JP3187233B2 - Automatic beam attachment / detachment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a beam automatic attachment / detachment device for automatically attaching / detaching a beam in a delivery device or a winder.

[0002]

2. Description of the Related Art Conventionally, when a beam is manually attached to a delivery device or a winder, after centering to position the beam on the axis of a pair of holding shafts facing on the same axis, for example, holding the beam on the driven side The beam is chucked between the two axes by moving the shaft while pushing it by hand, and after the chucking of the beam is completed, stop pushing the holding shaft by hand and clamp the holding shaft at that position Then, the holding shaft on the driving side is rotated by the driving mechanism, and the yarn is wound around the beam under the tension control system.

[0003] A conventional automatic beam processing apparatus is disclosed in
As disclosed in JP-A-80705 and JP-A-2-154244, after a beam is positioned on the axis of a pair of holding shafts by a lifting device, at least one of the two shafts is urged. Move the beam until the chucking of the beam is completed by a moving device while urging it with a mechanism, for example, a spring.After that, while holding the state as it is, the holding shaft on the drive side is rotated by the drive mechanism to wind the yarn on the beam. This was performed under a tension control system.

In a tension control system used in a conventional delivery device or a winding machine, the time required for detecting the beam tension by a tension sensor and the time required for the beam drive motor to reach a required torque are taken. There is a response delay due to a time lag. For this reason, if the rotation of the beam is not performed smoothly, the rotation of the beam becomes worse, and hunting occurs. In particular, in the case of a yarn having a low tension, hunting is likely to occur.

[0005]

In the manual mounting described above, it takes time and effort to hang the beam, and it cannot cope with today's high-speed machines. In addition, in the conventional automatic device, when the beam is chucked, the thrust force for pinching between the pair of holding shafts remains as it is, so mechanical loss occurs, and rotation unevenness occurs on both shafts. I do. As a result, response delay and hunting are likely to occur in the tension control system.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to reduce the thrust force generated in the axial direction of a pair of holding shafts, reduce mechanical loss, and make the rotation of the beam holding portion smooth.

[0007]

According to the present invention, there is provided a beam automatic attachment / detachment device for a delivery device or a winding machine, which mechanically reduces a thrust force generated in a thrust direction of a pair of holding shafts when chucking a beam. In order to reduce the loss, a feed moving mechanism that moves at least one of the pair of holding shafts and a clamp mechanism that transmits the moving force of the feed moving mechanism to the holding shaft are provided. Upon completion, the feed moving mechanism is stopped, and the clamp mechanism is unclamped, thereby reducing the thrust force.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 to 3, an automatic beam attaching / detaching apparatus 1 according to the present embodiment is provided at least on a holding shaft 2 on a driven side of a pair of holding shafts 2 of a winding machine. A first embodiment including a mechanism 3, a clamp cylinder 5 as a clamp mechanism, and a position sensor 24, and a second embodiment in which an air cylinder 4 is provided as an urging mechanism in the first embodiment. is there. The automatic beam attachment / detachment device on the driving side has substantially the same configuration as the portion of the holding shaft 2 on the driven side, and a description thereof will be omitted.

[0009]

First Embodiment The feed moving mechanism 3 is connected to a motor 14 having a brake, a pair of feed screws 8 and a feed nut 9 for converting the rotational motion of the motor 14 into a linear motion, and a pair of feed nuts 9. A connecting member 16, two parallel rods 30 having one end fixed to the connecting member 16, and a mounting plate 20 mounted on the other end of the rod 30, and a clamp described below for clamping the rod 30. The holding shaft 2 is moved in the chucking direction along the shaft hole 7 of the support frame 6 via the cylinder 5.

A slider 15 for swinging the outer periphery of the small diameter portion 2a of the holding shaft 2 is fixed to the center of the connecting member 16. The slider 15 and the connecting plate 32 form an engaging member that engages the holding shaft 2 and the connecting member 16 of the feed moving device 3 when the connecting member 16 moves in the free direction.

The clamp cylinder 5 is fixed to a connection plate 32 attached to the rear end of the holding shaft 2, a rod 30 is inserted into an internal clamp sleeve (not shown), and the clamp cylinder 5 is disposed between the internal clamp sleeve and a cylinder case (not shown). The inner clamp sleeve is elastically deformed in the radial direction by a high pressure or a low pressure in the pneumatic chamber, a clamp operation for holding the rod 30 in a firmly fixed state, and a predetermined moving force is transmitted by sliding the rod 30. Loose clamp operation (semi-clamp operation) to hold in possible state
Alternatively, the unclamping operation in a state where the clamp sleeve is not in contact with the rod 30 is performed.

