Emergency stop device applied to conveying system

Abstract

The utility model discloses an emergency stop device applied to a conveying system, and relates to the technical field of machinery. According to one specific embodiment, the device comprises a conveying device, a supporting assembly, a switch assembly, a connecting assembly and a handheld assembly. The at least one switch assembly is installed on the supporting assembly, and the switch assembly is provided with a switch triggering part and used for controlling starting and stopping of the conveying device; the connecting assembly extends and is connected with the switch triggering part of the switch assembly; and the handheld assembly is arranged on the connecting assembly and can drive the connecting assembly under the action of external force and drive the switch triggering part through the connecting assembly to control start and stop of the conveying device. The implementation mode is striking and visual, and operation of the conveying device can be rapidly stopped through simple operation.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical technical field especially, a kind of emergency stop device applied to conveying system. BACKGROUND

[0002] At present, conveying belt generally adopts mushroom head type point type emergency stop button, is installed below conveying belt, strong secrecy, not easy to find, possibly be blocked by the article on conveying belt, staff needs to be moved to the button before triggering in emergency, close conveying belt path and time is too long, bring security risk. INVENTION CONTENTS

[0003] Therefore, the utility model embodiment provides a structure which is eye-catching and intuitive and can quickly stop the operation of the conveying device through simple operation.

[0004] To achieve the above object, the utility model provides an emergency stop device applied to conveying system.

[0005] The emergency stop device applied to conveying system of the utility model embodiment comprises: conveying device, support assembly, switch assembly, connecting assembly, handheld assembly;At least one switch assembly is installed on the support assembly, and the switch assembly has a switch trigger part for controlling the start and stop of the conveying device;The connecting assembly extends and connects the switch trigger part of the switch assembly;At least one handheld assembly is arranged on the connecting assembly, which can drive the connecting assembly under the action of external force, and drive the switch trigger part through the connecting assembly to control the start and stop of the conveying device.

[0006] Optionally, the support assembly comprises: a U-shaped frame fixed to one side of the conveying device, the U-shaped frame comprising two parallel upright beams and a cross beam connecting the two upright beams;The switch assembly is installed on the upright beam of the U-shaped frame respectively.

[0007] Optionally, the support assembly further comprises: a guide fixed at the connection between the cross beam and the upright beam;The connecting assembly comprises: a first rope structure;And the first rope structure connects the switch trigger part and extends along the cross beam direction through the nearest guide of the switch trigger part.

[0008] Optionally, the support assembly further comprises: at least one bearing fixed to the cross beam, and the part of the first rope structure extending on the cross beam is carried by the bearing.

[0009] Optionally, the handheld assembly comprises: a positioning member connected to the part of the first rope structure extending on the cross beam;A handle;A coupling member with an extension direction perpendicular to the cross beam, respectively connected to the positioning member and the handle.

[0010] Optionally, the handheld assembly further comprises a clamping device with a reset function, the clamping device comprising a sliding member connected between the connecting member and the handle, an elastic member for providing a reset force of the sliding assembly, and a limiting assembly for limiting the sliding range of the sliding member, wherein the sliding member is slidable along the limiting assembly under an external force.

[0011] Optionally, the sliding member is a sliding column, the elastic member is a compression spring, and the limiting assembly is a sleeve and a limiting head, the sliding column being slidable along the inner wall of the sleeve under an external force, the cylindrical surface of the sliding column being provided with a groove perpendicular to the cylindrical surface, one end of the compression spring being connected to the inner side of the groove, and the other end of the compression spring being connected to the limiting head.

[0012] Optionally, the limiting head connected to the compression spring in a natural state protrudes from the groove, limiting the sliding of the sliding column along the inner wall of the sleeve.

[0013] Optionally, the emergency stop device further comprises a hanging plate for fixing the sleeve to the U-shaped frame.

[0014] Optionally, the handheld assembly is a plurality of assemblies, which are arranged at equal intervals on the cross beam.

[0015] According to the technical scheme of the utility model, one embodiment of the utility model has the following advantages or beneficial effects:

[0016] The emergency stop device applied to the conveying system comprises a conveying device, a supporting assembly, a switch assembly, a connecting assembly, and a handheld assembly, at least one switch assembly is installed on the supporting assembly, the switch assembly has a switch trigger part for controlling the start and stop of the conveying device, the connecting assembly extends and connects the switch trigger part of the switch assembly, and at least one handheld assembly is arranged on the connecting assembly and can drive the connecting assembly under an external force and drive the switch trigger part through the connecting assembly to control the start and stop of the conveying device. In this way, the operator can operate the handheld assembly arranged at a conspicuous position of the conveying belt to quickly stop the operation of the conveying device, forming an eye-catching and intuitive emergency stop structure of the conveying device, which is simple to operate, overcomes the defects of the existing emergency stop mode of the conveying belt, such as difficulty in finding, long emergency stop path, and long time consumption, and avoids safety hazards caused by untimely emergency stop.

