JPH0239119Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Technical Field of the Invention" The present invention relates to a small-sized gas cylinder mounting device.

“Prior art and its problems” Conventionally, small high-pressure gas cylinders for medical use (e.g.
To attach gas (CO ₂ , O ₂ , N _{2 ,} etc.) to a regulator, etc., there is a method of attaching it by directly screwing a screw part cut into the tip of a gas cylinder to the attachment part. However, with this method, a large amount of force is required to screw the cylinder in, and it is also necessary to grasp the cylinder cylinder and screw it in. Therefore, when storing the cylinder in the case, the cylinder protrudes a certain amount from the case. This had the disadvantage of making the whole structure large.

In order to solve this problem, the present inventors devised a gas cylinder mounting device having the structure shown in FIG. 5 before devising the present invention, and proposed it as Utility Model Application No. 38878/1983.

In FIG. 5, the tip of the cutting needle/air guiding tube part 4 of the regulator 1 projects from the center of the fitting guide opening part 3 provided concentrically at one end of the holding cylinder 2 to which the regulator 1 is attached. be.

A cylinder guide 6 having a peripheral engagement portion 5 at one end is slidably fitted into the holding cylinder 2 with a weak spring 7 interposed between it and the inner end of the holding cylinder 2.
In addition, a female screw portion 9 is provided in the open portion 8 of the holding cylinder 2.

Furthermore, a male screw tube 10 is formed to be screwed into the female screw portion 9, and a small cylinder 11 is attached to the male screw tube 10.
An engagement recess 12 that can be engaged with the rear end is provided, and a wide claw tooth section 15 with a continuous additional tooth having an engagement step is formed on the outer circumferential surface of the end 13. There is.

At the center of the end portion 13 of the male screw tube 10, there is an inner circumferential surface 16 having a larger diameter than the outer diameter of the claw tooth portion 15 of the male screw tube 10.
A small male screw shaft 8 protruding from the center of the rotary operation cap body 17 is screwed into the center of the rotating operation cap body 17, and the front end 18' of the small male screw shaft 18 is centered in the engagement recess 12 of the male screw tube 10. It faces freely forward and backward, and has a small male screw shaft 18.
An annular stopper 19 is fixed near the front end 18'.

Turn this rotary operation cap body 17 to connect the small male screw shaft 18.
When the annular stopper 19 comes into contact with the inner surface of the engagement recess 12, the male threaded tube 10 rotates in unison with the rotation of the rotation operation cap body 17, and the male screw tube 1
0 makes the screw engagement with the male threaded portion 9 of the holding cylinder 2 shallow, and eventually comes out from there.

Further, the rotation operation cap body 17 is provided with a radial fitting hole 21 having an opening 20 in the middle of the inner circumferential surface 16, and inside the fitting hole 21, there is a structure in which the strength can be adjusted. An engaging sphere 23 is provided which is pressed in the axial direction by a small spring 22.

The engaging sphere 23 is a male screw that faces the inner circumferential surface 16 of the rotary operation cap body 17 with a constant gap, with approximately 1/2 or less of the spherical surface protruding from the opening 20 of the fitting hole 21. It is always elastically engaged with one of the engagement step portions of the pawl tooth portion 15 on the continuous toothing of the end portion 13 of the cylinder 10, thereby forming a ratchet mechanism. When the rotational resistance applied to the male screw tube 10 is less than the elastic force of the small spring 22 that presses the engagement sphere 23 during pushing, the engagement that engages with the engagement step part of the pawl tooth section 15 is applied. The male screw tube 10 is locked by the sphere 23 and rotates together with the rotation operation cap body 17, and the rotation resistance applied to the male screw tube 10 presses the engagement sphere 23.
When the elastic force becomes larger than the elastic force of 2, the engagement sphere 23 resists the small spring 22 and overcomes the engagement step, and the male screw tube 10 comes to a halt, and only the rotation operation cap body 17 rotates to perform rotation operation. A small male screw shaft 18 of the cap body 17 threads through the engagement recess 12 of the male screw tube 10.

