JP3191812U - tire - Google Patents

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JP3191812U
JP3191812U JP2014002247U JP2014002247U JP3191812U JP 3191812 U JP3191812 U JP 3191812U JP 2014002247 U JP2014002247 U JP 2014002247U JP 2014002247 U JP2014002247 U JP 2014002247U JP 3191812 U JP3191812 U JP 3191812U
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tire
rubber layer
tread portion
elastic rubber
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浩樹 足尾
浩樹 足尾
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株式会社カインズ
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Abstract

【課題】パンク防止機能を備えながら、低コストで製造が容易な手押し運搬車用のタイヤを提供する。【解決手段】本考案に係るタイヤ80のトレッド部36は弾性ゴム層44を内在しており層厚が厚い。このため、尖状物がトレッド部36を容易に貫通せず、タイヤチューブ42のパンクを防止することができる。また、本考案に係るタイヤ80は、トレッド部36のみに弾性ゴム層44を形成するため製造が容易で低コストでの生産が可能である。これにより、パンク防止機能を備えた手押し運搬車用のタイヤ及び、これを備えた手押し運搬車を安価で提供することができる。【選択図】図2PROBLEM TO BE SOLVED: To provide a tire for a hand-held material handling vehicle which is easy to manufacture at low cost while having a puncture prevention function. SOLUTION: A tread portion 36 of a tire 80 according to the present invention contains an elastic rubber layer 44 and has a thick layer thickness. Therefore, the sharp object does not easily penetrate the tread portion 36, and a puncture of the tire tube 42 can be prevented. Further, the tire 80 according to the present invention is easy to manufacture and can be produced at low cost because the elastic rubber layer 44 is formed only on the tread portion 36. As a result, it is possible to provide a tire for a material handling vehicle having a puncture prevention function and a material handling vehicle equipped with the tire at a low cost. [Selection diagram] Fig. 2

Description

本考案は、手押し運搬車用のタイヤに関するものである。   The present invention relates to a tire for a hand truck.

土木建築資材や土砂等を積載して人力で運搬するネコ車等の手押し運搬車は、工事現場や農林園芸作業、一般家庭等で様々な用途に広く使用されている。そして、この手押し運搬車のタイヤも通常の自転車用のタイヤと同じく内部空間にタイヤチューブを収容し、このタイヤチューブを所定の空気圧で膨らませることで、地面の凹凸による振動を吸収し手押し運搬車の円滑な移動を可能としている。ただし、このタイヤに釘や鋲等の鋭利な尖状物が突き刺さり、タイヤを貫通してタイヤチューブにまで到達すると、タイヤチューブが損傷してエア漏れが生じパンク状態となる。   Wheelbarrows such as cat cars that are loaded with civil engineering materials and earth and sand and are transported by manpower are widely used for various purposes in construction sites, agricultural and horticultural work, general households, and the like. And the tire of this hand truck is housed in an internal space like a normal bicycle tire, and the tire tube is inflated with a predetermined air pressure to absorb vibration caused by unevenness in the ground, thereby pushing the hand truck. Smooth movement is possible. However, if a sharp pointed object such as a nail or a heel sticks into the tire and penetrates the tire to reach the tire tube, the tire tube is damaged and air leaks, resulting in a puncture state.

これに対し下記[特許文献1]には、トレッド部とサイドウォール部に発泡ゴム層を挿入した空気入りタイヤに関する発明が開示されている。この[特許文献1]に記載の発明は、発泡ゴム層を挿入することでタイヤの層厚を厚くし、釘等の尖状物の貫通を阻止してパンク発生の防止を図っている。   On the other hand, the following [Patent Document 1] discloses an invention relating to a pneumatic tire in which a foamed rubber layer is inserted into a tread portion and a sidewall portion. In the invention described in [Patent Document 1], the thickness of a tire is increased by inserting a foamed rubber layer, and penetration of a pointed object such as a nail is prevented to prevent occurrence of puncture.

