Steel pipe shipping method

Abstract

To provide a shipping method of a steel tube which can appropriately apply curing to a tip of the steel tube with less processes, and after shipping, reduces a burden of removal and disposal of a component used in the curing.SOLUTION: A method of applying curing to a tip of a steel tube 1 and shipping it, includes the steps of preparing a plate material 2 having a size approximately equal to a size of the tip 11, and removably attaching the plate material 2 to the tip 11.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a method for shipping steel pipes employed in, for example, building construction.

Background Art

[0002] Conventionally, pipes employed in building construction have various types and uses, such as steel or resin, for water supply / drainage or exhaust. Depending on the type and use, there is a timing when curing of the tip portion of the pipe is necessary. For example, Patent Document 1 discloses a curing cap made of rubber or synthetic resin that is detachably attached to the tip portion that becomes the pipe body opening of a drain pipe that is piped during waterworks construction and is temporarily in an open state.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, since the curing cap described in Patent Document 1 is attached so as to cover the tip portion, the periphery of the tip portion becomes thick and bulky, making it unsuitable for curing the pipe before shipment. Further, since the above-mentioned curing cap is made of a material that is easily elastically deformed, it is difficult to dispose of after shipment. That is, when curing the tip of the pipe for shipment, a method should be adopted that does not increase the outer diameter and that easily disposes of the members used for curing. And in particular, for steel pipes, since the specific gravity is higher than that of resin pipes, they should be cured with lightweight and less breakable materials.

[0005] Therefore, an object of the present invention is to provide a method for shipping steel pipes that accurately cures the tip portion of the steel pipe in a small number of steps and reduces the load of removing and disposing of the members used for curing after shipment.

Means for Solving the Problems

[0006] That is, the method for shipping a steel pipe in the present invention is a method of curing and shipping the tip of the steel pipe, characterized by including a step of preparing the plate material and a step of detachably attaching the plate material to the tip without fitting it. a plate material having a size approximately matching the above tip portion The plate material has a stepped portion formed to be smaller than the opening of the tip, and the shipping method preferably includes a step of abutting the plate material against the tip so that the stepped portion is located inside the opening.

[0007] The plate material has rib portions formed radially toward the peripheral edge, and the shipping method preferably includes a step of abutting the plate material against the tip via the rib portions. the step portion is formed with a depth of 1 / 100 to 1 / 10 of the diameter of the plate material, The shipping method the above The stepped portion of the tip portion is preferably located inside the opening the above and the plate material is abutted against the tip.

[0008] the above The plate material preferably has rib portions formed radially toward the peripheral edge, and the shipping method preferably includes a step of abutting the plate material against the tip via the rib portions. the rib portion is formed in a convex shape protruding from the surface of the plate material or a wavy shape protruding on both the front and back surfaces, The shipping method the above via the rib portions the above the plate material the above is preferably abutted against the tip.

[0009] the above The plate material is preferably formed of a pulp material, a resin material, or a mixture thereof.

[0010] in the above shipping method, with the plate material in contact with the tip portion, attach the plate material to the steel pipe removably with a curing tape is desirable.

Advantages of the Invention

[0011] According to the present invention, not only can the tip of the steel pipe be accurately cured with fewer steps, but also the load of removing and disposing of the members used for curing after shipping can be reduced, so that an effect of improving the construction efficiency of the steel pipe for buildings can be expected.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

Embodiments for Carrying out the Invention

[0013] Hereinafter, with reference to FIGS. 1 and 2, a method for shipping steel pipes in an embodiment of the present invention (hereinafter also referred to as "this shipping method") will be described. In these figures, for the same parts that exist in plural, there are also parts numbered only for one part. For convenience of explanation, there are also parts where a predetermined part and the lead-out line of this part are indicated by a hidden line (broken line). In the description, terms indicating directions such as upward, downward, sideward, vertical direction, and horizontal direction are basically based on a substantially horizontal floor or ground.

[0014] <Overview of This Shipping Method> This shipping method cures the tip of a steel pipe with a thickness of 0.1 mm to 2 mm used in the construction of buildings, such as spiral steel pipes (hereinafter also referred to as "spiral ducts"), electric resistance welded steel pipes, seamless steel pipes, and plate-wound (bending) steel pipes, and is adopted when transporting from a certain place including the manufacturing site to the construction site. Preferably, it is adopted when transporting relatively lightweight and thin-walled steel pipes such as spiral ducts, and may be adopted when transporting not only so-called round ducts but also square ducts. "Buildings" include, for example, apartment houses, detached houses, temporary houses, schools, hospitals, elderly facilities, disabled facilities, and various commercial facilities, and the structure and size such as reinforced concrete structures, steel frame structures, and wooden structures are not limited.