In addition, by rotating the rotation operation cap body 17 in the opposite direction to the above, that is, in the opposite direction in which the engagement sphere 23 does not engage with the engagement step portion of the pawl tooth portion 15 of the male screw tube 10, First, only the rotation operation cap body 17 rotates, the small male screw shaft 18 screws back, and the annular stopper 19 comes into contact with the inner surface of the engagement recess 12 of the male screw tube 10, and the inner surface of this engagement recess 12 and the annular stopper 19, the male screw tube 10 can be rotated together with the rotary operation cap body 17.

Note that the reference numeral 24 in the drawings represents a gas outlet portion within the regulator gas cylinder 11.

For this purpose, the small cylinder 11 is adapted to the cylinder guide 6 in the holding cylinder 2, the male screw cylinder 10 is screwed into the female screw part 9 of the holding cylinder 2, and the rotary operation cap body 17
When the male screw tube 10 is rotated in the pushing direction, the male screw tube 10 engages the rotary operation cap body 1 via the engagement sphere 23 which is elastically engaged with the engagement step portion of the claw tooth portion 15 by the small spring bar 22.
7, the male screw tube 10 is screwed to the left in the figure, and the engagement recess 12 of the male screw tube 10 first comes into contact with the rear end of the small cylinder 11. In this state, when the rotation operation cap body 17 is further rotated in the pushing direction, the male threaded tube 1 is rotated as the rotation operation cap body 17 is rotated.
0 further spirals to the left to move the small cylinder 11 forward, and the sealing plate 26 closing the front end of the mouth 25 of the small cylinder 11 and the cutting needle of the regulator 1 attached to the holding cylinder 2 are connected. The tip of the air guide tube portion 4 comes into contact with the tip. When the rotary operation cap body 17 is further rotated after contacting the sealing plate 26, the repulsive force from the sealing plate 26 acts on the male screw tube 10, causing the male screw tube 10 and the female screw of the holding tube 2 to The frictional resistance at the threaded part with the part 9 increases, and the rotational resistance applied to the male threaded tube 10 is reduced to the engagement sphere 2.
3 is larger than the elastic force of the small spring 22 pressing down on the small spring 22. Therefore, the engaging sphere 23 overcomes the engagement step part of the pawl tooth part 15 of the male screw tube 10 against the small spring 22, and the male screw tube 10 comes to a stopped state, and from then on, only the rotation operation cap body 17 is moved. The small male screw shaft 18 of the rotary operation cap body 17 that is rotated and screwed into the male screw cylinder 10 screws forward, presses the rear end of the small cylinder 11, and presses the sealing plate 26 of the mouth part 25 of the small cylinder 11. Push it all the way to open it,
The tip of the cutting needle/air guiding tube part 4 of the regulator 1 enters the mouth part 25 of the small cylinder 11, and the small cylinder 11 and the regulator 1 are brought into communication.

Here, since the outer diameter of the rotary operation cap body 17 is larger than the outer diameter of the small male screw shaft 18, it is possible to press the small cylinder 11 successively very easily.

In this way, the small male threaded shaft 18 screwed into the center of the male threaded cylinder 10 is screwed through the large diameter rotary operation cap body 17, and the cut of the regulator 1 is inserted into the sealing plate 26 of the mouth 25 of the small cylinder 11. Since the tip of the needle-cum-trachea tube section 4 is strongly pressurized to push the sealing plate 26 completely, even if a repulsive force from the sealing plate 26 acts, the rotation operation cap body 17 does not exert a force on the small male screw shaft 18. The small male screw shaft 18 can be threaded by lightly turning the rotary operation cap body 17.

However, in the above configuration, when the rotary operation cap body 17 is further rotated after the sealing plate 26 is pushed completely during pushing, the threaded portion is excessively tightened.
When converting the small cylinder 11, a very strong force was required for reverse rotation, which sometimes caused difficulty in attaching and detaching the cylinder. In addition, if the rotation operation cap body 17 is excessively tightened and the rotation operation cap body 17 and the male threaded tube 10 become jammed, when they are separated (originally, the rotation operation cap body 10
After the small male screw shaft 18 of No. 7 rotates relative to the male screw tube 10 and the annular stopper 19 comes into contact with the engagement recess 12 of the male screw tube 10, both 10 and 17 should rotate together. However, both 10 and 17 rotate together from the beginning and separate from the holding cylinder 2. For this reason, it was necessary to use strong force to release the grip of both 10 and 17 after they left. (If the replaced small cylinder 11 is pushed in again with both 10 and 17 stuck together, the meaning of the configuration that enabled the sealing plate 26 to be pushed out with a light force will be lost because both rotate together.) Therefore, a situation may occur in which the opening mechanism of the device is damaged due to excessive tightening of the small cylinder 11.

