JPS601246B2 - Pneumatic transportation device for soft plastic hollow molded products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a method of continuously manufacturing large quantities of soft plastic hollow molded products (internally sealed with gas) such as containers and dolls obtained by blow molding singing quality polyethylene and other European plastics. The present invention relates to a pneumatic transportation device for transportation.

It is generally known that pneumatic transport is effective as a high-speed transport method for goods, and conventionally hard plastic goods were transported serially through a transport pipe using a method similar to pneumatic transport. It was.

However, the surface of soft plastic hollow molded products (hereinafter referred to as "sensitive plastic products") is easily damaged due to mutual contact during transportation, and also due to high-speed contact with the inner surface of transportation equipment including transportation pipes, so-called polycloth This not only taints the entire transportation device, but also leaves scratches on the surface, reducing the value of the product, and especially in the case of food containers, it gives consumers the impression that even the contents are unsanitary.

Furthermore, the generated polycloth causes air pollution, and special equipment is required to prevent it from being released into the atmosphere, making air transportation of European plastic products technically and economically difficult. They were deemed unemployable. For this reason, European-quality plastic products are transported using conventional batch transport equipment, that is, after blow molding, they are stored in cardboard boxes, etc., and then loaded onto transport vehicles, etc., and transported to a temporary storage location near the place of use. Transporting, piling up and storing, and then carrying and unpacking cardboard diagrams, taking out soft plastic items, etc., requires many people and many people to work in a large space, resulting in a lot of wasted work, making it impossible to reduce transportation costs. There it was.

The present invention provides a transport device that can solve these problems all at once, and goes beyond the serial transport of soft plastic products to achieve random mass transport using large-sized transport pipes.

The feature of the present invention is that European plastic products are transported as long as possible distance in a floating state through a transport pipe whose inner surface is lined with a rubber material in order to prevent scratches and to prevent polycross from occurring in the transport pipe. In order to continuously maintain this mass transportation, a large amount of supply is carried out commensurate with the amount of transportation.

The transportation device of the present invention includes a lorry vehicle equipped with a large-capacity storage chamber, an extraction transfer device connected to the storage chamber that has a built-in belt conveyor, and an ejector without an air nozzle installed in the extraction transfer device. It is composed of a transport pipe whose inner surface is lined, and a device that controls the driving source of the belt conveyor according to the pressure inside the transport pipe on the ejector side, and it is a transport system that does not inhale contaminated outside air from the storage chamber to the transport pipe. It constitutes a system.

One embodiment of the present invention will be described below with reference to the drawings. 1 is, for example, about 45,000 soft plastic containers p (
A lorry serves as a transportation storage device for storing objects (hereinafter referred to as "objects to be transferred"), and its storage chamber 2 has a plurality of container input ports 3 at the top, and the rear end can be connected to a receiving port described below. Equipped with a relatively large-diameter discharge port 4 and a pressurized air supply port 5,
The entire housing chamber 2 is configured to be able to rotate and tilt with respect to the truck 2' using the lower rear end as a fulcrum.

This lorry accommodates a large amount of containers at a container manufacturing site, etc., and travels to the receiving port 8 of the extracting and transferring device 7.

A large-diameter discharge port 4 connected to the storage chamber of the lorry is connected to an intake port 8', so that the storage chamber is rotated and tilted and pressurized air is supplied from the air supply port 5.

In the storage chamber, the containers are brought into a semi-floating state by the pressurized air, and in particular, the lower containers are discharged into the receiving port without being subjected to the stacking load of the containers themselves, and therefore with little mutual friction.

26 is an air amount control valve.

The containers discharged into the receiving port 8 are conveyed from 15 to
It is extracted at a rate of 20 pieces/second and introduced into the feed pipe 12' of the jet tank 12. Reference numeral 15 denotes a suction air amount adjusting port of a radiator provided in a part of the feed pipe 12', and is equipped with an air purifying filter.

The container introduced into the ejector 12 slides on the inclined guide plate and is blown into the transport pipe 14 through the discharge port 12b by the high-speed airflow from the transport air blowing row 2a below.

The closed area of the air inlet 12a is varied by an adjustment plate 12c whose position can be adjusted along the inclined guide plate, and the flow rate and flow velocity of the transport gas are adjusted in conjunction with the opening degree of the air valve 13.

