JP2013163551A - Crane apparatus and method of repairing crane apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a function of a base isolation unit to be exerted enough while suppressing a height dimension of a crane apparatus at a low level, even if the traveling-type crane apparatus is provided with the base isolation unit.SOLUTION: A crane apparatus is provided that includes: a crane body 5 having a hanging means for hanging a load; a travel part 6 having rotatable wheels 22 configured to rotate and move on a travel rail 4 and mounted to the crane body 5 so as to be relatively movable in the rotation axis direction of the wheels 22; a swinging arm 31 supported at a side end of the crane body 5 in the extending direction of the travel rail 4 so as to be swingable about an axis parallel to the extending direction; and a restoring mechanism 32 provided between the crane body 5 and one swinging end of the swinging arm 31 and applying restoring force to the swinging arm 31. The other swinging end of the swinging arm 31 is connected to the travel part 6 or so that the relative movement between the crane body 5 and the travel part 6 is converted into the swinging of the swinging arm 31.

Description

  The present invention relates to a crane device and a method for repairing a crane device.

  Crane devices used for lifting loads (lifting or hanging) are installed outdoors (for example, in harbor quay or container yard) or indoors (for example, in a building such as a factory). A traveling crane apparatus that lifts and conveys a load while traveling is widely used. This traveling crane apparatus includes a crane main body that suspends a load, and a traveling unit that supports the crane main body and travels on a traveling rail.

  Such a traveling crane device requires a structure that prevents the traveling unit from derailing from the traveling rail or the crane body from being damaged due to excessive swinging of the crane body when an earthquake occurs. Therefore, in the past, an excessive load was applied by reducing the excessive load that acts on the traveling unit during an earthquake by providing a seismic isolation unit between the traveling unit and the crane body. Has been proposed (see, for example, Patent Documents 1 and 2). Here, the seismic isolation unit includes a slide mechanism that allows the crane body to move in the horizontal direction relative to the traveling unit, a restoring force mechanism that applies a restoring force to the crane body that has moved relative to the traveling unit, and a crane. A damping mechanism for damping the vibration of the main body is provided.

Moreover, the indoor traveling crane apparatus (overhead crane) is provided so as to be bridged on a pair of traveling rails fixed to the left and right ends of the building in the vicinity of the ceiling of the building (see, for example, Patent Document 3). Such an overhead crane is configured such that wheels capable of rolling on each traveling rail are provided as the traveling units at both ends of the crane body spanned between the left and right ends of the building. By placing on a pair of traveling rails, traveling in the extending direction of the traveling rails is possible.
And the overhead crane of patent document 3 thinks that each wheel (traveling part) is pinched | interposed with the auxiliary rail fixed to the ceiling vicinity of a building with a traveling rail so that it may not take off from a traveling rail at the time of the occurrence of an earthquake. It has been.

Japanese Patent No. 3993570 Japanese Patent Laid-Open No. 2000-203786 JP 2007-269428 A

However, when the traveling crane device is an overhead crane provided near the ceiling in the building, the height dimension from the traveling rail to the ceiling of the building is limited, so the crane body is jacked up, etc. It is difficult to install the seismic isolation unit described in Patent Literatures 1 and 2 between the main body and the traveling unit, that is, to repair the crane device.
Even if the conventional seismic isolation unit can be installed on an overhead crane, the space on the running rail is limited by the inner surface of the building (ceiling and side walls). It may be difficult to ensure a sufficient amount (for example, a length by which a spring or a damper expands and contracts), that is, there is a possibility that the function of the seismic isolation unit cannot be exhibited sufficiently.

  In addition, like patent document 3, in order to fix an auxiliary | assistant rail to a building, repair of a building itself is needed, Therefore A repair becomes big and troublesome. In addition, there is a problem that the construction cost for renovation becomes high.

  The present invention has been made in view of the circumstances described above, and even if a seismic isolation unit is provided, the crane apparatus capable of sufficiently exhibiting the functions of the seismic isolation unit while suppressing the height dimension low, and It aims at providing the repair method of a crane apparatus.

  In order to solve this problem, a crane apparatus according to the present invention is a crane apparatus that can travel on a traveling rail and that suspends a load. A traveling unit having a wheel that is rotatable so as to roll on a rail, and is attached to the crane main body so as to be relatively movable in a rotation axis direction of the wheel; the crane main body and the traveling unit; One of the swing rails is supported at a side end in the extending direction of the traveling rail so as to be swingable about an axis parallel to the extending direction, and one of the crane body and the traveling unit and the swinging arm. A restoring mechanism that is provided between one swinging end of the moving arm and applies a restoring force to the swinging arm, and the relative movement between the crane body and the traveling unit is swung. For arm swing As conversion, characterized in that the other swinging end of the swing arm is connected to the other of said crane body and the traveling portion.

  When an earthquake occurs with the crane device having the above configuration arranged on the traveling rail, the traveling unit moves relative to the crane body together with the traveling rail in the direction of the axis of rotation of the wheel, and swings along with the relative movement. The moving arm swings. And, since the restoring force of the restoring mechanism acts on the swing of this swing arm, it prevents an excessive load from acting on the crane body due to excessive relative movement (swing) of the crane body with respect to the traveling part, It is possible to prevent the crane apparatus from derailing from the traveling rail and the crane body from being damaged. That is, in the crane apparatus having the above-described configuration, a seismic isolation unit that reduces an excessive load acting on the crane body during an earthquake is configured by the swing arm and the restoring mechanism.

  And according to the above-mentioned crane device, since the swing arm is arranged at the side end of the crane body and the traveling unit, the restoring mechanism can be provided at the side end as well as the swing arm. Even if the swing arm and the restoring mechanism are provided in the crane main body or the traveling unit, the height of the crane device disposed on the traveling rail can be kept low. Therefore, the crane apparatus can be easily applied to an overhead crane with a limited space (particularly height dimension) on the traveling rail. In other words, the swing arm and the restoring mechanism can be easily installed on an overhead crane that does not include a seismic isolation unit, and the construction cost for installing these can be kept low.

  In addition, since the restoring mechanism is arranged at the side end of the crane body or the traveling unit, the stroke amount (for example, the length by which the elastic member expands and contracts) in the restoring mechanism is not easily limited by the space on the traveling rail. It is also possible to ensure a sufficient stroke amount. That is, the swing arm and the restoring mechanism can sufficiently exhibit the function as the seismic isolation unit.

In the crane apparatus, the distance from the swing axis of the swing arm to the one swing end is set to be longer than the distance from the swing axis of the swing arm to the other swing end. It is preferable that
According to the crane apparatus, it is possible to ensure a long stroke amount in the restoring mechanism with respect to a length in which the crane body and the traveling unit move relative to each other. In other words, even if the length of the relative movement between the crane body and the traveling unit is short, a large restoring force can be applied to the crane body that moves relative to the traveling unit. That is, the function of the seismic isolation unit can be further improved.

In the crane apparatus, the restoring mechanism may include an elastic member that can elastically expand and contract, and an expansion and contraction direction of the elastic member may be inclined with respect to a vertical direction.
That is, in the above crane device, the expansion / contraction direction of the elastic member (the stroke direction in the restoration mechanism) is inclined with respect to the vertical direction. It can suppress that a dimension becomes high.

Furthermore, in the crane apparatus, the restoring mechanism includes an elastic member that can elastically expand and contract, and the restoring force that acts on the swing arm is one of compression deformation and expansion deformation of the elastic member. It is preferable that the elastic member is given an elastic force by the one elastic deformation in an initial state where no external force is applied to the traveling portion.
The elastic force indicates a force that elastically deforms the elastic member in the elastic deformation direction of one of compression deformation and expansion deformation.

