JP2013091551A - Ceiling crane and method for repairing ceiling crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ceiling crane which has no restriction from the clearance to a ceiling surface and is assembled with a base isolation unit that reduces the load acting a crane body when earthquake occurs.SOLUTION: The ceiling crane 10 includes: a crane body 11 disposed at a lower part of a ceiling face T inside a building B; a traveling part 12 supporting the crane body 11 and travelling on a rail R; a slide mechanism 13 connecting the traveling part 12 and the crane body 11 enabling relative movements to a width direction perpendicularly crossing the extending direction of the rail R; a trigger mechanism 14 for restricting the relative movement of the traveling part 12 and the crane body 11 while allowing during earthquake; and a recovery and damping mechanism 15 mounted to the crane body 11 with a clearance C2 between the second vertical wall face V2 opposing in the width direction inside the building B and having a coil spring 19 and an oil damper 20.

Description

  The present invention relates to an overhead crane installed near a ceiling in a building and a method for repairing the overhead crane.

  As cranes used for lifting heavy objects, container cranes installed on the quay of the harbor and loading and unloading containers on ships, and installed in container yards where containers are collected while traveling on a traveling lane There are RTGs (rubber tired gantry cranes) that load and unload containers, and overhead cranes that are installed near the ceiling in buildings such as factories and that carry various materials.

  Such a crane is required to have a structure that can endure without collapse or destruction even in the event of a large earthquake. One means for realizing such a structure is the use of a seismic isolation device. That is, a crane that incorporates a seismic isolation device between a crane main body and a traveling device that supports the crane main body and reduces the load acting on the crane main body at the time of a large earthquake has been proposed (for example, , See Patent Document 1). Here, the seismic isolation device employed in the crane is a horizontal slide mechanism that allows the crane body to slide in the horizontal direction relative to the traveling device, a restoring force mechanism that imparts restoring force to the slid crane body, and a crane body And a damping mechanism for damping the vibration.

JP 2009-244202 A

  However, in the crane described in Patent Document 1, it is necessary to secure a space for incorporating the above seismic isolation device between the crane body and the traveling device. Therefore, the crane incorporating the seismic isolation device has a height that is higher than the crane without the seismic isolation device by the height of the seismic isolation device. However, since the overhead crane is installed in a building, there is a limitation on the clearance with the ceiling surface. Therefore, the overhead crane has a problem that it is difficult to incorporate a seismic isolation device between the crane body and the traveling device.

  The present invention has been made in view of such circumstances, and its purpose is to reduce the load acting on the crane body when an earthquake occurs without being limited by the clearance with the ceiling surface. The object is to provide an overhead crane and a method for repairing the overhead crane.

  In order to achieve the above object, the present invention employs the following means. That is, the overhead crane according to the present invention includes a crane main body arranged below a ceiling in a building, a traveling unit that supports the crane main body and can travel on a rail attached to a building, the traveling unit, and the A slide mechanism that is provided between the crane body and connects the traveling unit and the crane body so as to be capable of relative movement in a lateral direction orthogonal to the extending direction of the rail; and the traveling unit by the slide mechanism; Attached to the crane body with a gap between the trigger mechanism that restricts relative movement with the crane body and allows in the event of an earthquake, and the wall surface of the building facing in the lateral direction, and restored in the lateral direction And a restoring / damping mechanism having an elastic element that acts on the force and a damping element that acts on the lateral damping force.

  According to such a configuration, the relative movement between the traveling unit and the crane main body is restrained by the trigger mechanism at the time of cargo handling and traveling of the traveling crane, so that the crane main body travels on the rail together with the traveling unit. Further, since the restoration / damping mechanism is attached to the crane body with a gap between the wall and the interior wall, the traveling of the overhead crane is not hindered by the restoration / damping mechanism contacting the wall.

  On the other hand, when an earthquake occurs, relative movement between the traveling unit and the crane main body is allowed by the trigger mechanism, and thus the crane main body starts relative movement in the lateral direction with respect to the traveling unit. The crane body is subjected to a restoring force by the elastic element and a damping force by the damping element with respect to the relative movement in the lateral direction. Thereby, it is possible to prevent the crane body from being collapsed or damaged.

  In addition, since the restoration / damping mechanism is attached to the crane body with a gap between the wall surface in the building, the height position of the uppermost portion of the crane body does not change even if the restoration / damping mechanism is incorporated.

  The overhead crane according to the present invention is characterized in that the restoring / damping mechanism is attached to the lower surface of the crane body.

  According to such a configuration, the restoration / damping mechanism can be incorporated without affecting the overall height of the overhead crane. In addition, when retrofitting an existing overhead crane to incorporate a restoration / damping mechanism, the crane body is directed toward the ceiling as if a restoration / damping mechanism is to be installed between the crane body and the traveling unit. Since it is not necessary to jack up or the like, it is possible to incorporate it with a simple operation. In addition, the restoration / damping mechanism can be incorporated into the overhead crane in a short time without requiring time for jacking up the crane body.

