JP2016084012A - Loading space support leg for truck and truck having the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a loading space support leg for a truck and the truck having the same, having high reliability, while restraining manufacturing cost.SOLUTION: A loading space support leg 60 comprises a support leg roller 61 for grounding on the ground surface, a link mechanism connected around a shaft of turning a pivot place to the one's own vehicle width direction and an undulation switching mechanism for rotating the link mechanism by the slide movement of a loading space. The link mechanism comprises a support leg frame 62 for supporting a support leg roller, an upper side support leg link 66 for connecting the upper side of the support leg frame and a body frame 110 and a lower side support leg link 67 for connecting the lower side of the support leg frame and a chassis frame 2, and the upper side support leg link is a link for freely switching to a rigid link state for holding a distance between a support leg frame side connection point 68a connected to the support leg frame and a body frame side connection point 69a connected to the body frame 110 and a deformation link state of changing a distance between the support leg frame side connection point 68a and the body frame side connection point 69a.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a loading platform support leg that can be suitably used for a truck that slides the loading platform to the rear of the host vehicle and unloads the loading platform substantially horizontally to the ground behind the own vehicle for loading and unloading cargo such as vehicles. It relates to a lorry equipped with.

  In this type of truck, it is necessary to prevent the loading platform that is slid rearward from being supported in a cantilever manner behind the host vehicle. Therefore, this type of lorry is provided with a platform support leg in order to prevent the platform from being cantilevered behind the host vehicle before the platform ground roller at the rear end of the platform is grounded.

However, when the loading platform is lowered substantially horizontally to the ground behind the host vehicle, the loading platform support legs must be stored between the ground and the loading platform. Further, after the load carrier grounding roller at the rear end of the carrier is brought into contact with the ground, the cantilever state is canceled, so that support by the carrier support legs is unnecessary. For this reason, this kind of cargo vehicle carrier support leg has a folding mechanism.
As a loading platform support leg having a folding mechanism, for example, a technique described in Patent Document 1 is known. In the technique described in this document, the loading platform support leg has a four-link parallel link mechanism, and a structure in which the parallel link mechanism is folded by a hydraulic cylinder is adopted.

JP 2011-105214 A (FIG. 4)

However, the technology described in Patent Document 1 requires a hydraulic cylinder as an actuator dedicated to driving because the load carrier support leg has a structure in which a four-bar parallel link mechanism is folded by a hydraulic cylinder. Therefore, there is a problem that the manufacturing cost becomes high, and ancillary equipment such as piping for driving the hydraulic cylinder is separately required. Further, it is necessary to consider the reliability of the hydraulic circuit etc. of these ancillary equipment. There is a problem.
Therefore, the present invention has been made paying attention to such problems, and this kind of cargo vehicle includes a cargo bed support leg for a cargo vehicle having high reliability while suppressing manufacturing cost. The purpose is to provide a truck.

  In order to solve the above-described problem, a cargo carrier loading platform support leg according to an aspect of the present invention is used in a cargo vehicle including a loading platform that is provided so as to be tiltable and slidable on a chassis frame of the host vehicle and is lowered to the ground. A loading platform support leg that supports the loading platform by contacting the ground when sliding the loading platform to the rear of the host vehicle, wherein the loading platform support leg includes a supporting leg roller that contacts the ground and the support A link mechanism that is provided on the back side of the cargo bed so that the leg roller can rotate and is connected around an axis that faces the width direction of the host vehicle, and a link mechanism that is connected to the chassis frame. And a undulation switching mechanism for rotating the link mechanism by sliding movement of the cargo bed, the link mechanism supporting the support leg roller. A leg frame, an upper support leg link connecting the upper side of the support leg frame and the main body frame, and a lower support leg link connecting the lower side of the support leg frame and the chassis frame, At least one of the upper support leg link and the lower support leg link is a rigid link that maintains a distance between a support leg frame side connection point connected to the support leg frame and a main body frame side connection point connected to the main body frame. And a deformable link state in which the distance between the support leg frame side connection point and the main body frame side connection point changes, and the undulation switching mechanism is configured such that the loading platform is placed on the chassis frame. In the retracted position, the support leg frame is positioned at a position where the support leg roller is in a retracted position separated from the ground, and the loading platform is slid. When the carrier is in a cantilever support state behind the host vehicle, the support leg frame is raised to a position where the support leg roller contacts the ground, and the upper support leg link and the lower The switchable link among the side support leg links is switched to the rigid link state, and the support leg frame is supported by the upper support leg link and the lower support leg link from the front-rear direction of the host vehicle. The switchable link of the upper support leg link and the lower support leg link is switched to the deformed link state after the load carrier grounding roller at the rear of the cargo bed is in a grounded state, and the entire link mechanism is supported by the entire link mechanism. The lying posture is folded together with the leg roller in a direction away from the ground.

  In order to solve the above-described problem, a cargo vehicle according to an aspect of the present invention is provided with a loading platform that is tiltably and slidably movable on a chassis frame of the host vehicle and is lowered onto the ground. A cargo vehicle including a cargo bed support leg that touches the ground and supports the cargo bed when sliding backward, wherein the cargo bed carrier leg according to an aspect of the present invention is provided as the cargo bed support leg. It is characterized by.

According to the present invention, since a desired folding operation is possible while having a simple configuration that does not require a dedicated actuator, it is possible to stably and reliably perform a desired operation while suppressing manufacturing costs. A highly reliable platform support leg for a truck can be provided.
In the grounding posture of the support leg frame with the support leg roller grounded to the ground, the upper support leg link and the lower support leg link of the link mechanism support the support leg frame from the vehicle front-rear direction. Even if added, the standing state of the support leg frame can be reliably maintained.

Here, the undulation switching mechanism has a connecting rod that connects the link mechanism and the chassis frame side of the host vehicle, and the connecting rod changes the posture of the link mechanism by the action of sliding movement of the cargo bed. By doing so, the supporting leg main body can be switched to a necessary position at a desired timing without using a dedicated actuator such as a hydraulic cylinder.
The switchable link of the upper support leg link and the lower support leg link includes a first divided link having the support leg frame side connection point at one end and the main body frame side connection point at one end. A second split link, and a connecting portion that connects the other end portions of the first split link and the second split link around an axis that faces the width direction of the host vehicle. The bifurcated link is in the rigid link state by linearly extending the first divided link and the second divided link, and the first divided link and the second divided link are folded around the connecting portion as a rotation center. Therefore, when the bifurcated link is in the rigid link state, the support leg frame is reliably supported, and when in the deformed link state, the lying posture is facilitated. .

  The link mechanism includes a rotation transmission rod that extends and is fixed to the body frame side connection point in the vehicle width direction and is rotatable in both forward and reverse directions, and a direction in which the cargo bed moves from the rotation transmission rod. The undulation switching mechanism is provided with a first link pressing portion on the loading platform, and the loading platform grounding roller at the rear of the loading platform is grounded when the loading platform slides. After the state is reached, the first link pressing portion presses the deformed link switching portion, so that the rotation transmission rod rotates in the forward direction. When the second divided link rotates in the direction of the deformed link state, the operation of the two-divided link in the deformed posture becomes easy.

  Further, the link mechanism includes a rigid link switching unit that protrudes in a direction in which the cargo bed moves at an axial position of the rotation transmission rod different from the deformed link switching unit, and the undulation switching mechanism is provided on the cargo bed. A second link pressing portion is provided, and the second link pressing portion is moved to the rigid link switching portion when the loading platform grounding roller at the rear portion of the loading platform slides toward the chassis frame. When the second transmission link is rotated in the direction in which the two-division link is in the rigid link state due to rotation of the rotation transmission rod in the reverse direction, When the slide slides toward the chassis frame and the support leg frame is in the grounding posture, the bifurcated link is reliably switched to the rigid link state. Rukoto can.

  As described above, according to the present invention, it is possible to provide a truck bed support leg for a truck with high reliability and a truck equipped with the same while suppressing the manufacturing cost. In the grounding posture of the support leg frame with the support leg roller grounded to the ground, the upper support leg link and the lower support leg link of the link mechanism support the support leg frame from the vehicle front-rear direction. Even if added, the standing state of the support leg frame can be reliably maintained.

1 is a left side view of a vehicle transporter that is an embodiment of a cargo vehicle including a cargo carrier support leg according to the present invention. The figure shows the storage position of the loading platform in the traveling state. It is the schematic diagram which decomposed | disassembled and showed the movement mechanism part of the loading platform raising / lowering apparatus of FIG. It is the perspective view which looked at the part of the loading platform support leg with which the loading platform raising / lowering apparatus of FIG. 1 was equipped from the upper side ahead of the vehicle. It is the perspective view which looked at the part of the platform support leg with which the platform lifting apparatus of FIG. 1 was equipped from the vehicle rear upper side. It is a top view which shows the part of a loading platform support leg. It is a left view which shows the part of a loading platform support leg. It is a rear view which shows the part of a loading platform support leg. It is a figure ((a)-(e)) explaining operation | movement of the vehicle transport vehicle of FIG. 1, The figure (a) shows the slide movement initial stage attitude | position (a carrier grounding roller is before grounding), (b) Indicates the initial tilted position when the loading platform is further retracted (when the loading platform grounding roller is in contact with the ground), (c) indicates the state where the loading platform is further retracted (the loading platform grounding roller is grounded), and (d) is the sliding movement posture of the loading platform. (Folding of the loading platform support leg), (e) further shows the boarding position where the loading platform is lowered to the ground behind the host vehicle. FIG. 2 is a diagram ((a) to (e)) for explaining the operation of a part of a loading platform support leg in FIG. 1, in which FIG. 1 (a) shows a posture of the loading platform at a storage position, and FIG. (C) shows the posture when the carrier is further retracted, the bifurcated link is in the initial stage of deformation, and the support leg roller is in the grounding state, and (d) shows the posture when the carrier is grounded. Is further retracted after contact with the ground and shows the folding of the platform support legs, and (e) shows the posture at the boarding position where the platform is lowered to the ground behind the host vehicle. The operation | movement which makes the two division | segmentation link which comprises a link mechanism a rigid link state in the middle of the load carrier which was in the grounding state sliding toward the chassis frame is shown.

Hereinafter, a vehicle carrier according to an embodiment of a truck according to the present invention will be described with reference to the drawings as appropriate.
As shown in FIG. 1, the vehicle carrier 1 includes a loading platform 3 on a chassis frame 2. A so-called torii gate 5 is integrally provided at the front portion of the loading platform 3, and a rear turn 4 is provided at the rear portion of the loading platform 3. The rear turn 4 is attached so as to be rotatable in the front-rear direction of the host vehicle, and is in a vertical closed position shown in the figure and an open position that becomes a slope when the vehicle is turned backward and enters the vehicle (FIG. 8 (e ))) Can be located in each.

This vehicle carrier 1 is equipped with a platform lifting device 10 between the platform 3 and the chassis frame 2. In addition, on the lower side of the rear part of the loading platform 3, a retractable loading platform support leg 60 is provided.
Hereinafter, the loading platform lifting device 10 will be described. FIG. 2 is an exploded schematic view showing a part of the platform lifting device 10 of FIG.
As shown in FIG. 2, the loading platform 3 has loading platform vertical joists 6 on both sides in the vehicle width direction. The bed vertical joist 6 is a long member in the shape of a grooved steel, and is disposed so as to face the concave groove side of the grooved steel inward in the width direction. A load carrier grounding roller 50 is provided at the lower end of the rear end of the cargo bed 3. The loading platform grounding roller 50 abuts the ground GL when the loading platform 3 is lowered to the rear of the host vehicle, and assists the movement in the sliding movement direction (also the front-rear direction of the own vehicle). A loading platform receiving roller 54 is attached to the rear end of the chassis frame 2. The loading platform receiving roller 54 supports the loading platform 3 slidably moved from below.

  The loading platform elevating device 10 includes a moving mechanism that moves the loading platform 3. By this moving mechanism, the loading platform 3 is stored on the chassis frame 2 (see FIG. 1), and the loading platform 3 is moved from the storage location K. It is configured to be slidable to a boarding position N (see FIG. 8 (e)) that is lowered behind the host vehicle to a position substantially horizontal to the ground GL. As a result, the vehicle transport vehicle 1 can load the vehicle on the loading platform 3 at the boarding position N and can transport the loaded vehicle with the loading platform 3 stored in the storage position K. In addition, if the loading platform grounding roller 50 is in a grounded state, the stacking itself is possible.

  Specifically, as shown in FIG. 2, in the platform lifting device 10, a guide rail 11 is attached on the chassis frame 2, and the platform 3 is placed on the guide rail 11 via a moving frame 20. Further, the loading platform elevating device 10 includes a front cylinder 30 and a rear cylinder 40 as a drive mechanism for sliding the moving frame 20 and the loading platform 3. The front cylinder 30 and the rear cylinder 40 have a center trunnion structure in which a middle portion of the tube is pivotally supported.

  In the front cylinder 30, the tip of the rod 32 is pivotally supported by the front portion 8 a of the chassis frame 2, and an intermediate portion (hereinafter, pivoted portion) 36 of the tube 34 is pivotally supported by the intermediate portion 20 b of the moving frame 20. ing. The rear cylinder 40 has a rod 42 whose tip is pivotally supported by the rear portion 3 a of the loading platform 3, and an intermediate portion (hereinafter, pivotal portion) 46 of the tube 44 is pivotally supported by the rear portion 20 a of the moving frame 20. Yes. Then, the loading platform 3 or the moving frame 20 is moved according to the expansion and contraction of the two hydraulic cylinders of the front cylinder 30 and the rear cylinder 40, whereby the loading platform 3 is moved from the storage position K stored on the chassis frame 2 to the vehicle. It can move to the boarding position N where the loading platform 3 is lowered.

  On the chassis frame 2, a base frame 8 serving as a base for fixing the loading platform elevating device 10 is fixed. The above-described guide rail 11 is integrally connected to the base frame 8 and attached to a position on the chassis frame 2 at the rear of the vehicle. The guide rail 11 is a long guide member in the form of a grooved steel provided in a pair on both sides in the vehicle width direction, and faces the groove side of the grooved steel serving as the guide groove toward the inside in the width direction. Has been placed. Each guide rail 11 is curved so that the front end portion and the rear end portion are directed downward, so that the side view is formed in a substantially “h” shape. In order from the front side), a front inclined portion (not shown), a horizontal portion 14, a rear first inclined portion 16, and a rear second inclined portion 18 are configured.

  The moving frame 20 is formed in a substantially ladder-like frame body in plan view, and includes a pair of front rollers 21 and a rear roller 22 that are spaced apart in the vehicle front-rear direction on both sides of the rear portion thereof. The moving frame 20 is slidably fitted in the groove of the guide rail 11 by the pair of front rollers 21 and rear rollers 22. The front roller 21 is provided on the front side of the vehicle in the sliding direction, and is attached to the tip of an arm portion that protrudes downward in the vehicle. The rear roller 22 is provided on the rear side of the vehicle in the sliding direction, and is directly attached to the moving frame 20 portion, unlike the front roller 21, and is thus positioned above the front roller 21 in the vertical direction of the vehicle. ing.

  The front roller 21 and the rear roller 22 protrude from the outer surface of the moving frame 20 toward the outside in the width direction, and can be rotated around the axis via a support shaft that faces the vehicle width direction. The front roller 21 and the rear roller 22 are fitted in the substantially U-shaped grooves of the pair of guide rails 11 described above and supported so as to be able to roll, and move along the guide rails 11. The slide movement of the frame 20 is smoothly guided.

A pair of moving frame rails 24 are fixed to the moving frame 20 on both sides in the vehicle width direction. Each moving frame rail 24 is a long steel channel-shaped guide member, and supports a front loading platform roller 52 provided on both front sides of the loading platform 3 so as to be able to roll along the moving frame rail 24. Thus, the sliding movement of the loading platform 3 is smoothly guided.
In the storage position K described above, the front roller 21 is located on the front inclined portion (not shown) of the guide rail 11, and the rear roller 22 is located on the horizontal portion 14 of the guide rail 11. Therefore, in the storage position K, the moving frame 20 is substantially horizontal on the chassis frame 2, and the attitude of the loading platform 3 is also supported horizontally. When the loading platform 3 moves, the loading platform front roller 52 is guided by the moving frame rail 24 and moves rearward. Thereafter, the front roller 21 and the rear roller 22 slide along the shapes of the inclined portions 14, 16 and 18 of the guide rail 11 described above. As a result, the platform lifting device 10 supports the platform 3 while moving and tilting it so that the platform 3 on the moving frame 20 is lowered to the height required for lowering the platform 3 to the rear of the host vehicle, so that the platform 3 is substantially horizontal on the ground. It can be taken down.

As shown in FIG. 1, the vehicle transport vehicle 1 is provided with a vertically movable loading platform support leg 60 at the rear portion of the chassis frame 2.
The loading platform support leg 60 supports the loading platform 3 by grounding the supporting leg roller 61 to the ground when the loading platform 3 is slid to the rear of the host vehicle. Specifically, as shown in FIG. 1, the load carrier support leg 60 includes a support leg roller 61 that contacts the ground, a support leg frame 62 that supports the support leg roller 61, and the support leg frame 62. A link mechanism 80 in which all of the pivotal support portions are connected around an axis that faces the vehicle width direction so that the support leg frame 62 can be rotated, and a undulation that rotates the link mechanism 80 by the action of sliding movement of the loading platform 3. And a switching mechanism. Each frame and link member constituting the loading platform support leg 60 is manufactured using a rectangular metal cross section or a rectangular metal cross section.

  The load carrier support leg 60 rotates the support leg frame 62 about an axis facing the width direction of the host vehicle by the up-and-down switching mechanism, so that the support leg roller 61 is separated from the ground in the retracted posture R (FIGS. 1, 6 and 6). 9 (a)) and a grounding posture S (FIGS. 8 (a), 8 (b), 9 (9)) projecting downward from the back surface of the cargo bed 3 so as to ground the support leg roller 61 to the ground. b)), and after the loading grounding roller 50 at the rear end of the loading platform 3 is in a grounded state, the entire link mechanism 80 and the supporting leg roller 61 are folded in a direction away from the ground. 8 (e) and 9 (e)) can be switched to the respective postures.

Hereinafter, the loading platform support leg 60 will be described in more detail with reference to FIGS. 3 to 7 as appropriate.
As shown in FIGS. 3 and 4, the cargo bed support leg 60 has a main body frame 110. The main body frame 110 has a substantially U-shape when viewed from the front, and has a pair of left and right vertical frames 111 facing the vehicle vertical direction, and a horizontal frame 112 connecting the lower ends of the pair of vertical frames 111 in the vehicle width direction. .

  Guide rollers 113 are arranged on the outer surface side in the vehicle width direction of the upper end portions of the pair of vertical frames 111, and these guide rollers 113 are internally fitted so as to be guided by the recessed grooves of the cargo bed vertical joists 6. . As a result, the main body frame 110 is supported on the loading platform 3 side via the pair of guide rollers 113, and slides relative to the sliding movement of the loading platform 3 by the rolling of the pair of guide rollers 113. .

A fixed base 114 protruding outward in the vehicle width direction is fixed to the lower part of the pair of left and right vertical frames 111 of the main body frame 110. The vertical frame is attached to the rod turning arms 115 and 116 provided on the fixed base 114. A rotation transmission rod 81 extending in the vehicle width direction on the rear side of the vehicle from 111 is supported so as to be rotatable about an axis.
The support leg frame 62 has a pair of left and right vertical support leg frames 63 facing the vehicle vertical direction, and a horizontal support leg frame 64 that connects the lower ends of the pair of vertical support leg frames 63 in the vehicle width direction. The vertical support leg frame 63 supports the support leg roller 61 at its lower end and supports the first rolling roller 65 at its upper end.

The support leg frame 62 configured as described above is disposed on the vehicle front side of the main body frame 110, and has an upper support leg link 66 having a two-part link structure that connects the rotation transmission rod 81 and the upper side of the support leg frame 62; A lower support leg link 67 connected to the lower side of the support leg frame 62 and extending to the front side of the vehicle is rotatably supported.
As shown in FIG. 6, the upper support leg link 66 has a lower end portion of the upper first divided link 68 and an upper end portion of the lower second divided link 69 connected to each other by a connecting support shaft 70. ing. The upper end of the first divided link 68 is pivotally connected to the upper side of the vertical support leg frame 63 of the support leg frame 62 via a connecting point 68a, and the lower end of the second divided link 69 connects the connecting point 69a. Via the rotation transmission rod 81. Here, the support leg frame side connection point according to the present invention corresponds to the connection point 68a, and the main body frame side connection point according to the present invention corresponds to the connection point 69a.

  A support leg restricting plate 71 having a substantially U-shaped cross section for restricting the folding direction of the upper and lower links 68 and 69 is integrally mounted on the second split link 69 side at the position of the connecting support shaft 70. . The support leg restricting plate 71 has a restricting surface (substantially U-shaped bottom surface portion) on which the surfaces of the links 68 and 69 are flush with each other on the side surfaces facing the upper side of the upper and lower links 68 and 69. Thus, the folding to the side facing the upper side is impossible, and only the folding operation to the opposite side is allowed.

  As shown in FIG. 4, the lower support leg link 67 is fixed to the first frame 72 extending in the vertical direction and the lower end side of the first frame 72 via the connection plate 73, and the first frame 72 72, a second frame 74 extending rearward in the direction substantially perpendicular to the vehicle 72, a second rolling roller 75 supported by the upper end of the first frame 72, a tip of the second frame 74, and A rear pivot portion 67u connected to the lower side of the vertical support leg frame 63 of the support leg frame 62 and a front pivot portion 67m provided on the lower side of the first frame 72 are provided.

As shown in FIG. 5, the front pivotal support portion 67m of the lower support leg link 67 is pivotally supported by a guide frame 2a that is integrated with the chassis frame 2 and extends in the vehicle width direction.
As described above, the lower end portion of the second divided link 69 of the upper support leg link 66 is fixed to the rotation transmission rod 81. However, as shown in FIG. A first stay 76 is fixed to the outside in the vehicle width direction, and a third rolling roller 77 is supported on the upper end portion of the first stay 76. A second stay 78 is fixed to the inner side in the vehicle width direction from the upper support leg link 66 of the rotation transmission rod 81, and a fourth rolling roller 79 is supported on the upper end portion of the second stay 78. Here, the fourth rolling roller 79 overlaps with the first rolling roller 65 provided at the upper end of the vertical support leg frame 63 of the support leg frame 62 in the vehicle width direction position.

  Further, a biasing spring 117 formed by a torsion coil spring is engaged with the rotation transmission rod 81, and an action of the biasing spring 117 causes a counterclockwise biasing force to be applied to the rotation transmission rod 81 in FIG. Accordingly, the upper support leg link 66 of the two-part link structure is always urged to the side where the first part link 68 and the second part link 69 are in a straight line.

Thus, the link mechanism 80 of the present embodiment is fixed to the main body frame 110, the support leg frame 62, the upper support leg link 66, the lower support leg link 67, the rotation transmission rod 81, and the rotation transmission rod 81. The first stay 76 and the third rolling roller 77, the second stay 78 and the fourth rolling roller 79 are configured.
The deformed link switching portion of the link mechanism according to the present invention corresponds to the first stay 76 and the third rolling roller 77, and the rigid link switching portion of the link mechanism according to the present invention is the second stay 78 and the fourth rolling roller. It corresponds to the roller 79.

Furthermore, the platform support leg 60 of the present embodiment rotates the link mechanism 80 by the sliding movement of the platform 3 by the operation of the undulation switching mechanism in order to shift the platform ground roller 50 to the above-described lying posture T after the ground contact. Let
The undulation switching mechanism is fixed to the lower surface of the vehicle front side of the loading platform vertical joists 6 constituting the loading platform 3 as illustrated in FIGS. 1 and 2, as shown in FIGS. The front striker 102, the rear striker 103 fixed to the lower surface of the loading platform vertical joist 6 on the rear side of the vehicle, and the lower surface of the loading platform vertical joist 6 in the vehicle longitudinal direction at a position between the front striker 102 and the rear striker 103. And a front inclined portion 105 of the roller receiving member 104 that is extended and fixed.

The undulation outer rod 92 is disposed on the outermost side in the vehicle width direction of the main body frame 110, and the undulation inner rod 94 is disposed on the innermost side in the vehicle width direction.
The undulation outer rod 92 and the undulation inner rod 94 are separated from each other in the vehicle width direction to form a pair, and the inner undulation inner rod 94 is equally distributed on the left and right of the central rear cylinder 40 provided on the back surface of the loading platform 3. A pair is provided. Both ends of these two sets of undulating rods 92 and 94 are pivotally supported by the main body frame 110 so as to be rotatable around an axis facing the vehicle width direction.

The pivoting position of the end portion of the undulating inner rod 94 is provided so as to have the intended storage posture R at the storage position K in FIG.
That is, at the time of traveling, the front pivotal portion 94m of the undulating inner rod 94 is lower than the front pivotal portion 92m of the undulating outer rod 92 in the vehicle longitudinal direction so that the main body frame 110 is at a right angle to the back surface of the loading platform 3. The rear pivot portion 94u of the undulation inner rod 94 is pivoted at a position higher than the rear pivot portion 92u of the undulation outer rod 92.

  Further, the length of the undulation inner rod 94 is shorter than the length of the undulation outer rod 92, and the pivot position of each of the undulation rods 92, 94 in the vehicle longitudinal direction is the front pivot portion 94m of the undulation inner rod 94. Is pivotally supported at a position rearward of the vehicle with respect to the front pivot portion 92m of the undulating outer rod 92, and the rear pivot portions 92u and 94u of the rods 92 and 94 are pivotally supported at substantially the same position in a side view.

  The rear striker 103 constituting the undulation switching mechanism is positioned below the second rolling roller 75 of the lower support leg link 67 when the support leg roller 61 is in the retracted posture R isolated from the ground. Then, the lower support leg link 76 is rotated counterclockwise around the front pivot part 67m in FIG. 6, and the rear pivot part 67u of the second frame 72 is moved upward to raise the support leg frame 62.

  When the loading platform 3 slides toward the chassis frame 2 from the state in which the loading platform grounding roller 50 is in the grounded state, the front inclined portion 105 of the roller receiving member 104 is fixed to the rotation transmission rod 81. The fourth rolling roller 79 of the second stay 78 is pressed, and the counterclockwise rotation in FIG. 6 is transmitted to the rotation transmission rod 81 so that the first divided link 68 and the second divided link 69 of the upper support leg link 66 are mutually connected. Is linear (the rigid link state of the present invention).

  In addition, after the load carrier grounding roller 50 at the rear end of the cargo bed 3 is brought into the grounded state, the first striker 102 of the undulation switching mechanism that moves from the front of the vehicle to the rear of the vehicle is fixed to the rotation transmission rod 81. By pressing the third rolling roller 77 of 76, the rotation in the clockwise direction in FIG. 6 is transmitted to the rotation transmission rod 81, and the upper support leg link 66 of the two-split link structure has the first split link 68 and the second split link 66. The divided link 69 is folded (the deformed link state of the present invention).

The first link pressing portion of the undulation switching mechanism according to the present invention corresponds to the front striker 102, the second link pressing portion of the undulation switching mechanism according to the present invention corresponds to the front inclined portion 105 of the roller receiver 104, The connecting rod according to the present invention corresponds to the undulation outer rod 92 and the undulation inner rod 94.
Next, the movement operation of the loading platform lifting device 10, the operation of the retractable loading platform support leg 60 and the operation and effect thereof will be described with reference to FIGS. 1, 8 and 9 as appropriate.

  When the vehicle carrier 1 is in a traveling state, the loading platform 3 is in the storage position K stored on the chassis frame 2 as shown in FIG. When the loading platform 3 is in the retracted position K, the main body frame 110 of the loading platform support leg 60 is in the retracted posture R that projects downward at a right angle with respect to the loading platform 3 as shown in FIG. At this time, the second rolling roller 75 of the lower support leg link 67 comes into contact with the lower part of the rear striker 103 of the undulation switching mechanism, so that the lower support leg link 76 in FIG. Rotating counterclockwise about 67m, the rear pivot portion 67u of the second frame 72 moves upward, and the support leg frame 62 is raised. As described above, the lower support leg link 76 is engaged with the rear striker 103 provided on the loading platform 3 in the retracted posture R to raise the support leg frame 62, so that the ground height on the rear side of the vehicle is set high. The departure angle can be secured sufficiently.

  And this vehicle transport vehicle 1 drives the loading platform elevating device 10 to move the loading platform 3 from the storage position K shown in FIG. 1 to the loading position N shown in FIG. Can be taken down. At this time, the platform support leg 60 can be used as a support leg when the platform 3 is lowered to the rear of the host vehicle by the platform lifting device 10. In particular, according to the loading platform support leg 60 described above, the support leg frame 62 is moved to a required position corresponding to the retracted posture R, the ground posture S, and the lying posture T at a desired timing without using a dedicated actuator such as a hydraulic cylinder. Can be switched to.

Specifically, when the vehicle carrier 1 lowers the loading platform 3 to the rear of the vehicle and loads other vehicles as cargo, for example, as shown in FIG. The rear cylinder 40 is driven to extend the rod 42 by a predetermined amount. Thereby, the loading platform 3 is guided along the moving frame 20, and the sliding movement is started to the rear of the vehicle.
At this time, as shown in FIG. 9B, the entire body frame 110 is tilted rearward together with the loading platform 3 in the loading platform support leg 60. At this time, the lower support leg link 67 from which the contact between the rear striker 103 of the undulation switching mechanism and the second rolling roller 75 is released rotates clockwise at the front pivot portion 67m. Then, the support leg frame 62 stands up, the support leg roller 61 contacts the ground, and the roller receiving material 104 provided on the lower surface of the load bed vertical joist 6 moves on the first rolling roller 65, thereby Switching to the ground contact posture S supported at the rear of the vehicle is performed.

  The vertical support leg frame 63 of the support leg frame 62 switched to the ground contact posture S is connected to the first divided link 68 between the upper side of the vertical support leg frame 63 and the main body frame 110 as shown in FIG. And the upper support leg link 66 which made the 2nd division | segmentation link 69 mutually linear form connects, and between the lower side of the vertical support leg frame 63 and the chassis frame 2 (guide frame 2a), the lower support leg link 67 is attached. The second frame 74 is connected.

Thus, the second frame 74 of the upper support leg link 66 and the lower support leg link 67 supports the vertical support leg frame 63 from the vehicle front-rear direction, and the vertical support leg frame 63 stands up even if the weight of the loading platform 4 is added. Is securely held, the sliding movement is continued in a state where the posture of the loading platform 3 is stable.
As shown in FIG. 8 (a), the loading platform support leg 60 is in a state where the loading platform grounding roller 50 is in the grounding state as shown in FIG. 8 (b) before the loading platform grounding roller 50 at the rear end of the loading platform 3 is in the grounding state. The loading platform 3 is supported until the time becomes.

  Next, the loading platform elevating device 10 continues to extend the front cylinder 30. Thereby, the moving frame 20 moves to the horizontal portion of the guide rail 11 and is supported as the loading platform 3 moves rearward. Therefore, as shown in FIG. 8C, the entire moving frame 20 is slid horizontally to the rear of the host vehicle while maintaining the initial tilted posture, and the cargo bed 3 also moves further rearward along with this. The slide movement is continued in a state in which the posture of the loading platform 3 is stable due to contact with the ground GL.

  At this time, in the front portion of the loading platform 3, the loading platform front roller 52 is supported by the rear side of the moving frame rail 24 (see FIG. 2), and the loading platform 3 is held in a both-end supported state. Therefore, the support by the loading platform support leg 60 is not necessary from this point, but as shown in FIG. 9C, the front striker of the undulation switching mechanism provided on the loading platform vertical joist 6 of the loading platform 3 moving to the rear of the vehicle. 102 presses the third rolling roller 77 of the first stay 76 fixed to the rotation transmission rod 81, and clockwise rotation in FIG. 9C is transmitted to the rotation transmission rod 81. As a result, the first divided link 68 and the second divided link 69 constituting the upper support leg link 66 are folded.

Next, as shown in FIG. 8D, the loading platform elevating device 10 drives the front cylinder 30 to extend. As a result, while the moving frame 20 is guided along the guide rail 11, the loading platform 3 further slides and moves rearward of the vehicle with the loading platform grounding roller 50 grounded to the ground GL.
At this time, as shown in FIG. 9 (d), the loading platform support leg 60 has a lower end portion of the main body frame 100, as the guide roller 113 fitted in the recessed groove of the loading platform vertical joist 6 moves downward. Then, it rotates in the clockwise direction and is pulled up in the front direction of the vehicle, and rotates clockwise and tilts about the position of the pivotal support portion of the guide roller 113.

