JPH06263189A - Cap closing device - Google Patents

Abstract

PURPOSE:To prevent the heating and wear of a clutch part of a screw capper, damage to a skirt part of a roll-on capper, the formation of wear chips and the looseness of a cap. CONSTITUTION:When a main motor 43 is driven to rotate a turntable 21 and bottles 20 thereon, an adjustable speed motor 36 is driven to transmit rotating action to a rotating spindle 30 so as to rotate a capping cylinder 100, the rotating spindle 30 and a cap closing head 33 synchronously with the bottles 20 moving on the turntable 21. In a cap closing zone, the capping cylinder 100, the rotating spindle 30 and the cap closing head 33 are moved downwardly to rotate the cap closing head 33 along the outside periphery of a screw cap or roll-on cap on the bottle 20, while the cap closing load of the capping cylinder 100 is being applied to the cap closing head 33, thereby closing the cap.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll-on capper for fastening a metal cap while forming a metal cap in a spiral groove at the inlet of a container, a screw capper for covering a container with a screw cap having a screw, a crown capping machine, and the like. The present invention relates to a lid fastening device to be applied.

[0002]

2. Description of the Related Art A lid tightening device applied to a conventional rotary stoppering machine will be described with reference to FIGS. 3 and 4. 1 in FIG. 3 is a rotary capper, and a container B conveyed by a conveyor 2 is a star. It is introduced into the rotary capper 1 by the wheel 3, closed by the rotary capper 1, and then discharged to the carry-out conveyor 5 by the star wheel 4 on the carry-out side.

As shown in FIG. 4, the rotary capper 1 includes a vertical fixed shaft 6 and a rotating body 7 rotatable with respect to the fixed shaft 6, and the rotating body 7 is equipped with a motor 8. Is rotated by. The motor 8 is linked to the operating speed of a filling device provided on the upstream side of the rotary capper 1 or a label sticking device provided on the downstream side (neither of which is shown), etc.
Control the rotation speed of.

A rotary table 10 is integrated with the rotary body 7,
The rotary table 10 is provided with a plurality of container gripping mechanisms 11 at equidistant positions on the circumference centered on the center of rotation of the rotating body 7. Reference numeral 15 is a plurality of guide rods arranged around the rotating body 7, and 16 is a plurality of cylinder devices arranged around the rotating body 7. The guide rods 15 and the upper end portions of the cylinder devices 16 are It is fixed to the upper part of the rotating body 7.
A plurality of brackets 14 are supported by the respective guide rods 15 so as to be able to move up and down, and the lower end portion of the piston rod of each cylinder device 16 is attached to each bracket 14.
A plurality of motors 12 are attached to the respective brackets 14,
Reference numeral 13 denotes a plurality of stopper gripping mechanisms rotated by the respective motors 12, and the respective stopper gripping mechanisms 13 are located immediately above the respective container gripping mechanisms 11.

Reference numeral 18 is a rotary joint attached to the upper end of the rotary body 7, 19 is a controller, 17 is a conductive wire connecting the controller 19 and each motor 12 via the rotary joint 18, and each controller 19 controls the electric wire. The motor 12 is independently driven to rotate at a constant rotation speed. In the lid fastening device shown in FIGS. 3 and 4, when the motor 8 is started to rotate the rotary body 7 and the rotary table 10 about the fixed shaft 6, the star wheel 3 is rotationally driven in synchronization with this. The star wheel 3 sequentially introduces the container B on the conveyor 2 into the container gripping mechanism 11 on the rotary table 10, and the container B is gripped by the container gripping mechanism 11.
On the other hand, the stopper is attached from a chute (not shown) or the like to the stopper gripping mechanism 13
To be sequentially gripped by the plug gripping mechanism 13.

When the container B is gripped by the container gripping mechanism 11 and the plug is gripped by the plug gripping mechanism 13,
The cylinder device 16 lowers the plug gripping device 13 to screw the plug into the container B. When the capping torque reaches a predetermined value, a known clutch receiving a spring force or air pressure corresponding to the predetermined value shuts off the power transmission mechanism between the rotating motor 12 and the plug gripping mechanism 13. The stopper gripping mechanism 13 is stopped.

After that, the grip of the plug by the plug gripping mechanism 13 is released, the cylinder gripper 16 raises the plug gripping mechanism 13, and the plug gripping mechanism 13 is again connected to the clutch by the motor 12 at a constant rotation speed. It is driven to rotate. When the container gripping mechanism 11 releases the container B, the container B is discharged onto the discharge conveyor 5 by the star wheel 4 on the discharge side.

Whether the operating speeds of the rotating body 7 and the rotary table 10 driven by the motor 8 are switched to high speed or low speed for some reason when the stopper gripping mechanism 13 tightens the stopper to the container B, Even when stopped, the plug gripping mechanism 13 is rotated by the motor 12 at a constant rotation speed regardless of the rotation speeds of the rotating body 7 and the rotary table 10. The plug can be tightened with a constant capping torque without changing the breaking condition. And the rotary body 7 and the rotary table 1
When the stop time of 0 exceeds the time required for closing the plug, the controller 19 releases the grip of the plug by the plug gripping mechanism 13,
The motor 12 is stopped.

[0009]

In the conventional lid closing device for the rotary capping machine shown in FIGS. 3 and 4, the rotor 7 and the rotary table 10 and the capping head of the plug gripping mechanism 13 have different motors. Since it is rotated by 8 and 12, when the rotating body 7 and the rotary table 10 become slow or stop, the plug gripping mechanism 13 screw-fastens a screw capper (a screw-provided plug to the container mouth). In the case of a screw capper, the clutch of the plug gripping mechanism 13 continues to slide for a long time, and heat and wear occur in the cutic portion.

When the rotating body 7 and the rotary table 10 become slow or stop, the stopper gripping mechanism 13 covers the roll-on capper (the container mouth is covered with a roll-on cap (cylindrical stopper with bottom)). After that, a roll-on capper that screw-rolls a roll-on cap along the screw of the container mouth by the forming roller of the rotating capping head)
In this case, the capping head may rotate more than necessary, rubbing the skirt part of the roll-on cap evenly to damage it, generating abrasion powder, and loosening the roll-on cap tightened. there were.

The present invention has been proposed in view of the above problems, and an object thereof is to prevent heat generation and wear of the clutch portion in the case of a screw capper, and in the case of a roll-on capper. Is to provide a lid tightening device capable of preventing damage to the skirt of the roll-on cap, generation of abrasion powder, and loosening of the tightened roll-on cap.

[0012]

In order to achieve the above object, the lid fastening device of the present invention conveys a container by rotating the main motor in a horizontal direction around a vertical stationary column by the main motor. A turntable, a rotation speed detector of the main motor, a variable speed motor installed on the top plate integral with the support, a rotation speed detector of the same variable speed motor, and a rotatable spindle, A capping cylinder attached to a member that rotates together with the turntable so as to be able to move up and down, a lid tightening head attached to a lower portion of the rotary spindle, a sun gear rotatably fitted to a boss integrated with the top plate, The power transmission mechanism that transmits the rotation of the speed change motor to the rotary spindle through the sun gear is compared with the rotation speed detection signals from the respective rotation speed detectors to compare the rotation speed and the rotation speed of the turntable. It calculates a rotational speed of the spindle so as to have a predetermined ratio and outputs the result to the variable speed motor which comprises a controller for controlling the rotational speed of the variable speed motor.

[0013]

The lid fastening device of the present invention is configured as described above, and when the main motor is driven and its rotation is transmitted to the turntable to rotate the turntable and the container on it, The variable speed motor is driven, and its rotation is transmitted to the rotary spindle via the sun gear, and the rotary spindle is rotated, and the capping cylinder, the rotary spindle, and the lid closing head are moved in synchronization with the container on the turntable. Let Then, in the cap tightening zone, the capping cylinder, the rotary spindle, and the lid closing head are lowered to rotate the lid closing head along the outer circumference of the screen cap or roll-on cap of the container, while the lid closing load of the capping cylinder is closed. In addition to the tightening head, tighten the lid. At this time, the control device compares the rotation speed detection signal from the main motor rotation speed detector with the rotation speed detection signal from the variable speed motor rotation speed detector to determine the rotation speed of the turntable and the rotation speed of the rotary spindle. Is output to the variable speed motor and the rotation speed of the variable speed motor is controlled.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a lid fastening device of the present invention will be described with reference to an embodiment shown in FIGS. 1 and 2. FIG. 1 shows the order in which a container (bottle) 20 is sent, and the container is conveyed by a conveyor 2. The bottle 20 is introduced into the lid fastening device 1 of the present invention by the star wheel 3, is closed by the lid fastening device 1, and then is carried out by the star wheel 4 on the delivery side.
It is designed to be discharged to. The lid fastening device 1 includes
There are a capping cylinder lowering zone, a cap tightening zone, and a capping cylinder rising zone.

