JP6586071B2 - Stopper structure for wheels - Google Patents

Stopper structure for wheels Download PDF

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JP6586071B2
JP6586071B2 JP2016218602A JP2016218602A JP6586071B2 JP 6586071 B2 JP6586071 B2 JP 6586071B2 JP 2016218602 A JP2016218602 A JP 2016218602A JP 2016218602 A JP2016218602 A JP 2016218602A JP 6586071 B2 JP6586071 B2 JP 6586071B2
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wheel
pair
locking
cam
locking female
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耕太 雄島
耕太 雄島
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株式会社ユーエイ
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Description

本発明は、車輪用ストッパ構造に関する。   The present invention relates to a stopper structure for a wheel.

従来、車輪のタイヤ部に対しブレーキ板を直接的に押し付けて、摩擦力によって車輪の回転を阻止する車輪用ストッパ装置が提案されている(特許文献1参照)。   2. Description of the Related Art Conventionally, there has been proposed a wheel stopper device that directly presses a brake plate against a tire portion of a wheel and prevents rotation of the wheel by frictional force (see Patent Document 1).

特開2014−210552号公報JP 2014-210552 A

しかし、従来の車輪用ストッパ装置は、車輪のタイヤ部又はブレーキパットの摩耗に伴う摩擦力の低下によって、あるいは、車輪のタイヤ部に水分又は油汚れ等が付着することによる摩擦力の低下によって、制動効果が弱まるという問題があった。また、車輪のタイヤ部にブレーキ板が食い込んで、車輪が破損するという欠点があった。   However, the conventional wheel stopper device is caused by a decrease in frictional force due to wear of a wheel tire part or a brake pad, or a decrease in frictional force due to adhesion of moisture or oil stains to the wheel tire part. There was a problem that the braking effect was weakened. In addition, there is a disadvantage that the brake plate bites into the tire portion of the wheel and the wheel is damaged.

そこで、本発明は、車輪のタイヤ部との摩擦を利用しない車輪用ストッパ構造を提供することを目的とする。   Then, an object of this invention is to provide the stopper structure for wheels which does not utilize the friction with the tire part of a wheel.

本発明に係る車輪用ストッパ構造は、車輪軸心を中心とする円周上に複数の孔部又は凹部から成る係止雌部を有するディスクが、左右各車輪の内側部に固設され、車台側に、水平方向スライド自在に設けられて上記係止雌部に先端の係止雄部が係合する左右一対のシャフトと、上記係止雄部が上記係止雌部に係合する方向に上記各シャフトを弾発付勢する弾発部材とを、備え、さらに、上記弾発部材の弾発付勢力に抗して左右一対の上記シャフトを水平内方向にスライドさせるリリース操作手段を、備え、上記リリース操作手段は、左右一対の上記シャフトの端部に設けたカムローラを昇降に伴って相互に接近・離反させるテーパー状カム面が形成された昇降部材と、上記カムローラが相互に離反する方向に上記昇降部材を弾発付勢する弾発部材と、上記カムローラが相互に接近する方向に上記昇降部材に引張力を作用させる可撓性引張ワイヤと、該可撓性引張ワイヤに連動連結される手動操作部とを、備えているものである。 In the wheel stopper structure according to the present invention, a disk having a locking female portion formed of a plurality of holes or recesses on a circumference centered on a wheel axis is fixed to the inner side of each of the left and right wheels. A pair of left and right shafts that are slidable in the horizontal direction and engage with the engaging female portion at the tip thereof, and each of the engaging male portions in the direction in which the engaging male portion engages with the engaging female portion. and a resilient member for resiliently urging the shaft, comprising, further, the release operation means for sliding the pair of the shaft in the horizontal in direction against the bullet with onset force of the resilient member, with said The release operation means includes an elevating member formed with a tapered cam surface that causes the cam rollers provided at the ends of the pair of left and right shafts to approach and separate from each other as they move up and down, and the cam roller in the direction in which the cam rollers are separated from each other. Bounce that energizes the lifting member And wood, a flexible pull wire the cam roller exerts a tensile force to the lifting member in a direction to approach each other, and a manual operating unit which is operatively connected to the flexible tension wire, in which comprises is there.

また、左右各車輪のホイール部の内側面に、車輪軸心を中心とする円周上に複数の孔部又は凹部から成る係止雌部が形成され、車台側に、水平方向スライド自在に設けられて上記係止雌部に先端の係止雄部が係合する左右一対のシャフトと、上記係止雄部が上記係止雌部に係合する方向に上記各シャフトを弾発付勢する弾発部材とを、備え、さらに、上記弾発部材の弾発付勢力に抗して左右一対の上記シャフトを水平内方向にスライドさせるリリース操作手段を、備え、上記リリース操作手段は、左右一対の上記シャフトの端部に設けたカムローラを昇降に伴って相互に接近・離反させるテーパー状カム面が形成された昇降部材と、上記カムローラが相互に離反する方向に上記昇降部材を弾発付勢する弾発部材と、上記カムローラが相互に接近する方向に上記昇降部材に引張力を作用させる可撓性引張ワイヤと、該可撓性引張ワイヤに連動連結される手動操作部とを、備えているものである。 In addition, on the inner surface of the wheel part of each of the left and right wheels, a locking female part consisting of a plurality of holes or recesses is formed on the circumference centered on the wheel axis, and is provided on the chassis side so as to be slidable in the horizontal direction. A pair of left and right shafts that engage the engaging female portion at the tip with the engaging female portion, and a spring that elastically biases each shaft in a direction in which the engaging male portion engages the engaging female portion. And a release operation means that slides the pair of left and right shafts in a horizontal inward direction against the elastic biasing force of the elastic member , and the release operation means includes the pair of left and right An elevating member formed with a tapered cam surface that causes the cam rollers provided at the end of the shaft to approach and separate from each other as the elevating and lowering, and a bullet that elastically biases the elevating member in a direction in which the cam rollers are separated from each other. The emitting member and the cam roller are in contact with each other. A flexible tension wire exerts a tensile force to the lifting member in the direction of, the manual operating unit which is operatively connected to the flexible tension wire, in which are provided.

