JPH0617877U - Screw tightening tool with external damage prevention tool - Google Patents

Abstract

(57) [Abstract] [Purpose] Even if the bit comes off the screw, the member to be screwed should not be damaged. [Structure] A contact rod 11 that comes into contact with a surface of a member to be screwed F is attached to a screw tightening tool body 1, and the contact rod 1 is further attached.
The auxiliary rod 18 that abuts on the edge of the member F to be screwed
Even if the bit 2 is detached from the screw s, the elastic force of the coil spring 17 acting on the rear end of the contact rod 11 and the auxiliary rod 18 abutting on the edge of the member to be screwed F are attached. , The tip of the bit 2 is in contact with the outer surface Fs of the member F to be screwed so as not to scratch it.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a screw tightening tool with a damage preventive tool that prevents a member to be screw-tightened from being damaged by a bit disengaged from a screw.

[0002]

[Prior art]

 When tightening the screw using a screw tightening tool, the screw holes of the workpieces do not match, the tip of the bit is not completely fitted in the recess of the screw head, or it is not in the recess of the screw head. If foreign matter such as paint is clogged, the bit will come off the screw and scratch the surface of the screwed member.

In particular, when the member to be screwed is a urethane bumper of an automobile, even if the tip of the bit is lightly touched, it is easily scratched. Therefore, when screwing to such a member, , Hold the screw tightening tool with your right hand so that the bit removed from the screw fits inside your fingertip, and wrap the screw with your fingertip while holding the tip of the tool with your left hand to tighten the screw. .

However, such a screw tightening method has a problem that the fingertip may be damaged when the bit comes off, and it is extremely difficult to screw the member on the moving conveyor. is doing.

[0005]

[Problems to be solved by the device]

 The present invention has been made in view of such a problem, and an object thereof is to provide a screw tightening tool with a new external damage preventive tool that does not scratch the surface of the screw tightening member even if the bit comes off. To provide.

[0006]

[Means for Solving the Problems]

 That is, the present invention provides a screw tightening tool with an external damage preventive tool for achieving such a problem, in which a member that comes into contact with the front surface or the edge of the member to be screwed is attached to one side of the bit of the screw tightening tool body. It is attached so that it protrudes forward from the tip of the bit and is closer than the distance from the shaft center of the screw to be tightened to the external damage-prevented area on the member to be screwed.

[0007]

【Example】

 Therefore, an embodiment of the present invention will be described below. The drawings show an embodiment of the present invention configured as a tool for screwing to the rear bumper face.

In the figure, reference numeral 1 is a screw tightening tool main body having a bit 2 attached to the tip thereof. In the tool main body 1, an external damage prevention tool 10 described later is arranged in parallel with the axis of the bit 2. The band 3 and the tightening screw 4 are integrally attached.

This trauma preventive tool 10 minimizes the blind movement in the axial direction of the bit 2 and the blind movement in the direction perpendicular to the axis when the bit 2 comes off the screw s so that the tip of the bit 2 is In order to prevent the screwed member, that is, the outer surface Fs of the rear bumper face F in this embodiment from coming into contact with the member, the damage preventive tool 10 is a contact rod that contacts the front surface of the rear bumper face F. 11, a support pipe 14 that supports the contact rod 11 so as to be movable back and forth, and a contact auxiliary rod 18 fixed to the tip of the contact rod 11. The contact rod 11 is mounted in a long hole 15 provided in the support pipe 14 so as to move forward and backward by a screw 12 and is also interposed between the contact rod 11 and a spring receiver 16 at the rear end of the support pipe 14. Even when the bit 2 comes off, the contact piece 13 made of an elastic material attached to the tip of the rear bumper face F is constantly urged by the The elastic force of the coil spring 17 prevents the tip of the bit 2 from coming into contact with the rear bumper face F.

