摘要:
An object is to achieve a golf club shaft and a method of producing the same, wherein the weight balance in the shaft longitudinal direction can be reproducibly and easily set and wherein the golf club shaft is produced at a low cost and has high durability. The golf club shaft includes a hollow-cylindrical shaft body made of fiber-reinforced resin and a weight-adding cylinder installed in a cylindrical space of the shaft body. At least a part of an outer diameter side of the weight-adding cylinder is embedded in an cylindrical embedded recess that is formed in an inner wall of the shaft body, wherein a grip-side cylindrical end surface of the weight-adding cylinder and a grip-side cylindrical end surface of the cylindrical embedded recess are in contact with each other.
摘要:
An object is to achieve a golf club shaft and a method of producing the same, wherein the weight balance in the shaft longitudinal direction can be reproducibly and easily set and wherein the golf club shaft is produced at a low cost and has high durability. The golf club shaft includes a hollow-cylindrical shaft body made of fiber-reinforced resin and a weight-adding cylinder installed in a cylindrical space of the shaft body. At least a part of an outer diameter side of the weight-adding cylinder is embedded in an cylindrical embedded recess that is formed in an inner wall of the shaft body, wherein a grip-side cylindrical end surface of the weight-adding cylinder and a grip-side cylindrical end surface of the cylindrical embedded recess are in contact with each other.
摘要:
A golf club shaft is provided in which the flexural rigidity of the distal end portion can be improved with no change in flexural rigidity on the proximal end while the dispersion in the values of the flexural rigidity in the circumferential direction can be reduced without the use of a distal-end reinforcing layer that causes discontinuous points in the lengthwise direction in flexural rigidity. A golf club shaft is provided which satisfies the following conditions: that the golf club shaft includes at least three rectangular carbon prepregs as full-length layers, that all the rectangular carbon prepregs are each composed of a 0-degree layer, the long fiber direction of which is coincident with the longitudinal direction of the golf club shaft, that all the rectangular carbon prepregs are configured such that the amount of overlapping of each rectangular carbon prepreg is zero on the large-diameter proximal end portion of the gold club shaft and increasingly overlaps at positions increasingly toward the distal end of the golf club shaft, and that wind start positions of the rectangular carbon prepregs are different from one another.
摘要:
A golf club shaft is provided in which the flexural rigidity of the distal end portion can be improved with no change in flexural rigidity on the proximal end while the dispersion in the values of the flexural rigidity in the circumferential direction can be reduced without the use of a distal-end reinforcing layer that causes discontinuous points in the lengthwise direction in flexural rigidity. A golf club shaft is provided which satisfies the following conditions: that the golf club shaft includes at least three rectangular carbon prepregs as full-length layers, that all the rectangular carbon prepregs are each composed of a 0-degree layer, the long fiber direction of which is coincident with the longitudinal direction of the golf club shaft, that all the rectangular carbon prepregs are configured such that the amount of overlapping of each rectangular carbon prepreg is zero on the large-diameter proximal end portion of the gold club shaft and increasingly overlaps at positions increasingly toward the distal end of the golf club shaft, and that wind start positions of the rectangular carbon prepregs are different from one another.
摘要:
A golf club shaft formed by winding prepregs made of uncured thermosetting resin into a tapered shape and curing the prepregs thermally, the prepregs include a first woven fabric prepreg which is made of one of a triaxial woven fabric or a tetra-axial woven fabric that are impregnated with uncured thermosetting resin, and a second woven fabric prepreg which is made of one of a triaxial woven fabric or a tetra-axial woven fabric that are impregnated with uncured thermosetting resin.
摘要:
A golf club shaft formed by winding prepregs made of uncured thermosetting resin into a tapered shape and curing the prepregs thermally, the prepregs include a first woven fabric prepreg which is made of one of a triaxial woven fabric or a tetra-axial woven fabric that are impregnated with uncured thermosetting resin, and a second woven fabric prepreg which is made of one of a triaxial woven fabric or a tetra-axial woven fabric that are impregnated with uncured thermosetting resin.
摘要:
A golf club shaft formed by winding prepregs made of uncured thermosetting resin into a tapered shape and curing the prepregs thermally, the prepregs include a first woven fabric prepreg which is made of one of a triaxial woven fabric or a tetra-axial woven fabric that are impregnated with uncured thermosetting resin, and a second woven fabric prepreg which is made of one of a triaxial woven fabric or a tetra-axial woven fabric that are impregnated with uncured thermosetting resin.
摘要:
A golf club shaft formed by winding prepregs made of uncured thermosetting resin into a tapered shape and curing the prepregs thermally, the prepregs include a first woven fabric prepreg which is made of one of a triaxial woven fabric or a tetra-axial woven fabric that are impregnated with uncured thermosetting resin, and a second woven fabric prepreg which is made of one of a triaxial woven fabric or a tetra-axial woven fabric that are impregnated with uncured thermosetting resin.
摘要:
This invention provides a delivery system which enables desired day and time of delivery and a relevant address and name to be notified to a delivery service operator while keeping the point of contact whose disclosure is not desired by the receiver of delivery. A business information processing device, using an identifier, accesses an information processing terminal storing delivery destination information regarding the address and name and the point of contact whose disclosure is not desired. The terminal, upon receiving a request for disclosure or a notification, transfers the request to a transferee terminal and obtains the user's consent or any desired information. The terminal is relieved of the need to disclose the confidential point of contact arbitrarily by transmitting only delivery destination information and any desired information to a business information processing device.
摘要:
Disclosed is a copolymer represented by the following general formula (1): ##STR1## wherein R.sub.1 represents a group based on a polymer or a copolymer possessing electroconductivity and inducing coloration or discoloration on being oxidized or reduced, R.sub.2 and R.sub.3 represent independently a hydrogen atom or an alkyl group having 1 to 1,000 carbon atoms, A represents a group possessing polarity and exhibiting affinity for ions, and L and M are independently an integer of at least 1, providing that the total degree of polymerization is an integer in the range of 10 to 12,000. The copolymer may be a block copolymer or a random copolymer. This copolymer exhibits electrochromism and, therefore, is useful as a coloring-discoloring material which induces coloration or discoloration on being oxidized or reduced, particularly as an electrochromic substance used in an electrochromic display device.