Auxiliary reset anti-misoperation device for pull switch

Abstract

The invention belongs to the technical field of pull switches, and particularly relates to a pull switch auxiliary reset misoperation prevention device which comprises a body and a control device arranged on the body, the body is fixedly arranged on a base, and the control device is electrically connected with a transmission rod and a transportation device; the input end of the control device is electrically connected with the transmission rod, and the output end of the control device is electrically connected with the transportation device; the transmission rod is rotatably arranged on the body through an axis, and a signal that the transmission rod rotates along the axis is transmitted to the control device, so that the control device drives the transportation device to start and stop; at least one side of the transmission rod away from the axis is fixedly connected with a reset device; one end of the reset device is connected with the transmission rod, and the other end is connected with the base; through the reset device arranged outside the body, the situation that an existing pull switch vibrates in the working process of equipment, and consequently the pull switch is operated by mistake is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of pull-wire switches, and in particular relates to a pull-wire switch auxiliary resetting and malfunction prevention device. Background Art

[0002] As a key safety protection device, the pull-wire switch is widely used in various transportation systems, especially in belt conveyors. Its main function is to send a stop signal in time by pulling the rope to protect the safety of equipment and personnel. When the transportation equipment fails or an emergency occurs, the pull-wire switch can respond quickly and stop the equipment to prevent accidents. In a complex industrial environment, the number of pull-wire switches may reach dozens to ensure the safe and stable operation of the entire conveying system.

[0003] In order to improve the practicality and safety of the pull-cord switch, the existing technology has continuously improved the traditional pull-cord switch. Among them, in order to solve the problem that the pull-cord switch cannot automatically reset after a fault, many solutions have adopted the method of adding a reset device to the transmission rod to promote the pull-cord switch to return to a normal state. However, this improvement does not fundamentally solve the actual efficiency problem of automatic reset.

[0004] First, the return spring tension of the transmission rod is often insufficient to overcome the weight and length of the cable. This is especially true in long-distance belt conveyors, where the weight of the long cable may prevent the switch from resetting effectively. In addition, equipment vibration and other environmental factors can also cause the cable switch to malfunction, affecting the normal operation of the transport equipment.

[0005] Based on this, there is an urgent need for a pull-cord switch auxiliary reset and malfunction prevention device that can take into account factors such as the pull-cord setting and equipment vibration in actual use to ensure efficient and reliable operation of the pull-cord switch. Summary of the invention

[0006] The purpose of the present invention is to provide a pull-wire switch auxiliary reset anti-malfunction device to address the deficiencies of the prior art, so as to prevent the pull-wire device from malfunctioning due to equipment vibration.

[0007] In order to achieve the above-mentioned invention objectives, this application implements the following technical solutions:

[0008] A pull-wire switch auxiliary reset and malfunction prevention device comprises a main body and a control device arranged on the main body, the main body is fixedly arranged on a base, and the control device is electrically connected to a transmission rod and a transport device;

[0009] A control device, the input end of which is electrically connected to the transmission rod, and the output end of which is electrically connected to the transport device, for driving the transport device to start and stop;

[0010] The transmission rod is rotatably arranged on the body through the axis, and the control device drives the start and stop of the transport device by transmitting the signal of the transmission rod rotating along the axis to the control device;

[0011] A reset device is fixedly connected to at least one side of the transmission rod away from the axis;

[0012] One end of the reset device is connected to the transmission rod, and the other end is connected to the base.

[0013] The above technical solution produces the following technical effects:

[0014] The present application fixes the two ends of the reset device on the transmission rod and the base instead of choosing the technical solution of assembling the reset device on the transmission rod in the prior art, so that the reset device can provide a reset force more stably when subjected to external force, thereby effectively avoiding malfunctions caused by equipment vibration or other external factors.

[0015] Specifically, the design of the reset device takes into account various working conditions of the pull-cord switch in actual use, such as the weight and length of the pull-cord and the operating environment of the equipment. By optimizing the structure and materials of the reset device, this application ensures that the pull-cord switch can be quickly and reliably reset in the event of a fault or emergency, thus ensuring the normal operation of the transportation equipment.

