increased.

[0003] However, the above publication discloses that the groove-shaped concave portion of the deck plate is formed very deeply. However, the deck plate having such a deep groove-shaped concave portion is rare. The groove-shaped recess of a general deck plate is very shallow. Therefore, according to the configuration described in the above publication, when the height of the entire hanging bracket is increased by the height of the nut, if the depth of the groove-shaped recessed portion of the deck plate is small, even if the height of the hanging bolt is slightly, Simply protruding from the upper end of the deck plate, the hanging fitting cannot be pushed up from below into the groove-shaped recess of the deck plate to be fitted. For this reason, the height of the mountain-shaped band-like plate itself must be reduced, and the inclination angles of both wing portions of the band-shaped plate become extremely loose, so that the necessary suspension strength cannot be obtained. Of course, increasing the thickness of the plate material constituting the band-shaped plate is also one of the solutions. However, it is difficult to elastically deform the band-shaped plate and fit the groove-shaped recessed portion of the deck plate. And practicality is lost.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned conventional problems. As shown, the ceiling hanging bracket for a deck plate according to the present invention includes a strip-shaped plate (1) bent into a mountain shape with both ends in the longitudinal direction being lowered, and a nut-shaped member (7), and the strip-shaped plate (1).
A rectangular recess (9) having a through hole (10) at the center bottom is formed at the top in the longitudinal direction so as to protrude downward, and the nut-like member (7) is provided with a through screw hole (6). ) And a small-diameter shaft portion (8) formed at the lower end, so that the small-diameter shaft portion (8) passes through the through hole (10) and the upper end protrudes from the recess (9). The small-diameter shaft portion (8) protruding downward from the through hole (10) is fixed to the belt-shaped plate (1) by being crimped into the recess (9) so as not to rotate. Reinforcing ribs (4, 5) for increasing the bending rigidity in the vertical direction are independently formed on both wing portions (2, 3) extending left and right from the concave portion (9) of 1), At the tip of the two wing parts (2, 3), a deck plate (14)
Point (18, 19) is formed to fit into the locking groove (17a, 17b) formed inside the lower end of both side walls of the groove-shaped concave portion (15). The horizontal linear distance (L) between them is characterized in that it is slightly larger than the opening width (D) of the groove-shaped recess (15) of the deck plate (14).

The reinforcing ribs (4, 5) can be constituted by side walls formed by bending both sides of the band-shaped plate (1) downward. Further, in order to increase the strength at the longitudinal center of the strip-shaped plate (1) forming the through screw hole (6), the left and right wing portions (2, 2) are provided on both left and right sides of the recess (9).
A small reinforcing rib (12) different from the reinforcing rib (4, 5) provided in 3) can be provided. Further, inside the upper end of the through screw hole (6) of the nut-like member (7), a screw groove deforming portion that gives a rotational resistance to the suspension bolt (21) screwed upward into the through screw hole (6). Can also be processed.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. Reference numeral 1 denotes a band-like plate which is bent so that the entire end has a mountain shape so that both ends are low. Reinforcing ribs 4, which are formed by a pair of left and right side walls with left and right sides bent downward, are provided on both wing portions 2, 3 which are inclined obliquely downward.
5 is formed, and a through screw hole 6 in the vertical direction is provided at the central top.

The through screw hole 6 is formed by fixing a nut-like member 7 having the through screw hole 6 to the strip 1. The nut-shaped member 7 has a small-diameter shaft portion 8 at the lower end as shown in FIG. 2, and the strip-shaped plate 1 has a shallow square hole into which the lower half of the nut-shaped member 7 is non-rotatably fitted. Concave 9 is formed by press working,
Through hole 1 through which small-diameter shaft portion 8 penetrates in the center of recess 9
0, the nut-shaped member 7 is fitted into the recess 9 from above, and the small-diameter shaft portion 8 is inserted through the through hole 10.
The nut-shaped member 7 is fixed to the band-shaped plate 1 by caulking a small-diameter shaft portion 8 protruding downward from the band-shaped plate 1 so as to sandwich the peripheral edge of the through hole 10.

Reference numeral 11 denotes a projecting portion which projects horizontally on both the left and right sides of the central top of the strip-shaped plate 1. The projecting portion 1
The reinforcing ribs (side walls) 4 and 5 divided at the top of the center of the band-shaped plate 1 are formed by bending the left and right sides of the band-shaped plate 1 downward except for 1. Numeral 12 denotes reinforcing ribs formed by pressing on the left and right sides of the nut-like member 7 (recess 9), and has a low ridge shape extending parallel to the longitudinal direction of the strip-shaped plate 1. It has a lower reinforcing effect than the reinforcing ribs 4 and 5 provided in the reinforcing ribs 2 and 3. The reinforcing ribs 4 and 5 reinforce the central top of the belt-shaped plate 1 to which the nut-shaped member 7 is attached.

