JP2017124902A - Cargo handling assistance device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cargo handling assistance device of which malfunction, which occurs by application of an external force to an operation part, is prevented.SOLUTION: A cargo handling assistance device which comprises a motor part, a control circuit part for controlling motion of the motor part, a connection support part for supporting the motor part and an operation part for executing an operation command, and which performs assistance for movement of a cargo handling object connected thereto via a rope. The connection support part has: a first connection part which is connected and fixed to the motor part; a second connection part which is connected and fixed to a stationery member; a strain part which is positioned between the first connection part and the second connection part, and is deformed by reception of a strain; and a strain detection element which is provided on the strain part. The operation part is so provided as to be isolated from the motor part, the first connection part and the strain part.SELECTED DRAWING: Figure 1

Description

The present invention relates to a cargo handling assistance device that assists a user's work when a cargo handling article is suspended and moved up and down as an example.

    2. Description of the Related Art Conventionally, factories that assemble industrial products use cargo handling machines that hang and move up and down heavy loads such as heavy tools, work equipment, products, and semi-finished products. Among them, cargo handling assistance devices that generate assistance so that a user can move a heavy cargo handling object up and down to an arbitrary height with a relatively light operating force are those using an air cylinder and those using a motor. It has been known.

  Those using an air cylinder are mainly of the arm type and require pressure air, so that an air compressor or the like is separately required, and a safety device when the air supply is cut off is required. In addition, if the cargo handling material with different weights is suspended, the degree of assistance will change due to the difference in the weight, so if you manually adjust the air pressure each time to correct this, the work efficiency will decrease and the cargo handling material will decrease. If an attempt is made to register the weight in the computer and perform the registration call, an electropneumatic regulator is used, so that the configuration including piping is complicated. (Patent Document 1)

  On the other hand, a device using a motor that does not require pressurized air is one in which a wire rope with a hook is wound around a rotating drum and this is rotated by the motor. Since only the vertical movement is performed in the configuration of the motor and the rotating drum, a combination of a mainspring spring attached to the rotating drum as auxiliary power is known. In the mainspring spring system, when the wire rope is pulled out by the user for a long time, the mainspring spring is elastically deformed and gradually applies a large torque to the rotating drum, which changes the user's feel. In this manner, a taper-shaped rotating drum is used.

JP 2013-256362 A Japanese Patent Laying-Open No. 2015-054762

  However, in the cargo handling assisting device disclosed in Patent Document 2, since the shape of the rotating drum around which the wire rope is wound is tapered, manufacturing it is costly compared to the conventional cylindrical shape. Another problem is the complexity of replacement work when the mainspring spring is damaged. Also, when handling cargoes with different weights, the mainspring spring must be handled by a single basic spring, so that there is a difference in the user's feeling of use and there is a risk that work efficiency will be reduced.

  In view of such a problem, the present inventors do not need pressure air supply, and although it is a simple part shape and mechanism, it can smoothly handle cargoes of various weights and is compact with an electric motor. A load handling assist device is under development, but depending on the structure and position of the operation unit with buttons for operation, etc., it may be affected by the pulling force of this operation unit or the force of pressing the operation button. Things sometimes moved. That is, there is a case in which the strain generating part provided for detecting the cargo handling object and the force for moving the cargo also detects a force applied to the operation part, thereby malfunctioning.

  The present invention has been made in view of the above problems, and provides, for example, a cargo handling assistance device that prevents a malfunction that occurs when an external force such as pulling an operation unit or pressing an operation button is received. Is the purpose.

