JPS6341435Y2 - - Google Patents
Info
- Publication number
- JPS6341435Y2 JPS6341435Y2 JP6105683U JP6105683U JPS6341435Y2 JP S6341435 Y2 JPS6341435 Y2 JP S6341435Y2 JP 6105683 U JP6105683 U JP 6105683U JP 6105683 U JP6105683 U JP 6105683U JP S6341435 Y2 JPS6341435 Y2 JP S6341435Y2
- Authority
- JP
- Japan
- Prior art keywords
- boom
- cylinder
- hydraulic cylinder
- oil chamber
- strain
- 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
Links
- 238000001514 detection method Methods 0.000 claims description 32
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 17
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 230000008602 contraction Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Landscapes
- Forklifts And Lifting Vehicles (AREA)
Description
【考案の詳細な説明】
本考案は高所作業車におけるブームモーメント
検出装置に関するものである。本考案に係る高所
作業車におけるブームモーメント検出装置は、ブ
ームに作用するモーメントの実測値を限界値と対
比して実測値が限界値に達すると警報あるいは高
所作業車の動きを停止するための信号を出す安全
装置におけるブームモーメントの実測値の検出装
置として用いられるものである。[Detailed Description of the Invention] The present invention relates to a boom moment detection device for an aerial work vehicle. The boom moment detection device for the aerial work vehicle according to the present invention compares the measured value of the moment acting on the boom with a limit value and issues an alarm or stops the movement of the aerial work vehicle when the actual measured value reaches the limit value. This is used as a detection device for the actual measured value of boom moment in safety equipment that outputs a signal.
従来の高所作業車におけるブームモーメントの
検出は、旋回台とブーム適所間に配設されたブー
ム起伏用油圧シリンダの油圧を油圧−電気変換器
で検出することによりブーム起伏用油圧シリンダ
に作用する力に応じた電気出力信号を得るか、あ
るいは、ブーム起伏用油圧シリンダに配設した負
荷検出器によりブーム起伏用油圧シリンダに作用
する力に応じた電気出力信号を得るようにしてい
る。ところが、高所作業車においては、ブーム先
端へ起伏自在に枢着連結した作業者搭乗用の架台
をブームの起伏動にかかわりなく常に所定の角度
（水平）に保持するために、旋回台とブーム適所
間に配設された駆動側シリンダおよび架台とブー
ム適所間に配設さた駆動側シリンダに油圧的に連
動連結された架台角保持装置が設けられており、
この架台角保持装置における駆動側油圧シリンダ
の出力が、ブームモーメントの一部を担持するよ
うになつている。このため、ブームに作用するブ
ーム起伏支点まわりのモーメントは、ブーム起伏
用油圧シリンダと、架台角保持装置における駆動
側油圧シリンダにより担持されており、従来の如
く単にブームを起伏用油圧シリンダに作用する力
のみ検出するようにしたものにおいては、正確な
ブームモーメントの検出は不可能であつた。 Detection of boom moment in conventional aerial work vehicles is performed by detecting the hydraulic pressure of the boom hoisting hydraulic cylinder installed between the swivel platform and the appropriate position of the boom using a hydraulic-electrical converter, which acts on the boom hoisting hydraulic cylinder. An electrical output signal corresponding to the force acting on the boom hoisting hydraulic cylinder is obtained, or an electric output signal corresponding to the force acting on the boom hoisting hydraulic cylinder is obtained by a load detector disposed on the boom hoisting hydraulic cylinder. However, in high-altitude work vehicles, the swivel platform and the boom have to be mounted in order to maintain the worker boarding platform, which is pivotally connected to the tip of the boom so that it can be raised and lowered, always at a predetermined angle (horizontal) regardless of the raising and lowering movements of the boom. A pedestal angle holding device is provided which is hydraulically connected to the drive side cylinder disposed between the proper position and the drive side cylinder disposed between the pedestal and the boom proper position.
