JP5890450B2 - Combined stepladder cart - Google Patents

Description

  The present invention relates to a carriage that can also be used as a stepladder used when working at a high place.

  2. Description of the Related Art Conventionally, there has been proposed a cart that can be used as a stepladder when working at a high place while being used as a cart in a factory or a construction site (for example, Patent Documents 1 and 2). reference).

  The carts that can also be used as these conventional stepladders are basically connected to each end of the two members so that they can be folded together, and when used as a cart, the two members are folded and used together. When used as a stepladder, the two members are used in a substantially "<" shape.

Japanese Utility Model Publication No. 58-41900 Utility Model Registration No. 3027023

  However, in such a conventional stepladder combined carriage, when used as a stepladder, as described above, the two members are developed in a substantially "<" shape and are placed on the ground or the like. When viewed from the side, the apex portion having a substantially “<” shape is arranged above. Therefore, the worker (user) works by placing his / her foot on the apex portion of the generally “<” shape (substantially triangular) located above, Since the apex portion of the approximate “ku” shape (substantially triangular shape) is extremely narrow, it is impossible to open both feet or move the leg on the apex portion, and the complicated apex cannot be performed. There was also a problem that there was a risk of falling off the foot from the part.

  Further, in the conventional stepladder combined carriage as described above, when the two members are used as a carriage, the two members are folded and folded to each other, so that the two members are folded. There is a problem that the dimension in the direction orthogonal to the loading platform plane is increased, the carrying is inconvenient, and a large space is required for storage.

  The present invention has been made paying attention to such problems of the prior art. When used as a stepladder, the present invention opens both feet on the upper part of the stepladder, moves the foot, and places a tool at the foot. It is an object of the present invention to provide a stepladder carriage that can easily perform advanced and complicated work and that does not cause the operator to step off and fall from the upper part of the stepladder. It is another object of the present invention to provide a stepladder trolley that can improve convenience in carrying and minimize the storage space during storage even when used as a trolley.

  The stepladder combined carriage according to the present invention for solving the above-mentioned problems is a substantially rectangular plane for loading a load, and each of the respective sides on the side or back side of each end of the load parallel to each other. A pair of first legs arranged along the end (the direction in which the edge extends), wherein one end of each first leg is one end of each end of the cargo bed And about 90 to 130 degrees with respect to the side surface or the back surface side of the cargo bed and the back surface side of the cargo bed with one end side of each of the cargo bed as the rotation center. When the first leg portion is disposed on the side surface side or the back surface side of the cargo bed, the first leg portion is connected to the position bent at an angle within a range. A plurality of wheels protruding in a direction opposite to the reverse side of the loading platform, a pair of first legs, A pair of second legs disposed along the respective end portions (directions in which the edges extend) on the side surface side or the back surface side of each of the parallel end portions of the loading platform, each of the second legs One end of each of the parts is an end opposite to the end connected to the first leg in each end of the cargo bed, and the opposite end in each end of the cargo bed Rotating between the position facing the side surface or the back surface side of the loading platform and the position where it is bent at an angle in the range of about 90 to 130 degrees with respect to the back surface side of the loading platform with the section side as the center of rotation. It is connected movably, and between each said 2nd leg part, when each said 2nd leg part is bend | folded at the said angle with respect to the back surface side of the said loading platform, an operator puts a leg. And a pair of second legs that are interposed between the stepped legs.

  In the stepladder combined carriage according to the present invention, each of the first leg portion and the second leg portion may be provided directly on the “side surface” of the cargo bed or another member (other leg portion or the like). It is preferable that each of the two is opposed to the “end face of the side surface” of the cargo bed and arranged in a plane direction of the cargo bed.

  Further, in the stepladder combined carriage according to the present invention, the first leg and the second leg are respectively provided with a predetermined distance in a direction away from the cargo bed from an end of each leg that is away from the cargo bed. Auxiliary legs that can only protrude may be provided.

