JPH09144126A - Manufacture of ditch covering structural member - Google Patents
Manufacture of ditch covering structural memberInfo
- Publication number
- JPH09144126A JPH09144126A JP32817595A JP32817595A JPH09144126A JP H09144126 A JPH09144126 A JP H09144126A JP 32817595 A JP32817595 A JP 32817595A JP 32817595 A JP32817595 A JP 32817595A JP H09144126 A JPH09144126 A JP H09144126A
- Authority
- JP
- Japan
- Prior art keywords
- shape steel
- section
- steel
- structural material
- shape
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Sewage (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】この発明は、断面矩形、逆台形ま
たはI字形の型鋼よりなる溝蓋用構造材、特に該型鋼の
幅方向一端側の側端面にスリップ防止用の突起部を有す
る該構造材の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structural material for a groove lid, which is made of a shaped steel having a rectangular cross section, an inverted trapezoidal shape or an I-shaped shape, and more particularly, a structure having a projection for preventing slippage on a side end surface on one widthwise end side The present invention relates to a method for manufacturing a structural material.
【0002】[0002]
【従来の技術】第8図に示すように道路の側溝やマンホ
ールAに溝蓋を取付ける場合に、自動車の通行を可能に
する耐荷重強度の大きい溝蓋Bとして、直立状態の帯板
からなる矩形外枠aの両側長辺部間に多数の短尺帯板b
をその両端で溶接して平行に架設すると共に、断面略正
方形の線材をねじったねじれ線材(ツイストバー)cま
たは丸棒の複数本を上記短尺帯板と直交する方向に平行
配設して溶接することにより、格子状としたものが従来
より汎用されている。2. Description of the Related Art As shown in FIG. 8, when a groove cover is attached to a side groove or a manhole A of a road, a groove cover B having a large load-bearing strength that enables passage of an automobile is composed of an upright strip. A large number of short strips b between the long sides on both sides of the rectangular outer frame a
Are welded at both ends and installed in parallel, and a plurality of twisted wire rods (twist bars) c or round bars formed by twisting a wire rod having a substantially square cross section are arranged in parallel in the direction orthogonal to the short strip plate and welded. By doing so, a lattice-shaped one has been widely used.
【0003】しかし、上記短尺帯板には一般的に断面矩
形やI字型の型鋼が使用されていたが、その断面におけ
る短辺側の両表面が共に平坦であるために、これを用い
た溝蓋上を通過する自動車のタイヤが型鋼の平坦な上面
に沿ってスリップし易く危険であった。[0003] However, although a rectangular section steel or an I-shaped section steel is generally used for the short strip, it is used because both surfaces on the short side of the section are flat. It was dangerous that an automobile tire passing over the groove lid easily slips along the flat upper surface of the mold steel.
【0004】そこで、従来より第9図に示すように断面
矩形の型鋼の該断面における短辺側の一表面に長手方向
に沿って一定ピッチ間隔でスリップ防止用の突起部をプ
レス型で打ち抜いて形成した溝蓋用構造材が使用されて
いる。Therefore, conventionally, as shown in FIG. 9, a slip preventing projection is punched with a press die at a constant pitch along the longitudinal direction on one surface of the short side of the section of the section steel having a rectangular section. The formed groove lid structural material is used.
【0005】[0005]
【発明が解決しようとする課題】しかしながら、上記構
造材の突起部は、冷間時にプレス加工で突起形状の不要
な部分を打ち抜いて型鋼の上記一表面つまり幅方向一端
側の側端面を該突起部に対応した凹凸に押し抜く方法に
よって形成されているため、通常の押し抜き圧力では5
mm程度の板厚までの加工が限界であり、それ以上の板
厚を押し抜くと突起部自体が形状変形をきたしたり寸法
精度が出ないという難点があった。However, the projecting portion of the structural material is formed by punching out an unnecessary portion of the projecting shape by pressing during cold working to form the above-mentioned one surface of the shape steel, that is, the side end surface on one end in the width direction. Since it is formed by the method of punching into unevenness corresponding to the part, it is 5 at normal punching pressure.
There is a limit to the processing up to a plate thickness of about mm, and if a plate thickness more than that is pushed out, there is a problem that the projection itself deforms the shape and the dimensional accuracy is not obtained.
