JP2009269649A - Anti-vibration pallet and anti-vibration device equipped with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an anti-vibration pallet requiring no necessity for adjusting natural frequency of a transported object even if its weight changes and having a table not inclined in response to a mounting position of the transported object and further provide an anti-vibration device capable of substantially decreasing an acceleration acting in a lateral direction of the transported object when accelerating or decelerating or inclining transporting means. <P>SOLUTION: An anti-vibration device 1A includes an anti-vibration pallet 2 and a transporting shock reducing device 28A. The anti-vibration pallet 2 includes a diaphragm type air spring 7 between an upper table 4 and a lower table 5. In addition, the anti-vibration pallet 2 includes an automatic leveling device 13 for adjusting automatically the air pressure of the diaphragm type air spring 7 in such a way that the upper table 4 and the lower table 5 may have a constant distance between them. The transporting shock reducing device 28A is constituted in such a way that a mounting surface 6 is inclined in a direction where an acceleration component in parallel with the mounting surface 6 acting on a transported object 26 is reduced when an acceleration α in a horizontal direction acts on the transported object 26. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vibration isolating pallet for mitigating vibrations acting on a conveyed object during transportation and a vibration isolating apparatus including the same.

  In order to transport safely transported goods such as optical precision machines, electronic devices such as computers and televisions, glass crafts, etc., which are easily damaged by impact and vibration, by means of transportation such as trucks, airplanes, ships, etc. It is necessary to mitigate vibrations acting on the transported material. Therefore, conventionally, when transporting a transported object, the transported object is installed on an anti-vibration pallet to protect it from impact and vibration. The following Patent Document 1 discloses a conventional anti-vibration pallet.

  FIG. 12 is a configuration diagram of the anti-vibration pallet 70 disclosed in Patent Document 1. As shown in FIG. In FIG. 12, the anti-vibration pallet 70 placed on the base plate 71 a of the base 71 is disposed as a leg portion between the lower base 73, the upper base 72 on which the conveyed product 74 is placed, and the lower base 73 and the upper base 72. The anti-vibration means 75 is provided, and the upper stand 72 is elastically supported by the anti-vibration means 75. The vibration isolation means 75 is formed of a damping coil spring in which a viscoelastic sheet is bonded to the outer periphery or inner periphery of the compression coil spring.

JP 2007-297056 A

  In the conventional anti-vibration pallet 70 using the coil spring described above, the natural frequency of the coil spring differs depending on the weight of the conveyed product, and therefore it is necessary to adjust the natural frequency each time with an auxiliary spring or the like. Moreover, since the deflection of the coil spring is increased only at the place where the conveyed product 74 is placed, there is a problem that the upper base 72 is inclined.

  Further, when the transportation means accelerates or decelerates, there is a problem in that the acceleration in the horizontal direction acts on the conveyed product due to the inertial force, and this horizontal acceleration adversely affects the conveyed product 74. In general, a structure is strong in the vertical direction but weak in the lateral force. For example, in the case of a precision instrument equipped with a lens that requires precise positional accuracy, the lens position may be shifted due to horizontal acceleration, and the lens position may need to be readjusted after transportation.

  Furthermore, when transported by an aircraft, the transported object 74 tilts according to the inclination angle during take-off and landing, so that the component force of gravitational acceleration acts in the lateral direction of the transported object 74, which has a problem of adversely affecting precision equipment. .

  The present invention has been made in view of the above problems, and there is no need to adjust the natural frequency even if the weight of the transported object changes, and a vibration isolating pallet that does not tilt the gantry depending on the position on which the transported object is placed. The issue is to provide. It is another object of the present invention to provide an anti-vibration device capable of significantly mitigating acceleration acting in the lateral direction of a conveyed product during acceleration / deceleration or tilting of the transportation means.

  In order to solve the above-described problems, the vibration isolating pallet of the present invention and the vibration isolating apparatus including the same employ the following technical means.

(1) The anti-vibration pallet of the present invention is disposed between a pallet main body composed of an upper frame and a lower frame that are spaced apart in the vertical direction, and between the upper frame and the lower frame. And a diaphragm type air spring that suppresses vertical and horizontal vibrations from the lower frame.

  The vibration isolating pallet of the present invention employs a diaphragm type air spring as an elastic support means disposed between the upper frame and the lower frame. Since the air spring has a small change in the natural frequency even if the weight of the conveyed product changes, it is not necessary to adjust the natural frequency by an auxiliary spring or the like. Further, by increasing the internal volume of the air spring, the natural frequency in the vertical direction can be lowered, and the performance can be improved. In addition, since the diaphragm type air spring can be displaced in the horizontal direction, vibrations in the horizontal direction can be reduced.

(2) In the vibration proof pallet of (1), an air chamber is formed in one or both of the upper frame and the lower frame, and the inside of the diaphragm type air spring, the air chamber, Are communicating.

  According to said structure, the air chamber formed in the mount can be utilized as an auxiliary air tank, and an internal volume can be enlarged. For this reason, it is not necessary to install a separate auxiliary air tank.

(3) In the vibration proof pallet of (2) above, the upper structure and the lower structure in which the air chamber is formed is a honeycomb structure panel.

  According to the above configuration, the honeycomb structure panel originally has a hollow portion, and an air chamber can be configured by using the hollow portion, which is suitable as a gantry.

(4) In the vibration proof pallet of (2) or (3), the air chamber is formed on both the upper frame and the lower frame, and the air chambers of the upper frame and the lower frame are They are connected by flexible air piping.

  According to said structure, the internal volume of an air spring can be enlarged more by making the air chambers of an upper frame and a lower frame communicate with each other by flexible air piping.

(5) In the vibration-proof pallet according to any one of (1) to (4), a laminated rubber is disposed between the diaphragm air spring and the upper frame or between the diaphragm air spring and the lower frame. Has been.

