JPH0615940U - Automatic screw feeder for screwing machine - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide an automatic screw feeder in a screwing machine capable of continuously screwing a large number of screws in sequence. [Structure] When the screw is screwed by being attached to a tool such as an electric screwdriver, a ratchet pawl (52) of a pawl wheel feeding means (5) provided in the bushing (2) is moved forward as the tool is pushed forward. However, the sprocket (56) of the ratchet wheel feeding means (5) and the screw belt (16) meshing with the gear of the sprocket (56) are not interlockedly rotated, and the screw feeding operation is performed during the screw tightening operation. However, once the screw tightening work is completed and the pressure on the tool is released, the tool returns to its original position due to the elastic recovery of the push spring (7), and at the same time, the ratchet wheel feeding means (5) also returns to its original position. As it moves backward, the sprocket (56) is interlockedly rotated, and the sprocket (56) further drives the screw belt (16) to move the screw head to be screwed next to the front end of the bit (96) of the tool machine. At the corresponding aiming position By moving to allow continuous automatic feed supply screws.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a screw feeder for a screwing machine, and more particularly to a screw automatic feeder for automatically supplying a screw to a tool such as an electric screwdriver when screwing the screw.

[0002]

[Prior art]

 Currently, when screwing a large number of screws, most of them use an electric screwdriver to screw the screws one by one to a predetermined position to complete the screwing work. The head is flat and the head is flat, and the threads are threaded on the body, so the overall shape is quite irregular, so it is not possible to bundle these many screws and store them regularly. It's extremely difficult. Therefore, it is usually stored randomly in a box or bag, and each time an operator uses it, he puts his hand into the box or bag to pick up one screw at a time, and the head of this screw is used to tip the rotary shaft of the tool. Since it is screwed into a predetermined position by rotation and screwed or screwed, the conventional screwing work of gripping, fitting and screwing of this kind requires a considerable amount of time. The work efficiency is low and it is uneconomical, and the tips of randomly stored screws are randomly oriented, so when a worker picks up a screw, he or she tends to be stabbed by the sharp tip and get scratched.

On the other hand, although nails similar to a screw shape had the above-mentioned confusion, the nailing machine was developed, and a large number of nails were regularly arranged and housed in the nailing machine. It is now possible to drive each one into a predetermined place. However, in this nailing machine, the nailing work can be completed by simply sending out the nails, whereas when screwing the screw is completed, it always involves screwing and rotating operation.Therefore, with the same structure as the nailing machine, the screwing work is performed. I can't proceed.

[0004]

[Problems to be solved by the device]

 In view of the problems of the screw feeder in the conventional screw tightening machine described above, an object of the present invention is to provide an automatic screw feeder for a screw tightening machine capable of successively screwing a large number of screws in sequence.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention forms a plurality of sprocket holes which are regularly spaced along both side edges of the elastic flexible tape and has a large number of regularly spaced sprocket holes in its central zone. Attach the screw belt so that the bit is rotatably inserted into the center hole of the screw belt and the outer periphery of the chuck at the tip of the tool. A hollow shell bushing that is held, and two flat plates that are held parallel to each other and face each other, and a slide that is slidably inserted into and out of the bushing from one end and the tip of the slide is rotatable. A sprocket is provided, and a push spring provided in the bushing elastically locks the slide along the outer circumference of the bit so that the slide can enter and return, and a pawl wheel feed means is provided in the slide to provide the sprockets. The screw belt is intermittently rotated by feeding the screw belt by the pawl wheel feeding means with the sprocket hole meshing with the sprocket hole of the feeding mechanism. The bit rotating toward the mouth of the tip is configured to press and screw the screw.

Then, an insertion hole for locking the screw is formed in the screw belt, and a plurality of radial slits longer than the outer diameter of the head portion of the screw are formed through the various insertion holes to form the ratchet wheel feeding means. As a feeding mechanism provided, a ratchet pawl rotatably pivoted on the slide is guided so that the arcuate slot moves along with the slide so that the ratchet pawl is moved and rotated. The screw belt is rotated so that its sprocket hole moves by one pitch length, and a guide spring piece is provided at the top end of the feed mechanism so that the screw feed completion side of the screw belt is located between the slides. It is even more preferable to guide it outside the bushing.

