JP6498007B2 - Loading platform lifting device - Google Patents

Description

  The present invention relates to a load receiving platform lifting apparatus including a load receiving platform that can move between a horizontal posture and a standing posture while moving up and down between a ground and a loading platform.

  As shown in FIG. 8 (a), for example, as shown in FIG. 8 (a), the load receiving table raising / lowering device can move up and down along posts 91 that are erected on the left and right sides at the rear of the vehicle, and stand up when not in use. What is held posture is known. The load receiving platform 92 is supported by a slider 91 a that protrudes rearward from the post 91 and is movable up and down via an attachment member 93.

  As shown in FIG. 8B, the load receiving platform 92 is provided with a plurality of convex portions 92 a to 92 e that serve as reinforcing materials for the metal plate 921 on the back surface. Each of these convex portions 92 a to 92 e is made of a channel material having a U-shaped cross section, and at least four convex portions 92 a to 92 d are circumferentially arranged so as to follow the back surface edge of the metal plate 921. In addition, the back surface of the metal plate 921 indicates a surface facing the ground in the horizontal posture or a surface facing the vehicle rear side in the standing posture.

  By using the channel material, as shown in FIG. 8C, which shows a cross-sectional portion of the load receiving base 92 with a solid line, the convex portions 92 c to 92 e form hollow closed spaces 920 c to 920 e to reduce the weight of the load receiving base 92. Also useful. Such convex portions 92a to 92e are employed not only in a configuration in which channel materials are individually welded to the metal plate 921, but also in a press-molded configuration (for example, Patent Document 1).

JP 2013-129375 A

  As shown in FIG. 8C, the load receiving base 92 whose posture is changed (arrow A91) is supported by the attachment member 93 on the rotation base end side (left side). It is designed so that the load resistance is larger than the rotation tip side (right side).

However, in reality, a load load more than expected is often applied to the load receiving platform 92, and such load load is generated many times when the load receiving platform lifting device is used for many years. With respect to such a load, the following characteristics and the like exist in particular in the load receiving platform elevating device, and thus attention has been paid to the need for further effective durability improvement.
The first characteristic is that there are many workers who bring the load to the rotation tip side of the load receiving platform 92.

  First, it is desirable that the load receiving platform 92 be close to the load receiving floor surface 94 just before it comes into contact with the loading platform floor surface 94 when it is raised to the same height as the loading platform floor surface 94. Therefore, if the baggage is brought too close to the base end portion 921a of the metal plate 921, an illusion that the baggage comes into contact with the vehicle side during the ascending is easy to remember, and the operator can easily place the baggage at a place away from the base end portion 921a. .

Next, there are many load receiving bases 92 in which a caster stopper is installed on the front end of the rotation for ensuring the safety of the load. This stopper prevents the load from falling from the rotating tip side, and the movement of the carriage can be restricted by bringing the caster of the carriage into contact with the stopper. Therefore, in order to contact this stopper, it is easy to place the load close to the rotation tip side.
The second characteristic is that the back surface of the receiving platform 92 is more likely to change with time than other parts.

  First, when loading and unloading a load, the load receiving platform 92 is lowered until the back surface is grounded. If the load is placed on the ground, it will be easily damaged because it comes into contact with the ground while being loaded.

  Next, when the load receiving table 92 is in direct contact with the ground wet with rainwater or the like, it is more likely to corrode than other parts that do not contact. In particular, corrosion is likely to proceed at the location where the above-described damage has occurred. In particular, the load receiving platform 92 that is changed in posture to be in a standing posture is likely to be directly covered with rainwater even when the vehicle is running. Furthermore, the progress of corrosion becomes conspicuous when it is washed with water.

  A load load is applied to a position near the rotation tip of the load receiving platform 92, and the load can be more than expected. On the other hand, the secular change of the convex part expected as a reinforcing member also proceeds.

Although it is necessary to make the support strength of the metal plate 921 strong and stable without being affected by these effects, if the entire structure of the convex portions 92a to 92e is simply strengthened, a large increase in weight is caused. This is not preferable because the vehicle fuel consumption and the allowable weight on the loading platform are reduced. In particular, in the load receiving platform 92 rotated from the horizontal posture to the standing posture, when the weight on the rotating front end side increases, the load related to the posture change of the load receiving platform 92 also increases.
The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a load receiving table lifting device including a load receiving table capable of improving durability and suppressing an increase in weight.

  In the present invention, the following means are adopted.

  The present invention is directed to a load receiving table lifting device that is supported by mounting members at both left and right ends and includes a load receiving table that can rotate between a horizontal posture and a standing posture with the mounting member as an axis center. In this load receiving platform lifting device, the load receiving stand includes a metallic plate material and a circumferential convex portion along the edge of the back surface portion of the plate material. The first convex mold part sandwiched between the mounting parts of the convex mold parts is a first wall body and a second wall body that are erected on the back surface part and have a lateral direction as a longitudinal direction, and the lateral direction. In the longitudinal direction, and is sandwiched between the first upper portion of the first wall body and the second upper portion of the second wall body, and the facing space between the first wall body and the second wall body is opened. And an opening portion that covers the opening portion. And, at least one of the first wall body or the second wall body, and a frame mold body is continuously provided on the back surface portion by the remaining portion different from the first convex mold portion of the convex mold portion, At least one of the first wall body or the second wall body is provided so as to be thicker than at least one of the plurality of wall bodies erected on the back surface portion in the remaining portion of the convex portion. Yes.

Here, the “opening portion” is sandwiched between the first wall body and the second wall body toward the vehicle rear side when the cargo receiving platform is attached to the vehicle rear side (mounted) and is standing. If the member installed in the above-mentioned opposing space as viewed from the rear of the vehicle, for example, a torsion bar is installed, the torsion bar can be visually recognized, and the operator can remove the torsion bar. It has a size that allows a hand to be inserted for grasping. In particular, it is preferable that the torsion bar gripped by the operator is of a size that can be easily pulled out of the first convex portion.
Next, the thickness of the cover portion can be configured to be smaller than at least one of the first wall body or the second wall body.

