JPH0743189U - Ceiling base lattice frame connection structure - Google Patents

Abstract

(57) [Abstract] [Purpose] With respect to a right-angled joint structure of a ceiling base lattice frame in the system ceiling method, it is possible to easily and securely insert and remove the cross T-bars between the main T-bars. [Structure] The main T-bar (1) has two standing claws (6, 7) cut and raised on its standing wall (3), cut and raised openings (10, 11) at its base, and standing claws (6, 7). ) Has a locking portion (A) composed of a locking projection (5) cut and raised at right angles to each other, and the cross T-bar (20) has its standing wall (2).
The fitting piece (2) obtained by bending the extending piece part (22) from (1) at a right angle.
3) and a locking tongue piece (25) obtained by cutting and raising one side edge of the engaging cutout portion (24) and the fitting piece (23) provided on the front end edge thereof.
By having the fitting part (B) made of and fitting the fitting part (B) into the locking part (A), the main T-bar (1) and the cross T-bar (20) are connected at a right angle. .

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a ceiling base grid frame for supporting ceiling plates such as ceiling plates suspended from a building base material in the system ceiling method, and more specifically, a right-angled joint structure of a main T bar and a cross T bar forming the ceiling base frame. Regarding the improvement of.

[0002]

[Prior art]

 In the system ceiling method, a ceiling base grid frame is usually hung along the ceiling ground surface, and equipment such as lighting, air conditioning, and disaster prevention is placed at the required locations while the ceiling plate is attached to the finished ceiling surface. Is formed. The above-mentioned ceiling base lattice frame is provided between a plurality of long main T-bars which are supported in parallel by a large number of hanging bolts arranged vertically on the ceiling ground and are installed in parallel at predetermined intervals, and between the parallel main T-bars. It is composed of a number of cross T-bars that are bridged at right angles. Both the main T-bar and the cross T-bar are generally made of a material having a substantially inverted T-shaped cross section, which is usually formed by bending and pressing a steel plate.

In a conventional right angle connecting structure of a main T-bar and a cross T-bar, a locking portion formed by cutting and raising the main T-bar on a vertical wall has a piece extending from the vertical wall at the end of the cross T-bar. The one-piece fitting method in which a fitting piece bent at a right angle is fitted is widely adopted. FIG. 5 is a perspective view showing an essential part of a conventional one-sided fitting type coupling structure (see Japanese Utility Model Laid-Open No. 2-99113), in which the main T-bar 1 is an arch shape formed by cutting and raising the standing wall 3 cotton. The cross T-bar 20 has a locking portion A composed of a receiving portion 31, a retaining projection 32, and a rotation-preventing projection 33, and the cross T-bar 20 extends from a standing wall 21 at the end thereof and falls into a fitting piece 41 bent at a right angle. The cross T-bar 20 is connected to the side surface of the main T-bar 1 at a right angle by the fitting protrusion B having the locking projection 42 and the rotation-stop groove 43 at the tip edge thereof.

On the other end of the cross T-bar 20, a similar fitting portion bent in the opposite direction is provided, and the standing wall surface of the main T-bars arranged in parallel and adjacent to each other corresponds to this fitting portion. By providing the same locking part as above and obtaining the same right-angled connection structure, the two parallel main T-bars are bridged and connected by the cross T-bar, and the grid-like structure is formed by repeating this connecting work. A ceiling base frame is configured, and a ceiling plate, a lighting device, and the like are erected on a lattice surrounded by the main T-bar 1 and the cross T-bar 20 to obtain a finished ceiling surface.

[0005]

[Problems to be solved by the device]

 When the cross T-bar is bridged between the two main T-bars suspended in parallel from the ceiling ground by the conventional one-sided fitting method as described above, both ends of the cross T-bar are bent at right angles in opposite directions. With respect to each of the fitting portions, the tip of each fitting portion performs a rotary insertion operation in which the locking portions of the two main T-bars that are parallel to each other move outward from the mounting position of the cross T-bar. However, due to this operation, the parallel spacing of the main T-bars is affected by the force that expands by the tips of both fittings of the cross T-bars, and therefore the main T-bars are suspended and supported. Was desired to be able to swing appropriately.