た、上記手動操作部は、手押し台車の折畳み自在のハンドルの上端部近傍に設けられているものである。 Also, the manual operating unit is one that is provided in the vicinity of the upper end portion of the universal handle folding hand truck.

本発明の車輪用ストッパ構造によれば、係止雌部と係止雄部の係合によって、確実に車輪の回転を阻止できる。車輪のタイヤ部の摩耗や水分又は油汚れ等の付着による摩擦力の低下、及び、車輪の破損を生じることがなく、長期の使用期間にわたって制動力を維持できる。左右各車輪に対し、個別に制動力を作用させることができ、故障によって左右の内の片方の車輪の制動が効かなくなった場合であっても、もう片方の車輪の回転を確実に阻止でき、台車等の不意の自走等の事故を防ぎ、安全性を向上できる。   According to the stopper structure for a wheel of the present invention, the rotation of the wheel can be reliably prevented by the engagement of the locking female portion and the locking male portion. The braking force can be maintained over a long period of use without causing a decrease in frictional force due to wear of the tire portion of the wheel, adhesion of moisture or oil stains, and damage to the wheel. A braking force can be applied individually to each of the left and right wheels, and even if the braking of one of the left and right wheels is not effective due to a failure, the other wheel can be reliably prevented from rotating, It is possible to prevent accidents such as unintentional self-running such as carts and improve safety.

本発明の実施の一形態を示した断面側面図である。It is the cross-sectional side view which showed one Embodiment of this invention. 本発明の実施の一形態を示した断面正面図である。It is the section front view showing one embodiment of the present invention. 本発明の車輪用ストッパ構造の車輪ロック状態を示した断面正面図である。It is the section front view showing the wheel lock state of the stopper structure for wheels of the present invention. 本発明の車輪用ストッパ構造の車輪ロック解除状態を示した断面正面図である。It is the cross-sectional front view which showed the wheel lock release state of the stopper structure for wheels of this invention. 本発明の車輪用ストッパ構造を備えた手押し台車を示す斜視図である。It is a perspective view which shows the handcart provided with the stopper structure for wheels of this invention. 手押し台車のハンドルの上端部を示す拡大断面側面図である。It is an expanded sectional side view which shows the upper end part of the handle | steering-wheel of a handcart. 本発明の他の実施形態を示した要部拡大断面正面図である。It is a principal part expanded sectional front view which showed other embodiment of this invention. 本発明の別の実施形態を示した要部拡大断面正面図である。It is a principal part expanded sectional front view which showed another embodiment of this invention. 本発明のさらに別の実施形態を示した要部拡大断面正面図である。It is a principal part expanded sectional front view which showed another embodiment of this invention. 本発明の車輪用ストッパ構造の作用を説明する要部拡大正面図である。It is a principal part enlarged front view explaining the effect | action of the stopper structure for wheels of this invention.

以下、実施の形態を示す図面に基づき本発明を詳細に説明する。
図5に示すように、本発明の車輪用ストッパ構造は、手押し台車10等に搭載され、手押し台車10等を停止しておく際に、車輪3,3の回転を阻止して車輪ロック状態とすることができる。さらに、手押し台車10を移動させる際には、車輪3,3が回転自在な車輪ロック解除状態とすることができる。本発明の車輪用ストッパ構造は、手押し台車10等の車台2の下面後端寄りに設けられた、鉛直軸心廻りに旋回しない固定式キャスター1の車輪3に制動力を作用させて、手押し台車10を停止保持する。
Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments.
As shown in FIG. 5, the wheel stopper structure of the present invention is mounted on the handcart 10 or the like, and when the handcart 10 or the like is stopped, the wheels 3 and 3 are prevented from rotating and the wheel lock state is established. can do. Further, when the hand cart 10 is moved, the wheels 3 and 3 can be in a wheel unlocking state in which the wheels 3 and 3 can rotate. The wheel stopper structure of the present invention applies a braking force to the wheel 3 of the fixed caster 1 that is provided near the rear end of the lower surface of the chassis 2 such as the handcart 10 and does not turn around the vertical axis, thereby providing a handcart. 10 is stopped and held.

図1に示すように、車輪3は、その内側部に、ディスク4が固設されている。
ディスク4は、車輪軸心Lを中心とする円周上に複数の孔部から成る係止雌部5を有している。係止雌部5は、ディスク4の外端縁に沿って配設され、複数の孔部が、所定の等ピッチで、円を描くように列設されている。隣り合う孔部と孔部は、制動時の強度を確保するために、所定の間隔をもって離間しており、言い換えると、孔部と孔部の相互間には、耐回転用残部が形成されている。図例では、ディスク4の内端近傍が、ボルトによって車輪3(ホイール部13)の内側部に固着されているが、ホイール部13に対しディスク4をインサート成型によって固設するも好ましい。
図2に示すように、ディスク4は、車輪3のホイール部13の内側面に密着しており、ディスク4の孔部(係止雌部5)への粉塵の侵入を少なくし、かつ、車輪3の水洗い等の清掃が容易となっている。
As shown in FIG. 1, the wheel 3 has a disk 4 fixed on the inner side thereof.
Disk 4 has an Kakaritomemesu portion 5 consisting of a plurality of holes on the circumference around the wheel axis L 0. The locking female part 5 is disposed along the outer edge of the disk 4, and a plurality of holes are arranged in a circle at a predetermined equal pitch. The adjacent holes are separated from each other by a predetermined interval in order to ensure the strength during braking. In other words, a rotation-resistant remaining portion is formed between the holes. Yes. In the illustrated example, the vicinity of the inner end of the disk 4 is fixed to the inner side of the wheel 3 (wheel part 13) with a bolt, but it is also preferable to fix the disk 4 to the wheel part 13 by insert molding.
As shown in FIG. 2, the disk 4 is in close contact with the inner surface of the wheel portion 13 of the wheel 3, reduces the intrusion of dust into the hole (locking female portion 5) of the disk 4, and the wheel. It is easy to clean 3 and so on.

