JPH01174891A - Heating article transferring device of heating furnace - Google Patents

Abstract

PURPOSE:To attain the improvement of productivity by transferring heating articles supplied from an end of a heating furnace by a first conveyor to a second conveyor at other end thereof and driving the second conveyor in a reverse direction to the first conveyor. CONSTITUTION:Heaters 7, 7 are arranged at the upper and lower parts of a first conveyor 1 in a furnace body 11. A second conveyor 2 is arranged in the outside of a base stand, namely, the furnace body 11. The second conveyor 2 is placed in a vertical direction to the first conveyor 1 at a prescribed interval so that the transfer surface thereof is in nearly parallel with that of the first conveyor. The second conveyor is driven to move in a reverse direction to the first conveyor 1. A third conveyor composed of a lift conveyor is arranged at the other end side of the first conveyor 1 and the second conveyor 2. Workers have no need for going and returning between the supply mouth and the exit to take heating articles out and the improvement of productivity can be attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical field to which the invention is directed] This invention relates to a heating furnace for heating an article to be heated, such as a flow furnace used for soldering chip components of a surface mount board, or a flow furnace for soldering chip components to a board. This invention relates to improvements in curing furnaces used for fixing workpieces, and particularly relates to the transportation of heated articles.

[Prior art]

Conventionally, a heating furnace 10 such as a reflow furnace or a hardening furnace for surface mounting is configured as one device as shown in FIG.
and a heating furnace 11 fixed on this base,
A conveyor 1 is disposed so as to pass through the heating furnace in the horizontal direction, and heaters 7 are further disposed in the heating furnace 10 above and below the conveyor 1 so as to sandwich the transfer surface thereof.

A heated article 18 consisting of a printed circuit board and electronic components mounted on the board by soldering or adhesive is supplied from the supply port of the heating furnace 10 into the interior of the furnace 10 via the conveyor 1, and is further heated by the heater 7. It is discharged from the outlet.

As shown in FIG. 3 or 4, this heating furnace is constructed in a so-called in-line type in which a plurality of other devices having different functions are connected in a line.

・That is, the one shown in FIG. 3 is for soldering electronic components onto a board, and is composed of a board supply device 41, a screen printer 42, an electronic component mounting machine 43, a furnace 10a 70, and a board discharge device 44. Ru.

What is shown in FIG. 4 is a line for bonding electronic components to a board, which includes a board supply device, a dispenser 45,
It is composed of an electronic component mounting machine 43, a curing furnace 10b, and a substrate ejection device 44.

[Problems to be Solved by the Invention] In the line shown in FIG. 3 or 4, there are cases where the reflow oven 10a or the curing oven 10b is used independently from other devices at a temperature of .degree. In this case, since these heating furnaces are usually 3 to 4 meters long, workers have to walk all the way to the outlet of the heating furnace in order to take out the article to be heated, that is, the mounted board discharged from the heating furnace. The time loss caused by walking and transporting the equipment cannot be ignored.

[Purpose of the invention]

In view of these conventional problems, the present invention aims to improve productivity by taking out the heated articles without having to visit the outlet each time the heated articles are discharged from the heating furnace. That is.

[Summary of the Invention] In order to achieve the object, the present invention provides a second conveyor outside the heating furnace in addition to the first conveyor installed inside the heating furnace, and provides a second conveyor that is supplied by the first conveyor. The article to be heated, supplied from the opening, is transferred to a second conveyor at the discharge port, and this conveyor is driven in the opposite direction to the first conveyor, thereby transferring the article to be heated to the supply port side of the heating furnace. This eliminates the need for the operator to go back and forth between the supply port and the discharge port of the heating furnace in order to take out the article to be heated, thereby improving productivity.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

That is, FIG. 1 shows a device for transferring objects to be heated in a heating furnace. In this device, a first conveyor 1 is disposed inside a heating furnace 10 along its longitudinal axis, that is, a horizontal axis. This first conveyor is movably supported by guide rollers 5.5 rotatably supported at one end of the heating furnace 10, that is, the supply port side, and the other end, that is, the discharge port side. More specifically, the upper transfer surface of the guide roller 5.5 passes through the furnace body 11 along its horizontal axis, and the lower transfer surface of the heating furnace 11 passes through the furnace body 11 along its horizontal axis.
0, that is, located outside the furnace body 11. and the first
The conveyor 1 is rotated counterclockwise by the motor 6 so that the upper transfer surface of the guide roller 5.5 moves from one end of the heating furnace 10, that is, the supply port side, to the other end, that is, the discharge port side, and The transfer surface is driven to move to the other end of the heating furnace 10 or to one end $111 thereof.

Furthermore, in the furnace body 11, heaters 7, such as Pyrex heaters and infrared heaters, are placed above and below the first conveyor 1.
7 is arranged. Further, the furnace body 11 is provided with an exhaust hole 8.8 which communicates the inside thereof with the outside air.

On the other hand, the base 12 supports the furnace body 11, and the second conveyor 2 is disposed on the base, that is, outside the furnace body 11. This second conveyor includes guide rollers 15 and 15 rotatably supported at one end of the base 12, that is, the supply port side of the heating furnace IO, and the other end, that is, the discharge port side of the heating furnace 10.
It is movably stretched. More specifically, the second conveyor 2 is spaced apart from the first conveyor 1 by a predetermined distance in the vertical direction so that its conveying surface is approximately parallel to the conveying surface of the first conveyor 1. It will be arranged as follows. This second conveyor is then driven to move in the opposite direction to the first conveyor 1.

The base 12 is also provided with a temperature regulator 16 for adjusting the heater 7.7 and other necessary control equipment (not shown), as well as an adjustment handle 19 for adjusting the width of the first conveyor 1.

- In the power heating furnace 10, a third conveyor 3 constituted by a lift conveyor is disposed at the other end of the first conveyor 1 and the second conveyor 2 to which an operation panel 17 is attached. This third conveyor is arranged so that its axis in the transfer direction substantially coincides with the axis in the transfer direction of the first conveyor 1 and the second conveyor 2, and furthermore, this third conveyor is The lift 31 is movably supported between the first conveyor 1 and the second conveyor 2 by a lift 31 that is guided by a lift 31 that can be raised and lowered by a lift 12. and when the lift 31 is lowered, its transfer surface coincides with the transfer surface of the second conveyor 2, that is, the first conveyor l and the second conveyor l.
It is made to coincide selectively and almost on the same plane with the conveyor 2 of.

Further, on the other end side of the first conveyor 1, a first switch 2, such as a photoelectric switch, is provided. This switch detects the article to be heated 18 that is sent from one end of the heating furnace 10 to the other end by the first conveyor 1 and is further discharged from the other end of the heating furnace 10, that is, the discharge port, and is connected to the third conveyor 3. is driven in the same direction as the first conveyor 1 through the motor 33.

A second switch 2, such as a photoelectric switch, is provided at one end of the third conveyor 3. A third switch 23, such as a photoelectric switch, is provided on the other end side of the third conveyor 3. This switch! The article to be heated 18 sent from one end to the other end by the conveyor 3 of @3 is detected, the third conveyor 3 is stopped, and this conveyor is lowered by the lift 31.

A fourth switch 24, for example a limit switch, is provided on the base 32 of the third conveyor 3.

This switch aligns the transport surfaces of the third conveyor 3 and the second conveyor 2, which are lowered by the lift 31, and when the fifth switch 25, which will be described later, does not detect the heated article 18, the third conveyor 3 is transferred in a direction opposite to the transfer direction of the first conveyor 1. - If the fifth switch 25 detects the article to be heated, the second conveyor 2 is stopped, and at this time the fourth switch 24
The third conveyor 3 is configured not to move in the opposite direction to the first conveyor 1 even if the third conveyor 3 is operated.

Note that the second switch 22 stops the movement of the third conveyor 3 in a state in which the article to be heated 18 is transferred from the third conveyor 3 to the second conveyor 2, and drives the lift 31. Conveyor 3 is raised.

Furthermore, a fifth switch 2 is provided at one end of the second conveyor 2.
5 For example, a photoelectric switch is provided.

This switch detects the article to be heated 18 transferred from the other end to the one end by the second conveyor 2, and stops the movement of the second conveyor 2 at the time of detection.

In the above embodiment, the first conveyor 1 and the second conveyor 2 are arranged horizontally, but the transfer surface of each of the first conveyor 1 and the second conveyor 2 is They may be arranged so as to form an inclined angle. For example, the first conveyor 1 can be arranged horizontally, and one end of the second conveyor 2 can be further spaced from the first conveyor 1 than the other end.

' Also, the first conveyor 1 and the second conveyor 2 are arranged so that their respective moving surfaces have the same temperature range in the horizontal direction, and the third conveyor 3 is arranged so that the temperature range is the same in the horizontal direction.
and the second conveyor 2, the conveying surfaces of which are horizontally aligned with the conveying surfaces of the first conveyor 1 and the second conveyor 2 so as to substantially connect these conveyors to each other; , or they can be arranged substantially parallel in the vertical direction.

In the above configuration, when the operation panel 17 is operated to drive the heating furnace 10, the heater 7.7 is controlled by the temperature regulator 16.16 to maintain the inside of the furnace body 11 at an appropriate temperature. Further, the first conveyor 1 is driven by a motor 6 so that its transfer surface advances from one end of the heating furnace 10 to the other end.

At this time, the transfer surface of the third conveyor 3 is the same as that of the first conveyor 1.
The temperature corresponds to the transfer surface at ℃.

In this state, when the article to be heated 18 is placed on the first conveyor 1 from one end of the heating furnace 10, that is, from the supply port of the furnace body 11,
The article 18 to be heated passes between the heaters 7.7 while being heated by these heaters. At this time, if the heated article 18 is one in which electronic components are soldered onto an electronic circuit board, for example, the solder is melted by the heater 7.7 and connects the electronic circuit board and the electronic component. Further, if the article to be heated 18 is, for example, an electronic component bonded onto an electronic circuit board using an adhesive, the adhesive is cured by the heater 7.7.

When the heated article is discharged from the other end of the heating furnace 10, that is, the outlet of the furnace body 11, the article to be heated is detected by the first switch 21, and thereby 3 is driven by a motor 33,
It moves in the same direction as the first conveyor 1. The heated article 18 is fed into the third conveyor 3 and when it reaches the other end, the heated article 18 is detected by the third switch 23, thereby stopping the third conveyor 3. At the same time, the third conveyor is lowered by the lift 31. When the third conveyor 3 descends and its transfer surface matches the transfer surface of the second conveyor 2, the fourth switch 24 is actuated to stop the third conveyor 3 from descending. At the same time, the third conveyor 3 is driven in the opposite direction, that is, in the opposite direction to the transport direction of the first conveyor 1, whereby the article to be heated 18 is transferred onto the second conveyor 2.

At this time, if there is no other heated article at one end of the second conveyor 2, that is, if the fifth switch 25 does not detect another heated article, the second conveyor 2 is driven and the article is placed on the other end. The article to be heated 18 that has been heated is transferred by trapping one end thereof. When one end is reached, the fifth switch 25 detects the heated article 18 and stops the movement of the second conveyor 2.

On the other hand, as soon as the second switch 22 no longer detects the heated article 18 on the third conveyor 3, that is, when the heated article 18 is transferred to the second conveyor 2, the second
The third conveyor 3 is raised by the switch 221C,
It stops again with its transfer surface aligned with the transfer surface of the first conveyor 1.

The same operation is repeated below.

Note that the width of the first conveyor 1 is adjusted as appropriate using the adjustment handle 19.

〔Effect of the invention〕

In this invention, as described above, a second conveyor is disposed outside the furnace body of the heating furnace in addition to the first conveyor disposed inside the furnace body of the heating furnace, and one heating furnace is controlled by the first conveyor. The heated article supplied from one end is transferred to a second conveyor at the other end, and this conveyor is driven in the opposite direction to the first conveyor to transfer the heated article to one end side of the heating furnace. Therefore, especially when the length of the heating furnace is long, the workability is extremely improved and productivity can be improved.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view showing an embodiment of the heated article transfer device for a heating furnace according to the present invention, FIG. 2 is a vertical cross-sectional view of a conventional heating furnace, and FIGS. 3 and 4 are general surface mounting devices. It is a line block diagram. 1...First conveyor, 2...Second conveyor, 3
...Third conveyor, 5...Guide roller, 6.
...Motor, 7...Heater, 8...Exhaust hole, 1
0... Heating furnace, 11... Furnace body, 12... Base, 1
5... Guide roller, 16... Temperature regulator, 17
...Operation panel, 18...Heated article, 19...Adjustment handle, 21...First switch, 22...Second
switch, 23... third switch, 24... fourth switch, 25... fifth switch, 31...
Lift, 32...base.

Claims (13)

[Claims] (1) A first conveyor is disposed from one end to the other end in a heating furnace that heats the article to be heated, and a first conveyor is provided outside the heating furnace substantially parallel to the first conveyor. A second conveyor that moves in the opposite direction to the first conveyor is provided, and the first conveyor sends the heat from one end of the heating furnace to the other end while being heated, and further outside the heating furnace. The discharged article to be heated is transferred to the second
A device for transferring heated articles of a heating furnace, characterized in that the heated articles are transferred to one end side of the above-mentioned furnace by being transferred onto a conveyor. (2) The heated article transfer device for a heating furnace according to claim 1, wherein the heated article comprises an electronic circuit board and an electronic component soldered onto the electronic circuit board. (3) The heated article transfer device for a heating furnace according to claim 1, wherein the heated article comprises an electronic circuit board and an electronic component bonded onto the electronic circuit board. (4) The first conveyor and the second conveyor are arranged at a predetermined interval in the vertical direction so that their respective transfer surfaces are substantially parallel in the horizontal direction. Transfer device for heated articles in a heating furnace. (5) The first conveyor and the second conveyor have their respective transfer surfaces spaced apart from each other in the vertical direction, and the transfer surfaces of the first conveyor and the second conveyor have a predetermined inclination. 2. A heated article transfer device for a heating furnace according to claim 1, which is arranged so as to form a corner. (6) The heated article transfer device for a heating furnace according to claim 1, wherein the first conveyor and the second conveyor are arranged so that their respective transfer surfaces substantially coincide with each other in the horizontal direction. (7) A first conveyor is disposed in a heating furnace for heating the article to be heated from one end toward the other end, and a first conveyor is provided outside the heating furnace substantially parallel to the first conveyor. A second conveyor that moves in the opposite direction to the first conveyor is provided, and a third conveyor is provided that substantially connects the second conveyor and the other end of the first conveyor to each other. The article to be heated is sent from one end of the furnace to the other end while being heated by the first conveyor, and is further discharged outside the heating furnace. A heated article transfer device for a heating furnace, characterized in that the article is transferred onto a conveyor and transferred to one end side of the heating furnace. (8) The heated article transfer device for a heating furnace according to claim 7, wherein the heated article comprises an electronic circuit board and an electronic component soldered onto the electronic circuit board. (9) The heated article transfer device for a heating furnace according to claim 7, wherein the heated article comprises an electronic circuit board and an electronic component bonded onto the electronic circuit board. (10) The first conveyor and the second conveyor are arranged at a predetermined interval in the vertical direction so that their respective transfer surfaces are substantially parallel in the horizontal direction, and
The third conveyor is movably supported between the first conveyor and the second conveyor, and its transfer surface is selectively connected to the transfer surface of the first conveyor or the second conveyor. 8. A heated article transfer device for a heating furnace according to claim 7, comprising lift conveyors that coincide on substantially the same plane. (11) The first conveyor and the second conveyor have their respective transfer surfaces spaced apart from each other in the vertical direction, and the transfer surfaces of the first conveyor and the second conveyor have a predetermined inclination. The third conveyor is movably supported between the first conveyor and the second conveyor, and its transfer surface is connected to the first conveyor or the second conveyor. 8. The heated article transfer device for a heating furnace according to claim 7, comprising a lift conveyor that selectively coincides on substantially the same plane as the transfer surface of the second conveyor. (12) The first conveyor, the second conveyor, and the third conveyor are arranged so that their respective transfer surfaces are substantially the same in the horizontal direction, and the third conveyor between the conveyor and the second conveyor, the transfer surface thereof being horizontally aligned with the transfer surface of the first conveyor and the second conveyor so as to substantially connect these conveyors to each other. 8. A heated article transfer device for a heating furnace according to claim 7, wherein the devices are arranged to coincide with each other or to be substantially parallel in the vertical direction. (13) A first conveyor is arranged almost horizontally from one end to the other end in a heating furnace that heats the article to be heated, and a first conveyor is arranged outside the heating furnace in a direction opposite to the first conveyor. The moving second conveyor is connected so that its transfer surface is the first conveyor.
The second conveyor and the first conveyor are arranged at a predetermined distance from each other in the vertical direction so as to be substantially parallel to the transfer surface of the conveyor, and the second conveyor and the first conveyor are substantially parallel to each other at the other end thereof. A third conveyor connected to each other is arranged so that its axis in the transfer direction substantially coincides with the axis in the transfer direction of the first conveyor and the second conveyor, and The conveyor is movably supported between the first conveyor and the second conveyor, and the conveyor has a transfer surface that is selectively substantially the same as the transfer surface of the first conveyor or the second conveyor. It is constructed of lift conveyors that coincide on the surface, and a first switch for detecting the heated article is provided at the other end of the first conveyor, and a second switch is provided at one end of the third conveyor. Further, a third switch is provided at the other end of the third conveyor, a fourth switch is provided at the third conveyor, and a fifth switch is provided at one end of the second conveyor, and the third switch is provided at the other end of the third conveyor. The first switch detects the article to be heated, which is sent from one end of the heating furnace to the other end while being heated, and is further discharged outside the heating furnace, and the third conveyor is connected to the first switch. The article to be heated is transferred to the other end of the third conveyor by driving in the same direction as the conveyor, and the article to be heated transferred to the other end of the third conveyor is driven by the third switch. At the same time, the movement of the third conveyor is stopped, the third conveyor is lowered, and the fourth conveyor is detected.
A switch causes the transfer surface of the third conveyor to match the transfer surface of the second conveyor, and drives the second conveyor in a direction opposite to the transfer direction of the first conveyor, and The switch detects that the article to be heated has been transferred from the third conveyor to the second conveyor, and the fifth switch detects that the article to be heated has been transferred to one end of the second conveyor. A heated article transfer device for a heating furnace, characterized in that the heating article is detected and the driving of the second conveyor is stopped.