JPH0545605Y2

JPH0545605Y2 -

Info

Publication number: JPH0545605Y2
Application number: JP1988058414U
Authority: JP
Priority date: 1988-04-27
Filing date: 1988-04-27
Publication date: 1993-11-24
Anticipated expiration: 2003-04-27
Also published as: JPH01160008U

Description

【考案の詳細な説明】〔考案の目的〕（産業上の利用分野）この考案は、点検用グレーチングの開閉装置に
関する。[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) This invention relates to an opening/closing device for inspection gratings.

（従来の技術）従来、高架橋の点検用歩橋には風圧の関係から
グレーチング（綱鉄製の格子状の溝蓋）が床板と
して使用されており、該グレーチングをボルトで
締付け固定している。しかし、定期的なケーブル
等の点検時には、これらのボルトを取り外してグ
レーチングを外して行つており、点検後はまた、
グレーチングをボルトで固定するものであり、そ
の作業中に誤つてボルト等を落下させることが多
く、極めて危険であると共にまた、不経済でもあ
つた。また、ボルトを支持梁に倒立自在に枢着し
ておき、固定時には、グレーチング側に形成した
係止板に穿設した切り欠きに嵌まるようボルトを
立て該ボルトにナツトを螺子止めして固定した構
造のものが特開平１−214639号公報に記載されて
いるが、この構造では便宜上ナツトを螺合したま
まボルトを倒立するため、係止板の縁角部にナツ
トが当たり倒立不能となり、そのためには点検の
際には、かなりナツトを緩めたり締めたりしなけ
ればならず、その作業は煩雑であつた。(Prior Art) Conventionally, gratings (grid-like groove covers made of steel) have been used as floorboards for inspection footbridges of elevated bridges due to wind pressure, and the gratings are tightened and fixed with bolts. However, when regularly inspecting cables, etc., these bolts are removed and the grating is removed.
The grating is fixed with bolts, and bolts and the like often fall by mistake during the work, which is extremely dangerous and also uneconomical. In addition, the bolt is pivotally attached to the support beam so that it can be turned upside down, and when it is fixed, the bolt is erected so that it fits into the notch drilled in the locking plate formed on the grating side, and the nut is screwed onto the bolt to fix it. JP-A No. 1-214639 discloses a structure in which the bolt is turned upside down with the nut screwed together for convenience, so the nut hits the edge corner of the locking plate, making it impossible to turn it upside down. To do this, the nuts had to be loosened and tightened considerably during inspection, and the work was complicated.

（考案が解決しようとする問題点）そこでこの考案は、上記の欠点を除去し、点検
時にグレーチングの固定具が落下することのない
点検用グレーチングの開閉装置を提供するもので
ある。(Problems to be Solved by the Invention) Therefore, the present invention eliminates the above-mentioned drawbacks and provides an opening/closing device for an inspection grating in which the fixture of the grating does not fall during inspection.

[Structure of the idea]

（問題点を解決するための手段）以下、この考案の第一実施例を第１図〜３図に
より説明すると、支持梁３の上に載置した点検用
グレーチング１において、該グレーチングの縁付
近の隣接するベアリングバー１ａ間に、係止板２
を設け、該係止板２には螺子棒４の挿入する切り
欠き２ａを設け、該螺子棒４の後端部に抜け防止
用のストツパー部４ｃを設け、螺子棒の軸の径よ
りやや大きい幅を有する長穴６ａを形成した案内
枠６を設け、螺子棒４が長穴６ａ内を移動するこ
とにより係止板２の切り欠き２ａに挿入してナツ
ト５を締めることによりグレーチング１と支持梁
３とを一時固定し、ナツトを緩め、螺子棒４を切
り欠き２ａより移動させることによりグレーチン
グを開放させるものである。尚、前記ナツト５も
ゆるみ止めナツトを使用すれば螺子棒４より抜け
落ちることがなく、また、係止板２の端部はやや
上方に曲げ、ナツト５が振動等により外れるのを
防止するよう構成してもよい。 (Means for Solving the Problems) Hereinafter, the first embodiment of this invention will be explained with reference to FIGS. 1 to 3. In the inspection grating 1 placed on the support beam 3, A locking plate 2 is placed between adjacent bearing bars 1a.
The locking plate 2 is provided with a notch 2a into which the screw rod 4 is inserted, and a stopper portion 4c is provided at the rear end of the screw rod 4 to prevent it from coming off, and the stopper portion 4c is slightly larger than the diameter of the shaft of the screw rod. A guide frame 6 having a wide elongated hole 6a is provided, and the threaded rod 4 is inserted into the notch 2a of the locking plate 2 by moving within the elongated hole 6a, and is connected to the grating 1 by tightening the nut 5. The grating is opened by temporarily fixing the beam 3, loosening the nut, and moving the screw rod 4 from the notch 2a. If a locking nut is used for the nut 5, it will not fall off from the screw rod 4, and the end of the locking plate 2 is bent slightly upward to prevent the nut 5 from coming off due to vibration, etc. You may.

