JP3545309B2 - Screw feeder - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
According to the present invention, a screw having a head and a shaft, a screw such as a rivet or a stud is sequentially discharged, and a bit at a tip of a tool such as a screwdriver is guided at a predetermined position to take out the screw with the bit. The present invention relates to a screw feeder capable of forming a screw.
[0002]
[Prior art]
Conventionally, as this kind of screw feeder, for example, a screw feeder as shown in FIGS. 8 and 9 has been known (for example, see Japanese Patent Publication No. 4-35306).
This means that the housing 2 provided on the machine base 1 and accommodates a large number of screws S, and the groove 3 which projects outward from the interior of the housing 2 and into which the shaft Sa of the screws S is inserted from above. A rail 4 for supporting the head Sb of the screw S at the opening edge of the groove 3 and guiding the screw S discharged from the inside of the housing 2 to the outside, and provided at the tip of the rail 4 and discharged. A stop part 6 for stopping and holding the screws S by a stopper 5 urged by a spring provided on the side of the rail 4, and a screw S provided on the stop part 6 and located at the stop part 6. And a bit guide section 7 for guiding a bit B at the tip of a tool such as a screwdriver for taking out.
As shown in FIG. 9, the bit guide portion 7 is provided to face the discharge direction of the screws S, and is a fan-shaped flat sliding contact plate in which the bits B can slide and reach the head Sb of the screws S. 7a, and a pair of guide plates 7b formed to be bent on the left and right sides of the sliding contact plate 7a to guide the bit B in sliding contact and to form a guide port 8 for guiding the bit B to pass therethrough below. ing.
When the screws S reaching the stop portion 6 are taken out by the bit B, the bit B is pressed against the bit guide portion 7, and the bit B slides on the sliding contact plate 7a and is guided by the guide plate 7b. It reaches the opening 8 and passes through the guide opening 8 to engage with the head Sb of the screws S. Thus, the screws S are taken out.
[0003]
[Problems to be solved by the invention]
By the way, as the screws S, for example, in the case of a small screw, the outer diameter of the shaft portion Sa is 1 mm, 1.2 mm, 1.4 mm, 1.7 mm, 2 mm, 2.3 mm, 2.6 mm, 3 mm However, when a screw feeder is used corresponding to these types, the supply is performed by exchanging the rails 4 corresponding to the outer diameter of the screws S.
When the screws 4 of different types are supplied by exchanging the rail 4, as shown in FIGS. 10A and 10B, in the case of a screwdriver, bits having different outer diameters d (for example, d1, d2) are used. B, or as shown in FIGS. 11A and 11B, an air suction type tool uses bits B having different outer diameters d (d3, d4).
However, in the conventional screw feeder, since the bit guide portion 7 is formed by bending the guide plates 7b on the left and right sides of the sliding contact plate 7a, the width D of the guide opening 8 is univocal. Therefore, when the screws 4 of different types are supplied by replacing the rail 4, it is necessary to replace the bit guide portion 7 with the guide port 8 having the width D corresponding to the bit B having a different outer diameter. Occurs.
For this reason, it is necessary to prepare a bit guide portion 7 corresponding to the type of the bit B, so that the number of parts increases, the production becomes complicated, the management becomes complicated, and the replacement work becomes necessary one by one. Therefore, there was a problem that the working efficiency was poor.
[0004]
The present invention has been made in view of the above-described problems, and a single bit guide portion can accommodate bits of various thicknesses, thereby reducing the number of parts, facilitating management, and simplifying replacement work. It is an object of the present invention to provide a screw feeder with improved work efficiency.
[0005]
[Means for Solving the Problems]
The technical means of the present invention for achieving such an object is to sequentially discharge screws having a head and a shaft from an internal storage portion, and place the screws at a predetermined position with the head thereof up. A screw provided with a stop portion for stopping the shaft portion down, and a bit guide portion provided at an upper portion of the stop portion for guiding a bit at a tip of a tool for taking out the screws located at the stop portion. In the kind feeder, the bit guide portion has a sliding contact surface provided so as to oppose the discharging direction of the screw so as to block the discharging direction of the screw, and the bit is in sliding contact with the head of the screw. And a guide port provided on the left and right sides in the discharge direction on the sliding contact surface side of the sliding contact member for guiding the bit so that the bit can reach the head of the screw. At the same time so that the width of the guide openings becomes variable. A pair of chips which are capable provided, and the chip constitute a lock mechanism for locking with respect to the sliding member in a moved position where the guide opening is required width.
