JP6144084B2 - Support member - Google Patents

Description

The present invention relates to a hollow pipe-shaped support member that is fixed in a cantilever state at one end.

  As a conventional technique in the above technical field, Patent Document 1 describes a support member such as a support bar provided in a cantilever state in a liquid crystal display (LCD) substrate cassette, for example. The support member described in Patent Literature 1 includes a base pipe made of a reinforced fiber composite resin material having a circular cross section and containing reinforcing fibers other than carbon fibers, and a reinforcing layer formed on the base pipe by the carbon fiber reinforced composite resin material And. In particular, in this support member, the reinforcing layer is formed on the outer surface of the base pipe corresponding to the vertical vertical direction when the support member is used.

  Patent Document 2 discloses an inner cylinder forming step in which a plurality of layers of fiber reinforced resin prepregs are wound around a long core material having a square cross section to form an inner cylinder, and a side surface of the inner cylinder. A lamination step in which a reinforcing layer made of a fiber-reinforced resin prepreg is laminated along the axial direction of the inner cylindrical body to form a preform, and wrapping in which a wrapping tape is wound around the outer layer of the preform Fiber reinforcement for substrate storage cassette for manufacturing a lightweight and high-rigidity fiber-reinforced resin support bar in a fast cycle at a low cost with a process and a heat-curing process for heating the lapped preform. A method for manufacturing a resin support bar is described.

JP 2007-196615 A JP 2013-010346 A

  As described above, the support member described in Patent Document 1 is provided with the reinforcing layer made of the carbon fiber reinforced composite resin material only on the portion corresponding to the vertical vertical direction of the base pipe when the support member is used. As a result, according to the support member described in Patent Document 1, excellent load deflection characteristics are achieved while reducing material costs by reducing the amount of carbon fiber used. As described above, in the support members in the above technical field, it is desired to reduce the material cost while maintaining the bending rigidity.

  On the other hand, in order to increase the bending rigidity of the support member, it is preferable to use a carbon fiber having a high elastic modulus as the carbon fiber used for the reinforcing layer, but the carbon fiber having a high elastic modulus is compared with the carbon fiber having a low elastic modulus. And expensive.

  This invention is made | formed in view of such a situation, and provides the supporting member which can reduce the usage-amount of a high elastic modulus carbon fiber and can reduce material cost, maintaining bending rigidity. This is the issue.

  As a result of intensive studies to solve the above problems, the present inventors have obtained the following knowledge. That is, in the reinforcing part formed on the base pipe part, a carbon fiber reinforced composite resin material of carbon fiber having a relatively high tensile elastic modulus is used with respect to the region on the fixed end side that is fixed during use. If a carbon fiber reinforced composite resin material of carbon fiber with a relatively small tensile modulus relative to the region of the free end that is not fixed at times is used, the tensile modulus of elasticity is relatively large while maintaining the overall bending rigidity. It is possible to reduce material costs by reducing the amount of expensive carbon fiber carbon fiber reinforced composite resin material used. The present invention has been made based on such knowledge.

  That is, the support member according to the present invention is a hollow pipe-shaped support member that is used in a cantilever state in which one end is fixed and the other end is not fixed, and extends from one end to the other end. Reinforcing portion that extends from one end to the other end, and is formed on each of the extending base pipe portion, the upper portion that is the upper side in the vertical direction when used in the base pipe portion, and the lower portion that faces the upper portion. And the base pipe part is made of a fiber reinforced composite resin material, and the reinforcing part includes a first reinforcing area and a second reinforcing area arranged in a direction from one end to the other end. The first and second reinforcing regions are made of a carbon fiber reinforced composite resin material, and the orientation direction of the carbon fibers of the carbon fiber reinforced composite resin material constituting the first and second reinforcing regions is one end. From the other end The tensile elastic modulus of the carbon fibers of the carbon fiber reinforced composite resin material constituting the first reinforcing region is substantially the same as the direction in which the carbon fiber reinforced composite resin material constituting the second reinforcing region is formed. It is characterized by being larger than the tensile modulus.

  In this support member, a reinforcing portion made of a carbon fiber reinforced composite resin material is formed on the upper portion of the base pipe portion which is the upper side in the vertical direction and the lower portion facing the upper portion when used. Yes. In particular, the reinforcing portion is formed of a carbon fiber reinforced composite resin material of carbon fiber having a relatively large tensile elastic modulus in the first reinforcing region on the one end side that becomes a fixed end during use, and becomes a free end during use. The second reinforcing region on the other end side is composed of a carbon fiber reinforced composite resin material of carbon fibers having a relatively small tensile elastic modulus. Therefore, according to this support member, it is possible to reduce the material cost while maintaining the bending rigidity.

  In the support member according to the present invention, the tensile elastic modulus of the carbon fiber of the carbon fiber reinforced composite resin material constituting the first reinforcing region is 400 GPa or more and 900 GPa or less, and the carbon fiber reinforced constituting the second reinforcing region. The tensile elastic modulus of the carbon fiber of the composite resin material can be 200 GPa or more and less than 400 GPa. Further, in the support member according to the present invention, in the direction from the one end portion to the other end portion, the length of the first reinforcement region is 30% or more and 70% or less of the entire length of the support member. In the direction toward the other end, the length of the second reinforcing region is 30% of the total length of the support member in a range where the total length of the first region is 100% or less of the total length of the support member. It may be 70% or less. In these cases, it is possible to reduce the material cost while preferably maintaining the bending rigidity.

  In the support member according to the present invention, the carbon fibers of the carbon fiber reinforced composite resin material constituting the first reinforcing region are pitch-derived carbon fibers, and the carbon fiber reinforced composite resin material constituting the second reinforcing region. The carbon fiber may be a carbon fiber derived from polyacrylonitrile (PAN). In this case, since the carbon fiber reinforced composite resin material of the carbon fiber derived from the pitch having a large tensile elastic modulus is used for the first region on the one end side which is the fixed end, the bending rigidity should be sufficiently maintained. Can do. Moreover, since the carbon fiber reinforced composite material of carbon fiber derived from PAN that is relatively inexpensive is used for the second region on the other end side which is the free end, carbon fiber of carbon fiber derived from relatively expensive pitch is used. The amount of the reinforced composite resin material can be reduced to sufficiently reduce the material cost.

  The support member according to the present invention can have a tapered shape in which the outer circumference of one end is longer than the outer circumference of the other end. In this case, vibration damping characteristics can be improved.

  In the support member according to the present invention, the base pipe portion may be made of a glass fiber reinforced composite resin material. As described above, if a relatively inexpensive glass fiber reinforced composite material is used for the base pipe portion, the material cost can be further reduced.

  ADVANTAGE OF THE INVENTION According to this invention, the supporting member which can reduce the usage-amount of a high elastic modulus carbon fiber and can reduce material cost can be provided, maintaining bending rigidity.

It is sectional drawing which shows the structure of 1st Embodiment of the supporting member which concerns on this invention. FIG. 6 is another cross-sectional view of the support member shown in FIG. 1. It is sectional drawing which shows the modification of the supporting member shown by FIG. It is sectional drawing which shows the structure of 2nd Embodiment of the supporting member which concerns on this invention. FIG. 5 is another cross-sectional view of the support member shown in FIG. 4. It is sectional drawing which shows the modification of the supporting member shown by FIG. It is a perspective view of the component for supporting member attachment. It is a table | surface which shows the measurement result of the characteristic of the Example of a supporting member which concerns on this invention, and a comparative example. It is a table | surface which shows the measurement result of the characteristic of the Example of a supporting member which concerns on this invention, and a comparative example.

