JP4783515B2 - Caster with stopper means - Google Patents
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- JP4783515B2 JP4783515B2 JP2001121511A JP2001121511A JP4783515B2 JP 4783515 B2 JP4783515 B2 JP 4783515B2 JP 2001121511 A JP2001121511 A JP 2001121511A JP 2001121511 A JP2001121511 A JP 2001121511A JP 4783515 B2 JP4783515 B2 JP 4783515B2
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Description
【0001】
【発明の属する技術分野】
本発明は、ストッパ手段付きキャスタ、さらに詳しくは、車輪の接地面(外周面)近くの側面に特定の部材を押し付け可能とすることによって車輪の回転を止めるようにしたストッパ手段付きキャスタに関するものである。
【0002】
【従来の技術】
従来より、台車、カート、機器・装置、コンテナボックス、ベッド、机、椅子、ラック、ワゴンをはじめとする種々の可搬物の接地部分には、移動を容易にするためにキャスタが取り付けられている。
【0003】
キャスタは、一般的に、取付台盤、下部台盤、支持ヨーク、軸、車輪などの部材で構成される。この場合、キャスタを前進させるときに車輪が自然に前進方向に向くように、支持ヨークのキャスタ前進側(前面側)は側面視で斜辺に、後方側(後面側)は側面視でほぼ垂直線となるように形成して、支持ヨークの下端側に軸支する軸を、取付台盤および下部台盤の中心線よりも後方に位置させるのが通常である。
【0004】
キャスタには、用途にもよるが、走行移動時以外は車輪が回転しないようにロックないしストッパ機構を設けることが多い。このようなロックないしストッパ機構としては、(イ)車輪の回転を止めるもの、(ロ)支持ヨークの旋回を止めるもの、(ハ)支持ヨークの旋回と車輪の回転との双方を止めるもの、がある。車輪の回転を止めるときには、車輪の接地面となる外周面に制動部材を当接させることが多い。
【0005】
いくつかを例示すると、たとえば、特開平11−321208号公報には、車輪の回転および支持ヨークの旋回を同時に制御するだけでなく、支持ヨークの旋回のみを止めて直線走行のみを可能とする機構を備えたブレーキ装置付きキャスタが示されている。
【0006】
特開平9−76704号公報には、ヨークの向きに関係なく制動操作レバーの位置が一定となるようにして、制動操作レバーの操作を容易に行うことができるようにしたロック機構付きキャスタが示されている。
【0007】
特開平6−16002号公報には、フレームの旋回および車輪の回転を同時に制動することのできるキャスタの制動機構が示されている。
【0008】
実公平8−5842号公報には、車輪の回転およびキャスタの回転を同時にロックし、またはキャスタの回転のみを選択的にロックすることができるブレーキ装置付きキャスタが示されている。
【0009】
【発明が解決しようとする課題】
しかしながら、従来のロックないしストッパ機構を備えたキャスタは、一般に部品点数が多い上、構造が複雑となることが多く、コスト高の原因や故障の原因となっている。また、制動機構を付加するために、キャスタそのものを大幅に変更しなければならず、既存のキャスタを利用しがたいという問題点も有している。
【0010】
本発明は、このような背景下において、車輪の接地面(外周面)近くの側面に特定の制動部材をワンタッチで押し付ける方式を採用することにより、車輪の回転を確実に止めることができ、制動解除も容易で、全体はシンプルであり、しかも既存のキャスタに若干の工夫を講じるだけで作製することができるストッパ手段付きキャスタを提供することを目的とするものである。
【0011】
【課題を解決するための手段】
本発明のストッパ手段付きキャスタは、取付台盤(1)と、下部台盤(2)と、それらの台盤(1),(2)に対し回転自在に設けられた支持ヨーク(3)と、その支持ヨーク(3)の分岐片(31),(31)の下端側間に軸支した軸(4)と、その軸(4)に装着した車輪(5)とで構成されたキャスタにおいて、
足踏み部(61a)と2片の脚部(61b),(61b)とからなる門形アーム部(61)と、それぞれの脚部(61b)の基端側から該脚部(61b)との間でL字形が形成されるように延設された2片の延設片(62),(62)とからなるペダル型操作部材(6)を、支持ヨーク(3)の両分岐片(31),(31)を挟むように、かつその門形アーム部(61)の足踏み部(61a)側が支持ヨーク(3)の前面側に位置するように、軸(4)に軸支すること、
前記ペダル型操作部材(6)の延設片(62),(62)の内側の面は、足踏み部(61a)を踏み込んでペダル型操作部材(6)を軸(4)周りに回動させたときに、支持ヨーク(3)の分岐片(31),(31)の外面との間隔が狭くなるようなテーパー面に形成してあること、
前記支持ヨーク(3)の分岐片(31),(31)の後面側の分岐基部側の位置に貫通孔(h),(h)を設けると共に、その貫通孔(h),(h)を通して、リベット(7),(7)を車輪(5)の接地面近くの側面方向に向けてスライド可能に挿通設置すること、
