JP2602279Y2 - Vehicle loading / unloading device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting / lowering device suitable for a van type vehicle having a double door at the rear of the vehicle body. The present invention relates to a loading tray lifting device that can be stored in a storage device.

[0002]

2. Description of the Related Art In general, when a loading / unloading device is applied to a vehicle having a double door, if the loading / unloading device is stored vertically along the rear surface of the door when not in use, it will hinder opening and closing of the door. At times, there has been proposed a loading tray lifting device capable of storing the loading tray under the floor at the rear of the vehicle body. As such a loading table lifting device, for example, Japanese Patent Publication No. Hei 2-6655
There is an official gazette. The lifting platform described in the above publication is
When the loading tray is turned over by more than 90 degrees toward the storage position (body side) with the loading tray folded from the unloading position to two sheets, the torsion bar causes the loading tray to rotate by its own weight. When the load receiving platform is raised in this state, the free receiving side slides on its free end against the lower surface of a guide member provided on the vehicle body side, and the torsion bar is provided. It is turned to the storage posture while resisting the above, and is stored under the floor at the rear of the vehicle body.

[0003]

However, in the case of the above-mentioned loading tray elevating device, it is difficult to apply the two-folded loading rack to a vehicle having a small rear overhang due to the space under the floor at the rear of the vehicle body. In addition, when the loading tray is stored, the torsion bar having a large resilient force is used because the loading tray is held at the storage position by the cooperative action of the upward elastic force of the torsion bar and the pressing by the guide member. It is necessary and dislikes the lack of smoothness of the storing operation, and there is a possibility that the receiving table may swing up and down due to the vibration of the vehicle body during traveling, and there is a problem in its holding ability.

In view of the above problems, the present invention enables a vehicle having a small rear overhang to be stored in a limited space below the rear portion of the vehicle body without extending the rear overhang. A technical problem to be solved is to provide a loading / unloading device that can easily move the loading / unloading table into and out of the space, and can stably hold the loading table at the storage position. .

[0005]

Means for Solving the Problems In order to solve the above problems, the present invention is configured as follows. That is, the device for raising and lowering the loading tray of the vehicle according to the present invention includes a base of the foldable loading tray at a lower end portion of a lifting column arranged so as to be able to ascend and descend along the right and left columns of the rear end of the vehicle body. The loading and unloading posture which horizontally projects to the rear side of the vehicle body in the extended state, and the storage posture in which the vehicle body is inverted forward and downward under the vehicle body in the folded state, are rotatably mounted. A receiving member capable of holding in both the unloading position and the storage position by restricting the rotation of the load receiving table by its own weight by contacting with the table is installed. A guide roller provided on the load receiving platform is provided to receive the rotation by its own weight of the load receiving platform which is turned over by 90 degrees to the attitude side and guided to a substantially horizontal storage attitude. Rollable guide rails are provided , and on the vehicle body side
Is brought into contact with the upper surface of the
A stopper is provided for fixing the load receiving platform in cooperation with the receiving member .

[0006]

In the loading / unloading device according to the present invention configured as described above, in order to store the loading / unloading position of the loading / unloading posture protruding rearward of the vehicle body in the extended state, the loading / unloading stage is folded down. Then, when it rotates more than 90 degrees to the storage posture side, the guide roller of the loading tray is mounted on the end of the guide rail, and the forward rotation of the loading tray due to its own weight is received. When the loading tray is raised in this state, the guide rollers roll forward on the guide rails, and the loading tray gradually assumes a horizontal posture. The receiving platform will eventually be received by the receiving member disposed between the lower end of the lifting column Rutotomoni, the upper surface of the body-side strike
It comes into contact with the hopper. In other words, the receiving platform is
It is pinched from the top and bottom by the joint with the
It is fixed in a horizontal stable storage position without any.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. This embodiment is applied to a vehicle having a double door at the rear end of the vehicle body, and as shown in FIGS. A cylindrical support 2 having a substantially rectangular cross section and having a vertically long slit is provided upright. A lifting column 3 having a substantially T-shaped cross section is inserted into the support 2 via a lift roller 4 so as to be vertically movable. At the same time, it is suspended by the wire 5. Then, the lifting column 3 is raised and lowered by the operation of a hydraulic cylinder (not shown) connected to the wire 5.

