JP2008261075A - Helmet having detachable shield face - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a helmet having a detachable shield face capable of being easily attached and detached to a shield face-supporting part in order to avoid the shield face from damage in operation sites. <P>SOLUTION: A frame 4 supporting a hammock and a head band and a shield face 6 for face protection on the front inside surface of and apart from a shell 2 is installed at the lower edge part, and the frame 4 has mountain-forming part 4a having the top at the front center and an upward supporting rail 5 for supporting the shield face 6 having T-shape when viewed from a cross-section is integrally molded from a synthetic resin on the mountain-forming part 4a, and a guide part 5a branched in inverted U-shape extending downward from the lower edge of the frame 4 is formed in the lower part of the supporting rail 5 and the shield face 6 is formed of a transparent raw material and a slider 7 vertically sliding while straddling the supporting rail 5 in detachable engagement with the rail 5 is provided at the central upper part of the shield face 6. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a helmet having a detachable shield surface, and in particular, a visor is made of a material that secures an upper field of view, and a frame is provided at the lower edge of the shell with a space between the shell and the inner surface of the shell. In addition to providing a T-shaped support rail in cross-sectional view for supporting the protective shield surface at the center upper portion of the frame, a guide portion branched in an inverted U shape is formed at the lower portion of the support rail, The protective shield surface is formed of a transparent material, and relates to a helmet having a removable shield surface in which a slider that detachably straddles and slides on the support rail is provided at an upper center portion of the shield surface.

Conventionally, the shield surface of this type of helmet has been formed to be freely movable up and down, but has not been configured to be detachable. That is, when the shield surface is not used, it can be accommodated upward, but a mechanism for easily removing it is not provided (see Patent Document 1).
JP 2003-49316 A

  In other words, in the conventional example, the shield surface is contaminated or scratched while the helmet is being used while the shield surface is stored in the shield surface storage position in the front part of the shell of the helmet, and the transparency of the shield surface is reduced. There was a concern that it would be damaged and the strength deteriorated, and the shield surface could not be safely held and managed. That is, in the conventional helmet shield surface, it is not easy to attach the helmet when necessary and remove it when it is not needed, and always use the shield surface accommodated in the shield surface storage position of the helmet.

  Therefore, a technical problem has arisen in order to attach the shield surface during the work process necessary for protecting the face according to the nature of the work, and to remove it when it is not necessary. The object is to solve this problem.

  The present invention has been proposed to achieve the above object, and the invention according to claim 1 comprises a visor formed in the vicinity of the front lower edge of the shell of the helmet made of a material that secures an upper field of view, and A frame that supports a shield surface for protecting the face together with a hammock and a headband is fixed to the lower inner edge of the shell with a gap from the shell on the inner front surface of the shell, and the frame has a mountain-shaped forming portion having a top at the front center. In addition, an upward support rail having a T-shape in cross section for supporting the shield surface is integrally formed of synthetic resin on the mountain-shaped forming portion, and the lower portion of the support rail is a lower edge of the frame A guide portion branched into an inverted U shape extending downward is formed. The shield surface is formed of a transparent material. The slider to slide there is provided a helmet having a removable shield surface consisting provided at the top center of the shield surface.

  By adopting such a configuration, it is possible to secure an upper field of view of the helmet and easily replace the shield surface.

In the invention according to claim 2, the guide portion branched into an inverted U shape at the lower portion of the support rail is formed with a slight horizontal step portion facing outward from the left and right outer sides of the substantially central portion of the guide portion, and The attachment / detachment according to claim 1, wherein a taper is formed from the outer end of the horizontal step portion toward the tip of each of the inverted U-shaped guide portions to serve as a guide portion and a stopper after the slider is mounted. A helmet having a flexible shield surface is provided.

  With such a configuration, it is possible to further easily attach the shield surface to the support rail of the frame, and to maintain the face protection position of the shield surface.

  According to a third aspect of the present invention, the support rail is provided with slopes up and down on both outer sides of the support rail at a height position substantially corresponding to the height of the slider upward from the position of the stopper after guiding the slider. According to another aspect of the present invention, there is provided a helmet having a detachable shield surface according to claim 2, wherein a small convex portion is formed to prevent the slider from inadvertently rising.