Further, the metallic plate member has a notch portion in which a corner portion on one end side in a direction orthogonal to the left-right direction is notched, and the load receiving platform includes the attachment member at the corner portion on the one end side. And at least one of the first wall body and the second wall body may be provided in a portion sandwiched between the cutout portions.
In addition, the load receiving platform may be configured such that a torsion bar that biases the rotation with the left-right direction as a longitudinal direction is provided in the facing region.

  At this time, the first convex portion has at least one of the first wall body or the second wall body, and a locking portion to which the torsion bar is locked, The structure provided in the intermediate part in the left-right direction is also possible.

  In addition, the frame mold body includes a second convex mold portion that is orthogonal to the first convex mold section and is provided on each of the left and right sides with the orthogonal direction as a longitudinal direction, and the first convex mold section in the orthogonal direction. And a third convex portion provided on the opposite side with the left-right direction as the longitudinal direction, and at least one of the first wall body or the second wall body is the wall body of the third convex portion. It is also possible to adopt a configuration in which the thickness is larger than that.

  According to the present invention, paying attention to the portion that is sandwiched between the mounting members and becomes the rotation base end side among the plurality of convex portions, the thickness of at least one of the first wall body or the second wall body that constitutes the portion With a large configuration, it is possible to improve the durability of the load receiving platform and to prevent a reduction in the efficiency of the rotating operation.

  Moreover, since the opening part is provided between the 1st wall body which makes the left-right direction of a load receiving table a longitudinal direction, and the 2nd wall body, the structure where the thickness of at least one of a 1st wall body or a 2nd wall body is large Even so, it is possible to prevent a large increase in weight in the receiving platform. And since a cover part covers an opening part, exposure of a 1st wall body or a 2nd wall body decreases, and the damage accompanying contact with the ground etc. also decreases.

  Furthermore, since at least one of the first wall body or the second wall body is formed by connecting the frame mold body on the back surface portion of the load receiving table together with the other mold portions, high durability performance may be exhibited in the entire load receiving table. it can.

It is the side view which shows the cargo receiving stand raising / lowering apparatus which concerns on 1st Embodiment, and the back view of a cargo receiving stand. It is a principal part perspective view of the cargo receiving stand raising / lowering apparatus which concerns on 1st Embodiment. It is principal part sectional drawing and the principal part enlarged view of the goods receiving stand which concern on 1st Embodiment. It is a lower stiffener sectional view of a receiving stand according to a second embodiment to a fourth embodiment. It is a lower stiffener sectional view of a receiving stand according to the fifth to seventh embodiments. FIG. 10 is a schematic diagram of a lower stiffener of a receiving platform according to an eighth embodiment to a tenth embodiment. It is a lower stiffener schematic diagram of the receiving stand which concerns on 11th Embodiment. It is a perspective view of the conventional cargo receiving table raising / lowering device, a back view of the cargo receiving table, and a side view of the main part.

  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 and what combined each embodiment suitably can also be implemented.

  First, the first embodiment will be described. Fig.1 (a) has shown the load receiving stand raising / lowering apparatus 100 mounted by the vehicle rear part. The load receiving platform lifting device 100 is supported by 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 freely movable up and down, and a lower end of the slider 2 so as to be rotatable. And a receiving platform 3. The loading platform 3 is moved up and down (arrow A1) between the ground and the loading platform 5 in the illustrated horizontal posture, and when the loading and unloading is finished and the vehicle is in a running state, the loading table 3 is moved from the horizontal posture to the standing posture. It is changed (arrow A2).

  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 1a 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 6. 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 guided downward, and is guided from the middle portion of the post 1 to the above-described hydraulic cylinder via the sheave C2 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 stand 3 has a plurality of stiffeners 301 to 305 as shown in FIG. The stiffeners 301 to 305 are reinforcing members that increase the load applied by the loaded luggage. In addition, the back surface part refers to the surface where the load receiving platform 3 in the horizontal posture faces the ground or the surface in which the load receiving platform 3 in the standing posture faces the rear of the vehicle.

  The load receiving platform 3 includes a metal plate 31 serving as a surface and the stiffeners 301 to 305 fixed to the metal plate 31, and the stiffeners 301 to 305 are provided so as to protrude from the metal plate 31. It is a convex part. Specifically, these stiffeners 301 to 305 include vertical stiffeners 301 and 302 fixed to the left and right ends, an upper stiffener 303 fixed to the upper end of the metal plate 31 and the left and right vertical stiffeners 301 and 302, and metal. A lower stiffener 304 provided at the lower end of the plate 31, and a middle stiffener 305 fixed to the left and right vertical stiffeners 301 and 302 between the upper stiffener 303 and the lower stiffener 304. As shown in the drawing, the vertical stiffeners 301 and 302 have the vertical direction as the longitudinal direction, and the remaining three stiffeners 303 to 305 have the horizontal direction as the longitudinal direction.

  These stiffeners 301 to 305, particularly the vertical stiffeners 301 and 302, the upper stiffener 303, and the lower stiffener 304 that are arranged along the edge of the metal plate 31 and arranged circumferentially, It is the structure which gives the rigidity along a direction and the left-right direction, and can obtain predetermined durability. In addition, in the state surrounded by the reinforcing brackets 306 and 307 having the substantially U-shaped portion where the vertical stiffeners 301 and 302 and the lower stiffener 304 are connected to the left and right ends of the lower side of the load receiving table 3 shown in the figure. An attachment member 4 is provided. The reinforcing brackets 306 and 307 are also convex portions with substantially U-shaped portions standing on the metal plate 31. In addition, triangular corner stiffeners 308 and 309 are provided at the connecting portion between the vertical stiffeners 301 and 302 and the lower stiffener 304 to increase the connection strength. The corner stiffeners 308 and 309 also have a wall (not shown) standing on the metal plate 31 and a triangular plate (a portion shown in the figure) that is bent with respect to the wall. It is.

