JP2003104682A - Load moving auxiliary tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a load moving auxiliary tool allowing the safe and easy movement of a load using a crane device even in the situation where a load hanging hook cannot be moved into a position above the moving place in moving the load using the crane device such as an overhead crane. SOLUTION: This load moving auxiliary tool is provided with a load holding arm 10 suspended from a load hanging hook K2 of a crane device K and holding the load W in a position set away from a vertical line of the load hanging hook K2 ; a balancer 20 for maintaining the balanced state of the load holding arm 10 to hold the load W in a position separated from the vertically lower part of the load hanging hook K2 when hanging the load W through the load holding arm 10; and a control unit 30 for controlling the movement of the balancer 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a luggage movement assisting tool, and more particularly, to a luggage movement assisting tool that is preferably used in a building where an overhead crane is installed.

[0002]

2. Description of the Related Art As shown in FIG. 8, an overhead crane K is usually installed in a building 100 such as a factory. The overhead crane K is mainly used for moving a material W placed on a floor G. It is used.

By the way, in a factory, a plurality of shelves 10 are provided on a side wall 101 of a building 100 in order to effectively utilize the floor surface G thereof.
2 is provided, and the material W (hereinafter, referred to as luggage) is moved on the shelf board 102 to effectively use the floor surface G.

[0004]

However, a forklift has been used to load the luggage W placed on the floor G on the shelf plate 102. The reason for this is that the unloading hook K ₂ of the overhead crane K installed in the building 100 cannot move above the shelf board 102.

Usually, the overhead crane K is installed between brackets B protruding from both side walls 101 of the building 100, and the hoisting motor M of the unloading hook K ₂ uses the main body K ₁ of the overhead crane K as a traveling rail. The brackets B projecting from the both side walls 101 are freely movable.

However, since the moving range of the hoisting motor M is limited between the brackets B and the hoisting motor M is a relatively large device, the unloading hook K ₂ is provided on the side wall as shown in FIG. I couldn't stop by the last minute.

As described above, in the movement of the load using the overhead crane K, the load W can be moved to the vicinity of the side wall 101, but the load W is moved on the shelf plate 102 formed on the side wall 101. could not. Note that this type of problem is not limited to the overhead crane K, and can be applied to all crane devices that use the load lowering hook to move the load.

The present invention has been made in consideration of the above points, and when moving a load using a crane device, even if the load lowering hook cannot be moved above the moving position, the crane can be safely and easily used. An object of the present invention is to provide a luggage movement assisting tool that can move luggage using a device.

[0009]

In order to solve the above technical problems, the present invention has the following configuration. That is,
The present invention is a baggage movement assisting tool used when moving a load on a crane device, which is hung on a load unloading hook of the crane device, and loads the load at a position apart from a vertical line of the load unloading hook. Maintains the balance state of the load holding arm to be held and the load holding arm so that the load is held at a position apart from the vertically lower portion of the load lowering hook when the load is suspended through the load holding arm. And a posture maintaining means for performing the posture maintenance.

In the baggage movement assisting tool of the present invention thus constructed, the baggage holding arm holds the baggage. Further, in the normal state, the load is held at a position apart from the vertical line of the load lowering hook. In addition, "normal" here means
It means a state where no external force is applied to the luggage holding arm. In other words, it means a state in which the load is not suspended via the load holding arm. Further, the posture maintaining means maintains the balance state of the load holding arm so that the load is held at a position apart from the vertically lower portion of the load lowering hook when the load is suspended via the load holding arm.

That is, when the load is suspended, the posture (angle) of the load holding arm changes due to the weight of the load. Therefore, the posture maintaining means forcibly balances the postures of the luggage holding arms so that the luggage can be held at a position away from the vertically lower portion of the load lowering hook. In other words, the posture maintaining means maintains the posture of the luggage holding arm in the same posture when the luggage is suspended and in the normal state, and prevents the luggage from moving vertically below the luggage hook.

Therefore, by utilizing the distance to the place where the load is held, the load can be moved to the place where the load lowering hook cannot move, even at the place where the load is moved.

With respect to the posture maintaining means, the posture maintaining means includes a balance weight connected to the luggage holding arm, and a control device for moving the balance weight with respect to the luggage holding arm. When a load is applied to the luggage holding arm, the balance weight may be maintained by moving the balance weight away from the vertical line of the load lowering hook.

