KR20090006735U - Air Valve of shaft for paper tube fixing - Google Patents

Abstract

The present invention relates to an air valve of the shaft for branch pipe gripping. The present invention provides a nipple having at least a threaded portion formed on an outer circumferential surface thereof, and a shaft hole formed at the center thereof, and inserted into the shaft hole of the nipple, wherein a first through hole is formed at a predetermined depth from one end thereof, Sliding shaft with a ring groove formed on the outer circumferential surface as well as a second through hole toward the outer surface, and spring and elastically installed in the shaft hole of the nipple so that the sliding shaft is pushed in one direction, and the spring and the sliding hole of the nipple In the branch pipe holding air valve consisting of an O-ring installed in the ring groove of the sliding shaft to seal the outer peripheral surface of the shaft, the sliding shaft is provided at the end or the O-ring of the sliding shaft to prevent the departure of the sliding shaft at the source It is characterized by.

Therefore, the present invention can prevent the departure of the sliding shaft at the source by providing an elastic locking piece and the inclined flange, which is a structure for preventing the sliding of the sliding shaft at the end or the O-ring of the sliding shaft, thereby ensuring the safety of the air valve.

Branch pipe gripping shaft, air valve, sliding shaft, separation prevention structure

Description

Air valve of shaft for paper tube fixing

The present invention relates to an axis for seborrheic sebum to grasp the outer lichen tube while the lug protrudes and expands radially by the rubber tube in the pipe, and more particularly, to inject or withdraw air into the rubber tube in the pipe. It relates to an air valve of a branch pipe gripping shaft for opening and closing the flow path.

In general, fabric, paper, film and the like are produced in a rolled manner, which is produced and shipped by winding in pipes such as branch pipes. The paper tube winding the fabric or film is produced by winding a predetermined length by rotating the shaft together with the shaft inserted therein.

The axis for branch pipe gripping related to this technique is presented in Korean Laid-Open Patent Publication No. 2000-0061639, the configuration of which is arranged in a staggered position alternately with a plurality of lug holes in the direction of the center line at equal angles. And a support shaft fixedly coupled to both ends of the pipe. The support shaft is formed with an air inlet in the direction of the center line from the outside, and a connecting member is fitted to the inner end of the air inlet, and an air valve for injecting and extracting air into the air inlet inlet of one of the support shafts is provided. It was closed.

In the conventional branch for holding pipes as described above, the first pipe is inserted into the outside of the pipe, and then the air is injected through the air valve provided at the tip of the air inlet of the support shaft, and then the inside of the rubber tube through the air inlet and the connection member and the tube support pipe of the support shaft. Will be filled with. The rubber tube is expanded by the air pressure filled in the rubber tube, and the rubber tube thus expanded pushes the lugs outward, thereby grasping the inner surface of the branch pipe. At this time, the holding force of the branch pipe is determined by the air pressure inside the rubber tube.

In this state, the axis for the branch pipe gripping according to the present invention is rotated at a constant speed by the driving mechanism, and the fabric is wound on the outer surface of the branch pipe.

In this way, after winding a certain amount of fabric on the outer surface of the branch pipe and removing the branch pipe from the outer surface of the pipe, opening the air valve provided on the support shaft at one end of the pipe opens the air inside the rubber tube to the outside and the air pressure drops rapidly to atmospheric pressure. Becomes the same as As the air pressure decreases as described above, the rubber tube itself contracts due to the restoring force of the rubber tube itself, and at the same time, the spring is also returned to its original position, whereby the lug inserted in the lug hole of the pipe enters and returns toward the center of the pipe, thereby releasing the branch pipe. At this time, when the gripping of the branch pipe is released, the branch pipe on which the fabric is wound is removed.

As shown in FIG. 1 and FIG. 2, the air valve of the branch pipe gripping shaft is nipple (10) having a shaft hole (12) which is fastened to the air inlet of the supporting shaft and has a sliding shaft (20) penetrated at the center thereof. And the shaft hole 12 of the nipple 10 are inserted from one side, and the first through hole 21 is formed to a predetermined depth from one end thereof, and toward the outer peripheral surface at the other end position of the first through hole 21. In addition to the perforated second through hole 22, the sliding shaft 20 having the ring groove 23 formed on the outer circumferential surface thereof is installed in the shaft hole 12 of the nipple 10, but the sliding shaft 20 is always pushed in one direction. I am installed in the spring 30 and the ring groove 23 of the sliding shaft 20 is elastically installed to take the force and the outside of the shaft hole 12 and the sliding shaft 20 of the nipple 10 by the spring 30 The main surface is composed of an O-ring 40 to maintain the hermetic airtight.

