JPH10267536A - High frequency dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To instantaneously and uniformly heat to dry all area irrespective of form of sticking portions and printing portions of an object to be dried and its conveying mode. SOLUTION: The high frequency dryer is constituted to apply high frequency voltage between a plurality of adjacent electrode pairs 8A, 8B via an oscillator 9 therebetween in a conveying direction X of a plurality of electrode 8 groups aligned at a predetermined interval by a conveyor 1 for continuously conveying an envelope making form sheet 2 along a horizontal linear route 3, and to dispose the groups obliquely to the direction X while maintaining parallel attitude with each other as it is.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to, for example, drying of mail sealing glue and drying of printing ink of various packaging materials. More specifically, the present invention applies a large number of objects to be dried along a horizontal linear path. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency drying apparatus that is used to dry and harden a glued portion or a printed portion of each object to be dried with heat generated by a dielectric loss caused by application of a high-frequency voltage while being continuously conveyed.

[0002]

2. Description of the Related Art A high-frequency drying apparatus of this type includes a plurality of electrode groups arranged in parallel at a predetermined interval in a conveying direction of an object to be dried so as to face a horizontal linear path by a conveying apparatus. By applying a high-frequency voltage between a plurality of pairs of electrodes adjacent to each other, the object to be dried is continuously dried with heat generated by the induced current. Were disposed at right angles to the transport direction of the object to be dried.

[0003]

According to the conventional high-frequency drying apparatus having the above-described structure, the plus and minus portions where the glued portion and the printed portion of the article to be dried conveyed along the horizontal straight path are adjacent to each other in the conveying direction. And the printed part is instantaneously heated and dried by the heat generated by the dielectric loss caused by the high-frequency voltage applied between the pair of electrodes. If the location or printing location is conveyed in such a manner as to straddle between adjacent electrode pairs, it is possible to reliably perform predetermined heating and drying, but for example, to seal a mail such as an envelope. Like the line glue seen in the glue, since the glued portion and the printed portion are linear and located at a right angle to the transport direction, it can be conveyed without straddling the electrode pair. What In the case of, the heat generated due to the dielectric loss may not be able to be applied to the glued portion or the printed portion, depending on the form of the glued portion or the printed portion of the material to be dried and the transport form thereof, There was a problem that instantaneous heating drying could not be performed at all, or even heating drying could not be performed over the entire area, resulting in defective drying.

[0004] The present invention has been made in view of the above-described circumstances, and regardless of the form of a glued portion or a printed portion of a material to be dried, or the form of transport thereof, it is instantaneous over the entire location. It is an object of the present invention to provide a high-frequency drying device capable of performing uniform heating and drying.

[0005]

In order to achieve the above object, a high-frequency drying apparatus according to the first aspect of the present invention comprises: a conveying device for continuously conveying an object to be dried along a horizontal linear path; A plurality of electrodes arranged in parallel at a predetermined interval in the transport direction of the object to be dried, each facing a horizontal linear path by the device, and a plurality of sets of these electrode groups which are adjacent to each other in the transport direction of the object to be dried. And a oscillating unit for applying a high-frequency voltage between the pair of electrodes and generating heat for drying by the induced current. It is characterized by being arranged to be inclined with respect to the transport direction of the dried product.

According to the high-frequency drying apparatus of the first aspect of the present invention, since a plurality of electrodes are arranged in an inclined state with respect to the conveying direction of the object to be dried, a gluing point of the object to be dried is provided. And the printing location is linear, and even if it is in the form of being positioned at right angles or substantially at right angles or parallel to the transport direction, the plus and minus of the glue point etc. adjacent to each other in the transport direction during transport. It is possible to straddle between the electrode pairs, therefore, the heat generated by the dielectric loss associated with the high-frequency voltage applied between the electrode pairs is instantaneously applied over the entire area of the glued portion and the printed portion,
Even heating and drying can be performed.

Here, as the inclined arrangement of the plurality of electrodes, the central portion in the longitudinal direction of each electrode is an apex, and both side portions thereof are arranged in the conveying direction of the object to be dried. When it is formed in a substantially V-shape in a plan view that is inclined toward the same direction, even if the glued portion or the printed portion has various forms, the glued portion of most of the dried material can be used. And the like can be straddled between the positive and negative electrode pairs during transportation, and the types (forms) of objects to be dried that can be applied to instantaneous and uniform heating and drying can be significantly expanded. That is, the use of the high-frequency drying device can be expanded.

