JP7317313B2 - blackout - Google Patents

Description

TECHNICAL FIELD The present invention relates to a light blocking device detachably attached to a full-face mask having eyepieces covering at least both eyes of a wearer.

Conventionally, when workers work in a work environment containing radioactive particulate matter, dust, mist, toxic gas, etc. at concentrations or levels that adversely affect the human body, full-face masks are used as respiratory protective equipment for workers. (See Patent Document 1, for example).

In addition, when workers perform hot work such as welding work, fusing work, work using arc lamps, mercury lamps, infrared lamps, etc., work at nuclear power plants, blast furnaces, heating furnaces, etc. In order to protect the eyes of workers from infrared rays, ultraviolet rays, intense visible rays, and the like, protective surfaces provided with light-shielding lenses are used (see, for example, Patent Document 2).

Japanese Patent Application Laid-Open No. 2002-119607 JP 2015-223597 A

However, when the worker wears the full-face mask disclosed in Patent Document 1 and performs the above work exposed to infrared rays, ultraviolet rays, intense visible light, etc., the protective surface disclosed in Patent Document 2 is used. There is a problem that the workability is lowered because the work is performed while holding it in one hand. In addition, for example, when performing the above work in a narrow space, such as dismantling work, the protection surface disclosed in Patent Document 2 restricts the worker's movement (movement and work), so workability is reduced. There was a problem that the

The present invention has been made in view of such circumstances, and provides a light shielding tool that can appropriately protect the wearer's eyes without reducing the workability of the wearer wearing a full-face mask. intended to

A light shield according to an embodiment of the present invention is
A shading device detachably attached to a full-face mask having eyepieces covering at least both eyes of a wearer,
a light shielding lens that shields light of a predetermined wavelength;
a frame portion that holds the periphery of the light shielding lens;
A light shielding position, which is detachably attached to the periphery of the eyepiece, and is arranged so that the light shielding lens covers the front surface of the eyepiece, and a non-shielding position, which is arranged so that the light shielding lens does not cover the front surface of the eyepiece. and a support portion that supports the frame portion so as to be movable between the light shielding position and the light shielding position.

According to the light shielding device according to the embodiment of the present invention, the support portion is detachably attached to the peripheral edge of the eyepiece, and the light shielding position is arranged so that the light shielding lens covers the front surface of the eyepiece; supports the frame portion movably between a non-blocking position arranged so as not to cover the front surface of the eyepiece.

Therefore, since the light shielding tool can be moved between the light shielding position and the non-light shielding position while being attached to the full face mask, the workability of the wearer wearing the full face mask is not deteriorated. , can adequately protect the eyes of the wearer.

1 shows an example of a light shielding tool 1 and a full-face mask 2 according to an embodiment of the present invention, (a) is a perspective view of a state in which the light shielding tool 1 is not attached to the full-face mask 2, and (b) is a light shielding tool 1 that is a full-face mask. 2 is a perspective view of a state in which it is attached to the device 2. FIG. 1 shows an example of a light shielding device 1 according to an embodiment of the present invention, and is a front view of the light shielding device 1 at a light shielding position P1. FIG. 1 is a side view of the light shielding device 1 at the light shielding position P1, showing an example of the light shielding device 1 according to the embodiment of the present invention. FIG. FIG. 2 shows an example of the light shielding device 1 according to the embodiment of the present invention, and is a front view of the light shielding device 1 at the non-light shielding position P2. FIG. 2 shows an example of the light shielding device 1 according to the embodiment of the present invention, and is a side view of the light shielding device 1 at the non-light shielding position P2. An example of the light shielding lens 11 and the frame portion 12 according to the embodiment of the present invention is shown, (a) is a front view of the light shielding lens 11, (b) is a front view of the frame base portion 120, and (c) is a lens pressing portion 121. It is a front view of. An example of the support part 13 which concerns on embodiment of this invention is shown, (a) is a front view of the support part 13, (b) is a top view of the support part 13, (c) is a side view of the support part 13. FIG. 1 shows an example of a frame support mechanism portion 132 according to an embodiment of the present invention, where (a) is a perspective view of the frame support mechanism portion 132 and (b) is a sectional view of the frame support mechanism portion 132. FIG. FIG. 3 is a diagram showing mixing ratios of resin compositions forming the light shielding lens 11 according to the embodiment of the present invention.

