JPH11163513A - Carrying mechanism for reflow soldering device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable smooth soldering for a printed circuit board according to a wide range of conditions, by alternatively controlling a pawl carrying chain conveyer and a mesh belt conveyer to elevate and to lower at the upper and the lower parts of a carrying path of a reflow soldering device for surface mounting parts. SOLUTION: A pawl carrying chain conveyer 1 and a mesh belt conveyer 2 are both installed on a movable frame 3 which moves up and down and drives and controls a piston cylinder such as a liquid pressure system or the like, on the movable frame 3. One of carrying pawls 6 and 7 which pass through both sides of carrying path A of the pawl carrying chain conveyer 1 is transferred and controlled in the width direction. Endless carrying chains 11 and 12 to which the carrying pawls 6 and 7 are equipped in the carrying direction at a predetermined pitch are supported by a chain supporting frame 8 of the carrying pawl 6 and a chain supporting frame of the carrying pawl 7 in the wound state around a sprocket wheel. In this manner, a carrying system can be selected according to mounting conditions on a printed circuit board A, by driving and controlling the piston cylinder mechanism 4 to elevate and lower the movable frame 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed wiring board transport mechanism in a reflow soldering apparatus for performing reflow soldering of a printed wiring board.

[0002]

2. Description of the Related Art Heretofore, reflow soldering of a printed wiring board has been performed in a process of being transported by a mesh belt conveyor means or a nail transport chain conveyor means.

[0003]

However, when the printed wiring board to be conveyed is conveyed by a mesh belt conveyor means, it is good if no mounted parts are mounted on the back side, but the mounted parts are mounted on the back side. In the case where is mounted, since the mounted product is in contact with the belt surface, the components are displaced during the transport process, which hinders the automatic reflow soldering operation. Therefore, a method in which the printed wiring board is transported by the claw transport chain conveyor means is adopted, but the method of supporting the printed wiring board by the transport claw is only on both sides of the printed wiring board,
If the printed wiring board is thin and warps due to its own weight, it interferes with the reflow soldering operation.

The present invention has been made on the basis of the above circumstances, and an object thereof is to provide, for example, a case of a printed wiring board having no mounted components on the back surface according to the situation of the printed wiring board to be transported. Is a conveyor using mesh belt conveyor means, and in the case of a printed wiring board with mounted components on the back side, select a conveyance using a claw transport chain conveyor means, and print the printed wiring board according to a wide range of conditions. An object of the present invention is to provide a transport mechanism of a reflow soldering device that is devised so that reflow soldering can be performed smoothly.

[0005]

Therefore, in the present invention,
In a reflow soldering apparatus for soldering surface mounted components to a printed wiring board conveyed through a fixed conveyance path, a claw conveyance chain conveyor means and a mesh belt conveyor means are arranged above and below the conveyance path. And a control means for alternately controlling the elevation of the conveyor means with respect to the transport path.

In this case, it is preferable that the conveyor means is mounted on a movable frame which can move up and down, and the movable frame is moved up and down by the control means. Preferably, the means is provided with a hydraulic or pneumatic piston cylinder mechanism on the fixed frame, and is configured to move up and down the movable frame by drive control of the piston cylinder mechanism.

Further, the claw transport chain conveyor means includes:
The transport claws passing on both sides of the transport path are arranged at a predetermined pitch in the transport direction, and at least one of the transport claws may be movable and adjustable in the width direction of the transport path, and the two conveyor means may be It is preferable that the electric motor provided on the movable frame is commonly driven via a transmission system.

Accordingly, in the case of a printed wiring board having no mounted components on the back surface, the mesh belt conveyor means is raised to the level of the transport path, whereby the printed wiring board is transported, and the printed wiring board having the mounted components on the back surface is provided. In the case of a board, the claw transfer chain conveyor means is lowered, thereby carrying the printed wiring board, so that the conveyance method can be selected according to the conditions of the printed wiring board, and in a preferable form, the reflow soldering in the conveyance process is performed. Work can be performed.

[0009]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view of the transport mechanism, and FIG. 2 is a side view of the transport mechanism. here,
The reflow soldering of the surface mount components is performed on the printed wiring board B conveyed through the fixed conveyance path A. The claw conveyance chain conveyor means 1 and the mesh belt conveyor means are provided above and below the conveyance path A. 2 are arranged. Further, the transport mechanism is provided with these conveyor means 1, 2
Control means (described later) for alternately raising and lowering the transport path A with respect to the transport path A is provided.

Particularly, in this embodiment, both conveyor means 1 and 2 are mounted on a movable frame 3 which can be moved up and down, and the movable frame 3 is configured to be moved up and down by the control means. . The control means includes a hydraulic or pneumatic piston cylinder mechanism 4 mounted on the fixed frame 5, and the movable frame 3 is moved up and down by drive control of the piston cylinder mechanism 4.

The claw transport chain conveyor means 1 has transport claws 6, 7 passing on both sides of the transport path A arranged at a predetermined pitch in the transport direction, and at least one of the transport claws 7 has a width of the transport path A. The direction of movement can be adjusted. For this,
In this embodiment, the chain support frame 8 for the transport claws 6 is supported and fixed to the fixed frame 5 at least at the beginning and end of the transport path A.
The chain support frame 9 for the transport claws 7 is
The guide 10 (which is located at least at the start end and the end of the transport path A) is supported so as to be movable right and left.

Endless transport chains 11, 12 having transport claws 6, 7 mounted at a predetermined pitch in the transport direction are attached to the chain support frames 8, 9, respectively, with sprocket wheels 11A, 12A.
It is supported in a state wound around A. More specifically,
Each chain support frame 8, 9 has a vertical axis 11B, 12B
, And the above-mentioned sprocket wheels are attached thereto, and a driving force for driving the endless transport chains 11, 12 is transmitted to one of the vertical shafts.

That is, the two conveyor means 1 and 2 are connected to an electric motor 13 provided on the movable frame 3 by a chain transmission system 14.
15 and, furthermore, are driven in common through the 16; in this embodiment, the claw transport chain conveyor means 1
With respect to the above, the power is transmitted to a horizontal transmission shaft 17 common to each of the chain supporting frames 8 and 9, and the power is transmitted to the above-mentioned one vertical shaft via a bevel gear mechanism or a bevel gear mechanism (not shown). A configuration for transmitting the driving force to the shaft and a configuration for transmitting the driving force to the horizontal transmission shaft 18 for driving the mesh belt conveyor means 2 are employed.

In such a configuration, the control means drives and controls the piston cylinder mechanism 4 to move the movable frame 3 up and down. The mesh belt conveyor means 2 is raised to the level of A, thereby carrying the printed wiring board A. In the case of the printed wiring board A having mounted components on the back surface, the claw transport chain conveyor means 1 is lowered. Since the printed wiring board A is transported by this, the transport method can be selected according to the mounting conditions of the printed wiring board A and the like, and the reflow soldering operation in the transporting process can be performed in a preferable manner.

[0015]

As described in detail above, the present invention relates to a reflow soldering apparatus for soldering a surface mount component to a printed wiring board conveyed through a fixed conveyance path. A claw transport chain conveyor means and a mesh belt conveyor means are arranged above and below the control means, and a control means for alternately controlling the elevation of the conveyor means with respect to the transport path is provided.

Therefore, in the case of a printed wiring board having no mounted components on the rear surface, the mesh belt conveyor means is raised to the level of the transport path, whereby the printed wiring board is transported. In the case of a board, the claw transfer chain conveyor means is lowered, thereby carrying the printed wiring board, so that the conveyance method can be selected according to the conditions of the printed wiring board, and in a preferable form, the reflow soldering in the conveyance process is performed. Work can be performed.

[Brief description of the drawings]

FIG. 1 is a partial schematic side view showing an embodiment of the present invention.

FIG. 2 is also a schematic end view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Claw transport chain conveyor means 2 Mesh belt conveyor means 3 Movable frame 4 Piston cylinder mechanism 5 Fixed frame 6, 7 Transport claw 8, 9 Chain support frame 10 Guide 11, 12 Endless transport chain 11A, 12A Sprocket wheel 11B, 12B Vertical axis 13 Electric motor 14, 15, 16 Chain transmission system 17, 18 Horizontal drive shaft

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI B65G 49/02 B65G 49/02 K

Claims (5)

[Claims] 1. A reflow soldering apparatus for soldering a surface mount component to a printed wiring board conveyed through a fixed conveyance path, wherein a claw conveyance chain conveyor means and a mesh belt conveyor are provided above and below the conveyance path. And a control means for arranging the conveyor means alternately with respect to a conveying path. 2. The reflow apparatus according to claim 1, wherein said conveyor means is mounted on a movable frame which can move up and down, and said movable frame is configured to be moved up and down by said control means. Transfer mechanism for soldering equipment. 3. The control device according to claim 2, wherein the control means includes a hydraulic or pneumatic piston cylinder mechanism mounted on the fixed frame, and the movable frame is moved up and down by drive control of the piston cylinder mechanism. The transport mechanism of the reflow soldering apparatus described in the above. 4. The claw transport chain conveyor means has transport claws passing on both sides of the transport path arranged at a predetermined pitch in the transport direction, and at least one of the transport claws is moved and adjusted in the width direction of the transport path. The transport mechanism of the reflow soldering apparatus according to claim 1, wherein the transport mechanism is capable of being performed. 5. The reflow device according to claim 1, wherein said both conveyor means are commonly driven via an electric motor provided on said movable frame via a transmission system. Transfer mechanism for soldering equipment.