JPH03293215A - Carrying structure for inline type constant temperature bath - Google Patents

Abstract

PURPOSE:To make miniaturization and save a space by rotatably supporting a drum- like supporting member between the inlet and outlet of a constant temperature bath, and insertedly retaining part of mounting substrates in a groove formed on the outer peripheral surface of a supporting member to be rotated and carried between the inlet and outlet of the constant temperature bath in a carrying structure for an inline type constant temperature bath for electronic parts mounting substrates. CONSTITUTION:A parts mounting substrate 8 carried to the inlet 10a of a constant temperature bath 10 is passed tot he carrying belt 17a in the constant temperature bath 10. Next the parts mounting substrate 8 is sent to a drum-like carrying path 11, and its one end is inserted in the substrate insertion groove 14 of a drum-like supporting member 12, temporarily stopped at a horizontal position, from the belt 17a. Then the resuming of the rotation of the drum-like supporting member 12 causes the rotation of the substrate 8 too in an arrow A direction. In the same way, the substrate 8 is received in the groove 14 in order to be moved successively, and is turned over to a belt 17b on an outlet side to be carried out. This constitution permits miniaturization and space-saving.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a component mounting board formed by mounting a large number of electronic components. The present invention relates to a transport structure for a component mounting board to be transported.

[Conventional technology]

FIG. 3 is a schematic side view showing the conveyance structure of a conventional in-line constant temperature oven.

In the figure, reference numeral 1 denotes a constant temperature bath that maintains the interior at a certain temperature, and a horizontal conveyor 2 is provided at the bottom. This conveyor 2 is connected to the thermostat 1111.
It consists of an endless conveyor belt I-4 stretched between pulleys 3a and 3b installed at
It extends linearly from the outlet 1b to the outlet 1b. Then, by rotating the pulleys 3a and 3b by a motor (not shown) or the like, the transport heald 4 is directed from the entrance 1a to the exit 1b.
and rotating it.

Reference numeral 5 indicates a plurality of hot air outlets provided in the second part of the thermostatic oven 1, and 6 indicates a hot air circulation fan for circulating the warm air blown from the hot air outlet 5 into the thermostatic oven 1. .

Further, 7 is a hot air suction port that sucks the hot air blown out from the hot air blowing port 5. The hot air blown out from the hot air outlet 5 is sent to the constant temperature oven 1 by the hot air circulation fan 6.
The temperature inside the thermostatic chamber 1 is maintained at a certain constant temperature by circulating the warm air inside the thermostatic chamber 1 and sucking it in from the hot air suction lower.

A component mounting board 8 is placed on the conveyor 2 and conveyed within the thermostatic chamber 1, on which a large number of electronic components 4 are mounted.

Reference numeral 10 denotes an external conveyor provided outside the thermostatic oven 1, which is disposed so as to extend from the conveyor 2 inside the thermostatic oven 1, and is generally conveyed to the inlet 1a of the thermostatic oven 1. The component mounting board 8 coming out from the outlet 1b is received and transported to the next process.

The thermostatic oven 1 is used when mounting the electronic components 9 on the component mounting board 8. By passing through the thermostatic oven 1 while being conveyed by the conveyor 2, the electronic components 9 are heated for a certain period of time. Therefore, the conveyor 2 is set in accordance with the length calculated to keep the component mounting board 8 in the thermostatic chamber 1 for a certain period of time.

In this way, conventionally, a conveyor 2 is placed in a constant temperature chamber 1 with a predetermined length.
was extended horizontally, and the component mounting board 8 was flowed over the oven controller 2 to ensure a certain heating time for the electronic components 9.

[Problem to be solved by the invention]

However, according to the above-mentioned conventional technology, in order to ensure a certain heating time for the component-mounted board, a long conveyor is inevitably required, resulting in a problem that the entire length of the thermostatic chamber becomes long. As the length of the thermostatic chamber becomes longer, a problem arises in that a long space must be secured for installing the chamber.

The present invention has been made to solve the above-mentioned problems, and it is possible to downsize the thermostatic oven by ensuring a constant heating time for the component mounting board in the thermostatic oven without increasing the length of the conveyor. The purpose is to save space within the factory.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention receives a component-mounted board conveyed by an external conveyor into a constant temperature oven maintained at a certain temperature from the entrance, and then heats the component-mounted board for a certain period of time by heating the component-mounted board inside the thermostat. In the conveyance structure of an in-line constant temperature chamber, which is conveyed inside the constant temperature chamber by a conveyance path and then conveyed from the outlet to an external conveyor, the radial circumferential surface of a drum-shaped support member that is rotatable with a shaft passing through the center as a fulcrum. Board insertion grooves into which one end of the component mounting board can be inserted are provided at equal intervals, and the board insertion grooves are arranged in the middle of the conveyance path in the thermostatic oven so as to face the entrance and exit of the thermostatic oven. A part of the conveyance path inside the constant temperature bath is made into a drum-shaped conveyance path.

[For production]

According to the above-described configuration, the component mounting board conveyed by the external conveyor is received by the conveyance path inside the thermostatic oven at the entrance and conveyed to the drum-shaped conveyance path.

The rotating drum-shaped conveyance path temporarily stops when one of the plurality of board insertion grooves provided on its circumferential surface is parallel to the internal conveyance path, so the component mounting board is inserted into this board insertion groove. It enters the groove due to the conveying force of the entrance side conveying path.

As a result, the component mounting board is supported by the drum-shaped conveyance path.
As it rotates, it is conveyed in an arc shape.

Then, at a position halfway around, it is placed on the general feed path within the thermostatic chamber extending to the outlet. This ensures a constant heating time for the component mounting board.

Thereafter, the component mounting board is removed from the drum-shaped conveyance path by the conveyance force of the first general conveyance path on the exit side, conveyed to the exit of the thermostatic oven, and sent to an external conveyor.

〔Example〕

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

FIG. 1 is a side view of an in-line constant temperature oven showing one embodiment of the present invention, and FIG. 2 is a perspective view of the main parts of this embodiment. In addition,
Components that are substantially the same as those in the past are designated by the same reference numerals as in the past.

In FIGS. 1 and 2, reference numeral 10 denotes a constant temperature oven for heating a plurality of component mounting boards 8 for a certain period of time, and is surrounded by a housing to maintain the interior at a predetermined temperature.

10a is an inlet of this constant temperature bath 10, and 10b is an outlet.

In the 1-ram-shaped general feed path provided in the thermostatic chamber 10, two ram-shaped supports 12 are arranged facing each other with a width corresponding to the width of the component mounting board 8. A shaft 13 is connected to the center of the shirt 1-13, and the shirt 1-13 is used as a fulcrum to rotate in the direction of arrow A in the figure. and,
Board insertion grooves 14 are formed radially at equal intervals on the outer peripheral edge of the drum-shaped support member 12, and the end portion of the component mounting board 8 transferred from the outside of the thermostatic oven 10 is inserted into the board insertion grooves 14. Each time the component mounting board 8 is inserted, the component mounting board 8 is attached around the drum-shaped support member 12.

Reference numeral 15 denotes a board protrusion prevention metal fitting provided on the outside surface of the tram-shaped support member 12 so as to close the outside surface of the board insertion groove 14.

Reference numeral 16 denotes a pair of side plates that support the above-mentioned I/ram-shaped 1 general conveyance path 11 via the shirts 1 to 13, and these side plates 16 are opposed in parallel with the tram-shaped 1 general conveyance path 11 interposed therebetween. The inlet 1.0a and the outlet 10 of the thermostatic chamber 10 are arranged in the front and back direction from the drum-shaped conveyance path 11, respectively.
It extends as b-\.

17a and 17b The conveyor wheels 1 to 1 of the conveyor for conveying the component mounting boards 8, which are respectively provided inside the side plates 16 of the cigarette, are rotated by a drive source (not shown) from the entrance 10a toward the exit 10b, and the components are The mounted substrate 8 is generally transported from the outside of the thermostatic chamber 10 to the drum-shaped transport path 11, and from the drum-shaped transport path 11 to the outlet 10b.

Reference numeral 18 denotes a bearing fitting that supports the shaft 13 on the side plate 16.

Reference numeral 19 denotes a motor connected to one end of the shaft 13, which serves as a driving means for rotationally driving the drum-like conveyor &811, and serves as a driving means for rotationally driving the drum-shaped conveyor &811. It rotates by the same angle as the angle, stops for a certain period of time, rotates again by the same angle, and repeats the -time stop. The position at which it stops at this time is accurately set, that is, the empty board insertion groove 14 in which the component mounting board 8 is not inserted is a position that is parallel to the first general feeder 117a, 17b.

Reference numeral 20 denotes a warm air outlet provided on the F side of the outlet 10b in order to maintain the temperature inside the thermostatic chamber 10 at a certain constant temperature, 21
22 is an inlet for spreading the warm air blown from the warm air blower I' 20 into the thermostatic chamber 10; These are air intake ports, and are provided on three sides of the exit 10b.

With the above-described configuration, the component mounting board 8 is subjected to heat treatment for a certain period of time, and then heated to the thermostatic chamber 10 by a conveyor (not shown) or the like.
The component mounting board 8 transported to the entrance 10a is transported into the thermostatic chamber 10 at this entrance 10a.
It was received by a, and this transportation help l-178 sent it to Tsune/2.
]! tram-shaped) ship road] 1 inside the tank 10.

In order to insert the component mounting board 8, one of the substrate insertion grooves 14 formed in the drum-shaped support part A12 is connected to the conveyor bell 17a (and 17b). When the board becomes horizontal, it is temporarily stopped, so the component mounting board 8 transported by the transport heald 17a J- is moved into the board insertion groove 14 of the tram-shaped general transport path j1 by the transport force of the transport heald 7a. One end of it goes inside.

When a predetermined stopping time has elapsed, the motor 19 is driven by a control unit (not shown), and the L-ram-shaped conveyance path 11 is moved at a predetermined angle, that is, at a distance corresponding to the interval at which the substrate insertion grooves 14 are formed, via the shaft 13. As shown in the figure, eight board insertion grooves 14 are formed at equal intervals, so the angle between each board insertion groove 14 is 45°, and in the example shown, it is 45°. is rotated.

As a result of this rotation, the component mounting board 8 whose end portion has been inserted into the board insertion groove 14 is lifted and transported in two directions as the drum-shaped transport path 11 rotates, as shown in the figure.

Then, when it is rotated by 45 degrees, the 1-' ram-shaped general feed path 11ba0 pauses again, and the next component-mounted board 8 enters the empty board insertion groove 14, which is parallel to the conveyor belt 17a. Wait for it to come.

In this manner, the component mounting board 8 is rotated by a predetermined angle and repeatedly paused for a certain period of time, thereby supporting and transporting the component mounting board 8 one by one in each board insertion groove 14.

When the board insertion groove 14 is rotated 180 degrees from the inserted position, the first general transport channel I-
Transport heald 17b provided on the extension line of 17a
Reach l-. At this point, the rotation of the drum-shaped conveyance path 11 is temporarily stopped, so the component mounting board 8 supported by the drum-shaped conveyance path 11 is placed on the conveyor belt (extending to the output D] LTb). be placed.

The conveyor belt 17b is the conveyor belt f1 on the entrance 10a side.
Since it is driven in synchronization with 7a, the transport bell) 17b
The component mounting board 8 placed on the conveyor bell l-1'7
The substrate is pulled out from the substrate insertion groove 14 by the conveyance force b, and is conveyed to the exit 10b on the first general conveyor l-17b.

■ As a result, the component mounting board 8 is rotated 180 degrees from the point where it is supported on the drum-shaped conveyance path 11, and the conveyance bell l on the opposite side is rotated.
-17b J: While being passed to the thermostat 10, it is heated for a certain period of time. Therefore, the length of the semicircular portion of the drum-shaped conveyance path 11 is set corresponding to the length calculated to allow the component mounting board 8 to exist in the thermostatic chamber 10 for a certain period of time. 11 makes half a turn around the thermostatic chamber 10, thereby heating the component mounting board 8 for a certain period of time.

In addition, in the above-mentioned embodiment, the drum-shaped conveyance path 11 is
The structure is such that two drum-shaped supporting members 12 are arranged opposite to each other across the width of the component mounting board 8. For example, the component mounting board 8
It is also conceivable to use a cylindrical member having a thickness equivalent to the width of the cylindrical member, and to form grooves for supporting the component mounting board 8 in the circumferential surface of the cylindrical member in parallel with the axial direction.

In addition, although the number of board insertion grooves 14 is eight, it is needless to say that the number is not limited to eight. It may be more than 8 places or less than 8 places.

〔Effect of the invention〕

As described above, according to the present invention, a board insertion groove into which one end of a component mounting board can be inserted is provided on the radial circumferential surface of a drum-shaped support member which is rotatable about a shaft passing through the center as a fulcrum. By placing the substrate insertion grooves in the middle of the transport path in the thermostatic oven so that they face the inlet and the outlet of the thermostatic oven, the - section of the transport path in the thermostatic oven is divided into 1:
Since we decided to use a single drum-shaped general conveyance path, the component-mounted board is supported by the outer periphery of this drum-shaped conveyance path and is conveyed in an arc shape inside the thermostatic oven. is ensured.

Therefore, the conveyance path within the thermostatic chamber can be maintained at a predetermined length without extending in the horizontal direction.

Therefore, compared to the conventional horizontal arrangement,
Since there is no need to secure a long horizontal conveyance path, the length of the entire thermostatic chamber can be shortened, and miniaturization becomes possible. This eliminates the need for a long space in which to install a thermostatic oven, making it possible to install it in a narrow space, and saving space within the factory.

[Brief explanation of drawings]

Part 1 is a side view of an in-line thermostatic oven showing one embodiment of the present invention, Fig. 2 is a perspective view of essential parts of this embodiment, and Fig. 3 is a schematic side view showing the conveyance structure of a conventional in-line thermostatic oven. It is a diagram. 8... Component mounting board 10... Constant temperature chamber 10a
...Entrance 10b...Exit 11...
Drum-shaped conveyance path 12...Drum-shaped support member 13...Shaft 14
... Board insertion groove 15 ... Board protrusion prevention fitting 16 ... Side plate 17 ... Transport heald 2
0... Warm air outlet 21... Warm air circulation fan 21... Warm air intake port

Claims (1)

[Claims] 1. A component-mounted board transported by an external conveyor is received from the entrance into a constant temperature oven maintained at a certain temperature, and after being transported inside the thermostat by an internal conveyance path to heat the component-mounted board for a certain period of time, it is placed at the exit. In the conveyance structure of an in-line constant temperature chamber that is conveyed from the body to an external conveyor, one end of the component mounting board can be inserted into the radial circumferential surface of a drum-shaped support member that is rotatable with a shaft passing through the center as a fulcrum. By providing substrate insertion grooves at equal intervals and arranging the substrate insertion grooves in the middle of the conveyance path inside the thermostatic oven so as to face the entrance and exit of the thermostatic oven, a part of the conveyance path inside the thermostatic oven can be used as a drum. A conveyance structure for an in-line constant temperature chamber characterized by a shaped conveyance path.