JP4037400B2 - Retractable loading platform lifting device - Google Patents

Description

  The present invention relates to a load receiving device lifting / lowering device that supports a loading / unloading operation of a load on a vehicle loading platform, and more particularly to a retractable load receiving device lifting / lowering device that can be stored in a lower portion of a vehicle.

  The load receiving platform lifting / lowering device lifts and lowers the load receiving platform between the height of the loading platform floor of the vehicle and the height of the ground, and supports loading and unloading work on the loading platform of the vehicle. There are various types of such load receiving platform lifting / lowering devices. Among them, a configuration that can be stored in, for example, the lower rear side of a vehicle is called a retractable load receiving platform lifting / lowering device.

  In general, the retractable load receiving device elevating device includes a guide rail fixed to the lower part of the vehicle, a support base that slides in the vehicle front-rear direction along the guide rail, and an elevating drive that pivots the arm in the vertical direction with respect to the support base. And a foldable load receiving base attached to the tip of the arm of the elevating drive unit. During loading and unloading operations, the unfolded loading platform is lifted and lowered between the loading platform of the vehicle and the ground by the lifting drive unit, and when traveling, the folded loading platform is slid forward together with the support base to lower the vehicle. (See, for example, Patent Document 1).

JP 2000-142208 A

  Since the load receiving platform of the retractable load receiving platform lifting device at the time of storage is located below the vehicle loading platform, the loading platform may be used as a step for stepping up and down the vehicle loading platform. However, when in the retracted state, the load receiving table faces the back surface of the main body of the load receiving table folded at the base end of the load receiving table, not the load receiving surface. Since the back surface of the cargo cradle is not originally formed for steps, coil springs (torsion springs) and structural materials that reduce the force required to fold the cargo cradle are often exposed. It may become an obstacle when using as.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a retractable cradle that can ensure high convenience as a step when ascending and descending a cradle of a vehicle when in a retracted posture. The object is to provide a lifting device.

(1) In order to solve the above-described object, the present invention provides a retractable load receiving base lifting device that can be stored on the lower side of a vehicle, and a load receiving base base end connected to the load receiving base end through a hinge. A load receiving surface that forms a load receiving surface together with the load receiving base end when deployed, and a load receiving base that is folded on the load receiving base when stored, and the load receiving base end on the back of the load receiving main Provided with a step surface facing the upper side during storage and formed flat over the entire length in the width direction of the load receiving body main body, and the width direction of the load receiving body main body on the step surface of the cover And slip prevention means provided over the entire length.

(2) In order to achieve the above object, the present invention also relates to a retractable load receiving device lifting device that can be stored on the lower side of a vehicle, a load receiving base end portion, and a load receiving surface together with the load receiving base end portion when deployed. And a load receiving base body that is folded on the base of the load receiving base at the time of storage, and connects the main body of the load receiving base to the base end of the load receiving base, and is connected to the base end of the load receiving base. A hinge having a first rotation fulcrum and a second rotation fulcrum connected to the load cradle body, a hinge pin fixed to the second rotation fulcrum of the hinge, and the load cradle body facing upward when stored A torsion bar disposed on the back surface of the portion and fixed at both ends to the hinge pin and the back surface of the load receiving body main body, and the torsion bar covering the torsion bar, the load receiving table on the back surface of the load receiving body main body Provided at the end facing the base end A cover in which a step surface facing upward at the time of storage is formed flat across the entire length in the width direction of the load receiving body main body, and a slip prevention provided on the step surface of the cover over the entire length in the width direction of the load receiving body main body. Means.

  (3) In the above (1) or (2), preferably, the end surface of the cover that faces the load receiving base end portion when deployed is the rear end surface of the load receiving base base end together with the rear end surface of the load receiving base base portion when stored. And a bumper is formed on the rear side of the vehicle.

  (4) In any one of the above (1) to (3), preferably, the slip prevention means includes a plurality of protrusions formed on a step surface of the cover.

