JPS60104508A - Protective helmet having jaw belt control apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a protective helmet having a chin belt adjustment device for securing a protective helmet by means of an integral flexible chin belt that is tightly tightened around the user's chin. of the type in which the chin belt can be secured to a manually operable locking device.

Conventional Technology This type of protective helmet, also called a hard hat in relation to its intended use, is designed to securely fix the protective helmet on the head of the person it is intended to protect, and to prevent it from sliding forward. In order to do this, a chin belt is effective for the second part. This chin belt is not only capable of withstanding a given load, but is also adjustable in its effective length to ensure that it remains functionally and protectively on the user's head. .

However, it is both an advantage and in many cases essential to be able to easily remove or loosen the chin belt in order to remove the helmet without significant hindrance, especially after an accident.

In many protective helmets of this type, the chin belt is constructed in two parts and is provided with a catch. Handling such a two-part chin belt is laborious and extremely difficult, for example when wearing gloves. In another known design, a tightening element is provided on one side of the helmet, thereby making it possible to continuously adjust the chin belt. The free portion of the chin belt must form a loop through the tightening member in this configuration. Therefore.

In order to secure the chin belt, you must first operate the tightening mechanism.

In order to avoid the aforementioned drawbacks, it has been proposed to construct a chin belt adjustable in length in one piece. This one-piece chin belt can be automatically secured to a manually operable locking device under the action of a rewinding force.

In this case, the flexible strip forming the chin strap is brought into close frictional contact with the helmet-side friction surface or clamping surface as soon as the operation is stopped.

Problem to be Solved by the Invention The problem to be solved by the invention is to improve the protective helmet of the type mentioned at the outset by making it easier and simpler to handle and by simplifying the structure provided for this purpose. The purpose is to make it possible to keep the structural dimensions small.

Means for Solving the Problems A configuration of the invention for solving the aforementioned problems provides that the chin belt has a shape that allows it to exert shearing and pressing forces at least in the range of adjustment in which it cooperates with the locking device. It has stability.

EXAMPLE The plastic protective helmet shown in perspective view in FIG. 1 is in the form of a helmet body 1 having a viewing aperture 1a, a head portion 1b and a U-shaped jaw portion IC. As shown, on the inner surface of one side of the protective helmet hemisphere l is fixed a chin belt adjustment device, generally indicated by the reference numeral 2, for example by means of an IJ dt or similar. On the side opposite 1, a catch 4 with one through hole 3 for a flexible chin strap 5, which is configured in the form of a strip in its largest part, is likewise fixed, for example by a rivet 6. The chin strap 5, which is constructed as a strip, is passed with one free end through the through hole 3 of the catch 4 to form a loop and sewn together at point 7. As already mentioned, the chin belt adjustment device 2 and the catch 4 are arranged on the inside of the protective helmet, in particular on the inside of a cushioning layer (not shown) which is also fastened to the protective helmet. The other end of the chin belt 5 is also connected by means of a stitching loop 8 to an easily bendable flat belt-like adjustment part 9 which also has a through hole 10 for this purpose. There is. The adjusting part 9 is made of a dimensionally stable and resilient material, for example plastic, and has a row of locking teeth 11 arranged on its inner surface, for example rolled or injection molded. The row of locking teeth 11 is arranged only in the central region of the adjustment part 9, so that the lateral regions 12 are not toothed. The adjustment portion 9 is longer than the adjustment range of the chin belt 5. At the start section of this adjustment range and at the connection point between the flexible strip 5a and the adjustment part 9, a sleeve-like handle 13 is provided.
is provided. This grip 13 has a grip recess 13a that covers the joint portion. The grip 13 is immovably arranged on the adjustment part 9 by forcing the connection point.

In order to adjust the chin belt 5, by grasping the adjustment part 9 at the grip 13, the chin belt 5 is moved towards the chin belt adjustment device 2 and tightened by shearing force;
Alternatively, pull the chin belt 5 from the chin belt adjustment device 2 to the bottle-shaped stone ξ14 placed in the adjustment portion to prevent the chin belt 5 from being completely pulled out by hitting the chin belt adjustment device 201 portion. It can be pulled out and loosened. A chin belt adjustment device 2 is shown in FIGS. 1 to 4, respectively. The chin belt adjustment device 2 consists of a U-shaped stable casing 15, which gauging 15 is rigidly connected to an opening 16 in the inner surface of the helmet body 1 by means of rivets. The slit-shaped guide portion 19 disposed on the side wall 17 of the casing 15 extends at an angle relative to the bottom surface of the casing 15 between the two side walls 17 . These guide portions 19 are used as movement tracks for locking slides 20 in the form of blocks made of metal, for example.

