JP6232366B2 - Lifting equipment - Google Patents

Description

  The present invention relates to a lifting device, and more particularly to a lifting device for lifting a load to a predetermined height.

Conventionally, as an apparatus for lifting a large box-shaped housing, an apparatus in which a caster is attached to a fulcrum portion of an L-shaped lever using a lever principle is known (see, for example, Patent Document 1).
In addition, there are hand lifts using hydraulic pressure, hydraulic jacks, hand pallets, and jack-up / lifting rollers.

JP 2010-37062 A

  A conventional lifting device using the lever principle is insufficient because a lifting height of only about 30 mm can be obtained during use.

  An object of the present invention is to sufficiently increase the lifting height of a load using a simple structure.

  Hereinafter, a plurality of modes will be described as means for solving the problems. These aspects can be arbitrarily combined as necessary.

A lifting device according to an aspect of the present invention includes a lever member and a movable leg. The lever member has an operation part and a lifting part. The movable leg is rotatably provided on the lifting portion. The movable leg can rotate between a storage position and a stopper position that extends downward from the storage position and stops rotating.
In this apparatus, first, each member is arranged so that the lifting portion of the lever member can support the load of the load during the lifting operation. At this time, the movable leg is in the storage position. Subsequently, for example, when the operator lifts the operating part of the lever member, the lifting part rises with the opposite end opposite to the operating part of the lever member as a fulcrum. Therefore, the movable leg rotates from the storage position to the stopper position. Then, when the operator depresses the operating portion in this state, the lifting portion of the lever member is lifted to a predetermined height with the tip of the movable leg as a fulcrum. In this manner, the movable leg rotates to the stopper position, thereby supporting the load at a position higher than the initial position.

The movable leg may extend obliquely downward in the direction in which the lever member extends with respect to the floor surface at the stopper position.
In this apparatus, since the movable leg extends obliquely downward in the direction in which the lever member extends with respect to the floor surface, it is difficult for the movable leg to rotate to the storage position side after lifting the load, that is, The posture of the lever member and the luggage is stable.

The lifting portion may further include a fixed leg that is shorter than the movable leg and provided on the opposite side of the operation portion with respect to the movable leg.
In this apparatus, the fixed leg functions as a fulcrum on the side opposite to the operation portion of the lever member. Therefore, the lever member can be maintained at a position higher than the floor surface in the initial state.

The lifting device may further include a biasing member that biases the movable leg in the rotation direction.
When a biasing member for biasing the movable leg is provided on the stopper position side, the movable leg is quickly and reliably moved from the storage position side to the stopper position side by the biasing member during the operation of lifting the load by the lever member. To turn. When a biasing member for biasing the movable leg is provided on the storage position side, the movable leg is quickly and reliably moved from the stopper position side to the storage position side by the biasing member during the operation of lowering the load by the lever member. To turn.

The lifting portion has a pair of lifting portions separated in a direction intersecting with the direction in which the lever member extends, and the movable legs may be provided in the pair of lifting portions, respectively.
In this apparatus, the lever member can support the load of the load from both sides of the load by the pair of lifting portions and the movable legs provided on each of the lift portions. Therefore, the posture of the load during and after the lifting operation is stabilized.

The lifting device may further include a pair of urging members that urge the movable legs in the rotation direction.
When a biasing member for biasing the movable leg is provided on the stopper position side, the movable leg is quickly and reliably moved from the storage position side to the stopper position side by the biasing member during the operation of lifting the load by the lever member. To turn. When a biasing member for biasing the movable leg is provided on the storage position side, the movable leg is quickly and reliably moved from the stopper position side to the storage position side by the biasing member during the operation of lowering the load by the lever member. To turn.

A lifting device according to another aspect of the present invention includes a lever member having an operation portion and a lifting portion, and a pair of the lifting portions that are arranged side by side in the extending direction of the lever member and are rotatable. And movable legs.
Each movable leg is rotatable between a storage position and a stopper position that extends downward from the storage position and stops the rotation.
In this apparatus, first, each member is arranged so that the lifting portion of the lever member can support the load of the load during the lifting operation. At this time, the movable leg is in the storage position. Subsequently, for example, when the operator lifts the operating part of the lever member, the lifting part rises with the opposite end opposite to the operating part of the lever member as a fulcrum. Therefore, the movable leg on the operation unit side rotates from the storage position to the stopper position. Then, when the operator depresses the operation part in this state, the lifting part of the lever member is lifted with the tip of the movable leg on the operation part side as a fulcrum, and the movable leg on the opposite side to the operation part moves from the storage position to the stopper position. Rotate. In this way, the pair of movable legs rotate to the stopper position, thereby supporting the load at a position higher than the initial position.
In this apparatus, when the load is lifted, the pair of movable legs support the lever member side by side in the extending direction of the lever member, so that it is not necessary for the operator to hold the operation unit by hand.

  In the lifting device according to the present invention, the lifting height of the load can be sufficiently increased using a simple structure.

