JPH10298U - Load lifting equipment - Google Patents

Abstract

(57) [Summary] [Purpose] While having a large lift table capable of lifting and lowering large heavy loads, it can be mounted on a small car body with a short ROH. Loads can be put in and out, making operation easy. [Structure] A column 52 disposed on both sides of a rear end of a luggage compartment,
Support members 60 and 61 provided on the chassis frame 58
A first arm member 53 and a second arm member 54, each of which is rotatably provided at one end side of the support 52 and at the other end side of the support member 61 at a predetermined center distance.
, A connecting member 55 for connecting the lower sides of both columns, and a slit 5 at the position of the chassis frame 58.
And a lift table 57 having a portion 7a and moving back and forth on the connecting member 55.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention relates to a cargo lifting / lowering device provided at the rear of a cargo bed of a truck for collecting and delivering cargo.

[0002]

[Background technology]

 In recent years, a major logistics company has established a system in which moving luggage is stored and transported in a special box with a caster foil attached to the bottom of a box or basket with a width of about 1100 mm × length 1100 mm × height 1900 mm. , Is being rolled out nationwide. In addition, the same logistics company has established and operates a home delivery system on a nationwide network.

[0003] However, a home delivery car delivers small loads to individual homes, so it must be a small car with a short overall length so that it can enter even on narrow roads. On the other hand, moving vehicles require large lifting equipment (table lifters) in order to load and unload the above-mentioned dedicated boxes, and are large vehicles with a long overall vehicle length.

[0004] It is impossible to provide the former small home delivery vehicle with a large elevating device because the function of the home delivery vehicle is impaired. In the latter case, if the parcels are taken in and out of the rear door without using the rear elevator, the elevator is jammed, which is inconvenient. In addition, in recent years with severe traffic congestion and strict parking regulations, the turnability is poor, and speedy collection and delivery processing is required for home delivery, which is completely inappropriate and unusable. In other words, load lifting equipment is used when lifting heavy loads from the ground to the loading platform, so it is indispensable for moving vehicles that carry large heavy loads, but home delivery vehicles that collect and deliver small loads. There was no need.

[0005] However, since the vehicles are different, the garage, the sales office, and the driver are different, and the same company operates different vehicles independently in the same area, thereby contributing to traffic congestion. That is the current situation.

[0006]

[Problems to be solved by the invention]

 Examples of the cargo lifting / lowering devices used in the above-mentioned moving-only vehicles include those of the A to G type as shown in FIGS. Note that the same functional components will be described with the same reference numerals.

In the case of the A, B, and E types (FIGS. 9, 10, and 13), the lift table 103 is moved up and down by the parallel link 104 and the elevating column 105. The lift table 103 is flipped up behind or in front of the rear door 102 of the room 101. This lift table 103 has a drawback in that luggage in the luggage compartment 101 cannot be taken in and out unless it is operated and leveled.

In the case of the C type (FIG. 11), since the lift table 103 is retracted and stored under the floor by the parallel link 104 during traveling, when the length L of the lift table 103 is increased, There is a disadvantage that the dimension ROH (rear overhang) up to the rearmost portion of the vehicle body becomes longer and the overall length of the vehicle body becomes longer. The same is true for the D type (FIG. 12) in which the floor of the ROH part moves up and down.

In the case of the F type (FIG. 14), since the lift table 103 is folded and stored under the floor during traveling, the storage operation is complicated. In particular, when the lift table 103 is large, the weight becomes heavy, which is dangerous and difficult to handle.

In the case of the G type (FIG. 15), this is a modification of the A type, in which the lift table 103 is tilted vertically below the rear door 102 and stored. If the lift table 103 is made large, the ground height H at the tip of the lift table 103 becomes insufficient during traveling, so that there is a disadvantage that the lift table 103 cannot be too large.

[0011] The purpose of the present invention is to have a large lift table capable of lifting and lowering a large heavy load, attach it to a small vehicle body with a short ROH, and open the rear door without raising or lowering operation. It is an object of the present invention to provide a loading / unloading device capable of loading / unloading and easy operation.

