Pipe coiling correction jig

Abstract

This invention provides a pipe coiling correction jig that can be attached to resin pipes connected to sprinkler heads, making it easy to correct the coiling of the pipes. [Solution] The pipe coiling correction jig 10 comprises a torsion section 14 that generates a corrective force to correct coiling, and a pair of winding sections 16a and 16b integrally formed on both sides of the torsion section 14 via connecting sections 12a and 12b, and wound around and fixed to the pipe 20. The pair of winding sections 16a and 16b have a pair of axes that are substantially in the same direction, and the axis of the torsion section 14 is formed in a direction substantially perpendicular to the pair of axes. Before being attached to the pipe 20, the winding sections 16a and 16b are in a closed state relative to the torsion section 14, and when attached to the pipe 20, they are fixed to the pipe 20 in an open state relative to the torsion section 14. In addition, lever sections 18a and 18b that change the diameter of the spring may be integrally formed on the winding sections 16a and 16b.

Description

Technical Field

[0001] The present invention relates to a pipe curl correction jig for correcting the curl of a pipe formed in a loop shape and cut to a predetermined length.

Background Art

[0002] Conventionally, a resin pipe to which a sprinkler head of sprinkler fire-fighting equipment is connected is formed into a loop shape with a radius of about 4 meters, for example, by a pipe manufacturing apparatus, and then cut to a predetermined length, for example, about several meters. Further, a head member is attached to the tip of the cut pipe, and it is shipped in a state of being wound in a loop shape and carried into a construction site.

[0003] By the way, a pipe formed in a loop shape and cut to a predetermined length is used for sprinkler fire-fighting equipment. However, a resin pipe with a head member attached to its tip has a curl generated during the manufacturing process. If the pipe is curved due to the curl, when connecting the pipe to a sprinkler head arranged on the ceiling or the ceiling surface, an operator needs to straighten the curl to make it a straight pipe.

[0004] Therefore, as shown in Fig. 4(A), conventionally, an operator first inserts a loop-shaped pipe 20 into an iron pipe 24 or the like in the direction of arrow A, and forcibly bends it to straighten the curl to make it a straight pipe, and then turns it in the direction of B and bends it back.

[0005] After that, as shown in Fig. 4(B), the pipe 20 and the head member 22 are immediately fixed with brackets 28 and 30 and a square bar (square pipe) 26. This requires labor and deteriorates workability. After this, the square bar 26 is fixed to a base member on the ceiling back side or the ceiling surface side, for example, an angle member.

[0006] In addition, a curl correction device for correcting the curl of a synthetic resin pipe has been proposed, and an operator uses the curl correction device to remove the curl of the pipe, improving the workability of pipe construction (Patent Document 1).

Prior Art Documents

[0007] [Patent Document 1] Japanese Patent Publication No. 2005-131826 [Overview of the project] [Problems that the invention aims to solve]

[0008] However, the resin pipes used in sprinkler fire extinguishing systems are cut into lengths of a few meters, have head components attached to the ends, and are shipped and delivered to construction sites in a looped shape. It is difficult for workers to bring equipment to the construction site to straighten the pipes and perform the straightening work.

[0009] Therefore, conventionally, workers had to fix two straightening jigs to angle materials installed on the ceiling surface or above the ceiling, and then fix the pipe ends to the two straightening jigs so that they were straight. This process of attaching the straightening jigs and then attaching and fixing the pipes to the jigs was time-consuming and laborious, worsening work efficiency.

[0010] The present invention aims to provide a pipe coiling correction jig that can be attached to resin pipes connected to sprinkler heads, thereby easily correcting the coiling of the pipes. [Means for solving the problem]

[0011] (Pipe coiling correction jig) This invention is a pipe coiling correction jig for correcting the coiling of resin pipes, A torsion coil spring section that generates a corrective force to correct the curling, A pair of winding spring sections are integrally formed on both sides of the torsion coil spring section via torsion connecting sections, and are wound around and fixed to the piping. It is characterized by having the following features.

[0012] (Positional relationship between the torsion spring section and the coiled spring section) The torsion spring section is formed such that the axis of the coil section is oriented in a direction approximately perpendicular to the axes of both coil sections.

