JPS63304866A - Composite panel - Google Patents
Composite panelInfo
- Publication number
- JPS63304866A JPS63304866A JP13840987A JP13840987A JPS63304866A JP S63304866 A JPS63304866 A JP S63304866A JP 13840987 A JP13840987 A JP 13840987A JP 13840987 A JP13840987 A JP 13840987A JP S63304866 A JPS63304866 A JP S63304866A
- Authority
- JP
- Japan
- Prior art keywords
- asphalt
- cement
- layer
- fibers
- nonwoven fabric
- 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.)
- Granted
Links
- 239000002131 composite material Substances 0.000 title claims description 25
- 239000000463 material Substances 0.000 claims description 51
- 239000010426 asphalt Substances 0.000 claims description 30
- 239000000203 mixture Substances 0.000 claims description 26
- 239000004745 nonwoven fabric Substances 0.000 claims description 20
- 239000004568 cement Substances 0.000 claims description 15
- 238000004078 waterproofing Methods 0.000 claims description 7
- 238000010030 laminating Methods 0.000 claims description 4
- 239000000835 fiber Substances 0.000 description 26
- 238000000034 method Methods 0.000 description 12
- 239000000843 powder Substances 0.000 description 6
- 230000003014 reinforcing effect Effects 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 229920000728 polyester Polymers 0.000 description 5
- 230000014759 maintenance of location Effects 0.000 description 4
- 239000011083 cement mortar Substances 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- -1 etc. Substances 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000011396 hydraulic cement Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000010345 tape casting Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 238000007765 extrusion coating Methods 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Glass Compositions (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明はセメント系硬化物板を基材とした複合板、よ
り詳細には防水性と釘の引抜保持力を備えた屋根等の下
地材として用い好適な複合板に関する。[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a composite board based on a cement-based cured board, and more specifically, to a base material for roofs, etc., which is waterproof and has the ability to retain nails when pulled out. The present invention relates to a composite plate suitable for use as a composite plate.
建築物の下地材、例えば屋根の下地材としては、従来、
木造建築の場合、野地板の上にアスファルトルーフィン
グを敷設し、その上に瓦等の屋根材を配置しているが、
この工法の場合、野地板に釘打ち瓦の固定が可能である
が、野地板が湿気で腐りルーフィングも湿気で結露し、
防水性の信顛性が低い。又、コンクリート造、ＡＬＣ建
築で瓦を配置する場合は湿気による腐食はないが釘打ち
が出来ず防水性もない。釘打ちが可能なモルタル（例え
ばスカイモルタル）の場合でもアスファルトルーフイン
グ等を敷設した後屈を釘打ちして取付けるが、打設後−
週間位の養成期間が必要であり、釘の引抜保持力が小さ
く、軒先部分等では木材を取付けて木材に瓦を固定し、
その欠点を補なう必要がある等多くの問題点がある。Conventionally, as base materials for buildings, such as roof base materials,
In the case of wooden buildings, asphalt roofing is laid on top of the field boards, and roofing materials such as tiles are placed on top of it.
With this construction method, it is possible to fix nailed tiles to the roofing boards, but the roofing boards rot due to moisture and the roofing also condenses due to moisture.
Waterproof reliability is low. Furthermore, when tiles are placed in a concrete or ALC building, there is no corrosion due to moisture, but nailing cannot be done and the tiles are not waterproof. Even in the case of mortar that can be nailed (for example, sky mortar), the back bend of asphalt roofing etc. is installed by nailing, but after the nailing -
A training period of about a week is required, and the pull-out retention force of nails is small, so in areas such as the eaves, wood is attached and tiles are fixed to the wood.
There are many problems such as the need to compensate for these shortcomings.
この発明は上記問題点に着目しなされたものである。そ
の目的は防水性に優れ、釘の引抜保持力が高い建築物の
下地材として用い好適な複合板を提案するにある。This invention has been made in view of the above-mentioned problems. The purpose is to propose a composite board that is suitable for use as a base material for buildings, which has excellent waterproof properties and high nail retention ability.
この複合板は、セメント系硬化物板とその表面に配した
防水材層とを積層固着してなり、前記防水材層はアスフ
ァルトを主体とする母材と補強用短繊維とが均一に分散
混合した密実な厚み３Ｍ以上のアスファルトｍ成物層の
両面に不織布が積層してあることを特徴とする。This composite board is made by laminating and fixing a cement-based hardened material board and a waterproofing material layer placed on its surface, and the waterproofing material layer is a uniformly dispersed mixture of a base material mainly composed of asphalt and reinforcing short fibers. It is characterized by having a nonwoven fabric laminated on both sides of a dense asphalt compound layer with a thickness of 3M or more.
