JPS6045111B2 - gripper for bottles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gripper for holding the head of a bottle or the like when performing processing such as powder coating on the bottle.

Glass bottles for carbonated drinks such as cola, cider, and beer can break due to increased internal pressure due to sunlight, etc. To prevent this, it is required that the outer surface of the bottle be covered with synthetic resin. .

One method to achieve this goal has been proposed by electrostatically coating the outside of the bottle with synthetic resin powder and then heating it to form a strong coating that adheres to the outside. Powders have also been developed. However, in this case, if even a small amount of synthetic resin powder adheres to the top of the bottle during the powder coating process, the sealing of the contents with the bottle cap will be incomplete, which is a fatal problem for the bottle. Therefore, when performing powder coating, a reliable means is required to prevent resin powder from adhering to the top of the bottle.
Further, the upper end of the coating formed on the top of the bottle is required to form a clear boundary for both reasons of durability of the coating and commercial value of the bottle.

In order to achieve the above requirements, gas is ejected into the head of the bottle.
Other devices have been proposed for adhesion of resin powder using suction, suction, or a combination thereof, but it is desirable to develop new means that are more reliable in terms of reliability in long-term operation, formation of clear boundaries, etc. ing.

In order to solve the above-mentioned problems, the present inventor previously filed a Japanese Patent Application No. 51-7546 in which, as shown in FIG. A gripper for a bottle is proposed in which a mechanism for opening and closing the rocking piece 7 by relative movement is configured to grip or release the bottle head 5 via the elastic cap 4.

The present invention further improves this proposal by providing a bottle head press plate at the lower end of the shaft 2, or by providing a bottle head press plate at the lower end of the shaft that loosely fits in the center of the shaft 2. This makes it possible to stabilize the relative position between the gripper and the bottle when the bottle is gripped, and to easily position the bottle at any intermediate position between the gripped state and the released state. It is designed so that it can be constructed by hand.

These improvements have made it possible to completely prevent resin from adhering to the top of the bottle during electrostatic coating, to form a clear boundary at the top of the bottle coating powder layer, and to prevent resin from adhering to the gripper after electrostatic coating. The present invention proposes a bottle holding device which also facilitates the removal of resin powder. An embodiment of the present invention will be described with reference to the drawings. In FIG. 2, a shaft 2 is inserted into a cylindrical arm 1, a support 3 is formed at the lower part of the cylindrical arm 1,
Furthermore, an elastic cap 4 is coupled to the lower part of the cylindrical arm 1.

Further, the head of the swinging piece 7 is pivotally attached to the lower platform 6 of the shaft 2 with a pin 8, and furthermore, the bottle head pressing plate 5 is fixed to the lower end of the shaft 2.

The elastic cap 4 includes an inner cylinder 10 continuous to the lower part of the outer cylinder 9, an upper wall 11 at the upper part of the inner cylinder 10, and an annular tightening part 12 projecting inward on the inner periphery of the lower part of the inner cylinder 10. establish.

This tightening part 12 contacts the outer peripheral surface of the bottle and tightens the bottle around the entire circumference. There is. A protrusion 14 that engages with the support 3 is formed on the upper part of the swing piece 7, and a skirt 15 whose circumference is divided into four equal parts is formed on the lower part.

Note that the skirt 15 is limited to four equal parts of the circumference, but not five.

To explain how this invention is used, the upper part of the cylindrical arm 1 is connected to a chain (not shown) to move it in one direction.

Although the cylindrical arm 1 is not shown, it is pushed up in the direction of arrow A1 by a cam plate 4, and the protrusion 14 of the swinging piece 7 is pulled up by the support 3 as shown in the right half of FIG. , rocking piece 7
rotates in the direction of arrow A7 against the elasticity of the elastic cap 4, and the lower part of the elastic cap 4 becomes open. When the top of the bottle 17 enters the inside of the elastic cap 4 and is pushed down by the cylindrical arm 1 force plate in the direction opposite to the arrow A1 in FIG. The top of the saw bottle 17 is gripped by the elasticity of the elastic cap 4 after being untied. At this time, when the bottle is pushed upward, the bottle head 18 comes into close contact with the bottle holding plate 5 via the upper wall 11 of the inner cylinder of the elastic cap, and the relative position between the gripper and the bottle 17 is always kept at a constant position.

