JP2591664Y2 - Telescopic plumbing pipe - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telescopic piping pipe, and more particularly to a telescopic piping pipe used for connecting a plunger cylinder of a bottle making machine and two relatively moving parts. About.

[0002]

2. Description of the Related Art When manufacturing various bottles having different heights and diameters, a thin stainless steel welded pipe is formed into a corrugated pipe for plunger (PL) cylinders constituting a bottle making machine. A plurality of flexible tubes, each of which is covered with a stainless steel blade on the outside, are used in a state of being housed in a case.

[0003]

The plurality of flexible tubes housed in the case also move laterally due to the fluctuation of the internal air pressure and strike each other. Damage had been caused. In addition, even if the conventional flexible tube has a crack in the bent portion of the thin stainless steel tube, the outside is covered with the stainless steel blade, so the discovery of the crack is delayed and the crack location must be specified. Was difficult.

Further, since the outside of a thin stainless steel tube is covered with a blade, a large force is required to bend the tube. For this reason, a large force is required to move the PL cylinder in the vertical direction, and it takes a long time to adjust the PL cylinder, and it is not possible to shorten the time for changing the mold of the bottle making machine. In addition, the flexible tube has an inner surface that is not smooth and an outer surface covered with a stainless steel blade, and the inner diameter is smaller than the same outer diameter. Thus, the pressure required to operate the fluid had to be increased. If the inner diameter is to be increased, the outer diameter of the flexible tube is increased, so that the cost is relatively high, the handling is troublesome, and the case for accommodating the flexible tube must be increased.

[0005] The present invention has been made in view of these circumstances, has a larger expansion and contraction rate than conventional flexible tubes, is less likely to be damaged, and has a smooth and quick movement during expansion and contraction. Without damaging the telescopic tube,
It is an object of the present invention to provide an extendable piping pipe capable of reducing the loss of fluid pressure during operation and improving the productivity of a bottle making machine and the like.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above-mentioned object, and is applicable to both left and right sides of a reference pipe (1).
A moving tube (2) is inserted, and a connecting tube is provided outside the movable tube (2).
A telescopic piping pipe obtained by further interpolating (3).
Thus, the left and right ends of the reference pipe (1) are radially outward.
The first protruding portion (1b), which becomes thicker, is formed in a ring shape.
A first stopper is provided on the inner peripheral surface of the first protrusion (1b).
(4) is detachably attached to the movable pipe (2).
The second protruding part which becomes thicker radially outward at the inner end of
(2a) is formed in a ring shape, and the second projection (2
a) sealing the circumferential groove formed on the outer peripheral surface
(5) is attached, and at the outer end of the movable tube (2),
The third protruding part (2c), which is thicker radially outward, is a ring
And a second protruding portion (2c) on the outer peripheral surface thereof.
While the stopper (6) is detachably attached,
A third stopper (7) is provided on the inner peripheral surface of the outer end of the moving tube (2).
Is detachably mounted on the inside of the connection pipe (3).
A fourth protruding portion (3a) protruding outward in the radial direction is provided at the end.
Are formed in a ring shape, and the outer periphery of the fourth projecting portion (3a) is formed.
The second sealing (8) is attached to the circumferential groove formed on the surface.
In addition, another member (9) is attached to the outer end of the coupling pipe (3).
Is provided, and said second sealing is provided.
(8) While is brought into contact with the inner peripheral surface of the friendly Dokan (2),
The fourth protrusion (3a) is connected to the third stopper (7).
Locked to prevent further withdrawal of the connecting tube (3).
Is stopped, and the first sealing (5) is connected to the reference pipe (1).
While the second protruding portion (2a) is
The movable pipe is locked by the first stopper (4).
Further withdrawal of (2) is prevented, and the second storage
The par (6) comes into contact with the end face of the reference pipe (1),
Further storage of the movable tube (2) is prevented.
ing.

[0007] In the present invention, the left and right sides are the reference pipe.
It means both sides in the axial direction. Also, the inside refers to a movable tube or
The side near the reference pipe in the joint pipe means the outside is the standard
Mean far side from the tube. The present invention, as a basic configuration,
One movable tube is inserted on each side of the reference tube.
One connecting tube is inserted outside each of the moving tubes.
As the moving tube, the diameter gradually decreases as in the invention of claim 2.
A plurality of section members of the same configuration may be configured with. Main idea
The plumbing pipe is preferably a plunger of a bottle making machine
Vertically arranged as in cylinders
However, tensile force acts on the pipe for contraction
And the second sealing (8) slides on the inner peripheral surface of the movable tube.
First, the connecting tube (3) is pulled out. And the coupling tube
The fourth protrusion (3a) of (3) is the third strike of the movable tube (2).
When the movable pipe comes into contact with the upper pipe (7),
And the piping pipe is in an expanded state.

[0008] On the other hand, pressure is applied to the expanded pipe for piping.
When the force in the contraction direction acts, the connecting pipe (3) is moved into the movable pipe.
The member (9) connected to the connecting tube is started to be housed,
The storage is completed in a state of contact with the end of the storage area. Then,
Movable pipe (2) by other members (9) connected to the joint pipe
The movable tube is stored in the reference tube when the end of
The second stopper (6) abuts the end of the reference pipe (1)
In this state, the storage is stopped, and the total length of the piping pipe is the shortest length.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below with reference to the drawings. 1 to 4 show one embodiment of the present invention, stretchable plumbing pipes, a large reference tube 1 of the outermost diameter of a plurality of sets having an outer diameter gradually decrease, for example, soluble
It is mainly constituted by the moving tube 2 and the connecting tube 3 .

The reference tube 1 is formed with a circumferential groove 1a having a constant width on the inner peripheral surface of the opening at both ends.
A ring-shaped stopper 4 such as a C-shaped ring is removably elastically mounted so as to protrude inward from the inner peripheral surface.
Reference numeral 1b denotes a ring-shaped protrusion formed on a portion of the outer peripheral surface corresponding to the circumferential groove 1a of the reference tube 1, and the protrusion 1b serves to reduce the thickness of the reference tube 1.

Movable tubes 2 and 2 whose outer diameters are slightly smaller than the inner diameter of the reference tube 1 are inserted into the openings at both ends of the reference tube 1. The movable tube 2 has a ring-shaped protrusion 2a having a circumferential groove 2b formed on the outer peripheral surface of the distal end portion on the insertion side. The sealing groove 5 that comes into contact with the inner peripheral surface of the reference tube 1 is mounted in the circumferential groove 2b, and airtightness between the reference tube 1 and the movable tube 2 is maintained.

On the other hand, a C-shaped ring which comes into contact with the end face of the reference pipe 1 is provided at a distal end on the opposite side of the movable pipe 2 in a circumferential groove 2d formed in a ring-shaped projection 2c protruding from the outer peripheral surface. A ring-shaped stopper 6 is elastically mounted so as to be detachable. The movable tube 2 further has a stopper 7 having the same configuration as described above elastically mounted in a circumferential groove 2e formed on the inner peripheral surface on the distal end side. The protruding portion 2c to which the stopper 6 on the outer peripheral surface side is attached has a slightly lower height on the distal end side than the reference tube 1 side, so that the outer stopper 6 can be easily attached and detached. Moreover, circumferential groove 2e stopper 7 of the inner peripheral surface side is attached, without the depth of the distal end side have a little shallower than the reference pipe 1 side to reduce the thickness of the distal end side of the movable tube 2, inner The stopper 7 can be easily attached and detached.

[0013] the distal end side of the movable tube 2, the outer diameter is inserted in slightly less binding tube 3 than the inner diameter of the movable tube 2. Coupling pipe 3, the distal end portion outer peripheral surface of the side to be inserted into the movable tube 2, moving
A ring-shaped protrusion 3a is formed which can abut against a stopper 7 on the inner peripheral surface side of the tube 2. A sealing 8 that is in contact with the inner peripheral surface of the movable tube 2 is mounted in a circumferential groove 3b provided in the protrusion 3a. A screw 3c, which is a connecting means, is engraved on the outer peripheral surface of the opposite end of the connecting pipe 3, and both ends of the expandable and contractible piping pipe are connected to the screw 3c.
It is connected to two members which move relatively or change the distance via connecting members 9, 9 such as elbows screwed to c. The connecting means is a screw, a flange,
It may be a bayonet or a coupler.

[0014] In the above embodiment, between the reference pipe 1 and the coupling tube 3 screw 3c is engraved, it has been described a case where one movable tube 2 is telescopically coupled, coupled to a reference tube 1
A plurality of movable tubes having the same configuration as the movable tube 2 and gradually decreasing in outer diameter may be inserted between the tubes. In this case, if the number of movable tubes to be inserted is increased, not only the extendable distance but also the expansion ratio can be increased.

In the case of the configuration of this embodiment, an expanded state (FIG. 1)
When the pressing force to both ends of the piping pipes at the reference) acts, coupling pipe 3 of the minimum diameter, respectively slips at the portion of the sealing 8 in contact with the inner peripheral surface of the movable tube 2 Yes
It is housed in the moving tube 2 and is in the state shown in FIG. In this state, since the connecting member 9 connected to the coupling pipe 3 is in contact with the end face of the movable pipe 2, when a force in the pressing direction is further applied, the movable pipe 2 comes into contact with the inner peripheral surface of the reference pipe 1. contact slips at the portion of the sealing 5, the reference pipe 1 together with the attached tube 3
Moved into. This movement is stopped when the stopper 6 outside the movable tube 2 comes into contact with the end face of the reference tube 1,
The contracted state shown in FIG. 3 is obtained.

When a pulling force is applied to both ends of the pipe for pipe in a contracted state (see FIG. 3), the pipe is connected.
Tubes 3, slips on the inner circumferential surface of the movable pipe 2 at the portion abutting the sealing 8, drawn from the movable tube inside 2 a state shown in FIG. In this state, since the end face of the ring-shaped projection 3a of the connecting pipe 3 is in contact with the stopper 7 inside the movable pipe 2, when a further force in the pulling direction acts, the movable pipe 2 It slips on the inner peripheral surface at the portion of the abutting sealing 5, the reference pipe 1 together with the attached tube 3
Drawn from. The drawer is stopped when the end face of the insertion-side protruding portion 2a of the movable tube 2 comes into contact with the stopper 4 of the reference tube 1, and the drawing state is extended as shown in FIG.