  (5) In the above (4), more preferably, the protrusion is formed in a straight line shape in the width direction of the cargo receiving table main body by extrusion molding.

  According to the present invention, at the time of storage, since the cover with the step surface formed flat across the entire length in the width direction of the load receiving table is located at the upper part of the load receiving table, High convenience can be ensured as a step. In addition, since the slip prevention means is provided on the step surface, the safety of the operator when ascending and descending to the loading platform is improved.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a retractable cargo receiver lifting device according to the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view showing an overall configuration of an example of a vehicle equipped with a retractable cargo receiving platform lifting apparatus according to an embodiment of the present invention.
A vehicle 1 shown in FIG. 1 is a freight vehicle provided with a loading platform (bamboo body) 3 at the rear of a driver's seat 2. The retractable load receiving device elevating device 100 according to the present embodiment is attached to a lower portion of the rear end of the vehicle frame 4 of the vehicle 1 on which the load carrier 3 is mounted, and can be folded (stored) in the lower portion of the vehicle frame 4 during traveling. It is a thing. When loading and unloading the cargo onto the loading platform 3, the loading platform 8 (described later) that is slid and protruded to the rear side of the vehicle frame 4 can be moved up and down between the height of the floor surface 3a of the loading platform 3 and the height of the ground. It supports the loading and unloading of luggage and workers on the loading platform 3 according to the work.
In other drawings that will be referred to sequentially below, the direction corresponding to the driver's seat 2 side (left upper side in the figure) of the vehicle 1 shown in FIG. 1 is the front side and the loading platform 3 side (lower right side in the figure). The corresponding direction is the rear side.

FIG. 2 is a perspective view of the retractable cradle lifting apparatus 100, and FIG. 3 is a side view thereof. However, in FIG. 3, an operation unit 11 to be described later is not shown.
As shown in FIGS. 2 and 3, the retractable load receiving device elevating device 100 includes a base unit 5 fixed to the lower portion of the vehicle frame 4 of the vehicle 1, a load receiving platform (platform) 8, and the load receiving table 8. A lifting drive unit 9 that lifts and lowers the base unit 5, an operation unit 11 that operates the retractable cargo receiver lifting device 100, and a power device (power unit) 12 that is a drive source of the retractable cargo receiver lifting device 100. I have. Detailed configurations of these devices will be sequentially described below.

  First, the structure of the base unit 5 will be described. The base unit 5 includes a mounting part 6 for mounting the retractable load receiving device lifting apparatus 100 to the vehicle frame 4, a support base 7 supported by being suspended by the mounting part 6, and a support base. 7 is provided with a slide drive unit 10 that slides 7 in the front-rear direction.

  The mounting portion 6 includes two brackets 15 and 16 which are fixed to the rear lower portion of the vehicle frame 4 with bolts and the like, a guide rail 17 which is fixed to the lower portions of the brackets 15 and 16 with bolts and the like, and a front bracket 15 and a support plate 18 fixed to the lower part of 15. The brackets 15 and 16 and the guide rail 17 are provided at two places in the width direction (left and right) of the vehicle 1. The guide rail 17 is made of, for example, H-shaped steel, and is arranged substantially horizontally along the front-rear direction of the vehicle 1.

  The support base 7 includes a slider 20 engaged and supported by the guide rail 17, a beam 21 spanned between the left and right sliders 20, and an inner base frame fixed to the beam 21 so as to be positioned outside the slider 20. 22, an outer base end frame 23 fixed to the beam 21 so as to be positioned outside the left and right inner base end frames 22, and a support roller 24 for guiding the operation of the load receiving platform 8 during storage or deployment. Yes. The support roller 24 is rotatably provided at the rear end portion of the support member 28 that is disposed along the front-rear direction and is fixed to the beam 21.