The loading tray 9 supported by the lifting column 3 and raised and lowered can be folded in three from a first loading tray 9A, a second loading tray 9B, and a third loading tray 9C.
Each of A, 9B, and 9C has a configuration in which a striped steel plate is superimposed and fixed on the upper surface of a hollow frame having a substantially rectangular vertical section and a rectangular frame. The loading table 9 having such a configuration is provided at the lower end of the elevating column 3 with a loading / unloading posture horizontally protruding to the rear of the vehicle body in the extended state shown in FIG. 1 and in the folded state shown in FIG. Is mounted so as to be rotatable so that it can be converted into a horizontal storage posture in which the front storage space is inverted and stored.

That is, column brackets 6 projecting rearward from the vehicle body are fixed to the lower ends of the left and right lifting columns 3, respectively. A hollow frame 7 having a substantially rectangular surface is laterally suspended, and hinge brackets 10 provided at the left and right front ends of the first loading tray 9A are rotatably mounted on brackets 8 of the hollow frame 7 via hinge pins 11. Have been. And the first receiving tray 9A
Is rotated downward by the frame front end face in the unloading position abuts against the rear end face of the hollow frame 7 is restricted, the stored posture inverted forward against the upper surface of the second receiving platform is hollow frame 7 The downward rotation is restricted by the contact. That is, the hollow frame 7 constitutes a receiving member for receiving the rotation of the load receiving table 9 due to its own weight and holding the load receiving table 9 in both the unloading position and the storage position. Note that the left and right hinge pins 11 are fixed to the hinge bracket 10 of the first load receiving table 9A.

As shown in FIGS. 2 and 5, a first torsion bar 12 is provided in the hollow frame 7 for reducing the operation force at the time of reversing rotation of the load receiving table 9 which is operated in the folded state. Is pierced. One end of the first torsion bar 12 is connected to the shaft 14 of the gear 13 rotatably mounted on the one column bracket 6 by fitting a square shaft and a square hole so as to rotate together. ing.
The gear 13 is fixed to the tip of a hinge pin 11 extending through the column bracket 6 on the same side.
5 is engaged. That is, one end of the first torsion bar 12 is connected so as to rotate together with the hinge pin 11 via the interlocking means including the gears 13 and 15. In addition,
The gears 13 and 15 are covered by a cover (not shown).

On the other hand, the other end of the first torsion bar 12
The base is connected to the other column bracket 6 so as to rotate around the center of the base of a lever 16 rotatably mounted by fitting a square hole and a square shaft. And
As shown in FIGS. 5 and 6, the lever 16 is
Is rotated from the storage position to the loading / unloading position, when it is tilted slightly rearward from the upright position, it comes into contact with the torque transmitting stopper 17 fixed to the outer surface of the column bracket 6 to restrict the rotation. It has become. Therefore, the first torsion bar 12 is twisted by the subsequent rotation of the load receiving table 9 due to its own weight, and an upward urging force acts on the load receiving table 9. That is, the first torsion bar 12 urges the loading tray 9 in the unloading position only in a range of approximately 90 degrees in the rising direction, and does not act on the remaining rotation range. Note that the lever 16 is regulated by the steady rest stopper 18 at the final stage of the storage operation of the loading tray 9.

Next, as shown in FIGS. 2 and 5, the second receiving table 9B is provided with hinge brackets 19 at the left and right front ends, and via hinge pins 20 fixed to the hinge brackets 19. The first loading tray 9A is rotatably mounted on brackets 21 projecting from the left and right rear ends thereof, and its front end face abuts against the rear end face of the first loading tray 9A to maintain the unloading position. Is done. Also,
A second torsion bar 22 for reducing a rotating operation force at the time of extension and folding is penetrated in the hollow rear frame of the first loading tray 9A. 2nd torsion bar 2
2 has one end of one bracket 2 of the first receiving tray 9A.
1 is connected to the shaft 24 of the gear 23 rotatably attached to 1 so as to co-rotate by fitting a square hole and a square shaft,
The other end is non-rotatably connected to the other bracket 21 of the first receiving tray 9A. The gear 23 is meshed with a gear 25 provided on the hinge pin 20, so that the second torsion bar 22 is interlocked with the hinge pin 20 through interlocking means by the gear when the second receiving table 9B rotates. The gear 23,
25 is covered by a cover not shown.

Thus, the second torsion bar 22 is
The neutral position is set when the loading tray 9B is in the upright posture, and the second loading tray 9B is set so that the second loading tray 9B is twisted by its own weight in the forward or rearward direction. Therefore, the second loading tray 9B is always biased toward the upright side, and the operating force at the time of folding and extension is reduced.

Next, the third receiving table 9C is shown in FIGS.
Hinge brackets 26 provided at the left and right front ends as shown in FIG.
Is a bracket 2 protruding from the left and right rear ends of the second receiving tray 9B.
7 is rotatably supported via a hinge pin 28, and the front end face abuts against the rear end face of the second receiving tray 9B in an abutting manner, thereby maintaining the unloading position. In the present embodiment, the third receiving tray 9C does not employ a structure for reducing the operating force by the torsion bar. However, the third receiving tray 9C has the above-described two-fold or three-fold second receiving tray 9B and the first receiving tray 9C. This is because the weight is lighter than the table 9A. However, it can be adopted if necessary. A concave portion extending in the width direction is set near the rear end of the third load receiving table 9C, and a caster stopper 29 is attached to the concave portion. The caster stopper 29 has a pin 30 on the rear end side.
, And is always urged by a spring 31 provided around the pin 30 so that the front end side thereof floats on the third receiving tray 9C.

Further, a guide plate 32 is rotatably attached to the rear end of the third receiving tray 9C via a hinge 33. The conductive plate 32 is set to a loading / unloading posture in which it is inclined rearward and downward, and is held by a support member 34 fixed to the lower rear end of the third receiving tray 9C. Then, at the time of storage, the caster stopper 29 is folded on the third receiving tray 9C, and the caster stopper 29 is pressed down by this folding to fall into the recess.

Each of the receiving tables 9A and 9 including the conductive plate 32
A lock device for holding them in a folded state is installed on one of the left and right sides (the left side in this embodiment) of B and 9C. Hereinafter, the lock device for folding and holding will be described. As shown in FIG.
A hook lever 36 with a handle 36a that can be engaged with and disengaged from a lock pin 35 protruding from the rear outer surface of the second loading tray 9B is attached to the front outer surface of the second loading tray 9B. The handle 3 which can be disengaged from a lock pin 37 protruding from the front outer surface of the second loading tray 9B is provided on the rear outer surface of the second loading tray 9B.
The hook lever 38 with 8a is attached.

The hook levers 36 and 38 are both rotatably mounted on the brackets 41 and 42 by pins 39 and 40, and are always urged to a lock position set by a lock spring (not shown). . At the time of folding, the lock pins 35 and 37 are set so as to automatically engage with the hooked levers 36 and 38 while abutting against the inclined surfaces of the hooks 36 and 38 and then pushing them away. The lock is released by operating the handle. ing.

In the center of the side surface of the third receiving table 9C,
The lock plate 44 with the handle 44a is a hinge 43
The lock plate 44 is always urged to a lock position set by a spring (not shown). Correspondingly, a lock pin 45 is provided on the rear surface side of the conductive plate 32 so as to protrude laterally. When the guide plate 32 is folded on the upper surface of the third receiving tray 9C, the lock pin 45 is set so as to automatically engage with the lock hole 44b while abutting against the inclined upper surface of the lock plate 44 and then pushing it away. The lock is released by operating the handle.

On the other hand, below the rear lamp 61 at the rear end of the vehicle body 1, as shown in FIGS. 1, 3 and 4, when the folded receiving table 9 is moved upward and stored in the underfloor space. A guide rail 46 is provided for receiving the receiving tray 9 which is turned forward and backward, and for guiding the receiving tray 9 to the storage position. This guide rail 46
Is fixed to the inner surface of the lower end portion of one of the right and left columns (the right side in this embodiment). More specifically, the guide rail 46 extends substantially horizontally in the front-rear direction, and has a rubber 46a attached to the upper surface. When the receiving table 9 is stored, the left end of the second receiving table 9B is closer to the front end. The guide roller 47 is provided so as to be able to roll freely. The length is set such that the guide roller 47 is detached from the upper surface of the loading tray 9 in the final storage state.

