JP2021038089A - Lift device - Google Patents

Abstract

To provide a lift device which can be easily loaded to or unloaded from a vehicle and enables reduction of a loading space in a luggage room.SOLUTION: A portable lifter 1 includes: a base part 2 having a leg frame 21 extending in a cross direction, front wheels 23 for travelling attached to front end parts of the leg frame 21, and rear wheels 22 for travelling attached to rear end parts of the leg frame 21; and a mast part 3 having a fork shaped loading platform 35 on which luggage may be placed and a mast 30 which supports the fork shaped loading platform 35 in a liftable manner and in which the mast 30 is rotatably supported by the base part 2. The mast 30 rotates relative to the base part 2 to move between a standing attitude in which the mast extends upward from the base part 2 and a fallen attitude in which the mast extends rearward from the base part 2.SELECTED DRAWING: Figure 1

Description

The present invention relates to a lift device capable of raising and lowering a load.

Conventionally, as shown in Patent Document 1, a base portion provided with a traveling front wheel and a traveling rear wheel, a mast erected on the base portion, and a mast that is supported up and down and can be loaded with luggage. Lifting devices such as hand lifts equipped with a mast portion having a simple loading platform are known.

Such a lift device may be used when loading a load into a vehicle. In addition, the lift device that has been loaded into the vehicle may be loaded into the luggage compartment of the vehicle for use when loading and unloading the luggage at the destination of the luggage.

JP-A-2007-302409

As described above, when loading the lift device into the luggage compartment of the vehicle, it is necessary to lift the entire lift device and load it into the luggage compartment of the vehicle, but it is difficult for one worker to load the lift device due to its heavy weight. There was a case. In particular, when the workers were elderly or female, it was difficult to load the lift device into the vehicle.

Further, in the lift device, the base portion extends in the front-rear direction and the mast portion extends in the vertical direction. Therefore, when the lift device is loaded in the luggage compartment, the lift device occupies a large space in the luggage compartment. , The efficiency of transporting luggage by vehicle was to deteriorate.

Therefore, the present invention provides a lift device that can be easily loaded and unloaded on a vehicle and can reduce the loading space in the luggage compartment.

The lift device that solves the above problems has the following features.
That is, the lift device of the present invention has a leg frame extending in the front-rear direction, a traveling front wheel attached to the front end portion of the leg frame, and a traveling rear wheel attached to the rear end portion of the leg frame. It has a base portion, a loading platform on which luggage can be placed, and a mast that supports the loading platform so as to be able to move up and down, and the mast portion is provided with a mast portion that is rotatably supported by the base portion. By rotating with respect to the base portion, the mast can move between an upright posture extending upward from the base portion and a lying posture extending rearward from the base portion. ..

As a result, by loading the lift device into the vehicle while the mast portion is in the prone position, the loading work of the lift device into the vehicle becomes easy. In addition, the loading space of the lift device in the vehicle can be reduced.

Further, the mast portion has a protrusion that projects rearward from the mast when the mast is in the upright posture, and at least the protrusion touches the ground when the mast is in the prone position.

As a result, the mast portion in which the mast is in an inclined posture can be easily grounded.

Further, the protrusion has an auxiliary wheel capable of touching the ground when the mast is in the prone position.

As a result, it is possible to facilitate the moving work of the lift device in the state where the mast is in the prone position.

According to the present invention, loading the lift device into the vehicle while the mast portion is in the prone position facilitates the loading work of the lift device into the vehicle. In addition, the loading space of the lift device in the vehicle can be reduced.

It is a side view which shows the portable lifter. It is a front perspective view which shows the portable lifter. It is a rear upper perspective view which shows a portable lifter. It is a rear lower perspective view which shows a portable lifter. It is a side view which shows the portable lifter in a state where a mast is in a lying position. It is a side view which shows the first half of the work procedure at the time of loading a portable lifter into a vehicle from a traveling front wheel side. It is a side view which shows the latter half of the work procedure at the time of loading a portable lifter into a vehicle from a traveling front wheel side. It is a side view which shows the work procedure at the time of loading a portable lifter into a vehicle from a handle side. It is a side view which shows the portable lifter of the specification which provided the auxiliary wheel on the handle, and the work procedure at the time of loading the portable lifter into a vehicle from a handle side.