That is, in this configuration, a balance weight is provided as a balancer, and the control device moves the balance weight to balance the load and the balance weight and form the balance state of the load holding arm.

Regarding the movement of the balance weight, the posture maintaining means is provided with an angle detection sensor for detecting the posture of the luggage holding arm, and the control device causes the value obtained by the angle detection sensor to be a predetermined value. It may be configured to control the movement of the balance weight so as to achieve the above.

In this construction, the angle (posture) of the luggage holding arm is grasped by the angle detection sensor, and the movement of the balance weight is controlled so that the grasped angle becomes a predetermined value. That is, the balance state of the luggage holding arm is secured by feeding back the output of the angle detection sensor.

Further, regarding the holding of the load, the upper end surface of the load holding arm is a holding surface for the load, and the posture maintaining means is arranged so that the holding surface of the load is substantially horizontal to the ground. The balance state of the holding arm may be maintained.

In this structure, since the balance state of the luggage holding arm is formed at an angle where the upper end surface of the luggage holding arm is horizontal, it is possible to move the luggage while placing the luggage on the luggage holding arm.

The luggage holding arm has a claw portion extending in a horizontal direction to form a luggage holding portion, an arm body extending upward from a base end of the claw portion, and a tip of the arm body. The balance weight may be movably connected to the base end of the claw portion.

That is, the luggage holding arm has an L-shaped side cross section, and its claw portion forms a luggage holding portion.
The claw portion is preferably composed of a plurality of claws, but may be one. In this case, for example, a wire or the like is used to suspend the load on the claw portion to form the load holding state. The shape of the connecting portion provided at the tip of the arm body is not particularly limited as long as it can be connected to the load lowering hook.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of a luggage movement assisting tool according to the present invention will be described below with reference to the drawings.

In the present embodiment, the work of moving a load by an overhead crane will be described as an example, but the load moving assist tool according to the present invention will be described. It is not limited to. Further, the structure described below is merely an embodiment of the present invention, and the structure can be arbitrarily changed without departing from the scope of the claims.

The luggage movement assisting tool 1 shown in this embodiment is
As shown in FIG. 1, a luggage holding arm 10 having an L-shaped side section (an inverted L-shape in the drawing), a balancer 20 movably connected to a bent portion 10a of the luggage holding arm 10, and a The control unit 30 (control device) that controls the balancer 20 is provided.

As shown in FIG. 2, the load holding arm 10 includes a pair of claw portions 11 extending in the same direction, and an arm body 12 that rises upward from a base end T of the claw portions 11.
And, and the overhead crane K is attached to the tip of the arm body 12.
Connecting ring 13 (connecting part) that can be connected to the load unloading hook
Is provided.

The load W to be moved is held in a state of being placed on the upper end surface 11a of the claw portion 11 thereof. That is, when the load W is not suspended via the load holding arm 10, the load W is held at a position apart from the vertically downward position of the load lowering hook K ₂ in the overhead crane K. (See FIGS. 1 and 5). In the following, this state (posture) is referred to as the "normal state" of the luggage holding arm 10.

On the other hand, the balancer 20 has a balance weight 21 and a connecting arm 22 for connecting to the balance weight 21, and the balance weight 21 has a connecting arm 22.
It is movably connected to the bent portion 10a of the luggage holding arm 10 via. More specifically, the connection arm 22 and the load holding arm 10 are connected via a horizontally arranged rotary shaft 22a, and the balance weight 21 rotates in the up-down direction of the load holding arm 10 about the rotary shaft 22a. Has a structure (in the direction of arrows R ₁ and R _{2 in} FIG. 1).

The control unit 30 for controlling the balancer 20 is composed of an electric motor 31, a control device main body 30A and the like. The electric motor 31 is a DC motor that can obtain a sufficient driving torque, and is fixed to the upper part of the arm body 12 as shown in FIG. The electric motor 31 and the balance weight 21 are connected by a chain 32. When the chain 32 is wound up, the balance weight 21 approaches the arm body 12 (direction of arrow R _{1 in} FIG. 1), and conversely, when the chain 32 is loosened, the arm 32 is released. The balance weight 21 moves in a direction away from the main body 12 (direction of arrow R _{2 in} FIG. 1).

