一種如伸縮臂叉車輛

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1、一種如伸縮臂叉車輛，人員的工作，其中涉及一種平臺（工作平臺）。 The personnel work platform includes a shut-off switch that is connected to the electronic controls for the extendible boom forklift.人事工作平臺涉及一種關閉開關，連接伸縮臂叉的有向電子控制。 The operational controls of the extendible boom forklift include a personnel work platform control system

2、 that modifies the operation of the extendible boom forklift when the forklift is in a PWP mode.伸縮臂叉車的操作控制涉及人事工作平臺控制系統，修改了伸縮臂叉的叉車操作時在工作籌劃模式。 The PWP control system receives inputs from the shut-off switch, a PWP system actuation switch, a service brake pressure switch and a level sensor/switch such

3、that the control system enables the PWP mode only upon satisfying certain safety-related concerns.工作籌劃控制系統接受來自切斷開關，工作系統驅動開關，制動壓力開關和服務水平傳感器/開關等，該系統只容許在滿足一定的安全有關的問題的工作籌劃模式的投入。 In the PWP mode, the control system engages the parking brake, declutches the transmission, locks the frame stabilizing cylind

4、er, deactivates the auxiliary and tilt hydraulic functions and limits the frame leveling rate to slow speeds.在工作籌劃模式，控制系統從事停車制動，傳播穩(wěn)定的框架鎖缸，停用和傾斜液壓輔助功能，并限制幀速率低速平。 BACKGROUND OF THE INVENTION發(fā)明背景 The present invention generally relates to a boom-type vehicle, such as an extendible boom forklift, as

5、is commonly used in construction, industrial, maintenance and repair applications.本發(fā)明波及一種普遍繁華型車輛，如一種伸縮臂叉，像人們一般用于建筑，工業(yè)，保養(yǎng)和維修中的應用。 More particularly, the present invention relates to a control system for such reach-type vehicle that is adapted for use in combination with a personnel work platform (PWP

6、) that can be used in combination with the reach-type vehicle.更具體地說，本發(fā)明波及一種達到這種類型的車輛控制系統，聯合使用了人事工作平臺（工作），可以結合使用的覆蓋面型車輛改裝。 Presently, extendible boom forklifts can be used with a separate personnel work platform such that the forklift can be used to raise and lower workers standing on the platform

7、based on various workplace requirements.目前，伸縮臂叉車可以使用一種單獨的人事工作平臺，使得叉車可用于提高和減少工人在不同的工作規(guī)定為基本的平臺的地位。 The personnel work platform typically includes a pair of tubular fork receivers that receive the forks of the forklift such that the personnel work platform is supported on the forks of the forklift.人事工作

8、平臺，一般涉及一種管狀交叉接受機接受的叉車叉，這樣的人事工作平臺上的支持對叉車叉。 Typically, an operator sits in the cab of the extendible boom forklift and raises and lowers the personnel work platform into the desired location.一般狀況下，操作員坐在伸縮臂叉車的駕駛室和提高，并減少到所需的位置人員的工作平臺。 Thus, the combination of the personnel work platform and the extendib

9、le boom forklift increase the number of functions the extendible boom forklift can perform at a workplace.因此，結合人事工作平臺和伸縮臂叉的增長某些功能的伸縮臂交叉可以執(zhí)行在工作場合。 Although the combination of the extendible boom forklift and the personnel work platform increase the utility of the extendible boom forklift, the worke

10、rs supported by the personnel work platform can be injured if the control functions of the extendible boom forklift are not modified when the personnel work platform is being used.盡管伸縮臂交叉組合和人事工作平臺增長伸縮臂交叉實用程序，由人事工作平臺所支持的工人受傷如果伸縮臂叉車的控制功能時，不會修改人事工作平臺正在使用。 For example, if workers are on the platform and

11、 the forklift is allowed to move or the fork assembly is allowed to rotate, or the forklift frame is not leveled correctly, the workers could become injured as a result of such movement.例如，如果工人在平臺上，并容許叉車交叉裝配移動或容許旋轉，或不平整叉車框架對的，工人也許成為由于這種運動的成果受傷。 Therefore, it is an object of the present invention t

12、o provide a control system for an extendible boom forklift or similar boom-type vehicle that limits the operation of the vehicle when the personnel work platform is being used.因此，它是本發(fā)明提供了一種類似的伸縮臂叉或臂式車輛，限制車輛操作人員的工作平臺時，正在使用的控制系統對象。 Further, it is an object of the present invention to provide relativel