Hereinafter, an embodiment of a support member according to the present invention will be described in detail with reference to the drawings. In the description of the drawings, the same elements or corresponding elements are denoted by the same reference numerals, and redundant description is omitted. Moreover, in each figure, the dimension ratio of each part may differ from an actual thing.
[First Embodiment]

  FIG. 1 is a cross-sectional view showing a configuration of a first embodiment of a support member according to the present invention. FIG. 2 is another cross-sectional view of the support member shown in FIG. 2A is a cross-sectional view taken along the line IIA-IIA in FIG. 1, and FIG. 2B is a cross-sectional view taken along the line IIB-IIB in FIG. In the following description, the upper side and the lower side in the drawing of each drawing are the upper side and the lower side in the vertical direction when the support member is used, respectively. The support member 1 shown in FIGS. 1 and 2 can be used, for example, as an arm part of a robot hand or a support bar of a substrate cassette.

  As shown in FIGS. 1 and 2, the support member 1 has a long hollow pipe shape. The support member 1 is used in a cantilever state in which one end 1a in the longitudinal direction is fixed. That is, the one end 1a of the support member 1 becomes a fixed end when in use. On the other hand, in the support member 1, the other end 1b in the longitudinal direction is not fixed. That is, the other end 1b of the support member 1 is a free end when in use. The support member 1 has a tapered shape in which the outer circumference of the one end 1a is longer than the outer circumference of the other end 1b. That is, as for the support member 1, the external area in the cross section orthogonal to a longitudinal direction is reducing gradually from the one end part 1a toward the other end part 1b. In the support member 1, for example, a support object (for example, a glass substrate or the like) is placed on the upper surface 1 s located on the upper side in the vertical direction during use. When the support member 1 is attached to the robot or the LCD substrate storage cassette, an attachment part made of metal or the like is firmly joined to the fixed end side of the support member 1, and the robot or the like is connected via the support member attachment part. It can be set as the structure attached to. In order to easily bond or bond the mounting parts, it is preferable to provide a straight portion, that is, a portion whose cross-sectional shape and dimensions do not change, on the fixed end side of the support member 1.

  The support member 1 is provided on the base pipe portion 10, the hollow pipe-shaped base pipe portion 10, the reinforcing portion 20 provided on the base pipe portion 10, the reinforcing portion 30 provided on the reinforcing portion 20, and the base pipe portion 10. The shaping unit 40 is provided. The base pipe portion 10 extends from the one end 1a of the support member 1 to the other end 1b. The base pipe portion 10 has a tapered shape that gradually decreases from the one end 1a of the support member 1 toward the other end 1b.

  The shape of the cross section perpendicular to the longitudinal direction of the support member 1 in the base pipe portion 10 (the cross sectional shape shown in FIG. 2) extends in the left-right direction intersecting the vertical vertical direction and has four corners chamfered or round fillet shape. It has a rectangular ring shape. The base pipe portion 10 is located on the upper surface 1 s side of the support member 1 (that is, on the upper side in the vertical direction when in use), a lower portion 12 that faces the upper portion 11, an upper portion 11, and a lower portion It is comprised from a pair of side part 13 which connects the side part 12 mutually.

  Such a base pipe part 10 can be comprised from a glass fiber reinforced composite resin material, for example. In that case, the base pipe portion 10 can be configured by laminating a plurality of glass cloth prepreg sheets in which glass fibers are impregnated with a thermosetting resin. However, the material constituting the base pipe portion 10 is not limited to the glass fiber reinforced composite resin material, and may be, for example, a carbon fiber reinforced composite resin material using PAN-derived carbon fibers or pitch-derived carbon fibers. The base pipe part 10 is comprised from the fiber reinforced composite resin material containing the arbitrary fibers whose tensile elasticity modulus is smaller than the carbon fiber of the carbon fiber reinforced composite resin material which comprises the 1st reinforcement area | region 21 of the reinforcement part 20 mentioned later. be able to.

  The reinforcing portion 20 extends from the one end 1a of the support member 1 to the other end 1b. The reinforcing portion 20 is formed on each of the upper portion 11 and the lower portion 12 of the base pipe portion 10. The reinforcing portion 20 is not formed on the side portion 13 of the base pipe portion 10. The cross-sectional shape along the direction intersecting the longitudinal direction of the support member 1 in the reinforcing portion 20 is a convex shape that increases in thickness from the edge of the upper portion 11 and the lower portion 12 of the base pipe portion 10 toward the center portion. Presents.

  The reinforcing portion 20 includes a first reinforcing region 21 and a second reinforcing region 22 arranged in a direction from the one end 1 a of the support member 1 toward the other end 1 b. The first reinforcement region 21 extends from one end 1 a of the support member 1, and the second reinforcement region 22 extends from the terminal portion of the first reinforcement region 21 to the other end 1 b of the support member 1. Exist. In the longitudinal direction of the support member 1, the length L <b> 21 of the first reinforcement region 21 is about 30% to 70% of the total length L <b> 1 of the support member 1. Further, in the longitudinal direction of the support member 1, the length L22 of the second reinforcement region 22 is within a range in which the sum of the length L21 of the first reinforcement region 21 and the total length L1 of the support member 1 is 100%. It is about 30% to 70% of the entire length L1 of the support member 1.

  That is, in this embodiment, when the length L21 of the first reinforcement region 21 is about 60% of the total length L1 of the support member 1 in the longitudinal direction of the support member 1, the second reinforcement region 22 The length L22 is about 40% of the entire length L1 of the support member 1. The reinforcing portion 20 may include other regions different from the first reinforcing region 21 and the second reinforcing region 22. In that case, in the longitudinal direction of the support member 1, the length L 21 of the first reinforcement region 21 is set to about 30% or more and 70% or less of the total length L 1 of the support member 1 and the second reinforcement region 22. The length L22 is set to be not less than 30% and not more than 70% of the total length L1 of the support member 1 in a range in which the total of the length L21 of the first reinforcement region 21 is less than 100% of the total length L1 of the support member 1. That's fine.

  The 1st reinforcement area | region 21 and the 2nd reinforcement area | region 22 are comprised from the carbon fiber reinforced composite resin material. The orientation direction of the carbon fibers of the carbon fiber reinforced composite resin material constituting the first reinforcement region 21 and the second reinforcement region 22 substantially coincides with the longitudinal direction of the support member 1. The tensile elastic modulus of the carbon fiber of the carbon fiber reinforced composite resin material constituting the first reinforcing region 21 is larger than the tensile elastic modulus of the carbon fiber of the carbon fiber reinforced composite resin material constituting the second reinforcing region 22.

  More specifically, the tensile elastic modulus of the carbon fiber of the carbon fiber reinforced composite resin material constituting the first reinforcing region 21 is, for example, about 400 GPa or more and 900 GPa or less. Moreover, the tensile elastic modulus of the carbon fiber of the carbon fiber reinforced composite resin material constituting the second reinforcing region 22 is, for example, about 200 GPa or more and less than 400 GPa. More specifically, the first reinforcing region 21 can be composed of a carbon fiber reinforced composite resin material using pitch-derived carbon fibers, and the second reinforcing region 22 uses PAN-derived carbon fibers. The carbon fiber reinforced composite resin material can be used.

  For example, the reinforcing portion 20 is made of a carbon fiber prepreg sheet in which a carbon fiber is impregnated with a thermosetting resin for each of the first reinforcing region 21 and the second reinforcing region 22. A plurality of layers can be stacked on each of the upper part 11 and the lower part 12 of the first layer.

  The reinforcing portion 30 is formed on the reinforcing portion 20 so as to cover the entire reinforcing portion 20 on each of the upper portion 11 and the lower portion 12 of the base pipe portion 10. Accordingly, the reinforcing portion 30 extends from the one end 1a of the support member 1 to the other end 1b. The reinforcing part 30 is not formed on the side part 13 of the base pipe part 10. The reinforcement part 30 is comprised from the carbon fiber reinforced composite resin material.

  The tensile strength of the carbon fiber of the carbon fiber reinforced composite resin material constituting the reinforcing portion 30 can be made larger than the tensile strength of the carbon fiber of the carbon fiber reinforced composite resin material constituting the first reinforcing region 21. More specifically, the reinforcement part 30 can be comprised from the carbon fiber reinforced composite resin material using the carbon fiber derived from PAN, for example. The reinforcement part 30 can be comprised by laminating | stacking one layer of carbon fiber prepreg sheets on the reinforcement part 20, for example.

