JPH08192371A - Method and device for supplying screw - Google Patents

Abstract

PURPOSE: To provide a screw supplying means, in which a power source for delivering a screw from a cassette to a unit main body assembled to an automatic driver and for carrying the screw to a chuck part of the tip inside of the unit main body is eliminated. CONSTITUTION: The predetermined number of screws 5 are arranged in a vertical line for housing in a cassette 30, which has a bar groove having a rail part for locking the seat surface of a screw head so as to suspend it in a vertical line and a covering bar for hindering the loose-out of the screw toward the over and which can be connected to a chute of a screw supplying unit. On the other hand, the bar groove as a screw guide chute 29 continued to a chuck part 26 of the tip, which suspends the screws 5 in a vertical line so as to prevent the loose-out thereof, is held in the inclined posture by the main body unit 23 to be assembled to an outer cylinder 25 of the tip of an automatic driver. The cassette 30 is fitted to the main body unit 30 in the inclining posture freely to be disconnected, and the screw 5 is delivered to the screw guide chute 29 by the weight of one screw through an escape mechanism 38 per each fastening work cycle, and the screw 5 is slid for automatic supply to the chuck part 26 of the tip of the driver by the only weight thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw supplying method and a screw supplying device for automatically supplying a screw to a driver tip for each tightening work cycle from a cassette in which a predetermined amount of screws to be mounted on an automatic driver are stored.

[0002]

2. Description of the Related Art Screws are tightened on a workpiece by attaching a screw to a driver, but if this is attached by hand, in the case of a right-handed person, usually a large number of loose screws are held in the left hand at the tip of the driver in the right hand. Installing. However, in this case, (1) since the screws cannot be held in the left hand in an aligned state, workability is poor, and considerable skill is required to obtain workability. (2) Since the left hand holds the screw, the left hand is blocked and it is not possible to press the work etc. (The driver rotates and swings the work). As a result, a jig for fixing the work is required, which is costly. (3) I am tired because I always hold a large number of screws with my left hand. There is a problem such as.

Therefore, if the screws are previously aligned with a screw dish or a screw feeder and the screw is picked up with the right hand holding the screwdriver, and then the screwdriver is carried to the work to perform the screw tightening work, it becomes a manual work. Compared with the left hand, the work can be held by hand. There are merits such as easy installation of screws, but in this case, (1) Workability is still lacking because the number of steps to take is larger than the work time to actually tighten the screws. (2) To work while constantly moving the driver,
I get tired. (3) The screw tray or screw feeder must always be placed within the reach of the worker, which takes up the work space.

A screw feeder for aligning the above-mentioned screws in a fixed posture is widely known, for example, in Japanese Patent Publication No. 4-35306, and the screw head is locked in a stock case equipped with a dipper. An inclined chute having a slit for suspending the screw shaft portion is connected, and a stopper and a bit guide are provided at the tip of the chute. As a means for automatically supplying one screw per tightening work cycle to the tip of the automatic driver where the work of attaching screws to the automatic driver can be omitted and only the tightening work can be concentrated, various methods have been conventionally used. I have a suggestion. A typical example is a feed mat (trade name).
This is to mechanically separate the screws coming out after being aligned by using power such as pneumatic pressure, and feed them to the tip of a special driver by pneumatic conveyance.

However, in the case of this, (1) the cost is several tens of times as high as the cost when the screw aligner, which is expensive, is used. (2) An air supply source (compressor) is necessary for pressure-feeding with air. (3) Accessories such as hoses increase and work space is lost. (4) It is necessary to match the hose diameter with the screw head diameter, which is specialized for the type of screw and poor in compatibility. (5) Noisy because it is fed by air. (6) Poor maintainability due to the need for complicated mechanical parts. There is a problem such as.

