TWI679104B - Tube shaped body - Google Patents

Abstract

The present invention provides a tube formed body capable of improving the stability of the support operation of an article. The tube molded body 1 includes an outermost portion 5 formed by laminating a glass fiber-reinforced resin sheet on the surface side of the base portion 10. The surface of the tube formed body 1 is formed of a glass fiber-reinforced resin having a high electrical resistance, and thereby the surface resistance of the tube formed body 1 can be increased. Therefore, it is possible to prevent the occurrence of sparks even when a charged item is supported. According to the above, it is possible to improve the stability of the support operation of the article.

Description

Tube shaped body

The present invention relates to a tube formed body that supports an article such as when an article is held, transported, or stored.

As a tube shaped article for supporting articles, Japanese Patent Laid-Open No. 2013-10346 describes a support rod made of a fiber-reinforced resin formed into a cylindrical shape having a hollow portion with a substantially square cross section in the axial direction. The support rod is used to support the glass substrate when the glass substrate is stored in a substrate storage box in a manufacturing process of a liquid crystal display (LCD) or the like.

However, in the manufacture of liquid crystal displays and the like, an article (such as a glass substrate) is charged, and when the surface of the tube forming body (ie, the robot arm) holding the article approaches or comes into contact with the article, sparks may occur and the article may break. Situation. Therefore, it is required to prevent the generation of such sparks and improve the stability of the support operation of the articles.

Therefore, an object of the present invention is to provide a formed pipe body capable of improving the stability of the support operation of an article.

One aspect of the present invention is a tube forming system that supports an article, and includes: a base portion composed of a laminated board obtained by laminating a plurality of carbon fiber reinforced resin sheets; and an outermost portion formed on the surface of the base A side-laminated glass fiber reinforced resin sheet is configured.

This tube molded body includes an outermost portion formed by laminating a glass fiber-reinforced resin sheet on the surface side of the base portion. The surface of the tube forming body is made of glass fiber reinforced resin with high resistance By forming it, the surface resistance of the tube formed body can be increased. Therefore, it is possible to prevent the occurrence of sparks even when a charged item is supported. According to the above, it is possible to improve the stability of the support operation of the article.

In another aspect of the present invention, the formed pipe body may have a surface resistance of 1 × 10 ⁶ Ω or more after heat curing. By setting the surface resistance to a sufficiently high value as described above, the reliability of preventing sparks can be improved.

In another aspect of the present invention, the formed tube body may be a resin-based thermosetting resin impregnated with a carbon fiber reinforced resin sheet and a glass fiber reinforced resin sheet. Thereby, the ease of manufacture can be improved.

In another aspect of the present invention, the formed pipe body may have the outermost portion formed over the entire circumference. As a result, the surface resistance can be increased on any surface in the circumferential direction of the tube formed body, and the reliability of preventing spark generation can be improved.

According to the present invention, it is possible to provide a formed pipe body capable of improving the stability of the support operation of an article.

1‧‧‧ tube shaped body

1A‧‧‧on board

1B‧‧‧ Lower plate

1C‧‧‧Side

1D‧‧‧Side panel

1a‧‧‧upper surface

1b‧‧‧ lower surface

1c‧‧‧side

1d‧‧‧side

1e‧‧‧corner

1f‧‧‧ base

1g‧‧‧Top

2‧‧‧ Level 1

2a‧‧‧upper

2b‧‧‧lower

2c‧‧‧side

2d‧‧‧side

3A‧‧‧Level 2

3B‧‧‧Layer 2

4A‧‧‧Level 3

4B‧‧‧Layer 3

5‧‧‧ outermost

5a‧‧‧upper

5b‧‧‧upper

5c‧‧‧side

5d‧‧‧side

6‧‧‧ mandrel

7A, 7B, 7C, 7D

10‧‧‧ base

FIG. 1 is a plan view of a tube formed body according to an embodiment of the present invention.

FIG. 2 is a side view of the formed tube body of FIG. 1. FIG.

Fig. 3 is a cross-sectional view of the formed tube body taken along the line III-III in Fig. 2.

Fig. 4 is a cross-sectional view of a tube formed body in a state where a mandrel and an outer mold are arranged.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the same or corresponding parts are marked with the same symbols in each figure, and repeated descriptions are omitted.

As shown in FIG. 1 and FIG. 2, the tube forming body 1 is a long tube body. For example, in the manufacturing steps of a liquid crystal display, the tube forming body 1 is used to store a glass substrate (article) by a robot or a substrate storing the glass substrate. Boxes, etc., while supporting items such as glass substrates. Yu will with the tube forming body 1 When the length-parallel direction is set to the Y-axis direction, the width of the tube-shaped body 1 in the X-axis direction is fixed, and the width of the tube-shaped body 1 in the Z-axis direction is gradually reduced from the base end 1f toward the top end 1g . However, the shape of the tube forming body 1 is not particularly limited, and the width in the X-axis direction may be gradually reduced, or the width in the Z-axis direction may be linearly extended without gradually decreasing.

As shown in FIG. 3, the tube forming body 1 of this embodiment is a member having a rectangular ring-shaped cross section, and includes an upper plate 1A, a lower plate 1B, and side plates 1C, 1D. The tube formed body 1 includes an upper surface 1a, a lower surface 1b, side surfaces 1c, 1d, and a corner portion 1e. However, the shape of the cross section of the tube formed body 1 is not particularly limited. The tube molded body 1 includes a base portion 10 composed of a laminated plate obtained by laminating a plurality of carbon fiber reinforced resin sheets, and an outermost portion 5 formed by laminating a glass fiber reinforced resin sheet on the surface side of the base portion 10. While posing.

As the carbon fiber reinforced resin sheet constituting the base 10, a fiber reinforced resin sheet such as CFRP (carbon fiber reinforced plastics) is used. As an example, the fiber of the carbon fiber-reinforced resin constituting the base 10 is a PAN (polyacrylonitrile, polyacrylonitrile) -based carbon fiber (tensile elastic modulus: 230 to 600 GPa) or a pitch-based carbon fiber (tensile elastic modulus: 600 to 900 GPa). As the prepreg constituting the carbon fiber reinforced resin sheet, a unidirectional prepreg, a fabric prepreg, or the like is used. Unidirectional prepreg fiber is a prepreg that is oriented in only one direction. It can be used in parts where strength and rigidity are to be obtained. Fabric prepreg systems such as plain woven and diagonal woven prepregs can be used to prevent cracks in the corners of the formed body and prevent burrs in machined parts such as vacuum cushion holes. As the resin impregnated with the carbon fiber-reinforced resin sheet, thermosetting resins such as epoxy resin, phenol resin, cyanate resin, unsaturated polyester resin, polyimide resin, and bismaleimide resin can also be used. Thermoplastic resins such as polyethylene and polypropylene can be used. The fiber basis weight of the carbon fiber reinforced resin sheet may be set to 25 to 500 g / m ² . The resin content of the carbon fiber reinforced resin sheet can be set to 18-50% by weight. The thickness of the carbon fiber reinforced resin sheet can be set to 0.03 to 0.5 mm.

As the glass fiber reinforced resin sheet constituting the outermost part 5, a fiber reinforced resin sheet such as GFRP (glass fiber reinforced plastics) is used. As the prepreg constituting the glass fiber reinforced resin sheet, a unidirectional prepreg, a fabric prepreg, or the like is used. As the resin impregnated with the glass fiber reinforced resin sheet, thermosetting resins such as epoxy resin, phenol resin, cyanate resin, unsaturated polyester resin, polyimide resin, and bismaleimide resin can be used. Thermoplastic resins such as polyethylene and polypropylene can also be used. The fiber basis weight of the glass fiber reinforced resin sheet may be set to 25 to 500 g / m ² . The resin content of the glass fiber reinforced resin sheet can be set to 18 to 50% by weight. The thickness of the glass fiber reinforced resin sheet can be set to 0.03 to 0.5 mm, and preferably 0.1 mm or more.

