JP3217896U - Work desk for electric motor inspection and maintenance work - Google Patents

Abstract

A work desk is provided that can reduce the burden on workers in the inspection and maintenance work of an electric motor. A work desk (1) includes a roller conveyor (3) installed on a horizontal and flat table (2), a support structure (4) that supports the table (2) at a predetermined height from the floor surface, and the roller conveyor (3) horizontally. A movable table 5 that can be moved back and forth by human power in a direction, a rotating table 6 that is disposed on the movable table 5 and that can be rotated manually around a vertical rotation axis that passes through the center point of the movable table 5, and a roller conveyor. 3 and a pair of portal suspensions 7 disposed opposite to both ends. [Selection] Figure 1

Description

  The present invention relates to a work desk used by an operator when performing a work of reassembling after pulling out a rotor from an electric motor and carrying out a service work (hereinafter referred to as a service work).

  In factories equipped with various production facilities and transportation facilities, a large number of electric motors are used. If those electric motors break down during the operation of the factory, a situation in which the operation is greatly adversely affected (for example, the smooth operation of the production line is impaired, the transportation of parts and products stays, etc.) is caused.

  Therefore, in order to minimize the impact on operation, spare parts of the electric motor are stored, and when the electric motor in use at the production facility or transport facility fails, the electric motor is replaced with a spare part. Therefore, measures are taken to operate the factory. The electric motor removed from the production facility and the transportation facility is stored as a spare part after performing inspection and maintenance work offline.

  Alternatively, if spare parts of the failed electric motor are not stored, the inspection and maintenance work is performed with the operation of the equipment stopped.

  In the inspection and maintenance work, it is necessary to remove the rotor from the electric motor. However, since the electric motor is heavy (about 50 to 500 kg), if the worker works in an unreasonable posture, it may cause back pain or injury. There is a fear. In addition to removing the rotor, it is necessary for the worker to move around the work desk on which the electric motor is placed according to the work content, so it is difficult to perform inspection and maintenance work in a narrow space, And physical fatigue increases.

  In order to reduce the load in such inspection and maintenance work, various techniques have been studied conventionally.

  For example, Patent Document 1 discloses a disassembly and assembly apparatus that can suspend a rotor and remove it from a stator by a pulley traveling on a rail. In this disassembly / assembly apparatus, the suspended rotor is moved by the pulley, so that the rotor is likely to shake during the extraction operation (that is, during the movement of the rotor). When the rotor is greatly shaken, it contacts the stator and causes deformation and damage of the rotor and / or the stator. Although the operator can prevent the rotor from shaking by pulling out while holding the rotor, the load on the worker in the inspection and maintenance work cannot be reduced.

  Further, the disassembly and assembly apparatus disclosed in Patent Document 1 is not provided with moving means, and is used by being fixed to a floor surface. Therefore, in order to carry out inspection and maintenance work, it is necessary to transport the heavy electric motor to the disassembly and assembly apparatus.

  In other words, a technique for reducing the burden on workers in the inspection and maintenance work of the electric motor has not yet been established.

No. 6-9569

  An object of the present invention is to provide a work desk that can solve the problems of the conventional technology and reduce the load on workers in the inspection and maintenance work of an electric motor.

  The present inventor examined a technique for preventing the rotor from shaking during the rotor pull-out operation. And we paid attention to the fact that the cause of the shaking is that the rotor is suspended and moved. In other words, in order to extract the rotor, it is necessary to hold it using a lifting tool so that the rotor does not come into contact with the stator, but by holding the rotor without moving it, Can prevent shaking.

  Next, in order to extract the rotor from the stator, the stator is moved while the rotor is stationary. In this way, the rotor can be extracted from the stator, and since the rotor does not shake, there is no need for the operator to hold down the rotor.

The present invention has been made based on such knowledge.
In other words, the present invention is a work desk used by workers for inspection and maintenance work of an electric motor, and supports a roller conveyor installed on a horizontal and flat table, and the table at a predetermined height from the floor surface. Support structure, a movable base that can be reciprocated manually on a roller conveyor in the horizontal direction, and can be rotated manually around a vertical rotation axis that is arranged on the movable base and passes through the center point of the movable base. A work desk having a rotary table and a pair of gate-type suspensions arranged opposite to both ends of the roller conveyor.

  In the work desk of the present invention, a moving means for moving the support structure to a predetermined position on the floor surface, a fixing means for fixing the support structure body at a predetermined position on the floor surface to prevent movement, And switching means for selecting and using either the moving means or the fixing means.

  According to the present invention, it is possible to reduce the burden on the worker in the inspection and maintenance work of the electric motor, and it is possible to perform the inspection and maintenance work even in a relatively small place, so that it has a remarkable industrial effect.

It is a perspective view which shows typically the example of the work desk of this invention.

  As shown in FIG. 1, in the work desk 1 of the present invention, a horizontal and flat table 2 is supported at a predetermined height from a floor surface (not shown) by a support structure 4. The height of the table 2 is not particularly limited, and is set as appropriate according to the environment in which inspection and maintenance work is performed. That is, the height of the table 2 is set in accordance with the situation of each workplace, such as when an operator performs an inspection / maintenance work while sitting on a chair, or when performing an inspection / maintenance operation in a standing posture.

