JP2011223728A - Lever block pulley apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable apparatus capable of singly dealing with any cases regardless of a mounting situation of a mounting material and a size of a member supporting a gauge transformer by improving an existent gauge transformer simple exchange apparatus developed for facilitating mounting/exchanging work of the gauge transformer of a power company.SOLUTION: A gauge transformer (10) carried at a predetermined position inside a cubicle (20) is mounted so that a lever block pulley apparatus (1) including a lever block (2) and a chain (2b) is placed on a gauge transformer mounting member (21) like placing a saddle on a horse. After a load of the gauge transformer (10) is moved, the gauge transformer is horizontally moved while being suspended, and by operating the lever block (2) to veer out the chain (2b) long, the gauge transformer (10) can be pulled out onto a working floor surface (30) approximately obliquely regardless of a mounting situation of the mounting member (21). At the same time, an exchange apparatus is ensured which can perform exchanging/mounting work singly under all situations.

Description

  The present invention is an electric power company that is used for measuring the power supply and demand situation that is suspended from a mounting member inside a cubicle type high-voltage power receiving facility (hereinafter referred to as a cubicle) defined by the Japanese distribution board industry standard JISIA200. The present invention relates to an apparatus for facilitating the installation / replacement work of the instrument transformer.

  An instrument transformer is used for measuring the power supply and demand situation of consumers with high power consumption and high pressure in accordance with the Measurement Law, and is installed together with the start of use by the customer. Later it will need to be replaced.

  When installing an instrument transformer in a cubicle box, there is a requirement from electric power companies nationwide to ensure that the lower part of the instrument transformer is at least 1000 mm from the floor of the cubicle box. It is necessary to lift and support the cubicle dedicated mounting member.

  Cubicles are often installed on the rooftop floor for effective use of the building space, and are installed on the rooftop floor. Since the foundation is waterproofed, the top surface is about 500mm above the floor surface, and the power transformer for power supply and demand is required to be moved from the floor surface to the suspension support position in the cubicle while being lifted in an oblique direction. Is done.

  In addition, there is a strong demand for compact cubicles, and electrical equipment such as transformers and high-voltage capacitors may be installed in the lower part of instrument transformers, so work must be performed safely in a limited space.

  Instrument transformers are relatively heavy, 60kg to 100kg, but it is normal that heavy machinery cannot be used to install / replace instrument transformers at specified positions in the cubicle box. This work is done by several people using human power, lifting ropes or chain blocks. For this reason, there is a problem that the work space is limited and it is difficult to ensure safe work.

  On the other hand, as an apparatus for facilitating replacement of an instrument transformer, there is Patent Document 1, which is composed of a pair of parallel guide members and a plurality of suspension support units and movable units. The load on the transformer is temporarily transferred to the suspension support unit after being attached to the mounted mounting member, and then the suspension is re-hanged to the movable unit that moves horizontally on the rail of the guide member, and the transformer is moved to the tip of the guide member. It can be finally lowered to the work floor using the attached chain block, and when installing the transformer, the reverse procedure can be performed to suspend and support the transformer in place. This is an effective device only when the supporting hardware is suspended from the upper part of the cubicle by welding or the like, and when the transformer mounting member is fixed on another hardware member at the lower part. , The guide member is a problem that is obstructed by hardware members under the mounting member can not mount the guide member. Further, since the size of the mounting member of the instrument transformer varies depending on the manufacturer of the cubicle, it is necessary to prepare several types of replacement devices suitable for the size of the mounting member.

  Patent Document 2 consists of a rail that can be fitted with a pulley and hook at the tip, a carriage that moves on the rail, and a chain block that moves up and down the instrument transformer that is pulled out along with the carriage. The transformer can be pulled out of the cubicle box, and the transformer can be pulled down to the floor using a chain block. However, the mechanism of the chain switching device attached to the carriage is complicated and the weight increases. As it is, there is a problem that a large force is required from the operator for the switching operation of the switching device.

  Patent Document 3 is to provide a cubicle having a slide rail-like support material that can replace an instrument transformer, and does not provide a portable instrument transformer device replacement device.

Japanese Patent No. 3465166 JP-A-2005-336552 A cubicle equipped with a mounting device for an electricity transformer for power supply and demand (patent application filed by the applicant)

  The present invention has been made for the purpose of enabling the replacement work of the instrument transformer regardless of the mounting state of the mounting member for the instrument transformer of various cubicles, and minimizes the parts used. Therefore, it is possible to safely and reliably replace the heavy instrument transformer by establishing an easy-to-understand operation method. In addition, even in cubicles that have a small carry-out port and it is difficult to carry out an instrument transformer, it is easy for an operator to carry out an instrument transformer by using an auxiliary tool that can be easily mounted with a pull-out rail. Enables replacement work.

  According to the first aspect of the present invention, when the chain length is adjusted by operating the lever block when replacing the instrument transformer, the pulley is slid so that the tension of the chain is evenly supported on both sides. Therefore, it is possible to suppress the swing of the instrument transformer and to eliminate the risk of rollover and to prevent the chain from being damaged.