  As the main body frame 100 is tilted, the hoisting rods 92 and 94 whose ends are pivotally supported by the main body frame 100 move so that the cross link is folded (narrowed) depending on the height of the pivot position. To go. Therefore, the bed support leg 60 is folded in a direction away from the ground as a whole, and the lower support leg link 67 connected to the lower side of the vertical support leg frame 63 of the bed support leg 60 is also from the ground. The upper support leg link 66 that rotates in the direction of separation and is connected to the upper side of the vertical support leg frame 63 is also folded.

  Next, as shown in FIG. 8 (e), the platform lifting device 10 extends the front cylinder 30. Accordingly, the front cylinder 30 pushes the moving frame 20 further rearward, and the moving frame 20 slides and moves rearward along the guide rail 11. At this time, since the front side of the moving frame 20 is supported by the horizontal portion of the guide rail 11 and the rear side is supported by the rear inclined portion, the rear side of the moving frame 20 gradually tilts backward as it moves rearward. . As a result, the rear of the moving frame 20 as a whole is further tilted rearward downward, and accordingly, the loading platform 3 on the moving frame 20 is lowered in the direction of the ground GL, and is placed substantially horizontally with respect to the ground GL. It can be located at position N.

At this time, as shown in FIG. 9 (e), the upper support leg link 66 connected to the vertical support leg frame 63 of the loading platform support leg 60 moves to the maximum lying state. Thereby, it is lowered | hung until the loading platform 3 becomes substantially parallel to the ground.
Further, by moving the loading platform 3 from the boarding position N to the storage position K, the main body frame 110 is raised by the front striker 102 and the rear striker 103 of the undulation switching mechanism, and the upper support leg link 66 and the lower support leg link. The operation of rotating the 67 and the other link mechanism 80 so as to project the main body frame 110 downward from the back surface of the loading platform 3 downward is performed by the reverse operation to the above.

Here, FIG. 10 shows a state in which the loading platform 3 in which the loading platform grounding roller 50 is in a grounded state is slid toward the chassis frame 2.
At this time, the cross-link state of the hoisting rods 92 and 94 of the hoisting switching mechanism is opened, and the support leg frame 62 gradually rises with the downward movement due to its own weight. Normally, as the support leg frame 62 moves downward, the first divided link 68 of the upper support leg link 66 also moves downward, so that the first divided link 68 and the second divided link 69 are linear.

However, if the support leg frame 62 is not moved downward due to temporary contact with any obstacle and the upper support leg link 66 is folded, the support leg frame 62 is switched to the grounding posture S. The upper support leg link 66 cannot support the support leg frame 62.
Therefore, in the present embodiment, the front inclined portion 105 of the roller receiving member 104 constituting the undulation switching mechanism is fixed to the rotation transmission rod 81 while the loading platform 3 slides toward the chassis frame 2. The fourth rolling roller 79 of the stay 78 is pressed, and the counterclockwise rotational force is transmitted to the rotation transmission rod 81. The counterclockwise rotational force of the rotation transmission rod 81 is transmitted to the second divided link 69, so that the first divided link 68 and the second divided link 69 of the upper support leg link 66 become linear.

Therefore, even when the support leg frame 62 is switched to the grounding posture S while the cargo bed 3 is slid and moved toward the chassis frame 2, the second frames 74 of the upper support leg link 66 and the lower support leg link 67 are maintained. The vertical support leg frame 63 can be supported from the vehicle front-rear direction.
As described above, according to the vehicle transport vehicle 1 of the present embodiment, the loading platform support leg 60 can support the loading platform 3 in the middle of the rearward tilt and realize a stable sliding movement of the loading platform 3.

  And according to this loading platform support leg 60, the raising / lowering rod 92 and the raising / lowering rod 94 which comprise the raising / lowering switching mechanism work as a driving force for the sliding movement of the loading platform 3, and the raising / lowering switching of raising / lowering operation | movement. In other words, when the loading platform 3 starts to incline while retreating toward the rear of the host vehicle, the link mechanism 80 is automatically rotated in the direction of the intended posture by the operation of the hoisting outer rod 92 and the hoisting inner rod 94, and the hydraulic pressure is increased. Without using a dedicated actuator such as a cylinder, the supporting leg main body 62 can be switched to a required position according to the retracted posture R, the ground posture S, and the lying posture T at a desired timing.

Further, since the platform support leg 60 in the ground contact posture S is supported from the vehicle front-rear direction by the second frame 74 of the side support leg link 66 and the lower support leg link 67 of the link mechanism 80, the weight of the platform 4 is added. However, the standing state can be reliably maintained.
Further, when the loading platform 3 is further slid rearward while the loading platform grounding roller 50 is grounded to the ground GL, the front striker 102 provided on the loading platform 3 constituting the undulation switching mechanism constitutes the link mechanism 80. By pressing the three rolling rollers 77, the upper support leg link 66 is folded. Therefore, since the platform support leg 60 of the present embodiment has a simple configuration that does not require a dedicated actuator and can perform a desired folding operation, it can stably perform a desired operation while suppressing manufacturing costs. High reliability because it can be performed.
In addition, the carrier support leg for a truck according to the present invention and the truck equipped with the same are not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention. is there.

