JPH0661874B2 - Rubber pipe structure - Google Patents

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber pipe-shaped structure having a rubber having mechanical anisotropy in at least a part thereof, and more specifically, a rubber pipe-shaped structure which exhibits a peculiar deformation behavior such as twisting when bent and bending when twisted. A pipe-shaped structure, which can be used for an operating arm in the mechanical industry field, a pipe-shaped structure in the space industry field, a toy that exhibits a peculiar behavior, a sunday article, etc. by utilizing the above-mentioned peculiar deformation behavior Is. Conventional technology Conventionally, in pipe structures made of isotropic materials such as iron and aluminum, when a load is applied to a point on the geometric main axis and only bending is applied, only bending occurs and twisting occurs. Absent. On the other hand, when a load is applied to a point that is not on the geometrical principal axis and bending and twisting is applied, bending and twisting occur. That is, as shown in FIGS. 25 and 26, one end of the pipe-shaped structure 1 made of the above isotropic material is a fixed end 1a and the other end is a free end 1b. When a load is applied so that the line of action intersects with the geometric main axis G of the pipe-shaped structure 1 as indicated by the middle arrow A, the pipe-shaped structure 1 is deflected by the above-mentioned load, as indicated by the broken line in the figure. But it is not twisted. On the other hand, as shown in FIG. 27 and FIG. 28, the line of action is indicated by an arrow B at an arbitrary point on the free end 1b of the pipe-shaped structure 1 as shown in FIG. When a load that does not intersect with G is applied, the pipe-shaped structure 1 is bent and twisted as shown by a broken line. DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In a pipe-shaped structure made of an isotropic material, the above-described deformation behavior is exhibited, but peculiar deformation behaviors other than such behavior, for example, bending when twisting, bending when twisting,
In addition, when bending and twisting is applied, it is not possible to cause a deformation behavior such that it bends but does not twist. By the way, FRP (fiber reinforced resin) is known as an anisotropic material as opposed to isotropic materials such as iron and aluminum as described above, and isotropic by using the FRP in a pipe-shaped structure. It is possible to provide the above-mentioned mechanical properties which cannot be obtained by the pipe-shaped structure made of a flexible material. However, since the FRP generally has a very small breaking elongation, only a small deformation can be performed in the case of a pipe-shaped structure. Further, FRP has a high elastic modulus and rigidity, and a large force is required for deformation. The present invention has a peculiar deformation behavior as described above, that is, when one end is a fixed end and the other end is a free end, a load is applied so that the line of action does not intersect with the elastic main shaft, while bending and twisting, on the elastic main shaft. When a load is applied to a point at and bending and twisting, it behaves as if only bending occurs and no twisting occurs, and it has a low elastic modulus, low rigidity, is easily deformed with a small force, and has a large fracture extension. It is an object of the present invention to provide a pipe-shaped structure that can be largely deformed. Incidentally, the elastic main axis, unlike the geometrical main axis, refers to the axis of symmetry when considering the elastic modulus, in the case of the present invention, even if a load is applied, it bends, but does not twist, It refers to the axis that connects the fixed end of the pipe. Therefore, according to the present invention, at least a part in the circumferential direction of a pipe-shaped structure, at least a part of which in the thickness direction of the part is made of rubber having anisotropy, the orientation direction of the rubber is The present invention provides a rubber pipe-shaped structure characterized by being different from other portions. Further, the present invention relates to a pipe-shaped structure made of rubber having anisotropy, wherein at least a part of the pipe-shaped structure in the circumferential direction and at least a part of the thickness direction of the part of the pipe-shaped structure and the geometrical direction. An object of the present invention is to provide a pipe-shaped structure made of rubber having an anisotropy different from other portions in the angle formed by the target principal axis. Further, the present invention comprises a rubber having anisotropy and a rubber having no anisotropy, wherein the rubber having anisotropy is used in at least a part of the pipe-shaped structure in the circumferential direction and in the thickness direction of the part. Provided is a rubber pipe-shaped structure which is provided in at least a part and whose angle formed by the orientation direction of the rubber and the geometric main axis is different from that of other rubber having no anisotropy. In the present invention, the portion in which the angle formed by the orientation direction and the geometrical principal axis is different is, for example, a portion which is symmetrical with respect to the geometrical principal axis of the pipe-shaped structure, and has a cylindrical coordinate with respect to the pipe-shaped structure. In the case of, the angle between the orientation direction and the geometrical principal axis is different between the 0 ° ≦ θ ≦ 180 ° portion and the 180 ° <θ ≦ 360 ° portion. More specifically, when the angle between the orientation direction of the above 0 ° ≦ θ ≦ 180 ° and the geometric main axis is oriented in a positive direction with respect to the geometric main axis, 180 ° <θ ≦ 360 °
There is a combination in which the angle formed by the orientation direction of the part and the geometric main axis is made negative with respect to the geometric main axis. In the present invention, as described above, at least part of the pipe-shaped structure in the circumferential direction and at least part of the thickness direction of the part are made different in orientation direction, and the elastic main axis of the pipe-shaped structure is desired. Is set to. Further, the rubber having the above mechanical anisotropy is a base rubber 100.
A rubber composition containing 3 to 100 parts by weight of an α, β-unsaturated fatty acid metal salt and 0.5 to 5.0 parts by weight of an organic peroxide, and containing no other orientation-imparting agent, is subjected to a unidirectional shearing force. After kneading and kneading, it is vulcanized and molded. Action In the pipe-shaped structure made of rubber having mechanical anisotropy according to the present invention, at least a part in the circumferential direction (preferably, a part symmetrical with respect to the geometrical principal axis) or the whole in the thickness direction, or Since the angle with respect to the geometric main axis of the pipe-shaped structure in the orientation direction is different in any part of the thickness direction, it is possible to positively utilize the characteristics of the mechanical anisotropy of the rubber. . With this configuration, the elastic main axis is displaced from the geometrical main axis,
When one end is a fixed end and the other end is a free end, it bends and twists when a load is applied so that it does not pass through the point on the elastic spindle, while an arbitrary load is passed through the point on the elastic spindle. When applied, it is possible to produce a unique deformation behavior that only bends and does not twist. Further, since the pipe-shaped structure according to the present invention is made of rubber, it can be easily deformed with a low rigidity and a low elastic modulus and a small force, and can be largely deformed because of its large breaking extension. EXAMPLES Next, the present invention will be described in detail based on the examples shown in the drawings. In the first embodiment of the pipe-shaped structure made of rubber having mechanical anisotropy according to the present invention shown in FIGS. 1 to 3, the pipe-shaped structure 11 has two inner and outer peripheries in sectional shape.
It is a cylindrical pipe consisting of two concentric circles. The pipe-shaped structure 11 is molded from rubber having mechanical anisotropy, and the rubber is manufactured by the following method. First, 80 parts by weight of butadiene rubber as a base rubber and 20 parts by weight of natural rubber, 65 parts by weight of basic zinc methacrylate as a metal salt of α, β-unsaturated fatty acid, 0.7 parts by weight of an antioxidant and an organic peroxide. As dicumyl peroxide 1.
A rubber composition containing 0 parts by weight is kneaded by a roll 5 while applying a shearing force in the circumferential direction R as shown in FIG. It is generally known that a metal salt of an α, β-unsaturated fatty acid is co-crosslinked with rubber to give high hardness and high durability. However, the rubber composition 6 as described above is kneaded while applying shearing force. Then,
Crystals of basic zinc methacrylate, which is a metal salt of an α, β-unsaturated fatty acid, are oriented in the same orientation direction F as the circumferential direction R of the roll (the inventors have confirmed by X-ray irradiation). To do. Next, when the rubber composition 6 is vulcanized and molded in the mold as it is, the strength is extremely strong in the orientation direction F of the basic zinc methacrylate and the elongation is small (high rigidity, high elastic modulus, Small elongation at break), different direction, especially strength is not so high in the direction forming 90 ° with the orientation direction, and elongation is large (low rigidity, low elastic modulus, large elongation at break) A rubber having properties is obtained. The kneading of the rubber composition is not limited to the method using rolls, and can be performed using, for example, an extruder. In this case, the orientation direction matches the extrusion direction. The pipe-shaped structure 11 of this example is divided into two parts in the circumferential direction, and the rubber composition sheet 12 is formed into a mold 14 by a mandrel 13 as shown in FIG. After being charged, they were vulcanized and molded under the conditions of 160 ° C. for 30 minutes to form a pipe shape. Alternatively, as shown in FIG. 6, the mandrel 13 may be used to charge the metal mold 14 in a state in which sheets having a larger width are sequentially placed from a sheet 12 'having a smaller width. As shown in FIGS. 2 and 3, the pipe-shaped structure 11
The orientation direction F of the rubber having mechanical anisotropy that constitutes
Cylindrical coordinates so that the geometric main axis G of the pipe-shaped structure 11 becomes the Z axis

Taking [(r, θ, Z)], in the portion 11a where 0 ° ≦ θ ≦ 180 ° shown in FIG. 2, α = 30 ° in the positive direction with respect to the Z axis regardless of r and Z. It has an angle. However, the size of α is not limited to the above, and α> 0
It suffices if the relationship of α and α ≠ 180 ° is satisfied. On the other hand, the part 11 of 180 ° <θ ≦ 360 ° shown in FIG.
