JPH09290373A - Screwdriver and driver shaft - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a screwdriver in such a way that work of fastening or loosening a screw, a bolt, a nut, or the like can be performed with one hand without changing the hand gripping a grip body by simple internal mechanism. SOLUTION: An elastic member 4, an intermediate member 3 and a rear part of a driver shaft 2 are inserted in this order into a hollow grip body 1 from its opening end, and the driver shaft 2 is movably locked to the grip body 1 by a slip-off stopper pin 5. An engaging head 11 formed at the rear part of the driver shaft 2 is separated from and engaged with a locking part 12, formed at the specified inner peripheral surface of a hollow part 6 of the grip body, by the longitudinal movement of the driver shaft 2 so as to be able to rotate the driver shaft 2 and the grip body 1 separately or integrally.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driver used for tightening and loosening various screws, bolts and nuts used in all technical fields, and a driver shaft for this driver. .

[0002]

2. Description of the Related Art Generally, various industrial machines, furniture, daily necessities, etc.
Various screws, bolts, nuts, etc. are used to stop members in all technical fields. Various drivers have been developed and used as tools for turning these screws and the like.

As a general driver, a driver shaft having a grip of various shapes formed of synthetic resin or wood fixedly attached to the rear part of the driver shaft is mainstream, and an internal gear is operated by operating a lever provided on the grip. There is a driver that controls the mechanism so that the driver shaft can be rotated integrally with the grip only in a desired rotation direction. Further, as disclosed in Japanese Utility Model Laid-Open No. 22874/1990, a driver has been developed in which the rotation speed of the driver shaft can be changed by switching the meshing of the internally incorporated gear mechanism and the driver shaft. .

[0004]

However, in the conventional driver having the driver shaft fixed to the above-mentioned grip, the grip is gripped when the driver is screwed or loosened, for example. In order to turn the driver in the same direction when turning the driver by a certain rotation angle, support the driver with the other hand and change the hand holding the grip in the same direction. It was difficult to keep turning the driver.

For this reason, the work of screwing and loosening takes a lot of work, and the work time is long and the work efficiency is a problem in the work of screwing a large number of screws. Further, since both hands have to be used, it is sometimes difficult to change the grip when screwing work in a narrow place, and workability is significantly impaired. Furthermore, each time you change the grip, you have to support the driver with your other hand once, so if the screw etc. is not yet stopped, drop the screw or slide your hand when you change the driver. There were times when I dropped it. In addition, when the grip is changed as described above, the engagement between the tip of the driver and the engagement groove of the screw head is not always sufficient.If the driver is rotated in this state, the engagement groove of the screw head or the tip of the driver There was also the problem of damaging the.

Further, in the driver in which the driver shaft is used by rotating the driver shaft integrally with the grip only by rotating the lever, the internal gear mechanism is complicated and the manufacturing cost is high. In addition, when using it, it was necessary to grasp the grip with one hand and operate the lever with the other hand, and since both hands were used, it was not suitable for use in narrow places. In addition, there is a problem that the weight becomes heavy.

Further, the driver described in Japanese Utility Model Laid-Open No. 3-22874 has a problem that the internal structure is complicated like the driver, the manufacturing cost is high, and the weight is heavy.

The present invention was developed in order to solve the above problems, and its purpose is to:
An object of the present invention is to provide a driver and a driver shaft which can be simply configured to perform tightening or loosening work of screws, bolts, nuts, etc. with one hand without holding the hand holding the grip body.

[0009]

