Fall prevention for construction machinery

Abstract

To provide an improved fall prevention device for construction machinery that simplifies handling and reduces installation time. [Solution] A fall prevention device (1) for construction machinery is provided, comprising a handrail (2), a mounting assembly (4), and a plurality of support columns (5) arranged at intervals along the X-axis of the Cartesian XYZ coordinate system of the fall prevention device (1) and configured to support the handrail (2) and the mounting assembly (4), wherein the handrail (2) and the mounting assembly (4) are arranged parallel and spaced apart from each other along the Z-axis of the Cartesian XYZ coordinate system, and a connecting mechanism (6) for connecting the plurality of support columns (5) to the handrail (2) and the mounting assembly (4), wherein the fall prevention device (1) is movable between a transport position (A) and a work position (B) in a plane (XZ) formed by the X-axis and the Z-axis.

Description

Technical Field

[0005] , ,

[0001] The present invention relates to a fall prevention device.

Background Art

[0002] Construction machines, particularly road construction machines such as paving machines, usually have a control panel for controlling the construction machine, at least one driver's seat, and other control devices, and have an operator station where one or more operators or drivers are present during operation. In order to obtain a better overview of the construction machine and for monitoring, maintaining, and operating the construction machine, often a platform or catwalk is provided on one or both sides of the construction machine to facilitate the operation of the construction machine.

[0003] ​​​​​​​​​​​​​​​Conventional handrails used as fall prevention devices are, for example, permanently attached to construction machinery or can be assembled / disassembled as a single unit. Alternatively, they consist of multiple parts that must be manually unlocked, manually moved from the transport position to the work position, and then locked again. Operators may be positioned at high positions depending on the configuration of the construction machinery, for example, on a catwalk that provides only limited space for assembling and disassembling the handrails. Due to the bulky individual parts and limited movement space, assembly is very time-consuming and involves an increased risk of accidents during assembly and disassembly.

[0006] Therefore, the object of the present invention is to provide an improved fall prevention device for construction machinery that can simplify handling and reduce installation time. [Means for solving the problem]

[0007] This objective is addressed by a fall prevention device having the features of claim 1. Advantageous further developments of the present invention are described in the dependent claims.

[0008] The fall prevention device for construction machinery according to the present invention comprises a handrail, a mounting assembly, a plurality of support columns arranged at intervals along the X-axis of the Cartesian XYZ coordinate system of the fall prevention device and arranged parallel and spaced apart from each other along the Z-axis of the Cartesian XYZ coordinate system, configured to support the handrail and mounting assembly, and a connecting mechanism for connecting the plurality of support columns to the handrail and mounting assembly, the connecting mechanism enabling the fall prevention device to move between a transport position and a work position in a plane formed by the X-axis and the Z-axis.

[0009] The above fall protection devices ensure a rapid installation process and reliable assembly and disassembly of the fall protection devices.

[0010] Movement between the transport position and the work position can be achieved, for example, by using a parallelogram guide or a vertical guide.

[0011] The handrail may have open or closed cross-sections of different shapes, such as circular, rectangular, or elliptical. End caps may be attached to each end section of the handrail. The end sections may be formed in a curved shape. Preferably, one of the end sections has a length sized to extend across the width of the catwalk. Side protection may be attached to this end section to prevent the operator from falling or dropping. The side protection may be U-shaped and may have a circular, rectangular, or elliptical tubular shape. Multiple support elements may be formed on the handrail. The support elements are preferably rod-shaped and extend downward from the handrail in the Z-axis direction. At the working position, the support elements preferably function as stabilizing elements. During the deployment and folding of the fall protection device, the support elements may function as guide aids.

[0012] The fall prevention device may include a knee rail. The knee rail may be positioned parallel to and spaced apart from the handrail in the vertical direction (Z-axis direction). The knee rail may have a tubular shape like the handrail and is usually located in the center between the handrail and the mounting assembly. The distance between the knee rail and the handrail should not exceed 50 cm. Multiple knee rails may also be provided.