もって、足踏み部(61a)を踏み込んで延設片(62),(62)を回動させたときに、その延設片(62),(62)のテーパー面により前記リベット(7),(7)の頭部に押圧力が加わって、該リベット(7),(7)が車輪(5)の接地面近くの側面の方向にスライド移動した後、該リベット(7),(7)の頭部とは反対側の端部が車輪(5)の接地面近くの側面に当接して車輪(5)がロックされるようにしてあること、
を特徴とするものである。
【0012】
【発明の実施の形態】
以下本発明を詳細に説明する。
【0013】
〈キャスタの基本構成〉
キャスタは、従来のキャスタと同様に、取付台盤(1)と、下部台盤(2)と、それらの台盤(1),(2)に対し回転自在に設けられた支持ヨーク(3)と、その支持ヨーク(3)の分岐片(31),(31)の下端側間に軸支した軸(4)と、その軸(4)に装着した車輪(5)とで構成される。
【0014】
本発明のキャスタは、従来のキャスタと基本の構成が変わらないので、既存のキャスタを利用できるのである。
【0015】
〈改良点〉
本発明においては、以下に述べるように、上記従来のキャスタの基本構成に、ベダル型操作部材(6)およびリベット(7),(7)を取り付けるという2つの工夫を講じる。
【0016】
〈ペダル型操作部材(6)〉
ペダル型操作部材(6)は、足踏み部(61a)と2片の脚部(61b),(61b)とからなる門形アーム部(61)と、それぞれの脚部(61b)の基端側から該脚部(61b)との間でL字形が形成されるように延設された2片の延設片(62),(62)とからなる。
【0017】
そしてこのペダル型操作部材(6)を、支持ヨーク(3)の両分岐片(31),(31)を挟むように、かつその門形アーム部(61)の足踏み部(61a)側が支持ヨーク(3)の前面側に位置するように、軸(4)に軸支する。そのため、軸(4)は従来のキャスタのそれよりも若干長いものを用いることになる。
【0018】
支持ヨーク(3)の前面側とは、キャスタ前進側の面を言うものとし、通常は側面視で斜辺(またはカーブした斜辺)に形成されている。一方、支持ヨーク(3)の後面側とは、キャスタ前進側とは反対の後方側を言い、通常は側面視で概ね垂直線となるように形成されている。
【0019】
上記ペダル型操作部材(6)の延設片(62),(62)の内側の面は、足踏み部(61a)を踏み込んでペダル型操作部材(6)を軸(4)周りに回動させたときに、支持ヨーク(3)の分岐片(31),(31)の外面との間隔が狭くなるようなテーパー面に形成する。テーパー面の角度は、9〜12°程度とすることが好ましい。なおテーパー面とする部分は、延設片(62),(62)の遊端側の部分だけで足りる。
【0020】
〈リベット(7),(7)〉
上記の支持ヨーク(3)の分岐片(31),(31)の後面側の分岐基部側の位置には、貫通孔(h),(h)を設けると共に、その貫通孔(h),(h)を通して、リベット(7),(7)を車輪(5)の接地面近くの側面方向に向けてスライド可能に挿通設置する。
【0021】
リベット(7)の頭部は、ペダル型操作部材(6)の延設片(62),(62)の内側のテーパー面との接触によりリベット(7)が円滑にスライドするように、半球頭状に形成することが望ましい。
【0022】
〈ペダル型操作部材(6)とリベット(7),(7)との協同作用〉
ペダル型操作部材(6)とリベット(7),(7)とを上述のように構成したため、足踏み部(61a)を踏み込んで延設片(62),(62)を回動させると、その延設片(62),(62)のテーパー面によりリベット(7),(7)の頭部に押圧力が加わって、該リベット(7),(7)が車輪(5)の接地面近くの側面方向にスライド移動する。
【0023】
その結果、リベット(7),(7)の頭部とは反対側の端部が車輪(5)の接地面(外周面)近くの側面に接当し、車輪(5)がロックされる。
【0024】
ロックの解除は、ペダル型操作部材(6)の足踏み部(61a)を持ち上げればよい。これにより、リベット(7),(7)が車輪(5)からわずかに離れるので、もはや車輪(5)の回転の支障にはならない。この持ち上げ操作は、足の爪先で行うことができ、場合により手で行ってもよい。
【0025】
【実施例】
次に実施例をあげて本発明をさらに説明する。
【0026】
実施例1
図1は本発明のストッパ手段付きキャスタの一例を示した側面図である。
図2は図1のキャスタの背面図である。
図3は図1のキャスタの底面図である。
図4は図1のキャスタの平面図である。
【0027】
図5は図1のストッパ手段付きキャスタの取付台盤(1)、下部台盤(2)、支持ヨーク(3)の部分の縦断面図である。
図6は支持ヨーク(3)の縦断面図である。
【0028】
図7は図1のキャスタのペダル型操作部材(6)の側面図である。
図8は図7のペダル型操作部材(6)の平面図である。
図9は図7のペダル型操作部材(6)の底面図である。
【0029】
図10は本発明の操作および作用を示した説明図である。
【0030】
〈キャスタの基本構成〉
図1〜6において、取付台盤(1)は、支持ヨーク(3)を介在させた状態で、下部台盤(2)との間で、ボルト(8)、ナット(9)およびワッシャ(10)により締結固定してある。
【0031】
支持ヨーク(3)は、その上部が取付台盤(1)と下部台盤(2)とで挟まれた状態で、ベアリング(11)により回転自在となっている。
