JPH0820379B2 - Container rotation mechanism - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a container rotating mechanism, which can rotate the container reliably and stably.

(Technical Background of the Invention and Problems Thereof) The market for synthetic resin containers, particularly PET (polyethylene terephthalate) containers, continues to expand, centering on large soft drink containers. Recently, the need for heat-resistant multilayer containers has increased, and research and development have been promoted accordingly. A general synthetic resin container (including heat-resistant multi-layer container) manufacturing method will be described with reference to FIGS. 3A to 3D. First, the parison 1 is manufactured by an injection molding machine (not shown) ( FIG. 3 (A)), then grip the mouth of the parison 1 in the mold 2 of the stretch blow molding machine (not shown) (FIG. 3 (B)), and perform stretch blow molding (FIG. 3 (A)). 3 (C)), the container 3 having a predetermined shape can be obtained (FIG. 3 (D)).

However, it is necessary to judge the quality of the performance of the heat-resistant multi-layered container produced by the above-mentioned method, and the criterion is to judge as good if the heat-resistant resin is uniformly present in the whole heat-resistant multi-layered container. .

As a conventional determination method, there is a visual check, but there is a drawback in that it cannot be determined when the main resin and the heat-resistant resin have the same color or are transparent. In addition, although destructive inspection by sampling can judge pass / fail, the heat-resistant multi-layer container has more unstable factors in manufacturing than a single container, and there is a risk of sudden failure, so reliability is high. There was a problem such as lacking in.

Therefore, the present applicant has developed an inspection method and apparatus that utilize the property that the main resin is superior in ultraviolet transmittance of a specific wavelength to the heat-resistant resin.

FIG. 4 is a perspective view of the schematic configuration of the inspection device, and FIG. 5 is a sectional side view of the structure of the sensor unit.

This inspection device 20 is a mercury / xenon lamp (not shown).
A light source device 21 for generating ultraviolet rays and visible light, and connected to the light source device 21 to collect the ultraviolet rays and visible rays.
A light projecting portion 23 having a quartz fiber 22 for light for transmission having a diameter of 2 mm, a quartz fiber 24 for a detector having a diameter of 1 mm for receiving the projected light, and a light guide having a guide 25 for supporting the quartz fiber 24 for a detector. And part 26. Here, the reason for using the mercury / xenon lamp as the light source is to increase the amount of ultraviolet light. Further, when the tips of the silica fiber 22 for light and the silica fiber 24 for detector are aligned with each other, it is not visible only by ultraviolet rays, but visible light is emitted, which can be easily performed. In addition, a certain wavelength (35
(0 ± 10 nm) is transmitted through an interference filter 27, a sensor section 29 including a photoelectric conversion type gallium-phosphorus element 28 that receives the ultraviolet rays and visible rays, and a tip of a cable 30 extending from the sensor section 29. Is provided with a determination unit 31 including an amplifier (not shown) and a determination circuit (not shown). In the molding process, if there is a heat-resistant resin layer on the upper end of the mouth of the container, it means that the heat-resistant resin layer exists on the entire container. This can be achieved by measuring over the temperature and obtaining the distribution state of the heat resistant resin layer. In general, the mouth of a container is often provided with a screw for sealing with a cap, and it is not possible to measure at the screw part, but the rubber packing inside the cap is immersed in the container. The measurement is performed using a cylindrical shape having no threaded portion at the upper end of the mouth of the container which is provided for the purpose of enhancing the sealing effect. However, as shown in FIG. 6, the silica-based fiber 22 for light and the silica-based fiber for detector are used.
When 24 and 24 are arranged in a straight line using the visible light,
The light emitted from the light source device 21 is projected through the light silica fiber 22, is narrowed by the slit 32, and is radiated to the upper end 33 of the mouth of the container 3 rotated by the container rotating device 34. Then, the light transmitted through the upper end 33 of the mouth is received by the silica fiber 24 for the detector, and is extracted to a specific wavelength (350 ± 10 nm) by the interference filter 27 in the sensor 29, and the light of this specific wavelength is gallium. The gallium-phosphorus element 28 generates a voltage when detected by the phosphorus element 28, and this voltage is amplified by the amplifier and input to the determination circuit to determine the quality of the container 3 (Japanese Patent Application No. 61-289864). reference).

