JP2008309366A - Drying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drying device suitable for drying a coated surface when repairing an automobile body or the like by coating a repaired part with a coating, especially coating with water base paint. <P>SOLUTION: This drying device comprises a fan, a link mechanism 10 having a driving means GM, a hot air generator 2 housing a heater and a heat accumulating member for accumulating heat from the heater in a container having a flow-in opening and a flow-out opening and converting gas fed from the fan through the flow-in opening to hot air and injecting the hot air from the flow-out opening, a blowing means 20 connected to the hot air generator so as to inject the hot air from the hot air generator, and a control means for controlling the fan and the heater and adjusting the temperature and the volume of hot air injected from the blowing means 20 within a predetermined range. The hot air generator is arranged at the link mechanism or near the link mechanism, and the blowing means is installed at the link mechanism. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a drying apparatus, and more particularly, to a drying apparatus suitable for applying a paint, particularly a water-based paint, to the repaired portion when a paint repair is performed on an automobile body or the like, and drying the coated surface. .

  For automobile body coating, etc., the undercoat is usually used for the purpose of rust prevention of the surface to be coated (sheet metal), the rust prevention effect by this undercoat and the intermediate finish to improve the finish of the next top coat, and the appearance finish is good. The coating is performed by a so-called three-coat three-bake method in which at least three coating steps of top coating are performed, and a drying step of drying the painted surface between these three coating steps. Of these coating processes, oil-based paints are often used for intermediate coating and top coating because they have excellent smoothness, gloss, sharpness, weather resistance, and the like.

  However, since this oil-based paint is diluted with an organic solvent and used, the organic solvent, for example, thinner evaporates (volatilizes) during the painting operation, and when the worker inhales the evaporated solvent, a health problem is caused. Sometimes. In addition, since the organic solvent is flammable, it must be handled with care when used, while the work place where the painting work is performed, such as a painting booth, needs to have an explosion-proof structure. Therefore, the equipment for that purpose is generally expensive.

  Since oil-based paints have the above-mentioned problems, water-based paints that are difficult to ignite and do not contain harmful components have been gradually used instead of oil-based paints in recent years. However, since this water-based paint is diluted with water and used, the organic solvent contained in the oil-based paint evaporates (volatilizes) in a few seconds, whereas the water contained in this water-based paint has a very slow evaporation rate. The evaporation usually takes a few minutes. Therefore, in order to promote the evaporation of moisture and increase the work efficiency, the painting using this water-based paint usually has a heat zone between the painting booth and the painting drying furnace at the painting site of automobile manufacturers. Yes. Note that this heat zone is also necessary to prevent the occurrence of “flaps” that are likely to occur when using water-based paints. Various types of drying apparatuses installed in the heat zone have been developed (for example, see Patent Documents 1 and 2 below).

  For example, Patent Literature 1 below includes an infrared heating unit supported by a movable stand and a blower attached above or below the infrared heating unit, and blows low-speed wind from the blower. A drying apparatus is disclosed. According to this drying apparatus, since the blower that blows low-speed air is attached to the infrared heating unit, it can be finished in a dry state suitable for the water-based paint. Patent Document 2 below includes a plurality of irradiation devices that irradiate the surface to be dried with heat rays, a blower that injects high-temperature and high-pressure air onto the coating surface through each irradiation device, and the timing and pattern of injection. There is disclosed a drying apparatus including a control means for controlling and a movable stand that supports the irradiation apparatus with respect to a surface to be dried at an angle. A quartz glass tube containing a carbon heating element is used as the heating element of this drying apparatus. Further, Patent Document 3 below discloses an infrared heater having a reflecting plate and a drying device in which the angle of an air blowing nozzle is set in the tangential direction of the outer tube of the heater means.

  Furthermore, in a general painting site, a drying apparatus including a spray nozzle, a movable support stand having a support column for mounting the spray nozzle, and a hot air blowing device for blowing hot air to the spray nozzle is used. ing. This drying device has a support stand installed in the painting booth, a hot air blower installed outside the booth, and these hot air blowers and the support stand are connected by a hose, from the hot air blower outside the painting booth. Hot air is blown to the spray nozzle in the booth, and sprayed onto the surface to be dried for drying.

JP-A-8-278080 (paragraphs [0015] to [0018], FIG. 2) JP-A-2005-172382 (paragraphs [0023] to [0026], FIG. 2) JP 2006-130440 A (paragraphs [0038] to [0040], FIG. 2)

  The drying device of Patent Document 1 ventilates the air above the painted surface to accelerate the volatilization of the solvent. Therefore, the air heated by the infrared irradiation by the ventilation is exhausted from above the surface to be dried, The heat of the painted surface is also taken away. For this reason, it is necessary to irradiate the painted surface with high-output infrared rays and to irradiate for a long time. In order to solve this problem, the drying apparatus of Patent Document 2 has been devised. However, this drying device also has a structure with a low warm air temperature and a limited air volume, so it is difficult to shorten the drying time. Furthermore, since the drying apparatus disclosed in Patent Document 3 has the same configuration, there is a similar problem. Furthermore, the drying equipment used in the general field can increase the blowing temperature if the capacity of the heater used in the hot air blowing device is increased, and the air volume increases if the capacity of the blower is increased, Since the distance from the hot air blower with a built-in heater and blower to the spray nozzle is long, it takes a long time to inject the hot air from the spray nozzle, and during this time there is a loss of heat energy and loss of drying time. It is generated and there is a limit to increase the efficiency of the drying process.

  As described above, the painting work for automobile bodies, etc. is performed by a three-coat three-bake system comprising at least three coating processes of undercoating, intermediate coating, and topcoating, and a drying process for performing a drying process therebetween. Is used, the coating and drying process time is usually 60 seconds for coating and 300 seconds for drying in units of 1 bake per coat. In this process, the drying process time is compared to the coating time of 60 seconds. 300 seconds are extremely long. As a result, in the 3-coat 3-bake system, the drying process time for evaporating the water component of the water-based paint occupies most of the time of the entire coating process, and the time is long.

  This coating and drying treatment time can be shortened by increasing the drying temperature in the drying process, but when this temperature is increased, vaporizing components such as water are vaporized in the coated film, Bubble-like film defects called “waki” are likely to occur and cause poor coating. On the other hand, when this temperature is lowered, the occurrence of “waki” is suppressed, but the drying time becomes longer. Therefore, in order to suppress the temperature rise of the surface to be coated and to shorten the drying time, it is necessary to perform a drying process under optimum conditions. In this respect, since a large-scale production facility can be introduced in a production plant such as an automobile, a drying apparatus and a drying booth capable of setting optimum drying conditions can be installed in the production facility. However, such a large-scale facility cannot be introduced in a general repair shop that performs painting repairs on automobiles that are already on the market, and even when such painting repairs are performed, painting repairs are not possible. Since the 3 coat 3 bake system is adopted, improvement of the coating quality and shortening of the coating time are major issues in the painting work using the water-based paint.

  The present invention has been made in order to solve such problems of the prior art, and the object of the present invention is to apply a paint, particularly a water-based paint, to a repaired part when repairing a paint such as an automobile body. An object of the present invention is to provide a drying apparatus suitable for drying the painted surface.

  Still another object of the present invention is to fix a hot air generator reduced in size and weight to a link mechanism, shorten the distance from the spraying means attached to the link mechanism, and minimize the loss of heat energy. An object of the present invention is to provide a drying apparatus that is limited and has improved operability of the spraying means.

  In order to achieve the above object, a drying apparatus according to claim 1 of the present application includes a heater, a link mechanism having a driving means, a container having an inlet and an outlet, a heater, and heat from the heater. A hot air generator that converts a gas blown from the blower through the inflow port into hot air and ejects the hot air from the outflow port, and is connected to the hot air generator and is connected to the hot air generator. Spraying means for injecting hot air, and control means for controlling the blower and the heater to adjust the temperature and air volume of the hot air to be injected from the spraying means within a predetermined range, the hot air generator Is arranged in the vicinity of the link mechanism or the link mechanism, and the spraying means is mounted on the link mechanism.