The output of the drive-side hydraulic cylinder in this gantry angle holding device is adapted to bear a portion of the boom moment. For this reason, the moment around the boom hoisting fulcrum that acts on the boom is carried by the boom hoisting hydraulic cylinder and the drive-side hydraulic cylinder in the gantry angle holding device, and the boom is simply applied to the boom hoisting hydraulic cylinder as in the past. In devices designed to detect only force, accurate detection of boom moment was impossible.
本考案の目的は、従来の高所作業車におけるブ
ームモーメント検出装置では得られれなかつた正
確なブームモーメントの検出を可能とした新規な
高所作業車におけるブームモーメント検出装置を
提供しようとするものである。 The purpose of the present invention is to provide a new boom moment detection device for aerial work vehicles that enables accurate boom moment detection that could not be obtained with conventional boom moment detection devices for aerial work vehicles. be.
以下本考案の高所作業車におけるブームモーメ
ントの検出装置の実施例を図に基づいて詳細に説
明する。 DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a boom moment detection device for an aerial work vehicle according to the present invention will be described in detail below with reference to the drawings.
先ず、第１図に基づいて本考案に係る高所作業
車のブームモーメント検出装置が取り付けられた
高所作業車部分について説明する。第１図におい
てＡは高所作業車であり、この高所作業車Ａは、
車輌１上へ旋回自在に搭載した旋回台２、旋回台
２へその基端を起伏調節自在に枢着したブーム
３、一端を旋回台２適所へ他端をブーム３適所へ
夫々回動自在な連結具４，５を介して連結したブ
ーム起伏用油圧シリンダ６、ブーム３先端へ起伏
自在に枢着連結した作業者搭乗用の架台７、およ
び旋回台２とブーム３適所間に配設された駆動側
油圧シリンダ８および架台７とブーム３適所間に
配設され駆動側油圧シリンダ８に油圧的に連動連
結さした被動側油圧シリンダ９とからなる架台角
保持装置とから構成されている。前記架台角保持
装置は、ブーム３の起伏動にかかわりなく旋回台
２に対する架台７の起伏角度を所定の角度（架台
床面がほぼ水平になる角度）に保持するものであ
り、この例では、駆動側油圧シリンダ８をブーム
３の起伏動に伴つて伸縮動されるよう旋回台２と
ブーム３間に配設すると共に、被動側油圧シリン
ダ９をそれが伸縮動すると架台７が起伏動するよ
う架台７とブーム３間に配設し、且つ駆動側油圧
シリンダ８の伸縮動に伴つて被動用油圧シリンダ
９が縮伸するよう駆動側油圧シリンダ８のシリン
ダボトム側油室８′を油圧配管１０を介して被動
側油圧シリンダ９のシリンダボトム側油室９′へ、
駆動側油圧シリンダ８のピストンロツド側油室
８″を油圧配管１１を介して被動側油圧シリンダ
９のピストンロツド側油室９″へ夫々連結してい
る。１２は、被動側油圧シリンダ９近傍の油圧配
管１０に介装され常時は被動側油圧シリンダ９方
向への油の流れを許容すると共に逆流を阻止し、
油圧配管１１内の油圧が一定圧以上となつたとき
両方向への油の流れを許容するよう構成したパイ
ロツトチエツク弁である。１３は、被動側油圧シ
リンダ９近傍の油圧配管１１に介装され常時は被
動側油圧シリンダ９方向への油の流れを許容する
と共に逆流を阻止し、油圧配管１０内の油圧から
一定圧以上となつたとき両方向への油の流れを許
容するよう構成したパイロツトチエツク弁であ
る。パイロツトチエツク弁１２および１３は、油
圧配管１０および１１が破損したとき、被動側油
圧シリンダ９からの油の流出を阻止し、架台７が
倒伏するのを防止するためのものであるが、駆動
側油圧シリンダ８の伸縮動（ブーム３の起伏動に
伴つて生ずる）に伴う被動側油圧シリンダ９の縮
伸動を防げることはない。ブーム起伏用油圧シリ
ンダ６の一端たるシリンダ６′のボトムエンドを
旋回台２適所へ回動自在に連結する前記連結具４
は、シリンダ６′のボトムエンド側のブラケツト
１４、旋回台２側のブラケツト１５、およびこれ
らブラケツト１４，１５を回動自在に枢着連結す
る軸１６で構成されている。また、ブーム起伏用
油圧シリンダ６の他端たるピストンロツド６″の
先端をブーム３適所へ回動自在に連結する前記連
結具５はピストンロツド６″の先端側のブラケツ
ト１７、ブーム３側のブラケツト１８、およびこ
れらブラケツト１７，１８を回動自在に枢着連結
する軸１９で構成されている。 First, based on FIG. 1, a portion of an aerial vehicle to which a boom moment detection device for an aerial vehicle according to the present invention is attached will be explained. In Fig. 1, A is an aerial work vehicle, and this aerial work vehicle A is
