JP7453095B2 - Lifting steps and loading platform unit - Google Patents

Description

The present invention relates to a lifting step and a loading platform unit that can be attached to and removed from the loading platform of a transport vehicle including a trailer, a truck, etc.

An example of a lifting step that can be attached to and removed from the loading platform of a transport vehicle including a trailer, a truck, etc. is described in Patent Document 1. The lifting step described in Patent Document 1 includes a pair of columns, a plurality of step bars attached to the pair of columns at intervals, an upper metal fitting and a lower metal fitting attached to the pair of columns, and an upper metal fitting. It has an upper presser piece attached to the lower metal fitting and a lower presser piece attached to the lower metal fitting.

In the lifting step described in Patent Document 1, a fan plate attached to the side of the loading platform via a hinge is placed in a horizontal state, and the fan plate is sandwiched from above and below by an upper holding piece and a lower holding piece. By bringing the legs attached to the lower end into contact with the ground, the top of the fan plate can be used as a work space for workers to stand on, and as a temporary storage space for cargo during loading and unloading. There is.

Japanese Patent Application Publication No. 2008-285815

However, the elevating step described in Patent Document 1 does not take into consideration the case where a worker ascends and descends from the rear of the cargo platform, and there is room for improvement in this respect.

An object of the present invention is to provide a lifting step and a loading platform unit that allow a worker to ascend and descend from the side and rear onto the loading platform.

The lifting step of the present invention includes a main body that can be attached to and removed from a loading platform loaded on a transport vehicle, and a step provided on the main body and on which a worker rests his or her feet. , an attachment/detachment part that allows the main body to be attached to and removed from the loading platform with respect to a fan plate provided on the side of the loading platform so as to be openable and closable, and a structural member provided at the rear of the loading platform; and the main body. a first positioning member that contacts the agitating plate when attached to the agitating plate to position the main body with respect to the agitating plate; and a first positioning member that contacts the structural member when the main body is attached to the structural member and contacts the agitating plate; and a second positioning member that positions the main body with respect to the loading platform.

The loading platform unit of the present invention includes a loading platform loaded on a transport vehicle, and a lifting step that can be attached to and detached from the loading platform, and the lifting step is provided on the main body, and , the main body is selectively attached to a footrest on which a worker rests his/her feet, a fan plate provided on the side of the loading platform so as to be openable and closable, and a structural member provided at the rear of the loading platform; a detachable part that is removable; a first positioning member that contacts the fan plate to position the main body with respect to the fan plate when the main body is attached to the fan plate; and a first positioning member that positions the main body with respect to the fan plate; a second positioning member that contacts the structural member to position the main body relative to the loading platform when the main body is moved.

According to the lifting unit of the present invention, by changing the position at which the main body is attached to the loading platform, a worker can climb up and down the loading platform from either the side or the rear.

According to the loading platform unit of the present invention, by changing the position at which the main body is attached to the loading platform, an operator can climb up and down the loading platform from either the side or the rear.

FIG. 1 is a perspective view of a carrier vehicle having a loading platform unit according to the present invention. It is a diagram showing a state in which the lifting step is removed from the door of the loading platform and attached to the rear frame of the loading platform. (A) is a side view of a lifting step with both the first and second treads closed, and (B) is a side view of the lifting step with both the first and second treads open. FIG. It is a top view of the state where the step for raising/lowering is attached to the rear frame of a loading platform. 3 is a partially enlarged view of FIG. 2. FIG. It is a side view of the state where the step for raising and lowering is attached to the rear frame of a loading platform. FIG. 6B is a partially enlarged view of FIG. 6A. It is a side view of the state where the step for raising/lowering is attached to the fan board. It is a perspective view of the state where the step for raising and lowering is attached to the fan plate. It is a figure of the state where the step for raising/lowering is stored in the door of a loading platform.

An embodiment of the lifting step and loading platform unit of the present invention will be described with reference to the drawings.

