JPH10236587A - Capper, and winding and fastening method of cap in capper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly wind and fasten a cap, by fixing a body member to a rotary shaft and inserting a support cylinder fitting a cap member at the lower side to be vertically movable end connecting a pushing-up means urging the body member to push up it to the support cylinder. SOLUTION: A rotary shaft 1 is fixed to a device body and rotated by a rotary means. The rotary means continuously rotates together with the rotating device body and a gear is engaged to mesh with a ring gear. The body member 2 is fixed to the rotary shaft 1 and formed to have a hollow cylinder. A passage 1a is formed for compressed air. The support cylinder 3 is inserted in the body member 2 so as to be vertically movable. A capping member 4 is attached to the lower side and an air source pass 11 is formed to actuate the capping member 4. A holding body 5 is rotatably fitted to the body member while regulating the vertical movement thereof by a connection member 12 and a connecting member 13 is provided at the upper part. In this way, a cap can be wound and fastened in a preset torque without winding and fastening defects caused by an abnormal friction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a capper,
The present invention relates to a capper capable of smoothly tightening a cap without applying an excessive load to a cap and a container mouth, and a cap tightening method for a capper.

[0002]

2. Description of the Related Art Conventionally, in a capper, for example, as shown in FIG. 6, a spindle 51 of a capper 50 is provided with a torque generator 52 and a chuck 54 of a cap 53 which is opened and closed by pneumatic pressure. When the spindle 51 descends, the cap 5 is moved to the container mouth.
3 is tightened with a predetermined torque.

At this time, the weight of the chuck 54 causes the cap 5 to be directly wound around the container mouth by the gravity.
3, and the upper end portion 56 of the chuck holder 55 is also subjected to pneumatic pressure for operating the chuck 54, so that the entire chuck 54 moves downward to the container mouth and the cap. A pressing force is applied.

Accordingly, when the cap itself is formed of a soft material, the cap is deformed when the screw of the cap and the screw of the container hit each other due to the weight of the chuck.
Normal screwing is not performed and biting occurs.

Further, when the container is formed of a soft material, when the cap screw and the container screw come into contact with each other, the container is bent and wound in a state where the mouth of the container is bent due to the weight of the cap and the chuck. Incorrect tightening of cap.

This is because the larger the diameter of the cap is, the larger the shape of the chuck is inevitably, and the weight of the chuck is correspondingly increased.

Furthermore, due to abnormal friction between the cap screw portion and the container screw portion, the torque reaches a preset specified value during the tightening process, and an unconfirmed tightening failure occurs. Significantly reduce surface management. And other various problems.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a body member fixed to a rotating shaft, and a cover member is attached to the body member below the body member. The supporting cylinder is vertically movably inserted, and the supporting cylinder is connected to a lifting means for urging the supporting cylinder upwardly with respect to the main body member, so that the cap and the container mouth are overloaded. It is an object of the present invention to provide a capper capable of smoothly tightening a cap without applying a cap, and a method of tightening the cap in the capper.

[0009]

Means of the present invention for achieving the above object are a rotating shaft attached to an airframe and rotated by rotating means, a main body member fixed to the rotating shaft, and a main body member. A support cylinder having a cover member attached to the lower side thereof so as to be vertically movable and a holder attached to the main body member, and the support cylinder being attached to the main body member in the holder and the support body. And a push-up means for biasing the capper to push it upward.

Then, the main body member is fixed to a rotating shaft which is mounted on the body and rotated by the rotating means, and a support cylinder is inserted into the main body member so as to be vertically movable, and a cover is provided below the support cylinder. In the capper to which the member is attached, the support cylinder is pushed up with respect to the main body member by push-up means linked to the support cylinder, and the weight of the support cylinder and the cover member and the downward external force applied to the support cylinder are reduced. And the cap is tightened around the mouth of the container.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a capper and a method of 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, a 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 above-mentioned capper A is, as shown in FIGS. 1 and 2, a holding member to which a rotating shaft 1, a main body member 2, a support cylinder 3, and a cover member 4 are attached. 5 and lifting means 6.

The rotating shaft 1 is mounted on the body 7 and is rotated by a rotating means 8. The rotating means 8 is rotated by a motor or the like (not shown). 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 main body member 2 is fixed to the rotating shaft 1 and is formed in a hollow cylindrical shape, and is provided with a passage 1a through which pressurized air from an air pressure source flows.

