Mounting device for wire laying rollers and method for mounting wire laying rollers

Abstract

This invention provides a wire-laying roller mounting device and a wire-laying roller mounting method that ensure worker safety and improve work efficiency by attaching wire-laying rollers from the ground. [Solution] The wire laying roller mounting device 1 comprises an operating rod 10 for operating a wire laying roller 30 that can be attached to an object located at a high place to be attached to the object, and a connecting part 20 whose tip is detachably connected to the tip of the operating rod 10 and whose base end is detachably connected to the wire laying roller 30.

Description

Technical Field

[0001] The present disclosure relates to a roller mounting device for an extension cord and a method for mounting a roller for an extension cord.

Background Art

[0002] In an indoor cable extension method, there is a known method in which after attaching a roller for an extension cord to a cable installation location such as a cable rack, a new cable is drawn into the roller for the extension cord.

[0003] Patent Document 1 discloses a cable rack fixing member that can easily fix a cable extension roller device as a roller for an extension cord to a parent beam of a cable rack in an indoor cable extension work.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, since cable installation locations such as cable racks are at high places, attachment of a roller device for an extension cord as in Patent Document 1 requires a lifting operation using a stepladder or the like, which places a burden on the operator from the viewpoints of the operator's safety and work efficiency.

[0006] An object of the present disclosure is to provide a roller mounting device for an extension cord and a method for mounting a roller for an extension cord that ensure the safety of an operator and improve work efficiency by mounting the roller for the extension cord from the ground.

Means for Solving the Problems

[0007] In order to solve the above problems, a roller mounting device for an extension cord according to one aspect of the present disclosure is An operating rod for operating a cable-laying roller, which can be attached to an object located at a high altitude, to be attached to the said object, A connecting part whose tip is detachably connected to the tip of the operating rod and whose base end is detachably connected to the wire-laying roller, It is equipped with. [Effects of the Invention]

[0008] According to this disclosure, it is possible to provide a wire-laying roller mounting device and a wire-laying roller mounting method that ensure the safety of workers and improve work efficiency by attaching wire-laying rollers from the ground. [Brief explanation of the drawing]

[0009] [Figure 1] This is a perspective view showing the configuration of the wire laying roller mounting device 1 of this embodiment. [Figure 2] This is a front view showing the configuration of the wire laying roller mounting device 1 of this embodiment. [Figure 3] This is a side view showing the configuration of the wire laying roller mounting device 1 of this embodiment. [Figure 4] This is an enlarged view showing the operating rod 10 of this embodiment. [Figure 5] This is an enlarged view showing the connection portion 20 of this embodiment. [Figure 6] This diagram shows the connection between the operating rod 10 and the connecting part 20 in this embodiment. [Figure 7] This flowchart shows a method for attaching a wire-laying roller using the wire-laying roller attachment device 1 according to this embodiment. [Figure 8] This figure shows the process of attaching a cable laying roller device 30 to a cable rack using the cable laying roller mounting device 1 according to this embodiment. [Figure 9] This diagram shows a cable laying roller device 30 attached to a cable rack. [Modes for carrying out the invention]

[0010] The embodiments of this disclosure will be described below with reference to the drawings. In all the drawings illustrating the embodiments, common components are denoted by the same reference numerals, and repeated descriptions are omitted. The following embodiments are not intended to unduly limit the content of this disclosure as described in the claims. Not all components shown in the embodiments are necessarily essential components of this disclosure. Also, each drawing is a schematic diagram and is not necessarily a strict illustration.

[0011] Furthermore, in the following explanations, when describing similar elements without distinction, a reference code (or a common code among reference codes) may be used, and when describing similar elements with distinction, the element's identification number (or reference code) may be used.

[0012] <Overall Structure> The cable laying roller mounting device according to this embodiment is a device for attaching a cable laying roller to a cable installation location at a high place during cable laying work for new indoor communication cables. The cable laying roller has a clamping portion that can be attached to the mounting target and is a roller that can pull in new communication cables while attached to the cable installation location.

[0013] In the following explanation, a cable rack, which is a cable installation location, will be used as an example of the mounting target. In this embodiment, "high place" is not limited to places 2 meters or more above the ground, but includes places that are too high for a worker on the ground to reach even if they stretch their arms. Also in this embodiment, "tip" refers to one end in the longitudinal direction, and "base" refers to the other end in the longitudinal direction.