The rotation of the motor 14 is transmitted to the composite sprocket 21 via the chain 23, and the tension of the chain 19 can be adjusted by the tension sprocket 26.
Driven sprocket 2 fixed to feed screw 8 through
5 is transmitted.

A chuck 10 is provided at the tip of the holding shaft 2 in the chucking direction. The chuck 10 has a sleeve 12 rotatable by a bearing 11 and chucks a beam shaft 18 of a beam 17 by fitting. .

The position sensor 2 is mounted on the mounting plate 20.
The position of the beam 17 is detected as a position where the chucking of the beam 17 is completed, that is, a relative position between the holding shaft 2 and the feed moving mechanism 3, that is, a position separated by a distance d from the detection body 28 provided on the connection plate 32. The signal from the position sensor 24 is used as a signal for stopping the forward rotation of the motor 14, that is, the advance of the holding shaft 2. Further, the limit switch 22 for stopping the free fixed position is provided with the dog 1 provided on the connecting member 16.
3, the free fixed position is detected. The limit switch 27 for stopping the overrun position is connected to the connecting member 1.
The engagement with the dog 31 provided at 6 detects the over position and prevents overrun.

Next, the operation of the automatic beam attaching / detaching apparatus 1 according to the first embodiment will be described with reference to FIG.

When setting the beam 17, first, the holding shaft 2 is retracted and set at the standby position (free fixed position).
The distance between the pair of holding shafts 2 is increased, and then the beam 17 is positioned on the axis of the pair of holding shafts 2 by a known lifting device. Note that the standby position is the limit switch 22
Can be confirmed by turning on. In this state, the clamp cylinder 5 is set to a loose clamp state when turned on, and is in a state where a predetermined moving force can be transmitted between the clamp cylinder 5 and the rod 30. Also, the slider 15
It is in a state of contact with the connection plate 32.

By rotating the motor 14 in this state, the setting operation, that is, the beam 1 between the pair of holding shafts 2 is performed.
When the operation of sandwiching 7 and rotatably supporting it is started,
The holding shaft 2 moves in the chucking direction together with the clamp cylinder 5 that loosely clamps the rod 30 of the feed moving mechanism 3. During this movement process, the sleeve 12
Fit on the beam axis 18. At the beginning of the set operation, the limit switch 22 is turned off.

At this time, the feed (chucking) of the holding shaft 2 is performed.
The moving force in the direction is limited by the loose clamping force of the clamp cylinder 5. Therefore, even if the screw moving force of the feed moving mechanism 3 is strong, the moving force in the feeding (chucking) direction does not become larger than the above-mentioned limit value. As a result, the transmission portion of the feed force and the bearing 1 inside the chuck 10 are formed.
Damage such as 1 can be prevented beforehand.

When the chucking completion operation is performed, the sleeve 12 is completely inserted into the beam axis 18 and the beam 17
After the opening end surface of the sleeve 12 inside the chuck 10 hits the side surface of the chuck 10, the feed operation of the feed moving mechanism 3 continues. Therefore, when the rod 30 cannot move any more, the clamp cylinder 5 in the loose clamp state is not used. , The slider 15 and a part of the feed moving mechanism 3 provided integrally with the slider 15 are allowed to move in the feed direction.

When the slider 15 moves away from the connecting plate 32, the distance between the position sensor 24 and the detecting body 28 decreases,
When it reaches the distance d, this is detected by the position sensor 24 and turned on. When the position sensor 24 is turned on, the motor 14 is turned off, and the chucking of the beam 17 is completed. After the chucking of the beam 17 is completed, the axial movement of the holding shaft 2 is restrained by the screwing of the feed nut 9 and the feed screw 8 under the above-mentioned predetermined moving force.

If the clamp cylinder 5 is once unclamped before the operation of the winder, the thrust applied to the beam 17 in the chucking direction at the time of chucking is released by the unclamping operation. Power drops.

After the thrust force is reduced, the operation of the winder is started after the clamp cylinder 5 is again clamped. When the free operation is performed to release and take out the beam 17 after the operation, when the clamp cylinder 5 is unclamped and the motor 14 is rotated in the reverse direction,
Since the connection between the holding shaft 2 and the feed moving mechanism 3 is disconnected, only the feed moving mechanism 3 is once retracted, the slider 15 comes into contact with the connecting plate 32, and then the holding shaft and the clamp are brought into contact with the connecting plate 32. The cylinder 5 moves integrally in the direction away from the beam 17, that is, in the free direction. When the limit switch 22 is turned on by the dog 13, the motor 14 is turned off and stops at the free fixed position. The slider 15
Abuts on the connection plate 32, the distance d between the position sensor 24 and the detection body 28 is greater than or equal to d, so that the condition for allowing the forward rotation of the motor 14, that is, the advance of the holding shaft 2, is satisfied.