  The overhead crane according to the present invention is characterized in that the restoration / damping mechanism is attached to a side surface of the crane body.

  According to such a configuration, the restoration / damping mechanism can be incorporated without affecting the overall height of the overhead crane. In addition, when retrofitting and damping mechanisms are retrofitted to existing overhead cranes, the crane body is jacked up toward the ceiling as in the case of incorporating the restoration and damping mechanisms between the crane body and the traveling unit. Since it is not necessary, it can be incorporated in a simple operation. In addition, the restoration / damping mechanism can be incorporated into the overhead crane in a short time without requiring time for jacking up the crane body.

  The overhead crane according to the present invention is characterized in that the slide mechanism is a low-friction sliding material interposed between the crane body and the traveling unit.

  According to such a configuration, the frictional force acting between the crane main body and the traveling portion is reduced due to the presence of the low friction sliding material, so that the crane main body and the traveling portion can be easily moved relative to each other by sliding. Can do.

  The overhead crane according to the present invention is characterized in that the trigger mechanism is a hysteresis type damper that attenuates relative movement between the traveling unit and the crane main body by hysteresis attenuation.

  According to such a configuration, the vibration of the crane body can be damped more efficiently by using the hysteresis damping of the trigger mechanism in addition to the damping action of the restoration / damping mechanism.

  The overhead crane according to the present invention is characterized in that a reinforcing member for reinforcing the wall surface is provided at a position on the wall surface in the building facing the restoration / attenuation mechanism.

  According to such a configuration, even if the crane main body and the traveling unit relatively move laterally in the event of an earthquake, the wall surface of the building is reinforced by the reinforcing panel. It is possible to prevent the building from being damaged by the applied load.

  Further, the method for repairing an overhead crane according to the present invention includes a crane main body disposed below a ceiling in a building, and a traveling unit that supports the crane main body and can travel on a rail attached to the building. A method for repairing an overhead crane, wherein the traveling unit and the crane body are coupled between the traveling unit and the crane body so as to be capable of relative movement in a lateral direction perpendicular to the extending direction of the rail. A step of installing a slide mechanism, a step of restricting relative movement between the traveling unit and the crane main body by the slide mechanism, a step of installing a trigger mechanism that is allowed in the event of an earthquake, and a laterally opposed to the crane main body And a step of installing a restoring / damping mechanism having an elastic element that exerts a restoring force in the lateral direction and a damping element that exerts a damping force in the lateral direction between the wall surface in the building. And wherein the door.

  According to such a method, since the restoration / damping mechanism is installed in the crane body between the walls facing the building in the lateral direction, the presence of the restoration / damping mechanism affects the overall height of the overhead crane. Not give. Therefore, the restoring / damping mechanism can be easily incorporated into an overhead crane installed with a limited clearance from the ceiling. In addition, compared to the case where a restoration / damping mechanism is incorporated between the traveling unit and the crane body, it is not necessary to jack up the crane body from the traveling unit for a long time, so restoration can be done in a simple and short work. • A damping mechanism can be incorporated.

  According to the overhead crane and the method for repairing an overhead crane according to the present invention, it is possible to reduce the load acting on the crane main body when an earthquake occurs without being limited by the clearance with the ceiling surface.

It is a schematic front view which shows the whole structure of the overhead crane which concerns on 1st embodiment of this invention. It is the figure which expanded the longitudinal direction one end part of the overhead crane which concerns on 1st embodiment of this invention, Comprising: It is a figure which shows states, such as the time of cargo handling. It is the figure which expanded the longitudinal direction one end part of the overhead crane which concerns on 1st embodiment of this invention, Comprising: It is a figure which shows the state at the time of the occurrence of an earthquake. It is the figure which expanded the longitudinal direction one end part of the overhead crane which concerns on 2nd embodiment of this invention, Comprising: It is a figure which shows states, such as the time of cargo handling. It is the figure which expanded the longitudinal direction one end part of the overhead crane which concerns on 2nd embodiment of this invention, Comprising: It is a figure which shows the state at the time of the occurrence of an earthquake. It is the figure which expanded the longitudinal direction one end part of the overhead crane which concerns on 3rd embodiment of this invention, Comprising: It is a figure which shows states, such as the time of cargo handling. It is the figure which expanded the longitudinal direction one end part of the overhead crane which concerns on 3rd embodiment of this invention, Comprising: It is a figure which shows the state at the time of the occurrence of an earthquake. It is the figure which expanded the longitudinal direction one end part of the overhead crane which concerns on 4th embodiment of this invention. It is the figure which expanded the longitudinal direction one end part of the overhead crane which concerns on 5th embodiment of this invention.