[0016] As a further improvement to the pull-wire switch auxiliary reset and malfunction prevention device of the present invention, the control device includes a first state and a second state;

[0017] When the control device enters the first state, the transport device is in a stationary state; when the control device enters the second state, the transport device is in a transport state;

[0018] When the transmission rod rotates clockwise along the axis by more than an angle a, the control device enters the first state;

[0019] When the transmission rod rotates clockwise along the axis by an angle of 0-a, the control device enters the second state.

[0020] As a further improvement of the pull-wire switch auxiliary reset and malfunction prevention device of the present invention, at least one base is provided, and the base is provided with a fixing portion, an extending portion and a connecting portion connected to the reset device;

[0021] A fixing part, used for fixing the body on the platform;

[0022] Extension part, vertical connection and fixing part and connection part;

[0023] The connecting part is fixed to the main body.

[0024] As a further improvement to the pull-wire switch auxiliary reset and misoperation prevention device of the present invention, transmission rings are respectively provided on both sides of the transmission rod away from the axis, and at least one transmission ring is fixedly connected to the reset device.

[0025] As a further improvement to the pull-wire switch auxiliary reset and misoperation prevention device of the present invention, at least one pull wire is fixedly provided on the side of the transmission ring away from the reset device, and the pull wire is directed away from the reset device.

[0026] As a further improvement to the pull-wire switch auxiliary reset and malfunction prevention device of the present invention, one end of the reset device is fixedly connected to the transmission ring, and the other end of the reset device is fixedly connected to the fixing part via a screw.

[0027] As a further improvement to the pull-wire switch auxiliary reset and malfunction prevention device of the present invention, the reset device includes an elastic member and a bending member connected to the elastic member;

[0028] The elastic member is connected to the extension buckle of the transmission ring through the first buckle;

[0029] The bending piece is fixedly connected to the fixing part via a screw rod.

[0030] As a further improvement to the pull-wire switch auxiliary resetting and misoperation prevention device of the present invention, the elastic member is a spring member, and the bending member is made of metal.

[0031] As a further improvement of the pull-wire switch auxiliary reset and anti-maloperation device of the present invention, the pull-wire switch auxiliary reset and anti-maloperation device is symmetrically arranged along both sides of the transportation device, and at least one group of pull-wire switch auxiliary reset and anti-maloperation device is symmetrically designed on both sides of the transportation device.

[0032] As a further improvement to the pull-wire switch auxiliary reset and malfunction prevention device of the present invention, it is characterized in that the pull-wire switch auxiliary reset and malfunction prevention devices on one side of the transportation device are all connected by the same pull wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0034] Figure 1 This is a schematic diagram of the structure of Example 1 of the present invention;

[0035] Figure 2 This is a working schematic diagram of the control device of Example 1 of the present invention;

[0036] Figure 3 for Figure 1 A local enlarged view at point A;

[0037] in:

[0038] 1-Ontology;

[0039] 2- Control device;

[0040] 3- Base;

[0041] 31-fixed part;

[0042] 311 - screw;

[0043] 32- extension;

[0044] 33-connecting part;

[0045] 4- Transmission rod;

[0046] 41-axis;

[0047] 42-transmission ring;

[0048] 421-Extension buckle;

[0049] 43-pull wire;

[0050] 5-Transportation device;

[0051] 6-Reset device;

[0052] 61-spring member;

[0053] 62-bending piece;

[0054] 611-first buckle;

[0055] 7-Platform. DETAILED DESCRIPTION

[0056] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present application. The terms used herein in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0057] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] Although the present application is disclosed as above with preferred embodiments, it is not intended to limit the claims. Any technical personnel in this field may make several possible changes and modifications without departing from the concept of the present application. Therefore, the scope of protection of the present application shall be based on the scope defined by the claims of the present application.

[0059] The present invention is further described in detail below in conjunction with specific implementation methods, but the embodiments of the present invention are not limited thereto.

