JP6147228B2 - Shield surface mounting structure in work helmet - Google Patents

Description

  In the work helmet, for the safety of the worker, for example, the face of the worker is protected with a transparent shield surface. The present invention is an invention relating to a shield surface mounting structure in such a working helmet.

The work helmet has a structure that covers and protects the worker's face with a shield surface, which is a transparent plate made of synthetic resin, depending on conditions such as the type of work and the work environment, and the shield surface is protected against the helmet body. The structure which can cover an operator's face only when a shield surface is required is devised by making it possible to appear and disappear.
In Patent Document 1, a shield surface guide plate is arranged on the inner surface of the helmet body, a guide groove is formed on the shield surface guide plate, a slide leg is formed to protrude on the shield surface, and the slide leg of the shield surface is formed on the shield surface. An invention is disclosed in which a shield surface can be raised and lowered by engaging with a guide groove of a guide plate.

  In Patent Document 2, a guide hole is formed in the shield support plate, a locking projection formed to protrude from the protective shield is inserted into the guide hole, and a locking projection that protrudes inside the helmet is a dharma hole. It is possible to attach a locking plate provided with a stop hole, maintain the protective shield in a mounted state by moving the locking plate in the horizontal direction, and remove the protective shield by moving the locking plate in the horizontal direction. A protective shield mounting structure in a work helmet is disclosed.

JP 2011-89219 A JP 2012-62601 A

  In the inventions described in Patent Documents 1 and 2, a slide leg and a locking projection are integrally projected on a shield surface, and the projection is inserted into a guide hole or a slide groove formed on the shield surface support plate. The slide structure of the surface (protective shield) is completed. When the shield surface is attached, it is necessary to attach the shield surface through a gap between the shield surface support plate and the helmet body. Therefore, in the conventional work helmet described in Patent Documents 1 and 2, the shield surface support plate attached to the helmet body can pass the protrusion formed on the shield surface between the helmet body inner surface. It is necessary to fix in a state where the gap is held. Moreover, when inserting a shield surface between the shield surface support plate of a helmet main body, there existed a fault that a protrusion part may become obstructive and it may become difficult to attach or detach a shield surface.

  In view of the above-mentioned drawbacks of the prior art, the present invention can be handled with as little gap as possible between the inner surface of the helmet body and the shield plate support plate without forming a relatively large protrusion such as a slide leg on the shield surface itself. An object of the present invention is to realize a working helmet which is easy and can effectively use the inner surface of the helmet, in other words, can reduce the size of the helmet body.

According to the first aspect of the present invention, the shield surface support plate is in a state in which a gap that allows the shield surface 2 to move in the vertical direction is held between the inner surface in front of the center portion of the helmet body 1 and the helmet body 1. 3 is fixed to the helmet body 1.
The shield surface support plate 3 is formed with a pair of guide holes 4 and 4 extending in the vertical direction with a predetermined interval, and a plurality of locking step portions 6 are formed between the guide holes 4 and 4 on the outer surface side. In addition to forming the rack portion 5, the shield surface 2 disposed between the helmet body 1 and the shield surface support plate 3 has a mounting hole 7, which is a through hole, at a position coinciding with the pair of guide holes 4, 4. To drill.
Provided with a slide leg 8 penetrating the guide hole 4 of the shield surface support plate 3 and the mounting hole 7 of the shield surface 2, and a lock member 9 having elasticity in the direction in which the slide leg 8 spreads on the inner surface of the shield surface support plate 3 Deploy. Then, the slide leg 8 of the lock member 9 is passed through the guide hole 4 of the shield surface support plate 3 and the attachment hole 7 of the shield surface 2, and the engaging claw formed on a part of the slide leg 8 of the lock member 9. By engaging 10 with the side edge of the guide hole 4, the shield surface 2 is held on the shield surface support plate 3 and can be freely moved along the guide hole 4.
The face shield 2, projecting on the inner surface direction of the shield surface 2, Ru an elastic engagement pawl 11 which resiliently engages the engaging step 6 of the rack portion 5.