The perspective view of the lifting apparatus which concerns on 1st Embodiment of this invention. FIG. Sectional drawing of a load and a hook metal fitting. The partial side view of the stopper structure of a movable leg. The schematic side view of the lifting apparatus for demonstrating lifting operation | movement. The schematic side view of the lifting apparatus for demonstrating lifting operation | movement. The schematic side view of the lifting apparatus for demonstrating lifting operation | movement. The schematic side view of the lifting apparatus for demonstrating lifting operation | movement. The schematic side view of the lifting apparatus for demonstrating lowering operation | movement. The schematic side view of the lifting apparatus for demonstrating lowering operation | movement. The schematic side view of the lifting apparatus for demonstrating lowering operation | movement. The schematic side view of the lifting apparatus for demonstrating lowering operation | movement. The schematic side view of the lifting apparatus for demonstrating lowering operation | movement. The schematic side view (2nd Embodiment) of the lifting apparatus for demonstrating lifting operation | movement. The schematic side view (4th Embodiment) of the lifting apparatus for demonstrating lifting operation | movement. The schematic side view (4th Embodiment) of the lifting apparatus for demonstrating lifting operation | movement. The schematic side view (4th Embodiment) of the lifting apparatus for demonstrating lifting operation | movement. The schematic side view (4th Embodiment) of the lifting apparatus for demonstrating lowering operation | movement. The schematic side view (4th Embodiment) of the lifting apparatus for demonstrating lowering operation | movement. The schematic side view (4th Embodiment) of the lifting apparatus for demonstrating lowering operation | movement. The schematic side view (4th Embodiment) of the lifting apparatus for demonstrating lowering operation | movement. The schematic side view of the lifting device for explaining the lifting operation (fifth embodiment). Schematic side view of a lifting device for explaining a lifting operation (seventh embodiment). Schematic side view of a lifting device for explaining a lifting operation (seventh embodiment). Schematic side view of a lifting device for explaining a lifting operation (seventh embodiment).

1. First Embodiment (1) Lifting Device A schematic configuration of a lifting device 1 as a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of a lifting device 1 according to a first embodiment of the present invention. FIG. 2 is a perspective view of the luggage W. FIG. FIG. 3 is a cross-sectional view of the luggage W and the hook 21. In the following description, the left-right direction in FIG. 1 is referred to as the front-rear direction, and the depth direction in FIG. In particular, the right side of FIG. 1 is referred to as the front side, and the left side of FIG. 1 is referred to as the rear side.
The lifting device 1 is a device that can lift the load W to a predetermined height by using the lever principle.

(2) Baggage As shown in FIGS. 1 and 2, the baggage W to be lifted is a box-shaped housing. The luggage W has a weight or a size that is difficult for an operator to lift directly by himself / herself, and / or works such as attachment of parts while maintaining the lifted state. The shape of the luggage W is not limited to this embodiment.

The hook 21 attached to the luggage W will be described. The hook 21 is a member that is attached to the load W when the load W is lifted by the lifting device 1, and constitutes a portion that is supported by the lifting device 1.
As shown in FIG. 2, slits 31 are formed below both side surfaces of the luggage W in the left-right direction. In this embodiment, the number of slits 31 is two on each side, and they are arranged in the front-rear direction. The slit 31 is a rectangle that extends long in the front-rear direction.

  The hook 21 is detachable from the slit 31 without using a special member. Specifically, the hook 21 includes a first portion 21a (mounting portion), a second portion 21b (a portion that receives the load of the load W), a third portion 21c, a fourth portion 21d, And a fifth portion 21e (a portion on which the lifting force from the lifting device 1 acts). The first portion 21a has a magnet 27 bonded thereto, so that the first portion 21a can be fixed to the case of the luggage W. The second portion 21b is bent at a right angle from one end of the first portion 21a. The third portion 21c is bent at a right angle from one end of the second portion 21b, and as a result, extends in parallel with the first portion 21a. The fourth portion 21d is bent at a right angle from one end of the third portion 21c, and as a result, extends in parallel with the second portion 21b. The fifth portion 21e is bent so as to be bent from one end of the first portion 21a and extends in parallel with the first portion 21a.

As shown in FIG. 2, the hook 21 is inserted into the slit 31 on the fourth portion 21 d side and rotated so that the first portion 21 a is raised with the third portion 21 c in the slit 31. The magnet 27 is fixed to the upper part of the slit 31 of the luggage W. Thus, the hook 21 is a handle that protrudes from the side surface of the luggage W. Further, in this state, as shown in FIG. 3, since the tip of the fourth portion 21d is pressed against the inner surface of the casing of the luggage W, it is difficult for slipping or disconnection between the hook metal 21 and the casing. .
In addition, the shape, the number, the attachment position, and the attachment method of the hook metal fitting are not limited to the above-described embodiment. For example, only one hook may be attached to the left and right sides, or three or more may be attached. For example, the portion on which the lifting force from the hook lifting device 1 acts may be a flat portion bent at a right angle from the first portion.
Furthermore, the structure which implement | achieves the function as a handle | steering-piece by a part of luggage | loading projecting to the side may be sufficient with a hook metal fitting abbreviate | omitted. In addition, the handle itself may be omitted as long as there is a configuration in which the lifting force from the lifting device acts on the load.