However, in order to perform accurate measurement, a mechanism that reliably holds the container 3 and smoothly rotates it is necessary. However, conventionally, there was no inspection method and device as described above, and there was no rotation mechanism of the container 3 that could cope with this, which was a problem.

(Object of the Invention) The present invention has been made under the circumstances described above,
It is an object of the present invention to provide a container rotation mechanism that reliably grips a container and enables smooth rotation.

(Summary of the Invention) The present invention relates to a rotating mechanism for a container, which includes two rotatable rollers and one drive roller for gripping the brim of the mouth of the container at three points, and the rotatable roller. Two roller support rods which are provided with rollers at one end and which can be opened and closed to the left and right to take in the collar of the mouth of the container, a mechanism for opening and closing the two roller support rods to the left and right, and the container And a mechanism for rotating the drive roller for rotating the drive roller.

Embodiments of the Invention Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 (A) shows a plan view of a main part of a rotating mechanism for a container of the present invention, and FIG. 1 (B) shows a side view thereof.

The container support mechanism 48 has one set of a shaft 50 having a drive roller 49 for rotating the container 3 and two sets of roller support rods 52 having a rotatable roller 51, and a rotation shaft 61 of the roller support rod 52.
Has two sets of roller support rods 52, 52 fixed on a base 62 so as to sandwich the shaft 50. So, three rollers 49,51,
51 are arranged in a triangle, the rotary gear 53 is fixed to the upper part of the drive roller 49, and the table is provided above the table 62.
Drive gear 58 connected to output shaft 57 of motor 56 on 65
It is supposed to mesh with. The roller support rod 52 has a rotating shaft 61.
It has a three-pronged shape centered on, and has a rotatable roller 51 at one end, an opening / closing roller 63 at the other end, and a spring 64 at the other end. An air cylinder 66 and a core rod 67 are fixed to the base 62 behind the opening / closing roller 63.

 Next, the operation of the above embodiment will be described.

The air cylinder 66 operates, the core rod 67 moves to the left in the figure, and pushes the two open / close rollers 63, 63 to move the two roller support rods 52, 52 around the roller rotation shaft 61. Spread to the left and right. Then, when the collar 60 at the mouth of the container 3 enters between the two roller support rods 52, 52, the air cylinder 66 operates again and the core rod 67 moves to the right in the figure. Then, the spring 64 is restored and the two roller support rods 5 centered on the roller rotation shaft 61.
2, 52 are closed, and the constricted portions of the three rollers 49, 51, 51 grip the brim 60 at the mouth of the container 3. Here, when the motor 56 is started, the drive roller 49 is rotated via the output shaft 57, the drive gear 58, and the rotary gear 53, and the frictional force thereof causes the container 3 and the two rotatable rollers 51, 51 to rotate.

This rotation is performed by supporting the upper portion of the container 3 at three points, so that the container 3 can be reliably gripped and a stable rotating operation can be performed while maintaining an accurate vertical posture.

For the rotation transmission described above, a belt is used instead of the gear, and a hydraulic cylinder is used instead of the air cylinder 66.
Further, an air cylinder may be used instead of the spring 64, and there is no particular limitation.

2A and 2B show the above-mentioned inspection device 20.
2A and 2B are a plan view and a side view of a schematic configuration of a container rotation device including a rotation mechanism 48. The container rotating device 34 has conveyor belts 35, 35 for loading and unloading the container 3, and conveyor belt rollers (not shown) arranged at the ends thereof, and the shafts 37, 37 of the conveyor belt rollers are provided. Pulley 38,38
A belt 44 is wound around the pulley 43 on the output shaft 42 of the speed reduction mechanism 41 of the motor 40 in the main body 39 to drive the conveyor belts 35, 35.

