JP2017178030A - Vehicle equipped with cargo receiving stage lifting device - Google Patents

Abstract

An object of the present invention is to provide a structure capable of improving strength when receiving a rear impact load in a vehicle equipped with a loading platform lifting device. [Constitution] A vehicle equipped with a load-receiving platform lifting device in which posts are fixed to the left and right rear portions of a load-bearing platform mounted on a chassis frame whose longitudinal direction is the longitudinal direction of the vehicle, and the load-receiving platform is supported by a slider that ascends and descends within the posts. , a bumper is provided via a hanging portion fixed to the rear portion of the chassis frame. The load-receiving tray lifting device may have a cross member installed between the left and right posts, and the hanging portion may have a connecting portion connected to the cross member. [Selection drawing] Fig. 1

Description

  The present invention relates to a vehicle including a load receiving platform lifting device, and more particularly to a vehicle including a load receiving platform lifting device in which a post is fixed to a rear portion of the loading platform and the load receiving platform moves up and down along the post.

  When loading / unloading a load between the loading platform of the vehicle and the ground, a loading platform lifting / lowering device 90 fixed to the rear portion of the vehicle 900 is used, for example, as shown in FIG. The cargo receiving platform lifting / lowering device 90 includes a post 91 erected on the left and right sides at the rear of the vehicle, a slider 92 provided so as to be movable up and down in the post 91, and is supported by the slider 92 and can be lifted vertically in a horizontal posture. And a receiving platform 93. A cross member 94 is installed between the left and right posts 91, and the upper surface of the cross member 94 is substantially flush with the cargo bed floor surface 901.

  The cargo bed floor surface 95 is mounted on a pair of left and right chassis frames 902 whose longitudinal direction is the longitudinal direction of the vehicle. Since the post 91 is fixed to the cargo bed floor surface 901 and the side wall portion 903, the load and the like when lifting the cargo on which the cargo receiving platform 93 is placed are distributed to the chassis frame 902 via the cargo bed floor surface 901. .

  Further, as shown in FIG. 4B, the cross member 94 is supported by the chassis frame 902 via a support bracket 95 (for example, Patent Document 1). Therefore, the load received by the load receiving platform lifting / lowering device 90 is also distributed to the chassis frame 902 via the support bracket 95.

Japanese Patent No. 5237068 (paragraph 0052, FIG. 8)

  In the case of the load receiving platform lifting / lowering device 90, as described above, the load can be skillfully distributed, but there is still room for improvement when the strength is further improved. Specifically, the inventor of the present invention paid attention to the fact that the bumper 96 is installed in the lower part of the post 91 as shown in FIG.

  Since the rear impact load received by the bumper 96 is distributed from the post 91 to the chassis frame 902 via the cross member 94, one of the strengths (impact resistance) when the impact force (rear impact load) is received is improved. As a means, the strength of the post 91 and the cross member 94 can be increased. Therefore, if the post 91 is thickened to increase the strength of the post 91, it is necessary to increase the strength of the cross member 94 that supports the post 91, and the vehicle weight increases.

  The cross member 94 has a configuration in which a hydraulic cylinder or the like is accommodated as a known member. For this reason, increasing the thickness to increase the strength leads to a reduction in the storage space of the hydraulic cylinder or the like, so that there is a limit to increasing the thickness. On the other hand, when the upper surface of the cross member 94 is increased in order to secure the storage space, it becomes difficult to maintain a substantially flush state with the cargo bed floor surface, and when the lower surface is lowered, it is difficult to ensure the ground height H91. . Similarly, even if an attempt is made to provide a member that supports the lower surface of the cross member 94, there is a great limitation in terms of space because a jewelery such as a tail lamp is provided below the cross member 94.

  Further, since the post 91 guides the raising and lowering of the slider 92, it is preferable that the post 91 extends downward from the cross member 94 as shown in FIG. 4B (length H92). However, the larger the length H92, the larger the loading platform. A rear impact load received by the bumper 96 is generated as a large load on the fixed portion P91 of the post 91 with respect to the floor surface 901 and the support portion P92 of the support bracket 95 with respect to the cross member 94.

If the post 91 is distorted due to insufficient improvement in the strength (impact resistance) against the rear impact load in the load receiving platform lifting device 90 having such a bumper 96, the slider 92 is lifted and lowered along the vertical direction. Operation is hindered. Similarly, even if the cross member 94 is distorted or the like, a step is generated between the cross member 94 and the cargo bed floor surface 901, and the lubricous movement of the load may be hindered.
The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a configuration capable of improving strength when a rear impact load is received in a vehicle including a load receiving table lifting device.