[0014] The configuration of the wire-laying roller mounting device 1 according to this embodiment will now be described. Figure 1 is a perspective view showing the configuration of the wire-laying roller mounting device 1 according to this embodiment. Figure 2 is a front view showing the configuration of the wire-laying roller mounting device 1 according to this embodiment. Figure 3 is a side view showing the configuration of the wire-laying roller mounting device 1 according to this embodiment.

[0015] As shown in FIGS. 1 to 3, the extension cord roller mounting device 1 includes an operating rod 10 and a connecting portion 20. The extension cord roller mounting device 1 is connected to the cable extension cord roller device 30 and mounts the cable extension cord roller device 30 on a high-place cable rack. The tip of the operating rod 10 is detachably connected to the connecting portion 20. The connecting portion 20 is disposed between the operating rod 10 and the cable extension cord roller device 30 and connects them. Specifically, the tip of the connecting portion 20 is detachably connected to the operating rod 10, and the base end is detachably connected to the cable extension cord roller device 30.

[0016] <Configuration of the operating rod 10> The operating rod 10 includes a main body 11, a convex portion 12, and a protruding portion 13. The operating rod 10 is operated to be lifted and hooked toward the cable rack while supporting the cable extension cord roller device 30 by an operator on the ground. Then, the operating rod 10 is rotated in the circumferential direction by the operator to sandwich the main girder of the cable rack with the sandwiching portion 33 of the cable extension cord roller device 30.

[0017] The main body 11 is a rod-shaped member that serves as a handle for an operator on the ground, and its cross-sectional shape is, for example, circular so that the operator can carry it. The main body 11 is formed of a lightweight material, for example, a plastic having electrical insulation.

[0018] FIG. 4 is an enlarged view showing the operating rod 10 of the present embodiment.

[0019] As shown in FIG. 4, the convex portion 12 is provided at the tip of the main body 11. The cross-sectional shape of the convex portion 12 is, for example, circular, and the diameter of the convex portion 12 is smaller than the inner diameter of the concave portion 22 of the connecting portion 20, and the convex portion 12 fits into the concave portion 22. The convex portion 12 is formed of a lightweight material, for example, a plastic having electrical insulation. In FIG. 4, the convex portion 12 is provided integrally with the main body 11 at the tip of the main body 11, but it may be attached as a separate part.

[0020] The projection 13 is provided on the side surface of the convex portion 12. The projection 13 has a rod-shaped base and a spherical tip. The height of the rod-shaped portion of the projection 13 is greater than the height of the groove 23 of the recess 22. Also, the width of the rod-shaped portion of the projection 13 is smaller than the width of the groove 23 of the recess 22, while the width of the spherical portion is greater than the width of the groove 23. Therefore, when fitting the convex portion 12 into the recess 22, the rod-shaped portion of the projection 13 can move along the groove 23, and the spherical portion protrudes outside the groove 23 to act as an external restraint. This increases the tightness between the convex portion 12 and the recess 22, improving the operability with the operating rod 10.

[0021] <Configuration of connection section 20> As shown again in Figures 1 to 3, the connecting part 20 comprises a main body 21, a recess 22, a groove 23, and a male screw 24. The connecting part 20 connects the operating rod 10 and the cable laying roller device 30, and also adjusts and fixes the width of the clamping part 33 of the cable laying roller device 30. The main body 21 is a rod-shaped member, and its cross-sectional shape is, for example, circular, similar to the main body 11 of the operating rod 10.

[0022] The main body 21 is preferably made of metal, for example, to support the weight of the cable laying roller device 30 connected to its upper part, but it is not limited to this and may be made of electrically insulating plastic.

[0023] Figure 5 is an enlarged view showing the connection portion 20 of this embodiment.

[0024] As shown in Figure 5, the recess 22 is provided with an opening at the tip of the main body 21. The cross-sectional shape of the recess 22 is, for example, circular, and the inner diameter of the recess 22 is larger than the diameter of the protrusion 12 of the operating rod 10, so that the protrusion 12 fits into the recess 22.