  The shaping portion 40 is formed on each of the side portions 13 of the base pipe portion 10. The shaping portion 40 extends from the one end 1a of the support member 1 to the other end 1b. The shaping part 40 can be comprised from a glass fiber reinforced composite resin material, for example. In that case, the shaping part 40 can be configured by laminating a plurality of glass cloth prepreg sheets on the base pipe part 10. The shape of the cross section orthogonal to the longitudinal direction of the support member 1 in the shaping portion 40 has a convex shape that increases in thickness from the edge of the side portion 13 of the base pipe portion 10 toward the center.

  The outer shape of the cross section orthogonal to the longitudinal direction of the support member 1 is defined by the reinforcing portion 20 (and the reinforcing portion 30) and the shaping portion 40. Accordingly, the outer shape of the support member 1 has a substantially elliptical shape due to the convex shape formed on each part of the base pipe portion 10. On the other hand, since the inner shape of the cross section along the direction intersecting the longitudinal direction of the support member 1 is defined by each portion of the base pipe portion 10, it has a rectangular shape. In the support member 1 according to this embodiment, the shape of the cross section of the base pipe portion 10 orthogonal to the longitudinal direction of the support member 1 may be a square ring. In this case, the outer shape of the cross section orthogonal to the longitudinal direction of the support member 1 is substantially circular.

  As described above, in the support member 1 according to the present embodiment, the upper portion 11 of the base pipe portion 10 that is the upper side in the vertical direction and the lower portion 12 that faces the upper portion 11 when used. A reinforcing portion 20 made of a carbon fiber reinforced composite resin material is formed. In particular, the reinforcing portion 20 is formed of a carbon fiber reinforced composite resin material of carbon fiber having a relatively large tensile elastic modulus, and the first reinforcing region 21 on the one end portion 1a side, which becomes a fixed end during use, is free during use. The second reinforcing region 22 on the other end 1b side that is an end is made of a carbon fiber reinforced composite resin material of carbon fibers having a relatively low tensile elastic modulus. Therefore, according to this support member 1, it becomes possible to reduce material cost, maintaining bending rigidity.

  Here, the support member 1 according to the present embodiment can be manufactured as follows, for example. That is, first, a glass cloth prepreg sheet is wound a plurality of times on a mandrel as a core material to form a portion corresponding to the base pipe portion 10. Carbon fiber prepreg sheets for the reinforcing portions 20 and 30 are provided on the portions corresponding to the upper portion 11 and the lower portion 12 of the portion corresponding to the base pipe portion 10, and the portions corresponding to the left and right side portions 13. A laminated body corresponding to the support member 1 is formed by laminating a single layer or a plurality of layers of glass cloth prepreg sheets for the shaping unit 40 on the top. Next, the support member 1 can be manufactured by heating the laminated body to cure the thermosetting resin constituting each prepreg sheet and pulling the cured product out of the mandrel.

  Heating for curing the thermosetting resin may be performed under pressure for the purpose of adjusting the outer shape of the support member 1 to a desired shape and defoaming to prevent void generation in the thermosetting resin. It is common. For heating under pressure, a separable pressing die having the outer shape of the desired support member 1 on the inside is attached while pressing so as to cover the laminate on the mandrel, and this is heated in an oven or the like. A method of heating by means (mold method), a method of winding a synthetic resin tape (shrink tape) that shrinks by heating around the entire laminate on a mandrel, and heating this by means of heating such as an oven (tape tension) Law) etc. is common. Of these, the mold method requires capital investment for molds and incidental equipment, which increases costs, whereas the tape tension method does not require capital investment, which can reduce costs. it can.

  When the tape / shrink method is employed when the outer shape of the cross section along the direction orthogonal to the longitudinal direction of the support member 1 is a shape having a corner portion and a flat portion, for example, a quadrangle, the tape tension is laminated. There is a tendency for the tension to become non-uniform so that it is difficult to be sufficiently added to the flat part by concentrating on the corners of the body. In this case, it is difficult to adjust the outer shape of the support member 1 to a desired shape, and defoaming is insufficient, and voids tend to occur. On the other hand, the outer shape of the reinforcing portions 20 and 30 on the upper and lower surfaces when the support member 1 is used is convex toward the outside, and the shaping portion 40 that is convex toward the outside is provided on the left and right side surfaces. As a result, the cross-sectional outer shape of the support member 1 becomes substantially elliptical or substantially circular, and the tension of the shrink tape can be applied relatively uniformly to each part on the outer periphery of the laminate, and the shaping and defoaming of the outer shape can be easily performed. Can be done.

Moreover, the support member 1 which concerns on this embodiment can also be set as the aspect which does not provide the shaping part 40, as FIG. 3 shows. Furthermore, the support member 1 according to the present embodiment may be in a mode in which the reinforcing portion 30 is not provided.
[Second Embodiment]

  Subsequently, a second embodiment of the support member according to the present invention will be described. FIG. 4 is a cross-sectional view showing the configuration of the second embodiment of the support member according to the present invention. FIG. 5 is another cross-sectional view of the support member shown in FIG. 5A is a cross-sectional view taken along line VA-VA in FIG. 4, and FIG. 5B is a cross-sectional view taken along line VB-VB in FIG.

  As shown in FIGS. 4 and 5, the support member 1 </ b> A according to the present embodiment is the first embodiment in that the base pipe portion 10 </ b> A is provided instead of the base pipe portion 10 and the shaping portion 40 is not provided. This is different from the support member 1 according to the above. Other points of the support member 1A according to the present embodiment are the same as those of the support member 1 according to the first embodiment. The base pipe portion 10A is different from the base pipe portion 10 in that the shape of the cross section orthogonal to the longitudinal direction of the support member 1A (the cross sectional shape shown in FIG. 5) is annular.

  The base pipe portion 10A is located on the upper surface 1s side of the support member 1A (that is, on the upper side in the vertical direction), the lower portion 12A facing the upper portion 11A, the upper portion 11A, and the lower portion. It is comprised from a pair of side part 13A which connects 12A mutually. Such a base pipe portion 10 </ b> A can be configured by the same material and method as the base pipe portion 10, for example.

  In the supporting member 1A, the reinforcing portion 20 is formed on each of the upper portion 11A and the lower portion 12A of the base pipe portion 10A. The reinforcing portion 20 is not formed on the side portion 13A of the base pipe portion 10A. The shape of the cross section orthogonal to the longitudinal direction of the support member 1A in the reinforcing portion 20 is curved so as to follow the cross sectional shapes of the upper portion 11A and the lower portion 12A of the base pipe portion 10A.

  Since the outer shape of the cross section orthogonal to the longitudinal direction of the support member 1A does not include the shaping portion 40, the outer shape is defined by the reinforcing portion 20 (and the reinforcing portion 30) and the side portion 13A of the base pipe portion 10A. . Therefore, the outer shape of the support member 1A has an elliptical shape extending in the vertical vertical direction. On the other hand, since the inner shape of the cross section orthogonal to the longitudinal direction of the support member 1A is defined by each portion of the base pipe portion 10A, it has a circular shape.

  In addition, since the reinforcement part 20 in 1 A of support members of 2nd Embodiment is the structure similar to the support member 1 of the said 1st Embodiment, description is abbreviate | omitted in order to avoid duplication. Also, the manufacturing method of the supporting member 1A can be the same method as the supporting member 1 of the first embodiment except that the shape of the mandrel to be used is different and the shaping part 40 is not provided. I will omit the explanation.

  Also in the support member 1A according to the present embodiment as described above, it is possible to reduce the material cost while maintaining the bending rigidity similarly to the support member 1 according to the first embodiment.

  In the support member 1A according to the present embodiment, for example, as shown in FIG. 6, the cross-sectional shape along the direction intersecting the longitudinal direction of the support member 1A in the base pipe portion 10A intersects the vertical vertical direction. It may be an elliptical ring extending in the left-right direction. Further, the support member 1 </ b> A according to the present embodiment may also be an aspect in which the reinforcing portion 30 is not provided.

