JP3349493B2 - Grating - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal used for laying on a floor surface as a floor panel of a clean room, laying above drainage drains and collecting ditches, and laying as a passage plate in factories and the like. The present invention relates to grating of a lattice body.

[0002]

2. Description of the Related Art A grating 1 made of a metal lattice is widely used (see FIG. 5), and since it is required to have a robust mechanical strength to withstand a vehicle load or the like passing through the laid upper surface, the load is supported. The basic configuration of a square lattice body comprising a main member “bearing bars 2 arranged side by side at a fine pitch with the band width direction being vertical” and side frame members 3 fixed to both side ends of the bearing bars 2. Has become.

[0003]

The above-mentioned conventional grating 1 has a structure in which the end portions of the bearing bars 2 and the side frame members 3 of the constituent members are welded and fixed to each other. In addition, a special strength is indispensable for welding and fixing the bearing bar 2 and the side frame member 3 of the load bearing main member. Therefore, the welding process requires a lot of man-hours and time, resulting in an increase in cost, and also requires special strength management and process management to secure the above-mentioned special welding strength, thereby complicating molding management. Is inevitable.

[0004] Clean rooms used as production environments for semiconductors and precision electronic components are required to be almost completely dust-proof and clean. Grating used as floor panels for such clean rooms is made of stainless steel, which is difficult to weld. Since a material is used, difficulties based on the above-mentioned welding process become remarkable, and a solution to the problem is demanded in this field.

[0005] The present invention is to solve the above-mentioned drawbacks of the prior art and to provide a grating that solves the technical problems in the field.

[0006]

The grating of the present invention which solves the above technical problem is a "grating of a rectangular lattice having side frame members on both sides of a bearing bar arranged side by side with the band width direction being vertical. In the grating, a bearing bar group in which a tongue-shaped connection locking piece provided with a lock hole at both ends thereof is provided with a lock hole leaving an intermediate portion of the strip , and a bearing bar connection which projects the lock hole through the connection lock piece. Stray holes
A side frame member which is arranged side by side with the side plate of the tongue plate and is combined with the bearing bar group, and a lock member of a bar shape which penetrates and is set in the lock hole of the bearing bar group in the combined state,
A first invention of "a structure for locking the combined state to a form in which no rattling occurs by the lock member";

[0007] In the grating of a rectangular lattice body provided with side frame members on both sides of a bearing bar arranged side by side with the band width direction being vertical, the belt extends to both ends while leaving a part of the band, and A bearing bar group having a connection locking piece for downwardly facing a locking slot fitted to the side plate of the side frame member, and a posture in which the locking slot faces the side plate through the connection locking piece. it combinations possible bearing bar connecting hole from parallel to the side frame member, further, the bearing bar
Is engaged with the upper edge of the bearing bar connection hole and locked.
A locking claw protruding from the bearing bar group in the combined state, and a tight fit between the locking slot and the side plate; and the connection locking piece and the bear by the locking claw.
A connection lock structure for connecting the bearing bar group and the side frame member, which comprises locking means for a ring bar connection hole, is included in the second invention.

That is, the grating according to the first and second aspects of the invention is characterized in that it is connected and fixed by the above-mentioned "mechanical connection lock means which does not require welding of the bearing bar group and the side frame member". In addition, the above-mentioned square lattice means a thing including a thing of a square frame consisting only of the above-mentioned bearing bar group and a side frame member.

[0009]

The grating according to the first aspect of the present invention is that "the bearing bar group and the side frame member are combined into a rectangular lattice by passing the connection locking pieces at both ends of the bearing bar into the bearing bar connection hole of the side frame member. In the combined state, a bar-shaped lock member penetrates and locks the lock hole group of the connection locking piece protruding from the side plate of the side frame member, so that the shape and mechanical strength as the grating can be accurately secured.

The grating according to the second aspect of the invention is that “the bearing bar connection hole of the side frame member is inserted through the connection locking pieces at both ends of the bearing bar, and then the bearing bar group is forcibly pushed down. Thus, the locking slot of the connection locking piece and the side plate of the side frame member are securely connected to each other to lock the connection, so that the grating load received by the bearing bar acts in a direction to strengthen the connection lock between the two members. Can be carried by the side frame member. Therefore, like the grating of the first invention, there is no danger of "rattle occurrence" during use,
Good mechanical strength and performance as grating can be ensured.

