JPH07206229A - Automatic beam attaching/detaching device - Google Patents

Abstract

PURPOSE:To reduce thrust force generated in the hold shaft axial direction, reduce mechanical loss, and smooth rotation of a beam, CONSTITUTION:An automatic beam attach/detach device 1 comprises a feed movement mechanism 3 for moving at least one hold shaft 2 of a pair of hold shafts 2, an energizing mechanism 4 for energizing the hold shafts 2 to beam 17 in the case of chucking of the beam 17, a clamp mechanism 5 for clamping movement of the hold shafts 2 after completion of chucking of the beam 17, and a position sensor 24 for detecting relative position of the holding shafts 2 and the feed movement mechanism 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic beam attaching / detaching device for automatically attaching / detaching a beam in a feeding device or a winding machine.

[0002]

2. Description of the Related Art Conventionally, when a beam is manually attached to a feeding device or a winder, after centering for positioning the beam on the axes of a pair of holding shafts facing each other on the same axis, for example, holding on the driven side. While pushing the shaft by hand, chuck the beam between both axes, and after the beam is chucked, stop pushing the holding shaft by hand and clamp the holding shaft at that position. Then, the holding shaft on the drive side is rotated by the drive mechanism to wind the yarn around the beam under the tension control system.

A conventional automatic beam in-process apparatus is disclosed in Japanese Patent Publication No.
As disclosed in Japanese Patent Application Laid-Open No. -80705 and Japanese Patent Application Laid-Open No. H2-1540244, after positioning a beam on the axis of a pair of holding shafts by a lifting device, at least one of the shafts is urged. A mechanism such as a spring is used to move the beam until chucking of the beam is completed by the moving device, and then the holding shaft on the drive side is rotated by the drive mechanism while keeping the state as it is to wind the yarn around the beam. It was done under tension control system.

In the tension control system used in the conventional feeding device or winder, the time between the time when the tension sensor detects the beam tension and the time when the beam drive motor reaches the required torque is set. There is a response delay due to the time lag. Therefore, if the beam is not rotated smoothly, the beam is further deteriorated and hunting occurs. In particular, hunting is likely to occur when the yarn has a low tension.

[0005]

However, the above-mentioned manual attachment requires a lot of time and effort to engage and disengage the beam, and cannot cope with the speeding up of today's machines. In addition, in the conventional automatic tacking device, when the beam is chucked, the thrust force for sandwiching between the pair of holding shafts remains as it is, so mechanical loss occurs and uneven rotation occurs on both shafts. To 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 the mechanical loss, and make the rotation of the beam holding portion smooth.

[0007]

SUMMARY OF THE INVENTION The present invention relates to an automatic beam attachment / detachment device for a delivery device or a winder, which mechanically reduces the thrust force generated in the thrust direction of a pair of holding shafts when chucking the beam. In order to reduce loss, a feed moving mechanism that moves at least one of the holding shafts of the pair of holding shafts and a clamp mechanism that transmits the moving force of the feed moving mechanism to the holding shafts are provided, and beam chucking is performed. When completed, the feed movement 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 device 1 according to this embodiment is provided on at least a driven side holding shaft 2 of a pair of holding shafts 2 of a winder, and is fed and moved. The first embodiment including the mechanism 3, the clamp cylinder 5 as the clamp mechanism, and the position sensor 24, and the second embodiment in which the air cylinder 4 is additionally provided as the biasing mechanism in the first embodiment. is there. Since the automatic beam attaching / detaching device on the driving side has substantially the same structure as the holding shaft 2 on the driven side, the description thereof will be omitted.

[0009]

[First Embodiment] The feed moving mechanism 3 is connected to a motor 14 with a brake, a pair of feed screws 8 and a feed nut 9 for converting a rotational movement of the motor 14 into a linear movement, and a pair of feed nuts 9. Clamp for clamping the rod 30, which includes the connected connecting member 16 and two parallel rods 30 having one end fixed to the connecting member 16 and the mounting plate 20 attached to the other end of the rod 30. The holding shaft 2 is moved along the shaft hole 7 of the support frame 6 through the cylinder 5 in the chucking direction.

