JP7114028B2 - Ceiling mounting bracket and how to install ceiling joist - Google Patents

Description

In the ceiling base, the ceiling joist bent piece is attached to the joist fitting part and the joist support receiving part on the opening side of the joist for the C-shaped or U-shaped base material for receiving the joist. It relates to a joist mounting bracket capable of attaching a joist by holding it from both the inside and the outside.

In general, joists are used to attach C-shaped steel (C-shaped lip groove material) for rafters and purlins that directly constitute the ceiling of the building frame without using hanging bolts. It is attached orthogonally to the base material for receiving or to the C-shaped or U-shaped joist base (base material for joist receiving) attached to the lower end of the hanging bolt. In other words, the joists are arranged and constructed with the opening sides thereof in contact with the lower surfaces of these joist-receiving base materials.

Among the joist mounting brackets used for the conventional ceiling base, the base material fixing part attached to the side or opening side of the joist receiver, the joist fitting part that covers the opening side of the joist, and the joist A so-called fitting type is known, which includes a joist support receiving part that is inserted into an inverted U-shaped groove formed by bending the upper end of the opening side of the hem to support and receive the joist. (See FIG. 10 of Patent Document 1 and FIG. 2 of Patent Document 2).

The one of Patent Document 1 has a flat plate-shaped lower plate (10b) having a V-shaped portion (10i) formed by bending on both left and right sides to be inserted into the inverted U-shaped groove of the joist, and a joist receiver (3) A plate-shaped upper plate (10a) that is locked to the lower flange (3a) and a downward U-shaped reinforcing metal fitting (11) for joining metal fittings that covers the opening side of the joist. The members are provided as a set, and the bolts (10c) are inserted into the through holes (10f), (10e), and (11c) of the bolts (10c) drilled in the center of each member and tightened with the nuts (10d). By fixing, the lower flange (3a) is sandwiched between the tip of the upper plate (10a) and the lower plate (10b) with the joist directly in contact with the lower surface of the joist receiver. By mounting, an inverted U-shaped groove is sandwiched between the V-shaped portion (10i) and the upper plate (10a) to fix the joist.

On the other hand, in Patent Document 2, a receiving member mounting portion (16) that is U-shaped in side view and fixed in a fitted state covering the opening side of the ceiling joist receiver, and an L from this receiving member mounting portion (16) A plate-shaped holder body (11) that is bent into a letter shape and covers the opening side of the joist, and an inverted U-shaped groove of the joist that is press-molded substantially in the center of the holder body (11). A clamping part (21) extending from the joist receiver and a penetrating part ( 27, 28) by tightening the bolts (29) to sandwich the joist receiver, and sandwiching the inverted U-shaped groove between the holder body (11) and the joist mounting portions (13, 15) It is designed to fix the norim.

However, in any of these, the V-shaped portion (10i) inserted into the inverted U-shaped groove of the joist and the joist mounting portions (13, 15) are formed in a flat plate shape, and the bolt ( 10c) and (29) are in a fixed state, so when subjected to vibration load in the vertical direction due to an earthquake, etc., the bolt fastening portion of the through hole (10f) and through portion (28) There is a risk that the weight load and twisting including the ceiling plate will bend downward on both sides around the bolt part, causing rattling, and even worse, the support receiving function of the joist will be lost, leading to a fall. There is

In addition, in Patent Document 1, since the assembly strength to the ceiling joist receiver is inferior and earthquake resistance cannot be expected, the side plates (11b) of the reinforcing metal fittings (11) for joint fittings are directly screwed to both sides of the ceiling joist. By applying the configuration to the holder body (11) of Patent Document 2 and setting the both side portions thereof to the both side surfaces of the joist directly with screws, the assembly clamping strength can be improved. As proposed, the ceiling joist having an inverted U-shaped groove is made of a thin plate material with a plate thickness of about 0.5 mm. In response to the bending deformation of the portion (13), a vibration load is applied intensively to the screwed portion, and deformation and cracking occur due to collision with the screw in the horizontal direction, etc., resulting in screwing function. Not only is the joint damaged, but even worse, the joist itself may be bent or split at the screwed portion.

