JPH09112749A - Flexible piping - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve durability and elongate life of a flexible tube by regulating harmful displacement of the flexible tube caused by harmful vibration, etc. SOLUTION: Two apparatuses are connected by using a flexible tube 2 which is a bellows having such a structure as alternatingly continuing crown parts 20a and valley parts 20c. A regulating member 3 composed of a cord material is tensioned along the longitudinal direction of the flexible tube 2. When the flexible tube 2 is subjected to harmful displacement in the arrow Y1 direction caused by harmful vibration, etc., the tensile force of the regulating member 3 is increased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible pipe for connecting at least two devices that are displaced relative to each other and are spaced apart from each other. The present invention is, for example, in a magnetic levitation railway vehicle, a pipe that connects a superconducting magnet and a refrigerator that are positionally separated from each other and relatively displaced, a refrigerator that is positionally separated from each other and relatively displaced, It can be applied to piping that connects to a compressor.

[0002]

2. Description of the Related Art In order to connect devices separated from each other,
Flexible tubing is often used. For example, there is disclosed a flexible pipe provided with a bellows having a corrugated tube shape in which peaks and valleys are alternately continuous, and a tubular braid surrounding the outer periphery of the bellows (Catalog MS of Swagelok Company).
-01-39). Here, the braid is made of a strip made of a suitable number of wire rods such as stainless steel, and is formed into a cylindrical shape by spirally weaving from one direction and the other so that the strips cross each other. There is. According to this, since the bellows is covered with the braid, it is advantageous to prevent the bellows from excessively expanding due to the pressure of the working fluid flowing inside the bellows.

Further, as shown in FIG. 27, a cylindrical bellows 800 in which peaks 800a and valleys 800b are alternately continuous,
It is known that the bellows 800 is provided with a cushioning material 900 made of a gel-like material that is in close contact with the valley portion 800b (Japanese Utility Model Publication No. 5-31321).

[0004]

However, according to the flexible pipe having the above structure in which the bellows is covered with the braid, the braid merely covers the bellows, and the braid is not fixed to the bellows. Therefore, it is not enough to prevent the harmful vibration of the bellows. Further, the above-mentioned blade easily expands in the longitudinal direction when an internal pressure is applied, so that it easily loosens as it expands, and as a result, it does not function as a restricting member that restricts harmful displacement of the bellows.

Further, in the flexible pipe having the above structure in which the bellows 800 is covered with the cushioning material 900 made of a gel material,
The entire space of the valley portion 800b of the bellows 800 is the cushioning material 90.
It is buried with 0 and is not sufficient to prevent harmful vibration of the wall of the bellows 800. Especially when used in a low temperature region or in an extremely low temperature region where liquid helium or liquid nitrogen is used, there is a problem that the buffer material 900 made of a gel-like substance becomes excessively hard and cannot perform its original function.

Particularly in a bellows, harmful vibrations accompanied by longitudinal waves displaced in the longitudinal direction of the bellows and harmful vibrations accompanied by transverse waves displaced in the direction perpendicular to the axis of the bellows are apt to occur.
The structure described above is not always sufficient to deal with such harmful vibrations involving longitudinal waves and harmful vibrations involving transverse waves. The present invention has been made in view of the above-mentioned circumstances, and its problem is advantageous in suppressing harmful displacement such as harmful vibration of a flexible tube, durability of the flexible tube, and advantageous in extending the life. It is to provide a flexible pipe.

[0007]

According to a first aspect of the present invention, there is provided a flexible pipe, wherein the flexible pipe connects at least two devices separated from each other, and the flexible pipe is arranged along a longitudinal direction of the flexible pipe. It has a cross-sectional area smaller than the area divided by the outer diameter of the non-braided structure and has a non-braided structure restricting member that restricts the displacement of the flexible tube.

According to a second aspect of the present invention, there is provided a flexible pipe which connects at least two devices separated from each other and which has at least one trough portion, and a trough portion along the circumferential direction. And a non-braided restricting member that restricts displacement of the flexible tube and that has a cross-sectional area smaller than the cross-sectional area of the space of the valley portion of the flexible tube.

A flexible pipe according to a third aspect of the present invention is a flexible pipe according to the first or second aspect.
In any one of the above, the wall of the flexible tube is characterized in that the longitudinal section has a wave shape in which peaks and valleys are alternately continuous. The flexible pipe according to claim 4 is the flexible pipe according to any one of claims 1 to 3, wherein the regulating member is a string material, a bar material, a strip material, a film material, a tubular material, or a woven material stretched in the longitudinal direction of the flexible tube. It is characterized by comprising at least one of a cloth material, a net material, and a frame.

A flexible pipe according to a fifth aspect of the present invention is characterized in that, in the fourth aspect, a ring-shaped restraint member that is wound in the circumferential direction of the flexible pipe and restrains the restraint member is provided. . A flexible pipe according to a sixth aspect is the flexible pipe according to any one of the first to fifth aspects, wherein each device includes a first fixing portion to which a regulating member can be connected, and an end portion or an intermediate portion of the regulating member in a longitudinal direction is a first fixing portion. 1 is connected to a fixed part.

A flexible pipe according to a seventh aspect is a flexible pipe according to the first to sixth aspects.
In any one of the above, the flexible tube is provided with a second fixing portion capable of connecting the regulating member, and the intermediate portion or the end portion of the regulating member is connected to the second fixing portion. A flexible pipe according to claim 8 is the flexible pipe according to any one of claims 1 to 5, wherein each device includes a first fixing portion to which the regulating member can be connected, and the flexible tube includes a second fixing portion to which the regulating member can be connected. Equipped with
The longitudinal end of the regulating member is connected to the first fixing portion, and the intermediate portion in the longitudinal direction of the regulating member is connected to the second fixing portion.

A flexible pipe according to a ninth aspect is a flexible pipe according to the first to eighth aspects.
In any one of the above, a cushioning member having a function of suppressing vibration of the flexible tube is disposed between the flexible tube and the restriction member. A flexible pipe according to a tenth aspect of the present invention is the flexible pipe according to any one of the first to ninth aspects, wherein the restricting member is a rod-shaped member extending in the longitudinal direction of the flexible tube and is relatively movable in the longitudinal direction of the flexible tube. It is characterized by being arranged.

A flexible pipe according to an eleventh aspect of the present invention is the flexible pipe according to the first aspect.
10 is characterized in that the regulating member has a net structure having net holes. Claim 1
A flexible pipe according to a second aspect of the present invention is characterized in that, in any one of the first to tenth aspects, the restricting member has a mesh structure having mesh holes, and the mesh has a triangular shape.

A flexible pipe according to a thirteenth aspect of the present invention is the flexible pipe according to the first aspect.
In any one of 10 above, the restriction member is composed of a cord material woven so as to form a mesh structure having mesh holes, and the cord material in the mesh area is slidable with respect to the mesh. To do. A flexible pipe according to a fourteenth aspect is the flexible pipe according to any one of the first to thirteenth aspects, wherein the regulating member is applied with tension in a longitudinal direction thereof.

[0015]

According to the first aspect of the present invention, the restriction member is arranged along the longitudinal direction of the flexible tube. Therefore, even if the devices are relatively displaced so as to be separated from each other and harmful displacement such as harmful vibration is generated in the flexible pipe, harmful displacement such as harmful vibration accompanied by a transverse wave oriented in the direction perpendicular to the axis of the flexible pipe is possible. Even if it is generated in the flexible tube, the tension of the regulating member stretched in the longitudinal direction of the flexible tube increases, and the degree of tension increases. Therefore, the restricting member functions as an obstacle against harmful displacement, and the restricting member restricts harmful displacement such as harmful vibration of the flexible tube.

According to the second aspect, the regulating member is arranged in the valley portion of the flexible tube along the circumferential direction. Therefore, even if the devices are relatively displaced so as to be separated from each other and the harmful displacement such as the harmful vibration is generated in the flexible pipe, the harmful displacement such as the harmful vibration accompanied by the longitudinal wave is generated particularly in the longitudinal direction of the flexible pipe. Even in this case, the restricting member arranged along the circumferential direction of the flexible tube functions as an obstacle, and the restricting member restricts harmful displacement such as harmful vibration of the flexible tube.

Further, according to claim 2, since the cross-sectional area of the regulating member is smaller than the cross-sectional area of the space of the valley portion of the flexible tube,
A gap is formed between the wall surface of the valley and the outer surface of the regulating member. Therefore, the deformation tolerance of the wall of the flexible tube is ensured. The flexible tube is preferably a bellows having a bellows structure in which a peak portion and a valley portion are alternately continuous in a vertical cross section, but a rubber hose or a resin hose may be used in some cases.
In short, any material having flexibility may be used.

As the restricting member, a cord material (including a wire material and a rope) stretched in the longitudinal direction of the flexible tube, a bar material, a band material, a film material, a tubular material, a woven material, a net material, a frame body. Can be configured with at least one of the above. The tubular material and the frame body may be rigid. According to the sixth aspect, since the end portion or the intermediate portion in the longitudinal direction of the regulating member is connected to the first fixing portion of the device, the regulating member can be easily stretched between the devices. When the restricting member is a string material, the first fixing portion can be configured in a hook shape to which the string material can be connected.

According to the seventh aspect, since the middle portion or the end portion of the regulating member is connected to the second fixing portion of the flexible tube, the regulating member can be easily stretched on the flexible tube. When the restricting member is a string material, the second fixing portion may be integrally formed with the restricting member. According to the eighth aspect, the longitudinal end portion of the regulating member is connected to the first fixing portion of the device, and the longitudinal intermediate portion of the regulating member is connected to the second fixing portion of the flexible tube. Therefore, it is easy to stretch the restriction member between the devices. The tensioned form may be such that it is always in a tensioned state, or it may be in a tensioned state when an external force is applied.

According to the ninth aspect, since the buffer member is arranged between the flexible tube and the regulating member, the vibration of the flexible tube can be suppressed. A blade can be used as the cushioning member. Generally, a braid is made of a band made up of an appropriate number of metal-based or organic fiber-based wire rods, and is woven in a spiral shape from one direction and the other so that the bands go under and intersect each other. It is configured in shape.

According to the tenth aspect, the restricting member is a rod-shaped member extending in the longitudinal direction of the flexible tube and is arranged so as to be relatively movable in the longitudinal direction of the flexible tube. Easy to accommodate relative displacement in the longitudinal direction. According to the eleventh aspect, the restricting member has a net structure having net holes. Claim 12
According to the above, since the mesh has a triangular shape, it is easy to obtain a truss structure that can contribute to ensuring strength.

According to the thirteenth aspect, the restricting member is composed of a string material having a mesh structure with mesh holes, and the string material in the mesh area is slidable with respect to the mesh. Over restraint can be suppressed. According to claim 14, since the tension is applied to the regulation member in the longitudinal direction, the tension of the regulation member is easily secured in the longitudinal direction, and the regulation function for regulating the flexible tube by the regulation member is further improved. It can be planned. In addition, it is advantageous to change the natural frequency of the flexible tube to separate the natural frequency of the flexible tube from the normal vibration region.

[0023]

EXAMPLES Each example of the present invention will be described below. Example 1 Example 1 is shown in FIG. FIG. 1 (A)
As shown in FIG. 2, two devices 1 separated from each other are arranged so as to face each other. The type of device 1 is not particularly limited. For example, the device 1 can be configured by a compression unit or a low temperature generation unit in a refrigerator mounted on a magnetic levitation vehicle, a superconducting magnet, or a liquefied helium tank. Alternatively, other devices may be used.

The device 1 has metal connection tubes 10 facing each other. In the vicinity of the root of the connection tube 10 of the device 1,
Hook-shaped first fixing portions 13 made of metal or hard resin having insertion holes 13c are provided so as to face each other. A bellows 2 as a flexible tube is provided in the connection tube 10 of the device 1.
Is connected. The material of the bellows 2 is metal,
A resin may be used depending on the case. In this example, the material of the bellows 2 is stainless steel. The bellows 2 is a bellows tube, and has a corrugated shape in which peaks 20a and valleys 20c are alternately continuous in a longitudinal section in a direction along the longitudinal direction thereof. When the device 1 is the above-mentioned refrigerator, a refrigerant, generally liquid or gaseous helium or nitrogen (pressure: 0.5 to 20 data) passes through the hole of the bellows 2.
Note that ata means absolute pressure.

A ring string-shaped second fixing portion 23 is wound around and fixed to the valley portion 20c located at the middle in the longitudinal direction of the bellows 2. According to this embodiment, the regulation member 3 is a long string material. The cross-sectional area of the string material forming the regulation member 3 is
It is much smaller than the area defined by the outer diameter of the bellows 2. The material of the string material can be appropriately selected according to its application,
Resin, cotton, or metal may be used, but in this example, aramid fiber that is sometimes called Kevlar is used. The aramid fiber may be para-based or meta-based.

Both ends 3s of the string-like regulating member 3 are
The first fixed portion 13 of the device 1 is tied to the insertion hole 13c and
Each is connected to the fixed portion 13. In addition, the regulation member 3
3t in the longitudinal direction of the second is fixed to the bellows 2
It is connected to the fixed portion 23. As a result, the string-shaped regulating member 3 is stretched in the longitudinal direction of the bellows 2. The degree of tension may be such that the preload, which is a preload added in advance, is always in a tension state, or the tension state is in a tension state when an external force in the pulling direction is applied to the regulating member 3. The regulating member 3 and the second fixing portion 23 may be made of the same cord material, or may be made of separate cord materials.

In this example, when at least one of the two devices 1 is relatively displaced, the displacement is transmitted to the bellows 2, whereby harmful vibration as harmful displacement is generated by the bellows 2.
May occur. As for the harmful vibration generated in the bellows 2, the bellows 2 has a direction perpendicular to the axis thereof, that is, an arrow Y1
A transverse wave vibration mode with a transverse wave vibrating in the direction, a longitudinal wave vibration mode with a longitudinal wave in which the bellows 2 vibrates in the longitudinal direction of the bellows 2, that is, the direction of arrow X1, or a three-dimensional vibration in which these are combined. Can be considered.

In other words, according to this embodiment, when the bellows 2 is relatively displaced in the direction perpendicular to its axis, that is, in the direction of the arrow Y1, that is, when the bellows 2 vibrates with transverse waves, the regulating member 3 is used. Is increased, the degree of tension of the restriction member 3 is increased, and the restriction member 3 functions as an obstacle to the displacement of the bellows 2. Therefore, the regulating member 3 restrains and regulates the harmful vibration of the bellows 2. In particular, the stronger the tension of the regulating member 3 is, the more the regulating function of the regulating member 3 is increased, so that the harmful vibration accompanying the transverse wave of the bellows 2 can be effectively suppressed.

That is, the direction perpendicular to the axis of the bellows 2, that is, the arrow Y
Even if the bellows 2 is vibrated with a transverse wave vibrating in one direction, the length of the regulating member 3 whose end portion 3s is stretched over the first fixing portion 13 does not basically extend. The tension of the regulation member 3 increases, and the regulation member 3 effectively restrains the transverse wave vibration of the bellows 2 and suppresses the transverse wave vibration of the bellows 2.

Further, according to this embodiment, it is also advantageous to change the natural frequency of the bellows 2 when the regulating member 3 is always tensioned in the longitudinal direction by the preload which is the preload. Therefore, it is advantageous to separate the natural vibration phenomenon of the bellows 2 having a large amplitude from the normal frequency range of the device 1. Therefore, it is advantageous in reducing or avoiding harmful vibration of the bellows 2 in the normal frequency range, and is advantageous in suppressing damage to the bellows 2.

In particular, according to this embodiment, unlike the cushioning material 900 made of a gel-like substance in the prior art shown in FIG. 27, which is excessively hardened at a low temperature at a low temperature, it is regulated even at a low temperature at a low temperature. The member 3 has a low degree of hardening. Therefore, the regulating member 3 sufficiently functions even at low temperature or extremely low temperature, and is suitable for use in low temperature or extremely low temperature atmosphere. Example 2 Example 2 is shown in FIG. This example has basically the same configuration as the example shown in FIG. However, in the boundary region between the end of the bellows 2 in the longitudinal direction and the connecting tube 10, a first fixing portion 13 in the form of a ring cord made by winding the cord in the circumferential direction is provided. Both ends 3s in the length direction of the regulating member 3 are connected to the respective first fixing portions 13 of the bellows 2. In addition, the lengthwise intermediate portion 3 of the regulating member 3
The t is connected to the second fixing portion 23 of the bellows 2.

The regulating member 3 may be made of the same cord material as the first fixing portion 13 and the second fixing portion 23, or may be made of a separate cord material. Also in this example, basically, the same operational effect as that of the above-described first embodiment is obtained,
When the bellows 2 is relatively displaced in the direction perpendicular to the axis thereof, that is, in the direction of the arrow Y1, the tension of the regulating member 3 increases, and the bellows 2
The harmful member is restrained and restricted by the restricting member 3. Particularly, the stronger the tension of the regulating member 3 is, the more the regulating function of the regulating member 3 is increased, so that the harmful vibration of the bellows 2 can be effectively suppressed. Further, depending on the degree of tension by the restricting member 3, the effect of releasing the natural frequency of the bellows 2 from the normal frequency range of the device 1 can be expected, as described above.

(Embodiment 3) Embodiment 3 is shown in FIG. This example has basically the same configuration as the example shown in FIG. That is, the valley portion 2 at the middle portion in the longitudinal direction of the bellows 2
The second fixing portion 23 in the form of a ring cord is wound around and fixed to 0c. Further, a ring cord-shaped first fixing portion 13a formed by winding and fixing the cord material in the circumferential direction is also provided in a boundary region between the longitudinal end of the bellows 2 and the connection tube 10.
Both ends 3s of the regulating member 3 are connected to the hook-shaped first fixing portion 13 of the device 1. The restriction member 3, the second fixing portion 23, and the first fixing portion 13a may be made of the same cord material, or may be made of separate cord materials. Also in this example, basically, the same operational effect as that of the above-described first embodiment is exhibited, and the harmful vibration accompanied by the transverse wave of the bellows 2 is effectively restrained and regulated by the regulating member 3. Particularly, when the regulating member 3 is strongly strained, the regulating function of the regulating member 3 increases, so that the harmful vibration of the bellows 2 can be effectively suppressed.

Example 4 Example 4 is shown in FIG. This example has basically the same configuration as the example shown in FIG. However, the groove portion 2 at the middle portion in the length direction of the bellows 2
The number of ring string-shaped second fixing portions 23 wound and fixed at 0c is increased. Also in this example, basically, the same operational effects as those of the above-described first embodiment are exhibited. Second
Since the number of the fixing portions 23 is increased, the distance La between the second fixing portions 23 adjacent to each other can be shortened even if the overall length of the bellows 2 is long, so that the harmful vibration of the bellows 2, particularly the bellows 2 is increased. It is advantageous to suppress the harmful vibrations associated with the transverse wave.

(Embodiment 5) Embodiment 5 is shown in FIG. This example has basically the same configuration as the example shown in FIG. That is, the blade 5 functioning as a cushioning member is fitted between the outer peripheral surface of the bellows 2 and the regulating member 3. Similar to the above, the blade 5 uses a strip 5k in which a suitable number of wire rods made of metal fibers or resin fibers such as stainless steel are prepared, and the strips 5k are alternately passed from one direction and the opposite direction. It is woven into a cylindrical shape.

Since the blade 5 can be expected to have a vibration damping effect based on the friction between the wire rods constituting the blade 5 and the like, an effect of further suppressing harmful vibration of the bellows 2 can be expected. The ring-shaped second fixing portion 23 is formed by the blade 5
Is fixed by being wound in the circumferential direction at the outer peripheral portion of the.
The restriction member 3 is a hook-shaped first member fixed to the device 1.
It is also connected to the fixing portion 13 and to the second fixing portion 23 that is a cord material and is wound around the blade 5. As a result, the string-shaped regulating member 3 is stretched in the longitudinal direction. Similarly to the above, the tensioned state may be a state in which the preloading is always in a tensioned state, or a tensioned state when an external force in the pulling direction is applied to the regulating member 3. The regulating member 3 and the second fixing portion 23 may be made of the same cord material, or may be made of separate cord materials. Also in this example, basically, the same operational effect as that of the above-described first embodiment is exhibited, and the harmful vibration of the bellows 2, particularly the harmful vibration accompanied by the transverse wave is restrained by the restricting member 3. Particularly, when the regulating member 3 is strongly strained, the regulating function of the regulating member 3 increases, so that the harmful vibration of the bellows 2 can be effectively suppressed.

Example 6 Example 6 is shown in FIG. This example has basically the same configuration as the example shown in FIG. However, the string-shaped or metal ring-shaped first fixing portion 13 is wound and fastened in the boundary region between the connecting cylinder 10 fixed to the device 1 and the end 5 s of the blade 5.
The ring-string-shaped second fixing portion 23 is circumferentially wound around and fixed to the middle portion of the blade 5 in the longitudinal direction.

The regulating member 3 is a rod-shaped member that is slightly longer than the axial length of the blade 5, and is made of metal or hard resin. The rod-shaped regulating member 3 is arranged in the direction perpendicular to the axis, that is, the arrow Y1.
It has rigidity in the direction. The rod-shaped regulating member 3 is inserted and held in the lube 23i of the second fixing portion 23 and the loop 13i of the first fixing portion 13. Here, the regulation member 3 is allowed to move relative to the blade 5 along the arrow X1 direction. Therefore, even when the blade 5 and the bellows 2 relatively move in the longitudinal direction, the arrow X1
The restricting member 3 which is allowed to move in the relative direction can be dealt with. Moreover, according to this example, the rod-shaped restricting member 3
Since it is possible to equip the blade 5 with the rod-shaped restricting member 3 simply by inserting it into the loop 13i of the fixed portion 13 and the loop 23i of the second fixed portion 23, the manufacturing is easy. The rod-shaped regulating member 3 may have a circular cross section or a rectangular cross section.

Example 7 Example 7 is shown in FIG. This example has basically the same configuration as the example shown in FIG. However, although the first fixing portion 13 fixed to the device 1 has a hook shape having an insertion hole 13c, it is arranged at an appropriate distance, that is, a distance Lb from the central axis of the bellows 2. Both ends 3s in the longitudinal direction of the regulating member 3 are the first
The intermediate portion 3t in the longitudinal direction of the restriction member 3 is connected to the fixed portion 13, and is connected to the second fixed portion 23 via a knot 23p. Therefore, the two restricting members 3 stretched over the first fixing portion 13 are respectively arranged on the front and back sides of the blade 5 and are linearly inclined with respect to the bellows 2, so that the "X-shaped shape" as a whole. Is presenting. Also in this example, against harmful vibrations accompanied by transverse waves of the bellows 2,
Since the regulating member 3 has a regulating function, it is advantageous in suppressing harmful vibrations of the bellows 2 accompanied by transverse waves. In particular, according to this example, since the regulating member 3 has the "X-shape" as a whole, it is advantageous to reduce the directionality of the harmful vibration preventing property.

Example 8 Example 8 is shown in FIG. This example has basically the same configuration as the example shown in FIG. However, the regulating member 3 is not a rod-shaped member but a string member. The restriction member 3 is a ring string-shaped second fixing portion 2.
It may be in the form of being continuous with the cord material constituting the first fixing portion 13 in the form of 3 or a ring cord material, or may be constituted by a separate cord material. Also in this example, basically, the same operation and effect as those of the above-described first embodiment are exhibited, and the harmful vibration of the bellows 2 and the blade 5, particularly the harmful vibration accompanied by the transverse wave is restrained and restricted. In addition, as shown in FIG.
The number of fixed portions 23 may be increased.

(Embodiment 9) Embodiment 9 is shown in FIG. This example has basically the same configuration as the example shown in FIG. However, the number of the ring-string-shaped second fixing portions 23 wound around the outer peripheral portion of the blade 5 is two. In this example, the vibration mode in use of the bellows 2 covered with the blade 5 is grasped, and in the region of the blade 5 corresponding to the antinode Mi having a larger amplitude than the node Mh having a small amplitude in the vibration mode of the bellows 2, The ring-shaped second fixing portion 23 is wound and fixed in advance, and the regulating member 3 is attached to the second fixing portion 23.
The intermediate portion 3t in the longitudinal direction is connected. In this case, it is advantageous to suppress the vibration of the antinode Mi in the vibration mode. The longitudinal end portion 3s of the regulating member 3 is connected to the first fixing portion 13.

(Embodiment 10) Embodiment 10 is shown in FIG.
This example has basically the same configuration as the example shown in FIG.
A string-shaped regulating member 3 is arranged outside the blade 5 along the longitudinal direction. However, outside the bellows 2 and the blade 5, a second restricting member 32 formed of a frame body having a relatively rigidity is provided. The frame has a rectangular frame shape, and its material can be selected from metal and resin. The string-shaped regulating member 3 is connected to the first fixing portion 13, and the string-shaped regulating member 3 is provided.
The intermediate portion 3t of is connected to the second fixed portion 23. Furthermore, both ends 3s in the longitudinal direction of the restriction member 3 are connected to an end 32k of the second restriction member 32 formed of a frame body. Thus, the string-shaped regulating member 3 is stretched along the longitudinal direction of the bellows 2 and the blade 5. Note that the tensioned form may be a form in which the preload, which is a preload, is always in tension, or a form in which it is in tension when an external force is applied. Since the string-shaped restricting member 3 is stretched in the longitudinal direction, it is possible to restrict the harmful vibrations of the bellows 2 and the blades 5, especially the harmful vibrations accompanied by transverse waves. The second restricting member 32 is held in the air in a floating state adjacent to the blade 5, and is not connected to anything other than the string-like restricting member 3. This example is suitable when the device 1 cannot be equipped with the hook-shaped first fixing portion 13.

(Embodiment 11) Embodiment 11 is shown in FIG. This example has basically the same configuration as the example shown in FIG. 2 (B), and the ring string-shaped second fixing portion 23 is wound around the valley portion 20c of the bellows 2 at an appropriate position in the longitudinal direction. It is fixed. The intermediate portion 3t and the end portion 3s of the string-shaped regulating member 3 are connected to the second fixing portion 23, respectively. Thereby, the regulation member 3 is stretched. Since the string-shaped restricting member 3 is stretched in the longitudinal direction, it is possible to restrict the harmful vibrations of the bellows 2 and the blades 5, especially the harmful vibrations accompanied by transverse waves. According to this example, it is effective when harmful vibration occurs in the intermediate region in the longitudinal direction of the bellows 2. Further, it is advantageous to save the length of use of the string-shaped regulating member 3.

(Embodiment 12) Embodiment 12 is shown in FIG. This example has basically the same configuration as the example shown in FIG. 8 (A), and the ring string-shaped second fixing portion 23 is wound around and fixed to an appropriate portion of the valley portion 20c of the bellows 2. There is. The end portion 3 of the string-like regulating member 3 is attached to the second fixing portion 23.
s and the intermediate portion 3t are connected to each other, whereby the restriction member 3 is stretched. Further, another restricting member 3 is also stretched, and as a result, a plurality of cord-like restricting members 3 along the longitudinal direction of the bellows 2 are arranged in series.

(Embodiment 13) Embodiment 13 is shown in FIG.
This example has basically the same configuration as the example shown in FIG.
A second restricting member 32 formed of a frame body having a relatively rigidity is arranged outside the bellows 2. A ring string-shaped second fixing portion 23 is wound around and fixed to the valley portion 20c in the middle of the bellows 2 in the longitudinal direction. This second
An intermediate portion 3 in the longitudinal direction of the string-shaped regulating member 3 is fixed to the fixing portion 23.
t is connected, and both end portions 3s in the longitudinal direction of the regulating member 3
Are connected to the second restriction member 32. The frame-shaped second restricting member 32 is held in a floating state in the air while being provided adjacent to the bellows 2, and is not connected to anything other than the string-like restricting member 3. This example is suitable when the device 1 cannot be equipped with the hook-shaped first fixing portion 13.

(Embodiment 14) Embodiment 14 is shown in FIG.
Shown in This example has basically the same configuration as the example shown in FIG. 3, and a regulating member 3 made of a cylindrical tubular member is fitted and held on the outer peripheral portion of the blade 5. The end portion 3s in the longitudinal direction of the regulation member 3 is connected to the connection tube 10 of the device 1.
Siege. The material of the regulating member 3 may be metal or hard resin.

In this example, even if the blade 5 and the bellows 2 try to vibrate in the direction perpendicular to the axis, that is, in the direction of the arrow Y1, that is, when they try to vibrate in the transverse wave, the regulating member 3 made of a tubular material has the braid 5 and the bellows 2 of the braid 5 and the bellows 2. Controls transverse wave vibration.
Further, the regulating member 3 made of a tubular material is capable of relative vibration with respect to the blade 5 in the longitudinal direction, that is, in the arrow X1 direction.
Therefore, when the blade 5 and the bellows 2 relatively move in the longitudinal direction due to the thermal expansion or the thermal contraction accompanying the change of the use environment temperature, it is advantageous that the regulating member 3 corresponds to the movement in the longitudinal direction.

EXAMPLE 15 Example 15 is shown in FIG.
Shown in This example has basically the same configuration as the example shown in FIG. Blade 5
A regulating member 3 made of a cylindrical material having a cylindrical shape is fitted and held on the outer peripheral portion of the. Restriction member 3 as described above
The longitudinal end portion 3s of the device surrounds the connection tube 10 of the device 1. According to this example, the regulating member 3 is configured as an integrated machine by spirally winding a long strip along the circumferential direction of the blade 5. In this example as well, even if the blade 5 and the bellows 2 try to vibrate in the direction perpendicular to the axis, that is, the arrow Y1 direction, that is, the transverse wave vibration, the regulating member 3 made of a tubular material causes the braid 5 and the bellows 2 to vibrate in the transverse wave vibration. Regulate. The material of the regulating member 3 may be metal or resin having a certain degree of rigidity.

(Embodiment 16) Embodiment 16 is shown in FIG. In this example, a regulating member 3 made of a cylindrical tubular material is provided on the outer periphery of the bellows 2 having a ring-shaped end 2m.
Are fitted and held. The regulating member 3 includes a heat insulating material 3n made of a tubular metal foil having heat insulating property, and the like.
It is configured by laminating an appropriate number of layers with a net material 3 m wound in a tubular shape.