図2では、車台2側に固着された支持ヨーク20に、ボス(カラー)21が固設され、このボス(カラー)21の孔部に、係止雄部6を有するシャフト7が、水平方向スライド自在に挿入されている。
係止雄部6は、ディスク4の係止雌部5に、挿入・離脱自在に係合するようシャフト7の先端に設けられている。係止雄部6の直径は、係止雌部5(孔部)の直径より僅かに小さく設定され、係止雌部5に対し係止雄部6が嵌入されると言い換えることもできる。
なお、ディスク4とシャフト7は、鋼を熱処理することで、高硬度となり、耐摩耗性に優れ、長期にわたって使用できる利点がある。
In FIG. 2, a boss (collar) 21 is fixed to a support yoke 20 fixed to the chassis 2 side, and a shaft 7 having a locking male portion 6 is horizontally slid in a hole of the boss (collar) 21. It is inserted freely.
The locking male portion 6 is provided at the distal end of the shaft 7 so as to be engaged with the locking female portion 5 of the disk 4 so as to be freely inserted and removed. In other words, the diameter of the locking male part 6 is set slightly smaller than the diameter of the locking female part 5 (hole), and the locking male part 6 is inserted into the locking female part 5.
The disk 4 and the shaft 7 have an advantage that they are hardened by heat-treating steel, have excellent wear resistance, and can be used over a long period of time.

図3と図4に示すように、車台2には、床壁の下面の左右中間位置に、固定取付部22が下方突出状に設けられているが、この固定取付部22は、例えば、四角形筒型のケーシングから成り、剛性が大きく、横断面が扁平矩形状であって、下方開口状箱型である。この固定取付部22の左右両側壁に固着されたボス(カラー)23,23の孔部に、左右に分離して配設された一対のシャフト7,7の基端部が挿入されている。
また、左右各シャフト7の先端の係止雄部6が係止雌部5に係合する方向に各シャフト7を弾発付勢する弾発部材8を備えている。弾発部材8は、圧縮コイルばねから成り、シャフト7の長手方向中間部に設けた外鍔状部24と、固定取付部22に固着したボス(カラー)23との間に介在して、伸長方向(左右外方向)に常時弾発付勢力Fを作用させる。
As shown in FIGS. 3 and 4, the chassis 2 is provided with a fixed mounting portion 22 in a downward projecting manner at a left and right intermediate position on the lower surface of the floor wall. It is made of a cylindrical casing, has high rigidity, has a flat rectangular cross section, and is a downward opening box shape. The base end portions of a pair of shafts 7, 7 disposed separately on the left and right sides are inserted into holes of bosses (collars) 23, 23 fixed to the left and right side walls of the fixed mounting portion 22.
In addition, a resilient member 8 that resiliently biases each shaft 7 in a direction in which the locking male portion 6 at the tip of each of the left and right shafts 7 engages with the locking female portion 5 is provided. The elastic member 8 is composed of a compression coil spring, and is interposed between an outer flange-shaped portion 24 provided at the middle portion in the longitudinal direction of the shaft 7 and a boss (collar) 23 fixed to the fixed mounting portion 22 to extend. The bullet urging force F is always applied in the direction (left and right outward direction).

さらに、本発明の車輪用ストッパ構造は、弾発部材8の弾発付勢力Fに抗して、左右一対のシャフト7,7を、水平内方向にスライドさせるためのリリース操作手段9を、備えている。
リリース操作手段9は、固定取付部22内で上下方向に移動自在の昇降部材16と、昇降部材16を下方へ弾発付勢する弾発部材17と、昇降部材16を上方へ引き上げるための可撓性引張ワイヤ18と、可撓性引張ワイヤ18に連動連結される手動操作部12とを、備えている。
昇降部材16は、矩形状の金属板片(プレート)で形成され、左右対称に形成された一対のカム用窓部25,25が形成されている。カム用窓部25,25には、左右一対のシャフト7,7の端部に設けたカムローラ14,14が移動自在に収納され、昇降部材16の昇降に伴って、左右のカムローラ14,14を相互に接近・離反させるテーパー状カム面15,15が形成されている。テーパー状カム面15,15は、各カム用窓部25の外面を形成し、下方へ向かうにつれて次第に接近し合うように形成された左右一対の勾配面である。即ち、各カム用窓部25は、上部から下部に向かうにつれて次第に幅が狭くなっている。なお、昇降部材16は、左右両側端縁に、固定取付部22の左右両側壁に当たって止まるストッパ片26,26が突設され、固定取付部22内での上下動を所定範囲に制限されている。
Furthermore, the wheel stopper structure of the present invention includes release operation means 9 for sliding the pair of left and right shafts 7 and 7 in the horizontal inward direction against the impact urging force F of the impact member 8. ing.
The release operation means 9 includes an elevating member 16 that is movable in the vertical direction within the fixed mounting portion 22, a resilient member 17 that elastically urges the elevating member 16 downward, and a pulling member 16 that can be lifted upward. A flexible tension wire 18 and a manual operation unit 12 that is interlocked and connected to the flexible tension wire 18 are provided.
The elevating member 16 is formed of a rectangular metal plate piece (plate), and is formed with a pair of cam window portions 25, 25 formed symmetrically. Cam rollers 14, 14 provided at the ends of the pair of left and right shafts 7, 7 are movably accommodated in the cam windows 25, 25, and the left and right cam rollers 14, 14 are moved as the elevating member 16 moves up and down. Tapered cam surfaces 15 and 15 are formed to approach and separate from each other. The tapered cam surfaces 15 and 15 are a pair of left and right gradient surfaces that form the outer surface of each cam window 25 and gradually approach each other as they go downward. That is, the width of each cam window 25 is gradually narrowed from the top to the bottom. The elevating member 16 is provided with stopper pieces 26 and 26 projecting from the left and right side edges of the fixed mounting portion 22 so as to stop against the left and right side walls, and the vertical movement in the fixed mounting portion 22 is limited to a predetermined range. .

