Heavy-duty transport stand

Abstract

To provide a heavy load transport stand capable of smoothly moving a heavy load on an arc-curved rail while being loaded with the heavy load and preventing the load from coming off the rail. [Solution] The heavy load transport platform 1 of the present invention comprises a platform unit 10 on which a heavy load A is mounted, and a wheel unit 20 which supports the platform unit 10 on two rails B, the wheel unit 20 consisting of two rows of wheel arrays 20a arranged in parallel in the width direction, and of the multiple wheels 21 constituting each wheel array 20a, the front wheel 21 and the last wheel 21 are fixed wheels 21a, and one or more wheels 21 sandwiched between the fixed wheels 21 are sliding wheels 21b, and the sliding wheels 21b are configured to be freely slidable in the width direction of the wheel array 20a relative to the platform unit 10 via sliding means 22.

Description

[Technical field]

[0001] The present invention relates to a heavy-duty transport platform, and more particularly to a heavy-duty transport platform capable of smoothly moving a loaded heavy load on an arc-curved rail and preventing the load from coming off the rails. [Background technology]

[0002] When excavating a tunnel using the shield method, if there is an existing underground structure in the middle of the section being excavated by the shield machine, it becomes necessary to move the shield machine in the underground structure section without using jacks to propel it forward. Patent Document 1 discloses a technology in which a shield machine is mounted on a transport platform, which is then placed on two rails installed on the ground, and moved from an adit to the main tunnel along the rails. When transporting a heavy load of several hundred tons such as a shield machine, in order to avoid concentrating the load on a specific wheel, multiple wheels are arranged in a straight line to form a wheel train, and the load of the heavy load is distributed to multiple wheels of the wheel train and supported on the rails. In addition, there is a demand for transporting large, heavy objects on a transport platform in narrow spaces, such as underground or in tunnels, in addition to shield machines. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2000-199531 A Summary of the Invention [Problem to be solved by the invention]

[0004] When the route for transporting heavy objects includes curves, rails that have been curved into an arc with a specified radius are installed and used in the curved sections. When a transport platform equipped with multiple wheels is moved on a curved rail, the wheels, which are arranged in a straight line, cannot follow the curve of the rail, which may cause the wheels to become unable to rotate or damage the wheels due to uneven pressure on the axles. In addition, the wheels may not be able to maintain proper contact with the rail at the curved section, which may cause the wheels to derail from the rail.

[0005] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a heavy load transport platform capable of solving the above problems. [Means for solving the problem]

[0006] The heavy load transport platform of the present invention comprises a platform unit for mounting a heavy load, and a wheel unit for supporting the platform unit on two rails, the wheel unit consisting of two rows of wheel arrays arranged in parallel in the width direction, and of the multiple wheels constituting each wheel array, the front and last wheels are fixed wheels, and one or more wheels sandwiched between the fixed wheels are sliding wheels, and the sliding wheels are configured to be freely slidable in the width direction of the wheel array relative to the platform unit via a sliding means.

[0007] The heavy load transport platform of the present invention has a sliding means comprising a first sliding means provided on the upper part of the sliding wheel and a second sliding means provided on the lower part of the platform unit and in contact with the first sliding means, and one of the first sliding means and the second sliding means may be a self-lubricating sliding block, and the other may be a smooth sliding surface.

[0008] In the heavy load transport platform of the present invention, the platform unit may be provided with a regulating member protruding downward from the platform unit outside the second sliding means, and the regulating member may regulate the maximum sliding width of the sliding wheel in the width direction of the wheel array and the sliding in the longitudinal direction of the wheel array.

[0009] In the heavy load transport platform of the present invention, the sliding blocks may be made of MC Nylon (registered trademark).

[0010] In the heavy load transport platform of the present invention, at least one of the fixed wheels and the sliding wheels may be configured to be rotatable in the horizontal direction relative to the platform unit via a rotating means.

[0011] The heavy load transport platform of the present invention has a rotation means comprising a first rotation means provided on the upper part of the fixed wheel and / or the sliding wheel, and a second rotation means provided on the lower part of the platform unit and in contact with the first rotation means, and at least one of the first rotation means and the second rotation means may be a self-lubricating rotation block.

[0012] The heavy object transport platform of the present invention may be configured so that one of the first and second rotating means has a cylindrical rotating convex portion extending in the height direction, and the other has a cylindrical rotating concave portion extending in the height direction, and the fixed wheel and / or the sliding wheel rotate horizontally around the axis of the rotating convex portion fitted into the rotating concave portion.

[0013] In the heavy load transport platform of the present invention, the rotating block may be a block made of MC nylon.

