Cargo handling frame

Abstract

To provide a cargo handling frame functioning as a scaffold of a worker when unloading a cargo from a loading platform.SOLUTION: A cargo handling frame 10 comprises: a movable base 110 which can approach to and separate from a loading platform; a rail 120 arranged along the loading platform; and a movement unit 130 allowing movement of the movable base 110 along the rail 120. The movable base 110 includes a work table 111 formed along a width direction crossing to a longitudinal direction of the rail 120. The work table 111 is provided with a fall suppressing part 112 on an end part side opposite to a loading / unloading side for a cargo. The movement unit 130 has at least one first wheel 131 capable of rolling along the rail 120 and a second wheel 132. The first wheel 131 and the second wheel 132 are arranged so that their axles face to directions crossing each other.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a platform that functions as a scaffold when workers perform cargo handling work, such as loading and unloading cargo from a cargo bed on which the cargo is loaded. [Background technology]

[0002] Conventionally, for the purpose of loading and unloading (cargo handling) cargo onto transport vehicles such as trucks, there has been provided a platform having a deck that is approximately the same height as the loading platform and floor of the transport vehicle, allowing workers to move up to deck height.

[0003] As a platform for carrying out such cargo handling, there is provided one disclosed in Patent Document 1. The platform disclosed in Patent Document 1 can be arranged so as to be pulled alongside the bed of a truck. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2015-24872 A

[0005] However, although the platform in Patent Document 1 can be placed alongside a truck, it is not configured to allow workers to access the platform from the rear of the truck. Therefore, there is a demand for a platform that allows workers to access the platform from the rear of the bed of a truck or the like.

[0006] In addition, in the case of transport vehicles such as trucks, if the distance between the loading platform and the platform is not adjusted depending on the parking position, there is a concern that workers may fall off during loading and unloading work. Furthermore, in the case of the platform, fall prevention measures such as fences must be taken as necessary to prevent workers from falling off the platform when they are passing by. Summary of the Invention [Problem to be solved by the invention]

[0007] Therefore, the present invention aims to provide a loading and unloading platform that functions as a foothold for workers when loading and unloading cargo from various loading platforms, including trucks, and that can move forward and backward depending on the position of the loading platform. [Means for solving the problem]

[0008] (1) The loading and unloading platform of the present invention, which is provided to solve the above-mentioned problems, is a loading and unloading platform for a worker to perform loading and unloading work of loading and unloading cargo from a loading platform on which cargo is loaded, and comprises a movable platform that can approach and move away from the loading platform, at least one rail arranged to extend along the loading platform, and at least one mobile unit having at least one wheel that allows the movable platform to move along the rail, wherein the movable platform is arranged at a height that allows a worker to travel from the loading platform and comprises a work platform formed along a width direction that intersects with the longitudinal direction of the rail, and the work platform is provided with a fall prevention section at least on the end side opposite the side where the cargo is loaded and unloaded, and at least one of the mobile units has at least one first wheel and a second wheel that can roll along the rail, and the first wheel and the second wheel are arranged so that their respective wheel axes face in directions that intersect with each other.

[0009] In the loading platform of the present invention described above, the movable platform is at a height that allows workers to travel from the loading platform, and the movable platform can be brought close to the loading platform, thereby reducing the burden on workers to travel during loading and unloading work. In addition, in the loading platform of the present invention, the movable platform can approach toward the loading platform to block the gap between the loading platform and the loading platform. This can prevent the worker from falling from the loading platform or the loading platform. In addition, in the loading platform of the present invention, the work platform of the movable platform has a fall prevention part at the end side opposite to the cargo loading and unloading side, so that the worker can be prevented from falling from the work platform. Here, the fall prevention part can be configured, for example, as a fence or a wall, and is desirably configured to a height that can prevent the worker from falling. Furthermore, in the loading platform of the present invention, the wheel axes of the first wheel and the second wheel that roll on the rail are arranged to face in directions that intersect with each other, so that the deviation of the first wheel and the second wheel from the rail can be prevented, and the movable platform can be stably moved close to and away from the loading platform. Here, it is preferable that one of the wheel axles of the first wheel and the second wheel faces the horizontal direction and the other faces the vertical direction, for example.

[0010] (2) The loading platform of the present invention described above may be characterized in that a pair of moving units are provided on both sides in the width direction, at least one of the moving units has at least one first wheel, a first wheel axle of the first wheel is arranged along the width direction of the movable table, the first wheel is journaled to the first wheel axle of the first wheel, and the first wheel axle is rotatably supported by at least one guide member supported by the movable table and supported movably within a predetermined range along the width direction.

[0011] The loading platform of the present invention described above, by adopting such a configuration, can move the first wheel axle along the width direction (direction intersecting with the rail) of the movable platform (work platform). As a result, the loading platform of the present invention can move the first wheel in the width direction of the movable platform together with the movement of the first wheel axle, so that the mounting adjustment of the movable platform (first wheel) to the rail can be easily performed. As a result, the loading platform of the present invention can improve the mounting freedom of the movable platform with respect to the laying position of the rail.

[0012] (3) The loading and unloading platform of the present invention, which is provided to solve the above-mentioned problems, is a loading and unloading platform for workers to perform loading and unloading work of loading and unloading cargo from a cargo platform on which the cargo is loaded, and comprises a pair of first work platforms arranged at a height that allows the workers to move from the cargo platform and extending in the front-to-rear direction on either side of the cargo platform, a pair of platform bodies having platforms for supporting each of the pair of first work platforms, a pair of rails arranged to extend along the front-to-rear direction of the pair of platform bodies, a movable platform suspended in a direction intersecting the pair of platform bodies, and a pair of mobile units arranged on both sides of the width of the cargo platform on the movable platform and equipped with at least one wheel that allows movement along the pair of rails, and the movable platform is characterized in that it comprises a second work platform that allows the workers to move, and a fall prevention section erected on at least the end side of the second work platform opposite the side where the cargo is loaded and unloaded.

[0013] The loading platform of the present invention described above includes a pair of platform bodies supporting a pair of first work platforms extending in the front-rear direction across the loading platform, so that even if the loading platform is a long loading platform in a transport vehicle such as a truck, for example, a worker can move between the pair of first work platforms. In addition, the loading platform of the present invention has a movable platform that is spanned in a direction intersecting with the pair of platform bodies, and the movable platform is movable along the width direction of the loading platform. In addition, the movable platform is provided with a second work platform that allows the worker to move between the pair of first work platforms and a fall prevention unit. Therefore, the loading platform of the present invention can allow the worker to move between the pair of first work platforms and the second work platform, so that the efficiency of the work can be improved. In addition, the second work platform is provided with a fall prevention unit, so that the worker can be prevented from falling in the loading and unloading direction of the cargo. Here, the fall prevention unit can be configured, for example, as a fence or a wall, and is desirably configured to a height that can prevent the worker from falling.

[0014] (4) In the loading platform of the present invention described above, at least one of the pair of moving units may have at least one first wheel and a second wheel capable of rolling along the rail, and the first wheel and the second wheel may be arranged to face in directions that intersect with each other.

[0015] The loading platform of the present invention described above can suppress deviation of the first and second wheels from the rails and can stably move the movable platform toward and away from the loading platform. Here, it is preferable that one of the wheel axles of the first and second wheels faces horizontally and the other faces vertically.

[0016] (5) The loading platform of the present invention described above may be characterized in that at least one of the pair of moving units has at least one first wheel, the first wheel is journalled to a first wheel axle arranged along the width direction of the movable platform, and the first wheel axle is rotatably supported by at least one guide member supported by the movable platform and supported so as to be movable within a predetermined range along the width direction of the movable platform.

[0017] The loading platform of the present invention described above, by adopting such a configuration, can move the first wheel axle along the width direction (direction intersecting with the rail) of the movable platform (work platform). As a result, the loading platform of the present invention can move the first wheel in the width direction of the movable platform together with the movement of the first wheel axle, so that the mounting adjustment of the movable platform (first wheel) to the rail can be easily performed. As a result, the loading platform of the present invention can improve the mounting freedom of the movable platform with respect to the laying position of the rail.

[0018] (6) In the loading platform of the present invention described above, it is preferable that the first wheel axle is provided with a locking mechanism for switching between an unlocked state that allows rotation of the first wheel axle and a locked state that prevents rotation of the first wheel axle.

[0019] The loading platform of the present invention described above can switch the first wheel axle between an unlocked state and a locked state by configuring as described above. Here, since the first wheel is pivoted to the first wheel axle, it can be switched between an unlocked state and a locked state in the same manner as the first wheel axle. This allows the loading platform of the present invention to fix the movable platform at a predetermined position relative to the loading platform. As a result, the loading platform of the present invention can prevent the movable platform from moving unexpectedly, and therefore can prevent workers from falling during loading and unloading operations.

[0020] (7) In the loading platform of the present invention described above, the first wheel axle is provided with a locking mechanism for switching between an unlocked state that allows rotation of the first wheel axle and a locked state that prevents rotation of the first wheel axle, and the locking mechanism includes a gear that is journalled to the first wheel axle and rotates synchronously with the first wheel, and a braking member that is supported by the movable base and can move back and forth between an advanced position in which it meshes with the gear and a released position in which it is released from meshing with the gear, and the braking member advances towards the gear, thereby engaging with the gear and putting the first wheel axle in the locked state, and the braking member retreats from the gear, thereby releasing meshing with the gear and putting the first wheel axle in the unlocked state.

[0021] The loading platform of the present invention described above, by being configured as described above, can reliably switch between the unlocked state and the locked state of the first wheel axle with a simple mechanism. Furthermore, the loading platform of the present invention can fix the movable platform at a predetermined position relative to the loading platform, thereby preventing the movable platform from moving unexpectedly. As a result, the loading platform of the present invention can prevent workers from falling over during loading and unloading work. Furthermore, the loading platform of the present invention described above does not matter where the locking mechanism is placed as long as it is on the first wheel axle (including a position adjacent to the first wheel), so the locking mechanism can be placed by effectively utilizing the space in the movable platform.

[0022] (8) In the loading and unloading platform of the present invention described above, the rail is formed to extend along the loading platform and includes a lower wall forming a running surface for the first wheel, an upper wall formed to extend along the loading platform and arranged to face the lower wall via the first wheel, and a side wall formed along the lower wall and the upper wall and erected to form a running surface for the second wheel on the widthwise outer side of the lower wall and the upper wall, wherein the upper wall faces the side wall at one widthwise end side and has a flange portion protruding downward, and the lower wall has a protruding wall protruding downward at one widthwise end side opposite the side wall.