A stopper 48 is provided on the lower surface of the rear end portion of the vehicle body 1 so as to abut against the upper surface of the load receiving table 9 in the retracted position to suppress the backlash. In addition, the receiving table 9 in the retracted state protrudes rearward from the rear end of the vehicle body 1 by a predetermined amount (less than the protruding amount of the column bracket 6).
The upper surface thereof, that is, the upper surface of the first receiving table 9A, constitutes a step S for getting on and off the cargo room 60 with the receiving table 9 stored.

In addition, a lock device for preventing a natural lowering of a power lift for raising and lowering the load receiving table 9 is provided near a lower portion of the right and left columns 2. This locking device includes a stopper plate 49 provided on the left and right columns 2 as shown in FIG. 8, and a substantially L-shaped stopper pin provided on the left and right column brackets 6 and engageable with the stopper plate 49. 53, a lock ring 54 that can be hooked on the stopper pin 53, and a lock handle 55 for operating the lock ring. The stopper plate 49 is attached to the bracket 50 fixed to the outer surface of the rear end portion of the column 2 in a vertically oriented state so that its base can be horizontally rotated via the longitudinal axis 51, and is attached to the upper end surface thereof. Has a recess with which the stopper pin 53 can be engaged. The stopper plate 49 is always urged by a spring 52 to an unlocked position where the stopper plate 49 is rotated to the front side of the vehicle body as indicated by a virtual line.

On the other hand, the stopper pins 53 are projected outward from the upper ends of the left and right column brackets 6, and the lock handle 55 is rotatable up and down on the outer surface of the column bracket 6 at a position below the stopper pins 53. The lock ring 54 is mounted on the lock handle 55. After the receiving table 9 is stored, the stopper plate 49 is rotated toward the column bracket 6 to engage the recess with the stopper pin 53, and the lock ring 54 is engaged with the hook at the distal end of the stopper pin 53. Then, the lock handle 55 is turned downward to lock the lock ring 54 by tightening.

As shown in FIGS. 5 and 7, the hollow frame 7 is provided with an auxiliary step 56 for getting on and off the load room 60 with the load receiving table 9 stored. In other words, the auxiliary step 56 is a two-step step including the step of getting on and off the first receiving tray 9A when the occupant directly loads and unloads small packages. The auxiliary step 56 includes a plurality of mounting projections 57 provided on the lower surface on the base side thereof, which are fixed to the rear end surface of the hollow frame 7 and which are pin 59 against a plurality of substantially U-shaped brackets 58 which project horizontally rearward. The bracket 5 is mounted so as to be able to be pivoted upward via a
8 so that it is held in a horizontal position by being placed on the upper surface. Note that the flip-up posture of the auxiliary step 56 is held by an appropriate lock means (not shown).

In the horizontal position, the auxiliary step 56 is set to have a size to be stored in the lower part of the first receiving tray 9A when the receiving tray 9 is turned to the unloading position.
The first receiving tray 9A functions as a reinforcing member for supporting the first receiving tray 9A from below to prevent bending near the center of the first receiving tray 9A.

The lifting and lowering device of the present embodiment is constructed as described above, and its operation will be described below. When loading / unloading the cargo in the cargo room 60 of the cargo handling vehicle, for example, when loading the cargo, the cargo receiving table 9 in the extended loading / unloading posture as shown by the solid line in FIG. . In this state, a trolley (not shown) loaded with the load is carried from the guide plate 32 onto the load receiving table 9. At this time, the caster stopper 29 falls down once by the passage of the wheel of the bogie, and stands and stops after passing. In this way, after loading the luggage, the hydraulic cylinder is driven to raise the loading table 9 together with the lifting column 3 to a position corresponding to the floor of the luggage compartment 60 as shown by the phantom line in FIG. The truck is carried into the luggage compartment, and the luggage is loaded into the luggage compartment 60. When unloading luggage from the luggage compartment 60,
The procedure is performed in the reverse order of the above.

