JPH0421788Y2 - - Google Patents

Description

[Detailed explanation of the invention] A. Purpose of the invention (1) Industrial application field The present invention provides a helmet, particularly a cap body, with a lower end portion of a hammock made of a flexible material that supports the head of the helmet wearer. The hammock is of a type in which an arm part is integrally formed on the hammock to which a size band whose circumference can be adjusted according to the head size of the helmet wearer is attached.

(2) Prior art The helmet of the above type is, for example,
Conventionally known as disclosed in Publication No. 81310,
In this conventional device, changes in the diameter of the size band that occur when the circumference of the size band is adjusted can be easily accommodated by deformation of the hammock arms.

(3) Problems to be solved by the invention In the above-mentioned conventional device, a vertical band insertion hole is formed in the arm of the hammock, and a locking hole protruding from the upper edge of the size band is inserted into this insertion hole. The size band is suspended from the hammock arm by inserting the end of the arm extending in the circumferential direction of the band. For this reason, it is necessary to specially form the above-mentioned locking arm portion whose tip extends long in the circumferential direction of the band on the upper edge of the size band, which makes the structure of the size band itself complicated, and Each locking arm that extends longer than the band supports the size band in a cantilevered manner and receives the load from the band as a bending load, so high support strength cannot be obtained, and each lock There are problems such as the base of the arm being more likely to break than the size band.
Furthermore, when adjusting the circumference of the size band, the locking arm of the size band relatively slides in the circumferential direction within the band insertion hole, so the longer the maximum adjustment amount of the circumference is set, the more the size band is adjusted. It is necessary to increase the amount of extension of the locking arm in the circumferential direction of the band, and as a result, there is a problem in that the supporting strength of the locking arm with respect to the size band further decreases.

The present invention has been proposed in view of the above, and can solve the above-mentioned problems of the conventional technology.Moreover, the size band itself and the attachment part of the band to the hammock can be covered from the inside with a sweat-preventing member. To provide a helmet which can enhance the feeling of fitting to the head.

B. Structure of the invention (1) Means for solving the problem In order to achieve the above object, the present invention has the following features in the cap body:
An arm part for securing a hammock made of a flexible material that supports the head of a helmet wearer, and attaching to the hammock a size band whose circumference can be adjusted according to the head size of the helmet wearer. In the helmet, the size band is formed with an engagement hole extending in the circumferential direction of the helmet, and the arm part has a locking part at the tip that engages with the inner surface of the size band. and a shaft portion that is slidably inserted into the engagement hole is provided protrudingly, and a sweat-preventing member that covers the inner surface of the band and the inner end of the locking portion is supported at the lower part of the size band. Features.

(2) Effect Since the arms of the hammock can directly support the size band through the shaft and the engagement hole, no bending load is applied to the band itself in order to support the size band, as in the conventional case. There is no need to provide a special extension portion, which increases the support strength of the hammock arm to the size band.

Furthermore, by simply making the engagement hole to be drilled in the size band longer, the maximum adjustment amount of the circumference of the band can be easily extended.

In addition, by specially providing the above-mentioned sweatproof member, it is possible to enhance the fit of the inner surface of the size band to the head, and even if some unevenness occurs on the inner surface of the size band due to the presence of the locking part, it will not be caused by the unevenness. The sweatproof member alleviates the foreign body sensation experienced by the user.

(3) Example Hereinafter, an example in which the present invention is applied to a firefighting helmet will be explained with reference to the drawings. First, in Figures 1 to 5, the cap body 2 of the helmet 1 is made of hard reinforced resin. Hemispherical shell 3,
The shell 3 is composed of a shock absorbing liner 4 made of expanded polystyrene that is tightly fitted to the inner surface of the shell 3.
An outwardly projecting flange portion 5 is integrally provided on the opening edge of the opening.

