JPS5941022Y2 - Screw feeding device for driver tools - Google Patents

Description

[Detailed description of the invention] The present invention uses screws that are pre-implanted in a row at regular intervals in a synthetic resin belt at the tip of an electric or pneumatic dry blower for screwing screws into a mating member. , relates to a device that automatically feeds screws one by one in accordance with the screwing operation.

The conventional screw feeding device disclosed in U.S. Pat. No. 4,059,034 has a pair of left and right screws that mesh with a belt in which screws are implanted one by one, and feed the belt intermittently at intervals between the screws. The feed wheel is provided with a ratchet mechanism, and by the movement of pressing the dry blower against the mating member, both feed wheels are intermittently rotated via the ratchet mechanism to feed the belt one pitch at a time. The screw was automatically supplied to the tip of the driver bit in the drying tool.

That is, this known screw feeding device automatically feeds screws by intermittently rotating the feed wheel using motion during the pressing when pressing the dry blowing tool against the mating member. Therefore, when pressing the dry hair tool, the screw should be supplied to the tip of the driver bit as soon as the tip of the driver bit approaches the belt. In other words, the driver bit of the dry hair tool should press against the belt. Before reaching the point, a feed stroke for intermittently rotating the feed wheel by one pitch must be provided at the beginning of the stroke. The distance must be equal to the screw-in stroke of the screw that engages the head of the screw and then screws the screw into the mating member, plus the aforementioned feed straw, and a large push becomes a stroke. The screw feeding device attached to the tip of the dry blower is large and heavy, and in addition to the large stroke of the pressing device, the large and heavy feeding device makes manual handling difficult and makes it difficult to screw in. This reduced workability.

The present invention is a screw feeding device attached to an electric or pneumatic driver tool, in which a belt in which screws are embedded at regular intervals is fed one pitch at a time by intermittent rotation of the feed wheel, and the driver bit of the drying tool is fed intermittently one pitch at a time. When feeding screws one by one to the tip of the belt, the pressing of the dry tool is not related to the stroke, but the return stroke when separating the screw from the mating member after it has been screwed into the mating member. By performing an intermittent pinch rotation at the end of the return stroke, the pressing stroke is shortened and the workability of screwing is improved.

The drawings of the embodiments will be explained below. In the drawings, 1 is an electric or pneumatic type dryer tool which has conventionally been widely available on the market. A driver bit I is protruded from the mounting screw part 4 and is rotatably driven by a switch 6 in the nozzle part 5.

8 is a belt made of soft synthetic resin in which drill screws 10 for screwing into a mating member 9 are implanted in a line at appropriate intervals P, and on both longitudinal sides of the belt 8, there are provided at intermediate positions of the drill screws 10. Notches 11 are provided at the same intervals as the drill screw, and a plurality of cutting lines 12 are provided on the belt 8 radially from the drill screw insertion hole, and by pressing the drill screw 10 from its head toward the shank. , the drill screw 10 can be easily removed from the belt 8.

Reference numeral 13 denotes a screw supply device, which is used for the dry blowing tool 1.
A cylindrical adapter 15 is screwed onto the mounting screw portion 4 so as to fit onto the driver bit 7, and is fixed at an appropriate position in the downward axial force direction of the screw portion 4rc by a locking nut 14; It consists of a sleeve-shaped goose 16 that is slidably fitted on the outside of the adapter 15, and long groove holes 1γ, 18 of appropriate lengths LL1 are bored in the left and right sides of the sleeve-like goose 16 in the axial direction. The long hole 17°1
By planting the guide pin 19.20 inserted into the adapter 15 in the case 16, the adapter 15 can reciprocate within the case 16 by a distance of the length Ll of the long slot 17.18. At the same time, a spring 21 is provided in the case 16 to press and bias the adapter 15 in the direction of protruding from the case 16, so that when the adapter 15 is protruded to its maximum extent, the guide pins 19 and 20 are inserted into both long slot holes 17 and 18.
It is configured so that it abuts on the starting end portions 17' and 18' and does not protrude any further.

A feed shaft 24 perpendicular to the axis of the driver bit γ is rotatably attached to a pair of left and right brackets 22 and 23 attached to the front end surface of the sleeve case 16 to a position appropriately shifted from the axis of the driver bit 1. A pair of feed wheels 25 and 26 are fixed to the feed shaft 24, which is rotatably supported between both brackets 22 and 23, at the same interval as the width S of the belt 8, and around the outer periphery of both of the feed wheels 25 and 26. is a protrusion 2 that engages with a notch 11 on the belt 8.
A plurality of T's are provided along the circumference at the same intervals as the notches 11, and a leaf spring 28 attached to the sleeve teeth 16 is pressed tangentially onto the outer periphery of both feed wheels/L/25.26. However, this leaf spring 28 is provided with a locking part 28' that fits between the two protrusions 27, 27 of the wheel, so that the rotation of both wheels is temporarily stopped at the interval between each protrusion 27. do.