  By adopting such a configuration, it is possible to avoid unnecessary elevation from the face protection position of the shield surface.

  According to a fourth aspect of the present invention, the slider is formed in a shape in which the support rail having a T-shape in cross-section is held in a substantially purse-like net shape, and the shield surface has a plurality of gaps at a predetermined interval in the lateral direction on the upper part. A helmet having a detachable shield surface according to claim 1, 2 or 3, wherein a ventilation hole is formed.

  By adopting such a configuration, the slider can always stably sit on the support rail, and as a result, the safety of the shield surface can be ensured, and the ventilation hole allows the shield surface wearer to It is possible to induce air permeability during the work process and maintain a comfortable work environment.

  In the first aspect of the invention, since the visor formed on the lower front edge of the shell is made of a material that secures the upper field of view, a wide field of view including the upper field of view when wearing the helmet can be secured, thereby improving workability. be able to.

  Further, the frame has a mountain-shaped forming portion having a top at the front center, and an upward support rail having a T-shaped cross-sectional view for supporting a shield surface for protecting the face is formed on the mountain-shaped forming portion. Provided integrally with synthetic resin, the lower part of the support rail is formed with a reverse U-shaped guide that extends below the lower edge of the frame, and is detachably engaged with the support rail. However, since the slider that slides up and down is provided at the center upper part of the shield surface, the shield surface can be easily and quickly attached to and removed from the support frame. Therefore, safe management can be performed while avoiding breakage and fouling of the shield surface, and wasteful expenses can be reduced.

  In addition, when the shield surface is soiled, the shield surface can be easily removed from the support rail, and the shield surface as an alternative can be attached to the support rail with a single touch. Thus, the troublesome work of reassembling can be avoided.

  According to the second aspect of the present invention, the guide portion branched into an inverted U shape at the lower portion of the support rail is formed with a slight horizontal step portion facing outward from the left and right outer sides of the substantially central portion of the guide portion, Since the taper is formed from the outer end of the horizontal step portion toward the tip of the guide portion branched into each inverted U shape, and the slider is used as a guide rail and a stopper after guidance, the slider is used as a support rail. The guide that branches in an inverted U shape is formed with a taper toward the tip, and the branch guide is flexible, so that it can be easily attached. The shield surface can be provided on the shell very smoothly and with one touch.

  Then, after the slider of the shield surface is introduced into the support rail, the stopper of the support rail locks the lower edge of the slider, so that the shield surface can be stably maintained at the protected position.

  On the other hand, when removing the shield surface from the support rail, if the two lower ends of the inverted U-shaped guides are pulled inward, the stopper releases the slider from the lower edge. It is possible to drop down and remove it easily.

  Furthermore, the invention described in claim 3 is a small convex part having a slope on the upper and lower sides of the support rail at a height position substantially corresponding to the height of the slider upward from the position of the stopper after introduction of the slider. In order to prevent the slider from inadvertently rising, in addition to the effect of the invention of claim 1 or the effect of the invention of claim 2, the wearer of the helmet is in the process of working. Even if the slider moves up and down, the shield surface is prevented by the small protrusion provided on the support rail to prevent the shield surface from rising, and the shield position is still maintained, so that the workability can be improved.

  Furthermore, since the small protrusion has a slope on the top and bottom, if it is lifted with force, it can be slid further upward over the small protrusion, and similarly, it is lowered again and placed in the stopper position. Is also possible.

  Further, in the invention according to claim 4, since the slider is formed in a shape that embraces the support rail having a T-shape in cross section in a substantially purse-like shape, the slider is stably straddled on the support rail. However, as a result, the shield surface formed integrally with the slider can be securely held in the face protection position or the shield surface storage position above the shell. It can contribute to the improvement of efficiency.

  Furthermore, since the shield surface has a plurality of air holes formed in the upper part at a predetermined interval in the lateral direction, the effect of the invention of claim 1, the effect of the invention of claim 2, Alternatively, in addition to the effect of the invention according to claim 3, it is possible to increase the air permeability inside the shell and maintain a comfortable working environment when the helmet wearer gets hot air during the work.