[First embodiment]
Embodiments of the present invention will be described below with reference to the drawings. First, the configuration of the overhead crane according to the first embodiment of the present invention will be described. FIG. 1 is a schematic front view showing an overall configuration of an overhead crane 10 according to the first embodiment. 2 and 3 are enlarged views of one end in the longitudinal direction of the overhead crane 10 according to the first embodiment, and FIG. 2 is during loading and running (hereinafter abbreviated as “loading and the like”). FIG. 3 shows the state when an earthquake occurs.

  As shown in FIG. 1, the overhead crane 10 includes a crane main body 11 extending in the horizontal direction in the vicinity of the ceiling in the building B, a pair of traveling units 12 provided at both longitudinal ends of the crane main body 11, and Similarly, a pair of seismic isolation means 23 provided at both longitudinal ends of the crane body 11 are provided.

  As shown in FIG. 1, the building B includes a ceiling surface T, a pair of first vertical wall surfaces V1 extending vertically downward from both ends of the ceiling surface T and facing each other, and a horizontal building from the lower ends of these first vertical wall surfaces V1. B includes a pair of left and right horizontal wall surfaces L extending inward and a pair of second vertical wall surfaces V2 extending vertically downward from the inner end portions of the horizontal wall surfaces L and facing each other. Thereby, in the upper space in the building B, a crane installation space KS is formed surrounded by the ceiling surface T, the first vertical wall surface V1, and the horizontal wall surface L. A rail R is laid on each of the pair of horizontal wall surfaces L so as to extend in a direction perpendicular to the paper surface of FIG. 1 in parallel with the first vertical wall surface V1 and the second vertical wall surface V2.

(Crane body)
The crane body 11 is a structure called a crane girder or girder that supports a trolley (not shown). As shown in FIG. 1, the crane main body 11 has a girder main body 111 formed at a constant girder height, and a pair of overhanging portions 112 that protrude from the both ends of the girder main body 111 to the side. doing. And in the both ends of the girder main body 111, the lower surface 11A of the crane main body 11 is inclined and formed as the girder height gradually decreases toward the overhanging portion 112. The crane main body 11 configured as described above is disposed so as to extend in the horizontal direction from the ceiling surface T of the building B through a slight clearance C1 and inside the crane installation space KS.

(Running part)
The traveling unit 12 plays a role of supporting the crane body 11 so as to travel. As illustrated in FIG. 2, the traveling unit 12 includes a wheel 121 and a support member 122 that rotatably supports the wheel 121. Further, drop-off prevention pieces 123 having a larger diameter than the wheel 121 are provided at both ends in the axial direction of the wheel 121, and project from the outer peripheral side of the wheel 121.

  As shown in FIG. 2, the traveling unit 12 configured as described above has a support member 122 disposed on the lower surface of the overhanging portion 112 formed at the longitudinal end of the crane body 11 via the slide mechanism 13. It is attached. And as for the traveling part 12 integrated with the crane main body 11, the wheel 121 is arrange | positioned on the rail R laid in the horizontal wall surface L of the building B. FIG. Accordingly, the traveling unit 12 can travel in the extending direction of the rail R, that is, in the direction orthogonal to the paper surface in FIG. Further, the drop-off prevention pieces 123 are located on both the left and right sides of the rail R, so that the wheels 121 are prevented from dropping from the rail R.

  The traveling unit 12 is not limited to the wheel 121 of the present embodiment, and may be any one that supports the crane body 11 so that it can travel, for example, an endless track, a slider that slides on the rail R, or the like.

(Seismic isolation means)
The seismic isolation means 23 serves to reduce the effect of vibration on the crane body 11 when an earthquake occurs. As shown in FIG. 1, the seismic isolation means 23 is provided between a pair of slide mechanisms 13 interposed between the traveling units 12 and the crane body 11, and between the traveling units 12 and the crane body 11. A pair of trigger mechanisms 14 and a pair of restoring / damping mechanisms 15 provided at both ends of the crane body 11 are provided.

(Slide mechanism)
The slide mechanism 13 plays a role of slidably connecting the traveling unit 12 and the crane body 11. The slide mechanism 13 is a flat plate member made of a so-called low friction sliding material, and is fixed to the upper surface of a support member 122 constituting the traveling unit 12 as shown in FIG. The longitudinal end of the lower surface 11 </ b> A of the crane body 11 is placed on the slide mechanism 13, so that the crane body 11 is allowed to slide along the slide mechanism 13. In addition, in order for the slide mechanism 13 to slide more smoothly with respect to the crane body 11, it is desirable to fix a flat plate made of stainless steel or the like at a position that contacts the slide mechanism 13 on the lower surface 11 </ b> A of the crane body 11. Furthermore, by being guided by a guide rail (not shown) or the like, the crane body 11 is allowed to move only in the lateral direction substantially perpendicular to the extending direction of the rail R.

