JPH10236588A - Capper, and seaming method of cap in capper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To uniformly, securely, and stably seam a cap onto a container opening by a preset specified torque. SOLUTION: A seaming body 2 is rotatably supported on a rotary shaft 1 by a support member 11. A connecting body 3 in which the seaming body 2 and the rotary shaft 1 are separably connected by a connecting means 13, is provided. A copping holder 4 is rotatably inserted into the lower side of the body 2. And a main fastening means 5 connecting to one side parts of the capping holder 4 and rotating the capping holder in the seaming body 2. And a capping member 6 for caps (c) is fitted to the capping holder 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a capper capable of securely tightening a cap with a specified torque and a method of tightening the cap in the capper.

[0002]

2. Description of the Related Art Conventionally, in a capper, an apparatus for tightening a cap to a container mouth with a specified torque has been known.
For example, the one shown in FIG. 6 is known.

This is a spindle 5 which is driven to rotate.
0, a tightening shaft 5 having a chuck body 51 attached thereto.
2, a thrust plate 53 is attached to the upper part of the winding shaft 52, and the thrust plate 53 is constantly urged downward by the spring 54 to the spindle 50, that is, the thrust plate 53 A connection plate 55 that is pressed against the 53 at a predetermined pressure is provided. The spindle 50 and the chuck body 51 are integrally formed by frictional contact between the thrust plate 53 and the connection plate 55. I have.

[0004] As a result, by continuously rotating the spindle 50, the cap 56 gripped by the chuck body 51 is screwed to the threaded portion at the base of the container, and the rotating shaft 50 is rotated.
When the cap 56 is turned by the rotation of, the cap 56 is screwed along the screw to its limit.

When the screwing of the cap 56 reaches the limit point, the rotational torque of the spindle 50 becomes greater than the pressing and holding force of the spring 54, so that the connecting plate 55 slips with respect to the thrust plate 53, Excessive tightening torque is not applied to the cap 56.

[0006] However, the connection between the spindle 50 and the chuck main body 51 is made by the connection plate 55 and the thrust plate 5.
The frictional connection with the screw 3 causes the capping torque set in advance to fluctuate due to wear of the connection surface due to aging and a rise in the temperature of the frictional contact point. Shortage may occur and result in defective products.

Further, in this apparatus, the temporary tightening and the final tightening of the cap 56 are sequentially performed by rotating the spindle 50, and excessive torque is applied before the slip due to the rotational inertia force. In particular, in the present rotary capper, the spindle 50 is rotated by using the rotating power of a rotating body that hangs a large number of chuck bodies. Therefore, if the rotation of the rotating body is increased to increase the processing capacity, This phenomenon becomes more remarkable.

Therefore, when excessive torque is applied,
The peripheral surface of the cap may be scratched, or shavings may be generated, resulting in defective products, or abnormal wear of the gripping rubber on the chuck side. And other various problems.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and has a supporting member rotatably supported on a rotating shaft by a support member. A connecting body is provided so that the shaft can be freely connected to and separated from the shaft by a connecting means. In connection with the side portion, a main fastening means for rotating the lid holding member is provided, and by attaching the lid member of the cap to the lid holding member, the tightening of the cap around the container opening is preset. It is an object of the present invention to provide a capper that can be uniformly, reliably and stably performed by a specified torque, and a method for tightening a cap in the capper.

[0010]

According to the present invention, there is provided a rotating shaft which is attached to an airframe and rotated by rotating means, and is rotatably inserted concentrically onto the rotating shaft. And a connecting body for transmitting the rotation of the rotating shaft to the main body when the main body is supported by a supporting member provided on the body, and the main body and the rotating shaft can be freely connected to and separated from each other by connecting means. A cover holding member concentrically and rotatably inserted below the tightening main body, and a cover holding member provided on the tightening main body and linked to one side of the cover holding member to rotate the cover holding member. The capper is provided with: a main fastening means to be closed; and a cover member of a cap attached to the cover holding member.

A rotating shaft, a main body for tightening provided on the rotating shaft via a connecting body, a cover holding member provided on the main body for tightening and suspending a cover member of a cap; In the capper to which the screw cap is attached to the container mouth consisting of the main fastening means linked to the lid holding member and tightened, in a state where the rotating shaft and the main body of the tightening are connected,
The cap is temporarily fastened to the opening of the container by the rotation of the rotating shaft. A method for tightening a cap in a capper for tightening.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a capper and a method for tightening a cap in the capper according to the present invention will be described with reference to the drawings.

A capper A, which is an apparatus to which the method according to one embodiment of the present invention is applied, is used in a processing line in the industry of filling and packaging a liquid such as a chemical, a detergent, food or the like in a container b. The screw cap c is attached to the mouth of the container b, and can be continuously and automatically performed in a short time in a large amount. For example, the screw cap c is used in a rotary-type closed capper as shown in FIG.

The basic structure of the capper A is, as shown in FIGS. 1 to 3, a rotating shaft 1, a winding main body 2, a connecting body 3, a cover holding member 4, a main tightening means. 5
And the cover member 6.

The rotating shaft 1 is mounted on the body 7 and is driven and rotated by rotating means 8. The rotating means 8 rotates the body 7 by a motor (not shown). With the rotation, the gear 9 is continuously and interlockedly rotated at a predetermined speed, and a gear 9 attached to an upper portion of the rotating shaft 1 is meshed with a ring gear 10 fixed to the body 7.

The above-mentioned winding main body 2 is rotatably inserted into the rotating shaft 1 concentrically and is rotatably attached to the supporting member 11 by the supporting member 11 provided on the body 7. It is fixed inside and supported.

The connecting member 3 allows the main body 2 and the rotary shaft 1 to be freely connected to and separated from each other by connecting means 13 and transmits the rotation of the rotary shaft 1 to the main body 2 at the time of connection.
When these two transmissions are performed, the cap c is temporarily tightened by the cover member 6, and the outer cylinder 14 is attached to the support member 11 so as to enclose the main body 2 to be tightened. , A connection means 13 is provided therein.

The connecting means 13 includes a supply path 15 for pressurized air serving as a driving source, and a moving chamber 1 connected to the supply path 15.
6, a clutch plate 19 attached to the piston 17 via a bearing 18, a connecting member 20 provided at the lower end of the main body 2 corresponding to the clutch plate 19, and a clutch plate. And a connecting member 23 comprising meshing members 21 and 22 provided on the connecting member 19 and the connecting member 20.

The clutch plate 19 and the connecting member 20
A coil-shaped spring 24 is provided between the first and second positions so that the clutch plate 19 is always urged downward.

Further, a protruding body 25 such as a key is attached to the inside of the clutch plate 19, and this protruding body 25 is
The clutch plate 19 is free to move in the axial direction, and the rotation of the clutch plate 19 in the rotational direction is transmitted to the tightening main body 2 via the receiving cylinder 12 by engaging with the groove 26 provided in the clutch plate 19.

The above-mentioned cover holding member 4 is composed of
A shaft-shaped member that is concentrically and rotatably inserted into the lower side of the shaft is used, and is provided via final fastening means 5 described later. The member 6 is fixed.

The above-mentioned final fastening means 5 is provided on the lower side of the main body 2 for tightening, and is linked to one side of the lid holding member 4.
The cover holding member 4 is rotated, and the final tightening is performed up to a specified torque after the above-described temporary tightening.

For example, a pneumatic rotary actuator as shown in FIG. 1 and FIG. 4 is used, and in other means, a numerically controllable servomotor, other rotating means, etc. may be used. Can be.

The rotary actuator type final fastening means 5 has the cover holding member 4 penetrated into the closed frame 27, and the pressure receiving blade 28 projects from one side of the cover holding member 4. A stopper 29 for limiting the movement limit of the blade 28 is provided in the frame 27.

Further, passages 30 and 31 for supplying and discharging pressurized air are connected to the inside of the frame body 27, and
Are connected to flow paths 30b and 31b provided on the rotating shaft 1 via flow paths 30a and 31a formed in the inside of the rotary shaft 1.

