JP2019214459A - Movable type portal crane system for inclined plane - Google Patents

Abstract

To provide a movable type portal crane system that can be safely used even on an inclined plane having gradient.SOLUTION: A movable type portal crane system 10 includes a movable type portal crane 11 that has at least two leg parts 12 each having a traveling wheel 28 and moves on two parallel traveling rails 26 extended in one side and the other side. The movable type portal crane system includes: two traveling chains 30 which are parallel to each rail in the vicinity of the traveling rails 26 and laid over the whole length of a movable range of the portal crane 11; traveling sprockets 48, at least one of which is fixedly provided on each of one side and the other side of the leg parts 12 traveling on the two traveling rails and which mesh with the respective traveling chains 30 to rotate; and a traveling motor 42 which supplies the rotation force to the traveling sprockets 48.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a portal crane that suspends and unloads equipment and the like, and more particularly to a movable portal crane system that includes a portal crane that has wheels and moves on rails.

  For example, a portal crane is installed in a factory building for hanging down, carrying in, moving, and the like equipment and facilities. The portal crane includes a hoist, a winch, a chain block, and the like for suspending equipment and the like at an upper portion, and is configured so that the entire crane can move on, for example, rails. In the case of a small portal crane, it is possible to move it while pushing a hand on a rail laid on the floor or the like while hanging a load.

  In the field, for example, a large portal crane is installed on a quay, and is used to carry and move heavy objects and the like from ships. Large-sized portal cranes include those configured to apply rotational force to wheels on rails and move them, and those equipped with an electric traveling cart below legs for movement.

  In general, portal cranes are used for heavy cargo handling, so they are usually configured to move a fixed distance in a flat place. Was not suitable. When used on an inclined surface, for example, the rails and wheels slip, causing the suspended equipment and the like to collapse and fall, resulting in a very dangerous state. On a downhill slope, the portal crane may run away.

  It is a basic principle that even when moving on a specified rail, it is linear. Further, Patent Literature 1 discloses a portal crane that can safely travel even if there is a curved portion on a rail, and Patent Literature 2 discloses a crane using a rack and a pinion for moving a crane leg. And the like.

Japanese Patent No. 511546 JP 2001-146383 A

  The portal crane disclosed in Patent Literature 1 has a configuration in which a bogie having rails is connected to four columns (legs), and the bogie and the columns (legs) are rotatable with respect to each other. Thus, even when the rail has a curved portion, the bogie and the column rotate with respect to each other at the curved portion, so that the portal crane can be moved safely and smoothly.

  The general-purpose lateral movement device for legs such as a crane disclosed in Patent Literature 2 is not for moving the crane during use, but for moving between crane sites. The movement is performed by a pinion connected to the wheels and a rack fixed to a side surface of the rail. The rail has a predetermined short length, not the entire length of the travel distance, and the leg is provided with a contact leg that descends and rises. First, the contact leg is lowered to lift the rail. Move forward in the direction of travel, then raise the grounding leg, lower the rail to the ground, and load the rail to move the leg. The crane is moved by repeating this operation.

  As described above, with regard to the movement of the portal crane, improvements can be seen when the rail has a curve or when it is moved to a different site, but it can be used constantly on a sloping slope, that is, the weight of equipment etc. A portal crane that can safely move on an inclined surface while lifting an object has not been proposed.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a movable portal crane system that can be used safely even on a sloped surface.

In order to achieve the above object, a mobile portal crane system according to claim 1 comprises:
Mobile portal crane having at least two legs each having a traveling wheel and having a movable portal crane moving on two extended parallel running rails on one side and the other side. In the system,
Two traveling chains laid in parallel with each of the rails in the vicinity of the traveling rails and over the entire moving range of the portal crane; and the legs traveling on the two traveling rails. A traveling sprocket that is fixedly installed at least one each on one side and the other side of the section and that rotates while meshing with the traveling chain, and a traveling motor that supplies a rotational force to the traveling sprocket. It is characterized by the following.

  With this configuration, the portal crane receives a load from the traveling wheels and applies a rotational force to the traveling sprocket from the traveling motor, and the traveling sprocket moves while meshing with the traveling chain. That is, unlike the situation in which the propulsion force for movement is obtained from the traveling wheels under load, the sliding of the traveling wheels on the traveling route is eliminated. For example, the force of a portal crane, which lifts heavy objects such as equipment, to slip down on an inclined surface in the inclined direction can be reliably suppressed by the teeth of the traveling sprocket biting into the holes of the traveling chain. Similarly, when climbing on an inclined surface, the teeth of the traveling proket bite into the holes of the traveling chain, so that it is possible to move safely without causing a slip or the like.

