JP2010235300A - Derailment prevention mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the derailment of a crane during the occurrence of an earthquake by an extremely simple mechanism. <P>SOLUTION: Traveling devices 3 are disposed at four corners of a crane body 2, respectively. The crane includes a main equalizer beam 4 pivotally supporting these traveling devices 3 on the crane body 2; two intermediate equalizer beams 5 and 6 pivotally supported at both ends of the main equalizer beam 4; and two boggy trucks 11 and 12 pivotally supported at both ends of these intermediate equalizer beams 5 and 6, respectively. There is a weight difference between these two boggy trucks 11 and 12 pivotally supported at both ends of these intermediate equalizer beams 5 and 6. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a derailment prevention mechanism, and more particularly to a derailment prevention mechanism that prevents a large crane from derailing when an earthquake occurs.

  As shown in FIGS. 7 and 8, in a large container crane, an unloader, or the like, the crane body 101 is generally configured in a gate shape, and traveling devices 102 are provided at the four corners. In a traveling crane having such a portal crane body, a lateral overturning moment load M and a torsional load from the traveling direction to the right and left are obtained along with a lateral excitation force R that is perpendicular to the traveling direction due to vibration during an earthquake. (Swivel load) S and shocking axial load A are applied. Also, if you have a large portal crane, the center of gravity is much higher than the overhead traveling crane, and the natural period is longer. growing.

  For this reason, it has been proposed to provide a base crane body with a seismic isolation device (see, for example, Patent Document 1). Although the seismic isolation device is effective for protecting the crane structure, it has not been able to completely prevent the lifting of the wheels of the traveling device caused by the shaking of the portal crane body. If the wheels of the traveling device are lifted, the wheels may come off the rails when landing and may be derailed. The problem was that it took time to recover after the earthquake.

JP 2000-143153 A

  An object of the present invention is to provide a derailment prevention mechanism that prevents the derailment of a large crane when an earthquake occurs with an extremely simple mechanism.

  The derailment prevention mechanism according to the present invention is provided with a traveling device at the four corners of the crane body, and each traveling device is pivotally supported on the main equalizer beam pivotally supported on the crane body, and on both ends of the main equalizer beam. In a crane composed of two intermediate equalizer beams and two bogies pivotally supported at both ends of the intermediate equalizer beam, the weight difference between the two bogies pivoted at both ends of the intermediate equalizer beam is increased. It is characterized by having it.

  The derailment prevention mechanism according to the present invention is provided with a traveling device at the four corners of the crane body, and each traveling device is pivotally supported on the main equalizer beam pivotally supported on the crane body, and on both ends of the main equalizer beam. In a crane composed of two intermediate equalizer beams and two bogies supported at both ends of the intermediate equalizer beam, the center of gravity of the main equalizer beam is decentered from the support shaft of the main equalizer beam. It is what.

  The derailment prevention mechanism according to the present invention is provided with a traveling device at the four corners of the crane body, and each traveling device is pivotally supported on the main equalizer beam pivotally supported on the crane body, and on both ends of the main equalizer beam. In a crane composed of two intermediate equalizer beams and two bogies supported on both ends of the intermediate equalizer beam, the center of gravity of each bogie is decentered from the support shaft of each bogie. It is what.

  The derailment prevention mechanism according to the present invention is provided with a traveling device at the four corners of the crane body, and each traveling device is pivotally supported on the main equalizer beam pivotally supported on the crane body, and on both ends of the main equalizer beam. In a crane composed of two intermediate equalizer beams and two bogies pivotally supported at both ends of the intermediate equalizer beam, the weight difference between the two bogies pivoted at both ends of the intermediate equalizer beam is increased. The center of gravity of the main equalizer beam is decentered from the support shaft of the main equalizer beam, and the center of gravity of the bogie is decentered from the support shaft of the bogie.