（作用）次に、この考案の作用を説明すると、ナツト５
を緩めると、ナツト５により支持梁３方向に圧着
されていた係止板２は開放され、更に、螺子棒４
を摺動させて、ナツト５を係止板２の切り欠き２
ａより外方に移動させることにより、グレーチン
グ１と支持梁３は固定状態を解除され、グレーチ
ングは開放されるものである。(Function) Next, to explain the function of this device, Natsu 5
When the locking plate 2 is crimped in the direction of the support beam 3 by the nut 5, it is released, and the screw rod 4
Slide the nut 5 into the notch 2 of the locking plate 2.
By moving the grating 1 and the support beam 3 outward from a point a, the fixed state of the grating 1 and the support beam 3 is released, and the grating is opened.

また、閉塞する場合には前記の作業を逆に行う
ものである。 Moreover, in case of blockage, the above-mentioned operation is performed in reverse.

[Effect of idea]

この考案によると、係示板２、螺子棒４はそれ
ぞれ分離不可能に形成されており、ナツト５も螺
子棒４に螺合されており、このナツト５を緩めて
ナツトと螺合した螺子棒４を摺動することにより
グレーチング１を開口する際、また、螺子棒４を
摺動して切り欠き２ａ部分でナツト５を締めるこ
とによりグレーチング１と支持梁３とを固定して
閉塞する際にもナツト等が脱落して下方に危険を
与えることがなく、更に、ナツト５は、横方向に
摺動させるため、少し緩めたり、締めたりすれば
よく、省力的であり、しかもこのゆるみ止めナツ
トを使用すれば螺子棒より外れて落ちる恐れがな
く、極めて有益なる効果を奏する。 According to this invention, the locking plate 2 and the screw rod 4 are formed so that they cannot be separated, and the nut 5 is also screwed onto the screw rod 4. After loosening the nut 5, the screw rod 4 is screwed into the nut. When the grating 1 is opened by sliding the grating 1, and also when the grating 1 and the support beam 3 are fixed and closed by sliding the screw rod 4 and tightening the nut 5 at the notch 2a. Nuts etc. do not fall off and pose a danger to those below, and since the nut 5 slides laterally, it only needs to be slightly loosened or tightened, which is labor-saving. When used, there is no risk of it falling off the screw rod, and it has an extremely beneficial effect.

[Brief explanation of the drawing]

第１図は、この考案の一実施例を示す一部欠截
平面図、第２図は、第１図中−断面図、第３
図は、この考案の一実施例を示す一部欠截側面
図、第４図は、この考案の従来例を示す一部欠截
平面図である。１……点検用グレーチング、１ａ……ベアリン
グバー、２……係止板、２ａ……切り欠き、３…
…支持梁、４……螺子棒、４ｃ……ストツパー
部、５……ナツト、６……案内枠、６ａ……長
穴。 Fig. 1 is a partially cutaway plan view showing an embodiment of this invention, Fig. 2 is a sectional view of Fig. 1, and Fig.
The figure is a partially cutaway side view showing an embodiment of this invention, and FIG. 4 is a partially cutaway plan view showing a conventional example of this invention. 1... Inspection grating, 1a... Bearing bar, 2... Locking plate, 2a... Notch, 3...
...Support beam, 4...Threaded rod, 4c...Stopper part, 5...Nut, 6...Guide frame, 6a...Elongated hole.

Claims

[Scope of utility model registration request]

Inspection grating 1 placed on support beam 3
A locking plate 2 is provided between adjacent bearing bars 1a near the edge of the grating, a notch 2a into which a threaded rod 4 is inserted is provided in the locking plate 2, and the threaded rod 4 is connected to the support beam 3. The screw rod 4 is slidably installed between the elongated holes of the guide frame formed in the notch 2.
For inspection, the grating 1 and the support beam 3 are temporarily fixed by inserting the rod into a hole and tightening a nut 5, and then releasing the grating by loosening the nut and moving the threaded rod 4 from the notch 2a. Grating switchgear.