JPH0646950Y2 - Self-propelled boom aerial work vehicle fall prevention device - Google Patents
Self-propelled boom aerial work vehicle fall prevention deviceInfo
- Publication number
- JPH0646950Y2 JPH0646950Y2 JP9044691U JP9044691U JPH0646950Y2 JP H0646950 Y2 JPH0646950 Y2 JP H0646950Y2 JP 9044691 U JP9044691 U JP 9044691U JP 9044691 U JP9044691 U JP 9044691U JP H0646950 Y2 JPH0646950 Y2 JP H0646950Y2
- Authority
- JP
- Japan
- Prior art keywords
- boom
- fall prevention
- self
- work vehicle
- aerial work
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Harvesting Machines For Specific Crops (AREA)
- Forklifts And Lifting Vehicles (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本考案は、高所作業、特に果樹栽
培に使用する自走式ブーム高所作業車の転倒防止装置に
係るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fall prevention device for a self-propelled boom aerial work vehicle used for aerial work, particularly fruit cultivation.
【０００２】[0002]
【従来の技術及び考案が解決しようとする課題】従来、
自走式ブーム高所作業車は、ブームを起立して作業台を
高くしたり、旋回角度を小さくして機体の側方に大きく
ハングしたりすると、機体が不安定になり易く、転倒す
る恐れがあった。[Prior Art and Problems to be Solved by the Invention]
Self-propelled boom aerial platforms are prone to instability and may tip over if the boom is raised to raise the work platform or the turning angle is reduced to a large hang on the side of the aircraft. was there.
【０００３】そのため、機体にアウトリガ状のものを付
設したり、油圧を利用してブームの旋回側の車輪列を側
方に引き出してトレッド寸法を大きくしたりして、機体
の転倒を防いでいたが、これらの方法は従来の機体にこ
れらの機構を付加せねばならないので構造が複雑になり
コストが高くなる上に、作業の面でも煩わしい作業であ
った。Therefore, an outrigger-like body is attached to the machine body, or the wheel train on the turning side of the boom is pulled out to the side by utilizing hydraulic pressure to increase the tread size, thereby preventing the machine body from tipping over. However, in these methods, since these mechanisms must be added to the conventional machine body, the structure becomes complicated and the cost becomes high, and also the work is troublesome.
【０００４】本考案は、これらの問題を解決し、安全に
しかも経済的な機体の転倒防止装置を提供するものであ
る。The present invention solves these problems and provides a safe and economical device for preventing the body from tipping over.
【０００５】[0005]
【課題を解決するための手段】添付図面を参照して本考
案の要旨を説明する。The gist of the present invention will be described with reference to the accompanying drawings.
【０００６】機体１にブーム体２を介して作業台３を上
下に対して起伏自在に、左右に対して旋回自在に配設し
た自走式ブーム高所作業車において、機体１の後部左右
に転倒防止フレーム４Ｌ・４Ｒの基部４Ｌ'・４Ｒ'を枢
着して夫々の先端を外側に回動自在に設け、この夫々の
転倒防止フレーム４Ｌ・４Ｒの基部４Ｌ'・４Ｒ'にブー
ム体２の旋回側の転倒防止フレーム４Ｌ・４Ｒの先端が
ブーム体２の旋回角度に追従して前記基部４Ｌ'・４Ｒ'
を支点として回動する回動追従機構５Ｌ・５Ｒを設けた
ことを特徴とする自走式ブーム高所作業車の転倒防止装
置に係るものである。[0006] In a self-propelled boom aerial work vehicle in which a work platform 3 is erected up and down from the body 1 via a boom body 2 and rotatable to the left and right, the left and right rear parts of the body 1 are provided. The bases 4L 'and 4R' of the fall prevention frames 4L and 4R are pivotally attached to each other so that the respective tips are rotatably provided outside, and the boom 2 is attached to the bases 4L 'and 4R' of the fall prevention frames 4L and 4R. The tip of the fall prevention frames 4L and 4R on the turning side of the base follow the turning angle of the boom body 2 and the bases 4L 'and 4R'
The present invention relates to a fall prevention device for a self-propelled boom aerial work vehicle, which is provided with rotation follow-up mechanisms 5L and 5R that rotate about a fulcrum.