[0013] The mounting assembly may comprise a base plate, a front side wall, a rear side wall, and two lateral side walls connecting the front and rear side walls to form an upward-opening box shape. Multiple support posts may be movably positioned relative to the box shape. In an advantageous embodiment, the mounting assembly may be configured without a rear side wall. The mounting assembly may be movably positioned relative to multiple support posts. The mounting assembly may be a fall protection device or a toe plate for a handrail.

[0014] Multiple support posts are arranged at regular intervals along the longitudinal direction of the fall protection device to support handrails and mounting assemblies that are arranged parallel and spaced apart from each other in the height direction. Each of the multiple support posts can be attached to the inner surfaces of the front and rear walls of the mounting assemblies. The support posts may have multiple holes for attaching handrails and mounting assemblies, and optionally knee rails, at different heights depending on the specifications.

[0015] In actual embodiments, the fall protection device includes a handle for manually moving the fall protection device between a transport position and a work position. The formation of the handle allows for effective and safe movement of the fall protection device between the transport position and the work position.

[0016] In practical embodiments, the working position can be adjusted by a locking element. In this way, the fall protection device can be prevented from tipping over due to impact or the operator leaning on it, potentially leading to injury. The locking element may be configured to allow only one defined working position. Alternatively, the locking element may be configured to allow individually adjustable working positions. In particular, the fall protection device may be adjustable to different heights.

[0017] In particularly advantageous modifications, the locking element is formed on the mounting assembly. Specifically, the locking element is formed on the side opposite to the side where the side protection is provided. The locking element functions to lock the fall protection device in the working position. In further modifications, the locking element may be provided on the same side as the side protection.

[0018] Advantageously, the fall protection device may further include a linear actuator to assist in movement between the transport position and the work position. The linear actuator may be a gas spring. Since fall protection devices or handrails used in construction machinery are usually manufactured from metal and can sometimes be formed in very large sizes, it is advantageous to provide mechanical assistance for the installation or folding of the fall protection device to further reduce the risk of injury. The linear actuator may be mounted in a mounting assembly. The linear actuator may be housed in a recess formed in the mounting assembly. This prevents the operator from getting caught in the linear actuator, thereby further reducing the risk of injury. The recess may be formed in the front side wall panel, the rear side wall panel, or between them.

[0019] In a linear actuator or electric cylinder, an electric motor functions as the drive unit. This is often a servo motor. The motor may be coupled to gears, but typically the motor generates motion directly via a screw spindle. The spindle can be extended or retracted by left / right rotation. Limitations of motion can be obtained by the application itself or by limit switches. The linear actuator generates pressing and compressing forces to move the fall protection device between a transport position A and a working position B. The arrival of the fall protection device at transport position A and / or working position B may be indicated by outputting a visual or audible signal.

[0020] Linear actuators have the advantage of being wear-free and requiring virtually no maintenance. Furthermore, they are easy to integrate without affecting the overall size, exhibit high repeatability, and can transmit high forces according to the specifications of the fall protection device. Additionally, linear actuators are self-locking and do not require additional locking mechanisms.

[0021] In actual embodiments, the fall protection device is supported by its own weight in the transport position. Furthermore, the fall protection device can be locked in the transport position by a locking mechanism. This eliminates the need for additional locking elements, preventing increased costs and parts. In addition, the installation process is improved. Due to the box-shaped configuration of the mounting assembly, multiple support columns can be configured to be movable within the box-shaped mounting assembly such that the transport position is limited by the height of the side walls of the mounting assembly.

[0022] Advantageously, the connection mechanism is a pivot joint at the connection point of multiple posts, so that the movement between the transport position and the working position acts as a parallelogram guide. The parallelogram guide creates an open degree of freedom used for adjustment. In particular, this allows movement in the XZ plane around the pivot joint. The pivot joint may be formed by holes formed in the posts and bolts inserted into those holes. The connection points are the attachment points of the posts to the handrails and mounting assemblies, and, where applicable, to the knee rails. Multiple holes may be formed along the longitudinal or extending direction of the posts. Screws can also be used as pivot joints. In practical embodiments, a handle is formed on one of the multiple posts. The handle can be mounted on the side opposite to the side on which the side protection is formed. The handle can be mounted on one side of the posts. The operator moves the fall protection device by grasping the handle and pulling toward the working position and pushing toward the transport position. By attaching the handle to the side, the fall protection device can be installed and folded in a quick and easy manner.

