JP2010155600A - Cargo receiving platform lifting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cargo receiving platform lifting device capable of securing an excellent continuity between a floor surface of a cargo compartment and a cargo receiving platform in lifting-up and storage, by securing a jumping-up margin of a wheel shaft of a rear wheel by restraining a dimension in the longitudinal direction of the whole device in storage within a rear overhang of a small vehicle. <P>SOLUTION: This cargo receiving platform lifting device 100 supports loading-unloading of a cargo to the cargo compartment 3 of a rear part of a vehicle 1, and includes a link mechanism 10 arranged on both right-left sides in the cargo compartment 3, a cargo receiving platform base end part 31 connected to a tip part of the link mechanism 10 and constituting a part of the floor surface of the cargo compartment 3 in lifting, a cargo receiving platform body part 32 connected to a rear end part of the cargo receiving platform base end part 31 in deploying, continuing the cargo receiving platform base end part 31 and a cargo receiving surface and stored in a lower side storage space of the cargo receiving platform base end part 31 in storage, and a lift driving device 20 connected to the link mechanism 10 and lifting the cargo receiving platform base end part 31 together with the cargo receiving platform body part 32. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a load receiving table lifting / lowering device that supports loading / unloading of a load to / from a rear luggage compartment of a vehicle.

  The load receiving platform lifting device lifts and lowers the platform (load receiving platform) between the load floor height of the vehicle and the ground height, and supports loading and unloading work of loads and workers on the load platform of the vehicle. Conventionally, this type of cargo receiving platform lifting device has been mainly mounted on the lower rear side outside the cargo compartment of a small truck or a medium-sized van type vehicle that is advantageous for securing a mounting space.

  However, in recent years, there are an increasing number of cases in which small vehicles such as delivery vans and route vans and small vehicles such as one-box vehicles are used as transport vehicles. Carrying luggage by such small vehicles is, for example, mobility in areas with many narrow roads such as urban areas, residential areas, sightseeing areas, and areas where traffic congestion is significant, stopping for loading and unloading luggage and getting on and off workers. The merit is great in terms of space. In such small vehicles, for example, relatively light loads of about 20 to 30 kg or less are mainstream. However, there is a case where a heavy load is loaded in order to load and unload manually. There is a case.

  However, in such a small vehicle, it is difficult to secure a space for mounting the load receiving platform lifting device in the lower rear portion outside the cargo space, like the small truck and the medium-sized van type vehicle.

  On the other hand, Patent Document 1 and the like propose a load receiving platform lifting device, which is a cargo floor floor type lift that is applicable to all types of vehicles having a cargo compartment from a one box car to a large truck. This load room floor type combined lift is configured such that the center of the floor surface at the rear of the load room is separated from other portions of the load room floor surface, slides backward, and moves up and down between the ground.

JP 2005-254959 A

  However, in the load / floor-type lift of Patent Document 1, the center portion of the floor at the rear of the load chamber is a single load receiving platform, and a lift mechanism is attached to the left and right of the load receiving table along with the load receiving platform. An extendable slide mechanism is provided in front of the load receiving table. Therefore, the size of the entire device including the lift mechanism and the slide mechanism is larger than that of the load receiving platform, and particularly the longitudinal dimension greatly exceeds the distance (rear overhang) from the axle of the rear wheel of the small vehicle to the rear end of the vehicle body. . Therefore, when the above-described cargo compartment floor type lift device is actually mounted on a small vehicle, the floor surface of the cargo compartment must be raised in order to secure the allowance of the rear axle.

  Furthermore, since the above cargo room floor surface type lift device is configured to slide up and down after a part of the cargo floor surface is used as a load receiving platform, in the state where the cargo receiving platform is lifted up, the load receiving platform and others It is difficult to run the cart from the cargo receiving platform to the cargo compartment or drag the cargo because the floor is not continuous. There is a cover on the front of the loading platform, and "the entire lift is made as much as possible" (paragraph [0033]), but this configuration allows continuity between the loading platform and other floors. It is difficult to completely compensate. Moreover, since the said cover is a structure stored in the floor surface of a cargo compartment at the time of storage of a cargo receiving stand, the upper surface of a cover becomes a level | step difference low with respect to the floor surface of a cargo compartment.

  The present invention has been made in view of the above, and suppresses the longitudinal dimension of the entire apparatus during storage in the rear overhang of a small vehicle to secure the allowance for the rear axle, and during lift-up and storage. It is an object of the present invention to provide a load receiving table lifting / lowering device capable of ensuring good continuity between a floor surface of a load room and a load receiving table.

  (1) In order to achieve the above object, the present invention provides a load receiving platform lifting device that supports loading / unloading of a load to / from a rear luggage compartment of a vehicle, the link mechanisms provided on both left and right sides of the cargo compartment, The load receiving surface is connected to the distal end of the link mechanism, the load receiving surface forms a part of the floor surface of the cargo compartment when ascending, and the load receiving base connected to the distal end of the load receiving base proximal end when unfolded. The pedestal base end and the load receiving surface are continuous, and at the time of storage, the cradle base body part stored in the storage space below the load cradle base end part at the height of the load floor is connected to the link mechanism, A lift driving device is provided that lifts and lowers the load receiving base end together with the load receiving main body.

  (2) In the above (1), preferably, a part of the storage space and the passage space when the unfolded load receiving table is raised and lowered are shared.

  (3) In the above (1) or (2), preferably, when the load receiving base end side of the developed load receiving base is one side in the depth direction and the main body side of the load receiving base is the other side in the depth direction, A guided member provided on the other side portion of the base end portion in the depth direction, and guide means provided on the load receiving body main body portion and having a slit for guiding the guided member, wherein the slit includes the load receiving table. A linear portion that extends in the depth direction of the straight line, and an arc portion that folds downward from one end in the depth direction of the linear portion, and the guided member relatively moves in the slit, thereby The base body portion is raised from the retracted position to the other position in the depth direction and then raised to the deployed position.

  (4) In the above (3), preferably, the guide means is provided on both sides in the width direction of the load receiving base body, and the guided member includes a rolling part that rolls on the slits of both guide means. And a shaft for connecting both rolling parts.

  (5) In the above (4), preferably, a drive motor, a first driven part attached to the shaft, drive transmission means for transmitting a driving force of the drive motor to the first driven part, A second driven part that is provided along the slit and that is driven by the driven part to convert the rotational operation of the driven part into the operation of the main body part along the slit; It is characterized by.

  (6) In the above (3), preferably, the first lock device that fixes the load receiving base body to the load receiving base end in a posture accommodated in the lower part of the load receiving base end, And a second locking device for fixing the main body of the cargo cradle with respect to the base of the cargo cradle in a posture developed to the other side in the depth direction of the base of the cargo cradle.

  (7) In the above (6), preferably, the first lock device and the second lock device are shared.

  (8) In the above (1) or (2), preferably, when the load receiving base end side of the developed load receiving base is one side in the depth direction and the main body side of the load receiving base is the other side in the depth direction, A first shaft that rotatably connects one side portion of the base end portion in the depth direction and the distal end portion of the link mechanism, the other side portion in the depth direction of the base portion of the load receiving base, and the depth of the main body portion of the load receiving base. A second shaft that rotatably connects one side portion in the direction, one end rotatably connected to the link mechanism, and the other end rotatably connected to the other side portion in the depth direction of the cargo receiver body portion. And a guide arm, and the load receiving base is raised to a posture in which the load receiving base main body part faces the load receiving surface downward after raising the connecting base of the load receiving base and the main body of the load receiving base during storage. And it is folded and stored in the lower part of the said receiving stand base end part.

  (9) In the above (8), preferably, the link mechanism includes a stopper that holds the load receiving base end portion in a horizontal posture.

  (10) In the above (9), preferably, the stopper is positioned below the first shaft of the link mechanism, and the load receiving base end when the load receiving base base is in a horizontal posture. Receiving the bottom of the part.

  (11) In the above (9), preferably, the stopper is located above the first shaft of the link mechanism, and the load receiving base end when the load receiving base end is in a horizontal posture. It contacts with the upper surface of the part or the member rotated integrally with this.

  (12) In any one of the above (8) to (11), preferably, the second shaft is disposed so as to be positioned below a bottom surface of the load receiving table when the load receiving table is deployed. It is characterized by being.

  (13) In the above (1) or (2), preferably, when the load receiving base end side of the developed load receiving base is one side in the depth direction and the main body side of the load receiving base is the other side in the depth direction, First engagement means provided on the other side in the depth direction of the base end portion, and second engagement means provided on one side in the depth direction of the load receiving body main body portion and engaged with the first engagement means during deployment. And a pin provided on the other side portion in the depth direction of the cargo cradle body portion, and a guide arm that connects the pin and the link mechanism, and when the cargo cradle body portion moves to the storage position, the first And the second engaging means is disengaged and only the rear portion is restrained by the guide arm, so that the second engaging means is pushed into the lower portion of the base of the load receiving base.

  (14) In any one of the above (1) to (13), preferably, a restraining means for restraining the vertical movement of the load receiving base main body portion with respect to the load receiving base base end portion when in the deployed position. It is characterized by having.

  (15) In the above (14), preferably, the restraining means restrains the movement of the load receiving base main body portion in the depth direction with respect to the load receiving base base end portion at the unfolded position. And

  (16) In any one of the above (1) to (15), preferably, a cover is provided on a base of the cargo compartment, and a base portion of the link mechanism is attached to an upper portion thereof, and the cover includes the link mechanism. It is fixed to the side wall of the luggage compartment at least one of the front and rear sides of the base.

