JP3196047U - Wheel fixing mechanism for walking cars - Google Patents

Wheel fixing mechanism for walking cars Download PDF

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JP3196047U
JP3196047U JP2014006375U JP2014006375U JP3196047U JP 3196047 U JP3196047 U JP 3196047U JP 2014006375 U JP2014006375 U JP 2014006375U JP 2014006375 U JP2014006375 U JP 2014006375U JP 3196047 U JP3196047 U JP 3196047U
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pin
support member
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wheel
locking pin
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善弘 長竹
善弘 長竹
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ユーバ産業株式会社
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Abstract

【課題】前部枠体の下端部に対して水平旋回可能に取り付けた前部車輪を、車本体の前後方向と一致する方向に向けた状態に確実に固定することができる歩行車の車輪固定機構を提供する。【解決手段】前部車輪３ａを、支持部材８，９を介して前部枠体３の下端部に取り付け、後部車輪を、後部枠体の下端部に取り付けた歩行車において、車輪固定機構１１の操作レバー１４を回転固定方向Ｌへ回動操作し、上部支持部材９のピン収容部９３に収容した係止ピン１２をピン突出孔９３ｂより下方に突出して、ピン突出孔９３ｂと対向する位置に回転移動した下部支持部材８の係止孔８３に係合する。これにより、支持部材８，９同士が相対回転不可に回転固定されるため、前部枠体３の下端部に対して水平旋回可能に取り付けた前部車輪３ａを、歩行車の前後方向Ｘと一致する方向に向けた状態に回転固定することができる。【選択図】図６[PROBLEMS] To fix a wheel of a walking vehicle capable of reliably fixing a front wheel attached to a lower end portion of a front frame so as to be horizontally turnable in a direction coinciding with a longitudinal direction of a vehicle body. Provide mechanism. In a walking vehicle in which a front wheel (3a) is attached to a lower end portion of a front frame body (3) via support members (8, 9) and a rear wheel is attached to a lower end portion of the rear frame body, a wheel fixing mechanism (11) is provided. The operation lever 14 is rotated in the rotation fixing direction L, and the locking pin 12 accommodated in the pin accommodating portion 93 of the upper support member 9 projects downward from the pin projecting hole 93b and faces the pin projecting hole 93b. Is engaged with the locking hole 83 of the lower support member 8 that has been rotated and moved. Accordingly, since the support members 8 and 9 are rotationally fixed so as not to rotate relative to each other, the front wheel 3a attached to the lower end portion of the front frame 3 so as to be able to turn horizontally is set to the front-rear direction X of the walking vehicle. It can be rotationally fixed in a state in which the directions are coincident. [Selection] Figure 6

Description

この考案は、例えば、歩行困難な身障者や老人の歩行訓練、機能回復、買い物、散歩等に用いられシルバーカーや老人車、或いは、ベビーカーやショッピングカー、荷物運搬用台車、車椅子等に用いられる歩行車の車輪固定機構に関する。   This device is used, for example, for walking training for disabled people and elderly people who have difficulty walking, functional recovery, shopping, walking, etc. The present invention relates to a vehicle wheel fixing mechanism.

従来、上述の身障者や老人等の利用者が歩行する際に使用する手押し操作式の歩行車は、前部車輪を、車本体における左右の前部枠体の下端部に対して水平旋回可能（あるいは首振り自在）に取り付けているため、歩行車を、利用者の手で所望する走行方向に向けて走行移動させることができるが、歩行車の走行移動中において、前部車輪の向いている方向を確認することが難しく、前部車輪の向きを確認せずに手押し操作すると、歩行車が予期せぬ方向に進みやすいため、利用者が転倒するおそれがある。   Conventionally, a hand-operated walking vehicle used when a user such as a disabled person or an elderly person walks as described above can turn the front wheel horizontally with respect to the lower ends of the left and right front frame bodies in the vehicle body ( Since the walking vehicle can be moved and moved in the direction of travel desired by the user's hand, the front wheels are facing during the traveling movement of the walking vehicle. It is difficult to confirm the direction, and if the push-and-push operation is performed without confirming the direction of the front wheels, the user may fall down because the walking car tends to advance in an unexpected direction.

そこで、歩行車の直進性を確保するため、前部車輪を歩行車の前後方向と一致する向きに旋回固定する機構を備えた手押し式の歩行車が既に提案されている（特許文献１参照）。この歩行車は、前輪が軸受されたキャスターを、前パイプの下端部に対して水平旋回可能に取り付けているため、前パイプの下端部に装着したストッパー部材を、キャスターの前方に突設した凸部に被せることにより、前輪を歩行車の前後方向と一致する向きに旋回固定することができる。   Therefore, in order to ensure the straightness of the walking vehicle, a hand-held walking vehicle having a mechanism for turning and fixing the front wheels in a direction coinciding with the front-rear direction of the walking vehicle has already been proposed (see Patent Document 1). . In this walking vehicle, the caster with the front wheel bearing is attached to the lower end of the front pipe so that it can be turned horizontally, so that a stopper member mounted on the lower end of the front pipe is projected on the front of the caster. By covering the part, the front wheel can be turned and fixed in a direction coinciding with the front-rear direction of the walking vehicle.

しかし、歩行車を所望する方向へ走行移動させる際の移動力によって、前パイプを中心として、キャスターの前方に突設した凸部が大きく旋回移動しようとするため、ストッパー部材と凸部との係合部分に付与される応力が大きい。そのうえ、ストッパー部材と凸部との係合部分が外部に露出しているため、ストッパー部材が凸部から外れやすく、前輪を、歩行車の前後方向と一致する向きに回転固定した状態に保つことが困難である。   However, since the convex portion protruding in front of the caster tends to pivot about the front pipe due to the moving force when the pedestrian travels in the desired direction, the relationship between the stopper member and the convex portion is large. The stress applied to the joint part is large. In addition, since the engaging portion between the stopper member and the convex portion is exposed to the outside, the stopper member is easily detached from the convex portion, and the front wheel is kept rotationally fixed in a direction that matches the front-rear direction of the walking vehicle. Is difficult.

特開平１１−１０４１９５号公報Japanese Patent Laid-Open No. 11-104195

この考案は、前部枠体の下端部に対して水平旋回可能に取り付けた前部車輪を、車本体の前後方向と一致する方向に向けた状態に確実に固定することができる歩行車の車輪固定機構を提供することを目的とする。   This device is a wheel of a walking vehicle that can securely fix the front wheel attached to the lower end of the front frame so as to be able to turn horizontally in a direction that coincides with the longitudinal direction of the vehicle body. An object is to provide a fixing mechanism.

この考案は、前部車輪を、車輪支持部を介して車本体における前部枠体の下端部に対してフリー回転可能に取り付け、後部車輪を、後部枠体の下端部に対してフリー回転可能に取り付けた歩行車において、前記車輪支持部を、前記前部枠体の下端部に固定した上部支持部材と、前記前部車輪を下端部に軸受した下部支持部材と、該支持部材同士を水平旋回可能に連結する垂直軸と、該下部支持部材に軸受した前部車輪を前記車本体の前後方向と一致する方向に向けた状態に回転固定する車輪固定機構とで構成し、前記車輪固定機構を、前記上部支持部材に形成したピン収容部に対して上下動可能に収容した係止ピンと、前記ピン収容部の下端部に形成した前記係止ピンの下端部の突出を許容するピン突出孔と、前記係止ピンの下端部が前記ピン突出孔より下方に突出される方向に該係止ピンを付勢するピン付勢手段と、前記下部支持部材における前記ピン突出孔と対向する部分に形成した前記係止ピンの下端部の係合を許容する係止孔と、前記ピン収容部より上方に突出した前記係止ピンの上端部に対して上下回動可能に連結され、前記係止ピンの下端部が前記係止孔から抜き取られる固定解除方向に回動操作される操作レバーとで構成した歩行車の車輪固定機構であることを特徴とする。   This device attaches the front wheel to the lower end portion of the front frame body in the vehicle body via the wheel support portion so as to be freely rotatable, and allows the rear wheel to freely rotate with respect to the lower end portion of the rear frame body. In the pedestrian attached to the vehicle, the upper support member that fixes the wheel support portion to the lower end portion of the front frame, the lower support member that supports the front wheel at the lower end portion, and the support members horizontally The wheel fixing mechanism includes a vertical shaft that is pivotably connected, and a wheel fixing mechanism that rotates and fixes a front wheel bearing on the lower support member in a state in which the front wheel is oriented in a direction that coincides with the longitudinal direction of the vehicle body. And a pin projecting hole for allowing the lower end portion of the locking pin formed at the lower end portion of the pin accommodating portion to project. And the lower end of the locking pin is Pin urging means for urging the locking pin in a direction protruding downward from the protruding hole, and engagement of a lower end portion of the locking pin formed in a portion of the lower support member facing the pin protruding hole Is connected to the upper end portion of the locking pin protruding upward from the pin accommodating portion, and the lower end portion of the locking pin is extracted from the locking hole. It is a wheel fixing mechanism of a walking vehicle constituted by an operation lever that is rotated in a fixing release direction.

この考案によれば、前部枠体の下端部に対して水平旋回可能に取り付けた前部車輪を、車本体の前後方向と一致する方向に向けた状態に確実に固定することができる。
詳述すると、操作レバーを、係止ピンに連結した部分を中心として固定解除方向へ回動操作するとともに、該係止ピンをピン付勢手段に抗して上方へ引き上げ、係止ピンの下端部を、下部支持部材の係止孔から抜き取り、係止孔に対する係止ピンの係合を解除する。 According to this device, the front wheel attached to the lower end of the front frame so as to be able to turn horizontally can be reliably fixed in a state in which the front wheel is directed in a direction coinciding with the front-rear direction of the vehicle body.
More specifically, the operating lever is operated to rotate in the unlocking direction around the portion connected to the locking pin, and the locking pin is lifted upward against the pin urging means, and the lower end of the locking pin. The part is extracted from the locking hole of the lower support member, and the engagement of the locking pin with the locking hole is released.

これにより、下部支持部材と上部支持部材の回転固定が解除され、相対回転が可能となるため、前部車輪が軸受された下部支持部材を、上部支持部材に軸支された垂直軸を中心として所望する方向へ水平旋回することができる。   As a result, the rotation and fixation of the lower support member and the upper support member are released, and relative rotation is possible. Therefore, the lower support member on which the front wheels are supported is centered on the vertical axis that is pivotally supported by the upper support member. It is possible to turn horizontally in a desired direction.

この結果、歩行車の走行方向に応じて、前部枠体の下端部に対して水平旋回可能に取り付けた前部車輪が水平旋回するため、歩行車を、利用者の手で所望する走行方向に向けて走行移動させることができる。   As a result, since the front wheels attached to the lower end of the front frame so as to be able to turn horizontally turn horizontally according to the running direction of the walking car, the walking direction in which the walking car is desired by the user's hand The vehicle can be moved toward.

次に、歩行車の直進性を確保する場合、操作レバーを、係止ピンに連結した部分を中心として固定解除方向と反対の方向（例えば回転固定方向）へ回動操作するととともに、コイルスプリングの付勢力によって係止ピンを下方へ押し下げる。   Next, in order to ensure the straightness of the walking vehicle, the operation lever is rotated in the direction opposite to the fixing release direction (for example, the rotation fixing direction) around the portion connected to the locking pin, and the coil spring The locking pin is pushed downward by the urging force.