A slider 15 for swinging the outer peripheral portion 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 connecting plate 32 attached to the rear end portion of the holding shaft 2, and a rod 30 is inserted into an inner clamp sleeve (not shown) so that a space between the inner clamp sleeve and a cylinder case (not shown). Equipped with an air pressure chamber, the high pressure or low pressure in the air pressure chamber elastically deforms the inner clamp sleeve in the radial direction to hold the rod 30 in a firmly fixed state, and the rod 30 is slid to transmit a predetermined moving force. Loose clamp operation (semi-clamp operation) to hold in a possible state
Alternatively, the unclamping operation is performed while the clamp sleeve is not in contact with the rod 30.

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

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

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

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

When setting the beam 17, first, the holding shaft 2 is retracted and placed at the standby position (free fixed position),
The pair of holding shafts 2 are spaced apart, and then the beam 17 is positioned on the axis of the pair of holding shafts 2 by a well-known lifting device. The standby position is the limit switch 22.
It 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 in which a predetermined moving force can be transmitted between the clamp cylinder 5 and the rod 30. Also, the slider 15 is
It is in contact with the connecting plate 32.

By rotating the motor 14 in this state, the beam 1 is moved between the pair of holding shafts 2 in the setting operation.
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 movement mechanism 3. During this movement process, the sleeve 12
Fit on the beam axis 18. At the beginning of this set operation, the limit switch 22 is turned off.

At this time, the feeding of the holding shaft 2 (chucking)
The moving force in the direction is limited to the loose clamp force of the clamp cylinder 5. Therefore, even if the screw feeding force of the feed moving mechanism 3 is strong, the moving force in the feeding (chucking) direction does not become larger than the above limit value. As a result, the portion for transmitting the feed force and the bearing 1 inside the chuck 10
It is possible to prevent damage such as 1.

When the chucking completion operation is performed, the sleeve 12 completely fits into the beam axis 18, and the beam 17
Even 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, so that when the rod 30 cannot move any more, the clamp cylinder 5 in the loose clamp state. Therefore, 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 detection body 28 decreases,
When it reaches the distance d, the position sensor 24 detects this and turns 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 restricted 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 unclamped before the start of the operation of the winder, the thrust stress acting in the chucking direction generated during chucking is released by this unclamp operation, so the thrust to the beam 17 is released. Power is reduced.

After reducing the thrust force, the clamp cylinder 5 is clamped again, and the operation of the winder is started. When free operation is performed to release and extract the beam 17 after the operation is completed, 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 broken, only the feed moving mechanism 3 is once retracted, the slider 15 abuts on the connecting plate 32, and then the holding shaft and the clamp in the abutting state. The cylinder 5 moves integrally in the direction away from the beam 17, that is, in the free direction, and 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
When comes into contact with the connecting plate 32, the distance d between the position sensor 24 and the detection body 28 is increased by at least the distance d, so that the condition for allowing the normal rotation of the motor 14, that is, the forward movement of the holding shaft 2 is satisfied.

[0023]

[Second Embodiment] The apparatus of this embodiment can enhance the chucking force of the beam 17 even when the loose clamping force of the clamp cylinder 5 of the apparatus of the first embodiment is small. In addition, the air cylinder 4 is biased as a biasing mechanism that biases the holding shaft 2 in the chucking direction. This air cylinder 4 has a mounting plate 2
0 is fixed to the holding shaft 2 side, and the tip of the piston rod 29 thereof 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. Then, the chuck 10 is fitted on the beam shaft 18.

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

When performing the setting operation, the holding shaft 2 is placed in 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 are integrally moved 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 clamp force of the clamp cylinder 5 and the elastic biasing force of the air cylinder 4. Therefore, as in the first embodiment, the feed movement mechanism 3
Even if the screw feeding force is strong, the moving force in the feeding (chucking) direction does not become larger than the above limit value. As a result, it is possible to prevent damage to the feed force transmitting portion and the bearing 11 inside the chuck 10.

Next, when chucking is completed, the clamp cylinder 5 is brought into an unclamped state, and at the same time, the air cylinder 4 is turned off to eliminate the thrust force on the beam 17. After eliminating the thrust force, the clamp cylinder 5 is clamped again, and then the operation of the winder is started. During this operation, the air cylinder 4 may be turned off if necessary. In particular, it is preferable to turn it off to eliminate the thrust force during operation.

