JP6464000B2 - Seismic isolation structure for rail-type traveling machines - Google Patents

Description

  The present invention relates to a seismic isolation structure for a rail-type traveling machine that can prevent damage caused by an earthquake up to a medium scale with a simple configuration in a rail-type traveling machine used in a harbor portion or the like.

  Generally, in a harbor portion or the like, a large rail-type traveling machine is used as a transport machine for loading and unloading a cargo such as a container.

  There are various types of rail-type traveling machines, such as a container crane as shown in FIG. 11 and an unloader (not shown), but the configuration of the traveling unit 2 is substantially the same. Will be described as an example.

  A quay 4 facing the harbor 3 is provided with a rail (sea-side rail) 5 and a rail (land-side rail) 6, and the traveling unit 2 of the rail-type traveling machine (container crane) 1 includes rails 5 and 6. A support leg (sea-side support leg) 9 and a support leg (land-side support leg) 10 each provided with a traveling device 8 having wheels 7 that can roll along the same are fixed to the horizontal member 11 integrally. The configuration is as follows.

  In such a rail-type traveling machine 1, when an earthquake occurs, a horizontal excitation force A perpendicular to the traveling direction (perpendicular to the paper surface) of the rail-type traveling machine 1 is a rail-type traveling force. (Hereinafter, in the rail type traveling machine, the traveling direction of the rail type traveling machine is “traveling direction” or “front-rear direction”, and the horizontal direction orthogonal to the traveling direction is “width direction”. Or “left-right direction”). This excitation force A is transmitted to and supported by the rails 5 and 6 by the support legs 9 and 10, respectively. At this time, if the excitation force A is large, the support legs 9 and 10 are bent and damaged. there's a possibility that. Therefore, as a means for solving such a problem, a vibration damping mechanism made of an elastic material or a low friction material is installed on the support leg of the traveling unit and other components to absorb and attenuate the excitation force caused by the earthquake. Recently, it has been proposed (see, for example, Patent Document 1 below).

JP 2002-104773 A

  In the rail-type traveling machine described in Patent Document 1, the base-isolated structure 12 is provided at the upper position of the support legs 9 and 10 of the traveling unit 2 as in the rail-type traveling machine 1 shown in FIG. . This seismic isolation structure 12 divides the support legs 9 and 10 vertically at the upper position close to the horizontal member 11 respectively, and at the opposite end portions of the divided upper members 9a and 10a and lower members 9b and 10b, Upper and lower flange portions 13 and 14 that can be connected to each other are provided. The opposing surfaces of the upper and lower flange portions 13 and 14 have a contact surface 15, and gaps 16 and 17 are formed on the outer side in the width direction of the corresponding contact surface 15. And the part in which the clearance gaps 16 and 17 of the flange parts 13 and 14 were formed is connected with the connection tool 19 via the elastic materials 18, such as a disk spring, and bending of the support legs 9 and 10 by the exciting force A is permitted. However, the vibration force A is absorbed and attenuated.

  However, the seismic isolation structure 12 as described above is large in size as a whole, and uses a large number of elastic members 18 such as disc springs, and therefore tends to be expensive. Further, since the support legs 9 and 10 are incorporated at an upper position near the horizontal member 11, the structure of the entire leg portion including the horizontal members 11 and the support legs 9 and 10 is incorporated with the case where the seismic isolation structure 12 is incorporated. It is very different from the case of not. For this reason, there was a problem that it was difficult to incorporate the seismic isolation structure into the existing rail type traveling machine.

  In view of such circumstances, the present invention intends to provide a seismic isolation structure for a rail-type traveling machine that can be easily incorporated into an existing rail-type traveling machine with a small and simple configuration.

The present invention provides an upper structure including an upper member and a lower structure including a lower member at least at one place in a traveling device that includes wheels that can roll with respect to a rail and supports a support leg of a rail-type traveling machine. A pair of tilting pins that extend in the width direction along the two sides in the direction orthogonal to the direction of travel of the opposing surfaces of the upper member and the lower member that face each other. A restraint mechanism comprising: a link mechanism, wherein one of the pair of links is rotatable with respect to the upper member about a link pin provided coaxially with one end of the tilt pin. And the other end of the pair of links is pivotally connected to the lower member around a link pin provided coaxially with the other of the tilting pins. The end on the side is the same as one of the tilt pins The link pin provided in the center is pivotally connected to the lower member, and the other end is coaxially provided with the other of the tilt pins and the link pin is provided as a center with respect to the upper member. It is related with the seismic isolation structure of the rail type traveling machine characterized by being connected so that rotation is possible.

Thus, in this way, it is not necessary to significantly change the structure of the rail-type traveling machine when incorporating the seismic isolation structure, and it can be easily incorporated into the existing rail-type traveling machine. It can effectively sway the shaking in the width direction due to earthquakes up to the scale. Moreover, it can prevent that the upper structure containing the said upper member displaces so that it may float with respect to the lower structure containing the said lower member.

