JP2023128717A - Article raising/lowering device - Google Patents

Abstract

To provide an article raising/lowering device facilitating adjustment, maintenance, and the like.SOLUTION: An article raising/lowering device 1 includes a main body part 2 and a control part 10. The main body part 2 can be mounted on a structure and has a motor part 8 which is connected to a raising/lowering operation part 43 for raising/lowering an article. The control part 10 gives a command to the motor part 8 to raise/lower the article and is connected to the main body part 2 with connection members 53, 55. The connection members 53, 55 can relatively separate the control part 10 from the main body part 2 within a limited range in a horizontal direction.SELECTED DRAWING: Figure 5

Description

The present invention relates to an article lifting and lowering device that includes an electric motor and uses the electric motor to assist in the work of moving a suspended load up and down.

2. Description of the Related Art Conventionally, factories that assemble industrial products have used cargo handling equipment that lifts and moves heavy loads such as tools, work equipment, products, and semi-finished products. Among these cargo handling devices, some article lifting devices are used that generate assist force so that a user can move a heavy article up or down to a desired height with a light operating force. The article lifting and lowering device that generates assistance in this manner uses an electric motor to provide assistance and applies a small operating force (external force) to the suspended load to move it smoothly. Therefore, unlike the case where the vertical movement is simply performed using an electric motor, the load of the suspended load and the operating force applied thereto are detected by a load detection unit, and an external force is applied using an AC servo motor connected to a rotation angle detector. It is configured to perform control based on weight changes.

JP 2020-190475 Publication

In such a hanging type article lifting device (Patent Document 1), a motor part that provides assistance and a control part that controls the motor part are arranged with a hanging part suspended from a structure in the center. There is. A mounting board including a power supply circuit, a control circuit, an amplifier circuit, a wireless communication circuit, etc. is arranged in the control section, and a load detection section, a lifting operation section, etc. are arranged in the hanging section. While considering the drip-proof structure that enables use outdoors or in locations exposed to water droplets, there was room for improvement in the cover and internal structural arrangement to facilitate adjustment and maintenance of the article lifting device.

In view of such problems, an object of the present invention is to provide an article lifting and lowering device that is easy to adjust, maintain, and the like.

In order to achieve the above object, the article lifting device of the present invention has the following features:
An article lifting device including a main body and a control unit,
The main body part has a motor part that can be attached to a structure and is connected to a lifting operation part that raises and lowers the article,
The control section issues commands to the motor section to raise and lower the article, and is connected to the main body section by a connecting member,
The connecting member is configured to allow the control section and the main body section to be relatively separated within a limited range in the horizontal direction.

Further, the connecting member has a rotation axis, and the control unit is provided so as to be rotatable within a limited angular range around the rotation axis when the control unit and the main body are separated.

Further, the control unit is configured to be able to be disconnected by changing its relative position with the main body in a vertically upward direction.

In order to achieve the above object, the article lifting device of the present invention has the following features:
An article lifting and lowering device including a main body, a control unit, and a connecting member,
The main body part has a motor part that can be attached to a structure and is connected to a lifting operation part that raises and lowers the article,
The control unit issues commands to the motor unit to raise and lower the article,
The connecting member has a first connecting member fixed to the main body and a second connecting member fixed to the control unit,
The first connecting member and the second connecting member are configured to be slidably fitted so that the control section and the main body section can be relatively separated within a limited range in the horizontal direction.

According to the present invention, it is possible to provide an article lifting and lowering device that is easy to adjust, maintain, and the like.

