JP3354921B2 - Seismic isolation type escape prevention device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic isolation type escape prevention device suitable for use in preventing escape of work machines such as container cranes and bridge cranes.

[0002]

2. Description of the Related Art FIG. 12 is a side view of a crane provided with a conventional escape prevention device around a leg. The crane leg is provided with two saddles 51 below the sill beam 50 before and after (left and right on the paper), and each saddle 51 has a traveling device 5.
2 are connected by a horizontal axis 53 in a direction crossing the sill beam 50.

The traveling device 52 includes, as an example, a traveling track 57 with wheels 56 provided below two upper and lower balance beams 54 and 55 and two lower balance beams 55.
And travels on the rail 58 by driving the wheels 56. The superstructure of the crane, including the sill beam 50, is substantially movable relative to the travel device 52, with only a small movement in the travel and transverse directions within the normal allowable clearance of the connection including the horizontal axis 53. It is configured integrally with the device 52. Therefore, when the rail 58 is deformed vertically or horizontally due to earthquake vibration or the like, when the four sets of traveling devices 52 traveling along the rail 58 follow,
The upper structure of the crane will bend and deform. If the amount of deformation of the rail 58 is large, the traveling device 52 may not be able to follow the vehicle and may lose its wheel, or the traveling device 52 and the saddle 51 may be damaged, causing the crane to fall.

Conventionally, as shown in FIG. 12, a stopper 61 and a rail clamp 62 are provided on a support portion 60 projecting downward from an intermediate portion of a sill beam 50 to prevent the crane from escaping and lifting. A stopper 63 for preventing floating is provided below the 51 portion. As shown in FIG. 13, the stopper 61 is embedded at the lower end of the support part 60 and is vertically moved by a handle 64 or the like, and is embedded on the side of the rail 58 so as to fit with the tip of the stopper rod 65. It is composed of a fixed movement limiting metal fitting 66 in the running direction.

[0005] As shown in FIG.
A cylinder 68 on a carriage 67 connected to the support portion 60
A clamp 69 is provided which clamps and connects both side surfaces of the rail 58 at the distal end driven to open and close. FIG.
As shown in the figure, the stopper 63 is connected to the horizontal shaft 5 of the saddle 51.
3. A support portion 70 supported outside the balance beam 54
A stopper rod 72 which moves up and down by a handle or the like at both sides of the rail 58 in the lower cross beam 71, and a movement restricting bracket 73 fixedly installed on the base surface so as to loosely fit with the lower end of the stopper rod 72. In addition, the relative lateral movement amount between the traveling device 52 and the sill beam 50 is limited for each traveling device 52.

Although these methods have an effect of preventing derailing and damage to a small-scale earthquake vibration, in the case of a large-scale earthquake, they are in a fixed state and cannot expect a seismic isolation effect. Therefore, a method of applying a laminated rubber or a hydraulic damper, which is being used as a horizontal seismic isolation mechanism between a building and a foundation in a high-rise building or the like, for seismic isolation between the traveling device 52 of the crane and the sill beam 50. However, in this case, it is necessary to allow the horizontal movement between the crane upper structures with respect to the traveling device 52 to a certain limit only when a large earthquake occurs. However, in the above-mentioned conventional escape prevention devices (stoppers 61, 63), the movement restricting fittings 66, 7 to which the stopper rods 65, 72 fit respectively.
3, the horizontal movement between the crane upper structures is hindered, and the seismic isolation mechanism may not be useful.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has a construction in which a work machine main body is supported on a traveling device via a seismic isolation mechanism and horizontally crosses rails. In the event of lateral swaying, the function of the seismic isolation mechanism can be effectively exerted without disturbing the function of the seismic isolation mechanism. The purpose is to provide the device.

[0008]

The present invention employs the following means in order to solve the above-mentioned problems. In other words, the seismic isolation type escape prevention device according to claim 1 is a working machine having a traveling device that travels along a rail, and a working machine body supported on the traveling device via the first seismic isolation mechanism. A seismic isolation type escape prevention device that prevents runaway of the work machine and allows the work machine main body to sway in a horizontal direction crossing the rail horizontally, provided on the work machine main body, A vertically movable stopper rod which is inserted into and withdrawn from a receiver provided on a base surface of the work machine, and which is provided between the stopper rod and the work machine body, and which swings the work machine body with respect to the stopper rod. And at least the second seismic isolation means that permits the lateral direction.

According to the seismic isolation type escape prevention device of the first aspect, when the operation of the work machine is stopped or an earthquake occurs, the work machine is stopped at a predetermined stop position, and the stopper rod is further lowered. The work machine is prevented from running away by being inserted into the receiving money. In this state, for example, when the strong horizontal vibration due to the earthquake is applied, the working machine body can swing laterally with respect to the traveling device due to the presence of the first seismic isolation mechanism. The interposition of the second seismic isolation mechanism allows the stopper rod to swing laterally with respect to the stopper rod. In this way, the work machine body swings laterally with respect to both the traveling device and the stopper rod, so that the seismic force applied to the work machine body is reduced.

According to a second aspect of the present invention, there is provided a seismic isolation type escape prevention device according to the first aspect, wherein the second seismic isolation means is fixed to a lower portion of the work machine main body. A horizontal axis having the horizontal direction as the axis, and a stopper rod holder that holds the stopper rod so as to be able to move up and down and that is slidably supported along the horizontal axis. It is characterized by having.

According to the seismic isolation type escape prevention device according to the second aspect, the work machine is stopped at a predetermined stop position, and the stopper rod is further lowered to be inserted into the receiving member.
Escape of the work machine is prevented. In this state, when a strong horizontal vibration due to an earthquake is applied to the working machine in the lateral direction, the horizontal axis of the second seismic isolation means moves relative to the stopper rod holder fixed to the rail base surface. Move in the direction of the center (lateral direction). Therefore, the work machine body swings in the lateral direction integrally with the horizontal shaft. In this way, the work machine body swings laterally with respect to both the traveling device and the stopper rod, so that the seismic force applied to the work machine body is reduced.