  The slide drive unit 10 includes a slide cylinder 55. The bottom portion (not shown) of the slide cylinder 55 is housed and fixed in the support member 28, and the rod tip is fixed to the support plate 18 via a pin 56 as shown in FIG. 3. As a result, the support base 7 slides in the front-rear direction of the vehicle 1 along the guide rail 17 as the slide cylinder 55 expands and contracts, and the support base 7 and the load receiving base 8 with respect to the mounting portion 6 fixed to the vehicle 1 side. -The raising / lowering drive part 9 unites and moves to the front-back direction.

  The configuration of the load receiving platform 8 will be described. The load receiving platform 8 is connected to the load receiving platform base end 30 supported by the elevating drive unit 9 and is pivotably connected to the load receiving platform base end 30 via a hinge 31. The load receiving body main body 32 and a load receiving head front end 34 that is rotatably connected to the load receiving body main body 32 via a hinge 33 are provided. As will be described later, the hinge 31 is pin-coupled at both ends in the vicinity of the load receiving surface of the load receiving base end 30 and the load receiving base main body 32, and the hinge 31 is connected to the load receiving base 30. The rotating mechanism has a double joint structure through the hinge 31. Similarly, both ends of the hinge 33 are pin-coupled in the vicinity of the load receiving surfaces of the load receiving body main body 32 and the load receiving body front end 34, and the rotation mechanism of the load receiving base front end 34 with respect to the load receiving body main body 32. Has a double joint structure with a hinge 33 interposed therebetween.

  With such a configuration, the load receiving body main body 32 and the load receiving stand tip 34 are both turned upward and folded from the unfolded state shown in FIGS. 2 and 3 (details will be described later). At this time, the load receiving base end portion 30 and the load receiving stand main body portion 32, and the load receiving stand main body portion 32 and the load receiving stand front end portion 34 are mutually stopper portions at positions below the hinges 31 and 33, respectively, in the unfolded state. 35 (see FIG. 3) is brought into contact with each other to maintain the posture, whereby the upper surfaces of the load receiving base end 30, the main body 32, and the tip 34 are continuous with each other to form a smooth load receiving surface during deployment.

  The configuration of the lift drive unit 9 will be described. The lift drive unit 9 includes a first arm 41 rotatably connected to the inner base end frame 22 via a pin 40, as shown in FIG. A second arm (lift arm) 44 having both ends connected to one arm 41 and the load receiving base 30 via pins 42 and 43, and both ends to the outer base frame 23 and the load receiving base 30 are pins 45. , 46, and a lift cylinder 50 having both ends connected to the lower end of the first arm 41 and the vicinity of the tip of the second arm 44 via pins 48, 49, respectively. And. As shown in FIG. 2, the elevating drive unit 9 having such a configuration is provided in a pair of left and right.

  Here, in FIG. 3, since the load receiving base end 30 is grounded and the lift cylinder 50 is further retracted, the first arm 41 is pulled toward the load receiving base 30 by the lift cylinder 50, and the first arm The angle formed by 41 with respect to the second arm 44 is small, and the load receiving base end portion 30 is inclined downward in the downward direction. However, in the state where the lift cylinder 50 is extended from the state of FIG. 3 and the stopper bolt 51 of the first arm 41 is in contact with the stopper portion 27 of the inner proximal frame 22, the two ends of the second and third arms 44 and 47 are The positional relationship between the pins 42, 43, 45, and 46 constitutes the positional relationship between the apexes of the parallelogram. That is, the second and third arms 44 and 47 constitute a parallel link, and as long as the stopper bolt 51 of the first arm 41 is in contact with the stopper portion 27 of the inner base frame 22, the lifting drive unit 9 is rotated. Regardless of the angle, the upper surface (load receiving surface) of the load receiving base 30 is always kept almost horizontal.

