JPH08166528A - Pneumatic feeding device and pneumatic feeding method for wire - Google Patents

Abstract

PURPOSE: To provide a pneumatic feeding device for a wire capable of detecting only the meandering of a short pitch which damages the wire. CONSTITUTION: A meandering detecting section is composed of a passage path 9 for the straight wire, a recessed part 10 disposed on its wall surface side and a detecting means for detecting the meandering of the wire and intruding of the wire into the recessed part 10. There is no detection signal and the state is normal at A, B, C where the wire 1 linearly passes the passage path 9. Even in the case D the wire 1 meanders at such a long pitch at which the wire is not damaged, the wire 1 does not intrude into the recessed part 10 and, therefore, the detection signal is not emitted. In the case E where the wire 1 meanders at a short pitch, the wire 1 intrudes deep into the recessed part 10 and the abnormality is detected by a detecting means. Feeding speed is controlled by the detected abnormality. The meandering state is thus corrected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air flow transmission method and an air flow transmission method for a fragile wire rod such as a bundle of optical fibers, which is placed on an air flow and is sent to a conduit.

[0002]

2. Description of the Related Art When sending a wire into a pipeline while simultaneously sending an airflow and sending the wire into the pipeline by the airflow,
When the wire rod is fed into the conduit at a speed higher than that of the wire due to the air flow, the wire rod meanders in the conduit, increasing the transmission resistance, requiring a longer transmission time, and the meandering condition There is a problem that it becomes impossible to communicate if you proceed.

In response to this, the special table Sho 64-50030
As disclosed in Japanese Patent Publication No. 4, a part of the passage is curved, and when the wire rod is displaced toward the outside of the bend portion at this bend portion, a force that causes buckling of the wire rod is detected. There is known a technique for controlling the propulsive force of a wire by detecting that the wire is working.

An abnormality of the wire rod detected by such a conventional technique will be described with reference to FIG. In the figure, 1 is a wire rod and 16 is an anomaly detection conduit. FIG. 5A shows a normal transmission state. The speed at which the wire rod is sent by the air flow is higher than the feed-in speed of the wire rod. In such a state, the wire rod 1 has a passage inside the curved abnormality detecting conduit 16. In the abnormal state, the speed at which the wire is sent by the air flow becomes lower than the sending speed of the wire, and
As shown in, the wire 1 moves so that the outside of the curved abnormality detecting conduit 16 serves as a passage.

However, in the state where this outward movement only occurs, the wire rod 1 only forms a large-diameter bend along the abnormality detecting conduit 16, and the wire rod 1 is mechanically damaged. There is no bend to receive. At this point, if the feeding speed is controlled to decrease the feeding speed, the feeding speed will be reduced more than necessary, and there is a problem of increasing the total feeding time.

Further, in the method of using the curved portion for detecting the abnormality, the wire 1 always comes into contact with the wall surface of the abnormality detecting pipe 16 to generate friction, which causes resistance, so that a part of the transmission force. It resulted in the disadvantage of losing.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and detects only the meandering of a short pitch that damages the wire rod and controls the feeding speed to detect the wire rod. It is an object of the present invention to provide an air flow device and a method for air flow of a wire that does not give unnecessary resistance to the air flow.

[0008]

According to the present invention, in the first aspect of the present invention, a wire rod is sent to a pipe line, at the same time an air flow is sent, and the air flow line sends the wire rod to the pipe line. In the feeding device, a meandering detector is provided in the vicinity of the pipe side of the wire rod feeding portion, the meandering detector is a linear wire passage, and a concave portion provided on the wall surface side of the passage, It is characterized in that it has a detection means for detecting that the wire rod meandered and entered the recess.

According to a second aspect of the present invention, in the wire airflow transmitting device according to the first aspect, the bending diameter is such that the diameter of the arc including the front and rear ends of the recess and the wire rod detection point is allowed in the wire rod. It is characterized by being larger.

