JPS649491B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotation control device, and more particularly to a rotation control device configured such that rotation torque can be freely set.

As previously disclosed in Japanese Patent Publication No. 55-27970, the present applicant has disclosed a rotation control device configured to be able to rotate with a predetermined torque. Although this rotation control device was excellent, in order to realize this rotation control device, the dimensional accuracy of each part, especially the dimensional accuracy of the fitting part between the shaft part and the annular part, had to be extremely high. Unless it was maintained, it would be difficult to achieve the intended purpose.

The present invention is capable of rotating with a predetermined torque without having to maintain very high dimensional accuracy between the shaft component and the annular component, and also allows the rotation torque to be freely set. It is an object of the present invention to provide a rotation control device having the following configuration.

Hereinafter, details of the present invention will be explained based on embodiments shown in the drawings.

FIG. 1 and subsequent figures are for explaining one embodiment of the present invention, and the embodiment shown in the figures is shown as an example applied to a mop gripping tool.

In the figure, reference numeral 1 denotes a mop gripping stand, which in the embodiment shown in the figure has an oval shape, and has a velvet fastener fixed to the back side via a support frame 1a. It is configured such that a mop (not shown) can be detachably attached via 1b or the like. A pair of shaft bearings 2, 2 are provided upwardly protruding from the left and right edges of the central portion of the mop gripping base 1 at opposing positions. Through holes 2a, 2a are formed on the same axis at opposing positions of the bearing parts 2, 2. On the inner end side of these through holes 2a, 2a, there is a small diameter portion 2 with a diameter that is one step smaller.
b and 2b are formed respectively. A cutout portion 2c is formed at the lower end of the small diameter portion 2b on the shaft bearing portion 2 side of one of the small diameter portions 2b, 2b.

On the other hand, what is indicated by the reference numeral 3 is an annular part, and this annular part 3 has a cylindrical part 4 at its lower end with a length approximately equal to the distance between the shaft bearing parts 2, 2, and a central part of this cylindrical part 4. A through hole 4a is formed. Continuing with this through hole 4a, grooves 4b each having a semicircular cross section are formed in the four corners of the through hole 4a in the cylindrical portion 4.
It is formed along the axial direction of. The grooves 4b are arranged in a square shape, and are connected to a handle (not shown) on the outer peripheral surface of the cylindrical portion 4 in a state perpendicular to a straight line connecting a pair of adjacent grooves 4b. A protrusion 5 is provided in a protruding manner.

Reference numeral 6 indicates a shaft component, and this shaft component 6 is formed in a cylindrical shape, and a flange 7 having a diameter larger than the diameter of the through hole 4a of the annular component 3 is formed at one end thereof. This flange 7
A groove 7a is formed on the outer surface of the flange 7, in which a coin or the like can be fitted, for example. In the cylindrical portion of the shaft component 6, several parallel annular grooves 6a are formed at predetermined intervals perpendicular to the axial direction, but the outer diameter of the shaft component 6 excluding the annular grooves 6a is is the through hole 4a of the annular part 3
are formed almost identically. Further, a tapered surface 6b is formed over the entire circumference on the inner circumferential surface of the side edge of the shaft component 6 opposite to the flange 7, and the shaft component A plurality of notches 6c are formed along the axial direction of 6 and at equal angular intervals in the circumferential direction.

Further, a female threaded portion 6d is formed along the axial direction on the inner bottom surface of the cylindrical portion of the shaft component 6, and a female screw portion 6d is formed on the base portion of the cylindrical portion on the flange 7 side to fit into the small diameter portion 2b of the shaft bearing portion 2. A matching protrusion 6e is formed. Therefore, when the shaft component 6 is fitted into the small diameter portion 2b with the protrusion 6e fitted into the notch 2c of the small diameter portion 2b, the shaft component 6 cannot rotate. become unable.

On the other hand, the reference numeral 8 indicates a set screw. A straight part 8b having almost the same diameter as the through hole 4a of the annular part 3 is formed on the inside over a short distance, and a tapered surface 8c is formed from this straight part 8b toward the tip side. There is. The inclination angle of this tapered surface 8c is
Tapered surface 6b formed at the end of the shaft component 6
is the same as the angle of inclination of However, the tapered surface 8c
The diameter on the large diameter side is larger than the diameter on the outer end side of the tapered surface 6b of the shaft component 6. Further, a threaded portion 8d is formed at the tip of the tapered surface 8c, and this threaded portion 8d is a female threaded portion 6 formed on the shaft component 6 side as shown in FIG.
d. A groove 8e is formed on the outer surface of the head 8a of the set screw 8, into which a coin or the like can be fitted while crossing the head 8a.

Next, the assembly method and operation of this embodiment configured as above will be explained.

First, the cylindrical part 4 of the annular part 3 is placed between the bearing parts 2, 2 with the axes of the through holes 2a, 2a and the through hole 4a aligned. In this state, the protrusion 6 of the shaft component 6
It is fitted from the outside of one shaft bearing part 2 in such a way that the notch part 2c formed at the lower end of the small diameter part 2b of one shaft bearing part 2 is fitted into the notch part 2c. In this state, the set screw 8 is fitted from the outside of the other shaft bearing part 2, and the threaded part 8d thereof is screwed into the female threaded part 6d of the shaft component 6. As the threaded portion 8d and the female threaded portion 6d are screwed together, the tapered surface 8c of the set screw 8 comes into contact with the tapered surface 6b of the shaft component 6, and when the set screw 8 is screwed further, the shaft part 8c The distal end side of the component 6 is pushed out in the direction of opening the notch 6c so that its diameter increases. As a result, the outer peripheral surface of the shaft component 6 comes into contact with the inner peripheral surface of the through hole 4a of the cylindrical portion 4. Further, as the set screw 8 is threaded, the bearing parts 2, 2 also come closer and tighten the cylindrical part 4 from both sides.

A plurality of annular grooves 6a are formed on the outer peripheral surface of the shaft component 6, and a plurality of grooves 4b are formed in the through hole 4a of the cylindrical portion 4 of the annular component 3 at equal angle intervals in the circumferential direction. Therefore, the contact between the two does not cover the entire surface, and the frictional force generated between the two is relatively weakened. However, since the diameter of the shaft component 6 is expanded as the set screw 8 is threaded, the outer circumferential surface of the shaft component 6 is strongly pressed against the inner circumferential surface of the through hole 4a, and the shaft bearing portions 2, 2 Since the cylindrical portion 4 is pressed from both sides, the frictional force between the two increases. Therefore, by adjusting the tightening force of the set screw 8, the rotational torque between the shaft component 6 and the cylindrical portion 4 can be adjusted, and the degree of rotation desired by the user can be adjusted. Torque can be set freely.

In this way, by adjusting the frictional resistance between the annular part 3 and the shaft part 6, the rotation torque can be freely set, so for example, when used in a mop gripping tool, etc. Even in this case, the angle between the mop handle and the mop gripping base 1 can be maintained at a predetermined angle, and cleaning work can be continued without the mop gripping base 1 fluctuating.

In the present invention, the outer diameter of the shaft component 6 is set by the set screw 8.
Since it is configured such that it can be freely adjusted by adjusting the dimensional accuracy of the shaft component 6 and the through hole 4a of the cylindrical portion 4, it is not necessary to have very high dimensional accuracy. This has the effect that manufacturing is extremely easy and assembly work is also extremely easy.

As is clear from the above description, according to the present invention, in a rotation control device consisting of a shaft component and an annular component, the outer diameter of the shaft component is changed by a set screw that attaches the shaft component to the shaft bearing side. Since it is configured so that the frictional resistance between the part and the annular part can be adjusted, the rotation torque of the annular part can be freely set by adjusting the set screw, and the rotation torque of the annular part can be set freely by adjusting the set screw. Therefore, since the outer diameter of the shaft component can be adjusted, the dimensional accuracy of the outer diameter of the shaft component and the inner diameter of the through hole of the annular component does not require very high dimensional accuracy, making it easier to manufacture. Excellent effects include greatly expanding the degree of freedom in manufacturing, making manufacturing and assembly extremely easy, and making quality control easier as there is less need for high precision during the production process. There is.

[Brief explanation of drawings]

The figure explains one embodiment of the present invention.
The figure is a perspective view of the appearance when applied to the motu gripping tool.
2 is a sectional view taken along the line A--A in FIG. 1, FIG. 3 is a longitudinal sectional side view showing the mop in an exploded state, FIG. 4 is an exploded perspective view, and FIG. 5 is a perspective view of the mop gripping base. 1...Mop gripping base, 2...Shaft bearing part, 2a...
Through hole, 2b...small diameter part, 2c... notch, 3...
...Annular part, 4...Cylindrical part, 4a...Through hole, 4b
...Groove, 6...Shaft part, 6a...Annular groove, 6b...
...Tapered surface, 6c...Notch, 6d...Female thread, 6e...Protrusion, 7...Flange, 7a, 8e
...Groove, 8...Set screw, 8c...Tapered surface,
8d...screw part.

Claims (1)

[Claims] 1. An annular part having a protrusion for connecting a mop handle or the like on the outer peripheral surface that is fitted between a pair of shaft bearings protruding from the top surface of the mop support base, and a cylindrical part having a through hole in the center; A shaft component having a cylindrical portion with an open end that is fitted into the through hole of the annular component from one side and is supported by a shaft bearing portion so as not to rotate with respect to the annular component; and a set screw screwed into the shaft part from the other side through the through hole of the cylindrical part, and the inner circumferential wall of the through hole of the annular part has axial screws arranged at equal angular intervals in the circumferential direction. In the rotation control device, a plurality of grooves are formed parallel to the cylindrical portion of the shaft component, and a plurality of annular grooves are formed on the outer peripheral surface of the cylindrical portion of the shaft component in a state orthogonal to the axial direction. A tapered surface that becomes larger in diameter toward the outside is formed on the inner peripheral surface of the tip.
A plurality of notches are formed inward from the tip of the cylindrical part and at equal angular intervals in the circumferential direction, and a female thread is formed in the inner bottom surface of the cylindrical part along the axial direction. A flange having a larger diameter than the through hole of the annular component is formed at the end, and the set screw has a head having a larger diameter than the through hole of the annular component at one end, and a proximal end is formed on the inner side of the head. is approximately the same as the diameter of the through hole of the annular component, and is formed with a tapered surface having the same inclination angle as the tapered surface of the shaft component toward the tip, and the tip of this tapered surface has a cylindrical surface of the shaft component. A rotation control device characterized in that a threaded portion is formed to be screwed into a female thread formed on an inner bottom surface of the rotation control device.