KR20070090083A - Seismic isolation apparatus for loading/unloading machine - Google Patents

Abstract

A seismic isolation apparatus for loading/unloading a machine is provided to perform a seismic isolation function by using a shear pin as a trigger unit for the seismic isolation. A seismic isolation apparatus for loading/unloading a machine includes a cross linear bearing(54), a rubber laminate(56), and a shear pin(58). The cross linear bearing includes linear bearings(60,62). The linear bearings are crossed in an X-direction and a Y-direction for moving the cross linear bearing in two orthogonal directions. The X-direction is orthogonal to the moving direction of an unloader. The Y-direction is the same with the moving direction of the unloader. The rubber laminate is a structure that a plurality of rubber sheets and a steel plate are laminated between a lower flange and an upper flange. The shear pin sustains the steel structure of a travelling part(30) and a leg part(20) during usual unloading operation. The shear pin is constructed to initiate the seismic isolation when a predetermined amount of weight is applied by the vibration with more than a certain seismic intensity.

Description

Seismic isolation device of unloading machine {SEISMIC ISOLATION APPARATUS FOR LOADING / UNLOADING MACHINE}

1 is a perspective view showing the overall structure of a mechanical continuous unloader,

FIG. 2 is a perspective view showing the feeder structure of the unloader shown in FIG. 1; FIG.

3 is an enlarged perspective view showing the configuration of an isolator according to the embodiment of the first embodiment;

4 is an assembled perspective view of the seismic isolator shown in FIG.

5 is an enlarged perspective view showing the configuration of an isolating apparatus according to the form of the second embodiment;

6 is an enlarged perspective view showing the configuration of an isolating apparatus according to the form of the third embodiment.

<Explanation of symbols for main parts of drawing>

10: Unloader 12: Unloader main body

20: leg 26: running rail

30: driving unit 50, 70, 90: seismic isolation device

52: mounting table 54: cross linear bearing

56,92,94: Laminated rubber 58: Shear pin

60,62: Linear Bearing 61,63: Linear Rail

72,74: Oil Damper

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic isolator of an unloading machine, and more particularly, to an isolating apparatus installed in an unloading machine such as a mechanical continuous unloader for discharging grains such as grains from a ship. will be.

In general, the mechanical continuous unloader scrapes grains such as grains stored in cargo warehouses by an excavation device such as a feeder, and carries the scraped grains by a conveying device such as an attached conveyor installed inside the vertical boom and horizontal boom. It is a device that lands on a ship.

Unloading machines, such as mechanical continuous unloaders, are installed on the inner wall and move along the running rails installed parallel to the inner wall to load the grain in each cargo hold of the ship.

As a countermeasure against earthquakes for such unloading machines, according to the crane structural standard determined by the Ministry of Health, Labor and Welfare, a method of applying a seismic strengthening crane that can cope with 0.25G or more for a design having a horizontal dynamic load of 0.2G or more is adopted.

1 is a perspective view showing the entire structure of a mechanical continuous unloader (hereinafter, abbreviated as "unloader").

The unloader 10 shown in the same drawing mainly consists of the unloader main body 12, the horizontal boom 14, the vertical boom 16, and the feeder 18, and the unloader main body 12 is the leg part 20 , 20, a travel frame 22, and a swing frame 24.

The lower part of the leg part 20 is provided with the traveling part 30 provided with the wheels 28 and 28 mounted on the traveling rail 26. Accordingly, the unloader 10 may move along a traveling rail 26, 26 to a predetermined position.

The revolving frame 24 is pivotally installed on the upper part of the traveling frame 22 via a revolving seat 32 (v). The horizontal boom 14 is freely supported on the upper end of the revolving frame 24, and the vertical boom 16 is swing freely installed at the tip of the horizontal boom 14. In addition, inside the horizontal boom 14 and the vertical boom 16, the attached conveyor 38 shown in FIG. 2 which conveys grains 36, such as a grain in the dock 34, is provided. The grains 36 in the dock 34 are conveyed by the attachment conveyor 38 from the tip of the vertical boom 16 to the land.