  According to a second aspect of the present invention, in the drying apparatus according to the first aspect, the control means moves the spraying means attached to the link mechanism to a predetermined position by controlling the driving means. It is characterized by.

  According to a third aspect of the present invention, in the drying apparatus according to the first aspect, the control means includes a blower control section that controls the blower, a temperature control section that controls the heater, and a link mechanism that controls the drive means. It has a control part and the operation part which operates these control parts, and this operation part was provided in the said spraying means integrally or in the vicinity, It is characterized by the above-mentioned.

  According to a fourth aspect of the present invention, in the drying apparatus according to the first aspect, the heat storage member is formed of a member having a plurality of ventilation paths.

  According to a fifth aspect of the present invention, in the drying apparatus according to the fourth aspect of the present invention, the member having the ventilation path is formed by corrugated fins each having the ventilation path between adjacent top and bottom portions.

  A sixth aspect of the present invention is the drying apparatus according to the fifth aspect, wherein the corrugated fin is formed into a corrugated shape by folding a metal plate having a predetermined width and length into a small width in the length direction. It is characterized by that.

  A seventh aspect of the present invention is the drying apparatus according to any one of the fourth to sixth aspects, wherein the heat storage member is aluminum or an aluminum alloy.

  Invention of Claim 8 is a drying apparatus as described in any one of Claims 4-7. WHEREIN: The said thermal storage member is accommodated in a storage case, a thermal storage body unit is formed, and at least of the storage case of this thermal storage body unit. A heat-resistant infrared absorbing paint is applied to the outer wall surface on one side, and the heater is arranged on the wall surface to which the paint is applied.

  A ninth aspect of the present invention is the drying apparatus according to the eighth aspect, wherein a plurality of the heat accumulator units are stacked and accommodated in a multi-stage with the heater interposed therebetween in the container. To do.

  A tenth aspect of the present invention is the drying apparatus according to the eighth or ninth aspect, wherein the heater is formed by covering a belt-shaped heating resistor having a predetermined width and length with a heat-resistant insulating member. The flat surface of the heating resistor is opposed to or in contact with the surface of the heat storage body of the heat storage unit.

  The invention of claim 11 is the drying apparatus according to claim 1, wherein the spraying means is formed by a first nozzle case having a space of a predetermined volume therein, and the space is formed in the space of the first nozzle case. A first outlet that discharges the rectified hot air by disposing a diffusing member that diffuses the hot air blown from the hot air generator and a rectifying member that rectifies the hot air diffused by the diffusing member. Is provided.

  The invention of claim 12 is the drying apparatus according to claim 11, wherein the spraying means is covered with a second nozzle case with a predetermined gap around the outer periphery of the first nozzle case to form a double structure, The second nozzle case is provided with a second blowout opening with a gap before the first blowout opening of the first nozzle case, and hot air is jetted through the first and second blowout openings. And

  According to a thirteenth aspect of the present invention, in the drying apparatus according to the first aspect, the link mechanism connects a pair of first and second arms having a predetermined length and ends of the first and second arms. A pair of first and second connection arms having a predetermined length are arranged in parallel, and one of the first and second connection arms is a stationary arm and the other connection arm is an exercise arm, The end of the stationary arm and one end of the first and second arms are connected to the first and second support shafts, and the end of the moving arm and the other end of the first and second arms are connected to the third and third. Four drive shafts are pivotally supported, and the drive means is provided on the stationary arm, and a transmission member is hooked between the drive means and the third and fourth support shafts of the motion arm. Suspended and driven by the driving means, the portion of the transmission member coupled to one of the third and fourth support shafts is pulled. And wherein the moving the movement arm.

  According to a fourteenth aspect of the present invention, in the drying apparatus according to the thirteenth aspect, the driving means includes a driving motor and a driving member coupled to the motor, and the first and second support shafts of the coupling arm are provided. The first and second rotating members are rotatably mounted, the drive member is disposed between the first and second rotating members, and the transmission member is passed through the first and second rotating members. It is characterized by being suspended on the drive member.

  According to a fifteenth aspect of the present invention, in the drying apparatus according to the fourteenth aspect, the rotating member is formed of a disk-shaped rotating gear, and the driving member is formed of a disk-shaped driving gear. The transmission member is suspended from a gear.

  According to a sixteenth aspect of the present invention, in the drying apparatus according to the fifteenth aspect, the transmission member is formed by a chain that is suspended from the first and second rotating gears and the drive gear by a chain that is suspended by these gears. It is characterized by that.

  According to a seventeenth aspect of the present invention, in the drying apparatus according to the sixteenth aspect, the transmission member includes an extension spring member at a portion connecting the chain and the first and second support shafts. It is characterized by being coupled to two spindles.

  The invention of claim 18 is the drying apparatus according to any one of claims 13 to 17, wherein the first and second arms are longer than the first and second connecting arms. It is formed from an arm.

  By providing the above configuration, the present invention has the following excellent effects. That is, according to the first and second aspects of the invention, the hot air generator stores a predetermined amount of heat at a predetermined temperature in the heat storage body in advance by the heat generated by the heater, and generates hot air using the stored heat as a heat source. Therefore, hot air having a desired temperature and amount of heat can be generated efficiently, and the hot air generator can be reduced in size and weight. That is, by combining a heat storage body and a heater with predetermined capacities, and adjusting the heat storage time, a predetermined amount of heat can be stored in the heat storage body at a predetermined temperature in advance. Compared with what produces | generates a hot air by ventilating to this heat source, it can produce | generate a desired hot air efficiently, without producing a heat loss. In addition, the hot air generator is reduced in size and weight so that the movement of the link mechanism is not adversely affected even if the hot air generator is fixed to the link mechanism. By fixing the hot air generator to the link mechanism, the distance between the blowing means and the hot air generator can be shortened, and the hot air generated by the hot air generator is reduced from the blowing means with minimal loss of heat energy. Can be sprayed on the material to be dried. Therefore, even if the object to be dried is a coated surface to which a water-based paint is applied, for example, the water component contained in the water-based paint can be efficiently evaporated in a short time.

  According to the third aspect of the present invention, the operation unit for operating the blower control unit that controls the blower, the temperature control unit that controls the heater, and the link mechanism control unit that controls the drive unit is provided integrally or in the vicinity of the blowing unit. Therefore, the control of the blower, the heater and the link mechanism is simplified, and the movement of the spraying means is facilitated.

  According to the invention of claim 4, by forming the heat storage body with a heat storage member having a plurality of ventilation passages, the heat storage body is expanded in contact area with air, the heat storage volume is increased, and hot air at a predetermined temperature is efficiently used. Can be generated well.

According to invention of Claim 5, 6, and 7, by making a heat storage member into a wave type fin, a contact area with air can be expanded and a heat storage volume can be increased. Further, by forming a corrugated metal plate having a predetermined width and length into a small width in the length direction, the corrugation can be easily formed.
Further, by forming the heat storage member or the like from aluminum or an aluminum alloy, the heat storage member is lightweight and has an excellent heat storage effect.

  According to invention of Claim 8, a thermal storage body unit can be easily formed by accommodating a thermal storage body in a storage case. In addition, heat-resistant infrared absorbing paint is applied to at least one outer wall surface of the storage case of the heat storage unit, and a heater is arranged on the wall surface to which the paint is applied, so that heat from the heater is efficiently transferred to the heat storage unit. Can conduct well.

  According to the invention of claim 9, a hot air generator having a large heat storage volume is obtained by storing a plurality of heat storage unit units in a multi-layered manner with a heater interposed therebetween in the container. Can do.

  According to the invention of claim 10, the heater is formed by covering a belt-shaped heating resistor having a predetermined width and length with a heat-resistant insulating member, and the flat surface of the belt-shaped heating resistor is formed on the heat storage unit. By facing or contacting the surface of the heat storage body, heat generated from the heating resistor can be efficiently conducted to the heat storage body.

  According to the invention of claim 11, the hot air blown from the hot air generator is first diffused by hitting the diffusion member in the space of the spray nozzle, and this diffused hot air is further rectified by the rectifying member. The substantially uniform hot air rectified from the first outlet is discharged, and the drying unevenness of the object to be dried can be eliminated.