このとき、ピン収容部におけるピン突出孔の直下に、下部支持部材における係止孔が待機していれば、係止ピンの下端部が、下部支持部材の係止孔に対して係合されるため、下部支持部材と上部支持部材を相対回転不可に回転固定することができる。   At this time, if the locking hole in the lower support member is waiting immediately below the pin protruding hole in the pin accommodating portion, the lower end portion of the locking pin is engaged with the locking hole in the lower support member. Therefore, it is possible to rotate and fix the lower support member and the upper support member so that they cannot be rotated relative to each other.

また、下部支持部材の係止孔が、ピン収容部のピン突出孔との対向が回避される位置へ移動している場合、前部車輪が軸受された下部支持部材を、垂直軸を中心として所望する方向へ水平旋回させ、下部支持部材の係止孔を、上部支持部材のピン突出孔と対向する位置に回転移動させることにより、係止ピンの下端部が、下部支持部材の係止孔に対して係合される。   In addition, when the locking hole of the lower support member has moved to a position where the counter hole with the pin protruding hole of the pin housing portion is avoided, the lower support member on which the front wheel is supported is centered on the vertical axis. By horizontally turning in the desired direction and rotating the locking hole of the lower support member to a position facing the pin protruding hole of the upper support member, the lower end portion of the locking pin becomes the locking hole of the lower support member. Is engaged.

これにより、前部枠体の下端部に対して水平旋回可能に取り付けた前部車輪を、歩行車の前後方向と一致する方向に向けた状態に回転固定することができる。
この結果、歩行車の走行方向と、前部枠体の下端部に取り付けた前部車輪の回転方向とが一致するため、歩行車の手押し操作中において、歩行車が予期せぬ方向に走行移動することを防止することができ、歩行車の直進性が向上する。 Thereby, the front wheel attached so that horizontal turning is possible with respect to the lower end part of a front part frame body can be rotationally fixed in the state orient | assigned to the direction which corresponds with the front-back direction of a walking vehicle.
As a result, the traveling direction of the walking vehicle and the rotational direction of the front wheel attached to the lower end of the front frame body coincide with each other, so the walking vehicle travels in an unexpected direction during the pushing operation of the walking vehicle. Can be prevented, and the straightness of the walking vehicle is improved.

しかも、係止ピンを、ピン付勢手段の付勢力によって係止孔に対して係合される方向に付勢しているため、互いに係合した状態において、係止ピンが係止孔から引き抜かれることを防止することができる。
これにより、前部枠体の下端部に対して水平旋回可能に取り付けた前部車輪を、歩行車の前後方向と一致する方向に向けた状態に保つことができる。 In addition, since the locking pins are urged in the direction to be engaged with the locking holes by the urging force of the pin urging means, the locking pins are pulled out from the locking holes in the engaged state. Can be prevented.
Thereby, the front wheel attached so that horizontal turning with respect to the lower end part of a front part frame body can be kept in the state orient | assigned to the direction which corresponds with the front-back direction of a walking vehicle.

この考案の態様として、前記下部支持部材を、前記上部支持部材より下方に突出した前記垂直軸の下端部に対して水平旋回可能に取り付けた上部軸受部と、該上部軸受部に形成した側面から見て斜め下方に延びるとともに、前記前部車輪を軸受する下部軸受部とで構成することができる。   As an aspect of the present invention, the lower support member is mounted on the lower bearing of the vertical shaft protruding downward from the upper support member so as to be horizontally pivotable, and from a side surface formed on the upper bearing portion. It extends obliquely downward as viewed and can be constituted by a lower bearing portion that bears the front wheel.

この考案によれば、前部枠体の下端部に対して水平旋回可能に取り付けた前部車輪を、歩行車の前後方向と一致する方向に向けた状態により確実に固定することができる。   According to this device, the front wheel attached to the lower end portion of the front frame so as to be able to turn horizontally can be reliably fixed in a state in which the front wheel is directed in a direction coinciding with the front-rear direction of the walking vehicle.

詳述すると、操作レバーを固定解除方向と反対の方向（例えば回転固定方向）へ回動操作して、下部支持部材と上部支持部材の回転固定を解除した状態において、下部支持部材が所望する方向へ水平旋回すると、下部支持部材の係止孔が、ピン収容部のピン突出孔との対向が回避される位置へ回転移動するため、ピン突出孔より突出した係止ピンの下端部は、ピン付勢手段によって下部支持部材の上面側周縁部に対して当接した状態に付勢される。   More specifically, the lower support member in a desired direction in a state where the operation lever is rotated in the opposite direction to the fixing release direction (for example, the rotation fixing direction) to release the rotation fixing of the lower support member and the upper support member. Since the locking hole of the lower support member rotates and moves to a position where it is opposed to the pin protruding hole of the pin accommodating portion, the lower end portion of the locking pin protruding from the pin protruding hole is It is urged by the urging means so as to be in contact with the upper peripheral edge of the lower support member.

しかし、下部支持部材の下部軸受部を、上部軸受部に対して側面から見て斜め下方に延びる形状に形成しているため、歩行車を所望する方向へ走行移動させる際の移動力を利用して、下部支持部材における前部車輪が軸受された下部軸受部を、歩行車の走行方向と反対の方向へ水平旋回させることができる。   However, since the lower bearing portion of the lower support member is formed in a shape that extends obliquely downward as viewed from the side with respect to the upper bearing portion, it uses the moving force when moving the walking vehicle in a desired direction. Thus, the lower bearing portion in which the front wheels of the lower support member are bearing can be horizontally turned in a direction opposite to the traveling direction of the walking vehicle.

すなわち、下部支持部材の係止孔を、上部支持部材のピン突出孔と対向する位置に回転移動させて、係止ピンの下端部を、下部支持部材の係止孔に対して係合するため、前部枠体の下端部に対して水平旋回可能に取り付けた前部車輪を、歩行車の前後方向と一致する方向に向けた状態に回転固定することができる。   That is, in order to engage the lower end portion of the locking pin with the locking hole of the lower support member by rotating the locking hole of the lower support member to a position facing the pin protruding hole of the upper support member. The front wheels attached to the lower end of the front frame so as to be horizontally turnable can be rotationally fixed in a state in which the front wheels are directed in a direction that coincides with the front-rear direction of the walking vehicle.

この結果、下部支持部材を、利用者の手で水平旋回させるような手間及び作業が省け、下部支持部材の係止孔を、上部支持部材のピン突出孔と対向する位置に回転移動させる作業が容易に行える。   As a result, the labor and work of horizontally turning the lower support member by the user's hand can be saved, and the work of rotating the locking hole of the lower support member to a position facing the pin protruding hole of the upper support member can be performed. Easy to do.

またこの考案の態様として、前記係止ピンを収容した前記ピン収容部、及び前記係止ピンを突出する前記ピン突出孔を、前記車本体の後方側と対応して前記上部支持部材における前記垂直軸の後側に設け、前記係止ピンの下端部を係合する前記係止孔を、前記下部支持部材における前記下部軸受部と対応して、前記上部軸受部における前記ピン突出孔と対向する上部周縁部に設けることができる。   According to another aspect of the present invention, the pin accommodating portion that accommodates the locking pin, and the pin protruding hole that projects the locking pin correspond to the rear side of the vehicle body, and The locking hole that is provided on the rear side of the shaft and engages the lower end portion of the locking pin is opposed to the pin protruding hole in the upper bearing portion, corresponding to the lower bearing portion in the lower support member. It can be provided at the upper peripheral edge.

この考案によれば、前部枠体の下端部に対して水平旋回可能に取り付けた前部車輪を、歩行車の前後方向と一致する方向に向けた状態に正確かつ確実に固定することができる。
詳述すると、前部車輪が軸受された下部支持部材を、上部支持部材に軸支された垂直軸を中心として水平旋回させ、下部支持部材の下部軸受部を、車本体の後方側と対応して垂直軸の後側へ回転移動させることにより、上部軸受部の係止孔を、上部支持部材における垂直軸の後側に設けたピン突出孔と対向する位置に回転移動させることができる。 According to this device, the front wheel attached to the lower end portion of the front frame so as to be able to turn horizontally can be accurately and reliably fixed in a state in which the front wheel is directed in a direction coinciding with the front-rear direction of the walking vehicle. .
Specifically, the lower support member bearing the front wheel is horizontally swiveled around the vertical axis supported by the upper support member, and the lower bearing portion of the lower support member corresponds to the rear side of the vehicle body. Thus, by rotating and moving to the rear side of the vertical shaft, the locking hole of the upper bearing portion can be rotated and moved to a position facing the pin protrusion hole provided on the rear side of the vertical shaft in the upper support member.

これにより、ピン突出孔より突出する係止ピンの下端部が、下部支持部材における上部軸受部の係止孔に対して確実に係合されるため、前部枠体の下端部に対して水平旋回可能に取り付けた前部車輪を、歩行車の前後方向と一致する方向に向けた状態に正確かつ確実に固定することができ、歩行車の直進性がより向上する。   As a result, the lower end portion of the locking pin protruding from the pin protruding hole is securely engaged with the locking hole of the upper bearing portion in the lower support member, so that it is horizontal with respect to the lower end portion of the front frame. The front wheel attached so as to be able to turn can be accurately and reliably fixed in a state in which the front wheel is directed in a direction coinciding with the front-rear direction of the walking vehicle, and the straightness of the walking vehicle is further improved.

またこの考案の態様として、前記ピン収容部の上端側開口部に、該上端側開口部を覆う大きさ及び形状に形成した抜止め部材を固定し、前記抜止め部材に、前記係止ピンの上端部の突出を許容するピン挿通孔を形成し、前記操作レバーの基端部を、前記ピン挿通孔より上方に突出した前記係止ピンの上端部に連結し、前記操作レバーの基端部に、前記抜止め部材の上面側平坦部分に対して当接されるカム部を形成することができる。   Further, as an aspect of the present invention, a retaining member formed in a size and shape that covers the upper end side opening is fixed to the upper end side opening of the pin accommodating portion, and the retaining pin is fixed to the retaining member. A pin insertion hole that allows the upper end portion to protrude is formed, and the base end portion of the operation lever is connected to the upper end portion of the locking pin protruding upward from the pin insertion hole, and the base end portion of the operation lever In addition, a cam portion that abuts against the flat portion on the upper surface side of the retaining member can be formed.

この考案によれば、操作レバーの回動操作により、下部支持部材と上部支持部材の回転固定をより確実に解除することができる。
詳述すると、操作レバーを固定解除方向へ回動操作する際に、操作レバーのカム部を抜止め部材の上面側平坦部分に当接するとともに、その当接した部分を支点として、操作レバーを固定解除方向へ回動操作するため、例えば、テコの原理により、操作レバーに連結した係止ピンをピン付勢手段に抗して容易に上方へ引き上げることができる。 According to this device, the rotational support of the lower support member and the upper support member can be more reliably released by rotating the operation lever.
More specifically, when the operation lever is rotated in the unlocking direction, the cam portion of the operation lever is brought into contact with the flat portion on the upper surface side of the retaining member, and the operation lever is fixed using the contacted portion as a fulcrum. Since the pivoting operation is performed in the release direction, for example, the locking pin connected to the operation lever can be easily pulled up against the pin urging means by the lever principle.

