JP5502828B2 - Heavy load mounting device and heavy load moving method - Google Patents

Description

  The present invention relates to a heavy load mounting device and a heavy load moving method used when moving a heavy load such as a bridge girder.

  2. Description of the Related Art Conventionally, a heavy load mounting device used when moving a bridge girder, which is a heavy load, in a first direction includes a slide device. The slide device includes a crawler plate type feed base having an endless track band that allows the bridge girder to slide in a second direction different from the first direction when the bridge girder is moved in the first direction. The crawler plate type feed base supports the bridge girder placed on the upper portion in a movable manner (see, for example, Patent Documents 1 and 2).

JP 2007-138514 A JP 2006-16795 A

  By the way, in order to rotate or move the bridge girder in a state where the bridge girder is supported by the slide device, the bridge girder is pushed toward the target position by the horizontal jack, that is, in the first direction, and at the same time, the bridge girder is moved on the crawler plate. However, when the bridge girder is pressed and moved in this way, the sliding device may be dragged in the second direction by the frictional force inside the crawler plate type feed base. Then, there is a possibility that the slide device is inclined and the support of the bridge girder becomes unstable.

  The present invention has been made in view of the above circumstances, and when a heavy object such as a bridge girder is rotated or moved laterally, the heavy object can be supported so that it can be safely moved in an extremely stable state. It is an object of the present invention to provide an apparatus and a method for moving a heavy object.

In order to achieve the above object, a heavy article mounting device of the present invention supports a heavy article to be moved in a first direction so as to be movable along the first direction and a second direction different from the first direction. A slide device, a tilt sensor that detects the tilt of the slide device, a traction device that pulls the slide device in a direction opposite to the second direction, and the slide device is tilted from a detection value from the tilt sensor And a control device that causes the sliding device to generate a tensile force in a direction opposite to the second direction by the traction device. The slide device is mounted with, for example, a crawler plate.
More specifically, it is a heavy load mounting device used when a heavy load such as a bridge girder is bridged on a bridge pier, etc., comprising an endless track zone, and the heavy load placed on the endless track zone is a first load. The heavy object placed on the endless track provided along the second direction intersecting the first direction while moving in the direction moves the second object with the rotation of the endless track. A slide device that moves along the direction, an inclination sensor that detects an inclination of the slide device caused by the weight moving along the second direction, and the slide device in the second direction. When it is determined that the slide device is tilted based on the detection value from the tilt sensor and the pulling device that pulls in the opposite direction, the pulling device pulls the slide device in the direction opposite to the second direction. A control device that generates force And said that there were pictures.

  According to this configuration, when the heavy load is rotated or laterally moved, if the slide device that supports the heavy load is movably tilted, the control device drives the traction device to tilt the slide device. It can be corrected automatically. Thereby, a heavy object such as a bridge girder can be safely supported and moved in an extremely stable state.

In the heavy article mounting device according to the present invention, the traction device includes a traction jack having one end connected to the slide device, and the other end of the traction jack at a position separated from the slide device in a direction opposite to the second direction. A clamp for fixing the traction jack to the heavy load, a hydraulic pump for supplying hydraulic pressure to the traction jack to contract the traction jack, and holding the hydraulic pressure from the hydraulic pump at a constant set pressure to hold the traction jack to the weight A relief valve that contracts to follow the movement of the object along the second direction, and an electromagnetic valve provided in a hydraulic path connected to the relief valve, and the control device detects from the inclination sensor. when it is determined that the slide device is tilted from the value, it said actuates the solenoid valve to shut off the hydraulic passage, larger than a predetermined set pressure by the relief valve Or it may be a a hydraulic ones to supply to the traction jack.

  According to this configuration, during normal movement in which the slide device is not inclined, the hydraulic pressure is maintained at a constant set pressure by the relief valve, and the contraction of the traction jack can follow the movement of the heavy object along the second direction. it can. Further, when the slide device is tilted, the hydraulic pressure from the hydraulic pump is supplied to the traction jack as it is, and the hydraulic pressure that has been limited to a certain set pressure by the relief valve is made larger than this set pressure. As a result, the sliding jack is contracted, whereby the slide device is pulled to the opposite side of the second direction of the heavy object, and the inclination is corrected.