On the other hand, when the loading tray 9 is stored after the loading / unloading operation is completed, first, the loading plate 9 is lowered on the ground and the guide plate 32 is pivoted about the hinge 33 as the third loading tray. Fold it on the table 9C. At this time, the caster stopper 29 is retracted and stored in the recess of the third receiving tray 9C by the weight of the guide plate 32, and the lock pin 45 of the guide plate 32 is moved to the lock plate of the third receiving tray 9C as shown by an imaginary line in FIG. The guide plate 32 is held in a folded state by engaging with the lock holes 44b of the 44. Subsequently, the third receiving table 9C is connected to the hinge pin 28.
Is folded on the second receiving tray 9B with the turning center. At this time, the hook lever 38 of the third receiving tray 9C is engaged with the lock pin 37 of the second receiving tray 9B as shown by the phantom line in FIG. 9, and the folded state of the third receiving tray 9C is maintained.

Further, the second receiving table 9B is connected to the hinge pin 20.
Is folded on the first receiving tray 9A with the turning center as a rotation center. At this time, the second torsion bar 22 interlocked with the hinge pin 20 via the gears 23 and 25 moves the second
Until B is in the upright posture, it acts to rotate the second receiving tray 9B upward, and when it rotates forward beyond the upright posture, it is twisted in the opposite direction to resist the rotation. Act like so. Therefore, the folding operation force of the large-weight second loading tray 9B including the conductive plate 32 and the third loading tray 9C is reduced. The second loading tray 9B folded on the first loading tray 9A engages with the lock pin 35 of the second loading tray 9B with the hook lever 36 of the first loading tray 9A as shown by a virtual line in FIG. By doing so, the folded state is maintained.

Subsequently, the first load receiving table 9A, that is, the entire load receiving table 9 folded in a three-stage stack (four-stage stack including the conductive plate 32) is turned upward with the hinge pin 11 as the center of rotation. At this time, the first torsion bar 12 interlocked with the hinge pin 11 via the gears 13 and 15 acts to assist the upward rotation of the first receiving tray 9A, and the loading tray 9
To reduce the upward turning force. Then, near the position where the load receiving table 9 rotated upward exceeds 90 degrees, the guide roller 47 of the second load receiving table 9B rides on the rear end of the guide rail 46 on the vehicle body side as shown in FIG. In this position, the receiving table 9 receives rotation due to its weight. In this state, when the hydraulic cylinder is operated and the load receiving table 9 is raised together with the lifting column 3, the guide roller 47 rolls on the guide rail 46 and moves forward with the rise.

In this way, the loading tray 9 is moved while turning forward and backward to be horizontal, and in the final storage position shown in FIG. 4, the guide roller 47 is disengaged from the upper surface of the guide rail 46, and the loading tray 9 is moved right and left. Is mounted on the hollow frame 7 laid horizontally between the column brackets 6, and its upper surface abuts against a stopper 48 under the floor of the vehicle body 1. Therefore,
The receiving table 9 is held in a horizontal stable storage position. When the receiving table 9 rotates beyond 90 degrees, the lever 16 of the first torsion bar 12 freely rotates. Therefore, when the receiving tray 9 is in the storage position, the first torsion bar 12 is not functioning, which reduces the frequency of use and is effective in improving the durability.

Thereafter, the loading tray 9 is fixed to the storage position by a lock device for preventing the power lift from naturally descending. That is, as shown in FIG. 8, the stopper plate 49 attached to the column 2 is rotated toward the column bracket 6, the stopper pin 53 is engaged with the concave portion, and the lock ring is attached to the tip hook portion of the stopper pin 53. After locking the lock 54, the lock handle 55 is rotated downward to lock. When the receiving table 9 is in the retracted position, the upper surface of the rear end forms an elevating step S as shown in FIG. It is possible to get on and off the luggage room 60 using the steps of the steps. Note that the auxiliary step 56 is the same as that shown in FIG.
As shown by the phantom line, when not in use, it is flipped up,
In this state, the rearward projection of the vehicle is avoided, so that the original departure angle of the vehicle is secured.

