JP2607547Y2 - Electric screwdriver with automatic screw supply - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE devised, the electric screwdriver bi
In Tsu DOO tip portion, adsorbing it automatically supplying the screws holding
The present invention relates to an electric screwdriver provided with a screw automatic supply unit provided with a mechanism for holding the screw .

[0002]

Oite BACKGROUND ART Conventionally, as this type of electric screwdriver, for example, a fluid chamber provided in the cylindrical case provided at the end of the grip portion of the electric driver, to supply fluid to the fluid chamber Accordingly, a part of the screw supply holder is drawn into the fluid chamber, or by the fluid is discharged, an electric screwdriver that screw supply holding member is configured to advance and retreat move is known (JP-a 3-8
6481).

[0003] According to the configuration of the electric driver, screws that will be attracted and held to the screw feed holding body is drawn to the distal end of the suction tube by retraction move the screw feed holder, precisely a screw to the bit tip Can be held by suction. However, forward and backward move of the screw feed holding body, because it is determined by the length of the cylindrical case, the moving distance is Ru are more constrained to the length of the cylindrical case. Therefore, the position of the length and the bit tip of the suction tube can not protrude the distance from the electric screwdriver body <br/> not long.

[0004] Therefore , for example, when a screw-fastened portion is present at the bottom of a box-shaped article, the entire electric screwdriver body is stored.
If a space that can be accommodated is not secured in the article ,
This type of electric screwdriver cannot be applied .

[0005]

The present invention To solve the above problems, it is an object of the present invention
In order to overcome the various problems described above, instead of the fluid chamber of the known <br/>, for extending the length of the suction tube, the electric
By installing a cylinder outside the driver body,
Te, only the length of <br/> adsorption tube can be smoothly and properly extended without affecting the length of the electric screwdriver body
To provide an electric screwdriver with an automatic screw feeder
It is in .

[0006]

In order to achieve the above object, an electric screwdriver having an automatic screw feeder according to the present invention includes a screwdriver provided on a rotary output shaft (12) derived from an electric screwdriver body (10). A bit (14) is detachably mounted, and a suction pipe (16) slightly projecting from the tip of the bit and surrounding the outer periphery thereof is elastically attached in the axial direction, and the bit and the suction are attached to the outer circumference of the suction pipe. At the same time, a screw supply holder (20) for moving the screw back and forth along the pipe and guiding the screw to the tip of the bit and the suction pipe and temporarily holding the screw is attached. A screw automatic supply unit configured to connect and connect the ventilation pipe (18) of the above, and to suck and hold the screw (36) automatically supplied to the tip of the bit by sucking the fluid in the suction pipe. With In dynamic drivers, as well as arranged outside the cylinder (22) of the electric driver body (10), attached to the cylinder, the inclined state with respect to the support shaft (24) fixed to the grip portion distal end side of the electric gun body, the screw feed carrier an end of the operating shaft of the cylinder (26) via a universal joint (28)
Connect (20) to the inclined state, and fix the other end to the inclined state.
In addition to being connected to a fixed cylinder (22), a second ventilation pipe (30) and a third ventilation pipe (32) are provided before and after the cylinder, and fluid is supplied to the ventilation pipes (30, 32). When the operation shaft (26) of the cylinder (22) is moved forward and backward by alternately supplying the cylinder, the cylinder is configured to be swingable with the support shaft (24) as a fulcrum, and the screw supply holder (20) Is moved forward and backward along the suction pipe (16) to suck and hold a screw automatically supplied to the tip of the driver bit (14).

[0007]

According to the electric screwdriver provided with the automatic screw supply section according to the present invention, the screw supply holder is moved forward and backward by the cylinder provided in an inclined state outside the electric screwdriver main body, so that the electric screwdriver is provided. There is no need to provide a cylindrical case at the end of the gripping part for moving the screw supply holder forward and backward, and it is possible to simply configure so that the length of the suction tube can be extended without being limited by the dimensions of this case. Therefore, it is possible to provide an electric screwdriver having an automatic screw supply unit suitable for work in a narrow place.

[0008]

Next, an automatic screw feeder according to the present invention is provided.
Per an embodiment of the electric screwdriver will be described in detail with reference to the accompanying drawings. 1 and 2, the present invention
FIG. 1 shows an embodiment of an electric screwdriver provided with such an automatic screw supply unit , and FIG. 1 is a cross-sectional side view of a main part showing a state in which a screw supply holding body has moved to a tip end of a suction tube .
Ri, Figure 2 is a fragmentary cross-sectional side view showing a state where the screw feed holder is fully retracted.

