JPH06100149A - Spool automatic reversing device - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the time required for repeated spool inversion operation. [Structure] Four sets of holder members 21 to 24 are axially arranged around the central axis 10. Spool reversal is completed simply by rotating the central shaft 10 90 degrees, and there is no need to return it in the opposite direction. The spools can be loaded and unloaded simultaneously from different holder members.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spool automatic reversing device, which is used, for example, in a process of reversing a spool in which a welding wire is wound from an upright state to a laterally placed state and feeding it into a conveyor. sell.

[0002]

2. Description of the Related Art For example, a welding wire currently shipped as a product is wound around a spool and is 20 K each.
It has a weight of about g. The outside of the spool is wrapped with a film. In a manufacturing line through which a spool around which a welding wire of this kind is wound is passed, each spool is placed on a belt conveyor and conveyed between processes. By the way, when carrying a spool on a belt conveyor, in order to secure stability during movement and prevent damage from occurring,
The spool is placed on the conveyor in a stable horizontal state, that is, in a state where the direction of the rotation axis of the spool is perpendicular to the surface of the conveyor. However, for example for packaging
In the step of winding the film on the outside of the spool, it is necessary to put the spool in an upright state, that is, in a state in which the direction of the rotation axis of the spool is oriented horizontally, and then to the step, and the next step At the time of carrying in, it is necessary to invert the spool from the standing state to the horizontal state again.

Therefore, in this type of production line,
Work to reverse the spool from the horizontal state to the standing state,
It is necessary to invert the spool from the upright position to the horizontal position. The prior art of an apparatus capable of automating such a spool reversing work is described in, for example, Japanese Utility Model Laid-Open No. 57-126425.
Japanese Patent Publication No. 57-131524 and Japanese Utility Model Publication No. 57-131524.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the inversion device shown in Japanese Patent No. 26425, a holder (L-shaped arm) supporting an inversion object (bobbin or spool) is rotated by about 90 degrees, so that the inversion object supported thereby is rotated. It is turned over and sent to the next process.

On the other hand, in an actual production line, a large number of spools are continuously supplied in sequence, so that even in the mechanism for reversing the spools, it is necessary to repeat the reversing work of each spool. is there. Therefore, in the conventional spool reversing device, when one spool is loaded into the holder, the holder is rotated, for example, 90 degrees in the clockwise direction, and after the spool is taken out from the holder, the holder is reversed. After rotating 90 degrees clockwise and returning to the original position, the next spool is received in the holder, and the holder is rotated 90 degrees clockwise again. Such an operation is repeated.

However, in this type of spool reversing device, it takes a considerable time to invert one spool. That is, to carry out one inversion cycle,
At least, it is necessary to sequentially receive the spool into the holder, rotate the holder 90 degrees clockwise, take out the spool from the holder, and rotate the holder counterclockwise 90 degrees. These are difficult to carry out in a short time, since the next reversal cycle can only be started after the reversal cycle has been completely completed. For example, if the drive source for rotating the holder and the drive source for loading and unloading the spool are increased in size to increase the drive speed, each operation can be simply sped up. However, the effect of shortening the reversal time is small although the size of the entire device is increased.

However, if the reversing operation of each spool takes a long time, a large number of spools are made to stand by at the entrance of the reversing device, and the efficiency of the manufacturing line is lowered. It needs to be done in a short time. Therefore, it is an object of the present invention to provide a reversing device capable of repeating the spool reversing operation in a short time, and avoiding an increase in size of the device.

[0008]

In order to solve the above-mentioned problems, in the spool automatic reversing device of the present invention, a rotating shaft (10); coupled with the rotating shaft, and having an axial symmetry about the rotating shaft. A reversing mechanism (20), including at least three sets of holder members (21, 22, 23, 24) that are arranged in each of the plurality of holder members (21, 22, 23, 24) configured to freely receive and take out the spool (1) to be reversed; An axis is connected to the rotation axis, and a reversing drive means (30) is provided for driving the rotation axis in the same rotation direction by a predetermined angle of 90 degrees or more every time a predetermined instruction is given.

