JP3592516B2 - Heating equipment - Google Patents

Description

[0001]
【Technical field】
The present invention is directed to a heating device used for applications in which, for example, an adhesive or a paint is applied to the surface of a predetermined member, and then the portion is heated. And a heating device for heating the area by blowing air.
[0002]
[Prior art]
Conventionally, as this type of heating device, for example, there is one shown in FIG. The heating device shown in the figure is a pipe connection of a dome-shaped or cylindrical hood 2e and a hot air generator 4e, and the hot air generated by the hot air generator 4e is supplied into the hood 2e. It is configured to: In this heating device, a substantially constant area of the surface of the heating object 9e is blown by blowing warm air from the lower opening while the lower opening of the hood 2e faces the surface of the predetermined heating object 9e. Can be heated.
[0003]
[Problems to be solved by the invention]
However, the conventional heating device has the following disadvantages.
[0004]
That is, the conventional heating device has a configuration in which the warm air supplied to the upper end of the hood 2e is simply blown out from the lower opening having a relatively large opening area of the hood 2e. The temperature distribution of the warm air blown out from the part tends to have a large variation. For this reason, conventionally, there has been a problem that it is difficult to heat various portions of the surface of the heating object 9e to an equal temperature.
[0005]
Further, in the conventional heating device, when the dimension H of the gap 99 between the tip of the hood 2e and the surface of the object 9e to be heated is increased, the amount of warm air escaping from the gap 99 to the outside is increased, and waste is increased. Not only occurs, but also the hot air acts on a portion of the surface of the heating object 9e that does not face the hood 2e. In this case, it is not possible to limitly heat only a certain region on the surface of the heating target 9e, and there is a case where a portion other than the certain region is damaged. On the other hand, on the other hand, when the hood 2e is brought closer to the heating object 9e and the dimension H of the gap 99 is made minute, the warm air supplied into the hood 2e is discharged to the outside. Sometimes all of them pass through the minute gap 99. Therefore, in this case, the portion of the heating object 9e in the vicinity of the gap 99 is more likely to be heated to a much higher temperature than the other portions, and it is more difficult to uniformly heat the respective portions of the heating target region. was there. Needless to say, if the dimension H of the gap 99 is set to zero in the related art, there is no place for hot air to escape, and continuous hot air blowing cannot be performed continuously.
[0006]
The present invention has been conceived under such circumstances, and when heating a certain area of the surface of the object to be heated with hot air, the other area is unduly heated. It is an object of the present invention to efficiently heat the region to be heated to as uniform a temperature distribution as possible.
[0007]
DISCLOSURE OF THE INVENTION
In order to solve the above problems, the present invention employs the following technical means.
[0008]
According to the present gun invention, the heating device is provided. This heating device is provided with a hot air generator and a hood for guiding hot air having a peripheral wall portion, and a hot air generated by the hot air generator is provided at the base end of the hood. A heating device provided with a warm air introduction port for introducing air into the hood, wherein a first space portion surrounding the inside of the hood by a base end of the peripheral wall portion and a distal end portion of the peripheral wall portion A partition for partitioning into a second space having an end opening shape surrounded by the periphery, a hot air outlet for blowing hot air supplied to the hot air inlet to the second space, and the hood And a warm air outlet provided on the peripheral wall of the heating device, and in a state in which a front end opening of the second space is opposed to the surface of the object to be heated, warm air is discharged from the warm air outlet to the second space. When the wind is blown out, the second space 1 above warm air flowing into the space portion is suppressed by the partition portion, and said hot air is characterized in that through the warm air outlet there is a possible discharge structure to the outside of the second space portion Can be
[0009]
When heating the surface of a predetermined object to be heated by using the heating device according to the present invention, in a state where the second space portion of the hood is opposed to a predetermined area of the surface of the object to be heated, the hot air generator is used. The generated hot air is supplied to the hot air inlet of the hood. Then, the warm air is blown out from the warm air outlet into the second space. Since the second space opposes the surface of the object to be heated, the surface of the object to be heated is appropriately heated by the warm air blown into the second space. Further, the warm air used for heating then passes through the warm air outlet and flows out of the second space. As described above, according to the present invention, not only the surface of the object to be heated can be heated using warm air, but also the following unique effects can be obtained.