Furthermore, the mounting holes 7 forming the shield surface 2, a spacing and width to match the pair of guide holes 4, 4 bored in the shielding surface support plate 3, the sliding legs 8 projecting form the locking member 9 A through-hole with a length that passes through. The engaging claw 10 formed on the slide leg 8 is engaged with the outer edge in the width direction of the mounting hole 7, and the vertical rib 12 formed on the inner surface of the slide leg 8 of the lock member 9 is formed on the inner edge of the mounting hole 7. A vertical rib 12 formed on the inner surface of the slide leg 8 of the lock member 9 is fitted to the left and right outer edges at the lower position of the rack portion 5, that is, the inner edges of the guide holes 4, 4. A concavity 14 is formed. With this configuration, at the lower position of the rack portion 5, the locking member 9 that spreads outward is compressed inward, and the vertical rib 12 formed on the slide leg 8 is formed in the mounting hole 7 of the shield surface 2. 13 and the recess 14 formed on the left and right outer edges of the rack portion 5 to be compressed inwardly so that the lock member 9 can be detached, that is, the shield surface 2 can be detached. This is a structure for attaching a shield surface in a working helmet, characterized in that it is in a simple state .

The shield surface 2 is made of a transparent synthetic resin having elasticity, and a concave penetration portion is formed at an intermediate position between the attachment hole 7 and the attachment hole 7, and a rack is provided on the back surface of the protruding portion surrounded by the penetration portion on three sides. By projecting the claw 11a that engages with the locking step portion 6 of the portion 5, it is preferable to form the elastic locking claw 11 at the protruding portion surrounded by the penetration portion on the three sides .

The invention according to claim 2 is that the lock member 9 is integrally formed of a synthetic resin material having elasticity, and the left and right flat plate portions 16, 16 are continuously connected by the thin elastic portion 17, and the left and right flat plate portion surfaces are formed. In this case, the slide legs 8 are projected. An engaging claw 10 is formed outwardly at the tip of the slide leg 8 and a vertical rib 12 is formed on the inner surface of the slide leg 8.

Also, the face shield support plate 3 arranged in the first half portion of the helmet body 1 inner surface, a shell-like to be cut the trailing edge in a substantially perpendicular direction, the locking portion right and left sides of the rear end portion of the shield surface support plate 3 While being fixed to the helmet body 1 at 18, the upper part of the rear end portion can be locked to the inner surface of the helmet by the locking portion 19 .

According to the first aspect of the present invention, the flat shield surface 2 having no protrusions such as slide legs on the surface is inserted between the helmet body 1 and the shield surface support plate 3, and the inner surface of the shield surface support plate 3 is inserted. Can be attached or detached by operating the lock member 9. Therefore, the space between the helmet body 1 and the shield surface support plate 3 can be made as small as possible to effectively use the space inside the helmet body. In other words, when manufacturing helmets of the same size, the size of the helmet body 1 can be reduced.
When the slide leg protrudes from the shield surface, no large gap is required between the helmet body 1 and the shield surface support plate 3 when the slide leg is engaged with the guide groove. When attaching and detaching, a gap through which the protruding portion passes is required between the helmet body 1 and the shield surface support plate. On the other hand, in the present invention, since there is no slide leg on the shield surface, a large gap through which the slide leg passes between the helmet body 1 and the shield surface support plate 3 is not required.

Further, with the shield surface support plate 3 attached to the helmet body 1, the upper end portion of the shield surface 2 is inserted between the helmet body 1 at the lower end opening and the shield surface support plate 3 so that the lock member 9 is inward. And the slide leg 8 of the lock member 9 is aligned with the guide hole 4 of the shield surface support plate 3 and the shield surface by aligning the recess 14 of the guide hole 4 with the recess 13 of the mounting hole 7 of the shield surface 2. 2 attachment holes 7 can be passed through. When the slide leg 8 is inserted and the compression of the lock member 9 is released in a state where the guide hole 4 and the attachment hole 7 are passed, the elastic force of the lock member 9 increases the distance between the slide legs 8, 8. The engaging claw 10 engages with the outer edge of the mounting hole 7 on the shield surface. When the shield surface 2 is moved upward in this state, the vertical rib 12 of the lock member abuts against the inner edge of the guide hole 4 with the engaging claw 10 engaged with the guide hole 4, and the shield surface 2 is moved. It can be moved up and down. That is, the shield surface 2 can move up and down without falling off.