この結果、係止ピンの下端部を、下部支持部材の係止孔から確実に抜き取ることができるため、下部支持部材と上部支持部材の回転固定を確実かつ容易に解除することができる。   As a result, since the lower end portion of the locking pin can be reliably extracted from the locking hole of the lower support member, the rotation and fixing of the lower support member and the upper support member can be reliably and easily released.

またこの考案の態様として、前記カム部を、前記操作レバーを倒伏姿勢に回動した状態において、前記抜止め部材の上面側平坦部分に対して平坦部分を垂直に当接する水平カム部と、前記操作レバーを起立姿勢に回動した状態において、前記抜止め部材の上面側平坦部分に対して平坦部分を垂直に当接する起立カム部と、前記水平カム部と前記起立カム部とが成す角隅部に該カム部と連続して形成され、前記操作レバーを倒伏姿勢と起立姿勢に回動操作する際に、前記抜止め部材の上面側平坦部分に対して曲面部分を当接する支点カム部とで構成することができる。   Further, as an aspect of the present invention, in the state where the cam portion is rotated in the lying posture, the horizontal cam portion that vertically contacts the flat portion with respect to the flat portion on the upper surface side of the retaining member, In a state in which the operation lever is rotated to the upright posture, an upright cam portion that abuts the flat portion vertically with respect to the flat portion on the upper surface side of the retaining member, and a corner formed by the horizontal cam portion and the upright cam portion. A fulcrum cam portion that is formed continuously with the cam portion and abuts the curved portion against the flat portion on the upper surface side of the retaining member when the operation lever is rotated to a lying posture and a standing posture. Can be configured.

この考案によれば、支持部材同士の回転固定が解除された固定解除状態、および、該支持部材同士が相対回転不可に回転固定された回転固定状態を確実に保つことができる。
詳述すると、操作レバーを起立姿勢に回動操作して、カム部における起立カム部の平坦部分を、抜止め部材の上面側平坦部分に対して垂直に当接することにより、操作レバーを垂直に起立した起立姿勢に回動規制することができる。
これにより、操作レバーが倒伏姿勢に回動することを防止でき、下部支持部材と上部支持部材との回転固定が解除された固定解除状態を確実に保つことができる。 According to this device, it is possible to reliably maintain the unlocked state in which the rotation and fixing of the support members are released and the rotation and fixed state in which the support members are rotated and fixed so as not to rotate relative to each other.
More specifically, the operating lever is turned to the upright posture, and the flat portion of the standing cam portion of the cam portion is brought into perpendicular contact with the flat portion on the upper surface side of the retaining member, thereby vertically moving the operating lever. The rotation can be restricted to the standing posture.
Thereby, it is possible to prevent the operation lever from rotating to the lying posture, and it is possible to reliably maintain the unlocked state in which the rotational support between the lower support member and the upper support member is released.

また、操作レバーを倒伏姿勢に回動操作して、水平カム部の平坦部分を、抜止め部材の上面側平坦部分に対して垂直に当接することにより、操作レバーを水平に倒伏した倒伏姿勢に回動規制することができる。
これにより、操作レバーが起立姿勢に回動することを防止でき、下部支持部材と上部支持部材とが相対回転不可に回転固定された回転固定状態を確実に保つことができる。 In addition, by rotating the operating lever to the lying position, the flat part of the horizontal cam part is brought into perpendicular contact with the flat part on the upper surface side of the retaining member, so that the operating lever is placed in the lying position. The rotation can be restricted.
Thereby, it is possible to prevent the operation lever from rotating to the standing posture, and it is possible to reliably maintain the rotation fixing state in which the lower support member and the upper support member are fixed so as not to rotate relative to each other.

また、操作レバーを倒伏姿勢と起立姿勢に回動操作する際に、支点カム部の曲面部分を、抜止め部材の上面側平坦部分に対して当接しながら回動するため、テコの原理により、係止ピンの下端部を、下部支持部材の係止孔から容易に抜き取る操作、あるいは、係止ピンの下端部を、下部支持部材の係止孔に係合する操作が容易に行える。   Further, when the operation lever is rotated to the lying posture and the standing posture, the curved portion of the fulcrum cam portion is rotated while abutting against the flat portion on the upper surface side of the retaining member. An operation of easily pulling out the lower end portion of the locking pin from the locking hole of the lower support member or an operation of engaging the lower end portion of the locking pin with the locking hole of the lower support member can be easily performed.

またこの考案の態様として、前記操作レバーの遊端側に、該操作レバーを回動操作する操作部を形成するとともに、該操作部を、前記垂直軸の上端部に螺合した戻止めナット、あるいは、該戻止めナットに装着したナットキャップの外面を覆う大きさ及び形状に形成することができる。   Further, as an aspect of the present invention, a detent nut is formed on the free end side of the operation lever, the operation portion for rotating the operation lever, and the operation portion screwed to the upper end portion of the vertical shaft, Or it can form in the magnitude | size and shape which cover the outer surface of the nut cap with which this detent | locking nut was mounted | worn.

詳述すると、操作レバーを倒伏姿勢に回動操作して、該操作レバーの操作部を、例えば、垂直軸の上端部に螺合した戻止めナット、あるいは、該戻止めナットに装着したナットキャップの外面を覆うように被せる。   More specifically, a detent nut in which the operation lever is rotated to a lying position and the operation portion of the operation lever is screwed to, for example, the upper end of the vertical shaft, or a nut cap attached to the detent nut Cover the outer surface of the cover.

これにより、倒伏姿勢の操作レバーに衝撃が付与されても、操作レバーに付与された衝撃が、戻止めナットあるいはナットキャップに伝えられるため、操作レバーに付与される衝撃を抑えることができ、耐久性を向上することができる。   As a result, even if an impact is applied to the operation lever in the lying position, the impact applied to the operation lever is transmitted to the detent nut or nut cap, so that the impact applied to the operation lever can be suppressed and durability Can be improved.

この考案によれば、前部枠体の下端部に対して水平旋回可能に取り付けた前部車輪を、車本体の前後方向と一致する方向に向けた状態に確実に固定することができる歩行車の車輪固定機構を提供することができる。   According to this device, the front wheel that is attached to the lower end of the front frame so as to be able to turn horizontally can be securely fixed in a state in which the front wheel is directed in a direction that coincides with the longitudinal direction of the vehicle body. The wheel fixing mechanism can be provided.

本実施形態の走行形態に変形した歩行車の右側面図。The right view of the walking vehicle deform | transformed into the driving | running | working form of this embodiment. 折畳み形態に変形した歩行車の右側面図。The right view of the walking vehicle deform | transformed into the folding form. 走行形態の歩行車を前方から見た正面図。The front view which looked at the walk vehicle of the traveling form from the front. 走行形態の歩行車を上方から見た平面図。The top view which looked at the walking vehicle of the traveling form from the upper direction. 車輪固定機構を分解した状態の説明図。Explanatory drawing of the state which decomposed | disassembled the wheel fixing mechanism. 車輪固定機構により前部車輪を回転固定した状態の断面図。Sectional drawing of the state which rotated and fixed the front wheel by the wheel fixing mechanism. 車輪固定機構による前部車輪の回転固定を解除した状態の断面図。Sectional drawing of the state which cancelled | released rotation fixation of the front wheel by a wheel fixing mechanism. 車輪支持部の上部支持部材を前後方向中央で分断した断面図。Sectional drawing which divided the upper support member of the wheel support part in the front-back direction center. 車輪支持部の上部支持部材を前方側に水平旋回した状態の断面図。Sectional drawing of the state which horizontally swung the upper support member of the wheel support part to the front side.

この考案の一実施形態を以下図面に基づいて詳述する。
図１は本実施形態の走行形態に変形した歩行車１の右側面図、図２は折畳み形態に変形した歩行車１の右側面図、図３は走行形態の歩行車１を前方から見た正面図、図４は走行形態の歩行車１を上方から見た平面図である。 An embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a right side view of a walking vehicle 1 transformed into a traveling form of the present embodiment, FIG. 2 is a right side view of the walking vehicle 1 transformed into a folded form, and FIG. 3 is a front view of the walking vehicle 1 in a traveling form. FIG. 4 is a front view of the walking vehicle 1 in a traveling form as viewed from above.

図５は車輪固定機構１１を分解した状態の説明図、図６は車輪固定機構１１により前部車輪３ａを回転固定した状態の断面図、図７は車輪固定機構１１による前部車輪３ａの回転固定を解除した状態の断面図、図８は図７に示す車輪支持部６の上部支持部材９を前後方向Ｘ中央で分断した断面図、図９は車輪支持部６の下部支持部材８を前方側Ｘａに水平旋回した状態の断面図である。   FIG. 5 is an explanatory diagram of a state in which the wheel fixing mechanism 11 is disassembled, FIG. 6 is a sectional view of the state in which the front wheel 3a is rotationally fixed by the wheel fixing mechanism 11, and FIG. FIG. 8 is a sectional view in which the upper support member 9 of the wheel support portion 6 shown in FIG. 7 is divided at the center in the front-rear direction X. FIG. 9 is a front view of the lower support member 8 of the wheel support portion 6. It is sectional drawing of the state rotated horizontally to the side Xa.

なお、車本体２の前後方向Ｘとは、手押し操作する車本体２の走行方向（進行方向）と一致する方向であり、車本体２の幅方向Ｗとは、前後方向Ｘに対して平面方向において直交する方向である。
また、車本体２における前部枠体３の側を前方側Ｘａとし、逆に、前部枠体３に対する後部枠体４の側を後方側Ｘｂとしている（図１〜図４参照）。
旋回方向Ａは、垂直軸１０を中心として水平に回転する方向であり、垂直方向Ｖは、垂直軸１０の長手方向と平行する方向である。 The longitudinal direction X of the vehicle body 2 is a direction that coincides with the traveling direction (traveling direction) of the vehicle body 2 to be manually pushed, and the width direction W of the vehicle body 2 is a plane direction with respect to the longitudinal direction X. It is a direction orthogonal in.
Moreover, the side of the front frame 3 in the vehicle body 2 is defined as the front side Xa, and conversely, the side of the rear frame 4 relative to the front frame 3 is defined as the rear side Xb (see FIGS. 1 to 4).
The turning direction A is a direction that rotates horizontally around the vertical axis 10, and the vertical direction V is a direction that is parallel to the longitudinal direction of the vertical axis 10.

本実施形態の歩行車１は、手押し操作される車本体２を、走行形態（図１参照）と折畳み形態（図２参照）とに変形自在に設けている。
車本体２は、該車本体２における前方側Ｘａに配置した前側斜め下方に延びる左右の前部枠体３と、後方側Ｘｂに配置した後側斜め下方に延びる左右の後部枠体４とにおける長手方向の中間部を互いに連結し、前後の枠体３，４における長手方向の上端部を互いに連結している（図１〜図４参照）。 The walking vehicle 1 of the present embodiment is provided with a car body 2 that is manually pushed so that it can be deformed into a traveling form (see FIG. 1) and a folded form (see FIG. 2).
The vehicle main body 2 includes a left and right front frame 3 extending diagonally downward on the front side disposed on the front side Xa of the vehicle main body 2 and a left and right rear frame 4 extending diagonally downward on the rear side disposed on the rear side Xb. The middle portions in the longitudinal direction are connected to each other, and the upper ends in the longitudinal direction of the front and rear frame bodies 3 and 4 are connected to each other (see FIGS. 1 to 4).

