JPH01111683A - Container box with damping controller - Google Patents

Abstract

PURPOSE:To almost completely depress vibration of a contained article, by detecting vibration propagated from an outer box to an inner box via an elastic material by oscillation-detectors arranged for three-directional components mutually crossed, and by driving a weight in each weight driving device based on the result. CONSTITUTION:An inner box 2 which is contained inside in a fixed state is supported in a floating state in an outer box 1. Respective vibration components of X, Y, Z axes brought about in the inner box 2 are detected by oscillation- detectors 5a, 5b; 6a, 6b; 7a, 7b to input into respective vibration controller 50, 60, 70. For instance, output signals of oscillation-detectors 5a, 5b to the X-axis of vibration is transmitted to the vibration controller 50. Vibration force Fx of the X-axis acting on a weight driving apparatus 8 is calculated by the controller 50 and driving current I necessary to generate anti-vibrating force -Fx in a weight driving apparatus 8 is calculated to output to a driving electric source 8a. The driving current I is transmitted to the weight driving apparatus 8 and the weight moves at a required acceleration. By this reaction, anti- vibrating force -Fx acts on the inner box 2 to almost completely depress the X-axial vibration force component brought about in the inner box 2.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention is useful for transporting objects that may cause various problems due to vibrations applied to them, such as precision machines that incorporate complex mechanical parts, or This invention relates to a vibration-damping storage box suitable for use or storage in places with poor conditions.

[Conventional technology]

When transporting a precision machine that has many complex mechanical parts, such as an optical disk device, or when using it in a place with poor vibration conditions, such as on a moving car, vibrations applied from the outside may damage the mechanism. There is a risk that malfunction may occur in each part, which may not only cause malfunction, but may even cause permanent failure. When transporting, using or storing in a place with poor vibration conditions,
There is a problem in that it is necessary to pay close attention to the vibrations applied to the object.

Conventionally, storage boxes for storing such objects have been constructed by suspending an inner box inside an outer box from a variety of different directions using a plurality of support springs, and holding the object inside the inner box. A vibration-damping storage box that is fixed and stored is used. .

[Problem that the invention seeks to solve]

This vibration-damping storage box attenuates vibrations generated in the outer box due to external force through the damping action of the support spring, and suppresses the transmission of this vibration to the inner box, in other words, to the stored objects fixed thereto. However, it is not possible to obtain a sufficient vibration suppression effect, and even when this is used, it is still necessary to take appropriate measures against external forces acting on the outer box and vibrations caused by this external force. However, there is a drawback in that the troublesomeness of transporting the object or using or storing the object in a place with poor vibration conditions, which requires careful attention, is only slightly alleviated.

The present invention has been made in view of the above circumstances, and provides vibration damping that can almost completely prevent the transmission of external vibrations to objects to be stored, and that can safely store objects that would otherwise cause problems due to the application of vibrations. The purpose is to provide a storage box.

[Means for solving problems]

The vibration damping storage box according to the present invention detects components of vibrations generated in the inner box, which is supported in the outer box via an elastic body and has a stored object fixed therein, in three directions that intersect with each other. At the same time, one or more vibration detectors are installed, and a weight driving device each having a built-in weight that can be driven in one direction is installed so that the driving directions of the weights are three directions that intersect with each other. , each one or a plurality of each are attached, and the weights of the respective weight driving devices are driven based on the detection results of the respective vibration detectors.

[Effect]

In the present invention, vibrations generated in the outer box due to external force are transmitted to the inner box via the elastic body, and when vibrations occur in the inner box, components of the vibration in three directions that intersect with each other are detected. The built-in weights in each weight driving device are vibrated based on the detection results, and a damping force is applied to cancel out the vibrations acting on the inner box in each of the three directions. In addition to the box, vibrations of the inner box and the items stored therein are suppressed.

〔Example〕

The present invention will be described in detail below based on drawings showing embodiments thereof. FIG. 1 is a partially cutaway perspective view of a vibration damping storage box according to the present invention.

In the figure, l denotes an outer box having a rectangular parallelepiped shape with a hollow interior, and caster wheels 1a, la, etc. for movement are attached to the four outer corners of the bottom surface of the outer box 1, respectively. - A rectangular hole for leading in and out of stored items is formed approximately at the center of the side surface and has a door 1b attached thereto so as to be openable and closable. Also, 2 in the diagram
is an inner box having an opening 2a on almost the entire surface of its side surface and having a hollow rectangular parallelepiped shape inside, and the inner box 2 has eight corners on its outer surface and a box corresponding to each corner. Eight support springs 3, 3 and 3 are interposed between the eight corners of the inner surface of the outer box.
..., so that the opening 2a faces the inner surface of r:A 1 b, and is supported in a floating state inside the outer box 1.

In the vibration damping storage box according to the present invention configured as described above, the stored object 4 is introduced into the outer box 1 through the open door 1b, and is further introduced into the inner box 2 through the opening 2a. Then, it is fixed inside the inner box 2 by appropriate fixing means and stored as shown in the figure.

On the top surface of the inner box 2, there are two vibration detectors 5a, 5b and 6a, 6b each for detecting vibrations in directions perpendicular to each other within the top surface, and two vibration detectors for detecting vibrations in a direction perpendicular to the top surface. The vibration detectors 7a and 7b are fixed to each other. The vibration detectors 5a and 5b are fixed on a straight line orthogonal to the direction of the vibration detected by them, with an appropriate distance apart from each other, and the fixed positions of the vibration detectors 6a and 6b are set in the same manner. ing.

Therefore, when the fixing positions of the vibration detectors 5a and 5b are set on a straight line perpendicular to the side of the top surface of the inner box 2 on the side where the door 1b is attached, as shown in FIG. , is set on a straight line perpendicular to the side, in this case,
Vibration detectors 5a and 5b detect vibrations in a direction parallel to the side (X-axis direction) at each fixed position, and vibration detectors 6a and 6b detect vibration in a direction perpendicular to the side (X-axis direction) at each fixed position. (Y-axis direction) and outputs a signal corresponding to the amplitude, velocity, or acceleration of each detected vibration.

In addition, vibration in the direction (Y-axis direction) perpendicular to the top surface of the inner box 2 is detected at each fixed position, and the amplitude of the vibration is measured.

The vibration detector/hangers 7a and 7b that output signals corresponding to velocity or acceleration may be fixed to the upper surface of the inner box 2 at an appropriate distance from each other, for example, as shown in FIG. 1, in the X-axis direction. Fixed on a straight line. The output signals of the vibration detectors 5a and 5b are given to the input side of a vibration damping control unit 50 fixed to the inner surface of the outer box 1, and similarly, the output signals of the vibration detectors 6a and 6b and the vibration detectors 7a and 7b are The output signals are provided to the input sides of separate vibration damping control units 60 and 70 fixed to the inner surface of the outer box 1, respectively.

Further, on the upper surface of the inner box 2, a first weight driving device 8 is located on a straight line connecting the fixing positions of the vibration detectors 5a and 5b.
However, the second weight driving device 9 is located on the straight line connecting the fixed positions of the vibration detectors 6a and 6b, and the third weight driving device 9 is further positioned on the straight line connecting the fixed positions of the vibration detectors 7a and 7b. The weight drive devices 10 are respectively attached. FIG. 2 is a longitudinal sectional view showing the internal structure of the weight driving device 8. FIG. The weight driving device 8 is provided protrudingly from one surface of a coil holding stand 81 erected on the base 80 with its axis parallel to the upper surface of the base 80.
A cylindrical coil bobbin 82 having a coil 83 wound around its outer peripheral surface, and a coil bobbin 82 mounted on the base 80.
A weight configured on a movable platform 85 whose lower part engages with a guide member 84 formed with the axial direction as the longitudinal direction, and is mounted on a movable platform 85 so as to be movable in a direction along the guide member 84 while slidingly contacting the guide member 84. It consists of 86. The weight 86 is a cylindrical magnet 88 with an N pole and an S pole formed on both sides between support members 87 and 87 that are respectively erected perpendicularly to both ends of the moving table 85 in the moving direction. is fixed so that the axis of the magnet 88 coincides with the axis of the coil bobbin 82 when the movable table 85 is engaged with the guide member 84.

A circular hole 87a having a diameter larger than the outer diameter of the coil 83 is formed in one of the support members 87 and 87, and is centered on the axis of the magnet 88. A guide rod 87b having a cylindrical shape and having a diameter smaller than the inner diameter of the coil bobbin 82 is coaxial with the coil bobbin 88.
is required to protrude. The weight 86 configured in this manner engages the movable table 85 with the guide member 84, and also fits the guide rod 87b into the coil bobbin 82 to move the base 80.
When a current is applied to the coil 83, a force is applied in the axial direction of the coil bobbin 82 due to the action of a magnetic field formed around the coil 83 by the current, causing the coil bobbin 82 to move horizontally. In this case, the direction of movement of the weight 86 corresponds to the direction in which the current is applied, and the force that the weight 86 receives in the movement direction corresponds to the magnitude of the current.