The base portion 10 constitutes a layer of the upper plate 1A, the lower plate 1B, the side plates 1C, and 1D of the tube molded body 1 by a laminated sheet formed by laminating a plurality of carbon fiber-reinforced resin sheets. In the example shown in FIG. 3, the base portion 10 includes a first layer 2, a second layer 3A, 3B, and a third layer 4A, 4B. The first layer 2 is a layer laminated on the innermost peripheral side of the base portion 10. The first layer 2 constitutes the upper portion 2a, the lower portion 2b, and the side portions 2c, 2d. The upper portion 2a constitutes a portion of the upper plate 1A, the lower portion 2b constitutes a portion of the lower plate 1B, and the side portions 2c, 2d constitute a side plate 1C, Part of 1D. The second layer 3A is a layer formed on the outside of the side portion 2c of the first layer 2 and constituting a part of the second layer 3A. The second layer 3B is a layer formed outside the side portion 2d of the first layer 2 and constituting a part of the second layer 3B. The third layer 4A is a layer formed on the outer side (upper side) of the upper portion 2a of the first layer 2 and constitutes a part of the upper plate 1A. The third layer 4B is a layer formed on the outside (lower side) of the lower portion 2b of the first layer 2 and constitutes a part of the lower plate 1B.

The outermost 5 is a layer formed by layering a glass fiber-reinforced resin sheet on the surface area of the base portion 10. In addition, the surface of the base part 10 means the surface arrange | positioned at the outermost peripheral side among the part which comprises the base part 10. In the present embodiment, the outermost portion 5 is configured by covering the entire periphery of the base portion 10 with a glass fiber-reinforced resin sheet. The outermost portion 5 includes an upper portion 5a that covers the upper surface of the third layer 4A and constitutes a portion of the upper plate 1A, an upper portion 5b that covers the lower surface of the third layer 4B and constitutes a portion of the lower plate 1B, and covers the outside of the second layer 3A The side surface 5c constitutes a part of the side plate 1C and the side portion 5d which covers a side surface of the outer side of the second layer 3B and constitutes a part of the side plate 1D. With this configuration, the outermost portion 5 is formed over the entire periphery of the surface of the tube formed body 1. That is, the outermost part 5 is formed over the entire area of the upper surface 1a, the lower surface 1b, the side surfaces 1c, and 1d (that is, the entire area from the base end 1f to the top end 1g) of the tube forming body 1. In addition, since the outermost surface 5 formed of the laminated glass fiber reinforced resin sheet forms the surface of the tube molded body 1, the surface resistance of the tube molded body 1 (after heat curing) is 1 × 10 ⁶ Ω or more over the entire circumference.

Next, a method for manufacturing the tube formed body 1 according to this embodiment will be described with reference to FIG. 4. First, a mandrel (mandrel) 6 is prepared, and a release agent is coated or sprayed on the surface of the mandrel. Then, a carbon fiber-reinforced resin sheet constituting the first layer 2 is wound around the mandrel 6. Further, a laminated body of carbon fiber reinforced resin sheets constituting the second layers 3A and 3B is attached to the side surface of the first layer 2. Further, a laminated body of a carbon fiber-reinforced resin sheet constituting the third layer 4A was attached to the upper surface of the first layer 2. Further, a laminated body of a carbon fiber-reinforced resin sheet constituting the third layer 4B is attached to the lower surface of the first layer 2. At this time, the corners of the four corners may be pressed against a resin or a metal rod, and the corners may be chamfered or rounded (filled). In the case of chamfering, it is preferably set to C1 or more, and in the case of chamfering, it is preferably set to R1 or more. Thereafter, the glass fiber-reinforced resin sheet constituting the outermost portion 5 is wound around the surface of the base portion 10.

