Fall prevention structure for high-voltage equipment

Abstract

To reduce a work load by boltless attachment and detachment, etc., while relaxing structural restrictions.SOLUTION: A draw-out type vacuum circuit breaker (1) includes a circuit breaker body (25) mounted on a truck (20) having a wheel (21), and a cradle (10) containing the circuit breaker body placed on a bottom plate (11), and a fall prevention tool (30) prevents the circuit breaker body from falling out of the cradle. The cradle includes a hole (18) formed in a guide (12) and penetrating vertically, and a pin (17) protruding upward from the bottom plate. The fall prevention tool includes a main body (31) arranged on the bottom plate and extending in a direction crossing a travel route (R) of the wheel, an insertion piece (32) formed in the main body and inserted into the hole from below, and an opening (33) formed in the main body and into which the pin can be inserted from the upper end.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a fall-off prevention structure for high-voltage equipment, and more particularly to a fall-off prevention structure for high-voltage equipment that can prevent a drawer-type high-voltage equipment body from falling off from a cradle. [Background technology]

[0002] Conventionally, draw-out type circuit breakers mounted on a cradle have been used as high-voltage equipment housed in panels such as switchboards. In such draw-out type circuit breakers, the circuit breaker body is mounted on a wheeled cart and can be pulled out to a disconnecting position, which is the open side of the switchboard, and is designed to disconnect from the main circuit on the switchboard side. In the disconnecting position, a fall-off prevention means is provided to prevent the circuit breaker from being easily pulled out of the panel. Known fall-off prevention means include a configuration in which a stopper is detachably fixed to the cradle via a bolt, and a configuration disclosed in Patent Document 1.

[0003] The fall-off prevention means in Patent Document 1 includes a plate-shaped stopper that rotates in contact with the main shaft that supports the wheel, and a pin that prevents the stopper from rotating. A fulcrum pin that serves as a fulcrum for rotation is fixed to the upper end of the stopper. The fulcrum pin passes through an elliptical through-hole in the guide, and a nut is fixed to the threaded portion of the fulcrum pin. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-135835 Summary of the Invention [Problem to be solved by the invention]

[0005] In a fall-off prevention means that uses a bolt to attach and detach the stopper, a tightening tool is required for attachment and detachment, which makes the work complicated and there is a problem that the bolt may fall off or be lost.Furthermore, the fall-off prevention means of Patent Document 1 has a problem in that it imposes significant structural restrictions, such as lengthening the wheel axle, forming an elliptical through-hole in the guide, and rotatably attaching the stopper with a nut having a fulcrum pin and a support plate.

[0006] The present invention has been made in consideration of these points, and one of its objects is to provide a fall-off prevention structure for high-voltage equipment that can be attached and detached without bolts, while alleviating structural constraints and reducing the workload. [Means for solving the problem]

