JPH0810591Y2 - Work platform lift support structure for aerial work platforms - Google Patents
Work platform lift support structure for aerial work platformsInfo
- Publication number
- JPH0810591Y2 JPH0810591Y2 JP2995990U JP2995990U JPH0810591Y2 JP H0810591 Y2 JPH0810591 Y2 JP H0810591Y2 JP 2995990 U JP2995990 U JP 2995990U JP 2995990 U JP2995990 U JP 2995990U JP H0810591 Y2 JPH0810591 Y2 JP H0810591Y2
- Authority
- JP
- Japan
- Prior art keywords
- plate
- support structure
- rail
- fixed
- workbench
- 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
- Forklifts And Lifting Vehicles (AREA)
Description
【考案の詳細な説明】 イ．考案の目的 （産業上の利用分野） 本考案は、ブームの先端に昇降自在に作業台を取り付
けてなる高所作業車の作業台昇降支持構造に関する。[Detailed Description of Device] a. Purpose of the Invention (Industrial application field) The present invention relates to a work platform lifting support structure for an aerial work vehicle in which a work platform is attached to the tip of a boom so as to be able to move up and down.
（従来の技術） 車体上に旋回、起伏、伸縮等が自在なブームを取り付
け、このブームの先端に作業台を取り付けてなる高所作
業車は従来から多用されている。さらに、この高所作業
車の作業性を向上させるため、ブームの先端に支持部材
を取り付けるとともにこの支持部材を中心として作業台
を旋回させるようにしたり、支持部材に対して作業台を
昇降可能とすることもある。このような構成としては、
例えば、実開昭63-59197号公報に開示のものがある。(Prior Art) An aerial work vehicle in which a boom that can be swung, raised and lowered, and expanded and contracted is mounted on a vehicle body, and a workbench is mounted at the tip of the boom has been widely used. Furthermore, in order to improve the workability of this aerial work vehicle, a support member is attached to the tip of the boom and the workbench can be swung around this support member, and the workbench can be moved up and down with respect to the support member. There are also things to do. As such a configuration,
For example, there is one disclosed in Japanese Utility Model Laid-Open No. 63-59197.
このような高所作業車においては、作業台を昇降自在
に支持するため、従来では、作業台の同一外側面に断面
“コ”字状のレール部材を開放部を外方にして上下に延
びて平行に固設し、このレール部材の開放部に対向する
ブラケットを支持部材に平行に固設し、このブラケット
に回転自在に一対のカムフォロアを上下に位置させて取
り付けており、カムフォロアをレール部材のコ字状断面
内に入り込ませて作業台の昇降支持構造を構成してい
る。In such an aerial work vehicle, in order to support the work platform so that it can be lifted and lowered, conventionally, a rail member having a U-shaped cross section is extended vertically on the same outer surface of the work table with the open portion facing outward. Fixed in parallel with each other, a bracket facing the open portion of the rail member is fixed in parallel with the support member, and a pair of cam followers are rotatably attached to the bracket so that the cam followers are vertically positioned. It is inserted into the U-shaped cross section to form a lifting / lowering support structure for the workbench.
この構造の場合には、上下に離れて位置する一対のカ
ムフォロアに案内されて、レール部材は上下に移動可能
なため、作業台が支持部材に対して昇降自在となる。In this structure, the rail member can be moved up and down by being guided by the pair of cam followers which are vertically separated from each other, so that the workbench can be moved up and down with respect to the support member.
（考案が解決しようとする課題） 上記作業台昇降支持構造においては、レール部材が断
面コ字状でなければならず、且つカムフォロアの外径は
このコ字状断面の幅に対応するものでなければならず、
構造が複雑で重量が大きくなり易いという問題がある。
このため、レール部材を板状の部材で構成する等、この
構造の簡略化および軽量化が望まれる。(Problems to be Solved by the Invention) In the workbench lifting support structure described above, the rail member must have a U-shaped cross section, and the outer diameter of the cam follower must correspond to the width of the U-shaped cross section. Must
There is a problem that the structure is complicated and the weight tends to be large.