A light shielding device 1 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an example of a light shielding tool 1 and a full face mask 2 according to an embodiment of the present invention, (a) is a perspective view of the light shielding tool 1 not attached to the full face mask 2, and (b) is a light shielding tool. 1 is a perspective view of a state in which 1 is attached to a full-face mask 2. FIG. 2 is a front view of the light shielding device 1 at the light blocking position P1, FIG. 3 is a side view of the light blocking device 1 at the light blocking position P1, FIG. 4 is a front view of the light blocking device 1 at the non-light blocking position P2, and FIG. It is a side view of the light-shielding tool 1 in the non-light-shielding position P2.

6A is a front view of the light shielding lens 11, FIG. 6B is a front view of the frame base portion 120, and FIG. 6C is a front view of the lens pressing portion 121. FIG. 7A is a front view of the support portion 13, FIG. 7B is a plan view of the support portion 13, and FIG. 7C is a side view of the support portion 13. FIG. 8A is a perspective view of the frame support mechanism portion 132, and FIG. 8B is a sectional view of the frame support mechanism portion 132. FIG.

As shown in FIG. 1, the light shielding device 1 is detachably attached to a full-face mask 2 having eyepieces 21 covering at least both eyes of the wearer. For example, when performing hot work such as welding work, fusing work, work using arc lamps, mercury lamps, infrared lamps, etc., work at nuclear power plants, blast furnaces, heating furnaces, etc. It is used to protect workers' eyes from generated infrared rays, ultraviolet rays and intense visible rays.

The full face mask 2 is a so-called full face mask. The full-face mask 2 is used as a respiratory protective device when the work atmosphere in which the above-mentioned various works are performed contains radioactive particulate matter, dust, mist, toxic gas, etc. at concentrations or levels that adversely affect the human body. . The full-face mask 2 may be used as, for example, an air-supplied mask or an automatic respirator.

In addition to the eyepiece 21, the full-face mask 2 has, as a specific configuration, a facepiece 22 formed of a flexible material and attached along the peripheral edge 210 of the eyepiece 21, and integrally formed with the facepiece 22, It comprises a wearing band 23 for fixing the full face mask 2 to the wearer's head, a pair of left and right air intake devices 24L and 24R for supplying the wearer's breath, and an exhaust device 25 for exhausting the wearer's breath.

The eyepiece 21 is made of a transparent and hard synthetic resin, and has a width to ensure the field of view of the wearer, and is formed in a curved shape according to the shape of the face. In this embodiment, the eyepiece 21 is of a monocular type, but may be of a binocular type.

The facepiece 22 includes a frame-shaped eye frame 220 that covers the peripheral edge 210 of the eyepiece 21 and fixes the eyepiece 21 in an airtight state. The intake devices 24L and 24R are provided with filters (not shown) and the like for removing toxic gas, dust, and the like. The exhaust device 25 includes a check valve (not shown) or the like that prevents external air from flowing into the inside of the full-face mask 2 .

The light shielding tool 1 is detachably attached to a light shielding lens 11 that shields light of a predetermined wavelength, a frame portion 12 that holds a peripheral edge 110 of the light shielding lens 11 , and a peripheral edge 210 of the eyepiece 21 . A light blocking position P1 (see FIGS. 2 and 3) where the lens 11 is arranged so as to cover the front surface 211 of the eyepiece 21, and a non-light blocking position P2 (see FIG. 4) where the light blocking lens 11 is arranged so as not to cover the front surface 211 of the eyepiece 21. , see FIG. 5), and a support portion 13 that supports the frame portion 12 movably.

2 and 3, the light shielding position P1 is a position where the frame portion 12 is arranged in front of the eyepiece 21, and the wearer visually recognizes the surroundings through the light shielding lens 11. On the other hand, as shown in FIGS. 4 and 5, the non-light-shielding position P2 is a position where the frame portion 12 is arranged so as to be flipped up above the eyepiece 21. Also, look at your surroundings.

The light shielding lens 11 is made of a synthetic resin having a property of shielding light of a predetermined wavelength, such as infrared rays, ultraviolet rays, and visible rays. The details of the light shielding lens 11 will be described later.

The light shielding lens 11 has a width approximately equal to that of the eyepiece 21, and when the frame portion 12 is placed at the light shielding position P1, the light shielding lens 11 covers about two-thirds of the lower side of the eyepiece 21 and extends along the front surface 211 of the eyepiece 21. 2, it is formed into a curved surface having a curvature similar to that of the eyepiece 21 .