According to the crane apparatus, in an initial state where no external force is applied to the crane body and the traveling unit, one elastic deformation (for example, compressive deformation) is applied to the elastic member, that is, the initial elastic force is applied to the elastic member. (For example, initial compression force) is generated.
For this reason, when the external force (for example, the force caused by an earthquake) that attempts to move the traveling unit relative to the crane body is equal to or less than the initial elastic force, the relative position between the crane body and the traveling unit is determined by the initial elastic force of the elastic member. They are held at the same position (initial position) as in the initial state, and they do not move relative to each other. On the other hand, when the external force for moving the traveling unit relative to the crane body is larger than the initial elastic force, one elastic deformation applied to the elastic member further proceeds, and the crane body and the traveling unit are It will move relative.
Therefore, the relative movement of the crane body and the traveling unit can be prevented when the external force acting on the traveling unit is small, such as during cargo handling, traveling, or when a small earthquake occurs. Moreover, when the external force which acts on a traveling part is large like the time of a big earthquake occurrence, it becomes possible to move a crane main body and a traveling part relatively, and to reduce the load which acts on a crane main body.

  In the crane apparatus, a damping mechanism is provided between one of the crane body and the traveling unit and one swinging end of the swinging arm and applies a damping force to the swinging arm. May be provided.

In the said crane apparatus, the excessive relative movement of the crane main body with respect to a traveling part can be attenuated effectively. That is, this damping mechanism constitutes a seismic isolation unit together with the swing arm and the restoring mechanism described above.
And according to the said crane apparatus, even if it provides a damping mechanism similarly to the case of the rocking | fluctuating arm and restoring mechanism mentioned above, the height dimension of the crane apparatus distribute | arranged on a running rail can be restrained low. In addition, since the damping mechanism is provided at the side end of the crane main body and the traveling unit in the same manner as the restoring mechanism, the stroke amount (for example, the length at which the damper expands and contracts) in the damping mechanism is reduced. This makes it difficult to be restricted by the size), so that the stroke amount can be sufficiently secured.

  Furthermore, in the crane apparatus, the swing arm is attached to the crane body, and the other swing end of the swing arm is configured by a pair of guide rollers that sandwich the travel rail from the width direction. Preferably it is.

In the above crane device, in the state where the crane device is arranged on the traveling rail, the other swinging end of the swinging arm composed of the pair of guide rollers is connected to the traveling unit via the traveling rail. Therefore, when the traveling unit moves relative to the crane body in the direction of the rotation axis of the wheel together with the traveling rail at the time of an earthquake, the swing arm swings while maintaining the state where the pair of guide rollers sandwich the traveling rail. Will move.
And according to the said crane apparatus, since it is not necessary to connect the other rocking | fluctuation end of a rocking | fluctuation arm directly to a driving | running | working part, attachment of the rocking | swiveling arm with respect to the crane apparatus which does not have a seismic isolation unit can be performed easily. it can.

Further, in the crane device, the swing arm is attached to the crane body, the other swing end of the swing arm is connected to a bracket disposed on the traveling rail, and the bracket is It may be fixed to the traveling part by a connecting member.
In the crane apparatus, the other swing end of the swing arm is connected to the traveling unit via the bracket and the connecting member.

  Furthermore, in the crane apparatus including the bracket, it is preferable that the bracket is provided with a pair of guide rollers that sandwich the traveling rail from the width direction.

In the crane apparatus, the other swing end of the swing arm is connected to the traveling portion via the bracket and the connecting member, and is also connected to the traveling portion via the pair of guide rollers and the traveling rail. become.
When the other swinging end of the swing arm is connected to the traveling part via the bracket and the connecting member, the bracket by the connecting member is moved by relative movement of the traveling part or swinging of the swinging arm when an earthquake occurs. Stress may occur at the connecting portion with the traveling portion. Thus, when the other swing end of the swing arm is connected to the traveling unit via the pair of guide rollers and the traveling rail as in the crane device, the stress described above is generated between the bracket by the connecting member and the traveling unit. It is distributed in two places, the connecting portion and the connecting portion between the pair of guide rollers and the traveling rail. That is, it is possible to reduce the stress generated at the connecting portion between the bracket and the traveling portion by the connecting member.

Further, in the crane device, a projection is formed on one of the other swing end and the bracket, and a long hole for inserting the projection on the other swing end and the other of the bracket is formed. When the projection is inserted into the slot, the projection can slide in the longitudinal direction of the slot so as to convert the movement of the bracket in the direction of the rotation axis into the swing of the swing arm. It is good to be.
In the crane apparatus, it is possible to reliably prevent stress from being applied to the connecting portion between the bracket and the traveling portion by the connecting member due to the relative movement of the traveling portion and the swing of the swinging arm when an earthquake occurs.

  Furthermore, in the crane apparatus, the restoring mechanism moves linearly with respect to the accommodation case so as to elastically expand and contract, an accommodation case that accommodates the elastic member, and the elastic member to expand and contract. And the rod is connected to the one swinging end of the swinging arm, and the housing case is parallel to the extending direction with respect to one of the crane body and the traveling unit. It is good that it is attached so that it can rotate around a certain axis.

  In the crane apparatus, the rod linearly moves with the swing of the swing arm, whereby the elastic member expands and contracts. Since the storage case is rotatably attached to one of the crane body and the traveling unit, the linear movement direction of the rod can be changed when the swinging arm swings. It can prevent that a stress arises in a storage case.

  Further, in the crane device, the restoring mechanism moves linearly with respect to the housing case so as to elastically expand and contract the elastic member, a housing case that houses the elastic member, and the elastic member. A projection formed on one of the rod and the one oscillating end of the oscillating arm, and inserting the projection on the other oscillating end and the other of the bracket. In the state where the long hole is formed and the protrusion is inserted into the long hole, the protrusion is arranged in the longitudinal direction of the long hole so as to convert the movement of the rod in the telescopic direction into the swing of the swing arm. It may be slidable in the direction.

  Even in the above-described crane device, the rod moves linearly with the swing of the swing arm, whereby the elastic member expands and contracts. For example, the housing case of the restoring mechanism is fixed to one of the crane body and the traveling unit, Even if the moving direction is fixed, when the swing arm swings, the protrusion slides in the longitudinal direction of the long hole, so that the swing of the swing arm is converted into the linear movement direction of the rod. It will be. Therefore, it is possible to reliably prevent stress from being generated on the rod and the housing case of the restoring mechanism.

  The crane device repair method according to the present invention includes a crane main body having a suspension means for suspending a load. The crane body has wheels that are rotatable so as to roll on the traveling rail. A method of repairing a crane device provided on a traveling unit that is capable of traveling in the vehicle, the step of attaching the traveling unit to the crane body so as to be relatively movable in the rotation axis direction of the wheel, and the crane body And a step of attaching a swing arm so as to be swingable about an axis parallel to the extending direction to a side end portion of the traveling rail in one of the traveling portions, and the crane body and the traveling portion. A step of providing a restoring mechanism for applying a restoring force to the swinging arm between one of the swinging arms and one swinging end of the swinging arm, and the relative movement between the crane body and the traveling unit Said shaking As converted into the swing of the arm, characterized in that it comprises the the steps of connecting the other swinging end of the swing arm to the other of said crane body and the traveling portion.

  The crane apparatus subjected to the repair method is the same as the above-described crane apparatus and has the same effects. In particular, in the repair method described above, the swing arm and the restoring mechanism are arranged at the side ends of the crane body and the traveling unit, so that it is not necessary to jack up the crane body higher than the traveling unit as in the prior art. Therefore, even if the crane device before the repair method is an overhead crane with limited space on the traveling rail, the swing arm and the restoring mechanism can be easily installed on the overhead crane. It becomes.

  According to the present invention, even if the seismic isolation unit is provided in the crane device, the function of the seismic isolation unit can be sufficiently exhibited while the height dimension is kept low.