A roller mounting band 6 made of a flexible material, such as a synthetic resin such as polyethylene, is fixed to the inner surface of the shell 3 near the opening edge by a plurality of rivets 7 over substantially the entire circumference. Moreover, the upper end of the roller attachment band 6 is sandwiched between the shell 3 and the shock absorbing liner 4 in the portion of the cap body 2 excluding the front portion. Further, the lower half of the roller attachment band 6 protrudes from the opening edge of the cap body 2. A plurality of male stops 8 are fixed to the protruding lower half, and female stops provided on rollers (not shown) are engaged with these male stops 8 by snaps. Therefore, a roller can be detachably attached to the roller attachment band 6.

At the front of the cap body 2, the shock absorbing liner 4 is not tightly fitted to the inner surface of the shell 3, and the roller attachment band 6 has a guide portion 10 that forms an accommodation space 9 between it and the inner surface of the shell 3. is integrally provided extending upwardly between the shell 3 and the impact liner 4.

The guide portion 10 is movable between a protective position where the helmet wearer's face is covered and an exposed position where the helmet is evacuated from the protective position and accommodated in the storage space 9 to expose the helmet wearer's face. A shield plate 11 is supported. This shield plate 1
Reference numeral 1 is made of synthetic resin such as polycarbonate and has translucency, and is formed in an arc shape that bulges forward.

The guide portion 10 has a plurality of, for example, three, extending vertically.
Two guide holes 12, 12, 12 are bored,
The shield plate 11 is integrally provided with three engaging protrusions 13 , 13 , 13 that can be slidably engaged with the guide holes 12 . Each engagement protrusion 13 consists of a shaft 14 projecting from the upper rear surface of the shield plate 11 in correspondence with each guide hole 12, and a locking collar 15 provided at the tip of the shaft 14. The shaft 14 has a substantially rectangular cross-sectional shape so as to be slidable into the guide hole 12, and the locking collar 15 is formed to have a diameter larger than the width of the guide hole 12. Furthermore, the locking collar 15 and the shaft 14 are provided with a groove 16 extending in the axial direction, and by bending the groove 16 so as to narrow the width, the diameter of the locking collar 15 can be reduced.

By reducing the diameter of each locking collar 15 and bending the guide portion 10 near the guide hole 12, the locking collar 15 can be easily inserted into and removed from the guide hole 12, and the shaft 14 is guided. By releasing the contracted diameter state of the locking collar 15 when inserted into the hole 12, the engaging protrusion 13 can be engaged with the guide hole 12. In this engaged state, the shield plate 11 is movable within the range where the shaft 14 abuts both the upper and lower ends of the guide hole 12, and the guide hole 12 exposes the shield plate 11 when the shaft 14 abuts the upper end. The length is set such that the shield plate 11 is in the protective position when the shaft 14 comes into contact with the lower end. Moreover, the cross-sectional shape and dimensions of the shaft 14 are set to such an extent that the shield plate 11 can be held by friction with the inner surface of the guide hole 12.

A pair of chin straps 17,
17 is removably attached, and a hammock 18 for receiving the head of the helmet wearer.
is removably attached, and a hammock 18
A size band 19 is removably attached to.

Referring to FIGS. 6 and 7 together, each chinstrap 17 has brackets 20, 20 at both ends thereof made of a flexible material, for example, a synthetic resin such as polyethylene.
are connected, and these brackets 20, 2
0 is removably connected to connecting shafts 21, 21 fixed to the inner surface of the roller mounting band 6. In each bracket 20, a pot-shaped locking hole 24 is formed by connecting a large diameter hole 24a and a small diameter hole 24b to each other via a neck 24c. At the same time, an oval protrusion 25 is protruded to surround the locking hole 24, and an engagement collar 26 is provided between the protrusion 25 and the small diameter hole 24b. On the other hand, each connecting shaft 21 is made of synthetic resin and has a diameter large enough to be inserted into the large-diameter hole 24a, and is protruded from the inner surface of the roller mounting band 6 by a rivet 27. Furthermore, an annular groove 28 is provided on the outer surface of the intermediate portion of the connecting shaft 21, and the engaging collar 26 can be engaged with the annular groove 28, and the bottom diameter of the annular groove 28 is set to be slightly larger than the width of the neck portion 24c.

