JPH0243399Y2 - - Google Patents
Info
- Publication number
- JPH0243399Y2 JPH0243399Y2 JP1986097517U JP9751786U JPH0243399Y2 JP H0243399 Y2 JPH0243399 Y2 JP H0243399Y2 JP 1986097517 U JP1986097517 U JP 1986097517U JP 9751786 U JP9751786 U JP 9751786U JP H0243399 Y2 JPH0243399 Y2 JP H0243399Y2
- Authority
- JP
- Japan
- Prior art keywords
- vinyl acetate
- cushion material
- board
- leaf spring
- footboard
- 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
Links
- 239000000463 material Substances 0.000 claims description 23
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 14
- 239000006260 foam Substances 0.000 claims description 13
- 229920005989 resin Polymers 0.000 claims description 13
- 239000011347 resin Substances 0.000 claims description 13
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 claims description 11
- 238000005187 foaming Methods 0.000 claims description 11
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 11
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 5
- 239000011120 plywood Substances 0.000 claims description 4
- 239000002023 wood Substances 0.000 claims description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 2
- 229920002554 vinyl polymer Polymers 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 description 12
- 230000035939 shock Effects 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000000704 physical effect Effects 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Landscapes
- Road Paving Structures (AREA)
- Laminated Bodies (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
この考案は、例えば跳び箱や跳馬等の踏切り時
に使用される踏切板に関する。[Detailed Description of the Invention] Industrial Field of Use This invention relates to a take-off board used, for example, at a take-off of a vaulting box, vaulting horse, or the like.
従来の技術
従来、この種の踏切板として、例えば実公昭58
−8265号公報に示されるように、敷板の基端部と
踏板の基端部とが連結固定され、かつ前記敷板と
前記踏板との間に板バネが配設されてなるものが
広く使用されている。このような構造を有する踏
切板にあつては、踏板上に競技者が跳び乗ること
により、板バネが弾性変形して押し上げ方向への
力を蓄積するものである。Conventional technology Conventionally, as this type of railroad crossing board, for example,
As shown in Publication No. 8265, a structure in which the base end of a tread plate and the base end of a tread plate are connected and fixed, and a leaf spring is disposed between the tread plate and the tread plate is widely used. ing. In a takeoff board having such a structure, when a player jumps onto the board, the leaf spring is elastically deformed and accumulates force in the upward direction.
考案が解決しようとする問題点
ところで、この種の踏切板は児童を対象にした
所謂ジユニア用から一般競技用まで広く使用され
ており、使用対象者に応じた所定の反発弾性およ
び衝撃吸収性を有するものであることが要求され
る。もし、子供等の比較的体重の軽い者が、堅め
のものを使用しても充分な反発力は得られない
し、逆に大人等の比較的体重の重い者が柔らか過
ぎるものを使用しても充分な反発力は得られな
い。Problems that the invention aims to solve By the way, this type of railroad crossing board is widely used from so-called gymnasiums aimed at children to general competitions. It is required that the person has the following. If a relatively light person such as a child uses a stiff material, sufficient repulsion may not be obtained, and conversely, if a relatively heavy person such as an adult uses a material that is too soft. Sufficient repulsive force cannot be obtained.
このようなことから、従来、使用者に適した踏
切板を得るために、それぞれに応じた反発弾性を
有する板バネが使用されていた。 For this reason, conventionally, in order to obtain a takeoff board suitable for each user, leaf springs having repulsion elasticity suitable for each user have been used.
しかしながら、そのような各種の板バネを製作
することは面倒であつて製造能率が悪く、ひいて
は製品のコストアツプを招いていたのみならず、
反発弾性の微妙な調整も極めて困難なものであつ
た。 However, manufacturing such various leaf springs is troublesome and inefficient, which not only increases the cost of the product.
Fine adjustment of rebound resilience was also extremely difficult.
この考案は、上述のような問題点を解消するた
めになされたものであつて、構成の簡易なもので
ありながら、所期する優れた反発弾性および衝撃
吸収性を有するものを容易に製造し得るようにな
された踏切板を提供することを目的とするもので
ある。 This invention was devised to solve the above-mentioned problems, and although it has a simple structure, it can be easily manufactured to have the desired excellent impact resilience and shock absorption. The object of the present invention is to provide a railroad crossing board that is designed to obtain the following characteristics.