It is a schematic front view which shows the overhead crane which concerns on 1st embodiment of this invention. It is an enlarged front view which shows the principal part of the overhead crane of FIG. 2 shows an initial state where no external force is applied to the traveling portion of FIG. 2, (a) is a cross-sectional view taken along the line A-A in FIG. 2 showing a seismic isolation unit provided in the overhead crane, and (b) is a crane main body. It is a side view which shows a relative position with a driving | running | working part. 2 shows a state in which an external force applied to one of the wheels in the rotation axis direction is applied to the traveling portion of FIG. 2, and (a) is a cross-sectional view taken along the line AA in FIG. b) is a side view showing a relative position between the crane body and the traveling unit. 2 shows a state in which an external force acting on the other side of the wheel rotation axis acts on the traveling portion of FIG. 2, and (a) is a cross-sectional view taken along the line AA of FIG. b) is a side view showing a relative position between the crane body and the traveling unit. It is a sectional side view which shows the modification of the seismic isolation unit which concerns on 1st embodiment. It is an expanded sectional view showing an important section of an overhead crane concerning a second embodiment of the present invention. It is CC sectional view taken on the line of FIG. It is an expanded sectional view showing an important section of an overhead crane concerning a third embodiment of the present invention.

[First embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. In addition, the crane apparatus which concerns on this embodiment is applied to the indoor overhead crane 1 distribute | arranged to ceiling 3 vicinity in the building 2, as shown in FIG.
That is, a pair of running rails 4 extending horizontally in the front-rear direction (Y-axis direction) are provided on the left and right sides (both sides in the X-axis direction) of the building 2 near the ceiling 3. And the overhead crane (crane apparatus) 1 which concerns on this embodiment is made to be able to drive | work on this pair of traveling rail 4, and is comprised so that a load may be suspended. 1 to 5, the Z-axis direction indicates the vertical direction.
As shown in FIGS. 1 and 2, the overhead crane 1 includes a crane body 5 having a suspension means 7 for hanging a load, and a traveling unit 6 (truck 6) attached to the crane body 5.

The crane body 5 includes a trolley 11 and a crane girder 12.
The trolley 11 has wheels 13 that roll in the extending direction (X-axis direction) on a transverse rail 14 of the crane girder 12 described later, and can thereby move on the transverse rail 14 in the X-axis direction. It has become. The suspending means 7 described above is provided on the trolley 11 and is constructed by suspending a hanging load hook 15 with a wire 16 that can be wound up.

The crane girder 12 includes a girder body 17 that extends in the X-axis direction and spans the left and right sides of the building 2, a traverse rail 14 that is provided on the girder body 17 and extends in the X-axis direction, and a girder body 17 and a yoke 18 provided on both left and right side portions for connection to the traveling portion 6.
Each yoke 18 is arranged on both left and right sides of the girder body 17 so as to support the girder body 17 from below, and is connected to the girder body 17 by yoke pins 19 extending in the X-axis direction.

As shown in FIGS. 1 to 3, a plurality (two in the illustrated example) of traveling parts 6 are arranged in the Y-axis direction below the same yoke 18. Each traveling unit 6 is rotatable so as to roll on the traveling rail 4 on the lower side of the main body 21 and the main body 21 attached to the lower side of the yoke 18 by a track pin 23 extending in the X-axis direction. Wheels 22 are provided.
As shown in FIGS. 3B to 5B, the main body 21 is connected to the yoke 18 by a track pin 23 so as to be relatively movable in the rotation axis direction (X-axis direction) of the wheel 22. . A pair of support portions 20 that support both ends of the track pin 23 in the axial direction are formed at the lower end of the yoke 18, and the main body portion 21 is disposed between the pair of support portions 20 so that the track It is attached to the yoke 18 via a pin 23. Therefore, the range in which the main body portion 21 can move relative to the yoke 18 is set by the distance between the pair of support portions 20.
By being configured as described above, the crane girder 12 is movable in the Y-axis direction in a state where the crane girder 12 is bridged on the pair of traveling rails 4 by the traveling unit 6.

In the overhead crane 1 of the present embodiment, as shown in FIGS. 2 to 5, the housing 24, the swing arm 31, and the side end 18 a of the yoke 18 (the end of the yoke 18 in the Y-axis direction) A restoration mechanism 32 is attached.
The housing 24 is integrally fixed to the side end 18 a of the yoke 18, and is formed to extend below the lower end of the yoke 18. The housing 24 serves to cover a part of the swing arm 31 and the restoration mechanism 32 so that the later-described swing arm 31 and the restoration mechanism 32 are not exposed to the outside as much as possible, and the configuration of the swing arm 31 and the restoration mechanism 32. It serves as an interposer for attaching the element to the yoke 18.

The swing arm 31 is attached to the housing 24 by an arm pin 33 (swing shaft 33) extending in the Y-axis direction. That is, the swing arm 31 is supported so as to be swingable about the axis of the arm pin 33 (around the axis parallel to the extending direction of the traveling rail 4 and around the Y axis) with respect to the yoke 18 and the housing 24. . The arm pin 33 is positioned below the lower end of the yoke 18 (see FIG. 2).
Of the swing arm 31, the tip end (one swing end) of the first arm portion 34 extending upward from the arm pin 33 is connected to a rod 39 of a restoring mechanism 32 described later.

  On the other hand, the tip of the second arm portion 35 extending downward from the arm pin 33 of the swing arm 31 (the other swing end) is a pair of guides that sandwich the travel rail 4 from the width direction (X-axis direction). A roller 36 is used. The pair of guide rollers 36 are configured to rotate around the Z axis and roll on the side surface of the traveling rail 4 when the trolley 11 travels on the traveling rail 4. Thereby, in a state where the overhead crane 1 is arranged on the traveling rail 4, the tip of the second arm portion 35 including the pair of guide rollers 36 is connected to the traveling portion 6 via the traveling rail 4.

And in the state connected in this way, as shown in FIG.4 (b), 5 (b), the traveling part 6 moves with respect to the crane main body 5 with the traveling rail 4 in the X-axis direction by the time of an earthquake etc. At this time, as shown in FIGS. 4A and 5A, the swing arm 31 swings while the pair of guide rollers 36 keeps the state where the traveling rail 4 is sandwiched. At this time, the rotation shafts of the pair of guide rollers 36 are inclined with respect to the Z-axis direction as the swing arm 31 swings.
In the swing arm 31 configured as described above, the distance L1 from the arm pin 33 to the connecting portion between the first arm portion 34 and the rod 39 of the restoring mechanism 32 (the length dimension L1 of the first arm portion 34). However, it is set longer than the distance L2 (the length dimension L2 of the second arm portion 35) from the arm pin 33 to the connecting portion between the pair of guide rollers 36 and the traveling rail 4.

As shown in FIGS. 3A to 5A, the restoring mechanism 32 is provided between the yoke 18 and the tip of the first arm portion 34 and applies a restoring force to the swing arm 31. Is.
More specifically, the restoring mechanism 32 includes a coil spring (elastic member) 37 that can be elastically expanded and contracted, a storage case 38 that stores the coil spring 37, and a storage case 38 that expands and contracts the coil spring 37. And a rod 39 that moves linearly with respect to each other.
The housing case 38 is formed in a hollow cylindrical shape. In addition, through holes penetrating in the direction of the axis O are formed at both ends of the housing case 38 in the direction of the axis O, and a rod 39 is inserted through these through holes. The housing case 38 is fixed to the housing 24 so that the axis O direction extends in the X-axis direction, that is, the axis O direction is inclined by 90 degrees with respect to the vertical direction (Z-axis direction).
The coil spring 37 is housed in the housing case 38 so that the axis O directions of the housing case 38 and the coil spring 37 coincide with each other, and can be elastically expanded and contracted in the axis O direction in the housing case 38.

Further, a pair of pressing members 40 that are formed in a plate shape and sandwich the coil spring 37 from both ends in the direction of the axis O are housed in the housing case 38. Each holding member 40 is movable in the direction of the axis O in the housing case 38. However, as shown in FIG. 3A, each pressing member 40 has an end portion in the direction of the axis O of the coil spring 37 and the housing case 38 in a state where an external force for expanding and contracting the coil spring 37 is not acting. Between the end portions in the direction of the axis O.
Each pressing member 40 is formed with an insertion hole that penetrates in the direction of the axis O and allows the rod 39 to pass therethrough, like the through hole of the housing case 38. However, the hole diameter of the insertion hole is set smaller than the hole diameter of the through hole.

