JPH0730568Y2 - Chain conveyor - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chain conveyor for carrying a plate-like body such as a printed circuit board and other objects to be conveyed.

[0002]

2. Description of the Related Art When manufacturing a printed circuit board, a printed circuit board made of bakelite or the like having a printed wiring on its surface is heated to about 70 ° C. by a heating device, and then a lead hole is punched in the printed circuit board by a pressing device.

In a manufacturing facility of this type, a chain in which a plurality of chains are arranged in parallel is used as a conveyor for carrying a printed circuit board into a heating device or a conveyor for taking out a heated printed circuit board from the heating device and transporting it to a pressing device. A conveyor is used.

In this chain conveyor, as shown in FIG. 17, a chain 1 is provided with a plurality of receiving plates 3 projecting laterally from the upper ends of the links 2 thereof at predetermined intervals in the chain rotating direction. A printed circuit board 5 is placed on a receiving plate 3 via a buffer body 4 and conveyed. Buffer 4
Is an integrally molded product such as silicone resin, and has a pin 8 with a retaining part 7 under the head 6, and insert the pin 8 into the mounting hole 9 of the receiving plate 3 from above. Installed.

[0005]

The conventional shock absorber 4 has a structure in which the pin portion 8 with the retaining portion 7 is provided on the lower side of the head portion 6, and since it is a dedicated portion, the manufacturing cost is low. It has the drawback of becoming expensive. Therefore, as a measure to reduce costs,
It is conceivable to use a buffer body 10 obtained by cutting a long tube of silicon or the like into a fixed length l, and insert the buffer body 10 laterally from the outside in the outer periphery of the receiving plate 3 as shown in FIG. .

However, this is because it is difficult to insert the cushion 10 into the receiving plate 3 and the receiving plate 3 because the buffer 10 is in the form of a tube having a certain length.
Since the 3 itself does not have a stopper, there is a risk that the buffer 10 will fall out on the way and fall off.

[0007] In view of the conventional problems, the present invention has an object to significantly reduce the manufacturing cost, facilitate the mounting of the cushioning body, and surely prevent the cushioning body from falling off after the mounting. And

[0008]

[Means for Solving the Problems] The present invention is designed so that it can be duplicated in the left-right direction.
It is equipped with several chains 35 , and each chain 35
A pair of left and right receiving plate 53 which projects laterally from the upper end of the pair of links 50 disposed on the left and right sides of the over down 35, provided plurality at predetermined intervals in the chain rotation direction, a plurality of Choi
Each of the receiving plates 53 is mounted on the receiving plates 53 of the cord 35.
A plate of each receiving plate 53 in a chain conveyor in which the transported object 20 is placed and transported through the attached buffer body 55.
Only on both edges in the width direction,
The engaging recesses 54 that are recessed in the center side are made to face each other in the plate width direction.
A ring-shaped cushioning body 55 is fitted over each receiving plate 53 so as to be engaged with the pair of engaging recesses 54 facing each other.

[0009]

Since the engaging recesses 54 are provided at the opposite end edges of the receiving plate 53 and the receiving plate 53 is fitted with the ring-shaped cushioning member 55 so as to engage with the engaging recesses 54, the cushioning is performed. An inexpensive O-ring or the like can be used as the body 55. Further, if an O-ring or the like is used for the buffer 55, it can be easily mounted on the receiving plate 53. Moreover, since the buffer 55 is engaged with the engaging recess 54 of the receiving plate 53, the buffer 55 does not drop off after mounting.

[0010]

Embodiments of the present invention will be described in detail below with reference to the drawings. 1 to 15 show a first embodiment of the present invention, which is applied to a printed circuit board manufacturing facility.

In FIG. 1, reference numeral 20 denotes a printed circuit board as an object to be conveyed, which has printed wiring on one side. Reference numeral 21 is a heating device that heats the printed circuit board, 22 is a supply conveyor that supplies the printed circuit board to the heating device, and 23 is a take-out conveyor that takes out the printed circuit board 20 after heating and supplies it to the next press device (not shown). .