According to the third aspect of the invention, in the airflow method of the wire rod, the wire rod is sent together with the airflow into the pipe line and the wire rod is sent to the pipe line by the airflow. By providing a passage having a concave portion in the concave portion and detecting that the wire rod has entered the meandering detection point provided in the concave portion, and controlling the feeding speed of the wire rod, there are three points of the front and rear ends of the concave portion and the meandering detection point. It is characterized in that the wire is sent while maintaining the bending radius of the wire to be equal to or larger than the diameter of the circle containing.

In a fourth aspect of the present invention, in the airflow method for a wire rod, the wire rod is sent together with the airflow into the pipe line, and the wire rod is sent by the airflow to the pipe line. When a passage is provided with a concave portion and it is detected that the wire rod has entered the meandering detection point provided in the concave portion,
The feature is that the feeding operation of the wire is stopped.

According to a fifth aspect of the present invention, in the wire rod airflow method according to the fourth aspect, the wire rod is removed from the meandering detection point provided in the recess by the movement of the wire rod by the air flow. The wire feeding operation is restarted.

[0013]

According to the present invention, the meandering detection is performed by the passage of the linear wire, the concave portion provided on the wall surface side of the passage, and the detection means for detecting the meandering of the wire into the concave portion. Since the section is configured, the detection unit does not affect the transmission resistance.

An example of the recess in the present invention and the state of progress of the wire will be described with reference to FIG. In the figure, 1 is a wire rod, 9 is a passage, and 10 is a recess. 3A, 3B, and 3C show a state in which the wire rod 1 linearly passes through the passage 9. FIG.
As shown in FIG. 3A, when the wire rod 1 passes through the center of the passageway 9, as shown in FIG. As shown in (), the wire rod 1 is in a normal state in any of the cases where the wire rod 1 is in contact with the wall surface of the passage 9 away from the concave portion 10 and passes.

As shown in FIG. 3 (D), when the wire rod 1 meanders at a long pitch so as not to be damaged and passes through the passage 9, the wire rod 1 will have an edge portion at both ends or one end of the recess 10. Is supported by the concave portion 10 and does not enter the concave portion 10.
No detection is made by the detection means (not shown) configured to detect that the wire rod 1 has meandered and entered 0, and is determined to be in a normal state. As shown in FIG. 3 (E), when the wire rod 1 meanders at a short pitch, the wire rod 1 enters the recess 10 and an abnormality is detected by the detection means. Depending on the detected abnormality, the feeding speed can be controlled to recover the meandering state.

Therefore, in the present invention, as shown in FIG. 4, by adjusting the length and the depth of the concave portion, the detection sensitivity can be matched with the pitch of the meandering to be detected as an abnormality. That is, it is assumed that the cross-sectional shape of the recess in the length direction is an arc for convenience. Edge E1 of the recess
When the distance between E2 L, the depth of the detection point P at the lowermost position of the concave portion is D, the bending radius R of the wire that matches the ^{arc, R = ((L 2/} 4) + D 2) / 2D Therefore, R is determined by L and D.

[0017]

1 is a schematic configuration diagram of an example of an embodiment of an air flow communicating device of the present invention. In the figure, 1 is a wire rod, 2 is a wire rod feeding part, 3 is a meandering detection part, 4 is an air flow supplying part, 5 is a pipe line, 6 is a feeding roller, 7 is a primary seal, 8 is a secondary seal, and 9 is a passage. The passages, 10 are concave portions, 11 are compressed air supply ports, and 12 and 13 are air streams.

In the conventional air flow feeding device, the air flow supply unit 4 is directly connected to the feed unit 2, and the wire rod 1 introduced through the secondary seal 8 is driven by the feed roller 6 to supply the air flow from the primary seal 7. It is sent to the conduit 5 via the section 4. In the air flow supply unit 4, the compressed air supply port 11
The airflow 12 sent from the above is made to flow in the pipe line 5, and the wire rod 1 is sent to the pipe line 5 by being carried on the airflow 13.