In the present invention, as described below, a post is fixed to the left and right rear portions of a loading platform mounted on a chassis frame having a longitudinal direction in the vehicle longitudinal direction, and the loading platform is supported by a slider that moves up and down in the post. It is intended for vehicles equipped with the device, and specifically takes the following measures.
As a feature of the present invention, the bumper portion is provided via a hanging portion fixed to the rear portion of the chassis frame.

  Here, the “hanging portion” is a portion that is provided with the width direction of the vehicle as a longitudinal direction and fixes a bumper portion that receives a rear collision of the following vehicle relative (indirectly) to the chassis frame. The “hanging portion” extends downward with respect to at least the chassis frame, and is provided so that the bumper portion to be fixed has substantially the same height as the conventional one.

  The vehicle subject to the present invention is provided with a load receiving platform elevating device in the vicinity of the rear portion of the chassis frame. Further, due to factors such as the space of the vehicle and the complexity of the structure, a suspension such as a bumper stay is provided at the rear portion of the chassis frame. Although there was no idea of adopting a configuration in which a portion is provided, a new configuration and effect can be realized in the vehicle by the present invention.

  Moreover, the said load receiving table raising / lowering apparatus concerning this invention has the cross member erected between the said right and left posts, and the said hanging part has a connection part connected with the said cross member.

  With this configuration, the hanging portion can have a function of supporting both the bumper portion and the cross member with respect to the chassis frame. In other words, in the limited space below the loading platform, it is possible to avoid providing a separate fixing member for the bumper part and a fixing member for the cross member separately (independently different positions), and effectively use the limited space. can do.

  The hanging portion has an extending portion that extends downward with respect to the chassis frame and supports the bumper, and one of the extending portion and the connecting portion is fixed to the chassis frame via the other. It can also be set as the structure made.

  Furthermore, the connection part and the extension part may be configured to be fixed to the chassis frame in a state where at least a part thereof overlaps in the vehicle front-rear direction.

  According to the present invention, the bumper is not connected to the post, but the bumper is fixed to the chassis frame via the hanging portion, so that the rear impact load is not propagated to the post or the like. Can be dispersed. Therefore, enlargement and weight increase of the post and cross member can be avoided. Even if the strength against the impact force (rear impact load) in the bumper is improved, the layout change of the hydraulic cylinder etc. is not required, and the loading and unloading efficiency is also improved. The same level as before can be maintained.

(A) is a side view which shows the vehicle provided with the load receiving table raising / lowering apparatus based on 1st Embodiment, (b) is an enlarged view of the bumper vicinity. (A) is the principal part rear view of the vehicle provided with the load receiving stand raising / lowering device which concerns on 1st Embodiment, (b) is the principal part side view. (A) is a side view of a load receiving platform lifting apparatus according to the second embodiment, (b) is a rear view of a main part of a vehicle equipped with the apparatus, and (c) is a side view of a load receiving platform lifting apparatus according to a third embodiment. FIG. 4D is a rear view of the main part of the vehicle equipped with the same device. (A) is a perspective view of a conventional cargo receiving platform lifting apparatus, and (b) is a rear view of a main part of a vehicle equipped with the apparatus.

  Embodiments of a cargo receiving platform lifting apparatus according to the present invention will be described with reference to the drawings. In addition, this invention is not limited to the content of each embodiment, Other content is applicable.

  FIG. 1A is a schematic diagram of a rear side surface of a vehicle T provided with a load receiving platform lifting apparatus 100 according to the first embodiment. The left side of the drawing is the front side of the vehicle T, and the right side of the drawing is the rear side of the vehicle T. On the side.

  The load receiving platform lifting device 100 includes a pair of left and right posts 1 erected at the rear of the vehicle, a slider 2 that is inserted into each post 1 and can be moved up and down, and a load receiver that is rotatably supported at the lower end of the slider 2. A stand 3 is provided. The loading platform 3 is moved up and down (arrow A1) between the ground and the loading platform B in the illustrated horizontal posture, and the posture is changed from the horizontal posture to the standing posture when loading and unloading is completed and the vehicle is in a traveling state. (Arrow A2). The loading platform B is mounted on a chassis frame CF whose longitudinal direction is the vehicle front-rear direction (the left-right direction in the drawing), specifically, a vertical frame TF that is fixed to the chassis frame CF and has the same direction as the longitudinal direction. It is mounted on.

  The load receiving platform 3 is supported by the slider 2 via attachment members 4 at both left and right ends thereof, and the posture change is performed with the left-right direction as the axial direction and the shaft support portion of the attachment member 4 as the center. The attachment member 4 is connected to a projecting portion 2a of the slider 2 that projects rearward through a slit (not shown) provided on the rear surface of the post 1.

  A cross member 5 is installed between the pair of left and right posts 1, and a hydraulic cylinder 6 is provided inside the cross member 5. The slider 2 is connected to the hydraulic cylinder 6 via a wire W. One end of the wire W is fixed to the upper ends of the left and right sliders 2, guided upward from the slider 2, and folded downward by a sheave C <b> 1 provided on the upper portion of the post 1. The other end portion of the folded wire W is led downward, and is led from the middle portion of the post 1 to the hydraulic cylinder 6 via a sheave (not shown) and is appropriately fixed. The wire W is drawn out to or drawn from the post 1 by the expansion and contraction operation of the hydraulic cylinder 6, and the slider 2 fixed to the wire W is moved up and down. The load receiving platform 3 moves up and down in the vertical direction along the post 1 as the slider 2 moves up and down.

  The load receiving platform lifting / lowering device 100 has a configuration in which the post 1 is fixed to the rear portion of the vehicle, specifically, the left and right rear portions of the loading platform B, and the cross member 5 is further passed through a hanging portion 7 extending downward from the chassis frame CF. The chassis frame CF and the vertical frame TF are also fixed. The drooping portion 7 is welded to the outer side surfaces of the left and right chassis frames CF and vertical frames TF in the vehicle width direction, and is also welded to the cross member 5.

  A bumper portion 8 whose longitudinal direction is the vehicle width direction is fixed to the left and right hanging portions 7. The bumper portion 8 is fixed to the vehicle rear surface portion at the lower portion of the left and right hanging portions 7. The bumper portion 8 is provided so as to enter between the left and right posts 1, and the length in the longitudinal direction is shorter than the distance between the left and right posts 1 facing each other.

As shown in FIG. 1B, the drooping portion 7 is made of a metal plate material formed by bending the front side, the rear side, and the lower side, and the main body surface portion 71 welded to the chassis frame CF and the vertical frame TF. A front surface portion 72 bent substantially perpendicular to the main body surface portion 71 on the vehicle front side, a rear surface portion 73 bent substantially perpendicular to the main body surface portion 71 on the vehicle rear side, and a main body on the lower side. A lower surface portion 74 that is bent substantially perpendicularly to the surface portion 71. In FIG. 1B, for convenience of explanation, the main body surface portion 71 is shaded, the cross member 5 to which the hanging portion 7 is welded, the chassis frame CF and the vertical frame TF are indicated by solid lines, and the others are indicated by two-dot chain lines. Show.
The main body surface portion 71 includes a first main body surface portion 71 a that is the front side of the vehicle with respect to the cross member 5, and a second main body surface portion 71 b that is the lower side of the cross member 5.

  The first main body surface portion 71a is fixed to each other by welding as a connecting portion 71at for the vehicle front surface portion 5a of the cross member 5, the vertical frame TF, and the chassis frame CF. The second main body surface portion 71b is also fixed to the lower surface portion 5b of the cross member 5, the vertical frame TF, and the connection portion 71bt to the chassis frame CF by welding. Since the main body surface portion 71 includes both the first main body surface portion 71a and the second main body surface portion 71b, a desired welding (connection) area can be secured at least with respect to the chassis frame CF, and the bumper portion 8 receives a rear impact load. Has a certain level of durability against the load. Each of the first main facing portion 71a and the second main body surface portion 71b also has extension portions 71ar and 71br extending downward from the chassis frame CF while securing the above-described welding area with respect to the chassis frame CF. Yes.

  The bumper portion 8 is provided on the rear side of the second main body surface portion 7b among the extending portions 71ar and 71br. As shown in FIG. 2A, the bumper portion 8 is fixed to the chassis frame CF near the center in the vehicle width direction via the hanging portion 7. For this reason, the rear impact load received by the bumper portion 8 is distributed to the chassis frame CF via the hanging portion 7, and it is possible to avoid the subsequent impact load from propagating to the post 1 and the cross member 5. In particular, the bumper portion 8 according to this embodiment is compared with a configuration in which the bumper portion 8 is fixed to the lower portion 1a of the post 1 and the distance W1 to the portion where the cross member 5 is supported by the chassis frame CF is large. Since it is a structure which can avoid propagation of the above-mentioned rear impact load, generation | occurrence | production of the twist with respect to the post | mailbox 1 or the cross member 5 can be suppressed significantly. Therefore, it is possible to always ensure a smooth rise of the slider 2 and the load receiving table 3 due to the stretchability along the vertical direction of the post 1. In addition, since the twist of the cross member 5 is suppressed, a substantially flush state between the floor surface of the loading platform B and the upper surface of the cross member 5 can be secured at all times, so that smooth movement of the load can be secured.

  Moreover, by providing the hanging part 7 and the bumper part 8 according to the present embodiment, it is possible to realize a reduction in the number of man-hours regardless of the type of vehicle. As shown in FIG. 2B, the drooping portion 7 is in a state where the second main body surface portion 7b overlaps the post 1 when viewed from the side, and only the first main body surface portion 7a does not overlap. That is, the region where the hanging portion 7 is fixed to the chassis frame CF may be only the length L1 on the vehicle front side with respect to the post 1 while ensuring a desired welding area. In particular, when the vehicle size is reduced, the predetermined area of the length L2 on the cargo bed floor surface B is reduced, and if a configuration in which a spare tire or the like is attached is adopted, the restriction on the predetermined area becomes severe. In such a case, if it is the hanging part 7 which concerns on this embodiment, since a welding area can be limited only to the said length L1, inhibiting the freedom degree of the said predetermined area | region can also be suppressed.

  Further, the bumper portion 8 is not located at the back side of the front side of the vehicle below the loading platform B, but has a length L3 relative to the standing loading platform 3 by the hanging portion 7 fixed to the chassis frame CF near the post 1. It is provided in the position near from the rear end of the vehicle T. Moreover, the hanging part 7 has a shape with the vertical direction as the longitudinal direction, as illustrated. The drooping portion 7 is, for example, another drooping portion provided on the front side of the vehicle with a welded portion with the chassis frame CF, and has a shape that is curved and drawn to the rear side of the vehicle when viewed from the side of the vehicle. In comparison, the small shape helps reduce the number of man-hours for bodywork. Of course, the shape according to this embodiment also contributes to weight reduction. Since the load receiving platform 3 moves up and down the vehicle rear region S adjacent to the post 1 by the load receiving device lifting device 100, the bumper 8 may be installed on the vehicle rear side as long as it does not overlap with the region S.

  As described above, the hanging part 7 according to the present embodiment is a support member that supports both the cross member 5 and the bumper part 8, thereby improving the strength when receiving a rear impact load, Maintaining the work efficiency of the load receiving platform 3 in the load receiving platform lifting apparatus 100 and the work movement of the load at all times, suppressing the number of man-hours and weight for the chassis frame CF, and further providing the bumper portion 8 at a good site. It is very useful.

  In particular, the load receiving table lifting apparatus 100 according to the present embodiment is provided in the rear portion of the chassis frame CF and in the vicinity thereof (see FIG. 1A). Therefore, in the lower region, which is a limited space of the loading platform B, the degree of freedom in terms of the space is further limited. However, the above-described hanging portion 7 supports the cross member 5 and the bumper portion 8. Both can be combined.

  In the vehicle T including the load receiving table lifting device 100, the configuration of the hanging part 7 is not limited to the above-described embodiment, and the hanging part 70 according to the second embodiment shown in FIGS. The present invention is also applicable to 700 according to the third embodiment shown in FIGS. 3 (c) and 3 (d). In FIG. 3, since the drooping portions 70 and 700 are mainly different from the first embodiment, the drooping portions 70 and 700 are mainly shown, and other members are denoted by the same reference numerals as those in the first embodiment. ing.

  Unlike the first embodiment, the hanging portion 70 according to the second embodiment extends to the chassis frame CF and a mounting bracket 71 that is a connecting portion for fixing the cross member 5 to the chassis frame CF. It has the structure where it has the extension part of a state, and the bumper stay 72 which fixes the bumper part 8 to the said extension part was assembled | attached.

  In the present embodiment, the mounting bracket 71 is welded to the vehicle width direction outer side surfaces of the chassis frame CF and the vertical frame TF. Further, a bumper stay 72 is welded to the mounting bracket 71 so as to overlap with the mounting bracket 71 when viewed from the side of the vehicle. The mounting bracket 71 has a shape extending downward with respect to the chassis frame CF in order to secure a welding area with the bumper stay 72. However, if the welding area with the bumper stay 72 is at a desired level, the mounting bracket 71 is extended. No shape may be used. The mounting bracket 71 has a first main body surface portion 71a and a second main body surface portion 71b, as in the first embodiment, but unlike the first embodiment, these 71a and 71b are separate from each other. Made of plate material. In the present embodiment, the first main body surface portion 71a and the second main body surface portion 71b are integrated by welding in a state of being adjacent to each other, but depending on the shape of the bumper stay 72, the second main body surface portion 71b is the first on the vehicle rear side. You may provide in the position away from the main body surface part 71a.

  Next, unlike the first embodiment, the hanging part 700 according to the third embodiment also fixes the mounting bracket 701 that fixes the cross member 5 to the chassis frame CF and the bumper unit 8 to the chassis frame CF. It has a configuration in which the bumper stay 702 is assembled.

  In the present embodiment, the bumper stay 702 is welded to the vehicle width direction outer side surfaces of the chassis frame CF and the vertical frame TF. Further, a mounting bracket 701 is welded to the bumper stay 702 so as to overlap the bumper stay 702 when viewed from the side of the vehicle. Similar to the second embodiment, the mounting bracket 701 includes a first main body surface portion 701a and a second main body surface portion 701b, and these 701a and 701b are made of different plate materials. In the present embodiment, each of the first main body surface portion 701a and the second main body surface portion 701b has a rectangular shape whose longitudinal direction is the vertical direction, but the second main body surface portion 701b is lower than the first main body surface portion 701a. It is provided and has a shape extending from the chassis frame CF. Since the second main body surface portion 701b extends downward, a large welding area is ensured for the bumper stay 702.

  Similar to the first embodiment, the hanging portions 70 and 700 according to the second embodiment and the third embodiment are located in front of the post 1 and the position overlapping the post 1 when viewed from the side of the vehicle. It is welded to the chassis frame CF, so that a desired welding area can be ensured and a certain level or more of strength against the rear impact load can be secured, and the number of mounting steps can be suppressed.

As described above, in each of the embodiments, in the vehicle including the load receiving platform lifting device 100, the bumper portion 8 is fixed to the chassis frame CF using the hanging portions 7, 70, 700. The rear impact load can be easily improved. When fulfilling this improvement, the design change of the load receiving platform lifting apparatus 100 can be avoided, an unnecessary weight increase can be suppressed, the efficiency of the lifting operation of the load receiving platform 3 in the load receiving platform lifting apparatus 100 can be maintained, and the load moving operation can be performed. Efficiency can be maintained.
Although each member is fixed using welding means, fastening means may be used instead of welding means as long as sufficient strength can be secured.

  In addition, the size of the overlapping portion between the mounting brackets 71 and 701 and the bumper stays 72 and 702 can be appropriately changed, and the same type of effect can be obtained as long as at least one portion overlaps the other.

  INDUSTRIAL APPLICABILITY The present invention is useful for all vehicles equipped with a load receiving platform lifting device that includes posts on the left and right rear portions of the vehicle, and the load receiving platform moves up and down along the posts.

DESCRIPTION OF SYMBOLS 1 Post 2 Slider 3 Cargo stand 4 Mounting member 5 Cross member 6 Hydraulic cylinder 7 Drop part 8 Bumper part 100 Cargo stand lift device T Vehicle CF Chassis frame TF Vertical frame

Claims (4)

In a vehicle equipped with a load receiving platform lifting device in which posts are fixed to left and right rear portions of a loading platform mounted on a chassis frame whose longitudinal direction is the vehicle longitudinal direction, and a load receiving platform is supported by a slider that moves up and down in the post,
A bumper part is provided via a hanging part fixed to the rear part of the chassis frame. The load receiving table elevating device has a cross member erected between the left and right posts,
The said hanging part has a connection part connected with the said cross member. The vehicle provided with the load receiving stand raising / lowering apparatus characterized by the above-mentioned. The hanging portion has an extending portion that extends downward with respect to the chassis frame and supports the bumper portion,
One of the said extension part and the said connection part is being fixed to the said chassis frame via the other. The vehicle provided with the load receiving platform raising / lowering apparatus of Claim 2. The vehicle including the load receiving platform lifting device according to claim 3, wherein the connecting portion and the extending portion are fixed to the chassis frame in a state where at least a part thereof overlaps in the vehicle front-rear direction.

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