JPS594328B2 - Bottles suction and pressure feeding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention utilizes the negative pressure generated on the downstream side by a jet of pressurized air to draw in bottles such as plastic bottles and aluminum cans, and also draws in bottles such as plastic bottles and aluminum cans using a flow of pressurized air. The present invention relates to a device for transporting bottles using a suction pressure feeding method.

Transportation by suction and pressure is used to transport not only bottles but also various powders and viscous fluids such as ready-mixed concrete.

Conventionally, in a suction and pressure feeding device that performs transportation using a suction and pressure feeding method, the other end of an inner tube is connected to the discharge port of the chamber on the upstream side, and the other end of the inner tube is connected to a conveying tube with approximately the same diameter as the inner tube on the downstream side and in the flow direction. When inserted into the upstream end of the outer tube, which has a tapered portion with a reduced diameter, and supplying pressurized air to the air chamber formed by the outer surface of the inner tube and the inner surface of the outer tube, the inner tube end and the inside of the outer tube Air can be supplied from the outlet in the gap with the surface, and this air supply generates negative pressure in the direction of the inner tube, and this negative pressure sucks the objects to be transported from the inner tube to the conveyor tube via the outer tube. There is a known device that can be fed under pressure.

(Special Publication No. 49-5409). However, when the above-mentioned conventional apparatus is used for transporting bottles, there is a big problem that the bottles are easily damaged by rubbing against the inner wall surface of the transport pipe during transport.

In order to solve the above-mentioned problems with conventional devices, the present inventors researched the cause and found that the inner tube and the conveying tube have approximately the same diameter, and that the outer tube has a taper that reduces the diameter in the flow direction. We discovered that a major reason for this is that we have

In other words, if the diameter of the inner tube is made too large, the negative pressure acting in the direction of the inner tube tends to be insufficient, making it difficult to draw in bottles, so the diameter of the inner tube cannot be made that large compared to the bottles. First, the bottles are sent from this relatively small diameter inner pipe via the outer pipe to the relatively small diameter transport pipe like the inner pipe, so if the bottles are slightly misaligned, part of the taper of the outer pipe may This may cause damage due to rubbing against the inner wall surface of the conveyor pipe.

Further, the tapered portion of the outer tube whose diameter is reduced in the flow direction weakens the force of the pressurized air jetted from the jet port due to frictional resistance, thereby weakening the negative pressure acting in the direction of the inner tube.

This weakening of the negative pressure prevents the bottles from moving along the axis from the inner tube to the conveying tube via the outer tube, and the bottles rub against a portion of the taper of the outer tube and the inner wall surface of the conveying tube. This has resulted in further harm to people.

The present invention provides the following features when transporting bottles using the suction pressure feeding method:
The purpose of this invention is to prevent bottles from being damaged due to rubbing against the inner wall surface of the conveyance pipe, etc., and was made based on the findings of the inventors.

The structural feature of the present invention for achieving the above object is that, in an apparatus for pneumatically transporting bottles in series, there is a supply pipe into which the bottles are fed one by one, and the upstream side has a diameter larger than that of the supply pipe. In addition, a tapered pipe whose diameter is further expanded in the flow direction and a conveying pipe having approximately the same diameter as the end is connected to the expanded downstream end, with the supply pipe on the upstream side and the tapered pipe on the downstream side. The supply pipe and the tapered pipe are surrounded by an air chamber, and the pressurized air supplied into the air chamber is passed from the gap to the axis of the tapered pipe. Bottles that are provided with a grill that guides the air in the direction of the center, and that a blade is provided in front of the grill in the air chamber so that negative pressure is generated on the upstream side of the supply pipe by the pressurized air that is supplied from the gap to the tapered pipe. The main point is that it is a suction and pressure feeding device.