問題点を解決する為の手段
而して、この考案に係る踏切板は、踏板に、複
数の相互に物性を異にしたクツシヨン体を積層状
態に設けることにより、底つき感が少なくてしか
もそれ自体反撥弾性の優れたものにする一方、併
せて、踏板の先端部と板バネの先端部との間に複
数個の弾性ブロツクを介在させ、その個数、間
隔、形状および大きさを適宜設定することによ
り、任意の反発弾性および衝撃吸収性を得るよう
にしたものである。Means for Solving the ProblemsThe takeoff board according to this invention has a plurality of cushion bodies having different physical properties, which are stacked on the step board, to reduce the feeling of bottoming out, and to reduce the feeling of bottoming out. While making the spring itself highly resilient, a plurality of elastic blocks are interposed between the tip of the tread and the tip of the leaf spring, and the number, spacing, shape, and size of the blocks are set appropriately. By doing so, desired rebound resilience and shock absorption properties can be obtained.
即ち、この考案は、敷板１，１の基端部１ａ，
１ａと踏板２の基端部２ａとが連結固定され、か
つ前記敷板１と前記踏板２との間に板バネ３が配
設されてなる踏切板において、
前記踏板２は、上方に僅かに弯曲状の木質合板
からなる踏板本体５と、その上面に貼着されたゴ
ム含有量10〜20％、発泡倍率４〜７倍の柔軟な独
立気泡のゴム添加エチレンビニルアセテート樹脂
発泡体シートからなる第１クツシヨン材６と、更
にその上面に貼着された酢酸ビニル含有量25〜28
％、発泡倍率14〜15倍の酢酸ビニル添加エチレン
ビニルアセテート樹脂発泡体シートからなる第２
クツシヨン材７と、更にまたその上面に貼着され
たカーペツト８とで構成されると共に、
前記板バネ３の先端部３ｂと前記踏板２の先端
部２ｂとの間にそれらの幅方向に沿つて、ゴム含
有量10〜20％、発泡倍率４〜７倍の柔軟な独立気
泡のゴム添加エチレンビニルアセテート樹脂低発
泡体からなる複数個の弾性ブロツク４……が相互
間に所定間隔を置いて介在装着されてなることを
特徴とする踏切板を要旨とするものである。 That is, in this invention, the base end portions 1a of the bottom plates 1, 1,
1a and the base end 2a of the tread plate 2 are connected and fixed, and a leaf spring 3 is disposed between the tread plate 1 and the tread plate 2, in which the tread plate 2 is slightly curved upward. The tread body 5 is made of wooden plywood in the form of a shape, and the tread board body 5 is made of a flexible closed-cell rubber-added ethylene vinyl acetate resin foam sheet with a rubber content of 10 to 20% and a foaming ratio of 4 to 7 times. 1 cushion material 6 and vinyl acetate content 25 to 28 affixed to its upper surface
%, a second foam sheet made of vinyl acetate-added ethylene vinyl acetate resin with a foaming ratio of 14 to 15 times.
It is composed of a cushion material 7 and a carpet 8 attached to the upper surface of the cushion material 7, and a carpet 8 is provided between the tip 3b of the leaf spring 3 and the tip 2b of the treadle 2 along the width direction thereof. , a plurality of elastic blocks 4 made of flexible, closed-cell rubber-added ethylene vinyl acetate resin low foam with a rubber content of 10 to 20% and a foaming ratio of 4 to 7 times are interposed at predetermined intervals. The gist of this invention is a railroad crossing board that is characterized by being attached to the board.
実施例 この考案を、図示実施例に基づいて説明する。Example This invention will be explained based on illustrated embodiments.
第１図ないし第３図に示す実施例において、１
は敷板、２は踏板、３は板バネ、４は弾性ブロツ
クである。 In the embodiment shown in FIGS. 1 to 3, 1
2 is a footboard, 3 is a leaf spring, and 4 is an elastic block.
前記敷板１，１は、上方に多少湾曲形成された
帯状の積層板材からなり、その前後端の下面に滑
り止め部材１０，１０が適宜固着されたもので、
所定間隔を隔てて平行に配設されている。 The bottom plates 1, 1 are made of a band-shaped laminated plate material that is slightly curved upward, and anti-slip members 10, 10 are appropriately fixed to the lower surfaces of the front and rear ends thereof,
They are arranged in parallel at predetermined intervals.