In order to achieve the above object, the cargo handling assist device according to claim 1 is configured by a motor or a geared motor, and has a motor unit having a rotation output shaft,
A control circuit unit for controlling the operation of the motor unit;
A connection support unit that is mechanically connected to the motor unit and supports the motor unit;
An operation unit connected to the control circuit unit to issue an operation command;
A loading / unloading assisting device for assisting the movement of the loading / unloading object connected to the rotation output shaft via a rope,
The connection support is
A first connecting portion connected and fixed to the motor portion;
A second connection portion connected and fixed to the fixing member;
A strain generating portion that is between the first connection portion and the second connection portion and is deformed by receiving strain;
A strain detecting element provided in the strain generating portion to detect strain of the strain generating portion;
Have
The operation unit is configured to be separated from the motor unit, the first connection unit, and the strain generating unit.

  In order to achieve the above object, the cargo handling assisting device according to claim 2 is configured such that the operation portion is fixed to at least one of a part of the fixing member and a part of the second connection portion. Has been.

In order to achieve the above object, the cargo handling assist device according to claim 3 is configured such that at least one of the fixing member and the member connected and fixed to the fixing member is a part of the motor portion and the first connecting portion. And at least one of a part of the strain generating part.

In order to achieve the above object, the cargo handling assistance device according to claim 4 is configured such that the control circuit unit is directly or indirectly connected and fixed to at least one of the motor unit and the first connection unit. ing.

  According to the cargo handling assistance device of the first aspect of the present invention, since the operation unit is provided separately from the motor unit, the first connection unit, and the strain generation unit, the operation unit operates to the strain generation unit. Therefore, it is possible to prevent malfunction.

  According to the cargo handling assist device of the invention described in claim 2, in addition to the above-described effect, the operation portion is separated from the motor portion, the first connection portion, and the strain generation portion, and a part of the fixing member and the second Since it is fixed to at least one part of the connection portion, malfunction can be prevented.

  According to the cargo handling assist device of the invention described in claim 3, in addition to the above effect, at least one of the part of the fixing member and the part of the second connection part is the part of the motor part, the first connection part. By covering at least one of the part and part of the strain generating part, it is possible to prevent external force from being applied to the motor part, the first connection part and the strain generating part, and to prevent malfunction.

According to the cargo handling assist device of the invention described in claim 4, in addition to the above effects, a compact cargo handling assist device can be realized.

1 is an external perspective view of a cargo handling assistance device according to a first embodiment of the present invention. The partial cross section structure figure of the cargo handling assistance apparatus by the 1st Embodiment of this invention The external appearance perspective view of the cargo handling assistance apparatus by the 2nd Embodiment of this invention External perspective view of conventional cargo handling assist device

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an appearance of a cargo handling assisting apparatus 1 according to a first embodiment of the present invention.

  A reduction gear that is mechanically connected and decelerates with a gear is attached to the load side of the motor unit 2 to reduce the rotational speed of the motor to a predetermined speed. On the other hand, a rotation angle detector and a brake are attached to the opposite load side. Here, a combination of a rotation angle detection unit, a brake, a motor, and a speed reducer is defined as a motor unit 2. Since these arrangement order and selection are appropriately determined depending on the purpose of use, for example, the rotation angle detection unit may be in the subsequent stage of the speed reducer, and various modifications are possible.

  Here, the rotation output shaft 3 is a rotation shaft decelerated by a reduction gear, and is connected to the rotation drum 18 to continuously rotate the rotation drum 18. The rotary output shaft 3 is rotatably supported by a bearing attached to the bracket 19. The motor casing on the side opposite to the load of the motor unit 2 is attached to the bracket 19.

    The rotary drum 18 is rotated by driving from the rotary output shaft 3 to feed out and wind the rope 6. The rope 6 is, for example, a metal wire rope and is wound around a rotary drum 18. One end of the rope 6 is fixed to the rotary drum 18, and the other end is connected to a cargo handling hook 8 for hanging a cargo handling object via a thimble. Yes.

  The bracket 19 is suspended by the fixing member 7 via a connection support portion 10 to be described later. The fixing member 7 is composed of a rotatable joint, a metal plate, or the like, and is connected to the apparatus hanging hook 9 to be entirely hung.