On the other hand, as a solution to the inconvenience caused by pneumatically feeding the screws from the above-mentioned separated position, the aligned screws are preliminarily waited near the automatic driver,
There is a type of proposal that the driver is delivered to each driver in each tightening work cycle. That is, for example, in the one disclosed in Japanese Utility Model Laid-Open No. 56-176174, as shown in FIG. 13, a screw supporting cylinder 3 having a driver 2 insertion hole on the axis of the automatic driver 2 is attached to the driver body 1. , The tape 4 on which the introduction passages for the tape 4 and the screw 5 are formed in the support cylinder 3 at right angles to the axis of the automatic driver 2 and the screws 5 are mounted at intervals so that the screw 5 can be freely pushed out.
Is extended from the storage case 6 that is integrally assembled to the driver body 1. As the same type, Japanese Utility Model Laid-Open No. 57-181574 and JP-A-2-23
There is No. 2178.

Further, in the one disclosed in Japanese Patent Laid-Open No. 5-104456, as shown in FIG. 14, the above-mentioned storage case 6 is not integrated with the driver main body 1 but separated, and an attached guide 7 is provided. Trying to introduce the tape 4 via. As the same type, there is Jitsukaihei 2-145972. Further, in the one disclosed in Japanese Patent Laid-Open No. 3-73278, as shown in FIG. 15, mounting holes for accommodating one screw 5 are attached to a holder block 8 arranged at an equal pitch, and a holding guide for this is provided. The member 9 is attached to the tip of the driver body 1 and is fed to the tip of the driver 2 one by one. As the same type, there are JP-A-51-142800 and JP-A-57-21279.

However, in the case where the above-mentioned screw 5 is attached to the tape 4 or the holder block 8, the attachment cost is equal to or more than the unit price of the screw, and it is not practical and it is fed out. Due to the attachment of the drive mechanism, there is a problem that it becomes complicated and large and workability is deteriorated. The above-mentioned disadvantage of the mounting cost is provided in Japanese Utility Model Laid-Open No. 186270/1982. This is a proposal of the simplest form of the storage cylinder in which the screws are aligned and stored in a row with the legs first. As shown in FIGS. 16 to 17, in the parts of the storage cylinder 57, 10 is the storage cylinder 5.
7 is a reciprocating push member, and a spring 12 for constantly urging the push member 10 forward is built in between the push member 10 and the plug 11 at the rear end of the storage cylinder 57. The free length of the spring 12 is such that the screw 5 immediately before the pushing member 10 can be pushed out from the storage cylinder 57.

Also, one end of a string body 13 for moving the pushing member 10 backward against the spring 12 is locked, and the other end of the string body 13 is connected to the spring 12 and the plug 1.
1 to reach the rear side, and the string body 13 has a length sufficient to extend rearward from the plug 11 even when the pushing member 10 is most advanced. An engaging groove 14 is formed on the outer periphery of the pushing member 10, and the pushing member 10 is accommodated in the storage cylinder 5.
7, the engaging hole 15 is provided facing the engaging groove 14 at the rearmost position, and the pushing member 10 is formed in the engaging hole 15 and the engaging groove 14. Figure 17 to fit
It is locked by the blocking member 16 shown in FIG. Further storage cylinder 57
A stop claw 19 urged by a ring spring 18 so as to project inward from two slits 17 facing each other is pivotally supported at the tip of each of them so that the stop claw 19 can be stored. The head of the screw 5 is pushed forward from the tip of the cylinder 57 so that the screw 5 can be pushed outward when stored.
Is formed so as to lock the screw head seat surface when the leg is pushed out from the housing cylinder 57 first.

On the other hand, as shown in FIG. 16, the tip of the driver body 1 has a nose 2 which constitutes a chuck unit A.
0 is assembled, and a cylinder member 21 constituting a separate supply unit B for separately supplying a screw for each tightening work of an automatic driver is held and fixed to the nose 20 and the cylinder at a position slightly rearward. The member 21 is connected to the member 21 by a supply pipe 22. Although not shown in the drawings, the screw 5
The air pipe from the compressor for pumping is connected.

