JPS5817735Y2 - screwdriver bit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bit for a screwdriver, and more particularly, to a bit to be attached to the tip of a screwdriver as a mechanical tool equipped with an automatic screw supply device.

In general, screwdriver bits, such as so-called electric screwdrivers and air screwdrivers, are used by fixing the base end to the chuck of the screwdriver, but conventional bits of this type have a continuous screwdriver of the required length. It was formed.

Therefore, if the tip of a bit wears or breaks, the entire bit must be discarded and replaced with a new bit, even though the rest of the bit is still solid; this is not economically viable. This is extremely disadvantageous.

The purpose of this invention is to provide a new screwdriver bit that can solve the above-mentioned problems.
The configuration for achieving this purpose will be described below based on the illustrated embodiment.

As shown in FIGS. 1 and 2, the present invention comprises a ring-shaped bit 1 having a pointed end 1a for fitting into the head groove of a screw such as a screw, and a pulley-combining connector 3 having a belt groove 2. It is composed by

The bit 1 is composed of a proximal member 4 and a distal end member 5.

At one end of the members 4 and 5, there is a recessed connecting portion 4 that fits into each other.
a, 5a, and connecting portions 4a, 5a.
a has protrusions 4b and 5b that protrude in the radial direction, and a groove 4c that is recessed in the radial direction and into which the other protrusion 4b and 5b are respectively fitted.
, 5c, and a screw hole 6 for screwing a fixing screw 9 in the radial direction is provided in the vicinity of the connecting portion 4a of the member 4.

A bit hole 7 into which the bit 1 is inserted is provided in the axial center of the pulley-combined connector 3, and a fixing screw 9 is provided on one side of the belt groove 2 in an axial direction that is long and communicates with the bit hole 7. A screw guide hole 8 is provided for insertion.

Bit 1 in the present invention having the above-mentioned configuration is
As shown in FIG. 2, connecting portions 4a and 5 of members 4 and 5
a are fitted into each other, and the protrusions 4b and 5b are fitted into the other grooves 4c and 5c to connect them, and this connecting part is inserted into the bit hole 7 of the pulley-combined connector 3. However, by screwing the fixing screw 9 into the screw hole 6 from the screw guide hole 8 and fitting the connector 3, the above-mentioned fitted and connected state of the members 4 and 5 is fixed.

In addition, in the present invention, a screw hole 6 may be provided in the member 5 so that the screw 9 can be screwed into the member 5. The bit 1 in the present invention connected in this manner may be, for example, as shown in FIG. This screwdriver 11 is attached to the base end of a screwdriver 11 equipped with an automatic screw supply device 10.

As shown in FIG. 3, the device 10 includes a transmission shaft 12 as a mechanism for transmitting the rotational drive of the bit 1 by the driver 11.
, pulleys 13.14a, 14b, 15, and a heald 16.17, and when the belt 16 is hung around the pulley 3 and the bit 1 is driven to rotate by the driver 11, this rotation is transmitted to the transmission mechanism, which This drives a screw supply mechanism (not shown) in the device 10 to feed the screws 18 to the supply port 19.

Then, when the screws 18 are sent to the supply port 19, the driver 11 is lowered and the pointed end 1a of the bit J is fitted into the head groove of the screws 18, so that the screws 18 are screwed into the desired object. That will happen.

As described above, according to the present invention, the bit 1 is connected to the proximal member 4.
Since the bit 1 is divided into a tip member 5 and a tip member 5, and these are connected, if the member 5 becomes worn or broken, or if the member 4 breaks, the bit 1 can be discarded without discarding the entire bit 1. Only part 4 or 5 can be replaced by another equivalent new part, which is economical and extremely convenient.

Moreover, both members 4 and 5 constituting the bit 1 are securely connected in a connected state by the connector 3 and fixing screw 9 in addition to the fitted state of the mutually recessed connecting portions 4a and 5a. There is no possibility that the member 5 separates from the member 4 during use.

In addition, since the connector 3 also serves as a pulley, for example, in a screwdriver 11 equipped with an automatic screw supply device 10 as described above, a belt 16 for transmitting rotational drive of the bit 10 to the device 10 can be hung. It is something that can be done.

[Brief explanation of the drawing]

The drawings show an embodiment of the bit of the present invention, in which Fig. 1 is an exploded perspective view of the bit, Fig. 2 is a partially cutaway side view of the connected state of the bit, and Fig. 3 shows screws. FIG. 2 is a side view of a screwdriver equipped with an automatic feeding device with a bit attached thereto. DESCRIPTION OF SYMBOLS 1...Bit, 3...Pulley combination connector, 4...Proximal end member, 5...Tip member, 4 a, 5 a... ... Phase-notch connection part, 4
b, 5 b...protrusion, 4c, 5c...
・Concave groove, 6...screw hole, 7...bit hole, 8...screw guide groove, 9...screw,
10... Automatic supply device for screws, 11...
・Screwdriver

Claims (1)

[Scope of utility model registration request] The bit is configured to be divided into a proximal end member and a distal end member, and the reciprocal connecting portions provided at the ends of the two members are fitted and connected to each other, and a pulley-cum-connector is fitted on the outside of the connecting portion. A screwdriver bit characterized in that the fitted and connected state of both the members is fixed by this.