Hat

Abstract

To provide a lightweight hat that ensures strength against an impact from side and oblique directions other than from above, and reduces discomfort to a user.SOLUTION: In a development view (11), a hat (1) is configured in which a rectangular improved sea cucumber folding element (21) is arranged, the improved sea cucumber folding element (21) having four third fold lines (24) that connect end portions (23a) on a central side of four second fold lines (23) and are formed inside a first folding line (22) and have a folding direction different from that of the first folding line (22), and four fourth folding lines (26) that are formed on extensions of the second folding line (23) and connect the second folding line (23) to a node (25) and have a folding direction different from that of the second folding line (23).SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a hat worn on a person's head, and more particularly to a hat suitable for a helmet, a protective cap, etc. for protecting a person's head.

Background Art

[0002] In recent years, for the safety of cycling, wearing a helmet has been made an effort obligation by law. When in use such as during cycling, a helmet needs to cover the head and have sufficient strength. On the other hand, in conventional helmets, when trying to ensure strength, they tend to become heavy. Regarding a hat-shaped folding structure formed by folding a sheet, the techniques described in Patent Documents 1 and 2 are known.

[0003] Patent Documents 1 and 2 describe a folding structure that can be miniaturized by connecting semi-octagonal pyramid-shaped second flat parts (30A) to both ends of a semi-octagonal cylinder-shaped first flat part (20A) and bending along a fold line. Further, Patent Document 1 describes a folding structure that can be miniaturized by connecting spindle-shaped flat parts (20B, 30B) and bending along a fold line.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] (Problems of the Prior Art) In the prior arts of Patent Documents 1 and 2, the sheets are combined to form a structure, which is expected to be lightweight and to withstand vertical loads from above as a work helmet. However, as a helmet for a bicycle or the like, higher strength against loads from the side or the diagonal direction rather than from above is required, and the configurations described in Patent Documents 1 and 2 have a problem of being insufficient.

[0006] FIG. 12 is an external view of a part of a prior art sea cucumber fold hat. FIG. 13 is a development view of FIG. 12, FIG. 13A is an overall view, and FIG. 13B is an enlarged view of one sea cucumber fold element. Even outside Patent Documents 1 and 2, as a hat-shaped foldable structure formed by folding a sheet, it is conceivable to make a hat 01 in a folding method called a conventionally known "sea cucumber fold" as shown in FIG. 12. The sea cucumber fold hat 01 is configured by being folded with mountain fold lines and valley fold lines in a development view 02 shown in FIG. 13. In the present specification, the mountain fold lines in the development view are indicated by dashed-dotted lines, and the valley fold lines are indicated by broken lines. Note that when the development view 02 is turned inside out, the mountain fold lines and the valley fold lines are also reversed and have an inverse relationship. That is, whether the folding direction is a mountain fold or a valley fold is reversed depending on whether the development view 02 is facing up or down.

[0007] In FIG. 13A, in the sea cucumber fold hat 01, rectangular sea cucumber fold elements 03 are arranged adjacent to each other in a first direction (vertical direction) and a second direction (horizontal direction). The sea cucumber fold elements 03 adjacent in the horizontal direction are arranged shifted by half an element (half of the sea cucumber fold element 03) in the vertical direction. In FIG. 13B, each sea cucumber fold element 03 has four first fold lines 04 formed along the outer edge of a rectangle. Inside the first fold lines 04, four second fold lines 07 are formed that extend from the corners 04a of the rectangle toward the central nodes 06 of the rectangle and have the same folding direction as the first fold lines 04. Also, on the extension of the first fold lines 04 of the adjacent sea cucumber fold elements adjacent in the horizontal direction, fifth fold lines 08 are formed that extend toward the nodes 06 and have a folding direction different from that of the first fold lines 04.

[0008] The conventional sea cucumber-folded hat 01 shown in FIGS. 12 and 13 can disperse an external impact along the surface direction, and it is easy to ensure the strength against impacts not only from the upward direction but also from the side and diagonal directions. Moreover, it can be folded along the fold lines to be miniaturized. However, as shown in FIG. 12, in the conventional sea cucumber-folded hat 01, when the hat 01 is worn, the apex of the node 06 is arranged in a pointed state on the inner side of the hat 01, that is, on the head side of the person wearing the hat 01. Therefore, when the hat 01 is worn, there is a problem that the pointed part contacts the wearer's head, causing discomfort. Also, when an external force acts, there is a risk that the force concentrates on the pointed part, causing injury to the head.