1 is a perspective view of an article lifting and lowering device according to an embodiment of the present invention. FIG. 2 is a perspective configuration diagram of the inside of the main body of the article lifting and lowering device according to the embodiment of the present invention. FIG. 3 is a perspective view of the control section of the article lifting and lowering device according to the embodiment of the present invention separated from the main body section. FIG. 3 is a perspective view of the control section of the article lifting and lowering device according to the embodiment of the present invention separated from the main body section. FIG. 3 is a perspective view of the control section of the article lifting and lowering device according to the embodiment of the present invention separated from the main body section. FIG. 2 is a perspective view of the article lifting device according to the embodiment of the present invention, with the inside of the control section omitted and separated from the main body. FIG. 2 is a perspective view of the main body and the connecting member of the article lifting and lowering device according to the embodiment of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an article lifting device according to an embodiment of the present invention will be described in detail based on the drawings. FIG. 1 is a perspective view of an article lifting and lowering device 1 according to an embodiment of the present invention.

The article lifting and lowering device 1 includes a main body section 2 and a control section 10. The main body part 2 is a part in the plus y direction from the boundary line BL, and the control part 10 is a part in the minus y direction from the boundary line BL.

The main body portion 2 includes a motor portion 8 and the like. The main body 2 is covered with a motor cover 9, a main body cover (A) 51, and a main body cover (B) 52. A link chain 4 is suspended vertically downward from the lower surface of the main body 2, and the tip of the link chain 4 is connected to a hook 5 for hanging cargo. The article lifting/lowering device 1 is suspended from a structure or the like by a hanging hook 3 disposed on the top surface of a main body 2, and lifts and lowers a suspended load suspended from a hanging load hook 5.

The main body cover (A) 51 included in the main body 2 has a box shape with one side open, a hanging hook 3 is connected to the top side, and a link chain (sling part) 4 is connected to the bottom side. An entrance/exit is provided, and a link chain storage section 6 is suspended. A flat main body cover (B) 52 is provided so as to close the opening of the main body cover (A) 51. Therefore, the main body cover (B) 52 is arranged to be sandwiched between the main body cover (A) 51 and the control unit cover 11 that covers the control unit 10. On the other hand, the motor section cover 9 has heat radiation fins and is arranged on the motor section 8 side. Inside the main body cover (A) 51, a load detection section 31, a lifting operation section 43, etc. are housed. The load detection section 31 and the elevation operation section 43 will be described later with reference to FIG.

The link chain 4 is a sling portion in which oval rings consisting of semicircular arc portions and straight portions connected thereto are alternately connected at an angle of 90 degrees. One end of the link chain 4 is connected to a hanging load hook 5, and the other end (no-load side) is stored in a box-shaped link chain storage section 6. The hanging load hook 5 is a locking part that locks a hanging load, and has a hook shape, but is not limited to this, and can be applied in a form that matches the shape of the hanging load. Further, the sling portion is not limited to the link chain 4, but may be a wire or the like, and in this case, the link chain storage portion 6 is omitted and the lifting/lowering operation portion 43 is drum-shaped.

The remote control 7 can perform various operations of the article lifting device 1 using a plurality of buttons. The remote controller 7 wirelessly communicates with the control unit 10 and transmits a command signal for raising and lowering the article lifting device 1 .

The motor section 8 is connected to the lifting operation section 43 of the main body section 2, and rotates the lifting operation section 43 to wind up and pay out the link chain 4. The motor section 8 includes a motor and a speed reducer. The motor is, for example, an AC servo motor with a brake. The speed reducer is, for example, a wave gear speed reducer, which reduces the rotational speed of the motor to a predetermined speed. By using a reducer with extremely low backlash, such as a wave gear reducer, when the motor is frequently switched between forward and reverse rotations to perform assistance operations, uncontrollable areas at the time of switching are eliminated and smooth operation is achieved. A feeling of operation can be achieved. The output shaft that has been decelerated by the speed reducer is connected to the lift operation section 43, and the motor section 8 can continuously rotate the lift operation section 43 in forward and reverse directions.

