JP5581149B2 - Cargo carrier truck - Google Patents

Description

  The present invention relates to a load carrier movable transport vehicle in which a load carrier (mainly a vehicle to be transported) can be loaded and unloaded on a load carrier by moving the load carrier backward and tilting backward. In addition, the load carrier movable transport vehicle which is the subject of the present application can be applied to transport of agricultural machines, small ships (boats), heavy machinery, etc. in addition to vehicles as transport objects.

  As a publicly known example of this type of loading platform mobile vehicle, there is a vehicle transport vehicle shown in FIGS. 8 to 10 is the one disclosed in Japanese Patent Application Laid-Open No. 2008-207573 (Patent Document 1) already filed by the applicant of the present invention.

  As shown in FIG. 8, the load carrier mobile vehicle of this known example includes a vehicle 1 having a pair of left and right chassis frames 11, and guide rails 2 (a pair of left and right sides) fixed to a subframe 12 on each chassis frame 11. ), A pair of left and right inclined frames 3 supported in a tiltable manner at the rear end portion of the sub-frame 12, a loading platform 4 supported on each inclined frame 3 so as to be movable in the vehicle longitudinal direction, and the loading platform 4 tilted. A telescopic cylinder 51 that moves in the vehicle front-rear direction with respect to the frame 3 is provided, and a tilting device 5 that tilts the tilted frame 3 relative to the guide rail 2 together with the loading platform 4 by the telescopic movement of the telescopic cylinder 51 is provided.

  Each guide rail 2 is continuously formed with an upward inclined portion 21 inclined upward toward the rear at a front portion, a horizontal portion 22 at an intermediate portion, and a downward inclined portion 23 inclined downward toward a rear portion at a rear portion. .

  Each inclined frame 3 is pivotally supported (pivotally supported portion 8) so as to be tiltable on the rear end portion 13 of the subframe 12 at a position slightly rearward from the central portion in the length direction. The pivot portion 8 is obtained by pivotally supporting a bracket provided on the lower surface of the inclined frame 3 with a support shaft 83 on a bracket provided on the rear end portion of the sub frame 12.

  Downward supporting legs 9 are attached to the rear end portions of the respective inclined frames 3. As will be described later, the support legs 9 contact the ground G to support the rear end portion of the inclined frame 3 when the inclined frame 3 is in the maximum backward inclined posture (FIG. 10).

  The loading platform 4 has two left and right bottom frames (hereinafter referred to as vertical joists) 42 on the lower surface of the vehicle mounting platform 41. Grounding rollers 43 are attached to the lower surface of the rear end portion of the vehicle mounting base 41 at positions closer to the left and right outer ends, respectively. A pair of left and right edge plates 44 are attached to the rear end of the loading platform 4 so as to be freely raised and lowered.

  The moving body 6 is pivotally supported by a support shaft 64 at the front end portion of the vertical joist 42 on the bottom surface of the loading platform. The moving body 6 is movable along the inclined frame 3 and can be moved back and forth by the telescopic cylinder 51 and a chain (not shown). The loading platform 4 can be moved in the vehicle front-rear direction with respect to the inclined frame 3 via the moving body 6.

  The tilting device 5 includes left and right guide rails 2, a single telescopic cylinder 51, and tilting frame tilting rollers (hereinafter simply referred to as “rollers”) that are attached to the tube of the telescopic cylinder 51 and move along the guide rail 2. 55 (referred to as a tilting roller). The tilting roller 55 is attached to the lower end of a downward arm 54 provided on the tube 52 of the telescopic cylinder 51.

  The tilting device 5 tilts the tilting frame 3 together with the loading platform 4 by moving the tilting roller 55 back and forth along the guide rail 2 when the telescopic cylinder 51 is expanded and contracted (the tube 52 moves back and forth). At the same time, the loading platform 4 can be moved in the vehicle longitudinal direction with respect to the inclined frame 3 via the chain and the moving body 6.

  The details of this known example carrier moving transport vehicle are described in Japanese Patent Application Laid-Open No. 2008-207573. By adjusting the extension amount of the telescopic cylinder 51 from the state of storing the carrier in FIG. The loading platform 4 has two inclination angles, a normal inclination angle (about 10 °) for loading a normal vehicle height shown in FIG. 9 and a gentle inclination angle (about 6 °) for loading a low vehicle height shown in FIG. It can be set to.

  That is, when the telescopic cylinder 51 is extended from the loading platform storage state of FIG. 8, the tube 52 of the telescopic cylinder 51 moves rearward so that the tilting roller 55 moves rearward along the guide rail 2, thereby While the tilting frame 3 tilts backward together with the loading platform 4, the moving body 6 moves backward and the loading platform 4 moves rearward with respect to the tilting frame 3. As shown in FIG. 9, when the grounding roller 43 at the rear end of the loading platform is in contact with the ground G, the loading platform 4 has a normal inclination angle (about 10 °) for loading a general vehicle. As shown in FIG. 9, when the inclined frame 3 is at a normal inclination angle (about 10 °), the support leg 9 of the inclined frame 3 is not grounded, so that the inclined frame 3 is supported by the pivot portion 8 (support shaft 83). ) And the tilting roller 55 (held on the guide rail 2), but the posture is maintained, but the lower surface near the front of the loading platform 4 is still on the rear end of the subframe 12. The load on the loading platform 4 side (including the weight of the loaded vehicle S) is not applied to the inclined frame 3. Therefore, in the state of FIG. 9, even if the inclined frame 3 is in an unstable posture, the load on the loading platform 4 side does not affect the inclined frame 3.

  Further, when the telescopic cylinder 51 is further extended from the state shown in FIG. 9, the tilting roller 55 moves backward on the horizontal portion 22 of the guide rail 2 to further tilt the tilting frame 3, and the tilting roller 55 is guided. The support leg 9 comes into contact with the ground G when it is located at the entrance of the downward inclined portion 23 of the rail 2. After that, even if the telescopic cylinder 51 is extended, the tilting roller 55 moves along the descending inclined portion 23, so that only the loading platform 4 further moves backward while the tilted frame 3 maintains the maximum rearward tilting posture of FIG. When the telescopic cylinder 51 is fully extended, as shown in FIG. 10, the front end of the loading platform 4 reaches the vicinity of the rear end of the inclined frame 3 (a considerably low position), and the loading platform 4 is loaded with a low vehicle height. This is a gentle inclination angle (about 6 °).

  In the state of FIG. 10, the front end portion of the loading platform 4 is located near the rear end of the inclined frame 3 (the rear side from the pivotal support portion 8 of the inclined frame 3), and the load at the front end portion of the loading platform (the weight of the loaded vehicle S is also reduced). In the state where the support leg 9 is in contact with the ground G, the load on the front side of the loading platform applied near the rear end of the tilt frame is applied via the support leg 9. Can be supported by the ground G.

  By the way, in the well-known example of the platform-carrying transport vehicle shown in FIGS. 8 to 10, the support leg 9 at the rear end portion of the inclined frame 3 is the ground when the inclined frame 3 is in the maximum backward inclined posture (FIG. 10). G is grounded to support the load applied to the rear end of the inclined frame 3, but the length of the support leg 9 is such that the load carrier-type transport vehicle is flattened with no irregularities or steps (of the transport vehicle). It is set on the assumption that the tire contact surface and the contact surface of the support leg 9 are used at the same height.

  On the other hand, as shown in FIG. 10, when the telescopic cylinder 51 is fully extended, the tilting roller 55 reaches the rear end portion of the guide rail 2 (the rear end portion of the downward inclined portion 23). 55 has moved to a position (interval L) that is quite close to the pivot 8 of the tilt frame 3. When the support roller 9 is not in contact with the tilting roller 55 in the position close to the pivotal support portion 8 as described above, the tilting frame 3 is tilted with the pivotal support portion 8 and the tilting roller with respect to the subframe 12 side. Therefore, the supporting force when the tilting operation is applied to the tilting frame 3 is very weak.

JP 2008-207573 A

  By the way, in the loading platform mobile vehicle of the above-mentioned known example, when there is unevenness or a step on the road surface using this vehicle (for example, as shown in FIGS. 9 and 10, there is a recess Ga at the portion where the support leg 9 contacts the ground). ), The support leg 9 may not be grounded in the fully extended state of the telescopic cylinder 51 shown in FIG. 10 (the maximum backward inclined state of the inclined frame 3). In the fully extended state of the telescopic cylinder 51 shown in FIG. 10 (the maximum rearward tilted state of the tilted frame 3), the front end of the loading platform 4 is located near the rear end of the tilted frame 3, while the tilting roller 55 is It moves to the vicinity of the rear end portion of the guide rail 2 and the tilting roller 55 is at a position (interval L) that is quite close to the pivot portion 8. That is, the distance from the pivot 8 to the front end of the loading platform (support shaft 64) is several times (about 5 times) the distance (distance L) from the pivot 8 to the tilting roller 55, and as will be described later, The tilting frame rearward tilting force due to the load of the portion acts on the tilting roller 55 through the pivotal support portion 8 as an upward pushing force several times (about 5 times).

  Then, when the support leg 9 is not grounded (on the recess Ga) in the fully extended state of the telescopic cylinder 51 shown in FIG. 10, after the inclined frame due to the load (including the weight of the loaded vehicle S) applied to the front end of the loading platform. The tilting force acts as an upward pushing force against the tilting roller 55 portion (guide rail 2) via the pivot 8 (support shaft 83), and the upward pushing force is the number of tilting frame rearward tilting forces due to the load on the platform. It works twice (about 5 times).

  Therefore, in the load carrier mobile vehicle of the above known example, when the support leg 9 is not grounded during use, the tilting roller 55 and the guide rail 2 are greatly affected by the tilting frame rearward tilting force due to the load at the front end portion of the cargo bed as described above. There is a problem that these members may be damaged due to the burden.

Accordingly, the present invention provides a load carrier mobile vehicle having a guide rail attached to a chassis frame as a tilting device of the tilting frame and a tilting roller that can move along the guide rail and tilt the tilting frame. The tilting roller in the tilting device even when the rear end of the tilted frame (including the case where there is no support leg) may not come into contact with ground when the frame tilts back to the maximum rearward tilted state due to unevenness or steps on the road surface. It is intended to be Rukoto to be able to reduce the burden of in and guide rail portion.

  The present invention has the following configuration as means for solving the above problems. Note that the present invention is directed to a load carrier movable transport vehicle in which a load carrier (mainly a vehicle) can be loaded and unloaded by moving the carrier backward and tilting backward. Further, the load carrier movable transport vehicle of the present application can be applied to transport of agricultural machines, small ships (boats), heavy machinery, etc. in addition to vehicles as transport objects.

[Invention of Claim 1 of the Present Application]
According to a first aspect of the present invention, there is provided a vehicle carrier vehicle, a vehicle having a chassis frame, an inclined frame pivotally supported by a pivotal support portion at a rear end position of the chassis frame, and a vehicle longitudinal direction on the inclined frame. And a tilting device that tilts the tilting frame in conjunction with the expansion and contraction movement of the telescopic cylinder.

  The tilting device uses a guide rail attached to the chassis frame and a tilting roller that can move along the guide rail and tilt the tilting frame by the stretching motion of the telescopic cylinder.

  There are two sets of chassis frames, inclined frames, and part of the tilting device (guide rail and roller) on the left and right (vehicle width direction).

  A pair of left and right subframes can be installed on the chassis frame, but those without a subframe can also be employed. In the claims of the present application, even a frame having a subframe is expressed as a chassis frame including the subframe.

  The inclined frame is long and has a pair of left and right. And this inclination frame is supported by the pivot part (support axis) so that it can tilt freely in the rear-end part position of a chassis frame (or sub-frame).

  A grounding roller that rolls on the ground may be provided on the lower surface of the rear end of the loading platform. Moreover, the board boarding board can be attached to the rear-end part of a loading platform so that raising / lowering is possible.

  A long hydraulic cylinder is used as a telescopic cylinder for moving the loading platform back and forth. In addition, when the amount of back and forth movement of the loading platform cannot be secured sufficiently only by the expansion and contraction stroke of the expansion cylinder, the loading platform can be moved back and forth by twice the amount of expansion and contraction of the expansion cylinder using the double speed device. Can be.

  The telescopic cylinder and the tilting frame are tilted while maintaining a parallel posture.

  The tilting roller for tilting the tilting frame is attached to the tube of the telescopic cylinder 51, and the tilting roller moves along the guide rail when the telescopic cylinder expands and contracts. When the telescopic cylinder extends, the tilting roller moves rearward along the guide rail to tilt the tilting frame backward about the support shaft pivotally supported at the rear end of the chassis frame, and It is designed to move backward with respect to the inclined frame.

  When the telescopic cylinder is extended from the stowed position in which the loading platform is placed on the chassis frame, the tilting frame tilts backward and the loading platform moves rearward so that the rear end of the loading platform (with a grounding roller) contacts the ground. However, at the time when the rear end of the loading platform contacts the ground, the front portion of the loading platform is still on the rear end of the chassis frame, and the load on the loading platform hardly affects the inclined frame. After that, when the telescopic cylinder extends, the tilting roller moves further back along the guide rail and the tilting frame further tilts backward. When the telescopic cylinder is fully extended, the tilting frame tilts back to the maximum. At the same time, the front end of the loading platform is positioned behind the pivotal support (support shaft) of the inclined frame. When the telescopic cylinder is fully extended, the tilting roller is moved backward to the vicinity of the rear end of the guide rail (a position that is quite close to the pivotal support portion of the tilt frame).

  By the way, in the state where the telescopic cylinder is fully extended, the tilted frame is tilted to the maximum, but for some reason when the rear end of the tilted frame (with or without support legs) is not grounded, The inclined frame is only supported at two points: a pivot portion at the rear of the chassis frame and a tilting roller portion guided by a guide rail. In this state, since the front end portion of the loading platform is located behind the pivotal support portion of the inclined frame, the load at the front end portion of the loading platform (including the weight of the mounted vehicle) is applied to the inclined frame with a backward tilting force (inclination). It works as a pressing force at the rear of the frame. The backward tilting force on the tilting frame due to the load at the front end of the loading platform pushes up the tilting roller, but the distance from the pivot to the front end of the loading platform is several times the distance from the pivot to the tilting roller. Therefore, the tilting frame rearward tilting force due to the load at the tip of the loading platform acts as an upward push-up force several times (approximately five times) on the tilting roller portion via the pivot.

  Accordingly, when the rear end portion of the tilt frame is not in contact with the tilt frame in the maximum rearward tilt state, the support force of the tilt frame may be insufficient with respect to the load at the front end portion of the loading platform.

In the present invention Accordingly, between the front position near the high-rigidity portion of the chassis frame side of the inclined frame, and nervous state down loaded cargo bed cargo front end portion is moved to the rear from the pivot portion of the inclined frame A tension member is provided to prevent the rearward tilting posture of the tilted frame from further tilting backward. In the state where the inclined frame is tilted backward until the tension member is tensioned, the tilt frame supporting force by the guide rail and the tilting roller is not required by supporting the tilting frame backward tilting force by the front part of the loading platform with the tension member. ing. Note that a pair of left and right tension members are used.

  As the tension member, for example, a folding link in which two link members are connected in a flexible manner, a flexible rope such as a wire rope or chain (including a chain), and a telescopic rod (a rod with respect to a tube) Can be used. One end of these tension members is connected to a position closer to the front portion of the inclined frame, and the other end is connected to a highly rigid portion on the chassis frame side (or the chassis frame itself). In addition, when using a telescopic rod for the tension member, it is possible to cope with the inclined frame in a horizontal posture by attaching the tube in a state where it can fall down.

  The tension member is tensioned between the position closer to the front of the inclined frame and the highly rigid portion on the chassis frame in a state in which the load can be loaded and unloaded with the front end of the loading platform moving to the rear of the pivotal support of the inclined frame. It is set so that it does (it will not be longer).

  In this way, in the state where the tilt frame is tilted backward and the tension member is tensioned, the tilt frame backward tilting action force due to the load on the front of the loading platform can be received by the tension member. Can be reduced (the burden on the reaction force of the tilting frame rearward tilting action force). In the state where the tilting roller is moved backward until the tension member is tensioned, the tilting roller may not be supported by the guide rail portion (there is a slight gap between the tilting roller and the guide rail). May be)

  When the tilting frame returns from the backward tilted position to the horizontal position, the tension member that has been tensioned in a straight state is automatically shortened (folded when folded in two, bent when roped, reduced when stretchable. And surrender).

  In addition, in the load carrier movable transport vehicle according to the first aspect of the present invention, there may be no support leg for supporting the rear end portion of the inclined frame. In this case, the tension member is always tensioned in the maximum backward inclined state of the inclined frame. The rearward acting force of the inclined frame can be supported by the tension member.

[Invention of claim 2 of the present application]
In the invention of claim 2 of the present application, in the load carrier movable transport vehicle of claim 1, a support leg that contacts the ground is provided at the rear end portion of the inclined frame in a state in which the load carrier has moved backward to the loadable position. Is.

  This support leg is to be grounded when the tilt frame is tilted back to the maximum when the load carrier mobile vehicle is used on a flat road surface. The load can be supported by the support legs. Then, when the support leg is in contact with the tilted frame at the maximum tilted position, the above-described support by the tension member is unnecessary (a state just before the tension is sufficient).

  By the way, in the maximum rearward tilted state of the tilt frame, the road surface may be uneven or have a step, so that the support leg may not come into contact with the ground, but at that time, the tension member tensions the tension member instead of the support leg. It is possible to receive the backward tilting force of the tilt frame.

[Effect of the invention of claim 1 of the present application]
In the load carrier mobile vehicle according to the first aspect of the present invention, the front end of the load carrier has moved from the pivotal portion of the inclined frame to the rear between the position closer to the front of the inclined frame and the highly rigid portion on the chassis frame side. together are interposed tension member backward inclined posture tense inclined frame object placed down state to prevent the rearward inclination increases more, in a state in which the inclined frame is tilted backward until the tension member is tensioned in The supporting force of the tilting frame by the guide rail and the tilting roller is made unnecessary by supporting the tilting frame backward tilting force by the front part of the loading platform with the tension member.

  In the load carrier mobile vehicle according to claim 1, when the load is loaded and unloaded (in the state where the tilted frame is tilted back to the maximum), the tension member is tensioned so that the tilting member acts to tilt the tilted frame backward. Can be supported. Therefore, even if a large backward tilting force is applied to the inclined frame due to the load at the front of the loading platform in the loading and unloading work state, the subsequent tilting force can be supported by the tension member. The load can be reduced, and the tilting roller and the guide rail can be protected.

  In the maximum tilting state of the tilting frame, the tilting roller is very close to the pivot, so that the backward tilting force acts on the tilting roller part very much. Is supported by the tension member, the load on the tilting roller portion becomes very small (or the load on the tilting roller portion becomes “0”).

[Effect of the invention of claim 2 of the present application]
In the invention of claim 2 of the present application, since the support leg is provided at the rear end of the inclined frame in the load carrier mobile vehicle of claim 1, the support leg is grounded at the time of loading / unloading the load on a normal (flat ground surface). By doing so, most of the load at the front part of the loading platform applied to the rear part of the inclined frame can be received by the support legs.

  Therefore, in addition to the effect of the first aspect, in the load carrier moving transport vehicle of the second aspect, the bending force due to the load of the front part of the load platform does not act on the rear portion of the tilt frame (the rear of the tilt frame). And the tension member does not need to be tensioned to a high tension state (the tension member can be protected).

  When the support frame is not in contact with the tilted frame when it is tilted back to the maximum, the rearward acting force of the tilted frame can be received by the tension member as described in the first aspect.

It is a side view of the loading platform storage state in the loading platform mobile transport vehicle of the embodiment of the present application. FIG. 2 is a partially enlarged plan view of the loading platform mobile transport vehicle of FIG. 1. FIG. 2 is an exploded view of the loading platform mobile transport vehicle of FIG. 1. It is a partial perspective view in the disassembled state of FIG. It is VV expanded sectional drawing of FIG. FIG. 2 is a side view of a loading platform normal inclination angle state in the loading platform mobile transport vehicle of FIG. 1. FIG. 2 is a side view of a state where the loading platform is gently inclined at the loading platform mobile transport vehicle of FIG. 1. It is a side view of a well-known loading platform mobile transport vehicle. FIG. 9 is a side view of the loading platform normal inclination angle state in the loading platform mobile transport vehicle of FIG. 8. FIG. 9 is a side view of a state where the loading platform is gently inclined at the loading platform mobile transport vehicle of FIG. 8.

[Example]
Hereinafter, with reference to FIGS. 1-7, the loading platform mobile conveyance vehicle of an Example of this application is demonstrated.

  The basic structure of the load carrier mobile vehicle used in this embodiment (FIGS. 1 to 7) is that a tension member 18 described later is added to the known example shown in FIGS. 9 is substantially the same except that the structure of FIG. 9 is slightly different, and there is an overlapping part with the description of the known example, but the configuration of the load carrier moving transport vehicle of this embodiment will be described in more detail.

  As shown in FIGS. 1 to 5, the loading platform mobile vehicle of this embodiment is fixed to a vehicle 1 having a pair of left and right chassis frames 11 and 11 and subframes 12 and 12 on the chassis frames 11 and 11. Guide rails 2 and 2, a pair of left and right inclined frames 3 and 3 pivotally supported at the rear ends of the sub-frames 12 and 12, and the vehicle moves on the respective inclined frames 3 and 3 in the longitudinal direction of the vehicle. A loading platform 4 that is freely supported, and a telescopic cylinder 51 that moves the loading platform 4 in the longitudinal direction of the vehicle with respect to the inclined frames 3 and 3, and the inclined frames 3 and 3 are moved together with the loading platform 4 by the expansion and contraction of the expansion and contraction cylinder 51. A tilting device 5 that tilts with respect to the guide rails 2 and 2, a support leg 9 (a pair of left and right) provided at the rear end of each of the left and right tilt frames 3 and 3, and each tilt frame 3 as described later. 3 between the front position near the sub-frames 12 and 12 tension member 18 (located right pair) that is interposed and a is configured.

  In the description of the present embodiment, the front or front part refers to the front side of the vehicle 1, the rear or rear part refers to the rear side of the vehicle 1, and the left and right refer to the width direction of the vehicle 1. It is.

  In the loading platform mobile vehicle of this embodiment (FIGS. 1 to 5), the sub-frames 12 and 12 are fixed on the left and right chassis frames 11 and 11, respectively. The rear ends of the subframes 12 and 12 are connected by a connecting portion 13. On the upper surfaces of the sub-frames 12, 12, sliding contact plates 14 for sliding vertical joists 42, 42, which will be described later, at a plurality of positions spaced at appropriate intervals in the sub-frame length direction, 14 are attached (see FIGS. 2 and 4). In another embodiment, the chassis without the sub-frame 12 on the chassis frame 11 can be used. In this case, the sliding contact plates 14, 14,... May be mounted on the chassis frames 11, 11.

  Each of the left and right guide rails 2 and 2 uses a U-shaped frame material having a predetermined length. The guide rails 2 and 2 are fixed to the left and right sub-frames 12 and 12 in a state in which the guide rails 2 and 2 are directed in the vehicle longitudinal direction. When the subframes 12 and 12 are not used, the guide rails 2 and 2 are directly attached to the chassis frames 11 and 11.

  The shape (guide rail) of each of the guide rails 2 and 2 is set so that the tilted frames 3 and 3 can be tilted smoothly (substantially at a constant speed) when the telescopic cylinder 51 is expanded and contracted. Specifically, each of the guide rails 2 and 2 includes an upward inclined portion 21 inclined upward toward the front portion, a horizontal portion 22 at the intermediate portion, and a downward inclined portion 23 inclined downward toward the rear portion. It is formed continuously. Each guide rail 2, 2 is formed with an inward guide groove 24 over its entire length. In other embodiments, the guide grooves formed in the guide rails 2 and 2 may be outward guide grooves.

  Each of the inclined frames 3 and 3 is made of a long H-shaped steel (which may be a member having a structure in which a U-shaped material is joined back to back). Each of the inclined frames 3 and 3 has a length that is considerably longer than the entire length of the chassis frame 11. An inward guide groove 31 and an outward guide groove 32 are formed on the left and right sides of each of the inclined frames 3 and 3 over the entire length. Further, both the inclined frames 3 and 3 are connected by a connecting member 33 (FIG. 3) in the vicinity of the rear end portion in the length direction.

  Downward supporting legs 9 are attached to the rear ends of the inclined frames 3 and 3, respectively. The details of the support leg 9 will be described later.

  Each of the inclined frames 3 and 3 is pivotally supported (pivot support portion 8) so as to be tiltable on the rear connection portion 13 of the subframes 12 and 12 at a position slightly rearward from the central portion in the length direction. In this embodiment, the pivot portion 8 pivots each bracket 82 provided on the lower surface of each inclined frame 3 to each bracket 81 provided on the rear connection portion 13 of the sub frame 12 by a support shaft 83. Each of the inclined frames 3 and 3 has a retracted posture that is in a horizontal state on the chassis frames 11 and 11 (subframe 12) as shown in FIG. 1, and a pivot portion 8 as shown in FIGS. The support leg 9 can tilt with respect to the center after tilting to the ground.

  The loading platform 4 has two left and right bottom frames 42, 42 on the lower surface of the vehicle mounting platform 41. The bottom frames 42 and 42 are generally referred to as vertical joists, and in the following description, the bottom frames are referred to as vertical joists.

  The vertical joists 42 and 42 are arranged at predetermined left and right intervals from the center line of the left and right width of the vehicle platform 41. The interval between both vertical joists 42, 42 is set to be considerably wider than the interval between the both inclined frames 3, 3.

  Grounding rollers 43 are attached to the lower surface of the rear end portion of the vehicle mounting base 41 at positions closer to the left and right outer ends, respectively. The ground roller 43 may be added to the middle portion in addition to the two locations near the left and right outer ends (for example, a total of three locations). Further, a turn plate 44 is attached to the rear end portion of the loading platform 4 so as to be raised and lowered.

  A pair of left and right receiving rollers 38, 38 (FIGS. 2 to 4) for receiving the left and right vertical joists 42, 42 of the loading platform 4, respectively, are provided at the rear end portions (the brackets 81, 81) of the sub frames 12, 12. Is installed. Each of the receiving rollers 38, 38 has the bottom left and right vertical joists 42, 42 of the loading platform 4 on the bottom surface in the range from the loading platform storage state shown in FIG. 1 to the loading platform rear end (roller 43) shown in FIG. Supporting from the side, the loading platform 4 is moved in a stable state.

The tilting device 5 is attached to the guide rail 2, one telescopic cylinder 51, and the tube 52 of the telescopic cylinder 51 and moves along the inward guide grooves 24 and 24 of the guide rails 2 and 2. Each tilting roller 55, 55 is composed of rollers 59, 59 described later. In this embodiment, the rollers 59 and 59 described later are included in one of the constituent elements as the tilting device 5, but in other embodiments, the rollers 59 and 59 may not be used. The rollers 59 are removed from the components of the tilting device 5.
As shown in FIGS. 2 and 4, the tube 52 of the telescopic cylinder 51 is provided with a shaft that protrudes left and right outwards at the front end portion and the rear end portion, and a pair of left and right is provided at the tip portion of each shaft. Two sets of front and rear rollers (front rollers 57, 57 and rear rollers 58, 58) are provided. In other embodiments, the rollers 57 and 58 may be replaced with sliders (or slide plates). The telescopic cylinder 51 has a bracket 36 (see FIGS. 2 and 4) in which the tip of the cylinder rod 53 is provided at the front end of each of the inclined frames 3 and 3 with the cylinder rod 53 facing the front side. ) With a support shaft 35 (see FIG. 2), and two sets of front and rear rollers 57, 57, 58, 58 provided at front and rear ends of the cylinder tube 52 are respectively connected to the left and right inclined frames 3, 3. It is attached so as to roll along the inward guide grooves 31, 31. Accordingly, when the telescopic cylinder 51 is expanded and contracted, the cylinder tube 52 side moves with respect to the inclined frame 3, and the front and rear, left and right (total four) rollers 57, 57, 58, 58 are respectively connected to the inclined frames 3, 3 respectively. Therefore, the telescopic cylinder 51 extends and contracts while maintaining a parallel posture with respect to the inclined frame 3 in a side view.

  A pair of left and right tilting rollers 55 and 55 that are a part of the tilting device 5 are attached to the lower end portions of the short downward arms 54 and 54 at positions close to the front portion of the cylinder tube 52 in an outward state, respectively. The guide rails 2 and 2 are fitted into the inward guide grooves 24 and 24, respectively. The tilting rollers 55 and 55 are moved back and forth along the inward guide grooves 24 and 24 of the guide rails 2 and 2 when the telescopic cylinder 51 is expanded and contracted. The inclined frames 3 and 3 are tilted about the pivot 8.

  The inclination angle of the downward inclined portion 23 of the guide rail 2 is set so that the inclined frame 3 maintains a substantially constant inclination posture when the tilting roller 55 moves within the range of the downward inclined portion 23. . That is, from the time when the tilting roller 55 reaches the start end of the descending inclined portion 23 until the tilting roller 55 reaches the vicinity of the end portion of the descending inclined portion 23 as shown in FIG. This prevents the tilting operation from working.

  As shown in FIGS. 2 to 4, rollers 59 and 59 are attached to the outer surfaces of the downward arms 54 and 54, respectively. The rollers 59 and 59 are fitted into the inward guide grooves 31 and 31 of the left and right inclined frames 3 and 3, similarly to the rollers 57 and 58 attached to the front and rear of the cylinder tube 52. In this embodiment, one roller 59, 59 is inserted into each guide groove 31, 31, but two rollers 59 are arranged in front of and behind each arm 54, 54, respectively. The individual rollers 59 may be fitted into the respective guide grooves 31, 31. In this case, the arms 54 and 54 are guided in a more stable state, and the arms 54 and 54 are maintained in a stable state even when a large load is applied to the arms 54 and 54. be able to. In addition, when attaching the roller of the code | symbol 59 to each arm 54 and 54 (it may be one each at the front and back, or two each), you may abbreviate | omit each front roller shown by the code | symbol 57. FIG.

  The loading platform 4 is installed on each of the inclined frames 3 and 3 so that the double speed device A can move back and forth by an amount twice as large as the expansion / contraction amount of the expansion / contraction cylinder 51. This double speed device A is configured to have a moving body 6 and left and right chains 7,7.

  The moving body 6 connects the left and right frames 61, 61 with a connecting plate 62, and has two rollers 63, 63,. The rollers 63, 63... On the left and right sides of the moving body 6 are fitted in the outward guide grooves 32, 32 of the inclined frames 3, 3, respectively, so that the moving body 6 extends along the inclined frames 3, 3. Can move back and forth. The moving body 6 moves back and forth while maintaining a parallel posture with respect to the inclined frames 3 and 3 in a side view.

  Each of the left and right chains 7, 7 has a first divided chain 71 and a second divided chain 72 that are divided into two as shown in FIGS. In other embodiments, the chain 7 may be a single endless one. In another embodiment, a wire may be used in place of the chain 7.

  In this embodiment, the respective chains 7 and 7 are attached as follows. First, at the front end portion and the rear end portion of the tube 52 of the telescopic cylinder 51, chain pulleys (total of four) 56, 56,. In this embodiment, the pulleys 56, 56,... Are coaxially installed inside the two front and rear rollers 57, 57, 58, 58, respectively. As shown in FIGS. 3 and 4, each first divided chain 71, 71 is wound around each rear pulley 56, 56 and is connected to the front end of each first divided chain 71, 71. While fixing the portion to the connecting plate 62 of the moving body 6, the rear end portions of the first divided chains 71, 71 are fixed to the inclined frames 3, 3. Each of the other second divided chains 72 and 72 is fixed to the connecting plate 62 of the moving body 6 with the front end of each of the second divided chains 72 and 72 being wound around the front pulleys 56 and 56. On the other hand, rear end portions of the second divided chains 72 and 72 are fixed to the inclined frames 3 and 3.

  The loading platform 4 is pivotally attached to the moving body 6 at one point by a support shaft (two left and right on the same axis) 64 at a position near the front end of the loading platform. That is, in FIGS. 3 and 4, the shaft holes 64a formed in the left and right frames 61 and 61 of the movable body 6 and the shaft holes 64b formed near the front end portions of the left and right vertical joists 42 and 42 of the loading platform 4, respectively. By inserting the shaft 64 (see FIGS. 1, 2, and 5), the loading platform 4 is pivotally attached to the moving body 6 at one point in a side view.

  When the expansion / contraction cylinder 51 expands / contracts, the double speed device A causes the movable body 6 to adjust the expansion / contraction amount of the expansion / contraction cylinder 51 by the front and rear pulleys 56 and 56 and the chain 7 (first divided chain 71 and second divided chain 72). The carriage 4 is moved back and forth by a length twice as long, so that the loading platform 4 is also moved back and forth by the length of twice the expansion / contraction amount of the telescopic cylinder 51 together with the moving body 6.

  One support leg 9 is installed at each rear end of each of the left and right inclined frames 3, 3. Further, the left and right support legs 9, 9 are connected by a connecting material so that the support legs 9, 9 swing back and forth simultaneously. Since the left and right support legs 9, 9 have the same shape, the following description will be made with the left support leg 9 as viewed from the rear side of the vehicle.

  As shown in FIG. 3, the support leg 9 has an inverted L-shaped member having a lateral arm 90a facing forward and backward on the upper side and a downward leg 90b extending downward from the front end of the lateral arm 90a. 90 is used. And this support leg 9 can pivot the rear end part of the horizontal arm part 90a on the support shaft 91 (FIG. 1) on the lower surface of the rear end part of the inclined frame 3, and the downward leg part 90b can swing back and forth. It is so attached. Note that the rear end portion (pivoting portion) of the lateral arm 90a is pivoted to a bracket 39 (FIG. 3) attached to the lower surface of the connecting portion 33 that connects the rear end portions of the left and right inclined frames 3, 3. 91 is pivotally attached.

  A loading platform receiving roller 92 is provided at the corner between the lateral arm 90 a and the downward leg 90 b in the inverted L-shaped member 90. The loading platform receiving roller 92 receives (loads) the vertical joists 42 of the loading platform 4, and when the vertical loading joists 42 are placed on the loading platform receiving rollers 92, as described later, the front of the support legs 9. Side swing is prohibited.

  A grounding roller 93 is provided at the lower end portion of the downward leg portion 90 b of the inverted L-shaped member 90. The grounding roller 93 rolls in a state where it is in contact with the ground G, and makes the support leg 9 swing back and forth smoothly.

The length of the support leg 9 from the upper end of the loading platform receiving roller 92 to the lower end of the grounding roller 93 is not particularly limited, but about 50 cm is appropriate.

  As will be described later (FIG. 7), the tilted frame 3 is tilted to the downward leg portion 90b of the support leg 9 when the tilted frame 3 is tilted back to the maximum and the downward leg portion 90b of the support leg 9 is swung to the front side. A stopper 15 (FIG. 3) is attached to prevent the support leg 9 from swinging further forward by abutting against the lower surface of the support. In this embodiment, the stopper 15 is provided on the support leg 9 side. However, in other embodiments, the stopper 15 is provided on the inclined frame 3 side, and the inclined frame 3 is tilted to the maximum rearward position. (The downward leg portion 90b of the support leg 9 also swings to the maximum), and the stopper 15 on the inclined frame 3 side may abut against the support leg 9 (downward leg portion 90b).

  A rear bumper 16 is attached to the support leg 9. The support leg 9 is stored in a state where it is swung forward by the support leg storage device 10 in the loading platform storage state.

  The configurations and functions of the rear bumper 16 and the support leg storage device 10 are described in detail in Japanese Patent Application No. 2008-243831 (Japanese Patent Application Laid-Open No. 2010-58776) already proposed by the present applicant. Since there is no direct relationship with the state notification device, a detailed description of the rear bumper 16 and the support leg storage device 10 will be omitted. As a premise to make the support leg storage device 10 function, the support leg 9 needs to be able to swing forward when the loading platform 4 is in the storage position. For this purpose, the loading platform of the support leg 9 in the loading platform storage state is required. As shown in FIGS. 1 and 3, an upward concave portion (stepped portion) 42 a is provided on the lower surface of the vertical joist 42 of the loading platform at a position corresponding to the receiving roller 92.