[0012]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, a cargo lifting / lowering device according to the present invention includes a support arranged on both sides of a rear end of a cargo room, a support member provided on a chassis frame, and an end on one end of the support. The other end of the support member is rotatably provided at a predetermined inter-axis distance, and one or more sets of first and second arm members constituting a parallel link mechanism, and the support or the first or second arm member. A drive means for driving the second arm member, a connecting member for connecting the lower sides of the two columns, and a lift table having a slit at a portion corresponding to the chassis frame or the vertical joist and sliding forward and backward on the connecting member. This is a configuration that includes

[0013] In this case, the first and second arm members may be configured such that a distance between the axes on the support member side is shorter than a distance between the axes on the support column side, and when the support column rises, the first and second arm members are substantially vertical. When it descends, it can be characterized by inclining backward. Further, a rolling member rotatably provided on the connecting member and in rolling contact with the lift table is provided. Further, a suspending member for suspending the back of the lift table from the support column may be provided. At this time, the length of the hanging member can be adjusted.

[0014]

[Action]

 According to the present invention, pillars are provided on both sides of the rear end of the luggage compartment, and the pillars are moved up and down by a parallel link mechanism comprising a support member and first and second arm members. Since a certain lift table is inserted so that it can slide back and forth, it can be retracted and stored while avoiding the chassis frame or vertical joist under the floor of the vehicle. Therefore, it can be attached to a conventional vehicle without any improvement. In addition, the swinging motion of the first and second arm members causes the support column to move up and down while maintaining a substantially vertical position outside the gate post, so that at the ascending position (top dead center), the front end of the lift table has a gap at the rear end of the bed floor. It stops without any contact, so that loading and unloading can be done smoothly.

[0015] Further, the rolling table allows the lift table to be in rolling contact with the connecting member, so that the lift table can be easily taken in and out. Furthermore, since the suspension member is provided, the lift table can be kept substantially horizontal when pulled out. At this time, if the length of the suspension member can be adjusted, the lift table can be raised or lowered.

On the other hand, since the arm members that protrude rearward and support the lift table are provided on both sides of the connecting member, the lift table can be easily and reliably supported without using hanging members on both sides of the lift table. be able to.

[0017]

【Example】

 Next, the present invention will be described in more detail by way of examples. 1 to 3 are views showing an embodiment of a cargo lifting device according to the present invention, wherein FIG. 1 is a perspective view, FIG. 2 is a side view, and FIG. 3 is a rear view. As shown in FIGS. 1 to 3, the automobile 1 is a vehicle having a vehicle weight of about 3 t used for home delivery or the like. For example, a vehicle having a total length of 4925 mm, a total width of 1730 mm, and a total height of 3110 mm is preferably used. Can be In this automobile 1, gate posts 51 are arranged on both sides of the rear surface of the vehicle body 2, and the rear posts 3 are provided on the gate posts 51 via hinges 51b.

In the lower part of the rear surface of each of the portal posts 51, an opening 51a which is elongated vertically is formed. The left and right pillars 52 are provided corresponding to the respective gate columns 51, and are translated in the vertical direction by the upper arm 53 and the lower arm 54, and when the upper dead point is reached, each of the gate columns 51 is passed through the opening 51a. 51. The left and right columns 52 are connected by a cylindrical connection bar 55 arranged in the horizontal direction via a bracket 52c provided at the lower end of the rear surface.

The lift table 57 is for placing a load and moving up and down, and is inserted on the connecting bar 55 so as to be able to be pulled out. The lift table 57 is formed with two slits 57b for biting the web portion of the vertical joist 1c. The chain 56 is for suspending the lift table 57, and has a lower end fixed to an anchor 57 a of the lift table 57. The upper end of the chain 56 is hooked on a T-shaped hole 52d formed on the upper rear surface of the column 52. The length of the chain 56 can be adjusted by hooking the link near the upper end in the T-shaped hole 52d by one pitch at a time, whereby the inclination angle of the lift table 57 can be set. Can be. Therefore, the lift table 57 can be adjusted upward or downward. For example, even when there is a step between the loading platform and the platform, the lift table 57 can be used as a crossing plate.

The support bar 60 is horizontally fixed to a chassis frame 58 of the automobile 1 via a bracket 59. On both left and right ends of the support bar 60, brackets 61A and 61B made of two plates are fixed vertically. The bracket 61 (61A, 61B), the support 52, the upper arm 53, and the lower arm 54 constitute a parallel link mechanism. That is, one end of the upper arm 53 is rotatably attached to the support 52 via the pin 52a, and one end of the lower arm 54 is rotatably attached to the support 52 via the pin 52b. The upper arm 53 has the other end rotatably supported by the pins 61a in the brackets 61A and 61B. The lower arm 54 is rotatable about the support bar 60 in the brackets 61A and 61B. Supported.

The lift cylinder 62 is for driving the parallel link mechanism. The upper end is rotatably supported in the brackets 61A and 61B by a pin 62a, and the lower end is a lower arm 54 by a pin 62b. Is rotatably supported at the other end. Therefore, by extending and retracting the lift cylinder 62, the support column 52 is translated while keeping it substantially vertical, and the lift table 57 is moved through the connecting bar 55 so that the lift table 57 is moved to the table position (A) shown in FIG. Move up and down between C).

The connection bar 55 connects the left and right columns 51 at the lower ends and supports the front end of the lift table 57. In this embodiment, a cylindrical member (round pipe) is used. I have. The connecting bar 55 is provided with a collar 55a rotatably mounted on the outer periphery thereof, and the lift table 57 is in rolling contact with the collar 55a, so that it can be smoothly put in and out.

FIG. 4 to FIG. 6 are views showing a lock mechanism used in the load lifting device according to the embodiment. The lock mechanism 63 is provided below the lift table 57, and is connected to a lever 64 rotatably provided on the lift table 57, and one end of which is pivotally supported by the lever 64 to transmit the driving force of the lever 64. A rod 65, a lock claw 66 to which the other end of the connection rod 65 is connected and rotatably attached to the lift table 57; a spring 67 for urging the lock claw 66 counterclockwise in FIG. A lock receiving plate 68 provided on the 55 side and engaged with a lock claw 66 is provided.

The lock mechanism 63 rotates the lever 64 in the direction of the arrow, pulls out the lift table 57 with the lock claw 66 retracted, and releases the lever 64 at the pulled-out position, thereby attaching the spring 67. The lock pawl 66 rotates counterclockwise in FIG. 5 by the force and engages with the lock receiving plate 68 to lock the lift table 57 to the connecting bar 55.

Next, the operation of the load lifting device according to this embodiment will be described. When using the elevating device of this embodiment, first, the rear door 3 of the vehicle 1 is opened by about 260 ° around a hinge 51b provided at an outer corner behind the pillar 51 so as to be fully opened. Next, at the table position (B) in FIG. 2 or 3, the lock mechanism 63 (see FIG. 4) stored below the lift table 57 is removed, and the lift table 57 is pulled out to the rear of the vehicle body 2.

When the lift table 57 is pulled out to the maximum, the front end of the lift table 57 rests on the support bar 60 and does not protrude forward from the rear surface of the column 52. At this time, it is automatically locked by the lock mechanism 63 and does not return. In this state, the upper end of the chain 56 is inserted into the T-shaped hole 52d of the column 52, and the rear part of the lift table 57 is lifted and supported.

Next, the lift cylinder 62 is extended, and the upper dead center (the left side in FIG. 3) of the movement area of the upper arm 53 and the lower arm 54, that is, the lift table 57 is moved to the table position (A). At this position, as shown in FIG. 2, the lift table 57 is at the same position as the floor plate 1a.

Subsequently, the load in the vehicle body 2 is placed on the lift table 57, and the lift cylinder 62 is contracted. When the lift cylinder 62 is contracted, the columns 52 supported by the upper arm 53 and the lower arm 54 are lowered while maintaining parallelism (parallel link mechanism), and reach the table position (C). During this movement, the columns 52 are kept vertical, so that the lift table 57 is kept horizontal and the cargo does not slip and fall.

Conversely, when loading a load, the load is placed on the lift table 57, moved from the table position (C) to the table position (A), and the load is loaded into the vehicle body 2. Can be.

Next, when storing the lift table 57, the lift cylinder 57 is moved to the table position (B) by the lift cylinder 62, the lock mechanism 63 is unlocked, and the lift table 57 is moved to the table position shown in FIG. Push forward to (B '). The lock mechanism 63 is operated and fixed at a position where the lift table 57 does not protrude backward from the support bar 60, and the storage of the lift device is completed. At this time, since the inserted lift table 57 has the slit 57b, it can be stored without interfering with the chassis frame 1b or the vertical joist 1c of the automobile 1.

Since the lift table 57 can be stored in front of the floor under the tire 1d of the automobile 1, the lift table 57 can be made sufficiently long as necessary. Even in that case, the lift table 57 has a front end supported by the support bar 60 and a rear portion supported by the chain 56. Therefore, the strength of the lift table 57 is limited to the case of a cantilever support such as another type of lifting device. Compared with, it is sufficiently strong and can achieve weight reduction.

FIG. 7 is a perspective view partially showing a second embodiment of the cargo lifting apparatus according to the present invention. Note that parts that perform the same functions as in the first embodiment described above are denoted by the same reference numerals, and redundant description will be omitted.

In the first embodiment, the lift table 57 has been described as being supported substantially horizontally. However, when the load is a box with caster wheels or the like, the lift table 57 must be lowered backward at the time of landing. Is preferred. However, when the lift table 57 is lowered backward, the caster wheel-equipped box may roll down when ascending and descending. Therefore, in the second embodiment, the box with caster wheels is structured so that it can be moved up and down safely and easily.

In the lifting device according to the second embodiment, the lift table 57 is provided with the road plate 68 and the caster stopper 69. The road plate 68 and the caster stopper 69 are provided on the lift table 57 so as to be rotatable around shafts 68b and 69b, respectively. Slits 68 a and 69 a are formed in the road plate 68 and the caster stopper 69 at positions corresponding to the slits 57 a of the lift table 57. The caster stopper 69 is urged by a spring 70 via a lever 71 in a rising direction (the state shown in FIG. 7). When the lift table 57 is stored, the road plate 68 is lifted up and placed on the lift table 57 in an inverted manner, so that the caster stopper 69 is pressed by the weight of the road plate 68, and the upper surface of the lift table 57 and the road plate 68.

By adjusting the length of the chain 56, at the time of landing (at the bottom dead center of the upper arm 53 and the lower arm 54), the upper surface of the lift table 57 is lowered rearward, and the rear end of the road plate 68 is easily formed. Land on. The road plate 68 hits the abutment (stopper) 57c of the lift table 57 and stops at a rearward downward angle. When loading the box with caster wheels containing the load, the caster wheels that have passed over the road plate 68 are pushed over the caster stoppers 69 onto the lift table 57, and after the caster wheels are passed over, the caster stoppers 69 are moved by the springs 70. The caster wheels are prevented from rolling up due to the rising and falling slopes behind the lift table 57.

FIG. 8 is a schematic view partially showing a third embodiment of the cargo lifting apparatus according to the present invention. In the first and second embodiments, the position of the pin 61a serving as the axis of the upper arm 53 or the lower arm 54 is A, the position of the support lever 60 is B, the position of the pin 52a is C, and the position of the pin 52b is If D, straight line AB = straight line CD = straight line C'D ', and straight line AB, straight line CD and straight line C'D' are substantially parallel. Accordingly, when the lift table 57 is moved up and down the caster wheel box, if it is lowered rearward at the time of landing, the lift table 57 will be lowered rearward even in the state of the table position (A).

In the third embodiment, the straight line AB is slightly shortened like the straight line A′B. That is, the position of the pin 61a of the upper arm 53 is slightly shifted downward and attached. Therefore, the straight line A'B and the straight line CD are substantially parallel, but the straight line A'B and the straight line C "D" are not parallel, and the point C "is shifted behind the point C '. Therefore, even if the straight lines A'B and CD are parallel to the gate post 51, the straight line C "D 'is not parallel at the lower end, and the upper part of the gate post 51 falls backward. The rear end lands at the same time as the connecting bar 52.

As described above, in the third embodiment, at the table position (A), the lift table 57 is parallel to the floor plate 1a, and at the table position (C), the upper surface of the lift table 57 is lowered backward. The rear end lands easily.