  A derailment prevention mechanism according to the present invention is a crane provided with traveling devices at the four corners of a crane body, wherein each traveling device is supported by a main equalizer beam pivotally supported by the crane body, and at both ends of the main equalizer beam. Two first intermediate equalizer beams that are pivotally supported, a drive bogie that is pivotally supported at one end of the first intermediate equalizer beam, and a second intermediate equalizer beam that is pivotally supported at the other end of the first intermediate equalizer beam A driven bogie that is provided at one end of the second intermediate equalizer beam and a driven wheel that is provided at the other end of the second intermediate equalizer beam, and the beam length of the first intermediate equalizer beam The beam length on the side of the driving bogie is longer than the beam length on the side of the driven bogie.

  In the first invention, since the weight difference is given to the two bogies that are pivotally supported at both ends of the intermediate equalizer beam, it is possible to prevent the bogie with the heavier weight from being lifted. Can be prevented.

  In the second invention, since the center of gravity of the main equalizer beam is decentered from the support shaft of the main equalizer beam, the main equalizer beam is inclined to the eccentric side, and the bogie truck on the side where the main equalizer beam is eccentric is prevented from being lifted Can be prevented, and can prevent the wheel from falling off due to earthquake.

  In the third invention, since the center of gravity of each bogie is decentered from the support shaft of each bogie, it is possible to prevent the wheel on the side where the center of gravity of each bogie is decentered from being lifted. Can be prevented.

  According to a fourth aspect of the present invention, there is provided a weight difference between two bogies that are pivotally supported at both ends of the intermediate equalizer beam, the center of gravity of the main equalizer beam is decentered from the support shaft of the main equalizer beam, and the center of gravity of the bogie Is offset from the support shaft of the bogie, so that the main equalizer beam tilts and prevents the bogie with the heavier weight from being lifted, and lifts the wheel on the side where the center of gravity of each bogie is decentered. It is possible to prevent the wheel from falling off due to an earthquake.

  In the fifth aspect of the invention, the beam length of the first intermediate equalizer beam is made longer on the driving bogie truck side than on the driven bogie truck side. Can be prevented, and derailment due to an earthquake can be prevented.

It is a side view showing one embodiment of a derailment prevention mechanism concerning the present invention. It is a side view which shows other embodiment of the derailment prevention mechanism which concerns on this invention. FIG. 10 is a side view showing still another embodiment of the derailment prevention mechanism according to the present invention. FIG. 10 is a side view showing still another embodiment of the derailment prevention mechanism according to the present invention. FIG. 10 is a side view showing still another embodiment of the derailment prevention mechanism according to the present invention. It is a side view of the large sized crane provided with the derailment prevention mechanism concerning the present invention. It is a front view of the conventional large crane. It is a side view of the conventional large crane.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(1) Embodiment 1
First, a first embodiment of the present invention will be described. FIG. 6 is a side view of a large crane equipped with a derailment prevention mechanism according to the present invention. In this large crane (for example, a container crane) 1, a crane main body 2 is formed in a gate shape, and traveling devices 3 are provided at four corners, respectively. As shown in FIG. 1, each traveling device 3 includes one main equalizer beam 4, first and second two intermediate equalizer beams 5 and 6, first to fourth four bogies 11, 12, 13, 14.

  The main equalizer beam 4 is pivotally supported by a support shaft 18a on a bracket 17a at a right end portion (also referred to as an outer end portion) of the crane body 2. The first intermediate equalizer beam 5 is pivotally supported by a support shaft 18b on a bracket 17b at the left end (also referred to as inner end) of the main equalizer beam 4, and the second intermediate equalizer beam 6 is The equalizer beam 4 is pivotally supported by a support shaft 18c on a bracket 17c at a right end portion (also referred to as an outer end portion).

  Further, the first bogie bogie 11 is rotatably supported by a support shaft 18d on a bracket 17d provided on the lower surface of the left end portion (also referred to as an outer end portion) of the first intermediate equalizer beam 5, and the second bogie bogie 12 is supported. Is rotatably supported by a support shaft 18e on a bracket 17e provided on the lower surface of the right end portion (also referred to as an inner end portion) of the first intermediate equalizer beam 5.

  Further, the third bogie 13 is rotatably supported by a support shaft 18e on a bracket 17e provided on the lower surface of the left end (also referred to as the inner end) of the second intermediate equalizer beam 6, and the fourth bogie 14 Is rotatably supported by a support shaft 18d on a bracket 17d provided on the lower surface of the right end portion (also referred to as an outer end portion) of the second intermediate equalizer beam 6.