  The seismic isolation structure for the rail-type traveling machine according to the present invention preferably includes a stopper mechanism that limits a range of tilting of the lower member relative to the upper member, and in this way, the lower member relative to the upper member. It is possible to prevent the rail-type traveling machine from collapsing due to excessive displacement in the width direction.

  In the seismic isolation structure for a rail-type traveling machine according to the present invention, the stopper mechanism is directed from one of the upper structure including the upper member and the lower structure including the lower member to the outside in the other width direction. In this manner, the displacement in the width direction of the lower structure including the lower member with respect to the upper structure including the upper member can be simplified with the above configuration. Can be limited.

  In the seismic isolation structure for a rail-type traveling machine according to the present invention, the stopper mechanism includes a link having both ends rotatably connected to the upper member and the lower member about a horizontal axis. At least one of the both ends of the upper and lower members can be connected to the upper member or the lower member via a long hole, and in this way, the upper member including the upper member can be configured with a simple structure. The displacement in the width direction of the lower structure including the lower member with respect to the structure can be limited.

  In the seismic isolation structure for a rail-type traveling machine of the present invention, the traveling device has at least one equalizer beam that is swingably attached to an upper member by a rocker pin having an axis perpendicular to the traveling direction. In addition, at least one of the equalizer beams can be divided into the upper member and the lower member, and in this way, a reliable seismic isolation effect can be obtained by a small and simple seismic isolation structure. be able to.

  According to the seismic isolation structure for a rail-type traveling machine of the present invention, it is possible to achieve an excellent effect that it can be easily incorporated into an existing rail-type traveling machine with a small and simple configuration.

It is a schematic front view which shows the traveling part of the rail type traveling machine to which the seismic isolation structure of the rail type traveling machine of the present invention is applied. It is a side view which shows the traveling apparatus of the rail type traveling machine to which the seismic isolation structure of the rail type traveling machine of the present invention is applied. It is a side view which shows the principal part of the traveling apparatus of the rail type traveling machine to which the seismic isolation structure of the rail type traveling machine of the present invention is applied. It is a schematic front view which shows the principal part of the traveling apparatus of the rail type traveling machine which applied the seismic isolation structure of the rail type traveling machine of this invention, and is a IV-IV direction arrow line view of FIG. It is a schematic plan view which shows the principal part of the seismic isolation structure of the rail-type traveling machine of this invention. It is a schematic front view which shows the principal part of the seismic isolation structure of the rail-type traveling machine of this invention. It is a schematic front view which shows the action | operation of the seismic isolation structure of the rail-type traveling machine of this invention, (a) is a non-operation state, (b) shows an operation state. It is a front view which shows another example of the principal part of the seismic isolation structure of the rail type traveling machine of this invention, (a) is a non-operation state, (b) shows an operation state. It is a conceptual diagram which shows the action | operation of the seismic isolation structure of the rail-type traveling machine of this invention, (a) shows the state inclined in one direction, (b) shows the state inclined in another direction. It is a conceptual diagram which shows the action | operation of the seismic isolation structure of the rail-type traveling machine of this invention, (a) shows the virtual operation | movement of one link, (b) shows the virtual operation | movement of the other link. It is a schematic front view which shows an example of the conventional rail type traveling machine. It is a schematic front view which shows an example of the traveling part of the conventional rail type traveling machine.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIGS. 1-10 shows an example of the form of the seismic isolation structure of the rail type traveling machine by implementation of this invention, In the figure, the part which attached | subjected the code | symbol same as FIG. 11, FIG. The basic configuration is the same as the conventional one shown in FIGS.

  The traveling part 102 of the rail-type traveling machine 100 according to the present embodiment can roll along the rails 5 and 6 as shown in FIG. 1, as with the traveling part 2 of the conventional rail-type traveling machine 1 (see FIG. 12). The support legs 109 and 110 each having the traveling device 20 with the appropriate wheels 7 are integrally fixed to the horizontal member 11, but in the case of the rail-type traveling machine 100 of this embodiment, the support legs 109 and 110 are supported. A small seismic isolation structure 21 is incorporated in the traveling device 20 provided in the lower part of the vehicle.

  A total of four traveling devices 20 are provided at the lower part of the pair of sea-side support legs 109 and the lower part of the pair of land-side support legs 110 that constitute the traveling part 102 of the rail-type traveling machine 100, and support the traveling part 102 at four corners. Thus, the apparatus travels on the rails 5 and 6 and includes a plurality of wheels 7 as shown in FIG. Here, an eight-wheel type traveling device 20 having eight wheels 7 per unit is illustrated.