図3に示すように、昇降部材16が、弾発部材17の弾発付勢力によって押し下げられた際、弾発部材8,8の弾発付勢力F,Fによって、シャフト7,7が相互に離反する方向(水平外方向)にスライドする。シャフト7,7が水平外方向にスライドすると、左右各車輪3の係止雌部5に係止雄部6が係合して、車輪3の回転が阻止されて、車輪ロック状態となる。   As shown in FIG. 3, when the elevating member 16 is pushed down by the elastic urging force of the elastic member 17, the shafts 7 and 7 are mutually moved by the elastic urging forces F and F of the elastic members 8 and 8. Slide in the direction away (horizontally outward). When the shafts 7 and 7 slide in the horizontal outward direction, the locking male part 6 engages with the locking female part 5 of each of the left and right wheels 3, and the rotation of the wheel 3 is prevented, and the wheel is locked.

図4に示すように、昇降部材16が、可撓性引張ワイヤ18の引張力Tによって引き上げられた際、テーパー状カム面15,15によってカムローラ14,14が相互に接近するよう案内されて、弾発部材8,8の弾発付勢力F,Fに抗して、シャフト7,7が水平内方向にスライドする。シャフト7,7が水平内方向にスライドすると、左右各車輪3の係止雌部5から係止雄部6が離脱して、車輪3が回転自在となり、車輪ロック解除状態となる。   As shown in FIG. 4, when the elevating member 16 is pulled up by the tensile force T of the flexible pull wire 18, the cam rollers 14 and 14 are guided by the tapered cam surfaces 15 and 15 so as to approach each other. The shafts 7 and 7 slide in the horizontal inward direction against the resilient urging forces F and F of the resilient members 8 and 8. When the shafts 7 and 7 slide in the horizontal inward direction, the locking male portion 6 is detached from the locking female portion 5 of each of the left and right wheels 3, the wheel 3 becomes rotatable, and the wheel lock is released.

図5と図6に示すように、手動操作部12は、手押し台車10のハンドル11の上端部11a近傍に設けられている。
手動操作部12は、ハンドル11の左右一対の縦杆11b,11bの上端寄りに固着された枢支部12b,12bと、枢支部12b,12bに枢着され所定角度(30度)で揺動自在のレバー12aを有している。手動操作部12は、レバー12aを手前(ハンドル11の上端部11aに接近する方向)に引くことで、可撓性引張ワイヤ18が引っ張られ、車輪ロック状態から車輪ロック解除状態に切換えるように構成されている。
可撓性引張ワイヤ18は、ハンドル11の縦杆11bに沿って、車台2の下面に設けられた昇降部材16に連結されている。可撓性引張ワイヤ18は、ハンドル11と共に折畳むことができる。従って、手押し台車10の不使用時には、車台2とハンドル11を平行状として折畳んでおくことができる。なお、ハンドル11は、縦杆11b,11bの上端寄りの部位が約15度前方へ傾いている。
As shown in FIGS. 5 and 6, the manual operation unit 12 is provided in the vicinity of the upper end portion 11 a of the handle 11 of the handcart 10.
The manual operation portion 12 is pivotally attached to the pivot portions 12b and 12b fixed to the upper end of the pair of left and right vertical rods 11b and 11b of the handle 11, and the pivot portions 12b and 12b, and is swingable at a predetermined angle (30 degrees). The lever 12a is provided. The manual operation unit 12 is configured so that the flexible pull wire 18 is pulled by pulling the lever 12a forward (in a direction approaching the upper end portion 11a of the handle 11), and the wheel lock state is switched to the wheel lock release state. Has been.
The flexible pull wire 18 is connected to the elevating member 16 provided on the lower surface of the chassis 2 along the vertical rod 11 b of the handle 11. The flexible pull wire 18 can be folded together with the handle 11. Therefore, when the handcart 10 is not used, the chassis 2 and the handle 11 can be folded in parallel. In addition, as for the handle | steering-wheel 11, the site | part near the upper end of the vertical hooks 11b and 11b inclines forward about 15 degree | times.

