JPH10329049A - Screw driving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a screw driving device which can be used for a wide range of screws from short screws to long screws only by addition of a very simple means. SOLUTION: A screw driving device is provided with a tubular casing 1 fitted at the front end part of a driver tool, a sliding member 2 which is inserted in the casing 1 so as to be capable of slinding freely through a return spring 5, and a screw retaining belt feeding mechanism 30 which is formed at the sliding member 2 and feeds a screw retaining belt 55 one by one pitch of screw retaining intervals, and formed so that when the sliding member 2 is pressed against the member to be driven and the sliding member 2 is pushed into the casing 1 against the return spring 5, the screw retaining belt feeding mechanism 30 is operated to feed the screw retaining belt 55 only by one pitch, and a screw which is retained by the screw retaining belt 55 and fed to a driving position may be driven into the member to be driven. A sliding member stopping means 20 which stops the sliding member 2 from being pushed into the casing 1 is formed at the casing 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw driving device which is mounted on a driver tool and is capable of continuously driving one screw at a time in a row on a screw holding belt. The present invention relates to a screw driving device applicable to a wide range of screw lengths from short screws to long screws.

[0002]

2. Description of the Related Art A screw driving device of this kind includes a cylindrical casing attached to the tip of an electric screwdriver tool,
A sliding member slidably fitted into the casing via a return spring, and a screw holding belt feed mechanism provided on the sliding member for feeding the screw holding belt by one pitch of a screw holding interval, The sliding member is pressed against the driven member, and when the sliding member is pushed into the casing against the return spring, the screw holding belt feed mechanism operates to move the screw holding belt to one. The screw is held by the screw holding belt and sent to the driving position by a driver bit attached to the electric driver tool, and is driven into the driven member by a pitch.

[0003] By the way, the screw used in this type of screw driving apparatus has a length of 1/2 inch (12.7 mm) to 1 inch.
Short screws of about inch (25.4 mm) accounted for the majority, but in recent years, the material of the screw holding belt and the shape of the holding part have been improved, and the range of use has been extended to long screws of 40 mm to 50 mm. . Although several screw driving devices that can be used for long screws have been proposed, a single device can be used from 1/2 inch (12.7 mm) to 2 inches (50.8 inch).
Screw driving devices applicable to a wide range of screw lengths (mm) have not yet been developed. The reasons are as follows.

(A) If the sliding range of the sliding member is increased for application to a long screw, the compression resistance of the return spring increases, and the burden on the operator increases, making continuous driving difficult. , And also increase the overall length of the device,
Use in scaffolding work becomes difficult.

(B) On the other hand, when the spring pressure of the return spring is reduced to reduce the compression resistance when the sliding member is pushed into the casing, the sliding member comes into contact with another object. At times, the screw holding belt may be pushed in unexpectedly, causing a half-feed phenomenon to the screw holding belt, which may cause a trouble such as a failure of the device or a poor driving.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and solves the above-mentioned problems by very simple means. The present invention is applicable to a wide range of screws from short screws to long screws. It is an object of the present invention to provide a screw driving device which can be used.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a cylindrical casing attached to the tip of an electric screwdriver tool, and slidably fits in the casing via a return spring. A sliding member to be inserted, and a screw holding belt feeding mechanism provided on the sliding member for feeding a screw holding belt by one pitch of a screw holding interval, and pressing the sliding member against a member to be driven, When the moving member is pushed into the casing against the return spring, the screw holding belt feeding mechanism operates to feed the screw holding belt by one pitch, and then the screw holding belt is mounted on the electric screwdriver tool. In a screw driving device configured to drive a screw held by the screw holding belt and sent to a driving position by a driver bit into the driven member, the casing includes a casing. The sliding member is characterized in that the slide member stop means are provided to stop from being pushed into the casing.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a screw driving device according to the invention. The screw driving device has a cylindrical casing 1 and a sliding member 2 slidably fitted in the casing 1, and the sliding member 2 includes a spring receiving cylinder 3 provided at a rear portion thereof. A return spring 5 interposed between the rear wall 4 in the casing 1 and the rear spring 4 constantly urges the front to project forward. In use, the cylindrical body 6 connected to the rear wall 4 of the casing 1 is an electric screwdriver tool (not shown).
And the driver bit 7 of the electric screwdriver tool
Penetrates the rear wall part 4 and the spring receiving cylinder 3 as shown in the figure,
The screw holding belt 55 provided at the tip of the sliding member 2 extends to the vicinity of the guide passage 8.

As shown in FIG. 6, the screw holding belt 55 is provided with a plurality of holding cylinders 56 which are arranged in a row at a constant pitch and hold the screws S through an elongated belt-like body made of a soft synthetic resin material. At the same time, the notch portions 57 are formed at the same pitch as the holding cylinder portion 56 along both side edges of the belt-like body,
And it is provided at an intermediate position of each holding cylinder 56. Then, the belt holding belt 55 passes the sliding member 2 through a guide passage 8 formed between belt guide walls 9 and 10 having upper and lower sides facing each other and having a U-shaped cross section provided at the upper end of the sliding member 2. The screw holding belt 55 is transported intermittently one pitch at a time by the screw holding belt feeding mechanism 30 incorporated in the sliding member 2 and guided in the horizontal direction, and the screw S sequentially faces the tip of the driver bit 7. It is sent to the driving position. The screw holding belt feed mechanism 3
Details of 0 will be described later.

As shown in FIGS. 2 and 3, the sliding member 2 has a guide groove 11 provided on the side surface of the sliding member 2 and extending in the longitudinal direction. It is slidable within a range restricted by the stop pin 12. And attached to the rear end of the sliding member 2,
The sliding member 2 is moved to a position where a stopper rod 13 extending rearward passes through a through hole 14 provided in the rear wall portion 4 of the casing 1 and comes into contact with an adjusting ring 15 screwed to the cylindrical body 6. 1, and by changing the position of the adjusting ring 15 according to the length of the screw S used,
The pushing depth of the sliding member 2, that is, the screwing depth of the driver bit 7 can be adjusted. Further, as shown in FIG. 8, a screw portion 16 is provided at the base end of the stopper rod 13, and the length of screwing the screw portion 16 into a screw hole 17 provided at the rear end of the sliding member 2 is adjusted. The push-in depth of the sliding member 2 can be adjusted by changing the length of the stopper rod 13 extending from the sliding member 2 while being fixed with the lock nut 18. As described above, by changing the position of the adjusting ring 15 and adjusting the length of the stopper rod 13 together, the amount of adjustment of the adjusting ring 15 is not greatly increased, and thus the entire length of the screw driving device including the adjusting ring 15 is reduced. The pushing depth of the sliding member 2 into the casing 1 can be adjusted over a wide range without increasing.

On the other hand, when the pushing depth of the sliding member 2 is long (that is, when a long screw is driven in), the burden on the operator is reduced, so that the spring pressure of the return spring 5 is extremely small as compared with the conventional device. The compression resistance of the return spring 5 is set small. However, when the spring pressure of the return spring 5 is reduced, as described above, when the sliding member 2 comes into contact with another object,
The screw holding belt 5 is unexpectedly pushed into the casing 1 and
5 may cause a trouble such as a failure of the device or a defective driving. Therefore, in order to prevent such an unexpected pressing operation, the sliding member 2 is pressed when the screw driving device is not used. A sliding member stopping device 20 that can stop the operation is provided in the casing 1.

As shown in FIG. 4, the sliding member stopping device 20 has a tubular body 21 fixed to the outer wall of the casing 1 and protrudes into the casing 1 through the tubular body 21. The stopper pin 22 is provided with two annular grooves 23 and 24 on the outer peripheral surface of the stopper pin 22 at predetermined intervals in the axial direction. 25 are provided. On the other hand, the cylindrical body 21
Is mounted with a sphere 26 which engages with the annular groove 23 or 24 to lock and hold the stopper pin 22 at a predetermined position. The sphere 26 is urged toward the center of the stopper pin 22 by a pressing spring 27. I have. Then, as shown by the solid line in FIG. 4, the knob 25 is pulled out to pull out the stopper pin 22 to the outside,
At the release position where the sphere 26 is engaged with the annular groove 24, the tip of the stopper pin 22 retreats from inside the casing 1, and the sliding member 2 can be pushed into the casing 1. On the other hand, as shown in the imaginary line of FIG. 4 and FIG. 2, the knob 25 is pushed to cause the stopper pin 22 to protrude into the casing 1 and the sphere 26
Is in the operating position where the stopper pin 2 is engaged with the annular groove 23.
2 comes into contact with the rear end of the sliding member 2, and the sliding member 2 is brought into a stop state where it cannot be pushed into the casing 1. Therefore, even if the leading end of the sliding member 2 comes into contact with another part, it is not accidentally pushed.

Next, the screw holding belt feeding mechanism 30 will be described. As shown in FIGS. 5 and 6, the feed mechanism 30 is disposed in the lower portion of the sliding member 2 in parallel with the spring receiving cylinder 3 and has both ends rotatably pivotally supported. And a pin 3 protruding downward at an intermediate portion of the operating shaft 31.
2 is protruded, and a ratchet wheel 34 is rotatably fitted to the front end portion via a one-way clutch 33. When the operating shaft 31 rotates in the direction of arrow A in FIG. It only rotates together. As shown in FIG. 6, the ratchet wheel 34 has six feed claws 35 on its front surface.
Are projected radially at the same interval, and the two feed claws 35 located on the upper side are guided through a notch 36 provided at the center of the lower guide wall 10 forming the guide path 8. And engages with two notches 57, 57 on the lower side of the screw holding belt 55 which is fed along the guide passage 8. Further, six hemispherical engagement concave portions 37 are provided on the front surface of the ratchet wheel 34 so as to correspond to the feed claws 35. on the other hand,
As shown in FIG. 5, two receiving holes 3 corresponding to the engagement recesses 37 are formed in the front wall 2a of the sliding member 2 to which the ratchet wheel 34 is adjacent.
8, 38 are provided, and a pair of spheres 40, 40 are inserted into the two receiving holes 38, 38 via press springs 39, 39, respectively.
The spheres 40, 40 are accommodated in a posture biased to the four sides.
Are engaged with a pair of diametrically opposed engagement recesses 37, 37 to stop the positioning of the ratchet wheel 34.

On the other hand, as shown in FIG. 3, a guide groove 41 guided by the engagement of the pin 32 is formed in the bottom of the casing 1.
And an inclined guide slot 42 continuous with the guide groove 41.
And the casing 1 continues to the inclined guide slot 42.
Are provided in the longitudinal direction of the guide slot 43. When the sliding member 2 is pressed against the driven member (not shown) and is pressed into the casing 1 while compressing the return spring 5, the pin 32
2 along which the operating shaft 31 is moved obliquely.
In the direction indicated by the arrow A of FIG. This operating shaft 31
The hook wheel 34 is also rotated in the direction of arrow A in conjunction with the operation, the screw holding belt 55 is fed in the horizontal direction by one pitch by the feed hook 35, and the screw S held by the holding cylinder portion 56 is screwed by the driver. It is positioned at the driving position opposite to the tip of the bit 7. In this state, when the sliding member 2 is further pushed into the casing 1 while compressing the return spring 5, the pin 32 simply moves along the guide slot 43 and the operating shaft 3
1 does not rotate. On the other hand, this pushing operation causes the driver bit 7 to relatively advance, engage with the screw S positioned and held at the driving position, and drive the driving bit 7 into the driven member while rotating it. Has become. When the driving of the screw S is completed and the sliding member 2 is separated from the driven member, the sliding member 2 returns to the original posture shown in FIGS. While moving the inclined guide slot 42, the operating shaft 31 is rotated 60 degrees in the direction opposite to the arrow A in FIG. 6 to return to the original state. At this time, only the operation shaft 31 idles due to the action of the one-way clutch 33, and the ratchet wheel 34 is locked and held by the two spheres 40, 40 engaged with the two engagement recesses 37, 37 and stopped at the fixed position. The state that has been maintained.

FIGS. 1 and 2 show actual screw driving operations.
Since the screw S positioned at the driving position protrudes from the distal end of the sliding member 2 as shown in FIG. 5, the screw protruding from the distal end of the sliding member 2 can be adjusted according to the length of the screw S. The length adjustment adapter 45 is attached to the sliding member 2.

