JP6721941B2 - Circuit breaker Local maintenance and inspection workbench - Google Patents

Description

The present invention relates to a circuit breaker on-site maintenance/inspection workbench used for work of circuit breaker testing and maintenance/inspection.

Conventionally, when performing a test or a maintenance inspection of a circuit breaker, it is often the case that the operator sits down and puts the circuit breaker on the floor. However, the work of performing a test or a maintenance inspection on a circuit breaker placed on the floor imposes an unreasonable posture on the operator for a long period of time, which is a heavy physical burden. Moreover, since the circuit breaker has a weight of 50 to 60 kg, it is difficult to lift and lower the circuit breaker.

On the other hand, as shown in Patent Document 1, the circuit breaker removed from the equipment may be placed on a workbench and then work such as testing and maintenance may be performed. In this case, the worker can work while sitting on a chair or the like.

Japanese Utility Model Publication No. 5-050911

However, the workbench described in Patent Document 1 cannot be disassembled, and is extremely inconvenient to carry when the workbench has to be carried to a work place on a higher floor by stairs, for example. Further, when the circuit breaker is placed on the workbench of Patent Document 1, the bottom surface of the circuit breaker becomes invisible, so that there is also a problem that the bottom surface side of the circuit breaker cannot be easily inspected.

The present invention has been made to solve such a problem, provides a circuit breaker on-site maintenance/inspection workbench that is convenient to transport and can improve the efficiency of test and maintenance/inspection of the circuit breaker. The purpose is to do.

In order to solve the above-mentioned problems, the circuit breaker local maintenance and inspection workbench according to the present invention is provided between a pair of columns and a pair of columns detachably attached to the vehicle having a universal wheel. A pair of support parts each having a support pipe and a workbench part detachably attached to the support pipe are provided, and a circuit breaker can be placed on the workbench part, and a work breaker is mounted on the workbench part. An opening is formed so that the bottom surface of the can be seen.

One end of the arm part is attached to the support column of at least one support part of the pair of support parts of the circuit breaker local maintenance and inspection work table according to the present invention, and the other end of the arm part is attached to and detached from the support column of the other support part. It may be possible to engage.

Further, an elastic body may be provided between the support pipe of the support part and the workbench part.
Furthermore, the thickness of the support pipe may be 2-3 mm.

Further, at least one of the trolley, the pair of support portions, and the workbench portion may be made of an aluminum material.

Further, the support pillar of the support portion may be detachably fixed to the carriage by knob bolts.

In addition, the workbench portion is provided with a pair of rail portions on which the wheels of the circuit breaker can be placed, and the side portions of the rail portions are provided with wheel removal prevention walls that project above the upper surface of the rail portions. May be.
Furthermore, a stopper that is provided so as to be able to contact the wheel of the circuit breaker and that restricts movement of the circuit breaker along the rail portion may be detachably attached to the wheel removal prevention wall.

According to the circuit breaker on-site maintenance/inspection work table of the present invention, the convenience of transportation can be improved, and the efficiency of the work of the circuit breaker test and maintenance/inspection can be improved.

It is a perspective view of the circuit breaker on-site maintenance and inspection work table according to Embodiment 1 of the present invention. It is a disassembled perspective view of the circuit breaker on-site maintenance inspection worktable shown in FIG. It is a figure which shows the junction part of the trolley|bogie and support part of the circuit breaker on-site maintenance inspection work table shown in FIG. It is a perspective view which shows the structure of the connection part of the support|pillar of the support part of the circuit breaker on-site maintenance inspection table and upper pipe shown in FIG. It is sectional drawing which shows the structure of the arm part attached to the support part of the circuit breaker on-site maintenance inspection table shown in FIG. FIG. 2 is a side view showing a state in which a circuit breaker is placed on a workbench portion of the circuit breaker local maintenance inspection workbench shown in FIG. 1. It is the figure which expanded the structure of a part of work table part of the circuit breaker local maintenance inspection work table shown in FIG. It is a perspective view of the worktable part of the circuit breaker local maintenance inspection workbench which concerns on Embodiment 2 of this invention. FIG. 9 is a front view showing a state in which the circuit breaker is placed on the workbench portion of the circuit breaker local maintenance inspection workbench shown in FIG. 8.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
Embodiment 1.
As shown in FIG. 1, a circuit breaker on-site maintenance and inspection workbench 100 includes a trolley 1, a pair of support portions 3 and 4 which are detachably attached to the trolley 1, and are provided to face each other, and a pair of support portions 3. , 4 on which the workbench 2 is placed. A circuit breaker A is placed on the workbench 2. The pair of support portions 3 and 4 are connected to each other via a pair of arm portions 35 and 45 provided so as to sandwich the circuit breaker A therebetween. Then, as shown in FIG. 2, the circuit breaker on-site maintenance and inspection workbench 100 can be disassembled into the carriage 1, the pair of support portions 3 and 4, and the workbench portion 2.
In the following description, as shown in FIG. 1, the side on which the arm portion 35 is provided is the front side F of the circuit breaker local maintenance and inspection workbench 100, and the side on which the arm portion 45 is provided is the back side. B.