  In the present invention, as described above, the first leg portion with wheels and the second leg portion with stepping platform are respectively provided at the opposite ends of the respective edges on the long side or the short side of the loading platform. A range of about 90 to 130 degrees (more desirably about 100 to 120 degrees or about 100 to 110 degrees) with respect to the side surface side (end surface side) or the back surface side of the cargo bed and capable of approaching the back surface of the cargo bed. It is connected so that it can be bent at an inner angle. Therefore, according to the present invention, when used as a carriage, the user places a load on the front surface side of the cargo bed by causing the first and second leg portions to face each other on the side surface side or the back surface side of the cargo bed. The loading platform can be moved by the wheels of the first leg. On the other hand, when used as a stepladder, the first and second leg portions are expanded at the angle with respect to the back side of the cargo bed, and the first and second leg portions are used as legs and the front surface side of the cargo bed is directed upward. By arranging, the user can put a foot on the step of the second leg portion, climb to the surface side of the loading platform above, and perform a work at a high place on the step. In this case, since the surface side of the loading platform is formed in a flat shape with a certain area, the user can open both feet or move the feet on the loading platform and place the tool on the loading platform. Can be easily performed, so that sophisticated and complicated work can be easily performed, and there is no fear that the user will fall off the foot from the loading platform.

  Further, in the present invention, when the first leg portion and the second leg portion are configured so as to be close to and opposed to the “side end surface” of the cargo bed, and are arranged along the plane direction of the cargo bed. When used as a cart, the first and second legs are not directly overlapped with each other in the direction perpendicular to the plane of the cargo bed, either directly on the “side surface” of the cargo bed or via other legs. Therefore, the total thickness including the loading platform and the first and second legs is set to the largest thickness of any of the loading platform, the first leg, and the second leg. (The total thickness including the loading platform and the first and second leg portions is a dimension obtained by adding three of the loading platform, the thickness of the first leg portion, and the thickness of the second leg portion. Not.) Therefore, when configured in this way, the overall thickness dimension when used as a carriage should be sufficiently small while using three members of the loading platform, the first leg and the second leg. Therefore, when used as a carriage, it is possible to improve the convenience of carrying and minimize the storage space during storage.

  In the present invention, the first leg portion and the second leg portion are configured to face the “end surface of the side surface” directly or via another leg portion, and are orthogonal to the plane of the cargo bed. When configured as a stepladder when configured so as not to overlap each other in the direction to be carried out (aligned along the plane direction of the loading platform), the ends on the loading platform side of the first and second legs are Since it is located outside the plane of the loading platform and the first and second legs support the loading platform from the outside of the loading platform, the loading platform as a scaffold is more stably supported.

  Furthermore, in this invention, it is the direction which leaves | separates from the said loading platform from the edge part (end part on the side away from the said loading platform) of the said 1st leg part developed by the said angle with respect to the back surface of the said loading platform. When it is configured to be provided with auxiliary leg portions that can protrude by a predetermined distance, when used as a stepladder, it becomes possible to arrange a loading platform that serves as a scaffold during work at a high place at a higher position.