Therefore, the connecting shaft 21 is inserted into the large diameter hole 24a, and while expanding the neck 24c of the potbellied locking hole 24 so that the engaging collar 26 engages with the annular groove 28, the connecting shaft 21 is inserted into the large diameter hole. By positioning it from the part 24a to the small diameter hole part 24b side, the bracket 20, that is, the chinstrap 17, and the collar attachment band 6 are connected, and by performing the opposite operation,
The connection between the bracket 20, that is, the chin strap 17, and the collar attachment band 6 is released.

The hammock 18 consists of a hammock body 29 and a plurality of head holders 31 that are integral with the hammock body 29 and fastened by strings 30, and are made of synthetic resin such as polyethylene.

The hammock main body 29 consists of an annular portion 32 and a plurality of legs 33 connected to the annular portion 32 at equal intervals in the circumferential direction.As shown in FIG.
3 is removably attached to the roller attachment band 6. That is, at the tip of each leg 33, a large diameter hole 34a and a small diameter hole 34b are connected to a neck 34c.
A pot-shaped locking hole 34 is formed with the large diameter hole 34a facing upward, and a connecting shaft is connected to the cap body 2 and the roller attachment band 6 by a rivet 7. 35 is provided protrudingly. Further, an elliptical protrusion 3 is provided on the leg portion 33 surrounding the locking hole 34.
8 is provided in a protruding manner, and an engagement collar 39 is formed between the small diameter hole portion 34b and the protrusion 38. This locking hole 34
and a connecting shaft 35 having an annular groove 36 and protruding from the roller attachment band 6 are removably connected in the same manner as the connection structure of the roller attachment band 6 and the chin strap 17 described above.

The head receiving portion 31 includes an annular portion 32 in the hammock body 29 and mutually adjacent leg portions 33, 33.
It is formed into a substantially U-shape by cutting a part of the leg part 33, and a plurality of leg parts 33 are provided by cutting off one of the leg parts 33. Moreover, each head holder 31
The tip of the string 30 is fastened to the string 30.
By adjusting the degree of fastening, it is possible to accommodate changes in the size of the helmet wearer's head.

Some of the plurality of legs 33 in the hammock main body 29 are integrally provided with arm parts 40 bent in a substantially L-shape and having a mounting part 41 at the tip.
The size band 19 is removably attached to the attachment part 41.

In FIG. 9, the size band 19 is formed into a band shape from a flexible material, such as a synthetic resin such as polyethylene, and has a circumferential length that can be adjusted according to the head size of the helmet wearer. It is concluded. That is, one longitudinal end of the size band 19 is provided with a plurality of adjustment holes 42 spaced at equal intervals in the longitudinal direction.
At the other longitudinal end of the size band 19, there is a pair of engagement protrusions 4 that can engage with two of the adjustment holes 42.
3 and 43 are provided protrudingly. Further, a pair of locking portions 44, 44 for inserting and locking one longitudinal end portion of the size band 19 are integrally provided at the other end portion in the longitudinal direction.

At the bottom of size band 19 is size band 1.
One side edge of a vinyl chloride sweat stopper member 45 formed in a band shape to cover the inner surface of the member 9 is sewn. A large number of ventilation holes 46 and 47 are formed in the sweatproof member 45 and the size band 19, respectively.

