JPH0344458Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the ejection of chips from a bolt tightening tool for tightening Torsia-type high-strength bolts.

Conventional bolt tightening machines that tighten Torcia-type high-strength bolts use the energy necessary to eject chips remaining after bolt tightening by compressing a spring when the operator inserts the main body into the bolt to be tightened. A storage method is used. However, with this method, when inserting the main body, it is necessary to push in with a force greater than the compressive load of the spring, so especially in upward tightening work, the main body load is added,
There are disadvantages in operability, such as the pushing load being large and being very tiring.

The purpose of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to improve the operability of a bolt tightening machine.

The present invention uses a solenoid coil to provide energy for ejecting chips, and the relationship between the solenoid coil and the push rod is devised.

An embodiment of the present invention will be described below. 1st
The figure is a longitudinal sectional side view showing only one embodiment of the present invention. FIG. 2 is a longitudinal sectional side view of the tip portion that fits into the tip.

The configuration will be explained below using figures.

The solenoid coil 1 is embedded in an inner cover 2 and fixed by a damper 3. The push rod 7 is integrated with the push weight 8 and the solenoid coil 1
It is loosely fitted into the center of the planetary gear mechanism 9, and is biased toward the damper 3 by a spring 10.
The spring 10 is interposed between the inner surface of the inner socket 11 into which a bolt tip (hereinafter referred to as a chip) (not shown) fits and the tip end of the push rod 7, and the spring 10 maintains the push rod in the retreated position. There is. 5 is a switch connected to the solenoid coil 1 via a control circuit 6;
This switch 5 is turned on by rotating the trigger 4 downward, and the solenoid coil is energized. Reference numeral 12 indicates an outer socket into which a nut (not shown) is fitted.

Next, the operation will be explained.

When the trigger 4 is pulled, a circuit consisting of the power supply, switch 5, control circuit 6, and solenoid coil 1 is established, the solenoid coil 1 is energized, the push rod 7 is attracted, and moves toward the tip while compressing the spring 10. , Push weight 8 is the inner socket 11
The remaining chips (not shown) are struck and ejected. Since the control circuit 6 allows current to flow only instantaneously,
After the chips are ejected, the suction force becomes zero and the push rod 7 returns to its initial position by the elastic force of the spring 10.

As an effect of this embodiment, when the tip and the inner socket 11 are too tightly fitted to be ejected at once, the tip can be struck and ejected as many times as desired by pulling the trigger 4.

According to this proposal, the energy for ejecting the chips is generated using a solenoid coil.
It is possible to reduce the pushing load when inserting the main body into the bolt to be tightened, and improve operability.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view showing an embodiment of the present invention. FIG. 2 is a longitudinal sectional side view of the tip of the tightening tool. In the figure, 1 is a solenoid coil, and 7 is an extrusion rod.

Claims (1)

[Scope of utility model registration request] an inner socket into which the tip at the tip of the bolt fits; an outer socket which is rotatably disposed around the outer periphery of the socket and fits into the nut; and an axially reciprocating socket that applies a blow to the bolt tip and ejects the bolt tip after the bolt tip is broken. A bolt tightening tool equipped with a movable push-out rod, a spring interposed between the inner surface of the inner socket and the tip side of the push-out rod to maintain the push-out rod in a retreated position, and a rear end of the push-out rod. A bolt tightening method characterized by comprising a solenoid coil disposed on the side, a switch connected to the solenoid coil, and a trigger that operates the switch to excite the solenoid coil and move the push rod forward. tool.