As shown in FIG. 4, the screw length adjusting adapter 45 has a plate-like body 4 provided with a long hole 47 extending in the longitudinal direction.
A bifurcated abutting piece 48 is provided at the tip of 6, and a large number of semicircular locking projections 49 are provided in parallel along both side edges of the plate-like body 46. On the other hand, a flat engagement groove 50 for guiding and engaging the plate-like body 46 so as to be displaceable in the longitudinal direction is provided on the upper surface of the sliding member 2. A large number of semicircular concave portions 51 with which the portions 49 are engaged are provided in parallel. Then, the plate-like body 46 is engaged with the engagement groove 50, and the contact piece 48 is formed according to the length of the screw S.
After adjusting the amount of protrusion, the adapter 45 is fixed to the sliding member 2 with the wing bolt 52 inserted into the elongated hole 47. At this time, since the locking projections 49 on both sides of the plate-like body 46 are engaged with the concave portions 51 of the engagement grooves 50, the plate-like body 46 is firmly fixed without rattling. Further, since the screw length adjusting adapter 45 does not interfere with the screw holding belt 55 sent to the sliding member 2, the amount of protrusion can be easily and quickly adjusted.

[0017]

As described above, in the screw driving device according to the present invention, the casing is provided with the sliding member stopping means for stopping the sliding member from being pushed into the casing. By reducing the spring pressure of the return spring of the moving member and reducing the compression resistance when the sliding member is pushed into the casing, the sliding member can be used for a wide range of screws from short screws to long screws. Also,
If the sliding member stopping means is operated when the screw driving device is not used, there is no possibility that the sliding member may be accidentally pushed by contact with another object. In addition, by reducing the spring pressure of the return spring, the driving operation can be performed continuously without imposing a large burden on the operator in the case of a long screw.

According to the third aspect of the present invention, the adjustment of the screw length adjusting adapter can be performed easily and quickly.

Furthermore, according to the invention according to claim 4, the casing can be adjusted without greatly increasing the adjustment amount of the adjustment ring, and therefore without increasing the entire length of the screw driving device including the adjustment ring. , That is, the screw-in depth of the driver bit can be adjusted in a wide range.

[Brief description of the drawings]

FIG. 1 is a front view of a screw driving device according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a bottom view of the essential part.

FIG. 4 is an enlarged sectional view taken along line 4-4 in FIG.

FIG. 5 is a longitudinally enlarged front view of the sliding member.

FIG. 6 is a sectional view taken along line 6-6 in FIG. 5;

FIG. 7 is a perspective view of the screw length adjustment adapter.

FIG. 8 is a vertical sectional view of a main part showing a mounting state of a stop rod provided at a rear end of the sliding member.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 casing 2 sliding member 3 spring receiving cylinder 5 return spring 7 driver bit 8 guide passage 13 stopper rod 15 adjusting ring 20 sliding member stopping device 21 cylindrical body 22 stopper pin 30 screw holding belt feed mechanism 31 operating shaft 32 pin 33 One-way crunch 34 Claw wheel 35 Feeding claw 37 Engagement concave portion 40 Sphere 41 Guide groove 42 Inclined guide slot 43 Guide slot 45 Screw length adjustment adapter 48 Contact piece

[Procedure amendment]

[Submission date] October 28, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of the Invention] Screw driving device

[Claims]

3. The position of an adjusting ring screwed to a cylindrical portion connected to a rear end of the casing, wherein the pushing depth of the sliding member, that is, the screwing depth of the driver bit is changed, and 3. The screw driving device according to claim 1, wherein the screw driving device is configured to be adjustable by using the stopper rod attached to the rear end of the member together with the length of the stopper rod.

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw driving device which is mounted on a driver tool and is capable of continuously driving one screw at a time in a row on a screw holding belt. The present invention relates to a screw driving device applicable to a wide range of screw lengths from short screws to long screws.

[0002]

2. Description of the Related Art A screw driving apparatus of this kind is, for example, actually used.
JP-A-4-60667, U.S. Pat.
As disclosed in the specification of Japanese Patent No. 74, a cylindrical casing attached to the tip of an electric screwdriver tool, a sliding member slidably fitted into the casing via a return spring, A screw holding belt feeding mechanism provided on the moving member for feeding the screw holding belt by one pitch of the screw holding interval, and attached to the sliding member so as to be displaceable in the longitudinal direction.
Corresponding to the length of the screws held by the screw holding belt
The screw length to change the amount of protrusion from the tip of the sliding member
An adjusting adapter, the sliding member is pressed against the driven member, and when the sliding member is pushed into the casing against the return spring, the screw holding belt feed mechanism operates. The screw holding belt is fed by one pitch, and subsequently, the screw held by the screw holding belt and sent to the driving position is driven into the driven member by a driver bit mounted on the electric screwdriver tool. .

[0003] By the way, the screw used in this type of screw driving device has a length of 1/2 inch (12.7 mm) or more.
The short screws of about 1 inch (25.4 mm) occupied the majority, but in recent years, the material of the screw holding belt and the shape of the holding portion have been improved, and the range of use has been extended to long screws of 40 mm to 50 mm. Was. The above-mentioned Japanese Utility Model 4-60667
No. 5,284,074,
Screw drive that can drive screws of various lengths
Although a device has been proposed, one device can
A screw driving device applicable to a wide range of screw lengths from inches (12.7 mm) to 2 inches (50.8 mm) has not yet been developed. The reasons are as follows.

(A) If the sliding range of the sliding member is increased for application to a long screw, the compression resistance of the return spring increases, and the burden on the operator increases, making continuous driving difficult. , And also increase the overall length of the device,
Use in scaffolding work becomes difficult.

(B) On the other hand, when the spring pressure of the return spring is reduced to reduce the compression resistance when the sliding member is pushed into the casing, the sliding member comes into contact with another object. At times, the screw holding belt may be pushed in unexpectedly, causing a half-feed phenomenon to the screw holding belt, which may cause a trouble such as a failure of the device or a poor driving.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and solves the above-mentioned problems by very simple means. The present invention is applicable to a wide range of screws from short screws to long screws. It is an object of the present invention to provide a screw driving device which can be used.

[0007]

In order to achieve the above object, a cylindrical casing attached to the tip of a driver tool, and a sliding member slidably inserted into the casing via a return spring. And a screw holding belt feeding mechanism provided on the sliding member for feeding the screw holding belt by one pitch of a screw holding interval, and the sliding member can be displaced in a longitudinal direction.
And the screws held by the screw holding belt
The amount of protrusion from the tip of the sliding member varies according to the length of the sliding member.
A screw length adjusting adapter to be further pressed against the member to be driven , and when the sliding member is pushed into the casing against the return spring, the screw holding is performed. The belt feed mechanism operates to feed the screw holding belt by one pitch, and then, by means of a driver bit attached to the driver tool, the screw held by the screw holding belt and sent to the driving position is sent to the driven member. In a screw driving device adapted to be driven, the casing is provided with sliding member stopping means for stopping the sliding member from being pushed into the casing.

[0008] Specifically, the sliding member stopping means is,
A pin that can project freely into the casing,
Is provided so as to contact the rear end of the sliding member.
You.

In addition, the pushing depth of the sliding member,
That is, the screwing depth of the driver bit is
Adjustment ring screwed into the cylindrical part connected to the rear end of the ring
Position of the sliding member and the strike attached to the rear end of the sliding member.
It is configured to be adjustable when used together with the length of the
Have been.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a screw driving device according to the invention. The screw driving device has a cylindrical casing 1 and a sliding member 2 slidably fitted in the casing 1, and the sliding member 2 includes a spring receiving cylinder 3 provided at a rear portion thereof. A return spring 5 interposed between the rear wall 4 in the casing 1 and the rear spring 4 constantly urges the front to project forward. In use, the cylindrical body 6 connected to the rear wall 4 of the casing 1 is an electric screwdriver tool (not shown).
And the driver bit 7 of the electric screwdriver tool
Penetrates the rear wall part 4 and the spring receiving cylinder 3 as shown in the figure,
The screw holding belt 55 provided at the tip of the sliding member 2 extends to the vicinity of the guide passage 8.

