JP2722335B2 - Energy absorption unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an energy absorbing unit, and more particularly, to a safety belt used to prevent a crash in working at height.
The present invention also relates to a special belt safety unit for absorbing impact energy used for various safety belts for automobiles, parachutes and other vehicles.

[0002]

2. Description of the Related Art Conventionally, as this kind of impact energy absorbing unit 1, as shown in FIG. 5, two belts 2 and 3 having a width of about 50 mm or less are overlapped, and the overlapped portion is formed by a large number of pieces. A structure in which sewing is performed using a sewing thread 4 to form an integral portion 5 and a separating portion 6 is known.

An impact energy absorbing unit 1 having such a structure
In this embodiment, the end of one belt portion 3 of the separating portion 6 is attached to a safety belt 11 on the side of the human body, and the other end of the belt portion 7 of the separating portion 6 is generally called a D-ring. Connected to the ropes and hooks 9 via the connecting ring 8, and even if the vehicle accidentally crashes at a high place, the impact force acts strongly between the two belts of the separating portion 6, and the integral portion 5 is sewn. In this case, the sewing thread is torn and broken, and the breaking force of the sewing thread absorbs impact energy. In such a conventional method, in order to form the integrated portion 5, the quality of the energy absorbing unit greatly fluctuates depending on the skill of a sewing manufacturer, a sewing pattern, and the like, in addition to the sewing machine, the sewing thread, and the belt. However, this may cause a change in the impact energy absorption effect, which is a problem and cannot be said to be a preferable method.

Further, the above-mentioned conventional construction requires a sewing step, which is inefficient and leads to an increase in production cost. On the other hand, as a method for solving the problem concerning the conventional energy absorbing unit, for example, an improved method as disclosed in JP-B-63-15863 has been proposed.

That is, as shown in FIG.
Japanese Patent No. 15863 discloses that two belts are not joined by sewing with a sewing thread as in the above-mentioned conventional example, but the two belts 12 and 13 are joined by a binding thread 14 during weaving.
To form an integral part 5, and then the two belts 12
And 13 form a separating portion 6 formed independently of each other, and the binding yarn 14 is divided into two belts 1
It is divided into 2 and 13 and arranged.
As shown in FIG. 5, the end of one belt 13 of the separation section 6 is connected to a rope via a connection ring 8 called a D ring.
As shown in FIG. 5, the end of the other belt portion 12 is connected to the safety belt 11 on the human body side, and the entire impact energy absorbing unit is simultaneously woven in the weaving process. It is configured to do so.

In such a method, the two belts described above are not joined by sewing threads, but attain the purpose in the weaving process. Compared with the technical progress.

[0007] In the specific example shown in FIG.
When the impact energy absorbing unit is woven,
The integral part 5 and the separation part 6 are formed alternately and continuously,
When cutting the continuous belt state appropriately and commercializing it,
As shown in FIG. 6 (B) -1, at one end thereof,
An integral part 5 may be formed, and a separating part 6 may be formed at the other end.
As shown in (1), the separating portion 6 may be formed at both ends, and the integrated portion 5 may be formed at the intermediate portion.

Further, in the above conventional example, FIG.
As shown in (B) -3, an integrated portion 5 may be formed at both ends and a separating portion 6 may be formed at an intermediate portion. However, Tokuboku Sho 63
The energy absorbing unit disclosed in Japanese Patent No. 15863 also has the following technical disadvantages. That is, in a safety belt in which the impact energy absorbing unit is used, as a typical example, one belt of the separation unit is attached to a safety belt on the human body side, and the other belt is a D belt.
Usually, it is attached to a small metal ring such as a ring, and a rope, a hook or the like is attached to the tip of the ring.

At this time, in order to attach a flat belt (usually the width is 50 mm) to a small ring such as a D ring, it is a general method to bend and sew through a ring belt and fix the belt to the ring. If this mounting work is difficult, the workability such as bending and sewing a part of the belt in the width direction is often bad, and the work of mounting the belt to a complicated ring is required, and if it only hinders productivity, In addition, it is a cause of quality variation as a safety belt, and improvement of such problems has been strongly demanded.

Another major drawback of the prior art is that the impact energy absorbing unit has a large shape as an impact energy absorbing unit because each of the one body portions for absorbing impact energy is constituted by two flat belts. Not get, so
Since workability is often hindered when working at heights, the energy absorbing unit needs to be as light and small as possible, and there has been a strong demand for this. In addition, such an energy absorbing unit is required to have an endless performance improvement of impact energy absorption, which is the most important point, and even if a worker at a high place unfortunately encounters a crash, There is a growing demand for a high-performance impact energy absorbing unit that can be restarted in a short time without causing any damage to the human body.

An energy absorbing unit based on the prior art cannot completely solve the above-mentioned drawbacks, and has an energy absorbing unit having a performance that completely satisfies the above-mentioned needs. Could not be supplied.

[0012]

SUMMARY OF THE INVENTION An object of the present invention is to improve the above-mentioned drawbacks of the prior art, to provide high safety and high-performance impact energy absorption capacity, and to realize a reduction in size and weight. It is another object of the present invention to provide an energy absorbing unit capable of preventing the damage to the human body by equalizing the impact applied to the human body when absorbing the impact energy.

[0013]

The present invention employs the following technical configuration to achieve the above object. That is, as a basic configuration of the energy absorption unit according to the present invention, a first width having a first width is used.
And the first band-shaped part are configured separately from each other,
An energy absorbing unit including a second band having a second width larger than a first width of the first band; and the energy absorbing unit includes the first band. A first portion in which the body portion and the second band portion are separated from each other, and a first portion in a state where the second band portion substantially surrounds the first band portion. The second part in the state of being integrally fixed is an energy absorbing unit disposed adjacent to the second part. As another mode of the above energy absorbing unit, the second band-shaped part has The second width is an energy absorbing unit set to be approximately twice as large as the first width of the first band-shaped portion.

[0014]

Since the energy absorbing unit according to the present invention has the above-mentioned technical configuration, it is particularly necessary to separate the belt, that is, one of the belt portions in the first portion pointed out in the present invention. The first band portion is formed as a thin band member having a width approximately half of that of the second band portion so as to be easily inserted into an annular metal member (D ring) connected to a rope, a hook, or the like. Therefore, not only the size and weight can be reduced, but also the work of inserting into the annular metal member (D ring) is simple and easy, so that the work efficiency is greatly improved.

On the other hand, the other belt portion, that is, the second belt-shaped portion, connected to the safety belt for the human body, is expanded and used in a plane, so that it is substantially the same as the conventional impact energy absorbing belt. Is formed, so that in terms of performance, the same functions and effects as those of the conventional impact energy absorbing belt can be exhibited. Further, one of the salient features of the energy absorbing unit according to the present invention is that
When a breaking force acts between the second belt-shaped body portion and the second belt-shaped body portion, the binding yarns between the two belts in the conventional impact energy absorbing belt are simultaneously and planarly arranged one by one. In this case, the first and second belt-like portions act in a diagonal direction with respect to each other. As a result, the binding yarn constituting the integrated portion as the second portion is three-dimensional (3
Since the fracture is performed (dimensionally) and randomly, the fracture energy can be uniformly absorbed, so that the impact energy can be stably absorbed by the fracture without causing intermittent impact change to be given to the human body.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific example of the energy absorbing unit according to the present invention will be described below in detail with reference to the drawings. FIG.
FIG. 3 is a perspective view showing a configuration of a specific example of the energy absorbing unit according to the present invention. In the drawing, a first band-shaped body 22 having a first width d and the first band-shaped body 22 are shown. Is an energy absorbing unit 30 which is formed separately and is composed of a second band 23 having a second width D larger than the first width d of the first band 22. The energy absorbing unit 30 includes a first portion 28 in which the first band portion 22 and the second band portion 23 are separated from each other, and a second band portion 23 in which the first band portion 22 and the second band portion 23 are separated from each other. An energy absorbing unit 30 in which a second portion 27 in which both are integrally fixed in a state substantially surrounding the first band-shaped portion 22 is disposed adjacent to each other. As another mode of the energy absorbing unit 30 of the second embodiment, Second width D is the energy-absorbing unit 30 is set to be substantially twice the first width d with the aforementioned first strip portion 22.

Further, in the energy absorbing unit 30 according to the present invention, the first band-shaped body 22 constituting the core is provided.
Are configured so as to be almost completely wrapped by the second band-shaped portion 23, and the first band-shaped portion 22 and the second band-shaped portion 23 are connected to each other by the second band-shaped portion 23. A second portion in which the weft 24 of the first band 22 and the weft 25 of the second band 23 are joined to each other by a plurality of binding yarns 26, that is, in a state of being integrally fixed. Second part 2
7 and the entirety of the binding yarn is woven into either the first band-shaped body portion 22 or the second band-shaped body portion 23 as a warp yarn, and the first band-shaped body portion 22 and the second band-shaped body are woven. A separating unit 28 is provided so that the unit 23 can be used separately from the unit 23.

That is, in the energy absorbing unit 30 according to the present invention, the first portion 28 and the second portion 2 each including the first band portion 22 and the second band portion 23 are provided.
7 is a continuous weaving structure using a continuous warp yarn 31 and a binding yarn 26 or a knitting structure, and a specific weaving method will be described in detail below. . Here, in the energy absorbing unit 30 according to the present invention, the binding yarn used in the second portion is the first band-shaped portion or the first band portion in the first portion. It is folded into either one of the two belt-like portions. In the energy absorbing unit 30 according to the present invention, the first portion 28 and the second portion 27 having the above-described configuration are formed such that the first portion 28 and the second portion 27 are formed so as to be alternately formed substantially in the longitudinal direction of the energy absorbing unit. Woven in a band in the direction or
By knitting and appropriately cutting such a product, it is possible to easily obtain an energy absorption unit 30 having a configuration similar to the configuration shown in FIGS.

That is, as shown in FIGS. 3A to 3C, in the present invention, the first portion 28 and the second
The energy absorbing unit 30 having a predetermined length is manufactured by appropriately cutting a narrow band-like body in which the portions 27 are alternately and continuously formed in the longitudinal direction, as shown in FIG. Alternatively, a first portion 28 may be formed at one end and a second portion 27 may be formed at the other end. A first portion 28 is formed at both ends, as shown in FIG.
The second portion 27 may be formed at the intermediate portion.

Further, in the above conventional example, FIG.
As shown in (C), a second portion 27 may be formed at both ends and a first portion 28 may be formed at an intermediate portion.

The first band 22 and the second band 23 in the energy absorbing unit 30 according to the present invention.
The width and length of the integrated portion 27 and the width and length of the separation portion 28 are determined according to the purpose of use, required tensile strength, weaving and knitting structure, warp yarn, weft yarn, binding yarn and the like. It can be determined appropriately and appropriately based on the material. That is, the energy absorbing unit 30 according to the present invention is appropriately adjusted by changing the fineness of the used warp, weft, or binding yarn, the number of used yarns, the use of yarn, the weaving and knitting structure, etc., according to the purpose of use. Things are possible.

Further, in the energy absorbing unit 30 according to the present invention, as apparent from FIG.
End portion 29 of the first band-shaped portion 22 at the portion 27
In the above, both ends 33-1 and 3-3 of the second belt-like body portion 23
3-2 are fixed in a state of being superimposed on each other, and in some cases, are fixed to each other by sewing with a thread other than the binding thread 26 or by an appropriate joining means. Is also good.

That is, in the energy absorbing unit 30 according to the present invention, the first band-shaped portion 22 is overlapped with the second band-shaped portion 23 during the period from the time of manufacture to immediately before use. The ends 33-1 and 33-2 and the one end 29 of the first band-shaped portion are temporarily fixed so as not to be separated. Further, in the first portion 28 of the energy absorbing unit 30 according to the present invention, the first band portion 22 and the second band portion 23 are individually used in a state where they are separated from each other. Therefore, it is not necessary to employ the above-described configuration. However, in order to improve the handling in the manufacturing process, the first portion in the second portion 27 is not used.
End portion 29 of the band-shaped body portion 22 and the second band-shaped body portion 23
It may be desirable that both ends 33-1 and 33-2 are temporarily fixed in a state of being overlapped with each other.

The energy absorbing unit 30 according to the present invention
In actual use, as shown in FIG. 2, for example, in the first portion 28, the overlapped both end portions of the second band-shaped body portion 23 are provided. 33-1 and 33
-2, the first band-shaped portion 22 is configured to be pulled out to the side, and in fact, the first band-shaped portion 22 is connected to the second band-shaped portion 23. Both ends 33 overlapped
From between -1 and 33-2, the second belt 23 is pulled out obliquely to use.

More specifically, for example, the first band-shaped body portion 22 is inserted through an annular metal fitting (D ring) 8 connected to a hook-side rope or belt 9 as shown in FIG. The second belt-shaped body 23 is expanded in a plane and connected to the safety belt 11 on the human body side.

The energy absorbing unit 30 according to the present invention
In this case, it is preferable that the width d of the first band-shaped portion 22 is set to be approximately half of the width D of the second band-shaped portion 23. Can be easily and efficiently inserted into the annular metal fitting (D ring) 8 connected to the hook-side rope or the belt 9 and the like. Ring bracket (D ring)
8 can be maintained at a sufficient level.

On the other hand, in the second band-like portion 23,
In the state before use, it is folded to half the standard width of the conventional safety belt, but at the time of use,
It can be expanded and returned to a width substantially the same as the reference width of the conventional safety belt, and the end can be connected to the safety belt 11 on the human body side very easily by the same method as the conventional one. Therefore, the energy absorbing unit 30 according to the present invention is excellent in overall workability, and in the energy absorbing unit 30, the integrated portion 29 which is usually the second portion is The length is set to a predetermined length and held in a specific container or holding means in a folded state. However, in the energy absorbing unit 30 according to the present invention, the width can be set to half the conventional width, The container or the holding means can be reduced in size and weight.

As the above-mentioned holding means, for example, a heat-shrinkable tube, an appropriate storage case, or the like can be used. That is, in the energy absorbing unit 30 according to the present invention, the first belt-shaped body portion, that is, the core belt 22 and the annular metal fitting (D ring) 8 in the separating portion 28 are moved by the movement of the human body at the time of working at a high place. In many cases, wear between the belts becomes a problem. However, in the present invention, the core belt 22 is inevitably tough because the core belt 22 or the multi-woven structure such as double weaving is employed. The wear resistance is improved and the safety is improved.

Further, in the energy absorbing unit 30 according to the present invention, the energy absorption is improved. In other words, even if the energy absorbing unit 30 according to the present invention is used and falls down unfortunately during work at height, the energy absorbing unit 3 according to the present invention can be used.
0, that is, a first band-shaped portion 22 joined to the annular metal fitting (D-ring) 8 in the first portion 28 and a second band-shaped portion 23 connected to the safety band 11. Between the first band-shaped body portion 22 and the second band-shaped body portion 23 by the load.
6 breaks to absorb the falling energy.

In this case, the principle of absorbing the impact energy is as follows.
The conventional energy absorbing unit simply cuts the sewing thread or binding thread two-dimensionally by applying impact energy in a direction that pulls both narrow belts left and right in directions different from each other by approximately 180 degrees. While absorbing energy, the energy absorbing unit 30 according to the present invention has the first belt-shaped portion, that is, the core belt 2.
When the sheath belt 23, which is the second belt-shaped body, receives the drop impact energy, a tensile force acts on each other in an oblique direction, so that the sheath belt 23 is turned from the core belt 22 while being turned. Since a state in which the binding yarns are separated so as to be peeled off is generated, the individual binding yarns 26 are loaded with energy in an oblique direction. It is configured to break.

That is, in the energy absorbing unit 30 according to the present invention, when the drop impact energy is received, the binding yarn 26 constituting the second portion 27 is randomly broken three-dimensionally and three-dimensionally. As a result, the drop impact energy can be absorbed evenly, and the drop impact energy absorption waveform can be made a flat and stable waveform.

That is, as shown in FIG. 4C, the falling impact energy absorption waveform of the energy absorbing unit 30 according to the present invention shows an extremely stable and smooth shape, whereas the conventional energy absorbing waveform shown in FIG. Figure 4 in the unit
A drop impact energy absorption waveform as shown in FIG.
In addition, the conventional energy absorbing unit shown in FIG. 5 shows a drop impact energy absorption waveform as shown in FIG. 4 (B). In each case, a considerable fluctuation occurs at the time of drop impact energy absorption. Since a strong impact is given to the human body, the danger of damaging the human body is extremely large. On the other hand, the energy absorbing unit 30 according to the present invention can uniformly absorb the drop impact energy as described above. Therefore, it can be seen that the configuration of the energy absorption unit according to the present invention is excellent also in terms of safety for the human body.

The shock energy absorption waveform shown in FIG.
According to the Ministry of Labor's safety belt standard, a 75 kg sandbag
m The energy absorption state when dropped is a measurement of the change in impact load along the time axis. The maximum impact load at the time of a fall according to the safety belt standard of the Ministry of Labor is 900 kg, while the maximum impact load is 900 kg. Uses an energy absorbing unit designed to have a maximum impact load of about 400 kg. In other words, the energy absorbing unit 30 according to the present invention not only improves the workability in manufacturing, but also stabilizes the quality of the energy absorbing unit itself, reduces the size, improves workability at high places, and absorbs the energy falling from the human body. Thus, it has become possible to provide an excellent energy absorption unit that meets all the needs of the industry, such as improvement of the performance.

Hereinafter, a specific example of the method of manufacturing the energy absorbing unit 30 according to the present invention will be described in detail as an example. That is, the energy absorbing unit 30 according to the present invention
Is basically manufactured by weaving or knitting using a narrow-width loom, a needle loom, a narrow-width knitting machine, etc., and in particular, a multi-weave having a double weave structure or a double knit structure or more. It is manufactured by combining tissues.

One example of a narrow-width loom suitable for manufacturing the energy absorbing unit according to the present invention is disclosed in Japanese Patent Application No. 5-159302, entitled "Thick Belt and Its Manufacturing Apparatus", which has already been filed by the present applicant. The disclosed loom can be used. That is, in the present invention, the first
It is necessary to form a multilayer structure in a state where the belt-like body part 22 and the second belt-like body part 23 are overlapped, and for that purpose, it is necessary to adopt at least a triple-woven knitting structure.

Further, in the present invention, it is necessary to alternately form the separation portion 28 as the first portion and the integrated portion 27 as the second portion. Each layer of the triple woven knitting structure is integrally joined by the yarn 26, and in the former, the binding yarn 26 is connected to the first band-like body portion 22 or the second
And woven or knitted so that the layers can be separated from each other. First, FIG. 7 shows an example of a weaving structure when forming the integrated portion 27 as the second portion in the energy absorbing unit 30 according to the present invention.

The energy absorbing unit 30 according to the present invention
In the above, each of the warp and the weft is preferably a synthetic fiber multifilament yarn, and when manufactured by weaving, it is preferable to weave with at least two shuttles.
In the figure, the warp described as ground is the first belt-like body portion 22.
And the warp yarns constituting the second belt-like body portion 23, respectively, and the warp yarn described as “hanging” is a contact that connects the first belt-like body portion 22 and the second belt-like body portion 23 to each other. The tying yarn 26 is shown.

In the embodiment of the present invention, the ground 1 and 4 in FIG. 7 constitute a second belt or sheath belt 23, and the grounds 2 and 3 form a first belt or core. The belt 22 is constituted. The suspensions 1, 2, 3, and 4 form an integrated portion by connecting the sheath belt 23 and the core belt 22 once each in 16 picks. In addition, wefts 1, 2, 3, and 4 indicate the respective driving orders. That is, in the above-mentioned specific example, the weft yarn is woven by two sheds, and an example of the driving order is as follows. 1. The shed is driven into and forms the upper layer of the core belt. 2. Two sheds are driven in to form the upper layer of the sheath belt. 3. One shed is driven in to form the lower layer of the core belt. 4. Two sheds are driven in to form the lower layer of the sheath belt. 5. One shed is driven in to form the upper layer of the core belt. 6. Two sheds are driven in to form the lower layer of the sheath belt. 7. The first shed is driven in to form the lower layer of the core belt. 8. Two sheds are driven in to form the upper layer of the sheath belt.

By driving each of the two types of shuttles according to the above order, the energy absorbing unit 30 of the present invention having a multi-woven structure having a cross section as shown in FIG. 8 is formed. FIG. 9 shows an example of a weaving structure in the case of forming the separation portion 28 as the first portion in the energy absorbing unit according to the present invention.