  The first and fourth bogies 11 and 14 are drive carts provided with a drive motor 19. On the other hand, the second and third bogies 12 and 13 are driven carts without a drive motor. Therefore, the first and fourth bogies 11 and 14 are heavier than the second and third bogies 12 and 13 by the drive motor. The bogies 11 to 14 each have four wheels 31, 32, 33, and 44.

  Therefore, when an earthquake occurs, the four wheels 31, 32, 33, and 34 of the first bogie 11 equipped with the drive motor 19 are prevented from being lifted, and the wheel removal due to the earthquake can be prevented.

(2) Embodiment 2
Next, a second embodiment of the present invention will be described. In addition, about the site | part which overlaps with 1st Embodiment of this invention, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  In the present invention, as shown in FIG. 2, a weight 21 is provided on the left end portion side of the main equalizer beam 4, that is, on the first bogie carriage 11 side, and the center of gravity G1 of the main equalizer beam 4 is set to the first bogie from the support shaft 18a. The vehicle 11 is decentered by a predetermined distance L1.

  Therefore, when an earthquake occurs, the left end side of the main equalizer beam 4 is inclined downward with the support shaft 18a as an axis, and the first bogie 11 is prevented from being lifted.

(3) Embodiment 3
Next, a third embodiment of the present invention will be described. In addition, about the site | part which overlaps with 1st, 2nd embodiment of this invention, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  In the present invention, as shown in FIG. 3, a weight 22 is provided on the right side of the bogies 13 and 14, and the center of gravity G2 of the bogies 13 and 14 is set on the right side of the bogies 13 and 14 with respect to the support shafts 18d and 18e. The distance L2 is decentered.

  Therefore, when an earthquake occurs, the wheels 31 and 32 of the bogies 13 and 14 are prevented from lifting. For the bogies 11 and 12, a weight 22 is provided on the left side of the support shafts 18d and 18e.

(4) Embodiment 4
Next, a fourth embodiment of the present invention will be described. In addition, about the site | part which overlaps with 1st, 2nd, 3rd embodiment of this invention, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  As shown in FIG. 4, the present invention provides a weight difference between the two bogies 11 and 12, decenters the main equalizer beam 4 from the support shaft 18a to the bogie 11 by a predetermined distance L1, and The center of gravity G2 of the bogies 11-14 is eccentric by a predetermined distance L2.

  Therefore, when an earthquake occurs, the main equalizer beam 4 is inclined to the side where the center of gravity G1 is eccentric with the support shaft 18a as an axis, and the first bogie 11 can be prevented from being lifted, and the bogies 11 to 11 can be prevented. It is possible to prevent the wheels 31 and 32 on the side where the center of gravity G2 of 14 is eccentric from being lifted.

(5) Embodiment 5
Next, a fifth embodiment of the present invention will be described. As shown in FIG. 5, each traveling device 3 includes one main equalizer beam 4, cantilevered first and second intermediate equalizer beams 7 and 8, cantilevered third and fourth intermediate equalizer beams 9, 10, four bogies 11, 12, 15, 16 and two driven wheels 13, 14.

  The main equalizer beam 4 is pivotally supported by a support shaft 18a on a bracket 17a at a right end portion (also referred to as an outer end portion) of the crane body 2. The first intermediate equalizer beam 7 is pivotally supported by a support shaft 18b on a bracket 17b at the left end (also referred to as an inner end) of the main equalizer beam 4, and the second intermediate equalizer beam 8 is The equalizer beam 4 is pivotally supported by a support shaft 18c on a bracket 17c at a right end portion (also referred to as an outer end portion).

  The third intermediate equalizer beam 9 is pivotally supported by a support shaft 18 d on a bracket 17 d at the right end of the first intermediate equalizer beam 7, and the fourth intermediate equalizer beam 10 is the same as the fourth intermediate equalizer beam 10. The left end bracket 17e is pivotally supported by a support shaft 18e.

  The first bogie bogie 11 is rotatably supported by a support shaft 18f on a bracket 17f provided on the lower surface of the left end portion of the first intermediate equalizer beam 7. Further, the second bogie 12 is rotatably supported by a support shaft 18g on a bracket 17g provided on the lower surface of the left end portion of the third intermediate equalizer beam 9, and the driven wheel 13 is connected to the right end of the third intermediate equalizer beam 9. Provided in the department.

  Further, the driven wheel 14 is provided at the left end portion of the fourth intermediate equalizer beam 10, and the bogie bogie 15 is rotatably supported by a support shaft 18g on a bracket 17g provided on the lower surface of the right end portion of the fourth intermediate equalizer beam 10. It is pivotally supported. Furthermore, the sixth bogie 16 is rotatably supported by a support shaft 18f on a bracket 17f provided on the lower surface of the right end portion of the second intermediate equalizer beam 8.

  The bogies 11, 12, 15 and 16 have four wheels 31, 32, 33 and 34, respectively, and the driven wheels 13 and 14 have two wheels 31 and 32. The first and sixth bogies 11 and 16 are provided with a drive motor 19.

  The first intermediate equalizer beam 7 of the present invention has a beam length L5 on the side of the first bogie 11 having a drive motor 19 with respect to the support shaft 17b, and a beam on the side of the third intermediate equalizer beam 9 without the drive motor 19. The length is longer than the length L6. The support shafts 18 a to 18 g are provided toward the land and the sea side of the crane body 2.

  Therefore, when an earthquake occurs, the first bogie bogie 11 having a long beam length is prevented from being lifted.

2 Crane body 3 Traveling device 4 Main equalizer beam 5, 6 Intermediate equalizer beam 11, 12 Bogie truck

Claims (5)

  A traveling device is provided at four corners of the crane body, and each traveling device is provided with a main equalizer beam pivotally supported on the crane body, two intermediate equalizer beams pivotally supported on both ends of the main equalizer beam, and the intermediate A crane constituted by two bogies pivotally supported at both ends of an equalizer beam, wherein the two bogies pivotally supported at both ends of the intermediate equalizer beam have a weight difference. Prevention mechanism.   A traveling device is provided at four corners of the crane body, and each traveling device is provided with a main equalizer beam pivotally supported on the crane body, two intermediate equalizer beams pivotally supported on both ends of the main equalizer beam, and the intermediate In a crane constituted by two bogies supported on both ends of an equalizer beam, a derailment prevention mechanism characterized in that the center of gravity of the main equalizer beam is decentered from the support shaft of the main equalizer beam.   A traveling device is provided at four corners of the crane body, and each traveling device is provided with a main equalizer beam pivotally supported on the crane body, two intermediate equalizer beams pivotally supported on both ends of the main equalizer beam, and the intermediate In a crane constituted by two bogies pivotally supported at both ends of an equalizer beam, a derailment prevention mechanism characterized in that the center of gravity of each bogie is decentered from the support shaft of each bogie.   A traveling device is provided at four corners of the crane body, and each traveling device is provided with a main equalizer beam pivotally supported on the crane body, two intermediate equalizer beams pivotally supported on both ends of the main equalizer beam, and the intermediate In a crane composed of two bogies that are pivotally supported at both ends of the equalizer beam, the two bogies that are pivotally supported at both ends of the intermediate equalizer beam have a weight difference, and the center of gravity of the main equalizer beam is increased. A derailment prevention mechanism characterized in that it is decentered from the support shaft of the main equalizer beam and the center of gravity of the bogie is decentered from the support shaft of the bogie.   In a crane provided with traveling devices at four corners of a crane body, each traveling device is provided with a main equalizer beam that is pivotally supported on the crane body, and two first intermediate equalizers that are pivotally supported on both ends of the main equalizer beam. A beam, a drive bogie supported on one end of the first intermediate equalizer beam, a second intermediate equalizer beam supported on the other end of the first intermediate equalizer beam, and one end of the second intermediate equalizer beam And a driven wheel provided at the other end of the second intermediate equalizer beam, and the beam length of the first intermediate equalizer beam is determined by the beam length on the driven bogie truck side. Also, a derailment prevention mechanism characterized by increasing the beam length on the drive bogie truck side.

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