A swivel base 2 is rotatably mounted on the vehicle 1, a boom 3 whose base end is pivotably adjusted to the swivel base 2, one end of which can be freely rotated to a suitable position on the swivel base 2, and the other end to a suitable position of the boom 3. A hydraulic cylinder 6 for boom hoisting is connected via connectors 4 and 5, a pedestal 7 for boarding a worker is pivotally connected to the tip of the boom 3, and is arranged between the swivel stand 2 and the boom 3 at an appropriate position. It is composed of a driving side hydraulic cylinder 8 and a pedestal angle holding device consisting of a driven side hydraulic cylinder 9 which is disposed between the pedestal 7 and the boom 3 at a proper position and is hydraulically interlocked and connected to the driving side hydraulic cylinder 8. The gantry angle holding device maintains the up-and-down angle of the gantry 7 with respect to the swivel base 2 at a predetermined angle (an angle at which the gantry floor surface is approximately horizontal) regardless of the up-and-down movement of the boom 3, and in this example, The driving side hydraulic cylinder 8 is arranged between the swivel base 2 and the boom 3 so that it can extend and contract as the boom 3 moves up and down, and the driven side hydraulic cylinder 9 is arranged so that when it moves up and down, the pedestal 7 moves up and down. The cylinder bottom side oil chamber 8' of the drive side hydraulic cylinder 8 is connected to a hydraulic pipe 10, which is disposed between the pedestal 7 and the boom 3, and so that the driven hydraulic cylinder 9 contracts and expands as the drive side hydraulic cylinder 8 expands and contracts. to the cylinder bottom side oil chamber 9' of the driven side hydraulic cylinder 9,
The piston rod side oil chambers 8'' of the drive side hydraulic cylinder 8 are connected to the piston rod side oil chambers 9'' of the driven side hydraulic cylinder 9 via hydraulic piping 11, respectively. 12 is interposed in the hydraulic piping 10 near the driven hydraulic cylinder 9, and normally allows oil to flow in the direction of the driven hydraulic cylinder 9 and prevents reverse flow;
This pilot check valve is configured to allow oil to flow in both directions when the oil pressure in the hydraulic piping 11 exceeds a certain pressure. 13 is installed in the hydraulic piping 11 near the driven hydraulic cylinder 9, and normally allows oil to flow in the direction of the driven hydraulic cylinder 9 and prevents reverse flow, and prevents the oil pressure in the hydraulic piping 10 from exceeding a certain pressure. This is a pilot check valve designed to allow oil to flow in both directions when the oil is exhausted. The pilot check valves 12 and 13 are intended to prevent oil from flowing out from the driven side hydraulic cylinder 9 and to prevent the pedestal 7 from falling down when the hydraulic piping 10 and 11 are damaged. There is no way to prevent the contraction and expansion of the driven hydraulic cylinder 9 due to the expansion and contraction of the hydraulic cylinder 8 (which occurs as the boom 3 moves up and down). The connecting tool 4 rotatably connects the bottom end of the cylinder 6', which is one end of the boom hoisting hydraulic cylinder 6, to an appropriate position on the swivel base 2.