As shown in FIG. 6, the screw holding belt 55 is provided with a plurality of holding cylinders 56 which are arranged in a row at a constant pitch and hold the screws S through an elongated belt made of a soft synthetic resin material. At the same time, the notch portions 57 are formed at the same pitch as the holding cylinder portion 56 along both side edges of the belt-like body,
And it is provided at an intermediate position of each holding cylinder 56. Then, the belt holding belt 55 passes the sliding member 2 through a guide passage 8 formed between belt guide walls 9 and 10 having upper and lower sides facing each other and having a U-shaped cross section provided at the upper end of the sliding member 2. The screw holding belt 55 is transported intermittently one pitch at a time by the screw holding belt feeding mechanism 30 incorporated in the sliding member 2 and guided in the horizontal direction, and the screw S sequentially faces the tip of the driver bit 7. It is sent to the driving position. The screw holding belt feed mechanism 3
Details of 0 will be described later.

As shown in FIGS. 2 and 3, the sliding member 2 has a guide groove 11 provided on the side surface of the sliding member 2 and extending in the longitudinal direction, and an engaging member fixed to the casing 1 and engaged with the guide groove 11. It is slidable within a range restricted by the stop pin 12. And attached to the rear end of the sliding member 2,
The sliding member 2 is moved to a position where a stopper rod 13 extending rearward passes through a through hole 14 provided in the rear wall portion 4 of the casing 1 and comes into contact with an adjusting ring 15 screwed to the cylindrical body 6. 1, and by changing the position of the adjusting ring 15 according to the length of the screw S used,
The pushing depth of the sliding member 2, that is, the screwing depth of the driver bit 7 can be adjusted. Further, as shown in FIG. 8, a screw portion 16 is provided at the base end of the stopper rod 13, and the length of screwing the screw portion 16 into a screw hole 17 provided at the rear end of the sliding member 2 is adjusted. The push-in depth of the sliding member 2 can be adjusted by changing the length of the stopper rod 13 extending from the sliding member 2 while being fixed with the lock nut 18. As described above, by changing the position of the adjusting ring 15 and adjusting the length of the stopper rod 13 together, the amount of adjustment of the adjusting ring 15 is not greatly increased, and thus the entire length of the screw driving device including the adjusting ring 15 is reduced. The pushing depth of the sliding member 2 into the casing 1 can be adjusted over a wide range without increasing.

On the other hand, when the pushing depth of the sliding member 2 is long (that is, when a long screw is driven in), the burden on the operator is reduced, so that the spring pressure of the return spring 5 is very small as compared with the conventional device. The compression resistance of the return spring 5 is set small. However, when the spring pressure of the return spring 5 is reduced, as described above, when the sliding member 2 comes into contact with another object,
The screw holding belt 5 is unexpectedly pushed into the casing 1 and
5 may cause a trouble such as a failure of the device or a defective driving. Therefore, in order to prevent such an unexpected pressing operation, the sliding member 2 is pressed when the screw driving device is not used. A sliding member stopping device 20 that can stop the operation is provided in the casing 1.

As shown in FIG. 4, the sliding member stopping device 20 has a cylindrical body 21 fixed to the outer wall of the casing 1 and protrudes into the casing 1 through the cylindrical body 21. The stopper pin 22 is provided with two annular grooves 23 and 24 on the outer peripheral surface of the stopper pin 22 at predetermined intervals in the axial direction. 25 are provided. On the other hand, the cylindrical body 21
Is mounted with a sphere 26 which engages with the annular groove 23 or 24 to lock and hold the stopper pin 22 at a predetermined position. The sphere 26 is urged toward the center of the stopper pin 22 by a pressing spring 27. I have. Then, as shown by the solid line in FIG. 4, the knob 25 is pulled out to pull out the stopper pin 22 to the outside,
At the release position where the sphere 26 is engaged with the annular groove 24, the tip of the stopper pin 22 retreats from inside the casing 1, and the sliding member 2 can be pushed into the casing 1. On the other hand, as shown in the imaginary line of FIG. 4 and FIG. 2, the knob 25 is pushed to cause the stopper pin 22 to protrude into the casing 1 and the sphere 26
Is in the operating position where the stopper pin 2 is engaged with the annular groove 23.
2 comes into contact with the rear end of the sliding member 2, and the sliding member 2 is brought into a stop state where it cannot be pushed into the casing 1. Therefore, even if the leading end of the sliding member 2 comes into contact with another part, it is not accidentally pushed.