[0009] FIG. 14 is an external view of a bellows-folded hat of the prior art. FIG. 15 is a developed view of the hat of FIG. 14. FIG. 16 is an external view of the state where a load acts on the hat of FIG. 14 from the lateral direction. In addition, as a hat formed by folding a sheet, it is conceivable to produce a hat 011 with a conventionally known "bellows fold" shown in FIGS. 14 to 16. The bellows-folded hat 011 shown in FIG. 14 is formed by connecting four development diagrams 012 shown in FIG. 15. In the development diagram 012 shown in FIG. 15, a plurality of vertical fold lines 013 and 014 extending along the first direction (vertical direction) are formed in parallel at intervals in the second direction (horizontal direction). The vertical fold lines 013 and 014 have different folding directions between adjacent vertical fold lines 013 and 014 in the horizontal direction. That is, the vertical mountain fold lines 013 and the vertical valley fold lines 014 are alternately formed in the horizontal direction. Further, on the upper part in the vertical direction of the development diagram 012, an upwardly inclined fold line 016 and a downwardly inclined fold line 017 are alternately formed in the horizontal direction. The upwardly inclined fold line 016 and the downwardly inclined fold line 017 are set to have the same folding direction (mountain fold in FIG. 15). Furthermore, at the lower part in the vertical direction of the development diagram 012, an upwardly inclined fold line 018 and a downwardly inclined fold line 019 parallel to the upwardly inclined fold line 016 and the downwardly inclined fold line 017 are alternately formed in the horizontal direction. The upwardly inclined fold line 018 and the downwardly inclined fold line 019 are set to have the same folding direction (valley fold in FIG. 15). Note that the vertical fold lines 013 and 014 are set such that the folding direction is reversed (the mountain fold and the valley fold change) at the intersection each time they intersect with the upwardly inclined fold lines 016 and 018 or the downwardly inclined fold lines 017 and 019.

[0010] In the bellows-folded hat 011 shown in FIGS. 14 to 16, as shown in FIG. 16, it is likely to deform when a force is applied to the boundary portion between the side wall portion 021 (the middle in the vertical direction of the development diagram 012) and the brim portion 022 (the lower part of the development diagram 012). Therefore, the bellows-folded hat 011 has a problem that it is difficult to ensure the strength and rigidity against impacts from the outside (especially from the side or diagonal direction).

[0011] An object of the present invention is to provide a hat that is lightweight while ensuring strength against impacts from the side or diagonal direction other than the upward direction, and suppresses discomfort of the user.

Means for Solving the Problems

[0012] To solve the above technical problem, the hat of the invention according to claim 1 is a hat formed by folding a developed view in which mountain fold lines and valley fold lines are formed, in the developed view, rectangular improved sea urchin fold elements are arranged adjacent to each other in a first direction and a second direction intersecting the first direction, and the improved sea urchin fold elements adjacent in the second direction are arranged shifted by half an element along the first direction, the improved sea urchin fold element has four first fold lines formed along the outer edge of the quadrilateral, four second fold lines extending from the corners of the quadrilateral toward the central node of the quadrilateral and having a folding direction different from that of the first fold lines, four third fold lines connecting the central ends of the four second fold lines and formed inside the first fold lines and having a folding direction different from that of the first fold lines, four fourth fold lines formed on the extension of the second fold line to connect the second fold line and the node and having a folding direction different from that of the second fold line, formed on the extension of the first fold line of the adjacent improved sea urchin fold element adjacent in the second direction, extending toward the node, with the central end connected to the third fold line and having the same folding direction as the first fold line, a fifth fold line, formed on the extension of the fifth fold line to connect the fifth fold line and the node and having a folding direction different from that of the fifth fold line, a sixth fold line, and having this as its feature.

[0013] The invention according to claim 2 is the hat according to claim 1, characterized in that it is deformable between a folded state folded by each fold line and a developed state in which each fold line is developed.