The cylinder 6' is comprised of a bracket 14 on the bottom end side of the cylinder 6', a bracket 15 on the swivel base 2 side, and a shaft 16 that pivotally connects these brackets 14 and 15. The connecting tool 5, which rotatably connects the tip of the piston rod 6'', which is the other end of the boom hoisting hydraulic cylinder 6, to an appropriate position on the boom 3 is a bracket 17 on the tip side of the piston rod 6'', a bracket 18 on the boom 3 side, and a shaft 19 which rotatably connects these brackets 17 and 18.
次に本考案に係る高所作業車のブームモーメン
ト検出装置について説明する。本考案のブームモ
ーメント検出装置Ｂは、第１図および第２図に示
すように起伏用油圧シリンダ６のピストンロツド
６″の先端とこのピストンロツド６″の先端をブー
ム３に回動自在に連結する連結具５間に介装され
た歪測定用部材２０と歪測定用部材２０の歪を電
気的に測定するストレーンゲージ２１からなる負
荷検出器２２を備えている。負荷検出器２２のピ
ストンロツド６″先端と連結具５間への介装は、
第２図に示す如く行なわれている。すなわち、ピ
ストンロツド６″の先端にこのピストンロツド
６″と同外径に仕上げられた中空円筒２３の基端
を溶接し、この中空円筒２３の基端部内周に設け
たネジ部２４へ、負荷検出器２２における歪検出
用部材２０の基端部外周に設けたネジ部２５を螺
合することにより歪検出用部材２０が前記中空円
筒２３内に位置するよう配置している。歪検出用
部材２０は、ストレーンゲージ２１を取り付けた
中央頚部を狭む基端側の大径部２６および先端側
の大径部２７の外径を、前記中空円筒２３の内径
にほゞ等しく形成しており、この大径部２６，２
７に配したｏリング２８，２９により中央頚部を
外界から遮断している。歪検出用部材２０の先端
側の大径部２７には当該大径部２７と同心的且つ
一体的に形成され当該大径部２７の外径よりも小
さな外径を有するロツド３０が設けられている。
ロツド３０の先端は、前記中空円筒２３の先端の
壁３１を油密摺動自在に貫いて延出しており、そ
こに連結具５のブラケツト１７が設けられてい
る。このようにしてピストンロツド６″の先端と
連結具５間に介装した負荷検出器２２の歪検出用
部材２０は、ブーム起伏用油圧シリンダ６に作用
する力を担持するものであるが、歪検出用部材２
０は後述するシリンダ装置３２によつても圧縮力
を受けるようになつている。歪検出用部材２０の
大径部２７、ロツド３０、中空円筒２３および中
空円筒２３先端の壁３１によつて囲まれた油室３
３に油圧力が作用したとき、歪検出用部材２０
は、油室３３内の油圧力に応じた圧縮力を受ける
ようになつている。すなわち、油室３３を画定す
る上記各部材はシリンダ装置３２を構成してお
り、このシリンダ装置３２は、当該シリンダ装置
３２の出力が負荷検出器２２における歪検出用部
材２０を圧縮するよう歪検出用部材２０へ関連連
結している。シリンダ装置３２の油室３３は、架
台角保持装置における駆動側油圧シリンダ９のシ
リンダボトム側油室９′すなわちブームモーメン
ト担持側油室に油圧配管３４でもつて連結してい
る。シリンダ装置３２の有効受圧面積Ｓすなわ
ち、中空円筒２３の中空部の断面積とロツド３０
の断面積の差の面積Ｓは、
ブーム起伏シリンダ６のモーメントアーム（ブ
ーム３の起伏支点からブーム起伏用シリンダ６の
伸縮方向軸線Ｃに下した垂直の長さ）をａ、
駆動側油圧シリンダ８のモーメントアーム（ブ
ーム３の起伏支点から駆動側油圧シリンダ８の伸
縮方向軸線ｄに下した垂線の長さ）をｂ、
駆動側油圧シリンダ８のブームモーメント担持
側油室８′（シリンダボトム側油室８′）の有効受
圧面積をSO、
とすると、
Ｓ＝SO×ｂ／ａ ……(1)
に設定している。 Next, a boom moment detection device for an aerial work vehicle according to the present invention will be explained. The boom moment detection device B of the present invention has a connection that rotatably connects the tip of the piston rod 6'' of the hydraulic cylinder 6 for luffing and the tip of the piston rod 6'' to the boom 3, as shown in FIGS. 1 and 2. A load detector 22 is provided which includes a strain measuring member 20 interposed between the tools 5 and a strain gauge 21 that electrically measures strain in the strain measuring member 20. The insertion of the load detector 22 between the tip of the piston rod 6'' and the connector 5 is as follows:
