JPH0331677Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an automatic release device for safely and quickly releasing the lashing devices of inflatable liferafts mounted on ships, etc. in the event of a marine accident. It is something.

[Prior art]

A conventional automatic detachment device of this type is shown in FIG. This device has a front main body 11
A rubber diaphragm 15 is sandwiched between the rear main body 12 and the rear body 12, and this diaphragm 15
The shaft hole of the rear main body 12 has a stepped release shaft 10.
is inserted into the shaft. A presser plate 14 of a diaphragm 15 is fitted onto the front shaft of the detachment shaft 10, and a spring 13 that determines the operating pressure of the device is elastically inserted between the presser plate 14 and the front main body 11. It is fitted. A nut 18 for integrating the detachment shaft 10 and the diaphragm 15 is screwed into the threaded portion on the front end side of the detachment shaft 10 via a presser plate 14. A sealed chamber B is formed inside the front main body 11 using the diaphragm 15 as a separation band, and the inside of the rear main body 12 is connected to the outside air through a ventilation hole 12a penetrating one end of the outer peripheral surface. A pressure chamber C is formed. In this case, on the external back surface of the rear main body 12, one end side of the two laminated plates is opened to form a gap A having a width that allows the trigger 9 to be inserted.
In addition, a mounting plate 8 having a bearing hole 8a penetrating the front and rear surfaces approximately in the middle of this gap A is mounted with the front surfaces joined. Bearing hole 8 above
The rear shaft of the above-mentioned detachment shaft 10 is slidably fitted into the shaft a. Further, a push button 17 is fitted into the rear shaft end of the detachment shaft 10 which is exposed to the rear outside from the bearing hole 8a. A notch 10a is formed at one end of the rear shaft of the detachment shaft 10.
An intermediate piece 16 that cooperates with the trigger 9 is rotatably fitted into the gap A near the notch 10a. Further, a trigger 9 is fitted into the opening position of the gap A so that the opening can be opened by rotating the intermediate piece 16 by pressing the push button 17.

In the conventional automatic detachment device having the above configuration, by pressing the push button 17, the detachment shaft 10 moves to the sealed chamber B side together with the diaphragm 15. At this time, the above-mentioned push operation rotates the intermediate piece 16, in which the detachment shaft 10 was previously locked through the notch 10a, so that the trigger 9 that cooperates with this intermediate piece 16 is released at the same time. It is constructed so that the lashings of inflatable liferafts can be released in the event of a maritime disaster.

However, the conventional automatic detachment device has the following drawbacks due to the above-mentioned configuration.

(1) Since the diaphragm 15 is constantly exposed to the outside air through the ventilation hole 12a, the aging phenomenon of the rubber is accelerated.

(2) Since the diaphragm 15 is sandwiched between the front main body 11 and the rear main body 12, it is impossible to check the main parts unless the entire diaphragm 15 is disassembled.

(3) The above configuration makes it extremely difficult to replace internal parts.

(4) If there is a crack in the diaphragm 15, you will not be able to push the release shaft 10 immediately.
Trigger 9 cannot be opened quickly.

(5) Diaphragm 1 required to open trigger 9
Since there is a limit to the minimum setting of the operating diameter of the spring 5 and the operating pressure of the spring 13, the device becomes large.

(6) Since the pressurized chamber C communicates with the outside air through the ventilation hole 12a, the diaphragm 15 may malfunction due to changes in atmospheric pressure.

[Summary of the idea]