Further, any of the gratings according to the first and second aspects of the invention can be formed only by mechanical connection means without the need for welding the bearing bar group and the side frame members.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a grating 1 according to a first embodiment of the first invention will be described with reference to FIG. That is, the grating 1 of this embodiment is made of stainless steel laid on the floor as a floor panel of the clean room,
The side frame members 3 having a rectangular hollow cross section are connected and fixed to both ends of a group of bearing bars 2 composed of a band member 6 (in this embodiment, a T-bar having a small flange at one side edge of the band member). was in the rectangular grid, the tongue-shaped coupling engagement piece 7 projecting from the both ends of the bearing bars 2, the side members 2 stress
A bar-shaped lock member 10 is press-fitted into a lock hole 8 of a connection locking piece 7 protruding into a hollow portion 9 of the side frame member 2 and assembled by passing through a bearing bar connection hole 5 provided in an inner side plate 4 of the side plate 4. Then, the bearing bar 2 group and the side frame member 3 are mechanically connected and locked.

More specifically, the connection locking piece 7 of the bearing bar 2 is a protruding piece that is straightly protruded laterally except for a vertical intermediate portion of the plate material of the band material 6 and has a lock hole 8. The distance T2 between the rear edge 8A of the lock hole 8 and the front edge 2A of the bearing bar 2 is set to have a relationship of T1> T2 which is slightly smaller than the thickness T1 of the inner side plate 4 of the side frame member 3. .

On the inner side plate 4 of the side frame member 3, bearing bar connecting holes 5 for passing the connecting and locking pieces 7 "without rattling" are arranged side by side at a pitch P to form vertically elongated holes. When the connection locking piece 7 of the bearing bar 2 is inserted into each of the bearing bar connection holes 5 and set, the bearing bars 2 are juxtaposed and combined between the side frame members 3 that are opposed to each other, and the side frames are combined. The upper surface of the member 3 and the upper surface of the bearing bar 2 constitute a common plane, and the grating 1 has a predetermined shape.

On the other hand, the lock member 10 is provided as shown in FIG.
(C)), a rubber-like elastic cushion portion 12 between a pair of plate members 11 is formed in a bar shape at the middle in the thickness direction, and has a substantially same length as the side frame member 3. It passes through the hollow portion 9 of the side frame member 3 and is press-fitted into the lock hole 8 of the group of connecting and locking pieces 7 protruding into the hollow portion 9 to be set through and locked. The side frame member 3 is formed by pressing a bearing bar connecting hole 5 in a flat plate material and then bending it into a tubular shape. Alternatively, the side plate 4 of a mass-produced rectangular tube body is formed by pressing or discharging. It is formed by a known method such as forming a bearing bar connection hole 5 by a known means.

The grating 1 of the embodiment shown in FIG. 1 has the above-mentioned operation, and the bearing bar 2 and the side frame member 3 are mechanically connected and locked, so that the mechanical strength of the floor panel of the clean room is sufficiently high. In addition to this, the conventional complicated welding process is completely unnecessary, so that the molding productivity is particularly improved and the mechanical quality is stabilized. And since the lock member 10 of this embodiment has the elastic cushion portion 12,
The bearing bar group 2 and the side frame member 3 are locked in a tightened state, and there is no possibility of "rattle" during use as a floor panel.

Next, a grating 1 according to another embodiment of the first invention will be described with reference to FIG. That is, similar to the embodiment shown in FIG. 1, “a group of bearing bars 2 having connection locking pieces 7 protruding at both ends and a side frame member 3 having a bearing bar connection hole 5.
And a locking member 10 for locking the combined state of the bearing bar 2 and the side frame member 3 ". In this embodiment, the side frame member 3 is" A groove-shaped case frame 14 having an opening 16 continuous with the opening 16 and a side frame plate 15 in which the bearing bar connection holes 5 are juxtaposed and put inside the case frame 14 to set the opening 16 closed. And two members.

More specifically, the case frame 14 is formed in a groove shape having side flanges 17 on both sides of the opening 16, and one side frame plate 15 is formed by connecting the upper and lower ends of a plate material having the bearing bar connection holes 5 in parallel to the end face flange 18. Into a U-shaped cross-section
When this side frame plate 15 is set in the hollow portion 9 of the case frame 14, the end face flange 18 of the side frame plate 15
4 is fixed to the inner surface of the short side of the short side 4 by a side flange 17 so that the bearing bar connection hole 5 of the side frame plate 15 is formed in the opening 16 of the case frame 14.
It has become.

Then (see FIG. 2A), the case frame 14
The connection locking piece 7 of the bearing bar 2 is put into the side frame member 3 in which the connection locking piece 7 is combined with the side frame plate 15 so as to protrude into the hollow portion 9 and then set in the lock hole 8 of the connection locking piece 7. The locking member 10 in the form of a long bar (in this embodiment, a simple bar in which the elastic cushion portion 12 is not present) is press-fitted and penetrated to be locked to form the grating 1 of a square lattice. In the embodiment of FIG. 2 described above, although the side frame member 3 has a two-member structure, the bearing bar connection hole 5 is provided.
Can be drilled in a flat plate, which facilitates the processing.

Next, another embodiment of the grating according to the first invention will be described with reference to FIG. That is, in the "side frame member 3 with the bearing bar connecting hole 5" shown in FIG. 1, the one shown in FIGS. 3A and 3B has a groove shape in which the outer long side plate having a rectangular cross section is not present. It has a shape in which the “reinforcing plate 19 that closes and passes the opening portion” is provided with screws if necessary. 3A and 3B, the bearing bar connection hole 5 can be easily pressed.
It should be noted that the grating 1 of the present invention (see FIG. 3 (C)) is similar to a known grating, in which bearing bars 2 arranged side by side are arranged.
A reinforcing bar 20 which is connected or welded and connected by mutual engagement of the slots 21 may be attached to the middle upper portion of the reinforcing bar 20.

Next, the grating 1 according to the second embodiment of the present invention will be described with reference to FIG. That is, a side frame member 3 having a rectangular tubular body similar to that of the embodiment of FIG. 1 and bearing bar connecting holes 5 provided side by side on the inner side plate 4 and a connecting locking piece 7 inserted into the bearing bar connecting hole 5 are provided at both ends. The bearing bar connecting hole 5 of the side frame member 3 in the embodiment of FIG. 4 has an upper edge of the hole located at the upper end of the inner side plate 4. The inner side plate 4 is set closer to the upper side.

Then, the connection locking piece 7 of the bearing bar 2
Has a shape having a height H close to the entire length of the bearing bar connecting hole 5 and a straight protruding portion formed integrally with the lower half of the bearing bar 2. A locking slot 21 cut out along the main body edge 24, and a slot width B of the locking slot 21;
Is set to a size that is the same as or slightly smaller than the thickness T1 of the inner side plate 4 of the side frame member 3.

Then, (see FIG. 4 (B)), the respective connection locking pieces 7 of the bearing bar 2 are inserted into the respective bearing bar connection holes 5 so that the locking slots 21 face the lower edge of the bearing bar connection holes 5. Then, the bearing bar 2 is forcibly pressed down to forcibly fit the locking slot 21 and the inner side plate 4 into a tightly connected configuration, and the bearing bar 2 group and the side frame member 3 are set. Is mechanically locked so that the upper surface of the bearing bar 2 and the upper surface of the side frame member 3 are formed in the grating 1 of a square lattice body forming the same plane.

In the embodiment shown in FIG. 4, when the side frame member 3 and the bearing bar 2 are locked, the locking claw 2 is engaged with the upper edge of the bearing bar connecting hole 5 and locked.
Reference numeral 3 protrudes from an upper end of the main body of the bearing bar 2 and has a retaining means for preventing the bearing bar 2 from rising when the connection bar is locked. Further, the connection locking piece 7 in the connection locked state has a relative shape in which the lower end is connected to the bottom plate 25 of the side frame member 3 and the bottom of the locking slot 21 is connected to the lower edge of the bearing bar connection hole 5. Have
A strong bearing load applied to the bearing bar 2 is applied to the connection locking piece 7.
It is constituted so that it may carry appropriately.

The grating 1 of the embodiment shown in FIG. 4 has the above-mentioned operation, and the load applied to the bearing bar 2 acts in the direction in which the engagement between the bearing bar 2 and the side frame member 3 is strengthened. The posture does not collapse, and the strength and performance as grating can be satisfactorily ensured because of the load carrying structure. Since the conventional two-piece structure of the bearing bar 2 and the side frame member 3 eliminates the need for a complicated welding process in the related art, the productivity of grating processing is particularly improved.

The grating 1 of the present invention is not limited to the above embodiment. For example, the side frame member 3 of the embodiment shown in FIG. 4 may be formed into a case body with an opening 16 shown in FIGS. When the "end bearing bar 2A forming a square frame" shown in FIG. 5 is required, the end bearing bar 2A may be post-fixed to the structure of the embodiment by screws or the like. May be applied.

[0027]

As described above, the grating according to the present invention is formed by the mechanical connection locking means without the need for welding the bearing bar group and the side frame member, which require special welding strength and process control. As a result, the moldability of the grating is particularly improved, and there is a useful effect of reducing the molding cost and promoting the simplification of the molding process.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of the grating of the first invention,
(A) is a perspective view of a main part of the grating, (B) is an explanatory view of a constituent member and a connecting method, and (C) is a front view of a main part in a connected state of the constituent member.

FIG. 2 shows another embodiment of the grating of the first invention,
(A) is a perspective view of a main part of the grating, and (B) is an explanatory view of its constituent members and a connecting method.

FIG. 3 shows another embodiment of the grating of the first invention,
(A) and (B) are front views of the main parts, and (C) is a perspective view of the main parts.

FIG. 4 shows an embodiment of the grating of the second invention,
(A) is a perspective view of a main part showing the structure, and (B) is an explanatory view of the connection method and connection state.

FIG. 5 is a perspective view of a conventional grating.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 grating 2 bearing bar 3 side frame member 4 side plate of side frame member 5 bearing bar connection hole 6 band material 7 connection locking piece 8 lock hole 9 hollow portion 10 lock member 11 plate material 12 elastic cushion portion 14 case frame 15 side frame plate Reference Signs List 16 opening 17 side flange 18 end flange 19 reinforcing plate 20 reinforcing bar 21 locking slot 23 locking claw

Claims (4)

(57) [Claims] In a grating of a rectangular lattice body having side frame members on both sides of bearing bars arranged side by side with the band width direction being vertical, a lock hole is provided except for an intermediate portion of the band material. A bearing bar group in which tongue-shaped connection locking pieces are protruded at both ends, and a bearing bar connection hole in which the lock hole protrudes through the connection locking pieces are arranged side by side on a straight plate side plate and combined with the bearing bar group. Side frame members,
A grating comprising a bar-shaped lock member that penetrates and locks into the lock holes of the bearing bar group in the combined state, and locks the combined state in a rattle-free state by the lock member. 2. The grating according to claim 1, wherein the locking member has an elastic cushion portion in a thickness direction. 3. A grating of a rectangular lattice body provided with side frame members on both sides of a bearing bar arranged side by side with a band width direction of the band material extending vertically, and extending to both ends while leaving a part of the band material, A bearing bar group having a connection locking piece for downwardly facing a locking slot fitted to the side plate of the side frame member; and a posture in which the locking slot faces the side plate through the connection locking piece. combinations possible bearing bar connecting hole made parallel to the side frame members to further the bearing bar
Is engaged with the upper edge of the bearing bar connection hole and locked.
A locking claw protruding from the bearing bar group in the combined state, and a tight fit between the locking slot and the side plate; and the connection locking piece and the bear by the locking claw.
A grating characterized by a connection lock structure between the bearing bar group and the side frame member, which is constituted by a locking means for a ring bar connection hole . 4. The grating according to claim 3, wherein the lower end of the connection locking piece of the bearing bar group is joined to the bottom plate of the side frame member when the connection between the bearing bar group and the side frame member is locked.