JPS5812856B2 - Manufacturing method of double-tooth timing belt - Google Patents
Manufacturing method of double-tooth timing beltInfo
- Publication number
- JPS5812856B2 JPS5812856B2 JP51147361A JP14736176A JPS5812856B2 JP S5812856 B2 JPS5812856 B2 JP S5812856B2 JP 51147361 A JP51147361 A JP 51147361A JP 14736176 A JP14736176 A JP 14736176A JP S5812856 B2 JPS5812856 B2 JP S5812856B2
- Authority
- JP
- Japan
- Prior art keywords
- teeth
- belt
- tooth
- manufacturing
- protective coating
- 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
Landscapes
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
本発明は環状のベルトであって、中心線に沿つて抗張体
を有し、これを中心として、その環状の内外面に歯を備
えた両歯タイミングベルトの製造方法と構造に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the production of a double-tooth timing belt, which is an annular belt having a tensile member along the center line and having teeth on the inner and outer surfaces of the annular member. Concerning method and structure.
両歯タイミングベルトは環状のベルトの内外面に備えた
歯で内外面のギアに動力伝達を行うもので、その用途は
広い。A double-tooth timing belt uses teeth on the inner and outer surfaces of an annular belt to transmit power to gears on the inner and outer surfaces, and has a wide range of uses.
しかし、この種ベルトは第１図に見るように、抗張体１
を規準羨する内外面歯の歯底までの寸法ａ−ｂが重要で
あって、円滑な運転のためには、これを正確に製作する
必要があることは周知である。However, as shown in Figure 1, this type of belt has a tensile member 1
It is well known that the dimension a-b from the bottom of the internal and external teeth is important and must be manufactured accurately in order to ensure smooth operation.
また、一般に両歯タイミングベルトの外面歯４と、内面
歯５に対する負荷は同一でなく、負荷の小さい側の歯に
おける保護被覆は負荷の大きい他の歯における保護被覆
と同一のものとする必要はない。Additionally, in general, the loads on the outer teeth 4 and inner teeth 5 of a double-tooth timing belt are not the same, and it is not necessary to make the protective coating on the teeth on the lower load side the same as the protective coating on the other teeth with higher loads. do not have.
通常、両歯タイミングベルトにおいては外面の歯４に対
する負荷は小さい。Normally, in a double-tooth timing belt, the load on the outer teeth 4 is small.
本発明は前記寸法ａ−ｂを正確に製作し得る合理的な両
歯タイミングベルトの製造方法と、負荷に応じた保護被
覆を有し、前記製造方法と密接に関連した両歯タイミン
グベルトの構造に関する。The present invention provides a rational method for manufacturing a double-tooth timing belt that can accurately manufacture the dimensions a-b, and a structure of a double-tooth timing belt that has a protective coating according to the load and is closely related to the manufacturing method. Regarding.
まず、製造方法について説明する。First, the manufacturing method will be explained.
製造方法である工程は、Ａ−Ｃから成る。The steps of the manufacturing method consist of A-C.
すなわち工程Ａは、第２図に示すように、抗張体１の背
部に薄いゴム層６（その厚みをαとする）を設け、その
反対側に内面歯を設けたベルトを前形成し、この内面歯
はその最外層を帆布などのような通常のベルトにおける
保護被覆と同様の保護被覆５を有しており、かつこのベ
ルトにおけるゴム材に対して、少なくとも３／４程通常
の方法で加硫を行い、片面歯付きベルトＸを形成する。That is, in step A, as shown in FIG. 2, a thin rubber layer 6 (its thickness is α) is provided on the back of the tensile member 1, and a belt is preformed with internal teeth on the opposite side. This inner tooth has a protective coating 5 on its outermost layer similar to the protective coating 5 on a normal belt such as canvas, and is coated in a conventional manner by at least 3/4 of the rubber material in this belt. Vulcanization is performed to form a single-sided toothed belt X.