JP 2008-050784 A JP 2011-256696 A

The present invention has been devised to eliminate the above-mentioned problems, and fixes the joist by clamping the joist folded piece from the inside and outside by the joist fitting part and the joist support receiving part. However, the assembly rigidity strength against torsion and bending deformation of the joist support receiving part is increased, and the bending deformation of the joist support receiving part is ensured when subjected to vibration load in the vertical direction due to an earthquake etc. In addition to the function of holding the joist bent piece by the joist fitting part and the joist support receiving part, both side surfaces of the joist are held between the side fitting piece and the anti-rotation contact piece. It is possible to have a pinching function that can be pinched and fixed by screwing, and in particular, even if the joist is formed of a thin plate material, damage such as cracks will not occur in the screwed portion, and the earthquake resistant assembly. An object of the present invention is to provide a ceiling joist fitting capable of improving attachment strength.

In order to solve the above problems, the joist mounting bracket of the present invention is provided with a plurality of C-shaped or U-shaped joist receiving base materials disposed on the ceiling of the building body with the opening side facing sideways. In the area, a plurality of joist joists having joist folded pieces with the upper ends of both joist side surfaces on the opening side being bent inward in an inverted L-shape or U-shape are arranged in a crossing manner. In the ceiling base that is mounted in a crossed manner via the ceiling joist mounting bracket, the ceiling base mounting bracket includes a base material fixing portion attached to the side surface or the opening side of the base material for receiving the ceiling joist, and the base material fixing portion. A joist fitting portion that is bent from the base material fixing portion into an L-shape to fit the opening side of the joist, and a fastening bolt that is inserted through the joist fitting portion, the lower surface area thereof and a joist support receiving part that is assembled so as to be rotatable and vertically movable and supports and receives the lower surface side of the joist bent pieces, and the joist fitting part is on the opening side of the joist and side fitting pieces bent downward from both sides of the top fitting piece so as to be in contact with both side edges of the joint to form a downward U-shape. The edge support receiving portion is bent downward into a U-shape, and has a bolt holding portion in the center of both hanging bent pieces that can be set to prevent rotation of the fastening bolt, and a vertical posture at both ends of both hanging bent pieces. and a detent abutting piece that faces the side fitting piece and is capable of restricting detent by coming into face-to-face contact with the inner surfaces of the side surfaces of both edges when rotated from the lateral position to the lateral posture, and In a state where the base material fixing portion is arranged on the base material for receiving the joist, the joist support receiving portion is placed in the joist in its vertical position and placed on the joist of the joist covered portion. By allowing the fitting set, the fastening bolt is tightened from the state in which the hoist support receiving portion is brought into face-to-face contact with the side surfaces of the joist by rotating the fastening bolt. Both ends of the upper surface are brought into upward dynamic pressure contact with the joist bent pieces so as to be clamped and fixed between the upper surface fitting pieces.

In the present invention configured as described above, the joist folded piece is clamped from both the inside and outside by the joist fitting part and the joist support receiving part to fix the joist. Even if the fastening bolt is tightened while a gap is maintained between the support receiving portion and the ceiling joist fitting portion, no deformation occurs and the ceiling joist bent piece snaps into place. Not only can it be firmly press-contacted and fixed, but also a clamping function that can be fixed by screwing both side walls between the side fitting piece and the anti-rotation contact piece, and a joist on the anti-rotation contact piece It is possible to provide a support receiving function to the bent pieces, and to increase the rigidity and strength of assembly in a state in which the outer periphery of the joist itself is reinforced. As a result, when subjected to vibration loads in the vertical and torsional directions due to an earthquake, etc., even if the load due to the ceiling's own weight is applied to the ceiling joist support receiving part, bending deformation does not occur, An integrated state is maintained by firmly sandwiching four surfaces with the joist side surfaces, and it is possible to prevent rattling and positional deviation with the joist, especially the joist formed of a thin plate material. Even so, damage such as cracks does not occur in the screwed parts on both side joists, and the seismic resistance assembly strength can be improved, and the tightening and clamping state on the four sides of the joists can be maintained for a long time. can hold. Moreover, when installing the joists, even if the joist support receiving portion is formed in a downward U-shape, by rotating from the vertical posture to the horizontal posture, the anti-rotation contact piece can be moved to both sides of the joist. The joist bent pieces can be clamped and fixed while maintaining the state of face-to-face contact with the inner surfaces of the joist side surfaces, and the screw fixing work for sandwiching both joist side surfaces can be easily performed.