【0032】
支持ヨーク(3)の下部側は2股に別れ、その別れた片が分岐片(31),(31)を構成している。この実施例では、支持ヨーク(3)はちょうど竹を斜めに切断したようになっており、その前面側は側面視で斜辺に形成してある。支持ヨーク(3)の後面側は、後方から見た場合に門形となるように形成してあり、その後面は側面視でほぼ垂直線となるようにしてある。
【0033】
支持ヨーク(3)の分岐片(31),(31)の下端側間には、軸(4)が軸支してある。そしてその軸(4)には、車輪(5)が装着してある。
【0034】
上記各部材のうち、取付台盤(1)、下部台盤(2)、支持ヨーク(3)は、通常、ABS樹脂、ポリアミド系樹脂をはじめとするプラスチックスの射出成形品(大型の場合は繊維補強プラスチックスやウイスカー補強プラスチックスとすることもある)で構成されるが、金属製とすることもある。
【0035】
〈ペダル型操作部材(6) 〉
図1〜3および図7〜9に示したように、ペダル型操作部材(6)は、門形アーム部(61)と2片の延設片(62),(62)との一体成形物からなる。
【0036】
このうち門形アーム部(61)は、足踏み部(61a)と2片の脚部(61b),(61b)とからなる。延設片(62),(62)は、それぞれの脚部(61b)の基端側から該脚部(61b)との間でL字形が形成されるように延設される。脚部(61b)−延設片(62)のなす角度は、この実施例ではほぼ90°としてある。
【0037】
このペダル型操作部材(6)は、支持ヨーク(3)の両分岐片(31),(31)を挟むように、かつその門形アーム部(61)の足踏み部(61a)側が支持ヨーク(3)の前面側に位置するように、軸(4)に軸支してある。
【0038】
このようにペダル型操作部材(6)を、軸(4)の部分に軸支するため、キャスタとして従来市販されている標準品を用いる場合には、軸(4)は従来のキャスタのそれよりも若干長いものを用いることになる。
【0039】
上記ペダル型操作部材(6)の延設片(62)、(62)の遊端側の内側の面は、足踏み部(61a)を踏み込んでペダル型操作部材(6)を軸(4)周りに回動させたときに、支持ヨーク(3)の分岐片(31),(31)の外面との間隔が狭くなるようなテーパー面に形成してある(図8参照)。テーパー面の角度θは、この実施例では11°にしてある。
【0040】
〈リベット(7),(7)〉
上記の支持ヨーク(3)の分岐片(31)、(31)の後面側の分岐基部側の位置には貫通孔(h),(h)を設けてあり、その貫通孔(h),(h)を通して、リベット(7),(7)を車輪(5)の接地面近くの側面方向に向けてスライド可能に挿通してある。リベット(7)の頭部は、半球頭状に形成してある。
【0041】
〈操作および作用〉
ペダル型操作部材(6)の足踏み部(61a)を踏み込んで延設片(62),(62)を回動させると、ペダル型操作部材(6)は、軸(4)周りに回動して図10の(イ)の姿勢から(ロ)に姿勢に移行し、延設片(62),(62)のテーパー面によりリベット(7),(7)の頭部に押圧力が加わる。その結果、リベット(7),(7)が車輪(5)の接地面近くの側面方向にスライド移動し、リベット(7),(7)の頭部とは反対側の端部が、車輪(5)の接地面(外周面)近くの側面に接当し、車輪(5)がロックされる。
【0042】
ペダル型操作部材(6)の足踏み部(61a)を、たとえば足の爪先で持ち上げれば、ペダル型操作部材(6)が図10の(ロ)の姿勢から(イ)に姿勢に戻る結果、リベット(7),(7)の端部が車輪(5)からわずかに離れ、ロック解除状態になる。
【0043】
【発明の効果】
本発明においては、上記従来のキャスタの基本構成に、ペダル型操作部材(6)およびリベット(7),(7)を取り付けるという2つの工夫を講じてある。これにより、車輪(5)のロックをワンタッチで行うことができ、ロック解除もワンタッチで行うことができる。そしてこのときのロックは、車輪(5)の接地面(外周面)近くの側面への接当により行うので、車輪(5)の接地面を損傷することがなく、キャスタの寿命が長くなる。
【0044】
本発明によれば、既存の標準的なキャスタをそのまま利用することができ、ただ、ペダル型操作部材(6)およびリベット(7),(7)を取り付けるだけでよいので、コスト高となることを抑制でき、しかも全体がシンプルであるので、故障の要因が極めて少ない。
【図面の簡単な説明】
【図1】 本発明のストッパ手段付きキャスタの一例を示した側面図である。
【図2】 図1のキャスタの背面図である。
【図3】 図1のキャスタの底面図である。
【図4】 図1のキャスタの平面図である。
【図5】 図1のストッパ手段付きキャスタの取付台盤(1)、下部台盤(2)、支持ヨーク(3)の部分の縦断面図である。
【図6】 支持ヨーク(3)の縦断面図である。
【図7】 図1のキャスタのペダル型操作部材(6)の側面図である。
【図8】 図7のペダル型操作部材(6)の平面図である。
【図9】 図7のペダル型操作部材(6)の底面図である。
【図10】 本発明の操作および作用を示した説明図である。
【符号の説明】
(1)…取付台盤、
(2)…下部台盤、
(3)…支持ヨーク、
(31)…分岐片、(h)…貫通孔、
(4)…軸、
(5)…車輪、
(6)…ペダル型操作部材、
(61)…門形アーム部、
(61a)…足踏み部、(61b)…脚部、
(62)…延設片、