[0007]

The present invention configured as described above becomes a screw tightening machine that continuously and automatically sends screws when it is mounted on the front end of a tool such as an electric screwdriver, that is, a screw belt with a large number of screws mounted on it. Insert the head of the first screw into the bushing from the front end, align the head of the first screw with the bit front end of the electric driver, and move the screwing machine to the position where the screw is to be screwed, and slide When the front end is brought into contact with the screw tightening position and actuated and pressed, the bushing moves forward and the bit front end of the tool machine engages with the head of the first screw to rotate the screw in an interlocking manner. If the pressing force is continuously maintained as it is, the screw can be screwed into the screwing position. When the screw of the first screw is completely screwed, the pressing force is released. At this time, the elastic recovery of the push spring pushes the slides forward so that the bushing moves relatively backward, and at the same time, the claw wheel feeds. The retracting means is also retracted, and the ratchet wheel feeding means is interlocked so as to rotate the sprocket at an appropriate time at an appropriate time, and the screw belt meshed with the sprocket corresponds to the screw head of the second screw with the front end of the bit. Since it is driven to rotate to the position, the next screwing work can be performed by pushing the screwing device toward the screwing position, and therefore the screw is automatically and continuously screwed. Can be sent to.

Then, an insertion hole for locking the screw is formed in the screw belt to form a plurality of radial slits longer than the outer diameter of the head portion of the screw from each insertion hole, and the ratchet wheel feeding means is provided. As a feeding mechanism provided, a ratchet pawl rotatably pivoted on the slide is guided so that the arcuate slot moves along with the slide so that the ratchet pawl is moved and rotated. The screw belt is rotated so that its sprocket hole moves by one pitch length, and a guide spring piece is provided at the top end of the feed mechanism so that the screw feed completion side of the screw belt is located between the slides. If it is guided outside the bushing, the operation of the entire device can be skillfully controlled and the automatic screw feeding for screw tightening work is timed. Can be done well.

The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

[0010]

【Example】

 First, as shown in the sectional view of the embodiment of the present invention in FIG. 1, the screw automatic feeder 1 in the screwing machine of the present invention mainly comprises a hollow shell-shaped bushing 2 and an opening at one end of the bushing 2. A connecting plate 3 fitted to a portion, a pair of parallel and substantially flat plate-like slides 4 which are loosely fitted in the bushing 2 and are movable at the other end of the bushing 2 (one slide in the figure). 4 is shown), the ratchet wheel feed means 5 mounted between the pair of slides 4 (a cross section of the ratchet wheel feed means 5 is not shown here to avoid complexity in the drawing), A feeding mechanism 6 fixed between the slides 4, a pushing spring 7 mounted along the axial direction inside the hollow of the bushing 2, and the movable ratchet wheel feeding means 5 are returned to their original positions. A pair of sub-springs 8 (on one side in the figure Of the bushing 8), of which the connecting plate 3 is provided with a connecting hole 31 in the central portion thereof, and a bearing seat 32 having a central hole on the surface facing the hollow interior of the bushing 2. Is provided, one end of the push spring 7 is fitted into the center hole of the seat 32, and a guide slot 41 is provided at an appropriate position of the slide 4, and the front end of the guide slot 41 is curved downward. Formed in the arc-shaped slot 411, and a guide groove 42 protruding in a semicircular shape is provided at an appropriate position on the inner surface of the slide 4 (that is, the surface facing the hollow inside of the bushing 2). A hole 61 is provided along the center line of the feeding mechanism 6 fitted in the substantially middle portion of the slide 4, and the center line of the hole 61 is aligned with the center line of the connecting hole 31 of the connecting plate 3. At the end Wearing the edge sleeve seat 60, it is fitted fixing the other end of the compression spring 7 to the projecting edge sleeve seat 60.

