JP5330301B2 - Bushing transport device - Google Patents

Description

  The present invention relates to a bushing transportation device attached to a transformer or the like, and more particularly to a highly versatile bushing transportation device having an impact mitigation function.

  A bushing transportation device attached to a conventional transformer or the like places a bushing on a pedestal made of wood or a material equivalent to it, a cloth or a space between the bushing and the pedestal, and a space around them. In many cases, an impact absorbing medium such as polyurethane is arranged and the whole is covered with a wooden box or a packing box made of a wooden box or the like.

  An example of such a bushing transport device will be described with reference to FIG. 7 (Patent Document 1). In FIG. 7, the bushing 3 is placed on a plurality of wooden or resin pedestals 1, and the whole is housed in a packing box 4, and an impact such as polyurethane is applied to the space between the bushing 3 and the packing box 4. It is transported by being filled with an absorption medium (not shown).

  In addition, the impact of the plastic deformation element and the introduction of the counterweight against the external impact that may occur during the transportation or handling of the bushing, without relying solely on the passive displacement inherent in the shock absorbing medium, It has been proposed to attach means to the bushing transport device to actively relieve the force.

  For example, means (Patent Document 2) for inserting a supporting device for preventing oscillation in the central conductor of the bushing (Patent Document 2), means for suppressing vibration by attaching a counterweight to one end of the bushing (Patent Document 3), the center of the bushing It has been proposed to hold a conductor with a support rod on which a cushioning material is mounted (Patent Document 4).

JP 2007-30934 A JP-A-10-275531 Japanese Utility Model Publication No. 62-26513 Japanese Patent Publication No. 3-263717

  In the conventional transportation apparatus as shown in Patent Document 1, the amount of displacement (sink depth) due to the impact force of the impact absorbing medium is small, and the excessive impact force generated by careless work during cargo handling and unloading, In addition, there is a high possibility of not having the ability to absorb excessive repetitive vibration during transportation. However, when a shock absorbing medium that allows a displacement amount (sink depth) that sufficiently absorbs the shock force is attached, there is a problem that the size of the transport device is increased.

  Also, without relying solely on the displacement inherent to the shock absorbing medium, the impact force can be reduced by reducing the impact force due to the resistance of the plastic deformation element, the structure receiving the impact force with a support rod having a comparatively low strength, and suppressing vibration. A technology to alleviate the impact force by introducing a counterweight has also been proposed, but in each case, the bushing itself must be provided with a structure that provides an impact mitigation function. It was lacking in versatility. Further, the counterweight needs to be adjusted in accordance with the natural vibration mode of the bushing in the center of gravity distance or the like, and this point is lacking in versatility.

  The present invention has been made in order to solve the above-described problems, and is small in size that can absorb excessive impact during loading, unloading and transportation without adding a new configuration to the bushing itself. It aims at providing a bushing transportation device with high versatility.

  In order to solve the above-mentioned problems, a bushing transporting apparatus according to the present invention includes a packaging box that accommodates a bushing therein, a receiving plate provided via an elastic body at the bottom of the bottom plate of the packaging box, and a bottom plate of the packaging box A shock absorbing bag attached between the base plate and the backing plate, a pedestal provided in the packing box on which the bushing is placed via the shock absorbing material, an acceleration sensor, and the grounding state of the backing plate In a bushing transport device having a sensor for detecting the pressure and a container in which a compressive fluid is sealed, the sensor detects a non-grounded state of the backing plate, and the acceleration sensor detects an acceleration exceeding a set value. The compressive fluid is supplied from the container to the shock absorbing bag.

  Further, the bushing transport device of the present invention includes a packing box that accommodates the bushing therein, a receiving plate that is provided on the bottom plate of the packing box via an elastic body, and the receiving plate that is attached to the bottom plate of the packing box. A stopper that is held at a predetermined interval, a pedestal that is provided in the packing box and on which a bushing is placed via an impact absorbing material, an acceleration sensor, and a sensor that detects the grounding or non-grounding state of the backing plate In the bushing transport device, the stopper is opened when the sensor detects an ungrounded state of the backing plate and the acceleration sensor detects an acceleration exceeding a set value.