The holder member includes a flat surface portion (41),
It has a support part (42) and a guide part (43), and in said support part, it is arrange | positioned at one side of a plane part, and is extended in the direction perpendicular | vertical to a plane part with the length of about the diameter of a spool. Arms (42a, 42b, 42c) are provided at intervals from each other, and in the guide portion, guide members (43a, 43b, 43c) having a shorter length than the arm of the support portion are flat. Is arranged so as to extend from the other side of the part in a direction perpendicular to the surface thereof, and further at a position between a plurality of arms of the support part,
Belt conveyors (51, 52) are arranged.

Further, in the second aspect of the invention, a spool detecting means (61) for detecting that the spool has entered the inside of the holder member arranged at one end of the reversing mechanism at a predetermined position; and the detecting means. Further includes a control means (70) for issuing a drive command to the reversing drive means when detecting the entering of the spool.

The symbols shown in the above parentheses are the reference numerals of the corresponding elements in the embodiments described later, but each component of the present invention is a specific element in the embodiments. It is not limited to only.

[0012]

The reversing mechanism of the present invention includes at least three sets of holder members, and each of the holder members is a reversing target spout.
It is configured so that it can freely receive and take out the package. Further, these holder members are arranged around the rotation axis so as to be axially symmetrical.

Therefore, for example, in the case where four sets of holder members are displaced by 90 degrees and are arranged on the axis, the rotation axis is rotated by 90 degrees in the same direction, and the holder is moved to four predetermined positions.
The holder members of the set are respectively positioned. In other words, when the reversing drive means drives the rotating shaft by 90 degrees, the spool supported by one holder member moves together with the holder member by 9 degrees.
Since it turns 0 degrees, it is inverted to the horizontal state in the standing state and to the standing state in the horizontal state.

In this state, since the adjoining holder member is positioned at the inlet of the spool, that is, at the position before the turning of the holder member, the next spool member can be rotated without rotating the reversing mechanism in the opposite direction. Can be received in the holder member of the charging port. In other words, since a large number of spools can be sequentially reversed by simply rotating the reversing mechanism in the same direction by 90 degrees, in the present invention, as compared with the conventional reversing operation cycle involving the reciprocating motion of the holder. The reversal time is much shorter. Moreover, even before the removal of the spool from the holder member at the outlet is completed, the loading operation of the next spool to the holder member at the inlet can be started. Can be carried out at substantially the same time,
This helps reduce the time required for the reversing operation cycle.

The holder member provided in the reversing mechanism has a minimum of three.
All you need is a pair. That is, when the three sets of holder members are displaced by 120 degrees and arranged on the axis, the three sets of holder members are respectively positioned at three predetermined positions each time the rotation shaft is rotated by 120 degrees in the same direction. It In this case, when the reversing drive means drives the rotating shaft by 120 degrees, the spool supported by one holder member turns 120 degrees together with the holder member. It is inverted from the standing state to the horizontally placed state, slides down from the holder member by its own weight, and rides on the belt conveyor arranged below, for example, in the horizontally placed state.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the spool automatic reversing device will be described below with reference to the drawings. FIG. 4 shows a process of a part of a manufacturing line in which the reversing device of this embodiment is incorporated. This manufacturing process uses a welding wire wound spatter weighing about 20 kg.
It is configured to automatically apply the packaging to the outside of the rule 1.

The spun on which the welding wire was wound in the previous step
As shown in FIG. 4, the ruler 1A is conveyed in the direction of arrow A by the entrance side belt conveyor 2 in a horizontal state, and the stopper mechanism 3
After standing by at, the entrance side reversing device 4 reverses the state from the horizontal state to the standing state. In this embodiment, the entrance-side reversing device 4 uses a reversing mechanism, which is well known in the related art, in which a holder repeats reciprocating motion of 90-degree rotation.

The upright spool 1B is conveyed in the direction of arrow B on the belt conveyor 5 and stops at a predetermined position. At that position, the heat-shrinkable film FU from above and below, respectively.
And FL are supplied. These heat shrink films FU and FL are first adhered to the front of the spool 1B. When the spool 1B is pushed forward by the actuator driven by the air cylinder 6, the spool 1B is pushed forward.
A heat-shrinkable film FU and FL are packaged on the outer circumference of the heat-shrinkable film FU and FL, and the heat-shrinkable film FU and FL are then adhered to the rear of the spool to package the body and the heat-shrinkable film FU and FL The part is cut off.