FIG. 2 is a partial cross-sectional view of an embodiment of the present invention which is orthogonal to the cross section shown in FIG. 1, and as shown (for the convenience of explanation, the feeding mechanism 6 is not shown in cross section), the bushing is shown. 2, slide grooves 21 are provided at appropriate positions on both inner side surfaces, and guide blocks 48 are formed at portions of the pair of slides 4 close to the rear ends of the side surfaces, respectively. The bushing 2 is engaged with both slide grooves 21 of the bushing 2 to guide the bushing 2 so that the bushing 2 can move relative to the pair of slides 4. Then, when the guide grooves 42 of the pair of slides 4 are made to correspond to each other and are used as feed passages for screws (not shown) that are screwed with an appropriate gap between them, at the same time Fixing seats 47 having hole holes 471 are provided at appropriate positions on the inner surface of the slide 4, and mounting portions 62 and 63 are provided on both sides of the front end of the feed mechanism 6, respectively. Are respectively fitted into the hole 471 of the fixing seat 47 so that the feeding mechanism 6 can be fixed between the pair of slides 4. Further, the adjusting plate 15 having the adjusting groove 151 on the inner side surface of one of the slides 4 is fastened to the outer side of the fixed seat 47 of the feeding mechanism 6 by the screw 152, and one of the slides 4 is fixed. Connecting pins 44 and 45 are provided near the rear end of the inner side surface, respectively (see also FIG. 1) at the upper and lower sides, and the projecting ends of the connecting pins 44 and 45 contact the inner surface of the other slide 4 and at the same time A fixing screw 46 is screwed onto the connecting pins 44 and 45 from the outer surface of the slide 4 to connect the pair of slides 4, and the parts such as both slides 4, the feed mechanism 6 and the adjusting plate 15 are put together. Connect.

FIG. 3 is a three-dimensional exploded perspective view of the ratchet wheel feeding means of the embodiment of the present invention. As shown in the figure, the ratchet wheel feeding means 5 is pivotally attached to the sliding seat 51 and the front end of the sliding seat 51. It is formed by a ratchet pawl 52, a spring 54 connected to the ratchet pawl 52, and a projecting pin 55 fitted at an appropriate position near the rear end of the sliding seat 51, of which the sliding seat 51 is a rear Recessed portions 514 are provided on both sides of the end wall, and the recessed portions 514 are used for hooking one ends of the pair of sub springs 8, and the rear wall of the bottom wall of the sliding seat 51. Protruding pin pillars 512 are fitted on both sides close to each other, and rollers 513 are respectively provided at the projecting ends of the pin pillars 512, so that both rollers 513 can slide into the guide slots 41 of the slides 4 respectively. Engage with the plan The ratchet pawl 52 is provided with a connecting rod 521, and hook plates 522 are provided at both ends of the connecting rod 521, while the ratchet plate 522 is provided with a suitable relative position. Pivot holes 523 are opened at the respective portions, and pivot pins 511 having guide rollers 510 attached to the projecting ends are provided on both sides of the front end of the slide seat 51. Of the ratchet pawl 52, the hook plates 522 of the ratchet pawl 52 each have a pivot pin 511 inserted through the pivot hole 523 thereof, and the hook tip of the front end of the hook plate 522 is formed. Is pivotally connected to the front end edge of the sliding seat 51 so as to project from the bottom surface of the sliding seat 51 (as shown in FIG. 1), and one end of the spring 54 is connected to the ratchet pawl 52. The rod 521 is hooked to the body and the other end is fixed to the protrusion pin 55 so that the ratchet pawl 52 can swing about the pivot pin 511 as an axis, and the pawl wheel feeding means 5 as a whole moves forward. When the hook plate 522 of the ratchet pawl 52 is obstructed by an obstacle, the hook plate 522 swings upward to overcome the obstacle and elastically recover the spring 54 to return to its original position. To

FIG. 4 is a three-dimensional exploded perspective view of the feed mechanism according to the embodiment of the present invention. As shown in the figure, the feed mechanism 6 has a guide spring piece 64 fixed to the top end face thereof, and the hole 61 of the hole. A space for accommodating a screw head (not shown) to be screwed is provided at the front end, and the sprocket 56 of the ratchet wheel feeding means 52 is pivotally attached to both mounting portions 62, 63 on both sides of the front end, respectively. As can be seen, one end of the push spring 7 is fitted into the flange sleeve seat of the feed mechanism 6.

