JP2012136821A - Shield member and protective headwear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shield member covering the face of a wearing person and a protective headwear provided with the shield member, effective for avoiding the accident of sliding a flying object on the surface of a shield plate and contacting with the body of the wearing person in the case of hitting the flying object against the shield plate placed at a covering position.SOLUTION: The shield member 5 of a helmet 1 is formed of a transparent or translucent body and curved outward to the direction of a side of the face and curved outward from the upper part of the front of the face toward the lower jaw. The lower end of the shield member 5 is extended forward below and thinned toward both side parts of the face to form a bill 17 which is long at the center part of the face. The bill 17 of the shield member 5 is placed by forming a gap to the lower jaw part of the face.

Description

  The present invention relates to a shield member and a protective cap, and more particularly to a member configured to cover a wearer's face.

  Conventionally, a protective cap (helmet with a shield (transparent or translucent shield plate)) that protects the eyes of workers as a countermeasure against accidents such as nails bouncing back with a nailing machine during building construction of a house ) Is known (for example, see Patent Documents 1 to 3).

JP 2003-049316 A JP 2003-253519 A Japanese Patent Laid-Open No. 2003-082518

  However, the shield plate provided in the conventional protective cap is formed into a curved shape by, for example, heating and deforming a flat plate material made of transparent resin or the like.

  Therefore, the thickness of the shield plate is almost constant regardless of the part of the shield plate, and when the wearer sees an object through the shield plate, the image seen through the central portion of the shield plate is hardly distorted. However, there is a problem that an image viewed through the periphery of the shield plate is distorted.

  In other words, when the wearer wears a protective cap and covers the wearer's face with a shield plate, when the wearer looks at the front (in front), the image seen by the wearer is hardly distorted. However, if the eyeball is moved left and right or up and down to shift the line of sight in the left and right and up and down directions, there is a problem that the image seen by the wearer is distorted.

  The present invention has been made in view of the above problems, and in the shield member that covers the wearer's face and the protective cap in which the shield member is installed, the projectile is also present when the projectile is in the covering position. An object of the present invention is to provide a shield member and a protective cap that can avoid a situation in which the surface of the shield member slides and contacts the wearer's body.

  In the shield member according to the first aspect of the present invention, the shield member provided in the helmet is made of a transparent body or a semi-transparent body, and is curved outward in the direction of the side face of the face. Curved outward from the upper front part toward the lower jaw, the lower end of the shield member projects forward and downward, and narrows toward both sides of the face. The buttocks of the shield member is a shield member provided at a distance from the lower jaw portion of the face.

  The shield member based on the 2nd aspect of this invention is a shield member based on the said 1st aspect, The lower end of the said main-body part is a shield member currently formed in circular arc convex downward.

  The shield member based on the 3rd aspect of this invention is a shield member based on the said 1st aspect or the said 2nd aspect, The shield which the lower end of the said buttocks is located below the said wearer's jaw It is a member.

  The shield member based on the 4th aspect of this invention is the shield member based on any one of the said 1st aspect to the said 3rd aspect, The said wearer side in the center part of the width direction of the said collar part The shield member is provided with a recess that is recessed and opened to the lower end side.

  The shield member according to a fifth aspect of the present invention is the shield member according to any one of the first aspect to the fourth aspect, wherein the buttocks are flying objects that are the jaw and body of the wearer. It is a shield member which prevents contacting with.

  A protective cap according to a sixth aspect of the present invention includes a shield member according to any one of the first aspect to the fifth aspect, a cap body that protects a wearer's head, and the shield member. Guide means for guiding the shield member so that the shield member can move between a storage position in which the cap member is stored and a covering position where the shield member covers the face of the wearer. The protective cap in which a gap is formed between the collar portion of the shield member and the collar portion of the cap body in a state where the shield member is positioned at the storage position.

  According to the present invention, in the shield member that covers the wearer's face and the protective cap in which the shield member is installed, the flying object slips on the surface of the shield member even when the flying object is in the covering position. The effect that the situation which contacts a person's body can be avoided is produced.

It is a perspective view when a wearer wears protective cap 1 concerning a 1st embodiment of the present invention. It is a front view when a wearer wears the protective cap 1. It is a side view when a wearer wears the protective cap 1. 1 is a perspective view when a wearer wears a protective cap 1. FIG. It is a front view when a wearer wears the protective cap 1. It is a side view when a wearer wears the protective cap 1. 1 is a cross-sectional view of a protective cap 1. FIG. It is the figure which looked at the protective cap 1 from the inside. It is a perspective view which shows the state which assembled the guide member 11 and the shield board 5. FIG. It is a perspective view which shows the state which assembled the guide member 11 and the shield board 5. FIG. 3 is a perspective view showing a schematic configuration of a shield plate 5. FIG. 2 is a front view showing a schematic configuration of a shield plate 5. FIG. 3 is a side view showing a schematic configuration of a shield plate 5. FIG. It is a XIV arrow line view in FIG. It is a figure which shows the XV-XV cross section in FIG. It is a figure which shows the XVI-XVI cross section in FIG. 2 is a front view showing a schematic configuration of a guide member 11. FIG. It is a XVIII arrow directional view in FIG. It is a XIX arrow line view in FIG. It is a figure which shows the cross section of the shield board 5, Comprising: It is a figure corresponding to FIG. It is a perspective view when a wearer wears protective cap 201 concerning a 2nd embodiment of the present invention. It is a perspective view when a wearer wears the protective cap 201. 2 is a cross-sectional view of a protective cap 201. FIG. It is the figure which looked at the protective cap 201 from the inside. It is the figure which looked at the protective cap 201 from the inside. It is XXVI-XXVI cross section in FIG. It is a figure which shows the specific structure of the holding means 261. It is a figure which shows schematic structure of the protective cap 301 which concerns on the 3rd Embodiment of this invention. It is a figure which shows the difference in the external shape of the cap body 303 of the protective cap 301, and the cap body 300 of a general purpose protective cap. 3 is a cross-sectional view of a protective cap 301. FIG. It is a figure which shows the state in which the wearer covered the protective cap 301. FIG. 3 is a perspective view showing a schematic configuration of an inner member 321. FIG. It is XXXIII-XXXIII sectional drawing in FIG. It is a figure which shows the modification of the protective cap. It is a figure which shows schematic structure of the protective cap 351 which concerns on the 4th Embodiment of this invention. 3 is a diagram showing a schematic configuration of a protective cap 351. FIG. It is an enlarged view of the X section of FIG. It is a disassembled perspective view which shows schematic structure of the protective cap which concerns on the 5th Embodiment of this invention. It is sectional drawing which shows schematic structure of a protective cap. It is a front view of a protective cap, Comprising: It is a XL arrow view in FIG. It is a bottom view of a protective cap, Comprising: It is a XLI arrow view in FIG. It is a figure which shows the engagement state of a cap body and a guide member, and the engagement state of a cap body, a chin string, and a hammock. It is a figure which shows the assembly of a guide member and a shield board. It is a figure which shows the assembly of a guide member and a shield board. It is a figure which shows the detail of the guide part etc. in a guide member. It is a figure which shows schematic structure of a cap body. It is a figure which shows the side part to-be-engaged part provided in the cap body. It is a figure which shows the center site | part engaged part provided in the cap body. It is a figure which shows a guide member. It is a figure which shows a guide member. It is a figure which shows a guide member latching | locking part. It is a figure which shows a shield board. It is a figure which shows a shield board.

[First Embodiment]
1 and 4 are perspective views when the wearer wears the protective cap 1 according to the first embodiment of the present invention, and FIGS. 2 and 5 show the protective cap 1 worn by the wearer. FIG. 3 and FIG. 6 are side views when the wearer wears the protective cap 1.

  1, 2, and 3 show a state where the shield plate 5 is positioned at the storage position P <b> 1, and FIGS. 4, 5, and 6 illustrate that the shield plate 5 is positioned at the covering position P <b> 3. Indicates the state.

  FIG. 7 is a cross-sectional view of the protective cap 1 by a plane that passes through the center of the protective cap 1 and expands in the front-rear and up-down directions of the protective cap 1, and FIG. FIG. 7B is an enlarged view of a portion B in FIG.

  9 and 10 are perspective views showing a state in which the guide member 11 and the shield plate 5 are assembled. FIG. 9 shows a state where the shield plate 5 is located at the storage position P1, and FIG. 10 shows a state where the shield plate 5 is located at the covering position P3.

  11 is a perspective view showing a schematic configuration of the shield plate 5, FIG. 12 is a front view showing a schematic configuration of the shield plate 5, and FIG. 13 is a side view showing a schematic configuration of the shield plate 5. 14 is a view taken along arrow XIV in FIG. 12, FIG. 15 is a view showing an XV-XV section in FIG. 12, and FIG. 16 is a view showing an XVI-XVI section in FIG.

  17 is a front view showing a schematic configuration of the guide member 11, FIG. 18 is a view taken in the direction of arrow XVIII in FIG. 17, and FIG. 19 is a view taken in the direction of arrow XIX in FIG.

  In the following, each direction in the protective cap (cap body, shield plate, guide member, etc.) is defined as the width direction (left-right direction), the front-rear direction, the up-down direction, The description may be made using the words “below”, “front”, and “back”. Each of the above directions is a direction when a wearer standing upright (upright) wears the protective cap, and each of the three directions is substantially orthogonal to each other.

  A protective cap (helmet with a shield surface) 1 includes, for example, a cap body 3 that is formed substantially symmetrically, a shield plate 5, and guide means 7 that guides the shield plate 5.

  The cap body 3 is for protecting the wearer's head, and is made of, for example, a material such as a resin and formed in a bowl shape (for example, a hemispherical shell shape).

  Here, the hemispherical shell is a shape obtained by removing a second sphere whose center coincides with the first sphere with a radius slightly smaller than the radius of the first sphere from the first sphere having a predetermined radius. Is a solid formed when the solid is divided into two at a plane passing through the center of each sphere or the vicinity thereof.

  The cap body 3 is formed in a “hemispherical shell shape” and is not formed in a complete “hemispherical shell shape”. That is, the cap body 3 is formed in a shape in which the radius of curvature is appropriately changed in order to match the shape of the wearer's head. In addition, the radius of curvature of the cap body 3 is appropriately changed so that the opening (the heel; the lower end) 9 of the cap body 3 is not completely circular but is adapted to the shape of the wearer's head. It is formed in a circular shape.

  Since the cap body 3 is formed in a hemispherical shell shape, when an upright wearer wears the protective cap 1, the opening 9 of the cap body 3 is substantially horizontal, and the opening 9 is It is located slightly above the wearer's ear and the wearer's ear is exposed (see FIGS. 1 to 6). Note that a collar portion 10 is provided on the front side of the opening 9 of the cap body 3.

  The shield plate (face body; shield member) 5 is for protecting almost the entire face of the wearer, and is made of a transparent (including colored transparent) or translucent material such as a resin.

  The guide means 7 is a means for guiding the shield plate 5 when the shield plate 5 moves relative to the cap body 3, and is guided by the guide means 7 so that the shield plate 5 is covered with the storage position P1. An arcuate locus is drawn between the position P3 and the position P3. The storage position P1 is a position where the shield plate 5 is stored inside the front side of the cap body 3, and the covering position P3 is that the shield plate 5 covers almost all of the wearer's face (front of the head). Position. In addition, the wearer's ear is hidden by the shield plate 5 when viewed from the front of the wearer in a state where the wearer standing upright with the protective cap 1 covers the shield position P3 and the shield plate 5 is positioned. To do.

  The shield plate 5 guided by the guide means 7 is not easily separated from the cap body 3 and does not move in the left-right direction of the protective cap 1, so that the protective cap 1 (cap body 3) It moves (rotates) around a predetermined axis C1 extending in the left-right direction (see FIGS. 3, 6, and 7). The predetermined axis C <b> 1 extends in the left-right direction of the cap body 3 (direction perpendicular to the plane of FIG. 3, FIG. 6, and FIG. 7) through the site behind the wearer's ear.

  The guide means 7 includes, for example, a guide portion 13 provided on the guide member 11 and an engagement portion 15 provided on the shield plate 5.

  The guide portion 13 is formed in an arc shape. In a state where the guide member 11 is installed on the cap body 3, the guide portion 13 is integrally provided on the cap body 3 inside the front side of the cap body 3 around the predetermined axis C <b> 1. Moreover, the guide part 13 is provided in the both ends and center part of the width direction of the guide member 11, for example.

  The shield plate 5 is formed in a curved plate shape. Engagement portions 15 that engage with the guide portions 13 are provided, for example, at both end portions and the central portion in the width direction of the shield plate 5. And when the engaging part 15 engages with the guide part 13, the shield plate 5 moves between the storage position P1 and the covering position P3.

  The state where the shield plate 5 is located at the storage position P1 will be described in detail. In this state, the shield plate 5 is not completely accommodated inside the cap body 3, and the lower end portion (庇17 and a portion in the vicinity thereof project downward from the lower end portion (opening portion on the front side of the cap body 3) 9 of the cap body 3. It should be noted that the ridge 17 is reversed at the lower end of the shield plate 5. That is, the heel 17 is bent and extended in the reverse direction (direction away from the wearer's face). Thereby, even when the flying object hits the shield plate (shield plate at the covering position P3) 5, the situation where the flying object slides on the surface of the shield plate 5 and contacts the wearer's body can be avoided.

  In the state where the shield plate 5 is located at the storage position P1, even if the lower end portion of the shield plate 5 or a portion in the vicinity of the shield plate 5 protrudes downward from the lower end portion 9 of the cap body 3, it may interfere with the wearer. In addition, the wearer can wear the protective cap 1 without being aware of the presence of the shield plate 5 in the field of view. The upper end portion of the shield plate 5 is located near the top of the cap body 3. Note that the shield plate 5 may be completely accommodated inside the cap body 3 in a state where the flange 17 of the shield plate 5 is deleted and the shield plate 5 is located at the storage position P1.

  In a state where the shield plate 5 is located at the covering position P3, the lower end portion of the shield plate 5 is located below the wearer's chin, and the shield plate 5 covers almost all of the wearer's face. ing. That is, when viewed from the front, the shield plate 5 covers all of the wearer's face (see FIGS. 4 to 6). Further, the upper end portion of the shield plate 5 is located inside the cap body 3 in the vicinity of the lower end portion of the cap body 3 (the opening 9 on the front side of the cap body 3).