For this reason, simplification and weight reduction of this structure are desired, for example, by constructing the rail member with a plate-shaped member.
本考案はこのような事情に鑑みたもので、その構造が
簡単で且つ軽量化を図ることができるような高所作業車
の作業台昇降支持構造を提供することを目的とする。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a workbench elevation support structure for an aerial work vehicle whose structure is simple and whose weight can be reduced.
ロ．考案の構成 （課題を解決するための手段） 上記目的達成のため、本考案においては、作業台の同
一外側面にそれぞれ板状レールを上下に延びて平行に固
設し、ブーム先端に取り付けられた支持部材に各板状レ
ールに対向するブラケットを互いに平行に且つ上下に延
びて固設し、これら各ブラケットにそれぞれ板状レール
を間に挟んで対向するとともに上下に離れて位置するよ
うに各一対のカムフォロアを取り付けて作業台昇降支持
構造を構成している。B. Configuration of the Invention (Means for Solving the Problems) In order to achieve the above object, in the present invention, plate-like rails are vertically extended and fixed in parallel to each other on the same outer surface of a workbench, and attached to the tip of a boom. Brackets facing the plate-shaped rails are fixed to the support member by extending vertically and in parallel with each other, and the brackets are opposed to each other with the plate-shaped rails sandwiched therebetween and positioned vertically apart from each other. A pair of cam followers are attached to form a workbench lifting support structure.
（作用） このような構成の支持構造の場合には、作業台の重量
を受けて支持部材側に作用するモーメントはカムフォロ
アと板状レールとの当接により受け止められ、さらに、
このように板状レールと当接した状態のままカムフォロ
アにより案内されて板状レールが固設された作業第の昇
降が可能であり、これにより、支持部材に対して作業台
が昇降可能となる。(Operation) In the case of the support structure having such a configuration, the moment acting on the support member side due to the weight of the workbench is received by the contact between the cam follower and the plate-shaped rail, and further,
In this manner, it is possible to move up and down the work table with respect to the support member while the plate-shaped rail is fixed by being guided by the cam follower while being in contact with the plate-shaped rail. .
（実施例） 以下、本考案の好ましい実施例について、図面に基づ
いて説明する。(Embodiment) Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings.
本考案に係る作業台昇降支持構造を有した高所作業車
を第４図に示している。この高所作業車は、車体１上に
旋回自在な旋回台２を有し、この旋回台２に起伏自在に
伸縮ブーム３が取り付けられている。伸縮ブーム３は、
旋回台２に枢支された基端ブーム3aと、この基端ブーム
3aに対して伸縮自在な先端ブーム3bとから構成される。
先端ブーム3bの先端に上下に揺動自在にポスト部材５が
取り付けられ、このポスト部材５に対して水平面上で回
動自在に支持部材６が取り付けられ、この支持部材６に
昇降支持構造10を介して昇降自在に作業台７が取り付け
られている。なお、車体１の前後左右４箇所には作業時
に伸長して車体１を支持するアウトリガ８が配設されて
いる。FIG. 4 shows an aerial work vehicle having a workbench lifting support structure according to the present invention. This aerial work vehicle has a swivel base 2 that can swivel on a vehicle body 1, and a telescopic boom 3 is attached to the swivel base 2 so as to be able to rise and fall. Telescopic boom 3
A base boom 3a pivotally supported by the swivel base 2 and the base boom
It is composed of a tip boom 3b that is extendable and retractable with respect to 3a.
A post member 5 is attached to the tip of the tip boom 3b so as to be vertically swingable, a support member 6 is attached to the post member 5 so as to be rotatable on a horizontal plane, and an elevating support structure 10 is attached to the support member 6. A work table 7 is attached so as to be able to move up and down. Outriggers 8 are provided at four positions on the front, rear, left, and right of the vehicle body 1 to extend and support the vehicle body 1 during work.