1 Vehicle carrier (lorry)
2 Chassis frame 2 a Guide frame 3 Loading platform 5 Torii 6 Loading platform vertical joist 8 Base frame 10 Loading platform lifting device 11 Guide rail 14 Horizontal portion 16 Rear first inclined portion 18 Rear second inclined portion 20 Moving frame 21 Front roller 22 Rear roller 24 Moving frame rail 30 Front cylinder 32 Rod 34 Tube 40 Rear cylinder 42 Rod 44 Tube 50 Cargo grounding roller 52 Cargo front roller 54 Roller 60 Cargo support leg 61 Support leg roller 62 Support leg frame 63 Vertical support leg frame 64 Horizontal support leg frame 65 First rolling roller 66 Upper support leg link 67 Lower support leg link 67m Front pivot part 67u Rear pivot part 68 First divided link 68a Connection point 69 Second division link 69a Connection point 70 Connection support shaft (connection part)
71 Support leg regulating plate 72 First frame 73 Connecting plate 74 Second frame 75 Second rolling roller 76 First stay 77 Third rolling roller 78 Second stay 79 Fourth rolling roller 80 Link mechanism 81 Rotation transmission rod 92 Hoisting outer rod 94 Hoisting inner rod 102 Front striker (first link pressing part)
103 Rear striker 104 Roller receiving member 105 Front inclined portion (second link pressing portion)
110 Body frame 111 Vertical frame 112 Horizontal frame 113 Guide roller 114 Fixing base 115, 116 Rod rotating arm 117 Biasing spring GL Ground K (loading platform) storage position N (loading platform) loading position R (loading platform support leg) Storage posture S (Loading platform support leg) Grounding posture T (Loading platform support leg) Lodging posture

Claims (6)

It is used in a truck that is provided on a chassis frame of the own vehicle so as to be tiltable and slidable and has a cargo bed that is lowered to the ground. When the cargo bed is slid to the rear of the own vehicle, the ground is grounded to the ground. A load carrier support leg that supports
The carrier support legs are
A support leg roller that contacts the ground;
A link mechanism that is provided on the back side of the loading platform so that the support leg roller is rotatable, and all of the pivotal support portions are connected around an axis that faces the vehicle width direction;
A body frame coupled to the chassis frame to support the link mechanism;
A undulation switching mechanism for rotating the link mechanism by sliding movement of the cargo bed,
The link mechanism is
A support leg frame for supporting the support leg roller;
An upper support leg link connecting the upper side of the support leg frame and the main body frame;
A lower support leg link connecting the lower side of the support leg frame and the chassis frame;
At least one of the upper support leg link and the lower support leg link has a rigidity that maintains a distance between a support leg frame side connection point connected to the support leg frame and a main body frame side connection point connected to the main body frame. A link that is switchable between a link state and a deformed link state in which the distance between the support leg frame side connection point and the main body frame side connection point changes,
The undulation switching mechanism is
When the loading platform is in the storage position on the chassis frame, the support leg frame is positioned at a position where the support leg roller is in a storage posture separated from the ground,
When the loading platform slides and the loading platform is in a cantilever support state behind the host vehicle, the support leg frame is raised to a position where the support leg roller comes into contact with the ground, and the upper support leg is Of the links and the lower support leg link, the switchable link is switched to the rigid link state, and the upper support leg link and the lower support leg link support the support leg frame from the front-rear direction of the host vehicle,
The sliding link of the upper support leg link and the lower support leg link is switched to the deformed link state from the upper support leg link and the lower support leg link after the loading platform grounding roller at the rear of the loading platform is in a grounded state during the sliding movement of the loading platform, A pedestal support leg for a lorry, wherein the entire link mechanism is folded in the direction of separating from the ground together with the support leg roller.   The undulation switching mechanism has a connecting rod that connects the link mechanism and the chassis frame side of the host vehicle, and the connecting rod changes the posture of the link mechanism by the action of sliding movement of the cargo bed. The cargo bed support leg for a truck according to claim 1. Of the upper support leg link and the lower support leg link, the switchable link has a first divided link having the support leg frame side connection point at one end and the body frame side connection point at one end. A second divided link and a connecting portion that connects the other ends of the first divided link and the second divided link around an axis facing the vehicle width direction;
The bifurcated link is in the rigid link state by linearly extending the first divided link and the second divided link, and the first divided link and the second divided link are rotated around the connecting portion. The cargo bed support leg for a truck according to claim 1 or 2, wherein the deformed link state is achieved by being folded. The link mechanism extends in the width direction of the host vehicle and is fixed to the connecting point on the main body frame side and is rotatable in both forward and reverse directions, and protrudes in a direction in which the loading platform moves from the rotation transmission rod. A deformed link switching unit provided,
The undulation switching mechanism is provided with a first link pressing portion on the loading platform,
The rotation transmission rod rotates in the forward direction by the first link pressing unit pressing the deformed link switching unit after the loading platform grounding roller at the rear of the loading platform is in a grounded state at the time of sliding movement of the loading platform, 4. The platform support leg for a truck according to claim 3, wherein the rotation of the rotation transmission rod rotates the second divided link in a direction in which the two-divided link is in the deformed link state. The link mechanism includes a rigid link switching unit that protrudes in a direction in which the loading platform moves at an axial position of the rotation transmission rod different from the deformation link switching unit,
The undulation switching mechanism is provided with a second link pressing portion on the loading platform,
When the loading platform grounding roller at the rear of the loading platform is in a grounded state, the second link pressing portion presses the rigid link switching portion when the loading platform slides toward the chassis frame, so that the rotation transmission rod 5. The cargo according to claim 4, wherein the second divided link is rotated in a direction in which the two-divided link is in the rigid link state by rotating in a reverse direction. Car bed support legs. A loading platform that is tiltably and slidable on the chassis frame of the host vehicle and is lowered to the ground; and a loading platform support leg that contacts the ground and supports the loading platform when the loading platform is slid rearward of the host vehicle. A lorry equipped with
A lorry comprising the pallet carrier support leg according to any one of claims 1 to 5 as the pallet support leg.

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