In the example of this embodiment, the feeding unit 2
The meandering detection unit 3 is provided between the air flow supply unit 4 and the air flow supply unit 4. The meandering detection unit 3 has a recess 10 in a part of the wall surface of the linear passage 9.
Is formed, and the recess 10 is provided with detection means for detecting a wire rod that has entered the interior of the recess.

FIG. 2 is an illustration of an example of the detecting means.
In the figure, 9 is a passage, 10 is a recess, 14 is a spring-like electrode, 1
5 is a fixed electrode. Wire rod is recessed to the depth to be detected 1
When entering 0, the spring-like electrode 14 becomes the fixed electrode 15
It is possible to detect the meandering by contacting with. The detection means is not limited to such a mechanical method, and the light source and the light receiving portion are arranged to face each other at a predetermined depth in the concave portion 10, and a wire rod is inserted between them to block the incident light to the light receiving portion. Accordingly, various known position detection methods such as a method of detecting meandering can be used.

Further, the recess 10 has a rectangular cross-section in the lengthwise direction. As described with reference to FIG. 3, it is not necessary to have an arc shape, and even with such a shape, meandering can be detected. It is preferable that the edge portion of the concave portion has a curved surface with a corner so that the passing wire is not damaged.

Regarding the size of the concave portion, when an optical fiber bundle in which optical fibers are assembled is used as a wire rod, it is necessary to keep the radius of curvature of 30 mm or more in order to maintain mechanical strength. In this case, the radius of the circular arc including the three edge position positions and the meandering detection points of the recess described with reference to FIG.
It is necessary that it is at least mm.

As such a condition, the length (L) is 3
It is preferable to provide a concave portion having a shape of 2 mm and a depth (D) of the detection portion of 5 mm, or a length (L) of 25 mm and a depth (D) of 3 mm on the side surface of the passage. Of course, other values can be adopted based on the relational expression described in FIG.

Further, regarding the wire covered with foamed polyethylene, when the bending diameter becomes smaller than a certain diameter with respect to the outer diameter of the wire, the foamed polyethylene layer is plastically deformed, so that the restriction of the bending diameter may be more severe than in the above examples. is there. The bending diameter in this case has been found by the inventors to be 18 times or more the wire diameter. When a bend having a smaller diameter than this is given, the bent shape remains on the wire rod, and the pumping performance deteriorates.

A specific example of the embodiment described with reference to FIG. 1 will be described together with a comparative example. The pipe used has an inner diameter of 4.
A polyethylene pipe with a length of 5 mm and a length of 300 m is used with a body diameter of 1
m is a bundle wound around a drum, and the wire has an outer diameter of 2
One having 7 of 50 .mu.m optical fiber strands as the center and 6 of them arranged around the optical fiber strands was used, which was coated with foamed polyethylene to have an outer diameter of 2 mm. Further, as the air flow, dry air having a pressure of 3 kg / cm ² was supplied.

In the comparative example, in the air flow communication device described with reference to FIG. 1, a portion corresponding to the passage of the meandering detector is a hollow duct having the same diameter as that of the duct not including the recess. Using a transparent curved pipe line that bends the pipe line near the outlet of the air flow supply unit at a radius of 150 mm and a bend angle of 40 °,
The position of the wire rod was visually observed from outside the conduit, and the feeding speed was controlled so as not to cause meandering.

As a result, at the start of the transmission, the speed was 20 m / min, but at the speed of 300 m, the speed was 6 m / min.
The feeding speed decreases to the minute and it takes 22 to feed the entire length.
It took a minute.

In the above-mentioned specific example, in the air flow communicating device described in FIG. 1, the meandering detecting portion is formed in an arc shape with a radius of 30 mm,
A recess having an edge interval (L) of 32 mm was provided, and an optical sensor was used at a position where the depth (D) in the recess was 5 mm.