[0017] The further effects of the above-mentioned non-conventional optional mode will be described in the following combined with the specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings are used to better understand the utility model and do not constitute undue limitations on the utility model. Among them:

[0019] Figure 1 is the overall structure schematic diagram of the emergency stop device in the embodiment of the utility model;

[0020] Figure 2is a support assembly structure schematic view of the embodiment of the utility model;

[0021] Figure 3 is a structure schematic view of the connecting assembly and handheld assembly of the embodiment of the utility model;

[0022] Figure 4 is a switch assembly structure schematic view of the embodiment of the utility model;

[0023] Figure 5 is a structure schematic view of the sliding piece, compression spring and limit head of the embodiment of the utility model.

[0024] Mark explanation:

[0025] 100, conveying device;200, support assembly;210, positioning plate;220, U-shaped frame;230, guide piece;240, bearing piece;300, switch assembly;310, U-shaped plate;320, switch trigger part;330, threaded groove;400, connecting assembly;410, first rope structure;420, threaded column;500, handheld assembly;510, positioning piece;520, coupling piece;530, sliding piece;540, handle;550, recess;560, elastic piece;570, limit head;610, hanging plate;620, sleeve. Specific implementation

[0026] The exemplary embodiments of the utility model are described below in conjunction with the drawings, including various details of the embodiment of the utility model to help understanding, which should be considered as only exemplary. Therefore, those skilled in the art should realize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the utility model. Similarly, in order to be clear and concise, the description of well-known functions and structures is omitted in the following description.

[0027] It should be pointed out that "setting", "installing", "connecting" in the following description can represent fixed cooperation between two things, or non-fixed cooperation (such as sliding connection);It can represent detachable cooperation (such as bolt and nut connection), or it can represent non-detachable cooperation (such as welding);It can represent direct cooperation, or it can represent indirect cooperation with the third thing as the medium.

[0028] In the description of the utility model, unless another definite limit, first target is "on" or "under" second target can include that first target and second target are in direct contact, also can include that first target and second target are not in direct contact but contact through another target between them. First target is "on", "above" and "on" second target includes that first target is directly above and obliquely above second target, or only indicates that the height of first target is greater than second target. First target is "under", "below" and "under" second target includes that first target is directly below and obliquely below second target, or only indicates that the height of first target is less than second target. The orientation or position relation of terms "on", "under", "left", "right" and the like can be based on the orientation or position shown in the drawing, also can be based on the defined specific direction and position, these terms are for the convenience of description, and do not indicate or imply that the device or element referred to must have a particular orientation or must be constructed and operated in a particular orientation, therefore can not be understood as the limitation of the utility model. In addition, the terms "first", "second" are only used to distinguish in description, and do not have special meaning. In the case of no conflict, the embodiment of the utility model and the technical features in the embodiment can be combined with each other.

[0029] Figure 1 It is the schematic diagram of the emergency stop device in the embodiment of the utility model, Figure 2 It is the support assembly structure schematic diagram of the embodiment of the utility model, Figure 3 It is the structure schematic diagram of the connecting assembly and handheld assembly of the embodiment of the utility model, Figure 4 It is the switch assembly structure schematic diagram of the embodiment of the utility model, Figure 5 It is the structure schematic diagram of the sliding piece, compression spring and limit head of the embodiment of the utility model, see Figures 1 to 5 .

[0030] The emergency stop device applied to the conveying system of the embodiment of the utility model includes: conveying device 100, support assembly 200, switch assembly 300, connecting assembly 400, handheld assembly 500;At least one switch assembly 300 is installed on support assembly 200, and switch assembly 300 has switch trigger part 320, which is used to control the start-stop of conveying device 100;Connecting assembly 400 extends and connects the switch trigger part 320 of switch assembly 300;At least one handheld assembly 500 is arranged on connecting assembly 400, which can drive connecting assembly 400 under external force and drive switch trigger part 320 through connecting assembly 400 to control the start-stop of conveying device 100. The above conveying device 100 can be a conveyor belt.