工程Ｂは前記と同様の保護被覆４の裏面に未加硫ゴム７
を充填し、これを所定の外面歯形もしくはこれより若干
太き目の歯形に予め前成形し、前成形の外歯々形体Ｙと
する。In step B, unvulcanized rubber 7 is applied to the back side of the same protective coating 4 as described above.
is filled and preformed into a predetermined external tooth profile or a slightly thicker tooth profile to form a preformed external tooth profile body Y.
なお工程Ａ，Ｂにおいて予め前成形される片面歯付きベ
ルトＸおよび外歯々形体Ｙにおける歯底と抗張体１中心
との寸法ａ，ｂは、ａ＝ｂでかつ後者の歯底と底面８と
の寸法は、（ｂ−α−抗張体の１／２厚さ）となるよう
に、各寸法は正確に作製されるものとする。In addition, the dimensions a and b between the tooth bottom and the center of the tensile member 1 in the single-sided toothed belt Each dimension shall be accurately manufactured so that the dimension with 8 becomes (1/2 thickness of the b-α-tensile member).
工程Ｃは、第４図に示すように、外周面に軸線方向に延
び、前記の片面歯付きベルトＸの内面歯３と相対する歯
形溝１１を有する１対の円筒形のマンドレル１０を含み
、ベルト緊張装置１３付き歯付平板プレス９を有する加
硫装置１２に、該両マンドレル１０の芯間距離Ｌを製造
すべきベルトの長さに適応するように調整した後、片面
歯付きベルトＸをセットする。Step C, as shown in FIG. 4, includes a pair of cylindrical mandrels 10 having tooth profile grooves 11 extending in the axial direction on the outer circumferential surface and facing the inner teeth 3 of the single-sided toothed belt X, A single-sided toothed belt set.
そしてその背部に、前記の外歯々形体Ｙをその歯面が外
方にむくように当てがい、圧力と熱を加えて加硫する。Then, the above-mentioned external tooth shaped body Y is applied to the back thereof so that its tooth surface faces outward, and pressure and heat are applied to vulcanize it.
この際、内外両面の歯の相対位置に充分注意を払うこと
は勿論である。At this time, it goes without saying that sufficient attention should be paid to the relative positions of the teeth on both the inner and outer surfaces.
そしてこの工程で平板プレス９による作業を順次行い、
片面歯付きベルトＸに対して外歯々形体Ｙを一体化する
と共に、全体を加硫する。Then, in this process, the work using the flat plate press 9 is performed sequentially,
The external toothed body Y is integrated with the single-sided toothed belt X, and the whole is vulcanized.
このようにして、工程Ａ−Ｃにより両歯タイミングベル
トは製造される。In this way, a double-tooth timing belt is manufactured through steps A to C.
この製造方法の特徴は内外両歯を最初から一体化して作
るのではなく、片面歯付ベルトと保護被覆付歯形とに分
離してそれぞれ単体で予め前成形しておくこと、片面歯
付ベルト側には抗張体背面に厚さαの薄いゴム層が残さ
れること、両者の接合加硫は歯付平板プレスにて行うこ
とである。The feature of this manufacturing method is that the inner and outer teeth are not made integrally from the beginning, but are separated into a single-sided toothed belt and a protective coated tooth profile and preformed separately, and the single-sided toothed belt side A thin rubber layer with a thickness α is left on the back surface of the tensile member, and the bonding and vulcanization of the two is performed using a toothed flat plate press.
この方法によれば、従来の外金型と内金型の組み合わせ
に熱硬化性樹脂等を流し込んで成形する方法に比らべ、
より正確な歯付ベルトを製造できる。According to this method, compared to the conventional method of pouring thermosetting resin etc. into a combination of an outer mold and an inner mold,
A more accurate toothed belt can be manufactured.
すなわち、従来はポリウレタン等の熱硬化性樹脂を外周
に一定ピッチで歯を設けた内金型と、内周に同じように
歯を設けた外金型との間隙に流し込んで成形する方法が
あるが、これだと金型の製法上どうしても内金型と外金
型の歯のピッチが狂うので、出来上ったベルトもどちら
かの歯のピッチが理論値と異なり、耐久性、音などの面
で不都合かつ不利なものであった。In other words, the conventional method of molding is to pour thermosetting resin such as polyurethane into the gap between an inner mold with teeth arranged at a constant pitch on the outer periphery and an outer mold with teeth similarly arranged on the inner periphery. However, due to the manufacturing method of the mold, the pitch of the teeth of the inner and outer molds will inevitably be incorrect, so the pitch of either tooth of the finished belt will be different from the theoretical value, which will affect durability, noise, etc. It was inconvenient and disadvantageous.