When it is detected that the wire rod is coming into the optical sensor unit, the wire rod feeding speed is reduced, and when the wire rod does not enter for 1 minute, the wire velocity is controlled so as to increase the wire rod feeding speed. As a result, the linear velocity at the start of the transmission was 20 m / min, while the linear velocity at the time of 300 m pressure feeding was 13 m / min, which was higher than that of the comparative example, and the entire length was able to be transmitted. At this time, it was confirmed that the wire rod was meandering in the pipeline near the inlet of the air flow communication device at a pitch of 12 to 15 cm, which is not problematic in mechanical strength and pumping performance. Three
The time required for the 00 m feeding was 13 minutes, and the feeding time could be greatly shortened compared to the comparative example.

Further, in the comparative example, since the curved pipe portion is curved, the length is 12 cm and the width is 7 cm.
Occupying the section, and the pipe line continues from this point and protrudes in a direction away from the axis of the air flow communication device, which requires a large construction space. On the other hand, in the present invention, it is only necessary to place a section of the meandering detection unit of about several cm in the middle of the air flow communication device, which is advantageous in terms of construction space.

FIGS. 6 to 8 are schematic configuration diagrams of another example of the embodiment of the air flow communication device of the present invention and the air flow communication method using the same.

FIG. 6 is a schematic configuration diagram of the air flow communication device, which has the same configuration as that of FIG. In the figure, the same parts as those in FIG. Reference numeral 17 is a mechanical switch. The figure shows the schematic arrangement of the internal mechanism as seen from above, but in using this device, as shown in the figure, the feeding roller 6 and the pressure contact roller in contact with it are arranged horizontally. It may be used in a posture, or may be used in a posture in which the feeding roller 6 and the pressure contact roller contacting the feeding roller 6 are vertically arranged. In this example, the wire rod feeding part, the meandering detecting part, and the air flow supplying part in FIG. 1 are integrally configured. Of course, you may make it divide | segment as appropriate and may be comprised. Further, although the seal is provided only on the introduction side of the wire rod 1, as described in FIG.
Both secondary and secondary seals may be used.

FIG. 7 shows an example of the mechanical switch. In the figure, 17 is a mechanical switch, 18 is a sensing unit, 19, 20
Is a terminal. Inside there is a contact part consisting of a fixed contact and a movable contact not shown, and normally the contact part is in contact,
The terminals 19 and 20 are in the ON state. Sensor 18
When a force in the direction of the arrow is applied to the
It is in the OFF state for 20 minutes. The sensing unit 18 may directly constitute the movable contact, or the sensing unit 18 may operate the movable contact. Since a commercially available micro switch operates a contact part by a sensing part to perform an ON / OFF operation, a micro switch can be used as the mechanical switch 17.

FIG. 8 shows an example of a circuit using a mechanical switch. In the figure, 17 is a mechanical switch,
20 is a terminal, 21 is a fixed contact, 22 is a movable contact, and 23 is a motor. The motor 23 drives the feed roller via a speed reduction mechanism. A mechanical switch 17 is interposed between the motor 23 and the power source. The movable contact 22 of the mechanical switch 17 separates from the fixed contact when the force in the arrow direction is applied to the sensing unit 18 described in FIG. 7, and the terminals 19 and 20 are turned off.

In FIG. 6, the wire rod 1 fed by the driving of the feed roller 6 and carried on the air flow 12 and fed to the conduit 5 is meandered, and the mechanical switch 17 is actuated.
When the terminals 19 and 20 are turned off, the motor 23 stops. When the continuous supply of the airflow 12 eliminates the obstacle in the wire rod 1 feeding state, the meandering state disappears, and the force applied to the sensing portion 18 of the mechanical switch disappears. Since the restoring spring force acts on the sensing portion 18 of the mechanical switch 17, the movable contact 22 comes into contact with the fixed contact 21, the terminals 19 and 20 are turned on, and the motor 23 is driven again. , The feed roller 6 is rotated, and the wire 1
Will be resumed.

In this embodiment as well, it goes without saying that other types of detecting means can be adopted in place of the mechanical switch, but the mechanical switch has a simple structure and is highly reliable. There is an advantage that can be realized.