【0006】そのため重荷重用として使用される高さ5
0mm以上の断面矩形やI字型の型鋼は、板厚が5mm
を越えるためこの方法では加工が困難であった。Therefore, the height 5 used for heavy loads
Steel plate with a rectangular or I-shaped cross section of 0 mm or more has a plate thickness of 5 mm.
However, this method is difficult to process.
【0007】[0007]
【課題を解決するための手段】この発明は、上述の事情
に鑑みて、板厚が5mmを越える型鋼においても突起部
の高さが高く、従って大きなスリップ防止作用を発現で
きる溝蓋構造材の製造方法を提供することを目的として
いる。In view of the above-mentioned circumstances, the present invention provides a groove lid structure material capable of exhibiting a large slip preventing effect even in a die steel having a plate thickness of more than 5 mm. It is intended to provide a manufacturing method.
【0008】すなわち、この発明に係る溝蓋用構造材の
製造方法は、上記目的を達成するために、熱間圧延にお
いて、断面矩形、逆台形またはI字形の型鋼を一対のロ
ール間で型鋼幅方向に印圧すると共に、これら両ロール
の一方に設けた周溝による印圧によって前記型鋼の幅方
向一側の側端面に型鋼長手方向に沿う凸条を形成し、凸
条部の厚さは5mm以下とし、この凸条の頂部を凹凸形
状をもつプレス型で打ち抜いて該凸状の上部に所定間隔
で突起部を形成する構造を採用したものである。That is, in order to achieve the above-mentioned object, the groove lid structural material manufacturing method according to the present invention is characterized in that, in hot rolling, a section steel having a rectangular cross section, an inverted trapezoidal shape or an I shape is formed between a pair of rolls. In addition to printing pressure in the direction, a ridge extending along the longitudinal direction of the mold steel is formed on the side end surface on one side in the width direction of the mold steel by the pressure applied by the circumferential groove provided on one of these rolls, and the thickness of the ridge is 5 mm In the following, a structure is adopted in which the tops of the ridges are punched with a press die having an uneven shape to form protrusions on the upper portions of the ridges at predetermined intervals.
【0009】またこの発明は、前記突起部の凸部ピッチ
が10.0、12.5又は16.7mmに設定されると
共に、突起部と凸条との合計の高さが2.0〜4.0m
mに設定されてなることを好適な実施態様とする。Further, according to the present invention, the projection pitch of the projections is set to 10.0, 12.5 or 16.7 mm, and the total height of the projections and the projections is 2.0 to 4. 0.0 m
A preferred embodiment is that it is set to m.
【0010】[0010]
【作用】この発明方法では、型鋼の側端面に形成した凸
条が型鋼本体部に比べて薄肉であるために、プレス型で
打ち抜き易く充分な高さの突起部が形成される。According to the method of the present invention, since the ridge formed on the side end surface of the mold steel is thinner than the main body of the mold steel, a protrusion having a sufficient height can be easily formed by a press die.
【0011】また、前記突起部は打ち抜き加工により角
部が鋭角に加工でき、高いスリップ防止効果をもたせる
ことができる。Further, the protrusions can be punched so that the corners can be processed into acute angles, and a high slip preventing effect can be provided.
【0012】更にツイストバーまたは丸棒の複数本と上
記型鋼を直交する方向にピッチ50又は100mmで平
行配設して溶接するため、突起部の凸部ピッチを10.
0、12.5又は16.7mmに設定することで溶接位
置が常に突起部の同じ位置となり安定した溶接が可能と
なる。Further, since a plurality of twist bars or round bars are arranged in parallel in the direction orthogonal to each other and welded at a pitch of 50 or 100 mm, the protrusion pitch of the protrusions is 10.
By setting it to 0, 12.5 or 16.7 mm, the welding position is always the same position on the protrusion, and stable welding is possible.
【0013】更にまた突起部及び凸条の合計の高さが
2.0mm〜4.0mmに設定されることによってスリ
ップ防止作用が向上することが実験の結果判明してい
る。Furthermore, it has been proved as a result of experiments that the anti-slip action is improved by setting the total height of the projections and the ridges to 2.0 mm to 4.0 mm.