The lifting step and platform unit in this embodiment are applicable to transport vehicles including trailers, trucks, and the like. The transport vehicle 10 shown in FIG. 1 has a cab 12 having wheels 11, a chassis frame connected to the cab 12, and wheels 13 provided below the chassis frame. The loading platform 14 is loaded on the chassis frame. The loading platform 14 is also called a container, and can be loaded onto and unloaded from the chassis frame. The loading platform 14 may be fixed to the chassis frame.

A lifting step 15 that can be attached to and removed from the loading platform 14 is provided. The loading platform 14 and the lifting step 15 constitute a loading platform unit 16. The loading platform 14 has a front wall 17, a rear frame 18, a floor plate 19, a support beam 20, two wings 21, two fan plates 22, and two doors 23. The front wall 17 is provided between the cab 12 and the rear frame 18 in the traveling direction of the transport vehicle 10, that is, in the front-rear direction of the transport vehicle 10.

The rear frame 18 is located at the rearmost position in the traveling direction of the transport vehicle 10, that is, in the front-rear direction of the loading platform 14. An engagement fitting 24 is attached to the end of the rear frame 18. As shown in FIG. 5, a plurality of engagement fittings 24, for example two, are fixed by screw members 25. The two engaging fittings are provided at intervals in the left and right direction of the loading platform 14, that is, in the width direction.

Floor plate 19 connects the lower end of front wall 17 and the lower end of rear frame 18 . Support beam 20 connects the upper end of front wall 17 and the upper end of rear frame 18 . The two wings 21 are attached to the support beam 20 via hinges so that they can be operated, that is, opened and closed. The two wings 21 each have an L-shape, and when the two wings 21 are closed, the two wings 21 are located from the top to the side of the loading platform 14.

The two fanning plates 22 are attached to the loading platform 14 via hinges 26 shown in FIG. 8 so as to be operable, that is, to be openable and closable. When the two fan plates 22 are closed, the two fan plates 22 are located on the sides of the loading platform 14. When the two wings 21 are closed, the fan plate 22 is located below the wings 21 in the height direction of the loading platform 14, that is, in the direction in which gravity acts.

The two doors 23 are attached to the rear frame 18 via hinges 27 so as to be openable and closable. The two doors 23 are so-called double doors. The space surrounded by the two wings 21, the two fan plates 22, the floor plate 19, and the two doors 23 is a storage chamber 28 for articles and luggage.

As shown in FIGS. 5 and 8, the lifting step 15 includes a plurality of columns, specifically columns 29 and 30, and a first step 31 and a second step 32 attached to the columns 29 and 30. . The supports 29 and 30 are both made of metal, for example, aluminum or iron pipes. An end cap 34 is attached to one end of each of the struts 29 and 30 in the length direction, and specifically, is covered with the end cap 34 . The end cap 34 is made of synthetic resin, for example.

The struts 29 and 30 are connected by connecting members 33 and 47 shown in FIG. The connecting members 33, 47 are made of metal, for example aluminum or iron. The struts 29, 30 connected by the connecting members 33, 47 are substantially parallel. The connecting members 33 and 47 are provided at intervals in the length direction of the columns 29 and 30. The connecting member 33 is provided between the end cap 34 and the connecting member 47 in the longitudinal direction of the struts 29,30.

The first step 31 and the second step 32 are stepped on by the feet of the worker. The first step rail 31 and the second step rail 32 are each made of a metal plate, such as aluminum or iron, that has the strength to support the weight of the worker. The first step 31, the second step 32, and the connection member 33 are provided at intervals in the length direction of the columns 29, 30. A second step 32 is provided between the end cap 34 and the first step 31 in the length direction of the columns 29, 30. A connecting member 33 is provided between the end cap 34 and the second step 32 in the length direction of the columns 29, 30.

The first step 31 is operably attached to the columns 29 and 30 via a hinge 35 shown in FIGS. 3(A) and 3(B). The first step 31 protrudes from the pillars 29, 30 in the thickness direction of the pillars 29, 30. The first step 31 is movable within a predetermined angular range relative to the supports 29 and 30.

The first step 31 has a stopper 36, and when the stopper 36 comes into contact with the columns 29, 30 as shown in FIG. Stop at. When the first step 31 comes into contact with the columns 29, 30 as shown in FIG. 3(B), the first step 31 stops at a closed position relative to the columns 29, 30.

