JP2697027B2 - Screw tightening method - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw supply for tightening screws, and more particularly to a screw supply method using a tape and a device therefor.

2. Description of the Related Art As products have become lighter, thinner and smaller, the screws used to fasten these products have become smaller and more precise, and a highly reliable screw supply method that can handle any of these situations has been required. I have. In response to this requirement, there is a highly reliable taping supply method for screws as a method for supplying screws for performing an automatic fastening operation. Generally, it is not a screw, but the taping supply method of electronic parts is as follows: (1) Chip type electronic parts are stored in embossed tape,
(2) Taping electronic components with leads onto radial tape, cutting the leads with a cutter head, and then forming and removing the components. Hereinafter, the first conventional example described above with reference to the drawings.
The method comprising the tic parts and the embossed tape will be described. FIGS. 15, 16, and 17 are diagrams showing a method of supplying chip components. Reference numeral 1 denotes a chip component, which is stored in a taping material 2. Reference numeral 3 denotes a suction nozzle for sucking and taking out the chip component 1, and 29 denotes a push-up pin for pushing up the chip component 1. The operation of the screw supply unit configured as described above will be described below. Chip component 1 fed at a constant pitch by taping material 2 directly below suction nozzle 3
Is sent. Next, when the suction nozzle 3 starts vacuum suction as shown in FIG. 9, the suction nozzle 3 descends to adhere to the upper surface of the chip component 1 and suck the chip component 1. Immediately before the suction nozzle 3 starts to move upward, the push-up pin 29 starts to move up, takes out the suction nozzle 3 and the chip component 1 onto the taping material 2 while grasping the chip, moves after moving up, and moves the chip component. 1 is attached. The push-up pin 29 descends to the original position after the chip component 1 is taken out. The above operation is repeated, and the chip components are sequentially mounted.

However, according to the above-described method in which the suction nozzle 3 is brought into close contact with the upper surface of the chip component 1 and suction is performed, the shape of the screw head is various and the cross shape for screw tightening is provided. Since the upper surface has a groove or the like, it is difficult to directly suction the upper surface of the screw. If the screws are not directly sucked, the screws must be moved in the air, which also has a problem.

In view of the above problems, the present invention accommodates a screw in a component assembly having a hole through which a screw portion is inserted and retained, with a leg portion of the screw protruding from the hole. The suction pipe is brought into close contact with the upper surface of the taping material, then the push-up pin is raised, and the screw is fed into the suction pipe and the screw is sucked up by the suction pipe, thereby providing a stable supply of screws. .

Means for Solving the Problems In order to solve the above-mentioned problems, the screw tightening method of the present invention can arrange a number of screws at equal intervals, insert the screw legs of the screw component, and press the screw portion to the extent that the screw does not fall off. The screw component assembly containing the screw components is intermittently fed at a pitch equal to the interval between the hole portions into a taping material having a hole having a notch to make the stored screw components sequentially sent out to a predetermined position. In the process, the tip of the pipe is brought into close contact with the taping material by relatively moving the screw tightening head while applying a negative pressure to the inside of the pipe, and the push-up pin of the push-up portion is raised from the lower side of the taping material to push up the screw part. Removing the screw component from the taping material and engaging the groove in the head of the screw component with the bit in the pipe; and holding the screw component on the bit. Screwing the fastening head to the threaded portion.

According to the present invention, the suction nozzle is closely attached to the upper surface of the component, and the suction pipe is brought into close contact with the upper surface of the taping material containing the screw, and is sent into the suction pipe with a push-up pin. By sucking the screw, the head, such as a screw, is diversified and has a cross groove or the like on the upper surface, so that stable supply can be achieved even if the head cannot be directly sucked.

Embodiment Hereinafter, a screw supply method and a screw fastening device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of a taping material according to a first embodiment of the present invention;
FIG. 2 shows a cross-sectional side view. FIGS. 3, 4, and 5 show operation side views.

In FIG. 1, reference numeral 4 denotes a taping material having a notched hole through which a screw leg portion can be inserted and the screw portion can be pressed to the extent that the screw does not fall off, and 5 is a screw.

Reference numeral 6 in FIG. 3 denotes a pipe for sucking a screw,
7 is a bit for tightening the screw, and 10 is a push-up pin. The operation of the screw feeding method configured as described above will be described below with reference to FIGS. 3, 4, and 5. The screw 5 fed at a constant pitch by the taping material 4 is sent directly below the pipe 6. Next, the pipe 6 descends at the same time as the start of vacuum suction, and comes into contact with the upper surface of the taping material 4 to stop and adhere thereto, so that a negative pressure is generated inside the pipe 6 and outside the concave portion of the taping material 4.

The push-up pin 10 rises and feeds the pipe 6 while removing the screw from the taping material 4. The bit 6 is sucked up by the pipe 6 and abuts on the pit 7, and the bit 7 rotates and engages with the groove of the screw. Further, the pipe 6 and the bit 7 are raised and moved, and the screws are tightened.

Next, another embodiment of the first embodiment of the present invention will be described. 6 and 7 show an embodiment.
The drawing shows a taping material 9 in which the number of rows of screws is a plurality of rows, and the stock amount of screws can be increased.

Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 8 is a perspective view of a screw supply unit,
FIG. 9 is an enlarged view of the concave groove portion of the taping conveyance path in the embodiment. In FIG. 8, reference numeral 4 denotes an assembly of screw parts, that is, taping, which extends from the state of the reel 11 to the escape portion 12 at the leading end. Reference numeral 25 denotes a tape feed unit for feeding the screw component assembly 4 at a constant pitch. Reference numeral 6 denotes a pipe which takes out the screw 5 from the screw component assembly 4. A robot 21 moves the pipe 6 to a predetermined position. 13
Is a taping conveying path, as shown in FIG. 9, provided with a concave groove for letting out a screw leg protruding from the taping bottom. The operation of the screw component supply device configured as described above will be described below with reference to FIGS. 8 and 9.

The screw component assembly 4 in which screw components are taped at predetermined intervals in a long shape is wound around a reel 11 and attached to the present supply device. The leading portion of the taping passes through the taping transport path 13 of the present apparatus, reaches an escape portion, and is fed by the tape feed unit 25 at a constant pitch. Here, the screws 6 are supplied one by one. The screw 45 is supplied at a predetermined pitch by the tape feed unit 25 through a feed hole 14 provided at a predetermined interval in the screw component assembly 4, and a screw foot protruding from the bottom of the taping 4 escapes into the taping conveyance path 13 and is recessed.
Since 15 is provided, it is supplied stably without obstructing feeding. When the screw supplied just below the pipe 6 is lowered and the pipe 6 corresponds to the screw part assembly 4, as in the first embodiment, the screw is taken out, moved to a predetermined position by the robot 21 and screwed. It is.

Next, a third embodiment of the present invention will be described with reference to the drawings. FIG. 11 is a perspective view of the screw fastening device.
Reference numeral 16 denotes a screw supply unit, which is mounted on a gantry 18 via a mounting plate 17. Reference numeral 19 denotes a suction pipe replacement unit, which is mounted on the mounting plate 17 in a pair with the screw supply unit 16. Reference numeral 20 denotes a screw tightening head, which is mounted on the robot 21. 23 is a controller, which controls each unit. 22 is a work. About the screw tightening device configured as above,
The operation will be described below with reference to FIG. The screw supply unit 16 is fed one pitch below the screwing head 20. The screwing head 20 is lowered, and the screw 5 is removed from the screw supply unit 16 as in the first embodiment.
Take out to the side and rise. The robot 21 moves to a predetermined position by the controller 23 and the screw tightening head on the work 22.
20 descends, comes into contact with the upper surface of the work 22 and stops, and the screws are tightened. Next, when a different workpiece 22 flows and a different kind of screw is to be tightened, the screw tightening head 20 moves to the suction pipe changing unit 19 by the robot 21, the pipe is automatically changed, and the different kind of screw is tightened.

Next, a fourth embodiment of the present invention will be described with reference to the drawings. FIG. 12 is a perspective view of the screw fastening device.

In FIG. 12, reference numeral 16 denotes a screw supply unit incorporating the screw 5, which is mechanically fed. Reference numeral 20 denotes a screw head for fastening the screw 5. 26 is a Z-axis unit for moving the screwing head 20 up and down. 27 is the screw supply unit
Reference numeral 16 denotes the slide guide for moving, and reference numeral 28 denotes an actuator. Reference numeral 21 denotes a robot that mounts the screw supply unit 24, the slide guide 27, the actuator 28, the screw tightening unit 25, and the Z-axis unit 26, and moves to a predetermined position. Reference numeral 22 denotes a work. The operation of the screw tightening device configured as described above will be described with reference to FIGS. 12 and 13. First, bit 7 and pipe 6 in the state of FIG.
Descends first to the screw supply unit 16, adsorbs the screw 5, and rises. Next, as shown in FIG.
Is retracted on the slide guide 27 by the actuator 28. Next, the pipe 6 having sucked the screw 5 and the rotating bit 7 are lowered to the work 22 and screwed to a predetermined position. After completion, pipe 6 and bit 7 rise. The screw supply unit 16 is mechanically fed with the advance, and the screw 5 is prepared in the bit 7. The cycle in which the robot 21 sequentially moves to the next point is repeated, and the screws are sequentially tightened.

Effects of the Invention As described above, according to the present invention, screws can be supplied stably and screws can be tightened at predetermined positions. In particular, it is effective for supplying and tightening a screw with a short leg length or a screw with a small leg diameter compared to the diameter of the leg portion of the screw.

[Brief description of the drawings]

FIG. 1 is a plan view of a screw component assembly according to a first embodiment of the present invention, FIG. 2 is a sectional side view of the same, FIG. 3, FIG.
The figure is a side sectional view of the screw component assembly showing the operation of the screw supply method, FIGS. 6 and 7 are the same side sectional view as the plan view of the screw component assembly in another embodiment, and FIG. FIG. 9 is an enlarged perspective view of a concave groove portion of a taping conveyance path in the embodiment, FIG. 10 is a cross-sectional view of the taping conveyance path, and FIG. 11 is a perspective view of the third embodiment. FIG. 12 is a perspective view of the screw fastening device, FIG. 12 is a perspective view of the screw fastening device in the fourth embodiment, FIGS. 13 and 14 are side views of the device.
FIG. 15, FIG. 16, and FIG. 17 are side sectional views of a conventional chip section supply section. 1 ... chip parts, 2,4 ... taping material, 3 ... nozzle, 5 ... screw, 6 ... pipe, 7 ... bit, 9 ...
Taping material, 10 ... Push pin, 11 ... Reel, 12
… Escape part, 13… Taping conveyance path, 14… Feed hole, 15… Groove, 16… Screw supply unit, 17…
Mounting plate, 18 Stand, 19 Suction pipe exchange unit, 20 Screw head, 21 Robot, 22
... Work, 23 ... Controller, 24 ... Reel, 25 ...
Tape feed unit, 26 Z-axis unit, 27 Slide guide, 28 Actuator.

Claims (1)

(57) [Claims] 1. A taping material having a plurality of notches, which are arranged at equal intervals and have notched holes through which the screw legs of the screw component can be inserted and the screw portion can be pressed to the extent that the screw does not fall off, is housed. Intermittently feeding the assembled screw parts at a pitch equal to the interval between the holes, and sequentially feeding the stored screw parts to a predetermined position, and moving the screw tightening head relative to each other while reducing the pressure in the pipe. The tip of the pipe is brought into close contact with the taping material, and the push-up pin of the push-up portion is raised from the lower side of the taping material to push up the screw component, thereby extracting the screw component from the taping material and inserting the groove at the head of the screw component into the pipe. And a step of screwing the screw head held by the bit to the threaded portion. Screw fastening how to.