It is a figure which shows the state which uses the stepladder trolley | bogie which concerns on Embodiment 1 of this invention as a trolley | bogie, (a) is sectional drawing seen from the bottom face, (b) is the side view. (A) And (b) is sectional drawing seen from the bottom face which shows the middle in the state which uses it as a cart of FIG. (A) is a side view showing a state in the middle of shifting from the state used as a carriage in FIG. 1 to the state used as a stepladder in the first embodiment, and (b) shows a state where the first embodiment is used as a stepladder. FIG. It is a perspective view which shows a state when using this Embodiment 1 as a trolley | bogie. It is a perspective view which shows a state when using this Embodiment 1 as a trolley | bogie. It is a perspective view which shows a state when using this Embodiment 1 as a trolley | bogie. It is a perspective view which shows a state when using this Embodiment 1 as a trolley | bogie. It is a perspective view which shows a state when using this Embodiment 1 as a trolley | bogie. In this Embodiment 1, it is a perspective view which shows the operation | movement in the middle of changing to the state used as a stepladder from the state used as a trolley | bogie of FIG. In this Embodiment 1, it is a perspective view which shows the operation | movement in the middle of changing to the state used as a stepladder from the state used as a trolley | bogie of FIG. In this Embodiment 1, it is a perspective view which shows the operation | movement in the middle of changing to the state used as a stepladder from the state used as a trolley | bogie of FIG. In this Embodiment 1, it is a perspective view which shows the operation | movement in the middle of changing to the state used as a stepladder from the state used as a trolley | bogie of FIG. In this Embodiment 1, it is a perspective view which shows the operation | movement in the middle of changing to the state used as a stepladder from the state used as a trolley | bogie of FIG. In this Embodiment 1, the perspective view which shows the operation | movement which transfers to the state which rotates and expand | deploys a 2nd leg part with respect to a loading platform and uses it as a stepladder from the state which the 1st leg part developed and fixed with respect to the loading platform. It is. In this Embodiment 1, the perspective view which shows the operation | movement which transfers to the state which rotates and expand | deploys a 2nd leg part with respect to a loading platform and uses it as a stepladder from the state which the 1st leg part developed and fixed with respect to the loading platform. It is. In this Embodiment 1, the perspective view which shows the operation | movement which transfers to the state which rotates and expand | deploys a 2nd leg part with respect to a loading platform and uses it as a stepladder from the state which the 1st leg part developed and fixed with respect to the loading platform. It is. In this Embodiment 1, the perspective view which shows the operation | movement which transfers to the state which rotates and expand | deploys a 2nd leg part with respect to a loading platform and uses it as a stepladder from the state which the 1st leg part developed and fixed with respect to the loading platform. It is. In this Embodiment 1, it is a perspective view which shows the state which the 2nd leg part rotates, expand | deploys, is fixed with respect to a loading platform, and is used as a stepladder. It is a side view for demonstrating the stepladder combined carriage which concerns on Embodiment 2 of this invention.

[First Embodiment]
Hereinafter, the structure when using Embodiment 1 of this invention as a trolley | bogie is demonstrated with reference to FIG.1 and FIG.3-7. 1A and 1B are views showing a state in which the stepladder combined carriage according to the first embodiment is used as a carriage. FIG. 1A is a bottom view thereof, and FIG. 1B is a side view thereof. Moreover, FIGS. 3-7 is a perspective view which shows a state when using this Embodiment 1 as a trolley | bogie.

  In FIG. 1, reference numeral 1 denotes a loading platform for loading a load, which is a relatively thin (for example, about several mm to 2 cm thick) metal flat plate having a substantially rectangular plane, and 2a is an upper edge of the loading platform 1 in the figure. The support part which consists of a square-shaped metal square pipe fixed along the end surface of the side part (long side edge part of the loading platform 1) (in the left-right direction in the drawing), 2b is the lower side of the loading platform 1 shown in the drawing The support portions 3a and 3b made of a square metal pipe having a square cross-section fixed along the side face of the edge (long side edge of the loading platform 1) (in the horizontal direction in the figure) Arranged on the side of the support portions 2a and 2b away from the load carrier 1 so as to be along the longitudinal direction of the support portions 2a and 2b (the direction along the long side edge of the load carrier 1). It is the 1st leg part which consists of a metal square pipe of the cross-sectional square shape made. As shown in FIG. 1, the first leg portions 3a and 3b are opposed to the end surfaces of the side surface of the cargo bed 1 through the support portions 2a and 2b and second leg portions 11a and 11b described later, respectively. Is arranged.

  The first leg portions 3a and 3b are connected to the right end portions 2aa and 2ba of the support portions 2a and 2b at the right end portions 3aa and 3ba in the drawing by hook-like connecting rods 5, respectively. The first leg portions 3a and 3b can be rotated with respect to the support portions 2a and 2b and the loading platform 1 with the hook-shaped connecting rod 5 as a rotation center by the hook-shaped connecting rod 5. Bendable). The hook-like connecting rod 5 has first holes 3a, 3b formed by the square pipe, second legs 11a, 11b (to be described later), and holes formed in the support portions 2a, 2b (for example, 2A (a), FIG. 8 and FIG. 9), the first leg portions 3a and 3b are pivotally connected to the support portions 2a and 2b. Yes.