The storage cylinder 57 is detachably attached to the cylindrical portion 21a of the cylindrical member 21. As shown in FIG. 17, the screw 5 is attached to the storage cylinder 57 by pulling the pushing member 10 in the storage cylinder 57 backward with the string body 13 against the spring 12 in advance to engage the engagement groove 14 and the engagement hole. 1
5, the blocking member 16 is fitted and the pushing member 1
0, and then screw 1 from the tip of the storage cylinder 57.
Supply a specified amount, starting with the head of the circle. At the time of this supply, the stop claw 19 is pushed away by the screw 5 against the ring spring 18. Further, this screw supply operation may be performed by a separate supply device (not shown) for automatic supply of a predetermined amount or manual supply by an operator.
In this way, when the screws 5 are aligned and stored in the storage cylinder 57 in a line, the blocking member 16 fitted in the engagement groove 14 of the rear pushing member 10 and the engagement hole 15 of the storage cylinder 57 is removed. Although the pressing force of the spring 12 is applied to the spring 5, the seating surface of the frontmost screw 5 stops and is locked by the claw 19 to be in a forward or blocked state.

Since the screw 5 is received by the blind claw 19, the screw 5 slips out of the storage cylinder 57 or the blind claw 1
The spring 12 prevents the screw 5 from jumping out by the time 9 is released. Furthermore, if a plurality of storage cylinders 57 having such a structure are prepared, the work can be tightened continuously only by replacing the storage cylinders 57.

[0013]

DISCLOSURE OF THE INVENTION Problems to be Solved
Unlike the tape 4 which cannot be reused like the tape 4, the storage cylinder 57 described in Japanese Patent No. 6270 can be reused repeatedly, and like the holder block 8, the volume is unnecessary and the number of storages is not limited. Although excellent, there are various problems. That is, it is said that it is an improvement under pneumatic conveyance, and it requires a compressor, cannot escape from the inconvenience of having to pull the air hose, and it is said that the screw mounting is by a supply device that is not specifically shown. However, there is no ready-made device that enables automatic mounting of screws in this peculiar posture, and it is expected that its manufacture will be difficult.

Although it may be manually mounted, it is obviously troublesome. Further, the string body 13 is attached as a means for urging the feeding,
If there is such a sloppy hanging object, the work is inevitably troublesome and there is a disadvantage that the space corresponding to the feeding biasing means (spring 12) is not used for storage. Further, the storage posture of the screw is irrational in terms of the storage amount in which the screw tip hits the screw head, and clogging cannot be avoided, which is troublesome to maintain.

The present invention has been made in view of the above points, and an object of the present invention is to greatly increase the amount of stored screws and to eliminate the need for a power source for feeding out the screws. As for the screw transfer mechanism, the power source is unnecessary and the maintenance is simplified, and the
The purpose of the present invention is to provide a new screw supply method and screw supply device that automatically supplies one screw to the tip of the driver for each tightening work cycle from a cassette that stores a predetermined amount of screws to be mounted on an automatic driver that has realized low cost. is there.

[0016]

In order to achieve the above object, the screw feeding method of the present invention is arranged such that the aligned screws are preliminarily waited in the vicinity of the automatic driver, and one screw is delivered for each tightening work cycle. It is a method of feeding out ahead of the driver, and like the slit in the screw feeder, it has a rail part that can lock the seat surface of the screw head and make it hang vertically and a strip part that prevents upward pull-out. A predetermined number of screws are vertically stored in a cassette that has a groove and has a groove that can replace the chute of the screw feeder or can be connected to the chute. As a screw guide chute connected to the chuck portion, similarly to the cassette, a groove for suspending screws in a vertical direction is secured in an inclined posture in which gravity can be lowered to prevent the screw from slipping upward, and the cassette is connected to the main body unit. Removably assembled in a tilted posture, and for each tightening work cycle, an escape mechanism is used to feed one screw to the screw guide chute by gravity, and only the gravity reaches the chuck part at the tip of the driver. For this reason, it is slid and automatically supplied.

In the screw feeder of the present invention, similarly to the slit in the screw feeder, there are provided a rail portion capable of locking the seat surface of the screw head to be vertically suspended, and a cover portion for preventing upward pull-out. A cassette which can be attached to and detached from a main body unit described later, which can replace the chute of a screw feeder having a groove and which can be connected to the chute, and a screw guide in an inclined posture in which a screw can be vertically suspended in the tip chuck portion like the cassette. The main body unit is attached to an automatic driver tip outer cylinder provided with an escape mechanism for connecting the chute to the screw guide chute and feeding out one screw by gravity drop for each tightening cycle.