13、y slow movement of the frame leveling cylinder when the personnel work platform is in use.此外，它是本發(fā)明的目的，以提供相對均衡的框架緩慢運動時，氣缸工作平臺的人員正在使用中。 A still further object of the invention is to provide a system for preventing movement of the vehicle and for providing controlled movement of the boom when the perso

14、nnel work platform is in use.該項發(fā)明的目的是進一步為避免車輛移動，并提供運動控制的熱潮時，工作人員使用的平臺是一種系統。 Further, it is an object of the present invention to incorporate a shut-off switch on the personnel work platform such that the workers standing on the personnel work platform can shut down operation of the vehicle boom from

15、 the work platform.此外，它是本發(fā)明的對象納入關閉對人事工作平臺切換，使得工人對工作人員站在平臺上可以關閉了從工作平臺車熱潮的運作。 Yet another object of the invention is to provide a PWP control system that locks the stabilizing cylinder of the forklift and prevents operation of auxiliary hydraulics when the forklift is in a PWP mode of operation.然而，另一種

16、發(fā)明的目的是提供一種控制系統，工作籌劃鎖定穩(wěn)定的叉車氣缸和避免操作時，輔助液壓叉車工作籌劃中的運作模式。 SUMMARY OF THE INVENTION本發(fā)明的概要 The present invention is a control system that modifies the operation of a boom-type vehicle, such as an extendible boom forklift, when the vehicle is being used in connection with a personnel work platform (PWP).

17、本發(fā)明是一種控制系統，修改，如伸縮臂叉，當車輛正在與一間人事工作平臺（工作）連接使用了一種繁華型車輛，經營。 The PWP control system of the present invention modifies the operation of the forklift to increase the safety of workers positioned on the work platform.本發(fā)明的工作籌劃控制系統修改了叉車作業(yè)，以增長對工人的安全工作平臺定位。 The PWP control system includes a shut-off switch tha

18、t is mounted near the work platform and a PWP system actuator switch.工作籌劃控制系統涉及關閉開關，接近工作平臺和工作系統的執(zhí)行器開關上。 The shut-off switch and PWP system actuator switch are interconnected with a control microprocessor included in the electronic operating circuit for the forklift.在關閉開關及工作籌劃系統互相連接器與開關控制微解決器中的電子工作電路

19、涉及叉車。 The control microprocessor is configured to selectively operate various operating components of the forklift in a PWP mode, which is different than the normal mode of operation.微解決器控制操作配備為選擇性的叉車工作籌劃中的多種操作模式，這是比一般的操作模式不同的組件。 The PWP system actuator switch is positioned in the cab of the forkl

20、ift and must be actuated for the PWP control system to enter the PWP mode.工作系統的執(zhí)行器開關是定位在叉車駕駛室和必須為工作籌劃控制系統進入工作籌劃模式驅動。 In addition to the actuation of the PWP system actuator switch, the microprocessor must detect the simultaneous actuation of the service brakes.除了工作系統的開關驅動器，微解決器必須檢測服務的剎??車同步驅動。 Speci

21、fically, the PWP system actuator switch and the service brakes must be simultaneously applied for a period of five seconds before the microprocessor allows the control system to enter the PWP mode.具體來說，工作系統執(zhí)行機構和服務剎車開關必須同步申請了五秒鐘內容許前微解決器控制系統進入工作籌劃模式。 Upon entering the PWP mode, the PWP control syste

22、m performs several functions to further ensure the safety of a worker on the personnel work platform.在進入工作籌劃模式下，工作籌劃控制系統執(zhí)行幾種功能，以進一步保證對人事工作平臺工人的安全。 Upon entering the PWP mode, the microprocessor sends a signal to the transmission controller, which causes the transmission of the forklift to declutch,

23、to prevent movement of the forklift.在進入工作籌劃模式下，微解決器發(fā)送到傳播控制器，從而導致了叉車傳播離合，以避免叉車的運動信號。 At the same time, the processor activates the parking brake and locks the rear axle stabilizing system of the forklift to provide a secure four-point stance.同步，解決器激活停車制動和鎖定后軸穩(wěn)定的叉車系統提供一種安全的四點立場。 Once the forklift en

