JP3087603U - Screw feeder for automatic screw tightening machine - Google Patents

Abstract

(57) [Summary] (Modifications) [PROBLEMS] In an automatic screw tightening machine that provides a screw material and fastens with a predetermined torque, the lower end of a hollow vertical pipe is adsorbed at the screw tightening head position and simultaneously pushed from below. The present invention provides an automatic screwing machine that ensures biting by pushing up a screw material. A bis material separately from the outlet portion of the line feeder screws material S _{3 1} or the foremost portion carrying grabbed by open chuck pieces to screwing head position directly below the drive bit 20 from the feeder outlet portion conveyor The hollow vertical pipe 10 is attached to the screw material which is held by the chuck piece 42 at the screwing head position (b) at the device and the screw material transfer position.
Is pressed down from above to hold the head of the screw at the fitting inlet at the lower end thereof, and at the same time, push up the screw from below to push the cutting head 17 of the screw so as to bite the tip of the bit. It comprises a lifting device 16 provided.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an automatic screw tightening machine that automatically supplies a screw material to parts that require screw tightening and tightens it at a specified torque, and in particular, tightens screws from a line feeder during the screw tightening process of the automatic screw tightening machine. It relates to means for transporting and supplying screw material to the head.

[0002]

[Prior art]

 2. Description of the Related Art An automatic screwing machine in which a screw material is taken out one by one from a line feeder and supplied to a screw tightening head so as to be automatically tightened at a predetermined torque by a drive bit has been generally known.

[0003]

[Problems to be solved by the invention]

 In such a conventional screw tightening machine, when it is sent out from a line feeder, the screw material facing the frontmost outlet is gripped by a left-right opening / closing type chuck, and is conveyed to the lower end of the hollow vertical pipe by moving the cylinder. The screw material is sucked so that it bites into the drive pit, but the operation to carry the screw material from the outlet to the screw tightening head position is unstable, the suction is insufficient, and the screw material tilts or jumps. There was a problem that it was unavoidable to cause defects.

[0004] Therefore, the object of the present invention is that when the screw material is sent out from the line feeder to the foremost outlet, it is transported while securing the position, and is adsorbed to the lower end opening of the hollow vertical pipe at the screwing head position. At the same time, push up the screw material from below with a push rod to ensure biting and secure the automatic fastening of the screw material with a simple configuration, and to provide a highly accurate and cost-effective automatic screw tightening machine. It is in.

[0005]

[Means for Solving the Problems]

 The technical means of the present invention for solving the above-mentioned problems is a hollow vertical tube 10 for adsorbing a screw material, which is supported so as to be able to move up and down and has a screw material inlet 11 at the lower end, and a hollow interior of the hollow vertical tube 10. A screw drive bit 20 internally held rotatably and vertically movably so that the tip of the bit faces the screw material insertion port 11 at the lower end of the hollow vertical tube 10, and a screw material are arranged side by side to the outlet 31 at the tip in a sequential feed. A line feeder 30 for continuously transferring screw material and one screw material at the forefront from the outlet 31 of the line feeder 30 are cut off and opened and closed to the screw head position immediately below the drive bit 20 from the feeder outlet 31. A screw material transporting device 40 for gripping and transporting by a possible chuck piece 42 and a screw material in a state of being gripped by a chuck piece at a screwing head position at the screw material transporting position, The hollow vertical pipe 10 descends from above and holds the head of the screw material by suction at the fitting inlet 11 at the lower end thereof, and at the same time, pushes up the screw material from below to push the cut of the head of the screw material into the bit tip. It is constituted by a push-up device 16 having a push rod 15 that moves.

According to the present invention, by adopting such a configuration, the screw material sent from the line feeder is separated from the outlet portion and a stable posture is ensured while being carried to the screw tightening head position. As soon as it reaches the screw tightening head position, it is pushed by the push-up rod to ensure the bite of the drive bit. This makes it possible to completely eliminate defects such as defective screw tightening and empty tightening.

The second technical means of the present invention is to screw the screw conveying device 40 having the chuck piece 42 and the push-up device 16 having the push rod 15 to the outlet 31 of the line feeder 30 by screwing. That is, it is provided on a slide body 41 that slides between head positions.

According to the present invention, with such a configuration, the screw material transporting device and the push-up device cooperate with the slide body to operate with good timing, and perform efficient screw tightening with lean movement. Work can be performed.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

[0010]

【Example】

 1 to 3 show the automatic screw tightening machine of the present invention as an example. FIG. 1 is a side view of the entire screw tightening machine. FIG. 2 is an enlarged plan view of a screw material conveying device, FIG. FIG. 4 is an explanatory diagram of the operation of the lifting device.

In FIG. 1, a hollow vertical tube 10 and a drive bit 20 inserted in the hollow vertical tube are held by an elevator 3 provided on the body 1 along a guide 2, and move up and down together with the elevator 3. It has become. The elevating platform 3 is driven by a cylinder 4 mounted downward on the upper part of the body 1 so as to move up and down.

The drive bit 20 is driven by the drive motor 5 installed on the lift 3 through the upper end of the hollow vertical pipe 10.

The screw material transporting line feeder 30 receives and removes from the rear in a swinging manner by the rotation and vibration of the drum 6 containing a large number of screw materials S and sequentially aligns them in a line toward the outlet 31 at the tip. As shown in FIG. 2, the screw material transfer device 40 is installed so as to be inclined with respect to the transfer direction (the front-back direction when viewed from the front).

The screw conveying device 40 and the push-up device 16 having the push rod 15 are provided on a slide body 41.

The slide body 41 is provided at its front end with a chuck piece 42 urged by a spring 51 so as to open and close with a pivot 47 as a fulcrum, and between the chuck piece 42 and the end of the slide body 41. It has a concave screw receiving portion 43.44.