The display of FIG. 9 is the same as the display of FIG. 7 described above, except that the binding yarn 26 is
1 shows a configuration woven into the slab. That is, in FIG. 9, the ground 1 and 4 constitute a second belt-shaped portion, that is, a sheath belt 23, and the grounds 2 and 3 constitute a first belt-shaped portion, that is, a core belt 2.
Constituting No. 2. The suspensions 1 and 2 serve as binding yarns of the core belt 22 itself, and the suspensions 3 and 4 are woven in alignment with the grounds 2 and 3 of the core belt 22. That is, all the binding yarns 26 are woven into the core belt 22, and the core belt 22 and the sheath belt 23 are separated to form the separation portion 28.

In the energy absorbing unit according to the present invention, the binding yarn is woven by appropriately combining woven structures as shown in FIGS. 10 (A) to 10 (D). In addition, in FIG.10 (A)-FIG.10 (D), (circle) shows a weft. In addition, the energy absorbing unit 30 according to the present invention
In another embodiment, a part of the main woven structure or the main knitting structure constituting the second portion may include a woven structure or a knitting structure different from the main woven structure or the main knitting structure.

That is, basically, the woven structure or knitted structure of the second portion 27, which is an integrated part of the energy absorbing unit according to the present invention, is uniform from the viewpoint of ease of production and production cost. Although it is desirable that the second part 2 is included in the process of absorbing the drop impact energy,
If the length is not sufficient, it cannot be said that there is no danger of the energy absorbing unit being separated before the falling motion of the worker stops, so that such a dangerous state is prevented from occurring. For this purpose, it is desirable to provide the stopper means 32 on a part of the integrated part 27 which is the second part of the energy absorbing unit.

Therefore, in another embodiment of the present invention, the stopper means 32 may be a part of the main weaving structure or main knitting structure that constitutes the second part, and may be a main weaving structure or main knitting structure. By including a woven structure or a knitted structure different from the structure, a function as a stopper is provided. Therefore, the organization concerned is the second
It is desirable that the structure has a tensile strength several steps higher than the tensile strength of the main woven structure or main knitted structure constituting the portion.

According to the present invention, the stopper means 32 having a weaving structure or knitting structure different from the main weaving structure or main knitting structure is provided at the end of the second portion or a portion close to the end, and It is desirable that they are arranged along the width direction 2. FIG. 11 shows an example of a weaving structure constituting the stopper means 32.

The display of FIG. 11 is the same as that of FIG.
Although a detailed description is omitted, in the stopper means 32, the tissues of the grounds 1 and 2 are exchanged, and the tissues of the grounds 3 and 4 are exchanged.
Since the warp yarns constituting the sheath belt 23 are all replaced, it is possible to maintain approximately twice the strength of the conventional structure.

Next, an example of specific manufacturing conditions of the energy absorbing unit 30 according to the present invention will be described. Example 1 (when the same type of fiber is used) First belt-shaped body portion Warp Polyester filament yarn 1260d / 2 Number of yarns 135 Weft yarn Polyester filament yarn 1500d / 1 Driving number 31 to 23 picks / 3CM Woven structure 2/2 Double Weaving Second belt-shaped body portion Warp yarn Polyester filament yarn 1260d / 2 Number of yarns 148 Weft Polyester filament yarn 1260d / 2 Number of driving 31-23 picks / 3CM Woven structure 2/2 Double weave Binding yarn Polyester filament yarn 750/1 The number of yarns is 188. The weave structure The second portion is tied once during 16 picks and the first portion is fully woven into the core belt in a double weave of 1/1 or 2/2. Others Separation unit single core Core belt 2430kgf Sheath belt 2750kgf Maximum load at energy absorption of integrated part 390kgf

Example 2 (when different kinds of fibers are used) First belt-shaped portion Warp Nylon filament yarn 1260d / 2 Number of yarns 135 Weft Nylon filament yarn 1680d / 1 Number of driving 31-23 picks / 3CM Woven texture 2 / 2 Double weave Second belt-shaped part Warp Nylon filament yarn 1260d / 2 Number of yarns 148 Weft Nylon filament yarn 1260d / 2 Number of drive 31 to 23 picks / 3CM Woven structure 2/2 Double weave binding yarn Polyester filament yarn 750/1 Number of yarns 128 Weave organization In the second part, it is tied once during 16 picks, and in the first part, it is fully woven into the core belt by a double weave of 1/1 or 2/2. Others Separation unit single body Core belt 2650kgf Sheath belt 2900kgf Maximum load at energy absorption of integral part 420kgf