この複合板のアスファルト組成物層は常温において固体
あるいは半固体であるブローンアスファルト（例えば針
入度（Ｊ Ｉ Ｓ、 Ｋ２５３０） １０〜２０）、
ゴムアスファルト（例えば針入度４０〜１００）、ギル
ツナイト（例えば針入度０）、合成樹脂等を配合した改
良アスファルト等、あるいはアスファルト類に炭酸カル
シウム等の無機粉末、エチレン酢酸ビニル共重合物発泡
体等の合成樹脂粉末、あるいはゴムタイヤ粉末等を添加
したアスファルト混合物を母材とする。The asphalt composition layer of this composite board is made of blown asphalt that is solid or semi-solid at room temperature (for example, penetration rate (JIS, K2530) 10 to 20),
Rubber asphalt (for example, penetration is 40 to 100), giltstone (for example, penetration is 0), improved asphalt mixed with synthetic resin, etc., or asphalt with inorganic powder such as calcium carbonate, ethylene vinyl acetate copolymer foam, etc. The base material is an asphalt mixture to which synthetic resin powder such as or rubber tire powder is added.
母材に混合する補強用短繊維は綿リンク−（繊維長２〜
１５ＩＩＩｌ）、粗編等の天然繊維、ポリエステル繊維
、ポリピロピレン繊維（例えば１〜５デニール、繊維長
２〜１５ｍｍ）等の合成繊維、石綿等の無機繊維である
。これら繊維は通常、２０ｍｍ以下の短い繊維長となし
、溶融状態の母材中に均一に分散せしめた後、厚み３Ｉ
ＩＩＩＩ＋以上の密実なアスファルト組成物層とする。The reinforcing short fibers to be mixed into the base material are cotton links (fiber length 2~
15III), coarsely knitted natural fibers, polyester fibers, synthetic fibers such as polypropylene fibers (for example, 1 to 5 denier, fiber length 2 to 15 mm), and inorganic fibers such as asbestos. These fibers are usually short in length, 20 mm or less, and after being uniformly dispersed in the molten base material, the fibers are distributed to a thickness of 3I.
A dense asphalt composition layer of III+ or higher.
混入する補強用短繊維の量は、繊維と母材とが均質に混
合し、気泡や空隙がない密実な組繊を形成する範囲で多
い量が好ましい。繊維の割合が多すぎると繊維間を充填
する母材の星が不足し、密実な組織のアスファルト組成
物層を形成することができない。また、少なすぎると母
材を拘束する力が不足し、釘の引抜保持力を高くするこ
とができない。アスファルト組成物層に占める短繊維の
割合は繊維の密度、嵩高さ、アスファルトの流動性、硬
さ、添加物の量、質等の影響を受けるが通常５〜４０％
（重量）である。The amount of the reinforcing short fibers to be mixed is preferably as large as possible so that the fibers and the base material are homogeneously mixed to form a dense composite fiber without air bubbles or voids. If the proportion of fibers is too high, there will be insufficient matrix stars filling the spaces between the fibers, making it impossible to form an asphalt composition layer with a dense structure. On the other hand, if the amount is too small, the force for restraining the base material will be insufficient, making it impossible to increase the pulling and retaining force of the nail. The proportion of short fibers in the asphalt composition layer is influenced by the fiber density, bulk, asphalt fluidity, hardness, amount and quality of additives, etc., but is usually 5 to 40%.
(weight).
アスファルト組成物層の厚みは３ｍ以上である。３ＩＩ
１１未満では釘を保持する層が薄すぎ高い引抜保持力を
期待できない。好ましくは５１以上、打込む釘の深さに
見合った厚みであり、通常その厚みは５〜３０ｍの範囲
である。The thickness of the asphalt composition layer is 3 m or more. 3II
If it is less than 11, the layer that holds the nail is too thin and a high pull-out retention force cannot be expected. The thickness is preferably 51 or more and is commensurate with the depth of the nail to be driven, and usually the thickness is in the range of 5 to 30 m.