  In addition, as a low friction sliding material, the Daiba Metal Industry Co., Ltd. product metal (trade name) can be used, for example. The slide mechanism 13 only needs to be able to smoothly slide between the traveling unit 12 and the crane body 11, and may be a rolling element or the like instead of the low friction sliding material as in this embodiment. . In the present embodiment, the slide mechanism 13 is fixed to the upper surface of the support member 122 of the traveling unit 12, but the slide mechanism 13 may be fixed to the lower surface 11 </ b> A of the crane body 11 instead. Furthermore, the slide mechanism 13 is configured by fixing one of the pair of low friction sliding materials sliding on each other to the upper surface of the support member 122 of the traveling unit 12 and fixing the other to the lower surface 11A of the crane body 11. Also good.

(Trigger mechanism)
The trigger mechanism 14 plays a role of restricting or allowing relative movement between the traveling unit 12 and the crane body 11. As shown in FIG. 2, the trigger mechanism 14 is a rod-shaped member made of metal or the like, and one end thereof is fixed to the side surface 11 </ b> B of the crane body 11 using a fixing bracket 16, and the others. The end portion is fixed to the support member 122 using the fixing bracket 17. As a result, the trigger mechanism 14 restrains the relative movement between the traveling unit 12 and the crane body 11. The trigger mechanism 14 does not break due to a load acting in the lateral direction when the overhead crane 10 is loaded, etc., but has a strength enough to break due to an excessive load acting in the lateral direction when an earthquake occurs. Yes. And the trigger mechanism 14 accept | permits the relative movement of the traveling part 12 and the crane main body 11 by fracture | rupturing.

  In this embodiment, the so-called passive trigger mechanism 14 that breaks the metal rod with a load acting at the time of the occurrence of the earthquake is used. However, instead of this, electric control is performed to detect the vibration of the earthquake. A so-called active trigger mechanism 14 that allows horizontal displacement may be used.

(Restoration / attenuation mechanism)
The restoring / damping mechanism 15 plays a role of attenuating vibration generated in the crane body 11. As shown in FIG. 2, the restoring / damping mechanism 15 includes a bracket portion 18 attached to the lower surface 11A of the crane body 11, a coil spring 19 (elastic element) having one end portion attached to the bracket portion 18, and An oil damper 20 (attenuating element) and a pressing plate 21 to which the other ends of the coil spring 19 and the oil damper 20 are attached are provided.

  The bracket portion 18 serves to securely fix the restoring / damping mechanism 15 to the crane body 11 regardless of the reaction force received from the second vertical wall surface V2. As shown in FIG. 2, the bracket portion 18 includes a first fixing plate 181 and a second fixing plate 182 fixed to the lower surface 11 </ b> A of the crane body 11, and a pair of hanging plates that hang downward from the second fixing plate 182. 183, a connecting plate 184 that connects the lower ends of the drooping plates 183 to each other, a mounting plate 185 that droops further downward from the connecting plate 184, and a reinforcing plate 186 that structurally reinforces the connection of these plates. doing.

  Here, as shown in FIG. 2, the first fixing plate 181 is fixed to a horizontal portion of the girder body 111 on the lower surface 11 </ b> A. The second fixing plate 182 is fixed to the inclined surface of the girder body 111 on the lower surface 11A. A coil spring 19 and an oil damper 20 are attached to the attachment plate 185, respectively.

  As shown in FIG. 2, the oil damper 20 includes a cylinder casing 201 and a piston rod 202 provided inside the cylinder casing 201 so as to be able to appear and retract. The cylinder casing 201 is fixed to the mounting plate 185 of the bracket portion 18. Further, the piston rod 202 is fixed to the pressing plate 21 at the base end. A slight gap C2 is provided between the pressing plate 21 and the second vertical wall surface V2 of the building B.

(Function and effect)
Next, the effect of the overhead crane 10 which concerns on 1st embodiment of this invention is demonstrated. First, when the overhead crane 10 is being handled, a load in the lateral direction may slightly act on the trigger mechanism 14 as the traveling unit 12 travels along the rail R. However, as described above, since the trigger mechanism 14 has sufficient strength to withstand the load acting during cargo handling, the trigger mechanism 14 does not break. Therefore, as shown in FIG. 2, the relative movement between the crane body 11 and the traveling unit 12 is constrained by the trigger mechanism 14. Thereby, the relative movement to the horizontal direction of the crane main body 11 and the traveling part 12 does not generate | occur | produce.

  The pressing plate 21 constituting the restoring / damping mechanism 15 is provided so as to leave a slight gap C2 between the second vertical wall surface V2 of the building B. Therefore, since the restoration / attenuation mechanism 15 and the second vertical wall surface V2 do not come into contact with each other during cargo handling, the restoration / attenuation mechanism 15 does not hinder the traveling of the overhead crane 10.