[0007] The fall-off prevention structure for high-voltage equipment according to the present invention is a fall-off prevention structure for high-voltage equipment that includes a high-voltage equipment main body mounted on a carriage having wheels and a cradle that houses the high-voltage equipment main body while it is placed on a bottom plate, and that uses a fall-off prevention device to prevent the high-voltage equipment main body from falling off the cradle, wherein the cradle includes a guide located at a predetermined height from the bottom plate, a hole formed in the guide, and a pin that protrudes upward from the bottom plate, and the fall-off prevention device includes a main body portion that is disposed on the bottom plate and extends in a direction crossing the travel path of the wheels, an insertion piece portion that is formed in the main body portion and is inserted into the hole, and an opening portion that is formed in the main body portion and into which the pin can be inserted. The fall-off prevention tool allows the pin to be inserted into and removed from the opening by rotating the main body around the insertion piece or a position near the insertion piece while the insertion piece is inserted into the hole. It is characterized by: Furthermore, the anti-fall-out structure for high-voltage equipment of the present invention is a fall-out prevention structure for high-voltage equipment that uses a fall-out prevention device to prevent the high-voltage equipment main body from falling off from the cradle, for high-voltage equipment that includes a high-voltage equipment main body mounted on a wheeled cart and a cradle that houses the high-voltage equipment main body while it is placed on a bottom plate, and is characterized in that the cradle includes a guide located at a predetermined height from the bottom plate, a hole formed in the guide, and a pin that protrudes upward from the bottom plate, and the anti-fall-out device includes a main body portion that is disposed on the bottom plate and extends in a direction crossing the travel path of the wheels, an insertion piece portion formed in the main body portion and inserted into the hole, and an opening portion formed in the main body portion into which the pin can be inserted, and the main body portion has a crank-shaped portion midway in the extension direction, and the crank-shaped portion is positioned at a position that overlaps with the travel path of the wheels. Furthermore, the anti-fall-out structure for high-voltage equipment of the present invention is a fall-out prevention structure for high-voltage equipment that uses a fall-out prevention device to prevent the high-voltage equipment main body from falling off from the cradle, for high-voltage equipment that includes a high-voltage equipment main body mounted on a cart with wheels and a cradle that houses the high-voltage equipment main body while it is placed on a bottom plate, and is characterized in that the cradle includes a guide located at a predetermined height from the bottom plate, a hole formed in the guide, and a pin protruding upward from the bottom plate, and the anti-fall-out device includes a main body portion that is disposed on the bottom plate and extends in a direction crossing the travel path of the wheels, an insertion piece portion formed in the main body portion and inserted into the hole, and an opening formed in the main body portion into which the pin can be inserted, and the main body portion includes an angle-shaped portion that rises from near the position where the opening is formed, and the angle-shaped portion is positioned to overlap the travel path of the cart. Furthermore, the fall-off prevention structure for high-voltage equipment of the present invention is a fall-off prevention structure for high-voltage equipment that is used for high-voltage equipment comprising a high-voltage equipment main body mounted on a wheeled cart and a cradle that houses the high-voltage equipment main body while it is placed on a bottom plate, and that uses a fall-off prevention device to prevent the high-voltage equipment main body from falling off from the cradle, and is characterized in that the cradle comprises a guide located at a predetermined height from the bottom plate, a hole formed in the guide, and a pin protruding upward from the bottom plate, and the fall-off prevention device comprises a main body portion that is disposed on the bottom plate and extends in a direction crossing the travel path of the wheels, an insertion piece portion formed in the main body portion and inserted into the hole, and an opening formed in the main body portion through which the pin can be inserted, and the main body portion has a restricting end portion that is in contact with or positioned close to the underside of the guide when the insertion piece portion is inserted into the hole. Furthermore, the anti-fall-out structure for high-voltage equipment of the present invention is a fall-out prevention structure for high-voltage equipment that is used for high-voltage equipment comprising a high-voltage equipment main body mounted on a wheeled cart and a cradle that houses the high-voltage equipment main body while it is placed on a bottom plate, and that uses an anti-fall-out device to prevent the high-voltage equipment main body from falling off the cradle, and is characterized in that the cradle comprises a guide located at a predetermined height from the bottom plate, a hole formed in the guide, and a pin that protrudes upward from the bottom plate, and the anti-fall-out device comprises a main body portion that is disposed on the bottom plate and extends in a direction crossing the travel path of the wheels, an insertion piece portion formed in the main body portion that is inserted into the hole, and an opening formed in the main body portion through which the pin can be inserted, and the guide and the anti-fall-out device each have a through-hole through which a linear member can be inserted. [Effects of the Invention]

[0008] According to the present invention, a capsulator can be attached to and detached from a cradle manually without using tools. Specifically, to remove a capsulator from a cradle, with the insertion piece inserted into the hole in the cradle, lift the area near the opening of the main body with your fingertips, release the pin from the opening, and then operate the main body to remove the insertion piece from the hole. Furthermore, to attach a capsulator to a cradle, insert the insertion piece into the hole in the cradle from below, and then hold the main body to insert the opening into the pin. Thus, the capsulator of the present invention can be attached to and detached from a cradle easily and quickly without using bolts or bolt tools, thereby reducing the workload. Furthermore, the capsulator can be attached and detached without changing the configuration of the wheels or cart, by providing a minimal configuration of holes and pins in the cradle, thereby easing structural constraints. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a schematic perspective view of a draw-out type vacuum circuit breaker according to an embodiment; [Figure 2] 2A is a partial enlarged view of FIG. 1, and FIG. 2B is an enlarged view similar to FIG. 1, showing a state in the middle of attaching or detaching the fall-off prevention device to or from the cradle. [Figure 3] FIG. 3A is a plan view of the fall-off prevention device of the embodiment, FIG. 3B is a front view of the fall-off prevention device of the embodiment, and FIG. 3C is a left side view of the fall-off prevention device of the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] High-voltage equipment according to embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The present invention is not limited to the following embodiments and can be appropriately modified and implemented without departing from the spirit of the present invention. For the sake of convenience, some components may be omitted from the following drawings. Furthermore, in the following description, unless otherwise specified, "upper," "lower," "left," "right," "front," and "rear" refer to the directions indicated by arrows in each drawing. However, the orientation of each component is merely an example and can be changed to any orientation.