The locking slider 20 has a rectangular opening 21 for a piece-shaped bearing member 22, which projects on both sides of the opening 21 and guides the guide part 19 movably in the longitudinal direction of the travel track. has been done. The locking slide 20 has on its inner surface a corresponding locking tooth 23 consisting of a plurality of teeth. This corresponding locking tooth 23 cooperates with the locking tooth 11 of the adjusting part 9 to effect the locking. The locking slider 20 has a tongue-shaped operating piece 24 extending in a right angle direction on the side thereof.

Via this operating piece 24, the locking slider 20 can be moved along the guide portion 19 against the force of the V-shaped spring 25. The spring 25 is supported in a corresponding aperture 26 in the side wall 17 and with its free spring leg locks the locking slide 2.
Pressing the upper side of 0. This spring 25 forces the locking slider 20 into the locking position shown in FIGS. 3 and 4. In this pressed state, the locking teeth 11 of the chin belt 5 engage with the corresponding locking teeth 23, thereby fixing the chin belt 5 immovably in the vertical direction. By moving the locking slider 20 against the force of the spring 25, the corresponding locking tooth 23 is released from engagement with the locking tooth 11, so that the bolt 5 or the adjusting part 9 of the jaw belt 5 can be attached to the jaw. Can be moved freely.

Furthermore, a support opening 27 for a support shaft 28 is provided in the side wall 17 of the casing 15, and a guide member having two roller attachment portions 29 is rotatably supported on the support shaft 2BK. This guide element serves as a guide path limit for the adjusting part 9, which is supported with both toothless side regions on the roller support 29. In this way.

After the locking slider 20 has been moved to the unlocking position, the locking tooth 11 will remain the corresponding locking tooth 2 even if the locking slider 20 is moved diagonally to the extreme.
It does not come into contact with 3 or get caught. The guide member is designated by 30.

In particular, as shown in FIGS. 5 and 6, an operation tank 31 is fixed to the helmet body 1 in the immediate vicinity of the chinstrap adjustment device 2. Since the operation tank 31 is configured in a bowl shape and has an edge flange 32, it is inserted into the corresponding opening of the helmet body 1 from the outside and is connected to the outer limit portion of the helmet body 1 with the edge flange 32. It is installed. The spring member 33 having a substantially semi-circular arc shape surrounds the outer periphery of the operation tank 31 and is attached to the spring hook 3 in the locking slit 34 of the operation tank 31.
5, the operating tank 31 is locked with the spring member 33.
It is fixed to the helmet body 1 by. Operation tank 3
1 has a notch 36 on the upper side, through which the operating piece 24 of the locking slider 20 protrudes into the inner chamber of the operating tank 31 or into the operating chamber 37.

An arrow is attached to the bottom of the operation tank 31 for operating the operation piece 24. By moving the operating piece 24 in the direction of the arrow within the operating tank 31, the locking slider 20 is moved obliquely outward against the force of the spring 25. This releases the aforementioned lock.

In FIGS. 7 to 9 several embodiments of the adjustment part 9 of the chin belt 5 are shown. In the embodiment of FIG. 7, the adjusting part 91 consists of a flat strip of extruded polyester, on the upper side of which the locking teeth 11 are rolled or integrally formed. In the embodiment shown in FIG. 8, the free end of the flexible strip 5a is wrapped with a plastics material 92 which is dimensionally stable, has high strength and high elasticity. This plastic material 92 forms the adjustment part and furthermore has serrated locking teeth 11 . In the embodiment shown in FIG. 9, the support is a metal plate 93 in the form of a spring steel strip, which in this embodiment has integrally rounded locking teeth 11a. It is encased by a molded plastic material 94. The sewing loop 8 of the chin belt 5 is fixed in the through hole of the spring steel strip. In this embodiment, a slightly less strong plastic can be used for the adjustment part.