上記昇降支持構造10を介した支持部材６の作業台７へ
の取り付けを第１図および第２図に詳細に示している。The attachment of the support member 6 to the workbench 7 via the lifting support structure 10 is shown in detail in FIGS. 1 and 2.
支持部材６は、ポスト部材５の軸5aに回動自在に取り
付けられた筒状部6aと、この筒状部6aに接合された２枚
の板材6b,6bとからなり、板材6b,6bの先端側（図におい
て右側）の両端にそれぞれ断面Ｌ字状のブラケット11が
平行に固設されている。なお、左右対称形状なので、片
方のブラケット11のみを示しており、同様に昇降支持構
造10が片方のみを示す。The support member 6 is composed of a tubular portion 6a rotatably attached to the shaft 5a of the post member 5 and two plate members 6b and 6b joined to the tubular member 6a. Brackets 11 having an L-shaped cross section are fixed in parallel at both ends on the tip side (right side in the figure). Since it has a bilaterally symmetrical shape, only one bracket 11 is shown, and similarly, the lifting support structure 10 shows only one.
一方、作業台７の同一外側面の左右端部には、支持部
材６の方に突出するとともに上下に平行に延びるフラン
ジ部7aが形成されており、このフランジ部7aに上下に延
びた断面Ｌ字状の板状からなるレール部材15がボルト9a
およびナット9bにより平行に固定されている。レール部
材15のレール部15aは外側方に突出してブラケット11の
先端側内面と対向する。On the other hand, flanges 7a that project toward the support member 6 and extend in parallel in the vertical direction are formed at the left and right ends of the same outside surface of the work table 7, and the cross section L extending in the vertical direction is formed on the flange portion 7a. The rail member 15 made of a V-shaped plate is bolt 9a.
And fixed in parallel by a nut 9b. The rail portion 15a of the rail member 15 projects outward and faces the inner surface of the bracket 11 on the tip side.
ブラケット11の内面には、それぞれボルト12a,13aに
より２個のカムフォロア12,13が取り付けられている。
これらカムフォロア12,13は、第１図に示すように、上
下に離れるとともにレール部材15のレール部15aの両側
にこれを挟むようにして位置する。但し、第１図におい
て、レール部15aの右側に位置するカムフォロア12が上
側に位置し、レール部15aの左側に位置するカムフォロ
ア13が下側に位置する。これにより、作業台７の自重お
よび搭載物の重量により生じるモーメントＭは、上側の
カムフォロア12とレール部15aの右側面との当接および
下側のカムフォロア13とレール部15aの左側面との当接
により受けとめられ、且つ、カムフォロア12,13の自転
により、ブラケット11に対してレール部材15が昇降可能
となっている。Two cam followers 12, 13 are attached to the inner surface of the bracket 11 by bolts 12a, 13a, respectively.
As shown in FIG. 1, these cam followers 12 and 13 are separated from each other in the vertical direction and are located on both sides of the rail portion 15a of the rail member 15 so as to sandwich them. However, in FIG. 1, the cam follower 12 located on the right side of the rail portion 15a is located on the upper side, and the cam follower 13 located on the left side of the rail portion 15a is located on the lower side. As a result, the moment M generated by the weight of the workbench 7 and the weight of the mounted object causes the contact between the upper cam follower 12 and the right side surface of the rail portion 15a and the contact between the lower cam follower 13 and the left side surface of the rail portion 15a. The rail members 15 can be lifted up and down with respect to the bracket 11 by being received by contact and rotating by the cam followers 12, 13.
なお、通常は、上記モーメントＭは第１図に示すよう
に、この図において時計回りのモーメントが作用するの
であるが、何らかの外力が加わって反対方向のモーメン
トが作用する場合に備えて、レール部15aを挟んで上記
両カムフォロア12,13の反対側に、それぞれストッパ18,
18がブラケット11に固設されている。Normally, the moment M acts as a clockwise moment in this figure as shown in FIG. 1. However, in case the moment in the opposite direction acts due to some external force, the rail portion On both sides of the cam followers 12 and 13 with the 15a interposed, stoppers 18 and
18 is fixed to the bracket 11.