A mechanism 45 for rotating the container 3 is provided between the two conveyor belts 35, 35, and a rotation shaft 46 that rotates by using the motor 40 and the speed reduction mechanism 41 described above is provided in the mechanism 45. A rotary disc 47 is fixedly attached to the rotary disc 47 and is rotated integrally with the rotary shaft 46. On the circumference of the rotating disk 47, there is one set of shafts 50 having drive rollers 49 and roller support rods 52 having rotatable rollers 51 at 90 ° intervals.
Four sets of container support mechanisms 48, 48, 48, 48, which are configured as a set, are fixed. The three rollers 49, 51, 51 are arranged in a triangle, and the rotary gear 53 is provided above the drive roller 49 located on the inner peripheral side.
Is stuck. Furthermore, the rotary shaft is located above the rotary disk 47.
It has a shaft 54 that is stopped without being affected by the rotation of 46, and a stop disk 55 is fixed to the shaft 54.
A motor 56 is fixed on the circumference of 90 ° on the left side of the stop disc 55 (90 ° in the rotating direction of the rotating disc 47 with the carrying-in direction of the conveyor belt 35 being 0 °), and its output shaft 57. The end drive gear 58 is provided so as to mesh with the rotary gear 53. Furthermore, at the 90 ° position on the left side, an L-shaped sensor support rod 59
Is suspended above the main body 39, and the silica fiber 22 for light, the silica fiber 24 for detector having a guide and the slit 32 are fixed to the above-mentioned positions (see FIG. 6) at the tip thereof. .

 Next, the operation of the above embodiment will be described.

The container 3 is placed on the conveyor belt 35, and the motor 40 is activated to rotate the drive roller (not shown) to move the container 3 in the direction of the arrow in the figure. Then, the roller support rods 52, 52 of the container support mechanism 48 open to the left and right to receive the container 3, the mouth flange 60 is sandwiched by the three rollers 49, 51, 51, and together with the rotary disc 47, the direction of the arrow in the drawing When rotated by 90 °, the rotary gear 53 meshes with the drive gear 58. When the inspection device 20 descends along the sensor support rod 59 to a fixed position at the upper end of the mouth of the container 3 and the motor 56 is started, the rotation thereof is performed via the drive gear 58 to the rotation gear 53.
Is transmitted to the fixed drive roller 49, and the frictional force rotates the container 3 and the two rotatable rollers 51, 51. This rotation is performed by supporting the upper portion of the container 3 at three points, so that the container 3 can accurately maintain its vertical posture, and its rotating operation is stably performed. In response to such movement, the inspection device 20 makes the above-described measurement.
After the measurement is completed, the inspection device 20 rises along the sensor support rod 59, the container 3 again rotates 90 ° in the arrow direction together with the rotating disk 47, and the roller support rods 52, 52 open left and right to open the container 3. And moves it in the direction of the arrow in the figure. The above operation has been described with respect to one container, but when the containers are continuously conveyed, the above operation is continuously repeated.

Further, the rotating mechanism can be used not only in the container inspection device described above but also in, for example, a container foreign matter inspection device, and the device is not particularly limited.

(Effects of the Invention) As described above, according to the container rotating mechanism of the present invention, since the upper part of the container is supported at three points, the container can be reliably gripped. Further, it becomes possible to perform stable rotation while maintaining an accurate vertical posture.

[Brief description of drawings]

FIGS. 1 (A) and 1 (B) are a plan view and a side view showing an outline of a container rotation mechanism for realizing the present invention, and FIGS. 2 (A) and 2 (B) are container inspection devices to which the present invention is applied. The top view and the side view which show the outline of the container rotating device provided with, FIG. 3 (A)-(D) is a figure which shows the manufacturing method of a synthetic resin container, 4th.
FIG. 5 is a perspective view showing an outline of a container inspection device, FIG. 5 is a sectional side view showing a sensor portion, and FIG. 6 is a side view showing an inspection method by the container inspection device. 1 ... Parison, 20 ... Inspection equipment, 22 ... Quartz fiber for light, 24 ... Quartz fiber for detector, 34 ...
… Container rotation device, 48… Rotation mechanism.

Claims (1)

[Claims] 1. A container mouth having two rotatable rollers and one drive roller for gripping the collar of the mouth of the container at three points, and the rotatable roller at one end. Two roller support rods which can be opened and closed to the left and right for taking in the brim, a mechanism for opening and closing the two roller support rods to the left and right, and a drive roller for rotating the container. And a mechanism for rotating the container.