JPH0520682B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a bottle-shaped container inspection device for inspecting a nozzle portion of a bottle-shaped container, particularly a bottle-shaped container made of plastic.

[Prior art] In the manufacturing process of bottle-shaped containers, shaping and processing are performed depending on the type of container, but sometimes the shaping is not sufficient, or the processing is not completed completely. In some cases, defects such as tilting of the entire container or tilting or deformation of the nozzle portion may occur. These defects are
This may make it difficult to insert the supply nozzle that fills the contents into the container nozzle, making it impossible to fill the contents, as well as impairing the beauty of the container and reducing its commercial value, or causing damage to the crown, cap, etc. This was a cause of poor sealing.

For this reason, in the manufacturing process of bottle-shaped containers, an inspection step is provided to inspect the inclination and deformation of the nozzle portion, and the inclination and deformation of the nozzle portion are inspected here. These various inspections are generally carried out immediately after the processing process where the defects to be inspected are likely to occur, and these inspections are usually carried out either visually by humans or by using score gauges that are sampled at predetermined intervals. This was due to a test using .

[Problems to be solved] As mentioned above, in the conventional nozzle inspection method for bottle-shaped containers, the inspection is performed by human visual observation or sampling inspection, so it is not possible to accurately and quickly inspect all products of bottle-shaped containers. There was a problem that I was told could not be done.

The present invention has been made in view of the above-mentioned problems, and provides a nozzle inspection device for bottle-shaped containers that can quickly and accurately inspect the necessary nozzle portions of bottle-shaped containers for all products. With the goal.

[Means for Solving Problems] In order to solve the above problems, the nozzle inspection device for bottle-shaped containers of the present invention includes an elevating body that moves up and down with a constant stroke in the upper part of the bottle-shaped container, and elastic support on this elevating body. The sensor is configured to include a detection core formed to have a diameter somewhat smaller than the inner diameter of the nozzle portion, and a sensor that measures the relative movement of the detection core with the elevating body.

[Examples] Examples of the present invention will be described below with reference to the drawings.

Fig. 1 is a plan view showing the configuration of an inspection line including the embodiment device, Fig. 2 is a vertical cross-sectional view showing the main parts of the testing machine of the same equipment, and Figs. 3 a and b are the main parts of the neck holder part of the same equipment. FIG.

In FIG. 1, 1 is a conveyance line, and 2 is a bottle-shaped container made of blow-molded plastic.
are placed on belt conveyors 1a and 1b and conveyed continuously. 10 is a turret 110 and an inspection machine 12
This is an inspection device equipped with 0 and a network holder part 140, and is installed in the middle of the conveyance line. The transported bottle-shaped container 2 is inspected by the inspection device 10 for the presence or absence of inclination, deformation, etc. of the nozzle portion.

The inspection device 10 is attached with a supply arm 3 for feeding the bottle-shaped container 2 and a delivery arm 4 for sending it out. The supply arm 3 has four container contact parts 3.
a is formed, and this container contact portion 3a is made equal to the curvature of the container body. Thereby, the bottle-shaped container 2 can be reliably supplied to the inspection device 10 through surface contact. Note that 5 is a timing spiral that rotates in synchronization with the supply arm 3, and is provided to smoothly transfer the bottle-shaped container 2 sent by the belt conveyor 1a to the supply arm 3.

The delivery arm 4 rotates in synchronization with the rotary table 112 of the inspection device 10, and rotates in synchronization with the rotary table 112.
The bottle-shaped container is transferred to the subsequent belt conveyor 1b. The four container contact portions 4a of the delivery arm 4 are also made equal in curvature to the container body.

Note that the supply arm 3 and the delivery arm 4 are designed to be replaceable according to the shape of the bottle-shaped container 2 to be inspected.

The turret 110 constituting the inspection device has a rotary table 112 on the lower part of the central axis 111 on which the bottle-shaped container 2 is placed and rotated, and a top plate 113 having a cam 114 formed on the periphery is fixed on the upper part. However, a base body 115 that rotates in synchronization with the rotary table 112 is provided in the intermediate portion.

In FIG. 2, reference numeral 121 denotes an elevating body of the inspection machine 120, which is held by a support arm 122. 123 is a vertically movable rod, the lower part of which is the support arm 12
2, and a cam roller 124 that comes into contact with the cam 114 is provided at the top. cam 114
The inspection section (approximately between A and B) in Fig. 1 is lower as shown by the solid line in Fig. 2, and conversely, the non-inspection section (approximately between B and A) is lower than the two-dot chain line in Fig. 2. As shown in , it is getting higher.

Reference numeral 125 denotes guide shafts of the support arm 122, and two guide shafts are provided with their upper ends fixed to the base body 115 which rotates in synchronization with the rotary table 112. In addition, the vertical movement rod 12
A long hole 123a is provided in the lower half of 3, and the base body 115 is engaged with this long hole 123a to guide the vertical movement of the vertically movable rod 123.

Therefore, the elevating body 121 of the inspection machine 120 is
It descends by a fixed stroke in the inspection section, and rises by a fixed stroke in the non-inspection section.

In the elevating body 121 of the inspection machine 120, 126
127 is a hollow sliding body provided inside the elevating body 121 so as to be movable up and down, and 127 is a lid fixed to the upper part of the sliding body 126. Reference numeral 128 denotes a detection core, which is formed in a perfect circle shape that is somewhat smaller than the inner diameter of the nozzle portion of the bottle-shaped container, and is located within the hollow portion of the sliding body 126. Reference numeral 129 denotes an operating piece of the detection core 128, which is located at the upper part of the lid 127 and connected to the detection core 128 via a penetrating rod that slidably passes through the center of the lid 127.

130 is a sensor consisting of a differential transformer;
The probe 130a is in contact with the operating piece 129 of the detection core 128 inside the elevating body 121. 131 and 132 are pressing springs, and the spring 131 is the lid body 127, that is, the sliding body 1.
26 is biased downward, and the spring 132 is biasing the detection core 128 downward. 133
is a guide, and the lid body 127 (sliding body 126)
This is to allow the operating piece 129 of the detection core 128 to move up and down smoothly.

Therefore, when the elevating body 121 of the inspection machine 120 descends, if the detection core 128 enters the container nozzle, the probe 130a of the differential transformer 130 will not detect the movement of the actuating piece 129. However, if the container itself or the nozzle is tilted or deformed and the detection core 128 does not enter the nozzle of the container, the sliding body 126 and/or the actuating piece 129 will not descend. Therefore, the detection core 128 moves relative to the elevating body 121 and pushes the probe 130a of the differential transformer 130, which is descending together with the elevating body 121. This causes the differential transformer 130 to change the output signal.

FIGS. 3a and 3b show a partial longitudinal sectional view and a plan view of the neck holder part 140. FIG.

In these drawings, 141 is the support arm 12
There are two pins protruding from the lower surfaces of both sides of the pin, and the tip portions of the pins are tapered. 1
Reference numeral 42 denotes holder members which are rotatably attached to the lower ends of the two guide shafts 125, forming a pair of holder members. At the junction of the two holder members 142, there is a holding groove 1 that sandwiches the neck of the bottle-shaped container 2.
43 are integrally formed. Further, the two holder members 142 are provided with engagement holes 144 having tapered upper portions that engage with the pins 141 when the inspection device 120 is lowered.

Reference numeral 145 denotes a spring interposed between the two holder members 142, which always acts in the direction of opening the two holder members 142. In this case, pin 14
1 is located inside the engaging hole 144, and the holding groove 143 is opened until it touches the stopper 146 (as shown by the two-dot chain line in FIG. 3b).

Therefore, when the inspection device 120 is ascending, the pin 141 is not engaged with the engagement hole 144, and the holder member 1 is moved by the action of the spring 145.
42 is open, and the holding groove 143 is also open. Thereafter, when the inspection device 120 descends, the pin 141 also descends, and the tapered tip abuts the upper tapered portion of the engagement hole 144, thereby gradually guiding the holder member 142 in the closing direction. As a result, the holding groove 14
3 is also closed to hold the neck portion of the bottle-shaped container 2.

In addition, 6 in FIG. 1 is a container presence/absence detection sensor, which detects whether or not the bottle-shaped container 2 is fed into the inspection machine 120 from the supply arm 3. Further, 7 is a control section, which controls the operation of the inspection device 10 and the conveyor, arm, etc. related to this inspection device 10 based on various signals.

Next, the operation of the inspection apparatus having the above configuration will be explained.

The bottle-shaped container 2 sent by the conveyor 1a is placed at a predetermined position on the rotary table 112 of the inspection machine 120 by the supply arm 3, and is rotationally conveyed. Here, the presence or absence of a container is determined by the sensor 6, and the result is output to the control section 7. When the control unit 7 receives a signal indicating that there is no container, for example,
Processing such as ignoring all subsequent inspection data performed on pockets without containers is performed.

When the bottle-shaped container 2 is placed on the rotary table 112 and rotated, the cam 114 of the top plate 113 is lowered, and the support arm 122 of the inspection machine 120 is guided down by a fixed stroke. This results in
The two pins 141 provided on both sides of the support arm 122 engage with the engagement hole 144 while closing the two holder members 142, and the clamping groove 143 firmly holds the neck of the container 2. Hold. On the other hand, the elevating body 121 of the inspection machine 120 also descends, and at this time, unless the detection core 128 enters the nozzle of the container, the detection core 128 is prevented from descending. That is, since only the elevating body 121 descends, the detection core 128 moves relative to the elevating body 121. Therefore, the probe 130a of the differential transformer 130 that is fixed to the elevating body 121 and descends together with the elevating body 121
is pushed by the actuating piece 129 of the detection core 128.

In this way, when the output of the differential transformer 130 changes, the control unit 7 that inputs this changes the overall inclination of the bottle-shaped container (here, the overall inclination means that if the bottle itself has an inclination) Of course,
This includes tilting caused by the bottle not fitting properly into the base cup. ), or the container is determined to be defective because the nozzle part is tilted or deformed. Next, the control unit 7 sends an activation signal to a discharge device (not shown) disposed at a predetermined position to discharge the defective container when it passes the predetermined position.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and includes, for example, the following modifications.

A nozzle inspection device for bottle-shaped containers that uses a device that linearly transports containers instead of the turret that makes up the inspection device.

A nozzle inspection device for a bottle-shaped container, in which an elevating body is raised and lowered using means other than a cam, for example, a cylinder means.

A nozzle inspection device for bottle-shaped containers in which a detection core is provided outside the elevating body.

A nozzle inspection device for bottle-shaped containers that uses a sensor other than an operating transformer as a sensor.

[Effects of the Invention] As described above, according to the present invention, it is possible to automatically inspect the nozzle portion of all bottle-shaped container products. Therefore, the presence or absence of inclination or deformation of the nozzle portion of a bottle-shaped container can be quickly and accurately inspected, and the process can be shortened and the number of workers can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the configuration of an inspection line including the embodiment device, Fig. 2 is a vertical cross-sectional view showing the main parts of the testing machine of the same equipment, and Figs. 3 a and b are the main parts of the neck holder part of the same equipment. FIG. 2 is a vertical cross-sectional view and a plan view showing 10... Inspection device, 100... Turret, 120
...Inspection machine, 121...Elevating body, 126...Sliding body, 1
28...Detection core, 130...Operation transformer, 140
...Netsuku Holder Department.

Claims (1)

[Scope of Claims] 1. A device for inspecting a nozzle portion of a bottle-shaped container, comprising: an elevating body that moves up and down with a constant stroke above the bottle-shaped container; and a nozzle that is elastically supported by the elevating body; 1. A nozzle inspection device for a bottle-shaped container, comprising a detection core formed to have a diameter somewhat smaller than the inner diameter of the container, and a sensor for measuring relative movement of the detection core with an elevating body. 2. The nozzle inspection device for a bottle-shaped container according to claim 1, wherein the detection core is built in the elevating body.