  In order to solve the above technical problem, the present invention is configured such that a visor formed on the lower front edge of the shell of the helmet is made of a material that secures an upper field of view, and the inner surface of the front shell is spaced from the shell. The frame is fixed to the lower edge of the shell, and the frame has a chevron-shaped portion having a top at the front center, and has an upward T-shape for supporting a shield surface for protecting the face. The support rail is integrally formed of synthetic resin on the chevron forming portion, and the lower portion of the support rail is formed with an inverted U-shaped guide portion extending below the lower edge of the frame. The shield surface is formed of a transparent material, and a slider that slides up and down while being detachably engaged with the support rail is provided at the upper center of the shield surface. To achieve a quick release of the field surface.

  A preferred embodiment of the present invention will be described in detail with reference to FIGS. 1, 2A and 2B, and FIGS. 3A and 3B. FIG. 1 is a cross-sectional view of a main part and a front side view (side cross-sectional view) cut along a front-rear direction center line in a helmet-mounted state according to an embodiment of the present invention, where 1 is a helmet and 2 is a cap body of the helmet 1 ( It is a hemispherical shell constituting a shell, and is made of a hard reinforced synthetic resin. If possible, it can withstand high impact with high strength when molded with FRP thermosetting resin. Further, the strength of the shell can be further increased by providing a groove in the upper surface portion of the shell. Further, rain guard 2a, which is a groove for removing rain, is formed on the outer periphery of the lower edge of the shell, so that dripping of raindrops can be prevented.

  As indicated by reference numeral 2b, an impact-absorbing liner made of foamed polystyrene or the like is provided on the inner surface of the shell 2 so as to be in close contact with the inner surface.

  In FIG. 1, reference numeral 3 denotes a visor for avoiding sunlight, raindrops, etc. provided at the lower front edge of the shell, which is a material for ensuring a good upper field of view, that is, transparent or direct sunlight. A molded object made of a translucent material to be reduced is attached by extending the tip of the visor outward from the inner front side of the shell by an appropriate fixing method such as screwing.

In FIG. 1, reference numeral 4 denotes a plate, which is firmly fixed to the shell below the front back surface of the shell 1 or in the vicinity of the lower edge by a mounting means such as a screw while maintaining a predetermined distance. The plate 4 is formed of a synthetic resin having rigidity, and has a predetermined elastic deformation property, that is, flexibility corresponding to an external force. As will be described later, this plate 4 constitutes one wing for supporting a hammock and a headband, and an upward support rail 5 having a T-shape in cross section for supporting the shield surface is forward from the lower edge of the plate 4. It is integrally formed over the upper surface of the chevron forming portion 4a having a top at the center. In FIG. 1, 6 indicates a shield surface for protecting the face described above, and 7 indicates a slider provided at the center upper portion of the shield surface. Specifically, the slider 7 is mounted on the support rail 5, the slider 7 receives support while straddling the support rail 5, and the slider 7 slides up and down along the support rail 5 ( Slide). For convenience of explanation, when the shield surface is in the lower protection position, the shield surface 6 and the slider 7 are not suffixed. When the shield surface is in the upper storage position, the suffix 1 is added. , Shield surface 6 ₁ , slider 7 ₁ .

  FIG. 2 (a) is a front view showing a mechanism for the mounting rail of the plate to receive the shield surface 6 and its slider 7. FIG. 2 (b) is provided on the shield surface 6 and its upper part. It is a front view which shows the slider 7 which is. Of course, the slider 7 is integrally attached to the shield surface 6 as shown in FIGS. 1 and 2B, and the shield surface 6 is also attached to the shell through the attachment of the slider 7 to the support rail 5. .

  As described above, the support rail 5 is formed integrally with the synthetic resin from the lower edge of the frame 4 to the top of the chevron forming part 4a on the upper surface of the chevron forming part 4a having the top at the front center of the frame 4. It is formed by doing.

  In FIG. 2 (a), reference numerals 5a and 5a denote guide parts branched in an inverted U shape, and the guide parts 5a and 5a are inserted into the slider 7 using the flexibility of the branched branches. It constitutes a guiding part for this purpose. In the figure, 5b and 5b are stoppers for locking the slider, and a step portion slightly extending outward from the side surface of the support rail is formed to exert the locking action. Accordingly, the slider that is inductively engaged with the support rail through the guide portions 5a and 5a is engaged with the stopper while straddling the support rail, so that the shield surface integral with the slider can be securely held at the protection position. it can.