A spout having a heat-shrinkable film mounted on the outer circumference.
The roll 1C is fed onto the chain conveyor 7 while rolling on the slope in the direction of arrow C, and is further conveyed by the chain conveyor 7 in the direction of arrow C. A tunnel 8 containing a heater is installed in a part on the chain conveyor 7, and when the spool 1C passes through the tunnel 8, the heat shrink film wound around the spool 1C shrinks. , And adhere to it so as to cover the surface of the spool 1C.

The spool 1 thus packaged is completed.
The output side reversing device 9 reverses D from the upright state to the horizontal state. The output reversing device 9 uses a special mechanism as described later in order to perform the reversing operation in a short time. Spool 1E that was placed horizontally again
Rides on the belt conveyor 50 and is conveyed in the direction of arrow D toward the next step.

The outlet reversing device 9 will be described in detail below. FIG. 3 shows a plan view of the vicinity of the exit side reversing device 9, and FIGS. 1 and 2 show a perspective view and a front view of the reversing mechanism 20 of the exit side reversing device 9, respectively. First, the reversing mechanism 20 will be described with reference to FIGS. 1, 2 and 3.

The reversing mechanism 20 includes four sets of holder members 21, 22, 23 arranged symmetrically with respect to the central axis 10.
And 24 are provided. 4 sets of holder members 21, 22,
23 and 24 have the same structure, and each holder member includes a flat surface portion 41, a support portion 42, and a guide portion 4.
It is composed of three. The support portion 42 is arranged on one side of the flat surface portion and includes three arms 42a, 42b and 42c extending in a direction perpendicular to the flat surface portion. A
The holes 42a, 42b, and 42c have a sufficient length that is about the diameter of the spool, and the spool in an inclined state or the one shown in FIG.
Like the holder member 21 shown in FIG. 1, it is possible to reliably support the spool in a horizontally placed state. Also, arm 4
2a, 42b and 42c are spaced from each other, and the belts 51 and 52 of the exit side belt conveyor 50 are arranged between the spaces through which the arms 42a, 42b and 42c pass. The guide part 43 is composed of claw-shaped guide members 43a, 43b and 43c having a shorter length than the arm of the support part. The guide members 43a, 43b, and 43c are arranged so as to extend from one side of the flat surface portion 41 in a direction perpendicular to the surface thereof, and the traveling direction of the spool that rolls in the standing state and enters the reversing mechanism 20 is located at a predetermined position. I will guide you to.

The central shaft 10 of the reversing mechanism 20 is rotatably supported, and a reversing drive mechanism 30 described later is connected to one end (right side of FIG. 1) of the center shaft 10. The central axis 10 is 1
Each time the spool 1 is driven to a predetermined position in one holder member (22 in FIG. 1), the spool 1 is rotated by 90 degrees. It turns around and is inverted to the horizontal position. The spool, which has been inverted and placed in the horizontal position, rides on the belts 51 and 52 exposed at a position slightly higher than the arms 42a, 42b and 42c of the holder member supporting the spool, so that the belt 51 and It is conveyed in the direction of arrow D by 52.

The external appearance of the reversing drive mechanism 30 for rotationally driving the central shaft 10 of the reversing mechanism 20 is shown in FIG.
FIG. 6 shows the internal structure of 0 and the device for controlling it. In this embodiment, the rotary drive is provided in the main part of the reversing drive mechanism 30.
A commercially available drive called an index drive is used. As shown in FIG. 5, the reversing drive mechanism 30 includes an electric motor 31, a ring-cone transmission 32, and an indexing mechanism 33, and an output shaft 34 has an inversion mechanism 20.
Is connected to the central axis 10.