  The guide member 11 is made of, for example, a resin or the like, and is configured integrally with a central portion 19, a first side portion 21, and a second side portion 23. The central portion 19 has a spherical curved surface and is formed in a plate shape (curved plate shape). The first side portion 21 is provided integrally with the central portion 19 on one end side in the width direction of the central portion 19. The second side portion 23 is provided integrally with the central portion 19 on the other end portion side in the width direction of the central portion 19.

  The first side part 21 is composed of a base end part (part on the center part 19 side) 25 and a tip part side part 27, and the second side part 23 is similarly configured as a base end. It is composed of a part side part (part on the central part 19 side) 29 and a tip part side part 31. And a part of guide part 13 is formed in each site | part 25,29.

  Further, the distal end portion 27 of the first lateral portion 21 and the distal end portion 31 of the second lateral portion 23 engage with the cap body 3 (for example, the lower side of the lateral side of the cap body 3). The guide member 11 is provided integrally with the cap body 3 in surface contact with the inner surface.

  The shield plate 5 enters the space formed between the cap body 3 and the central portion 19 and the base end side portions 25 and 29 of the side portions 21 and 23, and is stored inside the cap body 3. It has become so.

  The tip side portion 27 of the first side portion 21 is formed in a plate shape (curved plate shape) having a curved surface in surface contact with the lower inner surface on one side of the cap body 3. Similarly, the distal end portion side portion 31 of the second side portion 23 is formed in a plate shape (curved plate shape) having a curved surface in surface contact with the lower inner surface on the other side of the cap body 3. .

  The proximal end portion side portion 25 of the first side portion 21 includes an upright portion 33 and a connecting portion 35. The standing portion 33 is formed in a long and narrow plate shape, and stands upright obliquely in the intersecting direction from the distal end portion side portion 27 of the first side portion 21 so that the width direction becomes the standing direction. The connecting portion 35 is formed in an elongated plate shape, and one end portion in the width direction is provided integrally with the central portion 19, and the other end portion in the width direction is provided integrally with the standing portion 33. 33 and the central part 19 are connected.

  In the state where the guide member 11 is provided integrally with the cap body 3, the standing portion 33 rises obliquely forward from the inner surface of the cap body 3 (inward direction of the cap body 3), and the connection portion 35 (connection portion). Each surface 35 in the thickness direction of 35 is developed substantially in the front-rear and up-down directions of the protective cap 1.

  Similarly, the base end portion side portion 29 of the second side portion 23 is composed of a standing portion 41 and a connecting portion 43.

  The guide portion 13 of the guide member 11 is guided by a circular arc-shaped long hole 39 formed in the connecting portion 35, a circular arc-shaped long hole 47 formed in the connecting portion 43, and a central portion in the width direction of the guide member 11. It is comprised by the to-be-engaged part 63 (groove 65; the center part of the center site | part 19) formed extending in the up-down direction of the member 11.

  The engagement portion 15 of the shield plate 5 is configured by engagement pieces 51 and 59 provided at both end portions in the width direction of the shield plate 5 and protrusions 37 provided on the shield plate 5.

  As shown in FIGS. 8, 9, 10, and 26, the engagement piece 51 protrudes inward of the shield plate 5 at the upper end portion on one end side in the width direction of the shield plate 5 and is integrated with the shield plate 5. Provided. The engagement piece 51 is formed in an umbrella shape including a columnar base end portion 53 and an umbrella portion 55 formed in a disk shape having a larger outer diameter than the base end portion 53. The engagement piece 51 has a base end portion 53 having an outer diameter slightly smaller than the width of the long hole 39 in the long hole 39 provided in the base end side portion 25 of the guide member 11, so It is engaged. The outer diameter of the umbrella portion 55 is larger than the width of the long hole 39. Similarly, an engagement piece 59 is provided on the other side in the width direction of the shield plate 5, and the engagement piece 59 is engaged with the long hole 47.

  As shown in FIGS. 12 to 14, the projection 37 protrudes inward (concave surface) of the shield plate 5 at the center portion in the width direction of the shield plate 5 and at the upper end portion side in the vertical direction of the shield plate 5. It is provided integrally with the plate 5.

  Sites 67 and 69 penetrating the guide member 11 are formed at both ends in the longitudinal direction of the groove 65. An elongated plate-shaped guide recess 70 that is recessed inside the guide member 11 is formed in the middle portion of the groove 65 in the longitudinal direction. Then, the engagement piece 51 is engaged with the long hole 39, the engagement piece 59 is engaged with the long hole 47, and the tip portion of the projection 37 is engaged with the guide recess 70 in a sliding pair, The shield plate 5 is guided and moved.

  When the guide member 11 is installed inside the cap body 3, as shown in FIG. 7, the front side of the protective cap 1 has a double structure in which the cap body 3 is located outside and the guide member 11 is located inside, A shield plate 5 is inserted between the cap body 3 and the guide member 11.

  When the guide member 11 is installed in the cap body 3, the center of the arc-shaped elongated hole 39 (47) of the connecting portion 35 (43) coincides with a predetermined axis C1 (see FIGS. 3, 6, and 7). . Therefore, the shield plate 5 rotates about the predetermined axis C1.

  Further, the cross section (the cross section shown in FIG. 7) of the central portion 19 of the guide member 11 is formed in an arc shape whose center is a predetermined axis C1. Further, the cross section of the shield plate 5 (the cross section shown in FIG. 7) is formed in an arc shape centered on a predetermined axis C3. The predetermined axis C3 extends in parallel to the predetermined axis C1, and is positioned slightly above and behind the predetermined axis C1.

  The radius of curvature of the central portion 19 of the guide member 11 is larger than the radius of curvature of the long hole 39 (47), and the radius of curvature of the central portion 19 of the guide member 11 and the radius of curvature of the shield plate 5 are different from each other. It is almost equal.

  In the cross section shown in FIG. 7, when the shield plate 5 is located at the storage position P <b> 1, the upper end portion of the central portion 19 of the guide member 11 and the upper end portion of the shield plate 5 are in the vertical direction of the cap body 3. Is positioned above the cap body 3, and is positioned at the center of the cap body 3 in the front-rear direction of the cap body 3. Further, the lower end portion of the central portion 19 of the guide member 11 and the lower end portion of the shield plate 5 are located near the front lower end portion of the cap body 3.

  The protective cap 1 is provided with holding means 61 for holding the shield plate 5. The holding means 61 is means for holding the shield plate 5 so that the shield plate 5 does not easily move with respect to the cap body 3 when the shield plate 5 is located at the storage position P1 or the covering position P3. .

  The holding means 61 includes, for example, a projection 37 provided on the shield plate 5 and an engaged portion 63 provided on the guide member 11. The engaged portion 63 includes a groove 65 formed to extend in the vertical direction of the guide member 11 at the center in the width direction of the guide member 11.

  A portion 67 on one end (upper end) side in the longitudinal direction of the guide groove 65 is formed to have a width B1 narrower than the central portion, and a portion 69 on the other end (lower end) side in the longitudinal direction of the guide groove 65. Similarly, it is formed to have a narrow width B1. Further, the outer diameter D1 of the columnar projection 37 provided on the shield plate 5 is formed to be slightly larger than the width B1.

  When the shield plate 5 is located at the storage position P1, the projection 37 enters the portion 67 on the upper end side so that the shield plate 5 does not move easily. When the shield plate 5 is located at the covering position P3, the protrusion 37 enters the portion 69 on the lower end side so that the shield plate 5 does not move easily.

  By the way, the protective cap 1 is provided with an interior body (for example, a hammock) (not shown), and the cap body 3 and the guide member 11 are provided with a plurality of locking portions 71 for locking the hammock. . Each locking portion 71 </ b> A located on the rear side among the locking portions 71 is integrally provided on the inner surface of the cap body 3, and located on the front side among the locking portions 71. Each locking portion 71 </ b> B is integrally provided on the inner surface of the guide member 11.

  Here, the shield plate 5 will be described in more detail.

  As described above, the shield plate 5 is installed on the cap body 3 that protects the wearer's head and covers, for example, almost all of the wearer's face, and is a plate curved with a transparent or translucent body. It is formed in a shape.

  The shield plate 5 is formed in a curved plate shape having a concave shape on one side in the thickness direction and a convex shape on the other side in the thickness direction. The thickness gradually decreases from the central part toward the peripheral part (see FIGS. 15 and 16). The shield plate 5 is made of a resin such as acrylic or polycarbonate, and is formed by injection molding. Further, the shield plate 5 is formed with a thickness of about 1.6 mm to 2.0 mm in accordance with ANSI standards, so that it does not break even when subjected to a high-speed impact test.

  Since the shield plate 5 is formed in a curved plate shape, the inner surface (one surface in the thickness direction) of the shield plate 5 on the face side of the wearer is formed in a concave shape, and the thickness direction The other surface of the outer surface is formed in a convex shape. Further, the shield plate 5 is formed so that the curvature radius in the left-right direction is smaller than the curvature radius in the vertical direction, and the rate of change in thickness in the left-right direction is larger than the rate of change in thickness in the vertical direction. (See FIGS. 15 and 16). Note that the center of the arc in the vertical direction of the shield plate coincides with the axis C3. On the other hand, the center of the arc in the left-right direction of the shield plate 5 substantially coincides with an axis passing through the center of the opening 9 of the cap body 3, for example.

  Furthermore, the shield plate 5 includes a main body portion 73 and a flange portion 17, and the main body portion 73 is formed in a curved plate shape as described above. The convex surface (concave surface) of the main body portion 73 of the shield plate 5 is formed in a predetermined shape that approximates a predetermined tertiary curved surface. The predetermined cubic curved surface includes a barrel-shaped three-dimensional side surface that is a columnar shape in which a central portion in the axial direction swells, a first plane including the axis, and the first plane including the axis. And a third curved surface obtained by cutting at a second plane intersecting at a predetermined angle.

  In addition, as shown in FIG. 12, the upper end and the both ends of the left-right direction of the main-body part 73 of the shield board 5 are formed linearly when seen from the front, The lower end of the main-body part 73 of the shield board 5 is It is formed in a downwardly convex arc shape.

  As described above, the flange portion 17 is bent and protrudes on the opposite side of the main body portion 73 below the main body portion 73.

  More specifically, as shown in FIG. 12, the flange portion 17 is formed in a plate shape with a crescent shape when viewed from the front, and a portion formed in a concave shape with a crescent shape is the main body of the shield plate 5. It is connected to the lower end of the portion 73, protrudes downward from the lower end of the main body portion 73 and is integrated with the main body portion 73. Further, as shown in FIG. 13 (FIG. 6), when the erect wearer wears the cap body 3 and covers the face of the wearer with the shield plate 5, the heel portion 17 has the upper end (the body portion 73 side). It protrudes in a direction (front) away from the wearer's face as it goes from the end of the wearer toward the lower end.

  Moreover, the recessed part 75 dented by the predetermined width is formed in the inner side (rear side; wearer's face side) of the main-body part 73 in the center part of the width direction of the collar part 17. As shown in FIG.

  Here, the operation | movement which wears the protective cap 1 and makes the shield board 5 enter / exit is demonstrated.

  First, the wearer wears the protective cap 1 in a state where the shield plate 5 is located at the storage position P1. When it is necessary to operate the shield plate 5 at the covering position P3, if the lower end portion (for example, the flange portion 17) of the shield plate 5 is pulled downward to move the shield plate 5 downward, the protrusion 37 enters the portion 69 on the lower end side of the guide groove 65, the shield plate 5 is located at the covering position P3, and the shield plate 5 is not easily moved from the covering position P3.

  On the other hand, when the shield plate 5 positioned at the covering position P3 is positioned at the storage position P1, when the shield plate 5 is pushed up and moved upward, the projection 37 is located on the upper end portion portion 67 of the guide groove 65. The shield plate 5 is positioned at the storage position P1, and the shield plate 5 is not easily moved from the storage position P1.

  According to the protective cap 1, since the shield plate 5 has a structure in which the thickness gradually decreases from the central portion toward the peripheral portion, the wearer viewed the front through the shield plate 5. The difference between the optical path length in the case (optical path length in the shield plate) and the optical path length (optical path length in the shield plate) when the wearer sees the periphery through the shield plate 5 can be reduced. Even when the wearer sees through the periphery of the shield plate 5, the distortion of the image can be reduced as much as possible.

  That is, as shown in FIG. 20 (a diagram showing a cross section of the shield plate 5 and corresponding to FIG. 16), the difference between the optical path length L11 and the optical path length L21 in the shield plate 5 is small, and the optical path length is reduced. Since the difference between L11 and the optical path length L31 is small, image distortion can be minimized.

  Here, the reference symbol F0 shown in FIG. 20 indicates the outer surface (convex surface) of the shield plate 5 according to this embodiment, and the reference symbol F1 indicates the inner surface of the shield plate 5 according to this embodiment ( (Concave surface). Thereby, the thickness of the shield plate 5 according to this embodiment is gradually reduced from the central portion toward the peripheral portion. On the other hand, the reference symbol F0 indicates the outer surface of the conventional shield plate, and the reference symbol F2 indicates the inner surface of the conventional shield plate, whereby the thickness of the conventional shield plate is constant. It has become.

  Reference symbol R1 indicates the optical path of light entering the wearer's eye EY from the front, and reference symbols R2 and R2a indicate the optical path of light entering the wearer's eye EY from the side surface (peripheral portion of the shield plate). The reference numerals R3 and R3a indicate the optical path of light entering the wearer's eyes EY from the further side.

  Light path length (light path length in the shield plate 5 according to this embodiment) L11 and light path length (light path length in the conventional shield plate) L12 of the light (light of the light path R1) entering the wearer's eyes EY from the front Are equal to each other.

  On the other hand, since the refractive index of the shield plate is larger than the refractive index of air, according to Snell's law, the optical path length of the light entering the wearer's eyes EY from the side surface (light of the optical paths R2, R2a) in the shield plate (conventional) The optical path length (the optical path length in the shield plate 5 according to this embodiment) L21 is shorter than the optical path length L22 in the shield plate, and the length of the optical path length L21 is substantially equal to the length of the optical path length L11. It has become. Similarly, the optical path length L31 is shorter than the optical path length L32, and the length of the optical path length L31 is substantially equal to the length of the optical path length L11. As a result, image distortion can be minimized.

  Moreover, according to the protective cap 1, the curvature radius in the left-right direction of the shield plate 5 is formed smaller than the curvature radius in the up-down direction, and the rate of change in thickness in the left-right direction is the change in thickness in the up-down direction. Therefore, the distortion of the image when the wearer sees through the peripheral part of the shield plate 5 can be reduced as much as possible in accordance with the face form of the wearer.

  That is, since the curvature radius in the vertical direction of the shield plate 5 is formed larger than the curvature radius in the left-right direction, the wearer's face can be covered in conformity with the shape of the wearer's face. Further, since the curvature radius in the vertical direction of the shield plate 5 is larger than the curvature radius in the horizontal direction, the rate of change in thickness in the vertical direction of the shield plate 5 is smaller than the rate of change in thickness in the horizontal direction. Therefore, the distortion of the image is reduced as much as possible.

  Further, according to the protective cap 1, the flange portion 17 of the shield plate 5 protrudes by bending to the opposite side (reverse direction; direction away from the wearer's face) from the main body portion 73 below the main body portion 73. As described above, even when the flying object hits the shield plate 5, it is possible to avoid a situation where the flying object slides on the surface of the shield plate 5 and contacts the wearer's body.

  That is, as shown by an arrow A6 in FIG. 6, when a projectile flying from diagonally above collides at a shallow angle below the shield plate 5, the projectile that bounces and bounces back to the wearer's chest and abdomen. There is a risk of reaching. In FIG. 6, since the wearer is facing the horizontal direction, the above-mentioned fear is small. However, when the wearer is working while facing upward, the projectile that bounces off and collides is The risk of reaching the wearer's chest and abdomen increases. However, since the collar part 17 is provided, the flying object that bounces off after colliding with the collar part 17 collides with the collar part 17 and falls to a place away from the wearer, and reaches the wearer's body. You can avoid the situation.

  Further, according to the protective cap 1, the recess 75 is provided, so that the wearer of the protective cap 1 can easily operate the shield plate 5.

  That is, for example, in a state where the shield plate 5 exists at the storage position P1, the recess portion 75 is provided in the flange portion 17 of the shield plate 5, so that the flange portion 17 of the shield plate 5 and the flange portion of the cap body 3 are provided. 10 is formed with a gap through which the wearer can put his finger. When the shield plate 5 existing in the storage position P1 is positioned at the covering position P3, the wearer puts a finger in the gap and easily moves the shield plate 5 downward to be positioned at the covering position P3. Can do.

  Further, according to the protective cap 1, the shield plate 5 is always installed on the cap body 3, and the shield plate 5 is moved about the predetermined axis C1 by the guide means 7 so as to move. Therefore, it is possible to prevent forgetting to attach the shield plate 5 and to increase the moving stroke of the shield plate 5 while maintaining the conventional shape without enlarging the cap body 3. And even if the length (height) of the shield plate 5 is a length that can cover almost all of the wearer's face, the shield plate 5 is placed on the cap body 3 so as not to obstruct the wearer. Can fit almost inside.

  Further, since the cap body 3 is formed in a hemispherical shell shape that is a shape from which a portion covering the ear part of the wearer is removed, the protective cap 1 is reduced in size and the mass is reduced, and the wearer is informed. A feeling of release can be given.

  Moreover, according to the protective cap 1, since the shield plate 5 is guided by the arc-shaped guide portion 13 and moves along an arc-shaped locus, the movement stroke of the shield plate 5 can be further increased, and the wearer Even if the shield plate 5 having a length that can cover almost all of the face of the body is adopted, it is easier to fit the shield plate 5 inside the cap body 3 so as not to obstruct the wearer. .

  Moreover, according to the protective cap 1, since the arc-shaped guide part 13 is formed in the circular arc shape centering on the predetermined axis | shaft C1, and is provided in the inside of the cap body 3, it can cover a wearer's ear. A hemispherical cap body 3 having no hemisphere can be employed. That is, if the shield plate 5 is configured to be supported by the cap body at the predetermined axis C1, the rotation shaft that supports the shield plate 5 (the rotation shaft that is positioned at the axis C1 of the shield plate 5) is provided. It is necessary to provide the cap body 3 separately, so that it is necessary to provide the cap body 3 with an ear (a part covering the wearer's ear) and the like, and the cap 3 cannot be formed into a hemispherical shell. . However, the protective cap 1 can make the shape of the cap body 3 into a hemispherical shell without providing the cap body 3 with an ear.

  Further, according to the protective cap 1, the guide member 11 is integrally formed and is provided integrally in contact with the cap body 3 at two positions in the left-right direction of the cap body 3. The rigidity of itself and the attachment rigidity when the guide member 11 is attached to the cap body 3 are high.

  Moreover, the latching | locking part 71B which latches the hammock which comprises an interior body can be provided inside the center site | part 19 of the guide member 11 avoiding interference with the guide part 13 and the shield board 5. FIG.

  In addition, you may employ | adopt the half type thing which covers only the upper half of a wearer's face as a shield board.

[Second Embodiment]
21 and 22 are perspective views when the wearer wears the protective cap 201 according to the second embodiment of the present invention, and FIG. 23 is a cross-sectional view of the protective cap 201. FIG. 25 is a view of the protective cap 201 as viewed from the inside.

  21 and 24 show a state where the shield plate 205 is positioned at the storage position P201, and FIGS. 22 and 25 show a state where the shield plate 205 is positioned at the covering position P203. FIG. 23 is a cross-sectional view taken along a plane that extends through the center of the protective cap 201 in the front-rear and vertical directions.

  The protective cap (helmet with shield surface) 201 includes, for example, a cap body 203 that is formed substantially symmetrically, a shield plate 205, and guide means 207 that guides the shield plate 205.

  The cap body 203 is for protecting the wearer's head, and is made of, for example, a material such as a resin and formed in a bowl shape (for example, a hemispherical shell shape).

  Similar to the cap body 3, the cap body 203 is formed in a “hemispherical shell shape”, and is not formed in a complete “hemispherical shell” shape. That is, the cap body 203 is formed in a shape in which the radius of curvature is appropriately changed so as to match the shape of the wearer's head. In addition, the opening (淵; lower end) 209 of the cap body 203 is not a perfect circle, but is formed in a circular shape with a curvature radius appropriately changed so as to match the shape of the wearer's head. ing.

  Since the cap body 203 is formed in a hemispherical shell shape, the outer surface and the inner surface of the cap body 203 have a smooth spherical shape without a sharp bend. Further, since the cap body 203 is formed in a hemispherical shell shape, when an upright wearer wears the protective cap 201, the opening 209 of the cap body 203 is substantially horizontal, and the opening 209 is located slightly above the wearer's ear, and the wearer's ear is exposed (see FIGS. 21 and 22).

  The shield plate (face body; shield member) 205 is formed, for example, in the same manner as the shield plate 5 according to the first embodiment, and protects almost all of the wearer's face, such as a resin. Transparent (including colored transparent) or translucent material.

  The guide unit 207 is a unit that guides the shield plate 205 when the shield plate 205 moves relative to the cap body 203 in the same manner as the guide unit 7. 205 draws an arc-shaped trajectory along a curved surface inside the cap body 203 (an internal curved surface on the front side of the cap body 203 formed in a concave spherical shape) between the storage position P201 and the covering position P203. It is supposed to move. The storage position P201 positioned on the upper side is a position where the shield plate 205 is stored inside the front side of the cap body 203, and the cover position P203 positioned on the lower side is the shield plate 205 where the shield plate 205 It is a position that covers almost all of the face (front of the head).

  The shield plate 205 guided by the guide means 207 is not easily separated from the cap body 203, and does not move in the left-right direction of the protective cap 201, so that the protective cap 201 (cap body 203) It moves (rotates) around a predetermined axis C201 (see FIG. 23) extending in the left-right direction. The predetermined axis C201 extends through the left and right ears of the wearer in the left-right direction of the cap body 203 (direction perpendicular to the paper surface of FIG. 203).

  The guide unit 207 includes, for example, a guide part 213 provided on the guide member 211 and an engagement part 215 provided on the shield plate 205.

  The guide portion 213 is formed in an arc shape (a shape close to an arc instead of a complete arc), and the guide portion 213 extends along the front inner surface of the cap body 203 (for example, substantially parallel). ), The guide member 211 is provided integrally with the cap body 203 inside the front side of the cap body 203. The guide part 213 is provided at both ends of the guide member 211 in the width direction, for example.

  The shield plate 205 has a plate shape (curved plate shape) having a spherical curved surface along the front inner surface of the cap body 203 (for example, a curved surface having a slightly smaller radius of curvature than the front surface of the cap body 203). Is formed. Engaging portions 215 that engage with the guide portions 213 are provided at both ends of the shield plate 205 in the width direction. Then, when the engaging portion 215 is engaged with the guide portion 213, the shield plate 205 is moved between the storage position P201 and the covering position P203.

  The state in which the shield plate 205 is located at the storage position P201 will be described in detail. In this state, the shield plate 205 is not completely accommodated in the cap body 203, and the lower end portion (庇The lower end portion provided with 217) and a portion in the vicinity thereof protrude downward from the lower end portion (opening portion on the front side of the cap body 203) 209 of the cap body 203. It should be noted that the heel (ridge) 217 is inverted at the lower end of the shield plate 205 in the same manner as in the first embodiment. That is, the collar 217 extends in a reverse direction (a direction away from the wearer's face). Thereby, even when the flying object hits the shield plate (shield plate at the covering position P203) 205, it is possible to avoid a situation where the flying object slides on the surface of the shield plate 205 and contacts the wearer's body. As in the case of the first embodiment, the concave portion 75 may be provided in the central portion of the shield plate 205 in the width direction.

  Even when the lower end portion of the shield plate 205 and a portion in the vicinity thereof protrude downward from the lower end portion 209 of the cap body 203 in a state where the shield plate 205 is located at the storage position P201, the wearer is not disturbed. The wearer can wear the protective cap 201 without being aware of the presence of the shield plate 205 in the field of view. The upper end portion of the shield plate 205 is located near the top of the cap body 203. The shield plate 205 may be completely accommodated inside the cap body 203 in a state where the flange 217 of the shield plate 205 is deleted and the shield plate 205 is positioned at the storage position P201.

  In a state where the shield plate 205 is located at the covering position P203, the lower end portion of the shield plate 205 is positioned below the wearer's chin, and the shield plate 205 covers almost all of the wearer's face. ing. That is, when viewed from the front, the shield plate 205 covers the entire face of the wearer. The upper end portion of the shield plate 205 is located inside the cap body 203 in the vicinity of the lower end portion of the cap body 203 (the opening 209 on the front side of the cap body 203).

  The guide member 211 is made of, for example, a resin, and includes a central part 219, a first side part 221 and a second side part 223, and is integrally formed. The central part 219 is a spherical curved surface (for example, a curved surface having a slightly smaller radius of curvature than the shield plate 205) along the front inner surface of the cap body 203 (the inner curved surface of the cap body 203 formed in a concave spherical shape). Are formed in a plate shape (curved plate shape). The first side part 221 is provided integrally with the central part 219 on one end side in the width direction of the central part 219. The second side part 223 is provided integrally with the central part 219 on the other end side in the width direction of the central part 219.

  The first side part 221 is composed of a base part side part (part on the center part 219 side) 225 and a tip part side part 227. Similarly, the second side part 223 is also a base end. It is composed of a part side part (part on the center part 219 side) 229 and a tip part side part 231. And the guide part 213 is formed in each site | part 225,229.

  Further, the distal end portion 227 of the first lateral portion 221 and the distal end portion 231 of the second lateral portion 223 engage with the cap body 203 (for example, the lower side of the lateral side of the cap body 203). The guide member 211 is provided integrally with the cap body 203 in surface contact with the inner surface.

  The shield plate 205 enters the space formed between the cap body 203 and the central portion 219 and the base end side portions 225 and 229 of the side portions 221 and 223, and is stored inside the cap body 203. It has become so.

  The tip side portion 227 of the first side portion 221 is formed in a plate shape (curved plate shape) having a curved surface in surface contact with the lower inner surface on one side of the cap body 203. Similarly, the distal end side portion 231 of the second side portion 223 is formed in a plate shape (curved plate shape) having a curved surface in surface contact with the lower inner surface on the other side of the cap body 203. .

  The proximal end side portion 225 of the first side portion 221 is configured to include an upright portion 233 and a connecting portion 235. The standing part 233 is formed in an elongated plate shape, and stands up in, for example, a substantially orthogonal direction from the tip part side part 227 of the first side part 221 so that the width direction becomes the standing direction. . The connecting portion 235 is formed in an elongated plate shape, and one end portion in the width direction is provided integrally with the central portion 219, and the other end portion in the width direction is provided integrally with the standing portion 233. 233 and the central portion 219 are connected.

  In a state where the guide member 211 is provided integrally with the cap body 203, the standing part 233 rises in a direction orthogonal to the inner surface of the cap body 203 (inward direction of the cap body 203), and the connection part 235 (the connection part 235). The respective surfaces in the thickness direction of the protective cap 201 are developed substantially in the front-rear and up-down directions.

  Similarly, the base end portion side portion 229 of the second side portion 223 includes an upright portion 241 and a connecting portion 243.

  The guide portion 213 includes one curved surface in the thickness direction of the standing portion 233 (an arcuate curved surface positioned on the front side when the guide member 211 is installed on the cap body 203) 237, and a connecting portion 235. The formed arc-shaped elongated hole 239 and one curved surface in the thickness direction of the upright portion 241 (a convex arc-shaped curved surface positioned on the front side when the guide member 211 is installed on the cap body 203) 245 And an arc-shaped long hole 247 formed in the connecting portion 243.

  The engaging portion 215 of the shield plate 205 includes end faces 249 and 257 in the width direction of the shield plate 205 and engaging pieces 251 and 259. The end surface 249 is one end surface in the width direction of the shield plate 205 and is formed in a concave arc shape having a curvature radius substantially equal to the curved surface 237 of the standing portion 233 and is in line contact with the curved surface 237 (more precisely, Surface contact) and engaged in a slipping pair. The end surface 257 is the other end surface in the width direction of the shield plate 205, is configured in the same manner as the end surface 249, and is engaged with the curved surface 245 of the standing part 241.

  Further, as shown in FIG. 26 (XXVI-XXVI cross section in FIG. 23), the engagement piece 251 protrudes inside the shield plate 205 at the upper end portion on one end side in the width direction of the shield plate 205, and Are integrally provided. The engagement piece 251 is formed in an umbrella shape including a columnar base end portion 253 and an umbrella portion 255 formed in a disk shape having a larger outer diameter than the base end portion 253. The engagement piece 251 has a base end 253 having an outer diameter slightly smaller than the width of the long hole 239 in the long hole 239 provided in the base end side portion 225 of the guide member 211, so It is engaged. Note that the outer diameter of the umbrella portion 255 is larger than the width of the long hole 239. Similarly, an engagement piece 259 is provided on the other side in the width direction of the shield plate 205, and the engagement piece 259 is engaged with the long hole 247.

  When the guide member 211 is installed inside the cap body 203, as shown in FIG. 23, the front side of the protective cap 201 has a double structure in which the cap body 203 is located outside and the guide member 211 is located inside, A shield plate 205 is inserted between the cap body 203 and the guide member 211.

  When the guide member 211 is installed on the cap body 203, the center of the arcuate curved surface 237 (245) of the standing part 233 (241) and the center of the arcuate slot 239 (247) of the connecting part 235 (243) They are almost coincident and their centers are located at the wearer's ears. Therefore, the shield plate 205 rotates about the axis C201 (see FIG. 23) extending in the left-right direction of the protective cap through the ear part of the wearer. However, it is not drawn and rotated with a complete arc locus, but is rotated with an arcuate locus close to the arc.

  In addition, the curved surface 237 (245) of the standing portion 233 (241) is located closer to the rotation center axis C201 (inner side) than the long hole 239 (247) of the connecting portion 235 (243), and the connecting portion 235 ( The radius of curvature of the long hole 239 (247) of 243) is larger than the radius of curvature of the curved surface of the standing part 233 (241).

  Further, the cross section of the central portion 219 of the guide member 211 (cross section shown in FIG. 23), the cross section of the shield plate 205 (cross section shown in FIG. 23), and the cross section of the front side portion of the cap body 203 (cross section shown in FIG. 23) It is formed in an arc shape with the moving center axis C201 as the center. The central portion 219 of the guide member 211 is located outside the elongated hole 239 (247) of the connecting portion 235 (243), and the shield plate 205 is located outside the central portion 219 of the guide member 211. The front side portion of the cap body 203 is located outside the shield plate 205.

  The radius of curvature of the central portion 219 of the guide member 211 is larger than the radius of curvature of the long hole 239 (247), and the radius of curvature of the shield plate 205 is larger than the radius of curvature of the central portion 219 of the guide member 211. The radius of curvature of the front portion of the cap body 203 is larger than the radius of curvature of the shield plate 205.

  In the cross section shown in FIG. 23, when the shield plate 205 is located at the storage position P201, the upper end of the curved surface of the standing part 233 (241), the upper end of the long hole 239 (247), and the guide member 211. The upper end portion of the central portion 219 and the upper end portion of the shield plate 205 are positioned above the cap body 203 in the vertical direction of the cap body 203, and the central portion of the cap body 203 in the front-back direction of the cap body 203 Is located. In addition, the lower end portion of the curved surface 237 (245) of the standing portion 233 (241), the lower end portion of the long hole 239 (247), the lower end portion of the central portion 219 of the guide member 211, and the lower end portion of the shield plate 205 The cap body 203 is positioned near the front lower end.

  The protective cap 201 is provided with a holding means 261 that holds the shield plate 205. The holding means 261 is a means for holding the shield plate 205 so that the shield plate 205 does not easily move with respect to the cap body 203 when the shield plate 205 is located at the storage position P201 or the covering position P203. .

  The holding means 261 includes, for example, notches 263 and 265 as shown in FIG. The notch 263 is connected to the long hole 239 (247) at the upper end portion of the long hole 239 (247) and is provided above the long hole 239 (247). The notch 265 is connected to the long hole 239 (247) at the lower end of the long hole 239 (247) and is provided toward the front of the long hole 239 (247).

  When the shield plate 205 is positioned at the storage position P201, the base end portion 253 of the engagement piece 251 (259) enters the notch 263 so that the shield plate 205 does not move easily. . When the shield plate 205 is positioned at the covering position P203, the base end portion 253 of the engagement piece 251 (259) enters the notch 265 so that the shield plate 205 does not move easily. .

  Further, the protective cap 201 has a stopper for preventing the central portion in the width direction of the shield plate 205 from moving downward more than necessary when the shield plate 205 moves downward to be positioned at the covering position P203. Is provided. The stopper includes a protrusion 267 formed on the shield plate 205 and a protrusion 269 provided on the central portion 219 of the guide member 211.

  By the way, the protective cap 201 is provided with an unillustrated interior body (for example, a hammock), and the cap body 203 and the guide member 211 are provided with a plurality of locking portions 271 for locking the hammock. Each locking portion 271 </ b> A located on the rear side among the locking portions 271 is integrally provided on the inner surface of the cap body 203, and located on the front side among the locking portions 271. Each locking portion 271 </ b> B is integrally provided on the inner surface of the guide member 211.

  Further, in the present embodiment (second embodiment), as the shield plate 5 according to the first embodiment, the thickness of the shield plate 205 gradually decreases from the central portion toward the peripheral portion. It may be.

  Here, the operation | movement which wears the protective cap 201 and makes the shield board 205 in and out is demonstrated.

  First, the wearer wears the protective cap 201 in a state where the shield plate 205 is located at the storage position P201. When it is necessary to operate the shield plate 205 at the covering position P203, the engagement piece 251 (259) is cut by pushing the lower end portion (for example, the flange 217) of the shield plate 205 slightly forward. The shield plate 205 can move out of the notch 263. In this state, when the shield plate 205 is moved downward along the long hole 239 (247) or the like, the engagement piece 251 (259) enters the notch 265, and the shield plate 205 is positioned at the covering position P203. The shield plate 205 does not easily move from the covering position P203.

  On the other hand, when the shield plate 205 positioned at the covering position P203 is positioned at the storage position P201, when the lower end portion (for example, the flange 217) of the shield plate 205 is pushed slightly forward, the engagement piece 251 (259) ) Comes out of the notch 265, and the shield plate 205 becomes movable. In this state, when the shield plate 205 is moved upward along the long hole 239 (247) or the like, the engagement piece 251 (259) enters the notch 265, and the shield plate 205 is positioned at the covering position P203. .

  According to the protective cap 201, the shield plate 205 is always installed on the cap body 203, and the shield plate 205 is moved along the curved surface of the cap body 203 by the guide means 207. Forgetting to attach the plate 205 can be prevented, and the moving stroke of the shield plate 205 can be lengthened while maintaining the conventional shape without enlarging the cap body 203. And even if the length (height) of the shield plate 205 is a length that can cover almost all of the wearer's face, the shield plate 205 is placed on the cap body 203 so as not to obstruct the wearer. Can fit almost inside.

  Further, since the cap body 203 is formed in a hemispherical shell shape in which a portion covering the ear portion of the wearer is removed, the protective cap 201 is miniaturized to reduce the mass and to the wearer. In addition, the outer surface (convex side) and the inner surface (concave surface) of the cap body 203 are smoothly bent, and the cap body 203 has high rigidity.

  Further, according to the protective cap 201, the shield plate 205 formed in a plate shape with a curved surface along the front inner surface of the cap body 203 is guided by the arc-shaped guide portion 213 and moves along an arc-shaped locus. Therefore, the movement stroke of the shield plate 205 can be further increased, and even if the shield plate 205 having a length that can cover almost all the face of the wearer is employed, the wearer is not disturbed. In addition, it becomes easier to place the shield plate 205 almost inside the cap body 203.

  Further, according to the protective cap 201, the arcuate guide portion 213 is provided inside the cap body 203 along the front inner surface of the cap body 203, so that it does not cover the wearer's ear. A shaped cap body 203 can be employed. That is, when the shield plate 205 is configured to be supported by the cap body at the rotation center C201, the rotation shaft that supports the shield plate 205 (the rotation positioned at the rotation center C201 of the shield plate 205). Shaft) must be provided separately on the cap body 203, which requires the cap body 203 to be provided at the ear (the part covering the wearer's ear), and making the cap 203 into a hemispherical shell. become unable. However, the protective cap 201 can make the shape of the cap body 203 into a hemispherical shell without providing an ear on the cap body 203.

  Further, according to the protective cap 201, the guide member 211 is integrally formed, and is provided integrally in contact with the cap body 203 at two positions in the left-right direction of the cap body 203. The rigidity of itself and the attachment rigidity when the guide member 211 is attached to the cap body 203 are high.

  In addition, the locking portion 271 </ b> B that locks the hammock constituting the interior body can be provided inside the central portion 219 of the guide member 211 while avoiding interference with the guide portion 213 and the shield plate 205.

  Further, according to the protective cap 201, the shield plate 205 is engaged with and moved at four locations (each surface 237, 245 and each long hole 239, 247) of the guide member 211. 205 can move relative to the cap body 203 in a smooth and stable state.

  By the way, in the protective cap 201, the shield plate 205 is supported and moved at both ends in the width direction. In addition to this support form, the shield plate 205 is moved at the center in the width direction. It may be configured to move while being supported. For example, an engagement piece similar to the engagement piece 251 is provided at the center in the width direction of the shield plate 205, and a long hole (a long hole similar to the long hole 239) that engages with the engagement piece The structure provided in 219 may be used.

  Moreover, you may employ | adopt the half type thing which covers only the upper half of a wearer's face as a shield board.

[Third Embodiment]
FIG. 28 is a diagram showing a schematic configuration of a protective cap 301 according to the third embodiment of the present invention, and FIG. 29 shows the outer shape of a cap body 303 of the protective cap 301 and a general-purpose protective cap body 300. FIG. 30 is a cross-sectional view of the protective cap 301 (a cross-sectional view taken along a plane extending through the center of the protective cap 301 in the front-rear and vertical directions).

  FIG. 31 is a diagram illustrating a state in which the wearer wears the protective cap 301. 31A and 31B show a state where the shield plate 305 is positioned at the storage position P301, and FIGS. 31C and 31D show that the shield plate 305 is positioned at the covering position P303. Indicates the state.

  The protective cap 301 includes a cap body 303 and a shield plate (shield member; face body) 305. The cap body 303 and the shield plate 305 are symmetrically formed. The cap 303 is provided with an ear 307 that covers the wearer's ear. Further, the cap body 303 is formed in a bowl shape that is formed so that only the front side of the cap body 303 is increased outward from the general-purpose cap body 300.

  Here, the general-purpose cap body 300 is a cap body that is not provided with a shield plate and is configured by a cap body and an interior body, and is necessary, for example, in order to conform to the standard of the Ministry of Health, Labor and Welfare (protection cap standard). It is a cap body of a protective cap formed to a minimum size. As a general-purpose cap body, a cap body 300 (see FIG. 29) such as an MP helmet having a longitudinal length of about 260 mm to 280 mm can be listed.

  The cap 303 has a hemispherical shell shape and is formed in a bowl shape in which an ear portion 307 formed in a plate shape is added. The thickness of the ear portion 307 and the thickness of the portion other than the ear portion of the cap body 303 substantially coincide with each other. Further, the thickness direction of the ear portion 307 is the left-right direction of the cap body 303 (the direction orthogonal to the paper surface in FIG. 28).

  The cap body 303 is formed in a hemispherical shell shape and is not formed in a complete hemispherical shell. That is, the cap body 303 is formed in a shape in which the radius of curvature is appropriately changed in order to match the shape of the wearer's head in the same manner as the cap body 3.

  In addition, the opening (the heel; lower end) 309 of the cap 303 is not completely circular, and the curvature radius or the like is appropriately set by matching the shape of the wearer's head or by providing the ear 307. It is formed in a changing circular shape.

  Since the cap body 303 is formed in a bowl shape, the outer surface and the inner surface of the cap body 303 have a smooth spherical shape with no sharp bends. Further, since the cap body 303 is formed in the shape of a bowl with an ear 307 provided on a hemispherical shell, when an upright wearer wears the protective cap 301, At the center portion, the ear portion 307 of the cap body 303 protrudes downward, and the ear portion 307 covers all or part of the wearer's ear.

  The shield plate 305 is formed, for example, in the same manner as the shield plate 5 and is made of a transparent (including colored and transparent) or translucent member such as a resin and covers all of the wearer's face. It is formed in the size that can be. Further, the shield plate 305 has a plate shape (curved plate shape; about ¼ spherical shell shape) having a spherical curved surface along the front inner surface (concave spherical curved surface) of the cap body 303. The engaging portions 311 are provided at both ends in the left-right direction. A guide portion 313 is formed on the ear portion 307 of the cap body 303, and the engagement portion 311 of the shield plate 305 is engaged with the guide portion 313, so that between the storage position P301 and the covering position P303, The shield plate 305 rotates around an arcuate locus about the central axis C301 of the engaging portion 311. The axis C301 is an axis that passes through the center of the ear portion 307 and extends in the left-right direction of the protective cap 301 (a direction orthogonal to the paper surface of FIG. 1).

  Here, the storage position P301 is a position when the shield plate 305 is stored inside the front side of the cap body 303, and the covering position P303 is the face of the wearer of the cap body 303 (the front surface of the head). ) To cover almost all of the above.

  The guide portion 313 is formed of, for example, a circular through hole 315 that penetrates the ear portion 307 of the cap body 303, and the engaging portion 311 is shielded at a lower portion on the side of the shield plate 305 (on both sides in the width direction). A cylindrical protrusion (protrusion whose outer diameter is slightly smaller than the through hole) 317 slightly protrudes outside the plate 305. The projections 317 are fitted in the through holes 315 (see FIG. 33, which is a cross-sectional view of XXXIII-XXXIII in FIG. 28), so that the shield plate 305 rotates. .

  The state in which the shield plate 305 is located at the storage position P301 will be described in detail. In this state, the shield plate 305 is not completely accommodated in the cap body 303, and the lower end portion (庇319 and a portion in the vicinity thereof protrude downward from a lower end portion (opening portion on the front side of the cap body 3) 309 on the front side of the cap body 303. However, the portion protruding downward does not interfere with the wearer, and the wearer can wear the protective cap 301 without being aware of the presence of the shield plate 305 in its field of view. Yes.

  The heel (ridge portion) 319 is inverted at the lower end portion of the shield plate 305 in the same manner as in the first embodiment. That is, the heel 319 is bent and extends in the reverse direction (the direction away from the wearer's face). Thereby, even when the flying object hits the shield plate (shield plate at the covering position P303) 305, it is possible to avoid a situation where the flying object slides on the surface of the shield plate 305 and contacts the wearer's body.

  Further, the upper end portion of the shield plate 305 is located near the top of the cap body 303. Note that the shield plate 305 may be completely accommodated in the cap 303 in a state where the flange 319 of the shield plate 305 is deleted and the shield plate 305 is positioned at the storage position P301.

  In a state where the shield plate 305 is positioned at the covering position P303, the lower end portion of the shield plate 305 is positioned below the wearer's chin, and the shield plate 305 covers almost all of the wearer's face. (See FIGS. 31 (c) and 31 (d)). That is, when viewed from the front, the shield plate 305 covers the entire face of the wearer. Note that the upper end portion of the shield plate 305 is located inside the cap body 303 in the vicinity of the lower end portion of the cap body 303 (the heel on the front side of the cap body 303).

  The protective cap 301 is provided with an inner member 321 that is formed symmetrically. The inner member 321 is provided integrally with the cap body 303 inside the front side of the cap body 303.

  As shown in FIG. 30 and FIG. 32 (a perspective view showing a schematic configuration of the inner member 321), the inner member 321 includes a central portion 323, an upright portion 325, and a protruding portion 327. The central portion 323 has a plate shape (curved plate shape; about ¼) having a spherical curved surface along the front inner surface of the cap body 303 (the curved surface inside the cap body 303 formed in a concave spherical shape). Size spherical shell).

  The standing part 325 is formed in a plate-like “U” shape, and stands at a predetermined height from the rear end of the central part 323 outward (in the convex direction) of the central part 323. The projecting portion 327 is formed in a plate-like “U” shape, and protrudes rearward from the standing portion 325 with a predetermined width.

  Then, one surface (outer convex surface) in the thickness direction of the projecting portion 327 engages (surface contact) with the inner surface (concave surface) of the cap body 303, so that the inner member 321 is moved into the cap body 303. The cap body 303 is integrally provided inside the front side. It should be noted that the surface inside the cap body 303 where the projecting portion 327 is in surface contact is such that the width thereof is in the front-rear direction of the cap body 303, and the left side of the cap body 303 is the center of the cap body 303 in the front-rear direction. Starting from the top of the cap 303 and extending to the right side of the cap 303 in a “U” shape.

  When the inner member 321 is installed on the cap body 303, the front side of the protective cap 301 has a double structure in which the cap body 303 is located outside and the inner member 321 is located inside. It enters the space formed by the inner member 321 (in the space formed by the cap body 303, the central part 323 and the standing part 325), is located at the storage position P301, and is stored in the cap body 303. It has become.

  When the inner member 321 is installed on the cap body 303, as shown in FIG. 30, the center of the arc-shaped central portion 323, the center of the arc-shaped shield plate 305, and the arc-shaped cap body 303 of the inner member 321 The center and the rotation center C301 of the shield plate 305 substantially coincide with each other. Further, the curvature radius of the cap 303 is larger than the curvature radius of the shield plate 305, and the curvature radius of the shield plate 305 is larger than the curvature radius of the central portion 323 of the inner member 321.

  The protective cap 301 is provided with a holding means 329 for holding the shield plate 305. The holding means 329 is a means for holding the shield plate 305 so that the shield plate 305 does not easily rotate with respect to the cap body 303 when the shield plate 305 is located at the storage position P301 or the covering position P303. is there.

  The holding means 329 includes, for example, projections 331, 333, 335, and 337 as shown in FIG. The protrusion 331 is formed in a hemispherical shape, and is integrally provided on the inner surface (concave surface) of the shield plate 305 at the rear end portion in the front-rear direction of the shield plate 305 and at the center portion in the width direction of the shield plate 305. It has been. The protrusion 333 is formed in a hemispherical shape, in the vicinity of the rear end of the central portion 323 in the front-rear direction of the inner member 321, and in the center in the width direction of the inner member 321, the outer surface (convex surface) of the inner member 321. ). The protrusion 335 is formed in a ¼ spherical shape, with one flat surface 335A facing the rear (upward) of the inner member 321, and at the front end of the central portion 323 in the front-rear direction of the inner member 321, The member 321 is integrally provided on the outer surface (convex surface) of the inner member 321 at the center in the width direction. The height of the protrusion 335 is higher than the heights of the other protrusions 331, 333, and 337. The protrusion 337 is formed in a hemispherical shape, slightly rearward (upward) from the protrusion 335 in the front-rear direction of the inner member 321, and in the center in the width direction of the inner member 321, the outer surface (convex) of the inner member 321. Surface).

  As shown in FIG. 30, in the state where the shield plate 305 is located at the storage position P301, the projection 331 of the shield plate 305 is sandwiched between the projection 333 of the inner member 321 and the standing part 325 of the inner member 321. Thus, the shield plate 305 is not easily rotated. When the shield plate 305 is rotated in the direction of the arrow shown in FIG. 30 so that the shield plate 305 positioned at the storage position P301 is positioned at the covering position P303, the projection 331 gets over the projection 333 and the shield plate 305 rotates. The shield plate 305 is positioned at the covering position P303 when it moves and gets over the projection 337, and the projection 331 is sandwiched between the projection 337 and the projection 335 so that the shield plate 305 does not rotate easily. .

  Note that the projection 335 includes a flat surface 335A and the height of the projection 335 is high, so that the shield plate 305 (the projection sandwiched between the projection 337 and the projection 335) located at the covering position P303. 331) is not further rotated in the direction of the arrow shown in FIG.

  By the way, the protective cap 301 is provided with an interior body (for example, a hammock) (not shown), and the cap body 303 and the inner member 321 are provided with a plurality of locking portions 339 for locking the hammock. Each locking portion 339A located on the rear side among the locking portions 339 is integrally provided on the inner surface of the cap body 303, and located on the front side among the locking portions 339. Each locking portion 339 </ b> B is integrally provided on the inner surface of the inner member 321.

  Further, in the present embodiment (third embodiment), as the shield plate 5 according to the first embodiment, the thickness of the shield plate 305 gradually decreases from the central portion toward the peripheral portion. It may be.

  Here, the operation | movement which wears the protective cap 301 and makes the shield board 305 enter / exit is demonstrated.

  First, the wearer wears the protective cap 301 with the shield plate 305 positioned at the storage position P301. When it is necessary to perform the operation with the shield plate 305 positioned at the covering position P303, if the lower end portion (for example, the bar 319) of the shield plate 305 is pulled downward, the shield plate 305 rotates and the shield plate 305 is rotated. Is located at the covering position P303.

  On the other hand, when the shield plate 305 positioned at the covering position P303 is positioned at the storage position P301, when the shield plate 305 is pushed upward, the shield plate 305 rotates and the shield plate 305 is moved to the storage position P301. To position.

  By the way, in the protective cap 301, the position of the rotation center C301 of the shield plate 305 may be configured to be adjustable. That is, as shown in FIG. 33, a plurality of through-holes 315a to 315i similar to the through-hole 315 are provided in the ear portion 307, and one of these through-holes 315a to 315i (actually left and right Two through holes) may be selected in the direction, and the protrusion 317 of the shield plate 305 may be fitted into the selected through hole (for example, the through hole 315b). In addition, each through-hole 315a-315i is mutually spaced apart slightly, for example, each through-hole 315b-315i is provided in the position which distributes the periphery centering around the through-hole 315a substantially equally.

  According to the protective cap 301, only the front side of the cap body 303 is enlarged, and the shield plate 305 moves along an arc-shaped locus about the axis C301. The shield plate 305 can be accommodated inside the cap body 303 even if the shield plate is enlarged so as to cover almost all of the cap body 303, and the entire cap body 303 and the protective cap 301 are increased in size and the mass is increased. This can be suppressed as much as possible. Further, since the cap body 303 is formed in a bowl shape, the outer (convex side) and inner surfaces of the cap body 303 are smoothly bent, and the rigidity of the cap body 303 is increased.

  If the position of the rotation center C301 of the shield plate 305 is adjustable in the protective cap 301, the position of the shield plate 305 with respect to the cap body 303 (particularly, the position of the shield plate 305 at the covering position P303) is worn. It can be adjusted according to the shape of the person's head and face, making the wearer feel less annoyed and improving the usability of the protective cap.

  Further, according to the protective cap 301, the shield plate 305 is configured to enter the space formed by the cap body 303, the central part 323 and the standing part 325 and be accommodated in the cap body 303. Therefore, it is easy to provide the locking portion 339B that locks the interior body (hammock) while avoiding interference with the shield plate 305.

[Fourth Embodiment]
35 and 36 are diagrams showing a schematic configuration of a protective cap 351 according to the fourth embodiment of the present invention, and FIG. 37 is an enlarged view of a portion X in FIG.

  Unlike the protective cap 301 according to the third embodiment, the protective cap 351 according to the fourth embodiment differs from the protective cap 301 according to the third embodiment in that the shield plate is divided into two parts and installed outside the cap body 353. The protection cap 301 according to the third embodiment is configured in substantially the same manner.

  That is, the protective cap 351 includes a cap body 353, a first shield plate 355, and a second shield plate 357.

  The cap body 353 is provided with an ear portion 359 that covers the ear and is formed in a hook shape. More specifically, the hook-shaped cap body 353 is formed in the same shape as a general-purpose cap body (general-purpose cap body described in the third embodiment) that does not include a shield plate, except for the ear portion 359. Yes.

  The first shield plate 355 has a curved surface (the radius of curvature is larger than the radius of curvature of the front curved surface of the cap body 353) along the front outer surface of the cap body 353 (the curved surface outside the cap body 353 formed in a convex spherical shape). Is formed into a plate shape (curved plate shape; about 1/8 spherical shell shape). On both sides in the width direction of the first shield plate 355, engaging portions 363 configured by, for example, circular through holes 361 are formed. The engaging portion 363 is engaged with a guide portion 367 constituted by a columnar protrusion 365 protruding from the outer surface of the cap body 353 at both ends in the width direction of the cap body 353, for example. The first shield plate 355 rotates around an engaging portion 363 while drawing an arcuate locus between the push-up position P305 and the covering position P307.

  The pushed-up position P305 is a position when the first shield plate 355 is pushed up outside the front side of the cap body 353, and the covering position P307 is a position where the first shield plate 355 is worn by the wearer of the cap body 353. It is a position that covers almost the upper half of the face (front of the head).

  The second shield plate 357 has a curved surface (curvature radius is larger than the curvature radius of the first shield plate 355) along the outer surface on the front side of the cap body 353 (the curved surface outside the cap body 353 formed in a convex spherical shape). Is formed into a plate shape (curved plate shape; about 1/8 spherical shell shape). Through holes 361 (engaging portions 363) are formed on both sides in the width direction of the second shield plate 357 in the same manner as the first shield plate 355, and the through holes 361 are projections 365 (guide portions 367). ) Is engaged. The second shield plate 357 is located outside the first shield plate 355 (particularly when the first shield plate 355 is located at the push-up position P305 when located at the covering position P311). The first shield plate 355 is covered outside), and is rotated with an arcuate locus between the push-up position P309 and the covering position P311 around the engaging portion 363.

  The pushed-up position P309 is a position when the second shield plate 357 is pushed up outside the front side of the cap body 353 (first shield plate 355), and the covering position P311 is the second shield plate 357. Is a position covering almost the lower half of the face (front surface of the head) of the wearer of the cap body 353.

  Further, the first shield plate 355 positioned at the covering position P305 is configured such that the upper end portion of the first shield plate 355 contacts the collar 360 of the cap body 353 and does not move further downward. Further, the second shield plate 357 located at the covering position P311 has a stopper 369 provided on the second shield plate 357 abutting against a stopper 371 provided on the first shield plate 355. And no further movement.

  The stopper 369 is formed by a bent portion that is bent at the upper end portion of the second shield plate 357 inside the second shield plate 357. The stopper 371 is formed by a bent portion that is bent at the lower end portion of the first shield plate 355 to the outside of the first shield plate 355.

  Further, in the present embodiment (fourth embodiment), as the shield plate 5 according to the first embodiment, the thickness of the shield plate 355 gradually decreases from the central portion toward the peripheral portion. It may be.

  According to the protective cap 351, when the shield plates 355 and 357 are positioned at the push-up positions P305 and P309, the second shield is provided outside the first shield plate 355 that mainly covers the wearer's eyes. Since the plate 357 is located and covers the first shield plate 355, the first shield plate 355 is hardly damaged. That is, for example, when the wearer of the protective cap 351 is not using the shield plates 355 and 357, even if the second shield plate 357 is inadvertently hit against an obstacle, the first shield plate 355 is not touched. It is possible to prevent scratches.

  As a result, when the wearer of the protective cap 351 uses the shield plates 355 and 357, the first shield plate 355 mainly covering the eyes of the wearer is not damaged, and a good field of view is ensured. be able to.

  By the way, in the said 3rd Embodiment and 4th Embodiment, you may make the position of a shield board reverse inside and outside. That is, in the third embodiment, as in the fourth embodiment, the cap body may be substantially the same as a general-purpose one, and the shield plate may be positioned outside the cap body. In this embodiment, as in the third embodiment, the front side of the cap body may be made larger than a general-purpose one, and the shield plate may be installed outside the cap body.

[Fifth Embodiment]
The main difference of the protective cap 501 according to the fifth embodiment of the present invention from the protective cap 1 according to the first embodiment and the protective cap 201 according to the second embodiment is that the shield plate 503 is guided. The configuration (form) of the guide means 505 is the same as the protective cap 1 according to the first embodiment and the protective cap 201 according to the second embodiment. There is an effect.

  The shield plate 503 guided by the guide means 505 is configured in substantially the same manner as that according to each of the above embodiments (for example, the first embodiment), and the protective cap 1 and the second cap according to the first embodiment. Similar to the protective cap 201 according to the embodiment, a collar 217 provided with a recess 275 is provided, and moves between the storage position P501 and the covering position P503 about the axis C501 as a rotation center. Yes.

  FIG. 38 is an exploded perspective view showing a schematic configuration of a protective cap 501 according to the fifth embodiment of the present invention.

  A protective cap 501 according to the fifth embodiment includes a cap body 507, a guide member 509 constituting a guide means 505, a shield plate 503, an impact absorbing member (impact absorbing liner) 513, a chin string 515, and an interior body (hammock) 517. And is configured. The impact absorbing member 513 is formed in a bowl shape with foamed polystyrene, for example. After the assembly 511 of the guide member 509 and the shield plate 503 is installed inside the cap body 507, the shock absorbing member 513 is installed inside the cap body 507 and assembly 511, and then the chin string The protective cap 501 is assembled and generated by installing the 515 and the hammock 517 on the cap body 507 and the guide member 509.

  In the protective cap according to each of the above embodiments, the shock absorbing member and the chin strap are not mentioned, but the protective cap according to each of the above embodiments may have a configuration in which the shock absorbing member and the chin strap are provided. Good.

  The cap body 507 is configured in substantially the same manner as the protective cap 1 according to the first embodiment and the protective cap 201 according to the second embodiment. That is, the cap body 507 is for protecting the wearer's head, and is made of a material such as resin, for example, as shown in FIG. 46 (a diagram showing a schematic configuration of the cap body 507). It is formed in a bowl shape (for example, a hemispherical shell shape). 46 (a) is a side view of the cap body 507, and FIG. 46 (b) is a front view of the cap body 507, as viewed from the arrow XLIB in FIG. 46 (a). (C) is a bottom view of the cap body 507, and is a view as seen from the arrow XLVIC in FIG.

  A cap body 507 of the protective cap 501 is composed of a cap body main body 519 and a cap body collar 521, and is molded in, for example, two colors. The cap body main body 519 is made of an opaque resin, and the cap body collar 521 is made of a transparent (including colored and transparent) resin or a translucent resin. In the protective cap according to each of the above embodiments, the cap body may be composed of a cap body main body portion and a cap body collar portion.

  As described above, the shield plate 503 is also configured in substantially the same manner except for the protective cap 201 according to the first embodiment and the portion related to the guide means 505 (the portion engaged with the guide member 509). ing.

  Here, the guide means 505 will be described in detail.

  39 is a cross-sectional view showing a schematic configuration of the protective cap 501, FIG. 40 is a front view of the protective cap 501, and is a view taken along arrow XL in FIG. 39, and FIG. 41 is a bottom view of the protective cap 501. It is a figure, Comprising: It is a XLI arrow line view in FIG.

  43 and 44 are views showing an assembly 511 of the guide member 509 and the shield plate 503, FIG. 43 (a) is a side view of the assembly 511, and FIG. 43 (b) is an assembly. 511 is a plan view taken along arrow XLIIIB in FIG. 43 (a), and FIG. 44 (a) is a bottom view of the assembly 511, taken along arrow XLIVA in FIG. 43 (a). 44 (b) is a diagram showing a cross section of XLIVB-XLIVB in FIG. 43 (b).

  FIG. 45 is a diagram illustrating details of the guide portion 523 and the like in the guide member 509. FIG. 45 (a) is an enlarged view of the XLVA portion in FIG. 44 (b). FIG. 45 (b) is an XLVB arrow view in FIG. 45 (a) or an enlarged view of the XLVB portion in FIG. 49 (b). 45A shows the shield plate 503 and the like, but in FIG. 45B, the display of the shield plate 503 and the like is omitted, and only the guide member 509 is drawn.

  49 and 50 are views showing the guide member 509, FIG. 49 (a) is a side view of the guide member 509, and FIG. 49 (b) is a plan view of the guide member 509. FIG. 50A is a front view of the guide member 509, and is a view taken in the direction of the arrow LA in FIG. 49A, and FIG. It is a figure which shows the LB-LB cross section in 50 (a), and FIG.50 (c) is a figure which shows the LC-LC cross section in Fig.50 (a).

  52 and 53 are diagrams showing the shield plate 503, FIG. 52 (a) is a front view of the shield plate 503, and FIG. 52 (b) is a plan view of the shield plate 503. FIG. 52 (a) is a LIIB arrow view, FIG. 52 (c) is a partial arrow view of the shield plate 503, FIG. 52 (b) is a LIIC arrow view, and FIG. 52 (d) is a view. FIG. 52 is a partial cross-sectional view of the shield plate 503, showing the LIID-LIID cross section in FIG. 52 (b), and FIG. 53 (a) is a side view of the shield plate 503, and FIG. FIG. 53B is a diagram showing a LIIIB-LIIIB cross section in FIG. 52A. 52 (a) and 53 (a), the portion 510 shaded in FIG. 52A is an optical characteristic range according to ANSI standards (the optical characteristic for the wearer of the protective cap 501 to see an object through the shield plate 503). Is a good range).

  The guide means 505 includes a guide portion 523 provided on a guide member 509 made of, for example, resin, and an engagement portion 525 provided on a shield plate 503 made of a transparent or translucent resin. ing.

  The guide member 509 includes a central portion 527 that is formed in a plate shape with a spherical curved surface, and the guide portion 523 is formed in the central portion 527. A plurality of guide portions 523 are formed so as to be elongated so as to guide the shield plate 503 when the shield plate 503 moves between the storage position P501 and the covering position P503. Each guide portion 523 is provided in the center of the central portion 527 in the width direction (left-right direction) so as to be substantially parallel to each other.

  More specifically, the central portion 527 is formed in a 1/4 spherical shell shape. Here, the 1/4 spherical shell (1/4 spherical shell) is a solid formed as follows. First, a solid (sphere) in which a second sphere having a radius slightly smaller than the radius of the first sphere and the center of which coincides with the first sphere is removed from the first sphere having a predetermined radius. Shell).

  Next, the spherical shell is divided into two by a first plane passing through the center of each sphere or the vicinity thereof, and a hemispherical shell which is one of the two divided solids is obtained.

  Next, the hemispherical shell is divided into two by a second plane that passes through the center of each sphere or the vicinity thereof and is substantially orthogonal to the first plane, and is one of the two divided solids. Obtain a 1/4 spherical shell. Since the guide member 509 is installed inside (inside) the cap body 507, the curvature radius of the central portion 527 of the guide member 509 (the curvature radius of the first sphere) is the curvature of the cap body 507. It is slightly smaller than the radius.

  The central portion 527 is formed in a “¼ spherical shell”, and is not formed in a complete “¼ spherical shell” shape. That is, the central portion 527 is formed in a shape in which the radius of curvature is appropriately changed in order to match the shape of the wearer's head, in the same manner as the cap body 507.

  The end portion of the central portion 527 is not a complete arc, but is also formed in an arc shape in which the radius of curvature is appropriately changed to match the shape of the wearer's head. Here, the end portion of the central portion 527 is an arc-shaped (semi-arc-shaped) portion (first semicircular end curve 529) formed by division in the first plane, and the second portion. Are arc-shaped (semi-arc-shaped) portions (second semi-circular end curve 531) formed by division in the plane.

  The first semicircular end curve 529 is, for example, substantially located on the first plane and has almost no unevenness in the direction orthogonal to the first plane. Since the central portion 527 has a thickness (difference between the radius of the first sphere and the radius of the second sphere), the first semicircular end curve 529 is more accurately It can be said that this is the first semicircular end curved surface.

  For example, the second semicircular end curve 531 slightly enters and exits the second plane in a direction orthogonal to the second plane. That is, slight unevenness exists in a direction orthogonal to the second plane. Note that, similarly to the case of the first semicircular end curve 529, the second semicircular end curve 531 can be said to be a second semicircular end curved surface more accurately.

  In a state where the guide member 509 is installed on the cap body 507, the central portion 527 of the guide member 509 is provided integrally with the cap body 507 inside the front side of the cap body 507 and slightly away from the cap body 507. ing. Thereby, a 1/4 spherical shell-shaped space 533 having a predetermined thickness thicker than the thickness of the cap body 507 or the thickness of the central part 527 is formed between the cap body 507 and the central part 527. A shield plate (a shield plate located at the storage position P501) 503 enters the quarter-shell-shaped space 533.

  To explain further, the first semicircular end curve 529 is located at the left end of a circular edge slightly spaced from the inner wall of the cap body 507 and along the inner wall of the cap body 507 and located at the lower end of the cap body 507. , From the vicinity of the head, through the vicinity immediately above the cap body 507, to the vicinity of the right end of the circular edge located at the lower end of the cap body 507. That is, the first semicircular end curve 529 extends from above the wearer's left ear, through the vicinity of the wearer's head, to above the wearer's right ear.

  The second semicircular end curve 531 is slightly separated from the front semicircular edge located on the front side at the lower end of the cap body 507 and along the front semicircular edge of the cap body 507, From the vicinity of the left end of the circular edge positioned at the lower end of the cap body 507, through the vicinity of the front end of the edge of the cap body 507, the right end of the circular edge positioned at the lower end of the cap body 507 It extends to the vicinity. That is, the second semicircular end curve 531 extends from above the wearer's left ear through the vicinity of the wearer's forehead to above the wearer's right ear.

  For example, three guide portions 523 provided in the central portion 527 of the guide member 509 are provided. Each guide portion 523 is configured by, for example, oval through holes (through holes penetrating the central portion 527 in the thickness direction) 535, 537, and 539, and the center of the central portion 527 in the width direction. And on the left and right sides.

  The guide portion 523 (through hole 535) provided at the center of the central portion 527 is from the vicinity of the center of the second semicircular end curve 531 to the vicinity of the center of the first semicircular end curve 529. Is formed. That is, the through-hole 535 provided in the center extends from the vicinity of the center of the wearer's forehead to the center of the wearer's forehead while maintaining the center position in the lateral direction (width direction; left-right direction). It extends to the vicinity of the wearer's top.

  The left guide portion 523 (through hole 537) is provided in parallel with the through hole 535 provided in the center, and from the vicinity of the diagonally forward portion on the left side of the second semicircular end curve 531. It is formed up to the vicinity of the diagonally upper part on the left side of one semicircular end curve 529. That is, the through-hole 537 provided on the left side passes through the diagonally left front part of the wearer's forehead from the vicinity of the diagonally left front part of the wearer's forehead, and obliquely upper left of the top of the wearer's head. It extends to the vicinity of the part.

  The right guide portion 523 (through hole 539) is provided symmetrically with the through hole 537 provided on the left side with the through hole 535 provided in the center therebetween. That is, the right side through hole 539 is provided symmetrically with the left side through hole 537 with respect to a plane that extends in the vertical and longitudinal directions through the center of the guide member 509.

  Here, the positional relationship between the three guide portions 523 (through holes 535, 537, 539) will be described in more detail. For convenience of explanation, the existence of the side portions 541 and 543 (see FIG. 49, etc.) of the guide member 509 is ignored (assuming that the side portions 541 and 543 of the guide member 509 do not exist). ).

  Extension lines of the three through holes 535, 537, and 539 (centers extending in the longitudinal direction of the through holes 535, 537, and 539, which are center lines in the width direction of the oval through holes 535, 537, and 539) Line) and the intersection of the second semicircular end curve 531 are a lower left intersection 545, a lower central intersection 547, and a lower right intersection 549, respectively (FIGS. 49A, 49B, and 49C). 50 (a)).

  Thus, the left end of the second semicircular end curve 531 (the left end coinciding with the left end of the first semicircular end curve 529; see FIG. 49A) 551 and the lower left intersection 545 The distance between (the path on the second semicircular end curve 531) is the distance between the lower left intersection 545 and the lower central intersection 547 (the path on the second semicircular end curve 531). It is equal or slightly larger.

  Similarly, the right end of the second semicircular end curve 531 (the right end coinciding with the right end of the first semicircular end curve 529; see FIG. 49A) 553 and the lower right side The distance between the intersection points 549 (the path on the second semicircular end curve 531) is the distance between the lower right intersection point 549 and the lower central intersection point 547 (on the second semicircular end curve 531). Is equal to or slightly larger than

  Further, as shown in FIG. 49 (b), the intersections of the extension lines of the three through holes 535, 537, and 539 and the first semicircular end curve 529 are respectively shown in the upper left intersection 555, An upper center intersection 557 and an upper right intersection 559 are used.

  Thus, the distance between the left end 551 of the first semicircular end curve 529 and the upper left intersection 555 (the path on the first semicircular end curve 529) is the upper left intersection 555 and the upper center. It is equal to or slightly larger than the distance to the intersection point 557 (the path on the first semicircular end curve 529).

  Similarly, the distance between the right end 553 of the first semicircular end curve 529 and the upper right intersection 559 (the path on the first semicircular end curve 529) is the upper right intersection 559. Is equal to or slightly larger than the distance between the upper central intersection 557 (the path on the first semicircular end curve 529).

  Thus, by providing the guide portion 523, the guide portion 523 (through holes 535, 537, 539) extends in the up-down and forward-backward directions on the central portion side of the central portion 527 (closer to the central portion in the width direction). Will be provided.

  The central guide portion 523 (through hole 535) may be deleted to provide two guide portions 523, or the central guide portion 523 (through hole 535) may be provided in two, and one guide may be provided. The structure may be such that four guide portions (oval through holes) are provided by moving the portion slightly to the left of the center and moving the other guide portion to the right of the center. Furthermore, the structure which provided five or more multiple guide parts extended in the up-down front-back direction at the center side (width direction from the center) of the center site | part 527 may be sufficient.

  Further, the guide member 509 includes a central portion 527, a plate-like first side portion (left side portion) 541, and a plate-like second side portion (right side portion) 543. It is configured with. The first side portion 541 is provided integrally with the central portion 527 on the one end side (left side) in the width direction of the central portion 527 and below the central portion 527. The second side part 543 is provided integrally with the central part 527 on the other end side (right side) in the width direction of the central part 527 and below the central part 527.

  And a pair of center part engaging part 561 (refer FIG.49 (b) etc.) engages with a pair of center part engaged part 563 (refer FIG.46 (c)), and the 1st side part of the left side The engaging portion 565 (see FIG. 49A) engages with the first side portion engaged portion 567 (see FIG. 46C), and the right second side portion engaging portion 569 ( 49 (a)) is engaged with the second side portion engaged portion 571 (see FIG. 46 (c)), and the guide member 509 is configured to be provided integrally with the cap body 507. ing.

  The pair of central portion engaging portions 561 are formed in the central portion 527 in the vicinity of the side portions 541 and 543, and the pair of central portion engaged portions 563 are provided on the side of the cap body 507. Yes. The first side portion engaging portion 565 is provided in the first side portion 541, and the first side portion engaged portion 567 is provided on the diagonally left rear side of the cap body 507. . The second side portion engaging portion 569 is provided in the second side portion 543, and the second side portion engaged portion 571 is provided on the diagonally right rear side of the cap body 507. .

  More specifically, the first side portion 541 is formed in a short strip shape with substantially the same thickness as the central portion 527. One end of the first side portion 541 in the longitudinal direction is connected to the lower end side (left lower end side) of the first semicircular end curve 529. In addition, the second side portion 543 is provided symmetrically with the first side portion 541 with respect to a plane that extends through the center of the guide member 509 and extends in the vertical direction. As a result, one end portion (lower end) in the width direction of the first side portion 541 is located substantially on the left extension line of the second semicircular end curve 531 of the central portion 527, and the central portion One end portion (lower end portion) of the second side portion 543 in the width direction is positioned on a substantially extended line on the right side of the second semicircular end curve 531 of 527.

  The guide member 509 is detachably attached to the cap body 507, and a pair of central portion engaging portions 561 formed in the central portion 527 of the guide member 509 is provided in the cap body 507. By engaging the part engaged portion 563, the guide member 509 installed on the cap body 507 is not easily separated from the cap body 507.

  For example, the central portion engaging portion 561 is elastic with a first central portion engaging portion (protrusion slightly protruding from the central portion 527 to the outside) 573 (see FIG. 49A) regarded as a rigid body. And a second center portion engaging portion 575 (see FIG. 49A). The central portion engaged portion 563 is configured by a portion 577 that is regarded as a rigid body (a protrusion that slightly protrudes from the inner wall of the cap body 507 to the inside of the cap body 507; see FIGS. 46C and 48). . 48 (a) is a side view of the central portion engaged portion 563, and FIG. 48 (b) is an XLVIIIB arrow view in FIG. 48 (a).

  When the guide member 509 is installed on the cap body 507 (when the first central portion engaging portion 573 is engaged with the central portion engaged portion 563), the second central portion engaging portion 575 is When the guide member 509 is completely installed on the cap body 507 by contacting the cap body 507 (the central portion engaged portion 563 and its surroundings) and elastically deforming (the first central portion engaging portion 573 is placed in the central portion). When the engagement with the engaged portion 563 is completed), the second central portion engaging portion 575 is restored. The restored second central portion engaging portion 575 prevents the guide member 509 once installed on the cap body 507 from being easily separated from the cap body 507.

  That is, even when an external force is applied to the cap body 507, the guide member 509, or the shield plate 503, such as when the shield plate 503 is moved, the guide member 509 is not easily separated from the cap body 507. Yes. The central part engaging portion 561 and the central part engaged portion 563 are provided at positions that do not interfere with the shield plate 503.

  FIG. 42A is a view showing a state where the central part engaging portion 561 of the guide member 509 is engaged with the central part engaged portion 563 of the cap body 507, which is the XLIIA-XLIIA shown in FIG. It is a figure which shows a partial cross section.

  The length value of the band-shaped first side part 541 and the band-shaped second side part 543 is slightly smaller than the half value of the length of the second semicircular end curve 531. Yes. The first side portion engaging portion 565 includes two through holes 579 and 581 that pass through the first side portion 541 in the thickness direction.

  One through hole (rear through hole) 581 of the two through holes 579 and 581 constituting the first side portion engaging portion 565 is a tip portion (first portion) of the first side portion 541. The two side holes 579 and 581 constituting the first side portion engaging portion 565 are provided in the vicinity of the end portion opposite to the central portion 527 in the longitudinal direction of the side portion 541. The other through-hole (front through-hole) 579 is provided between the central portion engaging portion 561 and the rear through-hole 581 in the longitudinal direction of the first side portion 541 (for example, approximately the central portion). ing.

  Similarly to the case of the first side portion engaging portion 565, the second side portion engaging portion 569 is constituted by the rear through hole 581 and the front through hole 579, and the second side portion engaging portion 569 is also provided. The through-holes 579 and 581 of the engaging portion 569 pass through the center of the guide member 509, and the through-holes 579 and 581 of the first side portion engaging portion 565 with respect to a plane extending in the up-down and front-back directions. And symmetrically provided.

  As shown in FIGS. 46 (c) and 47, the first side portion engaged portion 567 is arranged from the inner wall of the cap body 507 to the cap body 507 in the vicinity of the opening (edge of the lower end) of the cap body 507. 2 projections (front projection and rear projection) 583 that slightly project inside. The second side portion engaged portion 571 is provided symmetrically with the first side portion engaged portion 567 with respect to a plane that extends through the center of the cap body 507 in the vertical direction. Yes. That is, each of the side portion engaged portions 567 and 571 includes two front protrusions 583 and two rear protrusions 583.

  47 (a) is a side view of the side portion engaged portions 567 and 571 and a cap locking portion 585 described later, and FIG. 47 (c) is a view taken along the line XLVIIC in FIG. 47 (a). 47 (b) is a view taken along arrow XLVIIB in FIG. 47 (c), and FIG. 47 (d) is a diagram showing a cross section XLVIID-XLVIID in FIG. 47 (b).

  In a state where the first side portion engaging portion 565 is engaged with the first side portion engaged portion 567, the first side portion 541 is in contact with the inner wall of the cap body 507. In addition, in a state where the first side portion engaging portion 565 is engaged with the first side portion engaged portion 567, the guide member 509 (first side portion 541) moves relative to the cap body 507. Therefore, the cap body 507 is slightly movable in the front-rear direction of the cap body 507 (in the direction of the inner periphery of the cap body 507). In the vertical direction, the cap body 507 can move inside. In addition, the movement of the cap body 507 in the thickness direction is configured to be regulated by installing the hammock 517 on the cap body 507. The state in which the second side portion engaged portion 569 is engaged with the second side portion engaged portion 571 is also the same as the first side portion engaged portion 567. This is similar to the state in which 565 is engaged.

  In a state where the guide member 509 has been installed on the cap body 507, the first side portion engaged portion 565 is engaged with the first side portion engaged portion 567, and the second side portion engaged portion is engaged. The second side portion engaging portion 569 is engaged with the joint portion 571, and the central portion engaging portion 561 is engaged with the central portion engaged portion 563. The guide member 509 is firmly installed on the cap body 507.

  Further, in the state where the guide member 509 has been installed on the cap body 507, the lower edge of the guide member 509 (the second semicircular end curve 531 and the lower ends of the side portions 541 and 543) It extends along the edge of the cap body 507 near the inside of the edge (opening) of the cap body 507. Further, when the cap body 507 and the guide member 509 are viewed from the lower side to the upper side in the state where the guide member 509 has been installed on the cap body 507, the edge of the cap body 507 has a substantially annular shape (diameter in the front-rear direction). Is formed in an annular shape larger than the diameter in the width direction. On the other hand, the guide member 509 is formed in a horseshoe shape that is not connected at a slight rear portion (the distal ends of the side portions 541 and 543 are slightly separated from each other). The guide member 509 may have an annular shape in the same manner as the edge of the cap body 507.

  The amount of protrusion at the first side portion engaged portion 567 and the second side portion engaged portion 571 is larger than the protrusion 583 constituting the engaged portions 567 and 571. A locking portion (cap locking portion formed of four protrusions) 585 formed with a projection having a large amount of protrusion to the inside of the cap body 507 is formed (FIGS. 46C and 47). reference). The cap body locking part 585 is a part for locking the hammock 517.

  Inside the central portion 527 of the guide member 509 and in the vicinity of the second semicircular end curve 531, there is a locking portion (consisting of four protrusions) configured similarly to the cap body locking portion 585. Guide member locking portion) 587 is formed (see FIGS. 49B and 51). The guide member locking part 587 is also a part for locking the hammock 517.

  51 (a) is a side view of the guide member locking portion 587 located in the front among the guide member locking portions, and FIG. 51 (c) is a LIC arrow in FIG. 51 (a). FIG. 51B is a view taken in the direction of arrow LIB in FIG. 51C, and FIG. 51D is a view showing a LID-LID cross section in FIG. 51B.

  51 (e) is a side view of the guide member locking portion 587 located rearward among the guide member locking portions, and FIG. 51 (g) is a LIG arrow in FIG. 51 (e). Fig. 51 (f) is a view taken along the line LIF in Fig. 51 (g), and Fig. 51 (h) is a diagram showing a LIH-LIH cross section in Fig. 51 (f).

  The guide member locking portion 587 of the guide member 509 is provided symmetrically with respect to a plane that passes through the center of the guide member 509 and expands in the vertical and forward / backward directions. Accordingly, in a state where the guide member 509 has been installed on the cap body 507, the locking portions 585 and 587 are provided in a total of eight locations.

  Then, in the state where the guide member 509 has been installed on the cap body 507, the locked portion 589 of the hammock 517 is locked to the cap body locking portion 585 and the guide member locking portion 587, and the hammock 517 is When the installation on the cap body 507 is completed, the side portions 541 and 543 of the guide member 509 are sandwiched between the cap body 507 and the locked portion 589 of the hammock 517, and each side portion of the guide member 509 is placed. 541 and 543 are in contact with the inner wall of the cap body 507, and as described above, the side portions 541 and 543 of the guide member 509 are substantially fixed with respect to the cap body 507 (see FIG. 42 (b) and FIG. 42 (c)). 42 (b) is a diagram showing a cross section XLIIB-XLIIB in FIG. 41, and FIG. 42 (c) is a diagram showing a cross section XLIIC-XLIIC in FIG.

  The side portions 541 and 543 are formed by rounding corners. That is, two corners (ends in the vertical direction) are located at the longitudinal ends of the first side part 541 and the second side part 543 (ends opposite to the central part 527). When viewed from the thickness direction of the side portions 541 and 543, the outer shape line is formed in a quarter arc shape (see reference numeral 591 in FIG. 49A). Furthermore, the other side portions 541 and 543 (the middle portion in the longitudinal direction and the lower end portion in the vertical direction) are also formed with rounded corners (reference numeral 593 in FIG. 49A). reference).

  Since the side portions 541 and 543 are formed by rounding the corners, the guide member 509 can be prevented from being damaged due to stress concentration, and the cap body 507, the shield plate 503, and the like by the guide member 509 can be prevented. The wearer of the protective cap 501 can be prevented from being damaged.

  Incidentally, as described above, the guide portion 523 of the guide member 509 includes, for example, three oval through holes 535, 537, and 539. In response to this, the engaging portion 525 of the shield plate 503 includes three cylindrical portions 595 (see FIG. 45).

  Each of the cylindrical portions 595 constituting the engaging portion 525 engages with each of the three through holes 535, 537, and 539 constituting the guide portion 523 of the guide member 509 ( As the cylindrical portion 595 enters the through holes 535, 537, and 539), the shield plate 503 is guided to move between the storage position P501 and the covering position P503.

  More specifically, the width B501 of the oval through holes 535, 537, and 539 is very slightly larger than the outer diameter D501 of the cylindrical portion 595 (see FIG. 45B). In addition, disc-shaped flange portions 599 and 601 having an outer diameter larger than the outer diameter of the columnar portion 595 are integrally provided at both ends of the columnar portion 595, whereby the engaging member 597 is provided. Is formed (see FIG. 45A).

  As shown in FIG. 52A, a semicircular plate-like installation portion 603 for installing the engaging member 597 is integrally provided at the upper end portion of the shield plate 503. At the center of the semicircular disc-shaped installation portion 603, there is a through-hole that penetrates the semicircular disc-shaped installation portion 603 in the thickness direction (the inner diameter is the outer diameter D501 of the cylindrical portion 595 of the engaging member 597. A slightly larger through hole) 605 is formed. The installation portion 603 and the through hole 605 are provided at three locations corresponding to the three through holes 535, 537, and 539 of the guide member 509.

  And the installation part 603 of the shield board 503 and the center part 527 of the guide member 509 enter between each flange part 599,601 provided in the both ends of the cylindrical part 595, and each flange part 599,601. Thus, the installation portion 603 of the shield plate 503 and the central portion 527 of the guide member 509 are sandwiched, and the columnar portion 595 has an oval through hole 535, 537, 539 in the guide portion 523 and a circular through hole in the installation portion 603. 605. As a result, when the shield plate 503 moves relative to the cap body 507 and the guide member 509, the shield plate 503 moves only in the substantially longitudinal direction of the through holes 535, 537, and 539 constituting the guide portion 523. It has become.

  In addition, the engaging member (member with a flange) 597 comprised by the cylindrical part 595 and each flange part 599,601 is the 1st cylindrical member 607 which provided the flange part 599 in one edge part, and the other A second tubular member 609 having a flange portion 601 at the end thereof, and a rivet 611 which penetrates along the central axis of each tubular member 607, 609 and integrates each tubular member 607, 609 by caulking. It consists of and.

  In a state where the shield plate 503 is positioned at the storage position P501, the columnar portion 595 of the flanged member 597 is in contact with the upper end portions of the oval through holes 535, 537, and 539. On the other hand, in the state where the shield plate 503 is located at the covering position P503, the columnar portion 595 of the flanged member 597 is in contact with the lower end portions of the oval through holes 535, 537, and 539.

  In addition, the protective cap 501 is provided with a holding means 613 for holding the state where the shield plate 503 is located at the storage position P501 or the covering position P503 in the same manner as the protective caps 1 and 201. Here, the holding means 613 will be described in detail.

