JP2023103984A - Hammock for protective cap - Google Patents

Abstract

To provide a hammock for a protective cap which has a simple structure, has good air permeability, and can withstand an impact load.SOLUTION: There is provided a hammock 1 for a protective cap, including: a leg connecting portion 7; a plurality of hammock legs 9 extending from the leg connecting portion 7 in different directions; and a spacer 17 composed of a first projecting portion 51 projecting in a circumferential direction of an opening of a cap body 5 from distal ends of at least a pair of adjacent hammock legs among the plurality of hammock legs 9.SELECTED DRAWING: Figure 4

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hammock for a protective cap that is installed on the cap body of the protective cap.

BACKGROUND ART Conventionally, a hammock for a protective cap is known that includes a connecting portion (leg connecting portion) and a plurality of legs (hammock leg portions) extending from the connecting portion (see Patent Document 1).

Conventional hammocks for protective caps have a plurality of extensions extending from the connecting portion separately from the hammock legs in order to withstand impact loads, and these extensions are provided with shock absorbing structures. there is

In addition, in conventional hammocks for protective caps, a shock absorbing structure is provided in the legs, and the shock absorbing structure includes a tubular portion and a plate-shaped base connecting the tubular portion. It is configured. The base has a shape extending from the side edge of the leg, and the tubular portion is provided at the tip of the base in the extending direction.

Japanese Patent No. 6236567

By the way, in conventional hammocks for protective caps, a plurality of extensions extend from the leg connecting portion separately from the hammock legs, and these extensions are provided with shock absorbing structures, The structure is complicated, the ventilation is bad, and the weight is heavy.

In addition, in conventional hammocks for protective caps, a shock absorbing structure is provided in the legs, and the shock absorbing structure includes a tubular portion and a plate-shaped base connecting the tubular portion. It is configured. The base has a shape extending from the side edge of the leg, and the tubular portion is provided at the tip of the base in the extending direction. Even with such a configuration, the configuration is complicated, the air permeability is poor, and the weight is heavy.

SUMMARY OF THE INVENTION An object of the present invention is to provide a hammock for a protective cap which has a simple structure, good air permeability, light weight, and sufficient shock absorption.

The invention according to claim 1 comprises a leg connecting portion, a plurality of hammock legs extending from the leg connecting portion in mutually different directions, and one of the plurality of hammock legs adjacent to each other. A hammock for a protective cap, comprising a spacer composed of a first projecting portion projecting in the circumferential direction of the opening of the cap body from the distal ends of at least a pair of hammock legs.

According to a second aspect of the invention, there is provided a shock absorbing portion comprising a plurality of second protrusions protruding from at least one of the leg connecting portion and the hammock legs. A hammock for protective helmets.

According to the third aspect of the invention, the first protrusions constituting the spacer are provided between the pair of hammock legs on the front side and between the pair of hammock legs on the rear side. A hammock for a protective cap according to claim 1 or claim 2.

According to a fourth aspect of the invention, the first projecting portion constituting the spacer includes a plate-like main body portion and a projection protruding from the plate-like main body portion, 2. The thickness direction of the plate-like main body is the thickness direction of the meat of the spherical shell-shaped cap, and the projection protrudes toward the cap in the thickness direction of the plate-like main body. A hammock for a protective cap according to any one of claims 3 to 4.

According to the fifth aspect of the present invention, the projections of the plate-shaped main body are formed so as not to interfere with the feeling of wearing a hat in a normal wearing state by the first projections constituting the spacer. and a portion of the plate-shaped main body where the protrusion is not formed, a slit penetrating the plate-shaped main body in the thickness direction is provided. It is a hammock for the protective cap described in .

According to a sixth aspect of the present invention, the protrusions extend in the projecting direction of first protrusions that constitute the spacers at both ends in the width direction of the plate-like main body. is provided with a slit penetrating the plate-like main body in the thickness direction, and the slit is adjacent to the protrusion when viewed in the thickness direction of the plate-like main body 5. The hammock for a protective headgear according to claim 4, wherein the hammock extends along the protrusion.

According to a seventh aspect of the present invention, there is provided a shock absorbing portion composed of a plurality of second protrusions protruding from the hammock legs, and the tip surfaces of the second protrusions extend from the hammock legs. 2. The hammock for protective caps according to claim 1, wherein the hammock is oblique with respect to the extending direction of the part.

According to an eighth aspect of the invention, the height of the second protrusions protruding from the hammock legs is smaller on the tip end side in the extension direction of the hammock legs. A hammock for a protective cap according to claim 7, which is enlarged on the base end side.

In the ninth aspect of the invention, the plurality of second protrusions protrude from each of the plurality of hammock legs, and the plurality of second protrusions protruding from the hammock legs are The second protrusions are arranged at predetermined intervals in the extension direction of the hammock legs, and the rigidity of the second protrusions is greater on the distal end side in the extension direction of the hammock legs, and the extension of the hammock legs 8. The hammock for a protective headgear according to claim 7, wherein the hammock becomes smaller toward the base end side in the direction.

The invention according to claim 10, wherein the second protrusion is formed in a tubular shape, and the inside of the tube of at least a part of the second protrusions among the plurality of second protrusions 10. The hammock for a protective cap according to any one of claims 7 to 9, further comprising a projection projecting from the hammock leg portion in the same direction as the second projection portion.

ADVANTAGE OF THE INVENTION According to the present invention, it is possible to provide a hammock for a protective cap that has a simple structure, good air permeability, light weight, and sufficient shock absorption.

It is a figure which shows the protective helmet in which the hammock for protective helmets which concerns on embodiment of this invention is installed. It is a II arrow directional view in FIG. It is a III arrow directional view in FIG. 1 is a plan view of a hammock for a protective helmet according to an embodiment of the present invention; FIG. It is a rear view of a hammock for protective helmets according to an embodiment of the present invention. It is a figure which shows typically the relationship between the hammock for protective caps and cap body which concern on embodiment of this invention. It is a perspective view which shows the spacer provided in the hammock for protective caps which concerns on embodiment of this invention, (a) has shown the rear side spacer, (b) has shown the front side spacer. FIG. 3 is a diagram showing the impact absorption performance of a protective cap provided with a hammock for a protective cap according to an embodiment of the present invention; FIG. 3 is a diagram showing the impact absorption performance of a protective cap provided with a hammock for a protective cap according to an embodiment of the present invention; FIG. 4 is a diagram showing a simplified configuration of a rear spacer provided in a hammock for a protective cap according to an embodiment of the present invention, together with a cap. (b) is an XB arrow directional view in (a). (c) is a diagram corresponding to (b), in which the positional relationship between the cap body and the spacer provided in the hammock for the protective cap according to the embodiment of the present invention (different from the case of (b)) is a diagram showing a positional relationship). FIG. 4 is a diagram showing a simplified form of spacers provided in the hammock for protective caps according to the embodiment of the present invention. (a) to (e) are trigonometry of spacers. (f) is a view corresponding to (e), showing the plate-like main body of the spacer more accurately. (a) is a perspective view showing a spacer according to a first modification, and (b) is a perspective view showing a spacer according to a second modification. It is a figure which shows the spacer which concerns on the 3rd modification, (b) is a XIIIB arrow directional view in (a), (c) is a XIIIC arrow directional view in (a). 5 is a view similar to FIG. 4, but showing a mode in which the spacer protrudes from the locked portion at the tip of the hammock leg; FIG. (a) is an enlarged view of the XVA section in FIG. 14, (b) is an XVB arrow view in (a), and (c) is an XVC arrow view in (a). (a) is an enlarged view of the XVIA section in FIG. 14, (b) is a view from the XVIB arrow in (a), and (c) is a view from the XVIC arrow in (a). FIG. 10 is a view showing a spacer according to a fourth modification, and is a view of the protective cap 3 viewed from the opening side of the cap body 5. FIG. FIG. 15 is a plan view of a hammock for a protective cap according to a first modification, which corresponds to FIGS. 4 and 14; (a) is an enlarged view of the XIXA section in FIG. 18, (b) is a view from the XIXB arrow in (a), and (c) is a view from the XIXC arrow in (a). (a) is an enlarged view of the XXA part in FIG. 18, (b) is a XXB arrow view in (a), and (c) is a XXC arrow view in (a). FIG. 19 is a diagram showing a cross section taken along line XXI-XXI in FIG. 18; FIG. 19 is a view showing the XXII-XXII section in FIG. 18; 21. It is a figure which shows the positional relationship of the impact-absorbing part shown in FIG. 21, and a cap. FIG. 11 is an exploded view of a headband installed in a hammock for a protective cap according to a second modified example; FIG. 5 is a plan view of a hammock for a protective cap according to a second modification, corresponding to FIG. 4; 26 is an enlarged view of the XXVI section in FIG. 25; FIG.