The support cylinder 3 is inserted into the main body member 2 so as to be movable up and down, and a cover member 4 is attached to a lower side of the support tube 3. A pneumatic source passage 11 for operating the cover member 4 is provided. Is provided.

The cover member 4 grips the cap c and tightens it around the mouth of the container b. The cover member 4 is fixed to the lower end of the support cylinder 3 to transmit the rotation (turning) operation of the support cylinder 3. And the gripping mechanism of the cap c is a link
A conventional type such as a mechanical type using a wedge or the like, a vacuum type, an air tube type, or the like is used, and a signal for gripping and releasing is given through an external control system. A wedge operated in the centripetal direction was used.

In the first example shown in FIGS. 1 to 3, the above-mentioned holding body 5 is mounted on the main body member 2 such that the vertical movement is restricted by a connecting member 12 such as a bearing, and the holding body 5 is rotatable. The connecting member 13 is provided on the upper part.

A clutch plate 15 is attached to the main body member 2 via an attachment body 14 at an upper portion corresponding to the connecting member 13 so that the clutch plate 15 is always urged downward. A pressure adjusting means 23 provided with a coil-shaped spring 16 is additionally provided.

A protrusion 17 such as a key is provided on the inner side of the mounting body 14 to which the clutch plate 15 is mounted, and the protrusion 17 is engaged with a groove 18 provided in the main body member 2. The clutch plate 15 is free to move in the axial direction, and the rotation of the clutch plate 15 in the rotational direction is transmitted to the support cylinder 3 via the main body member 2.

Therefore, when the cap c held by the cover member 3 is made to correspond to the mouth of the container b, the spring 1
When the rotation of the rotating shaft 1 is equal to or greater than the friction torque set between the connecting member 13 and the clutch plate 15 due to the pressure of 6, the pressure is released when the pressing force equal to or greater than the set pressure is applied.
Since the connecting member 13 and the clutch plate 15 slip to restrict the rotation transmission, the cap c is wound around the container mouth by a predetermined torque, and the type of the cap c and the container b By changing the spring pressure according to the type or the material of the container, a good work result can be obtained as appropriate.

The push-up means 6 is linked to the support tube 3 and urges the support tube 3 so as to constantly push it upward with respect to the main body member 2. Of the support cylinder 3 and the cover member 4 by balancing the weight of the support cylinder 3 and the pneumatic pressure (external force) applied to the upper end surface 3a of the support cylinder 3 by the compressed air supplied to perform the gripping operation of the cover member 4. Of the cover c due to abnormal friction between the screw of the cap c and the screw of the container b in the cover due to the weight and the air pressure of the cover.

In the first embodiment shown in FIGS. 1 to 3, the structure is of a spring type utilizing the elasticity of a spring. A coil spring 22 is mounted on a support piece 21 provided on the lower side of the body 5.

The support piece 21 is provided with a stopper 21a for regulating the bottom dead center when the support cylinder 3 is lowered, and the spring receiver 20 comes into contact with the stopper 21a. The regulation is made.

In the capper A according to the embodiment of the present invention, the rotating shaft 1 can be moved up and down by an elevating means 25. A spiral groove 27 having a predetermined inclination is formed on the outer peripheral portion of a cylindrical body 26 provided on the body 7. The rotary shaft 1 is inserted into this spiral groove 27
The movable piece 28 engaged with the spiral groove 27 moves up and down at a predetermined timing with the rotation of the machine body 7.

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

Therefore, the capper A of the embodiment of the present invention and the method of tightening the cap in the capper according to the first example are as follows. First, the body 7 of the capper A is rotated in one direction at a predetermined speed. The holding body 6 of the rotating shaft 1 suspended from the body 7 is controlled to be lifted and lowered by a lifting / lowering means 25 by a predetermined cam curve while being continuously rotated in one direction by a rotating means 8 as the body 7 rotates. The cap c is gripped by the cover member 4, and the filled container b is supplied onto the table 29 of the machine body 7.

When the cover member 4 is further lowered by the elevating means 25, the cap c gripped by the cover member 4 corresponds to the opening of the container b, and the cap c is temporarily tightened and fully tightened, or A series of windings is performed.

