JP5366897B2

JP5366897B2 - Trolley

Info

Publication number: JP5366897B2
Application number: JP2010157485A
Authority: JP
Inventors: 弘蔵上垣内
Original assignee: 先進金属工業株式会社
Priority date: 2010-07-12
Filing date: 2010-07-12
Publication date: 2013-12-11
Anticipated expiration: 2030-07-12
Also published as: JP2012020588A

Abstract

<P>PROBLEM TO BE SOLVED: To provide a carriage which has a simple structure, can be reduced in manufacturing cost and can be operated easily. <P>SOLUTION: The carriage 1 has casters 4 which are attached to the front and back sides and the left and right sides of a base frame 3, and which lock a wheel 22 by energizing a lock member 29 to the lower side with a spring 31 and unlock the wheel by pulling-up a lock member-pulling-up shaft 8 against the spring 31. The casters 4 are attached to the front and back parts of each of left and right longitudinal frames 5 of the base frame 3, an actuation frame 7 is retained freely vertically movably within each longitudinal frame 5, the lock member-pulling-up shaft 8 of each caster 4 is fixed to the actuation frame 7, a pedal shaft 10 to which a pedal 9 is projectingly provided is bridged between front end parts of both longitudinal frames 5, 5, a plurality of cam shafts 11, 12 which are integrally connected with each other are horizontally laid on the back side of the pedal shaft 10, rotors 13 attached to both end parts of each cam shafts 11, 12 are interposed between the longitudinal frame 5 and the actuation frame 7 and a slider crank mechanism 14 is interposed between the pedal shaft 10 and the front side cam shaft 11. <P>COPYRIGHT: (C)2012,JPO&INPIT

Description

本発明は、主として病室用床頭台（病床のそばに置いて使う、引き出しや戸棚の付いた台で、患者の日用品を入れたり、テーブルの代りにも使用される）や病室用小型ロッカー等を移動可能に設置するのに使用される台車に関するもので、特に、ベースフレームの前後左右に取り付けてあるキャスターを、１つのペダルの操作でロック及びロック解除するようにした台車に関する。 The present invention mainly relates to a bedtop for a hospital room (a table with drawers and cupboards that is used near a hospital bed and is used for a patient's daily necessities or in place of a table), a small locker for a hospital room, etc. In particular, the present invention relates to a carriage in which casters attached to the front, rear, left and right of a base frame are locked and unlocked by operating one pedal.

従来、病院等で使用される移動式ベッド用台車として種々のものが提案されているが、それらの台車は構造がかなり複雑で部品点数が多く、製作コストが高くつくため、ベッドより小型である病室用床頭台や小型ロッカー等の台車に適用することは、台車のコストが高くなって、不適当であった。 Conventionally, various types of carts for mobile beds used in hospitals and the like have been proposed, but these carts are much more complicated in structure, have a large number of parts, and are expensive to manufacture, so they are smaller than beds. Applying it to carts such as bedside beds for hospital rooms and small lockers has been inappropriate due to the high cost of the carts.

本発明は、構造が簡単で部品点数が少なく、製作コストを安くできると共に、キャスターのロック及びロック解除操作を容易に行える台車を提供することを目的としている。 An object of the present invention is to provide a carriage that has a simple structure, has a small number of parts, can be manufactured at low cost, and can be easily locked and unlocked by casters.

上記課題を解決するための手段を、後述する実施形態の参照符号を付して説明すると、請求項１に係る発明は、ロック部材２９をバネ３１で下方へ付勢させることにより車輪２２をロックし、バネ３１に抗してロック部材引き上げ軸８を引き上げることによりロック解除するようにしたキャスター４を、ベースフレーム３の前後左右に取り付けてなる台車１であって、ベースフレーム３の左右各長手枠５の前後部にキャスター４を取り付け、各長手枠５内にロック部材引き上げ用の作動枠７を上げ下げ自在に保持すると共に、この作動枠７には各キャスター４のロック部材引き上げ軸８の上端部を固定し、左右両長手枠５，５の前端部間にはペダル９を突設したペダル軸１０を軸架し、ペダル軸１０の後方には所要間隔をおいて相互に一体に連結した複数のカム軸１１，１２を左右両長手枠５，５間に横架して、各カム軸１１，１２の両端部に取り付けた転子１３を長手枠５と作動枠７との間に介在させ、ペダル軸１０と前部側カム軸１１との間にスライダクランク機構１４を介装し、ペダル９の上向き傾斜姿勢において、各転子１３が作動枠７の下面側に設けたカム１５の凸部１６に位置して作動枠７が持ち上がり、それによりロック部材引き上げ軸８を引き上げて各キャスター４をロック解除し、ペダル９を踏み込むことにより、各転子１３をカム１５の凸部１６から凹部１７へ移動させて作動枠７を降下させ、ロック部材引き上げ軸８を前記バネ３１の付勢力で引き下げて、各キャスター４をロックするようにしたことを特徴とする。 Means for solving the above problems will be described with reference numerals in the embodiments described later. The invention according to claim 1 locks the wheel 22 by urging the lock member 29 downward with a spring 31. The caster 4 is attached to the front, rear, left, and right of the base frame 3 by lifting the lock member lifting shaft 8 against the spring 31. The casters 4 are attached to the front and rear portions of the frame 5, and the operation frames 7 for lifting the lock members are held up and down in the respective longitudinal frames 5, and the upper ends of the lock member lifting shafts 8 of the casters 4 are held in the operation frames 7. The pedal shaft 10 with a pedal 9 projecting between the front end portions of the left and right longitudinal frames 5 and 5 is pivoted, and the pedal shaft 10 is integrated with each other at a predetermined interval behind the pedal shaft 10. A plurality of connected camshafts 11 and 12 are horizontally mounted between the left and right longitudinal frames 5 and 5, and a trochanter 13 attached to both ends of each camshaft 11 and 12 is disposed between the longitudinal frame 5 and the operation frame 7. A cam in which a slider crank mechanism 14 is interposed between the pedal shaft 10 and the front cam shaft 11 and each trochanter 13 is provided on the lower surface side of the operating frame 7 in the upward inclined posture of the pedal 9. 15, the operating frame 7 is lifted, thereby lifting the lock member lifting shaft 8 to unlock each caster 4, and depressing the pedal 9, thereby causing each trochanter 13 to protrude from the cam 15. The operating frame 7 is moved down from 16 to the recess 17 and the lock member lifting shaft 8 is pulled down by the urging force of the spring 31 to lock each caster 4.