  According to said structure, the amount of horizontal displacement can be enlarged by adding laminated rubber.

(6) In the vibration-proof pallet according to any one of (1) to (5), a plurality of the diaphragm type air springs are installed at positions spaced apart from each other, and the plurality of diaphragm type air springs are further provided. The air pressure of the diaphragm type air spring is automatically adjusted so that the distance becomes constant based on the output of a height sensor linked to the distance between the upper frame and the lower frame. Automatic leveling device to adjust.

  According to the above configuration, the level of the gantry is detected by the automatic leveling device, the compressed air is supplied to and exhausted from the air spring, and the level of the upper gantry is automatically maintained. The upper frame does not tilt depending on the position.

(7) The vibration isolator of the present invention includes the vibration isolating pallet according to any one of the above (1) to (6) and a mounting surface on which the anti-vibration pallet is placed, and the conveyed item is the vibration isolating pallet. When the horizontal acceleration is applied to the transported object in the mounted state, the mounting surface is inclined so as to reduce the acceleration component parallel to the mounting surface acting on the transported object. And a shock reducing device for transportation.

  According to the above-described configuration of the present invention, when the transportation shock is reduced by the transportation shock reduction device, the loading surface of the conveyed object is inclined with respect to the horizontal plane so that the horizontal acceleration (acceleration due to inertial force) The resultant force of gravitational acceleration approaches perpendicular to the placement surface. Thereby, the acceleration which acts on the horizontal direction of a conveyed product can be reduced significantly. In addition, according to the configuration of the above-described transportation shock reduction device, when the aircraft is tilted during takeoff and landing, the mounting surface automatically changes the relative posture with respect to the aircraft in the direction of canceling the aircraft tilt. The mounting surface can be maintained almost horizontal. Thereby, since the component force of gravitational acceleration does not act in the lateral direction of the transported object, it is possible to prevent the acceleration from acting in the lateral direction of the transported object when the aircraft is inclined during takeoff and landing.

(8) Further, in the vibration isolator of the above (7), the transport shock reducing device includes a guide rail extending in the horizontal acceleration direction and a mounting surface that is movable on the guide rail. The guide rail has a rail shape such that when the mounting table moves in the horizontal acceleration direction, the front in the moving direction of the mounting surface is relatively high and the rear is relatively low. Have.

According to the above configuration, the mounting surface moves in the direction of reducing the acceleration component parallel to the mounting surface acting on the transported object by moving the mounting table on the guide rail when receiving the acceleration in the horizontal direction. Can be tilted.

(9) In the vibration isolator of (8), the guide rail is connected to each of the linear rail portion extending in the horizontal acceleration direction and both ends of the linear rail portion, and the horizontal distance from the both ends. A curved rail portion that curves so that the rail height increases as the height increases

(10) In the vibration isolator of (8), the guide rail has a rail shape that is curved so as to be convex downward.

  As described above, the guide rail may have a shape including a straight rail portion and a curved rail portion, or may have a shape that is entirely curved.

(11) Further, in the vibration isolator of any one of (8) to (10), the mounting table includes a first and a first slide slidable on the guide rail so as to be separated from each other in the longitudinal direction of the guide rail. A second guide block is provided, and the first guide block and the second guide block are rotatably attached to the mounting table.

  According to said structure, since each guide block is rotatably attached with respect to a mounting base, when a mounting base moves along a guide rail, a guide block rotates freely with respect to a mounting base. Thereby, the guide block can move on the guide rail smoothly.

(12) In the vibration isolator of the above (7), the transport shock reducing device includes a mounting table having the mounting surface, a hanging means for supporting the mounting table in a suspended manner, and an upper end of the hanging means. And a suspending point moving device that moves one or both of the lower ends in the horizontal direction, and the suspending means suspends and supports the mounting table at a position spaced forward and backward in the horizontal acceleration direction. And lower ends of the first suspension member and the second suspension member are swingably connected to the mounting table, and upper ends of the first suspension member and the second suspension member. Is swingably connected to a portion of the structure where the shock reducing device for transportation is located above the mounting table, and the hanging point moving device is horizontally connected to the horizontal acceleration direction. The first suspension member and the second suspension member as viewed from the side As a posture that form the Ha-shaped, to move one or both of the upper and lower ends of the hanging means in the horizontal direction.

  According to said structure, since the 1st suspension material and the 2nd suspension material are inclined so that it may become the shape which makes a U shape, when a horizontal acceleration is received, a horizontal movement of a mount frame Accordingly, the placement surface can be inclined in a direction to reduce the acceleration component parallel to the placement surface acting on the conveyed product.

(13) Further, in the vibration isolator of the above (7), the shock reduction device for transportation includes a mounting table having the mounting surface described above, and an arc guide mechanism that variably supports the posture of the mounting table, The arc guide mechanism has a swinging part that is swingable about a swinging center located above the mounting surface before and after the horizontal acceleration direction along the arcuate guide.

  According to the above configuration, when the acceleration in the horizontal direction is received, the swinging portion is tilted by the arc guide mechanism, so that the mounting surface is reduced in the direction in which the acceleration component parallel to the mounting surface acting on the conveyed object is reduced. Can be tilted.

(14) In the vibration isolator of the above (7), the transportation shock reduction device includes a mounting table having the mounting surface described above, and an inclination guide mechanism that variably supports the posture of the mounting table, The tilt guide mechanism has two linear tilt guides that are opposite to each other before and after the horizontal acceleration direction. When the tilt guide mechanism moves in the horizontal acceleration direction together with the mounting table, the front in the movement direction rises and the rear is Tilt the mounting table so that it descends.