(3) Configuration of Lifting Device As shown in FIG. 1, the lifting device 1 is a device configured to lift a load W to a predetermined height by an operator operating the device with a plurality of frames. is there. FIG. 1 shows a state where the luggage W is lifted by the lifting device 1.
The lifting device 1 mainly includes a pair of lever members 3 and a pair of front movable legs 5A and rear movable legs 5B provided on each lever member 3.

The pair of lever members 3 are elongated rod-like members, are separated in the left-right direction intersecting with the front-rear direction in which the lever member 3 extends, and are disposed on both sides of the luggage W in the left-right direction. The lever member 3 has an operation part 3a and a lifting part 3b. The lifting portion 3b is provided at a position corresponding to the luggage W, and the operation portion 3a extends from the lifting portion 3b to the front side in the front-rear direction. In the state of FIG. 1, the lever member 3 takes a posture extending horizontally with respect to the floor surface FL.
As shown in FIG. 3, the lever member 3 is engaged with the hook metal 21 so that the hook metal 21 can be lifted. Specifically, the lever member 3 has a groove 3c into which the fifth part 21e of the hook 21 is inserted from above. Thereby, the lever member 3 can pull up the hook metal fitting 21. The fifth portion 21e can be detached in the vertical direction with respect to the groove 3c.

The engagement structure between the lever member 3 and the hook metal 21 is not limited to the above embodiment, as long as the hook metal 21 is supported from below so that it can be detached from the lever member 3 in the vertical direction. For example, when the fifth portion 21 e of the metal fitting is a flat portion, the flat portion may be engaged so as to contact the upper surface of the lever member 3.
In the above-described embodiment, the lever member 3 is directly engaged with a part of the luggage W, but the lever member 3 may be engaged with a part of the luggage W via another member.
Furthermore, in the above-described embodiment, the lever member 3 is a single rod-shaped member. However, the lever member 3 may have a structure in which the load W can be raised and lowered by the operation portion 3a and the lifting portion 3b. It may be configured by a combination, and the shape is not limited to a rod shape.

The pair of front movable legs 5 </ b> A and rear movable legs 5 </ b> B are members for supporting a load acting on the lever member 3. The front movable leg 5A and the rear movable leg 5B are rotatably provided on the lifting portion 3b. More specifically, the front movable leg 5 </ b> A and the rear movable leg 5 </ b> B are arranged side by side in the longitudinal direction of the lever member 3. The front movable leg 5A and the rear movable leg 5B are located between the storage position (closed leg state) and the stopper position (the state shown in FIG. 1 and the open leg state) that extends downward from the storage position and stops rotating. Can be rotated. In FIG. 1, the front movable leg 5 </ b> A and the rear movable leg 5 </ b> B rotate to the stopper position to support the load W at a position higher than the initial position (for example, the floor surface FL).
The front movable leg 5A and the rear movable leg 5B extend obliquely downward in the front-rear direction in which the lever member 3 extends with respect to the floor surface FL at the stopper position. Specifically, the front movable leg 5A extends obliquely to the front side, and the rear movable leg 5B extends obliquely to the rear side. For this reason, it is difficult for the front movable leg 5A and the rear movable leg 5B to turn to the storage position side after the luggage W is lifted, that is, the posture of the lever member 3 and the luggage W is stable. The front movable leg 5A and the rear movable leg 5B may extend substantially perpendicular to the floor surface FL at the stopper position.

In this embodiment, the lengths of the front movable legs 5A and the rear movable legs 5B and the inclination angles at the stopper positions are made the same so that the lever member 3 is horizontal with respect to the floor surface FL while the load W is lifted. ing. However, the length of the front movable leg 5A and the rear movable leg 5B may be different from each other in the length and / or the inclination angle at the stopper position.
The turning structure of the front movable leg 5A will be specifically described with reference to FIG. The upper end of the front movable leg 5A is rotatably fixed by a pair of support plates 9A provided on both side surfaces of the lever member 3 and a rotation center member 11A fixed thereto. In FIG. 4, in the front movable leg 5A, the upper position is the storage position, and the lower position is the stopper position. A stopper member 12 is fixed between the front portions of the pair of support plates 9A. At the stopper position, the front movable leg 5A is in contact with the stopper member 12 so that the front movable leg 5A cannot be rotated any further. The rotating structure of the rear movable leg 5B is the same as the front movable leg 5A in the front-rear symmetry.
The above-described stopper mechanism is not particularly limited in the type, position, etc. of the members constituting it. Moreover, FIG. 4 is typical description, Comprising: The dimension and positional relationship of each member are not limited to this.

The lifting height of the lever member 3 is determined by the lengths of the front movable leg 5A and the rear movable leg 5B. Therefore, the front movable leg 5A and the rear movable leg 5B are replaced according to the intended work. Further, the length adjustment structure may be provided on the front movable leg 5A and the rear movable leg 5B.
A rear fixed leg 15 is provided on the lifting portion 3b. The rear fixed leg 15 is provided on the opposite side of the operation portion 3a with respect to the front movable leg 5A and the rear movable leg 5B. The rear fixed leg 15 functions as a fulcrum on the side opposite to the operation portion 3 a of the lever member 3. Thus, as shown in FIG. 5, the lever member 3 can be maintained at a position higher than the floor surface FL in the initial state by the rear side fixing legs 15. Specifically, the rear fixed leg 15 extends downward from the lever member 3 at a right angle on the further rear side of the load W.