  As shown in FIG. 3, a stopper portion 52 that abuts against a stopper bolt 26 provided at the upper end portion of the inner proximal end frame 22 is provided in the vicinity of the proximal end portion of the second arm 44. The upper limit angle of the rotation range is defined. Similarly, the lower end of the first arm 41 is provided with a stopper bolt 51 that contacts the stopper 27 provided at the lower end of the inner proximal frame 22, and the lower limit angle of the rotation range of the first arm 41 is defined. Has been.

  The operation unit 11 described above is attached to the end portion of the beam 21 so as to be located on the side of the lower end of the rear end of the vehicle frame 4 in the vehicle 1. The operator operates the operation buttons provided in the operation unit 11 to expand and contract the lift cylinder 50 and the slide cylinder 55. The support member 28 is provided with a storage position sensor 80 (see FIG. 2) for detecting whether or not the folded load receiving table 8 is in contact with the roller 24, and when the load receiving table 8 is stored after use. When the storage position sensor 80 detects that the load receiving table 8 is in contact with the roller 24, the lift cylinder 50 and the slide cylinder 55 are controlled to be interlocked by a control device (not shown).

  The power unit 12 described above is attached to the beam 21 on the side opposite to the operation unit 11. Although not particularly illustrated, the power unit 12 includes at least a hydraulic pump and a plurality of control valves that switch and supply pressure oil discharged from the hydraulic pump to the lift cylinder 50 and the slide cylinder 55, respectively. The hydraulic pump may be an electric pump that is driven by power supplied from a generator or a battery of the vehicle 1, or may be configured to be driven by using an engine (not shown) of the vehicle 1 as a drive source in some cases. .

4 is a perspective view of the connecting structure of the load receiving base end portion 30 and the load receiving base main body 32 seen from the side, FIG. 5 is a perspective view seen from the upper side, and FIG. 6 is a perspective view seen from the rear side. . In these figures, the state at the time of storage is shown, and the same parts as those in the previous figures are denoted by the same reference numerals and description thereof is omitted.
As shown in FIGS. 4 to 6, the hinge 33 described above connects the load receiving base body 32 to the load receiving base end 30, and constitutes a double joint having two fulcrums. Yes, one side is connected to the load receiving base 30 through a hinge pin 60 that is a first rotation fulcrum, and the other side is connected to the load receiving body main body 32 through a hinge pin 61 that is a second rotation fulcrum. . The hinge pins 60 and 61 are arranged at two locations in the width direction of the cargo receiver. The hinge pin 60 is locked to the load receiving base end 30 by a locking member 62, and the hinge 33 rotates relative to the hinge pin 60. On the other hand, the hinge pin 61 is locked and fixed to the hinge 33 by a bolt 63, and the load receiving table main body 32 rotates relative to the hinge pin 61.

  With the above configuration, when the load receiving body main body 32 is folded from the unfolded state, the load receiving body main body 32 pivots upward with the pin 61 as a fulcrum until the load receiving main body 32 is raised substantially vertically. At the stage of tilting toward the end 30 side, the load receiving table main body 32 and the hinge 33 are integrally rotated via the pin 60 and rotated upward. As shown in FIGS. 2 and 3, the load receiving base main body 32 forms a load receiving surface together with the load receiving base end 30 when deployed. In this way, when the load receiving base 8 is in the retracted state, the load receiving base 8 Folded over the end 30.

  When the retracted posture folded on the load receiving base end portion 30 is taken, the back surface 64 of the load receiving base main body 32 faces upward. To the back surface 64 of the load receiving body main body 32, operation force assisting torsion bars 65 and 66 are attached in order to reduce the force required to fold the load receiving body main body 32.

