JP4286812B2 - Wheelbarrow - Google Patents

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JP4286812B2
JP4286812B2 JP2005198363A JP2005198363A JP4286812B2 JP 4286812 B2 JP4286812 B2 JP 4286812B2 JP 2005198363 A JP2005198363 A JP 2005198363A JP 2005198363 A JP2005198363 A JP 2005198363A JP 4286812 B2 JP4286812 B2 JP 4286812B2
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wheel
handcart
auxiliary wheel
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contact
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JP2007014519A (en
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潔 宮城
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象印ベビー株式会社
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Description

本発明は手押車に関し、より詳しくは段差を乗り越えていくことが可能な手押車に関する。   The present invention relates to a handcart, and more particularly to a handcart capable of overcoming a step.

足腰が衰えている人などが歩行補助や手荷物の運搬などに手押車を用いることがある。使用者はこの手押車を押進しながら歩行するものである。   A person with weak legs may use a handcart to assist walking or to carry baggage. The user walks while pushing the handcart.

ところが手押車を押進しながら歩道等を歩いていると段差に出くわすことが多々ある。ことに手押車は一般に車輪の径が小さいことから2cm程度の段差でも越えることは難しく、押進者がハンドル等の押し手を手前に引き前輪を持ち上げ段差を越える必要がある。   However, when you walk on a sidewalk while pushing a handcart, you often come across a step. In particular, since a wheelbarrow is generally small in wheel diameter, it is difficult to cross even a step of about 2 cm, and it is necessary for the pusher to pull a pusher such as a handle toward the front to lift the front wheel and cross the step.

この際手押車は軽量のものが多くバランスを崩しがちである。又ブレーキを掛けたままでは前進できないことから、つまり段差を越えられないことから、ブレーキを掛けずに前輪を持ち上げ段差を越えることになり、前輪を持ち上げるために余計な力が加わっていること相俟って予想外に手押車が前進してしまい、手押車しいては押進者までが転倒する恐れがある。   At this time, many handcarts are lightweight and tend to lose balance. In addition, since the vehicle cannot move forward with the brakes applied, that is, the step cannot be exceeded, the front wheel is lifted and over the step without applying the brake, and an extra force is applied to lift the front wheel. As a result, the handcart moves forward unexpectedly, and there is a risk that even the pusher will fall if the handcart is pushed.

そこでこのような危険性を回避すべく、段差を乗り越えることが可能な手押車が種々提案されている。   In order to avoid such a risk, various handcarts that can overcome a step have been proposed.

係る手押車に関する発明が記載された特許文献として、例えば特開2000−85583号公報や特開2004−344637号公報がある。ここに特開2000−85583号公報記載の発明は後輪の後方にステップを設け、当該ステップを踏むことで前輪を持ち上げ段差を越えるものである。又特開2004−344637号公報記載の発明は既存の車椅子に装着可能な装置であり前輪を持ち上げることで段差を越えるものである。
特開2000−85583号公報 特開2004−344637号公報
As patent documents in which an invention related to such a handcart is described, there are, for example, Japanese Patent Application Laid-Open Nos. 2000-85583 and 2004-344637. The invention described in Japanese Patent Application Laid-Open No. 2000-85583 is provided with a step behind the rear wheel, and the front wheel is lifted and stepped over the step by stepping on the step. The invention described in Japanese Patent Application Laid-Open No. 2004-344637 is a device that can be mounted on an existing wheelchair, and is designed to exceed a step by lifting the front wheel.
JP 2000-85583 A JP 2004-344637 A

本発明は上述の手押車を押進しながら段差を越える際の問題点を解消することを目的とするものであり、つまりは段差を容易に乗り越えることが可能な手押車を提供することを目的とするものである。   An object of the present invention is to solve the problem of overcoming a step while pushing the handcart, that is, to provide a handcart that can easily get over the step. It is what.

上記課題を解決するために請求項1記載の発明は以下のように構成した。   In order to solve the above problems, the invention according to claim 1 is configured as follows.