Furthermore, the front side fixed leg 13 is provided in the lifting part 3b. The front fixed leg 13 is provided on the operation unit 3a side with respect to the front movable leg 5A and the rear movable leg 5B. Specifically, the front fixed leg 13 extends downward from the lever member 3 at a right angle on the further front side of the load W. In the state of FIG. 1, the lower surfaces of the front side fixed legs 13 and the rear side fixed legs 15 are higher than the floor surface FL.
The front fixed leg 13 and the rear fixed leg 15 are shorter than the front movable leg 5A and the rear movable leg 5B. The positions and shapes of the front fixed leg 13 and the rear fixed leg 15 are not particularly limited.
The lower ends of the front movable legs 5A and the rear movable legs 5B are closer to or equivalent to the lever member 3 than the lower ends of the front fixed legs 13 and the rear fixed legs 15 in the storage position (see FIG. 5). At the stopper position, it is separated from the lever member 3 from the lower ends of the front and rear fixed legs 13 and 15 (see FIG. 8).

As shown in FIG. 1, the front ends of the operation unit 3 a are connected by a front connecting member 23. The front connection member 23 is an elongated rod-shaped member. The front connecting member 23 improves the rigidity of the entire lifting device 1 and makes it easy for the operator to operate the operation unit 3a. The front connection member 23 may be considered as a part of the operation unit 3a. The position of the front end of the operation unit 3a can be adjusted by replacing the lever member 3. Further, a length adjusting mechanism may be provided in the operation unit 3a. Thereby, an appropriate lifting force can be generated in accordance with the weight of the load W.
The operator operates the lifting device 1 by standing on the front side of the front side connecting member 23 and holding the front side connecting member 23 facing the luggage W side.

As shown in FIG. 1, the rear ends of the lifting portion 3 b are connected by a rear connecting member 25. The rear side connecting member 25 is an elongated rod-shaped member. The rear connecting member 25 improves the rigidity of the lifting device 1 as a whole.
The front connection member 23 and the rear connection member 25 can be easily detached from the left and right lever members 3. Thus, the left and right assembly members (the lever member 3, the front movable leg 5A, the rear movable leg 5B, the front fixed leg 13, and the rear fixed leg 15), the front connecting member 23, and the rear connecting member 25 are used except when in use. It can be managed and transported in a state where it is separated and then put together.

The lifting device 1 further includes a front urging member 17A and a rear urging member 17B that urge the front movable leg 5A and the rear movable leg 5B to the stopper position side or the storage position side, respectively. In the case of a biasing member that biases toward the stopper position side, the front movable leg 5A and the rear movable leg 5B are moved by the front biasing member 17A and the rear biasing member 17B during the lifting operation of the load W, respectively. It rotates quickly and reliably from the storage position side to the stopper position side. When the urging member is urged toward the storage position, the front movable leg 5A and the rear movable leg 5B are respectively moved by the front urging member 17A and the rear urging member 17B during the lowering operation of the load W. It rotates quickly and reliably from the stopper position side to the storage position side. The front urging member 17A and the rear urging member 17B shown in FIG. 1 are tension coil springs. During the lifting operation of the load W, the front urging member 17A has one end locked to the front fixed leg 13 and the other end locked to the front movable leg 5A. The rear urging member 17B has one end locked to the rear fixed leg 15 and the other end locked to the rear movable leg 5B during the lifting operation of the load W. The front urging member 17A is engaged with the lifting portion 3b at one end and the front movable leg 5A at the other end when the luggage W is lowered. The rear urging member 17B has one end locked to the lifting portion 3b and the other end locked to the rear movable leg 5B when the luggage W is lowered. At least one end of the front urging member 17A and the rear urging member 17B is detachably fixed to the counterpart member.
Since the urging member only needs to apply the urging force described above to the front movable leg 5A and the rear movable leg 5B, the type, the number, the locking position, and the locking means are not limited to the above embodiment. For example, the urging member may be another type of elastic member such as a spring or rubber. The locking means can use a known technique such as a combination of a hook and an engaging portion.

(4) Lifting operation The lifting operation of a load will be described with reference to FIGS. 5 to 9 are schematic side views of the lifting device 1 for explaining the lifting operation. In each figure, luggage is omitted.
First, as shown in FIG. 5, the members are arranged so that the lifting portion 3b of the lever member 3 can support the load of the load (not shown) during the lifting operation. At this time, the front movable leg 5A and the rear movable leg 5B are in the storage position. The lever member 3 is supported on the floor surface FL by the front fixed leg 13 and the rear fixed leg 15. Note that since the load (not shown) is supported on the floor surface FL, the load of the load (not shown) has little or no effect on the lever member.