  In addition, by keeping the weight of the pulley device to 2.0 kg or less, it is easy to mount the instrument transformer on the mounting member, and even if the lever block is included, the weight is 3.2 kg or less and is portable. It is.

  According to the second aspect of the present invention, the mounting width of the lever block pulley device is set in accordance with the maximum width of the mounting member of the instrument transformer, which is 100 mm. By tightening the wing screw, the pulley device can be securely attached to the mounting member in a horseshoe shape, and even if the load of the instrument transformer becomes unbalanced, the pulley device will fall off the mounting member. The present invention can be used for all mounting members with one model.

  According to the third aspect of the present invention, it is possible to move horizontally without difficulty while keeping on the mounting member of the instrument transformer.

  According to the invention described in claim 4, after moving the pulley device to the end while carrying the instrument transformer on the mounting member, the lever transformer is operated to extend the chain for a long time so that the instrument transformer can be extended. Starts to descend, and by applying a slight human force to the outside of the cubicle door in a substantially oblique state, the instrument transformer can be pulled down to the work floor.

  According to the fifth aspect of the present invention, it is possible to easily attach the instrument transformer pull-out rail by attaching the auxiliary metal fittings to the front and rear of the pulley device, and the auxiliary metal fittings can freely attach the drawer rails. Since it can be adjusted, it is easy to support horizontally at the optimum height according to the carry-out door. Even when it is difficult to carry out, replacement work can be performed by using the pull-out rail.

  According to the present invention, the lever block pulley device is used in the replacement work of the instrument transformer suspended from the mounting member in the cubicle box regardless of the shape, size and mounting state of the mounting member itself. Thus, the replacement work can be performed in a simple work process, and the replacement work that has been performed by a plurality of people using a rope or chain block can be performed in a safer environment.

  Also, even if it is difficult to carry in and out of the instrument transformer with the lever block pulley alone due to the condition of the cubicle door that is the exit of the instrument transformer, the pull-out rail is attached using the attached auxiliary metal fittings. Since it can be easily installed, the instrument transformer can be replaced regardless of the state of the door using the moving trolley and the chain block that move on the rail.

  Furthermore, since the load of the instrument transformer, which is a heavy object, is operated through the lever block pulley device, the workability is improved without the need to support the heavy object directly by human power. The replacement work can be performed, so that significant labor saving and cost reduction can be achieved.

  The best mode for carrying out the present invention will be described below in detail with reference to the drawings.

  FIG. 1 to FIG. 4 are schematic views showing a method of pulling out an instrument transformer using the lever block pulley device of the present invention. FIG. 5 to FIG. 7 are schematic diagrams showing a replacement method and an operation method of the instrument transformer using the lever block pulley device. FIG. 8 is a schematic detail view of the lever block pulley device.

  FIG. 1 is a cross-sectional view showing a state in which an instrument transformer (10) is installed in a cubicle box (20). The instrument transformer (10) is an attached mounting bolt (11) dedicated to the transformer. ) And the attached mounting bracket (12). The instrument transformer mounting member (21) is suspended and supported. For the instrument transformer mounting member (21), steel materials of various sizes such as 100 mm × 100 mm or 100 mm × 50 mm are used, and the maximum width is 100 mm. The mounting method of the instrument transformer mounting member (21) is supported in such a manner that it is suspended from the steel material on the upper surface of the cubicle, or the transformer mounting member support member (22) is laid on the lower side as shown in the figure. Supported on it attached to.

  FIG. 2 is a schematic cross-sectional view showing a case where the load of the instrument transformer (10) is transferred using the lever block pulley device (1). First, on the instrument transformer attachment member (21). The lever block pulley device (1) is horse-ridden and the drop-off prevention bolt (1f) is fastened and fixed to prevent the pulley device (1) from falling off the mounting member (21). The chain (2b) of the block (2) is slidably mounted on the lever block pulley device (1), and the instrumental transformer is suspended by the annular rope (2a) attached to the chain block hook (2c) at the end of the chain. Lock the lower hook (10a), and thirdly, loosen the transformer-attached mounting bolt (11) to transfer the entire load of the instrument transformer (10) to the chain, and then attach the bolt (11) and the transformer. Remove the mounting bracket (12) When the lever block (2) is operated to extend the chain (2b), the chain (2b) freely slides on the pulley of the lever block pulley device (1) and the instrument transformer (10) is in a horizontal state. Descent while keeping

  FIG. 3 is a cross-sectional view showing a situation in which an appropriate gap is provided between the instrument transformer mounting member (21) and the instrument transformer (10) by transferring the full load to the lever block pulley device (1). is there.

  FIG. 4 is a cross-sectional view showing a state in which the instrument transformer (10) is moved to the end of the instrument transformer attachment member (21), and is a transfer roller (1d) of the lever block pulley device (1). ) Allows movement without resistance.