According to a third aspect of the present invention, there is provided the seismic isolation type escape prevention device according to the second aspect, wherein a shear pin having a predetermined shear strength is provided between the support member and the stopper rod holder. Characterized by being joined by

According to the seismic isolation type escape prevention device of the third aspect, the lateral relative movement of the support member with respect to the stopper rod holding member by the shear strength of the shear pin until the strength of the roll reaches a predetermined strength. Is blocked,
The second seismic isolation mechanism is maintained in a stopped state. On the other hand, when the strength of the roll reaches a predetermined strength or more, the shear pin is sheared, and the support member is allowed to swing in the lateral direction with respect to the stopper rod holder. Therefore, the second seismic isolation mechanism is automatically activated upon sensing the strength of the roll.

According to a fourth aspect of the present invention, there is provided the seismic isolation type escape prevention device according to the first aspect, wherein the second seismic isolation means includes a stopper rod integrally provided with the stopper rod. An elevating block held at a lower portion of the work machine main body so as to be capable of elevating operation, and at least one pair of vertical plate-like link members for connecting the elevating block and the stopper rod holding member in parallel. It is characterized by the following.

According to the seismic isolation type escape prevention device of the fourth aspect, the work machine is stopped at a predetermined stop position, and the stopper rod is further lowered to be inserted into the receiving member.
Escape of the work machine is prevented. In this state, when a strong horizontal vibration due to, for example, an earthquake is applied to the work machine in the lateral direction, the second seismic isolation means is connected to the stopper rod holder fixed to the rail base surface by the parallel link. The lifting block moves in the horizontal direction. Therefore, the work machine main body swings in the lateral direction integrally with the lifting block. In this way, the work machine body swings laterally with respect to both the traveling device and the stopper rod, so that the seismic force applied to the work machine body is reduced.

According to a fifth aspect of the present invention, there is provided the seismic isolation type escape prevention device according to the fourth aspect, wherein a shear pin having a predetermined shear strength is provided between the lifting block and the stopper rod holder. Are connected by

According to the seismic isolation type escape prevention device of the fifth aspect, the relative movement of the lifting block in the horizontal direction with respect to the stopper rod holding member by the shear strength of the shear pin until the strength of the rolling reaches the predetermined strength. Therefore, the second seismic isolation mechanism is maintained in a stopped state. On the other hand, if the strength of the roll reaches a predetermined strength or more, the shear pin is sheared, and the lift block can be allowed to rock in the horizontal direction with respect to the stopper rod holder. Therefore, by detecting the strength of the roll, the second
The seismic isolation mechanism operates.

According to a sixth aspect of the present invention, there is provided the seismic isolation type runaway prevention device according to the first aspect, wherein the second seismic isolation means is provided in the lateral direction with respect to a lower portion of the work machine main body. An intermediate link member pivotally coupled to a pin, a support block pivotally pivotally coupled to the lower portion of the intermediate link member, and a stopper rod fixed to the support block. And a stopper rod holding member that is capable of moving up and down.

According to the seismic isolation type escape prevention device of the sixth aspect, the work machine is stopped at the predetermined stop position, and the stopper rod is further lowered to be inserted into the receiving member.
Escape of the work machine is prevented. In this state, for example, when strong horizontal vibration due to an earthquake is applied to the working machine in the lateral direction, the intermediate link member is laterally moved around the stopper rod holder fixed to the rail base surface in the second seismic isolation means. Rocks in the direction. Therefore, the work machine body swings in the lateral direction with the swing of the intermediate link member. In this way, the work machine body swings laterally with respect to both the traveling device and the stopper rod, so that the seismic force applied to the work machine body is reduced.

According to a seventh aspect of the present invention, there is provided the seismic isolation type escape prevention device according to the sixth aspect, wherein the work machine body and the intermediate link member and the intermediate link member and the support block are provided. Are connected by a shear pin having a predetermined shear strength.

According to the seismic isolation type escape prevention device of the seventh aspect, the swing of the intermediate link member with respect to the stopper rod holding member is performed by the shear strength of the shear pin until the strength of the roll reaches the predetermined strength. Since the swinging of the work machine main body with respect to the intermediate link member is prevented, the second seismic isolation mechanism is maintained in a stopped state. On the other hand, when the strength of the roll reaches a predetermined strength or more, the shear pin is sheared, and the lateral swing of the intermediate link member with respect to the stopper rod holding member and the lateral swing of the work machine body with respect to the intermediate link member. Will be allowed. Therefore, the second seismic isolation mechanism is automatically activated upon sensing the strength of the roll.

According to an eighth aspect of the present invention, there is provided the seismic isolation type escape prevention device according to the first aspect, wherein the second seismic isolation means includes a stopper rod provided with the stopper rod integrally. Body, a lifting / lowering frame for guiding and supporting the stopper rod holding body so as to be slidable in the lateral direction, a vertically supporting and vertically supporting guide housing for accommodating the lifting / lowering frame, and a lower part of the working machine body. And a fixed support frame.

According to the eighth aspect of the present invention, the work machine is stopped at a predetermined stop position, and further, the stopper rod is lowered and inserted into the catch.
Escape of the work machine is prevented. In this state, when a strong horizontal vibration due to, for example, an earthquake is applied to the working machine in a lateral direction, the second seismic isolation means causes the lifting frame and the supporting frame to move against the stopper rod holder fixed to the rail base surface. Moves sideways. Therefore, the work machine main body swings in the lateral direction integrally with the support frame. In this way, the work machine body swings laterally with respect to both the traveling device and the stopper rod, so that the seismic force applied to the work machine body is reduced.

According to a ninth aspect of the present invention, there is provided the seismic isolation type escape prevention device according to the eighth aspect, wherein a shear pin having a predetermined shear strength is provided between the stopper rod holder and the lifting frame. Are connected by

According to the quake-absorbing type escape prevention device of the ninth aspect, until the strength of the roll reaches the predetermined strength, the shearing strength of the shear pin causes the lifting frame and the supporting frame to move in the horizontal direction with respect to the stopper rod holder. Is stopped, the second seismic isolation mechanism is kept stopped. On the other hand, when the strength of the rolling reaches a predetermined strength or more, the shear pin is sheared, and the horizontal movement of the lifting frame and the supporting frame with respect to the stopper rod holder is allowed. Therefore, the second seismic isolation mechanism is automatically activated upon sensing the strength of the roll.