    According to the twelfth aspect of the present invention, an increase in the surface temperature of the second nozzle case can be reduced by providing the spray nozzle with a double structure. That is, when a hot air is jetted from the first outlet by providing a double structure with a gap between the first and second nozzle cases and positioning the second outlet in front of the first outlet, The vicinity of the two outlets becomes a negative pressure, a relatively low temperature outside air flows through the gap between the first and second nozzle cases, a heat insulating action is activated, and the temperature rise of the second nozzle case can be suppressed.

  According to the invention of claim 13, the driving means is provided on the stationary arm, the transmission member is suspended on the hook between the driving means and the third and fourth support shafts of the moving arm, and the driving means is driven. The moving arm is moved by pulling the transmission member of the portion coupled to one of the third and fourth support shafts. That is, by pulling the transmission member, the portion of the transmission member coupled to one of the third and fourth support shafts of the motion arm away from the stationary arm side is pulled. Is pushed up or down. Therefore, as compared with the parallel link mechanism in which the driven gear provided at the end of the arm is rotated by the driving gear on the stationary arm side as in the prior art, the driving force can be remarkably reduced. As a result, even if the first and second long arms are lengthened, they can be operated by a driving means with a small capacity, and the speed can be increased.

  According to the fourteenth and fifteenth aspects of the present invention, the first and second rotating members are rotatably provided on the first and second support shafts of the stationary arm, and the driving member of the driving means is provided between the first and second rotating members. Since the transmission member is suspended from the drive member and the first and second rotating members, the third and fourth support shafts are smoothly pulled. Further, as in the invention of the fifteenth aspect, by using the rotating gear, the rotation becomes smooth.

  According to the sixteenth aspect of the present invention, since the transmission member is formed by the chains suspended on the first and second rotation gears and the drive gear by the chains suspended on these gears, the transmission of the power from the drive means is ensured. And can increase traction.

  According to the invention of claim 17, since the transmission member is coupled to the first and second support shafts via the extension spring member at the portion connecting the chain and the first and second support shafts, The motive power once acts on the extension spring member and the spring member is extended, and the exercise arm is moved by the extended spring force. Therefore, the exercise arm can be smoothly moved without applying excessive force to the drive means. Can do.

  According to the invention of claim 18, even if the lengths of the first and second arms are increased, the parallel link mechanism can be operated with a smaller driving force than in the prior art.

  Hereinafter, the best embodiment of the present invention will be described with reference to the drawings. However, the embodiment shown below exemplifies a drying apparatus for embodying the technical idea of the present invention, and is not intended to specify the present invention to this drying apparatus. Other embodiments within the scope are equally applicable.

First, an outline of a drying apparatus according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a perspective view of a state in which a drying apparatus according to an embodiment of the present invention is installed in a painting booth.
The drying apparatus 1 includes a blower (not shown), a hot air generator 2 that heats the air blown from the blower to convert it into high-temperature hot air, and a blow that blows hot air from the hot air generator 2 on the coating surface. A link mechanism 10 having a drive nozzle 20, a hot air generator 2 and a spray nozzle 20 and a drive means for moving the spray nozzle 20, and a control means 38 for controlling the drive means of the link mechanism (FIG. 14). Reference).

The drying apparatus 1 is installed and used in a coating booth BT having a predetermined size, for example, a size that can accommodate an automobile or the like. The painting booth BT includes a floor surface BE that is large enough to accommodate an automobile or the like, side walls WL ₁ and WL ₂ that are erected from the outer periphery of the floor surface BE and are higher than the height of the automobile, and these side walls WL _1. , And a ceiling wall that covers the upper side of WL ₂ , an entrance through which an automobile is carried in and out is provided on one side wall, and an openable / closable door is attached to the entrance. In FIG. 1, the side walls and the ceiling wall respectively facing the side walls WL ₁ and WL ₂ are omitted, and the doorway and the open / close door are provided on one side wall. This painting booth BT is provided with a ventilation device (not shown) so that the inside of the booth can be ventilated during painting work. The one side wall WL ₁ is provided with two horizontal rails R ₁ and R ₂ arranged horizontally at a predetermined interval in the vertical direction, and an upright rail R ₃ movably connected between these rails. It has been. Upright rail R _3, the link mechanism 10 is coupled by a vertically movable coupling means C _R. Accordingly, the link mechanism 10 is movable up and down with respect to the upright rail R ₃ , and the upright rail R ₃ is coupled to the horizontal rails R ₁ and R ₂ so as to be movable in the horizontal direction. The spray nozzle 20 connected to the tip can be moved to any location of an object to be painted such as an automobile.

Next, each member which comprises a drying apparatus is demonstrated with reference to FIGS.
First, the structure of a hot air generator is demonstrated with reference to FIG. 2, FIG. 2 shows the hot air generator of FIG. 1, FIG. 2 (a) is an external perspective view of the hot air generator, FIG. 2 (b) is an exploded perspective view of FIG. 2 (a), and FIG. 3A is a partial plan view of the heater, FIG. 3A is a cross-sectional view taken along line AA in FIG. 2A, FIG. 3B is a cross-sectional view taken along line BB in FIG. (C) is an enlarged view of the _XB part of FIG.3 (b).
The hot air generator 2 includes a plurality of (for example, four) heat storage units 6 (6a to 6d) and a plurality (for example, two sets) of heaters 9 (9a) for heating the heat storage bodies in these heat storage units 6a to 6d. 9b), and the heat storage units 6a to 6d and the heaters 9a and 9b are accommodated in the container 3. The container 3 is provided with an air inlet 3a at one end and an outlet 3b at the other end. The air blown from the inflow port 3a is heated to a high temperature while coming into contact with the respective heat storage bodies of the heat storage units 6a to 6d, and is discharged as hot air from the outflow port 3b.

Container 3 has a body case 3A of relatively shallow box-shaped having an opening 3 ₀ upwards, has a lid 3B for covering the opening 3 ₀ of the body case 3A, the lid 3B is the body case 3A Removably fixed. The main body case 3A has a size in which a plurality of heat storage units 6a to 6d and heaters 9a and 9b are stacked and accommodated. That is, the body case 3A is perforated with rectangular bottom plate portion 3 ₁ having a predetermined length and width dimension, and a side plate portion 3 _{2-3 5} from the outer periphery erected at right angles to the bottom plate 3 ₁ and, opening 3 ₀ is formed above, it is formed heat-resistant material, for example a metallic material or synthetic resin material. This is the inlet 3a and the outlet 3b in the longitudinal ends of the side plate portion 3 ₂ of the container 3 is formed, these inlets 3a and respectively the outlet 3b connecting pipe 4a, 4b is mounted. These connecting pipes 4a and 4b are fitted with hoses having a predetermined diameter, for example, 50 mm. A flow rate sensor and a pressure sensor (not shown) are attached in the vicinity of the outlet 3b, and the amount of air blown from the blower and the wind pressure are detected by these sensors. Incidentally, the blower, not shown, for example, 1.9 kW, wind pressure 0.02MPa～0.035MPa, air volume is 2.8m ³ /min~5.2m ³ / min. In addition, a terminal board (not shown) is installed in the container 3, and each heater 9a, 9b is connected to a lead wire connected to a power source via this terminal board. The hot air generator 2 includes a temperature sensor Sen1 (see FIG. 11) for detecting the temperature in the container 3 and a temperature sensor Sen2 (see FIG. 11) for detecting the temperature in the vicinity of the outlet 3b at a substantially central portion in the container 3. It is installed. The temperature in the container 3 is detected by these temperature sensors Sen1 and Sen2, and is controlled by temperature control means 40, which will be described later, so that the temperatures at these locations become predetermined set temperatures T1 and T2, respectively (FIG. 11).