  The tow stand 3 is provided with two torsion bars 71 and 72 for biasing the posture change from the horizontal posture to the standing posture in a state of being housed in the lower stiffener 304 between the left and right attachment members 4. One end of the left torsion bar 71 is fixedly supported by the left mounting member 4, and the other end is locked to a locking bracket 304 a having a width Wa in the lower stiffener 304. One end of the right torsion bar 72 is fixedly supported by the right mounting member 4, and the other end is locked to a locking bracket 304 b having a width Wb in the lower stiffener 304. Since the attachment member 4 is fixed to the slider 2, it is not affected by the posture change of the load receiving platform 3 and maintains the same posture without rotating. On the other hand, since the locking brackets 304a and 304b rotate with the change in the posture of the load receiving base 3, the other end portions of the torsion bars 71 and 72 locked to the locking brackets 304a and 304b rotate. That is, a twisting force is generated in the torsion bars 71 and 72 in accordance with the change in the posture of the load receiving platform 3. In this embodiment, the torsion bars 71 and 72 are provided so that no twisting force is generated when the load receiving platform 3 is in the standing posture, and the twisting force is generated when the posture is changed from the standing posture to the horizontal posture. .

  The lower stiffener 304 in which the torsion bars 71 and 72 are installed has a different configuration from the other stiffeners 301, 302, 303, and 305 in order to improve the durability of the load receiving table 3. The configuration will be specifically described with reference to FIG. In FIG. 2, the torsion bars 71 and 72 are omitted for convenience of explanation.

  As shown in FIG. 2A, the lower stiffener 304 includes a first plate 3041 having a longitudinal direction in the left-right direction, a second plate 3042 having a longitudinal direction in the left-right direction below the first plate 3041, and The cover part 3043 which covers the 1st plate 3041 and the 2nd plate 3042 is comprised.

  The first plate 3041 is made of a metal plate, and is erected in a fixed state by welding as a wall body substantially perpendicular to the back surface of the metal plate 31. As shown in FIG. 2B, the first plate 3041 is provided so as to have a height H1 up to the protruding end 3041a which is the upper part of the wall, and the left end 3041b in the longitudinal direction is fixed to the reinforcing plate 306. The corner stiffener 308 is fixed to the upper surface of the left end portion 3041b (the surface facing the upper side in the figure). Although not illustrated, the right end portion in the longitudinal direction is also fixed to the reinforcing plate 307 in the same manner as the left end portion 3041b, and the corner stiffener 309 is fixed to the upper surface thereof. Therefore, the first plate 3041 is connected to the vertical stiffeners 301 and 302 via the reinforcing plates 306 and 307 and the corner stiffeners 308 and 309, and further the upper stiffener 303 connected to the vertical stiffeners 301 and 302. Then, a frame-type body (circumferential portion indicated by a virtual line V1 indicated by a one-dot chain line) is formed on the metal plate 31. That is, the load applied to the first plate 3041 can be distributed to other stiffeners 301, 302, 303, and the like.

  The second plate 3042 is also made of a metal plate, and is erected in a fixed state by welding as a wall body substantially perpendicular to the back surface portion of the metal plate 31 and faces the first plate 3041 in a horizontal state. Therefore, the second plate 3042 forms an opening S1 over the range of the length W1 in the left-right direction between the second plate 3042 and the first plate 3041. The second plate 3042 is provided so as to have a height H2 that is substantially the same height as the height H1 up to the protruding end portion 3042a that is the upper portion of the wall, and the left and right end portions along the longitudinal direction are provided. It is fixed to the reinforcing plates 306 and 307. Therefore, the second plate 3042 is a frame-shaped body (indicated by a two-dot chain line) with respect to the metal plate 31 by the vertical stiffeners 301 and 302 and the upper stiffener 303 via the reinforcing plates 306 and 307 and the corner stiffeners 308 and 309. As with the first plate 3041, the load applied to the second plate 3042 can be distributed to other stiffeners 301, 302, 303, and the like. In addition, the length (length in the vertical direction in the drawing) L1 of the opening portion in the opening S1 is set to be larger than both the heights H1 and H2 of the first plate 3041 and the second plate 3042, When the stand 3 is in the standing posture, the opening S1 sandwiched between the protruding end portions 3041a and 3042a, which is the upper part of the wall body, mainly forms a facing space where both plates 3041 and 3042 face each other on the vehicle rear side. It becomes the state open | released in the direction (Y direction) of arrow RS1.

  The cover portion 3043 includes a portion of the upper surface of the first plate 3041 excluding the fixing portion of the corner stiffeners 308 and 309, a lower surface of the second plate 3042 (a surface facing downward in the drawing), and an opening S1. And a metal plate that is bent in a substantially U shape with the left-right direction as the longitudinal direction. The cover 3043 is fastened to each of the first plate 3041 and the second plate 3042 in a state of covering the opening S1. The cover portion 3043 has substantially the same length as the width W1 of the opening S1, but a portion corresponding to the position is notched in order to avoid interference with the corner stiffeners 308 and 309. By providing the cover portion 3043, the first plate 3041 and the second plate 3042 are also covered. Accordingly, the width of the lower stiffener 304 is substantially the same as the width W1 of the opening S1.

Next, the thickness of the members constituting the lower stiffener 304 will be described with reference to FIG. 3 while comparing with other stiffeners and the like. In this figure, the torsion bars 71 and 72 are omitted for convenience of explanation.
FIG. 3A shows a PP cross-sectional portion, a QQ cross-sectional portion, and an RR cross-sectional portion viewed from the arrow direction in FIG.

