JP3036344B2 - Coupling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel coupling device which cannot be easily unscrewed and removed with a normal tool such as a screwdriver.

[0002]

2. Description of the Related Art A screw in a conventional coupling device has a plus or minus groove formed in a head of a screw rod to lock a tip of a driver. Therefore, if a screwdriver or the like is used, a screw that is screwed in to attach a component or the like is easily removed intentionally or by mischief using the locking groove as a clue.

[0003]

The coupling device of the present invention eliminates the locking groove for the driver of the screw rod head, and allows the screw once screwed in to be easily replaced by ordinary tools such as an ordinary driver. It has been proposed for the purpose of making it impossible to remove.

[0004]

Means for Solving the Problems To achieve the above object,
Because, the coupling device of this invention forms the head of a thin cylindrical body shape with a large diameter than the diameter of the threaded rod to the proximal end of the threaded rod having a threaded portion on the tip side, the surface of the head smooth flat surface and a screw formed with a curved, cylindrical portion of the one end shallower other end deep plurality of retaining grooves on the inner side is formed along the circumference, and trochanter group or al housed movably each holding groove Naru one way clutch
And one-way screw head
It is characterized in that it can be fitted to a clutch .

[0005]

[Action] in the coupling device according to the inventions, the head of the screw
Parts are formed in a thin cylindrical body shape, it is returned or screw screwed by seed Ji driving tool developed by the inventors of this application.

[0006] its roots Ji driving tool (hereinafter referred to as "driver") is as shown in FIGS. 3, 4 and 5, so that it can be fitted detachably to the head of the screw in the axial direction it ,
A receiving part is provided at the tip of the screwdriver tool body; the receiving part comprises a one-way clutch having a cylindrical part and a plurality of rotators movably mounted inside the cylindrical part; The one end is formed in a holding groove formed on the inside of the shape portion along the circumferential direction, the one end being shallow and the other being deep; the head of the screw when the head of the screw is fitted into the receiving portion of the tool body. In contrast, the relative rotational movement of the cylindrical portion, which comes into contact via the trochanter, with respect to the screw head is selectively restricted by rotation to one side.

[0007] To combine the at least two articles in the coupling device of the present invention is a fitting state between the receiving portion of the screw head and driver, while pressing the object to do screwed a threaded rod, wherein What is necessary is just to rotate the receiving part in the screwing direction of the screw rod by the driving means or by hand.

In this case, the rolling operation of each trochanter in the holding groove formed inside the cylindrical portion is restrained by friction at one end side of each holding groove, so that a gap between the cylindrical portion and the screw head is formed. The screw rod is selectively and relatively immovable relative to the cylindrical portion through the wedge action of the trochanter. Through its action, the screw rod is screwed into the object to be screwed, and the articles are connected to each other.

[0009] It should be noted that, after the tightening of the screws may be pulled out of the receiving portion of the driver from the screw head. At the time of disengagement, as shown in FIG. 5, the receiving portion of the tool reduces the engagement of the trochanter into the screw head unless the rotational force in the direction of arrow P is applied, and the fitting to the screw head is reduced. Easily leaves the jammed state.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings. FIGS. 1 and 6 show a screw in a first embodiment and a second embodiment of the coupling device of the present invention, respectively.

In these figures, reference numeral 1 denotes a threaded rod of a screw, the distal end of which has a threaded portion 11 over the entire length or partially, and the proximal end of which has a diameter larger than the diameter of the threaded rod 1. A thin cylindrical head 12 is provided integrally. The cylindrical head 12 is formed by a smooth flat surface on the upper and lower bottom surfaces and a smooth cylindrical surface on the body surface.

In other words, the outer surface of the head 12 is provided with a plus groove, a minus groove, a square hole, a projection, and other tool engaging portions to which the tips of ordinary drivers and tools are engaged. Not. And especially the head 12 of the screw rod 1
Has a perfect circular cross section.

Therefore, the screw according to the present invention is shown in FIGS.
And it is only screwed into or out by Nane Ji driving tool (driver) as shown in FIG.

[0014] with respect to FIGS. 3 to 5 the head 12 of the threaded rod 1,
The receiving portion 21 provided at the distal end of the main body 2 of the driver shows a state in which is fitted detachably in the axial direction of the threaded rod 1.

[0015] Figure 3 and the receiving portion 21 of the driver of an example shown in FIG. 5, fixedly or removably attached to the rotating output shaft 22 of the driving means such as a motor in the tool body 2 (not shown) is there.

The purpose of detachably attaching the receiving portion 21 to the rotary output shaft 22 is to replace the receiving portion 21. Reference numeral 23 denotes an energizing code, and 24 denotes a switch button for energizing the driving means.

The receiving portion 21 is, as shown in FIG.
It is constituted by a one-way clutch having a cylindrical portion 25 and a plurality of rollers or spheres or other rotators 26 movably mounted inside the cylindrical portion 25.

Each trochanter 26 is formed in a holding groove 27 formed on the inside of the cylindrical portion 25 along the circumferential direction and having one end (left side in FIG. 5) shallow and the other end (right side in FIG. 5) deep. Is housed in

[0019] Then, when fitted in the receiving portion 21 of the head 12 Gad driver of threaded rod 1, the rotor with respect to the head 12 26
The relative rotational movement of the cylindrical portion 25 with respect to the threaded rod 1 contacting through is selectively restricted by the difference in the rotational direction.