請求項２は、請求項１に記載の台車において、ベースフレーム３の左右各長手枠５は、断面上向きコ字状の枠本体部１９と、枠本体部１９の両側壁部１９ａ，１９ａから夫々外向き水平に突設されたビス孔２６付き支持フランジ部２０，２０とからなり、ロック部材引き上げ用の作動枠７は、長手枠５の枠本体部１９内に上げ下げ自在に嵌合するように断面下向きコ字枠状に形成されていることを特徴とする According to a second aspect of the present invention, in the carriage according to the first aspect, the left and right longitudinal frames 5 of the base frame 3 are respectively formed from a frame main body portion 19 having a U-shaped cross-section upward and both side wall portions 19 a and 19 a of the frame main body portion 19. It comprises support flange portions 20 and 20 with screw holes 26 projecting horizontally outward, and the operating frame 7 for lifting the lock member is fitted into the frame main body portion 19 of the longitudinal frame 5 so as to be freely raised and lowered. It is formed in the shape of a U-shaped frame with a downward cross-section.

上記解決手段による発明の効果を、後述する実施形態の参照符号を付して説明すると、請求項１に係る発明の台車によれば、ペダル９を踏み込むことによって、ベースフレーム３の前後左右に取り付けた４つのキャスター４・・・を一斉にロック状態とすることができ、またペダル９を蹴り上げて上向き傾斜姿勢にすることによって、全てのキャスター４・・・を一斉にロック解除することができる。またこの台車１は、前後左右にキャスター４を装備したベースフレーム３と、ベースフレーム３の左右両長手枠５，５間の前端部間に横架されるペダル軸１０と、これの後方で両長手枠５，５間に横架されるカム軸１１，１２と、ペダル軸１０と前部側カム軸１１との間に介装されるスライダクランク機構１４と、各長手枠５間に上げ下げ自在に配置される作動枠７と、作動枠７の下面側に設けられるカム１５と、各カム軸１１，１２の両端部に取り付けられ、カム１５に沿って移動する転子１３とからなるもので、構造が簡単で部品点数が少ないから、製作コストを安くできると共に、キャスター４のロック及びロック解除操作を容易に行うことができる。 The effect of the invention by the above-described solution means will be described with reference numerals of the embodiments described later. According to the cart of the invention according to claim 1, the base frame 3 is attached to the front, rear, left and right by depressing the pedal 9. The four casters 4... Can be locked all at once, and all the casters 4... Can be unlocked all at once by kicking up the pedal 9 and tilting upward. . The carriage 1 also includes a base frame 3 equipped with casters 4 on the front, rear, left and right, a pedal shaft 10 laid between the front end portions of the left and right longitudinal frames 5 and 5 of the base frame 3, and both The camshafts 11 and 12 that are horizontally mounted between the longitudinal frames 5 and 5, the slider crank mechanism 14 that is interposed between the pedal shaft 10 and the front camshaft 11, and the longitudinal frames 5 can be raised and lowered freely. And the cam 15 provided on the lower surface side of the operating frame 7, and the trochanter 13 attached to both ends of each of the cam shafts 11 and 12 and moving along the cam 15. Since the structure is simple and the number of parts is small, the manufacturing cost can be reduced, and the caster 4 can be easily locked and unlocked.

請求項２に係る発明によれば、ベースフレーム３の左右各長手枠５は、断面上向きコ字状の枠本体部１９と、この枠本体部１９の両側壁部１９ａ，１９ａから夫々外向き水平に突設されたビス孔２６付き支持フランジ部２０，２０とからなり、ロック部材引き上げ用の作動枠７は、長手枠５の枠本体部１９内に上げ下げ自在に嵌合するように断面下向きコ字枠状に形成されている According to the second aspect of the present invention, the left and right longitudinal frames 5 of the base frame 3 are respectively formed horizontally outwardly from the frame main body portion 19 having an upward U-shaped cross section and the side wall portions 19 a and 19 a of the frame main body portion 19. The operating frame 7 for lifting the lock member is formed in a downward-facing cross-section so that it can be raised and lowered into the frame main body 19 of the longitudinal frame 5. It is formed in a frame shape