However, in FIGS. 1 and 2, reference numeral 10 indicates an electric screwdriver main body. electric screwdriver
The body 10, the electric motor (not shown) is built, this
Rotational driving force than the electric motor Ru is output, as transmitted to the driver bit 14 via the rotary output shaft 12
Be composed .

A cylinder 22 is tilted at the tip of the electric screwdriver body 10 so as to be swingable by a support shaft 24.
It is installed in an inclined state . The rear end and the front end of the cylinder 22 have a second ventilation pipe 30 and a third
By supplying a fluid from the ventilation pipes 30 and 32, a piston (not shown) provided in the cylinder 22 moves forward and backward. Thereby, the operating shaft 26 of the cylinder 22 connected to the piston is configured to move forward and backward.

Reference numeral 28 denotes a universal joint through which one end of the operating shaft 26 and the screw supply holder 20 are inclined.
The configuration is simple because it is connected to the state . Therefore, by alternately supplying the fluid into the cylinder 22 from the ventilation pipes 30 and 32, when the operating shaft 26 of the cylinder 22 is moved forward and backward, the cylinder 22 can swing about the support shaft 24 as a fulcrum. The screw supply holder 20 can be configured to smoothly move forward and backward.

Furthermore, reference numeral 18 indicates a first vent pipe, by sucking the fluid from the vent pipe 18 to discharge the fluid in the suction tube 16. Therefore, said from the tip of the suction pipe 16, since the outside air is sucked, the suction tube
The tip of the screwdriver bit 14 located within 16, the head of the I <br/> Ji 36 is held by suction.

Next, an automatic screw feeder according to the present invention is provided.
The operation of the electric screwdriver will be described.

First, an automatic screw feeder according to the present invention is provided.
E was electric screwdriver, as shown in FIG. 2, in a state where the screw feed carrier 20 is moved to the electric driver body 10 side (driving standby state), it is more grip on the operator. Therefore, in order to move the screw supply holder 20 ,
Cylinder 2 provided outside electric driver body 10
2, between the grip portion of the electric driver, is provided with sufficient space, never as cylinder 22 hits the operator's hand can grip without hindrance electric screwdriver.

Thereafter , a compressor (not shown) provided outside through a ventilation pipe 30 provided at the rear end of the cylinder 22.
By supplying fluid by not), the screw feed carrier 20, as shown in FIG. 1, is moved toward the distal end portion of the suction tube 16. In this state, the screw 36 from the screw supplying pipe 34
There is provided, the supplied screws 36 screw guide passage 3
Through 8, the closing pawl 40 shown in FIG. 3, is attracted and held to the tip portion of the screw feed carrier 20.

Thereafter, the outside connected to the ventilation pipe 32 is
The fluid is supplied into the cylinder 22 by the compressor, and the screw supply holder 20 is moved backward. Therefore <br/> Te, the leading end portion of the suction tube 16 is pushed down the swing claw 42, close to the screw 36 which is held in the opening and closing jaw 40. During this time, the fluid in the suction tube 16 is supplied to a suction device (
), The outside air is sucked from the tip of the suction tube 16 and a force for suctioning the screw 36 is applied. In this way, the screw supply holding member 20 is moved backward, when the screw 36 to the distal end of the suction tube 16 approaches, the screw 36 is attracted to and held <br/> the tip of the suction tube 16.

[0017] Then, while the suction tube 16 pushes open the closing pawl 40 projects from the screw supply holding member 20, the screw feed carrier 20, the screw tightening work with retracted to the position shown in FIG. 2
A standby state.

In this standby state, the operator presses the screw 36 sucked and held at the tip of the suction tube 16 against the portion where the screw is to be tightened, and drives the electric screwdriver .
Thus, the screw 36 can be tightened. Upon this <br/> screwing operation, the suction tube 16, the driver bit
Because it is elastically mounted in the 14 axial direction , the screw 36 can be secured to the end without disturbing the screw tightening work.
And it can be securely tightened.

The screw supply holder 20 is moved forward and backward.
Dynamic and, by sucking and holding the screw 36 to the tip of the suction pipe 16 to the standby state of the screwing operation, the timing combined in a series of operations and therefore are outside provided <br/> is Ru control circuit of an electric gun body And a compressor , a suction machine, and the like .

Although the preferred embodiment of the present invention has been described above , the present invention is not limited to the above-described embodiment , and many design changes can be made without departing from the spirit of the present invention.
Can be done .

