JP2017025426A - Helmet and manufacturing method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a helmet for an electric work engineer having presbyopia with which he/she can clearly see an object in the vicinity without wearing reading glasses.SOLUTION: A face shield 5 is vertically liftably attached to a cap body 2, and a magnifier 8 allowing a user to see a virtual image that an object is magnified is provided in a part of the face shield 5. The magnifier 8 is configured by attaching a Fresnel lens sheet 7 in the inside of the face shield 5. Thereby, normally, a user wears a helmet 1 on his/her head with the face shield 5 housed in the cap body 2 (refer to a selection drawing (a)). In this state, when the face shield 5 is pulled down to the lowest position (refer to a selection drawing (b)), the original function (protection of both eyes, mainly) of the face shield 5 can be used. When the face shield 5 is slightly pulled down (refer to a selection drawing (c)), an enlargement function of the Fresnel lens sheet 7 can be used.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a helmet suitable for, for example, an electrician in charge of presbyopia (presbyopia) and a method for manufacturing the same.

  Conventionally, as this type of helmet, in order to protect the wearer's head and face and at the same time to ensure visibility during work, a transparent face shield that can cover the wearer's face is raised and lowered on the shell (shell) What was attached freely is used widely (for example, refer to patent documents 1).

JP 2009-203369 A

  However, when the helmet wearer is presbyopic, it is necessary to wear reading glasses when looking closely at nearby objects (for example, electrical wiring diagrams at hand). They often wore it, and there was a fact that it was cumbersome to bother taking out and wearing reading glasses.

  The same applies to work helmets and riding helmets other than those for electrical work.

  In view of such circumstances, a first object of the present invention is to provide a helmet that can clearly see nearby objects without wearing reading glasses. A second object is to provide a manufacturing method capable of easily manufacturing such a helmet.

  In order to achieve such an object, the invention according to claim 1 is a helmet in which a face shield is provided on a cap body so as to cover the face of the wearer, and a magnifying glass unit for viewing an enlarged virtual image of an object Is a helmet provided in a part of the face shield.

  According to a second aspect of the present invention, in addition to the configuration of the first aspect, the face shield is attached to the cap body so as to be movable up and down, and the face shield has a predetermined enlarged reference position excluding the lowest position. The object is configured to be visible through the magnifying glass portion of the face shield when positioned to the position.

  Further, in the invention described in claim 3, in addition to the structure described in claim 1 or 2, the magnifying glass part is configured by attaching a Fresnel lens sheet to a part of the face shield. And

  The invention according to claim 4 is characterized in that, in addition to the configuration according to claim 3, the Fresnel lens sheet is adhered to the inside of the face shield.

  Further, the invention according to claim 5 is the helmet manufacturing method according to claim 3 or 4, wherein a material sheet of a Fresnel lens having a plurality of concentric annular lenses is cut into a predetermined shape, A Fresnel lens sheet production process for producing a Fresnel lens sheet, a Fresnel lens sheet application process for attaching the Fresnel lens sheet produced in this Fresnel lens sheet production process to one adhesive surface of a double-sided tape, and the other of the double-sided tape The helmet manufacturing method includes a double-sided tape affixing step for affixing an adhesive surface to the face shield.

  Moreover, in addition to the structure of Claim 5, when the invention of Claim 6 affixes the said Fresnel lens sheet to one adhesive surface of the said double-sided tape in the said Fresnel lens sheet sticking process, the said Fresnel lens The Fresnel lens sheet is continuously affixed to the double-sided tape from one end to the other end while maintaining the state where the unattached part of the lens sheet is raised at about 90 ° with respect to the double-sided tape. And

  In addition to the configuration according to claim 5 or 6, the invention according to claim 7 uses a pressing device to remove bubbles generated between the Fresnel lens sheet and the double-sided tape in the Fresnel lens sheet attaching step. By pushing out to the outside, the entire surface of the Fresnel lens sheet is put on the double-sided tape.

  Moreover, in addition to the structure in any one of Claims 5 thru | or 7, in invention of Claim 8, in the said Fresnel lens sheet preparation process, when producing the two said Fresnel lens sheets, the said material sheet is used. By cutting out along a cutting line passing through the center of the annular lens, both of these two Fresnel lens sheets include the center of the annular lens of the material sheet.

  According to the first aspect of the present invention, since the magnifying glass part for viewing the magnified virtual image of the object is provided in a part of the face shield, the reading glasses are worn by viewing the object through the magnifying glass part. Even without it, it becomes possible to see nearby objects clearly.

  According to the second aspect of the present invention, when the face shield is attached to the cap body so as to be movable up and down, the face shield is enlarged when the face shield is positioned at a predetermined enlargement reference position excluding the lowest position. Since it is configured so that objects can be seen through the mirror part, if you lower the face shield to the lowest position, you can use the original function of the face shield (mainly protection of both eyes), and if you pull the face shield down slightly, it will expand You can use the magnifier function of the mirror. As a result, it is possible to improve the usability of the helmet having the above-described effects.

  Further, according to the invention described in claim 3, since the magnifying glass part is configured by attaching the Fresnel lens sheet to a part of the face shield, the structure of the helmet that exhibits the above-described effect can be simplified. can do.

  Further, according to the invention described in claim 4, since the Fresnel lens sheet is adhered to the inside of the face shield, the Fresnel lens sheet is difficult to get dirty, and the expansion function of the Fresnel lens sheet can be maintained over a long period of time. It becomes possible.

  Furthermore, according to the invention described in claim 5, a Fresnel lens sheet manufacturing step of manufacturing a Fresnel lens sheet by cutting a Fresnel lens material sheet having a plurality of concentric annular lenses into a predetermined shape, and this Fresnel lens Since it includes a Fresnel lens sheet affixing step for attaching the Fresnel lens sheet produced in the lens sheet production process to one adhesive surface of the double-sided tape, and a double-sided tape affixing step for affixing the other adhesive surface of the double-sided tape to the face shield A helmet that exhibits the above-described effects can be easily manufactured.

  According to the invention of claim 6, when the Fresnel lens sheet is attached to one adhesive surface of the double-sided tape in the Fresnel lens sheet attaching step, the non-attached portion of the Fresnel lens sheet is attached to the double-sided tape. Since the Fresnel lens sheet is continuously affixed to the double-sided tape from one end to the other while maintaining the raised state at about 90 °, bubbles are generated between the Fresnel lens sheet and the double-sided tape. Both can be easily pasted together.

  According to the invention described in claim 7, in the Fresnel lens sheet sticking step, the air bubbles generated between the Fresnel lens sheet and the double-sided tape are pushed out to the outside by a pressing device, so that the entire surface of the Fresnel lens sheet is Since it will be in the state affixed on the said double-sided tape, in the double-sided tape sticking process, the other adhesive surface of a double-sided tape can be reliably affixed on a face shield.

  According to the invention described in claim 8, when two Fresnel lens sheets are manufactured in the Fresnel lens sheet manufacturing step, the material sheet is cut out along a cutting line passing through the center of the annular lens. Since both of these two Fresnel lens sheets include the center of the annular lens of the material sheet, the yield of the Fresnel lens sheet can be increased while maintaining the performance of the Fresnel lens sheet, and as a result It becomes possible to keep the manufacturing cost low.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the mounting state of the helmet which concerns on Embodiment 1 of this invention, Comprising: (a) is a perspective view which shows the state in which the face shield was accommodated in the cap body, (b) positioned the face shield in the lowest position. FIG. 4C is a perspective view illustrating the state where the face shield is positioned, and FIG. It is a longitudinal cross-sectional view of the face shield of the helmet which concerns on the same Embodiment 1. FIG. It is the schematic which shows the Fresnel lens sheet sticking apparatus used for the manufacturing method of the helmet which concerns on the same Embodiment 1, Comprising: (a) is the top view, (b) is the front view. It is a schematic diagram which illustrates the Fresnel lens sheet preparation process in the manufacturing method of the helmet which concerns on the same Embodiment 1. FIG. It is a schematic diagram which illustrates the Fresnel lens sheet sticking process in the manufacturing method of the helmet which concerns on the same Embodiment 1. FIG. It is a schematic diagram which illustrates the double-sided tape sticking process in the manufacturing method of the helmet which concerns on the same Embodiment 1. FIG.

  Embodiments of the present invention will be described below.

Embodiment 1 of the Invention
1 to 6 show a first embodiment of the present invention.

  The helmet 1 according to the first embodiment is for electrical work, and has a cap body 2 made of a synthetic resin such as ABS resin and high-density polyethylene (HDPE) as shown in FIG. On the front side of the cap body 2, a collar 3 made of a synthetic resin such as polycarbonate or polyethylene is attached so as to protrude forward, and a colorless and transparent face shield 5 made of a synthetic resin such as polycarbonate or polyethylene, It is housed inside the front part of the cap body 2 so as to cover the face of the wearer of the helmet 1 and is mounted so as to be movable up and down in a form that can be fixed at an arbitrary position (height). A chin strap 6 for fixing the helmet 1 to the wearer's head is attached to the lower part of the cap body 2.

  Then, inside the face shield 5, a magnifying glass part 8 for viewing an enlarged virtual image of the object is formed in the vicinity of the lower end part thereof as shown in FIGS. 1 (b), (c) and FIG. 2. An arcuate rectangular Fresnel lens sheet 7 is stuck via a colorless and transparent double-sided tape 9. As the double-sided tape 9, any type of tape can be used as long as it has the property of being highly transparent and difficult to peel off.

  Moreover, the Fresnel lens sheet sticking apparatus 15 used for the manufacturing method of this helmet 1 has the flame | frame 16 comprised by assembling several angles, as shown in FIG. A support base 11 is fixed horizontally to the frame 16, and the support base 11 has a structure in which a flat rubber sheet 11b is laid on the upper surface of the body 11a. A guide rail 17 is attached to the frame 16 so as to extend in the horizontal direction. A lens guide jig 13 is supported on the guide rail 17 so as to be movable in the horizontal direction (in the directions of arrows A and B) above the support base 11. The lens guide jig 13 is mainly vertically mounted. From an upright flat plate 13a and an L-shaped cross-section guide member 13c attached to form a slit 13b having a predetermined width on the side (right side in FIG. 3) of the back plate 13a. It is configured. Further, a double-sided tape support shaft 19 is disposed on the frame 16 in parallel with the guide rail 17 behind the guide rail 17, and a tape winding roll 20 is rotatably supported on the double-sided tape support shaft 19. . The tape winding roll 20 is obtained by winding a double-sided tape 9 protected on one side with a release paper (mounting paper) into a cylindrical shape (roll shape) so that the release paper side is on the outside.

  Next, an example of the manufacturing method of this helmet 1 is demonstrated based on FIGS.

  First, in the Fresnel lens sheet manufacturing process, as shown in FIG. 4 (a), a square Fresnel lens material sheet 10 having a plurality of concentric annular lenses 10a is prepared. As shown in b), the material sheet 10 is cut into an arcuate rectangle to produce two Fresnel lens sheets 7.

  At this time, as shown in FIG. 4B, when two Fresnel lens sheets are produced, the material sheet 10 is cut out along a curved cutting line L1 passing through the center CT1 of the annular lens 10a. The two Fresnel lens sheets 7 both include the center CT1 of the annular lens 10a of the material sheet 10.

  Next, the process proceeds to the Fresnel lens sheet attaching step, and the Fresnel lens sheet 7 thus produced is applied to one adhesive surface 9a of the double-sided tape 9 by the Fresnel lens sheet attaching device 15 (the adhesive surface on the side not protected by the release paper). paste.

  For this purpose, first, as shown by a two-dot chain line in FIG. 3, the double-sided tape 9 is pulled out from the tape winding roll 20 and cut at a required length, and this double-sided tape 9 is Placed on. At this time, one adhesive surface 9a of the double-sided tape 9 is directed upward.

  In this state, as shown in FIG. 5A, the Fresnel lens sheet 7 is inserted into the slit 13b of the lens guide jig 13 from above, and the tip of the Fresnel lens sheet 7 is attached to one adhesive surface 9a of the double-sided tape 9. Paste to. Thereafter, as shown in FIGS. 5B to 5E, the hand roller 12 is rolled on the upper side of the Fresnel lens sheet 7, and the Fresnel lens sheet 7 is continuously double-sided from one end to the other end. The tape 9 is attached to one adhesive surface 9a.

  Then, the hand roller 12 advances while pressing the Fresnel lens sheet 7 downward, that is, the double-sided tape 9 side, and at the same time, the lens guide jig 13 is pushed and moved forward (in the direction of arrow A). By the cooperation of the hand roller 12 and the lens guide jig 13, the unattached portion 7 a is pressed against the back plate 13 a of the lens guide jig 13, and is in a substantially vertical state (that is, about the double-sided tape 9. While being maintained at 90 °), it is attached to one adhesive surface 9a of the double-sided tape 9.

  At this time, since the lower surface of the double-sided tape 9 is in contact with the rubber sheet 11b of the support base 11 and a large frictional force is generated between the double-sided tape 9 and the rubber sheet 11b, even if the hand roller 12 is rolled. There is no fear that the double-sided tape 9 is shifted forward, and the operation of attaching the Fresnel lens sheet 7 can be smoothly proceeded.

  In addition, air bubbles were generated between the Fresnel lens sheet 7 and the double-sided tape 9 while the Fresnel lens sheet 7 was attached to the double-sided tape 9 or after the Fresnel lens sheet 7 was attached to the double-sided tape 9. In that case, the entire surface of the Fresnel lens sheet 7 is stuck to the double-sided tape 9 by extruding the air bubbles to the outside with the hand roller 12.

  Thus, when the Fresnel lens sheet 7 is affixed to one adhesive surface 9a of the double-sided tape 9, the process proceeds to a double-sided tape affixing process, and as shown in FIG. After the surface 9 b is exposed, the adhesive surface 9 b is attached to the inside of the face shield 5. Then, as shown in FIG. 2, the Fresnel lens sheet 7 is attached to the inside of the face shield 5 via the double-sided tape 9, and the helmet 1 is completed.

  Here, the manufacturing process of the helmet 1 is completed.

  In this helmet 1 manufacturing method, a Fresnel lens sheet manufacturing step of cutting out a Fresnel lens material sheet 10 to manufacture a Fresnel lens sheet 7, and a Fresnel lens sheet 7 attached to one adhesive surface 9 a of a double-sided tape 9. Since the helmet 1 is completed through the lens sheet attaching step and the double-sided tape attaching step of attaching the other adhesive surface 9b of the double-sided tape 9 to the face shield 5, the helmet 1 can be easily manufactured.

  At this time, in the Fresnel lens sheet manufacturing process, when two Fresnel lens sheets 7 are manufactured, the material sheet 10 is cut out along a cutting line L1 passing through the center CT1 of the annular lens 10a. Since each of the Fresnel lens sheets 7 includes the center CT1 of the annular lens 10a of the material sheet 10, it is possible to increase the yield of the Fresnel lens sheet 7 while maintaining the performance of the Fresnel lens sheet 7. The manufacturing cost of the helmet 1 can be suppressed at a low cost.

  In the Fresnel lens sheet attaching step, when the Fresnel lens sheet 7 is attached to one adhesive surface 9a of the double-sided tape 9, the non-attached portion 7a of the Fresnel lens sheet 7 is set to about 90 ° with respect to the double-sided tape 8. Since the Fresnel lens sheet 7 is continuously stuck to the double-sided tape 9 from its one end to the other end while maintaining the raised state, no air bubbles are generated between the Fresnel lens sheet 7 and the double-sided tape 9. Both can be easily bonded together.

  Furthermore, in this Fresnel lens sheet affixing step, air bubbles generated between the Fresnel lens sheet 7 and the double-sided tape 9 are pushed out by the hand roller 12 so that the entire surface of the Fresnel lens sheet 7 is affixed to the double-sided tape 9. Therefore, the other adhesive surface 9b of the double-sided tape 9 can be reliably attached to the face shield 5 in the double-sided tape attaching step.

  Next, the usage method of this helmet 1 is demonstrated.

  First, when protecting only the head of the wearer with the helmet 1, the face shield 5 is housed in the cap body 2 and the chin strap 6 is loosened, as shown in FIG. The helmet 1 is put on the head with the buttocks 3 of the body 2 facing forward, and the chin strap 6 is tightened to fix the helmet 1 to the head. Then, the head is protected by the cap body 2 and the face shield 5 is not provided in front of the face, so that the electrical work can be performed safely and smoothly.

  Further, when protecting both the head and face of the wearer with the helmet 1, with the helmet 1 on the head, the face shield 5 is pulled down to the end as shown in FIG. Position to. Then, the head is protected by the cap body 2 and the face (particularly both eyes) is protected by the face shield 5. At this time, since the face shield 5 is colorless and transparent, it is possible to secure a field of view during work. Therefore, even when the face shield 5 is positioned at the lowest position, electrical work can be performed without any trouble.

  Further, when a presbyopic wearer looks at a nearby object (for example, a material such as an electrical wiring diagram at hand), as shown in FIG. 5 is slightly pulled down and positioned at a predetermined enlargement reference position. Then, while the head is protected by the cap body 2 and the object can be visually recognized through the Fresnel lens sheet 7 of the face shield 5, it is possible to clearly see nearby objects without taking out the reading glasses and wearing them. Become. In addition, since the double-sided tape 9 is attached to the entire surface of the Fresnel lens sheet 7, dust does not enter between the Fresnel lens sheet 7 and the face shield 5, and a clear view can be maintained.

  Thus, in this helmet 1, if the face shield 5 is pulled down to the lowest position, the original function of the face shield 5 (mainly protection of both eyes) can be used, and if the face shield 5 is pulled down slightly, the Fresnel lens sheet 7 You can use the enlargement function. As a result, it is possible to clearly see nearby objects even with presbyopia and to improve the usability of the helmet 1.

  Moreover, in this helmet 1, since the magnifier part 8 is comprised by attaching the Fresnel lens sheet 7 to a part of face shield 5, the structure of this helmet 1 can be simplified.

  Moreover, in this helmet 1, since the Fresnel lens sheet 7 is adhered to the inside of the face shield 5, even if the helmet 1 is used for a long period of time, the Fresnel lens sheet 7 becomes difficult to get dirty, and the Fresnel lens sheet 7 is enlarged. The function can be maintained.

[Other Embodiments of the Invention]
In Embodiment 1 described above, in the Fresnel lens sheet affixing step of the helmet 1 manufacturing method, after the double-sided tape 9 is pulled out from the tape winding roll 20 and cut, the Fresnel lens sheet 7 is affixed to the double-sided tape 9. The case of attaching was explained. However, a plurality of Fresnel lens sheets 7 may be sequentially attached without cutting the double-sided tape 9.

  In Embodiment 1 described above, when a presbyopic wearer sees a nearby object, dust may enter between the Fresnel lens sheet 7 and the face shield 5 to cause the wearer's field of vision to become unclear. The helmet 1 in which the double-sided tape 9 is attached to the entire surface of the Fresnel lens sheet 7 has been described. However, since such a situation is unlikely to occur in a work environment with little dust, the double-sided tape 9 may be attached only to both ends of the Fresnel lens sheet 7.

  Moreover, in Embodiment 1 mentioned above, although the case where the Fresnel lens sheet 7 was attached to the face shield 5 using the double-sided tape 9 was demonstrated, attachment methods other than the double-sided tape 9 can be substituted or used together. For example, a pair of left and right locking members (not shown) are attached to the inner surface of the face shield 5, and both ends of the Fresnel lens sheet 7 are locked to these locking members, whereby the elastic force of the Fresnel lens sheet 7 is obtained. It is also possible to attach the Fresnel lens sheet 7 in close contact with the inner surface of the face shield 5 by using

  Furthermore, in the first embodiment described above, the case where the Fresnel lens sheet 7 is attached to the face shield 5 in order to provide the magnifying glass part 8 on a part of the face shield 5 has been described. However, the magnifier 8 may be provided by processing the face shield 5 itself with a Fresnel lens.

  Moreover, in Embodiment 1 mentioned above, in the Fresnel lens sheet sticking process of the manufacturing method of the helmet 1, the case where the hand roller 12 is used when sticking the Fresnel lens sheet 7 to one adhesive surface 9a of the double-sided tape 9 is described. did. However, as long as the Fresnel lens sheet 7 can be pressed against the double-sided tape 9, a pressing device other than the hand roller 12 can be used instead or in combination.