A hammock 1 for a protective cap according to an embodiment of the present invention is installed inside a bowl-shaped cap body 5 of a protective cap (helmet; industrial helmet) 3 as shown in FIGS. It is a thing. In addition, hereinafter, the "hammock for protective cap" may be simply referred to as "hammock".

The cap body 5 of the protective cap 3 is made of a material such as a hard synthetic resin having rigidity that can be regarded as a rigid body, and is formed in a bowl shape with a predetermined thickness. Since the cap body 5 is integrally formed of a material such as a synthetic resin that can be regarded as a rigid body, for example, even if a person hits the cap body 5 with bare hands, the deformation of the cap body 5 can be recognized with the naked eye. It is designed not to

The hammock 1 is integrally formed of a material such as synthetic resin having lower rigidity than the cap body 5 . That is, the hammock 1 is made of a material that is more elastic than the cap body 5 and deforms (for example, elastically deforms) due to the impact force received by the cap body 5 .

A hammock 1 for a protective cap is configured to include leg connecting portions 7, hammock leg portions 9, and spacers (wing-shaped spacers) 17, as shown in FIGS. A plurality of hammock legs 9 are provided, and the plurality of hammock legs 9 extend in directions different from each other in directions away from the leg connecting portion 7 . That is, a plurality of hammock legs 9 (eg, eight hammock legs 9A to 9H) extend radially from the outer edge of the leg connecting portion 7 with the leg connecting portion 7 as the center for a predetermined length. there is

The spacer 17 is provided to prevent the head of the wearer of the protective cap 3 from coming into contact with the cap 5 when the cap 5 receives an impact. there is As shown in FIGS. 4 and 5, the first projecting portion 51 is formed at the tips of at least a pair of adjacent hammock legs (9A, 9H; 9D, 9E) among the plurality of hammock legs 9. protruding from the part. More specifically, when the hammock 1 for a protective cap is installed on the cap body 5, the first protrusion 51 extends from the tip of the hammock leg 9 to the opening of the cap body 5, as shown in FIG. 13 (the direction in which the outer circumference of the opening 13 extends). Note that the spacers 17 may be provided on the hammock legs 9 other than the hammock legs (9A, 9H; 9D, 9E).

Here, the distal end portion of the hammock leg portion 9 is the distal end portion of the hammock leg portion 9 in the extending direction (extending direction) (the end portion on the side opposite to the leg connecting portion 7). To explain further, the distal end of the hammock leg 9 is the distal end of the hammock leg 9 excluding a locked portion 27 (see FIG. 4, etc.), which will be described later in detail. Here, the hammock leg portion 9 includes a hammock leg main portion extending from the leg connecting portion 7 and a locked portion 27 further extending from the tip of the hammock leg main portion. Suppose you are By doing so, the first protrusion 51 protrudes from the tip of the hammock leg main body. In addition, although the first projecting portion 51 projects from the hammock leg portion 9 , it may project from the locked portion 27 . Also, in the above description, the tip of the hammock leg 9 does not include the locked portion 27 , but the tip of the hammock leg 9 may be the locked portion 27 . That is, the hammock leg portion 9 may include the locked portion 27 .

The first protruding portion 51 protrudes only from the tip portion (portion from the tip to the vicinity thereof) of the hammock leg portion 9 (hammock leg body portion), and the intermediate portion of the hammock leg portion 9 (the intermediate portion in the extension direction). part), and does not protrude from the base end of the hammock leg 9 (the base end in the extending direction). A plurality of first projecting portions 51 may be provided in both the hammock leg portion 9 (a portion other than the engaged portion 27) and the engaged portion 27, or the like.

Also, as shown in FIGS. 3 and 4, the first protrusions 51 (51A and 51H) are arranged between the pair of hammock legs 9A and 9H so as to extend from the pair of hammock legs 9A and 9H. They protrude so as to face each other.

One first projecting portion 51A that constitutes the spacer 17 protrudes (extends) from the tip of one of the pair of hammock legs 9A and 9H adjacent to each other. . Further, the first protrusion 51A protrudes by a predetermined length toward the other hammock leg 9H in the circumferential direction of the outer periphery of the opening 13 of the cap body 5 .

The other first protrusion 51H that constitutes the spacer 17 protrudes (extends) from the tip of the other hammock leg 9H of the pair of adjacent hammock legs 9A and 9H. . Further, the first protrusion 51H protrudes by a predetermined length toward one hammock leg 9A in the circumferential direction of the outer circumference of the opening 13 of the cap body 5 . The tip of the first projecting portion 51A and the tip of the first projecting portion 51H are separated from each other.

Another first protrusion 51 (51D, 51E) is provided between the pair of hammock legs 9D, 9E in the same manner as the first protrusions 51A, 51H. are protruding from each of them so as to face each other.

Suppose an impact force is applied to the cap body 5 while the person is wearing the protective cap 3 in which the hammock 1 and the headband 31 (see FIG. 2) are installed on the cap body 5 . At this time, the spacer 17 is configured to keep a gap so that the head of the person wearing the cap does not come into contact with the cap body 5. - 特許庁Details of the headband 31 will be described later.

To explain further, when an impact force is applied to the outer surface of the cap body 5 toward the inside of the cap body 5 (toward the human head) while the person is wearing the protective cap 3, the spacer 17 separates the cap body 5 and the human head. A gap is maintained by being sandwiched between This protects the human head.

In addition, when an impact force is applied to the outer surface of the cap body 5 toward the inside (human head side) of the cap body 5 while the person is wearing the protective cap 3 , the spacer 17 and the headband 31 will be in contact with the cap body 5 . The spacer 17 is sandwiched with the human head to maintain a gap and protect the human head. In this embodiment, the spacer 17 is positioned on the cap body 5 side, and the headband 31 is positioned on the human head side.

It should be noted that the energy of the impact force described above is not absorbed by the spacers 17 alone. The deformation (slight elastic deformation) of the leg connecting portion 7, the hammock legs 9, the headband 31, and the impact absorbing portion 11 (see FIGS. 4 and 6) provided in the hammock 1 also causes impact force. of energy is absorbed.

The impact absorbing portion 11 is composed of a plurality of second projecting portions 15 projecting from the leg connecting portion 7 and the hammock leg portion 9 . In the hammock 1, as described above, the leg connecting portion 7, the hammock leg portion 9, the first projecting portion 51, the second projecting portion 15, and the like are integrally molded of synthetic resin. Note that the leg connection portion 7, the hammock leg portion 9, the first projecting portion 51 and the second projecting portion 15 may be formed separately and connected to each other by welding or the like.

Also, as already understood, the first protrusion 51 is provided between the front pair of hammock legs 9A and 9H and between the rear pair of hammock legs 9D and 9E. .

One hammock leg 9A of the pair of front hammock legs 9A and 9H is the front left hammock leg, and the other hammock leg 9H of the pair of front hammock legs 9A and 9H is the front right hammock. Let it be the leg. One first projecting portion 51A constituting the spacer 17 is defined as a front left first projecting portion, and the other first projecting portion 51H constituting the spacer 17 is defined as a front right first projecting portion. The front left first protrusion 51A protrudes from the tip of the front left hammock leg 9A toward the front right hammock leg 9H. The front right first protrusion 51H protrudes from the tip of the front right hammock leg 9H toward the front left hammock leg 9A.

One hammock leg 9D of the pair of rear hammock legs 9D and 9E is the rear left hammock leg, and the other hammock leg 9E of the pair of rear hammock legs 9D and 9E is the rear hammock leg. This is the right hammock leg. One first projecting portion 51D constituting the spacer 17 is defined as a rear left first projecting portion, and the other first projecting portion 51E constituting the spacer 17 is defined as a rear right first projecting portion. The rear left first protrusion 51D protrudes from the tip of the rear left hammock leg 9D toward the rear right hammock leg 9E. The rear right first protrusion 51E protrudes from the tip of the rear right hammock leg 9E toward the rear left hammock leg 9D.

Here, the first projecting portion 51 constituting the rear spacer 17 will be described in detail with reference to FIGS. 7(a), 10 and 11. FIG. The first projecting portion 51 includes a plate-like body portion (spacer body portion) 53 and a projection 55 projecting from the plate-like body portion 53 . The thickness direction of the plate-shaped body portion 53 is the thickness direction of the bowl-shaped cap body 5 . The protrusion 55 protrudes toward the cap body 5 in the thickness direction of the plate-like body portion 53 . The protrusions 55 protrude from two locations on both ends of the plate-shaped body portion 53 in the width direction.

For example, the plate-like body portion 53 is formed in a rectangular plate shape, and the protrusion 55 is formed in a columnar shape such as a square columnar shape, and the protrusion 55 is smaller than the plate-like body portion 53 .

The thickness dimension of the plate-like body portion 53 is approximately the same as the thickness dimension value of the hammock leg portion 9 . For example, the value of the thickness dimension of the plate-like body portion 53 with respect to the value of the thickness dimension of the hammock legs 9 is within the range of 0.5 to 4 (more preferably 0.8 to 2).

The width dimension of the plate-like main body 53 is approximately the same as the width dimension of the hammock legs 9 . For example, the value of the width dimension of the plate-like main body with respect to the value of the width dimension of the hammock legs is within the range of 0.5 to 3 (more preferably 0.8 to 1.5). The width direction of the plate-shaped body portion 53 is a direction orthogonal to the projection direction of the first projecting portion 51 and the thickness direction of the plate-shaped body portion 53 . The width direction of the plate-shaped body portion 53 is the vertical direction in FIGS.

The length dimension of the plate-shaped body portion 53 (the dimension of projection from the hammock leg portion 9) is slightly larger than the width dimension value of the hammock leg portion 9. As shown in FIG. The projection dimension of the plate-like main body 53 from the hammock leg portion 9 is the projection dimension of the portion (the portion of the plate-shaped main body portion 53) excluding the hammock leg joining portion 63, which will be described later. The value of the length dimension of the plate-like main body 53 with respect to the value of the width dimension of the hammock legs 9 is within the range of 1.1 to 4 (more preferably 1.2 to 2.5). The width direction of the hammock legs 9 is the horizontal direction in FIGS. 10(a), 11(b) and (e).

Also, the value of the protrusion 55 from the plate-like main body 53 is about the same as the thickness of the hammock leg 9 or slightly larger than the thickness of the hammock leg 9. It's becoming For example, the value of the projection dimension of the projection 55 with respect to the value of the thickness dimension of the hammock leg 9 is within the range of 1 to 10 (more preferably 0.8 to 5).

The width dimension of the projection 55 is sufficiently smaller than the width dimension of the hammock leg 9 . For example, the value of the width dimension of the projection 55 with respect to the value of the width dimension of the hammock legs 9 is within the range of 0.1 to 1.3 (more preferably 0.1 to 0.3). The width direction of the protrusion 55 is the vertical direction in FIGS. 10(a), 11(b) and (e), and is the horizontal direction in FIGS. 11(c) and 11(d).

When an impact force is applied to the protective cap 3 (cap body 5), the protrusion 55 is deformed so that the amount of protrusion from the plate-like body portion 53 is reduced, and the plate-like body portion 53 is mainly , the beam may flex. The heights of the projections 55 at the two locations are different from each other, and the heights may be along the inner surface of the cap body 5 .

Moreover, as shown in FIG. 7 and the like, the spacer 17 is provided with a slit 57 . The slit 57 is provided so as to reduce contact with the human head during normal wearing.

The slit 57 is provided between a portion of the plate-shaped main body portion 53 where the projection 55 is formed and a portion of the plate-shaped main body portion 53 where the projection 55 is not formed. Moreover, the slit 57 penetrates the plate-like body portion 53 in the thickness direction.

More specifically, the slit 57 is formed in a portion of the plate-like main body 53 where the protrusion 55 is not formed, and is formed between the portion of the plate-like main body 53 where the protrusion 55 is formed and the plate-like main body. It is adjacent to the boundary with the part where the protrusion 55 of the part 53 is not formed. In addition, the slit 57 is separated from the boundary between the portion of the plate-shaped main body portion 53 where the projections 55 are formed and the portion of the plate-shaped main body portion 53 where the projections 55 are not formed. may be formed in a portion where the protrusion 55 is not formed. Also, the slit 57 may not be provided.

The protrusions 55 extend in the direction in which the first protrusions 51 forming the spacer 17 protrude from both widthwise end portions of the plate-like body portion 53 . One end of the projection 55 in the longitudinal direction is located near the hammock leg 9 or the engaged portion 27 when viewed in the thickness direction of the plate-like main body 53 . The other end in the longitudinal direction of the projection 55 is located at the tip in the longitudinal direction of the plate-like body portion 53 (the end opposite to the hammock leg portion 9).

In addition, when viewed in the thickness direction of the plate-like body portion 53 , a slit 57 extends along the protrusion 55 adjacent to the protrusion 55 inside the protrusion 55 in the width direction of the plate-like body portion 53 . As shown in FIG. 10(a), one longitudinal end of the slit 57 (left end in FIG. 10(a)) is located at one longitudinal end (left end) of the protrusion 55 (on one end side). near one end). The other longitudinal end (right end) of the slit 57 is positioned closer to one longitudinal end (left end) of the protrusion 55 than the other longitudinal end (right end) of the protrusion 55 .

One end in the longitudinal direction of the protrusion 55 is located on the proximal side of the first protrusion 51 constituting the spacer 17 (the proximal side in the protrusion direction of the first protrusion 51; the hammock leg 9 side). ). The other end in the longitudinal direction of the protrusion 55 is on the tip side of the first protrusion 51 constituting the spacer 17 (the tip side in the protrusion direction of the first protrusion 51; opposite to the hammock leg 9). located in

Here, the protective cap 3 will be explained in more detail.

The hammock legs 9 extend from the leg connecting portion 7 in a strip shape. The cross-sectional shape of the hammock legs 9 (the cross-sectional shape of a plane orthogonal to the extending direction of the hammock legs 9) is an elongated rectangular shape in which the width dimension is considerably larger than the thickness dimension. It has become. 4 and 5 is the thickness direction of the leg connecting portion 7. As shown in FIG.

When the hammock 1 is installed on the bowl-shaped cap body 5 of the protective cap 3 , the thickness direction of the hammock legs 9 substantially coincides with the thickness direction of the bowl-shaped cap body 5 . Further, when the hammock 1 is installed on the bowl-shaped cap body 5 of the protective cap 3 , the width direction of the hammock legs 9 substantially coincides with the circumferential direction of the opening 13 of the bowl-shaped cap body 5 .

Here, the hemispherical shell shape will be explained. It can also be said that the bowl-shaped cap body 5 is generally formed in the shape of a hemispherical shell. Since the cap body 5 is formed in the shape of a hemispherical shell, an annular opening (substantially circular edge) 13 is formed at the lower end of the cap body 5 .

A hemispherical shell is defined as two spheres obtained by dividing a spherical shell-like solid formed by removing a second sphere of a given radius from a first sphere of a given radius by a given plane. It is the shape of one of the solids. The value of the radius of the second sphere is slightly smaller than the value of the radius of the first sphere, and the center of the first sphere and the center of the second sphere coincide with each other. . Also, the predetermined plane includes the center of the first sphere and the center of the second sphere. The thickness of the bowl-shaped cap body 5 is the difference between the radius of the first sphere and the radius of the second sphere.

Further, the cap body 5 has an appropriate shape corresponding to the shape of the human head. That is, the cap body 5 is not formed in the shape of a perfect hemispherical shell, but has a hemispherical shell shape close to the shape of a hemispherical shell.

As shown in FIGS. 1, 4, etc., the impact absorbing portion 11 is composed of a plurality of projecting portions 15 (15A to 15L, 15Aa to 15Ha). A plurality of protruding portions 15 (15A to 15L, 15Aa to 15Ha) are provided apart from each other and protrude from the leg connecting portion 7 and the hammock legs 9. As shown in FIG.

When the hammock 1 is installed on the cap body 5 of the protective cap 3, the plurality of projecting portions 15 (15A to 15L, 15Aa to 15Ha) constituting the shock absorbing portion 11 are connected to the leg connecting portion 7 and the hammock legs. It protrudes from the portion 9 toward the inner surface side (generally upward) of the cap body 5 (see FIGS. 1 and 6).

The first projecting portion 51 (plate-shaped body portion 53) constituting the leg connecting portion 7, the hammock leg portion 9, and the spacer 17 shown in FIGS. It has a small constant thickness in the orthogonal direction. The thicknesses of the leg connecting portion 7, the hammock leg portion 9 and the first projecting portion 51 are substantially the same.

Here, the hammock 1 will be described in more detail with reference to FIGS. 4 and 5. FIG.

The leg connecting portion 7 includes an inner annular portion 21 with a small diameter, an outer annular portion 23 with a large diameter, and an inner annular portion 21 and an outer annular portion 23 between the inner annular portion 21 and the outer annular portion 23 . It is configured with a plurality of connecting portions 25 connecting to the annular portion 23 .

The hammock leg portion 9A extends from the left front portion (front portion) of the outer annular portion 23 in the front left front direction (front left oblique direction). The hammock leg portion 9B extends from the left front side portion (left side portion) of the outer annular portion 23 in the left front direction (diagonally to the right front from the left).

The hammock leg portion 9C extends from the left rear portion (left side portion) of the outer annular portion 23 toward the left side in the left rear direction (diagonally to the right side from the left side). The hammock leg portion 9D extends from the left rear portion (rear portion) of the outer annular portion 23 in the rear left rearward direction (rearward left rear oblique direction).

Hammock legs 9E-9H also extend from outer annular portion 23 in the same manner as hammock legs 9A-9D. As shown in FIGS. 4 and 5, the hammock 1 is formed symmetrically (laterally symmetrical) with respect to a straight line passing through the center and extending in the front-rear direction.

Further, at the tip of each of the hammock legs 9, there is provided a locked portion 27 for installing the hammock 1 on the cap body 5 of the protective cap 3. As shown in FIG. As shown in FIG. 3 and the like, each of the engaged portions 27 of the hammock 1 is engaged with each of the engaging portions 28 provided on the cap body 5, so that the hammock 1 is secured to the engaged portion. The hammock 1 is integrated with the cap body 5 at 27 so that the hammock 1 is installed on the cap body 5. - 特許庁

Between the hammock legs 9A and 9B, between the hammock legs 9C and 9D, between the hammock legs 9E and 9F, and between the hammock legs 9G and 9H. A head hand setting portion 29 is provided between them. The head hand installation part 29 is for installing an annular headband 31 (see FIG. 2) on the hammock 1 . 1 and 3, illustration of the headband 31 is omitted.

The second projecting portion 15 constituting the impact absorbing portion 11 is formed in a tubular shape such as a square tubular shape or a cylindrical shape. As can be seen from FIGS. 4 and 6, the extension direction of the central axis of the tube of the second projecting portion 15 coincides (generally coincides) with the thickness direction of the leg connecting portion 7 and the hammock leg portion 9. ing.

As shown in FIG. 4, protrusions 15I to 15L among the plurality of protrusions 15 protrude from the leg connecting portion 7. As shown in FIG. More specifically, one protruding portion 15 protrudes from each of a plurality of (for example, four) connecting portions 25 constituting the leg connecting portion 7 .

More specifically, the first connecting portion 25A of the four connecting portions 25 connects the inner annular portion 21 and the outer annular portion 23 at the front in the front-rear direction and at the central portion in the left-right direction. One protruding portion 15I protrudes from the first connecting portion 25A (including the portion of the annular portions 21 and 23 near the connecting portion 25A).

The second connecting portion 25B connects the inner annular portion 21 and the outer annular portion 23 at the rear in the front-rear direction and at the central portion in the left-right direction. One protruding portion 15J protrudes from the second connecting portion 25B (including the portion of the annular portions 21 and 23 near the connecting portion 25B).

The third connecting portion 25C connects the inner annular portion 21 and the outer annular portion 23 at the central portion in the front-rear direction and the left in the left-right direction. One protruding portion 15K protrudes from the third connecting portion 25C (including the portion of the annular portions 21 and 23 near the connecting portion 25C).

The fourth connecting portion 25D connects the inner annular portion 21 and the outer annular portion 23 at the central portion in the front-rear direction and the right side in the left-right direction. One protruding portion 15L protrudes from the fourth connecting portion 25D (including the portion of the annular portions 21 and 23 near the connecting portion 25D).

The connecting portion 25 connecting the inner annular portion 21 and the outer annular portion 23 may be provided in another form. In addition, a plurality of the second protrusions 15I to 15L may be provided other than four, and the second protrusions 15I to 15L may protrude from the inner annular portion 21 or the outer annular portion 23. may Furthermore, one connection portion 25 may be provided with a plurality of second projecting portions 15 .

Protrusions 15A to 15H and 15Aa to 15Ha of the plurality of second protrusions 15 protrude from the plurality of hammock legs 9, respectively. A plurality of (for example, two) projections 15 project from one hammock leg 9 . In addition, the structure which the one protrusion part 15 protrudes from the one hammock leg part 9 may be sufficient.

The protruding portion 15A of the hammock leg portion 9A is located at the center portion of the hammock leg portion 9A in the extending direction (the intermediate portion between the leg connecting portion 7 and the second bridge portion extending portion 17Ab and the second bridge portion extending portion). 17Ab). The protruding portion 15Aa of the hammock leg portion 9A protrudes further toward the distal end than the protruding portion 15A in the extending direction of the hammock leg portion 9A.

The protruding portion 15B of the hammock leg portion 9B protrudes from the intermediate portion (the portion on the leg connecting portion 7 side) of the hammock leg portion 9B in the extending direction. The protruding portion 15Ba of the hammock leg portion 9B protrudes further toward the distal end than the protruding portion 15B in the extending direction of the hammock leg portion 9B. The protruding portion 15C of the hammock leg portion 9C protrudes from the intermediate portion (the portion on the leg connecting portion 7 side) of the hammock leg portion 9C in the extending direction. The protruding portion 15Ca of the hammock leg portion 9C protrudes further toward the distal end than the protruding portion 15C in the extending direction of the hammock leg portion 9C.

The projecting portion 15D of the hammock leg portion 9D is located at the center portion of the hammock leg portion 9D in the extending direction (the intermediate portion between the leg connecting portion 7 and the first bridge portion extending portion 17Ba and the first bridge portion extending portion). 17Ba). The protruding portion 15Da of the hammock leg portion 9D protrudes further toward the distal end than the protruding portion 15D in the extending direction of the hammock leg portion 9D.

The protruding portion 15E of the hammock leg portion 9E is located at the center portion of the hammock leg portion 9E in the extending direction (the intermediate portion between the leg portion connecting portion 7 and the second bridge portion extending portion 17Bb). 17Bb). The protruding portion 15Ea of the hammock leg portion 9E protrudes further toward the distal end than the protruding portion 15E in the extending direction of the hammock leg portion 9E.

The protruding portion 15F of the hammock leg portion 9F protrudes from the intermediate portion (the portion on the leg connecting portion 7 side) of the hammock leg portion 9F in the extending direction. The protruding portion 15Fa of the hammock leg portion 9F protrudes further toward the distal end than the protruding portion 15F in the extending direction of the hammock leg portion 9F. The protruding portion 15G of the hammock leg portion 9G protrudes from the intermediate portion (the portion on the leg connecting portion 7 side) of the hammock leg portion 9G in the extending direction. The protruding portion 15Ga of the hammock leg portion 9G protrudes further toward the distal end than the protruding portion 15G in the extending direction of the hammock leg portion 9G.

The projecting portion 15H of the hammock leg portion 9H is located at the center portion of the hammock leg portion 9H in the extending direction (the intermediate portion between the leg connecting portion 7 and the first bridge extending portion 17Aa and the first bridge extending portion). 17Aa). The protruding portion 15Ha of the hammock leg portion 9H protrudes further toward the distal end than the protruding portion 15H in the extending direction of the hammock leg portion 9H.

When the hammock 1 is installed on the cap body 5 of the protective cap 3, the locked portion 27 of the hammock 1 is in contact with the cap body 5 as shown in FIG. 15) are located inside the cap body 5 and are separated from the cap body 5. It should be noted that the hammock 1 is curved along the shape of the cap 5 when the hammock 1 is installed on the cap 5 . Moreover, in a state in which the hammock 1 is installed on the cap 5 of the protective cap 3 , at least some of the plurality of protrusions 15 may be in contact with the cap 5 . Details of the positional relationship between the first projecting portion 51 constituting the spacer 17 and the cap body 5 when the hammock 1 is installed on the cap body 5 of the protective cap 3 will be described later.

The plate-shaped main body portion 53 of the first projecting portion 51 that constitutes the spacer 17 has a thickness dimension value that is thin at a portion (base end portion) 59 on the hammock leg portion 9 side and is thin at a distal end side portion. The portion 61 is thickened. The value of the thickness dimension of the distal end portion 61 is constant, but the thickness of the proximal end portion 59 gradually increases with increasing distance from the hammock leg portion 9 . The first projecting portion 51 is formed in a rectangular plate shape, and is connected to the hammock leg portion 9 by a hammock leg joining portion 63 that is thinner than the base end portion 59 .

The thickness of the distal portion 61 is the same as the thickness at the boundary between the proximal portion 59 and the distal portion 61, and the thickness of the hammock leg joint portion 63 is equal to the thickness of the distal portion 61. It matches the thickness at the border with the hammock leg joints 63 .

The width dimension of the plate-like body portion 53 of the first protrusion 51 is constant in the first protrusion 51 shown in FIGS. 7A, 10, and 11A to 11E. ing. Here, as shown in FIG. 11( f ), similarly to the thickness of the plate-like body portion 53 , the width dimension of the plate-like body portion 53 is narrow at the proximal side portion 59 and is narrow at the distal end side. may be widened at a portion 61 of .

As shown in FIGS. 7A and 11, the protrusion 55 is configured to include a low protruding portion 65 and a high protruding portion 67 connected to the low protruding portion 65 in the extending direction of the first protruding portion 51. It is The low protruding portion 65 is provided over the intermediate portion and the base end portion of the first protruding portion 51 in the extending direction of the first protruding portion 51 . The high protruding portion 67 is provided at the tip portion of the first protruding portion 51 in the extending direction of the first protruding portion 51 .

In addition, a projection 55 is formed on the first projecting portion 51 constituting the spacer 17 on the front side as shown in FIG. 7(b). The protrusion 55 shown in FIG. 7(b) differs from the protrusion 55 shown in FIG. 7(a) in that the high protrusion portion 67a extends continuously in the width direction of the first protrusion 51. As shown in FIG. The projection of the first projecting portion 51 that constitutes the spacer 17 on the front side may be configured as shown in FIG. The projection of the projecting portion 51 may be configured as shown in FIG. 7(b).

Here, the positional relationship between the first projecting portion 51 constituting the spacer 17 and the cap body 5 will be described with reference to FIG. 10 .

When the hammock 1 is installed on the cap body 5 of the protective cap 3, the first protrusion 51 constituting the spacer 17 is slightly separated from the inner wall of the cap body 5 (see FIG. 10(b)). In addition, as shown in FIG. 10(c), at least part of the first projecting portion 51 may be in contact with the inner wall of the cap body 5, or both of the projections 55 of the first projecting portion 51 may be in contact with the cap body. 5, or may be the same as the thickness dimension of the body portion 53. As shown in FIG. In any case, the first projecting portion 51 constituting the spacer 17 prevents the human head from coming into contact with the cap body when the cap body 5 receives an impact.

Next, installation of the hammock 1 on the hat body 5 will be described.

First, the wearing body with the headband 31 installed on the hammock 1 is installed on the cap body 5 together with the chin strap to obtain the protective cap 3 (see FIG. 2).

When an impact load is applied to the cap body 5 while the person is wearing the protective cap 3, the cap body 5 and the second projecting portion 15 come into contact with each other and the projecting portion 15 is deformed. is absorbed.

Here, test results of impact absorption performance of the protective cap 3 will be described with reference to FIGS. 8 and 9. FIG. This test was conducted based on Article 8 of the Handbook of the Safety and Health Law (published by Labor Research Institute) 2015 edition (II).

The horizontal axes in FIGS. 8 and 9 indicate the passage of time. The vertical axis in FIGS. 8 and 9 indicates the value of the impact force applied to the head. A straight line LA shown in FIGS. 8 and 9 indicates the permissible value of the impact force. FIG. 8 shows test results of the protective cap 3 processed at low temperature, and FIG. 9 shows test results of the protective cap 3 processed at high temperature.

A diagram L8a shown in FIG. 8(a) is the result when an impact force is applied to the back of the cap body 5. FIG. The maximum value in the diagram L8a is 2.6 kN (kilonewtons), which is below the allowable value of 9.81 kN.

A diagram L8b shown in FIG. 8(b) is the result when an impact force is applied to the forehead of the cap body 5. As shown in FIG. The maximum value in the diagram L8b is 4.2 kN (kilonewtons), which is below the allowable value of 9.81 kN.

A diagram L9a shown in FIG. 9(a) is the result when an impact force is applied to the back of the cap body 5. FIG. The maximum value in the diagram L8a is 3.7 kN (kilonewtons), which is below the allowable value of 9.81 kN.

A diagram L9b shown in FIG. 9(b) is the result when an impact force is applied to the forehead of the cap body 5. As shown in FIG. The maximum value in the diagram L9b is 5.2 kN (kilonewtons), which is below the allowable value of 9.81 kN.

A hammock 1 for a protective cap is provided with a spacer 17. - 特許庁The spacer 17 is composed of a first protrusion 51 that protrudes in the circumferential direction of the outer circumference of the opening 13 of the cap body 5 from the distal ends of at least a pair of adjacent hammock legs 9 . This simplifies the structure of the hammock 1, improves ventilation, and reduces weight.

In addition, in the hammock 1 for a protective cap, the plurality of second projecting portions 15 constituting the shock absorbing portion 11 protrude from the leg connecting portion 7 and the hammock legs 9, so that the hammock 1 has shock absorbing properties. ing. In particular, when an impact force directed from the top to the bottom is applied to the cap body 5, the impact force directed from the top to the bottom can be appropriately softened by the impact absorbing portion 11. - 特許庁

In addition, in the hammock 1 for a protective cap, the first projecting portion 51 constituting the spacer 17 is located between the pair of front hammock legs 9A and 9H and between the pair of rear hammock legs 9D and 9E. is provided between As a result, when an impact force directed toward the front side (front oblique upper side) or the rear side (rear oblique upper side) is applied to the cap body 5, the projecting portion 15 is deformed to appropriately soften the impact force. A person's head can be prevented from coming into contact with the cap body 5. - 特許庁Note that the above-described impact force directed toward the diagonally upper front and the diagonally upper rear is an impact force that occurs less frequently when the protective cap 3 is in use.

Further, in the hammock 1 for a protective cap, the first projecting portion 51 of the spacer 17 includes a plate-like body portion 53 and a projection (small projection) 55 projecting from the plate-shaped body portion 53. It is The thickness direction of the plate-shaped body portion 53 is the thickness direction of the bowl-shaped cap body 5 , and the projection 55 extends toward the cap body 5 side in the thickness direction of the plate-shaped body portion 53 . Protruding. Thereby, the value of the dimension (thickness dimension) of the spacer 17 in the thickness direction of the bowl-shaped cap body 5 can be reduced. Moreover, since the projection 55 is provided, a gap can be maintained between the human head and the cap body 5 by the spacer 17 .

In addition, in the hammock 1 for a protective cap, a plate-like structure is provided between a portion of the plate-like body portion 53 where the protrusions 55 are formed and a portion of the plate-like body portion 53 where the protrusions 55 are not formed. A slit 57 is provided through the body portion 53 in the thickness direction.
In addition, the spacer 17 reduces the contact with the human head in the normal wearing state, so that the feeling of wearing can be improved.

Moreover, in the hammock 1 for a protective cap, the projections 55 extend in the projecting direction of the first projections 51 that constitute the spacers 17 at both ends in the width direction of the plate-like main body 53 . The plate-like body portion 53 is provided with a slit 57 penetrating the plate-like body portion 53 in the thickness direction. A slit 57 extends along the projection 55 adjacent to the projection when viewed in the thickness direction of the plate-like body portion 53 . As a result, the wearing feeling in the normal wearing state can be improved.

Here, the spacer 17a according to the first modification will be described with reference to FIG. 12(a).

The first projecting portion 51 constituting the spacer 17a includes a plate-like main body portion 53 and a plate-like protrusion 55 . The thickness direction of the plate-shaped body portion 53 is the thickness direction of the spherical shell-shaped cap body 5 .

A plurality of projections 55 are formed in a rectangular plate shape and provided. ) at predetermined intervals. The projection 55 extends long in a direction connecting the opening 13 of the cap body 5 and the top of the cap body 5 (generally in the vertical direction; the width direction), and is shaped like a plate in the thickness direction of the plate-like main body 53. It protrudes from the body portion 53 toward the cap body 5 side.

The projecting amount (protrusion height) of each of the plurality of projections 55 from the plate-shaped body portion 53 is the largest at the projection 55A located at the most tip side of the plate-shaped body portion 53. The projection 55C located on the most proximal side of is the smallest. Also, the amount of projection of each of the plurality of projections 55 decreases from the distal end of the plate-like body portion 53 toward the proximal end. That is, the protrusion height of the protrusion 55B is smaller than the protrusion height of the protrusion 55A and larger than the protrusion height of the protrusion 55C. The thickness direction of the plate-like protrusion 55 substantially coincides with the direction in which the plate-like body portion 53 protrudes from the hammock leg portion 9 .

In addition, in the spacer 17a, the projection height of the projection 55 may be increased from the distal end of the plate-shaped body portion 53 toward the proximal end. A two-dot chain line L12a shown in FIG.

Next, a spacer 17b according to a second modification will be described with reference to FIG. 12(b).

The first projecting portion 51 constituting the spacer 17b includes a plate-like body portion 53 and a plate-like protrusion 55 . The thickness direction of the plate-shaped body portion 53 is the thickness direction of the spherical shell-shaped cap body 5 .

A plurality of protrusions 55 are formed in the shape of a rectangular plate (more precisely, a trapezoid in which one oblique side is perpendicular to the lower or upper base). The plurality of protrusions 55 are provided at predetermined intervals in a direction (generally vertical direction; width direction) connecting the opening 13 of the cap 5 and the top of the cap 5 . The protrusion 55 extends in the direction of protrusion of the plate-shaped main body 53 from the hammock leg 9 (the circumferential direction of the outer circumference of the opening 13 of the cap body 5), and extends in the thickness direction of the plate-shaped main body 53. It protrudes from the main body portion 53 of the shape toward the cap body 5 side.

The plurality of protrusions 55 are formed in substantially the same shape. The protrusion amount (protrusion height) of the protrusion 55 from the plate-shaped body portion 53 is the largest at the most distal side of the plate-shaped body portion 53, and the smallest at the proximal end side of the plate-shaped body portion 53. The shape of the body portion 53 gradually decreases from the distal end toward the proximal end. The thickness direction of the plate-like projection 55 substantially coincides with the width direction of the plate-like body portion 53 .

In the spacer 17b, the amount of protrusion (protrusion height) of the projection 55 from the plate-shaped body portion 53 is the smallest at the most distal side of the plate-shaped body portion 53, and is the most proximal end of the plate-shaped body portion 53. It may be largest on the side. A two-dot chain line L12b shown in FIG. 12(b) is a straight line parallel to the plate-like body portion 53.

Next, a spacer 17c according to a third modification will be described with reference to FIG.

The first projecting portion 51 forming the spacer 17c is formed in a plate shape.

The thickness direction of the plate-like first projecting portion 51 that constitutes the spacer 17c is the thickness direction of the spherical shell-shaped cap body 5 . The plate-like first protrusion 51 has a thickness direction that penetrates the first protrusion 51 and is parallel to each other, and the direction in which the first protrusion 51 protrudes from the hammock leg 9 (cap body A pair of slits 69 extending in the circumferential direction of the outer circumference of the opening 13 of 5 are formed.

The portion 71 between the pair of slits 69 is bent in an arc shape (wavy shape), and the thickness of the plate-like first projecting portion 51 is increased from the portion 73 other than the portion between the pair of slits 69. It protrudes to the cap body 5 side in the direction.

Here, the hammock 1 for a protective cap in which the first projecting portion 51 constituting the spacer 17 projects from the engaged portion 27 located at the tip of the hammock leg portion 9 is shown in FIGS. 14 to 16. will be described with reference to.

The spacer 17 (first projection 51) of the protective cap hammock 1 shown in FIGS. It is formed similarly to the projecting portion 51 . The hammock 1 for protective caps shown in FIGS. 14 to 16 may be provided with slits shown in FIG. 7 and the like.

That is, in the hammock 1 for protective caps shown in FIGS. and a protrusion 55 .

Both the protrusion 55 and the high protrusion portion 67 may not be provided, or only one of them may be provided. If both are not provided, as shown in FIG. 17, the gap 99 formed between the first projecting portion 51 projecting from the locked portion 27 and the inner surface of the cap body 5 is increased (dimension 51H value). Alternatively, if both are not provided, as shown in FIG. 17, in order to reduce the amount of elastic deformation of the first projecting portion 51, for example, the value of the thickness dimension 51T of the first projecting portion 51 is increased. .

14 to 16, the slit 57 is not provided in the hammock 1 for protective caps shown in FIGS. is larger than the value of the protrusion height of the lower high protrusion portion 67L. Furthermore, when the spacer main body 53 is viewed in this thickness direction, the high protruding portion 67 is formed into a small "L" shape by being provided with the inner protruding portion 95. As shown in FIG.

Furthermore, as shown in FIG. 16, a connecting portion 97 that connects the pair of projections 55 is provided at the tip of the first projecting portion 51 on the front side. The connecting portion 97 is separated from the spacer body portion 53 . Note that the connecting portion 97 may not be provided.

Here, a hammock 1a for a protective cap according to a first modified example will be described with reference to FIGS. 18 to 23. FIG. A hammock 1a for a protective cap according to the first modified example is different from the protective cap hammock shown in FIG. It is different from hammock 1 of Further, the hammock 1a for a protective cap differs from the hammock 1 for a protective cap shown in FIG. Other points of the hammock 1a for protective caps are constructed substantially in the same manner as the hammock 1 for protective caps shown in FIG.

Further explaining, the hammock 1 a for a protective cap according to the first modification includes a shock absorbing portion 11 composed of a plurality of second projecting portions 15 projecting from the hammock legs 9 . In addition, in the hammock 1a for a protective cap, the plurality of second projecting portions 15 constituting the impact absorbing portion 11 are configured to project from at least one of the leg connecting portion 7 and the hammock leg portion 9. may

As shown in FIG. 18, the plurality of second projecting portions 15 are formed on the hammock leg portion 9 (the hammock that does not include the engaged portion 27) on the tip side of the hammock leg portion 9 (the side remote from the leg connecting portion 7). It protrudes from the leg 9). To explain further, the plurality of second protrusions 15 are arranged only in the portion from the central portion to the tip of the hammock leg portion 9 in the extending direction of the hammock leg portion 9 .

Also, a plurality of second protrusions 15 protrude from each of the plurality of hammock legs 9 (9A to 9H). That is, a plurality of second protrusions 15 (15Ab, 15Ac, 15Ad) protrude from the first hammock leg 9A. Similarly, a plurality of second protrusions 15 (15Bb, 15Bc) protrude from the second hammock leg 9B, and a plurality of second protrusions 15 (15Bb, 15Bc) also protrude from the eighth hammock leg 9H. Parts (15Hb, 15Hc, 15Hd) protrude.

Furthermore, the plurality of second protrusions 15 protruding from each of the plurality of hammock legs 9 are arranged at predetermined intervals in the extending direction of the hammock legs 9 . That is, the plurality of second protrusions 15 (15Ab, 15Ac, 15Ad) protruding from the first hammock leg 9A extend from the proximal side to the distal side in the extending direction of the first hammock leg 9A. They are lined up at predetermined intervals. Similarly, the plurality of second protrusions (15Bb, 15Bc) protruding from the second hammock leg 9B extend from the base end toward the tip in the extending direction of the second hammock leg 9B. They are lined up at predetermined intervals. . . . A plurality of second protrusions 15 (15Hb, 15Hc, 15Hd) protruding from the eighth hammock leg 9H extend from the base end to the tip in the extending direction of the eighth hammock leg H. They are lined up at predetermined intervals.

As shown in FIGS. 21 to 23 , the tip end surface 101 of the second projecting portion 15 is oblique with respect to the extension direction of the hammock leg portion 9 . That is, the tip surface 101 of the second projecting portion 15 is also oblique with respect to the projecting direction of the second projecting portion 15 .

The value of the projecting height from the hammock leg portion 9 at the portion of the distal end surface 101 of the second projecting portion 15 is small at the distal end side in the extending direction of the hammock leg portion 9 and at the base end in the extending direction of the hammock leg portion 9 larger on the sides. 21, height H1<height H2, height H3<height H4, and height H5<height H6. 22, height dimension H7<height dimension H8 and height dimension H9<height dimension H10.

The state in which the hammock 1a for the protective cap and the headband 31 are simply installed on the cap body 5 (the state in which no impact force is applied to the cap body 5 and the person is not wearing the protective cap 3) is defined as a normal state. . In this normal state, as shown in FIG. 23, the tip surface 101 of the second projecting portion 15 and the inner wall surface (inner surface) 103 of the cap body 5 are substantially parallel to each other. In other words, in the normal state, the tip surface 101 of the second projecting portion 15 has a shape along the inner wall surface 103 of the cap body 5 (a shape extending along).

A state in which a person simply wears the protective cap 3 in the normal state is defined as a normal wearing state. Assume that an impact force of a predetermined magnitude is applied to the cap body 5 in this normal wearing state. At this time, due to deformation (for example, elastic deformation) of the hammock legs 9 and the like, the tip surface 101 of the second projecting portion 15 contacts the inner wall surface 103 of the cap body 5 . Due to this contact, the second projecting portion 15 receives force from the cap body 5 . Note that the impact force is directed from the outside of the cap body 5 toward the inside of the cap body 5 . Furthermore, as the impact force, a force directed from the top of the cap body 5 downward (toward the opening 13 of the cap body 5) can be mentioned.

The first contact between the second projecting portion 15 and the cap body 5 when the impact force of the predetermined magnitude is applied to the cap body 5 is such that substantially the entire tip surface 101 of the second projecting portion 15 is covered with the cap. It is designed to come into contact with the inner wall surface 103 of the body 5 . It should be noted that the tip surface 101 of the second projecting portion 15 is substantially the entire surface of the tip surface 101 of the second projecting portion 15 when the impact force of the predetermined magnitude is applied to the cap body 5 . It can be said that the extension direction of the hammock legs 9 is oblique in order to abut on the inner wall surface 103 .