A contact auxiliary rod 18 is fixed to the contact rod 11 and at the tip thereof so as to project forward from the contact rod 11. This sub rod 18 is for minimizing the axial displacement of the bit 2 when it comes off, and is arranged on the opposite side of the bit 2 so as to sandwich the contact rod 11 and to the outer edge of the rear bumper face F. The distance δ is fixed to the tip of the contact rod 11 so as to be narrower than the distance L from the axial center of the screw s to be tightened to the outer surface Fs of the rear bumper face that should not be damaged. In addition, reference numeral 19 in the drawing denotes a cover made of an elastic material fitted to the tip of the auxiliary rod 18.

In order to tighten the rear beam B inside the rear bumper face F by using the screw tightening tool configured as described above, the tip of the bit 2 is moved toward the screw s inserted in the screw hole h of the both. Then, first, the tip of the contact rod 11 protruding forward of the bit 2 is loosely contacted with the surface of the rear bumper face F by the coil spring 17, and then the tip of the bit 2 is fitted into the recess of the screw s. In this case, the screw s is tightened by the same operation as the normal screw tightening operation.

On the other hand, in the event that the bit 2 is disengaged from the recess of the screw s during the process of connecting the screw s and the bit 2 or the process of tightening the screw s, the tool pushed in the screwing direction. 1 The bit 2 at the tip is projected toward the rear bumper face F, but the coil spring 17 acting on the rear end of the contact rod 11 causes the tip of the bit 2 to move to the surface of the rear bumper face F due to its elastic force. To prevent contact with.

Further, at this time, when the bit 2 comes off on the outer surface Fs side of the rear bumper face F, that is, on the lower side in FIG. 1, at the same time as suppressing the axial protrusion by the coil spring 17, The secondary rod 18 abuts on the edge of the rear bumper face F, and the tip of the bit 2 is doubly prevented from coming into contact with the outer surface Fs of the rear bumper face F.

On the other hand, as shown in FIG. 3, when the screw s is tightened to the position B where the screw hole h is narrower than the position A with respect to the edge of the rear bumper face F, as shown in FIG. The screw tightening operation is performed with the contact rod 11 protruding from the rear bumper face F.

As a result, even if the bit 2 should come off the outer surface Fs side of the rear bumper face F, the contact rod 11 will directly contact the edge of the rear bumper face F, and the bit 2 It is possible to prevent the tip of the vehicle from coming into contact with the outer surface Fs of the rear bumper face F.

Although the present invention has been described above with reference to an example of a tool for tightening a screw on the rear bumper face, as long as it has a screw hole near the outer edge, it can be used for other tightened members to be screwed. Needless to say, the screw tightening tool of the present invention can be applied.

[0017]

[Effect of device]

 As described above, according to the present invention, the member that comes into contact with the front surface or the edge of the member to be screwed is projected from the tip of the bit, and the distance from the injury-prevented area on the member to be screwed is larger than the distance. Since they are mounted close to each other, even if the bit should come off to the injury-prohibited area side, the abutting member that projects forward from the bit will first come into contact with the edge of the screw tightening member, It is possible to prevent such a situation that a part touches the surface of the external damage prevention part, and to perform this kind of screw tightening work more safely and efficiently.

[Brief description of drawings]

FIG. 1 is a side view of an apparatus according to an embodiment of the present invention shown in a screw tightened state.

FIG. 2 is a view showing another external damage prevention operation of the same apparatus.

FIG. 3 is a plan view showing an example of a screw tightening member.

[Explanation of symbols]

 1 Screw tightening tool main body 2 Bit 10 Damage prevention tool 11 Contact rod 14 Support pipe 17 Coil spring 18 Abutment auxiliary rod F Rear bumper face Fs Outer surface s Screw

Claims (2)

[Scope of utility model registration request] 1. A member that abuts a front surface or an edge of a screw tightening member on one side of a bit of a screw tightening tool main body, projects forward from a tip of the bit, and is screwed from an axial center of a screw to be tightened. A screw tightening tool with an external damage preventive tool, characterized in that the screw tightening tool is installed closer than the distance to the external damage prevention area on the tightening member. 2. The abutting member is biased by a biasing member so as to project forward from the tip of the bit, and is located on the opposite side to the injury-prohibited region on the screw tightened member. The screw-fastening tool with a trauma preventer according to claim 1, wherein a sub-contact member that contacts the edge of the screw-fastened member is attached to the upper portion.