[0014] In the heavy load transport platform of the present invention, the fixed wheels and / or the sliding wheels may be provided with flanges that guide the sides of the rails. Effect of the Invention

[0015] The heavy load transport platform of the present invention has a structure in which the sliding wheels are connected so that they can slide freely in the width direction of the wheel array. Therefore, when the rail is curved, the sliding wheels slide to the outside of the curve, and the linear shape of the wheel array automatically follows the curve of the rail. This ensures proper contact between the multiple wheels and the rails, allowing smooth movement along the rails while effectively preventing the wheels from coming off the rails. [Brief description of the drawings]

[0016] [Figure 1] Illustration of heavy load transport platform [Diagram 2] Illustration of the stand unit and wheel unit [Diagram 3] Sliding wheel diagram [Figure 4] Illustration of curved movement of heavy load transport platform [Diagram 5] FIG. 2 is an explanatory diagram of the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] The heavy load transport platform of the present invention will be described in detail below with reference to the drawings. In the present invention, the terms "length", "length direction", "width", "width direction", "height" and other directional terms refer to the respective directions when the heavy load transport platform is placed on two rails, with the parallel direction of the two rails being the width direction and the extension direction of the rails being the length direction. EXAMPLES

[0018] <1> Heavy-duty transport platform (Fig. 1) The heavy load transport platform 1 of the present invention is a platform that moves on two rails B with a heavy load A mounted thereon. The heavy load transporting platform 1 includes at least a platform unit 10 on which a heavy load A is mounted, and a wheel unit 20 that supports the platform unit 10. The heavy load transport platform 1 moves on the rails B by being towed by towing means such as a horizontal jack (not shown). However, the towing means is not limited to a horizontal jack, and may be a wire winch, a chain hoist, etc. Also, it may have a self-propelled structure that can move by rotation of the wheels 21 without being towed. In this example, a case will be described in which a shield machine, which is a heavy load A, is transported by the heavy load transporting platform 1 in an underground structure such as a tunnel. However, the method of using the heavy load transporting platform 1 is not limited to this, and the heavy load transporting platform 1 may be used on the ground, and the heavy load A may be a tunnel boring machine, a large transformer, or the like.

[0019] <1.1> Rail The rail B is a track along which the heavy load transport platform 1 moves. In this example, rail B is composed of a long base made of shaped steel and a steel rail with a roughly I-shaped cross section welded to the upper surface of the base. The heavy load transport platform 1 of the present invention is particularly effective when moving on an arc-shaped rail B, but can also be used for moving on a straight rail B that does not have a radius.

[0020] <2> Mounting unit (Fig. 2) The stand unit 10 is a unit on which a heavy load A is mounted. In this example, the mounting unit 10 is composed of a combination of a plurality of beams 11 extending in the width direction of the mounting unit 10 and arranged in parallel in the length direction, a plurality of girder members 12 extending in the length direction of the mounting unit 10 and connecting the plurality of beams 11, a base 13 installed on the plurality of beams 11, a plurality of support arms 14 installed on the plurality of beams 11, and a plurality of regulating members 15 provided on the undersides of the plurality of beams 11. The beams 11, girders 12, and support arms 14 may be made of structural steel. The pedestal 13 has an upper surface on which a heavy load A can be mounted. In this example, the pedestal 13 has a concave surface corresponding to the bottom surface of the shield machine. The structure of the mounting unit 10 is not limited to the above, and for example, the girder 12 may be attached below the beam 11, and the wheel unit 20 may be attached to the beam 12. Alternatively, instead of the combination of the beam 11 and the beam 12, a plate-like structure may be used.

[0021] <2.1> Restricted materials (Fig. 3) The restricting member 15 is a member that restricts the sliding of the sliding wheel 21b. The regulating member 15 protrudes downward from the lower surface of the beam member 11 so as to surround the upper portion of the sliding wheel 21b. In this example, a steel plate welded to the underside of the beam 11 is used as the restricting member 15 . The restricting member 15 restricts the left and right of the sliding wheel 21b, restricting the maximum sliding width of the sliding wheel 21b in the width direction of the wheel array 20a. The maximum sliding width can be set arbitrarily according to the curvature radius of the rail B. In addition, the restricting member 15 restricts the front and rear of the sliding wheel 21b, restricting the sliding wheel 21b from sliding in the longitudinal direction of the wheel array 20a.

[0022] <3> Wheel unit (Fig. 2) The wheel unit 20 is a unit of wheels 21 that move on the rail B. The wheel unit 20 is made up of two rows of wheel arrays 20a arranged in parallel in the width direction. The interval between the two rows of wheel arrays 20a corresponds to the gauge of the two rails B.

