JP2542668B2 - Groove abnormality detection device for long resin molding having spiral groove - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a groove abnormality detecting device for a long resin molding having a spiral groove, and more specifically, it relates to a spiral spacer of an optical fiber cable, for example. The present invention relates to a groove abnormality detecting device for detecting an abnormality in a spiral groove of a long resin molded product while the resin molded product is running.

<< Prior Art >> Generally, the groove abnormality detecting device of the above-mentioned type is the third one.
It has the entire structure as shown in the figure.

That is, the groove abnormality detecting device 1 is provided on a support base 3 arranged between a pair of take-up machines 2, 2 provided in the middle of a manufacturing process of a long resin molded product, for example, a spiral spacer s,
A detector body 6 having an opening 4 through which the spiral spacer s is inserted and a pin 5 that fits into the spiral spacer s; and a flexible support member 7 that rotatably supports the detector body 6.
It has a strain gauge 8 attached to the support member 7, and includes a detection circuit (not shown) for detecting the deflection of the support member 7 and detecting the abnormality of the spiral groove based on the degree of the deflection. is there. In the groove abnormality detecting device 1, when the spiral spacer s is run while the pin 5 is fitted in the spiral groove, the running resistance of the pin is small when the groove is accurately finished. When the depth of the groove is shallow or narrow, or when there are minute bumps or protrusions in the groove, the running resistance increases, and as a result, the support member 7 bends. The deflection was detected by the strain gauge, and when the value was equal to or larger than a predetermined value, it was determined that the groove was abnormal.

<Problems to be Solved by the Invention> However, in the above-described conventional groove abnormality detecting device, when the spiral groove of the spiral spacer has an extremely narrow width portion or a shallow depth portion, With excessive load, the deformation of the support member becomes large and the strain gauge is damaged,
Further, there is a problem that the support member itself is plastically deformed and damaged when a large load is applied. In addition, since the strain amount-load relationship changes depending on the weight of the detector main body that is changed according to the number of grooves of the product type to be manufactured, and the 0 point of the strain gauge cannot be checked while the spiral spacer is running,
There is also a problem that the running resistance cannot be accurately grasped. Furthermore, since the strain gauge is directly attached to the support member 7 using an adhesive, a zero-point drift (fluctuation in reference voltage) may occur due to the influence of external factors such as atmospheric temperature and air flow. is there.

Therefore, the present invention is capable of preventing damage to a load detector such as a strain gauge and a supporting member, and at the same time, a long resin molded product having a spiral groove capable of accurately detecting an abnormality of a groove by running resistance. A first object of the present invention is to provide a groove abnormality detecting device.

The present invention also provides a groove abnormality detecting device for a long resin molded product having a spiral groove, in which zero-point drift is unlikely to occur due to the influence of external factors such as atmospheric temperature and air flow. The purpose is 2. An object of the present invention is to provide a groove abnormality detecting device for a long resin molded product having a spiral groove.

<< Means for Solving the Problem >> The present invention is a groove abnormality detecting device for detecting an abnormality of a spiral groove in a running state of a long resin molded product having a spiral groove, and a guide rail extending linearly. A supporting member slidably provided on the guide rail, a detector main body rotatably supported by the supporting member, and a magnetic attraction means that separates when a force of a predetermined value or more is applied to the supporting member. And a load detector coupled via, the detector body is formed with an opening through which the long resin molded product is inserted, and around the opening, the long resin molded product is formed. A pin having a shape corresponding to the shape of the spiral groove and having a tip portion that fits into the spiral groove of the long resin molding that projects into the opening and travels in the opening is arranged. It is characterized by.

<< Operation and Effect of the Invention >> In the groove abnormality detecting device of the present invention, the traveling resistance of the detector main body is transmitted to the support member which can slide on the horizontal guide rail as the groove abnormality detecting means, and further, The force is transmitted to the load detector through the magnetic attraction means,
Moreover, since the acting force and the magnetic attraction force at the time of abnormality are adjusted so that the detector main body side comes off during an overload, damage to the detector main body side and the load detector can be prevented.

If a load cell in a sealed state is adopted as the load detector instead of the conventional structure in which a strain gauge is simply attached to a support member, an abnormality can be detected without being affected by external factors such as temperature.

<Example> Hereinafter, a groove abnormality detecting device for a long resin molded product having a spiral groove according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a perspective view showing a groove abnormality detecting device 10 according to an embodiment of the present invention. The groove abnormality detecting device 10 has a guide rail 11 extending linearly. A support member 12 is slidably provided on the guide rail 11, and the support member 12 is supported by the support base 13 slidably provided on the guide rail 11 and the support base 13. And has a vertical support plate 14 extending vertically upward.

On the upper part of the vertical support plate 14, a disc-shaped detector body 15 is supported via a bearing 16 so as to be rotatable about a horizontal axis. In the center of the detector main body 15, a spiral spacer s, which runs between a pair of take-up machines 2 provided in the middle of the manufacturing process of the spiral spacer s, as shown in FIG. 3, is inserted. An opening 17 is formed.
Around the opening 17 of the detector body 15, a spiral spacer s
The number of pins 18 corresponding to the number of spiral grooves provided in the pin 18 is arranged. The tip of the pin 18 is formed in a shape corresponding to the shape of the spiral groove to be detected, that is, the tip and the wall of the spiral spacer s forming the spiral groove are in close contact with each other without limit. It is arranged so that it is in a state close to. Further, it is desirable that the pin 18 be provided so as to be movable in the radial direction of the detector main body 15 so as to cope with the change in the depth of the spiral groove.

