JP2002028586A - Method and apparatus for washing and drying pallet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such a problem that, though in a conventional washing method for supplying water to a pallet rotated by a pallet draining and rotating means for the pallet in a dehydration chamber to drain water by centrifugal force, adhered stains can be removed by centrifugal force, washing water is scattered from the surface of the pallet since the rotational speed of the pallet is too high, and then sufficient washing can not be performed and stains are scattered to adhere to an indoor wall. SOLUTION: A method and apparatus for washing and drying the pallet comprises a stage for ejecting a washing liquid by a jet nozzle 11 to wash the pallet 1 while slowly rotating the pallet 1 in a washing and drying chamber 3 and a stage for stopping the ejection of the washing liquid to rotate the pallet by a pallet rotating means 20 at a high speed to scatter the washing liquid by centrifugal force to dry the pallet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pallet cleaning / drying method and apparatus for cleaning and drying pallets and the like used for truck transportation and the like.

[0002]

2. Description of the Related Art Conventionally, most pallets used for truck transportation and the like are made of wood.
Plastic pallets have come to be used frequently for their durability. The pallets are often stored outdoors, and the pallets deposited outdoors are washed and used. Thus, the present invention relates to a pallet washing / drying method and a pallet dewatering device for drying a pallet or the like used for truck transportation or the like.

[0003] Plastic pallets tend to be considered easier to dry than wooden pallets.
The structure is such that water easily accumulates in the pallet, and if it is used carelessly just because it is superficially dry, water will come out due to the handling of the pallet and products such as cardboard on the pallet There are many fears that wetting the case and lowering the product value. In order to avoid this, conventionally, a drying means for applying hot air to a pallet for drying by using a hot air dehydrator has been used.However, due to drying efficiency, a hot air chamber accommodating a large number of pallets, a hot air furnace for heating air, There is a problem that a large facility such as a hot air fan and hot air temperature control is required, a large amount of energy is used, and a drying time of 5 minutes or more is required for each unit.

[0004] Recently, Japanese Patent Application Laid-Open No. 2000-1881
Patent Document 8 discloses a pallet washing / drying apparatus in which a dewatering chamber is provided at a pallet stop position of an intermittently moving transport conveyor, and a pallet draining rotating means for rotating a pallet in the dewatering chamber and removing water by centrifugal force is provided. A method and an apparatus have been proposed. If the rotation speed is high, the water on the pallet can be scattered and removed within a few seconds to several tens of seconds. It can be dried in a much shorter time, and the equipment needs to be provided with a dehydration chamber that only contains one pallet and rotates, so it is much smaller, and it is energy saving compared to hot air drying. In addition, there is an effect that the attached dust can be removed by centrifugal force. Further, the above-mentioned publication discloses a means for providing a washing water supply means in a dehydration chamber and performing washing and dehydration continuously in the same dehydration chamber.

[0005]

However, the rotation speed of the pallet in the pallet draining rotating means for rotating the pallet in the dehydration chamber to remove water by centrifugal force is as high as 500 rpm at high speed and 360 rpm at low speed. Because of the number, the pallet rotating speed is too high at such a high speed that the pallet rotating by the pallet draining device can be washed with washing water by a centrifugal force. Therefore, there is a problem that the washing water is scattered from the pallet surface, so that sufficient washing cannot be performed, and that dust and dirt are scattered and adhere to the indoor wall.

[0006]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a cleaning and drying chamber, in which the pallet is washed by slowly rotating the pallet at 1 to 5 rpm to wash the pallet. The present invention provides a method and an apparatus for washing and drying a pallet, comprising a step of rotating a pallet at a high speed such as 300 to 500 rpm to scatter and remove a washing liquid by centrifugal force.

According to the present invention, in the step of spraying the cleaning liquid to clean the pallet, the pallet is rotated very slowly, such as 1 to 5 rotations per minute, so that the cleaning liquid to be sprayed is sufficiently applied to the pallet surface. The dirt can be washed down to the bottom of the room by abutting evenly at the density, and after washing, the jetting of the washing liquid is stopped, the pallet is rotated at a high speed of 300 to 500 rpm, and the washing liquid is scattered by centrifugal force to remove the liquid. At this stage, dirt is removed from the pallet and only the attached cleaning liquid is scattered, so the water on the pallet is scattered and removed within a few seconds to ten and several seconds, and then the pallet is transferred within one minute. The inside can be sufficiently dried naturally, and the washing and drying can be performed in a much shorter time than before.

