JP4965386B2 - Tilt hinge with torque difference - Google Patents

Description

  The present invention relates to a tilt hinge having a torque difference.

Conventionally, when opening the toilet seat and toilet lid in the direction of opening from the fully closed state, when the toilet seat and toilet lid are lifted to a certain angle, torque in the opening direction slightly larger than the gravity of the toilet seat and toilet lid is generated from there However, when closing the toilet seat and the toilet lid in the direction to close the toilet seat and the toilet lid from the open state, the torque in the opening direction acting on the toilet seat and the toilet lid is strong, so the toilet seat and Convenience was not good because I had to close it while holding the toilet lid.
Utility Model Registration No. 3118163

The present invention provides a difference in torque between the opening operation and the closing operation of the toilet seat and toilet lid, and when the force is applied in the closing direction, particularly when starting the closing operation, the operation automatically and gently thereafter. It is not necessary to press and close the toilet seat and the toilet lid, and it is possible to provide a tilt hinge having a torque difference that reduces the labor for opening and closing the toilet seat and the toilet lid, and has a convenient torque difference, particularly for the physically handicapped. Let it be an issue.

A tilt hinge having a torque difference according to the present invention has a bottomed cylindrical cam case fixed to one member of a first member and a second member that are relatively opened and closed, and is fitted to the cam case so as to be relatively rotatable. A bottomed cylindrical spring case fixed to the other member of the first member and the second member so that the cam case and the cam case are penetrated by the same rotation axis of the cam case and the spring case; A hinge shaft having a rotation-preventing flange that is connected to the spring case, a slider that is inserted through the hinge shaft and is movable in the axial direction in the spring case, and is housed in a non-rotating manner; and the spring A spring member housed in the case and configured to press and urge the slider toward the cam case; and a hinge member disposed around the hinge shaft on the inner bottom surface of the cam case, and having a predetermined inclination from the first peak toward the inner bottom surface of the cam case. A first inclined surface for automatic opening operation that descends at an angle, and a flat surface continues from the lower end of the inclined surface, and the flat surface and a flat surface up to the second inclined surface that is gentler than the first inclined surface The boundary between and is a step, and when going up the slope from the second slope and returning to the second peak, it becomes a flat surface again, and the flat surface returns to the first peak. A cam integrated with a cam case having a step with respect to the surface, and a ball that is integrally formed around the hinge shaft at the tip of the slider and that slides on the cam as the cam case rotates And a spherical cam follower, and a groove is provided on a cam surface on which a ball ball as the cam follower slides. Further, even when the first member or the second member on which the cam follower slides on the first inclined surface is in an opening operation state, even if the first inclined surface shifts to a flat surface, a spring-up moment load is generated. It is characterized by having a structure in which the cam follower keeps sliding on the flat surface as it is, and reaches the edge of the second inclined surface through a step by securing 1.5 times or more of its own weight drop moment. Further, when the first member or the second member on which the cam follower slides on the second inclined surface is in the closing operation state, when the second peak is reached, due to the weight of the first member or the second member and the level difference. The shape naturally returns to the top of the first mountain. Still further, the first inclined surface on which the cam follower slides when the first member or the second member is opened is more than the second inclined surface on which the cam follower slides when the first member or the second member is closed. It is also characterized in that the torque in the opening direction in the opening operation state is made larger than the torque in the opening direction in the closing operation state by disposing it outside in the radial direction and increasing the torque radius.

The tilt hinge having a torque difference according to the present invention is such that when the toilet seat and the toilet lid are in the closed state, and when attempting to open, the toilet seat and the toilet lid are automatically in the fully opened state only by applying a light force in the opening direction. It can be rotated until it becomes. That is, since the opening force is larger than the weight of the toilet seat and the toilet lid, the toilet seat and the toilet lid are not inadvertently closed down and the opening state can be secured. In addition, when trying to close from the fully open state, only a slight force is applied in the closing direction, and the toilet seat and the toilet lid are automatically closed until the toilet seat is fully closed. Has the effect of rotating gently.
Therefore, it has the effect that a toilet seat and a toilet lid can be used comfortably without a physical fatigue for a physically handicapped person.
Moreover, it is not restricted to a toilet seat and a toilet lid, What is necessary is just to have the same use. Further, regarding the reciprocating motion of the hinge on the cam surface, the present invention can be applied to a case where the forward and return torques are desired to have different values.