21 to 23, the tip surface 101 of the second projecting portion 15 is drawn linearly (planar). Here, in order to ensure that substantially the entire tip surface 101 of the second projecting portion 15 is brought into contact with the first contact in a more precise manner, the tip surface 101 of the second projecting portion 15 is placed on the cap body 5 . It may be formed in a curved shape (curved surface shape) along the inner wall surface 103 of the . For example, in the embodiment shown in FIG. 23 , the tip surface 101 of the second projecting portion 15 may have a curved shape such as an arc shape (on a spherical surface) convex toward the cap body 5 side. Then, in the above normal state, the parallelism between the tip surface 101 of the second projecting portion 15 and the inner wall surface 103 of the cap body 5 may be further increased. Even when the tip surface 101 of the second protrusion 15 is formed in the curved shape described above, the tip surface 101 of the second protrusion 15 must be oblique with respect to the extending direction of the hammock legs 9. to

Further, in the normal state (normal wearing state), as shown in FIG. It's becoming That is, the value of the distance between the tip surface 101 of each of the plurality of second protrusions 15 and the inner wall surface 103 of the cap body 5 is the tip side (locked portion 27 side) of the hammock leg 9 in the extending direction. ) and becomes smaller toward the proximal side (leg connecting portion side).

To explain further, when the impact force of a predetermined magnitude is applied to the cap body 5 in the normal wearing state, the second projecting portion 15Ad located at the most tip side in the extending direction of the hammock leg portion 9 starts to move. is adapted to abut against the cap body 5. Subsequently, the second protruding portion 15Ac positioned second from the leading end of the hammock leg portion 9 in the extending direction abuts on the cap body 5 . Similarly, the third and subsequent second projections 15Ab abut on the cap body 5. As shown in FIG. That is, the second projections 15 lined up from the distal end to the proximal end in the extending direction of the hammock legs 9 hit the cap body 5 in order from the distal end to the proximal end. It is designed to touch.

The distance between the tip surface 101 of the second projecting portion 15 and the inner wall surface 103 of the cap body 5 is, for example, perpendicular to the tip surface 101 of the second projecting portion 15 in the normal state. It is the distance between the tip surface 101 of the second projecting portion 15 and the inner wall surface 103 of the cap body 5 in the direction. That is, they are the distances D1, D2, and D3 shown in FIG. In order to absorb the impact, it is desirable to make the height of the projection 15 larger than the distances D1, D2, and D3.

Furthermore, in the normal state, the tip surface 101 of the second projecting portion 15 and the inner wall surface 103 of the cap body 5 are not completely parallel. Therefore, the value of the distance between the tip surface 101 of the second protrusion 15 and the inner wall surface 103 of the cap body 5 slightly differs depending on the part of the tip surface 101 of the second protrusion 15 . Therefore, for example, the minimum value of the distance between the tip surface 101 of the second projecting portion 15 and the inner wall surface 103 of the cap body 5 is defined as will be adopted as the distance between In addition, instead of adopting the minimum value, the maximum value or the average value ((maximum value + minimum value) ÷ 2) is used as the tip surface 101 of the second projecting portion 15 and the inner wall surface 103 of the cap body 5. may be used as the distance between

Although the above description is for the hammock leg 9A, the distance between the tip surface 101 of the second projecting portion 15 and the inner wall surface 103 of the cap body 5 is provided for the other hammock legs 9B to 9H. The same is true for the second projecting portion 15 that is provided. At least a part of the tip surface of the second protrusion 15 may be parallel to the inner wall surface 103 of the cap body 5 .

The rigidity (rigidity in the projection height direction) of the second projecting portion 15 is large on the distal end side in the extending direction of the hammock leg portion 9, and decreases toward the proximal end side in the extending direction of the hammock leg portion 9. ing. Here, the rigidity R of the second projecting portion 15 will be described. The proximal end of the second projecting portion 15 is fixed, and a force F directed toward the proximal end of the second projecting portion 15 in the projecting direction of the second projecting portion 15 is applied to the distal end. That is, a force F is applied to the second projecting portion 15 to compress the second projecting portion 15 in this projecting direction. Let X be the elastic deformation amount (shrinkage amount) of the second protrusion 15 in the protrusion direction of the second protrusion 15 at this time. Rigidity R of the second protrusion 15 can be expressed as "R=F/X". For example, if the material and cross-sectional shape (the cross-sectional shape of a plane perpendicular to the direction of protrusion) of each of the plurality of second protrusions 15 are equal to each other, the second protrusion 15 having a larger protrusion amount has a higher rigidity. becomes smaller.

As described above, the second projecting portion 15 is formed in a tubular shape, and the extending direction of the central axis of the tube of the second projecting portion 15 coincides with the thickness direction of the hammock leg portion 9 (approximately Match. Further, as shown in FIG. 18 and the like, inside the tube of at least some of the second protrusions 15 among the plurality of second protrusions 15, the second protrusions 15 from the hammock legs 9 are provided. A protrusion 105 is provided protruding in the same direction. For example, a projection 105 is provided inside the cylinder of the second projecting portion 15Ac shown in FIGS. The projection 105 also constitutes the impact absorbing portion 11 together with the second projecting portion 15 . The protrusion 105 is separated from the meat portion of the second protrusion 15A.

The height of the protrusion 105 protruding from the hammock leg 9 is smaller than the height of the second protrusion 15Ac surrounding the protrusion 105 from the hammock leg 9 . Furthermore, the value of the protrusion height from the hammock leg 9 of the protrusion 105 is, for example, smaller than the value of the protrusion height from the hammock leg 9 of all the second protrusions 15 . That is, the value of dimension H11 shown in FIG. 21 is smaller than the value of dimension H1.

The protrusion 105 is also formed, for example, in a tubular shape (more specifically, a cylindrical shape). are consistent with each other. The value of the outer diameter of the tube of the protrusion 105 is smaller than the value of the inner diameter of the tube of the second protrusion 15 .

As shown in FIGS. 19 and 20, when viewed from the extending direction of the central axis of the cylinder of the projection 105 and the extending direction of the central axis of the cylinder of the second projecting portion 15, the central axis of the cylinder of the projection 105 can be seen. The position and the position of the central axis of the cylinder of the second projecting portion 15Ac are different from each other. For example, the center axis of the tube of the protrusion 105 in the extending direction of the hammock leg 9 is positioned slightly toward the tip side than the center axis of the tube of the second protrusion 15Ac. It should be noted that the position of the central axis of the cylinder of the projection 105 and the second projection 15Ac when viewed from the extension direction of the cylinder center axis of the projection 105 and the extension direction of the cylinder center axis of the second projection 15Ac. The positions of the central axes of the cylinders may coincide with each other.

Here, the hammock 1a for protective caps according to the first modification will be described in more detail. Spacers 17 shown in FIGS. 18, 19, 20, etc. are configured and provided in the same manner as spacers 17 shown in FIGS. 15 and 16, for example.

The impact absorbing portion 11 provided on the hammock leg portion 9A is configured including, for example, three second projecting portions 15Ab, 15Ac, 15Ad and a projection 105. As shown in FIG. The second protruding portion 15Ab is formed in a rectangular tubular shape (square tubular shape) with four arcuate corners. The second projecting portion 15Ac is also formed in a rectangular cylindrical shape like the second projecting portion 15Ab. The second projecting portion 15Ad is formed in an oval shape when viewed in this projecting direction, and the longitudinal direction of the oval is orthogonal to the extending direction of the hammock leg portion 9A (the hammock leg portion 9A). width).

The thickness of the tube of the second projecting portion 15Ad is greater than the thickness of the tube of the second projecting portions 15Ab and 15Ac. When viewed in the projecting direction of the second projecting portions 15Ab, 15Ac, and 15Ad, the value of the outer diameter dimension of the second projecting portion 15Ad in the width direction of the hammock leg portion 9A is the outer diameter of the second projecting portions 15Ab, 15Ac. Almost equal to the dimension value. In addition, when viewed in the projecting direction of the second projecting portions 15Ab, 15Ac, and 15Ad, the value of the outer diameter dimension of the second projecting portion 15Ad in the extending direction of the hammock leg portion 9A is equal to that of the second projecting portions 15Ab, 15Ac. It is smaller than the value of the outer diameter dimension of

By the way, the projection 105 may be formed in a columnar shape other than the cylindrical shape, such as a cylinder or a square column. Also, a plurality of protrusions 105 may be provided in one second protrusion 15Ac. Further, instead of or in addition to providing the projection 105 in the second projecting portion 15Ac, the projection 105 may be provided in another second projecting portion 15 other than the second projecting portion 15Ac.

Ribs 107 for reinforcing the second projecting portion 15Ab and the second projecting portion 15Ac are provided inside the second projecting portion 15Ab and the second projecting portion 15Ac. The rib 107 is attached to the second protrusion 15Ac and the hammock leg 9A and is separated from the protrusion 105. As shown in FIG. Incidentally, the rib 107 may be attached to the second projecting portion 15Ac, the hammock leg portion 9A and the projection 105. FIG.