The first weight driving device 8 configured as described above moves the movement direction of the weight 86 in the X-axis direction, that is, in the vibration detector 5a,
5b, the base 80
It is installed by fixing it to the top surface of the inner box 2. The second weight driving device 9 has exactly the same configuration as the weight driving device 8, and the moving direction of the built-in weight (not shown) is determined by the Y-axis direction, that is, by the vibration detectors 6a and 6b. It should be installed to match the direction of the vibration to be detected. On the other hand, the weight drive device 0 of plan 3 differs from the weight drive devices 8 and 9 in that the built-in weight (not shown) moves in a direction perpendicular to the base (not shown). It is composed of a weight drive device 8,
9, when the base is fixed to the top surface of the inner box 2, the moving direction of the weight is detected in the X-axis direction perpendicular to the top surface of the inner box 2, that is, the vibration detectors 7a and 7b. It is designed to match the direction of vibration. These weight drive devices 8.9.10 are respectively connected to separate drive power supplies 8a+9a+10a fixed to the inner surface of the outer box 1, and the built-in weights are controlled according to the drive current given from these. The weight is driven as described above. In addition, these drive power sources 8
a+9a, 10a are the vibration damping control units 50, 60.70
are connected to the output sides of the vibration damping control section 50, 60 or 70, and operate to apply different drive currents to the weight drive value 78, 9, 10 in accordance with the output and force signals of the vibration damping control section 50, 60 or 70, respectively.

In the vibration damping storage box configured as described above, when the outer box 1 vibrates due to an external force acting on the outer box 1, this vibration is suppressed by the support springs 3, 3...; is transmitted to the inner box 2, causing vibration in the inner box 2. When vibration occurs in the inner box 2, each component of the vibration in the X-axis direction, Y-axis direction, and X-axis direction is detected by the vibration detectors 5a, 5b, 6a, 6b, and 7a, 7b. is detected at each fixed position, and each detection result is inputted to each separate vibration damping control unit 50, 60, and 70 as the amplitude, velocity, or acceleration of the detected vibration component.

For example, when the output signals of the vibration detectors 5a and 5b that detect the vibration component of the vibration in the X-axis direction are given to the vibration damping control section 50 connected thereto, the vibration damping control section 50 When the output signal corresponds to the amplitude of the vibration component, the output signal is divided into two parts, and when the output signal corresponds to the speed, it is divided into one part, and the output signal is divided into two parts, and when the output signal corresponds to the speed, the output signal is divided into one part, and the output signal is divided into two parts. The direction and magnitude of the vibration acceleration in the X-axis direction are determined, and from this and the mass of the inner box 2 containing the stored object 4, the inner box 2 is
The vibration forces Fa and Fb that act on the weight drive device 8 are calculated, respectively, and then, using these calculated values, the vibration force Fx that acts on the weight drive device 8 in the X-axis direction at its fixed position is calculated using the following equation.

! .

However, 2. is the separation distance between the fixed position of the weight drive device 8 and the fixed position of the vibration detector 5a on the upper surface of the inner box 2, and I12 is the separation distance between the fixed position of the weight drive device 8 and the vibration detection This is the separation distance from the fixed position of the container 5b.

After calculating the vibration force Fx in this way, the vibration damping control unit 50 controls the coil 83 necessary for generating a vibration damping car Fx in the opposite direction and the same size as the vibration force Fx in the weight drive device 8. The direction and magnitude of the driving iJ flow 1 are stored in advance and calculated from the mass of the weight 86 and the properties of the coil 83, and a signal corresponding to this calculated value is sent to the driving power source 8.
Output to a. The drive power source 8a is connected to the vibration damping control section 50.
As a result of applying the driving current I to the coil 83 of the weight driving device 8 in accordance with the output signal of
The vibration damping car Fx acts on the inner box 2 through the inner box 2, the vibration force Fx is canceled out, and the X-axis direction component of the vibration generated in the inner box 2 is almost completely suppressed.

The vibration damping control section 60 to which the output signals of the vibration detectors 6a and 6b are given, and the vibration damping control section 70 to which the output signals of the vibration detectors 7a and 7b are given operate in the same manner, so that the output of the vibration damping control section 60 It is applied from the drive power source 9a depending on the signal.

The generated drive current drives the weight drive device 9, and the Y-axis direction component of the vibration generated in the inner box 2 due to the reaction caused by the movement of the weight inside the device 9 is almost completely suppressed. The weight drive device 10 is driven by a drive current applied from the drive power source 10a in response to the output signal of the device 70, and the X-axis direction component of the vibration generated in the inner box 2 due to the reaction caused by the movement of the weight within the device 10 is Almost completely suppressed.