(7)…リベット、
(8)…ボルト、
(9)…ナット、
(10)…ワッシャ、
(11)…ベアリング[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a caster with stopper means, and more particularly to a caster with stopper means that stops rotation of a wheel by allowing a specific member to be pressed against a side surface near the ground contact surface (outer peripheral surface) of the wheel. is there.
[0002]
[Prior art]
Conventionally, casters are attached to the grounding parts of various portable items such as carts, carts, equipment / devices, container boxes, beds, desks, chairs, racks, wagons, etc. to facilitate movement. Yes.
[0003]
The caster is generally composed of members such as a mounting base, a lower base, a support yoke, a shaft, and wheels. In this case, the caster advance side (front side) of the support yoke is on the hypotenuse in the side view and the rear side (rear side) is almost vertical in the side view so that the wheels are naturally oriented in the forward direction when the caster is advanced. In general, the shaft that is supported by the lower end side of the support yoke is positioned behind the center line of the mounting base plate and the lower base plate.
[0004]
Depending on the application, the caster is often provided with a lock or stopper mechanism to prevent the wheels from rotating except during traveling. As such a lock or stopper mechanism, there are (a) a mechanism that stops the rotation of the wheel, (b) a mechanism that stops the rotation of the support yoke, and (c) a mechanism that stops both the rotation of the support yoke and the rotation of the wheel. is there. When stopping the rotation of the wheel, the braking member is often brought into contact with the outer peripheral surface serving as the ground contact surface of the wheel.
[0005]
For example, Japanese Patent Laid-Open No. 11-321208 discloses a mechanism that not only controls the rotation of the wheel and the turning of the support yoke at the same time, but also enables only the straight running by stopping only the turning of the support yoke. A caster with a brake device is shown.
[0006]
Japanese Patent Application Laid-Open No. 9-76704 discloses a caster with a lock mechanism in which the position of the brake operation lever is fixed regardless of the direction of the yoke so that the brake operation lever can be easily operated. Has been.