  Further, the bushing transport device of the present invention includes a packing box that houses the bushing, a receiving plate provided at a lower portion of a bottom plate of the packing box, and a sliding plate that is attached to the receiving plate and extends slidably. A bushing transport device having a plurality of braking rods, a brake pad provided in the packaging box for braking the braking rod, and a pedestal on which the bushing is placed via an impact absorbing material. When the suspension is lifted, the brake rod is held in contact with the brake pad at a predetermined surface pressure.

  According to the present invention, it is possible to provide a compact and highly versatile bushing transport apparatus that can absorb excessive impact during loading, unloading and transportation without adding a new configuration to the bushing itself. it can.

1 is an overall configuration diagram of a bushing transport device according to a first embodiment of the present invention. The whole block diagram of the bushing transportation device concerning a 2nd embodiment of the present invention. The whole block diagram of the bushing transportation device concerning a 3rd embodiment of the present invention. The whole block diagram of the bushing transportation device concerning a 4th embodiment of the present invention. The whole block diagram of the bushing transportation device concerning a 5th embodiment of the present invention. Overall configuration diagram of a bushing transport device according to a sixth embodiment of the present invention (A), (b) is a whole block diagram of a conventional bushing transport device

Hereinafter, an embodiment of a bushing transportation device according to the present invention will be described with reference to the drawings.
(First embodiment)
The bushing transport apparatus according to the first embodiment will be described with reference to FIG.
In FIG. 1, the bushing transport device includes a pedestal 1 on which a bushing 3 is placed via an impact absorbing medium 2, a packaging box 4 that covers the whole, and an elastic body 15 below a bottom plate 4 a of the packaging box 4. It is comprised from the provided receiving plate 6, and the impact-absorbing bag 5 attached between the baseplate 4a and the receiving plate 6. FIG.

  A container 7 made of a cylinder filled with a compressible fluid such as air is installed in the packing box 4, and the shock absorbing bag 5 and the compressible fluid container 7 are connected to each other through a communication pipe 9 via an on-off valve 8. Connected. A sensor 10 is attached to the lower part of the packaging box 4, and the sensor 10 detects whether or not the receiving plate 6 is in contact with the ground.

  An acceleration sensor 11 is installed in the packaging box 4, and the sensor 10 and the acceleration sensor 11 are connected to the control box 13 by wiring 12. The control box 13 and the on-off valve 8 are connected by a wiring 14.

  When the backing plate 6 leaves the ground, that is, when the entire bushing cargo leaves the ground, the sensor 10 operates and the bushing cargo is lifted away from the ground. A signal indicating this is transmitted to the control box 13 via the wiring 12.

  On the other hand, the acceleration sensor 11 detects the acceleration applied to the cargo, and transmits a signal to the control box 13 via the wiring 12 when detecting an acceleration exceeding a set value close to the gravitational acceleration, for example. In the control box 13, when these signals are detected at the same time, that is, when an acceleration exceeding a set value is detected with the cargo leaving the ground, a signal for opening the on-off valve 8 is sent via the wiring 14. This is transmitted to the on-off valve 8.

  When the on-off valve 8 is opened, the compressed compressive fluid enclosed in the compressible fluid container 7 is instantaneously released into the shock absorbing bag 5 through the communication pipe 9, and the compressible fluid is released. Inflate instantly and prepare for subsequent collision with the ground.

  When the cargo collides with the ground, the inflated shock absorbing bag 5 exhibits an elastic deformation having a displacement that can receive the momentum of the impact with a sufficient impulse (time integral value of force), and the impact force is sufficient. Becomes smaller. On the other hand, when the shock absorbing bag 5 is not inflated, its size can be kept small, which contributes to the downsizing of the transport device.