[Purpose of invention]

The present invention was developed in view of the above-mentioned problems, and its purpose is to make it possible to easily attach a gas cylinder with a small amount of force, to avoid excessively press-fitting the gas cylinder, and to easily dispose of the gas cylinder after use. An object of the present invention is to propose a gas cylinder mounting device that can attach and detach gas cylinders.

[Summary of the invention] The gas cylinder mounting device of the present invention has a mounting part that has a tip needle part that also serves as an air guide pipe part for breaking the sealing plate of the gas cylinder, in the gas cylinder tip fitting guide opening at one end of the holder part that stores the gas cylinder. and, on the other hand,
A male screw tube is provided in the female screw portion disposed in the opening at the other end of the holder portion, and a male screw tube is provided to be screwed thereto, and a small female screw portion is provided approximately in the center of the bottom surface of the male screw tube,
the small female screw portion, and a small male screw shaft rotatably held approximately at the center of the rotary operation cap body having an inner circumferential surface having a larger diameter than the outer diameter of the end of the male screw tube; A gas cylinder mounting device in which the gas cylinders are screwed through each other and the gas cylinder is pressed and mounted by the small male screw shaft,
The rotation operation cap body and the male threaded cylinder are engaged to be able to rotate together at a rotation torque of less than the first rotation torque, and the small male screw shaft and the rotation operation cap body are engaged with each other so as to be able to rotate together at a rotation torque of less than the first rotation torque. This is a small gas cylinder mounting device that engages the gas cylinder so that it can rotate integrally with less than the rotational torque.

[Example of idea]

Hereinafter, the present invention will be explained in detail using drawings showing a preferred embodiment.

FIG. 1 is a sectional view of one embodiment of the present invention.

In the figure, the same components as in FIG. 5 are given the same numbers. The structure of this embodiment is exactly the same as that of the conventional structure except for the male screw tube 10 and the rotary operation cap body 17, and the explanation of these parts will be omitted since they are redundant.

In the male threaded barrel 10 of this embodiment, instead of the conventional claw toothed portion 15, a wide claw gear 14 having an outer circumferential surface similar to that of the clawed toothed portion 15 and having a continuous tooth shape is provided at the end of the male threaded barrel 10. It is fitted and fixed to the outer peripheral surface of the portion 13.

The structure of the male threaded cylinder 10 and the pawl gear 14 will be explained with reference to FIG. 2, which is a sectional view taken along the line A--A in FIG. 1.

Note that the shape of the pawl gear 14 is similar to the pawl tooth portion 15 in the form of a continuous additional tooth provided with an engagement step portion shown in FIG.

As shown in FIG. 2, the pawl gear 14 fitted into the end 13 of the male threaded cylinder 10 and the engagement sphere 23 pressed in the axial direction by the small spring 22 are always resiliently engaged. The rotation operation cap body 17 and the male screw tube 10 operate in the same relationship as described above. Then, when a small male screw shaft 18 (described later) engaged with the rotation operation cap body 17 starts to thread through the engagement recess 12 of the male screw tube 10 while pressing the gas cylinder 11, the pawl gear 14 is engaged. The sphere 23 climbs over the engaging stepped portion 14a, and thereafter the rotation of the male screw tube 10 stops, the engaging sphere 23 successively overcomes the engaging stepped portion, and the small male screw shaft 18 screws forward. .

On the other hand, the rotating operating cap body 17 of this embodiment is different from the rotating cap body shown in FIG.
A gear-shaped engagement step is formed on the outer circumference, and an open radial fitting hole 34 is provided on the inner circumferential surface of the end of the rotation operation cap body 17.
4 is provided with an engaging sphere 36 which is pressed in the axial direction by a small spring 35 whose strength can be adjusted using a push screw 33.

