JPH06620B2 - Cable length switching device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a cable length switching device that switches a payout length of a cable for suspending an ocean sensor before extension.

[Conventional technology]

Conventionally, this type of device is a combination of the device shown in Japanese Utility Model Application No. 61-21 and the device shown in Japanese Patent Application No. 61-112757, and the extension length of the cable for suspending a marine sensor corresponding to an electric signal. I realized a device to switch.

FIG. 4 is a perspective view of a main part showing a conventional example, and FIG. 5 is a side sectional view showing an ocean sensor equipped with the same conventional example.

First, in FIG. 5, reference numeral 1 is a floating portion having buoyancy, 2 is a cable pack portion in which cables for suspension are stored, 3
Is a sensor unit which is the main body of the ocean sensor, 4 is a cylindrical case for accommodating each of these mechanisms, and 5 is a cable length switching device installed between the floating portion 1 and the cable pack unit 2.

Hereinafter, the configuration of the cable length switching device 5 will be described by taking a cable length switchable in three stages as an example.

In FIG. 4, 6a and 6b are switching strings, one end of which is locked to a predetermined feeding position of the cable 7 wound around the air core, and 8a and 8b of which one end is fixed on the pressing plate 9 and the other end is fixed. A wire-like spring 10 holding the end portions of the switching strings 6a and 6b through the wire-like springs 8a and 8b,
8b is a lever whose tip is rotated and moved, and these wire springs 8a and 8b and the lever 10 are used for the switching string 6
A fixing means for fixing a and 6b is configured.

The fixing means has no fixing action unless it operates.

Reference numeral 11 denotes a shaft for rotating the lever 10, and the lever 10 and the shaft 11 are fitted so as to be detachable in the expanding direction so that they can be separated when expanding.

The switching string 6a is locked at a position shorter than the locked position of the switching string 6a, and when the air-cord-wound cable 7 is sequentially fed out from the inside, the portion of the switching string 6a is first. But next, switching string 6b
The part of is put out in a positional relationship.

Reference numeral 12a denotes a coil spring that locks one end of the shaft 11 to urge a right rotation, 13a a rod spring that urges a support of the other end of the coil spring 12a, and 14a heats a tip of the rod spring 13a. A thread that melts at 15a, a resistance that heats when a current is applied by twisting the middle of the thread 14a, and 12a is a shaft 11
Coil spring that locks one end to and biases left rotation, 13a
Is a rod spring for urging the support at the other end of the coil spring 12b,
14b is a thread that supports the tip of the rod spring 13b and melts by heat,
Reference numeral 15b is a resistance that generates heat when the yarn 14b is entangled in the middle and energized, and constitutes an operating mechanism for selectively fixing the switching strings 6a and 6b.

16 is a pin for fixing the threads 14a and 14b.

Next, the operation will be described with reference to FIGS. 6 (a) and 6 (b).

Before the marine sensor begins to spread, it is installed in the floating portion in the state shown in Fig. 6 (a), and the shaft 11 rotates and fits in response to the electric signal sent from the control unit (not shown). The lever 10 being rotated is rotated. After the operation of the lever 10 is completed, the marine sensor extends the cable 7 while unrolling the cable 7. The cable 7 is extended by the switching string 6a or the switching string 6b until it stops and is fixed, and finally it is stretched as shown in FIG. 6 (b), and the sensor section 3 is hung up to the depth L. Can be lowered.

First, the case where the depth L is shallow will be described.

When the resistor 15a is energized by an electric signal sent from the controller, the resistor 15a generates heat, melts the thread 14a, and the rod spring 13a loses its support.

As a result, the rod spring 13a is deformed by the urging force, and it becomes impossible to support the coil spring 12a. Therefore, the coil spring 12 becomes free, and the shaft 11 rotates counterclockwise by receiving only the counterclockwise biasing force of the coil spring 12b, and the lever 10 fitted to the shaft 11 is engaged.
Also rotates counterclockwise, and its tip moves below the wire-shaped spring 8a that penetrates the switching string 6a.

As a result, the cable 7 that is unwound during expansion is unwound to the point where the switching string 6a is locked,
Even if the cable 7 pulls out the switching string 6a from the wire spring 8a and tries to pull it out from the cable pack portion 2, the lever 10 and the wire spring 8a cross each other, so the switching string 6a cannot be pulled out, and the switching The cord 6a is fixed to the retainer plate 9, and the cable 7 is fixed so that the cable length does not extend further.