[0007]
Japanese Patent Laid-Open No. 6-16002 discloses a caster braking mechanism capable of simultaneously braking the turning of the frame and the rotation of the wheels.
[0008]
Japanese Utility Model Publication No. 8-5842 discloses a caster with a brake device that can simultaneously lock the rotation of the wheel and the rotation of the caster, or can selectively lock only the rotation of the caster.
[0009]
[Problems to be solved by the invention]
However, a conventional caster equipped with a lock or stopper mechanism generally has a large number of parts and is often complicated in structure, resulting in high cost and failure. In addition, in order to add a braking mechanism, the caster itself must be significantly changed, and there is a problem that it is difficult to use the existing caster.
[0010]
Under such a background, the present invention can reliably stop the rotation of the wheel by adopting a method of pressing a specific braking member on the side surface near the ground contact surface (outer peripheral surface) of the wheel with one touch. An object of the present invention is to provide a caster with stopper means that can be easily released, is simple in its entirety, and can be manufactured by simply taking some measures on an existing caster.
[0011]
[Means for Solving the Problems]
The caster with stopper means according to the present invention comprises a mounting base (1), a lower base (2), and a support yoke (3) provided rotatably with respect to the bases (1) and (2). A caster comprising a shaft (4) pivotally supported between the lower ends of the branch pieces (31) and (31) of the support yoke (3) and a wheel (5) mounted on the shaft (4). ,
A portal-shaped arm part (61) composed of a foot step part (61a) and two pieces of leg parts (61b) and (61b), and the leg part (61b) from the base end side of each leg part (61b) A pedal-type operating member (6) composed of two extended pieces (62) and (62) extended so as to form an L shape between them is connected to both branch pieces (31) of the support yoke (3). ), (31), and pivotally supported on the shaft (4) such that the stepped portion (61a) side of the gate-shaped arm portion (61) is located on the front side of the support yoke (3),
The inner surfaces of the extended pieces (62) and (62) of the pedal type operating member (6) are depressed around the foot (61a) to rotate the pedal type operating member (6) around the axis (4). The support yoke (3) is formed on a tapered surface such that the distance between the branch piece (31) and the outer surface of the (31) is reduced.
Through holes (h), (h) are provided at positions on the branch base side on the rear surface side of the branch pieces (31), (31) of the support yoke (3), and through the through holes (h), (h). The rivets (7) and (7) are slidably installed in the direction of the side surface near the ground contact surface of the wheel (5),
Accordingly, when the extension pieces (62) and (62) are rotated by stepping on the foot part (61a), the rivets (7) and (7) are formed by the tapered surfaces of the extension pieces (62) and (62). After the pressing force is applied to the head of 7) and the rivets (7) and (7) slide in the direction of the side surface near the ground contact surface of the wheel (5) , the rivets (7) and (7) The wheel (5) is locked so that the end opposite to the head abuts against the side surface of the wheel (5) near the ground contact surface ;
It is characterized by.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described in detail below.
[0013]
<Basic structure of casters>
As with the conventional casters, the casters are a mounting base plate (1), a lower base plate (2), and a support yoke (3) that is rotatably provided to the base plates (1) and (2). And a shaft (4) pivotally supported between lower ends of the branch pieces (31) and (31) of the support yoke (3), and a wheel (5) mounted on the shaft (4).
[0014]
Since the basic structure of the caster of the present invention is the same as that of a conventional caster, an existing caster can be used.
[0015]
<Improvement>
In the present invention, as described below, two measures are taken to attach the pedal-type operation member (6) and the rivets (7) and (7) to the basic structure of the conventional caster.
[0016]
<Pedal type operation member (6)>
The pedal-type operation member (6) includes a portal arm portion (61) composed of a stepping portion (61a) and two pieces of leg portions (61b) and (61b), and a base end side of each leg portion (61b). To the leg portion (61b) and two extending pieces (62) and (62) extended so as to form an L-shape.
[0017]
And this pedal type operation member (6) is sandwiched between both branch pieces (31), (31) of the support yoke (3), and the stepped part (61a) side of the portal arm part (61) is the support yoke. It is pivotally supported on the shaft (4) so as to be located on the front side of (3). For this reason, the shaft (4) is slightly longer than that of the conventional caster.
[0018]
The front side of the support yoke (3) refers to the surface on the caster advance side, and is usually formed on the hypotenuse (or curved hypotenuse) in side view. On the other hand, the rear surface side of the support yoke (3) refers to the rear side opposite to the caster advance side, and is usually formed to be a substantially vertical line in a side view.