上述した本発明の車輪用ストッパ構造の使用方法(作用)について説明する。
図4に示すように、手押し台車10を移動させる際、ハンドル11の上端部11aを握る手で手動操作部12のレバー12aを手前に引き、車輪3,3が回転自在な車輪ロック解除状態とし、ハンドル11を押して手押し台車10を走行させる。
手押し台車10を停止しておく際、レバー12aから手を離すと、車輪3,3に制動力が作用する。この際、図3に示すように、昇降部材16が、弾発部材17の弾発付勢力によって押し下げられて、左右一対のシャフト7,7が、弾発部材8,8の弾発付勢力F,Fを受けて、相互に離反する方向(水平外方向)にスライドすることで、係止雌部5に係止雄部6が係合する。係止雄部6と係止雌部5の係合によって、左右各車輪3の回転が阻止され、車輪ロック状態となる。手押し台車10を坂道や傾斜のある場所で使用する際、車輪3,3を完全にロック(固定)して、安全に停止させることが可能となる。
車台2に固着された固定取付部22は、例えば、四角形筒型のケーシングから成り、剛性が大きく、左右にブレて(振れて)動くことなく昇降部材16を上下スライド可能として保持し、左右一対のシャフト7,7が水平外方向にスライドして、係止雌部5に係止雄部6が確実に係合する。また、昇降部材16の上下動もスムーズに行われる。
The use method (action) of the above-described wheel stopper structure of the present invention will be described.
As shown in FIG. 4, when the handcart 10 is moved, the lever 12a of the manual operation unit 12 is pulled to the front with a hand grasping the upper end portion 11a of the handle 11, and the wheels 3 and 3 are in a wheel unlocking state in which the wheels 3 and 3 are rotatable. Then, the handle 11 is pushed to run the hand cart 10.
When the hand cart 10 is stopped, if the hand is released from the lever 12a, the braking force is applied to the wheels 3 and 3. At this time, as shown in FIG. 3, the elevating member 16 is pushed down by the elastic urging force of the elastic member 17, so that the pair of left and right shafts 7, 7 has an elastic urging force F of the elastic members 8, 8. , F, and slides in a direction away from each other (horizontal outward direction), the locking male portion 6 engages with the locking female portion 5. Due to the engagement of the locking male part 6 and the locking female part 5, the rotation of the left and right wheels 3 is prevented and the wheel is locked. When the hand truck 10 is used on a slope or an inclined place, the wheels 3 and 3 can be completely locked (fixed) and stopped safely.
The fixed mounting portion 22 fixed to the chassis 2 is made of, for example, a rectangular cylindrical casing, has a large rigidity, holds the elevating member 16 so as to be vertically slidable without moving (shaking) left and right, and a pair of left and right The shafts 7 and 7 slide in the horizontal outward direction, and the locking male portion 6 is securely engaged with the locking female portion 5. Further, the vertical movement of the elevating member 16 is also performed smoothly.

本発明の車輪用ストッパ構造は、左右の車輪3,3の各々に、個別に制動力が作用する構造となっており、例えば、左右一方のシャフト7のカムローラ14が脱落したり、左右一方の車輪3のディスク4が破損したりといった故障が原因で、左右の内の片方の車輪3の制動が効かなくなった場合であっても、もう片方の車輪3の回転を阻止することが可能である。この場合でも、固定取付部22が昇降部材16を左右に振れないように確実に保持し、片方のシャフト7の係止雄部6が、係止雌部5に確実に係合する。   The wheel stopper structure of the present invention has a structure in which a braking force is individually applied to each of the left and right wheels 3, 3. For example, the cam roller 14 of one of the left and right shafts 7 falls off, Even when the braking of one of the left and right wheels 3 is not effective due to a failure such as the disk 4 of the wheel 3 being damaged, the rotation of the other wheel 3 can be prevented. . Even in this case, the fixed mounting portion 22 securely holds the elevating member 16 so as not to swing left and right, and the locking male portion 6 of the one shaft 7 is reliably engaged with the locking female portion 5.

なお、図7に示すように、ディスク4は、係止雄部6が係合可能な凹部から成る係止雌部5を有していても良い。即ち、ディスク4に設けられる係止雌部5は、貫通状の孔部に限定されず、非貫通状の凹部(凹窪部)をもって形成することもある。   As shown in FIG. 7, the disk 4 may have a locking female portion 5 formed of a recess with which the locking male portion 6 can be engaged. That is, the engaging female portion 5 provided on the disk 4 is not limited to the through hole, and may be formed with a non-through recess (concave portion).

また、図8に示すように、車輪3のホイール部13の内側面に凹部(凹窪部)を直接に形成するも好ましい。即ち、ディスク4を省略して、車輪3のホイール部13に係止雌部5が設けられている。なお、図示省略するが、係止雌部5は、車輪3のホイール部13を貫通する孔部をもって形成しても良い。車輪3のホイール部13は、鋼板又は硬質合成樹脂、あるいは、鋳物(アルミダイキャスト)で形成しても良い。   Moreover, as shown in FIG. 8, it is also preferable to form a recessed part (concave part) directly in the inner surface of the wheel part 13 of the wheel 3. As shown in FIG. That is, the disk 4 is omitted and the locking female portion 5 is provided on the wheel portion 13 of the wheel 3. Although not shown, the locking female portion 5 may be formed with a hole that penetrates the wheel portion 13 of the wheel 3. The wheel portion 13 of the wheel 3 may be formed of a steel plate, a hard synthetic resin, or a casting (aluminum die cast).

ここで、本発明の車輪用ストッパ構造の破壊防止機能について説明する。
従来式のストッパ構造は、車輪のタイヤ部に対しブレーキ板を直接的に押し付ける為、タイヤ部に過大な力が加わると、タイヤ部又はブレーキ板の破損を招いていた。本発明の車輪用ストッパ構造では、車輪3に過大な力が付与された場合であっても、ディスク4やシャフト7が破損しない構造となっている。
具体的には、図9(A)に示すように、係止雌部5を弯曲凹面状とし、かつ、係止雄部6を弯曲凸面状に形成することにより、図中矢印Mに示すような過大な力が車輪3に付与された際、係止雄部6が係止雌部5に摺動して、係合が解除されるように構成されている。即ち、係止雄部6が係止雌部5から離脱することによりディスク4・シャフト7の破損を回避できる構造となっている。
また、図9(B)に示すように、係止雌部5をテーパー状凹部とし、係止雄部6をテーパー状凸部としても良い。係止雌部5が車輪3のホイール部13の内側面に設けられることもあるが、係止雄部6が係止雌部5から離脱する構造として、ホイール部13・シャフト7の破損を回避できる。
Here, the destruction prevention function of the wheel stopper structure of the present invention will be described.
Since the conventional stopper structure directly presses the brake plate against the tire portion of the wheel, if an excessive force is applied to the tire portion, the tire portion or the brake plate is damaged. In the wheel stopper structure of the present invention, even when an excessive force is applied to the wheel 3, the disk 4 and the shaft 7 are not damaged.
Specifically, as shown in FIG. 9A, the locking female portion 5 is formed in a curved concave shape, and the locking male portion 6 is formed in a curved convex shape, so that the arrow M in the figure indicates. When an excessive force is applied to the wheel 3, the locking male part 6 slides on the locking female part 5 so that the engagement is released. That is, the locking male portion 6 is separated from the locking female portion 5 so that the disk 4 and the shaft 7 can be prevented from being damaged.
Further, as shown in FIG. 9B, the engaging female portion 5 may be a tapered concave portion, and the engaging male portion 6 may be a tapered convex portion. Although the latching female part 5 may be provided on the inner surface of the wheel part 13 of the wheel 3, as a structure in which the latching male part 6 is detached from the latching female part 5, damage to the wheel part 13 and the shaft 7 can be avoided. .