Further, the front urging member 17A and the rear urging member 17B are mounted on the front movable leg 5A and the rear movable leg 5B so that an urging force that rotates from the storage position to the stopper position acts. The Specifically, one end of the front urging member 17A and the rear urging member 17B is locked to the front fixing leg 13 and the rear fixing leg 15, respectively.
Subsequently, as shown in FIG. 6, when the operator lifts the operating portion 3 a of the lever member 3, the lifting portion 3 b rises with the rear fixed leg 15 of the lever member 3 as a fulcrum.
Therefore, as shown in FIG. 7, the front movable leg 5A rotates from the storage position side to the stopper position side. Here, during the operation of lifting the load (not shown), the front movable member 5A rotates the front movable leg 5A quickly and reliably from the storage position side to the stopper position side. In this state, the operator releases the lever member 3 by loosening or releasing his / her hand from the operation unit 3a. As a result, the posture of the lever member 3 is maintained by the rear fixed leg 15 and the front movable leg 5A.

Next, when the operator depresses the operation portion 3a, the lifting portion 3b rises with the front movable leg 5A of the lever member 3 as a fulcrum. Therefore, the rear movable leg 5B rotates from the storage position side to the stopper position side. Here, during the operation of lifting the load (not shown), the rear urging member 17B causes the rear movable leg 5B to rotate quickly and reliably from the storage position side to the stopper position side. As a result, as shown in FIG. 8, the lifting portion 3b of the lever member 3 is lifted by the front movable leg 5A and the rear movable leg 5B, and the lever member 3 is maintained in a horizontal posture at that position. In this state, even if the operator removes his / her hand from the operation portion 3a, the rear movable leg 5B and the front movable leg 5A are separated from each other in the extending direction of the lever member 3 and support the lever member 3, so that the lever member 3 Therefore, the operator does not need to support the lever member 3.
As described above, the lever member 3 and the load (not shown) are lifted.
The above operation is performed in the same manner on the left and right sides of the luggage (not shown), that is, the pair of lever members 3.

  A fork claw is inserted or a caster is attached to the lower surface of the luggage (not shown) using the gap formed between the luggage (not shown) and the floor surface FL by this lifting operation. In other cases, an optional base is inserted and fixed, or a cart with casters is inserted and arranged.

(5) Unloading operation The unloading operation will be described with reference to FIGS. 9 to 13 are schematic side views of the lifting device 1 for explaining the lowering operation. In each figure, luggage is omitted.

First, as shown in FIG. 9, the front urging member 17A and the rear urging member 17B are replaced so that the front movable leg 5A and the rear movable leg 5B rotate from the stopper position to the storage position. Make sure that the energizing force is applied. Specifically, one end of the front biasing member 17A and the rear biasing member 17B is locked near the middle of the lifting portion 3b.
Subsequently, as shown in FIG. 9, when the operator pushes down the operation portion 3 a of the lever member 3, the lifting portion 3 b is lifted with the front movable leg 5 </ b> A of the lever member 3 as a fulcrum.
Therefore, as shown in FIG. 10, the rear movable leg 5B rotates from the stopper position side to the storage position side. Here, during the operation of raising the rear side of the lifting portion 3b, the rear movable leg 5B is quickly and reliably rotated from the stopper position side to the storage position side by the rear biasing member 17B.

Next, as shown in FIG. 11, when the operator releases his hand from the operation unit 3a or loosens his hand, the rear part of the lifting unit 3b moves downward with the lower end of the front movable leg 5A as a fulcrum.
Next, when the operator lifts the operating portion 3a, the lifting portion 3b rises with the lower end of the rear fixed leg 15 as a fulcrum. As a result, as shown in FIG. 12, the front movable leg 5A rotates from the stopper position side to the storage position side. Here, during the operation of raising the front side of the lifting portion 3b, the front side movable leg 5A is quickly and reliably rotated from the stopper position side to the storage position side by the front side urging member 17A.

Finally, when the operator releases his hand from the operation portion 3a or loosens his hand, the front portion of the lever member 3 also moves downward as shown in FIG. 13 and is moved by the front side fixing leg 13 and the rear side fixing leg 15 as shown in FIG. The lever member 3 is in a horizontal state.
For example, when a platform (not shown) is mounted on the lower surface of the luggage (not shown) when it is lifted, the platform (not shown) is in the process of lowering the luggage (not shown). ) Comes into contact with the floor surface FL, and then the lever member 3 is detached downward from the hook 21. In this way, a load (not shown) on which a gantry (not shown) is mounted is placed on the floor surface FL.
The above operation is performed in the same manner on the left and right sides of the luggage (not shown), that is, with the pair of lever members 3.

(6) Effects of Embodiment The effects of the first embodiment will be described below. Note that the following effects are based on a plurality of techniques of the embodiment, and are not the same as the effects of the present invention. Also, the following effects need not all be achieved simultaneously.
(A) The load W can be lifted to a sufficient height. For example, it is possible to lift 50 mm or more. As a result, it is possible to scoop and carry the baggage with the claws of the hand lift or hand pallet.
(B) The luggage W can be lifted to a predetermined height simply by repeating the operation of raising and lowering the operation unit 3a.