  Both ends of the torsion bars 65 and 66 are fixed to the hinge pin 33 and the back surface 64 of the cargo receiving table main body 32, respectively. Specifically, a pair of brackets 67 and 68 are fixed to the back surface of one (right side in FIG. 5) of the hinge pin 33 and the load receiving base main body 32, and both ends of the torsion bars 65 and 66 are respectively connected to the bracket 67 and 68, respectively. It is fixed to the slit of 68, and is fixed to the hinge pin 33 and the back surface 64 of the load receiving table main body 32 via brackets 67 and 68. That is, in the present embodiment, two torsion bars each having one end fixed to the same hinge pin are provided. At this time, one ends of the torsion bars 65 and 66 are connected to the rotation center of the hinge pin 33, and are arranged so as to extend as much as possible on the extension line of the axis of the hinge pin 33 when viewed as a whole. The brackets 67 and 68 are provided so that the slits extend vertically, but may be arranged so that the slits extend in the lateral (front-rear) direction.

  Reference numeral 69 denotes a detachment prevention between the bracket 67 and the torsion bars 65 and 66. In the present embodiment, as shown in FIG. 4, a cover 70 that covers the torsion bars 65 and 66 is provided.

7 is a plan view of the cover 70 as viewed from the upper side in FIG. 4, and FIG. 8 is a front view of the main cargo cradle lifting / lowering device as viewed from the rear of the vehicle when stored. In these drawings, the same parts as those in the previous drawings are given the same reference numerals, and the description thereof is omitted.
7 and 8, the cover 70 is an end of the back surface 64 of the load receiving body main body 32 opposite to the load receiving base base end 30 when unfolded, that is, the rear side 64 of the back surface 64 of the load receiving body main body 32 during storage. It is provided at the side end. At this time, the cover 70 secures high convenience as a step when an operator gets on and off the vehicle loading platform without unfolding the loading platform, so that the torsion bars 65 and 66 are interposed between the two hinge pins 33. However, the step surface 71 facing upward at the time of storage is formed so as to extend flat over the entire length in the width direction of the load receiving body main body 32.

  In consideration of convenience and safety as a step, the step surface 71 of the cover 70 is provided with a plurality of rows of protrusions 72 as anti-slip means over the entire length in the width direction of the load receiving body main body 32. . These protrusions 72 are linearly formed in the width direction of the cargo receiving table main body 32 by, for example, extrusion molding. By forming the projections 72 by extrusion molding, the slip prevention means can be easily integrally formed with the cover 70. However, the anti-slip means is not limited to a linear protrusion, but may be a button-shaped protrusion, recess, or other form of unevenness, such as a slit, or a commercially available anti-slip seal, A mat or the like may be attached. Note that the end surface of the cover 70 that faces the cradle base end 30 when unfolded (that is, the rear end surface of the cover 70 during storage) is the base of the cradle base as shown in FIGS. It is exposed to the rear of the vehicle together with the rear end surface of the portion 30. Each end surface of the load receiving base end 30 exposed behind the vehicle and the load receiving main body 32 including the cover 70 constitutes a bumper surface 73 that functions as a bumper at the rear of the vehicle.

Next, the operation of the retractable load receiving device lifting apparatus 100 having the above configuration will be described with reference to FIGS.
In order to shift the retractable load receiving platform lifting apparatus 100 from the retracted state shown in FIG. 9 to the working state, first, a predetermined operation is performed by the operation unit 11 to extend the slide cylinder 55 and support as shown in FIG. The base portion 7 is slid rearward, and the elevating drive portion 9 and the load receiving platform 8 are protruded rearward of the vehicle 1. Next, the lift cylinder 50 is contracted, and as shown in FIG. 11, the elevating drive unit 9 is rotated downward to a position where the load receiving base end 30 contacts the ground. When shifting from the state shown in FIG. 10 to FIG. 11, the load receiving platform 8 rolls on the support roller 24 in the folded state, and gradually descends backward from the substantially horizontal state following the support roller 24. The direction is set at an angle, and the robot stands up to a state where it can be easily deployed by hand as shown in FIG.

  When the state shown in FIG. 11 is reached, the cargo receiving platform 8 is deployed. To do so, first, a grip (not shown) provided on the back surface of the cargo cradle body 32 is pulled to unfold the cargo cradle body 32 in a substantially horizontal state (see FIG. 12). Subsequently, a grip (not shown) provided on the back surface (upper surface in FIG. 12) of the load receiving tip 34 is pulled to expand the load receiving tip 34 in a substantially horizontal state (see FIG. 13).