In normal grain loading, the swing frame 24 shown in FIG. 1 is rotated to the sea side, and the horizontal boom 14 is unloaded at approximately right angles to the quay wall 40. In addition, since the vertical boom 16 is far from the turning center, the counter weight 42 is attached to the land side end of the horizontal boom 14 with respect to the turning center O, so that the balance is preserved.

The feeder 18 is provided in the lower end of the vertical boom 16, and is comprised so that the grain 36 in the dock 34 may be scraped and moved to the attached conveyor 38 of the vertical boom 16.

On the other hand, a braided feeder is known as a feeder that excavates and scrapes off grains 36 having poor fluidity. The braided feeder 18 shown in FIG. 2 is comprised by combining the braids 44, 44 ... which turn in the horizontal direction on the outer periphery of the rotary blade type feeder, and destroy the grain 36. As shown in FIG. The grains 36 collapsed by the braids 44, 44, ... are transferred to the rotor 48 by the screws 46 and jump along the guide plate 49 by the rotation of the rotor 48. 38 is supplied. In addition, in the case of loading a grain having good fluidity or the like, a rotary blade type feeder having a structure in which the braids 44, 44, ... are removed is used.

By the way, as mentioned above, as a countermeasure against an input seismic wave, the conventional seismic strengthening crane which has a seismic resistance of 0.25 G or more of horizontal dynamic load was designed. In addition, methods such as checking the conduction moment when 0.25G is added by the balance of the vertical boom 16 and the counterweight 42 for each posture of each of the booms 14 and 16 have been adopted.

In addition, recently, when the seismic strengthening crane with horizontal dynamic load of 0.25G or more is installed on the seismic strengthening quay wall designed with the horizontal progress coefficient of 0.25G or more, the dynamic acceleration result of the response acceleration is 0.5G or more. In addition, even when the seismic-enhanced crane is seismically strengthened, a locking phenomenon in which the leg part 20 floats is generated, and it is estimated that the seismic-reinforced crane is damaged by the impact at the time of landing.

Patent Documents 1, 2, and 3 disclose examples of installing a seismic isolator in an unloading machine in order to suppress the horizontal dynamic load to 0.25 G or less from this problem and to suppress the locking phenomenon. The unloading machines disclosed in Patent Literatures 1 to 3 are provided with a seismic isolator at the leg portion and the turning table of the main body of the unloading machine.

Patent Document 1: Patent Publication No. 2003-4097

Patent Document 2: Patent Publication No. 2003-54870

Patent Document 3: Patent Publication No. 2004-210546

However, although the seismic isolation device of Patent Document 1 is a simple structure, it is possible to grasp in detail the characteristics (intrinsic value, center position, etc.) of the unique device of each unloading machine to be installed, and to adjust the spring constant of the seismic isolation device and to receive a vertical load. There is a drawback that design and manufacturing are time consuming because of the detailed settings required to determine the size of the contact surface. Moreover, since the seismic isolation device of patent document 2 is based on the hydraulic unit of a complicated structure, there existed a problem that manufacturing cost was high. Moreover, although the seismic isolator of patent document 3 is comprised with a spring mechanism, a movable connection mechanism, and a damper, the structure of a movable connection mechanism is complicated by a 1st turning bearing, a 2nd turning bearing, and a crane body coupling part, and with respect to a rail It was a device mainly dealing with seismic motion in the vertical direction.

This invention is made | formed in view of such a situation, Comprising: It aims at providing the seismic isolation apparatus of the unloading machine which can exhibit safe vibration damping performance with a simple structure.

In order to achieve the above object, the invention as set forth in claim 1 is freely installed to move and move along a traveling rail in an unloading machine, such as a mechanical continuous unloader, which unloads grains, such as grains, from a ship. In an unloading machine provided with a seismic isolator between running parts, the seismic isolator supports the unloading machine body so as to be slidably movable in two directions orthogonal to each other by a linear rolling bearing that operates linearly with respect to the running part. An XY table, laminated rubber for connecting the unloading machine main body and the traveling part and attenuating the horizontal vibration of the unloading machine main body with respect to the running part, and connecting the unloading machine main body and the running part with a constant load It is characterized by consisting of a shear pin (shear pin) to break the ground.