[0014] The invention according to claim 3 is the hat according to claim 1, In the development view, a brim portion that is disposed at an end in the second direction and forms a brim of a hat in a folded state along a fold line. It is characterized by comprising the same.

[0015] The invention according to claim 4 is the hat according to claim 1, In the development view, a top portion that is disposed at an end in the second direction and forms a top portion of the hat in a folded state along a fold line. It is characterized by comprising the same.

[0016] The invention according to claim 5 is the hat according to claim 1, A cover disposed to cover the outer periphery of the improved sea cucumber fold element. It is characterized by comprising the same.

[0017] The invention according to claim 6 is the hat according to claim 5, The cover configured to be foldable along a fold line. It is characterized by comprising the same.

Advantages of the Invention

[0018] According to the invention described in claim 1, it is possible to provide a hat that is lightweight while ensuring strength against impacts from lateral and diagonal directions other than the upward direction, and suppresses discomfort of the user. According to the invention described in claim 2, the hat can be folded, and can be made smaller and more compact when not in use. According to the invention described in claim 3, it is possible to produce a hat having a brim, and provide a hat with an appearance according to the preference of the user as compared with a uniform helmet. According to the invention described in claim 4, it is possible to produce a top portion by a folding method other than the improved sea cucumber fold, and provide a hat with an appearance according to the preference of the user. According to the invention described in claim 5, it is possible to cover the uneven appearance of the improved sea cucumber fold with a cover, and make the appearance according to the preference of the user. According to the invention described in claim 6, not only the hat but also the cover can be folded and miniaturized for compact storage when not in use.

Brief Description of the Drawings

[0019]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Modes for Carrying Out the Invention

[0020] Next, with reference to the drawings, an example which is a specific example of an embodiment of the present invention will be described, but the present invention is not limited to the following examples. In the following description using the drawings, illustrations other than the members necessary for the description are appropriately omitted for ease of understanding.

Example

[0021] FIG. 1 is an external view of the hat of Example 1 of the present invention. FIG. 2 is a development view of the hat of FIG. 1, FIG. 2A is a development view for one sheet, and FIG. 2B is an enlarged view of the improved sea cucumber fold element. In FIG. 1, the hat 1 of Example 1 of the present invention has a side wall portion 2, a top portion 3, and an eaves portion 4. The hat 1 can be manufactured by folding along the fold line of the development view 11 shown in FIG. 2. Note that the hat 1 in FIG. 1 is created by connecting seven sheets of the development view 11. That is, along the vertical direction (an example of the first direction) in FIG. 2 and the circumferential direction of the side wall portion 2 in FIG. 1, the other end (upper end) of the second development view is connected to one end (lower end) of the first development view 11, and the hat 1 can be created by connecting the upper end of the first sheet and the lower end of the seventh sheet. Note that the number of connected sheets can be arbitrarily changed according to the size of each sheet of the development view 11, the size of the hat 1 (the length in the circumferential direction of the hat 1), etc., and it can be eight or more or six or less.

[0022] FIG. 3 is an explanatory view of the state in which the hat of FIG. 1 is folded. The connection between the first sheet and the seventh sheet of the development view 11 of the hat 1 of Example 1 is configured to be detachable with buttons. Therefore, by removing the buttons and disconnecting the connection between the first sheet and the seventh sheet and folding along the fold line, it is possible to fold it into the folded state as shown in FIG. 3. Therefore, the hat 1 of Example 1 is deformable between the folded state shown in FIG. 3 and the unfolded state shown in FIG. 1. In addition, when it is used as a protective cap for a bicycle or as a protective cap at a construction site or the like and there is no need to fold it, it is also possible to make it a non-foldable structure by fixing it with glue or an adhesive so that the connection cannot be detached.