In the embodiment shown in FIGS. 1O and 11, the connection point between the flexible strip 5a and the adjustment part 9, made of, for example, dimensionally stable plastic and provided with locking teeth 11, has a multilayer design. As can be clearly seen in particular from the exploded view in FIG. 11, it consists of a folded strip 5a, an adjustment section 9, and two metal plates 39 stacked one above the other on both ends. . The aforementioned parts of the strip material 5a, the adjustment part 9 and the two plates 39 are connected to the rivets 6.
are relatively immovably connected by. This IJS
Each part has rivet holes 40 for connection.

They are arranged in two rows when viewed in the longitudinal direction of the chin belt.

The 4-hole holes 40 are arranged in these rivet rows so as to be offset from each other by the amount of offset a, thus ensuring that the cross section at the joining point is kept as perfect as possible and that an even force is applied to the joining fibers of the strip. distribution can be guaranteed. The parts are fixedly connected to each other by 6 km.

In the embodiment shown in FIG. 12, a U-shaped catch 41, preferably made of metal, is provided.

The U-shaped catch 41 has two plate parts 42 extending parallel to each other as free legs and a full stop part 43 pressed together. A flat belt-like adjustment part 9 is arranged between the two plate parts 42 and is further immovably connected to the plate part 42 by means of rivets 6. In this case too, the rivet holes are offset with respect to each other so that has been done. A through hole 44 is provided in all of the same fastening portions 43, and the flexible strip 5a is passed through the through hole 44 to form a loop and sewn together.

Advantages of the Invention By integrally constructing the chin belt, the process of joining two chin belt parts is omitted.

According to the invention, a chin belt which is itself elastic or a flexiple chin belt has a high shape stability, at least in its adjustment range, such that both shearing forces and pressing forces can be applied to the chin belt to tighten or loosen the chin belt. This feature greatly facilitates operation. In this case, the length of the chinstrap can be adjusted very simply by means of a retraction device which automatically pulls the chinstrap into its respective relatively short position, i.e. the user more or less inserts the adjustment part into the locking device. A special crimping device for fixing can be omitted. Operation is facilitated by the provision of a dimensionally stable grip in the starting section of the adjustment part. Particularly if the chin belt consists of a flexible strip and a dimensionally stable adjustment part, this handle can serve as a connection point for the strap and the adjustment part or as a connection point, e.g. as a riveting point. Serves as a cover for.

Effects of the Embodiments With the advantageous embodiments described in the claims 9 et seq., a chin belt adjusted in length can be fixed by interlocking the locking teeth. In this case, the locking teeth on the side of the protective helmet are arranged on a locking slider movable in a V-shape, the locking slider being pushed into the locking position by a spring force, and the locking slider being pushed into a locking position by a spring force. The ability to adjust the chin belt when it is moved into the released position against the chin advantageously provides a significantly simpler construction.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a protective helmet according to the present invention in which a chin belt adjustment device is fixed to the helmet body, and FIG.
FIG. 3 is an exploded view of the chin belt adjustment device shown in FIG. 3; FIG. 3 is a vertical sectional view of the chin belt adjustment device shown in FIGS. The plan views of the adjusting device, FIGS. 5 and 6, show a portion of the helmet body to which the operating chamber is fixed for operating the chin belt adjusting device shown in FIGS. 1 to 4. Figures shown, Figures 7 and 8
9, 10, 11 and 12 show different embodiments of the connection points between the chin belt and the adjustable part of the chin belt in its adjustment range. 1...Helmet body, la...Visual aperture, ib...
...Head part, IC...U-shaped chin part, 2...chin belt adjustment device, 3...through hole, 4...stopper,! 5
- Chin belt, 5a... Band material, 6... Rivet,
7... Location, 8... Suture loop, 9... Adjustment part, IO... Through hole, 11. lla...locking tooth, 1
2... Lateral range. 13... Grip, 13a... Grip recess, 14... Stopper, 15... Casing, 16... Opening + 1
7... Side wall, 19... Guide portion, 20... Locking slider, 21... Opening, 22... Supporting member, 23...
- Corresponding locking tooth, 24... Operation piece, 25... Spring, 2
6... Opening, 27... Supporting part 0.28... Supporting shaft, 29... Roller addition part, 30... Guide member, 31
... Operation tank, 32 ... Edge flange, 33 ... Spring member, 34 ... Locking slit, 35 ... Spring hook, 36 ... Notch, 37 ... Operation chamber, 39 ...Plate, 40...Rivet hole. 41...U-shaped stopper, 42...Plate part, 4
3...All parts of the stop, 44...Through hole, 91...Adjustment part. 92...Plastic material, 93...Metal plate. 94... Silastic material, a... Amount of deviation. FIG, 2 5 FIG, 3 FIG, 4 m 1■ FIG, 5