It is an explanatory view showing a state in which the joist is attached to the base material for joist receiving using the joist mounting bracket according to the embodiment of the present invention, (A) is a front view, and (B) is a plan view. be. The hoisting fittings according to the embodiment of the present invention are shown, (A) is a front view thereof, and (B) is a side view thereof. A joist mounting bracket according to an embodiment of the present invention, (A) is a perspective view showing an upper member consisting of a base material fixing part and a joist fitting part, (B) consists of a joist support receiving part It is the perspective view of the upper surface side and bottom surface side which shows a lower member. It is explanatory drawing which shows the procedure which attaches a ceiling joist in the state which assembled|attached the ceiling joist mounting bracket which concerns on embodiment of this invention to the base material for ceiling joists receiving.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the ceiling joist mounting bracket will be described below in detail with reference to the drawings.
FIG. 1 is an explanatory diagram showing a state in which a joist is attached to a base material for receiving a joist according to an embodiment of the present invention. The base material 1 for receiving the ceiling joist shown in this figure includes C-shaped steel (C-shaped lip channel material) for rafters and purlins that directly constitute the ceiling of the building frame without intervening hanging bolts, or C-shaped steel for hanging It includes a U-shaped joist receiver attached to the lower end of the bolt, and the ceiling panel is screwed to the joist 2 attached to the base material 1 for the joist receiver via the joist mounting bracket 3. It constitutes the ceiling base.

The base material 1 for receiving the joist shown in the present embodiment is a C-shaped steel (a C-shaped lip groove material) for rafters and purlins, and is used to connect the frame ceiling (ceiling slab, etc.) of a gymnasium or the like and the ceiling panel. An example of construction adopted when the joist 2 is attached to a ceiling base structure with a narrow ceiling space (feet) formed between The state attached through is illustrated.

As the joist 2, a thick plate material with a thickness standard of about 1.2 mm or 1.6 mm is used, and the upper ends of both joist side surfaces 22, 22 are bent inward with the opening side facing upward. Inverted L-shaped joist bent pieces 21, 21, or inverted U-groove-shaped joist in which the upper ends of both sides of the opening side are bent inward by a thin plate material of about 0.5 mm Some have edge folding pieces 21, and in this embodiment, the one having this inverted U-shaped groove-shaped joist folding piece 21 is exemplified. The joists 2 are arranged in parallel with a predetermined interval in the ceiling so as to be orthogonal to the base material 1 for receiving the joists, and there are double joists and single joists with different width dimensions. It is supported by the joist-receiving backing material 1 via the hoisting fittings 3 having a suitable shape. A ceiling base is constructed by passing a ceiling panel between the ceiling joists 2 allocated to the ceiling and screwing it.

Next, the joist mounting bracket according to the embodiment of the present invention will be described with reference to FIGS. 2 and 3 together with the mounting state of FIG. (A) of FIG. 2 is a front view of a joist mounting bracket, and (B) is a side view thereof. FIG. 3 shows the member configuration of the joist mounting bracket, (A) is a perspective view showing the upper member consisting of the base material fixing portion and the joist fitting portion, and (B) is the lower as the joist support receiving portion. It is the perspective view of the upper surface side which shows a side member, and a bottom surface side.
As shown in these figures, the joist mounting bracket 3 includes a base material fixing portion 31 attached to the lip piece 1a on the opening side of the base material 1 for receiving the joist, and a base material fixing portion 31 to L Through a joist fitting portion 32 that is bent into a letter shape and fits the opening side of the joist 2, and a fastening bolt 34 (bolt 34a and nut 34b) that is inserted through the joist fitting portion 32. and a joist support receiving portion 33 which is assembled to the lower surface area so as to be rotatable and vertically movable and straddles both joist bent pieces 21, 21 to support and receive the lower surface side thereof. That is, the joist mounting bracket 3 connects the upper member 3a composed of the base material fixing portion 31 and the joist fitting portion 32 and the lower member 3b constituting the joist support receiving portion 33 with the fastening bolts 34. It is shipped from the factory in a connected and assembled state.