According to a third aspect of the present invention, the same number of electrodes located in the front half and the rear half of the transport direction are arranged in the same V-shape in plan view. By adopting the inverted arrangement mode, even if the gluing point or the like is inclined in either direction with respect to the transport direction, the plus and minus of the glue point or the like of the object to be dried are arranged in parallel in the transport direction. It is possible to straddle any one of the electrode pairs, and the type (form) of the object to be dried which can be applied to instantaneous and uniform heating and drying can be further expanded.

Further, when the inclination angles of the plurality of electrodes with respect to the transport direction can be adjusted collectively, the inclination angles of the electrodes can be adjusted by changing the inclination angles of the electrodes on the glued portion or the printing object. By adjusting and using in advance in accordance with the form of the place and the like, the predetermined heating and drying can be reliably performed regardless of the form of the material to be dried at the paste place or the like.

The inclination angle of each electrode with respect to the transport direction is most preferably in the range of 30 to 45 °, and it is sufficient to set the angle adjustment range in the range of 30 to 45 °.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partially cutaway schematic perspective view showing an embodiment of a high-frequency drying apparatus according to the present invention, and FIG. 2 is a schematic plan view of a main part of FIG.
Is a conveying device that continuously conveys an envelope forming paper sheet 2 as an example of a material to be dried along a horizontal linear path 3. The conveying device 1 is fed out from a wrapping paper roll 4 and passed through a gluing roll 5. It is composed of a plurality of pairs of rollers 1A which are sandwiched from above and below and which are relatively driven and rotated, with the above-mentioned envelope forming paper sheet 2 having a predetermined portion, such as a peripheral portion of a sealing piece, glued.

Reference numeral 6 denotes an apparatus main body disposed in the middle of the horizontal straight path 3 of the envelope forming paper sheet 2 continuously conveyed along a horizontal plane by the conveying apparatus 1. It comprises a box-shaped case 6A provided and a door 6B attached to the box-shaped case 6A so as to swing and open. In a box type case 6A of the apparatus main body 6, a plurality of chrome-plated brass sheets are provided at predetermined intervals in the transport direction (the direction of the arrow X in FIG. 1) facing the horizontal straight path 3 of the paper sheet 2 respectively. When the roll-shaped electrodes 8 are kept parallel to each other,
Are arranged in parallel at an angle θ of 30 to 45 °. These roll-shaped electrodes 8 are configured to be in a non-contact type with respect to the paper sheet 2, but may be in a contact type.

[0013] Of the plurality of roll-shaped electrode groups 8, a plurality of electrodes 8A positioned alternately in the transport direction X are defined as a positive electrode and the other electrodes 8B are defined as a negative electrode. An oscillating unit 9 for applying a high-frequency voltage between the pair of electrode pairs 8A and 8B is provided in a box type case 6A of the apparatus main body 6. This oscillator 9
Is a power supply voltage of 200 to 220 V, a high frequency output of 2 to 4 kW,
It has an oscillation frequency of 40.46 MHz, and is configured to apply a high-frequency voltage to each of the electrodes 8.

In the high-frequency drying apparatus having the above-described structure, the envelope forming paper sheet 2 fed out from the wrapping paper roll 4 and pasted to a predetermined portion such as the peripheral portion of the sealing piece via the pasting roll 5 is transferred to the conveying device 1. And is continuously conveyed along the horizontal straight path 3. Then, when the envelope forming paper sheet 2 is carried into the apparatus main body 6 and its glued portion straddles between the positive and negative electrode pairs 8A and 8B adjacent to each other in the transport direction, the electrode pair 8
Heat is generated by the dielectric loss caused by the high frequency voltage applied between A and 8B, and the glued portion is instantaneously heated and dried.

Here, since the electrodes 8 (8A, 8B) are arranged in an inclined state with respect to the transport direction X, the glued portions of the paper sheet 2 are linear, and Even when the glued portion is located at a right angle or a substantially right angle, it is possible to carry the glued portion in a state of straddling between the plus and minus electrode pairs 8A and 8B adjacent to each other in the carrying direction during the carrying. And therefore
The heat generated by the dielectric loss caused by the high-frequency voltage applied between the electrode pairs 8A, 8B is instantaneously applied to the entire area of the glued portion, so that uniform heating and drying can be performed.

FIG. 3 is a schematic plan view of a main part showing another embodiment of the high-frequency drying apparatus according to the present invention. In this embodiment, a plurality of electrodes 8 are divided into a central portion 8a in the longitudinal direction. Is a vertex, and both sides 3b, 3b are formed in a substantially V-shape in plan view so that they are inclined at the above-mentioned angle θ in the same direction with respect to the transport direction X.

FIG. 4 is a schematic plan view of the V shown in FIG.
FIG. 9 shows another embodiment in which the orientation and orientation of a plurality of groups of electrodes 8 having a U-shape are improved by devising them. The group of electrodes 8 is divided into a first half and a second half in the transport direction X, each having the same number. Electrode 8
The electrode 8 at the front and the second half is arranged such that the central vertex 8a is located at the frontmost position in the transport direction X, and the rear half electrode 8 is located at the rearmost position in the transport direction X. 8 are inverted.

In the case of the embodiment shown in FIG. 3, even if the pasted portion or the printed portion of the paper sheet 2 has any form, the pasted portion of most of the dried portion is pasted. It is possible to straddle between the plus and minus electrode pairs 8A and 8B during transportation of a location, etc., and to expand the types (forms) of the material to be dried which can be applied to instantaneous and uniform heating and drying. Can be. In particular, FIG.
When the embodiment as shown in is adopted, no matter which direction the gluing point or the like is inclined with respect to the transport direction X,
Either the electrode pair 8A, 8B located in the first half or the electrode pair 8A, 8B located in the second half of the plus and minus electrode pairs arranged in parallel in the transport direction for the gluing point of the dried material. It is possible to straddle the crab, and the type (form) of the object to be dried which can be applied to instantaneous and uniform heating and drying can be further expanded.

FIG. 5 is a schematic plan view of a main part showing another embodiment of the high-frequency drying apparatus according to the present invention. In this embodiment, a plurality of electrodes 8 are conveyed to both ends in the longitudinal direction. A pair of left and right movable rods 10, 10, which are swingable in opposite directions along the direction X, are pivotally connected to each other, and a plurality of movable rods 10, 10 are swingable in opposite directions. The tilt angle of the electrodes 8 is configured to be collectively adjustable. When such a configuration is adopted, each electrode 8
The angle of inclination θ of the object to be dried is adjusted in advance in accordance with the form of the glued portion, the printed portion, etc. of the material to be dried. Can be performed.

[0020]

As described above, according to the first aspect of the present invention, the glued portion and the printed portion are linear and are positioned at right angles, substantially at right angles, or parallel to the transport direction. Even in the case of a dried product, it is possible to straddle a gluing point or the like between the positive and negative electrode pairs adjacent to each other in the transport direction during transport thereof.
The heat generated by the dielectric loss caused by the high-frequency voltage applied between the electrode pairs is instantaneously applied to the entire area of the glued portion and the printed portion, so that uniform heating and drying can be performed. This produces an effect that generation of conforming products can be avoided as much as possible.

According to the second to fourth aspects of the present invention, most or all of the objects to be dried having a glued portion, a printed portion, or the like in any form with respect to the transport direction. It is possible to extend the type (form) of the object to be dried which can be applied to instantaneous and uniform heating and drying by straddling the gluing point of the object to be dried between the positive and negative electrode pairs during transportation. it can. That is, there is an effect that the use of the high-frequency drying device can be expanded.

[Brief description of the drawings]

FIG. 1 is a partially broken schematic perspective view showing an embodiment of a high-frequency drying device according to the present invention.

FIG. 2 is a schematic plan view of a main part of FIG.

FIG. 3 is a schematic plan view of a main part showing another embodiment of the high-frequency drying device according to the present invention.

FIG. 4 is a schematic plan view of a main part showing another embodiment in which the embodiment shown in FIG. 3 is modified and improved.

FIG. 5 is a schematic plan view of a main part showing another embodiment of the high-frequency drying device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conveying device 2 Envelope preparation paper sheet (an example of a thing to be dried) 3 Horizontal straight path 8 Electrode 8A Plus electrode 8B Minus electrode 9 Oscillator

Claims (4)

[Claims] 1. A transport device for continuously transporting a material to be dried along a horizontal linear path, and a plurality of the devices are arranged in parallel with a predetermined interval in the transport direction of the material to be dried facing the horizontal linear path by the transport device. A plurality of electrodes, and an oscillating unit that applies a high-frequency voltage between a plurality of pairs of electrodes adjacent to each other in the transport direction of the material to be dried in the electrode group and generates drying heat by an induced current. In the high frequency drying apparatus provided, the plurality of electrodes are arranged so as to be inclined with respect to the transport direction of the object to be dried while maintaining a mutually parallel posture. 2. The plurality of electrodes are each formed in a substantially V-shape in plan view in which a central portion in the longitudinal direction is a vertex and both side portions are inclined in the same direction with respect to the transport direction of the material to be dried. The high frequency drying device according to claim 1, wherein the drying is performed. 3. The plurality of electrode groups formed in a substantially V-shape in plan view, wherein the same number of electrodes located in the front half and the rear half in the transport direction have opposite directions. High frequency drying equipment. 4. The high-frequency drying apparatus according to claim 1, wherein the inclination angles of the plurality of electrodes with respect to the transport direction can be adjusted collectively.