The second step 32 is attached to the supports 29 and 30 via a hinge 37. The second step 32 is movable within a predetermined angular range relative to the supports 29 and 30. The second step 32 protrudes from the pillars 29, 30 in the thickness direction of the pillars 29, 30. The first step 31 and the second step 32 protrude from the supports 29 and 30 in the same direction.

The second step 32 has a stopper 38, and when the stopper 38 comes into contact with the first column 29 and the column 30, the second step 32 stops at a position open to the columns 29, 30. When the second step 32 contacts the columns 29 and 30, the second step 32 stops at a closed position relative to the columns 29 and 30. When the first step 31 and the second step 32 are both opened and stopped as shown in FIG. The length of the crosspiece 32 exceeds the length projected from the supports 29 and 30.

As shown in FIG. 3(A), FIG. 3(B), FIG. 4, and FIG. 6B, hooks 39 are provided on the pillars 29 and 30, respectively. The hook 39 is an element for selectively temporarily attaching the lifting step 15 to the fan plate 22 or the rear frame 18. When the lifting step 15 is viewed from the side as shown in FIGS. 3(A) and 3(B), the hook 39 has a first step 31 and a second step 32 attached to the supports 29, 30. It is located on the opposite side of where you are.

That is, when the lifting step 15 is viewed from the side, the hook 39 projects from the pillars 29, 30 in the thickness direction of the pillars 29, 30. The direction in which the hook 39 projects from the supports 29, 30 is opposite to the direction in which the first step 31 and the second step 32 project from the supports 29, 30. That is, the struts 29 and 30 are located between the hook 39 and the first and second footrests 31 and 32.

The hook 39 is provided between the end cap 34 and the connecting member 33 in the length direction of the struts 29,30. The hooks 39 are welded and fixed to the pillars 29 and 30, respectively, and the hooks 39 are reinforced by ribs 40. The hook 39 and the rib 40 are made of metal. A buffer member 41 is attached to cover the inner surface of the hook 39, a portion of the outer surface of the column 29, and a portion of the outer surface of the column 30. The buffer member 41 is made of synthetic rubber.

As shown in FIG. 6(B), a holder 43 is attached to the connecting member 33 via a hinge 42, and a positioning member 44 is fixed to the holder 43. The holder 43 is provided along the length direction of the connection member 33. The holder 43 is, for example, a metal pipe with a square cross-sectional shape. The holder 43 is movable within a predetermined angular range with respect to the connecting member 33 by the hinge 42 . The holder 43 can be stopped at a first position shown by a solid line in FIG. 3(B) and a second position shown by a broken line in FIG. 3(B).

The positioning member 44 is an element for positioning the columns 29 and 30 with respect to the loading platform 14 when the lifting step 15 is attached to the rear frame 18 as shown in FIGS. 2, 5, and 6A. The positioning member 44 is fixed to the outer surface of the holder 43. The positioning member 44 is made of synthetic rubber or synthetic resin, for example. The positioning member 44 is fixed to the holder 43 at a location farthest from the support columns 29 and 30 when the holder 43 is stopped at the first position as shown in FIG. 3(B).

When the lifting step 15 is viewed from the side and the holder 43 is stopped at the first position as shown in FIG. This is the same direction as the direction in which the pillars 29 and 30 project. When the lifting step 15 is viewed from the side and the holder 43 is stopped at the second position as shown in FIG. This is the opposite direction to the direction in which the pillars 29 and 30 project.

A positioning member 45 is provided in the longitudinal direction of each of the struts 29, 30 near the end opposite to the end to which the end cap 34 is attached. The positioning member 45 is an element for positioning the support columns 29 and 30 with respect to the fan plate 22 when the lifting step 15 is temporarily attached to the fan plate 22 as shown in FIGS. 7 and 8. 3(A) and 3(B) show an example in which the first step 31 is arranged between the second step 32 and the positioning member 45 in the length direction of the columns 29, 30. There is.

The positioning members 45 are fixed to the outer surfaces of the columns 29 and 30, respectively. The direction in which the positioning member 45 projects from the pillars 29 and 30 is the same as the direction in which the hook 39 projects from the pillars 29 and 30. Further, the positioning member 45 is made of, for example, synthetic rubber or synthetic resin.