This is done as shown in FIG. That is, the base end of a hollow cylinder 23 finished to the same outer diameter as the piston rod 6'' is welded to the tip of the piston rod 6'', and a load detector is attached to the threaded part 24 provided on the inner periphery of the base end of the hollow cylinder 23. The strain detection member 20 is disposed within the hollow cylinder 23 by screwing together a screw portion 25 provided on the outer periphery of the base end portion of the strain detection member 20 at 22 . The strain detection member 20 has a large diameter portion 26 on the proximal end and a large diameter portion 27 on the distal end that narrow the central neck portion to which the strain gauge 21 is attached, each having an outer diameter approximately equal to the inner diameter of the hollow cylinder 23. This large diameter portion 26, 2
O-rings 28 and 29 placed at 7 isolate the central neck from the outside world. A rod 30 is provided on the large diameter portion 27 on the tip side of the strain detection member 20, and is formed concentrically and integrally with the large diameter portion 27 and has an outer diameter smaller than the outer diameter of the large diameter portion 27. There is.
The tip of the rod 30 extends through the wall 31 of the tip of the hollow cylinder 23 in an oil-tight and slidable manner, and the bracket 17 of the connector 5 is provided there. The strain detection member 20 of the load detector 22, which is thus interposed between the tip of the piston rod 6'' and the connector 5, carries the force acting on the boom hoisting hydraulic cylinder 6. Part 2
0 is also subjected to compressive force by a cylinder device 32, which will be described later. An oil chamber 3 surrounded by the large diameter portion 27 of the strain detection member 20, the rod 30, the hollow cylinder 23, and the wall 31 at the tip of the hollow cylinder 23.
When hydraulic pressure is applied to 3, the strain detection member 20
is adapted to receive a compressive force corresponding to the hydraulic pressure within the oil chamber 33. That is, each of the above-mentioned members defining the oil chamber 33 constitutes a cylinder device 32, and this cylinder device 32 detects strain so that the output of the cylinder device 32 compresses the strain detection member 20 in the load detector 22. is connected to the member 20 for use. The oil chamber 33 of the cylinder device 32 is connected via a hydraulic pipe 34 to the cylinder bottom side oil chamber 9' of the drive side hydraulic cylinder 9 in the gantry angle holding device, that is, the boom moment carrying side oil chamber. Effective pressure receiving area S of the cylinder device 32, that is, the cross-sectional area of the hollow part of the hollow cylinder 23 and the rod 30
The area S of the difference in the cross-sectional area of b, the moment arm of the boom 3 (the length of the perpendicular line drawn from the lifting fulcrum of the boom 3 to the extension direction axis d of the drive side hydraulic cylinder 8), and the boom moment carrying side oil chamber 8' of the drive side hydraulic cylinder 8 (cylinder bottom side oil chamber 8') If the effective pressure-receiving area of chamber 8' is S O , it is set as S=S O ×b/a (1).