That is, by controlling the rotation direction and rotation amount of the electric motor 31, the relative positional relationship between the luggage holding arm 10 and the balance weight 21 can be arbitrarily adjusted.

On the other hand, as shown in FIG. 3, the control device body 30A includes a power supply unit 33 for supplying electric power to the electric motor 31, and an angle detection sensor 34 for detecting the posture (angle) of the luggage holding arm 10. And an attitude control unit 35 that determines the rotation direction and rotation amount of the electric motor 31 based on the output from the angle detection sensor 34.

The power supply unit 33 includes a plurality of electromagnetic relays (not shown), and supplies electric power supplied from the outside to the electric motor 31 in a desired conduction direction. Further, the angle detection sensor 34 includes a switching circuit S that moves according to the posture of the luggage holding arm 10 (see FIG. 4), and its output is processed in the posture control unit 35 and then a predetermined control signal is output. And is input to the power supply unit 33.

The switching circuit S will be described in detail. In the present embodiment, as shown in FIG. 4, a base plate S ₁ fixed to the arm body 12 and inclined integrally with the luggage holding arm 10, and the base plate S ₁ thereof. _1. A contact plate S ₂ that hangs from the upper part and slides on the base plate S ₁ as the luggage holding arm 10 tilts, and the position (contact point) of the contact plate S ₂ relative to the base plate S ₁ changes relative to the base plate S ₁ . Thus, the structure is such that the inclination of the luggage holding arm 10 is detected.

In this embodiment, a switching circuit S is used which detects the angle of the luggage holding arm 10 in the three areas A1, A2 and A3. That is, the first area A1 for detecting the forward inclination of the luggage holding arm 10,
Third region A for detecting the rearward inclination of the luggage holding arm 10
The posture of the luggage holding arm 10 is grasped by 3 and the second area A2 for detecting that the posture of the luggage holding arm 10 is kept in the normal state described above.

In FIG. 4, the claw portion 11 is located on the left side of the drawing.
If the contact plate S ₂ contacts the first area A _{1 on} the left side of the base plate S ₁ , it can be said that the luggage holding arm 10 is inclined forward. Further, if the contact plate S ₂ is in contact with the third area A3 on the right side of the drawing, it can be said that the luggage holding arm 10 is inclined rearward. Furthermore, if the contact plate S ₂ is in contact with the second area A2 sandwiched between the first area A1 and the third area A2, the normal state of the luggage holding arm 10, that is, the upper end surface 11a of the claw portion 11 is substantially in contact with the ground. It can be said that it is horizontal.

The reason why the second area A2 has a certain width here is that the hysteresis is provided between the first area A1 and the third area A3 which are adjacent to each other, so that the control system This is to suppress excessive response. That is, when the balance weight 21 moves, the load holding arm 10 shakes due to a response delay of the control system or the like.
Therefore, the second region A2 is provided with a certain width in order to avoid this shake, thereby preventing an excessive response in the attitude control of the luggage holding arm 10.

Next, the attitude control section 35 will be described. The attitude control unit 35 determines the rotation direction and the operation amount of the electric motor 31 based on the output from the angle detection sensor 34, and outputs a control signal corresponding to the determined items to the power supply unit 33. That is, the attitude control unit 3
In Fig. 5, by controlling the moving direction and the moving amount of the balance weight 21, when the luggage W is suspended via the luggage holding arm 10, the luggage W is located at a position apart from the vertically lower side of the cargo lowering hook K _2. Electric motor 3 so that
Control 1

The basic control carried out in the posture control unit 35 will be described. First, the posture control unit 35 reads the output of the angle detection sensor 34 and grasps the inclination direction of the luggage holding arm 10. Then, when the angle of the luggage holding arm 10 is inclined forward or backward, a control signal for moving the balance weight 21 is output to the power supply unit 33 to correct the inclination.

More specifically, when the forward inclination of the luggage holding arm 10 is detected, a control signal for moving the balance weight 21 away from the arm body 12 (direction of arrow R _{2 in} FIG. 1) is sent to the power supply unit 33. Output.

In the power supply unit 33, the attitude control unit 3
The electric motor 31 is rotated in the direction to loosen the chain 32 based on the control signal output from the motor 5. As a result, the balance weight 21 is separated from the arm body 12, and the posture of the luggage holding arm 10 is relatively inclined rearward. Therefore, the balance state of the luggage W and the balance weight 21 is formed, and the posture of the luggage holding arm 10 is maintained in the normal state.