[0011] In the following, the high-voltage equipment according to the present invention will be described as being applied to a draw-out type vacuum circuit breaker. However, the application of the present invention is not limited to draw-out type vacuum circuit breakers, and can be changed as appropriate as long as it is high-voltage equipment. For example, the present invention can be applied to other draw-out type circuit breakers, switches, and disconnectors, such as draw-out type vacuum electromagnetic contactors.

[0012] Fig. 1 is a schematic perspective view of a draw-out type vacuum circuit breaker according to an embodiment. As shown in Fig. 1, the draw-out type vacuum circuit breaker 1 comprises a cradle 10, a carriage 20, a circuit breaker body (high voltage equipment body) 25, and a fall prevention device 30. The draw-out type vacuum circuit breaker 1 is used in a state where it is housed in front of a main circuit conductor 3 in a distribution panel (not shown), although this is not particularly limited.

[0013] The cradle 10 comprises a bottom plate 11, a pair of U-shaped guides 12 formed on both the left and right sides of the bottom plate 11, and a pair of left and right side walls 13 erected from the rear of each guide 12. An insulating bar 15 is stretched across the pair of left and right side walls 13, and the main circuit conductor 3 is supported in a predetermined position via this insulating bar 15. A bus bar (not shown) is connected to a terminal located on the rear side of the main circuit conductor 3.

[0014] The bogie 20 is placed on the bottom plate 11 of the cradle 10, and the circuit breaker body 25 is mounted on the bogie 20. In other words, the cradle 10 accommodates the circuit breaker body 25 in a state in which the circuit breaker body 25 is placed on the bottom plate 11 via the bogie 20.

[0015] The bogie 20 has wheels 21 on both the left and right sides (the wheel on the right side is not shown) and is provided to travel in the forward and backward directions on the bottom plate 11 of the cradle 10. A handle 26 is provided on the front of the circuit breaker body 25, and an operator grips and operates the handle 26 to move the circuit breaker body 25 mounted on the bogie 20 forward and backward. When the circuit breaker body 25 mounted on the bogie 20 is pushed rearward on the bottom plate 11, the circuit breaker body 25 is moved to an operating position where it is connected to the contacts of the main circuit conductors 3. When the circuit breaker body 25 mounted on the bogie 20 is pulled forward from this operating position, the circuit breaker body 25 is separated from the contacts of the main circuit conductors 3 and is disconnected, allowing maintenance work, etc., to be performed on the circuit breaker body 25.

[0016] Each guide 12 of the cradle 10 extends in the front-to-rear direction at a predetermined height from the bottom plate 11 and is located above the wheels 21 on the bottom plate 11 to prevent the wheels 21 from bouncing up when the cart 20 is running. The bottom plate 11 and each guide 12 are formed by bending a single metal plate. Each guide 12 includes side plates 12a that rise up and connect to the left and right ends of the bottom plate 11, and a guide plate 12b that connects to the upper ends of the side plates 12a and is located above the bottom plate 11 at a predetermined distance.

[0017] Pins 17 protruding upward are provided at two positions sandwiching the center in the left-right direction in an area near the front end of the bottom plate 11. Here, a lifter (not shown) that raises and lowers the circuit breaker body 25 mounted on the carriage 20 is used as a device for carrying the circuit breaker body 25 from outside the panel into the cradle 10. The lifter has a lift plate on which the circuit breaker body 25 mounted on the carriage 20 is placed, and each pin 17 is inserted into alignment holes formed in the lift plate. By inserting each pin 17 into such alignment holes, the relative position of the lift plate and the bottom plate 11 is fixed, and the circuit breaker body 25 can be carried into a predetermined position within the cradle 10.

[0018] A hole 18 penetrating in the vertical direction is formed at the boundary between the side plate 12a and the guide plate 12b in the region near the front end of each guide 12. A fall prevention device 30 is attached to the cradle 10 via the pin 17 and hole 18 on the left side.

