JP7736282B2 - Cart slings and carts - Google Patents

Description

The present invention relates to a trolley hoisting device used to hoist a trolley loaded with construction materials, etc., and a trolley equipped with this trolley hoisting device.

One known example of a cart for carrying and transporting materials or cargo is a transport cart that has a horizontal load support plate formed as a single plate of uniform thickness on which the load is placed, and four swivel wheels that are attached to the underside of the load support plate and rotate eccentrically (see Patent Document 1).

Japanese Patent Application Publication No. 7-291132

However, construction materials and other materials that have been loaded onto a cart and transported may need to be lifted and lowered to the location where they will actually be used, for example by a crane. In this case, with conventional carts such as those described in Patent Document 1, the construction materials loaded on the cart must be transferred to a lifting cage, which poses the problem of requiring a great deal of effort and time each time the construction materials are lifted or lowered.

The bogie in Patent Document 1 also has a load support plate formed as a single plate of uniform thickness, with each swivel wheel fixed directly to the underside of the load support plate with bolts, meaning that the load of materials and other items placed on the load support plate is supported solely by the load support plate. This creates the problem that the load capacity is limited to a small value, and also creates the problem that attempting to increase the load capacity results in the overall thickness of the load support plate becoming too thick, making the bogie itself very heavy.

The present invention therefore aims to provide a trolley hoisting device and a trolley that can reduce the effort and time required to raise and lower materials and cargo loaded onto the trolley for transport. Another aim of the present invention is to provide a structure that can improve the strength of the trolley through partial improvements.

In order to solve the above problems, the trolley hoisting device of the present invention may be assembled to a trolley and include a pair of span frame members arranged parallel to and spaced apart from each other to support the underside of the trolley's loading platform, connecting frame members that connect the span frame members, and hooks attached to both ends of each span frame member to which fasteners of a lifting machine for suspending and raising/lowering the trolley are attached.

The trolley hoisting device of the present invention may be configured so that the hook portion includes an engaging portion that engages with a load fastener for tightening and securing materials loaded on the loading platform.

The trolley hoisting device of the present invention may be configured so that the side edges of the span frame members abut against the side edges of a member or structure that forms an uneven surface on the underside of the loading platform.

The bogie of the present invention may be equipped with the bogie hoisting device described above.

The dolly according to the present invention may have a wheel receiving member disposed across the underside of the loading platform to which wheels are attached, the wheel receiving member having a rectangular plate-shaped base flange, a pair of opposing webs that protrude downward and are spaced apart from both side edges of the underside of the base flange along the longitudinal direction of the rectangle, and a pair of lower flanges that are connected to the lower ends of the webs and face the base flange.

The dolly according to the present invention may be configured such that a gap is provided between the frame body constituting part of the loading platform and the wheel receiving member, forming a gap for handling.

According to the present invention, materials can be transported using a cart, and then the cart can be lifted and lowered by a crane or other device using the hooking portion to the location where the materials will actually be used. This reduces the effort and time required to lift and lower materials that have been loaded onto a cart and transported.

In addition, according to the present invention, two span frame members are provided on the underside of the platform of the trolley to support the trolley. These two span frame members function as beams supporting both ends, improving the strength of the trolley as a whole.

According to the present invention, the engaging portion of the hook can be used to fasten and secure materials loaded on the cart with a cargo fastener to prevent the load from collapsing, ensuring safety when transporting or lifting materials loaded on the cart.

This invention makes it possible to prevent the trolley hoisting device from shifting or rattling relative to the trolley, improving the stability of the assembly of the trolley hoisting device to the trolley, and ultimately improving safety when raising and lowering materials, etc., using the trolley.

According to the present invention, the wheel receiving member, which has a web and a lower flange on each of the longitudinal edge portions of the base flange and is configured to have a larger section modulus than a simple flat plate, is placed across the underside of the platform of the bogie to support the bogie. This allows the wheel receiving member to function as a beam fixed at both ends, improving the strength of the bogie as a whole.

