JPH0423134Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention is applicable to fireproof coating of steel beams when constructing a composite floor plate by pouring concrete on deck plates laid on the steel beams. Standing,
This invention relates to a fireproof covering door that is installed between the back surface of a deck plate peak and the top surface of a steel beam in order to apply fireproof coating to the top surface of the steel beam.

[Conventional technology]

When coating the steel beams that support the composite deck mentioned above with fireproof coating, a method of coating the steel beams with rock wool, etc. is adopted, but for the fireproof coating on the top surface of the steel beams, A mento door is installed between the two, and this mento door is sprayed with rock wool or the like to provide a fireproof coating.

13 and 14 show conventional examples, in which 1 is a steel beam made of H-shaped ropes, 2 is a deck plate, and 3 is a lath wire mesh type door. This side door 3 has a structure in which a lath wire mesh 3b is attached to a round bar 3a of 6 to 9 mm, and this side door 3 is connected between the back surface 2a of the crest of the deck plate 2 and the top surface of the steel beam 1 (as shown in the figure). Attach it to the arrow A) and spray rock wool from diagonally below the arrow B to deposit the rock wool on this side door 3, or apply mortar to this side door 3 to use it as a fireproof covering material. In addition, steel beam 1
A lath wire mesh type door 4 similar to that described above is also installed on the side of the frame, and the steel beam 1 is covered with fireproof coating by spraying rock wool or coating with mortar.
FIG. 14 shows a state in which rock wool has been sprayed or mortar applied, and 5 is the rock wool or mortar. Further, 6 indicates concrete placed on the deck plate 2.

Although not shown, after attaching a receiving material between the back surface 2a of the crest of the deck plate and the top surface of the steel beam 1, a fireproof plate cut to match the shape of the deck plate 2 (for example, There is a method of attaching sheets (such as calcium silicate plates) with adhesive or the like to provide a fireproof coating between the upper surfaces of the steel beams.

[Problem that the invention attempts to solve]

In the method using the lath wire mesh mendo 3 described above, the mendo 3
The operation of attaching it between the back side of the deck plate crest and the top surface of the steel beam is complicated. Furthermore, even with the method using fireproof plates, the installation is similarly complicated. Moreover, both methods are expensive.

The present invention was made in order to solve the above problems, and the object is to obtain a fireproof covering door that has good workability and can be constructed at low cost.

[Means for solving problems]

In order to solve the above problems, the present invention is constructed by bending a flat metal material, and includes a flat part that is placed on the top surface of a steel beam, and a retaining part that is bent and lowered from the front edge of the flat part. The present invention has a structure including a stop part, an inclined surface part bent and inclined upward from the rear end edge of the flat part toward the front end side, and an opening formed in the inclined surface part.

[Effect]

When the side door having the above structure is pushed between the back surface of the deck plate peak and the top surface of the steel beam, the locking portion comes into contact with the steel beam and is set at an appropriate position. In this case, since the inclined surface portion of the door is elastically bent in the direction of its inclination angle, the upper end edge of the inclined surface portion comes into elastic contact with the back surface of the deck plate mountain portion. Therefore, it has a spring effect that applies elastic force in the vertical direction, and can be easily attached without requiring adhesives, screws, or other special attachment means. Moreover,
In the installed state, it is stable against falling due to the spring effect and the locking action of the locking part,
Moreover, there is no risk of it coming off due to vibration.
The openings in the inclined surface allow the air to pass through and smooth the flow when spraying fireproof coating material such as rock wool, so that the fireproof coating material is deposited effectively.
The deposited fireproof coating material will engage the opening and will not easily peel off or fall off.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 12.