The present invention also provides a method and an apparatus for cleaning and drying a pallet, wherein the method and apparatus for cleaning and drying a pallet are provided with a step of injecting a drying gas after stopping the injection of the cleaning liquid. is there. According to the present invention, by injecting the drying gas after stopping the injection of the cleaning liquid, the water film adhered to the pallet surface by surface tension can be dried quickly. Further, the present invention provides a pallet cleaning / drying method and apparatus in the above-mentioned pallet cleaning / drying method and apparatus, wherein the jetting of the cleaning liquid and the drying gas are switched and performed by the same nozzle. . According to the present invention, since the injection of the cleaning liquid and the injection of the drying gas are performed by the same nozzle, not only the apparatus can be simplified, but also the dripping is prevented by the injection of the drying gas after the injection of the cleaning liquid. can do. When rinsing is performed after cleaning, the rinsing liquid can be sprayed with the same nozzle. In this case, rinsing should be performed after draining the cleaning liquid, and the rinsing liquid should be drained from another valve different from the drain valve to the rinsing tank, and mixing of the rinsing liquid and the cleaning liquid should be avoided as much as possible. preferable.

Further, according to the present invention, in the above pallet cleaning and drying method and apparatus, the pallet is transported into the cleaning and drying chamber by a transport conveyor, and the pallet is rotatably lifted from the transport conveyor by a rotatable pallet support table. It is an object of the present invention to provide a pallet cleaning / drying method and an apparatus for performing rinsing and drying. According to the present invention, since the pallet is lifted from the transport conveyor and rotated, the pallet rotating means can be configured to rotate by a unique rotating structure at a position deviated above the transport conveyor, and the transport conveyor and the pallet rotating means Can be washed and dehydrated by rotating the pallet without having a special structure associated with the intersection of the two.

The present invention also provides a method and an apparatus for cleaning and drying a pallet as described above, wherein the pallet support is formed of a tire-shaped or tube-shaped circular tube member, and the pallet is cleaned and dried as a rotary balancer to absorb vibrations. Methods and apparatus are provided. ADVANTAGE OF THE INVENTION According to this invention, the pallet support base which supports a pallet rotatably can adhere stably to a pallet, absorb a vibration, and can rotate stably and integrally.

The present invention also provides a method and an apparatus for cleaning and drying a pallet as described above, wherein the pallet is rotated by pressing a pallet against a pallet rotating means provided above the cleaning and drying chamber by a pallet support table, and the pallet is washed and dried. The present invention provides a method and an apparatus for washing and drying a pallet as described above. According to the present invention, washing and drying can be performed by rotating the pallet in a stable state by pressing the pallet against the pallet rotating means provided above the washing and drying chamber by the pallet support base.

The present invention also provides a method and an apparatus for cleaning and drying a pallet in which the cleaning liquid or the drying gas is jetted from the center of rotation of the pallet rotating means. It is.
In this case, the pallet rotating means also includes a pallet support, and it is a matter of course that the cleaning liquid or the drying gas may be jetted from the rotation center position of the pallet support. According to the present invention, the rotation center position of the pallet rotating means in which the flow of the cleaning liquid or the drying gas is poor can be cleaned or dried with the cleaning liquid or the drying gas to be sprayed.

The present invention also provides a method and an apparatus for washing and drying a pallet, wherein a gas for drying is injected during centrifugal spin-drying in the method and apparatus for washing and drying a pallet. In this case, the centrifugal spinning dehydration includes a deceleration rotation from a high-speed rotation to a stop. According to the present invention, the pallet can be dried more quickly and more reliably by injecting the drying gas during the centrifugal spin-drying.

Further, according to the present invention, in the above pallet washing / drying method and apparatus, a pallet which is heated by a back electromotive force generated in the pallet rotating means when the pallet rotating means is stopped before centrifugal spin-drying is completed to warm the washing liquid. An object of the present invention is to provide a washing and drying method and an apparatus therefor. According to the present invention, the cleaning liquid supplied into the washing and drying chamber is heated by the back electromotive force generated in the pallet rotating means at the time of the rotation braking of the pallet before the completion of the centrifugal spinning dehydration, at the bottom of the washing and drying chamber or in the tank outside the heater. Can be heated to increase the cleaning power of the cleaning liquid.

The present invention also provides a method and an apparatus for cleaning and drying a pallet as described above, wherein a cleaning liquid drop prevention plate is provided above the pallet rotating means in the cleaning and drying chamber, and the cleaning liquid scattered above the pallet rotating means is washed with the cleaning liquid. An object of the present invention is to provide a pallet cleaning / drying method and an apparatus for preventing a cleaning liquid from dropping onto a pallet surface which has been received by a prevention plate and dried after cleaning. Further, the present invention relates to claim 10
The pallet cleaning / drying apparatus according to any one of Items 1 to 17, which provides a pallet cleaning / drying method and a pallet cleaning / drying method in which a water droplet capturing material is provided in a cleaning / drying chamber, in which minute water droplets floating in the room during cleaning or drying adhere. As a result, it is possible to prevent sedimentation and adhesion to the dried pallet.

In general, a "pallet" is a thin, square or rectangular box-and-plate-shaped body in which trucks or the like are mainly used for stacking and placing fixed-sized luggage so that they can be easily handled by a lift truck. Therefore, in the configuration of the present invention, the “pallet” includes not only the above-mentioned general pallet, but also one having a shape similar to the pallet, as long as it can be rotated and drained,
The “pallet washing / drying method” or “pallet washing / drying device” according to the present invention is not limited to the general pallets described above, and is suitable for draining and drying using a rotating and centrifugal force. The washing and drying method or washing and drying apparatus for articles is included in the technical scope.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the illustrated embodiments. Reference numeral 10 denotes a pallet cleaning / drying device according to the present invention. In the case of the embodiment, the pallet 1 is intermittently moved by the transport conveyor 2 and stopped at a position where the pallet 1 stops.
Pallet rotating means 20 so that the pallet 1 is slowly rotated in the washing and drying chamber 3 for washing, and then rotated at a high speed to perform dehydration and drying by centrifugal force.
Is provided. The rotation speed at which the pallet is slowly rotated at the time of washing is very slow at about 10 rpm or less, preferably about 1 to 5 rpm. The high-speed rotation speed at the time of drying is a high speed of 100 rpm or more, and preferably about 300 to 600 rpm.

In the case of the illustrated embodiment, the pallet rotating means 20 comprises a rotary drive shaft 21 rotatably supported by a bearing 5 at the center of the ceiling 4 of the washing and drying chamber 3 and a rotary drive shaft 2.
A pallet gripping member 23 integrally fixed to a flange-like mounting portion 22 provided at a lower end of the pallet 1, a drive pulley 24 provided at an upper end of a rotary drive shaft 21, and a pallet 1.
A pallet support 25 and the like which are lifted upward from the upper broken line position and held by the pallet holding member 23 at the position shown by the solid line and rotate integrally.

As shown in FIG. 2, in the case of the embodiment, the pallet gripping member 23 has a pipe-like upper frame 26 extending integrally from the flange-like mounting portion 22 and a tip end of the upper frame 26. A corner frame portion 27 that fits and grips a corner of the pallet 1 and a lower space protruding below the upper frame portion 26 and elastically presses against the upper surface of the pallet to form a sufficient gap between the upper surface of the pallet and the upper frame portion 26. It consists of a spacer frame part 28 to be made and a reinforcing frame part 29 for connecting and reinforcing the radial upper frame part 26. The pallet holding member 23 is attached to the pallet support 25 from below.
It is only necessary to have a function of holding the pallet lifted by the upper and lower surfaces. Therefore, a configuration that abuts on the side of the pallet, such as the corner frame 27, may be provided as necessary, and the spacer frame 28, the reinforcing frame The same applies to the unit 29.

A drive pulley 24 provided at the upper end of the rotary drive shaft 21 has a timing belt between a pulley 31 provided on the motor shaft of a drive motor 30 installed on the ceiling 4 of the washing and drying chamber 3. A drive belt 32 is wound around the power supply 33 with a rotation speed control device.
The pallet 1 can be rotated at a low speed at the time of washing and at a high speed at the time of drying by the drive motor 30 supplied with the pallet. The pallet support 25 is provided rotatably via a bearing 37 at the tip of an operating shaft 36 of a fluid cylinder 35 such as an air cylinder provided at the bottom 6 of the washing and drying chamber 3. In the case of the embodiment shown in FIG. 1, the pallet support 25 is made of the same water-repellent pipe as the pallet gripping member 23 so that cleaning and drying can be easily performed.

As shown in FIG. 1 or FIG. 3, a hollow portion 47 is provided at the center of the operating shaft 36, and a supply pipe 48 having one end connected to the cleaning liquid supply pipe 13 is integrated with the operating shaft 36. To the washing liquid supply pipe 1
The cleaning liquid, dry air and the like supplied from 3 are configured to be able to be sprayed from the spray nozzle 49 at the tip of the operating shaft 36 through the hollow portion 47 to the center of the pallet on the bottom side. As shown in FIG. 3, the pallet support 25 is formed integrally with a tubular member 40 made of rubber, plastic, or the like having a large frictional resistance in the form of a tire or a tube, and placed above the pallet. 1 can be configured to be supported. The circular tubular member 40 functions as a rotary balancer. In the embodiment of FIG. 3, a balance fluid 41 such as water, salt solution, or powder fluid is sealed inside the cavity 40 without leaving an empty space, and the centrifugal force is applied. In this case, the shape is changed in the tubular member 40 in accordance with the shape and the balance is obtained.

In the drawing, reference numeral 45 denotes a circular tubular member 40.
To a working shaft 36 such as an air cylinder via a bearing 37.
The bead 43 of the tubular member 40 is kept air-tight and liquid-tight by a rim flange 44 on the outer periphery thereof. In addition,
The pallet support 25 is provided integrally with the rim flange 44. In addition, liquids and gases can be taken in and out of the tubular member 70 in the same structure as an air valve of a tire of an automobile.

Although not shown in the figure, the pallet support 25 is used to transfer the pallet 1 conveyed by a conveyer comprising two parallel chains or belt conveyors operating in synchronization with each other. As described above, the pallet 1 is lifted up and down through the belt conveyor, and pressed and held by the pallet holding member 23 at the ascending position. It will be placed on top. Further, an air cylinder 7 is provided on a side surface of the washing / drying chamber 3 so as to face an entrance of the pallet 1 along the conveyor 1.
And an opening / closing shutter 9 that opens and closes with an operating shaft 8 are provided.

Next, in the washing / drying chamber 3, there are provided a large number of ejection nozzles 11 for ejecting a washing liquid for washing the pallet 1 held by the pallet rotating means 20 to the front and back sides of the pallet 1, and the pallet rotating slowly. 1 is designed to be able to be washed evenly. The cleaning liquid that has flowed down after cleaning is temporarily stored in the bottom 6 and collected in an external tank 12 and purified by a filter or the like.
1 is supplied. Further, in the case of the embodiment, a gas supply pipe 14 for drying is connected to the cleaning liquid supply pipe 13, and the cleaning liquid switching is performed by switching valves 15 and 16 including both stops which are separately illustrated in FIG. The valve 15 is opened to supply the cleaning liquid to the jet nozzle 11 to perform cleaning. After the cleaning liquid switching valve 15 is closed, the gas switching valve 16 is opened to supply the jet nozzle 11 with the gas pressurized by the pump. The cleaning liquid is preferably water, and the drying gas is preferably low-humidity air, for example, having a humidity of 30% or less.

In the case of the embodiment, the pallet holding member 2
3 is provided in a hollow shape, and a cleaning liquid supply pipe 13 is provided through the inside of the hollow. A center injection nozzle is provided at the lower end of the cleaning liquid supply pipe 13 relative to the rotation center of the pallet 1. 17, a cleaning liquid and a drying gas can be spouted radially from the center of the pallet surface, and the cleaning water can be easily jetted to a location near the rotation center axis where cleaning is difficult, and Air is blown to the center of the pallet where centrifugal force is unlikely to be applied during drying so that drying can be promoted.

Below the top plate 4 of the washing / drying chamber 3 and above the pallet gripping member, the water droplets scattered on the panel surface are prevented from dropping onto the panel surface after washing, especially after the drying rotation. Cleaning droplet drop prevention plate 18 in an area covering
Is provided. In the case of the embodiment, the cleaning liquid drop prevention plate 18 is made of a water-soluble umbrella-shaped member provided fixedly around the rotation drive shaft 21, and the cleaning liquid collected at the center along the inclined surface rotates. The liquid droplets fall into a liquid storage frame 19 provided integrally around the drive shaft 21, and the liquid droplets stored in the liquid storage frame 19 are scattered by the rotation of the rotary drive shaft 21. In addition, it is also possible to constitute so that the washing droplet lowering prevention plate 18 may rotate integrally about the rotation drive shaft 21. In this case, by providing the washing droplet lowering prevention plate 18 in a nearly horizontal umbrella shape, Water drops can be dropped around the pallet.

During washing or spin-drying, the high-speed rotation of the pallet causes the scattered fine droplets to float in the air inside the spin-drying chamber 3 during the spin-drying operation and to be conveyed to the outside after the spin-drying step. As shown in FIGS. 4 to 7, water droplets on the air flow generated at the time of high-speed rotation are deposited near the inner wall surface of the washing / drying chamber 3 as shown in FIGS. Water droplet capturing materials 50 to 53 to be captured
Is installed in the area where the air flow meets, catching water droplets,
It is configured to enhance the drying efficiency of the stacked cases. The water droplet capturing material 50 in FIG. 4 is made of a ciliary body such as feathers, the water droplet capturing material 51 in FIG. 5 is made of a fibrous member that is fluff, and the water droplet capturing material 52 in FIG. The water droplet catching material 53 of the embodiment of FIG. 7 is made of a fine mesh wire member, and is not limited to a single layer, but may be provided in a double, triple, or multiple layers.

Further, according to the present invention, the back electromotive force generated in the drive motor 30 as the pallet rotating means at the time of the rotational braking of the pallet before the completion of the centrifugal spinning dehydration is controlled by the back electromotive force output line 38.
Electric power is supplied to a heater 39 provided in the bottom 6 of the washing / drying chamber 3 or in the tank 12 so that the washing liquid stored therein is supplied to the heater 39.
It is configured to heat to about 70 ° C. to 70 ° C. to increase the cleaning power of the cleaning liquid. In the case of the embodiment, a changeover switch 46 is provided between the power supply line 34 of the drive motor 30 and the back electromotive force output line 38, and immediately after the centrifugal dehydration high-speed rotation is completed, the power supply to the power supply line 34 is cut off. While the heater 39 is heated by energizing the back electromotive force output line 38, when the next pallet 1 is rotated, the power supply line 34 is energized and the back electromotive force output line 38 can be cut off at the same time. It is composed.

In the configuration of the above embodiment, the pallet 1 conveyed into the washing and drying chamber 3 by the conveyor 2 can be lifted by the pallet support 25 and pressed against the pallet gripping member 23 to be gripped. At this time, when the operating shaft 36 of the pallet support 25 receives a pressing force by the air cylinder 35, it is possible to expect spring elasticity due to air pressure. The fluid cylinder 35
It is also possible to more reliably support the pallet 1 by applying a push-up elasticity such as a coil spring to the piston.

The opening / closing shutter 9 of the washing / drying chamber 3 is closed, and the drive motor 30 drives the rotary drive shaft 21 for 1 to 2r.
pm, the cleaning liquid switching valve 15 is opened, and the cleaning liquid is supplied from the tank 12 to the jet nozzles 11 and 17 from the cleaning liquid supply pipe 13 and the pallet 1
Means that the front and back sides are evenly washed. The cleaning liquid is collected from the bottom 6 into the tank 12, purified by a filter or the like, and sent again from the cleaning liquid supply pipe 13 by a pump (not shown) to be used for cleaning.

When the cleaning is completed, the cleaning liquid switching valve 15 is closed, and the supply of the cleaning liquid is completed. At the same time, the gas switching valve 16 of the gas supply pipe 14 is opened, and the gas tank pressurized by a pressurizing pump (not shown) is opened. , The drying gas is supplied through the gas supply pipe 14 and the cleaning liquid supply pipe 13, and the drying gas is ejected from the ejection nozzles 11 and 17 to prevent the cleaning liquid from dripping from the ejection nozzles 11 and 17 during drying. The drying of the liquid film from the pallet surface can be assisted and promoted by continuing the spraying of the drying gas.

Here, the power required for high-speed rotation is controlled from the power supply 33 and supplied to the drive motor 30, the pallet 1 rotates at high speed via the rotary drive shaft 21 and the pallet gripping member 23, and the cleaning liquid on the pallet surface is Splash and dry. After high-speed rotation for a predetermined time of about 5 seconds to 30 seconds, power supply from the power supply 33 is cut off by the changeover switch 46,
Although not shown in the drawing, the rotation drive shaft 21 is braked by a brake device such as a disk brake provided on the rotation drive shaft 21, and the pallet 1 stops rotating.

At this time, the back electromotive force generated in the drive motor 30 due to the sudden stop is supplied to the heater 39 such as the tank 12 through the electromotive force output line 38 connected by the changeover switch 46 so as to increase the cleaning power. The cleaning solution is warmed. When the pallet stops rotating, the pallet support 25 descends while supporting the pallet 1 and is placed on the transport conveyor 2, the opening / closing shutter 9 opens, and the pallet after washing and drying is transported. Are located on the pallet support 25, and the washing and drying operations are sequentially repeated in the washing and drying chamber 3.

[0034]

As described above, according to the method and apparatus for cleaning and drying a pallet according to the present invention, in a cleaning and drying chamber,
Cleaning the pallet by spraying the cleaning liquid while slowly rotating the pallet at 1 to 2 rpm, and spraying the cleaning liquid by centrifugal force by stopping the injection of the cleaning liquid and rotating the pallet at a high speed of 300 to 500 rpm. In the step of cleaning the pallet by injecting the cleaning liquid, the pallet is rotated very slowly so that the sprayed cleaning liquid is applied to the pallet surface at a sufficient density with a sufficient density. The cleaning liquid can be washed off to the bottom of the room by contacting the cleaning liquid.After cleaning, the cleaning liquid is stopped, the pallet is rotated at high speed, the cleaning liquid is scattered by centrifugal force, and the liquid is removed from the pallet. The pallet will be scattered within a few seconds to several tens of seconds, and then the pallet will be transferred within one minute. Can be sufficiently dried naturally within, there is an effect that can be cleaned and dried in a short time much than before.

Further, the present invention provides a method and an apparatus for cleaning and drying a pallet as described above, wherein the step of injecting a drying gas after stopping the injection of the cleaning liquid is provided so that the injection of the cleaning liquid is stopped. There is an effect that the water film on the pallet surface can be quickly dried later. Further, the present invention provides a method and an apparatus for cleaning and drying a pallet as described above, wherein the injection of the cleaning liquid and the injection of the drying gas are switched and performed by the same nozzle, so that the injection of the cleaning liquid and the drying gas are performed. Is performed using the same nozzle, not only has the effect of simplifying the apparatus, but also has the effect of preventing dripping by spraying the drying gas after spraying the cleaning liquid.

Further, according to the present invention, in the above pallet cleaning and drying method and apparatus, the pallets are conveyed into a cleaning and drying chamber by a transfer conveyor, and the pallets are lifted from the transfer conveyor by a rotatable pallet support table to perform cleaning and drying. , The pallet rotating means can be rotated with its own rotating structure at a position deviated above the conveyor, and the conveying conveyor and the pallet rotating means are involved in the intersection of the two. There is an effect that the pallet can be rotated and washed and dewatered without using a special structure. Further, the present invention provides the pallet cleaning / drying method and the above-described apparatus, wherein the pallet support base is formed of a tire-shaped or tube-shaped circular pipe member so that the pallet support base is integrally adhered to the pallet. In addition, there is an effect that vibration can be absorbed and stable rotation can be achieved.

According to the present invention, in the above pallet washing and drying method and apparatus, the pallet is rotated by pressing the pallet against a pallet rotating means provided above the washing and drying chamber by the pallet support table, and washing and drying are performed. By having such a configuration, there is an effect that the pallet can be rotated in a stable state, and washing and drying can be performed. The present invention also provides a method and an apparatus for cleaning and drying a pallet as described above, wherein the cleaning liquid or the drying gas is jetted from the rotation center position of the pallet rotating means, so that the flow of the cleaning liquid or the drying gas flows. There is an effect that the rotation center position of the bad pallet rotation means can be cleaned or dried by the cleaning liquid or the drying gas to be sprayed.

Further, the present invention provides a method and an apparatus for washing and drying a pallet as described above, wherein the drying gas is injected during the centrifugal spinning dehydration, whereby the drying gas is jetted during the centrifugal spinning dehydration. As a result, the pallet can be dried more quickly and surely. Further, the present invention provides the pallet cleaning / drying method and the apparatus thereof, wherein the pallet rotating means has a configuration in which a heater is heated by a back electromotive force generated in the pallet rotating means at the time of rotational braking of the pallet before completion of centrifugal spinning dehydration to warm the cleaning liquid. Accordingly, the cleaning liquid supplied into the cleaning / drying chamber has an effect of increasing the cleaning power of the cleaning liquid by heating the heater at the bottom of the cleaning / drying chamber or in the outdoor tank.

Further, according to the present invention, in the above-mentioned pallet cleaning / drying method and apparatus, a cleaning liquid drop prevention plate is provided above the pallet rotating means in the cleaning / drying chamber, and the cleaning liquid scattered above the pallet rotating means is washed with the cleaning liquid. There is an effect that it can be prevented from being dropped on the surface of the pallet which is received by the prevention plate and dried after washing. Further, the present invention provides a method and an apparatus for washing and drying a pallet as described above, wherein a water-drop catching material is provided in the washing and drying chamber to attach minute water droplets floating in the room during washing or drying, and settle on the dried pallet. There is an effect that adhesion can be prevented.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view of a main part of an embodiment of the present invention.

FIG. 2 is a schematic perspective view of a main part of one embodiment of the present invention.

FIG. 3 is a schematic sectional view of a main part of one embodiment of the present invention.

FIG. 4 is a schematic sectional explanatory view of a main part of one embodiment of the present invention.

FIG. 5 is a schematic sectional explanatory view of a main part of one embodiment of the present invention.

FIG. 6 is a schematic sectional explanatory view of a main part of one embodiment of the present invention.

FIG. 7 is a schematic sectional explanatory view of a main part of one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pallet 2 Conveyor 3 Cleaning / drying chamber 4 Ceiling 5 Bearing 6 Bottom 7 Air cylinder 8 Operating shaft 9 Opening / closing shutter 10 Pallet cleaning / drying device 20 Pallet rotating means 11 Jet nozzle 12 Tank 13 Cleaning liquid supply pipe 14 Gas supply pipe 15 Cleaning liquid switching Valve 16 Gas switching valve 17 Center injection nozzle 18 Washing liquid drop prevention plate 19 Liquid storage frame 21 Rotary drive shaft 22 Flange mounting part 23 Pallet gripping member 24 Drive pulley 25 Pallet support 26 Upper frame 27 Corner frame 28 Spacer frame Part 29 Reinforcement frame part 30 Drive motor 31 Pulley 32 Drive belt 33 Power supply 34 Power supply line 35 Fluid cylinder 36 Working shaft 37 Bearing 38 Electromotive force output line 39 Heater 40 Circular tubular member 41 Balanced fluid 42 Vacancy 43 Bead 44 Rimf Nji 45 rim member 46 changeover switch 47 hollow section 48 supply pipe 49 injection nozzles 50, 51, 52, 53 water droplets capturing material 54 pump

Claims (18)

[Claims] 1. A step of spraying a cleaning liquid while slowly rotating a pallet in a cleaning and drying chamber to wash the pallet, and a step of stopping the injection of the cleaning liquid and rotating the pallet at a high speed to scatter the cleaning liquid by centrifugal force to remove the liquid. A pallet washing and drying method. 2. The pallet cleaning / drying method according to claim 1, further comprising a step of injecting air after stopping the injection of the cleaning liquid. 3. The pallet cleaning / drying method according to claim 1, wherein the jetting of the cleaning liquid and the jetting of the drying gas are performed by using the same nozzle. 4. The pallet cleaning / drying method according to claim 1, wherein the pallet is transported into the cleaning / drying chamber by a transport conveyor, and the pallet is rotatably lifted from the transport conveyor by a rotatable pallet support table. Pallet washing and drying method that performs washing and drying. 5. The pallet cleaning / drying method according to claim 4, wherein the pallet support base is formed of a tire-shaped or tube-shaped circular tube member, and the pallet-supporting drum is used as a rotary balancer to absorb vibration. 6. The pallet cleaning / drying method according to claim 4, wherein the pallet is rotated by pressing the pallet against a pallet rotating means provided above the cleaning / drying chamber by the pallet support table, and the pallet is rotated to perform cleaning and drying. Pallet washing and drying method. 7. The pallet cleaning / drying method according to claim 6, wherein a cleaning liquid or a drying gas is jetted from a rotation center position of the pallet rotating means and / or the pallet support. 8. The pallet washing / drying method according to claim 1, wherein a gas for drying is injected during centrifugal spin-drying. 9. The pallet washing / drying method according to claim 1, wherein a heater is heated by a back electromotive force generated during rotation braking of the pallet before centrifugal spin-drying is completed to warm the washing liquid. 10. A pallet is held in a washing and drying chamber, and washing is performed while rotating the pallet slowly with the jetting of the washing liquid. At the same time, the jetting of the washing liquid is stopped, and the pallet is rotated at a high speed to scatter the washing liquid by centrifugal force. Pallet washing / drying device provided with pallet rotating means for removing liquid. 11. The pallet cleaning / drying apparatus according to claim 10, further comprising drying gas injection means for jetting a drying gas after stopping the injection of the cleaning liquid. 12. The pallet cleaning / drying apparatus according to claim 11, further comprising the same injection nozzle for switching between injection of a cleaning liquid and injection of a drying gas. 13. The pallet washing / drying apparatus according to claim 10, wherein a pallet rotating means is provided above the washing / drying chamber, and a pallet support is provided for rotatably lifting the pallet from a pallet conveyor. A pallet washing / drying apparatus which performs washing and drying by pressing a pallet against a pallet rotating means by a pallet support table and rotating the pallet. 14. The pallet cleaning / drying apparatus according to claim 13, wherein the pallet support base is formed of a tire-shaped or tube-shaped circular pipe member, and serves as a rotary balancer to absorb vibration. 15. The pallet cleaning / drying apparatus according to claim 10, wherein a hollow rotating shaft is provided in the pallet rotating means, and a cleaning liquid or a drying gas is sprayed at a rotation center position of the rotating shaft. A pallet washing / drying apparatus provided with a nozzle and provided through a supply pipe in a hollow portion of a rotating shaft. 16. The pallet cleaning / drying apparatus according to claim 10, further comprising a back electromotive force output means for outputting a back electromotive force at the time of rotation braking at the end of centrifugal rotation to a drive motor of the pallet rotating means, and a cleaning liquid. A pallet washing / drying apparatus comprising a heater for generating heat by receiving the back electromotive force in the supply tank. 17. The pallet cleaning / drying apparatus according to claim 10, wherein a cleaning liquid drop prevention plate is provided above the pallet rotating means in the cleaning / drying chamber. 18. The pallet cleaning / drying apparatus according to claim 10, wherein a water droplet capturing material is provided in the cleaning / drying chamber.