According to the invention of Claim 1, the XY table comprised so that the member which receives a load in a vertical direction, and the linear bearing which is a linear rolling bearing which runs linearly as a horizontal moving mechanism can cross and orthogonally move so that it may move in two orthogonal directions. Is installed on the upper part of the moving part in the orthogonal direction and the direction along the running rail with respect to the running rail, and the seismic isolating function is applied to the restoring mechanism and the damping mechanism of the unloading machine body with respect to the running part. As a trigger mechanism for exerting the structure, for example, a shear pin made of carbon steel for mechanical structure is used, and thus, it is possible to exhibit stable vibration damping performance with a simple configuration.

The invention described in claim 2 is characterized in that the X-Y table is provided with a damper that suppresses and attenuates the horizontal vibration of the main body of the unloading machine relative to the traveling portion.

According to the invention described in claim 2, the damper provided on the XY table suppresses the horizontal vibration of the main body of the unloading machine with respect to the traveling part, thereby reducing the load on the laminated rubber and improving the damping function of the laminated rubber. .

In order to achieve the above object, the invention as set forth in claim 3 is freely installed to move and move along the traveling rail in an unloading machine such as a mechanical continuous unloader for discharging grains such as grains from a ship. In an unloading machine provided with a seismic isolator between running parts, the seismic isolator supports slide-moving in two directions orthogonal to each other by a linear rolling bearing which drives the main body of the unloading machine with respect to the running part. An XY table, a damper mounted on the XY table to suppress and attenuate horizontal vibration of the main body of the unloading machine with respect to the traveling part, and to connect the main body of the unloading machine and the running part, and a constant load is applied thereto. It is characterized by consisting of the shear pin to break the ground.

According to the invention set forth in claim 3, traveling is carried out using an XY table configured to be movable in two directions orthogonal to each other by intersecting a linear member which is a linear rolling bearing that operates linearly as a moving mechanism in a horizontal direction and a member receiving a load in the operation direction. It is installed on the upper part of the moving part in the direction of orthogonal direction and the running rail with respect to the rail, and it is installed on the upper part of the rail to suppress vibration in the horizontal direction of the main body of the unloading machine with respect to the moving part, As a trigger mechanism for exhibiting a seismic isolation function, for example, a sheath pin made of carbon steel for mechanical structure is used, so a stable vibration suppression performance can be achieved with a simple configuration.

The invention according to claim 4 is characterized in that the laminated rubber is provided between the main body of the unloading machine and the X-Y table to receive the vertical load of the main body of the unloading machine and to damp vibration in the vertical direction.

According to the invention described in claim 4, since the laminated rubber provided on the X-Y table receives the vertical load of the main body of the unloading machine, the load on the X-Y table can be reduced. In addition, the vibration of the unloading machine main body can be attenuated by the laminated rubber, and at the same time, the unloading machine main body can be returned to its original position with respect to the traveling part by the restoring force of the laminated rubber.

EMBODIMENT OF THE INVENTION Hereinafter, preferred embodiment of the seismic isolation device of the unloading machine which concerns on this invention is described according to an accompanying drawing.

3, the structure of the base isolation device 50 of the unloading machine which concerns on 1st Embodiment was shown. The seismic isolator 50 is provided in the unloader 10 shown in FIG. 1, and is provided between the leg 20 and the traveling part 30 of the unloader main body 12 (unloading machine main body). 3, the same or similar member as the unloader 10 shown in FIG. 1 will be described with the same reference numeral.

The seismic isolator 50 is provided between the mounting base 52 of the traveling part 30 and the base part 21 of the leg part 20, and the cross linear bearing 54 and laminated rubber 56 which comprise an XY table are provided. ) And share pins 58.