  As described above, according to the first embodiment, excessive impact force generated at the time of cargo landing during unloading or unloading of bushing cargo during heavy handling or unloading, and may occur during transportation. A large impact force can be absorbed by the amount of displacement (sinking depth) of the inflated shock absorbing bag, and a compact and highly versatile bushing transport device can be provided without adding a new structure to the bushing itself. be able to.

(Second Embodiment)
A bushing transport device according to a second embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the structure same as the said embodiment, and the overlapping description is abbreviate | omitted.

  In the second embodiment, as an alternative to the function of the shock absorbing bag 5 in the first embodiment, a compressible elastic body 15 made of a spring or the like is attached between the bottom plate 4a of the packing box 4 and the receiving plate 6. It is done. The elastic body 15 is normally held in a compressed state by the stopper 16. The stopper 16 is configured to be operated by the operation mechanism 17 to lock or release the stopper 16. Further, the sensor 10, the acceleration sensor 11, and the control box 13 are connected by the wiring 12 as in the first embodiment, and the control box 13 and the operation mechanism 17 are connected by the wiring 18.

  In the second embodiment configured as described above, when the bottom surface of the receiving plate 6 leaves the ground, that is, when the entire bushing cargo leaves the ground, the sensor 10 operates and the cargo leaves the ground. In this state, for example, when an acceleration exceeding a set value close to the gravitational acceleration is detected, a signal for operating the operation mechanism 17 is transmitted from the control box 13 via the wiring 18.

  When the operation mechanism 17 operates, the stopper 16 is opened, and the elastic body 15 instantaneously shifts from the compressed state to the opened state. The released elastic body 15 exhibits an elastic deformation having a displacement enough to receive the momentum of impact with a sufficient impulse, and the impact force becomes sufficiently small. On the other hand, when the elastic body 15 is contracted, its size can be kept small, which contributes to the downsizing of the transport device.

  According to the second embodiment, the bushing cargo can be unloaded, the unloading of the bushing cargo during unloading, or the excessive impact force generated at the time of cargo landing in severe handling, and can be generated during transportation, It is possible to provide a bushing transport apparatus that is small and highly versatile without adding a new structure to the bushing itself.

(Third embodiment)
A bushing transport device according to a third embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the structure same as the said embodiment, and the overlapping description is abbreviate | omitted.

  In the third embodiment, an opening 19 is provided in the packaging box 4 of the first embodiment, an opening 20 is also provided in the shock absorbing bag 5, and the opening 19 and the opening 20 are connected to an on-off valve 21. The connection pipe 22 is used for connection. The on-off valve 21 is connected to the control box 13 by a wiring 23. The container 7 is filled with a compressive fluid made of a viscous fluid such as foamable gel. The control box 13 performs control so that the on-off valve 21 is instantly opened when the compressive fluid has been discharged into the shock absorbing bag 5.

  In the third embodiment configured as described above, the sensor 10 operates when the bottom surface of the backing plate 6 leaves the ground due to the same action as that of the first embodiment. In this state, the acceleration exceeding the set value is generated. When detected, the on-off valve 8 is opened, and the enclosed compressible fluid in the container 7 is instantaneously released into the shock absorbing bag 5 through the communication pipe 9.

  Next, when the enclosed compressible fluid has been discharged into the shock absorbing bag 5, the on-off valve 21 is opened instantly. In this state, when the cargo collides with the ground, the compressible fluid in the shock absorbing bag 5 is discharged from the opening 19 to the outside through the connecting pipe 22 as the shock absorbing bag 5 contracts. At this time, by appropriately adjusting the cross-sectional area of the connecting pipe 22, the pipe length, and the viscosity of the compressible fluid so that the acceleration value of the impact force at the beginning of the impact is less than the specified value, the contraction displacement of the shock absorbing bag 5 The momentum of impact is set so that it can be received with a sufficient impulse. This reduces the impact force and the impact acceleration does not change with elastic vibration. ) Can be suppressed.

