JPS6263025A - Headed bar feeder - Google Patents

Abstract

PURPOSE:To prevent a screw or the like from flowing backward on a chute or jumping out of it as well as to improve reliability at the time of operation at high speed, by installing both shifting and jumping preventers, in case of a head bar feeder for screws, revets, etc. CONSTITUTION:When both chutes 7a and 7b of a screw clamper 6 is moved to a position there they are opposed to chutes 25a and 25b by an arm 3 of a robot 1, an air cylinder 32 operates, and a jumping preventive claw 18 is rotated by a striker 31, opening these chutes 7a and 7b. And, with an air cylinder 29, screws 8 between a stop claw 27 and a separation claw 28 are fed to these chutes 7a and 7b stopped by a stop claw 10. Next, a screw clamper 6 is moved to the specified position by the robot 1 but at this time, such motion that these screws flows back in the opposite direction due to centrifugal force is prevented by pressing force of a shifting preventive claw 12 and also they are prevented from jumping out by the jumping preventive claw 18. And, with a solenoid 13, a separation claw 11 makes a catcher 33 hold only one piece of these screws 8, thus screw-down takes place with the screw clamper.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is a device for separating and feeding headed bars, such as screws and rivets, which reliably feeds each headed bar one by one even when the device itself moves at high speed. This invention relates to a headed bar supply device that is capable of separately supplying.

Conventional technology Regarding the conventional headed bar supply device, Japanese Patent Application Laid-open No. 156-1983
This will be described based on Publication No. 174. Japanese Patent Publication No. 67-1561
In Publication No. 74, a screw tightening machine mounted on an XY table having a positioning function is configured to receive screws intermittently from a screw supply section that is not mounted on the XY table but is placed separately. The screws are conveyed in alignment from a separate screw supply section, pass through a sub chute rail, and are supplied to and held by a main chute rail mounted on an XY table.

After setting the position of the screw tightening machine using the XY table, the screws are separated and supplied one by one from the main chute rail to the screw tightening machine, and the screws are tightened.

Problems to be Solved by the Invention When the screws held on the main chute rail are moved at a slow speed of the XY table for positioning, it is possible to separate and supply the screws without being affected by the speed. It is. However, as the movement speed of the positioning barrel increases, forces such as centrifugal force act on the screws on the main chute rail, causing the screws to flow backwards on the chute, jumping out of the chute, or separating the screws one by one. There were problems such as changes in

Therefore, the present invention makes it possible to reliably separate and feed headed bars one by one even when the headed bar separation and supply device constituted by the above-mentioned main chute rail moves at high speed. It is.

Means for solving the problems and technical means of the present invention for solving the above problems are to prevent the headed bars that are conveyed in alignment on the chute from moving in the opposite direction to the conveyance direction and flowing backwards. A device shall be provided.

For production The effect of this technical means is as follows.

That is, the movement prevention device allows the headed bars on the chute to wait at a predetermined position even when the chute moves at high speed, and it is possible to reliably separate and supply one bar at a time. Thereby, the reliability of the headed bar separation and supply device that moves at high speed can be improved.

EXAMPLE An example of the present invention will be described below based on FIGS. 1 to 10. In Figure 2, 1 is an industrial robot,
Arms 2 and 3 can be rotated by motors 4 and 5. 6 is a screw tightening machine fixed to the arm 3. 7a
, 7b is a chute fixed to the screw tightening machine, and is provided with a groove smaller than the head diameter of the screw 8 and slightly larger than the shaft diameter. This is a regulation plate that prevents the screws 8 held in alignment above a and Tb from flying out from the shoes 1-7a and 7b.

Reference numeral 1o denotes a stop pawl provided at the tips of the shoes 7a and 7b so as to be able to come into contact with the shaft of the screw. Reference numeral 11 denotes a separation claw that forms a groove portion whose distance from the stop claw 1o is larger than the shaft diameter of the screw and smaller than the head diameter. 12 is a movement prevention claw, and separation claw 1
The screw 8 in the vicinity of the screw 1 forms a movement prevention device that prevents the screw from moving in the direction opposite to the direction of conveyance and backflow.

Reference numeral 13 denotes a llenoid, which is a driving source for the separation claw 11, the stop claw 10, and the movement prevention claw 12 via the arm 14 and levers 15 and 16 fixed to the arm 14. A spring 17 biases the arm 14. 18 is chute 7a, 7
With the protrusion prevention claw provided at the other end of b, the shoe) 76
, 7b. Even if the screws suspended on the shoes 7a and 7b flow backward, a fly-out prevention device is provided to prevent the screws from flying out from above the shoes 7a and 7b. The pop-out prevention claw 18 is biased by a spring 19 and can rotate around the pin 2o.

21 is the meniscus, which is provided on the outer circumferential arc of the
A fan-shaped blade 23 capable of capturing the screw 8 stored in the screw 22 performs a swinging motion by a swinging mechanism (not shown) as a motor 24'ii drive source. A groove is provided which is smaller than the head diameter of the screw 8 and slightly larger than the shaft diameter, and the head of the screw 8 is suspended for alignment and conveyance. 26 is shoot 26
This is a regulating plate that prevents the screws 8 held in alignment on the chutes 25a and 25b from flying out from above the chutes 25a and 25b. 27 is chute 25 a.

This is a stop pawl provided at the tip of 26b so as to be able to come into contact with the shaft of the screw. Reference numeral 28 denotes a separating pawl, which is provided at a distance from the stop pawl 27 such that a plurality of screws can be held in an aligned state. Reference numeral 29 denotes an air cylinder which is a driving source for the stop claw 27 and separation claw 28. Reference numeral 3o denotes a lever, which is provided with a numeral 31 at its tip and can be slid using an air cylinder 32 as a driving source.

The operation of the headed bar separation and supply device configured as above will be described below.The screws 8 stored in the hopper 22 are captured by the swinging movement of the blade 23, and then suspended on the chutes 2sa and 2sb. They are conveyed in alignment and stopped by the stop claws 27. Then, the screw driver 6 fixed to the arm 3 of the industrial robot 1 moves, and the chute 7 fixed to the screw driver 2 moves.
A, 7b and shoes 25&, 25b are in a state of facing each other (FIG. 5). Next, the air cylinder 32 is operated so that the stopper 31 comes into contact with the pop-out prevention pawl 18, and the pop-out prevention pawl 18 rotates to open the grooves of the shoes 7a and 7b (FIG. 6). In this state, the air cylinder 29 operates and the plurality of screws held between the stop claw 27 and the separation claw 28 are supplied from above the shoes 25a and 25b onto the chutes 7a and Tb and are locked by the stop claw 1o. (Figure 7).

At this time, the screw near the separating claw 11 is pressed with its shaft by the anti-movement claw 12, and then the screw is removed (7a).

It is locked so that it does not move on 7b and flow backwards. In this state, the screw tightening machine 6 is moved to a predetermined position by the industrial robot 1 for screw tightening. At this time, if the moving speed is fast, the screws 8 on the chutes 7a and 7b will
Due to centrifugal force, it tries to flow backwards in the opposite direction to the transport direction.

However, the screw 8 near the separating claw 11 can be maintained in a predetermined position on the shoes 7a and Tb by the movement preventing claw 12 (FIG. 1). Also, shoot 5
The screws 8 flowing backward on the chutes 5a and sb can be prevented from flying out and scattering from the chutes 5a and sb by the anti-flying claws 18. Immediately after the positioning by the industrial robot 1, the renoid 13 operates (FIG. 10), and the separating claw 11 separates only one screw t-1 on the shoe) 7a, 7b, and the catcher installed in the screw tightening machine 6 −
After the screw 8 is held by the screw 33 (FIG. 8), the screw is tightened by the screw tightening machine 6. And chute 7a
.

After tightening the number of screws above Tb, screws are supplied again as shown in FIGS. 6 and 7, and this process is repeated.

As described above, the movement prevention claw 12 and the pop-out prevention claw 18 eliminate the influence of centrifugal force caused by high-speed movement of the screws held on the shoes 7a and Tb, and it is possible to reliably separate and supply the screws. It is.

In the present invention, the movement prevention pawl 12 presses and locks the shaft portion of the headed bar, but it is also possible to lock the movement prevention pawl 12 without providing a protrusion or pressing it.

Effects of the Invention As described above, the present invention provides a headed bar material separation and supply device,
A movement prevention device for the headed bar is provided to prevent the headed bar from moving in the opposite direction to the transport direction or flowing backwards and flying out of the apparatus. This has the effect that screws can be reliably separated and supplied in a screw tightening machine or the like that operates at high speed.

[Brief explanation of the drawing]

1 and 8 are partial plan views of a headed bar material separation and supply device according to an embodiment of the present invention, FIG. 2 is a side view of an automatic screw tightening machine using the headed bar material separation and supply device, and FIG. 3 is a plan view of the same, FIG. 4 is a side view of the same main part, FIGS. 6, 6, and 7 are detailed views of A' in FIG. FIG. 4 is a sectional view taken along line BB in FIG. 4; 1...Industrial robot, 6...Screw tightening machine, 7a. 7 b, 25 a, 25 b -- shoot,
10.27...Stop claw, 11,28...
・Separation claw, 12...Movement prevention claw, 18...
・Protrusion prevention claw. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure '7a, 7b---Shoo Y to--Ichihoyo 9ff--→Se to f2-11 Tokudo Geki Bunmaruso Figure 4 Figure 9 Figure f7 Figure 10

Claims (4)

[Claims] (1) It has a chute that suspends the heads of the headed bars and conveys them in alignment, and separates the headed bars on this chute one by one,
A headed bar supply device that supplies a headed bar to a predetermined position, characterized in that the headed bar is provided with a movement prevention device so that the headed bars that are aligned and conveyed on the chute do not move in a direction opposite to the conveying direction. . (2) A flying-out prevention device provided at the other end of the chute so as to prevent the suspended headed bar from flying out of the chute even if it flows backwards on the chute. Headed bar supply device as described in section. (3) The movement prevention device is configured to press and lock the legs of the headed bar in a direction perpendicular to the conveying direction while it is being moved to a predetermined position. Headed bar supply device. (4) The head according to claim 1, wherein the movement prevention device has a claw that projects into the conveyance path of the headed bar while it is being moved to a predetermined position. Bar material feeding device.