[0017] In plumbing pipe having this configuration, binding telescopic pipes reference tube 1 and the movable tube 2, and a movable tube 2
Since the sliding is performed with the tube 3, the expansion and contraction ratio can be increased as compared with the case of the conventional flexible tube, and the stress applied to the reference tube 1, the movable tube 2, and the connecting tube 3 is reduced, and the tube is hardly damaged. You can do so. Also, since the surface of the pipe for piping is not covered with a blade like a flexible tube, the outer diameter of the pipe can be made smaller in proportion to the inner diameter. Not only can leaks be found early, but also damaged locations can be easily identified.

Further, since the direction of expansion and contraction is determined in the length direction of the reference pipe 1 and no bending stress is applied, the durability is improved and the pipe moves in the horizontal direction even when the pressure of air or the like flowing in the pipe fluctuates. Instead, it is possible to prevent the adjacent pipes from striking each other so as not to damage each other. In addition, the inner surface of the pipe for pipe is smoother than the case of the conventional flexible tube, the pressure loss of the air flowing inside is small, and the expansion and contraction is smooth by sliding,
In addition, since the process is performed promptly, productivity of a bottle making machine or the like to which a pipe for piping is attached can be improved.

[0019]

[Effects of the Invention] The pipe for piping of the present invention has a larger expansion and contraction rate than conventional flexible tubes, is less susceptible to breakage, has a smaller outer diameter, and allows for early detection of air leakage at breakage. It is easy to identify the damaged part. Also,
Since the expansion and contraction are performed in one direction and are not subjected to bending stress, the durability is good and it is possible to prevent the pipes from hitting each other due to pressure fluctuation of air or the like. Besides, the pipe for plumbing is
Since the inner surface is smooth and the expansion and contraction is performed smoothly and promptly by slipping, productivity of a bottle making machine or the like to which a pipe is connected can be improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional side view showing an embodiment of the present invention in an extended state.

FIG. 2 is a cross-sectional side view showing an intermediate state from an extended state to a contracted state.

FIG. 3 is a sectional side view showing a contracted state of the present invention.

FIG. 4 is a sectional side view showing an intermediate state from a contracted state to an extended state.

[Explanation of symbols]

1 reference tube 1b first projecting portion 2 movable tube 2a second projecting portion 2c third protrusion 3 coupled pipe 3a fourth protruding portion 3c coupling means 4 first stopper 5 first sealing 6 second stopper 7 third stopper 8 second Double sealing 9 Other components

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masaru Nakaiso 2-21, Hamamatsubara-cho, Nishinomiya-shi, Hyogo Yamamura Glass Co., Ltd. (56) References Ref. Field surveyed (Int.Cl. ⁶ , DB name) F16L 27/12

Claims (2)

(57) [Scope of request for utility model registration] A movable tube (2) is provided on both left and right sides of a reference tube (1).
And a connecting pipe (3) is added outside the movable pipe (2).
A pipe for expansion and contraction, which is inserted into the pipe, and is provided with a radially outward wall at both left and right ends of the reference pipe (1).
The thick first protrusion (1b) is formed in a ring shape.
The first stopper (4) is provided on the inner peripheral surface of the first protrusion (1b) of
Is detachably mounted, and the inner end of the movable tube (2) is radially outwardly thick.
The second protrusion (2a) is formed in a ring shape.
The first groove is formed in a circumferential groove formed on the outer peripheral surface of the second protrusion (2a).
A ceiling (5) is attached, and the outer end of the movable tube (2) is thickened radially outward.
Is formed in a ring shape.
A second stopper (6) is provided on the outer peripheral surface of the third protrusion (2c).
Outer end of the movable tube (2) while being detachably mounted
The third stopper (7) is detachably attached to the inner peripheral surface of the part.
The connecting pipe (3) has a radially outwardly projecting inner end.
A fourth projecting portion (3a) is formed in a ring shape.
A second groove is formed in a circumferential groove formed on the outer peripheral surface of the four protrusions (3a).
Ring (8) is mounted on the outer end of the connecting pipe (3).
The part is provided with a coupling means (3c) with another member, and the second sealing (8) is provided on the inner peripheral surface of the movable tube (2).
While the fourth protrusion (3a) is in contact with the third
Locked by the stopper (7), the joint pipe (3)
Further withdrawal is prevented, and the first sealing (5) is connected to the inner peripheral surface of the reference pipe (1).
While the second protrusion (2a) is in contact with the first
The movable tube (2) is locked by a stopper (4).
Further withdrawal is prevented, and the second stopper (6) is attached to the end face of the reference pipe (1).
Abuts and prevents further storage of said movable tube (2).
Telescopic plumbing pipe characterized by being adapted to 2. The movable tube (2) has a diameter gradually decreasing.
A plurality of members of one configuration are sequentially moved from inside to outside.
2. The device according to claim 1, wherein
Telescopic plumbing pipe.