In b, the orientation direction F is β, which is a negative direction with respect to the Z axis.
The angle is -30 °. That is, β is set so that β = −α. The angle α, β formed by the orientation direction of the rubber sheet 12 with respect to the geometrical principal axis is set by the cutting method of the molded rubber sheet as shown in FIGS. The orientation direction F of the rubber sheet 12 is α (30 °) or β (-30) with respect to the axial center (geometrical principal axis G) of the mandrel 13.
°). As described above, the angle of at least a part of the pipe-shaped structure 11 in the circumferential direction with respect to the geometric main axis G of the orientation direction F of the rubber having mechanical anisotropy is a portion symmetric with respect to the geometric main axis G. By using the characteristic of the rubber having the above-mentioned mechanical anisotropy, the pipe-shaped structure 11 of the present embodiment causes a deviation between the geometric main axis G and the elastic main axis E. ing. In this example, the base rubber of the rubber having mechanical anisotropy, the compound and the composition thereof are not limited to those described above, and 100 parts by weight of the base rubber and α-β-unsaturated fatty acid are used. Any material containing 3 to 100 parts by weight of metal salt and 0.5 to 5.0 parts by weight of organic oxide may be used. For example, as the base rubber, all rubber components conventionally used in rubber compositions can be used. In addition to the above-mentioned butadiene rubber, styrene-butadiene rubber, E
PDM, natural rubber and the like are generally used. A particularly preferred base rubber is cis-1,4-polybutanediene having a cis structure of 90% or more. The metal salt of α, β-unsaturated fatty acid oriented in the grain direction of the rubber when kneading the rubber composition has 3 to 8 carbon atoms.
A metal salt of an α, β-unsaturated carboxylic acid having is preferable, and examples thereof include metal salts of acrylic acid, itaconic acid, crotonic acid, and the like in addition to the above-mentioned methacrylic acid. The metal is generally a divalent metal, preferably zinc, magnesium or the like, but other metals such as sodium or lithium may be used. The blending amount of the metal salt of the α, β-unsaturated fatty acid is 3 to 10 relative to 100 parts by weight of the base rubber.
It is 0 part by weight, preferably 10 to 70 parts by weight. If it is less than 3 parts by weight, the strength will not be anisotropic and the desired effect will not be achieved. If the amount exceeds 100 parts by weight, the composition becomes hard,
Workability is poor and moldability is poor. Examples of the organic peroxide include perbenzoic acid, benzoyl peroxide, cumene peroxide and the like in addition to the above-mentioned dicumyl peroxide, and dicumyl peroxide is preferable. The compounding amount of the organic peroxide is 0.5 to 5.0 parts by weight based on 100 parts by weight of the base rubber. If it is less than 0.5 part by weight, it is difficult for the metal salt of α, β-unsaturated fatty acid to crosslink,
If it exceeds 5.0 parts by weight, the molded product becomes brittle, which is not practical.
The compounding amount of organic peroxide is 1.
0 to 3.0 parts by weight is preferable. Next, the operational characteristics of the pipe-shaped structure having the above structure will be described. First, as shown in FIG. 8, one end of the pipe-shaped structure 11 having a length L'of the present embodiment has a fixed end 11c and the other end has a free end 11.
d. In the above state, the jig 15 is fitted to the tip of the pipe-shaped structure 11 as shown in FIG. 9, and the weight 16 is hung on the jig 15, and the elastic main shaft E as shown in FIG. 10 and FIG.
When a load indicated by an arrow C which does not pass through the upper point is applied downward, the pipe-shaped structure 11 is bent and twisted as shown by a chain line in FIGS. 10 and 11. On the other hand, as shown in FIG. 12, the jig 18 is fitted into the tip of the pipe-shaped structure 11 and the weight 19 is hung from the protruding rod-shaped portion 18a of the jig 18, thereby making it possible to obtain the structure shown in FIGS. When a downward load is applied so as to pass through the point on the elastic main axis E as shown by the arrow D, as shown by the chain line in FIGS. 13 and 14, bending occurs, but twisting occurs. There is no. That is, the pipe-shaped structure 11 of the present embodiment is bent and twisted only when a load is applied so as to pass through a point that is not on the elastic main axis and only bending is applied, while a point on the elastic main axis E is applied. As a result, even if bending and twisting is applied, bending occurs but it does not twist. Although the relationship between α and β is β = −α in the present embodiment, the relationship between α and β is not limited to this relationship, and the relationship α ≠ β may be satisfied. In the second embodiment shown in FIG. 15, the pipe-shaped structure 21 has the same shape as in the first embodiment, and when the cylindrical coordinates are taken so that the geometric main axis G becomes the Z axis, 10 ° ≦ θ. ≤150 °
As shown in FIG. 16, in the portion 21a of the alignment direction F,
The angle with respect to the geometrical principal axis G is α ′ = 60 °, and the other portions, that is, 0 ° ≦ θ <10 ° and 150 ° <θ
In the portion 21b of <360 °, as shown in FIG.
The angle formed by the orientation direction F and the geometrical principal axis G is β ′ = 20 °
I am trying. The relationship between α ′ and β ′ is not limited to the above values, and it is sufficient that the relationship α ′ ≠ β ′ is satisfied. The division of the portions 21a and 21b is not limited to the above angle. Also in the second embodiment, as described above, the angle of at least a portion of the pipe-shaped structure 21 in the circumferential direction with respect to the geometric main axis G with respect to the orientation direction F is symmetric with respect to the geometric main axis G. Since they are different, the geometrical principal axis G and the elastic principal axis E are deviated. Therefore, the same effect as that of the first embodiment is produced. Next, a third embodiment shown in FIG. 18 is configured by combining a rubber sheet having anisotropy and a normal rubber sheet having no anisotropy. That is, the shape of the pipe-shaped structure 31 is the same as that of the first embodiment, but if the cylindrical coordinates are taken so that the geometric main axis G becomes the Z axis, then 60 ° ≦ θ ≦
A rubber sheet having anisotropy is used in the portion 31a of 120 °, and the orientation direction F is α ″ = 60 ° with respect to the geometrical principal axis G, as shown in FIG.
Using a rubber sheet having anisotropy also in the portion 31b where ≦ θ ≦ 300 °, as shown in FIG. 20, β ″ = − 60 ° with respect to the geometrical principal axis of the orientation direction F. ″
The value of is not limited to the above value and may satisfy the relationship α ″ ≠ β ″. Portions other than the above-mentioned portions 31a and 31b, that is, a portion 31 of 0 ° <θ <60 ° and 120 ° <θ <300 °
For c, a normal rubber sheet having no anisotropy is used. Also in the third embodiment, as described above, the pipe-shaped structure 3 is used.
Since the angle of the orientation direction F of at least a part of the circumferential direction 1 with respect to the geometric main axis G is different from that of the other parts, the geometric main axis G and the elastic main axis E are deviated. Therefore, the same effects as those of the first and second embodiments are produced. The pipe-like structure 41 of the embodiment shown in FIG. 4 shown in FIG. 21 is constructed by laminating only rubber sheets having anisotropy, has the same shape as that of the first embodiment, and has the above-mentioned mechanical anisotropy. Five layers of rubber sheets having properties are laminated. When the cylindrical coordinates are taken so that the geometric main axis G of the pipe-shaped structure 41 becomes the Z axis, in the portion 41a where 30 ° ≦ θ <360 °,
The orientation direction F of all the layers laminated in the thickness direction (r direction) is 30 ° with respect to the Z axis. On the other hand, 0 ° ≦ θ <30
In the portion 41b of 90 °, the pipe-like structure 41 in the thickness direction (r
Direction), the orientation direction is different. That is, the orientation direction is set to 30 ° with respect to the Z-axis from the first layer to the second layer inside the pipe of the rubber sheet, and −30 ° from the third layer to the fifth layer from the inside of the rubber sheet. I am trying. Also in the fourth embodiment, as described above, since the orientation direction F of at least a part of the pipe-shaped structure 41 in the circumferential direction and a part of the thickness direction thereof is different from the other parts, the geometric main axis G and There is a gap between the elastic main axis E and
The same effect as that of the first embodiment is obtained. In the fifth embodiment shown in FIG. 22, the pipe-shaped structure 51 is formed by laminating five sheets of rubber having mechanical anisotropy and has the same shape as that of the first embodiment. If the geometrical principal axis G of the pipe-shaped structure 51 is taken as the Z axis and the columnar coordinates are taken, the orientation direction is made different in the thickness direction (r direction) of the pipe-shaped structure 51. That is, in the range from the first layer to the second layer inside the rubber sheet, the orientation direction is 30 ° with respect to the elastic main axis regardless of θ, while the third layer to the fifth layer of the rubber sheet are arranged. In the eye range, the orientation direction is changed depending on the circumferential direction, and in the portion 51a where 0 ° ≦ θ <180 °, the orientation direction is −30 ° with respect to the Z axis, and 180 ° ≦ θ <360 °.
In the portion 51b, the orientation direction is 60 °. Also in the fifth embodiment, as described above, at least a part of the pipe-shaped structure 51 in the circumferential direction has a different orientation direction of the part in the thickness direction from the other part, so that the elastic main axis E is different. And a geometrical main axis G are deviated from each other, and the same effect as the first embodiment is produced. In the fourth and fifth embodiments described above, the angle formed by the orientation direction and the geometrical principal axis is not limited and may be different from each other, and the number of layers in which the orientation direction is different is also limited. Not a thing. As described above, the pipe-shaped structure made of rubber having mechanical anisotropy according to the present invention does not pass through a point on the elastic spindle when one end is a fixed end and the other end is a fixed end. A pipe-like structure made of a conventional isotropic material, which has the mechanical characteristics that it bends and twists when a load is applied, while it bends and does not twist when an arbitrary load is applied so that it passes through a point on an elastic spindle. It has a unique deformation behavior that cannot be obtained with.

[Experimental example]

In order to investigate the mechanical characteristics of the pipe-shaped structure made of rubber having mechanical anisotropy according to the present invention, an experiment was performed to measure the amount of deformation when bending was applied. This experiment was carried out in the first embodiment shown in FIG.
A pipe-shaped structure in which the orientation direction of one half-circumferential portion 11a is all α = 20 ° with respect to the geometrical principal axis and the orientation direction of the other half-circumferential portion 11b is β = −20 °, similarly α = 30.
A pipe-shaped structure was prepared in which β and β were −30 °. And, for those having these two types of orientation directions, pipes having the following three types of (shape 1) to (shape 3) were created, and experiments were conducted on a total of 6 types of pipe-shaped structures. . (Shape 1) Outer diameter φ1 = 18 mm, inner diameter φ2 = 5 mm, length L = 120 m
m, number of laminated rubber sheets 3 layers (shape 2) outer diameter φ1 = 18 mm, inner diameter φ2 = 9 mm, length L = 120 m
m, number of laminated rubber sheets 2 layers (shape 3) outer diameter φ1 = 35 mm, inner diameter φ2 = 13 mm, length L = 310
mm, number of laminated rubber sheets 5 layers The experimental method is as shown in FIG.
Of the pipe-shaped structure 11 from the fixed end 11c to the fixed end 11c by tightening with a chuck to form the fixed end 11c and the free end 11d.
For 100 mm and (shape 3), L '= 260 mm was projected. In this state, a jig 15 shown in FIG. 9 is used to apply a load P = 0.5, 1.0 kg by a weight W in the vertical direction with the intersection of the free end 11d and the geometrical main axis G as a point of application, and The deflection amount and the twist angle were calculated from the vertical displacement of the tip of the pointer 17 mounted horizontally on the end 11d. From the results of the above-described experiment, as shown in Table 1 below, it can be confirmed that the material is flexible and twisted even though only bending is applied. From the experimental results, the deviation ε of the elastic principal axis E from the geometrical principal axis G shown in FIG. 24 is a value as shown in Table 2 below according to the angle between the orientation direction and the geometrical principal axis. I found out. From the above results, it was confirmed that the deflection amount, the twist angle, and the deviation of the elastic main axis can be adjusted by controlling the angle formed by the orientation direction and the geometric main axis. Effect As is apparent from the above description, in the pipe-shaped structure according to the present invention, at least a part of which is made of rubber having mechanical anisotropy, at least a part of the circumferential direction of the pipe-shaped structure, at least a part of the part in the thickness direction. Since the angle of the orientation direction of the rubber having anisotropy used for the above with respect to the geometrical principal axis is different from that of the other portions, a deviation can be caused between the geometrical principal axis and the elastic principal axis. Therefore, when one end of the pipe-shaped structure is a fixed end and the other end is a free end, when a load that does not pass through a point on the elastic spindle is applied, bending and twisting occur, and When a load is applied so as to pass through a point on the main shaft, it is possible to cause a special deformation behavior in which only bending occurs and it is not twisted, and it is twisted when bent or bent when twisted. In addition, the pipe-shaped structure made of rubber having the above-mentioned mechanical anisotropy is divided into a circumferential portion of an angle with respect to the geometric main axis in the orientation direction and a portion with the same angle with respect to the geometric main axis of the orientation direction. It is possible to easily change the amount of deviation of the elastic main axis from the geometrical main axis by changing the above. Furthermore, since the pipe-shaped structure according to the present invention is made of rubber having mechanical anisotropy and has low rigidity, low elastic modulus, and large fracture elongation, the special deformation behavior as described above is generated with a small force. It has various advantages such as being capable of being greatly deformed, and by utilizing the deformation behavior, it can be utilized in various industrial fields.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of a pipe-shaped structure made of rubber having mechanical anisotropy according to the present invention, FIG. 2 is a plan view showing an orientation direction of FIG. 1, and FIG. Is a bottom view showing the orientation direction of FIG. 1, FIG. 4 is a schematic view showing a method of molding anisotropic rubber, and FIGS. 5 and 6 are perspective views showing a method of manufacturing the pipe-shaped structure of FIG. FIGS. 7 (A) and 7 (B) are schematic diagrams showing a method for setting the orientation direction of a rubber sheet having anisotropy, and FIG. 8 fixes one end of the pipe-shaped structure of FIG. FIG. 9 is a perspective view showing a state in which the jig is attached, FIG. 9 is a perspective view showing attachment of a jig, and FIGS. 10 and 11 show deformation when a load is applied to the free end of the pipe-shaped structure of FIG. FIG. 12 is a schematic view showing the attachment of a jig, and FIGS. 13 and 14 are changes in the case where a load is applied to the free end of the pipe-like structure shown in FIG. FIG. 15 is a perspective view showing a second embodiment of the present invention, FIGS. 16 and 17 are schematic views showing the orientation direction of FIG. 15, and FIG. 18 is a third embodiment of the present invention. An example perspective view, FIG. 19 and FIG.
FIG. 8 is a schematic view showing the orientation direction of FIG. 8 and FIG.
FIG. 22 is a perspective view showing an embodiment, FIG. 22 is a perspective view showing a fifth embodiment of the present invention, FIG. 23 is a schematic view of an experimental apparatus for a pipe-like structure according to the present invention, and FIG. A schematic diagram showing the deviation between the geometrical principal axis and the elastic principal axis (a diagram in which FIG. 23 is viewed from above), and FIGS. 25 to 28 show a load applied to the free end of a pipe-shaped structure made of an isotropic material. It is the schematic which shows the modification at the time of adding. 1a, 11c ... fixed end, 1b, 11d ... free end, 11, 21, 31, 41, 51 ... pipe-shaped structure, G ... geometric main axis, E ... elastic main axis, F ... orientation direction.

Claims (4)

[Claims] 1. A pipe-shaped structure, at least a part of which in the circumferential direction, at least a part of which in the thickness direction is made of rubber having anisotropy. A rubber pipe-shaped structure characterized by being different from the part. 2. A pipe-shaped structure made of rubber having anisotropy, wherein at least part of the pipe-shaped structure in the circumferential direction has at least part of the orientation direction in the thickness direction of the other part. A rubber pipe-shaped structure different from the part. 3. The rubber having anisotropy is a base rubber 100.
A rubber composition containing 3 to 100 parts by weight of a metal salt of an α, β-unsaturated fatty acid and 0.5 to 5.0 parts by weight of an organic peroxide and containing no other orientation-imparting agent is unidirectionally sheared. The pipe-shaped structure according to claim 1 or 2, which is obtained by vulcanizing after kneading. 4. The elastic main axis of the pipe-shaped structure is set at a desired position by changing the orientation direction of at least part of the pipe-shaped structure in the circumferential direction and at least part of the thickness of the pipe-shaped structure. The pipe-shaped structure according to claim 1, wherein the pipe-shaped structure is set to.