  In this traveling device 20, a large equalizer beam (upper equalizer beam) 23 can swing in the front-rear direction via rocker pins 22 extending in the width direction (perpendicular to the paper surface) below the support legs 109 and 110. Medium equalizer beams (intermediate equalizer beams) 25a and 25b are attached to the front end and lower end of the upper equalizer beam 23 via rocker pins 24 so as to be swingable back and forth. Further, small equalizer beams (lower equalizer beams) 27a and 27b are attached to the lower part of the front end and the rear end of one intermediate part equalizer beam 25a via rocker pins 26 so as to be swingable back and forth, and the other Small equalizer beams (lower equalizer beams) 27c and 27d are attached to the lower part of the front end and the rear end of the intermediate equalizer beam 25b through rocker pins 26 so as to be swingable back and forth. Wheels 7 running on rails 5 and 6 are attached to the front and rear of the lower equalizer beams 27a, 27b, 27c and 27d, respectively.

  Of the sea-side support leg 109 and the land-side support leg 110, or the structure that supports them, at least one place on each of the sea-side support leg 109 and the land-side support leg 110, as shown in FIG. Is provided with a travel stopper 28 for preventing the rolling. In this embodiment, the travel stopper 28 is provided on the lower equalizer beam 27b, a horizontal fulcrum pin 28a attached to the lower equalizer beam 27b, and a lever 28b attached to be rotatable about the fulcrum pin 28a. And a pin 28c attached to one end of the lever 28b in parallel with the fulcrum pin 28a, and a brake rod 28d attached to the lever 28b so as to be rotatable about the pin 28c. is there. The end of the lever 28b on the side where the pin 28c is not attached is configured as a handle portion 28e that can be moved up and down by hand. When the rail-type traveling machine 100 is stopped, the brake rod 28d is lowered by pushing up the handle portion 28e to engage the lower end with the ground or the rails 5 and 6 (the position indicated by the two-dot chain line in the figure), and the wheel 7 Can be prevented from rolling with respect to the rails 5 and 6, and when traveling, the brake rod 28 d is lifted by pushing down the handle portion 28 e to move away from the ground or the rails 5 and 6 (positions indicated by solid lines in the figure). The wheel 7 is made rollable by releasing the engagement. The travel stopper 28 may be attached to any position as long as the travel stopper 28 can engage with the ground or the rails 5 and 6 to prevent the wheels 7 from rolling. For example, it can also be attached to a horizontal member located at an intermediate portion in the traveling direction of the pair of traveling devices 20 that support the support legs 109 or 110.

  And in the traveling apparatus 20 of a present Example, the seismic isolation structure 21 is each incorporated in the intermediate | middle part equalizer beams 25a and 25b (refer FIG. 2). FIG. 3 shows an enlarged portion of the traveling device 20 including the seismic isolation structure 21 incorporated in the intermediate equalizer beam 25a. As shown here, the intermediate equalizer beam 25a passes through the rocker pin 24. The upper member 29 is attached to the upper equalizer beam 23 so as to be swingable back and forth, and the lower member 30 supports the upper member 29 from below.

  As shown in FIG. 4, the divided upper member 29 and lower member 30 face each other on the horizontal facing surfaces 31, 31, and the both ends of the facing surface 31 of the upper member 29 on the outer sides in the width direction are parallel to the traveling direction. Tilt pins 32 and 32 are arranged in a different direction (perpendicular to the paper surface) with a width L therebetween. Tilt grooves 33 and 33 are arranged at positions corresponding to the tilt pins 32 and 32 on both outer sides in the width direction of the facing surface 31 of the lower member 30 so as to be fitted to the tilt pins 32 and 32, respectively. A vertical load can be transmitted between the tilt pins 32 and 32 and the tilt grooves 33 and 33. When an earthquake occurs, the lower member 30 tilts with respect to the upper member 29 about one of the pair of tilting pins 32 and 32 according to the direction and magnitude of the excitation force A in the left-right direction. Thus, the lower structure including the lower member 30 of the traveling device 20 is allowed to be displaced from the original position in the left-right direction with respect to the upper structure including the upper member 29. (See FIG. 7 and will be described in detail later). In this embodiment, the upper member 29 is provided with the tilting pins 32 and 32, and the lower member 30 is provided with the tilting grooves 33 and 33. Conversely, the upper member 29 is provided with the tilting grooves 33 and 33. The lower member 30 may be provided with tilt pins 32, 32. Further, the tilting pin 32 is provided on one end side in the width direction of the upper member 29, the tilting groove 33 is provided on the other end side, the tilting groove 33 is provided on one end side in the width direction of the lower member 30, and the tilting pin 32 is provided on the other end side. It can also be. In any case, it is only necessary that the lower member 30 can be tilted with respect to the upper member 29 around one of the pair of tilt pins 32 and 32.