  In FIG. 1, reference numeral 6 denotes a square metal pipe having a square cross section which is fixed (in the vertical direction in the drawing) along the right edge of the loading platform 1 and houses the hook-like connecting rod 5. 7 indicates that the hook-like connecting rod 5 is not moved in the direction (arrow A direction in the figure) in which the hook-like connecting rod 5 in the square pipe 6 moves out of the support portion 2b. 6 is a spring that urges the square pipe 6 in the internal direction (in the direction of arrow B in the figure) (see also reference numeral 7 in FIG. 7).

  In FIG. 1, 8a and 8b are interposed between the first leg portions 3a and 3b and the support portions 2a and 2b, respectively, and the hook-like connecting rod 5 is inserted through an insertion hole. It is an interposition part which consists of a metal square cylinder formed so that insertion and accommodation are possible. In FIG. 1, 9 is a wheel attached to each of the four first leg portions 3a and 3b, and 10 is a connecting plate for connecting the first leg portions 3a and 3b so as to bridge each other. (For example, it is composed of a square metal pipe having a square cross section).

  Moreover, in FIG. 1, 11a, 11b is such that each longitudinal direction is along each longitudinal direction of the said support parts 2a and 2b (direction along the long side edge part of the said loading platform 1) (in the horizontal direction shown in the figure), It is a second leg portion made of a metal square pipe having a square cross section, which is disposed between each of the first leg portions 3a, 3b and each of the support portions 2a, 2b. As shown in FIG. 1, the second leg portions 11 a and 11 b are disposed so as to face the end surface of the side surface of the cargo bed 1 through the support portions 2 a and 2 b, respectively. The second leg portions 11a and 11b are connected to the illustrated left end portions 2ab and 2bb of the support portions 2a and 2b at the illustrated left end portions 1aa and 11ba by hook-like connecting rods 13, respectively. The second leg portions 11a and 11b can be rotated with respect to the support portions 2a and 2b and the loading platform 1 with the hook-shaped connecting rod 13 as the center of rotation by the hook-shaped connecting rod 13 (possibly close to each other and Bendable). The hook-like connecting rod 13 is inserted into the second leg portions 11a and 11b and the support portions 2a and 2b formed by the square pipes (reference numerals 11bb and 2bd in FIG. 2A (b)). The second leg portions 11a and 11b are rotatably connected to the support portions 2a and 2b.

  In FIG. 1, reference numeral 14 denotes a metal square pipe having a square cross section that is fixed along the left edge of the loading platform 1 (in the vertical direction in the figure) and that houses the bowl-shaped connecting rod 13. In order to prevent the hook-like connecting rod 13 in the square pipe 14 from moving in the direction in which the hook-like connecting rod 13 comes out of the support portion 2b (the arrow C direction in the figure), the hook-like connecting rod 13 is moved in the internal direction of the square pipe 14 (the arrow in the figure). The spring 16 for urging in the D direction) connects the pair of second legs 11a and 11b so as to bridge each other, and the pair of the pair of second legs 11a and 11b protrudes from the back side of the cargo bed 1. This is a step fixed to the second legs 11a and 11b.

  In the state shown in FIG. 1, that is, the state where the first leg portions 3 a and 3 b are used as a carriage, the first leg portions 3 a and 3 b are connected to the support portions 2 a and 2 b and the loading platform 1 by the hook-like connecting rod 5 and the connecting plate 10. It is being fixed to the said support part 2b so that it may not rotate with respect to it. Similarly, the second leg portions 11a and 11b are also attached to the support portion 2b so that the second leg portions 11a and 11b are not rotated with respect to the support portions 2a and 2b and the loading platform 1 by the hook-shaped connecting rod 13 and the step platform 16. It is fixed.