Furthermore, a grip 46 is provided on at least one of the struts 29 and 30. The grip 46 is made of metal, for example, and is provided for the operator to grasp with his or her hand. FIG. 5 shows an example in which the grip 46 is provided only on the support column 29. Note that the grip 46 may not be provided.

A first support plate 48 and a second support plate 49 as shown in FIGS. 2 and 9 are attached to the inner surface of one of the two doors 23 shown in FIG. 1. The first support plate 48 and the second support plate 49 are elements that support the lifting step 15 that has been removed from the loading platform 14. The first support plate 48 and the second support plate 49 are provided at intervals in the height direction. The first support plate 48 is provided above the second support plate 49. The first support plate has 48, two support fittings 50, and an engaging fitting 51. The second support plate 49 has an engagement fitting 52 . Furthermore, a belt 53 is provided. The belt 53 is an element for maintaining the posture of the lifting step 15. A hook 54 is provided at a first end of the belt 53 in the length direction, and a hook 55 is provided at a second end of the belt 53 in the length direction.

When an operator attaches the lifting step 15 to the rear frame 18 with the door 23 open as shown in FIG. 2, the following work is performed. The lifting step 15 is removed from the door 23 as shown in FIG. 3(B). The worker stops the first step 31 and the second step 32 at the open position relative to the supports 29 and 30. Further, the operator stops the holder 43 at the first position shown by the solid line in FIG. 3(B). Then, the operator hooks the hook 39 onto the engagement fitting 24 as shown in FIG. 6B. Specifically, the buffer member 41 is brought into contact with the engaging metal fitting 24 .

Then, as shown in FIGS. 2, 4, 5, and 6A, the lifting step 15 hangs down by its own weight using the hook 39 as a fulcrum, and the engagement tool 24 receives the load of the lifting step 15. The center of gravity of the lifting step 15 is located below the hook 39, and the hook 39 projects from the pillars 29, 30 in the thickness direction of the pillars 29, 30. Therefore, the lifting step 15 is biased counterclockwise in FIG. 6A using the hook 39 as a fulcrum, the positioning member 44 contacts the rear frame 18, and the lifting step 15 is positioned with respect to the rear frame 18. Ru.

That is, the rear frame 18 receives the load of the lifting step 15 and supports the lifting step 15 at two different locations in the length direction of the columns 29 and 30, that is, at the hook 39 and the positioning member 44. Note that when the lifting step 15 is temporarily attached to the rear frame 18, the positioning member 45 is located below the loading platform 14 in the height direction of the loading platform 14, as shown in FIG. 6A. Do not contact the frame 18.

When the lifting step 15 is temporarily attached to the rear frame 18 in this way, the lower end of the lifting step 15, that is, the end of the support 29 and the end of the support 30 are both raised from the ground 56, as shown in FIG. are spaced apart. Further, a portion of the support column 29 in the length direction and a portion of the support column 30 in the length direction are located above the upper surface of the floorboard 19.

When the worker enters the storage chamber 28 from the ground 56, he first places his first foot on the first step 31, and then puts his second foot on the second step 32 to shift his weight. The user ascends the elevating step 15 and enters the storage chamber 28. When the worker descends from the storage chamber 28 to the ground 56, he places his first foot on the second step 32, then puts his first foot on the first step 31, thereby shifting his weight and lifting. After getting off the step 15, the worker stands on the ground 56. Note that when the operator lifts the lifting step 15 and removes the hook 39 from the engagement fitting 24, the lifting step 15 can be removed from the rear frame 18.

When an operator attaches the lifting step 15 to the fan plate 22, the following work is performed. First, the fan plate 22 is opened as shown in FIG. Further, the worker stops the first step 31 and the second step 32 at the open position relative to the supports 29 and 30. Furthermore, the operator stops the holder 43 at the second position shown by the broken line in FIG. 3(B). Then, the worker hangs the hook 39 on the edge of the fan plate 22.