本発明に係る台車の使用状態を示す外観斜視図である。It is an external appearance perspective view which shows the use condition of the trolley | bogie which concerns on this invention. 本発明に係る台車を示す斜視図である。It is a perspective view which shows the trolley | bogie which concerns on this invention. 同台車の一部を示す縦断側面図である。It is a vertical side view which shows a part of the cart. 同台車の特にカム、転子及びスライダクランク機構部分を示す縦断側面図である。It is a vertical side view which shows especially a cam, a trochanter, and a slider crank mechanism part of the cart. (a) は台車へのキャスターの取付構造部分の正面図で、キャスターがロックされている状態を示し、(b) はそ縦断側面図である。(a) is the front view of the caster attachment structure part to a trolley | bogie, the state which shows the caster being locked is shown, (b) is the longitudinal section side view. (a) は台車へのキャスターの取付構造部分の正面図で、キャスターがロック解除されている状態を示し、(b) はそ縦断側面図である。(a) is the front view of the caster attachment structure part to a trolley | bogie, the state which the caster is unlocked is shown, (b) is the longitudinal section side view. (a) はキャスターがロックされている状態の拡大断面図、(b) はキャスターがロック解除されている状態の拡大断面図、(c) は車輪の旋回ロック手段の一部を示す拡大斜視図である。(a) is an enlarged cross-sectional view in a state where the caster is locked, (b) is an enlarged cross-sectional view in a state where the caster is unlocked, and (c) is an enlarged perspective view showing a part of the turning lock means of the wheel. It is.

以下に本発明の好適な一実施形態を図面に基づいて説明すると、図１において、１は本発明に係る台車、２は台車１に搭載された病室用床頭台で、台本体Ａの正面側下部には扉Ｂ、その上部には引き出しＣ，Ｄが収納配備され、引き出しＣの上側には棚Ｅが設けられている。図２に示す台車１は、ベースフレーム３と、後述するようなロック機構を内蔵し、ベースフレーム３の前後左右に取り付けられた４つのキャスター４・・・とを有する。ベースフレーム３は、左右一対の長手枠５，５と、両長手枠５，５をつなぐ連結枠６とからなる。 A preferred embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a cart according to the present invention, 2 is a floor head for a hospital room mounted on the cart 1, and the front of the base body A A door B is housed in the lower part of the side, and drawers C and D are accommodated in the upper part. A shelf E is provided on the upper side of the drawer C. The cart 1 shown in FIG. 2 includes a base frame 3 and four casters 4 which incorporate a lock mechanism as will be described later and are attached to the front, rear, left and right of the base frame 3. The base frame 3 includes a pair of left and right longitudinal frames 5, 5 and a connecting frame 6 that connects the both longitudinal frames 5, 5.

台車１は、ベースフレーム３を構成する左右各長手枠５の前後部にキャスター４を取り付け、各長手枠５内に、これと同じく長尺状のロック部材引き上げ用の作動枠７を上げ下げ自在に保持すると共に、作動枠７には各キャスター４のロック部材引き上げ軸８の上端部を固定し、左右両長手枠５，５の前端部間にはペダル９を突設したペダル軸１０を軸架し、このペダル軸１０の後方には所要間隔をおいて相互に一体に連結した前部側と後部側の２つのカム軸１１，１２を左右両長手枠５，５間に横架し、各カム軸１１，１２の夫々両端部に取り付けた転子１３を長手枠５と作動枠７との間に介在させ、ペダル軸１０と前部側カム軸１１の間にスライダクランク機構１４を介装し、ペダル９の上向き傾斜姿勢において、各転子１３が作動枠７の下面側に設けたカム１５の凸部１６に位置して作動枠７が持ち上がり、それによりロック部材引き上げ軸８を引き上げて各キャスター４をロック解除し、ペダル９を踏むことにより、各転子１３がカム１５の凸部１６から凹部１７へ移動して、キャスター４に設けてあるコイルバネ３１の付勢力により作動枠７を引き下げ、ロック部材引き上げ軸８を引き下げて、各キャスター４をロックするようにしたものである。 The carriage 1 has casters 4 attached to the front and rear portions of the left and right longitudinal frames 5 constituting the base frame 3, and the long operation members 7 for lifting the locking members can be raised and lowered in the respective longitudinal frames 5. At the same time, the upper end of the lock member lifting shaft 8 of each caster 4 is fixed to the operation frame 7, and a pedal shaft 10 with a pedal 9 protruding between the front end portions of the left and right longitudinal frames 5, 5 is pivoted. Then, behind the pedal shaft 10, two cam shafts 11 and 12 on the front side and the rear side, which are integrally connected to each other with a predetermined interval, are horizontally mounted between the left and right longitudinal frames 5 and 5, respectively. A trochanter 13 attached to each end of each of the cam shafts 11 and 12 is interposed between the longitudinal frame 5 and the operation frame 7, and a slider crank mechanism 14 is interposed between the pedal shaft 10 and the front cam shaft 11. In the upward inclined posture of the pedal 9, each trochanter 13 is moved to the operating frame 7. The operating frame 7 is lifted by being positioned on the convex portion 16 of the cam 15 provided on the lower surface side, thereby pulling up the lock member lifting shaft 8 to unlock each caster 4 and depressing the pedal 9, thereby each trochanter 13. Is moved from the convex portion 16 of the cam 15 to the concave portion 17, the operating frame 7 is pulled down by the urging force of the coil spring 31 provided on the caster 4, and the lock member lifting shaft 8 is pulled down to lock each caster 4. It is a thing.