The rod 39 is formed in a rod shape extending in the axis O direction, and is connected to the small diameter portion 41 inserted into both the through hole of the housing case 38 and the insertion hole of the pressing member 40, and both ends of the small diameter portion 41 in the axis O direction. And a pair of large diameter portions 42 having a diameter larger than that of the small diameter portion 41. Here, the diameter of the pair of large diameter portions 42 is set to be smaller than the diameter of the through hole of the housing case 38 and larger than the diameter of the insertion hole of the pressing member 40. For this reason, although the pair of pressing members 40 can be inserted through the through holes of the housing case 38, they are not inserted through the insertion holes of the pressing member 40, and are disposed outside the pair of pressing members 40.
In the restoring mechanism 32 configured in this way, the rod 39 is one side (X-axis negative direction, see FIG. 4A) and the other side (X-axis positive direction, FIG. Even if it moves in any direction of (a), since either one of a pair of large diameter parts 42 presses down holding member 40 from the outside, the interval of a pair of holding members 40 becomes small, and coil spring 37 Will be compressed and deformed.

One end of the rod 39 made of one large diameter portion 42A in the direction of the axis O is connected to the tip of the first arm portion 34 of the swing arm 31 by a rod pin 43, whereby the rod 39 is connected to the first arm. It can be rotated around the axis of the rod pin 43 (around the Y axis) with respect to the portion 34.
Therefore, as shown in FIGS. 4A and 5A, when the swing arm 31 swings, the rod 39 moves in the direction of the axis O with respect to the housing case 38 and the coil spring 37 is compressed. Due to the deformation (elastic deformation), a restoring force (a force for the coil spring 37 to return to the original shape) accompanying the compression deformation of the coil spring 37 acts on the swing arm 31.

Further, in the rod 39 of the present embodiment, a male screw is formed in the small diameter portion 41, and the other end portion of the rod 39 composed of the other large diameter portion 42B is constituted by a nut that is screwed to the small diameter portion 41. . By configuring the rod 39 in this way, the rod 39 can be easily attached to the housing case 38 and the pair of pressing members 40.
In the present embodiment, the distance between the pair of large diameter portions 42 is shown in FIG. 3A so that the elastic deformation of the coil spring 37 is always accompanied when the rod 39 moves in the axis O direction with respect to the housing case 38. ), The distance between the pair of pressing members 40 disposed at the end of the housing case 38 in the direction of the axis O is set to be equal to each other.

In the restoring mechanism 32 of the present embodiment, the dimension in the direction of the axis O in the housing case 38 is set shorter than the natural length of the coil spring 37. Therefore, in this restoring mechanism 32, an initial state in which an external force in the direction of the axis O is not acting on the rod 39 (a state in which the pressing member 40 is not pressed in the direction of the axis O by the rod 39, see FIG. 3A). The coil spring 37 housed in the housing case 38 is given a compressive force (elastic force). In the following description, the compressive force applied to the coil spring 37 is referred to as initial compressive force (initial elastic force).
In the restoring mechanism 32, as described above, the coil spring 37 is compressed and deformed regardless of whether the rod 39 moves to one side or the other side in the axis O direction with respect to the housing case 38. In the initial state, when the external force for moving the rod 39 in the direction of the axis O relative to the housing case 38 is equal to or less than the initial compression force, the rod 39 does not move in the direction of the axis O. On the other hand, when the external force for moving the rod 39 in the direction of the axis O is larger than the initial compressive force, the compression deformation of the coil spring 37 further proceeds and the rod 39 moves in the direction of the axis O with respect to the housing case 38. Will be moved to.

Further, the overhead crane 1 of the present embodiment is provided between the yoke 18 and the tip of the first arm portion 34 constituting the swing arm 31, similar to the restoring mechanism 32 described above. Also provided is a damping mechanism (not shown) that applies a damping force. The damping mechanism may be configured by, for example, a conventionally known oil damper. Specifically, for example, a conventional cylinder casing filled with oil may be provided in the small diameter portion 41 of the rod 39 in the housing case 38.
As described later, the housing 24, the swing arm 31, the restoring mechanism 32, and the damping mechanism described above reduce an excessive load acting on the yoke 18 during an earthquake, and excessive relative movement between the yoke 18 and the traveling unit 6 is achieved. The seismic isolation unit 30 that effectively attenuates is configured. In the present embodiment, since the two traveling parts 6 are attached to the same yoke 18, one seismic isolation unit 30 is provided for each of the same yoke 18 and each traveling part 6. (See FIG. 2).

  In the overhead crane 1 configured as described above, in an initial state in which an external force that attempts to move the traveling unit 6 in the X-axis direction with respect to the crane body 5 does not act on the traveling unit 6, FIG. As shown in b), the traveling portion 6 is disposed at an intermediate position in the longitudinal direction of the track pin 23 (an intermediate position in the width direction of the yoke 18). In this initial state, as shown in FIG. 3A, the extending directions of the first arm portion 34 and the second arm portion 35 of the swing arm 31 are aligned with the vertical direction (Z-axis direction). A swing arm 31 is arranged. Furthermore, in this initial state, no external force in the direction of the axis O acts on the rod 39, and no restoring force that acts on the swing arm 31 is generated on the coil spring 37.

Next, the operation of the overhead crane 1 having the above configuration, particularly, the operation when an earthquake occurs will be described.
As shown in FIG. 3, when an earthquake occurs in an initial state where the overhead crane 1 is arranged on the traveling rail 4 and no external force is applied to the traveling unit 6, an external force in the X-axis direction is applied to the traveling unit 6 due to the earthquake. By acting, the traveling unit 6 tries to move relative to the crane body 5 in the X-axis direction together with the traveling rail 4. Here, when the external force due to the earthquake is equal to or less than the initial compressive force applied to the coil spring 37 in advance, that is, in the case of a small earthquake, the relative positions of the crane body 5 and the traveling unit 6 are the same as the initial state. The crane body 5 and the traveling unit 6 are not moved relative to each other while being held at the same position (initial position).

On the other hand, when the external force due to the earthquake is larger than the initial compression force of the coil spring 37, the traveling unit 6 moves relative to the crane body 5 in the X-axis direction from the initial position as shown in FIGS. . Further, along with this relative movement, the swing arm 31 swings while maintaining the state where the pair of guide rollers 36 sandwich the travel rail 4. Further, in conjunction with the swing of the swing arm 31, the rod 39 moves in the direction of the axis O with respect to the housing case 38, and the coil spring 37 is further compressed and deformed from the initial state.
As the coil spring 37 is further compressed and deformed, a restoring force opposite to the swinging direction of the swinging arm 31 is applied to the swinging arm 31.

  For example, as shown in FIG. 4B, when the traveling unit 6 moves relative to the crane main body 5 in the positive direction of the X axis, the swing arm 31 moves in the opposite direction as shown in FIG. As the rod 39 swings clockwise and the rod 39 moves in the negative direction of the X axis, further compression deformation of the coil spring 37 occurs. In this state, the restoring force of the coil spring 37 acts on the rod 39 so as to move the rod 39 in the positive direction of the X axis. That is, the restoring force of the coil spring 37 acts on the swing arm 31 so as to swing it clockwise.

On the other hand, as shown in FIG. 5B, when the traveling unit 6 moves relative to the crane body 5 in the negative direction of the X axis, the swing arm 31 is moved to the timepiece as shown in FIG. As the rod 39 swings around and moves in the positive X-axis direction, further compression deformation of the coil spring 37 occurs. In this state, the restoring force of the coil spring 37 acts on the rod 39 so as to move the rod 39 in the negative X-axis direction. That is, the restoring force of the coil spring 37 acts on the swing arm 31 so as to swing it counterclockwise.
As described above, when the restoring force of the coil spring 37 acts on the swing arm 31, an excessive load acts on the crane body 5 due to excessive relative movement (swing) of the crane body 5 with respect to the traveling unit 6. Can be prevented.

