Relocation method and connection structure

Abstract

To provide an existing rail relocation method capable of ensuring, when the existing rail is relocated to a new place, strength with a simple configuration at a relocation destination.SOLUTION: A relocation method of an existing rail 21 for relocating, to a relocation destination, a plurality of existing rails 21 supported by a plurality of support columns 10 arranged by being separated from each other and on which a crane is running, comprises: an attachment step for attaching, to the plurality of support columns 10, an extension rail 22 connected to the existing rail 21; an arrangement step for arranging the existing rail 21 between the extension rails 22 attached in the attachment step; a bonding step for bonding the extension rail 22 and the existing rail 21 arranged in the arrangement step using pin junction; and a fixing step for fixing, to the support column 10 attached by the attachment step, the extension rail 22 bonded by the bonding step using a horizontal brace.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a method for relocating an existing rail on which a crane travels and a connection structure, and particularly to a relocation method and a connection structure when an extension rail is fixed to a support column by welding.

Background Art

[0002] Conventionally, cranes have been used to efficiently transport heavy loads in warehouses. The crane travels on a crane girder (rail) supported by support columns arranged at intervals along the longitudinal direction. When the interval between the support columns is long and the weight of the load carried by the crane is large, the strength of the crane girder is insufficient and it becomes deflected, so various countermeasures have been taken.

[0003] For example, Patent Document 1 discloses a reinforcement structure for a crane girder (rail). The reinforcement structure newly provides a new crane support column (support column) in the nearest space of an existing crane girder (existing rail), places and fixes a reinforcement girder on the top of this newly provided crane support column, and connects and fixes the existing girder support column and the newly provided crane support column with a connecting member to reinforce them as an integral structure. By adopting such a configuration, regarding the vertical load of the crane, since the newly provided girder and the existing main girder are connected by the upper surface structure and the lower surface structure, it can be borne by the cross-section integrating these two girders.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Incidentally, in the reinforcement structure described in Patent Document 1 above, it was not assumed that existing rails would be moved to other buildings or the like for use, so the situation of insufficient length due to the arrangement of support columns did not occur. If the length is insufficient due to the arrangement of support columns at the destination where the existing rails are moved, it is necessary to add new rails to the existing rails to extend the entire rail system, but extending it increases the stress, thus creating a need to reinforce the rails. To reinforce the rails, one could consider reinforcement by welding, for example, but there were problems such as deformation of the steel material due to heat welding and increased weight due to the reinforcement work.

[0006] Therefore, the present invention aims to provide a method for relocating existing rails and a connecting structure that can ensure strength at the relocation site with a simple configuration when relocating existing rails to a new location. [Means for solving the problem]

[0007] The present invention relates to a method for relocating multiple existing rails, which are supported by a plurality of spaced-apart support columns and on which a crane travels, to a relocation site, and is characterized by comprising: an attachment step of attaching extension rails connected to the existing rails to the plurality of support columns; an arrangement step of arranging the existing rails between the extension rails attached in the attachment step; a joining step of joining the extension rails and the existing rails arranged in the arrangement step by pin joints; and a fixing step of fixing the extension rails joined in the joining step to the support columns attached in the attachment step by bracing.

[0008] In the method for relocating an existing rail according to the present invention, each of the plurality of support columns may be an H-beam having a truss structure, and the bracing may be provided one on each side of the support column along the longitudinal direction of the extension rail.

[0009] In the method for relocating an existing rail according to the present invention, the bracing member may be a long, plate-shaped member that is positioned at an angle to the extension direction of the existing rail in a plan view, and positioned horizontally to the floor surface in a side view.

[0010] In the method for relocating an existing rail according to the present invention, the existing rail may be a running rail arranged vertically and parallel to the wall of an indoor building, and the crane may be a wall crane that runs along the running rail.

[0011] Furthermore, the present invention relates to a connecting structure for a plurality of existing rails supported by a plurality of spaced-apart support columns and on which a crane travels, and is characterized by comprising: extension rails attached to the plurality of support columns and connected to the existing rails; connecting members arranged between the extension rails and joining the existing rails and the extension rails by pin joints; and bracing for fixing the extension rails, which are joined to the existing rails by the connecting members, to the support columns to which the extension rails are attached. [Effects of the Invention]

[0012] As described above, according to the present invention, when relocating existing rails to a new location, strength can be ensured at the new location with a simple configuration. [Brief explanation of the drawing]