FIG. 5 is a rear end view of an embodiment of the present invention. As shown in the drawing, the bushing 2 is formed by combining the bushing halves of both pieces, and one of the bushing halves has an adjusting hole 22 ( (Shown by a dotted line in the figure), the connecting plate 3 is fitted to the rear end of the bushing 2, and an adjusting gap 30 is provided in the connecting plate 3 to form a connecting hole 31 at the central portion of the connecting plate 3. The size of the connecting hole 31 of the connecting plate 3 can be adjusted by expanding or contracting the adjusting gap 30 so as to communicate with each other, and the bearing seat 32 (shown by a dotted line in the figure) is connected to the bushing. The adjustment span 30 is screwed in from the second adjusting hole 22 to reach the connecting plate 3 so that the adjusting gap 30 is inserted, that is, when the bearing seat 32 is screwed deeper and tighter, the gap span of the adjusting gap 30 becomes smaller. The connection is reduced The hole diameter of the hole 31 can be reduced, and conversely, when the bearing seat 32 is loosened, the gap span of the adjusting gap 30 is expanded and the hole diameter of the connecting hole 31 is increased. The adjusting plate 15 shown in FIG. 2 can be positioned such that the end of the adjusting plate 15 is flush with the outer surface of the connecting plate 3, and the rear end of the adjusting plate 15 is bifurcated. The branching plates 153, 154 can be branched out so that the branching plates 153, 154 can move out of the bushing 2 while avoiding the connecting plate 3.

FIG. 6 is a display diagram when the embodiment of the present invention is installed in an electric driver. As shown, the automatic screw feeder 1 of the present invention is installed in the chuck 9 at the tip of the electric driver. In this case, first, a connecting head 91 suitable for being screwed into the front end of the chuck 9 is selected, and then the bearing seat 32 is screwed so that the connecting hole 31 of the connecting plate 3 is connected to the connecting head 91. The connecting head 91 is inserted into the connecting hole 31 so as to be suitable for screwing, and the connecting head 91 is screwed to the connecting plate 3 by the first tightening nut 92, and the bearing seat. Tighten 32 to hold the connection firmly. Then, the other end of the connecting head 91 is then screwed to the front end of the chuck 9, and at this time, a bit (not shown) of the electric driver is inserted through the connecting head 91 to form the connecting hole 31. Through the bushing 2 and using another second tightening nut 93 to securely connect the connecting head 91 to the front end of the chuck 9 and, in this manner, to the automatic feeder for the bus. 1 is arranged at the front end of the chuck of the electric driver.

Then, referring to FIG. 1 again, as shown in the drawing, a braking spring piece 57 is provided at an appropriate position below the sprocket 56, and one end of the braking spring piece 57 is connected to the connecting pin below the slide 4. 45, with the other end free and in contact with the gear of the sprocket 56 so that it can only rotate in the clockwise direction and cannot rotate in the reverse direction, that is, the gear of the sprocket 56 can be rotated in the clockwise direction, as can be seen from the figure. Since the sprocket 56 is tilted in the direction opposite to the clockwise direction, when the sprocket 56 rotates counterclockwise, the free end of the braking spring piece 57 abuts against the gear root of the sprocket 56 and blocks it. When the sprocket 56 rotates clockwise, the braking spring piece 57 cannot prevent its rotation as shown in the figure, and both sprockets 56 of the ratchet wheel feeding means 5 are simply unidirectional. Can only rotate to.