  Moreover, in the overhead crane 1 of this embodiment, since the damping mechanism is provided similarly to the restoring mechanism 32, as shown in FIGS. 4 and 5, when the crane body 5 and the traveling unit 6 move relative to each other, The damping force of the damping mechanism acts on the swing arm 31, and the excessive relative movement of the crane body 5 and the traveling unit 6 can be effectively attenuated.

As described above, according to the overhead crane 1 of the present embodiment, even if the crane body 5 and the traveling unit 6 move relative to each other, an excessive load is caused by excessive relative movement (swing) of the crane body 5 with respect to the traveling unit 6. Can be prevented from acting on the crane body 5, and excessive relative movement between the crane body 5 and the traveling unit 6 can be effectively attenuated. It is possible to reliably prevent the main body 5 from being damaged.
Furthermore, according to the overhead crane 1, since the swing arm 31, the restoring mechanism 32, and the damping mechanism that constitute the seismic isolation unit 30 are all attached to the side end portion 18a of the yoke 18, the above-described effect can be obtained. Even if the earthquake unit 30 is provided in the overhead crane 1, the height dimension of the overhead crane 1 can be kept low. That is, the seismic isolation unit 30 according to the present embodiment can be easily applied to the overhead crane 1 having a limited space on the traveling rail 4 (particularly the height dimension from the traveling rail 4 to the ceiling 3) as in the present embodiment. It becomes possible to apply.

Further, the seismic isolation unit 30 is arranged on the yoke 18 or the side end 18a of the traveling unit 6 so that the stroke amount in the restoring mechanism 32 or the damping mechanism (the extension length of the coil spring 37 constituting the restoring mechanism 32 or the rod 39). ) Is less likely to be restricted by the space on the traveling rail 4 as in the prior art, and this stroke amount can be sufficiently secured. That is, the swing arm 31, the restoring mechanism 32, and the damping mechanism can sufficiently exhibit the function as the seismic isolation unit 30.
In particular, in the overhead crane 1 of the present embodiment, the length dimension L1 of the first arm part 34 that forms the swing arm 31 is set to be longer than the length dimension L2 of the second arm part 35. Even if the length of the relative movement between the traveling unit 5 and the traveling unit 6 is short, it is possible to ensure a long stroke amount in the restoring mechanism 32 and the damping mechanism. That is, it is possible to further improve the functions of the seismic isolation unit 30.

Further, in the overhead crane 1 of the present embodiment, the stroke direction in the restoring mechanism 32 (the expansion and contraction direction of the coil spring 37 constituting the restoring mechanism 32 and the linear movement direction of the rod 39) is inclined with respect to the vertical direction. While securing a long stroke amount in the restoring mechanism 32 and the damping mechanism, it is possible to suppress an increase in the height dimension of the overhead crane 1 by installing the restoring mechanism 32 and the damping mechanism.
Further, in the initial state where no external force is applied to the traveling unit 6, since the initial compression force is applied to the coil spring 37, it acts on the traveling unit 6 during cargo handling, traveling, or when a small earthquake occurs. When the external force to be performed is small, the crane body 5 and the traveling unit 6 can be prevented from moving relative to each other. In addition, when the external force acting on the traveling unit 6 is large as in the case of a large earthquake, the crane body 5 and the traveling unit 6 are moved relative to each other to reduce the load acting on the crane body 5 as described above. Is possible.

  Further, in the overhead crane 1 of the present embodiment, the tip of the second arm portion 35 of the swing arm 31 is constituted by a pair of guide rollers 36, so that the tip of the second arm portion 35 is moved to the traveling portion 6. The relative movement in the X-axis direction between the crane body 5 and the traveling unit 6 can be converted into the swing of the swing arm 31 without being directly connected to the swing arm 31. Therefore, the swing arm 31 can be easily attached to the overhead crane 1.

In addition, although the overhead crane 1 which concerns on this 1st embodiment can be produced newly, of course, by performing the repair work which attaches the seismic isolation unit 30 to the existing overhead crane installed in the building 2 inside. It is also possible to produce it.
When repairing an existing overhead crane (not shown), first, the traveling unit 6 is attached to the yoke 18 so as to be relatively movable in the rotation axis direction (X-axis direction) of the wheel 22. In this embodiment, the crane main body 5 is jacked up, and then the crane main body 5 is separated above the traveling unit 6. In this state, as shown in FIG. 3B, the track pin 23 is inserted into the travel unit 6 (main body unit 21) so that the travel unit 6 can move in the axial direction with respect to the track pin 23. At the same time, both ends of the track pin 23 in the axial direction are fixed to the pair of support portions of the yoke 18.

Next, the swing arm 31 is attached to each side end portion 18a of the yoke 18 so as to be swingable about the Y axis. In the present embodiment, the swing arm 31 is attached to the housing 24 so as to be swingable by the arm pin 33, and the axis direction of the swing shaft 33 of the swing arm 31 including the arm pin 33 is the Y axis. The housing 24 is fixed to the side end portion 18a of the yoke 18 so as to be parallel to the direction.
Thereafter, a restoring mechanism 32 for applying a restoring force to the swing arm 31 is provided between the yoke 18 and one swing end of the swing arm 31. In the present embodiment, the housing case 38 of the restoring mechanism 32 is fixed to the housing 24, and one large diameter portion 42 </ b> A of the rod 39 is connected to the tip of the first arm portion 34 of the swing arm 31 by the rod pin 43. . Therefore, the housing case 38 is fixed to the housing 24 and the rod 39 and the swing arm 31 are connected to each other, for example, before the housing 24 is fixed to the side end portion 18a of the yoke 18. It may be carried out simultaneously with the attachment of 31.

  Finally, by connecting the tip of the second arm portion 35 of the swing arm 31 to the travel portion 6 so that the relative movement between the yoke 18 and the travel portion 6 is converted into the swing of the swing arm 31, Renovation of overhead crane is completed. In the present embodiment, the distal end of the second arm portion 35 is constituted by a pair of guide rollers 36, and the pair of guide rollers 36 are disposed so as to sandwich the traveling rail 4, thereby traveling via the traveling rail 4. It will be connected to the part 6. Therefore, the connection between the tip of the second arm portion 35 and the traveling portion 6 may be performed at the same time as, for example, attaching the swing arm 31 to the yoke 18, or, for example, simultaneously with placing the overhead crane 1 on the traveling rail 4. It may be done.

Since the overhead crane modified as described above becomes the overhead crane 1 of the present embodiment shown in FIGS. 1 to 5, the same effect as the above-described overhead crane 1 is achieved.
Further, according to this modification method, the crane body 5 is jacked up when the yoke 18 and the traveling unit 6 are connected by the track pin 23, but the height of jacking up is small. Further, when the swing arm 31 or the restoring mechanism 32 constituting the seismic isolation unit 30 is attached, it is not necessary to jack up the crane body 5. Further, since the second arm portion 35 is not directly connected to the traveling portion 6, the swing arm 31 and the restoring mechanism 32 can be easily attached to the existing overhead crane 1, and the swing arm 31 and the restoring mechanism can be easily attached. The construction cost for installing 32 can also be kept low.

In the overhead crane 1 according to the first embodiment, the axis O direction of the restoring mechanism 32 is fixed to the housing 24 so as to be inclined by 90 degrees with respect to the vertical direction (Z-axis direction). There is no problem as long as at least the axis O direction of the restoring mechanism 32 is inclined with respect to the vertical direction (Z-axis direction).
Accordingly, the axis O direction of the restoring mechanism 32 may be inclined obliquely so that the rod 39 extends upward from the connecting portion of the swing arm 31 with the first arm portion 34, as shown in FIG. For example, the rod 39 may be inclined obliquely so as to extend downward. In this case, the width dimension of the seismic isolation unit 30 can be kept small. However, in order to prevent interference between the restoring mechanism 32 and the swing arm 31, it is preferable to set the direction of the axis O of the restoring mechanism 32 as shown in FIG.