[0023] According to one embodiment, the locking element comprises a latch element that engages with a corresponding portion formed on one of a plurality of support columns. This ensures secure locking of the fall protection device in the working position. The latch element may be a latch pin mounted on one of the plurality of support columns, and the corresponding portion may be an engaging element in the form of a recess formed in one of the support columns. The recess may be formed in a guide element. The guide element may have a conical guide surface configured to guide the latch pin into and within the recess. A return spring may be formed in the latch pin, and its restoring force enables latching and unlocking. Latching and unlocking of the latch pin can be achieved by the operator manually moving the latch pin.

[0024] The latch element may be a latch tab attached to the mounting assembly, and the corresponding part may be a latch element in the form of a recess formed in one of the struts. Alternatively, the latch element may be an intermediate member in the form of a rod-shaped element. In this case, the struts are configured as a double strut, where the rod-shaped element is positioned between the two struts. The locking element may be configured as a snap lock, in which the latch element is configured to move upward by pressure applied by the strut with the recess or the intermediate member of the double strut when the fall protection device is moved to the working position, and then to latch into the recess or intermediate member. On the side where the latch element is formed, the locking element may be provided with a return spring, the restoring force of which enables latching and unlocking. Latching and unlocking of the latch element can be achieved by manual movement of the fall protection device by the operator. Alternatively, a lock / unlock mechanism can be configured on the locking element to lock the locking element in the working position and release it from this position. Instead of a double strut, a single strut in the form of a C-shaped bent sheet metal piece can be used as an alternative. In this case, the opening is formed on the side facing the latch tab, where the latch tab engages with the intermediate member. Alternatively, the opening may also form a recess into which the latch tab engages.

[0025] According to one embodiment, the fall prevention device is supported at the transport position by the weight of the mounting assembly. Also in this case, no additional locking elements are required, thus preventing an increase in cost and the number of parts. Furthermore, the installation process is improved.

[0026] According to a further embodiment, the connection mechanism is a guide formed on the mounting assembly, and the movement between the transport position and the working position is a vertical guide. The guide can optionally be configured as a tubular element having a round or cuboid cross-section through which the support column is passed. One or more, preferably two, tubular elements can be used. Alternatively, the guide can be configured as a collar arranged and attached around the support column. Also in this case, one or more, preferably two, collars can be used.

[0027] In this embodiment, the handrail can also have an open or closed cross-sectional shape with different shapes such as circular, cuboid, or elliptical. By using the handrail, the fall prevention device or the handrail can be moved to the working position in a quick and easy manner by pulling it up and automatically locking it. According to this embodiment, by pulling the handle, it can also be moved to the transport position in a similarly quick and easy manner.

[0028] The handle is advantageously formed on the mounting assembly. By attaching the handle to the mounting assembly, the fall protection device or handrail can be pulled to the transport position by the operator's hand or foot. The handle is preferably mounted on the upper side of the mounting assembly, particularly on the upper side of the rear wall. The handle can be located in the center of the mounting assembly. Furthermore, the length of the handle can be sized to extend over at least one-third of the length of the mounting assembly. The length of the handle can extend over half of the upper side or the entire length of the mounting assembly. Alternatively, the handle can also be formed on the front side of the mounting assembly. In this case as well, the length of the handle can extend over one-third or half of the length, or over the entire length of the mounting assembly. In a more advantageous variation, two handles can be formed on the upper side or the front side of the mounting assembly. The number and / or length of the handles can be selected according to the dimensions and weight of the fall protection device.

[0029] According to an advantageous embodiment, the handle can be, for example, a trapezoidal rod having a circular or elliptical cross-section. The end sections of the trapezoidal rod are, for example, bent outwards so as to be able to be attached to the upper side of the mounting assembly. The handle can be attached to the front wall or the rear wall. Plate-shaped attachment members are provided at each end section and can be welded to the handle or connected by friction fitting. Alternatively, the end sections of the trapezoidal rod can be formed flat or plate-shaped. The plate-shaped attachment member has, for example, one or more through holes. The mounting plate can be attached to the inner surface of the front wall or the rear wall. The mounting plate is, for example, formed in an L-shape, with the short leg of the L-shape at the upper height and projecting inwards to function as a support surface and being attached to the front wall or the rear wall. The long leg of the L-shape can be attached to the inner surface of the front wall or the rear wall using screws or bolts. The short leg of the L-shape has, for example, through holes corresponding to the number of through holes in the plate-shaped attachment member. The plate-shaped attachment member is, for example, screwed to the mounting plate using screws. The mounting plate optionally functions as a reinforcement to ensure secure attachment of the handle. The legs of the L-shape can be of equal length.

[0030] According to one embodiment, the locking element is a screw-shaped element that interacts with the guide to lock the fall prevention device in the working position. The screw-shaped element comprises a screw head and a shaft. The shaft of the screw-shaped element can be formed with or without threads. The latch element can be formed on the guide.

[0031] When the fall prevention device is brought into the working position by being pulled upwards, the automatic locking can be achieved by a snap lock in which the latch tab can engage in the recess. By pulling the handle, the engagement between the latch tab and the recess can be released and the fall prevention device can be moved to the transport position.

[0032] Furthermore, the mounting assembly may include a U-shaped support to accommodate the knee rail when the fall protection device is in the transport position.

[0033] The fall prevention device according to the present invention may be configured as a module, and depending on the construction machine, two or more fall prevention modules can be connected to each other by screw connections.

[0034] Each of the embodiments described above or any of the advantageous further developments ensures a rapid installation process and safe assembly and disassembly of the fall protection device, while simultaneously reducing the number of parts and saving costs.

[0035] In a further embodiment, the present invention relates to a construction machine equipped with a fall prevention device in any of the embodiments described. The construction machine may, in particular, be a paving machine or a feeder vehicle for supplying to a paving machine. [Brief explanation of the drawing]

[0036] [Figure 1] This is a perspective view of the transport position of a fall prevention device according to the first embodiment of the present invention. [Figure 2] This is a perspective view of the working position of a fall prevention device according to the first embodiment of the present invention. [Figure 3] This is a partial view of Figure 2 showing a locking element on a mounting assembly according to one embodiment, and section D along cross-section AA showing a locking element on one of the support columns according to a further embodiment. [Figure 4] This is an enlarged view of Section D in Figure 3. [Figure 5] This is a perspective view of the transport position of a fall prevention device according to a second embodiment of the present invention. [Figure 6] This is a perspective view of the working position of a fall prevention device according to a second embodiment of the present invention. [Figure 7] This is a detailed diagram of a connection mechanism and locking element according to a second embodiment of the present invention. [Figure 8] This figure shows a construction machine equipped with a fall prevention device mounted on a catwalk. [Modes for carrying out the invention]

[0037] Embodiments of the present invention are described in more detail below with reference to the drawings. In the description and drawings, identical or corresponding components are indicated by the same reference numerals, and their descriptions are not repeated. In the drawings, some components may be omitted or simplified for the sake of brevity of the description.

[0038] In this embodiment, the X, Y, and Z axes of the XYZ Cartesian coordinate system represent the longitudinal direction X, the width direction Y, and the height direction Z, respectively.

[0039] Figure 1 shows a perspective view of the fall protection device 1 according to the first embodiment of the present invention at a transport position A, and Figure 2 shows a perspective view of the fall protection device 1 according to the first embodiment of the present invention at a work position B. The fall protection device 1 is configured as a handrail to be attached to construction machinery, such as road construction machinery, such as paving machinery or feeder vehicles for paving machinery. The fall protection device 1 is mounted in the extending direction, i.e., along the longitudinal direction of, for example, an operator platform or catwalk provided on one or more sides of the construction machinery, enabling the operator to perform work or inspection on the construction machinery.

[0040] The fall protection device 1 comprises a handrail 2 and a mounting assembly 4. The fall protection device 1 may further include a knee rail 9.