  On the other hand, if an excessive lateral load is applied to the trigger mechanism 14 when an earthquake occurs, the trigger mechanism 14 is broken at a position between the fixing bracket 16 and the fixing bracket 17 as shown in FIG. Then, the restriction by the trigger mechanism 14 is released, and the relative movement between the crane body 11 and the traveling unit 12 is allowed. Here, as described above, the travel unit 12 is restricted from moving in the lateral direction by the pair of drop-off prevention pieces 123 included in the wheels 121. Therefore, as indicated by an arrow in FIG. 3, the crane body 11 moves in the lateral direction. For example, in FIG. 3, the crane body 11 moves in a direction approaching the second vertical wall surface V <b> 2.

  When the crane body 11 approaches the second vertical wall surface V2, as shown in FIG. 3, the restoring / damping mechanism 15 attached to the crane body 11 also approaches the second vertical wall surface V2, thereby causing the restoring / damping mechanism 15 to The constituting pressing plate 21 comes into contact with the second vertical wall surface V2. When the crane body 11 further approaches the second vertical wall surface V2 from there, the coil spring 19 is compressed. Thereby, a restoring force in the lateral direction acts on the crane body 11 from the coil spring 19, and the crane body 11 that has received the restoring force moves in a direction away from the second vertical wall surface V2. Thereafter, when the coil spring 19 is extended, the crane body 11 receiving the restoring force from the coil spring 19 moves in a direction approaching the second vertical wall surface V2. In this way, the crane body 11 vibrates in the lateral direction, and a damping force acts on the crane body 11 by the oil damper 20 during that time. Thereby, it is possible to reduce the load which acted by the earthquake.

  Further, when an earthquake occurs, an excessive load may act on the overhead crane 10 in the traveling direction. However, as described above, the slide mechanism 13 only allows movement in the lateral direction with respect to the crane body 11 and does not allow movement in the traveling direction. Therefore, in this case, the trigger mechanism 14 is not broken, and the crane main body 11 and the traveling unit 12 integrally slide in the traveling direction with respect to the rail R, so that the load applied by the earthquake can be released.

  As described above, according to the overhead crane 10 according to the first embodiment, the restoration / attenuation mechanism 15 that reduces the load acting when an earthquake occurs is provided between the crane body 11 and the second vertical wall surface V2 of the building B. It is done. Accordingly, the height of the overhead crane 10 as a whole can be kept low as compared with the case where the restoration / damping mechanism 15 is incorporated between the crane body 11 and the traveling unit 12. Thereby, without being restricted by the clearance C1 with the ceiling surface T of the building B, the restoration / attenuation mechanism 15 is incorporated into the overhead crane 10 and the seismic isolation effect is exhibited as the seismic isolation means 23 with the slide mechanism 13. be able to.

(Repair procedure for existing overhead crane)
The overhead crane 10 according to the present embodiment is not only newly manufactured, but also by performing a repair work for attaching the restoration / damping mechanism 15 to an existing overhead crane (not shown) installed in the building B. Can also be produced. When renovating an existing overhead crane, an operator first installs a slide mechanism 13 that connects the traveling unit 12 and the crane body 11 shown in FIG. Here, relative movement means movement in the lateral direction orthogonal to the extending direction of the rail R.

  Next, the worker installs the trigger mechanism 14 so as to straddle the crane body 11 and the traveling unit 12. More specifically, the operator fixes one end portion of the trigger mechanism 14 to the side surface 11B of the crane body 11 using the fixing bracket 16 and uses the fixing bracket 17 to connect the other end portion of the trigger mechanism 14 to the traveling portion 12. The support member 122 is fixed.

  Next, the operator attaches the restoring / damping mechanism 15 to the crane body 11. More specifically, the operator arranges the restoration / attenuation mechanism 15 so as to leave a gap C2 between the pressing plate 21 and the second vertical wall surface V2. Then, the first fixing plate 181 constituting the bracket portion 18 of the restoration / attenuation mechanism 15 is on the lower surface 11A of the girder body 111 of the crane body 11 and a horizontal portion, and the second fixing plate 182 is the lower surface 11A of the girder body 111. And it fixes to each inclined part. Thus, the repair work for the existing overhead crane is completed.

  According to such an existing method for repairing an overhead crane, the restoring / damping mechanism 15 is installed on the lower surface 11A of the crane body 11 so as to face the second vertical wall surface V2. The height of the overhead crane 10 as a whole is not affected. Therefore, the restoring / damping mechanism 15 can be easily incorporated into the overhead crane 10 installed in a state where the clearance C1 with the ceiling surface T is limited. Further, as compared with the case where the restoration / attenuation mechanism 15 is incorporated between the traveling unit 12 and the crane body 11, it is not necessary to jack up the crane body 11 from the traveling unit 12 for a long time. Can be achieved.

[Second Embodiment]
Next, the configuration of the overhead crane according to the second embodiment of the present invention will be described. 4 and 5 are enlarged views of one end in the longitudinal direction of the overhead crane 30 according to the second embodiment. FIG. 4 shows a state at the time of cargo handling and FIG. 5 shows a state at the time of occurrence of an earthquake. ing.