In the first embodiment, the two arm portions 34 and 35 extending from the arm pin 33 extend in opposite directions. For example, as shown in FIG. The existing direction may be inclined with respect to the extending direction (Z-axis direction) of the second arm portion 35.
In this case, the height position of the connecting portion (rod pin 43) between the first arm portion 34 and the rod 39 with respect to the arm pin 33 is set low while ensuring the length L1 of the first arm portion 34 to be long. It becomes possible to do. In this case, since the housing case 38 of the restoring mechanism 32 can be disposed above the arm pin 33, the width dimension of the seismic isolation unit 30 can be further reduced.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS. The overhead crane according to this embodiment is mainly composed of a connection structure between the traveling unit 6 and the swing arm, and the restoring mechanism 32 and the damping mechanism for the yoke 18 as compared with the overhead crane 1 of the first embodiment. Only the mounting structure is different. For this reason, in this embodiment, the same code | symbol is attached | subjected about the part same as the component of the overhead crane 1 of 1st embodiment, and the description is abbreviate | omitted.

As shown in FIGS. 7 and 8, in the overhead crane of the present embodiment, the housing 24 is integrally fixed to the side end portion 18a of the yoke 18 as in the first embodiment, and the swing arm 51, the restoring mechanism, 32 and a damping mechanism (not shown) are attached to the side end 18 a of the yoke 18 via the housing 24.
Similarly to the first embodiment, the swing arm 51 is attached to the housing 24 by an arm pin (swing shaft) 53 extending in the Y-axis direction, and the arm pin 53 with respect to the yoke 18 and the housing 24. Is supported so as to be swingable around the axis (around the axis parallel to the extending direction of the traveling rail 4, around the Y axis). The arm pin 53 is positioned below the lower end of the yoke 18. Further, the tip (one swing end) of the first arm portion 54 extending upward from the arm pin 53 of the swing arm 51 is rod-shaped by the rod pin 43 and the rod 39 of the restoring mechanism 32 as in the first embodiment. It is connected to.

On the other hand, in the swing arm 51 of the present embodiment, the second arm portion 55 extending downward from the arm pin 53 extends so as to be inclined obliquely with respect to the extending direction of the first arm portion 54. Yes. However, also in this swing arm 51, the length dimension L1 of the first arm portion 54 is set longer than the length dimension L2 of the second arm portion 55, as in the first embodiment.
And the front-end | tip (other rocking | fluctuation end) of the extension direction of the 2nd arm part 55 is connected with the bracket 56 distribute | arranged on the traveling rail 4 by the bracket pin 57 extended in a Y-axis direction. That is, the bracket 56 is supported so as to be rotatable about the axis of the bracket pin 57 (around the Y axis) with respect to the tip of the second arm portion 55. The bracket 56 is fixed to the main body 21 of the traveling unit 6 by a connecting member 58 and can move in the X-axis direction with respect to the yoke 18 together with the traveling unit 6.
As described above, in the present embodiment, the distal end of the second arm portion 55 of the swing arm 51 is connected to the traveling portion 6 via the bracket 56 and the connecting member 58.

  Furthermore, in this embodiment, a pair of guide rollers 59 that sandwich the traveling rail 4 from the width direction (X-axis direction) is provided on the bracket 56 disposed on the traveling rail 4. Similar to the guide roller 36 of the first embodiment, the pair of guide rollers 59 rotate around the Z axis and roll on the side surface of the traveling rail 4 when the overhead crane travels on the traveling rail 4. It is configured as follows. Thereby, in a state where the overhead crane is arranged on the traveling rail 4, the tip of the second arm portion 55 of the swing arm 51 is connected to the traveling portion 6 through the pair of guide rollers 59 and the traveling rail 4 of the bracket 56. Will be.

  As described above, in the state in which the traveling unit 6 and the tip of the second arm portion 55 of the swing arm 51 are connected, the traveling unit 6 and the bracket 56 are moved by an earthquake or the like, as in the first embodiment. When the traveling rail 4 and the crane main body 5 move relative to each other in the X-axis direction, the swing arm 51 swings while maintaining the state where the pair of guide rollers 59 sandwich the traveling rail 4. However, in the present embodiment, since the bracket 56 is pivotally attached to the tip of the second arm portion 55 but is fixed to the traveling portion 6, even if the swing arm 51 swings, a pair of The rotation axis of the guide roller 59 is held in a state parallel to the Z-axis direction and is not inclined as in the first embodiment.

As described above, one end portion of the rod 39 constituting the restoring mechanism 32 and the damping mechanism in the direction of the axis O is connected to the tip end of the first arm portion 54 by the rod pin 43. The arm portion 54 is rotatable around the axis of the rod pin 43 (around the Y axis).
On the other hand, the housing case 38 constituting the restoring mechanism 32 and the damping mechanism is connected to the housing 24 by a case pin 61 extending in the Y-axis direction. Thus, the housing case 38 and the rod 39 are attached to the yoke 18 and the housing 24 so as to be rotatable around the axis of the case pin 61 (around the Y axis). For this reason, when the storage case 38 and the rod 39 rotate, the axis O direction of the storage case 38 and the rod 39 changes.

The operation of the overhead crane of the present embodiment configured as described above will be described.
As shown in FIG. 8, in the initial state where the overhead crane is arranged on the traveling rail 4 and no external force is applied to the traveling unit 6, the external force in the X-axis direction acting on the traveling unit 6 due to an earthquake or the like is restored. When it is below the initial compression force previously given to the coil spring 37 (refer FIG. 3 etc.) with which the mechanism 32 is provided, the crane main body 5 and the traveling part 6 do not move relatively similarly to 1st embodiment.
On the other hand, when the external force due to an earthquake or the like is larger than the initial compression force of the coil spring 37, the traveling unit 6 and the bracket 56 are connected to the crane body 5 while the pair of guide rollers 59 holds the traveling rail 4 in between. Relative movement (parallel movement) in the X-axis direction. Further, with this relative movement, the swing arm 51 connected to the bracket 56 swings.

Further, in conjunction with the swing of the swing arm 51, the rod 39 moves in the direction of the axis O with respect to the housing case 38 and the coil spring 37 is further compressed and deformed from the initial state, as in the first embodiment. . As the coil spring 37 is further compressed and deformed, a restoring force opposite to the swinging direction of the swinging arm 51 described above acts on the swinging arm 51.
When the swing arm 51 swings as described above, the tip of the first arm portion 54 slightly moves up and down in the vertical direction (Z-axis direction). Since the housing case 38 and the rod 39 of the mechanism 32 and the damping mechanism are rotatable by the case pin 61, the housing case 38 and the rod 39 are also swung following the swing of the swing arm 51. Become.

As explained above, according to the overhead crane of this embodiment, there exists an effect similar to 1st embodiment.
Furthermore, in the overhead crane according to the present embodiment, the tip of the second arm portion 55 of the swing arm 51 is connected to the traveling portion 6 via the bracket 56 and the connecting member 58, so that the crane main body 5 and the traveling portion 6 are connected. As a result of relative movement between the bracket 56 and the traveling portion 6, stress may be generated by relative movement of the bracket 56 and swing of the swing arm 51. Here, in this embodiment, since the tip of the second arm portion 55 is connected to the traveling portion 6 through the pair of guide rollers 59 and the traveling rail 4, the stress described above is caused by the bracket 56 by the connecting member 58. And the traveling portion 6, and the coupling portion between the pair of guide rollers 59 and the traveling rail 4. That is, it is possible to reduce the stress generated in the connection portion between the bracket 56 and the traveling portion 6 by the connection member 58.