According to the present invention, when carrying the cart, the hand-holding gap can be inserted and used as a handle, making it easy to carry the cart even if the cart is large in size.

1 is a perspective view showing a carriage hoisting device according to an embodiment of the present invention; FIG. 2 is a front view of the carriage hoisting device shown in FIG. 1 . FIG. 2 is a side view of the carriage hoisting device shown in FIG. 1 . FIG. 2 is a plan view of the carriage hoisting device shown in FIG. 1 . FIG. 2 is a bottom view of the carriage hoisting device shown in FIG. 1 . FIG. 2 is a front view of the bogie to which the bogie hoisting device shown in FIG. 1 is attached. FIG. 2 is a side view of the bogie to which the bogie hoisting device shown in FIG. 1 is attached. FIG. 2 is a plan view of the bogie to which the bogie hoisting device shown in FIG. 1 is attached. 2 is a bottom view of the bogie with the bogie hoisting device shown in FIG. 1 assembled thereto. FIG. FIG. 2 is a perspective view showing a wheel receiving member of the bogie according to the embodiment. FIG. 11 is a front view of the wheel receiving member shown in FIG. 10 . FIG. 11 is a side view of the wheel receiving member shown in FIG. 10 . FIG. 11 is a plan view of the wheel receiving member shown in FIG. 10 . FIG. 11 is a bottom view of the wheel receiving member shown in FIG. 10 .

The present invention will be described below based on the illustrated embodiments. In the following description, the front-to-back, left-to-right, and up-to-down directions will be defined according to the arrow directions shown in each figure.

Figures 1 to 5 show a dolly hoisting device 1 according to an embodiment of the present invention, and Figures 6 to 9 show a dolly 10 to which the dolly hoisting device 1 according to this embodiment is attached. This dolly hoisting device 1 is attached to the dolly 10 and functions as a hoisting device for lifting and lowering the dolly 10, which is loaded with various materials, cargo, etc., using a crane or the like.

The trolley 10 has a frame body 11 composed of multiple frame members, a load-receiving plate 16 attached to the upper surface of the frame body 11, and wheels 17 attached to the underside of the frame body 11. In this embodiment, the loading platform of the trolley 10 is composed of the frame body 11 and the load-receiving plate 16. The trolley hoisting device 1 also has a trolley support part 2 composed of multiple frame members, a hook part 3 attached to the trolley support part 2, and an engagement part 4 attached to the trolley support part 2.

The frame body 11 of the bogie 10 has a frame frame 12 formed by combining and joining tubular (cylindrical, rod-shaped) frame members in a frame shape (frame-like), and a lattice frame 13 formed by combining and joining tubular (cylindrical, rod-shaped) frame members in a lattice shape inside the frame frame 12.

The frame 12 is made up of four connected frame members that form a rectangular frame (picture frame) in plan view. Specifically, the front frame member 12a and the rear frame member 12b are arranged along the left-right direction and spaced apart from each other in the front-to-rear direction, and a pair of left and right side frame members 12c are arranged along the front-to-rear direction and spaced apart from each other in the left-to-rear direction, respectively, and are disposed between the left ends and right ends of the front frame member 12a and the rear frame member 12b. These are assembled to form a rectangular frame (picture frame) in plan view.

Corner members 14 are disposed at each of the four corners of the frame 12, which is rectangular in plan view. The corner members 14 are used to connect and join the frame members that make up the frame 12, and have two connecting gaps 141 provided along the left-right direction and the front-to-back direction, and two insertion holes 142 provided along the up-down direction.

The connecting gaps 141 of the corner members 14 are formed as hollows into which the frame members that make up the frame 12 fit. The front frame member 12a and the side frame member 12c are inserted into each of the two connecting gaps 141 of the corner member 14, and the rear frame member 12b and the side frame member 12c are inserted into each of the two connecting gaps 141 of the corner member 14. The corner members 14 and the frame members that make up the frame 12 are fixed to each other with fastening members such as screws.

