JPH1163837A - Drier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drier capable of contriving the improvement of environment in a drying room and enhancement of drying work efficiency, by containing articles in the drying room orderly, and properly grasping an end of drying of the articles from outside. SOLUTION: A drier comprises a plurality of drying rooms 13 partitioned by partition walls 12 so as to be parallelly arranged and each capable of containing articles C to be dried, a plurality of doors 17 for respectively opening and closing front faces of the rooms 13, an exhaust means 14 for exhausting air in the drying rooms 13, a plurality of detecting means for detecting whether the articles C contained in the drying rooms 13 are dried or not, and a display means installed outside of the drying rooms 13 for displaying detection results of a plurality of detecting means 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drying apparatus for drying a painted or bonded product in a drying chamber.

[0002]

2. Description of the Related Art As a conventional drying apparatus of this type, for example,
The one shown in FIG. 4 is known. This drying device 51
This is for drying case parts C such as a keyboard lid and a mouth stick of a piano after painting, and is installed separately from a spraying chamber 52 for preparing and spraying paint. This is because, since a polyester paint using an organic solvent such as styrene or acetylene as a solvent is generally used for painting the case component C of the piano, the harmful organic solvent vapor that evaporates during drying is used by the operator. This is to prevent exposure.

[0003] A drying device 51 includes a drying chamber 53 and a drying chamber 5.
And an exhaust device 54 for exhausting the air inside 3. The exhaust device 54 includes a hood 56 with an exhaust fan 55 provided near a wall in the drying chamber 53.
Communicates with the outside of the drying chamber 53 via a duct (not shown). The drying chamber 53 is connected to the spraying chamber 52 with the intermediate chamber 57 therebetween.
Between the two doors 58, 58, the intermediate chamber 57 and the spray chamber 5
One door 59 is provided between the two.

[0004] The work of painting and drying the case parts C is as follows.
For example, it is performed as follows in a state where a plurality of case parts C are mounted on the carriage 60. First, in the spraying chamber 52, the paint is prepared with a predetermined composition, and the prepared paint is put into a paint tank (neither is shown) connected to the spray coating machine to prepare for preparation. Next, the plurality of case parts C placed on the carriage 60 are transported to the spray chamber 52, and spray-painted simultaneously by a spray coating machine. After that, the same coating is sequentially performed on the case components C placed on the other carriage 60.

[0005] Next, the case components C, which have been coated, are sequentially carried in the drying chamber 53 together with the carriage 60, and are arranged.
Is closed and left in the drying chamber 53 for drying.
The vapor of the organic solvent evaporating from the case part C during drying is
The exhaust air from the exhaust fan 55 of the exhaust device 54 causes the hood 5
6 and is discharged out of the drying chamber 53 through the duct.

After drying for a predetermined time, the case component C
Are sequentially carried out from the drying chamber 53, carried into the spraying chamber 52, and painted again as described above. By repeating the above-described coating step and drying step a predetermined number of times, for example, 5 to 8 times (overcoating), coating and drying are completed. The dried case part C is carried out of the drying chamber 53 for the next step. Note that the predetermined time for the drying is set as an approximate required time until the case component C is brought into the touch-dry state (semi-dry state).
If the drying time is shorter than this, pinholes are likely to occur, which may adversely affect the quality of the coating.

[0007]

However, in the above-described conventional drying apparatus 51, a plurality of trolleys 60 on which the painted case parts C are loaded are sequentially loaded into one drying chamber 53, and
Since the drying is performed in a state in which the parts are arranged, it is difficult to know which case component C of the bogie 60 has finished drying. For this reason, a time loss occurs in searching for the carriage 60 to be carried out, and the case component C that has not been dried may be carried out by mistake. In that case, not only the above-mentioned adverse effects on the quality of the coating are exerted, but also the worker may be exposed to a harmful organic solvent evaporating from the case component C during drying. Further, when accessing the trolley 60 that has been dried for a predetermined period of time, depending on the positional relationship with the other trolleys 60, it may be necessary to pass near the case component C that is being dried. Workers are exposed to organic solvents. As a result, for example, there is a possibility that the management category “1”, which is regarded as a favorable working environment in the “Labor Ministry Ordinance Related to the Industrial Safety and Health Law”, cannot be achieved.