The seismic isolation type escape prevention device according to claim 10 is
The seismic isolation type escape prevention device according to claim 1, wherein the second
A stopper rod holder for supporting the stopper rod in a tiltable manner within a predetermined angle range, an elevating frame for guiding and supporting the stopper rod holder so as to be slidable in the lateral direction. And a support frame fixed to a lower portion of the work machine main body, wherein the support frame is accommodated in the lift frame so as to be vertically movable and supported.

According to the seismic isolation type escape prevention device of the tenth aspect, the work machine is stopped at a predetermined stop position, and further, the stopper rod is lowered and inserted into the receiving metal, so that the work machine can escape. Is prevented. In this state, if a strong horizontal vibration due to an earthquake is applied to the work machine in the lateral direction, the stopper rod fixed to the rail base surface tilts with respect to the stopper rod holder in the second seismic isolation means. The lifting frame and the supporting frame move laterally with respect to the stopper rod holder. Therefore, the work machine main body swings in the lateral direction integrally with the lifting frame and the support frame. In this way, the work machine body swings laterally with respect to both the traveling device and the stopper rod, so that the seismic force applied to the work machine body is reduced.

The seismic isolation type escape prevention device according to claim 11 is
The seismic isolation type escape prevention device according to claim 10, wherein the stopper rod holder and the lifting frame are connected by a shear pin having a predetermined shear strength.

According to the seismic isolation type escape prevention device of the eleventh aspect, the horizontal direction of the lifting frame and the supporting frame with respect to the stopper rod holding member is determined by the shear strength of the shear pin until the strength of the roll reaches the predetermined strength. Is stopped, the second seismic isolation mechanism is kept stopped. On the other hand, when the strength of the rolling reaches a predetermined strength or more, the shear pin is sheared, and the horizontal movement of the lifting frame and the supporting frame with respect to the stopper rod holder is allowed. Therefore, the second seismic isolation mechanism is automatically activated upon sensing the strength of the roll.

[0030]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The seismic isolation type escape prevention device of the present invention
A traveling device 52 that travels along a rail 58 described later, and a seismic isolation mechanism 1 including a spring or a damper on the traveling device 52
A run-away of a seismic isolation type crane (working machine) having a crane main body (working machine main body) supported via 3, 14 (first seismic isolation mechanism) is prevented, and the rail crosses horizontally with the rail 58. This is a seismic isolation type escape prevention device that allows the crane body to roll in the horizontal direction. Each embodiment will be described below with reference to the drawings, but the present invention is limited to these embodiments. Of course not. The first of the following
In the fifth to fifth embodiments, the case where the seismic isolation type escape prevention device of the present invention is applied to a seismic isolation type crane will be described. However, the present invention is not limited thereto, and other operations such as a pneumatic unloader and a continuous unloader may be performed. Of course, a configuration applied to a machine is also possible. The “lateral direction” in each embodiment refers to a horizontal direction orthogonal to the rail 58, and
In the direction perpendicular to the plane of the drawing.

[First Embodiment] FIG. 1 is a side view showing the periphery of a leg of a seismic isolation type crane provided with a seismic isolation type escape prevention device of the present embodiment, and FIG. 2 is II in FIG. FIG. 3 is an enlarged side view of a portion, and FIG. 3 is a view taken along arrows III to III in FIG. As shown in FIG. 1, the sill beam 50 of the crane and each traveling device 5
Between the two eccentrics, one end of the intermediate lever 10 is supported on the central upper surface of the upper balance beam 54 via the bearing 11, and the other end of the intermediate lever 10 is supported on the lower surface of the sill beam 50 via the bearing 12. It has a support structure.

The connecting portions of the bearings 11 and 12 on the side of the intermediate lever 10 and on the side of the traveling device 52 and on the side of the sill beam 50 are respectively seismically isolated such as shear pins or hydraulic dampers (not shown) cut off by the impact force at the time of the occurrence of the earthquake. Mechanism 1
3 and 14, during normal operation of the crane, the sill beam 50 is moved along with each traveling device 52 to the rail 58.
It is to be kept in the upper position. 13, 14
When the shear pin is cut by the seismic vibration and the intermediate lever 10 rotates horizontally, for example, a spring or a damper that restores or suppresses the horizontal rotation at a constant rotation angle corresponding to a lateral movement distance of about ± 300 mm, etc. (First seismic isolation mechanism).

A rail clamp truck 62 for preventing runaway when the crane stops is provided in connection with the traveling truck 57 with wheels. In addition, this seismic isolation crane
In order not to hinder the lateral movement of the sill beam 50 due to the escape of the crane and the horizontal rotation of the intermediate lever 10 when an earthquake occurs,
A seismic isolation type escape prevention device 100 is provided. The seismic isolation type escape prevention device 100 is roughly composed of a support portion 16 protruding downward from an intermediate portion of the sill beam 50 and a stopper device 15 provided at a lower end of the support portion 16.

As shown in FIGS. 2 and 3, the stopper device 1
5 is a cross beam 16a that straddles the rail 58 below the support portion 16, a pair of vertical plates 17 (stopper members) fixed to both side edges of the cross beam 16a, and fixedly supported between these vertical plates 17. Upper and lower two horizontal horizontal shafts 18, and a horizontally long main body frame 2 supported by sliding bearings 19 slidably in the axial direction with respect to the horizontal shafts 18.
0 parts are provided. A pair of stopper rods 21 are provided movably up and down at two symmetrical positions with respect to the center position of the horizontally long main body frame 20. A common shaft 22 that penetrates the upper ends of the stopper rods 21 so as to be slidable in the lateral direction is attached.
The shaft 22 is supported by a lever 24 having a manual handle 23. The manual handle 23 is turned up and down with both sides of the cross beam 16a as support points. The gap between both side surfaces of the main body frame 20 and the inner surface of the vertical plate 17 also serving as a stopper is configured to have a distance dimension required for seismic isolation, for example, about ± 300 mm.

