JPS6113159Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic soldering device, and more particularly to an automatic soldering device whose structure is simplified by conveying a carrier by a chain that runs intermittently along the entire length of the device.

In conventional drag-type automatic soldering equipment,
A device in which a carrier for a circuit board is conveyed by a chain running in the longitudinal direction of the device has been put into practical use. However, in the case where the guide rail for carrying the carrier is divided above the solder bath so that it can move up and down, the chain is not used for carrying the carrier, but instead a combination of an air cylinder and a link mechanism is used.
The carrier is transported to the next process intermittently. This has resulted in disadvantages in that the conveyance mechanism is complicated, assembly and adjustment are troublesome, and costs are high. Furthermore, in JP-A-55-86191, above the solder tank, the transport rail is cut out to form a movable rail, and the movable rail is moved up and down by means such as a cam, and the carrier is moved up and down with respect to the solder tank. In this invention, the carrier remains engaged with the conveying chain, that is, while being conveyed, descends to the solder bath and rises again, and therefore descends obliquely to the solder bath. It began to rise diagonally. For this reason, although the objective is to shorten the distance required for soldering, there is a problem in that this distance becomes relatively long.

The present invention was devised to eliminate the drawbacks of the prior art described above, and its purpose is to divide the guide rail for carrier conveyance above the solder tank and make it movable up and down, and to The purpose is to make the board immersed in the molten solder desirable and to obtain good soldering performance.Another purpose is to simplify the carrier conveyance device, facilitate assembly and adjustment, and reduce costs. There is a particular thing. Another object of the present invention is to provide a conveying means for a carrier for conveying a circuit board with conveying protrusions that are fixed to a chain at predetermined intervals and extend horizontally within a part of the movement path of the carrier, and protrude from the carrier. and a protruding part that protrudes upward from a part of the board and engages with the carrying protrusion, and the protruding part is configured to be completely detachable from the carrying protrusion during soldering. In some cases, the chain is stopped, the carrier is separated from the chain by a drive means, and the carrier is lowered into the solder bath by a vertically movable guide rail and raised from the solder bath, and the circuit board is moved in a direction perpendicular to the solder bath. The purpose is to move the soldering device up and down to complete soldering in the shortest distance.

In short, the present invention divides the guide rail for carrying circuit boards above the solder tank to form a pair of vertically movable guide rails, and vertically moves the vertically movable guide rails alternately in the left and right directions in the direction of movement of the carrier for carrying circuit boards. The circuit board is provided with a driving means for lowering the circuit board into the soldering tank and raising it from the soldering tank, and the transporting means for the circuit board transporting carrier is configured to travel intermittently along the entire longitudinal direction of the automatic soldering apparatus. conveyance protrusions that are fixed to the chain at predetermined intervals and extend horizontally into a movement path of a portion of the circuit board conveyance carrier and protrude; and the portion of the circuit board conveyance carrier. and a protruding portion that is formed to protrude upward from the top and engages with the conveying protrusion so as to be pushed forward by the conveying protrusion, and the protruding portion is configured to be completely separable from the conveying protrusion during soldering. and during soldering, the chain is stopped, the circuit board conveying carrier is separated from the chain, and is moved up and down in a direction perpendicular to the solder bath together with the up and down movable guide rail. It is characterized by

The present invention will be explained below based on embodiments shown in the drawings. In FIG. 1, an automatic soldering device 1 includes a carrier lifting device 3, a standby section 4, a flux coating device 5, a preheating device 6, a solder tank 7, and a carrier lowering device 8 arranged on a base 2. A chain 9 that intermittently runs along the entire length of the automatic soldering device 1 is provided on the side of each of these devices. The chain is provided with transport protrusions 11 for pushing and transporting the carrier 10 (FIG. 3) at equal intervals l shown in FIG. 2. Also chain 9
As shown in Figure 3, the two sprockets 1
2, 13, and the circuit shafts 14, 15 of the sprockets are located above the base 2,
As shown by arrow 16 in the figure, it rotates intermittently clockwise at a constant timing. The carrier 10 lowered by the carrier lowering device 8 is sent back to the right in the figure by the conveyor 17, and is returned to a horizontal position on the side of the chain 9 by the carrier lifting device 3.

Referring also to FIGS. 4 to 6, the chain 9 is arranged so as to run along a guide rail 18 fixed to the base 2 for transporting circuit boards.

The guide rails 18 and 19 are divided above the solder tank 7 into a pair of vertically movable guide rails 18' and 1.
It is said to be 9'. The vertically movable guide rails 18' and 19' are provided with carriers 10 for transporting circuit boards.
Move the carrier 1 up and down alternately to the left and right in the direction of travel.
0 and the circuit board 20 are lowered into the solder bath 7 and raised from the solder bath.
1, 22, rods 21a, 22 of the air cylinder
It consists of connecting members 23 and 24 fixed to the connecting members 23 and 24, and two rods 27 and 28, respectively, fixed to the connecting members and guided by bearings 25 and 26,
A left vertically movable guide rail 19' is fixed to the left rod 28 in the direction of travel, and a right vertically movable guide rail 18' is fixed to the right rod 27.

As is clear from FIGS. 4 and 6, the conveying protrusion 11 is bent into a U-shape and is fixed by sandwiching the lower and side surfaces of the chain 9, and is fitted into the groove 18 of the guide rail 18'. 'a. The tip 11a of the protrusion extends horizontally from the carrier 10 to the movement path of the upwardly projecting portion 10a, and is adapted to engage with the projecting portion and push the carrier forward. The protruding portion 10a is configured to be completely separable from the conveyance protrusion 11 of the chain 9 during soldering, and when the chain 9 is stopped and the circuit board conveyance carrier 10 is detached from the chain during soldering. , is configured to move up and down in the vertical direction with respect to the solder tank 7 together with the vertically movable guide rails 18' and 19'.

The solder tank 7 is appropriately fixed to the base 2, and the molten solder 7
A is included.

The present invention is constructed as described above, and its operation will be explained below. In FIGS. 1, 3, and 5, the chain 9 moves intermittently and the tip 11a of the protrusion 11 touches the protruding portion 1 of the carrier 10.
0a is pushed forward and conveyed along the guide rails 18, 19, and when it comes to the vertically movable guide rails 18', 19', the chain 9 stops and first, for example, as shown in FIG. 6, the cylinder 22 is activated, the rods 22a and 28 are lowered, and the guide rail 1
9' descends as shown by the phantom line, and carrier 10
and the circuit board 20 is tilted. Next, when the cylinder 21 is actuated, the rods 21a and 27 are lowered, and the guide rail 18' is lowered and stopped at the same height as the guide rail 19' that was lowered and stopped earlier.
In this case, the protruding portion 10 of the carrier 10
a completely separates from the conveying protrusion 11 of the chain 9, and therefore the carrier 10 separates from the chain 9 and descends. As a result, the carrier 10 and the circuit board 20 are placed in a horizontal state, and the lead wires 29a of the electrical components 29 inserted into the circuit board 10 are dipped from the surface of the molten solder 7a in the solder tank 7, and soldered. Ru. After a certain period of time has elapsed, first the guide rail 19' rises, then the guide rail 18' rises and returns to its original position, whereupon the chain 9 moves again by a certain distance l, and the carrier 10 moves to the carrier lowering device 8. At this point, the circuit board 20 is removed as a completed product by an operator. The same operation is repeated thereafter, and soldering is automatically performed.

Since the present invention is constructed and operates as described above, the guide rail for carrying the carrier is divided above the solder tank and made vertically movable, so that the immersion form of the circuit board in the molten solder is improved. This is desirable, provides good soldering performance, simplifies the carrier conveyance device, facilitates assembly and adjustment, and reduces costs. Further, the conveying means of the carrier for conveying circuit boards is fixed to the chain at predetermined intervals, and has conveying protrusions that extend horizontally within the movement path of a part of the carrier and protrude upwardly from the part of the carrier. The chain consists of a protruding portion that is formed protruding from the top and engages with the conveying protrusion, and the protruding portion is configured to be completely detachable from the conveying protrusion during soldering, so that the chain can be stopped during soldering. The circuit board can be moved up and down in a direction perpendicular to the solder tank by separating the carrier from the chain using the driving means, lowering it into the solder tank using the vertically movable guide rail, and raising it from the solder tank. As a result, soldering can be completed in the shortest distance.

[Brief explanation of the drawing]

The drawings relate to an embodiment of the present invention, and FIG. 1 is a schematic plan view of an automatic soldering device, FIG. 2 is an explanatory diagram showing the movement interval for each chain movement, and FIG. 3 is a schematic side view of the one shown in FIG. 1. 4 is a perspective view of the main part, FIG. 5 is a side view of the main part, and FIG. 6 is a vertical sectional view taken along the - arrow in FIG. 1 is an automatic soldering device, 7 is a soldering tank, 9 is a chain, 10 is a carrier for transporting circuit boards, 10a is a protrusion, 11 is a projection for transport, 18 and 19 are guide rails, and 18' and 19' are movable up and down. Guide rail, 20
is a circuit board, D is a driving means, and l is a conveyance interval of each chain.

Claims (1)

[Scope of utility model registration request] The circuit board transport guide rail is divided above the solder tank to form a pair of vertically movable guide rails, and the circuit board is soldered by vertically moving the vertically movable guide rails alternately in the left and right directions in the direction of movement of the circuit board transport carrier. The conveying means for the circuit board conveying carrier is a chain that intermittently runs along the entire longitudinal direction of the automatic soldering apparatus, and includes a driving means for lowering the circuit board into the soldering bath and raising it from the soldering bath. Conveying protrusions fixed at predetermined intervals and extending horizontally into a movement path of a portion of the circuit board conveying carrier and projecting therefrom; and protruding upwardly from the portion of the circuit board conveying carrier. a protruding portion that is formed and engaged with the conveying protrusion so as to be pushed forward by the conveying protrusion; the protruding portion is configured to be completely separable from the conveying protrusion during soldering; At the time of soldering, the chain is stopped, the circuit board conveying carrier is separated from the chain, and is moved up and down in a direction perpendicular to the solder bath together with the up and down movable guide rail. Automatic soldering equipment.