  The above embodiment describes one embodiment of the support member according to the present invention. Therefore, the support member according to the present invention is not limited to the support members 1 and 1A described above, and the support members 1 and 1A can be arbitrarily changed without changing the gist of each claim.

Subsequently, examples of the support member according to the present invention will be described. In a present Example, the supporting member which concerns on Examples 1-6 and the supporting member which concerns on Comparative Examples 1-6 were prepared, and it measured about those characteristics. In addition, the supporting member of Examples 1-3 respond | corresponds to the supporting member 1 which concerns on the said 1st Embodiment, The supporting member of Examples 4-6 is 1A of supporting members which concern on the said 2nd Embodiment. Corresponding. Below, Example 1-3 and Comparative Examples 1-3 are demonstrated first, and then Examples 4-6 and Comparative Examples 4-6 are demonstrated.
[Example 1]

  First, a mandrel made of steel as a core material was prepared. The mandrel includes a straight portion on the fixed end side, that is, a range in which the cross-sectional shape and dimensions do not change, and a tapered portion on the free end side, that is, a range in which the outer circumference becomes shorter toward the free end side. The shape of the mandrel is a square bar with a square cross section in the straight range on the fixed end side, and a shape obtained by cutting off the tip of the quadrangular pyramid in the taper range on the free end side (that is, a truncated pyramid shape). The dimensions of the mandrel are a tip side width of 10 mm, a tip side height of 10 mm, a base end side (hand side) width of 22 mm, and a base end side height of 22 mm. The total length is 2400 mm, the range of the fixed end side 250 mm is a straight shape with a width of 22 mm and the base end side height of 22 mm, and the range of 2150 mm on the free end side is a taper shape. In order to make it easy to wind the prepreg sheet, the corner of the mandrel was subjected to 5R fillet processing. Here, the distal end corresponds to the end on the other end 1 b side of the support member 1, and the proximal end corresponds to the end on the one end 1 a side of the support member 1.

  Subsequently, the base end side 250 mm has a straight range of 26 mm in width (outside) and 26 mm in base end side height (outside), the outer periphery becomes smaller toward the free end side, and the width (outside) on the tip end side. In order to form a base pipe portion having a thickness of 2 mm and a total length of 2400 mm, having a thickness of 14 mm and a tip side height (outside) of 14 mm, the glass cloth prepreg sheet A was wound around the mandrel and laminated several times. The orientation direction of the glass fiber was the longitudinal direction (0 °) and the circumferential direction (90 °) of the mandrel. As the glass cloth prepreg sheet A, a glass cloth prepreg sheet (manufactured by Daito Co., Ltd., product number: SCF243EP-BL3, thickness: 0.25 mm) formed by impregnating a glass fiber cloth with an epoxy resin was used.

  Subsequently, as a first reinforcing layer, a highly elastic carbon fiber prepreg sheet B derived from pitch is combined with a rectangle with a width of 26 mm and a length of 250 mm and a symmetrical trapezoid with an upper base of 19 mm, a lower base of 26 mm, and a height of 1300 mm. Two glass laminate prepreg sheets were prepared by preparing two sets of laminates obtained by cutting into a 1550 mm long shape and laminating six sheets, so that the longitudinal direction of the mandrel and the orientation direction of the carbon fibers substantially coincided with each other. The laminate was placed on A. In that case, each laminated body was arrange | positioned to each of the part (for example, the part corresponding to the upper part 11 and the lower part 12 of the base pipe part 10) which corresponds to the upper side and the lower side of the perpendicular direction at the time of use. In particular, the lower side of the highly elastic carbon fiber prepreg sheet B derived from the pitch of each laminate and a portion having a width of 26 mm coincided with the base end of the mandrel. Therefore, the highly elastic carbon fiber prepreg sheet B derived from the pitch of the first reinforcing layer is arranged in a range of 1550 mm on the base end side of the mandrel. In the prepreg sheet B having a length of 1550 mm, which is the first reinforcing layer, the carbon fibers are continuous in the longitudinal direction.

The pitch-derived high-elasticity carbon fiber prepreg sheet B is a pitch-derived high-elasticity carbon fiber prepreg sheet in which pitch-derived high-elasticity carbon fibers having a tensile modulus of 800 GPa and a tensile strength of 3430 MPa are oriented in one direction and impregnated with an epoxy resin ( Nippon Graphite Fiber Co., Ltd., product number: E8026C-28N, CF: Granock XN-80 (derived from pitch), CF basis weight: 285 g / m ² , resin content: 33 wt%, thickness 0.25 mm) were used.

  Subsequently, as a second reinforcing layer, a laminated body formed by laminating six PAN-derived carbon fiber prepreg sheets C into a symmetrical trapezoidal shape having an upper base of 14 mm, a lower base of 19 mm, and a height of 850 mm is laminated. A set was prepared, and the laminate was disposed on the glass cloth prepreg sheet A wound around the mandrel so that the longitudinal direction of the mandrel and the orientation direction of the carbon fibers substantially coincided. In that case, each laminated body was arrange | positioned to each of the part (for example, the part corresponding to the upper part 11 and the lower part 12 of the base pipe part 10) which corresponds to the upper side and the lower side of the perpendicular direction at the time of use. In particular, the upper base of the PAN-derived carbon fiber prepreg sheet C of each laminate was made to coincide with the tip of the mandrel. Therefore, the PAN-derived carbon fiber prepreg sheet C of the second reinforcing layer is disposed in a range of 850 mm on the tip side of the mandrel.

As the PAN-derived carbon fiber prepreg sheet C, a PAN-derived carbon fiber prepreg sheet in which PAN-derived carbon fibers having a tensile modulus of 230 GPa and a tensile strength of 4900 MPa are oriented in one direction and impregnated with an epoxy resin (manufactured by Toray Industries, Inc., product number) : P3052S-25, CF: Trading card T700S (derived from PAN), CF basis weight: 250 g / m ² , resin content: 33% by weight, thickness 0.24 mm).

  Subsequently, as a third reinforcing layer, a highly elastic carbon fiber prepreg sheet B derived from pitch is combined with a rectangle having a width of 17 mm and a length of 250 mm and a symmetrical trapezoid having an upper base of 12 mm, a lower base of 17 mm, and a height of 1400 mm. Two sets of laminates made by cutting out a 1650 mm long shape and laminating 5 sheets are prepared, and the first reinforcing layer is used so that the longitudinal direction of the mandrel and the orientation direction of the carbon fibers are substantially coincident with each other. The laminated body was arrange | positioned on the highly elastic carbon fiber prepreg sheet B derived from a pitch. In that case, each laminated body was arrange | positioned to each of the part (for example, the part corresponding to the upper part 11 and the lower part 12 of the base pipe part 10) which corresponds to the upper side and the lower side of the perpendicular direction at the time of use. In particular, the lower side of the highly elastic carbon fiber prepreg sheet B derived from the pitch of each laminate and a portion having a width of 17 mm were made to coincide with the base end of the mandrel. Therefore, the highly elastic carbon fiber prepreg sheet B derived from the pitch of the third reinforcing layer is arranged in a range of 1650 mm on the base end side of the mandrel. In the prepreg sheet B having a length of 1650 mm, which is the third reinforcing layer, the carbon fibers are continuous in the longitudinal direction.