Referring also to FIG. 10, a mounting part 41 of the hammock 18 has a fitting 48 projecting thereon, and the roller mounting band 6 has a longitudinally extending engagement fitting 48 for engaging the fitting 48. A matching hole 49 is bored. Furthermore, in order to prevent the fitting 48 from protruding from the inner surface of the roller mounting band 6 when the fitting 48 is engaged with the engagement hole 49, the roller mounting band 6 has a recess 50 recessed from the inner surface. The engagement holes 49 are provided in multiple locations, and the engagement holes 49 are located in the recesses 50 of these locations.
established in Further, a plurality of holes 51 are bored at the periphery of the recess 50 in order to bend the recess 50 when the fitting 48 and the engagement hole 49 are engaged and disengaged, thereby facilitating the engagement and disengagement operation.

The fixture 48 includes a shaft portion 52 having a rectangular cross section, a large-diameter disk portion 53 provided at one end of the shaft portion 52, and a disk-shaped locking portion 54 provided at the other end of the shaft portion 52. Consists of. On the other hand, the mounting portion 41 has a rectangular insertion hole 55 through which the shaft portion 52 can be inserted.
The shaft portion 52 of No. 8 is inserted into the insertion hole 55 so as to lock the disk portion 53 to the outer surface side of the mounting portion 41 . Also, when inserting the locking part 54, the insertion hole 55
In order to facilitate increasing the width of the insertion hole, circular holes 56, 56 are formed in the mounting portion 41, which are continuous at both ends in the longitudinal direction of the insertion hole. In this way, the fixture 48 is attached to the locking portion 54.
the mounting frame 41 so as to protrude inwardly.
mounted on. Moreover, the locking portion 54 is
The shaft portion 5 between the locking portion 54 and the attachment portion 41 is formed to have a diameter larger than the width of the recess 50 and a thickness equal to or less than the depth of the recess 50.
2 is determined in accordance with the thickness of the bottom of the recess 50.

Next, to explain the operation of this embodiment, when attaching the hammock 18 to the cap body 2,
The connecting shaft 35 is inserted into the large diameter hole 34a of the locking hole 34, and moved to the small diameter hole 34b side so that the annular groove 36 passes through the neck 34c.
It engages with the engagement collar 39 forming b. At this time, since the legs 33 of the hammock 18 are made of a flexible material, the connecting shaft 35 is connected to the large diameter hole 3.
The neck portion 34c can be expanded at the bottom of the annular groove 36 when moving from the annular groove 4a toward the small diameter hole 34b, making the engagement operation easy. Moreover, after the connecting shaft 35 is engaged with the locking hole 34, unless the connecting shaft 35 is forcibly moved from the small diameter hole 34b to the large diameter hole 34a side, the connecting shaft 35 is moved from the small diameter hole 34b to the large diameter hole 34a. Movement toward the diameter hole 34a is prevented by the neck 34c, and the attached state of the hammock 18 to the cap body 2 is maintained. In other words, when the hammock 18 receives the head of the helmet wearer, the tension force of the hammock 18 causes the connecting shaft 35 to move into the small diameter hole 3.
4b, and the connecting shaft 35 is received in the small diameter hole 3.
4b to the large diameter hole 34a side.

Further, when removing the hammock 18 from the cap body 2, contrary to the above-described attachment operation, the connecting shaft 21 is moved from the small diameter hole 24b to the large diameter hole 34a side while expanding the neck 34c, and then the connecting shaft 21 is moved from the small diameter hole 24b to the large diameter hole 34a, Hole 34
The operation is easy as it is only necessary to pull out the connecting shaft 34 from 5a.

With the hammock 18 attached to the cap body 2, the size band 19 is attached to the attachment portion 41 that is integrated with the hammock 18.
can be attached to the cap body 2.

That is, the attachment 48 is attached to the attachment part 41, and the locking part 54 at the tip of the attachment 48 is engaged with the engagement hole 49 of the size band 19. On this occasion,
The locking portion 49 is larger than the width of the engagement hole 49, but since the size band 19 is made of a flexible material and a plurality of holes 51 are provided around the periphery of the recess 50, the recess 50 can be easily bent. The locking portion 54 can be inserted into the engaging hole 49 while expanding the width thereof, and the bottom of the recess 50 can be held between the locking portion 54 and the attachment portion 41 for engagement. Therefore, with a simple structure, the cap body 2 with size band 19
It can be easily attached and detached.