[0019] Next, the configuration of the fall-off prevention device 30 will be described with reference to Figures 2 and 3. Figure 2A is a partial enlarged view of Figure 1, showing the fall-off prevention device 30 attached to the cradle 10. Figure 2B is an enlarged view similar to Figure 1, showing the fall-off prevention device in the middle of being attached to or detached from the cradle.

[0020] 2A, the fall prevention device 30 includes a main body 31 placed on the bottom plate 11, an insertion piece 32 formed in the main body 31 and inserted into the hole 18 from below, and an opening 33 formed in the main body 31 into which the upper end of the pin 17 can be inserted. Here, in Fig. 2A, the arrow indicated by the two-dot chain line represents the travel path R of the wheels 21 of the cart 20 traveling in the front-to-rear direction. The pins 17 and holes 18 used to attach the fall prevention device 30 are arranged on either side of this travel path R in the left-to-right direction.

[0021] In this embodiment, the fall prevention device 30 is formed by cutting, punching, and bending a single metal plate. The main body 31 is disposed so as to extend in the left-right direction, which is a direction crossing the travel path R of the wheel 21.

[0022] Fig. 3A is a plan view of the fall-off prevention device of the embodiment, Fig. 3B is a front view of the fall-off prevention device of the embodiment, and Fig. 3C is a left side view of the fall-off prevention device of the embodiment. As also shown in Fig. 3A and Fig. 3B, main body 31 includes crank-shaped portion 35, angle-shaped portion 36 formed on the right side of crank-shaped portion 35, and rising portion 37 formed on the left side of crank-shaped portion 35. Therefore, crank-shaped portion 35 forms the middle portion of main body 31 in the extension direction (left-right direction).

[0023] The crank-shaped portion 35 has a first horizontal surface portion 35a that is placed in surface contact with the upper surface of the bottom plate 11, and a second horizontal surface portion 35b that is disposed between the bottom plate 11 and the guide plate 12b of the guide 12. The crank-shaped portion 35 also has a first vertical surface portion 35c that extends between the left end of the first horizontal surface portion 35a and the right end of the second horizontal surface portion 35b.

[0024] The opening 33 described above is formed in the right region of the first horizontal surface portion 35a. Therefore, the periphery of the region where the opening 33 is formed in the main body portion 31 is provided so as to be in surface contact with the upper surface of the bottom plate 11. The opening 33 is formed in an opening shape that can receive the pin 17 with a slight gap therebetween, and in this embodiment, is formed in a circular hole shape.

[0025] The second horizontal surface portion 35b is disposed a predetermined distance above the bottom plate 11 and a predetermined distance below the guide plate 12b of the guide 12. Preferably, the second horizontal surface portion 35b is formed so as to be positioned midway between the bottom plate 11 and the guide plate 12b.

[0026] A through hole 35d is formed through the second horizontal surface portion 35b, and a through hole 12c is also formed in the guide plate 12b at a position generally above the through hole 35d. A linear member (not shown) can be inserted through each of the through holes 35d and 12c. By passing a linear member through each of the through holes 35d and 12c to form a loop, it is possible to prevent the fall-off prevention device 30 from becoming too detached or falling off the cradle 10. Various configurations can be used as the linear member, for example, a string, a band, a wire, or a chain.

[0027] The first vertical surface portion 35c is disposed at a position overlapping with the travel path R of the wheel 21. More specifically, when the fall-off prevention device 30 and the wheel 21 are viewed from the front, the position of the first vertical surface portion 35c is aligned with or substantially aligned with the center of the wheel 21 in the left-right direction (see FIG. 3B). Therefore, when the wheel 21 moves forward from the state shown in FIG. 2A and abuts against the main body 31, the front end of the wheel 21 abuts against the corner formed by the first vertical surface portion 35c and the second horizontal surface portion 35b.

[0028] The angled portion 36 rises from the first horizontal portion 35a near the position where the opening 33 is formed. The angled portion 36 includes a second vertical portion 36a extending upward from the right end of the first horizontal portion 35a, and a third horizontal portion 36b extending horizontally to the left from the upper end of the second vertical portion 36a.

