JPS6017666B2 - Automatic screwdriver fastener parts feeding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention uses screws, bolts, etc. to fasten a fastener part consisting of a head and a leg part by a predetermined amount with the leg part first, and arrange the fastener parts in a line using the tip of an automatic screwdriver. This invention relates to a fastener parts supply device that separately supplies the fastener parts to the chuck unit one by one in an automatic driver that supplies V to a chuck unit and attaches the parts to a workpiece.

Portable automatic screwdriver that has been commonly used for a long time
There are various types of devices, but most of them have a parts supply device that separates and supplies fastener parts such as screws or bolts one by one, and is placed in a separate position from the automatic screwdriver. Currently, a hose is used to connect the supply mechanism to the automatic screwdriver, and each fastener part is supplied with pressurized air from the parts supply system to the chuck unit of the automatic screwdriver. .

Therefore, conventional movable automatic screwdrivers have good workability for positional forgery work, but for mobile work such as attaching screws etc. in the cabin of a car that is moved by a conveyor. Since the hose and electric wire must be routed around, there are problems in terms of workability and safety. For this reason, the general feature of a movable automatic screwdriver, which allows the operator to freely move the automatic screwdriver up to the part attachment hole of the workpiece and vertically attach it, has not been fully exploited. Hakama Sekisho 5 was devised with this in mind.
There is a cassette type portable mechanical movement as described in Publication No. 1-14280. This system has a cassette loaded with a large number of screws that can be inserted into and removed from the case of a self-adjustable screw tightening device, and the cassette-up screws are delivered to the screw tightening head in synchronization with the screw tightening process. However, since the cassette has a structure similar to, for example, a rotating magazine for a gun, and a screw is loaded into it, this Fujizukuri becomes complicated and becomes larger as a whole. At the same time, since the amount of crabs is excessive, if a worker carries this with him, there are problems such as poor workability and severe fatigue of the worker. The present invention has been proposed in view of these problems, with the aim of providing a rock-mounted automatic screwdriver that is small, lightweight, and easy to operate.One embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view of the automatic screwdriver of the present invention, which is a driver main body that incorporates a rotational drive source (not shown) that acts to vertically attach an external screw to a workpiece.

A grip part 2 having a trigger 2a for giving a start signal to a rotational disturbance source is fixed to this driver body 1, and an outer cylinder 3 is fixed to the driver body 1. This outer section 3 has an inner tube 4 inserted therein so as to be able to slide back and forth,
A nose 10 is attached to the tip of this inner cylinder C.
Further, as shown in FIG. 2, a drive koji 5 is arranged on the center line of the inner cylinder 4 and is rotatably driven by the rotational drive source. A bit S having a tip shape that can be engaged with is attached. The tip of this bit 6 is Zos 10 before the attachment work.
'The center line of the drilled guide hole OA and the supply hole 1 described below.
It is located behind the Y-shaped intersection with the center twill of 8b. A supply pipe 10b' is drilled diagonally toward the guide hole 10a of the nose 18, and a single supply pipe is fixed thereto.
Further, on the nose turtle G, a pair of jaws 12 whose tips are symmetrically opposed to each other across the center line of the driver and which hold a screw 50 at the tips are pivotably supported on a horizontal plane, respectively. The jaws 12 of the nose IQ and the pair of jaws 12 constitute a chuck unit A. Also nose 1
0' This is the screw 5 supplied to these pair of jaws 2.
In order to prevent the reverse flow of 0, a non-return claw turtle 3 whose tip approaches the face of the head of the screw 50 is attached to be able to swing freely around the claw piso turtle 4. The tip is constantly biased by the claw spring 15 so that the tip protrudes inward.
Furthermore, a screw 50 is provided at the tip of the inner segment 4 in parallel thereto.
A cylindrical member 28, as shown in FIGS. 2 and 3, having a component passage 21a for aligning and guiding the parts in a line is fixed so as to embrace the inner range 4. The second part of pipe 11 has been carried in.