この複合板に用いる不織布は湿式法、乾式法、ニードル
パンチ法、ステインチボンド法、スパンボンド法等いず
れの方法のものでもよいが、スパンボンド法による不織
布が好適であり、就中、ポリエステル繊維を主材とする
スパンボンド不織布は溶融アスファルト温度に耐える耐
熱性、寸法安定性をもち、加工性が優れ、アスファルト
組成物層によく密着して被覆、保護し、かつ低コストで
取扱性が優れ好適である。The non-woven fabric used for this composite board may be made by any method such as wet method, dry method, needle punch method, stain bond method, spun bond method, etc., but non-woven fabric made by spun bond method is preferable, especially polyester fiber The spunbond nonwoven fabric, which is mainly made of suitable.
この複合板の防水材層を製造するには、例えば下記の方
法による。主材となるアスファルトに無機粉末、合成樹
脂粉末等を所定量混合した母材を加熱溶融し、これに補
強用短繊維を混合し、全体を均一に分散せしめ、溶融状
態の混合物を不織布上に、ドクターナイフコート法等で
所要の厚みにコーティングし、その上面に不織布を貼り
合せる。不織布はこの工程において溶融状態、あるいは
半溶融状態のアスファルト組成物層に貼り合せることに
より強固に接着し防水材層を形成する。The waterproof material layer of this composite board can be manufactured, for example, by the following method. A base material made by mixing a predetermined amount of inorganic powder, synthetic resin powder, etc. with the main material asphalt is heated and melted, reinforcing short fibers are mixed into this, the whole is uniformly dispersed, and the molten mixture is spread on a nonwoven fabric. , coat it to the required thickness using a doctor knife coating method, etc., and then attach a nonwoven fabric to the top surface. In this step, the nonwoven fabric is bonded firmly to the asphalt composition layer in a molten or semi-molten state to form a waterproof material layer.
溶融状態のアスファルト混合物を不織布上にドクターナ
イフコート法あるいはスリットダイからの押出コート法
等でアスファルト組成物層を形成すると、溶融状態の混
合物はドクターナイフあるいはスリットダイ等で拘束さ
れて流動し、混入した補強用短繊維は水平方向に配向す
る。この様に配向した繊維はアスファルト組成物層を横
方向に強く拘束し、打込んだ釘の引抜保持力の向上、お
よびアスファルト組成物層の強度を高める上で効果が大
である。When an asphalt composition layer is formed on a nonwoven fabric using a doctor knife coating method or an extrusion coating method using a slit die, the molten mixture is restrained by the doctor knife or slit die, flows, and becomes mixed. The reinforced short fibers are oriented horizontally. The fibers oriented in this manner strongly restrain the asphalt composition layer in the lateral direction, and are highly effective in improving the pulling force of a driven nail and increasing the strength of the asphalt composition layer.
このようにして製造した防水材層は接着剤、例えばエポ
キシ接着剤を用いセメント系硬化物板に接着し複合板と
する。第１図はこの様にしてつくったこの発明になる複
合板であり、アスファルト組成物層１の両面に不繊布２
．２が積層してなる防水材層３とセメント系硬化物板４
とを接着剤５で接着し構成されている。The waterproof material layer thus produced is adhered to a cement-based cured material board using an adhesive, such as an epoxy adhesive, to form a composite board. Figure 1 shows a composite board according to the present invention produced in this manner, in which two nonwoven fabrics are coated on both sides of the asphalt composition layer 1.
．． A waterproofing material layer 3 and a cement-based hardened material board 4 formed by laminating 2
and are bonded together with an adhesive 5.
また、防水材層に接し水硬性セメント組成物を打設し、
これを固化せしめてセメント系硬化物板と防水材層とが
積層固着した複合板をっくることができる。第２図はこ
の様にしてつくったこの発明になる複合板であり、アス
ファルト組成物層ｌの両面に不織布２．２が積層してな
る防水材層３とセメント系硬化物板４とは両者の界面に
ある不織布２に浸透し硬化したセメント系硬化物６を介
し接着し構成されている。In addition, a hydraulic cement composition is placed in contact with the waterproof material layer,
By solidifying this, a composite board in which a cement-based cured material board and a waterproofing material layer are laminated and fixed can be obtained. FIG. 2 shows a composite board according to the present invention produced in this manner, in which both the waterproof material layer 3 and the cement-based cured material board 4 are formed by laminating the nonwoven fabric 2.2 on both sides of the asphalt composition layer 1. It is constructed by adhering through a cement-based cured material 6 that has permeated into the nonwoven fabric 2 at the interface and hardened.