  The thicknesses of the first plate 3041 and the second plate 3042 are t1 (about 9 mm) and t2 (about 9 mm), respectively, and are larger than the thickness t3 (about 3 mm) of the metal plate 31. One locking bracket 304b is fixed to the first plate 3041 and the metal plate 31 by welding to the thick first plate 3041 and second plate 3042, and the other locking bracket 304a is fixed to the first plate 3041. It is fixed to 3041, the second plate 3042, and the metal plate 31 by welding. The other ends of the torsion bars 71 and 72 are inserted into the closed spaces 304aR (QQ cross section) and 304bR (PP cross section) of the locking brackets 304a and 304b shown in the drawing to be locked. A bolt insertion hole (not shown) for fastening the cover portion 3043 is provided on the upper surface of the first plate 3041 and the lower surface of the second plate 3042, and the nut N1 positioned in the bolt insertion hole, N2 is welded. As can be seen from the RR cross section, both plates 3041 and 3042 face each other through an opening S1 sandwiched between the protruding end portion 3041a of the first plate 3041 and the protruding end portion 3042a of the second plate 3042. The opposing space SL formed is opened mainly in a direction (arrow RS1) that intersects the metal plate 31 substantially perpendicularly.

  In addition, as shown in FIG. 3B, which shows a cross-sectional portion of the cargo receiver 3, the cover portion 3043 has a large and thin shape compared to the first plate 3041, and the thickness thereof is set to t4 (about 2.0 mm). Has been. When the cover portion 3043 is fastened, the inner side of the lower stiffener 304 is also a closed space 304R.

  On the other hand, as with the lower stiffener 304, the upper stiffener 303 and the middle stiffener 305 whose longitudinal direction is the left-right direction are made of metal having a substantially L-shaped section and a substantially U-shaped section that are bent as shown in FIG. The channel material is fixed to the metal plate 31 to form closed spaces 303R and 305R.

  The upper stiffener 303 has a wall body 3031 erected with respect to the back surface portion of the metal plate 31, and a bent body 3032 that is bent with respect to the wall body 3031. It is fixed to the bent tip 311. The thicknesses of the wall body 3031 and the bent body 3032 are both t5 (about 2.5 mm).

  The middle stiffener 305 includes an upper wall body 3051 erected with respect to the metal plate 31, a bent body 3052 that is bent with respect to the upper wall body 3051 and faces the back surface of the metal plate 31, and the bent body 3052. A lower wall body 3053 which is bent toward the metal plate 31 and is erected on the metal plate 31. Each of the upper wall body 3051, the bent body 3052, and the lower wall body 3053 has a thickness of t6 (about 2.5 mm).

  Comparing the three stiffeners 303 to 305, only the lower stiffener 304 is formed with the metal plate 31 and the closed space 304R by using the cover portion 3043, and the first plate 3041 and the second plate 3042 which are wall bodies are formed. The thickness of the cover portion 3043 is also different. In addition, the first plate 3041 and the second plate 3042 are thicker than the other wall bodies 3031, 3051, and 3053, as wall parts that are directly fixed to the metal plate 31. Further, the lower stiffener 304 is different from the upper stiffener 303 and the middle stiffener 305 in that the first plate 3041 and the second plate 3042 are covered by the cover portion 3043 and the exposed area is small.

  In the load receiving platform 3 that can change its posture between a horizontal posture and a standing posture (rotatable), a lower stiffener 304 provided at a portion on the rotation proximal end side is erected over the entire left and right direction. Since the plate 3041 and the second plate 3042 are thick, the support strength for the metal plate 31 is high. That is, the metal plate 31 has a higher support strength than the portion where the upper stiffener 303 and the middle stiffener 305 are provided, as much as it is thickened. Further, an opening S1 is provided across the width W1 between the thick first plate 3041 and the second plate 3042, and folding bodies 3032 and 3052 such as the upper stiffener 303 and the middle stiffener 305 are omitted. . Therefore, even if the thicknesses t1 and t2 of the first plate 3041 and the second plate 3042 are large, an increase in weight can be suppressed by the omission of portions corresponding to the bent bodies 3032 and 3052. In particular, since the length L1 (see FIG. 2B) of the opening S1 is larger than the heights H1 and H2 and is a size extending over the width W1, the suppression effect is great. In the present embodiment, the thicknesses of the first plate 3041 and the second plate 3042 are t1 and t2, respectively, but the thickness may be appropriately changed according to the desired support strength. At that time, the heights H1 and H2 may be appropriately changed in accordance with the weight change accompanying the change in thickness.

Furthermore, since the closed portion 304R is formed by fastening the cover portion 3043 so as to cover the opening portion S1, when the metal plate 31 receives a load, the first plate 3041 and the second plate 3042 It is possible to prevent the upper wall portions 3041a and 3041b (see FIG. 2B) from being bent away from each other. The cover portion 3043 has a thickness t4 smaller than that of the first plate 3041 and the second plate 3042, and further smaller than the thicknesses t5 and t6 of the upper stiffener 303 and the middle stiffener 305, so that the cover portion 3043 is opened. Even if the portion S1 is covered, the increase in weight can be suppressed. In other words, the lower stiffener 304 causes the metal plate 31 to have high durability such that the first plate 3041 and the second plate 3042 having a large thickness form the above-described frame type body (see FIG. 2B). The cover portion 3043 contributes to suppression of bending of the first plate 3041 and the second plate 3042.

  The vertical stiffeners 301 and 302 also have a substantially U-shaped cross section like the middle stiffener, and the wall body 3021 shown in FIG. 3C standing on the metal plate 31 has a thickness t7 (about 2). 0.5 mm). Even compared with this thickness t7, the thicknesses of the first plate 3041 and the second plate 3042 are large.