[0023]

Second Embodiment The device of this embodiment can increase the chucking force of the beam 17 even when the loose clamping force of the clamp cylinder 5 of the device of the first embodiment is small. In addition, the air cylinder 4 is biased as a biasing mechanism for biasing the holding shaft 2 in the chucking direction. The air cylinder 4 is mounted on the mounting plate 2.
0 is fixed to the holding shaft 2 side, and the tip of the piston rod 29 is in contact with the connecting plate 32. When the beam 17 is chucked, the holding shaft 2 is elastically attached in the chucking direction by compressed air. Urge the chuck 10 into the beam axis 18.

Next, the operation of the automatic beam attaching / detaching apparatus 1 according to the second embodiment will be described with reference to FIG. The description of the same operation as the operation of the apparatus of the first embodiment will be omitted.

When performing the setting operation, the holding shaft 2 is located at the standby position, the slider 15 contacts the connecting plate 32, and the air cylinder 4 is in the ON state. When the setting operation of the beam 17 is started in this state, the air cylinder 4, the holding shaft 2, and the clamp cylinder 5 move integrally in the chucking direction by the screw feeding action of the feed moving mechanism 3.

At this time, the moving force of the holding shaft 2 in the chucking direction is limited to the sum of the loose clamping force of the clamp cylinder 5 and the elastic urging force of the air cylinder 4. Therefore, similarly to the first embodiment, the feed moving mechanism 3
, The moving force in the feed (chucking) direction does not become larger than the limit value. This can prevent the transmission portion of the feed force and the bearing 11 inside the chuck 10 from being damaged.

Next, when the chucking is completed, the clamp cylinder 5 is set to the unclamped state, and at the same time, the air cylinder 4 is turned off to eliminate the thrust force on the beam 17. After the above-mentioned thrust force is eliminated, the operation of the winder is started after the clamp cylinder 5 is again subjected to the clamp operation. During this operation, the air cylinder 4 may be turned off as necessary. In particular, it is preferable to turn it off to eliminate the thrust force during operation.

When performing the free operation, except that the air cylinder 4 is turned on, the holding shaft 2, the air cylinder 4 and the clamp cylinder 5 are subjected to the same operation as the case of performing the free operation of the first embodiment. , Integrally move backward in the free direction, and when the limit switch 22 is turned on, the motor 14
Turns off and stops at the free position.

In particular, even when the clamp cylinder 5 is in the unclamped state, if there is a mechanical loss such as frictional resistance between the clamp sleeve and the rod 30 inside the clamp cylinder 5, the motor 14 is rotated in the reverse direction and the feed moving mechanism is moved. When the motor 3 is moved backward, the forward rotation of the motor 14 is turned off while the relative position between the holding shaft 2 and the feed moving mechanism 3 remains unchanged, that is, while the distance d between the position sensor 24 and the detection body 28 remains. Move to the standby position and stop.

For this reason, the urging force of the air cylinder 4 as the urging mechanism overcomes the mechanical loss of the clamp cylinder 5 and is equivalent to the gap between the slider 15 of the feed moving mechanism 3 and the connecting plate 32 of the holding shaft 2, that is, Until the feed moving mechanism 3 contacts the connection plate 32, the feed moving mechanism 3
Act on. Therefore, the motor 14 is separated more than the distance d between the position sensor 24 and the detection body 28, so that the forward rotation of the motor 14, that is, the forward movement of the holding shaft 2 becomes possible.

When the feed moving mechanism 3 is provided for each of the pair of holding shafts 2, the beam 17 is divided into the center by the balance of the pressing force from the left and right ends even if the total length of the beam 17 is different. Set. Further, since the thrust force generated in the axial direction of the holding shaft 2 can be reduced, mechanical loss is reduced, and the rotation of the holding shaft 2 becomes smooth. Accordingly, the rotation of the beam 17 becomes smooth, and the tension control is stabilized even with a low tension yarn.

[0032]

Other Embodiments The present invention can be applied to a delivery device for sending out yarn from a beam 17. The automatic beam attachment / detachment device 1 can be provided only on one side of the pair of holding shafts 2. Instead of an air cylinder, a spring or a combination of a cylinder and a spring having a buffer structure may be provided as the urging mechanism 4. In this case, the spring always applies a biasing force to the holding shaft 2 as is clear from the operation diagram shown in FIG.