FIGS. 16 to 18 are views showing a fourth embodiment of the cargo lifting device according to the present invention, wherein FIG. 16 is a top view, FIG. 17 is a rear view, and FIG. 18 is a side view. . In the first embodiment, the rear end of the lift table 57 is suspended by the chain 56. In the fourth embodiment, as shown in FIG. 16, an L-shaped bracket 80 is attached to the support post 52. A connecting bar 55 is provided, and a roller 82 is further rotatably attached to the rear end side. A grip 82 is provided at the front end of the lift table 57, and the connection bar 55 is hooked by the grip 82. According to the fourth embodiment, the attachment / detachment of the chain 56 is not required, and the side surface of the lift table 57 is opened.

FIG. 19 is a perspective view partially showing a fifth embodiment of the cargo lifting apparatus according to the present invention. In the fifth embodiment, a U-shaped cross section rail 84 is attached to a bracket 52c provided at the lower end of the left and right columns 52 by a pin 85 so as to be rotatable in a horizontal plane. When the lift table 57 is stored under the floor plate 1a, the rail 84 is rotated so as to be parallel to the connection bar 55 as shown in the left half of FIG. I'm trying to fit. When the lift table 57 is pulled out, as shown in the right half of FIG. 19, the rail 84 is rotated so as to be substantially perpendicular to the connecting bar 55, and the outermost bone of the lift table 57 is placed inside the rail 84. Insert the portion 57c and pull it out so that the rail 84 serves as a guide. Accordingly, since the lift table 57 is sandwiched between the rails 84, it does not shift in the left-right direction.

According to the fifth embodiment, since the outermost bones 57 c installed on the left and right sides of the lift table 57 are supported by the rails 84, they are not easily bent. Therefore, the lift table 57 is supported by the connecting bar 55 at the front end and by the lateral bone 57d of the lift table 57 at the rear end, and both ends are supported, which is advantageous in strength. When the lift table 57 is used, the lift table 57 can be pulled out only by opening the rail 84 approximately 90 degrees to the left and right, so that the weight of the lift table 57 is applied to the rail 84 and it is necessary to pull out the lift table 57 while lifting it. Disappears. Furthermore, when the lift table 57 and the rails 84 are stored (see the state of the left half of FIG. 19), the rails 84 serve as steps, so that workers can easily enter and exit the loading platform. In the fifth embodiment, the grip 82 as shown in the fourth embodiment is unnecessary because the front end of the lift table 57 does not float from the connecting bar 55 regardless of the position of the load.

FIG. 20 is a side view partially showing a sixth embodiment of the cargo lifting apparatus according to the present invention. In the sixth embodiment, a ball caster 86 is provided at the rear end of the side surface of the lift table 57. A guide 87 and a guide groove 88 are provided inside the rail 84 to guide left and right and up and down. At the same time, the ball caster 86 falls into the guide groove 88 at the maximum extension position of the lift table 57. Automatically locked. Therefore, the lock mechanism (see FIG. 6) for pulling out the lift table 57 can be omitted. According to such a locking means, even if the rear end of the lift table 57 lands first and then the rail 84 lands, the lift table 57 escapes without exerting an excessive force. Note that a roller may be used instead of the ball caster 86.

By using the above-described cargo lifting device, a moving truck with a lifting device that is currently widely used in Japan and a small-sized home delivery vehicle that is very often used exclusively for parcel collection and delivery are also available. And can also be used. That is, if a small parcel delivery vehicle is equipped with the elevating device of the present invention, the small parcel delivery car will be able to collect moving parcels in the service area. Therefore, the provision of the cargo lifting device according to the present invention in small-sized home delivery vehicles, and the fact that the home delivery vehicles can partially take over the moving field, means that the current transportation industry is suffering from a serious labor shortage and worsening traffic conditions. The economic effects on the country are immense.

Further, the lifting device according to the present invention is fixed only to the chassis frame, and the entire lifting device is configured separately from the vehicle body, so that the lifting device is mounted in a chassis state, and In, the body can be mounted. Therefore, as long as the space for accommodating the columns is secured, the lifting device of the present invention can be installed regardless of the shape of the body (for example, fire truck, tank truck, mixer truck, etc.).

[0045]

[Effect of the invention]

 As described in detail above, according to the present invention, the two supporting columns are connected by the connecting member so that the lift table with the slit can be slid forward and backward, so that the chassis frame or the vertical joist under the floor of the vehicle is avoided. And can be retracted and stored. Therefore, it can be attached to a conventional vehicle without any improvement.

