Load-receiving platform lifting device

Abstract

To provide a load-receiving platform lifting device which can reduce the effort required to operate an outrigger.SOLUTION: A load-receiving platform lifting device comprises: a lifting device 3 for lifting and lowering a road-receiving platform 2; an outrigger 4; and a first engagement part 5 which can engage with and disengage from the outrigger 4 and a movable part of the lifting device 3. The lifting device 3 has: an outer column 30 which is fixed to a load-carrying platform and extends in a vertical direction; a movable body which is attached to the outer column 30 and is movable in the vertical direction; a driving source 33; and a drive transmission mechanism 34 which transmits drive power of the driving source 33 to the movable body and vertically moves the same. The outrigger 4 has a fixed part 40 which is fixed to the outer column 30, and an entering / exiting part 41 which enters and exits with respect to the fixed part, and the first engagement part 5 can engage with and disengage from the entering / exiting part 41 and the movable body.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a load-carrying platform lifting device.

Background Art

[0002] As such a load-carrying platform lifting device, for example, a rear gate lifter as disclosed in Patent Document 1 is known.

[0003] The rear gate lifter includes a guide post disposed at the rear end of the deck of the vehicle body, the guide post being composed of an outer post fixed to the deck and an inner post slidably fitted up and down within the outer post, a bridge plate bolted to the outer post and the lower part of the deck, an outrigger rotatably attached to the bridge plate, a bracket slidably fitted up and down to the inner post, and a rear gate attached to the bracket.

[0004] When loading and unloading luggage using such a rear gate lifter, the inner post and the outrigger are grounded, and then the rear gate is lifted and lowered.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] By the way, in the above-described conventional rear gate lifter, when making the rear gate in a state where it can be lifted and lowered, operations on the inner post and operations on the outrigger are required, so the operation for making the rear gate in a state where it can be lifted and lowered is time-consuming.

[0007] Therefore, in view of such circumstances, an object of the present invention is to provide a loading platform lifting device capable of reducing the labor of operations for making the rear gate movable up and down.

Means for Solving the Problems

[0008] The loading platform lifting device of the present invention is a loading platform lifting device installed on a loading platform of a vehicle, a loading platform for receiving loads, a lifting device for lifting and lowering the loading platform, an outrigger attached to the lifting device, the outrigger serving as a support column of the lifting device, and a first engaging portion detachably engageable with the outrigger and a movable portion of the lifting device. The lifting device includes an outer column extending vertically while being fixed to the loading platform, a moving body attached to the outer column and movable in the vertical direction, a drive source, and a drive transmission mechanism configured to move the moving body in the vertical direction by transmitting the driving force of the drive source to the moving body. The outrigger includes a fixing portion fixed to the outer column, and a retractable portion movably attached to the fixing portion in the vertical direction in a downwardly attached state with respect to the fixing portion. The first engaging portion is detachably engageable with the retractable portion and the moving body.

[0009] According to the loading platform lifting device having the above configuration, when the first engaging portion engages the retractable portion and the moving body, the retractable portion and the moving body are connected by the first engaging portion. Therefore, when the moving body moves in the vertical direction, the retractable portion also moves in the vertical direction together with the moving body.

[0010] Therefore, since the load receiving platform lifting device can be grounded by moving the moving body downward and also moving the retractable part downward, it is possible to reduce the labor of operating the outrigger, which is an operation for making the rear gate liftable.

[0011] In the load receiving platform lifting device of the present invention, It may be configured to include a second engaging portion that can be engaged with and disengaged from the retractable part and the outer column.

[0012] In this way, when the second engaging portion is engaged with the retractable part and the outer column in a state where the retractable part is grounded, it becomes easier to stabilize the state where the retractable part is extended.

[0013] The load receiving platform lifting device of the present invention, It may be configured to include an engagement / disengagement detection portion that detects at least one of a state where the first engaging portion is engaged with the retractable part and the moving body and a state where the first engaging portion is disengaged from the retractable part and the moving body.

[0014] In this way, even if the first engaging portion becomes disengaged from the retractable part and the moving body, it is possible to know that, and it becomes easier to prevent the state where the retractable part is extended from becoming unstable.

[0015] The load receiving platform lifting device of the present invention, The first engaging portion and the second engaging portion are constituted by one common member, The common member may be engageable with and disengageable from the retractable part and the moving body, and may also be engageable with and disengageable from the retractable part and the outer column.

[0016] In this way, since one common member can be used as both the first engaging portion and the second engaging portion, the cost can be reduced.

Effects of the Invention

[0017] As described above, the loading platform lifting device of the present invention can achieve an excellent effect of suppressing the labor required for the operation to make the rear gate liftable.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying Out the Invention

[0019] Hereinafter, a loading platform lifting device according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0020] As shown in FIG. 1, the load receiving platform lifting device 1 is a device installed on the loading platform V1 of the vehicle V and is used when loading and unloading luggage.

[0021] In the following description, the direction corresponding to the front-rear direction of the vehicle V is referred to as the front-rear direction, the up-down direction is referred to as the up-down direction, and the direction orthogonal to the front-rear direction and the up-down direction is referred to as the lateral direction.

[0022] The load receiving platform lifting device 1 of the present embodiment includes a load receiving platform 2 for receiving luggage, a lifting device 3 for lifting the load receiving platform 2, and an outrigger 4 attached to the lifting device 3, where the outrigger 4 serves as a support column of the lifting device 3. As shown in FIG. 2, the load receiving platform lifting device 1 further includes a first engaging portion 5 detachably engaged with the outrigger 4 and the movable part of the lifting device 3, and a second engaging portion 6 detachably engaged with the outrigger 4 and the immovable part of the lifting device 3.

[0023] In the load receiving platform lifting device 1 of the present embodiment, the first engaging portion 5 and the second engaging portion 6 are constituted by a single common member 7. That is, the common member 7 is a member that can be used as the first engaging portion 5 or the second engaging portion 6.

[0024] The load receiving platform 2 is plate-shaped and is configured such that luggage can be placed on its upper surface or a person can ride on it.

[0025] The lifting device 3 includes an outer column 30 that extends in the vertical direction while being fixed to the loading platform V1, and an inner column 31 that is disposed within the outer column 30 in a vertically slidable state. The inner column 31 is configured to protrude from the outer column 30 by moving downward with respect to the outer column 30 (in an extended state), and to retract into the outer column 30 by moving upward with respect to the outer column 30 (in a retracted state). The lifting device 3 also includes a slider 32 that is connected to the inner column 31 and the load receiving platform 2 and moves vertically together with the inner column 31, a drive source 33 (see FIG. 3), and a drive transmission mechanism 34 (see FIG. 4) that is connected to the drive source 33 and the slider 32 and is configured to move the inner column 31 in the vertical direction by transmitting the driving force of the drive source 33 to the inner column 31.

[0026] In the lifting device 3 of the present embodiment, the inner column 31 and the slider 32 constitute a moving body (the movable part of the lifting device 3) that is attached to the outer column 30 and is movable in the vertical direction, and the outer column 30 constitutes the non-movable part of the lifting device 3.

[0027] Also, although the inner column 31 is directly attached to the outer column 30, the slider 32 is attached to the outer column 30 via the inner column 31.

[0028] And, the first engaging portion 5 of the present embodiment is configured to be detachable between the outrigger 4 and the inner column 31 which is a moving body, and the second engaging portion 6 of the present embodiment is configured to be detachable between the outrigger 4 and the outer column 30 which is the non-movable part of the lifting device 3.

[0029] The outer column 30 is formed in a columnar shape. Also, the outer column 30 is hollow, and an outer slit 301 that communicates inside and outside is formed in the rear wall 300.

[0030] The outer slit 301 is formed to extend along the entire length of the outer column 30 in the vertical direction, but the upper end portion is blocked (shielded) in the vertical direction.

[0031] More specifically, at the upper end of the outer column 30, a plate-shaped outer closing portion 302 is fixed to one part and the other part of the rear wall 300 with the outer slit 301 as a boundary. Since the upper end of the outer slit 301 is blocked by this outer closing portion 302, it is in a blocked state in the vertical direction.

[0032] Therefore, only the lower end of the outer slit 301 is open in the vertical direction among the upper end and the lower end.

[0033] The inner column 31 is formed in a column shape. Further, the inner column 31 is hollow, and an inner slit 311 communicating inside and outside is formed in the rear wall 310.

[0034] The inner slit 311 is formed to extend along the entire length of the inner column 31 in the vertical direction, but the upper end of the inner slit 311 is blocked (shielded) in the vertical direction.

[0035] More specifically, at the upper end of the inner column 31, a plate-shaped inner closing portion 312 is fixed to one part and the other part of the rear wall 310 portion with the inner slit 311 as a boundary. Since the upper end of the inner slit 311 is blocked by this inner closing portion 312, it is in a blocked state in the vertical direction.

[0036] Therefore, only the lower end of the inner slit 311 is open in the vertical direction among the upper end and the lower end.

[0037] As described above, the inner column 31 is arranged in the outer column 30 in a state where it can slide in the vertical direction.

[0038] The inner column 31 is configured to protrude downward from the outer column 30 when it moves downward with respect to the outer column 30, and to retract into the outer column 30 when it moves upward with respect to the outer column 30.

[0039] In addition, in the portion of the inner column 31 that is disposed within the outer column 30, the inner slit 311 is arranged side by side with the outer slit 301 in the front-rear direction.

[0040] The slider 32 has a guided portion 320 that is guided by the inner slit 311 and the outer slit 301 and moves in the vertical direction, a roller 321 that is rotatably attached to the guided portion 320 and abuts against the inner surface of the rear wall 310 of the inner column 31, and a table connecting portion 322 that is provided on the guided portion 320 and is configured to be able to connect the load receiving table 2.

[0041] The guided portion 320 is inserted into the inner slit 311 in a state where it can move in the vertical direction.

[0042] Further, the guided portion 320 is configured to be able to enter and exit the outer slit 301 through the lower end portion of the outer slit 301. More specifically, the guided portion 320 is configured to be able to enter the outer slit 301 from the lower end portion of the outer slit 301 by moving upward and to be able to exit the outer slit 301 from the lower end portion of the outer slit 301 by moving downward.

[0043] Also, as described above, since the upper end portion of the inner slit 311 of the inner column 31 is blocked by the inner closing portion 312, in a non-grounded state, the inner closing portion 312 is supported by the guided portion 320 of the slider 32.

[0044] Therefore, when the slider 32 starts to move downward in a state where the inner column 31 and the slider 32 are located at the uppermost position (the topmost position) in the vertical direction, the inner column 31 also moves downward together with the slider 32.

[0045] Then, when the inner column 31 is grounded and the downward movement stops, only the slider 32 moves further downward and is grounded.

[0046] When the slider 32 starts to move upward in this state, only the slider 32 moves upward until it contacts the inner blocking portion 312. After the slider 32 contacts the inner blocking portion 312, the inner blocking portion 312 also moves upward together with the slider 32.

[0047] Thus, the load platform lifting device 1 of the present embodiment is configured such that the inner column 31 also moves in the vertical direction as the slider 32 moves in the vertical direction.

[0048] As shown in FIG. 3, the drive source 33 is composed of an oil tank 330 for storing hydraulic oil and a hydraulic cylinder 331 that expands and contracts in response to the supply and discharge of the hydraulic oil by the oil tank 330.

[0049] A hydraulic pump (not shown) is connected to the oil tank 330, and the internal hydraulic oil can be taken in and out by this hydraulic pump. Note that since the hydraulic cylinder 331 of the present embodiment is installed in a horizontal state, the expansion and contraction direction is also horizontal (a direction perpendicular to the vertical direction).

[0050] As shown in FIG. 4, the drive transmission mechanism 34 includes a wire 340 having one end connected to the slider 32 and the other end fixed so as not to move, a plurality of guide sheaves 341 disposed in the outer column 30 and around which one end side of the wire 340 is looped, and a plurality of operating sheaves 342 disposed between one outer column 30 and the other outer column 30 and around which the other end side of the wire 340 is looped and configured to pull the one end side of the wire 340.

[0051] The plurality of guide sheaves 341 may be composed of, for example, a vertical sheave 341a that changes the direction of the wire 340 in the vertical direction and a horizontal sheave 341b that changes the direction of the wire 340 from the vertical direction to the horizontal direction.

[0052] The plurality of operating sheaves 342 may be composed of, for example, a fixed sheave 342a with a fixed installation position and a movable sheave 342b that receives the power of the drive source 33 and contacts and separates from the fixed sheave 342a.

[0053] Since the movable sheave 342b is attached to the hydraulic cylinder 331 (the telescopic movable part of the hydraulic cylinder 331), it is configured to contact and separate from the fixed sheave 342a as the hydraulic cylinder 331 expands and contracts.

[0054] When the movable sheave 342b separates from the fixed sheave 342a, the amount of wire 340 wound by the movable sheave 342b and the fixed sheave 342a increases. As a result, one end side of the wire 340 is pulled, and thereby, the slider 32 connected to one end of the wire 340 is pulled upward.

[0055] When the movable sheave 342b approaches the fixed sheave 342a, the amount of wire 340 wound by the movable sheave 342b and the fixed sheave 342a decreases. Along with this, the slider 32 moves downward. That is, the slider 32 moves downward as the wire 340 wound by the movable sheave 342b and the fixed sheave 342a is paid out.

[0056] When pulling the slider 32 from the lowest position to the highest position, from the state where only the slider 32 is guided by the slit of the inner column 31 and moves upward, the slider 32 catches on the inner column 31 (the closed part of the inner slit 311 (inner closing part 312)) and moves upward together with the inner column 31.

[0057] When the hydraulic cylinder 331 contracts and the movable sheave 342b moves in the direction of approaching the fixed sheave 342a, the pulling operation of the wire 340 by the movable sheave 342b is released. Along with this, the slider 32 moves downward.

[0058] When lowering the slider 32 from the uppermost position to the lowermost position, the slider 32 alone is guided by the slit of the inner column 31 and moves downward from the state where the slider 32 and the inner column 31 move downward.

[0059] As shown in FIG. 2, the outrigger 4 has a fixing portion 40 (referred to as a case portion 40 in the description of the present embodiment) fixed to the outer column 30, and a retractable portion 41 that can move in the vertical direction while being attached downward with respect to the case portion 40. The case portion 40 of the present embodiment is fixed while being disposed inside the outer column 30.

[0060] The case portion 40 has a cylindrical shape and is configured such that only the lower end of the upper end portion and the lower end portion in the axial direction is open.

[0061] The retractable portion 41 has a cylindrical shape and is inserted into the case portion 40 from the opening on the lower end side of the case portion 40. Therefore, the retractable portion 41 is configured to protrude with respect to the case portion 40 when moving downward and retract into the case portion 40 when moving upward.

[0062] Here, a first engaged structure 8 that enables the first engaging portion 5 to be detachably engaged with the outrigger 4 and the inner column 31, and a second engaged structure 9 that enables the second engaging portion 6 to be detachably engaged with the outrigger 4 and the outer column 30 will be described.

[0063] The first engaged structure 8 is constituted by a first one-sided engaging portion 80 formed at the lower end portion of the retractable portion 41 and a first other-sided engaging portion 81 formed at the lower end portion of the inner column 31.

[0064] The first one-sided engaging portion 80 is constituted by a through hole that penetrates the retractable portion 41 laterally, and the first other-sided engaging portion 81 is constituted by a through hole that penetrates the inner column 31 laterally.

