JP4492900B2 - Deck plate ceiling hanging bracket - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a deck plate used when the lower concrete form plate of a concrete slab is also used, that is, a deck plate (generally referred to as a super E deck) having dovetail grooves at appropriate intervals. The present invention relates to a ceiling hanger that is attached to a groove and is used to suspend various pipes, ducts, ceiling plate attachment frame members, and the like with suspension bolts.
[0002]
[Prior art]
As this type of ceiling suspension fitting, a pair of left and right side walls that are extended from the left and right ends of a bottom plate portion having a through screw hole to the left and right by a suspension bolt that threadably penetrates the through screw hole are connected in series, and both side wall portions At the upper end of the ceiling plate, there is considered a ceiling hanging bracket in which a locking portion for retaining is formed that fits into the left and right corners of the dovetail portion of the deck plate when pushed to the left and right with a suspension bolt.
[0003]
By the way, in this type of conventional ceiling hanging metal fitting, the downward load acting on the suspension bolt is caused by fitting between the locking portion for retaining on both side walls and the left and right side corners of the dovetail portion of the deck plate, The deck plate has a dovetail groove that can be reliably supported by acting on both the left and right shoulders, but the engagement depth of the locking stoppers on both side walls to the dovetail portion of the deck plate is shallow, Since there is a gap between the locking part for retaining the part and the bottom of the dovetail part of the deck plate, when the horizontal and lateral bending force acts on the suspension bolt, the suspension bolt and the ceiling suspension bracket are integrated. And the locking portion for retaining the one side wall part comes off from the dovetail part of the deck plate. That is, when a horizontal bending force is applied to the suspension bolt on which a downward load is applied, the ceiling hanging bracket may easily come off from the dovetail portion of the deck plate.
[0004]
[Means for Solving the Problems]
The present invention has been made to solve the conventional problems as described above. The features of the present invention are shown in parentheses with reference numerals of the embodiments described later. The ceiling hanging bracket is provided with a pair of left and right side wall portions 5 that are extended from the left and right ends of the bottom plate portion 4 having the through screw holes 3 to the left and right by suspension bolts 4 that are threaded through the through screw holes 3. At the upper end of the wall portion 5, a ceiling portion 7 is formed with a retaining portion 7 for retaining to be fitted to the left and right corners 14 of the dovetail portion 12 of the deck plate 11 when it is pushed right and left by the suspension bolt 2. It is a hanging metal fitting, and when the locking part 7 for retaining at least is fitted to the left and right side corners 14 of the dovetail part 12 of the deck plate 11 on the both side wall parts 5, the dovetail part 12 Protrusions that contact the outside of the left and right shoulders 13 9 has a configuration that is provided.
[0005]
When the ceiling hanging bracket for a deck plate of the present invention having the above-described configuration is implemented, the both side walls 5 have a quadrangular shape in which a quadrilateral connecting four corners in a cross section at a position directly below the retaining locking portion 7 is inclined. When the side wall portions 5 are rotated in the screwing direction of the suspension bolt 2 with the retaining locking portion 7 inserted in the dovetail groove portion 12 of the deck plate 11, the tilting is performed. Of the four corners of the parallelogram, one side of each side wall 5 (the side of the oblique side wall 6a) corresponding to the two corners having the longer diagonal line is formed in the dovetail groove 12 of the deck plate 11. The protrusions 9 are configured to stop against the inner sides 13a of the shoulders 13 and the projecting portions 9 are arranged on the side walls (sides of the oblique side wall 6a). ) Can only project.
[0006]
Further, the projecting portions 9 can be provided so as to project from both sides of the both side wall portions 5. Further, in any case, the protruding portion 9 can be formed integrally with the side wall portions 5 by protruding a part of the plate material constituting the side wall portions 5.