Next, the screw holding belt feeding mechanism 30 will be described. As shown in FIGS. 5 and 6, the feed mechanism 30 is disposed in the lower portion of the sliding member 2 in parallel with the spring receiving cylinder 3 and has both ends rotatably pivotally supported. And a pin 3 protruding downward at an intermediate portion of the operating shaft 31.
2 is protruded, and a ratchet wheel 34 is rotatably fitted to the front end portion via a one-way clutch 33. When the operating shaft 31 rotates in the direction of arrow A in FIG. It only rotates together. As shown in FIG. 6, the ratchet wheel 34 has six feed claws 35 on its front surface.
Are projected radially at the same interval, and the two feed claws 35 located on the upper side are guided through a notch 36 provided at the center of the lower guide wall 10 forming the guide path 8. And engages with two notches 57, 57 on the lower side of the screw holding belt 55 which is fed along the guide passage 8. Further, six hemispherical engagement concave portions 37 are provided on the front surface of the ratchet wheel 34 so as to correspond to the feed claws 35. on the other hand,
As shown in FIG. 5, two receiving holes 3 corresponding to the engagement recesses 37 are formed in the front wall 2a of the sliding member 2 to which the ratchet wheel 34 is adjacent.
8, 38 are provided, and a pair of spheres 40, 40 are inserted into the two receiving holes 38, 38 via press springs 39, 39, respectively.
The spheres 40, 40 are accommodated in a posture biased to the four sides.
Are engaged with a pair of diametrically opposed engagement recesses 37, 37 to stop the positioning of the ratchet wheel 34.

On the other hand, in the bottom of the casing 1, as shown in FIG.
And an inclined guide slot 42 continuous with the guide groove 41.
And the casing 1 continues to the inclined guide slot 42.
Are provided in the longitudinal direction of the guide slot 43. When the sliding member 2 is pressed against the driven member (not shown) and is pressed into the casing 1 while compressing the return spring 5, the pin 32
2 along which the operating shaft 31 is moved obliquely.
In the direction indicated by the arrow A of FIG. This operating shaft 31
The hook wheel 34 is also rotated in the direction of arrow A in conjunction with the operation, the screw holding belt 55 is fed in the horizontal direction by one pitch by the feed hook 35, and the screw S held by the holding cylinder portion 56 is screwed by the driver. It is positioned at the driving position opposite to the tip of the bit 7. In this state, when the sliding member 2 is further pushed into the casing 1 while compressing the return spring 5, the pin 32 simply moves along the guide slot 43 and the operating shaft 3
1 does not rotate. On the other hand, this pushing operation causes the driver bit 7 to relatively advance, engage with the screw S positioned and held at the driving position, and drive the driving bit 7 into the driven member while rotating it. Has become. When the driving of the screw S is completed and the sliding member 2 is separated from the driven member, the sliding member 2 returns to the original posture shown in FIGS. While moving the inclined guide slot 42, the operating shaft 31 is rotated 60 degrees in the direction opposite to the arrow A in FIG. 6 to return to the original state. At this time, only the operation shaft 31 idles due to the action of the one-way clutch 33, and the ratchet wheel 34 is locked and held by the two spheres 40, 40 engaged with the two engagement recesses 37, 37 and stopped at the fixed position. The state that has been maintained.

FIGS. 1 and 2 show the actual screw driving operation.
Since the screw S positioned at the driving position protrudes from the distal end of the sliding member 2 as shown in FIG. 5, the screw protruding from the distal end of the sliding member 2 can be adjusted according to the length of the screw S. The length adjustment adapter 45 is attached to the sliding member 2.

As shown in FIG. 4, the screw length adjusting adapter 45 has a plate-like body 4 provided with a long hole 47 extending in the longitudinal direction.
6 has an L-shape with a forked contact piece 48 at the tip
A large number of semicircular locking projections 49 are provided in parallel along both side edges of the plate-like body 46. on the other hand,
On the upper surface of the sliding member 2, flat engagement grooves 50 for guiding and engaging the plate-like body movably in the longitudinal direction are provided, and engagement projections 49 are formed on opposed inner walls of the engagement grooves 50. Are provided in parallel with each other. Then, after the plate-like body 46 is engaged with the engagement groove 50 and the amount of protrusion of the contact piece 48 is adjusted according to the length of the screw S, the long hole 4
The adapter 45 is connected to the sliding member 2 with the wing bolt 52 inserted through
To be fixed. At this time, since the locking projections 49 on both sides of the plate-like body 46 are engaged with the concave portions 51 of the engagement grooves 50, the plate-like body 46 is firmly fixed without rattling. Further, since the screw length adjusting adapter 45 does not interfere with the screw holding belt 55 sent to the sliding member 2, the amount of protrusion can be easily and quickly adjusted.