In the method for moving a heavy article according to the present invention, the heavy article is placed on a slide device that movably supports the heavy article along a first direction and a second direction different from the first direction. A method of moving a heavy object that is pushed and moved in a direction of 1, wherein the inclination of the slide device is monitored, and when the slide device is inclined, a direction opposite to the second direction with respect to the slide device Supply tensile force.
More specifically, an endless track is provided, and a heavy object such as a bridge girder placed on the endless track is moved in the first direction, along the second direction intersecting the first direction. The heavy object is placed on a slide device that moves the heavy object placed on the endless track band provided along the second direction as the endless track band rotates . A method of moving a heavy object that is pushed and moved in the direction of the moving object, wherein the inclination of the slide device that occurs as the heavy object moves in the second direction is monitored, and the slide device is inclined In addition, a tensile force in a direction opposite to the second direction is supplied to the slide device.

  According to this method, when the slide device that movably supports the heavy load is tilted by being dragged by the heavy load moving along the second direction, the slide device is pulled in a direction opposite to the second direction. It is possible to correct the posture of the sliding device tilted by. Thereby, a heavy object such as a bridge girder can be safely supported and moved in an extremely stable state.

In the method of moving a heavy object according to the present invention, one end of a tow jack that contracts by supply of hydraulic pressure is connected to the slide device, and the other end of the tow jack is separated from the slide device in a direction opposite to the second direction . When the slide device is tilted, the hydraulic device is fixed to the heavy load at a position , and contracted to follow the movement of the heavy load along the second direction by supplying a hydraulic pressure with a constant set pressure to the tow jack. In addition, the hydraulic pressure supplied to the traction jack is set larger than the predetermined set pressure.

  According to this method, during normal movement in which the slide device is not inclined, the contraction of the traction jack can be made to follow the movement of the heavy object by supplying the hydraulic pressure with a constant set pressure. In addition, when the slide device is tilted, it is possible to correct the posture of the tilted slide device by contracting the traction jack greatly by supplying a hydraulic pressure larger than the set pressure and pulling the slide device in the opposite direction to the second direction. it can.

  According to the present invention, when a heavy object such as a bridge girder is rotated or laterally moved, the heavy object can be safely supported in an extremely stable state.

It is a block diagram explaining the heavy article mounting apparatus which concerns on one Embodiment of this invention. It is a perspective view explaining the structure of the slide apparatus shown in FIG. It is the perspective view which decomposed | disassembled a part of slide apparatus shown in FIG. It is sectional drawing of the slide apparatus shown in FIG. It is a block diagram explaining control of the heavy article mounting apparatus by the control apparatus shown in FIG. It is a block diagram explaining control of the heavy article mounting apparatus by the control apparatus shown in FIG. It is a top view which shows an example of the horizontal construction method using the heavy article mounting apparatus shown in FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a heavy load mounting device and a heavy load moving method according to the present invention will be described with reference to the drawings. In the present embodiment, description will be given of a side-by-side construction method in which a bridge girder spanned over a pier is rotated or laterally moved on a rail.

  As shown in FIG. 7, the heavy article mounting device 11 including the slide device 12 is mounted on the support C installed from the assembly yard (not shown) toward the pier A in order to bridge the bridge girder B to the pier A. It is used when the first rail 1 is laid and the bridge girder B is laterally moved to the pier A along the first rail 1 for installation. The slide device 12 is used in a state where the required number (two per rail in FIG. 7) is connected by the connecting rod D according to the width of the bridge beam B.

The slide device 12 is pin-coupled to the tip of a rod of a horizontal jack E made of a well-known hydraulic cylinder having a cylinder and a rod. The slide device 12 itself is connected to the pier A by repeated expansion and contraction of the rod by hydraulic pressure. Move towards.
Hereinafter, the direction in which the bridge beam B is moved from the assembly yard to the pier A is referred to as a first direction, and the bridge beam B is disposed on the first rail 1 while the bridge beam B is moved along the first direction. The direction in which the bridge beam B slides relative to the slide device 12 is referred to as a second direction.

  As shown in FIG. 1, the heavy article mounting device 11 includes a slide device 12, a traction device 13, a tilt sensor 14 provided on the slide device 12, and a control device 15. The slide device 12 is installed on the upper part of the first rail 1, and the bridge girder B is supported on the slide device 12 via the second rail 2.

  As shown in FIGS. 2 to 4, the slide device 12 includes a support base 21 disposed along the longitudinal direction of the first rail 1. A pair of guide portions 22 project downward from both side portions of both ends of the support base 21. The support base 21 is stably supported on the first rail 1 by the guide portion 22 engaging both side portions of the first rail 1.