According to the present invention, since the diameter of the conveying tube is larger than that of the supply tube, even if the bottles that are sent from the supply tube to the conveying tube via the tapered tube are sent slightly off-center, the taper remains intact. There is no collision with the inner wall of the pipe or conveyor pipe.

In addition, sufficient air flow can be maintained around the bottles that have been sent into the transport pipe for a long time, and the resulting air cushion effect allows the bottles to be transported along the axis of the transport pipe without rubbing against the inner wall of the transport pipe. It is possible.

On the other hand, since the diameter of the tapered pipe is expanded in the flow direction, the friction between the ejected pressurized air and the inner wall of the tapered pipe can be minimized.

This, combined with the induction of pressured air with less turbulence by the blades and grille, results in a high venturi effect, resulting in high negative pressure in the direction of the supply pipe, so that the axis from the supply pipe to the conveyor pipe is Bottles can be fed along this line, and collisions between bottles and the inner wall of the tapered pipe or conveying pipe can be more reliably prevented.

Hereinafter, the present invention will be explained in more detail with reference to the drawings showing examples.

FIG. 1 is a diagram showing an embodiment of the present invention, in which a supply hopper 7
At the supply hopper 7 side end of the conveying pipe 8 connecting the receiving can 9 and the receiving can 9,
An egiator consisting of a supply pipe 1, a tapered pipe 2, and an air chamber 3 is attached, and a blower 6
Bottles can be transported from the supply hopper 7 to the receiving can 9 by pressurized air sent from the supply hopper 7.

FIG. 2 is a diagram showing another embodiment, in which an ejector composed of a supply pipe 1, a tapered pipe 2, and an air chamber 3 similar to that shown in FIG. They are provided at three locations: the −7 side end and the intermediate portion of the conveying tube 8.

In this way, the pressurized air from the blower 6 can be supplied into the transport pipe 8 from three locations, so that even when the distance between the supply hopper 7 and the receiving can 9 is long, the bottles can be reliably transported.

FIG. 3 is a sectional view of a portion of the ejector in both of the above embodiments, FIGS. 4A and 4B are front views of the pressurized air blowing portion, and FIG. 5 is a sectional view showing another embodiment of the grill.

The supply pipe 1 is connected to the above-mentioned supply hopper 1 for each bottle.
It is constructed of a tapered pipe or parallel pipe whose diameter is reduced in the flow direction.

Normally, the supply pipe 1 is a parallel pipe in the ejector located at the end of the supply hopper 7 described in FIGS. 1 and 2, and a tapered pipe in the ejector located in the middle of the conveyance pipe 8. Become.

By connecting the air chamber 3 provided around the supply pipe 1 to the tapered pipe 2, the supply pipe 1 and the tapered pipe 2, which is adjacent to the supply pipe 1 in the coaxial direction and whose diameter is enlarged in the flow direction, are widened. are connected with a freely adjustable gap a.

Into this gap a, the pressurized air supplied into the air chamber 3 is guided in the axial direction of the tapered tube 2 from a ring-shaped full circumferential portion or a waning crescent-shaped portion as shown in FIGS. 4A and B. A grill 4 is provided to generate negative pressure in the direction of the supply pipe 1 by the Venturi effect of pressurized air blown from the gap a, so that the bottles inside the supply pipe 1 can be sucked.

In addition, there is a gap a just before the grill 4 in the air chamber 3.
A vane 5 is provided to rectify or swirl the pressurized air blown out from the pump.

The inner diameter of the joint between the supply pipe 1 and the tapered pipe 2 is the same diameter, or the diameter of the tapered pipe 2 is larger than that of the supply pipe 1. The two are located close together.

In addition, at the downstream large-diameter end of the tapered pipe 2,
A conveying pipe 8 having approximately the same diameter as the end is connected to the end.

To explain the function and effect of the device configured as above, the suction action of high-speed air ejected from the air chamber 3 through the grille 4 creates a negative pressure in the supply pipe 1, and bottles are smoothly sucked and supplied. It moves from the pipe 1 to the tapered pipe 2 and is further fed into the conveying pipe 8.

At this time, the diameter of the tapered pipe 2 is expanding in the flow direction, and the conveying pipe 8 has a larger diameter than the supply pipe 1, so even if the moving bottles are slightly deviated from the axis, the tapered pipe 2'P conveying pipe 8 There will be no collision with the inner wall.

In addition, the tapered pipe 2 has an expanded diameter in the flow direction to suppress friction with the air flow, the grille 4 adjusts the jetting direction of the pressurized air, the blades 5 straighten or swirl the jetted air, etc. A good venturi effect can be obtained by sumo.

Along with this, the negative pressure acting in the supply pipe 1 direction is also sufficient to ensure that bottles can be sucked, and the conveyor pipe 8
Bottles can be fed into the axis of the machine.

Then, around the bottles that have moved into the transport pipe 8,
Due to the relatively large diameter of the conveyance tube 8, sufficient air flow is maintained, and this air cushion allows bottles to be transported without rubbing against the inner wall of the conveyance tube 8, thereby preventing them from being damaged. It is.

When the bottles to be transported are relatively large, pressurized air is normally blown out from the ring-shaped part around the entire circumference as shown in Figure 6A, but pressurized air is blown out from the waning crescent-shaped part as shown in Figure 6B. Blow-out is preferable because the lower half of the bottle, which is most likely to rub against the inner wall of the conveying pipe 8, can be reliably floated by the air cushion, and the pressure air used can be saved.

Further, when the bottles are relatively small, the amount of pressurized air used can be further reduced by using a grille 4 having blow-off holes as shown in FIG.

Next, the results of actually operating the apparatus of the present invention will be shown.

A plastic bottle of 75φ×220LrIrIn was transported for 70m using a device as shown in FIG.

The conveyor pipe was 10θφ, and the operating conditions were as follows.

When the bottles were visually inspected after shipping, few scratches were detected.

Transport capacity: 22 bottles/accumulation Air volume: 3.8 m3/min Pressure: 1500 mmAq Air velocity: 7.3 m/s Bottle transport speed: 3.5 m/s As explained above, according to the present invention, efficiency is achieved without damaging bottles. It can be easily transported.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing one embodiment of the present invention, Fig. 2 is a diagram showing another embodiment, Fig. 3 is a cross-sectional view of a part of the ejector in both embodiments, and Fig. 4 A and B are respective views of the pressure. FIG. 5 is a front view of the air blowing portion and a sectional view showing another embodiment of the grill. 1: Supply pipe, 2 taper pipe, 3: Air chamber, 4:
Grill, 5: Blade, 6: Blower, 1: Supply hopper,
8: Conveying pipe, 9: Receiving can, a: Gap.

Claims (1)

[Claims] 1. In a device for pneumatically transporting bottles in series, there is a supply pipe 1 into which the bottles are fed one by one, and an upstream side having a diameter larger than that of the supply pipe 1 and further expanding in the flow direction. The supply pipe 1 is connected to the tapered pipe 2 to which the conveying pipe 8 having approximately the same diameter as the end is connected to the expanded downstream end.
The supply pipe 1 and the tapered pipe 2 are surrounded by an air chamber 3, and the supply pipe 1 and the tapered pipe 2 are surrounded by an air chamber 3. A grill 4 is provided to guide the pressurized air supplied into the air chamber from the gap a toward the axis of the tapered tube 2, and a blade 5 is provided in front of the grill 4 inside the air chamber 3.
A suction and pressure feeding device for bottles, which is configured to generate negative pressure on the upstream side of the supply pipe 1 by pressurized air supplied to the tapered pipe 2 from the gap a. 2. The suction and pressure feeding device for bottles according to claim 1, wherein the grille 4 guides pressurized air in the axial direction of the tapered tube 2 from the crescent-shaped portion of the gap a.