[0031] In the embodiment of the utility model, the support assembly 200 comprises: a U-shaped frame 220 fixed on one side of the conveying device 100, the U-shaped frame comprising two parallel vertical beams and a cross beam connecting the two vertical beams; and the switch assembly 300 is respectively installed on the vertical beams of the U-shaped frame 220.

[0032] In one embodiment, the support assembly 200 further comprises: a guide 230 fixed at the connection between the cross beam and the vertical beam; the guide 230 can be a pulley. The connecting assembly 400 comprises: a first rope structure 410; and the first rope structure 410 is connected to the switch trigger part 320 and extends along the direction of the cross beam through the nearest guide 230 of the switch trigger part 320.

[0033] In one optional technical solution, the support assembly 200 further comprises: at least one bearing 240 fixed on the cross beam, and the part of the first rope structure 410 extending on the cross beam is borne by the bearing 240. The bearing 240 can be a support plate.

[0034] In one optional implementation, the handheld assembly 500 comprises: a positioning member 510 connected to the part of the first rope structure 410 extending on the cross beam; a handle 540; and a coupling member 520 extending in a direction perpendicular to the cross beam and respectively connected to the positioning member 510 and the handle 540. The positioning member 510 can be a positioning sleeve.

[0035] Optionally, the handheld assembly 500 further comprises: a clamping device with a reset function, the clamping device comprising: a sliding member 530 connected between the coupling member 520 and the handle 540; a resilient member 560 for providing a reset force of the sliding assembly; and a limiting assembly for limiting the sliding range of the sliding member 530; wherein the sliding member 530 can slide along the limiting assembly under the action of an external force. The sliding member 530 can be a sliding column, and the coupling member 520 can be a rope structure.

[0036] Preferably, the sliding member 530 is a sliding column; the resilient member 560 is a compression spring; the limiting assembly is a sleeve 620 and a limiting head 570; the sliding column can slide along the inner wall of the sleeve 620 under the action of an external force; the column surface of the sliding column is provided with a groove 550 perpendicular to the column surface, one end of the compression spring is connected to the inner side of the groove 550, and the other end of the compression spring is connected to the limiting head 570.

[0037] In one optional embodiment, the limiting head 570 connected to the compression spring protrudes from the groove 550 in a natural state, thereby limiting the sliding of the sliding column along the inner wall of the sleeve 620.

[0038] As a preferred solution, the emergency stop device further comprises: a hanging plate 610 for fixing the sleeve 620 to the U-shaped frame 220.

[0039] Preferably, the hand-held assembly 500 is multiple, and is arranged at equal intervals on the cross beam.

[0040] The following describes a specific embodiment of the present application.

[0041] The emergency stop device of the embodiment of the present application is used for quickly stopping the operation of the conveying device 100. The conveying device 100 has a support assembly 200 as an outer frame, and the support assembly 200 includes multiple vertical beams and at least one cross beam. In the embodiment of the present application, the support assembly 200 can be composed of two vertical beams in a vertical direction (which can be a direction perpendicular to the conveying device or an approximate direction, and the above approximation can be quantified by setting an included angle threshold) and any suitable number of multiple cross beams in a horizontal direction (which can be a direction parallel to the conveying device or an approximate direction, and the above approximation can be quantified by setting an included angle threshold).

[0042] Exemplarily, referring to Figure 1 and 2 , a more preferred structure of the support assembly 200 is that the support assembly 200 includes a U-shaped frame 220 fixed on the same side of the conveying device 100 (either on the left side of the conveying device or on the right side of the conveying device), and the U-shaped frame 220 includes two parallel vertical beams and a cross beam connecting the two vertical beams. The above vertical beams can be fixed on the conveying device structure by plate-shaped or groove-shaped positioning plates 210, and the cross beam can be fixed between the two vertical beams. Optionally, the support assembly 200 can further include two guide members 230 fixed at the connection between the cross beam and the vertical beam and at least one bearing member 240 fixed on the cross beam, and the guide members 230 and the bearing member 240 are used to arrange the rope assembly to be described later. The above structure can ensure the stability of each component carried by the U-shaped frame 220 when the U-shaped frame 220 is under stress.