Accordingly, the present invention has the following configuration in order to effectively achieve the above object. That is, the driver of the present invention according to claim 1 is
A hollow grip body having one end opened and the other end closed, and a driver shaft having an engaging head portion formed at a rear end and an engaging groove having a predetermined width formed in an outer peripheral portion near the engaging head portion. When,
An intermediate member that abuts the engaging head portion of the driver shaft, a recoverable elastic member whose one end abuts on the intermediate member, and a retaining pin that locks the driver shaft. A locking portion is formed on the inner peripheral surface so that the engaging head of the driver shaft can be detachably engaged, and a through hole communicating with the inside of the grip body is formed at a side position near the tip of the grip body. , The elastic member and the intermediate member are sequentially inserted from the opening end of the grip body, the driver shaft is inserted from the engaging head, and the retaining pin is inserted into the engaging groove of the driver shaft from the through hole of the grip body. Rotate the driver shaft by inserting it so that the tip engages.
It is locked to the grip body so that it can move back and forth, and this driver shaft is pushed outward through the intermediate member by the elastic force of the elastic member so that the engagement head of the driver shaft and the grip body engage. The engagement with the stopper is released so that the driver shaft can be rotated separately from the grip body, and the tip of the driver shaft is pressed to force the driver shaft to elastically urge the elastic member. When moved into the grip body against the grip, the engaging head part of the driver shaft engages with the locking part of the grip body so that the driver shaft can be rotated integrally with the grip body. It is configured.

According to a second aspect of the present invention, a driver has a grip body, a grip cover, an engaging head portion formed at a rear end thereof, and an outer peripheral portion near the engaging head portion with a predetermined width. A driver shaft formed with a groove, an intermediate member that abuts on an engaging head portion of the driver shaft, a recoverable elastic member whose one end abuts on the intermediate member, and the other end of the elastic member. It consists of a stop member that contacts and a retaining pin that locks the driver shaft.The grip body is formed with an insertion hole for the driver shaft from the tip to an appropriate position inside, and is designed to communicate with this insertion hole. A cylindrical hole having a smaller diameter than the insertion hole is formed through to the other end of the grip body, and the engagement head of the driver shaft can be detachably engaged with the inner peripheral portion of the rear end of the insertion hole. Grip body with locking part The stopper member can be inserted and fixed in the tubular hole portion on the rear end side, and a through hole is formed so as to communicate with the insertion hole portion from a predetermined side position of the grip body, The intermediate member and the elastic member are inserted into the cylindrical hole portion from the rear end in this order, and the rear end portion of the cylindrical hole portion is sealed with a stopper member, and this grip body is covered with a grip cover, and Insert the driver shaft into the insertion hole from the engaging head, and insert the retaining pin from the through hole of the grip body so that the tip engages with the engaging groove of the driver shaft to rotate the driver shaft. It is locked to the grip body so that it can move back and forth, and this driver shaft is pushed outward through the intermediate member by the elastic force of the elastic member so that the engagement head of the driver shaft and the grip body engage. When the engagement with the stopper is released, With Iba shaft is made to be freely separately rotate the grip body, when moving into the grip body driver shaft by pressing the tip of the screwdriver shaft against the resilient urging of said resilient member,
The head portion of the driver shaft is engaged with the locking portion of the grip body so that the driver shaft can be rotated integrally with the grip body.

According to a third aspect of the present invention, in the driver of the first or second aspect, a rotation assisting member is provided on the outer peripheral portion of the driver shaft near the grip body.

Further, in the driver shaft according to the present invention as set forth in claim 4, an engaging portion for engaging the head engaging groove of the set screw, the bolt head, or the nut is formed at the tip of the shaft or is detachable. In addition to being provided, an engaging head portion is formed at the rear end of the shaft, and an engaging groove having a predetermined width is formed in the outer peripheral portion near the engaging head portion.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. The driver of the present invention shown in FIGS. 1 and 2 (see FIGS. 10 and 11) is a hollow grip body 1
The driver shaft 2, the intermediate member 3, the restorable elastic member 4, and the retaining pin 5 are included.

More specifically, the grip body 1 has a cylindrical shape whose one end is opened and the other end is closed by a member such as synthetic resin or wood, and the hollow portion 6 of the grip body 1 is formed. An insertion hole portion 8 for a driver shaft is formed in one end from the opened one end 7 to an intermediate position inside. Further, a cylindrical hole portion 10 having a smaller diameter than the insertion hole portion 8 is formed so as to communicate with the insertion hole portion 8 up to the vicinity of the other end 9 of the grip body 1. An engaging head portion 11 of the driver shaft 2, which will be described later, is provided on the inner peripheral portion 8a of the rear end of the insertion hole portion 8.
A hexagonal locking portion 12 that is detachably engaged with is formed. Further, a through hole 13 that communicates with the insertion hole portion 8 at right angles is formed from a side position of the grip body 1 located approximately in the middle of the insertion hole portion 8.