According to the second aspect of the present invention, the lock member 9 having elasticity in the direction in which the slide leg 8 spreads can be implemented with a synthetic structure of a synthetic resin material with a reasonable structure, and the parts can be made inexpensively. Can be provided.
Further, the shield surface 2 is made of a transparent synthetic resin having elasticity, a concave through portion is formed at an intermediate position between the mounting hole 7 and the mounting hole 7, and a rack is mounted on the back surface of the protruding portion surrounded by the through portion on three sides. When the elastic locking claw 11 is formed by projecting the claw 11 a that engages with the locking step portion 6 of the portion 5, the elastic locking claw 11 formed on the shield surface 2 is integrated with the shield surface 2. There is no need to form and process the elastic locking claw 11 again.
Further, in the case where the shield surface support plate 3 is disposed in the front half of the inner surface of the helmet body 1 and the rear edge is cut in a substantially vertical direction, the left and right sides of the rear end portion of the shield surface support plate 3 are engaged. The shield surface support plate 3 is firmly attached to the helmet body 1 with three-point support by fixing the helmet body 1 with the stopper 18 and locking the upper portion of the rear end portion with the inner surface of the helmet with the locking portion 19. And can be stably supported and mounted.

FIG. 1 shows an embodiment of the present invention, and is a longitudinal sectional view of the entire helmet in a state in which a shield surface is housed. 2 is a longitudinal sectional view of the entire helmet with the shield surface lowered, FIG. 3 is a perspective view of the entire helmet shown by cutting and removing a part of the helmet body. FIG. 4 is a front perspective view in which a shield surface is assembled to a shield surface support plate with a lock member, FIG. 5 is a rear perspective view in which a shield surface and a shield surface support plate are assembled. FIG. 6 is a front perspective view of the shield surface support plate, FIG. 7 is a front perspective view of the shield surface, 8 is an enlarged view of the mounting hole portion of FIG. FIG. 9 is a front view and a perspective view of the lock member, FIG. 10 is a front perspective view of a state in which a lock member is attached to the shield surface. FIG. 11 is an enlarged view of the attachment hole portion of FIG.

Hereinafter, an embodiment of a shield surface mounting structure in a working helmet according to the present invention will be described with reference to the accompanying drawings.
1 is a longitudinal sectional view of the entire helmet with the shield surface stored, FIG. 2 is a longitudinal sectional view of the entire helmet with the shield surface lowered, and FIG. FIG. 4 is a front perspective view in which a shield surface is assembled to a shield surface support plate with a lock member.

  The work helmet according to the present invention is provided with a shield surface 2 that covers the front of the operator's face for safety. The shield surface 2 is a transparent shield lens made of, for example, synthetic resin and does not hinder the work. For example, the shield surface 2 is for protecting the operator's face from scattered objects. If the shield surface is not required depending on the work, push the shield surface into the helmet body and use it.

As shown in FIGS. 1 and 2, a substantially shell-like shield surface support plate 3 is attached to the helmet body 1 so as to be along the inner surface of the front portion of the helmet body 1 that is a cap body. The shield surface support plate 3 is fixed in a state in which a gap that allows the shield surface 2 to freely move up and down is maintained between the shield surface support plate 3 and the helmet body 1.
The shield surface support plate 3 is disposed in the front half of the inner surface of the helmet body 1 and has a shell shape whose rear end edge is cut in a substantially vertical direction. The shield surface support plate 3 fixes the left and right sides of the rear end portion to the helmet body 1 with the locking portions 18 and 18, and the upper portion of the rear end portion is locked to the upper portion of the inner surface of the helmet body 1 with the locking portion 19. To do. The locking portions on the left and right sides are fixed by a fixing tool (not shown) such as another lock pin, and the locking portion 19 at the upper inner surface of the helmet body 1 is a part of the shield surface support plate 3. The engaging portion 19 can be firmly fixed by engaging with the inner surface of the helmet body.

  As shown in FIG. 6, the shield surface support plate 3 is formed with a pair of guide holes 4, 4 extending in the vertical direction at regular intervals in the center of the front, and between the guide hole 4 and the guide hole 4. A rack portion 5 having a large number of locking step portions 6 and 6 formed on the surface side is formed. Semicircular arc-shaped recesses 14 and 14 are formed in the inner edges of the lower portions of the guide holes 4 and 4, respectively.

