JPH10328948A - Headed parts holding mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide headed parts holding mechanism that can cope with holding various kinds of headed parts. SOLUTION: Headed parts holding mechanism is provided with a body part 14 with a tool guide path and a parts guide path formed so as to be able to guide a working tool of a working unit and supplied headed parts respectively, a pair of catchers 15 arranged at the tip of the body part 14 and having holding holes dividedly formed to hold the headed parts fed in the parts guide path, a parallel chuck 19 for opening/closing the catchers 15 when the headed parts are fed, and a stopper 21 protruded onto an opened moving path of the catchers 15 when the headed parts are fed. The stopper 21 is so constituted as to be able to adjust a position of stopping opening of the catchers 15 by tightening/ loosening of a screw 21 according to the kinds of the headed parts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a headed component holding mechanism for temporarily holding a headed component such as a headed screw at a distal end portion of an automatic screwing machine or the like, and more particularly to a catcher for holding a headed component. The present invention relates to a mechanism for holding a headed component having a stopper capable of adjusting the opening of the head.

[0002]

2. Description of the Related Art Conventionally, as a mechanism for holding headed parts,
The one disclosed in Japanese Utility Model Application Laid-Open No. 61-127797 is known. This holding mechanism for a headed component includes a pair of jaws each having a holding hole for holding a headed component, each sliding member installed at an upper end portion of the pair of jaws, and a reciprocating drive source at a position sandwiching the jaws. The guide shaft is configured to be reciprocally movable in the axial direction by receiving the drive. A cam member is integrally attached to the guide shaft, and the jaw is expanded by pushing the slide member with the cam member as the guide shaft moves. In addition, this cam member is attached to upper and lower two stages, and the jaw is slightly opened by the lower cam member, the jaw is fully opened by the upper cam member, and the jaws are closed between them. ing.

[0003]

In the above-mentioned conventional headed component holding mechanism, since the expansion of the jaws is regulated by the cam member, the expansion amount at the time of the first slight expansion is constant. In addition to the problem that the types of headed parts that can be held are limited, there are also problems such as the necessity of large-scale equipment remodeling such as replacement of cam members to change the expansion amount. I have. In addition, since the jaw expands during the return operation of the guide shaft, the headed screw cannot be supplied in preparation for the next work during that time, and the work efficiency is deteriorated. It has occurred.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a mechanism for holding a headed component capable of coping with various types of headed components. I do. In order to achieve this object, the headed component holding mechanism of the present invention temporarily holds the headed component supplied from the component supply device in front of the work unit, and can guide the work tool of the work unit. A main body portion in which a tool guide path and a component guide path capable of guiding a supplied headed component are formed, and a holding hole that is disposed at the tip of the main body portion and that can hold a headed component sent through the component guide path. A pair of separately formed catchers, opening / closing means for opening and closing the catcher when a headed component is sent from the component supply device, and on an expanding movement path of the catcher when the headed component is supplied from the component supply device And a stopper that can adjust the degree of opening of the catcher at the time of widening.

[0005] The stopper may be formed so that the holding hole protrudes so as to stop the catcher at a position where the shaft of the headed component can pass and the head cannot pass. Parts can be reliably supplied and held in the holding holes. The holding hole of the catcher has a shape that does not allow the shaft of the headed component to pass when the catcher is in the most closed state, so that the headed component supplied to the holding hole can be gripped. ing.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1 to FIG. 3, reference numeral 1 denotes an automatic screwing machine, which includes a driver base 4 slidable along a guide 3 arranged on a front surface of a base 2. The driver table 4 is connected to a rod 5a of a cylinder 5 disposed on the base 2, and is configured to be able to reciprocate upon receiving the operation of the cylinder 5. A work unit 8 including a motor 6 and a driver bit 7 that rotates by receiving the drive of the motor 6 is arranged on the driver table 4. The driver bit 7 of the working unit 8 is configured such that its tip can be engaged with a head of a headed screw which is an example of a headed part, and functions as a working tool for fastening the headed screw. I do.

On the other hand, a mounting plate 9 is guided by the guide 3 below the driver base 4. The mounting plate 9 is suspended by a connecting shaft 10 mounted on the driver base 4, and is normally urged downward by a spring 11 fitted on the connecting shaft 10. Further, a holding mechanism 12 for holding a headed component (hereinafter simply referred to as a holding mechanism 12) is attached to the mounting plate 9 in correspondence with the work unit 8. The holding mechanism 12 includes a guide sleeve 13 fixed to the mounting plate 9, a main body 14 fixed to the guide sleeve 13, and a pair of catchers 15 openably and closably disposed at the tip of the main body 14. , The main body 1
And a guide member 16 connected to the guide sleeve 4. The driver bit 7 is always located in the guide sleeve 13.

The main body 14 of the holding mechanism 12 has a tool guide path 14a for guiding the driver bit 7 and a first component guide path 14b inclined to communicate with the tool guide path 14a. A holding hole 15a is formed in the catcher 15 so as to communicate therewith, and a second component guide path 16a communicating with the first component guide path 14b is formed in the guide member 16. ing. The second component guide path 16a has a curved shape optimal for feeding a headed screw which has been obtained by adjusting a feed hose in the past, and the first component guide path is formed from the lower surface of the mounting plate 9. It is formed to extend to 14b.

A hose connector 17 is attached to the upper end of the guide member 16 through a second component guide path 16a. The hose connector 17 extends into a hole 9a formed in the mounting plate 9. , A feed hose 18 extending from an external screw supply device (not shown).

The catcher 15 is connected to a claw 19a of a parallel chuck 19 attached to the main body 14, and receives the operation of the parallel chuck 19 to open the opposing surfaces in parallel so as to uniformly increase the gap. Also, the main body 14 has
A cylinder 20 is mounted via a bracket, and a stopper 21 having a U-shape is connected to a rod of the cylinder 20. The stopper 21 receives the extension of the rod of the cylinder 20 and catches the catcher 15.
The movement of the catcher 15 is stopped halfway. The stopper 21 has a screw 21a at a portion to be engaged with the catcher 15, and the position at which the catcher 15 is stopped can be adjusted by turning the screw 21a to change the amount of protrusion to the catcher 15 side. It has become.

In the automatic screw tightening machine 1, when the screw tightening operation is performed, first, the cylinder 20 is operated to stop the stopper 21.
On the moving path of the catcher 15. Next, when the parallel chuck 19 is operated to expand the catcher 15 in parallel, as shown in FIG. 4A, the catcher 15 abuts the stopper 21 during the expansion and stops the expanding operation. At this time, the holding hole 15a of the catcher 15 is stopped so that the shaft of the headed screw can pass through and the head cannot pass through. In this state, when the headed screw is supplied from the screw supply device (not shown) by air pressure feeding, the headed screw is held in the catcher 15 from the second component guide path 16a through the first component guide path 14b. It is supplied to the hole 15a. At this time, since the catcher 15 is slightly expanded, the headed screw can smoothly and surely enter the holding hole 15a.
By adjusting the screwing amount of the screw 21a of the stopper 21, the position at which the expansion of the catcher 15 is stopped, that is, the opening degree of the catcher 15 can be changed, and various types such as different head diameters can be used. These can be satisfactorily supplied and held corresponding to the headed parts.

When the headed screw is supplied to the catcher 15 as described above, the parallel chuck 19 subsequently moves back to close the catcher 15 and grips the shaft of the headed screw, and at the same time, the cylinder 20 moves back. Then, the stopper 21 is retreated from the moving path of the catcher 15. Subsequently, the cylinder 5 operates to lower the driver base 4 and the mounting plate 9 integrally.
First, when the mounting plate 9 comes into contact with a stopper (not shown) or the like and stops at a predetermined position, the tip of the headed screw gripped by the catcher 15 at this time is inserted into the prepared hole of the work. In response to the stop of the mounting plate 9, the parallel chuck 19
Operates again to expand the catcher 15, but at this time, since the stopper 21 has already retreated, the catcher 15
Is fully opened so that the headed screw can pass through as shown in FIG. Therefore, the driver bit 7 which continues to fall
Can be rotated by driving the motor 6 to fasten the headed screw to the work.

In the embodiment of the present invention, a headed screw is taken as an example of a headed part and an automatic screw tightening machine for tightening the headed part to a work has been described. The holding mechanism can be applied to an apparatus for handling headed parts such as a rivet swaging machine for caulking rivets, and the same effect can be obtained by applying to an apparatus for handling such headed parts.

[0014]

As described above, in the headed component holding mechanism of the present invention, when a headed component such as a headed screw is supplied, the head of the headed component cannot pass through and the headed component cannot be passed. The catcher can be slightly opened so that the shaft part of the catcher can pass, the headed parts can be reliably supplied to and held by the catcher, and the opening of the catcher can be adjusted by adjusting the stopper. There is an advantage that they can be supplied and held without any trouble in response to various types of headed parts. Further, since the catcher moves in parallel and opens and closes, there is an advantage that the catcher can be stopped at a predetermined opening degree without strictly setting the advance position of the stopper. Furthermore, since the operation of the catcher is based on the operation of the parallel chuck, it is possible to hold the headed component to be used for the next operation immediately after the operation is completed.

[Brief description of the drawings]

FIG. 1 is an enlarged bottom view in which a part of an automatic screwing machine provided with a headed component holding mechanism according to the present invention is partially cut away.

FIG. 2 is a front view of an automatic screwdriver provided with a headed component holding mechanism according to the present invention.

FIG. 3 is an enlarged partial cutaway sectional view of a main part of an automatic screwing machine having a headed component holding mechanism according to the present invention.

FIG. 4 is an operation explanatory view of an automatic screw tightening machine having a headed component holding mechanism according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automatic screwdriver 4 Driver stand 5 Cylinder 6 Motor 7 Driver bit 8 Working unit 9 Mounting plate 12 Holding mechanism of headed parts 14 Main body part 14a Tool guide path 14b First component guide path 15 Catcher 15a Holding hole 16 Guide member 16a Second component guideway 19 Parallel chuck 20 Cylinder 21 Stopper 21a Screw

Claims (3)

[Claims] 1. A holding mechanism for temporarily holding a headed component supplied from a component supply device in front of a work unit, a tool guide path capable of guiding a work tool of the work unit, and a supplied headed component. A pair of catchers, each of which is formed at the tip of the main body portion and has a holding hole capable of holding a headed component to be fed through the component guide path, and a pair of catchers; Opening / closing means for opening and closing when a headed component is sent from the component supply device; and opening and closing of the catcher at the time of expansion when the headed component is supplied from the component supply device and protrudes onto the expanding movement path of the catcher. A holding mechanism for a headed part, comprising: a stopper capable of adjusting a degree. 2. The stopper according to claim 1, wherein the holding hole protrudes so as to stop the catcher at a position where the holding hole is formed so that the shaft of the headed component can pass therethrough and the head cannot pass therethrough. A mechanism for holding headed parts. 3. The catcher according to claim 1, wherein the holding hole of the catcher is formed so as not to pass through the shaft of the headed component when the catcher is in the most closed state. A mechanism for holding headed parts.