Further, in the drying apparatus 51, since a plurality of carts 60 are simply arranged and accommodated in one drying chamber 53, the transport loss of the carts 60 is large and the carts 6
0 is apt to be placed in a random manner, and the trolleys 60 are likely to come into contact with each other and the case component C to be dropped.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is possible to store the product in a drying room in an orderly manner, and to accurately grasp the end of the drying of the product from the outside. It is an object of the present invention to provide a drying apparatus capable of improving the working environment and improving the efficiency of the drying operation.

[0010]

In order to achieve this object, a drying apparatus according to the present invention is provided with a plurality of drying chambers arranged side by side in a state of being separated from each other by partition walls, each of which can store a product to be dried. A plurality of doors respectively for opening and closing the front surfaces of the plurality of drying chambers, an exhaust unit for discharging air in the drying chambers, and a plurality of detections each detecting whether or not the product stored in the plurality of drying chambers has dried. And a display unit provided outside the drying chamber and displaying the detection results of the plurality of detection units.

According to this drying apparatus, the product to be dried is stored in each of the plurality of drying chambers, and the product is dried while exhausting the drying chamber by the exhaust means. Also, a plurality of detecting means detects whether or not the product in each drying chamber has dried, and the detection result is displayed on a display means outside the drying chamber, so that the operator confirms the display on the display means. Thus, it is possible to accurately judge which drying room has finished drying the product from outside the drying room. This prevents accidental removal of undried product and exposes workers to harmful vapors when the dried material is a substance that emits harmful vapors during drying, such as organic solvents. Can be reliably prevented. In addition, since the drying room is partitioned by the partition wall, even when products in other drying rooms are being dried, the degree of the influence is reduced, and the working environment of the drying room can be maintained well.

Further, since the products are stored in the plurality of drying chambers separated by the partition walls, the products can be stored in the drying chambers in an orderly manner. Further, since a plurality of drying chambers are provided side by side and the drying chamber where drying is completed can be directly accessed, work efficiency can be improved by reducing transport loss.

[0013] In this case, it is preferable that the display means is provided on a front surface of each of the plurality of drying chambers, and is constituted by a plurality of indicator lights for displaying the detection results of the plurality of detection means.

In this configuration, whether or not the product in the drying chamber has finished drying is indicated by the indicator lights provided on the front of each drying chamber, so that the drying state of each drying chamber can be more easily understood. The judgment can be made more accurately.

In these cases, each of the plurality of detecting means is
It is preferable that the apparatus be configured with a timer that measures a predetermined time after the door is closed.

According to this configuration, for each drying chamber, the drying state of the product in the drying chamber is detected by counting whether or not a predetermined time has elapsed since the door was closed by the timer. In general, the progress of drying does not vary greatly if the conditions for applying a drying target such as a paint or the drying conditions such as the temperature of a drying chamber are constant. Therefore, in consideration of these conditions and the required degree of drying, the predetermined time is set in advance, and the predetermined time is measured by a timer after closing the door, so that the end of the drying of the product can be accurately detected. Can be. Further, by using the timer, the detecting means can be configured at a relatively low cost.

In this case, the plurality of drying chambers have open rear portions and are continuous with each other, and the exhaust means is constituted by a single exhaust means arranged near the rear portion and common to the plurality of drying chambers. A plurality of door sensors for respectively detecting the open / closed state of the plurality of doors, and a door lock means for locking the other door to a closed state when the door sensor detects that one of the plurality of doors is in an open state. Preferably, it is provided.

According to this structure, the exhaust of the plurality of drying chambers is performed by one common exhaust means provided near the rear of the drying chamber. When one door is opened, a door sensor detects that the door is opened, and accordingly,
Door locking means automatically locks the other door in the closed state. Accordingly, two or more doors are not opened at the same time, and a decrease in the amount of exhaust air due to the opening of the doors can be suppressed to a minimum, whereby a favorable working environment can be maintained. As described above, it is possible to efficiently exhaust the drying chamber while maintaining the working environment by using one common exhaust unit.

In this case, the exhaust means has an exhaust air volume of the first
The exhaust air amount and the second exhaust air amount larger than the first exhaust air amount are configured to be switchable, and the exhaust air amount of the exhaust unit is detected when the door sensor detects that all of the plurality of doors are in the closed state. Switching to the first exhaust air amount, the second exhaust air amount is set to a second value when the door sensor detects that one of the plurality of doors is open.
It is preferable to further include an exhaust air volume changeover switch for switching to the exhaust air volume.

In this configuration, in a state where the doors of all the drying chambers are closed, that is, in a state where the product is waiting to be carried in or a state where the product is being dried, the exhaust air amount of the exhaust means is changed by the exhaust air amount switch. Thus, the first exhaust air amount is controlled to be smaller. As a result, the required amount of exhaust air during drying can be ensured with smaller power consumption, and the wind pressure on the door is also reduced, so that the door can be easily opened when loading and unloading the product. On the other hand, when the door is opened, the other doors are locked by the door lock mechanism, and the exhaust air amount of the exhaust unit is automatically switched to the larger second exhaust air amount by the exhaust air amount switch. With this, the amount of exhaust air in the drying chamber when the worker is working is compensated for by the decrease due to the opening of the door,
By controlling the amount of exhaust air to be larger, a large exhaust capacity can be secured, and therefore, a favorable working environment can be maintained.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a plan view of a work place for painting and drying case parts such as a keyboard lid and a mouthpiece of a piano. As shown in the figure,
This work place includes a drying device 1 according to the present invention and a drying device 1.
The drying device 1 is connected via the mixing chamber 2 and the intermediate chamber 3
And a spray chamber 4 separated from the mixing chamber 2.

The preparation chamber 2 is a room for preparing a paint used for painting. As the paint in this case, a polyester paint using an organic solvent such as styrene or acetylene as a solvent is used. The mixing chamber 2 is separated from the drying apparatus 1 by a wall 5, and a hood 7 with an exhaust fan 6 is installed at the rear (lower part in the figure) of the mixing chamber 2.
A door 8 is provided on the front surface.

The spraying chamber 4 is a room for spray-coating the case parts C, and is provided with a paint tank for storing the paint prepared in the mixing chamber 2, a spray coating machine, an exhaust device, etc. (all not shown). ing. Between the spraying chamber 4 and the intermediate chamber 3,
One door 8 is provided. Note that the case component C
Work of painting, drying and moving of multiple case parts C
Is carried out on the cart 9 in a state of being carried on the cart 9.

The drying device 1 is for carrying in and drying the case component C painted in the spraying chamber 4.
It is divided into two left and right drying blocks 11 and 11. Each drying block 11 has a partition wall 12 in the first half.
Is divided into four drying chambers 1 in the horizontal direction.
3 are juxtaposed. Further, the latter half of the drying block 11 is continuous with each other, and the four drying chambers 13
Hood 15 (exhaust means) with common exhaust fan 14
Is provided. The hood 15 communicates with the outside of the drying block 11 via a duct (not shown). The amount of exhaust air from the exhaust fan 14 is determined by the exhaust air amount switch 1.
6 (see FIG. 3), it is configured to switch between a predetermined first exhaust air volume and a larger predetermined second exhaust air volume.

Each of the drying chambers 13 has a width capable of accommodating the cart 9 on which the case component C is placed, and a rail (not shown) for guiding the cart 9 is laid on the floor of the drying chamber 13. Have been. A door 17 is provided on the front surface of each drying chamber 13, and as shown in FIG. 2, a transparent glass window 18 is attached to each door 17 so that the inside of the drying chamber 13 can be checked from the outside. . Above each door 17, a display lamp 19 (indicator light) including a left green lamp 19a and a right red lamp 19b is provided.

Further, each of the drying chambers 13 is provided with a door sensor 20 for detecting the open / close state of the door 17 (see FIG. 1). , A door lock mechanism 22 (see FIG. 3),
The operation of the display lamp 19 is controlled.

FIG. 3 shows a control circuit diagram based on the detection result of such a door sensor 20. Specifically, when the door sensor 20 detects the opening of the door 17, the green lamp 19 a of the display lamp 19 is turned on, and when the closing of the door 17 is detected, the green lamp 19 a is turned off. . Further, when the door 17 is opened and then closed, the timer 21 starts counting time, the red lamp 19b blinks, and the timer 21 is operated for a predetermined time (for example, 1).
When two minutes have been counted, the red lamp 19b is turned on.
The timer 21 is for indirectly detecting the end of the drying of the case component C stored in the drying chamber 13.

When the door sensor 20 detects that one door 17 has been opened, the door lock mechanism 22 activates another door 17 of the drying block 11 to which the opened door 17 belongs.
And the exhaust air amount switch 16 is configured to switch the exhaust air amount of the exhaust fan 14 of the drying block 11 from the first exhaust air amount to a larger second exhaust air amount.