The insertion hole 142 of the corner member 14 is formed as a hollow section into which a pipe (such as a single pipe or a steel pipe; not shown) can be inserted and removed freely. A bolt is inserted horizontally into the lower end of the insertion hole 142, and a pipe inserted vertically from the upper opening of the insertion hole 142 is supported by abutting against the bolt. The pipe inserted and supported in the insertion hole 142 is used as an operating rod that functions like a handle and can be grasped when moving the cart 10.

The lattice frame 13 is made up of six frame members assembled inside the rectangular frame 12, forming a lattice structure in plan view. Specifically, four left-right frames 13a, each arranged along the left-right direction and spaced apart from each other in the front-to-rear direction, and two front-to-rear frames 13b, each arranged along the front-to-rear direction and spaced apart from each other in the left-to-right direction, intersect at right angles to each other and form a lattice structure in plan view.

The left-right frame 13a and the front-rear frame 13b of the lattice frame 13 are joined by welding or fixed to each other with fastening members such as screws, for example. The lattice frame 13 is also joined to the frame 12 by welding or fixed to the frame with fastening members such as screws, for example.

The material of each frame member (tube material, cylinder material, rod material) that makes up the frame body 11 is not limited to a specific type of material; an appropriate material is selected based on, for example, strength and weight. Specific examples of materials that can be used for each frame member that makes up the frame body 11 include aluminum alloys. Furthermore, each frame member that makes up the frame body 11 can be made of, for example, a member shaped like a square pipe.

The load-receiving plate 16 of the cart 10 is used to place materials, luggage, etc., and is formed in a plate shape and attached to the upper surface of the frame body 11. The load-receiving plate 16 is fixed to the frame body 11 with fastening members such as screws.

The load receiving plate 16 has a front portion 16a and a rear portion 16b that span between a pair of left and right side frame members 12c, and a central portion 16c between the front portion 16a and the rear portion 16b, and is formed roughly in an L shape in a plan view. The top surface of the frame body 11, which is rectangular in plan view, is not covered by the load receiving plate 16 in the portions near the front end and the rear end, nor are the left and right sides of the central portion 16c of the load receiving plate 16 between the front portion 16a and the rear portion 16b covered by the load receiving plate 16.

The wheels 17 of the bogie 10 are attached to the underside of the frame body 11 via wheel receiving members 18.

Figures 10 to 14 show the wheel receiving member 18 according to this embodiment. The wheel receiving member 18 is a member that is interposed between the frame body 11 and the wheel 17 to attach the wheel 17 to the frame body 11, and has a base flange 18a, a pair of webs 18b that connect to the base flange 18a, and a pair of lower flanges 18c that connect to each of the webs 18b.

The wheel receiving members 18 are arranged along the left-right direction (i.e., the left-right direction is the longitudinal direction) and are attached to the underside of the frame body 11 at a position near the front end (reference symbol 18A), a position near the rear end (reference symbol 18B), and a midpoint in the fore-and-aft direction (reference symbol 18C). The wheel receiving members 18 are joined to the frame body 11 by, for example, welding or fixed with fastening members such as screws.

The base flange 18a of the wheel receiving member 18 is a rectangular plate, and the wheel receiving member 18 is attached to the frame body 11 with the longitudinal direction of this rectangle aligned with the left-right direction. A pair of webs 18b are formed on the underside of the base flange 18a, near each end of both side edges along the longitudinal direction (in other words, the span direction across the underside of the platform of the trolley 10), protruding/extending downward while being spaced apart. That is, the pair of webs 18b are formed on the underside of the base flange 18a, parallel to and facing each other along the longitudinal direction of the base flange 18a. A pair of lower flanges 18c are formed at the lower end of each of the pair of webs 18b, facing the base flange 18a across the web 18b. Each of the pair of lower flanges 18c is formed to protrude/extend from the web 18b on both sides in a direction perpendicular to the longitudinal direction of the web 18b.

The wheel receiving member 18 has a base flange 18a, a web 18b, and a lower flange 18c, so it has a larger section modulus and therefore greater strength than a simple flat plate material with only the base flange 18a.