Before the automatic screw feeder 1 is in operation, none of the push spring 7, the pair of sub springs 8 and the spring 54 of the ratchet wheel feed means 5 is subjected to compression or tension. Further, at this time, the hooks of the hook plates 522 of the ratchet wheel feed means 5 are hooked to the tooth bases of both sprockets 56 on one gear side (the state shown in FIG. 1), and in FIG. As shown, when the front ends of the slides 4 come into contact with the working surface 10, the bushing 2 is pressed to move toward the working surface 10, and at this time, the slides 4 already contact the working surface. Since they are in contact with each other, the bushing 2 cannot move, so that the bushing 2 can move relative to the two slides 4 to compress the push spring 7, and at the same time, the sub spring 8 is used to make the slide seat of the ratchet wheel feed means 5 slide. It is possible to push 51 to move it to the front end. Then, the sliding seat 51 moves in the guide slot 41 by using the roller 513, and the hook plate 522 of the ratchet wheel feeding means 5 moves in the arc-shaped slot 411 by using the guide roller 510. To do. Then, when the hook plate 522 is advanced along the arcuate slot 411, the tip of the hook hits the gear of the sprocket 56 and is blocked from moving, and the spring 54 is compressed, and the sprocket 56 does not rotate ( Since the sprocket 56 rotates only in the clockwise direction), the hooks of the hook plate 522 swing upward and go over the gear of the sprocket 56, and after passing the gear, the hook plate 522 again moves. Due to the elastic recovery of the spring 54, the spring 54 moves downward to return to the original state, and comes into contact with the tip of the arc-shaped slot 411 to stop, and thus the sliding seat 51 also stops advancing (see FIG. 7). At this time, since the bushing 2 has not reached the predetermined position yet, the bushing 2 still advances, and the pair of sub springs 8 are continuously compressed, and the bushing 2 reaches the predetermined position and stops.

FIG. 8 is another operation display diagram of the embodiment of the present invention. When the bushing 2 reaches a predetermined position, the compression is stopped, and the elasticity of the push spring 7 compressed by the above operation is recovered. It starts to move backward, and at the same time, the slide seat 51 of the ratchet wheel feeding means 5 moves backward by the tension of both the sub springs 8, and the hook plate 522 moves backward accordingly. By the way, since the hook plate 522 is moved along the arcuate slot 411 by the guide roller 510 and the curvature of the arcuate slot 411 and the curvature of the sprocket 56 are equal, the hook tip of the hook plate 522 is the sprocket 56. When the sprocket 56 is engaged with the gear and can move backward, the sprocket 56 is rotated in association with the hook plate 522, and the elastic recovery of both the sub springs 8 disappears and the sprocket 56 stops. At this time, since the sub spring 8 is an elastic body, there is a possibility that a vibration phenomenon may occur when the sub spring 8 recovers its elasticity, and the rotation angle of the sprocket 56 may exceed (the state of FIG. As shown in FIG. 8, the hook tip of the hook plate 522 no longer engages with the gear of the sprocket 56, and the braking spring piece 57 is shown. The free end of the sprocket will also not engage the gear of the sprocket 56. However, if the bushing 2 is pushed again under this state, the sliding seat 51 of the ratchet wheel feed means 5 is pushed forward, but the braking spring piece 57 is pushed. When the hook of the hook plate 522 comes into contact with one gear 560 of the sprocket 56 as the slide seat 51 moves forward, the sprocket 56 is counterclockwise when the sprocket 56 is not engaged with the gear of the sprocket 56. The gear 561 on the other side of the sprocket 56 abuts against the free end of the braking spring piece 57 to stop, and at this time, the sliding seat 51 of the ratchet wheel feed means 5 moves forward. , The hook plate 522 slips over the gear of the sprocket 56 as described above, and goes to the state shown in FIG. 7. Therefore, even if the sprocket 56 is not linked to the predetermined position, Does not affect the accuracy of the operation of Of.