The backing material fixing portion 31 includes a front fixing piece 311 that abuts against the lip piece 1a and is fixed with screws, and both sides of the front fixing piece 311 are bent in an L shape, and corner portions thereof are attached to the lip piece 1a. The hanging groove 313 is provided with a side locking piece 312 formed by a notch. and side fitting pieces 322, 322 bent downward from both sides of the top fitting piece 321 so as to be in contact with both side edge sides 22, 22. formed into a shape.
The upper member 3a composed of the base material fixing portion 31 and the joist fitting portion 32 is integrally formed by pressing a thick plate material having a thickness of 2.3 mm. Screw holes 31a, 31a are formed at predetermined positions of the front fixing piece 311, and a screw hole 32b is formed at a position of the side fitting piece 322 facing the anti-rotation contact piece 333, respectively.

The joist support receiving portion 33 has hanging bent pieces 332, 332 that are bent downward into a U-shape via an upper surface piece 331, and an insertion hole 33a for a fastening bolt 34 is provided in the upper surface piece 331, which is the central portion of the upper surface piece 331. is bored, and both hanging bent pieces 332, 332 have a groove-shaped bolt holding portion 33b that can be set to prevent rotation of the head of the bolt 34a of the fastening bolt 34 or the nut 34b, and the entire lower member 3b is integrally pressed with a plate material thinner than the upper member 3a with a plate thickness of 1.6 mm, and the lower surface area of the upper surface fitting piece 321 through the fastening bolt 34 (U-shaped inner surface area of the joist fitting portion 32) It is temporarily assembled in a state of being connected so as to be rotatable and vertically movable.
The bolt holding portion 33b is formed in a U-shaped notched groove, and the width of the groove is wider than the width of one side of the head of the bolt 34a of the fastening bolt 34 or the width of one side of the nut 34b, and is a groove capable of preventing rotation. It has a width, and the fastening bolt 34 can be arranged and set from the opening side of the notch groove.

Both ends of the upper surface piece 331 are notched in a substantially V shape so as to be inserted into the inverted U-shaped grooves of the joist bent pieces 21 and 21 to support and receive the joist 2, and each hanging fold is made. Ceiling support receiving grooves 33c formed at four locations of the curved pieces 332, and both hanging bent pieces 332, 332 at both ends, the joist supporting receiving portion 33 is transformed from a vertical posture to a horizontal posture. Anti-rotation abutment pieces 333, 333 are formed that face the side fitting piece 322 and come into face-to-face contact with the inner surfaces of both the side edges 22, 22 to prevent rotation when they are rotated.

In other words, the anti-rotation contact pieces 333, 333 are provided at opposite ends of the hanging bent pieces 332, 332 so that the posture can be changed from the vertical posture to the horizontal posture by rotating clockwise in one direction. are bent in the same direction, and the upper end surface thereof is extended and bent so as to be flush with the upper end surface of the joist support receiving groove 33c. The function to support and receive the joist 2 by inserting it into the shaped groove together with the joist support receiving groove 33c, and the side fitting piece 322 are pressed by fixing both joist side surfaces 22, 22 with drill screws. It also has a clamping function. Even when the nut 34b is set on the bolt holding portion 33b, if the bolt 34a is rotated, the joist support receiving portion 33 can be rotated from the vertical posture to the horizontal posture. It should be operated.