In the cassette, it is preferable that the transparent resin bar has a through hole having a T-shaped cross section vertically provided, and one or both of them has stoppers for preventing screws from falling off. In the escape mechanism, the arm taken out from the driver main body side comes into contact with the side surface of the two-step stopper made of a leaf spring provided in the middle of the screw guide chute, and the relative displacement of the fixed side and moving side components of the main body unit causes The lower stoppers alternately act as a dam on the stage stoppers facing each other by 1
It would be good if it was to deliver to Kuga.

It is preferable that the chuck portion is manually releasable by urging the chuck by interposing a spring for elastic repulsion between the block and the block brought out from both claws of the chuck portion. 2 for loose fitting of screws and tight clamping of screws
It is good that a stage closing mechanism is provided.

In the two-stage closing mechanism, facing pins are set up on both claws of the chuck part, and an elevating bar controlled to be fitted between the facing pins is arranged on the upper side. It is advisable to make the strongest blockage, and the intermediate blockage for receiving screws by interposing the facing pin of the bar. It is preferable that the screw shaft part holding wall surface of the claw of the chuck part is shaped into a V-cut.

[0021]

[Function] The cassette that receives screws by the mechanism common to the slits in the screw feeder can store a large number of screws in a predetermined span by rational vertical storage, and not only connects from the screw feeder to the chute, It is possible to receive the supply by mounting it in place of the bullying chute. That is, as shown in FIG. 18, in a stock case (not shown) equipped with various dippers of a general-purpose screw feeder, two plates 58, 58 for locking the screw head and suspending the screw shaft portion are provided. An inclined chute 61 having a slit 60 formed by standing upright via a spacer 59 is attached.

The screw alignment function of the chute 61 is shown in FIG.
As shown in FIG. 9, the slit 60 forming the rail 62 has the maximum cross section and locks with the seat surface 5a of the screw head of the flat screw 5 that widens toward the end as a sliding surface, and the screw shaft portion at which the center of gravity of the screw 5 exists. 5b hangs down and is extremely stable with no risk of rolling and no overlap with adjacent screws.

In the cassette of the present invention, as shown in FIG. 20, the rail 62 is common and a cover strip 63 is provided to prevent the rail 62 from slipping upward, thereby connecting the screw feeder and the chute 61. It is possible to replace This type of screw feeder is widely used and inexpensive, and even if it is a modified product for replacement, the cost is extremely low. Therefore, the screw can be easily accommodated in the cassette by using an automatic machine. Since the power for delivering the screw from the cassette to the main body unit and the screw conveying power to the tip chuck portion in the main body unit is due only to gravity, no power source other than the power source for driving the automatic driver is required. A revolutionary simple screw automatic supply means was realized here. From the cassette to the chuck part, the screws, which are always in a hanging posture with the screw head locked, do not mesh with each other, and maintenance is very easy. The chuck part that can be opened manually is suitable for maintenance, and if the screw shaft part is firmly held by the two-step closing mechanism, it can be used for any screw tightening posture such as against the ceiling. Due to the V-cut of the wall surface, a stronger wedge can be expected due to the wedge action.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment of the present invention will be described with reference to the basics of the method and apparatus of the present invention. That is, reference numeral 23 in the drawing denotes a unit main body which may be detachably attached to the tip outer cylinder 25 of the automatic driver main body 24 as an attachment or may be integrally attached to the preliminarily outer cylinder 25. A chuck portion 26 that holds the screw 5 that is conveyed to one piece is provided at the tip of the vertically movable block 28 that is pressed and urged by the interposition of the strip 27. A screw guide chute 29 in an inclined posture capable of suspending and suspending the head is provided in a branch shape and connected.

The block 64 fixed to the outer cylinder 25, which is the other component, and the above block 28 are connected to each other with respect to the block 28 in which the prismatic space 65 is divided into two as shown in FIG. This is done by incorporating a guide tube 66 with a square flange 67 attached to the tip of the ridge 27 and the lower surface of the block 64 into the prismatic space 65, and ascending / descending a predetermined span without falling off under a rotation stop (block 28 and the block 64 can be relatively approached and separated from each other.

A cassette 30 is detachably attached to the upper end of the screw guide chute 29. The cassette 30 is shown in detail in FIG. That is, a through hole 31 having a T-shaped cross section, which has a rail 62 on which a screw 5 can be suspended vertically like a slit in a screw feeder and which has a cover portion 63, is formed in a transparent resin bar. A stopper 32 is provided on one or both sides of the plate spring to prevent the screws from falling off, which is bent in a dogleg shape. By using a transparent resin, it can be visually recognized from the outside, and if various constants are used, the number of tightened screws can be counted, which serves as a confirmation standard for tightening work. As a result, the cassette 30 has no fear of screws coming off from the accommodation port, and does not come off from the top due to the cover strip portion 63, so that the screws do not come off under any handling. Furthermore, since it has a common passage for the slits of the screw feeder, the screw can be easily supplied by connecting it to the tip of the chute of the existing screw feeder.
Also, an inexpensive screw feeder is modified to accommodate the screw in the cassette 30, that is, the cassette 3 is replaced with the cassette 3 instead.
0 may be detachably attached. An example is shown in FIG. That is, it suffices that the cassette 30 is detachably attached to the screw feeding portion 34 of the stock case 33 having a dipper (not shown), instead of the chute. That is, the receiving frames 36 and 36 'may be provided on the upper side and the lower side, respectively, to receive the receiving frames. The encircled lines α and β of the corresponding portion are shown in detail in FIGS. 5 and 6, but as shown in FIG. 5, the upper end of the cassette 30 is dropped into the receiving frame 36 and then moved forward to the screw feeding portion 34. Strike. Reference numeral 35 in the figure denotes an opening bar for the stopper 32, which will be described later.

Further, as shown in FIG. 6, the lower end of the cassette 30 may be dropped and supported on the receiving frame 36 '. It is necessary to open the stopper 32 for assembling with the screw feeding portion 34, but as shown in FIG. 7, if the opening bar 35 is arranged on the feeding portion 34 side and the stopper 32 is opened by inserting and assembling. good. As shown in FIGS. 8 and 9, if a similar opening bar 37 is arranged on the side of the screw guide chute 29, the cassette 30 can be assembled to the screw guide chute 29. At this time, in the case where the stoppers 32 are provided on both sides as described above, the assembly is convenient regardless of the directionality (the same applies to the screw feeder).

An escape mechanism 38 is shown in FIG. 8 and its operation is shown in FIG. That is, the arm 39 carried out from the driver body 24 side toward the screw guide chute 29 is in contact with the side surface of the two-step stopper 40 made of a leaf spring provided in the middle of the screw guide chute 29 for tightening. By the relative rise of the block 28 (during tightening), the two-step stopper 40 is pushed and the lower stopper 4
From the mode (a) in which 0a dams the screws 5, ... And the upper stopper 40b escapes, the tightening is completed, and the relative lowering of the block 28 (at the time of resetting) causes the two-step stopper 40 to move.
Is restored, and one screw 5 is opened by opening the lower stopper 40a.
The upper stopper 40b blocks (b) the screws 5, ... In the next tightening, the block 28 is relatively raised and the two-stage stopper 40 is pushed, and the screws 5, ... In the mode (b) are advanced by one unit, and the lower stopper 40a blocks the rearrangement (a). . By repeating this, the screws are immediately fed out as soon as the tightening is completed.

As shown in FIG. 1, the lower half of the screw guide chute 29 of the block 28 is largely cut away, and the lower half of the screw guide chute 29 reaching the chuck portion 26 has a groove portion for accommodating the screw portion of the screw 5. Without, the threaded portion is exposed to the outside. This is not only for visual recognition of the work, but also for maintenance of extra feeding screws. In other words, since this part is not a closed path, it is easy to pinch the screw by hand, and with the mechanism for opening the maintenance of the chuck part, which will be described later, the screw that has been fed out is pinched by hand to the chuck part 26. It can be guided and eliminated quickly.

The chuck portion 26 needs to securely hold the screw portion of the received screw 5. This is because the driver's screw head sways when approaching the screw head by pushing the screw against the work piece in a hugless manner and then pressing it further (especially when the guide chute 29 on the entrance side is opened). However, the essential meshing does not occur.

In the present invention, this is solved by applying a two-step closing mechanism to the chuck portion 26. That is,
FIG. 11 shows the entire two-stage closing mechanism 41 provided in the unit main body 23. That is, the confronting pin 4 is attached to both the claws 26a, 26a of the chuck portion 26 at the lower end of the block 28.
2 and 42 are erected, and a bar 43 which is fitted between the pins 42 and 42 and which gives the chuck portion 26 an open leg suitable for receiving an intermediate screw is provided with a built-in guide 44 which can be fitted and removed. It is arranged so as to be able to slide up and down while being urged downward by a tension spring 45 of a stretch.
However, the urging spring 45 has no force to forcefully insert the bar 43 between the pins 42, 42.

The upper end of the bar 43 is formed into a bent hook 46, and the tip of a swing arm 47 of a pivot stop 48 is hooked to the lower surface of the bar 43 on the side surface of the block 28. The bar 43 is biased upward by a tension spring 49 interposed between the bar 43 and the swinging arm 47.
The pin 42 is pulled up and removed from between the pins 42.

In the figure, reference numeral 50 denotes a rotation restricting stopper which is brought out from the portion where the outer cylinder 25 is assembled and brought into contact with the swing arm 47, whereby the above-mentioned removal and raising margin of the bar 43 is appropriately controlled. At the time of tightening, the swing arm 47 is pushed down to release the lock on the bar 43. In the figure, reference numerals 51 and 52 denote pressing plates brought out from both the claws 26a and 26a of the chuck portion 26, which are spring-repelling springs 5 arranged between the blocks 28.
3, 53, the claws 26a, 26a are always urged toward the closed leg. When the screws clogging the screw guide chute 29 are discharged, the pressing plates 51 and 52 can be easily opened to open the legs, which is suitable for maintenance.

The stepwise operation of the above-mentioned two-step closing mechanism 41 is shown in FIG.
Shown in 2. In the figure, the claws 26a of the chuck portion 26,
Since a cross section of 26a is shown, there is a predetermined opening 54 on the entrance side even at the time of abutting, and taper cuts 55, 55 are provided on the upper edge of the screw holding portion for descending the screw head. And cut the wall that holds the screw with V cut 56, 56
It is possible to firmly hold the shaft portion of the screw by the wedge effect with the closed leg that is stronger than the above-mentioned intermediate degree described later. In this way, the chuck mechanism peculiar to the present invention, which does not stop merely by locking the screw head but strongly holds the shaft portion over a span of a predetermined length, extends from the time when the screw 57 is brought into contact with the workpiece until the bit 57 approaches. It is possible to eliminate the inevitable inconvenient head sway and facilitate the tightening work.

In the figure (a), the bit 57 stands by above,
The screw 5 indicates the stage where it is chucked by the claws 26a, 26a, and the chuck is the strongest stage, and the claws 26a, 26a
The distance 6a is narrower than the distance between the screw guide chutes 29, and the V cuts 56 and 56 firmly hold the shaft portion of the screw 5. The bar 43 is in a position where it is completely separated from between the pins 42, 42. (B) shows a state in which the bit 57 descends and meshes with the screw head, and further enters into the tightening operation. The head of the screw 5 reaches the V cuts 56, 56 through the taper cuts 55, 55, and the claw 26a. , 26a are pushed and expanded. Since the swing arm 47 is pushed down by the rotation restricting stopper 50 and escapes downward to release the bar 43, the swing arm 47 is loosely fitted between the fully open pins 42, 42. In (c), the chuck is set to the intermediate stage in the state where the tightening is completed and the reset is started. That is, although the claws 26a and 26a try to close the legs at once by the withdrawal of the screw 5, the bar 43 has not yet been contacted by the swing arm 47 and is sandwiched between the pins 42 and 42 to close the closed leg at an intermediate level. I stopped at. Claw 2 at this stage
The distance between 6a and 26a substantially coincides with the screw guide chute 29, so that the screw 5 can be received smoothly. After that, the swing arm 47 is hooked on the bending hook 46 of the bar 43 and pulls up the bar 43 to separate it. Then, the chucking by the springs 53, 53 for elastically repelling is entirely allowed, and the process returns to (a).