The seismic isolation type escape prevention device is characterized in that the support member and the stopper rod holder are connected by a shear pin having a predetermined shear strength. Between the main body frame 20 and the cross beam 16a (between the main body frame 20 and the support portion 16), a shear pin 2 having a predetermined shear strength that is broken by an impact force at the time of an earthquake.
It is possible to combine at 0a and use it as a stopper during normal operation. In order to receive the lower end of the stopper rod 21 and limit the lateral movement and the traveling direction movement of the stopper rod 21, a pair of receiving members 25 are embedded and fixed to the base portions on both sides of the rail 58. The gaps between the respective stopper rods 21 and the receiving members 25 are formed so as to limit the movement of the stopper rods 21 to such an extent that the stopper rods 21 do not hinder the movement of the stopper rods 21. These receivers 25 are provided at predetermined stop positions of the crane,
Further, a plurality of other positions can be provided as emergency stop positions.

Therefore, the seismic isolation type escape prevention device 100 of this embodiment is provided on the sill beam 50 on the crane main body (working machine main body) side, and with respect to each of the receivers 25 provided on the base surface of the rail 58. Up and down movable stopper rods 21 to be inserted and withdrawn, respectively, and a seismic isolation mechanism 100A provided between the stopper rods 21 and the crane body to allow the crane body to swing with respect to the stopper rods 21 in the lateral direction. (Second seismic isolation means). The seismic isolation mechanism 100A according to the present embodiment is provided with a pair of horizontal shafts 18 provided integrally with the support portion 16 (support member) fixed to the lower part of the sill beam 50 of the crane main body and having the horizontal axis as the axis. Body frame 2 which holds each stopper rod 21 so as to be able to move up and down and is slidably supported along the axis of the horizontal shaft 18.
0 (stopper rod holder).

This type of crane, as described above,
During normal operation, the connection portions of the bearings 11 and 12 on the intermediate lever 10 side, the traveling device 52 side and the sill beam 50 side are respectively shear pins or other hydraulic dampers (not shown) which are cut off by the impact force at the time of the earthquake. And so on, so that the sill beam 50 can be operated while being held on the rail 58 together with the traveling device 52 by being restrained from rotating. On the other hand, when the operation of the crane is stopped, the crane stops moving to the predetermined rest position, and the rail 58 is sandwiched and connected by the rail clamp 69 (see FIG. 14) of the rail clamp truck 62, so that the crane is mounted on the rail 58. To prevent the crane from escaping. When the crane is to be stopped for a long time, the stopper rod 15 is operated to operate each stopper rod 2.
1 is inserted into each receiving money 25.

When an earthquake occurs and strong horizontal vibration is detected during normal crane operation, the crane operator stops the crane at the nearest emergency stop position, and moves the rail clamp 69 to the rail. To 58,
Further, each stopper rod 21 is operated by operating the stopper device 15.
Is inserted into each of the receivers 25 (the crane that has been out of operation at the time of the earthquake has already been kept in this state). Strong horizontal vibration caused by the earthquake
If the strength of the twelve anti-rotation shear pins is exceeded, the shear pins are cut, the bearings 11 and 12 become rotatable, the intermediate lever 10 is rotated, and the sill beam 50 (the upper structure of the crane) is moved by the traveling device 52. To slide horizontally.

Due to the lateral movement of the sill beam 50,
In the stopper device 15 at the center of the sill beam 50, the shear pin 20a is automatically cut by a strong horizontal impact force due to the earthquake, and the main body frame 20 becomes free to move laterally relative to the cross beam 16a.
1 is coupled to the respective receiving members 25 to restrict the lateral movement, so that each receiving member 25 can be configured to be small enough for the respective stopper rod 21 to be fitted and detached.
5 is easy to arrange and attach.

The rail clamp truck 62 is provided with a traveling device 52.
, It is always positioned on the rail 58 and does not hinder the lateral movement of the sill beam 50. On the other hand, the horizontal vibration in the traveling direction of the crane at the time of the occurrence of the earthquake is caused by the frictional sliding between the rail clamp 69 and the rail 58 surface and the wheel 56 and the rail 58 surface acting as a buffering action. By adjusting the distance, the seismic force is reduced by moving within the limited gap (about ± 100 mm), and the impact force is sufficiently reduced.

According to the seismic isolation type escape prevention device 100 of the present embodiment having the above-described configuration, the seismic force between the traveling device 52 and the sill beam 50 is not hindered when an earthquake occurs. It is possible to restrict entry and to prevent the wheel from coming off and being damaged, and to provide the crane with high safety. Further, the seismic isolation type escape prevention device of the present embodiment is significantly simplified, and it is possible to provide an economical escape prevention device as compared with a crane equipped with a conventional seismic isolation device. ing.

[Second Embodiment] Next, a second embodiment of the seismic isolation type escape prevention device of the present invention will be described below with reference to FIGS. Note that the structure of the seismic isolation type crane equipped with the seismic isolation type escape prevention device of the present embodiment is the same as that of the first embodiment, and a description thereof will be omitted. FIG. 4 is a side view of the stopper device 15 provided in the seismic isolation type escape prevention device 100 of the present embodiment, and FIG. 5 is a view taken along arrows V to V in FIG.

As shown in FIGS. 4 and 5, the stopper device 15 of the seismic isolation type escape prevention device according to the present embodiment moves up and down along the vertical guide 27 within the cross beam 16a of the support member 16. A possible lifting block 28 is provided to be moved up and down manually or by driving means 29. The vertical block-shaped link member 30 is
The main body frame 20 is connected in parallel via the vertical axis 31. A pair of stopper rods 21 are fixed to the main body frame 20, and each of the stopper rods 21 can be fitted into the receiving metal 25 by lowering the main body frame 20. Further, on both sides of the cross beam 16a, stoppers 32 (stopper members) which are in contact with the outer surface of the vertical plate-like link member 30 and which project at a fixed angle so as to limit lateral movement are provided. The shear pin 20a having a predetermined shear strength for preventing the swing of the main body frame 20 during the normal operation of the crane is provided between the extended end of the link connecting portion on one side of the lifting block 28 and the upper surface of the vertical plate-like link member 30 ( (Between the lifting block 28 and the body frame 20). The stopper 32 may have any configuration.

The pair of fixed stopper rods 21 of the main body frame 20 are connected to the vertical plate-like link member 30 within a range permitted by the stopper 32 when the shear pin 20a is broken.
Can freely rotate to the left and right, and can move laterally from the neutral position shown by the solid line in FIG. The configuration and arrangement of each of the receivers 25 provided at the rest position of the crane may be the same as in the first embodiment, and the other configurations whose description is omitted are the same as those in the first embodiment. .

Therefore, the seismic isolation type escape prevention device 100 of this embodiment is also provided on the sill beam 50 on the crane main body (work machine main body) side in the same manner as in the first embodiment, and the base surface of the rail 58 is provided. A vertically movable stopper rod 21 that is inserted and withdrawn from each of the receivers 25 provided on the base, and a stopper rod 21 provided between the stopper rod 21 and the crane body. Seismic isolation mechanism 10 allowed in the lateral direction
0A (second seismic isolation means). The seismic isolation mechanism 100A according to the present embodiment has a
(A stopper rod holding body), an elevating block 28 held at the lower part of the sill beam 50 of the crane main body so as to be capable of elevating operation, and a pair of vertical plate link members 30 for connecting the elevating block 28 and the main body frame 20 in parallel link. And a configuration having:

According to the seismic isolation type escape prevention device 100 of the present embodiment having the above-described configuration, the insertion and the pull-up of each stopper rod 21 into each of the receivers 25 are performed by lowering the elevating block 28 by the driving means 29. And ascending. The amount of displacement of the stopper rod 21 in the running direction caused by the rotation of the vertical plate-like link member 30 is extremely small.
There is no need to change the configuration of. The lifting block 28 and the main body block 20 are moved up and down at once, and
Since the stopper rods 21 are fixed, the operation of fitting and removing the stopper rods 21 from and to the receivers 25 is relatively easy.

[Third Embodiment] Next, a third embodiment of the seismic isolation type escape prevention device of the present invention will be described below with reference to FIGS. The structure of the seismic isolation type crane equipped with the seismic isolation type escape prevention device of this embodiment and the horizontal escape mechanism thereof is the same as in the first embodiment, and the description thereof will be omitted. FIG.
FIG. 7 is a side view of the stopper device 15 provided in the seismic isolation type escape prevention device 100 of the present embodiment, and FIG. 7 is a view taken along arrows VII to VII of FIG.

As shown in FIGS. 6 and 7, the stopper device 15 of the seismic isolation type escape prevention device of the present embodiment has a support member 16 which can swing in the horizontal direction and extends downward from the sill beam 50. It is protruding. That is, the support member 16
A saddle 16c of a fixed length fixed to the lower surface of the sill beam 50, an intermediate link member 16d having an upper end connected to the saddle 16c by a horizontal axis, and an intermediate link member 1d.
A stopper support block 16e whose upper end is connected to the lower end of 6d on the horizontal axis. And saddle 1
On both sides of 6c, stoppers 33 (stopper members) for restricting the swing of the intermediate link member 16d within a certain angle are provided.

The body frame 20 of the stopper device 15 is
The stopper support block 16e is coaxially fixed and integrally provided. The pair of vertically movable stopper rods 21 provided on the main body frame 20 are vertically moved by a manual handle 23 or the like. . Each receipt 25
May have the same configuration as that of the first embodiment, and other components are the same as those of the first embodiment. Therefore, the seismic isolation type escape prevention device 100 of this embodiment is also provided on the sill beam 50 on the crane main body (working machine main body) side and provided on the base surface of the rail 58, similarly to the first embodiment. The stopper rods 21 are vertically movable and inserted and withdrawn from the respective receivers 25. The stopper rods 21 are provided between the stopper rods 21 and the crane main body. A seismic isolation mechanism 100A (second seismic isolation means) is provided. The seismic isolation mechanism 100A according to the present embodiment includes an intermediate link member 16d that is pin-coupled to the lower part of the crane main body so as to be able to swing laterally, and a lateral direction with respect to the lower part of the intermediate link member 16d. A stopper support block 16e (support block) pivotally connected to a pin, and a main body frame 20 (stopper rod holder) fixed to the stopper support block 16e and holding each stopper rod 21 so as to be able to move up and down. Is adopted.

A non-oscillating connection between the saddle 16c and the intermediate link member 16d, and between the intermediate link member 16d and the support block 16e, respectively, by a shear pin 34 or the like that breaks with a constant impact force at the time of the earthquake. Have been. Then, during normal operation of the crane, the pair of stopper rods 21 can be fitted and detached from the respective receiving members 25 on both sides straddling the rail 58.

According to the seismic isolation type escape prevention device of the present embodiment having the above-described configuration, when an earthquake occurs during the operation of the crane, the driver stops the crane at the nearest stop position and stops the crane. 15 is anchored to the receiver 25. When the shear pins of the bearings 11 and 12 and the shear pin 34 of the support member 16 are cut by the impact force of the earthquake in this anchoring connection state, the intermediate link member 16d of the stopper device 15 is disconnected. The saddle 16c is free to rotate between the left and right stoppers 33.

Although not shown, the crane body side saddle 16c and the intermediate link member 16d, and the intermediate link member 16d and the stopper support block 16e are connected by shear pins having a predetermined shear strength. It has a configuration.

[Fourth Embodiment] Next, a fourth embodiment of the seismic isolation type escape prevention device of the present invention will be described below with reference to FIGS. Note that the structure of the seismic isolation type crane equipped with the seismic isolation type escape prevention device of the present embodiment is the same as that of the first embodiment, and a description thereof will be omitted. FIG. 8 is a longitudinal sectional view of the stopper device 15 provided in the seismic isolation type escape prevention device 100 of the present embodiment, and FIG. 9 is a view taken along arrows IX to IX in FIG.

The seismic isolation type escape prevention device 100 of this embodiment
Means that the support member 16 has a sill beam 50 at the upper end.
A fixing portion 16A fixed to the lower surface of the central portion of
A trapezoidal portion 16B is formed at the lower end of the trapezoidal portion 16A, and has a wide shape continuously at the lower end of the trapezoidal portion 16B.
And a stopper accommodating portion 16 </ b> C having a space for accommodating therein. Further, the support member 16
The bottom of the lower end of the stopper accommodating portion 16C is open, so that the stopper rod 39 can protrude downward from here.