以上のようにして、ブラケット11に対してレール部材
15が昇降自在に支持されており、この結果、支持部材６
に対して作業台７が昇降自在となる。As described above, the rail member is attached to the bracket 11.
15 is supported so that it can move up and down, and as a result, the support member 6
On the other hand, the workbench 7 can be moved up and down.
この作業台７の昇降は、支持部材６を構成する板材6
b,6cと、作業台７に固設されたブラケット7b,7cとの間
に取り付けられた昇降機構20により行われる。The lifting and lowering of the workbench 7 is performed by the plate member 6 that constitutes the support member 6.
This is performed by a lifting mechanism 20 mounted between b and 6c and brackets 7b and 7c fixed to the workbench 7.
この昇降機構20はシリンダチューブ21およびこれに嵌
入されたピストンロッド22からなる昇降シリンダを有
し、このピストンロッド22の上端22aは上記ブラケット7
bにピン結合されている。シリンダチューブ21の上側部
および下端部にそれぞれ回転自在にスプロケット（シー
ブ）23,24が取り付けられており、各スプロケット23,24
には２点鎖線で示すようにチェーン25,26が掛け回され
ている。一方のチェーン25の一端25aはブラケット7cに
固定され、他端25bは板材6cに固定されており、他方の
チェーン26の一端26aはブラケット7bに固定され、他端
は板材6cに固定されている。なお、上記ブラケット7cは
シリンダチューブ21の下端部が上下に移動するようにガ
イドする役割も果たす。The elevating mechanism 20 has an elevating cylinder composed of a cylinder tube 21 and a piston rod 22 fitted therein, and an upper end 22a of the piston rod 22 has an upper end 22a.
Pinned to b. Sprockets (sheaves) 23, 24 are rotatably attached to the upper and lower ends of the cylinder tube 21, respectively.
Chains 25 and 26 are wound around the chain as shown by the chain double-dashed line. One end 25a of one chain 25 is fixed to the bracket 7c, the other end 25b is fixed to the plate member 6c, one end 26a of the other chain 26 is fixed to the bracket 7b, and the other end is fixed to the plate member 6c. . The bracket 7c also serves to guide the lower end of the cylinder tube 21 so as to move vertically.
このような構成の昇降機構20において、昇降シリンダ
のピストンロッド22をシリンダチューブ21に対して相対
的に伸縮させると、この伸縮作動が２本のチェーン25,2
6を介して作業台７に伝達され、支持部材６に対して作
業台７を昇降移動させることができる。In the lifting mechanism 20 having such a structure, when the piston rod 22 of the lifting cylinder is expanded and contracted relative to the cylinder tube 21, this expansion and contraction operation causes the two chains 25, 2 to move.
It is transmitted to the work table 7 via 6 and the work table 7 can be moved up and down with respect to the support member 6.
ハ．考案の効果 以上説明したように、本考案によれば、支持部材に固
設された各ブラケットにそれぞれ取り付けられた各一対
のカムフォロアが、作業台の同一外側面に上下に延びて
固設された板状レールを間に挟んで対向するとともに上
下に離れて位置し、作業台の重量を受けて作用するモー
メントをカムフォロアと板状レールとの当接により受け
るとともにカムフォロアにより前記板状レールおよびこ
れが固設された作業台の昇降を案内するようになってい
るので、レール部材は１枚の板材でよく、その構造を簡
単にすることができ、且つ軽量化を図ることができる。C. Effect of the Invention As described above, according to the present invention, a pair of cam followers attached to the brackets fixed to the supporting member are fixed to the same outer surface of the work table so as to extend vertically. The plate-shaped rails are opposed to each other with the plate-shaped rail sandwiched therebetween, and are vertically separated from each other. A moment acting on the weight of the workbench is applied by the contact between the cam follower and the plate-shaped rail, and the plate-shaped rail and the plate-shaped rail are fixed by the cam follower. Since the work table provided is guided to move up and down, the rail member may be a single plate member, the structure thereof can be simplified, and the weight can be reduced.
第１図および第２図は本考案に係る作業台昇降支持構造
回りを示す正面図および平面図、 第３図は上記作業台昇降支持構造において作業台の昇降
を行わせる昇降機構を示す斜視図、 第４図はこの作業台昇降支持構造を有した高所作業車を
示す正面図である。 ３……伸縮ブーム、５……ポスト部材 ６……支持部材、７……作業台 10……昇降支持構造、11……ブラケット 12……カムフォロア、15……レール部材 20……昇降シリンダ1 and 2 are a front view and a plan view showing the periphery of a workbench lifting support structure according to the present invention, and FIG. 3 is a perspective view showing a lifting mechanism for lifting and lowering the workbench in the workbench lifting support structure. FIG. 4 is a front view showing an aerial work vehicle having the workbench lifting support structure. 3 ... Telescopic boom, 5 ... Post member 6 ... Support member, 7 ... Workbench 10 ... Lift support structure, 11 ... Bracket 12 ... Cam follower, 15 ... Rail member 20 ... Lift cylinder
Claims (1)
た支持部材に作業台を昇降可能に取り付けるための高所
作業車の作業台昇降支持構造であって、 前記作業台の同一外側面に上下に延びて平行に固設され
た一対の板状レールと、これら各板状レールに対向して
配設されるとともに互いに平行に延びて前記支持部材に
固設された一対のブラケットと、これら各ブラケットに
それぞれ前記板状レールを間に挟んで互いに対向すると
ともに上下に離れて取り付けられた各一対のカムフォロ
アとからなり、 前記各一対のカムフォロアは、前記作業台の重量を受け
て前記支持部材側に作用するモーメントを、前記板状レ
ールとの当接により受ける位置に配設され、前記板状レ
ールに当接した状態の前記カムフォロアにより前記板状
レールが固設された前記作業台の昇降を案内するように
構成された高所作業車の作業台昇降支持構造。1. A work platform lifting support structure for an aerial work vehicle for mounting a work table on a support member attached to a tip of a boom of the aerial work vehicle, the work table elevating and lowering structure being the same outside surface of the work table. A pair of plate-shaped rails extending vertically and fixed in parallel to each other, and a pair of brackets that are arranged so as to face each plate-shaped rail and extend in parallel to each other and are fixed to the support member. Each of the brackets includes a pair of cam followers attached to each other so as to face each other with the plate rail interposed therebetween and to be vertically separated from each other. The pair of cam followers receives the weight of the workbench and supports the support. The cam follower is arranged at a position where it receives a moment acting on the member side by contact with the plate-shaped rail, and the plate-shaped rail is fixed by the cam follower in a state of contacting with the plate-shaped rail. Worktable elevating support structure configured Aerial to guide the worktable elevating the.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2995990U JPH0810591Y2 (en) | 1990-03-23 | 1990-03-23 | Work platform lift support structure for aerial work platforms |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2995990U JPH0810591Y2 (en) | 1990-03-23 | 1990-03-23 | Work platform lift support structure for aerial work platforms |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03122093U JPH03122093U (en) | 1991-12-12 |
| JPH0810591Y2 true JPH0810591Y2 (en) | 1996-03-29 |
Family
ID=31532702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2995990U Expired - Lifetime JPH0810591Y2 (en) | 1990-03-23 | 1990-03-23 | Work platform lift support structure for aerial work platforms |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0810591Y2 (en) |
-
1990
- 1990-03-23 JP JP2995990U patent/JPH0810591Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03122093U (en) | 1991-12-12 |
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