The front wheel receiving member 18A, which is attached to the underside of the frame body 11 near the front end, is disposed between the front frame member 12a and the foremost left-right frame 13a that constitutes the lattice frame 13. The rear wheel receiving member 18B, which is attached to the underside of the frame body 11 near the rear end, is disposed between the rear frame member 12b and the rearmost left-right frame 13a that constitutes the lattice frame 13. The middle wheel receiving member 18C, which is attached to the underside of the frame body 11 at a midpoint in the fore-and-aft direction, is disposed between the two middle left-and-right frames 13a that constitute the lattice frame 13. In the example shown in the figure, the front wheel receiving member 18A and the rear wheel receiving member 18B are arranged as a single member spanning the pair of left and right side frame members 12c, while the intermediate wheel receiving members 18C are arranged as separate members near each of the pair of left and right side frame members 12c (i.e., the intermediate wheel receiving members 18C are arranged as a pair).

Of the upper surface of the frame body 11, which is rectangular in plan view, the portion near the front end that is not blocked by the load receiving plate 16 is blocked by a front wheel receiving member 18A at a position one step lower than the top surface of the load receiving plate 16, while the portion near the rear end is blocked by a rear wheel receiving member 18B at a position one step lower than the top surface of the load receiving plate 16. Furthermore, the left and right side portions of the central portion 16c of the load receiving plate 16 are blocked by intermediate wheel receiving members 18C at positions one step lower than the top surface of the load receiving plate 16.

In the example shown in the figure, the front and rear ends of the upper surface of the frame body 11 and the left and right sides of the central portion 16c of the load receiving plate 16 are not blocked by the load receiving plate 16, and multiple gaps are created between the frame body 11 and the wheel receiving member 18, and these gaps can be used as handling gaps 19. The handling gaps 19 are used as handles by inserting a hand when carrying the trolley 10. By providing the handling gaps 19, the trolley 10 can be easily carried even if the frame body 11 is large, for example.

The material of the wheel receiving member 18 is not limited to a specific type of material, and an appropriate material can be selected taking into consideration factors such as strength and weight. The wheel receiving member 18 may be formed by combining multiple parts, but it is preferable to form it as a single piece, particularly from the perspective of ensuring good strength. The wheel receiving member 18 is formed, for example, by die-casting an aluminum alloy.

Wheel receiving members 18A, 18B are attached respectively to the front and rear ends of the frame body 11. Free-wheeling wheels (casters) 17A that can rotate around a vertical axis are attached to the left and right ends of the underside of the base flange 18a of each of these wheel receiving members 18A, 18B. Furthermore, fixed wheels 17B that are fixed in the fore-aft direction are attached to the underside of the base flange 18a of each of a pair of left and right wheel receiving members 18C, which are attached at intermediate positions in the fore-aft direction of the frame body 11. The wheels 17 are fixed to the wheel receiving members 18, for example, via a top plate (mounting base) using fastening members such as screws. In the example shown in the figure, the wheels 17 are attached to the underside of the base flange 18a of the wheel receiving member 18 through through-holes 18d provided in the base flange 18a of the wheel receiving member 18, with the top plate (mounting base) sandwiched between a pair of webs 18b and a pair of lower flanges 18c.

In this embodiment, as described above, swivel wheels 17A are attached to each of the four corners of the underside of the frame body 11, which is rectangular in plan view, and fixed wheels 17B are attached to each of the left and right intermediate portions in the fore-and-aft direction. It is optional whether swivel wheels (casters) or fixed wheels are attached as wheels 17 at each position. It is also possible not to attach wheel receiving members 18 or wheels 17 to intermediate positions in the fore-and-aft direction of the frame body 11.

Of the upper surface of the frame body 11, which is rectangular in plan view, the portions near the front and rear ends that are not covered by the load receiving plate 16, as well as the left and right sides of the central portion 16c of the load receiving plate 16, are covered by wheel receiving members 18 at positions lower than the top surface of the load receiving plate 16, creating recesses. When stacking the carts 10, the wheels 17 enter the recesses that open on the top surface of the load receiving plate 16 and have the top surface of the wheel receiving members 18 as their base, preventing the stacked carts 10 from collapsing.