Next, a series of operations for coating and drying the case component C using the drying apparatus 1 having the above-described configuration will be described in detail. First, in the blending chamber 2, a paint is blended with a predetermined composition. In this case, since the preparation room 2 is configured as an isolated dedicated room, diffusion of the organic solvent into other rooms can be prevented. Next, the prepared paint is carried into the spraying chamber 4 and put into a paint tank connected to the spray coating machine, to prepare for coating. Next, the plurality of case parts C are loaded on the trolley 9, carried into the spraying chamber 4, and spray-painted simultaneously by a spray coating machine. Next, the case parts C placed on the other carts 9 are sequentially carried into the spraying chamber 4 and painted in the same manner.

Next, the case parts C together with the carriage 9 are carried out from the spraying chamber 4 in order from the one after the coating, and the door 17 of the empty drying chamber 13 is opened, and the case parts C are carried into the drying chamber 13.
The door 17 is closed and drying is performed. In each of the drying blocks 11, the exhaust fan 14 is operated, and the vapor of the organic solvent that evaporates from the case component C during drying is discharged from the exhaust fan 14.
Is discharged out of the drying block 11 through the hood 15 and the duct. When the door 17 is closed after being carried into the drying chamber 13, the timer 22 starts counting in response to the detection of the closing of the door 17 by the door sensor 20, and the red lamp 19 b of the display lamp 19 blinks. Then, it is displayed that the drying chamber 13 is under the drying operation.

When a predetermined time elapses after the door 17 is closed, the timer 22 stops counting time, and accordingly, the red lamp 19b changes from a blinking state to a lighting state, thereby completing the drying operation for a predetermined time. Show that.
The operator confirms this display, carries out the case component C from the drying chamber 13, carries it into the spraying chamber 4, and paints it again as described above. The coating and drying of the case component C are completed by repeating the above-described coating and drying steps a predetermined number of times, for example, 5 to 8 times (overcoating). The dried case part C is used for the next step.
It is carried out of the drying chamber 13.

As described above, the operator confirms that the red lamp 19b of the display lamp 19 is in a blinking state, so that the operator can determine which of the drying chambers 13 of the case parts C has finished drying. Accurate judgment can be made from outside. As a result, it is possible to prevent the undried case component C from being taken out by mistake and to prevent the worker from being exposed to the harmful organic solvent vapor that evaporates during drying. Further, since the drying chambers 13 are separated from each other by the partition wall 12, even if the products in the other drying chambers 13 are being dried, the influence of the influence is reduced. As a result, the working environment of the drying chamber 13 can be favorably maintained.

Further, each of the plurality of drying chambers 13 partitioned by the partition wall 12 can house the case components C in an orderly manner, and a plurality of drying chambers 13 are provided side by side. Since direct access is possible, work efficiency can be improved by reducing transport loss.

Next, the control of the amount of exhaust air accompanying the opening and closing of the door 17 in the drying apparatus 1 will be described in accordance with the above-described procedure of the drying operation. Before the case components C are carried in, the doors 17 of all the drying chambers 13 are closed, and the exhaust air volume of the exhaust fan 14 is controlled to a small first exhaust air volume by the exhaust air volume switching switch 16. For example, the “Labor Ordinance on Labor Safety and Health Law” states that, in order to maintain a working environment in which organic solvents are used, the control wind speed in the case of an enclosed hood is set to 0.
It is stipulated that it must be at least 4 m / s,
The first exhaust air amount is set so as to reliably achieve the control wind speed. In this state, the wind pressure on the door 17 is small, and the door is easily opened when the product is carried in.

In this state, when one door 17 is opened for carrying in the case component C, the other door 17 of the drying block 11 is locked by the door lock in response to the detection by the door sensor 20. Locking in the closed state by the mechanism 22 prevents simultaneous opening of the two or more doors 17 and the accompanying reduction in the amount of exhaust air. Further, with the opening of the door 17, the amount of exhaust air from the exhaust fan 14 is increased by the exhaust
It is automatically switched to the exhaust air volume. Thereby, the exhaust air volume in the drying chamber 13 when the worker is performing the work can be maintained at a larger exhaust air volume while compensating for the decrease due to the opening of the door 17, and a large exhaust capacity can be secured. Therefore, a favorable working environment can be maintained.

