JPS6015666Y2 - screw extractor - Google Patents

Description

[Detailed description of the invention] The present invention is to attach screws of a specific shape that are loosely fitted in advance to the mounting frame of the glass cover of the electricity meter, the extension terminal cover, etc. so that they cannot fall off naturally. The present invention relates to a device that can be extracted extremely easily and with high efficiency.

The screw 11 of a specific shape attached to the above-mentioned mounting frame etc. has a drive groove 25 carved in the top surface of the rod-shaped head 24, and a constriction in the middle between the screw part 26 and the head 24 in which the male thread is screwed. The screw 11 can be attached to the extension terminal cover 28 of the integrated wattmeter 30 or the glass cover mounting frame 2.
The rod-shaped portion 27 is loosely fitted into a hole 29 formed in the hole 8', etc., and is attached to the cover 28 or the like.

The integrating electricity meter 30 is installed exposed outside in a general home or other place, and the extension terminal cover etc. are easily rusted or damaged. 11 from the cover 28 etc.

However, the screw 11 is attached to the cover 28 etc. in a state of loose play, and furthermore,
The thread is a long tube, and in the past all removal was done manually using pliers, etc., but when done manually, the screw 11 gets stuck in the hole 29 and cannot be removed easily.
This process requires a considerable amount of force and requires careful unscrewing and removal, making it a cumbersome, low-efficiency, and extremely uneconomical process.

In particular, when removing the screws 11 from the extension terminal cover 28, if the screws 11 are forcibly pulled out, the holes 32 of the inner rubber packing 31 are often seriously damaged, which has been considered a major problem.

The present invention was devised in view of such circumstances.

An embodiment of the present invention will be described with reference to the drawings, which show an entire driver.

The driver 1 consists of a rotating shaft 3, a bearing part 3' that is controlled to rise and fall together with the shaft 3, and a chuck 4. The bearing part 3' is installed on a fixed frame 2 so that it can be raised and lowered, and the rotating shaft 3 is installed appropriately. It is provided so as to be driven to rotate at high speed by a motor 4.

A box spanner 5 is attached to a chuck 4 attached to the tip of the rotating shaft 3.

This driver 1 is fixed, for example, to a power arm 7 of an air cylinder 6 fixed to an underframe 2.

The air cylinder 6 is operated by the foot switch 8.
Compressed air is supplied to lower the driver 1, and
When the compressed air in the air cylinder 6 is exhausted as described below, the arm 7 is restored by the spring 9,
Raise driver 1.

As will be described later, the receiver pin 10 is fixed upright on the base plate 33 vertically facing the box spanner 5 at a set interval.

Further, in the receiver, a conical screw receiving hole 12 that opens upward is carved at the tip of the pin 10.

The metal receiver 13 is the screw guide hole 1 opened in the shape of a funnel in the head 14.
It is a cylindrical body with a hole 5 bored therein, and is installed inside an outer cylinder 16 which is fixed upright on a base plate 33 so as to be able to freely slide up and down.

17 is a vertical keyway drilled into the cylinder wall of gold 13,
A key 18 provided on the cylindrical wall of the outer cylinder 16 engages with the key groove 17, and the receiver restricts the vertical sliding movement of the metal 13 to a set dimension.

Further, the receiver 13 is provided so that the receiver 13 stands upright in the cylinder and is elastically supported by a coil spring 19 fitted to the pin 10 so as to be freely raised and lowered.

If the receiver is the top a of the gold 13 and the lower end of the box spanner 5, then the relative position of the receiver with the upper end C of the pin 10 during the screw removal operation is a and b when a is at the highest position. The distance 1 is slightly larger than the length of the screw 11, and when a is at the lowest position, C is set to be located above a (FIGS. 1 and 6).

The switch 20 is ON/OFF, and the metal 21 is connected to the outer cylinder 16.
The receiver extends to the bottom of the metal 13 and faces the opening 23 bored in the wall, and when the metal 13 is at its lowest position, the switch is turned ON and the pressurized air in the air cylinder 6 is released from the outlet 22, causing the driver to 1 so that it can return upward.