  According to said structure, when receiving the acceleration of a horizontal direction, it can be made to incline a mounting surface in the direction which reduces an acceleration component parallel to the mounting surface which acts on a conveyed product by an inclination guide mechanism. it can.

According to the vibration-proof pallet of the present invention, it is not necessary to adjust the natural frequency even if the weight of the conveyed product changes, and the gantry is not inclined depending on the position on which the conveyed item is placed.
According to the vibration isolator of the present invention, it is possible to greatly relieve the acceleration acting in the lateral direction of the conveyed product during acceleration / deceleration or inclination of the transportation means.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected to the common part in each figure, and the overlapping description is abbreviate | omitted.

  FIG. 1 is a diagram showing a configuration of a vibration isolator 1A according to the first embodiment of the present invention. In FIG. 1, the vibration isolator 1 is installed inside a container 19. The vibration isolator 1 includes the vibration isolating pallet 2 of the present invention. In addition, the vibration isolator 1 may be directly installed in the cargo compartment of an aircraft or a truck bed, in addition to being installed inside the container 19.

  As shown in FIG. 1, the vibration isolator 1 </ b> A includes a vibration isolating pallet 2 that reduces the vibration transmitted to the conveyance object 26 during transportation by placing the conveyance object 26, and a horizontal direction on the conveyance object 26 by placing the vibration isolation pallet 2. And a transportation shock reduction device 28A for inclining the mounting surface 6 when the acceleration α is applied.

First, the configuration of the anti-vibration pallet 2 will be described.
The anti-vibration pallet 2 is detachably installed on the mounting table 32 of the transportation shock reduction device 28A. As shown in FIG. 1, the anti-vibration pallet 2 is disposed between a pallet main body 3 including an upper frame 4 and a lower frame 5 that are spaced apart in the vertical direction, and between the upper frame 4 and the lower frame 5. And a diaphragm type air spring 7 that supports a load from the upper frame 4 and suppresses vertical and horizontal vibrations from the lower frame 5. As shown in FIG. 1, a plurality of diaphragm type air springs 7 are installed between the upper frame 4 and the lower frame 5 at an appropriate interval.

  In the present embodiment, the upper frame 4 and the lower frame 5 are both formed of a honeycomb structure panel. The upper surface of the upper gantry 4 is a mounting surface on which the conveyed product 26 is placed. Between the diaphragm type air spring 7 and the lower mount 5, a leg portion 20 that supports the diaphragm type air spring 7 is disposed.

  FIG. 2 is an enlarged view of part A in FIG. As shown in FIG. 2, a large number of air chambers 23 and 24 are formed by honeycomb cells in the upper frame 4 and the lower frame 5 formed of a honeycomb structure panel.

  The diaphragm type air spring 7 is arranged between a cylindrical upper holding material 9, a cylindrical lower holding material 10 arranged inside the upper holding material 9, and between the upper holding material 9 and the lower holding material 10. It comprises a cylindrical diaphragm 8. The diaphragm 8 is an elastic film made of a rubber material, and has a shape in which a ring-shaped outer portion 8a and an inner portion 8b are connected at the lower portion. Further, the upper portion of the outer portion 8a is connected to the upper holding member 9, and the upper portion of the inner portion 8b is connected to the lower holding member 10, whereby the air chamber 11 is formed inside. Compressed air is sealed in the air chamber 11.

  Since the diaphragm type air spring 7 is configured as described above, the diaphragm 8 is deformed following the relative positional displacement of the upper holding member 9 and the lower holding member 10 in the vertical and horizontal directions due to vibration, so that Can absorb vibrations in the horizontal and horizontal directions.

  Thus, the vibration isolating pallet 2 of the present invention employs the diaphragm type air spring 7 as the elastic support means disposed between the upper frame 4 and the lower frame 5. Since the natural frequency of the air spring 7 is small even if the weight of the conveyed product 26 changes, it is not necessary to adjust the natural frequency by an auxiliary spring or the like. Moreover, since the diaphragm type air spring 7 can be displaced in the horizontal direction, vibrations in the horizontal direction can be reduced.

ここで、Ｍは質量、Ｐは荷重、δは撓み、ｐは内圧（ゲージ圧）ｐ_０は大気圧、Ａは有効受圧面積、Ｖは内容積（補助タンクを含む）、γはポリトロール指数である。 Here, the spring constant k of the air spring 7 is indicated by the following equation (1) [Equation 1], the natural frequency f ₀ is represented by the following formula (2) [Equation 1]. Therefore, by increasing the internal volume of the air spring 7, the natural frequency in the vertical direction can be lowered, and the performance can be improved.

Here, M is mass, P is load, δ is deflection, p is internal pressure (gauge pressure) p ₀ is atmospheric pressure, A is effective pressure receiving area, V is internal volume (including auxiliary tank), γ is polytrol index It is.

  In the present embodiment, as shown in FIG. 2, the air chamber of the air spring 7 and the air chamber of the upper frame 4 are communicated with each other through a connection hole 9 a formed in the upper holding member 9. The internal volume is increased. In this case, the internal volume can be further increased by communicating the air chambers of the upper frame 4 with each other. Note that one or both of the upper frame 4 and the lower frame 5 may be configured by a panel other than the honeycomb structure panel. In this case, an air spring is formed in the panel so that an air spring is formed as described above. The internal volume of 7 may be increased.

  In this embodiment, the air chamber 23 of the upper frame 4 and the air chamber 24 of the lower frame 5 are connected by a flexible air pipe 12. The air pipe 12 communicates with the air chambers 23 and 24 through connection holes 25a and 25b formed in the upper frame 4 and the lower frame 5, respectively. The air chamber 23 that communicates directly with the upper end of the air pipe 12 communicates with the air spring 7 directly or via another air chamber. The air chamber 24 that communicates directly with the lower end of the air pipe 12 communicates with one or more other air chambers in the lower frame 5. With such a configuration, the internal volume of the air spring 7 can be further increased.