The mobile portal crane system according to claim 2 is the mobile portal crane system according to claim 1,
At least four legs are provided, and the traveling sprocket and the traveling motor are provided on each of the legs.

  With this configuration, the traveling motor and the traveling sprocket are attached to the four corners of the portal crane, respectively, so that the movement of the portal crane is performed independently at the four corners as in a so-called four-wheel drive of an automobile. That is, even when a load is not evenly applied to the four legs of the portal crane, the traveling sprocket and the traveling chain are engaged with each leg independently of the other legs. Therefore, the safe movement of the portal crane without slipping is ensured.

The mobile portal crane system according to claim 3 is the mobile portal crane system according to claim 1 or 2,
The traveling wheel is provided with a brake device.

  With this configuration, an abnormality in meshing between the traveling sprocket and the traveling chain during movement of the portal crane, for example, when a foreign object falls on the traveling chain and meshing between the traveling chain and the traveling sprocket is not performed properly. For example, the movement of the portal crane can be stopped by the brake device.

  According to the movable portal crane system of the present invention, the portal crane receives a load on the traveling wheels while applying rotational force to the traveling sprocket from the traveling motor, and the traveling sprocket is connected to the traveling chain. It moves while meshing. Therefore, it is possible to accurately suppress slippage of the traveling wheels on the traveling route, and it is possible to safely use the portal crane even on a sloped slope, for example, in a tunnel with a slope. .

FIG. 1 is a schematic front view of an entire movable portal crane system according to an embodiment of the movable portal crane system of the present invention. FIG. 2 is a schematic side view of the entire mobile portal crane system of FIG. 1. It is explanatory drawing which uses the mobile portal crane system of FIG. 1 in a tunnel. FIG. 2 is a schematic explanatory view of a traveling rail and a traveling chain of the mobile portal crane system of FIG. 1. FIG. 2 is a schematic side view of a drive unit of the mobile portal crane system of FIG. 1. It is a schematic front view of the drive part of the mobile portal crane system of FIG. FIG. 2 is a schematic plan view of a drive unit of the mobile portal crane system of FIG. 1. FIG. 2 is a schematic side view of a brake device of the mobile portal crane system of FIG. 1. FIG. 2 is a schematic front view of a brake device of the mobile portal crane system of FIG. 1.

  Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic front view of the entire movable portal crane system according to the embodiment of the movable portal crane system of the present invention. FIG. 2 is a schematic side view of the entire mobile portal crane system of the present invention. FIG. 3 is an explanatory diagram showing the use of the mobile portal crane system of the present invention in a tunnel. The site where the mobile portal crane system is used is in a tunnel with a slope of 1/100 to 5/100 (1 to 5 m head with a stroke of 100 m). In FIG. 2, the right side is the traveling direction (uphill). It is.

  The portal crane 11 of the mobile portal crane system 10 according to the present embodiment has four legs 12, and has a substantially square shape when viewed from the front and a substantially trapezoidal shape when viewed from the side. The front and rear legs 12, 12 as viewed from the side have a base connected to the saddle 14, and an upper part connected by an upper member 18, leg joints 20, and the like. A girder (horizontal girder) 22 is arranged at the upper part, and a hoist 24 for lifting equipment and the like is provided. Hoist 24 is configured to move along girder 22. In addition, the portal crane 11 is provided with a ramp, a check table, a cable drum, and the like as necessary, but is omitted in the drawing for simplicity.

  The saddle 14 connecting the front and rear legs 12, 12 is formed in a substantially rectangular shape using, for example, a channel steel, and the saddle 14 includes a drive unit 40, a brake device 52, running wheels 28, and the like described below. Is attached. In addition, a slope adjustment base 16 is connected to a mounting portion of the leg portion 12 and the saddle 14 for height adjustment. Even when working on a sloped surface, the upper member 18 is adjusted so as to be horizontal to the ground. This is for safely using the hoist 24 and the like.

  As shown in FIG. 3, the portal crane 11 installed in the tunnel 31 lifts equipment and the like by a hoist 24 from a large truck 32 capable of traveling in the tunnel 31 at a predetermined position in the tunnel 31. Cure within.

  FIG. 4 is a schematic explanatory view of the traveling rail 26 and the traveling chain 30 according to the embodiment of the movable portal crane system of the present invention. The traveling rail 26 on which the portal crane 11 travels is fixed on the foundation H steel 32 and has a substantially square cross section. The two traveling rails 26 are laid in the tunnel 31 in parallel with each other at a predetermined interval in a direction orthogonal to the moving direction of the portal crane 11 and over a travel distance of about 100 m of the portal crane 11. Have been.