Next, a procedure for mounting the joist mounting bracket 3 according to the embodiment of the present invention will be described with reference to FIGS. 4(A) to 4(E). As shown in these figures, first, the hooking groove 313 of the backing material fixing portion 31 is inserted into the lip piece 1a from the opening side of the backing material 1 for receiving the ceiling joist, and set to be hooked. A joist support receiving portion 33 (see FIG. 2) is set in a vertical posture by rotating the fastening bolt 34 (see FIG. 2A). From this set state, the joist 2 is brought into contact with the bottom surface of the joist support receiving portion 33 from the opening side so as to swallow the joist support receiving portion 33 (see FIG. (B)), and by rotating the fastening bolt 34, the joist support receiving After the portion 33 is set in a horizontal posture with the anti-rotation contact piece 333 in contact with the inner surface of the joist side surface 22, the joist 2 is lowered by its own weight, so that the joist folded piece 21 is set in a suspended state in which the inverted U-shaped groove is inserted along the inclination of the joist support receiving groove 33c (see FIG. (C)).

Next, by tightening the nut 34b of the fastening bolt 34, the joist support receiving portion 33 and the joist support receiving portion 33 are moved upward to move the joist bending piece 21 to the upper surface fitting piece 321 and the joist support receiving portion 33. (See FIG. (D)). At the time of this operation, the joist support receiving portion 33 has a predetermined gap between the anti-rotation contact piece 333 and both joist side surfaces 22, 22 in order to allow the rotation from the vertical posture to the horizontal posture. The rotational operation range is set with an allowable range of about 90 degrees plus 1 or 2 degrees shown in FIG. The upper surface fitting piece 321 of the joist fitting part 32 and the upper surface piece 331 of the joist support receiving part 33 contact with the inner surface of the joist side surface 22 in an inclined state. The joist bent pieces 21 can be strongly pressed against each other and clamped and fixed in a state in which a gap is held between them and a so-called snap is applied. While maintaining this sandwiched state, both side edge sides 22, 22 are securely sandwiched between the side fitting piece 322 and the anti-rotation contact piece 333 by screws. With the outer periphery of the rim 2 itself reinforced, the assembling rigidity can be increased.

After that, the front fixing piece 311 is screwed to the lip piece 1a through the screw hole 31a to complete the mounting work. In other words, when fixing both side edge sides 22, 22 between the side fitting piece 322 and the detent abutting piece 333 by screwing, the lower member 3b made up of the lower edge support receiving portion 33 is attached to the base material. The upper member 3a consisting of the fixing portion 31 and the hoisting fitting portion 32 is made of a thicker plate material than the upper member 3a, and the whole is molded in a downward U-shape. The screw holes 32b drilled in the side fitting pieces 322 are made through the pieces 332, 332, and even if they are firmly tightened and fixed, deformation such as buckling is prevented from occurring between them. , so that even if the anti-rotation contact piece 333 is screwed in a state where it does not come into contact with both side edges 22, 22, the drill screw is inclined through the screw hole 32b. The anti-rotation contact piece 333 is drawn by being screwed into the joint, and can be clamped and fixed in a state of being brought into contact with the inner surfaces of the side walls 22, 22 on both sides.

In the embodiment of the present invention configured as described, now, in the construction of the ceiling base, the joist 2 is attached to the lower surface area of the base material 1 for receiving the joist via the joist mounting bracket 3. The joist mounting bracket 3 according to the present invention includes a base material fixing portion 31 attached to the side surface or the opening side of the base material 1 for receiving the ceiling joist, and is bent from the base material fixing portion 31 into an L shape. The joist fitting portion 32 for fitting the opening side of the joist 2 and the fastening bolt 34 inserted through the joist fitting portion 32 are assembled to the lower surface area so as to be rotatable and vertically movable. It is provided with a joist support receiving portion 33 that straddles both joist edge bent pieces 21 and 21 and supports and receives the lower surface side thereof, and the joist covering portion 32 covers the opening side of the joist 2. It has a piece 321 and side fitting pieces 322, 322 which are bent downward from both sides of the top fitting piece 321 so as to come into contact with both side edges 22, 22, forming a downward U-shape. The joist support receiving portion 33 is bent downward into a U-shape, and in the center of both hanging bent pieces 332, 332, a bolt holding portion 33b that can be set to prevent rotation of the fastening bolt 34, and both hanging bent pieces 332, 332. At both ends of the pieces 332, 332, when the vertical posture is rotated to the horizontal posture, the side fitting piece 322 is opposed to the inner surface of the both edge side surfaces 22, 22, so that the rotation can be prevented and regulated. While being formed with stop contact pieces 333, 333, with the base material fixing part 31 arranged on the base material 1 for receiving the ceiling joist, the joist support receiving part 33 is placed in its vertical posture, By allowing the arrangement inside the joist 2 and the fitting set of the joist fitting part 32 to the joist 2, the joist support receiving part 33 can be rotated by the fastening bolt 34 (bolt 34a) While holding the anti-rotation contact piece 333 in contact with the inner surfaces of both joist side surfaces 22, 22, the tightening operation of the fastening bolt 34 (nut 34b) tightens the upper surface both ends (the joist support receiving groove 33c The anti-rotation abutting piece 333) is brought into dynamic pressure contact with the joist bent pieces 21, 21 so as to be sandwiched and fixed with the top fitting piece 321. As shown in FIG.

With this configuration, the joist folded piece 21 is clamped from both the inner and outer sides by the joist fitting part 32 and the joist support receiving part 33 to fix the joist 2, while the joist supporting receiving part 33, even if the fastening bolt 34 (nut 34b) is tightened with a gap between it and the joist fitting part 32, the snap is applied without causing any deformation. Not only can the bent edge pieces 21, 21 be strongly pressed against each other and fixed by pinching, but also both edge side surfaces 22, 22 are screwed between the side fitting piece 322 and the anti-rotation contact piece 333. It is possible to provide both a fixable press-contact clamping function and a support receiving function to the joist bent piece 21 in the anti-rotation contact piece 333, so that the joist 2 itself can be reinforced with its outer periphery, and the assembly rigidity and strength can be increased. can be enhanced.

As a result, when a vibration load is applied in a vertical direction or a torsional direction due to an earthquake or the like, even if a load due to the weight of the ceiling itself is applied to the ceiling joist support receiving portion 33, bending deformation does not occur, and both joist bent pieces 21 , 21 and both joist side surfaces 22, 22 are firmly sandwiched to maintain an integrated state, and it is possible to prevent rattling and positional deviation with the joist 2, especially thin Even if the joist 2 is formed of a plate material, damage such as cracks does not occur in the screwed portions on both joist side surfaces 22, 22 due to the collision action with the drill screw, and the seismic resistance assembly strength is improved. It is possible to hold the tightening clamping state on the four surfaces of the joist 2 for a long period of time. Moreover, when attaching the joist 2, even if the joist support receiving portion 33 formed in a downward U-shape is rotated from the vertical posture to the horizontal posture, the anti-rotation contact pieces 333, 333 The joist bent pieces 21, 21 can be clamped and fixed while maintaining the state of facing and abutting on both the joist edge side surfaces 22, 22, and the screw fixing work for sandwiching the both joist edge side surfaces 22, 22 is also possible. can be easily done.

Further, the side fitting pieces 322, 322 and the anti-rotation contacting pieces 333, 333 are fixed with screws on both sides of the joist side surfaces 22, 22. It is possible to assemble and fix in a state where the joist fitting part 32 and the joist support receiving part 33 firmly press and hold, and the outer peripheral surface of the joist 2 itself is reinforced with assembly rigidity strength. is integrated, and even if it receives a vibration load in the vertical direction or torsional direction, it is possible to prevent rattling and positional deviation with the ceiling joist 2, and the clamping state can be preferably maintained. 32 and the joist support receiving portion 33 are not deformed, and the seismic resistance assembly strength can be improved.