  The support base 21 is provided with a reaction force beam 25 at an upper portion thereof, and the reaction force beam 25 has a heavy material feeding mechanism 27 at the center thereof. And the 2nd rail 2 and the bridge girder B which are heavy objects are mounted in this heavy material feed mechanism 27. FIG.

  The reaction beam 25 is provided with jack portions 29 on both sides of the heavy load feeding mechanism 27, and the reaction beam 25 is raised and lowered by these jack portions 29. The height of the reaction beam 25 can be adjusted by these jack portions 29.

  The heavy article feed mechanism 27 is disposed so as to be orthogonal to the support base 21 and the reaction beam 25. The heavy load feeding mechanism 27 is supported so as to be turnable by about 30 ° in the left-right direction about the vertical center axis of the reaction beam 25 and is turned in accordance with the moving direction of the bridge beam B.

  The heavy article feed mechanism 27 includes a feed mechanism main body 31 and an endless track band 32. The endless track 32 is composed of an endless crawler in which a plurality of crawler plates 33 are connected, and is wound around the feed mechanism main body 31 in the vertical direction. The feed mechanism main body 31 is provided with a pair of rollers 35 at both ends thereof. The feed mechanism main body 31 includes a pair of elevating parts 41 arranged in two rows at the upper part thereof. The elevating unit 41 includes a plurality of vertical jacks 42, and a push-up plate 43 made of an iron plate and a low friction plate 44 made of a synthetic resin are sequentially provided on the upper portion of the arrangement of the vertical jacks 42. The low friction plate 44 has a small friction coefficient and excellent wear resistance, for example, Teflon (in order to reduce friction with the endless track band 32 receiving the load from the bridge beam B and the second rail 2 as much as possible. (Registered trademark).

  In this heavy load feeding mechanism 27, by supplying hydraulic pressure to the vertical jack 42, the load from the bridge beam B and the second rail 2 received by the endless track band 32 can be uniformly supported from below.

  As shown in FIG. 1, the traction device 13 includes a traction jack 51. The traction jack 51 includes a cylinder 52 and a rod 53 that is expanded and contracted with respect to the cylinder 52 by hydraulic pressure. The end of the traction jack 51 on the cylinder 52 side is connected to a connecting portion 55, and the connecting portion 55 is fixed to the heavy load feeding mechanism 27 of the slide device 12. Moreover, the clamp 57 is provided in the edge part by the side of the rod 53 of the traction jack 51, This clamp 57 clamps the lower part of the 2nd rail 2 in which the bridge beam B is mounted.

  In addition, a hydraulic pressure supply pipe 61 is connected to the front end side of the cylinder 52 of the traction jack 51, and a delivery pipe 62 is connected to the rear end side. The hydraulic supply pipe 61 is connected to a hydraulic pump 64, and hydraulic oil is supplied from the hydraulic pump 64 to the tip side of the cylinder 52. When hydraulic oil is supplied to the tip side of the cylinder 52 in this way, the rod 53 is drawn into the cylinder 52 by the hydraulic pressure. At this time, the hydraulic oil in the cylinder 52 is sent from the rear end side of the cylinder 52 to the delivery pipe 62 and returned to the tank 60.

  A hydraulic pipe 66 connected to the tank 65 is connected to the hydraulic supply pipe 61, and an electromagnetic valve 67 and a relief valve 68 are provided in this hydraulic pipe 66 in this order. The electromagnetic valve 67 is a normally open valve in which the flow path is opened in the OFF state. When the electromagnetic valve 67 is turned on by power supply, the flow path is closed. The relief valve 68 is opened when the hydraulic pressure reaches a predetermined operating pressure.

  The hydraulic pressure supply pipe 61 is provided with a hydraulic pressure gauge 69, and this hydraulic pressure gauge 69 detects the hydraulic pressure supplied to the cylinder 52 of the traction jack 51.

  The tilt sensor 14 is attached to the support base 21 of the slide device 12, detects the tilt of the slide device 12 along the second direction, and outputs a detection signal thereof. As the inclination sensor 14, for example, a differential transformer type is preferably used. The tilt sensor 14 is connected to the control device 15, and a detection signal from the tilt sensor 14 is transmitted to the control device 15.

  The control device 15 is connected to the hydraulic pump 64 and the electromagnetic valve 67, and controls driving of the hydraulic pump 64 and the electromagnetic valve 67.