  Compared with the overhead crane 10 of the first embodiment shown in FIG. 2, the overhead crane 30 of the second embodiment has a lower surface 11 </ b> A of the crane body 11 in that the restoring / damping mechanism 31 is attached to the side surface 11 </ b> B of the crane body 11. This is different from the first embodiment in which the restoration / attenuation mechanism 15 is attached. Since the other configuration is the same as that of the first embodiment, the same reference numerals as those in FIGS. 2 and 3 are given in FIGS. 4 and 5 and the description thereof is omitted here.

  As shown in FIG. 4, the restoration / attenuation mechanism 31 of the second embodiment is common to the restoration / attenuation mechanism 15 of the first embodiment in that it includes a coil spring 19, an oil damper 20, and a pressing plate 21. ing. However, the first embodiment is different from the first embodiment in that the bracket portion 32 to which the coil spring 19 and the oil damper 20 are attached is configured only by the attachment fixing plate 321. Other configurations and operational effects of the restoration / attenuation mechanism 31 are the same as those of the restoration / attenuation mechanism 15 of the first embodiment.

  As shown in FIG. 4, the restoration / attenuation mechanism 31 configured as described above has its mounting fixing plate 321 fixed to the side surface 11 </ b> B of the overhanging portion 112 formed at the longitudinal end portion of the crane body 11. . And in the state where an external force does not act, some clearance gap C2 is provided between the press board 21 which comprises the decompression | restoration / attenuation | damping mechanism 31, and the 2nd vertical wall surface V2 of the building B. FIG.

  According to the overhead crane 30 of the second embodiment configured as described above, the trigger mechanism 14 does not break as shown in FIG. No relative movement in the lateral direction between the crane body 11 and the traveling unit 12 occurs. Further, since the pressing plate 21 constituting the restoring / damping mechanism 31 is provided with a slight gap C2 from the second vertical wall surface V2 of the building B, the restoring / damping mechanism 31 prevents the overhead crane 30 from traveling. Never become.

  On the other hand, if an excessive load is applied in the lateral direction to the trigger mechanism 14 when an earthquake occurs, the trigger mechanism 14 is broken as shown in FIG. Then, as indicated by an arrow in FIG. 5, the crane body 11 moves in the lateral direction, and the pressing plate 21 constituting the restoring / damping mechanism 31 comes into contact with the second vertical wall surface V <b> 2. Thereafter, as in the first embodiment, the crane body 11 vibrates in the lateral direction, and the vibration of the crane body 11 is gradually attenuated by the oil damper 20 during that time.

  Furthermore, according to the overhead crane 30 of the second embodiment, the bracket portion 32 of the restoration / attenuation mechanism 31 is configured by only the mounting and fixing plate 321, so that the restoration / attenuation is compared with the overhead crane 10 of the first embodiment. There is an advantage that the structure of the mechanism 31 can be simplified.

[Third embodiment]
Next, the configuration of the overhead crane according to the third embodiment of the present invention will be described. 6 and 7 are enlarged views of one end portion in the longitudinal direction of the overhead crane 40 according to the third embodiment. FIG. 6 shows a state during loading and unloading, and FIG. 7 shows a state when an earthquake occurs. ing.

  Compared with the overhead crane 10 of the first embodiment, the overhead crane 40 of the third embodiment has the restoration / damping mechanism 15 attached to the lower surface 11A of the crane body 11 and the restoration / damping mechanism 31 attached to the side surface 11B. . That is, the restoration / attenuation mechanism 15 having the same configuration as that of the first embodiment is attached to the lower surface 11A of the crane body 11, and the restoration / attenuation mechanism 31 having the same configuration as that of the second embodiment is attached to the side surface 11B of the crane body 11. It has been. Since the other configuration is the same as that of the first embodiment, the same reference numerals as those in FIGS. 2 and 3 are attached to FIGS. 6 and 7, and the description thereof is omitted here.

  According to the overhead crane 40 of the third embodiment configured as described above, the trigger mechanism 14 does not break as shown in FIG. No relative movement in the lateral direction between the crane body 11 and the traveling unit 12 occurs. Further, the pressing plates 21 of the restoration / attenuation mechanism 15 and the restoration / attenuation mechanism 31 are provided with a slight gap C2 from the first vertical wall surface V1 and the second vertical wall surface V2 of the building B, respectively. The restoring / damping mechanism 15 and the restoring / damping mechanism 31 do not hinder the traveling of the overhead crane 40.

  On the other hand, if an excessive load is applied in the lateral direction to the trigger mechanism 14 when an earthquake occurs, the trigger mechanism 14 is broken as shown in FIG. Then, as indicated by an arrow in FIG. 7, the crane body 11 moves in the lateral direction, and the pressing plates 21 of the restoration / attenuation mechanism 15 and the restoration / attenuation mechanism 31 respectively correspond to the corresponding first vertical wall surface V1 and second. It contacts the vertical wall surface V2. Thereafter, as in the first embodiment, the crane body 11 vibrates in the lateral direction, and the vibration of the crane body 11 is gradually attenuated by the oil damper 20 during that time.