When performing the free movement, the holding shaft 2, the air cylinder 4 and the clamp cylinder 5 are subjected to the same operation as the free movement of the first embodiment except that the air cylinder 4 is turned on. , The unit moves 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 if the clamp cylinder 5 is in the unclamped state, if there is 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 movement mechanism is used. When 3 is retracted, the normal position of the motor 14 is turned off while the relative position between the holding shaft 2 and the feed movement mechanism 3 remains unchanged, that is, the distance d between the position sensor 24 and the detection body 28 remains unchanged. Then 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 only 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 comes into contact with the connecting plate 32, the feed moving mechanism 3
Act on. Therefore, since the distance between the position sensor 24 and the detection body 28 is separated by a distance d or more, the motor 14 can rotate in the normal direction, that is, the holding shaft 2 can move forward.

When the feed moving mechanism 3 is provided for each of the pair of holding shafts 2, the beam 17 is indexed to 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, the mechanical loss is reduced and the holding shaft 2 can be smoothly rotated. Therefore, the rotation of the beam 17 becomes smooth, and the tension control is stable even with a low tension yarn.

[0032]

Other Embodiments The present invention can also be applied to a delivery device for delivering the yarn from the beam 17. The beam automatic attachment / detachment device 1 may be provided only on one side of the pair of holding shafts 2. Instead of the air cylinder, the biasing mechanism 4 may be provided with a spring or a cushioning structure in which a cylinder and a spring are combined. As is clear from the operation diagram shown in FIG. 4, the spring in this case always exerts a biasing force on the holding shaft 2.

As shown in FIG. 5, the feed moving mechanism 3 comprises a motor 14 with a brake, a speed reducer (worm 34, worm wheel 35), a rack 36 and a pinion 37 for converting a rotary motion into a linear motion, and the like. You may.
Instead of the air cylinder type as the clamp mechanism, a known loose clamp mechanism that limits the moving force of the feed moving mechanism 3 to a predetermined moving force value by the spring tightening method and transmits it to the holding shaft 2 may be used. Further, as the clamp mechanism, instead of the above-described clamp cylinder 5, as shown in FIG.
And the holding shaft 2 in the operation transmission path between the motor and the motor 14.
Holding shaft 2 from the part that blocks the force applied to the free direction
It may be used by interposing it in the side motion transmission path.

[0034]

As is apparent from the above description, according to the present invention, the following effects can be obtained. In other words, from the completion of the beam chucking operation to the start of operation,
By unclamping the clamp mechanism, the thrust force generated in the setting (chucking) direction of the holding shaft can be reduced, so that mechanical loss is reduced and the holding shaft rotates smoothly. Therefore, the rotation of the beam becomes smooth, and the tension control is stable even with low tension yarn.

Further, there are the following effects. By attaching the urging mechanism, it is possible to prevent damage to the feed force transmitting portion 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 the device using only the clamp mechanism. When the clamp mechanism has a mechanical loss, the device can be operated without being affected by the mechanical loss of the clamp mechanism particularly when the biasing mechanism is used together.

[Brief description of drawings]

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

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

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

FIG. 4 is a time chart diagram of the operation.

FIG. 5 is a schematic view of another embodiment.

[Explanation of symbols]

 1 Automatic beam attaching / detaching device 2 Holding shaft 2a Small diameter part of holding shaft 2b Stepped part of holding shaft 3 Feed moving mechanism 4 Air cylinder (biasing mechanism) 5 Clamp cylinder (clamping 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 Driven 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)

[Claims] 1. A pair of holding shafts (2) for rotatably supporting both ends of the beam (17) and at least one of the pair of holding shafts (2) in the 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) capable of switching the clamp force for blocking the force in the free direction exerted on the holding shaft (2) in at least two stages by interposing it in a motion transmission path between the driving motor (14). ) And a position sensor (24) for detecting the relative position of the holding shaft (2) and the feed movement mechanism (3), and a detection signal from the position sensor (24) during movement in the chucking direction. Beam (17) chucking 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 the beam (17) and at least one of the pair of holding shafts (2) in the 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 biasing mechanism (4) interposed between the driving motor (14) and resiliently biasing the holding shaft (2) in the chucking direction of the beam (17) when the beam (17) is chucked; A clamp that is interposed in the motion transmission path between the beam (17) and the motor (14) and that can switch the clamping force for blocking the force in the free direction applied to the holding shaft (2) in at least two stages. Mechanism (5), holding shaft (2) and feed movement A position sensor (24) for detecting a relative position to the mechanism (3) is provided, and when the beam (17) is chucked, it is sent based on a detection signal from the position sensor (24) when moving in the chucking direction. An automatic beam attaching / detaching device (1), characterized in that the moving mechanism (3) is stopped and the clamp mechanism (5) is unclamped with a clamping force smaller than the clamping force capable of chucking.