JPS62337Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a T-shaped fitting for a system ceiling.

When forming ceilings in modern concrete buildings, it is called a system ceiling, and ceiling panels of a standard size, for example, several tens of centimeters square, are simply mounted on metal fittings arranged in a lattice shape suspended from beams. A technique is being used to form a ceiling by placing

The metal fittings used for this system ceiling have an almost T-shaped cross section, and the ceiling plate is placed on the surface corresponding to the horizontal bar, but considering the convenience of manufacturing and handling, the metal fittings are adjusted in the longitudinal direction as appropriate. It is necessary to use them in conjunction. However, with conventional T-shaped fittings, the connecting part is weak and the connection is uncertain, so there is a risk of a major accident such as the connection coming undone and the entire ceiling collapsing, and the structure is too complex, making it expensive to manufacture. The disadvantages were that it was expensive and took time to assemble.

For example, in the device described in Japanese Utility Model Publication No. 45-9784, a protruding piece is formed at the end of the main body corresponding to the T-shaped vertical bar part, and both ends of the protruding piece are attached to the side edges of the protruding piece on the tip side of the protruding piece. A notch is formed in parallel with the side edge of the protrusion and faces toward the distal end of the protrusion, and is connected from the edge of the elongate hole to form a notch that is parallel to the side edge of the protrusion and faces toward the distal end of the protrusion. Engaging tongues are formed to hold the upper and lower edges of the notch, and protrusions into which long holes are inserted are formed at the back of these engaging tongues. The area of the notch is large, and as a result, the strength of the protrusion is weakened. In addition, in order to maintain a stable connection at all times, the hooking tongue that holds the notch from the inside and the protruding piece must be machined with great precision. If the clamped protrusion is precisely machined to prevent it from wobbling, the tip of the protrusion cannot get over the protrusion, so the protrusion must have a recess, which requires extra machining and the recess There was a risk that the engagement between the notch and the protrusion would become uncertain due to the presence of this.

This invention provides a new system ceiling T-shaped fitting that eliminates the drawbacks of the prior art.

In order to achieve the above-mentioned object, this invention uses a bar-shaped member having an approximately T-shaped cross section, and the part corresponding to the T-shaped horizontal bar is formed as a ceiling mounting part on which a ceiling board is to be mounted. At both ends of the main body corresponding to the T-shaped vertical bar part, there are insert engagement pieces that protrude in the longitudinal direction, and a pair of upper and lower insert engagement pieces located at the base of the insert engagement pieces and spaced apart from each other by approximately the same width as the insert engagement pieces. A holding protrusion is provided between the holding claws, and a locking protrusion with an upright portion located on the back side is provided by cutting and processing the main body between the holding claws, and the locking protrusion is inserted into the engaging piece. A locking hole into which the protrusion is fitted is provided, and a bead portion is formed between the locking hole and the locking protrusion, and at least a portion of the bead portion is inserted into the engagement piece. At least one insertion hole having a width approximately equal to the thickness of two insertion engagement pieces is provided at the location.

FIG. 1 is a perspective view showing one end of a T-shaped fitting showing an embodiment of this invention, and the portion corresponding to the T-shaped horizontal bar of the T-shaped fitting shown as 2 is placed on a ceiling plate. The body portion 22, which is a T-shaped vertical bar portion, has insert engagement pieces 23 projecting from both ends thereof (only one end is shown in FIG. 1). A locking hole 24 is provided in a penetrating state approximately in the center of this insertion engagement piece 23, and a bead portion 25 is provided at the base of the locking hole 24 to increase the bending rigidity of the cross section.
is formed.

At the base of the insertion engagement piece 23, there is also a pair of holding claws 2 for receiving the insertion engagement piece 23.
6, 26 are formed, and the holding claws 26, 2
6, the plate surface of the main body 22 is held between the holding claws 26
A semicircular locking protrusion 27 is formed by cutting and raising it on the same side as the protruding side (that is, it protrudes toward the front of the page).
will be provided.

At least one insertion hole 29 is formed in the main body 22 at an appropriate location in the longitudinal direction, and a hanging hole 28 for hanging the T-shaped fitting is also provided at the upper edge of the main body 22.

When connecting this T-shaped fitting 2 in the longitudinal direction,
The two metal fittings are matched along the longitudinal direction, and each insertion engagement piece 23 is inserted into the holding claw portions 26, 26 of the other side, respectively.

Since there is a locking projection 27 between the holding claws 26, 26, the tip of the insertion engaging piece 23 hits this at first and cannot be inserted any further. However, the end 27A of the locking projection 27 is circular, and the protrusion relative to the plate surface of the main body 22 gradually increases from this end 27A, so that the insertion engaging piece 23 can be inserted further.
The tip of the locking projection 27 is slightly curved.
When the locking projection 27 slides along the surface of the fastener 24 and reaches the locking hole 24, the entire locking projection 27 is instantly fitted into the locking hole 24 by the elastic force caused by the bending, thus achieving a secure and firm connection between the two T-shaped fittings 2, 2. This state is clearly shown in FIG.

The T-shaped fitting 2 of this invention has an insertion engagement piece 23,
They are connected in the longitudinal direction and the orthogonal direction using the holding claws 26 and the insertion holes 29, and are combined in a lattice shape as shown in FIG. Therefore, the ceiling plate 3 has a ceiling plate mounting portion 21 in each of these lattice portions.
You can place it on top.

As detailed above, the T-shaped fitting of this invention (i)
Simple structure and low manufacturing cost; (ii) engagement between the insertion engagement piece and the holding claw, engagement between the locking hole and the locking protrusion, and furthermore, the bead part can be inserted into the engagement piece and the holding claw; (iii) For the same reason, on-site work for connection and assembly is easy.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of this invention, Fig. 2 is a plan view showing the assembled state, and Fig. 3 is an enlarged cross section showing the engagement state of the engagement hole of the insertion engagement piece and the engagement protrusion. It is a diagram. 21...Ceiling plate placement part, 22...Main body part, 23
...Insert engagement piece, 24...Lock hole, 26...
Holding claw portion, 27...locking protrusion, 29...insertion hole.

Claims (1)

[Claims for Utility Model Registration] A rod-shaped member having an approximately T-shaped cross section, the portion corresponding to the T-shaped horizontal bar portion is formed as a ceiling mounting portion 21 on which a ceiling board is placed, and the T-shaped vertical At both ends of the main body 22, which corresponds to a rod, there are insertion engagement pieces 23 that protrude in the longitudinal direction. A locking projection 2 is provided with a pair of holding claws 26, 26, and the main body 22 is cut and raised between the holding claws 26, 26, and an upright portion is located on the back side.
7 is provided, and a locking hole 24 into which another locking projection 27 is fitted is provided in the insertion engagement piece 23, and at least a portion of the locking hole 24 is located between the locking hole 24 and the locking projection 27 and is inserted into the insertion engagement piece 23. A bead portion 25 existing in the mating piece 23 is formed, and at least one insertion hole 29 having a width approximately equal to the thickness of two pieces of the engagement piece 23 is provided at an appropriate position in the longitudinal direction of the main body portion 22. A T-shaped fitting for system ceilings that is characterized by: