JP4556168B2 - Vehicle carrier - Google Patents

Description

  The present invention has a loading platform on which a vehicle to be transported is loaded and left and right step boards pivotally supported at the rear end of the loading platform, and the loading platform and the walking board are slid rearward of the carriage to rear the loading platform and The present invention relates to a vehicle transporter that allows a transported vehicle to be loaded on a loading platform in a state in which the front end of a step board is grounded.

  This type of vehicle transport vehicle is widely used for transferring a new vehicle, transferring a broken vehicle, and the like. Conventionally, for example, the first known example shown in FIGS. 9A to 9C (Patent Document 1), Or the thing of the 2nd well-known example shown in FIG.10 and FIG.11 (patent document 2) etc. is known.

  A vehicle carrier 1 of the first known example shown in FIG. 9 includes a loading platform 2 on which a transported vehicle (hereinafter referred to as a loading vehicle) 6 is loaded, and a step board 3 pivotally supported on the rear end portion 21 of the loading platform 2 so as to be raised and lowered. (There is a pair of left and right). In the vehicle transport vehicle 1 of the first known example, the loading platform 2 is slid from the chassis frame 11 of the transport vehicle 1 to the rear of the transport vehicle as shown in FIG. 9B, as shown in FIG. 9A. However, after the rear end 21 of the loading platform is grounded while being tilted backward, the entire loading platform 2 can be lowered onto the ground as shown in FIG. 9C. Further, as shown in FIG. 9C, when the step board 3 is laid down to the ground side as indicated by a chain line (reference numeral 3 ') in a state where the entire loading platform 2 is lowered on the ground, the loading vehicle 6 is moved to the step board. It can be moved on 3 'and can be loaded and unloaded between the loading platform 2 and the ground. In addition, although the back-and-forth slide mechanism of the loading platform 2, the tilting mechanism of the loading platform 2, the loading and unloading mechanism of the loading platform 2, etc. are disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 2001-315564), those mechanisms are shown in FIG. The illustration is omitted.

  The vehicle carrier 1 of the second known example shown in FIG. 10 has a loading platform 2 on which the loading vehicle 6 is loaded and a step board 3 (a pair of left and right) pivotably supported on the rear end portion 21 of the loading platform 2. is doing. In this vehicle transport vehicle 1, the load carrier 2 is slid to the rear of the transport vehicle 1 together with the step board 3 from the mounted state (the state shown in the chain line) of the load carrier 2 placed on the chassis frame 11 of the transport vehicle 1. After tilting and grounding the loading platform rear end portion 21, when the step board 3 is laid down and the leading end portion of the walking plate is grounded, the loading platform 2 and the walking plate 3 are in a vehicle loading posture as shown by solid lines.

  Further, the vehicle carrier vehicle 1 of FIG. 10 is devised in the loading platform 2 and the step board 3 so that the vehicle carrier 1 can be applied to a low-priced vehicle of a sports car type as the loading vehicle 6. Note that sports car type low vehicle height vehicles (particularly ultra-low vehicle height vehicles) generally have the specifications shown in FIGS. 13 and 14. That is, in a super low vehicle height, as shown in FIG. 13, the horizontal distance L from the ground point P of the front wheel 61 to the maximum protrusion lower end Q of the front nose 62 (hereinafter simply referred to as the front nose lower end Q) is The height H from the lower end Q of the front nose to the ground is about 9 cm (minimum height according to security standards). Therefore, in this case, the ground angle α of the virtual line R connecting the ground point P of the front wheel 61 and the front nose lower end Q in the side view is about 5.8 °. Incidentally, the front nose of the loading vehicle generally has a front bumper, and the lower end of the front nose referred to in the present application has the same meaning as the lower end of the front surface of the front bumper.

By the way, since the outer end shape of the front nose 62 portion of the sports car type vehicle 6 protrudes in a substantially arc shape in plan view as shown in FIG. 14, the front protruding length of the outer end of the front nose 62 is The center of the vehicle width is the longest (the horizontal distance from the axis connecting the centers of the front wheels 62, 62 is L = about 90 cm), and the forward projecting length of the outer end of the front nose 62 sequentially as the vehicle width shifts outward Becomes shorter. The forward protruding lengths L1 and L1 of the front nose lower end positions Q1 and Q1 corresponding to the inner edges 37 and 37 of the respective walking plates 3 and 3 when the vehicle 6 rides on the left and right walking plates 3 and 3 are as follows. In the illustrated example, it is about 85 cm. In this way, at the front nose lower end positions Q1 and Q1 having a forward projecting length L1 (about 85 cm), the ground angle α from the front wheel contact point P in FIG. There is a characteristic that it is slightly larger than the ground angle (α = 5.8 °). Note that this is related to the invention of claim 1, which will be described later.

  As shown in an enlarged view in FIG. 11, the platform 2 and the step board 3 used in the vehicle transport vehicle 1 in FIG. 10 walk in the vehicle loading posture with the floor surface height of the rear end 21 of the platform as low as possible. The ground angle on the upper surface of the plate 3 is set to about 4 °, and the ground angle in the predetermined length range M (the length from the rear end of the cargo bed to the point N, around M = 100 cm) on the upper surface of the cargo bed 2 near the rear end 21. Is set to 6 to 7 °, and the ground angle on the front side from the point N in the loading platform 2 is set to 8 to 10 °, which is the same as the conventional one.

  In this way, when the ground angle on the upper surface of the step board 3 is about 4 ° and the ground angle in the predetermined length range M on the upper surface near the rear end of the loading platform is 6 to 7 °, the loading vehicle 6 is as shown in FIG. In a normal state (indicated by a solid line in FIG. 12), the front nose lower end Q is slightly higher than the upper surface of the step board 3 at the position where the front wheel 61 reaches the tip of the step board 3 (the front nose lower end). Q does not come into contact with the upper surface of the step board 3), and the front nose lower end Q is located at the rear end of the loading platform 6 even when the loading vehicle 6 advances and the front wheel 61 rides on the rear loading end 21 as shown in FIG. The lower end Q of the front nose is not in contact with the upper surface of the loading platform 2 so as to be positioned above the range M of the ground angle of 6 to 7 ° on the upper surface near the portion 21.

JP 2001-315564 A JP 2001-105963 A

  By the way, in the vehicle transport vehicle of FIG. 10 and FIG. 11 (configuration of the loading platform 2 and the step board 3), even if the loading vehicle 6 is a very low vehicle height, if it is in a normal state, the loading vehicle (very low vehicle) It is possible to get on and off the loading platform 2 without hindrance. However, if the front wheel tire is punctured or the air spring device of the front wheel breaks down, the front side of the body of the loading vehicle 6 is lowered. For example, when the front wheel tire is punctured, the front side of the loading vehicle 6 is lowered as shown by the chain line in FIG. 13 (reference numeral 6 '), and the position of the front nose lower end Q' from the normal height H (about 9 cm) at that time. The height decreases to a height H1 (for example, around 6 cm).

  As described above, when the front nose lower end Q of the loading vehicle 6 becomes lower than the normal height due to some trouble (for example, when H1 = 6 cm), the virtual connection between the ground contact point P of the front tire and the front nose lower end Q ′ in a side view. The ground angle of the line is smaller than 4 ° (approximately 3.8 °), and the vehicle carrier of the ultra-low vehicle height specification shown in FIGS. 10 and 11 (the ground angle on the upper surface of the step board is about 4 °) Even so, there is a problem in that the front nose lower end Q ′ interferes with the upper surface of the step board 3 when the front wheel 61 ′ reaches the tip of the step board 3 as shown by the chain line in FIG.

  In this way, in the case where the lower end of the front nose of the ultra-low vehicle is lowered due to some kind of failure as described above, the lower end of the front nose is stepped on the step board 3 even in the vehicle transport vehicle of the first known example of FIG. Interfering with the top surface of the plate is the same.

In the present invention, in view of the above-described conventional problems, even if the front nose lower end height of a super low vehicle height is further lowered due to some failure, the front nose lower end does not interfere with the step board. So that the lower end of the front nose is less likely to interfere with the step board in accordance with the characteristics of the shape of the front nose of the ultra low vehicle height (projecting in a substantially arc shape in plan view). The main purpose of this is to increase the strength of the step board.

  The present invention has the following configuration as means for solving the above problems.

[Invention of Claim 1 of the Present Application]
The invention of claim 1 of the present application is a vehicle having a cargo bed that slides rearward of the transport vehicle and grounds at the rear end portion in a vehicle loading posture, and left and right walking plates pivotally supported at the rear end portion of the cargo bed. Intended for transport vehicles.

  In a general vehicle transporter, when the rear end of the loading platform is grounded, the floor surface of the rear end of the loading platform is located at a height of about 13 to 14 cm from the ground.

  The length of each step board is not particularly limited. For example, about 130 cm is appropriate, and when the front wheel of the loading vehicle is positioned at the tip of the step board with the loading platform and the step board in the vehicle loading posture. The front nose (the front end of the body) of the loading vehicle is positioned slightly in front of the center in the length direction of the step board. Further, the width of the step board is generally about 60 cm.

The vehicle transport vehicle according to claim 1 of the present invention has a frame facing each step board in the length direction of each step board, and the base end portion of each frame in a state where the loading platform and each step board are in the vehicle loading posture. The top surface of the frame is positioned lower than the floor surface height at the rear end of the loading platform, and the front end is substantially the same as the floor surface height at the rear end of the loading platform within a predetermined length range on the upper surface near the base end of each frame. A slope member that is positioned at a height and whose rear end side is inclined downward toward the front end side of the step board is attached. In the present application, the base end portion of the frame is an end portion on the vehicle front side of the frame, and the tip end portion of the frame is an end portion on the vehicle rear side of the frame.

  A plurality of frames (for example, 2 to 3 frames) can be used for each step board frame at intervals in the step board width direction. A cover plate for running the wheel is provided on the upper surface of each frame.

  In addition, when the loading platform and each step board are in the vehicle loading posture, if the height of the upper surface of the base end portion of each step board frame is lower than the floor surface height of the rear end portion of the loading platform, the step board is used. The ground angle of the wheel traveling surface at the upper part of the frame can be made smaller than before (for example, the ground angle of the wheel traveling surface at the upper part of the frame can be reduced to about 3 to 3.5 °). This ground angle (3-3.5 °) is smaller than, for example, the ground angle (eg, 3.8 °) of the imaginary line that connects the front wheel ground contact point and the front nose lower end when the front tire of an ultra low vehicle is punctured. Thus, even when a loading vehicle having a lower front nose lower than usual is placed on the step board, the lower end of the front nose does not interfere with the upper surface of the step board.

  A slope member that slopes downward toward the front end of the step board is attached to the upper surface of the step board frame near the base end. The rear end position (front end of the step board) of the slope member is the front wheel of the loading vehicle. This is a position slightly closer to the base end side of the step board than the front nose position when it is located at the front end of the board. When the rear end position of the slope member is positioned in this way, the front nose does not reach the rear end of the slope member when the front wheel of the loading vehicle is positioned at the front end of the step board. Also, when the front wheels of the loading vehicle ride on the step board, the loading vehicle itself rises and tilts forward, and even when the front nose is positioned on the slope member, the lower end of the front nose interferes with the upper surface of the slope member. Never do. If the slope member is attached to the upper surface near the base end portion of the step board frame in this way, the step between the upper surface of the frame and the floor surface at the rear end of the loading platform can be filled, and the loading vehicle can be moved from the loading plate to the loading platform. You can get on smoothly.

In the invention of claim 1 of the present application, the slope member covers the upper surface of the slope member with the slope plate inclined downward toward the front end side of the step board in the attached state of the slope member. A ridge-shaped ridge line portion is provided from the distal end side of the outer side toward the proximal end side of the inner side, and a portion of the slope plate that is located on the distal end side of the step board from the ridge line portion is disposed from the outer side to the inner side. It is also inclined downward to the side.
Note that the ridge line portion of the slope plate may be formed by bending into a curved surface, or refracting into a mountain fold.

As described above (see FIG. 14), the reason why the slope member upper surface (slope plate) is inclined downward even from the outer side to the inner side of the step board is as described above (see FIG. 14). Since the shape protrudes in a substantially arc shape in plan view, this corresponds to the smaller the loading angle (ground angle α in FIG. 13) of the loaded vehicle toward the vehicle width center side at the lower end of the front nose. In other words, by lowering the slope member upper surface (slope plate) of the step board from the outer side to the inner side, the height of the slope member upper surface on the side where the loading angle of the loading vehicle is reduced can be reduced. The lower end of the front nose is less likely to interfere with the step board (upper surface of the slope member).

[Invention of claim 2 of the present application]
According to the invention of claim 2 of the present application, in the vehicle transport vehicle of claim 1, the frame of each step board uses a straight one without a joint in the length direction of the step board .

As described above, each frame of the step board has a strong rigidity with respect to a load from above by using a straight frame without a joint in the length direction of the step board.

[Invention of claim 3 of the present application]
According to a third aspect of the present invention, in the vehicle transporter of the first or second aspect, a concave portion having a larger depression amount toward the vehicle width center side is formed at a position near the rear end of the loading platform.

  In the recess of claim 3, the outer end shape of the front nose of the loading vehicle protrudes in a substantially arc shape in plan view (the loading angle of the loading vehicle becomes smaller toward the vehicle width center side at the lower end of the front nose. The recess is formed at a position corresponding to the front nose when the front wheel of the loading vehicle reaches the rear end position of the slope member of the step board.

  Then, when the front wheel of the loading vehicle reaches the closest position of the rear end of the slope member on the step board, the ground angle of the frame upper surface (wheel running surface) of the step board is very loose (for example, 3 to 3.5 °). ) The front nose lower end height is not so high, and the entrance angle is smaller toward the vehicle width center side at the lower end of the front nose. Therefore, the entry angle of the loading vehicle at the rear end portion of the loading platform is reduced. The lower part of the front nose is prevented from interfering with the upper surface of the loading platform by increasing the amount of depression as the portion is increased.

[Invention of claim 4 of the present application]
According to a fourth aspect of the present invention, in the vehicle transport vehicle according to any one of the first to third aspects, a slipping punching process is applied to a running surface of each step board.

  On the upper surface of each step board, a board at the tip of the step board, a covering plate at the upper surface of the frame, a slope plate at the slope member part, etc. are provided, but they are not slipped on the upper surface of these running boards. If the punching process is applied, the wheels will not slip when the loading vehicle is loaded.

[Effect of the invention of claim 1 of the present application]
The vehicle transport vehicle according to the first aspect of the present invention has the following effects.

(1) When the loading platform and each step board are in the vehicle loading posture, the upper surface height of the base end portion of each step board frame is positioned lower than the floor surface height of the rear end portion of the loading platform. The ground angle (which becomes the wheel running surface) becomes very loose (for example, 3 to 3.5 °). For example, the front nose lower end of the super low vehicle height is lowered due to a puncture of the front wheel tire or a failure of the air spring device of the front wheel. Even if it is lower than normal, the lower end of the front nose does not interfere with the upper surface of the step board when the vehicle is loaded.

(2) Since a slope member that is inclined downward toward the front end of the step board is attached to the upper surface near the base end of the frame of the step board, there is a step between the upper surface of the step board frame and the floor surface of the rear end of the loading platform. It can be buried and the loading vehicle can be smoothly put on the loading platform from the walking board.

(3) Since a part of the slope plate covering the upper surface of the slope member is inclined downward even from the outer side of the step plate toward the inner side, the inner side of the step plate on the upper side of the slope member (especially The rear side of the inner side of the step board is lower). Accordingly, the height of the top surface of the slope member on the side where the loading angle of the loading vehicle is reduced (vehicle width center side) can be reduced, and the front nose outer end protrudes in a substantially arc shape in plan view. Even so, the lower end of the front nose is less likely to interfere with the step board (upper surface of the slope member).

[Effect of the invention of claim 2 of the present application]
According to the second aspect of the present invention, in the vehicle transport vehicle according to the first aspect, the frame of each step board uses a straight frame without a joint in the length direction of the step board. In addition to the above effect, even if the bent portion of the slope member is provided on the upper surface of the step board, there is an effect that it becomes highly rigid with respect to the load from above and the step board can be made high strength. .

[Effect of the invention of claim 3 of the present application]
According to a third aspect of the present invention, in the vehicle transporter of the first or second aspect, a concave portion having a larger depression amount toward the vehicle width center side is formed at a position near the rear end of the loading platform. That is, when the front nose of the loading vehicle is positioned closer to the rear end of the loading platform (when the front wheel of the loading vehicle approaches the position closest to the rear end of the slope member on the step board), the loading angle of the loading vehicle is The smaller the portion (the lower end of the front nose at the center of the vehicle width) corresponds, the greater the amount of depression on the upper surface of the loading platform.

  Therefore, in the vehicle transport vehicle of claim 3, in addition to the effect of claim 1 or 2, when the front nose lower end of the loading vehicle is positioned closer to the rear end of the loading platform, the loading angle of the loading vehicle is There is an effect that the lower end of the front nose does not interfere with the upper surface of the loading platform even in a portion that becomes smaller (lower end of the front nose on the vehicle width center side).

[ Effect of the invention of claim 4 of the present application ]
According to a fourth aspect of the present invention, in the vehicle transport vehicle according to any one of the first to third aspects, a slipping punching process is applied to a running surface of each step board.
Therefore, in addition to the effects of the first to third aspects, the vehicle transport vehicle of claim 4 has the effect that the wheels of the loading vehicle do not slip while traveling on the upper surface of the step board.

  Therefore, in addition to the effects of the first to third aspects, the vehicle transport vehicle of claim 4 has the effect that the wheels of the loading vehicle do not slip while traveling on the upper surface of the step board.

  Hereinafter, a preferred embodiment of the present application will be described with reference to FIGS. 1 to 8. A vehicle carrier shown in FIG. 1 is a loading platform 2 on which a loading vehicle 6 is loaded on a chassis frame 11 of a vehicle (carrier vehicle) 1. And the step board 3 is pivotally supported at the rear end portion 21 of the loading platform 2 so as to be raised and lowered (the pivot portion 9 in FIGS. 2 and 4).

  The loading platform 2 slides backward from the state where it is placed on the chassis frame 11 (shown by the chain line in FIG. 1) and tilts backward so that the rear end 21 of the loading platform is grounded (the solid line in FIG. 1). As shown). In addition, since the drive device for sliding and tilting the loading platform 2 is not so much related to the gist of the present application, illustration thereof is omitted, but a conventional loading platform drive device can be used.

  As shown in FIG. 2, two left and right rollers 22 and 22 are attached to the lower surface of the rear end portion 21 of the loading platform 2, and the rollers 22 and 22 are grounded when the loading platform 2 is slid backward. It comes to roll. FIG. 4 is a partially enlarged view of FIG. 1, but when the loading platform 2 with the roller 22 grounded as shown in FIG. 4 is used, the floor surface height of the loading platform rear end portion 21 is 13 to 14 cm from the ground. Become.

  As shown in FIG. 2, wheel traveling portions 23, 23 of the loading vehicle 6 are formed on the loading platform 2 at positions closer to both sides in the loading platform width direction. Further, a space 24 is formed at a position near the rear end 21 of the cargo bed over a considerable length range between the left and right wheel running portions 23, 23.

  As shown in FIGS. 2 and 3, the step board 3 has a pair of left and right, but each of the step boards 3 and 3 is attached to positions near both ends of the common frame 31 having the same length as the width of the loading platform 2. ing. As shown in FIG. 4, the common frame 31 is a hollow square having a vertically long cross section and having a vertical width of about 9 to 10 cm. Each of the walking boards 3 and 3 is formed in a rectangular shape in plan view having a front-rear length of about 130 cm and a left-right width of about 60 cm.

  As shown in FIGS. 3 and 5, each step board 3, 3 has a set of three frames 4, 4, 4. Each of the frames 4, 4, 4 has a rectangular shape with a hollow cross section and a thickness of about 4 cm in the vertical width. Each of the frames 4 is a straight line that is seamless over its entire length. Each frame 4, 4, 4 is placed in parallel with a predetermined interval on the left and right as a set of three, and the base end portion 41 of each frame 4, 4, 4 is positioned closer to the lower part of the rear surface of the common frame 31. Welded to. The upper surface of the base end portion 41 of each of the frames 4, 4, 4 is at a position lowered by a considerable height (for example, 5 to 6 cm) from the upper surface of the common frame 31.

  The left and right walking plates 3 and 3 are each provided with a board 33 attached to the distal ends of a set of three frames 4, 4, 4, and a predetermined length range on the upper surface near the base end of each frame 4, 4, 4. The slope member 5 (which will be described in detail later) is attached, and the covering plate 34 is attached to the remaining portions of the upper surfaces of the frames 4, 4, 4. A reinforcing connecting frame 32 is interposed between the innermost frames 4 and 4 of the left and right walking plates 3 and 3. In this embodiment, the left and right walking plates 3 and 3 are integrated by a common frame 31 and a connecting frame 32.

  As shown in FIG. 3, the slope members 5, 5 near the base end portions of the step plates 3, 3 are attached to the upper surfaces of the step plate frames 4, 4, 4, respectively. 52, 53, 54, and a slope plate 51 that is covered over the three inclined pedestals 52, 53, 54. The three inclined pedestals 52, 53, 54 fill the steps between the upper surfaces of the step board frames 4, 4, 4 and the upper surface of the common frame 31. Is the same height as the upper surface of the common frame 31, and the upper surfaces of the tip ends of the inclined pedestals 52, 53, 54 are the same height as the upper surfaces of the step board frames 4, 4, 4. In addition, the set of three inclined pedestals 52, 53, 54 has a long outer position, a middle length at the intermediate position, and a shorter inner position at each side of the step plates 3, 3. Is formed. As shown in FIG. 3, in the set of three inclined pedestals 52, 53, and 54, the upper surface inclination angle of the inclined pedestal 52 at the outer position is gentle, and the upper inclined surface of the inclined pedestal 54 at the inner position is provided. The corner is steep. Further, the upper surface of the inclined cradle 53 at the intermediate position has a considerably long portion near the base end thereof having the same gentle inclination angle as the upper surface inclination angle of the outer inclined cradle 52, and the remaining length portion on the distal end side thereof. The steep inclination angle is the same as the upper surface inclination angle of the inner inclined cradle 54.

  On the other hand, as shown in FIGS. 2, 3, and 7, the slope plate 51 covers the upper surface of each of the three inclined pedestals 52, 53, and 54 and the partial upper surface of the common frame 31 almost without excess or deficiency. It has the area and shape to obtain. That is, each of the slope plates 51, 51 is formed in a trapezoidal shape in which the outer side 36 side of the step board 3 is long and the inner side 37 side of the step plate 3 is short in plan view. Further, in this embodiment, the slope plate 51 is formed with a ridge line portion 51c refracted in a mountain fold shape at a position connecting the tip position on the outer side of the step board and the position near the rear end on the inner side of the step board. ing. In addition, this ridgeline part 51c can also be made into a rounded curved surface part. Each slope plate 51, 51 is fixed in a state of covering the upper surface of a set of three inclined pedestals 52, 53, 54 and the upper surface of the common frame 31.

  Thus, in the state of attachment of the slope members 5 and 5 on each side, the slope plates 51 and 51 are inclined downward toward the tip of the step plate (see FIG. 4), and a part of the slope plate 51 is a step plate. 3 is inclined downward from the outer side 36 to the inner side 37 (see FIG. 5). The covering plate 34 on the step board frames 4, 4, 4 covers the entire remaining surface of the slope plate 51 and the boarding plate 33.

  The upper surface of each of the step plates 3 and 3 is punched for slipping over the entire surface (the boarding plates 33 and 34 covering plates and the slope plate 51). In this embodiment, the left and right wheel running portions 23, 23 of the loading platform 2 are similarly punched for slipping.

  The integrated step boards 3 and 3 are attached to the rear end 21 of the loading platform so that they can be raised and lowered up and down. That is, pivot portions 9 and 9 are provided at two left and right positions between the front surface of the common frame 31 and the rear surface of the loading platform rear end portion 21, respectively, so that each of the walking plates 3 and 3 has a substantially vertical posture (when not in use) and a substantially horizontal posture. (When in use) can be undulated.

  In the mounted state of each step board 3, 3, as shown in FIGS. 2 and 4, the upper surface of the base end portion 41 of each step board frame 4 is at a position considerably lower than the floor surface height of the load carrier rear end portion 21, and The slope plate 51 has a front end 51a inclined downward from the position substantially the same as the floor surface height of the loading platform rear end portion 21 toward the front end of the step plate on the slope plate rear end 51b side.

  In the left and right wheel running portions 23 and 23 of the loading platform 2, recessed portions 25 and 25 having a larger amount of depression toward the vehicle width center portion are formed at positions closer to the loading platform rear end portion 21. The concave portion 25 is formed by providing a concave bent portion on the plate material of each wheel running portion 23, 23 as shown in FIGS. 2, 4, and 7, and the bottom surface of the concave portion 25 is formed by each wheel. The traveling portions 23 and 23 are gently inclined downward from the outer side toward the inner side.

  In the vehicle transport vehicle of this embodiment, in the state where the loading platform 2 and the step board 3 are in the vehicle loading position (the state shown in FIGS. 4 and 6), the floor surface of the loading platform rear end portion 21 and the front end portion (mounting) The ground angle of the imaginary line connecting the tip of the embedded plate 33 is about 5.8 °, but the ground angle of the upper surface of the step board frame 4 (the upper surface of the covering plate 34) is 3 to 3.5 °. Further, as shown in FIG. 7, the rear end 51b of the slope member 5 (slope plate 51) on the step board 3 is connected to the front wheels 61 and 61 of the loading vehicle 6 at the front ends of the step boards 3 and 3 (the board 33). Even in the state of being located, the front nose 62 is located in front of the outer end.

  By the way, when the loading vehicle 6 is a sports car type ultra-low vehicle, as shown in FIG. 6 (also described in FIG. 13), the grounding point P of the front wheel 61 and the lowermost projecting portion lower end Q of the front nose 62 (hereinafter, The ground angle of the imaginary line connecting to the front nose lower end Q) is approximately 6 °. For example, when the front tire is punctured (reference numeral 61 ′) as shown by the chain line in FIG. 6, the front nose lower end Q Becomes lower as indicated by the symbol Q ′, and the ground angle of the imaginary line connecting the front wheel ground contact point P and the lower front nose Q ′ at the lower position becomes about 4 °. In addition, as a cause of lowering the front nose lower end Q, there is a failure of the air spring device of the front wheel.

  Further, when the loading vehicle 6 is of a sports car type, as shown in FIG. 7 (also described in FIG. 14), the front nose 62 protrudes in a substantially arc shape in plan view. The forward projecting length is the longest at the vehicle width center (the position of the symbol Q), and becomes shorter as it deviates outwardly from the vehicle width.

  Then, in the stepping plates 3 and 3 of the vehicle transport vehicle of this embodiment, when the ultra-low vehicle 6 is put in, the front wheel 61 has a stepping plate tip (boarding plate 33) as shown in FIGS. ), The front nose lower end Q is separated from the upper surface of the step board (the upper surface of the cover plate 34). Even when the front wheel tire is punctured and the front nose lower end Q is lowered to the height of the reference sign Q ′, the front nose lower end Q ′ does not interfere with the upper surface of the step board (the upper surface of the covering plate 34). And even if each front wheel 61, 61 of the loading vehicle 6 rides on each step board 3, 3, the entire range of the front nose lower end Q is the upper surface of each step board 3, 3 (each of the covering plate 34 and the slope plate 51). There is no interference with the top surface. Further, when the slope plate 51 is inclined downward toward the inner side 37 of the walking board as in this embodiment, the front nose lower ends Q1, Q1 near the vehicle width center (position corresponding to the inner side 37 of the walking board) But enough space can be secured.

  Also, as shown in FIG. 8, when the front wheel 61 is approaching the position closest to the rear end 51b of the slope member, the ground angle of the covering plate 34 is very loose (for example, 3 to 3.5 °), so the front nose. Although the height of the lower end Q is not so high, the front nose lower end Q is the upper surface of the loading platform 2 because the recesses 25 are formed in the portions corresponding to the front nose lower end Q of the wheel running portions 23, 23 of the loading platform 2, respectively. The front nose lower end Q does not interfere with the upper surface of the loading platform (the wheel running portions 23, 23) even at the position closest to the vehicle.