[0060] Example 1

[0061] like Figure 1-2 As shown, in order to solve the problem that the reset of the pull wire 43 device in the prior art cannot overcome the inevitable vibration of the equipment (transport device 5) during operation, which affects the reset effect of the reset device 6. Based on this, the present application designs a pull wire switch auxiliary reset and malfunction prevention device, comprising a body 1 and a control device 2 arranged on the body 1, the body 1 is fixedly arranged on the base 3, and the control device 2 is electrically connected to the transmission rod 4 and the transport device 5;

[0062] The input end of the control device 2 is electrically connected to the transmission rod 4, and the output end of the control device 2 is electrically connected to the transport device 5, so as to drive the start and stop of the transport device 5. In the specific implementation process, the control device 2 may be a PLC controller; and the transmission rod 4 is rotatably arranged on the body 1 through the axis 41, and the control device 2 drives the start and stop of the transport device 5 by transmitting the signal of the transmission rod 4 rotating along the axis 41 to the control device 2;

[0063] Specifically, the transmission rod 4 will rotate along the axis 41 under the action of external force. During the rotation process, the transmission rod 4 can transmit signals to the PLC controller. The mechanism of the signal transmitted by the transmission rod 4 is that the transmission rod 4 has a built-in sensing element, which can keenly capture the slight angle change of the transmission rod 4 rotating along the axis 41 and convert this change into an electrical signal. When the transmission rod 4 rotates clockwise along the axis 41, the sensing element will respond immediately and output electrical signals of different intensities to the PLC controller according to the rotation angle. After receiving these electrical signals, the PLC controller will perform a rapid logical judgment to determine the current state of the transport device 5.

[0064] Furthermore, at least one side of the transmission rod 4 away from the axis 41 is fixedly connected with a reset device 6; one end of the reset device 6 is connected to the transmission rod 4, and the other end is connected to the base 3. The reset device 6 of the present application is not connected to the transmission rod 4 (the meaning is not that the present application is not connected to the transmission rod 4, but the entire reset device 6 is not set on the transmission rod 4), but only one end is connected to the transmission rod 4 to place the reset device 6 on the side away from the body 1.

[0065] Specifically, the design principle and reset mechanism of the reset device 6 of the present application are: the reset device 6 works in conjunction with the PLC controller to achieve stable control of the equipment (transport device 5). The reset device 6 uses the automatic reset feature to ensure that the transmission rod 4 can quickly return to its initial position after the external force acts, thereby enhancing the stability of the equipment. At the same time, it guides the transmission rod 4 to move in a predetermined direction to prevent deviation or jamming, thereby ensuring a smooth reset process. In addition, the limit device limits the rotation angle of the transmission rod 4 to prevent damage, and sends a feedback signal to the PLC controller when the reset is completed. The PLC controller adjusts the working state of the transport device 5 according to this signal to achieve precise control.

[0066] Furthermore, the control device 2 includes a first state and a second state; when the control device 2 enters the first state, the transportation device 5 is in a stagnant state; when the control device 2 enters the second state, the transportation device 5 is in a transportation state; when the transmission rod 4 rotates clockwise along the axis 41 by an angle greater than a, the control device 2 enters the first state; when the transmission rod 4 rotates clockwise along the axis 41 by an angle of 0-a, the control device 2 enters the second state.

[0067] In the specific implementation process, when the transmission rod 4 rotates clockwise along the axis 41 by an angle greater than a, the strength of the electrical signal output by the sensing element of the transmission rod 4 will reach a preset threshold value. After the PLC controller recognizes this signal, it will immediately enter the first state, and quickly stop the transport device 5 by cutting off the power supply or sending a stop command, thereby effectively preventing malfunctions caused by excessive rotation. When the transmission rod 4 rotates clockwise along the axis 41 by an angle within the range of 0-a, the strength of the electrical signal output by the sensing element is not enough to trigger the first state condition of the PLC controller. At this time, the PLC controller remains in the second state, allowing the transport device 5 to continue to operate normally.