  Next, a basic operation method of the carrier mobile vehicle used in this embodiment will be described.

  In the loading platform retracted state shown in FIG. 1, the telescopic cylinder 51 is fully reduced, and the tilting roller 55 of the downward arm 54 is in a position closer to the front portion of the guide rail 2 (in front of the upward inclined portion 21). Is in a horizontal posture, and the loading platform 4 also maintains the horizontal posture at the foremost position. When the loading platform 4 is in the retracted posture, the position of the loading platform near the front end of the vertical joists 42, 42 is supported by the movable body 6 by the support shaft 64, while the loading platform 4 is placed on the upper surface of each subframe 12, 12. The undersides of the vertical joists 42, 42 are slidably mounted.

  In order to operate the loading platform 4 to the vehicle loading posture (the loadable loading / unloading state in the claims), the telescopic cylinder 51 is extended. Then, the cylinder tube 52 moves rearward, and the tilting rollers (a pair of left and right) 55 attached to the downward arm 54 move to the horizontal portion 22 through the upward inclined portion 21 of the guide rail 2 as shown in FIG. In this way, the tilting frame 3 is tilted backward until the support leg 9 (described later) comes in contact with the ground G, and the loading platform 4 is moved backward by the double speed device A by a length twice as long as the extension of the telescopic cylinder. The ground roller 43 contacts the ground G.

  Note that the loading platform 4 maintains a parallel posture with respect to the inclined frame 3 until the grounding roller 43 at the rear end of the loading platform shown in FIG. After the loading platform 4 moves backward by a predetermined length with respect to the inclined frame 3 (until the state shown in FIG. 6), the lower surface of the vertical joist 42 of the loading platform collides with the loading platform receiving roller 92 of the support leg 9. In addition, the downward leg portion 90b of the support leg 9 is maintained in a posture in which the support leg 9 is directed downward with respect to the inclined frame 3 in an angle of approximately 90 °. In other words, the load receiving roller 92 of the support leg 9 is restricted from moving up by the vertical joist 42 of the load bed, and the support leg 9 is prohibited from swinging forward about the support shaft 91. . Therefore, at the time of FIG. 6 (the loading platform 4 is parallel to the inclined frame 3), the support height of the rear end portion of the inclined frame by the support leg 9 is high while the posture of the support leg 9 is stable. . At the time of FIG. 6, since the ground angle of the inclined frame 3 is about 10 °, the downward leg portion 90b of the support leg 9 also swings forward by an angle of about 10 ° from the vertical posture. At this time, the support height of the rear end portion of the inclined frame by the support leg 9 is a “high support state” which is much shorter than the length of the support leg 9 (for example, 50 cm). After that, when the cover plate 44 is laid down and brought into contact with the ground, a posture capable of loading a general high vehicle (load platform to ground angle is about 10 °) is obtained.

  Further, in order to further gently tilt the loading platform 4 from the state of FIG. 6, the telescopic cylinder 51 is further extended. Then, while the grounding roller 43 of the loading platform 4 is in contact with the ground, the loading platform 4 further moves backward, and the tilting angle of the loading platform 4 becomes smaller than the tilting angle of the tilting frame 3. Since the body 6) can be tilted with respect to one point (the position of the support shaft 64) at the front end of the loading platform, the loading platform 4 can be tilted with respect to the inclined frame 3 without any trouble. Further, when the inclination angle of the loading platform 4 becomes smaller than the inclination angle of the inclined frame 3, the restriction of the pressure of the supporting leg 9 against the loading platform receiving roller 92 is released, and the supporting leg 9 can swing forward about the support shaft 91. Become.

  Then, when the loading platform 4 further moves rearward and the loading platform front end reaches the vicinity of the rear end of the inclined frame 3, as shown in FIG. 7, the extension of the telescopic cylinder 51 stops and the loading platform 4 moves backward. Complete.

  In the state of FIG. 7, the support leg 9 is greatly swung forward, and the support height of the rear end portion of the inclined frame by the support leg 9 is very low (becomes a “low support state”). Incidentally, in the state of FIG. 7, the front part of the loading platform 4 is lowered to a considerably low position, the loading platform 4 is lowered to a substantially horizontal position near the ground, and the loading platform 4 has a very gentle inclination angle (for example, 2 to 3 °) and stable. In the state where the load platform is gently inclined in FIG. 7, an ordinary vehicle is naturally used, but even a low vehicle can be loaded without any problem.

  The loading platform 4 can load a vehicle in an arbitrary inclination state from the normal inclination angle state shown in FIG. 6 to the gentle inclination angle state shown in FIG.

  In order to store the loading platform 4 from the vehicle loading posture state, it is possible to store the loading platform 4 in the reverse order to the operation at the time of vehicle loading by reducing the telescopic cylinder 51.

  By the way, when the telescopic cylinder 51 is extended from the loading platform retracted state (FIG. 1), the tilting roller 55 moves backward along the guide rail 2 to tilt the tilting frame 3 backward, and the loading platform 4 is tilted to the tilting frame 3. Move backwards. Then, as shown in FIG. 6, when the tilting roller 55 reaches a substantially intermediate position of the horizontal portion 22 of the guide rail 2, the ground roller 43 at the rear end of the loading platform contacts the ground G, and normally (road surface) The support leg 9 is also grounded (if G is flat).

  However, if there is a recess (depression) directly below the support leg 9 as indicated by reference numeral Ga in FIG. 6, the support leg 9 may not be able to contact the ground, but in the state of FIG. Since it is still on the receiving roller 38 at the rear end of the subframe 12, the load of the loading platform 4 is not applied to the inclined frame 3 (in the state of FIG. 6, the load of the loading platform 4 does not affect the inclined frame 3).

  When the telescopic cylinder 51 is further extended and the telescopic cylinder 51 is fully extended as shown in FIG. 7 (the tilted frame 3 is tilted back to the maximum), the front end of the loading platform 4 is located behind the tilted frame 3. The load at the front end of the loading platform 4 (including the weight of the loaded vehicle S) is applied to the position near the rear end of the inclined frame 3.