前部枠体３の下端部には、後述する水平旋回可能な構造を有する車輪支持部６を介して、大径の前部車輪３ａをフリー回転可能に軸受するとともに、歩行車１の走行方向に応じて水平旋回可能（あるいは首振り自在）に取り付けている。後部枠体４の下端部には、前部車輪３ａよりも小径の後部車輪４ａをフリー回転可能に軸受している（図１〜図４参照）。   At the lower end of the front frame 3, a large-diameter front wheel 3a is supported so as to be freely rotatable via a wheel support 6 having a horizontally turnable structure, which will be described later. It is attached so that it can be swiveled horizontally (or swung freely). A rear wheel 4a having a smaller diameter than the front wheel 3a is supported at the lower end of the rear frame 4 so as to be freely rotatable (see FIGS. 1 to 4).

車本体２における上端部には、前方側Ｘａに向けて張り出した形状を有する平面視略Ｕ字状のハンドル部５を取り付けている（図１〜図４参照）。
なお、車本体２における幅方向Ｗの内側には、着座用の座部を取り付けている。また、座部の下方に、図示しない柔軟性を有する収容袋を着脱可能に取り付けてもよい。 A substantially U-shaped handle portion 5 in plan view having a shape protruding toward the front side Xa is attached to the upper end portion of the vehicle body 2 (see FIGS. 1 to 4).
A seat for seating is attached to the inside of the vehicle body 2 in the width direction W. Moreover, you may attach the storage bag which has the softness | flexibility which is not shown in figure below the seat part so that attachment or detachment is possible.

車輪支持部６は、前部車輪３ａを下端部に軸受した下部支持部材８と、前部枠体３の下端部に固定した上部支持部材９と、該支持部材８，９同士を水平旋回可能に連結する垂直軸１０と、下部支持部材８に軸受した前部車輪３ａを車本体２の前後方向Ｘと一致する方向に向けた状態に回転固定する車輪固定機構１１とを備えている（図５、図６参照）。   The wheel support portion 6 has a lower support member 8 that supports the front wheel 3a at its lower end, an upper support member 9 that is fixed to the lower end of the front frame 3, and the support members 8 and 9 can turn horizontally. And a wheel fixing mechanism 11 for rotating and fixing the front wheel 3a bearing on the lower support member 8 in a state in which the front wheel 3a is directed in a direction coinciding with the longitudinal direction X of the vehicle body 2 (see FIG. 5, see FIG.

車輪固定機構１１は、上部支持部材９に形成したピン収容部９３に対して上下動可能に収容した係止ピン１２と、ピン収容部９３の下端部に形成した係止ピン１２の下端部１２ａの突出を許容するピン突出孔９３ｂと、係止ピン１２の下端部１２ａがピン突出孔９３ｂより下方に突出される方向に該係止ピン１２を付勢するコイルスプリング１３と、下部支持部材８におけるピン突出孔９３ｂと対向する部分に形成した係止ピン１２の下端部１２ａの係合を許容する係止孔８３とを備えている。   The wheel fixing mechanism 11 includes a locking pin 12 accommodated so as to be movable up and down with respect to a pin accommodating portion 93 formed on the upper support member 9, and a lower end portion 12 a of the locking pin 12 formed on the lower end portion of the pin accommodating portion 93. A pin projecting hole 93b that permits the protrusion of the locking pin 12, a coil spring 13 that urges the locking pin 12 in a direction in which the lower end portion 12a of the locking pin 12 protrudes downward from the pin protruding hole 93b, and the lower support member 8 And a locking hole 83 that allows the lower end 12a of the locking pin 12 to be engaged with the pin protruding hole 93b.

さらに、ピン収容部９３より上方に突出した係止ピン１２の上端部に対して上下回動可能に連結され、係止ピン１２の下端部１２ａがピン突出孔９３ｂから抜き取られる固定解除方向Ｃと、係止ピン１２の下端部１２ａがピン突出孔９３ｂに係合される固定解除方向Ｃと反対の回転固定方向Ｌとに回動操作される操作レバー１４を備えている（図５、図６参照）。   Further, the lock release direction C is coupled to the upper end portion of the locking pin 12 protruding upward from the pin accommodating portion 93 so as to be vertically rotatable, and the lower end portion 12a of the locking pin 12 is extracted from the pin protruding hole 93b. The lower end portion 12a of the locking pin 12 is provided with an operation lever 14 that is rotated in the rotation fixing direction L opposite to the fixing release direction C engaged with the pin protruding hole 93b (FIGS. 5 and 6). reference).

下部支持部材８は、平面から見て略丸形状に形成した上部軸受部８１と、該上部軸受部８１の下部両側面に形成した側面から見て斜め下方に延びる下部軸受部８２とを一体で構成している。
上部軸受部８１は、垂直方向Ｖに貫通する軸受孔８１ａを、該上部軸受部８１の上面側中央部に形成し、ボールベアリング型の軸受部材８１ｂを、該軸受孔８１ａ内の上下に装填している（図５、図６参照）。 The lower support member 8 is integrally formed with an upper bearing portion 81 that is formed in a substantially circular shape when viewed from above and a lower bearing portion 82 that extends obliquely downward as viewed from the side surfaces formed on both lower side surfaces of the upper bearing portion 81. It is composed.
The upper bearing portion 81 has a bearing hole 81a penetrating in the vertical direction V formed in the center portion on the upper surface side of the upper bearing portion 81, and ball bearing type bearing members 81b are loaded vertically in the bearing hole 81a. (See FIGS. 5 and 6).

軸受孔８１ａに装填した上下の軸受部材８１ｂには、垂直軸１０の下端側を、ワッシャ８１ｃを介して上方より垂直に挿入している。軸受孔８１ａより下方に突出した垂直軸１０の下端部には、ワッシャ８１ｄを介して戻止めナット８１ｅを螺合している。
これにより、下部支持部材８の上部軸受部８１を、垂直軸１０の下端部に対して、該垂直軸１０を中心として旋回方向Ａに水平旋回可能に取り付けている（図５、図６参照）。 In the upper and lower bearing members 81b loaded in the bearing hole 81a, the lower end side of the vertical shaft 10 is inserted vertically from above through a washer 81c. A detent nut 81e is screwed to a lower end portion of the vertical shaft 10 protruding downward from the bearing hole 81a through a washer 81d.
Accordingly, the upper bearing portion 81 of the lower support member 8 is attached to the lower end portion of the vertical shaft 10 so as to be horizontally rotatable in the turning direction A about the vertical shaft 10 (see FIGS. 5 and 6). .

上部軸受部８１の上部外周面には、例えば、キズ付き、あるいは部品が損傷することを防止するため、上部軸受部８１よりも大径に形成したリング状の緩衝部材８１ｆを嵌着している（図５、図６参照）。   A ring-shaped buffer member 81f formed larger in diameter than the upper bearing portion 81 is fitted to the upper outer peripheral surface of the upper bearing portion 81 in order to prevent scratches or damage to parts, for example. (See FIGS. 5 and 6).

下部軸受部８２は、正面から見て上下逆Ｕ字形状のフォーク部８２ａを、側面から見て上部軸受部８１の下部両側面から斜め下方に延びる形状に形成するとともに、平面から見て垂直軸１０を中心として径外方向に向けて延びる延出形状に形成している。
該フォーク部８２ａの下端部には、前部車輪３ａの回転中心に対してフリー回転可能に挿通した水平軸８２ｂの両端を軸受している（図５、図６参照）。 The lower bearing portion 82 has a fork portion 82a having an upside down U shape when viewed from the front, and has a shape extending obliquely downward from both lower side surfaces of the upper bearing portion 81 when viewed from the side, and a vertical axis when viewed from the plane. 10 is formed in an extending shape extending in the radially outward direction from the center.
At both ends of the fork portion 82a, both ends of a horizontal shaft 82b inserted so as to be freely rotatable with respect to the rotation center of the front wheel 3a are supported (see FIGS. 5 and 6).

上部軸受部８１における後述するピン突出孔９３ｂと対向する上部周縁部には、後述する係止ピン１２の係合が許容される係止孔８３を、垂直軸１０を中心として径外方向に向けて延出した下部軸受部８２と対応して１箇所形成している。
係止孔８３は、下部軸受部８２における上部周縁部の一部を切り欠いて形成するとともに、係止ピン１２における下端部１２ａの係合が許容される大きさ及び形状に形成している（図５、図６参照）。 A locking hole 83 in which engagement of a locking pin 12 described later is allowed is directed radially outward about the vertical shaft 10 in an upper peripheral portion of the upper bearing portion 81 that faces a pin protruding hole 93b described later. One portion corresponding to the extended lower bearing portion 82 is formed.
The locking hole 83 is formed by cutting out a part of the upper peripheral edge portion of the lower bearing portion 82 and having a size and shape that allows the engagement of the lower end portion 12a of the locking pin 12 ( (See FIGS. 5 and 6).

上部支持部材９は、平面から見て略丸形状に形成した枠受部９１と、枠受部９１の前方側Ｘａに形成した筒状の軸受部９２と、上部支持部材９の前後方向Ｘ中央に形成したピン収容部９３とを一体で構成するとともに、軸受部９２及びピン収容部９３の上端側開口部を覆う抜止め部材９４とで構成している（図５、図６参照）。   The upper support member 9 includes a frame receiving portion 91 formed in a substantially round shape when viewed from above, a cylindrical bearing portion 92 formed on the front side Xa of the frame receiving portion 91, and the front and rear direction X center of the upper support member 9. The pin housing portion 93 formed integrally with the bearing portion 92 and a retaining member 94 that covers the opening portion on the upper end side of the bearing portion 92 and the pin housing portion 93 (see FIGS. 5 and 6).

枠受部９１は、前部枠体３の挿入を許容する大きさ及び形状に形成した有底筒状の枠挿入孔９１ａに、前部枠体３における前側斜め下方に延びる下端部を挿入して、ねじ等で固定している（図５、図６参照）。   The frame receiving portion 91 inserts a lower end portion extending obliquely downward on the front side of the front frame body 3 into a bottomed cylindrical frame insertion hole 91a formed in a size and shape that allows insertion of the front frame body 3. And fixed with screws or the like (see FIGS. 5 and 6).

軸受部９２の下端側中央部には、垂直軸１０の下端側外周面に形成したナット部１０ａとの係合を許容する大きさ及び形状で、かつ、底面から見て略六角形状に形成した凹状のナット係合部９２ａを形成している。該ナット係合部９２ａの中心部には、垂直軸１０の挿入が許容される孔径の軸受孔９２ｂを垂直方向Ｖに貫通して形成している（図５、図６参照）。   The bearing portion 92 has a size and shape that allows engagement with a nut portion 10a formed on the outer peripheral surface of the lower end side of the vertical shaft 10 and a substantially hexagonal shape when viewed from the bottom surface. A concave nut engaging portion 92a is formed. A bearing hole 92b having a hole diameter allowing the insertion of the vertical shaft 10 is formed in the central portion of the nut engaging portion 92a in the vertical direction V (see FIGS. 5 and 6).

ピン収容部９３は、１つの係止ピン１２と、２つのコイルスプリング１３の収容が許容される大きさ及び形状に形成した収容室９３ａと、該収容室９３ａの下端部に形成したピン突出孔９３ｂとで構成している。
ピン突出孔９３ｂは、係止ピン１２における下端部１２ａの突出が許容される大きさ及び形状に形成している（図５、図６参照）。 The pin accommodating portion 93 includes an accommodating chamber 93a formed in a size and shape that allows one locking pin 12 and two coil springs 13 to be accommodated, and a pin protruding hole formed in the lower end of the accommodating chamber 93a. 93b.
The pin protruding hole 93b is formed in a size and shape that allows the lower end 12a to protrude from the locking pin 12 (see FIGS. 5 and 6).