The present invention is connected to a life preserver and has a ball groove 9.
a plate-shaped trigger 9 having a shape of 1.a, a mounting plate 8 having a cavity A in which the ball groove 9a side of the trigger 9 is accommodated, and a bottom face facing the cavity A;
A cylindrical body 1 has a hole 1a facing the ball groove 9a on the bottom surface, and a tapered surface 1d rising upward toward the bottom surface on the inner surface of the cylindrical body 1 at a midpoint. a presser ball 2 that partially protrudes from the hole 1a in the bottom surface and fits into the ball groove 9a;
an actuating cylinder shaft 3 having a ball hole 3a in a side portion that substantially corresponds to the tapered surface 1d;
A pressurizing shaft 4 which is housed in the actuating cylinder shaft 3, has a large diameter portion at the tip end, a small diameter portion at the rear end, and a tapered surface 4a that is inclined from the narrow diameter portion toward the thick diameter portion; A ball 7 that is housed in the ball hole 3a and operates so as to slide in and out of the tapered surface 4a, and a compression spring 5 that biases the pressurizing shaft 4 in a direction away from the bottom surface of the operating cylinder shaft 3. When the pressurizing shaft 4 is pressed backward by the biasing force of the compression spring 5 so that the large diameter portion corresponds to the ball hole 3a, the ball 7 is pressed by the large diameter portion and the ball 7 is pressed. The presser ball 2 is configured to protrude from the ball hole 3a and engage the tapered surface 1d of the cylindrical body 1 to lock the pressurizing shaft 4, and the presser ball 2 is fitted into the ball groove 9a, thereby solving the above-mentioned drawbacks. This will be explained in detail below using examples.

[Example of idea]

FIG. 1 is a sectional view showing an embodiment of an automatic detachment device according to the present invention. In the figure, a cylindrical body 1 has a tapered step hole 1a formed through its axis, which matches a ball groove 9a of a plate-shaped trigger 9. The cylinder 1 according to this embodiment has a trigger 9 inside.
The tapered surface of the tip end side hole of the tapered stepped hole 1a is located at the inner hole position of the mounting plate 8, which has a gap A that allows the fitting of the tapered step hole 1a.
It is mounted in such a way that it matches the ball groove 9a of the trigger 9 inserted therein. At the dividing position between the large diameter hole on the front half side and the small diameter hole on the rear half side of the tapered step hole 1a, there is a midway tapered surface 1d that communicates with both diameters.
is formed. Note that the mounting plate 8 described above is fixed to a drop table or the like (not shown).

Next, in the tapered step hole 1a of the cylinder 1, a presser ball 2 is inserted into the ball groove 9 of the trigger 9.
It is inserted so that it can be engaged in the inside of a. Adjacent to this presser ball 2, the tapered stepped hole 1a has a cylindrical shape with its front end closed and its rear end opened, and a plurality of ball holes 3 are formed in the middle of the circumferential surface.
An actuating cylinder shaft 3 extending through a is inserted so as to be able to slide back and forth in such a manner that it presses the presser ball 2 into the ball groove 9a of the trigger 9 with the support of a compression spring 6 from the rear. . In this case, the base end of the compression spring 6 is in pressure contact with a support plate 1b having a bearing hole 1c fitted into the rear opening position of the cylindrical body 1.

Inside the actuating cylinder shaft 3 as described above, there is a pressurizing shaft 4 having a large diameter tip fitted with a compression spring 5, the large diameter part slidingly contacts the inner diameter part of the actuating cylinder shaft 3, and the small diameter rear end. Inserted into the bearing hole 1c of the support plate 1b,
It is inserted so that it can be slid back and forth by the support of the compression spring 5. In this case, a tapered surface 4a is formed in the middle of the large diameter portion and the small diameter portion of the pressurizing shaft 4 so as to communicate with both diameters. In a state in which the large diameter side end of this tapered surface 4a is in a positional relationship that matches the ball hole 3a formed in the midway circumferential surface of the actuating cylinder shaft 3, a plurality of balls 7 are arranged in the ball hole 3a facing each other. One end of each spherical surface is in contact with a mid-way tapered surface 1d that is provided halfway within the tapered stepped hole 1a of the cylinder body 1 and stands up so as to face the bottom side, and the other end of the spherical surface is fitted in a retractable and rollable manner by slidingly contacting the large diameter portion of the pressurizing shaft 4 adjacent to the tapered surface 4a.