  Of the three oval through holes 535, 537 and 539 forming the guide portion 523, the widths of the two oval through holes 537 and 539 existing on the left and right sides are constant. ing. On the other hand, of the three oval through holes 535, 537, and 539 forming the guide portion 523, the oval through hole 535 present in the center is near the end in the longitudinal direction. The width is slightly reduced (see FIG. 45 (b)). As a result, the shield plate 503 can maintain this position at the storage position P501 and the covering position P503.

  More specifically, as shown in FIG. 45B, an upper end portion 615 of an oval through hole (central through hole) 535 existing in the center of the guide member 509 is formed in a horseshoe shape with an arc. Yes. The diameter D503 of the arc of the upper end portion 615 formed in an arc shape and a horseshoe shape is very slightly larger than the outer diameter D501 of the columnar portion 595 of the flanged member 597.

  The distance between both end portions 617 of the upper end portion 615 (the distance in the width direction at the exit of the arc-shaped and horseshoe-shaped upper end portion 615) L501 is slightly smaller than the outer diameter D501 of the cylindrical portion 595 of the flanged member 597. ing. When the flanged member 597 located in the middle portion in the longitudinal direction of the oval central through hole 535 moves to the upper end portion 615 of the oval central through hole 535, The cylindrical portion 595 comes into contact with both end portions 617 of the upper end portion 615, a part of the guide member 509 is elastically deformed, and the distance L501 between the both end portions 617 increases to the value of the outer diameter D501 of the cylindrical portion 595. It is comprised so that it may become. Further, when the flanged member 597 is moved so that the columnar portion 595 of the flanged member 597 is positioned at the upper end portion 615, each end 617 is restored, and the position of the flanged member 597 is maintained. Yes.

  Between the both end portions 617 and the separated portion 619 which is separated from the both end portions 617 by a predetermined distance to the lower end side of the oval through-hole 535, an ellipse is formed toward the both end portions 617 from the separated portion 619. The width of the through hole 535 is gradually narrowed little by little. That is, a tapered portion 621 is formed between the separation portion 619 and the both end portions 617. As a result, when the shield plate 503 is moved from the covering position P503 to the storage position P501, the cylindrical portion 595 of the flanged member 597 does not suddenly come into contact with both end portions 617 of the horseshoe-shaped upper end portion 615, and the upper end portion Damage to both ends 617 of 615 can be prevented.

  In addition, the lower end part side of the oval through-hole 535 is also provided with the same tapered part as the upper end part side. Further, in order to facilitate elastic deformation of the horseshoe-shaped end portions 617, a pair of through holes (a central portion 527 of the guide member 509 are penetrated in the thickness direction in the vicinity of the outer sides of the horseshoe-shaped end portions 617. Two circular through-holes) 623 are provided.

  The through hole 623 may be provided on the lower end side of the oval through hole 535 instead of or in addition to the upper end side of the oval through hole 535.

  Further, the above-described holding means 613 and the like may be provided in the left and right oval through holes 537 and 539 instead of or in addition to being provided in the central oval through hole 535.

  By the way, a concave portion 625 that is slightly recessed inside the central portion 527 is provided around the oval through holes 535, 537, and 539 provided in the central portion 527 of the guide member 509. The concave portion 625 has a predetermined width and is provided so as to surround the oval through holes 535, 537, and 539. Further, as described above, the installation portion 603 provided at the upper end portion of the shield plate 503 is also provided in a slightly recessed manner inside the shield plate 503 (see FIGS. 52B and 53). Three projections 627 are provided in the vicinity of these three recesses 625 and at the second semicircular end curve 531 of the central portion 527 of the guide member 509. These three protrusions 627 protrude to the front side (outside) of the central portion 527 in the thickness direction of the central portion 527 of the guide member 509.

  In the state where the shield plate 503 is installed on the guide member 509 using the three flanged members 597 provided corresponding to the three through holes 535, 537, and 539, the upper end portion of the shield plate 503 has three flanges. The installation portion 603 supported by the guide member 509 via the attachment member 597 and provided at the upper end portion of the shield plate 503 enters the recess 625 provided at the central portion 527, and the shield plate The inner surface of 503 abuts against each protrusion 627 of the central portion 527 indirectly, for example, with a packing 631 described later in detail.

  Further, in a state where the guide member 509 on which the shield plate 503 is installed is installed on the cap body 507, a slight gap 629 is formed between the outer surface of the shield plate 503 and the semicircular arc edge on the front side of the cap body 507. (See FIG. 39).

  As a result, in the normal state (in a state where the upright wearer simply wears the protective cap 501), the upper end portion of the shield plate 503 is supported by the guide member 509 via the flanged member 597. Further, the inner surface of the shield plate 503 is in contact with the protrusion 627 of the central portion 527 indirectly, for example, with a packing 631 described later in detail, and the shield plate 503 is supported by the guide member 509. The shield plate 503 moves in an arc shape between the storage position P501 and the covering position P503.

  In addition, with the guide member 509 having the shield plate 503 installed on the cap body 507, an external force in the direction of lifting the lower end of the shield plate 503 or in the direction of separating the shield plate 503 from the wearer's face is applied to the shield plate 503. In this case, there is no slight gap 629 between the outer surface of the shield plate 503 and the arcuate edge on the front side of the cap body 507, and the outer surface of the shield plate 503 is arcuate on the front side of the cap body 507. For example, a seal 631 which will be described in detail later is in direct contact with the edge of the shield plate 503 so that the rotation of the shield plate 503 by the external force is restricted.

  That is, the shield plate 503 is engaged with the guide member 509 at the installation portion 603 at the upper end. Further, the shield plate 503 is sandwiched between the projection 627 and the semicircular arc edge on the front side of the cap body 507 at the lower portion (the portion covering the face of the wearer of the cap body 507). The body 507 is engaged with any one of the front semicircular arc edges. And it is prevented that the shield board 503 shakes largely.

  It should be noted that portions of the shield plate 503 other than the engaging portion described above are opposed to the guide member 509 and the cap body 507 with a slight gap therebetween.

  For example, a plate-shaped packing (low friction member; scratch) is formed on the three protrusions 627 provided in the central portion 527 of the guide member 509 and the periphery thereof, and the edge of the cap body 507 forming the gap 629 and the vicinity thereof. An anti-sticking material 631 is attached (see FIGS. 44 (a) and 46 (c)). As a result, the shield plate 503 (excluding the installation portion 603 and the flange 217) is not in contact with the guide member 509 and the cap body 507, and the shield plate 503 has a small frictional resistance between the storage position P501 and the covering position P503. And the part of the shield plate 503 that enters the field of view of the wearer of the cap body 507 (ANSI standard optical characteristic range 510 shown in FIG. 52A) is prevented from being damaged.

  The packing 631A provided in the central portion of the guide member 509 is formed in a “U” shape, and sandwiches the central oval through-hole 535 from the lower end to the upper end of the guide member 509. It is longer than the other packing 631. Thereby, damage to the shield plate 503 can be prevented more reliably.

  Each oval through-hole 535, 537, 539 provided in the central portion 527 of the guide member 509, a recess 625 formed around these through-holes 535, 537, 539, and guide member locking The positional relationship with the part 587 will be described in more detail.

  As described above, the guide member locking portions 587 are provided at four places as shown in FIG. The leftmost guide member locking portion 587A is substantially in the middle between the left central portion engaging portion 561A and the left through hole 537 in the extending direction of the second semicircular end curve 531. The guide member locking portion 587B located next to the left side is adjacent to the recess 625 of the left through-hole 537 in the extending direction of the second semicircular end curve 531. It is located between the left through hole 537 and the central through hole 535. Further, the two guide member locking portions 587C and 587D located on the right side pass through the center of the guide member 509, and the right guide member locking portions 587A and 587B with respect to the plane extending in the up and down direction. And symmetrically provided.

  Since the guide member locking portion 587 is provided at such a position, the hammock 517 is placed at an appropriate position of the guide member 509 while avoiding interference between the guide member locking portion 587 and the guide portion 523 of the guide member 509. The external force applied to the cap body 507 can be appropriately received with the hammock 517.

  Further, among the cap body locking portions 585, the locking portion 585A provided on the leftmost side or the locking portion 585B provided on the left side (see FIG. 46 (c)), the guide member locking portion. The locked portion 633 of the ear cord (chin cord) 515 is engaged with the locking portion 587A (see FIG. 43 (b)) provided on the leftmost side of the 587, and the cap body engagement is further performed. Of the locking portions 585, the locking portion 585D provided on the rightmost side or the locking portion 585C provided on the right side (see FIG. 46 (c)), the most of the guide member locking portion 587. The locked portion 633 of another ear cord (chin cord) 515 is engaged with the locking portion 587D (see FIG. 43 (b)) provided on the right side, and each jaw cord 515 is engaged with the cap body 507. And the guide member 509 can be installed at appropriate positions. Wearer of the cap 501 can be fixed protective cap 501 with the chin strap 515 to the wearer's head wearing discomfort without protective cap 501.

  As already understood, since the cap body locking portion 585 is provided on the rear side of the cap body 507 and the guide member 509 is provided on the front side of the cap body 507, the cap body locking portion 585 is provided. Is positioned behind the guide member locking portion 587.

  After the locked portion 633 of the chin string 515 is engaged with the cap body locking portion 585 and the guide member locking portion 587, the locked portion 589 of the hammock 517 is locked with the cap body locking portion 585 and the guide member locking portion. By engaging with the portion 587, the chin string 515 (the locked portion 633) and the hammock 517 (the locked portion 589) are integrally installed on the cap body 507 and the guide member 509. . The hammock 517 is easily detachable from the cap body 507 and the guide member 509, and the hammock 517 once installed does not easily come off from the cap body 507 and the guide member 509. Yes.

  Further, in the protective cap 501, the side portions 541 and 543 of the guide member 509 and the locked portion 633 of the jaw string 515 are sandwiched between the cap body 507 and the locked portion 589 of the hammock 517, and the cap It is installed integrally with the body 507 (see FIG. 42B).

  According to the protective cap 501, the guide member 509 includes a central portion 527 that is formed in a plate shape with a spherical curved surface, and the guide portion 523 is located at the central portion (for example, near the center of the central portion 527 in the width direction). ) So that a so-called narrow guide is formed. Compared with the case where the guide portion 523 is provided on the side of the central portion 527 (each end in the width direction), the shield The plate 503 can be taken in and out (moved between the storage position P501 and the covering position P503) smoothly.

  Further, according to the protective cap 501, the guide member 509 is configured to include the central portion 527 and the side portions 541 and 543, and is formed in the central portion 527 in the vicinity of the side portions 541 and 543. A pair of central portion engaging portions 561 (561A, 561B) are engaged with a pair of central portion engaged portions 563 provided on the cap body 507, and the side portions 541 and 543 are formed on the sides. Since the side portion engaging portions 565 and 569 are engaged with the side portion engaged portions 567 and 571 formed on the cap body 507, the guide member for the cap body 507 when the shield plate 503 is taken in and out. The shakiness of 509 can be reduced.

  That is, when the shield plate 503 is put in and out, since the shield plate 503 is guided by the guide member 509, a rotational moment about the axis C501 extending in the width direction of the cap body 507 is applied to the guide member 509. Although the rotational moment is transmitted from the guide member 509 to the cap body 507, the central portion engaging portion 561 of the guide member 509 engaged with the central portion engaged portion 563 of the cap body 507 serves as a fulcrum, and the cap body. Since the side portion engaging portions 565 and 569 of the guide member 509 engaged with the side portion engaged portions 567 and 571 of the reference numeral 507 receive a rotational moment, the above-described rattling can be reduced.

  Further, since the side portion engaging portions 565 and 569 of the guide member 509 are provided at two places on the left side and two places on the right side, rattling can be further reduced. Further, the rear side portion engaging portion (through hole 581) of the two left side portion engaging portions 565 and the rear side portion of the two right side portion engaging portions 565. Since the part engaging part (through hole 581) is located in the vicinity of the rear end part of the cap body 507, the center part engaging part 561 serving as a fulcrum and the side part engaging part 565 on the rear side are arranged. Since the distance between them is large, the rattling can be further reduced.

  Further, according to the protective cap 501, the guide portion 523 of the guide member 509 is configured by three oval through holes 535, 537, and 539, and the engaging portion 525 of the shield plate 503 is formed by three cylindrical shapes. The shield plate 503 is guided by each of the cylindrical portions 595 engaging with the three through holes 535, 537, and 539, and the storage position P 501 and the covering position P 503. Since the shading of the shield plate 503 with respect to the guide member 509 is reduced, the shield plate 503 moves smoothly with respect to the guide member 509 with a simple configuration. It has become.

  In addition, you may employ | adopt the half type thing which covers only the upper half of a wearer's face as the shield board 503. FIG. Further, the shield plate 503 may be formed in the same manner as the shield plate according to the first embodiment. That is, for example, as shown in FIG. 15 and FIG. 16, the shape may be formed such that the thickness gradually decreases from the central portion toward the peripheral portion.

1 Helmet (Protective cap)
3 Cap body 5 Shield plate (shield member)
7 Guide means 17
75 recess

Claims (6)

  The shield member provided on the helmet is made of a transparent body or a semi-transparent body, curves outward toward the face side surface, and outwards from the upper part of the face front toward the lower jaw. Curved, the lower end of the shield member protrudes forward and downward, and narrows toward both sides of the face.The central part of the face forms a long buttocks, and the buttocks of the shield member are spaced from the lower jaw part of the face. A shield member characterized by being provided open. The shield member according to claim 1,
The lower end of the main-body part is formed in the downward convex circular arc shape, The shielding member characterized by the above-mentioned. In the shield member according to claim 1 or 2,
A shield member, wherein a lower end of the buttocks is located below the wearer's chin. In the shield member according to any one of claims 1 to 3,
A shield member, characterized in that a concave portion that is recessed toward the wearer side and opened toward the lower end side is provided at a central portion in the width direction of the collar portion. In the shield member according to any one of claims 1 to 4,
The said collar part is a shield member characterized by preventing a flying thing contacting the said wearer's jaw and body. The shield member according to any one of claims 1 to 5,
A cap that protects the wearer's head;
Guide means for guiding the shield member so that the shield member can move between a storage position where the shield member is stored in the cap body and a covering position where the shield member covers the face of the wearer;
The protective cap is characterized in that a gap is formed between the collar portion of the shield member and the collar portion of the cap body in a state where the shield member is located at the storage position.

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