  Furthermore, according to the overhead crane 40 of the third embodiment, the restoring / damping mechanism 15 is provided on the lower surface 11A of the crane body 11, and the restoring / damping mechanism 31 is provided on the side surface 11B of the crane body 11. Therefore, the load acting on the overhead crane 40 when an earthquake occurs is the first vertical wall surface V1 and the second vertical wall surface of the building B at the two locations of the pressing plate 21 of the restoring / damping mechanism 15 and the pressing plate 21 of the restoring / damping mechanism 15. Each is transmitted to V2. As a result, it is possible to prevent the building B from being damaged by an excessively large load acting on the building B locally.

[Fourth embodiment]
Next, the structure of the overhead crane which concerns on 4th embodiment of this invention is demonstrated. FIG. 8 is an enlarged view of one longitudinal end portion of the overhead crane 50 according to the fourth embodiment.

  The overhead crane 50 of the fourth embodiment differs from the overhead crane 30 of the second embodiment shown in FIG. 4 only in the configuration of the trigger mechanism 51. Since other configurations and operational effects are the same as those in the second embodiment, the same reference numerals as those in FIG. 4 are given in FIG.

  The trigger mechanism 51 of the fourth embodiment is the same as the trigger mechanism 14 of the second embodiment in that it is a rod-shaped member made of metal or the like, but the trigger mechanism of the second embodiment is a so-called hysteretic damper. 14 is different. This hysteretic damper means a damper that absorbs and dissipates seismic energy by hysteretic damping caused by plastic deformation of a steel material or the like. In this embodiment, a steel rod damper is used as the hysteretic damper. Here, as a material for composing the steel rod damper, for example, SS400 or SCM440 can be used. In addition, as a hysteresis type damper, it replaces with the steel rod damper of this embodiment, and what is called a friction damper which absorbs seismic energy with a frictional force may be used.

  According to such a trigger mechanism 51, details are not shown in the figure, but the trigger mechanism 51 is not broken even when a load in the lateral direction is applied to the trigger mechanism 51 when the overhead crane 50 is handled. Therefore, relative movement in the lateral direction between the crane body 11 and the traveling unit 12 does not occur.

  On the other hand, if an excessive lateral load is applied to the trigger mechanism 51 when an earthquake occurs, the trigger mechanism 51 reaches a bending yield or a shear yield, and then the trigger mechanism 51 is plastically deformed. In particular, when the amount of plastic deformation of the trigger mechanism 51 increases to such an extent that it does not break, the pressing plate 21 constituting the restoring / damping mechanism 31 is the first vertical of the building B as shown in FIG. Contact the wall surface V1. Thereby, in addition to the energy absorption by the hysteresis action of the trigger mechanism 51, the vibration of the crane body 11 is attenuated by the action of the restoring / damping mechanism 31, as shown in FIG.

  When the vibration of the crane body 11 is attenuated and the amount of plastic deformation of the trigger mechanism 51 is reduced, the pressing plate 21 of the restoring / damping mechanism 31 is moved to the first vertical wall surface V1 as shown in FIG. Will not touch. Thereby, the vibration of the crane main body 11 is attenuate | damped only by the energy absorption by the hysteresis effect | action of the trigger mechanism 51 after that.

  As described above, according to the overhead crane 50 of the fourth embodiment, the hysteresis action of the trigger mechanism 51 is used in addition to the damping action of the restoring / damping mechanism 31, thereby damping the vibration of the crane body 11 more efficiently. There is an advantage that can be made.

  In the present embodiment, the trigger mechanism 14 is a hysteretic damper in the overhead crane 30 of the second embodiment shown in FIG. 4, but similarly, the overhead crane 10 of the first embodiment shown in FIG. In the overhead crane 40 of the third embodiment shown in FIG. 6, the trigger mechanism 14 can be a hysteretic damper.

[Fifth embodiment]
Next, the structure of the overhead crane which concerns on 5th embodiment of this invention is demonstrated. FIG. 9 is an enlarged view of one longitudinal end portion of the overhead crane 60 according to the fifth embodiment.

  Compared with the overhead crane 40 of the third embodiment shown in FIG. 6, the overhead crane 60 of the fifth embodiment has reinforcing panels 61 (reinforcing members) on the first vertical wall surface V1 and the second vertical wall surface V2 of the building B, respectively. It is different in that it is pasted. Since other configurations and operational effects are the same as those in the third embodiment, the same reference numerals as those in FIG. 6 are given in FIG.