また、歯を設けた平板プレスを上下から前成形していな
い材料に一度にベルトの両面に歯を形成し、順次その個
所を変えて一体化、および加硫していく方法もあるが、
この方法であると、前述の従来例のような金型製作上か
らくる歯のピッチ誤差は生じないが、最終の加硫部分で
、その個所に該当する歯と最初に加硫成形した歯とが互
いに干渉して歯のピッチが狂うことが多く、結果的にベ
ルトの不良率が高くなる。Another method is to use a flat plate press with teeth from above and below to form teeth on both sides of the belt at once on a material that has not been preformed, and then sequentially change the positions and integrate and vulcanize.
With this method, there is no pitch error in the teeth due to mold manufacturing as in the conventional example, but in the final vulcanized part, the teeth corresponding to that part and the initially vulcanized teeth do not occur. often interfere with each other and cause the pitch of the teeth to be out of order, resulting in a high rate of defective belts.
これに反して、本発明方法によれば先に抗張体の背部に
薄いゴム層を残した片面歯付ベルトを加硫成形し、この
ベルトを基準としてその背面に外側の歯部を、所望の相
対関係のもとに設け、それらを平板プレスで加硫成形す
るので、金型から生じるベルト全歯のピッチ誤差も、ま
た従来の平板プレス方式による最終部分での歯の干渉も
なく、内外両面共に正しいピッチの歯をもつタイミング
ベルトが得られる。On the other hand, according to the method of the present invention, a single-sided toothed belt with a thin rubber layer left on the back of the tensile member is first vulcanized and molded, and the outer teeth are formed on the back of the tension member as desired using this belt as a reference. Since these are placed in a relative relationship and vulcanized using a flat plate press, there is no pitch error of all belt teeth caused by the mold, and there is no tooth interference at the final part caused by the conventional flat plate press method. A timing belt with teeth at the correct pitch on both sides can be obtained.
さらに、ベルトにとって重要な寸法である抗張体の中心
から歯底までの寸法ａ，ｂの一致は、その厚さの調整が
容易な片面歯付ベルトの抗張体背面に設ける薄いゴム層
の厚さαを、両面の歯を被覆する被覆の厚み差に応じて
調整することにより、簡単に行えるものである。Furthermore, the matching of the dimensions a and b from the center of the tensile member to the bottom of the teeth, which are important dimensions for belts, is achieved by a thin rubber layer provided on the back surface of the tensile member of a single-sided toothed belt, whose thickness can be easily adjusted. This can be easily done by adjusting the thickness α according to the difference in thickness between the coatings covering the teeth on both sides.
したがって、本発明が保護被覆の厚さに差をもたせた両
歯タイミングベルトの製造方法に特に好適であることが
明らかである。Therefore, it is clear that the present invention is particularly suitable for manufacturing a double-tooth timing belt in which the thickness of the protective coating is varied.
次に、本発明のベルトの構造について述べる。Next, the structure of the belt of the present invention will be described.
第５図、第６図の実施例に見るように、中心線に２一致
する抗張体１を有し、その両面に外面歯２、内面歯３を
一体形成し、全体として環状を成す両歯タイミングベル
トである。As seen in the embodiments shown in FIGS. 5 and 6, it has two tensile members 1 that coincide with the center line, external teeth 2 and internal teeth 3 are integrally formed on both sides, and both sides form an annular shape as a whole. It is a tooth timing belt.
このようなタイミングベルトでは、内側の内面歯に対す
る負荷が外面歯に対する負荷よりも犬であるから、その
保護被覆５を他の保護被覆４よりも厚くする必要がある
。In such a timing belt, the load on the inner inner teeth is greater than the load on the outer teeth, so the protective coating 5 needs to be thicker than the other protective coatings 4.