このほか、例えば第３図のごとく防水材層３の片面に凹
溝７、凸条８を交互に形成しておき、この面に接して水
硬性セメント組成物を打設して複合板をつくることがで
きる。防水材層３とセメント系硬化物板４とは入り組ん
だ凹凸状界面において、不織布２に浸透し硬化したセメ
ント系硬化物６を介し一層強固に固着せしめることがで
きる。In addition, for example, as shown in Fig. 3, grooves 7 and protrusions 8 are alternately formed on one side of the waterproof material layer 3, and a hydraulic cement composition is cast in contact with this surface to create a composite board. be able to. The waterproof material layer 3 and the cement-based cured material plate 4 can be more firmly fixed to each other at the intricately uneven interface via the cement-based cured material 6 that has penetrated into the nonwoven fabric 2 and hardened.
第３図はこの様に構成してなった複合板を屋根下地材と
して建物躯体上に取付け、その上に板状の瓦９を釘１０
を打込み係止して敷設してなった屋根である。Figure 3 shows that the composite board constructed in this way is installed on the building frame as a roof base material, and a plate-shaped tile 9 is attached with nails 10 on top of it.
The roof is made by driving and locking.
なお、この複合板のセメント系硬化物板には必要に応じ
鉄筋、ラス金網等を埋設し補強することができることは
云うまでもない。It goes without saying that the cement-based hardened material board of this composite board can be reinforced by embedding reinforcing bars, lath wire mesh, etc., if necessary.
この発明は以上の構成からなる。この複合板のアスファ
ルト組成物層は母材と補強用短繊維とが均一に分散混合
した密実な厚み３１ｍ１１以上の層であり、水を透過せ
ず高い防水性能をもっている。また、この層は釘の打込
みができ、打込んだ釘は補強繊維で拘束されたアスファ
ルト母材および交絡する繊維の抵抗を受けて高い引抜保
持力を発揮する。アスファルト組成物層の両面には不織
布が積層しであるため組成物層に亀裂や破断が起り難い
。セメント系硬化物板との界面に不織布が存在するので
、接着剤あるいは水硬化性セメント組成物をこの市内に
浸透硬化せしめることにより、硬化物板とアスファルト
組成物層との接着強度を著しく強固なものとすることが
できる。This invention consists of the above configuration. The asphalt composition layer of this composite board is a dense layer with a thickness of 31 m or more in which the base material and reinforcing short fibers are uniformly dispersed and mixed, and has high waterproof performance without permeating water. In addition, nails can be driven into this layer, and the driven nails exhibit high pull-out retention strength due to the resistance of the asphalt matrix bound by reinforcing fibers and the intertwined fibers. Since nonwoven fabrics are laminated on both sides of the asphalt composition layer, the composition layer is unlikely to crack or break. Since a nonwoven fabric exists at the interface with the cement-based hardened material board, by infiltrating and hardening the adhesive or water-curing cement composition into this area, the adhesive strength between the hardened material board and the asphalt composition layer is significantly strengthened. It can be made into something.
ポリエステル繊維スパンボンド不織布（目付１００ ｒ
／ポ）の上面に、アスファルト６６．７部、ギルツナイ
ト６．７部、エチレン酢酸ビニル共重合物発泡体粉末ｉ
７． ｓ部、ポリエステル繊維（繊維長ｌＯ〜１５ｍ
ｍ）８．８部の混合物溶融体をドクターナイフ法でコー
ティングして厚み７閣の層を形成し、その上面に前記と
同じポリエステル繊維スパンボンド不織布を貼り合せ厚
み約７．５ ｎ＋ｍの防水材層をつくった。Polyester fiber spunbond nonwoven fabric (basis weight 100 r
/po) 66.7 parts of asphalt, 6.7 parts of giltstone, ethylene vinyl acetate copolymer foam powder i
7. S part, polyester fiber (fiber length lO~15m
m) 8.8 parts of the molten mixture was coated using the doctor knife method to form a layer with a thickness of 7 layers, and the same polyester fiber spunbond nonwoven fabric as above was laminated on the top surface to form a waterproof material with a thickness of approximately 7.5 nm+m. I created a layer.
