WO2014040331A1 - 一种悬吊器 - Google Patents

一种悬吊器 Download PDF

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Publication number
WO2014040331A1
WO2014040331A1 PCT/CN2012/082861 CN2012082861W WO2014040331A1 WO 2014040331 A1 WO2014040331 A1 WO 2014040331A1 CN 2012082861 W CN2012082861 W CN 2012082861W WO 2014040331 A1 WO2014040331 A1 WO 2014040331A1
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WO
WIPO (PCT)
Prior art keywords
rope
hole
suspension
working rope
stringing
Prior art date
Application number
PCT/CN2012/082861
Other languages
English (en)
French (fr)
Inventor
何少敦
Original Assignee
He Shaodun
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by He Shaodun filed Critical He Shaodun
Publication of WO2014040331A1 publication Critical patent/WO2014040331A1/zh

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B1/00—Devices for lowering persons from buildings or the like
    • A62B1/06—Devices for lowering persons from buildings or the like by making use of rope-lowering devices
    • A62B1/14—Devices for lowering persons from buildings or the like by making use of rope-lowering devices with brakes sliding on the rope

Definitions

  • the present invention relates to a suspension, and more particularly to a suspension that is manually controlled by gravity of the human body.
  • Today's 8-word ring hangers are characterized by simple structure and easy operation. Therefore, they are widely used in rock climbing, caving, aerial work, and high-altitude ropes.
  • the disadvantage of the existing 8-word ring hanger is self-locking. It is difficult to apply a constant pulling force to the free end of the working rope to control the descending speed. If it is necessary to hover in the air for a long time, the free end of the working rope must be fixed; therefore, due to inconvenience in operation, For those who have no professional training, there is a certain safety hazard when using the existing 8-word ring hanger.
  • the utility model provides a suspension device, wherein a U-shaped stringing member is arranged on the hanging body, a U-shaped opening of the U-shaped stringing member and a hanging body constitute a threading hole, and a hanging rope member is further arranged on the hanging body,
  • the hanging hole carrying the weight of the human body is disposed at a position biased to one side, and a control handle for controlling the deflection of the hanger is also provided.
  • the working rope When in use, the working rope passes through the stringing hole and bypasses the roping member, and the fixed end of the working rope is fixed at At the height, the free end of the working rope hangs down to the lower part, and the human body is fixedly connected with the hanging hole; when the human body is separately suspended by the hanging hole, the working rope fixed end and the free end of the working rope are pressed against each other to block the working rope Sliding, the human body hovering at a high place, the suspension is in a self-locking state; when the human body applies a pulling force to the suspension through the control handle, the suspension is deflected to make the fixed end of the working rope and the free end of the working rope The pressure is reduced, or the two are separated, the rope begins to slide, and the body descends.
  • the suspension device is composed of a hanging body having a hanging hole and a U-shaped stringing member disposed on the hanging body, and the U-shaped opening of the U-shaped stringing member and the hanging body constitute a stringing hole.
  • a roping member is further disposed on the hanging body, the hanging hole is disposed at a position offset to one side, and a control handle for controlling the deflection of the suspension is further disposed on the other side of the hanging body, and the working rope passes through the stringing hole And bypassing the roping piece, the fixed end of the working rope is fixed at a high position through the stringing hole, and the free end of the working rope is drooped to a low position through the stringing hole, and the human body is fixedly connected with the hanging hole through the connecting piece, when the human body is separately supported by the hanging hole
  • the fixed end of the working rope and the free end of the working rope are in contact with each other and pressed to prevent the working rope from sliding, so that the human body is hovering, and the suspension occurs when the human body exerts a pulling force on the suspension through the control handle. Deflection, the pressure between the fixed end of the working rope and the free end of the working rope is reduced, or the two are separated, the rope starts to slide, and the human
  • the preferred embodiment of the present invention is: the U-shaped stringing member is formed by bending a circular steel material, the hanging body is provided with a fixing insertion hole, and two pins of the U-shaped stringing member are respectively inserted into the fixing insertion hole The holes are fixed by welding.
  • the roping member and the suspension body are integrally cast.
  • the roping member is fixed to the suspension body by welding.
  • the hanger is a double rope suspension, and a first U-shaped stringing member and a second U-shaped stringing member are respectively disposed on the two sides of the hanging body.
  • the first U-shaped stringing member and the U-shaped opening and the hanging body of the second U-shaped stringing member respectively constitute a first threading hole and a second threading a rope hole, the first working rope passes through the first threading hole and bypasses the first rope member, and the first working rope fixing end is fixed at a height through the first threading hole, and the first working rope free end passes through the first
  • the threading hole is drooped to a low position; likewise, the second working rope passes through the second threading hole and bypasses the second rope member, and the second working rope fixing end is fixed at a height through the second threading hole, second The free end of the working rope hangs down to the lower position through the second stringing hole.
  • the utility model has the beneficial effects that the suspension device of the invention has the self-locking function of the suspension device, which can ensure the safety of the user, by providing a steering handle biased to one side lifting hole and operating the suspension deflection; When descending, simply apply the handle to the hanger