[0021]

As is clear from the above-described embodiment, the electric screwdriver according to the present invention having the screw automatic supply unit has a screwdriver bit detachably mounted on a rotary output shaft derived from the electric screwdriver body. A suction tube slightly protruding from the tip of the bit and surrounding the outer periphery thereof is elastically attached in the axial direction, and moves along the bit and the suction tube on the outer periphery of the suction tube, and moves along with the bit and the suction tube. A screw supply holding body for guiding a screw and temporarily holding the screw is attached to the tip of the suction pipe, and a first ventilation pipe is connected to the rear end of the suction pipe so as to suck the fluid in the suction pipe. The electric screwdriver is provided with an automatic screw supply unit configured to suck and hold the screw automatically supplied to the tip of the bit. While location, the cylinder,
Attached to the inclined state with respect to the support shaft which is fixed to the grip portion distal end side of the electric screwdriver body, one end of the operating shaft of the cylinder in the screw feed carrier via a universal joint
Connect the inclined state, which is fixed to the other end in the inclined state
Along with connecting to the cylinder, a second ventilation pipe and a third ventilation pipe are provided before and after the cylinder, and when the operating shaft of the cylinder is moved forward and backward by alternately supplying fluid to the ventilation pipe, The cylinder is configured to be swingable with the support shaft as a fulcrum, and the screw supply holding body is moved forward and backward along the suction pipe to suck and hold the screw automatically supplied to the tip of the driver bit. This allows the screw supply holder to move forward and backward easily without being affected by the size of the electric screwdriver body by the cylinder provided in an inclined state outside the electric screwdriver body.
With such a configuration, the suction tube can be extended to a sufficient length, and a number of excellent advantages can be obtained, such as screwing work in a narrow portion can be achieved smoothly and quickly.

[Brief description of the drawings]

FIG. 1 shows an embodiment of an electric screwdriver provided with an automatic screw supply unit according to the present invention , in which a screw supply holder is advanced.
It is principal part sectional side view which shows a state .

[Figure 2] in the electric screwdriver equipped with an automatic supply of screws shown in Figure 1, a main part showing a retracted state of the screw feed carrier
It is sectional side view.

FIG. 3 is a diagram illustrating a standby state of a screw tightening operation of a screw supply holding body in the electric screwdriver including the automatic screw supply unit illustrated in FIG . 1 ;
It is a principal part perspective view which shows a state .

[Explanation of symbols]

 10 Electric screwdriver body 12Rotary output shaft  14 Driver bit 16 Suction tube 18 FirstofVentilation pipe 20 Screw supply holder 22 Cylinder 24 Support shaft 26ActuationShaft 28 Universal joint 30 SecondofVent pipe 32 thirdofVent pipe 34 Screw supply pipe 36 Screw 38 Screw guide passage 40 Opening / closing claw 42 Swinging claw

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-86481 (JP, A) JP-A-57-136794 (JP, A) JP-A-49-103300 (JP, A) JP-A-63-1986 229238 (JP, A) Japanese Utility Model Showa 58-51972 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B23P 19/06 B25B 23/04

Claims (1)

(57) [Scope of request for utility model registration] 1. A suction device for detachably mounting a driver bit (14) on a rotary output shaft (12) derived from an electric screwdriver main body (10), slightly projecting from the tip of the bit and surrounding the outer periphery thereof. A pipe (16) is elastically mounted in the axial direction, moves forward and backward along the bit and the suction pipe on the outer periphery of the suction pipe, and guides a screw to the tip of the bit and the suction pipe to temporarily dispose the screw. A screw supply holder (20) to be held is attached, and a first ventilation pipe (18) is connected to the rear end side of the suction pipe so that the fluid in the suction pipe is suctioned to the tip end of the bit. An electric screwdriver provided with an automatic screw supply unit configured to suck and hold an automatically supplied screw (36), wherein a cylinder (22) is provided outside the electric screwdriver body (10).
And tilt the cylinder with respect to the support shaft (24) fixed to the gripper tip of the electric screwdriver body.
Mounting state, the screw supply holder one end of the operating shaft of the cylinder (26) via a universal joint (28) (20)
To the inclined state, and the other end is fixed to the inclined state
A second ventilation pipe (30) and a third ventilation pipe (32) connected to a cylinder (22) and before and after said cylinder;
When the operating shaft (26) of the cylinder (22) is moved forward and backward by alternately supplying a fluid to the ventilation pipes (30, 32), the cylinder is connected to the support shaft (2).
The screw supply holder (20) is configured to be swingable around the fulcrum, and the screw supply holder (20) is moved forward and backward along the suction pipe (16) to suck the screw automatically supplied to the tip of the driver bit (14). An electric screwdriver having an automatic screw supply unit, characterized in that the screwdriver is configured to hold the screw.