Reference numeral 24 is a lifter on which the printed circuit board 20 is placed, and the lift is controlled so that the printed circuit board at the upper end always has a substantially constant height. Reference numeral 25 is a reversing supply device for adsorbing the printed circuit boards 20 on the lifter 24 one by one, reversing them, and supplying them to the starting end side of the supply conveyor 22. The heating device includes, in a heating chamber 26, an intermittent feed mechanism 28 that intermittently rotates around a horizontal rotation shaft 27, and two heaters 29 arranged on both lower sides of the intermittent feed mechanism 28.

As shown in FIGS. 7 to 8, the intermittent feeding mechanism 28 includes a plurality of horizontal rails 30 arranged in parallel with the outer circumference of the rotary shaft 27 in the circumferential direction, and laterally to each of the horizontal rails 30. It is composed of four fork members 31 each protruding in a radial direction at predetermined intervals, and the inlet of the heating chamber 26 by the supply conveyor 22.
The printed circuit board 20 supplied from the 32 side is received on the fork member 31 of each horizontal rail 30, and is intermittently rotated and is sent intermittently to the outlet 33 side through the upper side.

The supply conveyor 22 and the take-out conveyor 22 are both chain conveyors and have substantially the same structure. As shown in FIG. 7 to FIG. 9, the supply conveyor 22 includes four plate-shaped conveyor frames 34 arranged in parallel in the lateral direction corresponding to the four fork members 31 of the intermittent feeding mechanism 28, and each of them. Conveyor frame
It has four chains 35 arranged on one side of 34.

Each chain 35 is wound between a pair of sprockets 36 and 37 which are rotatably supported at the upper ends of the conveyor frame 34, and an intermediate sprocket 38 which is rotatably supported on the lower side of the conveyor frame 34. , Drive sprocket 39
And tension sprocket 40.

Each conveyor frame 34 is fixed on a horizontal frame 41, and a drive shaft 42 is arranged near the horizontal frame 41 so as to penetrate each conveyor frame 34. The drive shaft 42 has four drive sprockets 39, is rotatably attached to the conveyor frames 34 at both ends via bearings 43, and one end thereof is continuously connected to a drive motor 45 via a shaft coupling 44. Drive motor
45 is attached to one end of the horizontal frame 41 via a bracket 46.

A guide plate 47 is attached to the upper part of each conveyor frame 34 between the sprockets 36 and 37 at both ends thereof,
As shown in FIG. 4, the guide plate 47 has a guide rail 48 that supports and guides the transport section side of the chain 35 from below. As shown in FIGS. 2 to 4, each chain 35 pivotally connects a pair of left and right inner links 49 and outer links 50 to link pins 51 alternately, and rolls on each link pin 51.
52 is rotatably fitted to form an endless shape. Each chain 35 is provided with a receiving plate 53 on the outer link 50 at a position where they are placed one by one in the chain rotation direction.

As shown in FIG. 5, the receiving plate 53 is an outer link.
It is integrally bent and formed in an L shape so as to project laterally outward from the center of the upper end of 50. Then, each receiving plate 53 has front and rear end edges in the plate width direction that coincides with the chain rotation direction.
Only on the outer side in the plate width direction to the center side in the plate width direction
So that the engaging recesses 54 face each other in the plate width direction.
Two notches are formed at predetermined intervals,
The receiving plate 53 of the receiving plate 53 is engaged with the engaging recesses 54 facing each other.
Two ring-shaped buffer bodies 55 are fitted on the outer circumference.

The engagement recess 54 may be formed as a square notch in plan view as shown in FIG. 6A, or as a semi-circular notch as shown in FIG. 6B. It may be formed, and the notch depth is appropriately about half the thickness of the buffer 55. The buffer 55 is formed by molding a resin material having abrasion resistance such as silicon or urethane into a ring shape, and for example, an O-ring or a material close to this is used.

As shown in FIGS. 10 to 12, the reversal supply device 25 includes a rotating frame 56 which is reciprocally rotatable about the horizontal axis, and an elevating frame 57 arranged in parallel with the rotating frame 56. The lifting frame 57 includes four support arms 58 projecting above the lifter 24 laterally at predetermined intervals, and a suction pad 59 and an extrusion head 60 provided on each support arm 58. Has been done.