On the other hand, the shield surface 2 is made of, for example, a transparent synthetic resin having elasticity, and has a curved shape capable of covering the face as shown in FIG. 7 and has a shape along the shield surface support plate 3. At the upper part of the shield surface 2, mounting holes 7 and 7, which are square through holes, are formed at intervals equal to the intervals between the guide holes 4 and 4 provided on the shield surface support plate 3. On the inner edges of the mounting holes 7 and 7, recesses 14 and 14 provided in the lower part of the guide holes 4 and 4 and recesses 13 and 13 are formed at positions corresponding to the vertical direction.
A concave penetrating portion 15 is formed at an intermediate position between the mounting holes 7 and 7, and a claw 11 a that engages with the locking step portion 6 of the rack portion 5 is formed on the back surface of the protruding portion surrounded on three sides by the penetrating portion. The elastic locking claw 11 is formed by projecting.

The shield surface 2 and the shield surface support plate 3 are mounted so as to be movable in the vertical direction by the lock member 9. That is, since the shield surface support plate 3 is fixed to the helmet body 1, the shield surface 2 appears and disappears from the helmet body 1.
The lock member 9 can be manufactured by integral molding with a synthetic resin material having elasticity. As shown in FIG. 9, the lock member 9 is formed by connecting substantially rectangular flat plate portions 16, 16 located on the left and right sides with a thin elastic portion 17 that can be elastically deformed. With this structure, the flat plate portion can be pressed inward, and the thin elastic portion can be compressed and acted so as to be urged outward by the elasticity of the thin elastic portion 17. A slide leg 8 that can be inserted into an attachment hole formed in the shield plate 2 is projected on the back surface of the flat plate portion 16.

The slide leg 8 has a thickness t which is a relatively thin thickness, and has a length that can be inserted into the mounting hole 7 of the shield surface 2. A vertical rib 12 having a height h (projection dimension) is formed at the center position of the inner surface of the slide leg 8, and an engagement claw 10 having a projection width X is formed at the distal end portion of the slide leg on the outer surface. . The protruding dimension of the slide leg 8 excluding the thickness of the engaging claw 10 is assumed to be l.
The dimension t + h of the slide leg 8 is substantially the same as the width W of the mounting hole 7 of the shield surface 2 and the width W of the guide hole 4 of the shield surface support plate 3 and can be moved along the guide hole 4. The engagement claw 10 is engaged with the outer edge of the mounting hole 7 by the projection dimension X, and the lock claw 9 does not fall off. At this time, the slide leg 8 is constantly urged outward by the elasticity of the thin elastic portion 17, so that the lock member 9 can be more reliably prevented from falling off.

In the work helmet according to the present invention, in order to attach the shield surface 2, the upper end portion of the shield surface 2 is inserted into the gap between the helmet body 1 and the shield surface support plate 3 from below the helmet body 1, The formed recess 13 of the mounting hole 7 is aligned with the recess 14 formed in the guide hole 4 of the shield surface support plate 3, and the lower surface of the guide hole 4 from the inner surface of the helmet, that is, the inner surface of the shield surface support plate 3. The slide leg of the lock member 9 is inserted into the recess 14 at the position. The lock member 9 pushes and contracts the flat plate portion from the left and right to pass the vertical ribs 12 of the slide leg 8 through the recesses 13 and 14, and the engagement claw 10 passes through the shield surface 2 while the lock member 9 is inside. Release the compressive force toward. That is, when the lock member 9 is inserted while being pressed from the left and right with fingers, and the finger is released when the slide leg 8 passes, the lock member 9 spreads, and the engaging claw 10 extends to the outer edge portion of the guide hole 4. Simultaneously with the engagement, the vertical ribs 12 inside the slide legs 8 are disengaged from the recesses 13 and 14. In this state, the engaging claw 10 engages with the guide hole 4 of the shield surface support plate 3, and the shield surface 2 can freely move in the vertical direction without being detached from the shield surface support plate 3. is there.
Since the slide leg 8 of the lock member 9 passes through the guide hole 4 of the shield surface support plate 3 and the mounting hole 7 of the shield surface 2, the length of the slide leg, specifically, the engagement claw 10 The protruding dimension l excluding the thickness is a dimension that substantially matches the thickness of the shield surface support plate 3 and the shield surface 2 that are overlapped, and is a length that has some allowance. Thereby, the shield surface 2 can be moved smoothly.