[0043] The emergency stop device of the embodiment includes two switch assemblies 300, one connecting assembly 400, and at least one hand-held assembly 500. Among them, the switch assembly 300 is used as the start-stop controller of the conveying device 100, and is used to switch the conveying device 100 from the start state to the stop state or from the stop state to the start state under the action of external force. The two switch assemblies 300 are respectively installed at both ends of the support assembly 200, for example, the two switch assemblies 300 are respectively installed on the two vertical beams of the U-shaped frame 220. It should be noted that the two switch assemblies 300 can be installed at any suitable position of the support assembly 200, and are not limited to the vertical beams. Referring to Figure 4The switch assembly 300 has a switch trigger 320, which is a component of the switch assembly 300 for receiving external force to realize start-stop control. In one embodiment, the switch trigger 320 can have a threaded structure to realize fixation with the rope assembly, and the threaded structure can be an internal thread or an external thread. Exemplarily, the switch trigger is a receiving sleeve structure having a threaded groove 330. The switch assembly 300 can also have a structure for fixing it to the support assembly 200, for example Figure 4 The U-shaped plate 310 shown can be used to fix the switch assembly 300 to the outer side of the U-shaped frame 220 through bolts. It can be understood that other suitable structures can be used to fix the switch assembly 300.

[0044] Referring to Figure 1 and Figure 3 The connecting assembly 400 is designed to extend between two switch assemblies 300 and connect the switch triggers 320 of the two switch assemblies 300. In one example, the connecting assembly 400 can include a first rope structure 410 and a structure for connecting the first rope structure 410 and the switch trigger 320, for example Figure 3 The threaded column 420 shown can cooperate with the threaded groove 330 of the switch trigger 320 to realize connection of the connecting assembly 400 and the switch trigger 320. The above first rope structure 410 can be a rope with required physical properties, and the material can be metal. Exemplarily, a steel wire rope can be used as the first rope structure 410. Through the arrangement of the switch trigger 320 and the threaded groove 330 thereof, the first rope structure 410 can be connected to realize that the first rope structure 410 drives the switch assembly 300 to close the conveying device 100 when force is applied. In addition, the first rope structure 410 will not be affected when the switch assembly 300 is disassembled. In actual application, the connecting assembly 400 can also adopt a rigid structure or other structures, for example, a plurality of transmission rods connected to each other, as long as the structure can transmit the force of the handheld assembly 500 to be described later to the switch trigger 320 to make the conveying device 100 stop quickly.

[0045] At least one handheld assembly 500 is arranged at the connecting assembly 400, each handheld assembly 500 can drive the connecting assembly 400 under the action of external force, and then drive the switch triggering part 320 by the connecting assembly 400, so as to quickly switch the conveying device 100 from the current opening state to the stop state. Exemplarily, a plurality of handheld assemblies 500 can be arranged, and the plurality of handheld assemblies 500 are arranged at the part of the first rope structure 410 between the two guide members 230 at equal intervals, and can be flexibly arranged according to actual needs. Since the mounting position of the handheld assembly 500 is eye-catching, easy to find and easy to operate, and a reasonable number can be arranged according to needs, the operator can quickly stop the conveying device 100 from running by selecting a nearby handheld assembly 500 to apply force, and the required moving path and time consumption are obviously reduced, thereby reducing or preventing the safety risk caused by the non-timely emergency stop of the conveying device 100.

[0046] It should be noted that the mounting position, material used and emergency stop force applying mode of the above switch assembly 300, the connecting assembly 400 and the handheld assembly 500 can be flexibly designed according to actual needs, and are not limited to one of them. For example, the connecting assembly 400 can be mounted above (such as a cross beam) or below (or below a vertical beam) the support assembly 200, and the components (such as the rope assembly) in the connecting assembly 400 can change the extension direction through the guide member 230 or can remain straight extension. The switch assembly 300 can be mounted at any suitable position of the support assembly 200. The handheld assembly 500 can adopt the action mode of a pull rope, or can adopt the action mode of a push rod, a pull rod or the like, and the upward force or downward force can be used based on the handheld assembly 500 triggering the emergency stop. Hereinafter, only the case that the connecting assembly 400 is mounted above the support assembly 200, the switch assembly 300 is mounted below the vertical beam, the handheld assembly 500 has a rope assembly, and the downward pulling force mode is used to trigger the emergency stop is taken as an example for description.

