JPH0318046Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention automatically holds printed circuit boards without changing the distance between opposing conveyance chains if the change in the conveyance width of the printed circuit board is within a predetermined range. This invention relates to a printed circuit board conveyance device that makes it possible to

[Conventional technology]

In a carrierless soldering device, when a printed circuit board is mounted on the holding claws of a conveyance chain, the interval between opposing conveyance chains can be freely changed and adjusted depending on the width of the printed circuit board. Adjustments were made by operating a handle that varied the distance between the conveyor chains.

[Problem that the invention attempts to solve]

By the way, in the conventional carrierless soldering apparatus, the handle to be operated is heavy, so two people are required to change the distance between the conveyance chains: one to hold the board and one to operate the handle.
For this reason, in a printed circuit board conveyance device for a soldering machine that uses a high-mix, low-volume production system where the conveyance width of printed circuit boards often changes, the interval between opposing conveyance chains must be changed each time the holding width of the printed circuit board changes. Therefore, there was a problem in that mounting the printed circuit board required a lot of manpower and effort, which increased manufacturing costs.

This idea was made to solve the above problem, and if the change in the conveyance width of the printed circuit board is within a predetermined range, the printed circuit board is automatically held without changing the distance between the opposing conveyance chains. It is an object of the present invention to provide a printed circuit board conveyance device in which a conveyance chain is provided with holding claws that make it possible to do this.

[Means for solving problems]

The printed circuit board conveyance device according to this invention is
A pair of conveyor chains 17 and 18 that are endlessly provided on a plane and whose opposing parts run parallel to each other.
and a holding claw 19 that holds one end side of the printed circuit board 1 provided on one of the pair of transport chains 17 and 18;
A plurality of rotating shafts 23 are fixed to one end of a rotation shaft 23 which is provided on the other side of the printed circuit board 1 and rotates against a spring force according to the holding width of the printed circuit board 1, and press and hold the other end side of the printed circuit board 1. holding claws 20; and a plurality of holding claws provided in parallel with each other that respectively guide guide pins 32 provided at the other end of the rotating shaft 23 in order to fix and hold these holding claws within the holding width of the printed circuit board 1. It consists of two guide rails 33;

[Effect]

In this invention, one of the holding claws that presses the printed circuit board rotates against the spring force according to the holding width of the printed circuit board, so printed circuit boards of various widths can be handled without changing the distance between the opposing conveyor chains. can be held. Furthermore, the holding width of the printed circuit board is firmly held by the guide pins and guide rails.

〔Example〕

FIG. 1 is a schematic plan view of a soldering device showing an embodiment of the invention, FIG. 2 is a schematic configuration diagram of the soldering device, and FIG. 3 is a front view showing the main parts of FIG. 1. In these figures, 1 is a printed circuit board,
2 is an electronic component, 3 is a lead wire, 4 is a soldering device, 5 is a preliminary soldering device, 6 is a cutter, 7 is a final soldering device, 8 is a cleaning device, 9 and 13 are fluxers, 10 and 14 are preheaters , 11 and 15 are solder baths, 12 and 16 are coolers, 17 is a fixed-side conveyance chain, and 18 is a movable-side conveyance chain that is provided parallel to and opposite to the fixed-side conveyance chain 17. The chains 17 and 18 are also provided endlessly on a plane, and the opposing portions of the fixed conveyance chain 17 and the movable conveyance chain 18 run in parallel.
A pair of transport chains is formed. In addition, both sides of each conveyance chain 17 and 18 may be fixed or movable, or either one may be movable, in order to adjust the distance between them.

Reference numeral 19 indicates a holding claw attached to the fixed side conveyance chain 17, 20 indicates a holding claw provided on the movable side conveyance chain 18, 21 indicates a chain guide of the fixed side conveyance chain 17, and 22 indicates the movable side conveyance chain 17. Chain guide of conveyor chain 18, 2
3 is a rotating shaft, and a holding claw 20 is attached to one end side 23a thereof. 24 is a rotating device for the rotating shaft 23, the details of which are shown in FIGS. 4a and 4b. Fourth
Figure a is a sectional view taken along the - line in Figure 1, Figure 4 b
1 is a sectional view taken along the line of FIG. In these figures, 25 is a housing of the rotating device 24;
6 is a bearing of the rotating shaft 23; 27 is the rotating shaft 2;
28 is a connecting plate for integrally attaching the housing 25 to the movable conveyance chain 18; 29 is a plate integrally provided below the connecting plate 28; 30 is a plate body integrally provided below the connecting plate 28; A pin provided integrally above the connecting plate 28 constitutes a part of the movable conveyance chain 18. 31 is a compression spring installed between the housing 25 and the plate body 29;
It is compressed by the rotation of 5. Again in FIGS. 1 to 3, 32 is the other end side 23b of the rotation shaft 23.
33 indicates the entire guide rail with which the guide pin 32 is engaged and guided, and 33A, 33B, and 33C indicate individual guide rails 33. The guide rail 33 is used to suppress deformation of the printed circuit board 1 due to heat during the soldering process in the soldering baths 11 and 15, to securely hold the printed circuit board 1 in the cutter 6, and to securely hold the printed circuit board 1 in the washer 8. In order to prevent the printed circuit board 1 from moving due to the roll brush, the guide pin 32 of the rotating shaft 23 is engaged with the guide rail 33A, and is provided to prevent the holding claw 20 from rotating. 34 is the guide rail 33A, 33B,
Elongated holes 35 and 36 formed in the chain guide 22 so that the printed circuit board 33C can be attached to any desired position are a pair of guide rails that serve as guides for attaching the printed circuit board 1 to the holding claws 19 and 20.

The following operation will be explained.

First, the printed circuit board 1 is placed on the guide rails 35, 3
6, when the printed circuit board 1 is moved in the direction of arrow A, one end side 1a of the printed circuit board 1 in the running direction is engaged with a holding claw 19 running in the direction of arrow B, and then the other parts of the printed circuit board 1 are The end portion 1b engages with a holding pawl 20 running in the direction of arrow C.

Then, as shown in FIG. 5, the holding claw 20 is set to the position shown by the solid line, and the positions of the holding claws 19 and 20 are maintained. Furthermore, the printed circuit board 1 travels in the direction of arrow A, and the guide pins 32 engage with the guide rails 33A at the solder bath 11 shown in FIG. The position is retained.

Next, if the holding width of the printed circuit board 1 is W ₁ ,
As described above, when the printed circuit board 1 is placed on the guide rails 35 and 36 and travels in the direction of arrow A, one end side 1a of the printed circuit board 1 is engaged with the holding claw 19, and the other end side 1b
engages with the holding claw 20A traveling in the direction of arrow C, and the holding claw 20A engages at the position indicated by the two-dot chain line from the rear in the running direction of the printed circuit board 1, as shown in FIG. That is, since the holding claw 20A pushes the other end side 1b of the printed circuit board 1,
The compression spring 31 is pushed by rotating the rotation shaft 23 as shown in FIG. At this time, plate 2
9 is fixed with respect to the movable conveyance chain 18. When the printed circuit board 1 is transported to the solder bath 11 by the movement of the movable transport chain 18, the guide pins 32 are moved to the guide rails 11.
3B. Therefore, even if the printed circuit board 1 warps or moves, the holding claws 20A firmly press the printed circuit board 1 due to the repulsive force of the compression spring 31. is retained.

Further, the holding width _W2 of the printed circuit board 1 is also the same as above.

[Effect of idea]

As explained above, this invention consists of a pair of conveyance chains 17 and 18 that are endlessly provided on a plane and whose opposing parts run in parallel;
A holding claw 19 that holds one end side of the printed circuit board 1 provided on one of the pair of transport chains 17 and 18
is fixed to one end of a rotation shaft 23 provided on the other of the pair of conveyor chains 17 and 18 and rotates against a spring force according to the holding width of the printed circuit board 1; a plurality of holding claws 20 that press and hold the other end side; and a guide pin 32 provided at the other end of the rotating shaft 23 to fix and hold these holding claws to the holding width of the printed circuit board 1.
and a plurality of guide rails 33 provided in parallel with each other to guide the printed circuit boards, so even if the holding width of the printed circuit board changes, the printed circuit board can be automatically held without changing the interval between the opposing conveyance chains. . Since the guide pin is guided by the guide rail, the holding width is firmly held, which has the advantage that subsequent work can be performed stably.

[Brief explanation of the drawing]

Fig. 1 is a schematic plan view showing an embodiment of this invention, Fig. 2 is a schematic configuration diagram of a soldering device, and Fig. 3 is a schematic plan view showing an embodiment of this invention.
The figure is a front view showing the main part of Fig. 1, Fig. 4 a and b show details of the rotating device in Fig. 1, and Fig. 4 a
1 is a sectional view taken along the - line in FIG. 1, FIG. 4b is a sectional view taken along the - line in FIG. 1, and FIG. 5 is an explanatory view showing the operation of the holding claw. In the figure, 1 is a printed circuit board, 4 is a soldering device, 17 and 18 are conveyance chains, 19 and 20 are holding claws, 21 and 22 are chain guides, 23 is a rotating shaft, 24 is a rotating device, and 25 is a housing. body, 26 is a bearing,
27 is a fixing screw, 28 is a connecting plate, 29 is a plate body, 3
0 is a pin, 31 is a compression spring, 32 is a guide pin,
33, 33A, 33B, 33C are guide rails,
34 is a long hole.

Claims (1)

[Scope of utility model registration request] A pair of conveyor chains 17, 1 that are endlessly provided on a plane and whose opposing parts run in parallel.
8; a holding claw 19 for holding one end side of the printed circuit board 1 provided on one of the pair of transport chains 17, 18;
A plurality of rotating shafts 23 are provided on the other side of the printed circuit board 8 and are fixed to one end of a rotation shaft 23 that rotates against a spring force according to the holding width of the printed circuit board 1, and press and hold the other end side of the printed circuit board 1. holding claws 20; provided in parallel to each other to guide guide pins 32 provided at the other end of the rotating shaft 23 in order to fix and hold the holding claws 20 within the holding width of the printed circuit board 1; A printed circuit board conveyance device comprising a plurality of guide rails 33;