次に作用を説明する。今、ブーム起伏用油圧シ
リンダ６の担持力をＦ、架台角保持装置における
駆動側油圧シリンダ８のブームモーメント担持側
油室８′（シリンダボトム側油室８′）に油圧力Ｐ
が生じている状態を想定すると、ブーム３の起伏
支点まわりのモーメントＭは、
Ｍ＝Ｆ・ａ＋Ｐ・SO・ｂ ……(2)
一方、負荷検出器における歪検出用部材２０に
作用する力FTは、ブーム起伏用油圧シリンダ６
が担持する力Ｆとシリンダ装置３２の出力の合計
であるので、
FT＝Ｆ＋Ｐ・Ｓ ……(3)
(3)式に上記(1)式を代入し、
FT＝Ｆ＋Ｐ・SO・ｂ／ａ ……(4)
両辺にａを剰じて
ａ・FT＝Ｆ・ａ＋Ｐ・SO・ｂ ……(5)
(2)式と(5)式から
Ｍ＝ａ・FT ……(6)
したがつて、FTすなわち、負荷検出器２２に
おける歪検出用部材２０に作用する力は、ブーム
３の起伏支点まわりのモーメントＭに正確に比例
することになり、負荷検出器２２は、ブームモー
メントを正確に検出することができるものであ
る。 Next, the action will be explained. Now, the supporting force of the boom hoisting hydraulic cylinder 6 is F, and the hydraulic pressure P is in the boom moment supporting side oil chamber 8' (cylinder bottom side oil chamber 8') of the drive side hydraulic cylinder 8 in the gantry angle holding device.
Assuming that this is occurring, the moment M around the fulcrum of the boom 3 is M=F・a+P・S O・b...(2) On the other hand, the force acting on the strain detection member 20 in the load detector F T is hydraulic cylinder 6 for boom hoisting
is the sum of the force F carried by the cylinder device 32 and the output of the cylinder device 32, so F T =F+P・S...(3) Substituting the above equation (1) into equation (3), F T =F+P・S O・b/a...(4) Add a to both sides, a・F T =F・a+P・S O・b...(5) From equations (2) and (5), M=a・F T ... ...(6) Therefore, F T , that is, the force acting on the strain detection member 20 in the load detector 22 is exactly proportional to the moment M around the fulcrum of the boom 3, and the load detector 22 is capable of accurately detecting the boom moment.
以上の如く本考案の高所作業車におけるブーム
モーメント検出装置は、車輌上へ旋回自在に搭載
した旋回台、旋回台へその基端を起伏調節自在に
枢着したブーム、一端を旋回台適所へ他端をブー
ム適所へ夫々回動自在な連結具を介して連結した
ブーム起伏用油圧シリンダ、ブーム先端へ起伏自
在に枢着連結した作業者搭乗用の架台および旋回
台とブームの適所間に配設された駆動側油圧シリ
ンダおよび架台とブーム適所間に配設され駆動側
シリンダに油圧的に連動連結した被動側シリンダ
とからなり旋回台に対する架台の起伏角度を所定
の角度に保持する架台角保持装置とからなる高所
作業車におけるブームモーメント検出装置であつ
て、歪測定部材とこの歪測定部材の歪を電気的に
測定するストレーンゲージからなる負荷検出器
を、起伏用油圧シリンダの一端又は他端と当該一
端又は他端を旋回台又はブームの適所へ連結する
連結具との間に介装すると共に、油室を備え油室
に作用する油圧に応じた出力をもつシリンダ装置
を、当該シリンダの出力が前記負荷検出器におけ
る歪検出用部材を圧縮するよう歪検出用部材に関
連連結し、更に前記シリンダ装置の前記油室へ架
台角保持装置における駆動側シリンダのブームモ
ーメント担持側油室の油圧を作用させたので、簡
単な構成でありながら、ブームモーメントをより
正確に検出することができるので、その実用上の
効果極めて大である。 As described above, the boom moment detection device for an aerial work vehicle according to the present invention consists of a swivel platform mounted on the vehicle so as to be freely swivelable, a boom whose base end is pivotably adjusted to the swivel platform, and one end of which is attached to an appropriate position on the swivel platform. A hydraulic cylinder for raising and lowering the boom is connected at the other end to the appropriate position of the boom via a rotatable connector, a pedestal for boarding the operator is connected to the tip of the boom so that it can be raised and lowered freely, and a pedestal is arranged between the swivel base and the appropriate position of the boom. The pedestal angle maintenance system consists of a drive-side hydraulic cylinder installed between the pedestal and the boom, and a driven-side cylinder which is arranged between the pedestal and the boom and is