[0029] The vertical length of the second vertical surface portion 36a is set so that the height position of the third horizontal surface portion 36b is higher than the second horizontal surface portion 35b. Therefore, the third horizontal surface portion 36b of the angle-shaped portion 36 is positioned so as to overlap with the travel path of the bogie 20, which is inside (to the right of) the travel path R of the wheels 21. The rear end position of the angle-shaped portion 36 is formed forward of the rear end position of the crank-shaped portion 35, and the difference in length between these rear ends is set to be the same as the difference in length between the front ends of the wheels 21 and the bogie 20. Therefore, as the bogie 20 moves forward, the wheels 21 come into contact with the crank-shaped portion 35, and at the same time, the bogie 20 comes into contact with the angle-shaped portion 36.

[0030] The rising portion 37 extends upward from the left end of the second horizontal surface portion 35b and is disposed along the inner surface of the side plate 12a of the guide 12. The above-described insertion piece 32 is formed to protrude upward from the upper end of the rising portion 37. The insertion piece 32 is formed to be smaller than the front-to-rear width of the rising portion 37 and is formed in the center of the rising portion 37 in the front-to-rear direction (see FIG. 3C). When the insertion piece 32 is inserted into the hole 18 formed in the guide 12, the upper end of the rising portion 37 contacts or is disposed adjacent to the lower surface of the guide plate 12b of the guide 12. Here, the upper end of the rising portion 37 is defined as a restricting end portion 37a, and the upward movement of the left region of the main body portion 31, including the rising portion 37, is restricted by the restricting end portion 37a and the guide plate 12b.

[0031] Next, the procedure for attaching and detaching the fall prevention device 30 to and from the cradle 10 will be described. When removing the fall prevention device 30 from the cradle 10, first, lift the third horizontal surface portion 36b with your fingertips from the state shown in FIG. 2A. By lifting it, the main body 31 is rotated around the insertion piece portion 32 or a position nearby, as shown in FIG. 2B, and the insertion state of the opening 33 relative to the pin 17 is released. In addition, the first horizontal surface portion 35a of the crank-shaped portion 35 is separated from the upper surface of the bottom plate 11.

[0032] In this state, the main body 31 is operated to be lowered entirely. This lowering operation causes the insertion piece 32 to come out of the hole 18, and the fall-off prevention device 30 is removed from the cradle 10.

[0033] When attaching the fall prevention device 30 to the cradle 10, the third horizontal surface portion 36b is tilted higher than the insertion piece 32, and the insertion piece 32 is inserted from the lower side of the hole 18 as shown in FIG. 2B. From this state, the main body 31 is rotated around the insertion piece 32 or a position nearby, so that the first horizontal surface portion 35a is placed on the top surface of the bottom plate 11. This rotation allows the opening 33 to be inserted into the pin 17, and the fall prevention device 30 is attached to the cradle 10 as shown in FIG. 2A.

[0034] When the capsulator 30 is attached to the cradle 10, the insertion piece 32 is inserted into the hole 18 of the guide 12, and the pin 17 is inserted into the opening 33 of the capsulator 30, restricting movement of the capsulator 30 in the front-rear and left-right directions. Furthermore, when the capsulator 30 is placed on the bottom plate 11, downward movement of the capsulator 30 is restricted, and when the restricting end 37a is in contact with or adjacent to the lower surface of the guide plate 12b, upward movement of the capsulator 30 is restricted. Therefore, the capsulator 30 is attached in a state where movement in the three orthogonal axial directions is restricted, and the attached state to the cradle 10 is maintained unless the above-mentioned intentional rotation operation is performed. Therefore, even if a force that vibrates the cradle 10 is applied, the capsulator 30 will not be accidentally removed, and the attached state can be stably maintained.

[0035] With the fall-off prevention device 30 attached to the cradle 10, the main body 31 is positioned on the bottom plate 11 at a predetermined height of the travel path R of the wheels 21 and the movement path of the carriage 20. Therefore, the fall-off prevention device 30 acts as a stopper when the circuit breaker main body 25 mounted on the carriage 20 tries to move forward, and the fall-off prevention device 30 can prevent the circuit breaker main body 25 from falling off the cradle 10.

[0036] As described above, according to the above embodiment, the fall-off prevention device 30 can be attached and detached to and from the cradle 10 by manual work without using bolts or bolt tools, as described above. This allows the fall-off prevention device 30 to be attached and detached easily and in a short time, reducing the workload.

[0037] Furthermore, when using the fall prevention device 30 of the above embodiment, it is not necessary to change the configuration of the wheels 21 or the carriage 20, and the existing pins 17 are used. Therefore, the configuration of the cradle 10 for using the fall prevention device 30 is limited to the holes 18 of the guides 12, and the configuration changes to the cradle 10, etc. can be minimized, easing the constraints on the configuration.

[0038] Furthermore, the fall prevention device 30 can be attached and detached by rotating the main body 31 around the insertion piece 32, which makes it possible to both simplify the attachment and detachment process and maintain the stability of the attached state of the fall prevention device 30.

[0039] In addition, since the anti-fall-off device 30 is attached via the pin 17 and hole 18 located on either side of the travel path R of the wheel 21, the anti-fall-off device 30 can exhibit good strength in restricting the forward movement of the wheel 21.

[0040] Furthermore, since the first vertical surface portion 35c of the crank-shaped portion 35 overlaps the travel path R of the wheel 21, the wheel 21 comes into contact with the highly rigid portion that is bent on both the upper and lower sides, which also provides good strength for restricting the forward movement of the wheel 21.

[0041] In addition, since the angle-shaped portion 36 overlaps the movement path of the carriage 20, it bends on both the upper and lower sides of the carriage 20 and abuts against highly rigid parts, thereby providing sufficient strength to restrict the forward movement of the carriage 20.

[0042] Furthermore, since the first horizontal surface portion 35a is in surface contact with the bottom plate 11, the state in which the main body portion 31 is placed on the bottom plate 11 can be maintained stably.

[0043] The embodiments of the present invention are not limited to the above-described embodiments, and may be variously changed (including in position and orientation), substituted, or modified without departing from the spirit and scope of the technical idea of ​​the present invention. Furthermore, if the technical idea of ​​the present invention can be realized in a different way due to technological advances or derived other technologies, it may be implemented using that method. Therefore, the claims cover all embodiments that may fall within the scope of the technical idea of ​​the present invention.

[0044] For example, the main body 31 is configured to include the crank-shaped portion 35, the angle-shaped portion 36, and the rising portion 37, but is not limited to this and various modifications are possible as long as the insertion piece 32 and the opening 33 are formed. For example, instead of the crank-shaped portion 35, the main body 31 may be formed in a shape that extends in a straight or curved direction from the base end of the rising portion 37 to the vicinity of the opening 33. Furthermore, the main body 31 may be configured such that the orientation of the third horizontal surface portion 36b of the angle-shaped portion 36 faces rightward, which is different from the embodiment, or the third horizontal surface portion 36b may be omitted.

[0045] In addition, although the case where the anti-fall device 30 is provided on the left side of the cradle 10 in accordance with the left wheel 21 of the trolley 20 has been described, the anti-fall device 30 may also be provided in accordance with both the left and right wheels 21 or only the right wheel 21.

[0046] Furthermore, the pin 17 is shared by the fall prevention tool 30 and the lifter, but a pin that is used only by the fall prevention tool 30 may be provided on the bottom plate 11.

[0047] In addition, in the above embodiment, the pin 17 and the hole 18 are arranged on either side of the travel path R in the left-right direction, but this is not limiting. Even if the pin 17 and the hole 18 are arranged without the travel path R being on either side, it is sufficient that the main body 31 has an area that extends in a direction crossing the travel path R. [Explanation of symbols]

[0048] 1: Draw-out type vacuum circuit breaker (high voltage equipment) 10: Cradle 11: Bottom plate 12: Guide 12c:Through hole 17: Pin 18: Hole 20: Cart 21 :Wheel 25: Circuit breaker body (high voltage equipment body) 30: Falling prevention device 31: Main body 32: Insertion piece 33: Opening 35: Crank-shaped part 35d:Through hole 36:Angle part 37a: Regulatory end R: Travel route

Claims

1. A high-voltage equipment fall-off prevention structure for high-voltage equipment, which includes a high-voltage equipment main body mounted on a carriage having wheels and a cradle that houses the high-voltage equipment main body while the high-voltage equipment main body is placed on a bottom plate, and which prevents the high-voltage equipment main body from falling off the cradle using a fall-off prevention device, the cradle includes a guide positioned at a predetermined height from the bottom plate, a hole formed in the guide, and a pin protruding upward from the bottom plate; The fall prevention device includes a main body portion disposed on the bottom plate and extending in a direction crossing the travel path of the wheel, an insertion piece portion formed in the main body portion and inserted into the hole, and an opening portion formed in the main body portion and into which the pin can be inserted, The fall-off prevention structure for high-voltage equipment is characterized in that, with the insertion piece portion inserted into the hole, the main body portion is rotated around the insertion piece portion or a position near the insertion piece portion, thereby making it possible to insert and remove the pin from the opening.

