JPH0543598B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a screw cap applied to a cap of a container product.

[Conventional technology]

Figures 5 to 7 show the invention described in Publication of Utility Model Publication No. 57-3998, and in the figure, 10 is an outer case of this air chuck 6, and 11 is a case screwed into the upper end of this outer case. Holding tube, 12
is an air chuck mounting tube whose lower end is screwed into this case holding tube and which extends upward.The upper end of these case members is supported by the rotating body 5, and is rotated and driven up and down via a gear mechanism, a cam mechanism, etc. (not shown). It is becoming more and more common.

13 is an inverted cup-shaped chuck case, 14 is an annular gripping member made of an elastic member such as rubber and inserted into the lower end opening of the chuck case, and 15 is a Teflon sheet 16 and a seal 17 to hold this gripping member. A presser cap screwed onto the chuck case 13 from below through the
8 is a compression disk placed on the gripping member 14;
The gripping member 1 is gripped by an annular raised portion 18a provided on the periphery of the lower surface.
4, a pressure chamber 19 is formed between the chuck case 13, and compressed air is introduced into the pressure chamber 19 to deform the gripping member 14 by compressing the compression disk 18, as will be described later. A cap (not shown) inserted into the center hole 20 can be gripped. In addition, 21
2 shows a tapered hole provided in the presser cap 15 to guide the cap into the center hole 20.

The chuck case 13 has a shaft portion 22 extending upwardly screwed and fixed into a hole at the lower end of a chuck guide 23, and this chuck guide 23 has an upper end reduced diameter portion 24 and a longitudinal groove 25 (see FIG. ), and a lower side part with an annular support part 26 projecting thereon, and the annular support part 26 is screwed onto the lower end of the outer case 10.
On the slope receiving surface 28 of the chuck case 13,
The entire chuck member including the chuck guide 23 etc. is supported by its own weight. Reference numeral 29 denotes a slip washer which is inserted into the intermediate portion by inserting an inner protrusion 30 into the longitudinal groove 25 of the intermediate portion, and numeral 31 holds this slip washer from above and below and connects the protrusions 32 on both outer sides to the longitudinal groove 33 on the inner side of the outer case 10. The slip ring 34 is a spring tensioned between the upper slip ring 31 and the flange of the upper adjustment nut 35, and the adjustment nut 35 is screwed into a threaded cylinder 36 hanging down from the case holding cylinder 11. 37 for positioning. Therefore, the slip washer 29, which is held between the two slip rings 31, is pressed against the upper surface of the case cover 27 by the adjusted spring force of the spring 34, so that the slip washer 29 absorbs the rotational force transmitted from the outer case 10 side. Slip washer 2 against chuck guide 23
The cap can be transmitted until it overcomes the required frictional force on the upper and lower surfaces of the container 9, and for example, when closing the container opening, the cap can be closed with the required tightness against the container opening. Furthermore, even if the cap is stuck to the container mouth for some reason when opening the container, the rotation of the outer case 10 is not transmitted to the chuck member due to the slip of the slip washer 29, and there is no risk of damaging the chuck member.

Next, the upper end reduced diameter portion 24 of the chuck guide 23 is
is slidably inserted into the hole 39 of the supply cylinder 38 from below, and the supply cylinder 38 is connected to the air supply passage of the rotating body 5 via the ventilation cylinder 40 with a rotary joint. . The compressed air fed through the ventilation pipe 40 is connected to the internal passage 41 of the supply cylinder 38 and the reduced diameter portion 2 so that the lower end of this passage communicates with the internal passage 41 of the supply cylinder 38.
The shaft portion 2 of the chuck case 13 is connected to the shaft portion 2 of the chuck case 13 through an annular groove 42 formed on the outer periphery of the chuck case 13, and a passage 43 that opens into the annular groove 42 and passes through the shaft center portion of the chuck guide 23.
The air is sent to an air chamber 44 on top of 2.