  The reinforcing panel 61 is formed of a material having higher strength than the first vertical wall surface V1 and the second vertical wall surface V2, and for example, a metal plate or the like can be used. As shown in FIG. 9, the reinforcing panel 61 is a surface of the first vertical wall surface V <b> 1 and the second vertical wall surface V <b> 2, a position facing the pressing plate 21 of the restoring / damping mechanism 15, and the restoring / damping mechanism 31. Are attached to positions facing the pressing plate 21. The pressing plates 21 of the restoration / attenuation mechanism 15 and the restoration / attenuation mechanism 31 are provided so as to leave a gap C3 having a predetermined width between the pressing plates 21 and the reinforcing panels 61, respectively.

  According to such a configuration, when an excessive load is applied to the crane body 11 when an earthquake occurs, the trigger mechanism 14 is broken although details are not shown in the figure. And if the crane main body 11 and the traveling part 12 start the relative movement to a horizontal direction, the excessive load which acted on the crane main body 11 will act with respect to the reinforcement panel 61 which opposes from the press board 21, respectively. Thereby, it is possible to prevent the first vertical wall surface V1 and the second vertical wall surface V2 of the building B from being damaged by the contact with the pressing plate 21.

  The reinforcing panel 61 is not limited to a plate-like member as in this embodiment, and the design can be changed to an arbitrary shape. However, if the reinforcing panel 61 is a plate-like member as in this embodiment, in addition to having load resistance due to high strength as a material, the load received from the pressing plate 21 is dispersed in the plane. Therefore, there is an advantage that damage to the building B can be prevented more reliably.

  The various shapes, combinations, operation procedures, and the like of the constituent members shown in the above-described embodiments are merely examples, and various changes can be made based on design requirements and the like without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 Overhead crane 11 Crane main body 111 Girder main body 112 Overhang | projection part 11A Lower surface 11B Side surface 12 Traveling part 121 Wheel 122 Support member 123 Fall-off prevention piece 13 Slide mechanism 14 Trigger mechanism 15 Restoration / attenuation mechanism 16 Fixing bracket 17 Fixing bracket 18 Bracket part 181 1st One fixed plate 182 Second fixed plate 183 Hanging plate 184 Connection plate 185 Mounting plate 186 Reinforcement plate 19 Coil spring 20 Oil damper 201 Cylinder casing 202 Piston rod 21 Press plate 23 Seismic isolation means 30 Overhead crane 31 Restoration / attenuation mechanism 32 Bracket part 321 Mounting fixing plate 40 Overhead crane 50 Overhead crane 51 Trigger mechanism 60 Overhead crane 61 Reinforcement panel C1 Clearance C2 Clearance C3 Clearance B Building KS Crane installation space L Horizontal wall surface R Rail T Ceiling surface V1 First drop Straight wall V2 Second vertical wall

Claims (7)

A crane body arranged below the ceiling in the building,
A traveling unit that supports the crane body and is capable of traveling on a rail attached to the building;
A slide mechanism that is provided between the traveling unit and the crane body, and connects the traveling unit and the crane body so as to enable relative movement in a lateral direction perpendicular to the extending direction of the rail;
A trigger mechanism that constrains relative movement between the traveling unit and the crane body by the slide mechanism, and that is allowed during an earthquake,
Restoring the crane body with an elastic element that acts as a restoring force in the lateral direction and a damping element that acts as a damping force in the lateral direction, attached to the crane body with a gap between the walls facing the building in the lateral direction・ Dampening mechanism,
An overhead crane comprising:   The overhead crane according to claim 1, wherein the restoring / damping mechanism is attached to a lower surface of the crane body.   The overhead crane according to claim 1, wherein the restoring / damping mechanism is attached to a side surface of the crane main body.   The overhead crane according to any one of claims 1 to 3, wherein the slide mechanism is a low friction sliding material interposed between the crane body and the traveling unit.   The overhead crane according to any one of claims 1 to 4, wherein the trigger mechanism is a hysteresis type damper that attenuates relative movement between the traveling unit and the crane main body by hysteresis attenuation.   The overhead crane according to any one of claims 1 to 5, wherein a reinforcing member that reinforces the wall surface is provided at a position on the wall surface in the building facing the restoration / attenuation mechanism. A method for repairing an overhead crane, comprising: a crane main body arranged below a ceiling in a building; and a traveling unit that supports the crane main body and can travel on a rail attached to a building,
A step of installing a slide mechanism that connects the traveling unit and the crane body between the traveling unit and the crane body so as to enable relative movement in a lateral direction orthogonal to the extending direction of the rail;
The step of restraining relative movement between the traveling unit and the crane body by the slide mechanism and installing a trigger mechanism that is allowed in an earthquake, and
A step of installing a restoring / damping mechanism having an elastic element that exerts a restoring force in the lateral direction and a damping element that exerts a damping force in the lateral direction between the crane main body and the wall surface in the building facing in the lateral direction. When,
A method for repairing an overhead crane characterized by comprising:

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