[0013] In a pair of coiled spring sections, the axes of both coil sections are oriented in approximately the same direction.

[0014] Alternatively, in a pair of coiled spring sections, the axis of each coil section is approximately in the same direction as the axis of each torsion coupling section.

[0015] (Initial jig shape before pipe installation and shape when the device is in use) The pair of coiled spring sections are Before attaching it to the piping, it is in a closed position relative to the torsion coil spring section. When attached to a pipe, it is fixed to the pipe in an open position relative to the torsion coil spring.

[0016] (Operating lever to change the diameter of the winding spring section) The coiled spring section has an integrated operating lever section for changing the diameter of the spring. [Effects of the Invention]

[0017] (Effect of pipe coiling correction jig) This invention is a pipe coiling correction jig for correcting the coiling of resin pipes, comprising a torsion spring section that generates a corrective force to correct the coiling, and a pair of winding spring sections integrally formed on both sides of the torsion spring section via torsion connecting sections, which are wound around and fixed to the pipe. By attaching it to resin pipes connected to sprinkler heads, it becomes possible to easily correct the coiling of the pipes.

[0018] (Effect of the positional relationship between the torsion spring section and the coiled spring section) Because the torsion spring section is formed with the axis of the coil section oriented approximately perpendicular to the axes of both coil sections, it becomes possible to easily manufacture a pipe coiling correction jig.

[0019] The pair of winding spring parts are such that the axes of both coil parts are in substantially the same direction, or the axis of each coil part is substantially in the same direction as each of the axes of the torsion connecting parts.

[0020] (Effect of the initial shape of the jig before pipe installation and the shape at the time of the device) Also, before being attached to the pipe, the pair of winding spring parts are in a closed state with respect to the torsion winding spring part, and when attached to the pipe, they are fixed to the pipe in an open state with respect to the torsion winding spring part, so that the pipe winding correction jig can be easily attached to the pipe.

[0021] (Effect of the operation lever for changing the diameter of the winding spring part) In addition, since the winding spring part is integrally formed with an operation lever part for changing the diameter of the spring, the pipe winding correction jig can be easily attached to a curved pipe.

Brief Description of the Drawings

[0022] [Figure 1] It is an explanatory diagram showing the initial state of a pipe winding correction jig for correcting the winding of a pipe. [Figure 2] It is an explanatory diagram showing the mounted state of the pipe winding correction jig. [Figure 3] It is an explanatory diagram showing another embodiment of the pipe winding correction jig. [Figure 4] It is an explanatory diagram showing a conventional method for correcting the kink of a pipe.

Modes for Carrying Out the Invention

[0023] Hereinafter, embodiments of the pipe winding correction jig according to the present invention will be described in detail based on the drawings. Note that the present invention is not limited by the following embodiments.

[0024] [Basic Concept of the Embodiment] First, the basic concept of the embodiment will be described. The embodiment generally relates to a pipe winding correction jig for correcting the winding of a resin pipe installed in a building.

[0025] Here, "piping" refers to piping installed in the ceiling space or on the ceiling surface of buildings such as large facilities and parking lots, and is mainly connected to sprinkler heads that activate in the event of a fire in a sprinkler fire extinguishing system. It also includes various types of piping other than those for sprinkler heads that activate in the event of a fire. In this embodiment, the piping for sprinkler heads that activate in the event of a fire will be used as an example.

[0026] Furthermore, "resin-made" piping refers to, for example, synthetic resin, which is molded in a factory into a loop shape with a radius of approximately 4 meters, then cut to a predetermined length, such as several meters, and then a head component is attached to the end of the cut piping, which is then wound into a loop shape and shipped with a coiled shape.

[0027] Here, "curl" refers to the curvature of pipes that occurs during the manufacturing process. When connecting pipes to sprinkler heads located in the ceiling or on the ceiling surface, workers need to straighten the coils to make them straight. For this reason, coil-correcting devices have been proposed, but these devices are too large for workers to carry to construction sites.

[0028] Here, "straightening" refers to the process of workers easily correcting the curl of a curved resin pipe at the construction site to make it a straight pipe.

