JPH04203485A - Flexible tube of volume displacement machine - Google Patents

Abstract

PURPOSE:To increase the durability and to prevent an energy loss by providing an elasticity reinforcing material to at least the inner surface bendings of a soft tube of a volume displacement machine which is pressed by the roller on top of a rotor. CONSTITUTION:The high thickness part 4 of a flexible tube 4 made of a soft material such as a rubber in a circular form in the section is made even, and a reinforcing fiber 15 which has no elasticity is buried for reinforcement. An elastic reinforcing material 16 is provided along the inner surface 4a of the tube 4, and its both ends are positioned at the bendings 17 of the tube inner surface 4a, while its both tips 16b are formed in a circular arc form. When the tube-form tube 4 receives a squeezing force from a roller, it is bent at the bendings 17 and made in a flat form in the section. However, since the bendings of the inner surface are contacted close through the elastic reinforcing material 16 in this case, no energy loss is generated, and since the bending corners are regulated by the elastic reinforcing material 16, the durability is increased.

Description

[Detailed Description of the Invention] [Industrial Application Fields] This invention is applicable to bombs, motors, compressors...
This invention relates to flexible tubes for so-called volume displacement machines such as saunas.

[Prior Art] As a volumetric displacement machine, the inventor of the present application previously developed the motive force fi (Patent No. 1990). This prime mover is provided with a cylindrical flexible tube that is installed on the inner surface of a cylindrical case and communicates with a supply port, a rotor is provided in the center of the cylindrical case, and the tube is attached to the tip of the rotor on the inner surface of the cylindrical case. It is equipped with a roller that presses against the surface.

In this prime mover, when compressed air is supplied into the tube from the supply port, the tube presses the roller in the circumferential direction without expanding. Then, the roller moves in the circumferential direction while pressing the tube against the inner surface, and the rotor also rotates in the same direction.

[Problem M to be Solved by the Invention] When the flexible tube of the conventional example is pushed one inch against the inner surface of the cylindrical case by a roller, it is bent at an acute angle from the bent portion and becomes flat. Therefore.

If the bent state and the ridged state of the flexible tube are repeated in sequence, the bent portion is likely to undergo fatigue failure, which poses a problem in the durability of the flexible tube.

Furthermore, since the opposing surfaces do not come into perfect contact with each other at the inner bent portion of the flexible tube, that is, a gap is created, resulting in gas leakage and energy loss.

In view of the above circumstances, the present invention aims to improve the durability of a flexible tube and to prevent A. rugiros.

[! Means for Solving Problem I] This invention provides a cylindrical flexible tube that communicates with a supply port along the inner surface of a cylindrical case, a concentric rotor is provided within the cylindrical case, and the rotor The above-mentioned object is achieved by a flexible tube of a volume displacement machine having a roller at its tip for pressing the tube against the inner surface, wherein an elastic reinforcing material is provided at least at an inner bent portion of the flexible tube. This is what we are trying to achieve.

[For ftE] When the cylindrical flexible tube receives a pressing force directed toward the inner surface of the cylindrical case by a roller, it bends from the bending portion and becomes flat in cross section. At this time, the opposing surfaces of the inner bent portion are completely in close contact with each other via the elastic reinforcing material, and the bending angle of the bent portion is regulated by the elastic reinforcing material.

[Embodiment] A first embodiment of the present invention will be explained with reference to FIGS. 1 to 3.

As shown in FIGS. 1 and 2, the flexible tube 4 is made of a flexible material such as rubber and has a cylindrical cross section, and its thick portion 14 is formed to have a uniform thickness. In the thick portion 14 of the tube 4, reinforcing fibers 15 that do not shrink are embedded for reinforcement. As shown in FIG. 3, the tube 4 is formed in a so-called expanded type, expanding from the supply port 3 toward the discharge port 13. The flexible tube 4 is provided with an elastic reinforcement 16 along its inner surface 4a.

As shown in FIG. 1, this elastic reinforcing material 16 is formed into an arc-shaped body with a uniform wall thickness in cross section, both ends 16a of which are located at the bent portion 17 of the inner surface of the tube 4a, and the tip 16b of which is shaped like an arc. is formed. As shown in No. 4 [21], the suction port 13a of the flexible tube 4 is fitted into the supply port 3 of the cylindrical case 2 fixed to the base 1, and the injection vibe 5 is connected to the driftwood 2, for example, compressed air G. When , the air G becomes
It enters the first chamber a of the tube 4 from the supply port in the connection direction.