The cross linear bearing 54 moves the linear bearings 60 and 62, which are linear rolling bearings, which are linearly driven so as to be movable in either direction with respect to the horizontal direction, in the X direction (direction perpendicular to the traveling direction of the unloader 10). ) And the Y-direction (the traveling direction of the unloader 10) are configured to be movable in two directions orthogonal to each other. That is, in the cross linear bearing 54, as shown in FIG. 4, the linear rail 63 of the linear bearing 62 is fixed to the mounting base 52, and the linear rail 61 of the linear bearing 60 is a leg part. It is fixed to the base part 21 of the 20. Accordingly, in the cross linear bearing 54, the linear rail 61 is moved in the X direction with respect to the bearing portion 64, while the bearing portion 64 is moved in the Y direction with respect to the linear rail 63. It can move in either direction. The cross linear bearing 54 also receives a load in the vertical direction of the unloader 10.

The laminated rubber 56 is constituted by laminating a plurality of rubber sheets and steel sheets between the lower flange and the upper flange, and the lower flange is fixed to the mounting table 52 and the upper flange is fixed to the base portion 21. According to the laminated rubber 56, the energy of the earthquake motion is attenuated to generate a restoring force when the unloader main body 12 moves in the horizontal direction. As the rubber sheet of the laminated rubber 56, a rubber sheet containing lead or tin plug may be used to increase the damping performance.

The shear pins 58 are made of carbon steel for the structure, and the lower part is fixed to the mounting table 52 and the upper part is inserted into the hole 21A formed in the base part 21. According to this shear pin 58, the steel frame of the running part 30 and the leg part 20 is hold | maintained at the time of a normal unloading operation, and it breaks when a certain load is applied by the vibration more than a certain magnitude value, and the seismic isolation device 50 is carried out. It is configured so that the isolating function of.

According to the seismic isolator 50 having such a configuration, when a shear load is applied to the shear pins 58 due to the vibration during the earthquake, the shear pins 58 are broken, the cross-linear bearings 54 of the seismic isolator 50 are frozen. The loader main body 12 (see FIG. 1) moves horizontally by the linear action of the cross linear bearing 54, and the laminated rubber 56 attenuates the horizontal movement of the unloader main body 12, thereby absorbing the energy of the earthquake motion. Attenuate Then, the unloader main body 12 is moved back to its original position by the restoring force of the laminated rubber 56.

Thus, according to the base isolation device 50 of this embodiment, it is a simple structure comprised from the cross linear bearing 54, the laminated rubber 56, and the shear pin 58, and attenuates from the information, such as the mass intrinsic value of the structural part to isolate. It is possible to obtain stable vibration damping performance at low cost by obtaining the performance and the restoring performance in advance and setting the laminated rubber suitable for this.

In addition, although the cross linear bearing 54 is constituted by orthogonal to the pair of linear rails 61 and 63, an unloading machine capable of absorbing the input seismic wave parallel to the running rail 26 by traveling of the wheel 28 is possible. In this regard, the linear rails 63 may slide only in the orthogonal direction with respect to the travel rails 26.

In addition, as shown in FIG. 1, when the sea leg 20 of the unloader 10 is connected to the travel frame 22 by a pin 66 so as to be able to swing, a linear bearing is mounted on the travel rail 26. The seismic isolation device slidably installed only in the orthogonal direction is installed only in two of the traveling parts 30 under the strong leg of the leg 20 on the land side, and the restoring force and the damping force are doubled to simplify the device. Is also ok. If it is difficult to produce the laminated rubber 56 in which the restoring force and the damping force are balanced depending on the mass of the unloading machine, an oil damper may be used as the damping mechanism and a spring or the like as the restoring mechanism.

FIG. 5 is an assembly view showing the configuration of the base isolation device 70 according to the second embodiment. The same or similar members as those of the base isolation device 50 shown in FIGS. 3 and 4 are denoted by the same reference numerals, and description thereof will be omitted. do.

The seismic isolator 70 shown in FIG. 5 suppresses the horizontal vibration of the unloader main body 12 with respect to the traveling part 30 with respect to the seismic isolator 50 of FIG. 74; damper).