  According to the third embodiment, an excessive impact force generated when a bushing cargo is unloaded or unloaded at the time of unloading or unloading the bushing cargo, or when the cargo lands during heavy handling, and there is a large possibility that it may occur during transportation. The impact force is absorbed by the amount of displacement of the inflated shock absorbing bag (sinking depth), and the vibration of the cargo after the collision can be suppressed, and it is compact without adding a new structure to the bushing itself. Thus, a highly versatile bushing transport device can be provided.

(Fourth embodiment)
A bushing transport device according to a fourth embodiment will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the structure same as the said embodiment, and the overlapping description is abbreviate | omitted.

  In the fourth embodiment, braking rods 24 are arranged at the four corners of the receiving plate 6 below the bottom plate 4 a of the packaging box 4. The brake rod 24 is slidably inserted into the packaging box 4 through holes formed in the four corners of the bottom plate 4a. Further, braking mechanisms 25 are arranged at the four corners of the packing box 4, and the braking rods 24 penetrate the braking mechanism 25. A brake pad 26 is provided on the brake mechanism 25 so as to contact the brake rod 24 or take a minute separation distance. The brake pad 26 is operated by an operation mechanism 27, and the contact pressure of the brake pad 26 and the separation distance are provided. It has a structure that can be adjusted. Further, the operation mechanism 27 is connected to the control box 13 by a wiring 28.

  In the fourth embodiment configured as described above, the receiving plate 6 is located close to the bottom plate 4a of the packaging box 4 when installed on the ground in a normal state. At this time, the brake pad 26 is not in contact with the brake rod 24. When the bushing cargo is lifted, the sensor 10 notifies the control box 13 that the cargo has left the ground. At the same time, the receiving plate 6 falls downward due to its own weight. At this time, the brake rod 24 does not move away from the bushing cargo by the action of the upper end portion of the brake rod 24, and the sliding range is stopped at the maximum position, and the lifting work is performed at that position.

  At the same time that the brake rod 24 stops at the position where the sliding range is maximum, the control box 13 issues a command to the operating mechanism 27 so that the brake pad 26 contacts the brake rod 24 with a specified surface pressure. When the cargo collides with the ground, the frictional force between the brake pad 26 and the braking rod 24 can be controlled so that the impact force does not exceed the specified value.

  According to the fourth embodiment, when the impact force changes in proportion to the displacement as in the elastic vibration in the first and second embodiments, or the impact force is changed as in the third embodiment. The average momentum absorption capacity (impulse density) per unit displacement can be made higher than when changing in proportion to the impact velocity or proportional to the square. Due to this effect, it is possible to suppress the movement displacement due to the impact, and it is possible to further reduce the size of the transport device as compared with the first to third embodiments.

Here, the required motion displacement (required subduction depth) ymax [m] in each embodiment will be compared below with a simple consideration.
Elapsed time t [sec] from the collision point, displacement y [m] from the collision position to the ground, bushing cargo mass m [kg], elastic modulus k [N / m], fall distance h [m], collision The velocity v0 [m / sec] of the immediately preceding cargo, the acceleration of gravity g [m / sec2], and the transport limit acceleration γ [G] specified for the cargo.

  According to Table 1, in the fourth embodiment, it is possible to absorb the impact with a movement displacement of about 1/3 as compared with the case where the impact is absorbed by elastic deformation. Therefore, it is possible to absorb the excessive impact force generated when the bushing cargo is unloaded at the time of unloading and unloading of the bushing cargo or when the cargo lands in the harsh handling with the frictional force, and without adding structure to the bushing itself. It is possible to provide a bushing transport device that can reduce the size of the device and reduce the bounce of cargo at the time of impact.