【０００７】[0007]
【作用】作業者が作業台３に搭乗してブーム体２を右方
に旋回せしめると、転倒防止フレーム４Ｌ・４Ｒの基部
４Ｌ'・４Ｒ'に設けた回動追従機構５Ｌ・５Ｒにより機
体１の左右に設けた左側の転倒防止フレーム４Ｌはその
ままの状態で、右側の転倒防止フレーム４Ｒの先端はブ
ーム体２の旋回角度に追従して機体１の後部左右に設け
た右側の基部４Ｒ'を支点として機体１の外側に回動す
るので機体１の接地巾が増大して機体１の転倒を防止で
きる。この状態でブーム体２を左方に回動せしめると、
前記回動追従機構５Ｌ・５Ｒにより右方に回動していた
転倒防止フレーム４Ｒの先端がブーム体２の復帰の旋回
角度に追従して回動し、ブーム体２が機体１の中央に戻
ると転倒防止フレーム４Ｒは最初の状態で復帰する。ブ
ーム体２を中央位置より左方に回動すると、上記の動き
と反対に右側の転倒防止フレーム４Ｒはそのままの状態
で、左側の転倒防止フレーム４Ｌの先端が基部４Ｌ'を
支点としてブーム体２の旋回角度に追従して外側に回動
する。[Operation] When an operator rides on the workbench 3 and turns the boom body 2 to the right, the body 1 is rotated by the rotation follow-up mechanisms 5L and 5R provided on the bases 4L 'and 4R' of the fall prevention frames 4L and 4R. Left tipping prevention frames 4L provided on the left and right sides of the left side of the right tipping prevention frame 4R follow the turning angle of the boom body 2 and the right side base portions 4R 'provided on the left and right rear portions of the body 1 Since it rotates outside the machine body 1 as a fulcrum, the ground contact width of the machine body 1 increases and the machine body 1 can be prevented from falling. When the boom body 2 is rotated to the left in this state,
The tip of the fall prevention frame 4R that has been rotated to the right by the rotation following mechanism 5L and 5R follows the turning angle of the boom body 2 for returning, and the boom body 2 returns to the center of the machine body 1. And the fall prevention frame 4R returns in the initial state. When the boom body 2 is pivoted to the left from the center position, the tip of the left fall prevention frame 4L is the boom 4 with the base 4L 'as a fulcrum, with the right fall prevention frame 4R being in the same state as the above movement. It follows the turning angle of and turns outward.
【０００８】[0008]
【実施例】図面は本考案の好適な一実施例を示したもの
で履帯を装備したブーム式高所作業車の場合を図示して
いる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings show a preferred embodiment of the present invention and show a boom type aerial work vehicle equipped with tracks.
【０００９】回動機構５Ｌ・５Ｒについて説明する。The rotating mechanisms 5L and 5R will be described.
【００１０】機体１の後部に架台７を設け、この架台７
のほぼ中央部に旋回保持筒８を立設し、この旋回保持筒
８に下方に突設せる軸体を有するブーム支柱体９の軸体
を嵌入して、ブーム支柱体９の上部を旋回保持筒８に載
置せしめ、この軸体の下部に、旋回アーム12を下方より
被嵌して旋回保持筒８に止着し、ブーム支柱体９を旋回
保持筒８に対して左右旋回自在にならしめる。A pedestal 7 is provided at the rear of the machine body 1, and the pedestal 7
The swing holding cylinder 8 is erected substantially at the center of the boom holding body 8 and the shaft body of the boom strut body 9 having a shaft body projecting downward is fitted into the swing holding cylinder 8 to swivel and hold the upper portion of the boom strut body 9. It is mounted on the cylinder 8, and the lower part of this shaft is fitted with the revolving arm 12 from below to be fixed to the revolving holding cylinder 8, and the boom support 9 can be revolved left and right with respect to the revolving holding cylinder 8. Close.
【００１１】旋回アーム12に右後方に突設せる旋回レバ
ー10とこの旋回レバー10の下方後方に旋回板11を止着
し、ブーム支柱体９の上部寄りに横軸13を設け、この横
軸13にブーム14の基部孔を被嵌してブーム14の先端を上
下回動自在に枢着する。A swivel lever 10 projecting rightward and rearward from the swivel arm 12, a swivel plate 11 fixedly attached to the lower rear of the swivel lever 10, and a horizontal shaft 13 provided near the upper part of the boom strut body 9. The base hole of the boom 14 is fitted into the boom 13, and the tip of the boom 14 is pivotally attached so as to be vertically rotatable.
【００１２】旋回レバー10の先端に旋回シリンダ15のピ
ストンロッド15'の頭部を軸着し、他端の旋回シリンダ1
5の頭部を架台７に設けたブラケットに枢着する。The head of the piston rod 15 'of the turning cylinder 15 is attached to the tip of the turning lever 10, and the turning cylinder 1 at the other end is attached.
The head of 5 is pivotally attached to the bracket provided on the gantry 7.
【００１３】旋回板11上に機体１中心線に対して左右対
称位置に支点16Ｌ・16Ｒを設け、架台７の後方寄り上下
左右に軸受部17Ｌ・17Ｌ, 17Ｒ・17Ｒを設け、この上下
の軸受部に回動支軸18Ｌ・18Ｒを垂設して基部４Ｌ'・
４Ｒ'を形成し、この回動支軸18Ｌ・18Ｒに上下の軸受
部をチャンネル形状の断面を有する縦杆で連結せる連結
アーム19Ｌ・19Ｒを軸着被嵌し、このおのおのの連結ア
ーム19Ｌ・19Ｒの下部寄りに連結レバー20Ｌ・20Ｒを後
方に突設し連結アーム19Ｌ・19Ｒのほぼ中央内側に機体
１の中心に向けて係止部21Ｌ・21Ｒを突設する。Supports 16L and 16R are provided on the swivel plate 11 symmetrically with respect to the center line of the machine body 1, and bearings 17L, 17L, 17R and 17R are provided on the upper, lower, left and right sides of the gantry 7, and the upper and lower bearings. 4L '・
4R 'is formed, and connecting arms 19L and 19R for connecting the upper and lower bearings with vertical rods having a channel-shaped cross section are shaft-fitted to the rotation supporting shafts 18L and 18R, respectively. Connection levers 20L and 20R are provided rearward near the lower portion of 19R, and locking portions 21L and 21R are provided so as to project toward the center of the body 1 substantially inside the center of the connection arms 19L and 19R.
【００１４】左右の履帯の外側の履帯の接地部よりやや
上方にパイプ形状の接地杆部22・22を履帯の長さ方向に
沿って付設し、この接地杆部22・22の上方に間隔Ｌをお
いて接地杆部22・22にやや平行にパイプ形状の上部杆部
23・23を配設し、この接地杆部22の前方下部を四分の一
の円弧形状に形成して立ち上がらせ上方を上部杆部２３
に止着し、接地杆部２２の後方を履帯の接地長さの後方
寄りやや三分の一付辺より後方に向けて次方に上方に傾
斜状に立ち上がらせて履帯の最後部より少し離れた後方
のところで上方に湾曲させて前記接地杆部22・上部杆部
23間の間隔Ｌの高さのほぼ２倍位の高さのところまで立
設せしめ、その上端と前記上部杆部23を連結し、この接
地杆部22・上部杆部23間に複数のパイプ形状の縦杆で連
結して転倒防止フレーム４Ｌ・４Ｒを形成する。Pipe-shaped grounding rods 22 and 22 are provided along the lengthwise direction of the crawler belts slightly above the grounding portions of the outer crawler belts on the left and right, and the distance L is provided above the grounding rods 22 and 22. Pipe-shaped upper rod that is slightly parallel to the ground rod 22
23. 23 are provided, and the lower front portion of the grounding rod portion 22 is formed into a quarter arc shape so as to stand up, and the upper portion is provided with the upper rod portion 23.
The rear side of the grounding rod 22 slightly toward the rear of the grounding length of the crawler belt toward the rear of the one-third side of the crawler belt, and then upwardly inclining upward, and slightly away from the end of the crawler track. The upper part of the ground rod 22 is curved upward at the rear side.
It is erected up to a height of about twice the height of the interval L between the 23, and the upper end thereof is connected to the upper rod portion 23, and a plurality of pipes are provided between the ground rod portion 22 and the upper rod portion 23. The vertical rods are connected to form the fall prevention frames 4L and 4R.
【００１５】左右の連結アーム19Ｌ・19Ｒの上下の軸受
部間に中空形状の軸受部を有する回動杆24Ｌ・24Ｒを設
け回動支軸18Ｌ・18Ｒに軸着し、この回動杆24Ｌ・24Ｒ
と前記転倒防止フレーム４Ｌ・４Ｒの接地杆部22の後方
の立ち上がり部とを止着板で止着し一体物に形成する。Rotating rods 24L and 24R having hollow bearing portions are provided between the upper and lower bearing portions of the left and right connecting arms 19L and 19R, and are pivotally attached to the rotating support shafts 18L and 18R. 24R
And the rising portion at the rear of the grounding rod portion 22 of the fall prevention frames 4L and 4R are fixed to each other by a fixing plate to be integrally formed.