  Further, the seismic isolation structure 21 is provided with a stopper mechanism 34 for restricting the tilting of the lower member 30 with respect to the upper member 29. In the case of the present embodiment, as shown in FIG. 4, the stopper mechanism 34 includes a pair of projecting portions projecting downward from the lower surface of the upper equalizer beam 23 to which the upper member 29 is attached toward both sides in the width direction of the lower member 30. It is comprised as 34a, 34a. When the earthquake occurs and the lower member 30 tilts in the width direction with respect to the upper member 29, the protrusions 34a and 34a come into contact with the lower member 30 at a position where the inclination reaches a predetermined angle, and the tilt is further increased. The size is restricted so as not to increase (see FIG. 7B, which will be described in detail later). In this way, the stopper mechanism 34 can limit the angle within a range in which the lower member 30 can be automatically returned to the original position by the restoring force due to the load while allowing the tilting with respect to the upper member 29 of the lower member 30. It has become.

  Furthermore, the seismic isolation structure 21 of the present embodiment includes a restraining mechanism 35 for preventing the vertical displacement of the upper member 29 relative to the lower member 30. As shown in FIGS. 3 and 5, one set of the restraining mechanisms 35 is provided on the outer sides of both ends in the front-rear direction of the opposing surfaces 31, 31. The pair of restraining mechanisms 35 has a width as shown in FIG. A pair of links 35a and 35b installed in parallel to the direction are provided.

  One link 35a constituting one set of restraining mechanism 35 has a length substantially equal to the width L, and both ends are centered on link pins 35c and 35d installed coaxially with the tilting pins 32 and 32, respectively. Each is supported rotatably. The other link 35b has a length substantially equal to the width L, and is supported rotatably at both ends around link pins 35e and 35f installed coaxially with the tilt pins 32 and 32, respectively. As shown in FIGS. 5 and 6, the link pin 35c that supports one end (left side in FIG. 6) of the link 35a is sandwiched between a pair of flanges 35g and 35g protruding from the upper member 29, and the link 35a The link pin 35d that supports the other end (right side in FIG. 6) is sandwiched between a pair of flanges 35h and 35h protruding from the lower member 30. Further, the link pin 35e that supports one end (left side in FIG. 6) of the link 35b is sandwiched between a pair of flanges 35i and 35i protruding from the lower member 30, and the other end (right side in FIG. 6) of the link 35b. ) Is supported by a pair of flanges 35j and 35j protruding from the upper member 29. That is, one end of the link 35 a is attached to the upper member 29, the other end is attached to the lower member 30, and one end of the link 35 b is attached to the lower member 30. The other end is attached to the upper member 29. In addition, as for the positional relationship in the restraint mechanism 35 of link 35a, 35b, any may be located ahead or back. Of the two links installed in parallel in the width direction, one end of one link is connected to the upper member 29, the other end is connected to the lower member 30, and one end of the other link. It is only necessary that the part is connected to the lower member 30 and the other end is connected to the upper member 29.

  FIG. 3 shows the seismic isolation structure 21 of the traveling device 20 incorporated in the intermediate equalizer beam 25a. However, as described above, the intermediate equalizer beam 25b also has the same seismic isolation structure 21. In the case of this embodiment, two sets of four traveling devices 20 that support the support legs 109 and 110 at the four corners are provided, and a total of eight seismic isolation structures 21 are provided for one rail-type traveling machine 100. Incorporated.

  Next, the operation of this embodiment will be described.

  First, the case where the horizontal excitation force A by an earthquake is applied to the rail type traveling machine 100 in the width direction will be described. In the stationary state, as shown in FIG. 7A, the upper member 29 and the lower member 30 of the intermediate equalizer beam 25 a constituting the seismic isolation structure 21 are vertically applied from the upper structure including the upper member 29. , The tilting pins 32, 32 provided on both sides in the width direction of the opposing surfaces 31, 31 are pressed upward and downward. In this state, the load F is distributed and transmitted as the component forces F ′ and F ′ of the load F to both the tilt pins 32 and 32, and the upper member 29 and the lower member 29 are transmitted by the component forces F ′ and F ′ of the load F. The members 30 are constrained so as not to be displaced in the width direction. When the horizontal excitation force A is applied here, the upper member 29 and the lower member 30 are not displaced from each other if the excitation force A is sufficiently smaller than the load F.

