JP3033009U - High torque screw and its driving tool - Google Patents

Abstract

(57) [Abstract] [Problem] Simply inserting the tip into the drive groove allows quick and easy centering, and the engagement state can be firmly secured. (EN) Provided are a high torque screw and a driving tool therefor capable of preventing the door from coming off and accidentally damaging a door or a wall. A screw having a linear drive groove formed in a screw head, wherein an inner wall surface 2a of the drive groove 2 and a inner wall surface 3a flush with the inner wall surface 2a of the drive groove 2 are formed in a central portion of the bottom surface 2b of the drive groove 2. The provided recess 3 is formed in a rectangular parallelepiped shape. Further, the drive tool is one in which the tip 4a of the tip 4 is formed in a straight line and the drive groove 2 of the screw head 1 is used for a linear screw, and a rectangular parallelepiped is formed at the center position of the tip 4a of the tip 4. The outer wall surfaces 5a before and after the projection 5 are formed flush with the outer wall surfaces 4b before and after the tip 4.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a high torque screw and its driving tool, and more specifically, it is formed so that the driving tool can be easily and quickly centered on the screw, the engaged state can be secured, and the screw tightening work can be facilitated. High torque screw and its driving tool.

[0002]

[Prior art]

 Conventionally, as this type of screw, a drive groove is formed on the screw head in a straight or cross shape, and as a driving tool for the screw, the tip of the tip is formed in a straight or cross shape, and the drive groove of the screw head is formed. There are tools such as flat-blade screwdrivers and plastic screwdrivers that are used for straight and cross-shaped screws.

[0003]

[Problems to be solved by the invention]

 By the way, with this type of conventional screw and drive tool, the tips of the corresponding tool are engaged with the drive grooves of a linear or cross-shaped screw to perform work such as tightening the screw, so it is It was easy to remove the tip from the drive groove depending on the insertion condition. As a result, when using the conventional product, there is a problem that the periphery of the drive groove is easily crushed, and the tip of the driver is apt to damage the door or the wall.

Further, in the case of the conventional product, since the tip of the tool only engages with the drive groove of the screw and the tip of the tool cannot be centered on the screw, an operator can use one hand to tighten the screw when tightening the screw. It was necessary to hold the tool and hold the tip of the tool while watching the drive groove of the screw with the other hand. As a result, according to the conventional product, work such as screw tightening is inconvenient.

The present invention is intended to solve the problems of such conventional products. Therefore, the technical problem of this proposal is that the tip can be easily and quickly aligned by simply inserting the tip into the drive groove, and the engagement state can be secured. It is an object of the present invention to provide a high torque screw formed so as to prevent the tip of the head from coming off and accidentally damaging a door or a wall, and a driving tool therefor.

[0006]

[Means for Solving the Problems]

 The present invention adopts the following technical means to solve the above problems. That is, the high torque screw of the present invention is a screw in which a linear drive groove 2 is formed on the screw head 1, and the drive groove 2 has a center surface of the bottom surface 2b which is flush with the inner wall surface 2a of the drive groove 2. The recess 3 having the inner wall surface 3a is formed in a rectangular parallelepiped shape.

Another structure of the high torque screw of the present invention is a screw in which a cross-shaped drive groove 2 is formed on a screw head 1, and the screw groove 1 is formed at an intersection point position of the arc-shaped bottom surface 2c of the drive groove 2. There is one characterized in that a cylindrical recess 3 is formed.

Further, the drive tool of the present invention is a drive tool in which the tip 4a of the tip 4 is formed linearly, and the drive groove 2 of the screw head 1 is used for a linear screw, and the tip 4a of the tip 4 is A rectangular parallelepiped projection 5 is formed at a central position, and front and rear outer wall surfaces 5a of the projection 5 are formed flush with front and rear outer wall surfaces 4b of the tip 4.

Further, as another configuration of the drive tool of the present invention, the tip 4 is formed in a cross-shaped cross section, and the drive groove 2 of the screw head 1 is used for a cross-shaped screw. A cylindrical projection 5 is formed at the intersection of the fitting blades 4c.

[0010]

[Embodiment of the invention]

 Embodiments of the present screw and the driving tool will be described below with reference to the accompanying drawings. Reference numeral 1 is a screw head, and 2 is a linear drive groove formed in the screw head 1. Reference numeral 3 denotes a recess having an inner wall surface 2a of the drive groove 2 and an inner wall surface 3a flush with the inner wall surface 2a. The recess 3 is formed in a rectangular parallelepiped shape at the center of the bottom surface 2b of the drive groove 2.

In this case, the size of the recess 3 is arbitrary. Further, the screw of the present invention includes, for example, a machine screw and a wood screw, and the shape of the screw head 1 includes a round shape, a flat shape, a round shape, a pan, a flat shape, a round flat shape, a truss, and a brazier.

Reference numeral 4 is the tip of a flat-blade screwdriver as the drive tool of the present invention. The tip 4a of the tip 4 is formed in a linear shape, and is used for the above-described screw of the present invention in which the drive groove 2 of the screw head 1 is formed in a linear shape. Reference numeral 5 is a rectangular parallelepiped projection formed at the center of the tip 4 a of the tip 4.

The projection 5 has front and rear outer wall surfaces 5 a formed flush with the front and rear outer wall surfaces 4 b of the tip 4. The size of the protrusion 5 is appropriately selected according to the recess 3 of the screw.

Next, the operation of the present screw and tool will be described. The user inserts the tip 4 of the tool of the present invention into the drive groove 2 of the screw. Then, in the tip 4, the protrusion 5 fits into the recess 3 of the screw, and in that state, engages with the drive groove 2. In this case, the outer wall surface 5a of the protrusion 5 is formed flush with the outer wall surface 4b of the tip 4, and the inner wall surface 3a of the recess 3 is formed flush with the inner wall surface 2a of the drive groove 2. According to the method, the tool can be smoothly inserted and removed with respect to the screw, and the projection 5 can be closely engaged with the recess 3 without any gap. In the case of the present invention, since the tip 4 is firmly engaged with the drive groove 2 because the protrusion 5 and the recess 3 are fitted to each other, the ear tip 4 does not interfere with the drive groove 2 even if the screw is tightened or loosened. It does not come off, and there is no crushing around the drive groove 2.

In the above process, in the screw of the present invention, as shown in FIGS. 3 and 4, the drive groove 2 is formed in a cross shape, and at the intersection point position of the arcuately recessed bottom surface 2 c of the drive groove 2, It may be formed by forming a cylindrical recess 3. In this case, the diameter of the recess 3 is arbitrary. Further, for example, when the shaft of the screw is thin and it is difficult to process the recess 3, as shown in FIG. 5, a root 7 for forming the recess 3 is provided at the bottom of the screw head 1, and the male screw 6 is left with the root 7 left. Should be formed.

As shown in FIG. 3, the tool of the present invention is a drive tool in which a tip 4 is formed in a cross-shaped cross section and a drive groove 2 of a screw head 1 is used for a cross-shaped screw. A cylindrical projection 5 may be formed at the intersection of the fitting blades 4c of the tip 4. In the case of the tool of the present invention, since the projection 5 has a columnar shape, the centering with the screw of the present invention in which the recess 3 has a cylindrical shape can be easily and quickly performed. In addition to the plus driver, the tool of the present invention includes a driver bit 9 of an electric driver 8 as shown in FIG.

Also in the case where the screw and the tool according to the present invention are configured as shown in FIG. 3, as in the case of the above example, the engagement state between the recess 3 of the drive groove 2 and the protrusion 5 of the tip 4 is improved, Has similar effects.

[0018]

[Effect of the invention]

 As described above, the screw and the drive tool of the present invention have the recess formed in the drive groove and the protrusion formed on the tip of the tip of the drive tool, so that simply inserting the tip into the drive groove enables quick and easy alignment. In addition, since it can be shaped in a firm state, not only can the screw tightening work be facilitated, but it is also a practical advantage that the tip of the tool can prevent the periphery of the drive groove from being crushed and prevent accidental damage to the door or wall. Produce the effect.

[Brief description of the drawings]

FIG. 1A is a front view of a main part of the present invention with a screw and a part of a drive tool cut away, and B is an enlarged cross-sectional view taken along line BB of A.

FIG. 2 shows a screw of the present invention, in which A is a plan view and B is a front view of a main part.

FIG. 3A is a front view of a main part of another screw of the present invention and a part of a drive tool, which is partially cut away, and B is an enlarged sectional view taken along line BB of A.

FIG. 4 shows another screw of the present invention, in which A is a plan view and B is a front view of a main part.

FIG. 5 is a front view of an essential part showing still another embodiment of the present screw.

FIG. 6 is a side view of another embodiment of the drive tool according to the present invention in use.

[Explanation of symbols]

 1 screw head 2 drive groove 2a inner wall surface 2b bottom surface 3 recess 3a inner wall surface

Claims (4)

[Utility model registration claims] 1. A screw having a linear drive groove formed on a screw head, wherein a recess having a drive groove inner wall surface and a flush inner wall surface is formed in a central portion of a bottom surface of the drive groove. High-torque screw characterized by being formed into a shape. 2. A screw having a cross-shaped drive groove formed on a screw head, wherein a cylindrical recess is formed at an intersection position of an arc-shaped bottom surface of the drive groove. Torque screw. 3. A drive tool for use in a screw in which the tip of the tip is formed linearly and the drive groove of the screw head is linear.
A drive tool characterized in that a rectangular parallelepiped projection is formed at a central position of the tip of the tip, and outer wall surfaces before and after the projection are formed flush with outer wall surfaces before and after the tip. 4. A drive tool for use in a screw having a cross-shaped cross section and a screw head having a cross-shaped drive groove,
A drive tool characterized in that a cylindrical protrusion is formed at the intersection of the fitting blades of the tips.