  Moreover, in FIG.1 (b), 17 is a handle when using this Embodiment 1 as a trolley | bogie. The handle 17 is connected to the end portion on the right side of the loading platform 1 by a connecting portion 17 a so as to be able to rotate so as to approach and separate from the surface side of the loading platform 1. At the time of storage, the handle 17 is rotated and fixed in the direction of the surface of the loading platform 1.

  Next, in the first embodiment, FIG. 2A (a) and (b), FIG. 2B (a), and FIG. 2B show operations during the transition from the state used as the carriage of FIG. 1 to the state used as a stepladder. Explanation will be made with reference to FIGS. 2A (a) and 2 (b) are cross-sectional views seen from the bottom surface showing the operation during the transition from the state of FIG. 1 to the state of use as a stepladder in the first embodiment, and FIG. Side views showing the operation, FIGS. 8 to 12 are perspective views showing the intermediate operation.

  In the first embodiment, when shifting from the state used as a cart in FIG. 1 to the state used as a stepladder, first, as shown in FIG. 2A (a) and FIGS. Pull in direction A. Then, as shown in FIG. 2A (a), each insertion hole such as the tip end portion 5a (the insertion holes 3ac, 3bc of the first leg portions 3a, 3b) which is bent in the shape of the hook of the hook-like connecting rod 5 is formed. Thus, the first leg portions 3a and 3b, the second leg portions 11a and 11b, and the tip portion 5a inserted into the support portions 2a and 2b) are connected to the support portions 2a and 2b and the second leg portion 11a. 11b and the support portions 2a and 2b, the first leg portions 3a and 3b can be rotated around the hook-shaped connecting rod 5 with respect to the support portions 2a and 2b and the loading platform 1.

  Therefore, in this state, as shown in FIG. 11, the first leg portions 3a and 3b are rotated in the direction of the arrow E (the direction away from the loading platform 1) with the hook-shaped connecting rod 5 as the rotation center. In the first embodiment, the rotation is performed by a known stopper mechanism (not shown) such that the first leg portions 3a and 3b are rotated to an angle of, for example, about 105 degrees with respect to the back surface side of the loading platform 1. When stopped.

  In this way, the first legs 3a and 3b are rotated after the first legs 3a and 3b are rotated and expanded to an angle of, for example, about 105 degrees with respect to the back side of the loading platform 1. When stopped, next, as shown in FIG. 12, the front end portion 5a of the hook-shaped connecting rod 5 is used to fix the first leg portions 3a, 3b to the loading platform 1 in the state of the angle. The first leg portion is inserted into the insertion hole 1ba (see FIG. 1B, FIG. 2B (a), FIG. 8B, FIG. 8-11, etc.) of the fixed piece 1b fixed to the loading platform 1. 3a and 3b are fixed in a state where they are at an angle of about 105 degrees with respect to the back side of the loading platform 1. 2A (b), FIG. 2B (a), and FIG. 12, the first leg portions 3a and 3b are deployed and fixed at an angle of about 105 degrees with respect to the back surface side of the loading platform 1 in this way. It shows the state.

  Next, in the first embodiment, from the state where the first leg portions 3a and 3b are deployed and fixed to the loading platform 1 (see FIGS. 2A (b), 2B (a) and 12), Refer to FIG. 2A (b), FIG. 2B (b) and FIGS. 13 to 17 for the operation of shifting the two legs 11a and 11b to a state where they can be used as a stepladder by rotating, unfolding and fixing with respect to the loading platform 1. To explain. FIGS. 13 to 16 are perspective views showing the transition operation of the first embodiment, and FIG. 17 is a perspective view showing a state where it can be used as a stepladder of the first embodiment.

  In the first embodiment, the first leg portions 3a, 3b are used as a stepladder from the state where the first leg portions 3a, 3b are deployed and fixed to the loading platform 1 (see FIGS. 2A (b), 2B (a) and 12). When shifting to the state, first, as shown in FIG. 2A (b) and FIG. 13, the hook-shaped connecting rod 13 is pulled in the direction of arrow C. Then, as shown in FIG. 2A (b), the tip end portion 13a of the hook-like connecting rod 13 bent in a hook shape (through the insertion holes 11ab, 11bb of the second leg portions 11a, 11b, etc.) The distal end portion 13a) inserted into the two leg portions 11a, 11b and the support portions 2a, 2b through the respective insertion holes is pulled out from the second leg portions 11a, 11b and the support portions 2a, 2b, and The two leg portions 11a and 11b can be rotated around the hook-shaped connecting rod 13 with respect to the support portions 2a and 2b and the loading platform 1.

