JPS63310669A - Baking equipment for painting - Google Patents

Abstract

PURPOSE:To perform efficient baking of the front and the rear together with the sides of a carrying painted article in the carrying direction by providing an automatic operating means for automatically operating a direction-changing means based on the detected result of carried phase-detecting means so that the carrying painted article is located in front of radiation from heaters. CONSTITUTION:A carrying phase-detecting circuit 8A of a control device 8 reads the carrying phase of each automobile body A in a carrying process according to a carrying program conducted by a managing device 7. A cylinder 6 for changing a reflecting plate revolving posture is operated automatically by an automatic operating circuit 8B, the width and the direction of infrared radiation of each of the heaters 3 in these ranges are followed and changed to the carriage of the body A to print the front and the rear of the body A efficiently and promptly so that the body A as a basis in the range comes in front of the infrared radiation of the respective heaters 3 located within a fixed range X in the front and the rear in the carrying direction based on each automobile body A depending upon the carried phase read in this manner.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a paint baking device for baking painted automobile bodies, casings of home appliances, etc. The present invention relates to a paint baking device that performs baking processing using heat radiation from a heater.

[Conventional technology]

Conventionally, in the above-mentioned paint baking equipment, the heat radiation direction of the heater is fixed to be almost orthogonal to the conveyed painted object, and the conveyed painted object is heated only when it passes in front of the heater. It was designed to receive heat radiation from the vessel.

[Problem that the invention seeks to solve]

However, in the above-mentioned conventional paint baking apparatus, although the surface facing the heater when the conveyed painted article passes in front of the heater is efficiently baked,
Because it is not possible to install heaters in front and behind the conveyed object in the direction of conveyance, the front and rear surfaces of the conveyed object are insufficiently baked compared to the side surfaces of the conveyed object. Therefore, there is a problem in that the working time required to sufficiently bake each surface of the painted object increases, resulting in low working efficiency.

The purpose of the present invention is to improve the efficiency of the front and rear surfaces of conveyed painted objects by adding a rational automatic control configuration.
The object of the present invention is to enable the baking process, and to greatly improve the baking process efficiency while simplifying the arrangement of the heater as much as possible.

[Means for solving problems]

The characteristic configuration of the paint baking apparatus according to the present invention is that it is provided with a direction changing means for changing the direction of heat radiation of the heater with respect to the conveyance direction of the painted object, and conveyance phase detection that detects the conveyance phase of the painted object by actual measurement or prediction. means is provided, and the direction changing means is automatically operated based on the detection result of the conveyance phase detection means so that the conveyed coated article is located at the heat radiation destination of the heater during the conveyance process of the coated article. The automatic operating means for changing the direction of heat radiation to follow the conveyance of the painted object is provided, and its functions and effects are as follows.

[For production]

In other words, if the above-mentioned control configuration is used to automatically change the direction of heat radiation of the heater to follow the conveyance of the painted object (see Figure 1), the conveyed painted object (A) will be located at the location where the heater (3) is installed. In the process of approaching , the heat radiation from the heater (3) is
Heating is carried out on the front side of the conveyed coated article (A), although it is diagonally with respect to the conveyed coated article (A), and in the process of the conveyed coated article (A) passing in front of the heater installation location. Heat radiation from the heater (3) is carried out to the side surface of the conveyed coated article (A), and in the process of the conveyed coated article (A) moving away from the heater installation location, the heat radiates from the heater (3). The radiation is also performed obliquely to the conveyed coated article (A), but to the rear surface of the conveyed coated article (A).

〔Effect of the invention〕

Therefore, there is no need to install a heater in front or behind the conveyed object in the direction of conveyance, which would hinder the conveyance.
It is now possible to efficiently bake the front and back surfaces of the conveyed painted object along with the conveyed side surfaces, and the time required to sufficiently bake each side of the conveyed painted object can be shortened compared to conventional equipment. As a result, we were able to improve the printing efficiency.

Incidentally, in the present invention, the heat radiation direction of the heater is made variable, but instead of this, the heat radiation direction is fixed, but the front and rear surfaces of the conveyed painted object are baked by diagonal heat radiation. In order to do this, a heater for front or rear baking is installed with the heat radiation direction inclined with respect to the direction of conveyance of the painted object, and is additionally equipped to the conventional paint baking equipment, thereby blocking the conveyance of the painted object. It is conceivable that each side of the conveyed object to be painted can be efficiently baked (baked), but this would increase the number of heaters installed, complicate the overall equipment configuration, and greatly increase the equipment cost. In particular, in this type of paint baking equipment, it is common to install a large number of heaters in parallel in the direction of conveyance of the painted object. Since a large number of heaters will be installed in parallel, the total number of heaters installed will be enormous.
The problems of complicating the device configuration and increasing device cost become extremely significant.

In this regard, the present invention deals with the problem of baking the front and rear surfaces of conveyed painted objects by controlling the change in the heat radiation direction of the heater, rather than by adding a heater. This has the advantage of suppressing the complexity of the device configuration and increase in device cost.

In addition, in this type of paint baking equipment, in order to bake each side of the conveyed painted object, a plurality of heaters are installed in the conveying direction of the painted object, the heat radiation direction of which is fixed perpendicular to the conveyed painted object. A model is being considered in which the coated objects are placed side by side and transported while being rotated, but although this type allows baking of each side of the transported painted object,
At each point in the process of transporting a painted object, only some of the heaters located in front of the location where the transported painted object is installed contribute effectively to the baking process. This has the disadvantage that the baking processing efficiency is low even though a plurality of heaters are installed in parallel.

However, in the present invention, as described above, not only the process in which the conveyed coated article passes in front of the heater installation location, but also the process in which the conveyed coated article approaches the heater installation location, and
Since the heater effectively contributes to the baking process of the conveyed painted object even in the process of moving away from the heater installation location, the actual operating rate of the heater is high.Therefore, when the heaters are installed in parallel in the direction of conveying the painted object (Configuration described in claim 2)
, it is possible to obtain high baking processing efficiency even with a small number of them arranged in parallel, and together with the improvement in baking processing efficiency obtained by being able to efficiently bake the front and rear surfaces of the conveyed painted object, Extremely high printing processing efficiency can be obtained.

In summary, the advantages of the present invention are that the front and rear surfaces of the conveyed painted object can be efficiently baked along with the conveyed side surfaces, and that high baking processing efficiency can be obtained while the heater configuration is simple. We have now been able to provide a paint baking device with a

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

Figures 2 and 3 show a paint baking furnace in which a painted automobile body (A) placed on a trolley (1) is used as a conveyance device and is conveyed while being locked and conveyed by a teno drive chain (2). Heaters (3) for baking are installed in the furnace ceiling and left and right side walls in parallel in the direction of transport of the car body.

As shown in Fig. 4, the heater (3) is installed to cover the back of a straight tube type infrared lamp (4), which is arranged with its longitudinal direction perpendicular to the direction in which the vehicle body is transported. It is composed of a reflecting plate (5) having a concave mirror structure, and is designed to perform a baking process on the transport vehicle body (A) using infrared radiation.

In addition, the reflector (5) is rotatable around the axis (P) of the straight tube infrared lamp (4), and its posture can be changed freely.
6), the direction of infrared radiation from the heater (3) can be changed with respect to the transport direction of the automobile body (A).

On the other hand, the conveyance of the automobile body (A) in the furnace is carried out by linking the aforementioned drive chain (2) with the pre-process equipment that sequentially supplies the painted automobile body (A) to this paint baking furnace based on a preset conveyance program. to be executed by a computer-based management device (7) that centrally controls operation,
Thereby, the painted automobile bodies (1) are conveyed at a predetermined conveyance speed and at a predetermined conveyance pitch, and the painted automobile bodies (8) of different vehicle types are conveyed in the automatic furnace in a predetermined conveyance order.

The heaters (3) installed in parallel on the ceiling and left and right side walls of the furnace are configured to automatically change and control the direction of each infrared radiation by a control device (8).
(see Figures 1 to 3), (a) a transport phase detection circuit (a) that reads the transport phase of each automobile body (A) during the transport process from the transport program executed by the management device (7);
8A) (2)) and its carrier phase detection circuit (8A)
Based on the conveyance phase read by Just as the radiant light has a transport vehicle body (8) that is the reference for its range (X),
An automatic operation circuit (8B) is provided which changes the direction of infrared radiation of each of the range heaters (3) to follow the conveyance of the automobile body (^) by automatic operation of the cylinder (6) for changing the rotational posture of the reflector plate. Prepare yourself.

That is, for each heater (3), after the heater (3) enters within a predetermined range (X) in front and behind one transport vehicle body (A) as the vehicle body (A) is being transported, the transport vehicle body In the process where (A) approaches the installation location of the heater (3), the infrared radiation from the heater (3) is directed toward the transport vehicle body (A), albeit diagonally. In the process of passing in front of the heating device installation location, the heating device (3) should be
The heating device (3) is arranged so that infrared radiation from
deviates from the predetermined range (X) in the front and back of the vehicle body (8) as the vehicle body (^) is transported, and in the process of the vehicle body (^) moving away from the installation location of the heater (3). , so that the infrared radiation from the heater (3) is directed toward the rear surface of the conveyed vehicle body (A), albeit obliquely to the conveyed vehicle body (A). In order to automatically change the direction of infrared radiation and thereby efficiently bake the front and rear surfaces of the transport vehicle body (8) along with the transport side surfaces, the heaters (3) are installed in parallel. The purpose is to improve the actual working rate.

[Another example]

Next, other embodiments of the present invention will be listed.

(al) In the above embodiment, the conveyance phase of the painted object was predictively detected by reading from the conveyance program for automatic conveyance. A sensor of the following type may be provided, and the conveyance phase detection means may be of either type based on actual measurement or prediction.

tb) In addition to models that use infrared lamps as heaters,
Various types can be applied, such as those that radiate heat by combustion or by blowing high-temperature gas.

(C) Also, in order to change the direction of heat radiation from the heater in the direction of conveyance of the painted object, it is possible to change the direction of the heat radiating body of the heater itself, as in the above embodiment (instead of changing the direction of the reflector). However, the specific mechanical structure of the direction changing means can be changed in various ways.

(dl) The automatic operation means for changing the direction of heat radiation of the heater to follow the conveyance of the painted object by automatically operating the direction change means based on the detection result by the conveyance phase detection means may be configured using a microcomputer, or It may be configured by an analog sequence circuit (although the specific control circuit configuration can be changed in various ways).

(e) Control of changing the direction of heat radiation from the heater may be performed while taking into consideration not only the transport phase of the painted object but also the shape of the painted object.

(f) In addition to the control to change the direction of heat radiation, the intensity of heat radiation may be automatically adjusted and controlled according to the distance between the heater and the conveyed object to be coated.

(The arrangement form and number of gl 7311 heaters are not restricted.

(hl The object to be burned is not limited to automobile bodies, but may be the casings of home appliances or any other object.

+1) The direction of heat radiation may be changed so that only one of the front surface and the rear surface of the conveyed painted object is efficiently baked along with the side surface of the conveyed object.

U) The present invention can also be applied to a type in which a painted object is conveyed while being rotated.

Note that although reference numerals are written in the claims section for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of drawings]

Figures 1 to 4 show embodiments of the present invention, with Figure 1 being a control conceptual diagram, Figure 2 being a side view of the paint baking furnace, Figure 3 being a plan view of the same, and Figure 4 being a diagram of the heater. FIG. (2)... Conveyance device, (3)... Heater, (6)... Orientation changing means, (8A)...
... Conveyance phase detection means, (8B) ... Automatic operation means, (A) ... Painted object.

Claims (1)

[Scope of Claims] 1. A paint baking device that bakes a painted object (A) conveyed by a conveyance device (2) by heat radiation from a heater (3), which Painted objects with heat radiation direction (
Direction changing means (6) for changing the conveyance direction of A)
by actually measuring the transport phase of the coated object (A), or
A transport phase detection means (8A) for detecting by prediction is provided,
The direction changing means ( 6) is provided with an automatic operation means (8B) for automatically changing the direction of heat radiation of the heater (3) to follow the conveyance of the object to be coated (A). 2. A plurality of the heaters (3) are arranged in parallel in the conveyance direction of the coated object (A), and the automatic operation means (8B)
The paint baking method according to claim 1, wherein heat radiation direction change control is executed for each of the heaters (3) arranged in parallel in cooperation with the conveyance phase detection means (8A). Device. 3. The transport phase detection means (8A) is configured to detect the transport phase of the transport device (
2) The paint baking apparatus according to claim 1 or 2, wherein the conveyance phase of the coated object (A) is read from a conveyance program set in advance for automatic conveyance according to claim 1 or 2.