24、ters the PWP mode, the PWP control system checks to determine whether the cab of the forklift is in a generally level orientation.一旦進入叉車工作籌劃模式下，工作籌劃控制系統檢查，以擬定與否叉車駕駛室在一般水平方向。 Specifically, a level sensor/switch in the cab provides a signal to the microprocessor indicating the orientation of the cab.具

25、體來說，A級傳感器/開關在駕駛室微解決器提供了一種批示方向的駕駛室信號。 If the sensor/switch determines that the cab is tilted one way or the other more than 2°, the microprocessor will disable operation of the forklift boom to prevent movement of the personnel work platform.如果傳感器/開關決定了駕駛室傾斜的一種方式或其她超過2 °，微解決器將禁用繁華的叉車操作，以避免人員的工作平臺運營。

26、 In addition to controlling various operational components of the forklift, the microprocessor causes a restriction in the flow of hydraulic fluid to the leveling cylinder of the forklift upon entering the PWP mode.除了控制各業(yè)務部門的叉車，微解決器導致在液壓流體流向的模式后，進入叉車工作平缸限制。 The flow restriction reduces the rate at

27、which the leveling cylinder operates to prevent a worker on the platform from being thrown from the platform due to a tip-over of the forklift caused by incorrect movement of the leveling cylinder.流量限制減少的速度調平缸工作，以避免被扔在平臺上的平臺工人由于針尖對由不對的的平缸運動所導致的叉車。 The PWP control system of the invention includes t

28、he shut-off switch that is mounted to the personnel work platform.本發(fā)明的控制系統涉及工作籌劃關閉互換機，安裝在人事工作平臺。 If a worker on the personnel work platform desires to prevent any further movement of the boom, the worker can depress the shut-off switch.如果對人事工作平臺的欲望工人，以避免任何進一步行動的熱潮，勞動者可以克制關閉開關。 When the shut-off swit

29、ch is moved to its OFF position, the microprocessor activates a joystick disengage solenoid that prevents any further movement of the boom.當關閉開關移動到OFF位置的，微解決器激活一種操縱桿脫離電磁鐵來避免任何進一步的運動熱潮。 Thus, a worker on the platform can prevent further movement of the platform by an operator in the forklift cab.因此，在

30、平臺上可以避免工人在叉車駕駛室操作平臺的進一步行動。 Various other features, objects and advantages of the invention will be made apparent from the following description taken together with the drawings.其她多種功能，對象和發(fā)明將作出明顯的優(yōu)勢，采用了從圖紙一并提供如下闡明。 BRIEF DESCRIPTION OF THE DRAWINGS簡要闡明圖紙 The drawings illustrate the best mode pr

31、esently contemplated of carrying out the invention.圖紙闡明目前的最佳模式貫徹發(fā)明設想。 In the drawings:在圖紙： FIG.圖1一 is an isometric view of a boom-type vehicle, in the form of an extendible boom forklift, including a personnel work platform (PWP) incorporating the subject matter of the present invention;是一種繁華型車輛

32、等距視圖在一種伸縮臂叉的形式，涉及人事工作平臺（工作平臺）納入本發(fā)明的標志物; FIG.圖二2二 is a partial perspective view of the shut-off switch mounted to the personnel work platform;是關閉安裝在人事工作平臺切換局部透視圖; FIG.圖3三 is a partial perspective view illustrating the control panel used to operate the boom-type vehicle and engage the modified PWP

33、 control system of the present invention;是局部透視圖闡明了用于操作控制面板的熱潮型車輛和修改后的工務籌劃進行，本發(fā)明控制系統; FIG.圖4四 is a schematic illustration of the PWP control system of the present invention; and是對本發(fā)明的工作籌劃控制系統示意圖 FIG.圖五 is a schematic diagram of the hydraulic circuit illustrating the speed control mechanism used to

34、 limit the frame leveling speed in accordance with the present invention, incorporated into the extendible boom vehicle of FIG.是闡明了速度的液壓控制機制用于限制在本發(fā)明根據框架練級速度，進入圖伸縮臂汽車納入電路原理圖。 DETAILED DESCRIPTION OF THE INVENTION發(fā)明的具體闡明 Referring to在談到 FIG.圖。 1一 , a vehicle in the form of an extendible boom forkli

35、ft ，在伸縮臂叉的形式車輛 10 10 generally includes a frame or chassis一般涉及一種框架或機箱 12 12 and a boom assembly大會和繁華 14 14 mounted to chassis安裝在機箱 12 12 . 。 Chassis底盤 12 12 includes a central frame member成員涉及中央幀 15 15 extending in a longitudinal front-rear direction.在縱向延伸的前后方向。 A pair of front ground-engaging wheel

36、s and tires一種前端地面車輪和輪胎對從事 18 18 are carried by a front axle assembly mounted toward the forward end of central frame member是由前橋總成進行安裝朝著前端中央幀成員 15 15 , and a pair of rear ground-engaging wheels and tires ，以及對后方地面從事車輪和輪胎 20 20 are mounted toward the rearward end of central frame member被安裝朝著中央后方結束幀成員 1

37、5 15 . A cab一種出租車 22 22 is mounted between front wheels前輪之間安裝 18 18 and rear wheels和后輪 20 20 on one side of central frame member在一成員方的中央框架 15 15 , and a drive train is mounted on the side of central frame member ，和驅動器安裝在列車中部的成員方框架 15 15 opposite cab相反駕駛室 22 22 . A pair of uprights一對立柱 24 24 are moun

38、ted to central frame member安裝到中央幀成員 15 15 toward its rearward end, rearwardly of cab其后方走向結束，駕駛室 22 22 and wheels和車輪 20 20 . A pair of lift cylinders對氣瓶的電梯 26 26 are located one on either side of frame位于任一側一幀 15 15 , and each lift cylinder ，每個升降油缸 26 26 is connected to chassis連接到機箱 12 12 via a pivot

39、connection which pivotably secures the cylinder end of the lift cylinder通過一種樞軸接頭，固定電梯的缸缸端 26 26 to chassis到機箱 12 12 for movement about a substantially horizontal pivot axis.約一種大大水平翻轉軸運動。 A pair of slave cylinders對氣瓶的奴隸 30 30 are also located one on either side of chassis也位于機箱側面任一 12 12 , and the cyl

40、inder end of each slave cylinder ，以及每個分泵缸端 30 30 is connected to chassis連接到機箱 12 12 via a pivot connection which provides pivoting movement of the slave cylinder通過一種支點連接，提供旋轉運動的分泵 30 30 about a substantially horizontal pivot axis.約一種大大水平翻轉軸Boom assembly臂總成 14 14 generally includes an outer boom memb

41、er一般涉及一種外部的繁華成員 32 32 and an intermediate boom member及一種中間臂成員 34 34 which is received within an internal passage defined by outer boom member這是由外內收到繁華成員定義一種內部通道 32 32 for telescoping inward and outward movement relative to outer boom member抵港及離港的伸縮運動外相對繁華的成員 32 32 . Boom assembly臂總成 14 14 further in

42、cludes an inner boom member還涉及一種內部成員熱潮 35 35 received within an internal passage defined by intermediate boom member由中間臂內收到成員定義一種內部通道 34 34 and is mounted for axial inward and outward telescoping movement relative to intermediate boom member并安裝軸向伸縮運動抵港及離港相對繁華的成員中間 34 34 . 。 A nose section一種機頭部分 36 3

43、6 is mounted to the forward end of the inner boom member是安裝在成員的內在動臂前端 35 35 , and is located forwardly of the forward end of chassis ，坐落在向前的機箱前端 12 12 . 。 A drive arrangement provides inward and outward movement of intermediate boom member A驅動器的方式，提供進出香港的中間臂運動成員 34 34 and the inner boom member內臂成員 3

44、5 35 to which nose section對于這些機頭部分 36 36 is mounted, in a manner as is known.安裝，在眾所周知的方式進行。A tool mounting assembly一種工具安裝方式 38 38 is pivotably mounted to the lower end of nose section是安裝在機頭部分的下端 36 36 , and a tilt cylinder (not shown) is interposed between nose section和一種傾斜缸（未顯示）機頭部分之間的中間人 36 36 and

45、 tool mounting assembly和工具安裝方式 38 38 . 。 Tool mounting assembly工具安裝方式 38 38 includes an arrangement for releasably engaging a tool with boom assembly涉及用于釋放地從事大會安排的工具 14 14 through nose section通過機頭部分 36 36 . 。 As shown in the drawings, personnel work platform (PWP)在圖紙上所示，人事工作平臺（工務） 42 42 is received

46、by a fork assembly是大會收到的叉子 43 43 mounted to the tool mounting assembly安裝在安裝裝配工具 38 38 . Boom assembly臂總成 14 14 includes a mounting structure涉及安裝構造 44 44 toward its rearward end.朝著后方結束。 Lift cylinder升降油缸 26 26 is engaged with mounting structure從事與安裝構造 44 44 via a pivot connection通過樞軸連接 46 46 , and sl

47、ave cylinder和分泵 30 30 is connected to mounting structure連接到安裝構造 44 44 via a pivot connection通過樞軸連接 48 48 . A pivot shaft一種支點軸 50 50 is operable to pivotably mount boom assembly是可操作工作支撐點14 14 to uprights到立柱 24 24 through mounting structure通過安裝構造 44 44 . Boom assembly臂總成 14 14 is pivotable about a piv

48、ot axis defined by the longitudinal axis of pivot shaft是有關軸的支點縱軸定義一種支點軸擺動 50 50 . With the arrangement as described above, boom assembly有了上述的安排，效率變高 14 14 is operable to lift the personnel work platform是可操作性解除人事工作平臺 42 42 . Extension of lift cylinders延長電梯缸 26 26 functions to pivot boom assembly大會樞紐功

49、能，繁華 14 14 upwardly about pivot shaft有關軸支點向上 50 50 to lift the personnel work platform解除人事工作平臺 42 42 and likewise retraction of cylinders同樣地回縮氣瓶 26 26 functions to lower the personnel work platform功能，以減少人事工作平臺 42 42 by allowing boom assembly大會通過容許熱潮 14 14 to pivot downwardly about pivot shaft以樞軸向下約樞

50、紐軸 50 50 . In a manner as is known, the rear axle assembly, to which rear wheels在眾所周知的方式，后橋總成，對此后輪 20 20 are mounted, is pivotable relative to central frame member在坐騎上，是相對于中央擺動架成員 15 15 to provide oscillating movement of wheels提供車輪擺動??運動 20 20 relative to chassis相對于底盤 12 12 as forklift作為叉車 10 10 tra

51、vels over uneven terrain.走遍平坦地形。 A stabilizing cylinder assembly一種穩(wěn)定汽缸組件 52 52 is interposed between central frame member畫面中央是成員之間的中間人 15 15 and the rear axle assembly, to cushion shocks which would otherwise be experienced by central frame member和后橋總成，以緩沖，否則會成員由中央幀經歷震蕩 15 15 and the components moun

52、ted thereto, such as cab和組件及其安裝，如駕駛室 22 22 and boom assembly和動臂總成 14 14 , during such oscillating movement of wheels ，在這樣的振蕩運動的車輪 20 20 relative to central frame member相對于中央幀成員 15 15 . 。 In在 FIG.圖。 1一 , stabilizing cylinder ，穩(wěn)定缸 52 52 is shown as being located at the left side of forklift體現為在叉車被左側 1

53、0 10 . In a similar manner, the front axle assembly, to which front wheels以類似的方式，前橋總成，對此前輪 18 18 are mounted, is pivotable relative to central frame member在坐騎上，是相對于中央擺動架成員 15 15 to provide oscillating movement of wheels提供車輪擺動??運動 18 18 as forklift作為叉車 10 10 travels over uneven terrain.走遍平坦地形。 A fram

54、e leveling cylinder (not shown in一幀平缸（不顯示在 FIG.圖。 1一 ) is located at the right side of forklift ）位于右側的叉車 10 10 and is interconnected between central frame member并且是互相連接中環(huán)至幀成員 15 15 and the front axle assembly.和前橋總成。 In a manner as is known, the frame leveling cylinder is utilized to level chassis在眾所

55、周知的方式，幀平缸是運用水平底盤 12 12 relative to wheels相對于車輪 18 18 and和 20 20 when forklift當叉車 10 10 is parked on uneven terrain and boom assembly停在不平的地形和繁華大會 14 14 is to be raised and extended to place a load carried by fork assembly要提高并擴大到地方議會通過叉進行負載 43 43 onto an elevated surface.表面上高架。 In accordance with a co

56、nventional operation, stabilizing cylinder與老式手術的規(guī)定，穩(wěn)定缸 52 52 is automatically locked in position upon actuation of the frame leveling cylinder to fix the position of rear wheels自動鎖定在平整后的框架的位置固定氣缸驅動的后輪位置 20 20 relative to central frame member相對于中央幀成員 15 15 , and operation of the leveling cylinder, lo

57、cated between the front axle assembly and central frame member ，和運作水準缸之間，前橋總成和位于中央幀成員 15 15 , is operable to move chassis ，是可操作的移動底盤 12 12 to a level position.到水平位置。 Extendible boom forklift伸縮臂叉車 10 10 and fork assembly刀叉大會 43 43 are of conventional construction.是老式的建設。 Representatively, extendible

58、boom forklift代表性，伸縮臂叉 10 10 may be that such as is available from Gehl Company of West Bend, Wisconsin under its designation DYNALIFT?, and fork assembly也許是從格爾，如西彎，威斯康辛公司索取根據其指定DYNALIFT ?和叉大會 43 43 may be a fork attachment as is also available from Gehl Company of West Bend, Wisconsin and adapted fo

59、r use in combination with its DYNALIFT series of extendible boom material handlers.也許是一種叉附件作為，也可以從格爾西彎，在威斯康星州的公司及合并使用其伸縮臂材料解決DYNALIFT一系列調節(jié)。 As shown in所示 FIG.圖。 1一 , the personnel work platform assembly的人員，大會工作平臺 42 42 is adapted for use in combination with extendible boom forklift是改編結合伸縮臂叉用 10 10 .

60、 。 In accordance with known construction, the personnel work platform在與出名建筑的規(guī)定，人事工作平臺 42 42 includes a floor涉及地板 54 54 and a series of vertical railing sections和一系列的垂直扶手部分 56 56 . 。 Personnel work platform人事工作平臺 42 42 further includes a pair of tubular fork receivers還涉及一對管狀叉接受機 58 58 secured to the

61、frame of personnel work platform固定在工作平臺框架的人員 42 42 below floor樓下 54 54 . 。 Each fork receiver每個叉接受機 58 58 defines an internal passage adapted to receive one of the forks定義了一種內部??通道適應收到叉一 59 59 of the fork attachment貨叉附件 43 43 , such that personnel work platform ，這樣，人事工作平臺 42 42 can be carried by the

62、 end of extendible boom可進行由伸縮臂結束 14 14 in order to elevate personnel for various tasks.以提高人員的各項任務。 Personnel work platform人事工作平臺 42 42 is again of conventional construction, and may be that such as is available from Star Industries of Fort Worth, Tex.再次是老式建筑，并也許被諸如可從明星沃斯堡，得克薩斯州工業(yè) Referring now to談到目

63、前 FIG.圖。 2 2 , a personnel work platform (PWP) control system shut-off switch module ，一種人事工作平臺（工務）控制系統關閉互換機模塊 60 60 is adapted for mounting to an upper cross-member是適應用于安裝到上橫梁 63 63 of the fork assembly.貨叉大會。 A cable一種電纜 61 61 extends from the PWP control system shut-off switch module延伸，從工務籌劃控制系統關閉互

64、換機模塊 60 60 and includes a connector涉及連接器 62 62 at its end, which is engageable with a connector of the forklift.在其結束，這是一種連接engageable的叉車。 In this manner, the PWP control system shut-off switch module在這種方式下，工務籌劃控制系統關閉互換機模塊 60 60 is selectively interconnected in the electrical system of the extendible

65、 boom forklift有選擇地在互聯伸縮臂叉車電氣系統 10 10 . 。 A releasable engagement arrangement is interposed between PWP control system shut-off switch module釋放參與工務工程籌劃安排是控制系統之間的中間人關閉互換機模塊 60 60 and cross-member和橫梁 63 63 of the fork assembly.貨叉。 Representatively, the releasable engagement arrangement may be in the fo

66、rm of mating hook-and-loop strips or the like secured to the underside of the module代表性，參與安排的釋放也許會在交配鉤環(huán)帶或類似的形式固定在模塊的底部 60 60 and to the upwardly facing surface of cross-member并在向上面臨橫梁表面 63 63 . 。 Any other type of releasable engagement arrangement may be utilized, such as a snap-type engagement fitting, a slide-on fitting with a detent arrangement, or any other construction which provides removable mounting of PWP control system shut-off switch module參與安排的任何其她類型的釋放可以運用，如單元式接觸件，幻燈片上有制動安排，或任何其她建筑工