  Since the thickness of the first plate 3041 and the second plate 3042 is larger than the thickness of at least the walls of the other stiffeners 301, 302, 303, 305, the load receiving platform 3 emphasizes the durability of the rotation base end side. And an unnecessary increase in weight can be suppressed. Furthermore, since the rotation front end side is lighter than the rotation base end side, it is possible to suppress a load applied to the posture changing operation between the horizontal posture and the standing posture, such as when the operator holds and rotates the hand. Regarding the load suppression of this posture change, the wall body 3021 of the vertical stiffeners 301 and 302 has a uniform thickness in the longitudinal direction, and further, the upper stiffener 303 and the middle stiffener 305 are portions away from the rotation base end side. Therefore, the low stiffener 304 is effective in having the above-described configuration. That is, when the thicknesses of these stiffeners 301, 302, 303, and 305 are increased, it is possible to avoid a significant increase in weight on the rotating tip side and an increase in the load related to the change in the posture of the load receiving platform 3.

  Since the cover portion 3043 is fixed by fastening, the cover portion 3043 can be easily removed by releasing the fastening. At this time, since the cover portion 3043 has a thin shape, the feeling of weight is suppressed even if the operator holds it in his hand.

  Further, since the first plate 3041 and the second plate 3042 are covered by the cover portion 3043, even when the back surface of the load receiving platform 3 is grounded to the ground when loading and unloading, these plates 3041 and 3042 remain on the ground. There is no direct contact. Therefore, unlike the other stiffeners 301, 302, 303, 305, the first plate 3041 and the second plate 3042 are not damaged by contact with the ground. Therefore, since corrosion does not occur due to rain water, washing water, or the like, and corrosion does not proceed from the damaged portion, the aging of the first plate 3041 and the second plate 3042 that are the reinforcing members of the metal plate 31 is avoided. Changes can also be suppressed. Note that when the cover portion 3043 is damaged or the like, only the cover portion 3043 may be replaced.

Further, when the cover portion 3043 is removed, the facing space SL (see FIG. 3A) is opened through the opening S1. At this time, the torsion bars 71 and 72 are provided in the facing space SL, and since the facing space SL is largely open, maintenance can be performed on the torsion bars 71 and 72. Further, the torsion bars 71 and 72 can be easily replaced. In particular, it is preferable that the torsion bars 71 and 72 have a small diameter so as to easily generate the twisting force and are elongated so as to have high durability. Therefore, the opening S1 is formed over the width W1, and the opening S1 is sized so that at least the torsion bars 71 and 72 can be easily taken out (for example, the long torsion bars 71 and 72 do not interfere with the end of the opening S1). If it has a size that can be taken out, the maintenance work and the exchange work are simplified, and the effect becomes remarkable.
Moreover, when opening part S1 is provided, there also exists an effect of the manufacturing cost reduction of the receiving stand 3.

  First, the welding operation of the first plate 3041 to the metal plate 31 can be performed from either the upper surface 3041U or the lower surface 3041D (see FIG. 3B), and is simpler than the upper stiffener 303 and the middle stiffener 305. It becomes. In this embodiment, the welding operation is performed on the upper surface 3041U. However, the welding operation may be performed on the lower surface 3041D in accordance with the size and shape of the cover portion 3043. Further, welding work can be performed on both sides of the upper surface 3041U and the lower surface 3041D. In addition, about these welding amounts and welding location, it sets suitably suitably that the deformation | transformation of the metal plate 31 does not arise. The same applies to the second plate 3042.

  Next, the welding work of the locking brackets 304a and 304b provided between the first plate 3041 and the second plate 3042 is also simplified. Since both brackets 304a and 304b can be welded to the metal plate 31 through the opening S1, both the brackets 304a and 304b can be welded after the welding of the plates 3041 and 3042 is completed. This is simpler than the case where the part S1 is closed.

  The locking brackets 304a and 304b also have an effect of improving the degree of freedom in installing the torsion bars 71 and 72 based on the thickening of the first plate 3041 and the second plate 3042.

  The torsion bars 71 and 72 are twisted when the posture of the load receiving platform 3 is changed. At this time, the load accompanying generation | occurrence | production of torsional force is applied to locking bracket 304a, 304b. This load is transmitted from the locking brackets 304 a and 304 b to the first plate 3041. The thick first plate 3041 and the other stiffeners 301, 302, 303, etc. are connected to the frame mold body, so that the load caused by the twisting force of the torsion bars 71, 72 in the entire frame mold body You can also receive. Since the corner stiffeners 308 and 309 are also fixed to the first plate 3041, the durability of the lower region (region of width W11) is relatively high, but the first plate 3041 itself due to the thickening is increased. Based on the durability and the durability of the frame mold body, the installation portions of the locking brackets 304a and 304b can be set within the range of the intermediate portion (region of width W12) other than the lower region. That is, since the positions of the locking brackets 304a and 304b are not limited, the degree of freedom regarding the design and storage of the torsion bars 71 and 72 is increased.

  In addition, a notch U1 having a width W13 is provided at both the left and right ends of the metal plate 31 at the corner of the load receiving table 3, specifically, at the rotation base end side of the load receiving table 3. An attachment member 4 (see FIG. 1B) is provided in the notch U1. By providing the attachment member 4 according to the notch U1, the answer base end side of the load receiving platform 3 can be brought close to the load platform floor surface. Since the thick first plate 3041 and the second plate 3042 are provided in a region (rotation base end side) sandwiched between the left and right cutouts U1, it is possible to suppress a reduction in strength of the metal plate 31. . In particular, in the present embodiment, since both the first plate 3041 and the second plate 3042 are provided adjacent to the notch U1, the effect becomes remarkable.

  As described above, in the present embodiment, the thickness t1 of the first plate 3041 and the thickness t2 of the second plate 3042 are the same, but they may be different. However, at least one of them and the one constituting the frame type body is thicker than the channel material constituting the other stiffeners 301, 302, 303, 305 or its wall bodies 3031, 3051, 3052, etc. Shall. Furthermore, the thicknesses t1 and t2 of the first plate 3041 and the second plate 3042 are not limited to be larger than those of all the channel members, and the durability on the rotation base end side of the load receiving base 3 is emphasized. The thickness may be larger than at least one of the other stiffeners 301, 302, 303, and 305 as long as the efficiency of the rotation operation of the load receiving platform 3 is not lowered. . In addition, although both plates 3041 and 3042 are configured to form a frame type body (virtual lines V1 and V2), the frame type body may be configured by only one of them.