Since this first chamber a is sealed by the roller 7 which is biased eleven times by the preload spring 12, the air G has no escape hole. Therefore, the first chamber a expands and the wall surface of the first chamber a presses the roller 7 in the circumferential direction R, so the roller 7
move in the same direction while sealing the first chamber a. At this time, since the roller 7 moves while rotating, the frictional resistance of the tube 4 is small, so that damage to the tube 4 can be prevented. When this roller rough rotates, rollers 8 to 10
also rotates at the same time.

At this time, since the tube 4 is flared at the end, the body IV of each chamber a to d becomes larger in the order of the first chamber a, the second chamber b, the third chamber C, and the fourth chamber d. The pressures PI to P4 in chambers a to d are the pressure PL in the first chamber a and the pressure P2 in the second chamber a.
, the pressure in the third chamber C P3. The pressure of the fourth chamber decreases in the order of P4, so that a pressure difference p, -p2 occurs between the first chamber a and the second chamber A, and between the second chamber A and the third chamber C. A pressure difference P2-P3 occurs between the third chamber C and the fourth chamber d, and a pressure difference p, -p4 occurs between the third chamber C and the fourth chamber d. Circumferential direction R
pressure is applied to the Therefore, each roller 7 to 10 is
Since the rotor 6 rotates while partitioning the tube 4, the rotor 6 rotates smoothly.

Then, when the roller 7 rotates 90 degrees in the circumferential direction R as described above and moves on the radial line B, the roller 10 moves on the radial line A and seals the first chamber a. And roller 8
moves along the radial line C and the roller 9 comes off the tube 4, so the third chamber C is opened and the compressed air G in the chamber C is discharged into the case 2 from the discharge port 13b.

The roller 7 is rotated 180 degrees in the above manner, and the radius line C
When in the upper position, the roller 8 is removed from the tube and the second chamber is opened.

Therefore, the compressed air G in the second chamber is discharged into the case 2 from the discharge port 13b.

The roller 7 is further rotated by 90 rl according to the above procedure,
When positioned on the radial line, the roller 7 is removed from the tube 4, so that the first chamber a is opened. Therefore, the compressed air G in the first chamber a is discharged into the case 2 from the discharge port 13b.

By repeating such a process, the rotor 6 smoothly rotates, but in this process, the flexible tube 4
The inner surface 2 of the cylindrical case 19 is moved by rollers 7.8.9.
Push to side a and it will be removed by 1 inch. As shown in FIG.
The end portion 16a is bent in an arc shape along the direction b, and the end portion 16a is pressed into close contact with the inner surface 4a of the opposing tube 4. Therefore, fatigue failure at the bent portion 17 is prevented and seal leakage does not occur.

The embodiments of the present invention are not limited to the above. For example, the flexible tube 4 may be configured as shown in FIGS. 5 to 14. Examples of each figure will be explained below.
The same drawing symbols as in FIGS. 1 to 3 have the same names and functions.

5f2 and 6th [2] are diagrams showing the second embodiment, and circular hollow portions 27 are provided at both ends 26a of the elastic reinforcing member 26 having an arcuate cross section.
is formed, and its tip 26b is formed in a semicircular cross section. When the elastic reinforcing material 26 is formed in this way, its tip 26a is soft and easily crushed, so when the tube 4 is folded to have a flat cross section as shown in FIG. Music section 1
7. Gas and liquid leakage spaces that are likely to occur are more completely sealed. Therefore, leakage of gas etc. from the bent portion 17 is completely prevented. As shown in the third embodiment shown in FIG. 7 and FIG.
7, and the tips 3 of both ends 36a of the elastic reinforcing member 36
6b may be formed into a semicircular shape. When the flexible tube is folded, the elastic reinforcing member 36 has a flat plate-like cross section as shown in FIG. 8, and a compressed cavity 37 is located in the center thereof. .

9 and 10 are diagrams showing a fourth embodiment, in which a plate spring 47 is embedded in an elastic reinforcing member 46 formed in an arcuate cross-section along almost its entire length, and a plate spring 47 is embedded at both ends 46a of the elastic reinforcing member 46. The tip 46b is formed to have a semicircular cross section. When the flexible tube 4 is folded, the elastic reinforcing member 46 has a flat plate shape in cross section as shown in FIG. Even if the pressure inside the flexible tube 4 becomes lower than the atmospheric pressure, the leaf spring 47 prevents the tube 4 from being compressed when the tube 4 is not compressed by the rollers.
There is a function to return it to a fully open state. Therefore,
If this leaf spring 47 is provided, this v1f1i can be used for a liquid suction pump, a gas vacuum pump, etc.