下端に前輪を回転自在に設けた前脚杆、下端に後輪を回転自在に設けた後脚杆Front leg rod with a front wheel rotatably at the lower end, Rear leg rod with a rear wheel rotatably at the lower end 及び押し手、少なくとも以上の三つの部材を有する手押車において、後脚杆の下And a pusher, a handcart having at least three members, 部に後輪と並行して後輪よりも径の小さな補助輪を、回転軸が後輪の回転軸よりAuxiliary wheels with a smaller diameter than the rear wheels in parallel with the rear wheels. も進行方向の反対側にくる形態で設ける。 Is also provided on the opposite side of the traveling direction.

補助輪に、当たりを有する凹溝を周状に設けると共に、後脚杆から貫通されるIn the auxiliary wheel, a concave groove having a contact is provided in a circumferential shape and penetrated from the rear leg collar. ストッパーピンを凹溝に緩挿させ、当たりとストッパーピンの当接により補助輪Loosely insert the stopper pin into the groove, and contact the stopper pin with the auxiliary wheel. の回転を1回転未満に制御すると共に後脚杆と補助輪にわたり巻きバネを介装さThe rotation of the wing is controlled to less than one rotation and a winding spring is interposed between the rear leg collar and the auxiliary wheel せる。Make it.

以下、上述のように構成される本発明が如何にして課題を解決する作用を有するかを図面を参照しながら述べる。   Hereinafter, it will be described with reference to the drawings how the present invention configured as described above has an effect of solving the problems.

図1は本発明に係る手押車を進行方向反対側から見た斜視図であり、図2は同じく進行方向側から見た斜視図であり、図3は補助輪の取り付け方の一例を示す説明図であり、図4は補助輪の正面図であり、図5は補助輪を後脚杆に取り付けた状態の断面図であり、図6及び図7は本発明に係る手押車が段差を乗り越えていく状態を示す説明図である。  FIG. 1 is a perspective view of a handcart according to the present invention viewed from the opposite side in the traveling direction, FIG. 2 is a perspective view similarly viewed from the traveling direction side, and FIG. FIG. 4 is a front view of the auxiliary wheel, FIG. 5 is a cross-sectional view of the auxiliary wheel attached to the rear leg cage, and FIGS. 6 and 7 illustrate the handcart according to the present invention overcoming the step. It is explanatory drawing which shows the state which goes.

本発明に係る手押車は図6に示すように段差Aに衝突すると押進者(不図示)が押し手3を手前に(自身の側)にすなわち進行方向反対側(図中右側)に引き、図7に示すように前輪1aを持ち上げる。この際多くの場合押進者は反射的にブレーキを掛ける。そして本発明に係る手押車では、押し手3を手前に引くと補助輪10が接地し前輪1aのみならず後輪2aも若干持ち上がることから、補助輪10の回転に伴い手押車が前進し段差Aを越えることが可能となるのである。この際補助輪10により支持されることで、押し手3を過度に手前に引き寄せることを防止できるのである。つまり手押車がバランスを失することを防止できるのである。When the handcart according to the present invention collides with the step A as shown in FIG. 6, the pusher (not shown) pulls the pusher 3 forward (to his own side), that is, to the side opposite to the traveling direction (right side in the figure). The front wheel 1a is lifted as shown in FIG. In this case, the pusher often applies the brake reflexively. In the handcart according to the present invention, when the pusher 3 is pulled forward, the auxiliary wheel 10 is grounded, and not only the front wheel 1a but also the rear wheel 2a is slightly lifted. It is possible to exceed A. At this time, by being supported by the auxiliary wheel 10, it is possible to prevent the pusher 3 from being excessively pulled forward. That is, the handcart can be prevented from losing balance.

又、本発明に係る手押車は補助輪の回転が1回転未満に制御されていることから、押し手3を手前に引いて補助輪の回転により手押車が前進する際に、補助輪の1回転未満の距離しか進まないことになる。かように手押車が過度に前進することが無くなることから、手押車しいては押進者が転倒することを防止できるのである。 Further, since the rotation of the auxiliary wheel is controlled to be less than one rotation in the handcart according to the present invention, when the handcart is advanced by the rotation of the auxiliary wheel by pulling the pusher 3 toward the front, It will only travel a distance less than the rotation. Thus, since the handcart does not advance excessively, the pusher can be prevented from falling over when the handcart is used.