The lifting device 16 is constructed by incorporating an air cylinder 18 into a bracket 17 provided so as to branch downward from a slide body 41, and the pushing rod 15 is moved up and down by the operation of the air cylinder 18. It is. The push rod 15 is set upward at a position directly opposite to the screw receiving portions 43 and 44 of the chuck piece 42.

The screw receiving portion 44 of the chuck piece 42 has a locking step portion 48 with which a lower end portion is engaged when the hollow vertical tube 10 descends. In addition, the chuck piece 42 has a locking claw 45 which operates so as to be able to protrude and retract so that the toe faces the screw receiving portion 43. The locking claw 45 is locked under the neck of the screw material to hold the screw material fitted to the screw receiving portions 43 and 44 at three points so that the screw material does not fall off during sliding. Lock.

[0018]

[Action]

 The screw members S spouted from the drum 6 are sent out one by one from the rear of the line feeder 30 while being aligned vertically in a state of being fitted into and supported by the vertically dividing grooves 32. The screw material S '(black circle in FIG. 2) at the outlet 31 at the end of the line feeder 30 is sandwiched between screw receiving portions 43 and 44 between the end of the slide body 41 and the chuck piece 42. Individual screw material is retained. With this state as the starting position (a), the slide body 41 slides from (a) to the screw tightening head position (b). With the start of the slide of the slide body 41, the screw material of the screw receiving portion is separated from the outlet portion 31 of the line feeder. Transfer from (a) to (b) and stop at (b). At this time, the hollow vertical pipe 10 descends from above, and the screw material S 'is inserted into the screw insertion port 11 at the lower end thereof and is sucked. At the same time, the push rod 17 of the push-up device 16 rises from below and pushes up the lower end of the screw S 'at the upper end. For this reason, the screw material is strongly engaged so that the notch groove in the screw material head bites into the tip end 21 of the drive bit 20 by the application of pressure from both upper and lower sides.

When the biting of the bit 20 is completed, the slide body 41 returns to the original starting position (a) while the hollow vertical pipe 10 maintains its lowered position. At this time, the chuck piece 42 is locked at the lower end portion of the hollow vertical tube 10 and is prevented from moving in the return direction, so that the chuck piece 42 has the pivot 51 as a fulcrum, as shown by the chain line in FIG. Since it is returned while being opened against the spring pressure, the engagement with the hollow vertical pipe 10 is released and the pipe is returned. The position (b) becomes blank again by the return of the slide body 41 and the chuck piece 42, so that the drive bit 20 moves down together with the hollow vertical tube 10, and the screw material S ′ is further lowered and rotated by the bit 20. Screw it into the screw hole of the work and fasten it with the specified torque to complete a series of screw tightening operations.

[0020]

[Effect of the invention]

 Since the present invention has the structure described in claim 1, when one screw material is gripped by the chuck by the slide of the slide body and transported from the starting position (a) to the screwing head position (b). Further, at this position, the push rod 15 at the push-up position moves upward from below with respect to the hollow vertical pipe to push up the screw material, so that the drive bit is effectively bitten and quickly and reliably. Transfer and supply are performed, and it is possible to completely eliminate problems such as dropping due to mis-grabbing, empty feeding, and poor screw tightening.

Further, since the push-up device moves between the starting position (a) and the screw tightening head position (b) in coordination with the slide body, the push-up device has the structure described in claim 2. The lifting device does not get in the way and its function can be fully demonstrated.

[Brief description of the drawings]

FIG. 1 is a side view of one embodiment of a screw material supply device of the automatic screw tightening machine of the present invention.

FIG. 2 is an enlarged view showing a screw material supply and transfer device, and is a plan view seen from the front.

FIG. 3 is a side view of the screw material supply and transfer device, showing an operating state.

FIG. 4 is a side view of the same.

FIG. 5 is a front view of the same.

[Explanation of symbols]

 Reference Signs List 10 hollow vertical pipe 11 screw material insertion port 16 push-up device 17 push rod 20 drive bit 30 line feeder 31 outlet part 40 screw material transfer device 41 slide body 42 chuck piece S. S 'Screw material a Starter b Screw head position

Claims (2)

[Utility model registration claims] A hollow vertical pipe (1) for adsorbing a screw material, which is supported so as to be able to move up and down and has a screw material inlet (11) at its lower end.
0) and a screw tightening mechanism that is rotatably and vertically movable inside the hollow vertical tube (10) such that the tip of the bit faces the screw material inlet (11) at the lower end of the hollow vertical tube (10). , A screw feed line feeder (30) for continuously arranging the screw material and sequentially feeding the screw material to the outlet (31) at the tip, and the outlet (31) of the line feeder (30). A screw material transporting device (4) that cuts off one foremost screw material and grips and transports it with a chuck piece (42) that can be opened and closed from a feeder outlet (31) to a screw tightening head position immediately below a drive bit (20).
0) and the screw material gripped by the chuck piece at the screwing head position at the screw material transfer position, and a hollow vertical tube (1)
0) is lowered from above to hold the head of the screw material in the fitting inlet (11) at the lower end thereof, and at the same time, pushes up the screw material from below to push the head cut of the screw material to the bit tip. Pushing device (1) having a moving push rod (15)
6) A screw material supply device for an automatic screwing machine, comprising: 2. A screw feeder (40) having a chuck piece (42) and a lifting device (16) having a push rod (15) are connected to an outlet (3) of a line feeder (30).
2. A screw material supply device for an automatic screwing machine according to claim 1, wherein said screw member feeding device is provided on a slide body (41) which slides between 1) and a screwing head position.