The rotational position detector 35 is located on the opposite load side of the motor, detects the rotational angular position of the motor, and outputs a rotational angle signal, and is referred to as an encoder. In this embodiment, it is provided on the opposite load side of the motor, but it may also be provided near the lifting/lowering operation section 43 to detect the rotation angle after deceleration. The motor section 8 is covered by a motor section cover 9, and the motor section cover 9 has radiation fins and a cavity for wiring.

The control unit 10 includes a control board 12 that controls the article lifting device 1, and is equipped with a CPU (Central Processing Unit), memory, and the like. The control unit 10 also includes a communication board for communicating with the remote controller 7, a motor drive board for driving the motor, a power supply board for supplying power, and the like. Each circuit board of the control unit 10 is mounted within a control unit cover 11 for protecting these boards on which electrical and electronic components are mounted from the external environment. The control unit cover 11 is fixed to the main unit cover (B) 52 by six bolts B in this embodiment, and at the same time, it is kept airtight from the outside by a sealing material to prevent water droplets etc. from entering the inside of the control unit 10. is prevented.

FIG. 2 is a perspective view showing the internal structure of the main body section 2 of the article lifting/lowering device 1 according to the embodiment of the present invention.

A load detection section 31 disposed inside the main body section 2 is suspended from a hanging hook 3. Further, the load detection section 31 suspends the lifting operation section 43 via the main body cover (A) 51 and the main body cover (B) 52. The load detection section 31 has a strain-generating section that is elastically deformed, and detects the load applied to the lifting operation section 43 . A strain-sensitive resistor G is attached to this strain-generating portion, and is incorporated into, for example, a Wheatstone bridge circuit, so that the magnitude of strain can be output as an analog voltage based on a change in resistance value when strain is detected.

Vertically below the load detecting section 31, that is, in the minus z direction, there is an elevating operating section 43, and the elevating operating section 43 is covered with an elevating operating section cover 41 and a lid 42 (see FIG. 4). A wiring passage 41a is provided in the lift operation section cover 41, and serves as a passage for electrical wiring from the motor section 8. There are two wiring paths 41a, for example, one is used for wiring the motor system and the other is used for wiring the rotational position detector 35 system. The lifting/lowering operation section 43 is rotated by the drive from the motor section 8 to unwind and wind the link chain 4 . In this embodiment, the lifting/lowering operation part 43 has an outer shape of a cylinder with flanges on both sides, and is connected to the output shaft 34 of the reduction gear. The link chain 4 is fitted into a chain pocket provided on the cylindrical surface of the lifting/lowering operating section 43 and wound approximately 180 degrees.

Next, the operation of the article lifting device 1 using this load converter will be explained. With the configuration described above, when a load is hung on the load hook 5, the link chain 4 is pulled by the weight of the load, so the load hook 5, the link chain 4, the lifting operation part 43, and the main body The load detection section 31 is pulled downward via the section cover (A) 51 and the main body section cover (B) 52, and the strain-generating section of the load detection section 31 is deformed. Then, the strain-sensitive resistor G detects the strain generated in the strain-generating section, converts it into a weight signal at the amplifier circuit board 13 (see FIGS. 3 and 4), and sends it to the control board 12 of the control section 10. . The control unit 10 of the article lifting and lowering device 1 controls the motor unit 8 so that the registered weight of the hanging load stored in advance is equal to the weight received from the amplifier circuit board 13. In other words, the control unit 10 of the article lifting device 1 calculates a control value so that the tension in the link chain 4 caused by the registered weight is the same as the tension in the link chain 4 caused by the weight detected by the lifting actuation unit 43. to control the motor section 8.

If the operator applies a vertically downward external force to the suspended load during this control, the weight applied to the lifting actuator 43 will increase, so the control unit 10 calculates a control value to bring this closer to the registered weight, The motor unit 8 is controlled in the direction in which the link chain 4 is fed out, and the suspended load is lowered. On the other hand, if the worker applies a vertically upward external force to the suspended load during this control, the weight applied to the lifting actuator 43 becomes smaller, so the control unit 10 calculates the control value so that this becomes closer to the registered weight. , the motor unit 8 is controlled in a direction to wind up the link chain 4, and the suspended load is raised. When the operator stops applying external force, the weight detected by the load detection section 31 becomes equal to the registered weight, and the suspended load becomes stationary. Note that this control value includes, for example, acceleration.

