Fire helmet

Abstract

To provide a firefighting helmet and a firefighting helmet which enable an interior part to be provided inside the helmet body without opening a hole in the outer shell of the helmet body. [Solution] The helmet 1 comprises a helmet body 10 having an outer shell 10a, and an interior fitting provided on the inner surface 10b of the helmet body 10, a joint portion integral with the helmet body 10 is formed on the inner surface 10b of the helmet body 10, the interior fitting is joined to the joint portion, and the helmet body 10 has a protective portion 14 molded integrally with the outer shell 10a that continues from one side of the helmet body 10, via the rear surface of the helmet body 10, to the other side of the helmet body 10.

Description

[Technical Field]

[0001] This device is a helmet with an interior part provided inside the helmet body. Fire helmet Regarding. [Background technology]

[0002] Conventionally, firefighting helmets have been proposed that have interior fittings such as hammocks inside the helmet body (see, for example, Patent Document 1). Furthermore, conventional firefighting helmets have mainly been made of thermosetting resins in order to ensure heat resistance (see, for example, Patent Document 2). The above-mentioned firefighting helmets are configured such that holes are opened through the outer shell of the helmet body and rivets are inserted into the holes to fit the interior fittings. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 58-75715 [Patent Document 2] Japanese Patent Application Laid-Open No. 2000-027021 Summary of the Invention [Problem to be solved by the invention]

[0004] On the other hand, there has been a demand for a fire helmet that can be fitted with an interior material while still meeting the electrical resistance test standard (ISO / DIS 11999-5). The present invention has been made in consideration of the above-mentioned problem, and it is possible to fit an interior material inside the helmet without opening a hole in the outer shell of the helmet. Fire helmet The purpose is to provide. [Means for solving the problem]

[0005] In order to solve the above problems, the present invention provides the following: Fire helmet was configured.

[0006] (1) A firefighting helmet comprising a cap body having an outer shell and an interior fitting provided on the inner peripheral surface of the cap body, wherein a joint portion integral with the cap body is formed on the inner peripheral surface of the cap body, the interior fitting is joined to the joint portion, and the cap body has a protective portion that continues from one side of the cap body, via the rear surface of the cap body, to the other side of the cap body, molded integrally with the outer shell.

[0007] (2) The fire helmet according to (1), wherein the interior accessories include at least one of a face shield, a hammock, and a headband.

[0008] (3) A fire helmet as described in (1), wherein the outer shell of the cap body does not have a hole communicating with the inner surface of the cap body.

[0009] (4) The fire helmet according to (1), wherein the interior part is provided with a face shield, and the face shield is rotatably attached to the helmet body.

[0010] (5) A fire helmet as described in (4), wherein the face shield is movable between a use state in which it is exposed to the outside of the helmet body and a non-use state in which it is stored inside the helmet body.

[0011] (6) A fire helmet according to any one of (1) to (5), wherein the shell is formed from a thermoplastic resin.

[0012] (7) A fire helmet according to any one of (1) to (5), wherein the shell is formed from a PEI resin.

[0013] (8) A firefighting helmet according to any one of (1) to (5), wherein when the helmet body is subjected to a conductive head mannequin test as specified in ISO / DIS 11999-5, the leakage current is less than 3.0 mA.

[0014] (9) A firefighting helmet according to any one of (1) to (5), wherein when the helmet body is subjected to a wet helmet insulation test specified in ISO / DIS 11999-5, the leakage current is less than 3.0 mA. [Effects of the Invention]

[0015] This invention Fire helmet According to this, it is possible to provide an interior part inside the cap body without opening a hole in the outer shell of the cap body. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 2 is a bottom perspective view showing the shell of the fire helmet according to the embodiment. [Figure 2] FIG. 2 is a bottom view showing the shell of the fire helmet according to the embodiment. [Figure 3] FIG. 4 is a bottom perspective view showing the assembly configuration of the face shield to the cap body. [Figure 4] FIG. 2 is a bottom perspective view showing the face shield attached to the cap body. [Figure 5] FIG. 2 is a side cross-sectional view showing the face shield attached to the cap body. [Figure 6] FIG. 10 is a side cross-sectional view showing the state in which the adapter is attached to the cap body. [Figure 7] FIG. 10 is a side cross-sectional view showing the state in which the hammock is assembled to the cap body. [Figure 8] FIG. 10 is a side cross-sectional view showing a state in which the headband is attached to the cap body. DETAILED DESCRIPTION OF THE INVENTION

[0017] Next, the schematic configuration of a fire helmet (hereinafter simply referred to as "helmet") 1 according to one embodiment of the present invention will be described with reference to Figures 1 to 8. In this embodiment, the direction of the helmet 1 is determined based on the direction as seen by the user of the helmet 1.

[0018] As shown in Fig. 8, the helmet 1 according to this embodiment is provided with interior fittings on the inner peripheral surface 10b of the shell 10 (see Figs. 1 and 2), including a face shield 2, a connecting member 4, a hammock 5, and a headband 6. It is not necessary for the helmet 1 to be provided with all of the above interior fittings, and it is sufficient for the helmet 1 to be provided with at least one of these interior fittings.

[0019] The hammock 5 and headband 6 are configured to be attached to the inner peripheral surface 10b of the cap body 10 via connecting members 4. An impact absorbing liner 7 is housed inside the cap body 10 along the inner peripheral surface 10b. The impact absorbing liner 7 is supported by the connecting members 4 fixed to the cap body 10 as shown in FIG.

[0020] As shown in Fig. 1, the cap body 10 has an outer shell 10a on its outer surface. The cap body 10 includes a cap body main body 11 that covers the user's head, a peak portion 13 that continuously projects forward from the front side of the cap body 10, and a protective portion 14 that projects downward from a portion extending from the center of each of the left and right sides of the cap body 10 to the rear. In this embodiment, the protective portion 14 is molded integrally with the outer shell 10a and extends continuously from one side of the cap body 10, passing through the rear surface, to the other side of the cap body 10. The protective portion 14 is provided to protect the user's ears and the back of the head from flying objects, sparks, etc.

[0021] Three connecting member joints 15 for attaching connecting members 4, which are interior accessories, are provided integrally with the cap body 10 on the inner peripheral surface 10b of the cap body 10 and protrude inward. In this embodiment, the connecting member joints 15 are provided in three locations on the inner peripheral surface 10b: the centers of the left and right side surfaces and the center of the rear surface; however, the locations and number of connecting member joints 15 are not limited to these. In this embodiment, the connecting member joints 15 are molded integrally with the cap body 10. Note that it is sufficient for the connecting member joints 15 to be formed integrally with the cap body 10; specifically, the connecting member joints 15 may be welded to the cap body 10 or adhered to the cap body 10 with an adhesive.

[0022] In this embodiment, since a movable face shield 2 is provided as described below, the connecting member joint 15 is not provided on the front surface of the inner peripheral surface 10b of the cap body 10, but if such a face shield 2 is not provided, the connecting member joint 15 can be provided on the front surface of the inner peripheral surface 10b. The connecting member joint 15 has a tubular structure that protrudes toward the inside of the cap body 10 and is open at its tip.

[0023] A connecting member 4 is provided at a connecting member joint 15 on the inner peripheral surface 10b of the cap body 10. Specifically, as shown in Fig. 6, a connecting hole 41 opened in the connecting member 4 is engaged with the connecting member joint 15, thereby fixing the connecting member 4 to the connecting member joint 15. From the viewpoint of stably fixing the connecting member 4, a flange portion 17 is provided on the lower side of the tip of the cylindrical opening of the connecting member joint 15. Furthermore, the connecting member 4 can be fixed more reliably by providing a female threaded hole or an insert nut in the cylindrical inner hollow portion, or by inserting or adhesively fixing a fixing pin.

[0024] 2, four adapter joints 16 for attaching the face shield 2, which is an interior accessory, via an adapter 3 are integrally provided on the inner peripheral surface 10b of the cap body 10. In this embodiment, the adapter joints 16 for attaching the face shield 2 protrude from the inside of the protective part 14.

[0025] The face shield 2 is movable and rotatable around a support shaft (a rotating shaft 31, described later) along the front wall surface of the cap body main body 11. The adapter joints 16 may be provided at positions where the adapter 3 can be attached to enable such rotation. In this embodiment, a total of four adapter joints 16 are provided, two on each side, at symmetrical positions on the inside left and right walls of the protective part 14, but the locations and number of adapter joints 16 are not limited to this.

[0026] The adapter joint 16 has a cylindrical structure that protrudes toward the inside of the cap body 10 and is open at its tip. Meanwhile, two engagement holes 30 are formed on the outer surface of the adapter 3 at both ends in the front-to-rear direction. As shown in FIG. 3 , the adapter 3 is fixed to the inner peripheral surface 10b of the cap body 10 by fitting and engaging the adapter joint 16 into the engagement holes 30 of the adapter 3. Note that the engagement holes 30 are through holes, and as with the connecting member 4 described above, the adapter 3 can be more securely fixed by providing a female threaded hole or an insert nut, or by inserting or adhesively fixing a fixing pin.

[0027] 3, a rotating shaft 31, a guide pin 32, and a restricting protrusion 33 are formed on the inner surface of the adapter 3, and these protrude toward the inside of the cap body 10. A through hole is formed in the adapter 3, and a rod-shaped locking body 34 is provided along the through hole.

[0028] 3 and 4, support shaft portions 20 having recessed portions on the outside are formed on both the left and right sides of the face shield 2. A guide hole 21 that penetrates the face shield 2 is formed in front of the support shaft portions 20 in the face shield 2. A notched locking portion 22 is formed in the rear of the support shaft portions 20 in the face shield 2.

[0029] A notched restriction portion 23 is formed in front of the guide hole 21 in the face shield 2. A shield visor portion 24 is formed in the front of the face shield 2 so as to correspond to the visor portion 13 of the cap body 10 when the face shield 2 is stored in the cap body 10.

[0030] When assembling the face shield 2 to the adapter 3, the rotating shaft 31 is inserted into the support shaft portion 20 as shown in Fig. 3. As a result, as shown by the two-dot chain line in Fig. 5, the face shield 2 is assembled so as to be rotatable about the rotating shaft 31 of the adapter 3 provided at the adapter joint portion 16. At this time, the guide pin 32 is inserted into the guide hole 21 as shown in Fig. 4, so that the rotational displacement of the face shield 2 is guided.

[0031] 5, the face shield 2 can be displaced between a use state in which it is exposed to the outside of the cap body 10 (see the two-dot chain line in FIG. 5) and a non-use state in which it is housed inside the cap body 10 (see the solid line in FIG. 5). In other words, by rotating and displacing the face shield 2 in the vertical direction, it can be transitioned between a use state in which it covers the face of the user and a non-use state in which it is housed in the cap body 10.

[0032] 5, when the face shield 2 is stored in the cap body 10 and in an unused state, the tip of the locking body 34 is inserted into the locking portion 22. This stably maintains the posture of the face shield 2 in an unused state. Attachment and detachment of the locking body 34 to the locking portion 22 is performed by a locking mechanism that uses elastic deformation of the locking body 34.

[0033] 5, when the face shield 2 is rotated to the in-use state so as to cover the face of the user, the restricting protrusion 33 is inserted into the restricting portion 23. This makes it possible to stably fix the face shield 2 at a predetermined stop position.

[0034] There are no limitations on the shape or material of the face shield 2, as long as it can protect the user's face, ensure transparency of the portion protecting the user's face, and can be held to the hat body 2. For reasons of ensuring rigidity and ensuring visibility, it is desirable to use PC (polycarbonate), acrylic resin, or PEI (polyetherimide) as the material for the face shield 2.

[0035] As shown in Figure 6, the annular connecting member 4 has connecting holes 41 at three locations corresponding to the connecting member joints 15 and the flanges 17. The connecting member 4 has hammock attachment holes 42 at locations where the hammock 5 is attached.

[0036] As shown in FIG. 7 , the hammock 5 is formed with a plurality of linking portions 51 (four on each side in this embodiment) extending radially from the center. Linking holes 52 are opened at the tips of the linking portions 51, and the linking holes 52 and the hammock attachment holes 42 are connected via fastening members 53. Headband joining portions 54, each having a joining hole 54a, are formed on the side of each linking portion 51 and extend laterally. The shape of the fastening members 53 is not limited as long as they link the linking holes 52 and the hammock attachment holes 42 and can fix the hammock 5 and the connecting member 4 by sliding the linking holes 52 relative to the fastening members 53. Examples of the shape of the fastening members 53 include pins, rivets, and bolts, but the configuration of the fastening members 53 is not limited to these.