  On the other hand, in the fully extended state of the telescopic cylinder 51 shown in FIG. 7, if there is a recess (dent) Ga on the ground directly below the support leg 9, the support leg 9 will not come into contact with the ground. All of the tilting force (pressing force at the rear of the tilting frame) is received by the tilting roller 55 (the downward tilting portion 23 of the guide rail 2).

  By the way, in the state of FIG. 7, the distance from the pivot 8 to the front end of the loading platform (support shaft 64) is several times (about 5 times) the distance (interval L) from the pivot 8 to the tilting roller 55. The tilting frame rearward tilting force due to the load at the tip of the loading platform acts as an upward push-up force several times (about five times) on the tilting roller 55 via the pivot 8. As described above, when a large upward pushing force is applied to the tilting roller 55 portion, the tilting roller 55 strongly pushes up the downward inclined portion 23 of the guide rail 2 and is strong against the tilting roller 55 and the guide rail 2. A support force is required (if the support force is insufficient, the support portion may be damaged).

  In view of this, in the load carrier mobile vehicle of this embodiment, the rearward tilting posture of the tilting frame 3 in the state where the load can be loaded and unloaded as shown in FIG. A tension member 18 is provided to prevent the rearward tilting. The tension member 18 is used as a pair of left and right.

  In this embodiment, a folding link is used as the tension member 18 in which two link members 18a and 18b are pivotally supported by a support shaft 18c so as to be bent and extended. This tension member (folding link) 18 is pivotally attached to a bracket 3a (FIGS. 3 and 5) in which the free side end of one link member 18a is provided on the lower surface near the front of the inclined frame 3, and the other The free end of the link member 18b is pivotally attached to a boss 12a provided on the inner surface of the subframe 12.

  Then, as shown in FIG. 7, the tension member 18 is tensioned (extends linearly) between the position closer to the front portion of the inclined frame 3 and the subframe 12 in a state where the inclined frame 3 is tilted back to the maximum. Thus, the length and the attachment position are set. In addition, this tension member (folding link) 18 is laid down in the state folded in two by the front side in the loading platform storage state shown in FIG.

  The tension member 18 functions as follows. In the loading platform retracted state, the tension member 18 is folded in a folded state in the surplus space portion on the front side, so that it does not get in the way. When the tilt frame 3 is tilted backward by the extension operation of the telescopic cylinder 51, the link members 18a and 18b in the folded state are sequentially extended (for example, the state shown in FIG. 6), and the telescopic cylinder 51 is fully extended. In this state (the tilted frame 3 is tilted back to the maximum), both link members 18a and 18b extend linearly as shown in FIG. In a state where both the link members 18a and 18b extend linearly (the state shown in FIG. 7), the tension member 18 does not extend any longer (becomes longer), and the backward tilt acting force acts on the inclined frame 3. If this is the case, the tension member 18 is tensioned, and a function of preventing the tilted frame 3 from tilting further is generated.

  Therefore, even when the support leg 9 at the rear end of the inclined frame 3 is not in contact with the ground (for example, when the concave portion Ga is present on the ground directly below the support leg 9), the tension member 18 is positioned closer to the front of the inclined frame 3. Since it is tense, even if a large backward tilting force acts on the inclined frame 3 due to the load at the front end of the loading platform, the backward tilting force can be supported by the tension member 18. This means that no load is applied to the tilting roller 55 portion (the downward inclined portion 23 portion of the guide rail 2).

  Further, when the tilt frame 3 returns from the maximum rearward tilt position shown in FIG. 7 to the horizontal position, the tension member 18 (both link members 18a and 18b) that has been tensioned in a straight state is automatically folded in two forwards. Is done.

  As in this embodiment, in the case where the position close to the front portion of the inclined frame 3 is supported by the tension member 18, the tilting roller 55 has a slight margin in the vicinity of the rear end portion of the guide rail 2 (downward inclined portion 23). If there is a backlash, various dimensional errors and mounting errors can be absorbed.

  In another embodiment, as the tension member 18, in addition to the above-described folding link, a flexible rope such as a wire rope or chain (including a chain), or a telescopic rod (the rod appears and disappears from the tube). Can be used.

  When a flexible cable is used as the tension member, it is preferable to provide a receiving base that receives the cable that is bent in the loading platform storage state. In addition, when a telescopic rod is used as the tension member (the rod goes up and down with respect to the tube), it can be accommodated even when the inclined frame 3 is in a horizontal posture by mounting the tube in a state where it can fall down. .

  1 is a vehicle (transport vehicle), 2 is a guide rail, 3 is an inclined frame, 4 is a loading platform, 5 is a tilting device, 6 is a moving body, 8 is a pivot, 9 is a support leg, 11 is a chassis frame, and 12 is a sub-frame. A frame (highly rigid portion), 18 is a tension member, 21 is an upward inclined portion, 22 is a horizontal portion, 23 is a downward inclined portion, 51 is a telescopic cylinder, 55 is a tilting roller, and 83 is a support shaft.

Claims (2)

A vehicle having a chassis frame, an inclined frame pivotally supported by a pivot at a rear end position of the chassis frame, a loading platform supported on the inclined frame so as to be movable in the longitudinal direction of the vehicle, and the loading platform And a tilting device that tilts the tilting frame in conjunction with the stretching movement of the telescopic cylinder, and the tilting device is attached to the chassis frame. A load carrier moving type transport vehicle having a guide rail and a tilting roller that can move along the guide rail by the expansion and contraction movement of the telescopic cylinder to tilt the inclined frame,
Between the position closer to the front part of the inclined frame and the highly rigid part on the chassis frame side, the front end of the cargo bed has moved to the rear from the pivotal part of the inclined frame and is tensioned in a state where it can be loaded and unloaded. A tension member is provided to prevent the tilting frame from tilting further backward, and a tension member is interposed .
In the state where the inclined frame is tilted backward until the tension member is tensioned, the tilt frame is supported by the guide rail and the tilting roller by supporting the tilting frame backward tilting force by the front part of the loading platform with the tension member. Power is unnecessary,
Cargo carrier transporter characterized by that. In claim 1,
A support leg is provided on the rear end of the inclined frame, which is in contact with the ground in a state where the loading platform has moved backward to the loadable position.
Cargo carrier transporter characterized by that.

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