Fig. 1 is a perspective view showing the fireproof coating surface door 11 of the first embodiment, Fig. 2 is a front view of the same, Fig. 3 A is a sectional view taken along line A-A in Fig. 2, and Fig. 3 B is a cross-sectional view of the same. -B sectional view. This door 11 is formed by bending an iron plate, and first, an iron plate 12 having the shape shown in the exploded view shown in FIG. 4 is obtained by punching. This iron plate 12 is bent by a press (the mountain folds are shown by broken lines and the valley folds are shown by dashed lines), and as shown in FIGS. edge 1
3a, and an inclined surface part 15 which is inclined at an angle of 60 degrees or the like from the rear edge 13b of the flat part 13 to the front edge 13a side. ing. The inclined surface portion 1
5, as shown in FIG. 2, is formed to match the shape between the back surface 2a of the peak portion of the deck plate 2 and the upper surface of the steel beam, as shown by the two-dot chain line, and has a bent portion 16 near its upper end. There is. Note that the bent portion 16 constitutes a part of the inclined surface portion 15. Bent portion 16 of the embodiment
Bend it backwards at a 90° angle, then
It is bent in two places, again bent forward at an angle of 60 degrees, and in this way, the slope of the upper edge side is made gentler than the slope of the lower part, and the back surface 2a of the mountain part of the deck plate 2 and the upper surface of the steel beam 1 are When the side door 11 is pushed in between, it is pushed in smoothly and a spring effect that applies an elastic force in the vertical direction is appropriately generated.

In addition, slits 15a and 15b are formed in the center and left and right parts of the inclined surface part 15 when it is in the unfolded flat state shown in FIG. The openings 17 and 18 are formed by recessing the openings 17 and 18 (see Figure 3, A, B, etc.). In addition, the central opening 17,
The middle part 19 of 17 serves as a handle for holding by hand.

FIG. 5 is a perspective view showing the door 21 of the second embodiment;
FIG. 6 is a front view of the same, and FIG. 7 is a side view of the same. This side door 21 is formed by bending a wire mesh. The outer shape of the side door 21 is almost the same as the above-mentioned side door 11, and is made by bending the wire mesh 22 in the developed view shown in FIG. 8 using a press, as shown in FIGS. 5, 6, and 7. , a flat part 23, and a locking part 24 hanging down at a right angle from the front edge 23a of this flat part 23.
and from the rear end edge 23b of the flat portion 23 to the front end edge 2
An inclined surface portion 25 is formed that is inclined and raised toward the side 3a. Similar to the above-mentioned surface door 11, the inclined surface portion 25 has a bent portion 26 that is bent in two places near the upper end, which is once bent backward and then bent forward again. Since this door 21 using a wire mesh has openings on the entire surface, there is no need to provide any special openings.

Each side door 11, 21 configured as above is
When this is pushed between the back surface 2a of the crest of the deck plate 2 and the top surface of the steel beam 1, the locking parts 14 and 24 will come into contact with the steel beam 1 and be set at the appropriate position, as shown in FIG. be done. In this case, Mendo 11,
Since the inclined surface portions 15 and 25 of 21 are elastically bent in the direction of the inclination angle (direction of rotation about the rear end edge 13b), bent portions 16 and 26 are formed near the upper end edges of the inclined surface portions 15 and 25. Therefore, the inclined surface part 1
The upper edges of 5 and 25 come into elastic contact with the back surface 2a of the mountain portion of the deck plate 2. Therefore, a spring effect is produced that applies an elastic force in the vertical direction, and the mounting can be easily performed without requiring any special mounting means such as adhesive or welding. Moreover, in the attached state, the spring effect and the locking part 1
Due to the locking action of 4 and 24, it is stable against falling and vibration, and there is little risk of it coming off.

In the case of a side door 11 made of an iron plate, after it is installed between the deck plate 2 and the steel beam 1 as described above, when the side door 11 is sprayed with air such as rock wool, the openings 17 and 18 formed by the slits are
Since this allows the air to pass through during spraying and smooths the flow of the air, rock wool is effectively deposited on the sloped surface portions 15 and 25, and a good fireproof coating is formed. The sprayed and deposited rock wool adheres to the openings 17 and 18 with a portion thereof entering the openings 17 and 18, so that it does not easily peel off or fall off. Figure 10 shows the state in which the entire steel beam has been covered with fireproof coating. 5 is rock wool, which is a fireproof covering material, and 6 is concrete.

In addition, in the case of the door 21 made of wire mesh, the air flow during spraying is smoother, and
Since the deposited rock wool firmly adheres to the wire mesh over the entire surface, the risk of peeling or falling off is further reduced.

Note that if the above-mentioned bent portions 16, 26 are formed near the upper end edges of the inclined surface portions 15, 25, the spring effect of applying an elastic force in the vertical direction will be enhanced, but the bent portions 16, 26 are As shown in FIG. 12, it may be bent at one point further toward the front so that the inclination becomes gentler. Furthermore, as shown in FIG. , 25. Even in these cases, the spring effect of applying an elastic force in the vertical direction is produced by the inclination itself of the inclined surface portions 15, 25, or by this and the bent portions 16, 26 at one place.