Also, at this time, the tightening part 12 of the elastic cap 4 fits into the bottle 17, that is, the lower part of the protrusion 18 on the bottle head, and securely grips the bottle 17, thereby reliably preventing powder from entering the inside of the gripper. This state is shown in the cross-sectional view of the left half of Fig. 2. In this state, the elastic cap 4 grips the bottle 17, and the resin 7 powder is applied to the surface of the bottle 17. As explained above, if the cylindrical arm 1 is pushed up in the direction of the arrow A1 to the state shown in the cross-sectional view of the right half of FIG.
A clear boundary layer 16a is formed at the upper end of the bottle 17, and the bottle 17 is removed from the elastic cap 4. In addition, if the pushing up of the cylindrical arm 1 in the direction of arrow A1 is stopped sufficiently, but slightly,
The cap 4 is not fully opened, and the bottle head is loosely gripped within the cap 4, allowing the bottle 17 to hang down due to its own weight, but the height of the stand on which the bottle 17 is placed By adjusting , it is possible to adjust this hanging distance to an arbitrary position.

Furthermore, when the cylindrical arm 1 is pushed up sufficiently and the cap 4 is opened, the bottle is released from the gripper. It is also possible to put it in between. In the above two conditions, when the suction nozzle is brought close to the lower end of the cap 4 and the bottle 17 is pressed against the bottle head 18 and rotated together with the clipper, the powder resin coated on the bottle head 18 is removed by suction.
The boundary with the resin powder coating layer can be made clear, and the resin powder that has gone around and landed on the upper part of the bottle head 18 when it is released into the tightening part 12 can also be removed. It becomes possible to manufacture high-quality resin-covered bottles without resin adhering to unnecessary parts.

FIG. 3 further shows a second invention, in which a bottle head pressing plate 5a is fixed to the lower end of a coaxial shaft 2a that is loosely fitted into the shaft 2, and the shaft 2a is not shown in the figure. The cam mechanism, which does not have a cam mechanism, allows it to move up and down independently of the cylindrical arm 1 or shaft 2, and presses the bottle head 18 only when necessary.

In the figure, the cross-sectional view of the left half shows the bottle 17 being gripped. The cross-sectional view of the right half shows the state in which the cap 4 is opened and the pressing plate 5a is pressing the bottle head 18. With the structure as described above, the operation of pressing down the bottle head 18 with the press plate 5a while gripping the cap 4,
Operations such as opening the cap 4 and pushing down the bottle head to an arbitrary position can be performed as needed.

Further, the action of the bottle pressing plate 5a is more remarkable than in the case shown in FIG. In addition to the operation and effect, the bottle head 18 can be lowered as shown in the cross-sectional view of the right half of FIG.
A gap is created between the outer peripheral surface of the bottle and the tightening part 12, and the powder paint enters through the gap, and even if it adheres to the bottle head 18, the adhering resin powder is further completely removed by the suction nozzle. be able to.

Only by raising and lowering the shaft 2 or the cylindrical arm 1 can the elastic cap 4 securely grip the head of the bottle 17.

After covering the head of the bottle 17 with the elastic cap 4, the bottle 17 is
When a large number of the grippers of the present invention are connected to a chain and suspended, and the elastic cap 4 is not loaded with a bottle, the swinging piece 7 is able to hold the outer cylinder. 9. Since the inner cylinder 10 and the upper wall 11 are completely sealed, resin powder does not adhere to the swinging piece 7. The effects of the first invention and the second invention described above are summarized as follows. 1. The elastic cap has an annular tightening section that protrudes inward from the lower inner circumference of the inner cylinder, so when the elastic cap grips the bottle, the bottle is supported while being tightened by the tightening section.