Next, a preparatory method using the heavy load mounting device 11 will be described.
That is, in FIG. 7, the bridge girder B placed on the slide device 12 of the heavy load mounting device 11 via the second rail 2 toward the planned installation location indicated by the two-dot chain line on the pier A, An example of a case of lateral movement in the first direction will be described.

  First, the clamp 57 of the traction device 13 is clamped to the lower portion of the second rail 2 while the slide device 12 of the heavy load mounting device 11 is supported on the upper portion of the first rail 1. Then, the slide device 12 is pressed toward the planned installation location with the horizontal jack E. Then, the bridge girder B moves along the first direction.

  At this time, the bridge girder B moves smoothly in the second direction along with the rotation of the endless track band 32 while moving laterally in the first direction along with the movement of the slide device 12 itself by the horizontal jack E ( Slide). At this time, the load applied to the endless track band 32 is received by the feed mechanism main body 31 via the low friction plate 44. Therefore, the endless track band 32 of the slide device 12 rotates smoothly while receiving the load of the second rail 2 and the bridge beam B.

  Further, in the present embodiment, as the slide device 12 is moved by the horizontal jack E, the control device 15 drives the hydraulic pump 64 to supply hydraulic pressure to the cylinder 52 of the traction jack 51. Here, the hydraulic pressure of the hydraulic pump 64 is adjusted to the operating pressure by the relief valve 68. Therefore, the relief valve 68 is operated by the hydraulic oil supplied to the hydraulic pressure supply pipe 61, and the hydraulic oil is returned to the tank 65.

  As a result, the set pressure of the relief valve 68 always acts on the cylinder 52, so that the rod 53 is drawn into the cylinder 52 as the bridge girder 2 moves, and the rod 53 and the clamp 57 move following the movement of the bridge girder 2. Will be. The tensile force of the rod 53 at the traction jack 51 set by the set pressure of the relief valve 68 is the frictional force between the low friction plate 44 of the slide device 12 and the endless track band 32 (friction force = the endless track band 32). It is set to be smaller than (vertical load × friction coefficient of the low friction plate 44).

  By the way, the low friction plate 44 and the endless track band 32 of the slide device 12 are caused by the endurance of the endless track band 32 into the low friction plate 44 at the start of the movement of the bridge girder 2 or wear due to the use of the low friction plate 44. Friction may increase. Then, the endless track band 32 may not be smoothly rotated due to the increase of the frictional force. In such a case, as shown in FIG. 5, the slide device 12 is dragged in the second direction to cause an inclination, and the support of the second rail 2 and the bridge beam B may be unstable. Therefore, in the present embodiment, when the control device 15 determines that a predetermined amount of tilt (for example, about 3 °) has occurred in the slide device 12, tilt correction control is performed to correct the tilt of the slide device 12. Stabilize support of bridge girder 2.

Next, the inclination correction control by the control device 15 will be described.
When the detected value from the inclination sensor 14 provided in the slide device 12 exceeds a predetermined reference value, the control device 15 determines that the slide device 12 is inclined more than the reference as shown in FIG. Start correction control. The tilt sensor 14 is zero in a flat state where the slide device 12 is not tilted.

  When the inclination correction control is started, the control device 15 supplies power to the electromagnetic valve 67 and turns on the electromagnetic valve 67. Then, as shown in FIG. 6, the electromagnetic valve 67 is activated and the flow path of the electromagnetic valve 67 is closed. As a result, the hydraulic oil supplied from the hydraulic pump 64 to the hydraulic supply pipe 61 is blocked from flowing out to the relief valve 68.

  Thereby, the hydraulic pressure of the hydraulic oil from the hydraulic pump 64 is supplied to the cylinder 52 of the traction jack 51 without being released by the relief valve 68. Therefore, in the traction jack 51, the rod 53 is pulled into the cylinder 52 with a larger tensile force than in the above-described following operation. As a result, the inclination of the slide device 12 is corrected by pulling the heavy material feed mechanism 27 on the slide device 12 in the direction opposite to the second direction.

  When the detected value from the tilt sensor 14 becomes zero, which is smaller than the reference value, by correcting the tilt of the slide device 12, the control device 15 ends the tilt correction control of the slide device 12.

  When the inclination correction control is finished, the control device 15 stops the power supply to the electromagnetic valve 67 and turns off the electromagnetic valve 67. Then, as shown in FIG. 1, the electromagnetic valve 67 is deactivated, and the flow path of the electromagnetic valve 67 is opened. As a result, the hydraulic oil supplied from the hydraulic pump 64 to the hydraulic supply pipe 61 is sent to the relief valve 68 via the electromagnetic valve 67. As a result, a constant hydraulic pressure corresponding to the set pressure of the relief valve 68 is always supplied to the cylinder 52, and the rod 53 is drawn into the cylinder 52 as the second rail 2 and bridge girder B move, and the rod 53 and clamp 57 Is tracking control that moves following the movement of the bridge girder B.

  As described above, according to the present embodiment, during normal movement in which the slide device 12 is not inclined, the hydraulic pressure is maintained at a constant set pressure by the relief valve 68 and the contraction of the traction jack 51 is moved by the bridge girder 2. Can be followed. When the slide device 12 is tilted, the hydraulic pressure from the hydraulic pump 64 is supplied to the traction jack 51 as it is, and the hydraulic pressure that has been limited to a certain set pressure by the relief valve 68 is made larger than the set pressure. Thereby, when the tow jack 51 contracts, the slide device 12 is pulled to the opposite side to the second direction, and the inclination is corrected.

  As described above, when the bridge girder B and the second rail 2 that are heavy objects are moved, if the slide device 12 that supports the bridge girder B and the second rail 2 movably supports the control device 15, By driving the traction device 13, the tilt of the slide device 12 can be automatically corrected. Thereby, a heavy object such as the bridge girder B can be safely supported and moved in a very stable state.

  In the above embodiment, the case where the bridge girder B, which is a heavy object, is moved on a pair of rails that are not parallel to each other and installed on the pier A has been described as an example. . Of course, the heavy load mounting device 11 according to the present embodiment can also be used when moving while supporting a heavy load other than the bridge beam B.

A ... Bridge pier, B ... Bridge girder (heavy object), 1 ... first rail, 2 ... second rail (heavy object), 11 ... heavy object mounting device, 12 ... slide device, 13 ... traction device, 14 ... tilt Sensor, 15 ... Control device, 51 ... Traction jack, 57 ... Clamp, 64 ... Hydraulic pump, 67 ... Solenoid valve, 68 ... Relief valve

Claims (3)

A heavy load mounting device used when a heavy load such as a bridge girder is bridged on a bridge pier,
On the endless track zone provided along the second direction that intersects the first direction while moving the heavy object placed on the endless track zone in the first direction. A slide device that moves the heavy object placed on the second track along the rotation of the endless track ,
An inclination sensor for detecting an inclination of the slide device caused by the heavy object moving along the second direction ;
A traction device that pulls the slide device in a direction opposite to the second direction;
A control device that causes the sliding device to generate a tensile force in a direction opposite to the second direction when the sliding device is determined to be tilted from a detection value from the tilt sensor; A heavy load mounting device characterized by that. It is a heavy article mounting apparatus of Claim 1, Comprising:
The traction device includes a traction jack having one end connected to the slide device;
A clamp for fixing the other end of the traction jack to the heavy load at a position spaced apart from the slide device in a direction opposite to the second direction;
A hydraulic pump that supplies hydraulic pressure to the tow jack to contract the tow jack;
A relief valve that keeps the hydraulic pressure from the hydraulic pump at a constant set pressure and contracts the traction jack so as to follow the movement of the heavy object along the second direction;
An electromagnetic valve provided in a hydraulic path connected to the relief valve,
When the control device determines that the slide device is tilted based on a detection value from the tilt sensor, the control device operates the electromagnetic valve to shut off the hydraulic path, so that the pressure is higher than a predetermined set pressure by the relief valve. A heavy article mounting device that supplies a large hydraulic pressure to the towing jack. The infinite track zone is provided, and the infinite track provided along the second direction intersecting the first direction while moving a heavy object such as a bridge girder placed on the endless track zone in the first direction. The heavy object placed on the orbital belt is placed on a slide device that moves along the second direction as the endless orbital belt rotates, and is pushed in the first direction. A method of moving a heavy object to be moved,
The tilt of the slide device generated as the heavy object moves in the second direction is monitored, and when the slide device is tilted, the slide device is in a direction opposite to the second direction. To supply tensile force,
One end of a traction jack that contracts by supplying hydraulic pressure is connected to the slide device,
Fixing the other end of the tow jack to the heavy object at a position spaced apart from the slide device in the direction opposite to the second direction;
Hydraulic pressure to be supplied to the traction jack when the sliding device is tilted by supplying a hydraulic pressure of a constant set pressure to the traction jack so as to follow the movement of the heavy object along the second direction. Is set to be larger than the predetermined set pressure.

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