[0010]
First, in the present invention, the surface of the object to be heated is heated by the warm air blown into the second space of the hood. The second space is formed by providing a partition in the hood. When the second space portion is opposed to the surface of the object to be heated, the second space portion is a narrow space sandwiched between the surface of the object to be heated and the partition. It is possible to Therefore, when hot air is blown into the second space, the hot air flows along the surface of the object to be heated. That is, in the present invention, the flow of warm air along the surface of the object to be heated can be positively created. As a result, in the present invention, the heating efficiency of the surface of the object to be heated can be increased by increasing the chance that the hot air comes into contact with the surface of the object to be heated, and the warm air can act evenly at various points in the region to be heated. This makes it possible to heat each portion of the heating target region to a substantially uniform temperature.
[0011]
Secondly, in the present invention, even when the front end of the peripheral wall of the hood is considerably close to or in contact with the surface of the object to be heated, the hot air blown out to the second space is supplied to the hot air outlet. The hot air can be continuously supplied to the second space by flowing out of the second space through the second space. Further, since the warm air outlet is provided on the peripheral wall portion, it is possible to prevent a problem that the warm air passing through the warm air outlet heats a specific portion of the surface of the object to be heated intensively. Can be Therefore, when heating the surface of the object to be heated, the tip of the peripheral wall portion of the hood is brought into contact with or substantially close to the surface of the object to be heated. Can be enclosed. As a result, unlike the related art, it is possible to eliminate a situation in which a region other than the heating target region is unduly heated by the hot air leaking from a large gap between the hood and the surface of the heating target, and a constant heating. Only the target area can be appropriately heated. In addition, by preventing a large gap from being formed between the tip of the peripheral wall portion of the hood and the surface of the object to be heated, it is possible to eliminate waste such as a large amount of warm air escaping from the gap and increase the heating efficiency. it can.
[0012]
Third, in the present invention, an appropriate flow resistance can be generated in the hot air flowing in the second space portion by setting the number of hot air outlets and the opening area to appropriate conditions. Therefore, warm air can be more easily applied to the surface of the object to be heated, and the heating efficiency can be further increased.
[0013]
In a preferred embodiment of the present invention, a hot air return chamber communicating with the second space through the hot air outlet is provided on the outer periphery of the peripheral wall of the hood, and the hot air return chamber is provided. May be connected to the hot air generator so as to return the hot air flowing into the hot air return chamber to the hot air generator.
[0014]
According to such a configuration, the warm air blown out to the second section and used for heating the surface of the object to be heated can be returned to the warm air generator, and the warm air can be circulated and used. . Therefore, unlike the case where the used hot air is discarded, the used hot air having residual heat can be used effectively, and the energy required for generating the hot air of a predetermined temperature by the hot air generator is obtained. The amount of consumption can be reduced, and the line cost of the apparatus can be reduced. Further, a small-sized hot air heating source can be adopted, and the equipment cost can be reduced.
[0015]
In another preferred embodiment of the present invention, the first space portion is provided with a duct for guiding the warm air supplied to the warm air inlet to the warm air outlet. Can be.
[0016]
According to such a configuration, the warm air supplied to the warm air inlet of the hood passes through the duct and is directly guided to the warm air outlet. Therefore, the supply of warm air to the warm air outlet can be performed smoothly, which is advantageous for reducing the heat loss and the like of the warm air and increasing the heating efficiency.
[0017]
In another preferred embodiment of the present invention, the second space portion may be provided with a baffle plate facing the hot air outlet at an interval.
[0018]
According to such a configuration, the hot air blown out from the hot air outlet blows against the baffle plate, thereby preventing the hot air from being directly blown on the surface of the object to be heated. Therefore, there is no possibility that the portion of the surface of the object to be heated facing the hot air outlet is locally heated, and this is more preferable for uniformly heating each portion of the region to be heated.
[0019]
The features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.
[0021]
FIG. 1 is a schematic front view showing an example of the entire configuration of a heating device to which the present invention is applied. FIG. 2 is a front sectional view of a main part of the heating device shown in FIG. FIG. 3 is a sectional view taken along line III-III of FIG. FIG. 4 is a sectional view taken along line IV-IV of FIG. FIG. 5 is a front sectional view of a main part showing a state when the heating device shown in FIG. 1 is not used.
[0022]
In FIG. 1, the heating device A includes a frame-shaped fixed frame 1, a hood 2, a hot air generator 4, a jig 5, and other devices to be described later.
[0023]
The jig 5 is for positioning and supporting an object to be heated, and is mounted on a suitable table 6. As an example of the object to be heated, for example, a door trim base member 9 made of a synthetic resin and constituting a main part of a door trim as an interior member of an automobile is applied. If a door trim is manufactured by attaching a skin material (described later) made of cloth or the like to the surface of the door trim base member 9, the grade of the door trim can be enhanced by the presence of the skin material. In the case of manufacturing such a door trim, if a hot melt m for bonding a skin material is applied to the surface of the door trim base member 9, the hot melt m is then, for example, about 110 ° C. to 130 ° C. It is necessary to soften the film by heating it to exhibit tackiness. The heating device A is used for heating the hot melt m applied to the surface of the door trim base member 9. However, as will be described later, it can also be used for so-called graining work of the skin material.
[0024]
As shown in FIG. 2, the hot air generator 4 has a heater 4B connected to the air discharge side of the blower 4A, and has a pipe 40a for supplying hot air and a pipe 40b for returning hot air. Is connected. These pipes 40a and 40b are not directly connected to the hood 2 but are connected via a pipe auxiliary member 42. The pipe auxiliary member 42 is, for example, formed in a box shape as a whole, and has two connection ports 42a, 42b respectively connected to the pipes 40a, 40b at the upper part thereof. In addition, a first opening 44a for supplying hot air into the hood 2 and a return air for returning hot air from the inside of the hood 2 to the pipe 40b are provided on the lower surface of the pipe auxiliary member 42. A second opening 44b is provided. A damper 43 functioning as a hot air direction switching valve is provided in the pipe auxiliary member 42, and the first opening 44a can be opened and closed by the damper 43. The damper 43 is also capable of opening and closing a flow path 45 formed so as to connect the two connection ports 42a and 42b to each other. When the first opening 44a is opened, the flow path 45 is closed. On the other hand, when the first opening 44a is closed, the channel 45 is opened.
[0025]
The hood 2 has a configuration in which a peripheral wall portion 22 extending downward from the upper plate portion 21 is continuously provided on a lower surface portion of the substantially horizontal upper plate portion 21. In addition to this, an auxiliary peripheral wall portion is provided. 28, a partition 25, a duct 23, and a plurality of baffles 26a to 26c. Each part of the hood 2 is formed by pressing a suitable metal plate or the like, and welding, riveting, bolting, or the like is appropriately used for joining.
[0026]
The upper plate portion 21 is provided with a warm air inlet 24a and a warm air return port 24b connected to the first opening 44a and the second opening 44b of the pipe auxiliary member 42, respectively. The upper plate portion 21 is detachably attached to the elevating plate 83 via a connecting member 84 having a flange or the like. As shown in FIG. 1, the elevating plate 83 is supported by the distal ends of the rod 81 a of the reciprocating cylinder 81 and the elevating guide rods 82 supported on the ceiling of the fixed frame 1. Therefore, the hood 2 can be moved up and down by the operation of the reciprocating cylinder 81. The warm air generator 4 is also supported by the elevating plate 83 via the bracket 49, and the relative positional relationship between the warm air generator 4 and the hood 2 is independent of the elevating operation of the hood 2. It is always kept constant. Since the hood 2 is detachable from the elevating plate 83, the hood 2 can be replaced with a hood of another shape or size as needed.
[0027]
2 and 3, the peripheral wall portion 22 of the hood 2 is formed in a cylindrical shape or a dome shape by, for example, bending a thin metal plate. The peripheral wall portion 22 is formed in such a shape that its lower end tip can be fitted into a concave groove 90 formed on the surface of the door trim base member 9. In addition, the above-mentioned concave groove 90 is for embedding the skin material adhered to the door trim base member 9.
[0028]
The partition portion 25 is a portion that partitions the inside of the peripheral wall portion 22 into a first space portion S1 and a second space portion S2, and is provided at a position near the front end of the peripheral wall portion 22. The first space portion S1 is a space portion having a relatively large height surrounded by the base end side (the upper end side in the drawing) of the peripheral wall portion 22. On the other hand, the second space portion S2 is a lower opening-shaped space portion surrounded by the distal end portion of the peripheral wall portion 22, and the height dimension L is formed to be considerably smaller than that of the first space portion S1. ing.
[0029]
The duct 23 is provided in the first space S1, and includes one base pipe 23 ′ and a plurality of flared nozzles 23a to 23c that branch off from the base pipe 23 ′ and extend downward. Is provided. The base tube portion 23 'is a tubular member extending in the horizontal direction, and the inside thereof communicates with the warm air inlet 24a, and the warm air supplied to the warm air inlet 24a is introduced into the nozzle portions 23a to 23c. Guideable. At the tips of the plurality of nozzles 23a to 23c, downwardly opening hot air outlets 23a 'to 23c' for blowing out the hot air downward from above in the second space S2. Is formed. Of course, the partition part 25 is provided with a plurality of through holes for avoiding interference with the nozzle parts 23a to 23c.
[0030]
The plurality of baffle plates 26a to 26c are provided in the second space portion S2, and the hot air outlets 23a are arranged so as to face the hot air outlets 23a 'to 23c' at an appropriate interval. It is arranged immediately below '~ 23c'. The shape and size of these baffle plates 26a to 26c in plan view are substantially the same as, for example, the opening shapes and sizes of the hot air outlets 23a 'to 23c'. These baffle plates 26a to 26c are attached to, for example, the tips of the nozzles 23a to 23c or the bottom of the partition 25 via a narrow stay (not shown).
[0031]
The auxiliary peripheral wall portion 28 is formed in a tubular shape surrounding an outer peripheral surface region excluding a distal end portion of the peripheral wall portion 22. Thus, a warm air return chamber 27 is formed between the auxiliary peripheral wall portion 28 and the peripheral wall portion 22. A part of the upper part of the warm air return chamber 27 is connected to the pipe 40b of the warm air generator 4 via the warm air return port 24b and the second opening 44b. On the other hand, a portion corresponding to the peripheral wall of the second space chamber S2 in the vicinity of the distal end of the peripheral wall portion 22 includes a plurality of hot air flows that allow the second space chamber S2 and the hot air return chamber 27 to communicate with each other. An outlet 29 is provided.
[0032]
Next, a usage example and an operation of the above-described heating device A will be described.
[0033]
First, as shown in FIG. 1, after setting the door trim base member 9 with the hot melt m applied on the surface thereof on the jig 5, the hood 2 is lowered onto the door trim base member 9a. However, at this time, although the hot air generator 4 is driven in advance, the blowing of the hot air from the hood 2 is stopped. As shown in FIG. 5, if the first opening 44 a of the pipe auxiliary member 42 is closed by the damper 43, the warm air supplied from the warm air generator 4 is not introduced into the hood 2, The blowing of warm air from 2 can be stopped. In this case, the hot air that has flowed into the pipe auxiliary member 42 is returned to the hot air generator 4 via the flow path 45, the connection port 42b, and the pipe 40b. Therefore, in the heating device A, the warm air is always generated by the warm air generator 4 and circulated through a series of loop-shaped paths formed by the pipe 40a, the pipe auxiliary member 42, and the pipe 40b. Can be.
[0034]
Next, as shown in FIGS. 2 and 3, when the hood 2 is lowered so that the distal end of the peripheral wall portion 22 of the hood 2 comes into contact with the surface of the door trim base member 9 or approaches with a small gap left therebetween. Then, the descending operation is stopped. Thereby, the entire area of the hot melt m applied to the surface of the door trim base member 9 can be appropriately masked by the front end portion of the peripheral wall portion 22 of the hood 2 and the partition portion 25. The hot melt m is applied to substantially the entire inner region of the annular groove 90.
[0035]
In such a masking state, the operation of blowing hot air from the hood 2 is started. As shown in FIG. 2, the blowing operation of the hot air is performed by operating the damper 43 to open the first opening 44 a and at the same time shut off the flow path 45 in the pipe auxiliary member 42. As a result, the warm air supplied into the pipe auxiliary member 42 immediately flows into the duct 23 of the hood 2 through the warm air inlet 24a, and the warm air is discharged from each of the plurality of warm air outlets 23a 'to 23c'. It is blown out into the second space S2. Therefore, the hot air can be applied to the application area of the hot melt m very quickly, and the heating operation of the hot melt m can be started early. If the warm air is blown into the second space S2 through the duct 23, the warm air supplied to the hood 2 passes through the entire first space S1 having a large volume. As a result, it is possible to prevent the air from being blown out to the second space S2, and it is possible to reduce the heat loss of the warm air to reach the inside of the second space S2.
[0036]
The warm air blown into the second space portion S2 from the plurality of warm air outlets 23a 'to 23c' once strikes the baffle plates 26a to 26c and then flows so as to be dispersed to the side. Therefore, hot air is not intensively blown to the portion of the surface of the hot melt m that faces the plurality of hot air outlets 23a 'to 23c', and that portion is considerably more than other portions. Heating to a high temperature can be prevented. The warm air flowing to the side of the baffles 26a to 26c thereafter flows toward the outer periphery of the second space S2 along the surface of the hot melt m. That is, since the height L of the second space portion S2 whose upper portion is partitioned by the partition portion 25 is relatively small, the warm air blown into the second space portion S2 is exposed to the lower surface of the partition portion 25. The portion is guided to flow along the surface of the hot melt m. Therefore, the chance that the hot air comes into contact with the large area of the surface of the hot melt m increases, and as a result, the heating efficiency of the hot melt m increases. Further, it is possible to prevent a large variation in the heating temperature at various points of the hot melt m.
[0037]
The warm air blown out to the second space S2 is finally discharged to the outside of the second space S2 through the plurality of warm air outlets 29. Therefore, despite the fact that the distal end of the peripheral wall portion 22 of the hood 2 is set to have no gap between itself and the surface of the door trim base member 9 or the gap is set to be small, the second space portion is formed. There is no trouble in escaping the escape of the warm air blown into S2, and the continuous supply of warm air into the second space S2 can be continued for a desired time. Also, if there is no gap between the tip of the peripheral wall portion 22 of the hood 2 and the surface of the door trim base member 9 or if the gap is very small, a large amount of warm air passes through the gap and the hot melt There is no heat damage to the parts where the is not applied.
[0038]
The hot air that has passed through the plurality of hot air outlets 29 flows into the hot air return chamber 27, and is then returned to the hot air generator 4 via the pipe 40b. Therefore, in the heating device S, the used hot air having residual heat can be repeatedly used, and the energy efficiency can be improved. The amount of warm air supplied to the second space S2 of the hood 2 basically depends on the ability to blow warm air from the warm air generator 4, but the total amount of warm air outlets 23a 'to 23c' is different. And the total opening area of the plurality of hot air outlets 29. That is, if the total opening area of the warm air outlet 29 is smaller than the total opening area of the warm air outlets 23a 'to 23c', flow resistance can be generated in the warm air in the second space S2. . Therefore, the degree of contact of the hot air with the surface of the hot melt m can be further increased by this resistance, and the heating efficiency can be further increased.
[0039]
When the hot melt m is heated to a desired temperature by the above series of operations, the damper 43 is switched to the state shown in FIG. 5 at that time to stop blowing hot air, and then the hood 2 is returned to the original state. What is necessary is just to raise and return to a position. According to the above-mentioned heating operation, each portion of the application area of the hot melt m can be heated and softened almost uniformly at a temperature of, for example, 110 ° C. to 130 ° C., and the entire surface of the hot melt m has sufficient adhesiveness. Can be provided. Therefore, when a skin material such as a cloth is bonded to the surface of the door trim base member 9 thereafter, for example, the skin material can be bonded appropriately and firmly via the hot melt m.
[0040]
As shown in FIG. 6, the heating device A can be used for wood graining of the skin material 95 bonded to the surface of the door trim base member 9 via the hot melt m. That is, in a state where the door trim base member 9 is set on the jig 5, the hood 2 from which the blowing of hot air is stopped is lowered, and the skin material 95 is pressed downward by the tip of the peripheral wall portion 22 of the hood 2. . Since the distal end of the peripheral wall portion 22 has a shape corresponding to the concave groove 90 on the surface of the door trim base member 9, the outer peripheral edge of the skin material 95 is appropriately grained into the concave groove 90 by the distal end portion of the peripheral wall portion 22. The outer periphery of the skin material 95 can be treated with good appearance. As described above, if the heating device A can also be used for the wood graining work, it is not necessary to separately prepare the heating device and the wood graining device when manufacturing a door trim, for example, and the overall equipment cost can be reduced. .
[0041]
In the above embodiment, the case where the hot melt applied to the surface of the door trim base member is heated is described as an example, but the present invention is not limited to this. The present invention can be used not only for heating adhesives and paints other than hot melt but also for heating other various articles and members, and the specific uses are not limited.
[0042]
The specific configuration of each part of the heating device according to the present invention is not limited to the above-described embodiment, and various design changes can be made. For example, without using a duct as a means for guiding the warm air into the second space, the warm air supplied to the warm air inlet is allowed to flow into the first space so as to fill the first space, and the warm air flows into the partition. A wind outlet may be provided so that the warm air flowing into the first space portion passes through the warm air outlet provided in the partition portion and is blown out to the second space portion. Further, in the present invention, a configuration in which hot air is not circulated may be used. Therefore, for example, the used hot air that has passed through the hot air outlet from the second space may be directly discharged into the atmosphere. Further, in the present invention, the specific numbers of the hot air outlet, the hot air inlet, and the hot air outlet are not particularly limited. In short, at least one or more of them may be provided.
[Brief description of the drawings]
FIG. 1 is a schematic front view showing an example of the overall configuration of a heating device to which the present invention is applied.
FIG. 2 is a front sectional view of a main part of the heating device shown in FIG.
FIG. 3 is a sectional view taken along line III-III of FIG. 2;
FIG. 4 is a sectional view taken along line IV-IV of FIG. 2;
FIG. 5 is a front sectional view of a main part showing a state when the heating device shown in FIG. 1 is not used.
FIG. 6 is a front sectional view of a main part showing an example of a case where the heating device shown in FIG. 1 is used for another purpose.
FIG. 7 is an explanatory diagram showing an example of a conventional heating device.
[Explanation of symbols]
2 Hood 4 Hot air generator 9 Base member 22 Peripheral wall 23 Duct 23a 'to 23c' Hot air outlet 24a Hot air inlet 25 Partition 26a to 26c Baffle plate 27 Hot air return chamber 28 Auxiliary peripheral wall 29 Hot air outlet 40a, 40b Piping 95 Skin material A Heating device m Hot melt S1 First space S2 Second space

Claims (4)

A hot air generator and a hood for guiding hot air having a peripheral wall portion are provided, and a base end of the hood is provided for introducing hot air generated by the hot air generator into the hood. A heating device provided with a hot air inlet,
A partition that divides the interior of the hood into a first space surrounded by a base end of the peripheral wall and a second space that is open at the end and surrounded by a distal end of the peripheral wall. When,
A warm air outlet for blowing the warm air supplied to the warm air inlet into the second space,
A warm air outlet provided on a peripheral wall portion of the hood ,
When hot air is blown out of the hot air outlet into the second space in a state where the tip opening of the second space faces the surface of the object to be heated, the first space is blown out of the second space. Wherein the inflow of the warm air to the section is suppressed by the partition, and the warm air is configured to be able to be discharged to the outside of the second space through the warm air outlet . Heating equipment. A warm air return chamber communicating with the second space through the warm air outlet is provided on an outer periphery of the peripheral wall of the hood, and the warm air return chamber flows into the warm air return chamber. The heating device according to claim 1, wherein the heating device is connected to the hot air generator so as to return the generated hot air to the hot air generator. 3. The heating device according to claim 1, wherein a duct for guiding the hot air supplied to the hot air inlet to the hot air outlet is provided in the first space. 4. The heating device according to claim 1, wherein a baffle plate facing the hot air outlet at an interval is provided in the second space portion. 5.

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