  A part of the fixing member 7 is extended to be a fixing member extending part 7a, and the operation part 4 is attached to the end. The operation unit 4 is electrically connected to the control circuit unit 17 by a flexible operation unit cable 16 wired along the fixed member extending portion 7a. The operation unit 4 has a plurality of operation buttons 5 for switching a mode for handling cargo handling and operating commands for manual operation.

  The control circuit unit 17 controls the operation of the cargo handling assisting device 1, and based on electric signals from the rotation angle detection unit of the motor unit 2, a strain detection element 14 described later, and the operation unit 4, the motor unit 2. A signal for controlling the motor is transmitted to the motor and fixed to the bracket 19. The fixed position is directly or indirectly connected and fixed to at least one of the motor unit 2 and the first connecting unit 11 described later, and is placed in the bracket 19 and arranged compactly.

  FIG. 2 is a partial cross-sectional structure diagram of the cargo handling assisting apparatus 1 according to the first embodiment of the present invention, and shows details of a region A cut along a cross section BB in FIG.

  The connection support portion 10 has a shape of a so-called columnar load cell, and the first connection portion 11 and the second connection portion 12 are sandwiched between a thin strain-generating portion 13 that is deformed by receiving a load. is there. A strain detection element 14 capable of detecting strain is attached to a surface perpendicular to the cylindrical axis of the strain generating portion 13. In this embodiment, a strain gauge is used for the strain detection element 14. In the present embodiment, the connection support portion 10 is defined to include the first connection portion 11, the second connection portion 12, the strain generation portion 13, and the strain detection element 14.

  The first connecting portion 11 is fixed to the bracket 19 with bolts. The first connecting portion 11 has a shape that is thicker and more rigid than the strain-generating portion 13 and is difficult to deform easily.

  The second connecting portion 12 is in contact with the fixing member 7 and is suspended by the fixing member 7. The second connecting portion 12d is also thicker and more rigid than the strain generating portion 13, and has a shape that is not easily deformed.

The fixing member 7 suspends the motor part 2 and the connection support part 10 as a whole, and this is not easily deformed.
The operation unit cable 16 is wired along the fixed member extending portion 7 a, passes through the opening of the bracket 19, and is connected to the control circuit unit 17 by the connector 20. The operation unit cable 16 is a flexible cable and is configured so that the influence of an external force applied to the operation unit 4 is not transmitted to the strain generating unit 13.

  With the above configuration, when a cargo handling object is suspended from the cargo handling hook 8, the rope 6 is pulled by the weight of the cargo handling article, so the cargo handling hook 8, the rope 6, the rotary drum 18, the rotary output shaft 3, and the motor unit 2 are used. Therefore, the bracket 19 is pulled downward, so that the first connecting portion 11 is also pulled downward, and the strain generating portion 13 is deformed. Based on the load signal from the strain detection element 14 of the strain generating unit 13 and the rotation angle signal from the rotation angle detection unit of the motor unit 2, the control circuit unit 17 controls the motor unit 2 to balance the cargo handling items. Control to assist. Of course, it is also possible to make a setting to balance after applying a slight external force to the cargo item and moving it.

  FIG. 3 shows an appearance of the cargo handling assisting apparatus 1 according to the second embodiment of the present invention. Here, since the parts other than the cover 15 are the same as those in the first embodiment, only the cover 15 will be described.

  The cover 15 is fixed to the fixing member 7 and generates a force other than the force related to the weight of the cargo handling or handling of the cargo handling and affects the load signal from the strain detecting element 14 of the strain generating portion 13, for example The motor unit 2, the connection support unit 10, the bracket 19 and the like are covered. The cover 15 does not necessarily need to cover the entire surface, and it is possible to prevent the application of external force by covering a necessary part by using a transparent material or appropriately making a hole so that the operation state can be confirmed. .

  Conventionally, in the cargo handling assistance device as shown in FIG. 4, the operation unit 4 is connected to the control circuit unit 17 via the bracket 19. In such a configuration, when the operation unit 4 is pulled downward or the operation button 5 is pressed, the bracket 19 and the control circuit unit 17 are pulled and eventually the force is transmitted to the first connection unit 11 to cause strain. A signal indicating that the load is increased from the strain detection element 14 due to the deformation of the portion 13 is output. Therefore, since it becomes the same as the load of the cargo handling object increasing, the control circuit unit 17 gives a command in the direction of lifting it. Even if an external force is directly applied to the bracket 19, the force is transmitted to the first connecting portion 11, so that the cargo handling object moves even though the cargo handling object is not intended to move. In general, since the cargo handling assisting device is often used while suspended at a high place, external force is not directly applied to the bracket 19, but the operation unit 4 is usually pushed or pulled. Therefore, it will malfunction.

  As described above, according to the present embodiment, the operation unit 4 is provided separately from the motor unit 2, the first connection unit 11, and the strain generation unit 13, and thus the external force applied to the operation unit 4 as described above. It is possible to prevent malfunction due to the influence of application of. Since the operation unit 4 only needs to be provided separately from the motor unit 2, the first connection unit 11, and the strain generation unit 13, the operation unit 4 includes a part of the fixing member 7 and the second connection unit 12. This can be realized by being fixed to at least one of the above, or by providing a receiving unit in the control circuit unit 17 and a transmitting unit in the operation unit 4 to communicate by radio or infrared.

  Further, at least one of the fixing member 7 and the member connected and fixed to the fixing member 7 is at least one of the motor part 2, the first connection part 11, and the strain generating part 13. By covering the two, it is possible to prevent external force from being applied to a part of the motor part 2, a part of the first connection part 11, and the strain generating part 13.

  As mentioned above, although embodiment regarding this invention was described, this invention is not limited to said embodiment, It can apply also to a connection support part as a flange type, and various deformation | transformation are possible. is there.

  As an application example of the present invention, it can be applied to a cargo handling assisting device that handles cargo handling.

DESCRIPTION OF SYMBOLS 1 Load handling assistance apparatus 2 Motor part 3 Rotation output shaft 4 Operation part 5 Operation button 6 Rope 7 Fixing member 7a Fixing member extending | stretching part 8 Hook for cargo handling 9 Hook for apparatus suspension 10 Connection support part 11 1st connection part 12 2nd Connecting portion 13 strain generating portion 14 strain detecting element 15 cover 16 operation portion cable 17 control board 18 rotating drum 19 bracket 20 connector

Claims (4)

A motor unit comprising a motor or a geared motor and having a rotation output shaft;
A control circuit unit for controlling the operation of the motor unit;
A connection support unit that is mechanically connected to the motor unit and supports the motor unit;
An operation unit connected to the control circuit unit to issue an operation command;
A loading / unloading assisting device for assisting movement of a loading / unloading object connected to the rotary output shaft via a rope,
The connection support part is
A first connecting portion connected and fixed to the motor portion;
A second connection portion connected and fixed to the fixing member;
A strain generating portion that is between the first connection portion and the second connection portion and is deformed by receiving strain;
A strain detecting element provided in the strain generating portion in order to detect strain of the strain generating portion;
Have
The cargo handling assisting device, wherein the operation unit is provided separately from the motor unit, the first connection unit, and the strain generating unit.   2. The cargo handling assist device according to claim 1, wherein the operation unit is fixed to at least one of a part of the fixing member and a part of the second connection unit.   At least one of the part of the fixing member and the member connected and fixed to the fixing member includes at least one of the part of the motor part, the part of the first connection part, and the part of the strain generating part. The cargo handling assisting device according to claim 1, wherein the cargo handling assisting device is covered. 4. The control circuit unit according to claim 1, wherein the control circuit unit is directly or indirectly connected and fixed to at least one of the motor unit and the first connection unit. 5. Material handling assist device.