かようにして本発明によれば、段差を容易に乗り越えることが可能な、更にいえば前輪を高く持ち上げさえすれば、車輪の直径を超えるような高い段差であって容易に乗り越えることが可能な手押車を提供することが可能となるのである。   Thus, according to the present invention, it is possible to easily get over the step, and moreover, it is possible to easily get over with a high step that exceeds the wheel diameter as long as the front wheel is lifted high. It is possible to provide a handcart.

一、 本発明に係る手押車は図1、図2に示すように、下端に前輪1aを回転自在に設けた一対の前脚杆1、下端に後輪2aを回転自在に設けた一対の後脚杆2及び押し手3を有するものである。そして上述の前脚杆1、後脚杆2及び押し手3は連結部材5を介して相互に連結されるものである。   1. As shown in FIGS. 1 and 2, the handcart according to the present invention includes a pair of front leg rods 1 having a front wheel 1a rotatably provided at the lower end and a pair of rear legs having a rear wheel 2a rotatably provided at the lower end. It has a scissors 2 and a pusher 3. The front leg rod 1, the rear leg rod 2 and the pusher 3 described above are connected to each other via a connecting member 5.

又、押し手3は図1、図2に示すように略コ字状の杆部材で形成してある。押し手3の上辺3a、すなわち押進者が手で握る部分近傍には上辺3aと平行にブレーキ操作棒4aが設けてある。このブレーキ操作棒4aを握るとワイヤー4bが引き張られ、一対の後脚杆2,2にわたり揺動自在に設けられているブレーキ杆4cを揺動させる構造となっている。ブレーキ杆4cの端部には揺動に伴い後輪1bに接しあるいは離れる位置に設けられた接触部4dが設けられている。接触部4dが後輪2aに接触することで後輪2aの回転が制御されブレーキが掛かるのである。 The pusher 3 is formed of a substantially U-shaped eaves member as shown in FIGS. A brake operation bar 4a is provided in parallel with the upper side 3a in the vicinity of the upper side 3a of the pusher 3, that is, in the vicinity of the portion gripped by the pusher. When the brake operation rod 4a is grasped, the wire 4b is pulled, and the brake rod 4c provided so as to be swingable across the pair of rear leg rods 2 and 2 is configured to swing. A contact portion 4d is provided at the end of the brake rod 4c so as to come into contact with or leave the rear wheel 1b as it swings. When the contact portion 4d contacts the rear wheel 2a, the rotation of the rear wheel 2a is controlled and the brake is applied.

二、 請求項1記載の手押車
請求項1記載の手押車は、後脚杆2の下部に後輪2aと並行して後輪2aよりも径の小さな補助輪10を、回転軸10aが後輪2の回転軸2bよりも進行方向の反対側にくる形態で設けてある。ここに並行とは後輪2aの進行方向と補助輪10の進行方向が一致するという意味である。
2. The handcart described in claim 1 is the handcart described in claim 1, in which the auxiliary wheel 10 having a smaller diameter than the rear wheel 2a is disposed in parallel with the rear wheel 2a at the lower portion of the rear leg rod 2, and the rotating shaft 10a is disposed at the rear. It is provided in a form that comes to the opposite side of the traveling direction from the rotating shaft 2 b of the wheel 2. Here, the parallel means that the traveling direction of the rear wheel 2a and the traveling direction of the auxiliary wheel 10 coincide.

又、補助輪10は、補助輪10が接地している状態では前輪1a、あるいは前輪1a及び後輪2aを接地しない形態に持ち上げることが可能な位置に設けてある。   In addition, the auxiliary wheel 10 is provided at a position where the front wheel 1a or the front wheel 1a and the rear wheel 2a can be lifted up so as not to ground when the auxiliary wheel 10 is grounded.