  1 to 3 show an embodiment of the present invention. A toilet seat 2 and a toilet lid 1 constituting a second member of the present invention are arranged on a tilt hinge with respect to an upper surface of a western toilet 3 constituting a first member of the present invention. As shown by a virtual line in FIG. 2A, the open state opens in a vertical or near-vertical posture, and the upper surface of the western-style toilet 3 is horizontal or horizontal as shown by the solid line state in FIGS. It rotates over a closed state that closes to a posture close to.

  Further, the toilet lid 1 is vertical or vertical as shown by a virtual line in FIG. 2B with respect to the upper surface of the toilet seat 2 in a horizontal or nearly horizontal posture via a tilt hinge H ′ different from the tilt hinge H. 2b, and the closed state where the toilet seat 2 is closed horizontally or close to the horizontal position as shown by the solid line in FIG.

  First, the toilet seat 2 that constitutes the second member, as shown by the phantom line in FIG. 2A together with the toilet lid 1, is vertical or nearly perpendicular to the horizontal upper surface of the western toilet 3 that constitutes the first member. As shown in FIG. 2 (a), the tilt hinge H is an example of the tilt hinge H when it is pivoted between an open state that is open at the top and a closed state that is closed in a horizontal or nearly horizontal position on the upper surface of the western toilet 3 as shown by a solid line in FIG. This will be described below.

As shown in FIGS. 1 and 3, the Western-style toilet 3 has a pair of left and right mounting projections 4, 4 for mounting the toilet seat 2 on the rear part of the upper surface. On the other hand, the toilet seat 2 is formed in a horseshoe shape in a plan view having a size capable of covering the upper surface of the Western-style toilet bowl 3, and corresponds to the mounting projections 4 and 4 on the rear rotation base end side of the toilet seat 2. A pair of left and right bosses 5 and 5 (only one boss 5 is shown in FIG. 3) are integrally provided.

  The tilt hinge H 1 is assembled between one boss 5 of the toilet seat 2 and one mounting projection 4 of the western toilet 3. Between the other boss 5 of the toilet seat 2 and the other mounting projection 4 of the western-style toilet 3, a hinge (not shown) by a normal joint pin is incorporated.

  As shown in FIGS. 3 and 4, the tilt hinge H includes a bottomed cylindrical cam case 6 fixed to the boss 5 of the toilet seat 2, and an open end portion 7 a fitted in the cam case 6 so as to be relatively rotatable. A bottomed cylindrical spring case 7 fixed to the mounting protrusion 4 of the western-style toilet 3 so that the two cases 6 and 7 are passed through the same rotation axis of the spring case 7 and the cam case 6. A hinge shaft 8 with a detent flange 8b connected to each other, a slider 9 inserted in the hinge shaft 8 so as to be movable in the axial direction in the spring case 7 and housed in a detent shape, and the spring A spring member 10 made of a compression coil spring or the like that is housed in the case 7 and presses and urges the slider 9 toward the cam case 6 is provided.

  As shown in FIGS. 3 and 4, the cam case 6 is provided with a plurality of key-like protrusions 11 on the outer periphery thereof in the axial direction, and the protrusions 11 are fitted on the inner periphery of the boss 5 of the toilet seat 2. By forming the groove 12 and fitting the cam case 6 to the boss 5, the cam case 6 is fixed to the rotation base end side of the toilet seat 2.

  Further, as shown in FIGS. 3 and 4, the spring case 7 is provided with a plurality of key-shaped protrusions 15 on the outer periphery thereof in the axial direction and at the tip of one mounting protrusion 4 of the western toilet 3. A groove 17 in which the protrusion 15 is fitted is formed on the inner periphery of the horizontal hole 16, and the spring case 7 is inserted and fitted into the horizontal hole 16, whereby the spring case 7 is fixed to the mounting protrusion 4 of the western toilet 3. The toilet seat 2 is overlaid on the western-style toilet 3, and the open end 7a of the spring case 7 is fitted in the cam case 6 so as to be relatively rotatable.

As shown in FIG. 4, a pair of notches 18, 18 are provided in the open end 7 a of the spring case 7 so as to face each other in the radial direction, and the detents that fit into the notches 18, 18 on the outer periphery of the tip end portion of the slider 9. Protrusions 19 are provided, and the slider 9 is accommodated in the open end portion 7a of the spring case 7 so as to be movable in the axial direction and in a detent shape by fitting the detent projection 19 into the notch 18.