  However, when an excitation force A having a magnitude exceeding a predetermined threshold value a with respect to the load F is applied in the width direction, the lower member 30 has one tilt pin 32 as a fulcrum as shown in FIG. Tilt is started in the width direction with respect to the member 29. Here, a case where a horizontal excitation force A having a magnitude exceeding the threshold value a is applied in the right direction in the figure is illustrated, and in this case, as the rails 5 and 6 move to the right side in the figure, the vehicle travels. The lower structure including the lower member 30 of the device 20 has a contact point between the wheel 7 and the rails 5 and 6 as a lower fulcrum, and a right tilting pin 32 in the drawing as an upper fulcrum. Displaces to the right in the figure while tilting. Contrary to the example illustrated in FIG. 7B, when a horizontal excitation force A having a magnitude exceeding the threshold value a with respect to the load F acts in the left direction in the figure, the above is symmetrical. The lower structure including the lower member 30 of the traveling device 20 has a contact point between the wheel 7 and the rails 5 and 6 as a lower fulcrum, and a tilt pin 32 on the left side in the figure as an upper fulcrum. Displaces to the left in the figure while tilting. In this way, the lower structure including the lower member 30 absorbs the excitation force A by the movement of tilting to the left and right with respect to the upper structure including the upper member 29, and the vibration in the width direction is isolated. At this time, as shown in FIG. 7B, the load F is applied to the tilt pin 32 on the side forming the upper fulcrum as a load F ′ having the same magnitude as the load F, and includes the upper member 29. This structure is supported by only one tilt pin 32.

Here, the threshold value a of the excitation force A at which the lower member 30 starts to tilt with respect to the upper member 29 is the vertical load F and the vertical direction between the tilt pins 32 and 32 and the rails 5 and 6. The distance (height) h and the distance (width) L between the tilting pins 32 and 32 that serve as fulcrums during tilting are determined. Specifically, the magnitude of the threshold value a of the excitation force A with respect to the load F is proportional to the magnitude of the width L with respect to the height h.
L / 2: h = a: F
It can be expressed by the relational expression For example, when the ratio of the height h and the half of the width L is 1: 0.2, the threshold a is 0.2 times the load F, that is, the occurrence of an earthquake When the acceleration of a magnitude exceeding 0.2 G is applied to the rail-type traveling machine 100 in the width direction, the seismic isolation structure 21 operates and the lower member 30 starts to tilt with respect to the upper member 29. become.

  The size of the threshold value a with respect to the load F is determined by the arrangement of the tilt pins 32 and 32 as described above, and increases as the width L increases with respect to the height h. That is, the threshold value a can be increased as the tilting pins 32 and 32 are spaced apart from each other in the width direction, but the distance (width) L between the tilting pins 32 and 32 is greater than or equal to the width of the intermediate equalizer beam 25a itself. It cannot be taken big. When the seismic isolation structure 21 as in the present embodiment is applied to an actual traveling device, it has been confirmed that the threshold value a for starting tilting can be increased to about 0.2 times the load F. It goes without saying that it can be made larger depending on the configuration of the traveling device.

  When the lower member 30 starts to tilt, the rails 5 and 6 that form the lower fulcrum of the tilt move so as to approach the horizontal direction with respect to the tilt pin 32 that forms the upper fulcrum. When the tilt is further deepened, the rails 5 and 6 forming the lower fulcrum tend to move outward in the width direction beyond the position of the tilt pin 32 forming the upper fulcrum.

  At this time, while the rails 5 and 6 are positioned on the inner side in the width direction than the tilt pins 32 and 32, the vertical load F ′ applied to the tilt pin 32 forming the upper fulcrum is the seismic isolation structure 21. However, when the rails 5 and 6 reach the outer side in the width direction than the tilting pin 32 forming the upper fulcrum as a result of the increased displacement in the width direction, F 'acts in a direction to lay down the lower structure including the lower member 30, and each member constituting the seismic isolation structure 21 cannot be returned to the original position. In the seismic isolation structure 21 of the present embodiment, the above-described stopper mechanism 34 is provided to prevent such a situation.

  The stopper mechanism 34 of the present embodiment is configured as a pair of projecting portions 34 a and 34 a that project downward from the lower surface of the upper equalizer beam 23 toward both sides in the width direction of the lower member 30 as described above. When the lower member 30 deepens the inclination by the action of the excitation force A, the rails 5 and 6 are placed at positions outside the tilting pin 32 forming the upper fulcrum as shown in FIG. 7B. Before reaching the lower member 30, the lower member 30 comes into contact with one of the protruding portions 34a, and further inclination is prevented. Thereby, the tilting of the lower member 30 is limited to a range in which the seismic isolation structure 21 can automatically return to the original position by the load F ′, and the lower structure including the lower member 30 will fall down. It comes to prevent it.

  The configuration of the stopper mechanism 34 is not limited to the above example. For example, the protruding portion 34a protrudes from the lower surface of the upper equalizer beam 23 constituting a part of the structure on the upper member 29 side to the structure on the lower member 30 side. It may be provided so as to project from the structure on the side toward the structure on the upper member 29 side.