図10に示すように、昇降部材16のテーパー状カム面15,15は、(鉛直基準線に対する)傾斜角θが45度未満に設定されている。
昇降部材16を引き上げる際、テーパー状カム面15がカムローラ14との接点Pから受ける斜め方向の力Fは、水平方向の力Fと、鉛直方向の力Fに分解することができる。傾斜角θが45度未満とすることで、水平方向の力Fより鉛直方向の力Fが小さくなり(F>F)、昇降部材16を小さな力で引き上げることができる利点がある。従って、手押し台車10を走行させる使用者が、手動操作部12のレバー12aを容易に操作でき、レバー12aを握ったまま手押し台車10を走行させる際にも、使用者が大きな握力を必要とせず、手が疲れにくい。
As shown in FIG. 10, the tapered cam surfaces 15 and 15 of the elevating member 16 have an inclination angle θ (relative to the vertical reference line) set to less than 45 degrees.
When the elevating member 16 is pulled up, the oblique force F 0 that the tapered cam surface 15 receives from the contact point P with the cam roller 14 can be decomposed into a horizontal force F 1 and a vertical force F 2 . When the inclination angle θ is less than 45 degrees, the vertical force F 2 is smaller than the horizontal force F 1 (F 1 > F 2 ), and there is an advantage that the elevating member 16 can be pulled up with a small force. . Therefore, the user who runs the hand cart 10 can easily operate the lever 12a of the manual operation unit 12, and the user does not need a large gripping force when the hand cart 10 is traveled while holding the lever 12a. , Hands are hard to get tired.

なお、本発明の車輪用ストッパ構造は、折畳み自在のハンドル11を有する手押し台車10だけでなく、例えば、ハンドルの無い平台車や、ロールボックスパレット、あるいは、ショッピングセンターで使用されるカート等に適用することができる。   The wheel stopper structure of the present invention is applied not only to the hand cart 10 having the foldable handle 11 but also to a flat cart without a handle, a roll box pallet, a cart used in a shopping center, or the like. can do.

以上のように、本発明に係る車輪用ストッパ構造は、車輪軸心Lを中心とする円周上に複数の孔部又は凹部から成る係止雌部5を有するディスク4が、左右各車輪3の内側部に固設され、車台2側に、水平方向スライド自在に設けられて上記係止雌部5に先端の係止雄部6が係合する左右一対のシャフト7,7と、上記係止雄部6が上記係止雌部5に係合する方向に上記各シャフト7を弾発付勢する弾発部材8とを、備え、さらに、上記弾発部材8の弾発付勢力Fに抗して左右一対の上記シャフト7,7を水平内方向にスライドさせるリリース操作手段9を、備えているので、係止雌部5と係止雄部6の係合によって、確実に車輪3の回転を阻止できる。車輪3のタイヤ部の摩耗や水分又は油汚れ等の付着による摩擦力の低下、及び、車輪3の破損を生じることがなく、長期の使用期間にわたって制動力を維持できる。左右各車輪3に対し、個別に制動力を作用させることができ、故障によって左右の内の片方の車輪3の制動が効かなくなった場合であっても、もう片方の車輪3の回転を確実に阻止でき、台車10等の不意の自走等の事故を防ぎ、安全性を向上できる。ディスク4の耐久性に優れ、長期にわたって故障を防止して、車輪3の交換の手間を省くことができる。 As described above, the wheel stopper structure according to the present invention, the disk 4 with Kakaritomemesu portion 5 including a plurality of holes or recesses on the circumference around the wheel axis L 0 is the left and right wheels 3, a pair of left and right shafts 7, 7 which are provided on the chassis 2 side so as to be slidable in the horizontal direction and engage with the locking male portion 6 at the tip of the locking female portion 5. A resilient member 8 that resiliently biases each shaft 7 in a direction in which the stationary male portion 6 engages with the locking female portion 5, and further resists the resilient biasing force F of the resilient member 8. Since the release operation means 9 for sliding the pair of left and right shafts 7 and 7 in the horizontal inward direction is provided, the engagement of the locking female portion 5 and the locking male portion 6 ensures the rotation of the wheel 3. I can stop. The braking force can be maintained over a long period of use without causing a decrease in frictional force due to wear of the tire portion of the wheel 3 or adhesion of moisture or oil stains, and damage to the wheel 3. A braking force can be applied individually to each of the left and right wheels 3, and even if the braking of one of the left and right wheels 3 becomes ineffective due to a failure, the other wheel 3 is reliably rotated. It can prevent, accidents such as unexpected self-propelling such as the carriage 10 can be prevented, and safety can be improved. The durability of the disk 4 is excellent, failure can be prevented over a long period of time, and the trouble of replacing the wheel 3 can be saved.