[0065] Since the direction in which the first one engaging portion 80 penetrates the retractable portion 41 and the direction in which the first other engaging portion 81 penetrates the inner column 31 are the same direction, if the first one engaging portion 80 and the first other engaging portion 81 are arranged side by side in the front-rear direction, the common member 7 can be inserted through the first one engaging portion 80 and the first other engaging portion 81.

[0066] The second engaged structure 9 is composed of a second one engaging portion 90 formed in the retractable portion 41 and having a formation position with respect to the retractable portion 41 above the first one engaging portion 80, and a second other engaging portion 91 formed in the outer column 30.

[0067] The second one engaging portion 90 is constituted by a through hole penetrating laterally with respect to the retractable portion 41, and the second other engaging portion 91 is constituted by a through hole penetrating laterally with respect to the outer column 30.

[0068] Since the direction in which the second one engaging portion 90 penetrates the retractable portion 41 and the direction in which the second other engaging portion 91 penetrates the outer column 30 are the same direction, if the second one engaging portion 90 and the second other engaging portion 91 are arranged side by side in the front-rear direction, the common member 7 can be inserted through the second one engaging portion 90 and the second other engaging portion 91.

[0069] Since the common member 7 of the present embodiment is formed in a rod shape, it can be used as the first engaging portion 5 when inserted into the first one engaging portion 80 and the first other engaging portion 81, and can be used as the second engaging portion 6 when inserted into the second one engaging portion 90 and the second other engaging portion 91.

[0070] The configuration of the load-carrying platform lifting device 1 according to the present embodiment is as described above. Subsequently, the usage method of the load-carrying platform lifting device 1 will be described.

[0071] When no loading and unloading operation of the load is being performed, the slider 32, the inner column 31, and the outrigger 4 of the load-carrying platform lifting device 1 are arranged at the uppermost position, and the load-carrying platform 2 is in a vertical orientation.

[0072] When loading and unloading luggage using the load receiving platform lifting device 1, the common member 7 is inserted through the first one - side engaging portion 80 and the first other - side engaging portion 81 (see Fig. 5). By doing so, the retractable portion 41 and the inner column 31 are connected by the common member 7. When the inner column 31 moves in the vertical direction, the retractable portion 41 also moves in the vertical direction in conjunction with the inner column 31.

[0073] When the slider 32 is moved downward in this state, the inner column 31 moves downward together with the slider 32, and the outer column 30 also moves downward. In this way, by moving the inner column 31 and the outer column 30 downward, the inner column 31 and the outer column 30 can be grounded (see Fig. 6).

[0074] After grounding the inner column 31 and the outer column 30, the common member 7 inserted through the first one - side engaging portion 80 and the first other - side engaging portion 81 is replaced with the second one - side engaging portion 90 and the second other - side engaging portion 91 (see Fig. 7). By doing so, since the retractable portion 41 and the outer column 30 are connected by the common member 7, the vertical movement of the retractable portion 41 is restricted.

[0075] Thereby, while supporting the outrigger 4, the load receiving platform 2 can be moved in the vertical direction to load and unload luggage.

[0076] After finishing using the load receiving platform lifting device 1, the common member 7 inserted through the second one - side engaging portion 90 and the second other - side engaging portion 91 is replaced with the first one - side engaging portion 80 and the first other - side engaging portion 81.

[0077] By doing so, the restriction on the vertical movement of the retractable portion 41 is released, and the retractable portion 41 moves in the same direction as the inner column 31 in conjunction with the vertical movement of the inner column 31.

[0078] Then, by moving the slider 32 to the uppermost position so that the inner column 31 and the outrigger 4 are also in the uppermost position, and switching the load receiving platform 2 to the folded state, the load receiving platform lifting device 1 returns to the original state.