  According to the present invention, the longitudinal dimension of the entire apparatus during storage is kept within the rear overhang of the small vehicle to secure the allowance for the rear axle, and the floor of the luggage compartment during lift-up and storage. Good continuity between the surface and the cargo cradle can be ensured.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a rear perspective view showing an overall structure of a vehicle equipped with a load receiving table lifting apparatus according to a first embodiment of the present invention, and shows a state when the load receiving table is raised. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a rear perspective view showing the overall structure of a vehicle equipped with a load receiving table lifting apparatus according to a first embodiment of the present invention, and shows a state when the load receiving table is lowered. It is a see-through | perspective side view showing the connection structure with respect to the vehicle of the load receiving platform raising / lowering apparatus which concerns on the 1st Embodiment of this invention. It is a principal part enlarged view showing the connection structure with respect to the vehicle of the load receiving platform raising / lowering apparatus which concerns on the 1st Embodiment of this invention. It is the figure which extracted and represented the link mechanism with which the load receiving table raising / lowering apparatus which concerns on the 1st Embodiment of this invention was equipped, and the load receiving stand, and is the perspective view which looked at the whole from the left rear. It is the figure which extracted and represented the link mechanism with which the load receiving table raising / lowering apparatus which concerns on the 1st Embodiment of this invention was equipped, and the load receiving stand, and is the perspective view which expands and represents the left end part vicinity of the load receiving stand. It is the figure which extracted and represented the link mechanism with which the load receiving table raising / lowering device which concerns on the 1st Embodiment of this invention was equipped, and the load receiving stand, and is a side view of the left end part vicinity of a load receiving stand. It is the figure which extracted and represented the link mechanism with which the load receiving table raising / lowering apparatus which concerns on the 1st Embodiment of this invention was equipped, and the load receiving stand, and is a perspective view which expands and represents the right end part vicinity of a load receiving stand. It is the perspective view which extracted and represented the load receiving stand with which the load receiving stand raising / lowering apparatus which concerns on the 1st Embodiment of this invention was equipped. It is a side view of the left end part vicinity of the load receiving stand of the load receiving stand raising / lowering apparatus which concerns on the 2nd Embodiment of this invention. It is an enlarged view of the opposite end part at the time of expansion | deployment of the load receiving base base part and the load receiving base main-body part with which the load receiving stand raising / lowering apparatus which concerns on the 2nd Embodiment of this invention was equipped. It is a perspective view showing the storing operation of the load receiving stand of the load receiving stand raising / lowering apparatus which concerns on the 3rd Embodiment of this invention. It is a perspective view showing the storing operation of the load receiving stand of the load receiving stand raising / lowering apparatus which concerns on the 3rd Embodiment of this invention. It is a perspective view showing the storing operation of the load receiving stand of the load receiving stand raising / lowering apparatus which concerns on the 3rd Embodiment of this invention. It is a perspective view showing the storing operation of the load receiving stand of the load receiving stand raising / lowering apparatus which concerns on the 3rd Embodiment of this invention. It is a perspective view showing the storing operation of the load receiving stand of the load receiving stand raising / lowering apparatus which concerns on the 4th Embodiment of this invention. It is a perspective view showing the storing operation of the load receiving stand of the load receiving stand raising / lowering apparatus which concerns on the 4th Embodiment of this invention. It is a perspective view showing the storing operation of the load receiving stand of the load receiving stand raising / lowering apparatus which concerns on the 4th Embodiment of this invention. It is a figure showing a comparative example. It is a left view showing the whole structure of the vehicle carrying the load receiving table raising / lowering apparatus which concerns on the 5th Embodiment of this invention. It is a rear view showing the whole structure of the vehicle carrying the load receiving table raising / lowering device which concerns on the 5th Embodiment of this invention. It is a top view showing the whole structure of the vehicle carrying the load receiving table raising / lowering apparatus which concerns on the 5th Embodiment of this invention. It is a side view showing the connection structure of the load receiving table raising / lowering device at the time of storage which concerns on the 5th Embodiment of this invention. It is a side view showing the connection structure of the load receiving table raising / lowering apparatus at the time of the work which concerns on the 5th Embodiment of this invention. It is a top view of the load receiving table raising / lowering device at the time of storage which concerns on the 5th Embodiment of this invention. It is a rear view of the load receiving table raising / lowering apparatus at the time of storage which concerns on the 5th Embodiment of this invention. It is a perspective view which extracts and represents the cover with which the load receiving table raising / lowering apparatus which concerns on the 5th Embodiment of this invention was equipped. It is a side view which extracts and represents the load receiving base base part with which the load receiving stand raising / lowering apparatus which concerns on the 5th Embodiment of this invention was equipped. It is a rear view which extracts and represents the load receiving base base part with which the load receiving stand raising / lowering apparatus which concerns on the 5th Embodiment of this invention was equipped. It is a top view which extracts and represents the cradle base end part with which the cradle raising / lowering device which concerns on the 5th Embodiment of this invention was equipped. It is a side view which extracts and represents the load receiving base main-body part with which the load receiving stand raising / lowering apparatus which concerns on the 5th Embodiment of this invention was equipped. It is a rear view which extracts and represents the load receiving stand main-body part with which the load receiving stand raising / lowering apparatus which concerns on the 5th Embodiment of this invention was equipped. It is a top view which extracts and represents the load receiving base main-body part with which the load receiving stand raising / lowering apparatus which concerns on the 5th Embodiment of this invention was equipped. It is the figure which looked at the guide plate with which the load receiving table raising / lowering apparatus which concerns on the 5th Embodiment of this invention was equipped was seen from the vehicle left side. It is a figure showing the detailed structure of the locking device with which the load receiving table raising / lowering apparatus which concerns on the 5th Embodiment of this invention was equipped. It is a perspective view of the load receiving table raising / lowering apparatus which concerns on the 6th Embodiment of this invention, Comprising: The whole figure of the unfolding attitude | position is represented. It is a perspective view of the load receiving table raising / lowering apparatus which concerns on the 6th Embodiment of this invention, Comprising: The principal part enlarged view at the time of an expansion | deployment attitude | position is represented. It is a perspective view of the load receiving table raising / lowering apparatus based on the 6th Embodiment of this invention, Comprising: The whole intermediate posture is represented. It is a perspective view of the load receiving table raising / lowering apparatus which concerns on the 6th Embodiment of this invention, Comprising: The principal part enlarged view at the time of an intermediate position is represented. It is a perspective view of the load receiving table raising / lowering apparatus which concerns on the 6th Embodiment of this invention, Comprising: The whole figure of the storing attitude | position is represented. It is a perspective view of the load receiving table raising / lowering apparatus which concerns on the 6th Embodiment of this invention, Comprising: The principal part enlarged view at the time of a storing attitude | position is represented.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 and 2 are rear perspective views showing the overall structure of a vehicle equipped with a load receiving table lifting apparatus according to the first embodiment of the present invention, and FIG. Reference numeral 2 represents the state when the receiving platform is lowered. The load receiving table lifting device exemplified in each embodiment can be applied to any of so-called small vehicles, medium-sized vehicles, and large vehicles, but FIGS. 1 and 2 illustrate the case where the load receiving device lifting device is mounted on a small vehicle. is doing.

  The vehicle shown in FIGS. 1 and 2 includes a driver's cab 2 provided in front of the vehicle casing 1, a luggage compartment (cargo box) 3 provided on the vehicle casing 1, and a cargo receiver provided in a rear portion of the luggage compartment 3. A platform lifting device 100 is provided. The load receiving platform lifting / lowering device 100 unfolds the load receiving platform (platform) 30 and loads the load floor 3 in the loading room 3 at the time of loading / unloading of a relatively heavy load that requires support for lifting / lowering operations. The cargo handling work is supported by driving up and down between the height and the height of the ground. In the present embodiment, since the opening 4 of the luggage compartment 3 and the opening / closing door 5 are provided at the rear of the luggage compartment 3, the cargo receiving platform lifting device 100 deploys the cargo receptacle 30 at the rear of the luggage compartment 3. However, when there is an opening and an opening / closing door at the side of the luggage compartment 3, the load receiving platform lifting / lowering device 100 is installed so that the load receiving platform is deployed at the side of the vehicle. In the case of this example, since it develops in the rear part of the cargo compartment 3, the front-rear direction is the depth direction of the load receiving platform 30, and the left-right direction is the width direction.

  FIG. 3 is a transparent side view showing the structure of the load receiving table lifting apparatus 100 for the vehicle, and FIG. 4 is an enlarged view thereof.

  As shown in FIGS. 3 and 4, the floor of the luggage compartment 3 extends in the left-right direction, which is arranged on the base frame 6 at an appropriate interval in the front-rear direction, and the base frame 6 at the bottom mounted on the vehicle frame 1. A plurality of beams 7 and a load floor 8 provided on the beams 7 are configured. The upper surface of the base frame 6 is notched at a portion from the rear end portion to the distance L and is one step lower than the other portions, and the rear end of the load floor 8 is located at a distance L from the rear end portion of the cargo compartment 3. There is a space without the load floor 8 above the notch portion of the base frame 6. The upper surface (surface) of the cutout portion of the base frame 6 is covered with a cover 9.