  Further, in the overhead crane of the present embodiment, the housing case 38 and the rod 39 constituting the restoring mechanism 32 are rotatably attached to the yoke 18, so that the housing can follow the swing of the swing arm 51. Since the case 38 and the rod 39 are also oscillated and the linear movement direction of the rod 39 is changed, it is possible to prevent stress from being generated in the housing case 38, the rod 39, or the connecting portion between the rod and the oscillating arm 51.

In addition, the overhead crane which concerns on 2nd embodiment is by performing the repair work which attaches a seismic isolation unit to the existing overhead crane 1 installed in the building 2 like the case of the overhead crane 1 of 1st embodiment. It can be manufactured, and this repair method is the same as that of the first embodiment.
Of the configurations of the second embodiment described above, the structure for attaching the restoring mechanism 32 and the damping mechanism to the yoke 18 (the structure for attaching the housing case 38 to the yoke 18 with the case pin 61) is shown in FIGS. The present invention can be applied to both the configuration of the first embodiment and the configuration of the modification of the first embodiment shown in FIG.

[Third embodiment]
Next, a third embodiment of the present invention will be described with reference to FIG. In addition, the overhead crane according to this embodiment is compared with the overhead crane of the second embodiment, the attachment structure of the restoring mechanism 32 and the damping mechanism to the yoke 18, the connection structure of the swing arm 51 and the bracket 56, and Only the connection structure between the swing arm 51 and the restoring mechanism 32 and the rod 39 of the damping mechanism is different. For this reason, in this embodiment, the same code | symbol is attached | subjected about the part same as the component of the overhead crane of 2nd embodiment, and the description is abbreviate | omitted.

That is, as shown in FIG. 9, in the overhead crane of the present embodiment, the housing case 38 constituting the restoring mechanism 32 and the damping mechanism has the axis O direction in the vertical direction (Z-axis direction) as in the first embodiment. It is fixed to the housing 24 so as to be inclined by 90 degrees.
A long extension extending in the extending direction of the first arm portion 54 is provided at the tip of the first arm portion 54 of the swing arm 51 connected to the rod 39 constituting the restoring mechanism 32 and the damping mechanism by the rod pin (projection) 43. A hole 71 is formed. On the other hand, the rod pin 43 is formed integrally with one end portion of the rod 39 in the axis O direction, is inserted into the long hole 71 and is slidable in the longitudinal direction of the long hole 71.
As described above, since the swing arm 51 and the rod 39 are connected, when the swing arm 51 swings, the rod pin 43 slides in the longitudinal direction of the long hole 71 so that the rod 39 Will move in the direction of the axis O. That is, in this configuration, the swing of the swing arm 51 is converted into the movement of the rod 39 in the direction of the axis O by the rod pin 43 and the long hole 71.

In the overhead crane of the present embodiment, a bracket pin (projection) 57 is integrally formed at the tip of the second arm portion 55 of the swing arm 51. On the other hand, the bracket 56 is formed with a long hole 72 into which the bracket pin 57 is inserted. The elongated hole 72 extends in the Z-axis direction, and the bracket pin 57 inserted into the elongated hole 72 is slidable in the longitudinal direction of the elongated hole 72.
As described above, since the swing arm 51 and the bracket 56 are connected, when the bracket 56 moves in the X-axis direction with respect to the yoke 18 together with the traveling portion 6, the bracket pin 57 is a long hole. The swing arm 51 swings by sliding in the longitudinal direction of 72. That is, in this configuration, the movement of the bracket 56 in the X-axis direction is converted into the swing of the swing arm 51 by the bracket pin 57 and the long hole 72.

The operation of the overhead crane of the present embodiment configured as described above is performed in the same manner as in the first embodiment and the second embodiment described above. Therefore, according to the overhead crane of this embodiment, there exists an effect similar to 1st, 2nd embodiment.
Furthermore, according to the overhead crane of this embodiment, the bracket pin 57 fixed to the swing arm 51 and the long hole 72 of the bracket 56 cause the bracket 56 to move in the X-axis direction to swing the swing arm 51. Since it is converted, it is possible to reliably prevent stress from being applied to the connecting portion between the bracket 56 and the traveling portion 6.
Further, since the swing of the swing arm 51 is converted into the movement of the rod 39 in the direction of the axis O by the rod pin 43 fixed to the rod 39 and the long hole 71 of the swing arm 51, the housing case 38 is connected to the crane body 5. Even if the linear movement direction of the rod 39 is fixed to the rod 39, it is possible to reliably prevent stress from being generated in the rod 39 and the housing case 38 of the restoring mechanism 32.

In the third embodiment, the rod pin 43 is formed integrally with the rod 39 and the long hole 71 is formed at the tip of the first arm portion 54 of the swing arm 51. The rod pin 43 is integrally formed at the tip of the first arm portion 54 so that the swing of the arm 51 is converted into the movement of the rod 39 in the direction of the axis O, and the rod pin 43 is inserted into the rod 39 and slid. A long hole that can be moved may be formed.
In addition, the bracket pin 57 is integrally formed at the tip of the second arm portion 55 of the swing arm 51 and the elongated hole 72 is formed in the bracket 56. For example, in the X-axis direction of the bracket 56, The bracket pin 57 is integrally formed with the bracket 56 so that the movement of the swing arm 51 is converted into the swing of the swing arm 51, and the bracket pin 57 is attached to the tip of the second arm portion 55 of the swing arm 51. A long hole that can be inserted and slid may be formed.

Furthermore, the overhead crane according to the third embodiment performs a repair work for attaching the seismic isolation unit to the existing overhead crane 1 installed in the building 2 as in the case of the overhead crane 1 of the first and second embodiments. It is possible to produce by doing, and this repair method is the same as that of the first embodiment.
And the structure of 3rd embodiment mentioned above is the structure of 1st embodiment shown in FIGS. 3-5, the structure of the modification of 1st embodiment shown in FIG. 6, and 2nd embodiment shown in FIG. It can be applied to any of the configurations.

Although the details of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.
For example, in the second and third embodiments, the tip of the second arm portion 55 of the swing arm 51 is connected to the traveling portion 6 via the bracket 56 and the connecting member 58, but this is not a limitation. For example, you may connect with the driving | running | working part 6 directly. In the configuration of the second and third embodiments, for example, the pair of guide rollers 59 may not be provided.
Furthermore, the main body portion 21 of the traveling portion 6 and the distal ends of the second arm portions 35 and 55 of the swing arms 31 and 51 are not limited to being connected as in all the embodiments described above, but at least the yoke 18 and What is necessary is just to connect so that the relative movement to the main-body part 21 to the X-axis direction may be converted into the rocking | swiveling arm 31 rocking | swiveling.

  Further, the restoring mechanism 32 of the above-described embodiment is configured such that the restoring force of the restoring mechanism 32 acting on the swing arms 31 and 51 is generated only by the compression deformation of the coil spring 37. What is necessary is just to be comprised so that a restoring force may be acted with respect to the rocking | fluctuating arms 31 and 51, when the traveling part 6 moves relatively. Therefore, the restoring mechanism 32 may be configured such that the restoring force of the restoring mechanism 32 acting on the swing arms 31 and 51 is generated only by, for example, the extension deformation of the coil spring 37. In this case, the coil spring 37 is extended and deformed in an initial state in which no external force is applied to the yoke 18 and the traveling unit 6, that is, in an initial state in which no restoring force is applied to the swing arms 31 and 51. An extension force (elastic force) may be applied to the coil spring 37. As described above, if an initial extension force is applied to the coil spring 37, the crane body 5 and the traveling body 6 travel as long as an external force larger than the initial extension force does not act on the traveling unit 6 as in the case of the above embodiment. The part 6 does not move relative.