The reverse drive mechanism 30 will be described with reference to FIG. The ring cone transmission 32 is a continuously variable transmission,
An input disc 81 connected to the drive shaft 31a of the electric motor, a plurality of planet cones 82 engaged with the input disc 81, a speed change ring 83 engaged with the outside of the planet cone 82, and a planet cone. A cam disk 84 that engages with the shaft 82, and the cam disk 84 is connected to the output shaft 34. When the speed change ring 83 moves in the directions of the arrows A1 and A2, the relative position between the speed change ring 83 and the planetary cone 82 changes, and the speed change ratio changes.

When the rod 85 connected to the piston in the cylinder 88 is moved in the axial direction, the pinion 86 meshed with the rack formed therein is rotated, and the movable portion 87 meshed with the pinion 86 is moved by the rod. Moves in the opposite direction of 85. The movable portion 87 is engaged with the transmission ring 83. Therefore, when the piston in the cylinder 88 is moved,
The gear ratio can be changed.

One end of the rod 85 is connected to one end of the lever 92 of the indexing mechanism 33. The lever 92 is swingably supported by a shaft 92a in the vicinity of its center, and a roller 93 is installed in a protruding shape at the other end. A disc-shaped cam plate 91 is connected to the output shaft 34, and four positioning grooves 91a are formed in the peripheral portion of the cam plate 91 at equal intervals, that is, every 90 degrees.
The roller 93 mounted on the lever 92 has a positioning groove 91.
can mesh with a. The rod of the cylinder 89 is also connected to the lever 92. A sensor S1 for detecting the position of the piston inside the cylinder 89 is installed.

Compressed air from the air source 101 is regulated in the two cylinders 88 and 89 by a filter 102 and a regulator.
Is supplied via a solenoid 103 and a solenoid valve 104. The control device 70 controls the on / off of the solenoid valve 104 and the on / off of the electric motor.
In fact, when the production line is in motion, the motor is always on and spinning at a constant speed. Then, the solenoid valve 104 is switched on / off and switched off / on once each time the spool inversion operation is performed. By this operation, 2
The pistons in the two cylinders 88 and 89 move, and the lever 92 swings. As the lever 92 swings, the output shaft 34 rotates by 90 degrees.

As shown in FIG. 6, when the roller 93 is engaged with the positioning groove 91a, the reduction ratio of the ring-cone transmission 32 is maximum, and at this time, the transmission torque is also extremely small, so The output shaft 34 does not move because it is stopped. By controlling the solenoid valve 104,
The lever 92 so that the la 93 is disengaged from the positioning groove 91a.
When is moved, the shift ring 83 moves to the arrow A2 side (high speed side). With this movement, the reduction ratio gradually decreases, and the transmission torque gradually increases up to a certain point. As a result, the output shaft 34 starts rotating, accelerates smoothly, and when it reaches a predetermined speed, it stably rotates at that speed.

When the control state of the solenoid valve 104 is switched after the output shaft 34 starts rotating, the roller 93
Is pressed against the peripheral surface of the cam plate 91,
Rotate with the 91. When the rotation amount approaches 90 degrees and the position where the positioning groove 91a exists reaches the position of the roller 93, the roller 93 enters the positioning groove 91a, so that the lever 92 moves and the transmission ring 83 moves. Move to the arrow A1 side (low speed side). With this movement, the reduction ratio gradually increases, so that the rotation speed of the output shaft 34 smoothly decreases. When the roller 93 is completely meshed with the positioning groove 91a, the reduction ratio becomes maximum, and the transmission torque is extremely small at this time, so that the contact stop state is established and the output shaft 34 stops.

That is, each time the control device 70 switches the solenoid valve 104 off-on-off, the lever 92 is turned on.
Oscillates once, mechanical acceleration / deceleration control is performed, and the output shaft 34 smoothly and accurately rotates by 90 degrees and stops.

In this embodiment, the timing for performing the reversing operation of each spool is based on the signal output from the sensor (limit switch) 61 which detects the movement of the contact plate 62 arranged at one end of the reversing mechanism 20. Have decided. That is, the spool is placed inside the holder member facing the spool loading port.
The sensor 61 outputs a spool detection signal every time the spool enters and hits the hit plate 62. Therefore, immediately after the spool detection signal appears, or after a predetermined time delay as necessary, The control device 70 is a solenoid valve 104.
The state is switched to start driving for inversion. With such simple control, the inversion operation can be accurately performed. Please refer to the example of the control timing shown in FIG. 7.