ベースフレーム３の左右各長手枠５は、図５，図６から分かるように、断面上向きコ字状の枠本体部１９と、この枠本体部１９の両側壁部１９ａ，１９ａ上端から夫々外向き水平に突設されたビス孔２６付き支持フランジ部２０，２０とからなり、枠本体部１９は、両側壁部１９ａ，１９ａと底壁部１９ｂとからなる。またロック部材引き上げ用の作動枠７は、長手枠５の枠本体部１９内に上げ下げ自在に嵌合するように、両側壁部７ａ，７ａと上壁部７ｂとによって断面下向きコ字枠状に形成されている。 As shown in FIGS. 5 and 6, the left and right longitudinal frames 5 of the base frame 3 are respectively outward outward from the upper ends of the frame main body 19 and the upper side walls 19 a and 19 a of the frame main body 19. The frame main body portion 19 includes side wall portions 19a and 19a and a bottom wall portion 19b. Further, the operating frame 7 for lifting the lock member is formed into a U-shaped frame having a downward cross section by both side wall portions 7a and 7a and the upper wall portion 7b so as to be able to be raised and lowered in the frame main body portion 19 of the longitudinal frame 5. Is formed.

次に、キャスター４の構造及及びそのロック機構について、図５〜図７を参照しながら説明する。キャスター４は、ヨーク部２１と、このヨーク部２１に車軸２３によって回転自在に軸着された左右一対の車輪２２，２２と、ヨーク部２１の進行方向前方側に設けてある取付孔２４内に回転自在に挿入された、中空状のボルトからなる竪軸２５とを有し、ヨーク部２１は、竪軸２５を中心に３６０°旋回するように竪軸２５に取り付けられている。 Next, the structure of the caster 4 and its locking mechanism will be described with reference to FIGS. The caster 4 is disposed in a yoke portion 21, a pair of left and right wheels 22 and 22 rotatably mounted on the yoke portion 21 by an axle 23, and a mounting hole 24 provided on the front side in the traveling direction of the yoke portion 21. The yoke portion 21 is attached to the flange shaft 25 so as to turn 360 ° around the flange shaft 25.

キャスター４を長手枠５の前後各端部に取り付けるにあたって、竪軸２５は、この上端部を、枠本体部１９の底壁部１９ｂに設けたボルト挿通孔（図示せず）から上向きに所要長さ挿通させ、底壁部１９ｂを挟むように螺合させたナット２７，２８で底壁部１９ｂを締め付けることによって、長手枠５の枠本体部１９に固定されるようになっている When attaching the caster 4 to the front and rear end portions of the longitudinal frame 5, the flange shaft 25 has a required length upward from a bolt insertion hole (not shown) provided in the bottom wall portion 19 b of the frame main body portion 19. The bottom wall portion 19b is fastened with nuts 27 and 28 that are inserted through and screwed so as to sandwich the bottom wall portion 19b, thereby being fixed to the frame main body portion 19 of the longitudinal frame 5.

ヨーク部２１に設けられた取付孔２４の下方部は、ロック部材２９を上下スライド自在に案内するガイド孔３０を形成している。ロック部材２９は、図５，図６に示すように、それ自体に設けてある竪軸挿通孔２９ｏを介して竪軸２５に軸方向スライド自在に挿通されてヨーク部２１のガイド孔３０に上下スライド自在に嵌合された状態で、ヨーク部２１とロック部材２９との間に介装されたコイルバネ３１により下方へ付勢されて、下端部のロック片２９ａが、左右両車輪２２，２２に夫々一定ピッチで周設された係合溝３２に係合し、それによって両車輪２２，２２の回転が阻止されるようになっている。 A lower portion of the mounting hole 24 provided in the yoke portion 21 forms a guide hole 30 that guides the lock member 29 so as to be slidable up and down. As shown in FIGS. 5 and 6, the lock member 29 is inserted into the shaft 25 through the shaft insertion hole 29 o provided on the lock member 29 slidably in the axial direction, and is vertically moved into the guide hole 30 of the yoke portion 21. In a slidably fitted state, it is biased downward by a coil spring 31 interposed between the yoke portion 21 and the lock member 29, and the lock piece 29 a at the lower end portion is applied to the left and right wheels 22, 22. Each is engaged with an engaging groove 32 provided at a constant pitch, thereby preventing the rotation of both wheels 22 and 22.

中空状ボルトからなる竪軸２５にはその中心軸線に沿って、ロック部材引き上げ軸８が貫通していて、その下端部８ｂは、ロック部材２９の竪軸挿通孔２９ｏの下端部に取り付けられる端板３３を貫通突出して、その突出端部に螺着されるナット３４で端板３３を保持し、ロック部材引き上げ軸８の上端部８ａは、長手枠５内に配置された作動枠７の上壁部７ｂを貫通し、横向きに屈曲されて作動枠７に係止されている。しかして、図５の(a) ，(b) に示すように、作動枠７がコイルバネ３１により下方に付勢されてロック片２９ａが車輪２２の係合溝３２に係合して車輪２２の回転を阻止した状態の時に、作動枠７は長手枠５内の下限位置にあって、斯かる状態から図６の(a) ，(b) に示すように、作動枠７をコイルバネ３１の付勢力に抗して持ち上げてロック部材引き上げ軸８を所定高さ引き上げることにより、ロック部材２９のロック片２９ａが車輪２２の係合溝３２から離脱して、車輪２２が回転可能な状態となる。 A lock member lifting shaft 8 passes through the shaft 25 made of a hollow bolt along the center axis thereof, and a lower end portion 8b thereof is an end attached to a lower end portion of the shaft insertion hole 29o of the lock member 29. The end plate 33 is held by a nut 34 that protrudes through the plate 33 and is screwed to the protruding end portion, and the upper end portion 8 a of the lock member lifting shaft 8 is located above the operation frame 7 disposed in the longitudinal frame 5. It penetrates the wall 7b, is bent sideways and is locked to the operating frame 7. 5A and 5B, the operating frame 7 is urged downward by the coil spring 31 and the lock piece 29a engages with the engagement groove 32 of the wheel 22 so that the wheel 22 When the rotation is prevented, the operating frame 7 is at the lower limit position in the longitudinal frame 5. From this state, the operating frame 7 is attached to the coil spring 31 as shown in FIGS. 6 (a) and 6 (b). By lifting the lock member lifting shaft 8 against the force and lifting the lock member lifting shaft 8 to a predetermined height, the lock piece 29a of the lock member 29 is detached from the engagement groove 32 of the wheel 22, and the wheel 22 becomes rotatable.