The screw head 12 and the receiving portion 21 (the cylindrical portion 2)
In fitting state of 5), a threaded portion 11 at the tip of the threaded rod 1, through the insertion hole 34 provided in the component 33 such as threaded
When the receiving portion 21 is rotated by the driving means in the screwing direction A of the screw rod 1 (the direction of arrow P in FIG. 5) while being pressed against the object 31, the holding groove 27 formed in the cylindrical portion 25 is formed. The rolling of each trochanter 26 is restricted by friction at one end side (left side in FIG. 5) of each holding groove 27.

Therefore, the rotation between the cylindrical portion 25 and the screw head 12 via the trochanter 26 cannot be selectively and relatively disabled. That is, if the cylindrical portion 25 is rotated in the direction of arrow P in FIG. 5, the screw head 12 is also rotated in the same direction (screw-in direction A) via the trochanter 26 immobilized by friction. Therefore, the screw portion 11 at the tip of the screw rod 1 is screwed into the corresponding female screw portion 32 or the like of the screwing object 31 through the action.

The corresponding female screw portion 32 of the screwing object 31 may be formed in advance, or as shown in the second embodiment of FIG. 6, the screwing portion 11 of the screw rod 1 is sharp and In the case where the screw 31 is screwed into the object 31 while forming a screw hole, the corresponding female screw portion (32) of the screwed object 31 need not be formed in advance.

In FIG. 5, reference numeral 28 is provided between each trochanter 26 and the stopper 28a as necessary, and each trochanter 2
A compression spring biasing the holding groove 6 toward one end of the holding groove 27 (the left side in the figure), 29 is a cylindrical holding plate having a through hole that allows each trochanter 26 to slightly project inward. .

[0024] In another example of the shown to drivers 4 and 5, the tool body 2 has a handle 20 at its proximal end, the handle 20 is operated by hand with the tool body 2 .

Since this embodiment is of a manual type, no driving means is provided in the tool body 2 and a fixed connecting member 22a is provided between the tool body 2 and the receiving portion 21. However, between the connecting member 22a and the tool main body 2 or the receiving portion 21, it can be detachably attached for the purpose of replacing the receiving portion 21.

[0026] The driver of FIG. 4, in the fitted state between the receiving portion 21 and the head 12 of the screw rod 1, threaded rod 1
When the handle 20 is held by hand and the receiving part 21 is rotated together with the main body 2 in the screwing direction A of the screw rod 1 (the direction of arrow P in FIG. 5) while pressing the screw part 11 of Each trochanter 2 in the holding groove 27 formed in the shape part 25
The rolling of No. 6 is restrained by friction at one end side (left side in FIG. 5) of each holding groove 27.

Accordingly, the rotation between the cylindrical portion 25 and the head 12 of the screw rod 1 via the trochanter 26 is selectively and relatively impossible.

On the other hand, when the receiving portion 21 is manually rotated by the handle 20 in the direction in which the screw rod 1 is unscrewed (the direction of arrow Q in FIG. 5), each trochanter 26 is connected to the other end in each holding groove 27. By displacing to the side (right side in the figure), the rolling becomes free, and the cylindrical portion 25 can idle with respect to the screw rod 1.

By the reciprocating operation of the receiving portion 21 in the left and right directions by the handle 20, the screw portion 11 at the tip of the screw rod 1 is easily screwed into the screwed object 31 without releasing the hand from the handle 20. Becomes possible.

After the screw rod 1 has been screwed in, if the tool body 2 is displaced in a direction to pull the tool body 2 away from the screwing target 31, the receiving portion 21 is not given a rotational force in the direction of arrow P in FIG. As long as the head 12 of the screw rod 1 by the trochanter 26
Is easily removed from the fitting state with respect to the head 12.

Then, as shown in FIG. 2, for example, the connection between at least two articles 31, 33 is achieved by the connecting device of the present invention.

Further, if the state shown in FIG. 2 unscrew the threaded rod 1, the use of drivers that interference direction to the screw head 12 is provided with a reverse of the receiving portion 21, threaded rod 1 is easily removed Can be.

[0033]

According to the coupling device of the present invention described above,
The kicking screw head, the locking groove or the like is not provided a normal driver or tooling is engaged, after the screwed end of said screw, thereby fastening the normal drivers and tooling Is difficult to be performed, and there is an effect that it is not removed intentionally or mischievously.

[Brief description of the drawings]

FIG. 1 is a side view showing a screw in a first embodiment of a coupling device according to the present invention.

FIG. 2 is a partial vertical sectional side view showing a state after the screwing.

FIG. 3 is a side view of the drivers that put in a state of fitting the screw of Figure 1.

Figure 4 is a side view of another de la <br/> driver in a state in which fitting the screw of Figure 1.

FIG. 5 is a common enlarged cross-sectional view taken along line VV in FIGS. 3 and 4;

FIG. 6 is a side view showing a screw in a second embodiment of the coupling device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Screw rod 11 Screw part 12 Head25 tubular part 26 trochanter 27 Holding groove

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-2-97708 (JP, A) JP-A 64-57408 (JP, U) JP-A 2-27014 (JP, U) JP-A 59- 34646 (JP, U) JP 49-38780 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16B 23/00

Claims (1)

(57) [Claims] 1. A cylindrical head having a diameter larger than the diameter of the screw rod is formed at the base end of the screw rod having a screw portion on the distal end side, and the surface of the head is formed with a smooth flat surface and a curved surface . screw
When one end is shallower other end on the inner side is provided with a deep plurality of cylindrical portions forming a holding groove along the circumference, and trochanter group or Ranaru one-way clutch housed in moveable to each holding groove Do
A coupling device comprising a screwdriver, wherein a screw head can be fitted to a one-way clutch .