(C) The lifting device does not require a power source, a drive mechanism, or the like, and can be reduced in weight and size.
(D) Since the space required around the baggage W during the lifting operation is only on the front side of the baggage W (the operation unit 3a, the front side connecting member 23, the worker's work space), Even in a situation where the luggage W is placed on the rear side with no space, the lifting work of the luggage W can be performed.
(E) By using the lever principle, an operator with relatively weak force can lift a heavy object.

2. Second Embodiment In the first embodiment, the urging member is used to rotate the movable leg during the lifting operation and the lowering operation. However, the urging member can be omitted because the movable leg only needs to be appropriately rotated between the storage position side and the stopper position side.
Such an embodiment is shown in FIG. FIG. 14 is a schematic side view of the lifting device for explaining the lifting operation.
In this case, for example, the front movable leg 5A and the rear movable leg 5B rotate from the storage position side to the stopper position side by their own gravity, and rotate from the stopper position side to the storage position side by a reaction force from the floor surface FL. Move.

3. Third Embodiment In the first and second embodiments, a pair of lever members are arranged on both sides of the load. However, one lever member may be provided depending on the type and shape of the load. In that case, the same functions and effects as those of the first and second embodiments can be obtained.

4). Fourth Embodiment In the first, second, and third embodiments, two movable legs are provided for one lever member, but one movable leg may be provided for one lever member. .
(1) Configuration of Lifting Device Such an embodiment will be described with reference to FIGS. 15 to 17 are schematic side views of the lifting device 101 for explaining the lifting operation. 18 to 21 are schematic side views of the lifting device 101 for explaining the lowering operation.
As shown in FIG. 15, the lifting device 101 mainly has a lever member 3 and a movable leg 5 </ b> C provided on the lever member 3.

The lever member 3 is a rod-like member that extends elongated. The lever member 3 has an operation part 3a and a lifting part 3b. The lifting portion 3b is provided at a position corresponding to a load (not shown), and the operation portion 3a extends from the lifting portion 3b to the front side in the front-rear direction. In the state of FIG. 15, the lever member 3 is in a posture extending horizontally with respect to the floor surface FL.
The movable leg 5 </ b> C is a member for supporting a load acting on the lever member 3. The movable leg 5C is rotatably provided on the lifting portion 3b. The movable leg 5C is rotatable between a storage position (state shown in FIG. 15) and a stopper position that extends downward from the storage position and stops rotating. In FIG. 15, the movable leg 5C is rotated to the storage position.

A rear fixed leg 15 is provided on the lifting portion 3b. The rear fixed leg 15 is provided on the side opposite to the operation portion 3a with respect to the movable leg 5C. The rear fixed leg 15 functions as a fulcrum on the side opposite to the operation portion 3 a of the lever member 3. In this way, the lever member 3 can be disposed at a position higher than the floor surface FL at the initial position by the rear side fixing leg 15. Specifically, the rear fixed leg 15 extends downward from the lever member 3 at a right angle on the further rear side of the load (not shown).
In this embodiment, the front side fixing leg is not provided, but the front side fixing leg may be provided.
The rear fixed leg 15 is shorter than the movable leg 5C. The position and shape of the rear fixed leg 15 are not particularly limited.

The lower end of the movable leg 5C is closer to or equivalent to the lever member 3 than the lower end of the rear fixed leg 15 in the storage position, and the lever member 3 from the lower end of the rear fixed leg 15 in the stopper position. Away from.
The lifting device 101 further includes a biasing member 17C that biases the movable leg 5C toward the stopper position or the storage position (see FIG. 15). When the urging member urges the movable leg 5C toward the stopper position, the movable leg 5C is moved from the storage position side to the stopper position side by the urging member 17C during the operation of lifting the load (not shown). Rotate quickly and reliably. When the urging member urges the movable leg 5C toward the storage position, the movable leg 5C is moved from the stopper position side to the storage position side by the urging member 17C during the operation of lowering the load (not shown). Rotate quickly and reliably.

(2) Lifting operation The lifting operation of a load will be described with reference to FIGS. In each figure, luggage is omitted.

First, as shown in FIG. 15, the members are arranged so that the lifting portion 3 b of the lever member 3 supports the load of the load (not shown). At this time, the movable leg 5C is in the storage position. The lever member 3 is supported on the floor surface FL by the rear fixed leg 15.
First, as shown in FIG. 15, the urging member 17C is replaced so that the urging force that rotates from the storage position side to the stopper position side acts on the movable leg 5C. Specifically, one end of the urging member 17C is locked to the front portion of the lifting portion 3b.

Subsequently, as shown in FIG. 15, when the operator lifts the operating portion 3 a of the lever member 3, the lifting portion 3 b rises with the rear fixed leg 15 of the lever member 3 as a fulcrum.
Therefore, as shown in FIG. 16, the movable leg 5C rotates from the storage position side to the stopper position side. Here, during the operation of lifting the luggage (not shown), the movable leg 5C is quickly and reliably rotated from the storage position side to the stopper position side by the urging member 17C.

Next, when the operator pushes down the operation portion 3a, the liftable portion 3b rises with the movable leg 5C of the lever member 3 as a fulcrum. As a result, as shown in FIG. 17, the lifting portion 3b can be placed in a horizontal posture and maintained at that position. As described above, the lever member 3 and the load (not shown) are lifted.
The above operation is performed in the same manner on the left and right sides of the load (not shown), that is, the pair of lever members 3 as in the first embodiment.