[0029] Furthermore, a "sprinkler head" is a device that, when subjected to the hot airflow of a fire, melts a fusible alloy in its heat-sensitive activation part, causing the heat-sensitive activation part to thermally decompose, opening the valve body and simultaneously causing the deflector to fall downwards, thereby releasing fire-fighting water. Note that sprinkler heads come in closed and open types, but either type is acceptable in this embodiment.

[0030] The "torsion coil spring section" is located on the outside of the resin pipe after the pipe coiling correction jig is installed, and is a torsion coil spring. The inner diameter, number of turns, and winding method of the coil section of the torsion coil spring section are arbitrary, for example, tightly wound. In addition, the torsion coil spring section may have a rubber jacket if necessary.

[0031] The "pair of coiled springs" are located on the inside of both sides of the resin pipe after the pipe coiling correction jig is installed, and are tension coil springs or compression coil springs. The winding direction of the coils of the pair of coiled springs can be the same or opposite. Also, the number of turns and winding method of the coils of the coiled springs are arbitrary, for example, spaced winding.

[0032] Furthermore, the winding spring section is fixed in a way that tightens around the pipe, and the inner diameter of the coil section must be smaller than the outer diameter of the pipe. However, the inner diameter is arbitrary; for example, if the outer diameter of the resin pipe is φ27, the inner diameter of the coil section of the winding spring section will be φ23 to φ25.

[0033] Furthermore, the "operating lever section" is formed on the winding spring section, and by widening the spring diameter of the coil section of the winding spring, it becomes easier to attach the pipe coiling correction jig. The operating lever section can be located at the beginning or end of the winding of the coil section of the winding spring, or on both sides.

[0034] The following describes a specific embodiment. In the specific embodiment shown below, we will describe the case where the "torsion coil spring section" is the "torsion section," the "torsion connecting section" is the "connecting section," the "winding spring section" is the "winding section," and the "operating lever section" is the "lever section."

[0035] [Specific details of the embodiment] This section describes a specific embodiment of the pipe coiling correction jig. The details are explained in the following sections. a. Configuration of the pipe coiling correction jig b. Installation of pipe coiling correction jig c. Modified form of the present invention

[0036] [a. Configuration of the pipe coiling correction jig] First, the configuration of the pipe coiling correction jig will be explained. In this explanation, refer to Figure 1, which shows the initial appearance of the pipe coiling correction jig used to correct the coiling of pipes. Figure 1(A) shows the front view of the pipe coiling correction jig, and Figure 1(B) shows its side view.

[0037] As shown in Figure 1, the pipe coiling correction jig 10 consists of a connecting section 12, a torsion section 14, a winding section 16, and a lever section 18, and is made of spring steel wire or stainless steel wire. The pair of connecting sections 12 consists of a connecting section 12a and a connecting section 12b, and the pair of winding sections 16 consists of a winding section 16a and a winding section 16b.

[0038] In this embodiment, the connecting portion 12a and the connecting portion 12b are substantially parallel, and the winding portion 16a and the winding portion 16b are positioned on both sides of the torsion portion 14, that is, at the beginning and end of the winding of the torsion portion 14, and the axes of their coil portions are substantially parallel, that is, substantially parallel to the connecting portion 12a and the connecting portion 12b. Note that the axes of the coil portions of the connecting portion 12 and the winding portion 16 do not have to be parallel, and they may be acute or obtuse, and the winding directions of the pair of winding portions 16 may be the same or opposite.

[0039] In this embodiment, the lever portion 18 is attached to the end of the coil portion of the winding portion 16, but this lever portion 18 does not have to be on the pipe winding curvature correction jig 10, it may be attached to the beginning of the coil portion of the winding portion 16, or it may be attached to both the beginning and end of the coil portion.

[0040] [b. Installation of pipe coiling correction jig] Next, we will explain how to install the pipe coiling correction jig. For this explanation, please refer to Figure 2, which shows the installation of the pipe coiling correction jig. Figure 2(A) shows the state immediately after installation of the pipe coiling correction jig shown in Figure 1, and Figure 2(B) shows the subsequent state after the pipe has been straightened.