The conversion from the storage position of the receiving tray 9 to the unloading position is performed in the reverse procedure of the above-described storage operation. That is, after releasing the lock device for preventing the power lift from naturally descending, if the power lift is actuated and the elevating column 3 is lowered, the receiving table 9 is rotated along with the guide rail 46 to near the upright posture. Will be done. Thereafter, the folded loading tray 9 is manually rotated backward until the first loading tray 9A is in the horizontal position, but when the loading tray 9 is rotated to a position near the upright position, it is indicated by a virtual line in FIG. As shown, since the lever 16 of the first torsion bar 12 abuts against the torque transmitting member 17 to restrict the rotation in the same direction, the torsion bar 12 is twisted in the rotation range from this position to the horizontal posture. That is, an upward torque that acts against the rotation of the load receiving table 9 due to its own weight acts on the load receiving table 9, and the operation force is reduced. After that, while manually releasing the lock device for holding the folded posture, the second
When the receiving tray 9B, the third receiving tray 9C, and the guide plate 32 are turned backward and backward in this order, the receiving tray 9 is converted into the extended unloading posture.

The present invention is not limited to the illustrated embodiment. For example, guide rails 46 for guiding the loading tray 9 to the storage position are provided on both the left and right columns 2, and the hollow as a receiving member is provided. The frame 7 is formed of a non-hollow member, and the hinge pins 11 and 20 of the receiving table 9 and the first and second
It is possible to change the gear conduction type as the interlocking means with the torsion bars 12 and 22 to the chain conduction type.

[0033]

As described in detail above, according to the present invention, when the receiving tray is turned upward in a state where the receiving tray is folded in three layers, the guide rollers provided on the receiving tray are positioned below the floor of the vehicle body. It is set so that it can ride on the guide rail provided in, and in that state, the lifting column is raised and the load receiving table is turned forward and guided under the guide rail, and stored under the floor of the vehicle body Because of this, it is possible to smoothly move the loading tray to the storage position, and the horizontal storage posture is supported by the dedicated receiving member installed on the vehicle body side, so that it can be held in a stable state. The cargo receiving table stored under the floor at the rear of the vehicle body does not hinder the opening / closing operation of the double door, improves the opening / closing operation of the door, and has a small rear overhang because it is a three-stage folding type. It is possible to store the vehicle under the floor at the rear end of the vehicle body, and this also makes it possible to secure a departure angle even for a vehicle having a low ground level on the floor surface.

[Brief description of the drawings]

FIG. 1 is an overall side view of a loading tray lifting device in which a loading tray is in an unloading position.

FIG. 2 is a perspective view showing a loading tray in an unloading position.

FIG. 3 is an explanatory diagram showing a mode of movement of the loading tray from the unloading position to the storage position.

FIG. 4 is an explanatory diagram showing a final storage state of the receiving tray.

FIG. 5 is a plan view of a torsion bar and an auxiliary step.

6 is a view as viewed in the direction of the arrow A in FIG. 5;

FIG. 7 is a sectional view taken along the line BB of FIG. 5;

FIG. 8 is a perspective view showing a lock device for preventing a power lift from naturally descending.

FIG. 9 is a perspective view showing a folding and holding lock device of the loading tray.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Body 2 ... Column 3 ... Elevating column 6 ... Column bracket 7 ... Hollow frame (receiving member) 9 ... Receiving stand 9A ... 1st receiving stand 9B ... 2nd receiving stand 9C ... 3rd receiving stand 12 ... 1st torsion bar 22 second torsion bar 29 caster stopper 32 guide plate 46 guide rail 47 guide roller 49 stopper plate 53 stopper pin 54 lock ring 55 lock handle 56 auxiliary step S step

Claims (1)

(57) [Scope of request for utility model registration] A base of a foldable loading table is provided at the lower end of a lifting column arranged to be able to ascend and descend along a column standing upright on the left and right sides of a rear end of the vehicle body. The loading / unloading posture is horizontally reversible between a loading / unloading posture that protrudes horizontally, and a storage posture that is turned forward and downward below the vehicle body in a folded state. Installing a receiving member that restricts rotation due to its own weight and can be held in both the unloading position and the storage position,
In the lower part of the support, from the unloading position to the storage position, 9
A guide rail provided with a guide roller provided on the load receiving platform is provided so as to receive the rotation of the load receiving platform which is inverted and rotated by more than 0 degrees due to its own weight and guide it to a substantially horizontal storage posture. And on the vehicle side,
Contact and secure the loading platform in cooperation with the receiving member.
A lifting and lowering device for a vehicle receiving tray provided with a stopper for fixing .