The structure of the carriage 1 will be described with reference to FIGS.
The dolly 1 includes a pedestal 12 having a substantially square shape, a free wheel 11 attached to the four corners of the lower surface of the pedestal 12, and a pillar engaging portion 15 provided on the four corners of the upper surface of the pedestal 12. The universal wheel 11 can rotate 360 degrees in the horizontal direction. Therefore, the carriage 1 can be freely moved in the front-rear direction, the left-right direction, or the diagonal direction, and can be rotated on the spot to change the direction. In addition, as shown in FIG. 2, the base 12 has a frame member 12a that configures the four sides of the base 12 and three horizontal members 12b that are bridged in parallel with each other inside the frame member 12a. Here, since there is a space between the frame members 12a and the horizontal members 12b and between the frame members 12a, the weight of the base 12 is smaller than that of a square plate member having a similar size. It will be lighter. Further, each of the pillar engaging portions 15 is a fixed portion 15a fixed to the frame member 12a of the base 12, and a substantially cylindrical engagement tubular portion connected to the fixed portion 15a and extending in the vertical direction with respect to the base 12. 15b and. Further, a pillar fixing bolt hole 15c is formed in each of the engaging cylinder portions 15b (see FIG. 3).
Here, the base 12 and the pillar engaging portion 15 are made of an aluminum material.

Next, the structure of the support portion 3 will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the support portion 3 has a pair of columns 31 and 32 that are parallel to each other and a support pipe 33 that is bridged between the pair of columns 31 and 32. The support pipe 33 has a thickness t of 2.6 mm (see FIG. 7). Here, as shown in FIG. 3, the lower ends of the columns 31 and 32 are fitted into the engaging cylinder portions 15 b of the column engaging portions 15 of the carriage 1 and attached to the carriage 1. In addition, the pillar fixing knob bolt 14 is inserted into the pillar fixing bolt hole 15c of the engaging cylinder portion 15b of the pillar engaging portion 15. Then, the pillar fixing knob bolt 14 presses the pillars 31 and 32, and the pillars 31 and 32 are sandwiched between the pillar fixing knob bolt 14 and the inner peripheral surface of the engagement tubular portion 15b, so that the pillars 31 and 32 are separated. It is fixed to the trolley 1 via the pillar engaging portion 15. The columns 31 and 32 can be attached to and detached from the carriage 1 by tightening or loosening the column fixing knob bolts 14.

Further, as shown in FIG. 2, two reinforcing pipes 37 are obliquely attached between the support column 31 and the support pipe 33 and between the support column 32 and the support pipe 33, respectively. .. Further, on the upper side of the support pipe 33, an upper pipe 30 is provided which is bridged between the pair of support columns 31 and 32. Both ends of the upper pipe 30 are attached to the pair of support columns 31 and 32 via a substantially cylindrical connector 51, respectively. Since the upper pipe 30 is provided, the distance between the pair of columns 31 and 32 is kept constant. Further, one end of an arm portion 35 is connected to the support column 31 between the support pipe 33 and the upper pipe 30.
Here, the support columns 31 and 32, the support pipe 33, the arm portion 35, the reinforcing pipe 37, and the upper pipe 30 of the support portion 3 are formed of an aluminum material.