  • the suspension can be deflected to release the self-locking and lower the human body, and the operation is simple and convenient.
  • FIG. 1 , FIG. 2 and FIG. 3 are schematic structural views of a conventional 8-word ring type suspension device;
  • FIG. 1 is a schematic view of a three-dimensional structure,
  • FIG. 2 is a schematic view of a planar structure, and
  • FIG. 3 is a schematic view of the structure in use.
  • FIG. 5, FIG. 6, FIG. 7, and FIG. 8 are schematic structural views of a first embodiment of the present invention; wherein FIG. 4, FIG. 5, and FIG. 6 are schematic structural views, wherein FIG. 4 and FIG. 6 are perspective views, and FIG. Figure 7 and Figure 8 are schematic views of the structure in use.
  • Figure 9 is a schematic view showing the structure of a second embodiment of the present invention.
  • U-shaped stringing device 2A first U-shaped stringing member, 2B second U-shaped stringing member, 2. 1, 2. 2 pins;
  • Figure 1, Figure 2, Figure 3 are schematic diagrams of the structure of the existing 8-word ring suspension;
  • Figure 1 is a schematic view of the three-dimensional structure,
  • Figure 2 is a schematic view of the planar structure, and
  • Figure 3 is a schematic view of the structure in use.
  • the existing 8-word ring hanger is composed of a hanging body 1 having a stringing hole 1.1 and a hanging hole 1.
  • Figure 3 is a schematic view of the structure in use
  • Figure 3 shows that, in use, the working rope passes through the stringing hole 1.1 and is sleeved on the waist 1.3 of the hanging body, and the fixed end 3.1 of the working rope is fixed at the height of the stringing hole 1.1
  • the free end 3.2 of the working rope hangs down to the lower side through the stringing hole 1.1
  • the human body 5 is connected and fixed to the hanging hole 1.2 through the connecting member 4.
  • the existing 8-word ring hanger has difficulty in self-locking, the user must apply a constant pulling force to the free end 3.2 of the working rope to control the descending speed during the descending process. If it is necessary to hover for a long time, it must be Fixing the free end of the working rope, therefore, due to the inconvenience of operation, there is a certain safety when using it without professional training. Hidden dangers.
  • FIG. 5, FIG. 6, FIG. 7, and FIG. 8 are schematic structural views of a first embodiment of the present invention; wherein FIG. 4, FIG. 5, and FIG. 6 are schematic structural views, wherein FIG. 4 and FIG. 6 are perspective views, and FIG. Figure 7 and Figure 8 are schematic views of the structure in use.
  • the suspension is composed of a hanging body 1 having a hanging hole 1.2 and a U-shaped stringing member 2 provided on the hanging body, and the U-shaped stringing member 2
  • the lifting body is provided with fixed sockets 1.5.1, 1.5.2, and the two pins 2.1 and 2.2 of the U-shaped stringing device are inserted into the fixing jacks 1.5.1 and 1.5.2 respectively.
  • the welding is fixed on the hanging body 1.
  • the U-shaped opening of the U-shaped stringing member 2 forms a threading hole 1.1 between the hanging body, and the hanging body 1 is further provided with a roping member 6, the roping member 6 and the hanging body 1
  • the lifting hole 1.2 is disposed at a position biased to one side, and the other side of the hanging body 1 is further provided with a steering handle 1.4 for controlling the deflection of the hanger.
  • Figure 7 and Figure 8 are schematic views of the structure in use.
  • Figure 7 shows that, in use, the working rope passes through the stringing hole 1.1 and bypasses the roping member 6, and the working cord fixing end 3.1 is fixed at a height through the stringing hole 1.1.
  • Inside, the fixed end of the working rope 3.1 and the free end of the working rope 3. 2 are in contact with each other and pressed, preventing the working rope from sliding, so that the human body is hovering, and the suspension is in a self-locking state.
  • the working rope fixed end 3.1. 1 The inside of the threading hole 1.1, the working rope fixed end 3. 1
  • the pressure between the two ends of the working rope is reduced, or the two are separated, the rope starts to slide, and the human body descends; when the human body 5 needs to slow down or stop falling during the descending process, the manipulation can be reduced.
  • the two of the working ropes are fixed to each other. Pressing, the pressure between the two increases, preventing the working rope from sliding, slowing down the body 5 or suspending the human body in the air.
  • Figure 9 is a schematic view showing the structure of a second embodiment of the present invention.
  • the figure shows that, unlike the first embodiment, the present embodiment is a double rope type suspension.
  • a first U shape is respectively disposed on each of the two sides of the hanging body 1.
  • the stringing member 2A and the second U-shaped stringing member 2B, the U-shaped opening of the first U-shaped stringing member 2A and the hanging body 1 constitute a first threading hole 1.1A, and the U-shaped opening of the second U-shaped stringing member 2B
  • the mouth and the hanging body 1 constitute a second threading hole 1.1B, and the first winding member 6A and the second winding member 6B are further disposed on the hanging body 1; in use, the first working rope is taken from the first threading hole 1.1A passes through and bypasses the first roping member 6A, the first working cord fixing end is fixed at a high position via the first threading hole 1.1A, and the free end of the first working rope is drooped to the low side through the first stringing hole 1.1A Similarly, the second working rope is passed through the second stringing hole 1.1B and bypasses the second roping member 6B, and the second working cord fixing end is fixed at a height through the second stringing hole 1.1B, second The
  • the suspension can be controlled by providing a drawstring on the other side of the hanger, and the object of the present invention can be achieved as long as the manipulation of the suspension deflection can be controlled.
  • the U-shaped stringing member and the hanging body may be fixed in other known forms in addition to welding.
  • the present invention suggests that in other embodiments, in addition to integral casting between the roping member and the suspension, other known fastening means including welding may be employed.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Emergency Lowering Means (AREA)
  • Load-Engaging Elements For Cranes (AREA)