補助輪10の後脚杆2への取り付け方としては図1に示すように湾曲した形状の一対の板材10bで後脚杆2及び補助輪10を挟み、板材10b、10b間にわたり回転軸10aを貫通させるといった取り付け方でもよいし、図3に示すように後脚杆の下端付近を湾曲させ、後脚杆2に補助輪10の回転軸10aを貫通させるといった形態の取り付け方でも構わない。 As shown in FIG. 1, the auxiliary wheel 10 is attached to the rear leg rod 2 by sandwiching the rear leg rod 2 and the auxiliary wheel 10 with a pair of curved plate members 10b, and the rotating shaft 10a is interposed between the plate members 10b and 10b. may be a attaching such to penetrate, is curved around the lower end of Koashi3, it may be a mounting method of the embodiment such as passing the rotational shaft 10a of the auxiliary wheel 10 to Koashi2.

三、 請求項1記載の手押車3. The handcart according to claim 1
請求項1記載の手押車は補助輪20の回転を1回転未満に制御すると共に、回転後に元の状態に復元するための弾性体を介装させてある。かように構成される補助輪20の正面図を示すのが図4であり、補助輪20を後脚杆2に取り付けた状態の断面を示すのが図5である。  The handcart described in claim 1 controls the rotation of the auxiliary wheel 20 to less than one rotation and is provided with an elastic body for restoring the original state after the rotation. FIG. 4 shows a front view of the auxiliary wheel 20 configured as described above, and FIG. 5 shows a cross section in a state where the auxiliary wheel 20 is attached to the rear leg 2.

補助輪20は後脚杆2と併せて貫通される回転軸20aを中心として、回転自在に設けてある。又外周には合成ゴム部27が取り付けてある。   The auxiliary wheel 20 is provided so as to be rotatable about a rotating shaft 20a that is penetrated together with the rear leg rod 2. A synthetic rubber portion 27 is attached to the outer periphery.

補助輪20には凹溝22が周状に設けてあり、この凹溝22に後脚杆2から貫通されるストッパーピン21が緩挿される仕組みになっている。そして凹溝22内には当たり25が設けてあり、この当たり25とストッパーピン21が当接することで補助輪20の回転が1回転未満に制御されるのである。すなわち図4に示すようにストッパーピン21と当たり25が接する状態から補助輪20が回転軸20aを中心に反時計回りに回転すると、ほぼ1回転した段階で当たり25がストッパーピン21に当接し、それ以上回転することが阻止される。かようにして請求項1記載の発明においては、補助輪20の回転を1回転未満に制御するのである。 A concave groove 22 is provided in the auxiliary wheel 20 in a circumferential shape, and a stopper pin 21 that penetrates from the rear leg rod 2 is loosely inserted into the concave groove 22. A contact 25 is provided in the recessed groove 22, and the rotation of the auxiliary wheel 20 is controlled to be less than 1 rotation by the contact of the contact 25 with the stopper pin 21. That is, as shown in FIG. 4, when the auxiliary wheel 20 rotates counterclockwise around the rotation shaft 20a from the state where the stopper pin 21 and the contact 25 are in contact with each other, the contact 25 comes into contact with the stopper pin 21 at a stage of approximately one rotation, Further rotation is prevented. Thus, in the first aspect of the invention, the rotation of the auxiliary wheel 20 is controlled to be less than one rotation.

又補助輪20には弾性体たる巻きバネ23を介装させるための凹部24が設けてある。図5に示すように凹部24内に巻きバネ23を収納し、巻きバネ23の一方端を後脚杆2に設けた孔2cに差し込み他方端を補助輪20に設けた孔26に差し込むことで巻きバネ20を介装させるのである。かように構成することで補助輪20の回転により、元の状態に戻ろうとする復元力が巻きバネ23により生じ、段差を越えた段階すなわち前輪1及び後輪2が接地し補助輪20の接地状態が解放された段階で補助輪20が回転し、元の状態すなわち図4に示すようなストッパーピン21の進行方向側(図中左側)に当たり25が当接した状態に戻るのである。これにより補助輪20は1回転未満しか回転できない状態に復元されるものである。 The auxiliary wheel 20 is provided with a recess 24 for interposing a winding spring 23 as an elastic body. As shown in FIG. 5 , the winding spring 23 is accommodated in the recess 24, one end of the winding spring 23 is inserted into the hole 2 c provided in the rear leg rod 2, and the other end is inserted into the hole 26 provided in the auxiliary wheel 20. The winding spring 20 is interposed. With such a configuration, the restoring force to return to the original state is generated by the winding spring 23 due to the rotation of the auxiliary wheel 20, and the stage beyond the step, that is, the front wheel 1 and the rear wheel 2 are grounded and the auxiliary wheel 20 is grounded. state rotates the auxiliary wheels 20 are released out, it is to return to a state where contact 25 is in contact with the traveling direction of the stopper pin 21 as shown in the original state i.e. 4 (left side in the figure). As a result, the auxiliary wheel 20 is restored to a state in which it can rotate only less than one rotation.