[0041] The mounting assembly 4 comprises a base plate 41, a front side wall 42, a rear side wall 43, and two lateral side walls 44 that connect the front side wall 42 and the rear side wall 43 to each other, forming an upward-opening box shape. A recess 45 may be formed in the front side wall 42 to receive a linear actuator 8 as an aid for manual movement by the operator between transport position A and work position B. As stated above, the present invention is not limited thereto, and if a recess 45 is formed, it may also be formed in the rear side wall.

[0042] The handrail 2 is formed in a tubular shape having a circular, rectangular, or elliptical cross-section. End caps 22 can be attached to each end section 21 of the handrail 2. As shown in Figures 1 and 2, in a particular embodiment, one of the end sections 21 is formed to be longer in order to allow a side guard 24 to be attached to it. In addition, a plurality of support elements 23 are formed on the handrail 2, are formed in a rod shape, and extend downward from the handrail 2 in the Z-axis direction.

[0043] Multiple support columns 5 are arranged at regular intervals along the longitudinal direction of the fall protection device 1 to support the handrail 2 and mounting assembly 4, which are arranged parallel and spaced apart from each other in the height direction. Figures 1 and 2 show three support columns 5 as an example. However, depending on the dimensions of the fall protection device 1, more than two or three support columns 5 may be provided. Each of the multiple support columns 5 may be formed as a single column, or as two columns spaced apart from each other in the Y-axis direction, i.e., as a double column. When the multiple support columns 5 are formed as individual columns, they may be formed in the shape of a C-shaped bent sheet metal piece, as shown in Figures 1 and 2.

[0044] The connecting mechanism 6 shown in Figures 1 and 2 is configured as a pivot joint 61 at connection point 62, and the pivot joint is actuated to provide a parallelogram guide. Connection point 62 is the joint between each of the posts 5 and the handrail 2, and between each of the posts 5 and the mounting assembly 4. The joint 61 consists of holes 611 formed in each of the posts 5 and bolts 612 that form connecting members between individual posts or double posts. The bolts 612 are rotatably mounted within the holes 611.

[0045] As shown in Figures 1 and 2, the fall protection device 1 further comprises a handle 7 attached to one side or inside of one of the multiple support columns 5. The operator moves the fall protection device by grasping the handle and pulling it in the direction of the work position and pushing it in the direction of the transport position.

[0046] As shown in Figure 1, at transport position A, the fall protection device 1 rests on one of the lateral walls 44 and is held in this position by its own weight. At transport position A, the fall protection device 1 has a parallelogram shape. As shown in Figure 2, at work position B, the fall protection device 1 is in an upright position and has a rectangular shape. This means that the fall protection device 1 can be moved between transport position A and work position B by unfolding and folding multiple support columns 5 in a plane defined by the X-axis and Z-axis directions. This ensures the rapid installation and safe assembly and disassembly of the fall protection device 1. At work position B, the holding element 23 shown in Figure 2 functions as a stabilizing element and, in the case of the C-shaped bent support column 5, as a stopper. During movement between transport position A and work position B, the holding element 23 functions as a guide aid.

[0047] The locking element 3 is provided on the fall protection device 1 to securely lock the fall protection device 1 in working position B. In the example shown in Figure 3, the locking element 3 takes the form of a latch element in the form of a latch tab 31 formed on the mounting assembly 4, and a latch element 32 provided on one of the support columns 5 in the form of a rod-shaped element or recess, so that the latch tab 31 can engage with the latch element 32. The latch mechanism formed by the locking element 3 can be implemented by a return spring or by manual locking. Alternatively, the locking element 3 is a latch bolt 10, as shown in section D of Figure 3 and in Figure 4.

[0048] Figure 4 shows an enlarged view of section D of Figure 3, illustrating a locking element 3 according to a modification of the first embodiment of the present invention. In this case, the locking element 3 is formed as a latching element by a latch pin 10 and a recess 11 formed in a guide element 12, in which the latch pin 10 engages. To facilitate the guidance of the latch pin 10 into the recess 11, the guide element 12 has a conical guide surface 15 along which the latch pin 10 slides. The locking element 3 is attached to one of a plurality of posts 5 by a bolt 612. A return spring 14 is formed in the latch pin 10, and its restoring force enables latching and unlocking. Latching and unlocking of the latch pin 10 can be achieved by an operator manually moving the latch pin 10.