Abstract

一种悬吊器由吊体（1）及设置在吊体（1）上的U形穿绳件（2）构成，U形穿绳件（2）的U形口与吊体（1）构成穿绳孔（1.1），吊体（1）上还设置有绕绳件（6），吊孔（1.2）设置在偏向一侧的位置，用于承载人体重量，吊体（1）的另一侧还设置有控制悬吊器偏转的操控手柄（1.4），使用时，工作绳从穿绳孔穿过并绕过绕绳件（6），工作绳固定端（3.1）固定在高处，工作绳自由端（3.2）下垂至低处，人体（5）与吊孔（1.2）连接固定；当人体（5）单独由吊孔（1.2）承吊时，工作绳固定端（3.1）与工作绳自由端（3.2）两者之间由于相互压紧、阻止工作绳滑行，人体（5）悬停在高处、悬吊器处于自锁状态；当人体（5）通过操控手柄（1.4）对悬吊器施加拉力时，悬吊器发生偏转使工作绳固定端（3.1）与工作绳自由端（3.2）两者之间的压力减小、或使两者分离，绳子开始滑行、人体（5）下降。该悬吊器解决了现今8字环式悬吊器自锁有困难、使用时存在一定安全隐患的问题。

Description

一种悬吊器
技术领域
本发明涉及一种悬吊器， 尤其涉及一种以人体自身重量为重力、 通过手工控制的悬吊器。
背景技术
现今 8字环式悬吊器的特点是结构简单， 操作简便， 因此在攀岩、 探洞、 高空作业、 高空绳索下降等 都有广泛应用， 现有 8字环式悬吊器的缺点是自锁有困难， 使用时人们必须对工作绳自由端施加持续的拉 力才能控制下降速度， 如果需要长时间在空中说悬停， 必须将工作绳自由端进行固定处理； 因此， 由于操作 上的不方便， 对于没有受过专业训练的人员来讲， 使用现有 8字环式悬吊器存在一定的安全隐患。
发明内容 书
为了解决现今 8字环式悬吊器自锁有困难、 使用时存在一定安全隐患的缺点。 本发明提出的一种悬吊 器， 在吊体上设置 U形穿绳件， U形穿绳件的 U形口与吊体构成穿绳孔， 在吊体上还设置有绕绳件， 将 承载人体重量的吊孔设置在偏向一侧的位置， 还设置有控制悬吊器偏转的操控手柄， 使用时， 工作绳从穿 绳孔穿过并绕过绕绳件， 工作绳固定端固定在高处， 工作绳自由端下垂至低处， 人体与吊孔连接固定； 当 人体单独由吊孔承吊时， 工作绳固定端与工作绳自由端两者之间由于相互压紧、 阻止工作绳滑行， 人体悬 停在高处、 悬吊器处于自锁状态； 当人体通过操控手柄对悬吊器施加拉力时， 悬吊器发生偏转使工作绳固 定端与工作绳自由端两者之间的压力减小、 或使两者分离， 绳子开始滑行、 人体下降。
本发明解决问题的技术方案是， 悬吊器由具有吊孔的吊体以及设置在吊体上的 U形穿绳件构成， U形 穿绳件的 U形口与吊体构成穿绳孔， 在吊体上还设置有绕绳件， 所述吊孔设置在偏向一侧的位置， 在吊体 的另一侧还设置有控制悬吊器偏转的操控手柄， 工作绳从穿绳孔穿过并绕过绕绳件， 工作绳固定端经穿绳 孔固定在高处， 工作绳自由端经穿绳孔下垂至低处， 人体通过连接件与吊孔连接固定， 当人体单独由吊孔 承吊时， 工作绳固定端与工作绳自由端两者之间互相接触并压紧， 阻止工作绳滑行，使人体处于悬停状态， 当人体通过操控手柄对悬吊器施加拉力时悬吊器发生偏转， 使工作绳固定端与工作绳自由端两者之间的压 力减小、 或使两者分离， 绳子开始滑行、 人体下降。