  Subsequently, as a fourth reinforcing layer, a laminate obtained by cutting out a PAN-derived carbon fiber prepreg sheet C into a symmetrical trapezoidal shape having an upper base of 9 mm, a lower base of 12 mm, and a height of 750 mm and laminating two sheets is provided. A set was prepared and disposed on the PAN-derived carbon fiber prepreg sheet C as the second reinforcing layer so that the longitudinal direction of the mandrel and the orientation direction of the carbon fibers substantially coincided with each other. In that case, each laminated body was arrange | positioned to each of the part (for example, the part corresponding to the upper part 11 and the lower part 12 of the base pipe part 10) which corresponds to the upper side and the lower side of the perpendicular direction at the time of use. In particular, the PAN-derived carbon fiber prepreg sheet C of each laminate was placed so that the upper base of the laminate coincided with the tip of the mandrel. Therefore, the PAN-derived carbon fiber prepreg sheet C of the fourth reinforcing layer is arranged in a range of 750 mm on the tip side of the mandrel.

  Subsequently, as a fifth reinforcing layer, a carbon fiber prepreg sheet C derived from PAN was combined with a rectangle with a width of 26 mm and a length of 250 mm, and a symmetrical trapezoid with an upper base of 14 mm, a lower base of 26 mm, and a height of 2150 mm. Cut out into a shape of 2400 mm in length, prepare two pairs one by one, and the highly elastic carbon fiber prepreg derived from the pitch of the third reinforcing layer so that the longitudinal direction of the mandrel and the orientation direction of the carbon fiber substantially coincide One sheet was placed on the PAN-derived carbon fiber prepreg sheet C of the sheet B and the fourth reinforcing layer. At that time, the prepreg sheet C as the fifth reinforcing layer is applied to each of the portions corresponding to the upper side and the lower side in the vertical direction during use (for example, the portions corresponding to the upper portion 11 and the lower portion 12 of the base pipe portion 10). One by one. The PAN-derived carbon fiber prepreg sheet C of the fifth reinforcing layer is arranged over the entire length of the mandrel. In the prepreg sheet C having a length of 2400 mm, which is the fifth reinforcing layer, the carbon fibers are continuous in the longitudinal direction.

  Here, the laminated body of highly elastic carbon fiber prepreg sheets B derived from the pitch as the first and third reinforcing layers corresponds to the first reinforcing region 21 of the reinforcing portion 20 of the supporting member 1, and the second and second The PAN-derived carbon fiber prepreg sheet C as a reinforcing layer 4 corresponds to the second reinforcing region 22 of the reinforcing portion 20 of the supporting member 1 and the PAN-derived carbon fiber prepreg as the fifth reinforcing layer. The sheet C corresponds to the reinforcing portion 30 of the support member 1.

  With the laminated structure of the reinforcing layers described above, in the support member of Example 1, the pitch-derived highly elastic carbon fiber prepreg sheet B is disposed in the range of the mandrel proximal end side 2/3, and the mandrel distal end side 1/3 The PAN-derived carbon fiber prepreg sheet C is disposed in the range of the above, and the outside thereof is covered with the PAN-derived carbon fiber prepreg sheet C over the entire length of the mandrel.

  Subsequently, the glass cloth prepreg sheet A was cut into a shape of 2400 mm in length, which was a combination of a rectangle with a width of 26 mm and a length of 250 mm and a symmetrical trapezoid with an upper base of 14 mm, a lower base of 26 mm, and a height of 2150 mm. A glass cloth prepreg sheet A is combined with a rectangular shape with a width of 17 mm and a length of 250 mm and a symmetrical trapezoid with an upper base of 9 mm, a lower base of 17 mm, and a height of 2150 mm. Six sheets cut into a shape of 2400 mm were stacked to prepare (two sets) of stacked bodies. Thereafter, the laminate was placed on the glass cloth prepreg sheet A for the base pipe portion 10. In that case, each laminated body was arrange | positioned in each of the part (For example, the part corresponding to the side part 13 of the base pipe part 10) which corresponds to the left-right direction with respect to a perpendicular direction at the time of use. Here, the laminate composed of the 12 glass cloth prepreg sheets A corresponds to the shaping portion 40 of the support member 1.

After the above prepreg lamination process, a tape that shrinks by heating, such as polypropylene tape or PET tape, is wound from the outside to fix each prepreg sheet, and the base pipe part, the reinforcing layer and the shaping part are simultaneously heated in an oven. Each prepreg sheet was cured. At this time, the temperature was raised at 2 ° C./min and held at 140 ° C. for 120 minutes, and then returned to room temperature by natural cooling. Finally, the support member of Example 1 corresponding to the support member 1 having a hollow pipe shape was obtained by extracting the mandrel.
[Example 2]

  The support member of Example 2 differs from the support member of Example 1 in that the dimensions of the carbon fiber prepreg sheet of the laminate as the first to fourth reinforcing layers are different. The other points of the support member of Example 2 are the same as those of the support member of Example 1. In Example 2, for the laminated body of the first reinforcing layer, the pitch-derived high-elasticity carbon fiber prepreg sheet B is made of a rectangle with a width of 26 mm and a length of 250 mm, an upper base of 21 mm, a lower base of 26 mm, and a height. It was cut into a shape with a length of 1150 mm, in which 900 mm symmetrical left and right trapezoids were combined. Further, for the laminate of the second reinforcing layer, the PAN-derived carbon fiber prepreg sheet C was cut into a symmetrical trapezoidal shape having an upper base of 14 mm, a lower base of 21 mm, and a height of 1250 mm.

  Further, for the laminated body of the third reinforcing layer, the pitch-derived highly elastic carbon fiber prepreg sheet B is symmetrical with a rectangle having a width of 17 mm and a length of 250 mm, and an upper base of 14 mm, a lower base of 17 mm, and a height of 1000 mm. Cut into a 1250 mm long shape with a combination of various trapezoids. Furthermore, for the laminate of the fourth reinforcing layer, the PAN-derived carbon fiber prepreg sheet C was cut into a symmetrical trapezoidal shape having an upper base of 9 mm, a lower base of 14 mm, and a height of 1150 mm.

Due to the laminated structure of the reinforcing layers described above, in the support member of Example 2, the high-elasticity carbon fiber prepreg sheet B derived from the pitch is disposed in the range of the base end side 1/2 of the mandrel, and the mandrel front end side 1/2 The PAN-derived carbon fiber prepreg sheet C is arranged in the range of, and the outside thereof is covered with the PAN-derived carbon fiber prepreg sheet C over the entire length of the mandrel.
[Example 3]

  The support member of Example 3 differs from the support member of Example 1 in that the dimensions of the carbon fiber prepreg sheet of the laminate as the first to fourth reinforcing layers are different. Other points of the support member of Example 3 are the same as those of the support member of Example 1. In Example 3, for the laminated body of the first reinforcing layer, the pitch-derived high-elasticity carbon fiber prepreg sheet B is made of a rectangle with a width of 26 mm and a length of 250 mm, an upper base of 23 mm, a lower base of 26 mm, and a height. A 500 mm long symmetrical trapezoid was combined and cut into a shape with a length of 750 mm. In addition, for the second reinforcing layer laminate, the PAN-derived carbon fiber prepreg sheet C was cut into a symmetrical trapezoidal shape having an upper base of 14 mm, a lower base of 23 mm, and a height of 1650 mm.

  Further, for the laminated body of the third reinforcing layer, the pitch-derived highly elastic carbon fiber prepreg sheet B is symmetrical with a rectangle having a width of 17 mm and a length of 250 mm, and an upper base of 15 mm, a lower base of 17 mm, and a height of 600 mm. Cut into a shape of 850 mm in length with a combination of various trapezoids. Furthermore, for the laminate of the fourth reinforcing layer, the PAN-derived carbon fiber prepreg sheet C was cut into a symmetrical trapezoidal shape having an upper base of 9 mm, a lower base of 15 mm, and a height of 1550 mm.

