JPS61202076A - Drier - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a drying apparatus that can be suitably used for continuous drying of film-like materials, such as photographic materials after development.

[Foreground of technology]

Generally, exposed photographic materials, such as photographic film and photographic paper, are sequentially passed through processing tanks for development, fixing, stabilization, washing, etc., which are arranged in parallel in an automatic developing device. The printed material is then developed and then subjected to drying, cutting and other processes to become a product print.

Incidentally, from the viewpoint of speeding up printing processing and reducing energy consumption, it is required to efficiently dry photographic materials after development in a short period of time. However, it cannot be said that conventional devices of this type fully satisfy these requirements, and improvements are desired, particularly in terms of thermal efficiency.

[Problem that the invention seeks to solve]

Based on the above requirements, the present invention aims to improve the thermal efficiency and the temperature rise rate of the air after the start of heating.The purpose of the present invention is to uniformly heat a film material in a short time with high thermal efficiency. The object of the present invention is to provide a drying device that can speed up the drying process and reduce energy consumption.

[Means and actions for solving the problems] The above problems are caused by (a) a case in which a paper passage is formed inside the case, (b) a heater mechanism provided in the case, and (c) a case that passes through the heater mechanism. and (d) an exhaust port provided at a position below the air path.

In the drying device with the above configuration, the heated air is heated while passing through the paper, and this heated air is blown onto the material to be dried on the paper path to heat it, and then subjected to heat treatment to reduce the temperature and temperature. The air flows downward and is discharged from the case through the exhaust port.

〔Example〕

Hereinafter, a case where an embodiment of the present invention is applied to an automatic developing device will be described with reference to the drawings.

1 to 3 are an explanatory front view showing essential parts of this embodiment, an explanatory side view with the side plate removed, and an explanatory plan view with the top plate removed.

In case 1, a photographic material (hereinafter simply referred to as "paper") that has been developed through processing steps such as development, bleaching, and rinsing in an automatic developing device (not shown) is stored in a second
As clearly shown in the figure, after passing through the paper inlet 11 provided at the upper part of the front side plate of the case 1 and passing through the inlet-side paper passage P1 leading to the lower part of the case 1, it makes a U-turn upward;
Thereafter, the paper passes through an exit side paper passage P2 leading from the lower part of the case 1 to the paper outlet 12 provided at the rear of the upper plate, and is discharged to the outside of the case 1.

An air supply port 13 is formed on the right side plate of the case 1.
A fan (sirocco fan) 2 for supplying air into the case 1 is provided outside the air supply port 13. 21 is an outer wall surrounding the outside of the fan 2, and 22 is an air intake port for taking in outside air. Reference numeral 3 denotes a guide plate that regulates the flow path of air supplied into the case 1. This guide plate 3 is provided along the paper passage P2 on the outlet side, and is located on the tip side (the left side in FIG. 3). ) is bent in an arc shape toward the paper passage P1 on the inlet side. Therefore, the air supplied into the case 1 from the air supply port 13 flows almost horizontally along the guide plate 3, as its path is schematically shown by the arrow in FIG.

The paper flows in one direction and is introduced into the center of the case 1, and then changes direction and flows toward the inlet paper passage P1.

/r --21 out 2 rods? ? A heater mechanism 4 is provided at the top, bottom, lψ2, and the second and second heaters 4A and 4A are arranged in parallel along the air path. It is composed of a heater 4B.

The first heater 4A and the second heater 4B are configured by providing a plurality of heat dissipation fins 42a, 42b on vertically extending rond heater portions 41a, 41b, respectively. These heat dissipation fins 42a, 42b are the fourth
As clearly shown in the figure, it is inclined so as to intersect with the direction of the air path (indicated by the chain arrow in the figure), and the heat dissipation fin 42a and the heat dissipation fin 4
2b is a state where both are oriented in opposite directions with respect to the air path, in other words, they are arranged symmetrically with respect to a straight line in the axial direction of the heater parts 41a and 41b. There is.

Further, on the inner wall of the front side plate of the case 1, a plurality of jammer plates 5 are provided that extend toward the paper passage P1 on the inlet side. These jammer plates 5 are configured to be inclined upwardly or downwardly with respect to the horizontal direction, and in the illustrated example, those inclined downwardly and upwardly by about 45 degrees are arranged alternately. Furthermore, an exhaust port 6 is formed in the bottom plate of the case 1 at a position below the paper path P1 on the inlet side. Conveying roller part, 8 is the paper case 1
This is a sprocket for introduction into the interior.

In the device configured as described above, when the fan 2 and heater mechanism 4 are operated, air is sucked in through the air intake port 22 and discharged into the case l through the air supply port 13, as schematically shown in FIG. Then, while flowing along the guide plate 3, the paper is heated by the heater mechanism 4 and flows toward the paper path P1 on the inlet side. In this state, the developed paper conveyed from an automatic developing device (not shown) is passed along the He-Hail paths P1 and P2. At this time, the paper passes through the paper path P1 on the entrance side.
The paper is gradually dried by the heated air blown onto it while passing through the paper path P on the exit side,
2, it is completely dried by the residual heat from the heater mechanism 4, and the finished product is removed from the outlet 12.

In this device, the heat radiation fins 42a of the first heater 4A and the second heater 4B that constitute the heater mechanism 4 are
and 42b are arranged so as to be inclined in opposite directions with respect to the air path, so that the paper on the paper path Pl can be dried evenly and with high thermal efficiency. The reason why such an effect can be obtained is considered to be due to the following reason.

The air introduced from the air supply port 13 is oriented in different directions with respect to its path through the heat dissipation fins 42a.

While passing through 42b, the flow forms a complicated meandering state. As a result, the contact time between the air and the heat radiation fins 42a, 42b per unit volume increases, and heat exchange is sufficiently performed, so that the air flow is quickly heated at a large rate of heat increase. Then, the air that has passed through the heater mechanism 4, as schematically shown in FIG.
A local thin flow of air is generated upward or downward with respect to the paper on the paper path Pl, so that the heated air is stirred above the paper. As a result, there is no directivity of the heated air to the paper on the paper path PI, and the paper is heated uniformly and efficiently.

In addition, in this device, the baffle plate 5 is provided so as to be located behind the paper passage P1 on the inlet side in the downstream of the air path, so that the heated air that has gone around behind the paper passage PI returns to the paper passage. As the heated air is circulated or stirred toward the paper on the PI, the heated air can be used efficiently. Then, the humid air whose temperature has decreased as a result of heating the paper flows downward by convection and is selectively discharged outside the case 1 through the exhaust port 6 provided on the bottom plate of the case 1, and is heated. Air circulation is facilitated.

As described above, according to the above embodiment, the air supplied into the case is quickly heated to the set temperature, and therefore the dead air required from the start of the device operation to the start of the drying process is reduced.
Not only is the time reduced, but the heated air is supplied to the paper L with uniform efficiency without wastage, and therefore the paper can be dried in a short time with high thermal efficiency.

Next, an example of a paper heating test conducted for the above-mentioned examples will be described.

In this heating test, a sample paper was fixedly placed on the paper passage Pl on the inlet side, and the apparatus was operated in this state, and the temperature changed as the drying time of the paper surface on the side to which heated air was blown was changed. was measured. As shown in FIG. 5, temperature measurements on the paper were carried out at four locations a to d on the top, bottom, left and right of the sample paper. The results are shown in FIG. 6. The songs vAa-d in FIG.
The results in d are shown.

For comparison, FIG. 7 shows a drying device having the same configuration as the above-mentioned drying device, except that only heaters whose heat dissipation fins are inclined in the same direction as the heater mechanism 4 were used. This shows the results of a heating test.

From the above results, it was found that in the examples of the present invention, each part of the paper was heated evenly and evenly within a relatively high temperature range, and the temperature of one paper was quickly increased.

On the other hand, in the comparative example, it was found that the temperature varied considerably depending on the paper, with some parts being heated to a high temperature, but other parts being heated only to a relatively low temperature.

Although one embodiment of the present invention has been described above, the present invention is not limited thereto. For example, the inclination direction or angle of the heat dissipation fins of the heaters may be changed as long as the heat dissipation fins of each heater are not all in the same direction. It can be selected as appropriate. Further, the number and arrangement of heaters, the shape and arrangement of the jammer plates, etc. can be variously modified.

Further, the drying device of the present invention may be configured separately from, for example, an automatic developing device, or may be configured to be incorporated into the automatic developing device.

〔Effect of the invention〕

According to the present invention, since the exhaust + (J) port is provided at a position below the path of heated air that reaches the paper path via the heater mechanism, the film-like material is heated and dried and becomes low and high temperature. The heated air is selectively discharged from the exhaust port by convection, and as a result, the heated air can be smoothly circulated within the case, making it possible to speed up the drying process and reduce energy consumption.

[Brief explanation of the drawing]

1 to 3 are an explanatory front view showing essential parts of an embodiment of the present invention, an explanatory side view with the side plate removed, an explanatory plan view with the top plate removed, and FIG. 5 is an explanatory diagram showing an enlarged view of the heater, FIG. 5 is an explanatory diagram showing sample paper used in the heating test, and FIGS. 6 and 7 are curve diagrams showing the results of the heating test, respectively. 1... Case 11... Paper inlet 12
...Paper outlet PL, P2...Paper passage 13...Air supply port 2...Fan 21...
- Outer wall 22... Air intake port 3... Guide plate 4... Heater mechanism 4A... First heater 4B... Second heater 41a, 41b...
- Heater part 42a, 42b... heat radiation fins 5...
・Block plate 6...Exhaust lower 1-74...
conveyor roller

Claims (1)

[Claims] 1) (a) a case in which a paper passage is formed; (b) a heater mechanism provided within the case; and (c) an air path leading to the paper passage via the heater mechanism. A drying device comprising: a fan that supplies outside air to the air; and (d) an exhaust port provided at a position below the air path. 2) The heater mechanism has a first heater and a second heater, and each of the first heater and the second heater has a plurality of heat radiation fins oriented to intersect with the air path. 2. The drying device according to claim 1, wherein the heat radiation fins of the first heater and the heat radiation fins of the second heater are oriented in opposite directions with respect to the air path.