  FIG. 5 is a cross-sectional view showing a situation in which the instrument transformer (10) moved to the end of the instrument transformer attachment member (21) is pulled out substantially obliquely and lowered to the work floor (30). By operating the lever block (2) and extending the chain (2b) for a long time, the instrument transformer (10) starts to descend. By applying a slight human force to the instrument transformer (10), the instrument transformer is applied. (10) can be pulled down to the work floor (30).

  When the instrument transformer (10) is pulled out by the above method, the transformer mounting member support (22) mounted so as to lie on the cubicle (20) to support the instrument transformer mounting member (21). ) Does not hinder the replacement work. In addition, when newly attaching and replacing | exchanging, an instrument transformer (10) can be installed in a predetermined position by performing said reverse procedure.

  FIG. 6 is a cross-sectional view showing a situation in which the instrument transformer drawer rail (3) is mounted, and the drawer rail mounting auxiliary bracket (3a) is mounted at two positions before and after the lever block pulley device (1). The drawer rail mounting auxiliary bracket (3a) can adjust the mounting height of the drawer rail (3), so the drawer rail (3) can be installed at an appropriate position in consideration of the height of the carry-out door. While maintaining the level on the rail (3), keep it level. Also in this replacement method, the transformer mounting member support member (22) does not hinder the replacement work.

  FIG. 7 uses a pull-out rail mounting auxiliary bracket (3a), an instrument transformer pull-out rail (3), a trolley (3b) that freely travels within the pull-out rail, and a chain block (4) suspended from the trolley. The sectional view of the situation where it was lowered to the work floor (30) is shown, and the instrument transformer is attached to the trolley (3b) via the chain block (4). After the load of (10) is transferred to the trolley (3b), the instrument transformer (10) is pulled out of the cubicle (20), and the chain block (4) is operated with the trolley (3b) fixed at the planned lowering position. Thus, the instrument transformer (10) can be lowered to the work floor (30).

  Note that the instrument transformer pull-out rail (3) and the trolley (3b) that travels within the rail use general commercial products, and when newly installing or replacing, reverse the above procedure. Thus, it is the same that the instrument transformer (10) can be installed at a predetermined position.

  FIG. 8 is a schematic detailed view showing an embodiment of the lever block pulley device (1) according to the present invention. The lever block pulley device main body (1a) is provided with a chain receiving pulley (1b) at the upper portion. Is provided with a moving roller (1d), and both sides of the apparatus are provided with thumbscrew-type drop-off prevention bolts (1f).

It is the schematic which shows the attachment condition of the instrument transformer installed in the cubicle. It is sectional drawing which shows the method of performing after that the load of an instrument transformer using the pulley apparatus for lever blocks. It is sectional drawing which shows the condition after shifting all the loads to the pulley apparatus for lever blocks. It is sectional drawing which shows the condition which moved the instrument transformer to the edge part of the instrument transformer attachment member. It is sectional drawing which shows the condition which pulled the instrument transformer substantially diagonally and was lowered | hung to the work floor surface. It is sectional drawing which shows the condition which attached the rail for instrument transformer drawer. It is sectional drawing which shows the condition which lowered | hung the instrument transformer to the work floor surface using the rail for instrument transformer drawer. It is a schematic detail drawing of the pulley apparatus for lever blocks.

1 Pulley device for lever block 1a Pulley device body for lever block 1b Pulley for chain 1c Pulley shaft for chain 1d Roller for movement 1e Roller shaft for movement 1f Drop-off prevention bolt 2 Lever block 2a Ring rope 2b Chain 2c Lever block hook 3 Instrument Transformer drawer rail 3a Drawer rail mounting auxiliary bracket 3b Trolley 4 Chain block 5 Instrument transformer 10 Instrument transformer 10a Instrument transformer hanging hook 11 Transformer attachment bolt 12 Transformer attachment Metal fitting 20 Cubicle box 20a Cubicle door 21 Instrument transformer mounting member 22 Transformer mounting member support 30 Work floor 31 Cubicle foundation

Claims (5)

  It has a pulley part that is installed on a mounting member of an instrument transformer and smoothly slides the chain of the lever block, and evenly divides the load of the instrument transformer to horizontally support the transformer. A portable pulley block for lever blocks.   In order to prevent the instrument transformer from falling off the mounting member, it is equipped with a mechanism that tightens from the left and right so that the device can be mounted according to the size of the mounting member, and it can be attached to various members with one model. A pulley block for a lever block.   A lever block pulley device comprising: a moving roller capable of moving horizontally on a mounting member of an instrument transformer while supporting the instrument transformer.   After moving on the mounting member to the nearest end of the carry-out door, the instrument transformer is pulled out to the outside of the box called a cubicle by operating the lever block of the pulley device and lowered to the work floor. Pulley device for lever block, characterized in that it can be used.   In the case where it is difficult to pull out in a substantially oblique direction as defined in claim 4, an auxiliary metal fitting is provided that can be attached to the output rail of the instrument transformer, and the auxiliary metal fitting can be horizontally adjusted because the height of the attachment of the output rail can be adjusted freely. Lever block that is easy to support the rail, and that can transfer the load of the instrument transformer to the unloading rail and move it horizontally to the outside of the box that houses the instrument transformer. Pulley unit.