[0007]
Further, the side wall portions 5 extend the plate material that is integrally bent from the bottom plate portion 4 so as to be spaced apart from the facing plate portion 21 that is closer to the upper side and the upper end side of the facing plate portion 21 to the outside. Bending and drawing into a substantially symmetrical outward-facing spoon shape comprising an upper end plate portion 22 to be brought out, and both side plate portions 23 that connect both sides of the facing plate portion 21 and both sides of the upper end plate portion 22. The notch recesses 24 are provided in the both side plate parts 23 of the both side wall parts 5, and the upper side of the notch recesses 24 is used as the retaining locking part 7 and the lower side of the notch recesses 24. Can be the protruding portion 9.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
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 ceiling suspension bracket according to the present invention, and a through screw hole 3 through which a suspension bolt 2 is screwed and penetrated. And a side wall portion 5 that is bent upward from both left and right sides of the bottom plate portion 4. The through screw hole 3 is formed by machining a thread groove inside a cylindrical portion 4 a integrally formed upward from the bottom plate portion 4, but the bottom plate portion is matched with the through hole provided in the bottom plate portion 4. A nut can be fixed to the upper side or the lower side of 4.
[0009]
Each side wall portion 5 is integrally formed by bending press processing of a plate material integrally connected from the bottom plate portion 4, and an operation portion 6 for expanding and extending from an inward projecting portion, and an upper portion of the operation portion 6 for expanding and expanding. Each of the side wall portions 5 is formed with a retaining locking portion 7 formed of an outward projecting portion, a suspension bolt contact portion 8 formed of an inwardly facing plate portion at the upper end of the retaining locking portion 7, and the side wall portions 5. And a wing-like projecting portion 9 continuously provided from the side located on the opposite side, and the operation portion 6 for spreading composed of the inward projecting portion has a substantially vertical shape in the central longitudinal section and its top position. Of the oblique side wall 6a, which is formed by three-dimensional bending press processing so that the cross section at the right side is substantially trapezoidal, and is located on the opposite sides of the substantially triangular oblique side wall portions 6a, 6b on the left and right sides thereof. The wing-like protrusion 9 is formed by extending a side. In addition, a vertically extending suspension bolt guide groove 10 is formed in the push-and-open operation portion 6 formed of an inward protruding portion by pressing.
[0010]
In FIG. 1B, 11 is a deck plate to which the above-described ceiling hanging bracket 1 is attached, and a dovetail groove portion 12 recessed into the concrete slab side is formed at appropriate intervals, which also serves as the lower form plate of the concrete slab. Has been.
[0011]
More specifically, in the ceiling hanging bracket 1, as shown in FIGS. 2A and 2B, the retaining locking portion 7 at the upper end of each side wall portion 5 is arranged in parallel with the length direction of the dovetail portion 12 of the deck plate 11. The spacing between the outer sides of the locking stoppers 7 is set wide so that the locking stoppers 7 can be inserted into the dovetail grooves 12 of the deck plate 11 only in the direction. As shown in FIG. 2B, the quadrilateral connecting the four corners in the transverse section at the position directly below the retaining stopper 7 (position of the oblique side walls 6a and 6b) is an inclined parallelogram. It is configured as follows.
[0012]
As shown in FIG. 2A, in a state where the retaining locking portion 7 is inserted into the dovetail groove portion 12 of the deck plate 11, the both side wall portions 5 are screwed in the direction in which the suspension bolts 2 are screwed (arrows in FIG. 2B). 3B, as shown in FIG. 3B, one side of each side wall 5 corresponding to the two corners having the longer diagonal line among the four corners of the tilted parallelogram (oblique side walls) The side edge of the portion 6 a is configured to abut against the inner sides 13 a of the shoulder portions 13 of the dovetail portion 12 of the deck plate 11 to prevent rotation, and the wing-like protrusions 9 are formed on the side walls 5. Only one side (the side of the oblique side wall 6a) that serves as a detent is provided continuously.
[0013]
When the ceiling hanger 1 having the above-described configuration is used, the hanger bolt 2 is not inserted into the through screw hole 3 of the bottom plate portion 4 and the upper end of the hanger bolt 2 does not spread the operation portion 6 for spreading the both side walls 5. As shown in FIGS. 2A and 2B, the ceiling hanging bracket 1 is attached to the ceiling hanging bracket 1 using the suspension bolts 2, and the retaining stoppers 7 at the upper ends of the respective side wall portions 5 are connected to the deck plate 11. The dovetail locking portion 7 is pushed up in a direction parallel to the length direction of the dovetail groove portion 12 and the both locking stoppers 7 are inserted into the dovetail groove portion 12 of the deck plate 11.