In addition, when the size band 19 is attached to the cap body 2, the locking part 54 does not protrude inwardly from the inner surface of the size band 19, so that the locking part 54 does not touch the helmet wearer's head. There is no discomfort caused by strong contact. Also size band 1
Since the shaft portion 52 of the fixture 48 can slide within the engagement hole 49 when adjusting the circumference of size band 1,
Changes in the relative position between the mounting portion 9 and the mounting portion 41 are allowed, thus facilitating adjustment operations. Moreover, the diameter of the size band 19 changes as the circumference is adjusted, but this change is absorbed by the bending of the arm portion 40 of the hammock 18. Further, by providing the hole 51 at the periphery of the recess 50, sufficient flexibility is given to the size band 19, so that the size band 19 can be easily curved along the head and easily conforms to the head.

C. Effects of the invention As described above, according to the invention, an engagement hole extending in the circumferential direction of the helmet is formed in the size band whose circumference can be adjusted according to the head size of the helmet wearer, and the cap body The arm part integrally formed with the hammock that is engaged with the size band has a protruding shaft part that has a locking part at the tip that engages with the inner surface of the size band and is slidably inserted into the engagement hole. Therefore, the arm portion of the hammock can directly support the size band through the shaft portion and the engagement hole, and in order to support the size band, the band itself is not stretched to the extent that bending loads are easily applied, unlike the conventional method. There is no need to provide a special protrusion, and this increases the strength of the hammock arm to support the size band, making it possible to stably support the band over a long period of time, while also simplifying the structure of the size band itself. It is possible to aim for Further, the maximum adjustment amount of the circumferential length of the band can be extended by simply making the engagement hole to be drilled in the size band longer, so the extension setting is extremely easy.

In addition, since a sweat-proof member is supported at the bottom of the size band to cover the inner surface of the band and the inner end of the locking portion, it is possible to enhance the fit of the inner surface of the size band to the head, and also to improve the fit of the inner surface of the size band to the head. Even if some unevenness occurs on the inner surface of the size band due to the presence of the sweat-proof member, the foreign body sensation that the user feels due to the unevenness can be alleviated.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a front view, FIG. 2 is a side view taken in the direction of the arrow in FIG.
Figure 3 is a cross-sectional view taken along the - line in Figure 1, and Figure 4 is a cross-sectional view of Figure 2.
Fig. 5 is an exploded perspective view showing the internal structure of the cap body, Fig. 6 is a sectional view taken along the - line in Fig. 3, Fig. 7 is a - line view in Fig. 6, and Fig. 8 The figures are a sectional view taken along the - line in FIG. 7, FIG. 9 is a cross sectional view showing a state in which the size bands are combined, and FIG. 10 is a view taken along the - line in FIG. 6. 1... Helmet, 2... Cap body, 18... Hammock, 19... Size band, 40... Arm part,
45...Sweatproof member, 49...Engagement hole, 52...
Shaft portion, 54...Locking portion.

Claims (1)

[Scope of utility model registration request] The lower end of the cap body 2 is secured to a hammock 18 made of a flexible material that supports the head of the helmet wearer, and the hammock 18 has a circumferential length that is adjusted according to the size of the head of the helmet wearer. In a helmet integrally formed with an arm portion 40 for attaching a possible size band 19, the size band 19 is provided with an engagement hole 49 extending in the circumferential direction of the helmet, and the arm portion 40 has: A shaft portion 52 that has a locking portion 54 at its tip that engages with the inner surface of the size band 19 and is slidably inserted into the engagement hole 49.
The helmet is characterized in that a sweat stopper member 45 is provided below the size band 19 to cover the inner surface of the band 19 and the inner end of the locking portion 54.