JPS644789Y2

JPS644789Y2 -

Info

Publication number: JPS644789Y2
Application number: JP6292484U
Authority: JP
Priority date: 1984-04-26
Filing date: 1984-04-26
Publication date: 1989-02-07
Also published as: JPS60173591U

Description

【考案の詳細な説明】〔目的〕ブームに俯仰のみを行わせるデリツククレーン
が、鉄塔組立に広く使用されているが、本考案は
簡単な改良によつてブームに旋回も行わせるよう
にしたもである。[Detailed explanation of the invention] [Purpose] Derrick cranes, whose booms only tilt upwards and upwards, are widely used for assembling steel towers, but the present invention uses simple improvements to allow the booms to swing as well. It is.

〔composition〕

図面について実施例を説明する。 Examples will be described with reference to the drawings.

台座１は鉄塔へ水平に固定されている。クレビ
ス金具２は一端部を水平軸３で台座へ枢着され俯
仰可能である。またその他端にはクレビスを備
え、水平軸３と直角方向のクレビス軸４が設けて
ある。ブーム５は下端がクレビス軸４へ枢着され
旋回可能である。扇形ギア６はその中心がクレビ
ス軸４と一致するようにしてクレビス金具２に固
着してある。ブームには減速機付きのモータＭが
塔載されており、これによつて駆動するピニオン
７が扇形ギア６とかみ合う。モータＭはケーブル
を介し押ボタンスイツチで操作可能である。駆動
するピニオンはブームとともに扇形ギアに沿い回
動する。ブームの俯仰と吊荷の昇降は従来どおり
の方法で行う。 The pedestal 1 is horizontally fixed to the steel tower. The clevis fitting 2 has one end pivotally connected to a pedestal by a horizontal shaft 3 and is capable of being raised and lowered. Further, a clevis is provided at the other end, and a clevis shaft 4 is provided in a direction perpendicular to the horizontal shaft 3. The lower end of the boom 5 is pivotally connected to the clevis shaft 4 and is rotatable. The sector gear 6 is fixed to the clevis fitting 2 so that its center coincides with the clevis shaft 4. A motor M with a speed reducer is mounted on the boom, and a pinion 7 driven by the motor M meshes with the sector gear 6. The motor M can be operated by a push button switch via a cable. The driving pinion rotates along the sector gear together with the boom. Raising and raising the boom and raising and lowering the suspended load will be done in the conventional manner.

〔effect〕

俯仰のみが可能だつた従来のブームでは、吊荷
にロープを結び人力で所定位置へ引き寄せる方法
がとられた。しかし山岳地帯傾斜地ではこの作業
が著るしく困難となる。また鉄塔が100ｍを超す
高さとなると、吊荷の昇降ロープと引き寄せロー
プとのなす角が小さくなり、引き寄せが不能とな
る。この場合には鉄塔上作業者は直接昇降ロープ
を操作して吊荷を引き寄せる危険な作業を強いら
れた。本考案は以上の困難を払拭し、少数作業者
で安全に作業できるようにしたことが特徴であ
る。 With conventional booms that could only be lifted up and down, a rope was tied to the load and the load was manually pulled into place. However, this task becomes extremely difficult in mountainous and sloped areas. Furthermore, if the height of the steel tower exceeds 100 m, the angle between the hoisting rope and the pulling rope becomes small, making it impossible to pull the load. In this case, workers on the tower were forced to do the dangerous work of pulling the suspended load by directly operating the lifting rope. The present invention is characterized by eliminating the above-mentioned difficulties and allowing the work to be carried out safely by a small number of workers.

[Brief explanation of the drawing]

第１図は本考案の正面図、第２図は同平面図で
ある。１……台座、２……クレビス金具、３……水平
軸、４……クレビス軸、５……ブーム、６……扇
形ギア、７……ピニオン、Ｍ……モータ。 FIG. 1 is a front view of the present invention, and FIG. 2 is a plan view thereof. 1... Pedestal, 2... Clevis fitting, 3... Horizontal shaft, 4... Clevis shaft, 5... Boom, 6... Sector gear, 7... Pinion, M... Motor.

Claims

[Scope of utility model registration request]

a pedestal fixed to a steel tower; a clevis fitting having one end pivoted to the pedestal so that it can be lifted up and down with a horizontal axis and a clevis provided at the other end; a clevis shaft provided on the clevis in a direction perpendicular to the horizontal axis; a boom that is pivotally connected to the clevis shaft and can rotate; a fan-shaped gear centered on the clevis shaft and fixed to the clevis fitting;
A derrick boom rotation device that is driven by a motor mounted on the boom tower and consists of a fan-shaped gear and a pinion that meshes with it.