[0023] In the loading platform of the present invention described above, the lower wall forming the running surface of the first wheel is provided with a protruding wall protruding downward at one end side in the width direction opposite to the side wall, so that the strength of the lower wall can be increased. As a result, the loading platform of the present invention described above can suppress the deflection and deformation of the rail, so that the movable platform can be moved more stably. In addition, the loading platform of the present invention described above has an upper wall that faces the lower wall via the first wheel, so that the first wheel can be suppressed from moving (vibrating) in the vertical direction. Therefore, the loading platform of the present invention described above can suppress the movable platform from vibrating up and down when the movable platform moves. In addition, the loading platform of the present invention described above has an upper wall that faces the side wall at one end side in the width direction and has a flange that protrudes downward, so that the first wheel and the second wheel can be suppressed from moving inward in the width direction of the rail (upper wall and lower wall). As a result, the loading platform of the present invention described above can suppress the first wheel and the second wheel from falling off the rail when the movable platform is traveling, so that the movable platform can be moved stably.

[0024] (9) The loading and unloading platform of the present invention described above may comprise a pair of first work platforms arranged at a height allowing workers to travel between the loading platform and extending in a fore-and-aft direction on either side of the loading platform, and a pair of platform bodies equipped with platforms for supporting each of the pair of first work platforms, the rails being arranged on both widthwise sides of the platform body so as to extend along the fore-and-aft direction of the pair of platform bodies, and the protruding wall being engaged with at least a portion of the platform body.

[0025] In the loading platform of the present invention described above, the protruding wall can be engaged with at least a portion of the platform body, so that the strength of the rail can be increased and the movable platform can travel more stably.

[0026] (10) The loading and unloading platform of the present invention described above may be characterized by having a communication portion that connects the area defined by the lower wall, the upper wall, and the side walls with the inside and outside of the area.

[0027] The loading platform of the present invention described above can discharge rainwater, etc., to the outside of the area defined by the lower wall, upper wall, and side wall of the rail through the communication part, even if rainwater, etc., enters the area defined by the lower wall, upper wall, and side wall of the rail. Here, the area described above forms a storage area in which the first wheel and the second wheel are accommodated so as to be able to run, and the communication part is preferably provided so as to communicate the inside and outside of the storage area. As a result, the loading platform of the present invention described above can prevent the first wheel and the second wheel from slipping, or conversely, the rainwater, etc. from becoming a resistance and reducing the running performance, even in rainy weather, for example. The communication part can be provided in at least one of the lower wall, upper wall, and side wall, and one or more can be formed as necessary. The communication part can be formed in an appropriate shape and size.

[0028] (11) The loading / unloading platform of the present invention, which is provided to solve the above-mentioned problems, is a loading / unloading platform for a worker to perform loading / unloading work of loading / unloading cargo from a cargo bed on which cargo is loaded, and includes a platform body having a first work platform arranged at a height that allows the worker to move from the cargo bed and extending in the fore-and-aft direction of the cargo bed, and a platform for supporting the first work platform, an upper rail arranged to extend along the fore-and-aft direction of the platform body and disposed on the upper side of the platform body, and a platform for supporting the first work platform, Both comprise a lower rail arranged on the lower side of the platform body, a movable platform protruding from the platform body side in the width direction of the loading platform, an upper moving unit supported on the upper end side of the movable platform and allowed to move along the upper rail, and a lower moving unit supported on the lower end side of the movable platform and allowed to move along the lower rail, and are characterized in that the movable platform has a second work platform on which the worker can move, and a fall prevention section erected on at least the end side of the second work platform opposite the side where the cargo is loaded and unloaded.

[0029] In the loading platform of the present invention described above, the upper end side of the movable platform is movably supported by the upper mobile unit, and the lower end side of the movable platform is movably supported by the lower mobile unit, with respect to the platform body arranged along the front-rear direction of the platform. The movable platform is arranged so as to protrude from the platform body side toward the width direction of the platform. That is, in the loading platform of the present invention, the movable platform is supported by a so-called cantilever along the width direction of the platform. Therefore, for example, even if there is space only on one side of the platform in the width direction, the first work platform (platform body) and the second work platform (movable platform) can be arranged. Furthermore, even if the movable platform is a cantilever, it is supported by both the upper end side and the lower end side with respect to the platform body, so that the load-bearing capacity can be secured against the weight of the worker and the cargo. Furthermore, the second work platform has a fall prevention part erected on the end side opposite to the cargo loading and unloading side, so that the worker can be prevented from falling from the second work platform. Here, the fall prevention section can be constituted, for example, by a fence or a wall, and it is desirable to configure it to a height sufficient to prevent the worker from falling.

[0030] Here, when the movable platform is supported by a cantilever on the platform body as described above, it is considered that a further improvement in the load resistance is required, particularly when the weight of the cargo increases.

[0031] (12) In order to solve such problems, in the loading platform of the present invention described above, it is desirable that the upper moving unit has at least one upper wheel capable of rolling along the upper rail, the lower moving unit has at least one first lower wheel and a second lower wheel capable of rolling along the lower rail, the upper wheels are constrained from moving in the width direction of the loading platform by the upper rail, a first lower wheel axle of the first lower wheel is arranged along the width direction of the loading platform, and a second lower wheel axle of the second lower wheel are arranged in directions that intersect with each other, the first lower wheel is constrained from moving in the width direction by the lower rail, and the second lower wheel is arranged so as to abut against the lower rail from the width direction.

[0032] In the loading platform of the present invention described above, the upper wheels are restrained from moving in the width direction of the platform by the upper rail, so that even if the weight of a worker or cargo is placed on the second work platform, the upper wheels can be prevented from departing from the upper rail. Furthermore, in the loading platform of the present invention, the first lower wheel is restrained from moving in the width direction of the platform by the lower rail, and the second lower wheel is arranged to abut against the lower rail from the width direction. Therefore, the loading platform of the present invention can support the weight of a worker or cargo on the second work platform by the lower rail (platform main body). Therefore, the loading platform of the present invention can ensure sufficient load resistance even when the movable platform is supported by a cantilever.

[0033] (13) In the loading platform of the present invention described above, it is preferable that the first lower axle is provided with a locking mechanism for switching between an unlocked state that allows rotation of the first lower axle and a locked state that inhibits rotation of the first lower axle.

[0034] The loading platform of the present invention described above can switch the first lower wheel axle between an unlocked state and a locked state by configuring as described above. Here, since the first lower wheel is pivoted to the first lower wheel axle, it can be switched between an unlocked state and a locked state in the same manner as the first lower wheel axle. This allows the loading platform of the present invention to fix the movable platform at a predetermined position relative to the loading platform. As a result, the loading platform of the present invention can prevent the movable platform from moving unexpectedly, and therefore can prevent workers from falling during loading and unloading operations.

[0035] (14) In the loading platform of the present invention described above, the locking mechanism may include a gear that is journalled to the first lower wheel axle and rotates in synchronization with the first lower wheel, and a braking member that is supported by the movable platform and can move back and forth between an advanced position in which it meshes with the gear and a released position in which it is released from meshing with the gear, and the braking member advances towards the gear, thereby engaging with the gear and bringing the first lower wheel axle into the locked state, and the braking member retracts from the gear, thereby releasing the meshing with the gear and bringing the first lower wheel axle into the unlocked state.

[0036] The loading platform of the present invention described above, by being configured as described above, can reliably switch between the unlocked state and the locked state of the first lower wheel axle with a simple mechanism. Furthermore, the loading platform of the present invention can fix the movable platform at a predetermined position relative to the platform, thereby preventing the movable platform from moving unexpectedly. As a result, the loading platform of the present invention can prevent workers from falling over during loading and unloading work. Furthermore, the loading platform of the present invention described above does not matter where the locking mechanism is placed as long as it is on the first lower wheel axle (including a position adjacent to the first lower wheel), so the locking mechanism can be placed by effectively utilizing the space in the movable platform.

[0037] (15) In the loading platform of the present invention described above, the platform body may be characterized by having platform-side wheels that allow movement of the loading platform at least along the width direction.

[0038] The loading platform of the present invention described above can move the platform body in the width direction of the platform (direction intersecting with the rails) by being configured as described above. As a result, the loading platform of the present invention can move the first work platform (platform body) and the second work platform (movable platform) together along the platform width direction as the loading platform of the present invention moves along the platform width direction. Therefore, the loading platform of the present invention can easily adjust the positions of the platform body and the movable platform even if, for example, the stopping position of a truck or the like is shifted. Effect of the Invention

[0039] According to the present invention, it is possible to provide a loading platform that functions as a foothold for workers when loading and unloading cargo from various loading platforms, including trucks, and it is also possible to provide a loading platform that can move forward and backward depending on the position of the loading platform. [Brief description of the drawings]

[0040] [Figure 1] FIG. 2 is a plan view showing an example of use of the loading and unloading platform according to the first embodiment of the present invention. [Diagram 2] This shows the loading platform of Figure 1. (a) is a front view, (b) is a plan view, and (c) is a left side view. [Diagram 3] 2 is a cross-sectional view taken along the line AA in FIG. 1. [Figure 4] 2 shows the movable platform of the loading platform of FIG 1. (a) is a plan view, (b) is a cross-sectional view showing the arrangement of the rails and the first wheel, and (c) is a cross-sectional view showing the arrangement of the rails and the second wheel. [Diagram 5] 2A is an explanatory diagram showing a state in which the movable platform of the loading platform in FIG. 1 is separated from the bed of the truck, and FIG. 2B is an explanatory diagram showing a state in which the movable platform has moved close to the bed of the truck. [Figure 6] 2 is a conceptual diagram showing one side of the loading platform of FIG. 1, illustrating a state in which a worker is performing loading and unloading work with the width-direction movable platform protruding. FIG. [Figure 7] FIG. 11 is a right side view showing the movable platform of the loading platform according to the second embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0041] Hereinafter, each embodiment of the loading platform 10 of the present invention will be described in detail with reference to the drawings. The loading platform 10 of the present invention is used as a foothold for workers to load and unload (load and unload) cargo and luggage onto various loading platforms including the loading platform 4 of a transport vehicle such as a truck 2. The loading platform 10 of the present invention is also used to prevent workers and cargo from falling off the loading platform 4 during loading and unloading work.