  In this embodiment, the lower stiffener 304 is provided with a flat plate (first plate 3041 and second plate 3042), one on each of the upper and lower sides. However, the wall has a thickened wall and increases the weight. Any other configuration may be used as long as the opening to be suppressed is provided.

Therefore, the configuration of another lower stiffener will be described with reference to FIG. Note that FIG. 4 shows a QQ cross-sectional portion similarly to FIG. 3A, and will be described with a focus on portions different from the embodiment described above with reference to FIG.
As shown in FIG. 4A as a second embodiment, a configuration having a channel material B3040 having a substantially U-shaped cross section may be adopted.

  The channel material B3040 includes an upper wall body B3041 erected with respect to the metal plate 31, a bent body B3042 that is bent with respect to the upper wall body B3041 and is in contact with the metal plate 31, and a metal plate further from the bent body B3042. 31 and a lower side wall body B3043 that is bent so as to stand upright. In the channel material B3040, a bent body B3042 is fixed to the metal plate 31, and an opening S1 similar to that in the first embodiment is also formed. The upper wall body B3041, the bent body B3042, and the lower wall body B3043 have a thickness t201 that is thinner than the thickness t1 of the first plate 3041 according to the first embodiment.

  Since the bent body B3042 is provided in contact with the metal plate 31, an effect of suppressing the load applied from the torsion bar 71 to the locking bracket 304a with the change in the posture of the load receiving platform 3 is produced as compared with the first embodiment. In addition, since the thickness t201 is thinner than the thickness t1, even if the bent body B3042 is provided over the width W1, an increase in weight can be suppressed as compared with the case where the bent body B3042 is provided as it is.

  Next, as shown in FIG. 4B as the third embodiment, a wall body is formed upright with respect to the metal plate 31 similarly to the first plate 3041 and the second plate 3042 according to the first embodiment. The first plate C3041 and the second plate C3042 may be provided, and a contact plate C3043 that contacts the metal plate 31 may be provided between the plates C3041 and C3042.

  In the present embodiment, the first plate C3041 and the second plate C3042 can have the same thickness t1 as the first plate 3041 according to the first embodiment, and the thickness of the third plate C3043 can be smaller than the thickness t201 of the second embodiment. . That is, the thickness of each plate can be adjusted according to the desired durability. With this configuration, it is possible to suppress an increase in weight associated with the third plate C3043 provided over the width W1 while suppressing the load applied to the locking bracket 304a as in the second embodiment.

  In addition, as shown in FIG. 4C as the fourth embodiment, a first plate D3041 and a second plate D3042 which are erected with respect to the metal plate 31 are provided. Of these plates D3041 and D3042, the metal plate Alternatively, the end portions D3041b and D3042b opposite to the fixed end portions D3041a and D3042a fixed to 31 may be bent.

  Since the first plate D3041 and the second plate D3042 are bent, higher strength can be obtained with respect to the metal plate 31 than the first plate 3041 and the second plate 3042 according to the first embodiment. On the other hand, the opening S2 sandwiched between the end portions D3041b and D3042b serving as the protruding end portions of both plates 3041 and 3042 has an opening portion length L2, which is greater than the same length L1 of the first embodiment. Similarly, the opening S2 is formed over the width W1, so that the facing space SL can be opened and an effect of suppressing an increase in weight can be obtained. Moreover, it contributes to the maintenance work of the torsion bars 71 and 72 or the simplification of the replacement work.

  As described with reference to FIG. 4, the openings can be appropriately changed as long as the openings S <b> 1 and S <b> 2 that can suppress an increase in the weight of the load receiving platform 3 and a desired support strength can be obtained for the metal plate 31.

  Further, another embodiment can be adopted as the wall body standing on the metal plate 31. These embodiments will be described with reference to FIG. 4 shows the QQ cross-sectional portion in FIG. 3A as in FIG. 4, and the description will focus on portions different from the embodiment described above with reference to FIG.

  As shown in FIG. 5A as the fifth embodiment, the first metal plate E3041 and the second metal plate E3042 are erected in a state where the metal plate 31 overlaps the metal plate 31, and the third plate is disposed below the third metal plate. A configuration in which the plate E3043 is erected may be employed. Each of the plates E3041 to E3043 has the same thickness, but the upper plate unit in which the first plate E3041 and the second plate E3402 are overlapped has a thickness of t301 and has a high support strength with respect to the metal plate 31.

  Further, as shown in FIG. 5B as the sixth embodiment, a first plate F3041 which is folded back with respect to the metal plate 31 and has a substantially U-shaped cross section is fixed in an upright state. A second plate F3042 similar to that of the first embodiment is fixed below the second plate F3042. Since the first plate F3041 is folded, the metal plate 31 has high support strength.

Furthermore, as shown in FIG. 5C as the seventh embodiment, a wall body G30411 erected with respect to the metal plate 31 and a region that is bent with respect to the wall body G30411 and is above the opening S1. The first plate G3041 having a bent body G30412 that contacts the metal plate 31 and having a substantially L-shaped cross section may be provided.
At this time, the cover portion 3043 may cover the wall body G30411 but not the bent body G30412.

  Although the weight of the first plate G3041 increases by having the bent body G30412, the thickness t501 of the first plate G3041 is made thinner than the thickness t1 of the first embodiment as in the second embodiment. Increase in weight can be suppressed. Further, the bent body G30412 can suppress the bending of the metal plate 31 in the region sandwiched between the lower stiffener 304 and the middle stiffener 305. In particular, the effect is remarkable in terms of the characteristics of the load receiving platform lifting apparatus 100 in which a load is easily placed near the turning tip. If the weight increase based on the thickness t501 of the first plate G3041 is suppressed, the length of the bent body G30412 in the vertical direction in the drawing may be set to a size that reaches the middle stiffener 305.