FIG. 3 is a perspective view of the control section 10 of the article lifting/lowering device 1 according to the embodiment of the present invention separated from the main body section 2. As shown in FIG. In FIG. 1, when the six bolts B are removed, the control section 10 can move in the minus y direction with respect to the main body section 2 while maintaining the z direction. The moving distance is the maximum at L1. At this time, the amplifier circuit board 13 appears from the spaced gap.
The amplifier circuit board 13 is connected to a cable (not shown) drawn out from the load detection section 31, and amplifies the voltage analog signal and performs analog-to-digital conversion to generate a load digital signal. The cable is routed through a hole 60 provided in the main body cover (B) 52.

FIG. 4 is a perspective view of the control unit 10 of the article lifting and lowering device 1 according to the embodiment of the present invention rotated around the z-axis from the state shown in FIG. The details of the first connecting member 53 and the second connecting member 55 that connect the main body part 2 and the control part 10 in FIG. 4 are shown in FIG. 7, and will be explained with reference to FIGS. 4 and 7. .

The first connecting member 53 is fixed to the main body cover (B) 52 constituting the main body 2 with bolts b. The first connecting member 53 has a substantially U-shaped cross section when viewed in the plus y direction in FIG. 7, and is made by bending a metal plate. A hole for passing a fixing bolt is provided in the main body cover (B) 52 at one end in the y direction, and two protrusions extending in the minus x direction are provided at the other end. A pin 54a serving as a rotation axis on the protrusion 53a and a pin 54b serving as a rotation axis on the protrusion 53b are each fixed to the first connecting member 53 by caulking or screwing in the z direction.

On the other hand, the second connecting member 55 is fixed to the control section cover 11 constituting the control section 10 with bolts b (see FIG. 6). The second connecting member 55 has a substantially U-shaped cross section when viewed in the minus x direction in FIG. 7, and is made by bending a metal plate. A pair of grooves 55A each having a width W1 and a length L1 in the x direction are provided in a portion of the second connecting member 55 that faces each other and stands up in the plus y direction. W2 grooves 55B are provided in pairs. Note that the relationship here is width W1>width W2.

As shown in FIG. 7B, the pin 54a has a portion with a diameter d2 and a portion with a diameter d1 in order in the minus z direction from the portion caulked to the first connecting member 53. On the other hand, the pin 54b has a portion with a diameter d1, a portion with a diameter d2, and a portion with a diameter d1 in order from the portion caulked to the first connecting member 53 in the plus z direction.

The diameter d1 is set to be slightly smaller than the width W1 of the groove 55A, and the diameter d2 is set to be slightly smaller than the width W2 of the groove 55B. Therefore, when the control section 10 is attached to the main body section 2, the lower surface of the second connecting member 55 is in contact with the protrusion 53b, and the control section 10 and the main body section 2 are horizontally separated in the range L1 of the groove 55A. In the direction (y direction), the second connecting member 55 can be slidably moved. However, since the width W2 of the groove 55B is smaller than the diameter d1 of the pin 54a and the diameter d1 of the pin 54b, the control section 10 and the second connecting member 55 cannot move in the opening direction of the groove 55B. Further, when the control section 10 is attached to the main body section 2, the second connecting member 55 can rotate within a limited angular range around the pins 54a and 54b.