11121 and 12 are diagrams showing the fifth embodiment, in which an elastic reinforcing member 56 with a circular cross section is provided at the bending part 17 of the inner surface 4a of the flexible tube 4, and the tube 4 is folded by a roller by the amount When twisted, the elastic reinforcing material 56 as shown in FIG.
is deformed into an elliptical shape, and the inner surface 4a of the upper half and the inner surface 4a of the lower half of the tube 4 are in close contact with each other.

1'3112I, FIG. 14 is a diagram showing the sixth embodiment,
An elastic reinforcing member 76 having a circular cylindrical cross section is provided on the inner surface 4a of the tube 4 having a cylindrical cross section.
A protrusion 77 is provided on the inner surface. When this tube is folded by the roller, the elastic reinforcement 76
It is bent from 7 to form a flat plate as shown in Fig. 14. Forming the elastic reinforcement 77 in this manner simplifies its manufacture and installation.

[Effects of the Invention] Since the present invention is configured as described above, when the flexible tube is bent from the bending part by the pressure of the roller, the bending angle is regulated by the elastic reinforcing material, and the elastic reinforcing material is not pressed. It deforms while expanding toward the inner surface of the tube. Therefore, unlike conventional examples, the bent part on the inner surface of the tube does not bend at an acute angle, and air wood, etc. does not leak from the bent part. Therefore, the durability of the tube is improved and A. Rugi loss can be prevented3.

[Brief Description of the Drawings] Figures 1 to 14 are diagrams showing embodiments of the present invention.
The figure shows the first embodiment, and is 1-I! of FIG. I is an enlarged cross-sectional view, FIG. 2 is a cross-sectional plan view showing another state of FIG. 1, and FIG.
Figure 1rA is a plan view of the flexible tube in Figure 2, Figure 4 is a sectional view showing the second embodiment and corresponds to Figure 1, Figure 5
(2I is a sectional view showing the state of the pond in Figure 4, Figure 6 is a cross-sectional view of the pond in Figure 3.
FIG. 2 is a longitudinal sectional view showing an embodiment and corresponds to FIG. 1; FIG. 7 is a sectional view showing another state of FIG. 6, and FIG.
A vertical cross-sectional view showing an example of an actual hammer.
The figure shows the cross section of the pond in Figure 7, and No. 912I is the 5th section.
Vertical cross-sectional views showing the embodiments are shown in Fig. 1 and Fig. 10.
The figure is a sectional view showing the condition of the pond in Fig. 1, No. 1112I is a longitudinal sectional view showing the sixth embodiment and corresponds to Fig. 1, and No. 1112I is a longitudinal sectional view showing the sixth embodiment.
The figure is a sectional view showing the state of use of the 11th and 21st ponds, and the 13th
The figure is a longitudinal cross-sectional view showing the seventh embodiment, and is a view corresponding to the first (21), and FIG. 14 is a cross-sectional view showing how the pond in FIG. 13 is used. 3 ..... Supply port 6 ..... Rotor 7 ..... Roller 8 ..... Roller 9 ..... Roller 10 ..... Roller 13a ...... Inlet port 13b ...... Outlet port 16 ...... Elastic reinforcing material I7 ...... Inner surface bent part

Claims (6)

[Claims] (1) A cylindrical flexible tube communicating with the supply port is provided along the inner surface of a cylindrical case, a concentric rotor is provided within the cylindrical case, and the tip of the rotor presses the tube against the inner surface. 1. A flexible tube for a volume displacement machine equipped with rollers, characterized in that an elastic reinforcing material is provided at least at an inner bent portion of the flexible tube. (2) A cylindrical flexible tube communicating with the supply port is provided along the inner surface of the cylindrical case, a concentric rotor is provided within the cylindrical case, and the tip of the rotor presses the tube against the inner surface. 1. A flexible tube for a volume displacement machine equipped with rollers, characterized in that reinforcing fibers are embedded in the flexible tube, and an elastic reinforcing material is provided at least at an inner bent portion. (3) Volume displacement according to claim 1, characterized in that the elastic reinforcing material is provided with an arcuate cross section along the inner surface of the flexible tube, and both ends thereof are located at the inner bent portion. Mechanical flexible tube. (4) The flexible tube for a volume displacement machine according to claim 3, wherein both ends of the elastic reinforcing member are provided with a cavity. (5) The flexible tube for a volume displacement machine according to claim 3, wherein the elastic reinforcing material has a hollow portion in its center. (6) The flexible tube for a volume displacement machine according to claim 3, wherein a leaf spring is embedded in the elastic reinforcing material.