This configuration will be explained below with reference to FIG. 3, which is a sectional view taken along the line B--B in FIG. 1.

The rotation operation cap body 17 includes the rotation operation cap body 1
7, a substantially cup-shaped holding cylinder 31 with a hole in the center of the bottom for rotatably holding the small male screw shaft 18 is fixed with a mounting screw 32, and the small male screw shaft 18 has a large diameter. The rear end portion 30 is rotatably held between the inner bottom surface of the rotary operation cap body 17 and the holding cylinder 31. The engagement sphere 36 is formed on an engagement step provided in the shape of a gear on the rear end portion 30 of the small male screw shaft 18, with approximately 1/2 or less of the spherical surface protruding from the opening of the fitting hole 34. It is always pressed into engagement with one of the portions 38. Then, the rotation resistance applied to this small male screw shaft 18 presses the engagement sphere 36.
When the elastic force becomes larger than the elastic force 5, the engagement sphere 36 overcomes the gear-like engagement step portion 38 of the small male screw shaft 18, the small male screw shaft 18 comes to a halt, and from then on, only the rotation operation cap body 17 rotates idly. do. Therefore, the gas cylinder 11 is not pressed against the regulator 1 with a force greater than the pressing pressure determined by the elastic resistance between the gear-like engagement step portion 38 of the small male screw shaft 18 and the engagement sphere 36. For this reason, gas cylinder 11
Even when the gas cylinder 11 is to be removed after the use of the gas in the cylinder is finished, all that is required is to rotate the rotary operation cap body 17 in the direction of the broken line arrow B in FIG. 2, as described above.
First, the engagement step portion 14a of the pawl gear 14 at the end 13 of the male screw tube 10 and the engagement sphere 23 are in a disengaged relationship, and the rotation operation cap body 17 is rotated while the male screw tube 10 remains in a stopped state. When the small male threaded shaft 18 is screwed back together with the movement and the annular stopper 19 of the small male threaded shaft 18 comes into contact with the inner surface of the engagement recess 12 of the male threaded cylinder 10, it rotates with the male threaded cylinder 10. The operating cap body 17 is integrated and rotated together, and the male screw tube 10 is separated from the female screw portion 9 of the holding tube body 2.

Here, the elastic resistance between the gear-like engagement step portion 38 of the small male screw shaft 18 and the engagement sphere 36 is the same as the pressure resistance between the pawl gear 14 of the male screw barrel 10 and the engagement sphere 2 during pushing.
It is greater than the oppression resistance of 3. That is, if the rotary operation cap body 17 and the male threaded tube 10 rotate integrally at a torque equal to or lower than the first rotation torque, the rotary operation cap body 17 rotates integrally at a torque equal to or lower than a second torque greater than the first rotation torque. 17 and the small male screw shaft 18 are designed to rotate together, and in this embodiment, this second torque (threshold rotation torque at which the rotation operation cap body 17 begins to idle) is set to approximately 22 kg·cm. ing.

As described above, according to this embodiment, by rotating the rotary operation cap body 17, the small cylinder 1
The male screw tube 1
0 screws forward, and when the repulsive force of the sealing plate 26 acts, the male screw tube 10 automatically stops, and then the male screw tube 10
A small male screw shaft 18 that is screwed into the small cylinder 11 is screwed by a rotary operation cap body 17 having a large diameter difference, and the small cylinder 11
Press. Here, the rotary operation cap body 17 can be lightly rotated by the screw action on the small male screw shaft 18, and even workers with weak strength can smoothly and easily handle the small cylinder in medical institutions and other facilities. The opening of No. 11 can be opened.

Then, continue to rotate the rotary operation cap body 17, and cut the small cylinder and the cutting needle/guide unit 4 of the regulator 1.
Even if the small cylinder 11 comes into contact with the mounting surface, the second ratchet action prevents it from being pressed over a predetermined pressure, so there is no damage to the device, and the small cylinder 11 can be easily removed with a light force. can be done.