The above-mentioned cover member 6 grips the cap c and tightens it around the mouth of the container b. The cover member 6 is fixed to the lower end of the cover holding member 4 and rotates (rotates) the cover holding member 4. The operation is transmitted, and a conventional mechanism such as a mechanical type using a link or a wedge, a vacuum type, an air tube type, or the like is used as a gripping mechanism of the cap c, and an external control system is used. A signal for gripping or gripping release is given. In this embodiment, a wedge type operated in the centripetal direction by air is used.

In the capper A according to the embodiment of the present invention, the rotating shaft 1 can be moved up and down by the elevating means 32. A spiral groove 34 having a predetermined inclination is formed on the outer peripheral portion of the cylindrical body 33 provided on the body 7. The rotary shaft 1 is inserted into the spiral groove 34.
The moving piece 35 engaged with the spiral groove 34 moves up and down at a predetermined timing with the rotation of the body 7.

The caps c are fed from a cover supply means (not shown), are held one by one by cap support means, and are turned by a rotating means such as a cam, so that the cover member 6 is moved. Delivered in the raised standby state.

According to the apparatus A and the method of the embodiment of the present invention configured as described above, first, the body 7 of the capper A
Is rotated in one direction at a predetermined speed, whereby the cover member 6 of the rotary shaft 1 suspended from the body 7
Is continuously rotated in one direction by the rotating means 8 with the rotation of the body 7, while the lifting means 32
The cap c is gripped by the cover member 6, and the filled container b is supplied onto the table 36 of the machine body 7.

When the cover member 6 is further lowered by the lifting / lowering means 32, the cap c gripped by the cover member 6 corresponds to the mouth of the container b, and after the cap c is temporarily tightened, The final fastening step is performed by another final fastening means 5.

First, in the temporary fastening step, in the state shown in FIG.
When pressurized air is supplied from the supply path 15 into the moving chamber 16,
The piston 17 is raised by the pressurized air.

As a result, the clutch plate 19 rises via the bearing 18 against the spring 24, and as shown in FIG.
As shown in (b), the connecting member 2 fixed to the rotating shaft 1
0, and the clutch plate 19 and the connecting member 20
The engagement members 21 and 22 of the coupling member 23 provided in the above are separated and the coupling is released.

Therefore, the rotation of the rotating shaft 1 is controlled by the connecting means 1
At 3, the power is transmitted from the connecting member 20 to the clutch plate 19 and to the receiving cylinder 12 and the tightening main body 2 via the protruding body 25 such as a key. The cover holding member 4 rotates the cover member 6 so that the cap c is screwed into the screw portion at the mouth of the container b, and a predetermined temporary fastening step is performed.

At this time, the blade 28 in the final fastening means 5
Is in contact with the stopper 29 at the limit of movement in the winding direction, and does not hinder rotation.

In the temporary fastening step, the moving chamber 1
The pressurized air supplied to 6 is controlled to a predetermined pressure, and a temporary tightening torque for the cap c is set. When the tightening of the cap c reaches the temporary tightening torque, the pressurized air is connected to the clutch plate 19. Slip occurs with the member 20 so that the rotation of the rotary shaft 1 is not transmitted to the main body 2.

After the temporary fastening step is completed, the final fastening step of the cap c is performed by the final fastening means 5 in the same machine.

First, the supply of pressurized air from the supply path 15 is stopped while the cap c is gripped by the cover member 6 and the moving chamber 16 is evacuated. The plate 19 is lowered, and the engaging members 21 and 22 of the connecting member 23 are connected, and FIG.
As shown in (a), the rotation of the tightening main body 2 is restricted by the protrusion 25 of the clutch plate 19 that engages with the groove 26 of the receiving cylinder 12.

In this state, when pressurized air is supplied to the passage 30 through the flow paths 31a and 30a, the blades 2 in the frame 27
8, the cover holding member 4 is rotated, whereby the cover member 6 fixed to the lower portion of the cover holding member 4 is rotated, and the cap c is further turned to perform a final tightening step. You.