  The openings S1 and S2 have a width W1 that is substantially the same as the length in the longitudinal direction of the lower stiffener 304 in order to obtain the maximum weight suppression effect. However, unlike the other stiffeners 303 and 305, etc. If the weight suppressing effect can be obtained even if the thickness of the openings is increased, the widths of the openings S1 and S2 can be applied even if the width is not the maximum.

  Specifically, in the eighth embodiment shown in FIG. 6A, connection brackets H304a and H304b for connecting the first plate H3041 and the second plate H3042 are provided. In this embodiment, these connection brackets H304a and H304b are welded to both the first plate H3041 and the second plate H3042, but may be fastened with bolts or the like.

  The connecting brackets H304a and H304b have widths W11 and W12 that are substantially the same as the widths Wa and Wb of the locking brackets 304a and 304b, respectively, and extend in the vehicle longitudinal direction (Y-axis direction) with the locking brackets 304a and 304b. It is provided to line up. Although locally, the first plate H3041 and the second plate tH3042 are connected, the durability of the metal plate 31 can be improved. As shown in the drawing, the facing space between the first plate H3041 and the second plate H3042 is largely opened by the three openings S81 to S83. In addition, the connection brackets H304a and H304b are not separated from the opposing regions of the first plate H3041 and the second plate H3042, and the protruding end portions H30411 that are the upper portions of the wall bodies of the first plate H3041 and the second plate H3042 are provided. Since it is provided so as to be hung on the portion of H30421 and is not provided over the protruding direction (Y direction), an increase in weight due to the installation of the connecting brackets H304a and H304b is suppressed. In addition, regarding the opening widths W81 to W83 by these openings S81 to S83, as in the other embodiments, the effect of suppressing the increase in weight associated with the thickening of the first plate H3041 or the second plate H3042, the plates H3041 and H3042 As long as at least one of the simple effects of the welding work or the welding work of the locking brackets 304a and 304b and the simple effect of the maintenance or replacement work of the torsion bar can be obtained, it can be appropriately changed. Note that the mounting positions of the connecting brackets H304a and H304b can be changed as appropriate.

  Moreover, as 9th Embodiment shown in FIG.6 (b), it is good also as a structure which serves as locking bracket I304a, I304b instead of the connection bracket H304a, H304b which concerns on 8th Embodiment. Each of the locking brackets I304a and I304b has a configuration in which opening-side plate portions I3041a and I3041b are provided so as to connect the protruding end portions I30411 and I30421 that are the upper portions of the walls of the first plates I3041 and I3042. Thus, the same effect as in the eighth embodiment can be obtained.

  As a tenth embodiment, a center vertical stiffener J306, which is a known member, may be welded to the first plate J3041, the middle stiffener 305, and the back surface of the metal plate 31 as shown in FIG. 6C. In the present embodiment, in order to obtain the weight suppressing effect of the load receiving platform 3, the central vertical stiffener J306 is not provided between the upper stiffener 303 and the middle stiffener 305, but according to the size of the load receiving platform 3. It is also possible to adopt a configuration provided between them.

Further, as shown in FIG. 7 as the eleventh embodiment, a connection bracket K304a that is hung on the protruding end portions K30411 and K30421 of the first plate K3041 and the second plate K3042, and the upper surface of the first plate K3041. And the structure provided with the bending plate K304b fixed to the back surface part of the metal plate 31 is also applicable. Also in the present embodiment, the facing space in which the first plate K3041 and the second plate K3042 are opposed to each other is wide open to the left and right except for the connecting bracket K304a located at the substantially central portion in the width direction of the load receiving platform 3. It is opened by the openings S111 and S112.
Each member in the present embodiment has a different thickness and will be described with reference to FIG.

  First, although the thickness t111 (about 6 mm) of the first plate K3041 is smaller than the thickness t112 (about 9 mm) of the second plate K3042, other stiffeners 301, 302, 303, 305 and the metal plate 31 are used. The shape is larger than the thickness. That is, similarly to the other embodiments, the lower stiffener 304 has a higher durability than the other stiffeners 301, 302, 303, and 305 with respect to the load applied to the metal plate 31 from luggage or the like. . In addition, the formation of large openings S111 and S112 whose longitudinal direction is the width direction of the load receiving platform 3 also has an effect of suppressing the increase in weight as in the other embodiments.

  Next, the connection bracket K304a is set to have a thickness t113 (about 3 mm) smaller than the thicknesses of the first plate K3041 and the second plate K3042, thereby avoiding a significant increase in weight.

  Furthermore, the thickness t114 (about 3 mm) of the bending plate K304b is set smaller than the thicknesses of the first plate K3041 and the second plate K3042. The wall body surface portion K3041b erected with respect to the metal plate 31 and the inclined surface portion K3042b which is folded back toward the metal plate 31 with respect to the wall body surface portion K3041b and has a substantially V-shaped cross section. The wall surface portion K3041b is welded to the metal plate 31 and the upper surface of the first plate K3041, and the inclined surface portion K3042b is welded to the metal plate 31.

In the present embodiment, the first plate K3041 has a smaller thickness than the second plate K3042, and the bent plate K304b has a smaller thickness, thereby suppressing the increase in weight as in the other embodiments. It also has.
In the present embodiment, the cover portion K3043 has a shape that also covers the bending plate K304b.

  In this embodiment, the second plate K3042 is thicker than the first plate K3041, but the lower stiffener 304 has a greater support strength with respect to the metal plate 31 than the other stiffeners 301, 302, 303, 305. If it has, it may be the same thickness as the first plate K3041 or a small thickness. The bending plate K304b has a shape having a substantially V-shaped cross section, but may have another cross section shape as long as it has an effect of suppressing an increase in weight. In the present embodiment, both the connection bracket K304a and the bending plate K304b are included. However, only one of them may be provided.