Further, the column is raised and lowered by a parallel link mechanism including a support member and first and second arm members, and the column is substantially vertically outside the gate column by the swing operation of the first and second arm members. As the ascent and descent are performed while maintaining the height, the front end of the lift table comes into contact with the rear end of the cargo bed floor without any gap at the ascending position (top dead center) and stops, so that loading and unloading can be performed smoothly.

Further, the rolling table allows the lift table to come into rolling contact with the connecting member, so that the lift table can be easily taken in and out.

Further, since the suspension member is provided, the lift table can be kept substantially horizontal when pulled out. At this time, if the length of the suspension member can be adjusted, the lift table can be raised backward or lowered backward.

On the other hand, since the arm members that protrude rearward and support the lift table are provided on both sides of the connecting member, the arm members can be supported from the lower side or the lateral side. The side is opened and the strength is also advantageous. In addition, since the arm member serves as a guide, there are effects such as easy access to the lift table.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a cargo lifting device according to the present invention;

FIG. 2 is a side view showing the elevating device according to the first embodiment.

FIG. 3 is a rear view showing the lifting device according to the first embodiment.

FIG. 4 is a view showing a lock mechanism used in the lifting device according to the first embodiment.

FIG. 5 is a view partially showing the lock mechanism shown in FIG. 4;

FIG. 6 is a view partially showing the lock mechanism shown in FIG. 4;

FIG. 7 is a perspective view partially showing a second embodiment of the cargo lifting device according to the present invention;

FIG. 8 is a schematic view partially showing a third embodiment of the load lifting device according to the present invention;

FIG. 9 is a diagram showing a conventional example (A type) of a cargo lifting device.

FIG. 10 is a view showing a conventional example (B type) of a cargo lifting / lowering device.

FIG. 11 is a view showing a conventional example (C type) of a cargo lifting / lowering device.

FIG. 12 is a diagram showing a conventional example (D type) of a cargo lifting / lowering device.

FIG. 13 is a view showing a conventional example (E type) of a cargo lifting / lowering device.

FIG. 14 is a view showing a conventional example (F type) of a cargo lifting device.

FIG. 15 is a view showing a conventional example (G type) of a cargo lifting / lowering device.

FIG. 16 is a top view showing a fourth embodiment of the load lifting device according to the present invention.

FIG. 17 is a rear view of the fourth embodiment of the cargo lifting device according to the present invention;

FIG. 18 is a side view showing a fourth embodiment of the load lifting device according to the present invention.

FIG. 19 is a perspective view partially showing a fifth embodiment of the cargo lifting apparatus according to the present invention;

FIG. 20 is a side view partially showing a sixth embodiment of the cargo lifting apparatus according to the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automobile 1a Packing floor 1c Vertical joist 1d Tire 1e Horizontal joist 2 Body 3 Rear door 51 Gate post 52 Support post 53 Upper arm 54 Lower arm 55 Connection bar 56 Chain 57 Lift table 58 Chassis frame 59 Bracket 60 Support bar 61 Bracket 62 Lift cylinder

Claims (5)

[Utility model registration claims] 1. A support disposed on both sides of a rear end of a luggage compartment; a support member provided on a chassis frame; one end of the support and a second end of the support member separated by a predetermined center distance. One or more pairs of first and second arm members that are provided rotatably and constitute a parallel link mechanism; a driving unit that drives the column or the first or second arm member; A cargo lifting / lowering device, comprising: a connecting member for connecting a lower side; and a lift table having a slit in a portion corresponding to the chassis frame or the vertical joist and sliding forward and backward on the connecting member. 2. The first and second arm members have an inter-axes distance on the support member side shorter than an inter-axes distance on the support column side, and are lowered substantially vertically when the post is raised. The load lifting device according to claim 1, wherein the device is sometimes inclined backward. 3. The load lifting device according to claim 1, further comprising a rolling member rotatably provided on the connection member and in rolling contact with the lift table. 4. The load lifting device according to claim 1, further comprising a suspending member for suspending the lift table from behind the support column. 5. The apparatus according to claim 4, wherein the length of the hanging member is adjustable.