The main body of the oil damper 72 is fixed to the base 21, and the rod 76 is fixed to the bearing 64 of the bearing 64 of the cross linear bearing 54. Suppresses vibration. In addition, the main body of the oil damper 74 is fixed to the mounting table 52, the rod 78 is fixed to the fixing portion 82 of the bearing portion 64 to suppress the vibration in the Y direction by the damper effect . These oil dampers 72 and 74 can suppress the horizontal vibration of the unloader main body 12 with respect to the traveling part 30, so that the load on the laminated rubber 56 can be reduced and the damping function of the laminated rubber This improves.

In addition, although the example which installed the laminated rubber 56 was demonstrated in embodiment of FIG. 5, you may abbreviate | omit laminated rubber, and the damping and restoration mechanism may be made into the specific structure only by the oil dampers 72 and 74. FIG.

Fig. 6 is an assembly view showing the configuration of the base isolation device 90 according to the third embodiment, and the same reference numerals are given to the same or similar members as those of the base isolation devices 50 and 70 shown in Figs. Omit.

The base isolation device 90 shown in FIG. 6 is provided with laminated rubbers 92 and 94 between the base portion 21 and the cross linear bearing 54 with respect to the base isolation device 70 shown in FIG. 94 receives the vertical load of the unloader main body 12 and attenuates the vibration in the vertical direction.

According to this base isolation device 90, since the laminated rubbers 92 and 94 provided in the cross linear bearing 54 are subjected to the vertical load of the unloader main body 12, the load of the cross linear bearing 54 can be reduced. have. In addition, the vibration of the unloader main body 12 can be attenuated by the laminated rubbers 92 and 94, and at the same time, the unloader main body 12 is moved to the traveling part 30 by the restoring force of the laminated rubbers 92 and 94. You can return to the original position.

In addition, although the example which provided the laminated rubber 56 was demonstrated in embodiment of FIG. 6, you may abbreviate | omit laminated rubber, and the damping and restoring mechanism may be made into the specific structure only by the laminated rubber 92 and 94. FIG.

According to the seismic isolator of an unloading machine according to the present invention, an XY table which is slidably supported in two orthogonal directions by a linearly loaded linearly driven member as a member receiving a load in the vertical direction and a horizontal moving mechanism is used. In addition, the laminated rubber is used as a restoring mechanism and a damping mechanism of the main body of the loading and unloading machine, and a shear pin is used as a trigger mechanism for generating a seismic isolation function.

Claims (4)

In an unloading machine such as a mechanical continuous unloader for discharging grains such as grains from a vessel, the unloading machine is installed freely to move along a running rail and a seismic isolation device is provided between the main body and the unloading machine. The seismic isolator includes an XY table for slidably moving in two directions orthogonal to each other by a linear rolling bearing that linearly drives the unloading machine main body, and the unloading machine main body and the running part. And a laminated rubber for attenuating the horizontal vibration of the main body of the unloading machine with respect to the traveling part, and a shear pin that breaks when a certain load is applied while connecting the main body of the unloading machine with the running part. Seismic isolation device. 2. The seismic isolation device for an unloading machine according to claim 1, wherein the X-Y table is provided with a damper that suppresses and attenuates the horizontal vibration of the main body of the unloading machine with respect to the traveling part. In an unloading machine such as a mechanical continuous unloader for discharging grains such as grains from a vessel, the unloading machine is installed freely to move along a running rail and a seismic isolation device is provided between the main body and the unloading machine. The seismic isolator includes an XY table for slidably moving in two directions orthogonal to each other by a linear rolling bearing that linearly drives the unloading machine main body, and the traveling part is provided on the XY table. And a damper that suppresses the vibration in the horizontal direction of the unloading machine main body at the same time and attenuates it, and a shear pin that breaks when a predetermined load is applied at the same time as connecting the unloading machine main body and the traveling part. Seismic isolation device. The seismic isolation device for an unloading machine according to claim 3, wherein a laminated rubber is provided between the main body of the unloading machine and the X-Y table to receive a vertical load of the main body of the unloading machine and to attenuate the vibration in the vertical direction.

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