  Near the inside of the traveling rail 26, a traveling chain 30 is laid in parallel with the traveling rail 26 as shown. In the present embodiment, the traveling chain 30 uses a roller chain and is laid over the entire length of the movable range of the portal crane 11. In the work of laying the traveling chain 30, for example, an H steel 36 is arranged in parallel with the base H steel 32 on a steel material 34 welded to the base H steel 32 at a predetermined interval, and attached to the H steel 36. A traveling sprocket, which will be described later, meshes with the traveling chain 30, and is firmly fixed on the H-steel 36 so that the traveling chain 30 does not move even if a force is applied before and after the laying direction of the traveling chain 30. is set up.

  The traveling wheel 28 is rotatably attached to the saddle 14 at a lower portion of each leg 12. A load such as a load of the portal crane 11 and a suspended load is applied to each traveling wheel 28. As will be understood from FIG. 6, which will be described later, the traveling wheels 28 have substantially the same thickness as the width of the rail 26, and have flanges 29 formed on both sides so as to sandwich the rail 26.

  A drive section 40 is attached to each of the front and rear ends of the saddle 14. Since the legs 12 are located at the front end and the rear end of the saddle 14, it can be said that the driving units 40 are attached near the bases of the legs 12, respectively. FIG. 5 is a schematic side view of the driving unit 40. FIG. 6 is a schematic front view of the driving unit 40, and FIG. 7 is a schematic top view of the driving unit 40.

  The drive section 40 is a mechanism for applying a rotational force to the traveling sprocket 48, and includes a base 15 extending and attached to the saddle 14, a traveling motor 42, a transmission chain 44, a transmission shaft 46, and the like. A traveling motor 42 is mounted on the base 15, and a transmission shaft 46 is mounted on a lower portion. The transmission shaft portion 46 is rotatably held through a lower portion of the base 15 in a direction (width direction) orthogonal to the traveling rail 26, and a sprocket 47 to which one end receives a rotational force from the traveling motor 42. At the other end, a traveling sprocket 48 meshing with the traveling chain 30 is attached.

  A sprocket 47 is also attached to the rotating shaft of the traveling motor 42. The sprocket 47 and the sprocket 47 attached to the transmission shaft 46 are connected by a transmission chain 44, and the rotational force of the traveling motor 42 is applied to the traveling sprocket. 48 to be driven. By adopting the configuration of transmitting the moving force by the roller chain and the sprocket as described above, the stable and stable movement of the portal crane without slip is achieved.

  Therefore, the driving sprocket 48 rotates while meshing with the traveling chain 30 by the driving force of the traveling motor 42, and pushes the portal crane 11 in the traveling direction. The four driving motors 42 are driven synchronously by electric power, and appropriate torque is generated.

  Looseness of the transmission chain 44 for transmitting the power of the traveling motor 42 can be adjusted by shifting the traveling motor 42 to the rear of the base 15 (to the left in FIG. 5).

  As described above, the traveling wheel 28 has substantially the same thickness as the lateral width of the rail 26, the flanges 29 are formed on both sides so as to sandwich the rail 26, and the vicinity of the saddle 14 to which the traveling wheel 28 is attached. , A pair of side rollers 49 is attached to the saddle 14 so as to sandwich the traveling rail 26 from both sides. Thereby, rattling to the left and right (in a direction orthogonal to the moving direction) during the movement of the portal crane 11 is suppressed, which contributes to the stable movement of the portal crane 11.

  When the hoist 24 that moves along the girder 22 lifts a heavy object such as equipment and moves out of the portal crane 11 to the extent that the hoist 24 moves laterally, the saddle 14 on the opposite side that is far away from the hoist 24 ( Usually, it is on the wall side of the tunnel 31). In order to prevent this, a lifting prevention roller 50 is attached to the saddle 14.

  When an abnormality occurs while the portal crane 11 is traveling, an emergency brake is applied by the brake device 52. The abnormality during traveling corresponds to, for example, a drop of a suspended load, an abnormal meshing between the traveling sprocket 48 and the traveling chain 30, a failure of the traveling motor 42, and the like. When such an abnormality occurs, the brake device 52 is actuated immediately to apply a brake to the portal crane 11, and the portal crane 11 stops.

  FIG. 7 is a schematic side view of the brake device 52, and FIG. 9 is a schematic front view of the brake device 52. The brake devices 52 are provided on the two rear traveling wheels 28, respectively. The brake device 52 includes a brake drum 54, a brake shoe 62, a sprocket 56, and a transmission chain 60. A sprocket 56 smaller than the diameter of the traveling wheel 28 is attached to the traveling wheel 28. A brake drum 54 is arranged near an upper portion of the saddle 14 to which the rear traveling wheel 28 is attached. A sprocket 56 is attached to a rotation shaft 58 of the brake drum 54, and the sprocket 56 and the sprocket 56 attached to the traveling wheels 28 are connected by a transmission chain 60.

  The traveling wheel 28 and the brake drum 54 are each provided with a sprocket 56, and the respective sprockets 56 are connected by a transmission chain 60. Therefore, during the movement of the portal crane 11, the traveling wheel 28 is rotated. The brake drum 54 also rotates. If an abnormality occurs during the movement of the portal crane 11, the brake device 52 is configured to apply the brake shoe 62 to the brake drum 54 and stop the rotation of the traveling wheel 28.

  The slack of the transmission chain 60 of the brake device 52 can be adjusted by moving the brake device 52 on the saddle 14 in the traveling direction, and in FIG.

  According to the mobile portal crane system 10 of the present embodiment, the transport of the portal crane 11 is performed by the engagement of the travel sprocket 48 of the drive unit 40 provided on the four legs 12 with the travel chain 30. As a result, slipping of the traveling wheels on the traveling route can be accurately suppressed, and it is possible to safely use the vehicle even on a sloped surface. That is, since the drive units 40 are provided independently at the four corners of the portal crane 11, the movement is like a so-called four-wheel drive of a car, so that stable and reliable movement is possible. In addition, when a trouble occurs during the movement of the portal crane 11, for example, a problem occurs in the engagement between the traveling sprocket 48 and the traveling chain 30, two brake devices 52 provided on the rear wheels of the portal crane 11. As a result, the portal crane 11 is stopped urgently. Therefore, it has become possible to safely use the portal crane 11 in a tunnel with a slope.

  Note that the present invention is not limited to the configuration described in the above embodiment, and various changes can be made within the scope of the present invention. For example, in the present embodiment, an example in which the roller chain is used as a traveling chain has been described, but any other configuration is possible as long as the configuration can mesh with the sprocket and continuously receive the force from the sprocket in a fixed state. Can be used.

  In addition, the configuration is such that the vehicle travels on the two traveling rails with four legs (two on one side and the other side), but the invention is not limited to this. A configuration is also applicable. Also, an example is shown in which one traveling wheel on the rail is provided for each leg, but a plurality of wheels may be provided for each. Further, the brake devices are provided at two places on the rear wheel, but may be provided at four places.

  Further, the saddle 14 is formed in a substantially rectangular shape by using a channel steel, but may have the same function by using other steel materials.

10 Mobile portal crane system 11 Portal crane
12 Leg 14 Saddle 16 Gradient adjustment stand 18 Upper member 20 Leg joint 22 Garter material 24 Hoist 26 Running rail 28 Running wheel 30 Running chain
32 Basic H steel 36 H steel 40 Drive unit 42 Running motor 44 Transmission chain 46 Rotating shaft 47 Sprocket 48 Running sprocket 49 Side roller 50 Lifting prevention roller
52 Brake device 54 Brake drum 56 Sprocket 58 Rotary shaft 60 Transmission chain 62 Brake shoe

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portal crane for lifting and lowering equipment and the like, and more particularly to a movable portal crane system for a slope provided with a portal crane having wheels and moving on rails.

  For example, a portal crane is installed in a factory building for hanging down, carrying in, moving, and the like equipment and facilities. The portal crane includes a hoist, a winch, a chain block, and the like for suspending equipment and the like at an upper portion, and is configured so that the entire crane can move on, for example, rails. In the case of a small portal crane, it is possible to move it while pushing a hand on a rail laid on the floor or the like while hanging a load.

  In the field, for example, a large portal crane is installed on a quay, and is used to carry and move heavy objects and the like from ships. Large-sized portal cranes include those configured to apply rotational force to wheels on rails and move them, and those equipped with an electric traveling cart below legs for movement.

  In general, portal cranes are used for heavy cargo handling, so they are usually configured to move a fixed distance in a flat place. Was not suitable. When used on an inclined surface, for example, the rails and wheels slip, causing the suspended equipment and the like to collapse and fall, resulting in a very dangerous state. On a downhill slope, the portal crane may run away.

  It is a basic principle that even when moving on a specified rail, it is linear. Further, Patent Literature 1 discloses a portal crane that can safely travel even if there is a curved portion on a rail, and Patent Literature 2 discloses a crane using a rack and a pinion for moving a crane leg. And the like.

Japanese Patent No. 511546 JP 2001-146383 A

  The portal crane disclosed in Patent Literature 1 has a configuration in which a bogie having rails is connected to four columns (legs), and the bogie and the columns (legs) are rotatable with respect to each other. Thus, even when the rail has a curved portion, the bogie and the column rotate with respect to each other at the curved portion, so that the portal crane can be moved safely and smoothly.

  The general-purpose lateral movement device for legs such as a crane disclosed in Patent Literature 2 is not for moving the crane during use, but for moving between crane sites. The movement is performed by a pinion connected to the wheels and a rack fixed to a side surface of the rail. The rail has a predetermined short length, not the entire length of the travel distance, and the leg is provided with a contact leg that descends and rises. First, the contact leg is lowered to lift the rail. Move forward in the direction of travel, then raise the grounding leg, lower the rail to the ground, and load the rail to move the leg. The crane is moved by repeating this operation.

  As described above, with regard to the movement of the portal crane, improvements can be seen when the rail has a curve or when it is moved to a different site, but it can be used constantly on a sloping slope, that is, the weight of equipment etc. A portal crane that can safely move on an inclined surface while lifting an object has not been proposed.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a movable portal crane system for inclined surfaces that can be safely used even on inclined surfaces .

In order to achieve the above object, a movable portal crane system for inclined surfaces according to claim 1,
Running a leg portion having a traveling wheel which travels one side and the other side of the two upper parallel running rails each, on the other hand between the legs running on the side of the rail the other side rail A mobile portal crane system comprising a mobile portal crane having legs and upper members connecting the legs at an upper part thereof , wherein the inclined surface is installed on an inclined surface having a gradient in a direction in which the rail extends. in use mobile gantry crane system,
The two legs are arranged on the one-side rail and the other-side rail , respectively, and are parallel to the one-side rail and the other-side rail near the traveling rail , respectively, and the moving range of the portal crane. 2 and traveling roller chain laid over the entire length of said one by one to as least each of the legs which runs two traveling rails fixedly mounted, respectively to said traction roller chain a traveling sprocket rotating in mesh, and traction motor for the gate-shaped crane by supplying a rotational force to the driving sprocket provided on the gantry crane travels on the rail, provided in the respective leg And a height adjusting means for keeping the upper member horizontal .

With this configuration, the portal crane receives a load on the traveling wheels and applies a rotational force to the traveling sprocket from the traveling motor, and the traveling sprocket moves while meshing with the traveling roller chain. That is, unlike the situation in which the propulsion force for movement is obtained from the traveling wheels under load, the sliding of the traveling wheels on the traveling route is eliminated. For example, the force of a portal crane that lifts heavy objects such as equipment to try to slide down on an inclined surface in an inclined direction can be reliably suppressed by the teeth of the traveling sprocket biting into the holes of the traveling roller chain. Similarly, when climbing on an inclined surface, the teeth of the traveling proket bite into the holes of the traveling roller chain, so that it is possible to move safely without causing a slip or the like.
Furthermore, the height adjustment means for leveling the upper member allows the upper member to be kept horizontal even when working on an inclined surface having a gradient in the rail extension direction, and the hoist or the like can be used safely. Can be.

The movable portal crane system for inclined surfaces according to claim 2 is the movable portal crane system for inclined surfaces according to claim 1,
Before SL traction sprocket and the traction motor is characterized in that provided on each of the legs.

  With this configuration, the traveling motor and the traveling sprocket are attached to the four corners of the portal crane, respectively, so that the movement of the portal crane is performed independently at the four corners as in a so-called four-wheel drive of an automobile. That is, even when a load is not evenly applied to the four legs of the portal crane, the traveling sprocket and the traveling chain are engaged with each leg independently of the other legs. Therefore, the safe movement of the portal crane without slipping is ensured.

Mobile gantry crane system for the inclined surface according to claim 3, in claim 1 or 2 inclined surface for moving gantry crane system according to,
The traveling wheel is provided with a brake device.

With this configuration, the abnormality of the meshing of the driving sprocket and the running roller chain during the movement of the gantry crane, for example, foreign matter meshing of the driving sprocket and the running roller chain fall is performed successfully on a traveling roller chain In the case where there is not, for example, the movement of the portal crane can be stopped by the brake device.

According to the movable portal crane system for an inclined surface of the present invention, the portal crane receives a load on the traveling wheels while applying rotational force to the traveling sprocket from the traveling motor, and the traveling sprocket travels. It moves while meshing with the roller chain. Therefore, it is possible to accurately suppress slippage of the traveling wheels on the traveling route, and it is possible to safely use the portal crane even on a sloped slope, for example, in a tunnel with a slope. .