The presser ball 2 described above receives the pressing force of the actuating cylinder shaft 3 from the rear due to the support of the compression spring 6, and this pressing force is applied to the ball 7 fitted in the ball hole 3a of the actuating cylinder shaft 3. Midway tapered surface 1d of cylinder 1
The retraction prevention is maintained by the state in which the trigger 9 is in contact with the trigger 9, and the trigger 9 is engaged in a pressing manner in the ball groove 9a of the trigger 9.
As a result, the trigger 9, which has one end attached to a tightening band (not shown), is configured to maintain its fastening state even when it is under tension in the direction of the arrow. In addition, this trigger 9 is configured such that when the pressurizing shaft 4 receives a forward pressing force, the ball 7 is retracted into the actuating cylinder shaft 3, and the ball 7 is held to prevent the presser ball 2 from retreating. By disappearing,
It is configured such that the pressing force by the presser ball 2 is reduced and the clamped state is released by the tension in the direction of the arrow. In other words, the above configuration is as follows. That is, a plate-shaped trigger 9 connected to a life preserver and having a ball groove 9a, a mounting plate 8 having a cavity A in which the ball groove 9a side of the trigger 9 is housed, and a bottom surface of the trigger 9 having a cavity A.
A cylindrical body 1 having a hole 1a facing the ball groove 9a on the bottom surface thereof and a tapered surface 1d rising upward toward the bottom surface on the inner surface side at a midway point, and a bottom surface of this cylindrical body 1. a presser ball 2 which is housed on the side and partially protrudes from the hole 1a in the bottom surface and fits into the ball groove 9a; 2 to fit a part of the presser ball 2 into the ball groove 9a, and also press the tapered surface 1d.
The actuating cylinder shaft 3 has a ball hole 3a on the side that approximately corresponds to the cylindrical shaft 3. A pressurizing shaft 4 having a tapered surface 4a inclined in the radial direction, a ball 7 housed in the ball hole 3a and operating so as to slide in and out of the tapered surface 4a, and the pressurizing shaft 4. A compression spring 5 that biases the operating cylinder shaft 3 in a direction away from the bottom surface thereof is provided, and the pressurizing shaft 4 is pressed rearward by the biasing force of the compression spring 5 so that the large diameter portion corresponds to the ball hole 3a. When the above-mentioned large diameter portion presses the ball 7, the ball 7
is constructed so as to protrude from the ball hole 3a and engage with the tapered surface 1d of the cylindrical body 1 to lock the pressurizing shaft 4, and the presser ball 2 is fitted into the ball groove 9a.

Since this embodiment is configured as described above,
When locking, the large diameter portion of the pressure shaft 4 presses the ball 7 so that it protrudes outward from the ball hole 3a and locks on the tapered surface 1d, thereby pushing the actuating cylinder shaft 3 toward the rear. movement is prevented, and the presser ball 2 is pressed and engaged with the ball groove 9a. On the other hand, when the trigger 9 is released, as shown in FIG. 2, when the rear end of the pressure shaft 4 is pushed forward, the pressure shaft 4 moves forward against the internal compression spring 5. The ball 7, which had been fitted in the ball hole 3a of the actuating cylinder shaft 3, moves toward the narrow diameter portion along the tapered surface 4a and sinks in due to the forward movement of the large diameter portion of the pressure shaft 4. The operating cylinder shaft 3 moves back. As a result, the presser ball 2 retreats toward the pressure shaft 4 and leaves the ball groove 9a. At this time, since the trigger 9 is under tension in the direction of the arrow, it pushes the presser ball 2 further inward while being in sliding contact with the spherical surface of the presser ball 2. Due to the coordination of this operation, the actuating cylinder shaft 3 retreats while resisting the compression spring 6, and as a result, the presser ball 2 is completely separated from the ball groove 9a, so that the trigger 9 is released from the previously locked state. Can be opened.