In the transport pipe, the hollow containers are airlifted randomly in parallel in a floating state, as shown in FIG. 2, because the apparent volume of the hollow containers is small due to the enclosed gas.

Therefore, even if it comes into contact with the tube wall during transportation, in the present invention, the inner surface of the transportation tube is lined with a rubber cushioning material 30 that is softer and more elastic than the plastic material of the hollow container, for example, with a chloroprene rubber sheet. The transport gas flow rate and flow rate are adjusted primarily to minimize damage to the surface of the hollow container. It is preferable to maximize the average flight distance of the containers in the transport pipe.The behavior of containers in the transport pipe is complex, and the number of containers per unit volume/time at a certain point in the transport pipe is When the pressure increases, the primary pressure increases.

This phenomenon is a sign of blockage in the pipe, and in the present invention, a pressure detector is provided near the ejector side of the transport pipe, and the rotation of the drive motor 9 of the conveyor of the extraction and transfer device is controlled by the detection output. A control device 28 is provided.

As a result, if the density of containers in a part of the transport pipe 14 continues and the pressure inside the pipe increases, the rotation speed of the motor 9 is reduced to suppress the amount of containers supplied (the amount taken out) and prevent blockages in the transport pipe. It is prevented. Although the cross-sectional shape of the transport pipe is arbitrary, by making it square in cross-section, it becomes easy to open and close one side, which is convenient for inspection, cleaning, and repair.

Furthermore, the cross-sectional area of the pipe should preferably have a diameter that allows efficient random parallel transport of the objects to be transported. The containers transported at high speed through the transport pipe are placed into receiving hoppers 17 and 18, which serve as storage tanks.

16 is a switching branch pipe, 19 is an air discharge port, and 21 is an alignment transfer device for transferring containers one by one from below the hopper to, for example, a filling device.

23 is a suction filter, 24 is a transportation blower, 2
A secondary air filter 5 supplies pressurized clean air to the lorry and the ejector.

As described above, according to the present invention, a container of a soft plastic hollow molded product housed in a movable storage chamber can be discharged in a semi-floating state under pressure inside the chamber with pressurized gas, and the soft plastic hollow molded product can be discharged from the inside of the room under pressure. Similar to the transport pipe, a conveying airflow flows within the extraction and transfer device that forms part of the product container transfer path, and the belt conveyor built inside this is also driven in the same direction, so mechanical transfer is not possible. It is possible to extract the European plastic hollow molded container surface, which is extremely susceptible to external damage, without applying excessive external force. Since the transport pipe is transported by flight and the transport pipe wall has a buffering effect on the transported goods, not only does the surface of the European-quality plastic hollow molded product not be damaged, but also a large amount of transport capacity can be achieved, which is completely unimaginable with conventional equipment.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of the apparatus of the present invention, FIG. 2 is a longitudinal sectional view of a transport pipe, FIG. 3 is a partial sectional view of the main part of the ejector, and FIG. 4 is a side view of the ejector on the discharge side. 1 is a lorry, 7 is an extraction transfer device, i2 is an ejector, 14 is a transport pipe, 17 and 18 are receiving hoppers. Fig. 1 Fig. 2 Fig. 3 Fig. 4

Claims (1)

[Scope of Claims] 1. A storage chamber which is mounted on a lorry and accommodates a large amount of soft plastic hollow molded products, is provided with a large-diameter discharge port and a pressurized air supply port, and is tilted with the discharge port facing downward; An extraction and transfer device has an inlet to which a discharge port is connected and includes an upwardly inclined belt conveyor, and an air amount adjustment port with a filter is connected to the extraction and transfer device, and pressurized gas is supplied to the extraction and transfer device. The inner surface of the ejector into which the soft plastic hollow molded product is fed from the ejector and the transport pipe connected to the ejector is lined with a rubber-based cushioning material that is softer and more elastic than the soft plastic hollow molded product. A transport pipe having a pipe diameter that allows a plurality of soft plastic hollow molded products to pass in parallel in a floating state within the pipe, and a control device that controls the driving source of the belt conveyor based on the output of a pressure detector inside the transport pipe. 1. A pneumatic transport device for a soft plastic hollow molded product, characterized in that it does not inhale contaminated external air during transport. 2. Claim 1, wherein at least a portion of the inner surface of each of the storage chamber, extraction and transfer device, ejector, and hopper of the lorry is lined with a rubber-based cushioning material.
Pneumatic conveyance device as described in Section.