Further, even in this case, as the cross T-bars are successively bridged and connected, the parallel spacing of the main T-bars is fixed, and when the cross T-bars are subsequently bridged, the fitting portion of the cross T-bars is fixed. Unreasonable force is easily applied to the base part of the to distort, a gap is often created in the connecting part, the parallel spacing of the main T-bars exceeds the specified value, the ceiling plate between the main T-bar and the cross T-bar, etc. There was a problem that the support surface of was not flush. Also, after forming the ceiling base lattice frame, it was extremely difficult to remove and install the cross T-bar in the middle part, and maintenance of the ceiling was troublesome.

[0007]

[Means for Solving the Problems]

 The inventor of the present invention has found that the problem in the previous term in the connecting structure of the ceiling underframe composed of the main T-bar and the cross T-bar is that the engaging portion of the main T-bar and the fitting portion bent at a right angle to the end of the cross T-bar. The present invention has been achieved by considering what can be solved by shortening the length dimension in the direction of fitting and coupling with.

That is, according to the present invention, in the rectangular joint structure of the main T-bar and the cross T-bar that constitute the ceiling base lattice frame, the main T-bar is cut and raised on one side of the standing wall, and two standing uprights which are vertically parallel and opposed to each other are projected. The cross T has a locking portion composed of a claw and a locking projection which is close to one end of the standing claw and is orthogonal to the standing claw and cut and raised with a width narrower than the facing interval between the two standing claws. The bar is a fitting piece having a width that can be fitted to the facing space between the two standing pawls of the locking part, which is formed by bending the extending part from the end of the standing wall at a right angle, and the locking part at the front end edge of the locking part. An engaging notch having a width that allows the locking projection to be fitted therein and an opening formed by elastically fitting into one of the cut-and-raised openings of the upright claw base of the locking portion provided on one side edge of the fitting. It has a fitting part consisting of a slanting cut-and-raised locking tongue that can engage with the trailing edge. The gist is a combined structure of a ceiling base lattice frame, which is characterized in that

In the above description, the two standing upright pawls, which are cut and raised and are parallel to each other on one side of the standing wall of the main T-bar, have upper and lower edges of the fitting piece bent at the end of the cross T-bar adapted to fit and fit. Each of the standing claws has a cut-and-raised opening on the standing wall surface between the standing claws. In addition, a locking projection that is close to one end of the standing claw and is perpendicular to the standing claw and cut and raised with a width narrower than the facing interval between the two standing claws is used to engage the tip of the fitting piece of the cross T bar. It is abuttingly fitted into the notch, and the fitting piece is positioned and vertically locked by the vertical locking surface.

The fitting piece obtained by bending the extending piece part from the end of the standing wall of the cross T-bar at a right angle is a size that fits between the two standing claws serving as the locking part of the main T-bar and its front end edge. The engaging tongue has an engaging notch for engaging and engaging with the engaging protrusion described above, and the inclined tongue is inclined and raised so as to sequentially project outward toward the rear at either the upper edge or the lower edge of the base. This locking tongue has two standing claws with the protruding end of the locking tongue engaging the fitting part of the cross T-bar to the locking part of the main T-bar. The fitting portion prevents the cut-and-raised opening of the base portion from engaging with the trailing edge of the opening, and the fitting portion from being separated from the locking portion. Therefore, it is necessary that the cut-and-raised width of the locking tongue is less than or equal to the cut-and-raised opening of the standing claw, and the protruding dimension of the tip of the locking tongue outward is less than or equal to the thickness of the T-bar standing wall. is there.

[0011]

[Action]

 The coupling structure of the present invention has two standing claws on one side of the standing wall of the main T-bar, which are cut and raised from the standing wall, and which are vertically opposed to each other, and a vertical standing surface close to one side end thereof. An engaging portion composed of an engaging projection piece having a size smaller than the space between the two standing claws is formed, and an engaging piece bent at a right angle at the end of the other cross T-bar and an engaging notch provided at the front end edge of the engaging piece. And a fitting portion composed of a locking tongue provided on one side edge of the base of the fitting piece is formed. The main T-bar is bent at a right angle to the end of the cross T-bar with respect to the locking portion on one side of the standing wall. When the fitting portion is fitted, the upper and lower edges of the fitting piece are clamped by the two standing claws, and the tip of the fitting piece is abutted and locked to the locking projection piece to prevent vertical swinging. The locking tongue engages with the trailing edge of the cut-and-raised opening of the upright pawl to form a stable right-angled coupling structure that cannot be separated.

Further, since the locking projection piece of the locking portion of the main T-bar is formed as a vertical upright surface by cutting and raising, the engagement notch provided on the front end edge of the fitting piece of the cross T-bar is small. Sufficient locking strength is obtained at the depth of cut, and the locking tongue at one side edge of the base of the fitting piece fits into the cut-and-raised opening edge formed with the upright pawl, and therefore the locking portion. The dimension of the main T-bar, which is composed of the and the fitting portion, that produces the fitting coupling action along the longitudinal direction of the standing wall can be made significantly smaller than that of the conventional fitting coupling structure. The cross T-bar at any position can be easily removed by pushing up one locking tongue that is engaged with the upright claw cutting and raising opening edge and separating the fitting piece from the locking portion. Its reattachment is also extremely easy.

[0013]

【Example】

 1 to 4 show an embodiment of the present invention. FIG. 1 is a perspective view of a main part of a right angle coupling structure in a separated state, and FIG. 2 is a main T-bar in the direction of the arrow in FIG. Sectional view, FIG. 3 is a sectional view of the cross T-bar in the direction of the arrow of FIG. 1, and FIG. 4 is a plan view in which the middle of the length of the cross T-bar is omitted. The main T-bar 1 is made of a metal plate-shaped material having a substantially inverted T-shaped cross section having an enormous head 2 on the upper portion of a standing wall 3 and horizontal flanges 4 extending on both sides at the lower portion. The locking projection 5 is perpendicular to the two standing claws 6 and 7 that are parallel to each other and are vertically protruded by cutting and raising, and are narrower than the facing interval between the standing claws 6 and 7. Is provided with a locking portion A. Reference numerals 10 and 11 denote openings formed at the base of each standing claw formed by cutting and raising the standing claws 6 and 7. The openings 10 and 11 are located between the standing claws 6 and 7.

The cross T-bar 20 is obtained from a metal plate molding material having a substantially inverted T-shaped cross section similar to that of the main T-bar 1 described above. A fitting piece 23 having a width that can be fitted into the bent upright claws 6 and 7 of the locking portion A at an opposing interval and a width that can fit the locking projection 5 of the locking portion A to the front end edge thereof. An inclined cut-and-raised tongue piece 25 that can be elastically fitted into the opening 11 of the base of the upright pawl 7 provided at the lower edge of the engaging cutout portion 24 and the fitting piece 23 and engaged with the rear edge 15 of the opening. And a fitting portion B consisting of The vertical dimension of the extension piece 22 is larger than that of the fitting piece 23 to enhance the strength of the base of the fitting portion B, and steps 28 and 29 for restricting the fitting position are provided on the base end side of the locking tongue piece 25. In addition, a reinforcing rib 27 is formed by pressing over the standing wall 21, the extending piece portion 22, and the locking tongue piece 25.

As shown in FIGS. 1 and 2, the main T-bar 1 is locked to one side of the standing wall 3 in order to connect separate cross T-bars 20 and 20 ′ on both sides thereof in an orthogonal straight line. As shown in FIG. 4, the cross T-bar 20 is provided with an engaging portion A'under the same condition at a predetermined distance from the engaging portion A on the portion A and the other side. Under the same conditions as the part B, the other end is provided with a fitting part B'which is bent at a right angle in the opposite direction. Due to the fitting of the locking portion A and the fitting portion B, a stable right-angled connection structure in which the cross T-bar 20 cannot be detached from the main T-bar 1 by the above-described action is obtained. By fitting the fitting portion B ′ at the end to the locking portion A ′ of the main T bar provided adjacent to and parallel to the main T bar 1, both main T bars are bridged and coupled by the cross T bar. Reference numerals 10 ', 11', and 5'in FIG. 1 are cut-and-raised openings and locking projections of the standing claws vertically opposed to each other of the locking portion A'cut and formed on the other side of the standing wall 3 of the main T-bar 1. Is.

[0016]

[Effect of device]

 The connecting structure of the ceiling base lattice frame of the present invention is composed of the standing claws formed by cutting and raising the locking part provided on the standing wall of the main T-bar, and the vertical locking projections close to one end thereof. And a fitting portion vertically bent at the end of the cross T-bar that fits with the fitting piece having a front end edge engaging cutout portion that abuts against the locking projection piece and the above-mentioned one side edge of the fitting piece. Since the locking tongue that engages with the cut-and-raised opening edge of the standing claw of the locking portion is provided, it is possible to reduce the dimension in the longitudinal direction of the main T-bar of the fitting and coupling structure of the both, so that the parallel adjacent The fitting and connection of the cross T-bar between the two main T-bars provided and the detachment thereof can be facilitated without difficulty. Thus, it can contribute to the construction of the system ceiling method and maintenance of the finished ceiling surface.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a main part of an embodiment.

FIG. 2 is an enlarged cross-sectional view of a main T-bar in the direction of the arrow in FIG.

FIG. 3 is an enlarged cross-sectional view of a cross T bar in a first direction of the Roro line.

FIG. 4 is a plan view of a cross T bar.

FIG. 5 is an exploded perspective view showing a conventional coupling structure.

[Explanation of symbols]

 1 Main T Bar 2 Head 3 Standing Wall 4 Flange 5 Locking Protrusion 6 Standing Claw 7 Standing Claw 10 Cutting and Raising Opening 11 Cutting and Raising Opening 15 Opening Rear Edge 20 Cross T Bar 21 Standing Wall 22 Extending Piece 23 Fitting Piece 24 Engagement Mating notch 25 Locking tongue 27 Reinforcing rib 28 Step 29 Step

Claims (1)

[Scope of utility model registration request] 1. In a right angle connecting structure of a main T-bar (1) and a cross T-bar (20) constituting a ceiling base lattice frame, the main T-bar (1) is cut and raised on one side of its standing wall (3). Two protruding claws (6, 6)
7) and one edge of the standing claws (6, 7), and cut and raised at a width orthogonal to the standing claws (6, 7) and narrower than the facing interval between the two standing claws (6, 7). The cross T-bar (20) has a locking portion (A) composed of a locking projection (5), and the cross T-bar (20) is formed by bending the extending piece (22) from the end of the standing wall (21) at a right angle. A fitting piece (23) having a width capable of fitting and fitting into the facing interval of the two standing claws (6, 7) of the stop portion (A), and a locking projection piece of the locking portion (A) provided on the front end edge thereof. Engaging notch (24) with a width capable of fitting and fitting (5) and cut-and-raising opening at the base of the standing claws (6, 7) of the locking part (A) provided at one side edge of the fitting piece (23). It has a fitting part (B) consisting of an inclined cut-and-raised locking tongue (25) which can be elastically fitted into any of (10, 11) and engage with the opening rear edge (15). To be one Coupling structure of the ceiling underlying lattice frame and butterflies.