[0019]
The inner surfaces of the extension pieces (62) and (62) of the pedal type operation member (6) are depressed around the foot (61a) to rotate the pedal type operation member (6) around the axis (4). In this case, the support yoke (3) is formed to have a tapered surface such that the distance between the branch pieces (31) and (31) and the outer surface becomes narrow. The angle of the tapered surface is preferably about 9 to 12 °. In addition, the part made into a taper surface is sufficient only in the part by the side of the free end of extended piece (62), (62).
[0020]
<Rivets (7), (7)>
Through holes (h), (h) are provided at positions on the branch base side on the rear side of the branch pieces (31), (31) of the support yoke (3), and the through holes (h), ( Through h), the rivets (7) and (7) are inserted and installed so as to be slidable toward the side surface near the ground contact surface of the wheel (5).
[0021]
The head of the rivet (7) is a hemispherical head so that the rivet (7) slides smoothly due to contact with the taper surfaces inside the extended pieces (62) and (62) of the pedal-type operating member (6). It is desirable to form in a shape.
[0022]
<Cooperation between the pedal-type operating member (6) and the rivets (7), (7)>
Since the pedal-type operating member (6) and the rivets (7) and (7) are configured as described above, when the extension pieces (62) and (62) are rotated by depressing the stepping portion (61a), A pressing force is applied to the heads of the rivets (7) and (7) by the tapered surfaces of the extended pieces (62) and (62), and the rivets (7) and (7) are close to the ground contact surface of the wheel (5). Slide in the side direction .
[0023]
As a result, the end of the rivet (7), (7) opposite to the head contacts the side surface near the ground contact surface (outer peripheral surface) of the wheel (5), and the wheel (5) is locked.
[0024]
To release the lock, the stepped portion (61a) of the pedal type operating member (6) may be lifted. As a result, the rivets (7) and (7) are slightly separated from the wheel (5), so that the rotation of the wheel (5) is no longer hindered. This lifting operation can be performed with the toes of the foot, and may be performed manually.
[0025]
【Example】
The following examples further illustrate the invention.
[0026]
Example 1
FIG. 1 is a side view showing an example of a caster with stopper means of the present invention.
FIG. 2 is a rear view of the caster of FIG.
FIG. 3 is a bottom view of the caster of FIG.
FIG. 4 is a plan view of the caster of FIG.
[0027]
FIG. 5 is a longitudinal sectional view of the mounting base (1), lower base (2), and support yoke (3) of the caster with stopper means of FIG.
FIG. 6 is a longitudinal sectional view of the support yoke (3).
[0028]
FIG. 7 is a side view of the pedal-type operating member (6) of the caster of FIG.
FIG. 8 is a plan view of the pedal-type operation member (6) of FIG.
FIG. 9 is a bottom view of the pedal-type operating member (6) of FIG.
[0029]
FIG. 10 is an explanatory view showing the operation and action of the present invention.
[0030]
<Basic structure of casters>
In FIGS. 1-6, a mounting base (1) is a bolt (8), a nut (9), and a washer (10) between it and a lower base (2) in the state which interposed the support yoke (3). ).
[0031]
The support yoke (3) is rotatable by a bearing (11) with its upper part sandwiched between the mounting base (1) and the lower base (2).
[0032]
The lower side of the support yoke (3) is divided into two forks, and the separated pieces constitute branch pieces (31) and (31). In this embodiment, the support yoke (3) is formed by cutting bamboo at an angle, and the front side is formed on the oblique side as viewed from the side. The rear surface side of the support yoke (3) is formed so as to have a gate shape when viewed from the rear, and the rear surface is substantially vertical in a side view.
[0033]
A shaft (4) is pivotally supported between the lower ends of the branch pieces (31) and (31) of the support yoke (3). A wheel (5) is mounted on the shaft (4).
[0034]
Of the above members, the mounting base (1), the lower base (2), and the support yoke (3) are usually injection molded products of plastics including ABS resin and polyamide resin (in the case of a large size). Fiber reinforced plastics or whisker reinforced plastics), but may be made of metal.
[0035]
<Pedal type operation member (6)>
As shown in FIGS. 1 to 3 and FIGS. 7 to 9, the pedal-type operation member (6) is an integrally molded product of the gate-shaped arm portion (61) and the two extended pieces (62), (62). Consists of.