The outer peripheral surface of the nipple 10 is formed with a screw portion 13 and a polygonal surface portion 14 and tapered to the O-ring 40 fitted in the ring groove 23 of the sliding shaft 20 at the end of the central shaft hole 12 The inclined surface 17 is formed.

When the air valve of the branch pipe gripping shaft as described above is connected to keep the airtight while the end of the high pressure air hose pushes the sliding shaft 20 forward when air is injected into the rubber tube, the shaft hole 12 of the nipple 10 is connected. And the O-ring 40 sealing the outer circumferential surface of the sliding shaft 20 is spaced apart so that the first and second through holes 21 and 22 of the sliding shaft 20 are opened so that air can be injected into the rubber tube. will be.

After the injection at a suitable pressure in such a state, the high pressure air hose is removed and the force applied to the sliding shaft 20 is removed. As a result, the sliding shaft 20 is retracted by the restoring force of the spring 30 and the shaft hole 12 of the nipple 10 is removed. The O-ring 40 seals the outer circumferential surface of the sliding shaft 20 with the air in the rubber tube.

When the air in the rubber tube is to be removed, the O-ring sealing the shaft hole 12 of the nipple 10 and the outer circumferential surface of the sliding shaft 20 is pushed forward by pushing the sliding shaft 20 of the air valve using a hand tool. Since the first and second through holes 21 and 22 of the sliding shaft 20 are opened while being spaced apart from 40, air in the rubber tube can be extracted.

However, in the conventional air valve as described above, since the nipple 10 and the sliding shaft 20 are all made of copper or copper alloy rods (hexagonal rods or round rods), screwing, drilling, and outer peripheral surface machining are performed. Due to this, there was a problem that the material and processing cost is high and the productivity is low, which is not practical.

In particular, the sliding shaft 20 is connected to the tapered inclined surface formed at the end of the shaft hole 12 of the nipple 10 in a state in which about half of the O-ring 40, which is a circular cross section, is inserted into the ring groove. As the cross section of the 40 is deformed, the cross section of the O-ring 40 is reduced, and thus the sliding shaft 20 may be thrown out without being able to overcome the high air pressure in the rubber tube.

Since the sliding shaft 20 can be bounced at a high speed in this way, the worker is reluctant to work due to anxiety and cannot improve the work efficiency, and the sliding shaft 20 is bounced off during the operation and the worker is hit by a serious injury. There was a problem of wearing.

In order to solve the conventional closed ends and problems as described above, the purpose is to prevent the departure of the sliding shaft by providing an elastic catching piece and an inclined flange, which is a structure of preventing the sliding shaft from the sliding shaft at the end or the O-ring. It is possible to provide an air valve for the branch pipe gripping shaft to ensure the safety of the air valve.

Another object of the present invention is to provide a nipple made of a resin, but between the threaded portion and the hexagonal portion of the outside of the neck and the plate portion and the o-ring provided in the neck by tightening the screw portion of the nipple smooth in the air inlet of the support shaft made of metal This is to provide an air valve for the shaft of the branch pipe gripping so as to ensure the airtight simply by fastening to the air inlet.

In order to achieve the above object, the present invention has a nipple having a screw portion formed on at least an outer circumferential surface thereof, and a shaft hole formed at the center thereof, and inserted into the shaft hole of the nipple, and a first through hole is formed to a predetermined depth from one end thereof, and the first through hole is formed. The second through hole is drilled toward the outer circumferential surface at the other end position of the spring as well as a sliding shaft formed with a ring groove on the outer circumferential surface, and the spring is elastically installed in the shaft hole of the nipple so that the sliding shaft is forced to push in one direction. An air valve for branch pipe gripping composed of an O-ring provided in a ring groove of the sliding shaft to seal the shaft hole of the nipple and the outer circumferential surface of the sliding shaft by a spring, the end of the sliding shaft or the O-ring of the sliding shaft to prevent the deviation of the sliding shaft. Characterized in that the structure is provided to prevent the departure of the sliding shaft.

In the air valve for branch pipe gripping according to the present invention, the separation prevention structure is provided with at least two elastic catching pieces at the end of the sliding shaft and at the shaft hole end of the nipple so that the elastic catching piece is caught at the moment when the sliding shaft is separated from the shaft hole of the nipple. It is characterized in that the locking step is formed.

In the air valve of the branch pipe gripping shaft according to the present invention, the separation prevention structure is characterized in that the tapered flange corresponding to the tapered slope of the shaft hole end is provided on the main surface of the O-ring.

In addition, in the air valve of the branch pipe gripping shaft according to the present invention, between the screw portion and the multi-faceted portion of the nipple further provides a flat plate and a neck to further ensure air tightness when fastened with the air inlet and the neck 2 O-ring is preferred.