Next, a case of switching to a deeper depth L will be described. When a signal is sent from the control unit to energize the resistor 15b, it operates in the same manner as when the resistor 15a is energized as described above, and the shaft 11 rotates clockwise and the lever 10 rotates clockwise. As a result, the switching string 6b is attached to the lever 1
Fixed by 0. The cable 7 is unwound during the expansion, and when it reaches the position where the switching string 6a is locked, the lever 10 and the wire spring 8a do not intersect, so the switching string 6a is wire-shaped by the cable 7. It is pulled out from the spring 8a and fed out together with the cable 7. Further, when the cable 7 is further extended and reaches the position where the switching string 8b is fixed, even if an attempt is made to pull out the switching string 8b, the above-mentioned shallow depth L
Similarly to the switching string 8a at the time of setting, the cable 7 fixed to the pressing plate 9 does not extend further and the cable length is fixed.

Next, the case of switching to the deepest depth L will be described.

A signal is sent from the control unit so that the resistors 15a and 15b are not energized. At this time, the shaft 11 does not rotate,
When the cable 7 is unrolled at the time of extension and reaches the position where the switching string 6a and the switching string 6b are locked, the lever 10 and the wire springs 8a and 8b do not cross each other. 6a and 6b are pulled out from the wire-shaped springs 8a and 8b, respectively, and are paid out together with the cable 7. The cable 7 is extended further,
Eventually, the entire length is paid out, the expansion is completed, and the sensor length is fixed at a position where the cable length is fixed and the depth L is the deepest.

[Problems to be solved by the invention]

However, according to the conventional technology with the above-mentioned configuration, there is a problem that the number of parts and the number of assembling steps are large, so that variations in each part are accumulated and the operation reliability is lowered.

Also, due to the resistance that heats up when electricity is applied, the time that the thread melts depends on the environmental temperature, and the operating time varies, and in some cases, the switching mechanism operates before the floating part and the cable pack part separate and the expansion begins. However, there is a problem that the desired depth cannot be set.

In view of the above problems, the present invention solves the problem that fixing of the switching string is performed by the operation of the fixing means, the number of parts is small, and the switching string is fixed or released without being influenced by the environmental temperature. It is an object of the present invention to obtain a configuration and realize a cable length switching device having high operation reliability.

[Means for solving problems]

In order to achieve the above object, the present invention has a configuration in which the switching string is fixed in advance and the release is selectively executed.

That is, according to the present invention, the switching string having one end locked at a predetermined position of the cable housed in the case so that the cable can be drawn out, and the other end of the switching string are selectively connected to the case side by a command from the control unit. In a cable length switching device having fixing means for fixing, as the fixing means, a fixed thread having one end locked on the apparatus case and the other end connected to a switching string, and the fixed thread which is activated by energization A cutter to be cut and a power cable for energizing the cutter are provided, and
It is characterized in that a power cable cutting means for cutting the power cable after the operation of the cutter is provided.

[Action]

According to the present invention having the above-described configuration, the switching strings are locked in advance at one or a plurality of length switching positions on the cable for each position, and each of them is fixed on the device case by a fixing thread. .

Then, when using the ocean sensor, select the desired cable length from the above step, energize and cut the fixing thread of the switching string that does not need to be fixed and held through the power cable to the cutter, and feed out the switching string. You can try not to resist.

〔Example〕

 Embodiments will be described below with reference to the drawings.

FIG. 1 is a perspective view of an essential part showing an embodiment of the present invention, and FIG. 2 is a side sectional view showing an ocean sensor equipped with the same embodiment.

First, in FIG. 2, reference numeral 1 is a floating portion having buoyancy, 2 is a cable pack portion in which cables for suspension are stored, 3
Is a sensor unit that is the main body of the ocean sensor, 4 is a cylindrical case for accommodating each of these mechanisms, and 17 is the cable length switching device of this embodiment installed between the floating portion 1 and the cable pack unit 2.

The configuration of the cable length switching device 17 will be described below.

In FIG. 1, 7 is a cable, 18a and 18b are switching strings locked at predetermined positions of the cable 7, 9 is a holding plate of the cable pack portion 2, and 19a and 19b are fixed on the holding plate 9. It is a locking part.

In this embodiment, the switching string 18a is locked at a position shorter than the locking position of the switching string 18b.

That is, when the air-cord-wound cable 9 is sequentially fed out from the inside, the portion of the switching string 18a and the portion of the switching string 18b are in a positional relationship of being fed first.

Numerals 20a and 20b are fixed threads, one end of which is fixed to the locking portions 19a and 19b, and the other end of which is connected to the switching strings 18a and 18b. In this embodiment, they are formed into a ring shape in order to strengthen the fixing force. .