  A roller conveyor 3 is installed on the upper surface of the table 2. The movable table 5 freely moves in the horizontal direction on the roller conveyor 3. In the example shown in FIG. 1, the reciprocating motion is performed in the lateral direction (that is, both the left and right directions). However, the movable table 5 is not provided with a driving force source, and an operator moves it on the roller conveyor 3 by human power. When the movable platform 5 on the roller conveyor 3 is moved, the load on the worker is extremely light.

  A turntable 6 is rotatably disposed on the upper surface of the movable table 5. The rotation axis of the turntable 6 is a vertical rotation axis that passes through the center point of the upper surface of the movable table 5. Accordingly, the turntable 6 rotates in a plane parallel to the table 2 (that is, horizontal). The operator also rotates the turntable 6 manually. By attaching a bearing (not shown) or the like to a portion where friction occurs during rotation, the load for rotating the turntable 6 can be greatly reduced.

  When performing inspection and maintenance work on the electric motor, the electric motor (not shown) is placed on the turntable 6. An operator moves the movable base 5 or rotates the turntable 6 according to various work contents (for example, removal or attachment of various parts) in the inspection and maintenance work. Thus, the worker can perform the inspection and maintenance work while sitting or standing in a certain place. That is, it is not necessary for the worker to move around the work desk, which contributes to reducing the load.

  Moreover, since the worker does not move around the work desk, there is no need for a space therefor. As a result, it is possible to perform inspection and maintenance work even in a relatively small place. For example, the work desk can be brought into contact with the wall of the building to perform inspection and maintenance work on the electric motor.

  When extracting the rotor, a pair of gate-type hanger 7 disposed opposite to both ends of the roller conveyor 3 is used. The procedure will be described below.

  After placing the electric motor on the turntable 6 and removing the parts that obstruct the extraction work of the rotor, the turntable 6 is rotated so that the rotating shaft of the rotor and the conveying direction of the roller conveyor 3 are parallel to each other. To do. Next, the movable platform 5 is moved to one end of the roller conveyor 3, and the rotor is suspended from the stator using the portal hanger 7 on both sides. And the movable stand 5 is moved to the other end of the roller conveyor 3, and only a stator is moved. The moving direction of the stator is parallel to the rotation axis of the rotor. At this time, it is preferable to extend the rotating shaft of the rotor using a steel pipe or the like so that the wire of the portal hanger 7 does not hinder the movement of the movable base 5. That is, it is preferable to hold the rotor in a state where the wire of the portal hanger 7 is suspended vertically downward.

  In this way, the rotor can be extracted. In addition, since the rotor does not shake, contact between the rotor and the stator does not occur, and deformation and damage of the rotor and / or the stator can be prevented.

  During these operations, it is necessary to fix the work desk 1 at a predetermined position on the floor surface to prevent unnecessary movement. On the other hand, when a moving means (for example, a caster) is attached to the support structure 4 so as to move to a predetermined position on the floor surface, a heavy electric motor is placed on the work desk 1 (specifically In particular, it is preferable to be placed on the turntable 6) and transported to a place where inspection and maintenance work is performed. Alternatively, when the electric motor being used online breaks down, the work desk 1 can be moved to the vicinity of the electric motor to perform inspection and maintenance work.

  However, since it is necessary to prevent the work desk 1 from moving unexpectedly during the inspection and maintenance work, the fixing means for fixing at a predetermined position on the floor and either the moving means or the fixing means. It is preferable to attach the switching means for selecting and using to the support structure 4.

  In addition, it is preferable that the gate-type hanger 7 be detachable and disposed so that it can be attached or detached according to the work contents, because the worker can easily work.

  The electric motor was inspected and maintained 10 times using the work desk of the present invention. In both cases, the workers were able to sit on a chair and perform maintenance work. In addition, deformation and damage of all parts such as the rotor and the stator were not recognized.

DESCRIPTION OF SYMBOLS 1 Work desk 2 Table 3 Roller conveyor 4 Support structure 5 Movable stand 6 Rotating stand 7 Gate type lifting tool

Claims (2)

A work desk used by workers for inspection and maintenance work on electric motors,
A roller conveyor installed on a horizontal and flat table;
A support structure for supporting the table at a predetermined height from the floor surface;
A movable table that can be reciprocated manually on the roller conveyor in the horizontal direction;
A turntable that is arranged on the moveable table and that can be rotated manually around a vertical rotation axis that passes through a center point of the moveable table;
A pair of portal suspensions disposed opposite to both ends of the roller conveyor;
A work desk characterized by comprising: Moving means for moving the support structure to a predetermined position on the floor;
Fixing means for fixing the support structure at a predetermined position on the floor surface to prevent movement;
Switching means for selecting and using either the moving means or the fixing means;
The work desk according to claim 1, further comprising:

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