JPS6219651Y2 - - Google Patents

Description

[Detailed description of the invention] This invention was developed to automatically control the tape feeding speed in a tape winding machine that wraps tape around the outer circumference of a cable core such as an optical fiber cable. The present invention relates to an improvement in a detection device for detecting displacement of a tape tension control arm provided in a tape tension control arm.

In explaining this invention, first a conventional tension detection device for a tape winding machine or the like will be explained based on FIGS. 1 and 2.

In FIG. 1, reference numeral 1 denotes a hollow main shaft, which is rotatably supported by a frame 3 through bearings 2 and 2', and is driven by a main motor 25. As shown in FIG. Reference numeral 4 denotes a hollow shaft concentric with the main shaft 1, and is rotatably supported with respect to the main shaft 1 by bearings 6, 6'. A tape reel 5 is fixed to the hollow shaft 4 with side plates 8, 8' and a nut 9. 7 is a gear provided at the end of the hollow shaft 4, 1
0 is a disc-shaped frame that is integrated with the main shaft 1.

Further, 12 and 32 are guide rollers attached to the frame 10, 11 is an entry guide roller,
33 is a guide roller attached to a tension control arm (hereinafter referred to as control arm) 36, which will be described later. A gear 13 meshes with the gear 7, and is connected to a gear 16 via a shaft 14. The shaft 14 is a bearing 1 incorporated in the frame 10.
It is rotatably supported by 5. Reference numeral 34 denotes an internal gear that meshes with the gear 16. A belt 39 is installed on the outer periphery of the internal gear 34, and the internal gear 34 is rotatably supported by the frame 10 by a bearing 35. The control arm 36 has the aforementioned guide roller 33 at its tip, which is fixed to a belt pulley 37, which is rotatably supported on the main shaft 1 by a bearing 87.

Next, the structure for driving the tape reel 5 to feed out will be explained. Reference numeral 38 denotes a belt that engages with a belt pulley 39, one of which engages with a belt pulley 40, and a shaft 41 of the belt pulley 40 is rotatable by bearings 42, 42'. 43 and 44 are a group of reversing gears. Further, the gear 44 is directly connected to a first shaft 46 of a differential gear device 45. 47 is a belt wheel directly connected to the second shaft 48 of the differential gear device 45. A belt 30 connects a belt pulley 47 and a belt pulley 49 attached to the main shaft 1. A gear 51 is fixed to the casing 50 of the differential gear device 45, and is engaged with a gear 52 directly connected to the output shaft of the tape reel drive motor 53.

Next, the structure of devices related to the control arm 36 will be explained.

First, the device for detecting the displacement of the control arm 36 will be described. Reference numeral 54 is a belt that engages with the belt pulley 37, and the detection shaft 56 of the displacement detector 55
It engages with a belt pulley 57 attached to the. The detection shaft 56 is rotatably supported by a bearing 59 supported by a displacement detector storage casing 58.

Further, the casing 58 is rotatably supported at appropriate positions on the frame 3 by bearings 60 and 60', and a belt pulley 61 and a belt 62 are provided at the end of the casing.
It is designed to be driven by a belt pulley 63 attached to the main shaft 1 via.

Next, in the tape tension control device 65 using the control arm 36, the belt pulley 64 rotatably supported by the casing 68 of the control device 65 is engaged with the belt 54.
In other words, the belt pulleys 57 and 64 are interlocked via the belt pulley 37 and the belt 54.

The tension control device 65 has bearings 66, 6
It is rotatably supported on the frame 3 by 6'. Further, the belt pulley 67 provided at the end of the tension control device 65 is engaged with the same belt as the belt 62 that engages with the belt pulley 61. In other words, the belt pulley 67 is the belt pulley 6 attached to the main shaft 1.
3.

Furthermore, the structure of the tension control device 65 will be explained below based on FIGS. 2 and 3.

68 in FIG. 2 is a casing with a bearing 66,
66', it is rotatable. Further, the shaft 69 of the belt pulley 64 is rotatably supported by a bearing 70 supported by the casing 68. A bevel gear 71 is provided on the shaft 69 and is adapted to engage with a bevel gear 72 .

A shaft 73 of the bevel gear 72 is rotatably supported by a bearing 74 supported by the casing 68, and has a gear 75 at one end. The gear 75 is engaged with a gear 76, the shaft 77 of which is rotatably supported by a bearing 78, and has a lever 79 at one end of the shaft. A tension spring 80 is attached to this lever 79.
is engaged, and one end of this spring is engaged with the shaft 81.

Since the shaft 81 can move relative to the case 68 in the direction of the rotation axis, it is configured to rotate at the same rotation speed as the case 68 in the rotation direction. One end of the shaft 81 has a rotary bearing 82 that receives an axial load, and this rotary bearing 82 is held by a casing 83. The casing 83 is connected to a shaft 85 of a linear actuator 84. This linear actuator 84 electrically displaces the shaft 85 in the direction of arrow A in FIG.
The shaft 81 rotates at the same rotation speed as the casing 68, and the shaft 85 does not rotate. This is due to the mechanical action of displacing the spring 80 and displacing the spring load through the operation of the linear actuator 84.

This tensile force of the spring 80 is converted into rotational torque of the gear 76 in the direction of arrow B by the lever 79 as shown in FIG.
Rotating torque in the direction of arrow C shown in FIG. In other words, torque in the direction of arrow C is always generated on the casing 68. By changing the displacement of the spring 80 in this way, the torque can be changed freely. This means that the torque can be changed automatically by operating the linear actuator 84 shown in FIG. means.

Note that the displacement of the linear actuator 84 is detected by the potentiometer 86.

Tape reel 5 constituting the tape winding device
The extension control drive system operates as follows.

That is, as shown in FIGS. 2 and 3 above,
The rotational speed ratio of belt wheel 39 and gear 44 and the rotational speed ratio of belt wheels 49 and 47 are made equal, and the ratio is set to _i1 . Further, the rotation speed of the gear 44 is N ₁ , the rotation speed of the belt wheel 47 is N ₂ , and the gear 5 of the casing 50 is
If the number of rotations of 1 is N ₃ , then according to the principle of general differential gearing, N ₁ + N ₂ = 2N ₃ , therefore, N ₁ = 2N ₃
−N ₂ .

Further, the rotation speed of the belt pulley 39 is determined by the reversing gear 43,
Since it is driven by 44, it is expressed as a minus, and -
Since i ₁ N ₁ , −i ₁ N ₁ = −(2N ₃ −N ₂ )i ₁ .

Here, the rotational speed of the main shaft 1 is i ₁ N ₂ , and the relative speed of the belt pulley 39 with respect to the main shaft 1 is i ₁ N ₂ −(−i ₁ N ₁ ), so i ₁ N ₂ +(2N ₃ −N ₂ ) i ₁ = 2N ₃ i ₁ .

That is, regardless of the rotational speed of the main shaft 1, the relative rotational speed of the belt wheel 39 with respect to the main shaft 1 is the same as that of the gear 51.
It is proportional to the rotation speed of the motor 53, and also proportional to the rotation speed of the motor 53. Therefore, the hollow shaft is rotated via the gears 16, 13, and 7, and the tape reel 5 is rotated at the same time. It can be seen from this that the speed at which the tape is fed depends on the number of rotations of the motor 58, regardless of the rotation of the main shaft.

Furthermore, as shown in FIG. 1, the tape fed out from the tape reel 5 passes through a guide roller 32, a control arm guide roller 33 and guide roller 12, and an entry guide roller 11.
The cable is supplied to the cable, and this cable advances in the direction of arrow D by a winding device (not shown) or the like. Further, the control arm 36 swings within the range indicated by the arrow ho in the arrow b.

This oscillation is for controlling the feeding speed of the tape, and the oscillation displacement is detected by a displacement detector 55.

On the other hand, the rotational speed ratio of the belt pulleys 37 and 57 and the rotational speed ratio of the belt pulleys 63 and 61 are completely equal, and the ratio is defined as i ₂ . If the rotational speed of the main shaft 1 is Nm, the rotational speed of the displacement detector 55 is i ₂ Nm
becomes. That is, since the main shaft 1 rotates in the same direction and at the same rotation speed as the displacement detector 55, there is no change in the phase between the displacement detector main body 55 and the detection shaft 56. Here control arm 36
is displaced by Δt at a speed of ΔN relative to the main shaft 1, the detection shaft 56 rotates by Δt(Nm+ΔN)i ₂ , and the detector main body 55 rotates by ΔtNmi ₂ during that time. Therefore, the phase difference is △t(Nm+△N)i ₂ −△
tNmi ₂ =△t△Ni ₂ . That is, when the control arm 36 is displaced by △t△N with respect to the main axis, the displacement detector 55 is displaced by △t△Ni ₂ , but since △t△N is an angular change, this can be expressed as W ₁
Then, the displacement detector 55 is displaced by W ₁ i ₁ .
From now on, the phase difference between the control arm 36 and the main shaft 1 becomes the phase difference of the displacement detector 55 with a proportional value.

The phase difference signal is extracted to the outside by a slip ring 92 attached to the displacement detector 55.

Next, tape tension is generated by the torque of the control arm 36, that is, the reaction force, and the tape tension control device 65 generates this reaction force.
As already explained based on FIGS. 2 and 3, the action of the third
Torque in the direction of arrow C shown in the figure is always generated, and its value is proportional to the tensile load of the spring 80.

Also, the speed ratio of belt wheels 37 and 64 and belt wheel 6
Since the speed ratios of 3 and 67 are completely equal,
Similar to the displacement detection device described above, the displacement of the casing 6 is proportional to the displacement of the control arm 36.
8 and the belt pulley 64, the torque becomes the tension of the belt 54, and the belt pulley 37 in FIG.
can be conveyed to. That is, a relative torque is generated between the main shaft 1 and the belt pulley 37. Therefore, a reaction force is generated in the control arm 36 in the direction of the arrow.
This reaction force is balanced with the tape tension,
In other words, a tape tension corresponding to this reaction force is generated.