[Effect of idea]

As explained above, the mento of the present invention is constructed by bending a flat metal material, and includes a flat part that is placed on the top surface of a steel beam, and a folded part that is bent and lowered from the front edge of the flat part. It is equipped with a locking part, an inclined surface part which is bent from the rear end edge of the flat part to the front end side, and an opening formed in the inclined surface part, so that it can be used in various ways as follows. It has excellent effects.

() Due to the presence of the openings in the sloped surface, the flow of air when spraying the fireproof coating material becomes smooth, and the fireproof coating material is deposited effectively on the sloped surface portion. Further, since the fireproof coating material such as rock wool deposited by air blowing is strongly engaged with the opening of the inclined surface portion, the fireproof coating material is prevented from peeling off or falling off.

() Since a spring effect is produced by the inclined surface formed by bending a flat metal material, installation is done by simply pushing the deck plate between the back of the peak and the top of the steel beam. Moreover, the state after installation is stable against falling and vibration due to the spring effect, etc.
There is no risk of it coming off. In particular, since the sloping surface section rises from the rear edge of the flat section toward the front end (that is, from a position away from the flange edge of the beam toward the flange edge side), the surface from the deck plate side when installed is The force acting on the door has a horizontal component (force component) directed toward the center of the flange, which means that a force is generated in the opposite direction to the direction in which the door will come off, and in this respect, it will not come off easily due to vibrations, etc. It is the composition.

In addition, considering the shape of the mendo of the present invention,
Since many pieces can be stacked closely together and are not bulky, handling at actual construction sites is extremely convenient.

Furthermore, if the opening in the inclined surface is formed not by a simple hole but by inserting two slits and pushing the space between the slits, the pushed-in part will be firmly bonded to the fireproof coating material, and the bonding force will simply be applied to the hole. It becomes even more powerful than if it were opened.

() From the above, the workability is good, and the cost is low compared to fireproof boards made of calcium silicate or the like.

[Brief explanation of drawings]

Figures 1 to 4 show the first embodiment of the fireproof covering door of the present invention, with Figure 1 being a perspective view and Figure 2 being a perspective view.
The figure is the same front view, and Figure 3 A is A-A in Figure 2.
3B is a sectional view, FIG. 4 is a developed view, FIGS. 5 to 8 show the second embodiment, FIG. 5 is a perspective view, and FIG. 6 is a sectional view. The same front view, FIG. 7 is a side view, FIG. 8 is a developed view, FIG. 9 is an explanatory view of usage, FIG. 10 is a view after spraying rock wool, and FIG. 11 is a side view showing another embodiment. Figure, 12th
The figure is a side view showing still another embodiment, FIG.
FIG. 14 is an explanatory diagram of a fireproof coating method using a conventional door. 1... Steel beam, 2... Deck plate, 2a...
... Back side of mountain part, 11, 21 ... Fireproof covering door, 1
3, 23... Flat part, 14, 24... Locking part, 1
5, 25... Sloped surface portion, 16, 26... Bent portion.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) When constructing a composite floor plate by pouring concrete onto a deck plate laid on a steel beam, when applying a fireproof coating to the steel beam, the upper surface of the steel beam must be It is a fireproof covering door that is installed between the back side of the deck plate mountain and the top surface of the steel beam to provide fireproofing.It is made by bending a flat metal material and is a flat door that is placed on the top of the steel beam. a locking part bent and hanging down from the front edge of the flat part, a slope part bent and tilted upward from the rear edge of the flat part toward the front end, and the slope part A side door for fireproof covering of a deck plate, characterized in that it is provided with an opening formed in. (2) Utility model registration claim 1, characterized in that a bent portion is formed near the upper end of the inclined surface portion.
A side door for fireproof coating of the deck plate described in section. (3) The fireproof covering door for a deck plate according to claim 2 of the utility model registration claim, wherein the bent portion has a shape bent at one point bent forward. (4) The fireproof covering surface door of a deck plate according to claim 2 of the utility model registration claim, wherein the bent portion has a double-folded shape that is once bent backward and then bent forward again. . (5) The fireproofing of the deck plate according to claim 1 of the utility model registration claim, wherein the opening is formed by making two cut lines in the inclined surface part and pushing in the part between the cut lines. Covering door.