[0068] In summary, the present application effectively solves the problems of poor resetting effect and susceptibility to vibration of the pull wire 43 device in the prior art by improving the resetting device 6. At the same time, the resetting device 6 of the present application has a compact structure and high reliability, and can significantly improve the working efficiency and stability of the transport device 5.

[0069] Example 2

[0070] like Figure 1-3 As shown, what is different from Example 1 is: in order to further reflect the transmission effect of the pull wire 43 switch transmission rod 4 of the pull wire 43 switch auxiliary reset to prevent malfunction device of the present application and the coordination with the reset device 6, specifically, in the pull wire 43 switch auxiliary reset to prevent malfunction device of the present application, there is set at least one base 3, and the base 3 is provided with a fixing part 31, an extension part 32 and a connecting part 33 connected to the reset device 6; wherein at least one of the base 3 is designed in consideration of the contents as shown in Example 1, if the reset devices 6 are provided on both sides of the transmission rod 4, then the best placement position for achieving the reset effect of the reset device 6 is to provide a reset device 6 on each side of the main body 1, and in order to maintain the stability of the reset devices 6 on both sides, the present application will provide two bases 3 on the basis of achieving the technical purpose, for respectively receiving the reset devices 6 on both sides of the main body 1.

[0071] At the same time, even if there is only one reset device 6 in the present application, in order to better achieve the technical purpose of the present application, the present application will still set two or more bases 3 at the bottom of the main body 1. The two or more bases 3 can provide sufficient support for the main body 1 of the present application or the entire device, and further alleviate the vibration generated by the equipment (transport device 5) during operation and transportation.

[0072] Furthermore, the fixing part 31 in the base 3 is used to fix the body 1 on the platform 7. The fixing part 31 of the base 3 is designed as an adjustable fixing part, which is convenient for adapting to the installation requirements of different platforms 7. The fixing part 31 is integrated with threaded holes and fastening bolts. The fastening degree between the base 3 and the platform 7 is adjusted by rotating the bolts to ensure that the body 1 can be stable and not shaken after installation.

[0073] Furthermore, the extension part 32 in the base 3 is vertically connected to the fixing part 31 and the connecting part 33; the connecting part 33 is fixed to the body 1. The extension part 32 can further alleviate the vibration, play a shock-absorbing effect, and enhance the stability of the base 3. The extension part 32 and the fixing part 31 and the connecting part 33 are made of high-strength materials to ensure the stability and durability of the overall structure. In addition, the design of the extension part 32 also takes into account the needs of easy installation and maintenance, ensuring that it can maintain a good working condition during long-term use.

[0074] Other details that are the same as those in Example 1 are not described in detail in this application.

[0075] Example 3

[0076] like Figure 1-3As shown, the difference from Example 1 is that: in order to further improve the working stability of the transmission rod 4 of the present application. Further, the transmission rod 4 is provided with transmission rings 42 on both sides away from the axis 41, and at least one transmission ring 42 is fixedly connected to the reset device 6. Among them, at least one pull wire 43 is fixedly provided on the side of the transmission ring 42 away from the reset device 6, and the pull wire 43 is oriented away from the reset device 6.

[0077] Specifically, the present application takes into account that the setting of a single pull wire 43 may cause uneven force on the transmission rod 4 in some cases, thereby affecting its working stability. Therefore, the present application sets transmission rings 42 on both sides of the transmission rod 4 away from the axis 41, and connects the transmission rings 42 through at least one pull wire 43, which can effectively disperse the pulling force of the pull wire 43 on the transmission rod 4, so that the transmission rod 4 is more balanced when subjected to force. At the same time, at least one transmission ring 42 is fixedly connected to the reset device 6, so that the reset device 6 can more stably guide the transmission rod 4 to move in a predetermined direction during the reset process, prevent deviation or jamming, and further improve the working stability of the transmission rod 4.