収容室９３ａにおける上端側開口部の両側縁部には、後述する操作レバー１４の本体部１４ａより幅広となる間隔を隔てて軸支持部９３ｃを形成している。軸支持部９３ｃには、後述する連結軸１５の挿入及び上下動が許容される縦長の長孔９３ｄを形成している（図５、図６参照）。   A shaft support portion 93c is formed on both side edge portions of the upper end side opening in the accommodation chamber 93a with a gap wider than a main body portion 14a of the operation lever 14 described later. The shaft support portion 93c is formed with a vertically long slot 93d that allows insertion and vertical movement of the connecting shaft 15 described later (see FIGS. 5 and 6).

係止ピン１２は、収容室９３ａおける幅方向Ｗの中央部に上下動可能に収容している。２つのコイルスプリング１３は、収容室９３ａ内における係止ピン１２の両側部にそれぞれ装填している。   The locking pin 12 is accommodated in the central portion in the width direction W of the accommodation chamber 93a so as to be movable up and down. The two coil springs 13 are loaded on both sides of the locking pin 12 in the accommodation chamber 93a.

係止ピン１２における下端部１２ａより上側両側部には、ピン突出孔９３ｂの内側縁部に対して当接される突出部１２ｂを幅方向Ｗに突出している。突出部１２ｂの上端側には、コイルスプリング１３の下端が係止される突起１２ｃを上向きに突出している（図５、図６参照）。   On both side portions above the lower end portion 12a of the locking pin 12, projecting portions 12b that abut against the inner edge of the pin projecting hole 93b project in the width direction W. On the upper end side of the protruding portion 12b, a protrusion 12c that engages the lower end of the coil spring 13 protrudes upward (see FIGS. 5 and 6).

コイルスプリング１３の下端は、係止ピン１２における突出部１２ｂの突起１２ｃに係止している。コイルスプリング１３の上端は、後述する抜止め部材９４のピン受部９４ａの下面側に当接している。   The lower end of the coil spring 13 is locked to the protrusion 12 c of the protruding portion 12 b of the locking pin 12. The upper end of the coil spring 13 is in contact with the lower surface side of a pin receiving portion 94a of a retaining member 94 described later.

収容室９３ａに装填したコイルスプリング１３は、係止ピン１２を、該係止ピン１２の下端部１２ａが収容室９３ａのピン突出孔９３ｂより下方に向けて突出される方向に常時付勢している（図５、図６参照）。   The coil spring 13 loaded in the storage chamber 93a constantly urges the locking pin 12 in a direction in which the lower end portion 12a of the locking pin 12 protrudes downward from the pin protruding hole 93b of the storage chamber 93a. (See FIGS. 5 and 6).

また、係止ピン１２の下端部１２ａをピン突出孔９３ｂより下方に突出した際、係止ピン１２の突出部１２ｂがピン突出孔９３ｂの内側縁部に当接されるため、該係止ピン１２の下端部１２ａがピン突出孔９３ｂより下方に所定長さ以上に突出されることを防止するとともに、係止ピン１２がピン突出孔９３ｂから抜け落ちることを防止している（図５、図６参照）。   Further, when the lower end portion 12a of the locking pin 12 protrudes downward from the pin protruding hole 93b, the protruding portion 12b of the locking pin 12 comes into contact with the inner edge of the pin protruding hole 93b. 12 is prevented from protruding below a predetermined length below the pin protrusion hole 93b, and the locking pin 12 is prevented from falling out of the pin protrusion hole 93b (FIGS. 5 and 6). reference).

係止ピン１２の上端側は、該係止ピン１２の下端部１２ａをピン突出孔９３ｂより下方に所定長さ突出した状態において、ピン収容部９３における収容室９３ａの上端側開口部より上方に突出されるとともに、後述する抜止め部材９４におけるピン受部９４ａのピン挿通孔９５ａより上方に突出が許容される長さに形成している。   The upper end side of the locking pin 12 is located above the upper end side opening of the receiving chamber 93a in the pin receiving portion 93 in a state where the lower end portion 12a of the locking pin 12 protrudes a predetermined length below the pin protruding hole 93b. In addition to being protruded, it is formed to have a length that allows protrusion beyond the pin insertion hole 95a of the pin receiving portion 94a of the retaining member 94 described later.

また、係止ピン１２におけるピン挿通孔９５ａより上方に突出される上端部には、後述する連結軸１５の挿入が許容される孔部１２ｄを幅方向Ｗに貫通して形成している（図５、図６参照）。   Further, a hole 12d that allows insertion of a connecting shaft 15 to be described later is formed in the upper end of the locking pin 12 that protrudes upward from the pin insertion hole 95a in the width direction W (see FIG. 5, see FIG.

抜止め部材９４は、後述する係止ピン１２の上端側を上下動可能に支持するピン受部９４ａと、該ピン受部９４の前方側Ｘａに形成した垂直軸１０の上端側を軸受する軸受部９４ｂとを一体で構成している（図５、図６参照）。   The retaining member 94 includes a pin receiving portion 94a that supports an upper end side of a locking pin 12 described later so as to be movable up and down, and a bearing that supports the upper end side of the vertical shaft 10 formed on the front side Xa of the pin receiving portion 94. The portion 94b is integrally formed (see FIGS. 5 and 6).

ピン受部９４ａには、後述する係止ピン１２の上端側の上下動が許容される大きさ及び形状に形成したピン挿通孔９５ａを垂直方向Ｖに貫通して形成している。軸受部９４ｂには、垂直軸１０の挿入が許容される孔径の軸受孔９５ｂを垂直方向Ｖに貫通して形成している（図５、図６参照）。   The pin receiving portion 94a is formed with a pin insertion hole 95a formed in a size and shape that allows vertical movement on the upper end side of the locking pin 12 described later, penetrating in the vertical direction V. The bearing portion 94b is formed with a bearing hole 95b having a hole diameter that allows insertion of the vertical shaft 10 in the vertical direction V (see FIGS. 5 and 6).

軸受部９２の軸受孔９２ｂには、垂直軸１０の上端側を下方から垂直に挿入して、該垂直軸１０のナット部１０ａを軸受部９２のナット係合部９２ａに係合している。軸受部９２に挿入した垂直軸１０の上端側は、抜止め部材９４における軸受部９４ｂの軸受孔９５ｂに挿入している（図５、図６参照）。   The upper end side of the vertical shaft 10 is vertically inserted into the bearing hole 92b of the bearing portion 92 from below, and the nut portion 10a of the vertical shaft 10 is engaged with the nut engaging portion 92a of the bearing portion 92. The upper end side of the vertical shaft 10 inserted into the bearing portion 92 is inserted into the bearing hole 95b of the bearing portion 94b in the retaining member 94 (see FIGS. 5 and 6).

軸受孔９５ｂより上方に突出した垂直軸１０の上端部には、ワッシャ９６を介して戻止めナット９７を螺合している。
これにより、垂直軸１０の上端側を、上部支持部材９の軸受部９２に対して回転不可に固定している。
また、戻止めナット９７の外面には、戻止めナット９７の外面を覆う大きさ及び形状に形成したナットキャップ９８を装着している（図５、図６参照）。 A detent nut 97 is screwed into the upper end portion of the vertical shaft 10 protruding upward from the bearing hole 95b through a washer 96.
Thereby, the upper end side of the vertical shaft 10 is fixed to the bearing portion 92 of the upper support member 9 so as not to rotate.
A nut cap 98 formed in a size and shape covering the outer surface of the detent nut 97 is attached to the outer surface of the detent nut 97 (see FIGS. 5 and 6).

操作レバー１４は、係止ピン１２の上端部に対して連結される基端部側の本体部１４ａと、利用者の手で回動操作される遊端部側の操作部１４ｂとで構成している（図５、図６参照）。
本体部１４ａの両側壁部には、後述する連結軸１５の挿入が許容される孔部１４ｄを幅方向Ｗに貫通して形成している。 The operation lever 14 is composed of a base end side main body portion 14a connected to the upper end portion of the locking pin 12 and a free end side operation portion 14b that is rotated by a user's hand. (See FIGS. 5 and 6).
On both side walls of the main body portion 14a, a hole portion 14d in which insertion of a connecting shaft 15 described later is allowed is formed so as to penetrate in the width direction W.

操作レバー１４の操作部１４ｂは、戻止めナット９７に装着したナットキャップ９８の外面を覆う大きさ及び形状に形成している。
なお、ナットキャップ９８を戻止めナット９７に装着しない場合、操作部１４ｂを、戻止めナット９７の外面を覆う大きさ及び形状に形成してもよい。 The operation portion 14 b of the operation lever 14 is formed in a size and shape that covers the outer surface of the nut cap 98 attached to the detent nut 97.
When the nut cap 98 is not attached to the detent nut 97, the operation portion 14b may be formed in a size and shape that covers the outer surface of the detent nut 97.

操作レバー１４の本体部１４ａは、連結軸１５を介して係止ピン１２の上端部に連結している。すなわち、本体部１４ａを、収容室９３ａに形成した軸支持部９３ｃの間に挿入し、係止ピン１２の孔部１２ｄと、本体部１４ａの孔部１４ｄと、軸支持部９３ｃの長孔９３ｄとを連通する。   The main body portion 14 a of the operation lever 14 is connected to the upper end portion of the locking pin 12 via the connecting shaft 15. That is, the main body portion 14a is inserted between the shaft support portions 93c formed in the storage chamber 93a, the hole portion 12d of the locking pin 12, the hole portion 14d of the main body portion 14a, and the long hole 93d of the shaft support portion 93c. Communicate with.

連通後において、連結軸１５を、孔部１２ｄ，１４ｄ及び長孔９３ｄに対して幅方向Ｗの一方から挿通するとともに、幅方向Ｗの他方に突出した連結軸１５の軸端部に、ワッシャ１６を介して戻止めナット１７を螺合している。
これにより、操作レバー１４を、係止ピン１２の上端部に対して上下回動可能に連結するとともに、固定解除方向Ｃ（例えばロック解除方向）と回転固定方向Ｌ（例えばはロック方向）とに回動操作可能に設けている（図６、図８参照）。 After the communication, the connecting shaft 15 is inserted into the holes 12d, 14d and the long hole 93d from one side in the width direction W, and is attached to the shaft end portion of the connecting shaft 15 protruding to the other side in the width direction W. The detent nut 17 is screwed in via.
As a result, the operation lever 14 is connected to the upper end portion of the locking pin 12 so as to be rotatable up and down, and in the unlocking direction C (for example, unlocking direction) and the rotation fixing direction L (for example, locking direction). It is provided so that it can be rotated (see FIGS. 6 and 8).

本体部１４ａにおける両側壁部の周縁部には、抜止め部材９４におけるピン受部９４ａの上面側平坦部分に対して当接されるカム部２０を形成している。
カム部２０は、本体部１４ａにおける両側壁部の下側縁部に形成した水平カム部２０ａと、本体部１４ａにおける両側壁部の一側縁部（操作部１４ｂと反対側の縁部）に形成した起立カム部２０ｂと、カム部２０ａ，２０ｂが成す角隅部の縁部に形成した支点カム部２０ｃとで構成している（図５、図６参照）。 Cam portions 20 are formed on the peripheral edge portions of both side wall portions of the main body portion 14a so as to come into contact with the upper surface side flat portion of the pin receiving portion 94a of the retaining member 94.
The cam portion 20 includes a horizontal cam portion 20a formed on the lower edge of both side wall portions of the main body portion 14a, and one side edge portion (an edge portion on the opposite side of the operation portion 14b) of the both side wall portions of the main body portion 14a. The standing cam portion 20b is formed, and a fulcrum cam portion 20c formed at the edge of the corner formed by the cam portions 20a and 20b (see FIGS. 5 and 6).

水平カム部２０ａと、起立カム部２０ｂと、支点カム部２０ｃは、この順に高くなるように形成している。
水平カム部２０ａにおけるピン受部９４ａの上面側平坦部分に対して当接される部分は、起立カム部２０ｂ及び支点カム部２０ｃよりも低く形成している（図５参照）。 The horizontal cam portion 20a, the standing cam portion 20b, and the fulcrum cam portion 20c are formed so as to increase in this order.
A portion of the horizontal cam portion 20a that is in contact with a flat portion on the upper surface side of the pin receiving portion 94a is formed lower than the standing cam portion 20b and the fulcrum cam portion 20c (see FIG. 5).

起立カム部２０ｂにおけるピン受部９４ａの上面側平坦部分に対して当接される部分は、水平カム部２０ａよりも高く、支点カム部２０ｃよりも低く形成している。
支点カム部２０ｃにおけるピン受部９４ａの上面側平坦部分に対して当接される部分は、水平カム部２０ａ及び起立カム部２０ｂよりも高く形成している（図５参照）。 The portion of the standing cam portion 20b that is in contact with the flat portion on the upper surface side of the pin receiving portion 94a is higher than the horizontal cam portion 20a and lower than the fulcrum cam portion 20c.
The portion of the fulcrum cam portion 20c that is in contact with the flat portion on the upper surface side of the pin receiving portion 94a is formed higher than the horizontal cam portion 20a and the standing cam portion 20b (see FIG. 5).

水平カム部２０ａ及び起立カム部２０ｂにおけるピン受部９４ａの上面側平坦部分に対して当接される部分は、ピン受部９４ａの上面側平坦部分と対応して平坦に形成している。
支点カム部２０ｃにおけるピン受部９４ａの上面側平坦部分に対して当接される部分は、カム部２０ａ，２０ｂと連続して滑らかな曲面に形成している（図５参照）。 The portions of the horizontal cam portion 20a and the standing cam portion 20b that are in contact with the flat portion on the upper surface side of the pin receiving portion 94a are formed to be flat corresponding to the flat portion on the upper surface side of the pin receiving portion 94a.
A portion of the fulcrum cam portion 20c that is in contact with the flat portion on the upper surface side of the pin receiving portion 94a is formed in a smooth curved surface continuously with the cam portions 20a and 20b (see FIG. 5).

上述の歩行車１を、所望する方向へ走行移動させる際の車輪固定機構１１の操作方法について説明する。
先ず、図６中実線で示す倒伏姿勢に倒伏した操作レバー１４を、連結軸１５を中心として固定解除方向Ｃへ回動操作するとともに、図６中実線で示す倒伏姿勢から図中仮想線で示す起立姿勢へ回動する際に、カム部２０における支点カム部２０ｃを、上部支持部材９に固定した抜止め部材９４におけるピン受部９４ａの上面側平坦部分に当接する（図６、図７参照）。 An operation method of the wheel fixing mechanism 11 when the above-described walking vehicle 1 travels in a desired direction will be described.
First, the operating lever 14 that has fallen to the lying posture shown by the solid line in FIG. 6 is rotated in the fixing release direction C about the connecting shaft 15 and is shown by the virtual line in the drawing from the lying posture shown by the solid line in FIG. When rotating to the standing posture, the fulcrum cam portion 20c of the cam portion 20 is brought into contact with the flat portion on the upper surface side of the pin receiving portion 94a of the retaining member 94 fixed to the upper support member 9 (see FIGS. 6 and 7). ).

つまり、操作レバー１４を、ピン受部９４ａの上面側平坦部分に当接した支点カム部２０ｃを支点として固定解除方向Ｃへ回動するため、テコの原理により、コイルスプリング１３に抗して容易に回動操作することができる（図６、図７参照）。   That is, since the operating lever 14 is rotated in the unlocking direction C with the fulcrum cam portion 20c abutting against the flat portion on the upper surface side of the pin receiving portion 94a as a fulcrum, it is easy to resist the coil spring 13 by the lever principle. (See FIGS. 6 and 7).

操作レバー１４を固定解除方向Ｃへ回動操作する動作に伴って、連結軸１５を、ピン収容部９３における軸支持部９３ｃの長孔９３ｄに沿って上方へ移動させながら、連結軸１５を介して、操作レバー１４に連結した係止ピン１２を、コイルスプリング１３に抗して上方へ引き上げる。
これにより、係止ピン１２の下端部１２ａを、下部支持部材８における下部軸受部８２の係止孔８３から抜き取り、係止孔８３に対する係止ピン１２の係合を解除する（図７、図８参照）。 Along with the operation of rotating the operation lever 14 in the fixing release direction C, the connection shaft 15 is moved upward along the elongated hole 93d of the shaft support portion 93c in the pin accommodating portion 93 via the connection shaft 15. Then, the locking pin 12 connected to the operation lever 14 is pulled upward against the coil spring 13.
Thus, the lower end portion 12a of the locking pin 12 is extracted from the locking hole 83 of the lower bearing portion 82 in the lower support member 8, and the engagement of the locking pin 12 with respect to the locking hole 83 is released (FIGS. 7 and 7). 8).

また、操作レバー１４を、図７中実線で示す起立姿勢に回動操作した際に、カム部２０における起立カム部２０ｂの平坦部分を、抜止め部材９４におけるピン受部９４ａの上面側平坦部分に対して垂直に当接するため、操作レバー１４を垂直に起立した起立姿勢に回動規制することができる（図７参照）。   Further, when the operation lever 14 is rotated to the standing posture shown by the solid line in FIG. 7, the flat portion of the standing cam portion 20 b in the cam portion 20 is replaced with the flat portion on the upper surface side of the pin receiving portion 94 a in the retaining member 94. Therefore, the operation lever 14 can be restricted to rotate in a standing posture in which the operation lever 14 stands vertically (see FIG. 7).

これにより、下部支持部材８と上部支持部材９の回転固定が解除され、相対回転が可能となるため、該支持部材８，９を介して、前部枠体３の下端部に対して水平旋回可能に取り付けた前部車輪３ａを、上部支持部材９の垂直軸１０を中心として所望する方向（旋回方向Ａ）へ水平旋回することができる。   As a result, the rotational support of the lower support member 8 and the upper support member 9 is released and relative rotation is possible, so that the lower support member 8 and 9 are rotated horizontally with respect to the lower end portion of the front frame 3. The front wheel 3a that can be attached can be turned horizontally in a desired direction (turning direction A) around the vertical shaft 10 of the upper support member 9.

この結果、歩行車１の走行方向に応じて、前部枠体３の下端部に対して水平旋回可能に取り付けた前部車輪３ａが水平旋回（あるいは首振り回転）するため、歩行車１を、利用者の手で所望する走行方向に向けて走行移動させることができる。   As a result, the front wheel 3a attached to the lower end portion of the front frame 3 so as to be able to turn horizontally is turned horizontally (or swung around) according to the traveling direction of the walking vehicle 1. The user can move the vehicle in the desired direction of travel.

しかも、操作レバー１４を、図７中実線で示す起立姿勢に回動操作した際に、コイルスプリング１３によって起立カム部２０ｂの平坦部分と、ピン受部９４ａの上面側平坦部分とを互いに当接した状態に付勢するため、操作レバー１４が回転固定方向Ｌへ回動することを積極的に防止することができるとともに、下部支持部材８と上部支持部材９との回転固定が解除された固定解除状態（例えばロック解除状態）をより確実に保つことができる（図７参照）。   Moreover, when the operation lever 14 is rotated to the upright posture shown by the solid line in FIG. 7, the flat portion of the standing cam portion 20b and the flat portion on the upper surface side of the pin receiving portion 94a are brought into contact with each other by the coil spring 13. Since the operation lever 14 is positively prevented from rotating in the rotation fixing direction L, the rotation fixing between the lower support member 8 and the upper support member 9 is released. The released state (for example, the unlocked state) can be more reliably maintained (see FIG. 7).

次に、歩行車１を、前方側Ｘａに向けて走行移動させる際の車輪固定機構１１の操作方法について説明する。
先ず、図７中実線で示す起立姿勢に起立した操作レバー１４を、連結軸１５を中心として回転固定方向Ｌへ回動操作するとともに、図７中実線で示す起立姿勢から図中仮想線で示す倒伏姿勢へ回動する際に、カム部２０の支点カム部２０ｃを、上部支持部材９に固定した抜止め部材９４におけるピン受部９４ａの上面側平坦部分に当接する（図６、図７参照）。 Next, an operation method of the wheel fixing mechanism 11 when moving the walking vehicle 1 toward the front side Xa will be described.
First, the operation lever 14 raised in the standing posture shown by the solid line in FIG. 7 is rotated in the rotation fixing direction L about the connecting shaft 15 and is shown by the virtual line in the drawing from the standing posture shown by the solid line in FIG. When rotating to the lying down posture, the fulcrum cam portion 20c of the cam portion 20 abuts against the flat portion on the upper surface side of the pin receiving portion 94a in the retaining member 94 fixed to the upper support member 9 (see FIGS. 6 and 7). ).

つまり、操作レバー１４を、ピン受部９４ａの上面側平坦部分に当接した支点カム部２０ｃを支点として回転固定方向Ｌへ回動するため、テコの原理と、コイルスプリング１３の付勢力とにより容易に回動操作することができる（図６、図７参照）。   That is, since the operation lever 14 is rotated in the rotation fixing direction L with the fulcrum cam portion 20c that is in contact with the upper flat portion of the pin receiving portion 94a as a fulcrum, the lever principle and the biasing force of the coil spring 13 are used. It can be easily rotated (see FIGS. 6 and 7).

操作レバー１４を回転固定方向Ｌへ回動操作する動作に伴って、連結軸１５を、ピン収容部９３の長孔９３ｄに沿って下方へ移動させながら、連結軸１５を介して、操作レバー１４に連結した係止ピン１２を、コイルスプリング１３の付勢力によって下方へ押し下げる（図６、図７参照）。   Along with the operation of rotating the operation lever 14 in the rotation fixing direction L, the operation lever 14 is moved via the connection shaft 15 while moving the connection shaft 15 downward along the elongated hole 93 d of the pin housing portion 93. The locking pin 12 connected to is pushed downward by the biasing force of the coil spring 13 (see FIGS. 6 and 7).