FIG. 1 is a schematic front view of an entire movable portal crane system for inclined surfaces according to an embodiment of a movable portal crane system for inclined surfaces of the present invention. FIG. 2 is a schematic side view of the entire movable portal crane system for an inclined surface in FIG. 1. It is explanatory drawing which uses the movable portal crane system for inclined surfaces of FIG. 1 in a tunnel. FIG. 2 is a schematic explanatory view of a traveling rail and a traveling chain of the movable portal crane system for an inclined surface in FIG. 1. It is a schematic side view of the drive part of the movable portal crane system for inclined surfaces of FIG. It is a schematic front view of the drive part of the movable portal crane system for inclined surfaces of FIG. FIG. 2 is a schematic plan view of a drive unit of the movable portal crane system for an inclined surface in FIG. 1. FIG. 2 is a schematic side view of a brake device of the movable portal crane system for an inclined surface in FIG. 1. FIG. 2 is a schematic front view of a brake device of the movable portal crane system for an inclined surface in FIG. 1.

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic front view of an entire movable portal crane system for inclined surfaces according to an embodiment of the movable portal crane system for inclined surfaces of the present invention. FIG. 2 is a schematic side view of the entire movable portal crane system for inclined surfaces according to the present invention. FIG. 3 is an explanatory view showing the use of the movable portal crane system for inclined surfaces according to the present invention in a tunnel. The site where the mobile portal crane system for inclined surfaces is used is in a tunnel with a slope of 1/100 to 5/100 (a drop of 1 to 5 m at a stroke of 100 m), and in FIG. (Uphill).

The portal crane 11 of the movable portal crane system 10 for a slope according to the present embodiment has four legs 12 and has a substantially square shape when viewed from the front and a substantially trapezoidal shape when viewed from the side. The front and rear legs 12, 12 as viewed from the side have a base connected to the saddle 14, and an upper part connected by an upper member 18, leg joints 20, and the like. A girder (horizontal girder) 22 is arranged at the upper part, and a hoist 24 for lifting equipment and the like is provided. Hoist 24 is configured to move along girder 22. In addition, the portal crane 11 is provided with a ramp, a check table, a cable drum, and the like as necessary, but is omitted in the drawing for simplicity.

The saddle 14 connecting the front and rear legs 12, 12 is formed in a substantially rectangular shape using, for example, a channel steel, and the saddle 14 includes a drive unit 40, a brake device 52, running wheels 28, and the like described below. Is attached. In addition, a slope adjustment base 16 is connected to a mounting portion of the leg portion 12 and the saddle 14 for height adjustment. Even when working with inclined surfaces with a slope is adjusted so that the top member 18 is horizontal. This is for safely using the hoist 24 and the like.

  As shown in FIG. 3, the portal crane 11 installed in the tunnel 31 lifts equipment and the like by a hoist 24 from a large truck 32 capable of traveling in the tunnel 31 at a predetermined position in the tunnel 31. Cure within.

FIG. 4 is a schematic explanatory view of a traveling rail 26 and a traveling roller chain 30 according to the embodiment of the movable portal crane system for inclined surfaces of the present invention. The traveling rail 26 on which the portal crane 11 travels is fixed on the foundation H steel 32 and has a substantially square cross section. The two traveling rails 26 are laid in the tunnel 31 in parallel with each other at a predetermined interval in a direction orthogonal to the moving direction of the portal crane 11 and over a travel distance of about 100 m of the portal crane 11. ing.

Near the inside of the running rail 26, a running roller chain 30 is laid in parallel with the running rail 26 as shown in the figure. In this embodiment, the traveling roller chain 30 uses a roller chain, and is laid over the entire length of the movable range of the portal crane 11. The laying operation of the traveling roller chain 30 is performed, for example, by disposing an H steel 36 in parallel with the base H steel 32 on a steel 34 welded to the base H steel 32 at a predetermined interval, and attaching the H steel 36 to the H steel 36. . Meshes traveling sprocket which will be described later with the traveling roller chain 30, even when a force is applied to the laying direction before and after the running roller chain 30, as the traveling roller chain 30 does not move displaced, on steel H 36 It is firmly fixed.

  The traveling wheel 28 is rotatably attached to the saddle 14 at a lower portion of each leg 12. A load such as a load of the portal crane 11 and a suspended load is applied to each traveling wheel 28. As will be understood from FIG. 6, which will be described later, the traveling wheels 28 have substantially the same thickness as the width of the rail 26, and have flanges 29 formed on both sides so as to sandwich the rail 26.