[0079] As described above, according to the load receiving platform lifting device 1 according to the present embodiment, when the first engaging portion 5 is engaged with the retracting portion 41 and the inner column 31, the retracting portion 41 and the inner column 31 are connected by the first engaging portion 5. Therefore, when the inner column 31 moves in the vertical direction, the retracting portion 41 also moves in the vertical direction together with the inner column 31. Therefore, by simply moving the inner column 31 downward and moving the retracting portion 41 downward, it can be grounded, and thus, an excellent effect of suppressing the operation (the trouble of operating the outrigger 4) for making the rear gate liftable can be achieved.

[0080] In addition, since the second engaging portion 6 formed of the common member 7 can be engaged with and disengaged from the retracting portion 41 and the outer column 30, the retracting portion 41 can be made difficult to separate from the ground surface by engaging the common member 7 with the retracting portion 41 and the outer column 30.

[0081] In the load receiving platform lifting device 1 of the present embodiment, since the first engaging portion 5 and the second engaging portion 6 are formed by one common member 7, one common member 7 can be used as both the first engaging portion 5 and the second engaging portion 6, so that the cost can be suppressed.

[0082] Note that the load receiving platform lifting device 1 according to the present invention is not limited to the above embodiment, and it goes without saying that various changes can be made without departing from the gist of the present invention.

[0083] Although not particularly mentioned in the description of the load receiving platform lifting device 1 of the above embodiment, the load receiving platform lifting device 1 may include an engagement / disengagement detection unit that detects a state in which the first engaging portion 5 is engaged with the retracting portion 41 and the inner column 31 and a state in which the first engaging portion 5 is disengaged from the retracting portion 41 and the inner column 31.

[0084] In this way, even if the first engaging portion 5 disengages from the retracting / extending portion 41 and the inner column 31, the engagement / detachment detection unit can detect this, so it is less likely to enter a situation where the retracting / extending portion 41 easily separates from the ground surface. Note that the engagement / detachment detection unit may be composed of an optical sensor, a contact sensor, or the like.

[0085] Further, when the engagement / detachment detection unit detects that the first engaging portion 5 has disengaged from the retracting / extending portion 41 and the inner column 31, this detection result can be used as a signal to activate a notification device that emits sound or light, or as a signal for control such as stopping the operation of the outrigger 4 or the inner column 31 that is moving up and down, or slowing down the operation speed. In this way, even when the outrigger 4 or the inner column 31 moves up and down independently, it becomes easier to quickly stop its operation.

[0086] In the outrigger 4 of the above embodiment, the case portion 40 was fixed in a state where it was disposed inside the outer column 30, but it is not limited to this configuration. For example, the outrigger 4 may be fixed in a state where the case portion 40 is disposed outside the outer column 30.

[0087] The first engaging portion 5 and the second engaging portion 6 of the above embodiment were constituted by one member (common member 7), but it is not limited to this configuration. For example, the first engaging portion 5 and the second engaging portion 6 may be constituted separately.

[0088] Also, the first engaging portion 5 of the above embodiment was configured to be attachable and detachable to each of the outrigger 4 and the inner column 31. However, when the first engaging portion 5 and the second engaging portion 6 are constituted separately, the first engaging portion 5 may be fixed to one of the outrigger 4 and the inner column 31, and configured to be detachable from the other of the outrigger 4 and the inner column 31.

[0089] The first engaging portion 5 illustrated in FIGS. 8(a) and 8(b) is constituted by a clamp, and is configured to be able to sandwich the inner column 31 in a state of being fixed to the outrigger 4.

[0090] In this case, if the inner column 31 is clamped by the first engaging portion 5, the first engaging portion 5 as a whole engages with the outrigger 4 and the inner column 31.

[0091] Furthermore, as a mode different from the modes shown in FIGS. 8(a) and 8(b), the first engaging portion 5 may be configured to have a first engaging portion 50 fixed to the outrigger 4 and a second engaging portion 51 fixed to the inner column 31 as shown in FIGS. 9(a) and 9(b), and to be able to switch between a state where the first engaging portion 50 and the second engaging portion 51 are engaged and a state where the engagement is released.

[0092] In this case, if the first engaging portion 50 and the second engaging portion 51 are engaged, the first engaging portion 5 as a whole engages with the outrigger 4 and the inner column 31.