The trolley hoisting device 1 in this embodiment comprises a pair of span frame members 21 arranged parallel and spaced apart from each other to support the platform of the trolley 10 from below, a pair of connecting frame members 22 arranged parallel and spaced apart from each other to connect the span frame members 21, and hook portions 3 attached to both ends of each span frame member 21 to which fasteners of a lifting machine for suspending and raising/lowering the trolley 10 are attached. In this embodiment, the platform of the trolley 10 is composed of a frame body 11 and a load-receiving plate 16.

The carriage support portion 2 of the carriage sling 1 is arranged on the underside of the frame body 11 of the carriage 10 to support the carriage 10, and is made up of square pipe materials assembled and joined together to form a frame (picture frame).

The bogie support unit 2 is made up of four connected square pipes that form a rectangular frame (frame-like) in plan view. Specifically, a pair of front and rear span frame members 21, each arranged along the longitudinal direction (i.e., the left-right direction) of the front and rear frame members 12a and 12b of the bogie 10 and spaced apart from each other in the front-to-rear direction, and a pair of left and right connecting frame members 22, each arranged along the longitudinal direction (i.e., the front-to-rear direction) of the side frame members 12c of the bogie 10 and spaced apart from each other in the left-to-right direction, connecting the left and right ends of the pair of front and rear span frame members 21, are assembled to form a rectangular frame (frame) in plan view. The span frame members 21 and connecting frame members 22 of the bogie support unit 2 are joined by welding or fastened to each other with fastening members such as screws, for example.

The connecting frame members 22 function to fix the distance between the pair of front and rear span frame members 21, and it is not essential that two be provided. In other words, it is preferable to provide two connecting frame members 22 in order to ensure good strength as the bogie support part 2 and because they can be positioned without being affected by the structure on the underside of the loading platform of the bogie 10 by providing one on each of the left and right side edges of the bogie 10, but it is also possible to provide only one connecting frame member 22 in the center on the left and right.

The material of each frame member (square pipe material) that makes up the bogie support unit 2 is not limited to a specific type of material, and an appropriate material is selected as appropriate, taking into consideration factors such as strength and weight. For example, steel square pipe material is used as each frame member that makes up the bogie support unit 2.

The spacing between the pair of front and rear span frame members 21 of the bogie support section 2 is preferably adjusted so that the span frame members 21 abut against the wheel receiving member 18. Specifically, the spacing between the span frame members 21 is preferably adjusted so that the front surface (side edge) of the front span frame member 21 of the pair abuts against the rear surface of the front wheel receiving member 18A (specifically, the rear surface and side edge of the base flange 18a and lower flange 18c), and the rear surface (side edge) of the rear span frame member 21 of the pair abuts against the front surface of the rear wheel receiving member 18B (specifically, the front surface and side edge of the base flange 18a and lower flange 18c). This prevents the bogie hoisting device 1 from shifting or rattling in the fore-and-aft direction relative to the bogie 10, improving the stability of the assembly of the bogie hoisting device 1 to the bogie 10 and ultimately improving safety when raising and lowering materials, etc., using the bogie 10. The member against which the side edge of the span frame member 21 abuts does not have to be the wheel receiving member 18, but can be any member or structure that is fixed and arranged to form an uneven surface on the underside of the platform of the trolley 10 (specifically, the frame body 11). Furthermore, the rear surface (side edge) of the front span frame member 21 may abut against the front surface of a member or structure sandwiched in the fore-and-aft direction between the pair of front and rear span frame members 21, and the front surface (side edge) of the rear span frame member 21 may abut against the rear surface of the member or structure.