[0042] First Embodiment FIG. 1 shows a loading platform 10 according to a first embodiment of the present invention. In the first embodiment, a loading platform 10 used when unloading cargo loaded on a truck 2 (transport vehicle 2) from a bed 4 of the truck 2 or when loading cargo onto the bed 4 of the truck 2 will be described as an example. In the first embodiment, a pair of loading platforms 10, 10 are arranged on both sides of the width direction (short side direction) of the bed 4 will be described as an example. In the first embodiment, the platform main body 20 is arranged on both sides via the bed 4, so that the platform main body 20 on one side will be described and the description of the platform main body 20 on the other side may be omitted unless it is necessary to distinguish between them.

[0043] The loading platform 10 is a work platform on which workers move when loading cargo onto the loading platform 4 and unloading cargo from the loading platform 4. As shown in Fig. 2, the loading platform 10 has a long appearance and is used for loading and unloading operations with the truck 2 stopped parallel to the longitudinal direction.

[0044] 2(a), the loading platform 10 has a platform body 20, a width direction movable platform 50, first guide mechanisms 60a, 60b, and 60c, a driving unit 70, and power transmission mechanisms 80a and 80b. In addition to the above, the loading platform 10 also has a movable platform 110 and rails 120.

[0045] As shown in FIG. 2(c), the loading platform 10 is configured such that the width-direction movable platform 50 can be moved over a distance L1 so as to protrude from the platform body 20. The width-direction movable platform 50 is guided by the first guide mechanisms 60a, 60b, and 60c, and is moved to protrude in a first direction X1 (first direction) that is the width direction of the platform body 20 by transmitting power through the power transmission mechanisms 80a and 80b. Therefore, as shown in FIG. 1, when the truck 2 is stopped in parallel with the loading platform 10, the width-direction movable platform 50 can slide toward the truck 2 to close the gap that exists between the platform body 20 and the platform 4. This allows the loading platform 10 to prevent the worker from falling off the platform 4.

[0046] 1, the loading platform 10 has a movable platform 110 that can move toward and away from the rear end side of the loading platform 4. The movable platform 110 can close the gap between the rear end side of the loading platform 4 and the movable platform 110 by sliding toward the rear end side of the loading platform 4, as will be described in detail later. This makes it possible for the loading platform 10 to prevent the worker from falling off the rear of the loading platform 4.

[0047] Hereinafter, the details of each component of the loading platform 10 will be described with reference to the drawings. Note that in the following description, unless there is a particular need to distinguish between them, the platform body 20 on one side, which is disposed along the right side of the loading platform 4 in a plan view, will be described.

[0048] 1 and 6, the platform body 20 functions as a platform for a worker to ascend and descend to the loading platform 10 and load onto the truck 2. As shown in Fig. 2, the platform body 20 has a first work platform 22, six pillars 24, 25, 26, 27, 28, 29, beams 30, 31, a rail 120, a handrail 34, a staircase 32, and the like.

[0049] The frame body 20 is formed by assembling the pillars 24, 25, 26, 27, 28, 29 and the beams 30, 31 to form a framework, and supports the first work platform 22. The first work platform 22 is supported by six pillars 24, 25, 26, 27, 28, 29 and disposed at substantially the same height as the floor surface of the loading platform 4. This allows workers to easily move between the floor surface of the loading platform 4 and the first work platform 22. The work platform 22 also functions as a main movement space for workers during loading and unloading work. A pair of rails 120, 120 are disposed on the pair of frame bodies 20, 20 so as to extend along the front-rear direction (longitudinal direction). Details of the rails 120, 120 will be described later.

[0050] As shown in Fig. 2(a), the support pillar 25 disposed at approximately the center in the longitudinal direction of the loading platform 10 is disposed penetrating the width-direction movable platform 50 described later. The support pillar 25 has a portion in the middle in the longitudinal direction (vertical direction) that is thinner than the other portions, and the thinner portion is configured to penetrate a through groove 52a (see Fig. 2(b)) provided in the width-direction movable platform 50. The through groove 52a is formed so that the support pillar 25 and the width-direction movable platform 50 do not interfere with each other when the width-direction movable platform 50 moves in a first direction X1, which is the width direction of the platform main body 20.

[0051] The width-direction movable platform 50 is movable forward and backward along a first direction X1, which is the width direction of the platform body 20. As described above, the loading platform 10 is used for loading and unloading work by stopping the truck 2 along the longitudinal direction. The width-direction movable platform 50 closes the gap between the platform body 20 and the truck 2 by sliding in the first direction X1 toward the side of the truck 2 stopped along the longitudinal direction of the loading and unloading platform 10. In addition, the width-direction movable platform 50 functions as a foothold for the loading and unloading work of the worker together with the first work platform 22, which functions as a deck portion when the worker performs the loading and unloading work.

[0052] 2(b), the width-direction movable platform 50 is a long plate body having a substantially rectangular appearance in a plan view. The width-direction movable platform 50 has a length covering substantially the entire length of the loading platform 10 in the longitudinal direction, and the length in the longitudinal direction in a plan view is substantially the same as that of the first work platform 22. The width-direction movable platform 50 is attached to the platform body 20 via first guide mechanisms 60a, 60b, and 60c described later, and is disposed below the first work platform 22.

[0053] The first guide mechanisms 60a, 60b, and 60c are provided to guide the travel path of the width-direction movable base 50 to move the width-direction movable base 50 smoothly. The first guide mechanisms 60a, 60b, and 60c have appropriate travel wheels (not shown). The first guide mechanisms 60a, 60b, and 60c also have three rails (not shown) arranged side by side on both sides and in the middle of the width direction (longitudinal direction) of the pedestal body 20. The first guide mechanisms 60a, 60b, and 60c guide the travel path of the width-direction movable base 50 so that it is approximately horizontal and approximately straight in the first direction X1 by guiding the travel wheels along the three rails. The width-direction movable base 50 is also maintained in an approximately horizontal position by an appropriate support means.

[0054] 6, the width-direction movable platform 50 is slid toward the loading platform 4 to project outward from the platform body 20 in the first direction X1 from below the first work platform 22. That is, in the loading platform 10, when the width-direction movable platform 50 is moved so as to project outward from the platform body 20, the width-direction movable platform 50 functions as a space for workers to move around. As a result, the loading platform 10 allows the upper surface of the width-direction movable platform 50 to function efficiently as a working space.

[0055] 2, the driving unit 70 is for transmitting the power for moving the width-direction movable base 50 to the power transmission mechanisms 80a, 80b. The driving unit 70 transmits the power applied to the operating unit 72 to the power transmission mechanisms 80a, 80b through the operating unit 72 and appropriate gears and chains (neither of which are shown).

[0056] The operation unit 72 is configured as a handle, and an operator can apply power for driving the width-direction movable platform 50 by rotating the handle. The operation unit 72 is taken out above the first work table 22. This allows an operator to operate the operation unit 72 while checking the presence or absence of a gap between the track 2 and the platform body 20 from above the first work table 22.

[0057] The power transmission mechanisms 80a and 80b are provided to transmit power to the width-direction movable platform 50 by the operator operating the operation unit 72, thereby enabling the width-direction movable platform 50 to be moved. The power transmission mechanisms 80a and 80b are configured by appropriate means such as a chain-sprocket mechanism, a rack-and-pinion mechanism, a timing belt, etc. In this embodiment, the loading platform 10 is configured to have a pair of power transmission mechanisms having the same configuration. As shown in FIG. 2(a), the power transmission mechanisms 80a and 80b are arranged so as to be located below the first work platform 22 and the width-direction movable platform 50. Also, as shown in FIG. 2(a), the power transmission mechanisms 80a and 80b are arranged on both sides of the platform body 20 in the longitudinal direction. The power transmission mechanism 80a is arranged on the staircase 32 side, and the power transmission mechanism 80b is arranged on the opposite side to the staircase 32 side.

[0058] Next, rails 120, 120 for guiding the movement of the movable platform 110 via moving units 130L, 130R (described later) will be described with reference to Figures 1, 3, and 4. Since the rails 120, 120 are disposed symmetrically across the platform 4, only the rail 120 on one side will be described below.

[0059] 1, the rail 120 is formed to extend along a second direction X2 (second direction) which is the longitudinal direction of the rack body 20. That is, the rail 120 is formed to extend along the platform 4. As shown in FIGS. 3 and 4, the rail 120 includes a lower wall 123, an upper wall 121, a side wall 125, and the like, which extend along the second direction X2.

[0060] In this embodiment, the lower wall 123 is formed flat in the horizontal direction, and the upper surface side forms a running surface for a first wheel 131 described later. The lower wall 123 also has a protruding wall 124 protruding downward at one end side in the width direction (first direction X1, see FIG. 2(b)) opposite to a side wall 125 described later.

[0061] The protruding wall 124 is engaged with at least a part of the gantry body 20. Specifically, the protruding wall 124 is engaged with the support 25 on the inside (the loading platform 4 side) of the gantry body 20 in the first direction X1. More specifically, the protruding wall 124 is engaged with the surface of the support 25 on the loading platform 4 side and fixed by an appropriate means such as a bolt. The protruding wall 124 is intended to play a role of reinforcing the lower wall 123. That is, the protruding wall 124 is bent at a predetermined angle (90 degrees in this embodiment) with respect to the lower wall 123, so that the bending strength of the lower wall 123 can be increased. Furthermore, in this embodiment, the protruding wall 124 is engaged with the support 25, so that the strength of the rail 120 can be further increased. The protruding wall 124 may be provided as necessary, and may be provided on either one or both of the rails 120, 120.

[0062] The upper wall 121 is disposed so as to face the lower wall 123 via the first wheel 131. That is, the upper wall 121 is disposed so as to cover the first wheel 131 from above. In this embodiment, the upper wall 121 is disposed parallel to the lower wall 123 at a distance from the lower wall 123 that is substantially the same as or slightly larger than the outer shape of the first wheel 131. Therefore, the upper wall 121 can guide the first wheel 131 on the upper side. The upper wall 121 faces a side wall 125 described later at one end side in the width direction (first direction X1) and has a flange portion 122 that protrudes downward. The flange portion 122 is intended to prevent the first wheel 131 and the second wheel 132 of the moving unit 130 described later from departing from the rail 120.

[0063] The side wall 125 is formed along the lower wall 123 and the upper wall 121, and stands out so as to form a running surface for the second wheel 132 on the outer side of the lower wall 123 and the upper wall 121 in the width direction (first direction X1). Therefore, an opening is formed in the rail 120 on the side facing the loading platform 4. In this embodiment, the lower wall 123, the upper wall 121, and the side wall 125 are integrally formed by rolling, welding, or the like. In addition, a moving unit 130 of the movable platform 110, which will be described later, is attached to the rail 120 so as to be movable along the rail 120.

[0064] As shown in FIG. 4(a) and FIG. 4(b), a communication part 126 (e.g., a circular hole or the like) that communicates the inside and outside of the area defined by the lower wall 123, the upper wall 121, and the side wall 125 is provided. In this embodiment, the communication part 126 is provided in the lower wall 123. Here, the above-mentioned area forms a storage area in which a first wheel 131 and a second wheel 132 described later are stored so that they can run. The communication part 126 can drain rainwater and the like that has entered the area. The communication part 126 can be provided in an appropriate number (single or multiple) and size at various places (lower wall 123, upper wall 121, side wall 125, etc.) in the area as necessary.

[0065] As shown in FIG. 1, the movable platform 110 is disposed in a direction intersecting the pair of platform bodies 20, 20 (in this embodiment, a direction perpendicular to the pair). The movable platform 110 can be slid in the forward and backward direction of the truck 2 to block the gap behind the loading platform 4 of the truck 2. More specifically, the loading platform 10 forms a parking area S in which the truck 2 can be parked between the pair of platform bodies 20, 20. The loading platform 10 can move the truck 2 backward into the parking area S to make contact with the movable platform 110, and can move the movable platform 110 a distance L2 in the second direction X2 (second direction) which is the longitudinal direction of the platform body 20 as the truck 2 moves backward. Therefore, the loading platform 10 can make the movable platform 110 come into contact with the loading platform 4 of the truck 2 that has backwardly entered the parking area S from behind, preventing the formation of a gap behind the loading platform 4 that could cause a person to fall or trip. Furthermore, by projecting the width-direction movable platforms 50, 50 from the sides of the platform main body 20, 20 toward the bed 4 of the truck 2 and contacting it, it is possible to prevent the formation of gaps on the sides of the bed 4 that could cause a person to fall or trip. Therefore, the loading platform 10 can close gaps in three directions of the truck 2. Furthermore, the movable platform 110 functions as a deck for workers to carry out loading and unloading work behind the bed 4 of the truck 2. Note that the movable platform 110 can not only move by contact with the truck 2, but can also be manually or otherwise used by a worker to close the gap between the bed 4.

[0066] As shown in FIG. 4(a), the movable platform 110 has a substantially rectangular appearance in a plan view. The movable platform 110 has a second work platform 111 on the upper side that allows workers to come and go. The movable platform 110 has a fall prevention part 112 erected at least on the end side (in this embodiment, the rear end side) opposite to the cargo loading and unloading side of the second work platform 111. Here, the fall prevention part 112 can be configured, for example, as a fence or a wall so that the worker does not fall from the second work platform 111. In addition, the movable platform 110 is attached to the platform main body 20, 20 via a pair of moving units 130L, 130R described later.

[0067] As shown in FIG. 3, the movable table 110 has a second work table 111, a fall prevention part 112, a support table 116, and a connection part 118. The second work table 111 and the support table 116 are long and substantially rectangular plate-like members in a plan view. The movable table 110 is configured such that the support table 116 arranged below and the second work table 111 arranged above are connected by the connection part 118. The support table 116 is attached to the pedestal body 20, 20 via moving units 130L, 130R described later so as to be in a substantially horizontal position. The second work table 111 is supported by the support table 116 and the connection part 118 and is disposed at substantially the same height as the first work table 22.

[0068] The second work table 111 is raised upward by the connection portion 118 with respect to the support table 116, and a sliding allowable area 110a is formed as a gap between the second work table 111 and the support table 116. The sliding allowable area 110a is provided to allow the movement of the width direction movable table 50,50 within the area where the movable table 110 is located when the width direction movable table 50,50 and the movable table 110 are located so as to intersect in a plan view. That is, when the width direction movable table 50,50 is moved in the first direction X1 (see FIG. 2(b)) so as to protrude from the pedestal body 20,20, the width direction movable table 50,50 enters the area where the movable table 110 is located. In this state, the width direction movable table 50,50 is sandwiched between the second work table 111 and the support table 116 and is located in the sliding allowable area 110a. As a result, the loading platform 10 prevents the width-direction movable platforms 50,50 and the movable platform 110 from coming into contact with each other in both movement directions (the first direction X1 and the second direction X2). Therefore, the loading platform 10 allows the width-direction movable platforms 50,50 to move in the first direction X1 so as to protrude from the platform main bodies 20,20, while allowing the movable platform 110 to move freely in the second direction X2. This allows the gap between the truck 2 and the platform main bodies 20,20 to be blocked depending on the parking position of the truck 2.

[0069] 4(a) and 4(b), the pair of moving units 130L, 130R function as guides for moving the movable base 110 in the second direction X2. The moving unit 130L is disposed on the left side of the movable base 110 in the width direction, and the moving unit 130R is disposed on the right side of the movable base 110 in the width direction.

[0070] The moving unit 130L has a pair of first wheels 131L, 131L. The moving unit 130R has a pair of first wheels 131R, 131R, a pair of second wheels 132, 132 provided on the right side in the width direction of the movable base 110, a lock mechanism 140, etc.

[0071] The first wheels 131L, 131L, 131R, 131R are respectively axially fixed to first wheel axles 133L, 133L, 133R, 133R arranged along the width direction of the movable base 110. The first wheels 131L, 131L, 131R, 131R are arranged so as to protrude from the width direction of the movable base 110 toward the opening of the rails 120, 120. The first wheel axles 133L, 133L are supported by linear bushes 135, 135, 135, 135 as guide members provided on the back side of the support base 116 so as to be rotatable and movable in the width direction. As a result, the first wheels 131L, 131L roll on the lower wall 123 of the rail 120 together with the first wheel axles 133L, 133L. In addition, the first wheels 131L, 131L are restricted in movement in the first direction X1 within a predetermined range by the flange portion 122 of the upper wall 121, so that deviation from the rail 120 is suppressed.

[0072] In addition, the first wheel axles 133L, 133L are provided with a stopper at one end opposite to the wheel side, and are allowed to move in the width direction within a predetermined range via a pair of linear bushes 135, 135. This allows the interval between the first wheels 131L, 131L and the first wheels 131R, 131R to be adjusted within a predetermined range, thereby expanding the allowable range for the installation interval of the platform main bodies 20, 20 and improving the degree of freedom in installation of the loading platform 10.

[0073] On the other hand, the first wheel axles 133R, 133R arranged on the right side in the width direction of the movable base 110 are arranged along the width direction (first direction X1) of the movable base 110 and are rotatably supported by bearings 136, 136 provided on the back side of the support base 116. As a result, the first wheels 131R, 131R roll integrally with the first wheel axles 133R, 133R on the lower wall 123 of the rail 120. In addition, the movement of the first wheels 131R, 131R in the first direction X1 is restricted to a predetermined range by the flange portion 122 of the upper wall 121, so that deviation from the rail 120 is suppressed.

[0074] As shown in Fig. 4(a) and Fig. 4(c), the second wheels 132, 132 are arranged along the horizontal direction and are rotatably supported by the second wheel axles 134, 134. The second wheel axles 134, 134 are erected at the tip side of the support arms 137, 137 supported by the support base 116. Specifically, the support arms 137, 137 are supported on the rear side of the support base 116 and are provided so as to protrude from one end side (right side) of the support base 116 in the width direction toward the rail 120 side. The second wheel axles 134, 134 are erected along the vertical direction at the protruding ends of the support arms 137, 137.

[0075] In other words, the second wheel axles 134, 134 and the first wheel axles 133R, 133R are arranged to face in directions intersecting each other. In this first embodiment, the second wheel axles 134, 134 and the first wheel axles 133R, 133R are arranged to face in directions perpendicular to each other. Therefore, the first wheels 131R, 131R and the second wheels 132, 132 are arranged to face in directions intersecting (perpendicular to) each other. In addition, the movement of the second wheels 132, 132 in the first direction X1 is restricted by the flange portion 122 of the upper wall 121. As a result, the movement of the first wheels 131R, 131R and the second wheels 132, 132 in the width direction (first direction X1) relative to the rail 120 is restricted. As a result, deviation of the first wheels 131R, 131R and the second wheels 132, 132 from the rail 120 is suppressed, and the running stability of the first wheels 131R, 131R and the second wheels 132, 132 is improved. Note that, in this embodiment, the second wheels 132, 132 are provided only on the moving unit 130R side, but the second wheels 132, 132 can be provided on either one or both of the moving unit 130L and the moving unit 130R.

[0076] The lock mechanism 140 is provided on one (in this embodiment, the rear end side) of the first wheel axles 133R, 133R on one widthwise side (in this first embodiment, the right side) of the movable base 110. The lock mechanism 140 is configured to switch between an unlocked state that allows rotation of the first wheel axle 133R and a locked state that prevents rotation of the first wheel axle 133R.

[0077] 4(b), the lock mechanism 140 has a gear 141 and a stopping member 142. The gear 141 is provided between a pair of bearings 136, 136 that support the first wheel axle 133R, and is journaled to the first wheel axle 133R. Therefore, the gear 141 rotates in synchronization with the first wheel 131R.

[0078] The braking member 142 is supported by the movable base 110 and can move forward and backward between an advanced position where the braking member 142 meshes with the gear 141 and a released position where the braking member 142 is released from the meshing with the gear 141. The braking member 142 has an appropriate driving source (not shown) such as a cylinder or a motor, and is configured to be able to move forward and backward by the power of the driving source. The braking member 142 can be configured, for example, as an arc-shaped gear member having gear teeth that can mesh with the gear 141. The braking member 142 advances toward the gear 141 to mesh with the gear 141 and lock the first wheel axle 133R, and retreats from the gear 141 to release the meshing with the gear 141 and unlock the first wheel axle 133R.

[0079] Therefore, when the first wheel axle 133R is in a locked state, the movement of the movable platform 110 is stopped, and when the first wheel axle 133R is in an unlocked state, the movement of the movable platform 110 is permitted. As a result, the movable platform 110 can be brought into a state where it is close to the rear end side of the platform 4 by a distance L2 as shown in Figs. 5(a) and 5(b), and by bringing it into a locked state in this state by the locking mechanism 140, it is possible to maintain the close state to the platform 4. That is, the movable platform 110 can be brought into a stopped state with the gap between the platform 4 and the movable platform 110 closed. This can prevent the movable platform 110 from moving inadvertently, causing the worker to fall over or fall off the second work platform 111.

[0080] Here, the movable table 110 (second work table 111) is disposed at approximately the same height as the first work table 22, 22 when attached to the pedestal body 20, 20. This makes it possible to reduce the step between the first work table 22, 22 and the movable table 110. As a result, when a worker moves between the first work table 22, 22 and the movable table 110 to perform loading and unloading work, it is possible to prevent the worker from tripping over the step and falling.