[0049] Figure 5 shows a perspective view of the fall prevention device 100 according to a second embodiment of the present invention at transport position A, and Figure 6 shows a perspective view of the fall prevention device according to a second embodiment of the present invention at work position. Figure 7 shows a detailed view of the connection mechanism and locking element according to a second embodiment of the present invention. In Figures 5 to 7, components corresponding to components of the first embodiment are indicated by the same reference numerals, and their descriptions will not be repeated.

[0050] The fall protection device 100 shown in Figures 5 and 6 comprises two support columns 5 having a circular cross-section formed integrally with the handrail 2. A knee rail 9 is also provided. Multiple fall protection devices 100 can be provided, which can be connected to each other by mounting devices (not shown). This modular structure has the advantage that the fall protection devices 100 can be used on any construction machinery because the length of each fall protection device 100 can be individually adjusted.

[0051] The second embodiment differs from the first embodiment in that the fall protection device 100 is moved between transport position A and work position B by a vertical guide. For this purpose, the handrail 2 is grasped by the operator, pulled up and automatically locked, thereby moving the fall protection device 100 from transport position A to work position B in a quick and easy manner. When the fall protection device 1 is moved to work position B by being pulled up, automatic locking can be achieved by a snap lock in which the latch tab 37 engages with the recess 38, as shown in Figure 7.

[0052] To release the lock, the operator pulls the handle 7 with their hand or foot. This releases the engagement between the latch tab 37 and the recess 38 of the snap lock 36.

[0053] The handle 7 is configured in the form of a trapezoidal rod 71, as shown in Figures 5 to 7, such that the end sections 72 can be bent outward and attached to the upper part 40 of the mounting assembly 4. In this embodiment, the handle 7 is located on the rear wall 43. Each end section 72 is provided with a plate-shaped mounting member 73, which is welded to the handle 7 or connected by friction fitting. The plate-shaped mounting member 73 has two through holes. The mounting plate 74 is attached to the inner surface of the rear wall 43. The mounting plate 74 is L-shaped, with a short L-shaped leg positioned at the height of the upper part 40 and attached to the rear wall 43 so as to project inward (towards the front wall 42) and function as a support surface. The long L-shaped leg is attached to the inner surface of the rear wall using screws 112. The short L-shaped leg has two through holes. In this embodiment, each of the two through holes is formed. The plate-shaped mounting member 73 is screwed to the mounting plate 74 using screws 110.

[0054] The connection mechanism 6 according to the second embodiment is a guide 63 composed of two cylindrical elements having a rectangular parallelepiped cross-section. The support column 5 is guided within the guide 63 and, with the help of the handrail 2, can be moved from the transport position A shown in Figure 5 to the work position B shown in Figure 6. This is done by pulling the handrail vertically up with the handrail 2. At the work position B, the fall protection device 100 is automatically locked by the locking element 3. In this example, the knee rail 9 functions as a stopper to restrict movement from the work position B to the transport position A. A support 46 is formed on the inner surface of the base plate 41 of the mounting assembly 4, and is configured in a U-shape to receive the knee rail 9. The shape of the support 46 corresponds to the cross-sectional shape of the knee rail 9. The fall protection device 100 is moved from the work position B to the transport position A by the operator grasping the handrail, unlocking it using the handle 7, and then lowering it downwards.

[0055] The locking element 3 according to the second embodiment is a threaded element 33 that interacts with the guide 63 to lock the fall prevention device 100 in the working position B, as shown in Figure 7. The threaded element 33 comprises a threaded head 34 and a shaft 35.

[0056] Figure 8 shows a construction machine 200, in particular a feeder vehicle, which can be optionally used as a paving machine by attaching a screed to the flange of a towing bar, and is equipped with a catwalk 201 and a fall protection device 1. It goes without saying that the construction machine 200 can also be equipped with a fall protection device 100 according to a second embodiment. In addition to being attached to the catwalk 201, the fall protection devices 100 can also be attached to the operator station.