In this way, in the vibration damping storage box according to the present invention, the inner box 2
Since the vibrations generated in the inner box 2 are substantially completely suppressed in each of the three directions orthogonal to each other, the stored object 4 fixed in the inner box 2 is hardly vibrated.

In this embodiment, the vibration detectors 5a to 7a and the weight drive devices 8 to 10 are all attached to the top surface of the inner box 2, but some or all of these may be attached to other surfaces of the inner box 2. Needless to say, it's a good thing. However, even in this case, the vibration detectors 5a, 5b, the weight drive device 8, the vibration detector 6a,
6b, the weight driving device 9, and the vibration detectors 7a, 7b, the weight driving device 10 are preferably provided on a straight line, respectively.

In addition, in this embodiment, two vibration detectors are provided in the X-axis, Y-axis, and X-axis directions, but for example, one vibration detector in the X-axis direction is installed near the mounting position of the weight drive device 8. The structure may also be such that the weight driving device 8 is driven based on the detection result of the vibration detector. Similarly, in the Y-axis direction and the X-axis direction, the vibration detector The structure may be such that the weight driving device 9 and the weight driving device 10 are respectively driven based on the detection results. Conversely, three or more vibration detectors may be provided in each axis direction.

Further, in this embodiment, one weight drive device 8 that can drive the weight in the X-axis direction is provided, but the vibration detector 5a
, 5b may be provided on a straight line connecting the fixed positions of the weights 5b. When there is only one weight drive device 8, if rotational vibration occurs in the inner box 2 about an axis parallel to the Z-axis passing through the installation center of the weight drive device 8, the vibration detector 5a,
Vibration force F calculated as described above based on the detection result of 5b
This means that the weight driving device 8 does not generate a damping car Fx to offset this, but this difficulty can be solved by providing two or more weight driving devices 8. Similarly, a plurality of each of the weight driving devices 9 and 10 may be provided.

Further, it is desirable that the vibration detectors 5a, 5b, vibration detectors 6a, 6b, and vibration detectors 7a, 7b be installed so that their respective vibration detection directions are orthogonal to each other, as shown in this embodiment, and Apparatus 8.9. Although it is desirable that the IO be installed so that the driving directions of the respective weights are orthogonal to each other, the vibration detection direction and the driving direction do not have to be orthogonal to each other.

Furthermore, in this embodiment, vibration damping control units 50, 60, 70 and drive power supplies 8a+9a+10a are provided inside the outer box 1,
Although an attempt is made to effectively utilize the surplus space within the outer box 1, it goes without saying that some or all of these may be provided outside the outer box 1.

〔Effect of the invention〕

As detailed above, in the vibration damping storage box according to the present invention,
When vibration is transmitted from the outer box to the inner box via the elastic body,
Components of this vibration in three directions that intersect with each other are detected by the respective vibration detectors, and based on the detection results, the built-in weights in the respective weight drive devices are driven, and as the weights move, the weights Since the reaction force acts on the inner box and this vibration is almost completely canceled out, there is no vibration in the stored object fixed in the inner box, and the stored object is an object with poor durability against vibration. Even in some cases, there is no risk of inconvenience caused by vibrations, and such objects can be transported safely and easily without paying attention to vibrations, and they can be easily transported without failure or malfunction in places with poor vibration conditions. It can be used without causing any problems and has an equivalent effect.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a partially cutaway perspective view of a vibration damping storage box according to the present invention, and FIG. 2 is a vertical sectional view showing the internal structure of a weight drive device. be. 1...Outer box 2...Inner box 3...Support spring 4
...Stored objects 5a, 5b, 6a, 6b, 7a,
7b +++ Vibration detector 8, 9.10... Weight drive device 50, 60.70... Vibration damping control unit Note that in the drawings, the same reference numerals indicate the same or equivalent parts. Agent Masu Oiwa Rinko branch no.
rne4・-next@Atsushi Notakiri 1
Circle 5a, 5b, 6a, 6b, 7a, 7b---[1b
4tai88.9g □ --- Heavy bell cantering!

Claims (1)

[Claims] 1. An inner box in which objects are fixed and stored is supported in a floating state within an outer box via an elastic body, and vibrations applied to the outer box are suppressed by the elastic body. In the vibration damping storage box, one or a plurality of vibration detectors are installed in the inner box and each detect the components of the vibrations generated in the inner box in three mutually intersecting directions, and a built-in weight is installed in a predetermined manner. one or a plurality of weight drive devices attached to the inner box so that the weight drive devices can be driven in the directions of the vibrations, and each of the weight drive devices is attached to the inner box so that the drive directions thereof are directed in three directions that intersect with each other; A vibration damping storage box characterized by comprising means for driving based on detection results from each of the detectors.