  The loading platform elevating device 100 includes a link mechanism 10 provided on both the left and right sides in the cargo compartment 3, and the loading platform 30 provided at the tip of the link mechanism 10 to move up and down between the load floor height and the ground height. And.

  The link mechanism 10 includes a base bracket 11 disposed at the left and right rear ends of the load floor 8, and base end side first arms 12 each having a base end connected to the base bracket 11 via pins 15 and 16. A proximal-side second arm 13 and a distal-side arm 14 having proximal ends connected to the distal ends of the proximal-side arms 12 and 13 via pins 17 and 18 are provided. The base end side arms 12 and 13 are rotated in the vertical direction within a vertical plane along the front and rear direction, and the front end side arm 14 is moved up and down. The proximal first arm 12 is positioned above the proximal second arm 13 that tilts backward when tilted backward. The load receiving platform 30 is fixed to the distal end side of the distal arm 14. As shown in FIG. 3, the shape connecting the centers of the pins 15-18 is substantially a parallelogram, and the proximal arms 12 and 13 form a parallel link. Therefore, when the base end side arms 12 and 13 turn up and down, the distal end side arm 14 and the load receiving platform 30 supported by the arm 14 are maintained in the posture (with the load receiving surface kept substantially horizontal). Move. Further, if the base end side first arm 12 (the length between the pins 15 and 17) is slightly longer than the length of the base end side second arm 13 (the length between the pins 16 and 18), the load receiving base 30 As the position goes down, it tilts back slightly, and comes in contact with the ground from the tip.

  The left and right link mechanisms 10 are each provided with a lift drive device (cylinder) 20. The lift drive device 20 has both ends connected to a pin 21 provided between the pins 16 and 18 in the base end side second arm 13 and the pin 17 at the tip end of the base end side first arm 12, respectively. The cargo receiving platform 30 moves up and down with the operation. The lift drive device 20 can be applied to both electric and hydraulic pressures.

  At this time, for example, in the case of a so-called retractable load receiving device lifting / lowering device A that stores a load receiving platform P in the lower part of a medium-sized or larger vehicle as shown in FIG. In this embodiment, the link mechanism 10 stands upright (the posture shown in FIGS. 3 and 4) when in the retracted position. Although not particularly illustrated, a cover that secures a storage space for the link mechanism 10 is provided on the left and right sides of the luggage compartment 3, and the luggage compartment is accommodated in the cover when the link mechanism 10 is erected (when the storage mechanism is shifted to the retracted position). 3 can be prevented from interfering with the load in the bag.

  The load receiving table 30 includes a load receiving base end portion 31 attached to the front end portion of the link mechanism 10 (front end side arm 14), and a load receiving stand main body portion 32 that forms a continuous load receiving surface together with the load receiving base end portion 31. It has.

  The load receiving base end portion 31 comes to a position subsequent to the load floor 8 of the load chamber 3 when rising, and the load receiving surface constitutes a part of the floor surface of the load chamber 3 (states of FIGS. 3 and 4). When the load receiving base end 31 is in the raised position, a gap is interposed between the lower surface of the load receiving base 31 and the upper surface of the cutout portion (cover 9) of the base frame 6, and this gap is the load receiving main body. 32 (the broken line in FIG. 4 represents the cargo receiving table main body 32 stored in the storage space). This storage space is partially shared with the passing space at the time of raising and lowering the developed load receiving table 30, and a locus R (see FIG. 4) at the lower front end of the load receiving base 31 is stored in the load receiving main body 32. It overlaps with space.

  On the other hand, the load receiving base main body 32 is connected to the rear end of the load receiving base end 31 when unfolded so that the load receiving base 31 and the load receiving surface are continuous, and when stored (the load receiving base 31 is in the raised position). In this case, it moves to the lower part of the load receiving base end 31 and is stored in the storage space below the load receiving base 31 at the height of the load floor 8.

  The front and rear dimensions of the load receiving base end 31 and the load receiving main body 32 are about the same as or slightly smaller than the notch L at the rear end of the base frame 6. The load receiving platform 30 in the retracted position is accommodated in the notch. Moreover, the recessed part 33 and the convex part 34 are each provided in the opposing end surface of the goods receiving base base end part 31 and the goods receiving base main-body part 32, and when the recessed part 33 and the convex part 34 fit, it is a load receiving stand in the deployment position. The vertical movement of the main body 32 relative to the load receiving base 31 is restricted. The positional relationship between the concave portion 33 and the convex portion 34 may be reversed.

  In addition, since the load receiving base main body 32 is supported by hanging the rear end portion from the distal end side arm 14 of the front link mechanism 10 by a rod 56 described later, The supporting structure receives a biasing force toward the load receiving base end portion 31 side. However, in order to more securely fix the load receiving body main body 32 to the load receiving base base end 31 during deployment, a lock provided with a separate portion, such as a bag, between the load receiving base main body 32 and the load receiving base base end 31. It can also be set as the structure connected by a means.

  Here, a mounting structure of the cargo receiving table main body 32 will be described.

  5 to 8 are diagrams showing the distal end side arm 14 and the load receiving table 30 extracted from the link mechanism 10, FIG. 5 is a perspective view of the whole viewed from the left rear, and FIG. 6 is the vicinity of the left end of the load receiving table 30. 7 is an enlarged perspective view, FIG. 7 is a side view of the vicinity of the left end portion of the load receiving table 30, and FIG. 8 is an enlarged perspective view of the vicinity of the right end portion of the load receiving stand 30. FIG. 9 is a perspective view showing the cargo receiving stand 30 extracted.

  As shown in FIGS. 5 to 9, the rotor unit 40, which is a guided member, is provided at the rear portion of the load receiving base end portion 31, and guide means for guiding the rotor unit 40 is provided on the left and right sides of the load receiving base body portion 32. A guide plate 41 is provided.

  The guide plate 41 is attached to the left and right side surfaces of the cargo receiving table main body 32 in a vertical posture so as to follow the front-rear direction, and opens a slit 42 that guides the rotor unit 40 in the left-right direction. The vicinity of the upper rear ends of the left and right guide plates 41 is connected via a rod 56 to a support member 55 fixed to the distal arm 14 of the link mechanism 10. Both ends of the rod 56 are rotatably connected to the support member 55 and the guide plate 41.

  The slit 42 includes a straight line portion 43 extending in the front-rear direction of the load receiving platform 30 and an arcuate portion 44 that is folded downward from the front end portion of the straight line portion 43, and is formed in a “J” shape. The length of the straight line portion 43 is about the size in the front-rear direction of the load receiving table main body portion 32, and the arc portion 44 is formed to draw a semicircle. A rack gear 48, which is a driven portion of a gear 47 (described later), is provided on the outer wall surface (the surface facing the outer side in the left-right direction) of the guide plate 41 along the inner side of the track of the slit 42. In the present embodiment, from the viewpoint of ease of manufacture, an annular chain is hung around two gears (only the front one is shown) that are non-rotatably attached to the outer wall surface of the guide plate 41, and a slit in the outer periphery of this chain A portion along 42 is used as a rack gear 48. However, the configuration of the rack gear 48 is not limited to this, and the rack gear 48 can be formed exclusively by machining it so that the tooth surface is along the slit 42 as appropriate. Alternatively, the rack gear 48 may be provided on the inner wall surface (the surface facing the inner side in the left-right direction) of the guide plate 41.

  The rotor unit 40 includes a bearing 45 that is a rolling part that rolls on the slits 42 of both guide plates 41, a shaft 46 that connects both the bearings 45, and a shaft 46 that is rotatable with respect to the load receiving base 31. And a supporting bearing 39. The shaft 46 penetrates the load receiving base end portion 31 in the left-right direction, and both end portions project outward from the guide plate 41 through the slit 42. Gears 47 that are driven parts that receive a driving force from a drive motor 50 (described later) are fixedly attached to both ends of the shaft 46, and these gears 47 mesh with the left and right rack gears 48. The bearing 45 is disposed inside the gear 47 and is attached to the shaft 46 so as to be positioned in the slit 42. The diameter of the outer peripheral portion of the bearing 45 needs to be dimensioned so that the rack gear 48 is not detached from the gear 47 even when the outer peripheral surface of the bearing 45 is in contact with the inner wall on the outer peripheral side of the slit 42. The bearing 39 is attached to the shaft 46 so as to be located inside the bearing 45.

  Of the left and right gears 47 of the rotor unit 40, the left (or right) gear 47 is longer to the left and right than the right gear 47, and has a tip protruding outside the rack gear 48. Here, an electrically driven (or hydraulically driven) drive motor 50 is attached to the distal end side arm 14 on the left side (long gear 47 side) of the link mechanism 10 via a support member 49. A chain 52 as drive transmission means is hung between a portion of the left gear 47 protruding outward from the rack gear 48 and a gear 51 fixed to the output shaft of the drive motor 50, and the drive force of the drive motor 50 is applied to the chain. 52 is transmitted to the gear 47 through 52.

  Next, the operation and effects of the load receiving table lifting apparatus 100 having the above configuration will be described.