[0047] In the embodiment of the utility model, the first rope structure 410 is connected with the switch assembly 300 at both ends and extends along the vertical beam, and the part between the contact positions of the two guide members 230 extends along the cross beam. That is, the part of the first rope structure 410 between any switch triggering part 320 and the guide member 230 closest to the switch triggering part 320 extends in the direction of the vertical beam, and the part between the two guide members 230 extends in the direction of the cross beam. Preferably, the part of the first rope structure 410 between the two guide members 230 can be carried by at least one carrier 240 on the cross beam, for example, the first rope structure 410 passes through the holes on each carrier 240. In this way, the friction of the first rope structure 410 can be reduced by the arrangement of the guide member 230, and the turning of the first rope structure 410 during movement is facilitated; the first rope structure 410 is oriented by the arrangement of the carrier 240, so as to avoid that the inclination range of the first rope structure 410 is too large when being stressed.

[0048] In one embodiment, any of the hand-held assembly 500 comprises a positioning member 510, a handle 540 and a coupling member 520. The positioning member 510 is sleeved on the portion of the first rope structure 410 between the two guides 230, and the coupling member 520 is connected to the positioning member 510 and the handle 540 respectively and extends perpendicularly to the crossbeam. In practical applications, a rope with required physical properties can be used as the coupling member 520. It can be understood that other structures can also be used to form the hand-held assembly 500, such as a pull rod and a handle structure.

[0049] Referring to Figure 3 and Figure 5 , in order to prevent the conveying device 100 from frequently switching between the open and stop states due to unstable force on the hand-held assembly 500, the position of the hand-held assembly 500 can be limited by the following structure. As an optional structure, the emergency stop device further comprises a sleeve 620 fixed on the U-shaped frame, and any of the hand-held assembly 500 further comprises a resilient member 560, a limiting head 570 and a sliding member 530 connected between the coupling member 520 and the handle 540.

[0050] Exemplarily, the emergency stop device can comprise a hanging plate 610 for fixing the sleeve 620 on the U-shaped frame 220. The hanging plate 610 can comprise a vertical plate directly connected to the U-shaped frame 220 and a base fixed on the vertical plate, and the base has the sleeve 620 thereon. It can be understood that the sleeve 620 can be fixed on the U-shaped frame 220 by any other fixing manner. Preferably, the sliding member 530 can slide along the inner wall of the sleeve 620 under the action of external force. The cylindrical surface of the sliding member 530 is provided with a groove 550 perpendicular to the cylindrical surface, one end of the resilient member 560 is connected to the inner side of the groove 550, and the other end of the resilient member 560 is connected to the limiting head 570. The limiting head 570 can have a continuous smooth surface or a streamlined surface, so that part or all of the limiting head 570 is constrained in the groove 550 by the sleeve 620 when the sliding member 530 passes through the sleeve 620 under the action of external force.

[0051] In one embodiment, when the conveying device 100 is in the open state, the limiting column 530 is above the sleeve 620, the resilient member 560 is in a natural state, the limiting head 570 protrudes from the groove 550, and the sliding member 530 is limited to enter the sleeve 620 downward, thereby preventing the conveying device 100 from stopping when it is not needed. When the handle 540 is subjected to a downward pulling force, the limiting head 570 enters the groove 550 under the action of the pulling force, the sliding member 530 slides downward along the inner wall of the sleeve 620 until the limiting head 570 passes through the sleeve 620, at which time the resilient member 560 pops out the limiting head 570, and the limiting head 570 limits the sliding member 530 to enter the sleeve 620 upward, thereby preventing the conveying device 100 from being opened by itself due to shaking and other factors.

[0052] In the embodiment of the utility model, one emergency stop device of the embodiment of the utility model can be arranged on the left side and the right side of the conveying device 100 respectively for facilitating operation, and of course, any applicable number of structures can also be arranged.

[0053] According to the above embodiment, the execution mode of the emergency stop device is that when the conveying device 100 needs to be paused, a downward pulling force is applied to the handle 540, the handle 540 drives the sliding piece 530 to descend, the limiting head 570 enters the recess 550 under the extrusion of the sleeve 620, and the elastic piece 560 is extruded, the sliding piece 530 moves downward, when the limiting head 570 moves below the sleeve 620, the elastic piece 560 pops out the limiting head 570 to limit the position of the sliding piece 530. When the sliding piece 530 descends, the coupling piece 520 drives the first rope structure 410 to pull the switch trigger part 320, and the conveying device 100 is controlled to stop.