Due to the laminated structure of the reinforcing layers described above, in the support member of Example 3, the pitch-derived highly elastic carbon fiber prepreg sheet B is disposed in the range of the base end side 1/3 of the mandrel, and the mandrel tip side 2/3 The PAN-derived carbon fiber prepreg sheet C is arranged in the range of, and the outside thereof is covered with the PAN-derived carbon fiber prepreg sheet C over the entire length of the mandrel.
[Comparative Example 1]

  The support member of Comparative Example 1 is different from the support member of Example 1 in that the structure of the reinforcing layer is different. Other points of the support member of Comparative Example 1 are the same as those of the support member of Example 1. That is, in Comparative Example 1, as the first and second reinforcing layers, a highly elastic carbon fiber prepreg sheet B derived from pitch is formed into a rectangle having a width of 26 mm and a length of 250 mm, an upper base of 14 mm, a lower base of 26 mm, and a height of 2150 mm. A laminate obtained by combining the left and right symmetrical trapezoids and cutting out into a shape having a length of 2400 mm and laminating six pieces was placed on a glass cloth prepreg sheet A as a base pipe portion.

Further, as the third to fifth reinforcing layers, a pitch-derived highly elastic carbon fiber prepreg sheet B is formed of a rectangular shape having a width of 17 mm and a length of 250 mm and a symmetrical trapezoid having an upper base of 9 mm, a lower base of 17 mm, and a height of 2150 mm. A combined laminated body obtained by laminating six pieces cut into a shape having a length of 2400 mm was placed on the laminated bodies as the first and second reinforcing layers. Due to the laminated structure of the reinforcing layers described above, in the support member of Comparative Example 1, the highly elastic carbon fiber prepreg sheet B derived from the pitch is disposed over the entire length of the mandrel.
[Comparative Example 2]

The support member of Comparative Example 2 is different from the support member of Comparative Example 1 in that a PAN-derived carbon fiber prepreg sheet C is used instead of the pitch-derived highly elastic carbon fiber prepreg sheet B. Other points of the support member of Comparative Example 2 are the same as those of the support member of Comparative Example 1. In the support member of Comparative Example 2, the PAN-derived carbon fiber prepreg sheet C is disposed over the entire length of the mandrel.
[Comparative Example 3]

  The support member of Comparative Example 3 is different from the support member of Example 1 in that the structure of the reinforcing layer is different. Other points of the support member of Comparative Example 3 are the same as those of the support member of Example 1. In Comparative Example 3, as the first and second reinforcing layers, a pitch-derived highly elastic carbon fiber prepreg sheet B is made of a rectangle having a width of 26 mm and a length of 250 mm, an upper base of 14 mm, a lower base of 26 mm, and a height of 2150 mm. Cut into a shape of 2400 mm in length with a combination of symmetrical trapezoids, 6 sheets were laminated on the glass cloth prepreg sheet A as the base pipe part 10. Furthermore, as a third to fifth reinforcing layer, a PAN-derived carbon fiber prepreg sheet C is symmetrical with a rectangle having a width of 17 mm and a length of 250 mm, and an upper base of 9 mm, a lower base of 17 mm, and a height of 2150 mm. Six pieces cut into a shape having a length of 2400 mm combined with trapezoids were stacked.

Due to the laminated structure of the reinforcing layers described above, in the support member of Comparative Example 3, the PAN-derived carbon fiber prepreg sheet C extending over the entire length of the mandrel on the outside of the pitch-derived highly elastic carbon fiber prepreg sheet B extending over the entire length of the mandrel. Will be placed. In addition, as mentioned above, in the above Examples 1-3 and Comparative Examples 1-3, each reinforcement layer is formed only in the part which becomes an upper side and a lower side of a perpendicular direction when using.
[Measuring method]

With respect to the support members of Examples 1 to 3 and Comparative Examples 1 to 3 prepared as described above, load deflection was measured by the following procedure. First, the support member mounting part D1 shown in FIG. 7A is firmly joined to the proximal side (base end side) of each support member. The component D1 is manufactured from a metal such as aluminum, and includes a bonding portion P1 that is inserted into a support member to be bonded and bonded, and a fixing portion P2 that is attached to the robot side, the LCD storage cassette side, or the like. The length of the bonding part P1 is 200 mm, and this mounting part D1 is bonded to the supporting members manufactured as examples and comparative examples with an epoxy adhesive. Then, the fixing | fixed part P2 was attached to the horizontal surface of the fixed base, and it fastened with the volt | bolt, Each support member was hold | maintained horizontally and it was set as the cantilever state. Then, a weight of 650 g was suspended at a position 10 mm from the tip of each support member, and the deflection (load deflection) in the vertical direction of each support member was measured.
[Measurement result]

  By the above measurement, the results shown in the table of FIG. 8 were obtained. In the table of FIG. 8, specific dimensions, materials, and the like of each part of the support members of Examples 1 to 3 and Comparative Examples 1 to 3 are also shown. As shown in FIG. 8, in any of the support members of Examples 1 to 3, pitch-derived high-elasticity carbon fibers (pitch-derived high-elasticity carbon fiber prepreg sheet B) over the entire reinforcing layer (full length of the support member). Compared with the support member of Comparative Example 1 using the material, the amount of pitch-derived highly elastic carbon fibers is reduced by 30% to 64%, and the increase in load deflection (that is, the decrease in bending rigidity) is suppressed. I was able to.

  Moreover, also in any support member of Examples 1-3, the support member of the comparative example 2 using the PAN-derived carbon fiber (PAN-derived carbon fiber prepreg sheet C) over the entire reinforcing layer (full length of the support member) and In comparison, the load deflection could be greatly reduced.

Furthermore, the pitch-derived high elastic carbon fiber (pitch-derived high elastic carbon fiber prepreg sheet B) is used for the inner layer of the reinforcing layer extending over the entire length of the support member, and the PAN-derived carbon fiber is used for the outer layer of the reinforcing layer. Although the support member of Comparative Example 3 using (PAN-derived carbon fiber prepreg sheet C) compared to the support member of Comparative Example 1, the amount of pitch-derived highly elastic carbon fibers can be reduced by 40%. According to the support member of Example 2, the usage amount of the high-elasticity carbon fiber derived from the pitch can be further reduced to 46.5%, and the deflection of the load can be further reduced (that is, higher bending rigidity can be obtained). Maintained).
[Example 4]

  First, a mandrel made of steel as a core material was prepared. The mandrel includes a straight portion on the fixed end side, that is, a range in which the cross-sectional shape and dimensions do not change, and a tapered portion on the free end side, that is, a range in which the outer circumference becomes shorter toward the free end. The shape of the mandrel is a solid circular cross section in the straight range on the fixed end side, and a shape obtained by cutting off the tip portion from the cone (that is, a truncated cone shape) in the taper range on the free end side. The mandrel has a distal end diameter of 15 mm and a proximal end diameter of 27 mm. The total length is 2400 mm, the range of 200 mm on the fixed end side is a straight round bar-shaped straight range of 27 mm in diameter, and the range of 2200 mm on the free end side is tapered. Here, the distal end corresponds to the end on the other end 1b side of the support member 1A, and the proximal end corresponds to the end on the one end 1a side of the support member 1A.

  Subsequently, at the base end side of 200 mm, it has a straight range with an outer diameter of 30 mm, the length of the outer circumference decreases toward the free end side, and the outer diameter becomes 18 mm on the distal end side, with a wall thickness of 1.5 mm, In order to form a hollow base pipe portion having a length of 2400 mm, the glass cloth prepreg sheet A was wound around the mandrel and laminated several times. The orientation direction of the glass fiber was the longitudinal direction (0 °) and the circumferential direction (90 °) of the mandrel. The glass cloth prepreg sheet A used was the same as described above.

  Subsequently, as a first reinforcing layer, a highly elastic carbon fiber prepreg sheet B derived from pitch is combined with a rectangle with a width of 24 mm and a length of 200 mm, and a symmetrical trapezoid with an upper base of 18 mm, a lower base of 24 mm, and a height of 1400 mm. Two glass laminate prepreg sheets were prepared by preparing two sets of laminated bodies that were cut into a shape of 1600 mm in length and laminated, and wound around the mandrel so that the longitudinal direction of the mandrel and the orientation direction of the carbon fibers substantially coincided Arranged on A. In that case, each laminated body was arrange | positioned to each of the part (for example, the part corresponding to the upper part 11A and the lower part 12A of the base pipe part 10A) which corresponds to the upper side and the lower side in the vertical direction during use. In the prepreg sheet B having a length of 1600 mm, which is the first reinforcing layer, the carbon fibers are continuous in the longitudinal direction.