各キャスター４は、上記のようにロック部材２９がコイルバネ３１で下方へ付勢されて下端部のロック片２９ａが車輪２２の係合溝３２に係合することより、車輪２２の回転が阻止されることになるが、このロック部材２９がコイルバネ３１で下方へ付勢された状態でヨーク部２１の旋回も阻止されるようになっている。即ち、図７の(a) は図５の(b) の一部拡大図、図７の(b) は図６の(b) の一部拡大図であって、これらの図から分かるように、竪軸２５の下端部には例えば直径方向両端部に旋回ロック片３５，３５が突設され、各旋回ロック片３５は、ロック部材２９が下方へ付勢されて車輪２２の回転が阻止された状態においては、図７の(a) 及び同図(c) の実線図示のように、ロック部材２９の竪軸挿通孔２９ｏの下端部内周面の上部側に周方向一定間隔おきに設けられた凹所３６に係合することにより、ロック部材２９の回転を阻止してヨーク部２１の旋回を阻止し、またロック部材２９がロック部材引き上げ軸８により引き上げられて車輪２２のロックが解除された状態では、各旋回ロック片３５は、図７の(b) 及び同図の(c) の仮想線図示のように、竪軸挿通孔２９ｏ下端部内周面の下部側に設けられた環状溝部３７に位置して、ロック部材２９の回転を許し、ヨーク部２１の旋回を可能とするようになっている。 In each caster 4, the lock member 29 is biased downward by the coil spring 31 as described above, and the lock piece 29 a at the lower end engages with the engagement groove 32 of the wheel 22, thereby preventing the rotation of the wheel 22. However, in a state where the lock member 29 is urged downward by the coil spring 31, the yoke portion 21 is also prevented from turning. 7 (a) is a partially enlarged view of FIG. 5 (b), and FIG. 7 (b) is a partially enlarged view of FIG. 6 (b), as can be seen from these drawings. For example, turning lock pieces 35, 35 project from the lower end of the shaft 25 at both ends in the diametrical direction, and each turning lock piece 35 is prevented from rotating the wheel 22 by the lock member 29 being biased downward. In this state, as shown by the solid lines in FIG. 7A and FIG. 7C, the lock member 29 is provided on the upper side of the inner peripheral surface of the lower end portion of the shaft insertion hole 29o at regular intervals in the circumferential direction. By engaging the recess 36, the rotation of the lock member 29 is prevented to prevent the yoke portion 21 from turning, and the lock member 29 is pulled up by the lock member lifting shaft 8 and the lock of the wheel 22 is released. In this state, each swivel lock piece 35 is inserted into the vertical axis as shown in the phantom lines in FIGS. 7 (b) and (c). Located in an annular groove 37 provided on the lower side of the hole 29o lower end inner peripheral surface, allowing rotation of locking member 29, so as to permit pivoting of the yoke 21.

図２〜図４に示すように、ペダル軸１０の両端部は、左右両長手枠５，５の対向側面に夫々固着されたブラケット３８，３８に回転自在に軸架され、このペダル軸１０には平面視コ字状のペダル９が前方へ突出するように固着されている。ペダル９に近い方の前部側カム軸１１と、それより遠い方の後部側カム軸１２とは、長手枠５に沿って延びる左右両スライド杆４０，４０によってカム軸１１，１２の両端部どうしが一体的に連結され、各スライド杆４０は、長手枠５の前後端部に固着された前後ブラケット３８，３９の嵌合凹部３８ａ，３９ａに前後方向スライド自在に支持されている。 As shown in FIGS. 2 to 4, both end portions of the pedal shaft 10 are rotatably mounted on brackets 38, 38 fixed to opposite side surfaces of the left and right longitudinal frames 5, 5, respectively. Is fixed so that a U-shaped pedal 9 is projected forward. The front camshaft 11 closer to the pedal 9 and the rear camshaft 12 farther from the pedal 9 are both end portions of the camshafts 11 and 12 by left and right slide rods 40 and 40 extending along the longitudinal frame 5. The slide rods 40 are integrally connected to each other, and are supported by the fitting recesses 38a and 39a of the front and rear brackets 38 and 39 fixed to the front and rear ends of the longitudinal frame 5 so as to be slidable in the front and rear direction.