  When the use of the load receiving platform lifting / lowering device 100 is started, a predetermined operation is performed with an operating device (not shown), and the load receiving stand main body portion 32 (in the state of the broken line in FIG. 4) is moved to the subsequent position of the load receiving stand base end portion 31. The cargo receiving platform 30 is developed by moving to. When a predetermined operation is performed by the operating device, the drive motor 50 is rotationally driven, and the driving force of the drive motor 50 is transmitted through the chain 52, so that the rotor unit 40 is rotationally driven. The rotational movement of the rotor unit 40 is converted into a propulsive force of the load receiving table main body 32 via a rack gear 48 that meshes with the gear 47 of the rotor unit 40. When a thrust is applied to the load receiving table main body 32 in this manner, the bearing 45 of the rotor unit 40 relatively moves in the slit 42 and reaches the lower end of the arc portion 44 from the rear end portion of the linear portion 43, and the load receiving table main body. The part 32 keeps the load receiving surface facing upward, slides backward as shown by a solid arrow in FIG. 4, and then turns back and moves forward to move to a position subsequent to the load receiving base end 31.

  When the load receiving platform 30 is stored, the reverse procedure is performed when the load receiving platform base end 31 is at the load floor height, the door 5 of the load chamber 3 is closed, and the entire load receiving platform lifting device 100 is loaded. Housed in chamber 3.

  When carrying out the cargo handling work, if a predetermined operation is performed with an operating device (not shown) after the loading platform 30 is deployed, the lift driving device 20 provided in the link mechanism 10 is contracted, and the loading platform 30 is lowered from the height of the loading floor to the ground. It descends to a height (see FIGS. 1 and 2). When the cargo receiving platform 30 is raised, the lift driving device 20 is extended by performing a predetermined operation on the operation unit. It is guided by the link mechanism 10 and moves up and down between the height of the load floor and the height of the ground while maintaining a substantially horizontal posture.

  As described above, the load receiving platform lifting / lowering device 100 according to the present embodiment has a configuration in which the load receiving platform base end 31 forms a part of the floor surface of the cargo compartment 3 when it is raised, and a part of the floor surface of the cargo compartment 3 is used as the load receiving platform. We are using. In the present embodiment, since the base end side first arm 12 is inclined slightly rearward when retracted (the pin 17 is located behind the pin 15), at least one load carrier 30 is raised during cargo handling work. Since the portion enters the cargo compartment 3, when the cargo cradle 30 is lowered by the parallel link from the raised position, a corresponding space that avoids the track of the cargo cradle 30 at the lower portion of the load cradle base end 31 is appropriately provided. Necessary. Therefore, in the present embodiment, the load receiving table 30 is divided into front and rear, and only the first half of the load receiving table base end portion 31 forms a part of the floor surface of the load chamber 3 during storage, and the load receiving table at the rear end of the load chamber 3. The space created in the lower part of 30 is configured to be used as a storage space for the cargo receiving body part 32 in the latter half. With this configuration, the front and rear dimensions of the load receiving platform lifting device 100 can be shortened, and even if the target of application is a relatively small vehicle of a medium size vehicle or less, as shown in FIGS. It can be accommodated within the distance (rear overhang) to the rear end of the vehicle frame 1. Therefore, the longitudinal dimension of the entire device during storage is kept within the rear overhang of the small vehicle, and good continuity between the floor 8 of the cargo compartment 3 and the load receiving platform 30 during lift-up and storage is ensured. Therefore, it is not necessary to raise the floor surface of the luggage compartment 3 in consideration of the amount of jumping of the axle of the rear wheel of the vehicle 1, which is advantageous in securing the capacity of the luggage compartment 3. In addition, since the load receiving platform 30 (the load receiving base 31) is part of the floor surface of the cargo compartment 3 when stored, the load receiving lift 100 does not get in the way when not in use. There will be no hindrance to cargo handling work that does not use.

  In addition, when handling a lot of light loads, there may be a case where the frequency of the cargo handling work without using the load receiving platform lifting apparatus 100 is high and the cargo handling work is not used for a long time. In this case, when it is configured to be partially exposed to the outside world during storage, it may not be able to operate smoothly due to adhesion of driving parts such as the lift driving device 20 or adhesion of mud or dust. Can also happen. In addition, there is a possibility that the vehicle may collide with an obstacle while being damaged on a bad road surface, and the maintenance work is required. On the other hand, in the load receiving platform lifting apparatus 100 of the present embodiment, if the opening / closing door 5 of the luggage compartment 3 is closed in the retracted position, the wall surface of the luggage compartment 3 and the opening / closing door 5 are completely covered. Since the dirt is suppressed and does not directly collide with an obstacle, the labor required for maintenance is reduced. Furthermore, when handling a light load without using the load receiving platform lifting device 100, the cargo handling operation can be performed by opening only one of the doors 5 (two on the left and right in FIG. 1) shown in FIG. Yes, work efficiency is good.

  In this embodiment, a configuration in which a chain and a gear are combined is used as the power transmission mechanism. However, for example, a pulley may be used instead of the gears 47 and 51, and a belt may be used instead of the rack gear 48 and the chain 52. The drive motor 50 and the chain 52 may be omitted, and the load receiving platform 30 may be manually deployed and stored. Further, the case where the rack gear 48 is placed along the inside of the track of the slit 42 and the gear 47 of the rotor unit 40 circumscribes the rack gear 48 when the bearing 45 is in the arc portion 44 of the slit 42 has been described as an example. The rack gear 48 may be provided along the outside of the track of the slit 42. In this case, when the bearing 45 is in the arc portion 44 of the slit 42, the gear 47 of the rotor unit 40 is inscribed in the rack gear 48, and the number of teeth meshing simultaneously with the gear 47 and the rack gear 48 is increased in the arc portion 44 as compared with the case of being circumscribed. Therefore, improvement in power transmission efficiency and operational stability can be expected.

  FIG. 10 is a side view of the vicinity of the left end of the load receiving platform of the load receiving platform lifting apparatus according to the second embodiment of the present invention, and corresponds to FIG. 7 of the first embodiment. FIG. 11 is an enlarged view of the opposite end portion when the load receiving base end 31 and the load receiving main body 32 are unfolded.

  In the first embodiment, the load receiving base at the unfolded position by providing the concave portion 33 and the convex portion 34 that are engaged and disengaged in the front-rear direction at the opposite ends of the load receiving base end portion 31 and the load receiving base body portion 32. In the present embodiment, the movement in the front-rear direction is restricted in addition to the movement in the vertical direction. .

  That is, as shown in FIG. 11, a hook 61 having a recessed portion 60 opened upward is provided at the rear end of the load receiving base end portion 31 so as to protrude rearward. A hook 63 having a projection 62 protruding downward is projected forward. In a state where the hook 63 is hooked on the hook 61 and the concave portion 60 and the convex portion 62 are engaged, the load receiving base end portion 31 including the hooks 61 and 63 and the load receiving surface of the load receiving base body portion 32 are continuous. In this state, even if a load is applied to the load receiving body main body 32, the load receiving body main body 32 does not shift downward from the load receiving base base end portion 31, and the load receiving body main body 32 moves rearward and the load receiving base. There is no separation from the base end 31. Of course, since the load receiving base end portion 31 is supported by the link mechanism 10, only the load receiving base end portion 31 on the base end side does not descend with the load receiving base body portion 32 placed.

  In the first embodiment, the concave portion 33 and the convex portion 34 are configured to engage in the front-rear direction, but in the present embodiment, the concave portion 60 and the convex portion 62 are configured to engage in the vertical direction. Therefore, in the present embodiment, the diameter and the central angle of the arc portion 44 of the slit 42 of the guide plate 41 are made larger than those in the first embodiment. In other words, in the first embodiment, the diameter of the center line of the arc portion 44 is substantially equal to the height difference between the load receiving surfaces of the load receiving base main body portion 32 and the load receiving base end portion 31 during storage. In the present embodiment, as shown in FIG. 10, the diameter of the center line of the arc portion 44 is set so that the load receiving body main body 32 and the load receiving base base end when stored. The central angle of the center line of the arc portion 44 is greater than 180 degrees, which is greater than the height difference of the receiving surface of the portion 31. In the present embodiment, the height difference H1 between the center of the tip of the arc portion 44 and the center of the straight portion 43 is substantially equal to the height difference of the load receiving surfaces of the load receiving base body 32 and the load receiving base end 31 during storage, The height difference H2 between the center of the tip of the arc portion 44 and the lowest point of the center line of the arc portion 44 is larger than the meshing height H3 (see FIG. 11) of the concave portion 60 and the convex portion 62.

  That is, for example, when the load receiving body main body 32 moves from the retracted position to the deployed position, if the bearing 45 (see FIG. 6) reaches the arc portion 44 of the slit 42, the load receiving body main body 32 is the first embodiment. The bearing 45 is turned up while drawing a large arc as compared with the above, and when the bearing 45 reaches the lowermost part of the slit 42, it rises to a place where the load receiving surface becomes higher than the load receiving base end portion 31. Thereafter, relative to the bearing 45 moving toward the tip of the arc portion 44, the load receiving body main body 32 descends while moving forward, and at this time, the convex portion 62 of the load receiving body main body 32 is moved to the load receiving base base end 31. It fits into the recessed part 60 of this from above.

  This embodiment has the same configuration as that of the first embodiment except for the above points, and the same effect can be obtained. In addition, in the present embodiment, since the movement of the load receiving base body 32 in the front-rear direction with respect to the load receiving base end 31 is restricted when the load receiving base is deployed, a sense of rigidity and stability when using the load receiving base 30 is further increased. Can be improved.