The rotating frame 56 is interposed between a support shaft 61 at both ends and a rotating shaft 62, and the support shaft 61 has a bracket 64 at one end of a horizontal frame 63.
The rotary shaft 62 is supported by a pair of brackets 68 at the other end of the horizontal frame 63 via a bearing 69. The elevating frame 57 is supported by the rotating frame 56 via the pair of guide rods 70 and the guide cylinder 71, and by the expansion and contraction of the cylinder 72 attached to the rotating frame 56 between the pair of guide rods 70 and the guide cylinder 71. It is configured to go up and down.

The suction pads 59 are for vacuum suction of the printed circuit board 20 on the lifter 24, and are attached to the support arms 58 one by one so as to be vertically movable, and the pressing head 60 is provided between the pair of suction pads 59. Is provided. The pressing head 60 presses the printed circuit board 20 downward with the suction pad 59 sucking the printed circuit board 20 to bend the printed circuit board 20, and the uppermost printed circuit board 20 and the lower printed circuit board 20.
Cylinder for facilitating separation from 20
It is attached to the support arm 58 so as to extend and retract by expansion and contraction of 73.

As shown in FIGS. 13 to 15, a pinion 74 is fixed between the pair of brackets 68 on the rotary shaft 62 of the rotary frame 56, and the pinion 74 is meshed with the rack 75. The rack 75 is vertically attached to a sliding plate 76, and the sliding plate 76 is vertically slidable via a slide rail 80 to a guide member 79 on the side of a connecting plate 78 that connects a pair of brackets 68. Supported by. A cylinder 82 is vertically mounted on the connecting plate 78 via a bracket 81 at the upper end.
The upper end of the piston rod 83 of 82 is connected to the bracket 84 at the upper end of the sliding plate 76 via the adjusting mechanism 85.

The adjusting mechanism 85 comprises a threaded portion 86 at the upper end of the piston rod 83, an adjusting nut 87 and a lock nut 88 which are screwed together, a holding ring 89 for holding the adjusting nut 87 to the lower side of the bracket 84, Bracket the retaining ring 89
It is composed of a bolt 90 that is detachably fixed to 84.

Next, the operation of the above configuration will be described. When punching out the lead holes of the printed circuit board 20, first, a large number of printed circuit boards 20 are placed on the lifter 24 in a stacked manner. At this time, the printed circuit board 20 is placed so that its printed wiring side is the upper surface. Next, the cylinder 72 of the reversing supply device 25 is extended to lower the elevating frame 57, and each supporting arm 58
The uppermost printed circuit board 20 is sucked by the suction pad 59 and the pressing head 60 is pressed against the printed circuit board 20 by the cylinder 73. Then, the uppermost printed circuit board 20 bends in an arc shape and is easily separated from the lower printed circuit board 20, so that two sheets are not adsorbed at the same time.

Subsequently, when the cylinder 82 is extended and the sliding plate 76 connected to the piston rod 83 thereof is raised, the pinion 74 meshed with the rack 75 rotates in the direction of arrow a in FIG. The rotation shaft 62 and the rotation frame 56 rotate together with the pinion 74, and as shown in phantom lines in FIG. 10, the printed board 20 sucked by the suction pad 59 of the support arm 58 is fed from the lifter 24 onto the feed conveyor. Supply while inverting to the starting side of 22.

At this time, if the suction pad 59 is released after the support arm 58 is rotated toward the supply conveyor 22, the printed circuit board 20 is supported from below by the suction pad 59. Support plate for each chain 35 of the supply conveyor 22
Move on to 53. Then, when the printed circuit board 20 of the supply conveyor 22 is conveyed to a position where it does not interfere with the support arm 59, the reversal supply device 25 is subsequently returned to the next printed circuit board 20.
Supply operation.

The printed circuit board 20 on the supply conveyor 22 has a printed wiring on the lower side, but a ring-shaped cushioning body 55 is fitted on the receiving plate 53 of each chain 35, as shown in FIG. Since the printed circuit board 20 is mounted on the receiving plate 53 via the buffer 55, the printed circuit board 20 is not damaged.

In this case, the buffer 55 is ring-shaped and, for example, a commercially available O-ring can be used, so that the cost itself is very low. Further, since the ring-shaped cushioning body 55 is fitted over the outer periphery of the receiving plate 53, its mounting is easier than that of the tube-shaped one. Moreover, in the mounted state, since the buffer 55 is engaged with the engaging recess 54 of the receiving plate 53, the receiving plate
There is no fear of falling out of 53.

When the printed board 20 is conveyed by the supply conveyor 22 and enters the heating chamber 26 of the heating device 21, the intermittent feeding mechanism 28 intermittently rotates by one pitch, and the printed board
The fork member 31 receives the 20 from above the supply conveyor 22 and lifts it. The intermittent feed mechanism 28 rotates intermittently every time the printed circuit boards 20 are sequentially supplied, and the printed circuit boards 20 are heated while being intermittently fed to the take-out conveyor 23 side.
Heat with 29.

The printed circuit board 20 is turned upside down while being heated and sent to the take-out conveyor 23 side, and is supported by the lower fork member 31 with the printed wiring side facing the upper surface. Then, when the fork member 31 descends from the transfer section side of the take-out conveyor 23, the printed circuit board 20
Is delivered from the fork member 31 onto the take-out conveyor 23,
After that, it is conveyed to the next press machine by the take-out conveyor 23. Therefore, in the press machine, the lead holes are punched in the printed circuit board 20 with the printed wiring on the upper side.

FIG. 16 shows a second embodiment of the present invention, which is a receiving plate 53.
Further, projecting portions 92 projecting at both ends in the chain rotation direction are provided. In the case of the receiving plate 53 with such protrusions 92, engaging recesses 54 are cut out at both end edges of each protrusion 92 that are opposed to each other in the lateral direction, and the buffer body 55 is fitted in the lateral direction. May be.

In the embodiment, the manufacturing facility for the printed circuit board 20 has been described, but the invention is not limited to this, and any chain conveyor can be used for any purpose. .

[0034]

According to the present invention, according to the present invention, a plurality of chi
Each chain 35 is provided with a chain 35,
Horizontally from the upper end of the pair of left and right links 50 arranged on both the left and right sides.
The pair of left and right receiving plates 53 protruding in the direction
A plurality of chains 35 are provided at predetermined intervals on the
Mounted on each of the receiving plates 53, straddling over a plurality of receiving plates 53
The transported object 20 is placed and transported via the buffer 55.
In the chain conveyor,
Only on both edges, from the outside in the width direction to the center side in the width direction
The engaging recesses 54 to be recessed are provided so as to face each other in the plate width direction.
Of the receiving plates so as to engage with the pair of engaging recesses 54 facing each other.
Since the ring-shaped buffer 55 is fitted over 53,
Has a remarkable effect. At both edges of the backing plate 53 in the plate width direction, face each other in the plate width direction.
The engaging recesses 54, and the pair of engaging recesses facing each other.
A ring-shaped cushioning body 55 is fitted onto the receiving plate 53 so as to engage with 54.
Therefore, the structure of the buffer 55 is simple and
The impact body 55 can be easily attached to the receiving plate 53, and the manufacturing cost
Can be significantly reduced. Each of the engagement recesses 54 is only on both edges of the receiving plate 53 in the plate width direction,
From the outside in the board width direction so that it is recessed into the center side in the board width direction
They are provided facing each other in the plate width direction, and are provided on the upper surface side of the receiving plate 53.
Since there are no engaging recesses, this pair of engaging recesses facing each other
A ring-shaped cushioning body 55 is fitted onto the receiving plate 53 so as to engage with 54.
The entire thickness of the buffer 55,
Can be projected to the side. Therefore, as the buffer 55
It is used those thin diameter or thickness, or the upper surface of the receiving plate 53
The amount of protrusion of these buffers 55 becomes large enough,
A sufficient space between the object 20 and the object 20 can be secured. The engaging recesses 54 are formed only on both edges of the receiving plate 53 in the plate width direction.
Near to recess toward the center of the plate width Direction from the outside of the width direction
Runode, by engaging the ring-shaped cushioning member 55 to the engaging recess 54
Even though it is fitted on the backing plate 53, the cushioning body 55
Even when it is fitted over the receiving plate 53 , the engaging recess 54 is
The amount of extension of the buffer 55 is smaller than that of the entire circumference of
Can be worn by combing. Therefore, the amount of extension is small
Easily with it can be attached to the receiving plate 53 even cushion 55, instrumentation After wearing
The slack of the buffer 55 can be reduced. The engaging recesses 54 are formed only on both edges of the receiving plate 53 in the plate width direction.
Plate to recess toward the center of the plate width Direction from the outside of the width direction
And provided by opposed in the width direction, the depth of the Kakarigo凹 54
The size of the depth is related to the amount of protrusion of the buffer 55 from the upper surface of the receiving plate 53.
Since it has become so as not to a large depth of each engagement recess 54
To prevent the shock absorber 55 from coming off after mounting.
You can stop. The engaging recesses 54 are provided only on both edges of the receiving plate 53 in the plate width direction.
Runode, engaging recess 54 is compared with the case in the whole circumference of the receiving plate 53
Te, deeply the engaging recess 54, against the Kakarigo凹 portion 54 of the cushion 55
Even if a sufficient amount of engagement is secured,
The cross-sectional area of the receiving plate 53 between the engaging recesses 54 of the
There is no possibility that the strength of the will decrease extremely . Therefore, loose
While securing a sufficient amount of engagement of the impact body 55 with the engagement recess 54
Also, the strength of the receiving plate 53 side can be secured, and the transported object 20
It is possible to prevent deformation and breakage of the backing plate 53 due to
Wear.

[Brief description of drawings]

FIG. 1 is a schematic view of a printed circuit board manufacturing facility showing a first embodiment of the present invention.

FIG. 2 is a plan view of a chain conveyor showing a first embodiment of the present invention.

FIG. 3 is a view taken along line XX of FIG.

FIG. 4 is a view taken along the line YY of FIG.

FIG. 5 is a perspective view of a receiving plate portion showing a first embodiment of the present invention.

FIG. 6 is a plan sectional view of a receiving plate portion showing a first embodiment of the present invention.

FIG. 7 is a plan view of the supply conveyor showing the first embodiment of the present invention.

FIG. 8 is a side view of the supply conveyor showing the first embodiment of the present invention.

9 is a view taken along the line ZZ of FIG.

FIG. 10 is a side view of the reversal supply device according to the first embodiment of the present invention.

FIG. 11 is a front view of the reversal supply device according to the first embodiment of the present invention.

FIG. 12 is a plan view of the reversal supply device according to the first embodiment of the present invention.

FIG. 13 is a plan view of a driving unit of the reversal feeding device according to the first embodiment of the present invention.

FIG. 14 is a side view of a driving unit of the reversal feeding device according to the first embodiment of the present invention.

FIG. 15 is a rear view of the driving unit of the reversal feeding device according to the first embodiment of the present invention.

FIG. 16 is a plan sectional view of a receiving plate portion showing a second embodiment of the present invention.

FIG. 17 is a sectional view of a conventional chain conveyor.

FIG. 18 is a sectional view of a chain conveyor showing another conventional example.

[Explanation of sign]

 20 Printed circuit board (object to be transported) 35 Chain 50 Link 53 Support plate 54 Engagement recess 55 Buffer body

Claims (2)

[Scope of utility model registration request] 1. A plurality of chains (35) are provided in the left-right direction.
Well, to each chain (35), on both the left and right sides of the chain (35)
Arranged right and left pair of links to the left and right pair of receiving plates which project laterally from the upper end (50) to (53), provided plurality at predetermined intervals in the chain rotation direction, a plurality of chains (35) Multiple
It is mounted on each receiving plate (53) by straddling over several receiving plates (53).
In the chain conveyor in which the transported object (20) is placed and transported through the buffer body (55), the plate of each receiving plate (53)
Only on both edges in the width direction,
Make the engaging recesses (54) recessed in the center side face each other in the plate width direction.
A chain conveyor characterized in that a ring-shaped cushioning body (55) is fitted over each receiving plate (53) so as to engage with the pair of engaging recesses (54) facing each other . 2. An O-ring having wear resistance to the buffer body (55)
Chain conveyor according to claim 1, characterized in that with.