BOOM SPRAYING DEVICE AND FLUID PRESSURE CYLINDER FOR BOOM OPENING/CLOSING

• Main Authors: OTA ATSUSHI, HATAKEYAMA AYAKA, YASUDA HIDEAKI
• Format: Patent
• Language: English; Japanese
• Published: 31.10.2023
• Subjects: AGRICULTURE; ANIMAL HUSBANDRY; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUSPLANTS; BLASTING; CATCHING, TRAPPING OR SCARING OF ANIMALS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR; FISHING; FLUID-PRESSURE ACTUATORS; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS; FORESTRY; HEATING; HUMAN NECESSITIES; HUNTING; HYDRAULICS OR PNEUMATICS IN GENERAL; LIGHTING; MECHANICAL ENGINEERING; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; TRAPPING; WEAPONS

To provide a boom spraying device capable of relieving impact between booms when opening/closing a boom and of layout in a relatively simple structure by lowering opening/closing speed of the boom only at the fully-opened and folded (completely closed) areas without lowering opening/closing speed of booms other than near the fully-opened and folded (completely closed) areas.SOLUTION: Portions opposed to ports 23A, 23B in a piston 26 when a second boom (a tip boom 46) is fluctuated and displaced to a prescribed posture (an unfolded posture E, a folded posture F) with respect to a first boom (an original boom 44) are provided with tapered face parts 26A, 26B which are tapered (a diameter is reduced) in an axial direction of a cylinder 20.SELECTED DRAWING: Figure 3 【課題】開き切りおよび折りたたみ（閉じ切り）付近以外のブームの開閉速度を低下させることなく、開き切りおよび折りたたみ（閉じ切り）付近だけでブームの開閉速度を減少させることで、ブーム開閉時におけるブーム同士の衝撃を緩和できるとともに、比較的簡単な構造でレイアウトが可能なブーム散布装置及びブーム開閉用の流体圧シリンダを提供する。【解決手段】第２ブーム（先ブーム４６）を第１ブーム（元ブーム４４）に対して所定の姿勢（展開姿勢Ｅ、折りたたみ姿勢Ｆ）に揺動変位させるときにピストン２６においてポート２３Ａ，２３Ｂに対向する部分に、シリンダ２０の軸方向に向けて先細となる（縮径する）テーパ面部２６Ａ，２６Ｂが設けられている。【選択図】図３