As described above, in order to secure the setup for firmly holding the chuck portion 26 after receiving the screw, it is ensured that the bar 43 described above is detached from between the pins 42, 42. It must operate after acceptance. This adjustment can be easily made by interposing a rubber seat or the like on the pivot stop 48 of the swing arm 47 to give a predetermined resistance.

[0037]

Since the present invention is configured as described above, it has the following effects. (1) Gravity is sufficient for feeding the screws out of the cassette and for transporting them to the chuck portion, which realizes an epoch-making screw supply which has remarkable advantages in simplicity, cost, and working environment. (2) Since the strength of the screw chuck and the cassette can keep the screw posture constant and never fall off, it is possible to tighten the screw in any posture after chucking the screw. (3) It is easy to manually open the chuck and approach the screw, and maintenance is easy. (4) The screw feeder dedicated to the cassette can be manufactured at a low cost by a simple modification, so that the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a basic schematic diagram of the present invention.

FIG. 2 is a development explanatory diagram of a main part in FIG.

FIG. 3 is an overhead view of the cassette of the present invention.

FIG. 4 is an overall view of a screw feeder modified for exclusive use with the cassette of the present invention.

FIG. 5 is an enlarged view of an area α in FIG.

FIG. 6 is an enlarged view of a portion β of the encircling line in FIG.

FIG. 7 is a diagram showing how the cassette of the present invention is connected to a screw feeder or the like.

FIG. 8 is a perspective view showing the arrangement of the escape mechanism of the present invention.

FIG. 9 is an explanatory diagram showing how to connect the escape mechanism of the present invention to a screw guide chute.

10A and 10B are operation explanatory views of the escape mechanism of the present invention.

FIG. 11 is an overall perspective view of a chuck part two-stage closing mechanism of the present invention.

FIG. 12 is an operation explanatory view of the two-stage closing mechanism of the chuck portion of the present invention.

FIG. 13 is an explanatory view of a conventional screw supply means.

FIG. 14 is an explanatory view of a conventional screw supply means.

15A is a front view of a conventional screw supply means, and FIG. 15B is an enlarged detailed view of a fracture of a main part.

FIG. 16 is an explanatory diagram of a conventional screw supply means.

17 (a) and 17 (b) are explanatory views of the essential parts of the components shown in FIG. 15, respectively.

FIG. 18 is an explanatory diagram of a chute of a conventional screw feeder.

FIG. 19 is an explanatory diagram of a screw suspension mechanism according to a track of a chute in the screw feeder.

FIG. 20 is an explanatory diagram of a screw suspension alignment principle of the present invention.

[Explanation of symbols]

 1 Driver Main Body 2 Driver 3 Support Tube 4 Tape 5 Screw 6 Storage Case 7 Guide 8 Holder Block 9 Holding Guide Member 10 Pushing Member 11 Plug 12 Spring 13 String Body 14 Engaging Groove 15 Engaging Hole 16 Blocking Member 17 Slit 18 Ring Spring 19 Stopper claw 20 Nose 21 Cylindrical member 21a Cylindrical part 22 Supply pipe 23 Main body unit 24 Automatic driver main body 25 Outer cylinder 26 Chuck part 26a Claw 27 Rip 28 Block 29 Screw guide chute 30 Cassette 31 Through hole 32 Stopper 33 Stock case 34 Screw feeding part 35 Opening bar 36, 36 'Receiving frame 37 Opening bar 38 Escape mechanism 39 Arm 40 Two-step stopper 40a Lower stopper 40b Upper stopper 41 Two-step closing mechanism 42 Opposite pin 4 Bar 44 Guide 45 Biasing spring 46 Bending hook 47 Swing arm 48 Pivoting stop 49 Tension spring 50 Rotation restriction stopper 51 Holding plate 52 Holding plate 53 Repulsion spring 54 Predetermined opening 55 Taper cut 56 V cut 57 Storage tube 58 Plate 59 Spacer 60 Slit 61 Chute 62 Rail part 63 Cover part 64 Block 65 Prismatic space 66 Guide tube 67 Square flange

Claims (10)

[Claims] 1. A method of preliminarily waiting the aligned screws in the vicinity of an automatic driver, and feeding them out to the driver one by one in each tightening work cycle, which is the same as the slit in the screw feeder. Alternative to chute of screw feeder or connection to the chute with a groove having a rail part that can lock the seating surface of the head and suspend it vertically and a cover part that prevents upward pulling out A predetermined number of screws are stored in parallel in a cassette that can be installed on the other hand.On the other hand, a screw guide chute connected to the tip chuck part is installed on the main unit that is assembled to the outer cylinder of the tip of the automatic driver. To prevent the slip-out, secure the slidable vertical grooves in an inclined posture that allows gravity to descend, and attach the cassette to the main unit in an inclined posture so that the cassette can be detachably attached. One screw is delivered to the screw guide chute via the cape mechanism by gravity and is automatically supplied to the chuck portion at the tip of the driver by sliding only by gravity. Screw supply method. 2. A screw having a groove having a rail portion capable of engaging and vertically suspending a seat surface of a screw head like a slit in a screw feeder, and a cover portion for preventing upward pull-out. A cassette that can be attached to and detached from a main body unit described below that can replace the chute of the feeder or can be connected to the chute, and a screw guide chute in an inclined posture in which a screw can be vertically suspended like the cassette are connected to the tip chuck portion, and A screw supply device comprising: a screw guide chute, and a main unit assembled to an outer cylinder of the tip of an automatic driver, which is provided with an escape mechanism for letting one screw out by gravity drop for each tightening cycle. 3. A screw having a groove having a rail portion capable of engaging and vertically suspending the seat surface of the screw head like a slit in a screw feeder, and a cover portion for preventing upward pull-out. A cassette for a screw supply device, which can replace or be connected to a chute of a feeder and can be attached to and detached from a main unit. 4. A stopper for preventing screws from coming off, which is formed of a leaf spring having a through hole having a T-shaped cross section formed vertically through a transparent resin bar, and having one or both ends bent to retreat by bending in a dogleg shape. The cassette for screw supply device according to claim 3, which is provided. 5. An escape mechanism for connecting a screw guide chute with an inclined posture in which a screw can be vertically suspended like a cassette to the tip chuck part and for letting the screw out by gravity drop to one screw for each tightening cycle, is attached to the screw guide chute. Main unit for screw supply device that feeds the screw assembled to the outer cylinder of the automatic screwdriver tip from the cassette to the tip of the bit. 6. The escape mechanism is such that an arm brought out from the driver main body comes into contact with a side surface of a two-step stopper made of a leaf spring provided in the middle of the screw guide chute, and a fixed side of the main body unit and a moving side constituent part are relative to each other. 6. The screw for feeding the screw from the cassette to the tip of the bit as claimed in claim 5, wherein the lower stoppers are alternately dammed by the positional displacement of the two-stage stoppers by the mechanical displacement so as to feed out one screw. Main unit for supply device. 7. A chuck unit for a main body unit, which is easily released manually, in which an elastic spring is interposed between a pressing plate brought out from both claws of the chuck unit and a block to urge the chuck. 8. A chuck unit for a main body unit, which is provided with a two-step closing mechanism for loosely receiving a screw and tightly holding the screw. 9. A two-step closing mechanism has opposing jaws erected on both jaws of a chuck portion, and an elevating bar controlled to be fitted between the opposing jaws is arranged above, and a stable screw is held by escape of the bars. 9. The chuck unit for a main body unit according to claim 8, wherein the chuck is the strongest block for the main unit, and the intermediate block for receiving the screw is provided by interposing the facing pin of the bar. 10. The chuck portion for a main body unit according to claim 7, 8 or 9, wherein the screw shaft portion holding wall surfaces of both the claws are shaped in a V cut.