  A drive section 40 is attached to each of the front and rear ends of the saddle 14. Since the legs 12 are located at the front end and the rear end of the saddle 14, it can be said that the driving units 40 are attached near the bases of the legs 12, respectively. FIG. 5 is a schematic side view of the driving unit 40. FIG. 6 is a schematic front view of the driving unit 40, and FIG. 7 is a schematic top view of the driving unit 40.

The drive section 40 is a mechanism for applying a rotational force to the traveling sprocket 48, and includes a base 15 extending and attached to the saddle 14, a traveling motor 42, a transmission chain 44, a transmission shaft 46, and the like. A traveling motor 42 is mounted on the base 15, and a transmission shaft 46 is mounted on a lower portion. The transmission shaft portion 46 is rotatably held through a lower portion of the base 15 in a direction (width direction) orthogonal to the traveling rail 26, and a sprocket 47 to which one end receives a rotational force from the traveling motor 42. A traveling sprocket 48 meshing with the traveling roller chain 30 is attached to the other end.

  A sprocket 47 is also attached to the rotating shaft of the traveling motor 42. The sprocket 47 and the sprocket 47 attached to the transmission shaft 46 are connected by a transmission chain 44, and the rotational force of the traveling motor 42 is applied to the traveling sprocket. 48 to be driven. By adopting the configuration of transmitting the moving force by the roller chain and the sprocket as described above, the stable and stable movement of the portal crane without slip is achieved.

Therefore, the driving sprocket 48 rotates while meshing with the traveling roller chain 30 by the driving force of the traveling motor 42, and pushes the portal crane 11 in the traveling direction. The four driving motors 42 are driven synchronously by electric power, and appropriate torque is generated.

  Looseness of the transmission chain 44 for transmitting the power of the traveling motor 42 can be adjusted by shifting the traveling motor 42 to the rear of the base 15 (to the left in FIG. 5).

  As described above, the traveling wheel 28 has substantially the same thickness as the lateral width of the rail 26, the flanges 29 are formed on both sides so as to sandwich the rail 26, and the vicinity of the saddle 14 to which the traveling wheel 28 is attached. , A pair of side rollers 49 is attached to the saddle 14 so as to sandwich the traveling rail 26 from both sides. Thereby, rattling to the left and right (in a direction orthogonal to the moving direction) during the movement of the portal crane 11 is suppressed, which contributes to the stable movement of the portal crane 11.

  When the hoist 24 that moves along the girder 22 lifts a heavy object such as equipment and moves out of the portal crane 11 to the extent that the hoist 24 moves laterally, the saddle 14 on the opposite side that is far away from the hoist 24 ( Usually, it is on the wall side of the tunnel 31). In order to prevent this, a lifting prevention roller 50 is attached to the saddle 14.

When an abnormality occurs while the portal crane 11 is traveling, an emergency brake is applied by the brake device 52. The abnormality during traveling corresponds to, for example, a drop of a suspended load, an abnormal meshing between the traveling sprocket 48 and the traveling roller chain 30, a failure of the traveling motor 42, and the like. When such an abnormality occurs, the brake device 52 is actuated immediately to apply a brake to the portal crane 11, and the portal crane 11 stops.

  FIG. 7 is a schematic side view of the brake device 52, and FIG. 9 is a schematic front view of the brake device 52. The brake devices 52 are provided on the two rear traveling wheels 28, respectively. The brake device 52 includes a brake drum 54, a brake shoe 62, a sprocket 56, and a transmission chain 60. A sprocket 56 smaller than the diameter of the traveling wheel 28 is attached to the traveling wheel 28. A brake drum 54 is arranged near an upper portion of the saddle 14 to which the rear traveling wheel 28 is attached. A sprocket 56 is attached to a rotation shaft 58 of the brake drum 54, and the sprocket 56 and the sprocket 56 attached to the traveling wheels 28 are connected by a transmission chain 60.

  The traveling wheel 28 and the brake drum 54 are each provided with a sprocket 56, and the respective sprockets 56 are connected by a transmission chain 60. Therefore, during the movement of the portal crane 11, the traveling wheel 28 is rotated. The brake drum 54 also rotates. If an abnormality occurs during the movement of the portal crane 11, the brake device 52 is configured to apply the brake shoe 62 to the brake drum 54 and stop the rotation of the traveling wheel 28.

  The slack of the transmission chain 60 of the brake device 52 can be adjusted by moving the brake device 52 on the saddle 14 in the traveling direction, and in FIG.