In addition, since the upper ends of the anti-rotation contact pieces 333, 333 are also used as support receiving pieces for supporting and receiving the joist bent pieces 21, as the joist support receiving portion 33 is moved upward, The joist 2 can be supported by entering into the inverted U-shaped grooves of the joist bent pieces 21, 21 together with the joist support receiving groove 33c, and by tightening the fastening bolt 34, the joist 2 is supported and received with a wide area. Even if the joist 2 is vibrated in the longitudinal direction, it can be jointly supported and held with the same width as the vertical width of the joist fitting part 32, and the fastening bolt 34 , the vibration load can be distributed and supported. As a result, it is possible to reinforce the vibration load in the longitudinal direction to increase the assembly rigidity strength for earthquake resistance, the earthquake resistance function in the longitudinal direction and the inclined direction of the ceiling joist 2 is enhanced, and the clamping function to the ceiling joist 2 is improved. It is possible to prevent the occurrence of backlash and positional deviation between the two without being damaged.

In addition, at both ends of the upper surface of the joist support receiving portion 33, when the joist bent pieces 21, 21 are inverted U-shaped grooves, they are inserted into the inverted U-shaped grooves to support the joist 2. Since the joist support receiving grooves 33c that are notched in a substantially V-shape are formed to receive the joists, the joist support receiving parts 33 can be lowered by the self weight of the joists 2 in a state of being set in a horizontal posture. Then, it can be inserted into the inverted U-shaped groove along the inclination of the joist support receiving groove 33c, and the anti-rotation contact piece 333 is brought into face-to-face contact with the inner surface of the joist side surface 22 following the insertion operation. It can be set in a suspended state.

Further, when the base material 1 for receiving the ceiling joist is a lip channel material, the base material fixing portion 31 is formed in a U-shape when viewed from above, and its both side bent portions (the front fixing piece 311 and the side locking piece 312) are provided with locking grooves 313, 313 that are inserted and locked into the lip piece 1a of the joist receiving base material 1, so that they can be temporarily assembled to the joist receiving base material 1. Therefore, in the previous step of fixing the front fixing piece 311 to the lip piece 1a with screws, the joist bent pieces 21, 21 are clamped and fixed between the joist fitting part 32 and the joist support receiving part 33. , the lip piece 1a can be slid to perform positioning adjustment.

1 joist receiving base material 1a lip piece 2 joist 21 joist folded piece 22 joist side surface 3 joist mounting bracket 3a upper member 3b lower member 31 base material fixing portion 311 front fixing piece 312 side locking piece 313 Hanging groove 31a Screw hole 32 Ceiling fitting part 321 Upper surface fitting piece 322 Side fitting piece 32a Insertion hole 32b Screw hole 33 Ceiling support receiving part 331 Upper surface piece 332 Hanging bent piece 333 Contact piece 33a Insertion hole 33b Bolt holding portion 33c Ceiling support receiving groove 34 Fastening bolt 34a Bolt 34b Nut

Claims (6)