【００１６】連結アーム19Ｌ・19Ｒのチャンネル形状の
縦杆のほぼ中央内側に機体１の中心に向けて横設筒27Ｌ
・27Ｒの基部を止着し他端に雄螺子部を設け、この横設
筒27Ｌ・27Ｒの内径に係止筒28Ｌ・28Ｒを嵌入し先端を
回動杆24Ｌ・24Ｒの中空形状の軸受部外径に当接せし
め、この係止筒28Ｌ・28Ｒの他端にフレキシブルワイヤ
29・29の先端を止着し、このフレキシブルワイヤ29・29
に弾圧バネ30・30を挿入して先端を前記係止筒28Ｌ・28
Ｒの他端に当接させ、横設筒27Ｌ・27Ｒの他端の雄螺子
部に螺子冠30'・30'を螺着して、弾圧バネ30・30を圧縮
して係止筒28Ｌ・28Ｒの先端を回動杆24Ｌ・24Ｒの中空
形状の軸受部外径に当接状態に付勢する。係止筒28Ｌ・
28Ｒの先端に当接する回動杆24Ｌ・24Ｒの軸受部に円周
に沿ってわずかに細長い長孔溝形状の係止孔31Ｌ・31Ｒ
を穿孔し係止筒28Ｌ・28Ｒの先端部を係止孔31Ｌ・31Ｒ
内に係止せしめる。A tube 27L is provided horizontally inside the center of the channel-shaped vertical rod of the connecting arms 19L and 19R toward the center of the body 1.
・ The base of 27R is fixed and the male screw is provided at the other end. The locking cylinders 28L and 28R are fitted into the inner diameters of the horizontal cylinders 27L and 27R, and the tip of the cylinder is a hollow rod bearing 24L and 24R. Contact the outer diameter, and attach the flexible wire to the other end of the locking cylinder 28L / 28R.
This flexible wire 29 ・ 29 is fixed by attaching the tip of 29 ・ 29.
Insert the elastic spring 30/30 into the end of the locking cylinder 28L / 28
It is brought into contact with the other end of R, the screw caps 30 ', 30' are screwed to the male screw portion of the other end of the lateral cylinder 27L, 27R, and the elastic springs 30, 30 are compressed to lock the cylinder 28L. The tip of 28R is urged into contact with the outer diameter of the hollow bearing of the rotating rods 24L and 24R. Locking cylinder 28L ・
Locking holes 31L and 31R that are slightly elongated along the circumference of the bearings of the rotating rods 24L and 24R that come into contact with the tip of 28R
The hole of the locking cylinder 28L / 28R and the locking hole 31L / 31R
Lock it inside.
【００１７】前記旋回板11上の支点16Ｌ・16Ｒと連結ア
ーム19Ｌ・19Ｒに止着せる連結レバー20Ｌ・20Ｒに設け
た支点32Ｌ・32Ｒとに、両端に二股接手を有し、支点長
さの調整可能な連結棒33Ｌ・33Ｒにて連結する。Adjusting the fulcrum length by having forked joints at both ends to the fulcrums 16L and 16R on the swivel plate 11 and fulcrums 32L and 32R provided on the connecting levers 20L and 20R that can be fixed to the connecting arms 19L and 19R. Connect with possible connecting rods 33L and 33R.
【００１８】作業台３上のブーム旋回レバー34を右に倒
すと油圧機構により旋回シリンダ１５の旋回シリンダ１
５’が伸びて旋回アーム12の旋回レバー10が旋回保持筒
８の中心を軸芯として図４の仮想線のように時計廻りに
回動するのでブーム14は右方に旋回する。When the boom swing lever 34 on the workbench 3 is tilted to the right, the swing cylinder 1 of the swing cylinder 15 is moved by the hydraulic mechanism.
5'is extended and the turning lever 10 of the turning arm 12 turns clockwise about the center of the turning holding cylinder 8 as shown by the phantom line in FIG. 4, so that the boom 14 turns to the right.