【0014】[0014]
【実施例】以下に、この発明方法を図示実施例に基づい
て具体例的に説明する。第1図〜第4図は第5図で示す
溝蓋用構造材10の熱間圧延及びプレス打ち抜きによる
製造工程例を表している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The method of the present invention will be specifically described below with reference to the illustrated embodiments. 1 to 4 show an example of a manufacturing process by hot rolling and press punching of the groove lid structural material 10 shown in FIG.
【0015】まず、第1図A,Bで示す第1工程では、
ロールR1の溝底に凸条形成用周溝1bを有する保持用
周溝1aと、これに対向するロールR2の保持用周溝2
aとの間に、断面矩形の型鋼10aをその主面がロール
軸方向と直交する縦形で挿通して型鋼幅方向に印圧す
る。これにより、型鋼10aは、その幅方向一端側の側
端面に長手方向に沿う高さh1の凸条11aを有する型
鋼10bとなる。First, in the first step shown in FIGS. 1A and 1B,
A holding circumferential groove 1a having a ridge forming circumferential groove 1b on the groove bottom of the roll R1 and a holding circumferential groove 2 of the roll R2 facing the holding circumferential groove 1a.
A die steel 10a having a rectangular cross-section is inserted between a and a in a vertical shape whose main surface is orthogonal to the roll axis direction, and printing pressure is applied in the die steel width direction. As a result, the mold steel 10a becomes the mold steel 10b having the ridge 11a having the height h1 along the longitudinal direction on the side end surface on the one widthwise side.
【0016】次に、第2図A,Bで示す第2工程では、
共に狭幅凸周面部3a,4aと広幅凸周面部3b,4b
との間に環状凹部3c,4cを有する同一対向周面のロ
ールR3,R4間に、型鋼10bをその主面がロール軸
方向と平行になる横形でかつ凸条11aが狭幅凸周面部
3a,4a間に位置するように挿通させて厚み方向に印
圧する。これによって型鋼10bは、両側主面中央部が
狭圧されて断面図I字形に転換すると同時に、凸条11
aがその両側面より狭圧されて高さをh2に増大すると
共に薄肉化し、凸条11bを有する型鋼10cとなる。Next, in the second step shown in FIGS. 2A and 2B,
Both are narrow convex peripheral surface portions 3a and 4a and wide convex peripheral surface portions 3b and 4b.
Between the rolls R3 and R4 on the same opposing peripheral surface having the annular concave portions 3c and 4c between them, the shape steel 10b is a horizontal shape whose main surface is parallel to the roll axial direction, and the ridge 11a has a narrow convex peripheral surface portion 3a. , 4a so as to be located between them, and printing pressure is applied in the thickness direction. As a result, in the shape steel 10b, the central portions of both main surfaces are narrowed and converted into a sectional view I-shape, and at the same time, the ridges 11 are formed.
a is narrowed down from its both side surfaces to increase the height to h2 and is thinned to be the shaped steel 10c having the ridges 11b.
【0017】続いて第3図で示す第3工程では、共に環
状凹部5a,6aと5b,6b間に広幅凸周面部5c,
6cを有する同一対向周面のロールR5,R6間に、型
鋼10dを第2工程と同様に横形にして挿通させて印圧
する。これによって型鋼10dは所定の寸法精度の型鋼
10eに仕上げられる。Subsequently, in a third step shown in FIG. 3, the wide convex peripheral surface portion 5c, between the annular concave portions 5a, 6a and 5b, 6b is formed.
Similarly to the second step, the die steel 10d is horizontally inserted between the rolls R5 and R6 having the same facing peripheral surface and having 6c, and printing pressure is applied. As a result, the mold steel 10d is finished into a mold steel 10e having a predetermined dimensional accuracy.
【0018】最後に第4図で示す第4工程では、凸条の
頂面を凹凸形状をもつプレス型で打ち抜いて該凸状の上
部に所定間隔で突起部を形成し溝蓋用構造材10とな
る。Finally, in the fourth step shown in FIG. 4, the top surface of the ridge is punched out by a press die having an uneven shape to form protrusions on the upper portion of the ridge at predetermined intervals to form the groove lid structural material 10. Becomes
【0019】この発明方法によって製造される溝蓋用構
造材は、本体部が断面I字形をなすものに限らず、第6
図A,Bで示すような本体部が断面矩形または逆台形を
なす構造材でもよい。The structure material for the groove lid manufactured by the method of the present invention is not limited to one in which the main body has an I-shaped cross section, and
A structural member whose main body has a rectangular cross section or an inverted trapezoidal shape as shown in FIGS.
【0020】このような構造材13、14では、前記第
2工程及び第3工程のロールR3,R4,R5,R6と
して構造材13、14の両側主面との当接部が平坦面あ
るいはテーパ面であるものを使用すればよい。In the structural materials 13 and 14 as described above, the rolls R3, R4, R5 and R6 of the second step and the third step have flat surfaces or tapered contact portions with both main surfaces of the structural materials 13 and 14, respectively. What is a surface may be used.
【0021】なお、突起部の高さは充分なスリップ効果
を得る上で、2.0〜4.0mm程度の範囲が最適であ
り、その底をなす凸条の高さは1.5〜3.5mm程度
とするのがよい。In order to obtain a sufficient slip effect, the height of the protrusion is optimally in the range of about 2.0 to 4.0 mm, and the height of the ridge forming the bottom thereof is 1.5 to 3. It is good to set it to about 0.5 mm.
【0022】また突起部のピッチ間隔は種々設定可能で
あるが、ツイストバーの溶接位置と一致させる上で1
0、12.5又は16.7mmが好ましい。Although the pitch interval of the protrusions can be set variously, in order to match the welding position of the twist bar,
0, 12.5 or 16.7 mm is preferred.
【0023】一方、構造材の厚みは5〜10mm程度、
幅は25〜100mm程度がよい。On the other hand, the thickness of the structural material is about 5 to 10 mm,
The width is preferably about 25 to 100 mm.
【0024】第7図は、この発明方法にて得られる溝蓋
用構造材10を用いた溝蓋の一例を示すものである。FIG. 7 shows an example of a groove lid using the groove lid structural material 10 obtained by the method of the present invention.
【0025】図示の如く、この溝蓋は、主面が格子状を
なす矩形箱形であり、通常の型鋼からなる直立した左右
の短尺帯板と前後の長尺帯板とによって囲繞され、前後
の長尺帯板間に、凸条および突起部を有する側端面を上
にした直立状態の短尺の構造材がその両端を溶接するこ
とにより一定間隔で平行状に架設され、かつこれら構造
材と直交する断面略正方形のねじれ線材または丸棒の複
数本が所定間隔で電気抵抗溶接等にて構造材の上縁部間
にわたり固着されて縦横の格子を形成している。As shown in the figure, the groove lid has a rectangular box shape whose main surface is a lattice, and is surrounded by upright left and right short strips and front and rear long strips made of normal steel, and is surrounded by the front and back. Between the long strips of the above, a short length of upright structural material with the side end surface having the ridges and projections facing up is installed in parallel at a constant interval by welding both ends thereof, and these structural materials and A plurality of orthogonal twisted wire rods or round rods each having a substantially square cross section are fixed at predetermined intervals across the upper edge portions of the structural material by electric resistance welding or the like to form vertical and horizontal lattices.
【0026】[0026]
【発明の効果】この発明方法によれば、型鋼の幅方向一
端側の側端面に凸条を設け、これをプレスで打ち抜いて
突起部を形成するから、板厚の厚い部材でも突起部を形
成することができ、これによってスリップ防止効果の大
きい高い突起部を有する溝蓋用構造材を容易に製造でき
る。According to the method of the present invention, since the convex strip is provided on the side end surface on the one end side in the width direction of the shape steel and the projecting portion is formed by punching this with a press, the projecting portion is formed even with a thick plate member. Therefore, it is possible to easily manufacture the groove lid structural member having a high protrusion having a large slip prevention effect.
【第1図A】この発明方法の一実施例における第1工程
の斜視図FIG. 1A is a perspective view of a first step in one embodiment of the method of the present invention.
【第1図B】同工程の印圧部の断面図[FIG. 1B] A sectional view of the printing portion in the same process.
【第2図A】同第2工程の斜視図FIG. 2A is a perspective view of the second step.
【第2図B】同工程の印圧部の断面図[FIG. 2B] A sectional view of the printing portion in the same step
【第3図】同第3工程の斜視図FIG. 3 is a perspective view of the same third step.
【第4図】同第4工程の斜視図FIG. 4 is a perspective view of the fourth step.
【第5図】この発明方法にて得られる溝蓋用構造材FIG. 5: Structural member for groove lid obtained by the method of the present invention
【第6図】同構造材の他の例を示す。FIG. 6 shows another example of the same structural material.
【第7図】同構造材を用いた溝蓋の斜視図FIG. 7 is a perspective view of a groove lid using the same structural material.
【第8図】溝蓋の取付状態を示す縦断面図FIG. 8 is a vertical cross-sectional view showing how the groove lid is attached.
【第9図】従来の滑り止め部材[FIG. 9] Conventional anti-slip member
R1、R2 凸条を形成するロール R3、R4 凸条を狭圧するロール R5、R6 所定の寸法精度に仕上げるロール 10 溝蓋用構造材 10a〜10e 型鋼 11,11a,11b 凸条 12 突起部 13 断面矩形の溝蓋用構造材 14 断面逆台形の溝蓋用構造材 R1, R2 Rolls forming ridges R3, R4 Rolls for narrowing ridges R5, R6 Rolls for finishing to predetermined dimensional accuracy 10 Structural material for groove lids 10a to 10e type steel 11, 11a, 11b Convex ridges 12 Protrusions 13 Cross section Rectangular groove lid structural material 14 Reverse trapezoidal groove lid structural material
Claims (3)
たはI字形の型鋼を一対のロール間で型鋼幅方向に印圧
すると共に、これら両ロールの一方に設けた周溝による
印圧によって前記型鋼の幅方向一側の側端面に型鋼長手
方向に沿う凸条を形成し、この凸状の頂面を凹凸形状を
もつプレス型で打ち抜いて該凸状の上部に所定間隔で突
起部を形成することを特徴とする溝蓋用構造材の製造方
法1. In hot rolling, a mold steel having a rectangular cross section, an inverted trapezoidal shape or an I-shape is pressed in a width direction of the mold steel between a pair of rolls, and the mold steel is formed by a circumferential groove provided in one of the rolls. A convex strip is formed on the side end surface on one side in the width direction along the longitudinal direction of the shape steel, and the convex top surface is punched with a press die having an uneven shape to form protrusions at predetermined intervals on the convex upper portion. A method for manufacturing a structural material for a groove lid, characterized in that
2.5又は16.7mmに設定されてなる請求項1記載
の溝蓋用構造材の製造方法2. The protrusion pitch of the protrusions is 10.0, 1
The method for manufacturing a groove cover structural material according to claim 1, wherein the groove cover structural material is set to 2.5 or 16.7 mm.
4.0mmに設定されてなる請求項1または2記載の溝
蓋用構造材の製造方法。3. The total height of the protrusion and the ridge is 2.0 to
The method for manufacturing a structural material for a groove lid according to claim 1 or 2, wherein the method is set to 4.0 mm.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP32817595A JPH09144126A (en) | 1995-11-21 | 1995-11-21 | Manufacture of ditch covering structural member |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP32817595A JPH09144126A (en) | 1995-11-21 | 1995-11-21 | Manufacture of ditch covering structural member |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH09144126A true JPH09144126A (en) | 1997-06-03 |
Family
ID=18207324
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP32817595A Pending JPH09144126A (en) | 1995-11-21 | 1995-11-21 | Manufacture of ditch covering structural member |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH09144126A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010000597A (en) * | 2000-10-25 | 2010-01-07 | Daikure Co Ltd | Manufacturing method for grating |
JP5584338B1 (en) * | 2013-08-19 | 2014-09-03 | 株式会社宝機材 | Grating and production method of grating |
-
1995
- 1995-11-21 JP JP32817595A patent/JPH09144126A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010000597A (en) * | 2000-10-25 | 2010-01-07 | Daikure Co Ltd | Manufacturing method for grating |
JP5584338B1 (en) * | 2013-08-19 | 2014-09-03 | 株式会社宝機材 | Grating and production method of grating |
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