特許第2895953号公報Japanese Patent No. 2889553

ただし、[特許文献1]に記載の発明では、サイドウォール部にも発泡ゴム層を形成している。しかしながら、手押し運搬車において尖状物の刺さる箇所はタイヤの接地領域であるトレッド部が圧倒的に多く、サイドウォール部は少ない。そして、層厚の薄いサイドウォール部に発泡ゴム層を形成することは層厚の厚いトレッド部に発泡ゴム層を形成するよりも技術的に難しく、製造コストが高いという問題点がある。   However, in the invention described in [Patent Document 1], a foamed rubber layer is also formed on the sidewall portion. However, in the handcart, the tread portion where the pointed object pierces is overwhelmingly the tread portion which is the ground contact region of the tire, and the side wall portion is few. In addition, it is technically more difficult to form a foamed rubber layer in a sidewall portion having a thin layer thickness than in the case where a foamed rubber layer is formed in a tread portion having a thick layer thickness, and there is a problem that the manufacturing cost is high.

本考案は上記事情に鑑みてなされたものであり、パンク防止機能を備えながら、低コストで製造が容易な手押し運搬車用のタイヤを提供することを目的とする。   The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a tire for a handcart that is easy to manufacture at low cost while having a puncture prevention function.

本考案は、
(1)手押し運搬車用のタイヤであって、ホイール20と嵌合するビード部32と、タイヤチューブ42を収容する内部空間と、接地領域であるトレッド部36と、を有し、
前記トレッド部36内に弾性ゴム層44を備えたことを特徴とするタイヤ80を提供することにより、上記課題を解決する。
(2)前記弾性ゴム層44の厚さが4mm〜10mmであり、前記弾性ゴム層44を含むトレッド部36の層厚が8mm〜15mmであることを特徴とする上記(1)記載のタイヤ80を提供することにより、上記課題を解決する。
The present invention
(1) It is a tire for a hand truck, and has a bead portion 32 fitted to the wheel 20, an internal space for housing the tire tube 42, and a tread portion 36 that is a ground contact region,
By providing a tire 80 characterized in that an elastic rubber layer 44 is provided in the tread portion 36, the above-mentioned problems are solved.
(2) The tire 80 according to (1) above, wherein the elastic rubber layer 44 has a thickness of 4 mm to 10 mm, and the tread portion 36 including the elastic rubber layer 44 has a thickness of 8 mm to 15 mm. By providing the above, the above-described problems are solved.

本考案に係るタイヤは、トレッド部にのみ弾性ゴム層を形成するため製造が容易で、パンク防止機能を備えた手押し運搬車用のタイヤを低コストで提供することができる。   The tire according to the present invention is easy to manufacture because the elastic rubber layer is formed only on the tread portion, and a tire for a hand cart with a puncture prevention function can be provided at low cost.

運搬用一輪車を説明する図である。It is a figure explaining the unicycle for conveyance. 本考案に係るタイヤの断面図である。1 is a cross-sectional view of a tire according to the present invention.

本考案に係るタイヤ80の実施の形態を、手押し運搬車である運搬用一輪車100を例に図面に基づいて説明する。先ず、図1に示す運搬用一輪車100は土木建築資材や土砂等を積載して人力で運搬するものであり、フレーム部26と、土砂等を積載する積載部28と、ホイール20を介して設置された本考案に係るタイヤ80と、を有している。また、運搬用一輪車100のフレーム部26は、運搬用一輪車100を停車する際に地面に着地するスタンド部22と、作業者用の持ち手部24と、タイヤ80のホイール20を回転可能に軸支する軸受部30と、を有している。   An embodiment of a tire 80 according to the present invention will be described with reference to the drawings, taking a transporting unicycle 100 which is a hand cart as an example. First, the transporting unicycle 100 shown in FIG. 1 loads civil engineering and building materials, earth and sand, etc. and transports them manually, and is installed via a frame portion 26, a loading portion 28 for loading earth and sand, and a wheel 20. Tire 80 according to the present invention. In addition, the frame portion 26 of the transporting unicycle 100 is configured so that the stand portion 22 that lands on the ground when the transporting unicycle 100 is stopped, the handle portion 24 for the operator, and the wheel 20 of the tire 80 can be rotated. Bearing part 30 to be supported.