As shown in FIG. 5, the feed moving mechanism 3 includes a motor 14 with a brake, a speed reducer (worm 34, worm wheel 35), a rack 36 for converting rotational motion into linear motion, a pinion 37, and the like. May be.
Instead of an air cylinder type clamp mechanism, a known loose clamp mechanism that limits the moving force of the feed moving mechanism 3 to a predetermined moving force value and transmits the moving force to the holding shaft 2 by a spring tightening method may be employed. Further, as a clamping mechanism, as shown in FIG.
In the operation transmission path between the motor and the motor 14, the holding shaft 2
From the part that blocks the force in the free direction
It may be used by being interposed in the movement transmission path on the side.

[0034]

As is clear from the above description, according to the present invention, the following effects can be obtained. In other words, from after the beam chucking operation is completed to before the operation starts,
By performing the unclamping operation of the clamp mechanism, the thrust force generated in the setting (chucking) direction of the holding shaft can be reduced, so that the mechanical loss is reduced and the rotation of the holding shaft becomes smooth. Accordingly, the rotation of the beam becomes smooth, and the tension control is stabilized even with a low tension yarn.

Further, the following effects are also obtained. By providing the urging mechanism, it is possible to prevent damage to the transmitting portion of the feed force and the bearing inside the chuck. Since the clamp mechanism can be made smaller by using the clamp mechanism and the urging mechanism together, the size can be made smaller than an apparatus using only the clamp mechanism. When the clamp mechanism has mechanical loss, the device can be operated without being affected by the mechanical loss of the clamp mechanism, especially when the urging mechanism is used together.

[Brief description of the drawings]

FIG. 1 is a side view showing an automatic beam attaching / detaching apparatus according to an embodiment.

FIG. 2 is a partial cross-sectional view showing the automatic beam attaching / detaching device of FIG. 1;

FIG. 3 is a skeleton diagram showing the automatic beam attaching / detaching device of FIG. 2;

FIG. 4 is a time chart of the operation.

FIG. 5 is a schematic view of another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automatic beam attachment / detachment device 2 Holding shaft 2a Small diameter portion of holding shaft 2b Stepped portion of holding shaft 3 Feeding movement mechanism 4 Air cylinder (biasing mechanism) 5 Clamp cylinder (clamp mechanism) 6 Support frame 7 Shaft hole 8 Feed screw 9 Feed nut 10 Chuck 11 Bearing 12 Sleeve 13 Dog 14 Motor 15 Slider 16 Connecting member (engaging member) 17 Beam 18 Beam axis 19 Chain 20 Mounting plate 21 Composite sprocket 22 Limit switch 23 Chain 24 Position sensor 25 Follower sprocket 26 Tension sprocket 27 Limit switch 28 Detector 29 Piston rod 30 Rod 31 Dog 32 Connecting plate (engaging member) 33 Clutch (clamp mechanism) 34 Worm 35 Worm wheel 36 Rack 37 Pinion Distance

Claims (2)

(57) [Claims] 1. A pair of holding shafts (2) for rotatably supporting both ends of a beam (17) and at least one of the pair of holding shafts (2) in a chucking direction of the beam (17). A feed moving mechanism (3) for engaging and moving the engaging members (16, 32) in the free direction via a clamp mechanism (5) described later, a beam (17) and a feed moving mechanism (3). A clamp mechanism (5) interposed in a motion transmission path between the motor and the driving motor (14) and capable of switching a clamping force for preventing a free direction force applied to the holding shaft (2) in at least two stages. ), And a position sensor (24) for detecting a relative position between the holding shaft (2) and the feed moving mechanism (3), and a detection signal from the position sensor (24) when moving in the chucking direction. Chucking of beam (17) based on Stopping feeding moving mechanism (3) to Ryoji, beam automatic attachment apparatus for causing unclamped operation of smaller clamping force than the chucking clamp force a clamping mechanism (5) (1). 2. A pair of holding shafts (2) for rotatably supporting both ends of a beam (17), and at least one of the pair of holding shafts (2) in a chucking direction of the beam (17). A feed moving mechanism (3) for engaging and moving the engaging members (16, 32) in the free direction via a clamp mechanism (5) described later, a beam (17) and a feed moving mechanism (3). An urging mechanism (4) interposed between the motor (14) to be driven and elastically urging the holding shaft (2) in the chucking direction of the beam (17) when chucking the beam (17); A clamp interposed in a motion transmission path between the beam (17) and the motor (14) and capable of switching a clamping force for preventing a free direction force applied to the holding shaft (2) in at least two stages. Mechanism (5), said holding shaft (2) and feed movement And a position sensor (24) for detecting a relative position with respect to the mechanism (3). When the beam (17) is moved in the chucking direction, the beam (17) is sent upon completion of chucking based on a detection signal from the position sensor (24). An automatic beam attachment / detachment device (1), wherein the moving mechanism (3) is stopped, and the clamping mechanism (5) is unclamped with a clamping force smaller than a clamping force capable of chucking.