[0041] As shown in Figure 2, the resin pipe 20 (φ27) is cut to a predetermined length and then wound into a loop. A pipe coiling correction jig 10 is attached to one end of the pipe 20, and then the head member 22 is attached before shipment and delivery to the construction site. In this embodiment, as shown in Figure 2(B), the part of the pipe 20 where the head member 22 is attached becomes straight (a straight pipe).

[0042] To install it, first, as shown in Figure 2(A), the operator operates the lever 18a to widen the diameter of the coil portion of the winding section 16a of the pipe coiling correction jig 10 and assembles it onto the pipe 20. Next, the operator positions the torsion section 14 on the outside of the pipe 20 and operates the lever 18b to widen the diameter of the coil portion of the winding section 16b and assembles it onto the pipe 20. The winding sections 16a and 16b are then fixed together to tighten around the pipe 20.

[0043] In this case, even if the pipe 20 is bent, if tension (corrective force) is applied when the connecting parts 12a and 12b of the pipe coiling correction jig 10 are opened, that tension acts in the direction of correcting the coiling, thus reducing the effort required by the worker to straighten the pipe 20.

[0044] Furthermore, as shown in Figure 2(B), if the tip of the pipe 20 is a straight pipe, the labor required is eliminated, and since the straight pipe section is, for example, about 30 centimeters long, it does not get in the way even when the head member 22 is attached and shipped. The method of assembling the head member 22 is arbitrary.

[0045] [d. Variations of the present invention] Modified versions of the pipe coiling correction jig according to the present invention will now be described. In addition to the embodiments described above, the pipe coiling correction jig of the present invention includes the following modifications. In this description, refer to Figure 3, which shows other embodiments of the pipe coiling correction jig. Figures 3(A) and 3(B) show other embodiments of the pipe coiling correction jig of Figure 1.

[0046] As shown in Figure 3, the axes of the connecting portion 12 and the coil portion of the winding portion 16 are not parallel but at an acute angle. Also, the winding portions 16a and 16b are located on both sides of the torsion portion 14, that is, at the beginning and end of the winding, and as shown in Figure 3(A), the axes of their coil portions are approximately parallel, but this does not have to be approximately parallel, and as shown in Figure 3(B), they may be approximately parallel to the connecting portions 12a and 12b, as in Figure 1(A).

[0047] (others) Furthermore, this invention is not limited to the embodiments described above, and includes appropriate modifications that do not impair its purpose and advantages, and is not limited by the numerical values ​​shown in the embodiments described above. [Explanation of symbols]

[0048] 10, 40, 50: Pipe coiling correction jig 12,12a,12b: Connection part 14: Torsion section 16, 16a, 16b: Wrapping section 18, 18a, 18b: Lever section 20: Piping 22: Head component 24: Iron pipe 26: Corner bar 28,30: Bracket

Claims

1. A pipe coiling correction jig for correcting the coiling of resin pipes, A torsion coil spring section that generates a corrective force to correct the aforementioned coiling tendency, A pair of winding spring sections are integrally formed on both sides of the aforementioned torsion coil spring section via torsion connecting sections, and are wound around and fixed to the piping. A pipe coiling correction jig characterized by having the following features.

2. A pipe coiling correction jig according to claim 1, The pipe coiling correction jig is characterized in that the torsion coil spring portion is formed in a direction in which the axis of the coil portion is substantially perpendicular to the axes of both coil portions.

3. A pipe coiling correction jig according to claim 2, The pipe coiling correction jig is characterized in that the axes of both coil sections of the pair of coiled spring sections are in substantially the same direction.

4. A pipe coiling correction jig according to claim 2, The pipe coiling correction jig is characterized in that the axis of each coil portion of the pair of coiled spring portions is in substantially the same direction as the axis of each of the torsion connecting portions.

5. A pipe coiling correction jig according to claim 1, The pair of winding spring sections are, Before being attached to the aforementioned piping, it is in a closed state relative to the torsion coil spring portion. A pipe coiling correction jig characterized in that, when attached to the pipe, it is fixed to the pipe in an open state relative to the torsion coil spring portion.

6. A pipe coiling correction jig according to claim 1, The pipe coiling correction jig is characterized in that the winding spring portion has an operating lever portion for changing the diameter of the spring integrally formed with it.

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