Further, when the present invention is used for screw tightening work, the screw belt 16 must be arranged and used, and as shown in the front view of the screw belt of FIG. 12 when the screw is not loaded. , The screw belt 16 is provided with a plurality of insertion holes 161 which are continuously formed in the central zone at appropriate equal intervals, and sprocket holes 162 which are continuously formed at appropriate equal intervals along both longitudinal edges of the screw belt 16 are adjacent to each other. The slits 163 are provided so as to be located at intermediate positions between the both insertion holes 161, and at the same time, a plurality of slits 163 are radially formed so as to be connected to the periphery of each insertion hole 161.

FIG. 13 is a sectional side view of a screw belt according to the present invention in which a screw is inserted into an insertion hole. As shown in the figure, the inner diameter of each insertion hole 161 of the screw belt 16 is screwed by screws 17 and 18. As can be seen from the drawing, the screw belts 16 are formed to have a diameter approximately equal to or smaller than the outer diameter of the screw thread, and as shown in the drawing, a plurality of pairs of both slits 163 facing each other and an insertion hole 161 between them are provided. The areas within the two opposing slits 163 are softened so as to be easily destroyed, that is, formed by one insertion hole 161 of the screw belt 16 and a plurality of slits 163 formed associated therewith. The area A (imaginary area shown in FIG. 12) is larger than the outer diameter of the head of the screw 17, 18 to be screwed, so that the screw 17, 1 inserted into the screw belt 16 is When 8 receives an external force, the area A of the screw belt 16 is easily destroyed and separated, and the screws 17 and 18 can be screwed into place.

When performing screw screwing work using the present invention, as shown in FIG. 6, if the screw automatic feeder 1 is connected to the tip of the chuck 9 of the electric driver, the screw can be continuously screwed. The screw machine can be automatically fed. After that, as shown in FIG. 9 which is an operation display diagram during the screwing work of the present embodiment, the screw belt 16 loaded with a large number of screws 17, 18 is automatically fed by the screw automatic feeder 1 The screw belt 16 into the front end space of the feed mechanism 6 and the opposite sprocket holes 162 (shown in FIG. 12) on both side edges of the screw belt 16 are respectively fed to the ratchet wheel. The gears of both the sprockets 56 of the means 5 are meshed with each other, and the head 171 of the first screw 17 thereof is aimed directly at the front end of the bit 96 of the chuck 9 (see FIG. 6). The screwing machine is moved to a position where the target objects 13 and 14 for screwing the screws 17 and 18 are screwed together, and the front ends of both slides 4 of the automatic screw feeder 1 are brought into contact with the object 13. As shown in FIG. 9, after the front ends of the slides 4 are brought into contact with the object 13, the chuck 9 at the front end of the electric driver, which is a screwing machine, is pressed toward the object 13 to cause the automatic device for feeding the bis. The bushing 2 of No. 1 is moved, and at the same time, the front end of the bit 96 of the electric driver is fitted to the head 171 of the screw, and the electric driver is activated to drive and rotate the screw 17 and continuously press it. The screw 17 is screwed and connected to the target objects 13 and 14 while holding the propulsion force. At this time, the screw 17 is separated from the screw belt 16 which is destroyed by the pressing propulsion force of the bit 96. The screwing work is completed. When the screw screwing work is completed, the pressure on the screwing machine is released, and at this time, the bushing 2 of the screw automatic feeding device 1 is retracted by the elastic recovery of the push spring 7, and at the same time, the elasticity of both of the sub springs 8 is released. Upon recovery, the sliding seat 51 of the ratchet wheel feeding means 5 is also retracted, and the hook plate 522 is interlocked and retracted to drive and rotate the sprocket 56, so that the both sub springs 8 are in a normal state (that is, the pushing springs). When 7 is in the normal state, both sub-springs 8 pull both guide rollers 510 of the ratchet wheel feed means 5 to recover the state in which they are positioned at the rear end edge of the arcuate slot 411) and then stop. During this time, both sprockets 56 of the ratchet wheel feeding means 5 rotate by exactly one gear distance, and the screw belt 16 is moved forward by one pick between the adjacent sprocket holes 162. The head 181 of the screw 18 to be screwed next is moved to the position corresponding to the front end of the bit 96 in association with the length, and the next screwing operation is carried out. The screw can be sent to the screwing machine. Further, in order to prevent the used side of the screw belt 16 from staying in the bushing 2, one end of the guide spring piece 64 is fixed to an appropriate position of the front end of the feeding mechanism 6, and the free end of the guide spring piece 64 is fixed. The used side of the screw belt 16 is abutted and guided to the outside of the bushing 2 from between the two slides 4 so as not to affect the subsequent screwing work of the screwing machine.