  Further, as shown in FIG. 8A, the stopper mechanism 34 may include a link 34 b having one end connected to the upper member 29 and the other end connected to the lower member 30. In the case of the stopper mechanism 34 shown in FIG. 8A, a pair of width direction one side (left side in the figure) and the other side (right side in the figure) along the opposing surfaces 31, 31 of the upper member 29 and the lower member 30. Links 34b and 34b are provided. An end of one side (left side in the figure) of one side (left side in the figure) of the one side (left side in the figure) is an upper member centered on a pin 34c having an axis in the front-rear direction (perpendicular to the paper surface) provided in the upper member 29. 29 is pivotally connected to 29. A long hole 34d having a length in the width direction is opened at the end of the other side (right side in the figure) of the link 34b on one side (left side in the figure). A pin 34e having a longitudinal axis provided is inserted. The pin 34e rotatably supports the link 34b through the elongated hole 34d, and can move in the elongated hole 34d along the shape of the elongated hole 34d. The link 34b on the other side (right side in the figure) is configured symmetrically with the link 34b on one side (left side in the figure), and the lower member 30 is inserted into the elongated hole 34d opened at the end of one side (left side in the figure). The other end (right side in the figure) is pivotally connected to the upper member 29 around the pin 34c provided on the upper member 29. Here, the case where the end on the lower member 30 side is connected to the lower member 30 via the elongated hole 34d is illustrated, but the end on the upper member 29 side is connected to the upper member 29 via the elongated hole 34d. You may make it connect. Moreover, the long hole 34d may be provided at both ends of the link 34b, and the link 34b may be connected to both the upper member 29 and the lower member 30 through the long hole 34d. Further, pins may be provided at both ends of the link 34b, and long holes may be provided on the upper member 29 or the lower member 30 side.

  In the case of the stopper mechanism 34 shown in FIG. 8A, when the lower member 30 starts to tilt with respect to the upper member 29 by the excitation force A in the width direction, as shown in FIG. Rotates around the pins 34c and 34c provided on the upper member 29, and the pins 34e and 34e provided on the lower member 30 move relatively along the elongated holes 34d and 34d, respectively. By this movement, the tilting of the lower member 30 with respect to the upper member 29 is allowed while the tilt is relatively shallow. However, when the inclination reaches a certain angle, as shown in FIG. 8B, one pin 34e comes into contact with the end of the elongated hole 34d and cannot move any further, and the lower member 30 is not moved relative to the upper member 29. It cannot be tilted any more. The angle at this time can be adjusted by changing the length of the long hole 34d, and the tilting of the lower member 30 is limited to a range in which the seismic isolation structure 21 can automatically return to the original position by the load F ′. can do. As described above, even with the stopper mechanism 34 shown in FIG. 8, the rails 5 and 6 reach the position on the outer side in the width direction relative to the tilting pin 32, and the lower structure including the lower member 30 falls down. This can be prevented beforehand. In addition, as the stopper mechanism 34, various mechanisms that can limit the tilting of the lower member 30 can be employed.

  The restraining mechanism 35 does not limit the tilting of the lower member 30 with respect to the upper member 29 as described above. FIG. 9 explains the operation of such a restraining mechanism 35. First, when the lower member 30 is displaced to the right in the drawing with respect to the upper member 29 as shown in FIG. 7B, the upper member 29 and the lower member 30 remain in contact with each other at the right tilt pin 32. On the left side, they are separated from each other. At this time, as shown in FIG. 9A, the link 35a having the left end in the figure attached to the upper member 29 follows the upper member 29, and the left end in the figure is attached to the lower member 30. The link 35b that follows the lower member 30 follows. When the lower member 30 is displaced with respect to the upper member 29 in the direction opposite to that shown in FIG. 7B (the left side in FIG. 7), the upper member 29 and the lower member 30 are moved to the left tilt pin 32. In this case, as shown in FIG. 9B, the link 35a attached to the lower member 30 at the right end in the figure follows the lower member 30, as shown in FIG. The link 35 b attached to the upper member 29 at the right end in the figure follows the upper member 29. That is, the links 35 a and 35 b constituting the restraining mechanism 35 operate so as to open one end of each other in accordance with the direction of tilting in the width direction, so that the lower member 30 is tilted with respect to the upper member 29. As long as it tilts in the width direction using as a fulcrum, the tilting is not limited.

  Thus, when an excitation force A exceeding the threshold value a in the width direction is applied to the rail-type traveling machine 100 by an earthquake, the lower structure including the lower member 30 tilts with respect to the upper member 29. The pin 32 is tilted in the left-right direction with the fulcrum as a fulcrum, and the excitation force A in the width direction can be absorbed by this movement.