  In particular, the lower side of the highly elastic carbon fiber prepreg sheet B derived from the pitch of each laminate, and the portion with a width of 24 mm were made to coincide with the base end of the mandrel. Therefore, the highly elastic carbon fiber prepreg sheet B derived from the pitch of the first reinforcing layer is disposed in the range of 1600 mm on the base end side of the mandrel. When arranging each laminate, the central axis of the base pipe portion along the longitudinal direction of the mandrel and the central axis in the longitudinal direction of the trapezoidal shape of the highly elastic carbon fiber prepreg sheet B derived from the pitch of each laminate are: In order to match the vertical direction. Moreover, as the highly elastic carbon fiber prepreg sheet B derived from pitch, the same one as described above was used.

  Subsequently, as a second reinforcing layer, a PAN-derived carbon fiber prepreg sheet C is cut into a symmetrical trapezoidal shape having an upper base of 14 mm, a lower base of 18 mm, and a height of 800 mm, and a laminate of two is laminated. A set was prepared, and the laminate was disposed on the glass cloth prepreg sheet A wound around the mandrel so that the longitudinal direction of the mandrel and the orientation direction of the carbon fibers substantially coincided. In that case, each laminated body was arrange | positioned to each of the part (for example, the part corresponding to the upper part 11A and the lower part 12A of the base pipe part 10A) which corresponds to the upper side and the lower side in the vertical direction during use.

  In particular, the upper base of the PAN-derived carbon fiber prepreg sheet C of each laminate was made to coincide with the tip of the mandrel. Therefore, the PAN-derived carbon fiber prepreg sheet C of the second reinforcing layer is disposed in a range of 800 mm on the tip side of the mandrel. When arranging each laminate, the central axis of the base pipe portion along the longitudinal direction of the mandrel and the central axis in the longitudinal direction of the trapezoidal shape of the carbon fiber prepreg sheet C derived from the PAN of each laminate are vertical. Match the direction. As the PAN-derived carbon fiber prepreg sheet C, the same one as described above was used.

  Subsequently, as a third reinforcing layer, a carbon fiber prepreg sheet C derived from PAN was combined with a rectangle having a width of 24 mm and a length of 200 mm, and a symmetrical trapezoid having an upper base of 14 mm, a lower base of 24 mm, and a height of 2200 mm. Cut out into a shape of 2400 mm in length, prepare two sets of each one, and high elasticity carbon fiber prepreg derived from the pitch of the first reinforcing layer so that the longitudinal direction of the mandrel and the orientation direction of the carbon fiber substantially coincide One sheet was placed on the sheet B and the PAN-derived carbon fiber prepreg sheet C of the second reinforcing layer. At that time, the prepreg sheet C as the third reinforcing layer is applied to each of the portions corresponding to the upper side and the lower side in the vertical direction during use (for example, the portions corresponding to the upper portion 11A and the lower portion 12A of the base pipe portion 10A). Arranged one by one. The PAN-derived carbon fiber prepreg sheet C of the third reinforcing layer is disposed over the entire length of the mandrel.

  Here, the laminated body of the highly elastic carbon fiber prepreg sheet B derived from the pitch as the first reinforcing layer corresponds to the first reinforcing region 21 of the reinforcing portion 20 of the supporting member 1A, and serves as the second reinforcing layer. The laminate of the PAN-derived carbon fiber prepreg sheet C corresponds to the second reinforcing region 22 of the reinforcing portion 20 of the supporting member 1A, and the PAN-derived carbon fiber prepreg sheet C as the third reinforcing layer is a supporting member. This corresponds to the reinforcing portion 30 of 1A.

  Due to the laminated structure of the reinforcing layers described above, in the support member of Example 4, the pitch-derived highly elastic carbon fiber prepreg sheet B is disposed in the range of the proximal end side 2/3 of the mandrel, and the distal end side 1/3 of the mandrel The PAN-derived carbon fiber prepreg sheet C is arranged in the range of, and the outside thereof is covered with the PAN-derived carbon fiber prepreg sheet C over the entire length of the mandrel. Also, when focusing on the cross section along the direction intersecting the longitudinal direction of the mandrel, carbon in the upper and lower 90 ° range in the vertical direction outside the 1.5 mm thick base pipe portion made of glass cloth prepreg sheet. The first and second reinforcing layers having a thickness of 1 mm made of a fiber prepreg sheet are laminated, and the third reinforcing layer having a thickness of 0.24 mm made of a carbon fiber prepreg sheet is laminated.

After the above prepreg laminating process, each prepreg sheet is fixed by wrapping a tape that shrinks when heated, such as polypropylene tape or PET tape, from the outside to fix each prepreg sheet, and simultaneously heating the base pipe portion and the reinforcing layer in an oven. Cured. At this time, the temperature was raised at 2 ° C./min and held at 140 ° C. for 120 minutes, and then returned to room temperature by natural cooling. Finally, the support member of Example 4 corresponding to the hollow pipe-shaped support member 1A was obtained by extracting the mandrel.
[Example 5]

  The support member of Example 5 differs from the support member of Example 4 in that the dimensions of the carbon fiber prepreg sheet of the laminate as the first and second reinforcing layers are different. Other points of the support member of Example 5 are the same as those of the support member of Example 4. That is, in Example 5, for the laminated body of the first reinforcing layer, the pitch-derived highly elastic carbon fiber prepreg sheet B is a rectangle having a width of 24 mm and a length of 200 mm, an upper base of 19 mm, a lower base of 24 mm, Cut into a shape of length 1200, which is a combination of symmetrical trapezoids with a height of 1000 mm. Further, for the laminate of the second reinforcing layer, the PAN-derived carbon fiber prepreg sheet C was cut into a symmetrical trapezoidal shape having an upper base of 14 mm, a lower base of 19 mm, and a height of 1200 mm.

With the laminated structure of the reinforcing layer described above, in the support member of Example 5, the high-elasticity carbon fiber prepreg sheet B derived from the pitch is arranged in the range of the base end side 1/2 of the mandrel, and the mandrel front end side 1/2 The PAN-derived carbon fiber prepreg sheet C is arranged in the range of, and the outside thereof is covered with the PAN-derived carbon fiber prepreg sheet C over the entire length of the mandrel.
[Example 6]

  The support member of Example 6 differs from the support member of Example 4 in that the dimensions of the carbon fiber prepreg sheet of the laminate as the first and second reinforcing layers are different. Other points of the support member of Example 6 are the same as those of the support member of Example 4. In Example 6, for the laminated body of the first reinforcing layer, the pitch-derived high-elasticity carbon fiber prepreg sheet B is made of a rectangle having a width of 24 mm and a length of 200 mm, an upper base of 21 mm, a lower base of 24 mm, and a height. It was cut into a shape of 800 mm in length, which was combined with a 600 mm symmetrical trapezoid. Further, for the laminate of the second reinforcing layer, the PAN-derived carbon fiber prepreg sheet C was cut into a symmetrical trapezoidal shape having an upper base of 14 mm, a lower base of 21 mm, and a height of 1600 mm.