Since the indexing mechanism 33 incorporates a worm speed reducer, the output shaft 34 rotates relatively slowly. Actually, the repetitive cycle of the inversion operation is about 2
Set to seconds. However, the reversing operation can be repeated in a much shorter time than the reversing operation of the conventional device.

[0034]

As described above, according to the present invention, the plurality of holder members are arranged in axial symmetry with respect to the rotation axis, and each time the spool is inverted, the holder members are reversely rotated to the position before the inversion. It is not necessary to set the reversing mechanism in the same direction, for example 90
Since a large number of spools can be sequentially inverted only by rotating once, the reversing time required in the present invention is much shorter than that of the conventional reversing operation cycle involving the reciprocating movement of the holder.

After the reversing operation, the spool inlet,
That is, since the adjacent holder member is positioned at the position before the turning of the holder member, the next spool can be received in the holder member at the loading port without rotating the reversing mechanism in the opposite direction. That is, the spout from the holder member at the outlet
Even before the removal of the spool is completed, the loading operation of the next spool to the holder member at the loading port can be started,
Spool loading and unloading can be performed substantially at the same time, which is effective in shortening the time required for the reversing operation cycle.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of a reversing mechanism of an embodiment.

FIG. 2 is a front view showing the main part of the reversing mechanism of the embodiment.

FIG. 3 is a plan view showing the vicinity of the apparatus of the embodiment on the production line.

FIG. 4 is a perspective view showing a part of the manufacturing line.

FIG. 5 is a perspective view showing an appearance of a reversing drive mechanism.

FIG. 6 is a block diagram showing a reversing drive mechanism and a device for controlling it.

FIG. 7 is a time chart showing an example of control timing.

[Explanation of symbols]

1, 1A, 1B, 1C, 1D, 1E: Spool 2: Entry Side Belt Conveyor 3: Stopper Mechanism 4: Entry Side Reversing Device 5: Belt Conveyor FU, FL: Heat Shrink Film 6: Air Cylinder 7: Chain Conveyor 8: tunnel 9: exit side reversing device 10: central axis 20: reversing mechanism 21, 22, 23, 24: holder member 30: reversing drive mechanism 31: electric motor 31a: drive shaft 32: ring co-
Gearbox 33: indexing mechanism 34: output shaft 41: flat surface portion 42: support portion 42a, 42b, 42c: arm 43: guide portion 43a, 43b, 4
3c: Guide member 50: Belt conveyor 51, 52: Belt 61: Sensor 62: Contact plate 70: Control device 81: Input disc 82: Planetary cone 83: Shift ring 84: Cam disc 85: Rod 86: Pinion 87 : Moving part 88, 89: Cylinder 91: Cam plate 91a: Positioning groove lever 92 92a: Shaft 93: Roller 101: Air source 102: Filter 103: Regulator-
104: Solenoid valve sensor S1

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical indication location B65G 47/90 D 8010-3F (72) Inventor Yutaka Kurose 7-6 Higashi Narashino, Narashino, Chiba Prefecture No. 1 Narashino Factory of Nittetsu Welding Industry Co., Ltd.

Claims (2)

[Claims] 1. A rotary shaft; at least three sets of holder members that are coupled to the rotary shaft, are arranged axially around the rotary shaft, and are each configured to freely receive and take out the spool to be reversed. A reversing mechanism including a reversing mechanism; and a reversing driving means for driving the revolving shaft in the same rotation direction by a predetermined angle of 90 degrees or more each time a drive shaft is connected to the revolving shaft and a predetermined instruction is given. -Le automatic reversing device. 2. A spool detecting means which is arranged at one end of the reversing mechanism and detects that the spool has entered the inside of the holder member at a predetermined position; and the detecting means detects the entrance of the spool. The spool automatic reversing device according to claim 1, further comprising: a control unit that sometimes issues a drive command to the reversal driving unit.