【００１９】ブーム14が右方に旋回すると旋回アーム12
に止着されている旋回板11も同時に回動し、旋回板11上
の支点16Ｌ・16Ｒは上記と同様時計廻りに回動する。When the boom 14 turns to the right, the turning arm 12
The swivel plate 11 fixed to the swivel plate also rotates at the same time, and the fulcrums 16L and 16R on the swivel plate 11 rotate in the clockwise direction as described above.
【００２０】右側の支点16Ｒの廻動により連結棒33Ｒに
より連結されている連結レバー20Ｒの支点32Ｒは基部４
Ｒ'の回動支軸18Ｒを支軸として時計廻りに回動し、連
結アーム19Ｒの係止筒28Ｒの先端とこの係止筒28Ｒの先
端が嵌入している回動杆24Ｒの係止孔31Ｒ縁とにより回
動杆24Ｒが回動するので、回動杆24Ｒに止着板で止着し
て一体物となっている転倒防止フレーム４Ｒの先端が基
部４Ｒ'を軸芯としてブーム14の旋回角度に追従して右
方向に回動して機体１の転倒が防止できる。The fulcrum 32R of the connecting lever 20R connected by the connecting rod 33R by the rotation of the fulcrum 16R on the right side is the base 4
The rotation shaft 18R of R'is rotated clockwise as a support shaft, and the distal end of the locking cylinder 28R of the connecting arm 19R and the locking hole of the rotary rod 24R into which the distal end of the locking cylinder 28R is fitted. Since the rotating rod 24R is rotated by the 31R edge, the tip of the fall prevention frame 4R which is fixed to the rotating rod 24R by a fastening plate and is an integral body has the base portion 4R 'as the axis of the boom 14. It is possible to prevent the machine body 1 from falling down by following the turning angle and turning to the right.
【００２１】一方右側の支点16Ｒと同時に回動する左側
の支点16Ｌの回動により連結棒33Ｌで連結されている支
点32Ｌも回動支軸18Ｌを支軸として図４の仮想線のよう
に回動するが、旋回保持筒８に対する基部４Ｌ'・４Ｒ'
及び支点16Ｌ・16Ｒの位置及び各回動軸芯に対する各支
点の長さ(支点16Ｌ・16Ｒ及び支点32Ｌ・32Ｒ)を図のよ
うに設定したので、支点32Ｌの回動角度は支点32Ｒの回
動角度より小さくこの両者の回動角度の差を利用して係
止筒28Ｌの先端部が当接する係止孔31Ｌ縁の円周方向の
溝形状を係止筒28Ｌの先端部の回動方向側にこの回動角
度を吸収するようわずかに細長い長孔溝形状に形成した
ので、転倒防止フレーム４Ｌの先端部の機体１の内側方
向への回動が回避される。On the other hand, the fulcrum 32L connected by the connecting rod 33L by the rotation of the left fulcrum 16L which rotates at the same time as the right fulcrum 16R also rotates about the rotary fulcrum shaft 18L as a phantom line as shown by the phantom line in FIG. It moves, but bases 4L 'and 4R' to the swivel holding cylinder 8
Since the positions of the fulcrums 16L and 16R and the lengths of the fulcrums with respect to the respective rotation axis cores (fulcrums 16L and 16R and fulcrums 32L and 32R) are set as shown in the figure, the rotation angle of the fulcrum 32L is that of the fulcrum 32R It is smaller than the angle, and the groove shape in the circumferential direction of the edge of the locking hole 31L with which the tip portion of the locking tube 28L abuts is formed by utilizing the difference between the two rotation angles. In addition, since it is formed in a slightly elongated elongated groove shape so as to absorb this rotation angle, the inward rotation of the body 1 of the tip end portion of the fall prevention frame 4L is avoided.
【００２２】ブーム旋回レバー34を左に倒すと旋回シリ
ンダ15のピストンロッド15'が縮み旋回アーム12の旋回
レバー10が反時計方向に回動して次第に元の位置に戻っ
てブーム14が中央の位置に復帰するので、その位置でブ
ーム旋回レバー34を起こし、ブーム14を機体１の中央の
位置に保持する。When the boom swing lever 34 is tilted to the left, the piston rod 15 'of the swing cylinder 15 contracts, the swing lever 10 of the swing arm 12 rotates counterclockwise, and gradually returns to its original position so that the boom 14 moves to the center. Since it returns to the position, the boom turning lever 34 is raised at that position to hold the boom 14 at the center position of the machine body 1.