At this time, the pressurized air supplied to the passage 30 is controlled to a predetermined pressure, and the final tightening torque of the cap c is set. At this time, the rotation of the cover holding member 4 is stopped, so that no excessive tightening torque of the cap c is applied.

In addition, in the final fastening step, since the rotation angle of the cover holding member 4 is small (for example, the rotation angle is small, for example, 30 to 60 °), the cover holding member 4 rotates. Inertia torque is also less likely to be applied to the cap c,
Winding is always performed with a constant (regulated) torque.

Since the final fastening means 5 is provided in the rotary type capper A and is driven by a drive system different from the rotational drive of the body 7, even if the rotation speed of the body 7 changes, the container b There is no change in the tightening torque of the cap c.

Before releasing the cap c of the cover member 6, the air in the passages 30 and 31 is cut off and exhausted, and then the cap c of the cover member 6 is released. By supplying the pressurized air on the side of the passage 31, the next cap c is prepared for tightening.

The capper A shown in FIG. 5 shows an example in which the temporary tightening step and the final tightening step are performed by separate machines (rotating shafts 1 and 1 are different) when the cap c is wound. In the case shown in FIG.
Is used for the temporary fastening step linked to the rotating shaft 1, and the case shown in (b) is for the final fastening step where the fastening means 5 is linked to the rotating shaft 1.

Since these structures are the same as those in the above-described example, and their functions and effects are similarly exhibited, detailed description thereof is omitted, and the temporary fastening step shown in FIG. After this, the final fastening step shown in FIG.

In use, for example, if the machine for the temporary fastening process and the machine for the final fastening are arranged side by side on the line, or both machines are arranged at a predetermined interval, a series of cover processing is performed. .

[0046]

According to the present invention constructed as described above, the temporary tightening and the final tightening of the cap are performed by separate drive systems, respectively, and the final tightening means manages the winding torque. The cap is tightened according to the applied torque, so that a uniform covering process can always be performed.

In addition, when the tightening torque is controlled by the final tightening means, the torque can be easily adjusted each time the cover processing is changed, and the entire apparatus can be manufactured at low cost. And so on.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing an apparatus of an embodiment of a capper employing a cap winding method according to the present invention.

FIG. 2 is a front view showing each operation example in which a main part of a connecting portion in FIG. 1 is broken.

FIG. 3 is an explanatory view showing a schematic capper in the apparatus shown in FIG. 1;

FIG. 4 is a schematic explanatory view showing the fastening device of FIG.

FIG. 5 is an explanatory diagram showing a machine in which a temporary fastening step and a final fastening step are separately configured in the apparatus in FIG. 1;

FIG. 6 is a partially cutaway front view showing a closing torque setting mechanism used in a conventional cap tightening machine.

[Explanation of symbols]

 Reference Signs List A capper b container c screw cap 1 rotating shaft 2 main body of tightening 3 connecting body 4 lid holding member 5 final fastening means 6 lid member 11 support member 13 connecting means

Claims (2)

[Claims] A rotating shaft attached to the body and rotated by a rotating means; a winding main body concentrically and rotatably inserted into the rotating shaft and supported by a support member provided on the body; A connecting body that allows the tightening main body and the rotating shaft to be freely connected to and separated from each other by connecting means, and that transmits the rotation of the rotating shaft to the main body when the connection is established, and is rotatably inserted concentrically below the main body for tightening. A cover holding member, a main fastening means provided on the main body for tightening and linked to one side of the cover holding member to rotate the cover holding member, and a cover for a cap attached to the cover holding member. A capper comprising: a member; 2. A rotating shaft, a winding main body provided on the rotating shaft via a connecting body, a lid holding member provided on the winding main body and suspending a lid member of a cap, A screw cap is attached to the container mouth consisting of the main fastening means linked to the lid holding member, and the screw cap is attached and tightened. Temporarily tightening the cap, and after completion of the temporary tightening, the connection between the rotating shaft and the main body of the winding is released, and the lid holding member is rotated by the final tightening means to perform the final tightening. Cap winding method.