次に、本考案に係るタイヤ80の構成を図2の断面図を用いて説明する。本考案に係るタイヤ80は、ホイール20と嵌合するビード部32と、接地領域であり表面にトレッドパターンが形成されたトレッド部36と、ビード部32とトレッド部36とを繋ぐサイドウォール部34と、を備え、断面が略馬蹄形状を呈している。そして、ビード部32とサイドウォール部34とトレッド部36とで囲われたタイヤ80の内部空間には周知のタイヤチューブ42が収容される。このタイヤチューブ42は、図示しないバルブを介して空気が注入されることで所定の空気圧で膨らみ、タイヤ80を内側から保持するとともに、地面からの振動を吸収して運搬用一輪車100のスムーズな移動を可能とする。また、サイドウォール部34、トレッド部36にはタイヤ80を補強する図示しない繊維状のインナーライナーが埋設されており、またビード部32にはホイール20への固定を確実に行うための環状のビードワイヤ32aが埋設されている。   Next, the structure of the tire 80 according to the present invention will be described with reference to the cross-sectional view of FIG. The tire 80 according to the present invention includes a bead portion 32 that fits with the wheel 20, a tread portion 36 that is a grounding region and has a tread pattern formed on the surface, and a sidewall portion 34 that connects the bead portion 32 and the tread portion 36. And the cross section has a substantially horseshoe shape. A well-known tire tube 42 is accommodated in the internal space of the tire 80 surrounded by the bead portion 32, the sidewall portion 34, and the tread portion 36. The tire tube 42 is inflated with a predetermined air pressure by injecting air through a valve (not shown), holds the tire 80 from the inside, and absorbs vibration from the ground to smoothly move the unicycle 100 for transportation. Is possible. Further, a fibrous inner liner (not shown) that reinforces the tire 80 is embedded in the sidewall portion 34 and the tread portion 36, and an annular bead wire for securely fixing the wheel 20 to the bead portion 32. 32a is embedded.

また、本考案に係るタイヤ80はトレッド部36内に弾性ゴム層44を有している。この弾性ゴム層44としては、発泡ゴムを用いることが特に好ましい。弾性ゴム層44に発泡ゴムを用いる場合、先ず、加硫成形前のタイヤ80内の弾性ゴム層44を形成する部位(トレッド部36の内部)に、発泡材を混練したゴム基材を充填する。このときの発泡材としては、ジニトロソ・ベンタメチレン・テトラアミン、アゾジカーボンアミド、アゾボスイソプチロニトル、トルエンスルフォニルヒドラジド等の周知の発泡材を用いることができる。そして、タイヤ80を加硫成形するとともに、この加硫成形時の熱によって発泡材を発泡させ、タイヤ80の加硫成形と弾性ゴム層44の形成とを行う。よって、この構成では、タイヤ80の成形と弾性ゴム層44の形成を同時に一体的に行うことができる。このため、弾性ゴム層44の形成工程を別に設ける必要がなく、タイヤ80をさらに容易かつ低コストで製造することができる。尚、タイヤ80と弾性ゴム層44を同時に成形する場合、インナーライナーを2層とし、弾性ゴム層44の表面側と内面側のそれぞれにインナーライナーを埋設することが強度維持の面から好ましい。   Further, the tire 80 according to the present invention has an elastic rubber layer 44 in the tread portion 36. As the elastic rubber layer 44, it is particularly preferable to use foamed rubber. When foamed rubber is used for the elastic rubber layer 44, first, a rubber base material in which the foamed material is kneaded is filled in a portion (inside the tread portion 36) where the elastic rubber layer 44 is formed in the tire 80 before vulcanization molding. . As the foaming material at this time, well-known foaming materials such as dinitroso / bentamethylene / tetraamine, azodicarbonamide, azobosisoptyronitrile, toluenesulfonylhydrazide and the like can be used. Then, the tire 80 is vulcanized and molded, and the foamed material is foamed by the heat at the time of vulcanization and molding of the tire 80 and the elastic rubber layer 44 are formed. Therefore, in this configuration, the molding of the tire 80 and the formation of the elastic rubber layer 44 can be performed integrally at the same time. For this reason, it is not necessary to provide a separate process for forming the elastic rubber layer 44, and the tire 80 can be manufactured more easily and at low cost. In the case where the tire 80 and the elastic rubber layer 44 are formed at the same time, it is preferable from the viewpoint of maintaining strength that the inner liner has two layers and the inner liner is embedded on each of the surface side and the inner surface side of the elastic rubber layer 44.