21a and 21b are activated by energization, and the cutting portion 22
a fixed thread cutting cutter that cuts the fixed thread that has passed through a and 22b; 23a and 23b are fixed thread cutting cutters 21a and
21b is a power cable for energizing.

In the present embodiment, as the fixed yarn cutting cutters 21a and 21b, those having a structure in which the explosive or combusting agent inside is ignited by energization to generate combustion gas and the blade operates by this gas pressure are used.

Reference numeral 24 is a power cable cutting cutter that is activated by energization after the fixed thread cutting cutter is activated and collectively cuts the power cables 23a and 23b that have passed through the cutting portion 25, and 26 is a power cable that energizes the power cable cutting cutter. The power cable cutting cutter 24 is fixed to the floating portion 1.

In this embodiment, the power cable cutting cutter 24 has the same structure as the fixed thread cutting cutters 21a and 21b.

Although not shown, a power supply for energization and a control unit for controlling this energization are mounted on the levitation unit 1.

The operation of this embodiment having the above configuration will be described with reference to the drawings.

FIG. 3 (a) is a view before the deployment of the ocean sensor using this embodiment,
FIG. 3 (b) is a side sectional view showing the state after the expansion.

Before the marine sensor is expanded, the floating part 1, the cable pack part 2, and the sensor part 3 are stacked and housed in a cylindrical case 4 as shown in FIG. 3 (a).
After the operation of 7 is completed, the cable 7 is extended while being extended. The cable 7 stops being fed out by the switching string 18a or the switching string 18b and continues to be extended until it is fixed. Finally, the cable 7 is stretched as shown in FIG. 3 (b),
The sensor unit 3 is suspended to the depth L.

First, a case where the depth L is set to be the shallowest will be described.

When the ocean sensor enters seawater, the control unit mounted on the floating portion 1 is activated, and the fixed thread cutting cutter 21a and the fixed thread cutting cutter 12b are not supplied with power, and the power cable cutting cutter 2
Energize 4.

As a result, the power cable cutting cutter 24 is ignited by the built-in explosive powder or combustion powder, and the cutting portion 25 is activated to cut the power cables 23a and 23b passing through the cutting portion 25.

As a result, the power supply cables 23a and 23b do not prevent separation of the floating portion 1 and the cable pack portion 2, so they are separated from each other, and the floating portion remains on the sea surface, and the cable pack portion 2 and the sensor portion 3 feed out the cable 7. While descending in the sea. At this time, the fixed yarn cutting cutters 23a and 23b do not operate as described above, and the fixed yarns 20a and 20b maintain the fixed state of the switching strings 18a and 18b, respectively.

As a result, when the cable 9 is extended to a predetermined length to which the switching string 18a is fixed, the cable 9 tries to extract the switching string 18a from the cable pack portion 12.
However, since the switching string 18a is fixed to the pressing plate 9 by the fixing thread 20a, this is the limit of feeding.

For this reason, the cable cannot be unreeled thereafter, the descent of the cable pack unit 2 and the sensor unit 3 is stopped, and the cable pack unit 2 and the sensor unit 3 are held at this depth, and the extension at a shallow depth is completed.

Next, a case where the depth L is set to the middle will be described.
In this case, the fixed yarn cutting cutter 21a is supplied with power from the control unit through the power cable 23a.
Not supplied to 1b. As a result, the fixed thread cutting cutter 2
1a is a cutting part 2 when the built-in explosive or combustion powder is ignited.
2a is activated and the fixed thread 20a passing through the cutting portion 22a
Is disconnected.

The control unit cuts the power cable after a short delay after this 24
Supply power to. As a result, the power cable cutting cutter 24 is ignited by the gunpowder or combustible powder contained in the power cable cutting cutter 24 to operate the cutting section, and the power cable 23 passing through the cutting section 25.
Cut a and 23b.

As a result, the power cables 23a and 23b do not hinder the separation of the floating portion 1 and the cable pack portion 2 from each other, and the floating portions 1 remain on the sea surface, and the cable pack portion 2 and the sensor portion 3 feed the cable 7. While descending in the sea.

At this time, the fixed thread cutting cutter 21a operates as described above, and the fixation of the switching string 18a has already been released. Therefore, the cable 7 is thereby released from the switching string 1a.
When 8a is extended to a predetermined length that is locked, the switching string 18a is extended from the cable pack section 2.