[0013] [Figure 1] This is a schematic perspective view showing the crane and existing rails installed on the building. [Figure 2] This is a schematic diagram of a crane traveling along rails. [Figure 3] This diagram shows the procedure for relocating existing rails according to an embodiment of the present invention. [Figure 4] This is a schematic enlarged view of the main part showing an existing rail connected to an extension rail according to an embodiment of the present invention. [Figure 5] This is a schematic side view showing the support column with extension rails attached to the top and bottom. [Figure 6] This is a view from the direction of arrow AA in Figure 5. [Figure 7] This is a view from the arrow BB in Figure 5. [Modes for carrying out the invention]

[0014] Preferred embodiments of the present invention will be described in detail below with reference to the drawings. It should be noted that the embodiments described below are not intended to unduly limit the scope of the present invention as described in the claims, and not all of the configurations described in these embodiments are necessarily essential as solutions to the present invention.

[0015] Figure 1 shows a connecting structure 100 installed in a building. The connecting structure 100 is constructed within a building 200 such as a warehouse and consists of a plurality of support columns 10, a running rail 20 supported by the support columns 10, and a crane 30 that runs on the running rail 20. In the following description, the direction in which the running rail 20 extends is referred to as the X direction, the direction in which the crane 30 moves is referred to as the Y direction, and the direction in which the support columns 10 extend (up and down) is referred to as the Z direction.

[0016] The support columns 10 are metal columns that extend vertically (in the Z direction) within the building 200. The support columns 10 are arranged in a single row on the left and right sides of the building 200 at predetermined intervals (several meters to more than ten meters). The support columns 10 are metal members such as H-beams, but may be made of any material that has sufficient strength. The number and spacing of the support columns 10 within the building 200 are not particularly limited.

[0017] The traveling rail 20 is a metal member composed of a plurality of rails (existing rails) that extend linearly in the horizontal direction (X direction) while being supported by the support columns 10. The traveling rail 20 extends continuously in a pair on the left and right from one side (the front side of the drawing) to the other side (the depth side of the drawing) within the building 200. The existing rails that constitute the traveling rail 20 are, for example, metal members, but may be composed of any material as long as they have strength. Two or more pairs of traveling rails 20 may be provided on the left and right.

[0018] The crane 30 is arranged to extend horizontally to the left and right straddling the pair of traveling rails 20. The crane 30 transports goods, materials, etc. within the building 200 by traveling along the traveling rail 20 in the horizontal direction (X direction). Only one crane 30 may be provided within the building 200, or two or more may be provided. FIG. 1 shows an example where the crane 30 is a ceiling crane, but it is not limited to this, and any type of crane may be used as long as it can travel on the rails, including wall cranes.

[0019] FIG. 2 is a schematic enlarged view showing the relationship between the traveling rail 20 and the crane 30. As shown in the figure, the crane 30 is composed of a girder 31, wheels 32, a trolley 33, a wire 34, and a hook 35.

[0020] The girder 31 is a rod-shaped member provided at the central part of the crane 30 and is arranged between the traveling rails 20 so as to extend in the left-right direction (Y direction). The wheels 32 are provided on both sides of the girder 31 (only shown on one side), and are arranged to contact the upper part or side surface of the traveling rail 20. The trolley 33 is provided on the girder 31 so as to be movable in the left-right direction. A wire 34 is attached to the trolley 33, and a hook 35 is provided at the tip of the wire 34.

[0021] As the wheels 32 move along the rails 20, the crane 30 can move in the forward / backward direction (X direction). The trolley 33 can move in the left / right direction (Y direction) along the girder 31. As a result, the crane 30 can freely move the loads and materials attached to the hook 35 in both the forward / backward and left / right directions.

[0022] Incidentally, there are cases where it is necessary to relocate the connecting unit 100 shown in Figure 1 within the same building 200 or to another building 200. When relocating the connecting unit 100, the multiple support columns 10, the running rails 20, and the crane 30 are relocated as a whole, but depending on the conditions at the relocation site, the spacing between the support columns 10 may differ. The length of the running rails 20 is predetermined and fixed, but if the spacing between the support columns 10 becomes longer, the running rails 20 may become too short. In such a situation, it becomes necessary to extend the length of the running rails 20 themselves. In the following explanation, we will assume that the spacing between the support columns 10 has become longer than before. Furthermore, the running rails 20 will be composed of multiple existing rails 21 whose lengths have been predetermined and extension rails 22 placed between the existing rails 21.