Therefore, the boundary between the part of the bottle covered with the elastic cap and the part of the bottle not covered is located on the same circumference, so that a clear boundary layer can be formed at the upper end of the powder layer. Moreover, since the tightening part is in complete contact with the outer periphery of the bottle over its entire circumference, there is no room for powder paint to enter through the gap between the tightening part and the outer periphery of the bottle.

Therefore, it is possible to prevent powder paint from adhering to the top of the bottle or from entering the inside of the bottle. 2. The elastic cap is integrally composed of an outer periphery, an inner cylinder, and an upper wall, and the skirt of the rocking piece is inserted into the gap between the outer cylinder and the inner cylinder, so the rocking piece etc. are completely sealed. .

Therefore, even if the bottle is operated and sent into the powder coating booth without being placed in the elastic cap, the powder coating will be prevented from entering the inside of the booth, and the powder will not be deposited on the rocking piece etc. It can prevent body paint from adhering.

3. In the first invention, a bottle head pressing plate is further provided at the lower end of the shaft. By gripping the bottle with the pressing plate in contact with the tip of the bottle head through the upper wall, the elastic cap can be You can always hold the bottle in a fixed position.

Therefore, the position of the boundary layer in each bottle can be made equal.

4 In addition to the above-mentioned effects, the second invention further provides a coaxial shaft that is loosely fitted into the shaft, and a bottle head pressing plate is provided at the lower end of the coaxial shaft, so that the cylindrical arm or shaft can move the pressing plate up and down independently.

Therefore, since the bottle head can be pressed at any desired vertical position, the bottle head can be pressed and lowered further in any state in which the elastic cap is opened or closed.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of a conventional example, FIG. 2 is a vertical cross-sectional view showing one embodiment of the present invention, and FIG. 3 is a vertical cross-sectional view showing another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Cylindrical arm, 2... Shaft, 2a... Coaxial center shaft, 2a... Coaxial center shaft, 3... Support, 4... Elastic cap, 5, 5a... Bottle Head pressing plate, 7... Rocking piece, 8... Zen, 9... Outer cylinder, 10
...Inner cylinder, 11...Top wall, 12...Tightening part, 14
... Protrusion, 15 ... Skirt, 16 ... Powder layer,
17...Bottle.

Claims (1)

[Claims] 1. A support 3 and an elastic cap 4 are fixed to the lower end of the cylindrical arm 1, and the elastic cap 4 is integrally constituted by an outer cylinder 9, an inner cylinder 10, and an upper wall 11, An annular tightening part 12 protruding inward is formed at the lower part of the inner periphery of the inner cylinder 10, and a swinging piece 7 is pivotally attached to the lower part of the shaft 2 which is loosely fitted into the cylindrical arm 1. 7 is engaged with the support 3, and the skirt 15 of the swinging piece 7 is connected to the outer cylinder 9 and the inner cylinder 10.
The bottle head pressing plate 5 is inserted into the gap between the shaft 2 and the lower end of the shaft 2.
Gritsup for bottles. 2 A support 3 and an elastic cap 4 are fixed to the lower part of the cylindrical arm 1, and the elastic cap 4 is attached to the outer cylinder 9, the inner cylinder 10, and the upper wall 1.
1, an annular tightening part 12 protruding inward is formed at the lower part of the inner periphery of the inner cylinder 10, and a swinging piece 7 is formed at the lower part of the shaft 2 which is loosely fitted into the cylindrical arm 1. The shaft is attached to the
The protrusion 14 of the swinging piece 7 is engaged with the support 3, and the skirt 15 of the swinging piece 7 is connected to the outer cylinder 9 and the inner cylinder 10.
Insert the coaxial center shaft 2 into the shaft 2.
A gripper for a bottle is provided with a bottle head press plate 5a at the lower end of the coaxial shaft 2a, and a bottle head press plate 5a is loosely fitted into the coaxial shaft 2a.