JP3114423U - Screwdriver with sleeve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a screwdriver with a sleeve capable of remarkably improving the efficiency of an operation for tightening or loosening a small diameter screw.
SOLUTION: For a driver having a configuration capable of holding a screw to be tightened or a loosened screw by a bit, a sleeve pipe 17 is fitted on the outside of a driver shaft 15 having a bit part 14 at the tip, and the bit part 14 is covered. The sleeve pipe 17 is slidable in the axial direction between the forward position and the retracted position where the bit portion 14 is exposed, and the sleeve pipe 17 is urged in the forward direction by the urging means 19.
[Selection] Figure 3

Description

  The present invention relates to a screwdriver with a sleeve having a configuration capable of holding a screw to be tightened or loosened by a bit.

  When a small-diameter set screw is screwed into a female screw using a screwdriver, there is a problem that it is difficult to screw straight into the screw hole due to its small size. This is considered to be a problem due to the fact that it is difficult to clearly determine the axial direction of the set screw due to its small size and whether it is difficult to determine whether the orientation is kept constant. Also, when using a flathead screwdriver, the tip of the screwdriver slips out of the negative groove of the set screw, and if the screw is tightened with force at the final stage, the negative groove is easily broken and damaged.

  As a prior art capable of holding a screw, for example, there is a device of utility model registration No. 3086077, and this device integrally attaches an attachment having a holding space to a bolt head and a washer in close contact with the tip of the sleeve. It can be attached and detached while holding the screw or bolt. However, even if it is effective for a screw or bolt having a head and a washer, it cannot be effective for a small-diameter set screw in which the head also has no washer.

Utility model registration No. 3086077

  The present invention has been made paying attention to the above points, and an object thereof is to provide a screwdriver with a sleeve capable of remarkably improving the efficiency of an operation for tightening or loosening a small-diameter screw.

  In order to solve the above-described problems, the present invention provides a screwdriver with a sleeve having a configuration capable of holding a screw to be tightened or a loosened screw by a bit so that a driver shaft having a bit portion at the tip is not rotated to the tip of the driver body. The sleeve pipe is fitted on the outside of the driver shaft and slidable in the shaft axial direction between the forward position covering the bit portion and the backward position exposing the bit portion. The means to urge in the forward direction is taken.

  Therefore, the above-mentioned screw to be the subject of the present invention is a small-diameter screw and a small-diameter screw having no so-called screw head (head) or washer. Such a small-diameter screw has a cylindrical appearance obtained by cutting a male screw into an appropriate length, and has a negative groove for a driver formed at the cut end. It is also possible to form grooves other than the minus type. In order to hold a small-diameter screw with a cylindrical appearance and a groove of minus type, plus type, hexagonal type, hexalobular type etc. at the end, a sleeve pipe is fitted on the outside of the driver shaft and the shaft shaft Provide slidable in the direction.

  The driver shaft and sleeve pipe configured in this way can cover the bit part at the tip of the driver shaft by sliding the sleeve pipe to the forward position, and also expose the bit part by sliding to the backward position. Can be made. When the sleeve pipe is slid to the advanced position and the bit part is covered, the cylindrical small diameter screw fits into the cylindrical space at the tip of the sleeve pipe, and the bit part engages with the small diameter screw groove in that state. To do. Further, since the screw advances as the screw having a small diameter is screwed by rotation of the driver shaft, the screw is exposed from the sleeve pipe (see FIGS. 2A and 2B).

  When the sleeve pipe is provided so as to be slidable in the shaft axial direction relative to the driver shaft, the sleeve pipe is urged in the forward direction by the urging means when the sleeve pipe slides in the backward direction. The biasing means is accumulating. The urging means that has accumulated pressure serves as a force for returning the sleeve pipe to its original position. When the sleeve pipe returns to its original position, a cylindrical space for accommodating a small diameter set screw is formed inside the sleeve pipe.

  A cap to be attached to the tip of the driver body is provided, and this cap forms a small hole for retaining the stopper through the pipe portion of the sleeve pipe. The inserted sleeve pipe can be attached to the driver body. With this configuration, the driver shaft, the sleeve pipe, and the biasing means can be assembled with a single cap.

Since the present invention is constructed and operates as described above, the efficiency of the work of tightening the small-diameter set screw can be remarkably improved, and also when the tightened set screw is loosened and removed, the stop is similarly performed. Since the screw can be held and removed, the operation can be performed accurately, and loss can be prevented. Furthermore, even with a small-diameter screw having a negative groove at the end, there is no possibility that the tip of the driver slips or peels off due to the tightening force.

  Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. FIG. 1 shows the appearance of a screwdriver 10 with a sleeve according to the present invention, 11 is a driver main body, and 12 is a hollow portion formed at the front end portion of the screwdriver body and toward the inside.