Example 3 (When Using Stopper Means) Basically, it is the same as Example 2, and the structure of the stopper portion is also the same as FIG. Maximum load at the time of energy absorption of the integral part 420 kgf Strength of the stopper means 1150 kgf To summarize the specific configuration of the energy absorbing unit 30 according to the present invention, the energy absorbing unit 30 substantially includes the first band-shaped body and the second band-shaped body. In a narrow-width belt having a core-sheath structure, the first
Each of the wefts of the second belt-shaped body portion and the second belt-shaped body portion is joined by a plurality of binding yarns, and includes the second portion which is an integral portion, and is connected to the second portion, Weaving or knitting all of the binding yarns into one of the first band-shaped portion and the second band-shaped portion, completely separating the first band-shaped portion and the second band-shaped portion. Including a separate first part,
The first band-shaped portion and the second band-shaped portion of an arbitrary length are alternately continuously woven or braided alternately to form at least one portion of the first band-shaped portion and at least one portion of the first band-shaped portion. The energy absorbing unit is cut at an arbitrary position so as to include the second belt-like body portion to constitute a belt alone.

[0049]

Since the energy absorbing unit according to the present invention has the above-described basic structure, the energy absorbing unit particularly includes the separating portion, that is, the one in the first portion pointed out in the present invention. The first belt-shaped part is formed with a narrow band which is easy to insert into an annular metal member (D-ring) connected to a rope, a hook or the like, so that the size and weight are reduced. Needless to say, the work of inserting into the annular metal member (D ring) is simple and easy, so that the work efficiency is greatly improved. On the other hand, the other belt portion, that is, the second belt-shaped body portion, which is connected to the safety belt for the human body, has a width substantially the same as that of the conventional impact energy absorbing belt by being expanded and used in a planar shape. Since the belt-shaped member having the belt is formed, the same function and effect as those of the conventional impact energy absorbing belt can be exhibited in terms of performance. Further, one of the salient features of the energy absorbing unit according to the present invention is that when a breaking force acts between the first band-shaped portion and the second band-shaped portion, the conventional impact energy 2 in the absorption belt
While the binding yarns between the belts are simultaneously broken one by one and sequentially broken in a plane, the breaking force of the first band portion and the second band portion is oblique to each other. As a result, the binding yarn constituting the integrated portion as the second portion breaks three-dimensionally (three-dimensionally) and randomly, so that the breaking energy can be uniformly absorbed, so that the human body can be absorbed. The impact energy can be stably absorbed by breaking without causing an intermittent impact change.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing a configuration of an energy absorption unit according to the present invention.

FIG. 2 is a diagram illustrating an example of a method of using an energy absorbing unit.

FIGS. 3A to 3C are diagrams illustrating an example of a configuration of an energy absorption unit according to the present invention.

FIGS. 4 (A) to 3 (C) are waveform diagrams comparing the energy absorption characteristics of the energy absorption unit according to the present invention and the conventional energy absorption unit.

FIG. 5 is a diagram showing an example of a conventional energy absorbing unit.

FIG. 6A is a diagram showing another example of a conventional energy absorbing unit, and FIGS.
FIG. 2 is a diagram illustrating a configuration example of a conventional energy absorption unit.

FIG. 7 is a weave organization diagram showing an example of a weave structure of an integrated part 27 which is a second part of the energy absorption unit according to the present invention.

FIG. 8 is a cross-sectional view illustrating a weaving configuration of the energy absorption unit.

FIG. 9 is a weaving diagram showing an example of a weaving structure of a separation section which is a first part of the energy absorbing unit according to the present invention.

FIG. 10 is a diagram showing an example of a weaving structure of a binding yarn 26 used in the energy absorbing unit according to the present invention.

FIG. 11 is a weave diagram showing an example of a weave structure of the stopper portion 32 of the energy absorption unit according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 30 ... Energy absorption unit 2, 3 ... Belt 4 ... Sewing thread 5 ... Integral part 6 ... Separation part 8 ... Connection ring (D ring) 11 ... Safety band 22 ... First band-shaped part 23 ... Second band-shaped body Part 24 ... Weft yarn of the first band-like body part 25 ... Weft yarn of the second band-like body part 26 ... Binding yarn 27 ... Second part, integrated part 28 ... First part, separation part 29 ... First One end portion of the band-shaped portion 31 ... Continuous warp yarn 32 ... Stopper portions 33-1 and 33-2 ... End portions of the second band-shaped body portion

Claims (16)

(57) [Claims] 1. A first band-shaped portion having a first width and the first band-shaped portion are formed separately from each other, and are larger than a first width of the first band-shaped portion. An energy absorbing unit constituted by a second band-shaped body having a second width;
The energy absorbing unit includes a first portion in which the first band portion and the second band portion are separated from each other, and a second portion in which the second band portion is the first band portion. The second part is in a state where both are integrally fixed while substantially surrounding the part.
An energy absorption unit characterized by being disposed adjacent to the above. 2. The apparatus according to claim 1, wherein a second width of the second band is set to be approximately twice as large as a first width of the first band. The described energy absorption unit. 3. A woven structure or a knitted structure using a continuous warp yarn in each of a first portion and a second portion composed of the first band portion and the second band portion. The energy absorbing unit according to claim 1, wherein the energy absorbing unit is integrally formed. 4. The second portion has an integrated structure in which the first band-shaped portion and the second band-shaped portion are connected and fixed to each other by an appropriate binding thread. The energy absorbing unit according to any one of claims 1 to 3, wherein 5. An end portion of the first band portion in the second portion, which is fixed to each other in a state where both end portions of the second band portion are overlapped. The energy absorbing unit according to claim 1, wherein: 6. The first portion is configured such that the first band portion is drawn laterally from between the overlapped both ends of the second band portion. The energy absorption unit according to any one of claims 1 to 5, wherein 7. The first band-shaped part is inserted into an annular metal fitting (D ring) connected to a hook-side rope or belt or the like, and the second band-shaped part is The energy absorbing unit according to any one of claims 1 to 6, wherein the energy absorbing unit is expanded in a plane and connected to a safety belt on a human body side. 8. The first band-shaped portion is provided between the overlapped both ends of the second band-shaped portion and one end of the first band-shaped portion from during manufacturing to immediately before use. The energy absorbing unit according to any one of claims 1 to 7, wherein the energy absorbing unit is temporarily fixed so as not to separate. 9. The main weaving structure or main knitting structure constituting the second portion includes a main weaving structure or a weaving structure or knitting structure different from the main knitting structure. 3. The energy absorbing unit according to 3. 10. The weaving structure or knitting structure different from the main weaving structure or main knitting structure is arranged at the end of the second portion or a portion near the end and along the second width direction. The energy absorbing unit according to claim 9, wherein: 11. The energy absorbing unit according to claim 3, wherein the woven structure of the first band portion in the first portion and the second portion has a multi-woven structure. 12. The energy absorbing unit according to claim 3, wherein the woven structure of the second band portion in the first portion and the second portion has a multi-woven structure. 13. The woven structure integrally forming the first band-shaped portion and the second band-shaped portion in the second portion has a multi-woven structure. Item 3. An energy absorbing unit according to Item 3. 14. A narrow belt having a core-sheath structure substantially comprising a first band-shaped portion and a second band-shaped portion.
Each of the wefts of the second belt-shaped body portion and the second belt-shaped body portion is joined by a plurality of binding yarns, and includes the second portion which is an integral portion, and is connected to the second portion, Weaving or knitting all of the binding yarns into one of the first band-shaped portion and the second band-shaped portion, completely separating the first band-shaped portion and the second band-shaped portion. Including a separate first part,
The first band-shaped portion and the second band-shaped portion of an arbitrary length are alternately continuously woven or braided alternately to form at least one portion of the first band-shaped portion and at least one portion of the first band-shaped portion. An energy absorbing unit characterized in that a belt alone is formed by cutting at an arbitrary position so as to include the second belt-shaped portion. 15. The warp yarn, the weft yarn and the binding yarn in the first band member and the second band member are made of the same kind of synthetic fiber. The energy absorption unit according to any one of the above. 16. The warp yarn, the weft yarn and the binding yarn in the first band-shaped portion and the second band-shaped portion are made of different kinds of synthetic fibers. The energy absorption unit according to any one of the above.