In this example, the peak portion 20a of the bellows 2 is in face-to-face contact with the inner peripheral surface of the regulating member 3. Further, a ring-shaped restraining member 70 having a ring shape that makes at least one round in the circumferential direction of the bellows 2 is provided on the outer peripheral portion of the restricting member 3. This improves the holding property of the regulation member 3. The ring-shaped restraint member 70 may be made of metal or resin. In this example, even if the bellows 2 tries to vibrate transversely in the direction perpendicular to the axis, that is, in the direction of the arrow Y1, the regulating member 3 made of a tubular material is
The transverse wave vibration of the bellows 2 is regulated. Furthermore, since the peak portion 20a of the bellows 2 is in face-to-face contact with the inner peripheral surface of the regulating member 3, an effect of regulating longitudinal wave vibration of the bellows 2 can be expected. Further, in this example, since the heat insulating material 3n made of a tubular metal foil or the like having heat insulating properties is used, it is advantageous to suppress the temperature rise of the refrigerant even when the refrigerant passes through the bellows 2. .

(Embodiment 17) Embodiment 17 is shown in FIG.
Shown in In this example, the valley portion 20c at an appropriate location of the bellows 2
The ring-shaped second fixing portion 23 is wound around and fixed to the. Further, a string-like regulating member 3 is stretched around the outer periphery of the bellows 2. The restriction member 3 is connected to the ring-shaped first fixing portion 13. According to this example, the regulating member 3 is woven into a net structure having net holes. The second fixing portion 23 and the regulation member 3 may be made of the same cord material or may be made of separate cord materials.

Further, according to this example, as can be understood from FIG. 12 (A), the string-like regulating member 3 has a triangular shape as a whole, and has a truss structure which is advantageous for ensuring strength. Therefore, it is advantageous to control the harmful vibration of the bellows 2. According to this example, the string-shaped regulating member 3 has the mesh 3
It is slidable with respect to f in the length direction of the cord, that is, in the direction of arrow C1. Therefore, when the bellows 2 is deformed, excessive restraint by the regulating member 3 can be reduced or avoided.

(Embodiment 18) Embodiment 18 is shown in FIG.
Shown in This example also has basically the same configuration as the example shown in FIG. 12 (A), and the regulating member 3 has a net structure in which net holes are formed. The ring-string-shaped second fixing portion 23 and the regulating member 3 may be formed of the same string material or may be formed of separate string materials. The string-shaped regulating member 3 is slidable with respect to the mesh 3f in the length direction of the string, that is, in the direction of the arrow C1.

(Embodiment 19) Embodiment 19 is shown in FIG. 13B is a diagram viewed from the arrow M1 direction in FIG. 13A, and FIG. 13C is a diagram viewed from the arrow M2 direction in FIG. 13A. In this example, the blade 5 is fitted on the outer peripheral portion of the bellows 2. Further, a string-like regulating member 3 is formed on the outer peripheral portion of the blade 5 so as to form a mesh hole and is stretched in a mesh structure. Further, as can be understood from FIG. 13, the regulating member 3
The net hole has a triangular shape as a whole, and has a truss structure that is advantageous for securing strength, and is advantageous for suppressing harmful vibration of the bellows 2 and the blade 5. Further, the string-shaped regulating member 3 is slidable with respect to the mesh 3f in the length direction of the string, that is, in the direction of arrow C1. Therefore, excessive restraint by the regulating member 3 is prevented. Therefore, when the bellows 2 is deformed, the string-shaped regulating member 3 can favorably cope with it. The second fixing portion 23 and the regulation member 3 may be made of the same cord material or may be made of separate cord materials.

(Embodiment 20) Embodiment 20 is shown in FIG.
Shown in In this example, a string-shaped regulating member 3 is arranged along the longitudinal direction of the bellows 2. Then, the string-like regulating member 3 is fixed in a stretched state by the second fixing portion 23 formed of an adhesive or a welded portion attached to the outer peripheral portion of the mountain portion 20a of the bellows 2 in an intermittent arrangement. In this example as well, the distance Ld of the regulating member 3 between the second fixing portions 23 basically does not extend, so that the regulating function of the regulating member 3 that regulates the bellows 2 against harmful vibrations accompanied by transverse waves is secured, and the bellows 2 is secured. The harmful vibration of can be regulated.

(Embodiment 21) Embodiment 21 is shown in FIG.
Shown in Also in this example, the string-like regulating member 3 is arranged along the longitudinal direction of the bellows 2. Then, the second fixing portion 23 made of an adhesive or a welding portion that is continuously adhered in a straight line in the peak portion 20a and the valley portion 20c of the bellows 2.
Thus, the string-shaped regulating member 3 is fixed in a stretched state. Also in this example, the regulating function of the regulating member 3 can regulate the harmful vibration accompanied by the transverse wave of the bellows 2. Further, according to the present embodiment, since the second fixing portion 23 made of an adhesive or a welded portion is continuous in a straight line, the harmful vibration accompanied by a longitudinal wave in the direction of the arrow X1 of the bellows 2 can be restricted. You can take advantage.

(Embodiment 22) Embodiment 20 is shown in FIG.
Shown in In this example, the blade 5 is fitted to the bellows 2, and the string-shaped regulating member 3 is arranged along the longitudinal direction of the blade 5. Then, the second fixing portion 23, which is an adhesive or a welding portion, is intermittently attached to the outer peripheral portion of the blade 5 at an appropriate interval, so that the string-like regulating member 3 is formed.
Is fixed to the blade 5 in a stretched state. Also in this example, the restricting member 3 has a restricting function of restricting the transverse wave vibration of the bellows 2, and the harmful vibration of the blade 5 and the bellows 2 is suppressed.

(Embodiment 23) Embodiment 23 is shown in FIG.
Shown in In this example, the blade 5 is fitted to the bellows 2, and the string-shaped regulating member 3 is arranged along the longitudinal direction of the blade 5. Then, the string-shaped regulating member 3 is fixed to the blade 5 in a stretched state by the second fixing portion 23 made of an adhesive or a welding portion continuously and linearly attached to the outer peripheral portion of the blade 5.

(Embodiment 24) Embodiment 24 is shown in FIG.
Shown in In this example, the blade 5 is fitted to the bellows 2, and the string-like regulating member 3 is wound around and fixed to the outer peripheral portion of the blade 5 along the circumferential direction, that is, in a spiral shape. According to this, the string-shaped regulating member 3 is spirally wound and fixed to the first fixing portion 13. In this example, the device 1 is arranged in the longitudinal direction of the bellows 2, that is, in the direction of arrow X1.
Are relatively moved so as to be separated from each other, the string-shaped restricting member 3 is strained, and a strong tension is generated in the restricting member 3. As a result, harmful vibrations of the bellows 2 and the blade 5 can be suppressed. In this example, the regulating member 3 is wound around the entire circumference of the blade 5 in the circumferential direction, and is also wound around the entire length of the blade 5. Therefore, it is advantageous to reduce the directionality of the regulation function of the regulation member 3.

(Example 25) Example 25 is shown in FIG.
Shown in In this example, the blade 5 is fitted to the bellows 2, and the two regulating members 3 in the form of a "skew", that is, an "X" are provided along the circumferential direction on the outer peripheral portion of the blade 5. Is wound and fixed. Also in this example, as described above, when the devices 1 move in the direction of the arrow X1 so as to be separated from each other, the string-like restricting member 3 is strained and the restricting member 3 is pulled.
Strong tension is generated in the. As a result, harmful vibrations of the bellows 2 and the blade 5 can be suppressed. Further, according to this example, the two string-like regulating members 3 are wound in a "plucking shape" and are wound around the entire length of the blade 5. Therefore, it is more advantageous to reduce the directionality of the regulation function by the regulation member 3.