FIG. 5 is a perspective view of the control section 10 of the article lifting and lowering device according to the embodiment of the present invention separated from the main body section 2. As shown in FIG. The opening of the control section cover 11 faces the plus x direction. In this state, when the controller 10 is lifted in the plus z direction (vertically upward direction) to change its relative position with the main body 2 and the upper surface of the second connecting member 55 comes into contact with the protrusion 53a, the groove 55B Since the width W2 of the pin 54a is smaller than the diameter d2 of the pin 54a and the diameter d2 of the pin 54b, the controller 10 can move in the opening direction of the groove 55B (the y direction in FIG. 5 and the y direction in FIG. 7(a)). It becomes possible to attach and detach the part 2.

Note that a cable that is not shown in FIGS. 4 and 5 is connected from the amplifier circuit board 13 to the control unit 10, and a cable that exits from the motor unit 8 and the rotational position detector 35 through the wiring path 41a and connects to the control unit 10. It is connected to a connector provided on the board of the control unit 10. These cables may have a length that allows the control section 10 to be separated from the main body section 2 to the position shown in FIG. In this case, these cables need to be housed within the control section cover 11. Therefore, if there is not enough storage space for the cables inside the control unit cover 11, keep the connectors of these cables as the shortest length cables that can be connected and disconnected, and when making adjustments or maintenance, disconnect the wiring and connect the extension cables. It is also possible to insert it and use it at the position of the control section 10 shown in FIG.

According to the embodiment of the present invention, even if there is a part on the main body part 2 side that protrudes toward the control part 10 side, such as the amplifier circuit board 13, the control part 10 can be pulled out and rotated, allowing adjustment and maintenance. Excellent in sex. In other words, by using a connecting member that is capable of linear movement and rotation, rather than a simple hinge that only rotates, it can be used even if the gap between the fixed side member (main body part 2) and the rotating side member (control part 10) is small. , allowing for smooth separation. Therefore, the control section 10 can be exposed without removing the wiring cable from the main body section 2 side, making adjustment and maintenance easier.

Although the present invention has been described above based on the preferred embodiments, the present invention is not limited to the above-described embodiments, and various changes can be made without departing from the gist thereof.

As an example of the use of the present invention, it can be applied to an article lifting and lowering device that performs conveyance and assembly work by lifting and lowering operations.

1 : Article lifting device 2 : Main body part 3 : Hanging hook 4 : Link chain 5 : Hanging load hook 6 : Link chain storage part 7 : Remote control 8 : Motor part 9 : Motor part cover 10 : Control part 11 : Control part Cover 12: Control board 13: Amplification circuit board 31: Load detection section 34: Output shaft 35: Rotation position detector 41: Lifting operation section cover 41a: Wiring passage 42: Lid body 43: Lifting operation section 51: Main body cover ( A)
52: Main unit cover (B)
53: First connecting member 54a, 54b: Pin (rotating shaft)
55: Second connecting member 55A: Groove 55B: Groove 60: Hole

Claims (4)

An article lifting device including a main body and a control unit,
The main body part has a motor part that can be attached to a structure and is connected to a lifting operation part that raises and lowers the article,
The control unit instructs the motor unit to raise and lower the article, and is connected to the main body unit by a connecting member,
In the article lifting and lowering device, the connecting member allows the control section and the main body section to be relatively separated within a limited range in the horizontal direction. The article according to claim 1, wherein the connecting member has a rotation axis, and when the control unit and the main body are separated, the control unit is provided so as to be rotatable within a limited angular range around the rotation axis. lift device. The article lifting/lowering device according to claim 2, wherein the control section can be disconnected from the main body by changing its relative position with the main body in a vertically upward direction. An article lifting and lowering device including a main body, a control unit, and a connecting member,
The main body part has a motor part that can be attached to a structure and is connected to a lifting operation part that raises and lowers the article,
The control unit instructs the motor unit to raise and lower the article,
The connecting member has a first connecting member fixed to the main body portion and a second connecting member fixed to the control portion,
The first connecting member and the second connecting member are slidably connected to each other, so that the control section and the main body section can be relatively separated within a limited range in the horizontal direction.

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