【００２３】上記作動に伴って旋回板11の支点16Ｌ・16
Ｒも反時計方向に回動し、上記とは逆の作動で支点32Ｌ
・32Ｒが元の位置に復帰し、係止筒28Ｌ・28Ｒの先端と
係止孔31Ｌ・31Ｒにより回動杆24Ｌ・24Ｒが元の状態に
復するが、この復帰作動中回動杆24Ｌに設けた係止孔31
Ｌは前記ブーム14の最大旋回角度に対して回動角度を吸
収するようわずかに細長い長孔溝形状に形成したので、
転倒防止フレーム４Ｌは元の位置に維持されたままの状
態で保持される。Along with the above operation, the fulcrum 16L, 16 of the swivel plate 11
R also rotates counterclockwise and the fulcrum 32L by the operation opposite to the above.
・ 32R returns to the original position, and the turning rods 24L and 24R are restored to their original state by the tips of the locking cylinders 28L and 28R and the locking holes 31L and 31R. Provided locking hole 31
Since L is formed in a slightly elongated slot groove shape so as to absorb the turning angle with respect to the maximum turning angle of the boom 14,
The fall prevention frame 4L is held in a state of being maintained at the original position.
【００２４】一方回動杆24Ｒ内の係止孔31Ｒは上記のよ
うに転倒防止フレーム４Ｒの先端が基部４Ｒ'に対して
内側への回動を回動杆24Ｒに設けたわずかに細長い長孔
溝形状の係止孔31Ｒで形成したので、横設筒27Ｒの復帰
の最初の微小角度分の回動は所謂 「遊び」 となり、この
「遊び」 分が吸収された後で、転倒防止フレーム４Ｒは
基部４Ｒ'を支軸として、元の状態に復することにな
り、最終的には若干であるが、人力により転倒防止フレ
ーム４Ｒを元の状態に戻すことになる。On the other hand, the locking hole 31R in the turning rod 24R is a slightly elongated long hole in which the tip of the fall prevention frame 4R is turned inward with respect to the base 4R 'as described above. Since it is formed by the groove-shaped locking hole 31R, the rotation of the horizontal cylinder 27R for the first minute angle of the return is a so-called "play", and after this "play" is absorbed, the fall prevention frame 4R Will return to its original state with the base portion 4R 'as a support shaft, and eventually, although slightly, the fall prevention frame 4R will be returned to its original state by human power.
【００２５】尚、前記フレキシブルワイヤ29・29の他端
を機体１後部に付設した夫々の係止レバー(図面省略)に
接続し、この係止レバーを引くことにより、係止筒28Ｌ
・28Ｒの先端を弾圧バネ30・30の弾圧力に坑して横設管
27Ｌ・27Ｒ内に引き込ませ係止筒28Ｒ・28Ｌの先端によ
る係止孔31Ｌ・31Ｒへの係止を解除して回動杆24Ｌ・24
Ｒを回動支軸18Ｌ・18Ｒに自在に回動せしめることによ
り転倒防止フレーム４Ｌ・４Ｒの先端を機体１に対して
自在に外側に回動せしめることができる。The other ends of the flexible wires 29, 29 are connected to respective locking levers (not shown) attached to the rear portion of the machine body 1, and the locking levers are pulled to lock the locking cylinder 28L.
・ Horizontal pipe by digging the tip of 28R into the elastic force of the elastic spring 30 ・ 30
It is pulled into 27L / 27R and the locking rods 28L / 28L are unlocked by the tips of the locking cylinders 28R / 28L to locking holes 31L / 31R
By freely rotating R on the rotation support shafts 18L and 18R, the tips of the fall prevention frames 4L and 4R can be freely rotated to the outside with respect to the machine body 1.
【００２６】尚、符号35はブーム14の先端を上下に対し
て起伏自在ならしめる起伏シリンダである。Reference numeral 35 is a hoisting cylinder that allows the tip of the boom 14 to hoist vertically.