  Therefore, in this state, as shown in FIGS. 14 to 16, the second leg portions 11a and 11b are rotated in the direction indicated by the arrow F with the hook-shaped connecting rod 13 as the rotation center. In the first embodiment, the rotation is performed by a known stopper mechanism (not shown) when the second leg portions 11a and 11b are rotated to an angle of, for example, about 105 degrees with respect to the back side of the loading platform 1. Stopped.

  In this way, the rotation of the second leg portions 11a and 11b is stopped after the second leg portions 11a and 11b are rotated and expanded to an angle of about 105 degrees with respect to the back side of the loading platform 1. Then, in order to fix the second legs 11a and 11b to the loading platform 1 in the state of the angle, as shown in FIGS. By inserting the leading end portion 13a of the fixing piece 1c into the insertion hole 1ca (see FIGS. 1B, 2B, 2A, and 13-16) of the fixing piece 1c, The second leg portions 11a and 11b are fixed in a state where they are at an angle of about 105 degrees with respect to the back surface side of the loading platform 1. 2B (b) and FIG. 17 show a state in which the second leg portions 11a and 11b are developed and fixed at an angle of about 105 degrees with respect to the back side of the loading platform 1 in this way. is there.

  Further, in this case, the hook-shaped connecting rod 13 is moved in the direction of arrow D (the square pipe 14 by the spring 13 (see FIG. 1A, etc.) in the square pipe 14 so as not to come out of the support portion 2b. (Inward direction). Through the above operation, the first embodiment is in a state of being used as a stepladder (see FIG. 2B (b) and FIG. 17).

  As described above, in the first embodiment, the first leg portions 3a, 3b with the wheels 9 and the second leg portions with the step platform 16 are provided at the opposite ends of the respective long side edges of the loading platform 1. 11a and 11b are connected so as to be able to approach each other on the side surface side (end surface side) of the cargo bed 1 and bendable at an angle within a range of about 105 degrees with respect to the back surface of the cargo bed 1, respectively. Therefore, when using the first embodiment as a carriage, the user arranges the first leg portions 3a, 3b and the second leg portions 11a, 11b so as to face the side surface side of the loading platform 1, A load can be placed on the surface side of the loading platform 1 and the loading platform 1 can be moved by the wheels 9 of the first leg portions 3a and 3b. On the other hand, when the user uses the first embodiment as a stepladder, the first leg portions 3a, 3b and the second leg portions 11a, 11b are developed from the side surface side of the loading platform 1 to be fixed at the angle, By arranging the one leg portions 3a, 3b and the second leg portions 11a, 11b as the leg portions on the ground or the like, and arranging the surface side of the loading platform 1 as the work table, the space between the second leg portions 11a, 11b. It is possible to place a foot on the step 16 and climb to the surface side of the loading platform 1 (work platform) above the platform to perform work at a high place. In this case, since the surface side of the loading platform 1 (working platform) is formed in a stable flat shape having a certain area, the user can open both feet or move the feet on the loading platform 1, It is possible to easily place and work on the loading platform, so that complicated and advanced work can be easily performed, and there is no possibility of dropping the foot from the loading platform 1 and dropping it.