The hook portion 3 of the trolley hoisting device 1 is used to hook a fastener of a lifting machine (e.g., a hook of a crane) when lifting and lowering the trolley 10 supported by the trolley support portion 2, and is also used to engage a cargo fastening device (e.g., lashing belt, cargo securing belt) that fastens and secures materials and cargo loaded on the cargo receiving plate 16 of the trolley 10 to prevent the cargo from collapsing. It is attached to the trolley support portion 2.

A total of four hooks 3 are provided, connected to both the left and right ends of each of the pair of span frame members 21 at the front and rear of the bogie support part 2.

The hook 3 is used to hang a hook from a crane or the like, and is made by bending a rod with a circular cross section into an upside-down U-shape with the upper portion being a curved portion 31 and the lower portion being a straight portion 32 when viewed from the side. It is attached to the span frame member 21 with the left or right end of the span frame member 21 sandwiched between the lower end opening. The hook 3 is joined to the span frame member 21 by welding, for example, or fixed with a fastening member such as a screw.

The gap 33 inside the curved portion 31 of the hook portion 3 is used as a space for passing a hook, such as a crane hook, when attaching it to the curved portion 31.

The engaging portion 4 is used to engage a cargo fastener that fastens and secures materials, etc., on the cargo receiving plate 16. It is formed by bending a rod with a circular cross section into a U-shape with a curved portion. One end of a pair of opposing straight portions of the U-shape is attached to the underside of the connecting frame member 22, and the other end is attached to the top side of the connecting frame member 22, with the curved portion of the U-shape facing outward in the left-right direction, at a position adjacent to or near the hooking portion 3.

The gap 41 inside the curved portion of the engaging portion 4 is used as a space for passing a cargo fastener to fasten and secure materials on the cargo receiving plate 16.

The length of the bridge frame member 21 of the trolley support section 2 along the left-right direction and the spacing between the pair of opposing left and right hook portions 3 are preferably adjusted to dimensions that allow the hook portions 3 to abut against the side frame members 12c of the frame 12. Specifically, the length of the bridge frame member 21 and the spacing between the hook portions 3 are preferably adjusted so that the surface of each of the pair of left and right hook portions 3 that faces the opposing hook portion 3 in the left-right direction abuts against the side surface (side edge) of the side frame member 12c. This prevents left-right shifting/rattle of the trolley hoisting device 1 relative to the trolley 10, improving the stability of the assembly of the trolley hoisting device 1 to the trolley 10 and ultimately improving safety when raising and lowering materials, etc., using the trolley 10.

Note that while it is preferable for the bogie hoisting device 1 to be detachably fastened to the bogie 10 using bolts or the like via connecting hardware (not shown) disposed between the frame body 11 and the spanning frame member 21, it is also possible for it to be unfastened. In the example shown in the figure, a bolt hole 211 is provided in the spanning frame member 21, and the bogie hoisting device 1 can be connected and fixed to the frame body 11 by a bolt 212 passing through this bolt hole 211.

With the dolly hoisting device 1 and dolly 10 of this embodiment, materials, etc. can be transported using the dolly 10, and then the hooking portion 3 can be used to lift and lower the dolly 10 with a crane or other device to the location where the materials, etc. will actually be used, reducing the effort and time required to lift and lower materials, etc., that have been loaded onto the dolly 10. Furthermore, the hooking portion 3 (particularly the engaging portion 4) can be used to fasten and secure materials, etc., on the load-receiving plate 16 with a load-tightening device to prevent the load from collapsing, ensuring safety when transporting and lifting materials, etc., loaded onto the dolly 10.

The bogie hoisting device 1 and bogie 10 according to this embodiment also have two span frame members 21 that span the underside of the frame body 11 of the bogie 10 in the left-right direction and support the frame body 11. These two span frame members 21 function as beams supporting both ends, improving the strength of the bogie 10 as a whole.

Furthermore, the bogie 10 according to this embodiment has three wheel receiving members 18 that span the underside of the frame body 11 of the bogie 10 in the left-right direction and support the frame body 11. Furthermore, since the wheel receiving members 18 have a larger section modulus than simple flat plate material, these three wheel receiving members 18 function as beams fixed at both ends, making it possible to improve the strength of the bogie 10 as a whole.