In addition, in FIG. 1, a part of the gas sent out to the outlet part 24 of the regulator 1 is sent to the cylinder 40 through the connecting pipe 41, thereby pushing out the lock pin 42, and the tip of the lock pin 42 is pushed out. It engages the hole 43 of the body 17.

As a result, the lock pin 42 restricts the rotation of the rotary operation cap body 17 from now on, and the gas cylinder 1
As long as there is gas remaining in the cylinder 1, the lock pin 42 is used to lock the gas cylinder 11, so it is impossible to rotate the rotary operation cap body 17 in the opposite direction and remove the gas cylinder 11 until the gas runs out. Extremely safe. Further, the hole 43 with which the lock pin 42 engages has a shape having an inclined part and a vertical part as shown in the fourth figure, and when the lock pin 42 engages with the hole 43, the rotation operation cap body 17 is moved. Although it is completely unrotatable in the removal direction, it is rotatable in the push-in direction against the pressing force of the lock pin 42. The reason for doing this is to enable the gas cylinder 11 to be pushed in further when the connection between the gas cylinder 11 and the regulator 1 is not complete.
The torque required to turn the rotation operation cap body 17 is
and the small male screw shaft 18.

[Effect of idea]

As described above, according to the present invention, the sealing plate of the gas cylinder can be easily opened with a light force, and the gas cylinder is not pressed against the regulator at a pressure higher than a certain level, which prevents damage to the device or when it is removed. A small gas cylinder mounting device that does not require a great deal of force can be provided.

[Brief explanation of drawings]

1 to 4 relate to an embodiment of the present invention, in which FIG. 1 is a sectional view of a gas cylinder mounting device, FIG. 2 is a sectional view taken along line A-A of the mounting device shown in FIG. 1, and FIG. 1 is a sectional view taken along line B-B of the mounting device shown in FIG. 1, FIG. 4 is a side view of the male screw tube and the rotary operation cap portion, and FIG. 5 is a sectional view of the conventional gas cylinder mounting device. In the figure, 1...regulator, 2...holding cylinder,
3... Fitting guide opening portion, 4... Cutting needle/air guide tube portion, 8... Opening portion, 9... Female threaded portion, 10... Male threaded tube, 11... Small cylinder, 12... Engagement Recessed portion, 13... End portion, 14... Pawl gear, 15... Pawl tooth portion, 16... Inner peripheral surface, 17... Rotating operation cap body,
18...Small male screw shaft, 19...Annular stopper,
22, 35... Small spring strip, 23, 36... Engaging sphere, 26... Seal plate, 31... Holding cylinder, 38... Gear-shaped engagement step portion.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) At one end of the gas cylinder tip fitting guide opening of the holder part for storing the gas cylinder, a mounting part having a tip needle part which also serves as an air guiding pipe part for breaking the gas cylinder seal plate is provided. On the other hand, a male threaded tube is provided in the female threaded portion disposed in the opening at the other end of the holder portion, and a male threaded tube is provided to be screwed with the female threaded portion, and a male threaded tube is provided approximately at the center of the bottom surface of the male threaded tube. A small female threaded portion is provided, and the small female threaded portion is rotatably held approximately at the center of a rotating operation cap body having an inner circumferential surface having a larger diameter than the outer diameter of the end of the male threaded tube. A gas cylinder mounting device in which a small male screw shaft is screwed through each other, and the gas cylinder is pressed and mounted by the small male screw shaft, and the rotating operation cap body and the male thread cylinder are connected to a first and the small male screw shaft and the rotary operation cap body are engaged so as to be integrally rotatable at a rotational torque of less than or equal to the first rotational torque. A small gas cylinder mounting device characterized by: (2) For engagement below the first rotational torque, a continuous tooth-like pawl portion with an engagement step portion provided at the end of the male screw tube is formed integrally or with a separate member, and rotation operation is performed. It is formed by engaging an engaging sphere attached to the cap body and pressed in the axial direction by a small spring, and the second
Engagement at a rotational torque of less than 100 lbs. is achieved by forming a gear-like pawl tooth at the rear end of the small male screw shaft, and engaging an engaging sphere attached to the rotating operation cap body that can be pressed in the axial direction with a small spring. A small-sized gas cylinder mounting device according to claim 1, which is characterized in that: