JP3127483U - Tightening screw hole structure for set screw members - Google Patents

Abstract

PROBLEM TO BE SOLVED: To temporarily hold and hold each fastening blade at the tip of an attachment tool with respect to a fitting hole portion having each screw hole structure.
SOLUTION: The fitting hole portion 15 serving as a tightening screw hole is formed into a wall surface with the same inner diameter around the screw shaft core 16 of the set screw member 11, and then the wall surface is divided into three at substantially equal intervals. Each inner wall surface portion 17 is divided, and from each inner wall surface portion 17, each pressure receiving projecting surface 19 that becomes a tightening pressure receiving surface in a radial direction with respect to the screw shaft core 16 is formed. After extending the inner end edge of the surface 17 to each corresponding inner wall surface portion 17 as a non-clamping pressure receiving corresponding surface to form each non-pressure receiving coupling surface 20, at least each pressure receiving projection surface 19 and each non-pressure receiving coupling surface 20 are formed. The screw shaft core 16 is arranged in a conical surface shape having a diameter slightly increased toward the screw head.
[Selection] Figure 1

Description

  The present invention relates to a tightening screw hole structure that is formed in a recessed shape in a screw head as a set screw member.

  More specifically, a set screw member having a required length dimension, i.e., after cutting a cutting screw portion at a screw tip, a series of required pitches from the cutting screw portion at the screw tip to the peripheral surface of the screw body portion. Improvement of set screw member formed by screwing in the tightening screw part and recessing the fitting hole part that becomes the screw hole for tightening on the top surface of the screw head to the required depth, especially fitting that becomes the screw hole for tightening It relates to the improvement of the joint hole.

  Conventionally, a so-called plus screw (+ screw) has been established as a basic structure for the structure of a screw hole structure in which a recess is formed in this type of set screw member, that is, a configuration of a fitting hole portion to be a screw hole for tightening. Each form configuration is well known.

  Each of these already submitted screw hole structures for tightening, that is, a set screw member having a fitting hole portion, is generally temporarily attached to the tip of a tightening tool that becomes an electric tool, a so-called driver tool, and is held. For example, it is a common form to be used almost as a single attachment means in the details of the construction.

  However, in the conventional fitting hole portion of this type of screw hole structure, it is assumed that the set screw member itself is temporarily fitted and held at the tip of the tightening tool, and the temporary fitting holding is performed, Tightening that gives each clamping blade at the tip of the driver tool a pressure contact with each pressure receiving projecting surface of the fitting hole that is the target pressure receiving pressure, and that gives the clamping tool a holding action in this contact pressure state Since it is obtained from the torque, the consistency of temporarily fitting each fastening blade at the tip of the mounting tool to the fitting hole portion that becomes each screw hole structure is extremely poor, and it is difficult to hold in the temporarily fitted state, etc. There was an inconvenience.

  The present invention was made in order to improve each of the problems in the conventional screw hole structure, and the object of the present invention is to improve the configuration of the fitting hole portion to be each screw hole and to provide a mounting tool. It is an object of the present invention to provide a screw hole structure for tightening in a set screw member of this type, which can reliably and effectively hold the fitting.

The tightening screw hole structure in the set screw member according to the present invention is formed by cutting a notched screw portion at a screw tip and tightening at a series of required pitches from the notch screw portion at the screw tip to the circumferential surface of the screw body portion. In the configuration of the set screw member which is screwed into the screw part and formed by recessing the fitting hole part which becomes a screw hole for tightening on the top surface of the screw head to the required depth,
For the fitting hole portion to be the tightening screw hole,
The inner surface of the set screw member is formed in the shape of a wall with the same inner diameter around the screw shaft, and the inner wall is divided into three planes within a substantially equiangular interval. From the screw shaft core, each pressure receiving projecting surface that becomes a tightening pressure receiving surface in a radial direction is formed, and the inner end edge of each pressure receiving projecting surface is the non-tightening pressure receiving corresponding surface. The inner wall surfaces are extendedly coupled to form the same number of non-pressure-receiving coupling surfaces, and at least the pressure-receiving projection surfaces and the non-pressure-receiving coupling surfaces are slightly enlarged toward the screw head side with respect to the screw shaft core. It is characterized by being arranged in a conical surface.

  According to the tightening screw hole structure in the set screw member according to the present invention, by using the tightening tool corresponding to the fitting hole portion to be the tightening screw hole, the set screw member is used to form the set screw member. The fitting hole can be temporarily fitted and held.

(Example)
Hereinafter, an embodiment of a screw hole structure for fastening in a set screw member according to the present invention and an example of a tightening tool (driver) used for fastening the set screw member will be described in detail with reference to the accompanying drawings. Explained.

  As shown in FIGS. 1 and 2, the set screw member 11 according to the present embodiment has a cutting screw portion 12 at the tip of the screw, and then extends from the cutting screw portion 12 at the tip of the screw to the circumferential surface of the screw barrel portion. The tightening screw portion 13 is threaded into a series of required pitches, and a fitting hole portion 15 serving as a tightening screw hole is formed in the head top surface 14a of the screw head 14 so as to be recessed to a required depth.

  Thus, the fitting hole 15 serving as the tightening screw hole is formed on the wall surface inner surface 18 having the same inner diameter around the screw shaft core 16 of the set screw member 11, and On the other hand, each of the inner wall surface portions 17, 17, 17 is divided into three parts within a substantially equiangular interval.

  Further, from each inner wall surface portion 17, each pressure receiving projecting surface 19 serving as a tightening pressure receiving surface 19 is formed in a radial direction with respect to the screw shaft core 16, and an inner end edge 19 a of each pressure receiving projecting surface 19 is formed. Are connected to the corresponding inner wall surface portions 17 as the corresponding non-clamping pressure receiving surfaces to form the same number of the non-pressure receiving coupling surfaces 20, and the at least each pressure receiving projecting surface 19 and each non-pressure receiving coupling surface 20 are connected to each other. With respect to the screw shaft core 16, it is arranged in a conical surface shape whose diameter is slightly expanded toward the screw head 14 side.

  Next, as shown in FIGS. 3 and 4, the tightening tool 41 according to an example for fastening the set screw member 11 is a publicly known one except for the tightening portion 42 at the tip, and there is no problem. The tightening portion 42 at the tip is formed corresponding to the configuration of the fitting hole portion 15 serving as the tightening screw hole, and coincides with each of the pressure receiving projecting surfaces 19 to correspond to each of the pressure receiving projecting surfaces 19. There are the same number of fastening blades 43 on which three fastening pressure surfaces 44 that obtain a fastening action by pressing are arranged.

  Accordingly, in order to temporarily fit and hold the fitting hole 15 of the set screw member 11 in each tightening blade 43 of the tightening tool 41, each tightening blade formed in the tightening portion 42 of the tightening tool 41. It is only necessary to fit the fitting hole 15 to the portion 43, and the fitting surfaces of these both are formed in a specific conical surface shape as described above. Not only is it very easy, but in the fitted state, the corresponding pressure receiving projecting surfaces 19 of the fitting hole 15 are closely fitted in the three tightening pressure surfaces 44 of the tightening tool 41 so that they can be easily fitted. It will be disguised.

  That is, in the present embodiment as described above, the fitting hole 15 is formed on the wall-like inner surface 18 with the same inner diameter around the screw shaft core 16, and each inner wall divided into three on the wall-like inner surface 18. After the surface portion 17 is formed, each inner wall surface portion 17 is formed with each pressure receiving projecting surface 19 to be a pressure receiving corresponding surface in the radial direction on the screw shaft core 16, and each pressure receiving projecting surface 19 is not It is combined with each corresponding inner wall surface portion 17 as a tightening pressure receiving corresponding surface to form each non-pressure receiving coupling surface 20, and at least each pressure receiving projecting surface 19 and each non-pressure receiving coupling surface 20 is a conical surface that slightly expands toward the screw head 14 side. Since the screw hole structure for mounting the set screw member 11 is arranged in a shape, the following advantages are obtained.

That is,
(1) Excellent consistency for fitting each fastening blade at the tip of the tightening tool to the fitting hole part that has each screw hole structure,
(2) Temporary fitting and holding of the tightening tool in the mating hole is reliable and easy, which increases the service life of the tightening tool.
(3) The structure of the fitting hole, and thus the production of the set screw member itself is simplified, and the cracking of the screw head that constitutes the fitting hole is less likely to occur,
(4) Since there is no blurring when tightening the fitting hole with the tightening tool, the resulting workability can be improved.
(5) The weight of the set screw member itself can be reduced by the shape of the fitting hole.
Etc.

  As described above, in the embodiment of the present invention, a screw hole is formed in the screw head. However, the screw head is not limited to a flat head shape or a flat head shape, and may be a round head shape. Also, the tightening tool may not necessarily correspond to the fitting hole.

It is a plane enlarged view which shows the screw head which formed the fitting hole part in the set screw member which makes flat head shape which applied one Example of this invention. It is sectional drawing which cuts and shows the center part of the setscrew member same as the above. It is the whole side view and base part side end view which show an example of the clamping tool with respect to a setscrew member same as the above. It is the end view and side view which expand and show the front end side of each fastening blade | wing part in the same fastening tool.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Set screw member 12 Cutting screw part 13 Clamping screw part 14 Screw head part 14a Head top surface 15 of screw head 15 Fitting hole part 16 Screw shaft core 17 Inner wall surface part 18 Wall-shaped inner surface 19 Pressure receiving protrusion surface 19a Pressure receiving protrusion surface Inner edge 20 Non-pressure receiving coupling surface 41 Tightening tool 42 Tightening portion 43 Tightening blade 44 Tightening pressure surface

Claims (1)

After cutting the cutting screw part at the screw tip, it is screwed into a tightening screw part with a series of required pitches from the cutting screw part at the screw tip to the peripheral surface of the screw body, and on the top surface of the screw head. In the configuration of the set screw member formed by recessing the fitting hole portion to be the screw hole for tightening to the required depth,
For the fitting hole portion to be the tightening screw hole,
The inner surface of the set screw member is formed in the shape of a wall surface with the same inner diameter around the screw axis, and the inner wall surface portion is divided into three planes within a substantially equiangular interval. From the above, each pressure receiving projecting surface that becomes a tightening pressure receiving surface in a radial direction with respect to the screw shaft core is formed, and the inner end edge side of each pressure receiving projecting surface is the non-pressure receiving corresponding surface. After extending and coupling to each inner wall surface to form the same number of non-pressure receiving coupling surfaces, the at least each pressure receiving projecting surface and each non-pressure receiving coupling surface are slightly expanded toward the screw head side with respect to the screw shaft core. A screw hole structure for tightening in a set screw member, characterized by being arranged in a conical surface having a diameter.

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