FIG. 10 is a view showing a state in which the screwing work in the present invention has been completed. In the process in which the screw 96 of the electric driver screwed the screw 17 onto the article 13, the adjustment of the front end side of the feed mechanism 6 was performed. The rear end of the plate 15 is gradually advanced to the outside of the bushing 2 from the connecting plate 3, and when the screw 17 completes the screw tightening work, the rear end of the adjusting plate 15 is simultaneously moved to the front end of the screw chuck chuck 9. Upon contact, the screwing machine is blocked by the adjusting plate 15 and cannot move forward, whereby the operator senses the completion of the screwing work and releases the pressure on the screwing machine and the switch is turned on. That is, it is possible to cut the screw, that is, the screw feeding distance of the screwing machine can be accurately controlled from the installation of the adjusting plate 15, and the screwing operation of the screw is simple and quick. The adjusting groove 151 provided on the adjusting plate 15 is provided for screwing screws having different lengths. When the screw belt 16 is attached to the screw automatic feeding device 1, the screw is not screwed. When the screw tip to be tightened protrudes from the front end edge of the slide 4, loosen the screw 152 and pull out the adjustment plate 15, align the tip edge with the screw tip to be screwed, and If the adjustment plate 15 is fixed again to the side of the feed mechanism 6 by re-tightening 152, both slides 4 will be attached to the surface of the object when the screwing machine is moved to the screw screwing position for screwing work. The front edge of the adjusting plate 15 can be brought into contact with the surface of the object without abutting, and the screwing work can be advanced. At the same time, the length of the screw to be screwed is relatively long, so that the screwing machine is pressed. The distance becomes longer, and at this time, the adjustment plate 15 has already been adjusted to some extent. Since the length of the adjusting plate 15 protruding from the bushing 2 at the rear end of the adjusting plate 15 is relatively shortened, the screw tightener moves by a relatively long distance before the adjusting plate 15 is moved. This will come in contact with the rear end and prevent forward movement, and the distance moved by pressing is just equal to the length of the screw to be screwed protruding from the front end edge of the slide 4. Therefore, a screw with a relatively long screw is screwed. Even when tightening, the screw feed distance can be accurately controlled, and it is applied to screw screws of various lengths.

FIG. 11 is another operation display diagram of the screwing work of the present invention. When the rotation of the sprocket 56 exceeds a predetermined angle, the head 181 of the screw 18 to be screwed next is aimed at the front end of the bit 96. Although it does not correspond, the braking spring piece 57 at this time also does not contact the gear of the sprocket 56, but as described above, when the bushing 2 is pressed again, the hook plate 522 moves forward, The hook tip makes contact with the gear of the sprocket 56 to rotate the gear counterclockwise, and at the same time, the screw belt 16 is also interlocked with the sprocket 56 and moves in the opposite direction, so that the free end of the braking spring piece 57 is moved. The sprocket 56 stops after abutting against the gear on the other side of the sprocket 56, and at this time, the screw head 181 comes to a position in relative contrast with the bit 96, and the bit 96 is timely. The tip end is fitted into and pressed by the screw head 181, and the screwing operation of the screw 18 is completed by following the above-described operation process. Therefore, even if the sprocket 56 is not interlocked with the predetermined position, the screw is stopped. It does not affect the next screwing operation of the press.

[0024]

[Effect of device]

 Since the present invention is configured as described above, when it is attached and connected to the front end of the electric driver, it becomes a screw tightening machine that can automatically feed and feed screws, that is, by accurately controlling the screw feeding distance. Since it can be supplied automatically, the screw tightening work can be achieved easily and quickly, and it is not necessary to grip each screw one by one and screw the screw as in the conventional case, so that the worker's There is no need to worry about your hand being stabbed by a screw tip and getting injured, improving work efficiency.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention.