Next, a mode for carrying out the present invention will be described with reference to the accompanying drawings.

The portable lifter 1 shown in FIGS. 1 to 4 is an embodiment of the lift device according to the present invention, and has a movable base portion 2 and a mast portion 3 mounted on the base portion 2. There is.

In the following description, the "left side", "right side", "back side of paper", and "front side of paper" in FIG. 1 are referred to as "rear side", "front side", "left side", and "left side" of the portable lifter 1, respectively. Defined as "right side". Further, the "upper side" and "lower side" in FIG. 1 are defined as "upper side" and "lower side" of the portable lifter 1, respectively.

The base portion 2 has a leg frame 21, a traveling rear wheel 22, and a traveling front wheel 23. The leg frame 21 is a frame member that extends in the front-rear direction as a whole. The leg frame 21 includes a pair of left and right front leg frames 211 extending in the front-rear direction, a connecting frame 212 connecting the rear ends of the pair of front leg frames 211 extending in the left-right direction, and a connecting frame 212. It has a pair of left and right rear leg frames 213 extending rearward from the rear. The traveling front wheel 23 is attached to the front end of the front leg frame 211, and the traveling rear wheel 22 is attached to the rear end of the rear leg frame 213.

The mast portion 3 includes a fork-shaped loading platform 35, which is an example of a loading platform on which luggage can be placed, a mast 30 that supports the fork-shaped loading platform 35 so as to be able to move up and down, and a lifting device 5 for raising and lowering the fork-shaped loading platform 35. have.

The mast 30 extends upward from the base portion 2, and includes a pair of left and right vertical frames 31 extending in the vertical direction, a lower frame 32 connecting the lower ends of the pair of vertical frames 31, and a pair of vertical frames. It has an upper frame 33 that connects the upper end portions of the 31 and an intermediate frame 34 that connects the intermediate portions of the pair of vertical frames 31 in the vertical direction. The vertical frame 31 is arranged on the left and right inside of the rear leg frame 213.

The mast 30 has an upright posture extending upward from the base portion 2 (a posture shown by a solid line in FIG. 1) and a lying posture extending rearward from the base portion 2 (a posture shown by a two-dot chain line in FIG. 1). It is configured to be movable between and.

The fork-shaped loading platform 35 has a support portion 351 that is rotatably supported by the vertical frame 31, and a pair of left and right load receiving portions 352 that are rotatably supported by the support portion 351. A slide rail 31a extending in the vertical direction is formed on the left and right inside of the vertical frame 31, and the support portion 351 has a sliding protrusion 351a slidably fitted to the slide rail 31a.

The sliding projection 351a is slidably fitted to the slide rail 31a, so that the support portion 351 is supported by the vertical frame 31 so as to be able to move up and down. As a result, the fork-shaped loading platform 35 can be raised and lowered with respect to the mast 30.

The pair of left and right load receiving portions 352 are configured as fork-shaped load receiving portions, and can rotate up and down about the rotation fulcrum 352a. By rotating around the rotation fulcrum 352a, the load receiving portion 352 is separated from the support portion 351 and is close to the load receiving position (position shown by the solid line in FIG. 1) and the support portion 351. It is possible to move between the folding position (the position indicated by the alternate long and short dash line in FIG. 1).

The lifting device 5 includes a hydraulic base 51, a hydraulic cylinder 52, a pulley 53, a wire 54, an operation pedal 55, and an operation lever 56. The hydraulic base 51 is provided on the lower frame 32 and houses a switching valve for switching the oil feeding direction to the hydraulic cylinder 52, a hydraulic pump for pumping hydraulic oil, and the like.