The stopper device 15 of the present embodiment is provided so as to be able to move up and down along the inner wall of the stopper accommodating portion 16C, and has a vertically movable lifting frame 35 and a support member 1
Lifting drive means 3 provided between the lifting frame 6 and the lifting frame 35
6, a horizontal horizontal guide portion 37 having a rectangular cross section projecting inward from and facing the horizontal wall surface of the lifting frame 35, and contacting the upper and lower surfaces of the horizontal guide portion 37 in the longitudinal direction (FIG. 8) (a vertical direction on the paper surface), the horizontal slide frame 3 provided between the horizontal guide portions 37 so as to be slidable.
8 and a pair of stopper rods 39 provided on the horizontal slide frame 38 and fixed vertically at symmetrical positions at predetermined intervals. A gap c of about 300 mm is provided between both ends of the horizontal slide frame 38 and inner walls of both ends of the lifting frame 35 (see FIG. 9). In addition, both side walls 35 a of the elevating frame 35 form stopper members that limit the lateral movement of the elevating frame 35 with respect to the horizontal slide frame 38. Note that, instead of the lifting / lowering drive means 36, a manual mechanism for manually lifting / lowering the lifting / lowering frame 35 can be employed. As in the case of the above-described first embodiment, each of the receivers 25 to be fitted to and disengaged from the pair of stopper rods 39 is buried in the base surface on both sides straddling the rail 58.

Therefore, the seismic isolation type escape prevention device 100 of this embodiment is also provided on the sill beam 50 on the crane main body (working machine main body) side in the same manner as in the first embodiment. A vertically movable stopper rod 39 which is inserted and withdrawn from each of the receivers 25 provided on the main body, and a stopper rod 39 provided between the stopper rod 39 and the crane main body. The configuration is provided with a horizontal relief mechanism 100A (second seismic isolation means) allowed in the lateral direction. Then, the horizontal escape mechanism 100A of the present embodiment
Is a horizontal slide frame 38 (stopper rod holder) integrally provided with each stopper rod 39, an elevating frame 35 for sandwiching and supporting the horizontal slide frame 38 slidably in the horizontal direction, and the elevating frame 3
5 is accommodated in the inside and vertically supported so as to be supported by a guide, and a support portion 16 (support frame) fixed to a lower portion of the crane body is adopted. A shear pin 2 having a predetermined shear strength is provided between the horizontal slide frame 38 (stopper rod holder) and the lifting frame 35.
0a.

According to the present embodiment, the pair of stopper rods 39 are moved into the respective receiving members 25 only by lowering and raising the lifting frame 35 in the support member 16 by a certain height manually or by the driving means 36. Can be inserted into and removed from. Further, the stopper device 15 is built in the integral fixed support member 16, and the lifting frame 35 on which the stopper rods 39 are fixedly mounted is lowered to be fixed to the respective holders 25, so that the seismic shock in the horizontal direction can be reduced. 39, the lifting frame 35, and the support member 16 are supported by a vertical structure, so that there is an advantage that the configuration can be made compact with less trouble.

[Fifth Embodiment] Next, a fifth embodiment of the seismic isolation type escape prevention device of the present invention will be described below with reference to FIGS. Note that the structure of the seismic isolation type crane equipped with the seismic isolation type escape prevention device of the present embodiment is the same as that of the first embodiment, and a description thereof will be omitted. FIG. 10 is a side view of the stopper device 15 provided in the seismic isolation type escape prevention device 100 of the present embodiment, and FIG.
It is an arrow view.

In this embodiment, when a pair of fixed type stopper rods 39 receive a horizontal impact force of a predetermined value or more due to an earthquake or the like in a state where they are respectively connected to the metal receiver 25, the horizontal slide frame 38 It is configured so that it can be inclined at a certain angle to absorb horizontal impact force.

In FIGS. 10 and 11, reference numeral 40 denotes a hole formed in each of the upper and lower horizontal plates 38a and 38b of the horizontal slide frame 38 for mounting the stopper rod 39 having an inner diameter larger than the outer diameter of the stopper rod 39. Also, 41
Are mounting flanges fixed to the upper and lower positions of the stopper rods 39 so as to be in contact with the upper surface of the horizontal plate 38a and the lower surface of the horizontal plate 38b. Reference numeral 42 denotes a pair of upper and lower horizontal plates 38 at each of two mounting flanges 41 at two intersections at an angle of 45 ° with respect to the extending direction of the rail 58 when viewed in a plan view.
These are shear pins for attaching the stopper rod 39, which are fixed to a and 38b and are broken by an impact force at the time of an earthquake. The sheer pins 42 can be provided in further different forms. Other configurations are substantially the same as those of the first embodiment.

Therefore, the seismic isolation type runaway prevention device 100 of this embodiment is also provided on the sill beam 50 on the crane main body (working machine main body) side in the same manner as in the first embodiment, and the base surface of the rail 58 is provided. A vertically movable stopper rod 39 which is inserted and withdrawn from each of the receivers 25 provided on the main body, and a stopper rod 39 provided between the stopper rod 39 and the crane main body. The configuration is provided with a horizontal relief mechanism 100A (second seismic isolation means) allowed in the lateral direction. Then, the horizontal escape mechanism 100A of the present embodiment
Is a horizontal slide frame 38 (stopper rod holder) that supports each stopper rod 39 so as to be tiltable within a predetermined angle range, and an elevating frame 35 that guides and supports the horizontal slide frame 38 so as to be slidable in the horizontal direction.
And a supporting portion 16 (supporting frame) fixed to the lower part of the crane main body and housing the lifting frame 35 therein so as to be vertically movable and supported by a guide. The horizontal slide frame 38 (stopper rod holder) and the elevating frame 35 are connected by a shear pin 20a having a predetermined shear strength.

This structure can be applied to the stopper device 15 of the second embodiment (that is, the main frame 20 swings in the horizontal direction with respect to the lifting block 28). Instead of moving, each stopper rod 21 is inclined and swings with respect to the main body frame 20.)