[0081] The above is the configuration of the loading platform 10 according to the first embodiment of the present invention, and next, the effects of the loading platform 10 of the present invention will be described below. The loading platform 10 embodying the present invention, as exemplified in the above embodiment, has the following characteristic configurations (A) to (H), which enable the present invention to achieve unique effects.

[0082] (A) The loading platform 10 of the first embodiment described above is a loading platform 10 for a worker to perform loading and unloading work of loading and unloading cargo from a loading platform 4 on which cargo is loaded, and is equipped with a movable platform 110 that can approach and move away from the loading platform 4, at least one rail 120 arranged to extend along the loading platform 4, and at least one moving unit 130 having at least one wheel that allows the movable platform 110 to move along the rail 120. The movable platform 110 is arranged at a height that allows a worker to move from the loading platform 4 to and from the loading platform 4, and is arranged at a height that allows the worker to move toward and away .... The mobile unit 130 is characterized in that it has a work platform 111 (second work platform 111) formed along a width direction that intersects with each other, and the work platform 111 is provided with a fall prevention section 112 at least on the end side opposite the cargo loading / unloading side, and at least one of the mobile units 130 has at least one first wheel 131 and a second wheel 132 that can roll along the rail 120, and the first wheel 131 and the second wheel 132 are arranged so that their respective wheel axles (first wheel axle 133R and second wheel axle 134) face in directions that intersect with each other.

[0083] The loading platform 10 according to the embodiment described above has the above-mentioned characteristic configuration (A), and thus can achieve the following characteristic effects.

[0084] In the loading platform 10 of the present invention described above, the movable platform 110 is at a height that allows workers to travel from the platform 4, and the movable platform 110 can be moved close to the platform 4, thereby reducing the burden on workers to travel and reduce the burden on workers to travel during loading and unloading work. In addition, the loading platform 10 of the present invention can close the gap between the loading platform 10 and the platform 4 by moving the movable platform 110 toward the platform 4. This can prevent workers from falling from the loading platform 10 or the platform 4. In addition, in the loading platform 10 of the present invention, the work platform 111 (second work platform 111) of the movable platform 110 has a fall prevention part 112 at the end side opposite to the cargo loading and unloading side, so that the worker can be prevented from falling from the work platform 111. Here, the fall prevention part 112 can be configured, for example, by a fence or a wall, and is preferably configured to a height that can prevent the worker from falling. Furthermore, in the loading platform 10 of the present invention, the wheel axles of the first wheel 131 and the second wheel 132 that roll on the rail 120 are arranged to face in directions that intersect with each other, so that deviation of the first wheel 131 and the second wheel 132 from the rail 120 can be suppressed, and the movable platform 110 can be stably moved toward and away from the loading platform 4. Here, it is preferable that one of the wheel axles of the first wheel 131 and the second wheel 132 faces horizontally and the other faces vertically.

[0085] (B) The loading platform 10 of the first embodiment described above is characterized in that a pair of moving units 130 are provided on both sides in the width direction, at least one of the moving units 130 has at least one first wheel 131, a first wheel axle 133 of the first wheel 131 is arranged along the width direction of the movable table 110, the first wheel 131 is axially fixed to the first wheel axle 133 of the first wheel 131, and the first wheel axle 133 is rotatably supported by at least one guide member 135 supported by the movable table 110 and is supported so as to be movable within a predetermined range along the width direction.

[0086] The loading platform 10 according to the embodiment described above has the above-mentioned characteristic configuration (B), and thus can achieve the following characteristic effects.

[0087] The loading platform 10 of the present invention described above can move the first wheel axle 133 along the width direction (direction intersecting with the rail 120) of the movable platform 110 (second work platform 111). As a result, the loading platform 10 of the present invention can move the first wheel 131 in the width direction of the movable platform 110 together with the movement of the first wheel axle 133, so that the attachment adjustment of the movable platform 110 (first wheel 131) to the rail 120 can be easily performed. As a result, the loading platform 10 of the present invention can improve the degree of freedom in attachment of the movable platform 110 to the installation position of the rail 120.

[0088] (C) The loading platform 10 of the first embodiment described above is a loading platform 10 for workers to carry out loading and unloading work of loading and unloading cargo from a cargo platform 4 on which cargo is loaded, and includes a pair of first work platforms 22, 22 arranged at a height that allows workers to move from the cargo platform 4 and extending in the front-to-rear direction on either side of the cargo platform 4, a pair of platform bodies 20, 20 each having a platform for supporting the pair of first work platforms 22, 22, and a pair of rails 120 arranged to extend along the front-to-rear direction of the pair of platform bodies 20, 20. , 120, a movable platform 110 spanning a direction intersecting the pair of platform bodies 20, 20, and a pair of moving units 130 arranged on both sides of the width of the platform 4 on the movable platform 110 and equipped with at least one wheel allowing movement along the pair of rails 120, 120, wherein the movable platform 110 is characterized by comprising a second work platform 111 which enables workers to move back and forth, and a fall prevention section 112 erected at least on the end side of the second work platform 111 opposite the side where the cargo is loaded and unloaded.

[0089] The loading platform 10 according to the embodiment described above has the above-mentioned characteristic configuration (C), and thus can achieve the following characteristic effects.

[0090] The loading platform 10 of the present invention described above includes a pair of platform bodies 20 supporting a pair of first work platforms 22, 22 extending in the front-rear direction with the platform 4 between them. Therefore, even if the platform 4 is long in a transport vehicle such as a truck 2, workers can move between the pair of first work platforms 22, 22. In addition, the loading platform 10 of the present invention has a movable platform 110 stretched across the pair of platform bodies 20 in a direction intersecting the pair of platform bodies 20, and the movable platform 110 is movable along the width direction of the platform 4. In addition, the movable platform 110 is provided with a second work platform 111 and a fall prevention unit 112 that allow workers to move between the pair of first work platforms 22, 22 and the second work platform 111. Therefore, the loading platform 10 of the present invention can allow workers to move between the pair of first work platforms 22, 22 and the second work platform 111, thereby improving the efficiency of work. In addition, the second work platform 111 is provided with a fall prevention unit 112, so that workers can be prevented from falling in the direction of loading and unloading cargo. Here, the fall prevention section 112 can be configured, for example, as a fence or a wall, and is desirably configured to a height sufficient to prevent the worker from falling.

[0091] (D) In ​​the loading platform 10 of the first embodiment described above, at least one of the pair of moving units 130, 130 has at least one first wheel 131 and second wheel 132 that can roll along the rail 120, and the first wheel 131 and the second wheel 132 are arranged to face in directions that intersect with each other.

[0092] The loading platform 10 according to the embodiment described above has the above-mentioned characteristic configuration (D), and thus can achieve the following characteristic effects.

[0093] The loading platform 10 of the present invention described above can suppress deviation of the first wheel 131 and the second wheel 132 from the rail 120, and can stably move the movable platform 110 toward and away from the loading platform 4. Here, it is preferable that one of the first wheel axle 133 and the second wheel axle 134 of the first wheel 131 and the second wheel 132 faces horizontally and the other faces vertically, for example.

[0094] (E) The loading platform 10 of the first embodiment described above is characterized in that at least one of the pair of moving units 130, 130 has at least one first wheel 131, the first wheel 131 is journalled to a first wheel axle 133L arranged along the width direction of the movable platform 110, and the first wheel axle 133L is rotatably supported by at least one guide member 135 supported by the movable platform 110 and is supported so as to be movable within a predetermined range along the width direction of the movable platform 110.

[0095] The loading platform 10 according to the embodiment described above has the above-mentioned characteristic configuration (E), and thus can achieve the following characteristic effects.

[0096] The loading platform 10 of the present invention described above can move the first wheel axle 133 along the width direction (direction intersecting with the rail 120) of the movable platform 110 (second work platform 111). As a result, the loading platform 10 of the present invention can move the first wheel 131 in the width direction of the movable platform 110 together with the movement of the first wheel axle 133, so that the attachment adjustment of the movable platform 110 (first wheel 131) to the rail 120 can be easily performed. As a result, the loading platform 10 of the present invention can improve the degree of freedom in attachment of the movable platform 110 to the installation position of the rail 120.

[0097] (F) In the loading platform 10 of the first embodiment described above, the first wheel axle 133 is characterized in that it is provided with a locking mechanism 140 for switching between an unlocked state in which the first wheel axle 133R is permitted to rotate, and a locked state in which the rotation of the first wheel axle 133 is prevented.

[0098] The loading platform 10 according to the embodiment described above has the above-mentioned characteristic configuration (F), and thus can achieve the following characteristic effects.

[0099] The loading platform 10 of the present invention described above can switch the first wheel axle 133 between an unlocked state and a locked state. Here, since the first wheel 131 is pivoted to the first wheel axle 133, it can be switched between an unlocked state and a locked state in the same manner as the first wheel axle 133. This allows the loading platform 10 of the present invention to fix the movable platform 110 at a predetermined position relative to the platform 4. As a result, the loading platform 10 of the present invention can prevent the movable platform 110 from moving unexpectedly, and therefore can prevent workers from falling during loading and unloading work.

[0100] (G) In the loading platform 10 of the first embodiment described above, the first wheel axle 133 is provided with a locking mechanism 140 for switching between an unlocked state in which the rotation of the first wheel axle 133 is permitted and a locked state in which the rotation of the first wheel axle 133 is restricted. The locking mechanism 140 includes a gear 141 that is journalled to the first wheel axle 133 and rotates in synchronization with the first wheel 131, and a restricting member 142 that is supported by the movable base 110 and can move back and forth between an advanced position in which it engages with the gear 141 and a released position in which it is released from engagement with the gear. The restricting member 142 advances towards the gear 141, thereby engaging with the gear 141 and bringing the first wheel axle 133 into the locked state, and by retracting from the gear 141, it is released from engagement with the gear 141 and brings the first wheel axle 133 into the unlocked state.

[0101] The loading platform 10 according to the embodiment described above has the above-mentioned characteristic configuration (G), and thus can achieve the following characteristic effects.

[0102] The loading platform 10 of the present invention described above can reliably switch the first wheel axle 133 between an unlocked state and a locked state with a simple mechanism. Furthermore, the loading platform 10 of the present invention can fix the movable platform 110 at a predetermined position relative to the platform 4, so that the movable platform 110 can be prevented from moving unexpectedly. This makes it possible for the loading platform 10 of the present invention to prevent workers from falling over during loading and unloading work. Furthermore, the loading platform 10 of the present invention described above does not matter where the locking mechanism 140 is placed as long as it is on the first wheel axle 133 (including a position adjacent to the first wheel 131), so that the locking mechanism 140 can be placed by effectively utilizing the space in the movable platform 110.

[0103] (H) In the loading platform 10 of the first embodiment described above, the rail 120 is formed to extend along the loading platform 4 and comprises a lower wall 123 which forms the running surface for the first wheel 131, an upper wall 121 which is formed to extend along the loading platform 4 and arranged to face the lower wall 123 via the first wheel 131, and a side wall 125 which is formed along the lower wall 123 and the upper wall 121 and erected on the widthwise outer side of the lower wall 123 and the upper wall 121 to form the running surface for the second wheel 132, the upper wall 121 facing the side wall 125 at one end in the width direction and having a flange portion 122 which protrudes downward, and the lower wall 123 has a protruding wall 124 which protrudes downward at one end in the width direction opposite the side wall 125.

[0104] In the loading platform 10 of the present invention described above, the lower wall 123 forming the running surface of the first wheel 131 is provided with a protruding wall 124 protruding downward at one end side in the width direction opposite to the side wall 125, so that the strength of the lower wall 123 can be increased. As a result, the loading platform 10 of the present invention described above can suppress the bending and deformation of the rail 120, so that the movable platform 110 can be moved more stably. In addition, the loading platform 10 of the present invention described above has an upper wall 121 that faces the lower wall 123 via the first wheel 131, so that the first wheel 131 can be suppressed from moving (vibrating) in the vertical direction. Therefore, the loading platform 10 of the present invention described above can suppress the movable platform 110 from vibrating up and down when the movable platform 110 moves. In addition, in the loading platform 10 of the present invention described above, the upper wall 121 faces the side wall 125 at one end side in the width direction and has the flange portion 122 protruding downward, so that the first wheel 131 and the second wheel 132 can be prevented from moving inward in the width direction of the rail 120 (the upper wall 121 and the lower wall 123). As a result, the loading platform 10 of the present invention described above can prevent the first wheel 131 and the second wheel 132 from falling off the rail 120 when the movable platform 110 is traveling, so that the movable platform 110 can be moved stably.

[0105] (I) The loading and unloading platform 10 of the first embodiment described above is arranged at a height allowing workers to travel from the loading platform 4, and is equipped with a pair of first work platforms 22, 22 arranged to extend in the fore-and-aft direction on either side of the loading platform 4, and a pair of platform bodies 20, 20 equipped with platforms for supporting each of the pair of first work platforms 22, 22, and is characterized in that rails 120 are arranged on both widthwise sides of the platform bodies 20, 20 so as to extend along the fore-and-aft direction of the pair of platform bodies 20, 20, and protruding walls 124, 124 are engaged with at least a portion of the platform bodies 20, 20.

[0106] The loading platform 10 of the present invention described above allows the protruding wall 124 to engage with at least a portion of the platform body 20, thereby increasing the strength of the rail 120 and allowing the movable platform 110 to run more stably.

[0107] (J) The loading platform 10 of the first embodiment described above is characterized by having an area defined by a lower wall 123, an upper wall 121, and a side wall 125, and a communication portion 126 that connects the inside and outside of the area.

[0108] The loading platform 10 of the present invention described above can discharge rainwater, etc., to the outside of the area defined by the lower wall 123, the upper wall 121, and the side wall 125 of the rail 120 through the communication part 126. The area described above forms a storage area in which the first wheel 131 and the second wheel 132 are accommodated so as to be able to run, and the communication part 126 is preferably provided so as to communicate the inside and outside of the storage area. This prevents the first wheel 131 and the second wheel 132 from slipping, or conversely, prevents rainwater, etc. from becoming a resistance and reducing the running performance, even in rainy weather, for example. The communication part 126 can be provided in at least one of the lower wall 123, the upper wall 121, and the side wall 125, and one or more of them can be formed as necessary. The communication part 126 can be formed in an appropriate shape and size.

[0109] The above has described the configuration and effects of the loading platform 10 according to the first embodiment of the present invention. Next, a loading platform 200 according to a second embodiment of the present invention will be described in detail below.

[0110] Second Embodiment As shown in Fig. 7, the loading platform 200 according to the second embodiment supports the movable platform 210 in a so-called cantilever manner, in which the movable platform 210 is supported by the platform body 20 on one side. In addition, the loading platform 200 according to the second embodiment will be described as an example in which the platform body 20 is provided only on the right side of the platform 4. In the following description, the description of the same parts as in the first embodiment will be omitted. Also, please note that the same reference numerals as in the first embodiment are used for the same members and the like as in the first embodiment.

[0111] The loading platform 200 according to the second embodiment includes a platform body 20, an upper rail 230, a lower rail 240, and a movable platform 210. In addition to the above, the loading platform 200 also includes an upper moving unit 250, a lower moving unit 260, platform side wheels 201, and the like.

[0112] The gantry body 20 is configured by the same gantry as in the first embodiment, and therefore a description of the similar parts will be omitted. The gantry body 20 has an upper rail 230 and a lower rail 240 arranged thereon, instead of the rail 120 in the first embodiment. The gantry body 20 also has a plurality of gantry side wheels 201 on the lower end side. The plurality of gantry side wheels 201 are arranged at appropriate positions on the gantry body 20 so that the gantry body 20 does not fall over, etc.

[0113] The upper rail 230 is disposed so as to extend along the front-rear direction (longitudinal direction) on the upper side of the platform body 20 facing the loading platform 4. The upper rail 230 guides the movement of the upper moving unit 250, which will be described later. The upper rail 230 is formed to protrude toward the loading platform 4, and has a flange 231 facing downward on the protruding end side.

[0114] The lower rail 240 is disposed on the lower side of the gantry body 20 facing the loading platform 4 so as to extend along the front-rear direction (longitudinal direction). The lower rail 240 is adapted to guide the movement of a lower moving unit 260, which will be described later. The lower rail 240 is formed by a support 245 having a rectangular cross section protruding toward the loading platform 4 side. The lower rail 240 has a first lower rail 241 that guides a first lower wheel 261, which will be described later, and a second lower rail 242 that guides a second lower wheel 262, which will be described later.

[0115] The first lower rail 241 is laid on the upper surface side of the support pillar 245 so as to extend along the front-rear direction (longitudinal direction) of the gantry main body 20.

[0116] The second lower rail 242 corresponds to a side surface of the support pillar 245. That is, the second lower rail 242 is formed by the support pillar 245 extending along the front-rear direction (longitudinal direction) of the gantry main body 20.

[0117] The movable platform 210 includes a second work platform 211, an upper moving unit 250, a lower moving unit 260, and a fall prevention unit 112. The second work platform 211 is a long, substantially rectangular plate-like member in a plan view, although not shown. The movable platform 210 is provided with a support frame 213 extending downward at one end on the gantry body 20 side. The movable platform 210 is reinforced by a reinforcing member 214 that connects the second work platform 211 and the support frame 213 in an oblique direction. The movable platform 210 is supported by an upper moving unit 250 and a lower moving unit 260, which will be described later, so as to be movable along the front-rear direction of the gantry body 20. The second work platform 211 is disposed at substantially the same height as the first work platform 22, as the movable platform 210 is supported by the gantry body 20.

[0118] The upper moving unit 250 is provided above the movable base 210, and guides the movement of the movable base 210 along the front-rear direction (longitudinal direction) of the gantry body 20. The upper moving unit 250 has a support arm 252 and upper wheels 251.

[0119] One end of the support arm 252 is supported by the support frame 213, and the other end is provided so as to protrude toward the upper rail 230. An upper wheel axle 253 that rotatably supports the upper wheel 251 is provided upright in the vertical direction on the other end of the support arm 252.

[0120] The upper wheels 251 are rotatably supported on the upper wheel shafts 253 via bearings (not shown). That is, the upper wheels 251 are arranged along the horizontal direction. The upper wheels 251 are also arranged to be rollable along the upper rails 230, and engage with flanges 231 of the upper rails 230. Therefore, the upper wheels 251 are allowed to roll along the upper rails 230, while movement in the width direction of the platform 4 is restricted.

[0121] The lower moving unit 260 is provided below the movable base 210, and guides the movement of the movable base 210 along the front-rear direction (longitudinal direction) of the gantry body 20. The lower moving unit 260 has a first lower wheel 261 and a second lower wheel 262.

[0122] The first lower wheel 261 is rotatably supported via a bearing (not shown) on a first lower wheel shaft 263 journaled on the surface of the support frame 213 facing the platform body 20. The first lower wheel shaft 263 is supported along the width direction of the deck 4. Therefore, the first lower wheel 261 is arranged along the up-down direction. In addition, the cross section of the first lower wheel 261 is formed into a substantially H-shape in a plan view, and is rollably engaged with the first lower rail 241. Therefore, the movement of the first lower wheel 261 in the width direction of the deck 4 is restricted.

[0123] The second lower wheel 262 is rotatably supported by a protruding portion 265 provided on the lower end side of the support frame 213. Specifically, one end side of the protruding portion 265 is supported on the lower end side of the support frame 213, and the other end side is formed so as to protrude toward the second lower rail 242 side. On the other end side (tip side) of the protruding portion 265, a second lower wheel axle 264 is erected facing downward in the vertical direction. The second lower wheel 262 is rotatably supported by the second lower wheel axle 264 via a bearing (not shown). Therefore, the second lower wheel 262 is arranged along the horizontal direction. That is, the first lower wheel axle 263 and the second lower wheel axle 264 are arranged so as to face in a direction intersecting each other (in the second embodiment, in a direction perpendicular to each other), so that the first lower wheel 261 and the second lower wheel 262 are arranged so as to face in a direction intersecting each other.

[0124] Moreover, the second lower wheel 262 is able to roll along the second lower rail 242 by abutting against the second lower rail 242. Therefore, the second lower wheel 262 is pressed against the second lower rail 242 when a load is applied to the second work platform 211. On the other hand, since the upper wheel 251 is restricted from moving in the width direction of the platform 4, it is possible to keep the second work platform 211 horizontal even when the second work platform 211 is supported by a so-called cantilever.

[0125] The fall prevention section 112 is erected at least on the end side of the second work platform 211 (movable platform 210) opposite to the cargo loading / unloading side. This makes it possible to prevent a worker from falling from the opposite side of the loading platform 4 of the second work platform 211 when performing cargo handling work on the second work platform 211. Moreover, in this second embodiment, the fall prevention section 112 is also provided at one end of the second work platform 211 opposite to the platform body 20. This makes it possible to prevent a worker from falling from the side end of the second work platform 211.

[0126] The platform-side wheels 201 allow the platform body 20 to move at least along the width direction of the platform 4. This allows the platform body 20 to move toward and away from the platform 4 together with the movable platform 210 (second work platform 211).

[0127] Here, the movable platform 210 can move the second work platform 211 closer to the rear side of the platform 4 by sliding it along the upper rail 230 and the lower rail 240. This allows the movable platform 210 to close the gap between the platform 4 and the second work platform 211. On the other hand, the platform main body 20 can close the gap between the first work platform 22 and the platform 4 by moving closer to the platform 4 with the platform side wheels 201.

[0128] Although not shown in the drawings, by providing the first lower wheel axle 263 or the wheel axle of the gantry side wheel 201 with a lock mechanism 140 similar to that in the first embodiment, it is possible to lock the movement of the movable platform 210 or the movement of the gantry main body 20. In addition, for example, it is also possible to provide loading platforms 200, 200 on both sides in the width direction of the loading platform 4, and use the two movable platforms 210, 210 side by side in the width direction, or to use the respective movable platforms 210, 210 by connecting them together.

[0129] The above is the configuration of the loading platform 200 according to the second embodiment, and next, the operation and effect of the loading platform 200 according to the second embodiment will be described below. The loading platform 200 embodying the present invention, as exemplified in the above-mentioned embodiment, has the characteristic configurations shown in (I) to (M) below, which enable the present invention to achieve its unique effects.

[0130] (K) The loading / unloading platform 200 of the second embodiment described above is a loading / unloading platform 200 for workers to carry out loading / unloading work of loading / unloading cargo from a cargo platform 4 on which cargo is loaded, and includes a first work platform 22 arranged at a height that allows workers to travel from the cargo platform 4 and extending in the fore-and-aft direction of the cargo platform 4, a platform body 20 equipped with a platform for supporting the first work platform 22, an upper rail 230 arranged to extend along the fore-and-aft direction of the platform body 20 and arranged on the upper side of the platform body 20, and a supporting rail 240 arranged to extend along the fore-and-aft direction of the platform body 20 and arranged on the upper side of the platform body 20. The movable platform 210 is characterized in that it has a lower rail 240 arranged on the lower side, a movable platform 210 protruding from the platform main body 20 side toward the width direction of the loading platform 4, an upper moving unit 250 supported on the upper end side of the movable platform 210 and allowed to move along the upper rail 230, and a lower moving unit 260 supported on the lower end side of the movable platform 210 and allowed to move along the lower rail 240, and the movable platform 210 has a second work platform 211 which workers can move around on, and a fall prevention section 212 erected on at least the end side of the second work platform 211 opposite the side where the cargo is loaded and unloaded.

[0131] The loading platform 200 according to the embodiment described above has the above-mentioned characteristic configuration (H), and thus can achieve the following characteristic effects.

[0132] In the loading platform 200 of the present invention described above, the upper end side of the movable platform 210 is movably supported by the upper moving unit 250 and the lower end side of the movable platform 210 is movably supported by the lower moving unit 260 with respect to the platform main body 20 arranged along the front-rear direction of the platform 4. The movable platform 210 is arranged so as to protrude from the platform main body 20 side toward the width direction of the platform 4. That is, in the loading platform 200 of the present invention, the movable platform 210 is supported by a so-called cantilever along the width direction of the platform 4. Therefore, for example, even if there is space only on one side in the width direction of the platform 4, the first work platform 22 (platform main body 20) and the second work platform 211 (movable platform 210) can be arranged. In addition, even if the movable platform 210 is a cantilever, it is supported by both the upper end side and the lower end side with respect to the platform main body 20, so that the load-bearing capacity can be secured against the weight of the worker and the cargo. In addition, the second work platform 211 has a fall prevention section 212 erected on the end side opposite to the cargo loading / unloading side, which can prevent a worker from falling from the second work platform 211. Here, the fall prevention section 212 can be configured, for example, as a fence or a wall, and is desirably configured to a height sufficient to prevent a worker from falling.

[0133] (L) In the loading platform 200 of the second embodiment described above, the upper moving unit 250 has at least one upper wheel 251 capable of rolling along the upper rail 230, the lower moving unit 260 has at least one first lower wheel 261 and a second lower wheel 262 capable of rolling along the lower rail 240, the upper wheel 251 is restrained from moving in the width direction of the loading platform 4 by the upper rail 230, the first lower wheel axle 263 of the first lower wheel 261 is arranged along the width direction of the loading platform 4, and the second lower wheel axle 264 of the second lower wheel 262 are arranged in directions that intersect with each other, the first lower wheel 261 is restrained from moving in the width direction by the lower rail 240, and the second lower wheel 262 is arranged so as to abut against the lower rail 240 from the width direction.

[0134] The loading platform 200 according to the embodiment described above has the above-mentioned characteristic configuration (I), and thus can achieve the following characteristic effects.

[0135] In the loading platform 200 of the present invention described above, the upper wheels 251 are restrained from moving in the width direction of the platform 4 by the upper rail 230, so that even if the weight of a worker or cargo is placed on the second work platform 211, the upper wheels 251 can be prevented from departing from the upper rail 230. Furthermore, in the loading platform 200 of the present invention, the first lower wheels 261 are restrained from moving in the width direction of the platform 4 by the lower rail 240, and the second lower wheels 262 are arranged so as to abut against the lower rail 240 from the width direction. Therefore, the loading platform 200 of the present invention can receive the weight of a worker or cargo on the second work platform 211 by the lower rail 240 (platform main body 20). Therefore, the loading platform 200 of the present invention can ensure sufficient load resistance even when the movable platform 210 is supported by a cantilever.

[0136] (M) In the loading platform 10 of the second embodiment described above, the first lower wheel axle 133 is characterized in that it is provided with a locking mechanism 140 for switching between an unlocked state in which rotation of the first lower wheel axle 133 is permitted and a locked state in which rotation of the first lower wheel axle 133 is inhibited.

[0137] The loading platform 200 according to the embodiment described above has the above-mentioned characteristic configuration (J), and thus can achieve the following characteristic effects.

[0138] The loading platform 200 of the present invention described above can switch the first lower wheel axle 263 between an unlocked state and a locked state. Here, since the first lower wheel 261 is pivoted to the first lower wheel axle 263, it can be switched between an unlocked state and a locked state similarly to the first lower wheel axle 263. This allows the loading platform 200 of the present invention to fix the movable platform 210 at a predetermined position relative to the platform 4. As a result, the loading platform 200 of the present invention can prevent the movable platform 210 from moving unexpectedly, and therefore can prevent the worker from falling during loading and unloading work.

[0139] (N) In the loading platform 200 of the second embodiment described above, the locking mechanism 140 comprises a gear 141 that is pivoted to the first lower wheel axle 263 and rotates in synchronization with the first lower wheel 261, and a braking member 142 that is supported by the movable base 210 and can move back and forth between an advanced position in which it engages with the gear 141 and a released position in which it is released from engagement with the gear 141, and the braking member 142 advances toward the gear 141, thereby engaging with the gear 141 and bringing the first lower wheel axle 263 into the locked state, and by retracting from the gear 141, it is released from engagement with the gear 141 and brings the first lower wheel axle 263 into the unlocked state.

[0140] The loading platform 200 according to the embodiment described above has the above-mentioned characteristic configuration (K), and thus can achieve the following characteristic effects.

[0141] The loading platform 200 of the present invention described above can reliably switch the first lower wheel axle 263 between an unlocked state and a locked state with a simple mechanism. In addition, the loading platform 200 of the present invention can fix the movable platform 210 at a predetermined position relative to the platform 4, so that the movable platform 210 can be prevented from moving unexpectedly. As a result, the loading platform 200 of the present invention can prevent the worker from falling during loading and unloading work. In addition, the loading platform 200 of the present invention described above does not matter where the locking mechanism 140 is arranged as long as it is on the first lower wheel axle 263 (including a position adjacent to the first lower wheel 261), so that the locking mechanism 140 can be arranged by effectively utilizing the space in the movable platform 210.

[0142] (O) In the loading platform 200 of the second embodiment described above, the platform body 20 is characterized by including platform-side wheels 201 that allow the platform 4 to move at least along the width direction.

[0143] The loading platform 200 according to the embodiment described above has the above-mentioned characteristic configuration (L), and thus can achieve the following characteristic effects.

[0144] The loading platform 200 of the present invention described above can move the platform body 20 in the width direction of the platform 4 (the direction intersecting with the upper rail 230 and the lower rail 240). As a result, the loading platform 200 of the present invention can move the first work platform 22 (the platform body 20) and the second work platform 211 (the movable platform 210) integrally along the width direction of the platform 4 in accordance with the movement along the width direction of the platform 4. Therefore, the loading platform 200 of the present invention can easily adjust the positions of the platform body 20 and the movable platform 210 even if, for example, the stopping position of the truck 2 or the like is shifted.

[0145] The above is the configuration and effects of the loading platform 200 according to the second embodiment of the present invention. However, the loading platform 10, 200 according to the above-mentioned embodiment is merely one example of the loading platform 10, 200 of the present invention, and can be modified as appropriate without departing from the spirit of the present invention.

[0146] In this embodiment, the loading and unloading of cargo from the bed 4 of the truck 2 (transport vehicle 2) is illustrated, but the loading platform 10, 200 of the present invention can be applied to various types of beds 4, including stationary types, in addition to the truck 2. In addition, in this embodiment, the loading platform 10 provided with the bed body 20 having a bed frame is illustrated, but it can also be used for those that do not have the bed body 20 by configuring it as in the above-mentioned configuration (A). In addition, in this embodiment, the case where a pair of bed bodies 20, 20 are provided is illustrated, but the bed body 20 may be provided only on one side.

[0147] The shape and size of the movable platform 210 are not limited to the above-mentioned embodiment, and can be formed in various shapes and sizes. The arrangement, shape, length, etc. of the rail 120 can be variously adopted according to the form of the loading platform 4. The movable platform 110 can be set to various heights as long as it is arranged at a height that allows workers to move from the loading platform 4. In such a case, it is desirable to arrange the movable platform 110 so that there are fewer steps so that workers do not trip. The arrangement, shape, size, etc. of the fall prevention unit 112 can be variously arranged, shape, and size within a range that does not impede the loading and unloading work of the workers. The fall prevention unit 112 is not limited to a fence or a wall, and various types can be used. In addition, in this embodiment, the first wheel axle 133 (first lower wheel axle 263) and the second wheel axle 134 (second lower wheel axle 264) are arranged so as to be perpendicular to each other, but this is not limited thereto, and the first wheel axle 133 and the second wheel axle 134 can be arranged in various directions intersecting each other as long as they can roll along the rail 120. In such a case, it is desirable to arrange the first wheel axle 133 and the second wheel axle 134 in a direction that does not deviate from the rail 120. In addition, in this embodiment, the platform body 20 is exemplified as being equipped with the width-direction movable platform 50, but the loading platform 10 of the present invention may not be equipped with the width-direction movable platform 50.

[0148] In addition, in the present embodiment, the second wheels 132, 132 are provided only on the right moving unit 130R, but the second wheels 132, 132 are not limited to being provided on the right moving unit 130R. For example, the second wheels 132 may be provided on either one or both of the moving units 130L, 130R. In addition, the second wheels 132 may be provided in the required number as needed, and various numbers, such as a single wheel or multiple wheels, may be provided.

[0149] In addition, in this embodiment, the first wheel axle 133L is rotatably supported by the guide member 135 (linear bushing 135) supported by the movable base 110 and supported so as to be movable within a predetermined range along the width direction, but various means can be used as long as they allow the first wheel axle 133L to approach and move away from the platform 4. The guide member 135 is not limited to the linear bushing 135, and various types of members, such as a spline shaft, can be used as long as they allow rotation and sliding movement.

[0150] In principle, the locking mechanism 140 may be provided for any one of the wheel axles that roll along the rails in the same direction, but it may be provided for multiple wheels, taking into consideration the inertial force caused by the movement of the movable base 110. The gear 141 and the stopping member 142 in the locking mechanism 140 may be of various shapes as long as they are capable of meshing with each other to stop the wheel axle.

[0151] In the loading platform 200 according to the second embodiment, the platform body 20 is provided with platform-side wheels 201 that allow movement at least along the width direction of the platform 4, but the platform-side wheels 201 may allow movement along various directions as long as they can approach and move away from the platform 4, not just along the width direction. The platform-side wheels 201 can also be provided on the platform body 20 in the loading platform 10 of the first embodiment. In the second embodiment, the movable platform 210 is formed partway along the width direction of the platform 4, but it can be formed in various shapes and sizes that can be supported by the platform body 20.

[0152] The present invention is not limited to the configurations described in the above-mentioned embodiments, and appropriate design modifications and the like are possible within the scope of the technical idea of ​​the present invention. The components of the above-mentioned embodiments and modifications may be arbitrarily selected and combined. Any component of each embodiment or modification may be arbitrarily combined with any component described in the means for solving the problems, the mode for carrying out the invention, etc., or any component that embodies any component described in the means for solving the problems, the mode for carrying out the invention, etc. The present invention also intends to obtain rights to these in this application or in a divisional application based on this application. [Industrial Applicability]

[0153] INDUSTRIAL APPLICABILITY The loading / unloading platform of the present invention can be suitably used to prevent workers from falling and cargo from dropping during loading / unloading operations on various loading platforms, including those of transport vehicles such as trucks. [Explanation of symbols]

[0154] 2. Trucks (transport vehicles) 4 Cargo platform 10 Loading platform 20 Stand body 50 Width-direction movable platform 60a, 60b, 60c First guide mechanism 80a, 80b Power transmission mechanism 110 Movable platform 111 Workbench (second workbench) 112 Fall prevention unit 120 Rail 121 Upper wall 122 Flange 123 Lower wall 124 Projecting wall 125 Side wall 126 Communication section 130, 130L, 130R Mobile Unit 131 First wheel 132 Second wheel 133,133L,133R First wheel axle 134 Second wheel axle 135 Guide material (linear bushing) 140 Locking mechanism 141 Gear 142 Stopping member 200 Loading platform 210 Movable platform 211 Second workbench X1 First Direction (First Direction) X2 Second direction (second direction)

Claims

1. A loading and unloading platform for workers to load and unload cargo from a cargo bed, A movable platform that can approach and move away from the loading platform; At least one rail disposed to extend along the platform; at least one moving unit having at least one wheel allowing the moving platform to move along the rail; Equipped with The movable platform is disposed at a height that allows a worker to move from the platform to the other side, and includes a work platform formed along a width direction intersecting with a longitudinal direction of the rail, The work platform is provided with a fall prevention portion at least on the end side opposite to the loading and unloading side of the cargo, At least one of the moving units has at least one first wheel and a second wheel capable of rolling along the rail; A loading platform, characterized in that the first wheel and the second wheel are arranged so that their respective wheel axes are oriented in directions that intersect with each other.

2. A pair of the moving units is provided on both sides in the width direction, At least one of the mobile units has at least one first wheel; A first wheel shaft of the first wheel is disposed along the width direction of the movable base, The first wheel is journaled on a first wheel shaft of the first wheel, The loading platform according to claim 1, characterized in that the first wheel axle is rotatably supported by at least one guide member supported by the movable platform and is supported so as to be movable within a predetermined range along the width direction.

3. A loading and unloading platform for workers to load and unload cargo from a cargo bed, a pair of first work tables arranged at a height that allows workers to move from the loading platform to the loading platform and extending in a front-rear direction with the loading platform in between, and a pair of platform bodies including platforms for supporting the pair of first work tables, respectively; A pair of rails arranged to extend along the front-rear direction of the pair of rack bodies; A movable base is disposed across the pair of base bodies in a direction intersecting the pair of base bodies; A pair of moving units are arranged on both sides of the platform in the width direction of the movable platform and each of the moving units has at least one wheel that allows the moving units to move along the pair of rails; Equipped with The movable platform is A second work platform that allows the worker to move around; A fall prevention part erected on at least the end side of the second work platform opposite to the loading and unloading side of the cargo; A loading platform comprising:

4. At least one of the pair of moving units has at least one first wheel and a second wheel that are capable of rolling along the rail; The loading platform according to claim 3, wherein the first wheel and the second wheel are arranged to face in directions intersecting each other.

5. At least one of the pair of moving units has at least one first wheel; The first wheel is journaled to a first wheel shaft arranged along the width direction of the movable base, The loading platform according to claim 4, characterized in that the first wheel axle is rotatably supported by at least one guide member supported by the movable platform and is supported so as to be movable within a predetermined range along the width direction of the movable platform.

6. The loading platform according to claim 2 or 5, characterized in that the first axle is provided with a locking mechanism for switching between an unlocked state in which the first axle is permitted to rotate and a locked state in which the first axle is prevented from rotating.

7. The first wheel axle is provided with a lock mechanism for switching between an unlocked state in which rotation of the first wheel axle is permitted and a locked state in which rotation of the first wheel axle is restricted, The locking mechanism includes: A gear that is journaled to the first wheel shaft and rotates in synchronization with the first wheel; a stopping member supported by the movable base and movable between an advanced position where the stopping member meshes with the gear and a released position where the stopping member is released from the gear; Equipped with The restraining member is By advancing toward the gear, the first wheel axle is engaged with the gear to put the first wheel axle into the locked state, 6. The loading platform according to claim 2 or 5, wherein the first wheel axle is brought into the unlocked state by retracting from the gear, thereby releasing the engagement with the gear.

8. The rail is A lower wall that is formed to extend along the loading platform and forms a running surface for the first wheel; An upper wall is formed to extend along the loading platform and is arranged to face the lower wall via the first wheel; A side wall is formed along the lower wall and the upper wall, and is erected so as to form a running surface for the second wheel on the outer side of the lower wall and the upper wall in the width direction; Equipped with The upper wall has a flange portion that faces the side wall at one end in the width direction and protrudes downward, 5. The loading platform according to claim 1, 2 or 4, wherein the lower wall has a protruding wall that protrudes downward at one end in the width direction opposite to the side wall.

9. The vehicle is provided with a pair of first work tables arranged at a height that allows a worker to move between the loading platform and extending in the front-rear direction with the loading platform in between, and a pair of platform bodies each having a platform for supporting the pair of first work tables, The rails are arranged on both sides of the pair of rack bodies in a width direction so as to extend along a front-rear direction of the pair of rack bodies, 9. The loading platform according to claim 8, wherein the protruding wall is engaged with at least a portion of the platform body.

10. 9. The loading platform according to claim 8, further comprising a communication section that connects an area defined by the lower wall, the upper wall, and the side walls with the inside and outside of the area.

11. A loading and unloading platform for workers to load and unload cargo from a cargo bed, a first work platform disposed at a height allowing a worker to move from the loading platform to the loading platform and extending in a front-rear direction of the loading platform; and a platform body including a platform for supporting the first work platform; an upper rail disposed on an upper side of the gantry body and extending along a front-rear direction of the gantry body; A lower rail is disposed so as to extend along the front-rear direction of the gantry body and is disposed on the lower side of the gantry body; A movable platform protruding from the platform body side toward the width direction of the platform; an upper moving unit supported on an upper end side of the movable table and allowed to move along the upper rail; a lower moving unit supported on a lower end side of the movable table and allowed to move along the lower rail; Equipped with The movable platform is a loading and unloading platform characterized by having a second work platform through which the worker can move, and a fall prevention section erected at least on the end side of the second work platform opposite the side where the cargo is loaded and unloaded.

12. the upper moving unit has at least one upper wheel capable of rolling along the upper rail; the lower moving unit has at least one first lower wheel and a second lower wheel that are rollable along the lower rail; The upper wheels are restricted from moving in the width direction of the platform by the upper rail, A first lower wheel shaft of the first lower wheel is arranged along the width direction of the loading platform, The second lower wheel shafts of the second lower wheels are arranged in directions intersecting each other, The first lower wheel is restricted in movement in the width direction by the lower rail, The loading platform according to claim 11, wherein the second lower wheel is disposed so as to abut against the lower rail from the width direction.

13. The loading platform according to claim 12, characterized in that the first lower axle is provided with a locking mechanism for switching between an unlocked state in which the first lower axle is permitted to rotate and a locked state in which the first lower axle is inhibited from rotating.

14. The locking mechanism includes: A gear that is journaled to the first lower wheel shaft and rotates in synchronization with the first lower wheel; a stopping member supported by the movable base and movable between an advanced position where the stopping member meshes with the gear and a released position where the stopping member is released from the gear; Equipped with The restraining member is By advancing toward the gear, the first lower wheel axle is engaged with the gear to put the first lower wheel axle into the locked state, 14. The loading platform of claim 13, wherein the first lower axle is disengaged from the gear by retracting from the gear, thereby placing the first lower axle in the unlocked state.

15. 13. The loading platform according to claim 11, wherein the platform body is provided with platform-side wheels that allow movement of the platform at least along a width direction.

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