[0023] Figure 3 illustrates the method for relocating the existing rails 21. First, as shown in Figure 3(a), extension rails 22 are attached to each support column 10 (attachment process). Here, the existing rails 21 are existing rails that were already present within the building 200, and their length is predetermined. On the other hand, the extension rails 22 are placed to fill the gaps that occur between the existing rails 21 at the relocation site. Therefore, the length of the extension rails 22 is determined considering the spacing between the support columns 10 and the length of the existing rails 21, and these extension rails 22 are attached to the support columns 10. Note that the extension rails 22 may be composed of a single component or of multiple components.

[0024] Next, as shown in Figure 3(b), the existing rails 21 are positioned between the extension rails 22 (positioning step). Specifically, as shown in the figure, the existing rails 21 are connected to the extension rails 22 so that they are in continuous contact without any gaps. The existing rails 21 and extension rails 22 can be joined by, for example, a pin joint. However, the method of joining is not limited to this, and any method of joining is acceptable as long as the existing rails 21 and extension rails 22 are firmly fixed together.

[0025] Furthermore, as shown in Figure 3(c), the extension rail 22, which is joined to the existing rail 21, is fixed to the support column 10 to which the extension rail 22 is attached using a brace 40 (fixing process). Specifically, as shown in the figure, the brace 40 is positioned to fix the extension rail 22 to the support column 10 to which the extension rail 22 itself is attached. Figure 3(c) shows the brace 40 as viewed from the support column 10 side. In a side view, the brace 40 is positioned horizontally to the floor surface. Details of the brace 40 will be described later.

[0026] Figure 4 is a schematic enlarged view of the main part showing the state in which the existing rail 21 is connected to the extension rail 22. As shown in the figure, the extension rail 22 is supported by the support column 10, and the existing rail 21 is arranged on both sides of the extension rail 22, and together they constitute the running rail 20. The support column 10 is an H-beam with a truss structure having a pair of column members 10a and 10b extending in the vertical direction and a plurality of reinforcing parts 11 between them. Specifically, as shown in Figure 5, a plurality of reinforcing parts 11 are arranged vertically between the pair of column members 10a and 10b, and the support column 10 has a truss structure which is a framework structure of a plurality of triangles formed by the reinforcing parts 11. Having such a structure makes it possible to improve the strength of the support column 10.

[0027] As shown in Figure 4, column member 10a is positioned on the side closer to the extension rail 22, and column member 10b is positioned on the side further away from the extension rail 22. The extension rail 22 is fixed to column member 10a by mounting member 51 and to column member 10b by brace 40.

[0028] The existing rail 21 and the extension rail 22 are joined by a joining member 50 for pin jointing. While splice plates and bolts are possible methods for joining them, they are not limited to these. By joining the existing rail 21 and the extension rail 22 with pin joints, the increase in stress can be suppressed.

[0029] Figure 5 is a schematic side view showing the state in which extension rails are attached to the top and bottom of the support column 10 when the crane 30 is a wall crane. When the crane 30 is a wall crane, as shown in the figure, a running rail 20a is arranged on the upper side and a running rail 20b is arranged on the lower side, and the crane 30 travels on these. The running rails 20a and 20b are arranged parallel to each other vertically, for example, along an indoor wall.

[0030] Each of the running rails 20a and 20b has a brace 40 positioned horizontally to the floor surface in a side view, along the extension direction of the extension rail 22. The running rails 20a and 20b are fixed to the column member 10a by mounting members 51.

[0031] Figure 6 is a view taken along arrow AA in Figure 5. The running rail 20a is composed of an existing rail 21a and an extension rail 22a. The extension rail 22a is attached to the support column 10, and the extension rail 22a is fixed to the support column 10 by a brace 40. The brace 40 is positioned at an angle to the extension direction of the extension rail 22a when viewed from above (plan view). The brace 40 is positioned at an angle so that it moves away from the extension rail 22a as the extension rail 22a approaches the support column 10.

[0032] The brace 40 is positioned so as to be oblique to the extension direction of the running rail 20a in a plan view, and horizontal to the floor surface in a side view. Specifically, one end of the brace 40 is pin-connected to the extension rail 22a by a connecting plate and bolt, and the other end of the brace 40 is pin-connected to the support column 10 by a connecting plate and bolt.

[0033] The fire striker 40 is, for example, a long, plate-like member, having a length of several tens of centimeters to several meters. The fire striker 40 is made of a metal such as iron, but it may be made of any material as long as sufficient strength is ensured.

[0034] Because the bracing 40 is positioned diagonally in a plan view (top view) with respect to the extension direction of the existing rail 21, a horizontal force is generated on the extension rail 22. As a result, even if stress is generated on the running rail 20 in the left-right direction, deflection in the horizontal direction can be suppressed. One or more bracing 40 may be provided on each side of the support column 10 along the longitudinal direction of the extension rail 22a.