In the cylindrical portion 23 of the cylindrical member 20, one ball 23a, 23a, which can project into the component passage 21a with a visibility of i' in diameter, is arranged at a predetermined interval in the chest direction. In this embodiment, one ball 23 is placed at a predetermined interval in all directions of the axis of the second cylinder part.
a, 23b are arranged, but two or three may be arranged at equal intervals on the same circumference of the light at a predetermined interval in the direction of the ball. Also, the maximum distance between the balls 23a and 23b is such that when the front ball 23a locks the seat surface of the first screw 50, the rear ball 23M should be located in front of the seat surface of the next screw 58. . As shown in FIG. 4, a sleeve 24 is provided on the outer circumferential surface of the second cylindrical portion and is slidable back and forth in the axial direction.
The sleeve 24 is prevented from moving rearward by a blocking portion 25 attached to the cylindrical portion 211. The balls 238, 23b are provided on the inner peripheral surface of the sleeve 24.
The arcuate grooves 24a and h to allow the ball to escape outward are spaced apart in the direction of the ball and are formed parallel to each other in the circumferential direction.
The distance between 8a and 23b is slightly wider than that between 8a and 23b. this ball 2
3a and 23b are configured to alternately protrude into the component passage 28a as the sleeve crab 4 moves back and forth. 23a can be moved freely. Also, a pressurized air passage 24c is formed in the circumferential direction of the circumferential surface between the arcuate grooves 24a and 24b of the sleeve 2&.
This air passage 21c is connected to a connecting portion 24e to which one end of the air filter 7 is connected via a communication hole 24d.

This sleeve 24 is always biased rearward by a spring 26 hidden between it and the collar 22 at the tip of the cylindrical member 20, and the front ball 23a can move freely while the rear ball 23b can move freely. protrude in one direction. As shown in FIGS. 2 and 3, the sleeve 24 is provided with a pin 27 whose tip protrudes toward the center line of the driver, and the tip of this pin 27 is formed at the tip of the outer cylinder 3. Outer weave 3 in working groove 3a
During this forward movement, the sleeve 24 is engaged with the working groove 3a and is pressed against the collar portion 22 against the spring 26, and at this time, the front ball 23
The ball a protrudes inward, and the rear ball 23b enters the arcuate register 24b of the sleeve 24 and is a free sardine. Further, the sleeve 24 is formed on the outer periphery of the cylindrical portion 21 of the cylindrical member 20.
A compressed air passage 21b is formed in the circumferential direction to guide the air in cooperation with the compressed air passage 24c.
is passed through the component passage 21a of the cylindrical member 20 through a small hole 21c cut obliquely toward the front. Next, a parts storage cylinder 30 for storing a large number of screws 50 arranged in a row with the legs first is detachably attached to the rear part of the cylindrical member 20, as shown in FIG. Section 3
The tip end of the cylindrical member 20 can be attached to the rear end of the cylindrical member 20.

That is, the rear end of the cylindrical member 20 is formed with an annular groove 21d in which the annular projection 31 at the tip of the storage tube 30 engages, and the tip of the storage tube 30 has four grooves in the sea bream direction so as to have elasticity. A strip slit 32 is formed. As shown in FIGS. 2 and 3, this parts storage rod 301 has a pusher member 33 inserted therein that can be slid back and forth, and this pusher member 33 is pushed forward by a built-in spring 34. It is energized when powdered. The free length of this spring 34 is
The length is such that the screw 50 immediately in front of No. 3 can be pushed out from the storage cylinder 30. Further, an air cutoff valve 40 is attached to the tip of the outer cylinder 3 for quickly cutting off the pressurized air supplied into the component circuit 21a of the cylindrical member 28, and the inlet of this air cutoff valve 40 is shown in FIG. The other end of an air pipe 8, which receives pressurized air from a compressed air source (not shown) and has one end connected to an air branch circuit (not shown) in the unit 2, is connected to the turtle oa.

Further, the sleeve 24 is located at the outlet 40b of the air cutoff valve 40.
The end of the air pipe 7, one end of which is connected to the compressed air path 24c, is connected. Further, guide grooves 4a and 4b are formed in the outer circumferential surface of the inner cylinder 4 in the direction of the circumference to provide the operation of the switch village 411 of the air cutoff valve 40, and between the groove 4a and the groove b, A protrusion 4c is formed, and pressurized air is supplied into the component circuit 21a only while the switch punch 41 of the air cutoff valve 40 fixed to the outer cylinder 3 rides on the protrusion 4c. Next, the operation of this embodiment will be explained.

As shown in FIG. 2, when the screw 50 passes through the supply V supply pipe 11 and the supply V supply hole 10b and is supplied with the leg portion first, the screw 50 pushes aside the non-return pawl i3 and passes through. , held by the jaws 12. In this state, bring the tip of the screwdriver close to the workpiece 601 and use the tip of the leg of the screw 50 to locate the vertical hole in the workpiece.After aligning this hole position with the tip of the leg of the screw 50, remove the screwdriver. When pressed against the workpiece, the nose 10 and the inner cylinder 4 are prevented from advancing due to the engagement between the screw 60 and the non-return claw 13, but the outer cylinder 3 moves on the outer peripheral surface of the inner cylinder 4 in the mari direction. In order to move forward while moving forward, the bit 6 moves forward within the guide hole 10a of the /zu turtle 0. During this operation, the switch village 41 of the air cutoff valve 40 fixed to the outer tube 3 rides on the protrusion 4c from the guide foundation 4b of the inner tube 4, and the cutoff valve 40
operates and becomes open, and pressurized air is temporarily supplied into the component passage 21a of the cylindrical member 20, so the trigger 2a is activated during this forward movement in which the screw 58' is securely held within the jaw 12. Then, the start signal of the rotational disturbance source is input, and the bit 6' pushes aside the non-return pawl 3 and reaches the head of the screw 58 while rotating, and the tip of the bit 6 meets the cross-shaped end of the head of the screw 50. .

In this way, the screw 50 starts rotating integrally with the bit 6, so the screw 50 is attached to the workpiece 6 as shown in FIG.
01 is attached vertically. Immediately before the end of this operation, the working groove 3a of the outer cylinder 3 engages with the pin 231 provided in the sleeve 24, and the sleeve 24 is pushed against the spring 26 into the cylindrical member.
Since the front ball 23a is moved so as to come into contact with the collar 22 of
3b' Now free sardine is possible. As a result, the screw 50', which had been prevented from advancing by the rear ball 23b, moves forward by the action of the spring 34 of the parts storage tube 30 until the head seat is locked with the front ball 23a. After completing the vertical screw installation work in this way, when the rotational drive source is stopped and the driver is moved backwards, the outer cylinder 3 and the inner cylinder tortoise return to the state before the vertical installation work, and the bit 6 is also returned to its original position. When this return operation is started, the outer section 3 causes the collar portion 2 of the cylindrical member 20 to
The sleeve 24 that was pressed against the spring 26
As a result, the front ball 23a is allowed to move freely again until it hits the blocking member 26, and the rear ball 23b is projected inward and is prevented from advancing further by the next screw 58' and the ball 23M. Then, the outer vertical 3 and the inner chest 4 continue to move relative to each other, and the switch 1 of the air cutoff valve turtle 0 fixed to the outer cylinder 3 moves from the guide turtle a to the protrusion c.
operates and becomes a channel as shown in Fig. 6, and the air is again passed through the air pipe 7 and air foundations 24c and 24d, and is supplied from the small hole 2 c to the parts passing machine a, and then to the screw 589 at the end. After that, the switch 4 enters the guide book 4b, so the supply of pressurized air is cut off as shown in FIG. 5, and the screw tightening work cycle is completed. As is clear from the embodiments described above, the present invention has two cylindrical members each having a parts passage 21a for receiving and guiding fastener parts such as screws or bolts arranged in a row. Balls 23 to 23b that can be projected to
At least one piece is distributed at a predetermined interval in the direction of the koji, and at least one piece is equally spaced on the same circumference of the cylindrical member 20. A spring 26 is disposed between the collar 22 of the cylindrical portion 2Q and the sleeve 2 to constantly bias the sleeve 24 in one direction, and the inner peripheral surface of the sleeve 24 is The balls 28a are arranged at predetermined intervals on the cylindrical member 20'. Two arcuate grooves 23a, 2 are formed in the circumferential direction with a spacing in the koji direction slightly wider than the spacing of 23b.
4b, and this sleeve 241 is provided with a pin 27.
and an outer part 3 which is movable relative to the inner cylinder 4, moves integrally with the bit 6 of the automatic screwdriver, and has an action lever 3a formed at its tip that can be connected to the pin 27 mentioned above. A means is provided so that the sleeve 24 is moved in synchronization with the vertical attachment work by means of this action means, and the fastener parts are separated one by one.

For this reason, this system, which separates and supplies fastener parts to the chuck unit for each work cycle, improves work efficiency and has an extremely simple and compact structure compared to the cassette system, which has the same purpose.

Furthermore, when this is attached to a movable automatic screwdriver, there is no need for a separate fastener parts supply diamond like in the case of a follower.
In addition, since it is small and lightweight, it has significant effects such as improved operability and workability of the automatic screwdriver, reduced worker fatigue, and extremely ease of use. Although the above embodiment described a movable automatic screwdriver, L
Even when this is used in a stationary automatic screwdriver, it has similar effects.

A simple view of the drawings is a perspective view of an automatic screwdriver using the present invention. Figures 3 and 3 are a sectional front view of the main parts showing the operation of the automatic screwdriver, and Figure 4 is a front view of the main parts of the invention. The enlarged plan view and FIGS. 5 and 6 are enlarged sectional side views showing the operation of the air cutoff valve and the operating means.

A is the chuck unit; 1 is the driver body; 2 is the grip; 28 is the trigger; 3 is the outer cylinder; Department
Flea drive shaft t 61 bit 7, air pipe, wealth Q'ma nose `` Flea 2 is jaw '' Wing 35 check claw `` 2 river cylindrical member `` 2 river cylindrical part ~ 2 turtle a is the parts passage ``Dew 2 is the brim'' 23a, sky 3b is the ball 2
W sleeve, 24a, 24b are arc grooves, 25 is blocking part village, 26 is spring, 271 is pin, 36 is parts storage cylinder, S2 is slit, 33 is pushing part village, 34 is spring, turtle Q' or Air cutoff valve ``Turtle 1 likes the switch.
505 external screw 68' Work Q Fig. 1 Fig. 2 Fig. 3 Fig. 4 Fig. 5 Fig. 6

Claims (1)

[Scope of Claims] 1. In an automatic driver that supplies a predetermined amount of fastener parts arranged in a line with the legs first to a chuck unit at the tip of the driver and tightens them onto a workpiece, the fastener parts arranged in a line are A cylindrical member 20 having a parts passage 21a for receiving and guiding parts and in which balls 23a and 23b that can project into the parts passage 21a are arranged at a predetermined interval in the axial direction, and an outer periphery of this cylindrical member 20. The balls 23a, 23b are capable of sliding back and forth on the surface in the axial direction and are constantly adjusted in one direction by a spring 26.
It consists of a sleeve 24 that alternately protrudes into the component passage 21a of the cylindrical member 20, and an action means that moves this sleeve 24 in synchronization with the tightening operation of the bit 6 of the automatic screwdriver. A fastener parts supply device characterized in that the fastener parts are separated and fed one by one in synchronization with the tightening operation. 2. The fastener according to claim 1, wherein the sleeve has two arcuate grooves 24a and 24b spaced apart in the axial direction and formed in the circumferential direction on the inner peripheral surface of the sleeve. Parts feeding device. 3. The fastener component supply device according to claim 1 or 2, wherein the spring is disposed between the collar portion 22 of the cylindrical member 20 and the sleeve 24. 4. The operating means consists of a pin 27 implanted in the sleeve 24 and an outer cylinder 3 which is movable relative to the inner cylinder 4 to which the chuck unit A is fixed and which has an operating groove 3a formed at its tip. The fastener component supply device according to claim 1, 2, or 3, wherein the working groove 3a engages with the pin 27 to advance the sleeve 24 during advancement.