The frame portion 12 is formed in a plate shape using a metal material such as stainless steel or aluminum, and is curved along the outline of the full-surface mask 2 .

As a specific configuration, the frame portion 12 includes a frame base portion 120 disposed on one side of the front surface 111 side and the rear surface 112 side of the light shielding lens 11 along the peripheral edge 110 of the light shielding lens 11, is disposed on the other side opposite to the frame base portion 120, and holds the light shielding lens 11 in a replaceable manner by sandwiching the peripheral edge 110 of the light shielding lens 11 between itself and the frame base portion 120; A pair of left and right grips 122L and 122R are arranged at a predetermined distance from the lower portion in the left-right direction of the frame portion 12 and extend downward from the frame portion 12. As shown in FIG.

In this embodiment, the frame base portion 120 is arranged on the rear surface 112 side, the lens pressing portion 121 is arranged on the front surface 111 side, and the grip portions 122L and 122R are formed integrally with the frame base portion 120. .

As shown in FIG. 6B, the frame base portion 120 has an opening 120a formed one size smaller than the peripheral edge 110 of the light shielding lens 11, and a plurality of screw holes 120b. As shown in FIG. 6C, the lens pressing portion 121 has an opening 121a formed one size smaller than the peripheral edge 110 of the light shielding lens 11, and a plurality of screw holes 121b.

The frame base portion 120 and the lens pressing portion 121 sandwich the light shielding lens 11 so as to close the openings 120a and 121a, respectively, and the lens fixing screws 140 are inserted through the screw holes 120b and 121b. The light shielding lens 11 is attached to the frame portion 12 by tightening and fixing. Therefore, when the light shielding lens 11 is damaged or soiled, the light shielding lens 11 can be replaced by removing the lens fixing screw 140 .

The gripping portions 122L and 122R are configured to be grippable by the wearer wearing work gloves, for example. When the frame portion 12 is arranged at the light shielding position P1, the left grip portion 122L is arranged between the left intake device 24L and the exhaust device 25, and the right grip portion 122R is arranged between the right intake device 24R and the exhaust device. It is arranged between the device 25 .

The supporting portion 13 is formed in a plate shape using a metal material such as stainless steel or aluminum, and is curved along the outline of the full-surface mask 2 .

7 and 8, the support portion 13 has a specific structure, a support base portion 130 arranged on the upper portion of the eyepiece 21 along the front surface 211 and the peripheral edge 210 of the eyepiece 21; A plurality of mask attachment portions 131 provided on the upper side and on the left and right sides of the support base portion 130 and detachably attached to the peripheral edge 210 of the eyepiece 21; A frame support mechanism portion 132 that supports the frame portion 12 so as to be rotatable about a rotation axis O2 parallel to the left-right direction of the frame support mechanism portion 132 is provided. In addition, in this embodiment, the support portion 13 includes a total of three mask attachment portions 131, one on the upper side and one on each of the left and right sides.

The support base portion 130 has a width approximately equal to that of the eyepiece 21, and covers approximately one-third of the upper side of the eyepiece 21 so as not to block the wearer's field of vision when the frame portion 12 is placed at the light shielding position P1. Along with the front surface 211 of the eyepiece 21 , it is formed into a curved surface having a curvature similar to that of the eyepiece 21 .

The mask mounting portion 131 is formed in a hook shape by, for example, bending processing in accordance with the shape of the eye frame 220, and has a screw hole 131a. The mask attachment portion 131 is attached to the eye frame 220 of the full-face mask 2 by inserting the light blocking device fixing screw 141 into the screw hole 131a and tightening the mask attachment portion 131 while being hooked on the eye frame 220. . Therefore, when either the light shielding device 1 or the full-face mask 2 is to be replaced, the replacement can be performed by removing the light shielding device fixing screw 141 .

The frame support mechanism portion 132 includes a regular polygonal columnar member 134 fixed to the support base portion 130 via a bracket 133 so that the axial direction is arranged along the rotation axis O2, and a regular polygonal columnar member 134 that rotates about the rotation axis O2. A rotating member 135 which is attached to the regular polygonal columnar member 134 in a possible state and is fixed to the frame portion 12, and a pressing member attachment hole of the rotating member 135 so as to press the side surface 134a of the regular polygonal columnar member 134. and a pressing member 136 attached to 135a.

The bracket 133 is bent into a dogleg shape and formed integrally with the mask mounting portion 131 provided on the upper side. The screw hole 133a of the bracket 133 is fixed to the support base portion 130 by a bracket fixing screw 143A.

The regular polygonal columnar member 134 has a regular polygonal bottom surface and cross-sectional shape. In this embodiment, the regular polygonal prismatic member 134 is a regular hexagonal prismatic member, but any regular polygonal prismatic member such as a regular octagonal prismatic member may be used.

The regular polygonal columnar member 134 has six rectangular side surfaces 134a and screw holes 134b axially formed in the left and right bottom surfaces. The regular polygonal columnar member 134 is fixed to the bracket 133 with a bracket fixing screw 143B.

The rotating member 135 has a through hole 135b in a portion where both left and right sides are bent into an L shape. By doing so, it is attached to the regular polygonal columnar member 134 so as to be rotatable about the rotation axis O2. The screw hole 135c of the rotating member 135 is fixed to the frame portion 12 (the screw hole 120c of the frame base portion 120 and the screw hole 121c of the lens pressing portion 121) by a frame fixing screw 142. As shown in FIG.

The pressing member 136 is composed of, for example, two plungers arranged side by side in the horizontal direction, and includes a ball member 136a and a coil spring 136b that presses the ball member 136a. The pressing member 136 presses the side surface 134 a of the regular polygonal columnar member 134 radially inward of the regular polygonal columnar member 134 .

When an external force F acting in a direction to rotate the rotating member 135 about the rotation axis O2 and being larger than the pressing force of the pressing member 136 acts, the pressing member 136 moves toward the corner portion existing between the side surfaces 134a. By passing through 134 c and moving to the adjacent side surface 134 a , the rotating member 135 rotates across the adjacent side surfaces 134 a of the regular polygonal columnar member 134 .

In this embodiment, since the regular polygonal columnar member 134 has a regular hexagonal columnar shape, the pressing member 136 rotates by 60 degrees, and the distance between the light blocking position P1 and the non-light blocking position P2 is 120 degrees. is configured to produce an angular difference of

(Light shielding lens 11)
The light-shielding lens 11 is formed of a resin composition in which squid ink, an infrared-cutting agent, and an ultraviolet-cutting agent are dispersed in a translucent thermosetting resin as a base material using a dispersant.

A thermosetting resin itself is transparent or translucent and has translucency. Thermosetting resins are, for example, CR39 (allyl diglycol carbonate), epoxy resins, polyurethane resins, and the like.

Squid ink is a monodisperse pigment containing dark brown pigment particles obtained from squid. Squid ink shields light well in the visible range (low transmittance). Squid ink is obtained by purifying the raw material ink obtained from red squid, cuttlefish, etc., to obtain monodisperse spheroids having an average particle size of about 300 nm and a particle size range of about 100 to 500 nm. It was obtained as a concentrated solution of about 20 wt% (weight percent). Note that the squid ink does not have to be concentrated. Moreover, it is preferable that the concentration of squid ink is 10 ppm or more in the final light-shielding lens.

Infrared cut agents are materials that shield light with wavelengths in the infrared region (780 nm to 2 mm), such as indium tin oxide (ITO)-based materials, antimony tin oxide (ATO)-based materials, cyanine-based materials, and diimmonium-based materials. etc. are used. The infrared cut agent may be a powdery material or a liquid material.

The UV cut agent is a material that blocks light with a wavelength in the ultraviolet region (100 nm to 400 nm), such as benzotriazole-based materials, benzophenone-based materials, and triazine-based materials. A powdery material or a liquid material may be used as the ultraviolet blocking agent.

Squid ink is poorly water-soluble (insoluble), and the particle size of the pigment is very small. Also, when a liquid material is used as the infrared-cutting agent and the ultraviolet-cutting agent, it has the property of being difficult to disperse in the monomer of the thermosetting resin, like squid ink. Therefore, it is preferable to add squid ink or a liquid infrared cut agent and ultraviolet cut agent in a state in which a dispersant is mixed with a thermosetting resin monomer.

As the dispersant, a polymeric pigment dispersant (for example, Ajinomoto Fine-Techno Co., Inc. Ajisper) or a solution obtained by dissolving this in a solvent (for example, methyl ethyl ketone (MEK)) is used. To manufacture a light-shielding lens having uniform black color and constant transmittance by suppressing aggregation and precipitation of a squid ink pigment in a transparent base material of the light-shielding lens by using a dispersant. can. Further, by using a dispersant, the liquid infrared cut agent and ultraviolet cut agent can be uniformly dispersed in the monomer of the thermosetting resin.

The polymerization initiator is, for example, a peroxydicarbonate-based peroxide such as diisopropyl peroxydicarbonate.

The resin composition is produced by blending squid ink, an infrared-cutting agent, an ultraviolet-cutting agent, a dispersant, a polymerization initiator, and the like with a thermosetting resin monomer. Then, the light-shielding lens 11 is manufactured by injecting the resin composition into a mold serving as a formwork and thermally curing it. When the internal shape of the mold matches the final shape of the light-shielding lens 11, the light-shielding lens 11 is completed by removing it from the mold. The light shielding lens 11 is completed by performing the steps in a systematic manner.

FIG. 9 is a diagram showing mixing ratios of the resin composition forming the light shielding lens 11 according to the embodiment of the present invention. In addition, below, the case where CR39 is used is demonstrated as an example of a thermosetting resin.

The blending ratio of each material is shown in FIG. 89.2% CR39 monomer, 1.3% squid ink, 1.0% infrared cut agent, 0.5% ultraviolet cut agent, and 8.0% dispersant.

When blended according to the above blending ratio so that the total mass of the resin composition is 150 g, the content of each material is 133.8 g of CR39 monomer, 1.95 g of squid ink, 1.5 g of infrared cut agent, and UV cut 0.75 g of agent and 12 g of dispersant. In addition, the polymerization initiator is 18.9 g. The preferable range of the content of each material is, for example, 1.8 g or more for squid ink, 1.5 to 4.5 g for infrared cut agent, and 0.375 to 4.5 g for ultraviolet cut agent. , in the range of 7.5 to 15 g of dispersant.

The content of each material is 1.45 g of squid ink, 1.12 g of infrared ray blocking agent, 0.56 g of ultraviolet ray blocking agent, and 8.9 g of dispersing agent with respect to 100 g (parts by mass) of CR39 monomer. In addition, the polymerization initiator is 14.1 g. In addition, the preferable range of the content of each material is, for example, 1.34 g or more of squid ink, 1.12 to 3.36 g of infrared cut agent, and ultraviolet rays per 100 g (parts by mass) of CR39 monomer. It is preferable that the amount of the cutting agent is within the range of 0.28 to 3.36 g and the amount of the dispersing agent is within the range of 5.6 to 11.2 g.

The light shielding device 1 having the above structure is used by being attached to the full-face mask 2 shown in FIG. 1(a). Specifically, as shown in FIG. 1(b), the supporting base portion 130 of the light shielding device 1 is arranged so as to cover about one-third of the upper side of the eyepiece 21 of the full-face mask 2. The mounting portions 131 (three in this embodiment (see FIG. 7)) are hooked on the eye frame 220 covering the peripheral edge 210 of the eyepiece 21, and are tightened and fixed with the light shield fixing screws 141. is attached to the full-face mask 2 .

At this time, when the frame portion 12 is at the light shielding position P1 (see FIGS. 2 and 3), the light shielding lens 11 held by the frame portion 12 is arranged to cover the front surface 211 of the eyepiece 21 . Therefore, even in a work environment where the wearer wearing the full-face mask 2 is exposed to infrared rays, ultraviolet rays, and strong visible light rays, the infrared rays, ultraviolet rays, and intense visible rays may cause the wearer to wear the full-face mask 2. The light is shielded by the light shielding lens 11 so that it does not reach the eyes of the wearer. In addition, since the light shielding device 1 is attached to the full face mask 2 and has an outer shape that follows the curved surface of the full face mask 2, the movement (movement and work) of the wearer is not hindered even in a narrow environment. It does not reduce the workability of the operator.

Also, in a situation where the wearer is not exposed to infrared rays, ultraviolet rays, intense visible rays, or the like, the wearer performs an operation such as lifting one of the grips 122L, 122R with the left hand or the right hand. As a result, the rotating member 135 of the frame support mechanism portion 132 rotates about the rotation axis O2, and an external force F larger than the pressing force of the pressing member 136 acts. As shown in (b), the regular polygonal columnar member 134 rotates so as to straddle the adjacent side surfaces 134a twice. As a result, the rotating member 135 rotates 120 degrees, the frame portion 12 moves from the light shielding position P1 to the non-light shielding position P2 (see FIGS. 4 and 5), and the pressing member 136 presses the side surface 134a. Thus, the frame portion 12 is held at the non-light-shielding position P2. When the frame portion 12 is at the non-light-shielding position P2, the light-shielding lens 11 is arranged in a flipped-up state so as not to cover the front surface 211 of the eyepiece 21. Visually recognize the surrounding situation through.

As described above, according to the light shielding device 1 according to the embodiment of the present invention, the support part 13 is detachably attached to the peripheral edge 210 of the eyepiece 21, and the light shielding lens 11 covers the front surface 211 of the eyepiece 21. The frame portion 12 is movably supported between a light shielding position P1 arranged as above and a non-light shielding position P2 arranged so that the light shielding lens 11 does not cover the front surface 211 of the eyepiece 21 .

Therefore, with the light shielding device 1 attached to the full-face mask 2, the wearer wearing the full-face mask 2 can move the frame portion 12 between the light-shielding position P1 and the non-light-shielding position P2. Therefore, the wearer's eyes can be appropriately protected without reducing the workability of the wearer wearing the full-face mask 2 .

The support base portion 130 is attached to the full-face mask 2 by a plurality of mask attachment portions 131 provided on the upper side and on the left and right sides of the support base portion 130. Frames provided on the left and right center lines of the support base portion 130 The support mechanism portion 132 supports the frame portion 12 so as to be rotatable about a rotation axis O2 parallel to the left-right direction. Therefore, since the center of gravity of the plurality of mask attachment portions 131 and the frame support mechanism portion 132 are positioned on the left and right center lines O1, the support base portion 130 feels stable when attached to the full-face mask 2, and A sense of stability when the frame portion 12 is rotated with respect to the support base portion 130 can be improved.

Further, the frame support mechanism portion 132 includes a regular polygonal columnar member 134 fixed to the support base portion 130 so that the axial direction is arranged along the rotation axis O2, and a state in which the frame support mechanism portion 132 is rotatable about the rotation axis O2. and a rotating member 135 attached to the regular polygonal columnar member 134 and fixed to the frame portion 12, and a pressing member 136 attached to the rotating member 135 so as to press the side surface 134a of the regular polygonal columnar member 134. When an external force F, which is a force in a direction to rotate the rotating member 135 about the rotation axis O2 and is larger than the pressing force of the pressing member 136, acts on the rotating member 135, the regular polygonal columnar member 134 rotates. , so as to straddle the adjacent side surfaces 134a twice. Therefore, a structure in which the frame portion 12 is flipped up with respect to the support portion 13 and appropriately holds the flipped-up state can be realized with a simple configuration.

Further, the frame portion 12 holds the light shielding lens 11 replaceably by sandwiching the peripheral edge 110 of the light shielding lens 11 between the frame base portion 120 and the lens pressing portion 121 . Therefore, when the light shielding lens 11 is damaged or soiled, the light shielding lens 11 can be easily replaced.

In addition, the frame portion 12 is arranged at a predetermined interval in the left-right direction of the frame portion 12 with respect to the lower portion of the frame portion 12, and has grip portions 122L and 122R extending downward from the frame portion 12. Prepare. Therefore, even when the wearer wears work gloves, for example, the frame portion 12 can be easily moved between the light shielding position P1 and the non-light shielding position P2 by operating the grips 122L and 122R. can be done.

The light-shielding lens 11 is made of a resin composition in which squid ink, an infrared-cutting agent, and an ultraviolet-cutting agent are dispersed in a light-blocking thermosetting resin using a dispersant. The content of the squid ink is 1.34 parts by mass or more, and the content of the infrared cut agent is in the range of 1.12 to 3.36 parts by mass with respect to 100 parts by mass of the monomer of the curable resin. , the content of the UV cut agent is in the range of 0.28 to 3.36 parts by mass, and the content of the dispersant is in the range of 5.6 to 11.2 parts by mass. Therefore, the light shielding lens 11 can adequately shield infrared rays, ultraviolet rays and intense visible rays using environmentally friendly materials.

(Other embodiments)
Although the above-described embodiment has been described as one embodiment of the present invention, the present invention is not limited to the above-described embodiment, and can be appropriately modified without departing from the technical idea of the present invention.