[0078] Specifically, in the specific connection method between the transmission ring 42 and the pull wire 43, one end of the pull wire 43 can be fixed at a specific position of the transmission ring 42 to ensure that the pull wire 43 can be evenly transmitted to the transmission ring 42 when subjected to force. In addition, the material and diameter of the pull wire 43 also need to be selected according to actual needs to ensure that it can withstand sufficient tension and has good wear resistance. Furthermore, in order to prevent the pull wire 43 from being worn or broken during long-term use, a protective cover can be set on the outside of the pull wire 43 or other protective measures can be taken.

[0079] Furthermore, one end of the reset device 6 is fixedly connected to the transmission ring 42, and the other end of the reset device 6 is fixedly connected to the fixing portion 31 via a screw 311. The reset device 6 includes an elastic member and a bending member 62 connected to the elastic member; the elastic member is connected to the extension buckle 421 of the transmission ring 42 via a first buckle 611;

[0080] The bending member 62 is fixedly connected to the fixing portion 31 by means of the screw rod 311. The design of the first bayonet 611 and the extension buckle 421 enables the reset device 6 to be firmly fixed on the transmission ring 42, ensuring that the transmission rod 4 can be stably guided to move during the reset process. At the same time, the structural design of the first buckle 611 and the extension buckle 421 takes into account easy disassembly and assembly, which is convenient for maintenance or replacement when necessary.

[0081] Furthermore, the elastic member used in the present application has good elastic recovery ability and durability. In the specific implementation process, the elastic member is a spring member 61. The design of the spring member 61 is that the present application can quickly generate a restoring force when the transmission rod 4 deviates from the predetermined position, so that it returns to the correct position. The size and direction of this restoring force can be achieved by adjusting the parameters of the elastic member to adapt to different work requirements. The design of the bending member 62 further enhances the stability of the reset device 6 and reduces the stress concentration phenomenon. At the same time, the bending member 62 is fixedly connected to the fixed portion 31 by the screw 311. This connection method is not only firm and reliable, but also easy to adjust and replace. When it is necessary to adjust the reset force or position of the reset device 6, it can be achieved by rotating the screw 311, which greatly improves the convenience of operation.

[0082] Other details that are the same as those in Example 1 are not described in detail in this application.

[0083] Example 4

[0084] like Figure 1-3 As shown, what is different from Example 1 is: in order to further improve the control effect of the pull-wire 43 switch auxiliary reset to prevent misoperation device on the transportation device 5 in the present application, further, the pull-wire 43 switch auxiliary reset to prevent misoperation device is symmetrically arranged along both sides of the transportation device 5, and at least one group of pull-wire 43 switch auxiliary reset to prevent misoperation device is symmetrically designed on both sides of the transportation device 5, and the pull-wire 43 switch auxiliary reset to prevent misoperation devices on one side of the transportation device 5 are all connected by the same pull rope.

[0085] Specifically, the devices are symmetrically arranged along the two sides of the transport device 5, which can not only balance the pulling force on both sides and reduce the deviation caused by uneven force on one side, but also enable the devices to act synchronously when triggered, thereby enhancing the overall control effect. On each side of the transport device 5, at least one set of pull wire 43 switch auxiliary reset and anti-malfunction device is designed and installed. Such a design ensures that even if a device on one side fails, the device on the other side can continue to work, thereby improving the redundancy and reliability of the system. At the same time, the devices on both sides are ensured to work in a coordinated manner through a carefully designed layout and connection method, so as to jointly achieve effective control of the transport device 5.

[0086] More importantly, all the pull rope 43 switch auxiliary reset and anti-malfunction devices on one side of the transport device 5 in this embodiment are connected by the same pull rope. This design greatly simplifies the layout and connection complexity of the pull rope, and reduces the probability of failure. When the device needs to be triggered, only this pull rope needs to be pulled to trigger all related devices at the same time, achieving fast and accurate control response. In addition, in order to further improve the reliability and durability of the system, the pull rope in this embodiment is made of high-strength and wear-resistant materials. At the same time, a special anti-slip structure and reinforcement measures are provided at the connection between the pull rope and the device to ensure that the pull rope will not loosen or fall off during long-term use.