そして、上記敷板１，１に覆い被せるようにし
て前記踏板２が配設され、これら両板１，１，２
の各基端部１ａ，１ａ，２ａどおしがボルトによ
り締結されている。 The footboard 2 is disposed so as to cover the footboards 1, 1, and both the boards 1, 1, 2
The respective proximal end portions 1a, 1a, 2a are fastened together with bolts.
上記踏板２は、上方に多少湾曲形成された木質
合板からなる踏板本体５の上面に、ゴム含有量10
〜20％、発泡倍率４〜７倍の柔軟な独立気泡のエ
チレンビニルアセテート（EVA）樹脂低発泡体
シートからなる約１cm厚さの第１クツシヨン材６
が貼着され、かつその上面に酢酸ビニル含有量25
〜28％、発泡倍率14〜15倍のエチレンビニルアセ
テート（EVA）樹脂低発泡体シートからなる約
１cm厚さの第２クツシヨン材７が貼着され、更に
その上面にカーペツト８が貼着されている。この
ようにクツシヨン材６，７の層を設けることによ
つて、反発弾性および衝撃吸収性の両機能を調和
満足させて踏切時に所謂底つき感の少ないものと
なされている。 The above-mentioned tread plate 2 has a rubber content of 10% on the upper surface of the tread body 5 made of wood plywood which is slightly curved upward.
The first cushion material 6 is approximately 1 cm thick and is made of a flexible closed cell ethylene vinyl acetate (EVA) resin low foam sheet with a foaming ratio of ~20% and a foaming ratio of 4 to 7 times.
is pasted, and its top surface has a vinyl acetate content of 25
A second cushion material 7 with a thickness of approximately 1 cm made of a low foam sheet of ethylene vinyl acetate (EVA) resin with a foaming ratio of ~28% and a foaming ratio of 14 to 15 times is adhered, and a carpet 8 is further adhered to the upper surface of the second cushion material 7. There is. By providing the layers of cushioning materials 6 and 7 in this manner, both the rebound resilience and shock absorbing functions are harmoniously satisfied, thereby reducing the so-called feeling of bottoming out during a takeoff.
上記踏板２と敷板１，１との間には、板バネ３
が配設されている。 A leaf spring 3 is provided between the tread plate 2 and the bottom plates 1, 1.
is installed.
この板バネ３は、側面視がゆるやかなＳ字状と
なるように曲成された積層板材からなるもので、
その基端部３ａが前記敷板１，１の長さ方向の中
間部よりもやや先端側に寄せた位置においてネジ
９で固定されている。 This leaf spring 3 is made of laminated plate material that is bent so that it has a gentle S-shape when viewed from the side.
The base end portion 3a is fixed with a screw 9 at a position slightly closer to the tip side than the intermediate portion in the length direction of the bottom plates 1,1.
一方、その板バネ３の先端部３ｂと前記踏板２
の先端部２ｂとの間には、それらの幅方向に沿つ
て所定の間隔毎に複数個の弾性ブロツク４……が
介在され適宜固定されている。 On the other hand, the tip 3b of the leaf spring 3 and the tread plate 2
A plurality of elastic blocks 4 are interposed at predetermined intervals along the width direction between the elastic blocks 4 and the tip 2b, and are fixed as appropriate.
この弾性ブロツク４の大きさ、形状、間隔およ
び個数は、踏切板全体として所期する反発弾性お
よび衝撃吸収性に応じて適宜設定されるものであ
る。 The size, shape, spacing, and number of the elastic blocks 4 are appropriately set according to the desired rebound resilience and shock absorption properties of the entire railroad crossing board.
例えば、同一の大きさおよび形状の弾性ブロツ
ク４を使用する場合において、子供や女性等、踏
板２をける力の比較的弱い者が使用した場合に好
適な反発弾性の得られるものとするには、弾性ブ
ロツク４……の数を少なくしてそれらの間隔を広
くとれば良い。 For example, when using elastic blocks 4 of the same size and shape, it is desirable to obtain suitable rebound resilience when used by a person such as a child or a woman who has a relatively weak force for pushing the treadle 2. , elastic blocks 4, etc. may be reduced in number and the interval between them may be widened.