[0015] A "spiral duct" is a steel pipe with a circular cross-section manufactured by spirally winding a strip-shaped zinc steel plate with a width of 50 mm to 200 mm and a thickness of 0.2 mm to 1.5 mm, and caulking both ends of the overlapping strip steel in a lap joint to a predetermined length. The caulked part is formed in a spiral shape to enhance the strength of the steel pipe. For example, it is used as a ventilation duct for kitchens, bathrooms, and toilets in apartment houses, a heating and cooling duct for each room, and a dust collection duct for various commercial facilities. The inner diameter may be determined according to the application.

[0016] <Basic Processes and Effects of This Shipping Method> As shown in FIGS. 1(a) and 2, a shipping method is adopted for the spiral duct 1, which includes a preparation step of preparing a plate material 2 having a size substantially matching the tip portion 11, and an attachment step of detachably attaching the plate material 2 to the tip portion 11. The diameter of the spiral duct 1 including the tip portion 11 may be 50 mm to 1000 mm, preferably 75 mm to 200 mm, more preferably 100 mm to 150 mm. According to this method, not only can the tip portion 11 be accurately cured in the shortest working process without the peripheral edge of the plate material 2 protruding outside the tip portion 11 of the spiral duct 1, but also the plate material 2 and other materials used for curing can be quickly unloaded at the destination, so that an effect of improving the construction efficiency of the steel pipe for the building can be expected.

[0017] As shown in FIG. 1(b), the cured spiral duct 1 may be shipped as a group of spiral ducts bundled together with, for example, binding bands. The spiral duct 1 or the group of spiral ducts may be packed in a cardboard box and shipped. Another spiral duct 1 with a length substantially equal to and a smaller diameter than that of the spiral duct 1 may be inserted into the spiral duct 1, and the exposure of the inner spiral duct 1 can be prevented by the plate materials 2 attached to both.

[0018] <Details of the Plate Material 2> The plate material 2 is formed using pulp material, resin material, or a mixed material thereof as the raw material, and is preferably a pulp material or a mixed material with a high proportion of pulp material that is relatively inexpensive in terms of manufacturing cost, lightweight, and difficult to break. The plate material 2 may be formed by cutting a plate material of a predetermined size one by one, formed one by one by injection molding, or formed one by one using a predetermined mold after cutting a plate material of a predetermined size. The plate material 2 has a thickness of 0.3 mm to 3 mm, and preferably has a thickness of 0.5 mm to 2 mm considering the strength suitable for curing the tip portion 11 of the spiral duct 1 and the raw material cost. The plate material 2 may have a coding layer of a predetermined component on the surface to prevent damage by the tip portion 11 of the spiral duct 1 and softening by moisture. The plate material 2 may have a diameter equal to or greater than the outer diameter of the tip portion 11 of the spiral duct 1, or may have a diameter smaller than the outer diameter to the extent that it abuts against the tip portion 11.

[0019] <Details of the preparation process> The preparation process may include all of a manufacturing process for manufacturing the plate material 2 to a size substantially matching the tip portion 11 of the spiral duct 1, a purchasing process for purchasing the manufactured plate material 2, and a providing process for providing the purchased plate material 2 to the mounting process. It may include the purchasing process and the providing process excluding the manufacturing process, or may include only the providing process excluding the manufacturing process and the purchasing process. In the manufacturing process, the plate material 2 may be obtained by cutting a plate material of a predetermined size, the plate material 2 may be obtained by injection molding, or the plate material 2 may be obtained by molding a plate-like member obtained by cutting the above plate material with a predetermined mold. In the purchasing process, the plate materials 2 may be purchased one by one or in a plurality at a time. In the providing process, the packaged plate material 2 may be opened and taken out, or the plate materials 2 may be taken out one by one from a state where a plurality are stacked.

[0020] <Details of the mounting process> The attachment process may include a contact process of bringing the plate material 2 shown in Fig. 2(a) into contact with the tip 11 of the spiral duct 1, and a fixing process of fixing the plate material 2 in contact with the tip 11 to the spiral duct 1 with a removable adhesive member 3 shown in Fig. 2(b). The contact process may be performed by moving the plate material 2 to the tip 11 of the spiral duct 1 by a predetermined mechanical device or by a worker. The adhesive member 3 used in the fixing process may be a so-called cross-type curing tape or a film-type curing tape with an adhesive applied on one side, and preferably one that is less likely to leave peeling marks on the surface of the spiral duct 1. In the fixing process, the adhesive member 3 is affixed longitudinally so as to cross and / or longitudinally cross from the surface of the plate material 2 to the spiral duct 1 with respect to one or both of the tips 11 of the spiral duct 11, but the adhesive member 3 may be affixed shorter from the edge of the surface of the plate material 2 to the spiral duct 1.

[0021] Next, while referring to Figs. 3 and 4, a different shipping method in an embodiment of the present invention will be described, and parts that are different from the above-described shipping method will be explained, and explanations of equivalent parts will be omitted. Parts or sites equivalent to those shown in Fig. 2 are numbered by adding 100 and 200 uniformly in Figs. 1 and 2 in Figs. 3 and 4 for easy reference.

[0022] As shown in Fig. 3, the plate material 102 has a stepped portion 121 formed to be smaller than the opening 11a of the tip 11 of the spiral duct 1. In the contact process included in the attachment process, the plate material 102 is brought into contact with the tip 11 so that the stepped portion 121 is positioned inside the opening 11a. According to this method, since the stepped portion 121 serves as a mark, it is difficult to misalign the attachment direction of the plate material 102, and since the stepped portion 121 fits inside the spiral duct 1, it becomes easier to determine the position of the plate material 102 with respect to the tip 11.

[0023] <Details of the plate material 102> The plate material 102 has a flat stepped portion 121, an unnamed inclined surface portion formed continuously outward from the periphery of the stepped portion 121, and an unnamed flat outer end portion formed continuously outward from the periphery of the inclined surface portion. Instead of the inclined surface portion, a substantially vertical side wall portion may be used. The stepped portion 121 is formed in one step at the center of the plate material 102, may be formed in two or more steps, or may be formed in a plurality of pieces surrounding the center. The stepped portion 121 is formed with a diameter that does not fit into the opening 11a of the tip portion 11 of the spiral duct 1, so that the plate material 102 can be easily removed at the shipping destination without applying excessive force. The stepped portion 121 is formed with a depth of 1 / 100 to 1 / 10 of the diameter of the plate material 102, preferably 1 / 90 to 1 / 20, more preferably 1 / 70 to 1 / 30. If the depth is less than 1 / 100, it is too shallow to exhibit the desired effect. If the depth exceeds 1 / 10, the height difference is too large, making it difficult to mold and easily damaged.

[0024] As shown in FIG. 4, the plate material 202 has rib portions 222 formed radially toward the peripheral edge of the unnamed flat outer end portion. In the contact step included in the mounting process, the plate material 202 is brought into contact with the tip portion 11 via the rib portions 222. According to this method, since the rib portions 222 reinforce the outer end portion of the plate material 202 that contacts the tip portion 11 of the spiral duct 1, the plate material 202 is less likely to be damaged.

[0025] <Details of the plate material 202> The rib portions 222 may be formed in a convex shape protruding from the surface of the plate material 202 or in a wavy shape protruding on both the front and back. The rib portions 222 are formed from the unnamed outer end portion to the inclined surface portion, but may be formed only at the outer end portion. The rib portions 222 may have a narrow width or a wide width, and the adjacent rib portions 222 may have a narrow interval or a wide interval compared to the width of the rib portions 222.

[0026] Note that the shipping method of the steel pipe shown in this embodiment is not limited to the above-described content, and may be executed by a process including a predetermined procedure or a material including a relationship between predetermined shapes, dimensions, and parts as long as the same effect can be obtained.

Explanation of Symbols

[0027] 1 Spiral duct, 11 Tip portion, 11a Opening 2, 102, 202 Plate materials, 121 Step portion, 222 Rib portion 3 Curing tape

Claims

1. A method for curing and shipping the tip of a steel pipe with a plate material having a size substantially matching the tip of the steel pipe, comprising: The plate material has a stepped portion formed to a size smaller than the opening of the tip portion, The stepped portion is formed to a depth of 1 / 100 to 1 / 10 of the diameter of the plate material, A step of preparing the plate material; A step of abutting the plate material against the tip portion so that the stepped portion is located inside the opening of the tip portion; A step of detachably attaching the plate material to the tip portion without fitting the plate material into the tip portion; A method for shipping a steel pipe, characterized by including the above steps.

2. A method for curing and shipping the tip of a steel pipe with a plate material having a size substantially matching the tip of the steel pipe, comprising: The plate material has rib portions formed radially toward the peripheral edge, The rib portions are formed in a convex shape protruding from the surface of the plate material or a wavy shape protruding on both the front and back surfaces, A step of preparing the plate material; A step of abutting the plate material against the tip portion via the rib portions; A step of detachably attaching the plate material to the tip portion without fitting the plate material into the tip portion; A method for shipping a steel pipe, characterized by including the above steps.

3. The plate material is formed of a pulp material, a resin material, or a mixture thereof. The method for shipping a steel pipe according to claim 1 or 2, characterized by the above.

4. With the plate material abutted against the tip portion, detachably attach the plate material to the steel pipe with a curing tape. The method for shipping a steel pipe according to any one of claims 1 to 3, characterized by the above.

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