While the above describes an embodiment of the present invention, the specific configuration is not limited to the above embodiment, and design changes that do not deviate from the gist of the present invention are still included within the scope of the present invention. For example, the above embodiment describes an example in which the bogie hoisting device 1 of the present invention is applied to the bogie 10 shown in the figures. However, the specific configuration of a bogie to which the bogie hoisting device 1 of the present invention can be applied is not limited to the bogie 10 in the above embodiment. Any bogie may have a specific configuration as long as it has a structure equivalent to the frame body 11 and load receiving plate 16 that constitute the loading platform of the bogie 10 shown in the figures, and the bogie support portion 2 of the bogie hoisting device 1 can be assembled to the underside of the frame body 11 or load receiving plate 16. For example, while the bogie 10 in the above embodiment has six wheels, it may also have a four-wheel bogie (in which case, the wheel receiving members 18 may be two). Furthermore, a bogie that has a structure equivalent to the load receiving plate 16 in the above embodiment but does not have a structure equivalent to the frame body 11 (i.e., a bogie whose loading platform is composed only of the load receiving plate) may also be used. Even if the structure does not have a frame body 11, the necessary strength can be ensured by the bogie hoisting device 1 and wheel support member 18, depending on the application of the bogie.

In addition, in the above embodiment, the longitudinal direction of the load receiving plate 16 of the trolley 10 (which is the direction in which the trolley is normally expected to travel) is set to the front-to-rear direction, and the bridge frame members 21 are arranged along the left-to-right direction (i.e., arranged along a direction perpendicular to the longitudinal direction of the load receiving plate 16). However, the longitudinal direction of the load receiving plate 16 of the trolley 10 may also be set to the left-to-right direction, and the bridge frame members 21 may also be arranged along the left-to-right direction (i.e., arranged along the longitudinal direction of the load receiving plate 16).

In addition, while in the above embodiment the trolley hoisting device 1 has the engagement portion 4, the trolley hoisting device 1 may not have the engagement portion 4. In this case, too, the hook portion 3 can be used to lift and lower the entire trolley 10 using a crane or the like. In this case, it is possible to fasten and secure the materials on the load receiving plate 16 by, for example, wrapping a cargo securing device (e.g., a lashing belt or a cargo securing belt) around from the underside of the frame body 11 and circling it around to unite the trolley 10 and the materials on the load receiving plate 16.

DESCRIPTION OF SYMBOLS 1 Bogie hoisting device 2 Bogie support portion 21 Span frame member 211 Bolt hole 212 Bolt 22 Connecting frame member 3 Hook portion 31 Curved portion 32 Straight portion 33 Gap 4 Engagement portion 41 Gap 10 Bogie 11 Frame body 12 Frame 12a Front frame member 12b Rear frame member 12c Side frame member 13 Lattice frame 13a Left-right frame 13b Front-rear frame 14 Corner member 141 Connecting gap portion 142 Insertion hole portion 16 Load receiving plate 16a Front portion 16b Rear portion 16c Central portion 17 Wheel 17A Free wheel 17B Fixed wheel 18 Wheel receiving member 18A Front wheel receiving member 18B Rear wheel receiving member 18C Intermediate wheel receiving member 18a Base flange 18b Web 18c Lower flange 18d Through hole 19 Gap for handholding

Claims (3)

The trolley is formed in an upside-down U-shape with an upper curved portion and a lower straight portion, and is arranged on the side of the platform of the trolley, the curved portion protruding above the platform and a lower end opening protruding below the platform, and has a hook portion to be hooked into a gap inside the curved portion for a fastener of a lifting machine for lifting and lowering the trolley,
The hook portion has an engaging portion that engages with a load fastener for fastening and fixing materials loaded on the loading platform.
A hoisting device for a trolley characterized by the above. The lower end opening sandwiches an end of a span frame member that supports the loading platform from the underside.
2. The bogie hoisting device according to claim 1. A carriage hoisting device according to claim 1,
A bogie characterized by: