JPH0420551Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a drying device for washed bottles, and more specifically, the present invention relates to a drying device for washed bottles, and more specifically, a device for blowing air through a nozzle into washed bottles that are conveyed upside down by a conveyor. The present invention relates to a drying device of this type that sequentially dries bottles by ejecting water.

[Prior Art] FIG. 4 is a diagram showing a conventional drying device of the above type. The bottle 10 is wet-cleaned in a pre-process using a device such as a pure water sprayer, and then transported to this device and subjected to a drying process.

The chain conveyor 20 that conveys the bottles 10 includes a large number of holders 22 arranged at equal intervals X,
The bottle 10 is placed on the holder 22 in an inverted state.
Further, a hollow nozzle pedestal 24 is provided below the conveyor 20 and is connected to a drying air source via a flexible tube 26 or the like, and a plurality of drying nozzles 30 are provided to protrude upward from the pedestal 24. . The interval between the nozzles 30 is equal to the interval X between the holders 22, and each nozzle 30 is provided with an air jet port 32 only at its tip.

The operation mode of the above-mentioned conventional device is as follows.

The conveyor 20 moves in the direction of the arrow F in the figure by a pitch equal to the distance X between the holders 22, and after each pitch, it stops moving for a certain period of time T before moving on to the next one. , performs intermittent operation.

Each drying nozzle 30 is retracted to a position h1 below the bottles 10 when the conveyor 20 is moving, and when the conveyor 20 is stopped, is driven upward by a distance S via a lifting device A (not shown), It is arranged to come to position h2 inside. The nozzle 30 stops at the position h2 for a short time t longer than the stop time T of the conveyor 20, and descends to the position h1 before the conveyor 20 starts moving. Also, the nozzle 30 is
0, clean warm air supplied from an air source through a filter is applied to the bottom 1 of the bottle 10 in an inverted state.
2 to dry the bottle 10.

[Problems to be solved by the invention] However, in the above conventional device, the nozzle 3
Since the manner in which air is ejected from inside the bottle 10 is always constant upward from near the center of the bottle 10, the adhering moisture inside the bottle 10 cannot be efficiently removed, resulting in uneven moisture removal. There was a problem with how easy it was.

To explain this in more detail in Figure 5,
First, the dry hot air ejected from the ejection port 32 of the nozzle 30 collides with the bottom 12 of the bottle 10 in an inverted state, and then flows down along the wall surface of the bottle 10 and is discharged from the bottle mouth 14. During this time, the large water droplets remaining in the bottle 10 flow down along the wall surface due to the action of air and the action of its own weight and collect near the bottle mouth 14, and then some of them drip outside the bottle 10, while some of the water droplets remain inside the bottle 10.
remain within. Furthermore, the minute water droplets that adhere almost uniformly to the entire surface inside the bottle 10 are vaporized by the dry temperature air and removed together with the air, but the relatively large water droplets M remaining near the bottle mouth 14 are difficult to vaporize.

Therefore, in the above conventional device, the bottle opening 1
In order to completely vaporize even the relatively large water droplets M that tend to remain near the drying nozzle 30, it is essential to carry out the drying process for a long time.
In other words, it became necessary to increase the number of dryers, that is, to provide a wider space for drying, and to increase the amount of air blown out.

The present invention has been made in consideration of the above facts, and an object of the present invention is to provide a washing bottle drying device that can perform an efficient drying process even with a relatively small drying space and a small amount of blown air.

[Means for Solving the Problems] The drying device for washed bottles according to the present invention has a plurality of points connected in series inside the washed bottles that are conveyed in an inverted state by a conveyor. A washing bottle drying device that sequentially dries the inside of the bottle by inserting a drying nozzle provided therein and blowing out air from each nozzle, the drying nozzle being provided along the conveyance direction of the bottle. The bottle is divided into at least three stages, and at least a part of the drying nozzles in the middle stage are structured to eject air downward in a concentrated manner near the bottle mouth.

[Operation] According to the present invention, the first stage of the plurality of nozzles divided into at least three stages blows air into the bottle so that the air reaches the bottom of the bottle. This dries most parts of the bottle, but
Relatively large water droplets may remain near the mouth of the bottle. Therefore, in the intermediate stage, air is jetted downward in a concentrated manner near the bottle mouth. As a result, water droplets near the mouth of the bottle are blown away and removed.

Next, the final stage nozzle blows out air again so that it reaches the entire inside of the bottle for final drying.

In this way, the direction of air ejection from the nozzle can be changed to
Since the entire inside of the bottle, near the mouth of the bottle, and the entire inside of the bottle are placed along the direction of conveyance of the bottle, the inside of the bottle can be efficiently dried, and there is no need to take up a large drying space.
There is no need to increase the amount of blowing air.

[Example] FIG. 1 is a diagram showing an example of a drying apparatus according to the present invention. The basic structure and operation of this device is the same as the conventional device described above, except for the improved parts described later. Therefore, the same parts in FIG. The explanation will be omitted.

In this device, the drying nozzles are from P1 to P.
The three drying nozzles are P1, which is the first stage, P3, which is part of the intermediate stage, and P4, which is the final stage, which are the same nozzles 30 as in the conventional device.
Nozzle 4, which has been improved according to the present invention, is used as the drying nozzle for P2, which is part of the intermediate stage.
0 is used. The nozzle 40 is shorter than the nozzle 30 and has a closed tip. Instead, the nozzle 40 has 45
Hole-shaped spout ports 42 are formed at eight locations above and below at an angle of 100 degrees. The spout 42 is configured to jet air downward in a concentrated manner near the bottle mouth 14 when the nozzle 40 is inserted into the bottle 10.

In such a structure, the nozzle 30 of P1
The jet nozzle reaches near the bottom of the bottle, which allows air to reach the entire inside of the bottle and has the role of keeping the inside of the bottle almost dry.

Further, in the nozzle 40 of P2, its spout is located near the bottle mouth and the jet direction is downward, so that it has the role of blowing off relatively large water droplets remaining at the bottle mouth.

Furthermore, the nozzles 30 at P3 and P4 have the role of once again distributing air throughout the bottle to finish drying the inside of the bottle.

That is, the drying nozzles 30 and 40 of the present invention are configured to dry the inside of the bottle through three steps: an initial drying step, a bottle neck intensive drying step, and a final drying step.

Experimental example 1 Conditions 1 pitch of movement of the conveyor 20 = 200 mm Stopping time of the conveyor 20 between moving operations = 130 seconds Lifting distance S of the nozzles 30, 40 = 180 mm Stopping time t of the nozzles 30, 40 in 1h2 of ascent = 120 seconds Temperature of drying air = 80 to 90°C 2. Drying process inside the bottle 10 As a result of drying the bottle 10 using the apparatus of the above embodiment under the above conditions, the drying process inside the bottle 10 was observed as follows.

At the P1 stage, residual water droplets on the inner surface of the bottle 10 are
Water droplets with a large diameter flow down to the vicinity of the bottle mouth 14, but minute water droplets exist all over the inside of the bottle 10.

At the P2 stage, relatively large water droplets flowing down and remaining near the bottle mouth 14 are blown away from the bottle mouth 14 and removed by air ejected from the improved nozzle 40 near the bottle mouth 14.

At the P3 stage, the minute water droplets remaining on the inner surface of the bottle 10 were almost completely vaporized and removed, and were no longer visible to the naked eye.

After the drying process in the P4th stage, in order to quantitatively understand the residual adhering moisture, we measured it using the Karl Fischer trace moisture measurement method.
) The residual adhering moisture in the air was reduced to 20 to 30 PPM (approximately the saturated value in air at a temperature of 80 to 90°C). In the conventional apparatus described above, this value is approximately equal to the point at which the sixth stage drying process is completed under similar conditions. In conventional equipment, 12
Although it takes several minutes, the device of the present invention can achieve this in 8 minutes up to the fourth stage.

In addition, in the above embodiment, the improved nozzle 40
Although the air outlet 42 is formed in the shape of a perforation, it may also be in the shape of a slit.

[Effects of the invention] As explained above, the washing bottle drying device according to the invention has a structure in which some of the nozzles at multiple locations are configured to spray air downward in a concentrated manner near the mouth of the bottle. As a result, relatively large water droplets that tend to remain near the mouth of the bottle are blown out of the bottle and removed, making it possible to perform an efficient drying process, thereby reducing the space required for drying. This also has the effect of reducing the amount of drying air used.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of the drying device according to the present invention, FIG. 2 is an enlarged view of part A in FIG. 1, and FIG.
4 is a diagram showing details of the nozzle of the same embodiment, FIG. 4 is a diagram showing a conventional drying device, and FIG. 5 is an enlarged view of portion B in FIG. 4. 10... bottle, 14... bottle mouth, 30, 40... nozzle, 32, 42... spout.

Claims (1)

[Scope of utility model registration request] Drying nozzles installed at multiple locations in series are inserted into washed bottles that are conveyed upside down on a conveyor, and air is blown out from each nozzle to dry the inside of the bottle. A drying device for washed bottles that sequentially dries the bottles, the drying nozzles provided along the conveyance direction of the bottles are divided into at least three stages, and at least a part of the drying nozzles in the middle stage are connected to the bottle mouth. A washing bottle drying device characterized by having a structure that blows air downward in a concentrated manner in the vicinity.