At the ends of both brackets 22 and 24 of the housing, belt guide parts 29 and 30 are provided, which are bent inwardly.
In inserting the belt 8 so as to contact the inner surfaces of both belt guide parts 29, 30, the belt 8 is inserted from the inner surfaces of both brackets (22, 24) on the entrance side to both feed wheels 25, 26. A pair of guide pins 31, 32 protruding in the direction are used to wrap around a part of the feed wheel 25, 26, while both feed wheels 2
5.26 On the exit side from both brackets 22.24
A pair of guide pins 33. which protrude inwardly from the inner surface of the.
When the drill screw 10 in the belt 8 is pushed out and screwed into the mating member 9 with the driver bit 7, the tip i part of both brackets 22° 24 (') is configured to be detached from the feed wheel 25° 26 at 34. Screw holding mechanism 35 for holding the drill screw 10 (details will be described later)
is installed.

A ratchet wheel 36 having the same number of teeth 3T as the protrusions 27 of the feed wheel 25, 26 is fitted onto the shaft end of the feed shaft 24 protruding from one bracket 24.

Further, one long slot 1 in the sleeve case 16
A feed rod 38 is disposed on the side surface of the sleeve case 16, and the feed rod 38 is supported slidably in the axial direction of the sleeve case 16 by a pair of guide members 39°40 fixed to the sleeve case 16. The ratchet wheel 3 is attached to the tip of the rod 38.
ratchet pawl 4 having a pin 41 that engages with teeth 3T of 6;
A torsion spring 45 is wound around a pin 44 which is attached to the feed rod 38, and the ratchet pawl 42 is automatically pivoted around a pin 43.
Press the feed rod 38K so that it is always in contact with the stopper pin 46, and in this state, tighten the ratchet pawl 4.
42 pins 41 are configured to engage with the teeth 37 of the ratchet wheel 36, while the feed rod 38 is provided with a length t shorter than the long groove hole 38 of the sleeve case 16 along the direction of the sliding force. Drilling a long groove hole 4T with length L2,
By inserting the guide pin 20 into the long groove hole 47, the feed rod 38 is moved forward in the direction of the ratchet wheel 36 by an appropriate distance t near the end of the pushing stroke of the adapter 15 into the sleeve case 16. The feed rod 38 is configured to move backward from the forward position to the original position 1 near the end of the return stroke of 15.

Note that the screw holding mechanism 35 and both brackets 22.2
4, and a nose body 50 attached to the tips of both guide bodies 48, 49,
Screw guide holes 51 and 52 are respectively formed between the two pairs of guide bodies 48 and 49 and in the nose body 50 along the axial direction of the driver focus T, while the nose body 50 has screw guide holes 51 and 52 formed at right angles to the guide holes 52. A hole 53 with a square cross section is bored in the direction, and a pair of left and right gripping pieces 54 with a square cross section are inserted into the square hole 53.
55 is slidably inserted, and both gripping pieces 54 and 55 are pressed inwardly by an elastic ring body 56 such as a rubber O-ring fitted to the nose body 50, and both gripping pieces 54 and 55 are pressed inwardly. 54.
55 are brought into contact with each other on the axis of the guide hole 52, and semicircular grooves are provided in each of the mutually abutting end surfaces to form a guide hole 57, and the entrance side of the guide hole 57 is The opening of the guide body 48, 49 to the guide hole 51 is formed into a tapered hole 58.

Further, a butt 59° 59 made of a soft material such as a soft synthetic resin is provided on the tip end surface of the nose body 50 in order to prevent damage to the mating member 9 when the nose body 50 is pressed against the mating member 9. ing.

In this configuration, the belt 8 in which the drill screws 10 to be screwed into the mating member 9 are implanted in a row is attached to the feed wheel 25.2 of the screw supply device 13 as shown in FIG.
At this time, the belt 8 is inserted into the pair of guide pieces 60 and 60 provided on the side of the sleeve case 16.
(guided along the side surface of the sleeve case 16), the nose body 50 of the screw holding mechanism 35
is pressed against a predetermined screwing position on the mating member 9, and then the driver bit T and the adapter are pressed against the mating member 9 in the direction of arrow A while rotating the driver bit 7. 15 moves forward while encircling the spring 21 in the sleeve case 16,
When the tip engaging portion T' of the driver focus T engages with the retaining groove of the head of the drill screw 10 on the belt 8 that has been supplied in advance in front of it, and the pressing further progresses,
By pushing out the drill screw 10 in the direction of the mating member 9, the drill screw 10 comes out of the belt 8 and advances toward the screw holding mechanism 35 in front of the belt 8, as shown in FIG. When passing through the guide hole 57 between the gripping pieces 54 and 55, the gripping pieces 54 and 55 are pushed apart to the left and right against the elasticity of the elastic ring body 56, so that the drill screw 10 is forced into the mating member 9. The drill screw 10 is held in such a way that it does not tilt, and while being rotated in this state, the drill portion at the tip of the shank is pressed against the mating member 9 as shown in FIG. In other words, when the stroke L1 reaches the maximum, the guide pin 19 implanted in the adapter 15
．． 20 is a long slot 17.18 in the sleeve case 16
When it comes into contact with the terminal end portions 17'' and 18'' of the connector, it is completely screwed into the mating member 9 as shown in FIG.

On the other hand, when this pressing is near the end of stroke L1,
When the pin 20 implanted in the adapter 15 comes into contact with one end 47 of the long groove hole 4T in the feed rod 38, the feed rod 38 moves forward toward the ratchet wheel 36 with an appropriate dimension t at the same time as the screwing is completed. However, at this point, the feed wheels 25 and 26 are prevented from rotating in reverse by the leaf spring 28, and the pin 41 of the ratchet pawl 42 attached to the feed rod 38 is torsion spring 45 when the feed rod 38 moves forward. 14, the feed rod 38 moves forward without rotating the feed wheel 25, 26 in the opposite direction. During the backward movement, the pin 41 of the ratchet pawl 42 is in a position to engage the teeth 31 of the ratchet wheel 36.

When the screwing of the drill screw 10 into the mating member 9 is completed in this way, the driver pin γ and the adapter 15 are moved to the guide pin 1 by the repulsive force of the spring 21 by moving the dry blow tool 1 backward in the direction opposite to the arrow A.
9.20 is retracted to the initial position where it comes into contact with the starting end 11', 1'' of the elongated hole 17.18, and near the end of this retraction, the guide pin 20 touches the elongated hole 4γ in the feed rod 38. The feed rod 38 is moved backward from the forward position relative to the ratchet wheel 36 to its original position by coming into contact with the other end 4γ'.

As the feed rod 38 moves backward, the pin 41 of the ratchet pawl 42 at its tip engages with the teeth 37 of the ratchet wheel 36, rotating it one pitch.
Rotate both feed wheels 25 and 26 linked to 6 by one pitch to feed the belt 8 -pinch p to the next drill screw 1.
0 on the axis of the driver bit 7 automatically.

That is, in order to press the drying tool 1 against the relative member 9, the ratchet pawl 42 is moved forward with respect to the ratchet wheel 36 during the stroke, and during the return stroke after screwing is completed, the ratchet pawl 42 is pressed against the relative member 9. Since the ratchet wheel 36 and the feed wheels 25 and 26 are rotated one pitch to supply screws,
For pressing the dry blower 1 against the mating member 9, there is no need to provide a feed stroke in the stroke 1 as in the above-mentioned conventional method.

In the above embodiment, the feed rod 38 is associated with the adapter 15 by the guide pin 20 implanted in the adapter 15 and the long slot 4T in the feed rod 3BVC, but the present invention is not limited to this. The feed rod 38 and the adapter 15 may be associated with each other by other means such that the feed rod 38 is advanced when the adapter 15 moves forward, and is moved back from the forward position when the adapter 15 is retreated. If you do this manually instead of automatically supplying the feed rod, you can remove the feed rod 38 and the ratchet wheel 36 by simply attaching a handle wheel to the place where the ratchet wheel is attached to the feed shaft 24. .

As described above, according to the present invention, the pressing stroke when screwing in a screw with the dry blowing tool can be shortened by the feed stroke compared to the conventional one, so the screw feeding device attached to the dry blowing tool can be made smaller and lighter. Moreover, in addition to the screw feeding device being small and lightweight, the pressing speed is short.
It has the effect of making it easier to handle and significantly improving the workability of screwing.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is an overall view of the screw feeding device when it is attached to a drying tool, Fig. 2 is a box view of the screw feeding device, and Fig. 3 is a part of Fig. 2. Fig. 4 is a cross-sectional view along the [V-■ plane in Fig. 2, Fig. 5 is a sectional view along the v-v plane in Fig. 3, and Fig. 6 is a cross-sectional view taken along the VI-Vl plane in Fig. 5. Figure 7 is a cross-sectional view taken along ■-■ in Figure 5; Figure 8 is a cross-sectional view taken along ■-■ of Figure 5; Figure 10 is the X in Figure 9.
-X plane sectional view, FIGS. 11, 12, and 13 are sectional views showing the working state, and FIG. 14 is a view when screwing is completed. 1... Dry bait tool, 4... Mounting screw part, 7...
・Driver bit, 8...belt, 10...screw,
15...Adapter, 16...Sleeve case, 21
...Spring, 22.23...Bracket, 24...
Feed shaft, 25° 26--Feed wheel, 36... Ratchet wheel, 38... Feed rod, 42... Ratchet claw, 20... Guide pin, 47... Long slot hole.

Claims (1)

[Scope of utility model registration request] The driver bit consists of an adapter screwed onto the threaded part from which the driver bit protrudes, a sleeve case that slidably fits into the adapter, and a spring that biases the sleeve case in the protruding direction. A feed wheel is provided at the tip of the belt, which feeds a belt in which screws are inserted in a line in advance, one by one at intervals of the screws, and a ratchet wheel is provided that interlocks with the feed wheel. is provided slidably in the axial direction of the sleeve case, and the feed rod is attached to the adapter so that when the adapter moves forward, it moves forward toward the ratchet wheel, and the adapter moves backward from the forward position with respect to the retracting ratchet wheel. A screw supply device for a dry blower tool, wherein the feed rod is provided with a ratchet pawl adapted to intermittently rotate the ratchet wheel by the distance between the screws in the belt during reversing.