The composite slab deck plate 14 integrated with the bottom surface of the concrete slab 13 has a wide groove-shaped recess 15 that enters the inside of the concrete slab 13.
Are provided at appropriate intervals, and locking grooves 17a, 17b having a substantially triangular cross section are formed inside the lower ends of both side walls 16a, 16b of each groove-shaped concave portion 15. Thus, at both ends of the band-shaped plate 1, sharp ends 18, 19 are formed to fit into the locking grooves 17a, 17b.
9 is slightly wider than the width D of the opening of the groove-shaped recess 15.

The ceiling hanging bracket 20 constructed as described above
Prior to use, as shown in FIG.
Is screwed into the through screw hole 6. At this time,
As shown in the drawing, the screwing depth is considered so that the upper end of the suspension bolt 21 does not protrude upward from the through screw hole 6, but a deformed portion of the screw groove is machined inside the upper end of the through screw hole 6.
When the suspension bolt 21 is screwed in, a rotation resistance can be given when the upper end of the suspension bolt 21 reaches the upper end of the through screw hole 6.

The ceiling suspension fitting 20 to which the suspension bolt 21 is coupled is strongly pushed up into the groove-shaped recess 15 of the deck plate 14 by the suspension bolt 21. As a result,
As shown by phantom lines in FIG.
Is bent downward at both side edges of the opening of the groove-shaped recessed portion 15, but due to the presence of the reinforcing ribs 4 and 5, the wing portions 2 and 3 are not bent so as to be curved, respectively. Deforms to bend at the base of a few. When the tips 18, 19 of the two wing portions 2, 3 enter the groove-shaped recess 15, the two wing portions 2, 3 return elastically, even if the strip-shaped plate 1 is not made of spring steel, and the respective tip 18, 18, 19 can be fitted into the locking grooves 17a, 17b on both sides of the groove-shaped recess 15.

After the strip 1 is slanted and the tip 18 of the wing portion 2 on one side is fitted into the locking groove 17a, the center top of the strip 1 is pushed up by the suspension bolt 21 and the other end is pushed up. By bending and deforming the wing portion 3, the tip 19 of the wing portion 3 can be fitted into the locking groove 17b.

As described above, the strip-shaped plate 1 is
5, the suspension bolt 21 is rotated in the screwing direction so that the upper end 21 a protrudes upward from the nut-like member 7, and the lower end 21 a is formed on the bottom surface of the groove-shaped recess 15 in the deck plate 14. Abut. Further, the suspension bolt 21 is further advanced, and the central top portion of the strip-shaped plate 1 is pressed and moved downward through the nut-shaped member 7, so that the tips 18 and 19 of the two wing portions 2 and 3 are moved as shown in FIG. The locking grooves 17a, 1 in the groove-shaped recess 15 on the deck plate 14 side, respectively.
7b, the two wing parts 2, 3 are stretched to fix the suspension bolt 21 vertically. Thus, ceiling materials, pipes, and the like can be suspended from the suspension bolts 21.

The reinforcing ribs 4 and 5 are not limited to those of the above-described embodiment. For example, it may have a ridge shape similar to the reinforcing rib 12. Of course, it is also possible to provide both the reinforcing ribs 4 and 5 formed by bending the side walls and the ridge-shaped ribs. The reinforcing ribs 12 are not essential and may be omitted.

According to the ceiling suspension metal fitting for a deck plate of the present invention which can be implemented as described above, the through screw hole for screwing and penetrating the suspension bolt is formed of a nut-like member which is separate from the belt-like plate. Therefore, a through screw hole having a length necessary to obtain a predetermined suspension strength can be reliably formed, and the nut-like member is attached to the belt-like plate by caulking a small-diameter shaft portion protruding from the lower end. According to the configuration of the present invention, the nut-shaped member can be rotated in a rectangular hole-shaped recess provided in the band-shaped plate with its upper end protruding from the recess. Therefore, the caulking of the small diameter shaft portion at the lower end of the nut-shaped member is not a strong caulking that makes the nut-shaped member unrotatable, but the nut-shaped member is simply removed from the recess. Outside May be a degree that may prevent that, the mounting of the nut-like member is very easy. Further, since the square hole-shaped recess formed at the center top of the band-shaped plate may be shallower than the height of the nut-shaped member, the formation of the square hole-shaped recess is easy.

Further, according to the configuration of the present invention, since the nut-shaped member is fitted and fixed in the square hole-shaped recess provided in the band-shaped plate, the required length can be obtained by using the nut-shaped member. Despite the fact that the through-screw hole can be easily and easily constructed, the nut is placed and fixed on the top of the center of the strip, or the base of both wings of the strip is higher than the nut. The height of the entire suspension fitting can be reduced as compared with the case where the nut fitting / fixing groove is formed in the belt-shaped plate. Further, since the reinforcing ribs for increasing the bending rigidity in the vertical direction are formed on the inclined two wing portions of the belt-shaped plate, the inclination angle of the both wing portions of the belt-shaped plate can be made relatively small. Therefore, the required suspension strength can be ensured while the height of the entire suspension fitting is made sufficiently low. As a result, it is possible to obtain a ceiling hanging metal that can be used without problem even on a general deck plate having a very shallow groove-shaped recess for fitting and fixing the hanging metal.

According to the configuration of the second aspect, the configuration of the reinforcing rib for reinforcing the both wing portions of the strip-shaped plate is simple, and according to the configuration of the third aspect, the reinforcing rib is formed. The bending strength in the vertical direction of the two wing portions can be increased appropriately by the small reinforcing ribs formed on the left and right sides of the concave portion, and even if the thickness of the plate material constituting the band-shaped plate is thin, the hanging bracket can be attached to the deck plate. When pushed into the groove-shaped recess, the wing portions of the band-shaped plate can have elasticity enough to reliably engage with the locking groove of the groove-shaped recess.

Further, according to the structure of the fourth aspect,
While attaching the suspension fitting to the upper end of the suspension bolt while configuring the overall height to the minimum necessary as described above, the upper end of the suspension bolt and the upper end of the nut-shaped member, that is, the upper end of the suspension bracket, It is easy and easy to set the hanging metal fittings on the upper ends of the hanging bolts in a substantially matching state, and as described above, it is used for a general deck plate having a very shallow groove-shaped recess for fitting and fixing the hanging metal fittings. This is suitable for the case.

[Brief description of the drawings]

FIG. 1A is a longitudinal sectional front view showing a use state, and FIG.
The figure is a partial cross-sectional plan view thereof.

FIG. 2A is a vertical sectional side view showing a state before assembly, and FIG. 2B is a vertical sectional side view showing a state after assembly.

FIG. 3 is a partially longitudinal front view illustrating a method of use.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 strip-shaped plate 2 wing portion 3 wing portion 4 reinforcing rib 5 reinforcing rib 6 through screw hole 7 nut-like member 8 small-diameter shaft portion 9 concave portion in which nut-like member fits 10 through-hole through small-diameter shaft portion 12 reinforcing Rib 13 Concrete slab 14 Deck plate 15 Groove recess 16a Side wall of groove recess 16b Side wall of groove recess 17a Lock groove 17b Lock groove 18 Tip of wing portion 19 Tip of wing portion 20 Ceiling hanging bracket 21 Hanging bolt

Claims (4)

(57) [Scope of request for utility model registration] 1. A belt- like plate (1) bent in the shape of a mountain having both ends in the longitudinal direction lowering, and a nut-like member (7).
Through holes in the center of the plate (1) in the longitudinal direction at the top and in the center at the bottom
A square hole-shaped recess (9) provided with (10) projects downward.
The nut-shaped member (7) is formed as follows.
(6) and a small diameter shaft portion (8) formed at the lower end.
The small-diameter shaft portion (8) is formed in the through hole (10).
And the upper end protrudes from the recess (9).
Then, if it is fitted into the concave portion (9) in a non-rotatable manner,
A small-diameter shaft portion protruding downward from the through hole (10).
(8) is fixed to the band-shaped plate (1) by caulking,
Furthermore, it extends right and left from the concave portion (9) of the band-shaped plate (1).
The two wing parts (2, 3) are supplementary to increase the bending rigidity in the vertical direction.
Heavy duty ribs (4, 5) are formed independently for each wing section
At the front ends of the two wing portions (2, 3), locking grooves (17a, 17b) formed inside the lower ends of both side walls of the groove-shaped concave portion (15) in the deck plate (14). Fitting tips (18, 19) are formed, and both tips (18, 1) are formed.
9) is the horizontal linear distance (L) between the deck plate (1)
4) A ceiling hanging metal fitting for a deck plate, which is slightly larger than the opening width (D) of the groove-shaped concave portion (15). 2. The ceiling hanging metal fitting for a deck plate according to claim 1, wherein said reinforcing ribs (4, 5) are formed by bending both sides of the strip-shaped plate (1) downward. . 3. The two wings on both left and right sides of the recess (9).
Separate from the reinforcing ribs (4,5) provided on the minute (2,3)
The ceiling metal fitting for a deck plate according to claim 1 or 2, wherein a reinforcing rib (12) having a small diameter is formed . 4. A threaded through hole in said nut-like member (7).
Inside the upper end of (6), upward into the through screw hole (6)
Gives rotational resistance to the hanging bolt (21) to be screwed
Thread groove deformation portion is processed, the deck plate for ceiling fitting according to claim 1 or 2.