[0036]
Of these, the gate-shaped arm portion (61) includes a stepping portion (61a) and two pieces of leg portions (61b) and (61b). The extending pieces (62) and (62) are extended so that an L-shape is formed between the leg portions (61b) from the base end side of each leg portion (61b). In this embodiment, the angle formed by the leg portion (61b) and the extending piece (62) is approximately 90 °.
[0037]
The pedal-type operation member (6) has a bifurcated piece (31), (31) of the support yoke (3) sandwiched between them, and the stepped part (61a) side of the portal arm part (61) It is pivotally supported on the shaft (4) so as to be located on the front side of 3).
[0038]
Since the pedal type operation member (6) is pivotally supported on the shaft (4) portion in this way, when using a standard product that is commercially available as a caster, the shaft (4) is more than that of the conventional caster. A slightly longer one is also used.
[0039]
The inner surface on the free end side of the extended pieces (62) and (62) of the pedal type operating member (6) is depressed around the pedal type operating member (6) around the axis (4) by stepping on the stepped portion (61a). The taper surface is formed such that the distance between the branching pieces (31) and (31) of the support yoke (3) and the outer surface of the support yoke (3) becomes narrow when the support yoke (3) is rotated (see FIG. 8). The angle θ of the tapered surface is 11 ° in this embodiment.
[0040]
<Rivets (7), (7)>
Through holes (h), (h) are provided at positions on the branch base side on the rear surface side of the branch pieces (31), (31) of the support yoke (3), and the through holes (h), ( Through h), the rivets (7) and (7) are slidably inserted toward the side surface near the ground contact surface of the wheel (5). The head of the rivet (7) has a hemispherical shape.
[0041]
<Operation and action>
When the stepped portion (61a) of the pedal type operating member (6) is depressed to rotate the extension pieces (62), (62), the pedal type operating member (6) rotates about the axis (4). Then, the posture changes from (B) to (B) in FIG. 10, and the pressing force is applied to the heads of the rivets (7) and (7) by the tapered surfaces of the extending pieces (62) and (62). As a result, the rivets (7) and (7) slide and move in the lateral direction near the ground contact surface of the wheel (5) , and the end of the rivet (7) and (7) opposite to the head is the wheel ( The wheel (5) is locked by contacting the side surface near the ground contact surface (outer peripheral surface) of 5).
[0042]
For example, if the stepping portion (61a) of the pedal-type operation member (6) is lifted by the toe of the foot, for example, the pedal-type operation member (6) returns from (B) to (I) in FIG. The ends of the rivets (7), (7) are slightly separated from the wheel (5) and the lock is released.
[0043]
【The invention's effect】
In the present invention, two measures are taken to attach the pedal type operation member (6) and the rivets (7), (7) to the basic structure of the conventional caster. Thereby, the wheel (5) can be locked with one touch, and the lock can be released with one touch. And since the lock at this time is performed by contact with the side surface near the ground contact surface (outer peripheral surface) of the wheel (5), the ground contact surface of the wheel (5) is not damaged, and the caster life is extended.
[0044]
According to the present invention, an existing standard caster can be used as it is, and only the pedal-type operation member (6) and the rivets (7) and (7) need to be attached. Since the entire system is simple, the cause of failure is extremely small.
[Brief description of the drawings]
FIG. 1 is a side view showing an example of a caster with stopper means of the present invention.
FIG. 2 is a rear view of the caster of FIG.
FIG. 3 is a bottom view of the caster of FIG. 1;
4 is a plan view of the caster of FIG. 1. FIG.
5 is a longitudinal sectional view of the mounting base (1), lower base (2), and support yoke (3) of the caster with stopper means of FIG. 1. FIG.
FIG. 6 is a longitudinal sectional view of a support yoke (3).
7 is a side view of a pedal-type operating member (6) of the caster of FIG. 1. FIG.
FIG. 8 is a plan view of the pedal type operation member (6) of FIG.
9 is a bottom view of the pedal type operation member (6) of FIG. 7. FIG.
FIG. 10 is an explanatory diagram showing the operation and action of the present invention.