【００２７】[0027]
【考案の効果】本考案は上記のように機体にブーム体を
介して作業台を上下に対して起伏自在に、左右に対して
旋回自在に配設した自走式ブーム高所作業車において、
機体の後部左右に転倒防止フレームの基部を枢着して夫
々の先端を外側に回動自在に設け、この夫々の転倒防止
フレームの基部にブーム体の旋回側の転倒防止フレーム
の先端がブーム体の旋回角度に追従して前期基部を支点
として回動する回動追従機構を設けたので作業者が作業
台に搭乗したまでブーム体を旋回せしめると、ブーム体
の旋回側の転倒防止フレームの先端がブーム体の旋回角
度に追従して基部を始点として外側に回動するので、機
体１の接地巾が荷重のかかるブーム側に広がるのでそれ
だけ高所作業時の機体の転倒が防止できる実用的で安全
な自走式ブーム高所作業車となる。As described above, the present invention is a self-propelled boom aerial work vehicle in which the work platform is erected up and down and the left and right can be swung freely through the boom body as described above.
The bases of the fall prevention frames are pivotally attached to the left and right of the rear part of the machine body, and the tips of the fall prevention frames are rotatably provided to the outside.The tips of the fall prevention frames on the turning sides of the boom bodies are attached to the boom bodies at the bases of the respective fall prevention frames. Since the rotation follow-up mechanism that follows the swing angle of the robot and rotates around the base of the previous term as a fulcrum is provided, when the worker swings the boom body until the operator gets on the workbench, the tip of the fall prevention frame on the swing side of the boom body Rotates outward from the base as a starting point following the swing angle of the boom, so the ground contact width of the machine 1 spreads to the boom side where the load is applied, so it is practical to prevent the machine from tipping over during high-altitude work. It becomes a safe self-propelled boom aerial work vehicle.
【図１】本考案の作業時の状態を示す側面図である。FIG. 1 is a side view showing a working state of the present invention.
【図２】本考案の回動追従機構の要部の構造を示す一部
を切欠ける平面図である。FIG. 2 is a partially cutaway plan view showing the structure of the main part of the rotation following mechanism of the present invention.
【図３】本考案の回動追従機構の要部構造を示す一部を
切欠ける側面図である。FIG. 3 is a partially cutaway side view showing the main structure of the rotation following mechanism of the present invention.
【図４】本考案の回動追従機構の作動を示す説明用平面
図である。FIG. 4 is an explanatory plan view showing the operation of the rotation tracking mechanism of the present invention.
１ 機体 ２ ブーム体 ３ 作業台 ４Ｌ 転倒防止フレーム ４Ｒ 転倒防止フレーム ４Ｌ' 基部 ４Ｒ' 基部 ５Ｌ 回動追従機構 ５Ｒ 回動追従機構 1 Airframe 2 Boom body 3 Workbench 4L Fall prevention frame 4R Fall prevention frame 4L 'Base 4R' Base 5L Rotation following mechanism 5R Rotation following mechanism
Claims (1)
対して起伏自在に、左右に対して旋回自在に配設した自
走式ブーム高所作業車において、機体の後部左右に転倒
防止フレームの基部を枢着して夫々の先端を外側に回動
自在に設け、この夫々の転倒防止フレームの基部にブー
ム体の旋回側の転倒防止フレームの先端がブーム体の旋
回角度に追従して前記基部を支点として回動する回動追
従機構を設けたことを特徴とする自走式ブーム高所作業
車の転倒防止装置。1. A self-propelled boom aerial work vehicle in which a work platform is erected up and down vertically and pivotable left and right via a boom body on the machine body to prevent the machine from falling to the left and right at the rear of the machine body. The base of the frame is pivotally attached, and each tip is rotatably provided outside.The tip of the fall prevention frame on the swing side of the boom body follows the swing angle of the boom body on the base of each fall prevention frame. A fall prevention device for a self-propelled boom aerial work vehicle, which is provided with a rotation follow-up mechanism that rotates about the base as a fulcrum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9044691U JPH0646950Y2 (en) | 1991-11-05 | 1991-11-05 | Self-propelled boom aerial work vehicle fall prevention device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9044691U JPH0646950Y2 (en) | 1991-11-05 | 1991-11-05 | Self-propelled boom aerial work vehicle fall prevention device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0540296U JPH0540296U (en) | 1993-05-28 |
| JPH0646950Y2 true JPH0646950Y2 (en) | 1994-11-30 |
Family
ID=13998848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9044691U Expired - Lifetime JPH0646950Y2 (en) | 1991-11-05 | 1991-11-05 | Self-propelled boom aerial work vehicle fall prevention device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0646950Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6485657B2 (en) * | 2017-07-28 | 2019-03-20 | 有限会社河島農具製作所 | Aerial work equipment |
-
1991
- 1991-11-05 JP JP9044691U patent/JPH0646950Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0540296U (en) | 1993-05-28 |
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