  Further, in the first embodiment described above, in the Fresnel lens sheet manufacturing process of the helmet 1 manufacturing method, the Fresnel lens material sheet 10 is provided in order to increase the yield of the Fresnel lens sheet 7 while maintaining the performance of the Fresnel lens sheet 7. In the case where the two Fresnel lens sheets 7 are manufactured from the above, the case where each of the two Fresnel lens sheets 7 includes the center CT1 of the annular lens 10a of the material sheet 10 has been described. However, if it is necessary to further improve the performance of the Fresnel lens sheet 7, the material sheet 10 of the Fresnel lens 10 to 1 so that the center CT 1 of the annular lens 10 a of the material sheet 10 substantially coincides with the center of the Fresnel lens sheet 7. A single Fresnel lens sheet 7 may be produced. On the contrary, when it is not necessary to improve the performance of the Fresnel lens sheet 7 so much, the yield of the Fresnel lens sheet 7 (the manufacturing cost of the helmet 1) is emphasized, and three or more Fresnel lenses from the material sheet 10 of the Fresnel lens are used. The sheet 7 may be produced.

  Moreover, in Embodiment 1 mentioned above, although Embodiment 1 mentioned above demonstrated the helmet 1 which is not provided with the ventilation system for reducing the stuffiness during work, in the helmet provided with such a ventilation system, However, it goes without saying that the present invention can be similarly applied.

  Furthermore, although Embodiment 1 mentioned above demonstrated the helmet 1 for electric construction, it is also possible to apply this invention similarly to the helmet used for uses other than for electric construction.

  The present invention is not only for electrical work, construction / civil engineering work, fire fighting, security, harbor handling work, forestry work and other work helmets, but also helmets for various uses such as disaster prevention, sports, and riding. It can be applied widely.

DESCRIPTION OF SYMBOLS 1 ... Helmet 2 ... Cap body 5 ... Face shield 7 ... Fresnel lens sheet 7a ... Unattached part 8 ... Magnifying glass part 9 ... Double-sided tape 9a ... One adhesive surface 9b ... The other adhesive Surface 10 ... Material sheet for Fresnel lens 10a ... Ring zone lens 12 ... Pressing device (hand roller)
13c …… Guide member CT1 …… Center of the zonal lens L1 …… Cut line

Claims (8)

A helmet provided with a face shield covering the face of the wearer on the cap body,
A helmet characterized in that a magnifying glass part for viewing a magnified virtual image of an object is provided on a part of the face shield. The face shield is attached to the cap body so as to be movable up and down,
2. The structure according to claim 1, wherein when the face shield is positioned at a predetermined enlargement reference position excluding the lowest position, the object can be viewed through the magnifier portion of the face shield. Helmet.   The helmet according to claim 1 or 2, wherein the magnifier unit is configured by attaching a Fresnel lens sheet to a part of the face shield.   The helmet according to claim 3, wherein the Fresnel lens sheet is adhered to the inside of the face shield. A helmet manufacturing method according to claim 3 or 4,
A Fresnel lens sheet production step of producing a Fresnel lens sheet by cutting out a Fresnel lens material sheet having a plurality of concentric annular lenses into a predetermined shape;
A Fresnel lens sheet pasting step of pasting the Fresnel lens sheet fabricated in this Fresnel lens sheet fabrication step on one adhesive surface of the double-sided tape;
A method for manufacturing a helmet, comprising: a double-sided tape affixing step of affixing the other adhesive surface of the double-sided tape to the face shield.   In the Fresnel lens sheet affixing step, when the Fresnel lens sheet is affixed to one adhesive surface of the double-sided tape, a state where the non-adhered part of the Fresnel lens sheet is raised to about 90 ° with respect to the double-sided tape. The method for manufacturing a helmet according to claim 5, wherein the Fresnel lens sheet is continuously adhered to the double-sided tape from one end to the other end while maintaining.   In the Fresnel lens sheet affixing step, air bubbles generated between the Fresnel lens sheet and the double-sided tape are pushed out to the outside by a pressing device, so that the entire surface of the Fresnel lens sheet is affixed to the double-sided tape. The manufacturing method of the helmet of Claim 5 or 6 characterized by the above-mentioned.   In the Fresnel lens sheet manufacturing step, when two Fresnel lens sheets are manufactured, the material sheet is cut out along a cutting line passing through the center of the annular lens. The method for manufacturing a helmet according to any one of claims 5 to 7, further comprising a center of an annular lens of the material sheet.