このとき、ピン収容部９３におけるピン突出孔９３ｂの直下に、下部支持部材８における下部軸受部８２の係止孔８３が回転移動していれば、ピン突出孔９３ｂより突出する係止ピン１２の下端部１２ａを、下部軸受部８２の係止孔８３に対して係合することができるため、前部車輪３ａが軸受された下部支持部材８を、歩行車１の前後方向Ｘと一致する方向に向けた状態に回転固定することができる（図６、図７参照）。   At this time, if the locking hole 83 of the lower bearing portion 82 of the lower support member 8 rotates and moves directly below the pin protruding hole 93b of the pin accommodating portion 93, the locking pin 12 protruding from the pin protruding hole 93b of the lower supporting member 8 is rotated. Since the lower end portion 12 a can be engaged with the locking hole 83 of the lower bearing portion 82, the lower support member 8 on which the front wheel 3 a is supported is aligned with the front-rear direction X of the walking vehicle 1. (See FIGS. 6 and 7).

また、操作レバー１４を、図６中実線で示す倒伏姿勢に回動操作した際に、カム部２０における水平カム部２０ａの平坦部分を、抜止め部材９４におけるピン受部９４ａの上面側平坦部分に対して垂直に当接するため、操作レバー１４を水平に倒伏した倒伏姿勢に回動規制することができる（図６参照）。   Further, when the operating lever 14 is rotated to the lying posture shown by the solid line in FIG. 6, the flat portion of the horizontal cam portion 20 a in the cam portion 20 is replaced with the flat portion on the upper surface side of the pin receiving portion 94 a in the retaining member 94. Therefore, the operation lever 14 can be restricted to turn to a lying posture in which the operation lever 14 is lying horizontally (see FIG. 6).

これにより、下部支持部材８と上部支持部材９を相対回転不可に回転固定することができるとともに、該支持部材８，９を介して、前部枠体３の下端部に対して水平旋回可能に取り付けた前部車輪３ａを、歩行車１の前後方向Ｘと一致する方向に向けた状態に確実に固定することができる（図６参照）。   As a result, the lower support member 8 and the upper support member 9 can be rotationally fixed so as not to rotate relative to each other, and can be turned horizontally with respect to the lower end portion of the front frame 3 via the support members 8 and 9. The attached front wheel 3a can be reliably fixed in a state in which the front wheel 3a is directed in a direction that coincides with the front-rear direction X of the walking vehicle 1 (see FIG. 6).

この結果、歩行車１の走行方向と、左右の前部枠体３の下端部に取り付けた前部車輪３ａの回転方向とが一致するため、歩行車１の手押し操作中において、歩行車１が予期せぬ方向に走行移動することを防止することができ、歩行車１の直進性が向上する。   As a result, the traveling direction of the walking vehicle 1 and the rotation direction of the front wheels 3a attached to the lower ends of the left and right front frame bodies 3 coincide with each other. Traveling in an unexpected direction can be prevented, and the straight traveling performance of the walking vehicle 1 is improved.

しかも、操作レバー１４を、図６中実線で示す倒伏姿勢に回動操作した際に、コイルスプリング１３によって水平カム部２０ａの平坦部分と、ピン受部９４ａの上面側平坦部分とを互いに当接した状態に付勢するため、操作レバー１４が固定解除方向Ｃへ回動することを積極的に防止することができるとともに、下部支持部材８と上部支持部材９とが相対回転不可に回転固定された回転固定状態（例えばロック状態）をより確実に保つことができる（図６参照）。   Moreover, when the operating lever 14 is rotated to the lying posture shown by the solid line in FIG. 6, the flat portion of the horizontal cam portion 20a and the flat portion on the upper surface side of the pin receiving portion 94a are brought into contact with each other by the coil spring 13. Since the operation lever 14 is positively prevented from rotating in the unlocking direction C, the lower support member 8 and the upper support member 9 are rotationally fixed so that they cannot rotate relative to each other. The rotation fixed state (for example, locked state) can be maintained more reliably (see FIG. 6).

さらに、係止ピン１２を、コイルスプリング１３の付勢力によって係止孔８３に対して係合される方向に付勢しているため、互いに係合した状態において、係止ピン１２が係止孔８３から引き抜かれることを防止することができる。
これにより、前部枠体３の下端部に対して水平旋回可能に取り付けた前部車輪３ａを、歩行車１の前後方向Ｘと一致する方向に向けた状態に保つことができる。 Further, since the locking pin 12 is urged in the direction to be engaged with the locking hole 83 by the urging force of the coil spring 13, the locking pin 12 is engaged with the locking hole when engaged with each other. It can be prevented from being pulled out from 83.
Thereby, the front wheel 3a attached to the lower end portion of the front frame 3 so as to be able to turn horizontally can be maintained in a state in which the front wheel 3a is directed in a direction that coincides with the front-rear direction X of the walking vehicle 1.

さらにまた、操作レバー１４を、図６中実線で示す倒伏姿勢に回動操作して、操作部１４ｂを、戻止めナット９７に装着したナットキャップ９８の外面に対して一体に覆い被せて保護する。
これにより、例えば、操作レバー１４に対して付与される衝撃は、戻止めナット９７及びナットキャップ９８にも伝えられるため、操作レバー１４に付与される衝撃を緩和することができ、耐久性を向上することができる。 Furthermore, the operation lever 14 is rotated to the lying posture shown by the solid line in FIG. 6, and the operation portion 14 b is integrally covered and protected against the outer surface of the nut cap 98 attached to the detent nut 97. .
Thereby, for example, since the impact applied to the operation lever 14 is also transmitted to the detent nut 97 and the nut cap 98, the impact applied to the operation lever 14 can be reduced, and durability is improved. can do.

また、操作レバー１４を、図９中実線で示す倒伏姿勢に回動操作した固定解除状態において、水平旋回可能な下部支持部材８が後方側Ｘｂ以外の方向、例えば、図９中実線で示す前方側Ｘａに回動すると、下部軸受部８２の係止孔８３が、ピン突出孔９３ｂとの対向が回避される位置へ回転移動するため、ピン突出孔９３ｂより突出した係止ピン１２の下端部１２ａは、コイルスプリング１３によって下部軸受部８２の上面側平坦部分に対して当接した状態に付勢される（図９参照）。   Further, in the unlocked state in which the operation lever 14 is rotated to the lying posture shown by the solid line in FIG. 9, the lower support member 8 capable of horizontal turning is in a direction other than the rear side Xb, for example, the front shown by the solid line in FIG. When rotating to the side Xa, the locking hole 83 of the lower bearing portion 82 rotates and moves to a position where the locking hole 83 is prevented from facing the pin protruding hole 93b, so that the lower end of the locking pin 12 protruding from the pin protruding hole 93b 12a is urged by the coil spring 13 so as to be in contact with the upper flat portion of the lower bearing portion 82 (see FIG. 9).

しかし、下部支持部材８の下部軸受部８２を、下部軸受部８に対して側面から見て斜め下方に延びる形状に形成しているため、歩行車１を所望する走行方向に向けて走行移動させると、下部支持部材８の全体が垂直軸１０を中心として後方側Ｘｂへ水平旋回することになる（図７、図９参照）。   However, since the lower bearing portion 82 of the lower support member 8 is formed in a shape extending obliquely downward as viewed from the side with respect to the lower bearing portion 8, the walking vehicle 1 is caused to travel in a desired traveling direction. As a result, the entire lower support member 8 turns horizontally to the rear side Xb about the vertical axis 10 (see FIGS. 7 and 9).

すなわち、歩行車１を所望する方向へ走行移動させる際の移動力を利用して、下部支持部材８の下部軸受部８２を、歩行車１の走行方向と反対の方向（後方側Ｘｂ）へ水平旋回させるため、下部支持部材８の係止孔８３を、上部支持部材９のピン突出孔９３ｂと対向する位置に回転移動することができる（図７参照）。   That is, the lower bearing portion 82 of the lower support member 8 is horizontally moved in the direction opposite to the traveling direction of the walking vehicle 1 (rear side Xb) by using the moving force when the walking vehicle 1 travels in the desired direction. In order to rotate, the locking hole 83 of the lower support member 8 can be rotated and moved to a position facing the pin protrusion hole 93b of the upper support member 9 (see FIG. 7).

これにより、下部軸受部８２の係止孔８３がピン突出孔９３ｂの直下に回転移動した際、下部軸受部８２の上面側平坦部分に当接した係止ピン１２の下端部１２ａが、下部軸受部８２の係止孔８３に係合される（図６参照）。   As a result, when the locking hole 83 of the lower bearing portion 82 rotates and moves directly below the pin protruding hole 93b, the lower end portion 12a of the locking pin 12 that is in contact with the flat portion on the upper surface side of the lower bearing portion 82 is It engages with the locking hole 83 of the portion 82 (see FIG. 6).

この結果、下部支持部材８と上部支持部材９を相対回転不可に回転固定することができるとともに、前部枠体３の下端部に対して水平旋回可能に取り付けた前部車輪３ａを、歩行車１の前後方向Ｘと一致する方向に向けた状態により確実に固定することができる。   As a result, the lower support member 8 and the upper support member 9 can be rotated and fixed so as not to rotate relative to each other, and the front wheel 3a attached to the lower end portion of the front frame body 3 so as to be horizontally turnable is used as a walking vehicle. 1 can be reliably fixed in a state in which the direction is the same as the front-rear direction X.

しかも、歩行車１を所望する方向へ走行移動させる際の移動力を利用して、下部支持部材８を水平旋回させるとともに、下部支持部材８の係止孔８３を上部支持部材９のピン突出孔９３ｂと対向する位置に回転移動させるため、下部支持部材８を、利用者の手で水平旋回させるような手間及び作業が省け、上部支持部材８の係止孔８３を、上部支持部材９のピン突出孔９３ｂと対向する位置に回転移動させる作業が容易に行える。   In addition, the lower support member 8 is turned horizontally by using the moving force when the walking vehicle 1 is moved in a desired direction, and the locking hole 83 of the lower support member 8 is moved into the pin protruding hole of the upper support member 9. Since the lower support member 8 is rotated and moved to a position opposite to the position 93b, the labor and work of horizontally turning the lower support member 8 by a user's hand can be saved, and the locking hole 83 of the upper support member 8 can be connected to the pin of the upper support member 9. The operation of rotating and moving to a position facing the protruding hole 93b can be easily performed.

この考案の構成と、前記実施形態との対応において、
この考案のピン付勢手段は、実施形態のコイルスプリング１３に対応するも、
この考案は、上述の実施形態の構成のみに限定されるものではなく、請求項に示される技術思想に基づいて応用することができ、多くの実施の形態を得ることができる。 In the correspondence between the configuration of this device and the above embodiment,
The pin urging means of this device corresponds to the coil spring 13 of the embodiment,
The present invention is not limited to the configuration of the above-described embodiment, but can be applied based on the technical idea shown in the claims, and many embodiments can be obtained.

本実施形態の車輪固定機構１１は、例えば、後部枠体４の下端部に対して首振り自在に取り付けた後部車輪４ａを、歩行車１の前後方向Ｘと一致する方向に向けた状態に回転固定する機構としても適用することができ、前部車輪３ａのみに用途が限定されるものではない。   The wheel fixing mechanism 11 of the present embodiment rotates, for example, a rear wheel 4 a that is swingably attached to a lower end portion of the rear frame 4 in a state in which the rear wheel 4 a is directed in a direction that coincides with the front-rear direction X of the walking vehicle 1. It can also be applied as a mechanism for fixing, and the application is not limited to the front wheel 3a.