The air valve of the branch pipe gripping shaft according to the present invention is provided with an elastic locking piece and an inclined flange, which prevent the sliding shaft from falling off at the end of the sliding shaft or the O-ring, so that the sliding shaft is deviated from the sliding shaft when the O-ring is deformed. This prevents the deviation of the sliding shaft at the source, thereby ensuring the safety of the air valve.

In addition, the present invention is to provide a nipple made of a resin, but the neck and the plate between the screw portion and the hexagonal portion of the outer side and the O-ring provided in the neck by screwing the screw portion of the nipple smooth in the air inlet of the support shaft made of metal As long as it is fastened to the air inlet like this, there is an effect that the confidentiality is achieved.

Hereinafter, the air valve of the branch pipe gripping shaft according to the present invention will be described in detail with reference to the accompanying drawings.

3 is a partial k view showing an axis for gripping gland to which the air valve according to the present invention is applied, Figure 4 is a perspective view showing an extract of the air valve of the gland gripping shaft that is the main part of the present invention in Figure 3, Figure 5 is 6 is a cross-sectional view of another embodiment showing an air valve of a branch pipe gripping shaft according to the present invention.

As shown in the figure, the axis for the branch pipe gripping to which the air valve of the present invention is applied is a pipe (p) in which a plurality of lug holes are alternately arranged in an alternately staggered position at equal angles, and the pipe (p) A support shaft (s) coupled to both ends of each of the < RTI ID = 0.0 >), < / RTI > And a connection member (c) inserted and fixed to the inner end of the air inlet (h), a rubber tube (t) fixed to hold the airtight outside the connection member (c), and an outer side of the rubber tube (t). It is composed of several lugs (1) which are installed at and moved radially of the pipe (p) as the rubber tube (t) expands.

The air valve v, which is the main part of the present invention, has a nipple 10a having a screw portion 13 and a polygonal surface portion 14 formed on at least an outer circumferential surface thereof and a shaft hole 12 formed at the center thereof, and a shaft hole 12 of the nipple 10a. The first through hole 21 is formed in a predetermined depth from one end and the second through hole 22 is drilled toward the outer circumferential surface at the other end position of the first through hole 21, as well as a ring groove on the outer circumferential surface. The spring 30 and the spring 30 which are elastically installed in the shaft hole 12 of the nipple 10a so that the sliding shaft 20a in which the 23 is formed, and the sliding shaft 20a pushes in one direction is applied. It is composed of an O-ring 40 is installed in the ring groove 23 of the sliding shaft 20a to seal the shaft hole 12 of the nipple (10a) and the outer peripheral surface of the sliding shaft (20a).

A flat plate portion 15 and a neck portion 16 are formed between the screw portion 13 and the polygonal surface portion 14 of the nipple 10a, and a second O-ring 42 is fitted to the neck portion 16. At the end of (12), a tapered slope 17 is formed.

An end of the sliding shaft 20a or the O-ring 40 is provided with a sliding prevention structure of the sliding shaft to prevent the departure of the sliding shaft 20a at the source. The separation preventing structure is provided with at least two elastic locking pieces 24 at the ends of the sliding shaft 20a and the elastic locking pieces 24 when the sliding shaft 20a is separated from the shaft hole 12 of the nipple 10a. Hanging step (18) is formed at the end of the shaft hole 12 of the nipple (10a) to be caught.

The air valve of the branch pipe gripping shaft configured as described above is applied to the branch pipe gripping shaft, and when the screw 13 of the nipple 10a is fastened to the air inlet h of the support shaft s, the O-ring of the neck 16 (42) and the flat plate portion 15 is fastened to ensure a certain airtight with the air inlet ().

The reason why the nipple 10a is airtightly fastened is that the second o-ring 42 is in close contact with the inner surface of the air inlet h, and at the same time, the flat plate 15 is in close contact with the inlet end of the air inlet h. Confidentiality will be achieved.

As described above, injecting and extracting air into the rubber tube t through the air valve v and then fastening to the support shaft, which is a shaft for branch pipe gripping, is described in the background art of the present application, and thus a detailed description thereof will be omitted.

Therefore, the following description will be described in detail with respect to the separation prevention structure of the sliding shaft (20a) when the sliding shaft (20a) is the main part of the present invention.

The O-ring 40 fitted into the ring groove 23 of the sliding shaft 20a is deformed to weaken the locking step 18 of the tapered slope 17 of the end of the shaft hole 12 of the nipple 10a. In this state, the pressure in the rubber tube and the restoring force of the spring 30 act in the direction of the center line axis of the sliding shaft 20a, so that they can bounce off.