A rib 109 is also provided between the second projecting portion 15Ac and the second projecting portion 15Ad to reinforce the second projecting portion 15Ac and the second projecting portion 15Ad. The rib 109 is attached to the second projecting portion 15Ac, the second projecting portion 15Ad and the hammock leg portion 9A. The protrusion height of the rib 109 from the hammock leg portion 9A is also lower than the protrusion height of the second protrusion portion 15 . A rib similar to the rib 109 for reinforcing the second projecting portion 15Ab and the second projecting portion 15Ac may be provided between the second projecting portion 15Ab and the second projecting portion 15Ac. . Ribs 107 and 109 also form impact absorbing portion 11 .

The impact absorbing portion 11 provided on the hammock leg portion 9B is configured including, for example, two second projecting portions 15Bb and 15Bc. The second projecting portion 15Bb is formed in a rectangular tubular shape (square tubular shape) with four arcuate corners, similarly to the above-described second projecting portion 15Ab. The second projecting portion 15Bc is also formed in a rectangular tubular shape like the second projecting portion 15Bb.

A rib 107 similar to that of the second projecting portion 15Ab and the second projecting portion 15Ac is provided inside the second projecting portion 15Bb and the second projecting portion 15Bc. Between the second projection 15Bb and the second projection 15B, a rib 109 and a rib similar to the projection 105 are provided for reinforcing the second projection 15Bb and the second projection 15Bc. may

Hammock leg 9D, hammock leg 9E, and hammock leg 9H are provided with shock absorbers 11 similar to hammock leg 9A. Hammock legs 9C, hammock legs 9F, and hammock legs 9G are provided with shock absorbers 11 similar to the hammock legs 9B. By the way, the hammock legs 9B, 9C, 9F, and 9G are provided with shock absorbing portions 11 similar to the hammock legs 9A, and the hammock legs 9A, 9D, 9E, and 9H are provided with the shock absorbing portions of the hammock legs 9B. 11 may be provided.

In the hammock 1a for a protective cap, the impact absorbing portion 11 is composed of a plurality of second protrusions 15 protruding from the hammock legs 9, and the tip surfaces 101 of the second protrusions 15 extend from the hammock legs. It is oblique to the extending direction of the portion 9 . Furthermore, in the hammock 1a for a protective cap, the value of the protrusion height from the hammock leg 9 at the second protrusion 15 is small on the tip side in the extension direction of the hammock leg 9. It is larger on the proximal side of the direction.

In the normal state and the normal wearing state, the tip surface 101 of the second projecting portion 15 has a shape along the inner wall surface 103 of the cap body 5 . Assume that the impact force of a predetermined magnitude is applied to the cap body 5 in the normal wearing state. At this time, the first contact between the second projecting portion 15 and the cap body 5 is such that substantially the entire tip surface 101 of the second projecting portion 15 contacts the inner wall surface 103 of the cap body 5 . It has become. As a result, the second projecting portion 15 has an appropriate impact absorbing power.

Further, in the hammock 1a for a protective cap, the values of the distances D1, D2, and D3 between the tip end surface 101 of each of the plurality of second projections 15 and the inner wall surface 103 of the cap body 5 correspond to the values of the hammock legs 9. It is large on the distal end side in the extending direction and becomes smaller toward the proximal end side. Then, when a predetermined impact force is applied, the second protrusions 15 aligned from the tip end side to the base end side in the extension direction of the hammock legs 9 move from the tip end side to the base end side. It contacts the cap body 5 sequentially toward the object. As a result, when the cap body 5 receives an impact force from, for example, the front and back of the head, it is possible to absorb the impact force while preventing the hammock legs 9 from overstretching.

In addition, in the hammock 1a for a protective cap, the rigidity of the second projecting portion 15 is greater on the distal end side in the extending direction of the hammock leg portion 9, and increases toward the proximal end side in the extending direction of the hammock leg portion 9. It's getting smaller. This also prevents the hammock legs 9 (especially the portions from the base end to the middle in the extending direction) from being excessively stretched when the cap body 5 receives an impact force from, for example, the front and back of the head. It can absorb impact force.

Moreover, in the hammock 1a for protective caps, the same as the second protrusion 15 from the hammock legs 9 is provided inside the tube of at least some of the second protrusions 15 among the plurality of second protrusions 15. A projection 105 projecting in the direction is provided. Thereby, the rigidity of the second projecting portion 15 can be increased stepwise (for example, in two steps) while being appropriately adjusted.

By the way, in the above description, the tip end surfaces of all the second protrusions 15 are inclined, but the tip end surfaces of all the second protrusions 15 do not necessarily have to be inclined. A mode in which the tip surface of at least a part of the second projecting portion 15 is inclined may be used. For example, the tip surface 101 of the second projecting portion 15Ad may be orthogonal to the projecting direction of the second projecting portion 15Ad.

Next, a hammock 1b for a protective cap according to a second modified example will be described with reference to FIGS. 24 to 26. FIG. A hammock 1b for a protective cap according to the second modification has a single ring-shaped leg connecting portion 7 (for example, a form in which the inner ring-shaped portion 21 shown in FIG. 5 is removed). This is different from the hammock 1a for protective caps according to the first modified example.

Further, the hammock 1b for a protective cap differs from the hammock 1a for a protective cap according to the first modification in that the number of hammock legs 9 is changed.

Each of the four hammock legs 9 (9A to 9D) of the protective cap hammock 1b is provided with the same shock absorber 11 as the protective cap hammock 1a. 25 is a head-head-hand installation portion for installing the headband 31 shown in FIG. Reference numeral 111 in FIG. 25 denotes a locking portion to which the locked portion 113 of the headband 31 shown in FIG. 24 is locked.

In the above description, eight or four hammock legs 9 extend, but the number of hammock legs 9 extending from the leg connecting portion 7 is five or six. , 10, or any other number.

Although the present embodiment has been described above, the present embodiment is not limited to these, and various modifications are possible within the scope of the gist of the present embodiment.

1 hammock for protective cap 5 cap body 7 leg connecting part 9 hammock legs 9A, 9H front pair of hammock legs 9D, 9E rear pair of hammock legs 11 shock absorbing part 13 opening 15 second Projection 17 Spacer 51 First projection 53 Plate-like main body 55 Projection 57 Slit 101 Tip surface 105 Projection H1 to H10 Projection height

Claims (10)

a leg joint;
a plurality of hammock legs extending from the leg connections in different directions;
a spacer composed of a first projecting portion projecting in the circumferential direction of the opening of the cap from the distal end portions of at least a pair of adjacent hammock legs among the plurality of hammock legs;
hammock for hard hats with 2. The hammock for a protective cap according to claim 1, further comprising a plurality of second protrusions protruding from at least one of said leg connecting part and said hammock legs. 3. The first projecting portion constituting the spacer is provided between the pair of hammock legs on the front side and between the pair of hammock legs on the rear side. hammock for protective headgear. The first projecting portion constituting the spacer includes a plate-like main body and a projection protruding from the plate-like main body, and the thickness of the plate-like main body is The direction is the thickness direction of the meat of the spherical shell-shaped cap, and the projection protrudes toward the cap in the thickness direction of the plate-like main body. Hammock for the protective helmet described in . In order not to interfere with the feeling of wearing a hat in a normal wearing state due to the first projecting portion that constitutes the spacer, the portion of the plate-like main body where the protrusion is formed and the plate-like 5. A hammock for a protective cap according to claim 4, wherein a slit penetrating the plate-like main body in the thickness direction is provided between the portion of the main body where the projection is not formed. . The projections extend in the projecting direction of the first projecting portion constituting the spacer at both ends in the width direction of the plate-like main body,
The plate-like main body is provided with a slit that penetrates the plate-like main body in the thickness direction,
5. The hammock for a protective cap according to claim 4, wherein said slit extends along said protrusion adjacent to said protrusion when viewed in the thickness direction of said plate-like main body. Having a shock absorbing part composed of a plurality of second protrusions protruding from the hammock legs,
2. The hammock for a protective cap according to claim 1, wherein the tip end surface of said second projecting portion is slanted with respect to the extension direction of said hammock leg portion. A value of the height of the second projecting portion protruding from the hammock leg portion is small on the distal end side in the extension direction of the hammock leg portion and is large on the base end side in the extension direction of the hammock leg portion. Item 8. A hammock for protective caps according to Item 7. The plurality of second protrusions protrude from each of the plurality of hammock legs, and the plurality of second protrusions protruding from the hammock legs are arranged in the extending direction of the hammock legs. They are arranged at regular intervals,
8. The rigidity of the second projecting portion according to claim 7, wherein the rigidity of the second projecting portion is large on the distal end side in the extension direction of the hammock leg portion and decreases toward the base end side in the extension direction of the hammock leg portion. Hammock for protective helmet. The second projecting portion is formed in a cylindrical shape,
A protrusion protruding from the hammock leg in the same direction as the second protrusion is provided inside the tube of at least some of the plurality of second protrusions. The hammock for protective caps according to any one of claims 7 to 9.

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