  As shown in FIG. 17, the movable leg 5 </ b> C extends obliquely downward in the front-rear direction in which the lever member 3 extends with respect to the floor surface FL at the stopper position. Specifically, the movable leg 5C extends obliquely to the front side. For this reason, after lifting a load (not shown), it is difficult for the movable leg 5C to turn to the storage position side, that is, the posture of the lever member 3 and the load (not shown) is stable. The movable leg 5C may extend substantially perpendicular to the floor surface FL at the stopper position.

(3) Unloading operation The unloading operation will be described with reference to FIGS. In each figure, luggage is omitted.

First, as shown in FIG. 18, the urging member 17C is replaced so that the urging force that rotates from the stopper position side to the storage position side acts on the movable leg 5C. Specifically, one end of the urging member 17C is locked to the rear portion of the lifting portion 3b.
Subsequently, as shown in FIG. 19, when the operator lifts the operating portion 3 a of the lever member 3, the lifting portion 3 b rises with the rear fixed leg 15 of the lever member 3 as a fulcrum.
Therefore, as shown in FIG. 20, the movable leg 5C rotates from the stopper position side to the storage position side. Here, during the operation of raising the front side of the lifting portion 3b, the movable leg 5C is quickly and reliably rotated from the stopper position side to the storage position side by the urging member 17C.

Finally, when the operator relaxes or releases his / her hand from the operation unit 3a, the lever member 3 is brought into a horizontal state by the rear fixing leg 15 as shown in FIG.
For example, when the platform is mounted on the lower surface of the luggage (not shown) when it is lifted (not shown), the platform is placed on the floor FL during the operation of lowering the luggage (not shown). After that, the lever member 3 is detached downward from the hook 21. In this way, a load (not shown) on which a gantry (not shown) is mounted is placed on the floor surface FL.
The above operation is performed in the same manner on the left and right sides of the luggage (not shown), that is, the pair of lever members 3.

5. Fifth Embodiment In the fourth embodiment, the urging member is used to rotate the movable leg during the lifting operation and the lowering operation. However, since the movable leg only needs to be appropriately rotated between the storage position side and the stopper position side, the urging member can be omitted.
Such an embodiment is shown in FIG. FIG. 22 is a schematic side view of the lifting device for explaining the lifting operation.
In this case, for example, the movable leg 5C rotates from the storage position side to the stopper position side by its own gravity when lifting the load, and from the stopper position side by the reaction force from the floor surface FL when lowering the load. Rotate to the side.

6). Sixth Embodiment In the fourth and fifth embodiments, a pair of lever members are arranged on both sides of the load, but there may be one lever member depending on the type and shape of the load. In that case, the same functions and effects as those of the fourth and fifth embodiments can be obtained.

7). 7th Embodiment In the said 1st-6th embodiment, although the rear side fixing leg 15 was provided in the lever member, the rear side fixing leg 15 may be abbreviate | omitted.
(1) Lifting device Such an embodiment will be described with reference to FIGS. 23 to 25 are schematic side views of the lifting device 201 for explaining the lifting operation.
As shown in FIG. 23, the lifting device 201 mainly has a lever member 3 and a movable leg 5 </ b> C provided on the lever member 3.

  The lever member 3 is a rod-like member that extends elongated. The lever member 3 has an operation part 3a and a lifting part 3b. The lifting portion 3b is provided at a position corresponding to a load (not shown), and the operation portion 3a extends from the lifting portion 3b to the front side in the front-rear direction. In the state of FIG. 23, the lever member 3 is in a posture extending horizontally with respect to the floor surface FL.

The movable leg 5 </ b> C is a member for supporting a load acting on the lever member 3. The movable leg 5C is rotatably provided on the lifting portion 3b. Specifically, the movable leg 5C is rotatable between a storage position (the state shown in FIG. 23) and a stopper position that extends downward from the storage position and stops rotating. In FIG. 23, the movable leg 5C is rotated to the storage position.
The lifting portion 3b is not provided with a rear fixed leg. Therefore, the lever member 3 is disposed close to the floor surface FL.

(2) Lifting operation The lifting operation of a load will be described with reference to FIGS.
First, as shown in FIG. 23, the members are arranged such that the lifting portion 3b of the lever member 3 supports the load of the load (not shown). At this time, the movable leg 5C is in the storage position.
Subsequently, when the operator lifts the operating portion 3a of the lever member 3, as shown in FIG. 24, the lifting portion 3b rises with the rear end 3d of the lever member 3 as a fulcrum.
Therefore, as shown in FIG. 24, the movable leg 5C rotates from the storage position side to the stopper position side.

Next, when the operator pushes down the operation portion 3a, the liftable portion 3b rises with the movable leg 5C of the lever member 3 as a fulcrum. As a result, as shown in FIG. 25, the lifting portion 3b can be set in a horizontal posture and maintained at that position. As described above, the lever member 3 and the load (not shown) are lifted.
The above operation is performed in the same manner on the left and right sides of the load (not shown), that is, the pair of lever members 3 as in the first embodiment.