[0006]
When this screw feeder is used, the width of the guide port of the bit guide portion is adjusted in advance in accordance with the outer diameter of the bit from which the screw supplied by the screw feeder is taken out. Also, when supplying another screw having a different outer diameter of the shaft portion of the screw, the width of the guide opening of the bit guide portion is adjusted according to the outer diameter of the bit from which the other screw is taken out. . In this adjustment, the lock mechanism is released, the two chips are moved toward and away from each other, the width of the guide port is changed, and the lock is locked by the lock mechanism at a moving position where the guide port has a required width. In this case, by adjusting the width of the guide opening of the bit guide portion, it is possible to easily cope with the size of the bit. For this reason, unlike the related art, a single bit guide section can handle bits of various thicknesses without preparing a bit guide section corresponding to the type of bit. The number is reduced, the management becomes easy, and there is no replacement work of the bit guide portion, so that the work efficiency is improved.
[0007]
Then, if necessary, the bit is slid in contact with the adjacent portion of the chip adjacent to the sliding member so that the interval between the adjacent portions of the chip is reduced toward the guide port. The guide surface for guiding to the guide opening is formed. Since the bit is guided by the sliding contact surface, the guide surface, and the guide port to reach the head of the screw, the bit can be securely and easily engaged with the screw, and the take-out operation can be performed extremely easily.
Further, if necessary, the sliding contact surface of the sliding contact member is formed so as to be inclined gradually toward the stop portion side. Since the bit slides along the slope, the bit can be easily moved to the head of the screw, and operability can be improved.
In this case, if necessary, the sliding contact surface of the sliding contact member is constituted by one plane.
In addition, if necessary, the sliding contact surface of the sliding contact member is formed of two planes having a bent line extending from the upper side to the guide port of the chip and having a V-shaped cross section. The bit can be easily brought into sliding contact with the broken line, and the broken line is a straight line, so that the bit can be moved with certainty, and operability can be improved.
[0008]
Further, if necessary, the lock mechanism may include an elongated hole formed in the sliding contact member and extending in the direction of movement of the chip, a bolt protruding from the back surface of the chip and penetrating through the elongated hole, And a nut that is screwed into a bolt inserted through the nut and fastens the chip to the sliding contact member by tightening. The mechanism can be simplified and the tip can be moved and locked.
Further, if necessary, a groove protruding from the inside of the housing portion to the outside and having a shaft portion of the screw inserted from above is provided. A rail for guiding screws discharged from the inside to the outside is provided.The stop portion is formed at the tip of the rail, and a plurality of types of rails are prepared corresponding to screws of various sizes. Multiple types of rails are interchangeable.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a screw feeder according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The same components as those described above will be described with the same reference numerals.
The screw feeder shown in FIGS. 1 to 4 accommodates a large number of screws S such as screws, screws, screws, rivets, and rivets having a shaft portion Sa and a head portion Sb having a larger diameter than the shaft portion Sa. It is a device that feeds the papers one by one. The embodiment shows a case where the present invention is applied to a small screw.
[0010]
As shown in FIG. 1, the screw feeder according to the embodiment includes a housing portion 2 provided in a machine base 1 for housing a large number of screws S, a screw protruding from the inside of the housing portion 2 to the outside, and a screw. The shaft portion Sa of the class S has a groove 3 to be inserted from above, and the opening edge of the groove 3 supports the head Sb of the screw S and guides the screw S discharged from the inside of the housing portion 2 to the outside. A rail 4 to be stopped, and a stopper 6 having a stopper 5 for urging and stopping the screws S formed at the tip of the rail 4 and discharged along the rail 4 by a spring provided on the side of the rail 4. And a bit guide portion G which is provided above the stop portion 6 and guides the bit B at the tip of a tool such as a screwdriver for taking out the screws S positioned at the stop portion 6.
The discharging means (not shown) for discharging from the storage part 2 to the stopping part 6 via the rail 4 is, for example, a known means disclosed in Japanese Patent No. 2997865 previously developed by the present applicant, or And a known means disclosed in the above-mentioned Japanese Patent Publication No. 4-35306.
The rail 4 is unitized so that it can be exchangeably attached to and detached from the machine base 1. As described above, as the screws S, for example, in the case of small screws, the outer diameter of the shaft portion Sa is 1 mm, 1.2 mm, 1.4 mm, 1.7 mm, 2 mm, 2.3 mm, 2 mm. There are fine types such as .6 mm and 3 mm. To cope with these types, a plurality of types of rails 4 corresponding to the outer diameter of the screws S are prepared, and the plurality of types of rails 4 are exchangeable. ing.
[0011]
Next, the bit guide portion G according to the embodiment of the present invention will be described in detail. As shown in FIGS. 1 to 4, the bit guide portion G is provided to face the discharge direction R of the screws S so as to block the discharge direction R. A sliding member 10 having a sliding surface 11 that can reach Sb, and a bit B is provided on the left and right in the discharge direction on the sliding surface 11 side of the sliding member 10, and a bit B reaches the head Sb of the screw S. A pair of chips 20, 20, which are formed so as to be movable relative to each other so as to guide the bit B so that the bit B can pass therethrough, and to make the width D of the guide port 21 variable. And a lock mechanism 30 for locking the sliding port 10 at a moving position where the guide port 21 has the required width D.
The sliding contact member 10 is formed by bending a substantially rectangular metal plate at the center, and the sliding contact surface 11 has a bent line 12 extending from the upper side to the guide port 21 of the chip 20, and has a V-shaped cross section. It is composed of two substantially rectangular planes symmetric with each other (11a and 11b in FIG. 3). Further, the sliding contact surface 11 is formed so as to be gradually lowered toward the stop portion 6 side. Reference numeral 14 denotes an attachment piece which is integrally bent and formed on the upper portion and is extended and attached to the machine base 1. In the attached state, the sliding contact surface 11 keeps a slope that gradually decreases toward the stop portion 6 side. It is extended at an angle. The mounting piece 14 is provided with a pair of mounting holes 15 through which mounting bolts (16 in FIG. 1) are inserted.
[0012]
The tip 20 is formed of a substantially right-angled triangular metal plate, and is slidably disposed on the sliding contact surface 11 of the sliding contact member 10 so that the oblique sides 23 face each other. Thereby, the guide opening 21 is formed between the lower apex angles 22. The lower apex angle 22 is slightly cut away so that the bit B can slide. Also, the bit B is slid in contact with an adjacent portion (the oblique side 23) of each chip 20 adjacent to the sliding contact member 10 so that the interval between the adjacent portions of each chip 20 decreases toward the guide port 21. Thus, a guide surface 24 for guiding to the guide port 21 is formed. That is, the guide surface 24 is formed by the oblique side 23.
[0013]
The lock mechanism 30 is formed in the sliding contact member 10 and extends along the moving direction of the chip 20, a bolt 32 protruding from the back surface of the chip 20 and penetrating the long hole 31, and inserted into the long hole 31. And a nut 33 which is screwed to the bolt 32 and fastens the chip 20 to the sliding contact member 10 by tightening. By moving the bolt 32 into the long hole 31, the two chips 20 approach and separate from each other, the width D of the guide port 21 becomes variable, and the tip 20 is moved to the required width D by tightening the nut 33. Is locked with respect to the sliding member 10 at the moving position.
[0014]
Therefore, when using the screw feeder according to this embodiment, first, as shown in FIG. 1, a unit of the rail 4 corresponding to the outer diameter of the screw S supplied by the screw feeder is prepared in advance. Then, attach it to the screw feeder. Also, as shown in FIG. 4, the width D of the guide port 21 is adjusted in accordance with the outer diameter d of the bit B from which the screws S are taken out (FIGS. 10 and 11). In this adjustment, the nut 33 is loosened, the bolt 32 is moved in the long hole 31, the two chips 20 are moved toward and away from each other, the width D of the guide port 21 is changed, and the guide port 21 has the required width D (D1). The nut 33 is tightened and locked to the sliding contact member 10 at the moving position where At this time, the width D of the guide port 21 is symmetrical with respect to the center line P of the screws S when viewed from the front (FIG. 4), and rattling when the bit B passes is reduced. As described above, the bit B is allowed to reach the head Sb of the screws S with an appropriate clearance. In this case, the width adjustment is performed by a simple operation of loosening the nut 33 to move the chip 20 and tightening the nut 33 again, so that the adjustment operation is extremely easily performed.
[0015]
In this state, when the screw S is taken out from the bit B using the screw feeder, the following is performed. In the screw feeder, the screws S are sequentially discharged from the internal storage portion 2 through the rail 4, and when the discharged screws S reach the stop portion 6 of the rail 4, the screws S move by the stopper 5. Is stopped. In this state, when the bit B is pressed against the sliding contact surface 11 of the sliding member 10 of the bit guide portion G, the bit B slides on the sliding contact surface 11 and is guided by the guide surface 24 of the chip 20 to guide the bit 21. And is guided by the guide port 21 to engage with the head Sb of the screws S. Thus, the screws S are taken out.
In this case, the bit B is guided by the sliding contact surface 11, the broken line 12, the guide surface 24, and the guide opening 21 to reach the head Sb of the screw S, so that the bit B is securely and easily engaged with the screw S. The take-out operation can be performed very easily.
[0016]
Next, a case where another screw S having a different outer diameter of the shaft portion Sa of the screw S is supplied will be described. Now, as shown in FIG. 5, a case where the present invention is applied to a screw S having a larger outer diameter than the screw S shown in FIG. 4 will be described. First, as shown in FIG. A unit of the rail 4 corresponding to the outer diameter of the screws S to be prepared is prepared, and this is mounted on the screw supply machine. Further, the width D of the guide port 21 of the bit guide portion G is adjusted according to the outer diameter of the bit B from which the screws S are taken out. In this adjustment, as shown in FIG. 5, the nut 33 is loosened, the bolt 32 is moved in the long hole 31, and both chips 20 are moved close to and away from each other (in FIG. 5, the chips 20 are separated from the state of FIG. 4). ), The width D of the guide opening 21 is changed, and the nut 33 is tightened and locked to the sliding contact member 10 at the moving position where the guide opening 21 has the required width D (D2). Also in this case, similarly to the above, the width adjustment is performed by a simple operation, and the adjustment operation is extremely easily performed.
Thus, for example, in the case of small screws, the outer diameter of the shaft portion Sa is 1 mm, 1.2 mm, 1.4 mm, 1.7 mm, 2 mm, 2.3 mm, and 2.6 mm as the screws S. , 3 mm, etc., when handling screws S having different outer diameters of the shaft portions Sa of the screws S, the rail 4 is replaced and the guide port 21 of the bit guide portion G is replaced. By adjusting the width D, it can be easily handled. For this reason, unlike the related art, it is possible to cope with bits B having various thicknesses with one bit guide portion G without preparing a bit guide portion corresponding to the type of the bit B every time. The number of parts is reduced, the management becomes easy, and the work efficiency is improved because there is no need to replace the bit guide portion G.
[0017]
FIG. 6 shows another example of the bit guide portion G. This is substantially the same as described above, but different from the above, the sliding contact surface 11 of the sliding contact member 10 is formed by one plane. This also provides the same operation and effect as described above.
In the above-described embodiment, the shape of the sliding contact member 10 and the shape of the tip 20 are not limited to the above-described shapes, and may be appropriately changed. For example, as shown in FIG. 7, the chip 20 may be formed in a square bar shape.
In addition, it is needless to say that the configuration of the lock mechanism 30 is not limited to that described above.
[0018]
【The invention's effect】
As described above, according to the screw feeder of the present invention, the bit reaches the head of the screw by adjusting the width of the guide holes of the tips provided on the left and right sides of the sliding contact surface of the sliding member in the bit guide portion. When supplying different types of screws, even if the size of the bit is different, one bit guide can be used without preparing a bit guide corresponding to the type of bit. It is possible to cope with bits of various thicknesses, so that the number of parts can be reduced, the management can be facilitated, and the work of replacing the bit guide portion is unnecessary, so that the work efficiency is improved. be able to.
When a guide surface for guiding the bit to the guide opening by sliding the bit in an adjacent portion adjacent to the sliding contact member of each chip is formed, the bit is guided by the sliding contact surface, the guide surface, and the guide opening. Since the screws can reach the heads, the screws can be reliably and easily engaged with the screws, and the take-out operation can be performed extremely easily.
[0019]
Also, when the sliding surface of the sliding member is formed so as to be gradually lowered toward the stop portion side, the bit slides along the slope, so that the bit can be easily moved to the head of the screw. Performance can be improved.
Further, when the sliding contact surface of the sliding contact member is constituted by two planes having a V-shaped cross section having a polygonal line from the upper side to the guide opening of the chip, the bit can be easily slidably contacted with the polygonal line, and the polygonal line Since the bit is a straight line, the bit can be surely moved, and the operability can be improved.
Furthermore, the locking mechanism is screwed into a long hole formed in the sliding contact member along the moving direction of the chip, a bolt protruding from the back surface of the chip and penetrating the long hole, and a bolt inserted into the long hole. In the case where a nut is provided for fixing the chip to the sliding contact member by tightening, the mechanism can be simplified and the chip can be moved and locked.
In addition, when a plurality of types of rails each having a stop portion formed at the distal end portion are prepared so as to correspond to screws of various sizes, and the plurality of types of rails are exchangeable, different types of screws are supplied. In this case, the replacement work is facilitated and the work efficiency can be improved.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a plurality of types of rail units capable of replacing a screw feeder according to an embodiment of the present invention.
FIG. 2 is a perspective view showing a bit guide section of the screw feeder according to the embodiment of the present invention.
FIG. 3 is an exploded perspective view showing a bit guide portion of the screw feeder according to the embodiment of the present invention.
4A and 4B are diagrams showing a bit guide portion of the screw feeder according to the embodiment of the present invention together with the operation thereof, wherein FIG. 4A is a front view and FIG. 4B is a side sectional view.
FIG. 5 is a front view showing a bit guide portion of the screw feeder according to the embodiment of the present invention together with its operation.
FIG. 6 is a perspective view showing another bit guide portion of the screw feeder according to the embodiment of the present invention.
FIG. 7 is a perspective view showing another bit guide portion of the screw feeder according to the embodiment of the present invention.
FIG. 8 is a perspective view showing an example of a conventional screw feeder.
FIG. 9 is a perspective view showing an example of a bit guide section of a conventional screw feeder.
FIG. 10 is a diagram illustrating an example of a driver bit.
FIG. 11 is a view showing an example of a bit of an air suction type tool.
[Explanation of symbols]
S Screws Sa Shaft Sb Head 1 Machine base 2 Housing 3 Groove 4 Rail 5 Stopper 6 Stop G Stop bit Gap 10 Sliding member 11 Sliding surface 12 Folding line 14 Mounting piece 20 Chip 21 Guide port 22 Apex angle 23 Hypotenuse 24 guide surface 30 locking mechanism 31 long hole 32 bolt 33 nut

Claims (7)

A stop portion for sequentially discharging screws having a head portion and a shaft portion from an internal housing portion and stopping the screws at a predetermined position with the head portion of the screw portion up and the shaft portion down, and an upper portion of the stop portion And a bit guide portion for guiding a bit at the tip of a tool for taking out the screws located at the stop portion.
A sliding member provided with the bit guide portion facing the discharging direction of the screws so as to block the discharging direction of the screws, the sliding member having a sliding contact surface in which the bit slides and can reach the head of the screws; A guide port is provided on the left and right sides in the discharge direction of the sliding contact surface side of the sliding contact member and guides the bit so that the bit can reach the head of the screw. A pair of chips movably provided relative to each other so as to be variable in width, and a lock mechanism for locking the chips with respect to the sliding contact member at a movement position where the guide opening has a required width. A screw feeder characterized by comprising. A guide for slidably contacting a bit with an adjacent portion of each of the chips adjacent to the sliding contact member so that the interval between the adjacent portions of the chip is reduced toward the guide opening, and guiding the bit to the guide opening. The screw feeder according to claim 1, wherein a surface is formed. The screw feeder according to claim 1 or 2, wherein a sliding contact surface of the sliding contact member is formed so as to be gradually lowered toward the stop portion side. The screw feeder according to claim 3, wherein the sliding contact surface of the sliding contact member is constituted by one plane. 4. The screw feeder according to claim 3, wherein the slide contact surface of the slide contact member is constituted by two planes each having a bent line extending from the upper side to the guide port of the chip and having a V-shaped cross section. The lock mechanism includes a slot formed in the sliding contact member and extending along the moving direction of the tip, a bolt protruding from the back of the tip and penetrating through the slot, and a bolt inserted into the slot. 6. The screw feeder according to claim 1, further comprising a nut for screwing and fixing said chip to a sliding member by tightening. The groove has a groove protruding from the inside of the housing part to the outside and having a shaft part of the screw inserted from the upper side. A rail for guiding screws is provided, the stop is formed at the tip of the rail, and a plurality of types of rails are prepared for screws of various sizes, and the plurality of types of rails can be replaced. The screw feeder according to claim 1, 2, 3, 4, 5 or 6, wherein:

Images