  In FIG. 2A, 5b and 5b are tapered. The downward slope that gradually decreases toward the center on both outer sides of each branch branched in an inverted U-shape serves as a guide portion for mounting the slider on the shield surface, so that the slider can be mounted smoothly.

  In FIG. 2 (a), 5c and 5c denote small convex portions, and a slope extending vertically to the outside of the support rail having substantially the same height as the slider locked by the stoppers 5b and 5b. It is formed in preparation. Thus, the slider locked by the stoppers 5b and 5b is prevented from unexpectedly rising by the small convex portions 5c and 5c, and as a result, the shield surface 6 fixed integrally with the slider is the face of the wearer. The work position of the wearer is reliably maintained and the work efficiency of the wearer is improved. Since the small convex portions 5c, 5c have slopes at the top and bottom, it is possible to apply a force to raise the slider, and it is also possible to lift the slider over the small convex portions 5c, 5c. In addition, the slider can be lowered over the small convex portions 5c and 5c, and the slider and the shield surface formed integrally therewith can be placed at the positions of the stoppers 5b and 5b.

In FIG. 2 (a), 5d indicates an upper limit stopper, and after the slider 7 is guided to the support rail 5, it slides upward while straddling the support rail 5, and is lifted strongly to increase the small convex portion. 5c, 5
After getting over c, it slides further upward and stops at this upper limit stopper 5d. In other words, the upper limit stopper has a function of preventing the slider 7 from escaping beyond the upper limit of the support rail 5.

  In the figure, 5e and 5e are upper small convex portions having the same configuration as the small convex portions 5c and 5c. In other words, if these 5e and 5e are the upper small convex portions, it can be said that the small convex portions 5c and 5c described above correspond to the lower small convex portions. The upper small protrusions 5e and 5e have apexes at positions on the left and right sides of the support rail that are lowered from the upper limit stopper 5d by a distance corresponding to the approximate height of the slider 7, and before and after the apex. The up and down slopes are formed as in the small convex portions 5c and 5c.

  The upper small convex portions 5e and 5e move the slider 7 on the shield surface 6 over the small convex portions 5c and 5c from the position of the stoppers 5b and 5b, which are protective positions, and further on the support rail 5. The slider 7 and the shield surface 6 integral with the slider 7 are held in the storage position for storing them in the shell in a state where they slide to reach the uppermost portion and come into contact with the upper limit stopper 5d. Is. Thus, when it is necessary for the helmet wearer to temporarily raise the shield surface to the storage position during the work, the slider 7 is engaged with the upper small convex portions 5e, 5e to perform storage. be able to. Of course, the upper small convex portions 5e, 5e can be released by being strongly lowered, and the slider 7 and the shield surface 6 integrally formed therewith are slid down again, and the face of the helmet wearer is lowered. It can be placed in a protective position for protection or removed from the support rail for safe storage of the shield surface.

  In addition, in FIG. 2A, 5f shows the web part (abdominal part) which makes the perpendicular | vertical support part of the support rail which made the said cross-sectional view T-shaped. The web portion 5f is formed integrally with the chevron forming portion 4a, and has a function of firmly holding the slider and the shield surface while integrally connecting both sides of the support rail, that is, flange portions.

 In addition, in the chevron formation part 4a of the frame, holes (reference numerals omitted) are formed on both sides of the support rail 5, and this makes the chevron formation part 4a flexible. It gives the material, saves the material, and helps to improve the air permeability.

  Next, FIG. 2B is a front view showing the shield surface 6 to which the slider 7 is fixed. The slider 7 is integrally fixed to the upper center of the shield surface 6. The same resin material may be integrally formed, or a slider formed of a separate material may be integrally fixed to the shield surface. The material of the shield surface 6 is not particularly limited, but if a hard polycarbonate resin is used and the surface is finely finished, the transparency is large, the impact resistance is strong, and the thermoplastic resin There is an advantage that molding can be easily performed from the attribute.

  The slider 7 has a shape obtained by cutting out the center portion of the bottom wall of the horizontally long rectangular cylinder in cross section. In other words, the slider 7 is formed in a shape that holds a support rail having a T-shaped cross section in a substantially purse-like shape. Has been. Thus, the slider can rise and fall on the support rail while stably straddling the support rail.