  As shown in FIG. 4, ball spherical cam followers 20 and 20 that are in sliding contact with the cam 13 (see FIG. 5) are integrally formed around the hinge shaft 8 at the tip of the slider 9 as the cam case 6 rotates. ing.

As shown in FIG. 5, the cam 13 is integrally formed inside the bottom wall of the cam case 6. As shown in FIG. 6, the inclination angle of the first inclined surface 13 a for the automatic opening operation of the cam 13 is in contact with the spherical ball of the cam follower 20 and is accompanied by the spring pressure V of the spring member 10 acting on the slider 9. Thus, the angle is set such that a rotational force in the opening direction that is larger than the rotational torque in the closing direction due to the weight of the toilet lid 1 and the toilet seat 2 is generated.

The inclination angle of the second inclined surface 13b of the cam 13 depends on the weight of the toilet lid 1 and the toilet seat 2 together with the spring pressure V ′ of the spring member 10 that contacts the spherical ball of the cam follower 20 and acts on the slider 9. The angle is set so that a rotational force in the opening direction slightly smaller than the rotational torque in the closing direction is generated. Furthermore, the flat surface 13c continues from the lower end of the first inclined surface 13a, and the boundary between the flat surface and the flat surface 13c to the lower end of the second inclined surface 13b is a step.

The flat surface 13c continuing from the lower end of the first inclined surface 13a has a slightly longer distance, but the flip-up moment load of the toilet lid 1 and toilet seat 2 at this time is 1.5 times the dead weight falling moment of the toilet lid 1 and toilet seat 2 By ensuring the above, the toilet lid 1 and the toilet seat 2 do not stop.

Further, since the cam follower step is provided, the opening operation is finished and the cam follower is prevented from returning back to the first inclined surface 13a when the closing operation is performed.

Furthermore, the boundary between the flat surface 13c continuing from the second peak 13b 'and the flat surface from the first peak 13a' is also a step. This step also ends the closing operation and prevents the cam follower from returning back from the second inclined surface 13b when the opening operation is performed. A groove in which the spherical ball of the cam follower 20 slides is formed in the cam 13.

Further, since the polyslider 8c is inserted between the spring case 7 and the flange 8b of the hinge shaft 8, the sliding contact between the spring case 7 and the flange 8b of the hinge shaft 8 is eased. If the spring pressures V and V 'of the spring member 10 acting on the slider 9 are too strong, the tightening by the double nut 28 (28a, 28b) is loosened, and if it is too weak, the double nut 28 is tightened to the contrary. Good. When the spring pressures V and V ′ decrease with time, the tightening of the double nut 28 may be strengthened.

Next, the toilet lid 1 constituting the second member of the present invention is shown in FIG. 2 (b) with respect to the upper surface of the toilet seat 2 which is closed on the western-style toilet bowl 3 constituting the first member of the present invention. ) Pivots between an open state that opens vertically or nearly vertically as indicated by a virtual line, and a closed state that closes horizontally or close to the upper surface of the toilet seat 2 as indicated by a solid line in FIG. An embodiment of the tilt hinge H in such a case will be described below.

  As shown in FIGS. 1 and 3, the toilet lid 1 is formed in a horseshoe cover shape in a plan view having a size capable of covering the entire upper surface of the western toilet 3 and the toilet seat 2. A boss 26 corresponding to one boss 5 of the toilet seat 2 is integrally provided on the pivot base end side behind the toilet lid 1. A tilt hinge H is incorporated between one boss 26 of the toilet lid 1 and one boss 5 of the toilet seat 2. Between the other boss 26 of the toilet lid 1 and the other boss 5 of the toilet seat 2, a hinge (not shown) by a normal joint pin is incorporated.

  In this case, the tilt hinge H itself has the same structure as that of the tilt hinge H of the above-described embodiment, and has a bottomed cylindrical cam case 6 fixed to the boss 26 of the toilet lid 1, and the inside of the cam case 6. In addition, a bottomed cylindrical spring case 7 fixed to the boss 5 of the toilet seat 2 so that the open end portion 7a is fitted so as to be relatively rotatable, and the cam case 6 and the spring case 7 are passed through the same rotational axis. A hinge shaft 8 with a detent for connecting both cases 6 and 7, and a slider 9 inserted in the hinge shaft 8 so as to be movable in the axial direction in the spring case 7 and accommodated in a detent shape. A spring member 10 is provided which is housed in a spring case 7 and is a compression coil spring or the like that presses and insulates the slider 9 toward the cam case 6.