The hydraulic cylinder 52 is erected on the upper surface of the hydraulic base 51 and has a retractable piston rod 52a. The pulley 53 is attached to the upper end of the piston rod 52a. The wire 54 is bridged between the frame 34 in the middle of the mast 30 and the support portion 351 of the fork-shaped loading platform 35, and is wound around the pulley 53. The operation pedal 55 and the operation lever 56 are supported by the hydraulic base 51.

In the elevating device 5, by rotating the operation pedal 55 up and down, the hydraulic pump in the hydraulic base 51 is operated, the pressure oil is sent to the hydraulic cylinder 52, and the piston rod 52a is extended. When the piston rod 52a is extended, the wire 54 wound around the pulley 53 is pulled upward, and the fork-shaped loading platform 35 connected to the wire 54 rises.

Further, when the operation lever 56 is operated to the lower side to switch the switching valve in the hydraulic base 51, the hydraulic oil in the hydraulic cylinder 52 is sent to the hydraulic oil tank in the hydraulic cylinder 52, and the piston rod 52a is reduced. To do. When the piston rod 52a is reduced, the fork-shaped loading platform 35 is lowered together with the wire 54.

The mast portion 3 has a handle 38. The handle 38 is supported by the upper end portion of the vertical frame 31 of the mast 30, and projects rearward from the vertical frame 31 of the mast 30 in the upright posture. The handle 38 is an example of a protrusion protruding rearward from the mast when the mast is in the upright position. Further, the handle 38 is a grip portion that is gripped by an operator when the portable lifter 1 is driven.

The handle 38 has a pair of projecting portions 38a projecting rearward from the left and right vertical frames 31 and an extending portion 38b connecting the pair of projecting portions 38a and extending along the left-right direction. However, the handle 38 is not limited to this shape as long as it has a shape that protrudes rearward from the mast 30 when the mast 30 is in the upright posture.

The mast 30 of the mast portion 3 is rotatably supported by the base portion 2. Specifically, the lower end of the vertical frame 31 of the mast 30 is rotatably supported by the rear leg frame 213 of the leg frame 21 of the base portion 2 via the rotation shaft 25.

The mast 30 is rotatable about the rotation shaft 25 with respect to the leg frame 21. The mast 30 is configured to be movable between an upright posture and a lying posture by rotating around a rotation shaft 25. The mast 30 can be moved to the prone position by rotating the mast 30 backward from the standing position.

As shown in FIG. 5, when the mast 30 is in the prone position, the extension direction of the mast 30 and the extension direction of the leg frame 21 are substantially parallel to each other. Specifically, when the mast 30 is in the prone position, the extending direction of the front leg frame 211 and the extending direction of the vertical frame 31 of the mast 30 are substantially parallel.

Further, when the mast 30 is in the prone position, the handle 38 of the mast portion 3 is in contact with the ground while the traveling front wheel 23 and the traveling rear wheel 22 of the base portion 2 are in contact with the ground. In this way, when the mast 30 is in the prone position, the handle 38 of the mast portion 3 comes into contact with the traveling front wheel 23 and the traveling rear wheel 22, so that the portable lifter 1 in which the mast 30 is in the prone position is moved in the front-rear direction. It is possible to ground the mast over a wide range and stably support it on the ground surface.

Further, since the mast 30 in the prone position is located above the traveling front wheel 23 and the traveling rear wheel 22 of the base portion 2, the handle 38 protruding downward from the mast 30 in the prone position touches the ground. The mast portion 3 in which the mast 30 is in an inclined posture can be easily brought into contact with the ground.

Further, by using the handle 38 for the traveling operation of the portable lifter 1 as the protrusion that touches the ground when the mast 30 is in the down position, it is necessary to separately provide the protrusion that protrudes downward from the mast 30 in the down position. It is possible to reduce the weight by reducing the number of components of the portable lifter 1.

The portable lifter 1 can also be configured such that when the mast 30 is in the prone position, a portion of the lift portion 3 other than the handle 38 comes into contact with the traveling front wheel 23 and the traveling rear wheel 22. For example, even when the upper frame 33 of the mast 30 or the upper frame 33 side end of the vertical frame 31 is configured to be in contact with the ground when the mast 30 is in the prone position, the portable lifter 1 is stably placed on the ground surface. It is possible to support it.

In the present embodiment, at least a part of the lift portion 3 is in contact with the traveling front wheel 23 and the traveling rear wheel 22 when the mast 30 is in the lying down posture, but the mast 30 is lying down. It is also possible to configure the handle 38 and the like so that at least a part of the lift portion 3 touches the ground together with the traveling rear wheel 22 and the traveling front wheel 23 is slightly lifted from the ground contact surface when in the posture.

Further, the mast portion 3 has a pair of left and right guard members 37. The guard member 37 is provided below the handle 38 in the vertical frame 31 of the mast 30, and projects rearward from the vertical frame 31 in the upright posture. The guard members 37 are arranged on the left and right sides of the operating lever 56, and prevent the operating lever 56 from coming into contact with an object existing around the portable lifter 1.

Lock shafts 61 are supported on the left and right rear leg frames 213. The lock shaft 61 is a shaft member that extends in the left-right direction, and is inserted into support holes 213a formed in the left and right rear leg frames 213. The support hole 213a is formed in an elongated hole shape that inclines downward from the front to the rear, and the lock shaft 61 is slidably inserted into the support hole 213a.

A spring 63 for urging the lock shaft 61 upward is provided between the rear leg frame 213 and the lock shaft 61. When the lock shaft 61 is in a natural state where no force is applied, the lock shaft 61 slides upward due to the urging force of the spring 63 and is located at the upper end portion of the support hole 213a.

Lock plates 62 are attached to the lower ends of the left and right vertical frames 31. The lock plate 62 has an engaging groove 62a with which the lock shaft 61 can be engaged. The lock plate 62 is configured such that the engaging groove 62a engages with the lock shaft 61 located at the upper end of the support hole 213a when the mast 30 is in the upright position.

In a state where the engaging groove 62a of the lock plate 62 and the lock shaft 61 are engaged with each other, the rotational movement of the mast 30 with respect to the leg frame 21 is restricted, and the mast 30 can be maintained in an upright posture.

By pressing the lock shaft 61 downward, the lock shaft 61 can be moved downward from the upper end portion of the support hole 213a against the urging force of the spring 63.

When the lock shaft 61 is moved from the upper end to the lower end of the support hole 213a, the engagement state between the lock shaft 61 and the engagement groove 62a is released, and the mast 30 can rotate with respect to the leg frame 21. .. This makes it possible to move the mast 30 from the standing position to the lying position.

The portable lifter 1 has a lock pin 64 that can switch between a locked state in which the mast 30 is fixed in the prone position and an unlocked state in which the mast 30 is released in the prone position. The lock pin 64 is slidably inserted into one of the left and right rear leg frames 213 in the left-right direction. In this embodiment, the lock pin 64 is provided on the right rear leg frame 213.

An engaging hole 31b with which the lock pin 64 can be engaged is formed in one of the left and right vertical frames 31 of the mast 30. The engagement hole 31b is provided in the vertical frame 31 on the same side as the rear leg frame 213 provided with the lock pin 64 in the left-right direction. In the present embodiment, the engagement hole 31b is provided in the vertical frame 31 on the right side.

Then, the lock pin 64 is engaged with the engagement hole 31b by sliding the lock pin 64 toward the vertical frame 31 in the left-right direction and projecting it from the rear leg frame 213 while the mast 30 is in the prone position. Is possible. When the lock pin 64 is engaged with the engagement hole 31b, the mast 30 is in a locked state in which the rotational movement of the mast 30 with respect to the leg frame 21 is restricted, and the mast 30 can be held in a prone position.

On the other hand, the mast 30 is attached to the leg frame 21 by sliding the lock pin 64 on the side opposite to the vertical frame 31 in the left-right direction to release the engagement state between the lock pin 64 and the engagement hole 31b. It becomes a rotatable unlocked state.