ペダル軸１０と前部側カム軸１１の間に介装されるスライダクランク機構１４は、図２及び図４に示すように、基端部がペダル軸１０に固着された揺動クランク４１と、前部側カム軸１１に下向きに一体に突設された取付片４２と、揺動クランク４１の先端部と取付片４２の先端部とにピン４４，４５で枢支連結された連杆４３とからなるもので、揺動クランク４１が図４の実線図示位置から仮想線図示位置まで揺動すると、連杆４３によって取付片４２が同図の実線図示位置から仮想線図示位置へ水平直線運動するから、この取付片４２と一体のカム軸１１が同図の実線図示位置から仮想線図示位置へ水平移動し、これによりカム１５の凹部１７側にあった転子１３がカム１５の凸部１６側に乗り移るようになる。しかして、前部側のカム軸１１と後部側のカム軸１２とはスライド杆４０で一体に連結されているから、前部側の転子１３と後部側の転子１３とが、同時に前後両側のカム１５，１５の凹部１７，１７から凸部１６，１６へ乗り移ることにより、作動枠７を同図の実線図示位置から仮想線図示位置まで持ち上げることになる。 The slider crank mechanism 14 interposed between the pedal shaft 10 and the front camshaft 11 includes, as shown in FIGS. 2 and 4, a swing crank 41 having a base end portion fixed to the pedal shaft 10, A mounting piece 42 integrally projecting downward on the front camshaft 11; a linkage 43 pivotally connected to the tip of the swing crank 41 and the tip of the mounting piece 42 by pins 44 and 45; When the swinging crank 41 swings from the solid line illustrated position in FIG. 4 to the virtual line illustrated position, the attachment piece 42 moves horizontally from the solid line illustrated position in FIG. Accordingly, the cam shaft 11 integrated with the mounting piece 42 moves horizontally from the position shown in the solid line in the drawing to the position shown in the phantom line, so that the trochanter 13 located on the concave portion 17 side of the cam 15 becomes the convex portion 16 of the cam 15. I will change to the side. Since the front camshaft 11 and the rear camshaft 12 are integrally connected by the slide rod 40, the front trochanter 13 and the rear trochanter 13 are simultaneously moved forward and backward. By moving from the concave portions 17 and 17 of the cams 15 and 15 on both sides to the convex portions 16 and 16, the operating frame 7 is lifted from the solid line illustrated position in the figure to the virtual line illustrated position.

また、揺動クランク４１が図４の仮想線図示位置から実線図示位置まで揺動すると、連杆４３によって取付片４２が仮想線図示位置から実線図示位置へと後退して、カム軸１１，１２が同図の仮想線図示位置から実線示位置へ後退し、これにより各カム１５の凸部１６側にあった各転子１３が凹部１７側に移るから、作動枠７は同図の仮想線図示位置から降下して実線図示位置の状態となる。このスライダクランク機構１４は、ペダル９の踏み込み・蹴り上げ操作によるペダル軸１０の回転によって、揺動クランク４１を揺動させるようにしている。 Further, when the swinging crank 41 swings from the phantom line illustrated position in FIG. 4 to the solid line illustrated position, the attachment piece 42 is retracted from the phantom line illustrated position to the solid line illustrated position by the linkage 43, and the camshafts 11, 12 are moved. Is retracted from the position shown in the phantom line to the position shown in the solid line, whereby each trochanter 13 on the convex portion 16 side of each cam 15 moves to the concave portion 17 side. It descends from the illustrated position to the state shown by the solid line. The slider crank mechanism 14 swings the swing crank 41 by the rotation of the pedal shaft 10 by the depression / pick-up operation of the pedal 9.

次に、上述したような構成よりなる台車１の使用について説明すると、この台車１は、図１，図２及び図４に示すようにペダル９が水平姿勢にある時は、各キャスター４がロックされている状態にあって、その位置に停止されている。 Next, the use of the carriage 1 having the above-described configuration will be described. The carriage 1 is configured such that each caster 4 is locked when the pedal 9 is in a horizontal position as shown in FIGS. Is in a stopped state and stopped at that position.

いま、ペダル９を図４に実線で示す水平姿勢から蹴り上げて同図仮想線図示のような上向き傾斜姿勢にすると、ペダル軸１０がペダル９の蹴り上げ角度に対応する角度回転し、このペダル軸１０の回転により、スライダクランク機構１４を介してカム軸１１，１２が図４の実線図示位置から仮想線図示位置へ水平移動し、これによりカム１５の凹部１７側にあった転子１３がカム１５の凸部１６側に乗り移って、左右両長手枠５，５内の作動枠７，７を図４の実線図示位置から仮想線図示位置まで持ち上げ、それによって前後左右各キャスター４のロック部材引き上げ軸８を引き上げる。 Now, when the pedal 9 is kicked up from the horizontal posture shown by the solid line in FIG. 4 to the upward inclined posture as shown in the phantom line in FIG. 4, the pedal shaft 10 rotates by an angle corresponding to the kicking angle of the pedal 9. The rotation of the shaft 10 causes the cam shafts 11 and 12 to move horizontally from the position indicated by the solid line in FIG. 4 to the position indicated by the phantom line via the slider crank mechanism 14. Transfering to the convex portion 16 side of the cam 15, the operating frames 7, 7 in the left and right longitudinal frames 5, 5 are lifted from the solid line illustrated position in FIG. 4 to the phantom line illustrated position. Pull up the lifting shaft 8.