According to the movable portal crane system 10 for an inclined surface of the present embodiment, the portal crane 11 is moved by the traveling sprocket 48 and the traveling roller chain 30 of the driving unit 40 provided on the four legs 12. The slipping on the traveling route of the traveling wheels can be accurately suppressed, so that it is possible to use the vehicle safely even on a sloped surface. That is, since the drive units 40 are provided independently at the four corners of the portal crane 11, the movement is like a so-called four-wheel drive of a car, so that stable and reliable movement is possible. Further, when a trouble occurs during the movement of the portal crane 11, for example, a problem occurs in the engagement between the traveling sprocket 48 and the traveling roller chain 30, two brake devices provided on the rear wheels of the portal crane 11. With 52, the portal crane 11 is stopped urgently. Therefore, it has become possible to safely use the portal crane 11 in a tunnel with a slope.

Note that the present invention is not limited to the configuration described in the above embodiment, and various changes can be made within the scope of the present invention. For example, in the present embodiment, an example in which the roller chain is used as a traveling chain has been described, but any other configuration is possible as long as the configuration can mesh with the sprocket and continuously receive the force from the sprocket in a fixed state. Can be used.
Furthermore, four legs on the two travel rails (on the one hand side and the other side two by two) it is configured to run by, not limited thereto, the configuration of their respective three legs But it is applicable. Also, an example is shown in which one traveling wheel on the rail is provided for each leg, but a plurality of wheels may be provided for each. Further, the brake devices are provided at two places on the rear wheel, but may be provided at four places.

  Further, the saddle 14 is formed in a substantially rectangular shape by using a channel steel, but may have the same function by using other steel materials.

10 Mobile portal crane system for inclined surfaces 11 Portal crane 12 Legs 14 Saddle 16 Slope adjustment stand 18 Upper member 20 Leg joint 22 Garter material 24 Hoist 26 Travel rail 28 Travel wheel 30 Travel roller chain 32 Foundation H steel 36 H steel 40 Drive unit 42 Running motor 44 Transmission chain 46 Rotating shaft 47 Sprocket 48 Running sprocket 49 Side roller 50 Float prevention roller 52 Brake device 54 Brake drum 56 Sprocket 58 Rotating shaft 60 Transmission chain 62 Brake shoe

In order to achieve the above object, a movable portal crane system for inclined surfaces according to claim 1,
A leg having traveling wheels traveling on two parallel traveling rails on one side and the other side, a leg traveling on the one side rail, and a leg traveling on the other side rail, respectively. A movable portal crane system comprising: a movable portal crane having an upper member connecting the upper and lower parts with each other at an upper part thereof, wherein a gradient having a gradient of 1/100 to 5/100 in the extension direction of the rail is provided. In a movable portal crane system for a slope installed on a slope having,
The two leg portions are arranged on the one side rail and the other side rail, respectively, and are fixed to the respective traveling rails so as to extend in parallel with the respective traveling rails and to be open at the top. is installed, two and traveling roller chain extending along the entire length of the movement range of the gantry crane, by at least one said leg portions of each running the two traveling rails, the running state wherein the traction sprocket which rotates is fixed so as to mesh from above to each of the traction roller chain, the portal crane by supplying a rotational force to the driving sprocket provided to each of the leg portions in A motor for traveling on a rail, and height adjusting means provided on each of the legs for leveling the upper member are provided.

Further , since the traveling motor and the traveling sprocket are respectively attached to the four corners of the portal crane, the movement of the portal crane is performed independently at the four corners as in a so-called four-wheel drive of an automobile. That is, even when a load is not evenly applied to the four legs of the portal crane, the traveling sprocket and the traveling chain are engaged with each leg independently of the other legs. Therefore, the safe movement of the portal crane without slipping is ensured.

The movable portal crane system for inclined surfaces according to claim 2 is the movable portal crane system for inclined surfaces according to claim 1 ,
The traveling wheel is provided with a brake device.

Claims (3)

Mobile portal crane having at least two legs each having a traveling wheel and having a movable portal crane moving on two extended parallel running rails on one side and the other side. In the system,
Two traveling chains laid in parallel with each of the rails in the vicinity of the traveling rails and over the entire moving range of the portal crane;
A traveling sprocket that is fixedly installed at least one each on one side and the other side of the leg portion that travels on the two traveling rails, and meshes with and rotates with the traveling chain;
A traveling motor for supplying a rotational force to the traveling sprocket,
A mobile portal crane system comprising:   2. The mobile portal crane system according to claim 1, wherein at least four legs are provided, and the traveling sprocket and the traveling motor are provided on each of the legs. 3.   3. The mobile portal crane system according to claim 1, wherein a brake device is provided on the traveling wheel.

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