JPS596985Y2 - Fastener parts supply device for fastener fastening machine - Google Patents

Description

[Detailed Description of the Invention] The present invention is an apparatus for automatically feeding fastener parts such as screws, rivets, or pins to the lower part of a fastening rod, such as a bit or stem, of a fastener fastening device. The present invention relates to a device for accurately positioning on the axial extension of the

In general, fastener fastening machines include screw tightening machines, rivet crimping machines, and pin press-fitting machines, but in particular, fastener fasteners with heads are aligned and flowed down by diagonal rails and supported on the extension of the axis of the fastening rod. had the following problems.

In other words, if the leg length is equal to or shorter than the head diameter, the fastener parts may fall over or tilt between the lower end of the diagonal rail and the catcher that holds the fastener parts. However, it often happens that one part of the fastener cannot be accurately positioned on the extension of the axis of the fastening rod, making the work of fastening one part of the fastener to the work unstable.

In addition, in order to solve these problems, there is a method described in Japanese Patent Publication No. 46-25078, which aligns the screws supplied from the hopper with a conveyor installed at an angle. The lowermost screws are prevented from flowing down by the elastic fingers at the lower end of the conveyor, and the lowest end of the aligned screws are restrained and held one by one by the fingers of the feeder and conveyed to the lower part of the tool.

However, in this case, the screws at the lowest end of the elastic fingers on the extension of the conveyor are grabbed and carried one by one with the fingers of the feeder, so when the screws are grabbed from the conveyor with the fingers, Since the legs of the screw protruding downward from the elastic fingers are gripped by the fingers, the screws often fail to grip the screws, especially when the legs of the screw are short, making the supply of screws unstable.

Also, when the screws are removed from the elastic fingers of the conveyor, they are forcibly removed from the elastic fingers, which causes the screws to remain slanted so that they remain aligned with the center line of the tool even when they are conveyed downwards. The screws are not held securely by the fingers of the tool.

Furthermore, since it is necessary to once grasp the screw and carry it to the bottom of the tool, the structure becomes complicated and there are problems such as a large number of parts, and a satisfactory solution has not yet been expected.

The purpose of the present invention is to solve these problems and to position one part of the fastener accurately on the extension of the axis of the fastening rod. The explanation will be based on the drawings.

In Fig. 1, reference numeral 1 denotes a column that supports a frame 3 on which a screwdriver 2 is attached so as to be able to reciprocate in the axial direction, and this column 1 is fixed to a machine base (not shown) by a bracket 4. .

A support arm 6 that supports the lower part of a guide tube 5 fixed to the lower end of the screw driver 2 is attached to the left end of the frame 3, and the guide tube 5 is slidable back and forth in the axial direction with respect to the support arm 6. It is.

As shown in FIGS. 4 and 5, a bit 7 of a screwdriver 2 is inserted into the guide tube 5 so as to be slidable back and forth in the axial direction and rotatable.

The tip of the bit 7 is inserted into the guide tube 5, and a suction tube 8 is connected to the top of the guide tube 5, which is connected to a vacuum generator (not shown) that sucks air from the tip of the tube 5. ing.

This suction action is for holding the screw 9 at the tip of the bit 7.

10 is the screw driver 2 and guide tube 5;
This is a stopper bolt that determines the lowering position.

Reference numeral 11 denotes a diagonal rail consisting of two plates that support the neck of the screw 9 from a screw supply hopper (not shown) and allow the legs to pass through the diagonal rail 11. A head holding plate 12 parallel to the upper surface of the diagonal rail 11 is provided slightly above the groove defined by the plate.

This head holding plate 12 prevents the head of the screw 9 from popping out as it flows down.

At the lower end of this diagonal rail 11, there is a component separation mechanism A that separates the screws 9 that are continuously aligned and flowing down one by one as shown in FIGS. The screw 9 is separated by a pair of shuttle screws 13a and 13b that reciprocate once in one cycle of the two lifting and lowering operations.

These shuttle screws 13a and 13b are attached to the diagonal rail 11.
These shuttle screws 13a are provided on the left and right sides of the
, 13b are provided parallel to each other with an interval between them to sandwich the leg of one screw 9 by the shuttle screws 13a and 13b.

Furthermore, as shown in FIGS. 1 and 2, a reciprocating power source 14 is disposed parallel to the diagonal rail 11, and a rod 14a that performs reciprocating motion by this reciprocating power source 14 has an actuating member at its tip. A plate 15 is fixed.

An operating pin 17 is attached to the lower end of the operating plate 15 to turn on or off a microswitch 16 for confirming the retracted position of the rod 14a, and this microswitch 16 is fixed to the diagonal rail 11.

A guide rod 18, which is disposed parallel to the diagonal rail 11, passes through the upper part of the actuating plate 15 so as to be slidable back and forth in the axial direction.

This guide rod 1B is provided so as to be able to slide back and forth between the bearings 19a, 19b, and 19C fixed to the diagonal rail 11.
Rod collars 18a and 18b are attached to the upper rod collar 18b at a predetermined interval, and an operating plate 15 is in contact with the upper rod collar 18b during standby.

A compression coil spring 20 is wound between the rod collar 1Ba and the actuating plate 15, and presses the guide rod 18 forward in the axial direction.

A stopper block 22 is fixed to the lower side of the bearing 19a, with which a stopper bolt 21 that is adjustable and attached to the actuating plate 15 comes into contact.

Furthermore, a connecting fitting 23 is attached to the tip of the guide rod 18, and the connecting fitting 23 is movable so as to be in contact with the lower end of the diagonal rail 11 during standby, and whose upper surface is flush with the upper surface of the diagonal rail 11. A rail 24 is pin-coupled by a first pin 25.

This l-th pin 25 is attached to the diagonal rail 11 along a guide rail 26 fixed to the diagonal rail 11 by a distance between the front end surface of the rod collar 18a and the rear end surface of the bearing 19a.
It is possible to move parallel to the

Further, one of the swinging rods 27b is connected to the connecting shaft 27a fixed to the operating plate 15 by a second pin 28, and the other swinging rod 27b is connected to the lower end of the movable rail 24. are connected to each other by a third pin 29.

The distance between the stopper bolt 21 and the contact surface of the stopper block 22 is determined by the movement distance of the movable rail 24 and when the movable rail 24 rotates, the upper surface of the movable rail 24 becomes perpendicular to the axis of the bit 7. This is the sum of the distances.

The movable rail 24 has an inverted L shape, and the movable rail 24
A flow prevention part 24a is provided at the tip of the groove.

Next, the operation of the embodiment of the present invention will be explained.

The screws 9 that continuously flow down on the diagonal rail 11 are separated by the component separation tank structure A, and as shown in FIG.
flows down on the movable rail 24 and stops at a fixed position by the flow prevention mechanism 24a, and then a switch (not shown) to start the screw fastening work is turned on, and the first pin 25 of the movable rail 24 moves onto the guide rail. 26 and moves forward diagonally downward under the action of the reciprocating power source 14.

When the movable rail 24 moves forward by a preset distance by the rod collar 18H, the movable rail 24 stops moving forward, but the rod 14a is further moved forward by the stopper bolt 24.
1 moves forward until it hits the stopper block 22, the compression coil spring 20 is compressed, and the swinging rod 2
7b also moves forward and rotates clockwise, so the movable rail 2
4 also rotates clockwise around the first pin 25, and the upper surface of the movable rail 24 becomes perpendicular to the axis of the bit 7 (
(See Figure 4).

When the movable rail 24 becomes vertical, air is sucked from the tip of the guide tube 5 by the vacuum generator.
The screw 9 is attracted to the tip of the bit 7 with its head upward in the guide tube 5 (see FIG. 5).

When the screw 9 is attracted in this way, the reciprocating power source 14
Since the rod 14a moves backward, the movable rail 2
4 rotates counterclockwise, retreats diagonally upward along the guide rail 26, and stops in contact with the lower end of the diagonal rail 11 (see FIG. 6).

Thereafter, the screw driver 2 starts rotating, and at the same time, the driver 2 and the guide tube 5 perform a downward movement, and the screw 9 descends above a workpiece (not shown) while being held by suction.

When the tip of the screw 9 comes into contact with the upper surface of the workpiece, the guide tube 5 stops descending, but the bit 7 continues to descend, and the bit 7, which is rotated by the screwdriver 2, fastens the screw 9 to the workpiece.

When this fastening operation is completed, the suction action is stopped, the screwdriver 2 and the guide tube 5 rise again and return to their original positions, and the rotation of the screwdriver 2 is stopped.

Further, as the component separation mechanism A operates due to the upward and downward movement of the driver 2, only one of the next screws 9 is separated and flows down to a predetermined position by the flow prevention part 24a of the movable rail 24 and waits for the next screw. When the switch to start work is turned on, the above operations are repeated again.

As is clear from the above embodiments, the present invention automatically supplies fastener parts such as screws, rivets, or pins by sequentially arranging them from a fastener part supply hopper via a diagonal rail. In a fastener fastening machine that fastens with a fastening rod of a fastener fastening device, one fastener part is attached to the lower end of a diagonal rail 11 where the neck is supported and flows down in an aligned manner. A component separation mechanism A is provided at the lower end of the diagonal rail 11 to separate the parts so as to feed them forward, and the fastener component is separated by the component separation mechanism A and supplied one by one, and the rotation center is on the extension of this diagonal rail 11. When the fastener is supplied, it contacts the lower end of the diagonal rail 11 and is flush with the upper surface of this rail, and when the fastener part is supplied on the extension of the axis of the fastening rod of the fastener fastening device, it touches the axis of the fastening rod. Since the movable rail 24 is provided with an upper surface that is almost perpendicular to the upper surface, it is possible to accurately hang a fastener part with the head upward on an extension of the axis of the fastening rod. Even if the leg length is approximately equal to the diameter or shorter, the fastener parts will not fall over or tilt, so the fastener parts can be accurately positioned on the extension of the axis of the fastening rod. This makes it possible to securely connect a fastener part to a workpiece.

Furthermore, each fastener component is separated one by one by the component separation mechanism A and can flow down naturally onto the movable rail 24 located at the lower end of the extension of the diagonal rail 11 without tilting or falling over. Since the movable rail 24, which has its center of rotation on the extension of the diagonal rail 11, is rotated forward to feed the fastener on the extension of the axis of the fastening rod of the fastener fastening device, one part of the fastener can be easily removed during each work cycle. Supply is assured, and stable and reliable fastening work can be achieved.

Furthermore, since the movable rail 24 is arranged at the lower end of the diagonal rail 11 and only the movable rail 24 is given linear rotational motion, the structure is simple, the number of parts is small, and reliable operation can be achieved. It is possible to obtain the following effects.

[Brief explanation of the drawing]

Figure 1 is a front view showing an embodiment of the present invention, Figure 2 is a front view showing how a screw is sucked into a guide tube, and Figure 3 is a front view showing an embodiment of the present invention.
6 through 6 are enlarged partial cross-sectional views showing the operation of the main parts of the present invention, FIG. 7 is an enlarged end view taken along line VIIVII in FIG. 1, and FIGS. 8 and 9 are main points showing the operation of the component separation mechanism. It is a partial cross-sectional plan view. A is a parts separation mechanism, 1 is a column, 2 is a screw driver, 3 is a frame, 4 is a bracket, 5 is a guide tube, 6 is a support arm, 7 is a bit, 8 is a suction tube, 9 is a spring, 10 is a Stopper bolt, 11 is a diagonal rail, 12 is a head holding plate, 13a, 13b are shuttle screws, 14 is a reciprocating power source, 14a is a rod, 15 is an operating plate, 16 is a micro switch, 17 is an operating pin, 1B is Guide rod, l
ea, 18b are rod collars, 19 a, 19 b,
19 C is a bearing, 20 is a compression coil spring, 21
is the stopper bolt, 22 is the stopper block, 23
24 is a connecting metal fitting, 24 is a movable rail, 24a is a flow prevention part, 25 is a first pin, 26 is a guide rail, 27b is a swinging rod, 28 is a second pin, and 29 is a third pin.

Claims (1)

[Scope of Claim for Utility Model Registration] In a fastener fastening machine that fastens fastener parts to a workpiece using a fastening rod of a fastener fastening device, the fastener parts are sequentially aligned and automatically fed from a fastener part supply hopper via an oblique rail. A component separation mechanism is provided at the lower end of the diagonal rail where the parts flow down in alignment, and the component separating mechanism is provided to separate the components so as to supply one component forward for each cycle of fastener fastening work, and furthermore, at the lower end of the diagonal rail, a component separation mechanism is provided. It has a rotation center on the extension, and when a fastener part is supplied from the parts separation mechanism, it comes into contact with the lower end of this diagonal rail and is flush with the upper surface of this rail, so that the fastener part is in the same plane as the upper surface of this rail. 1. A fastener component supply device comprising a movable rail having an upper surface that is substantially perpendicular to the axis of the fastening rod when the fastening rod is fed on an extension of the axis of the fastening rod.