各キャスター４は、コイルバネ３１でロック部材２９が下方へ付勢されていることにより、ロック片２９ａが車輪２２の係合溝３２に係合して車輪２２の回転が阻止されると共に、竪軸２５の旋回ロック片３５がロック部材２９の凹所３６に係合して車輪２２（ヨーク部２１）の旋回が阻止されたロック状態（図５及び図７の(a) 参照）にあるが、ロック部材引き上げ軸８を所定高さ引き上げることによってロック解除されるから、上記のように左右両長手枠５，５内の作動枠７，７が持ち上がって、各キャスター４のロック部材引き上げ軸８を引き上げることにより、各キャスター４はロック解除される。 Each of the casters 4 has the lock member 29 urged downward by the coil spring 31 so that the lock piece 29a engages with the engagement groove 32 of the wheel 22 to prevent the wheel 22 from rotating. In the locked state (see FIG. 5 and FIG. 7 (a)), the turning lock pieces 35 of 25 are engaged with the recesses 36 of the lock member 29 and the turning of the wheels 22 (yoke part 21) is prevented. Since the lock is released by raising the lock member lifting shaft 8 to a predetermined height, the operation frames 7 and 7 in the left and right longitudinal frames 5 and 5 are lifted as described above, and the lock member lifting shaft 8 of each caster 4 is lifted. By pulling up, each caster 4 is unlocked.

また、ペダル９が図４の仮想線図示のような上向き傾斜姿勢となって各キャスター４がロック解除されている状態から、ペダル９を踏み込むと、ペダル軸１０が逆方向に回転して、スライダクランク機構１４を介してカム軸１１，１２が図４の仮想線図示位置から実線図示位置へ水平移動し、これによりカム１５の凸部１６側にあった転子１３が凹部１７側に移って、作動枠７，７が図４の仮想線図示位置から実線図示位置まで降下し、それにより各キャスター４のロック部材引き上げ軸８が引き下げられ、ロック部材２９はコイルバネ３１の付勢力により押し下げられて、車輪２２の回転及び旋回が阻止されたロック状態となる。 Further, when the pedal 9 is depressed from the state in which the caster 4 is in the upward inclined posture as shown by the phantom line in FIG. 4 and each caster 4 is unlocked, the pedal shaft 10 rotates in the reverse direction, and the slider The camshafts 11 and 12 move horizontally from the phantom line illustrated position in FIG. 4 to the solid line illustrated position via the crank mechanism 14, whereby the trochanter 13 on the convex portion 16 side of the cam 15 moves to the concave portion 17 side. The operating frames 7 and 7 are lowered from the phantom line illustrated position in FIG. 4 to the solid line illustrated position, whereby the lock member lifting shaft 8 of each caster 4 is pulled down, and the lock member 29 is pushed down by the biasing force of the coil spring 31. The wheel 22 is locked and prevented from rotating and turning.

以上説明したように、この台車１にあっては、ペダル９を踏み込むことによって、前後左右の４つ全てのキャスター４・・・を一斉にロック状態とすることができ、またペダル９を蹴り上げて上向き傾斜姿勢にすることによって、全てのキャスター４・・・を一斉にロック解除することができる。また、この台車１は、前後左右にキャスター４を装備したベースフレーム３と、このベースフレーム３の左右両長手枠５，５間の前端部間に横架される前部側ペダル軸１０と、これの後方で両長手枠５，５間に横架される後部側カム軸１１，１２と、前部側ペダル軸１０と前部側カム軸１１との間に介装されるスライダクランク機構１４と、各長手枠５内に上げ下げ自在に嵌合配置される作動枠７と、この作動枠７の下面側に設けられたカム１５と、各カム軸１１，１２の両端部に取り付けられ、カム１５に沿って移動する転子１３とからなるもので、構造が簡単で、部品点数が少ないから、台車１の製作コストを安くできると共に、キャスター４のロック及びロック解除操作を容易に行うことができる。 As described above, in this cart 1, by depressing the pedal 9, all four casters 4, front, rear, left and right can be locked simultaneously, and the pedal 9 is kicked up. All the casters 4... Can be unlocked all at once by using the upward inclined posture. Further, the carriage 1 includes a base frame 3 equipped with casters 4 on the front, rear, left and right, a front pedal shaft 10 horizontally mounted between front end portions between the left and right longitudinal frames 5 and 5 of the base frame 3, Behind this, rear camshafts 11 and 12 that are horizontally mounted between the two longitudinal frames 5 and 5, and a slider crank mechanism 14 that is interposed between the front pedal shaft 10 and the front camshaft 11. And an operating frame 7 fitted and disposed in each longitudinal frame 5 so as to be freely raised and lowered, a cam 15 provided on the lower surface side of the operating frame 7, and attached to both ends of each of the cam shafts 11 and 12, Since the structure is simple and the number of parts is small, the production cost of the carriage 1 can be reduced, and the caster 4 can be easily locked and unlocked. it can.

この台車１に図１に例示するような病室用床頭台２を搭載設置するには、この床頭台２を、ベースフレーム３を形成する左右両長手枠５，５の上に載置し、各長手枠５の支持フランジ部２０に設けてあるビス孔２６よりビス（図示せず）を床頭台２の底面側にねじ込むことによって、床頭台２を固定させることができる。 In order to mount and install a floor pedestal 2 for a hospital room as illustrated in FIG. 1 on the carriage 1, the floor pedestal 2 is placed on both left and right longitudinal frames 5, 5 forming a base frame 3. The floor head base 2 can be fixed by screwing a screw (not shown) into the bottom surface side of the floor head base 2 from a screw hole 26 provided in the support flange portion 20 of each longitudinal frame 5.