With reference to FIG. 4, a detailed structure of a connection portion between the support column 31 of the support portion 3 and the upper pipe 30 will be described.
A strip-shaped convex portion 31 a extending along the extension direction of the column 31 is formed on the column 31. One end of the connector 51 engages with the convex portion 31a and is slidable along the convex portion 31a. The end of the upper pipe 30 is inserted into the connector 51. Furthermore, a connector knob bolt 52 is attached to the side portion of the connector 51. Here, when the connector knob bolt 52 is turned in the tightening direction, the side portion of the connector 51 is deformed so as to be crushed by the tightening force of the connector knob bolt 52. As a result, the gripping force with which the connector 51 holds the convex portion 31a of the support column 31 increases, and the connector 51 cannot slide easily with respect to the support column 31. Further, the end of the upper pipe 30 is grasped so as to be tightened inside the connector 51, and cannot be easily removed from the connector 51. Therefore, by tightening the connector knob bolt 52, the upper pipe 30 is stably fixed to the support column 31. On the contrary, when the connector knob bolt 52 is turned in the loosening direction to weaken the tightening force, the gripping force by which the connector 51 clamps the convex portion 31a of the support column 31 becomes weak. This allows the connector 51 to be easily slid in the extension direction of the support column 31, that is, in the vertical direction.
Further, the connection portion between the support column 32 and the upper pipe 30 has the same structure as that shown in FIG.
Therefore, the upper pipe 30 is slidable with respect to the columns 31 and 32 with both ends inserted in the connector 51, and the vertical position can be adjusted appropriately. Further, since the connector knob bolt 52 can be manually tightened or loosened, the position of the upper pipe 30 can be easily adjusted without using a tool.

Next, a detailed structure of the arm portion 35 will be described with reference to FIG.
A mounting portion 34 having a substantially cylindrical shape is provided at one end of the arm portion 35, and the mounting portion 34 is fitted to the support pillar 31 of the support portion 3 with play, whereby the arm portion 35 is attached to the support pillar 31. It is mounted so that it can rotate. A hook 36 is attached to the other end of the arm 35. The hook 36 has a substantially semicircular recess that can be engaged with the support column 42 of the support 4. A hook side bolt hole 36a is formed in the hook 36, and a hook side knob bolt 38 is inserted in the hook side bolt hole 36a. Here, in order to fix the hook 36 of the arm portion 35 to the support post 42 of the support portion 4, the hook side knob bolt 38 inserted into the hook side bolt hole 36 a is screwed into contact with the support post 42. Then, the support column 42 is sandwiched between the hook-side knob bolt 38 and the hook 36, so that the arm portion 35 of the support portion 3 is fixed to the support column 42 of the support portion 4. Further, the hook side knob bolt 38 is connected to the arm portion 35 via a chain 39 to prevent loss. Further, the hook side knob bolt 38 does not require a tool for tightening, and the arm portion 35 can be fixed to the support column 42 only by manual work.

Here, the support portion 4 provided so as to face the support portion 3 also has the support columns 41 and 42 having the same structure as the support columns 31 and 32, the support pipe 33, the arm portion 35, the reinforcing pipe 37, and the upper pipe 30 of the support portion 3. The support pipe 43, the arm portion 45, the reinforcing pipe 47, and the upper pipe 40.
Further, since the connector 51 shown in FIG. 4 is provided between the upper pipe 40 and the columns 41 and 42, the upper pipe 40 slides in the vertical direction with respect to the columns 41 and 42, and is appropriately positioned. Can be adjusted.
Further, the arm portion 45 attached to the support column 41 of the support portion 4 also has an attachment portion 44 of the arm portion 35, an attachment portion 44 having the same structure as the hook 36 and the hook side knob bolt 38, a hook 46 and a hook side knob bolt 48. The hook 46 of the arm portion 45 detachably engages with the support column 32 of the support portion 3.