  In the first embodiment, as shown in FIG. 1A and the like, the first leg portions 3a and 3b and the second leg portions 11a and 11b are closely opposed to the side surface side of the loading platform 1. Sometimes, it is configured to line up along the plane direction of the loading platform 1 (so as not to overlap each other in the direction orthogonal to the plane of the loading platform 1). Therefore, when used as a carriage, the first leg portions 3a and 3b and the second leg portions 11a and 11b are opposed to the side surface of the loading platform 1 so as to overlap each other in the plane direction of the loading platform 1. And the total thickness including the first leg portions 3a, 3b and the second leg portions 11a, 11b, the thickness of the loading platform 1, the first leg portions 3a, 3b, and the second leg portions 11a, 11b. The total thickness including the loading platform 1, the first leg portions 3a and 3b, and the second leg portions 11a and 11b is the thickness of the loading platform 1 and the first leg portions 3a and 3b. And the thickness of the second leg portions 11a and 11b are not added to each other). Therefore, when comprised in this way, while using three members, the loading platform 1, 1st leg part 3a, 3b, and 2nd leg part 11a, 11b, the whole thickness dimension at the time of using it as a trolley | bogie. Can be made sufficiently small, the convenience of carrying as a cart can be improved, and the storage space for storing as a cart can be minimized.

  Further, in the first embodiment, the first leg portions 3a, 3b and the second leg portions 11a, 11b are configured to be able to face the outside of the side surface of the cargo bed 1, so when used as a stepladder, The ends of the first leg portions 3 and 3b and the second leg portions 11a and 11b on the loading platform 1 side are located outside the plane of the loading platform 1, and the first leg portions 3 and 3b and the second leg portions 11a and 11b. Supports the loading platform 1 from the outside of the loading platform 1, so that the loading platform 1 as a scaffold is supported more stably.

  In the first embodiment, as shown in FIG. 2B (b), when the first embodiment is used as a stepladder, a handle 17 is set up on one side of the loading platform 1, and the handle 17 is safe. Since it functions as a fence, the worker can work on the loading platform 1 more safely.

[Second Embodiment]
Next, a stepladder trolley according to Embodiment 2 of the present invention will be described with reference to FIG. Since the basic configuration of the second embodiment is the same as that of the first embodiment, only different parts will be described below.

  In the second embodiment, as shown in FIG. 18, auxiliary leg portions 21 (for example, metal square pipes, etc.) are respectively provided in the first leg portions 3 a and 3 b and the second leg portions 11 a and 11 b. Contained. Each of these auxiliary leg portions 21 is provided at the lower end portion of each leg portion 3a, 3b, 11a, 11b, for example, and protrudes in the inner direction of each leg portion 3a, 3b, 11a, 11b of the rod-shaped member. By adjusting the screw-type rod-like member 22a (of the type in which the length is adjusted with a screw protruding from the outside of each leg 3a, 3b, 11a, 11b), the whole or part of each auxiliary leg 21 is The leg portions 3a, 3b, 11a, and 11b can be left accommodated or protruded from the lower end portions of the leg portions 3a, 3b, 11a, and 11b by a predetermined length. That is, each auxiliary leg 21 is formed with insertion holes 22b through which the threaded rod-shaped member 22a can be inserted at a plurality of predetermined positions, and the threaded rod-shaped member 22a is inserted into the insertion hole 22b. Thereby, each auxiliary leg 21 is fixed to each leg 3a, 3b, 11a, 11b in a state protruding by a predetermined length. In the second embodiment, each of the auxiliary leg portions 21 has a predetermined length from the illustrated lower end portions of the leg portions 3a, 3b, 11a, and 11b by a known configuration such as the screw-type rod-like member 22a and the insertion hole 22b. It can be fixed with only protruding.

  As described above, according to the second embodiment, the first leg portions 3a and 3b and the second leg portions 11a and 11b, which are deployed and fixed at a predetermined angle with respect to the back surface side of the loading platform 1, are supported from the lower end portions. Since the leg portion 21 protrudes by a predetermined distance and can be fixed in that state, when the second embodiment is used as a stepladder, the loading platform 1 that serves as a scaffold during work at a high place can be arranged at a higher position. .

  The first and second embodiments of the present invention have been described above. However, the present invention is not limited to those described as the first and second embodiments, and various modifications and changes can be made. For example, in each of the first and second embodiments, the first leg portions 3a and 3b are hooked connecting rods that are located at the ends of the “edges on the long sides” of the loading platform 1 with respect to the loading platform 1. 5 (see FIG. 1 and the like) is pivotally connected to the back side of the loading platform 1 so as to be foldable and bendable. The second legs 11a and 11b are connected to the loading platform 1 with respect to the loading platform 1. The hook-shaped connecting rod 13 (see FIG. 1 etc.) at the end of “the edge on each long side” (the end opposite to the end to which the first legs 3a, 3b are connected) The center of rotation is foldable and foldable with respect to the back surface side of the loading platform 1. In the present invention, the first leg portion is connected to the loading platform with each “short” of the loading platform. Foldable with respect to the back side of the cargo bed with the connecting portion at the end of the `` side edge '' as the center of rotation, and The second leg portion is connected to the load platform so that the end of the “edge on each short side” of the load platform (on the side opposite to the end to which the first leg is connected) is connected to the load platform. You may make it connect so that it can fold and bend with respect to the back surface side of the said loading platform centering on the connection part which exists in an edge part.

  Moreover, in the said Embodiment 2, the auxiliary leg part 21 protrudes only the predetermined distance from the lower end part of 1st leg part 3a, 3b and 2nd leg part 11a, 11b developed by the predetermined angle with respect to the back surface side of the loading platform 1. In this state, a known length adjusting and fixing mechanism including the screw-type rod-like member 22a and the insertion hole 22b is adopted as a configuration for fixing in this state. However, the present invention is not limited to this and other known fixing mechanisms are used. Of course, it can be adopted.

DESCRIPTION OF SYMBOLS 1 Loading platform 1b Fixing piece 1ba, 1ca, 2bc, 2bd, 3bc, 11bb, 22b Insertion hole 1c Fixing piece 2a, 2b Support part 3a, 3b First leg part 5, 13 Bowl-like connecting rod 5a, 13a Tip 6, 14 Square pipe 7, 15 Spring 9 Wheel 10 Connecting plate 11a, 11b Second leg 16 Step 17 Handle 17a Connection 21 Auxiliary leg 22a Screw-type rod-shaped member

Claims (3)

A substantially rectangular loading platform for loading luggage,
A pair of first leg portions arranged along the respective end portions on the side surface side or the back surface side of each end portion parallel to each other of the cargo bed, and one end portion of each of the first leg portions, One end portion of each end portion of the loading platform and one end portion side of each end portion of the loading platform as a rotation center, and a position facing the side surface or the back surface side of the loading platform and the loading platform Are connected to a position bent at an angle within a range of about 90 to 130 degrees with respect to the back surface side of each of the first leg portions, and the first leg portions are connected to the first leg portions. A pair of first legs provided with a plurality of wheels protruding in a direction opposite to the back side of the cargo bed when arranged on the side or back side of the cargo bed;
A pair of second legs disposed along the respective end portions on the side surface side or the back surface side of each of the parallel end portions of the cargo bed, wherein one end portion of each of the second leg portions is , With the end on the opposite side to the end connected to the first leg in each end of the loading platform and the end on the opposite side in each end of the loading platform as the center of rotation It is connected so as to be rotatable between a position facing the side surface or the back surface side of the cargo bed and a position bent at an angle within a range of about 90 to 130 degrees with respect to the back surface side of the cargo bed. And between each said 2nd leg part, when each said 2nd leg part is bend | folded at the said angle with respect to the back surface side of the said loading platform, the step stand which an operator can step on is interposed. A pair of second legs,
A stepladder trolley characterized by the above.   Each of the first leg and the second leg can be opposed to the “side face of the cargo bed” directly or through another member, and each of the first leg and the second leg can be opposed to the “side of the cargo bed”. 2. The stepladder combined carriage according to claim 1, wherein the carriage is configured to be aligned in a planar direction of the cargo bed when facing the end face. 3. Each of the first leg and the second leg is provided with an auxiliary leg that can project a predetermined distance in a direction away from the cargo bed from an end of each leg that is away from the cargo bed. The stepladder combined carriage according to claim 1, wherein the carriage is a stepladder combined carriage.