一方、この種ベルトでは、第５図に示す寸法ａ，ｂを同
一にする必要があるのであるが、本発明では、これを、
内面歯２の保護被覆４は外面歯３の保護被覆５よりも薄
手とし、外面歯２の保護被覆４の下側に、両保護被覆４
，５の厚さの差に相当する厚さのゴムなどの薄い層を設
けることにより、解決している。On the other hand, in this type of belt, it is necessary to make the dimensions a and b shown in FIG. 5 the same, but in the present invention, this is
The protective coating 4 on the inner tooth 2 is thinner than the protective coating 5 on the outer tooth 3, and both protective coatings 4 are placed below the protective coating 4 on the outer tooth 2.
, 5 is solved by providing a thin layer of rubber or the like with a thickness corresponding to the difference in thickness between the two.
以上のように、本発明のベルトでは、両歯タイミングベ
ルトにおいて負荷が異なる内外両歯に負荷が大なる側に
適応させた同一の保護被覆を施こすという従来の不経済
性や、同一強度の保護被覆を施こすと必ず負荷の犬なる
側の歯、すなわち内外面の一方の歯ばかり損傷するとい
う商品イメージ上の苦情を除くことができ、有用性を使
い尽くすことのできるベルトを提供できる。As described above, the belt of the present invention overcomes the conventional uneconomical process of applying the same protective coating to the inner and outer teeth that are subject to different loads in a double-tooth timing belt, and which is adapted to the side with the greater load. It is possible to eliminate complaints about the product image that when a protective coating is applied, the teeth on the dog side of the load, that is, only one of the teeth on the inner and outer surfaces, are damaged, and a belt that can use up its usefulness can be provided.
また実施例において、外面歯２を従動側、内面歯３を駆
動側とするとき薄い保護被覆４を有する外面歯は比較的
変形が容易でベルト起動時など大きな負荷発生時に内外
両歯の損傷を防止し、また負荷を緩衝ｊる機能を発拝す
る。In addition, in the embodiment, when the outer teeth 2 are on the driven side and the inner teeth 3 are on the driving side, the outer teeth with the thin protective coating 4 are relatively easy to deform and prevent damage to both the inner and outer teeth when a large load occurs such as when starting the belt. It has the function of preventing and also buffering the load.
本発明の実施態様において、保護被覆として帆布を採用
したものは、通常の保護被覆の一つである帆布を使用し
たものも本発明に包含することを明示するためである。In the embodiments of the present invention, the use of canvas as a protective covering is intended to clearly indicate that the present invention also includes implementations using canvas, which is one of the usual protective coverings.
また、同じく実施態様として内外面の歯が同一ピッチで
、かつ一致しているものを掲げたのは、本発明の両歯タ
イミングベルトとしてこのような形態のものも包含する
ことを明示したものであり、このようなタイミングベル
トは、歯と歯が一致するために強度面や騒音防止上から
優れたものである。Further, the example in which the teeth on the inner and outer surfaces are at the same pitch and coincide with each other is shown as an embodiment to clearly indicate that the double-tooth timing belt of the present invention includes such a configuration. This kind of timing belt is superior in terms of strength and noise prevention because the teeth match each other.
第１図は一般の両歯タイミングベルトの縦断面図、第２
，３図はそれぞれ本発明製造方法の一過程におけるベル
トの一部縦断面図、第４図は本発明製造方法の一過程を
示す側面図、第５図は本発明の他の実施例の一部縦断面
図、第６図は第５図の要部拡大図である。
主要な記号の説明、１……抗張体、２……外面歯、３…
…内面歯、４，５……保護被覆、６……薄いゴム層、７
……充填材、９……ベルト緊張装置付歯付平板プレス（
加硫装置）。Figure 1 is a longitudinal cross-sectional view of a general double-tooth timing belt, Figure 2
, 3 are partial longitudinal sectional views of the belt in one step of the manufacturing method of the present invention, FIG. 4 is a side view showing one step of the manufacturing method of the present invention, and FIG. 5 is a partial longitudinal sectional view of the belt in one step of the manufacturing method of the present invention. 6 is an enlarged view of the main part of FIG. 5. Explanation of main symbols, 1... Tensile body, 2... External teeth, 3...