[0057] It should be understood that the embodiments disclosed herein are illustrative in all respects and not limiting. The scope of the invention is defined not by the foregoing description but by the terms of the claims and is intended to include all modifications within the scope and meaning corresponding to the terms of the claims. [Explanation of Symbols]

[0058] 1.100 Fall prevention device (handrail) 2 Handrail 10 Latch bolts 11 recess 12 Guide Elements 14. Return Spring 15 Conical guide surface 21 End section 22 End caps 23 Support elements 24 Side protection 3. Lock elements 31 Latch elements 32. Corresponding part (latch element) 33 Screw shape elements 34 Screw head 35 Shank 36 Latch elements 37 Latch tab 38 recesses 4. Mounting Assembly 40 Upper side 41 Base Plate 42 Front wall 43 Rear side wall 44 Lateral side wall 45 recess 46 Support 5 pillars 6 Connection mechanism 61 Pivot joint 611 hole 612 volts 62 connection points 63 Guide 7 Handle 71 Trapezoidal Rod 72 End Sections 73 Plate-shaped mounting elements 74 L-shaped mounting plate 8 Linear Actuator 9 Knee rail 110 screw 112 screws 200 Construction Machinery 201 Catwalk A Transport position B Working position

Claims

1. A fall prevention device (1, 100) for construction machinery (200), wherein the fall prevention device (1, 100) is Handrail (2), Mounting assembly (4), A plurality of support columns (5) are arranged at intervals along the X-axis of the Cartesian XYZ coordinate system of the fall prevention device (1) and configured to support the handrail (2) and the mounting assembly (4), wherein the handrail (2) and the mounting assembly (4) are arranged parallel to and spaced apart from each other along the Z-axis of the Cartesian XYZ coordinate system, In a fall prevention device (1, 100) equipped with, A fall prevention device for construction machinery, characterized in that the connection mechanism (6) for connecting the plurality of support columns (5) to the handrail (2) and the mounting assembly (4) is formed such that the fall prevention device (1) is movable between a transport position (A) and a work position (B) in a plane (XZ) formed by the X axis and the Z axis.

2. The fall prevention device for construction machinery according to claim 1, further comprising a handle (7) for manually moving the fall prevention device (1) between the transport position (A) and the work position (B).

3. The fall prevention device for construction machinery according to claim 1 or 2, wherein the working position (B) is adjustable by a locking element (3).

4. The fall prevention device for construction machinery according to claim 3, wherein the locking element (3) is formed on the mounting assembly (4) or on one of the plurality of support columns (5).

5. A fall prevention device for construction machinery according to any one of claims 1 to 4, further comprising a linear actuator (8) for assisting movement between the transport position (A) and the work position (B).

6. The fall prevention device for construction machinery according to claim 3, wherein the linear actuator (8) is formed on the mounting assembly (4).

7. The fall prevention device for construction machinery according to claim 5 or 6, wherein the linear actuator (8) is housed in or in a recess (45) formed on or within the mounting assembly (4).

8. The connection mechanism (6) is a pivot joint (61) at the connection point (62) of the plurality of support columns (5), and the movement between the transport position (A) and the work position (B) is guided by a parallelogram, as described in any one of claims 1 to 7.

9. The fall prevention device for construction machinery according to any one of claims 2 to 9, wherein the handle (7) is formed on one of the plurality of support columns (5).

10. The fall prevention device for construction machinery according to any one of claims 3 to 10, wherein the locking element (3) comprises a latching element (10, 31) and a corresponding portion (11, 32) formed on one of the plurality of support columns (5), and these can be engaged.

11. The fall prevention device (1) is supported by its own weight at the transport position (A), as described in any one of claims 1 to 10.

12. The fall prevention device for construction machinery according to any one of claims 1 to 11, wherein the connecting mechanism (6) is a guide (63) formed on the mounting assembly (4) and is configured to act as a vertical guide for movement between the transport position (A) and the work position (B).

13. The fall prevention device for construction machinery according to any one of claims 2 to 12, wherein the handle (7) is formed on the mounting assembly (4).

14. The fall prevention device for construction machinery according to any one of claims 2 to 13, wherein the latch element (3) is a snap lock (36) that interacts with the guide (63) to lock the fall prevention device (1) in the working position.

15. A construction machine (200) equipped with a fall prevention device (1, 100) according to any one of claims 1 to 14.

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