2. A high-voltage equipment fall-off prevention structure for high-voltage equipment, which includes a high-voltage equipment main body mounted on a carriage having wheels and a cradle that houses the high-voltage equipment main body while the high-voltage equipment main body is placed on a bottom plate, and which prevents the high-voltage equipment main body from falling off the cradle using a fall-off prevention device, the cradle includes a guide positioned at a predetermined height from the bottom plate, a hole formed in the guide, and a pin protruding upward from the bottom plate; The fall prevention device includes a main body portion disposed on the bottom plate and extending in a direction crossing the travel path of the wheel, an insertion piece portion formed in the main body portion and inserted into the hole, and an opening portion formed in the main body portion and into which the pin can be inserted, The main body portion has a crank-shaped portion at a middle portion in an extension direction, The crank-shaped portion is disposed at a position overlapping with the travel path of the wheel, thereby preventing the fall-off of high-voltage equipment.

3. A high-voltage equipment fall-off prevention structure for high-voltage equipment, which includes a high-voltage equipment main body mounted on a carriage having wheels and a cradle that houses the high-voltage equipment main body while the high-voltage equipment main body is placed on a bottom plate, and which prevents the high-voltage equipment main body from falling off the cradle using a fall-off prevention device, the cradle includes a guide positioned at a predetermined height from the bottom plate, a hole formed in the guide, and a pin protruding upward from the bottom plate; The fall prevention device includes a main body portion disposed on the bottom plate and extending in a direction crossing the travel path of the wheel, an insertion piece portion formed in the main body portion and inserted into the hole, and an opening portion formed in the main body portion and into which the pin can be inserted, the main body portion includes an angled portion rising from the vicinity of a position where the opening is formed, The angle-shaped portion is positioned so as to overlap with the travel path of the carriage, thereby preventing the equipment from falling off.

4. A high-voltage equipment fall-off prevention structure for high-voltage equipment, which includes a high-voltage equipment main body mounted on a carriage having wheels and a cradle that houses the high-voltage equipment main body while the high-voltage equipment main body is placed on a bottom plate, and which prevents the high-voltage equipment main body from falling off the cradle using a fall-off prevention device, the cradle includes a guide positioned at a predetermined height from the bottom plate, a hole formed in the guide, and a pin protruding upward from the bottom plate; The fall prevention device includes a main body portion disposed on the bottom plate and extending in a direction crossing the travel path of the wheel, an insertion piece portion formed in the main body portion and inserted into the hole, and an opening portion formed in the main body portion and into which the pin can be inserted, The main body portion has a restricting end portion that is in contact with or positioned adjacent to the underside of the guide when the insertion piece portion is inserted into the hole.

5. A high-voltage equipment fall-off prevention structure for high-voltage equipment, which includes a high-voltage equipment main body mounted on a carriage having wheels and a cradle that houses the high-voltage equipment main body while the high-voltage equipment main body is placed on a bottom plate, and which prevents the high-voltage equipment main body from falling off the cradle using a fall-off prevention device, the cradle includes a guide positioned at a predetermined height from the bottom plate, a hole formed in the guide, and a pin protruding upward from the bottom plate; The fall prevention device includes a main body portion disposed on the bottom plate and extending in a direction crossing the travel path of the wheel, an insertion piece portion formed in the main body portion and inserted into the hole, and an opening portion formed in the main body portion and into which the pin can be inserted, The guide and the fall-off prevention tool each have a through-hole through which a linear member can be inserted.

6. 6. The fall-off prevention structure for high-voltage equipment according to claim 1, wherein the hole and the pin are arranged on either side of a travel path of the wheel.

7. 7. The high-voltage equipment fall-off prevention structure according to claim 1, wherein the main body has a periphery where the opening is formed, and the periphery of the opening is in surface contact with the bottom plate.

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