FIGS. 10 and 11 show two stopper rods 39.
Are lowered and connected to the respective receiving members 25. In the present embodiment, the connection between the lifting frame 35 and the horizontal slide frame 38 is made by the impact force due to the horizontal vibration at the time of an earthquake or the like in a state where each stopper rod 39 is inserted into each receiving member 25. When the shear pin 20a is broken, the support portion 16 is moved together with the crane body as shown in FIG.
Horizontally vibrates leftward on the paper surface, and the left end of the horizontal slide frame 38 abuts against the left side wall of the lifting block 35 and stops. At this time, the shear force is received and broken by the shear pin 42, so that the impact force is buffered. In a state where the impact force is weakened, the stopper rod 39 is connected to the upper and lower rod mounting holes 40 as shown by a two-dot chain line in FIG. Receiving 25 by tilting to the extent permitted
Will be stopped.

Even when the crane main body vibrates in the direction in which the rail 58 extends due to the earthquake, as shown in FIG. 11, for example, the breaking of the shear pin 42 at the limit position where the support portion 16 moves rightward in FIG. , And the stopper rod 39 can be tilted and stopped.

[0065]

According to the first aspect of the present invention, there is provided a seismic isolation type escape prevention device which is provided on a work machine main body, and which is inserted into and withdrawn from a receiver provided on a base surface of a rail. A structure comprising: a stopper rod; and second seismic isolation means provided between the stopper rod and the work machine main body, and allowing the work machine main body to swing with respect to the stopper rod at least in a lateral direction. Adopted. According to this configuration, in a state where the work machine is moved to a predetermined rest position and stopped to prevent runaway, when a vibration force such as an earthquake is applied, the work machine body swings with respect to both the traveling device and the stopper rod. The seismic force that moves and enters the work machine body can be reduced. At this time, since the second seismic isolation mechanism is interposed between the work machine main body and the stopper rod, the work machine main body on the first seismic isolation mechanism is not obstructed in the lateral direction. Therefore, when the work machine supporting the work machine main body via the seismic isolation mechanism (first seismic isolation mechanism) on the traveling device is subjected to a horizontal swing crossing the rail horizontally, the seismic isolation is performed. The function of the mechanism can be effectively exerted, and damage to the working machine and detachment from the rail can be prevented.

According to a second aspect of the present invention, in the seismic isolation type escape prevention device, the second seismic isolation means is provided integrally with a support member fixed to a lower portion of the working machine main body, and has a lateral center axis. A configuration including a horizontal axis and a stopper rod holding body that holds the stopper rod so as to be able to move up and down and that is slidably supported along the horizontal axis is employed. According to this configuration,
The effect of claim 1 can be reliably obtained even with a cheap configuration.

Further, the seismic isolation type escape prevention device according to claim 3 employs a configuration in which the support member and the stopper rod holder are connected by a shear pin having a predetermined shear strength. According to this configuration, it is possible to automatically activate the second seismic isolation mechanism by sensing the strength of the roll.

According to a fourth aspect of the present invention, in the seismic isolation type escape prevention device, the second seismic isolation means can move up and down on the lower part of the working machine body with the stopper rod holding body integrally provided with the stopper rod. A configuration including a held elevating block and at least one pair of vertical plate-like link members for connecting the elevating block and the stopper rod holding body in a parallel link is adopted. According to this configuration, it is possible to surely obtain the effect of claim 1 even though the configuration is inexpensive.

Further, the seismic isolation type escape prevention device according to claim 5 employs a configuration in which the elevating block and the stopper rod holding body are connected by a shear pin having a predetermined shear strength. According to this configuration, it is possible to automatically activate the second seismic isolation mechanism by sensing the strength of the roll.

The seismic isolation type escape prevention device according to claim 6 is characterized in that the second seismic isolation means includes an intermediate link member pin-connected to the lower part of the work machine main body so as to be able to swing laterally; A support block fixed to the support block and pinned to a lower portion of the intermediate link member so as to be capable of swinging in a lateral direction; Adopted. According to this configuration, it is possible to surely obtain the effect of claim 1 even though the configuration is inexpensive.

Further, in the seismic isolation type escape prevention device according to claim 7, the work machine body and the intermediate link member and the intermediate link member and the support block are respectively connected by shear pins having a predetermined shear strength. Was adopted. According to this configuration, it is possible to automatically activate the second seismic isolation mechanism by sensing the strength of the roll.

Further, in the seismic isolation type escape prevention device according to the eighth aspect, the second seismic isolation means includes a stopper rod holder integrally provided with a stopper rod, and the stopper rod holder is slid in the lateral direction. A lifting frame that is sandwiched as much as possible to support the guide, and a supporting frame that accommodates the lifting frame and accommodates the lifting frame so as to be vertically movable and that is fixed to the lower part of the work machine main body are adopted. According to this configuration, it is possible to surely obtain the effect of claim 1 even though the configuration is inexpensive.

Further, the seismic isolation type escape prevention device according to the ninth aspect employs a configuration in which the stopper rod holder and the lifting frame are connected by a shear pin having a predetermined shear strength. According to this configuration, it is possible to automatically activate the second seismic isolation mechanism by sensing the strength of the roll.

According to a tenth aspect of the present invention, in the seismic isolation type escape prevention device, the second seismic isolation means supports a stopper rod that tiltably supports the stopper rod within a predetermined angle range.
An elevating frame that supports the guide by sandwiching the stopper rod holder slidably in the lateral direction, and a supporting frame that accommodates the elevating frame and guides it so that it can move up and down, and is fixed to the lower part of the working machine body And the configuration provided. According to this configuration, it is possible to surely obtain the effect of claim 1 even though the configuration is inexpensive.

Further, in the seismic isolation type escape prevention device according to the eleventh aspect, the distance between the stopper rod holder and the elevating frame is
A configuration in which the components are connected by a shear pin having a predetermined shear strength is employed. According to this configuration, it is possible to automatically activate the second seismic isolation mechanism by sensing the strength of the roll.

[Brief description of the drawings]

FIG. 1 is a side view showing the periphery of a leg of a seismic isolation type crane provided with a first embodiment of a seismic isolation type runaway prevention device of the present invention.