  Next, as shown in FIG. 14, the entire load receiving table 8 is inclined so as to be inclined downward, and the tip of the load receiving table tip 34 is brought close to the ground. This operation is performed when the lift cylinder 50 is further retracted from the state shown in FIG. 13, the first arm 41 is pulled by the lift cylinder 50 and rotated, and the parallel link of the lift drive unit 9 is deformed. By setting it in this state, it becomes easy to load a load on the load receiving stand 8 by a carriage or the like, for example. When the cart is loaded on the load receiving platform 8, a caster stopper (not shown) provided at the load receiving platform tip 34 is raised to prevent the cart from sliding off the load receiving platform 8.

  When a load is loaded on the load receiving platform 8, a predetermined operation is performed by the operation unit 11 to rotate the elevating drive unit 9 to the upper limit, and the load receiving table 8 is raised to the floor height of the loading platform 3 of the vehicle 1 through the state shown in FIG. 13. To 3a (see FIG. 15). In this state, the worker waiting in the loading platform 3 or the worker who has boarded the loading platform 8 together with the luggage carries the luggage on the loading platform 8 into the loading platform 3.

  By repeatedly performing the procedures of FIGS. 13 to 15, the work load of unloading or unloading on the loading platform 3 by the operator is reduced. Further, in order to shift the retractable load receiving device lifting apparatus 100 from the working state to the retracted state, a procedure reverse to the procedure of FIGS. 9 to 15 is performed.

  According to the present embodiment, the cover 70 is positioned above the cargo receiving table 8 during storage, but the cover 70 is configured such that its step surface 71 faces upward during storage. The step surface 71 is formed flat across the entire length in the width direction of the load receiving table main body 32, and is very convenient as a step to step on the ascending and descending of the loading table 3. In addition, since the step surface 71 is provided with the protrusion 72 as a slip prevention means, the safety of the operator when ascending and descending the loading platform 3 is also improved.

  Furthermore, although the torsion bars 65, 66, etc. remain exposed when the cargo receiving platform 8 is stored, the appearance may be complicated and detrimental to the appearance. However, the provision of the cover 70 is also a great advantage. is there. In addition, when the cargo cradle is stored, the exposed end surface of the cover 70 constitutes a flat bumper surface 73 together with the end surface of the cargo cradle base end portion 30 and can also serve as a bumper.

  In the above description, the torsion bars 65 and 66 are provided as means for assisting the load receiving table operation force accommodated in the cover 70. However, as long as the torsion bars 65 and 66 can be accommodated in the cover 70, they may be replaced with, for example, a coil spring. In this case, the same effect as described above can be obtained.

  Although the slide cylinder 55 has been described as an example of the means for sliding the support base 7, the present invention is not limited to the cylinder, and other actuators such as a motor may be used, or the load receiving table 8 may be manually slid. It doesn't matter. Further, the actuator is not limited to a hydraulic actuator, and may be replaced with an electric actuator. The lift cylinder 50 is not limited to the cylinder, and other actuators such as a motor may be used. The lift cylinder 50 may be replaced with an electric actuator without being limited to a hydraulic actuator. Moreover, although the case where the present invention is applied to the retractable load receiving device lifting device that can be stored on the lower rear side of the vehicle has been described as an example, the retractable load receiving device that can be stored on the lower side of the side (right side or left side) of the vehicle. The present invention is also applicable to a table lifting device. Even in such a case, the same effect as described above can be obtained.