After the posture of the luggage holding arm 10 is corrected, a control signal for stopping the movement of the balance weight 21 is output to the power supply unit 33. As a result, the movement of the balance weight 21 is stopped, and thereafter, the balance state of the luggage holding arm 10 is continued.

On the other hand, as shown in FIG. 5, when the load W is placed at the desired moving position of the load W, the load is released from the load holding arm 10, and this time the load is moved by the weight of the balance weight 21. The posture of the holding arm 10 is inclined rearward. Therefore, the angle detection sensor 34 detects the backward inclination of the luggage holding arm 10, and the attitude control unit 35.
Then, a control signal to the effect that the balance weight 21 is moved in the direction of approaching the arm body 12 (direction of arrow R _{1 in} FIG. 1) is output to the power supply unit 33.

Then, the power supply unit 33 receives the control signal and moves the electric motor 3 in the direction of winding the chain 32.
Rotate 1. As a result, the balance weight 21 approaches the arm body 12 and the posture of the luggage holding arm 10 is relatively inclined forward. Therefore, the posture of the luggage holding arm 10 is maintained in the normal state.

The weight distribution between the luggage holding arm 10 and the balancer 20 will now be described. The weight distribution is such that a balanced state is ensured only by the luggage movement assisting tool 1. Therefore, the luggage holding arm 1
When the load is released from above 0 and the balance weight 21 returns to the initial position, a balance state is formed only by the luggage movement assisting tool 1. Then, the next luggage W can be moved.

As described above, in the baggage movement assisting tool 1 according to the present embodiment, the balancer 20 and the control unit 30 form the posture maintaining means according to the present invention, and the balancer 20.
Since the posture of the load holding arm 10 is maintained by the movement of the (balance weight 21), when the load W is suspended via the load holding arm 10, the load is moved to a position apart from the vertically downward position of the load lowering hook K _2. W will be retained. Therefore, if the luggage W is moved by using the distance (L in FIG. 5) to the location where the luggage W is held, the cargo unloading hook K ₂ cannot move (for example, on the building side). Even on the shelf plate 102) formed on the wall surface 101, the luggage W can be moved to the moving place.

Although the posture control of the luggage holding arm 10 is performed by the feedback control based on the output from the angle detection sensor 34 in the above-described embodiment, the posture control of the luggage holding arm 10 is performed by the operator himself. It is also possible to adopt a device configuration capable of

In this case, as shown in FIG. 3, a hoist 36 (operation switch) or the like connected to the attitude control section 35 is provided, and the operator operates the hoist 36 by himself or herself. The amount of movement can be controlled. That is, in this structure, the balancer 20 and the hoist 36 for operating the balancer 20 and the like constitute the posture maintaining means.

The luggage holding arm 1 in this case
Explaining how to use 0, first, after the load W is placed on the load holding arm 10, the load movement assisting tool 1 is lifted up by several centimeters by the overhead crane K. Then, the operator operates the hoist 36 to operate the balance weight 21.
And the balance weight 21 is balanced with the luggage W. In addition, when the balance state is formed, the entire luggage movement assisting tool 1 is in a state of being lifted from the floor G.
Then, after confirming that the balanced state is formed, the luggage movement assisting tool 1 is moved to move the luggage W.

Regarding the movement of the luggage W, for example,
As shown in FIG. 6, the load W may be moved by suspending the load W on the claw portion 11 by using the wire Y or the like.

Further, in the above embodiment, the balance weight 21 is rotatable in the vertical direction of the luggage holding arm 10 in the configuration of the balancer 20 and the control unit 30, but this is not always necessary, and it is shown in FIG. Device for extending the traveling rail 21B of the balance weight 21A in a direction opposite to the extending direction of the pawl portion 11 as described above, and attaching the traveling unit 30B for reciprocating the balance weight 21A on the traveling rail 21B to the balance weight 21A itself. The function as the balancer 20 can also be achieved depending on the configuration and the like. Further, as the moving device of the balance weight 21, a hydraulic cylinder or the like may be used instead of the electric motor 31. That is, if the device configuration relating to the balancer 20 and the control unit 30 is a configuration capable of ensuring the balanced state of the luggage holding arm 10,
It can be changed arbitrarily.