Subsequently, the cable 7 is extended to a predetermined length where the switching string 18b is locked, and then the switching string 18b is released.
Although a is going to be fed out from the cable pack part 2, the fixed yarn 20b of the switching string 18b is not cut, so that the fixed state is held, and this is the limit of feeding.

For this reason, the cable cannot be paid out after that, the descent of the cable pack unit 2 and the sensor unit 3 is stopped, the cable is held at this depth, and the extension of the intermediate depth is completed.

Next, the case where the depth L is set to the deepest will be described.

In this case, the control unit supplies power to the fixed yarn cutting cutter 21a and the fixed yarn cutting cutter 21b through the power cables 23a and 23b. As a result, the fixed yarn cutting cutters 21a, 2a
1b is a cutting portion 2 when the built-in explosive or combustion powder is ignited.
2a and 22b operate, and the fixed threads 20a and 20b are cut.

After that, the control unit supplies power to the power cable cutting cutter 24. As a result, the power cable cutting cutter 24 is ignited by the gunpowder or the combustion agent or the like contained in the power cable cutting cutter 24 to operate the cutting portion 25, and the power cable 23a passing through the cutting portion 25,
23b is cut.

As a result, the power cables 23a and 23b do not prevent separation of the floating portion 1 and the cable pack portion 2 from each other, so that they are separated from each other and the floating portion remains on the sea surface.
The sensor unit 3 descends in the sea while feeding the cable 7.

At this time, as described above, the fixed yarn cutting cutters 21a, 2a
1b has been actuated and the fixation of the switching strings 18a, 18b has already been released. Therefore, when the cable 7 is extended to a predetermined length where the switching strings 18a are locked, the switching strings 18a are removed. When it is unwound from the cable pack portion 2 and further unwound to a predetermined length where the switching string 18b is locked, the switching string 1
8b is paid out from the cable pack unit 2.

When the entire stored portion of the cable 7 is unwound, the cable 7 is fixed at the end of the cable (not shown), and this is the limit of unwinding, and the extension at the deepest depth is completed.

In addition, in the present embodiment, switching of the cable length is set and described in three stages, but the present invention is not limited to this.
It is possible to freely set the number of switches by increasing or decreasing the number of switching strings and correspondingly increasing or decreasing the installation of the fixed thread and the fixed thread cutting cutter.

〔The invention's effect〕

As described in detail above, according to the present invention, a switching string having one end locked at a predetermined position of the cable housed in the case so as to be able to be drawn out, and the other end of the switching string,
In a cable length switching device having a fixing means for selectively fixing to the case side in response to a command from a control section, as the fixing means, a fixing thread having one end locked on the device case and the other end connected to a switching string, The switching string is provided with a cutter that is activated by energization to cut the fixed thread, and a power cable that energizes the cutter, and a power cable cutting means that cuts the power cable after the cutter is activated. Is set in advance as a fixed state, and this cancellation can be selectively executed.

This eliminates the need for a complicated actuating mechanism, reduces the number of parts, and enables the fixing or unfixing of the switching string to be performed without being affected by the ambient temperature, achieving a highly reliable cable length switching device. There is an effect of doing.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a side sectional view of an ocean sensor using the same embodiment, and FIGS. 3 (a) and 3 (b).
Is a side sectional view showing the operation of the same embodiment, FIG. 4 is a perspective view showing a conventional example, FIG. 5 is a side sectional view of an ocean sensor using the same conventional example, and FIGS. 6 (a) and 6 (b). FIG. 4 is a side sectional view showing the operation of the conventional example. 7 ... Cable 18a, 18b ... String for switching 20a, 20b ... Fixed thread 21a, 21b ... Fixed thread cutting cutter 22a, 22b ... Cutting part 23a, 23b ... Power cable 24 ... Power cable cutting cutter 25 ... Cutting part 26 ... Power cable

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tomoaki Kakuma 1-7-12 Toranomon, Minato-ku, Tokyo Oki Electric Industry Co., Ltd. (56) References

Claims (2)

[Claims] 1. A switching string having one end locked at a predetermined position of a cable housed in a case so that the cable can be drawn out, and the other end of the switching string is selectively fixed to the case side by a command from a control unit. In the cable length switching device having a fixing means, a fixing thread having one end locked on the apparatus case and the other end connected to a switching string as the fixing means, and the fixing thread that is activated by energization to cut the fixing thread. A cable length switching device comprising: a cutter for cutting and a power cable for energizing the cutter; and a power cable cutting means for cutting the power cable after the cutter is activated. 2. The cable length switching device according to claim 1, wherein the power cable cutting means is provided with a cutter that is activated by energization to cut the power cable.