When the door 17 is closed after the case component C is carried in, the locked state of the other doors 17 by the door lock mechanism 22 is released, and the amount of air exhausted by the exhaust fan 14 is changed by the exhaust air amount changeover switch 16. By switching to one exhaust air amount again, the exhaust air amount becomes smaller.
As described above, by automatically switching the amount of exhaust air in accordance with the opening and closing of the door 17, the exhaust fan 14 is secured while maintaining an appropriate amount of exhaust air in accordance with the presence or absence of a worker, while saving power. Can be operated efficiently. Also,
The area to be dried is roughly divided into two drying blocks 11 and 11 and an exhaust fan 14 is provided for each.
Even the exhaust fan 14 having a small exhaust performance can sufficiently exhaust air.

As described above, according to the drying apparatus 1 of the present embodiment, the case components C can be correctly carried out only from the drying chamber 11 where drying has been completed, and the drying chambers 11 Are separated by the partition wall 12, so that the degree of exposure of the worker to the harmful organic solvent vapor that evaporates during drying can be greatly reduced. The door lock mechanism 2 associated with the opening of the door 17
2 and the switching of the exhaust air volume of the exhaust fan 14 by the exhaust air volume switching switch 16, a legally controlled wind speed can be secured. As a result, the working environment of the drying room 11 can be maintained satisfactorily, and for example, a management category “1” defined as a good working environment in “Labor Ministry Ordinance Related to the Industrial Safety and Health Law” can be achieved.

The present invention is not limited to the above embodiment, but can be implemented in various modes. For example, in the embodiment, as a detection unit that detects the end of the drying operation,
Although a timer is used, other suitable means may be used. Similarly, as a display unit for displaying the detection result of the detection unit, a display lamp provided for each drying chamber is used,
It is also possible to employ display means other than the display lamp or display means of the centralized display system. Furthermore, although the embodiment is an example of drying a painted piano case part, it goes without saying that the present invention can be applied to drying of other products such as painting and bonded products. In addition, the detailed configuration can be appropriately changed without departing from the spirit of the present invention.

[0039]

As described above in detail, the drying apparatus of the present invention can orderly store a product in a drying room, and can accurately grasp the end of drying of the product from the outside, whereby the working environment of the drying room can be obtained. This has the effect of improving drying and improving the efficiency of the drying operation.

[Brief description of the drawings]

FIG. 1 is a plan view showing a drying apparatus to which the present invention is applied, together with incidental facilities.

FIG. 2 is a front view of one drying block of the drying device of FIG. 1;

FIG. 3 is a control circuit diagram of the drying device of FIG. 1;

FIG. 4 is a plan view showing a conventional drying device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drying device 12 Partition wall 13 Drying room 14 Exhaust fan 15 Hood 16 Exhaust air volume change-over switch 17 Door 19 Indicator lamp 20 Door sensor 21 Timer 22 Door lock mechanism C Case parts

Claims (5)

[Claims] 1. A plurality of drying chambers which are arranged side by side in a state of being separated from each other by a partition wall and are capable of accommodating products to be dried, a plurality of doors respectively opening and closing front surfaces of the plurality of drying chambers, Exhaust means for discharging air from the drying chamber; a plurality of detecting means for detecting whether or not the product contained in the plurality of drying chambers has dried; and a plurality of detecting means provided outside the drying chamber. A display unit for displaying a detection result of the unit. 2. The display device according to claim 1, wherein the display means includes a plurality of indicator lights provided on a front surface of the plurality of drying chambers, respectively, for displaying detection results of the plurality of detection means. 2. The drying device according to 1. 3. The drying apparatus according to claim 1, wherein each of the plurality of detection units is configured by a timer that measures a predetermined time after the door is closed. 4. The plurality of drying chambers have a rear part opened,
A plurality of door sensors that are continuous with each other and that are configured by a single exhaust unit that is disposed near the rear portion and that is common to the plurality of drying chambers, and that detects an open / closed state of the plurality of doors, respectively; And a door lock unit that locks the other door in a closed state when the door sensor detects that one of the plurality of doors is in an open state. 4. The drying device according to any one of 1 to 3. 5. The exhaust means is configured to be able to switch its exhaust air amount between a first exhaust air amount and a second exhaust air amount larger than the first exhaust air amount. When the door sensor detects that all of the plurality of doors are in the closed state, the air flow is switched to the first exhaust air volume, and when the door sensor detects that one of the plurality of doors is in the open state, the second air flow rate is changed. The drying device according to claim 4, further comprising an exhaust air amount changeover switch that switches to an exhaust air amount.