At this time, the support cylinder 3 is lifted upward by the lifting means 6, and the weight of the support cylinder 3 and the cover member 4 and the air pressure of the compressed air applied to the upper end surface 3 a of the support cylinder 3 are determined by this. Since the balance is made by the lifting means 6, as shown in FIG. 3, the weight of the support cylinder 3 and the cover member 4 is not applied to the cap c corresponding to the mouth of the container b.

In this state, if pressurized air for operating the cover member 4 is supplied from the passage 1a of the rotary shaft 1, the pressurized air pressurizes the support cylinder 3 and, along with it, Since the side cover member 4 is pushed down, the engagement between the screw of the cap c and the screw of the container b is made smooth, and the rotation torque of the rotating shaft 1 reaches the friction torque set in the pressure adjusting means 23. Then, the rotation of the rotating shaft 1 slips and excessive rotation is suppressed, and the tightening of the cap c is completed at the mouth of the container b by the specified torque.

Therefore, an excessive pressing force is not applied to the screw of the cap c and the screw of the container b, and even if the cap c and the container b are formed of a soft material, the cap may be deformed or the cover may be covered. Due to the weight of the member 4, poor tightening of the cap c, which is tightened with the mouth of the container b bent, does not occur.

Further, even if the diameter of the cap c increases and the weight of the cover member 4 increases, or the weight decreases as the diameter decreases, the lifting force of the lifting means 6 is simply adjusted appropriately. Can be handled by operation.

This spring type lifting means 6 is also used for a capper A as shown in FIG.

In the basic structure of the capper A, the rotating shaft 1, the main body member 2, the support cylinder 3, the holding body 5 to which the cover member 4 is attached, and the lifting means 6 are the same as those described above. They are configured in substantially the same manner and exhibit similar functions and effects.

The pressure adjusting means 23 has a configuration in which the slip plate 15 is pressed against the connecting member 13 by a predetermined adjusted air pressure to obtain a friction torque.

Next, as a second example of the lifting means 6 in the capper A of the embodiment of the present invention, a pneumatic type as shown in FIG. 5 is used.

The air chamber 30 is provided on the outer periphery of the support cylinder 3 inside the holder 5 provided below the main body member 2.
Is formed, and a predetermined pressure-adjusted air is supplied from a supply passage 32 to a piston 31 that is fixed to the support cylinder 3 and moves in the air chamber 30, so that the support cylinder 3 and the cover member 4 are provided.
And the compressed air supplied to perform the gripping operation of the cover member 4 balances the air pressure applied to the upper end surface 3 a of the support cylinder 3.

[0038]

According to the present invention constructed as described above, when the cap is wound around the container, no excessive load is applied to the cap and the mouth of the container. The cap is tightened according to a predetermined torque without causing poor tightening due to abnormal friction, so that there is a special effect that a uniform covering process can always be performed.

[Brief description of the drawings]

FIG. 1 is a schematic front view of a capper according to an embodiment of the present invention, which employs a method of tightening a cap in a capper, with a main part cut away.

FIG. 2 is a front view showing a main part of the capper in FIG. 1;

FIG. 3 is an explanatory view showing a cover state of a capper in FIG. 1;

FIG. 4 is a sectional view showing another example of the capper pushing-up means in FIG. 1;

FIG. 5 is a cross-sectional view showing still another example of the capper lifting means in FIG.

FIG. 6 is an explanatory view showing a main part of a conventional capper.

[Explanation of symbols]

 Reference Signs List A Capper b Container c Cap 1 Rotary shaft 2 Main body member 3 Support cylinder 4 Covering member 6 Push-up means

Claims (2)

[Claims] 1. A rotating shaft attached to a body and rotated by a rotating means, a main body member fixed to the rotating shaft, and a cover member attached below the main body member so as to be vertically movable. A supporting cylinder, a holding body attached to the main body member, and push-up means for urging the holding cylinder and the supporting body to push the supporting cylinder upward with respect to the main body member. Characterized by a capper. 2. A body member is fixed to a rotating shaft which is mounted on a body and rotated by a rotating means, and a support cylinder is inserted into the body member so as to be movable up and down, and a lid is provided below the support cylinder. In the capper to which the member is attached, the support cylinder is pushed up with respect to the main body member by a lifting means linked to the support cylinder, and the weight of the support cylinder and the cover member and the downward external force applied to the support cylinder are reduced. A cap-closing method for a capper, wherein the cap is wound around the mouth of the container by balancing the caps.