また、左右各車輪3のホイール部13の内側面に、車輪軸心Lを中心とする円周上に複数の孔部又は凹部から成る係止雌部5が形成され、車台2側に、水平方向スライド自在に設けられて上記係止雌部5に先端の係止雄部6が係合する左右一対のシャフト7,7と、上記係止雄部6が上記係止雌部5に係合する方向に上記各シャフト7を弾発付勢する弾発部材8とを、備え、さらに、上記弾発部材8の弾発付勢力Fに抗して左右一対の上記シャフト7,7を水平内方向にスライドさせるリリース操作手段9を、備えているので、係止雌部5と係止雄部6の係合によって、確実に車輪3の回転を阻止できる。車輪3のタイヤ部の摩耗や水分又は油汚れ等の付着による摩擦力の低下、及び、車輪3の破損を生じることがなく、長期の使用期間にわたって制動力を維持できる。左右各車輪3に対し、個別に制動力を作用させることができ、故障によって左右の内の片方の車輪3の制動が効かなくなった場合であっても、もう片方の車輪3の回転を確実に阻止でき、安全性を向上できる。製造が容易で、コストを低減できる。 Further, on the inner surface of the wheel portion 13 of the left and right wheels 3, Kakaritomemesu portion 5 including a plurality of holes or recesses are formed on a circumference around the wheel axis L 0, the chassis 2 side, A pair of left and right shafts 7 and 7 that are provided so as to be slidable in the horizontal direction and engage with the engaging female portion 5 at the front end thereof, and the engaging male portion 6 engage with the engaging female portion 5. And a resilient member 8 for resiliently urging the shafts 7 in the direction, and further moving the pair of left and right shafts 7 and 7 horizontally inward against the resilient urging force F of the resilient member 8 Since the release operation means 9 is provided to slide the wheel 3, the engagement of the locking female part 5 and the locking male part 6 can reliably prevent the rotation of the wheel 3. The braking force can be maintained over a long period of use without causing a decrease in frictional force due to wear of the tire portion of the wheel 3 or adhesion of moisture or oil stains, and damage to the wheel 3. A braking force can be applied individually to each of the left and right wheels 3, and even if the braking of one of the left and right wheels 3 becomes ineffective due to a failure, the other wheel 3 is reliably rotated. It can be prevented and safety can be improved. Manufacturing is easy and cost can be reduced.

また、上記リリース操作手段9は、左右一対の上記シャフト7,7の端部に設けたカムローラ14,14を昇降に伴って相互に接近・離反させるテーパー状カム面15,15が形成された昇降部材16と、上記カムローラ14,14が相互に離反する方向に上記昇降部材16を弾発付勢する弾発部材17と、上記カムローラ14,14が相互に接近する方向に上記昇降部材16に引張力Tを作用させる可撓性引張ワイヤ18と、該可撓性引張ワイヤ18に連動連結される手動操作部12とを、備えているので、左右各車輪3に対し、個別に制動力を作用させることができ、車輪3を確実に固定保持することができる。構造が簡素で、軽量化することができ、かつ、製造コストを低減できる。車輪ロック状態・車輪ロック解除状態を切換えるための機構を、可撓性引張ワイヤ18と手動操作部12を除いて、車台2の下面側で、かつ、車輪3,3の内側に配設することができ、外側から見えないので見栄えが良く、しかも、障害物との衝突による故障を防止できる。   Further, the release operating means 9 is a lifting / lowering formed with tapered cam surfaces 15 and 15 for moving the cam rollers 14 and 14 provided at the ends of the pair of left and right shafts 7 and 7 toward and away from each other as the lifting and lowering. A member 16, a resilient member 17 that resiliently biases the lifting member 16 in a direction in which the cam rollers 14, 14 are separated from each other, and a pulling member 16 in the direction in which the cam rollers 14, 14 approach each other Since the flexible tension wire 18 for applying the force T and the manual operation unit 12 linked to the flexible tension wire 18 are provided, the braking force is individually applied to the left and right wheels 3. The wheel 3 can be securely fixed and held. The structure is simple, the weight can be reduced, and the manufacturing cost can be reduced. A mechanism for switching between the wheel lock state and the wheel lock release state is disposed on the lower surface side of the chassis 2 and inside the wheels 3 and 3 except for the flexible pull wire 18 and the manual operation unit 12. It can be seen from the outside, so it looks good, and it is possible to prevent failure due to collision with an obstacle.

また、上記手動操作部12は、手押し台車10の折畳み自在のハンドル11の上端部11a近傍に設けられているので、車輪ロック状態と車輪ロック解除状態の切換え操作を、手元で行うことができ、使い勝手を向上できる。また、可撓性引張ワイヤ18と、これに繋がる手動操作部12を、ハンドル11と共に折畳むことができる。   In addition, since the manual operation unit 12 is provided in the vicinity of the upper end portion 11a of the foldable handle 11 of the hand cart 10, the switching operation between the wheel lock state and the wheel lock release state can be performed at hand. Usability can be improved. Further, the flexible pull wire 18 and the manual operation unit 12 connected thereto can be folded together with the handle 11.