hydraulically interlocked and connected to the driving cylinder. A boom moment detection device for an aerial work vehicle consisting of a strain measuring member and a strain gauge for electrically measuring the strain of the strain measuring member, which is connected to one end of a hydraulic cylinder for luffing or another A cylinder device is interposed between the end and a connecting device that connects the one end or the other end to a suitable position of the swivel table or boom, and is equipped with an oil chamber and has an output corresponding to the hydraulic pressure acting on the oil chamber. is connected to the strain detection member so that the output compresses the strain detection member in the load detector, and further connects the boom moment carrying side oil chamber of the drive side cylinder in the gantry angle holding device to the oil chamber of the cylinder device. Since hydraulic pressure is applied, the boom moment can be detected more accurately despite the simple configuration, and its practical effects are extremely large.
尚、上記実施例にあつては、架台角保持装置に
おける駆動側油圧シリンダ８のブームモーメント
担持側油室８′（シリンダボトム側油室８′）の有
効受圧面積SOと、シリンダ装置３２の有効受圧面
積Ｓとの関係を上記(1)式のように設定したが、本
考案は、このような厳密な設定にとらわれる必要
はなく、要は架台角保持装置における駆動側油圧
シリンダ８によるブームモーメント担持力を、シ
リンダ装置３２でもつて負荷検出器２２における
歪検出用部材２０に圧縮力として作用させ、冒頭
記載の従来のものに比してより正確にブームモー
メントを検出すれば足りるものである。 In the above embodiment, the effective pressure receiving area S O of the boom moment carrying side oil chamber 8' (cylinder bottom side oil chamber 8') of the drive side hydraulic cylinder 8 in the frame angle holding device and the cylinder device 32 are Although the relationship with the effective pressure-receiving area S is set as shown in equation (1) above, the present invention does not need to be bound by such a strict setting. It is sufficient to cause the moment carrying force to act as a compressive force on the strain detection member 20 in the load detector 22 using the cylinder device 32, and to detect the boom moment more accurately than the conventional method described at the beginning. .
また、上記実施例においては、負荷検出装置２
２を、ブーム起伏用油圧シリンダ６の他端たるピ
ストンロツド６″の先端と連結具５間に介装した
例を示したが、この負荷検出装置２２は、ブーム
起伏用油圧シリンダ６の一端たるシリンダ６′と
連結具４間に介装しても良いこと勿論である。 Furthermore, in the above embodiment, the load detection device 2
2 is interposed between the tip of the piston rod 6'', which is the other end of the boom hoisting hydraulic cylinder 6, and the connector 5. Of course, it may be interposed between the connector 6' and the connector 4.
第１図は、本考案の高所作業車におけるブーム
モーメント検出装置を実施した高所作業車の説明
図、第２図は、本考案に係る高所作業車のブーム
モーメント検出装置の説明図である。
車輌……１、旋回台……２、ブーム……３、連
結具……４，５、ブーム起伏用油圧シリンダ……
６、架台……７、駆動用油圧シリンダ……８、被
動用油圧シリンダ……９、架台角保持装置……駆
動用油圧シリンダ８と被動用油圧シリンダ９から
なるもの、負荷検出器……２２、歪検出用部材…
…２０、ストレーンゲージ……２１、シリンダ装
置……３２。
The boom moment detector is a device that detects the moment of the boom when the boom is lifted.
6, stand ... 7, driving hydraulic cylinder ... 8, driven hydraulic cylinder ... 9, stand angle holding device ... consisting of driving hydraulic cylinder 8 and driven hydraulic cylinder 9, load detector ... 22, strain detection member ...