  12-15 is a perspective view showing the storage operation of the load receiving platform of the load receiving platform lifting / lowering apparatus according to the third embodiment of the present invention.

  In the first and second embodiments, a configuration is adopted in which the load receiving body main body 32 is slid and stored in the lower part of the load receiving base base end 31. In the present embodiment, the load receiving body main body 32A is used as the load receiving base. The rear end portion of the base end portion 31A is rotatably connected, and is folded at the lower portion of the load receiving base end portion 31A. Although the operation of unfolding and storing the load receiving table 30A is assumed to be manual, it may be configured to be unfolded and stored using a driving device.

  The load receiving table lifting / lowering device 100A of the present embodiment includes a first shaft 70 that rotatably connects the front side portion of the load receiving table base end portion 31A and the front end portion of the front end side arm 14 of the link mechanism 10, and a load receiving stand. The rear side portion of the base end portion 31A and the front side portion of the load receiving base main body portion 32A (the hinge portions provided at the opposite end portions of the load receiving base base end portion 31A and the load receiving base main body portion 32A) are rotatably connected. The second shaft 71 and one end thereof are rotatably connected to the distal arm 14 of the link mechanism 10 via a pin 72, and a long hole 74 that guides a pin 73 provided on the rear side portion of the cargo receiving body main body 32A. And a guide arm 75 having at the other end.

  Strictly speaking, the “pin” 73 is not shown in FIGS. 12 to 15, but a reference numeral 73 is attached to a pin insertion hole provided in the cargo receiving table main body 32 </ b> A instead of the pin. Although not particularly illustrated, the pin 73 extends from the load receiving table main body 32A to the left and right by a predetermined distance, and reaches the elongated hole 74 of the guide arm 75 that rotates outside the distal arm 14 of the link mechanism 10. .

  Further, in the present embodiment, unlike the first embodiment, the load receiving base base end portion 31A is not in a fixed relationship with the distal arm 14 of the link mechanism 10, and is connected to the distal end side via the first shaft 70. The arm 14 is rotatably connected. Therefore, for the purpose of limiting the lower limit of the rotation range of the load receiving base end 31A and maintaining the horizontal posture of the load receiving base 31A, the lower end of the front arm 14 (below the first shaft 70). In addition, a stopper 76 for receiving the bottom surface of the load receiving base base end portion 31A in a horizontal posture is provided on the inner side (the load receiving base 30A side).

  In addition, the hinge portion that connects the load receiving base 31A and the load receiving main body 32A with each other is a business trip to the lower part of the load receiving base 30A in the unfolded posture, and the load receiving base 31A and the load receiving main body 32A. The second shaft 71, which is a connecting fulcrum of the first position, is located below the bottom surface of the load receiving platform 30A when the load receiving platform 30A is deployed. By offsetting the second shaft 71 to the lower side of the load receiving table 30A in this way, the load receiving table main body 32A can be folded in a posture parallel to the load receiving table base end 31A as shown in FIG. Further, bending of the receiving platform 30A in the deployed posture can be suppressed. That is, when a load is applied from above to the load receiving platform 30A in the deployed posture in which both front and rear ends are supported by the first shaft 70 and the pin 73, the load is bent in a convex state downward. However, since the second shaft 72 is positioned below the load receiving table 30A, the moment around the second shaft 71 is constrained at the opposing end surfaces of the load receiving base end portion 31A and the load receiving table main body portion 32A. Further, it is possible to suppress the load receiving table 30A from being bent downwardly.

  At this time, the left and right side surfaces of the load receiving table main body 32A are cut out so that a portion excluding the hinge portion (a front end portion connected to the load receiving table base end portion 31A) forms a step inward from the hinge portion. Thus, by providing the notch portion in this way, interference between the load receiving table main body portion 32A and the stopper 76 is avoided in the intermediate form during deployment / storage (see FIG. 14).

  With the above-described configuration, when the cargo receiving platform 30A is stored from the unfolded state (see FIG. 12), the cargo receiving platform base end portion 31A and the connection portion of the cargo receiving platform main body 32A are raised (see FIG. 13). The base body 32A is inverted to a posture in which the receiving surface faces downward (see FIG. 14), and is folded and stored at the lower part of the receiving base base end 31A (see FIG. 15).

  Except for the above-described configuration and operation, the present embodiment is the same as the first embodiment, and when stored, the load receiving base 31A constitutes a part of the floor surface of the load chamber 3, and the load receiving base The receiving cradle body portion 32A is stored in the storage space below the portion 31A. Even with such a configuration, substantially the same effect as that of the first embodiment can be obtained.

  FIGS. 16-18 is a perspective view showing the storing operation of the load receiving platform of the load receiving platform lifting / lowering apparatus according to the fourth embodiment of the present invention. In these drawings, the members already described are denoted by the same reference numerals as those of the above-described embodiment, and the description thereof is omitted.

  The load receiving platform lifting / lowering device 100B of the present embodiment is close to the configuration in which the rotor unit 40, the guide plate 41, and related components are omitted in the first embodiment, and when the load receiving stand 30B is deployed (in the case of storage) Is a reverse procedure), and is an example in which the load receiving base body 32B is pulled out rearward and the front end of the load receiving base 32B is engaged with the rear end of the load receiving base 31B. The end portion 31B and the load receiving table main body portion 32B are separated from each other.

  The load receiving table lifting / lowering device 100B is provided in the vicinity of the front end of the side surface of the side surface of the load receiving table main body 32B and the bracket 80 as the first engaging means provided at the rear end of the load receiving table base end 31B. The pin 81 which is the second engaging means for engaging with the bracket 80, the pin 82 provided in the vicinity of the rear end portion of the side surface of the load receiving table main body portion 32B, the pin 82 and the front end side arm 14 of the link mechanism 10 are coupled. The guide arm 83 is provided.

  The vicinity of the upper end of the guide arm 83 is rotatably connected to the upper portion of the distal arm 14 of the link mechanism 10 via the pin 18. On the other hand, a long hole 85 is provided in the vicinity of the lower end of the guide arm 83, and the lower end side of the guide arm 83 is connected to the load receiving body 32B by passing the pin 82 of the load receiving body 32B through the long hole 85. It is connected so that it can rotate. The load receiving base end portion 31B is in a fixed relationship with the distal arm 14 of the link mechanism 10 as in the first and second embodiments.

  The bracket 80 and the pin 81 are engaged in the front-rear direction. When these are engaged (when the load receiving base 30B is deployed as shown in FIG. 16), the load receiving base body portion 32B has a rear end portion. Is supported by the guide arm 83 so as to be suspended from the distal arm 14 of the link mechanism 10 on the front side. As in the first and second embodiments, the urging force is applied to the load receiving base end portion 31B side. So that it does n’t come off. Although not shown, for example, when the entrance of the slit of the bracket 80 is turned upward and the lower end of the slit is bent forward, the load receiving base 30B is expanded and the load receiving base end 31B and the load receiving main body 32B are connected. In addition, by inserting the pin 81 from above into the bracket 80 and sliding it forward a little, it is possible to have an engaging structure that restrains the movement of the pin 80 up and down and forward and backward.

  In the present embodiment, for example, when the load receiving platform 30B is deployed from the storage position (see FIG. 18), the load receiving platform main body 32B stored in the storage space below the load receiving platform base end portion 31B is manually operated. Pull back (see FIG. 17). At this time, the rear end of the load receiving table main body 32B is supported by the guide arm 83, and the front side is not restrained. When the load receiving base body 32B is pulled out, the pin 81 at the front end of the load receiving base body 32B is inserted into the bracket 80 at the rear end of the load receiving base end 31B, and the subsequent position of the load receiving base main body 32B is positioned behind the load receiving base end 31B. (See FIG. 16). The procedure for storing the load receiving base body 32B in the unfolded posture (see FIG. 16) is the reverse, and the load receiving base main body 32B is disengaged from the bracket 80 and the pin 81, and only the rear part is restrained by the guide arm 83. In this state (see FIG. 17), it is pushed into the storage space below the load receiving base 31B (see FIG. 18).

  Except for the configuration and operation described above, the present embodiment is the same as the first embodiment, and when stored, the load receiving base end portion 31B constitutes a part of the floor surface of the load chamber 3, and the load receiving base base end. The receiving platform main body 32B is stored in the storage space below the part 31B. Even with such a configuration, substantially the same effect as that of the first embodiment can be obtained.

  Moreover, since it is a manual deployment type, a drive device and a drive transmission mechanism necessary for the deployment and storage of the load receiving platform 30 can be omitted, and effects such as reduction in the number of parts, space saving, and weight reduction can be obtained.

  20-22 is a figure showing the whole structure of the vehicle carrying the loading platform raising / lowering apparatus based on the 5th Embodiment of this invention, FIG. 20 is a left view, FIG. 21 is a rear view, FIG. It is a top view.

  The vehicle shown in FIGS. 20 to 22 includes a driver's cab 102 provided in front of the car frame 101, a cargo box (cargo box) 103 provided on the car frame 101, and a cargo receiver provided in the rear part of the cargo room 103. A table lifting device 100C is provided. The load receiving platform lifting / lowering device 100C expands the load receiving platform (platform) 130 and loads the load floor 103 in the loading floor 103 at the time of loading / unloading of a relatively heavy load that requires support for loading / unloading (lifting / lowering) work. The cargo handling work is supported by driving up and down between the height and the height of the ground. In the present embodiment, since the opening 104 of the luggage compartment 103 and its opening / closing door 105 are provided at the rear part of the cargo compartment 103, the cargo receiver lifting device 100C deploys the cargo receptacle 130 at the rear part of the cargo compartment 103. However, when there is an opening and an opening / closing door at the side of the cargo compartment 103, the load receiving platform lifting / lowering device 100C is installed so that the load receiving platform is deployed at the side of the vehicle. In the case of this example, since it develops in the rear part of the cargo compartment 103, the front-rear direction is the depth direction of the load receiving platform 130, and the left-right direction is the width direction.