  Next, a case where a horizontal excitation force due to an earthquake is applied to the rail traveling machine 100 in the traveling direction will be described. In this case, the seismic isolation structure 21 does not incorporate a structure for isolating the shaking in the traveling direction, and the seismic isolation structure 21 does not absorb the excitation force in the traveling direction. However, if the wheel 7 is in a state where it can roll or slide with respect to the rails 5 and 6, the swing in the traveling direction causes the wheel 7 to roll or slide and the rail-type traveling machine 100 is railed against the ground. It is isolated by moving along 5 and 6.

  However, when the brake rod 28d of the travel stopper 28 (see FIG. 3) is lowered and the wheels 7 cannot roll, the lower structure including the lower member 30 of the travel device 20 is horizontal with respect to the ground. Restrained by When an earthquake occurs in this state and an excitation force is applied in the traveling direction, the lower structure including the lower member 30 is displaced in the traveling direction with respect to the entire upper structure including the upper member 29. As a result, the entire upper structure including the upper member 29 may be displaced so as to float relative to the lower structure including the lower member 30. Such displacement cannot be limited by the stopper mechanism 34 as described above. When the upper structure including the upper member 29 is lifted with respect to the lower structure including the lower member 30 and is displaced in the traveling direction, it can be automatically returned to the original position. Can not.

  In the case of the seismic isolation structure 21 of the present embodiment, the restraining mechanism 35 prevents the vertical movement such that the upper member 29 is lifted with respect to the lower member 30. That is, when the link 35a is viewed, as shown in FIG. 10 (a), when the upper member 29 and the lower member 30 move in the vertical direction with respect to each other and are separated from each other in the entire width direction, the length of the link 35a is constant. Therefore, the flange 35g on the upper member 29 side to which one end (left side in the figure) of the link 35a is attached and the flange on the lower member 30 side to which the other end (right side in the figure) of the link 35a is attached. 35h must approach each other in the width direction. That is, the lower member 30 is displaced to the left side in the drawing with respect to the upper member 29. On the other hand, when the link 35b is viewed, as shown in FIG. 10B, when the upper member 29 and the lower member 30 move in the vertical direction with respect to each other and try to be separated in the entire width direction, the length of the link 35b is constant. Therefore, the flange 35i on the lower member 30 side to which one end of the link 35b is attached and the flange 35j on the upper member 29 side to which the other end of the link 35b is attached also approach each other in the width direction. I have to. That is, the lower member 30 is displaced to the right side in the drawing with respect to the upper member 29. However, the approach in the width direction of the flange 35g and the flange 35h (the movement shown in FIG. 10A) and the approach in the width direction of the flange 35i and the flange 35j (the movement shown in FIG. 10B) can occur simultaneously. Absent. This is because the leftward displacement of the lower member 30 relative to the upper member 29 and the rightward displacement of the lower member 30 relative to the upper member 29 are not compatible. Thus, the restraining mechanism 35 allows the lower member 30 to move in the width direction around the tilt pin 32 with respect to the upper member 29, while allowing the upper member 29 to move upward relative to the lower member 30. Works to forbid.

  Then, according to the seismic isolation structure 21 of the present embodiment as described above, the seismic isolation effect sufficient for the swing in the width direction of the rail-type traveling machine 100 is sufficient if the earthquake is up to a medium scale of about level 1 ground motion. The rail type traveling machine 100 can be prevented from being damaged or collapsed.

  As described above, in this embodiment, the traveling device 20 that includes the wheels 7 that can roll with respect to the rails 5 and 6 and supports the support legs 109 and 110 of the rail-type traveling machine 100 is provided at least at one location. It is divided into an upper structure including the member 29 and a lower structure including the lower member 30, and the upper member 29 and the lower member 30 are arranged on both sides in the direction orthogonal to the traveling direction of the opposing surfaces 31 and 31 facing each other. Since the pair of tilting pins 32 and 32 extending in the traveling direction along the direction are arranged, it is not necessary to significantly change the structure of the rail-type traveling machine when the seismic isolation structure 21 is incorporated. However, it can be easily incorporated, and can effectively quake the shaking in the width direction due to the middle-scale earthquake.

  In this embodiment, since the stopper mechanism 34 for limiting the tilting range of the lower member 30 with respect to the upper member 29 is provided, the rail caused by the displacement in the width direction of the lower member 30 with respect to the upper member 29 becomes too large. The collapse of the traveling machine 100 can be prevented.

  Further, in the present embodiment, the stopper mechanism 34 has a protruding portion 34 a that projects from one of the upper structure including the upper member 29 and the lower structure including the lower member 30 toward the other width direction outside. , 34a, and in this way, the displacement in the width direction of the lower structure including the lower member 30 with respect to the upper structure including the upper member 29 is limited with a simple structure. be able to.

  Further, in the present embodiment, the stopper mechanism 34 includes links 34b whose both ends are connected to the upper member 29 and the lower member 30 so as to be rotatable about a horizontal axis, respectively. At least one of them can be configured to be connected to the upper member 29 or the lower member 30 through the elongated hole 34d. With this configuration, the upper structure including the upper member 29 can be easily configured. The displacement in the width direction of the lower structure including the lower member 30 can be limited.

  Further, in the present embodiment, a restraining mechanism 35 including a pair of links 35a and 35b extending in the width direction is provided, and one link 35a of the pair of links 35a and 35b tilts an end portion on one side. A link pin 35c provided coaxially with one of the pins 32, 32 is pivotally connected to the upper member 29, and the other end is provided coaxially with the other of the tilting pins 32, 32. The other link 35b of the pair of links 35a and 35b is coaxial with one of the tilt pins 32 and 32, with the link pin 35d being pivotally connected to the lower member 30. The link pin 35e provided at the center is pivotally connected to the lower member 30, and the other end is located above the link pin 35f provided coaxially with the other of the tilting pins 32, 32. For member 29 Because it is movably coupled, it is possible to prevent the upper structure including the upper member 29 is displaced as lifted relative to the lower structure comprising a lower member 30.

  In the present embodiment, the traveling device 20 includes at least one equalizer beam 23, 25a, 25b that is swingably attached to the upper member by rocker pins 22, 24, 26 having axes orthogonal to the traveling direction. 27a, 27b, 27c, 27d, and at least one of the equalizer beams 23, 25a, 25b, 27a, 27b, 27c, 27d is connected to the upper member 29 and the lower member 30. Since the structure is divided, a reliable seismic isolation effect can be obtained by the small and simple seismic isolation structure 21.

  Therefore, according to the present embodiment, it can be easily incorporated into an existing rail type traveling machine with a small and simple configuration.

  In addition, the seismic isolation structure of the rail-type traveling machine of the present invention is not limited to the above-described embodiment, and various changes can be made without departing from the scope of the present invention.

5 rail (sea rail)
6 rail (land side rail)
7 wheels 9 support legs (sea side support legs)
10 Support legs (Land support legs)
20 Traveling Equipment 21 Seismic Isolation Structure 22 Rocker Pin 23 Equalizer Beam (Upper Equalizer Beam)
24 Rocker pin 25a Equalizer beam (middle equalizer beam)
25b Equalizer beam (middle equalizer beam)
26 Rocker pin 27a Equalizer beam (lower equalizer beam)
27b Equalizer beam (lower equalizer beam)
27c Equalizer beam (lower equalizer beam)
27d Equalizer beam (lower equalizer beam)
29 upper member 30 lower member 31 opposing surface 32 tilting pin 34 stopper mechanism 34a protrusion 34b link 34d long hole 35 restraining mechanism 35a link 35b link 35c link pin 35d link pin 35e link pin 35f link pin 100 rail type traveling machine 109 support leg (Sea side support leg)
110 Support leg (Land side support leg)

Claims (5)

A traveling device having wheels that can roll with respect to a rail and supporting a support leg of a rail-type traveling machine is divided into an upper structure including an upper member and a lower structure including a lower member in at least one place. And
A pair of tilting pins extending in the traveling direction along both sides in the direction orthogonal to the traveling direction of the opposing surfaces of the upper member and the lower member facing each other ;
It further comprises a restraint mechanism comprising a pair of links extending in the width direction,
One of the pair of links is rotatably connected to the upper member with a link pin provided coaxially with one of the tilting pins, and an end on the other side. Is pivotally connected to the lower member about a link pin provided coaxially with the other of the tilt pins,
The other of the pair of links is pivotally connected to the lower member with a link pin provided coaxially with one of the tilting pins, and the other end of the pair of links. A seismic isolation structure for a rail-type traveling machine, characterized in that it is pivotally connected to the upper member around a link pin provided coaxially with the other of the tilting pins .   The seismic isolation structure for a rail-type traveling machine according to claim 1, further comprising a stopper mechanism that limits a range of tilting of the lower member relative to the upper member.   The stopper mechanism includes a protruding portion that protrudes from one of the upper structure including the upper member and the lower structure including the lower member toward the outside in the other width direction. The seismic isolation structure of the rail-type traveling machine according to claim 2.   The stopper mechanism includes a link having both ends rotatably connected to the upper member and the lower member about a horizontal axis, and at least one of the both ends of the link is provided with an elongated hole. The seismic isolation structure for a rail type traveling machine according to claim 2, wherein the base member is connected to the upper member or the lower member. The traveling device has at least one equalizer beam swingably attached to an upper member by a rocker pin having an axis perpendicular to the traveling direction, and at least one of the equalizer beams is It divided | segmented into the member and the said lower member, The seismic isolation structure of the rail-type traveling machine as described in any one of Claims 1-4 characterized by the above-mentioned.

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