  The movable leg 5C extends obliquely downward in the front-rear direction in which the lever member 3 extends with respect to the floor surface FL at the stopper position. Specifically, the movable leg 5C extends obliquely to the front side. For this reason, after lifting a load (not shown), it is difficult for the movable leg 5C to turn to the storage position side, that is, the posture of the lever member 3 and the load (not shown) is stable. The movable leg 5C may extend substantially perpendicular to the floor surface FL at the stopper position.

(3) Lowering operation Since the lowering operation may be performed opposite to the above-described lifting operation, description thereof is omitted.

8). Eighth Embodiment In the seventh embodiment, the urging member is not used to rotate the movable leg during the lifting operation and the lowering operation. However, the movable leg is appropriately disposed between the storage position side and the stopper position side. Therefore, an urging member may be provided.

9. Ninth Embodiment In the seventh and eighth embodiments, a pair of lever members are arranged on both sides of the load, but there may be one lever member depending on the type and shape of the load. In that case, the same functions and effects as those of the seventh and eighth embodiments can be obtained.

10. Common Items of Embodiments The first to ninth embodiments have the following configurations and functions in common.
The lifting device (for example, the lifting device 1, 101, 201) includes a lever member (for example, the lever member 3) and movable legs (for example, the front movable leg 5A, the rear movable leg 5B, and the movable leg 5C). Yes. The lever member has an operation part (for example, the operation part 3a) and a lifting part (for example, the lifting part 3b). The movable leg is rotatably provided on the lifting portion. The movable leg has a storage position (for example, see FIGS. 5, 13, 14, 15, 21, 22, and 23) and a stopper position that extends downward from the storage position and stops its rotation ( For example, it is possible to rotate between FIG. 1, FIG. 8, FIG. 9, FIG. 17, FIG.

  In this apparatus, first, each member is arranged so that the lifting portion of the lever member can support the load of the load during the lifting operation (for example, FIG. 5, FIG. 14, FIG. 15, FIG. 21, FIG. 22, (See FIG. 23). At this time, the movable leg is in the storage position. Subsequently, for example, when the operator lifts the operation part of the lever member, the opposite end (for example, the rear fixed leg 15 and the rear end 3d) opposite to the operation part of the lever member serves as a fulcrum. The lifting part rises. Therefore, the movable leg rotates from the storage position to the stopper position (see, for example, FIGS. 7, 16, and 24). Then, when the operator depresses the operation unit in that state, the lifted portion of the lever member is lifted to a predetermined height with the tip of the movable leg as a fulcrum (see, for example, FIGS. 8, 17, and 25). . In this way, the movable leg rotates to the stopper position, thereby supporting the load at a position higher than the initial position (see, for example, FIGS. 1, 8, 17, and 25). .

11. Other Embodiments Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the invention. In particular, a plurality of embodiments and modifications described in this specification can be arbitrarily combined as necessary.
For example, in the first, fourth, and eighth embodiments, the urging member changes the mounting position by the operator when the movable leg is rotated to the storage position side and when the movable leg is rotated to the stopper one position side. It was done. However, since the urging member only needs to have a function of urging the movable leg in the rotation direction, the urging direction changing means and method are not limited to the above-described embodiment. For example, the urging direction may be switched by a lever by applying a structure equivalent to the urging mechanism of the bicycle side stand to the movable leg of this embodiment.

  The present invention is widely applicable to lifting devices.

1: Lifting device 3: Lever member 3a: Operation unit 3b: Lifting unit 5A: Front movable leg 5B: Rear movable leg 5C: Movable leg 12: Stopper member 13: Front fixed leg 15: Rear fixed leg 17A: With front side Urging member 17B: rear urging member 17C: urging member 101: lifting device 201: lifting device FL: floor surface W: luggage

Claims (6)

A lever member having an operating portion and a lifting portion;
A movable leg that is rotatably provided at the lifting portion, and is rotatable between a storage position and a stopper position that extends downward from the storage position and stops the rotation;
An urging member for urging the movable leg in a rotation direction;
Lifting device with.   The lifting device according to claim 1, wherein the movable leg extends obliquely downward in a direction in which the lever member extends with respect to a floor surface at the stopper position.   The lifting device according to claim 1, further comprising a fixed leg that is shorter than the movable leg and provided on a side opposite to the operation part with respect to the movable leg. The lifting portion has a pair of lifting portions separated in a direction intersecting with a direction in which the lever member extends,
The lifting device according to claim 1, wherein the movable legs are a pair of movable legs respectively provided in the pair of lifting portions. The lifting device according to claim 4 , wherein the biasing members are a pair of biasing members that bias the pair of movable legs in the rotation direction. A lever member having an operating portion and a lifting portion;
In the lifting portion, a pair of movable legs disposed side by side in the extending direction of the lever member and provided so as to be rotatable,
A pair of urging members for urging the pair of movable legs in the direction of rotation;
With
Each movable leg is rotatable between a storage position and a stopper position that extends downward from the storage position and stops the rotation.
Lifting device.

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