2 車台
3 車輪
4 ディスク
5 係止雌部
6 係止雄部
7 シャフト
8 弾発部材
9 リリース操作手段
10 手押し台車
11 ハンドル
11a 上端部
12 手動操作部
13 ホイール部
14 カムローラ
15 テーパー状カム面
16 昇降部材
17 弾発部材
18 可撓性引張ワイヤ
車輪軸心
F 弾発付勢力
T 引張力
2 chassis 3 wheels 4 disc 5 locking female part 6 locking male part 7 shaft 8 impact member 9 release operation means 10 handcart 11 handle 11a upper end part 12 manual operation part 13 wheel part 14 cam roller 15 tapered cam surface 16 lifting member 17 Elastic member 18 Flexible tensile wire L 0 Wheel shaft center F Elastic urging force T Tensile force

Claims (3)

車輪軸心(L)を中心とする円周上に複数の孔部又は凹部から成る係止雌部(5)を有するディスク(4)が、左右各車輪(3)の内側部に固設され、
車台(2)側に、水平方向スライド自在に設けられて上記係止雌部(5)に先端の係止雄部(6)が係合する左右一対のシャフト(7)(7)と、上記係止雄部(6)が上記係止雌部(5)に係合する方向に上記各シャフト(7)を弾発付勢する弾発部材(8)とを、備え、
さらに、上記弾発部材(8)の弾発付勢力(F)に抗して左右一対の上記シャフト(7)(7)を水平内方向にスライドさせるリリース操作手段(9)を、備え
上記リリース操作手段(9)は、左右一対の上記シャフト(7)(7)の端部に設けたカムローラ(14)(14)を昇降に伴って相互に接近・離反させるテーパー状カム面(15)(15)が形成された昇降部材(16)と、上記カムローラ(14)(14)が相互に離反する方向に上記昇降部材(16)を弾発付勢する弾発部材(17)と、上記カムローラ(14)(14)が相互に接近する方向に上記昇降部材(16)に引張力(T)を作用させる可撓性引張ワイヤ(18)と、該可撓性引張ワイヤ(18)に連動連結される手動操作部(12)とを、備えていることを特徴とする車輪用ストッパ構造。
A disk (4) having a locking female part (5) consisting of a plurality of holes or recesses on the circumference centered on the wheel axis (L 0 ) is fixed to the inner part of each of the left and right wheels (3). And
A pair of left and right shafts (7) (7) provided on the chassis (2) side so as to be slidable in the horizontal direction and engaging with the locking male portion (6) at the tip of the locking female portion (5); A resilient member (8) for resiliently biasing each shaft (7) in a direction in which the stationary male part (6) engages with the locking female part (5);
And a release operation means (9) that slides the pair of left and right shafts (7) and (7) in a horizontal inward direction against the elastic urging force (F) of the elastic member (8) ,
The release operation means (9) is a tapered cam surface (15) that causes the cam rollers (14) (14) provided at the ends of the pair of left and right shafts (7) and (7) to approach and separate from each other as they move up and down. ) (15) formed lifting member (16), and the cam roller (14) (14) is a resilient member (17) for resiliently urging the lifting member (16) in a direction away from each other, A flexible tension wire (18) that applies a tensile force (T) to the elevating member (16) in a direction in which the cam rollers (14) and (14) approach each other, and the flexible tension wire (18). A wheel stopper structure characterized by comprising a manual operation section (12) that is linked and connected .
左右各車輪(3)のホイール部(13)の内側面に、車輪軸心(L)を中心とする円周上に複数の孔部又は凹部から成る係止雌部(5)が形成され、
車台(2)側に、水平方向スライド自在に設けられて上記係止雌部(5)に先端の係止雄部(6)が係合する左右一対のシャフト(7)(7)と、上記係止雄部(6)が上記係止雌部(5)に係合する方向に上記各シャフト(7)を弾発付勢する弾発部材(8)とを、備え、
さらに、上記弾発部材(8)の弾発付勢力(F)に抗して左右一対の上記シャフト(7)(7)を水平内方向にスライドさせるリリース操作手段(9)を、備え
上記リリース操作手段(9)は、左右一対の上記シャフト(7)(7)の端部に設けたカムローラ(14)(14)を昇降に伴って相互に接近・離反させるテーパー状カム面(15)(15)が形成された昇降部材(16)と、上記カムローラ(14)(14)が相互に離反する方向に上記昇降部材(16)を弾発付勢する弾発部材(17)と、上記カムローラ(14)(14)が相互に接近する方向に上記昇降部材(16)に引張力(T)を作用させる可撓性引張ワイヤ(18)と、該可撓性引張ワイヤ(18)に連動連結される手動操作部(12)とを、備えていることを特徴とする車輪用ストッパ構造。
On the inner surface of the wheel portion (13) of each of the left and right wheels (3), a locking female portion (5) composed of a plurality of holes or recesses is formed on the circumference centered on the wheel axis (L 0 ). ,
A pair of left and right shafts (7) (7) provided on the chassis (2) side so as to be slidable in the horizontal direction and engaging with the locking male portion (6) at the tip of the locking female portion (5); A resilient member (8) for resiliently biasing each shaft (7) in a direction in which the stationary male part (6) engages with the locking female part (5);
And a release operation means (9) that slides the pair of left and right shafts (7) and (7) in a horizontal inward direction against the elastic urging force (F) of the elastic member (8) ,
The release operation means (9) is a tapered cam surface (15) that causes the cam rollers (14) (14) provided at the ends of the pair of left and right shafts (7) and (7) to approach and separate from each other as they move up and down. ) (15) formed lifting member (16), and the cam roller (14) (14) is a resilient member (17) for resiliently urging the lifting member (16) in a direction away from each other, A flexible tension wire (18) that applies a tensile force (T) to the elevating member (16) in a direction in which the cam rollers (14) and (14) approach each other, and the flexible tension wire (18). A wheel stopper structure characterized by comprising a manual operation section (12) that is linked and connected .
上記手動操作部(12)は、手押し台車(10)の折畳み自在のハンドル(11)の上端部(11a)近傍に設けられている請求項1又は2記載の車輪用ストッパ構造。 The wheel stopper structure according to claim 1 or 2, wherein the manual operation portion (12) is provided in the vicinity of an upper end portion (11a) of a foldable handle (11) of the hand cart (10) .
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