[0023] <3.1> Wheel array (Fig. 2) The wheel array 20 a is a row of multiple wheels 21 . The wheel array 20a consists of a combination of a front fixed wheel 21a, a last fixed wheel 21a, and one or more sliding wheels 21b sandwiched between the two fixed wheels 21a, and extends along the extension direction of the rail B, i.e., the longitudinal direction of the mounting unit 10. The fixed wheel 21a is fixed to the lower surface of the beam 11. The term "fixed" for the fixed wheel 21a means that it does not slide in the horizontal direction in comparison with the sliding wheel 21b. The sliding wheel 21b is slidably connected to the lower surface of the beam 11. In this example, the wheel array 20a is a combination of two fixed wheels 21a and four sliding wheels 21b. The fixed wheel 21a and / or the sliding wheel 21b may be provided with a flange (not shown) for guiding the side surface of the rail B on the inner side and / or the outer side in the width direction of the wheel array 20a.

[0024] <3.2> Sliding wheel (Fig. 3) The sliding wheel 21b is a wheel that is capable of sliding in the width direction of the wheel array 20a. The sliding wheel 21b includes a wheel body 21c and a support base 21d provided on the upper part of the wheel body 21c, and supports the beam 11 on the upper surface of the support base 21d. In this example, a sliding means 22 described later is interposed between the upper surface of the support base 21d and the lower surface of the beam material 11, and the outer periphery of the support base 21d is surrounded by a regulating material 15 provided on the lower surface of the beam material 11, thereby connecting the sliding wheel 21b so that it can slide in the width direction of the wheel array 20a. However, the sliding direction of the sliding wheel 21b is not limited to the width direction of the wheel array 20a, and the sliding wheel 21b may also be configured to be slidable in the longitudinal direction of the wheel array 20a.

[0025] <3.3> Sliding means (Fig. 3) The sliding means 22 is a means for sliding the sliding wheel 21b. In this example, the sliding means 22 is made up of a combination of a sliding block 22a attached to the upper part of a support base 21d of the sliding wheel 21b and a sliding surface 22b formed on the lower part of the beam material 11. The sliding surface 22b is the smooth lower surface of the beam material 11. A lubricant may be applied to the sliding surface 22b to enhance lubricity. However, the sliding means 22 is not limited to the above, and for example, a sliding surface 22b may be formed on the upper part of the support base 21d, and a sliding block 22a may be attached to the lower part of the beam 11. Also, the sliding means 22 may be disposed inside the support base 21d, not between the beam 11 and the support base 21d. Furthermore, the sliding means 22 may be a self-lubricating sliding sheet, a roller mechanism, a rail mechanism, a linear guide mechanism, or the like, instead of the sliding block 22a.

[0026] <3.3.1> Sliding block (Fig. 3) The sliding block 22a is made of a block material having self-lubricating properties. In this embodiment, a block made of MC nylon is used as the sliding block 22a. MC nylon is an engineering plastic with improved functionality, mainly made of polyamide (PA) resin. MC nylon is particularly suitable as a material for the sliding block 22a because it has self-lubricating properties, extremely low frictional resistance, and excellent mechanical properties such as durability, heat resistance, and chemical resistance. However, the material of the sliding block 22a is not limited to MC nylon, and may be other known self-lubricating resins such as polyacetal (POM) and polyether ether ketone (PEEK).

[0027] <4> Curved movement of a heavy-duty transport platform (Fig. 4) When the heavy load transport platform 1 moves along a straight portion of the rail B, the sliding wheels 21b of the wheel array 20a are arranged in a straight line between the front and rear fixed wheels 21a. When the heavy load transport platform 1 approaches a curved section of the rail B from a straight section, the sliding wheels 21b of the wheel array 20a slide in the curved direction of the rail B from the imaginary line connecting the front and rear fixed wheels 21a, and deform into an arc-shaped arrangement connecting the front and rear fixed wheels 21a. The heavy load transport platform 1 of the present invention is capable of smooth movement on the rail B by autonomously following the curve of the rail B in the curved portion of the rail B with the linear shape of the wheel array 20a. In addition, by ensuring appropriate contact between the wheels 21 and the rail B, it is possible to prevent the platform 1 from running off the rail B. EXAMPLES

