JPH1148050A - Holding device for head-equipped component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a holding device for head-equipped component which can supply even a component having long legs smoothly and hold them in correct attitude and whose chuck pawls can be spread in good timing. SOLUTION: A holding device has a pair of chuck pawls 11 mounted on a chuck body 10, and the pawls are provided at their mating surfaces with holding holes 11a having cross-section shape not admitting passage of any component equipped with a head. The pawls are spread by a spreading means 12 so that the legs of the component can pass through the holding holes. The spreading means is furnished with pins 19 attached to the pawls symmetrically as pinching the mating surfaces and a pressing member 18 which can advance in such a way as pushing aside the pins as operated by an air cylinder 17, and the air supply source of a component supply device to force feed by pressure components with head by the air is distributed to the air cylinder 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for holding a headed component such as a screw or a rivet for temporarily holding the headed component in an automatic assembling machine or the like.

[0002]

2. Description of the Related Art Conventionally, an automatic assembling machine that handles a headed part such as an automatic screw tightening machine and a rivet caulking machine has been required to temporarily hold the headed part on a moving path of a working tool such as a driver bit. In addition, a headed component holding device is used. Generally, the headed component holding device includes a main body connected to a table, an arm, and the like on the automatic assembly machine side, and a pair of chuck claws rotatably connected to a tip of the main body. A tool guide hole for guiding a work tool and a guide path for a headed component for guiding a headed component supplied from a component supply device such as a feeder are formed in the main body.
Further, a holding hole communicating with the guide path is formed separately on the opposing surface of the chuck claw, so that a supplied headed component can be held. This holding hole has a cross-sectional shape that allows the head of the headed part to pass near the tip of the chuck claw when the chuck claw is closed, and the tip passes only the leg of the headed part. It is formed to have a possible cross-sectional shape.

[0003]

However, in the above-mentioned conventional device for holding a headed component, the cross-sectional shape of the holding hole is required in order to smoothly pass the leg of the headed component to the tip of the holding hole. It must be sufficiently larger than the cross-sectional shape of the legs of the head part, so that a gap is created between the legs of the held headed part and the holding holes. For this reason, the headed part swings and tilts in the holding hole due to the vibration caused by the operation of the automatic assembling machine or the like. Problems such as being unable to do so. In particular, in the case of a headed part with long legs, even if the holding hole is enlarged, even if it is slightly tilted, the tip part will deviate greatly from the core wire of the holding hole, and conversely, if the holding hole is made small, the long leg will There are conflicting problems, such as being unable to pass through the holding hole and being clogged halfway.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and enables even a headed part having a long leg to be smoothly supplied and held in a correct posture, and that a chuck claw is provided. It is an object of the present invention to provide a headed component holding device that can be expanded in a timely manner. In order to achieve this object, the present invention provides a chuck body in which a guide path for guiding a headed component supplied from a component supply device is formed, and biases the chuck body to be rotatable and always closed. A pair of chuck claws that are attached to the chuck pawl, and holding holes that are formed separately on the opposing surfaces of the chuck claws so as to communicate with the guide path. The holding hole has a cross-sectional shape that does not allow passage of the headed part at all times, and when the chucking claw is expanded by the expanding means, the legs of the headed part can pass and the head cannot pass. State.

[0005] The expanding means includes a pin symmetrically attached to the chuck pawl so as to sandwich the opposing surface, a pressing member having a width larger than the interval between the pins, and advancing the pressing member by a predetermined distance between the pins. It is desirable to have an air cylinder. Further, the component supply device may be configured to feed the headed component by air. In this case, when an air supply source of the component supply device is connected to the air cylinder, the chuck pawl is expanded in accordance with the supply of the screw. It can be opened and is suitable.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3, reference numeral 1 denotes an automatic screwing machine used to fasten a screw, which is a headed part, to a work, and has a guide shaft 3 disposed on the front side of a base 2. , The driver table 4 and the chuck table 5 are each slidably guided.

The driver table 4 is connected to a rod 6a of a cylinder 6 mounted on the upper portion of the base 2, and is configured to reciprocate by the expansion and contraction of the rod 6a. A rotary drive source 7 such as a motor is attached to the driver base 4, and a driver bit 8 having a tip end engageable with a screw drive hole is integrally formed on an output shaft of the rotary drive source 7. Are linked.

The chuck base 5 is connected to a lower portion of the guide shaft 3. The chuck base 5 has a headed component holding device 9 (hereinafter, referred to as a holding device 9) for holding a screw on a moving path of the driver bit 8. (Hereinafter simply referred to as a holding device 9). The holding device 9 includes a chuck body 10 connected to the chuck base 5, a pair of chuck claws 11 rotatably attached to the chuck body 10, and an expanding means for expanding the chuck claws 11. 12 are provided.

The chuck body 10 includes a tool guide path 13 for guiding the driver bit 8 and the tool guide path 1.
3 and a connection pipe 15 connected to the headed component guide path 14. The connection pipe 15 is connected to a screw supply device (not shown). An extended feed hose 16 is connected. The screw supply device is configured to inject compressed air from an air supply source into the supply hose 16 to pressure-feed the screws one by one.

The chuck pawl 11 is provided with a spring (not shown).
A holding hole 11a that is always in communication with the tool guide hole 13 and the guide path 14 of the headed part is formed on the opposing surface thereof in a divided manner. The cross-sectional shape of the tip portion of the holding hole 11a is a circular shape having a diameter smaller than the diameter of the screw leg (the portion where the screw is formed). When the chuck claw 11 is closed, the screw passes. I cannot do it.

The expanding means 12 is symmetrically mounted on the air cylinder 17 serving as a driving source, a pressing member 18 mounted on the tip of a rod 17a of the air cylinder 17, and the chuck claw 11 with its facing surface interposed therebetween. It comprises pins 19 and 19. The pressing member 18 is connected to the pin 1
It is formed of a columnar member having a diameter larger than the distance between the pins 9 and 19, and its tip is formed into a tapered surface 18a, so that the diameter of the front end face is smaller than the distance between the pins 19 and 19. An air supply hose 20 branching from the feed hose 16 is connected to a port on the rod extension side of the air cylinder 17 so that the screw can be sent by sharing the air supply source of the screw supply device. The rod 17a is configured to extend in accordance with the stroke in conjunction therewith.

In the automatic screw tightening machine 1, when air is injected into the feeding hose 16 from an air supply source of a screw feeding device (not shown), the screw loaded in the feeding hose 16 is supplied. While the rod 1 of the air cylinder 17
7a is extended by the stroke. This allows
Since the pressing member 18 pushes the pins 19, 19 forward by the tapered surface 18a, the chuck pawls 11, 11 are expanded by the amount that the pins 19, 19 are pushed away.
At this time, due to the expanding operation of the chuck claws 11, 11, the tip portion of the holding hole 11a is in a state in which the leg of the screw can pass and the head cannot pass, whereby the leg of the screw becomes the holding hole 11a. Can pass smoothly. In addition, since the air supply source is shared, the chuck claws 11, 11 can be expanded in a timely and reliable manner in accordance with screw feeding.

Thereafter, when the air cylinder 17 moves back and the pressing member 18 retreats from the position where the pin 19 has been pushed away, the chuck claws 11, 11 are closed again and the tip portion of the holding hole 11a is closed again. Hold the leg of the screw inserted in the. For this reason, there is no possibility that the screw is swung and tilted by the vibration accompanying the positioning operation of the automatic screw tightening machine 1 that follows.

After the screw is held on the chuck pawl 11 as described above, when the cylinder 6 is operated at the screw tightening position and the driver table 4 is lowered, the driver bit 8 is also moved forward in the holding device 9 in response to this. The chuck claws 11, 11 are pushed open to push out the held screw onto the work.
At this time, the tip of the screw correctly matches the tightening position of the work (the screw hole provided in the work). The screw released from the holding device 9 in this manner is tightened to the work as the driver bit 8 rotates by receiving the drive of the rotary drive source 7.

In the embodiment of the present invention, an automatic screw tightening machine used for tightening a screw, which is an example of a headed component, has been described. The present invention can be applied to a device that handles a headed component such as a device or a nailing machine, and the effect obtained in this case is the same.

[0016]

As described above, the headed component holding device of the present invention forms a holding hole through which the legs of the headed component cannot pass through the chuck claws urged to be always closed. Expansion means are provided to expand the chuck claws so that the legs of the headed component can pass through the holding hole and the head cannot pass. There is an advantage that the headed component can be pinched and then correctly held along the core line of the holding hole. In addition, an air cylinder is provided as a driving source of the expanding means, and this air cylinder is connected to an air supply source in a headed component supply device. There is an advantage that it is possible to surely expand the opening and to prevent troubles such as clogging of the headed component due to an error in expanding the chuck claw.

[Brief description of the drawings]

FIG. 1 is an enlarged partial cutaway cross-sectional view of a main part of an automatic screwing machine provided with a headed component holding device according to the present invention.

FIG. 2 is a partially cutaway front view of an automatic screwing machine including the headed component holding device according to the present invention.

FIG. 3 is a side view of the headed component holding device according to the present invention.

DESCRIPTION OF SYMBOLS 1 Automatic screwing machine 9 Holding device for headed parts 10 Chuck body 11 Chuck claw 11a Holding hole 12 Expanding means 14 Guide path for headed parts 16 Feeding hose 17 Air cylinder 18 Pressing member 19 Pin

Claims (3)

[Claims] 1. A chuck body in which a guide path for guiding a headed component supplied from a component supply device is formed, and a pair of chucks mounted on the chuck body so as to be rotatable and normally closed. A claw and a holding device for a headed component having a holding hole divided and formed on the opposing surface of the chuck claw so as to communicate with the guide path, wherein the headed component cannot always pass through the holding hole. A cross-sectional shape is provided, and expanding means for expanding the chuck pawl is provided so that the leg of the headed component can pass through the holding hole and the head cannot pass through the holding hole. Headed parts holding device. And a pressing member having a width larger than a distance between the pins, a pressing member having a width larger than a distance between the pins, and a pressing member extending between the pins by a predetermined distance. The holding device for a headed component according to claim 1, further comprising an air cylinder configured to perform the operation. 3. The headed component according to claim 2, wherein the component supply device is configured to feed the headed component by air, and an air supply source of the component supply device is connected to an air cylinder. Holding device.