[0019]

As described above, in the screw driving device according to the present invention, the casing is provided with the sliding member stopping means for stopping the sliding member from being pushed into the casing. By reducing the spring pressure of the return spring of the moving member and reducing the compression resistance when the sliding member is pushed into the casing, the sliding member can be used for a wide range of screws from short screws to long screws. Also,
If the sliding member stopping means is operated when the screw driving device is not used, there is no possibility that the sliding member may be accidentally pushed by contact with another object. In addition, by reducing the spring pressure of the return spring, the driving operation can be performed continuously without imposing a large burden on the operator in the case of a long screw.

According to the third aspect of the present invention,
Without greatly increasing the adjustment amount of the adjustment ring,
The entire length of the screw driving device including the adjusting ring
The sliding part with respect to the casing without increasing
Depth of material, that is, screw of the driver bit
The penetration depth can be adjusted over a wide range.

Further, according to the fourth aspect of the present invention,
Easy and quick adjustment of the screw length adjustment adapter
In addition, the adjusting adapter is attached to the sliding member.
It can be firmly fixed without any need.

[Brief description of the drawings]

FIG. 1 is a front view of a screw driving device according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a bottom view of the essential part.

FIG. 4 is an enlarged sectional view taken along line 4-4 in FIG.

FIG. 5 is a longitudinally enlarged front view of the sliding member.

FIG. 6 is a sectional view taken along line 6-6 in FIG. 5;

FIG. 7 is a perspective view of the screw length adjustment adapter.

FIG. 8 is a vertical sectional view of a main part showing a mounting state of a stop rod provided at a rear end of the sliding member.

[Description of Signs] 1 casing 2 sliding member 3 spring receiving cylinder 5 return spring 7 driver bit 8 guide passage 13 stopper rod 15 adjusting ring 20 sliding member stopping device 21 cylindrical body 22 stopper pin 30 screw holding belt feed mechanism 31 Actuating shaft 32 Pin 33 One-way crunch 34 Claw wheel 35 Feeding claw 37 Engagement concave part 40 Sphere 41 Guide groove 42 Inclined guide slot 43 Guide slot 45 Screw length adjustment adapter 48 Contact piece

Claims (4)

[Claims] 1. A cylindrical casing attached to a distal end portion of a driver tool, a sliding member slidably inserted into the casing via a return spring, and a screw holding member provided on the sliding member. A screw holding belt feeding mechanism for feeding the belt by one pitch of the screw holding interval, wherein the sliding member is pressed against the driven member, and the sliding member is pushed into the casing against the return spring. At this time, the screw holding belt feeding mechanism operates to feed the screw holding belt by one pitch, and then the screw held by the screw holding belt and sent to the driving position by the driver bit attached to the driver tool. Wherein the sliding member is stopped from being pushed into the casing by the casing. Screw setting tool, characterized in that the dynamic member stop means are provided. 2. The screw according to claim 1, wherein said sliding member stopping means is a pin which can protrude into said casing, and is provided so as to come into contact with a rear end of said sliding member when protruding. Driving device. 3. The screw holding belt is provided at a distal end portion of the sliding member and is configured to be fed along a guide passage extending transversely to the sliding member in the left-right direction. A screw length adjusting adapter for changing the amount of protrusion from the tip of the sliding member in accordance with the length of the screw held by the holding belt is attached so as to be displaceable in the longitudinal direction along the upper surface of the sliding member. The screw driving device according to claim 1 or 2, wherein the screw driving device is provided. 4. The push-in depth of the sliding member, that is, the screw-in depth of the driver bit, changes the position of an adjusting ring screwed to a cylindrical portion connected to a rear end of the casing, 4. The screw driving device according to claim 1, wherein the screw driving device is configured to be adjustable by using the stopper rod attached to the rear end of the member together with the length of the stopper rod.