[0023] In the development view 11 of FIG. 2, a left part 12 constituting the top part 3, a middle part 13 constituting the side wall part 2, and a right part 14 constituting the eaves part 4 are formed. The middle part 13 of Example 1 is configured in a form in which improved sea urchin folding elements 21 improved from the conventional sea urchin folding element 03 in FIGS. 12 and 13 are filled in a plane. In the middle part 13 of FIG. 2A, in the development view 11 of Example 1, the square improved sea urchin folding elements 21 are arranged adjacent to each other in a first direction (vertical direction) and a second direction (horizontal direction) intersecting the first direction, similar to the conventional sea urchin folding element 03. The improved sea urchin folding elements 21 adjacent in the second direction (horizontal direction) are arranged shifted by half an element in the first direction (vertical direction). That is, with respect to the column 20-1 of the improved sea urchin folding elements 21 arranged in the vertical direction, the column 20-2 of the improved sea urchin folding elements 21 adjacent horizontally is arranged in a state shifted by half an element in the vertical direction.

[0024] In FIG. 2B, each improved sea urchin folding element 21 has four first fold lines 22 formed along the outer edge of a square shape. That is, the first fold lines 22 have a pair of left and right vertical outer edge fold lines 22a, 22b and a pair of upper and lower horizontal outer edge fold lines 22c, 22d. In the development view 11 of FIG. 2B, the first fold lines 22 (22a to 22d) are set as valley folds. Inside the first fold lines 22, four second fold lines 23 are formed that extend from the corners 22e of the square toward the central nodes 25 of the square and have a folding direction different from that of the first fold lines 22 (= mountain fold). In addition, the central ends (inner ends) 23a of the four second fold lines 23 are connected by four third fold lines 24. The third fold lines 24 are formed inside the first fold lines 22 and are set to have a folding direction different from that of the first fold lines 22 (= mountain fold). On the extensions of the four second fold lines 23, a fourth fold line 26 is formed. The four fourth fold lines 26 connect the second fold line 23 (inner end 23a thereof) and the node 25, and are set to have a folding direction different from that of the second fold line 23 (= valley fold).

[0025] In FIGS. 2A and 2B, the improved sea cucumber folding element 21 of Example 1 has a fifth fold line 27 extending horizontally at the central portion in the vertical direction. As a result, the fifth fold line 27 of the improved sea cucumber folding element 21 (21-1) of Example 1 is arranged on the extensions of the horizontal outer edge fold lines 22c and 22d of the adjacent improved sea cucumber folding element 21 (21-2) in the second direction (horizontal direction). The fifth fold line 27 extends toward the node 25, and the central-side end 27a is connected to the third fold line 24. Also, the fifth fold line 27 is set to have the same folding direction as the first fold line 22 (= valley fold). On the extension of the fifth fold line 27, a sixth fold line 28 is formed. The sixth fold line 28 connects the inner end (end 27a) of the fifth fold line 27 and the node 25. The sixth fold line 28 is set to have a folding direction different from that of the fifth fold line 27 (= mountain fold). In Example 1, the boundary portion between the middle part 13 and the right part 14 is deliberately provided with no vertical outer edge fold line 22b so that the eaves portion 4 stands up with respect to the side wall portion 2 instead of being along the side wall portion 2.

[0026] In FIG. 2A, the left part 12 constituting the top part 3 has a bellows fold line similar to the configuration shown in FIGS. 14 to 16. On the left part 12, a top parallel fold line 31 is formed on the extensions of a first fold line 22 and a fifth fold line 27 along the second direction. The top parallel fold line 31 extends along the second direction (lateral direction) and is arranged in parallel at intervals in the first direction (longitudinal direction). In Example 1, the top parallel fold line 31 is set with alternate mountain fold lines and valley fold lines with respect to the second direction. Those on the extension of the fifth fold line 27 are valley folds, and those on the extension of the first fold line 22 are mountain folds. Also, the top parallel fold line 31 on the extension of the first fold line 22 is set so that the mountain fold and the valley fold are switched before and after intersecting with a first top zigzag fold line 32 or a second top zigzag fold line 33 described later.

[0027] Also, on the left part 12, a first top zigzag fold line 32 inclined with respect to the top parallel fold line 31 and a second top zigzag fold line 33 are formed. The first top zigzag fold line 32 and the second top zigzag fold line 33 intersect the top parallel fold line 31 in a zigzag shape. The first top zigzag fold line 32 is formed with a larger inclination angle with respect to the top parallel fold line 31 than the second top zigzag fold line 33. In Example 1, the first top zigzag fold line 32 and the second top zigzag fold line 33 are connected to the outer end 27b of the fifth fold line 27 at the boundary with the middle part 13. Also, the first top zigzag fold line 32 and the second top zigzag fold line 33 are formed so that their folding directions are different from each other. In Example 1, as an example, the first top zigzag fold line 32 is set as a valley fold, and the second top zigzag fold line 33 is set as a mountain fold.

[0028] Also, in FIG. 2A, on the right part 14 constituting the eaves part 4, a fold line of a bellows fold similar to the configuration shown in FIGS. 14 to 16 is formed. On the right part 14, an eaves part parallel fold line 41 is formed on the extensions of a first fold line 22 and a fifth fold line 27 along the second direction. The eaves part parallel fold line 41 extends along the second direction (lateral direction) and is arranged in parallel at intervals in the first direction (longitudinal direction). In Example 1, the eaves part parallel fold line 41 is set as a mountain fold as an example. Further, in the right part 14, a gable part zigzag fold line 42 that is inclined with respect to the gable part parallel fold line 41 is formed. The gable part zigzag fold line 42 intersects the gable part parallel fold line 41 in a zigzag shape. In the first embodiment, the gable part zigzag fold line 42 is set as a valley fold as an example.

[0029] FIG. 4 is an external view of the improved sea cucumber fold element of the first embodiment in a folded state. In the hat 1 of the first embodiment having the above configuration, the side wall part 2 is configured in a form filled with an improved sea cucumber fold element 21 different from the conventional sea cucumber fold. The improved sea cucumber fold element 21 is different from the conventional sea cucumber fold element 03 in that a third fold line 24 is formed, and inside (on the side of the node 25) of the third fold line 24, the folding direction of the fold line is opposite to that outside the third fold line 24, that is, opposite to the conventional sea cucumber fold element 03. Therefore, the pointed part of the node 25 is arranged outwardly in the side wall part 2. Thus, the pointed part of the node 25 does not contact the head of the user wearing the hat 1. Therefore, in the hat 1 of the first embodiment, the discomfort caused by the pointed node 25 contacting the head is suppressed. Further, the improved sea cucumber fold element 21 of the first embodiment has the same first fold line 22 and second fold line 23 as the conventional sea cucumber fold element 03, and when receiving an external force, it can be dispersed in the plane direction of the side wall part 2. Therefore, the hat 1 of the first embodiment also ensures the strength against an external impact. Furthermore, the hat 1 of the first embodiment is manufactured by folding the sheet-like development view 11 along the fold lines 22 to 28, 31 to 33, 41, 42, and can be lightweight while ensuring strength compared to a conventional protective hat or the like composed of a resin mass. For example, a commercially available resin-made disaster prevention helmet weighs about 370 g to 400 g, but the hat described in the first embodiment weighs 182 g when made of paper and can be lightweight to about half the weight.

[0030] Therefore, the hat 1 of Example 1 can also be expected to be used as a bicycle helmet that makes wearing mandatory, and it can be expected to protect the user's head in the event of a fall or accident during bicycle operation. Also, when removing the hat 1 at the destination after moving by bicycle, while a conventional helmet could not be miniaturized, the hat 1 of Example 1 can be miniaturized after being removed (when not in use) and stored in a bag or the like. Furthermore, with conventional helmets, when emphasizing safety, the appearance and design tended to be uniform, but with the hat 1 of Example 1, it is also possible to adopt a form having the visor portion 4, and while realizing various forms of the hat 1 according to the user's preference, head protection can also be expected.

Example

[0031] FIG. 5 is an external view of the hat of Example 2. FIG. 6 is a developed view of the hat of Example 2. FIG. 7 is an explanatory view of the state in which a cover is attached to the hat of Example 2. Next, Example 2 will be described. Example 2 will be described with respect to the differences from Example 1, and the description of the same content as in Example 1 will be omitted. In FIGS. 5 and 6, in the hat 1' of Example 2, compared to the hat 1 of Example 1, there is no top portion 3 or visor portion 4. Therefore, in the hat 1' of Example 2, there are no bellows-folded portions of the top portion 3 or visor portion 4, and it is entirely composed of improved sea cucumber-fold elements 21. In Example 1, the hat 1 was configured by connecting seven developed views 11 shown in FIG. 2A, but in Example 2, the hat 1' is configured by connecting four developed views 11' shown in FIG. 6.

[0032] In FIG. 7, a cover (outer cover) 51 that covers the outer periphery is attached to the hat 1'. By attaching the cover 51, it is possible to change the appearance of the unevenness of the improved sea cucumber fold of the hat 1' to an arbitrary appearance and pattern with the cover 51. The cover 51 is configured to be foldable along the mountain fold line 51a and the valley fold line 51b, so that after removing the hat 1' at the destination, both the hat 1' and the cover 51 can be miniaturized and stored compactly.

[0033] (Function of Example 2) In the hat 1' of Example 2 having the above configuration, as in Example 1, the improved sea cucumber fold element 21 ensures the strength against external impacts while suppressing discomfort. Also, by providing the cover 51, the appearance can be arbitrarily changed according to the user's preference. Note that the cover 51 can also be applied to the hat 1 of Example 1.

Example

[0034] Figure 8 is an external view of the hat of Example 3. Figure 9 is a developed view of the hat of Example 3. Next, Example 3 will be described. Example 3 will be described with respect to the differences from Example 1, and the description of the same content as in Example 1 will be omitted. In FIGS. 8 and 9, in the hat 1″ of Example 3, the position of the first top zigzag fold line 32″ of the left part 12″ corresponding to the top part 3″ is shifted to the outer end side in the developed view of FIG. 9 compared to the case of the hat 1 of Example 1. In Example 1, the hat 1 was formed by connecting seven developed views 11 shown in FIG. 2A, while in Example 3, the hat 1″ is formed by connecting four developed views 11″ shown in FIG. 9.

[0035] (Function of Example 3) In the hat 1″ of Example 3 having the above configuration, by arranging the first top zigzag fold line 32″ as shown in FIG. 9, it is possible to form a hat 1″ having a shape with the top part 3″ pointed upward as shown in FIG. 8. Therefore, by changing the inclination angle, position, and length of the fold lines of the top part 3″ and the brim part 4, hats of arbitrary shapes can be realized. Note that in the hat 1″ of Example 3 as well, as in Examples 1 and 2, the strength against external impacts is ensured while suppressing discomfort.

Example

[0036] Figure 10 is an external view of the hat of Example 4. Figure 11 is a developed view of the hat of Example 4. Next, Example 4 will be described. Example 4 will explain the differences from Example 1, and the explanations for the same content as in Example 1 will be omitted. In FIGS. 10 and 11, in the hat 101 of Example 4, on the left part 112 of the development view 111 corresponding to the top part 103 of the hat 101, a top parallel fold line 131 and a top zigzag fold line 133, which are configured in the same way as the top parallel fold line 31 and the second top zigzag fold line 33 of Example 1, are formed. Also, in the hat 101 of Example 4, the middle part 113 of the development view 111 corresponding to the side wall part 102 is formed in the same way as the middle part 13 of Example 1. Furthermore, in the hat 101 of Example 4, on the right part 114 of the development view 111 corresponding to the brim part 104, in the same way as the brim part 022 of the conventional configuration shown in FIGS. 14 to 16, a brim mountain fold line 141 and a brim valley fold line 142 that extend horizontally are formed alternately at intervals in the vertical direction.

[0037] In FIG. 10, in the hat 101 of Example 4, a string passage port 151 is formed in a part of the side wall part 102. A chin string 152 is provided to penetrate through the string passage port 151. The chin string 152 of Example 4 is, as an example, an endless belt string that contacts the user's chin and goes around the side wall part 102 and the top part 103 of the hat 101. Note that the chin string 152 is not limited to the illustrated form. For example, it is also possible to adopt a form in which both ends of a rubber string having both ends are fixed or sewn to the inner surface of the hat 101 with an adhesive. In addition, it is also possible to use a belt having a buckle that can be connected / disconnected.

[0038] (Function of Example 4) In the hat 101 of Example 4 having the above configuration, it is possible to realize a top part 103 and a brim part 104 with different shapes, designs, and appearances from those of Examples 1 to 3. Note that, like the hats of Examples 1 to 3, the hat 101 of Example 4 also ensures strength against external impacts while suppressing discomfort.

Industrial Applicability

[0039] The hat of the present invention can be used not only when riding a bicycle, but also as a protective hat for protecting the head when taking a walk in a cave or a stalactite cave, in the event of a disaster such as an earthquake, at a construction site or an accident site, etc., and can also be used as a sunshade or a fashionable hat. Also, in the above embodiment, when used as a protective hat, it is also possible to adopt a configuration in which a resin impact absorber such as expanded polystyrene, rubber, or elastomer is arranged on the inner surface side of the hats 1, 1', 1''. Furthermore, it is also possible to provide a "chin strap" for preventing the hats 1, 1', 1'' from falling off on the hats 1, 1', 1''. In addition, in order to improve the tactile sensation (feel on the skin), suppress the dirt on the hats 1, 1', 1'', or reinforce the hats 1, 1', 1'', it is also preferable to provide a cushion or a cover (inner cover) along the head on the inner side of the hat where the head and hair directly contact. Furthermore, when using the hat of the present invention as a helmet, it is particularly preferable that the material of the constituent material conforms to safety standards and tests such as sweat resistance, hair oil resistance, and formaldehyde content.

[0040] Furthermore, in each of the above embodiments, the lengths of the second fold line 23 and the fourth fold line 26 are set to be the same length, but it is not limited thereto. It is also possible to make the lengths of the second fold line 23 and the fourth fold line 26 different. By changing the lengths of the second fold line 23 and the fourth fold line 26, the appearance of the improved sea cucumber fold element 21 after being folded can be changed, and the overall pattern of the side wall portion 2 can also be changed. Also, in the second embodiment, it is also possible to apply an external force to the top of the hat 1' to deform it and make the top flat as in the first and fourth embodiments.

Explanation of reference numerals

[0041] 1, 1', 1'', 101... hats, 3, 3'', 103... tops, 4, 104... visors, 11, 11', 11'', 111... development views, 21... improved sea cucumber fold element, 22... first fold line, 22a... corner of the quadrilateral, 23…The second broken line, 23a…The end portion on the center side of the second broken line, 24…The third broken line, 25…Node, 26…The fourth broken line, 27…The fifth broken line, 28…The sixth broken line, 51…Cover.

Claims

1. A hat formed by folding a developed view in which mountain fold lines and valley fold lines are formed, In the developed view, improved wavy fold elements in a square shape are arranged adjacent to each other in a first direction and a second direction intersecting the first direction, and the improved wavy fold elements adjacent to each other in the second direction are arranged shifted by half an element along the first direction, The improved wavy fold element, Four first fold lines formed along the outer edge of the quadrilateral, Four second fold lines extending from the corners of the quadrilateral toward the nodes on the central side of the quadrilateral and having a folding direction different from that of the first fold lines, Four third fold lines connecting the central-side ends of the four second fold lines and formed inside the first fold lines and having a folding direction different from that of the first fold lines, Four fourth fold lines formed on the extension of the second fold line to connect the second fold line and the node and having a folding direction different from that of the second fold line, A fifth fold line formed on the extension of the first fold line of the adjacent improved wavy fold element adjacent in the second direction, extending toward the node, with the central-side end connected to the third fold line and having the same folding direction as the first fold line, A sixth fold line formed on the extension of the fifth fold line to connect the fifth fold line and the node and having a folding direction different from that of the fifth fold line, having, A hat characterized by this.

2. The hat according to claim 1, characterized in that it is deformable between a folded state folded by each fold line and a developed state in which each fold line is developed.

3. In the developed view, a brim portion arranged at the end in the second direction and forming a brim of the hat in a state of being folded along a fold line, The hat according to claim 1, characterized by comprising this.

4. In the developed view, a top portion arranged at the end in the second direction and forming the top of the hat in a state of being folded along a fold line, The hat according to claim 1, characterized by comprising this.

5. A cover arranged to cover the outer periphery of the improved wavy fold element, The hat according to claim 1, characterized by comprising this.

6. The cover configured to be foldable along a fold line, The hat according to claim 5, characterized by comprising this.

Images