FIG. 2 is a perspective view of the partial cross section shown in FIG. 1 looking up from below.

FIG. 3 is a three-dimensional exploded view of the ratchet wheel feeding means in the embodiment of the present invention.

FIG. 4 is a three-dimensional exploded view of the feeding mechanism in the embodiment.

FIG. 5 is a rear view of the embodiment.

FIG. 6 is a schematic view of the present invention when it is connected to a front end of an electric driver.

FIG. 7 is an operation display diagram of the embodiment of the present invention.

FIG. 8 is another work display diagram of the embodiment of the present invention.

FIG. 9 is a screw screwing operation diagram of the embodiment of the present invention.

FIG. 10 is a view showing a screw screw completion state of the present invention.

FIG. 11 is another screw screwing operation display view of the embodiment of the present invention.

FIG. 12 is a front view of a screw belt according to the present invention without a screw.

FIG. 13 is a side view of a screw belt equipped with a screw according to the present invention.

[Explanation of symbols]

 2 ... Bushing 4 ... Slide 5 ... Claw wheel feeding means 6 ... Feeding mechanism 7 ... Pushing spring 9 ... Tool tip chuck such as electric screwdriver 96 ... Tool bit 16 ... Screw belt 161 ... Insertion port 162 ... Sprocket hole 17, 18 ... Screw 411 ... Arc-shaped slot 52 ... Ratchet claw 56 ... Sprocket 61 ... Hole 64 ... Guide spring piece

Claims (4)

[Scope of utility model registration request] 1. A plurality of sprocket holes (162), which are arranged at regular intervals, are formed along both side edges of the elastic flexible tape, and a large number of screws (17, 18) which are arranged at regular intervals in a central zone thereof. ) The screw belt (16) with the head part aligned on one side and detachably locked, and the bit (96) rotatably in the center hole of the outer periphery of the chuck (9) at the tool tip. With the hollow shell bushing (2) attached so as to be inserted and the two flat plates facing each other in parallel,
The bushing (2) is provided with a slide (4) slidably fitted in and out from one end, and a rotatable sprocket (56) at the tip thereof.
A push spring (7) provided in the bushing (2) elastically locks the slide (4) along the outer periphery of the bit (96) so that the slide (4) can enter and return, and a claw is provided in the slide (4). And a feed mechanism (6) for intermittently rotating the sprocket (56) provided with a vehicle feed means (5), wherein the sprocket hole (162) meshes with the sprocket (56) of the feed mechanism (6). By feeding the ratchet wheel feeding means (5), the screw belt (16) is intermittently fed, and the bit (96) rotating facing the hole opening (61) at its tip presses the screws (17, 18). An automatic screw feeder for a screwing machine configured to be screwed. 2. The automatic screw feeder according to claim 1, wherein the screw belt (16) is provided with an insertion hole (161) for locking a screw (17, 18), and each insertion hole (16).
1) An automatic screw feeder in a screwing machine, which is formed with a plurality of radial slits (163) longer than the outer diameter of the head portion of the screws (17, 18). 3. The automatic screw feeder according to claim 1, wherein a ratchet pawl rotatably mounted on the slide (4) serves as a feed mechanism (6) having the pawl wheel feed means (5). 52) to move and rotate by guiding the arc-shaped slot (411) as it moves along with the slide (4), and the sprocket (56) is angularly rotated each time, so that the screw belt is rotated. (16)
The automatic screw feeder in the screwing machine in which the sprocket hole (162) is moved by one pitch length. 4. The automatic screw feeder according to claim 1, wherein a guide spring piece (64) is provided at the top end of the feeding mechanism (6), and the screw feeding completion side of the screw belt (16) is moved to the slide (4). An automatic screw feeder for a screwing machine, which guides the bushing (2) out of the space.