...20, strain gauge...21, cylinder device...32.
Claims (1)
その基端を起伏調節自在に枢着したブーム、一端
を旋回台適所へ他端をブーム適所へ夫々回動自在
な連結具を介して連結したブーム起伏用油圧シリ
ンダ、ブーム先端へ起伏自在に枢着連結した作業
者搭乗用の架台および旋回台とブームの適所間に
配設された駆動側油圧シリンダおよび架台とブー
ム適所間に配設され駆動側シリンダに油圧的に連
動連結した被動側シリンダとからなり旋回台に対
する架台の起伏角度を所定の角度に保持する架台
角保持装置とからなる高所作業車におけるブーム
モーメント検出装置であつて、歪測定部材とこの
歪測定部材の歪を電気的に測定するストレーンゲ
ージからなる負荷検出器を、起伏用油圧シリンダ
の一端又は他端と当該一端又は他端を旋回台又は
ブームの適所へ連結する連結具との間に介装する
と共に、油室を備え油室に作用する油圧に応じた
出力をもつシリンダ装置を、当該シリンダの出力
が前記負荷検出器における歪検出用部材を圧縮す
るよう歪検出用部材に関連連結し、更に前記シリ
ンダ装置の前記油室へ架台角保持装置における駆
動側シリンダのブームモーメント担持側油室の油
圧を作用させたことを特徴とする高所作業車にお
けるブームモーメント検出装置。 A swivel base mounted on a vehicle so that it can rotate freely, a boom whose base end is pivoted to the swivel base so that it can be adjusted in elevation, and one end connected to the swivel base in a suitable position and the other end to the boom in a suitable position via rotatable connectors. A hydraulic cylinder for raising and lowering the boom, a pedestal for boarding a worker that is pivotally connected to the tip of the boom so that it can be raised and lowered, a drive-side hydraulic cylinder located between the swivel base and the appropriate position of the boom, and a hydraulic cylinder located between the pedestal and the boom at the appropriate position. A boom moment detection device for an aerial work vehicle, comprising a driven side cylinder hydraulically coupled to a driving side cylinder, and a pedestal angle holding device that maintains the undulation angle of the pedestal at a predetermined angle with respect to the rotating platform, A load detector consisting of a strain measuring member and a strain gauge that electrically measures the strain of this strain measuring member is connected to one end or the other end of a hydraulic cylinder for luffing and the one end or the other end to an appropriate position on a swivel base or boom. A cylinder device, which is interposed between the coupling device and the cylinder device and has an oil chamber and has an output corresponding to the hydraulic pressure acting on the oil chamber, is strained so that the output of the cylinder compresses the strain detection member in the load detector. A boom moment in an aerial work vehicle, characterized in that the boom moment supporting side oil chamber of the drive side cylinder of the gantry angle holding device is connected to the detecting member and further acts on the oil chamber of the cylinder device. Detection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6105683U JPS59165900U (en) | 1983-04-22 | 1983-04-22 | Boom moment detection device for aerial work vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6105683U JPS59165900U (en) | 1983-04-22 | 1983-04-22 | Boom moment detection device for aerial work vehicles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59165900U JPS59165900U (en) | 1984-11-07 |
| JPS6341435Y2 true JPS6341435Y2 (en) | 1988-10-31 |
Family
ID=30191275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6105683U Granted JPS59165900U (en) | 1983-04-22 | 1983-04-22 | Boom moment detection device for aerial work vehicles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59165900U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59223695A (en) * | 1983-05-30 | 1984-12-15 | 新明和工業株式会社 | Safety device for boom loading car |
| JP2565838Y2 (en) * | 1986-11-29 | 1998-03-25 | 株式会社アイチコーポレーシヨン | Double pilot check valve |
-
1983
- 1983-04-22 JP JP6105683U patent/JPS59165900U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59165900U (en) | 1984-11-07 |
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