A rack portion 5 having a plurality of locking step portions 6 is formed on the surface of the shield surface support plate 3. On the other hand, an elastic locking claw 11 is formed on the shield surface 2 by a horizontal U-shaped through portion 15. On the back surface of the elastic locking claw 11, a claw 11a that engages with the locking step portion 6 of the rack portion 5 is formed.
The shield surface 2 is formed of an elastic synthetic resin material so that the claw 11a of the elastic locking claw 11 protruding from the back surface is engaged with the locking step portion 6 with a constant force. be able to. Therefore, the shield surface 2 moved in the vertical direction by the hand can be stopped at the moved predetermined position, and can be moved to the desired position by the hand and stopped at that position. Therefore, it is possible to efficiently work while taking in and out the shield surface.

  The helmet should be used with interior parts such as chin straps and hammocks. In the working helmet of the illustrated embodiment, the rear interior part locking part 19 is formed integrally with the rear half of the helmet body 1, and the front interior part locking part 20 is formed on the inner surface of the shield surface support plate 3 by integral molding. ing.

DESCRIPTION OF SYMBOLS 1 ... Helmet body, 2 ... Shield surface, 3 ... Shield surface support plate, 4 ... Guide hole, 5 ... Rack part, 6 ... Locking step part, 7 ... Mounting hole, 8 ... Slide leg, 9 ... Lock member, 10 ... engaging claw, 11 ... elastic locking claw, 11a ... claw, 12 ... vertical rib, 13, 14 ... recess, 15 ... penetrating part, 16 ... flat plate part, 17 ... thin elastic part, 18 ... locking part, 19: Rear interior part locking part, 20 ... Front interior part locking part.

Claims (2)

The shield surface support plate is fixed to the helmet body in a state where a gap that allows the shield surface to move in the vertical direction between the helmet body and the inner surface in front of the center portion of the helmet body is maintained.
A pair of guide holes extending in the up-down direction at regular intervals are formed in the shield surface support plate, and a rack portion is formed in which a large number of locking step portions are formed on the outer surface side between the guide holes. In addition, the shield surface disposed between the helmet body and the shield surface support plate is provided with a mounting hole which is a through hole at a position corresponding to the pair of guide holes,
A slide leg that penetrates the guide hole of the shield surface support plate and the mounting hole of the shield surface, and a lock member having elasticity in the direction in which the slide leg spreads is arranged on the inner surface of the shield surface support plate, and the slide leg of the lock member is The shield surface is shielded by penetrating the guide hole of the shield surface support plate and the mounting hole of the shield surface, and engaging the engaging claw formed on a part of the slide leg of the lock member with the side edge of the guide hole. was held on the support plate, and freely movable along the guide hole of the shield plate support plate, the shield surface, projecting on the inner surface direction of the shield surface, resiliently engages the engaging step portion of the rack portion an elastic locking claw to be provided Rutotomoni,
The mounting hole formed in the shield surface is a through hole having a distance and a width that match a pair of guide holes drilled in the shield surface support plate, and a length through which a slide leg that protrudes from the lock member passes, The engaging claw formed on the slide leg is engaged with the outer edge in the width direction of the mounting hole, and a recess in which the vertical rib formed on the inner side surface of the slide leg of the lock member is fitted to the inner edge of the mounting hole. A lock that is formed and formed with recesses into which the vertical ribs formed on the inner side surface of the slide leg of the lock member are fitted at the left and right outer edges of the lower position of the rack portion, and spreads outward at the lower position of the rack portion. Compress the member inward and fit the locking member inward by fitting the vertical rib formed on the slide leg into the recess formed in the mounting hole of the shield surface and the recess formed in the left and right outer edges of the rack part Compressed into and out of lock member Shield surface mounting structure in the working helmet, characterized in that the capacity. The lock member is integrally molded with a synthetic resin material having elasticity, and between the left and right flat plate portions and the flat plate portion is made continuous with a thin elastic portion, and the slide legs protrude from the surfaces of the left and right flat plate portions, respectively. 2. The shield surface mounting structure for a work helmet according to claim 1, wherein an engaging claw is formed outwardly at a tip portion of the slide leg, and a vertical rib is formed on an inner surface of the slide leg.

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