[0093] Thus, the first engaging portion 5 may be configured to be able to regulate the relative movement in the vertical direction between the outrigger 4 and the inner column 31 in any case, including the mode of the above-described embodiment.

[0094] In the description of the common member 7 of the above embodiment, although not particularly mentioned, it is preferable that the common member 7 is detachable with respect to the first one engaging portion 80 and the first other engaging portion 81, and is also configured to be detachable with respect to the second one engaging portion 90 and the second other engaging portion 91.

[0095] In addition, when the first engaging portion 5 and the second engaging portion 6 are separately configured, it is preferable that the first engaging portion 5 is configured to be detachable with respect to the first one engaging portion 80 and the first other engaging portion 81, and the second engaging portion 6 is also configured to be detachable with respect to the second one engaging portion 90 and the second other engaging portion 91.

[0096] The first engaging portion 5 of the above-described embodiment was configured to be detachable from the outrigger 4 and the inner column 31 which is a moving body, but is not limited to this configuration. For example, the first engaging portion 5 may be configured to be detachable from the outrigger 4 and the slider 32 which is a moving body. In this case, the lifting device 3 may not include the inner column 31.

Description of Reference Numerals

[0097] 1…Load receiving platform lifting device, 2…Load receiving platform, 3…Lifting device, 4…Outrigger, 5…First engaging portion, 6…Second engaging portion, 7…Common member, 8…First engaged structure, 9…Second engaged structure, 30…Outer column, 31…Inner column, 32…Slider, 33…Drive source, 34…Drive transmission mechanism, 40…Fixed portion (case portion), 41…Retracting / extending portion, 50…One first engaging portion, 51…The other first engaging portion, 80…First one engaging portion, 81…First other engaging portion, 90…Second one engaging portion, 91…Second other engaging portion, 300…Rear wall, 301…Outer slit, 302…Outer closing portion, 310…Rear wall, 311…Inner slit, 312…Inner closing portion, 320…Guided portion, 321…Roller, 322…Connecting portion for platform, 330…Oil tank, 331…Hydraulic cylinder, 340…Wire, 341…Guide sheave, 341a…Vertical sheave, 341b…Horizontal sheave, 342…Operating sheave, 342a…Fixed sheave, 342b…Movable sheave, V…Vehicle, V1…Load platform

Claims

1. A load receiving platform lifting device installed on a vehicle loading platform, comprising: A load receiving platform for receiving loads; A lifting device for lifting and lowering the load receiving platform; An outrigger attached to the lifting device, the outrigger serving as a support column of the lifting device; A first engaging portion detachably engageable with the outrigger and a movable part of the lifting device. The lifting device includes: An outer column extending vertically while fixed to the loading platform; A moving body attached to the outer column and movable in the vertical direction; A drive source; A drive transmission mechanism configured to move the moving body in the vertical direction by transmitting the driving force of the drive source to the moving body. The outrigger includes: A fixing portion fixed to the outer column; A retractable portion movably attached downward to the fixing portion in the vertical direction. The first engaging portion is detachably engageable with the retractable portion and the moving body. A load receiving platform lifting device.

2. The load receiving platform lifting device according to claim 1, further comprising a second engaging portion detachably engageable with the retractable portion and the outer column. The load receiving platform lifting device according to claim 1.

3. The load receiving platform lifting device according to claim 1 or claim 2, further comprising an engagement / disengagement detection portion configured to detect at least one of a state where the first engaging portion is engaged with the retractable portion and the moving body and a state where the first engaging portion is disengaged from the retractable portion and the moving body. The load receiving platform lifting device according to claim 1 or claim 2.

4. The load receiving platform lifting device according to claim 2, wherein the first engaging portion and the second engaging portion are constituted by a single common member, and the common member is detachably engageable with the retractable portion and the moving body and is also detachably engageable with the retractable portion and the outer column. The load receiving platform lifting device according to claim 2.

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