本発明に係る手押車を進行方向反対側から見た斜視図。The perspective view which looked at the handcart which concerns on this invention from the advancing direction opposite side. 同じく進行方向側から見た斜視図。The perspective view similarly seen from the advancing direction side. 補助輪の取り付け方の一例を示す説明図。Explanatory drawing which shows an example of how to attach an auxiliary wheel. 請求項2記載の発明における補助輪の正面図。The front view of the auxiliary wheel in invention of Claim 2. 補助輪を後脚杆に取り付けた状態の断面図。Sectional drawing of the state which attached the auxiliary wheel to the rear leg rod. 本発明に係る手押車が段差を乗り越えていく状態を示す説明図。Explanatory drawing which shows the state in which the handcart which concerns on this invention gets over a level | step difference. 本発明に係る手押車が段差を乗り越えていく状態を示す説明図。Explanatory drawing which shows the state in which the handcart which concerns on this invention gets over a level | step difference.

符号の説明Explanation of symbols

1・・前脚杆 1a・・前輪1. Front heel 1a Front wheel
2・・後脚杆 2a・・後輪2. Rear foot rod 2a ... Rear wheel
3・・押し手 10、20・・補助輪3 .... Pusher 10, 20, ... Auxiliary wheel

Claims (1)

下端に前輪を回転自在に設けた前脚杆、下端に後輪を回転自在に設けた後脚杆及び押し手、少なくとも以上の三つの部材を有する手押車において、
後脚杆2の下部に後輪2aと並行して後輪2aよりも径の小さな補助輪20を、回転軸20aが後輪2aの回転軸よりも進行方向の反対側にくる形態で設けたこと、
補助輪20に、当たり25を有する凹溝22を周状に設けると共に、後脚杆2から貫通されるストッパーピン21を凹溝22に緩挿させ、当たり25とストッパーピン21の当接により補助輪20の回転を1回転未満に制御すると共に後脚杆2と補助輪20にわたり巻きバネ23を介装させたこと、
を特徴とする手押車。
In a handcart having a front leg rod provided with a front wheel rotatably at the lower end, a rear leg kite and a pusher provided with a rear wheel rotatably at a lower end, and at least three members.
An auxiliary wheel 20 having a diameter smaller than that of the rear wheel 2a is provided at the lower part of the rear leg 2 in such a manner that the rotating shaft 20a is located on the opposite side of the traveling direction from the rotating shaft of the rear wheel 2a. thing,
The auxiliary wheel 20 is provided with a concave groove 22 having a contact 25 in a circumferential shape, and a stopper pin 21 penetrating from the rear leg collar 2 is loosely inserted into the concave groove 22 to assist the contact 25 with the contact of the stopper pin 21. The rotation of the wheel 20 is controlled to be less than one rotation and the winding spring 23 is interposed between the rear leg rod 2 and the auxiliary wheel 20;
A handcart characterized by
JP2005198363A 2005-07-07 2005-07-07 Wheelbarrow Active JP4286812B2 (en)

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JP2005198363A JP4286812B2 (en) 2005-07-07 2005-07-07 Wheelbarrow

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JP4286812B2 true JP4286812B2 (en) 2009-07-01

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JP5916932B1 (en) * 2015-09-08 2016-05-11 株式会社ウェルパートナーズ Walking assistance vehicle
CN108163023A (en) * 2018-01-04 2018-06-15 太原科技大学 A kind of balance shock cart for being used to transport inflammable and explosive object

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