  In the present embodiment, the leg portion 20 that supports the diaphragm type air spring 7 is constituted by a laminated rubber 21. The laminated rubber 21 has a structure in which a plurality of rubber materials and metal plates are alternately stacked, and can be displaced in the horizontal direction. Thus, by adopting the laminated rubber 21 as the leg portion 20, the amount of horizontal displacement can be increased. The positional relationship between the diaphragm type air spring 7 and the laminated rubber 21 may be upside down as shown in FIG.

  The vibration isolating panel of the present embodiment further includes an automatic leveling device 13 that keeps the distance between the upper frame 4 and the lower frame 5 constant. The automatic leveling device 13 is attached to each of the plurality of diaphragm type air springs 7, and the above distance is determined based on the output of the height sensor 14 that is linked to the distance between the upper frame 4 and the lower frame 5. The air pressure of the diaphragm type air spring 7 is automatically adjusted so as to be constant.

  FIG. 3 is a plan view showing an arrangement configuration of the air spring 7 and the automatic leveling device 13. In the configuration example of FIG. 3, a total of eight sets of the air spring 7 and the automatic leveling device 13 are arranged in the left-right and front-rear directions.

  FIG. 4 is a schematic configuration diagram of the automatic leveling device 13. In FIG. 4, the automatic leveling device 13 includes a height sensor 14 that is linked to the distance between the upper frame 4 and the lower frame 5, an air valve 16 that operates according to the amount detected by the height sensor 14, and an air valve 16. And a compressor 17 connected to one port. An air spring 7 is connected to the other port of the air valve 16.

  When the height sensor 14 detects a change in the distance between the upper frame 4 and the lower frame 5, the air valve 16 supplies and exhausts air to the air spring 7 in accordance with the change amount. When the above distance becomes a predetermined distance, the supply / exhaust is automatically stopped. As described above, the level of the upper frame 4 is automatically maintained by the automatic leveling device 13, so that the upper frame 4 is not inclined depending on the position on which the conveyed product 26 is placed.

Next, the configuration of the transportation shock reduction device 28A will be described.
In FIG. 1, the shock reduction device 28 for transportation has a mounting surface 6 on which the vibration isolating pallet 2 is placed, and the transported object 26 is placed on the anti-vibration pallet 2 in the horizontal direction. When the acceleration α is applied, the mounting surface 6 is inclined in a direction that reduces the acceleration component parallel to the mounting surface 6 that acts on the transported object 26.

  In this embodiment, the transportation shock reduction device 28A includes a guide rail 29 extending in the horizontal acceleration α direction and a mounting table 32 having the mounting surface 6 and movable on the guide rail 29. The guide rail 29 has a rail shape in which the front in the moving direction of the mounting surface 6 is relatively high and the rear is relatively low when the mounting table 32 moves in the horizontal acceleration α direction. The guide rail 29 is supported by a rail mount 31 installed on the floor of the container 19.

  In FIG. 1, the 1st structural example of the guide rail 29 is shown. The guide rail 29 of the first configuration example is connected to each of the linear rail portion 29a extending in the horizontal acceleration α direction and both ends of the linear rail portion 29a, and the rail height increases as the horizontal distance from both ends increases. It consists of the curved rail parts 29b and 29c which curve so that it may become. When the curved rail portions 29b and 29c have an arc shape, the natural period determined by the radius of the arc is sufficiently large so as not to resonate with an impact, vibration, or the like input from a transportation means such as a truck, an aircraft, or a ship. It should be set to a numerical value. Further, the guide rails 29b and 29c may have a shape that increases linearly toward the end, such as a V-shape.

  The mounting table 32 is provided with first and second guide blocks 33 and 34 that are slidable on the guide rail 29 so as to be separated from each other in the direction in which the guide rail 29 extends. In the configuration example of FIG. 1, the length of the straight rail portion 29 a is set to be the same as the distance between the first guide block 33 and the second guide block 34, but various conditions such as an assumed horizontal acceleration are assumed. Depending on the distance, it may be longer or shorter than the above-mentioned separation distance. Further, the guide block may be a wheel with a lift prevention mechanism.

  The first guide block 33 and the second guide block 34 are rotatably attached to the mounting table 32 via bearings 35. The bearing 35 has a structure in which cylindrical rollers are alternately arranged on a 90 ° V-groove rolling surface through spacer retainers, and loads in all directions such as radial load, axial load and moment load are applied. A cross roller ring that can be used is suitable.

  Next, the operation of the transportation shock reduction device 28A configured as described above will be described with reference to FIGS.

In the state where the vibration isolating pallet 2 on which the conveyed product 26 is placed is placed on the shock reducing device 28 for transportation, acceleration α in the horizontal direction (acceleration due to inertial force) acts on the conveyed matter 26 by acceleration / deceleration of the transportation means. Then, as shown in FIG. 5, the conveyed product 26 moves in the direction of the acceleration α together with the anti-vibration pallet 2 and the mounting table 32. With this movement, the placement surface 6 is inclined with respect to the horizontal plane, so that the resultant force α _C of the horizontal acceleration α and the gravitational acceleration G approaches the placement surface 6 perpendicularly. Thereby, the acceleration which acts on the horizontal direction of the conveyed product 26 can be reduced significantly.

  Further, according to the configuration of the present embodiment, each guide block 33, 34 is rotatably attached to the mounting table 32, so that when the mounting table 32 moves along the guide rail 29, the guide block 33, 34 freely rotates with respect to the mounting table 32. Thereby, the guide blocks 33 and 34 can move on the guide rail 29 smoothly.

  Further, when the aircraft is tilted during take-off and landing, as shown in FIG. 6, the mounting surface 6 automatically changes the relative attitude with respect to the aircraft in a direction to cancel the aircraft tilt (angle θ). The mounting surface 6 can be maintained substantially horizontal. Thereby, since the component force of gravitational acceleration does not act in the lateral direction of the transported object 26, it is possible to prevent the acceleration from acting in the lateral direction of the transported object 26 when the aircraft is inclined during takeoff and landing.

  Instead of the guide rail 29 described above, the guide rail 30 of the second configuration example shown in FIG. 7 may be adopted. Unlike the guide rail 29 of the first configuration example having the linear rail portion 29a, the guide rail 30 of the second configuration example does not have the linear rail portion 29a, and has a rail shape that is curved so as to protrude downward. Have. In order to make the movement of the guide blocks 33 and 34 smooth, the curve of the guide rail 30 is preferably an arc shape. The curvature or curvature is set to an appropriate value in accordance with various conditions such as the assumed horizontal acceleration magnitude.

Next, a second embodiment of the present invention will be described.
FIG. 8 is a diagram showing a configuration of a vibration isolator 1B according to the second embodiment of the present invention, in which (A) is an overall side view, (B) is a BB arrow view, and (C) is a partially enlarged view. FIG. In FIG. 8, the vibration isolator 1 is installed inside the container 19. The vibration isolator 1B includes a vibration isolating pallet 2 and a transport shock reducing device 28B. The anti-vibration pallet 2 has the same configuration as that of the first embodiment.

  8A and 8B, the transportation shock reduction device 28B has a placement surface 6 on which the conveyed product 26 is placed. The mounting surface 6 is preferably substantially horizontal in the state where the transport container 19 is stationary. Further, the transport shock reducing device 28B is configured such that the mounting surface 6 tilts in a direction in which the acceleration component parallel to the mounting surface 6 is reduced by the horizontal acceleration α acting on the conveyed product 26.

  8A and 8B, a transportation shock reducing device 28B according to the present invention includes a mounting table 38 having a mounting surface 6, a hanging means 39 for supporting the mounting table 38 in a suspended manner, and the lifting means 39. A hanging point moving device 40 for moving one or both of the upper end and the lower end in the horizontal direction is provided.

  The suspension means 39 includes a first suspension member 39a and a second suspension member 39b that suspend and support the mounting table 38 at positions separated from each other in the horizontal acceleration α direction. In the present embodiment, two first suspending members 39a and two second suspending members 39b are provided in a horizontal right-angle direction (horizontal direction in FIG. 8B) with respect to the horizontal acceleration α, for a total of four. The mounting table 38 is suspended and supported by a suspension material.

  The lower ends of the first suspension member 39a and the second suspension member 39b are connected to the mounting table 38 so as to be swingable. The upper ends of the first suspending material 39a and the second suspending material 39b swing to a portion (a ceiling frame of the container 19) located above the mounting table 38 in the structure (container 19) where the shock reduction device 28B for transportation is installed. It is linked movably.

  The upper ends of the first and second suspension members 39a, 39b are connected to the ceiling of the transport container 19 via flexible connection means, and the lower ends of the suspension members 39a, 39b are connected to the mounting table 38 via flexible connection means. ing. In the configuration example of FIG. 8, the flexible coupling means is a universal joint, but other flexible coupling means such as a spherical bearing may be used. Moreover, you may comprise the suspension material itself with a wire or a rope, and you may connect an upper end and a lower end so that rocking is possible respectively.

  In this example, the first and second suspension members 39a and 39b incorporate springs and dampers, and function as shock absorbers that mitigate vertical vibration and acceleration acting on the mounting table 38. It has become. Further, a shock absorber 41 that connects the lower portion of the mounting table 38 and the transport container 19 is provided, so that horizontal vibration and acceleration acting on the mounting table 38 are reduced.

  The suspending point moving device 40 has an upper end of the suspending means 39 so that the first suspending member 39a and the second suspending member 39b are in a C-shaped posture when viewed from the horizontal side surface orthogonal to the horizontal acceleration α direction. Move one or both of the bottom edges horizontally. In the configuration example of FIG. 8, the upper ends of the first and second suspension members 39a and 39b can be moved in the horizontal direction by a linear guide and a feed screw (not shown).

  Next, with reference to FIG. 9, operation | movement of the shock reduction apparatus 28B for transport in this embodiment is demonstrated. In FIG. 9, (A) shows a stationary state, and (B) shows a state in which the acceleration α in the left-right direction is applied.

  As shown in FIG. 9A, in the stationary state, the hanging point moving device 40 causes the first and second hanging members 39a and 39b to have a C-shape when viewed from the horizontal side surface orthogonal to the acceleration α direction. The upper ends of the first and second suspension members 39a and 39b are moved in the horizontal acceleration α direction (left and right in the drawing) so as to be in the posture.

  In this stationary state (A), the inclination angles (15 degrees in this figure) of the first and second suspension members 39a and 39b are arbitrarily set according to the expected acceleration α. In addition, it is preferable that the left and right suspension members maintain parallel to the left and right when viewed from the side surface (acceleration α direction) in FIG. However, in the case of receiving acceleration also in the lateral direction, it may be similarly inclined in a letter C shape.

  When the acceleration α acts on the stationary state (A), the state shifts to the state shown in FIG. In this case, the second suspension member 39b on the downstream side (left side in the figure) on which the acceleration α acts swings in the direction of the acceleration α around the upper end (about 10 degrees in this figure), and the lower end is stationary. It rises from (A). Similarly, the first suspension member 39a on the upstream side (right side in the figure) on which the acceleration α acts swings in the direction of the acceleration α around the upper end (about 10 degrees in this figure), and its lower end is in a stationary state. It descends from (A).

  As a result, the mounting table 38 rises on the front side (left side in the figure) in the acceleration α direction and falls on the rear side (right side in the figure) in the acceleration α direction. The mounting surface 6 is inclined in the direction of reduction (about 5 degrees in this figure).

  As described above, in the present invention, the mounting table 38 is suspended from the ceiling frame of the transport container 19 by the suspension means 39. As shown in the example of the truck, the suspending means 39 is inclined in a letter C in the traveling direction and becomes vertical in the cross section in the perpendicular direction. Since both ends of the first and second suspension members 39a and 39b are connected to the ceiling frame of the container 19 and the mounting table 38 by flexible connecting means, the mounting table 38 can move in the axial direction and the right-angle direction.

  The first and second suspension members 39a and 39b are preferably rod-shaped, but may be rope-shaped depending on the weight of the mounting table 38 and the weight of the conveyed product 26. In addition, a spring and a damper may be provided between the mounting table 38 and the first and second suspension members 39a and 39b to adjust the vibration frequency and damping of the mounting table 38.

  According to the vibration isolator 1B of the present embodiment, since the vibration isolating pallet 2 is provided, it is not necessary to adjust the natural frequency even if the weight of the conveyed product 26 changes, as in the first embodiment. The gantry will not be tilted depending on the position on which it is placed.

  9A and 9B, the shock reduction device 28B for transportation is a swing (pendulum) suspended from the suspension point 43 in a pseudo manner, and thus moves in the horizontal direction as a whole, thereby generating horizontal vibration. Can be absorbed.

  Further, since the first suspension member 39a and the second suspension member 39b are inclined so as to have a C-shaped posture, the mounting table 38 moves in the horizontal direction when receiving the acceleration α in the horizontal direction. . Along with this movement, the placement surface 6 of the conveyed product 26 is inclined with respect to the horizontal plane, so that the resultant force of the horizontal acceleration α and the gravitational acceleration G approaches the placement surface 6 perpendicularly. Thereby, the acceleration which acts on the horizontal direction of the conveyed product 26 can be reduced significantly.

  Further, when the aircraft is tilted during take-off and landing, as in the first embodiment (FIG. 6), the placement surface 6 automatically changes the relative attitude with respect to the aircraft in the direction of canceling the aircraft tilt. The mounting surface 6 can be maintained substantially horizontal. Thereby, since the component force of gravitational acceleration does not act in the lateral direction of the transported object 26, it is possible to prevent the acceleration from acting in the lateral direction of the transported object 26 when the aircraft is inclined during takeoff and landing.

  Further, by providing a spring between the first and second suspension members 39a and 39b and the mounting table 38, the natural frequency can be optimized, and the installation position does not disturb the space. Further, an attenuator (damper) can be arranged between the suspension material and the mounting table 38 to optimize the attenuation, and the installation position does not hinder the space.

Next, a third embodiment of the present invention will be described.
10A and 10B are diagrams showing the configuration of a vibration isolator 1C according to the third embodiment of the present invention, in which FIG. 10A shows a stationary state and FIG. 10B shows an operating state in which acceleration α is applied. In FIG. 10, the vibration isolator 1C is installed at a predetermined installation location in the transportation means. The installation location is not particularly limited as long as it is a location where vertical and horizontal vibrations and horizontal acceleration occur, such as inside a container, cargo compartment of a ship or aircraft, and a truck bed.

The vibration isolator 1C includes a vibration isolating pallet 2 and a transport shock reducing device 28C. The anti-vibration pallet 2 has the same configuration as that of the first embodiment.
As shown in FIG. 10, the transportation shock reduction device 28 </ b> C includes a mounting table 45 having a mounting surface 6 on which the anti-vibration pallet 2 is mounted, and an arc guide mechanism 46 that variably supports the posture of the mounting table 45. It is preferable that the mounting surface 6 is a substantially horizontal surface in a state where it is left standing.

  The arc guide mechanism 46 includes an oscillating portion 47 and an oscillating portion 47 that are oscillatable around an oscillating center a located above the mounting surface 6 in the longitudinal direction of the acceleration α along the arcuate guide 47a. And a support frame 48 that is swingably supported.

The mounting table 45 is supported by a swinging portion 47. The shape of the arcuate guide 47a provided in the swinging portion 47 coincides with an arc centered on a.
In the configuration example of FIG. 10, the support frame 48 includes a base frame 50 and a plurality of freely rotatable rollers 49 that are installed on the base frame 50 and support the swinging portion 47 along the arcuate guide 47 a.

The arc guide mechanism 46 is not limited to the configuration example of FIG. 10, and the roller 49 may be guided by the arc guide 47 a by reversing the vertical relationship between the arc guide 47 a and the roller 49.
Further, similarly to FIG. 8, a shock absorber (not shown) for connecting the lower part of the base gantry 50 and the transport container 19 is provided, and the horizontal vibration and acceleration acting on the base gantry 50 are alleviated. preferable.

  According to the vibration isolator 1C of the present embodiment, since the vibration isolating pallet 2 is provided, it is not necessary to adjust the natural frequency even if the weight of the conveyed product 26 changes, as in the first embodiment. The gantry will not be tilted depending on the position on which it is placed.

  Further, since the mounting table 45 is swingably supported by the arc guide mechanism 46, when the transported object 26 receives the acceleration α in the horizontal direction, the mounting table 45 is moved as shown in FIG. Move horizontally. Along with this movement, the placement surface 6 of the conveyed product 26 is inclined with respect to the horizontal plane, so that the resultant force of the horizontal acceleration α and the gravitational acceleration G approaches the placement surface 6 perpendicularly. Thereby, the acceleration which acts on the horizontal direction of the conveyed product 26 can be reduced significantly.

