JP2014097778A - Caster with brake function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a caster with a brake function whose rolling function is controlled and which is attached to, especially, furniture, office appliances, medical equipment in hospital, medical beds, walkers for rehabilitation and so on, responses weakly to small vibration of earthquake, and can roll with the brake function to large vibration.SOLUTION: A brake member 6 for braking rotation of a wheel 4 supported by a shaft 5 whose both ends are fixed to frames 2 is interposed between the wheel and the shaft. Following to rotation of a dial 3 disposed on a side face of one frame so as to freely rotate, the brake member moves to adjust friction between the wheel and the shaft.

Description

  The present invention relates to a caster with a braking mechanism, and in particular, can control the rolling function of casters attached to furniture, office equipment, hospital medical equipment, medical beds, rehabilitation walker, etc. The present invention relates to a caster with a braking function, which is weak in response to small swings and can roll while exhibiting a braking function against large swings.

A caster without a braking mechanism has good responsiveness to a small shake such as an earthquake, and sometimes rotation is difficult to be settled.
For this reason, an apparatus for providing a certain degree of braking function to the casters has been proposed.

  JP 2009-67110 A

  In the caster with a brake to be described above, a roller is pressed against the wheel to control the rotation of the wheel, so that a part protruding from the upper part or the side surface of the caster has to be attached.

  For this reason, it is difficult to operate with a large number of parts, and the portion protruding from the caster body may be dangerous.

  The present invention has been made as a result of intensive studies to solve the above-described problems, and provides a caster with a braking function that can exhibit a damping function against a large earthquake shake.

  A braking member for braking the rotation of a wheel pivotally supported by a shaft fixed to the frame at both ends is interposed between the wheel and the shaft, and is disposed rotatably on one side of the frame. The brake member moves with the rotation of the dial so that the friction between the wheel and the shaft can be adjusted, and the inner screw of the push member that rotates integrally with the rotation of the dial and the brake member The screw provided on the outside of the tip is meshed, and the brake member is moved with the rotation of the dial, and a rotatable dial is arranged on both sides of the frame. The push member that is engaged with the threaded portion by rotation of the dial is configured to be able to adjust the friction that applies finger pressure to the side surface of the wheel. The structure is such that friction can be adjusted by pressing the wheel through a shear. The rotation is adjusted by the degree of screwing of the nut, and a cone is integrally formed at the lower end of the housing fixing shaft, and the frictional force between the contact portion of the cone and the top plate A caster with a braking function is provided in which the rotation of the housing fixed shaft is controlled.

  According to the caster with a braking function of the present invention, since the rotation of the wheel is braked by the frictional force, the wheel does not roll indefinitely for small vibrations and shakes, and for large shakes such as earthquakes. A caster in which the wheel rotates slowly while exhibiting the braking function can be provided, so that it does not roll and collide with other devices indefinitely.

  It is a side view of the caster with a braking function according to the present invention.   It is sectional drawing of 1st Example of FIG.   It is sectional drawing of 1st Example of FIG.   It is an expanded sectional view of FIG.   It is an expanded sectional view of FIG.   It is sectional drawing of 2nd Example of FIG.   It is sectional drawing of 2nd Example of FIG.   FIG. 4 is a sectional view of the third embodiment of FIG. 1.   FIG. 4 is a sectional view of the third embodiment of FIG. 1.   It is a side view of the housing individual shaft of the caster with a braking function according to the present invention.   It is an expanded sectional view of a housing fixed shaft.   It is an expanded sectional view of a housing fixed shaft.   It is a side view of the housing fixed shaft of the caster with a braking function according to the present invention.   It is a partial expanded sectional view of FIG.   It is a side view of the housing fixed shaft of the caster with a braking function according to the present invention.   It is a partial expanded sectional view of FIG.   FIG. 4 is a cross-sectional view of the braking member of FIGS. 2 to 3.

The first embodiment shown in FIGS. 1 to 3 will be described below.
A braking member 6 for braking the rotation of the wheel 4 supported by the shaft 5 fixed at both ends to the frames 2 and 2 is interposed between the wheel 4 and the shaft 5. The brake member 6 moves in accordance with the rotation of the dial 3 that is rotatably arranged on the side surface, and the friction between the wheel 4 and the shaft 5 can be adjusted.

  That is, in the state shown in FIG. 2, since there is a gap 41 between the wheel 4 and the braking member 6, the frictional force does not act strongly against the rotation of the wheel 4, but as shown in FIG. The braking member 6 is moved by the movement, and the gap 41 disappears and friction is generated between the wheel 4 and the braking member 6.

  The braking member 6 is made of elastic plastic, and has a slit 61 in the vertical direction as shown in FIG.

The second embodiment shown in FIGS. 4 to 5 will be described below.
The shaft 5 having both ends fixed to the frames 2 and 2 is inserted into the taper member 62, and the inner screw of the push member 8 that rotates integrally with the rotation of the dial 3 and the screw provided outside the tip of the taper member 62. The taper member 62 moves against the stop 7 by the rotation of the dial 3, and the gap portion 41 disappears and friction is generated between the wheel 4 and the taper member 62.

A third embodiment shown in FIGS. 6 to 7 will be described below.
The rotatable dials 3 and 3 are arranged on both sides of the frames 2 and 2, and the push members 8 and 8 that mesh with the threaded portion 81 by the rotation of the dials 3 and 3 are respectively side surfaces of the wheel 4. It is possible to adjust the friction for pressing.

A fourth embodiment shown in FIGS. 8 to 9 will be described below.
In the fourth embodiment, spring washers 9 and 9 are further interposed in the third embodiment drawings shown in FIGS.

  In other words, the two push members 8 and 8 that mesh with the threaded portion 81 by rotating the dials 3 and 3 can adjust the friction by pressing the side surfaces of the wheels 4 via the spring washers 9, respectively. Therefore, the wheel 4 rotates elastically.

The fifth embodiment shown in FIGS. 10 to 12 will be described below.
The housing fixing shaft 10 inserted and fixed in the top plate 1 is fixed by a housing fixing shaft head 16 and a nut 12.

  The rotation of the housing fixing shaft 10 inserted through the top plate and the braking member 13 is adjusted by the screwing degree of the nut 12 screwed into the threaded portion 11 formed at the tip of the braking member 13.

  If the tightening of the nut 12 is increased, the frictional force between the braking member 13 and the top plate 1 is increased and the rotation of the housing fixing shaft 10 is controlled, so that the caster body does not rotate lightly.

A sixth embodiment shown in FIGS. 13 to 14 will be described below.
The housing fixing shaft 10 inserted and fixed in the top plate 1 is fixed by a housing fixing shaft head 16 and a nut 12.

  The nut 12 is screwed into the screwing portion 14 via the elastic washer 15, and the rotation of the housing fixing shaft 10 is controlled by the frictional force of the elastic washer 15.

The seventh embodiment shown in FIGS. 15 to 16 will be described below.
The housing fixing shaft 10 inserted and fixed in the top plate 1 is fixed by a housing fixing shaft head 16 and a conical portion 17.

  The conical portion 17 is formed integrally with the housing fixing shaft 10 and is configured such that the rotation of the housing fixing shaft 10 is controlled by the frictional force of the contact portion between the conical portion 17 and the top plate 1. Yes.

  However, when the rotation of the wheel 4 is restricted by the operation of the dial 3, the contact portion 18 of the conical portion 17 rotates before the rotation of the wheel 4 in the initial fine movement of the earthquake.

DESCRIPTION OF SYMBOLS 1 Top plate 2 Frame 3 Dial 4 Wheel 41 Gap part 5 Shaft 6 Braking member 61 Slit 62 Tapered part 7 Stopper 8 Push member 81 Threaded part 9 Spring washer 10 Housing fixing shaft 11 Threaded part 12 Nut 13 Braking member 14 Threaded Part 15 Washer 16 Body fixed shaft head part 17 Conical part 18 Contact part

Claims (6)

  A braking member for braking the rotation of a wheel pivotally supported by a shaft fixed to the frame at both ends is interposed between the wheel and the shaft, and is disposed rotatably on one side of the frame. A caster with a braking function, characterized in that the brake member moves with the rotation of the dial to adjust the friction between the wheel and the shaft.   The inner screw of the push member that rotates integrally with the rotation of the dial meshes with the screw provided on the outer end of the brake member, and the brake member is moved as the dial rotates. The caster with a braking function according to claim 1.   A rotatable dial is arranged on both sides of the frame, and the configuration is such that both of the push members engaged with the threaded portion can adjust the friction of pressing the side surfaces of the wheels by the rotation of the dial. The caster with a braking function according to claim 1.   2. The caster with a braking function according to claim 1, wherein the push member is configured to adjust friction by pressing a wheel via a spring washer.   The housing fixed shaft inserted through the top plate and the braking member is configured such that the rotation is adjusted by the screwing degree of the nut screwed into the threaded portion formed at the tip of the braking member. The caster with a braking function according to claim 1.   2. The structure according to claim 1, wherein a cone is integrally formed at a lower end of the casing fixing shaft, and the rotation of the casing fixing shaft is controlled by a frictional force with a top plate of a contact portion of the cone. Caster with braking function.

Images