Molded surface fastener

Patent metadata

Field	Value
Publication number	US-11284681-B2
Application number	US-201716500090-A
Country	US
Kind code	B2
Filing date	Apr 3, 2017
Priority date	Apr 3, 2017
Publication date	Mar 29, 2022
Grant date	Mar 29, 2022

Abstract

Provided is a molding apparatus used for manufacturing a molded surface fastener wherein a die wheel driving rotationally has a concentric double cylinder structure provided with an outer side cylindrical body that has provided therethrough a plurality of penetrating holes, and an inner side cylindrical body that has formed, in the outer peripheral surface thereof, a plurality of grooved portions, the grooved portions located in the inner side cylindrical body include a use grooved portion that intersects with the penetrating hole of the outer side cylindrical body and a non-use grooved portion that is covered by the inner peripheral surface of the outer side cylindrical body. By using this molding apparatus obtained is a molded surface fastener in which a plurality of types of engaging elements having different shapes in a plan view are arranged cyclically in a reference direction.

First claim

The invention claimed is:

1. A synthetic resin molded surface fastener having a plate-shaped base portion and a plurality of engaging elements standing on an upper surface of the base portion wherein:
the engaging elements are disposed to have a constant pitch along a reference direction when at least one direction is defined as the reference direction,
each of the engaging elements has a stem portion standing up from the upper surface of the base portion and at least one pawl portion disposed at a top end part of the engaging element and protruded outward from an upper end outer peripheral edge of the stem portion in a plan view of the engaging element or an extended portion extending outward from the upper end outer peripheral edge of the stem portion in the plan view,
a plurality of the engaging elements disposed along the reference direction include at least two kinds of the engaging elements having different position relations of the pawl portion or extended portion with respect to the stem portion in the plan view of the engaging element from each other, and
a same kind of the engaging elements having the same position relation of the pawl portion or extended portion in the plan view of the engaging element are disposed at a constant cycle along the reference direction.

2. A synthetic resin molded surface fastener having a plate-shaped base portion and a plurality of engaging elements standing on an upper surface of the base portion wherein:
the engaging elements are disposed to have a constant pitch along a reference direction when at least one direction is defined as the reference direction,
each of the engaging elements has a stem portion standing up from the base portion, an engaging head portion bulging outward from an upper end outer peripheral part of the stem portion and formed integrally to the stem portion, and at least one pawl portion protruded outward from an outer peripheral edge part of the engaging head portion or an extended portion extending outward from the outer peripheral edge part of the engaging head portion,
a plurality of the engaging elements disposed along the reference direction include at least two kinds of the engaging elements having different position relations of the pawl portion or extended portion with respect to the stem portion from each other in a plan view of the engaging element, and
a same kind of the engaging elements having the same position relation of the pawl portion or extended portion in the plan view of the engaging element are disposed at a constant cycle along the reference direction.

3. The molded surface fastener according to claim 1 wherein at least one of the engaging elements having the at least one pawl portion is disposed in the constant cycle in the reference direction.

4. The molded surface fastener according to claim 1 wherein a number of engaging elements forming the cycle in the reference direction is less than 40.

5. The molded surface fastener according to claim 1 wherein adjacent engaging elements in the reference direction in at least a part of the engaging elements are formed to have different shapes in a plan view of the engaging elements.

6. The molded surface fastener according to claim 1 wherein, when each engaging element is viewed to divide into a first end part area including an end part on one side in the reference direction, a center area including a center part in the reference direction and a second end part area including an end part on the other side in the reference direction in a plan view of the engaging element, the engaging element has a first shape element that two of the pawl portions are disposed on the center area per one engaging element, a second shape element that two of the pawl portions are disposed on the first end part area or the second end part area per one engaging element, and a third shape element that four of the pawl portions or the extended portion are disposed per one engaging element, and
the first shape element, the second shape element and the third shape element are disposed at a predetermined placement pattern in each cycle.

7. The molded surface fastener according to claim 1 wherein a shape of the engaging elements in a plan view is changed step by step along the reference direction.

8. The molded surface fastener according to claim 1 wherein the reference direction is a length direction of the base portion.

9. The molded surface fastener according to claim 1 wherein the same kind of the engaging elements having the same shape in a plan view of the engaging elements are disposed along a direction perpendicular to the reference direction.

10. The molded surface fastener according to claim 2 wherein at least one of the engaging elements having the at least one pawl portion is disposed in the constant cycle in the reference direction.

11. The molded surface fastener according to claim 2 wherein a number of engaging elements forming the cycle in the reference direction is less than 40.

12. The molded surface fastener according to claim 2 wherein adjacent engaging elements in the reference direction in at least a part of the engaging elements are formed to have different shapes in a plan view of the engaging elements.

13. The molded surface fastener according to claim 2 wherein, when each engaging element is viewed to divide into a first end part area including an end part on one side in the reference direction, a center area including a center part in the reference direction and a second end part area including an end part on the other side in the reference direction in a plan view of the engaging element, the engaging element has a first shape element that two pawl portions are disposed on the center area per one engaging element, a second shape element that two of the pawl portions are disposed on the first end part area or the second end part area per one engaging element, and a third shape element that four of the pawl portions or the extended portion are disposed per one engaging element, and
the first shape element, the second shape element and the third shape element are disposed at a predetermined placement pattern in each cycle.

14. The molded surface fastener according to claim 2 wherein a shape of the engaging elements in a plan view is changed step by step along the reference direction.

15. The molded surface fastener according to claim 2 wherein the reference direction is a length direction of the base portion.

16. The molded surface fastener according to claim 2 wherein the same kind of the engaging elements having the same shape in a plan view of the engaging elements are disposed along a direction perpendicular to the reference direction.

Assignees

• Ykk Corp

Inventors

• Takekawa Makoto
• Fukuhara Yoshiyuki
• Yamashita Hiroyuki
• Michihata Isamu
• Hashimoto Yui

Classifications

• A44B18/0069

  Details · CPC title

• A44B18/0061

  Male or hook elements (A44B18/0053 takes precedence) · CPC title

• A44B18/0049 Primary

  obtained by moulding processes (compression moulding or articles of indefinite length characterised by the shape of the surface B29C43/222; screen moulding B29C67/08) · CPC title

• A44B18/0011

  Female or loop elements (A44B18/0007 takes precedence) · CPC title

• B29C43/46

  Rollers · CPC title