FIG. 2 is a diagram showing the seismic isolation type escape prevention device, and is an enlarged side view of a part II in FIG. 1;

FIG. 3 is a view showing the seismic isolation type escape prevention device, and is a view taken in the direction of arrows III to III in FIG. 2;

FIG. 4 is a side view showing a second embodiment of the seismic isolation type escape prevention device of the present invention.

FIG. 5 is a view showing the seismic isolation type escape prevention device, and is a view as seen from arrows V to V in FIG. 4;

FIG. 6 is a side view showing a third embodiment of the seismic isolation type escape prevention device of the present invention.

FIG. 7 is a view showing the seismic isolation type escape prevention device, and is a view taken along arrows VII to VII in FIG. 6;

FIG. 8 is a side view showing a fourth embodiment of the seismic isolation type escape prevention device of the present invention.

9 is a view showing the seismic isolation type escape prevention device, and is a view taken in the direction of arrows IX to IX in FIG. 8;

FIG. 10 is a side view showing a fifth embodiment of the seismic isolation type escape prevention device of the present invention.

FIG. 11 is a view showing the seismic isolation type escape prevention device,
FIG. 11 is a view taken along arrows XI to XI in FIG. 10.

FIG. 12 is a side view around a leg of a crane provided with a conventional escape prevention device.

FIG. 13 is a view showing the escape prevention device, and FIG.
It is an enlarged side view of the XI part.

14 is a view showing the escape prevention device, and FIG.
FIG.

FIG. 15 is a view showing the escape prevention device, and FIG.
FIG. 3 is a view taken along arrows XIII to XIII in FIG.

[Explanation of symbols]

13, 14 ... seismic isolation mechanism (first seismic isolation mechanism) 16 ... support part (support frame, support member) 16d ... intermediate link member 16e ... stopper support block (support block) 17 , 32, 33, 35a ... vertical plate, stopper, stopper, side plate (stopper member) 18 ... horizontal shaft 20, 38 ... body frame, horizontal slide frame (stopper rod holder) 20a ... shear pin 21, 39 ··· Stopper rod 25 · · · Receiving 28 · · · Elevating block 30 · · · Vertical plate-shaped link member 35 · · · Elevating frame 50 ... Sill beam (work machine body) 52 ... Traveling Device 58: Rail 100: Seismic isolation type escape prevention device 100A: Horizontal escape mechanism (second seismic isolation means)

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2000-177982 (JP, A) JP-A-8-333082 (JP, A) JP-A-53-140756 (JP, A) (JP, U) Japanese Utility Model Showa 50-61570 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B66C 9/18 B66C 15/00

Claims (11)

(57) [Claims] A work machine having a traveling device traveling along a rail and a work machine body supported on the traveling device via a first seismic isolation mechanism is prevented from running away, and A seismic isolation type escape prevention device that allows the work machine main body to sway in the horizontal direction that intersects horizontally, and is provided on the work machine main body, and provided on a base provided on the base surface of the rail. A vertically movable stopper rod to be inserted and withdrawn from the stopper, and a stopper rod provided between the stopper rod and the work machine main body, and allowing the work machine main body to swing with respect to the stopper rod at least in the lateral direction. And a second seismic isolation means. 2. The seismic isolation type escape prevention device according to claim 1, wherein the second seismic isolation means is provided integrally with a support member fixed to a lower portion of the work machine main body, and is configured to pivot in the lateral direction. A seismic isolation runaway, comprising: a horizontal axis as a center; and a stopper rod holding body that holds the stopper rod so as to be able to move up and down and that is slidably supported along the horizontal axis. Prevention device. 3. The seismic isolation type escape prevention device according to claim 2, wherein the support member and the stopper rod holder are connected by a shear pin having a predetermined shear strength. Seismic escape control device. 4. The seismic isolation type escape prevention device according to claim 1, wherein the second seismic isolation means includes: a stopper rod holding body integrally provided with the stopper rod; A seismic isolation type escape prevention device, comprising: an elevating block operably held; and at least a pair of vertical plate-like link members for connecting a parallel link between the elevating block and the stopper rod holding body. . 5. The seismic isolation type escape prevention device according to claim 4, wherein the lifting block and the stopper rod holding body are connected by a shear pin having a predetermined shear strength. Seismic escape control device. 6. The seismic isolation type escape prevention device according to claim 1, wherein the second seismic isolation means is pin-coupled to the lower part of the work machine main body so as to be swingable in the lateral direction. A member, a support block that is pin-coupled to the lower part of the intermediate link member so as to swing in the lateral direction, and a stopper rod holder that is fixed to the support block and holds the stopper rod so that it can move up and down. A seismic isolation type escape prevention device characterized by comprising: 7. The shear pin according to claim 6, wherein the shear pin has a predetermined shear strength between the work machine body and the intermediate link member and between the intermediate link member and the support block. A seismic isolation type escape prevention device characterized by being connected by: 8. The seismic isolation type escape prevention device according to claim 1, wherein the second seismic isolation means includes: a stopper rod holding body provided integrally with the stopper rod; An elevating frame that slidably sandwiches in the direction and supports the guide, and a supporting frame that accommodates the elevating frame and guides it so that it can move up and down and that is fixed to the lower part of the working machine body. A seismic isolation type escape prevention device, characterized in that: 9. The seismic isolation type escape prevention device according to claim 8, wherein the stopper rod holder and the lifting frame are connected by a shear pin having a predetermined shear strength. Seismic escape control device. 10. The seismic isolation type escape prevention device according to claim 1, wherein the second seismic isolation means supports the stopper rod so as to be tiltable within a predetermined angle range, and the stopper. An elevating frame that guides and supports the rod holder by slidably sandwiching the rod holder in the lateral direction; a supporting frame that accommodates the elevating frame and guides it vertically movably, and that is fixed to a lower portion of the working machine body A seismic isolation type escape prevention device characterized by comprising: 11. The seismic isolation type escape prevention device according to claim 10, wherein the stopper rod holder and the lifting frame are connected by a shear pin having a predetermined shear strength. Seismic escape control device.