  Thus, in the vehicle transport vehicle of the embodiment of the present application, even an extremely low vehicle height that is just below the safety standard can be loaded on the step board 3 and the loading platform 2 with a margin, and further, Even if the front nose lower end Q is further lowered due to some failure, the front nose lower end Q can be loaded up to the loading platform 2 without interference. Moreover, since the step board 3 uses the linear frame 4 without a joint, it has a function of increasing strength against a load from above.

  Of course, the construction of the step board 3 of the present application can be applied to a vehicle transport vehicle of a type in which the loading platform 2 shown in FIG. 9 is completely lowered onto the ground.

1 is an overall side view of a vehicle transport vehicle of an embodiment of the present application. FIG. 2 is a perspective view of a loading platform and a step board portion used in the vehicle transport vehicle of FIG. 1. It is a disassembled perspective view of the step board part of FIG. It is IV-IV sectional drawing of FIG. It is VV sectional drawing of FIG. It is function explanatory drawing of the step board part in the vehicle transport vehicle of FIG. FIG. 7 is a plan view of FIG. 6. FIG. 7 is a state change diagram from FIG. 6. It is use explanatory drawing of the vehicle carrier of a 1st known example. It is a whole side view of the vehicle transportation vehicle of the 2nd well-known example. FIG. 11 is a partially enlarged view of FIG. 10. It is explanatory drawing of the problem of the vehicle transport vehicle of FIG. It is explanatory drawing (side view) of a super low vehicle height vehicle. It is a top view of the ultra-low vehicle height vehicle of FIG.

  1 is a transport vehicle, 2 is a loading platform, 3 is a step board, 4 is a frame of the step board, 5 is a slope member, 21 is a rear end portion of the loading platform, 25 is a recess, 33 is a boarding plate, 34 is a covering plate, 36 is The outer side of the step board, 37 is the inner side of the step board, 41 is the frame base end, 51 is the slope plate, 51a is the front end, 51b is the rear end, 61 is the front wheel, 62 is the front nose, and Q is the front nose lower end.

Claims (4)

The carrier (2) that slides rearward of the transport vehicle (1) and contacts the rear end (21) in the state of loading the vehicle and pivotally supported on the rear end (21) of the carrier (2) so as to be raised and lowered. A vehicle carrier having left and right walking boards (3, 3),
Each of the walk boards (3, 3) has a frame (4, 4) facing the walk board length direction.
In the state where the loading platform (2) and each step board (3, 3) are in the vehicle loading position, the height of the upper surface of the base end portion (41, 41) of each frame (4, 4) is set to the rear end portion of the loading platform. (21) is positioned lower than the floor height,
While it is attaching the slope member (5) to a predetermined length range of the base end portion toward an upper surface of the respective frame (4,4),
The slope member (5) has an upper surface in a mounted state of the slope member (5), and a front end (51a) is located at substantially the same height as a floor surface height of the rear end portion (21) of the cargo bed, and a rear end ( 51b) the side is covered with a slope plate (51) that slopes downward toward the front end of the step plate,
The slope plate (51) is provided with a mountain-folded ridge line portion (51c) from the distal end side of the outer side (36) of the step plate (3) toward the proximal end side of the inner side (37), and the slope A portion of the plate (51) located on the tip side of the step board (3) from the ridge line portion (51c) is inclined downward even from the outer side (36) side toward the inner side (37) side.
A vehicle carrier characterized by that. 2. The vehicle carrier according to claim 1, wherein the frames (4, 4) of each step board (3, 3) are linearly connected without any seam in the length direction of the step board .   The vehicle carrier according to claim 1 or 2, wherein a concave portion (25) having a larger depression amount is formed closer to the vehicle width central portion at a position closer to the rear end portion (21) of the loading platform (2).   4. The vehicle carrier according to claim 1, wherein the running surface of each step board (3, 3) is subjected to a punching process for preventing slipping.

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