  In this case, when the inertial force is applied for a long time, the movement amount may be too large. In such a case, it is preferable to limit the amount of movement so as to fall within a predetermined allowable range and to control the force when hitting the stopper.

  Further, when the aircraft is tilted during take-off and landing, as in the first embodiment (FIG. 6), the placement surface 6 automatically changes the relative attitude with respect to the aircraft in the direction of canceling the aircraft tilt. The mounting surface 6 can be maintained substantially horizontal. Thereby, since the component force of gravitational acceleration does not act in the lateral direction of the transported object 26, it is possible to prevent the acceleration from acting in the lateral direction of the transported object 26 when the aircraft is inclined during takeoff and landing.

Next, a fourth embodiment of the present invention will be described.
11A and 11B are diagrams showing the configuration of a vibration isolator 1D according to the fourth embodiment of the present invention, in which FIG. 11A shows a stationary state and FIG. 11B shows an operating state in which acceleration α is applied. In FIG. 11, the vibration isolator 1 is installed at a predetermined installation location in the transportation means. The installation location is not particularly limited as long as it is a location where vertical and horizontal vibrations and horizontal acceleration occur, such as the inside of the container 19, the cargo compartment of a ship or aircraft, and the truck bed.

The vibration isolator 1D includes a vibration isolating pallet 2 and a transport shock reducing device 28D. The anti-vibration pallet 2 has the same configuration as that of the first embodiment.
As shown in FIG. 11, the transportation shock reduction device 28 </ b> D includes a mounting table 52 having a mounting surface 6 on which the anti-vibration pallet 2 is mounted, and an inclination guide mechanism 53 that variably supports the posture of the mounting table 52. It is preferable that the mounting surface 6 is a substantially horizontal surface in a state where it is left standing.

  The inclination guide mechanism 53 has two linear inclination guides 54a and 54b that are opposite to each other in the front and rear of the horizontal acceleration α direction, and the acceleration of the mounting surface 6 when moving together with the mounting table 52 in the horizontal acceleration α direction. The mounting table 52 is tilted so that the front in the α direction rises and the rear falls. The linear inclination guides 54a and 54b are provided in the swinging portion 54 that supports and swings the mounting table 52, and are inclined in a reverse C shape when viewed from the horizontal side surface orthogonal to the horizontal acceleration α direction. Yes.

  The tilt guide mechanism 53 includes a support base 56 that supports the swinging portion 54 so as to be swingable. In the configuration example of FIG. 11, the support frame 56 includes a base frame 58 and a plurality of freely rotatable rollers 57 that are installed on the base frame 58 and support the swinging portion 54 along the linear inclined guides 54 a and 54 b. .

The tilt guide mechanism 53 is not limited to the configuration example of FIG. 11, and the linear tilt guides 54a and 54b may guide the roller 57 by reversing the vertical relationship between the linear tilt guides 54a and 54b and the roller 57. .
Further, similarly to FIG. 8, a shock absorber (not shown) that connects the lower portion of the base pedestal 58 and the shipping container 19 is provided to reduce horizontal vibration and acceleration acting on the base pedestal 58. preferable.

  According to the vibration isolator 1D of the present embodiment, since the vibration isolating pallet 2 is provided, it is not necessary to adjust the natural frequency even if the weight of the conveyed object 26 changes, as in the first embodiment, and the conveyed object 26 The gantry will not be tilted depending on the position on which it is placed.

  Further, since the mounting table 52 is swingably supported by the tilt guide mechanism 53, when the transported object 26 receives the horizontal acceleration α, the mounting table 52 is moved as shown in FIG. Move horizontally. Along with this movement, the placement surface 6 of the conveyed product 26 is inclined with respect to the horizontal plane, so that the resultant force of the horizontal acceleration α and the gravitational acceleration G approaches the placement surface 6 perpendicularly. Thereby, the acceleration which acts on the horizontal direction of the conveyed product 26 can be reduced significantly.

  In this case, when the inertial force is applied for a long time, the movement amount may be too large. In such a case, it is preferable to limit the amount of movement so as to fall within a predetermined allowable range and to control the force when hitting the stopper.

  In addition, when the aircraft is tilted during take-off and landing, as in the first embodiment (FIG. 6), the mounting surface 6 automatically changes the relative posture with respect to the aircraft in the direction of canceling the aircraft tilt. The mounting surface 6 can be maintained substantially horizontal. Thereby, since the component force of gravitational acceleration does not act in the lateral direction of the transported object 26, it is possible to prevent the acceleration from acting in the lateral direction of the transported object 26 when the aircraft is inclined during takeoff and landing.

  Although the embodiments of the present invention have been described above, the embodiments of the present invention disclosed above are merely examples, and the scope of the present invention is not limited to these embodiments. . The scope of the present invention is indicated by the description of the scope of claims, and further includes meanings equivalent to the description of the scope of claims and all modifications within the scope.

It is a figure which shows the whole structure of the vibration isolator concerning 1st Embodiment of this invention. It is the A section enlarged view of FIG. It is a top view which shows the arrangement structure of the air spring and automatic leveling apparatus in the vibration isolating pallet of this invention. It is a schematic block diagram of the automatic leveling apparatus in the vibration isolating pallet of this invention. It is a figure explaining operation | movement of the shock reduction apparatus for transport in the vibration isolator which concerns on 1st Embodiment of this invention. It is another figure explaining operation | movement of the shock reduction apparatus for transportation in the vibration isolator concerning 1st Embodiment of this invention. It is a figure which shows another structural example of the shock reduction apparatus for transportation in the vibration isolator concerning 1st Embodiment of this invention. It is a figure which shows the whole structure of the vibration isolator concerning 2nd Embodiment of this invention. It is a figure explaining operation | movement of the vibration isolator concerning 2nd Embodiment of this invention. It is a figure which shows the structure and operation | movement of a vibration isolator concerning 3rd Embodiment of this invention. It is a figure which shows the structure and operation | movement of a vibration isolator concerning 4th Embodiment of this invention. It is a figure which shows the structure of the conventional anti-vibration pallet.