[0014]
Next, the suspension bolt 2 is rotated in the screwing direction to integrally rotate the ceiling hanging bracket 1 in the same direction. As shown in FIG. 3A, the pair of retaining locking portions 7 are arranged in the width direction of the dovetail portion 12. The ceiling hanging bracket 1 is rotated so that it fits in the left and right corners 14 of the dovetail portion 12 in parallel, and finally, as shown in FIG. The side of the oblique side wall 6a is brought into contact with the inner sides 13a of the shoulders 13 of the dovetail groove 12. At this time, the wing-like projecting portion 9 is configured to be adjacent to the outer side surfaces (lower side surfaces of the deck plate 11) 13b of the shoulder portions 13 of the dovetail portion 12.
[0015]
When the suspension bolt 2 is further rotated in the screwing direction with the suspension bolt 2 being prevented from rotating by the ceiling suspension bracket 1 as described above, the suspension bolt 2 is screwed with respect to the bottom plate portion 4 of the ceiling suspension bracket 1. 1B, the upper end of the suspension bolt 2 cuts between the operation parts 6 for spreading the both side walls 5 and pushes the side walls 5 to the left and right via the operation parts 6 for spreading both sides. As shown in FIG. 4, the left and right sides of the side walls 5 (sides of the oblique side walls 6 a and 6 b) are all in contact with the inner sides 13 a of the shoulders 13 of the dovetail groove 12 and each retaining The locking part 7 is closely fitted and abutted in the left and right corners 14 of the dovetail groove part 12, and one end part in the left-right width direction of each locking part 7 for retaining and the wing-like protrusion part located below the one end part. 9 is in a state where both shoulder portions 13 of the dovetail portion 12 are sandwiched, and deck play is performed. Hanging mounting bolts 12 to 11 is completed.
[0016]
As shown in FIG. 1B, the suspension bolt 2 is screwed in until it comes into contact with the bottom surface 12a of the dovetail portion 12 of the deck plate 11, so that the suspension bolt abuts the upper ends of the side wall portions 5 on the left and right sides of the suspension bolt 12. When the portion 8 comes into contact and a large downward load is applied to the suspension bolt 2, each retaining locking portion 7 of the side wall portions 5 is deformed inward and falls down from the dovetail portion 12. Can be surely prevented.
[0017]
In the state where the suspension bolt 2 is attached to the dovetail groove portion 12 of the deck plate 11 as described above, when an external force in the lateral direction (the lateral width direction of the dovetail groove portion 12) acts on the suspension bolt 2, the suspension bolt 2 2, the retaining portions 7 for retaining the both side walls 5 of the ceiling hanger 1 that are about to move integrally with the suspending bolts 2, with the abutment portion between the upper end of the suspension bolt 2 and the bottom surface 12 a of the dovetail groove 12. Although it tries to rotate in the groove portion 12, the wing-like protruding portion 9 that abuts against the outer side surfaces (the lower side surfaces of the deck plate 11) 13b of the shoulder portions 13 of the dovetail groove portion 12 is prevented. Even if the fitting depth of the retaining locking portion 7 with respect to the corners 14 on both sides of the dovetail groove portion 12 is shallow, there is no fear that one retaining locking portion 7 that attempts to rotate downward will come off the dovetail groove portion 12. . Of course, even when the upper end of the suspension bolt 2 is not in contact with the bottom surface 12 a of the dovetail groove portion 12, the wing-like projecting portion 9 prevents the rotational movement of the both locking stoppers 7 in the dovetail groove portion 12. There is no change in doing.
[0018]
As shown in FIG. 5, even when the stoppers 7 for retaining the upper ends of the side walls 5 are aligned in the left-right width direction of the dovetail groove 12 of the deck plate 11, The interval between the outer sides of the locking portions 7 for preventing both detachment can be narrowed so that the locking portion 7 can be inserted into the dovetail groove portion 12 of the deck plate 11. In addition, since the distance between the outer sides of the both retaining stoppers 7 is wide, the both retaining stoppers 7 cannot be inserted into the dovetail groove 12 of the deck plate 11 directly above. Even so, as shown in FIG. 6, the ceiling hanging bracket 1 can be inclined so that it can be inserted into the dovetail groove portion 12 in order from the retaining portion 7 on one side. In any case, when the ceiling hanger 1 is rotated in the screwing direction of the suspension bolt 2 with the both locking stoppers 7 inserted into the dovetail grooves 12, the inner sides of the left and right sides of the side walls 5 are It is desirable that the two opposite sides are in contact with the inner sides 13a of the shoulder portions 13 of the dovetail portion 12 so that the ceiling hanger 1 is prevented from rotating.
[0019]
Moreover, in the ceiling hanging bracket 1 in the embodiment shown in FIG. 1 to FIG. 4, the wing-like protrusions 9 are arranged from all the left and right sides of the side walls 5 (sides of the oblique side walls 6 a and 6 b). You may make it project, and only the side (corresponding to the side of the diagonal side of the inclined side wall 6b) corresponding to the shorter one of the diagonal lines of the inclined parallelogram described above among the left and right sides of the side walls 5 may be used. A wing-like protrusion 9 may be provided.
[0020]
7 and 8A and B, the ceiling hanging bracket 20 is a facing plate portion in which plate members that stand up together by bending from the left and right sides of the bottom plate portion 4 provided with the through screw holes 3 approach each other upward. 21, an upper end plate portion 22 extending outward from the upper end side of the facing plate portion 21, and both side plates that connect both sides of the facing plate portion 21 and both sides of the upper end plate portion 22. And both side wall portions 5 formed by bending drawing into a substantially symmetrical outward spoon shape composed of a portion 23, and a notch recess 24 is provided in the both side plate portions 23 of the both side wall portions 5. The upper side of the notch recess 24 is formed in the retaining locking portion 7 and the lower side of the notch recess 24 is the outer surface of the shoulders 13 of the dovetail groove 12 in the deck plate 11 (deck Abutting against the lower surface 13b of the plate 11 It is formed on the protrusion 9 that, the projecting top of the facing plate portion 21 is formed on the push and spread operation unit 6.
[0021]
The ceiling hanger 20 having the above structure inserts the both retaining stoppers 7 into the dovetail groove 12 only in the direction in which the both retaining stoppers 7 are arranged in parallel in the lateral width direction of the dovetail groove 12. As shown in FIG. 8, the both side walls 5 are pushed to the left and right at the upper end of the suspension bolt 2 by screwing the suspension bolt 2 screwed into the through screw hole 3 of the bottom plate portion 4. In addition, by fitting the pair of left and right cutout recesses 24 of each side wall portion 5 to both shoulder portions 13 of the dovetail groove portion 12, the retaining locking portion 7 on the upper side of the notch recess portion 24 is connected to the dovetail groove portion 12. The right and left side corners 14 are fitted inside, and the pair of left and right protrusions 9 on the lower side of the notch recess 24 are formed on the outer side surfaces of the shoulder portions 13 of the dovetail portion 12 (the lower side surface of the deck plate 11) 13b. Can be abutted.
[0022]
【The invention's effect】
As described above, according to the ceiling hanging bracket of the present invention, the hanging bolt is screwed in the state in which the upper and lower locking engagement portions on the both side walls correspond to the left and right corners of the dovetail portion of the deck plate. Rotate both side walls to the right and left to fit them into the corners on both the left and right sides of the dovetail, and suspend the suspension bolt from the dovetail In addition, it can be attached to the deck plate, but the biggest feature is that it has a large external force in the lateral direction (left and right width direction of the dovetail portion) on the suspension bolt attached using the dovetail portion of the deck plate in this way. When the action acts, the locking stoppers at the upper ends of both side walls rotate within the dovetail groove in the swinging direction of the suspension bolt. The protrusions provided outside the both side walls and the left and right sides of the dovetail groove Shoulder outer surface (deck pre Is the point which may be prevented by abutment of the bets underside of the).
[0023]
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 lateral direction (left and right width direction of the dovetail groove portion), the upper end retaining locking portion and the dovetail groove portion on both side walls are assumed. Even if the fitting depth with the left and right side corners is shallow, the locking stopper on one side that tries to rotate downward is removed from the dovetail part and the ceiling hanging bracket (suspending bolt) is detached from the dovetail part There is no fear of falling, and the mounting strength of the ceiling hanger can be greatly improved to increase safety.
[0024]
In addition, according to the structure of Claim 2, the amount of material increase for comprising a protrusion part can be suppressed to the minimum, and a weight increase and cost increase can be suppressed. Of course, it can be configured as described in claim 3 to obtain a more reliable detachment prevention effect, or it can be configured as described in claim 4 to minimize an increase in manufacturing cost. I can do it.
[0025]
Furthermore, according to the structure of Claim 5, since the strength of both side walls can be increased, and the same effect as the effect of the structure of Claim 3 can be obtained at the same time, the ceiling suspension with high safety can be obtained. A metal fitting can be obtained easily.
[Brief description of the drawings]
FIG. 1A is a perspective view of a ceiling hanging bracket, and FIG. B is a partially longitudinal front view showing a state in which a suspension bolt is 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 locking part for retaining a ceiling hanging metal fitting is inserted into a dovetail portion of a deck plate, and FIG. 2B is a cross-sectional plan view in the same state. .
FIG. 3A is a partially longitudinal front view showing a state in which the ceiling hanger is rotated from the state of FIG. 2A, and FIG. 3B is a cross-sectional view showing a state in which the ceiling hanger is rotated until it is prevented from rotating. It is a top view.
FIG. 4 is a cross-sectional plan view of FIG. 1B.
FIG. 5 is a longitudinal sectional front view showing a state immediately before attaching the ceiling hanging bracket to the deck plate in the second embodiment.
FIG. 6 is a longitudinal sectional front view showing a state immediately before the ceiling hanging bracket according to the third embodiment is attached to the deck plate.
7A is a plan view of a ceiling hanger according to a fourth embodiment, and FIG. 7B is a front elevational view of the same part.
8 is a partially longitudinal front view showing a state in which the suspension bolt is attached to the dovetail portion of the deck plate with the ceiling suspension fitting shown in FIG.
[Explanation of symbols]
1,20 Ceiling suspension bracket 2 Suspension bolt 3 Through screw hole 4 Bottom plate portion 5 Side wall portion 6 Pushing and spreading operation portion 7 Locking prevention portion 8 Suspension bolt contact portion 9 Wing-like projection portion 10 Suspension bolt guide concave groove portion 12 Dovetail section 13 Both shoulder sections 13a of dovetail section Inner side 13b of both shoulder sections Outer surface of both shoulder sections (lower side of deck plate)
14 Corner portion 21 on both right and left sides of dovetail portion Face plate portion 22 on side wall portion Upper end plate portion 23 on side wall portion Both side plate portions 24 on side wall portion Notch recess on side wall portion

Claims (5)

  A pair of left and right side walls that are extended to the left and right by suspension bolts that threadably penetrate the through screw holes are provided from left and right ends of the bottom plate portion having through screw holes. A ceiling hanging bracket formed with a locking portion for retaining to be fitted to the left and right corners of the dovetail portion of the deck plate when pushed to the left and right, wherein the side wall portions include at least the removal A deck plate provided with protrusions that come into contact with the outer sides of the left and right shoulders of the dovetail portion of the deck plate when the locking portion is fitted to the left and right corners of the dovetail portion of the deck plate. Ceiling hanging hardware.   The both side walls are configured such that a quadrilateral connecting four corners in a cross section at a position directly below the retaining stopper is an inclined parallelogram, and the retaining stopper is connected to the deck. When both side wall portions are rotated in the screwing direction of the suspension bolt while being inserted into the dovetail portion of the plate, both sides corresponding to the two corners having the longer diagonal line among the four corners of the inclined parallelogram Each one side of the wall is configured to be in contact with the inner side of both shoulders of the dovetail portion of the deck plate to prevent rotation, and the protruding portion is configured to prevent the rotation of both side walls. The ceiling hanging bracket for a deck plate according to claim 1, wherein the ceiling hanging bracket is protruded only on a side.   The ceiling hanging bracket for a deck plate according to claim 1, wherein the protruding portions are provided so as to project from both sides of the both side walls.   The deck projection ceiling hanging bracket according to any one of claims 1 to 3, wherein the projecting portion is formed integrally with the both side wall portions by projecting a part of a plate material constituting the both side wall portions. The both side wall portions are plate members that are integrally bent from the bottom plate portion, facing plate portions that approach each other upward, and upper end plate portions that extend away from the upper end side of the facing plate portion to the outside. The both side walls of the facing plate portion and both side sides of the upper end plate portion are bent and drawn into a substantially symmetric outward spoon shape, notched concave on both sides plate portions provided with the upper side of the notch recesses are formed on the stopper for locking portions missing the lower cutout recess is formed in said projecting portion, to claim 1 The ceiling hanging bracket for the deck plate as described.

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