For example, in the above-described embodiment, the support part 13 is provided with a total of three mask attachment parts 131, one on the upper side and one on each of the left and right sides. A plurality of them may be provided on both the left and right sides. Further, the mask attachment part 131 is configured to be detachably attached to the support base part 130 as a component separate from the support base part 130, so that the light shielding tool 1 can be attached to the full-face mask 2 having different sizes and shapes. Sometimes, the mask attachment portion 131 may be attached to the support base portion 130 according to the size and shape of the full-face mask 2 .

1... light shielding tool,
11... light shielding lens,
110... peripheral edge, 111... front surface, 112... rear surface,
12... Frame part,
120...Frame base portion, 120a...Opening portion, 120b, 120c...Screw hole,
121...Lens holding part, 121a...Opening part, 121b, 121c...Screw hole,
122L, 122R... grasping portions,
13 ... support part,
130... support base portion,
131... mask mounting part, 131a... screw hole,
132 ... frame support mechanism,
133...Bracket, 133a...Screw hole,
134...Regular polygonal columnar member 134a...Side surface 134b...Screw hole 134c...Corner part
DESCRIPTION OF SYMBOLS 135... Rotating member 135a... Pressing member attachment hole 135b... Through hole 135c... Screw hole 136... Pressing member 136a... Ball member 136b... Coil spring,
140... lens fixing screw, 141... shade fixing screw, 142... frame fixing screw,
143A, 143B... Bracket fixing screws, 144... Rotating member fixing screws,
2... full face mask,
21... eyepiece, 210... peripheral edge, 211... front surface,
22... face piece, 220... eye frame,
23... worn band, 24L... intake system, 24R... intake system, 25... exhaust system,
F... external force, O1... center line, O2... rotating shaft, P1... light shielding position, P2... non-light shielding position

Claims (6)

A shading device detachably attached to a full-face mask having eyepieces covering at least both eyes of a wearer,
a light shielding lens that shields light of a predetermined wavelength;
a frame portion that holds the periphery of the light shielding lens;
A light shielding position, which is detachably attached to the periphery of the eyepiece, and is arranged so that the light shielding lens covers the front surface of the eyepiece, and a non-shielding position, which is arranged so that the light shielding lens does not cover the front surface of the eyepiece. a support portion that supports the frame portion so as to be movable between a light shielding position;
A light shielding tool characterized by: The support part is
a support base disposed on top of the eyepiece along the front surface and peripheral edge of the eyepiece;
a plurality of mask attachment portions provided on the upper side and on both left and right sides of the support base portion and detachably attached to the peripheral edge of the eyepiece;
a frame support mechanism provided on the left-right center line of the support base and supporting the frame so as to be rotatable about a rotation axis parallel to the left-right direction of the support base;
The light shielding device according to claim 1, characterized in that: The frame support mechanism section includes:
a regular polygonal columnar member fixed to the support base so that the axial direction is arranged along the rotation axis;
a rotating member attached to the regular polygonal columnar member in a state rotatable about the rotating shaft and fixed to the frame;
a pressing member attached to the rotating member so as to press the side surface of the regular polygonal columnar member;
The rotating member is
When an external force acting in the direction of rotating the rotating member about the rotating shaft and being larger than the pressing force of the pressing member acts, the regular polygonal columnar member is arranged to straddle the adjacent side surfaces. Rotate by
The light shielding device according to claim 2, characterized in that: The frame portion
a frame base portion disposed on one side of the front side and the rear side of the light shielding lens along the periphery of the light shielding lens;
a lens holding part disposed on the other side opposite to the one side and holding the light shielding lens exchangeably by sandwiching the peripheral edge of the light shielding lens between itself and the frame base part;
The light shielding device according to any one of claims 1 to 3, characterized in that: The frame portion
a holding portion disposed at a predetermined interval in the left-right direction of the frame portion with respect to the lower portion of the frame portion and extending downward from the frame portion;
The light shielding device according to any one of claims 1 to 4, characterized in that: The light shielding lens is
Consisting of a resin composition in which squid ink, an infrared cut agent, and an ultraviolet cut agent are dispersed in a translucent thermosetting resin using a dispersant,
The resin composition contains, with respect to 100 parts by mass of the thermosetting resin monomer,
The content of the squid ink is 1.34 parts by mass or more,
The content of the infrared cut agent is in the range of 1.12 to 3.36 parts by mass,
The content of the UV cut agent is in the range of 0.28 to 3.36 parts by mass,
The content of the dispersant is in the range of 5.6 to 11.2 parts by mass,
The light shielding device according to any one of claims 1 to 5, characterized in that:

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