A load cell 19 in a sealed state for changing the magnitude of the load to the magnitude of an electric signal is arranged on the side of the guide rail 11 and near the support member 12. As is well known, a representative load cell 19 is a strain gauge type strain gauge and a strain gauge column connected to the strain gauge type is contained in a case. Is adopted.

The load cell 19 and the support base 13 are connected by a connecting member. The connecting member is composed of a first portion 21 fixed to the support base 13, a second portion 20 fixed to the load cell 19, and a permanent magnet 22 attracted to 20 and 21. When there is an abnormality in the groove, the running resistance with the detector main body increases, and a horizontal force is applied so that the support 13 slides on the guide rail 11 toward the downstream side, and the fixed first portion is applied. 21, through the permanent magnet 22, the second portion 20,
Arrow A indicating the traveling direction of the spiral spacer s on the load cell 19
A load parallel to is transmitted.

The first portion 21 is attracted by the permanent magnet 22 to the side portion on the downstream side in the traveling direction of the spiral spacer s indicated by the arrow A, while the second portion 20 is also a metal that can be attracted by the permanent magnet 22. Are formed so that the first portion 21 and the second portion 20 are joined together. The attraction force of the permanent magnet 22 is set to a value such that the first portion 21 pushes the permanent magnet 22 when the force of a predetermined value or more is applied to the detector body 15 to separate the coupling.

As shown in FIG. 2, a recording circuit 25 and a display 27 are connected to the load cell 19 via an amplifier 24. The recording circuit 25 is a detector of the spiral spacer s from the load cell 19. The output signal indicating the insertion resistance in the main body 15 is continuously stored, and the value is displayed on the display 27. Also, the bottom of the amplifier 24
An indicator 27 is connected via the peak circuit 26, and the indicator 27 displays the maximum value and the minimum value of the running resistance within a predetermined time. On the display 27, it is desirable to convert the voltage into a load value and display it so that the load applied to the load cell 19 can be seen at a glance. A digital comparator 28 is connected to the display 27, and the digital comparator 28 compares the insertion resistance signal at each moment with a predetermined dangerous value, and when the value of this signal is larger than the dangerous value, An alarm 29 is used to issue an alarm, and at least the downstream side of the pair of take-up machines 2, 2 as shown in FIG. 3 is stopped. As shown in FIG. 1, the stop of the take-up machines 2 and 2
A limit switch 30 may be provided on the guide rail 11 so as to be executed when the support table 13 touches it.

In the groove abnormality detecting device 10 having the above-described configuration, when the spiral spacer s is run while being inserted into the opening 17 of the detector body 15, the spiral spacer s has a wall of the spiral groove,
By the insertion resistance based on the sliding contact with the pin 18 of the detector body 15 that fits in the spiral groove, the detector body 5 is converted into the rotational force of the detector body under normal conditions, and the detector body 5 together with the support base 13
A horizontal force acting to move on the guide rail 11 in the direction of arrow A acts. The load cell 19 is an arm-shaped fixed part in which the force applied to the detector main body 15, that is, the support base 13, is arm-shaped.
21, transmitted to the fixed part 20 via the permanent magnet 22,
The compression and tensile forces applied to the strain column of the load cell 19 connected to the fixed portion 20 are detected and converted into an electric signal for output. Based on the output signal of the load cell 19, the state of the spiral groove of the spiral spacer s is monitored to detect an abnormality.

When the spiral groove is extremely abnormal, the insertion resistance becomes extremely large. At that time, the insertion resistance force exceeds the attraction force of the permanent magnet 22, and as a result, the permanent magnet 22 moves to the second Since it moves away from the portion 20 in the direction of arrow A, parts such as the support members 14 and 12, the detector main body 15 and the load cell 19 are not damaged.

[Brief description of drawings]

FIG. 1 is a perspective view of a groove abnormality detecting device according to an embodiment of the present invention, FIG. 2 is a block diagram showing an example of a processing circuit of an output signal of the load cell shown in FIG. 1, FIG. 3 and FIG. FIG. 1 is a diagram for explaining a conventional groove abnormality detecting device for a long resin molded product having a spiral groove. 10 …… Groove abnormality detection device 11 …… Guide rail, 12 …… Supporting member 15 …… Detector body, 16 …… Bearing 17 …… Opening, 18 …… Pin 19 …… Load cell (load detector)

Claims (2)

(57) [Claims] 1. A groove abnormality detecting device for detecting an abnormality of a spiral groove in a running state of a long resin molded product having a spiral groove, wherein a guide rail extending linearly and sliding on the guide rail. Load detection that is coupled via a support member that is movably provided, a detector body that is rotatably supported by this support member, and a magnetic attraction means that separates when a force of a predetermined value or more is applied to the support member. And an opening through which the elongated resin molded product is inserted is formed in the detector body, and a periphery of this opening corresponds to the shape of the spiral groove of the elongated resin molded product. A spiral groove having a shape and having a tip portion protruding into the opening and fitted into the spiral groove of the long resin molded product running in the opening is arranged. A groove abnormality detection device for a long resin molded product. 2. The groove abnormality detecting device for a long resin molded product having a spiral groove according to claim 1, wherein the load detector is a sealed load cell.