[0087] In summary, this embodiment further improves the control accuracy, response speed and reliability of the system by optimizing the installation layout and connection method of the auxiliary reset anti-malfunction device of the pull wire 43 switch. At the same time, by adopting high-strength, wear-resistant materials and a special anti-slip structure, the stability and durability of the system during long-term use are ensured.

[0088] Other details that are the same as those in Example 1 are not described in detail in this application.

[0089] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A pull-wire switch auxiliary reset and malfunction prevention device, characterized in that: It comprises a main body (1) and a control device (2) arranged on the main body (1), the main body (1) is fixedly arranged on a base (3), and the control device (2) is electrically connected to a transmission rod (4) and a transport device (5); The control device (2) has an input end electrically connected to the transmission rod (4) and an output end electrically connected to the transport device (5), and is used to drive the transport device (5) to start and stop; The transmission rod (4) is rotatably arranged on the body (1) via an axis (41), and the control device (2) drives the start and stop of the transport device (5) by transmitting a signal of the transmission rod (4) rotating along the axis (41) to the control device (2); A reset device (6) is fixedly connected to at least one side of the transmission rod (4) away from the axis (41); One end of the resetting device (6) is connected to the transmission rod (4), and the other end is connected to the base (3).

2. A pull-wire switch auxiliary reset and malfunction prevention device according to claim 1, characterized in that: The control device (2) includes a first state and a second state; When the control device (2) enters the first state, the transport device (5) is in a stagnant state; when the control device (2) enters the second state, the transport device (5) is in a transport state; When the transmission rod (4) rotates clockwise along the axis (41) by an angle greater than an angle a, the control device (2) enters a first state; When the transmission rod (4) rotates clockwise along the axis (41) by an angle of 0-a, the control device (2) enters the second state.

3. A pull-wire switch auxiliary reset and malfunction prevention device according to claim 1, characterized in that: The base (3) is provided with at least one, and the base (3) is provided with a fixing portion (31), an extending portion (32), and a connecting portion (33) connected to the resetting device; The fixing portion (31) is used to fix the body (1) on the platform (7); The extending portion (32) is vertically connected to the fixing portion (31) and the connecting portion (33); The connecting portion (33) is fixed to the main body (1).

4. A pull-wire switch auxiliary reset and malfunction prevention device according to claim 3, characterized in that: Transmission rings (42) are respectively arranged on both sides of the transmission rod (4) away from the axis (41), and at least one of the transmission rings (42) is fixedly connected to the reset device (6).

5. A pull-wire switch auxiliary reset and malfunction prevention device according to claim 4, characterized in that: At least one pull wire (43) is fixedly arranged on a side of the transmission ring (42) away from the reset device (6), and the pull wire (43) is oriented away from the reset device (6).

6. A pull-wire switch auxiliary reset and malfunction prevention device according to claim 4, characterized in that: One end of the reset device (6) is fixedly connected to the transmission ring (42), and the other end of the reset device (6) is fixedly connected to the fixing portion (31) via a screw rod (311).

7. A pull-wire switch auxiliary reset and malfunction prevention device according to claim 6, characterized in that: The resetting device (6) comprises an elastic member (61) and a bending member (62) connected to the elastic member (61); The elastic member (61) is connected to the extension buckle (421) of the transmission ring (42) via a first buckle (611); The bending piece (62) is fixedly connected to the fixing portion (31) via a screw rod (311).

8. A pull-wire switch auxiliary reset and malfunction prevention device according to claim 7, characterized in that: The elastic member (61) is a spring member, and the bending member (62) is made of metal.

9. A pull-wire switch auxiliary reset and malfunction prevention device according to claim 5, characterized in that: The pull-wire switch auxiliary reset and malfunction prevention devices are symmetrically arranged along the two sides of the transport device (5), and at least one set of the pull-wire switch auxiliary reset and malfunction prevention devices is symmetrically designed on the two sides of the transport device (5).

10. A pull-wire switch auxiliary reset and malfunction prevention device according to claim 9, characterized in that: The pull-wire switch auxiliary reset and malfunction prevention devices on one side of the transport device (5) are all connected via the same pull wire (43).

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