逆に、成人男性用等、踏板２をける力の比較的
強い者が使用した場合に好適な反発弾性の得られ
るものとするには、弾性ブロツク４……の数を多
くしてそれらの間隔を狭くすれば良い。 On the other hand, if the tread plate 2 is used by a person with a relatively strong force, such as for an adult male, in order to obtain suitable rebound resilience, the number of elastic blocks 4 should be increased and the spacing between them should be increased. It is better to make it narrower.
具体例として、次のように設定したものを挙げ
ることができる。 As a specific example, the following settings can be given.
子供用としては、踏板２および板バネ３の幅が
600mmのものにおいて、弾性ブロツク４として幅
40mm×長さ60mm×高さ60mmの直方体に形成された
ものを11個用い、それら相互の間隔を全て16mmに
設定する。 For children, the width of the tread 2 and leaf spring 3 is
For 600mm, width as elastic block 4
Eleven rectangular parallelepipeds of 40 mm x length 60 mm x height 60 mm are used, and the mutual spacing between them is all set to 16 mm.
女性用としては、踏板２および板バネ３の幅が
600mmのものにおいて、弾性ブロツク４として幅
40mm×長さ55mm×高さ60mmの直方体に形成された
ものを13個用い、中央に位置する弾性ブロツク４
の両側の間隔を10mm、残りの間隔を６mmに設定す
る。 For women, the width of the tread 2 and leaf spring 3 is
For 600mm, width as elastic block 4
Using 13 rectangular parallelepipeds of 40 mm x length 55 mm x height 60 mm, the elastic block 4 is located in the center.
Set the spacing on both sides to 10mm, and the remaining spacing to 6mm.
成人男性用としては、踏板２および板バネ３の
幅が600mmのものにおいて、弾性ブロツク４とし
て幅40mm×長さ65mm×高さ60mmの直方体に形成さ
れたものを12個用い、中央の間隔だけ20mm、残り
の間隔を全て10mmに設定する。 For adult men, when the width of the tread 2 and leaf spring 3 is 600 mm, 12 elastic blocks 4 formed in the shape of a rectangular parallelepiped with a width of 40 mm, a length of 65 mm, and a height of 60 mm are used, and only the center spacing is used. 20mm, and set all remaining intervals to 10mm.
上記各弾性ブロツク４は、踏切時に掛る大きな
荷重により、上下方向に圧縮されて幅方向に膨ら
むため、上記のように、間隔を置いて配列される
ことが必要である。もし、これらを相互に密着さ
せた状態に配列すると、幅方向の膨らみが制約さ
れることとなり、各弾性ブロツク４の有する反発
弾性および衝撃吸収特性が有効に発揮されなくな
つてしまう。 The elastic blocks 4 are compressed in the vertical direction and expanded in the width direction due to the large load applied at the time of a railroad crossing, so it is necessary to arrange them at intervals as described above. If these are arranged in close contact with each other, the bulge in the width direction will be restricted, and the rebound resilience and shock absorption properties of each elastic block 4 will not be effectively exhibited.
上記弾性ブロツク４……の素材としては、反発
弾性および衝撃吸収性の相反する機能を調和満足
させうる柔軟な独立気泡のゴム添加エチレンビニ
ルアセテート（EVA）樹脂低発泡体からなるも
のが用いられる。そのゴム含有量は、10〜20％程
度であることが好ましい。また、発泡倍率は４〜
７倍程度のものが好適に用いられる。発泡倍率が
４倍程度以下であると衝撃吸収性に劣ることとな
り、７倍程度以上であると反発弾性に劣ることと
なるからである。 The material used for the elastic blocks 4 is a flexible, closed-cell, rubber-added ethylene vinyl acetate (EVA) resin low foam that can harmoniously satisfy the conflicting functions of rebound resilience and shock absorption. The rubber content is preferably about 10 to 20%. In addition, the foaming ratio is 4~
About 7 times as large is suitably used. This is because if the foaming ratio is about 4 times or less, the impact absorption property will be poor, and if it is about 7 times or more, the impact resilience will be poor.
特に好適な発泡倍率は、５〜６倍程度である。
そして、その物性値として、
引張り強さ 14 Kgｆ／cm2
（JIS K6301）
伸 び 260 ％
（JIS K6301）
引裂強さ ５ Kgｆ／cm
（JIS K6301）
反発弾性 55 ％
（JIS K6301）
回復率 99.6 ％
（KDK S0607）
繰り返し圧縮永久歪 3.7 ％
（JIS K6767）
の試験結果を得ている。 A particularly suitable expansion ratio is about 5 to 6 times.
The physical properties are as follows: Tensile strength: 14 Kgf/cm 2 (JIS K6301) Elongation: 260% (JIS K6301) Tear strength: 5 Kgf/cm (JIS K6301) Impact resilience: 55% (JIS K6301) Recovery rate: 99.6% (KDK S0607) Test results of repeated compression set of 3.7% (JIS K6767) have been obtained.
ちなみに、前記踏板２の第１クツシヨン材６の
物性値は、上記弾性ブロツク４と同様であつて、
第２クツシヨン材７の物性値（JIS K6767）は、
次のとおりである。 Incidentally, the physical properties of the first cushion material 6 of the footboard 2 are the same as those of the elastic block 4, and
The physical property values (JIS K6767) of the second cushion material 7 are:
It is as follows.
見かけ密度 0.064 ｇ／cm3
引張り強さ 9.6 Kgｆ／cm2
伸 び 170 ％
引裂強さ 2.7 Kgｆ／cm
圧縮永久歪 1.7 ％
圧縮かたさ 0.46 Kgｆ／cm2
反発弾性 54.6 ％
繰り返し圧縮永久歪 1.0 ％
第４図および第５図は、弾性ブロツクの配列状
態の変形例を示すものである。Apparent density 0.064 g/cm 3 Tensile strength 9.6 Kgf/cm 2 Elongation 170% Tear strength 2.7 Kgf/cm Compression set 1.7% Compression hardness 0.46 Kgf/cm 2 Rebound resilience 54.6% Repeated compression set 1.0% 4th The figure and FIG. 5 show a modification of the arrangement of the elastic blocks.
第４図に示す踏切板は、中央の弾性ブロツク１
４′のみ、他の弾性ブロツク１４……よりも幅の
狭いものを用いたもので、好適な反発弾性および
衝撃吸収性が得られるようになされている。 The railroad crossing board shown in Fig. 4 consists of a central elastic block 1
Only the elastic block 4' is narrower than the other elastic blocks 14, so that suitable rebound resilience and shock absorption can be obtained.
第５図に示す踏切板は、同一寸法の弾性ブロツ
ク２４を用い、中央部の間隔のみ広くとつたもの
で、好適な反発弾性および衝撃吸収性が得られる
ようになされている。 The railroad crossing board shown in FIG. 5 uses elastic blocks 24 of the same size, with a wider gap only at the center, so as to provide suitable rebound resilience and shock absorption.
考案の効果
この考案に係る踏切板は、敷板２，２の基端部
２ａ，２ａと踏板２の基端部２ａとが連結固定さ
れ、かつ前記敷板１と前記踏板２との間に板バネ
３が配設されてなるものににおいて、先ず、前記
踏板２が、上方に僅かに弯曲状の木質合板からな
る踏板本体５と、その上面に貼着されたゴム含有
量10〜20％、発泡倍率４〜７倍の柔軟な独立気泡
のゴム添加エチレンビニルアセテート樹脂発泡体
シートからなる第１クツシヨン材６と、更にその
上面に貼着された酢酸ビニル含有量25〜28％、発
泡倍率14〜15倍の酢酸ビニル添加エチレンビニル
アセテート樹脂発泡体シートからなる第２クツシ
ヨン材７と、更にまたその上面に貼着されたカー
ペツトとで構成されたものとなされているから、
該踏板自体が、特にその本体の上面側の互いに物
性を異にした第１クツシヨン材６と第２クツシヨ
ン材７の積層配置により、優れた反撥弾性、およ
び衝撃吸収性を有しつゝ、両機能を調和満足させ
て踏切時に所謂底つき感が少なくてしかも良く跳
ねるものとなしうる。Effect of the invention In the level crossing board according to this invention, the base end portions 2a, 2a of the footboards 2, 2 and the base end portion 2a of the footboard 2 are connected and fixed, and a leaf spring is provided between the footboard 1 and the footboard 2. 3, first, the step board 2 has a step board body 5 made of wood plywood that is slightly curved upward, and a rubber content of 10 to 20% and a foamed board attached to the upper surface of the board body 5. A first cushion material 6 made of a flexible closed-cell rubber-added ethylene vinyl acetate resin foam sheet with a magnification of 4 to 7 times, and a vinyl acetate content of 25 to 28% and an expansion ratio of 14 to Since it is made up of a second cushion material 7 made of an ethylene vinyl acetate resin foam sheet containing 15 times as much vinyl acetate, and a carpet attached to the upper surface of the second cushion material 7,
The tread itself has excellent rebound and shock absorption properties, particularly due to the laminated arrangement of the first cushion material 6 and the second cushion material 7, which have different physical properties, on the upper surface side of the main body. By satisfying the functions in harmony, it is possible to reduce the so-called feeling of bottoming out at a railroad crossing and to make it bounce well.