Then, the lifting step 15 hangs down by its own weight using the hook 39 as a fulcrum, and the fan plate 22 receives the load of the lifting step 15. The lifting step 15 is biased clockwise in FIG. 7 using the hook 39 as a fulcrum, and the positioning member 45 contacts the fanning plate 22 to stop the lifting step 15. That is, the fan plate 22 receives the load of the lifting step 15 at two different locations in the length direction of the columns 29 and 30, that is, at the hook 39 and the positioning member 45, and supports the lifting step 15. Note that the holder 43 is stopped at the second position shown by the broken line in FIG.

When the elevating step 15 is temporarily attached to the fan plate 22 in this way, the lower end of the elevating step 15, that is, the ends of the supports 29 and 30 are both spaced apart from the ground 56. Further, a portion of the pillars 29 and 30 in the length direction is located above the upper surface of the floorboard 19. When the worker enters the storage chamber 28 from the ground 56, the worker steps on the first step 31 and the second step 32 with his feet in order, and enters the storage chamber 28 in the same manner as described above. When the worker descends from the storage chamber 28 to the ground 56, the worker stands on the ground 56 by stepping on the second step 32 and the first step 31 in this order. Note that when the operator lifts the lifting step 15 and removes the hook 39 from the lifting plate 22, the lifting step 15 can be removed from the lifting plate 22.

In this way, in both cases where cargo handling is carried out by opening the fanning plate 22 provided on the side of the cargo platform 14, or when cargo handling is carried out by opening the door 23 provided at the rear of the cargo platform 14, the elevating and lowering The step 15 can be selectively temporarily attached to and removed from the rear frame 18 and the fan plate 22, improving work efficiency.

FIG. 9 shows a state in which the lifting step 15 is housed inside the door 23. As shown in FIG. The hook 39 is hung on the support fitting 50, and the columns 29, 30 are suspended substantially vertically by their own weight. The positioning member 45 is in contact with the second support plate 49. Further, the holder 43 is stopped at the second position similarly to FIG. 3(A), and the first step 31 and the second step 32 are stopped at the closed position with respect to the supports 29 and 30. Then, the hook 54 is hung on the engaging metal fitting 51, and the hook 55 is hooked on the engaging metal fitting 52.

In other words, the belt 53 prevents the lifting step 15 from vibrating about the hook 39 as a fulcrum. The lower end of the lifting step 15 is located above the lower end of the door 23. Therefore, the door 23 can be opened and closed with the lifting step 15 housed inside the door 23. In addition, when removing the lifting step 15 from the door 23, the hook 55 is released from the engagement fitting 52, and the operator lifts the lifting step 15 to release the hook 39 from the support fitting 50. Furthermore, the operator can carry the lifting step 15 by holding the grip 46 with his/her hand.

An example of the technical meaning of the matter disclosed in this embodiment is as follows. The loading platform 14 is an example of a loading platform, the elevating step 15 is an example of an elevating step, the pair of supports 29 and 30 are an example of the main body, and the first step 31 and the second step 32 are , the fanning board 22 is an example of a fanning board, the rear frame 18 is an example of a structural member, the hook 39 is an example of an attachment/detachment part, and the positioning member 45 is an example of a first The positioning member 44 is an example of a positioning member, and the first support plate 48, the second support plate 49, and the support fitting 50 are examples of support parts. The first direction and the second direction are opposite to each other with respect to the main body. Moreover, any one of the thickness directions of the struts 29 and 30 is an example of the first direction. The first direction is not a direction limited to the main body, but means a direction approaching the loading platform 14. The first direction and the second direction may be opposite to each other.

The embodiments are not limited to the above embodiments, and various changes can be made without departing from the gist thereof. For example, the main body may be a metal frame or a metal plate instead of the two struts. Instead of being movable relative to the main body, the step rail may be a step rail fixed to the main body. When engaging the detachable part with the fan plate, the detachable part may be engaged with an engaging part provided on the fan plate instead of engaging the detachable part with the edge of the fan plate.

The engagement tool 24 provided on the loading platform 14 is an engagement part to which the lifting step 15 can be attached and removed, and the engagement part includes, in addition to the engagement tool 24, a protrusion, a hook, a pawl, a ring, and the like. The attachment/detachment part may have any shape as long as it can be engaged with and released from the engagement part of the loading platform, and the attachment/detachment part may be a pin having a head instead of a hook.