[Effect of idea]

As explained above, the automatic release device according to the present invention includes a plate-shaped trigger 9 connected to a life preserver and having a ball groove 9a, and a mounting plate having a cavity A in which the ball groove 9a side of the trigger 9 is accommodated. 8, a cylindrical body whose bottom face faces the cavity A, has a hole 1a on the bottom face facing the ball groove 9a, and has a tapered face 1d rising up toward the bottom face on the inner side at a midway point; 1
A presser ball 2 is housed on the bottom side of the cylindrical body 1, a part of which protrudes from the hole 1a in the bottom surface and fits into the ball groove 9a, and the cylindrical body 1 is arranged so as to be able to move forward and backward in the direction of the presser ball 2. an actuating cylinder shaft 3 which is housed in the cylinder and presses the presser ball 2 to fit a part of the presser ball 2 into the ball groove 9a, and has a ball hole 3a on a side substantially corresponding to the tapered surface 1d; A tapered surface 4a is housed in the actuating cylinder shaft 3, and has a large diameter portion on the tip side and a small diameter portion on the rear end side, and further slopes from the narrow diameter portion side toward the large diameter portion.
a ball 7 which is housed in the ball hole 3a and operates to protrude and retract outward in sliding contact with the tapered surface 4a; and a compression spring 5 that biases the large diameter portion when the pressure shaft 4 is pressed rearward by the biasing force of the compression spring 5 and the large diameter portion corresponds to the ball hole 3a. The ball 7 is pressed by the part and the ball 7 enters the ball hole 3a.
The presser ball 2 is configured to protrude further and engage the tapered surface 1d of the cylinder 1 to lock the pressurizing shaft 4, and the presser ball 2 is fitted into the ball groove 9a. Since no rubber is used, the main parts are less likely to age or deteriorate, making the device more durable and reliable. Furthermore, since there are fewer components and a diaphragm that requires a large operating diameter is not used, the device can be made smaller and lighter and can be easily disassembled. Further, when the device is in operation, the inside of the device is shut off from the outside air, so even if there is a change in atmospheric pressure or the like, the trigger can be opened quickly without affecting the operation at all.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional configuration diagram showing an embodiment of an automatic detachment device according to the present invention, Fig. 2 is an explanatory diagram of the operation of the main parts of the same device, and Fig. 3 is a cross-sectional configuration diagram showing an example of a conventional automatic detachment device. It is. 1... Cylindrical body, 1a... Tapered step hole (hole),
1d...Midway tapered surface (tapered surface), 2...
Presser ball, 3... Operating cylinder shaft, 3a... Ball hole, 4
... Pressure shaft, 4a ... Tapered surface, 5, 6 ... Compression spring, 7 ... Ball, 8 ... Mounting plate, 9 ... Trigger, 9a ... Ball groove. In the drawings, the same reference numerals are used for the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A plate-shaped trigger 9 connected to the life preserver and having a ball groove 9a; a mounting plate 8 having a cavity A in which the ball groove 9a side of the trigger 9 is housed; A cylindrical body 1 having a hole 1a facing the ball groove 9a and a tapered surface 1d rising upward toward the bottom surface on the inner surface side at a midway point; Hole 1a on the bottom surface above
There is a presser ball 2 which partially protrudes and fits into the ball groove 9a, and a presser ball 2 which is housed in the cylindrical body 1 so as to be able to move forward and backward in the direction of the presser ball 2, and presses the presser ball 2 to release one part of the presser ball 2. an actuating cylinder shaft 3 having a ball hole 3a on the side substantially corresponding to the tapered surface 1d; A pressurizing shaft 4 having a tapered surface 4a whose side is a narrow diameter portion and which is inclined from the narrow diameter portion toward the thick diameter portion, and a pressurizing shaft 4 which is housed in the ball hole 3a and slides into contact with the tapered surface 4a and protrudes and retracts outward. The ball 7 that operates as shown in FIG.
and a compression spring 5 that biases away from the bottom surface of the ball, when the pressure shaft 4 is pressed rearward by the biasing force of the compression spring 5 and the large diameter portion corresponds to the ball hole 3a. The presser ball 2 is constructed so that the ball 7 is pressed by the large diameter portion, the ball 7 protrudes from the ball hole 3a, and is engaged with the tapered surface 1d of the cylindrical body 1 to lock the pressurizing shaft 4. An automatic release device characterized by being fitted into a ball groove 9a.