Incidentally, it is possible to delay the recontact of the contacts by providing a damping mechanism to the return spring of the mechanical switch or electrically adding a delay characteristic. When a time delay is given, after the meandering is detected and the feeding is stopped, when the wire rod advances by the air flow and the mechanical switch is turned on, the feeding is not restarted immediately and there is a time delay. In addition, when the meandering state is removed more completely, the feeding of the wire is resumed, so that the meandering state is less likely to occur thereafter, and as a result, it is possible to carry the wire in a shorter time.

In the above-described embodiment, the concave portion of the meandering detecting portion is provided at one place, but it may be provided at a plurality of places. In that case, a plurality of sensors having different detection sensitivities may be provided, or a plurality of sensors having the same detection sensitivity may be provided at different portions in the circumferential direction of the passage. Further, the recess may be provided so as to surround the entire circumference of the passage, and the detection means may be provided at a plurality of locations.

[0039]

As is apparent from the above description, according to the present invention, the air flow rate of the wire is maintained at the maximum speed that does not damage the wire, and the installation time is greatly shortened as compared with the prior art. You can In addition, the function of preventing meandering and enabling transmission can be realized in a small space, which is advantageous in terms of downsizing of equipment.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an example of an embodiment of an air flow communication device of the present invention.

FIG. 2 is an explanatory diagram of an example of a detection unit in FIG.

FIG. 3 is an explanatory diagram of an operation of the present invention.

FIG. 4 is an explanatory view of a recess according to the present invention.

FIG. 5 is an explanatory view of the operation of the conventional technique.

FIG. 6 is a schematic configuration diagram of another example of the embodiment of the airflow device and the airflow method using the same of the present invention.

FIG. 7 is an explanatory diagram of an example of a mechanical switch.

FIG. 8 is a circuit diagram of an example when a mechanical switch is used.

[Explanation of symbols]

1 ... wire rod, 2 ... wire rod feeding portion, 3 ... meandering detection portion, 4 ...
Air flow supply unit, 5 ... Pipe line, 6 ... Feed roller, 7 ... Primary seal, 8 ... Secondary seal, 9 ... Passage passage, 10 ... Recessed portion, 1
DESCRIPTION OF SYMBOLS 1 ... Compressed air supply port, 12, 13 ... Air flow, 14 ... Spring-like electrode, 15 ... Fixed electrode, 17 ... Mechanical switch, 18 ...
Sensing part, 19, 20 ... Terminal, 21 ... Fixed contact, 22 ... Movable contact, 23 ... Motor.

Claims (5)

[Claims] 1. A wire rod air-flowing device for feeding a wire rod into a duct and at the same time sending an air flow to feed the wire rod to the duct by means of a meandering detector near the duct side of the wire rod feed part. The meandering detection unit has a passage for the linear wire, a recess provided on the wall surface side of the passage, and a detection means for detecting that the wire meandered and entered the recess. An air flow device for wire rods. 2. A wire rod air flow communicating device according to claim 1, wherein a diameter of an arc including the front and rear ends of the recess and the detection point of the wire rod is larger than a bending diameter allowed for the wire rod. 3. A method for air flow of a wire rod, wherein a wire rod is sent together with an air flow into the pipe line, and the wire rod is sent to the pipe line by the air flow, in which a passageway having a recess is provided in a part of the pipe line through which the wire rod is sent. By detecting that the wire rod has entered the meandering detection point provided in the recess and controlling the feeding speed of the wire rod, the diameter of a circle including the three points of the front and rear ends of the recess and the meandering detection point is not less than A method of air flow of a wire, characterized in that the wire is sent while maintaining a bending radius of the wire. 4. A method for air flow of a wire rod, wherein a wire rod is sent together with an air flow to the pipe line and the wire rod is sent to the pipe line by the air flow, and a passageway having a recess is provided in a part of the pipe line through which the wire rod is sent. A method for feeding an air stream of a wire, characterized in that, when it is detected that the wire has entered a meandering detection point provided in the recess, the feeding operation of the wire is stopped. 5. The feeding operation of the wire is restarted after the wire is removed from the meandering detection point provided in the recess by the progress of the air flow of the wire.
The air flow method of the wire rod described in.