JPH066859B2 - Rubber ladder - Google Patents
Rubber ladderInfo
- Publication number
- JPH066859B2 JPH066859B2 JP16321289A JP16321289A JPH066859B2 JP H066859 B2 JPH066859 B2 JP H066859B2 JP 16321289 A JP16321289 A JP 16321289A JP 16321289 A JP16321289 A JP 16321289A JP H066859 B2 JPH066859 B2 JP H066859B2
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- ladder
- step member
- steel pipe
- wire rope
- 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.)
- Expired - Lifetime
Links
Landscapes
- Ladders (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はけい船岸壁等における使用に好適なゴム製はし
ごに関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a rubber ladder suitable for use in a quay and the like.
従来けい船岸壁等に用いるはしごとして、鉄製のはしご
が用いられている。しかい鉄製はしごは船舶の衝突や物
の落下による衝撃により永久歪を生じ易く、一旦永久歪
が生じるとその後の繰返し使用し耐えない。したがって
岸壁等に用いられる鉄製はしごはその寿命が極めて短い
という欠点があった。Conventionally, iron ladders have been used as ladders used for quay walls and the like. The steel iron ladder is liable to cause permanent strain due to the impact of a collision of a ship or a fall of an object, and once the permanent strain occurs, it cannot be used repeatedly thereafter. Therefore, the iron ladder used for the quay has a drawback that its life is extremely short.
このようた鉄製はしごの欠点を除去するものとして、実
公昭６３−４８８００号には、筒状の防舷材形状にゴム
で形成した１対の平行な側柱を同質のゴムで一体に形成
した複数の横浅によって一定間隔ごとに結合してなり、
この横浅の内部には両側が側柱の内部に固定されている
チェーン等の抗張体を若干緩めた状態で埋設した岸壁用
はじごが示されている。このはじごは、側柱の構造が防
舷材と同じであるため、船を衝突に対して衝撃作用を営
み、永久歪や破損を防止することができる上に、チェー
ン等の抗張体が若干緩んだ状態で横桟中に埋設されてい
るので、船の衝突によって両側の側柱間の距離が広がっ
たり挟まったりしても柔軟にこれに追従することができ
る、という効果を有するものである。In order to eliminate the drawbacks of such an iron ladder, in Japanese Utility Model Publication No. 63-48800, a pair of parallel side columns formed of rubber in a cylindrical fender shape are integrally formed of the same quality rubber. Combined at regular intervals by multiple horizontal shallows,
A quay ladder in which a tensile body such as a chain whose both sides are fixed to the inside of a side pillar is buried in a slightly loosened state is shown in this shallow depth. Since this ladder has the same side pillar structure as the fender, it can shock the ship against impacts and prevent permanent distortion and damage. Since it is buried in the cross rail in a slightly loosened state, it has the effect of being able to flexibly follow the distance between the side pillars on both sides due to a ship collision. is there.
上記のとおり、上記実公昭６３−４８８００号記載のは
しごは、永久歪の発生を防止し、はしごの寿命を伸ばす
という点で従来の鉄製は押しごの欠点を除去するもので
はあるが、反面このはしごは、横桟にチェーン等の抗張
体が若干緩んだ状態で埋設されているので、人が乗った
時撓みすぎ、昇降に際してぐらついて不安定となる、と
いう問題点があることが判った。この問題点を解決する
一方法として、横桟のゴムを厚くすることにより横桟を
太くすることが考えられるが、ゴムを多量に使用するの
でコスト高となる上に、横桟が太くなって把み難くな
り、また変形し難くなるので防舷機能を損うという新た
な問題点が生じる。As described above, the ladder described in Japanese Utility Model Publication No. 63-48800 eliminates the disadvantages of the conventional iron push rod in that it prevents permanent strain from occurring and extends the life of the ladder. Since the ladder is embedded in the cross rail with a tension body such as a chain slightly loosened, it was found that there is a problem that when a person gets on the ladder, it bends too much and becomes unstable when it goes up and down. . One possible solution to this problem is to thicken the cross rail by thickening the cross rail, but since a large amount of rubber is used, the cost is high and the cross rail becomes thick. Since it becomes difficult to grasp and deform, it causes a new problem that the fender function is impaired.
本発明は、このような従来技術の課題を解決するために
なされたものであって、船の衝突や物の落下によって永
久歪が生じることなく、しかも昇降に際してぐらつかず
安定製のよいけい船岸壁等における使用に好適なゴム製
はしごを提供しようとするものである。The present invention has been made in order to solve the problems of the prior art as described above, and does not cause permanent distortion due to a collision of a ship or a fall of an object, and is stable and stable when moving up and down. It is intended to provide a rubber ladder suitable for use in, for example,
上記目的を達成する本発明のはしごは、平行に配置され
た１対の筒状のゴム製側柱部と、両端部が前記１対の側
柱部の対向する壁部に穿設されたステップ部材挿通孔を
通って、前記側柱部の内部空間内に突出しかつこれら両
端部に前記ステップ部材挿通孔よりも大径の係止部が形
成された複数のゴム製ステップ部材とを備え、各ゴム製
ステップ部材には、両端部附近が剛性の部材からなり中
央部が可撓性の部材からなる芯材が埋設されていること
を特徴とするものである。A ladder of the present invention that achieves the above-mentioned object is a step in which a pair of cylindrical rubber side pillars arranged in parallel and both ends thereof are bored in opposing walls of the pair of side pillars. A plurality of rubber step members that pass through the member insertion holes and project into the inner space of the side pillar portion and that have locking portions having a diameter larger than that of the step member insertion holes are formed at both ends thereof; The rubber step member is characterized in that a core member having a rigid member near both ends and a flexible member at the center is embedded.
各ゴム製ステップ部材の両端部は筒状のゴム製側柱部の
内部空間内に突出し、ステップ部材挿通孔よりも大径の
係止部が形成されており、またステップ部材の芯材は中
央部が可撓性の部材からなるものであるから、ステップ
部材に荷重が加えられたときはステップ部材およびその
両端の係止部が当接する筒状のゴム製側柱部はそれぞれ
弾性変形し、荷重が取去られた後直ちに元の形状に復元
し、永久歪が残ることはない。またステップ部材の芯材
の両端部が剛性の部材で構成されてるため、はしごの昇
降に際しステップ部材の沈みが少く安定性がよい。Both ends of each rubber step member project into the inner space of the cylindrical side pillar of rubber, and a locking portion having a diameter larger than that of the step member insertion hole is formed, and the core material of the step member is at the center. Since the portion is made of a flexible member, when a load is applied to the step member, the cylindrical rubber side column portion with which the step portion and the locking portions at both ends thereof come into elastic deformation, Immediately after the load is removed, it returns to its original shape without permanent set. Further, since both ends of the core material of the step member are made of rigid members, there is little sinking of the step member when the ladder is moved up and down, and stability is good.
以下添付図面を参照して本発明の実施例について説明す
る。Embodiments of the present invention will be described below with reference to the accompanying drawings.
第１図は本発明のゴム製はしごのステップ部材の構成を
示すもので、第３図Ｄ部の拡大断面図である。また第２
図は本発明のはしごを岸壁に取付けた状態における平面
図、第３図はその正面図、第４図は第２図の一部拡大図
である。FIG. 1 shows the structure of a step member of a rubber ladder according to the present invention, and is an enlarged cross-sectional view of a D portion in FIG. The second
FIG. 4 is a plan view of the ladder of the present invention attached to a quay, FIG. 3 is a front view thereof, and FIG. 4 is a partially enlarged view of FIG.
本発明のゴム製はしご１は、１対の平行に配置されたゴ
ム製側柱部２，２とこれら側柱部２，２によって支持さ
れる複数のステップ部材３，３…からなるものである。
各側柱部２は角筒状に形成され、内部空間４を有してい
る。第４図から明らかなように、各側柱部２の後壁ａに
は長手方向に延びる補強鉄板６が埋込まれており、また
適宜の箇所に複数の取付孔２ｂ（第４図）が穿設されて
いる。これらの取付孔２ｂを貫通してボルト７を岸壁８
に植込み、ナット１０で締付けることにより後壁２ａを
岸壁８に固定する。側柱部２の前壁２ｃにはナット挿入
孔２ｄが穿設されている。１対の側柱部２，２の対向す
る側壁２ｅ，２ｅには側柱部２の後端縁から距離ｄをへ
だててそれぞれステップ部材挿通孔２ｆが穿設されてい
る。The rubber ladder 1 of the present invention comprises a pair of rubber side column parts 2 and 2 arranged in parallel and a plurality of step members 3, 3 supported by these side column parts 2, 2. .
Each side pillar portion 2 is formed in a rectangular tube shape and has an internal space 4. As is apparent from FIG. 4, a reinforcing iron plate 6 extending in the longitudinal direction is embedded in the rear wall a of each side pillar portion 2, and a plurality of mounting holes 2b (FIG. 4) are provided at appropriate places. Has been drilled. The bolt 7 is passed through these mounting holes 2b to attach the bolt 7 to the quay 8.
The rear wall 2a is fixed to the quay 8 by implanting it into the quay and tightening it with the nut 10. A nut insertion hole 2d is formed in the front wall 2c of the side column portion 2. Step member insertion holes 2f are formed in the opposite side walls 2e, 2e of the pair of side pillars 2, 2 at a distance d from the rear end edge of the side pillars 2.
ゴム製ステップ部材３は、その両端部３ａ，３ａ（第１
図、第４図）がそれぞれ側柱部２のステップ部材挿通孔
２ｆを貫通して側柱部２の内部空間４内に突出し、かつ
これら両端部３ａ，３ａにステップ部材挿通孔２ｆより
も大径の係止部３ｂが形成されている。The rubber step member 3 has two end portions 3a, 3a (first
(Fig. 4, Fig. 4) respectively penetrate the step member insertion hole 2f of the side pillar portion 2 and project into the internal space 4 of the side pillar portion 2, and these end portions 3a, 3a are larger than the step member insertion hole 2f. A locking portion 3b having a diameter is formed.
ステップ部材３には、両端部３ａ，３ａ附近が剛性の部
材からなり、中央部３ｃが可撓性の部材からなる芯材９
が埋設されている。図示の実施例においては、芯材９の
剛性の部材は鋼製パイプ９ａであり、可撓性の部材はワ
イヤーロープ９ｂであって、このワイヤーロープ９ｂは
鋼製パイプ９ａ中に延長し、鋼製パイプ９ａはその一部
がかしめられている。ワイヤーロープ９ｂが装填された
鋼製パイプ９ａがかしめられていないステップ部材の部
分のＡ−Ａ線矢視図を第５図（ａ）に、かしめられてい
る部分のＢ−Ｂ線矢視図を第５図（ｂ）に、またワイヤ
ーロープ９ｂが埋設されているステップ部材３の中央部
３ｃのＣ−Ｃ線矢視図を第６図に示す。はしごを昇降す
る際にステップ部材を把み易くするため、第６図に示す
ように、ステップ部材３の中央部３ｃの周囲には、円周
方向に適宜の間隔を置いて複数の突条３ｄ，３ｄ…が長
手方向に形成されている。The step member 3 includes a core material 9 in which both ends 3a and 3a are made of a rigid member and a central portion 3c is made of a flexible member.
Is buried. In the illustrated embodiment, the rigid member of the core 9 is a steel pipe 9a and the flexible member is a wire rope 9b, which extends into the steel pipe 9a A part of the pipe 9a is caulked. The steel pipe 9a loaded with the wire rope 9b is taken along the line AA of the step member in which the steel pipe 9a is not crimped, and FIG. 5 (b), and FIG. 6 shows a view of the central portion 3c of the step member 3 in which the wire rope 9b is embedded, taken along the line CC in FIG. In order to make it easy to grasp the step member when moving up and down the ladder, as shown in FIG. 6, a plurality of ridges 3d are provided around the central portion 3c of the step member 3 at appropriate intervals in the circumferential direction. , 3d ... Are formed in the longitudinal direction.
このように構成したはしご１のステップ部材３に上下方
向または横方向の荷重が加わると、ゴム製側柱部２，２
の対向する側壁２ｅ，２ｅがステップ部材３に引張られ
て中央部に寄せられるように変形しステップ部材３はそ
の中央部３ｃが撓む。荷重が取去られると側柱部２，２
およびステップ部材３は原状に復帰する。When a vertical or lateral load is applied to the step member 3 of the ladder 1 configured as described above, the rubber side pillar portions 2, 2
The opposing side walls 2e, 2e of the step member 3 are pulled by the step member 3 and are deformed so as to be moved to the central part, and the central part 3c of the step member 3 is bent. Side columns 2, 2 when the load is removed
And the step member 3 returns to the original state.
上記実施例において、ステップ部材３の芯材９の可撓性
部材はワイヤーロープで形成したが、これに限らず、化
繊ロープ、チェーン、または帯状の部材等充分な強度と
可撓性を有するものであれば他の部材を用いてもよい。
また芯材９の剛性の部材は鋼製のパイプに限らず、棒状
または板状等他の形状のものでもよい。この場合可撓性
の部材を剛性の部材に固定するにはボルト止め、溶接ま
たは当板で押えて取付ける等他の固定方法を用いること
ができる。また上記実施例において、鋼製パイプ９ａの
かしめられる部分の内側にワイヤーロープ９ｂの抜止め
用の凹凸を設けてもよい。また側柱部の形状は角筒に限
らず、断面が他の多角形または円形、楕円形等他の形状
の筒状体でもよい。In the above-mentioned embodiment, the flexible member of the core material 9 of the step member 3 is formed of a wire rope, but not limited to this, a synthetic rope, a chain, or a belt-shaped member having sufficient strength and flexibility. Other members may be used as long as they are.
Further, the rigid member of the core material 9 is not limited to the steel pipe, but may be another shape such as a rod shape or a plate shape. In this case, to fix the flexible member to the rigid member, another fixing method such as bolting, welding, or pressing and attaching the plate can be used. Further, in the above-mentioned embodiment, an unevenness for preventing the wire rope 9b from coming off may be provided inside the portion of the steel pipe 9a to be crimped. Further, the shape of the side pillar portion is not limited to the rectangular tube, and may be a tubular body having a cross section of another polygonal shape, a circular shape, an elliptic shape, or the like.
以上述べたように、本発明によれば、各ゴム製ステップ
部材の両端部は筒状のゴム製側柱部の内部空間内に突出
し、ステップ部材挿通孔よりも大径の係止部が形成され
ており、またステップ部材は中央部が可撓性の部材から
なるものであるから、船の衝突物の落下等大きな衝撃が
ステップ部材に加えられたときは、ステップ部材および
その両端の係止部が当接する筒状のゴム製側柱部はそれ
ぞれ弾性変形し、衝撃が消滅した後直ちに元の形状に復
元し、永久歪が残ることはないから、はしごの寿命を延
ばすことができる。またステップ部材の芯材は両端部が
剛性の部材からなるものであるから、はしごの昇降に際
しステップ部材の沈みが少く、したがって安定性がよ
く、はしごの昇降に際し不安感がない。As described above, according to the present invention, both end portions of each rubber step member project into the inner space of the cylindrical rubber side column portion, and the locking portion having a diameter larger than that of the step member insertion hole is formed. Since the central part of the step member is made of a flexible material, when a large impact such as a collision of a ship is applied to the step member, the step member and both ends of the step member are locked. Each of the cylindrical rubber side column portions with which the portions contact each other elastically deforms, restores its original shape immediately after the impact disappears, and no permanent strain remains, so that the life of the ladder can be extended. Further, since the core material of the step member is made of rigid members at both ends, the step member is less likely to sink when the ladder is moved up and down, and therefore the stability is good, and there is no anxiety when the ladder is moved up and down.
第１図は本発明のはしごのステップ部材の構成を示す図
で第３図Ｄ部の拡大断面図、第２図は本発明のはしごを
岸壁に取付けた状態における平面図、第３図はその正面
図、第４図は第２図の一部拡大図、第５図（ａ）は第１
図のＡ−Ａ線矢視図、第５図（ｂ）は第１図のＢ−Ｂ線
矢視図、第６図は第１図のＣ−Ｃ線矢視図である。 １…はしご、２…側柱部、２ｆ…ステップ部材挿通孔、
３…ステップ部材、３ｂ…係止部、４…側柱の内部空
間、９…芯材FIG. 1 is a view showing the structure of a step member of a ladder of the present invention, and FIG. 3 is an enlarged cross-sectional view of a D portion, FIG. 2 is a plan view of the ladder of the present invention attached to a quay, and FIG. The front view, FIG. 4 is a partially enlarged view of FIG. 2, and FIG.
5 is a view taken along the line AA of FIG. 5, FIG. 5 (b) is a view taken along the line BB of FIG. 1, and FIG. 6 is a view taken along the line CC of FIG. 1 ... Ladder, 2 ... Side column part, 2f ... Step member insertion hole,
3 ... Step member, 3b ... Locking part, 4 ... Side column inner space, 9 ... Core material
Claims (2)
部と、両端部が前記１対の側柱部の対向する壁部に穿設
されたステップ部材挿通孔を通って、前記側柱部の内部
空間内に突出しかつこれら両端部に前記ステップ部材挿
通孔よりも大径の係止部が形成された複数のゴム製ステ
ップ部材とを備え、各ゴム製ステップ部材には、両端部
附近が剛性の部材からなり中央部が可撓性の部材からな
る芯材が埋設されていることを特徴とするゴム製はし
ご。1. A pair of cylindrical side pillars made of rubber arranged in parallel with each other, and both ends passing through step member insertion holes formed in opposite wall portions of the pair of side pillars. , A plurality of rubber step members protruding into the inner space of the side column portion and having locking portions having a diameter larger than that of the step member insertion hole are formed at both ends thereof, and each rubber step member includes A rubber ladder characterized in that a core member made of a rigid member is embedded near both ends and a flexible member is embedded in the central part.
可撓性の部材はワイヤーロープであって、このワイヤー
ロープの各端部を前記鋼製パイプ中に延長し、前記鋼製
パイプをかしめたことを特徴とする請求項１記載のゴム
製はしご。2. The rigid member is a steel pipe, the flexible member is a wire rope, and each end of the wire rope is extended into the steel pipe. The rubber ladder according to claim 1, wherein the rubber ladder is caulked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16321289A JPH066859B2 (en) | 1989-06-26 | 1989-06-26 | Rubber ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16321289A JPH066859B2 (en) | 1989-06-26 | 1989-06-26 | Rubber ladder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0328488A JPH0328488A (en) | 1991-02-06 |
| JPH066859B2 true JPH066859B2 (en) | 1994-01-26 |
Family
ID=15769430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16321289A Expired - Lifetime JPH066859B2 (en) | 1989-06-26 | 1989-06-26 | Rubber ladder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH066859B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2558199B2 (en) * | 1992-03-30 | 1996-11-27 | 太陽工業株式会社 | Ladder for quays |
| JPH06306453A (en) * | 1993-04-16 | 1994-11-01 | Sumitomo Metal Ind Ltd | Method for eliminating skid mark in continuous heating furnace |
| JPH0813968A (en) * | 1994-07-01 | 1996-01-16 | Shirota Tekko Kk | Suspension tool |
| KR20020053779A (en) * | 2002-03-25 | 2002-07-05 | 백수곤 | Composite Ladder |
-
1989
- 1989-06-26 JP JP16321289A patent/JPH066859B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0328488A (en) | 1991-02-06 |
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