また、前記板バネ３の先端部３ａと前記踏板２
の先端部２ａとの間にそれらの幅方向に沿つて、
反発弾性および衝撃吸収性を有する複数個の弾性
ブロツク４……が相互間に所定間隔をおいて介在
されてなるものであるため、従来行なわれていた
ように特性の異なる板バネ３を用いることなく、
弾性ブロツク４……の大きさ、形状、配列間隔お
よび個数を適宜設定するだけで、全く同一の敷板
１，１、踏板２および板バネ３を有するものであ
りながら、踏切板全体としての反発弾性および衝
撃吸収性を任意に、しかも微妙に設定しうる。 Further, the tip portion 3a of the leaf spring 3 and the tread plate 2
along the width direction between the tip part 2a of the
Since the spring is made up of a plurality of elastic blocks 4 having rebound resilience and shock absorption properties, which are interposed at predetermined intervals, it is not possible to use leaf springs 3 with different characteristics as has been done in the past. Without,
By simply setting the size, shape, arrangement interval, and number of the elastic blocks 4 as appropriate, the rebound resilience of the entire crossing board can be improved even though it has exactly the same footboards 1, treadboards 2, and leaf springs 3. And shock absorption can be set arbitrarily and delicately.
従つて、特性の異なる種々の踏切板を製造する
に際しても、特性の異なる種々の板バネ３を製造
するという面倒な製造作業を省略し得、１種類の
板バネ３と複数個の弾性ブロツク４……を製造す
れば良く、しかもその弾性ブロツク４……は極め
て容易に任意の大きさ、形状に成形することがで
きる柔軟な独立気泡のゴム添加エチレンビニルア
セテート樹脂（EVA）低発泡体からなるもので
あるため、これら構成部材を量産して製造効率の
向上を図ることができ、ひいては製品のコストダ
ウンを図り得る。 Therefore, even when manufacturing various railroad crossing boards with different characteristics, the troublesome manufacturing work of manufacturing various leaf springs 3 with different characteristics can be omitted, and only one type of leaf spring 3 and a plurality of elastic blocks 4 can be used. It is only necessary to manufacture ..., and the elastic block 4 ... is made of a flexible closed-cell rubber-added ethylene vinyl acetate resin (EVA) low foam that can be extremely easily molded into any size and shape. Since these components can be mass-produced, manufacturing efficiency can be improved, and the cost of the product can be reduced.
しかも前記弾性ブロツク４……は、上述のよう
に、独立気泡のゴム添加エチレンビニルアセテー
ト樹脂低発泡体からなる反発弾性および衝撃吸収
特性に優れたものであるから、踏板２の有する前
記のような優れた反撥弾性とも相俟つて、それら
の相乗効果により、いわゆる良く跳ねる、跳躍特
性に極めて優れた耐久性能に富む踏切板を提供す
ることができる。 Moreover, as mentioned above, the elastic blocks 4 are made of a closed-cell rubber-added ethylene vinyl acetate resin low foam and have excellent rebound resilience and shock absorption properties, so that the above-mentioned elastic blocks 4... Coupled with excellent rebound properties, the synergistic effect of these makes it possible to provide a take-off board that bounces well, has extremely excellent jumping characteristics, and is rich in durability.