The locking portion 12 is not limited to a hexagonal shape, but may have any polygonal shape as long as it is a triangle or more. In this case, the shape of the engaging head portion 11 of the driver shaft 2 is also made the same as the shape of the engaging portion 12 in accordance with the polygonal shape of the engaging portion 12. Of course, when the engaging head portion 11 of the driver shaft 2 is formed in a shape other than a polygonal shape, the shape of the engaging portion 12 may be changed in design so that the engaging head portion 11 can engage with the shape. Further, the insertion hole portion 8 is not limited to the intermediate position in the longitudinal direction of the grip body 1, but may be near the one end 7 or the other end 9 when the grip body 1 is longer. Further, the overall size and shape of the grip body 1 is not limited to the illustrated shape, and may be any shape.

However, the driver shaft 2 is a metal shaft member having a predetermined length, and the tip portion 2a is engaged with the engagement piece portion 14 so as to engage with the + groove of the plus screw head (not shown). Are formed. The engaging piece portion 14 can be engaged with the screw groove of the slotted screw, or the tip portion 2
An engaging part (not shown) that engages various nuts and bolt heads may be detachably attached to a.
Further, a hexagonal engagement head portion 11 is formed on the rear end portion 2b of the driver shaft 2, and an outer peripheral portion near the engagement head portion 11 is provided with respect to engagement of a retaining pin 5 described later. An engagement groove 15 having a predetermined width is formed so that the driver shaft 2 can be moved in the front-rear direction to some extent and can be rotated.

The intermediate member 3 is a sphere formed of a metal member, is provided at the boundary between the insertion hole 8 and the cylindrical hole 10 of the grip body 1, and is provided at the rear end of the driver shaft 2. By interposing between the portion 2b and the tip of the elastic member 4, the pressing force of the driver shaft 2 is transmitted to the elastic member 4,
The elastic force of the elastic member 4 is transmitted to the driver shaft 2.
The intermediate member 3 may be made of a hard synthetic resin material, ceramic, or the like. Further, if the function as the intermediate member 3 is exerted, the design may be changed to a shape other than a sphere.

The resilient elastic member 4 is a cylindrical coil spring 4a which can be inserted into the cylindrical hole 10 of the grip body 1. Of course, the elastic member 4 is not limited to the cylindrical coil spring 4a, and may be an elastic member formed of any member as long as it is a recoverable member.

The retaining pin 5 is a hard one (for example, a metal shaft) which can be inserted into and fitted into the through hole 13 of the grip body 1, and the tip portion 5a is inserted into the insertion hole portion 8. The length is such that it can project and engage with the engagement groove 15 of the driver shaft 2.

In the driver of the present invention comprising the above-mentioned components, the cylindrical coil spring 4a and the intermediate member 3 are sequentially inserted into the cylindrical hole portion 10 of the grip body 1 and the driver shaft 2 is attached to the rear end portion. 2b is inserted into the insertion hole portion 8, and further, the retaining pin 5 is inserted through the through hole 13 of the grip body 1 so as to be engaged with the engagement groove 15 of the driver shaft 2.

In the driver as described above, the driver shaft 2 is normally pressed outward from the grip body 1 via the intermediate member 3 by the elastic force of the cylindrical coil spring 4a. . Tip 5a of retaining pin 5
Is positioned in the engagement groove 15 near the rear end portion 2b of the driver shaft 2 to lock the driver shaft 2 and prevent the driver shaft 2 from coming off the grip body 1.

In this state, the engaging head portion 11 of the rear end portion 2b of the driver shaft 2 has an engaging relationship with the engaging portion 12 formed on the inner periphery of the rear end portion of the insertion hole portion 8 of the grip body 1. It is in the released state (see Fig. 1) and the driver shaft 2
Can be freely rotated separately from the grip body 1.

When tightening a screw using the above driver, for example, the grip body 1 is grasped with one hand, and the tip end portion 2a of the driver shaft 2 is engaged with an engagement groove (not shown) of the screw to fix the grip body 1. Push in the direction of the driver shaft 2.
As a result, the driver shaft 2 is attached to the cylindrical coil spring 4a.
The cylindrical coil spring 4 together with the intermediate member 3 against the elastic urging force of the
By moving to the side a, the engaging head portion 11 of the driver shaft 2 engages with the locking portion 12 in the grip body 1, and the driver shaft 2 and the grip body 1 rotate integrally.

After this state, the grip body 1
By rotating, the rotational force is transmitted to a screw (not shown) via the driver shaft 2, and the screw can be rotated to a position where the hand holding the grip body 1 can rotate. To further tighten the screw by releasing the pressing of the grip body 1 toward the driver shaft 2 without releasing the hand from the grip body 1, the grip body 1 is pulled forward by the elastic force of the cylindrical coil spring 4. Move to. As a result, the engagement relationship between the engaging head portion 11 of the driver shaft 2 and the locking portion 12 in the grip body 1 (see FIG. 2) is released, and the driver shaft 2 and the grip body 1 can be freely rotated separately. You will be able to.

In addition to the driver shaft 2 engaged with the screw in the above state, the grip body 1 is rotated in the direction opposite to the screw tightening direction, and the hand holding the grip body 1 tightens the screw. Return to the position where it can be rotated in the direction (original position). Then, the grip body 1 is pushed again toward the driver shaft 2 to engage the engaging head portion 11 of the driver shaft 2 and the grip body 1 with each other.
The driver shaft 2 integrated with the grip body 1 is engaged with the inner locking portion 12, and the driver shaft 2 is turned in the screw tightening direction to tighten the screw. The above operation is repeated several times to reattach the screw at a predetermined position. By doing so, the screw tightening work can be performed without releasing the hand holding the grip body 1. Of course, the loosening operation of the screw can be performed quickly by reversing the rotation direction and performing the same operation.

In the above driver, as shown in FIG.
As shown in FIGS. 2 and 10, a cylindrical rotation assisting member 16 may be fitted to the outer peripheral portion of the driver shaft 2 near the grip body 1. By providing the rotation assisting member 16 on the driver shaft 2, when the screw is temporarily stopped, the rotation assisting member 16 can be easily rotated by holding the grip body 1 and turning it with a finger. It can be turned into. As a result, the screw engaged with the tip portion 2a of the driver shaft 2 can be easily temporarily fixed without turning the grip body 1. Further, since the driver shaft 2 is rotated while holding the rotation assisting member 16, the screw groove (not shown) and the tip portion 2a of the driver shaft 2 can be securely engaged, and the screw is stopped during temporary fixing. It is possible to prevent falling from the place as much as possible.

In the above driver, even if the grip body 1 in which the diameter of the insertion hole 8 formed in the hollow portion 6 and the diameter of the cylindrical hole 10 are the same, the same operation and effect as above can be obtained. Can be obtained.

3 to 9 (see FIGS. 10 and 11) show another driver according to the present invention. It should be noted that parts having the same functions as those of the driver are given the same reference numerals.
This driver is composed of a hollow grip body 1 penetrating therethrough, a driver shaft 2, an intermediate member 3, a restorable elastic member 4, a retaining pin 5, a retaining bolt 17, and a grip cover 18. It is configured. In addition, the driver shaft 2, the resilient member 4 that can be restored, and the retaining pin 5
Has the same structure as the driver described above,
The same reference numerals are given to the drawings and the description will be omitted.

More specifically, the driver will be described in more detail. The grip body 1 has a cylindrical shape formed of a member such as synthetic resin or wood, and the hollow portion 6 of the grip body 1 has one end. 7 to an intermediate position in the inside, a driver shaft insertion hole portion 8 is formed, and a tubular shape having a smaller diameter than the insertion hole portion 8 to the other end 9 of the grip body 1 so as to communicate with the insertion hole portion 8. The hole 10 is formed. Tip portion 10a of the cylindrical hole portion 10 on the insertion hole portion 8 side
Has an annular convex portion 10b with a further reduced diameter. The rear end portion 10b side of the cylindrical hole portion 10 is threaded, and the set bolt 17 is attached to the rear end portion 10b of the cylindrical hole portion 10.
The cylindrical hole 10 is sealed by being screwed onto the b.

Therefore, the inner peripheral portion 8 at the rear end of the insertion hole 8 is formed.
A hexagonal engaging portion 12 that is detachably engaged with the engaging head portion 11 of the driver shaft 2 is formed in a. Incidentally, the shape of the locking portion 12 may be variously changed in design as described above with respect to the driver. A through hole 13 is formed at a side position of the grip body 1 located approximately in the middle of the insertion hole 8 so as to communicate with the insertion hole 8 at right angles.

The intermediate member 3 is a short shaft body having a T-shaped vertical cross section formed of a metal member, and is provided in the grip body 1 with the portion 3a having a small diameter as the insertion hole 8 side. The operation is similar to that of the driver.

The grip cover 18 is a bottomed cylindrical body formed of synthetic resin and having one end opened. The grip cover 18 is fitted to the grip body 1 and together with the set bolt 17, the rear end 9 and the outer peripheral portion of the grip body 1. It is made possible to coat. The driver shaft 2 is attached to the rotation assisting member 1
6 is preferably provided. Of course, the driver shaft 2 without the rotation assisting member 16 may be used.

In the driver of the present invention comprising the above-mentioned components, the intermediate member 3 and the cylindrical coil spring 4a are inserted in this order from the rear end into the cylindrical hole portion 10 of the grip body 1 and the fixing bolt 17 is used. The cylindrical hole 10 of the grip body 1 is sealed.

Further, the driver shaft 2 is inserted into the insertion hole 8 from the rear end portion 2b, and the retaining pin 5 is inserted from the through hole 13 of the grip body 1 so as to engage with the engaging groove 15 of the driver shaft 2. Put on the grip body 1 and finally the grip cover 1
Cover with 8. The operation of the driver when used is almost the same as that of the driver described above, and the description thereof is omitted.

[0035]

As is apparent from the above description, in the driver of the present invention according to claim 1, the driver shaft can be rotated separately from the grip body or integrally with the grip body by a simple internal structure. It can be rotated. Therefore, even when tightening or loosening screws, etc., without changing the grip body,
While holding the grip body, you can separate the driver shaft and the grip body or repeat the operation of engaging them integrally to tighten or loosen the screws etc.
It is very convenient and can greatly improve the workability of screwing and loosening work. Further, since the inner hollow portion of the grip body only needs to be machined with a hole having the same diameter, it can be easily machined and the manufacturing cost can be reduced.

Also, with the driver of the present invention as defined in claim 2, the same effect as the above driver can be obtained, and the tightening and loosening work of the screws and the like can be performed very easily.

Further, in the driver of the present invention as defined in claim 3, since the rotation assisting member is provided on the outer peripheral portion of the driver shaft, the rotation assisting member is used when temporarily fixing the screw or the like before the final tightening. By turning, normally, only the driver shaft in the state where the connection with the grip body is released can be turned to easily temporarily fix the screw or the like. Further, not the grip body but the screwdriver shaft close to the screw or the like to be temporarily fixed is rotated, so that it is possible to prevent the screw or the like from being dropped at the time of temporary fixing. Further, by rotating the rotation assisting member having a diameter larger than the diameter of the driver shaft, the screw or the like can be strongly screwed in with a small force.

Further, in the driver shaft according to the present invention as defined in claim 4, the driver shaft is combined with an engaging mechanism in another grip main body by a simple processing configuration to attach the driver shaft to the driver shaft. Can be moved back and forth to rotate integrally with the grip body, or can be rotated separately from the grip body.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a driver of the present invention.

FIG. 2 is a vertical sectional view of the driver of the present invention in use.

FIG. 3 is a vertical sectional view of another driver of the present invention.

FIG. 4 is a longitudinal sectional view of another driver of the present invention in use.

FIG. 5 is an exploded perspective view showing a partial cross section of another driver of the present invention.

FIG. 6 is a plan view of a driver shaft according to the present invention.

FIG. 7 is a front view of the driver shaft of the present invention.

FIG. 8 is a side view of the driver shaft of the present invention.

FIG. 9 is a bottom view of the driver shaft of the present invention.

FIG. 10 is a perspective view of a driver of the present invention.

FIG. 11 is a perspective view of another driver of the present invention.