Next, a work procedure for loading the portable lifter 1 into the vehicle 8 will be described. First, as shown in FIG. 6A, the portable lifter 1 with the mast 30 in the upright posture is moved to the rear of the luggage compartment 81 of the vehicle 8, and the load receiving portion 352 of the fork-shaped loading platform 35 is moved to the folded position. At the same time as moving the mast 30, the mast 30 is moved so as to be in a prone position.

When moving the mast 30 from the upright posture to the prone posture, the lock shaft 61 located at the upper end of the support hole 213a is moved to the lower end of the support hole 213a against the urging force of the spring 63. The engagement between the 61 and the engaging groove 62a is released, and the mast 30 is moved from the standing posture to the lying posture. After that, the lock pin 64 is engaged with the engaging hole 31b of the vertical frame 31 to hold the mast 30 in the prone position. When the mast 30 is held in the prone position, the mast 30 and the leg frame 21 extend in a substantially straight line in the front-rear direction.

In this case, the portable lifter 1 is provided with a lock member for fixing the load receiving portion 352 in the folded position, and the lock member can hold the load receiving portion 352 in the folded position. Further, the portable lifter 1 is provided with a lock member for fixing the fork-shaped loading platform 35 to the lower end of the elevating range, and the lock member can hold the fork-shaped loading platform 35 at the lower end of the elevating range. .. As a result, when the portable lifter 1 is loaded on the vehicle 8, it is possible to prevent the load receiving portion 352 and the fork-shaped loading platform 35 from moving unexpectedly.

Next, as shown in FIG. 6B, the traveling front wheel 23 side of the base portion 2 is lifted upward, and the traveling front wheel 23 is placed on the floor surface 81a of the luggage compartment 81 in the vehicle 8. Further, as shown in FIG. 7A, the mast 30 is lifted upward with the traveling front wheel 23 mounted on the floor surface 81a as a fulcrum, and the portable lifter 1 is pushed into the luggage compartment 81.

In this case, since the traveling front wheel 23 side of the base portion 2 is supported by the floor surface 81a of the luggage compartment 81, the weight of the portable lifter 1 when lifting the mast 30 upward is reduced, and the mast 30 is easily lifted. be able to. Further, since the traveling front wheel 23 is in contact with the floor surface 81a of the luggage compartment 81, there is little resistance when pushing the portable lifter 1 into the luggage compartment 81, and the portable lifter 1 can be easily pushed into the luggage compartment 81. You can put it in. This facilitates the loading work of the portable lifter 1 into the vehicle 8.

As shown in FIG. 7B, when the portable lifter 1 pushed into the luggage compartment 81 as a whole enters the luggage compartment 81, the loading operation of the portable lifter 1 into the vehicle 8 is completed. In the portable lifter 1 loaded in the luggage compartment 81, the mast 30 and the leg frame 21 extend substantially in a straight line in the front-rear direction, so that the space occupied in the luggage compartment 81 in the vertical direction is small. The loading space of the portable lifter 1 in the luggage compartment 81 can be reduced.

When loading and unloading the portable lifter 1 from the luggage compartment 81, the loading and unloading work from the vehicle 8 of the portable lifter 1 can be easily performed by performing the loading and unloading work in the reverse procedure of the loading work. It is possible.

Further, when the portable lifter 1 is loaded into the vehicle 8, the upper frame 33 side of the mast 30 can be placed in the luggage compartment 81 first. In this case, as shown in FIG. 8A, after the mast 30 is placed in the prone position, the handle 38 arranged on the upper frame 33 side of the mast 30 is lifted upward and placed on the floor surface 81a of the luggage compartment 81. Since the traveling front wheel 23 of the base portion 2 is in contact with the ground when the handle 38 is lifted, it is easy to move the portable lifter 1 when the lifted handle 38 is placed on the luggage compartment 81.