In the lower surface area of a plurality of C-shaped or U-shaped joist receiving base materials arranged with the opening side facing sideways on the ceiling of the skeleton, the upper ends of both joist side surfaces that are the opening side, A ceiling that is installed in a crossed manner via a ceiling joist mounting bracket by arranging a plurality of ceiling joists having joist folded pieces that are bent inward in an inverted L-shape or U-shape in an intersecting manner. on the ground,
The joist mounting bracket includes a base material fixing portion attached to the side surface or the opening side of the base material for receiving the ceiling joist, and a base material fixing portion bent in an L shape from the base material fixing portion to form the opening of the joist. It is assembled to the lower surface area so as to be rotatable and vertically movable via a hoisting fitting portion that fits the side and a fastening bolt that is inserted through the hoisting fitting portion, and is attached to the both joist bent pieces. A joist support receiving portion that straddles and supports and receives the lower surface side thereof,
The joist fitting part has a top fitting piece covering the opening side of the joist and a side fitting piece bent downward from both sides of the top fitting piece so as to be in contact with both joist side surfaces. to form a downward U-shape,
The joist support receiving portion is bent downward into a U-shape, and at the center of both hanging bent pieces, a bolt holding portion that can be set to prevent rotation of a fastening bolt, and at both ends of both hanging bent pieces, A detent abutment piece is formed so as to face the side fitting piece and contact the inner surfaces of both side edges to prevent detent when rotated from the vertical posture to the lateral posture. ,
In a state in which the base material fixing portion is arranged on the base material for receiving the joist, the joist support receiving portion is arranged in the vertical position inside the joist and the joist of the joist covered portion. By allowing the inset set to
From the state in which the anti-rotation contact piece is brought into face-to-face contact with the side surfaces of both joists by rotating the fastening bolt, both ends of the upper surface of the joist support receiving portion are folded by tightening the fastening bolt. A joist mounting bracket characterized in that it is constructed so as to be clamped and fixed between the curved piece and the upper surface fitting piece by being brought into upward dynamic pressure contact with the curved piece. 2. The ceiling joist fitting according to claim 1, wherein said side fitting piece and said anti-rotation contact piece are fixed with screws so as to sandwich said ceiling joist side surface. 3. A ceiling joist fitting according to claim 1, wherein the upper end portion of said anti-rotation contact piece is also used as a support receiving piece for supporting and receiving said joist bent piece. In any one of claims 1 to 3, when the joist bent piece is an inverted U-shaped groove, it is inserted into the inverted U-shaped groove at both ends of the upper surface of the joist support receiving portion. A joist mounting bracket characterized in that a joist support receiving groove is formed so as to support and receive the joist. In any one of claims 1 to 4, when the base material for receiving the joist is a lip channel material, the base material fixing portion is formed in a U-shape when viewed from above, and at both side bent portions, A joist attachment characterized by providing a locking groove that is inserted and latched to a lip piece of the base material for joist receiving, and is configured to be temporarily assembled to the base material for joist receiving. hardware. In the lower surface area of a plurality of C-shaped or U-shaped joist receiving base materials arranged with the opening side facing sideways on the ceiling of the skeleton, the upper ends of both joist side surfaces that are the opening side, A plurality of joist joists having joist folded pieces bent inward in an inverted L-shape or U-shape are arranged in an intersecting manner and attached via a joist mounting bracket. a method,
The joist mounting bracket is bent into an L shape from the base material fixing portion attached to the side surface or opening side of the base material for receiving the joist, and the base material fixing portion to form the opening of the joist It is assembled to the lower surface area so as to be rotatable and vertically movable via a hoisting fitting portion that fits the side and a fastening bolt that is inserted through the hoisting fitting portion, and is attached to the both joist bent pieces. It is formed with a joist support receiving portion that straddles and supports and receives the lower surface side thereof,
The joist fitting part has a top fitting piece covering the opening side of the joist and a side fitting piece bent downward from both sides of the top fitting piece so as to be in contact with both joist side surfaces. to form a downward U-shape,
The joist support receiving portion is bent downward into a U-shape, and at the center of both hanging bent pieces, a bolt holding portion that can be set to prevent rotation of a fastening bolt, and at both ends of both hanging bent pieces, anti-rotation abutting pieces that face the side fitting pieces and can come into face-to-face contact with the inner surfaces of both side edges to restrict rotation when rotated from the vertical position to the horizontal position,
With the base material fixing portion temporarily assembled and attached to the base material for receiving the joist, the joist support receiving portion is set in a vertical position by rotating the fastening bolt,
After the joist is fitted into the joist fitting portion with the joist support receiving portion inserted from the opening side, the rotation stop contact piece is moved to both joist edge sides by rotating the fastening bolt. Face-to-face contact with the surface, and the joist folded piece is supported by both ends of the upper surface of the joist support receiving portion by its own weight,
After that, by tightening the fastening bolt, the joist support receiving portion is moved upward, and the joist bent piece is clamped and fixed between the both ends of the upper surface and the upper surface fitting piece. A method of installing a roving, characterized by:

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