JPH0421787Y2 - - Google Patents

Description

[Detailed description of the invention] Purpose of the invention (1) Industrial application field The present invention relates to a helmet in which a hammock for supporting the head of the helmet wearer is attached to the cap body.

(2) Conventional technology Conventionally, such helmets have been developed, for example, by
It is known from the publication No.-30920.

(3) Problems to be solved by the invention In the above-mentioned conventional method, the protrusion protruding from the cap body is inserted into the hole provided in the hammock, and the holding member that holds the hammock between the hammock body and the cap body is inserted through the hole. Since the protruding portion engages with the protrusion, the mounting structure is complicated.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a helmet which allows a hammock to be attached and detached from a cap body with a simple operation, and which has a simple structure and high durability.

B. Structure of the invention (1) Means for solving the problem In order to achieve the above object, the present invention provides a helmet in which a hammock for supporting the head of the helmet wearer is attached to the hat body. ,
A connecting shaft having an annular groove protrudes from the outer circumferential surface of the intermediate portion, and the lower end of the hammock formed of a flexible material has a large diameter hole through which the connecting shaft is inserted, and a large diameter hole in the annular groove. A pot-shaped locking hole in which a small diameter hole that can be engaged is connected via a neck narrower than the bottom diameter of the annular groove is bored with the large diameter hole located above the small diameter hole. An annular protrusion surrounding the locking hole is integrally formed on the side surface of the lower end of the hammock, and the inner peripheral surface of the portion of the annular protrusion surrounding the small diameter hole is provided with the distal end of the connecting shaft. The feature is that the outer periphery is fitted and supported.

(2) Effect According to the above structure, when attaching the hammock to the cap body, the connecting shaft is inserted into the large diameter hole and moved toward the small diameter hole to engage the annular groove with the small diameter hole. match. At this time, since the hammock is made of a flexible material, the neck can be expanded at the bottom of the annular groove when moving from the large diameter hole to the small diameter hole, making the engagement operation easy. Further, when removing the hammock from the cap body, the operation described above can be reversed, and the hammock can be easily removed from the cap body. Furthermore, when the helmet is installed, tension is applied upward to the hammock that receives the helmet wearer's head when the helmet is worn, causing the connecting shaft to move from the small-diameter hole to the large-diameter hole. This will not happen and the attached state will be maintained.

Further, since the annular protrusion surrounding the bell-shaped locking hole is integrated with the side surface of the lower end of the hammock, sufficient elasticity and strength are imparted to the peripheral edge of the locking hole of the hammock made of a flexible material. Furthermore, the annular protrusion,
The outer periphery of the tip of the connecting shaft is fitted and supported on the inner peripheral surface of the portion surrounding the small diameter hole, so that
This effectively prevents the lower end of the hammock from rattling or falling with respect to the connecting shaft axis.

(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.
A flange portion 5 projecting outward is integrally provided at the 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 male 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 part 10 has a plurality of parts, 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 each guide hole 12 in a protruding manner. Each engagement protrusion 13 includes 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 slide 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 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. The engagement protrusion 13 can be engaged with the guide hole 12 by resolving the diameter reduction state of the locking collar 15 when inserted into the 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. The small diameter hole portion 24b of the projection 25
The connecting shaft 21 is provided on the inner circumferential surface of the portion 25b surrounding the
The outer periphery of the distal end portion of the bracket 20 is fitted and supported, and this fitting support structure effectively prevents the bracket 20 from wobbling or falling with respect to the axis of the connecting shaft 21.

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 bottom diameter of the annular groove 36 is equal to the neck portion 34c.
The width of the connecting shaft 35 is set slightly larger than the width of the connecting shaft 35, and the outer periphery of the tip of the connecting shaft 35 is fitted and supported on the inner peripheral surface of the portion 38b of the protrusion 38 surrounding the small diameter hole 34b. This fitting support structure effectively prevents the lower end of the leg portion 33 from wobbling or from falling relative to the axis of the connecting shaft 21.

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 3
The tip of 1 is fastened with string 30, and string 3
By adjusting the degree of fastening of 0, it is possible to correspond to 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.
A size band 19 is detachably 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 while expanding the neck 34c, and then Diameter hole 3
The operation is easy as it is only necessary to pull out the connecting shaft 34 from 45a.

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, the cap body is provided with a connecting shaft having an annular groove on the outer surface, and the connecting shaft is provided at the lower end of the hammock made of a flexible material. A potbelly-shaped locking hole is formed by connecting a large-diameter hole that allows the insertion of the annular groove through the annular groove and a small-diameter hole that can engage with the annular groove through a neck that is narrower than the bottom diameter of the annular groove. Since the hole is located above the small-diameter hole, the engagement can be achieved by moving the annular groove of the connecting shaft relatively between the large-diameter hole and the small-diameter hole while bending the neck in the expansion direction. The stop hole and the connecting shaft can be easily engaged and detached, and the hammock can be attached to and detached from the cap body with a simple structure. Furthermore, in the attached state, the connecting shaft can be accurately held at a fixed position in the locking hole by the engagement between the neck and the bottom of the annular groove. Furthermore, when a helmet is worn, a load is applied to the hammock in the direction in which the connecting shaft engages with the small diameter hole, that is, in the direction in which it moves away from the large diameter hole and the neck, so the neck expands due to this load. There is no risk of being subjected to forces, and therefore there is no fear that the neck will sag prematurely due to the load.

Further, since the annular protrusion surrounding the bell-shaped locking hole is integrally formed on the side surface of the lower end of the hammock, even if the hammock is made of a flexible material,
Sufficient elasticity and strength can be imparted to the periphery of the locking hole of the hammock, and this, together with the aforementioned effect of preventing the neck from becoming sagging, can greatly contribute to improving durability.

Furthermore, since the outer periphery of the tip of the connecting shaft is fitted and supported on the inner peripheral surface of the ring surrounding the small diameter hole of the annular protrusion, the fitting support structure prevents the lower end of the hammock from wobbling. It is possible to effectively prevent the connecting shaft from collapsing with respect to the axis of the connecting shaft.

[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, 34... Locking hole, 34a... Large diameter hole portion,
34b...Small diameter hole part, 34c...Neck part, 35...
Connection shaft, 36... annular groove, 38... annular protrusion, 3
8b... part.

Claims (1)

[Scope of utility model registration request] In a helmet in which a hammock 18 for supporting the head of a helmet wearer is attached to a cap body 2, a connecting shaft 35 having an annular groove 36 on the outer peripheral surface is protruded from the inner surface of the cap body 2, and is made of a flexible material. The lower end of the hammock 18 formed by the above is provided with a large diameter hole 34a through which the connecting shaft 35 is inserted;
A potbell-shaped locking hole 34 in which a small-diameter hole 34b that can engage with the annular groove 36 is connected via a neck 34c narrower than the bottom diameter of the annular groove 36 connects the large-diameter hole 34a to a small-diameter hole. An annular protrusion 3 that is located above the portion 34b and surrounds the locking hole 34.
8 is integrally formed on the side surface of the lower end of the hammock 18, and the small diameter hole 34 of the annular protrusion 38
The connecting shaft 3 is provided on the inner circumferential surface of the portion 38b surrounding b.
5. A helmet characterized in that the outer periphery of the tip portion of No. 5 is fitted and supported.