  Like the lower stiffener 304 according to each of the above-described embodiments, the support strength for the metal plate 31 is improved compared to the other stiffeners 301, 302, 303, and 305, while the upper wall body and the lower wall body. Other configurations are applicable as long as at least the upper portions of the wall bodies are configured by sandwiching the openings S1 and S2 so as to suppress an increase in weight due to the improvement of the support strength. At this time, press forming or the like may be used to form the first plates F3041 and G3041 which are bent as in the sixth embodiment and the seventh embodiment. In addition, although the upper wall body and the lower wall body are separated from each other, a configuration in which ribs or the like installed on both wall bodies may be provided. At this time, the number of ribs and a structure which can avoid the big increase of the weight of the cargo receiving stand 3, or the number and a structure of the grade which does not inhibit simplicity, such as replacement | exchange of the torsion bars 71 and 72, should just be sufficient.

As for the locking brackets 304a and 304b provided between the opposing upper and lower walls constituting the lower stiffener 304, it is secured to both the upper wall and the lower wall, or both. It is good also as a structure fixed to the wall body from which each differs.
In addition, the fixing of each part in each embodiment is not limited to welding means, and fastening means using bolts or nuts, screws or the like may be used.

  Regarding the attachment of the cover parts 3043 and K3043, not only the openings S1 and S2 but also the first plate and the second plate are covered, but the first plate and the second plate are more convex than the vertical stiffeners 301 and 302. If the lower stiffener 304 is slightly separated from the ground when the load receiving platform 3 is grounded, such as a small projecting height, the cover 3043 may be attached so as to cover only the openings S1 and S2.

  Further, as described above, the cover portions 3043 and K3043 are provided in the respective embodiments. However, the lower stiffener 304 is made of metal than the other stiffeners 301, 302, 303, and 305 as compared with the secular change due to corrosion or the like. In the case where the effect of providing a high support strength for the plate 31 is large, the cover portions 3043 and K3043 may not be provided and the first plate and the second plate may be exposed.

  In addition, the members (for example, the eighth embodiment or the eleventh embodiment) laid on the first plate and the second plate are provided in the center portion in the width direction of the load receiving platform 3, and are not limited to the center portion. As long as the load is difficult to disperse in the vertical stiffeners 301 and 302 as compared with the left and right end portions in the width direction, the vertical stiffeners 301 and 302 can be appropriately installed in a portion away from the central portion in the left and right direction.

  In each embodiment, the description has been given using the load receiving platform lifting device 100 that moves up and down with the slider 2 in the pair of left and right posts 1 at the rear end of the vehicle. However, the load receiving platform 3 supports the support portions that support both ends. In other configurations, for example, a load receiving table lifting device in which the load receiving table is moved up and down by a parallel link arm can be applied.

  INDUSTRIAL APPLICABILITY The present invention is useful for a load receiving table lifting apparatus having a load receiving table that is supported at both left and right ends and changes its posture between a horizontal posture and a standing posture.

DESCRIPTION OF SYMBOLS 1 Post 2 Slider 3 Load receiving stand 4 Mounting member 5 Cross member 6 Hydraulic cylinder 31 Metal plate 301,302 Vertical stiffener (convex type part)
303 Upper stiffener (convex part)
304 Loastifna (convex part)
305 Middle stiffener (convex part)
306, 307 Reinforcement brackets 308, 309 Corner stiffener 3041 First plate (first wall)
3042 Second plate (second wall)
3043 Cover part 3041a The protruding end part (first upper part) of the first plate
3042a Protruding end of second plate (second upper part)
304a, 304b Locking brackets 71, 72 Torsion bar S1 Opening (opening)
100 Loading platform lifting device

Claims (6)

In the load receiving platform lifting apparatus provided with a load receiving platform supported by mounting members at both left and right ends and rotatable between a horizontal posture and a standing posture around the mounting member as an axis,
The load receiving platform has a metallic plate material and a circumferential convex portion along the edge of the back surface portion of the plate material,
The circumferential convex portion is different from the first convex portion, which is sandwiched between the mounting portions of the convex portions and has a left-right direction as a longitudinal direction, and the first convex portion. With a convex rest,
The first convex portion is erected on the back surface and has a first wall body and a second wall body with the left-right direction as a longitudinal direction, and the first wall body with the left-right direction as a longitudinal direction. An open portion that is sandwiched between the first upper portion and the second upper portion of the second wall body and that opens an opposing space between the first wall body and the second wall body, and is detachable to cover the open portion A cover portion,
The remaining portion includes a wall body standing on the back surface portion, and a bent body formed by being bent with respect to the wall body,
Frame type body is continuously provided with at least one of the first wall or the second wall, the rear surface portion at the front chopped section,
Furthermore at least one of the first wall or the second wall body, receiving platform lifting device, characterized in that the wall and folding thickness than body before Symbol balance is provided to be larger. The load receiving platform elevating device according to claim 1, wherein a thickness of the cover portion is smaller than at least one of the first wall body or the second wall body. The metallic plate material has a notch formed by notching a corner on one end side in a direction orthogonal to the left-right direction,
The load receiving platform is supported via the attachment member at a corner on the one end side,
The at least one of the first wall body or the second wall body is provided in a portion sandwiched between the cutout portions. The load receiving table elevating device according to claim 1. The load receiving table lifting device according to any one of claims 1 to 3, wherein in the load receiving table, a torsion bar for urging the rotation with the left-right direction as a longitudinal direction is provided in the facing region. . The first convex part has at least one of the first wall or the second wall, and a locking part to which the torsion bar is locked,
The locking portion is provided at an intermediate portion in the left-right direction.
The load receiving table lifting device according to claim 4. The frame mold body is perpendicular to the first convex mold part and has a second convex mold part provided on each of the left and right with the orthogonal direction as a longitudinal direction, and the opposite side of the first convex mold part in the orthogonal direction. And a third convex part provided with the left-right direction as the longitudinal direction,
4. The device according to claim 1, wherein at least one of the first wall body or the second wall body is provided to have a thickness larger than that of the wall body of the third convex portion. Cradle receiving device lifting device according to the above.

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