[0025] The groove 23 is provided on the side surface of the recess 22. The groove 23 is L-shaped and has an opening at the tip of the main body 21. In other words, the groove 23 has a first portion extending longitudinally from the tip of the main body 21 and a second portion extending transversely (circumferentially) from the end of the first portion opposite to the tip of the main body 21. The width of the groove 23 is greater than the width of the rod-shaped portion of the projection 13, and the height of the groove 23 (the difference between the outer diameter and inner diameter of the main body 21) is less than the height of the rod-shaped portion of the projection 13.

[0026] Figure 6 shows the operating rod 10 and the connecting part 20 connected in this embodiment.

[0027] As shown in Figure 6, when connecting the operating rod 10 and the connecting part 20, when the convex portion 12 of the operating rod 10 is fitted into the recess 22 of the connecting part 20, the projection 13 enters from the opening of the groove 23 along the first portion and reaches the end of the first portion. Then, by rotating the operating rod 10 in the circumferential direction, the projection 13 enters along the second portion, and the operating rod 10 and the connecting part 20 are connected.

[0028] As shown again in Figure 5, the male thread 24 is provided at the base end of the main body 21 so as to extend longitudinally. The male thread 24 is preferably made of metal, like the main body 21, in order to support the weight of the cable laying roller device 30 which is connected to its upper part. The male thread 24 is connected to the main body 21 by welding.

[0029] The male screw 24 fits into the female screw 36 of the cable laying roller device 30. When the male screw 24 is tightened against the female screw 36, the connection part 20 and the cable laying roller device 30 are connected. Also, by tightening the male screw 24, the width of the clamping part 33 of the cable laying roller device 30 is adjusted. The male screw 24 is preferably long in the longitudinal direction to ensure the range of motion of the clamping part 33, for example, about 70 mm.

[0030] <Configuration of the cable laying roller device 30> As shown again in Figures 1 to 3, the cable laying roller device 30 comprises a main body 31, a roller section 32, and a clamping section 33. The cable laying roller device 30 is mainly used for laying new communication cables in cable racks. By using the cable laying roller device 30, it is possible to store the lowered cable under the roller section 32 after laying.

[0031] The main body 31 is the main body of the cable laying roller device 30, and is a rod-shaped metal fitting with a C-shaped cross-section. The main body 31 is attached to the main beam of the cable rack by a clamping portion 33 provided at its tip, and supports the roller portion 32 on the base end side of the clamping portion 33.

[0032] The roller section 32 comprises a shaft 32a and a plurality of rollers 32b. The roller section 32 is provided on the base end side of the clamping section 33 of the main body 31.

[0033] The shaft 32a is a J-shaped metal fitting. The shaft 32a has a curved portion (semicircular portion) at its bottom, with a long axis portion at one end of the curved portion and a short axis portion at the other end. The long axis portion of the shaft 32a is supported so as to be movable along the C-shaped opening of the main body 31, and its height is adjusted to match the cable rack and fixed to the main body 31 with mounting bolts. The long axis portion of the shaft 32a is formed by a shaft (bolt) extending in the longitudinal direction and a nut into which the shaft fits, and is fitted inside the socket. This allows the long axis portion to rotate in the circumferential direction at 30-degree intervals within the socket, and the angles of the curved portion and the short axis portion relative to the shaft 32a can be adjusted.

[0034] Multiple rollers 32b are provided on the curved and short-axis portions of the shaft 32a. The shaft 32a is inserted into the rollers 32b, and the rollers 32b are mounted so as to be rotatable in the circumferential direction of the shaft 32a. In cable laying work, by placing the new communication cable on the multiple rollers 32b, the roller portion 32 acts as a guide surface, and the rotation of the rollers 32b pulls in the new communication cable.

[0035] The clamping portion 33 comprises a protective member 34, an upper clamping portion 35a, a lower clamping portion 35b, and an internal thread 36. The clamping portion 33 is provided at the tip of the main body 31. The clamping portion 33, with the protective member 34, the upper clamping portion 35a, and the lower clamping portion 35b, forms a space S on the C-shaped opening side of the main body 31 to clamp the main beam of the cable rack.

[0036] The protective member 34 is attached along the C-shaped opening of the main body 31. The protective member 34 is made of resin or the like, and when the main beam of the cable rack is clamped between the upper clamping portion 35a and the lower clamping portion 35b, it is positioned between the main body 31 and the main beam of the cable rack, thereby preventing damage to the cable rack.