Heater 9, as shown in FIG. 2 (c), chromatic and the heat generating resistor 9 ₁ of strip-like having a predetermined width dimension and length, and a terminal portion 9 ₂ connected to both ends of the resistor The resistor is covered with a heat-resistant member, for example, a quartz tube 9 ₄ (see FIG. 3C). The heat generating resistor 9 _1, by meandering into a substantially S-shape, it is preferable to increase the resistance. This heater is formed by a heater formed by covering a heating resistor with a transparent heat-resistant insulating member, for example, a carbon lamp heater. By using this lamp heater, the heat energy of the heating element can be directly transmitted to the heat storage body as radiant heat by infrared rays, and the thermal response is much better on / off than using the heater that transmits the temperature by heat conduction. Accurate temperature control without overrun due to thermal delay is possible. As a result, a safe hot air generator that can be used in a dangerous place where a solvent having a low ignition temperature is used can be realized.

Lid 3B are formed in a shallow box-shaped case having a size to cover the opening 3 ₀ of the main body case 3A. That is, the lid 3B has an upper plate portion and a side plate portion that hangs down from the outer periphery of the upper plate portion, and is formed of the same heat-resistant material as the main body case 3A. Moreover, attachment members 5a and 5b are attached to the opposing side plate portions.

  The container 3 contains four heat storage units 6 (6a to 6d) and two sets of heaters 9 (9a, 9b) inside, and then covers the outer periphery with a heat insulating member (not shown). The surface temperature is set to a predetermined temperature, for example, 40 ° C. or lower. By covering the container with this heat insulating member, heat radiation from the inside is reduced, and loss of heat energy can be reduced. Further, even if the operator touches the hot air generator 2 during the painting operation, no burns or the like are caused.

The heat storage unit 6 will be described with reference to FIG. Incidentally, FIG. 4 shows a heat storage unit, _{X C} direction in FIG. 4 (a) is a side view of one of the thermal storage unit as viewed from the _{X A} direction of FIG. 2 (b), FIG. 4 (b) FIGS. 4 (a) It is the side view seen.
As shown in FIG. 4, the heat storage unit 6 includes wave-shaped heat storage fins 8 that serve as heat storage bodies (heat storage members), and a storage case 7 that stores the heat storage fins 8. The housing case 7 has a relatively long bowl-shaped case 7a that is substantially U-shaped, and a lid plate 7b that covers the opening of the bowl-shaped case 7a.

Pair trough case 7a has a rectangular bottom plate ₇₁ having a predetermined width dimension W ₁ and length L _1, which is perpendicularly bent in the same direction from the longitudinal side edges of the bottom plate 7 ₁ side plates ₇ 2 opposing the height _{H 1} of the _{7 3,} and an opening _{7 0} which is open between both side plate portions ₇ 2, _{7 3,} overall a substantially U-shaped, predetermined thickness D ₁ metal material. This metal material is, for example, aluminum or an aluminum alloy, and has a black anodized finish on the surface. By applying this processing, the heat storage effect is improved. The specific dimensions of the housing case 7 are, for example, a width length W ₁ of 70 mm, a length L ₁ of 400 mm, a side plate portion height H ₁ of 38.8 mm, and a metal plate thickness D ₁ of 1. .2 mm.

Cover plate 7b is made of a plate-shaped body having a size to cover the opening 7 ₀ of trough-shaped casing 7a, are formed of the same material as the trough-shaped casing 7a. A heat-resistant infrared absorbing paint is applied to the surface of the lid plate 7b. This application surface is a surface that comes into contact with each of the heaters 9a and 9b, and the thickness thereof is, for example, 1.2 mm.

The heat storage fin 8 is formed of a corrugated molded body obtained by bending a metal plate 8a. That is, the heat storage fins 8 are approximately the same width dimension as the length L ₁ of the tub-shaped casing 7a, a metal plate 8a having a predetermined thickness and length, the metal plate 8a of the tub-shaped casing 7a high is the corrugated entire folded like bellows short in height H ₂ from the H _1, being formed as a molding in which a gap 8 ₀ between the top edge portion and the bottom portion of the corrugated. The gaps 8 ₀ has a ventilation passage through which air passes. The metal plate 8a of the heat storage fin 8 is preferably formed of aluminum or an aluminum alloy, and the surface thereof is preferably black anodized. The top and bottom of the corrugations are U-shaped or V-shaped. The dimensions of the wave-type molded metal member 8a, for example, plate thickness 0.25 mm, the height _{H 2} is 25.4 mm, number of peaks in the 15 ± 1 mountain, the pitch of each mountain is 2.5 mm.

Assembly of the heat storage unit 6, by inserting the heat storage fin 8 from the opening 7 ₀ of tub-shaped casing 7a, covering the opening 7 ₀ cover plate 7b. Thereafter, the bowl-shaped case 7a, the heat storage fins 8 and the cover plate 7b are integrated using fixing means such as brazing, and the assembly is completed.

In assembling the hot air generator 2, first, four sets of heaters 9 a and 9 b are interposed between the four heat storage units 6 a to 6 d in the main body case 3 </ b> A and stored in four stages. At this time, as shown in FIG. 3 (c), the heater 9a, the flat surface of the heat generating resistor 9 ₁ 9b is cover plate 7b surface opposed each heat storage units 6 a to 6 d, i.e. by the parallel Arrange. Thereafter, covered with a lid 3B to the opening _{3 0} of the main body case 3A, to secure the lid 3B the body case 3A. The terminal portions of the heaters 9a, 9b, via a terminal plate 9 ₂ is connected to a lead wire 9 _3, the lead wire 9 ₃ are connected are led out of the container 3 to the power supply or the like. The outer periphery of the container 3 is packed with a heat insulating material (not shown).

Hot-air generator 2 assembled in this way, each of the heater 9a, since the flat surface of the heat generating resistor 9 ₁ 9b is arranged opposite to the cover plate 7b face each thermal storage units 6 a to 6 d, the lid facing area of the plate 7b and the heating resistors 9 ₁ increases, the heat generated from the heat generating resistor 9 ₁ is conducted to efficiently cover plate 7b surface and the heat storage fins 8. Further, since the heat-resistant infrared absorbing paint is applied on the surface of the lid plate 7b, the heat from the heaters 9a and 9b is efficiently conducted to the heat storage fins 8 through the coating material.
In the hot air generator 2, since the heat storage member is unitized, it is possible to generate desired hot air by increasing or decreasing the number of the heat storage members. That is, by combining a predetermined number of the heat storage units 6 and the heaters 9, the heat storage amount and the hot air temperature can be changed, and the heat storage amount can be adjusted by the heat storage time. Therefore, compared to a conventional hot air generator composed of an infrared lamp and a blower, the desired hot air can be efficiently generated without loss of thermal energy, and the hot air generator 2 can be reduced in size and weight. Can do. For example, when the heaters 9a and 9b of 7.2 kW are used, the temperature in the container 3 can be increased to 300 ° C. and the weight can be increased to approximately 1.6 kg. If it is this weight, even if it attaches to the link mechanism 10, it will not interfere with the movement of this link mechanism. Moreover, the outer periphery of the container 2 is covered with a heat insulating material so that the surface temperature is 40 ° C. or lower. In this embodiment, although the heat storage body (heat storage member) was formed with the wave-shaped heat storage fin, it is not limited to this, You may use various heat storage members. For example, a columnar member having a predetermined length, for example, a metal columnar member provided with a plurality of through holes in the longitudinal direction, or a plurality of metal cylindrical bodies having different diameters are concentric with a gap therebetween. And so on.

Next, the link mechanism will be described with reference to FIGS. 5 and 6 show the link mechanism, FIG. 5 (a) is a top view of the link mechanism, FIG. 5 (b) is a side view of the link mechanism, and FIG. 6 (a) is the link of FIG. 5 (b). 6B is a side view of the mechanism with the gear motor removed and the gear exposed, FIG. 6B is a side view of the spray nozzle lowered from the position of FIG. 6A, and FIG. The enlarged view of the _XD part of a), FIG.7 (b) is sectional drawing of CC line of Fig.7 (a).
As shown in FIGS. 5 and 6, the link mechanism 10 includes two first and second long arms 12 ₁ , 12 ₂ arranged in parallel and _first and _second joints connecting both ends of each arm. 2 long arms ₁₂ 1, 12 first of short compared to _2, the second connecting arm ₁₂ 3, and a 12 _4, first, a second long arm ₁₂ 1, 12 ₂ end the 1, and the second connecting arm ₁₂ 3, 12 ₄ of the end portion, and has a parallel link mechanism 11 which is pivotally supported by the first to fourth support shafts _131-134 respectively. The parallel link mechanism 11 can be deformed and moved while maintaining the parallelogram shape. The length of the first and second long arms 12 ₁ and 12 ₂ is, for example, 1000 mm, and the length of the first and second connection arms 12 ₃ and 12 ₄ is, for example, 130 mm.

The first, the second connecting arm ₁₂ 3, 12 second connecting arm 12 ₄ of one of the _4, gear motor GM starting means for driving the link mechanism 10 is attached. The second connecting arm is a stationary arm fixed to the support member. The gear motor GM has a drive gear 14c. The driving gear 14c, the first, is rotatably secured to the second support shaft ₁₃ 1, 13 ₂ from the straight line connecting the second connecting arm 12 _4. The drive gear 14c is connected to the gear motor GM, and the drive gear 14c is rotated clockwise and counterclockwise by the rotation of the motor. Disk-shaped first and second rotating gears 14a and 14b having substantially the same diameter are fixed to the first and second support shafts 13 ₁ and 13 _{2 so as} to be rotatable. That is, the rotary gears 14a, 14b is first, and is free to rotate in the second support shaft ₁₃ 1, 13 _2. The drive gear 14c and the rotary gears 14a and 14b are each provided with angled teeth with a predetermined pitch on the outer peripheral edge thereof.
The second connecting arms 12 _4, drive gear 14c and the first and second rotating gear 14a, 14b is arranged in a zigzag, the chain 15 ₁ of the transmission member 15 is suspended in the gears. Transmission member 15, the first rotating gear 14a and between the fourth support shaft 13 _4, and the second rotating gear 14b and the third support shaft which second fixed on a support shaft 13 ₂ fixed to the first support shaft 13 ₁ 13 and ₃ are suspended in a crossing manner. The transmission member 15 includes a predetermined length of the belt body ₁₅ 2, 15 _3, and a chain 15 ₁ which is connected to a substantially middle portion of the belt member, the ends of the belt member ₁₅ 2, 15 ₃ each extension spring ₁₅ 4, 15 respectively ₅ interposed a third, secured to the fourth shaft ₁₃ 3, 13 _4.
The second long arm 12 _2, hot-air generator 2 is fixed. Since the hot air generator 2 has the above structure, made smaller and lighter than those equipped with a conventional plurality of infrared lamps, it is secured to the second long arm 12 ₂ parallel link There will be no hindrance to the operation of the mechanism. Incidentally, the hot air generator has been secured to the second long arm 12 _2, elsewhere, for example, may be fixed to a upright rail R ₃ in the vicinity of the spray nozzle or spray booth.

The first connecting arm 12 _3, as shown in FIG. 7, and is rotatably coupled to allow dynamic horizontal lateral twice by a horizontal arm 16 fixed member 17. That is, the horizontal arm 16 is coupled by a shaft 16 ₁ to the fixing member 17. A slide arm 18 is slidably coupled to the horizontal arm 16. A support arm 19 that hangs downward from the tip of the slide arm 18 is coupled to the left and right in the horizontal direction (direction a in FIG. 7A). Further, the lower end of the support arm 19, spray nozzle 20 is movably fixed pivot 19 ₂ in the vertical direction (b direction in FIG. 7 (a)). Incidentally, the first connecting arm 12 ₃ has a movement arm.

With this configuration, the horizontal arm 16 is enlarged with respect to first connecting arm 12 _3, will be able to swing with a large amplitude to the left and right horizontal direction, the moving range of the front end portion of the slide arm 18 which is mounted on the arm Is done. Further, since the support arm 19 is pivotally supported by the slide arm 18, it can be rotated horizontally and horizontally (a direction in FIG. 7A) with a small amplitude. Therefore, the horizontal arm 16, the slide arm 18 and the support arm 19 enable an operation combining a swing with a large amplitude and a rotation with a small amplitude in the horizontal direction, and the spray nozzle 20 attached to the support arm 19 has a wide range. It can be moved with. Also, spray nozzles 20 can move up and down because it is fixed by the pivot 19 ₂ on the support arm 19. With these structures, the spray nozzle 20 can be moved in a wider range and at the same time, can be swung freely.

The operation of the link mechanism 10, the gear motor GM, when the drive gear 14 _C is rotated in a clockwise direction in FIG. 6, the belt body 15 ₂ of the transmission member 15 is moved from right to left, the belt of the transmission member 15 body 15 ₃ is moved from the left to the right direction. This movement, the first connecting arm 12 ₃ rises upward (see FIG. 6 (a)). With this rise, the spray nozzle 20 is also lifted upward. Further, when the drive gear is rotated in the counterclockwise direction in FIG. 6, the belt body 15 ₂ of the transmission member 15 is moved from left to right, the belt body 15 ₃ of the transmission member 15 is moved from right to left . This movement, first connecting arm 12 ₃ is lowered downward (see Figure 6 (b)). With this descent, the spray nozzle 20 also descends downward. The operation of the link mechanism 10 is performed by operating a switch device 27 provided in the spray nozzle 20.

The structure of the spray nozzle will be described with reference to FIGS. 8 (a) is an external perspective view of the spray nozzle, and FIG. 8 (b) is a perspective view seen through the interior as viewed from the direction of X _E in FIG. 8 (a), FIG. 9 Fig. 8 (a) FIG. 10A is a cross-sectional view taken along the line E-E in FIG. 9, and FIG. 10B is a cross-sectional view taken along the line F-F in FIG. 9.
The spray nozzle 20 is provided with an air inflow portion at one end and a blowout port at the other end, and an inner case 21 in which a space SH of a predetermined size is formed inside, and a predetermined gap S around the outer periphery of the inner case 21. ₁ has an outer case 22 that covers the opening ₁ and a diffusion plate 36 and a current plate 37 mounted in the inner case 21. Inner case 21, as shown in FIG. 8 (b), 9 and FIG. 10 (a), the upright and the bottom plate portion 21 ₁ of the ship bottom shaped sharp pointed at an acute angle from the outer periphery of the bottom plate portion 21 ₁ a side plate portion ₂₁ 3, 21 ₄ that is, closing the upper ends of the side plate portions ₂₁ 3, 21 _4, and the upper plate 21 ₂ of the bottom plate portion 21 ₁ and the same shape, has, inside the space SH is formed The metal plate material is bent and welded. The inner case 21, the front tip portion of the side plate portion 21 _3, 21 ₄ a pair of opposed, first blowout opening 21 _N of the interval was narrowed narrow groove is formed (FIG. 10 (a) reference). Further, on the rear side of the side plate portions ₂₁ 3, 21 _4, the opening 21 ₀ of a predetermined size is formed (see FIG. 9).

The inner case 21 is partitioned into two spaces SH by mounting a rectifying plate 37 at a substantially central portion of the space SH formed therein. The partitioned space is a diffusion chamber 21a and a rectifying chamber 21b with the rectifying plate 37 as a boundary. The diffusion chamber 21a is provided with a diffusion plate 36, the diffusion plate 36, as shown in FIG. 8 (b), a predetermined consists size of the plate-like body, the hot air flow of being connected to an opening 21 ₀ It is fixed at a position opposite to the outlet of the through hole 24 ₀ of the tubular body 24 of the inlet. The diffusion plate 36 is made of a heat resistant material. By providing the diffusing plate 36 in this manner diffusion chamber 21a, hot air is blown from the through hole 24 ₀ of the tubular body 24 is diffused in all directions by the diffusion plate 36, feed is distributed to the current plate 37 It is done. Behind the aperture 21 ₀ is closed by the lid 23. A substantially central portion of the lid 23, the cylindrical body 24 having a through hole 24 ₀ therein is attached. The tubular body 24 has a hose H connected to the tip thereof. Further, a switch device 27 is attached to the spray nozzle 20. As shown in FIG. 8A, the switch device 27 is erected with a pair of mounting members 26 facing the base 28 of the switch device 27, and the mounting member 26 is attached to a mounting tool having a support shaft 25. By being fixed to the cylindrical body 24 of the spray nozzle 20 in a freely rotatable manner, it is attached to the spray nozzle 20.

The outer case 22 includes upper and lower plate portions 22 ₁ and 22 ₂ and a pair of side plate portions 22 ₃ and 22 ₄ having substantially the same shape as the inner case 21, as shown in FIGS. 9 and 10A. outer periphery of the inner case 21 in the plate portion ₂₂ 1-22 _4, that is, covers a gap _{S 1} on the outer periphery of the upper and lower plate portions ₂₁ 1, 21 ₂ and the side plate portions ₂₁ 3, 21 ₄ of the inner casing 21. The outer case 22 is also produced by bending and welding a metal plate material. Also forms a pair of opposed side plate portions 22 3 of the outer casing _22, 22 ₄ of the tip and the second blowout opening 22 _N fine groove is narrowed its gap. The second blowoff opening 22 _N is extended to the other party from the first blowout opening 21 _N. The first and second outlets 21 _N and 22 _N serve as the outlet N of the spray nozzle 20, that is, the outlet.

With this configuration, as shown in FIG. 10 (a), a hot air St1 in the space SH of the inner casing 21 is ejected from the first blowout opening 21 _N. This blow, near the exit _{22 G2} of the second blowout opening 22 _N negative pressure, i.e. a vacuum. As a result, the negative pressure phenomenon, the gap _{S 1} between the inner case 21 and outer case 22, the outside air St2 is discharged from sucked outlet _{22 G2} from the inlet _{22 G1} of the gap _{S 1.} Due to the flow of the outside air St2, heat conduction from the inner case 21 to the outer case 22 is suppressed. Therefore, the outer case 22 is not abnormally overheated. Specifically, by setting the gap to 10 mm, the surface temperature of the outer case 22 can be set to about 40 ° C. even if the internal temperature is 150 ° C. to 200 ° C.

As shown in FIG. 10 (b), the rectifying plate 37 is made of a heat-resistant material made of a plate-like body having opposed long sides and short sides that are large enough to partition the substantially central portion of the inner case 21. ing. A plurality of rectifying holes having different hole diameters are formed in the rectifying plate 37 from the central portion in the longitudinal direction toward both end portions. This straightening hole is divided into three first to third zones 37a to 37c having different hole diameters in the longitudinal direction. Specifically, a first zone 37a is formed at the longitudinal center of the rectifying plate 37, and third zones 37c are formed at both ends in the longitudinal direction, and between the first zone 37a and the third zone 37c. A second zone 37b is formed. Open the longitudinal direction of the current plate 37 Y, when the direction orthogonal to the Y direction and X, in the first zone 37a, X and Y direction diameter of the rectifying holes 37 ₁ each predetermined number, the predetermined distance Are aligned. The number is, for example, 4 in the X direction and 5 in the Y direction. The second zone 37b, similarly, the rectification hole 37 ₂ having the middle diameter is respectively a plurality arranged in X and Y directions. Similarly, the third zone 37c, the rectification hole 37 ₃ of the large-diameter are respectively plural arranged in X and Y directions. The diameter of each straightening hole is 4.0 mm, the diameter of the medium straightening hole is 5.0 mm, and the diameter of the large straightening hole is 6.0 mm.

  If the diameter of the rectifying hole is not adjusted, that is, if the blowing nozzle equipped with this rectifying plate 37 has the same hole diameter, the hot air has a high flow rate at the center and the air volume decreases toward the end. In other words, the hot air gathers at the center away from the first blowout port 21N, and the end portion is reduced and is not uniform. On the other hand, when the hole diameter at the end is increased, the decrease in the air volume can be reduced. Therefore, by changing the hole diameter as described above, a substantially uniform air volume can be obtained.

As described above, when hot air is blown from the cylindrical body 24, the blown hot air collides with the diffusion plate 36 and is diffused in the diffusion chamber 21 a, and the flow straightening holes 37 _{1 to} 37 of the flow straightening plate 37. ₃ and enters the rectifying chamber 21b. In this case, although the hot air is diffused by the diffusion plate 36 passes through the rectifying plate 37, since the rectifying holes 37 ₁ to 37 ₃ are provided with different hole diameters, hot air passing through the rectifier plate 37 rectifying plate 37 The amount of hot air supplied from the outlet N is uniform in the longitudinal direction. Moreover, since the vicinity of the outlet _{22 G2} of the second blowout opening 22 _N becomes negative pressure, the outlet _{22 G2} outside air St2 is sucked from the inlet _{22 G1} of the gap _{S 1} between the inner case 21 and outer case 22 by the negative pressure phenomenon It is discharged from. Due to the flow of the outside air St2, heat conduction from the inner case 21 to the outer case 22 is suppressed. Therefore, the outer case 22 is not abnormally overheated, the temperature rise of the outer case 22 is suppressed, and the operator is not burned.

With reference to FIG. 11, FIG. 12, the temperature and the wind speed of the hot air injected from a spray nozzle are demonstrated. FIG. 11 is a schematic diagram showing measurement points at a predetermined distance from the spray nozzle, and FIG. 12 shows the measurement results.
The results shown in FIG. 12 were obtained by measuring the temperature and the wind speed at the center of the spray nozzle outlet with two types of blower outputs of 90H _Z and 100 Hz, and distances from the nozzle outlet of 100 mm, 200 mm, and 300 mm, respectively.

Next, the switch device will be described with reference to FIG. 13 shows the switch device, FIG. 13 (a) is an external perspective view of the switch device, and FIGS. 13 (b) to 13 (d) are cross-sectional views of the switch device of FIG. 13 (a). It is sectional drawing shown, Comprising: It is explanatory drawing explaining switch operation | movement.
The switch device 27 is a hand switch that is fixed to the spray nozzle 20 and changes the position of the spray nozzle and controls the blower and the like. As shown in FIG. 13, the switch device 27 includes two micro switches MS ₁ and MS ₂ , a switch operation member 30 that operates the micro switches MS ₁ and MS ₂ , and a push button switch 35. Each of the microswitches MS ₁ and MS ₂ is housed in a switch box 29, and the switch operation member 30 and the push button switch 35 are fixed to the switch box 29. The push button switch 35 is housed in a small box 34, and the small box 34 is fixed to the switch box 29. The switch box 29 has a base 28 at the top. The switch box 29 is provided with _two micro switches MS ₁ and MS ₂ facing each other, and a switch operating member 30 is located between the micro switches MS ₁ and MS ₂ . Each of the microswitches MS ₁ and MS ₂ has operating protrusions M ₁ and M ₂ , respectively, and is fixed so that the operating protrusions M ₁ and M ₂ are vertically different positions. When the operation protrusions M ₁ and M ₂ are pressed by the switch operation member 30, the switch is turned on. These microswitches MS ₁ and MS ₂ are already known, and known ones are used in this embodiment.

The switch operating member 30 includes a first hollow tube 31 having a predetermined length and a hollow second hollow tube 32 inserted from the lower end of the first hollow tube 31. The second hollow tube 32 is fitted from the lower end of the first hollow tube 31 so that it can slide along the first hollow tube 31. The first hollow tube 31 is fixed to a substantially central portion of the base 28 and passes through the switch box 29 from the base 28 and hangs downward by a predetermined length. The first hollow tube 31, the internally to stretch the spring SP ₁ is inserted, the lower end of the extension spring SP ₁ is fixed to the lower end 31 of the _first hollow tube 31. The second hollow tube 32 is compressed pulling SP ₂ and the guide rod 33 therein is inserted, the lower end 33a of the guide rod 33 is fixed to the lower end 32 ₁ of the second hollow tube 32. The guide rod 33 is inserted through the springs SP ₁ and SP ₂ , and the lower end 33 _b is fixed to the upper end of the extension pulling SP ₁ . Further, this second hollow tube 32, provided on the first, second protrusions ₃₂ 1, 32 ₂ are opposed position to press the micro switch _MS 1, actuating projection _M 1 of MS _{2, M 2} above It has been.

The switch device 27 is operated by turning on / off each of the micro switches MS ₁ and MS ₂ by the vertical movement operation of the second hollow tube 32 of the switch operation member 30. Specifically, the gear motor GM is operated by the ON / OFF operation of the micro switches MS ₁ and MS ₂ , and the spray nozzle 20 is moved up and down via the link mechanism 10. That is, the switch operating member 30 is configured such that when the spray nozzle 20 is not operated, that is, in a standby state, as shown in FIG. 32 ₁ and 32 ₂ do not come into contact with the operation protrusions M ₁ and M ₂ of the first and second micro switches MS ₁ and MS ₂ , and these switches are in the OFF state.

In this state, a gel pushing the second hollow tube 32 of the operating member 30, ₂ second projection 32 presses the second actuating projection _{M 2,} the second micro switch MS ₂ is ON (FIG. 13 ( d)). The ON operation of the second micro switch MS _2, the gear motor GM is actuated spray nozzle 20 via a link mechanism 10 is moved upward. Further, when the second hollow tube 32 is pushed down, the first protrusion 32 ₁ comes into contact with and presses the first operating protrusion M ₁ to turn on the first micro switch MS ₁ (see FIG. 13B). The gear motor GM is actuated by the ON operation of the first micro switch MS ₁ , and the spray nozzle 20 is moved downward via the link mechanism 10. Further, by pressing the push button switch 35, the blower is switched from the low speed operation to the high speed rotation, and at the same time, the heater is switched from the low temperature to the high temperature. This switching will be described later.

  Therefore, since the switch device 27 is fixed to the spray nozzle 20, the operator moves the second hollow tube 32 of the operation member 30 of the switch device at hand at the time of painting work to move up and down. The attachment nozzle 20 can be easily moved to a desired position. Further, by pressing the push button switch 35, the blower is switched from the low speed operation to the high speed rotation, and at the same time, the set temperature of the heater is switched to perform the drying operation, and the pressing of the push button switch 35 is stopped. Thus, the blower is switched from the high speed operation to the low speed operation, and the set temperature of the heater is also switched. By operating the push button switch 35, predetermined hot air can be ejected from the spray nozzle 20. In addition, although this switch apparatus 27 was fixed to the spray nozzle 20, you may enable it to mount | wear in the vicinity, without fixing directly.

With reference to FIGS. 14-16, the control method of a drying apparatus is demonstrated. 14 is a block diagram of the control means for controlling the drying apparatus, FIG. 15 is a control chart of the control means of FIG. 14, and FIG. 16 is an explanatory chart of an enlarged chart of portion A of FIG.
The control means 38 includes a blower control unit 39 that controls the blower 42, a temperature control unit 40 that controls the temperature of the heater 9 in the hot air generator 2, and a link mechanism control unit 41 that controls the link mechanism 10. is doing. The control means 38 is connected to a power source via a main switch SW (not shown), and sends a control signal to each device by a signal from the switch device 27.

Below, the control method of the drying apparatus 1 using this control means 38 is demonstrated.
First, when the main switch SW is turned on at a time t1 after a predetermined time has elapsed from the rest time t0, predetermined power is supplied from a power source (not shown) to the heater 9 and the blower 42 in the hot air generator 2. With this power supply, the motor of the blower 42 rotates at a low speed (2400 rpm), and at the same time, the power supply to the heater 9 is controlled by the temperature control unit 40, and the inside of the hot air generator 2 is heated to the set temperatures T1 and T2, respectively. Is done. That is, the inside of the hot air generator 2 is heated to 160 ° C. of the set temperature T1, and the outlet 3b is heated to 200 ° C. of the set temperature T1. A predetermined amount of heat is stored in the heat storage unit 6. The heat storage in the heat storage unit 6 and the low-speed operation of the blower are continued from the time point t1 to the time point t3. During this time, hot air heated to a predetermined temperature is injected from the spray nozzle 20. Since the blower is operated at a low speed, this hot air is a breeze with a low wind pressure. When the main switch SW is turned on, the hot air generator 2 is heated to the set temperatures T1 and T2 by feeding from the power source, respectively, so that when the push button switch 35 is turned on in the next process, The hot air generator operates quickly.

  When the push button switch 35 of the switch device 27 is turned on at a time t2 after a predetermined time from the time t1, the blower is switched to a high speed operation of 7200 rpm, and at the same time, the supply power to the heater 9 is increased by the temperature control means 40. Thus, the inside of the hot air generator 2 is changed to 170 ° C., which is the set temperature T1, and the outlet 4b is changed to 210 ° C., which is the set temperature T1. This change in the set temperatures T1 and T2 causes the blower to switch from the low speed operation (2400 rpm) to the high speed operation (7200 rpm), and the strong air of the outside temperature is sent to the hot air generator 2 to reduce the temperature inside the hot air generator 2. This is to reduce it. That is, when the blower 42 is switched from the low speed operation (2400 rpm) to the high speed operation (7200 rpm), the strong air of the outside air temperature is sent to the hot air generator 2, and the temperature in the hot air generator 2 is indicated by a dotted line Tb in FIG. To decline. Therefore, the set temperatures T1 and T2 of the hot air generator 2 are increased by a predetermined temperature, for example, 10 ° C., and the heater power P corresponding to the temperature increase is supplied. That is, when approximately 100% of the heater power P is supplied to the heater 9 at time t1, a predetermined amount of heat is stored in the heat storage unit 6 due to heat generated by the heater 9, and the inside of the hot air generator 2 is outside air temperature (for example, From 25 ° C.) to the set temperature T2 (200 ° C.). After a predetermined amount of heat is accumulated in the heat storage unit 6, even if the heater power P is reduced from 100% to 30%, it does not fall from the set temperature. When the blower is switched to high speed operation in this state, the heat storage unit 6 is cooled by the strong wind, and the temperature in the hot air generator 2 decreases as shown by the dotted line in FIG. However, the temperature control means 40 sets each set temperature T1, T2 higher by 10 ° C. and increases the heater power P. Therefore, even if the temperature in the hot air generator 2 decreases due to the high speed operation of the blower, the decrease Is immediately restored in a short time, and a stable hot air of approximately 200 ° C. is blown from the outlet 3b as shown by a solid line Ta in FIG. If the set temperature is not increased, as indicated by the dotted line Tb in FIG. 16, the temperature drop in the hot air generator is large and the recovery is delayed, so that stable hot air cannot be supplied. Returning to FIG. 15, when the push button switch 35 is turned off at time t3, the blower 42 is switched from the high speed operation to the low speed operation, and the temperature in the hot air generator 2 returns to approximately 200 ° C., and at this temperature. When the heat storage unit 6 is stored and the push button switch 35 is turned on again at time t4, the blower 42 is switched from the low speed operation to the high speed operation and the hot air generator 2 is set to a high temperature so that the strong air is generated. Hot air of a predetermined temperature is jetted from the spray nozzle 20 while compensating for the temperature drop.

  The hot air of about 200 ° C. blown from the outlet 3b of the hot air generator 2 is sent to the spray nozzle 20 through a hose having a predetermined length, and a strong wind of a predetermined temperature is jetted from the spray nozzle 20. The If the switch operating member 30 of the switch device 27 is operated between the time points t2 and t3 to operate the gear motor GM of the link mechanism 10 to move the spray nozzle 20 at a predetermined position, The paint or the like can be dried by hot air from the nozzle. Thereafter, the same cycle, that is, heat storage for a predetermined time in the heat storage unit 6 and injection of hot air from the spray nozzle 20 are repeated alternately. When this cycle is repeated and the main switch MS is turned off at the time t8 when the drying operation is completed, the power supply to the heat storage unit 6 is stopped. At this time, it is preferable to cool the heat storage body etc. by delaying the stop of the blower 42 for a predetermined time.

  According to this control method, heat storage and spraying for a predetermined time can be alternately repeated, and hot air at a predetermined temperature can be sprayed from the spray nozzle 20. By applying the paint and then turning on the push button switch 35 of the hand switch attached to the spray nozzle 20 for a predetermined time, the paint can be dried with hot air sprayed from the spray nozzle 20. Since the switch device 27 is fixed to the spray nozzle 20, by operating the switch device 27, the blower 42 and the heater 9 are controlled to move the spray nozzle 20 to a predetermined position and at a predetermined temperature. Of hot air.

FIG. 1 is a perspective view showing a drying apparatus according to an embodiment of the present invention installed in a painting booth. 2 shows the hot air generator of FIG. 1, FIG. 2 (a) is an external perspective view of the hot air generator, FIG. 2 (b) is an exploded perspective view of FIG. 2 (a), and FIG. 2 (c) is a heater. FIG. 3A is a sectional view taken along line AA in FIG. 2A, FIG. 3B is a sectional view taken along line BB in FIG. 2A, and FIG. 3C is FIG. ) Is an enlarged view of the _XB portion. Figure 4 shows the unit of Figure 2, _{X C} direction in FIG. 4 (a) is a side view of one of the thermal storage unit as viewed from the _{X A} direction of FIG. 2 (b), FIG. 4 (b) FIGS. 4 (a) It is the side view seen. FIG. 5 shows a link mechanism, FIG. 5 (a) is a top view of the link mechanism, and FIG. 5 (b) is a side view of the link mechanism. 6 shows a link mechanism, FIG. 6 (a) is a side view showing a state where the gear motor of the link mechanism of FIG. 5 (b) is removed and the gear is exposed, and FIG. 6 (b) shows a spray nozzle in FIG. It is a side view of the state which descended from the position of a). Enlarged view of the _{X D} portion of FIG. 7 (a) Fig. 5 (a), and FIG. 7 (b) is a sectional view of line C-C in FIGS. 7 (a). Figure 8 (a) spray perspective view of the nozzle, FIG. 8 (b) is a perspective view seen through the interior as viewed from the direction of X _E in FIG. 8 (a). FIG. 9 is a cross-sectional view taken along the line DD in FIG. 10A is a cross-sectional view taken along line EE in FIG. 9, and FIG. 10B is a cross-sectional view taken along line FF in FIG. FIG. 11 is a schematic diagram showing measurement points at a location away from the spray nozzle by a predetermined distance. FIG. 12 shows the measurement results in FIG. FIG. 13 shows the switch device, FIG. 13A is an external perspective view of the switch device, and FIGS. 13B to 13D are explanatory views of the switch operation in the longitudinal sectional view of the switch device of FIG. It is explanatory drawing to do. FIG. 14 is a block diagram of control means for controlling the drying apparatus. FIG. 15 is a control chart of the control means of FIG. FIG. 16 is an explanatory diagram of a chart in which the portion A in FIG. 15 is enlarged.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drying apparatus 2 Hot-air generator 3 Container 3a Inlet 3b Outlet 6, 6a-6b Thermal storage unit 7 Storage case 7a Casing case 7b Cover plate 8 Thermal storage body 9, 9a, 9b Heating heater 10 Link mechanism 11 Parallel link mechanism 12 _1, 12 ₂ long arm ₁₂ 3, 12 ₄ connecting arms _131-134 first to fourth support shafts 14a, 14b rotate the gear 14c driven gear 15 gear member 20 spray nozzle 21 inside casing 22 outer casing 27 switch device 30 switch operation member 35 push button switch 36 diffusion member 37 rectifying member 38 control means 39 blower control unit 40 temperature control unit 41 link mechanism control unit 42 blower

Claims (18)

A blower,
A link mechanism having a drive means;
A container having an inlet and an outlet contains a heater and a heat storage member for storing heat from the heater, and the gas blown from the blower through the inlet is converted into hot air and ejected from the outlet A hot air generator to
Spraying means connected to the hot air generator for injecting hot air from the hot air generator;
Control means for controlling the blower and the heater and adjusting the temperature and air volume of hot air sprayed from the blowing means within a predetermined range;
The drying apparatus, wherein the hot air generator is arranged in the link mechanism or in the vicinity of the link mechanism, and the spraying means is attached to the link mechanism.   2. The drying apparatus according to claim 1, wherein the control means moves the spraying means attached to the link mechanism to a predetermined position by controlling the driving means.   The control unit includes a blower control unit that controls the blower, a temperature control unit that controls the heater, a link mechanism control unit that controls the drive unit, and an operation unit that operates these control units. The drying apparatus according to claim 1, wherein the operation unit is provided integrally with or near the spraying unit.   The drying apparatus according to claim 1, wherein the heat storage member is formed of a member having a plurality of ventilation paths.   The drying apparatus according to claim 4, wherein the member having the ventilation path is formed by corrugated fins each having the ventilation path between adjacent top and bottom portions.   6. The drying apparatus according to claim 5, wherein the corrugated fin is formed by corrugating a metal plate having a predetermined width and length by folding the metal plate into a small width in the length direction.   The drying apparatus according to claim 4, wherein the heat storage member is aluminum or an aluminum alloy.   The heat storage member is stored in a storage case to form a heat storage unit, a heat-resistant infrared absorbing paint is applied to at least one outer wall surface of the storage case of the heat storage unit, and the heater is applied to the wall surface to which the paint is applied. It arrange | positions, The drying apparatus as described in any one of Claims 4-6 characterized by the above-mentioned.   The drying apparatus according to claim 8, wherein a plurality of the heat storage unit units are stacked and stored in the container in a multistage manner with the heater interposed therebetween.   The heater is formed by covering a belt-shaped heating resistor having a predetermined width and length with a heat-resistant insulating member, and the flat surface of the belt-shaped heating resistor is opposed to the surface of the heat storage body of the heat storage unit or The drying apparatus according to claim 8 or 9, wherein the drying apparatus is in contact with each other.   The blowing means is formed of a first nozzle case having a space of a predetermined volume therein, a diffusion member for diffusing hot air blown from the hot air generator into the space of the first nozzle case, The drying apparatus according to claim 1, wherein a rectifying member that rectifies the hot air diffused by the diffusing member is disposed, and a first outlet for discharging the rectified hot air is provided at one end.   The spraying means is covered with a second nozzle case with a predetermined gap around the outer periphery of the first nozzle case to form a double structure, and the second nozzle case is a first outlet of the first nozzle case. The drying apparatus according to claim 11, wherein the second air outlet is provided with the gap formed earlier, and the hot air is jetted through the first and second air outlets.   The link mechanism includes a pair of first and second arms having a predetermined length and a pair of first and second connecting arms having a predetermined length for connecting between the ends of the first and second arms. One end of the stationary arm and one end of the first and second arms, with one of the first and second coupling arms as a stationary arm and the other coupling arm as a movement arm. Are pivotally supported by the first and second support shafts, and the end portions of the moving arms and the other end portions of the first and second arms are pivotally supported by the third and fourth support shafts, respectively. The driving means is provided on the stationary arm, a transmission member is suspended between the driving means and the third and fourth support shafts, and the driving member drives to drive the transmission member. The moving arm is moved by pulling one of the portions respectively coupled to the third and fourth support shafts. Drying apparatus according to claim 1.   The driving means includes a driving motor and a driving member connected to the motor, and first and second rotating members are rotatably mounted on the first and second support shafts of the connecting arm, respectively. The drive member is disposed between the first and second rotating members, and the transmission member is suspended from the driving member via the first and second rotating members. Drying equipment.   The rotating member is formed of a disk-shaped rotating gear, the driving member is formed of a disk-shaped driving gear, and the transmission member is suspended on these gears. The drying apparatus as described.   16. The drying apparatus according to claim 15, wherein the transmission member is formed of a chain that is suspended from the first and second rotating gears and the drive gear by a chain that is suspended from these gears.   17. The transmission member according to claim 16, wherein the transmission member is coupled to the first and second support shafts via an extension spring member at a portion connecting the chain and the first and second support shafts. Drying equipment.   The said 1st, 2nd arm is formed from the elongate arm longer than the said 1st, 2nd connection arm, The any one of Claims 13-17 characterized by the above-mentioned. Drying equipment.

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