Reference numeral 45 designates a detection rod whose upper end is integrally formed with a piston portion 46 inserted into the air chamber 44, and which is slidably connected to the shaft portion 22 and the guide shaft 47 of the compression disk 18 screwed into the lower end thereof. The grip member 14 extends through the grip member 14 and has its lower end protruding into the center hole 20 of the grip member 14. 48 is a spring that presses down the piston portion 46; 49 is a communication hole provided in the piston portion 46;
Reference numeral 50 indicates an air passage bored in the shaft portion 22 so as to communicate the lower surface side of the piston portion 46 with the pressure chamber 19 on the side not connected to the communication hole, and 51 indicates a vent hole provided on the compression disk 18 to connect the upper end thereof. The detent pin 52 of the compression disk 18 fitted into the shaft portion 22 is a contact plate against which the top surface of the cap is to abut. Therefore, when the lower end of the detection rod 45 is pushed up against the spring 48 by a cap (not shown), the compressed air in the air chamber 44 is brought into communication with the communication hole 49 and the air passage 50 by the rise of the piston part 46. , through these into the pressure chamber 19, and the compression disk 18
The gripping member 14 is deformed by the pressure and the gripping operation is performed. When the cap is not present, the detection rod 45 does not operate, and the spring 48 causes the piston portion 46 to come into close contact with the upper surface of the shaft portion 22, cutting off communication between the communication hole 49 and the air passage 50, and causing the gripping member 14 to perform a deforming action. There is nothing I can do.

Further, reference numeral 53 denotes a support pin whose tip end is loosely fitted into the feed cylinder 38 and is screwed into the case holding cylinder 11.The support pin 53 is used as a fulcrum to support the feed cylinder 38, and therefore the chuck guide 23 and the chuck case below it. The chuck members such as 13 are made freely movable, and for this reason, a clearance e is provided in advance between the feed cylinder 38 and the case holding cylinder 11. In this way, since the chuck member is movable in each direction in the horizontal plane using the support pin 53 as a fulcrum, even if the molding of a container such as a bottle is uneven, the chuck member can adapt well to the irregularities and open/close as desired. The valve can be operated without any trouble.

In this type of apparatus, the bottle is transferred onto a rotating table by means of a timing screw and a star wheel (not shown). The rotating body 5 shown in FIG. 5 rotates synchronously with a rotating table (not shown). The air chuck 6 rotates as a planet of the rotating body 5.

After the bottle is transferred onto the rotary table, the air chuck 6 descends and grips the cap of the bottle, and the air chuck 6 tightens the cap by rotation until the end of one revolution of the rotating body 5. The air chuck 6 is raised again and the container is transferred onto the conveyor by the discharge star wheel.
In this way, the air chuck 6 rotates itself as it moves up and down, and the mechanism of the air chuck 6 is as shown in FIG.
and a presser cap 15 to hold them.
It is made up of. By introducing compressed air into the pressure chamber 19, the compression disc 18 is compressed, deforming the annular gripping member 14, gripping the cap inserted into its center hole 20, and attaching it to the threaded part of the bottle. Tighten along.

[Problem that the invention seeks to solve]

(1) In order to tighten the cap via the annular gripping member 14 made of an elastic member, the member 14 must be repeatedly compressed and deformed, and there is a limit to the wear resistance of the member 14.

(2) Since compressed air is used to compress and deform the member 14, the structure is complicated and adjustment is inconvenient.

(3) Maintenance and inspection must always be paid attention to, and the complicated mechanism causes high costs.

[Means for solving problems]

(1) A multi-split chuck is wrapped around a spring, and its force can be used to hold the cap after it is inserted.

(2) A groove similar to the vertical groove of the screw cap is provided on the inner circumference of the chuck to facilitate seaming.

(3) A protruding mechanism was installed in front of the bottle to prevent hanging.

(4) The grip of the cap can be adjusted by adjusting the lock nut.

(5) Since there is no compressed air circuit, the structure is simple and maintenance is easy.

[Effect]

The annular chuck holder descends and pushes the sloping part on the outer circumference of the chuck, causing the lower end of the chuck to contract.
The cap held in the chuck is gripped so that it can be tightened. As the entire lid tightening device rotates, the chuck rotates while gripping the cap, thereby tightening the cap, etc. After winding is complete, a push-down device pushes the cap out of the chuck.