本发明的优选方案是： 所述 U形穿绳件为圆形钢材弯曲而成， 所述吊体上设置有固定插孔， 所述 U 形穿绳件的两个插脚分别插入所述固定插孔当中并焊接固定。
本发明的优选方案是： 所述绕绳件与吊体为一体式浇铸。
本发明的优选方案是： 所述绕绳件以焊接的方式与吊体固定。
本发明的优选方案是：悬吊器为双绳式悬吊器，在所述吊体的两个面上分别各设置有第一 U形穿绳件、 第二 U形穿绳件， 所述第一 U形穿绳件、 第二 U形穿绳件的 U形口与吊体分别构成第一穿绳孔、 第二穿 绳孔， 第一工作绳从第一穿绳孔穿过并绕过第一绕绳件， 第一工作绳固定端经第一穿绳孔固定在高处， 第 一工作绳自由端经第一穿绳孔下垂至低处； 同样， 第二工作绳从第二穿绳孔穿过并绕过第二绕绳件， 第二 工作绳固定端经第二穿绳孔固定在高处， 第二工作绳自由端经第二穿绳孔下垂至低处。
本发明的有益效果是， 本发明提出的悬吊器， 由于设置偏向一侧吊孔和操作悬吊器偏转的操控手柄，使悬 吊器具有自锁功能， 能确保使用者的安全； 当需要下降时， 只需通过操控手柄对悬吊器施加
拉力， 使悬吊器发生偏转即可解除自锁并使人体下降， 操作简单方便。
附图说明 图 1、 图 2、 图 3为现有 8字环式悬吊器的结构示意图； 其中图 1为立体结构示意图、 图 2平面结构 示意图， 图 3为使用时的结构示意图。
图 4、 图 5、 图 6、 图 7、 图 8为本发明第一个实施例的结构示意图； 其中图 4、 图 5、 图 6结构示意 图， 其中图 4、 图 6为立体图， 图 5为平面图； 图 7、 图 8为使用时的结构示意图。
图 9为本发明第二个实施例的结构示意图。
图中：
1.吊体， 1. 1穿绳孔， 1. 1A第一穿绳孔， 1. 1B第二穿绳孔， 1. 2吊孔， 1. 3腰部， 1. 4操控手柄， 1. 5. 1、 1. 5. 2固定插孔；
2. U形穿绳件， 2A第一 U形穿绳件， 2B第二 U形穿绳件， 2. 1、 2. 2插脚；
3. 1工作绳固定端， 3. 2工作绳自由端；
4.连接件；
5.人体， 5. 1人手。
6绕绳件、 6A第一绕绳件、 6B第二绕绳件，
具体实施方式
图 1、 图 2、 图 3为现有 8字环式悬吊器的结构示意图； 其中图 1为立体结构示意图、 图 2平面结构 示意图， 图 3为使用时的结构示意图。
图 1、 图 2中显示， 现有 8字环式悬吊器由具有穿绳孔 1. 1、 吊孔 1. 2的吊体 1构成。
图 3为使用时的结构示意图， 图 3中显示， 使用时， 工作绳从穿绳孔 1.1中穿过并套接在吊体腰部 1.3 上， 工作绳固定端 3.1经穿绳孔 1.1固定在高处， 工作绳自由端 3.2经穿绳孔 1.1下垂至低处， 人体 5通过 连接件 4与吊孔 1.2连接固定。 使用时， 由于现有 8字环式悬吊器自锁有困难， 因此使用者在下降过程中， 必须对工作绳自由端 3.2施加持续的拉力才能控制下降速度， 如果需要长时间悬停， 必须将工作绳自由端 进行固定处理， 因此， 由于操作上的不方便， 对于没有受过专业训练的人员来讲， 使用时存在一定的安全 隐患。
图 4、 图 5、 图 6、 图 7、 图 8为本发明第一个实施例的结构示意图； 其中图 4、 图 5、 图 6结构示意 图， 其中图 4、 图 6为立体图， 图 5为平面图； 图 7、 图 8为使用时的结构示意图。