[0037] 8, the headband 6 is attached to the hammock 5 via the attachment hole 54a of the headband attachment part 54. The headband 6 is formed in a ring shape and has an adjustment part 61 at the rear. The headband 6 has an attachment piece 62, which is attached to the attachment hole 54a of the headband attachment part 54. In addition, ear straps and a chin strap (not shown) are connected to the headband 6.

[0038] As described above, a plurality of connecting member joints 15 and adapter joints 16 for attaching the interior accessories, namely the face shield 2, the connecting member 4, the hammock 5, and the headband 6, are formed integrally with the helmet body 10 and face inward on the inner peripheral surface 10b of the helmet body 10. In this way, with the helmet 1 according to this embodiment, it is possible to provide interior accessories inside the helmet body 10 without opening holes in the outer shell 10a of the helmet body 10.

[0039] In this way, in this embodiment, the outer shell 10a of the shell 10 does not need to have rivet holes or notches for attaching interior fittings to the inner peripheral surface 10b. There are no restrictions on the shape of the shell 10 of the helmet 1, and from the standpoint of ensuring insulation, any shape may be used as long as no holes or notches are provided that communicate from the outer shell 10a of the shell 10 to the inner peripheral surface 10b.

[0040] The connecting member joint 15 and the adapter joint 16 provided on the cap body 10 may be attached by any method, such as by integral molding with the cap body 10, by inserting a screw bit, by bonding with an adhesive, or by bonding with a hook-and-loop fastener, as long as they are not configured to have holes that directly communicate with the cap body 10. The shape of the connecting member joint 15 and the adapter joint 16 is also not limited, and they may be configured to be detachable, such as by protrusion, groove, or hook shape, as long as they can engage with and hold the mating object. However, a protrusion shape is desirable because it has a simple and compact structure, is advantageous in terms of the weight of the cap body 10, and has a small area where defects such as sink marks will occur on the design surface during injection molding. The location of the connecting member joint 15 and the adapter joint 16 is also not limited, and they can be attached to any location on the cap body 10.

[0041] The cap body 10 is an injection-molded body made from a molding material described below. A plurality of connecting member joints 15 and an adapter joint 16 are integrally formed with the cap body 10. Therefore, unlike conventional firefighting helmets that have through holes for fitting engaging parts, the cap body 10 does not have through holes, as shown in Figures 1 and 2. This makes it possible to conduct voltage resistance tests specified in ISO standards.

[0042] The material of the interior parts applied in this embodiment can be appropriately selected from those used in helmets for firefighting, etc. Meanwhile, the molding material constituting the cap body 10 will be described in detail below.

[0043] The molding material that forms the shell 10 has a resin component that is a thermoplastic resin (polyetherimide (PEI) in this embodiment). In this embodiment, by using a thermoplastic resin as the material for the shell 10 instead of a conventional thermosetting resin, it is possible to reduce the weight.

[0044] The thermoplastic resin used for the cap body 10 is an amorphous thermoplastic resin with a glass transition point of 170°C or higher or a crystalline thermoplastic resin with a melting point of 230°C or higher. The thermoplastic resin also has a dielectric breakdown strength of 15 kV / mm or higher, preferably 20 kV / mm or higher. These characteristics ensure that the cap body 10 has excellent heat resistance that meets the heat resistance test standards for firefighting applications, as well as voltage resistance that meets the voltage resistance test standards specified in ISO standards. The dielectric breakdown strength can be determined in accordance with JIS C2110-1:2016, "Solid Electrical Insulating Materials - Test Methods for Dielectric Breakdown Strength - Part 1: Tests Using Power Frequency AC Voltage." The glass transition point can be determined according to JIS K7121. The melting point can be determined according to JIS K0064.

[0045] There is no particular limit to the thickness of the cap body 10, but it is preferably 2.0 to 3.5 mm for reasons of ensuring insulation, reducing weight, and passing impact resistance tests and heat resistance and fire resistance tests. Furthermore, the cap body 10 is preferably made of a thermoplastic resin, which allows the connecting member joint 15 and the adapter joint 16 to be integrally molded, reducing the number of steps in the cap body assembly process, and ensuring mass productivity through injection molding.

[0046] Examples of thermoplastic resins include PA (polyamide), PPS (polyphenylene sulfide), PEEK (polyether ether ketone), LCP (liquid crystal polymer), PEI (polyetherimide), PAI (polyamide imide), PI (polyimide), and PBI (polybenzimidazole). PEI or PEEK are particularly desirable because they offer both heat resistance and durability and can also provide insulation. Thermoplastic resins may also contain fillers such as glass fiber or additives to enhance their physical properties.

[0047] The applicant conducted the following conductive head manikin test on the helmet 1 according to this embodiment. Specifically, the test was conducted in accordance with EN 13087-8:2000, 5.2, as specified in ISO / DIS 11999-5, with the following modifications: a) The voltage was increased to 2200 VAC; b) The crown leads were attached to all metal parts on the exterior of the fire helmet, including the connection mechanism between the helmet shell 10 and the face shield 2; c) The face shield 2 was tested in both the in-use and retracted states, with all exposed surfaces included in the evaluation. The test results showed a leakage current of less than 3.0 mA, confirming that the helmet 1 has sufficient insulation performance.

[0048] The applicant conducted the following wet helmet insulation test on the helmet 1 according to this embodiment. Specifically, the test was conducted in accordance with EN 13087-8:2000, section 5.3, as specified in ISO / DIS 11999-5, with the following modifications: a) The voltage was increased to 2200 VAC; b) The test period was maintained at 60 seconds ± 2 seconds; c) The dielectric wire was positioned 20 mm below the lowest point of the bottom edge of the helmet shell 10 (when worn); d) The face shield 2 was tested both in the in-use and stowed states, with all exposed surfaces included in the evaluation. The test results showed a leakage current of less than 3.0 mA, confirming that the helmet 1 has sufficient insulation performance. [Explanation of symbols]

[0049] 1. Helmet (fire helmet) 2 Face shield 3 Adapter 4 Connecting member 5 Hammock 6 Headband 7 Shock absorbing liner 10 Hat body 10a Outer shell 10b inner peripheral surface 11 cap body main body 13 Eaves 14 Protective section 15 Connecting member joint 16 Adapter joint 17 Flange 20 Support shaft portion 21 Guide hole 22 locking portion 23 restricting portion 24 Shield eaves 30 Engagement hole 31 Rotation shaft 32 Guide pin 33 Regulating protrusion 34 Locking body 41 Connection hole 42 Hammock attachment hole 51 Linking portion 52 Linking hole 53 Fastening member 54 Headband joint 54a Junction hole 61 Adjustment section 62 Joint piece

Claims

1. A fire helmet comprising a cap body having an outer shell and an interior part provided on the inner peripheral surface of the cap body, A joint portion integral with the cap body is formed on the inner peripheral surface of the cap body, The interior part is joined to the joint portion, A firefighting helmet, wherein the cap body has a protective portion that is molded integrally with the outer shell and continues from one side of the cap body through a rear surface of the cap body to the other side of the cap body.

2. 2. The fire helmet according to claim 1, wherein the interior part comprises at least one of a face shield, a hammock, and a headband.

3. 2. The fire helmet according to claim 1, wherein the outer shell of the helmet body has no hole formed therein that communicates with the inner peripheral surface of the helmet body.

4. The interior part includes a face shield, 2. The fire fighting helmet according to claim 1, wherein the face shield is rotatably attached to the helmet body.

5. 5. The fire helmet according to claim 4, wherein the face shield is movable between a use state in which the face shield is exposed to the outside of the helmet body and a non-use state in which the face shield is housed inside the helmet body.

6. 6. The fire fighting helmet according to claim 1, wherein the cap body is made of a thermoplastic resin.

7. 6. The fire fighting helmet according to claim 1, wherein the cap body is made of a PEI resin.

8. 6. The firefighting helmet according to claim 1, wherein when the helmet body is subjected to a conductive head mannequin test specified in ISO / DIS 11999-5, a leakage current is less than 3.0 mA.

9. 6. The firefighting helmet according to claim 1, wherein a leakage current is less than 3.0 mA when the helmet body is subjected to a wet helmet insulation test specified in ISO / DIS 11999-5.

10. A fire helmet body formed with an outer shell, A joint portion for providing an interior part is formed integrally with the cap body on the inner peripheral surface of the cap body, A fire helmet body in which a protective portion that continues from one side of the helmet body, via a rear surface of the helmet body, to the other side of the helmet body is molded integrally with the outer shell.

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