この防水材層の片表面に接してセメントモルタルを打設
し、厚さ５０ＩＴＩＩ１１のセメントモルタル板を形成
した。セメントモルタル板と防水材層は不織布に浸透し
硬化したセメント硬化物を介し強固に固着し複合板を構
成した。Cement mortar was placed in contact with one surface of this waterproof material layer to form a cement mortar board having a thickness of 50ITII11. The cement mortar board and the waterproofing material layer were firmly adhered to each other through the hardened cement material that penetrated into the nonwoven fabric and hardened to form a composite board.
この複合板は屋根下地材として建物躯体に取付け、その
上に瓦、金属板等の屋根材を釘打ちして取付けができた
。This composite board was attached to the building frame as a roof base material, and roofing materials such as tiles and metal plates could be nailed onto it.
〔発明の効果〕
この発明は以上の通りであり、この複合板はコンクリー
ト造等の建築物躯体に屋根下地材あるいは床下地材等と
して取付け、その上に直接釘打ちして屋根材あるいは床
材を取付けができ、同時に高い防水性を付与することが
できる。また、アスファルト組成物層により遮音性、断
熱性、衝撃吸収等の機能を高めることができる。[Effects of the Invention] The present invention is as described above, and this composite plate is attached to a building frame made of concrete as a roof base material or floor base material, etc., and nailed directly onto it to form a roofing material or a floor material. can be installed, and at the same time can provide high waterproofness. Furthermore, the asphalt composition layer can enhance functions such as sound insulation, heat insulation, and shock absorption.
第１図、第２図（ａ）はそれぞれこの発明になる複合板
の断面図、第２図（ｔ））は（ａ）図の界面不織布部分
の拡大断面図、第３図は上面に瓦を敷設した複合板の断
面図である。
１・・・アスファルト組成物層、２・・・不織布、３・
・・防水材層、４・・・セメント系硬化物板、５−・・
接着剤、６・・・浸透固化した硬化物、７・・・凹溝、
８・・・突条、９・・・瓦、１０・・・釘。Figures 1 and 2 (a) are cross-sectional views of the composite board according to the present invention, Figure 2 (t) is an enlarged cross-sectional view of the interfacial nonwoven fabric portion of Figure (a), and Figure 3 is a sectional view of the composite board according to the present invention. FIG. 2 is a sectional view of a composite board on which a 1... Asphalt composition layer, 2... Nonwoven fabric, 3...
...Waterproofing material layer, 4...Cement-based hardened material board, 5-...
Adhesive, 6... Penetrated cured product, 7... Concave groove,
8...Protrusion, 9...Tile, 10...Nail.
Claims (1)
とを積層固着してなり、前記防水材層はアスファルトを
主体とする母材と補強用短繊維とが均一に分散混合した
密実な厚み３ｍｍ以上のアスファルト組成物層の両面に
不織布が積層してあることを特徴とする複合板。(1) It is made by laminating and fixing a cement-based cured material board and a waterproofing material layer placed on its surface. A composite board characterized in that a nonwoven fabric is laminated on both sides of an asphalt composition layer having a thickness of 3 mm or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62138409A JP2552289B2 (en) | 1987-06-02 | 1987-06-02 | Composite board for building base material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62138409A JP2552289B2 (en) | 1987-06-02 | 1987-06-02 | Composite board for building base material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63304866A true JPS63304866A (en) | 1988-12-13 |
| JP2552289B2 JP2552289B2 (en) | 1996-11-06 |
Family
ID=15221285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62138409A Expired - Lifetime JP2552289B2 (en) | 1987-06-02 | 1987-06-02 | Composite board for building base material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2552289B2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5930100U (en) * | 1982-08-17 | 1984-02-24 | 土屋 健吾 | Updown keeper |
| JPS6010852U (en) * | 1983-07-04 | 1985-01-25 | スズキ株式会社 | Piston for 2-stroke engine |
| JPS60152561A (en) * | 1984-01-19 | 1985-08-10 | Nichireki Chem Ind Co Ltd | Asphalt molding |
-
1987
- 1987-06-02 JP JP62138409A patent/JP2552289B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5930100U (en) * | 1982-08-17 | 1984-02-24 | 土屋 健吾 | Updown keeper |
| JPS6010852U (en) * | 1983-07-04 | 1985-01-25 | スズキ株式会社 | Piston for 2-stroke engine |
| JPS60152561A (en) * | 1984-01-19 | 1985-08-10 | Nichireki Chem Ind Co Ltd | Asphalt molding |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2552289B2 (en) | 1996-11-06 |
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