〔Example〕

In FIGS. 1 to 4, the holding cylinder 131 screwed into the mounting cylinder 120 further includes a stopper 132.
It is screwed together and becomes one body. A spring receiver 133 is attached to the holding cylinder 131 so as to be slidable up and down. A chuck retainer 134, which is screwed into the spring receiver 133 via a lock nut 135, is attached so as to be adjustable in the vertical direction. The lower portion of the chuck presser 134 has a tapered portion 134a that decreases in diameter toward the center.

Compression spring 1 that presses the spring receiver 133 downward
36 is in contact with the lower end of the lock nut 137,
In order to adjust the pressing force of the spring 136, a lock nut 137 is screwed into the holding cylinder 131. The flange 132a of the stopper 132 receives the pressing force of the compression spring 136 via the spring receiver 133, and at the same time receives the pressing force of the compression spring 136 via the slide key 139.
8 vertical sliding is possible.

The chuck support 140 is threadedly engaged with the sleeve 138, and supports a plurality of chucks 141 (four in this embodiment) made of steel so as to be swingable about a shaft 142. The inner periphery of the chuck 141 is provided with saw-shaped irregularities 141a that are the same as or similar to the outer circumferential longitudinal grooves of the screw cap 152, as shown in FIG.
is formed. An elastic ring 143 such as a tension spring is wound around the outer periphery of the chuck 141.
1 provides elastic force to hold the screw cap 152. A plurality of shafts 144 are vertically slidably inserted into the holding cylinder 131 and are fixed to a receiving plate 145 with setscrews 146. support 14
7 is threadedly engaged with the shaft 144, and the center rod 148
It is integrated with. A compression spring 149 is installed between the support 147 and the sleeve 138 to constantly urge the support 147 upward. center rod 1
Stopper member 1 that serves as a stopper for the 48 and as a lid holder
50 is fixed to the lower end of the center rod 148 by a pin 151. 152 indicates a screen capture.

In addition, the inner cylinder is held by the holding cylinder 131 and the stopper 132.
The shaft 144, the receiving plate 145, the set screw 146, the support 147, the center rod 148, the stop member 150, and the pin 151 serve as the pressing device, and the sleeve 138, the chuck support 140, the chuck 141, the pin 142, and the elastic ring 143 serve as the gripping device. The spring receiver 133, the chuck holder 134, and the lock nut 135 constitute an outer cylinder, respectively. Reference numeral 153 denotes a presser roller supported by a main body frame (not shown), which contacts the upper surface of the receiving plate 145 and regulates the position of the presser in the height direction.

Further, by connecting a drive means (for example, a timing pulley, etc.) and a variable torque motor (for example, a servo motor) (not shown) to the mounting tube 120, the tightening torque of the cap 152 is maintained constant.

Next, the operation of this device will be explained; Cap 1 supplied from a chute (not shown)
52 is inserted into the center hole 154 of the chuck 141 using an insertion device (not shown), and the elastic ring 14 is inserted into the center hole 154 of the chuck 141.
3, the chuck 141 is swung outward against the
The saw-shaped unevenness 141a of the chuck 141 securely holds the cap 152 in the state shown in FIG.
At this time, the plurality of chucks 141 are each urged toward the center by the contraction force of the elastic ring 143. When the screw cap 152 is inserted into the chuck 141, the inner diameter of the chuck 141 in its free state is expanded by the insertion force of the cap 152, and the screw cap 152 is inserted below the stopper member 150.

Bottle 1 fed onto a rotating table (not shown)
55 and the center position of the cap 152 held by the chuck 141 are aligned, then the mounting tube 12
Cap 1 held on chuck 141 is lowered by a cam (not shown) to the head of bottle 155.
Insert 52.