Further, the restoring mechanism 32 may be configured such that the restoring force of the restoring mechanism 32 acting on the swing arms 31 and 51 is generated by, for example, both compression deformation and extension deformation of the coil spring 37. That is, the coil spring 37 may be compressed and deformed when the rod 39 moves to one side in the axis O direction with respect to the housing case 38, and the coil spring 37 may be extended and deformed when moved to the other side in the axis O direction. . In this case, when the rod 39 moves to the one side in the axis O direction with respect to the housing case 38, the restoring force of the restoring mechanism 32 acts on the swing arms 31 and 51 due to the compressive deformation of the coil spring 37. Further, when the rod 39 moves to the other side in the axis O direction with respect to the housing case 38, the restoring force of the restoring mechanism 32 acts on the swing arms 31 and 51 due to the extension deformation of the coil spring 37.
When the restoring force of the restoring mechanism 32 acting on the swing arms 31 and 51 is generated by both the compression deformation and the extension deformation of the coil spring 37, the restoring mechanism 32 may be configured by only the coil spring 37, for example. . In this case, both ends of the coil spring 37 may be connected to the housing 24 (or the yoke 18) and the tip of the first arm portion 34 of the swing arm 31, respectively.

Further, the configuration in which the restoring force is applied to the swing arm 31 in the restoring mechanism 32 is not limited to the coil spring 37 as in the above-described embodiment, and can be elastically expanded and contracted at least in the direction of the axis O of the housing case 38. Any elastic member may be used, for example, rubber.
Further, the swing arms 31 and 51 are attached to the yoke 18 (the crane body 5) by the arm pins 33 and 53, and the restoring mechanism 32 is disposed between the yoke 18 and the tip of the first arm portion 34 of the swing arm 31. For example, the swing arms 31 and 51 are attached to the main body 21 of the traveling unit 6 by the arm pins 33 and 53, and the restoring mechanism 32 is connected between the main body 21 and the swing arms 31 and 51. It may be provided between them. In this case, since the restoring mechanism 32 is arranged below compared to the above embodiment, the center of gravity of the overhead crane 1 can be set low. Moreover, since the crane main body 5 is reduced in weight, even when the crane main body 5 and the traveling unit 6 move relative to each other in the X-axis direction when an earthquake occurs, the magnitude of this relative movement can be kept small.

Moreover, although the seismic isolation unit 30 in the overhead crane of the above-described embodiment is provided with the damping mechanism, it is only necessary to include at least the swing arm 31 and the restoring mechanism 32.
Furthermore, although the girder main body 17 and the yoke 18 which comprise the crane main body 5 are connected by the yoke pin 19, it may be fixed integrally, for example.
Moreover, the crane main body 5 and the traveling part 6 do not need to be connected by the track pin 23, and may be connected to each other so as to be relatively movable in at least the X-axis direction.

  The crane apparatus and the repair method thereof according to the present invention are not limited to being applied to the overhead crane 1 as in the above-described embodiment, but are traveling cranes that can travel at least on the traveling rails 4 and suspend loads. Applicable to the device. Therefore, the crane apparatus and the repair method thereof according to the present invention can be applied to, for example, an outdoor crane apparatus.

DESCRIPTION OF SYMBOLS 1 ... Overhead crane (crane apparatus), 4 ... Traveling rail, 5 ... Crane main body, 6 ... Traveling part, 7 ... Suspension means, 18 ... Yoke, 18a ... Side edge part, 22 ... Wheel, 30 ... Seismic isolation unit, DESCRIPTION OF SYMBOLS 31 ... Swing arm, 32 ... Restoration mechanism, 33 ... Arm pin (rocking shaft), 34 ... First arm part, 35 ... Second arm part, 36 ... Guide roller, 37 ... Coil spring (elastic member), 38 ... Housing case, 39 ... Rod, 43 ... Rod pin (projection), 51 ... Oscillating arm, 53 ... Arm pin (oscillating shaft), 54 ... First arm part, 55 ... Second arm part, 56 ... Bracket 57 ... Bracket pins (projections), 58 ... Connecting members, 59 ... Guide rollers, 71 ... Long holes, 72 ... Long holes

Claims (12)

In a crane device that can travel on a traveling rail and hangs a load,
A crane body having a suspension means for hanging a load;
A traveling unit having a wheel that is rotatable so as to roll on the traveling rail, and attached to the crane body so as to be relatively movable in a rotation axis direction of the wheel;
A swing arm supported on one of the crane main body and the traveling portion at a side end in the extending direction of the traveling rail so as to be swingable about an axis parallel to the extending direction;
A restoring mechanism that is provided between one of the crane body and the traveling unit and one swinging end of the swinging arm and applies a restoring force to the swinging arm;
The other swing end of the swing arm is connected to the other of the crane body and the travel portion so that the relative movement between the crane body and the travel portion is converted into swing of the swing arm. A crane apparatus characterized by comprising:   The distance from the swing axis of the swing arm to the one swing end is set to be longer than the distance from the swing axis of the swing arm to the other swing end. The crane apparatus according to claim 1. The restoration mechanism includes an elastic member that can be elastically deformed elastically,
The crane apparatus according to claim 1, wherein the elastic member is inclined with respect to a vertical direction. The restoration mechanism includes an elastic member that can be elastically deformed elastically,
The restoring force acting on the swing arm is generated only by one elastic deformation of compression deformation and extension deformation of the elastic member,
The elastic force by said one elastic deformation is given to the said elastic member in the initial state in which the external force is not acting on the said driving | running | working part, The any one of Claims 1-3 characterized by the above-mentioned. Crane equipment.   A damping mechanism is provided between one of the crane body and the traveling unit and one swinging end of the swinging arm, and applies a damping force to the swinging arm. The crane apparatus according to any one of claims 1 to 4. The swing arm is attached to the crane body;
The other oscillating end of the oscillating arm is configured by a pair of guide rollers that sandwich the traveling rail from the width direction thereof. Crane equipment. The swing arm is attached to the crane body;
The other swing end of the swing arm is connected to a bracket disposed on the travel rail,
The crane apparatus according to any one of claims 1 to 5, wherein the bracket is fixed to the traveling portion by a connecting member.   The crane apparatus according to claim 7, wherein the bracket is provided with a pair of guide rollers that sandwich the traveling rail from the width direction thereof. A protrusion is formed on one of the other swing end and the bracket, and an elongated hole is formed on the other swing end and the other of the bracket,
When the projection is inserted into the slot, the projection can slide in the longitudinal direction of the slot so as to convert the movement of the bracket in the direction of the rotation axis into the swing of the swing arm. The crane device according to claim 7 or 8, wherein The restoring mechanism includes an elastic member that can elastically expand and contract, a storage case that stores the elastic member, and a rod that moves linearly with respect to the storage case so as to expand and contract the elastic member,
The rod is connected to the one swing end of the swing arm;
10. The storage case according to claim 1, wherein the housing case is attached to one of the crane body and the traveling unit so as to be rotatable about an axis parallel to the extending direction. The crane apparatus according to item 1. The restoring mechanism includes an elastic member that can elastically expand and contract, a storage case that stores the elastic member, and a rod that moves linearly with respect to the storage case so as to expand and contract the elastic member,
A protrusion is formed on one of the rod and the one swinging end of the swinging arm, and a long hole for inserting the protrusion is formed on the other swinging end and the other of the bracket,
When the protrusion is inserted into the elongated hole, the protrusion can slide in the longitudinal direction of the elongated hole so as to convert the movement of the rod in the telescopic direction into the swing of the swing arm. The crane apparatus according to any one of claims 1 to 10, wherein the crane apparatus is configured. A crane main body having a suspension means for suspending a load is provided on a traveling section that has wheels that are rotatable so as to roll on the traveling rail and is capable of traveling on the traveling rail. A method of repairing a crane apparatus,
Attaching the traveling unit to the crane body so as to be relatively movable in the direction of the rotation axis of the wheel;
A step of attaching a swing arm to a side end portion in the extending direction of the traveling rail of one of the crane body and the traveling portion so as to be swingable about an axis parallel to the extending direction;
Providing a restoring mechanism for applying a restoring force to the swing arm between one of the crane body and the traveling unit and one swing end of the swing arm;
The other swing end of the swing arm is connected to the other of the crane body and the travel portion so that the relative movement between the crane body and the travel portion is converted into swing of the swing arm. And a method for repairing a crane device.

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