图 4、 图 5、 图 6中显示， 在本实施例中， 悬吊器由具有吊孔 1.2的吊体 1以及设置在吊体上的 U形 穿绳件 2构成， U形穿绳件 2为圆形钢材弯曲而成， 吊体上设置有固定插孔 1.5.1、 1.5.2， U形穿绳件的两 个插脚 2.1、 2.2分别插入固定插孔 1.5.1、 1.5.2当中并焊接固定在吊体 1上， U形穿绳件 2的 U形口与吊 体之间构成穿绳孔 1.1， 在吊体 1上还设置有绕绳件 6， 绕绳件 6与吊体 1为一体式浇铸， 所述吊孔 1.2设 置在偏向一侧的位置， 在吊体 1的另一侧还设置有控制悬吊器偏转的操控手柄 1.4。
图 7、 图 8为使用时的结构示意图， 图 7显示， 使用时， 工作绳从穿绳孔 1.1穿过并绕过绕绳件 6， 工 作绳固定端 3.1经穿绳孔 1.1固定在高处， 工作绳自由端 3.2经穿绳孔 1.1下垂至低处， 人体 5通过连接件 4与吊孔 1.2连接固定； 当人体 5单独由吊孔 1. 2承吊时， 在穿绳孔 1. 1里面， 工作绳固定端 3. 1与工作 绳自由端 3. 2两者之间互相接触并压紧， 阻止工作绳滑行， 使人体处于悬停状态， 悬吊器处于自锁状态。
图 8中显示， 当需要下降时， 人手 5. 1通过操控手柄 1. 4对悬吊器施加向下拉力， 悬吊器偏转， 在穿 绳孔 1. 1里面， 工作绳固定端 3. 1与工作绳自由端 3. 2两者之间的压力减小、 或者两者之间分离， 绳子开 始滑行、 人体下降； 当人体 5在下降过程中需要减缓速度或停止下降， 可以减小对操控手柄 1. 4施加的向 下拉力， 此时悬吊器将往反方向偏转， 使穿绳孔 1. 1里面的工作绳固定端 3. 1与工作绳自由端 3. 2两者之 间互相压紧， 使两者之间的压力增大， 阻止工作绳滑行， 使人体 5下降的速度减缓或使人体悬停在空中。
图 9为本发明第二个实施例的结构示意图。 图中显示， 与第一个实施例不同的是， 本实施例为双绳式 悬吊器，在本实施例中，在所述吊体 1的两个面上分别各设置有第一 U形穿绳件 2A、第二 U形穿绳件 2B, 第 一 U形穿绳件 2A的 U形口与吊体 1构成第一穿绳孔 1.1A, 第二 U形穿绳件 2B的 U形口与吊体 1构成第二穿 绳孔 1.1B ,在吊体 1上还设置有第一绕绳件 6A、第二绕绳件 6B ;使用时，将第一工作绳从第一穿绳孔 1.1A 穿过并绕过第一绕绳件 6A， 第一工作绳固定端经第一穿绳孔 1.1A固定在高处， 第一工作绳自由端经第一 穿绳孔 1.1A下垂至低处； 同样， 将第二工作绳从第二穿绳孔 1.1B穿过并绕过第二绕绳件 6B， 第二工作绳 固定端经第二穿绳孔 1.1B固定在高处， 第二工作绳自由端经第二穿绳孔 1.1B下垂至低处； 最后， 人体 5 通过连接件 4与吊孔 1.2连接固定。 本发明提示， 本实施例的双绳悬吊器由于采用双绳， 可适用于悬吊重 量更大的物体。
本发明提示， 在其它实施例中， 可以采用在吊孔的另一侧设置拉绳的方式来控制悬吊器偏转， 只要能 够控制悬吊器偏转的操控方式就可以实现本发明的目的。
本发明提示， 在其它实施例中， U形穿绳件与吊体之间除了采用焊接的方式之外， 也可以采用其它公 知的形式固定。 本发明提示， 在其它实施例中， 绕绳件与吊体之间除了采用一体式浇铸之外， 也可以采用包括焊接在 内的其它公知固定方式。