[0035] Figure 7 is a view from arrow BB in Figure 5. The running rail 20b is composed of an existing rail 21b and an extension rail 22b. The extension rail 22b is attached to the support column 10, and the extension rail 22b is fixed to the support column 10 by a brace 40. The brace 40 is positioned at an angle to the extension direction of the extension rail 22b in a top view (plan view). The brace 40 is positioned at an angle so that it moves away from the extension rail 22b as the extension rail 22b approaches the support column 10.

[0036] With the above-described connection structure, it is possible to reinforce the connection structure itself by using the bracing 40 without using heavy reinforcing materials. For example, if the entire running rail 20 is constructed from a certain steel material using conventional methods, it weighs approximately 56 tons, and if a reinforcing structure is adopted using conventional methods, it weighs approximately 60 tons. On the other hand, if a connecting body 100 having the connection structure according to the embodiment of the present invention is applied to the same length, it weighs approximately 50 tons. In other words, compared to the case where the length deficiency due to the existing rail 21 is compensated for with the same steel material using conventional methods, a weight reduction of 10% to 20% can be achieved.

[0037] As explained above, in the method for relocating the existing rail 21, extension rails 22 connected to the existing rail 21 are attached to multiple support columns 10, the existing rail 21 is positioned between the attached extension rails 22, the extension rails 22 and the positioned existing rail 21 are joined by pin joints, and the joined extension rails 22 are fixed to the attached support columns 10 with bracing 40. As a result, even if the length of the existing rail 21 is insufficient at the relocation site, the existing rail 21 and the extension rails 22 are joined and the extension rails 22 are fixed to the support columns 10 with bracing 40, so there is no need to reinforce by welding to extend it. Therefore, when relocating the existing rail 20 to a new location, the use of heavy and expensive components can be avoided, and strength can be ensured at the relocation site with a simple (lightweight) configuration.

[0038] Although one embodiment of the present invention and its examples have been described in detail above, it will be readily apparent to those skilled in the art that many modifications are possible without substantially departing from the novel aspects and effects of the present invention. Therefore, all such modifications are included within the scope of the present invention.

[0039] For example, any term that appears at least once in the specification or drawings alongside a broader or synonymous term may be replaced with that different term anywhere in the specification or drawings. Furthermore, the method for relocating existing rails and the configuration of the connecting structure are not limited to those described in the embodiment and examples, and various modifications are possible. [Explanation of symbols]

[0040] 10 Support column, 11 Reinforcement section, 20, 20a, 20b Running rail, 21, 21a, 21b Existing rail, 22, 22a, 22b Extension rail, 30 Crane, 31 Girder, 32 Wheel, 33 Trolley, 34 Wire, 35 Hook, 40 Bracing, 50 Joining member, 100 Connecting body, 200 Building

Claims

1. A method for relocating existing rails, which are supported by multiple spaced-apart support columns and on which a crane travels, to a new location, Installation steps include attaching extension rails, which are connected to the existing rails, to the plurality of support columns, The arrangement step involves arranging the existing rails between the extension rails that were installed in the installation step, A joining step in which the extension rail and the existing rail positioned in the positioning step are joined by pin joint, A fixing step in which the extension rail, which has been joined in the joining step, is fixed to the support column, which has been attached in the mounting step, by using a fire strike, A method for relocating existing rails, characterized by having the following features.

2. Each of the aforementioned plurality of support columns is an H-beam having a truss structure. The aforementioned bracing elements are provided one on each side of the support column along the longitudinal direction of the extension rail. A method for relocating an existing rail according to claim 1, characterized by the above.

3. The aforementioned bracing is a long, plate-shaped member, positioned diagonally to the extension direction of the existing rail in a plan view, and horizontal to the floor surface in a side view. A method for relocating an existing rail according to claim 1 or claim 2, characterized by the above.

4. The aforementioned existing rails are running rails arranged vertically and parallel to each other along the indoor wall. The crane is a wall crane that travels along the aforementioned rails. A method for relocating an existing rail according to claim 1 or claim 2, characterized by the above.

5. A connecting structure for multiple existing rails on which a crane runs, supported by multiple spaced-apart support columns, An extension rail that is attached to the aforementioned plurality of support columns and connected to the existing rail, A joining member that connects the existing rail and the extension rail, which are positioned between the extension rails, by pin joint, A brace is used to fix the extension rail, which is joined to the existing rail by the joining member, to the support column to which the extension rail is attached, A connecting structure for existing rails, characterized by comprising the following:

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