Explanation of symbols

1A to 1D Vibration isolation device 2 Vibration isolation pallet 3 Pallet body 4 Upper frame 5 Lower frame 6 Placement surface 7 Diaphragm type air spring 8 Diaphragm 8a Outer part 8b Inner part 9 Upper holding material 9a Connection hole 10 Lower holding material 11 Air chamber 12 Air piping 13 Automatic leveling device 14 Height sensor 16 Air valve 17 Compressor 20 Leg 21 Laminated rubber 23, 24 Air chambers 25a, 25b Connection hole 26 Conveyed material 28 Shock reduction device 29 for transport 29 Guide rail 29a Straight rail 29b Curved rail Part 30 Guide rail 31 Rail mount 32 Mounting table 33, 34 Guide block 35 Bearing 38 Mounting table 39 Lifting means 39a First lifting material 39b Second lifting material 40 Hanging point moving device 41 Shock absorber 45 Mounting table 46 Arc guide mechanism 47 Oscillating part 47a Arc guide 48 Support frame 49 roller 50 base mount 52 mounting table 53 inclined guide mechanism 54 swing unit 54a, 54b linearly inclined guide 56 support cradle 57 roller 58 base mount

Claims (14)

A pallet body composed of an upper frame and a lower frame arranged at intervals in the vertical direction;
A diaphragm type air spring disposed between the upper frame and the lower frame and supporting a load from the upper frame and suppressing vertical and horizontal vibrations from the lower frame. Anti-vibration pallet.   The anti-vibration pallet according to claim 1, wherein an air chamber is formed in one or both of the upper frame and the lower frame, and the inside of the diaphragm air spring communicates with the air chamber.   The anti-vibration pallet according to claim 2, wherein the upper frame and the lower frame in which the air chamber is formed are honeycomb structure panels.   The air chamber is formed in both the upper frame and the lower frame, and the air chambers of the upper frame and the lower frame are connected by a flexible air pipe. Anti-vibration pallet.   The anti-vibration pallet according to any one of claims 1 to 4, wherein a laminated rubber is disposed between the diaphragm air spring and the upper frame or between the diaphragm air spring and the lower frame. A plurality of the diaphragm type air springs are installed at positions separated from each other;
Further, the distance is automatically provided so that the distance is constant based on an output of a height sensor that is attached to each of the plurality of diaphragm type air springs and interlocks with the distance between the upper frame and the lower frame. The anti-vibration pallet according to claim 1, further comprising an automatic leveling device that adjusts an air pressure of the diaphragm type air spring. Anti-vibration pallet according to any one of claims 1 to 6,
A description above, which has a mounting surface for placing the vibration isolating pallet and acts on the conveyed object when a horizontal acceleration acts on the conveyed object while the conveyed object is mounted on the vibration isolating pallet. An anti-vibration device comprising: a transportation shock reduction device configured to tilt the mounting surface in a direction to reduce an acceleration component parallel to the mounting surface. The transport shock reducing device includes a guide rail extending in the horizontal acceleration direction, and a mounting table having the mounting surface and movable on the guide rail.
The guide rail has a rail shape such that when the mounting table moves in the horizontal acceleration direction, the front in the moving direction of the mounting surface is relatively high and the rear is relatively low. The vibration isolator as described.   The guide rail is connected to each of both ends of the linear rail portion extending in the horizontal acceleration direction and curved so that the rail height increases as the horizontal distance from the both ends increases. The vibration isolator according to claim 8, comprising a rail portion.   The vibration isolator according to claim 8, wherein the guide rail has a rail shape that is curved so as to be convex downward. The mounting table includes a first guide block and a second guide block that are slidable on the guide rail and are separated from each other in the direction in which the guide rail extends.
The vibration isolator according to any one of claims 8 to 10, wherein the first guide block and the second guide block are rotatably attached to the mounting table. The transport shock reducing device includes a mounting table having the mounting surface described above, a suspension means for hanging and supporting the mounting table, and a suspension point movement for horizontally moving one or both of the upper end and the lower end of the suspension means. An apparatus,
The suspension means includes a first suspension member and a second suspension member that suspend and support the mounting table at positions spaced forward and backward in the horizontal acceleration direction, and the first suspension member and the second suspension member. The lower ends of the first suspension member and the second suspension member are swingably connected to the mounting table, and the upper ends of the first suspension member and the second suspension member are located above the mounting table in the structure in which the transportation shock reduction device is installed. It is connected to the position where it can swing,
The suspending point moving device has an upper end of the suspending means so that the first suspending material and the second suspending material have a C-shape when viewed from a horizontal side surface orthogonal to the horizontal acceleration direction. The vibration isolator according to claim 7, wherein one or both of the lower ends are moved in the horizontal direction. The transport shock reducing device includes a mounting table having the mounting surface described above, and an arc guide mechanism that variably supports the posture of the mounting table,
The anti-vibration device according to claim 7, wherein the arc guide mechanism includes a swinging portion that is swingable around a swing center that is above the placement surface before and after the horizontal acceleration direction along the arc-shaped guide. apparatus. The transport shock reducing device includes a mounting table having the mounting surface, and an inclination guide mechanism that variably supports the posture of the mounting table,
The tilt guide mechanism has two linear tilt guides that are opposite to each other before and after the horizontal acceleration direction. When the tilt guide mechanism moves in the horizontal acceleration direction together with the mounting table, the front in the movement direction rises and the rear is The vibration isolator according to claim 7, wherein the mounting table is tilted so as to descend.

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