EXAMPLE 26 Example 26 is shown in FIG.
It shows in (B). FIG. 17A is a side view.
(B) is another side view. In this example, one string-shaped regulating member 3 is used, and the valley portion 20c at an appropriate position of the bellows 2 is used.
While forming the ring string-shaped second fixing portion 23, the string-shaped restricting member 3 is stretched in the longitudinal direction. In this example, since the string-shaped restricting member 3 is stretched, harmful vibration accompanying the transverse wave of the bellows 2 can be suppressed. Furthermore, since the regulating member 3 is wound around the valley portion 20c of the bellows 2 in the circumferential direction, it is also advantageous to suppress harmful vibrations associated with longitudinal waves of the bellows 2 in the direction of arrow X1.

(Embodiment 27) Embodiment 27 is shown in FIG.
Shown in In this example, one string-shaped regulating member 3 is used,
A string-shaped regulating member 3 is wound around the valley portion 20c at an appropriate position of the bellows 2 in the circumferential direction. In this example, since the regulating member 3 is arranged along the circumferential direction in the valley portion 20c at an appropriate position of the bellows 2, it is advantageous to effectively suppress the harmful vibration accompanied by the longitudinal wave of the bellows 2 which faces the arrow X1 direction. Is.

Example 28 Example 28 is shown in FIG.
Shown in In this example, one string-shaped regulating member 3 is used,
Each of the valley portions 20c of the bellows 2 has a string-shaped restricting member 3 continuously wound in the circumferential direction. Also in this example, since the regulating member 3 is arranged along each of the valleys 20c of the bellows 2 along the circumferential direction, it is advantageous to effectively suppress the harmful vibration accompanied by the longitudinal wave of the bellows 2 oriented in the direction of the arrow X1. is there.

Further, as can be understood from FIG. 18B, the restricting member 3 has a smaller cross-sectional area than the space of the valley portion 20c of the bellows 2. That is, the structure is such that the string-shaped regulating member 3 does not fill the entire space of one valley portion 20c of the bellows 2. Therefore, in the valley portion 20c of the bellows 2, the deformation allowance gap 2 is provided around the regulating member 3.
w is formed. Therefore, even if the wall of the bellows 2 vibrates, especially if vibrations accompanied by longitudinal waves occur,
The deformation allowance gap 2w allows the deformability of the string-shaped regulating member 3 and the wall of the bellows 2. Therefore, it is advantageous to suppress local stress concentration on the wall of the bellows 2.

(Embodiment 29) Embodiment 29 is shown in FIGS. Also in this example, one string-like restricting member 3 is used, and the string-like restricting member 3 is wound around each of the valleys 20c of the bellows 2 in the circumferential direction. According to this example,
As can be understood from FIG. 19, the cross-sectional area of the regulating member 3 is smaller than the cross-sectional area of the space of the valley portion 20c of the bellows 2. That is, the structure is such that the string-shaped regulating member 3 does not fill the entire space of one valley portion 20c of the bellows 2. Therefore, in the valley portion 20c of the bellows 2, a deformation permitting gap 2w is formed around the regulating member 3. Therefore, even if the wall of the bellows 2 vibrates, especially if vibration accompanied by a longitudinal wave occurs, the deformability allowance gap 2w allows the deformability of the string-shaped regulating member 3 and the wall of the bellows 2. Therefore, it is advantageous to suppress local stress concentration on the wall of the bellows 2.

Further, according to this example, since the cord material serving as the regulating member 3 is wound around each valley portion 20c of the bellows 2,
This is effective in suppressing harmful vibrations associated with longitudinal waves of the bellows 2 that face in the direction of arrow X1. (Embodiment 30) Embodiment 30 is shown in FIG. This example has basically the same configuration as the example shown in FIG. Also in this example, one string-shaped first restricting member 3 is used, and the string-shaped first restricting member 3 is wound around each of the valleys 20c of the bellows 2. According to this example, similarly to the above, as can be understood from FIG. 21, the entire space of the valley portion 20c of the bellows 2 is not filled with the string-shaped first restricting member 3. That is, the deformation allowable gap 2w is formed around the first restricting member 3 in the valley portion 20c of the bellows 2. Therefore, even if the wall of the bellows 2 vibrates, the deformability allowance gap 2w allows the deformability of the string-shaped first restricting member 3 and the wall of the bellows 2. Therefore, it is advantageous to suppress local excessive stress concentration on the wall of the bellows 2.

Further, according to this example, on the outer peripheral portion of the bellows 2, the second regulating member 32 made of a cylindrical tubular material is formed.
Are fitted and held coaxially. Second regulating member 3
2 is a heat insulating material 3n made of metal foil or the like having heat insulating properties
And a net material 3m are laminated by an appropriate number of layers.
The peak portion 20 a of the bellows 2 faces the inner peripheral surface of the regulating member 3. Further, a ring-shaped restraining member 70 having a ring shape that makes at least one round in the circumferential direction of the bellows 2 is provided on the outer peripheral portion of the restricting member 3. This improves the holding property of the restriction member 3, which is advantageous in suppressing the transverse wave vibration of the bellows 2 in the arrow Y1 direction. According to this example, since the second restricting member 32 is in face-to-face contact with the peak portion 20a of the bellows 2, it is also advantageous for suppressing longitudinal wave vibration of the bellows 2 in the arrow X1 direction.

(Embodiment 31) Embodiment 31 is shown in FIG. In this example, the first blade 5 is fitted on the outer peripheral portion of the bellows 2. The end portion 5s of the first blade 5 is connected to the connection tube 10 of the device 1 by the ring-shaped first fixing portion 13. Further, a cylindrical second portion is formed on the outer peripheral portion of the first blade 5.
The regulation member 32 is fitted. In this example, as can be understood from FIG. 22, the second restricting member 32 is composed of a cylindrical blade.

Further, a frame-shaped third restricting member 33 is arranged outside the second restricting member 32. Third restriction member 33
Is relatively rigid and may be made of metal or hard resin. A fixed cylinder 38 is formed on the third restriction member 33. The fixed cylinder 38 connects the connection cylinder 10 of the device 1 to the gap 10
It is coaxially surrounded by w. Both ends 32s of the second restriction member 32 are fastened and connected to the fixed cylinder 38 of the third restriction member 33 by a ring-shaped fastening member 70. The fastening member 70 may be formed of a metal ring or a string material. According to this example, since tension is applied to the second regulating member 32 formed of the cylindrical blade in the longitudinal direction thereof, that is, in the direction of the arrow X1, it is advantageous to suppress the transverse wave vibration of the bellows 2. is there. Further, as can be understood from FIG. 22, since the inner wall surface of the second regulating member 32 is in face-to-face contact with the outer peripheral portion of the blade 5, it is advantageous to suppress the longitudinal wave vibration of the blade 5 and thus the bellows 2.

(Embodiment 32) Embodiment 32 is shown in FIG. This example is similar to the example shown in FIG. That is, the cylindrical first blade 5 is fitted to the outer peripheral portion of the bellows 2. The longitudinal end portion 5s of the first blade 5 is connected to the connection tube 10 of the device 1 by the first fixing portion 13.

Further, in the device 1, a connecting cylinder 17 is coaxially formed on the outer peripheral side of the connecting cylinder 10 with a gap 10w therebetween. The second restricting member 32 is composed of a cylindrical blade. Both ends 32s of the second restricting member 32 are connected to the connecting cylinder 17 of the device 1 by a ring-shaped fastening member 70. The fastening member 70 may be formed of a metal ring or a string material. According to this example, since tension is applied to the second regulating member 32 formed of the cylindrical blade in the longitudinal direction thereof, that is, in the direction of the arrow X1, it is advantageous to suppress the transverse wave vibration of the bellows 2. is there. Further, as can be seen from FIG. 23, the blade 5
Since the inner wall surface of the second restricting member 32 is in face-to-face contact with the outer peripheral portion of, the longitudinal wave vibration of the blade 5 and thus the bellows 2 is also suppressed.

(Embodiment 33) Embodiment 33 is shown in FIG. This example has basically the same configuration as the example shown in FIG. However, the bellows 2 is in a bent state. Application Example 1 FIG. 25 shows an application example 1. According to this example, a tank 80 as a device and a superconducting magnet container 81 are arranged. Liquid helium 80h is stored in the tank 80. The superconducting magnet 8 is placed in the superconducting magnet container 81.
2 are arranged. Tank 80 and superconducting magnet container 81
Is connected to the superconducting magnet container 8 through the bellows 2 and the liquefied helium 80h in the tank 80 is connected via the bellows 2.
1 and the superconducting magnet 82 is maintained at a cryogenic temperature. A string-shaped regulating member 3 is wound around the valley portion 20c of the bellows 2 in the circumferential direction. Further, a second restricting member 32 made of a tubular material is fitted on the outer peripheral portion of the bellows 2 to restrict harmful vibration of the bellows 2.

Application Example 2 FIG. 26 shows an application example 2. This example also has basically the same configuration as that of Example 1, and uses the bellows 2 (2A to 2D) adopted in Example 1. In this example as well, basically the same action and effect can be obtained.
Hereinafter, the different parts will be mainly described. This example is an example applied to a refrigerator for generating cryogenic temperature to obtain refrigeration of liquid helium temperature, that is, cryogenic temperature (about 10 to 20 K).

This refrigerator is a cold storage type refrigerator (for example,
Gifode McMahon refrigerator, Solvay refrigerator, etc., and a compression unit 10 having a built-in compressor for compressing a refrigerant.
0, and the low temperature generation part 200 which produces | generates a cryogenic temperature with a refrigerant. The compression unit 100 is composed of a first compression unit 101 and a second compression unit 102. The low temperature generation unit 200 generates a very low temperature (for example, about 40 K, but is not limited to this), a first low temperature generation unit 201, and a first low temperature generation unit 201.
The second low temperature generating unit 202 is configured to generate an extremely low temperature lower than the low temperature generating unit 201 (for example, about 5 to 20K, but not limited to this).

As can be seen from FIG. 26, the first compression unit 1
01 is a high pressure outlet 101h and a low pressure inlet 101 above it.
i. The second compression section 102 is also the high pressure outlet 102.
and a low pressure inlet 102i above the h. As can be understood from FIG. 26, the first low temperature generation unit 201 includes a high pressure inlet 201h and a low pressure outlet 201i above it. The second low temperature generator 202 has a high pressure inlet 202h,
A low pressure outlet 202i is provided above it.

As can be understood from FIG. 26, the high pressure inlet 201h and the high pressure outlet 101h using the bellows 2A.
And are connected in an airtight state. Similarly, the low pressure outlet 201i and the low pressure inlet 101i are connected in an airtight state by utilizing the bellows 2B. Similarly, the high pressure inlet 202h and the high pressure outlet 102h are connected in an airtight state using the bellows 2C. Similarly, using the bellows 2D, the low pressure inlet 102
i and the low pressure outlet 202i are connected in an airtight state.

In this example, the high-pressure (pressure: 10 to 20 ata) gaseous refrigerant (helium) compressed in the first compression section 101 passes through the high-pressure outlet 101h, the bellows 2A, and the high-pressure inlet 201h, and the first low temperature It reaches the cylinder chamber of the expansion cylinder 203 of the generation unit 201 and is expanded by the operation of a piston (not shown) to generate a low temperature.
After passing through the bellows 2B and the low pressure inlet 101i, it returns to the first compression unit 101, is compressed to a high pressure state again in the first compression unit 101, and is discharged again from the high pressure outlet 101h. This is repeated, and the expansion cylinder 203 generates a low temperature.

The high-pressure (pressure: 10 to 20 ata) gaseous refrigerant (helium) compressed by the second compression section 102.
Is high pressure outlet 102h, bellows 2C, high pressure inlet 202
h, the heat exchanger 301, the expansion cylinder 2
It reaches the heat exchanger 302 on the 03 side, is cooled there, further passes through the heat exchanger 303, passes through the heat exchanger 304 cooled by the expansion cylinder 203, is cooled there, and passes through the heat exchanger 305. Then, it passes through the Joule-Thomson valve 306, reaches the heat exchanger 307, and further heat exchanger 308.
Through 310 in order, low pressure outlet 202i, bellows 2
D, passes through the low pressure inlet 102i, returns to the second compression unit 102, is compressed to a high pressure state again in the second compression unit 102, and is discharged again from the high pressure outlet 102h. This is repeated. As a result, an extremely low temperature is generated in the heat exchanger 307 of the low temperature generation unit 200.

Also in this example, the string-like regulating member 3 is stretched along the longitudinal direction of the blade 5 fitted to the bellows 2A to 2D. As can be understood from FIG. 26, the low temperature generation unit 200 is mounted on the first underframe 210, and the first underframe 210 is elastically supported by the base 230 via the first elastic supporter 211 such as a spring. . Similarly, the compression unit 100 is also mounted on the second underframe 220, and the second underframe 220 is also elastically supported by the base 230 via an elastic supporter 221 such as a spring.

Therefore, when the base 230 vibrates or moves frequently, the first underframe 210 and the second underframe 220 frequently move relative to each other, and the bellows 2 undergoes relative vibration accompanied by longitudinal and transverse waves. easy. In this respect, according to this example, since the string-like regulating member 3 is stretched along the longitudinal direction of the blade 5 fitted to the bellows 2A to 2D as described above, the bellows 2
The harmful vibrations of (2A to 2D) can be regulated.

In this example, both the first underframe 210 and the second underframe 220 are mounted on the base 230 via the elastic supports 211, 221, respectively, but the first underframe 210,
Either one of the second underframes 220 may be directly fixed to the base 230. (Other Examples) In addition, the present invention is not limited to the embodiments described above and shown in the drawings. For example, the flexible tube is not limited to the refrigerator, but can be applied to other devices such as vehicles. ,
It can be appropriately selected as needed within a range not departing from the gist.

[0082]

According to the first aspect of the present invention, even if the devices vibrate relative to each other so as to be separated from each other, and thereby the harmful displacement of the flexible tube is about to occur, particularly the harmful vibration accompanied by the transverse wave is generated in the flexible tube. Even if an attempt is made, the tension of the regulation member stretched in the longitudinal direction of the flexible tube is increased and the degree of the tension is increased. Therefore, the restricting member restricts harmful displacement such as harmful vibration of the flexible tube. Therefore, it is advantageous for increasing the durability and life of the flexible tube.

According to the second aspect of the present invention, even if the devices vibrate relative to each other so as to be separated from each other, and thereby the harmful displacement of the flexible tube occurs, the harmful vibration particularly accompanied by the longitudinal wave will occur in the flexible tube. Even in this case, harmful vibrations such as harmful vibrations of the flexible tube are restricted by the restricting member arranged along the circumferential direction of the flexible tube. Therefore, it is advantageous for increasing the durability and life of the flexible tube. Particularly, according to claim 2, since the cross-sectional area of the regulating member is smaller than the cross-sectional area of the space of the valley portion of the flexible tube, a gap is formed between the wall surface of the valley portion and the outer surface of the regulating member. Since this gap can function as a deformation allowance space of the flexible tube, it is advantageous to reduce or avoid local excessive stress concentration when the flexible tube is displaced.

Of course, also in the following claims, harmful displacement such as harmful vibration of the flexible tube is suppressed, which is advantageous for durability and long life of the flexible tube. According to claim 3, harmful displacement such as harmful vibration of the bellows is suppressed, and the above-mentioned effect is obtained,
It is advantageous for durability and long life of bellows. According to claim 4, since the regulation member is constituted by at least one of a string material, a rod material, a band material, a film material, a tubular material, a woven material and a net material, the regulation member is regulated according to the type of the flexible pipe. The type of member can be selected.

According to the fifth aspect, since the restriction member is restricted by the ring-shaped restriction member, it is advantageous to ensure the restriction function of the restriction member. According to claims 6 to 8, it is advantageous to secure the holding property of the regulating member. Therefore, it is advantageous to ensure the regulation function of the regulation member for a long period of time.
According to the ninth aspect, since the buffer member is arranged between the flexible tube and the regulating member, it is more advantageous to suppress the harmful vibration of the flexible tube by the buffer function of the buffer member.

According to the tenth aspect, the restricting member is a rod-shaped member extending in the longitudinal direction of the flexible tube and is arranged so as to be relatively movable in the longitudinal direction of the flexible tube. The restriction member can cope with relative movement in the longitudinal direction. According to the twelfth aspect, since the mesh has a triangular shape, it is easy to obtain a truss structure that can contribute to ensuring strength, which is advantageous in suppressing harmful displacement such as harmful vibration of the flexible tube.

According to the thirteenth aspect, the restricting member is composed of a string material having a mesh structure with mesh holes, and the string material in the mesh area is slidable with respect to the mesh, so that the restricting member is used. Excessive restraint can be suppressed. Therefore, it is advantageous to suppress excessive regulation of the flexible tube by the regulation member. According to claim 14, since the tension is applied to the regulation member in the longitudinal direction, the tension of the regulation member is easily secured in the longitudinal direction, and the regulation function for regulating the flexible tube by the regulation member is further improved. Get it. Further, it is advantageous to change the natural frequency of the flexible tube to separate the natural frequency of the flexible tube from the normal vibration region, and it is possible to contribute to suppressing the induction of the natural vibration that is violent. Even in this sense, the durability of the flexible tube,
It is advantageous for extending the service life.

[Brief description of the drawings]

FIG. 1 is a side view of a first embodiment and a second embodiment.

FIG. 2 is a side view of another embodiment.

FIG. 3 is a side view of another embodiment.

FIG. 4 is a side view of another embodiment.

FIG. 5 is a side view of another embodiment.

FIG. 6 is a side view showing another example together with a vibration mode.

FIG. 7 is a side view of another embodiment.

FIG. 8 is a side view of another embodiment.

FIG. 9 is a side view of another embodiment.

FIG. 10 is a side view showing a partial cross section of another embodiment.

FIG. 11 is a cross-sectional view of another example.

FIG. 12 is a side view of another embodiment.

FIG. 13 is a side view of another embodiment.

FIG. 14 is a side view of another embodiment.

FIG. 15 is a side view of another embodiment.

FIG. 16 is a side view of another embodiment.

FIG. 17 is a side view of another embodiment.

FIG. 18 is a side view of another embodiment.

FIG. 19 is a cross-sectional view of another example.

20 is a side view of a main part according to the example of FIG.

FIG. 21 is a cross-sectional view of another example.

FIG. 22 is a side view of another embodiment.

FIG. 23 is a side view of another embodiment.

FIG. 24 is a side view of another embodiment.

FIG. 25 is a sectional view of an application example.

FIG. 26 is a cross-sectional view in another application example.

FIG. 27 is a sectional view of a conventional example.

[Explanation of symbols]

In the figure, 1 is a device, 10 is a connecting tube, 13 is a first fixing portion, and 2
Is a bellows (flexible tube), 20a is a mountain portion, 20c is a valley portion,
Reference numeral 23 is a second fixing portion, 3 is a regulating member, 32 is a second regulating member, 5 is a blade, and 70 is a ring-shaped restraining member.

Front Page Continuation (72) Inventor Hideo Mita 2-1-1 Asahi-cho, Kariya City, Aichi Aisin Seiki Co., Ltd. (72) Inventor Toshiyuki Amano 2-3-3 Marunouchi, Chiyoda-ku, Tokyo Sanryo Electric Co., Ltd. (72) Inventor Seiji Kano 2-3-3 Marunouchi, Chiyoda-ku, Tokyo Sanryo Electric Co., Ltd. (72) In-house Hidenari Akagi 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Sanryo Electric Co., Ltd.

Claims (14)

[Claims] 1. A flexible tube for connecting at least two devices separated from each other, and a disconnection which is arranged along the longitudinal direction of the flexible tube and is smaller than the area defined by the outer diameter of the flexible tube. A flexible pipe having an area and a regulation member having a non-blade structure that regulates the displacement of the flexible pipe. 2. A flexible tube which connects at least two devices which are separated from each other and which is provided with at least one trough, and which is arranged along the circumferential direction in the trough of the flexible tube. A flexible pipe having a cross-sectional area smaller than the space cross-sectional area of the trough portion and a restriction member for restricting the displacement of the flexible tube. 3. The flexible tube according to claim 1, wherein the wall of the flexible tube has a wavy shape in which peaks and valleys are alternately continuous in a longitudinal section along the longitudinal direction. Flexible piping. 4. The restricting member according to claim 1, wherein the restricting member is a string material, a bar material, a band material stretched in the longitudinal direction of the flexible tube,
A flexible pipe comprising at least one of a film material, a tubular material, a woven material, a net material, and a frame body. 5. The flexible pipe according to claim 4, further comprising a ring-shaped restraining member wound around the flexible pipe in a circumferential direction to restrain the restraining member. 6. The device according to any one of claims 1 to 5, wherein each device includes a first fixing portion to which a regulating member can be connected, and an end portion or an intermediate portion in the longitudinal direction of the regulating member is connected to the first fixing portion. Flexible piping characterized in that. 7. The flexible tube according to any one of claims 1 to 6, wherein the flexible tube includes a second fixing portion capable of connecting the regulating member, and the intermediate portion or the end portion of the regulating member is connected to the second fixing portion. Flexible piping characterized in that. 8. The device according to claim 1, wherein each device includes a first fixing portion capable of connecting the regulating member, and the flexible tube includes a second fixing portion capable of connecting the regulating member. The flexible pipe is characterized in that the longitudinal end of the regulating member is connected to the first fixing portion, and the longitudinal intermediate portion of the regulating member is connected to the second fixing portion. 9. The flexible pipe according to claim 1, wherein a cushioning member having a function of suppressing vibration of the flexible tube is arranged between the flexible tube and the regulating member. . 10. The restricting member according to claim 1, wherein the restricting member is a rod-shaped member extending in a longitudinal direction of the flexible tube,
A flexible pipe arranged so as to be relatively movable in the longitudinal direction of the flexible pipe. 11. The flexible pipe according to any one of claims 1 to 10, wherein the regulating member has a net structure having net holes. 12. The flexible pipe according to any one of claims 1 to 10, wherein the regulating member has a mesh structure having mesh holes, and the mesh has a triangular shape. 13. The restricting member according to any one of claims 1 to 10, wherein the restricting member is made of a braided material woven so as to form a mesh structure having mesh holes, and the string material in the mesh area slides on the mesh. Flexible piping characterized by being possible. 14. A flexible pipe according to any one of claims 1 to 13, wherein the regulating member is tensioned in a longitudinal direction thereof.