As shown in FIG. 2, as the mounting tube 120 descends (the presser roller 153 also descends),
At the same time as the cap 152 digs deeply into the chuck 141, the inner periphery of the tapered portion 134a begins to touch the outer periphery of the chuck 141 at point A.
The repulsive force of the compression spring 136 causes the chuck 14 to
1, the diameter of the hole formed by the inner periphery of the chuck 141 is reduced, and the gripping force of the cap 152 is increased to a certain level. This gripping force can be adjusted by a lock nut 135. Next, the mounting tube 120 is rotated by a gear (not shown), and the cap 152 is tightened along the threaded portion of the bottle 155 to a certain tightening torque. Furthermore, bottle 155
From the time when the head of the cap 152 comes into contact with the cap 152,
The stop member 150 stops descending, and only the chuck presser 134 continues to descend.

After completing the tightening of the cap 152, the mounting tube 12
0 starts to rise, but at this time the stopper 132
attempts to lift the sleeve 138 through the flange portion. However, since the receiving plate 145 is restricted from rising by the presser roller 153, the sleeve 138, chuck support 140,
Only the chuck 141 rises while deflecting the compression spring 149.

Therefore, the cap 152 and the bottle 155 are relatively pushed out from the chuck 141 by the stopper member 150, and no hanging phenomenon occurs.

In addition, when changing the type of cap, chuck support 140, chuck 141, elastic ring 143,
This can be easily handled by replacing the chuck presser 134.

In addition, the lower end of the stopper 132 and the chuck support 14
By loading a compression spring between the upper ends of the
The presser roller 153 only needs to be attached within the range described above.

〔Effect of the invention〕

When changing the type of cap, it can be easily attached and detached by replacing the chuck support, chuck, chuck holder, etc.

(b) Since the main parts to be tightened are made of steel, the service life will be further extended.

By mechanically swinging the hatch, the structure is simple and adjustment is easy. (Air pressure leaks and air pressure management adjustments are no longer required.) D. Costs can be reduced because the number of parts is reduced.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing the cap holding state in an embodiment of the cap tightening device of the present invention, Fig. 2 is a sectional view of the same as the above showing the cap tightening state, Fig. 3 is a - sectional view of Fig. 2; The figure is a - sectional view of FIG. Fig. 5 is a schematic front view of the conventional device, Fig. 6 is a vertical sectional view of the same air chuck, and Fig. 7 is a schematic front view of the conventional device.
FIG. Inner cylinder: 131... Holding cylinder, 132... Stopper, gripping device: 138... Sleeve, 140...
Chuck support, 141... Chuck, 142...
Pin, 143...Elastic ring, outer cylinder: 133...Spring holder, 134...Chuck holder, 135...Lock nut, 153...Press roller, pressing device: 14
4... Shaft, 145... Reception plate, 146... Set screw, 147... Support, 148... Center rod, 1
50...stopping member, 151...pin.

Claims (1)

[Claims] 1 Screw cap 152 with outer circumferential longitudinal groove
A lid tightening device for tightening a bottle onto the head of a bottle 155 includes a vertical mounting cylinder 120 that can be raised and lowered and rotated with a constant torque, and a mounting cylinder 120 that is disposed on the same axis below the mounting cylinder 120. An integrally connected annular stopper 132 and the stopper 1
a sleeve 138 fitted inside the stopper 132 so as to be movable up and down with respect to the stopper 132 and non-rotatable;
saw-shaped unevenness 141a that is the same as or similar to the outer circumferential longitudinal groove of the screw cap 152 formed on the inner circumferential surface of the chuck 141, and an inclined surface that expands downwardly formed on the outer circumferential surface of the chuck an annular chuck retainer 134 that moves up and down together with the mounting tube 120 and engages with the outer peripheral inclined surface of the chuck 141;
an elastic ring 143 that biases the chuck 141 inward; a compression spring 149 that biases the chuck 141 downward;
The screw cap 152 is held in the center hole 154 by a stopper member 150 that is maintained at a predetermined height regardless of whether the screw cap 150 is raised or lowered, and a presser roller 153 that maintains the stopper member 150 at a predetermined height. In this state, the chuck 141 is lowered to the head of the bottle 155, the mounting cylinder 120 is rotated, and the screw cap 152 is tightened around the bottle head, and the upper surface of the screw cap is held down by the stopper member 150. to raise chuck 141 and raise chuck 14.
1 and a screw cap 152 are separated from each other.