Claims (1)

[Scope of Claims] 1. A protective helmet having a chin four-rut adjustment device that fixes the protective helmet by an integrated flexible chin belt that is tightly tightened around the user's chin, the chin belt being manually operated. In those types that are adapted to be secured to a possible locking device, the chin rest (5
) cooperates with the locking device at least in the adjustment range,
It is characterized by having shape stability that allows it to apply shear force and pressing force. Protective helmet with chin belt adjustment device. 2. The entire chin belt consists of a spring-elastic material. A protective helmet according to claim 1. 3. The chin belt consists of a flexible strip (5a), the adjustment range of which is reinforced by a spring-elastic material. A protective helmet according to claim 1. 4. The adjustment range of the strip (5a) is wrapped in injection molded plastic. A protective helmet according to claim 3. 5. A metal plate (93) is inserted into the adjustment range. A protective helmet according to claim 3 or 4. 6. Connected to a flexible strip (5a) or a spring-elastic adjustment part (9). Protection according to claim 3. 7. A grip (13) is provided at the starting end section of the adjustment range. Any one of claims 1 to 6
Protective helmets as described in Section 1. 8. A stopper ξ (14) is arranged in the end section of the adjustment range, which stop (14) cooperates with the locking device to prevent the jaw tilt (5) from being pulled out of the locking device. There is. A protective helmet according to any one of claims 1 to 7. 9. The chin belt (5) has locking teeth (11) in its adjustment range, and the corresponding locking teeth (23) are adjustable to the outside of the locking position by means of the operating piece (24) of the locking device. The locking tooth (11) can engage the chin belt (5) at different positions. Claim 1
A protective helmet as described in any one of paragraphs 8 through 8. [fO, a corresponding locking tooth (23) is arranged on a locking slide (20) with an operating piece (24), which locking slider (20) is at an angle with respect to the guide path of the adjusting part (9). It is configured to be able to move within the casing (15) along a guide portion (19) that extends obliquely and against the force of a spring (25). A protective helmet according to claim 9. 11 The operating piece (24) of the locking slider (20) engages with an externally accessible operating tank (31) fixed to the helmet main body (1) so that it can be operated there. A protective helmet according to claim 10. 12 The casing (15) of the locking device is the operation tank (31)
It is fixed to the helmet body ill next to the
A protective helmet according to claim 1θ. 13. Any one of claims 1 to 12, wherein the heald (5) is made of a flat belt, and the locking teeth (11) are formed on the upper surface of the flat belt by rolling. The protection described in one section. 14 Chin belt (5) and adjustment part of the chin belt (5) (
The connection point with 9) is constructed in multiple layers and consists of at least a flat belt-like adjustment part (9) and a shape-stable plate (39; 42) that are connected to each other. Any one of claims 1 to 13
Protective helmets as described in Section 1. 15 The plate is configured in the form of an approximately U-shaped catch (41), of which the adjustment part (9) is fixed between mutually parallel plate parts (42). A protective helmet according to claim 14. 16 Band tt (5a) with flexible clasp (41)
It has a through hole (44) for fixing. A protective helmet according to claim 15. 17 The joint part is the adjustment part (9) and the band material (5a). (39) consisting of plays placed on both sides. A protective helmet according to claim 14. 18. The layers at the connection point are connected to each other by rivets (6), which are arranged in at least two rows in the longitudinal direction of the chin belt and offset from each other. A protective helmet according to any one of claims 1 to 17. 19. On the insertion side of the locking device, in front of the corresponding locking tooth (23), a guide element (3o) for the chin belt is provided. A protective helmet according to any one of claims 1 to 18. + The locking teeth (11) are located only in the central area of the jaw belt.
In turn, the chin strap is supported in the non-dented side areas (12) on the guide element (3o). A protective helmet according to claim 19. ′