In addition, the control unit 30 employs, for example, an angle detection sensor capable of continuously detecting the posture of the luggage holding arm 10 or has a built-in control circuit for adjusting the rotation speed of the electric motor 31. The configuration of the control unit 30 can be variously changed according to the specifications, such as incorporating a buzzer for notifying the balance state of the luggage movement assisting tool 1. Further, in the above, the output of the angle detection sensor 34 is fed back to control the posture of the luggage holding arm 10, but various changes can be considered as the control. Incidentally, if an angle detection sensor capable of continuously detecting an angle and a control circuit capable of adjusting the rotation speed of the electric motor 31 are built-in, the hoisting speed of the load lowering hook K ₂ and It becomes possible to control the attitude in consideration of the response delay of the control system. That is, with respect to the movement of the balance weight 21, it is possible to take the acceleration and the like into consideration.

[0050]

As described above, according to the present invention, when moving a load using a crane device such as an overhead crane, even if the load lowering hook cannot be moved above the moving position, the load can be safely and easily achieved. Luggage can be moved using a crane device.

[Brief description of drawings]

FIG. 1 is a side view of a luggage movement assisting tool according to the present embodiment.

FIG. 2 is a plan view of the luggage movement assisting tool according to the present embodiment.

FIG. 3 is a schematic configuration diagram of a control unit according to the present embodiment.

FIG. 4 is a schematic diagram of an angle detection sensor according to the present embodiment.

FIG. 5 is a view for explaining how to use the luggage movement assisting tool shown in the present embodiment.

FIG. 6 shows a luggage movement assisting tool according to the present embodiment,
Diagram for explaining the movement of luggage using wires

FIG. 7 is a modification of the balancer and control unit according to the present embodiment.

FIG. 8 is a view for explaining movement of luggage by an overhead crane that has been conventionally performed.

[Explanation of symbols]

1 Luggage Movement Aid 10 Luggage Holding Arm 10a Bent Part of Luggage Holding Arm 11 Claw 11a Upper End Surface of Claw 12 Arm Body 13 Connection Ring 20 Balancer 21 Balance Weight 21A Balance Weight 21B Traveling Rail 22 Connection Arm 22a Rotation Shaft 30 Control Unit 30A Control device body 30B Travel unit 31 Electric motor 32 Chain 33 Power supply unit 34 Angle detection sensor 35 Attitude control unit 36 Hoist (operation switch) 100 Building 101 Side wall 102 Shelf plate B Bracket G Floor K Overhead crane K ₁ Main unit K ₂ Unloading hook M Motor S Switching circuit S ₁ Base plate S ₂ Contact plate T Base end of claw Y Wire W Luggage (material)

Claims (5)

[Claims] 1. A baggage movement assisting tool used for moving a load by a crane device, the load being hung from a load lowering hook of the crane device, and being located at a position apart from a vertical line of the load lowering hook. And a luggage holding arm that holds the luggage holding arm, and a balance state of the luggage holding arm so that the luggage is held at a position apart from a vertically lower portion of the load lowering hook when the luggage is suspended via the luggage holding arm. A luggage movement assisting tool comprising: a posture maintaining means for maintaining the posture. 2. The posture maintaining means includes a balance weight connected to the luggage holding arm and a control device for moving the balance weight with respect to the luggage holding arm. The load transfer assist tool according to claim 1, wherein, during operation, the balance weight of the load holding arm is maintained by moving the balance weight away from a vertical line of the load lowering hook. 3. The posture maintaining means includes an angle detection sensor for detecting the posture of the luggage holding arm, and the control device controls the balance weight so that a value obtained by the angle detection sensor becomes a predetermined value. The baggage movement assisting tool according to claim 2, wherein movement of the baggage is controlled. 4. An upper end surface of the luggage holding arm serves as a luggage holding surface, and the posture maintaining means has a balance state of the luggage holding arm at an angle at which the luggage holding surface is substantially horizontal to the ground. The baggage movement assisting device according to any one of claims 1 to 3, characterized in that. 5. The luggage holding arm includes a claw portion that extends horizontally to form a luggage holding portion, an arm body that extends upward from a base end of the claw portion, and a tip of the arm body. And a connecting portion that is connectable to the load lowering hook, and the balance weight is movably connected to a base end of the claw portion. The baggage transfer aid described in.