When the sliding shaft 20a is bounced out of the shaft hole 12 of the nipple 10a in this manner, the sliding shaft 20a is attached to the engaging step 18 of the tapered slope 17 formed at the end of the shaft hole 12 of the nipple 10a. ) The engaging elastic piece 24 of the end is caught. Therefore, since the sliding shaft 20a is thrown out of the shaft hole () of the nipple 10a, the deviation of the sliding shaft 20a is prevented at the source, and eventually, the industrial shaft accident is prevented by jumping off the sliding shaft 20a. There is no concern.

6 is a cross-sectional view showing an air valve of a branch pipe gripping shaft according to another embodiment of the present invention. Here, when the O-ring 40 fitted into the ring groove 23 of the sliding shaft 20a on the main surface of the O-ring 40 comes into contact with the tapered slope 17 at the end of the shaft hole 12, the corresponding O-ring 40 is in close contact with the tapered slope 17. The same configuration is provided except that the tapered flange 43 is provided.

The air valve of the branch pipe gripping shaft of the present invention configured as described above has a ring groove of the sliding shaft 20a when the pressure in the rubber tube t and the restoring force of the spring 30 act in the direction of the center line axis of the sliding shaft 20a. 23, the tapered flange 43 of the O-ring 40 is in close contact with the tapered slope 17 at the end of the nipple 10a side shaft hole 12, so that the shaft hole 12 of the nipple 10a is deformed even if the O-ring 40 is deformed. The locking is securely held by the locking end jaw 18 of the tapered inclined surface 17 at the end. Therefore, the sliding shaft 20a can be prevented from escaping from the nipple 10a side shaft hole 12 (that is, jumping off) at the source.

In particular, simply by adding a tapered flange 43 to the O-ring 40, as well as the present invention can be applied to the existing air valve of Figures 1 and 2 as it is.

The present invention can be usefully used for a valve capable of supplying or withdrawing a fluid into a predetermined internal space, for example, a tube or an air valve of a branch pipe gripping shaft.

1 is an exploded perspective view showing an air valve of a conventional branch pipe gripping shaft,

2 is an assembled cross-sectional view of FIG.

Figure 3 is a partial perspective view showing a shaft for branch pipe holding the air valve according to the present invention,

4 is a longitudinal sectional view of FIG. 3;

Figure 5 is a perspective view showing an air valve of the shaft for gripping pipes according to an embodiment of the present invention which is the main part of the present invention in Figures 3 and 4,

6 is a longitudinal sectional view of FIG. 5;

7 is a cross-sectional view showing an air valve of a branch pipe gripping shaft according to another embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

10,10a: nipple 12: shaft ball 13: threaded portion

14: polygon 15: flat plate 16: neck

17: tapered slope 18: engaging step 20, 20a: sliding shaft

21: first hole 22: second hole 23: ring groove

24: elastic engaging piece 30: spring 40: O-ring

42: second o-ring 43: inclined flange c: connecting member

h: Air inlet l: Lug p: Pipe

s: support shaft v: air valve

Claims (4)

A nipple having a threaded portion formed on at least an outer circumferential surface thereof, and having a shaft hole formed at the center thereof, and inserted into the axial hole of the nipple, wherein a first through hole is formed at a predetermined depth from one end thereof, The through hole is drilled, as well as a sliding shaft having a ring groove formed on an outer circumferential surface thereof, a spring elastically installed in the shaft hole of the nipple so that the sliding shaft pushes in one direction, and an outer side of the shaft hole of the nipple and the sliding shaft by the spring. In the branch valve holding air valve consisting of an O-ring installed in the ring groove of the sliding shaft to seal the main surface, Air valve of the branch pipe gripping shaft, characterized in that the prevention of the separation of the sliding shaft is provided at the end or the O-ring of the sliding shaft to prevent the departure of the sliding shaft at the source. The method of claim 1, The detachment preventing structure is provided with at least two elastic locking pieces at the end of the sliding shaft and the engaging step jaw is formed on the shaft hole end of the nipple so that the elastic locking piece is caught at the moment when the sliding shaft is separated from the shaft hole of the nipple. Air valve. The method of claim 1, The separation prevention structure is an air valve of the branch pipe gripping shaft, characterized in that the tapered flange corresponding to the tapered slope of the shaft hole end is provided on the main surface of the O-ring. The method of claim 1, Between the screw portion of the nipple and the multi-faceted portion is further provided with a flat plate and a neck in order to maintain a more secure air tightness when tightened with the air inlet and the second o-ring in the neck of the branch pipe gripping shaft air valve, characterized in that .

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