[0037] The upper clamping portion 35a is provided above the clamping portion 33. The upper clamping portion 35a has an L-shaped cross-section so as to clamp the main beam of the cable rack from above on the C-shaped opening side of the main body 31. In addition, the upper clamping portion 35a can be hooked from the top side before clamping the main beam of the cable rack. The upper clamping portion 35a has a tall nut (not shown) welded to its upper surface, and a bolt that passes through the main body 31 and the protective member 34 is fitted into the tall nut and fixed. The fixing position of the upper clamping portion 35a can be adjusted according to the insertion position of the bolt.

[0038] The lower clamping portion 35b is provided below the clamping portion 33. The lower clamping portion 35b has a U-shaped cross section that clamps the main beam of the cable rack from below on the C-shaped opening side of the main body 31 and covers the tip of the main body 31. The lower clamping portion 35b is fixed by a male screw 24 of the connecting portion 20 that penetrates the lower clamping portion 35b from its lower surface and fits into a female screw 36. The position of the lower clamping portion 35b can be adjusted by the degree to which the male screw 24 is tightened, thereby adjusting the width of the space S in which the main beam of the cable rack is clamped.

[0039] The female thread 36 is provided at the tip of the main body 31, above the lower clamping portion 35b. The female thread 36 is a tall nut welded inside the main body 31. The male thread 24 of the connecting means 20 is fitted into the female thread 36.

[0040] <Method for attaching rollers for cable laying> A method for attaching cable laying rollers using the cable laying roller attachment device 1 according to this embodiment will be described. Figure 7 is a flowchart showing the method for attaching cable laying rollers using the cable laying roller attachment device 1 according to this embodiment. Figure 8 shows the process of attaching the cable laying roller device 30 to a cable rack using the cable laying roller attachment device 1 according to this embodiment, and Figure 9 shows the cable laying roller device 30 attached to the cable rack.

[0041] First, as shown in Figure 7, a pilot wire for pulling the new communication cable is set on the cable laying roller device 30 (step S11). The pilot wire is connected to the new communication cable and is used to pull the new communication cable and place it on the roller section 32 of the cable laying roller device 30. The reason the new communication cable is not placed on the roller section 32 from the beginning is that the new communication cable is heavy, and if it is placed on the roller section 32, it will be difficult to lift the cable laying roller device 30.

[0042] Next, the cable laying roller device 30 is connected to the cable laying roller mounting fixture 1 (step S12). Specifically, the male thread 24 of the connection part 20 is fitted into the female thread 36 of the cable laying roller device 30. At this time, the tightening of the male thread 24 is left loose so that the width of the clamping part 33 can be adjusted later.

[0043] Subsequently, the convex portion 12 of the operating rod 10 is fitted into the concave portion 22 of the connecting portion 20. Specifically, the projection 13 enters from the opening of the groove 23 along the first portion and reaches the end of the first portion. Then, by rotating the operating rod 10 in the circumferential direction, the projection 13 enters along the second portion, thereby connecting the operating rod 10 and the connecting portion 20.

[0044] Next, the cable laying roller device 30 is attached to the cable rack (step S13). Specifically, as shown in Figures 8 and 9, the operating rod 10 of the cable laying roller mounting fixture 1 to which the cable laying roller device 30 is connected is lifted and the clamping portion 33 is attached to the cable rack. At this time, the upper clamping portion 33a is hooked from the upper side of the main beam of the cable rack. Then, by rotating the operating rod 10 in the circumferential direction, the male screw 24 of the connecting portion 20 is tightened, the position of the lower clamping portion 33b is adjusted, and the main beam of the cable rack is clamped. When the operating rod 10 is rotated in the circumferential direction, the projection 13 of the operating rod 10 rotates circumferentially only along the second portion of the groove 23 of the connecting portion 20 and stops at the end of the second portion. As a result, the rotation between the operating rod 10 and the connecting portion 20 is stopped, and the male screw 24 of the connecting portion 20 can be rotated and tightened against the female screw 36 of the cable laying roller device 30.

[0045] Next, the operating rod 10 is removed from the connecting part 20 (step S14). Specifically, the operating rod 10 is rotated circumferentially along the second part of the groove 23 and pulled downward along the first part of the groove 23, thereby removing the protruding part 12 of the operating rod 10 that is fitted into the recess 22 of the connecting part 20.

[0046] Next, if the installation of all cable laying roller devices 30 is not complete (if NO in step S15), return to step S11 and perform the same work. On the other hand, if the installation of all cable laying roller devices 30 is complete (if YES in step S15), the cable laying roller installation work is completed, and then the newly installed communication cable is connected to the pilot wire and pulled.

[0047] <Summary> As described above, the cable laying roller mounting device 1 in this embodiment has an operating rod 10 and a connecting part 20, and the operating rod 10 and the cable laying roller device 30 are connected via the connecting part 20. This allows a worker on the ground to easily attach the cable laying roller device 30 to a cable rack at a high place by operating the operating rod 10. Therefore, climbing up and down ladders and working at heights are unnecessary, making it possible to improve work efficiency while ensuring worker safety. In addition, since the cable laying work itself can be done by one person, it can also contribute to labor savings.

[0048] Furthermore, in this embodiment, the connection between the connecting part 20 and the operating rod 10 is via a recess 22 and a protrusion 12, while the connection between the connecting part 20 and the cable laying roller device 30 is via a male screw 24 and a female screw 36, with each connection method being different. This makes it possible to perform each connection and disconnection operation without interference between the connections.

[0049] Furthermore, in the cable laying roller mounting device 1 of this embodiment, the operating rod 10 and the connecting part 20 are separated, and when the cable laying roller device 30 is attached to the cable rack, only the connecting part 20 is connected to the cable laying roller device 30. Therefore, since the operation of attaching multiple cable laying roller devices 30 to the cable rack can be performed with a single operating rod 10, the transport of the device to the work site is easy.

[0050] (modified version) In the above embodiment, the main body 11 of the operating rod 10 was formed from a single rod-shaped member, but the present invention is not limited thereto. For example, the main body 11 may be configured to be extendable and retractable in the longitudinal direction, and a handle that can be gripped by an operator may be provided at the base end of the main body 11. This makes it easier to work according to the height of the cable rack and further reduces the burden on the operator.

[0051] In the above embodiment, the operating rod 10 and the connecting part 20 are connected by a convex portion 12 and a concave portion 22. However, the present invention is not limited to this, and any connection that is detachable and can be connected and disconnected without interfering with the connection between the connecting part 20 and the cable laying roller device 30 is acceptable. For example, a configuration in which hooks are provided on the tip of the operating rod 10 and the tip of the connecting part 20, respectively, may be used.

[0052] In the above embodiment, the groove 23 of the connecting portion 20 is configured in an L-shape, but is not limited to this. For example, the groove 23 may be T-shaped. This allows the projection 13 to be hooked into the second part of the groove 23 when tightening or loosening the male screw 24, preventing the operating rod 10 from falling out of the connecting portion 20.

[0053] In the above embodiment, the roller portion 32 was supported so as to be movable along the C-shaped opening of the main body 31, but it is not limited to this. The roller portion 32 may be supported on the opposite side of the C-shaped opening of the main body 31. This means that when the cable laying roller device 30 is attached to the main beam of the cable rack, the roller portion 32 will be positioned on the opposite side of the main beam, allowing for more flexibility in changing the cable installation location when pulling in cables.

[0054] In the above embodiment, the cable laying roller device 30 has a roller section 32 composed of a J-shaped shaft 32a and a plurality of rollers 32b, but is not limited to this. For example, the cable laying roller device 30 can be attached to a cable rack by fitting the male screw 24 of the connecting section 20, and the roller section 32 may be composed of a single pulley or the like.

[0055] In the above embodiment, a pilot wire was set in step S11 as a method for attaching the cable laying roller, but this is not the only method. For example, the pilot wire may be set after all cable laying roller devices 30 have been installed (after step S15). Alternatively, in step S11, a new communication cable may be set from the beginning instead of a pilot wire.

[0056] In the above embodiment, the cable laying roller device 30 was attached to the main beam of the cable rack, but the present invention is not limited thereto. The object to which the cable laying roller device 30 is attached can be anything that can be fixed by the clamping portion 33, for example, accessories or supports of the cable rack.

[0057] The above embodiment focused on the laying of indoor communication cables, but the present invention is not limited to this. For example, electric wires, which are an example of cables, may also be the subject of the laying work.

[0058] While several embodiments of this disclosure have been described above, these embodiments can be implemented in a variety of other forms, and various omissions, substitutions, and modifications are permitted without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims and their equivalents.

[0059] <Note> The details described in each of the above embodiments are noted below.

[0060] (Note 1) An operating rod for operating a cable-laying roller, which can be attached to an object located at a high place, to be attached to the said object, A connecting part whose tip is detachably connected to the tip of the operating rod and whose base end is detachably connected to the wire-laying roller, A roller mounting device for cable laying that includes the following features.

[0061] (Note 2) A recess is provided at the tip of the aforementioned connecting portion. The tip of the operating rod is provided with a protrusion that fits into the recess of the connecting portion. A roller mounting device for cable laying according to claim 1.

[0062] (Note 3) An L-shaped groove is provided on the side surface of the recess of the connecting portion. The side surface of the convex portion of the operating rod is provided with a projection that is movable and connectable along the groove. A roller mounting device for cable laying according to claim 2.

[0063] (Note 4) The base end of the connection portion is provided with a male thread that fits into a female thread provided on the wire-laying roller. A roller mounting device for cable laying according to any one of claims 1 to 3.

[0064] (Note 5) The width of the clamping portion of the wire-laying roller is adjusted by tightening the male screw of the aforementioned connecting portion. A roller mounting device for cable laying according to claim 4.

[0065] (Note 6) The aforementioned mounting target is a cable rack. By tightening the male screw at the aforementioned connection point, the width of the clamping portion of the cable-laying roller is adjusted to match the width of the main beam of the cable rack. A roller mounting device for cable laying according to claim 5.

[0066] (Note 7) A method for attaching a wire-laying roller using the wire-laying roller attachment device described in Claims 1 to 3, The steps include connecting the wire-laying roller to the wire-laying roller mounting device, The steps include attaching the wire-laying roller to the object to be mounted, A method for mounting rollers for cable laying, including the method described above. [Explanation of symbols]

[0067] 1. Roller mounting device for cable laying 10...operation rod 11. Main unit 12···Convex part 13...Protrusion 20...Connection part 21...Main unit 22...recess 23...Groove 24...male thread 30. Roller device for cable laying 31...Main unit 32...Roller section 32a...axis 32b...Laura 33... Clamping part 34. Protective material 35a... Upper clamping section 35b...Lower clamping section 36...female thread S...space

Claims

1. An operating rod for operating a cable-laying roller, which can be attached to an object located at a high place, to be attached to the said object, A connecting part whose tip is detachably connected to the tip of the operating rod and whose base end is detachably connected to the wire-laying roller, A roller mounting device for cable laying that includes the following features.

2. A recess is provided at the tip of the aforementioned connecting portion. The tip of the operating rod is provided with a protrusion that fits into the recess of the connecting portion. A roller mounting device for cable laying according to claim 1.

3. An L-shaped groove is provided on the side surface of the recess of the connecting portion. The side surface of the convex portion of the operating rod is provided with a projection that is movable and connectable along the groove. A roller mounting device for cable laying according to claim 2.

4. The base end of the connection portion is provided with a male thread that fits into a female thread provided on the wire-laying roller. A roller mounting device for cable laying according to any one of claims 1 to 3.

5. The width of the clamping portion of the wire-laying roller is adjusted by tightening the male screw of the aforementioned connecting portion. A roller mounting device for cable laying according to claim 4.

6. The aforementioned mounting target is a cable rack. By tightening the male screw at the aforementioned connection point, the width of the clamping portion of the cable-laying roller is adjusted to match the width of the main beam of the cable rack. A roller mounting device for cable laying according to claim 5.

7. An operating rod for operating a cable-laying roller, which can be attached to an object located at a high place, to be attached to the said object, A connecting part whose tip is detachably connected to the tip of the operating rod and whose base end is detachably connected to the wire-laying roller, A method for attaching a wire-laying roller using a wire-laying roller attachment device, The steps include connecting the wire-laying roller to the wire-laying roller mounting device, The steps include attaching the wire-laying roller to the object to be mounted, A method for mounting rollers for cable laying, including the method described above.

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