(Fifth embodiment)
A bushing transport device according to a fifth embodiment of the present invention will be described with reference to FIG.
The bushing transport device according to the fifth embodiment includes a packing box 4, an electromagnetic actuator 30 installed on the bottom plate 4a of the packing box 4, an electronic calculator 31, a signal converter 32, a power supply device 34, and an electromagnetic actuator. 30 a vibration table 37 fixed to the movable element 36, a base 1 fixed to the upper surface of the vibration table 37, a bushing 3 disposed on the upper surface of the base 1 via the shock absorbing medium 2, and a bushing 3, the elastic body 38 disposed on the pedestal 1, the wiring 14 connecting the acceleration sensor 11 and the electronic computer 31, and the electronic computer 31 and the signal converter 32 are connected. The wiring 13, the wiring 39 connecting the signal converter 32 and the electromagnetic actuator 30, the wiring 40 connecting the computer 31 and the power supply 34, and the wiring connecting the signal converter 32 and the power supply 34 Composed of one Tokyo.

  In the bushing transport apparatus configured as described above, when the bushing 3 is transported in an environment in which repeated vibration is applied in the lateral direction in FIG. 5, the repeated vibration is detected by the acceleration sensor 11, and the acceleration signal is transmitted via the wiring 14. It is transmitted to the electronic computer 31.

  The electronic computer 31 calculates and synthesizes an acceleration waveform having an opposite phase (180 ° inversion phase) with respect to the acceleration time waveform transmitted by the acceleration sensor 11, and transmits the synthesized waveform signal to the signal converter 32. The signal converter 32 converts the acceleration waveform signal having the opposite phase transmitted from the electronic computer 31 into an electric signal suitable for exciting the stator 42 of the electromagnetic actuator 30 such as an acceleration proportional current signal. Is transmitted to the stator 42 via the connection line 39.

The stator 42 causes the movable element 36 to generate an acceleration by means of an electromagnetic force of a coil or the like using an electric signal proportional to acceleration received from the signal converter 32. The stator 42 of the actuator mover 36 is arranged so that the direction of the acceleration generated on the vibration table 37 and the base 1 is opposite to the direction of the acceleration detected by the acceleration sensor 11 by the mover 36 of the electromagnetic actuator 30. Set the drive direction by. At this time, the base 1 generates an acceleration that is a difference between the acceleration that was originally generated and the acceleration applied by the electromagnetic actuator 30.
If the electronic computer 31 is programmed so as to automatically calculate the control condition so as to reduce the acceleration of the difference, the acceleration generated in the pedestal 1 is attenuated.

  According to the fifth embodiment, a compact and highly versatile active vibration damping system that can actively mitigate the impact caused by repeated lateral vibrations during bushing transportation without adding a shock mitigating function to the bushing itself. A bushing transport device with a function can be provided.

(Sixth embodiment)
A bushing transport device according to a sixth embodiment will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the structure same as 5th Embodiment, and the overlapping description is abbreviate | omitted.

  In addition to the configuration of the fifth embodiment, the bushing transport device according to the sixth embodiment is installed on the lower surface of the electromagnetic actuator 30 and is installed on the lower surface of the receiving plate 43 and moves in the vertical direction. An excitation table 44, an electromagnetic actuator 45 mounted on the bottom plate 4 a of the packaging box 1 on which the excitation table 44 is mounted and generating vertical acceleration, and an inner bottom plate of the packaging box 1 disposed at the four corners of the bottom plate of the receiving plate 43 An elastic body 46 composed of a spring or the like inserted between them, a telescopic rod 47 penetrating the spiral central portion of the elastic body 46 and inserted between the bottom plate 4a of the packing box 4 and the receiving plate 43, and the signal converter 32. And a wiring 48 for connecting the electromagnetic actuator 45.

  In the bushing transporting device configured as described above, when the bushing 3 is transported in an environment in which vibration is repeatedly applied in the horizontal direction and the vertical direction in FIG. Vibration is attenuated repeatedly. Further, in the present embodiment, the acceleration in the vertical direction is also detected by the acceleration sensor 11, and an anti-phase acceleration waveform is calculated and synthesized by the computer 31 with respect to the detected acceleration time waveform.