[0028] [Example with Rotating Means] In this example, at least some of the wheels 21 constituting the wheel array 20a are provided with a rotating means 23 (FIG. 5). The rotating means 23 is a means for horizontally rotating the wheel 21. In this embodiment, an example in which the rotating means 23 is provided on the fixed wheel 21a will be described, but the rotating means 23 may be provided on the sliding wheel 21b, or on both the fixed wheel 21a and the sliding wheel 21b. In this example, the rotation means 23 consists of a combination of a rotation block 23a attached to the upper part of the support base 21d of the fixed wheel 21a and a rotation material 23b attached to the lower part of the beam material 11, and a cylindrical rotation concave portion is provided at the center of the upper surface of the rotation block 23a, and a cylindrical rotation convex portion is provided at the center of the lower surface of the rotation material 23b. The rotating block 23a is a block material having self-lubricating properties. In this embodiment, a block made of MC nylon is used as the rotating block 23a. By fitting the rotation convex portion of the rotation member 23b into the rotation concave portion of the rotation block 23a, the wheel 21 becomes freely rotatable in the horizontal direction relative to the beam member 11 about the rotation convex portion as an axis. As a result, when the heavy object transport platform 1 moves along the curved portion of the rail B, the front and rear fixed wheels 21a rotate along the curve of the rail B, and the front-to-rear direction of the fixed wheels 21a coincides with the extension direction of the rail B, making movement on the rail B even smoother. However, the rotating means 23 is not limited to the above, and for example, a rotating member 23b may be attached to the upper part of the support base 21d and a rotating block 23a may be attached to the lower part of the beam 11, or the rotating convex part and the rotating concave part may be interchanged. Also, the rotating means 23 may be disposed inside the support base 21d, instead of between the beam 11 and the support base 21d. Furthermore, the rotating means 23 may be a bearing mechanism using a bearing, etc. [Explanation of symbols]

[0029] 1 Heavy-duty transport platform 10 Mounting unit 11 Beam material 12 Girder material 13 Pedestal 14 Support Arm 15 Restricted materials 20 Wheel unit 20a Wheel Array 21 wheels 21a Fixed wheel 21b Sliding wheel 21c Wheel body 21d Support stand 22 Sliding means 22a Sliding block 22b Sliding surface 23 Rotation means 23a Rotating block 23b Rotating member A Heavy objects B Rail

Claims

1. A heavy-duty transport platform that can move on two parallel rails with a heavy load loaded on top, A stand unit on which the heavy object is mounted; and a wheel unit that supports the platform unit on the two rails; The wheel unit is composed of two wheel arrays arranged in parallel in the width direction, In each of the wheel arrays, a front wheel and a last wheel are fixed wheels, and one or more wheels sandwiched between the fixed wheels are sliding wheels; The sliding wheel is configured to be slidable in a width direction of the wheel array relative to the base unit via a sliding means; The sliding means comprises a first sliding means provided on an upper portion of the sliding wheel, and a second sliding means provided on a lower portion of the pedestal unit and in contact with the first sliding means; One of the first sliding means and the second sliding means is a self-lubricating sliding block, and the other is a smooth sliding surface; The sliding directions of all the sliding wheels are fixed in the width direction of the wheel array, The load of the heavy object can be substantially evenly distributed and supported by all of the fixed wheels and all of the sliding wheels. Heavy load transport stand.

2. the gantry unit includes a restricting member protruding downward from the gantry unit on the outer side of the second sliding means, The regulating member regulates the maximum sliding width of the sliding wheel in the width direction of the wheel array and the sliding in the longitudinal direction of the wheel array.

2. The heavy load transport platform according to claim 1.

3. The sliding block is made of MC Nylon (registered trademark).

3. A heavy load transport platform according to claim 1 or 2.

4. At least one of the fixed wheel and the sliding wheel is configured to be rotatable in a horizontal direction relative to the pedestal unit via a rotating means.

2. The heavy load transport platform according to claim 1.

5. The rotating means comprises a first rotating means provided on an upper portion of the fixed wheel and / or the sliding wheel, and a second rotating means provided on a lower portion of the pedestal unit and in contact with the first rotating means, At least one of the first pivot means and the second pivot means is a self-lubricating pivot block.

5. The heavy load transport platform according to claim 4.

6. One of the first rotation means and the second rotation means has a cylindrical rotation convex portion extending in a height direction, and the other has a cylindrical rotation concave portion extending in a height direction, The fixed ring and / or the sliding ring rotate horizontally around the rotating convex portion fitted into the rotating concave portion.

6. A heavy load transport platform according to claim 5.

7. The rotating block is made of MC nylon.

7. The heavy load transport platform according to claim 6.

8. The fixed ring and / or the sliding ring are provided with a flange that guides the side surface of the rail.

2. The heavy load transport platform according to claim 1.

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