Next, a detailed structure of the workbench section 2 will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the workbench part 2 has workbench plate parts 21a and 21b which are a pair of elongated plate-shaped members extending in parallel with each other. Further, as shown in FIG. 2, a pair of rail portions 25a and 25b are placed on the upper surfaces of the pair of work base plate portions 21a and 21b, and the pair of rail portions 25a and 25b are paired with the work base plate portions. It is bridged so as to extend parallel to each other between 21a and 21b. Here, the space surrounded by the work base plate portions 21a and 21b and the rail portions 25a and 25b constitutes the opening portion 6. Further, engaging projections 22 are provided so as to project on the lower surfaces near both ends of each workbench plate portion 21a, 21b. Each engagement protrusion 22 is composed of a pair of plate pieces 22a and 22b provided so as to face each other. Two first derailing prevention walls 23, which are plate members having a substantially L-shaped cross section, are attached to the outer side portions of each of the pair of rail portions 25a and 25b. The upper end of the first wheel removal prevention wall 23 is bent toward the inside of the workbench 2, that is, the side on which the circuit breaker A is provided. Here, the first wheel removal preventing wall 23 provided on the front side is referred to as a front wheel removal preventing wall 23a. A stopper mounting hole 23b is formed in the front wheel removal prevention wall 23a. Further, two second wheel removal prevention walls 24, which are plate members having a substantially rectangular shape, are attached to the inner side portions of each of the pair of rail portions 25a and 25b. The first wheel removal preventing wall 23 and the second wheel removal preventing wall 24 are arranged so as to face each other, and are provided at positions corresponding to the work base plate portions 21a and 21b. The first wheel removal preventing wall 23 and the second wheel removal preventing wall 24 are provided so as to project upward from the upper surfaces of the rail portions 25a and 25b. The height of the upper end of the first wheel removal prevention wall 23 is higher than the height of the upper end of the second wheel removal prevention wall 24. Further, a wheel stopper 28 is provided so as to project from one end on the rear surface side B of the upper surface of each of the rail portions 25a and 25b.
The pair of work base plate portions 21a and 21b, the engagement protrusion 22, the pair of rail portions 25a and 25b, the first wheel removal prevention wall 23, and the second wheel removal prevention wall 24 are made of an aluminum material.

As shown by an arrow S in FIG. 6, the circuit breaker A is slid from the front side F toward the rear side B and placed on the workbench portion 2 of the circuit breaker on-site maintenance and inspection workbench 100. At this time, the wheels W of the circuit breaker A are placed on the pair of rail portions 25a and 25b. Then, the wheels W of the circuit breaker A moving on the rail portions 25a and 25b come into contact with the wheel stoppers 28 provided on the rear side B of the rail portions 25a and 25b to be positioned. At this time, as shown in FIG. 7, each of the four wheels W of the circuit breaker A is disposed between the first wheel removal preventing wall 23 and the second wheel removal preventing wall 24. Further, a stopper knob bolt 29 is inserted into the stopper mounting hole 23b of the front wheel removal prevention wall 23a. The screw portion 29a of the stopper knob bolt 29 inserted into the stopper mounting hole 23b projects toward the rail portion 25 and is arranged so that the wheel W on the front side F of the circuit breaker A can come into contact therewith. As a result, the slide movement of the circuit breaker A in the front-rear direction is restricted.
The stopper knob bolt 29 constitutes a stopper.

Further, as shown in FIG. 7, by fitting the support pipe 33 so as to be sandwiched between the pair of plate pieces 22a and 22b of the engaging protrusion 22, the workbench portion 2 and the support portion 3 can be attached and detached. Engage with. Further, as in the case of FIG. 7, when the support pipe 43 is fitted into the engagement protrusion 22, the workbench 2 and the support 4 are also detachably engaged.

Furthermore, as shown in FIG. 7, a rubber sheet 5 which is an elastic body is provided between the support pipe 33 and the workbench plate portion 21a. Similarly, the rubber sheets 5 are also provided between the support pipe 43 and the work base plate part 21a, between the support pipe 33 and the work base plate part 21b, and between the support pipe 43 and the work base plate part 21b. Shall be provided.