It is a perspective view showing the whole structure of an example of the vehicle carrying the retractable load receiving device lifting apparatus of the present invention. It is a perspective view of the retractable load receiving table lifting device of the present invention. It is a side view of the retractable load receiving table lifting device of the present invention. It is the perspective view which looked at the connection structure of the load receiving base base end part of the retractable load receiving base lifting / lowering device and the load receiving base main body according to the embodiment of the present invention from the side surface side. It is the perspective view which looked at the connection structure of the load receiving base base part of the retractable load receiving lifting device which concerns on one embodiment of this invention, and the load receiving base main-body part from the upper side. It is the perspective view which looked at the connection structure of the load receiving stand base end part of the retractable load receiving stand raising / lowering device which concerns on one embodiment of this invention, and the load receiving stand main-body part from the back side. It is a top view of the cover with which the retractable load receiving table lifting / lowering device according to an embodiment of the present invention is provided. It is the front view which looked at the retractable load receiving device raising / lowering device which concerns on one embodiment of this invention from the vehicle rear at the time of storage. It is operation | movement explanatory drawing of the goods receiving base raising / lowering apparatus of this invention. It is operation | movement explanatory drawing of the goods receiving base raising / lowering apparatus of this invention. It is operation | movement explanatory drawing of the goods receiving base raising / lowering apparatus of this invention. It is operation | movement explanatory drawing of the goods receiving base raising / lowering apparatus of this invention. It is operation | movement explanatory drawing of the goods receiving base raising / lowering apparatus of this invention. It is operation | movement explanatory drawing of the goods receiving base raising / lowering apparatus of this invention. It is operation | movement explanatory drawing of the goods receiving base raising / lowering apparatus of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 30 Cargo stand base end part 32 Cargo stand body part 33 Hinge 61 Hinge pin 64 Back surface 65 Torsion bar 66 Torsion bar 70 Cover 71 Step surface 72 Protrusion 73 Bumper surface 100 Retractable load carrier lifting device

Claims (5)

In the retractable load receiving device lifting device that can be stored on the lower side of the vehicle,
A receiving end base end;
A load receiving base body connected to the base of the load receiving base via a hinge, forming a load receiving surface together with the base of the load receiving base when deployed, and folded on the base end of the load receiving base when stored,
A cover that is provided at an opposite end of the back surface of the load receiving base body portion to the base end portion of the load receiving base, and that is flatly formed over the entire length in the width direction of the load receiving base body portion;
A retractable load receiving device elevating device comprising slip prevention means provided on the step surface of the cover over the entire length in the width direction of the load receiving body main body. In the retractable load receiving device lifting device that can be stored on the lower side of the vehicle,
A receiving end base end;
A load receiving surface is configured together with the load receiving base end at the time of deployment, and a load receiving main body that is folded on the load receiving base at the time of storage,
The load cradle body is connected to the load cradle base end, and a first rotation fulcrum connected to the load cradle base end and a second rotation fulcrum connected to the load cradle base A hinge having
A hinge pin fixed to the second pivot point of the hinge;
A torsion bar disposed on the back surface of the load receiving body body portion facing upward during storage, and having both ends fixed to the back surface of the hinge pin and the load receiving body body portion;
Covering this torsion bar, provided at the opposite end of the back surface of the load receiving body main body to the load receiving base, and the step surface facing upward when stored is the total length in the width direction of the load receiving main body A cover formed flat across
A retractable load receiving device elevating device comprising slip prevention means provided on the step surface of the cover over the entire length in the width direction of the load receiving body main body.   3. The retractable load receiving device lifting apparatus according to claim 1 or 2, wherein an end surface of the cover that faces the load receiving base end portion is rearward of the vehicle together with a rear end surface of the load receiving base end portion during storage. A retractable cargo receiving platform elevating device that is exposed to the vehicle and forms a bumper behind the vehicle.   The retractable load receiving device lifting apparatus according to any one of claims 1 to 3, wherein the slip prevention means includes a plurality of protrusions formed on a step surface of the cover. .   5. The retractable load receiving device lifting apparatus according to claim 4, wherein the protrusion is formed linearly in the width direction of the load receiving body main body by extrusion molding. 6.

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