  FIGS. 23 and 24 are side views showing a structure for connecting the load receiving table lifting apparatus 100C to the vehicle. FIG. 23 shows the load receiving table lifting apparatus 100C stored, and FIG. 24 shows the load receiving table lifting apparatus 100C working. FIG. 25 is a plan view of the load receiving table lifting / lowering device 100C during storage, and FIG. 26 is a rear view.

  As shown in FIGS. 23 to 26, the floor of the luggage compartment 103 extends in the left-right direction, which is arranged on the base frame 106 at an appropriate interval in the front-rear direction, and the base frame 106 at the bottom mounted on the vehicle frame 101. It comprises a plurality of beams (not shown) and a load floor 108 provided on these beams. The upper surface of the base frame 106 is notched in a stepped manner in which a portion from the rear end portion to the distance R rises forward and is lower than the load floor 108, and there is a load above the notch portion of the base frame 106. There is no floor 108. The upper surface of the cutout portion of the base frame 106 is covered with a cover 109.

  FIG. 27 is a perspective view showing the cover 109 extracted.

  As shown in FIG. 27, the cover 109 includes an upper horizontal plane 109a, a lower horizontal plane 109b that is one level lower than the upper horizontal plane 109a, an upper vertical plane 109c that rises from the front end of the upper horizontal plane 109a, and a lower level that connects the upper and lower horizontal planes 109a and 109b. The vertical surface 109d is formed in a staircase shape that descends backward. The upper horizontal surface 109a is firmly fixed to the base frame 106 of the vehicle luggage compartment 103 by bolts and nuts (not shown) or the like. A reinforcing member 99 that reinforces the cover 109 is fixed to the upper horizontal surface 109a on the back side of a portion that fixes a base bracket 111 (described later) of the link mechanism 110. The upper and lower vertical surfaces 109c and 109d are firmly fixed to a bracket (not shown) attached to the left and right side walls of the luggage compartment 103 by bolts and nuts (not shown).

  23 to 26, the load receiving platform lifting / lowering device 100 </ b> C includes a link mechanism 110 provided on both the left and right sides in the cargo compartment 3, and a front end portion of the link mechanism 110 between the load floor height and the ground height. And the above-described load receiving table 130 that moves up and down.

  The link mechanism 110 has basically the same configuration as the link mechanism 10 described in the first embodiment. That is, a base bracket 111 disposed on both left and right sides of the upper horizontal surface 109a of the cover 109, a beam 111a in which the upper and lower base brackets 111 are connected and the upper surface is continuous with the rear end of the load floor 108, and the pins 115 are connected to the left and right base brackets 111. 116, the proximal end side first arm 112 and the proximal end side second arm 113 connected to the proximal end side through 116, respectively, and the proximal end side of the proximal end side of these proximal end arms 112, 113 through the pins 117, 118 A connected distal arm 114 is provided. The proximal-side arms 112 and 113 are rotated and displaced between the standing posture shown in FIG. 23 and the backward posture and the lying posture shown in FIG. 24, so that the distal-side arm 114 moves up and down. The left and right link mechanisms 10 are each provided with a lift drive device (cylinder) 120. The lift driving device 120 is connected at both ends to a pin 121 provided between the pins 116 and 118 in the proximal second arm 113 and the pin 117 at the distal end of the proximal first arm 112, respectively. The proximal side arms 112 and 113 tilt with the expansion and contraction operation. The lift driving device 120 can be applied to both electric and hydraulic pressures.

  The load receiving stand 130 includes a load receiving base end portion 131 attached to the front end portion of the front end side arm 114 of the link mechanism 110, and a load receiving stand main body portion 132 that forms a continuous load receiving surface together with the load receiving stand base end portion 131. I have. The dimensions taken in the front-rear direction of the load receiving base end part 131 and the load receiving base body part 132 together with the beam 111a of the link mechanism 110 are equal to or more than the size R of the notch at the rear end of the base frame 106. The beam 111a in the retracted position and the load receiving table 130 are accommodated in the cutout portion of the base frame 106.

  FIG. 28 is a side view showing the cargo receiving base end portion 131 extracted, FIG. 29 is a rear view, and FIG. 30 is a plan view.

  As shown in FIGS. 28 to 30, the load receiving table base end portion 131 includes a plate-shaped load receiving surface portion 133 that extends left and right with the load receiving surface facing upward, and bracket portions 134 provided at both left and right end portions of the load receiving surface portion 133. And.

  The load receiving surface 133 of the load receiving base end portion 131 comes to a position following the beam 111a of the link mechanism 110 when ascending, and the load receiving surface forms a part of the floor surface of the load chamber 103 together with the beam 111a (FIGS. 23 and 25). And the state of FIG. When the load receiving base end portion 131 is in the raised position, a gap is interposed between the load receiving surface portion 133 and the lower horizontal surface 109b of the cover 109, and this gap becomes a storage space for the load receiving main body portion 132 (FIG. 23). reference). This storage space is partially shared with the passing space at the time of raising and lowering the developed load receiving table 130, and the locus at the time of raising and lowering at the lower front end of the load receiving base end 131 is the same as the first embodiment. It overlaps with 132 storage spaces.

  The bracket portion 134 extends in the vertical direction, and includes a plurality (two in this example) of pipes 135 through which bolts 136 (see FIG. 23 and the like) for attaching the bracket portion 134 to the distal end side arm 114 of the link mechanism 110 are passed. I have. Cover the distal end arm 114 on the pipe 135, align the bolt holes, and fasten the nut 137 (see FIG. 23, etc.) through the bolt 136 to fix the load receiving base base end 131 to the distal end arm 114 of the link mechanism 110. Is done. In addition, a locking device 138 (described later) is provided at the rear portion of the bracket portion 134 to selectively restrain the load receiving base main body portion 132 with respect to the load receiving stand base end portion 131 in either the retracted posture or the deployed posture. . Further, a rotor unit 140 (described later) is provided at the rear portion of the load receiving base end portion 131 so as to penetrate the rear portion of the load receiving surface portion 133 from side to side.

  FIG. 31 is a side view showing the main body 132 extracted, FIG. 32 is a rear view, and FIG. 33 is a plan view.

  As shown in FIGS. 31 to 33, the load receiving table main body 132 includes a plate-shaped load receiving surface portion 141a extending left and right with the load receiving surface facing upward, and bracket portions 141b provided at both left and right ends of the load receiving surface portion 141a. The guide plate 141c provided on the outer wall portion of the bracket portion 141b, and pins 141d and 141e that engage with the locking device 138 are provided.

  The load receiving body main part 132 causes the load receiving surface part 133a of the load receiving base end part 131 to follow the load receiving surface part 141a at the time of deployment, and the load receiving floor 108 at the time of storage (assuming that the load receiving base end part 131 is in the raised position). It is moved and stored in the storage space below the load receiving base end portion 131 at the height. A handle 139 is provided at the center of the rear end surface of the cargo receiving surface portion 141a in the vehicle width direction in consideration of convenience when the cargo receiving body main body 132 is pulled out to the deployed position.

  A bracket 155 extends upward from the rear end of the left and right bracket portions 141b. The bracket 155 is connected to the distal arm 114 of the link mechanism 110 via a rod 156 (see FIG. 24 and the like). It is connected. Both ends of the rod 156 are rotatably connected to the distal arm 114 and the bracket 155.

  FIG. 34 is a view of the guide plate 141c as seen from the left side of the vehicle.

  As shown in this figure, the guide plate 141c has a slit 142 for guiding the rotor unit 140 opened in the left-right direction. Of the inner peripheral surface of the slit 142, the upper side and the front side are processed into a gear shape to form a rack gear 148. The rack gear 148 has a straight line portion 143 extending in the front-rear direction and an arcuate portion 144 that folds downward from the front end of the straight line portion 143, and is formed in a “J” shape. The length of the straight line portion 143 is about the size in the front-rear direction of the load receiving surface portion 141a of the load receiving base body portion 132, and the arc portion 144 is formed to draw a semicircle. The rack gear 148 meshes with the rotor unit 140 of the load receiving base end portion 131 described above.

  The rotor unit 140 is press-fitted into a gear 147 that is passed through the slits 142 of both guide plates 141 c and meshes with the rack gear 148, a shaft 146 that couples both gears 147, and a bracket portion 134 of the load receiving base end portion 131. And a bearing (not shown) for rotatably supporting the motor. The shaft 146 penetrates the load receiving table base end portion 131 in the left-right direction, and both end portions project outside the guide plate 141 c through the slit 142. The gear 147 is fixedly attached to both ends of the shaft 146 and meshes with the rack gear 148. The gear 147 has such a size that it does not mesh with the rack gear 148 within the slit 142.

  FIG. 35 shows the detailed structure of the locking device 138 described above.