  The material of the slider is not particularly limited, but if it is molded integrally with the shield surface, it will be molded with polycarbonate resin. If the slider is molded separately, high-density polyethylene will be used. If the material is provided with (HDPE), there is an advantage that the strength is high and the molding process is easy by taking advantage of the performance of the thermoplastic resin.

In the figure, 6a indicates a vent hole. The ventilation holes 6a are formed in a horizontally long rectangular shape at equal intervals in the lateral direction above the line of sight of the shield surface 6. The vent hole 6a is formed at the same time as the shield surface 6 is molded, so that it is usually not necessary to perform a separate drilling operation. Thus, the presence of the air holes 6a causes hot air in the vicinity of the shell in response to the intensity of labor and temperature rise during the work process, but the hot air is exhausted to the front outside of the helmet through the air holes 6a. Thus, it is possible to maintain a comfortable space for the wearer.

  Fig.3 (a) is the sectional view on the AA line of Fig.2 (a), and has shown the state which the said support rail 5 protrudes in plate shape on either side. Further, it can be seen that the web portion 5f is placed in the center as an abdomen and bears strong support performance. FIG. 3 (b) is a cross-sectional view taken along the line BB of FIG. 2 (b). The slider 7 is cut at the center of the bottom wall of a rectangular tube (height 12 mm, width 21 mm) having a flat rectangular shape. The shape is made. That is, the slider is configured to have a support rail having a T-shape in cross-section in a substantially purse-like shape. Therefore, the support rail fits into the slider 7 in the form of a seal joint through the guide portions 5a and 5a of the support rail 5, and the slider 7 is integrated with the shield surface 6 and sits on the support rail while being protected. It is possible to slide without swinging to various positions, and to secure a protected position stably.

  The present invention can be variously modified without departing from the basic spirit of the present invention, and the present invention naturally extends to the modified one.

These are sectional side views which showed the Example of this invention and cut | disconnected in the center part in the front-back direction. (A) is a detailed view of the support rail in the same front view, and (b) is a front view of the same, and is a detailed view of the shield surface and slider. (A) is the sectional view on the AA line of Fig.2 (a), The figure (b) is the BB sectional view of FIG.2 (b).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Helmet 2 Shell 2a Rain guard 2b Liner 3 Visor 4 Frame 4a Mountain-shaped formation part 5 Support rail 5a Guide part branched in reverse U shape 5b Stopper 5c Small convex part 5d Upper limit stopper 5e Upper small convex part 5f Web part
6 Shield surface 6a Vent
7 Slider

Claims (4)

  A visor formed in the vicinity of the lower front edge of the shell of the helmet is made of a material that secures an upper field of view. The frame is fixed to the lower edge of the shell, and the frame has a chevron forming portion having a top at the front center, and an upward support rail having a T-shape in cross-section for supporting the shield surface. A synthetic resin is integrally formed on the forming portion, and the lower portion of the support rail is formed with an inverted U-shaped guide portion extending below the lower edge of the frame, and the shield surface is a transparent material. And a slider that slides up and down while being detachably engaged with the support rail and provided at the center upper portion of the shield surface. Helmet with a universal shield surface.   The guide portion branched into an inverted U shape at the lower portion of the support rail is formed with a slight horizontal step portion outwardly from the left and right outer sides of the substantially central portion of the guide portion, and from the outer end of the horizontal step portion. 2. The removable shield according to claim 1, wherein a taper is formed toward the tip of each guide portion branched into an inverted U shape to serve as a guiding portion when the slider is mounted and a stopper after guiding. Helmet with face.   The support rail is formed by forming small convex portions with up and down slopes on both outer sides of the support rail at a height position substantially equivalent to the height of the slider upward from the position of the stopper after guiding the slider. The helmet having a detachable shield surface according to claim 2, which is configured to prevent inadvertent rise of the slider. The slider is formed so that the support rail having a T-shape in cross-section is held in a substantially purse-like shape, and the shield surface has a plurality of ventilation holes formed at predetermined intervals in the lateral direction. 4. A helmet having a removable shield surface according to claim 1, 2, or 3.

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