[0054] When the conveying device 100 needs to be started, an upward pushing force is applied to the handle 540, the limiting head 570 enters the recess 550 under the extrusion of the sleeve 620, the sliding piece 530 slides upward, when the limiting head 570 moves above the sleeve 620, the elastic piece 560 pops out the limiting head 570 to form a limit, the first rope structure 410 and the coupling piece 520 are relaxed after the external force disappears, the switch trigger part 320 is pushed by the preset elastic structure (not shown in the figure) or the elastic of the first rope structure 410, and the conveying device 100 is controlled to start. The above elastic structure can be arranged on the switch trigger part 320 or other components of the switch assembly 300, and is used to automatically push the switch trigger part 320 when the force on the first rope structure 410 disappears, so that the conveying device 100 starts. In the case of using the above elastic structure, when the conveying device 100 is in a stopped state, the limiting effect of the limiting head 570 below the sleeve 620 can make the first rope structure 410 and the coupling piece 520 maintain a certain pulling force, thereby preventing the above elastic structure from automatically triggering the conveying device 100 to start.

[0055] Those skilled in the art should know that the above embodiments described in the specification all belong to preferred embodiments, and the components involved are not necessarily necessary for realizing the utility model.

[0056] According to the technical scheme of the embodiment of the utility model, the worker can pull the handheld assembly in front of the conveying device to quickly stop the operation of the conveying device, thereby forming an eye-catching, intuitive and simple-to-operate conveying device emergency stop mode, reducing the moving path and time required for stopping the conveying device, and preventing safety risks caused by untimely stopping of the conveying device.

[0057] The specific embodiments described above do not constitute a limitation of the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can occur depending on design requirements and other factors. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An emergency stop device for application to a conveyor system, comprising: The device comprises a support assembly (200), a switch assembly (300), a connecting assembly (400), and a hand-held assembly (500). The switch assembly (300) is installed on the support assembly (200) and has a switch trigger (320) for controlling the start and stop of the conveying device (100). The connecting assembly (400) extends and connects the switch trigger (320) of the switch assembly (300). The hand-held assembly (500) is arranged on the connecting assembly (400) and can drive the connecting assembly (400) under external force and drive the switch trigger (320) through the connecting assembly (400) to control the start and stop of the conveying device (100).

2. The emergency stop device according to claim 1, characterized in that The support assembly (200) comprises a U-shaped frame (220) fixed on one side of the conveying device (100), which comprises two parallel vertical beams and a cross beam connecting the two vertical beams. The switch assembly (300) is installed on the vertical beams of the U-shaped frame (220).

3. The emergency stop device according to claim 2, characterized in that The support assembly (200) further comprises a guide (230) fixed at the connection between the cross beam and the vertical beam. The connecting assembly (400) comprises a first rope structure (410).

4. The emergency stop device according to claim 3, characterized in that The first rope structure (410) connects the switch trigger (320) and extends along the cross beam through the nearest guide (230). The support assembly (200) further comprises at least one bearing (240) fixed on the cross beam.

5. The emergency stop device of claim 3, wherein The part of the first rope structure (410) extending on the cross beam is carried by the bearing (240). The hand-held assembly (500) comprises: A positioning member (510) connected to the part of the first rope structure (410) extending on the cross beam; A handle (540); 6. The emergency stop device according to claim 5, characterized in that A coupling member (520) extending perpendicularly to the cross beam and connecting the positioning member (510) and the handle (540). The hand-held assembly (500) further comprises a clamping device with a reset function, which comprises: A sliding member (530) connected between the coupling member (520) and the handle (540); A resilient member (560) for providing a reset force of the sliding assembly; A limiting assembly for limiting the sliding range of the sliding member (530); The sliding member (530) can slide along the limiting assembly under external force.

7. The emergency stop device according to claim 6, wherein: The sliding member (530) is a sliding column; The resilient member (560) is a compression spring; The limiting assembly is a sleeve (620) and a limiting head (570); The sliding column can slide along the inner wall of the sleeve (620) under external force; The sliding column has a groove (550) perpendicular to the column surface on the column surface, one end of the groove (550) is connected to the compression spring, and the other end of the compression spring is connected to the limiting head (570).

8. The emergency stop device according to claim 7, characterized in that The limit head (570) of the compression spring connection protrudes from the groove (550) in the natural state, limiting the sliding of the sliding column on the inner wall of the sleeve (620).

9. The emergency stop device of claim 7, wherein The emergency stop device further comprises a hanging plate (610) for fixing the sleeve (620) to the U-shaped frame (220).

10. The emergency stop device of claim 5, wherein The handheld assemblies (500) are multiple and arranged at equal intervals on the cross beam.

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