  As shown in FIG. 35, the locking device 138 includes a hook 150 that is rotatably provided at the rear end portion of the bracket portion 134 of the load receiving base end portion 131 and a hook 150 at the rear end portion of the bracket portion 134. A bracket 151 provided to be pivotable upward, a link 152 having both ends pivotably coupled to the hook 150 and the bracket 151, and a lever 153 attached to the bracket 151 are provided. That is, when the lever 153 is rotated back and forth, the hook 150 moves up and down via the bracket 151 and the link 152, and the recessed portion 154 opened rearward at the rear end lower portion of the bracket portion 134 of the load receiving base end portion 131. When the pin 141d or 141e of the load receiving body main body 132 is received in the hook 150, the pin 141d or 141e is restrained by the hook 150, and the load receiving body main body 132 is restrained with respect to the load receiving base end portion 131. Is done. When the pin 141d is restrained by the hook 150, the load receiving base main body 132 is fixed in the retracted posture, and when the pin 141e is restrained, the cargo receiving main body 132 is fixed in the deployed posture. When the posture of the load receiving table main body 132 is shifted, the hook 150 is lifted to release the pin 141d or 141e.

  Next, operations and effects of the load receiving table lifting / lowering apparatus 100C having the above-described configuration will be described.

  When starting to use the load receiving platform lifting / lowering device 100C, the lever 153 is moved forward to release the restraint of the load receiving block main body 132 and the handle 139 is grasped to hold the load receiving main body 132 (FIG. 23) in the rearward position. Pull out. When the load receiving base body 132 comes to a position subsequent to the load receiving base 131, the lever 153 is pulled backward to fix the load receiving base 132 to the load receiving base 131 in the deployed posture. When storing the load receiving table 130, the reverse procedure is performed when the load receiving table base end portion 131 is at the load floor height, the door 105 of the load chamber 103 is closed, and the entire load receiving device lifting / lowering device 100C is loaded. Housed in chamber 103.

  When carrying out the cargo handling work, if a predetermined operation is performed with an operating device (not shown) after the loading platform 130 is unfolded, the lift driving device 120 provided in the link mechanism 110 contracts, and the loading platform 130 is lowered from the height of the loading floor 108 to the ground. (See FIG. 24). In order to raise the load receiving table 130, the lift driving device 120 is extended by performing a predetermined operation on the operation unit. At this time, the horizontal linking mechanism of the linking mechanism 110 causes the load receiving table 130 to move up and down between the height of the load floor 108 and the height of the ground while maintaining a substantially horizontal posture.

  As described above, in the present embodiment, the load receiving base 130 is divided into the front and the rear, and the load receiving base main body portion 132 is stored in the lower part of the first half of the load receiving base base end portion 131. Thus, as in the first embodiment, At the time of storage, only the load receiving table base end portion 131 forms a part of the floor surface of the load chamber 103. Therefore, it is possible to ensure good continuity between the vehicle floor 108 and the load receiving table 130. In addition, the space in which the load receiving body main body 132 is accommodated becomes empty at the time of deployment, and the load receiving stand 130 can pass through this space. With this configuration, the front and rear dimensions of the load receiving platform lifting / lowering apparatus 100C are extremely advantageous in accommodating the dimensions within the rear overhang of a comparatively small vehicle, for example, a medium size or smaller. Therefore, it is not necessary to raise the floor surface of the luggage compartment 103 in consideration of the amount of lifting of the axle of the rear wheel of the vehicle, which is advantageous in securing the capacity of the luggage compartment 103. In addition, since the load receiving base end portion 131 is a part of the floor surface of the loading chamber 103 during storage, it is not disturbed when not in use and may hinder cargo handling work that does not use the load receiving lift 100C. Absent.

  Further, if the opening / closing door 105 of the luggage compartment 103 is closed in the retracted posture, the load receiving platform lifting / lowering device 100C is covered with the wall surface of the luggage compartment 103 and the opening / closing door 105, so that it collides with dirt and obstacles outside the vehicle. It is protected from maintenance and labor required for maintenance is reduced. Furthermore, when handling a light load without using the load receiving table lifting / lowering device 100C, the cargo handling work can be performed by opening only one of the left and right open / close doors 105, so that the work efficiency is good.

  In addition, in the present embodiment, by providing the lock device 138, the load receiving base end portion 131 and the load receiving base body 132 can be more fully fixed. Further, the locking device 138 restrains the pin 141d when the cargo receiving body main body 132 is in the retracted position, and restrains the pin 141e when in the deployed position. That is, since the single locking device 138 serves as both the locking device for the storage posture and the locking device for the deployment posture, the number of parts can be reduced compared to the case where the locking device for the storage posture and the deployment posture are provided separately. Manufacturing cost. In order to simply fix the load receiving base body 132 with respect to the load receiving base end portion 131, the load receiving base main body portion with respect to the load receiving base end portion 131 in a posture accommodated in the lower portion of the load receiving base end portion 131. The first lock device for fixing 132 and the second lock device for fixing the load receiving base main body portion 132 to the load receiving base end portion 131 in a posture developed on the rear side of the load receiving base end portion 131 are separately provided. It can also be set as the structure provided.

  Furthermore, the cover 109 that supports the load receiving platform lifting / lowering device 100C is configured as shown in FIG. 27, and the vertical surfaces 109c and 109d of the upper horizontal surface 109a to which the base bracket 111 of the link mechanism 110 is fixed are used as the side walls of the cargo compartment 103 of the vehicle. It is fixed to. That is, at the time of loading / unloading of the load, due to the load weight of the load receiving table lifting / lowering device 100C and the load receiving stand 130, a moment having an axis in the vehicle width direction with the base portion of the link mechanism 110 as an origin is generated. A vertical force (see arrows in FIG. 27) is applied before and after the mounting portion of the bracket 111, but a connecting portion (this example) with the side wall of the luggage compartment 108 around the axis (in this example, before and after the base bracket 111). Then, by providing the vertical surfaces 109c and 109d), the above force can be efficiently supported by the side wall of the cargo compartment 103. In this example, both the upper and lower vertical surfaces 109c and 109d are connected to the side wall of the luggage compartment 103. However, if either is sufficient, only one of them may be connected.

  In this example, the upper and lower horizontal surfaces 109a and 109b are not connected to the side wall of the cargo chamber 103. However, in order to more firmly fix the cover 109, the cargo chamber is similar to the upper and lower vertical surfaces 109c and 109d. Brackets may be attached to the left and right side walls of 103, and the upper and lower horizontal surfaces 109a and 109b may be fixed to the brackets with bolts, nuts, or the like.

  36 to 41 are perspective views of a load receiving table lifting apparatus according to a sixth embodiment of the present invention. 36, FIG. 38, and FIG. 40 represent the overall views of the deployed posture, the intermediate posture, and the retracted posture, respectively, and FIGS. 37, 39, and 41 represent enlarged views of the main part of the present embodiment in each posture. ing. 36 to 41 show a state in which the front side cover of the front end side arm 114 on the front side of the link mechanism 110 is removed.

  In the present embodiment, similarly to the third embodiment, the load receiving base main body 132D is pivotally connected to the rear end of the load receiving base end portion 131D and folded to the lower portion of the load receiving base end portion 131D. Although it is an example, especially the stopper structure which hold | maintains the expansion | deployment attitude | position of the receiving stand 130D differs from 3rd Embodiment.

  The load receiving platform lifting / lowering device 100D according to the present embodiment includes a load receiving base base end portion 131D, a load receiving base main body portion 132D, a front side portion of the load receiving base base end portion 131D, and a front end portion of the front end side arm 114 of the link mechanism 110. A shaft (first shaft) 170 that is rotatably connected, a double hinge 171 that connects opposite ends of the load receiving base end portion 131D and the load receiving base main body portion 132D, and the front end side arm 114 of the link mechanism 110 and the load receiving portion. A guide arm 175 having both ends rotatably connected to the rear side portion of the base body portion 132D via pins 172 and 173 is provided.

  The guide arm 175 includes a rod portion 175a connected to the distal arm 114 of the link mechanism 110 via a pin 172, a bracket portion 175b connected to a rear side portion of the load receiving base body portion 132D via a pin 173, The rod part 175a and the bracket part 175b are provided with the pin 174 which connects so that rotation is possible.

  In addition, the lower limit of the rotation range of the load receiving base end portion 131D that is rotatably connected to the distal end arm 114 of the link mechanism 110 via the shaft 170 is restricted, and the load receiving at the time of deployment or storage is performed. For the purpose of maintaining the horizontal posture of the base end portion 131D, a stopper bolt 176 is fixed at a position above and ahead of the shaft 170 of the distal arm 114. The stopper bolt 176 can be moved back and forth in the vertical direction with respect to the block 176a fixed to the distal arm 114. At this time, in the present embodiment, the shaft 170 is fixed to the distal end side arm 114. Then, the bracket 177, which is the counterpart member of the stopper bolt 176, rotates and slides with respect to the shaft 170 so as to be positioned between the left and right covers constituting the distal arm 114. The bracket 177 is connected to the load receiving base end portion 131D via the shaft 170, rotates together with the load receiving base end portion 131D, and the load receiving base base end portion 131D is in a horizontal posture during deployment and storage. When it is in contact with the lower surface of the stopper bolt 176. Thus, the lower limit of the rotation range of the load receiving base end portion 131D is limited, and consideration is given to prevent the load receiving base base end portion 131D from tilting in the downward direction even when an external force is applied.

