JP2002013573A - Shock absorber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shock absorber which is particularly suitable for cushioning against displacement (dynamic load) by a load (tension) of a transmission line and the like (high-voltage cables), has a simple and compact structure, is easy to handle, has excellent durability for a long period of time, has greater buffer effect even if displacement by dynamic load is big, and demonstrates flexible buffer effect. SOLUTION: In the shock absorber for dynamic load, the shock absorber comprising: a buffering body provided with a lamination layer body formed by laminating a metal and a rubber, a buffering body mounting part for fixing the buffering body, a lever body rotatably supported on the one end of the buffering body mounting part, an action lever connected to the buffering body and rotatably supported on the one end of the lever body, and a tension loaded part rotatably supported on the other end of the lever body and loaded with tensile force. A preferred embodiment is the application to the buffering against the vibration of the transmission line in which the other end of the buffering body mounting part connected to an insulator for isolation and the tension loaded part is the transmission line.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shock absorber which has a large shock-absorbing effect on dynamic loads and is particularly suitable for power transmission lines.

[0002]

2. Description of the Related Art Transmission lines (high-voltage lines) are extended over a long distance while being suspended from a plurality of high-voltage towers.
The power transmission line is usually connected to an arm portion of the high-voltage tower via an insulator for insulation. In the vicinity of the insulator, the load (tension) due to the transmission line is concentrated, and in fact, a load (tension) of about 2000 kgf is applied per one transmission line. This load (tension)
Increases when the power transmission line vibrates due to natural phenomena such as snow on the power transmission line or wind or rain on the power transmission line, and actually increases to about 2600 to 3000 kgf. However, conventionally, since the power transmission line is directly connected to the insulator, it is not possible to buffer the vibration of the power transmission line, and a load (tension) is generated near the insulator.
And the arm parts of the insulator or the high-voltage tower are damaged, and replacement thereof is frequently required.

For this reason, the transmission line is connected to the insulator via a buffer member such as a coil spring or a rubber member, and the vibration of the transmission line is buffered by utilizing the buffering action of the buffer member. It is also considered to eliminate. However, in this case, the buffer action of the buffer member changes with time.
It is difficult to maintain a sufficient buffering action for a long period of time due to deterioration, and it is easy to cause breakage or the like near the buffering member or its connection portion. Therefore, a long cushioning member is required, which is inconvenient in terms of grounding space and handling. Further, when a large load (tension) is applied to the buffer member, there is a problem that the buffer member is greatly displaced and extended.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems and achieve the following objects. That is, the present invention is particularly suitable for buffering a load (tension) such as a transmission line (high-voltage wire) against a displacement (dynamic load), has a simple and compact structure, and is easy to handle.
An object of the present invention is to provide a shock absorbing device which has excellent durability over a long period of time, has a large shock absorbing effect even when the displacement of a dynamic load is large, and exhibits a soft shock absorbing effect.

[0005]

Means for solving the above problems are as follows. That is, <1> a shock absorber for a dynamic load, a shock absorber provided with a laminated body formed by laminating metal and rubber, a shock absorber attaching portion for fixing the shock absorber, and a shock absorber attaching portion A lever rotatably supported at one end of the lever, an operating rod connected to the buffer and rotatably supported at one end of the lever, and the other end of the lever And a pulling force load portion rotatably supported by the portion and loaded with a pulling force. <2> The shock absorber according to <1>, wherein the other end of the shock absorber mounting portion is connected to the insulating insulator, the tensile load portion is a power transmission line, and is used to buffer vibration of the power transmission line. <3> The above-mentioned <1> or <2>, wherein the laminate is a rubber member having a metal plate fixed to at least one end surface of a rubber member having parallel and opposed end surfaces. It is a shock absorber. <4> The cushioning device according to <3>, wherein the rubber composite member is provided with a through-hole in a direction parallel to each other and orthogonal to the end faces facing each other, and a rod is inserted into the through-hole. <5> The above <1> or <2>, wherein the laminate is a laminate structure in which thin metal layers and thick rubber layers are alternately laminated.
>. <6> wherein the rubber is chloroprene rubber (CR);
The shock absorber according to any one of <1> to <5>. <7> The rubber according to <1>, wherein the rubber is natural rubber (NR), and the surface of which is covered with chloroprene rubber (CR).
5> The shock absorber according to any one of the above. <8> The above <1 wherein the surface of the metal is treated with zinc phosphate.
> The buffer device according to any one of <7>.

[0006] In the shock absorber according to the above <1>,
A point of the lever body that is pivotally supported by the shock absorber mounting portion acts as a fulcrum, and a point where the tensile force load portion and the lever body are pivotally supported by each other acts as a force point. The point at which the lever and the lever are mutually supported acts as an action point. The working rod is connected to the buffer. Further, the lever is rotatably supported at one end of the buffer mounting portion, and the pulling force load portion is rotatably supported at one end of the lever, and Since the rod is rotatably supported by the other end of the lever, the load (tension) applied to the tensile force load unit is determined by the principle of leverage.
It is loaded and acts on the buffer. Then, by the principle of leverage, the load (tension) applied to the buffer from the tensile force load portion is attenuated and absorbed by the elastic deformation of the rubber constituting the laminate in the buffer.
The shock absorber can have a small and simple structure,
In addition to easy handling, the load (tension) applied to the shock absorber can be easily controlled by appropriately adjusting the distance of the force point from the fulcrum and the distance of the action point from the fulcrum. can do. Further, in the shock absorber, since a laminated body formed by laminating metal and rubber has a shock absorbing action, it is excellent in long-term durability as compared with a case where a spring or rubber alone is used, and displacement of a dynamic load is reduced. Even if it is large, the buffer effect is large and shows a soft buffer effect.

[0007] The shock absorber according to <2> is characterized in that:
In <2>, the other end of the buffer mounting portion is connected to an insulating insulator, the tensile load portion is a transmission line, and is used to buffer vibration of the transmission line. For this reason, the load (tension) applied to the power transmission line acts on the buffer according to the principle of leverage. Due to this principle of leverage, the load (tension) applied to the buffer from the tensile force load portion is attenuated and absorbed by the elastic deformation of the rubber constituting the laminate in the buffer. Therefore, a large load (tension) is not applied to the insulating insulator,
No breakage or the like occurs in the insulating insulator.

[0008] The shock absorber according to <3> is characterized in that:
> Or <2>, the laminated body is formed by laminating a rubber composite member in which a metal plate is fixed to at least one end surface of a rubber member having parallel and opposed end surfaces. For this reason, according to the principle of leverage, the load (tension) applied to the buffer from the tensile force load portion is attenuated and absorbed by the elastic deformation of the rubber constituting the laminate in the buffer. . In the rubber composite member, since a metal plate is fixed to at least one end surface of a rubber member having end surfaces that are parallel and opposed to each other,
The rubber composite member has excellent strength and does not break. Since the laminate is an aggregate of the rubber composite member, the buffer having the laminate is easy to handle, has excellent maintainability, and its buffer performance can be arbitrarily and easily changed. .

[0009] The shock absorber described in the above <4> is characterized in that:
>, The rubber composite member is provided with a through hole in a direction parallel to each other and perpendicular to the opposing end faces,
A rod is inserted into the through hole. For this reason, the load (tension) applied to the buffer from the tensile load section is:
The rubber penetrating the rod-like body is elastically deformed along the rod-like body, so that it is effectively attenuated and absorbed.

[0010] The shock absorber according to the above <5> is characterized in that:
> Or <2>, the laminate is a laminate structure in which thin metal layers and thick rubber layers are alternately laminated. For this reason, by the principle of leverage, the load (tension) applied to the buffer from the tensile load portion is attenuated and absorbed by the elastic deformation of the rubber constituting the laminated structure in the buffer. You. Since the laminated structure is formed by alternately laminating a thin metal layer and a thick rubber layer,
The laminated structure has excellent strength and does not break.

[0011] The shock absorber according to <6>, wherein
In any one of> to <5>, the rubber is natural (N
R) Rubber. For this reason, by the principle of leverage, the load (tension) applied to the buffer from the tensile force load portion is effectively attenuated by the elastic deformation of the natural (NR) rubber,
Absorbed.

[0012] The shock absorber described in the above <7> is characterized in that:
In any one of> to <6>, the surface of the rubber is covered with chloroprene rubber. For this reason, the rubber in the buffer has excellent durability.

[0013] The shock absorber according to <8> is characterized in that:
In any one of> to <7>, the surface of the metal is treated with zinc phosphate. For this reason, the metal in the buffer is hardly corroded and has excellent durability.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION A shock absorber according to the present invention comprises a shock absorber,
It has a buffer mounting part, a lever, a tensile load part, and a working rod, and has members appropriately selected as needed.

-Buffer- The buffer has no particular limitation on its size, shape, structure, etc. except that it has a laminated body formed by laminating metal and rubber. It can be selected as appropriate.

--Laminate-- In a preferred embodiment of the laminate, for example, a rubber composite member in which a metal plate is fixed to at least one end face of a rubber member having end faces parallel to each other and facing each other is stacked and arranged. And a laminated structure in which thin metal layers and thick rubber layers are alternately laminated. Among them, in the former case, the rubber composite member is provided with a through hole in a direction parallel to each other and orthogonal to the end faces facing each other, and a mode in which a rod is inserted into the through hole, In the case of (1), a through hole is provided in the laminating direction of the metal layer and the rubber layer, and a mode in which a rod-shaped body is inserted into the through hole is such that the rubber member or the rubber layer is broken. It is more preferable from the standpoint of preventing the occurrence of the above. The metal plate and the metal layer are required from the viewpoint of obtaining a required spring constant (K), and may be omitted if a desired spring constant (K) can be obtained without them. . In this case, there is no problem such as rust generated on the metal plate or the metal layer, which is advantageous in cost.

The number of the rubber members in the rubber composite member or the number of the rubber layers in the laminated structure can be appropriately selected according to the purpose, but is one or more, and three or more. Preferably, five or more are more preferable.

The shape of the rubber composite member or the laminated structure may be such that the thickness of the rubber member in the rubber composite member is l, or the thickness of the rubber layer in the laminated structure is l. Or, when the diameter of the laminated structure is t, it is preferable that t ≧ 2l,
The shape ratio S [shape ratio S (= 1 / 4t)] is preferably １ ／ or more. When t <1, buckling may occur.

The spring constant (K) of the laminate is 2
Under a load of 000 kgf, 20 to 30 (N / m
m) (that is, 2-3 kgf / mm).

The material of the metal plate or the metal layer in the laminate is not particularly limited as long as it can impart rigidity that does not easily cause a buckling phenomenon when subjected to shear deformation, and is appropriately selected according to the purpose. Examples thereof include simple metals such as iron and alloys such as stainless steel. These materials may be used alone or in combination of two or more. The metal plate or the metal layer is preferably surface-treated from the viewpoints of durability, corrosion resistance, adhesion to rubber, and the like. The surface treatment is not particularly limited and may be appropriately selected depending on the intended purpose. For example, a treatment with zinc phosphate and the like are preferred.

The thickness of the metal plate or the metal layer in the laminate is not particularly limited and can be appropriately selected depending on the material, the size of the input, the purpose, and the like.
It is about 0.5 to 10 mm.

The material of the rubber member or the rubber layer in the laminate is not particularly limited and may be appropriately selected depending on the intended purpose. For example, chloroprene rubber,
Synthetic rubbers such as natural rubber and diene rubber are exemplified. Among these materials, in the case of power transmission lines, ozone is generated near the power transmission lines due to high voltage, and the ozone concentration is high.
R) is preferable, and natural rubber (NR) is preferable from the viewpoint of preventing set (permanent deformation) due to long-term use. These materials may be used singly or may be used alone.
More than one species may be used in combination.

The thickness of the rubber member or the rubber layer in the laminate is not particularly limited, and can be appropriately selected depending on rubber hardness, required spring constant, lever ratio, purpose, and the like. Is 10 when φ is 250 mm
It is about 0 mm.

[0024] A surface coating layer may be provided on a peripheral side surface of the rubber member or the rubber layer in the laminate for the purpose of improving weather resistance, durability and the like. As the material of the surface coating layer, for example, chloroprene rubber, butyl rubber, acrylic rubber, silicone rubber, fluorine rubber, polysulfide rubber,
Examples include ethylene / propylene rubber, chlorosulfonated rubber, polyurethane, polyethylene, chlorinated polyethylene, and ethylene vinyl acetate rubber. These are 1
Species may be used alone or in combination of two or more. These may be used by blending with natural rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, nitrile rubber and the like. Among them, in the case of power transmission lines, ozone is generated near the power transmission line due to high voltage, and the ozone concentration is high,
Chloroprene rubber (CR) is particularly preferred. In the present invention, natural rubber (NR) can be suitably used as a material of the rubber member or the rubber layer in the laminate, and chloroprene rubber (CR) can be suitably used as a material of the surface coating layer.

In the laminate, the bonding between the rubber member and the metal plate, or the bonding between the rubber layer and the metal layer when the rubber layer and the metal layer are bonded and fixed, are performed using a known adhesive or the like. be able to.

The shape and size of the rubber member and the metal plate or the rubber layer and the metal layer in the laminate are not particularly limited, and can be appropriately selected according to the purpose. Usually, there are many columnar shapes, quadrangular prism shapes and the like, and those having a central portion punched out are also preferably used. The shape in which the central portion is punched is advantageous in that the buffering capacity can be appropriately adjusted.

-Buffer mounting portion-The buffer mounting portion is not particularly limited as long as it has a function of fixing the buffer, and can be appropriately selected depending on the purpose. Are transmission lines (high-voltage lines)
When used for buffering against vibrations, it is preferable that the buffer mounting portion be a rod or plate having one end connected to the insulator and the other end connected to the lever. The material of the buffer mounting portion is not particularly limited as long as it has excellent strength, durability and the like, and can be appropriately selected according to the purpose. The connection between the buffer mounting portion and the buffer may be performed by welding, or may be performed using screws, rivets, or the like.

-Lever Body-The lever body is not particularly limited as long as it has excellent strength, durability and the like, and its shape, structure, size, material and the like can be appropriately selected according to the purpose. However, the shape is preferably a rod-like body, and the material is preferably made of metal. Both ends of the lever are formed in two forks parallel to each other, and at both ends, through holes are formed in a direction perpendicular to the axial direction and in a direction parallel to the two forks. Have been. The T-shaped convex portion formed at the end of the tensile force load portion and the working rod is rotatably and non-detachably engaged with the through hole.

The lever is connected to one end of the buffer mounting portion so as to be rotatably supported. For the connection, connection means in a known link device can be suitably adopted. For example, a through hole is provided in the lever body, and a protrusion that is rotatably and irremovably engageable with the through hole is provided at an end of the buffer body mounting portion, so that the lever body and the buffer are provided. Can be connected to the body attachment part.
Further, a well-known bearing or the like may be provided at the connection portion, and a preferable example of the bearing is a slide bearing such as a thrust bearing or a journal bearing.

The connection position of the lever with the buffer mounting portion, that is, the position of the fulcrum is not particularly limited and can be appropriately selected according to the purpose. Due to the principle of leverage, the load (tension) applied to the buffer connected to the working rod increases, and, for example, the distance between the fulcrum and the tensile force loading unit is the distance from the working rod. When the position is at a position that is five times as large as the above, a load (tension) that is five times the load (tension) applied to the tension load portion is applied to the working rod, and the displacement amount of the working rod is , The displacement amount in the tensile force load portion
/ 5.

-Tension Force Loading Unit- The tension force loading unit is rotatably supported by the other end of the lever body and is loaded with a pulling force. The tensile load portion is not particularly limited as long as it has excellent strength, durability, etc., and its shape, structure, size, etc. can be appropriately selected depending on the purpose. It is preferable that a T-shaped convex portion rotatably and undetachably engageable with a through hole provided at a fork of the other end of the lever body is a rod-shaped body formed at one end thereof, and the like. The material is preferably made of metal. As the tensile force load unit, for example, when the shock absorber is used for buffering vibration of a transmission line (high-voltage electric wire), the tensile force load unit is connected to the transmission line (high-voltage electric line). Input the displacement of the load (tension) caused by the vibration of the (high-voltage wire).

-Working rod-The working rod is connected to the buffer and is rotatably supported at one end of the lever. The working rod is not particularly limited as long as it has excellent strength, durability and the like, and its shape, structure, size, etc. can be appropriately selected according to the purpose. It is preferable that the lever-shaped body is a rod-shaped body or the like having a T-shaped protrusion formed at one end thereof that is rotatable and irremovably engageable with a through hole provided at one end of the lever. Is preferably made of metal. . For the connection between the working rod and the lever, a connection means in a known link device can be suitably adopted, and a known bearing or the like may be provided at the connection portion. For example, a sliding bearing such as a thrust bearing and a journal bearing is preferably exemplified. As the working rod, for example, when the shock absorber is used to buffer vibration of a transmission line (high-voltage wire), the working rod is connected to the transmission line (high-voltage wire), and the transmission line (high-voltage wire) The load (tension) from the tensile force load unit, to which the displacement of the load (tension) caused by vibration of the electric wire) is input, is transmitted to the buffer.

The shock absorber of the present invention is a shock absorber for a dynamic load, and can be particularly suitably used for damping a displacement (dynamic load) of a load (tension) in a transmission line (high-voltage wire) or the like.

[0034]

1 to 3 show an embodiment of the present invention.
The present invention is not limited to these examples.

FIG. 1 is a schematic explanatory view showing an embodiment of the shock absorber of the present invention. As shown in FIG.
0 is a buffer 20, a buffer mounting portion 30, a lever 40
, A tension load unit 50, and a working rod 60. As shown in FIG.
The rod body 10 connected to the arm part 102 of the high-voltage tower 101 for suspending (a plurality of branch electric wires 105 are connected)
3 is provided near the insulator 104 fixed thereto. In the related art, for example, as shown in FIG. 4, the shock absorber 10 is not provided, and the transmission line 100 is directly connected to the insulator 104.

As shown in FIG. 3, the cushioning member 20 comprises a rubber composite member 21 in which a metal plate 22a and a metal plate 22b are fixed to both end surfaces of a rubber member 23 having substantially parallel and opposite end surfaces. Eleven are accommodated in the container 26 and are arranged in a stacked manner. The rubber composite member 23 is provided with a through hole 24 in a direction orthogonal to the both end faces.
The rod 25 is inserted into the fourth member 4. The cross-sectional shapes of the metal plates 22a and 22b and the rubber member 23 in a direction perpendicular to the axial direction of the through hole 24 are circular. The metal plate 22a
In the vicinity of the portion where the through-hole 24 is provided in the metal plate 22b, a gentle step is provided as shown in FIG. Further, both end surfaces of the rubber member 23 have shapes conforming to the shapes of the metal plates 22a and 22b, and a slight constriction is provided on the peripheral side surface of the rubber member 23.

When the thickness of the rubber member 23 is 1 and the diameter of the rubber composite member 21 is t, the shape ratio S [shape ratio S (= 1/4 t)] of the rubber composite member 21 is 1/8 or more. It is. The spring constant (K) of the shock absorber 20 is 20 to 30 (N / mm) (2 to 3 kgf) under a load of 2000 kgf.
/ Mm).

The metal plates 22a and 22b are made of stainless steel and have a thickness of 5 mm. The rubber member 23 is made of natural rubber (NR) and has a thickness of 1
00 mm. On the peripheral side surface of the rubber member 23, a surface coating layer made of chloroprene rubber is provided. Metal plate 2
The rubber members 2a and 22b are bonded to each other with an adhesive.

As shown in FIG. 2, the shock absorber mounting portion 30
One end is connected to an insulator 104 fixed to a bar 103 connected to the arm member 102 of the high-voltage tower 101, and the other end is connected to a lever 40, which is a metal bar. A convex portion is formed at an end of the buffer mounting portion 30. The buffer body attaching portion 30 and the buffer body 20 are connected by welding 31, and the buffer body 20 is fixed to the buffer body attaching portion 30.

The lever 40 has both ends formed in two branches parallel to each other. At both ends, through holes are formed in a direction perpendicular to the axial direction and parallel to the two branches. Is formed. The lever 40 is a metal rod. Connection position of the lever body 40 with the buffer body attaching portion 30,
That is, the position of the fulcrum here is a position at which the distance from the tension load unit 50 is five times the distance from the working rod 60. At this position in the lever 40, a through hole is formed that can engage with the projection provided at the end of the shock absorber mounting portion 30. The protruding portion provided at the end of the buffer mounting portion 30 is engaged with the through hole so as to be rotatable and unable to fall off.

The tensile force loading section 50 is a metal rod, one end of which is connected to a transmission line, and the other end of which is formed with a T-shaped projection. The T-shaped protrusion is rotatably and irremovably engaged with a through hole formed at the other end of the lever body 40. As a result, the tensile force loading unit 50 is
0 is rotatably supported at the other end, and a load (tension) due to vibration or the like of the transmission line is input.

The operating rod 60 has one end connected to the buffer 20 and the other end formed with a T-shaped projection.
The T-shaped projection is rotatably and irremovably engaged with a through hole formed at one end of the lever body 40. As a result, the working rod 60 is rotatably supported at one end of the lever body 40 and receives a load (tension) resulting from vibration or the like of the transmission line. Communicate it to 20.

The operation of the shock absorber 10 is as follows. That is, the point of the lever 40 that is pivotally supported by the shock absorber mounting portion 30 acts as a fulcrum, and the tensile force loading portion 50 and the lever 4
The point at which 0 is pivotally supported acts as a point of force, and the point at which the operating rod 60 and the lever 40 are pivotally supported acts as an acting point.

The working rod 60 is connected to the shock absorber 20, the lever 40 is rotatably supported at one end of the shock absorber mounting portion 30, and the tension load portion 50 is connected to the lever 20. Body 40
And the operating rod 60 is rotatably supported by the other end of the lever 40, so that a load (tension) is applied to the tensile force loading unit 50. Then, the tensile force loading unit 50 is pulled to the opposite side to the buffer 20 side,
Displace. With the displacement of the pulling force load unit 50, the lever 40 rotates around the fulcrum in the direction in which the pulling force load unit 50 is pulled. Then, by the principle of leverage, the working rod 6
0 is displaced toward the buffer 20 side. With the displacement of the action rod 60, the rubber composite member 21 in the buffer 20 is pressed,
The rubber members 23 of the plurality of rubber composite members 21 are elastically deformed in a direction in which the rubber members 23 are compressed. Due to the elastic deformation of the rubber member 23, the load (tensile force) applied to the tensile force applying portion 50 is attenuated, absorbed, and buffered.

In this case, the fulcrum is located at a position where the distance from the tensile force loading section 50 is five times the distance from the working rod 60. For this reason, a load (tension) that is five times the load (tension) applied to the pulling force applying portion 50 is applied to the working rod 60 by the principle of leverage. Transmission line 100
Assuming that the displacement amount of the tensile force loading unit 50 when a load (tension) of 2200 to 3200 kgf is applied is 351 mm, the action rod 60 has 11000 to 1600.
A load (tension) of as much as 0 kgf is applied. At this time, the amount of displacement of the working rod 60 is only １ ／ of the amount of displacement of the tensile force loading unit 50,
Is 351 mm, the displacement of the working rod 60 is only 70.2 mm.

On the other hand, assuming that a rubber or spring-only buffer is used without using the buffer 10,
When a load (tension) of about 2000 to 3000 kgf is applied, it is necessary to buffer the load near the insulator 104 by 20
A buffer device having a very soft buffer capacity of 柔 ら か い 30 N / mm (2 to 3 kgf / mm) is required. The buffer device having the buffer capacity has an outer diameter of about 300 mm and a length of about 3000 mm. It has a very elongated structure. On the other hand, in the case of the shock absorber 10,
A buffer body 20 having an outer diameter of about 300 mm, a length of about 1000 mm is sufficient, and a certain hardness of 700 N / mm (70 kgf / mm) can be used.

As a result, in the case of the shock absorber 10, the structure can be made small and simple, and it is easy to handle. In addition, in the shock absorber 10, the distance of the force point from the fulcrum can be reduced.
By appropriately adjusting the distance of the point of action from the fulcrum, the load (tension) applied to the shock absorber 10 can be easily controlled. In the shock absorber 10,
Since the rubber composite member 21 has an excellent shock-absorbing action, it has excellent long-term durability and a dynamic load displacement as compared with a case where a shock absorber using a spring or rubber alone is used or a case where no shock absorber is used. Even if it is large, the buffer effect is large and shows a soft buffer effect. The buffer device 10 can be particularly suitably used for buffering the displacement (dynamic load) of the load (tension) of the transmission line.

[0048]

According to the present invention, the above-mentioned conventional problems can be solved. The present invention is particularly suitable for buffering a load (tensile force) such as a transmission line (high-voltage line) against a displacement (dynamic load), and is simple. Thus, it is possible to provide a shock-absorbing device which has a compact structure, is easy to handle, has excellent durability over a long period of time, has a large damping effect even when the displacement of the dynamic load is large, and has a soft damping effect.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing one embodiment of a shock absorber according to the present invention.

FIG. 2 is a schematic diagram for explaining an example in which the shock absorber of the present invention is applied to damping of transmission line vibration.

FIG. 3 is a schematic diagram for explaining a rubber composite.

FIG. 4 is a schematic diagram for explaining a state in which a power transmission line is suspended in a related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Shock absorber 20 Buffer 21 Rubber composite member 22a Metal plate 22b Metal plate 23 Rubber member 24 Through-hole 25 Bar-shaped body 26 Container 30 Buffer mounting part 40 Lever 50 Tension load part 60 Working rod 100 Transmission line 101 High voltage steel tower 102 arm part 103 rod 104 insulator 105 branch wire

Claims (8)

[Claims] 1. A shock absorber for a dynamic load, comprising: a shock absorber having a laminated body formed by laminating metal and rubber; a shock absorber attaching portion for fixing the shock absorbing member; and a shock absorber attaching portion. A lever rotatably supported at one end of the lever, an operating rod connected to the buffer and rotatably supported at one end of the lever, and the other end of the lever A pulling force loading portion rotatably supported by the portion and being loaded with a pulling force. 2. The shock absorber according to claim 1, wherein the other end of the shock absorber mounting portion is connected to the insulating insulator, the tensile load portion is a transmission line, and is used for damping vibration of the transmission line. 3. The rubber composite member according to claim 1, wherein the laminated body has a rubber composite member having a metal plate fixed to at least one end surface of a rubber member having parallel and opposed end surfaces. Shock absorber. 4. The shock absorber according to claim 3, wherein the rubber composite member is provided with a through hole in a direction parallel to each other and orthogonal to the opposing end faces, and a rod is inserted into the through hole. 5. The shock absorber according to claim 1, wherein the laminated body is a laminated structure in which thin metal layers and thick rubber layers are alternately laminated. 6. The shock absorber according to claim 1, wherein the rubber is chloroprene rubber (CR). 7. The shock absorber according to claim 1, wherein the rubber is natural rubber (NR) and the surface thereof is covered with chloroprene rubber (CR). 8. The shock absorber according to claim 1, wherein the surface of the metal is treated with zinc phosphate.