CN1744810A

CN1744810A - Substrate carrying apparatus

Info

Publication number: CN1744810A
Application number: CN 200410098429
Authority: CN
Inventors: 芨川敬祐
Original assignee: HIROTERU TECHNOLOGY Co Ltd
Current assignee: HIROTERU TECHNOLOGY Co Ltd
Priority date: 2004-08-30
Filing date: 2004-12-10
Publication date: 2006-03-08
Also published as: JP2006062869A

Abstract

To surely prevent the warp of a base board in carrying by generating a tensile force to the outside of the base board along a line orthogonal to the feeding direction of the base board as a component force of the torque of a roller in an inclination of a rotary shaft of the roller.This base board carrying device has a pair of roller trains 1 and 2 for sandwiching both side edges of the base board P from front and rear surfaces. The axis X of the rotary shaft of each roller 11 and 21 for constituting the roller trains 1 and 2 is inclined to the other side in the feeding direction of the base board P with respect to the line Y orthogonal to the feeding direction of the base board P.

Description

Substrate transfer apparatus

Technical field

The present invention relates at the inner substrate transfer apparatus that uses as the device of continuous mobile printing circuit board of the reflow ovens of carrying out welding job.

Background technology

In substrate transfer apparatus, come carrying substrate with the state of the lateral edge portions of supporting substrate only, then open wide as the substrate center part of various targets.Therefore, when thin substrate such as carrying printed circuit board (PCB) etc., the weight because of substrate deadweight and the installing component adorned on substrate etc. produces the concurrent non-hibernating eggs kind of substrate warp (bending) defective mode in handling process.For this reason, wish to develop the substrate transfer apparatus that can prevent substrate warp in a kind of carrying.

In the past, as the substrate transfer apparatus of substrate warp in preventing to carry, for example, known had a device of putting down in writing in the following document.

Patent documentation 1: specially permit communique No. 3306954.Put down in writing a kind of substrate transfer apparatus in patent documentation 1, this substrate transfer apparatus comprises respectively the pair of rolls row from upper and lower surface clamping substrate both sides of the edge.

The substrate transfer apparatus of patent documentation 1, at substrate warp, with the chucking power of roller row as calibrated force, so prevented the warpage of substrate in the carrying.Particularly, as shown in Figure 6, the axis X that constitutes

roller row

1,2 each

roller

11,21 rotating shaft is consistent with the line Y perpendicular to the substrate P throughput direction.

In the substrate transfer apparatus of patent documentation 1, be clamped in the warpage that the little face (line) that constitutes

roller row

1,2 each

roller

11,21 prevents substrate P owing to utilize, so a little less than the calibrated force for the substrate P warpage, exist so-called can not prevent from conscientiously to carry in the problem of substrate P warpage.

Summary of the invention

Consider the problems referred to above, the technical problem to be solved in the present invention just provide a kind of can prevent from conscientiously to carry in the substrate transfer apparatus of substrate P warpage.

In order to solve the problems of the technologies described above, the invention provides the substrate transfer apparatus of following execution mode record.

Embodiments of the present invention 1 provide a kind of substrate transfer apparatus, this substrate transfer apparatus comprises: the pair of rolls from upper and lower surface clamping substrate both sides of the edge is listed as respectively, it is characterized in that, the axis that the formation roller is listed as each roller rotating shaft is with respect to the line perpendicular to the substrate throughput direction, to substrate throughput direction lopsidedness.

In this device, because of the rotating shaft inclination of roller,,, produce the pulling force that points to the substrate outside along line perpendicular to the substrate throughput direction as the component of roller revolving force, prevent substrate warp by on the chucking power of roller, adding pulling force as calibrated force.

In addition, embodiments of the present invention 2 are on the basis of execution mode 1, and each the paired roller that clips substrate drives by synchronous counter-rotating and is coupled to each other.。

In this device, make each the paired roller that clips substrate apply the carrying capacity of equalization from the both sides up and down of substrate.

In addition, embodiments of the present invention 3 are provided with a plurality of roller row drive systems independently on the carrying direction of substrate on the basis of execution mode 1 and execution mode 2.

In this device, adjust the transporting velocity of substrate by each roller row drive system.

According to substrate transfer apparatus of the present invention, rotating shaft inclination because of roller, component as the roller revolving force, along line perpendicular to the substrate throughput direction, produce the pulling force that points to the substrate outside, therefore utilization additional pulling force and the calibrated force that produces prevents substrate warp on the chucking power of roller has the effect of substrate warp in preventing from conscientiously to carry.

In addition,,, just can not produce warpage, have the effect that to guarantee accurate carrying substrate in the both sides up and down of substrate owing to make each the paired roller that clips substrate apply the carrying capacity of equalization from the both sides up and down of substrate as embodiments of the present invention 2.

In addition, as embodiments of the present invention 3 owing to adjust the transporting velocity of substrate by each roller row drive system, therefore just have can be on the Design of length of board carrying line the effect of degree of gaining freedom.

Description of drawings

Fig. 1 is the stereogram that has schematically illustrated the basic structure of the most preferred embodiment that is used to implement substrate transfer apparatus of the present invention.

Fig. 2 is the amplification view of the critical piece of Fig. 1.

Fig. 3 is the detailed side cut away view of Fig. 1 critical piece.

Fig. 4 is the detailed front view of Fig. 1 critical piece.

Fig. 5 is the key diagram of the pulling force component that produces of the revolving force of roller.

Fig. 6 is the stereogram that has schematically illustrated the basic structure of prior art embodiment.

Label declaration:

1,2 roller row

11,21 rollers

13,22 rotating shafts

4 drive systems

The P substrate

The X axis

Y is perpendicular to the line of substrate P throughput direction

Embodiment

The most preferred embodiment that is used to implement substrate transfer apparatus of the present invention is described below with reference to Fig. 1-5.

In the present embodiment, the device that printed circuit board (PCB) is moved continuously in the reflow ovens inside of carrying out welding job of having showed suitable use.

Identical with the substrate transfer apparatus in the patent documentation 1, present embodiment comprises respectively from the pair of

rolls row

1,2 of sandwich substrate P both sides of the edge up and down.

As Fig. 2, shown in Figure 3, each roller 11 that constitutes downside roller row 1 is by preventing that the traversing ring flange of substrate P 12 from forming, and rotatably is supported on the fixed frame 3 by rotating shaft 13.Synchromesh gear 14, drive sprocket 15 coaxial being fixed on the rotating shaft 13.As shown in Figure 1 and Figure 2, with respect to the line Y perpendicular to the substrate P throughput direction, the axis X of this rotating shaft 13 is to the certain angle θ of substrate P throughput direction lopsidedness.This angle θ is set at about 2 degree.Therefore, substrate P just can not come off from roller 11 easily.

Two independently drive system 4 be connected on the downside roller row 1.Drive system 4 is hung endless chain 43 between driven wheel 41 on the motor reel that is fixed in the not shown motor that goes out and guide gear 42, and is configured among the section of the preheating Ha of reflow ovens H and main bringing-up section and the cooling section Hb (with reference to Fig. 4).Have, therefore the lower end engages of 43 of endless chains that linearity is provided with and the drive sprocket 15 of downside roller row 1 just can not be subjected to the inclination restriction of downside roller row 1 rotating shaft 13 and rotation driven roller 11 again.

Constitute each roller 21 of upside roller row 2, rotatably be supported on the fixed frame 5, do not resemble and form ring flange 12 roller 11 of downside roller row 1 by rotating shaft 22.The synchromesh gear 23 that the synchromesh gear 14 of the roller 11 of coaxial fixing and downside roller row 1 is meshed on rotating shaft 22.The axis X of this rotating shaft 22 tilts to be set at consistent with the rotating shaft 14 of the roller 11 of downside roller row 1.

Movable frame 5 constitutes the push rod 6 that constitutes by guide blot 61, helical spring 62 and is pressed on the fixed frame 3.Therefore, the

roller

11,21 of upper and lower

sides roller row

1,2 is respectively from the both sides of the edge of both sides clamping substrate P securely up and down, and

synchromesh gear

14,23 positive engagement of upper and lower

sides roller row

1,2.

According to present embodiment, by the driving of drive system 4, the roller of upper and lower

sides roller row

1,2 11,21 comes carrying substrate P with regard to counter-rotating, thereby can be at the inner moving substrate P of reflow ovens H.At this moment, because

roller

11,21 both sides of upper and lower

sides roller row

1,2 are driven by rotation synchronously, each the paired roller that therefore clips substrate applies carrying capacity to 11,21 equably in the both sides up and down of substrate P.Therefore, just can not produce distortion in the both sides up and down of substrate P, can be conscientiously carrying substrate P accurately.

When this substrate P of carrying, can be by independent driving system 4 in the section of preheating Ha and main bringing-up section and the cooling section Hb adjustment transporting velocity of reflow ovens H.Therefore, as shown in Figure 4, even the length of the transfer line among the section of preheating of reflow ovens H Ha and main bringing-up section and the cooling section Hb is identical, by slowing down the transporting velocity of substrate P in the section of preheating Ha, also can possess with conventional equipment add the substantially the same structure of heat, conventional equipment is set at the length of the transfer line of the section of preheating Ha than main bringing-up section and cooling section Hb.Thus, can freely design the carrying length of substrate P, just can make whole unit scale densification.Have again, under the section of the preheating Ha of the reflow ovens H situation different with transporting velocity among main bringing-up section and the cooling section Hb, dispose the non-free roller 4 that can rotate freely drivingly by

roller

11,21 at the intersection of the section of preheating Ha and main bringing-up section and cooling section Hb at upper and lower

sides roller row

1,2, just conveying substrate P does not reposefully carry stagnantly.

In addition, identical with the substrate transfer apparatus of patent documentation 1, for the substrate P that is handled upside down, have the chucking power of pair of

rolls row

1,2 function, the warpage of substrate P in can preventing to carry as calibrated force at the warpage of substrate P.

And, in the present embodiment, as shown in Figure 5,, just can make the revolving force a of the

roller

11,21 of upper and lower

sides roller row

1,2 form component by titling axis 13,22.That is, just can component be along the carrying capacity b of the line of substrate P throughput direction with along pulling force c line Y, that point to the substrate P outside perpendicular to the substrate P throughput direction.The clamping to substrate P of this pulling force c with regard to helping to form by the

roller

11,21 of upper and lower sides roller row 1,2.Therefore, owing to strengthened the calibrated force that prevents the substrate P warpage, the warpage of substrate P in just can preventing from conscientiously to carry.

More than, except each embodiment shown in the figure, can also dispose the drive system 4 more than 3 independently.

And, utilize gears engaged structure other structures in addition also can make the

roller

11,21 of upper and lower

sides roller row

1,2 synchronous.

Substrate transfer apparatus of the present invention except the inner mobile printing circuit board continuously of reflow ovens, can also be widely used in the various occasions that move various substrates.

Claims

1. substrate transfer apparatus, this device comprise respectively and it is characterized in that from the pair of rolls row of upper and lower surface clamping substrate both sides of the edge, constitute roller and be listed as the axis of each roller rotating shaft with respect to the alignment substrate throughput direction lopsidedness perpendicular to the substrate throughput direction.

2. according to the substrate transfer apparatus of claim 1, it is characterized in that each the paired roller that clips substrate drives by synchronous counter-rotating and is coupled to each other.

3. according to the substrate transfer apparatus of claim 1 or 2, it is characterized in that, a plurality of roller row drive systems are set on the carrying direction of substrate independently.