The displacement detector used in the conventional device has a thin shaft 56, as shown in FIG. 1, and is built into the displacement detector body. Since the slip rings 92 are arranged around the cylindrical outer periphery, they are easily affected by centrifugal force, so the conventional displacement detection device described above is constructed to reduce this effect.

On the other hand, the displacement detection device according to the present invention is characterized in that the displacement detector is arranged concentrically with the main shaft of the tape winding machine in order to further reduce the influence of this centrifugal force.

An embodiment of the tape tension detection device of this invention will be described below with reference to FIGS. 4 to 6 of the accompanying drawings.

Note that in FIGS. 4 to 6, parts given the same reference numerals as in FIGS. 1 to 3 described above have the same configuration and function.

In FIG. 4, 36 is a tension control arm, and 37 is its belt pulley. This belt pulley 37 is connected to a tension control device 68 by a belt 54, as in the prior art.
Reference numeral 100 is a main body of a displacement detector, and the detection axis of the detector is arranged concentrically with the main axis 1.

With this idea, the detection axis of the displacement detector 100 is
The first reason for arranging them concentrically is that the influence of centrifugal force due to rotation of the main shaft is minimal. Also the second
As shown in FIG. 1, the displacement of the control arm 36 can be directly detected, rather than indirect detection via conductive elements such as belts 54 and 62, and this eliminates errors in the conductive elements. This increases detection accuracy and ultimately leads to more precise tape feeding speed accuracy.

Reference numeral 101 is a slip ring for extracting an electric signal from the displacement detector 100. This invention is characterized in that a displacement detector is disposed coaxially with the main shaft 1 of a tape winding machine or the like in order to achieve the above effect.

5 and 6 show the structure of the displacement detector, and in the figure, 110 is the displacement detector 1.
10 is an inner detection cylinder, and 111 is an outer cylinder. This outer cylinder 111 is connected to the inner cylinder 111 by bearings 112 and 112'.
It can be rotated freely. and inner cylinder 110
A hole larger than at least the size into which the main shaft 1 fits is formed in the center of the hole. Therefore, the displacement detector 100 can be placed coaxially with the main shaft 1,
The feature of this invention is that the holes are formed to provide such a structure.

Next, a method for extracting a displacement detection signal using this displacement detector 100 will be explained with reference to the figure. 113 is a resistor, and 120 is an insulating end portion of the resistor 113. 114 is a slip ring and resistor 113
One end thereof is electrically connected to this slip ring 114 at 115. 116 is a resistor 113
117 is a brush that moves around the side of the slip ring 114.
Further, 118 and 120 are brackets attached to the inner cylinder 110, and 119 and 121 are signal output terminals. Further, 122 and 123 are rotating shafts, 124 is a brush 116 as a resistor, and 125 is a rotary shaft.
are springs for bringing the brushes 117 into contact with the slip rings 114, respectively. In the displacement detector 100 having such a structure, the outer cylinder 111 is connected to the inner cylinder 11.
When the displacement is made with respect to 0, the electrical resistance from the brush 116 to the slip ring 114 changes, and this changed electrical resistance is transferred to the signal output terminal 119,
121. brush 116,
117 is supported by shafts 122 and 123 so that the contact pressure does not change due to the centrifugal force caused by the rotation of the main shaft 1.

The tape tension detection device of this invention is characterized by arranging the displacement detector coaxially with the main shaft as described above.This eliminates the influence of centrifugal force due to the rotation of the main shaft, and also measures the displacement of the control arm electrically. It can be directly detected as resistance.

In the above description, a case has been described in which the tension displacement during tape feeding is extracted as a resistance change, but it is also possible to extract it as an electrical signal or an optical signal.

In addition to tapes, this invention can also be applied to devices for wrapping linear bodies such as cables.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the structure of a conventional tape winding machine, Fig. 2 is an explanatory diagram of the tension control device, Fig. 3 is a plan view taken along line A-A in Fig. 2, and Fig. 4 is an explanatory diagram showing the structure of a conventional tape winding machine. An explanatory diagram showing the structure of a tape winding machine in which a displacement detector of the invention is installed, FIG. 5 is an explanatory diagram showing the structure of the displacement detector of this invention, and FIG.
FIG. 3 is a plan view cut along line A-A in the figure. DESCRIPTION OF SYMBOLS 1...Main shaft, 5...Tape reel, 36...Tension control arm, 65...Tape tension control device, 100...Displacement detector, 101...
...Slip ring, 113...Resistor, 116,
117...brush, a...tape.

Claims (1)

[Scope of utility model registration request] In a type of tape winding machine, etc., a reel for feeding or winding tape or cable, which is rotatably provided on a hollow main shaft driven by a main motor, is driven and rotated by a reel drive motor.
When a tension control arm is provided coaxially movable relative to the main shaft and its displacement is electrically detected to control the feeding speed of the tape, etc., the detector for detecting the displacement of the tension control arm is 1. A tape tension detection device for a tape winding machine, etc., characterized in that a hole larger than at least the diameter of the main shaft is formed in a central shaft portion, and the main shaft is fitted into the hole substantially coaxially.