Claims

权 利 要 求 书
1. 一种悬吊器， 其特征是， 悬吊器由具有吊孔的吊体以及设置在吊体上的 U形穿绳件构成， U形穿绳件 的 U形口与吊体构成穿绳孔， 在吊体上还设置有绕绳件， 所述吊孔设置在偏向一侧的位置， 在吊体的另一 侧还设置有控制悬吊器偏转的操控手柄， 工作绳从穿绳孔穿过并绕过绕绳件， 工作绳固定端经穿绳孔固定 在高处，工作绳自由端经穿绳孔下垂至低处，人体通过连接件与吊孔连接固定， 当人体单独由吊孔承吊时， 工作绳固定端与工作绳自由端两者之间互相接触并压紧， 阻止工作绳滑行， 使人体处于悬停状态， 当人体 通过操控手柄对悬吊器施加拉力时悬吊器发生偏转， 使工作绳固定端与工作绳自由端两者之间的压力减 小、 或使两者分离， 绳子开始滑行、 人体下降。
2. 根据权利要求 1所述的悬吊器， 其特征是， 所述 U形穿绳件为圆形钢材弯曲而成， 所述吊体上设置有 固定插孔， 所述 U形穿绳件的两个插脚分别插入所述固定插孔当中并焊接固定。
3. 根据权利要求 1所述的悬吊器， 其特征是， 所述绕绳件与吊体为一体式浇铸。
4. 根据权利要求 1所述的悬吊器， 其特征是， 所述绕绳件以焊接的方式与吊体固定。
5. 根据权利要求 1所述的悬吊器， 其特征是， 悬吊器为双绳式悬吊器， 在所述吊体的两个面上分别各设 置有第一 U形穿绳件、 第二 U形穿绳件， 所述第一 U形穿绳件、 第二 U形穿绳件的 U形口与吊体分别构 成第一穿绳孔、 第二穿绳孔， 第一工作绳从第一穿绳孔穿过并绕过第一绕绳件， 第一工作绳固定端经第一 穿绳孔固定在高处， 第一工作绳自由端经第一穿绳孔下垂至低处； 同样， 第二工作绳从第二穿绳孔穿过并 绕过第二绕绳件， 第二工作绳固定端经第二穿绳孔固定在高处， 第二工作绳自由端经第二穿绳孔下垂至低 处。
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