また、上述の実施形態では、係止ピン１２及び係止孔８３を、垂直軸１０を中心として下部軸受部８２と対応する位置に設けた例を説明したが、例えば、係止ピン１２及び係止孔８３を、下部軸受部８２に対して９０度偏心した位置、あるいは、下部軸受部８２に対して１８０度反転した反対側の位置に設けてもよい。   In the above-described embodiment, the example in which the locking pin 12 and the locking hole 83 are provided at positions corresponding to the lower bearing portion 82 with the vertical shaft 10 as the center has been described. The stop hole 83 may be provided at a position that is eccentric by 90 degrees with respect to the lower bearing portion 82 or at an opposite position that is inverted by 180 degrees with respect to the lower bearing portion 82.

Ｘ…前後方向
Ｘａ…前方側
Ｘｂ…後方側
Ｗ…幅方向
Ａ…旋回方向
Ｖ…垂直方向
１…歩行車
２…車本体
３…前部枠体
３ａ…前部車輪
７…車輪支持部
８…下部支持部材
８１…上部軸受部
８２…下部軸受部
８３…係止孔
９…上部支持部材
９１…枠受部
９２…軸受部
９３…ピン収容部
９３ｂ…ピン突出孔
９３ｃ…軸支持部
９３ｄ…長孔
９４…抜止め部材
９４ａ…ピン受部
９５ａ…ピン挿通孔
９７…戻止めナット
９８…ナットキャップ
１０…垂直軸
１１…車輪固定機構
１２…係止ピン
１２ａ…下端部
１３…コイルスプリング
１４…操作レバー
１４ｂ…操作部
１５…連結軸
２０…カム部
２０ａ…水平カム部
２０ｂ…起立カム部
２０ｃ…支点カム部 X: Longitudinal direction Xa ... Front side Xb ... Back side W ... Width direction A ... Turning direction V ... Vertical direction 1 ... Walking car 2 ... Car body 3 ... Front frame 3a ... Front wheel 7 ... Wheel support 8 ... Lower support member 81 ... Upper bearing portion 82 ... Lower bearing portion 83 ... Locking hole 9 ... Upper support member 91 ... Frame receiving portion 92 ... Bearing portion 93 ... Pin housing portion 93b ... Pin projection hole 93c ... Shaft support portion 93d ... Long Hole 94 ... Detachment member 94a ... Pin receiving part 95a ... Pin insertion hole 97 ... Detent nut 98 ... Nut cap 10 ... Vertical shaft 11 ... Wheel fixing mechanism 12 ... Locking pin 12a ... Lower end 13 ... Coil spring 14 ... Operation Lever 14b ... Operation part 15 ... Connecting shaft 20 ... Cam part 20a ... Horizontal cam part 20b ... Standing cam part 20c ... Supporting point cam part

Claims (6)

前部車輪を、車輪支持部を介して車本体における前部枠体の下端部に対してフリー回転可能に取り付け、後部車輪を、後部枠体の下端部に対してフリー回転可能に取り付けた歩行車において、
前記車輪支持部を、
前記前部枠体の下端部に固定した上部支持部材と、前記前部車輪を下端部に軸受した下部支持部材と、該支持部材同士を水平旋回可能に連結する垂直軸と、該下部支持部材に軸受した前部車輪を前記車本体の前後方向と一致する方向に向けた状態に回転固定する車輪固定機構とで構成し、
前記車輪固定機構を、
前記上部支持部材に形成したピン収容部に対して上下動可能に収容した係止ピンと、
前記ピン収容部の下端部に形成した前記係止ピンの下端部の突出を許容するピン突出孔と、
前記係止ピンの下端部が前記ピン突出孔より下方に突出される方向に該係止ピンを付勢するピン付勢手段と、
前記下部支持部材における前記ピン突出孔と対向する部分に形成した前記係止ピンの下端部の係合を許容する係止孔と、
前記ピン収容部より上方に突出した前記係止ピンの上端部に対して上下回動可能に連結され、前記係止ピンの下端部が前記係止孔から抜き取られる固定解除方向に回動操作される操作レバーとで構成した
歩行車の車輪固定機構。 Walking with front wheels attached to the lower end of the front frame in the vehicle body via the wheel support so as to be freely rotatable, and rear wheels attached to the lower end of the rear frame so as to be freely rotatable. In the car,
The wheel support part,
An upper support member fixed to the lower end portion of the front frame, a lower support member bearing the front wheel at the lower end portion, a vertical shaft that connects the support members so as to be horizontally rotatable, and the lower support member A wheel fixing mechanism that rotates and fixes the front wheel bearing in a state in which the front wheel is oriented in a direction that coincides with the longitudinal direction of the vehicle body,
The wheel fixing mechanism,
A locking pin accommodated so as to be movable up and down with respect to the pin accommodating portion formed in the upper support member,
A pin projecting hole that allows the lower end of the locking pin to project at the lower end of the pin housing;
Pin urging means for urging the locking pin in a direction in which a lower end portion of the locking pin protrudes downward from the pin protruding hole;
A locking hole that allows engagement of a lower end of the locking pin formed in a portion of the lower support member that faces the pin protruding hole;
It is connected to an upper end portion of the locking pin protruding upward from the pin accommodating portion so as to be able to rotate up and down, and the lower end portion of the locking pin is operated to rotate in a fixing release direction to be extracted from the locking hole. This is a wheel fixing mechanism for walking vehicles that consists of an operating lever. 前記下部支持部材を、
前記上部支持部材より下方に突出した前記垂直軸の下端部に対して水平旋回可能に取り付けた上部軸受部と、
該上部軸受部に形成した側面から見て斜め下方に延びるとともに、前記前部車輪を軸受する下部軸受部とで構成した
請求項１に記載の歩行車の車輪固定機構。 The lower support member;
An upper bearing portion attached so as to be horizontally rotatable with respect to a lower end portion of the vertical shaft protruding downward from the upper support member;
The wheel fixing mechanism for a walking vehicle according to claim 1, wherein the wheel fixing mechanism includes a lower bearing portion that extends obliquely downward as viewed from a side surface formed in the upper bearing portion and that bears the front wheel. 前記係止ピンを収容した前記ピン収容部、及び前記係止ピンを突出する前記ピン突出孔を、前記車本体の後方側と対応して前記上部支持部材における前記垂直軸の後側に設け、
前記係止ピンの下端部を係合する前記係止孔を、
前記下部支持部材における前記下部軸受部と対応して、前記上部軸受部における前記ピン突出孔と対向する上部周縁部に設けた
請求項１又は２に記載の歩行車の車輪固定機構。 The pin accommodating portion that accommodates the locking pin, and the pin projecting hole that projects the locking pin are provided on the rear side of the vertical shaft in the upper support member corresponding to the rear side of the vehicle body,
The locking hole for engaging the lower end of the locking pin,
The wheel fixing mechanism for a walking vehicle according to claim 1, wherein the wheel fixing mechanism is provided on an upper peripheral edge portion of the upper bearing portion facing the pin projecting hole corresponding to the lower bearing portion of the lower support member. 前記ピン収容部の上端側開口部に、
該上端側開口部を覆う大きさ及び形状に形成した抜止め部材を固定し、
前記抜止め部材に、
前記ピン収容部の上端側開口部と連通して、前記係止ピンの上端部の突出を許容するピン挿通孔を形成し、
前記操作レバーの基端部を、
前記ピン挿通孔より上方に突出した前記係止ピンの上端部に連結するとともに、該基端部に、前記抜止め部材の上面側平坦部分に対して当接されるカム部を形成した
請求項１〜３のいずれか一つに記載の歩行車の車輪固定機構。 In the upper end side opening of the pin accommodating portion,
Fixing a retaining member formed in a size and shape covering the upper end side opening,
In the retaining member,
In communication with the upper end side opening of the pin accommodating portion, a pin insertion hole that allows the upper end of the locking pin to protrude is formed,
The base end of the operation lever
A cam portion that is connected to an upper end portion of the locking pin protruding upward from the pin insertion hole and that abuts against a flat portion on the upper surface side of the retaining member is formed at the base end portion. The wheel fixing mechanism of the walking vehicle as described in any one of 1-3. 前記カム部を、
前記操作レバーを倒伏姿勢に回動した状態において、前記抜止め部材の上面側平坦部分に対して平坦部分を垂直に当接する水平カム部と、
前記操作レバーを起立姿勢に回動した状態において、前記抜止め部材の上面側平坦部分に対して平坦部分を垂直に当接する起立カム部と、
前記水平カム部と前記起立カム部とが成す角隅部に該カム部と連続して形成され、前記操作レバーを倒伏姿勢と起立姿勢に回動操作する際に、前記抜止め部材の上面側平坦部分に対して曲面部分を当接する支点カム部とで構成した
請求項４に記載の歩行車の車輪固定機構。 The cam portion,
In a state where the operating lever is rotated to the lying posture, a horizontal cam portion that vertically contacts the flat portion with respect to the flat portion on the upper surface side of the retaining member;
In a state where the operation lever is rotated to a standing posture, a standing cam portion that vertically contacts a flat portion with respect to a flat portion on the upper surface side of the retaining member;
An upper surface side of the retaining member is formed at a corner portion formed by the horizontal cam portion and the standing cam portion so as to be continuous with the cam portion, and when the operation lever is rotated to a lying posture and a standing posture. The wheel fixing mechanism for a walking vehicle according to claim 4, comprising a fulcrum cam portion that abuts the curved portion against the flat portion. 前記操作レバーの遊端側に、
該操作レバーを回動操作する操作部を形成するとともに、
該操作部を、前記垂直軸の上端部に螺合した戻止めナット、あるいは、該戻止めナットに装着したナットキャップの外面を覆う大きさ及び形状に形成した
請求項１〜５のいずれか一つに記載の歩行車の車輪固定機構。 On the free end side of the operation lever,
While forming an operation portion for rotating the operation lever,
The operation portion is formed in a size and shape that covers an outer surface of a detent nut screwed to an upper end portion of the vertical shaft or a nut cap attached to the detent nut. The wheel fixing mechanism of the walking vehicle as described in one.
JP2014006375U 2014-12-02 2014-12-02 Wheel fixing mechanism for walking cars Expired - Fee Related JP3196047U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110063847A (en) * 2018-01-24 2019-07-30 纬创资通股份有限公司 Mobile carrier
JP2020200034A (en) * 2019-06-13 2020-12-17 ワンダーランド スイツァーランド アーゲー Wheeled carrying apparatus
CN112477965A (en) * 2019-09-11 2021-03-12 明门瑞士股份有限公司 Children's carrier

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110063847A (en) * 2018-01-24 2019-07-30 纬创资通股份有限公司 Mobile carrier
JP2020200034A (en) * 2019-06-13 2020-12-17 ワンダーランド スイツァーランド アーゲー Wheeled carrying apparatus
KR20210008868A (en) * 2019-06-13 2021-01-25 원더랜드 스위처랜드 아게 Wheeled transport device
JP7233398B2 (en) 2019-06-13 2023-03-06 ワンダーランド スイツァーランド アーゲー Conveyor with wheels
US11993302B2 (en) 2019-06-13 2024-05-28 Wonderland Switzerland Ag Wheeled carrying apparatus
CN112477965A (en) * 2019-09-11 2021-03-12 明门瑞士股份有限公司 Children's carrier
US11358624B2 (en) 2019-09-11 2022-06-14 Wonderland Switzerland Ag Wheeled carrying apparatus
US11987281B2 (en) 2019-09-11 2024-05-21 Wonderland Switzerland Ag Wheeled carrying apparatus

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