Then, the upper surface, lower surface, and both sides of the glass fiber reinforced resin sheet of the outermost 5 are pressed against the metal plates (outer molds) 7A, 7B, 7C, and 7D, respectively. Furthermore, the mold release agent 7A, 7B, 7C, 7D is also coated or sprayed in advance. After that, the entire structure (in the state shown in FIG. 4) is installed in the vacuum bag as a whole. The fiber-reinforced resin sheet is hardened by heating using a vacuum heating device, a vacuum pressure heating device, or the like. After that, after cooling and returning to room temperature, the mandrel 6 and the outer molds 7A, 7B, 7C, and 7D are removed to obtain the tube formed body 1. Finally, the resin burrs at the corners 1e of the tube formed body 1 are removed, and the surfaces are polished. With the above operations, the method for manufacturing the tube formed body 1 is completed.

Next, the operation and effect of the tube formed body 1 according to this embodiment will be described.

The formed tube body 1 of this embodiment is provided with a glass fiber laminated on the surface side of the base portion 10 The outermost part 5 is made of a reinforced resin sheet. The surface of the tube formed body 1 is formed of a glass fiber-reinforced resin having a relatively high electrical resistance, and thereby the surface resistance of the tube formed body 1 can be increased. Therefore, it is possible to prevent the occurrence of sparks even when a charged item is supported. According to the above, it is possible to improve the stability of the support operation of the article.

Furthermore, in the case where the surface resistance is increased by applying a resin to the surface of the pipe formed body, the work for ensuring the thickness of the coating layer takes time. However, in this embodiment, only the laminated glass is used. Since the fiber-reinforced resin sheet is sufficient, workability is improved. In addition, in the case where coating is performed, when the pipe formed body is used in a high-temperature environment (and sometimes used in an environment of about 250 ° C., for example), the coating may be damaged. In contrast, in this embodiment, since the outermost 5 is constituted by a laminated glass fiber reinforced resin sheet, it can be used well even in a high temperature environment.

In addition, in the tube formed body 1 of this embodiment, the surface resistance after heat curing may be 1 × 10 ⁶ Ω or more. By setting the surface resistance to a sufficiently high value as described above, it is possible to improve the reliability of preventing spark generation.

Moreover, in the tube molded body 1 of this embodiment, the resin impregnated with a carbon fiber reinforced resin sheet and a glass fiber reinforced resin sheet may be a thermosetting resin. Thereby, the ease of manufacture can be improved.

In the formed pipe body 1 of this embodiment, the outermost portion 5 can be formed over the entire circumference. Thereby, the surface resistance can be increased on any surface in the circumferential direction of the tube forming body 1, and the reliability of preventing spark generation can be improved.

As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment. For example, the formed tube body of the present invention is not limited to supporting a glass substrate, and may be used as a supporter of various articles as articles.

In the above-mentioned embodiment, the outermost portion 5 is formed over the entire circumference of the tube formed body 1, but it is sufficient if the outermost portion 5 is formed at least on the surface (upper surface 1a) that the article contacts. Further, the outermost part 5 is formed in the entire domain of each face (the entire domain extending from the base end 1f to the top end 1g), but It may be formed only in a part of the area that the article can touch.

In addition, the configuration of the base portion 10, the arrangement of the laminated board, and the number of sheets are not limited to those shown in FIG. 3, and may be changed to all aspects. The shape of the tube formed body 1 is not limited to a rectangular ring shape as shown in FIG. 3, and may have a curved portion or the like, as long as it has a shape capable of supporting an article, there is no particular limitation.