  Further, the double hinge 171 is connected to the opposite ends of the load receiving base end portion 131D and the load receiving stand main body portion 132D so as to be rotatable at both ends. With such a double joint structure, the load receiving stand main body portion 132D is It is configured to be able to shift from a deployed posture to a retracted posture folded 180 degrees below the load receiving base end portion 131D. The rotation fulcrums at both ends of the double hinge 171 correspond to the second axis of the third embodiment. At this time, a stopper 178 is provided at the front of the load receiving body main part 132D so as to protrude forward (forward when unfolding). When the load receiving body main part 132D shifts to the deployed position, the stopper 178 Abuts on the upper surface of the load receiving base end portion 131D. Thereby, it is considered that the connecting portion between the load receiving base end portion 131D and the load receiving block main body portion 132D is not bent in a downwardly convex state at the time of deployment.

  With the above configuration, when the load receiving table 130D shifts from the unfolded position (FIGS. 36 and 37) to the retracted position (FIGS. 40 and 41), the load receiving table 130D receives the load as shown in the intermediate position shown in FIGS. The connecting portion of the base end portion 131D and the load receiving base main body portion 132D is lifted, the load receiving base main body portion 132D is reversed to the posture with the receiving surface facing downward, and is folded and stored in the lower portion of the load receiving base base end portion 131D. (FIGS. 40 and 41). At this time, the distance between the pins 172 and 173 at both ends of the guide arm 175 varies depending on the deployed posture and the retracted posture. Is absorbed.

  The bracket 177 is biased upward from the distal arm 114 by a spring 179 at a portion rearward of the shaft 170. When the bracket 177 shifts from the deployed position to the retracted position, the restoring force of the spring 179 receives the load. In addition to the force that raises the base end portion 131D, the load receiving base 130D is assisted in shifting from the deployed posture to the intermediate posture. Further, when shifting from the intermediate posture to the retracted posture, the spring 179 resists the falling operation of the load receiving base end portion 131D, and this acts as a damper. The same applies to the transition from the retracted posture to the deployed posture.

  Also in this embodiment, basically the same effect as that of the third embodiment can be obtained.

  In the present embodiment, the bracket 177 is provided exclusively on the load receiving base end portion 131D as a mating member that contacts the stopper bolt 176, but the stopper bolt 176 contacts the part of the load receiving base end portion 131D. It is good also as a structure which touches.

  The components described in the above embodiments can be arbitrarily selected and arbitrarily combined.

DESCRIPTION OF SYMBOLS 1 Car frame 3 Loading room 8 Loading floor 10 Link mechanism 20 Lift drive device 30,30A, B Load receiving base 31,31A, B Load receiving base end part 32,32A, B Load receiving base main-body part 33 Concave part 34 Convex part 40 Rotor unit 41 Guide plate (guide means)
42 Slit 43 Linear part 44 Arc part 45 Bearing (rolling part)
46 shaft 47 gear (first driven part)
48 Rack gear (second driven part)
50 Drive motor 51 Gear 52 Chain (drive transmission part)
60 Concavity 62 Convex 70, 170 First shaft 71 Second shaft 75, 175 Guide arm 76, 176 Stopper 80 Bracket 81, 82 Pin 83 Guide arm 100, 100A-D Loading platform lifting device 101 Car frame 103 Cargo compartment 108 Load bed 109 Cover 110 Link mechanism 120 Lift drive device 130, 130D Load receiving base 131, 131D Load receiving base end portion 132, 132D Load receiving main body 138 Lock device 140 Rotor unit 141c Guide plate (guide means)
142 Slit 143 Straight part 144 Arc part 146 Shaft 147 Gear 148 Rack gear

Claims (16)

In a load receiving platform lifting device that supports loading and unloading of luggage with respect to the luggage compartment at the rear of the vehicle,
Link mechanisms provided on the left and right sides of the cargo compartment;
A load receiving base base end portion connected to the distal end portion of the link mechanism, and a load receiving surface constituting a part of the floor surface of the cargo compartment when rising;
A storage space below the load receiving base end that is connected to the front end of the load receiving base at the time of deployment so that the load receiving base and the load receiving surface are continuous, and is at the height of the load floor during storage. A receiving cradle body stored in
A load receiving device lifting device connected to the link mechanism, and comprising a lift driving device that lifts and lowers the load receiving device base end together with the load receiving device main body.   2. The load receiving platform lifting apparatus according to claim 1, wherein a part of the storage space is partially shared with a passing space when the deployed load receiving platform is lifted and lowered. In the load receiving table lifting device according to claim 1 or 2,
When the loading cradle base end side of the deployed cradle is in the depth direction one side and the cradle body part side is the other side in the depth direction,
A guided member provided on the other side in the depth direction of the load receiving base base end;
A guide means provided on the main body of the load receiving base and having a slit for guiding the guided member;
The slit has a linear portion extending in the depth direction of the load receiving table, and an arc portion that folds downward from one end portion in the depth direction of the linear portion,
The load receiving base lifting device, wherein the guided member moves relatively in the slit so that the load receiving body main body slides from the storage position to the other side in the depth direction and then moves up to the unfolded position. . The load receiving table lifting device according to claim 3,
The guide means is provided on both sides in the width direction of the load receiving table main body,
The load receiving platform elevating device, wherein the guided member includes a rolling portion that rolls to the slits of both guiding means, and a shaft that connects both rolling portions. The load receiving table lifting device according to claim 4,
A drive motor;
A first driven part attached to the shaft;
Drive transmission means for transmitting the driving force of the drive motor to the first driven portion;
A second driven part that is provided along the slit and that is driven by the driven part to convert the rotational operation of the driven part into the operation of the main body part along the slit; A cargo receiving platform lifting device. The load receiving table lifting device according to claim 3,
A first locking device that fixes the load receiving base body to the load receiving base end in a posture accommodated in a lower part of the load receiving base base;
Lifting and lowering the load receiving base characterized by comprising a second locking device that fixes the load receiving base main body to the load receiving base proximal end in a posture developed on the other side in the depth direction of the load receiving base base. apparatus.   7. The load receiving table lifting apparatus according to claim 6, wherein the first locking device and the second locking device are shared. In the load receiving platform lifting apparatus according to claim 1 or 2,
When the load receiving base base end side of the deployed load receiving base is the one side in the depth direction, and the load receiving base main body side is the other side in the depth direction,
A first shaft that rotatably connects the one-side portion in the depth direction of the load receiving base end portion and the distal end portion of the link mechanism;
A second shaft that rotatably connects the other side portion in the depth direction of the base portion of the load receiver and the one side portion in the depth direction of the main body portion of the load receiver;
A guide arm having one end pivotably connected to the link mechanism and the other end pivotally connected to the other side portion in the depth direction of the cargo cradle body.
The load receiving base raises the receiving end base end of the load receiving base and the connecting portion of the main body of the load receiving base at the time of storage, and then reverses the load receiving base main body portion to a posture in which the load receiving surface faces downward. A cargo receiving platform lifting device, wherein the device is folded and stored at a lower portion of an end portion.   9. The load receiving platform lifting apparatus according to claim 8, wherein the link mechanism includes a stopper that holds the load receiving base base end portion in a horizontal posture.   The load receiving base lifting device according to claim 9, wherein the stopper is positioned below the first shaft of the link mechanism, and the load receiving base base end portion is in a horizontal posture when the load receiving base base end portion is in a horizontal posture. A load receiving platform lifting device characterized by receiving a bottom surface.   The load receiving base lifting device according to claim 9, wherein the stopper is positioned above the first shaft of the link mechanism, and the load receiving base base end portion or the load receiving base base end portion is in a horizontal posture. A load receiving table elevating device which is in contact with an upper surface of a member which rotates integrally therewith.   The load receiving base lifting apparatus according to any one of claims 8 to 11, wherein the second shaft is disposed so as to be positioned below a bottom surface of the load receiving base when the load receiving base is deployed. Cargo stand lifting device. In the load receiving platform lifting apparatus according to claim 1 or 2,
When the load receiving base base end side of the deployed load receiving base is the one side in the depth direction, and the load receiving base main body side is the other side in the depth direction,
First engaging means provided on the other side in the depth direction of the load receiving base end portion;
Second engagement means that is provided on one side in the depth direction of the load receiving body main body and engages with the first engagement means during deployment;
A pin provided on the other side in the depth direction of the main body of the cargo receiver,
A guide arm for connecting the pin and the link mechanism;
When the load receiver main body moves to the retracted position, the first and second engaging means are disengaged and only the rear portion is restrained by the guide arm. A cargo receiving platform lifting device, wherein the device is pushed into the vehicle.   14. The load receiving device lifting apparatus according to claim 1, further comprising restraining means for restricting a vertical movement of the load receiving body main body portion with respect to the load receiving stand base end portion when in the unfolded position. Cargo stand lifting device.   15. The load receiving platform lifting apparatus according to claim 14, wherein the restraining means restrains the movement of the load receiving stand main body portion in the depth direction with respect to the load receiving stand base end portion at the unfolded position. Loading platform lifting device. The load receiving table lifting device according to any one of claims 1 to 15,
A cover provided on the base of the luggage compartment, with a base portion of the link mechanism attached to the top;
The load receiving platform lifting apparatus, wherein the cover is fixed to at least one of the front and rear sides of the base of the link mechanism with respect to the side wall of the cargo compartment.

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