As described in the above embodiment, the cam case 6 is provided with a plurality of key-shaped protrusions 11 on the outer periphery thereof in the axial direction, and a groove (not shown) in which the protrusion 11 fits on the inner periphery of the boss 26 of the toilet lid 1. ) And the cam case 6 is fitted to the boss 26 so that the cam case 6 is fixed to the pivot base end side of the toilet lid 1.

Further, as described in the above embodiment, the spring case 7 has a plurality of key-shaped protrusions 15 provided on the outer periphery thereof in the axial direction, and the boss 5 integrally projecting on the rotation base end side of the toilet seat 2. A groove 12 in which the protrusion 15 is fitted is provided on the inner periphery, and the boss 5 is arranged so that the spring case 7 is arranged in the boss 5 in the axially outward direction of the cam case 6 of the above embodiment.
The spring case 7 is fixed to the rotation base end side of the toilet seat 2 by being fitted inside.

The toilet lid 1 is overlaid on the toilet seat 2, and the open end 7a of the spring case 7 is fitted in the cam case 6 so as to be relatively rotatable. The open end 7a of the spring case 7 has a pair of notches 18, 18
Are provided so as to be opposed to each other in the radial direction, and anti-rotation protrusions 19 and 19 that fit into the notches 18 and 18 are provided on the outer periphery of the front end portion of the slider 9. The spring case 7 is accommodated in the open end portion 7a so as to be movable in the axial direction and in a non-rotating manner.

Around the hinge shaft 8 at the tip of the slider 9 and as described in the above embodiment, as shown in FIG. 4, ball spherical cam followers 20 and 20 that are in sliding contact with the cam 13 as the cam case 6 rotates. Are integrally formed. The cam 13 and the cam case 6 are integrated. The inclination angle of the first inclined surface 13 a for automatically opening the cam 13 is in contact with the spherical ball of the cam follower 20 and is closed by the weight of the toilet lid 1 with the spring pressure W of the spring member 10 acting on the slider 9. The angle is set such that a rotational force in the opening direction that is greater than the rotational torque in the direction is generated.

Further, the inclination angle of the second inclined surface of the cam 13 is in contact with the spherical ball of the cam follower 20, and in the closing direction due to the weight of the toilet lid 1 with the spring pressure W ′ of the spring member 10 acting on the slider 9. The angle is set to generate a rotational force in the opening direction that is slightly smaller than the rotational torque. Furthermore, the flat surface 13c continues from the lower end of the first inclined surface 13a, and the boundary between the flat surface 13c and the flat surface 13c to the lower end of the second inclined surface 13b is a step. The flat surface 13c continuing from the lower end of the first inclined surface 13a has a slightly longer distance, but at this time, the lifting moment load of the toilet lid 1 should be secured at least 1.5 times the dead weight falling moment of the toilet lid 1. Therefore, the toilet lid 1 does not stop.

In addition, the stepped portion prevents the cam follower from returning from the first inclined surface 13a when the opening operation ends and the closing operation is performed. The boundary between the flat surface 13c continuing from the second peak 13b 'and the flat surface from the first peak 13a' is also a step. This step also ends the closing operation and prevents the cam follower from returning back from the second inclined surface 13b when the opening operation is performed.

A groove for sliding the spherical ball of the cam follower is formed in the cam 13. Further, since the polyslider 8c is inserted between the spring case 7 and the flange 8b of the hinge shaft 8, the sliding contact between the spring case 7 and the flange 8b of the hinge shaft 8 is eased. Further, when the spring pressures W and W ′ of the spring member 10 acting on the slider 9 are too strong, the tightening by the double nut 28 is loosened, and when it is too weak, the double nut 28 is tightened. When the spring pressures W and W ′ decrease with time, the tightening of the double nut 28 may be strengthened.