[Example]

First, prepregs A to F shown in Table 1 were prepared as prepregs (fiber-reinforced resin sheets) used in Examples and Comparative Examples. The prepregs A to D are carbon fiber reinforced resin sheets, and the prepregs E and F are glass fiber reinforced resin sheets. In addition, as the mandrel, an aluminum material having a thickness of 16 mm, a width of 56 mm, and a length of 2000 mm was prepared.

(Example 1)

The formed tube of Example 1 was obtained by the following production method. The outer dimensions of the tube formed body of Example 1 were 20.1 mm in height x 60.2 mm in width x 2000 mm in length, and the inner dimensions were 16 mm in height x 56 mm in width. Table 2 shows the layer structure of the tube formed body of Example 1. (1) Spray release agent (manufactured by Daikin, DAIFREE GA-6310, etc.) on the core rod. (2) The prepreg A (corresponding to the first layer 2 in FIG. 3) is wound around the core rod once. (3) On both sides of the mandrel A prepreg volume layer (equivalent to the second layers 3A and 3B in FIG. 3) obtained by laminating 6 layers of prepreg C is attached to the side portion. The CF direction is 0 °. The CF direction refers to the angle of the fiber direction with respect to the Y-axis direction (the longitudinal direction of the tube-formed body) in FIG. 1. The "CF direction is 0 °" means that the fiber direction is the Y-axis direction. The prepreg volume layer system is cut and laminated in advance to a width of 16 mm x a length of 2000 mm. (4) Attach a prepreg volume layer (equivalent to the third layers 4A and 4B in FIG. 3) on the upper and lower surfaces of the core rod. This prepreg volume layer system has two layers of prepreg C (0 ° in CF direction), one layer of prepreg D (90 ° in CF direction), and four layers of prepreg B (CF direction) in this order from the inner peripheral side. 0 °). The prepreg volume layer system is cut and laminated in advance to a width of 59.6 mm × length of 2000 mm. (5) As the outermost layer on the outer peripheral side of the prepreg, a prepreg E (the outermost part 5 in FIG. 3) is wound once. (6) Press the four surfaces (upper and lower surfaces and both sides) of the outer peripheral side of the prepreg against the metal plate (outer mold). A mold release agent is sprayed on the outer mold. (7) After the above steps are completed, the structure (mandrel / pre-impregnated volume body / outer mold) is set in the vacuum bag as a whole. (8) The structure is heated at 130 ° C. for 1 hr using a vacuum heating device, a vacuum pressure heating device, or the like to harden the resin. (9) After cooling and returning to room temperature, the outer mold is removed and the mandrel is pulled out, thereby obtaining a hollow pipe shaped body (square pipe robot). (10) Finally, the resin burrs of the tube formed body are removed, and the upper and lower surfaces and both sides are ground.

(Example 2)

As the tube formed body of Example 2, the following tube formed body was obtained: In the same manufacturing method, only the outermost glass fiber prepreg is changed, and two layers of prepreg E are used. The outer dimensions of the tube formed body of Example 2 were 20.2 mm in height x 60.1 mm in width x 2000 mm in length, and the inner dimensions were 16 mm in height x 56 mm in width. Table 3 shows the layer structure of the tube formed body of Example 2.

(Example 3)

As the tube formed body of Example 3, a tube formed body was obtained in the same manufacturing method as in Example 1, except that only the outermost glass fiber prepreg was changed, and two layers of prepreg F were used. The outer dimensions of the tube formed body of Example 3 were 20.0 mm in height x 60.0 mm in width x 2000 mm in length, and the inner dimensions were 16 mm in height x 56 mm in width. Table 4 shows the layer structure of the tube formed body of Example 3.

(Comparative example 1)

As a tube shaped body of Comparative Example 1, a tube shaped body was obtained in the same manufacturing method as in Example 1 and using a single-layer prepreg A of carbon fiber as the outermost prepreg. The external dimensions of the tube molded body of Comparative Example 1 were 20.0 mm in height × 60.0 mm in width × 2000 mm in length, and the internal dimensions were 16 mm in height × 56 mm in width. Table 5 shows the layer structure of the pipe formed body of Comparative Example 1.