The lifting step disclosed in this embodiment also includes the following features. The main body has a pair of pillars arranged in parallel, and the step rail is operably attached to the pair of pillars so that it can approach and move away from the pair of pillars. The loading platform unit disclosed in this embodiment also includes the following features. When the detachable part is engaged with the fan plate and the main body is attached to the fan plate, the first positioning member is brought into contact with the fan plate below the detachable part in the height direction of the loading platform, and the detachable part is brought into contact with the engaging part. When the main body is hung and attached to the structural member, the second positioning member comes into contact with the structural member below the attachment/detachment part in the height direction of the loading platform.

14... Loading platform, 15... Lifting step, 16... Loading platform unit, 18... Rear frame, 22... Fan plate, 29, 30... Support column, 31... First stepping rail, 32... Second stepping rail, 39... Hook, 44 , 45... Positioning member, 48... First support plate, 49... Second support plate, 50... Support metal fittings

Claims (7)

A main body that can be attached to and removed from a loading platform loaded on a transport vehicle;
A lifting step provided on the main body and having a step on which a worker hangs his/her feet,
an attachment/detachment part that allows the main body to be attached to and removed from the loading platform with respect to a fan plate provided on the side of the loading platform so as to be openable and closable, and a structural member provided at the rear of the loading platform;
a first positioning member that contacts the fan plate and positions the main body with respect to the fan plate when the main body is attached to the fan plate;
a second positioning member that contacts the structural member to position the main body with respect to the loading platform when the main body is attached to the structural member;
A step for lifting and lowering. The lifting step according to claim 1,
The removable part protrudes from the main body in a first direction,
The step bar projects from the main body in a second direction opposite to the first direction,
When the detachable part is engaged with the fan plate, the main body is attached to the fan plate,
The elevating/lowering step, wherein the main body is attached to the structural member when the detachable portion is engaged with an engaging portion provided on the structural member. In the lifting step according to claim 2,
the first positioning member protrudes from the main body in the first direction;
The second positioning member is operable with respect to the main body, and has a first position where it projects from the main body in the first direction, and a second position where it projects from the main body in the second direction. each stopped at
When the main body is attached to the fan plate, the first positioning member is brought into contact with the fan plate,
The lifting step, wherein the second positioning member is stopped at the first position and the second positioning member is brought into contact with the structural member when the main body is attached to the structural member. A loading platform loaded on a transport vehicle,
a lifting step that can be attached to and removed from the loading platform;
has
The lifting step is
The main body and
a step pedestal provided on the main body and on which a worker hangs his/her feet;
an attachment/detachment portion that allows the main body to be selectively attached to and removed from a fan plate provided on the side of the loading platform so as to be openable and closable, and a structural member provided at the rear of the loading platform;
a first positioning member that contacts the fan plate and positions the main body with respect to the fan plate when the main body is attached to the fan plate;
a second positioning member that contacts the structural member to position the main body with respect to the loading platform when the main body is attached to the structural member;
A loading platform unit with a The loading platform unit according to claim 4,
The removable part protrudes from the main body in a first direction,
The step bar projects from the main body in a second direction opposite to the first direction,
When the detachable part is engaged with the fan plate, the main body is attached to the fan plate,
A loading platform unit in which the main body is attached to the structural member when the detachable part is hooked to an engaging part provided on the structural member. The loading platform unit according to claim 5,
the first positioning member protrudes from the main body in the first direction;
The second positioning member is operable with respect to the main body, and has a first position where it projects from the main body in the first direction, and a second position where it projects from the main body in the second direction. each stopped at
When the main body is attached to the fan plate, the first positioning member is brought into contact with the fan plate,
A loading platform unit, wherein the second positioning member is stopped at the first position and when the main body is attached to the structural member, the second positioning member is brought into contact with the structural member. The loading platform unit according to any one of claims 4 to 6,
a door that can be opened and closed with respect to the loading platform;
a support part provided on the door and supporting the lifting step;
A loading platform unit with a

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