図面はこの考案の実施例を示すものであり、第
１図は一部切欠き全体斜視図、第２図は第１図
−線の断面図、第３図は弾性ブロツクの配列状
態を示す説明図、第４図および第５図は弾性ブロ
ツクの配列の変形例を示す説明図。
１……敷板、１ａ……基端部、２……踏板、２
ａ……基端部、２ｂ……先端部、３……板バネ、
３ａ……先端部、４，１４，１４′，２４……弾
性ブロツク。
The drawings show an embodiment of this invention, in which Fig. 1 is a perspective view of the whole with a partial cutaway, Fig. 2 is a sectional view taken along the line shown in Fig. 1, and Fig. 3 is an explanation showing the arrangement of elastic blocks. 4 and 5 are explanatory diagrams showing modified examples of the arrangement of elastic blocks. 1... Bottom plate, 1a... Base end portion, 2... Step board, 2
a... Proximal end, 2b... Tip, 3... Leaf spring,
3a... Tip portion, 4, 14, 14', 24... Elastic block.
Claims (1)
部２ａとが連結固定され、かつ前記敷板１と前記
踏板２との間に板バネ３が配設されてなる踏切板
において、 前記踏板２は、上方に僅かに弯曲状の木質合板
からなる踏板本体５と、その上面に貼着されたゴ
ム含有量10〜20％、発泡倍率４〜７倍の柔軟な独
立気泡のゴム添加エチレンビニルアセテート樹脂
発泡体シートからなる第１クツシヨン材６と、更
にその上面に貼着された酢酸ビニル含有量25〜28
％、発泡倍率14〜15倍の酢酸ビニル添加エチレン
ビニルアセテート樹脂発泡体シートからなる第２
クツシヨン材７と、更にまたその上面に貼着され
たカーペツト８とで構成されると共に、 前記板バネ３の先端部３ｂと前記踏板２の先端
部２ｂとの間にそれらの幅方向に沿つて、ゴム含
有量10〜20％、発泡倍率４〜７倍の柔軟な独立気
泡のゴム添加エチレンビニルアセテート樹脂低発
泡体からなる複数個の弾性ブロツク４……が相互
間に所定間隔を置いて介在装着されてなることを
特徴とする踏切板。[Claims for Utility Model Registration] The base end portions 1a, 1a of the footboards 1, 1 and the base end portion 2a of the footboard 2 are connected and fixed, and a leaf spring 3 is disposed between the footboard 1 and the footboard 2. In the level crossing board, the step board 2 has a step board main body 5 made of wood plywood that is slightly curved upward, and a rubber content of 10 to 20% and a foaming ratio of 4 to 7 times, which is pasted on the upper surface. a first cushion material 6 consisting of a flexible closed-cell rubber-added ethylene vinyl acetate resin foam sheet, and a vinyl acetate content of 25 to 28 ml adhered to the upper surface of the first cushion material 6;
%, a second foam sheet made of vinyl acetate-added ethylene vinyl acetate resin with an expansion ratio of 14 to 15 times.
It is composed of a cushion material 7 and a carpet 8 attached to the upper surface of the cushion material 7, and a carpet 8 is provided between the tip 3b of the leaf spring 3 and the tip 2b of the treadle 2 along the width direction thereof. , a plurality of elastic blocks 4 made of flexible, closed-cell rubber-added ethylene vinyl acetate resin low foam with a rubber content of 10 to 20% and a foaming ratio of 4 to 7 times are interposed at predetermined intervals. A railroad crossing board characterized by being installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986097517U JPH0243399Y2 (en) | 1986-06-24 | 1986-06-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986097517U JPH0243399Y2 (en) | 1986-06-24 | 1986-06-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS633854U JPS633854U (en) | 1988-01-12 |
| JPH0243399Y2 true JPH0243399Y2 (en) | 1990-11-19 |
Family
ID=30964531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986097517U Expired JPH0243399Y2 (en) | 1986-06-24 | 1986-06-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0243399Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58175576A (en) * | 1982-01-30 | 1983-10-14 | セノ−株式会社 | Step plate for gymnastics |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60109642U (en) * | 1983-12-27 | 1985-07-25 | 合名会社 上坂鉄工所 | railroad crossing board |
-
1986
- 1986-06-24 JP JP1986097517U patent/JPH0243399Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58175576A (en) * | 1982-01-30 | 1983-10-14 | セノ−株式会社 | Step plate for gymnastics |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS633854U (en) | 1988-01-12 |
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