FIG. 2 shows the details of the lid fastening device 1. In FIG. 2, 37 is a top plate, 36 is a variable speed motor such as a saboter for rotationally driving the rotary spindle 30 described later, and 3
Reference numeral 9 is a head cam suspended from the top plate. The head cam 39 has a function of moving the capping cylinder 100, which will be described later, up and down via the cam follower 32. 27 is a rotation output gear of the variable speed motor 36, 28 is a sun gear rotating around the boss, 100 is a capping cylinder,
The capping cylinder 100 includes a tightening head 33,
The roller 34 provided at the end of the tightening head 33, the pinion 35 driven by the sun gear 28, and the pinion 3
Cylinder sleeve 31 of rotating spindle 30 rotated by 5 and cam sleeve 3 for swinging roller 34
8 and a cam follower 4 for moving the cam sleeve 38 up and down.
2 and.

Reference numeral 41 denotes an auxiliary cam, which raises and lowers the cam sleeve 38 via a cam follower 42.
The roller 34 of the lid fastening head 33 is swung in the left-right direction to crimp the lid. 23 is a column fixed to the base 31,
Reference numeral 22 is a drive shaft driven by the main motor 43 via gears 44 and 22a, 21 is a turntable rotated by the drive shaft 22, and 26 is a member (head case) which rotates together with the turntable 21.

Reference numeral 45 is a control device, and 46 is a rotation indicator. The rotation indicator 46 indicates the number of windings of the lid clamping head 33 in the cap clamping zone shown in FIG. 1 and displays the number of windings. It is like this. 48 is the main motor 4
3 is a rotation speed detector, and 49 is a rotation speed detector of the variable speed motor 36. Next, the operation of the lid fastening device shown in FIG. 2 will be specifically described.

The drive shaft 22 is rotated by the main motor 43, and the turntable 21, the head case 26, and the bottle 20 on the turntable 21 are rotationally moved. At this time, the rotary spindles 30 of the capping cylinders 100 arranged in the head case 26 and the lid fastening heads 3 are provided.
3 also rotates in synchronization with the bottle 20 on the turntable 21.

Due to this rotational movement, the above-mentioned portions are provided in the cam groove of the head cam 39 and the cam follower 3 in the same cam groove.
Raise and lower with 2. The lowering of the capping cylinder 100 is performed in the lowering zone of FIG. 1, and the highering of the capping cylinder 100 is performed in the raising zone of FIG. On the other hand, the variable speed motor 36 is rotating at a predetermined number of rotations, and the rotation of the variable speed motor 36 is transmitted to the gear 27, the sun gear 28, the pinion 35 attached to each capping cylinder 100, and the rotating spindle 30. Thus, the rotary spindle 30 is rotating.

When the above-mentioned respective parts are lowered, that is, when passing through the cap tightening zone of FIG. 1, the lid tightening head 33 is rotated along the outer circumference of the roll-on cap and the lid tightening load of the capping cylinder 100 is closed. The roller 34 is swung by transmitting it to the non-rotating central axis of the head 33, and a screw is formed on the roll-on cap to close the lid. The tightening rotation of the lid tightening head 33 required to form the screw on the roll-on cap is 2 to 3 rotations (the same rotation may be applied when the screw cap is closed by the lid).

The lid tightening head 33 is rotated in the following manner. That is, the rotation of the main motor 43 is detected by the main motor rotation speed detector 48, the rotation of the variable speed motor 36 is detected by the variable motor rotation speed detector 49, and the detections obtained by these rotation speed detectors 48, 49 are detected. Signal to control device 4
5, the gear ratio of the transmission mechanism is taken into account, and the rotation speed of the variable speed motor 36 is calculated from the optimum ratio between the rotation speed of the turntable 21 and the rotation speed of the lid clamping head 33. Output the result to the variable speed motor 36,
Install the lid tightening head 33 in the cap tightening zone shown in FIG.
Rotate 3 to 3 times. At that time, the rotation indicator 46 indicates and displays the number of times the lid fastening head 33 is wound in the cap fastening zone.

The range of the cap tightening zone shown in FIG. 1 is fixed, and it is desirable to obtain the number of times of tightening the cover tightening head 33 determined by the cap during this range. In this embodiment, the number of windings of the lid closing head 33 is determined by the rotation indicator 4
I am instructing with 6. Further, in the present embodiment, the roll-on cap is tightened by the one variable speed motor 36 mounted on the fixed top plate and the gear system of the sun gear 28 and the pinion 35, so that the rotation speed of each lid tightening head 33 is reduced. As they are completely aligned, there is almost no variation in tightening force.

The lid tightening device includes a capping cylinder 10
There are a roll-on capper and a screw capper that need to rotate 0, and a crown capping machine and a maxi capper that do not require the capping cylinder 100 to rotate. If the capping cylinder 100 needs to rotate, As described above, the rotation speed of the capping cylinder 100 is set according to the characteristics of various caps in the cap tightening zone shown in FIG. 1, and the variable speed motor 36 is controlled. When it is not necessary to rotate the capping cylinder 100, the variable speed motor 28 is controlled so that the rotation speed of the sun gear 28 is the same as the rotation speed of the turntable 21.

[0024]

As described above, the lid tightening device of the present invention drives the main motor and transmits the rotation thereof to the turntable to rotate the turntable and the container on the turntable. Is driven and the rotation thereof is transmitted to the rotary spindle via the sun gear, and the rotary spindle is rotated to rotationally move the capping cylinder, the rotary spindle, and the lid clamping head in synchronization with the container on the turntable. Then, in the cap tightening zone, the capping cylinder, the rotary spindle, and the lid closing head are lowered to rotate the lid closing head along the outer circumference of the screen cap or roll-on cap of the container, while the lid closing load of the capping cylinder is closed. In addition to the tightening head, tighten the lid. At this time, the control device compares the rotation speed detection signal from the main motor rotation speed detector with the rotation speed detection signal from the variable speed motor rotation speed detector to determine the rotation speed of the turntable and the rotation speed of the rotary spindle. Is calculated so as to have a predetermined ratio and the result is output to the variable speed motor to control the rotation speed of the variable speed motor, so that the rotary table and the lid clamping head are always rotated at a constant rotation speed ratio. In the case of the screw capper when the rotary table becomes slow or stops, the clutch of the plug gripping mechanism does not continue to slide for a long time, and heat generation and wear of the clutch part can be prevented. . In the case of a roll-on capper, the lid tightening head does not rotate more than necessary, and the skirt of the roll-on cap is damaged.
It is possible to prevent generation of abrasion powder and loosening of the tightened roll-on cap.

[Brief description of drawings]

FIG. 1 is a plan view showing a capping cylinder lowering zone, a cap tightening zone, and a capping cylinder raising zone of a lid tightening device of the present invention.

FIG. 2 is a vertical sectional side view showing an embodiment of the lid fastening device.

FIG. 3 is a plan view showing an outline of a lid fastening device applied to a conventional rotary stoppering machine.

FIG. 4 is a vertical cross-sectional side view showing details of the lid fastening device.

[Explanation of symbols]

 20 Container (for example, Bottle) 21 Turntable 23 Strut 26 Member 28 Sun Gear 30 Rotating Spindle 33 Lid Clamping Head 35 Power Transmission Mechanism 36 Variable Speed Motor 37 Top Plate 43 Main Motor 45 Control Device 48 Rotation Speed Detector of Main Motor 43 49 Rotational speed detector for variable speed motor 36 100 capping cylinder

Claims (1)

[Claims] 1. A main motor, a turntable that horizontally rotates about a vertical stationary column by the main motor to convey a container, and a rotation speed detector of the main motor.
A variable speed motor installed on a top plate integrated with the support, a rotation speed detector of the variable speed motor, a rotatable spindle, and a capping cylinder attached to a member that rotates together with the turntable so as to be able to move up and down. A lid tightening head attached to the lower part of the rotary spindle, a sun gear rotatably fitted to a boss integral with the top plate, and rotation of the variable speed motor to the rotary spindle via the sun gear. The power transmission mechanism for transmitting is compared with the rotation speed detection signals from the respective rotation speed detectors, and the rotation speed of the turntable and the rotation speed of the rotary spindle are calculated so as to have a predetermined ratio, and the result is calculated as the variable speed. A lid fastening device, comprising: a control device for outputting to a motor to control a rotation speed of the variable speed motor.