(Comparative example 2)

As the tube formed body of Comparative Example 2, a tube formed body having the same manufacturing method, size, and laminated structure as that of Comparative Example 1 was obtained, and the surface of the tube formed body was coated at the end of the steps of Comparative Example 1. cloth. In Comparative Example 2, the entire surface of the upper and lower surfaces, both side surfaces, and all corner portions of the pipe formed body was coated with epoxy resin. That is, the epoxy resin is diluted with an epoxy resin: toluene weight ratio of 1: 1 and is allowed to penetrate into the cloth, and the robot is wiped with the cloth, thereby coating the entire surface of the tube formed body with the epoxy resin, and Heating was performed at 80 ° C for 30 minutes. The film thickness of the resin coating is 3 ~ 5μm.

(Evaluation)

The surface resistances of the tube formed bodies of Examples 1, 2, 3, Comparative Examples 1 and 2 were measured. As a measuring device, "Loresta GP MCP-T610 (high-resistivity resistivity meter measurement range 10 ^-3 Ω to 10 ⁷ Ω)" manufactured by Mitsubishi Chemical ANALYTECH Corporation was used. As the measurement site, a position (set to position 1) of 250 mm from the base end 1f and a position 750 mm (set to position 2) from the base end 1f in the length direction (the Y-axis direction in FIG. 1) of the tube formed body were measured ), The surface resistance at a position of 1250mm from the base end (set to position 3) and a position of 1750mm from the base end (set to position 4). In addition, the surface resistance of each of the positions 1 to 4 of the upper surface 1a, the lower surface 1b, the side surface 1c, the side surface 1d, and the corner portion 1e (see FIG. 3) of the formed pipe body was measured. The measurement results are shown in Tables 6 to 10.

As shown in Tables 6 to 8 below, a surface resistance of 1 × 10 ⁷ Ω (the upper limit of the measurement range) was obtained at any measurement position of any of the tube formed bodies of Examples 1, 2, and 3. That is, the surface resistance of the formed pipe body of Examples 1, 2, and 3 is 1 × 10 ⁶ Ω or more at any part, and it can be understood that it is possible to obtain a surface resistance that prevents sparks and the like as much as possible. On the other hand, in the formed tubes of Comparative Examples 1 and 2, the surface resistance may be lower than 1 × 10 ⁶ Ω depending on the measurement site. From the above, it can be understood that by providing the tube formed body with the outermost portion constituted by a laminated glass fiber reinforced resin sheet, it is possible to obtain a surface resistance capable of preventing the occurrence of sparks and the like.

Claims (7)

A tube formed body that supports a glass substrate and includes: a base portion that is composed of a laminated board in which a plurality of carbon fiber reinforced resin sheets are laminated; and an outermost portion that is laminated on the surface side of the base portion It consists of a glass fiber reinforced resin sheet. A tube formed body that supports a glass substrate and includes: a base portion that is composed of a laminated board in which a plurality of carbon fiber reinforced resin sheets are laminated; and an outermost portion that is laminated on the surface side of the base portion The glass fiber reinforced resin sheet is formed at least in a region where the glass substrate may contact. For example, the pipe formed body of claim 1 has a surface resistance of 1 × 10 ⁶ Ω or more after heat curing. For example, the pipe-formed body of claim 2 has a surface resistance of 1 × 10 ⁶ Ω or more after heat curing. The tube formed article according to any one of claims 1 to 4, wherein the resin-based thermosetting resin is impregnated with the carbon fiber-reinforced resin sheet and the glass fiber-reinforced resin sheet. The tube-formed body according to any one of claims 1 to 4, wherein the outermost portion is formed over the entire circumference. The tube-formed body according to claim 5, wherein the outermost portion is formed over the entire circumference.