In a state where the handle 38 is lifted upward and placed in the luggage compartment 81, the extending portion 38b of the handle 38 protruding downward from the mast 30 in the prone position is in contact with the floor surface 81a. Next, as shown in FIG. 8B, the base portion 2 is lifted upward with the extending portion 38b of the handle 38 as a fulcrum, and the portable lifter 1 is pushed into the luggage compartment 81.

In this case, since the handle 38 of the mast portion 3 is supported by the floor surface 81a of the luggage compartment 81, the weight of the portable lifter 1 when lifting the base portion 2 upward is reduced, and the base portion 2 can be easily lifted. Can be lifted.

Further, when the base portion 2 is lifted, the handle 38 protruding from the mast 30 is in contact with the floor surface 81a, so that the vertical frame 31 of the mast 30 is in direct contact with the floor surface 81a. 30 does not slip with respect to the floor surface 81a, and the base portion 2 can be easily lifted.

When loading and unloading the portable lifter 1 loaded into the luggage compartment 81 from the upper frame 33 side of the mast 30 from the luggage compartment 81, the loading and unloading work is performed in the reverse procedure of the loading work. , It is possible to easily carry out loading and unloading work from the vehicle 8 of the portable lifter 1.

As shown in FIG. 9A, in the portable lifter 1, it is possible to provide an auxiliary wheel 39 that can touch the ground when the mast 30 is in the prone position. The auxiliary wheel 39 can be provided, for example, on the handle 38 of the mast portion 3. By providing the auxiliary wheel 39, when the mast 30 is in the laid-down position, the auxiliary wheel 39 can be grounded together with the traveling front wheel 23 and the traveling rear wheel 22, and the mast 30 is in the laid-down position. The movement work of the lifter 1 can be facilitated. It is also possible to provide the auxiliary wheel 39 so as to be in contact with the traveling rear wheel 22 and the traveling front wheel 23 to be slightly floating from the ground contact surface.

Further, as shown in FIG. 9B, when the handle 38 of the mast portion 3 is placed on the floor surface 81a of the luggage compartment 81 and then the base portion 2 is lifted to push the portable lifter 1 into the luggage compartment 81. Since the portable lifter 1 can be moved while the auxiliary wheel 39 is in contact with the floor surface 81a of the luggage compartment 81, it is possible to facilitate the loading work of the portable lifter 1 into the luggage compartment 81. Will be.

If the auxiliary wheel 39 can be grounded when the mast 30 is in the prone position, the portable lifter 1 can be moved in the state where the mast 30 is in the prone position even if the auxiliary wheel 39 is provided in a portion other than the handle 38 in the mast portion 3. The work can be facilitated. Further, the auxiliary wheel 39 provided in the mast portion 3 is portable as long as it is arranged at a position where it can touch the floor surface 81a at least when the upper frame 33 side of the mast 30 is lifted upward and placed on the luggage compartment 81. It is possible to facilitate the loading work of the lifter 1 into the luggage compartment 81.

1 Portable lifter 2 Base 3 Mast 21 Leg frame 22 Rear wheel for running 23 Front wheel for running 25 Rotating shaft 30 Mast 35 Fork type loading platform 38 Handle 39 Auxiliary wheel

Claims (3)

A base portion having a leg frame extending in the front-rear direction, a traveling front wheel attached to the front end portion of the leg frame, and a traveling rear wheel attached to the rear end portion of the leg frame.
It has a loading platform on which luggage can be placed and a mast that supports the loading platform so as to be able to move up and down, and includes a mast portion in which the mast is rotatably supported by the base portion.
By rotating with respect to the base portion, the mast can move between an upright posture extending upward from the base portion and a lying posture extending rearward from the base portion. A lift device characterized by being present. The mast portion has a protrusion portion that protrudes rearward from the mast when the mast is in the upright posture.
The lift device according to claim 1, wherein at least the protrusions come into contact with the ground when the mast is in the prone position. The lift device according to claim 2, wherein the protrusion has an auxiliary wheel that can touch the ground when the mast is in the prone position.

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