[Explanation of symbols]
(1) ... Mounting base,
(2) ... Lower base,
(3) ... support yoke,
(31) ... branch piece, (h) ... through hole,
(4) ... axis,
(5) Wheel,
(6) ... Pedal type operation member,
(61) ... Portal arm,
(61a) ... stepping part, (61b) ... leg part,
(62) ... extended piece,
(7) ... Rivets,
(8) ... Bolt,
(9) ... Nut,
(10) ... washers,
(11) ... Bearing
Claims (2)
足踏み部(61a)と2片の脚部(61b),(61b)とからなる門形アーム部(61)と、それぞれの脚部(61b)の基端側から該脚部(61b)との間でL字形が形成されるように延設された2片の延設片(62),(62)とからなるペダル型操作部材(6)を、支持ヨーク(3)の両分岐片(31),(31)を挟むように、かつその門形アーム部(61)の足踏み部(61a)側が支持ヨーク(3)の前面側に位置するように、軸(4)に軸支すること、
前記ペダル型操作部材(6)の延設片(62),(62)の内側の面は、足踏み部(61a)を踏み込んでペダル型操作部材(6)を軸(4)周りに回動させたときに、支持ヨーク(3)の分岐片(31),(31)の外面との間隔が狭くなるようなテーパー面に形成してあること、
前記支持ヨーク(3)の分岐片(31),(31)の後面側の分岐基部側の位置に貫通孔(h),(h)を設けると共に、その貫通孔(h),(h)を通して、リベット(7),(7)を車輪(5)の接地面近くの側面方向に向けてスライド可能に挿通設置すること、
もって、足踏み部(61a)を踏み込んで延設片(62),(62)を回動させたときに、その延設片(62),(62)のテーパー面により前記リベット(7),(7)の頭部に押圧力が加わって、該リベット(7),(7)が車輪(5)の接地面近くの側面の方向にスライド移動した後、該リベット(7),(7)の頭部とは反対側の端部が車輪(5)の接地面近くの側面に当接して車輪(5)がロックされるようにしてあること、
を特徴とするストッパ手段付きキャスタ。Mounting base (1), lower base (2), support yoke (3) provided rotatably with respect to those bases (1) and (2), and branching of the support yoke (3) In the caster composed of the shaft (4) pivotally supported between the lower ends of the pieces (31) and (31) and the wheel (5) mounted on the shaft (4),
A portal-shaped arm part (61) composed of a foot step part (61a) and two pieces of leg parts (61b) and (61b), and the leg part (61b) from the base end side of each leg part (61b) A pedal-type operating member (6) composed of two extended pieces (62) and (62) extended so as to form an L shape between them is connected to both branch pieces (31) of the support yoke (3). ), (31), and pivotally supported on the shaft (4) such that the stepped portion (61a) side of the gate-shaped arm portion (61) is located on the front side of the support yoke (3),
The inner surfaces of the extended pieces (62) and (62) of the pedal type operating member (6) are depressed around the foot (61a) to rotate the pedal type operating member (6) around the axis (4). The support yoke (3) is formed on a tapered surface such that the distance between the branch piece (31) and the outer surface of the (31) is reduced.
Through holes (h), (h) are provided at positions on the branch base side on the rear surface side of the branch pieces (31), (31) of the support yoke (3), and through the through holes (h), (h). The rivets (7) and (7) are slidably installed in the direction of the side surface near the ground contact surface of the wheel (5),
Accordingly, when the extension pieces (62) and (62) are rotated by stepping on the foot part (61a), the rivets (7) and (7) are formed by the tapered surfaces of the extension pieces (62) and (62). After the pressing force is applied to the head of 7) and the rivets (7) and (7) slide in the direction of the side surface near the ground contact surface of the wheel (5) , the rivets (7) and (7) The wheel (5) is locked so that the end opposite to the head abuts against the side surface of the wheel (5) near the ground contact surface ;
A caster with stopper means.
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JP2001121511A JP4783515B2 (en) | 2001-04-19 | 2001-04-19 | Caster with stopper means |
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JP2001121511A JP4783515B2 (en) | 2001-04-19 | 2001-04-19 | Caster with stopper means |
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JP5709681B2 (en) * | 2011-07-21 | 2015-04-30 | シャープ株式会社 | Wheel device and air conditioner |
JP2016185807A (en) * | 2016-06-17 | 2016-10-27 | シャープ株式会社 | Wheel device and air conditioner |
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JPS52145942A (en) * | 1976-05-29 | 1977-12-05 | Hanmar Caster Kk | Brake device of caster |
JPS5519689U (en) * | 1978-07-26 | 1980-02-07 | ||
JPH0368735U (en) * | 1989-11-06 | 1991-07-08 | ||
JP2927345B2 (en) * | 1996-07-25 | 1999-07-28 | 株式会社内村製作所 | Caster with brake |
JP3068735U (en) * | 1999-11-04 | 2000-05-16 | 正看 温 | Free-wheel brake structure |
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