In the above embodiment, the tilt hinge H is incorporated between one boss 5 of the toilet seat 2 and one mounting projection 4 of the western toilet 3, and between the other boss 5 of the toilet seat 2 and the other mounting projection 4 of the western toilet 3. However, the tilt hinges H may be incorporated between the bosses 5 and 5 of the toilet seat 2 and the mounting protrusions 4 and 4 of the western-style toilet 3, respectively. Similarly, a tilt hinge H is incorporated between one boss 26 of the toilet lid 1 and one boss 5 of the toilet seat 2, and a normal boss 26 is disposed between the other boss 26 of the toilet lid 1 and the other boss 5 of the toilet seat 2. In place of the above-described embodiment in which the hinge by the joint pin is incorporated, the toilet lid 1 is provided with a pair of left and right bosses 26, 26, and the tilt hinge is provided between both the bosses 26, 26 and both the bosses 5, 5 of the toilet seat 2. H can also be incorporated.

In the above embodiment, the tilt hinge H that rotates both the toilet lid 1 and the toilet seat 2 and the other tilt hinge H that rotates only the toilet lid 1 are examples. It may be a combination of tilt hinges that rotate only the toilet lid.

It is a perspective view of a western style toilet which shows a toilet seat and a toilet lid attached by a tilt hinge in a fully closed state. FIG. 2 is a side view of the western toilet of FIG. FIG. 2 is an exploded perspective view of a toilet seat, toilet lid and tilt hinge of the western toilet of FIG. It is a disassembled perspective view of a tilt hinge. It is an external view of a cam. It is an expanded sectional view of a cam cut and shown in the circumference direction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Toilet lid 2 Toilet seat 3 Western-style toilet 4 Attachment protrusion 5 Boss 6 Cam case 7 Spring case 7a Open end 8 Hinge shaft 8b Collar 8c Poly slider 9 Slider 10 Spring member 11 Protrusion 12 Groove 13 Cam 13a 1st inclination surface 13b 2nd inclination Surface 13c Flat surface 15 Protrusion 16 Horizontal hole 17 Groove 18 Notch 19 Non-rotating protrusion 20 Cam follower 26 Boss 28 (28a, 28b) Double nut H, H 'Tilt hinge V, V' Spring pressure

Claims (4)

A bottomed cylindrical cam case fixed to one of the first member and the second member that are relatively opened and closed, and the first member so as to be fitted to the cam case so as to be relatively rotatable. A bottomed cylindrical spring case fixed to the other member of the second member, and the cam case and the spring case connected to each other through the same rotation axis of the cam case and the spring case. A hinge shaft with a locking collar, a slider inserted through the hinge shaft and axially movable in the spring case and housed in a non-rotating manner, and a slider housed in the spring case and the cam case A spring member that presses and urges toward the side, and a first slope for automatic opening operation that is disposed around the hinge shaft on the inner bottom surface of the cam case and descends from the first peak toward the inner bottom surface of the cam case at a predetermined tilt angle. Face and A flat surface continues from the lower end of the inclined surface, and the boundary between the flat surface and the flat surface up to the edge of the second inclined surface that is gentler than the first inclined surface is a step, and the second inclined surface Ascending the slope from the top of the mountain and returning to the second summit, it becomes a flat surface again, and the cam case has a step between the flat surface and the flat surface returning to the first summit. And a ball spherical cam follower that is integrally formed around the hinge shaft at the tip of the slider and that slidably contacts the cam as the cam case rotates. A tilt hinge having a torque difference, characterized in that a groove is provided on a cam surface on which a ball ball slides. When the first member or the second member on which the cam follower slides on the first inclined surface is in an open operation state, even if the first inclined surface shifts to a flat surface, the spring-up moment load falls by its own weight. 2. The structure according to claim 1, wherein the cam follower continues to slide on the flat surface as it is, and reaches the ridge of the second inclined surface through a step by securing 1.5 times or more of the moment. Tilt hinge with torque difference. When the first member or the second member on which the cam follower slides on the second inclined surface is in a closing operation state, when the second peak is reached, the weight or step of the first member or the second member causes The tilt hinge having a torque difference according to claim 1, wherein the tilt hinge has a shape that naturally returns to the top of the first mountain.   The first inclined surface on which the cam follower slides when the first member or the second member is opened is radially outer than the second inclined surface on which the cam follower slides when the first member or the second member is closed. The opening direction torque in the opening operation state is also made larger than the opening direction torque in the closing operation state also by increasing the torque radius. Tilt hinge having a torque difference of