また、この台車１では、ベースフレーム３の左右各長手枠５は、断面上向きコ字状の枠本体部１９と、この枠本体部１９の両側壁部１９ａ，１９ａから夫々外向き水平に突設された支持フランジ部２０，２０とからなり、ロック部材引き上げ用の作動枠７は、長手枠５の枠本体部１９内に上げ下げ自在に嵌合するように断面下向きコ字枠状に形成されているから、長尺物の作動枠７を長手枠５内に上げ下げ自在に的確に保持させることができ、また病室用床頭台や小型ロッカー等を搭載する際には、その搭載物を両長手枠５，５の夫々支持フランジ部２０，２０上に載置して、支持フランジ部２０に設けてあるビス孔２６より搭載物の底面側にビスをねじ込むようにすることによって、搭載物を迅速容易に且つ安定状態に載置固定することができる。 Further, in this carriage 1, the left and right longitudinal frames 5 of the base frame 3 project outwardly and horizontally from a frame main body portion 19 having an upward U-shaped cross section and both side wall portions 19 a and 19 a of the frame main body portion 19. The operating frame 7 for lifting the lock member is formed in a U-shaped frame with a downward cross section so that it can be freely raised and lowered into the frame body 19 of the longitudinal frame 5. Therefore, the operation frame 7 of the long object can be lifted and lowered in the longitudinal frame 5 and can be held accurately, and when mounting a floor head stand for a hospital room, a small locker, etc. By placing the screws on the support flange portions 20 and 20 of the frames 5 and 5 and screwing the screws to the bottom surface side of the load from the screw holes 26 provided in the support flange portion 20, the load can be quickly made. Easy and stable mounting and fixing Kill.

１台車
２病室用床頭台等の搭載物
３ベースフレーム
４キャスター
５長手枠
８ロック部材引き上げ軸
９ペダル
１０ペダル軸
１１，１２カム軸
１３転子
１４スライダクランク機構
１５カム
１６凸部
１７凹部
３１コイルバネ
DESCRIPTION OF SYMBOLS 1 Carriage 2 Mounted objects, such as a floor head stand for patient rooms 3 Base frame 4 Caster 5 Long frame 8 Locking member raising shaft 9 Pedal 10 Pedal shaft 11, 12 Cam shaft 13 Trochanter 14 Slider crank mechanism 15 Cam 16 Convex part 17 Concave part
31 Coil spring

Claims

ロック部材をバネで下方へ付勢させることにより車輪をロックし、バネに抗してロック部材引き上げ軸を引き上げることによりロック解除するようにしたキャスターを、ベースフレームの前後左右に取り付けてなる台車であって、ベースフレームの左右各長手枠の前後部にキャスターを取り付け、各長手枠内にロック部材引き上げ用の作動枠を上げ下げ自在に保持すると共に、この作動枠には各キャスターのロック部材引き上げ軸の上端部を固定し、左右両長手枠の前端部間にはペダルを突設したペダル軸を軸架し、ペダル軸の後方には所要間隔をおいて相互に一体に連結した複数のカム軸を左右両長手枠間に横架して、各カム軸の両端部に取り付けた転子を長手枠と作動枠との間に介在させ、ペダル軸と前部側カム軸との間にスライダクランク機構を介装し、ペダルの上向き傾斜姿勢において、各転子が作動枠の下面側に設けたカムの凸部に位置して作動枠が持ち上がり、それによりロック部材引き上げ軸を引き上げて各キャスターをロック解除し、ペダルを踏み込むことにより、各転子をカムの凸部から凹部へ移動させて作動枠を降下させ、ロック部材引き上げ軸を前記バネの付勢力で引き下げて、各キャスターをロックするようにした台車。 It is a cart that has casters attached to the front, back, left, and right of the base frame that lock the wheels by urging the lock member downward with a spring and unlocking the lock member by pulling up the lock member lifting shaft against the spring. The casters are attached to the front and rear portions of the left and right longitudinal frames of the base frame, and the operation frames for lifting the lock members are held up and down freely in the respective longitudinal frames. A plurality of camshafts that are fixedly connected to each other with a predetermined interval between the pedal shafts and a pedal shaft projecting between the front end portions of the left and right longitudinal frames. Are placed between the left and right longitudinal frames, and a trochanter attached to each end of each camshaft is interposed between the longitudinal frame and the operating frame, and the slider clutch is placed between the pedal shaft and the front camshaft. In the upward inclined posture of the pedal, the operating frame is lifted by the trochanter being located on the convex portion of the cam provided on the lower surface side of the operating frame, thereby lifting the lock member lifting shaft and Is unlocked and the pedal is depressed to move each trochanter from the convex part of the cam to the concave part to lower the operating frame, and the lock member lifting shaft is lowered by the biasing force of the spring to lock each caster. A dolly like that.

ベースフレームの左右各長手枠は、断面上向きコ字状の枠本体部と、枠本体部の両側壁部から夫々外向き水平に突設されたビス孔付き支持フランジ部とからなり、ロック部材引き上げ用の作動枠は、長手枠の枠本体部内に上げ下げ自在に嵌合するように断面下向きコ字枠状に形成されている請求項１に記載の台車。 Each of the left and right longitudinal frames of the base frame is composed of a frame body portion with an upward U-shaped cross section and support flange portions with screw holes projecting horizontally outward from both side wall portions of the frame body portion. 2. The carriage according to claim 1, wherein the working frame is formed into a U-shaped frame having a downward cross-section so as to be fitted in the frame main body portion of the longitudinal frame so as to be freely raised and lowered.