Next, the device for extracting the screw 11 from the threaded extension terminal cover 28 will be explained. First, attach the box spanner 5, turn the screwdriver 1 at the highest position at high speed (7000 to 8000 r, p, m
) to operate continuously (always rotating during work).

Second, attach the cover 28 with the box spanner 5 and the holder with gold 13.
Insert the screw head 24 horizontally by hand between
Insert and engage the box spanner 5.

Thirdly, when the foot switch 8 is pressed, the air cylinder 6
Air is supplied to the driver 1, and the driver 1 descends.

Fourth, the tip of the screw 11 is inserted into the guide hole 15 according to the descent.
The tip of the screw 11 is guided inward by its conical shape, and fits into and abuts the screw socket hole 12, and the screw 11 is supported between the driver 1 and the socket pin 10 (while remaining in a rotating state).
.

Fifth, the cover 28 held horizontally in the hand is manually pushed down vertically.

Sixthly, by pressing down, the cover 28 comes into pressure contact with the upper surface of the tip of the metal plate 13, and the plate and the plate 13 pass through the tip of the pin 10 and descend to a position below the pin 10 (see Fig. 7).
.

During this descending process, the screw 11 is threaded into the hole 29 of the cover 28 and is forcefully rotated, almost instantaneously closing the hole 29.
The screw out comes out more easily.

Seventh, the lower end of the metal 13 of the receiver is the operating metal 21 of the switch 20.
Press down.

Eighth, when the switch 20 is turned on by the actuation metal 21, the compressed air in the air cylinder 6 is released from the exhaust hole 22, and the driver 1 is raised and restored by the spring 9.
Therefore, since the pin 10 of the driver 1 and the receiver are separated,
The unsupported screw 11 separates from the box spanner 5 and falls.

Next, the extension terminal cover 28, in which the pin 10 is inserted into the hole 29, is lifted vertically by hand and removed.

Incidentally, the lifting and lowering control of the driver 1 is not limited to the one that uses an air cylinder as described above, but can also be performed using an appropriate foot lever, wire, crank bar, etc., although I would like to illustrate it. This includes the case where the driver, receiver, etc. are controlled to move up and down using an appropriate method in synchronization with the order and timing of operations of the handles, etc.

As described above, the present invention has a simple structure and can quickly, reliably, and easily remove screws from an extension terminal cover, etc., without damaging the screws and the cover, and in particular removes the rubber backing of the extension terminal cover. It does not cause any damage and provides great benefits.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional front view of the present invention, Fig. 2 is a perspective view of the box spanner and screw, Fig. 3 is a side view of the receiver made of gold, and Fig. 4 is a side view of the box spanner and screw.
5 is a perspective view of an extension terminal cover thereof, and FIG. 6 is an explanatory view of the operation of removing a screw. Number, 1...Driver, 3...Rotating shaft, 3'...Bearing section, 4...Chuck, 5...Box Spanner - 16... Air cylinder - 18... Foot switch, 9.
・・・・・・Spring, 10・・・・・・Receiver is pin, 1
1...screw, 12...screw holder is recessed hole,
13...The receiver is gold, 15...Screw guide hole, 16...Outer cylinder, 19...Coil spring, 20... ...Switch, 21...
...Operating metal, 28...Extension terminal cover, 30
・・・・・・Integrated electricity meter.

Claims (1)

[Scope of Claim for Utility Model Registration] A driver 1 with a box spanner 5 removably attached to the lower end of a rotating shaft 3 is installed to drive high-speed rotation and can be freely controlled up and down, while a screw receiving hole 12 is carved in the front end. The received pin 10 is fixed upright on a base 33 in a support 13 which is elastically movable up and down to a predetermined size using a spring 19, and the box spanner 5 at the lower end of the driver 1 and the support are The screw receiving hole 12 of the pin 10 is installed oppositely on one axis, and the receiver is the head a of the metal 13 and the lower end of the box spanner 5 at the lower end of the screwdriver 1, then the receiver is the upper end c of the pin 10 (i.e., Regarding the relative positions of the three screw receiving holes 12), when a is at the highest position, the interval 1 between a and b is larger than the length of the screw to be extracted, and when a is at the lowest position, C is a. A screw extractor set to be located higher up.