With the laminated structure of the reinforcing layers described above, in the support member of Example 6, the high-elasticity carbon fiber prepreg sheet B derived from the pitch is disposed in the range of the proximal end side 1/3 of the mandrel, and the distal end side 2/3 of the mandrel The PAN-derived carbon fiber prepreg sheet C is arranged in the range of, and the outside thereof is covered with the PAN-derived carbon fiber prepreg sheet C over the entire length of the mandrel.
[Comparative Example 4]

The support member of Comparative Example 4 is different from the support member of Example 4 in that the structure of the reinforcing layer is different. Other points of the support member of Comparative Example 4 are the same as those of the support member of Example 4. In Comparative Example 4, as the first and second reinforcing layers, pitch-derived highly elastic carbon fiber prepreg sheet B is made of a rectangle having a width of 24 mm and a length of 200 mm, an upper base of 14 mm, a lower base of 24 mm, and a height of 2200 mm. Two sets of laminated bodies obtained by cutting out into a shape having a length of 2400 mm combined with a symmetrical trapezoid and stacking four sheets were prepared and placed on a glass cloth prepreg sheet A as a base pipe portion. In the support member of Comparative Example 4, the highly elastic carbon fiber prepreg sheet B derived from the pitch is disposed over the entire length of the mandrel.
[Comparative Example 5]

The support member of Comparative Example 5 differs from the support member of Comparative Example 4 in that a PAN-derived carbon fiber prepreg sheet C is used instead of the pitch-derived highly elastic carbon fiber prepreg sheet B. Other points of the support member of Comparative Example 5 are the same as those of the support member of Comparative Example 4. In the support member of Comparative Example 5, the PAN-derived carbon fiber prepreg sheet C is disposed over the entire length of the mandrel.
[Comparative Example 6]

  The support member of Comparative Example 6 differs from the support member of Example 4 in the structure of the reinforcing layer. Other points of the support member of Comparative Example 6 are the same as those of the support member of Example 4. In Comparative Example 6, as the first and second reinforcing layers, pitch-derived highly elastic carbon fiber prepreg sheet B is made of a rectangle with a width of 24 mm and a length of 200 mm, an upper base of 14 mm, a lower base of 24 mm, and a height of 2200 mm. Combined with a symmetrical trapezoidal shape, cut into a shape of 2400 mm in length and laminated, and PAN-derived carbon fiber prepreg sheet C, a rectangle with a width of 24 mm and a length of 200 mm, an upper base of 14 mm, a lower base of 24 mm, Two sets of laminates made by laminating a total of 4 carbon fiber prepreg sheets by laminating one by one pieces cut into a shape of 2400 mm in length, combined with a 2200 mm height symmetrical trapezoid Prepared. And the laminated body was arrange | positioned on the glass cloth prepreg sheet A as a base pipe part.

Due to the laminated structure of the reinforcing layers described above, in the support member of Comparative Example 6, the PAN-derived carbon fiber prepreg sheet C extending over the entire length of the mandrel is provided outside the highly elastic carbon fiber prepreg sheet B derived from the pitch extending over the entire length of the mandrel. Will be placed. In addition, as above-mentioned, in the above Examples 4-6 and Comparative Examples 4-6, when using, each reinforcement layer is formed only in the part which becomes the upper side and lower side of a perpendicular direction.
[Measuring method]

With respect to the support members of Examples 4 to 6 and Comparative Examples 4 to 6 prepared as described above, load deflection was measured by the following procedure. First, the support member mounting part D2 shown in FIG. 7B is firmly engaged with the proximal side (base end side) of each support member. The component D2 is manufactured from a metal such as iron, and includes a bonding portion P3 that is inserted into a support member to be bonded and bonded, and a fixing portion P4 that is attached to the robot side, the LCD storage cassette side, or the like. The length of the bonding portion P3 is 150 mm, and the mounting component D2 is bonded to the support member manufactured as the example and the comparative example with an epoxy adhesive. Thereafter, the fixed portion P4 was attached to the vertical surface of the fixed base and tightened with bolts, whereby each support member was held horizontally to be in a cantilever state. Then, a weight of 300 g was suspended at a position 10 mm from the tip of each support member, and the vertical deflection (load deflection) of each support member was measured.
[Measurement result]

  By the above measurement, the results shown in the table of FIG. 9 were obtained. In addition, the specific dimension, material, etc. of each part of the support member of Examples 4-6 and Comparative Examples 4-6 are also shown by FIG. As shown in FIG. 9, in any of the supporting members of Examples 4 to 6, pitch-derived high elastic carbon fibers (pitch-derived high elastic carbon fiber prepreg sheet B) over the entire reinforcing layer (full length of the supporting member). Compared with the support member of Comparative Example 4 using the material, the amount of high-elastic carbon fiber derived from pitch is reduced by 28% to 61%, while the increase in load deflection (that is, the decrease in bending rigidity) is suppressed. I was able to.

  In any of the support members of Examples 4 to 6, the support member of Comparative Example 5 using PAN-derived carbon fibers (PAN-derived carbon fiber prepreg sheet C) over the entire reinforcing layer (full length of the support member) In comparison, the load deflection could be greatly reduced.

  Furthermore, the pitch-derived high elastic carbon fiber (pitch-derived high elastic carbon fiber prepreg sheet B) is used for the inner layer of the reinforcing layer extending over the entire length of the support member, and the PAN-derived carbon fiber is used for the outer layer of the reinforcing layer. The support member of Comparative Example 6 using (PAN-derived carbon fiber prepreg sheet C) can reduce the amount of pitch-derived highly elastic carbon fiber used by 24.0% compared to the support member of Comparative Example 4. However, according to the support member of Example 4, it was possible to reduce the usage amount of the highly elastic carbon fiber derived from the pitch as much as 28.0% and to further reduce the load deflection (that is, higher bending). The rigidity was maintained).

  DESCRIPTION OF SYMBOLS 1, 1A ... Support member, 1a ... One end part, 1b ... Other end part, 10, 10A ... Base pipe part, 11 ... Upper part, 12 ... Lower part, 20 ... Reinforcement part, 21 ... 1st reinforcement area | region, 22 ... 2nd reinforcement area | region.

Claims (6)

A hollow pipe-shaped support member that is used in a cantilever state with one end fixed and the other end fixed,
A base pipe portion extending from the one end portion to the other end portion;
A reinforcing part that is formed on each of the upper part and the lower part that oppose the upper part when used in the base pipe part and extends from the one end part to the other end part; and
Another reinforcing part formed on the reinforcing part so as to cover the entire reinforcing part and extending from the one end to the other end;
With
The base pipe portion is made of a fiber reinforced composite resin material,
The reinforcing portion includes a first reinforcing region and a second reinforcing region arranged in a direction from the one end portion toward the other end portion,
The first reinforcing region, the second reinforcing region , and the another reinforcing portion are made of a carbon fiber reinforced composite resin material,
The orientation direction of the carbon fibers of the carbon fiber reinforced composite resin material constituting the first reinforcement region, the second reinforcement region , and the another reinforcement portion is a direction from the one end portion toward the other end portion. Are almost identical,
The tensile elastic modulus of the carbon fiber of the carbon fiber reinforced composite resin material constituting the first reinforcing region is larger than the tensile elastic modulus of the carbon fiber of the carbon fiber reinforced composite resin material constituting the second reinforcing region,
A support member. The tensile elastic modulus of the carbon fiber of the carbon fiber reinforced composite resin material constituting the first reinforcing region is 400 GPa or more and 900 GPa or less,
The tensile elastic modulus of the carbon fiber of the carbon fiber reinforced composite resin material constituting the second reinforcing region is 200 GPa or more and less than 400 GPa.
The support member according to claim 1. In the direction from the one end to the other end, the length of the first reinforcing region is 30% or more and 70% or less of the total length of the support member;
In the direction from the one end to the other end, the length of the second reinforcement region is within a range in which the total length of the first region is 100% or less of the total length of the support member. 30% or more and 70% or less of the total length of the support member,
The support member according to claim 1 or 2, characterized in that. The carbon fiber of the carbon fiber reinforced composite resin material constituting the first reinforcing region is a pitch-derived carbon fiber,
The carbon fiber of the carbon fiber reinforced composite resin material constituting the second reinforcing region is a carbon fiber derived from polyacrylonitrile.
The support member according to any one of claims 1 to 3, wherein the support member is provided.   The support member according to any one of claims 1 to 4, wherein a length of an outer periphery of the one end portion is longer than a length of an outer periphery of the other end portion.   The said base pipe part is comprised from the glass fiber reinforced composite resin material, The support member as described in any one of Claims 1-5 characterized by the above-mentioned.

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