尚、弾性ゴム層44は必ずしも発泡ゴムを用いる必要はなく、生ゴム、又は加硫ゴムや、SBS(ポリスチレン−ポリブタジエン−ポリスチレン)やSIS(ポリスチレン−ポリイソプレン−ポリスチレン)等の熱可塑性エラストマの他、周知の弾性ゴムを用いることができる。この場合の弾性ゴム層44の埋設方法は、弾性ゴム層44をタイヤ80とは別に成型してトレッド部36の内側に接着し、その上にゴムシートを接着することで行っても良いし、トレッド部36の内側に接着した弾性ゴム層44上に未加硫のゴムを塗布し、これを加硫することで行っても良い。   The elastic rubber layer 44 does not necessarily need to use foamed rubber. In addition to raw rubber, vulcanized rubber, thermoplastic elastomers such as SBS (polystyrene-polybutadiene-polystyrene) and SIS (polystyrene-polyisoprene-polystyrene), A well-known elastic rubber can be used. The embedding method of the elastic rubber layer 44 in this case may be performed by molding the elastic rubber layer 44 separately from the tire 80 and bonding the elastic rubber layer 44 to the inside of the tread portion 36, and bonding a rubber sheet thereon, Alternatively, unvulcanized rubber may be applied to the elastic rubber layer 44 bonded to the inside of the tread portion 36 and vulcanized.

上記の弾性ゴム層44の厚さは4mm〜10mmが好ましく、この弾性ゴム層44を含むトレッド部36の層厚は8mm〜15mmとすることが好ましい。尚、タイヤ80を貫通する尖状物としては画鋲や廃材から突出した釘やピン等が考えられる。これら尖状物のうち、比較的大きなものは作業者が視認して安全性の観点から除去されている可能性が高い。しかしながら、10mm以下の尖状物は、作業者が見落としてタイヤ80に刺さる可能性が有る。この場合でも、トレッド部36の層厚が8mm〜15mmであれば、これら尖状物の貫通を阻止することができる。これにより、タイヤチューブ42の損傷が回避され、タイヤ80のパンクを防止することができる。   The thickness of the elastic rubber layer 44 is preferably 4 mm to 10 mm, and the layer thickness of the tread portion 36 including the elastic rubber layer 44 is preferably 8 mm to 15 mm. In addition, as a pointed object which penetrates the tire 80, a nail, a pin, or the like protruding from a thumbtack or waste material can be considered. Among these pointed objects, a relatively large one is likely to be visually recognized by an operator and removed from the viewpoint of safety. However, a pointed object of 10 mm or less may be overlooked by the operator and stuck in the tire 80. Even in this case, if the layer thickness of the tread portion 36 is 8 mm to 15 mm, penetration of these pointed objects can be prevented. Thereby, damage to the tire tube 42 is avoided, and puncture of the tire 80 can be prevented.