  As shown in more detail in FIG. 2, the hollow portion 12 is provided with a small-diameter fitting hole 13, and the base end portion 16 of the driver shaft 15 having the bit portion 14 at the tip is fitted into the fitting hole. It is press-fitted into the part 13 and is located at the end of the cavity part 12 so as not to rotate. A sleeve pipe 17 is disposed outside the driver shaft 15, and the sleeve pipe 17 is moved forward with respect to the driver shaft 15 (FIG. 2A) and retracted with respect to the bit portion 14 (FIG. 2B). Is slidable in the shaft axial direction. The bit portion 14 is partially covered at the forward position, but the degree of covering is a matter that can be arbitrarily set.

  The illustrated sleeve pipe 17 has a flange-shaped retainer 18 at the base end, and a coil spring in which one end is in contact with the retainer 18 and the other end is in contact with the end face of the cavity 12 is urging means. 19, the sleeve pipe 17 is urged in the forward direction. The sleeve pipe 17 is attached to the distal end portion of the driver main body 11 by a cap 20.

  The cap 20 is a hollow member having a longitudinal cross-sectional shape that is tapered toward the tip, and has a small hole 21 that engages the stopper 18 through the pipe portion of the sleeve pipe 17 at the center of the tip. ing. The illustrated cap 20 is provided with a plurality of elastic engagement pieces 22 by partially removing the widened end portion on the base side, and further provided with a latching portion 23 at the end portion, so that the tip end portion of the driver main body 11 is provided. It is possible to engage with a latching groove 24 provided on the surface.

  Therefore, if one cap 20 is attached, the driver shaft 15, the sleeve pipe 17 and the urging means 19 can be assembled. Conversely, if one cap 20 is removed, all of the parts are disassembled. In order to attach the cap 20, the configuration using the elasticity of the engaging piece 22 is adopted in the illustrated example, but the configuration is not limited to this, and a screw is cut inside the base end portion of the cap 20 and screwed to the driver body side. Any known attachment method such as can be applied.

  At the time of use, the small diameter screw 26 is stored in the cylindrical space 25 from the opening at the front end of the sleeve pipe 17 and is set so that the bit portion 14 engages with the negative or positive groove. In this state, the small-diameter screw 26 is held in the space 25 of the sleeve pipe 17 and will not come out even if it is turned downward while it is housed. good. Then, the screwdriver 10 with the sleeve in which the small-diameter screw 26 is set is directed to the screw hole 28 of the target female screw portion 27 and tightened.

The set screw 26 is integrated with the screwdriver by the sleeve pipe 17, and it is easy to screw straight into the screw hole 28, and the small diameter screw 26 does not enter the screw hole 28, or the bit portion 14 is the small diameter screw 26. It will not come off the groove and workability will be greatly improved. Further, even when finally tightened with force, the sleeve pipe 17 suppresses deformation of the outer shape of the small-diameter screw 26, so that breakage can be prevented. Further, even when all the small diameter screws 26 enter the screw holes 28, the sleeve pipe 17 moves backward while compressing the biasing means 19, so that the set screw 26 can be tightened to the end.

The front view which shows one example of the screwdriver with a sleeve which concerns on this invention. FIG. 4 is an enlarged view showing an example of a usage state, in which A is a state in which a small-diameter screw is held at the tip of a screwdriver and screwing is started, and B is a cross-sectional view showing a state in which a screw is inserted to the inside of a female screw. The longitudinal cross-sectional view which expands and shows the principal part of the thing of this invention. The perspective view which shows the cap with which a driver main body is mounted | worn. The expanded longitudinal cross-sectional view of the thing same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Screwdriver with sleeve 11 Driver main body 12 Cavity part 13 Fitting hole part 14 Bit part 15 Driver shaft 16 Base end part 17 Sleeve pipe 18 Retaining prevention 19 Energizing means 20 Cap 21 Small hole 22 Engaging piece 23 Retaining prevention part 24 Detachment Stop groove 25 Space 26 Small-diameter screw 27 Female thread 28 Screw hole

Claims (3)

A screwdriver that has a structure capable of holding a screw to be tightened or loosened by a bit, and a screwdriver shaft having a bit portion at the tip is attached to the tip of the driver body so as not to rotate, and a sleeve pipe is attached to the outside of the driver shaft. The sleeve pipe is slidably provided in the shaft axial direction between an advanced position covering the bit portion and a retracted position exposing the bit portion, and the sleeve pipe is urged in the forward direction by the urging means. A screwdriver with a sleeve. A cap to be attached to the tip of the driver body is provided, and this cap forms a small hole that locks the stopper through the pipe portion of the sleeve pipe. 2. The screwdriver with a sleeve according to claim 1, wherein the inserted sleeve pipe is attached to the driver main body. 2. The screwdriver with a sleeve according to claim 1, wherein the screw is a small-diameter screw having a cylindrical appearance and a negative or other groove at an end.

Images