As described above, in the circuit breaker local maintenance and inspection workbench 100 according to this embodiment, the carriage 1, the pair of support portions 3 and 4, and the workbench portion 2 are assembled so as to be detachable from each other. It can be disassembled as shown in. Therefore, the disassembled parts can be carried by a plurality of people or can be carried in a plurality of times, and it is not necessary to carry the heavy circuit breaker on-site maintenance/inspection workbench 100 at once. Therefore, the convenience of carrying the circuit breaker on-site maintenance and inspection workbench 100 is improved.
Moreover, since the trolley|bogie 1 has the free wheel 11, it can be moved in any direction and can also be rotated on the spot and can change a direction. Therefore, the efficiency of the test and maintenance inspection of the circuit breaker A is improved.
Further, when the circuit breaker A is placed on the circuit breaker on-site maintenance/inspection work table 100 and no work is being performed, luggage or equipment can be placed on the table 12 and used as a trolley. Therefore, it is not necessary to separately prepare a trolley for work, and the number of equipment to be transported to the work site can be reduced.
Further, since the opening 6 is formed in the workbench portion 2, the bottom surface of the circuit breaker A can be visually recognized from below the workbench portion 2, further improving work efficiency.

Further, one ends of the arm portions 35 and 45 are attached to the columns 31 and 41 of the support portions 3 and 4, and the hooks 36 and 46 provided at the other ends of the arm portions 35 and 45 are respectively provided in the opposing support portions 4 and 4. Removably engage the three columns 42, 32. Thereby, the support parts 3 and 4 are connected via the arm parts 35 and 45, and the circuit breaker A can be more stably mounted on the circuit breaker field maintenance work table 100. When the circuit breaker A is tested or maintained and inspected, the energy of the electric spring (not shown) stored in the circuit breaker A may give a large impact to the circuit breaker on-site maintenance/inspection workbench 100. Therefore, by connecting the support portions 3 and 4 via the arm portions 35 and 45, the strength of the circuit breaker on-site maintenance and inspection workbench 100 is increased, and it is possible to withstand the shock generated in the circuit breaker A during work. Become.

A rubber sheet 5 is provided between the support pipes 33 and 43 and the workbench 2 in order to reduce the impact transmitted from the circuit breaker A to the supports 3 and 4 during the test or maintenance and inspection work. Further, the thickness t of the support pipes 33 and 43 is set to 2.6 mm, which is thicker than the thickness of a normal aluminum pipe, so that the structure is stronger against impact.
The thickness t of the support pipes 33 and 43 is not limited to 2.6 mm, and may be any thickness of 2 to 3 mm.

Further, since the trolley 1, the pair of supporting portions 3 and 4 and the workbench 2 are made of an aluminum material, it is possible to reduce the weight of the circuit breaker on-site maintenance/inspection workbench 100. The convenience of transportation and handling of the inspection workbench 100 is improved.
In this embodiment, only part of the carriage 1, the pair of support portions 3 and 4, and the worktable portion 2 may be made of an aluminum material.

The columns 31, 32, 41, 42 of the supporting portions 3, 4 are fixed to the carriage 1 by the column fixing knob bolts 14. As described above, by using the knob bolts for joining the members to each other, no tools are required, and the circuit breaker on-site maintenance/inspection workbench 100 can be assembled and disassembled smoothly. In addition, the amount of baggage to be transported to the work site can be reduced because no tools are required.

A first wheel removal preventing wall 23 and a second wheel removal preventing wall 24 that project upward from the upper surfaces of the rail portions 25a and 25b are provided on the side portions of the rail portions 25a and 25b. As a result, the wheels W of the circuit breaker A are prevented from being derailed from the rail portions 25a and 25b. Further, a stopper knob bolt 29, which is provided so as to be able to come into contact with the wheel W of the circuit breaker A, is detachably attached to the front wheel removal prevention wall 23a, and the stopper knob bolt 29 restricts movement of the circuit breaker A in the front-rear direction. You can Therefore, even if a strong impact occurs during the test work of the circuit breaker A, it is possible to prevent the wheel W of the circuit breaker A from being derailed or the position of the circuit breaker A unexpectedly moving due to the impact. Therefore, the circuit breaker A can be more stably positioned on the workbench 2.

Embodiment 2.
8 and 9 show the configuration of the workbench section 202 of the circuit breaker local maintenance and inspection workbench 200 according to the second embodiment of the present invention. Since the same reference numerals as those in FIGS. 1 to 7 are the same or similar components, detailed description thereof will be omitted.
As shown in FIG. 8, under the rail portions 25a and 25b of the workbench 202, a pair of plate-shaped workbench plate portions 221a, which project outward, are provided at positions corresponding to the front wheel slip prevention wall 23a. , 221b are provided. Engagement protrusions 222 are provided below the work table plates 221a and 221b, respectively. The engagement protrusion 222 has a plate piece 22a and an inner engagement plate piece 222b arranged inside the plate piece 22a. As shown in FIG. 9, support pipes 33 and 43 are fitted between the plate piece 22a and the inner engagement plate piece 222b. Further, the inner engagement plate piece 222b extends longer downward than the plate piece 22a. Further, the front work bench plate portion 210 is bridged between the pair of inner engagement plate pieces 222b. Both ends of the front work bench plate portion 210 are connected to the lower ends of the pair of inner engagement plate pieces 222b. As a result, the distance D1 from the bottom surface of the circuit breaker A to the upper surface of the front work bench plate portion 210 is wider than the distance D2 between the bottom surface of the circuit breaker A and the upper surface of the work bench plate portion 21b on the rear side B.
The work base plate portions 221a and 221b, the engagement protrusion 222, and the front work base plate portion 210 are also made of an aluminum material.

As described above, in the workbench portion 202 of the circuit breaker local maintenance and inspection workbench 200 according to the second embodiment, the front workbench plate portion 210 on the front side F is located below the workbench plate portion 21b on the rear side B. Deploy. As a result, the distance D1 from the bottom surface of the circuit breaker A to the upper surface of the front work bench plate portion 210 can be made wider. Therefore, the operator can easily check the state of the bottom surface of the circuit breaker A through the opening 6 from below the work table 202, and easily grasp the hand between the bottom surface of the circuit breaker A and the front work table plate 210. Since the tool can be inserted and the work can be performed, the work efficiency is further improved.

1 bogie, 2,202 workbench part, 3,4 support part, 5 rubber sheet (elastic body), 6 opening part, 11 universal wheel, 14 pillar fixing knob bolt, 23 first wheel removal prevention wall, 24 second Derailment prevention wall, 25a, 25b rail part, 29 stopper knob bolt (stopper), 31, 32, 41, 42 stanchion, 35, 45 arm part, 100, 200 circuit breaker on-site maintenance work table, A circuit breaker, W circuit breaker Wheels, t Support pipe thickness.

Claims (8)

A dolly with swivel wheels,
A pair of support parts, each of which has a pair of support columns detachably attached to the carriage, and a support pipe provided between the pair of support columns,
A workbench part detachably attached to the support pipe,
A circuit breaker on-site maintenance and inspection workbench in which a circuit breaker can be placed on the workbench, and an opening through which the bottom surface of the circuit breaker can be viewed is formed on the workbench. One end of an arm portion is attached to the pillar of at least one of the pair of supporting portions, and the other end of the arm portion detachably engages with the pillar of the other supporting portion. Breaker on-site maintenance and inspection workbench described in 1. The circuit breaker on-site maintenance and inspection workbench according to claim 1, wherein an elastic body is provided between the support pipe and the workbench portion. The circuit breaker on-site maintenance work table according to any one of claims 1 to 3, wherein the support pipe has a thickness of 2 to 3 mm. The circuit breaker local maintenance and inspection worktable according to claim 1, wherein at least one of the carriage, the pair of support portions, and the workbench portion is formed of an aluminum material. The circuit breaker on-site maintenance and inspection work table according to any one of claims 1 to 5, wherein the pillar is detachably fixed to the carriage by a knob bolt. The workbench is provided with a pair of rails on which the wheels of the circuit breaker can be placed,
The circuit breaker on-site maintenance and inspection work table according to any one of claims 1 to 6, wherein a derailment prevention wall that protrudes above an upper surface of the rail portion is provided on a side portion of the rail portion. The breaker according to claim 7, wherein a stopper that is provided so as to be able to contact the wheel of the circuit breaker and that restricts movement of the circuit breaker along the rail portion is detachably attached to the wheel removal prevention wall. On-site maintenance and inspection work table.

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