次に、本考案に係るタイヤ80を備えた運搬用一輪車100の使用方法を説明する。先ず、作業者が運搬用一輪車100の持ち手部24を持って、運搬用一輪車100を移動する。次に、運搬用一輪車100を停めてスタンド部22を接地し、運搬用一輪車100が転倒しないよう保持する。次に、作業者が積載部28に土木建築資材や土砂等を積載する。次に、作業者は再度持ち手部24を持って運搬用一輪車100を目的の位置に移動する。これにより、積載物は運搬される。この際、運搬用一輪車100のタイヤ80のトレッド部36が地面の尖状物を轢き、尖状物がトレッド部36に刺さったとしても、本考案のタイヤ80のトレッド部36は弾性ゴム層44を内在し層厚が厚いため、尖状物が容易に貫通せずタイヤチューブ42が損傷する可能性も低い。これにより、タイヤ80のパンクを回避することができる。   Next, a method of using the transporting unicycle 100 including the tire 80 according to the present invention will be described. First, the operator holds the handle portion 24 of the transporting unicycle 100 and moves the transporting unicycle 100. Next, the transporting unicycle 100 is stopped and the stand unit 22 is grounded to hold the transporting unicycle 100 so as not to fall down. Next, an operator loads civil engineering materials, earth and sand, etc. on the loading unit 28. Next, the operator again holds the handle portion 24 and moves the transporting unicycle 100 to a target position. Thereby, the load is transported. At this time, even if the tread portion 36 of the tire 80 of the transporting unicycle 100 pierces the pointed object on the ground and the pointed object pierces the tread portion 36, the tread portion 36 of the tire 80 of the present invention has the elastic rubber layer 44. Therefore, the pointed object does not easily penetrate and the tire tube 42 is less likely to be damaged. Thereby, puncture of the tire 80 can be avoided.

以上のように、本考案に係るタイヤ80のトレッド部36は弾性ゴム層44を内在しており層厚が厚い。このため、尖状物がトレッド部36を容易に貫通せず、タイヤチューブ42のパンクを防止することができる。また、本考案に係るタイヤ80は、トレッド部36のみに弾性ゴム層44を形成するため製造が容易で低コストでの生産が可能である。これにより、パンク防止機能を備えた手押し運搬車用のタイヤ80及び、これを備えた手押し運搬車を安価で提供することができる。   As described above, the tread portion 36 of the tire 80 according to the present invention includes the elastic rubber layer 44 and is thick. For this reason, the pointed object does not easily penetrate the tread portion 36, and the tire tube 42 can be prevented from being punctured. In addition, the tire 80 according to the present invention forms the elastic rubber layer 44 only on the tread portion 36, and thus can be easily manufactured and can be produced at low cost. Thereby, the tire 80 for handcarts provided with the puncture prevention function and the handcart provided with this can be provided at low cost.

尚、上記に示したタイヤ80及び手押し運搬車(運搬用一輪車100)の各部の形状、寸法、デザイン等は一例であるから、上記の例に限定されるわけでは無く、本考案は本考案の要旨を逸脱しない範囲で変更して実施することが可能である。   In addition, since the shape, dimension, design, etc. of each part of the tire 80 and the hand cart (the transport unicycle 100) described above are examples, the present invention is not limited to the above examples. Modifications can be made without departing from the scope of the invention.

20 ホイール
32 ビード部
36 トレッド部
42 タイヤチューブ
44 弾性ゴム層
80 タイヤ
100 運搬用一輪車(手押し運搬車)
20 wheels
32 Beads
36 tread
42 Tire tube
44 Elastic rubber layer
80 tires
100 unicycle for transportation (handcart)

Claims (2)

手押し運搬車用のタイヤであって、
ホイールと嵌合するビード部と、タイヤチューブを収容する内部空間と、接地領域であるトレッド部と、を有し、
前記トレッド部内に弾性ゴム層を備えたことを特徴とするタイヤ。
Tires for handcarts,
A bead portion that fits into the wheel, an internal space that accommodates the tire tube, and a tread portion that is a ground contact region,
A tire comprising an elastic rubber layer in the tread portion.
前記弾性ゴム層の厚さが4mm〜10mmであり、前記弾性ゴム層を含むトレッド部の層厚が8mm〜15mmであることを特徴とする請求項1記載のタイヤ。 The tire according to claim 1, wherein the elastic rubber layer has a thickness of 4 mm to 10 mm, and a tread portion including the elastic rubber layer has a thickness of 8 mm to 15 mm.
JP2014002247U 2014-04-30 2014-04-30 tire Expired - Lifetime JP3191812U (en)

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