  The signal converter 32 converts the antiphase acceleration waveform into an electric signal for exciting the stator 49, and the stator 50 is excited by the electric signal to generate an acceleration in the movable element 50. By setting the drive direction of the mover 50 so that the acceleration generated in the mover 50 and the acceleration detected by the acceleration sensor 11 on the pedestal 1 are opposite to each other, the upper and lower components of the acceleration of the pedestal 1 are The vertical acceleration generated in the pedestal 1 is attenuated by programming the computer 31 so that the differential acceleration occurs and the electronic computer 31 automatically calculates the control condition so that the differential acceleration becomes smaller.

  According to the sixth embodiment, both the lateral acceleration and the vertical acceleration are attenuated, and it is caused by repeated vibrations in the lateral direction and the vertical direction during the bushing transportation without adding an impact relaxation function to the bushing itself. It is possible to provide a bushing transport device with an active vibration suppression function that is capable of actively mitigating impact and is small and highly versatile.

DESCRIPTION OF SYMBOLS 1 ... Base, 2 ... Shock absorption medium, 3 ... Bushing, 4 ... Packing box, 4a ... Bottom plate, 5 ... Shock absorption bag, 6 ... Receptacle plate, 7 ... Container (cylinder), 8 ... Open / close valve, 9 ... Communication pipe DESCRIPTION OF SYMBOLS 10 ... Sensor, 11 ... Acceleration sensor, 12, 14, 18, 23, 28 ... Wiring, 13 ... Control box, 15 ... Elastic body, 16 ... Stopper, 17 ... Operation mechanism, 19, 20 ... Opening, 21 ... Open / close valve, 22 ... connecting pipe, 24 ... brake rod, 25 ... brake mechanism, 26 ... brake pad, 27 ... operating mechanism, 30, 45 ... electromagnetic actuator, 31 ... electronic computer, 32 ... signal converter, 34 ... power supply , 36, 50 ... mover, 37, 44 ... vibration table, 38, 46 ... elastic body, 39, 40, 41, 48 ... wiring, 42, 49 ... stator, 43 ... backing plate, 47 ... telescopic rod.

Claims (5)

A packing box that accommodates the bushing therein, a receiving plate provided below the bottom plate of the packing box via an elastic body, an impact absorbing bag attached between the bottom plate and the receiving plate of the packing box, and the packing A pedestal provided in the box on which a bushing is placed via an impact absorbing material, an acceleration sensor, a sensor for detecting the grounding or non-grounding state of the backing plate, and a container filled with a compressive fluid In the bushing transport device,
Bushing transport, wherein the sensor detects a non-grounded state of the backing plate and the compressive fluid is supplied from the container to the shock absorbing bag when the acceleration sensor detects an acceleration exceeding a set value. apparatus.   An opening provided in the packing box; an opening provided in the shock absorbing bag; and a connecting pipe that connects the two openings via an on-off valve; and the compressive fluid absorbs the shock. The bushing transport device according to claim 1, wherein the connecting pipe is opened after being supplied to the bag.   3. The bushing transport device according to claim 2, wherein the compressive fluid is made of a viscous fluid. A packing box for accommodating the bushing therein, a receiving plate provided on the bottom plate of the packing box via an elastic body, a stopper attached to the bottom plate of the packing box and holding the receiving plate at a predetermined interval, and the packing In the bushing transport device, which is provided in the box and has a pedestal on which the bushing is placed via the shock absorber, an acceleration sensor, and a sensor for detecting the grounding or non-grounding state of the backing plate,
The bushing transporting apparatus, wherein the stopper is opened when the sensor detects a non-grounded state of the backing plate and the acceleration sensor detects an acceleration exceeding a set value. A packing box for accommodating the bushing therein, a receiving plate provided at a lower portion of a bottom plate of the packing box, a plurality of braking rods attached to the receiving plate and extending slidably in the packing box, and the packing box In the bushing transport device having a brake pad for braking the brake rod and a pedestal on which the bushing is placed via a shock absorber,
The bushing transporting apparatus, wherein when the packing box is lifted, the brake pad is held in contact with the brake pad at a predetermined surface pressure.

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