[Explanation of symbols]

 1 Grip Main Body 2 Driver Shaft 3 Intermediate Member 4 Elastic Member 5 Retaining Pin 6 Hollow Part 8 Insertion Hole 10 Cylindrical Hole 11 Engaging Head 12 Locking Part 13 Through Hole 15 Engagement Groove 16 Rotation Auxiliary Member 17 Fixing bolt 18 Grip cover

Claims (4)

[Claims] 1. A hollow grip body having one end opened and the other end closed, an engagement head portion formed at a rear end, and an engagement groove having a predetermined width formed in an outer peripheral portion near the engagement head portion. A driver shaft, an intermediate member that abuts the engaging head of the driver shaft, a resilient elastic member whose one end abuts on the intermediate member, and a retaining pin that locks the driver shaft. , An appropriate inner peripheral surface inside the grip body is formed with a locking portion to which the engaging head portion of the driver shaft can be detachably engaged, and further inside the grip body at a side position near the tip of the grip body. A through hole communicating with each other is formed, and the elastic member and the intermediate member are sequentially inserted from the opening end of the grip body, the driver shaft is inserted from the engaging head, and the retaining pin is further inserted from the through hole of the grip body. Insert the driver shaft into the engaging groove It is inserted so that the end engages, and the driver shaft is locked to the grip body so that it can be rotated and moved back and forth, and this driver shaft is moved outside through the intermediate member by the elastic force of the elastic member. The driver shaft is pushed toward the end to release the engagement relationship between the driver shaft engaging head and the grip body locking part, so that the driver shaft can be rotated separately from the grip body, and the tip of the driver shaft can be rotated. When the driver shaft is moved into the grip body against the elastic force of the elastic member by pressing, the engaging head of the driver shaft engages with the locking part of the grip body, A driver characterized in that the shaft can be rotated integrally with the grip body. 2. A grip body, a grip cover, a driver shaft having an engaging head portion formed at a rear end thereof and an engaging groove having a predetermined width formed in an outer peripheral portion near the engaging head portion, An intermediate member that abuts the engaging head portion of the driver shaft, a resilient elastic member whose one end abuts on the intermediate member, a stopper member abutting the other end of the elastic member, and the driver shaft that is locked The grip body is formed with an insertion hole for the driver shaft from the tip to an appropriate position inside, and the insertion hole extends to the other end of the grip body so as to communicate with the insertion hole. A cylindrical hole having a smaller diameter is formed so as to penetrate therethrough, and further, an inner peripheral portion of the insertion hole is provided with a locking portion capable of detachably engaging the engaging head portion of the driver shaft, and The above-mentioned stopper is inserted and fixed in the cylindrical hole on the rear end side. A through hole is formed so as to communicate with the insertion hole portion from a predetermined side position of the grip body, and an intermediate member and an elastic member are provided in order from the rear end of the grip body into the cylindrical hole portion. While inserting and sealing the rear end of the tubular hole with a stopper, this grip body is covered with a grip cover, and the driver shaft is inserted into the insertion hole of the grip body from the engaging head, The retaining pin is inserted from the through hole of the grip body so that the tip engages with the engaging groove of the driver shaft, and the driver shaft is locked to the grip body so that it can be rotated and moved back and forth. Is pushed outward by the elastic force of the elastic member via the intermediate member, and the engagement relationship between the engaging head portion of the driver shaft and the engaging portion of the grip body is released, and the driver shaft grips. Can be rotated separately from the main body In addition, when the driver shaft is pushed into the grip body against the elastic force of the elastic member by pressing the tip of the driver shaft, the engaging head of the driver shaft engages with the engaging part of the grip body. A driver characterized in that the driver shaft can be integrally rotated with the grip body by engaging with the stopper. 3. The driver according to claim 1, wherein a rotation assisting member is provided on the outer peripheral portion of the driver shaft near the grip body. 4. A head engaging groove of a set screw, a bolt head, or an engaging portion for engaging a nut is formed at the tip of a shaft,
Alternatively, it is detachably provided, an engaging head portion is formed at a rear end of the shaft, and an engaging groove having a predetermined width is formed at an outer peripheral portion near the engaging head portion. Driver axis.