...Inner tooth, 4, 5...Protective coating, 6...Thin rubber layer, 7
...Filling material, 9...Toothed flat plate press with belt tensioning device (
vulcanization equipment).
Claims (1)
張体のその反対側に最外層に保護被覆を備えた内面歯を
設けて、片側にのみ歯部を有するベルトを予め前形成し
、これのゴム材を少くとも３／４程加硫して片面歯付き
ベルトＸを製造する工程Ａと、裏側に未加硫ゴムを充填
し、該ゴムと前記の片面歯付きベルトＸの保護被覆より
も前記の薄いゴム層の寸法だけ薄い保護被覆とにより、
外歯々形体Ｙを予め製造する工程Ｂと、 外周面に軸線方向に延び前記片面歯付きベルトＸの内面
歯と相対する歯形溝を有する１対の円筒形のマンドレル
を含み、両マンドレルの芯間距離を製造すべきベルトの
長さに適合させたベルト緊張装置付き歯付平板プレスを
有する加硫装置に前記片面歯付きベルトＸをセットし、
その背部に前記外歯々形体Ｙを当てがい、圧力と熱を加
えて加硫しかつ該両部分ＸとＹとを一体化する工程Ｃと
から成る抗張体の中心から両側の歯底までの寸法が等し
い両歯タイミングベルトの製造方法。[Scope of Claims] 1. A thin rubber layer is provided on the back side of the central tensile member, and inner teeth with a protective coating on the outermost layer are provided on the opposite side of the tensile member, so that only one side has teeth. A step A in which a belt having a rubber material is preformed and at least 3/4 of the rubber material thereof is vulcanized to produce a single-sided toothed belt X; With a protective coating that is thinner by the dimension of the thin rubber layer than the protective coating of the single-sided toothed belt X,
a step B of pre-manufacturing the external toothed body Y; and a pair of cylindrical mandrels having toothed grooves extending in the axial direction on the outer peripheral surface and facing the inner teeth of the single-sided toothed belt X, the cores of both mandrels being The single-sided toothed belt
from the center of the tensile body to the tooth bottoms on both sides, comprising a step C of applying the external tooth shaped body Y to the back thereof, applying pressure and heat to vulcanize it, and integrating the two parts X and Y; A method for manufacturing a double-tooth timing belt with equal dimensions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP51147361A JPS5812856B2 (en) | 1976-12-07 | 1976-12-07 | Manufacturing method of double-tooth timing belt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP51147361A JPS5812856B2 (en) | 1976-12-07 | 1976-12-07 | Manufacturing method of double-tooth timing belt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5371181A JPS5371181A (en) | 1978-06-24 |
| JPS5812856B2 true JPS5812856B2 (en) | 1983-03-10 |
Family
ID=15428454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP51147361A Expired JPS5812856B2 (en) | 1976-12-07 | 1976-12-07 | Manufacturing method of double-tooth timing belt |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5812856B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58163638A (en) * | 1982-03-25 | 1983-09-28 | Mitsuboshi Belting Ltd | Fabricated mold for manufacture of toothed belt made of rubber |
| JPS6157333A (en) * | 1984-07-13 | 1986-03-24 | Nippon Mektron Ltd | Manufacture of belt with both side gear |
| JPS61135717A (en) * | 1984-12-07 | 1986-06-23 | Nippon Mektron Ltd | Manufacture of toothed belt of double-layered structure |
| JPH03129146A (en) * | 1989-10-13 | 1991-06-03 | Yunitsuta Kk | Double toothed belt, method and apparatus for manufacturing same |
| US9169896B2 (en) | 2011-12-14 | 2015-10-27 | Gates Corporation | Apparatus and method for making endless reinforced belts |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49135056A (en) * | 1973-03-01 | 1974-12-26 |
-
1976
- 1976-12-07 JP JP51147361A patent/JPS5812856B2/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49135056A (en) * | 1973-03-01 | 1974-12-26 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5371181A (en) | 1978-06-24 |
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